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1da177e4 | 1 | /* |
7f3edb94 | 2 | * $Id: synclinkmp.c,v 4.38 2005/07/15 13:29:44 paulkf Exp $ |
1da177e4 LT |
3 | * |
4 | * Device driver for Microgate SyncLink Multiport | |
5 | * high speed multiprotocol serial adapter. | |
6 | * | |
7 | * written by Paul Fulghum for Microgate Corporation | |
8 | * paulkf@microgate.com | |
9 | * | |
10 | * Microgate and SyncLink are trademarks of Microgate Corporation | |
11 | * | |
12 | * Derived from serial.c written by Theodore Ts'o and Linus Torvalds | |
13 | * This code is released under the GNU General Public License (GPL) | |
14 | * | |
15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
16 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
17 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
18 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, | |
19 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
20 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
21 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
22 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
23 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
24 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
25 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
26 | */ | |
27 | ||
28 | #define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq)) | |
29 | #if defined(__i386__) | |
30 | # define BREAKPOINT() asm(" int $3"); | |
31 | #else | |
32 | # define BREAKPOINT() { } | |
33 | #endif | |
34 | ||
35 | #define MAX_DEVICES 12 | |
36 | ||
1da177e4 LT |
37 | #include <linux/module.h> |
38 | #include <linux/errno.h> | |
39 | #include <linux/signal.h> | |
40 | #include <linux/sched.h> | |
41 | #include <linux/timer.h> | |
42 | #include <linux/interrupt.h> | |
43 | #include <linux/pci.h> | |
44 | #include <linux/tty.h> | |
45 | #include <linux/tty_flip.h> | |
46 | #include <linux/serial.h> | |
47 | #include <linux/major.h> | |
48 | #include <linux/string.h> | |
49 | #include <linux/fcntl.h> | |
50 | #include <linux/ptrace.h> | |
51 | #include <linux/ioport.h> | |
52 | #include <linux/mm.h> | |
e6c8dd8a | 53 | #include <linux/seq_file.h> |
1da177e4 LT |
54 | #include <linux/slab.h> |
55 | #include <linux/netdevice.h> | |
56 | #include <linux/vmalloc.h> | |
57 | #include <linux/init.h> | |
1da177e4 LT |
58 | #include <linux/delay.h> |
59 | #include <linux/ioctl.h> | |
60 | ||
61 | #include <asm/system.h> | |
62 | #include <asm/io.h> | |
63 | #include <asm/irq.h> | |
64 | #include <asm/dma.h> | |
65 | #include <linux/bitops.h> | |
66 | #include <asm/types.h> | |
67 | #include <linux/termios.h> | |
68 | #include <linux/workqueue.h> | |
69 | #include <linux/hdlc.h> | |
3dd1247f | 70 | #include <linux/synclink.h> |
1da177e4 | 71 | |
af69c7f9 PF |
72 | #if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINKMP_MODULE)) |
73 | #define SYNCLINK_GENERIC_HDLC 1 | |
74 | #else | |
75 | #define SYNCLINK_GENERIC_HDLC 0 | |
1da177e4 LT |
76 | #endif |
77 | ||
78 | #define GET_USER(error,value,addr) error = get_user(value,addr) | |
79 | #define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0 | |
80 | #define PUT_USER(error,value,addr) error = put_user(value,addr) | |
81 | #define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0 | |
82 | ||
83 | #include <asm/uaccess.h> | |
84 | ||
1da177e4 LT |
85 | static MGSL_PARAMS default_params = { |
86 | MGSL_MODE_HDLC, /* unsigned long mode */ | |
87 | 0, /* unsigned char loopback; */ | |
88 | HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */ | |
89 | HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */ | |
90 | 0, /* unsigned long clock_speed; */ | |
91 | 0xff, /* unsigned char addr_filter; */ | |
92 | HDLC_CRC_16_CCITT, /* unsigned short crc_type; */ | |
93 | HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */ | |
94 | HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */ | |
95 | 9600, /* unsigned long data_rate; */ | |
96 | 8, /* unsigned char data_bits; */ | |
97 | 1, /* unsigned char stop_bits; */ | |
98 | ASYNC_PARITY_NONE /* unsigned char parity; */ | |
99 | }; | |
100 | ||
101 | /* size in bytes of DMA data buffers */ | |
102 | #define SCABUFSIZE 1024 | |
103 | #define SCA_MEM_SIZE 0x40000 | |
104 | #define SCA_BASE_SIZE 512 | |
105 | #define SCA_REG_SIZE 16 | |
106 | #define SCA_MAX_PORTS 4 | |
107 | #define SCAMAXDESC 128 | |
108 | ||
109 | #define BUFFERLISTSIZE 4096 | |
110 | ||
111 | /* SCA-I style DMA buffer descriptor */ | |
112 | typedef struct _SCADESC | |
113 | { | |
114 | u16 next; /* lower l6 bits of next descriptor addr */ | |
115 | u16 buf_ptr; /* lower 16 bits of buffer addr */ | |
116 | u8 buf_base; /* upper 8 bits of buffer addr */ | |
117 | u8 pad1; | |
118 | u16 length; /* length of buffer */ | |
119 | u8 status; /* status of buffer */ | |
120 | u8 pad2; | |
121 | } SCADESC, *PSCADESC; | |
122 | ||
123 | typedef struct _SCADESC_EX | |
124 | { | |
125 | /* device driver bookkeeping section */ | |
126 | char *virt_addr; /* virtual address of data buffer */ | |
127 | u16 phys_entry; /* lower 16-bits of physical address of this descriptor */ | |
128 | } SCADESC_EX, *PSCADESC_EX; | |
129 | ||
130 | /* The queue of BH actions to be performed */ | |
131 | ||
132 | #define BH_RECEIVE 1 | |
133 | #define BH_TRANSMIT 2 | |
134 | #define BH_STATUS 4 | |
135 | ||
136 | #define IO_PIN_SHUTDOWN_LIMIT 100 | |
137 | ||
1da177e4 LT |
138 | struct _input_signal_events { |
139 | int ri_up; | |
140 | int ri_down; | |
141 | int dsr_up; | |
142 | int dsr_down; | |
143 | int dcd_up; | |
144 | int dcd_down; | |
145 | int cts_up; | |
146 | int cts_down; | |
147 | }; | |
148 | ||
149 | /* | |
150 | * Device instance data structure | |
151 | */ | |
152 | typedef struct _synclinkmp_info { | |
153 | void *if_ptr; /* General purpose pointer (used by SPPP) */ | |
154 | int magic; | |
8fb06c77 | 155 | struct tty_port port; |
1da177e4 LT |
156 | int line; |
157 | unsigned short close_delay; | |
158 | unsigned short closing_wait; /* time to wait before closing */ | |
159 | ||
160 | struct mgsl_icount icount; | |
161 | ||
1da177e4 LT |
162 | int timeout; |
163 | int x_char; /* xon/xoff character */ | |
1da177e4 LT |
164 | u16 read_status_mask1; /* break detection (SR1 indications) */ |
165 | u16 read_status_mask2; /* parity/framing/overun (SR2 indications) */ | |
166 | unsigned char ignore_status_mask1; /* break detection (SR1 indications) */ | |
167 | unsigned char ignore_status_mask2; /* parity/framing/overun (SR2 indications) */ | |
168 | unsigned char *tx_buf; | |
169 | int tx_put; | |
170 | int tx_get; | |
171 | int tx_count; | |
172 | ||
1da177e4 LT |
173 | wait_queue_head_t status_event_wait_q; |
174 | wait_queue_head_t event_wait_q; | |
175 | struct timer_list tx_timer; /* HDLC transmit timeout timer */ | |
176 | struct _synclinkmp_info *next_device; /* device list link */ | |
177 | struct timer_list status_timer; /* input signal status check timer */ | |
178 | ||
179 | spinlock_t lock; /* spinlock for synchronizing with ISR */ | |
180 | struct work_struct task; /* task structure for scheduling bh */ | |
181 | ||
182 | u32 max_frame_size; /* as set by device config */ | |
183 | ||
184 | u32 pending_bh; | |
185 | ||
0fab6de0 | 186 | bool bh_running; /* Protection from multiple */ |
1da177e4 | 187 | int isr_overflow; |
0fab6de0 | 188 | bool bh_requested; |
1da177e4 LT |
189 | |
190 | int dcd_chkcount; /* check counts to prevent */ | |
191 | int cts_chkcount; /* too many IRQs if a signal */ | |
192 | int dsr_chkcount; /* is floating */ | |
193 | int ri_chkcount; | |
194 | ||
195 | char *buffer_list; /* virtual address of Rx & Tx buffer lists */ | |
196 | unsigned long buffer_list_phys; | |
197 | ||
198 | unsigned int rx_buf_count; /* count of total allocated Rx buffers */ | |
199 | SCADESC *rx_buf_list; /* list of receive buffer entries */ | |
200 | SCADESC_EX rx_buf_list_ex[SCAMAXDESC]; /* list of receive buffer entries */ | |
201 | unsigned int current_rx_buf; | |
202 | ||
203 | unsigned int tx_buf_count; /* count of total allocated Tx buffers */ | |
204 | SCADESC *tx_buf_list; /* list of transmit buffer entries */ | |
205 | SCADESC_EX tx_buf_list_ex[SCAMAXDESC]; /* list of transmit buffer entries */ | |
206 | unsigned int last_tx_buf; | |
207 | ||
208 | unsigned char *tmp_rx_buf; | |
209 | unsigned int tmp_rx_buf_count; | |
210 | ||
0fab6de0 JP |
211 | bool rx_enabled; |
212 | bool rx_overflow; | |
1da177e4 | 213 | |
0fab6de0 JP |
214 | bool tx_enabled; |
215 | bool tx_active; | |
1da177e4 LT |
216 | u32 idle_mode; |
217 | ||
218 | unsigned char ie0_value; | |
219 | unsigned char ie1_value; | |
220 | unsigned char ie2_value; | |
221 | unsigned char ctrlreg_value; | |
222 | unsigned char old_signals; | |
223 | ||
224 | char device_name[25]; /* device instance name */ | |
225 | ||
226 | int port_count; | |
227 | int adapter_num; | |
228 | int port_num; | |
229 | ||
230 | struct _synclinkmp_info *port_array[SCA_MAX_PORTS]; | |
231 | ||
232 | unsigned int bus_type; /* expansion bus type (ISA,EISA,PCI) */ | |
233 | ||
234 | unsigned int irq_level; /* interrupt level */ | |
235 | unsigned long irq_flags; | |
0fab6de0 | 236 | bool irq_requested; /* true if IRQ requested */ |
1da177e4 LT |
237 | |
238 | MGSL_PARAMS params; /* communications parameters */ | |
239 | ||
240 | unsigned char serial_signals; /* current serial signal states */ | |
241 | ||
0fab6de0 | 242 | bool irq_occurred; /* for diagnostics use */ |
1da177e4 LT |
243 | unsigned int init_error; /* Initialization startup error */ |
244 | ||
245 | u32 last_mem_alloc; | |
246 | unsigned char* memory_base; /* shared memory address (PCI only) */ | |
247 | u32 phys_memory_base; | |
248 | int shared_mem_requested; | |
249 | ||
250 | unsigned char* sca_base; /* HD64570 SCA Memory address */ | |
251 | u32 phys_sca_base; | |
252 | u32 sca_offset; | |
0fab6de0 | 253 | bool sca_base_requested; |
1da177e4 LT |
254 | |
255 | unsigned char* lcr_base; /* local config registers (PCI only) */ | |
256 | u32 phys_lcr_base; | |
257 | u32 lcr_offset; | |
258 | int lcr_mem_requested; | |
259 | ||
260 | unsigned char* statctrl_base; /* status/control register memory */ | |
261 | u32 phys_statctrl_base; | |
262 | u32 statctrl_offset; | |
0fab6de0 | 263 | bool sca_statctrl_requested; |
1da177e4 LT |
264 | |
265 | u32 misc_ctrl_value; | |
266 | char flag_buf[MAX_ASYNC_BUFFER_SIZE]; | |
267 | char char_buf[MAX_ASYNC_BUFFER_SIZE]; | |
0fab6de0 | 268 | bool drop_rts_on_tx_done; |
1da177e4 LT |
269 | |
270 | struct _input_signal_events input_signal_events; | |
271 | ||
272 | /* SPPP/Cisco HDLC device parts */ | |
273 | int netcount; | |
1da177e4 LT |
274 | spinlock_t netlock; |
275 | ||
af69c7f9 | 276 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
277 | struct net_device *netdev; |
278 | #endif | |
279 | ||
280 | } SLMP_INFO; | |
281 | ||
282 | #define MGSL_MAGIC 0x5401 | |
283 | ||
284 | /* | |
285 | * define serial signal status change macros | |
286 | */ | |
287 | #define MISCSTATUS_DCD_LATCHED (SerialSignal_DCD<<8) /* indicates change in DCD */ | |
288 | #define MISCSTATUS_RI_LATCHED (SerialSignal_RI<<8) /* indicates change in RI */ | |
289 | #define MISCSTATUS_CTS_LATCHED (SerialSignal_CTS<<8) /* indicates change in CTS */ | |
290 | #define MISCSTATUS_DSR_LATCHED (SerialSignal_DSR<<8) /* change in DSR */ | |
291 | ||
292 | /* Common Register macros */ | |
293 | #define LPR 0x00 | |
294 | #define PABR0 0x02 | |
295 | #define PABR1 0x03 | |
296 | #define WCRL 0x04 | |
297 | #define WCRM 0x05 | |
298 | #define WCRH 0x06 | |
299 | #define DPCR 0x08 | |
300 | #define DMER 0x09 | |
301 | #define ISR0 0x10 | |
302 | #define ISR1 0x11 | |
303 | #define ISR2 0x12 | |
304 | #define IER0 0x14 | |
305 | #define IER1 0x15 | |
306 | #define IER2 0x16 | |
307 | #define ITCR 0x18 | |
308 | #define INTVR 0x1a | |
309 | #define IMVR 0x1c | |
310 | ||
311 | /* MSCI Register macros */ | |
312 | #define TRB 0x20 | |
313 | #define TRBL 0x20 | |
314 | #define TRBH 0x21 | |
315 | #define SR0 0x22 | |
316 | #define SR1 0x23 | |
317 | #define SR2 0x24 | |
318 | #define SR3 0x25 | |
319 | #define FST 0x26 | |
320 | #define IE0 0x28 | |
321 | #define IE1 0x29 | |
322 | #define IE2 0x2a | |
323 | #define FIE 0x2b | |
324 | #define CMD 0x2c | |
325 | #define MD0 0x2e | |
326 | #define MD1 0x2f | |
327 | #define MD2 0x30 | |
328 | #define CTL 0x31 | |
329 | #define SA0 0x32 | |
330 | #define SA1 0x33 | |
331 | #define IDL 0x34 | |
332 | #define TMC 0x35 | |
333 | #define RXS 0x36 | |
334 | #define TXS 0x37 | |
335 | #define TRC0 0x38 | |
336 | #define TRC1 0x39 | |
337 | #define RRC 0x3a | |
338 | #define CST0 0x3c | |
339 | #define CST1 0x3d | |
340 | ||
341 | /* Timer Register Macros */ | |
342 | #define TCNT 0x60 | |
343 | #define TCNTL 0x60 | |
344 | #define TCNTH 0x61 | |
345 | #define TCONR 0x62 | |
346 | #define TCONRL 0x62 | |
347 | #define TCONRH 0x63 | |
348 | #define TMCS 0x64 | |
349 | #define TEPR 0x65 | |
350 | ||
351 | /* DMA Controller Register macros */ | |
352 | #define DARL 0x80 | |
353 | #define DARH 0x81 | |
354 | #define DARB 0x82 | |
355 | #define BAR 0x80 | |
356 | #define BARL 0x80 | |
357 | #define BARH 0x81 | |
358 | #define BARB 0x82 | |
359 | #define SAR 0x84 | |
360 | #define SARL 0x84 | |
361 | #define SARH 0x85 | |
362 | #define SARB 0x86 | |
363 | #define CPB 0x86 | |
364 | #define CDA 0x88 | |
365 | #define CDAL 0x88 | |
366 | #define CDAH 0x89 | |
367 | #define EDA 0x8a | |
368 | #define EDAL 0x8a | |
369 | #define EDAH 0x8b | |
370 | #define BFL 0x8c | |
371 | #define BFLL 0x8c | |
372 | #define BFLH 0x8d | |
373 | #define BCR 0x8e | |
374 | #define BCRL 0x8e | |
375 | #define BCRH 0x8f | |
376 | #define DSR 0x90 | |
377 | #define DMR 0x91 | |
378 | #define FCT 0x93 | |
379 | #define DIR 0x94 | |
380 | #define DCMD 0x95 | |
381 | ||
382 | /* combine with timer or DMA register address */ | |
383 | #define TIMER0 0x00 | |
384 | #define TIMER1 0x08 | |
385 | #define TIMER2 0x10 | |
386 | #define TIMER3 0x18 | |
387 | #define RXDMA 0x00 | |
388 | #define TXDMA 0x20 | |
389 | ||
390 | /* SCA Command Codes */ | |
391 | #define NOOP 0x00 | |
392 | #define TXRESET 0x01 | |
393 | #define TXENABLE 0x02 | |
394 | #define TXDISABLE 0x03 | |
395 | #define TXCRCINIT 0x04 | |
396 | #define TXCRCEXCL 0x05 | |
397 | #define TXEOM 0x06 | |
398 | #define TXABORT 0x07 | |
399 | #define MPON 0x08 | |
400 | #define TXBUFCLR 0x09 | |
401 | #define RXRESET 0x11 | |
402 | #define RXENABLE 0x12 | |
403 | #define RXDISABLE 0x13 | |
404 | #define RXCRCINIT 0x14 | |
405 | #define RXREJECT 0x15 | |
406 | #define SEARCHMP 0x16 | |
407 | #define RXCRCEXCL 0x17 | |
408 | #define RXCRCCALC 0x18 | |
409 | #define CHRESET 0x21 | |
410 | #define HUNT 0x31 | |
411 | ||
412 | /* DMA command codes */ | |
413 | #define SWABORT 0x01 | |
414 | #define FEICLEAR 0x02 | |
415 | ||
416 | /* IE0 */ | |
417 | #define TXINTE BIT7 | |
418 | #define RXINTE BIT6 | |
419 | #define TXRDYE BIT1 | |
420 | #define RXRDYE BIT0 | |
421 | ||
422 | /* IE1 & SR1 */ | |
423 | #define UDRN BIT7 | |
424 | #define IDLE BIT6 | |
425 | #define SYNCD BIT4 | |
426 | #define FLGD BIT4 | |
427 | #define CCTS BIT3 | |
428 | #define CDCD BIT2 | |
429 | #define BRKD BIT1 | |
430 | #define ABTD BIT1 | |
431 | #define GAPD BIT1 | |
432 | #define BRKE BIT0 | |
433 | #define IDLD BIT0 | |
434 | ||
435 | /* IE2 & SR2 */ | |
436 | #define EOM BIT7 | |
437 | #define PMP BIT6 | |
438 | #define SHRT BIT6 | |
439 | #define PE BIT5 | |
440 | #define ABT BIT5 | |
441 | #define FRME BIT4 | |
442 | #define RBIT BIT4 | |
443 | #define OVRN BIT3 | |
444 | #define CRCE BIT2 | |
445 | ||
446 | ||
447 | /* | |
448 | * Global linked list of SyncLink devices | |
449 | */ | |
450 | static SLMP_INFO *synclinkmp_device_list = NULL; | |
451 | static int synclinkmp_adapter_count = -1; | |
452 | static int synclinkmp_device_count = 0; | |
453 | ||
454 | /* | |
455 | * Set this param to non-zero to load eax with the | |
456 | * .text section address and breakpoint on module load. | |
457 | * This is useful for use with gdb and add-symbol-file command. | |
458 | */ | |
8fb06c77 | 459 | static int break_on_load = 0; |
1da177e4 LT |
460 | |
461 | /* | |
462 | * Driver major number, defaults to zero to get auto | |
463 | * assigned major number. May be forced as module parameter. | |
464 | */ | |
8fb06c77 | 465 | static int ttymajor = 0; |
1da177e4 LT |
466 | |
467 | /* | |
468 | * Array of user specified options for ISA adapters. | |
469 | */ | |
470 | static int debug_level = 0; | |
471 | static int maxframe[MAX_DEVICES] = {0,}; | |
1da177e4 LT |
472 | |
473 | module_param(break_on_load, bool, 0); | |
474 | module_param(ttymajor, int, 0); | |
475 | module_param(debug_level, int, 0); | |
476 | module_param_array(maxframe, int, NULL, 0); | |
1da177e4 LT |
477 | |
478 | static char *driver_name = "SyncLink MultiPort driver"; | |
7f3edb94 | 479 | static char *driver_version = "$Revision: 4.38 $"; |
1da177e4 LT |
480 | |
481 | static int synclinkmp_init_one(struct pci_dev *dev,const struct pci_device_id *ent); | |
482 | static void synclinkmp_remove_one(struct pci_dev *dev); | |
483 | ||
484 | static struct pci_device_id synclinkmp_pci_tbl[] = { | |
485 | { PCI_VENDOR_ID_MICROGATE, PCI_DEVICE_ID_MICROGATE_SCA, PCI_ANY_ID, PCI_ANY_ID, }, | |
486 | { 0, }, /* terminate list */ | |
487 | }; | |
488 | MODULE_DEVICE_TABLE(pci, synclinkmp_pci_tbl); | |
489 | ||
490 | MODULE_LICENSE("GPL"); | |
491 | ||
492 | static struct pci_driver synclinkmp_pci_driver = { | |
493 | .name = "synclinkmp", | |
494 | .id_table = synclinkmp_pci_tbl, | |
495 | .probe = synclinkmp_init_one, | |
496 | .remove = __devexit_p(synclinkmp_remove_one), | |
497 | }; | |
498 | ||
499 | ||
500 | static struct tty_driver *serial_driver; | |
501 | ||
502 | /* number of characters left in xmit buffer before we ask for more */ | |
503 | #define WAKEUP_CHARS 256 | |
504 | ||
505 | ||
506 | /* tty callbacks */ | |
507 | ||
508 | static int open(struct tty_struct *tty, struct file * filp); | |
509 | static void close(struct tty_struct *tty, struct file * filp); | |
510 | static void hangup(struct tty_struct *tty); | |
606d099c | 511 | static void set_termios(struct tty_struct *tty, struct ktermios *old_termios); |
1da177e4 LT |
512 | |
513 | static int write(struct tty_struct *tty, const unsigned char *buf, int count); | |
55da7789 | 514 | static int put_char(struct tty_struct *tty, unsigned char ch); |
1da177e4 LT |
515 | static void send_xchar(struct tty_struct *tty, char ch); |
516 | static void wait_until_sent(struct tty_struct *tty, int timeout); | |
517 | static int write_room(struct tty_struct *tty); | |
518 | static void flush_chars(struct tty_struct *tty); | |
519 | static void flush_buffer(struct tty_struct *tty); | |
520 | static void tx_hold(struct tty_struct *tty); | |
521 | static void tx_release(struct tty_struct *tty); | |
522 | ||
523 | static int ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg); | |
1da177e4 LT |
524 | static int chars_in_buffer(struct tty_struct *tty); |
525 | static void throttle(struct tty_struct * tty); | |
526 | static void unthrottle(struct tty_struct * tty); | |
9e98966c | 527 | static int set_break(struct tty_struct *tty, int break_state); |
1da177e4 | 528 | |
af69c7f9 | 529 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
530 | #define dev_to_port(D) (dev_to_hdlc(D)->priv) |
531 | static void hdlcdev_tx_done(SLMP_INFO *info); | |
532 | static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size); | |
533 | static int hdlcdev_init(SLMP_INFO *info); | |
534 | static void hdlcdev_exit(SLMP_INFO *info); | |
535 | #endif | |
536 | ||
537 | /* ioctl handlers */ | |
538 | ||
539 | static int get_stats(SLMP_INFO *info, struct mgsl_icount __user *user_icount); | |
540 | static int get_params(SLMP_INFO *info, MGSL_PARAMS __user *params); | |
541 | static int set_params(SLMP_INFO *info, MGSL_PARAMS __user *params); | |
542 | static int get_txidle(SLMP_INFO *info, int __user *idle_mode); | |
543 | static int set_txidle(SLMP_INFO *info, int idle_mode); | |
544 | static int tx_enable(SLMP_INFO *info, int enable); | |
545 | static int tx_abort(SLMP_INFO *info); | |
546 | static int rx_enable(SLMP_INFO *info, int enable); | |
1da177e4 LT |
547 | static int modem_input_wait(SLMP_INFO *info,int arg); |
548 | static int wait_mgsl_event(SLMP_INFO *info, int __user *mask_ptr); | |
549 | static int tiocmget(struct tty_struct *tty, struct file *file); | |
550 | static int tiocmset(struct tty_struct *tty, struct file *file, | |
551 | unsigned int set, unsigned int clear); | |
9e98966c | 552 | static int set_break(struct tty_struct *tty, int break_state); |
1da177e4 LT |
553 | |
554 | static void add_device(SLMP_INFO *info); | |
555 | static void device_init(int adapter_num, struct pci_dev *pdev); | |
556 | static int claim_resources(SLMP_INFO *info); | |
557 | static void release_resources(SLMP_INFO *info); | |
558 | ||
559 | static int startup(SLMP_INFO *info); | |
560 | static int block_til_ready(struct tty_struct *tty, struct file * filp,SLMP_INFO *info); | |
31f35939 | 561 | static int carrier_raised(struct tty_port *port); |
1da177e4 LT |
562 | static void shutdown(SLMP_INFO *info); |
563 | static void program_hw(SLMP_INFO *info); | |
564 | static void change_params(SLMP_INFO *info); | |
565 | ||
0fab6de0 JP |
566 | static bool init_adapter(SLMP_INFO *info); |
567 | static bool register_test(SLMP_INFO *info); | |
568 | static bool irq_test(SLMP_INFO *info); | |
569 | static bool loopback_test(SLMP_INFO *info); | |
1da177e4 | 570 | static int adapter_test(SLMP_INFO *info); |
0fab6de0 | 571 | static bool memory_test(SLMP_INFO *info); |
1da177e4 LT |
572 | |
573 | static void reset_adapter(SLMP_INFO *info); | |
574 | static void reset_port(SLMP_INFO *info); | |
575 | static void async_mode(SLMP_INFO *info); | |
576 | static void hdlc_mode(SLMP_INFO *info); | |
577 | ||
578 | static void rx_stop(SLMP_INFO *info); | |
579 | static void rx_start(SLMP_INFO *info); | |
580 | static void rx_reset_buffers(SLMP_INFO *info); | |
581 | static void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last); | |
0fab6de0 | 582 | static bool rx_get_frame(SLMP_INFO *info); |
1da177e4 LT |
583 | |
584 | static void tx_start(SLMP_INFO *info); | |
585 | static void tx_stop(SLMP_INFO *info); | |
586 | static void tx_load_fifo(SLMP_INFO *info); | |
587 | static void tx_set_idle(SLMP_INFO *info); | |
588 | static void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count); | |
589 | ||
590 | static void get_signals(SLMP_INFO *info); | |
591 | static void set_signals(SLMP_INFO *info); | |
592 | static void enable_loopback(SLMP_INFO *info, int enable); | |
593 | static void set_rate(SLMP_INFO *info, u32 data_rate); | |
594 | ||
595 | static int bh_action(SLMP_INFO *info); | |
c4028958 | 596 | static void bh_handler(struct work_struct *work); |
1da177e4 LT |
597 | static void bh_receive(SLMP_INFO *info); |
598 | static void bh_transmit(SLMP_INFO *info); | |
599 | static void bh_status(SLMP_INFO *info); | |
600 | static void isr_timer(SLMP_INFO *info); | |
601 | static void isr_rxint(SLMP_INFO *info); | |
602 | static void isr_rxrdy(SLMP_INFO *info); | |
603 | static void isr_txint(SLMP_INFO *info); | |
604 | static void isr_txrdy(SLMP_INFO *info); | |
605 | static void isr_rxdmaok(SLMP_INFO *info); | |
606 | static void isr_rxdmaerror(SLMP_INFO *info); | |
607 | static void isr_txdmaok(SLMP_INFO *info); | |
608 | static void isr_txdmaerror(SLMP_INFO *info); | |
609 | static void isr_io_pin(SLMP_INFO *info, u16 status); | |
610 | ||
611 | static int alloc_dma_bufs(SLMP_INFO *info); | |
612 | static void free_dma_bufs(SLMP_INFO *info); | |
613 | static int alloc_buf_list(SLMP_INFO *info); | |
614 | static int alloc_frame_bufs(SLMP_INFO *info, SCADESC *list, SCADESC_EX *list_ex,int count); | |
615 | static int alloc_tmp_rx_buf(SLMP_INFO *info); | |
616 | static void free_tmp_rx_buf(SLMP_INFO *info); | |
617 | ||
618 | static void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count); | |
619 | static void trace_block(SLMP_INFO *info, const char* data, int count, int xmit); | |
620 | static void tx_timeout(unsigned long context); | |
621 | static void status_timeout(unsigned long context); | |
622 | ||
623 | static unsigned char read_reg(SLMP_INFO *info, unsigned char addr); | |
624 | static void write_reg(SLMP_INFO *info, unsigned char addr, unsigned char val); | |
625 | static u16 read_reg16(SLMP_INFO *info, unsigned char addr); | |
626 | static void write_reg16(SLMP_INFO *info, unsigned char addr, u16 val); | |
627 | static unsigned char read_status_reg(SLMP_INFO * info); | |
628 | static void write_control_reg(SLMP_INFO * info); | |
629 | ||
630 | ||
631 | static unsigned char rx_active_fifo_level = 16; // rx request FIFO activation level in bytes | |
632 | static unsigned char tx_active_fifo_level = 16; // tx request FIFO activation level in bytes | |
633 | static unsigned char tx_negate_fifo_level = 32; // tx request FIFO negation level in bytes | |
634 | ||
635 | static u32 misc_ctrl_value = 0x007e4040; | |
761a444d | 636 | static u32 lcr1_brdr_value = 0x00800028; |
1da177e4 LT |
637 | |
638 | static u32 read_ahead_count = 8; | |
639 | ||
640 | /* DPCR, DMA Priority Control | |
641 | * | |
642 | * 07..05 Not used, must be 0 | |
643 | * 04 BRC, bus release condition: 0=all transfers complete | |
644 | * 1=release after 1 xfer on all channels | |
645 | * 03 CCC, channel change condition: 0=every cycle | |
646 | * 1=after each channel completes all xfers | |
647 | * 02..00 PR<2..0>, priority 100=round robin | |
648 | * | |
649 | * 00000100 = 0x00 | |
650 | */ | |
651 | static unsigned char dma_priority = 0x04; | |
652 | ||
653 | // Number of bytes that can be written to shared RAM | |
654 | // in a single write operation | |
655 | static u32 sca_pci_load_interval = 64; | |
656 | ||
657 | /* | |
658 | * 1st function defined in .text section. Calling this function in | |
659 | * init_module() followed by a breakpoint allows a remote debugger | |
660 | * (gdb) to get the .text address for the add-symbol-file command. | |
661 | * This allows remote debugging of dynamically loadable modules. | |
662 | */ | |
663 | static void* synclinkmp_get_text_ptr(void); | |
664 | static void* synclinkmp_get_text_ptr(void) {return synclinkmp_get_text_ptr;} | |
665 | ||
666 | static inline int sanity_check(SLMP_INFO *info, | |
667 | char *name, const char *routine) | |
668 | { | |
669 | #ifdef SANITY_CHECK | |
670 | static const char *badmagic = | |
671 | "Warning: bad magic number for synclinkmp_struct (%s) in %s\n"; | |
672 | static const char *badinfo = | |
673 | "Warning: null synclinkmp_struct for (%s) in %s\n"; | |
674 | ||
675 | if (!info) { | |
676 | printk(badinfo, name, routine); | |
677 | return 1; | |
678 | } | |
679 | if (info->magic != MGSL_MAGIC) { | |
680 | printk(badmagic, name, routine); | |
681 | return 1; | |
682 | } | |
683 | #else | |
684 | if (!info) | |
685 | return 1; | |
686 | #endif | |
687 | return 0; | |
688 | } | |
689 | ||
690 | /** | |
691 | * line discipline callback wrappers | |
692 | * | |
693 | * The wrappers maintain line discipline references | |
694 | * while calling into the line discipline. | |
695 | * | |
696 | * ldisc_receive_buf - pass receive data to line discipline | |
697 | */ | |
698 | ||
699 | static void ldisc_receive_buf(struct tty_struct *tty, | |
700 | const __u8 *data, char *flags, int count) | |
701 | { | |
702 | struct tty_ldisc *ld; | |
703 | if (!tty) | |
704 | return; | |
705 | ld = tty_ldisc_ref(tty); | |
706 | if (ld) { | |
a352def2 AC |
707 | if (ld->ops->receive_buf) |
708 | ld->ops->receive_buf(tty, data, flags, count); | |
1da177e4 LT |
709 | tty_ldisc_deref(ld); |
710 | } | |
711 | } | |
712 | ||
713 | /* tty callbacks */ | |
714 | ||
715 | /* Called when a port is opened. Init and enable port. | |
716 | */ | |
717 | static int open(struct tty_struct *tty, struct file *filp) | |
718 | { | |
719 | SLMP_INFO *info; | |
720 | int retval, line; | |
721 | unsigned long flags; | |
722 | ||
723 | line = tty->index; | |
724 | if ((line < 0) || (line >= synclinkmp_device_count)) { | |
725 | printk("%s(%d): open with invalid line #%d.\n", | |
726 | __FILE__,__LINE__,line); | |
727 | return -ENODEV; | |
728 | } | |
729 | ||
730 | info = synclinkmp_device_list; | |
731 | while(info && info->line != line) | |
732 | info = info->next_device; | |
733 | if (sanity_check(info, tty->name, "open")) | |
734 | return -ENODEV; | |
735 | if ( info->init_error ) { | |
736 | printk("%s(%d):%s device is not allocated, init error=%d\n", | |
737 | __FILE__,__LINE__,info->device_name,info->init_error); | |
738 | return -ENODEV; | |
739 | } | |
740 | ||
741 | tty->driver_data = info; | |
8fb06c77 | 742 | info->port.tty = tty; |
1da177e4 LT |
743 | |
744 | if (debug_level >= DEBUG_LEVEL_INFO) | |
745 | printk("%s(%d):%s open(), old ref count = %d\n", | |
8fb06c77 | 746 | __FILE__,__LINE__,tty->driver->name, info->port.count); |
1da177e4 LT |
747 | |
748 | /* If port is closing, signal caller to try again */ | |
8fb06c77 AC |
749 | if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){ |
750 | if (info->port.flags & ASYNC_CLOSING) | |
751 | interruptible_sleep_on(&info->port.close_wait); | |
752 | retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ? | |
1da177e4 LT |
753 | -EAGAIN : -ERESTARTSYS); |
754 | goto cleanup; | |
755 | } | |
756 | ||
8fb06c77 | 757 | info->port.tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0; |
1da177e4 LT |
758 | |
759 | spin_lock_irqsave(&info->netlock, flags); | |
760 | if (info->netcount) { | |
761 | retval = -EBUSY; | |
762 | spin_unlock_irqrestore(&info->netlock, flags); | |
763 | goto cleanup; | |
764 | } | |
8fb06c77 | 765 | info->port.count++; |
1da177e4 LT |
766 | spin_unlock_irqrestore(&info->netlock, flags); |
767 | ||
8fb06c77 | 768 | if (info->port.count == 1) { |
1da177e4 LT |
769 | /* 1st open on this device, init hardware */ |
770 | retval = startup(info); | |
771 | if (retval < 0) | |
772 | goto cleanup; | |
773 | } | |
774 | ||
775 | retval = block_til_ready(tty, filp, info); | |
776 | if (retval) { | |
777 | if (debug_level >= DEBUG_LEVEL_INFO) | |
778 | printk("%s(%d):%s block_til_ready() returned %d\n", | |
779 | __FILE__,__LINE__, info->device_name, retval); | |
780 | goto cleanup; | |
781 | } | |
782 | ||
783 | if (debug_level >= DEBUG_LEVEL_INFO) | |
784 | printk("%s(%d):%s open() success\n", | |
785 | __FILE__,__LINE__, info->device_name); | |
786 | retval = 0; | |
787 | ||
788 | cleanup: | |
789 | if (retval) { | |
790 | if (tty->count == 1) | |
8fb06c77 AC |
791 | info->port.tty = NULL; /* tty layer will release tty struct */ |
792 | if(info->port.count) | |
793 | info->port.count--; | |
1da177e4 LT |
794 | } |
795 | ||
796 | return retval; | |
797 | } | |
798 | ||
799 | /* Called when port is closed. Wait for remaining data to be | |
800 | * sent. Disable port and free resources. | |
801 | */ | |
802 | static void close(struct tty_struct *tty, struct file *filp) | |
803 | { | |
c9f19e96 | 804 | SLMP_INFO * info = tty->driver_data; |
1da177e4 LT |
805 | |
806 | if (sanity_check(info, tty->name, "close")) | |
807 | return; | |
808 | ||
809 | if (debug_level >= DEBUG_LEVEL_INFO) | |
810 | printk("%s(%d):%s close() entry, count=%d\n", | |
8fb06c77 | 811 | __FILE__,__LINE__, info->device_name, info->port.count); |
1da177e4 | 812 | |
a6614999 | 813 | if (tty_port_close_start(&info->port, tty, filp) == 0) |
1da177e4 | 814 | goto cleanup; |
a360fae6 AC |
815 | |
816 | mutex_lock(&info->port.mutex); | |
8fb06c77 | 817 | if (info->port.flags & ASYNC_INITIALIZED) |
1da177e4 LT |
818 | wait_until_sent(tty, info->timeout); |
819 | ||
978e595f | 820 | flush_buffer(tty); |
1da177e4 | 821 | tty_ldisc_flush(tty); |
1da177e4 | 822 | shutdown(info); |
a360fae6 | 823 | mutex_unlock(&info->port.mutex); |
1da177e4 | 824 | |
a6614999 | 825 | tty_port_close_end(&info->port, tty); |
8fb06c77 | 826 | info->port.tty = NULL; |
1da177e4 LT |
827 | cleanup: |
828 | if (debug_level >= DEBUG_LEVEL_INFO) | |
829 | printk("%s(%d):%s close() exit, count=%d\n", __FILE__,__LINE__, | |
8fb06c77 | 830 | tty->driver->name, info->port.count); |
1da177e4 LT |
831 | } |
832 | ||
833 | /* Called by tty_hangup() when a hangup is signaled. | |
834 | * This is the same as closing all open descriptors for the port. | |
835 | */ | |
836 | static void hangup(struct tty_struct *tty) | |
837 | { | |
c9f19e96 | 838 | SLMP_INFO *info = tty->driver_data; |
a360fae6 | 839 | unsigned long flags; |
1da177e4 LT |
840 | |
841 | if (debug_level >= DEBUG_LEVEL_INFO) | |
842 | printk("%s(%d):%s hangup()\n", | |
843 | __FILE__,__LINE__, info->device_name ); | |
844 | ||
845 | if (sanity_check(info, tty->name, "hangup")) | |
846 | return; | |
847 | ||
a360fae6 | 848 | mutex_lock(&info->port.mutex); |
1da177e4 LT |
849 | flush_buffer(tty); |
850 | shutdown(info); | |
851 | ||
a360fae6 | 852 | spin_lock_irqsave(&info->port.lock, flags); |
8fb06c77 AC |
853 | info->port.count = 0; |
854 | info->port.flags &= ~ASYNC_NORMAL_ACTIVE; | |
855 | info->port.tty = NULL; | |
a360fae6 AC |
856 | spin_unlock_irqrestore(&info->port.lock, flags); |
857 | mutex_unlock(&info->port.mutex); | |
1da177e4 | 858 | |
8fb06c77 | 859 | wake_up_interruptible(&info->port.open_wait); |
1da177e4 LT |
860 | } |
861 | ||
862 | /* Set new termios settings | |
863 | */ | |
606d099c | 864 | static void set_termios(struct tty_struct *tty, struct ktermios *old_termios) |
1da177e4 | 865 | { |
c9f19e96 | 866 | SLMP_INFO *info = tty->driver_data; |
1da177e4 LT |
867 | unsigned long flags; |
868 | ||
869 | if (debug_level >= DEBUG_LEVEL_INFO) | |
870 | printk("%s(%d):%s set_termios()\n", __FILE__,__LINE__, | |
871 | tty->driver->name ); | |
872 | ||
1da177e4 LT |
873 | change_params(info); |
874 | ||
875 | /* Handle transition to B0 status */ | |
876 | if (old_termios->c_cflag & CBAUD && | |
877 | !(tty->termios->c_cflag & CBAUD)) { | |
878 | info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); | |
879 | spin_lock_irqsave(&info->lock,flags); | |
880 | set_signals(info); | |
881 | spin_unlock_irqrestore(&info->lock,flags); | |
882 | } | |
883 | ||
884 | /* Handle transition away from B0 status */ | |
885 | if (!(old_termios->c_cflag & CBAUD) && | |
886 | tty->termios->c_cflag & CBAUD) { | |
887 | info->serial_signals |= SerialSignal_DTR; | |
888 | if (!(tty->termios->c_cflag & CRTSCTS) || | |
889 | !test_bit(TTY_THROTTLED, &tty->flags)) { | |
890 | info->serial_signals |= SerialSignal_RTS; | |
891 | } | |
892 | spin_lock_irqsave(&info->lock,flags); | |
893 | set_signals(info); | |
894 | spin_unlock_irqrestore(&info->lock,flags); | |
895 | } | |
896 | ||
897 | /* Handle turning off CRTSCTS */ | |
898 | if (old_termios->c_cflag & CRTSCTS && | |
899 | !(tty->termios->c_cflag & CRTSCTS)) { | |
900 | tty->hw_stopped = 0; | |
901 | tx_release(tty); | |
902 | } | |
903 | } | |
904 | ||
905 | /* Send a block of data | |
906 | * | |
907 | * Arguments: | |
908 | * | |
909 | * tty pointer to tty information structure | |
910 | * buf pointer to buffer containing send data | |
911 | * count size of send data in bytes | |
912 | * | |
913 | * Return Value: number of characters written | |
914 | */ | |
915 | static int write(struct tty_struct *tty, | |
916 | const unsigned char *buf, int count) | |
917 | { | |
918 | int c, ret = 0; | |
c9f19e96 | 919 | SLMP_INFO *info = tty->driver_data; |
1da177e4 LT |
920 | unsigned long flags; |
921 | ||
922 | if (debug_level >= DEBUG_LEVEL_INFO) | |
923 | printk("%s(%d):%s write() count=%d\n", | |
924 | __FILE__,__LINE__,info->device_name,count); | |
925 | ||
926 | if (sanity_check(info, tty->name, "write")) | |
927 | goto cleanup; | |
928 | ||
326f28e9 | 929 | if (!info->tx_buf) |
1da177e4 LT |
930 | goto cleanup; |
931 | ||
932 | if (info->params.mode == MGSL_MODE_HDLC) { | |
933 | if (count > info->max_frame_size) { | |
934 | ret = -EIO; | |
935 | goto cleanup; | |
936 | } | |
937 | if (info->tx_active) | |
938 | goto cleanup; | |
939 | if (info->tx_count) { | |
940 | /* send accumulated data from send_char() calls */ | |
941 | /* as frame and wait before accepting more data. */ | |
942 | tx_load_dma_buffer(info, info->tx_buf, info->tx_count); | |
943 | goto start; | |
944 | } | |
945 | ret = info->tx_count = count; | |
946 | tx_load_dma_buffer(info, buf, count); | |
947 | goto start; | |
948 | } | |
949 | ||
950 | for (;;) { | |
951 | c = min_t(int, count, | |
952 | min(info->max_frame_size - info->tx_count - 1, | |
953 | info->max_frame_size - info->tx_put)); | |
954 | if (c <= 0) | |
955 | break; | |
956 | ||
957 | memcpy(info->tx_buf + info->tx_put, buf, c); | |
958 | ||
959 | spin_lock_irqsave(&info->lock,flags); | |
960 | info->tx_put += c; | |
961 | if (info->tx_put >= info->max_frame_size) | |
962 | info->tx_put -= info->max_frame_size; | |
963 | info->tx_count += c; | |
964 | spin_unlock_irqrestore(&info->lock,flags); | |
965 | ||
966 | buf += c; | |
967 | count -= c; | |
968 | ret += c; | |
969 | } | |
970 | ||
971 | if (info->params.mode == MGSL_MODE_HDLC) { | |
972 | if (count) { | |
973 | ret = info->tx_count = 0; | |
974 | goto cleanup; | |
975 | } | |
976 | tx_load_dma_buffer(info, info->tx_buf, info->tx_count); | |
977 | } | |
978 | start: | |
979 | if (info->tx_count && !tty->stopped && !tty->hw_stopped) { | |
980 | spin_lock_irqsave(&info->lock,flags); | |
981 | if (!info->tx_active) | |
982 | tx_start(info); | |
983 | spin_unlock_irqrestore(&info->lock,flags); | |
984 | } | |
985 | ||
986 | cleanup: | |
987 | if (debug_level >= DEBUG_LEVEL_INFO) | |
988 | printk( "%s(%d):%s write() returning=%d\n", | |
989 | __FILE__,__LINE__,info->device_name,ret); | |
990 | return ret; | |
991 | } | |
992 | ||
993 | /* Add a character to the transmit buffer. | |
994 | */ | |
55da7789 | 995 | static int put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 996 | { |
c9f19e96 | 997 | SLMP_INFO *info = tty->driver_data; |
1da177e4 | 998 | unsigned long flags; |
55da7789 | 999 | int ret = 0; |
1da177e4 LT |
1000 | |
1001 | if ( debug_level >= DEBUG_LEVEL_INFO ) { | |
1002 | printk( "%s(%d):%s put_char(%d)\n", | |
1003 | __FILE__,__LINE__,info->device_name,ch); | |
1004 | } | |
1005 | ||
1006 | if (sanity_check(info, tty->name, "put_char")) | |
55da7789 | 1007 | return 0; |
1da177e4 | 1008 | |
326f28e9 | 1009 | if (!info->tx_buf) |
55da7789 | 1010 | return 0; |
1da177e4 LT |
1011 | |
1012 | spin_lock_irqsave(&info->lock,flags); | |
1013 | ||
1014 | if ( (info->params.mode != MGSL_MODE_HDLC) || | |
1015 | !info->tx_active ) { | |
1016 | ||
1017 | if (info->tx_count < info->max_frame_size - 1) { | |
1018 | info->tx_buf[info->tx_put++] = ch; | |
1019 | if (info->tx_put >= info->max_frame_size) | |
1020 | info->tx_put -= info->max_frame_size; | |
1021 | info->tx_count++; | |
55da7789 | 1022 | ret = 1; |
1da177e4 LT |
1023 | } |
1024 | } | |
1025 | ||
1026 | spin_unlock_irqrestore(&info->lock,flags); | |
55da7789 | 1027 | return ret; |
1da177e4 LT |
1028 | } |
1029 | ||
1030 | /* Send a high-priority XON/XOFF character | |
1031 | */ | |
1032 | static void send_xchar(struct tty_struct *tty, char ch) | |
1033 | { | |
c9f19e96 | 1034 | SLMP_INFO *info = tty->driver_data; |
1da177e4 LT |
1035 | unsigned long flags; |
1036 | ||
1037 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1038 | printk("%s(%d):%s send_xchar(%d)\n", | |
1039 | __FILE__,__LINE__, info->device_name, ch ); | |
1040 | ||
1041 | if (sanity_check(info, tty->name, "send_xchar")) | |
1042 | return; | |
1043 | ||
1044 | info->x_char = ch; | |
1045 | if (ch) { | |
1046 | /* Make sure transmit interrupts are on */ | |
1047 | spin_lock_irqsave(&info->lock,flags); | |
1048 | if (!info->tx_enabled) | |
1049 | tx_start(info); | |
1050 | spin_unlock_irqrestore(&info->lock,flags); | |
1051 | } | |
1052 | } | |
1053 | ||
1054 | /* Wait until the transmitter is empty. | |
1055 | */ | |
1056 | static void wait_until_sent(struct tty_struct *tty, int timeout) | |
1057 | { | |
c9f19e96 | 1058 | SLMP_INFO * info = tty->driver_data; |
1da177e4 LT |
1059 | unsigned long orig_jiffies, char_time; |
1060 | ||
1061 | if (!info ) | |
1062 | return; | |
1063 | ||
1064 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1065 | printk("%s(%d):%s wait_until_sent() entry\n", | |
1066 | __FILE__,__LINE__, info->device_name ); | |
1067 | ||
1068 | if (sanity_check(info, tty->name, "wait_until_sent")) | |
1069 | return; | |
1070 | ||
f602501d | 1071 | if (!test_bit(ASYNCB_INITIALIZED, &info->port.flags)) |
1da177e4 LT |
1072 | goto exit; |
1073 | ||
1074 | orig_jiffies = jiffies; | |
1075 | ||
1076 | /* Set check interval to 1/5 of estimated time to | |
1077 | * send a character, and make it at least 1. The check | |
1078 | * interval should also be less than the timeout. | |
1079 | * Note: use tight timings here to satisfy the NIST-PCTS. | |
1080 | */ | |
1081 | ||
1082 | if ( info->params.data_rate ) { | |
1083 | char_time = info->timeout/(32 * 5); | |
1084 | if (!char_time) | |
1085 | char_time++; | |
1086 | } else | |
1087 | char_time = 1; | |
1088 | ||
1089 | if (timeout) | |
1090 | char_time = min_t(unsigned long, char_time, timeout); | |
1091 | ||
1092 | if ( info->params.mode == MGSL_MODE_HDLC ) { | |
1093 | while (info->tx_active) { | |
1094 | msleep_interruptible(jiffies_to_msecs(char_time)); | |
1095 | if (signal_pending(current)) | |
1096 | break; | |
1097 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) | |
1098 | break; | |
1099 | } | |
1100 | } else { | |
f602501d AC |
1101 | /* |
1102 | * TODO: determine if there is something similar to USC16C32 | |
1103 | * TXSTATUS_ALL_SENT status | |
1104 | */ | |
1da177e4 LT |
1105 | while ( info->tx_active && info->tx_enabled) { |
1106 | msleep_interruptible(jiffies_to_msecs(char_time)); | |
1107 | if (signal_pending(current)) | |
1108 | break; | |
1109 | if (timeout && time_after(jiffies, orig_jiffies + timeout)) | |
1110 | break; | |
1111 | } | |
1112 | } | |
1113 | ||
1114 | exit: | |
1115 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1116 | printk("%s(%d):%s wait_until_sent() exit\n", | |
1117 | __FILE__,__LINE__, info->device_name ); | |
1118 | } | |
1119 | ||
1120 | /* Return the count of free bytes in transmit buffer | |
1121 | */ | |
1122 | static int write_room(struct tty_struct *tty) | |
1123 | { | |
c9f19e96 | 1124 | SLMP_INFO *info = tty->driver_data; |
1da177e4 LT |
1125 | int ret; |
1126 | ||
1127 | if (sanity_check(info, tty->name, "write_room")) | |
1128 | return 0; | |
1129 | ||
1130 | if (info->params.mode == MGSL_MODE_HDLC) { | |
1131 | ret = (info->tx_active) ? 0 : HDLC_MAX_FRAME_SIZE; | |
1132 | } else { | |
1133 | ret = info->max_frame_size - info->tx_count - 1; | |
1134 | if (ret < 0) | |
1135 | ret = 0; | |
1136 | } | |
1137 | ||
1138 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1139 | printk("%s(%d):%s write_room()=%d\n", | |
1140 | __FILE__, __LINE__, info->device_name, ret); | |
1141 | ||
1142 | return ret; | |
1143 | } | |
1144 | ||
1145 | /* enable transmitter and send remaining buffered characters | |
1146 | */ | |
1147 | static void flush_chars(struct tty_struct *tty) | |
1148 | { | |
c9f19e96 | 1149 | SLMP_INFO *info = tty->driver_data; |
1da177e4 LT |
1150 | unsigned long flags; |
1151 | ||
1152 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
1153 | printk( "%s(%d):%s flush_chars() entry tx_count=%d\n", | |
1154 | __FILE__,__LINE__,info->device_name,info->tx_count); | |
1155 | ||
1156 | if (sanity_check(info, tty->name, "flush_chars")) | |
1157 | return; | |
1158 | ||
1159 | if (info->tx_count <= 0 || tty->stopped || tty->hw_stopped || | |
1160 | !info->tx_buf) | |
1161 | return; | |
1162 | ||
1163 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
1164 | printk( "%s(%d):%s flush_chars() entry, starting transmitter\n", | |
1165 | __FILE__,__LINE__,info->device_name ); | |
1166 | ||
1167 | spin_lock_irqsave(&info->lock,flags); | |
1168 | ||
1169 | if (!info->tx_active) { | |
1170 | if ( (info->params.mode == MGSL_MODE_HDLC) && | |
1171 | info->tx_count ) { | |
1172 | /* operating in synchronous (frame oriented) mode */ | |
1173 | /* copy data from circular tx_buf to */ | |
1174 | /* transmit DMA buffer. */ | |
1175 | tx_load_dma_buffer(info, | |
1176 | info->tx_buf,info->tx_count); | |
1177 | } | |
1178 | tx_start(info); | |
1179 | } | |
1180 | ||
1181 | spin_unlock_irqrestore(&info->lock,flags); | |
1182 | } | |
1183 | ||
1184 | /* Discard all data in the send buffer | |
1185 | */ | |
1186 | static void flush_buffer(struct tty_struct *tty) | |
1187 | { | |
c9f19e96 | 1188 | SLMP_INFO *info = tty->driver_data; |
1da177e4 LT |
1189 | unsigned long flags; |
1190 | ||
1191 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1192 | printk("%s(%d):%s flush_buffer() entry\n", | |
1193 | __FILE__,__LINE__, info->device_name ); | |
1194 | ||
1195 | if (sanity_check(info, tty->name, "flush_buffer")) | |
1196 | return; | |
1197 | ||
1198 | spin_lock_irqsave(&info->lock,flags); | |
1199 | info->tx_count = info->tx_put = info->tx_get = 0; | |
1200 | del_timer(&info->tx_timer); | |
1201 | spin_unlock_irqrestore(&info->lock,flags); | |
1202 | ||
1da177e4 LT |
1203 | tty_wakeup(tty); |
1204 | } | |
1205 | ||
1206 | /* throttle (stop) transmitter | |
1207 | */ | |
1208 | static void tx_hold(struct tty_struct *tty) | |
1209 | { | |
c9f19e96 | 1210 | SLMP_INFO *info = tty->driver_data; |
1da177e4 LT |
1211 | unsigned long flags; |
1212 | ||
1213 | if (sanity_check(info, tty->name, "tx_hold")) | |
1214 | return; | |
1215 | ||
1216 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
1217 | printk("%s(%d):%s tx_hold()\n", | |
1218 | __FILE__,__LINE__,info->device_name); | |
1219 | ||
1220 | spin_lock_irqsave(&info->lock,flags); | |
1221 | if (info->tx_enabled) | |
1222 | tx_stop(info); | |
1223 | spin_unlock_irqrestore(&info->lock,flags); | |
1224 | } | |
1225 | ||
1226 | /* release (start) transmitter | |
1227 | */ | |
1228 | static void tx_release(struct tty_struct *tty) | |
1229 | { | |
c9f19e96 | 1230 | SLMP_INFO *info = tty->driver_data; |
1da177e4 LT |
1231 | unsigned long flags; |
1232 | ||
1233 | if (sanity_check(info, tty->name, "tx_release")) | |
1234 | return; | |
1235 | ||
1236 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
1237 | printk("%s(%d):%s tx_release()\n", | |
1238 | __FILE__,__LINE__,info->device_name); | |
1239 | ||
1240 | spin_lock_irqsave(&info->lock,flags); | |
1241 | if (!info->tx_enabled) | |
1242 | tx_start(info); | |
1243 | spin_unlock_irqrestore(&info->lock,flags); | |
1244 | } | |
1245 | ||
1246 | /* Service an IOCTL request | |
1247 | * | |
1248 | * Arguments: | |
1249 | * | |
1250 | * tty pointer to tty instance data | |
1251 | * file pointer to associated file object for device | |
1252 | * cmd IOCTL command code | |
1253 | * arg command argument/context | |
1254 | * | |
1255 | * Return Value: 0 if success, otherwise error code | |
1256 | */ | |
f602501d | 1257 | static int ioctl(struct tty_struct *tty, struct file *file, |
1da177e4 LT |
1258 | unsigned int cmd, unsigned long arg) |
1259 | { | |
c9f19e96 | 1260 | SLMP_INFO *info = tty->driver_data; |
1da177e4 LT |
1261 | int error; |
1262 | struct mgsl_icount cnow; /* kernel counter temps */ | |
1263 | struct serial_icounter_struct __user *p_cuser; /* user space */ | |
1264 | unsigned long flags; | |
1265 | void __user *argp = (void __user *)arg; | |
1266 | ||
1267 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1268 | printk("%s(%d):%s ioctl() cmd=%08X\n", __FILE__,__LINE__, | |
1269 | info->device_name, cmd ); | |
1270 | ||
1271 | if (sanity_check(info, tty->name, "ioctl")) | |
1272 | return -ENODEV; | |
1273 | ||
1274 | if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && | |
1275 | (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) { | |
1276 | if (tty->flags & (1 << TTY_IO_ERROR)) | |
1277 | return -EIO; | |
1278 | } | |
1279 | ||
1280 | switch (cmd) { | |
1281 | case MGSL_IOCGPARAMS: | |
1282 | return get_params(info, argp); | |
1283 | case MGSL_IOCSPARAMS: | |
1284 | return set_params(info, argp); | |
1285 | case MGSL_IOCGTXIDLE: | |
1286 | return get_txidle(info, argp); | |
1287 | case MGSL_IOCSTXIDLE: | |
1288 | return set_txidle(info, (int)arg); | |
1289 | case MGSL_IOCTXENABLE: | |
1290 | return tx_enable(info, (int)arg); | |
1291 | case MGSL_IOCRXENABLE: | |
1292 | return rx_enable(info, (int)arg); | |
1293 | case MGSL_IOCTXABORT: | |
1294 | return tx_abort(info); | |
1295 | case MGSL_IOCGSTATS: | |
1296 | return get_stats(info, argp); | |
1297 | case MGSL_IOCWAITEVENT: | |
1298 | return wait_mgsl_event(info, argp); | |
1299 | case MGSL_IOCLOOPTXDONE: | |
1300 | return 0; // TODO: Not supported, need to document | |
1301 | /* Wait for modem input (DCD,RI,DSR,CTS) change | |
1302 | * as specified by mask in arg (TIOCM_RNG/DSR/CD/CTS) | |
1303 | */ | |
1304 | case TIOCMIWAIT: | |
1305 | return modem_input_wait(info,(int)arg); | |
1306 | ||
1307 | /* | |
1308 | * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) | |
1309 | * Return: write counters to the user passed counter struct | |
1310 | * NB: both 1->0 and 0->1 transitions are counted except for | |
1311 | * RI where only 0->1 is counted. | |
1312 | */ | |
1313 | case TIOCGICOUNT: | |
1314 | spin_lock_irqsave(&info->lock,flags); | |
1315 | cnow = info->icount; | |
1316 | spin_unlock_irqrestore(&info->lock,flags); | |
1317 | p_cuser = argp; | |
1318 | PUT_USER(error,cnow.cts, &p_cuser->cts); | |
1319 | if (error) return error; | |
1320 | PUT_USER(error,cnow.dsr, &p_cuser->dsr); | |
1321 | if (error) return error; | |
1322 | PUT_USER(error,cnow.rng, &p_cuser->rng); | |
1323 | if (error) return error; | |
1324 | PUT_USER(error,cnow.dcd, &p_cuser->dcd); | |
1325 | if (error) return error; | |
1326 | PUT_USER(error,cnow.rx, &p_cuser->rx); | |
1327 | if (error) return error; | |
1328 | PUT_USER(error,cnow.tx, &p_cuser->tx); | |
1329 | if (error) return error; | |
1330 | PUT_USER(error,cnow.frame, &p_cuser->frame); | |
1331 | if (error) return error; | |
1332 | PUT_USER(error,cnow.overrun, &p_cuser->overrun); | |
1333 | if (error) return error; | |
1334 | PUT_USER(error,cnow.parity, &p_cuser->parity); | |
1335 | if (error) return error; | |
1336 | PUT_USER(error,cnow.brk, &p_cuser->brk); | |
1337 | if (error) return error; | |
1338 | PUT_USER(error,cnow.buf_overrun, &p_cuser->buf_overrun); | |
1339 | if (error) return error; | |
1340 | return 0; | |
1341 | default: | |
1342 | return -ENOIOCTLCMD; | |
1343 | } | |
1344 | return 0; | |
1345 | } | |
1346 | ||
1347 | /* | |
1348 | * /proc fs routines.... | |
1349 | */ | |
1350 | ||
e6c8dd8a | 1351 | static inline void line_info(struct seq_file *m, SLMP_INFO *info) |
1da177e4 LT |
1352 | { |
1353 | char stat_buf[30]; | |
1da177e4 LT |
1354 | unsigned long flags; |
1355 | ||
e6c8dd8a | 1356 | seq_printf(m, "%s: SCABase=%08x Mem=%08X StatusControl=%08x LCR=%08X\n" |
1da177e4 LT |
1357 | "\tIRQ=%d MaxFrameSize=%u\n", |
1358 | info->device_name, | |
1359 | info->phys_sca_base, | |
1360 | info->phys_memory_base, | |
1361 | info->phys_statctrl_base, | |
1362 | info->phys_lcr_base, | |
1363 | info->irq_level, | |
1364 | info->max_frame_size ); | |
1365 | ||
1366 | /* output current serial signal states */ | |
1367 | spin_lock_irqsave(&info->lock,flags); | |
1368 | get_signals(info); | |
1369 | spin_unlock_irqrestore(&info->lock,flags); | |
1370 | ||
1371 | stat_buf[0] = 0; | |
1372 | stat_buf[1] = 0; | |
1373 | if (info->serial_signals & SerialSignal_RTS) | |
1374 | strcat(stat_buf, "|RTS"); | |
1375 | if (info->serial_signals & SerialSignal_CTS) | |
1376 | strcat(stat_buf, "|CTS"); | |
1377 | if (info->serial_signals & SerialSignal_DTR) | |
1378 | strcat(stat_buf, "|DTR"); | |
1379 | if (info->serial_signals & SerialSignal_DSR) | |
1380 | strcat(stat_buf, "|DSR"); | |
1381 | if (info->serial_signals & SerialSignal_DCD) | |
1382 | strcat(stat_buf, "|CD"); | |
1383 | if (info->serial_signals & SerialSignal_RI) | |
1384 | strcat(stat_buf, "|RI"); | |
1385 | ||
1386 | if (info->params.mode == MGSL_MODE_HDLC) { | |
e6c8dd8a | 1387 | seq_printf(m, "\tHDLC txok:%d rxok:%d", |
1da177e4 LT |
1388 | info->icount.txok, info->icount.rxok); |
1389 | if (info->icount.txunder) | |
e6c8dd8a | 1390 | seq_printf(m, " txunder:%d", info->icount.txunder); |
1da177e4 | 1391 | if (info->icount.txabort) |
e6c8dd8a | 1392 | seq_printf(m, " txabort:%d", info->icount.txabort); |
1da177e4 | 1393 | if (info->icount.rxshort) |
e6c8dd8a | 1394 | seq_printf(m, " rxshort:%d", info->icount.rxshort); |
1da177e4 | 1395 | if (info->icount.rxlong) |
e6c8dd8a | 1396 | seq_printf(m, " rxlong:%d", info->icount.rxlong); |
1da177e4 | 1397 | if (info->icount.rxover) |
e6c8dd8a | 1398 | seq_printf(m, " rxover:%d", info->icount.rxover); |
1da177e4 | 1399 | if (info->icount.rxcrc) |
e6c8dd8a | 1400 | seq_printf(m, " rxlong:%d", info->icount.rxcrc); |
1da177e4 | 1401 | } else { |
e6c8dd8a | 1402 | seq_printf(m, "\tASYNC tx:%d rx:%d", |
1da177e4 LT |
1403 | info->icount.tx, info->icount.rx); |
1404 | if (info->icount.frame) | |
e6c8dd8a | 1405 | seq_printf(m, " fe:%d", info->icount.frame); |
1da177e4 | 1406 | if (info->icount.parity) |
e6c8dd8a | 1407 | seq_printf(m, " pe:%d", info->icount.parity); |
1da177e4 | 1408 | if (info->icount.brk) |
e6c8dd8a | 1409 | seq_printf(m, " brk:%d", info->icount.brk); |
1da177e4 | 1410 | if (info->icount.overrun) |
e6c8dd8a | 1411 | seq_printf(m, " oe:%d", info->icount.overrun); |
1da177e4 LT |
1412 | } |
1413 | ||
1414 | /* Append serial signal status to end */ | |
e6c8dd8a | 1415 | seq_printf(m, " %s\n", stat_buf+1); |
1da177e4 | 1416 | |
e6c8dd8a | 1417 | seq_printf(m, "\ttxactive=%d bh_req=%d bh_run=%d pending_bh=%x\n", |
1da177e4 LT |
1418 | info->tx_active,info->bh_requested,info->bh_running, |
1419 | info->pending_bh); | |
1da177e4 LT |
1420 | } |
1421 | ||
1422 | /* Called to print information about devices | |
1423 | */ | |
e6c8dd8a | 1424 | static int synclinkmp_proc_show(struct seq_file *m, void *v) |
1da177e4 | 1425 | { |
1da177e4 LT |
1426 | SLMP_INFO *info; |
1427 | ||
e6c8dd8a | 1428 | seq_printf(m, "synclinkmp driver:%s\n", driver_version); |
1da177e4 LT |
1429 | |
1430 | info = synclinkmp_device_list; | |
1431 | while( info ) { | |
e6c8dd8a | 1432 | line_info(m, info); |
1da177e4 LT |
1433 | info = info->next_device; |
1434 | } | |
e6c8dd8a AD |
1435 | return 0; |
1436 | } | |
1da177e4 | 1437 | |
e6c8dd8a AD |
1438 | static int synclinkmp_proc_open(struct inode *inode, struct file *file) |
1439 | { | |
1440 | return single_open(file, synclinkmp_proc_show, NULL); | |
1da177e4 LT |
1441 | } |
1442 | ||
e6c8dd8a AD |
1443 | static const struct file_operations synclinkmp_proc_fops = { |
1444 | .owner = THIS_MODULE, | |
1445 | .open = synclinkmp_proc_open, | |
1446 | .read = seq_read, | |
1447 | .llseek = seq_lseek, | |
1448 | .release = single_release, | |
1449 | }; | |
1450 | ||
1da177e4 LT |
1451 | /* Return the count of bytes in transmit buffer |
1452 | */ | |
1453 | static int chars_in_buffer(struct tty_struct *tty) | |
1454 | { | |
c9f19e96 | 1455 | SLMP_INFO *info = tty->driver_data; |
1da177e4 LT |
1456 | |
1457 | if (sanity_check(info, tty->name, "chars_in_buffer")) | |
1458 | return 0; | |
1459 | ||
1460 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1461 | printk("%s(%d):%s chars_in_buffer()=%d\n", | |
1462 | __FILE__, __LINE__, info->device_name, info->tx_count); | |
1463 | ||
1464 | return info->tx_count; | |
1465 | } | |
1466 | ||
1467 | /* Signal remote device to throttle send data (our receive data) | |
1468 | */ | |
1469 | static void throttle(struct tty_struct * tty) | |
1470 | { | |
c9f19e96 | 1471 | SLMP_INFO *info = tty->driver_data; |
1da177e4 LT |
1472 | unsigned long flags; |
1473 | ||
1474 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1475 | printk("%s(%d):%s throttle() entry\n", | |
1476 | __FILE__,__LINE__, info->device_name ); | |
1477 | ||
1478 | if (sanity_check(info, tty->name, "throttle")) | |
1479 | return; | |
1480 | ||
1481 | if (I_IXOFF(tty)) | |
1482 | send_xchar(tty, STOP_CHAR(tty)); | |
1483 | ||
1484 | if (tty->termios->c_cflag & CRTSCTS) { | |
1485 | spin_lock_irqsave(&info->lock,flags); | |
1486 | info->serial_signals &= ~SerialSignal_RTS; | |
1487 | set_signals(info); | |
1488 | spin_unlock_irqrestore(&info->lock,flags); | |
1489 | } | |
1490 | } | |
1491 | ||
1492 | /* Signal remote device to stop throttling send data (our receive data) | |
1493 | */ | |
1494 | static void unthrottle(struct tty_struct * tty) | |
1495 | { | |
c9f19e96 | 1496 | SLMP_INFO *info = tty->driver_data; |
1da177e4 LT |
1497 | unsigned long flags; |
1498 | ||
1499 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1500 | printk("%s(%d):%s unthrottle() entry\n", | |
1501 | __FILE__,__LINE__, info->device_name ); | |
1502 | ||
1503 | if (sanity_check(info, tty->name, "unthrottle")) | |
1504 | return; | |
1505 | ||
1506 | if (I_IXOFF(tty)) { | |
1507 | if (info->x_char) | |
1508 | info->x_char = 0; | |
1509 | else | |
1510 | send_xchar(tty, START_CHAR(tty)); | |
1511 | } | |
1512 | ||
1513 | if (tty->termios->c_cflag & CRTSCTS) { | |
1514 | spin_lock_irqsave(&info->lock,flags); | |
1515 | info->serial_signals |= SerialSignal_RTS; | |
1516 | set_signals(info); | |
1517 | spin_unlock_irqrestore(&info->lock,flags); | |
1518 | } | |
1519 | } | |
1520 | ||
1521 | /* set or clear transmit break condition | |
1522 | * break_state -1=set break condition, 0=clear | |
1523 | */ | |
9e98966c | 1524 | static int set_break(struct tty_struct *tty, int break_state) |
1da177e4 LT |
1525 | { |
1526 | unsigned char RegValue; | |
c9f19e96 | 1527 | SLMP_INFO * info = tty->driver_data; |
1da177e4 LT |
1528 | unsigned long flags; |
1529 | ||
1530 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1531 | printk("%s(%d):%s set_break(%d)\n", | |
1532 | __FILE__,__LINE__, info->device_name, break_state); | |
1533 | ||
1534 | if (sanity_check(info, tty->name, "set_break")) | |
9e98966c | 1535 | return -EINVAL; |
1da177e4 LT |
1536 | |
1537 | spin_lock_irqsave(&info->lock,flags); | |
1538 | RegValue = read_reg(info, CTL); | |
1539 | if (break_state == -1) | |
1540 | RegValue |= BIT3; | |
1541 | else | |
1542 | RegValue &= ~BIT3; | |
1543 | write_reg(info, CTL, RegValue); | |
1544 | spin_unlock_irqrestore(&info->lock,flags); | |
9e98966c | 1545 | return 0; |
1da177e4 LT |
1546 | } |
1547 | ||
af69c7f9 | 1548 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
1549 | |
1550 | /** | |
1551 | * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.) | |
1552 | * set encoding and frame check sequence (FCS) options | |
1553 | * | |
1554 | * dev pointer to network device structure | |
1555 | * encoding serial encoding setting | |
1556 | * parity FCS setting | |
1557 | * | |
1558 | * returns 0 if success, otherwise error code | |
1559 | */ | |
1560 | static int hdlcdev_attach(struct net_device *dev, unsigned short encoding, | |
1561 | unsigned short parity) | |
1562 | { | |
1563 | SLMP_INFO *info = dev_to_port(dev); | |
1564 | unsigned char new_encoding; | |
1565 | unsigned short new_crctype; | |
1566 | ||
1567 | /* return error if TTY interface open */ | |
8fb06c77 | 1568 | if (info->port.count) |
1da177e4 LT |
1569 | return -EBUSY; |
1570 | ||
1571 | switch (encoding) | |
1572 | { | |
1573 | case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break; | |
1574 | case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break; | |
1575 | case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break; | |
1576 | case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break; | |
1577 | case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break; | |
1578 | default: return -EINVAL; | |
1579 | } | |
1580 | ||
1581 | switch (parity) | |
1582 | { | |
1583 | case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break; | |
1584 | case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break; | |
1585 | case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break; | |
1586 | default: return -EINVAL; | |
1587 | } | |
1588 | ||
1589 | info->params.encoding = new_encoding; | |
53b3531b | 1590 | info->params.crc_type = new_crctype; |
1da177e4 LT |
1591 | |
1592 | /* if network interface up, reprogram hardware */ | |
1593 | if (info->netcount) | |
1594 | program_hw(info); | |
1595 | ||
1596 | return 0; | |
1597 | } | |
1598 | ||
1599 | /** | |
1600 | * called by generic HDLC layer to send frame | |
1601 | * | |
1602 | * skb socket buffer containing HDLC frame | |
1603 | * dev pointer to network device structure | |
1da177e4 | 1604 | */ |
4c5d502d SH |
1605 | static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb, |
1606 | struct net_device *dev) | |
1da177e4 LT |
1607 | { |
1608 | SLMP_INFO *info = dev_to_port(dev); | |
1da177e4 LT |
1609 | unsigned long flags; |
1610 | ||
1611 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1612 | printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name); | |
1613 | ||
1614 | /* stop sending until this frame completes */ | |
1615 | netif_stop_queue(dev); | |
1616 | ||
1617 | /* copy data to device buffers */ | |
1618 | info->tx_count = skb->len; | |
1619 | tx_load_dma_buffer(info, skb->data, skb->len); | |
1620 | ||
1621 | /* update network statistics */ | |
198191c4 KH |
1622 | dev->stats.tx_packets++; |
1623 | dev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
1624 | |
1625 | /* done with socket buffer, so free it */ | |
1626 | dev_kfree_skb(skb); | |
1627 | ||
1628 | /* save start time for transmit timeout detection */ | |
1629 | dev->trans_start = jiffies; | |
1630 | ||
1631 | /* start hardware transmitter if necessary */ | |
1632 | spin_lock_irqsave(&info->lock,flags); | |
1633 | if (!info->tx_active) | |
1634 | tx_start(info); | |
1635 | spin_unlock_irqrestore(&info->lock,flags); | |
1636 | ||
4c5d502d | 1637 | return NETDEV_TX_OK; |
1da177e4 LT |
1638 | } |
1639 | ||
1640 | /** | |
1641 | * called by network layer when interface enabled | |
1642 | * claim resources and initialize hardware | |
1643 | * | |
1644 | * dev pointer to network device structure | |
1645 | * | |
1646 | * returns 0 if success, otherwise error code | |
1647 | */ | |
1648 | static int hdlcdev_open(struct net_device *dev) | |
1649 | { | |
1650 | SLMP_INFO *info = dev_to_port(dev); | |
1651 | int rc; | |
1652 | unsigned long flags; | |
1653 | ||
1654 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1655 | printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name); | |
1656 | ||
1657 | /* generic HDLC layer open processing */ | |
1658 | if ((rc = hdlc_open(dev))) | |
1659 | return rc; | |
1660 | ||
1661 | /* arbitrate between network and tty opens */ | |
1662 | spin_lock_irqsave(&info->netlock, flags); | |
8fb06c77 | 1663 | if (info->port.count != 0 || info->netcount != 0) { |
1da177e4 LT |
1664 | printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name); |
1665 | spin_unlock_irqrestore(&info->netlock, flags); | |
1666 | return -EBUSY; | |
1667 | } | |
1668 | info->netcount=1; | |
1669 | spin_unlock_irqrestore(&info->netlock, flags); | |
1670 | ||
1671 | /* claim resources and init adapter */ | |
1672 | if ((rc = startup(info)) != 0) { | |
1673 | spin_lock_irqsave(&info->netlock, flags); | |
1674 | info->netcount=0; | |
1675 | spin_unlock_irqrestore(&info->netlock, flags); | |
1676 | return rc; | |
1677 | } | |
1678 | ||
1679 | /* assert DTR and RTS, apply hardware settings */ | |
1680 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; | |
1681 | program_hw(info); | |
1682 | ||
1683 | /* enable network layer transmit */ | |
1684 | dev->trans_start = jiffies; | |
1685 | netif_start_queue(dev); | |
1686 | ||
1687 | /* inform generic HDLC layer of current DCD status */ | |
1688 | spin_lock_irqsave(&info->lock, flags); | |
1689 | get_signals(info); | |
1690 | spin_unlock_irqrestore(&info->lock, flags); | |
fbeff3c1 KH |
1691 | if (info->serial_signals & SerialSignal_DCD) |
1692 | netif_carrier_on(dev); | |
1693 | else | |
1694 | netif_carrier_off(dev); | |
1da177e4 LT |
1695 | return 0; |
1696 | } | |
1697 | ||
1698 | /** | |
1699 | * called by network layer when interface is disabled | |
1700 | * shutdown hardware and release resources | |
1701 | * | |
1702 | * dev pointer to network device structure | |
1703 | * | |
1704 | * returns 0 if success, otherwise error code | |
1705 | */ | |
1706 | static int hdlcdev_close(struct net_device *dev) | |
1707 | { | |
1708 | SLMP_INFO *info = dev_to_port(dev); | |
1709 | unsigned long flags; | |
1710 | ||
1711 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1712 | printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name); | |
1713 | ||
1714 | netif_stop_queue(dev); | |
1715 | ||
1716 | /* shutdown adapter and release resources */ | |
1717 | shutdown(info); | |
1718 | ||
1719 | hdlc_close(dev); | |
1720 | ||
1721 | spin_lock_irqsave(&info->netlock, flags); | |
1722 | info->netcount=0; | |
1723 | spin_unlock_irqrestore(&info->netlock, flags); | |
1724 | ||
1725 | return 0; | |
1726 | } | |
1727 | ||
1728 | /** | |
1729 | * called by network layer to process IOCTL call to network device | |
1730 | * | |
1731 | * dev pointer to network device structure | |
1732 | * ifr pointer to network interface request structure | |
1733 | * cmd IOCTL command code | |
1734 | * | |
1735 | * returns 0 if success, otherwise error code | |
1736 | */ | |
1737 | static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
1738 | { | |
1739 | const size_t size = sizeof(sync_serial_settings); | |
1740 | sync_serial_settings new_line; | |
1741 | sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync; | |
1742 | SLMP_INFO *info = dev_to_port(dev); | |
1743 | unsigned int flags; | |
1744 | ||
1745 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1746 | printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name); | |
1747 | ||
1748 | /* return error if TTY interface open */ | |
8fb06c77 | 1749 | if (info->port.count) |
1da177e4 LT |
1750 | return -EBUSY; |
1751 | ||
1752 | if (cmd != SIOCWANDEV) | |
1753 | return hdlc_ioctl(dev, ifr, cmd); | |
1754 | ||
1755 | switch(ifr->ifr_settings.type) { | |
1756 | case IF_GET_IFACE: /* return current sync_serial_settings */ | |
1757 | ||
1758 | ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL; | |
1759 | if (ifr->ifr_settings.size < size) { | |
1760 | ifr->ifr_settings.size = size; /* data size wanted */ | |
1761 | return -ENOBUFS; | |
1762 | } | |
1763 | ||
1764 | flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | | |
1765 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | | |
1766 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | | |
1767 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); | |
1768 | ||
1769 | switch (flags){ | |
1770 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break; | |
1771 | case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break; | |
1772 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break; | |
1773 | case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break; | |
1774 | default: new_line.clock_type = CLOCK_DEFAULT; | |
1775 | } | |
1776 | ||
1777 | new_line.clock_rate = info->params.clock_speed; | |
1778 | new_line.loopback = info->params.loopback ? 1:0; | |
1779 | ||
1780 | if (copy_to_user(line, &new_line, size)) | |
1781 | return -EFAULT; | |
1782 | return 0; | |
1783 | ||
1784 | case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */ | |
1785 | ||
1786 | if(!capable(CAP_NET_ADMIN)) | |
1787 | return -EPERM; | |
1788 | if (copy_from_user(&new_line, line, size)) | |
1789 | return -EFAULT; | |
1790 | ||
1791 | switch (new_line.clock_type) | |
1792 | { | |
1793 | case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break; | |
1794 | case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break; | |
1795 | case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break; | |
1796 | case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break; | |
1797 | case CLOCK_DEFAULT: flags = info->params.flags & | |
1798 | (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | | |
1799 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | | |
1800 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | | |
1801 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break; | |
1802 | default: return -EINVAL; | |
1803 | } | |
1804 | ||
1805 | if (new_line.loopback != 0 && new_line.loopback != 1) | |
1806 | return -EINVAL; | |
1807 | ||
1808 | info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | | |
1809 | HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | | |
1810 | HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | | |
1811 | HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); | |
1812 | info->params.flags |= flags; | |
1813 | ||
1814 | info->params.loopback = new_line.loopback; | |
1815 | ||
1816 | if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG)) | |
1817 | info->params.clock_speed = new_line.clock_rate; | |
1818 | else | |
1819 | info->params.clock_speed = 0; | |
1820 | ||
1821 | /* if network interface up, reprogram hardware */ | |
1822 | if (info->netcount) | |
1823 | program_hw(info); | |
1824 | return 0; | |
1825 | ||
1826 | default: | |
1827 | return hdlc_ioctl(dev, ifr, cmd); | |
1828 | } | |
1829 | } | |
1830 | ||
1831 | /** | |
1832 | * called by network layer when transmit timeout is detected | |
1833 | * | |
1834 | * dev pointer to network device structure | |
1835 | */ | |
1836 | static void hdlcdev_tx_timeout(struct net_device *dev) | |
1837 | { | |
1838 | SLMP_INFO *info = dev_to_port(dev); | |
1da177e4 LT |
1839 | unsigned long flags; |
1840 | ||
1841 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1842 | printk("hdlcdev_tx_timeout(%s)\n",dev->name); | |
1843 | ||
198191c4 KH |
1844 | dev->stats.tx_errors++; |
1845 | dev->stats.tx_aborted_errors++; | |
1da177e4 LT |
1846 | |
1847 | spin_lock_irqsave(&info->lock,flags); | |
1848 | tx_stop(info); | |
1849 | spin_unlock_irqrestore(&info->lock,flags); | |
1850 | ||
1851 | netif_wake_queue(dev); | |
1852 | } | |
1853 | ||
1854 | /** | |
1855 | * called by device driver when transmit completes | |
1856 | * reenable network layer transmit if stopped | |
1857 | * | |
1858 | * info pointer to device instance information | |
1859 | */ | |
1860 | static void hdlcdev_tx_done(SLMP_INFO *info) | |
1861 | { | |
1862 | if (netif_queue_stopped(info->netdev)) | |
1863 | netif_wake_queue(info->netdev); | |
1864 | } | |
1865 | ||
1866 | /** | |
1867 | * called by device driver when frame received | |
1868 | * pass frame to network layer | |
1869 | * | |
1870 | * info pointer to device instance information | |
1871 | * buf pointer to buffer contianing frame data | |
1872 | * size count of data bytes in buf | |
1873 | */ | |
1874 | static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size) | |
1875 | { | |
1876 | struct sk_buff *skb = dev_alloc_skb(size); | |
1877 | struct net_device *dev = info->netdev; | |
1da177e4 LT |
1878 | |
1879 | if (debug_level >= DEBUG_LEVEL_INFO) | |
1880 | printk("hdlcdev_rx(%s)\n",dev->name); | |
1881 | ||
1882 | if (skb == NULL) { | |
198191c4 KH |
1883 | printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", |
1884 | dev->name); | |
1885 | dev->stats.rx_dropped++; | |
1da177e4 LT |
1886 | return; |
1887 | } | |
1888 | ||
198191c4 | 1889 | memcpy(skb_put(skb, size), buf, size); |
1da177e4 | 1890 | |
198191c4 | 1891 | skb->protocol = hdlc_type_trans(skb, dev); |
1da177e4 | 1892 | |
198191c4 KH |
1893 | dev->stats.rx_packets++; |
1894 | dev->stats.rx_bytes += size; | |
1da177e4 LT |
1895 | |
1896 | netif_rx(skb); | |
1da177e4 LT |
1897 | } |
1898 | ||
991990a1 KH |
1899 | static const struct net_device_ops hdlcdev_ops = { |
1900 | .ndo_open = hdlcdev_open, | |
1901 | .ndo_stop = hdlcdev_close, | |
1902 | .ndo_change_mtu = hdlc_change_mtu, | |
1903 | .ndo_start_xmit = hdlc_start_xmit, | |
1904 | .ndo_do_ioctl = hdlcdev_ioctl, | |
1905 | .ndo_tx_timeout = hdlcdev_tx_timeout, | |
1906 | }; | |
1907 | ||
1da177e4 LT |
1908 | /** |
1909 | * called by device driver when adding device instance | |
1910 | * do generic HDLC initialization | |
1911 | * | |
1912 | * info pointer to device instance information | |
1913 | * | |
1914 | * returns 0 if success, otherwise error code | |
1915 | */ | |
1916 | static int hdlcdev_init(SLMP_INFO *info) | |
1917 | { | |
1918 | int rc; | |
1919 | struct net_device *dev; | |
1920 | hdlc_device *hdlc; | |
1921 | ||
1922 | /* allocate and initialize network and HDLC layer objects */ | |
1923 | ||
1924 | if (!(dev = alloc_hdlcdev(info))) { | |
1925 | printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__); | |
1926 | return -ENOMEM; | |
1927 | } | |
1928 | ||
1929 | /* for network layer reporting purposes only */ | |
1930 | dev->mem_start = info->phys_sca_base; | |
1931 | dev->mem_end = info->phys_sca_base + SCA_BASE_SIZE - 1; | |
1932 | dev->irq = info->irq_level; | |
1933 | ||
1934 | /* network layer callbacks and settings */ | |
991990a1 KH |
1935 | dev->netdev_ops = &hdlcdev_ops; |
1936 | dev->watchdog_timeo = 10 * HZ; | |
1da177e4 LT |
1937 | dev->tx_queue_len = 50; |
1938 | ||
1939 | /* generic HDLC layer callbacks and settings */ | |
1940 | hdlc = dev_to_hdlc(dev); | |
1941 | hdlc->attach = hdlcdev_attach; | |
1942 | hdlc->xmit = hdlcdev_xmit; | |
1943 | ||
1944 | /* register objects with HDLC layer */ | |
1945 | if ((rc = register_hdlc_device(dev))) { | |
1946 | printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__); | |
1947 | free_netdev(dev); | |
1948 | return rc; | |
1949 | } | |
1950 | ||
1951 | info->netdev = dev; | |
1952 | return 0; | |
1953 | } | |
1954 | ||
1955 | /** | |
1956 | * called by device driver when removing device instance | |
1957 | * do generic HDLC cleanup | |
1958 | * | |
1959 | * info pointer to device instance information | |
1960 | */ | |
1961 | static void hdlcdev_exit(SLMP_INFO *info) | |
1962 | { | |
1963 | unregister_hdlc_device(info->netdev); | |
1964 | free_netdev(info->netdev); | |
1965 | info->netdev = NULL; | |
1966 | } | |
1967 | ||
1968 | #endif /* CONFIG_HDLC */ | |
1969 | ||
1970 | ||
1971 | /* Return next bottom half action to perform. | |
1972 | * Return Value: BH action code or 0 if nothing to do. | |
1973 | */ | |
ce9f9f73 | 1974 | static int bh_action(SLMP_INFO *info) |
1da177e4 LT |
1975 | { |
1976 | unsigned long flags; | |
1977 | int rc = 0; | |
1978 | ||
1979 | spin_lock_irqsave(&info->lock,flags); | |
1980 | ||
1981 | if (info->pending_bh & BH_RECEIVE) { | |
1982 | info->pending_bh &= ~BH_RECEIVE; | |
1983 | rc = BH_RECEIVE; | |
1984 | } else if (info->pending_bh & BH_TRANSMIT) { | |
1985 | info->pending_bh &= ~BH_TRANSMIT; | |
1986 | rc = BH_TRANSMIT; | |
1987 | } else if (info->pending_bh & BH_STATUS) { | |
1988 | info->pending_bh &= ~BH_STATUS; | |
1989 | rc = BH_STATUS; | |
1990 | } | |
1991 | ||
1992 | if (!rc) { | |
1993 | /* Mark BH routine as complete */ | |
0fab6de0 JP |
1994 | info->bh_running = false; |
1995 | info->bh_requested = false; | |
1da177e4 LT |
1996 | } |
1997 | ||
1998 | spin_unlock_irqrestore(&info->lock,flags); | |
1999 | ||
2000 | return rc; | |
2001 | } | |
2002 | ||
2003 | /* Perform bottom half processing of work items queued by ISR. | |
2004 | */ | |
ce9f9f73 | 2005 | static void bh_handler(struct work_struct *work) |
1da177e4 | 2006 | { |
c4028958 | 2007 | SLMP_INFO *info = container_of(work, SLMP_INFO, task); |
1da177e4 LT |
2008 | int action; |
2009 | ||
2010 | if (!info) | |
2011 | return; | |
2012 | ||
2013 | if ( debug_level >= DEBUG_LEVEL_BH ) | |
2014 | printk( "%s(%d):%s bh_handler() entry\n", | |
2015 | __FILE__,__LINE__,info->device_name); | |
2016 | ||
0fab6de0 | 2017 | info->bh_running = true; |
1da177e4 LT |
2018 | |
2019 | while((action = bh_action(info)) != 0) { | |
2020 | ||
2021 | /* Process work item */ | |
2022 | if ( debug_level >= DEBUG_LEVEL_BH ) | |
2023 | printk( "%s(%d):%s bh_handler() work item action=%d\n", | |
2024 | __FILE__,__LINE__,info->device_name, action); | |
2025 | ||
2026 | switch (action) { | |
2027 | ||
2028 | case BH_RECEIVE: | |
2029 | bh_receive(info); | |
2030 | break; | |
2031 | case BH_TRANSMIT: | |
2032 | bh_transmit(info); | |
2033 | break; | |
2034 | case BH_STATUS: | |
2035 | bh_status(info); | |
2036 | break; | |
2037 | default: | |
2038 | /* unknown work item ID */ | |
2039 | printk("%s(%d):%s Unknown work item ID=%08X!\n", | |
2040 | __FILE__,__LINE__,info->device_name,action); | |
2041 | break; | |
2042 | } | |
2043 | } | |
2044 | ||
2045 | if ( debug_level >= DEBUG_LEVEL_BH ) | |
2046 | printk( "%s(%d):%s bh_handler() exit\n", | |
2047 | __FILE__,__LINE__,info->device_name); | |
2048 | } | |
2049 | ||
ce9f9f73 | 2050 | static void bh_receive(SLMP_INFO *info) |
1da177e4 LT |
2051 | { |
2052 | if ( debug_level >= DEBUG_LEVEL_BH ) | |
2053 | printk( "%s(%d):%s bh_receive()\n", | |
2054 | __FILE__,__LINE__,info->device_name); | |
2055 | ||
2056 | while( rx_get_frame(info) ); | |
2057 | } | |
2058 | ||
ce9f9f73 | 2059 | static void bh_transmit(SLMP_INFO *info) |
1da177e4 | 2060 | { |
8fb06c77 | 2061 | struct tty_struct *tty = info->port.tty; |
1da177e4 LT |
2062 | |
2063 | if ( debug_level >= DEBUG_LEVEL_BH ) | |
2064 | printk( "%s(%d):%s bh_transmit() entry\n", | |
2065 | __FILE__,__LINE__,info->device_name); | |
2066 | ||
b963a844 | 2067 | if (tty) |
1da177e4 | 2068 | tty_wakeup(tty); |
1da177e4 LT |
2069 | } |
2070 | ||
ce9f9f73 | 2071 | static void bh_status(SLMP_INFO *info) |
1da177e4 LT |
2072 | { |
2073 | if ( debug_level >= DEBUG_LEVEL_BH ) | |
2074 | printk( "%s(%d):%s bh_status() entry\n", | |
2075 | __FILE__,__LINE__,info->device_name); | |
2076 | ||
2077 | info->ri_chkcount = 0; | |
2078 | info->dsr_chkcount = 0; | |
2079 | info->dcd_chkcount = 0; | |
2080 | info->cts_chkcount = 0; | |
2081 | } | |
2082 | ||
ce9f9f73 | 2083 | static void isr_timer(SLMP_INFO * info) |
1da177e4 LT |
2084 | { |
2085 | unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0; | |
2086 | ||
2087 | /* IER2<7..4> = timer<3..0> interrupt enables (0=disabled) */ | |
2088 | write_reg(info, IER2, 0); | |
2089 | ||
2090 | /* TMCS, Timer Control/Status Register | |
2091 | * | |
2092 | * 07 CMF, Compare match flag (read only) 1=match | |
2093 | * 06 ECMI, CMF Interrupt Enable: 0=disabled | |
2094 | * 05 Reserved, must be 0 | |
2095 | * 04 TME, Timer Enable | |
2096 | * 03..00 Reserved, must be 0 | |
2097 | * | |
2098 | * 0000 0000 | |
2099 | */ | |
2100 | write_reg(info, (unsigned char)(timer + TMCS), 0); | |
2101 | ||
0fab6de0 | 2102 | info->irq_occurred = true; |
1da177e4 LT |
2103 | |
2104 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
2105 | printk("%s(%d):%s isr_timer()\n", | |
2106 | __FILE__,__LINE__,info->device_name); | |
2107 | } | |
2108 | ||
ce9f9f73 | 2109 | static void isr_rxint(SLMP_INFO * info) |
1da177e4 | 2110 | { |
8fb06c77 | 2111 | struct tty_struct *tty = info->port.tty; |
1da177e4 LT |
2112 | struct mgsl_icount *icount = &info->icount; |
2113 | unsigned char status = read_reg(info, SR1) & info->ie1_value & (FLGD + IDLD + CDCD + BRKD); | |
2114 | unsigned char status2 = read_reg(info, SR2) & info->ie2_value & OVRN; | |
2115 | ||
2116 | /* clear status bits */ | |
2117 | if (status) | |
2118 | write_reg(info, SR1, status); | |
2119 | ||
2120 | if (status2) | |
2121 | write_reg(info, SR2, status2); | |
2122 | ||
2123 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
2124 | printk("%s(%d):%s isr_rxint status=%02X %02x\n", | |
2125 | __FILE__,__LINE__,info->device_name,status,status2); | |
2126 | ||
2127 | if (info->params.mode == MGSL_MODE_ASYNC) { | |
2128 | if (status & BRKD) { | |
2129 | icount->brk++; | |
2130 | ||
2131 | /* process break detection if tty control | |
2132 | * is not set to ignore it | |
2133 | */ | |
2134 | if ( tty ) { | |
2135 | if (!(status & info->ignore_status_mask1)) { | |
2136 | if (info->read_status_mask1 & BRKD) { | |
33f0f88f | 2137 | tty_insert_flip_char(tty, 0, TTY_BREAK); |
8fb06c77 | 2138 | if (info->port.flags & ASYNC_SAK) |
1da177e4 LT |
2139 | do_SAK(tty); |
2140 | } | |
2141 | } | |
2142 | } | |
2143 | } | |
2144 | } | |
2145 | else { | |
2146 | if (status & (FLGD|IDLD)) { | |
2147 | if (status & FLGD) | |
2148 | info->icount.exithunt++; | |
2149 | else if (status & IDLD) | |
2150 | info->icount.rxidle++; | |
2151 | wake_up_interruptible(&info->event_wait_q); | |
2152 | } | |
2153 | } | |
2154 | ||
2155 | if (status & CDCD) { | |
2156 | /* simulate a common modem status change interrupt | |
2157 | * for our handler | |
2158 | */ | |
2159 | get_signals( info ); | |
2160 | isr_io_pin(info, | |
2161 | MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD)); | |
2162 | } | |
2163 | } | |
2164 | ||
2165 | /* | |
2166 | * handle async rx data interrupts | |
2167 | */ | |
ce9f9f73 | 2168 | static void isr_rxrdy(SLMP_INFO * info) |
1da177e4 LT |
2169 | { |
2170 | u16 status; | |
2171 | unsigned char DataByte; | |
8fb06c77 | 2172 | struct tty_struct *tty = info->port.tty; |
1da177e4 LT |
2173 | struct mgsl_icount *icount = &info->icount; |
2174 | ||
2175 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
2176 | printk("%s(%d):%s isr_rxrdy\n", | |
2177 | __FILE__,__LINE__,info->device_name); | |
2178 | ||
2179 | while((status = read_reg(info,CST0)) & BIT0) | |
2180 | { | |
33f0f88f | 2181 | int flag = 0; |
0fab6de0 | 2182 | bool over = false; |
1da177e4 LT |
2183 | DataByte = read_reg(info,TRB); |
2184 | ||
1da177e4 LT |
2185 | icount->rx++; |
2186 | ||
2187 | if ( status & (PE + FRME + OVRN) ) { | |
2188 | printk("%s(%d):%s rxerr=%04X\n", | |
2189 | __FILE__,__LINE__,info->device_name,status); | |
2190 | ||
2191 | /* update error statistics */ | |
2192 | if (status & PE) | |
2193 | icount->parity++; | |
2194 | else if (status & FRME) | |
2195 | icount->frame++; | |
2196 | else if (status & OVRN) | |
2197 | icount->overrun++; | |
2198 | ||
2199 | /* discard char if tty control flags say so */ | |
2200 | if (status & info->ignore_status_mask2) | |
2201 | continue; | |
2202 | ||
2203 | status &= info->read_status_mask2; | |
2204 | ||
2205 | if ( tty ) { | |
2206 | if (status & PE) | |
33f0f88f | 2207 | flag = TTY_PARITY; |
1da177e4 | 2208 | else if (status & FRME) |
33f0f88f | 2209 | flag = TTY_FRAME; |
1da177e4 LT |
2210 | if (status & OVRN) { |
2211 | /* Overrun is special, since it's | |
2212 | * reported immediately, and doesn't | |
2213 | * affect the current character | |
2214 | */ | |
0fab6de0 | 2215 | over = true; |
1da177e4 LT |
2216 | } |
2217 | } | |
2218 | } /* end of if (error) */ | |
2219 | ||
2220 | if ( tty ) { | |
33f0f88f AC |
2221 | tty_insert_flip_char(tty, DataByte, flag); |
2222 | if (over) | |
2223 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); | |
1da177e4 LT |
2224 | } |
2225 | } | |
2226 | ||
2227 | if ( debug_level >= DEBUG_LEVEL_ISR ) { | |
1da177e4 LT |
2228 | printk("%s(%d):%s rx=%d brk=%d parity=%d frame=%d overrun=%d\n", |
2229 | __FILE__,__LINE__,info->device_name, | |
2230 | icount->rx,icount->brk,icount->parity, | |
2231 | icount->frame,icount->overrun); | |
2232 | } | |
2233 | ||
33f0f88f | 2234 | if ( tty ) |
1da177e4 LT |
2235 | tty_flip_buffer_push(tty); |
2236 | } | |
2237 | ||
2238 | static void isr_txeom(SLMP_INFO * info, unsigned char status) | |
2239 | { | |
2240 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
2241 | printk("%s(%d):%s isr_txeom status=%02x\n", | |
2242 | __FILE__,__LINE__,info->device_name,status); | |
2243 | ||
2244 | write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */ | |
2245 | write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */ | |
2246 | write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */ | |
2247 | ||
2248 | if (status & UDRN) { | |
2249 | write_reg(info, CMD, TXRESET); | |
2250 | write_reg(info, CMD, TXENABLE); | |
2251 | } else | |
2252 | write_reg(info, CMD, TXBUFCLR); | |
2253 | ||
2254 | /* disable and clear tx interrupts */ | |
2255 | info->ie0_value &= ~TXRDYE; | |
2256 | info->ie1_value &= ~(IDLE + UDRN); | |
2257 | write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value)); | |
2258 | write_reg(info, SR1, (unsigned char)(UDRN + IDLE)); | |
2259 | ||
2260 | if ( info->tx_active ) { | |
2261 | if (info->params.mode != MGSL_MODE_ASYNC) { | |
2262 | if (status & UDRN) | |
2263 | info->icount.txunder++; | |
2264 | else if (status & IDLE) | |
2265 | info->icount.txok++; | |
2266 | } | |
2267 | ||
0fab6de0 | 2268 | info->tx_active = false; |
1da177e4 LT |
2269 | info->tx_count = info->tx_put = info->tx_get = 0; |
2270 | ||
2271 | del_timer(&info->tx_timer); | |
2272 | ||
2273 | if (info->params.mode != MGSL_MODE_ASYNC && info->drop_rts_on_tx_done ) { | |
2274 | info->serial_signals &= ~SerialSignal_RTS; | |
0fab6de0 | 2275 | info->drop_rts_on_tx_done = false; |
1da177e4 LT |
2276 | set_signals(info); |
2277 | } | |
2278 | ||
af69c7f9 | 2279 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
2280 | if (info->netcount) |
2281 | hdlcdev_tx_done(info); | |
2282 | else | |
2283 | #endif | |
2284 | { | |
8fb06c77 | 2285 | if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) { |
1da177e4 LT |
2286 | tx_stop(info); |
2287 | return; | |
2288 | } | |
2289 | info->pending_bh |= BH_TRANSMIT; | |
2290 | } | |
2291 | } | |
2292 | } | |
2293 | ||
2294 | ||
2295 | /* | |
2296 | * handle tx status interrupts | |
2297 | */ | |
ce9f9f73 | 2298 | static void isr_txint(SLMP_INFO * info) |
1da177e4 LT |
2299 | { |
2300 | unsigned char status = read_reg(info, SR1) & info->ie1_value & (UDRN + IDLE + CCTS); | |
2301 | ||
2302 | /* clear status bits */ | |
2303 | write_reg(info, SR1, status); | |
2304 | ||
2305 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
2306 | printk("%s(%d):%s isr_txint status=%02x\n", | |
2307 | __FILE__,__LINE__,info->device_name,status); | |
2308 | ||
2309 | if (status & (UDRN + IDLE)) | |
2310 | isr_txeom(info, status); | |
2311 | ||
2312 | if (status & CCTS) { | |
2313 | /* simulate a common modem status change interrupt | |
2314 | * for our handler | |
2315 | */ | |
2316 | get_signals( info ); | |
2317 | isr_io_pin(info, | |
2318 | MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS)); | |
2319 | ||
2320 | } | |
2321 | } | |
2322 | ||
2323 | /* | |
2324 | * handle async tx data interrupts | |
2325 | */ | |
ce9f9f73 | 2326 | static void isr_txrdy(SLMP_INFO * info) |
1da177e4 LT |
2327 | { |
2328 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
2329 | printk("%s(%d):%s isr_txrdy() tx_count=%d\n", | |
2330 | __FILE__,__LINE__,info->device_name,info->tx_count); | |
2331 | ||
2332 | if (info->params.mode != MGSL_MODE_ASYNC) { | |
2333 | /* disable TXRDY IRQ, enable IDLE IRQ */ | |
2334 | info->ie0_value &= ~TXRDYE; | |
2335 | info->ie1_value |= IDLE; | |
2336 | write_reg16(info, IE0, (unsigned short)((info->ie1_value << 8) + info->ie0_value)); | |
2337 | return; | |
2338 | } | |
2339 | ||
8fb06c77 | 2340 | if (info->port.tty && (info->port.tty->stopped || info->port.tty->hw_stopped)) { |
1da177e4 LT |
2341 | tx_stop(info); |
2342 | return; | |
2343 | } | |
2344 | ||
2345 | if ( info->tx_count ) | |
2346 | tx_load_fifo( info ); | |
2347 | else { | |
0fab6de0 | 2348 | info->tx_active = false; |
1da177e4 LT |
2349 | info->ie0_value &= ~TXRDYE; |
2350 | write_reg(info, IE0, info->ie0_value); | |
2351 | } | |
2352 | ||
2353 | if (info->tx_count < WAKEUP_CHARS) | |
2354 | info->pending_bh |= BH_TRANSMIT; | |
2355 | } | |
2356 | ||
ce9f9f73 | 2357 | static void isr_rxdmaok(SLMP_INFO * info) |
1da177e4 LT |
2358 | { |
2359 | /* BIT7 = EOT (end of transfer) | |
2360 | * BIT6 = EOM (end of message/frame) | |
2361 | */ | |
2362 | unsigned char status = read_reg(info,RXDMA + DSR) & 0xc0; | |
2363 | ||
2364 | /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */ | |
2365 | write_reg(info, RXDMA + DSR, (unsigned char)(status | 1)); | |
2366 | ||
2367 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
2368 | printk("%s(%d):%s isr_rxdmaok(), status=%02x\n", | |
2369 | __FILE__,__LINE__,info->device_name,status); | |
2370 | ||
2371 | info->pending_bh |= BH_RECEIVE; | |
2372 | } | |
2373 | ||
ce9f9f73 | 2374 | static void isr_rxdmaerror(SLMP_INFO * info) |
1da177e4 LT |
2375 | { |
2376 | /* BIT5 = BOF (buffer overflow) | |
2377 | * BIT4 = COF (counter overflow) | |
2378 | */ | |
2379 | unsigned char status = read_reg(info,RXDMA + DSR) & 0x30; | |
2380 | ||
2381 | /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */ | |
2382 | write_reg(info, RXDMA + DSR, (unsigned char)(status | 1)); | |
2383 | ||
2384 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
2385 | printk("%s(%d):%s isr_rxdmaerror(), status=%02x\n", | |
2386 | __FILE__,__LINE__,info->device_name,status); | |
2387 | ||
0fab6de0 | 2388 | info->rx_overflow = true; |
1da177e4 LT |
2389 | info->pending_bh |= BH_RECEIVE; |
2390 | } | |
2391 | ||
ce9f9f73 | 2392 | static void isr_txdmaok(SLMP_INFO * info) |
1da177e4 LT |
2393 | { |
2394 | unsigned char status_reg1 = read_reg(info, SR1); | |
2395 | ||
2396 | write_reg(info, TXDMA + DIR, 0x00); /* disable Tx DMA IRQs */ | |
2397 | write_reg(info, TXDMA + DSR, 0xc0); /* clear IRQs and disable DMA */ | |
2398 | write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */ | |
2399 | ||
2400 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
2401 | printk("%s(%d):%s isr_txdmaok(), status=%02x\n", | |
2402 | __FILE__,__LINE__,info->device_name,status_reg1); | |
2403 | ||
2404 | /* program TXRDY as FIFO empty flag, enable TXRDY IRQ */ | |
2405 | write_reg16(info, TRC0, 0); | |
2406 | info->ie0_value |= TXRDYE; | |
2407 | write_reg(info, IE0, info->ie0_value); | |
2408 | } | |
2409 | ||
ce9f9f73 | 2410 | static void isr_txdmaerror(SLMP_INFO * info) |
1da177e4 LT |
2411 | { |
2412 | /* BIT5 = BOF (buffer overflow) | |
2413 | * BIT4 = COF (counter overflow) | |
2414 | */ | |
2415 | unsigned char status = read_reg(info,TXDMA + DSR) & 0x30; | |
2416 | ||
2417 | /* clear IRQ (BIT0 must be 1 to prevent clearing DE bit) */ | |
2418 | write_reg(info, TXDMA + DSR, (unsigned char)(status | 1)); | |
2419 | ||
2420 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
2421 | printk("%s(%d):%s isr_txdmaerror(), status=%02x\n", | |
2422 | __FILE__,__LINE__,info->device_name,status); | |
2423 | } | |
2424 | ||
2425 | /* handle input serial signal changes | |
2426 | */ | |
ce9f9f73 | 2427 | static void isr_io_pin( SLMP_INFO *info, u16 status ) |
1da177e4 LT |
2428 | { |
2429 | struct mgsl_icount *icount; | |
2430 | ||
2431 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
2432 | printk("%s(%d):isr_io_pin status=%04X\n", | |
2433 | __FILE__,__LINE__,status); | |
2434 | ||
2435 | if (status & (MISCSTATUS_CTS_LATCHED | MISCSTATUS_DCD_LATCHED | | |
2436 | MISCSTATUS_DSR_LATCHED | MISCSTATUS_RI_LATCHED) ) { | |
2437 | icount = &info->icount; | |
2438 | /* update input line counters */ | |
2439 | if (status & MISCSTATUS_RI_LATCHED) { | |
2440 | icount->rng++; | |
2441 | if ( status & SerialSignal_RI ) | |
2442 | info->input_signal_events.ri_up++; | |
2443 | else | |
2444 | info->input_signal_events.ri_down++; | |
2445 | } | |
2446 | if (status & MISCSTATUS_DSR_LATCHED) { | |
2447 | icount->dsr++; | |
2448 | if ( status & SerialSignal_DSR ) | |
2449 | info->input_signal_events.dsr_up++; | |
2450 | else | |
2451 | info->input_signal_events.dsr_down++; | |
2452 | } | |
2453 | if (status & MISCSTATUS_DCD_LATCHED) { | |
2454 | if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) { | |
2455 | info->ie1_value &= ~CDCD; | |
2456 | write_reg(info, IE1, info->ie1_value); | |
2457 | } | |
2458 | icount->dcd++; | |
2459 | if (status & SerialSignal_DCD) { | |
2460 | info->input_signal_events.dcd_up++; | |
2461 | } else | |
2462 | info->input_signal_events.dcd_down++; | |
af69c7f9 | 2463 | #if SYNCLINK_GENERIC_HDLC |
fbeff3c1 KH |
2464 | if (info->netcount) { |
2465 | if (status & SerialSignal_DCD) | |
2466 | netif_carrier_on(info->netdev); | |
2467 | else | |
2468 | netif_carrier_off(info->netdev); | |
2469 | } | |
1da177e4 LT |
2470 | #endif |
2471 | } | |
2472 | if (status & MISCSTATUS_CTS_LATCHED) | |
2473 | { | |
2474 | if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) { | |
2475 | info->ie1_value &= ~CCTS; | |
2476 | write_reg(info, IE1, info->ie1_value); | |
2477 | } | |
2478 | icount->cts++; | |
2479 | if ( status & SerialSignal_CTS ) | |
2480 | info->input_signal_events.cts_up++; | |
2481 | else | |
2482 | info->input_signal_events.cts_down++; | |
2483 | } | |
2484 | wake_up_interruptible(&info->status_event_wait_q); | |
2485 | wake_up_interruptible(&info->event_wait_q); | |
2486 | ||
8fb06c77 | 2487 | if ( (info->port.flags & ASYNC_CHECK_CD) && |
1da177e4 LT |
2488 | (status & MISCSTATUS_DCD_LATCHED) ) { |
2489 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
2490 | printk("%s CD now %s...", info->device_name, | |
2491 | (status & SerialSignal_DCD) ? "on" : "off"); | |
2492 | if (status & SerialSignal_DCD) | |
8fb06c77 | 2493 | wake_up_interruptible(&info->port.open_wait); |
1da177e4 LT |
2494 | else { |
2495 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
2496 | printk("doing serial hangup..."); | |
8fb06c77 AC |
2497 | if (info->port.tty) |
2498 | tty_hangup(info->port.tty); | |
1da177e4 LT |
2499 | } |
2500 | } | |
2501 | ||
8fb06c77 | 2502 | if ( (info->port.flags & ASYNC_CTS_FLOW) && |
1da177e4 | 2503 | (status & MISCSTATUS_CTS_LATCHED) ) { |
8fb06c77 AC |
2504 | if ( info->port.tty ) { |
2505 | if (info->port.tty->hw_stopped) { | |
1da177e4 LT |
2506 | if (status & SerialSignal_CTS) { |
2507 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
2508 | printk("CTS tx start..."); | |
8fb06c77 | 2509 | info->port.tty->hw_stopped = 0; |
1da177e4 LT |
2510 | tx_start(info); |
2511 | info->pending_bh |= BH_TRANSMIT; | |
2512 | return; | |
2513 | } | |
2514 | } else { | |
2515 | if (!(status & SerialSignal_CTS)) { | |
2516 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
2517 | printk("CTS tx stop..."); | |
8fb06c77 | 2518 | info->port.tty->hw_stopped = 1; |
1da177e4 LT |
2519 | tx_stop(info); |
2520 | } | |
2521 | } | |
2522 | } | |
2523 | } | |
2524 | } | |
2525 | ||
2526 | info->pending_bh |= BH_STATUS; | |
2527 | } | |
2528 | ||
2529 | /* Interrupt service routine entry point. | |
2530 | * | |
2531 | * Arguments: | |
2532 | * irq interrupt number that caused interrupt | |
2533 | * dev_id device ID supplied during interrupt registration | |
2534 | * regs interrupted processor context | |
2535 | */ | |
a6f97b29 | 2536 | static irqreturn_t synclinkmp_interrupt(int dummy, void *dev_id) |
1da177e4 | 2537 | { |
a6f97b29 | 2538 | SLMP_INFO *info = dev_id; |
1da177e4 LT |
2539 | unsigned char status, status0, status1=0; |
2540 | unsigned char dmastatus, dmastatus0, dmastatus1=0; | |
2541 | unsigned char timerstatus0, timerstatus1=0; | |
2542 | unsigned char shift; | |
2543 | unsigned int i; | |
2544 | unsigned short tmp; | |
2545 | ||
2546 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
a6f97b29 JG |
2547 | printk(KERN_DEBUG "%s(%d): synclinkmp_interrupt(%d)entry.\n", |
2548 | __FILE__, __LINE__, info->irq_level); | |
1da177e4 LT |
2549 | |
2550 | spin_lock(&info->lock); | |
2551 | ||
2552 | for(;;) { | |
2553 | ||
2554 | /* get status for SCA0 (ports 0-1) */ | |
2555 | tmp = read_reg16(info, ISR0); /* get ISR0 and ISR1 in one read */ | |
2556 | status0 = (unsigned char)tmp; | |
2557 | dmastatus0 = (unsigned char)(tmp>>8); | |
2558 | timerstatus0 = read_reg(info, ISR2); | |
2559 | ||
2560 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
a6f97b29 JG |
2561 | printk(KERN_DEBUG "%s(%d):%s status0=%02x, dmastatus0=%02x, timerstatus0=%02x\n", |
2562 | __FILE__, __LINE__, info->device_name, | |
2563 | status0, dmastatus0, timerstatus0); | |
1da177e4 LT |
2564 | |
2565 | if (info->port_count == 4) { | |
2566 | /* get status for SCA1 (ports 2-3) */ | |
2567 | tmp = read_reg16(info->port_array[2], ISR0); | |
2568 | status1 = (unsigned char)tmp; | |
2569 | dmastatus1 = (unsigned char)(tmp>>8); | |
2570 | timerstatus1 = read_reg(info->port_array[2], ISR2); | |
2571 | ||
2572 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
2573 | printk("%s(%d):%s status1=%02x, dmastatus1=%02x, timerstatus1=%02x\n", | |
2574 | __FILE__,__LINE__,info->device_name, | |
2575 | status1,dmastatus1,timerstatus1); | |
2576 | } | |
2577 | ||
2578 | if (!status0 && !dmastatus0 && !timerstatus0 && | |
2579 | !status1 && !dmastatus1 && !timerstatus1) | |
2580 | break; | |
2581 | ||
2582 | for(i=0; i < info->port_count ; i++) { | |
2583 | if (info->port_array[i] == NULL) | |
2584 | continue; | |
2585 | if (i < 2) { | |
2586 | status = status0; | |
2587 | dmastatus = dmastatus0; | |
2588 | } else { | |
2589 | status = status1; | |
2590 | dmastatus = dmastatus1; | |
2591 | } | |
2592 | ||
2593 | shift = i & 1 ? 4 :0; | |
2594 | ||
2595 | if (status & BIT0 << shift) | |
2596 | isr_rxrdy(info->port_array[i]); | |
2597 | if (status & BIT1 << shift) | |
2598 | isr_txrdy(info->port_array[i]); | |
2599 | if (status & BIT2 << shift) | |
2600 | isr_rxint(info->port_array[i]); | |
2601 | if (status & BIT3 << shift) | |
2602 | isr_txint(info->port_array[i]); | |
2603 | ||
2604 | if (dmastatus & BIT0 << shift) | |
2605 | isr_rxdmaerror(info->port_array[i]); | |
2606 | if (dmastatus & BIT1 << shift) | |
2607 | isr_rxdmaok(info->port_array[i]); | |
2608 | if (dmastatus & BIT2 << shift) | |
2609 | isr_txdmaerror(info->port_array[i]); | |
2610 | if (dmastatus & BIT3 << shift) | |
2611 | isr_txdmaok(info->port_array[i]); | |
2612 | } | |
2613 | ||
2614 | if (timerstatus0 & (BIT5 | BIT4)) | |
2615 | isr_timer(info->port_array[0]); | |
2616 | if (timerstatus0 & (BIT7 | BIT6)) | |
2617 | isr_timer(info->port_array[1]); | |
2618 | if (timerstatus1 & (BIT5 | BIT4)) | |
2619 | isr_timer(info->port_array[2]); | |
2620 | if (timerstatus1 & (BIT7 | BIT6)) | |
2621 | isr_timer(info->port_array[3]); | |
2622 | } | |
2623 | ||
2624 | for(i=0; i < info->port_count ; i++) { | |
2625 | SLMP_INFO * port = info->port_array[i]; | |
2626 | ||
2627 | /* Request bottom half processing if there's something | |
2628 | * for it to do and the bh is not already running. | |
2629 | * | |
2630 | * Note: startup adapter diags require interrupts. | |
2631 | * do not request bottom half processing if the | |
2632 | * device is not open in a normal mode. | |
2633 | */ | |
8fb06c77 | 2634 | if ( port && (port->port.count || port->netcount) && |
1da177e4 LT |
2635 | port->pending_bh && !port->bh_running && |
2636 | !port->bh_requested ) { | |
2637 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
2638 | printk("%s(%d):%s queueing bh task.\n", | |
2639 | __FILE__,__LINE__,port->device_name); | |
2640 | schedule_work(&port->task); | |
0fab6de0 | 2641 | port->bh_requested = true; |
1da177e4 LT |
2642 | } |
2643 | } | |
2644 | ||
2645 | spin_unlock(&info->lock); | |
2646 | ||
2647 | if ( debug_level >= DEBUG_LEVEL_ISR ) | |
a6f97b29 JG |
2648 | printk(KERN_DEBUG "%s(%d):synclinkmp_interrupt(%d)exit.\n", |
2649 | __FILE__, __LINE__, info->irq_level); | |
1da177e4 LT |
2650 | return IRQ_HANDLED; |
2651 | } | |
2652 | ||
2653 | /* Initialize and start device. | |
2654 | */ | |
2655 | static int startup(SLMP_INFO * info) | |
2656 | { | |
2657 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
2658 | printk("%s(%d):%s tx_releaseup()\n",__FILE__,__LINE__,info->device_name); | |
2659 | ||
8fb06c77 | 2660 | if (info->port.flags & ASYNC_INITIALIZED) |
1da177e4 LT |
2661 | return 0; |
2662 | ||
2663 | if (!info->tx_buf) { | |
5cbded58 | 2664 | info->tx_buf = kmalloc(info->max_frame_size, GFP_KERNEL); |
1da177e4 LT |
2665 | if (!info->tx_buf) { |
2666 | printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n", | |
2667 | __FILE__,__LINE__,info->device_name); | |
2668 | return -ENOMEM; | |
2669 | } | |
2670 | } | |
2671 | ||
2672 | info->pending_bh = 0; | |
2673 | ||
166692e4 PF |
2674 | memset(&info->icount, 0, sizeof(info->icount)); |
2675 | ||
1da177e4 LT |
2676 | /* program hardware for current parameters */ |
2677 | reset_port(info); | |
2678 | ||
2679 | change_params(info); | |
2680 | ||
40565f19 | 2681 | mod_timer(&info->status_timer, jiffies + msecs_to_jiffies(10)); |
1da177e4 | 2682 | |
8fb06c77 AC |
2683 | if (info->port.tty) |
2684 | clear_bit(TTY_IO_ERROR, &info->port.tty->flags); | |
1da177e4 | 2685 | |
8fb06c77 | 2686 | info->port.flags |= ASYNC_INITIALIZED; |
1da177e4 LT |
2687 | |
2688 | return 0; | |
2689 | } | |
2690 | ||
2691 | /* Called by close() and hangup() to shutdown hardware | |
2692 | */ | |
2693 | static void shutdown(SLMP_INFO * info) | |
2694 | { | |
2695 | unsigned long flags; | |
2696 | ||
8fb06c77 | 2697 | if (!(info->port.flags & ASYNC_INITIALIZED)) |
1da177e4 LT |
2698 | return; |
2699 | ||
2700 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2701 | printk("%s(%d):%s synclinkmp_shutdown()\n", | |
2702 | __FILE__,__LINE__, info->device_name ); | |
2703 | ||
2704 | /* clear status wait queue because status changes */ | |
2705 | /* can't happen after shutting down the hardware */ | |
2706 | wake_up_interruptible(&info->status_event_wait_q); | |
2707 | wake_up_interruptible(&info->event_wait_q); | |
2708 | ||
2709 | del_timer(&info->tx_timer); | |
2710 | del_timer(&info->status_timer); | |
2711 | ||
735d5661 JJ |
2712 | kfree(info->tx_buf); |
2713 | info->tx_buf = NULL; | |
1da177e4 LT |
2714 | |
2715 | spin_lock_irqsave(&info->lock,flags); | |
2716 | ||
2717 | reset_port(info); | |
2718 | ||
8fb06c77 | 2719 | if (!info->port.tty || info->port.tty->termios->c_cflag & HUPCL) { |
1da177e4 LT |
2720 | info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS); |
2721 | set_signals(info); | |
2722 | } | |
2723 | ||
2724 | spin_unlock_irqrestore(&info->lock,flags); | |
2725 | ||
8fb06c77 AC |
2726 | if (info->port.tty) |
2727 | set_bit(TTY_IO_ERROR, &info->port.tty->flags); | |
1da177e4 | 2728 | |
8fb06c77 | 2729 | info->port.flags &= ~ASYNC_INITIALIZED; |
1da177e4 LT |
2730 | } |
2731 | ||
2732 | static void program_hw(SLMP_INFO *info) | |
2733 | { | |
2734 | unsigned long flags; | |
2735 | ||
2736 | spin_lock_irqsave(&info->lock,flags); | |
2737 | ||
2738 | rx_stop(info); | |
2739 | tx_stop(info); | |
2740 | ||
2741 | info->tx_count = info->tx_put = info->tx_get = 0; | |
2742 | ||
2743 | if (info->params.mode == MGSL_MODE_HDLC || info->netcount) | |
2744 | hdlc_mode(info); | |
2745 | else | |
2746 | async_mode(info); | |
2747 | ||
2748 | set_signals(info); | |
2749 | ||
2750 | info->dcd_chkcount = 0; | |
2751 | info->cts_chkcount = 0; | |
2752 | info->ri_chkcount = 0; | |
2753 | info->dsr_chkcount = 0; | |
2754 | ||
2755 | info->ie1_value |= (CDCD|CCTS); | |
2756 | write_reg(info, IE1, info->ie1_value); | |
2757 | ||
2758 | get_signals(info); | |
2759 | ||
8fb06c77 | 2760 | if (info->netcount || (info->port.tty && info->port.tty->termios->c_cflag & CREAD) ) |
1da177e4 LT |
2761 | rx_start(info); |
2762 | ||
2763 | spin_unlock_irqrestore(&info->lock,flags); | |
2764 | } | |
2765 | ||
2766 | /* Reconfigure adapter based on new parameters | |
2767 | */ | |
2768 | static void change_params(SLMP_INFO *info) | |
2769 | { | |
2770 | unsigned cflag; | |
2771 | int bits_per_char; | |
2772 | ||
8fb06c77 | 2773 | if (!info->port.tty || !info->port.tty->termios) |
1da177e4 LT |
2774 | return; |
2775 | ||
2776 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2777 | printk("%s(%d):%s change_params()\n", | |
2778 | __FILE__,__LINE__, info->device_name ); | |
2779 | ||
8fb06c77 | 2780 | cflag = info->port.tty->termios->c_cflag; |
1da177e4 LT |
2781 | |
2782 | /* if B0 rate (hangup) specified then negate DTR and RTS */ | |
2783 | /* otherwise assert DTR and RTS */ | |
2784 | if (cflag & CBAUD) | |
2785 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; | |
2786 | else | |
2787 | info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); | |
2788 | ||
2789 | /* byte size and parity */ | |
2790 | ||
2791 | switch (cflag & CSIZE) { | |
2792 | case CS5: info->params.data_bits = 5; break; | |
2793 | case CS6: info->params.data_bits = 6; break; | |
2794 | case CS7: info->params.data_bits = 7; break; | |
2795 | case CS8: info->params.data_bits = 8; break; | |
2796 | /* Never happens, but GCC is too dumb to figure it out */ | |
2797 | default: info->params.data_bits = 7; break; | |
2798 | } | |
2799 | ||
2800 | if (cflag & CSTOPB) | |
2801 | info->params.stop_bits = 2; | |
2802 | else | |
2803 | info->params.stop_bits = 1; | |
2804 | ||
2805 | info->params.parity = ASYNC_PARITY_NONE; | |
2806 | if (cflag & PARENB) { | |
2807 | if (cflag & PARODD) | |
2808 | info->params.parity = ASYNC_PARITY_ODD; | |
2809 | else | |
2810 | info->params.parity = ASYNC_PARITY_EVEN; | |
2811 | #ifdef CMSPAR | |
2812 | if (cflag & CMSPAR) | |
2813 | info->params.parity = ASYNC_PARITY_SPACE; | |
2814 | #endif | |
2815 | } | |
2816 | ||
2817 | /* calculate number of jiffies to transmit a full | |
2818 | * FIFO (32 bytes) at specified data rate | |
2819 | */ | |
2820 | bits_per_char = info->params.data_bits + | |
2821 | info->params.stop_bits + 1; | |
2822 | ||
2823 | /* if port data rate is set to 460800 or less then | |
2824 | * allow tty settings to override, otherwise keep the | |
2825 | * current data rate. | |
2826 | */ | |
2827 | if (info->params.data_rate <= 460800) { | |
8fb06c77 | 2828 | info->params.data_rate = tty_get_baud_rate(info->port.tty); |
1da177e4 LT |
2829 | } |
2830 | ||
2831 | if ( info->params.data_rate ) { | |
2832 | info->timeout = (32*HZ*bits_per_char) / | |
2833 | info->params.data_rate; | |
2834 | } | |
2835 | info->timeout += HZ/50; /* Add .02 seconds of slop */ | |
2836 | ||
2837 | if (cflag & CRTSCTS) | |
8fb06c77 | 2838 | info->port.flags |= ASYNC_CTS_FLOW; |
1da177e4 | 2839 | else |
8fb06c77 | 2840 | info->port.flags &= ~ASYNC_CTS_FLOW; |
1da177e4 LT |
2841 | |
2842 | if (cflag & CLOCAL) | |
8fb06c77 | 2843 | info->port.flags &= ~ASYNC_CHECK_CD; |
1da177e4 | 2844 | else |
8fb06c77 | 2845 | info->port.flags |= ASYNC_CHECK_CD; |
1da177e4 LT |
2846 | |
2847 | /* process tty input control flags */ | |
2848 | ||
2849 | info->read_status_mask2 = OVRN; | |
8fb06c77 | 2850 | if (I_INPCK(info->port.tty)) |
1da177e4 | 2851 | info->read_status_mask2 |= PE | FRME; |
8fb06c77 | 2852 | if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty)) |
1da177e4 | 2853 | info->read_status_mask1 |= BRKD; |
8fb06c77 | 2854 | if (I_IGNPAR(info->port.tty)) |
1da177e4 | 2855 | info->ignore_status_mask2 |= PE | FRME; |
8fb06c77 | 2856 | if (I_IGNBRK(info->port.tty)) { |
1da177e4 LT |
2857 | info->ignore_status_mask1 |= BRKD; |
2858 | /* If ignoring parity and break indicators, ignore | |
2859 | * overruns too. (For real raw support). | |
2860 | */ | |
8fb06c77 | 2861 | if (I_IGNPAR(info->port.tty)) |
1da177e4 LT |
2862 | info->ignore_status_mask2 |= OVRN; |
2863 | } | |
2864 | ||
2865 | program_hw(info); | |
2866 | } | |
2867 | ||
2868 | static int get_stats(SLMP_INFO * info, struct mgsl_icount __user *user_icount) | |
2869 | { | |
2870 | int err; | |
2871 | ||
2872 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2873 | printk("%s(%d):%s get_params()\n", | |
2874 | __FILE__,__LINE__, info->device_name); | |
2875 | ||
166692e4 PF |
2876 | if (!user_icount) { |
2877 | memset(&info->icount, 0, sizeof(info->icount)); | |
2878 | } else { | |
f602501d | 2879 | mutex_lock(&info->port.mutex); |
166692e4 | 2880 | COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount)); |
f602501d | 2881 | mutex_unlock(&info->port.mutex); |
166692e4 PF |
2882 | if (err) |
2883 | return -EFAULT; | |
1da177e4 LT |
2884 | } |
2885 | ||
2886 | return 0; | |
2887 | } | |
2888 | ||
2889 | static int get_params(SLMP_INFO * info, MGSL_PARAMS __user *user_params) | |
2890 | { | |
2891 | int err; | |
2892 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2893 | printk("%s(%d):%s get_params()\n", | |
2894 | __FILE__,__LINE__, info->device_name); | |
2895 | ||
f602501d | 2896 | mutex_lock(&info->port.mutex); |
1da177e4 | 2897 | COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS)); |
f602501d | 2898 | mutex_unlock(&info->port.mutex); |
1da177e4 LT |
2899 | if (err) { |
2900 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
2901 | printk( "%s(%d):%s get_params() user buffer copy failed\n", | |
2902 | __FILE__,__LINE__,info->device_name); | |
2903 | return -EFAULT; | |
2904 | } | |
2905 | ||
2906 | return 0; | |
2907 | } | |
2908 | ||
2909 | static int set_params(SLMP_INFO * info, MGSL_PARAMS __user *new_params) | |
2910 | { | |
2911 | unsigned long flags; | |
2912 | MGSL_PARAMS tmp_params; | |
2913 | int err; | |
2914 | ||
2915 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2916 | printk("%s(%d):%s set_params\n", | |
2917 | __FILE__,__LINE__,info->device_name ); | |
2918 | COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS)); | |
2919 | if (err) { | |
2920 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
2921 | printk( "%s(%d):%s set_params() user buffer copy failed\n", | |
2922 | __FILE__,__LINE__,info->device_name); | |
2923 | return -EFAULT; | |
2924 | } | |
2925 | ||
f602501d | 2926 | mutex_lock(&info->port.mutex); |
1da177e4 LT |
2927 | spin_lock_irqsave(&info->lock,flags); |
2928 | memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS)); | |
2929 | spin_unlock_irqrestore(&info->lock,flags); | |
2930 | ||
2931 | change_params(info); | |
f602501d | 2932 | mutex_unlock(&info->port.mutex); |
1da177e4 LT |
2933 | |
2934 | return 0; | |
2935 | } | |
2936 | ||
2937 | static int get_txidle(SLMP_INFO * info, int __user *idle_mode) | |
2938 | { | |
2939 | int err; | |
2940 | ||
2941 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2942 | printk("%s(%d):%s get_txidle()=%d\n", | |
2943 | __FILE__,__LINE__, info->device_name, info->idle_mode); | |
2944 | ||
2945 | COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int)); | |
2946 | if (err) { | |
2947 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
2948 | printk( "%s(%d):%s get_txidle() user buffer copy failed\n", | |
2949 | __FILE__,__LINE__,info->device_name); | |
2950 | return -EFAULT; | |
2951 | } | |
2952 | ||
2953 | return 0; | |
2954 | } | |
2955 | ||
2956 | static int set_txidle(SLMP_INFO * info, int idle_mode) | |
2957 | { | |
2958 | unsigned long flags; | |
2959 | ||
2960 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2961 | printk("%s(%d):%s set_txidle(%d)\n", | |
2962 | __FILE__,__LINE__,info->device_name, idle_mode ); | |
2963 | ||
2964 | spin_lock_irqsave(&info->lock,flags); | |
2965 | info->idle_mode = idle_mode; | |
2966 | tx_set_idle( info ); | |
2967 | spin_unlock_irqrestore(&info->lock,flags); | |
2968 | return 0; | |
2969 | } | |
2970 | ||
2971 | static int tx_enable(SLMP_INFO * info, int enable) | |
2972 | { | |
2973 | unsigned long flags; | |
2974 | ||
2975 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2976 | printk("%s(%d):%s tx_enable(%d)\n", | |
2977 | __FILE__,__LINE__,info->device_name, enable); | |
2978 | ||
2979 | spin_lock_irqsave(&info->lock,flags); | |
2980 | if ( enable ) { | |
2981 | if ( !info->tx_enabled ) { | |
2982 | tx_start(info); | |
2983 | } | |
2984 | } else { | |
2985 | if ( info->tx_enabled ) | |
2986 | tx_stop(info); | |
2987 | } | |
2988 | spin_unlock_irqrestore(&info->lock,flags); | |
2989 | return 0; | |
2990 | } | |
2991 | ||
2992 | /* abort send HDLC frame | |
2993 | */ | |
2994 | static int tx_abort(SLMP_INFO * info) | |
2995 | { | |
2996 | unsigned long flags; | |
2997 | ||
2998 | if (debug_level >= DEBUG_LEVEL_INFO) | |
2999 | printk("%s(%d):%s tx_abort()\n", | |
3000 | __FILE__,__LINE__,info->device_name); | |
3001 | ||
3002 | spin_lock_irqsave(&info->lock,flags); | |
3003 | if ( info->tx_active && info->params.mode == MGSL_MODE_HDLC ) { | |
3004 | info->ie1_value &= ~UDRN; | |
3005 | info->ie1_value |= IDLE; | |
3006 | write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */ | |
3007 | write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */ | |
3008 | ||
3009 | write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */ | |
3010 | write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */ | |
3011 | ||
3012 | write_reg(info, CMD, TXABORT); | |
3013 | } | |
3014 | spin_unlock_irqrestore(&info->lock,flags); | |
3015 | return 0; | |
3016 | } | |
3017 | ||
3018 | static int rx_enable(SLMP_INFO * info, int enable) | |
3019 | { | |
3020 | unsigned long flags; | |
3021 | ||
3022 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3023 | printk("%s(%d):%s rx_enable(%d)\n", | |
3024 | __FILE__,__LINE__,info->device_name,enable); | |
3025 | ||
3026 | spin_lock_irqsave(&info->lock,flags); | |
3027 | if ( enable ) { | |
3028 | if ( !info->rx_enabled ) | |
3029 | rx_start(info); | |
3030 | } else { | |
3031 | if ( info->rx_enabled ) | |
3032 | rx_stop(info); | |
3033 | } | |
3034 | spin_unlock_irqrestore(&info->lock,flags); | |
3035 | return 0; | |
3036 | } | |
3037 | ||
1da177e4 LT |
3038 | /* wait for specified event to occur |
3039 | */ | |
3040 | static int wait_mgsl_event(SLMP_INFO * info, int __user *mask_ptr) | |
3041 | { | |
3042 | unsigned long flags; | |
3043 | int s; | |
3044 | int rc=0; | |
3045 | struct mgsl_icount cprev, cnow; | |
3046 | int events; | |
3047 | int mask; | |
3048 | struct _input_signal_events oldsigs, newsigs; | |
3049 | DECLARE_WAITQUEUE(wait, current); | |
3050 | ||
3051 | COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int)); | |
3052 | if (rc) { | |
3053 | return -EFAULT; | |
3054 | } | |
3055 | ||
3056 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3057 | printk("%s(%d):%s wait_mgsl_event(%d)\n", | |
3058 | __FILE__,__LINE__,info->device_name,mask); | |
3059 | ||
3060 | spin_lock_irqsave(&info->lock,flags); | |
3061 | ||
3062 | /* return immediately if state matches requested events */ | |
3063 | get_signals(info); | |
7f3edb94 | 3064 | s = info->serial_signals; |
1da177e4 LT |
3065 | |
3066 | events = mask & | |
3067 | ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) + | |
3068 | ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) + | |
3069 | ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) + | |
3070 | ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) ); | |
3071 | if (events) { | |
3072 | spin_unlock_irqrestore(&info->lock,flags); | |
3073 | goto exit; | |
3074 | } | |
3075 | ||
3076 | /* save current irq counts */ | |
3077 | cprev = info->icount; | |
3078 | oldsigs = info->input_signal_events; | |
3079 | ||
3080 | /* enable hunt and idle irqs if needed */ | |
3081 | if (mask & (MgslEvent_ExitHuntMode+MgslEvent_IdleReceived)) { | |
3082 | unsigned char oldval = info->ie1_value; | |
3083 | unsigned char newval = oldval + | |
3084 | (mask & MgslEvent_ExitHuntMode ? FLGD:0) + | |
3085 | (mask & MgslEvent_IdleReceived ? IDLD:0); | |
3086 | if ( oldval != newval ) { | |
3087 | info->ie1_value = newval; | |
3088 | write_reg(info, IE1, info->ie1_value); | |
3089 | } | |
3090 | } | |
3091 | ||
3092 | set_current_state(TASK_INTERRUPTIBLE); | |
3093 | add_wait_queue(&info->event_wait_q, &wait); | |
3094 | ||
3095 | spin_unlock_irqrestore(&info->lock,flags); | |
3096 | ||
3097 | for(;;) { | |
3098 | schedule(); | |
3099 | if (signal_pending(current)) { | |
3100 | rc = -ERESTARTSYS; | |
3101 | break; | |
3102 | } | |
3103 | ||
3104 | /* get current irq counts */ | |
3105 | spin_lock_irqsave(&info->lock,flags); | |
3106 | cnow = info->icount; | |
3107 | newsigs = info->input_signal_events; | |
3108 | set_current_state(TASK_INTERRUPTIBLE); | |
3109 | spin_unlock_irqrestore(&info->lock,flags); | |
3110 | ||
3111 | /* if no change, wait aborted for some reason */ | |
3112 | if (newsigs.dsr_up == oldsigs.dsr_up && | |
3113 | newsigs.dsr_down == oldsigs.dsr_down && | |
3114 | newsigs.dcd_up == oldsigs.dcd_up && | |
3115 | newsigs.dcd_down == oldsigs.dcd_down && | |
3116 | newsigs.cts_up == oldsigs.cts_up && | |
3117 | newsigs.cts_down == oldsigs.cts_down && | |
3118 | newsigs.ri_up == oldsigs.ri_up && | |
3119 | newsigs.ri_down == oldsigs.ri_down && | |
3120 | cnow.exithunt == cprev.exithunt && | |
3121 | cnow.rxidle == cprev.rxidle) { | |
3122 | rc = -EIO; | |
3123 | break; | |
3124 | } | |
3125 | ||
3126 | events = mask & | |
3127 | ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) + | |
3128 | (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) + | |
3129 | (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) + | |
3130 | (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) + | |
3131 | (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) + | |
3132 | (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) + | |
3133 | (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) + | |
3134 | (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) + | |
3135 | (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) + | |
3136 | (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) ); | |
3137 | if (events) | |
3138 | break; | |
3139 | ||
3140 | cprev = cnow; | |
3141 | oldsigs = newsigs; | |
3142 | } | |
3143 | ||
3144 | remove_wait_queue(&info->event_wait_q, &wait); | |
3145 | set_current_state(TASK_RUNNING); | |
3146 | ||
3147 | ||
3148 | if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) { | |
3149 | spin_lock_irqsave(&info->lock,flags); | |
3150 | if (!waitqueue_active(&info->event_wait_q)) { | |
3151 | /* disable enable exit hunt mode/idle rcvd IRQs */ | |
3152 | info->ie1_value &= ~(FLGD|IDLD); | |
3153 | write_reg(info, IE1, info->ie1_value); | |
3154 | } | |
3155 | spin_unlock_irqrestore(&info->lock,flags); | |
3156 | } | |
3157 | exit: | |
3158 | if ( rc == 0 ) | |
3159 | PUT_USER(rc, events, mask_ptr); | |
3160 | ||
3161 | return rc; | |
3162 | } | |
3163 | ||
3164 | static int modem_input_wait(SLMP_INFO *info,int arg) | |
3165 | { | |
3166 | unsigned long flags; | |
3167 | int rc; | |
3168 | struct mgsl_icount cprev, cnow; | |
3169 | DECLARE_WAITQUEUE(wait, current); | |
3170 | ||
3171 | /* save current irq counts */ | |
3172 | spin_lock_irqsave(&info->lock,flags); | |
3173 | cprev = info->icount; | |
3174 | add_wait_queue(&info->status_event_wait_q, &wait); | |
3175 | set_current_state(TASK_INTERRUPTIBLE); | |
3176 | spin_unlock_irqrestore(&info->lock,flags); | |
3177 | ||
3178 | for(;;) { | |
3179 | schedule(); | |
3180 | if (signal_pending(current)) { | |
3181 | rc = -ERESTARTSYS; | |
3182 | break; | |
3183 | } | |
3184 | ||
3185 | /* get new irq counts */ | |
3186 | spin_lock_irqsave(&info->lock,flags); | |
3187 | cnow = info->icount; | |
3188 | set_current_state(TASK_INTERRUPTIBLE); | |
3189 | spin_unlock_irqrestore(&info->lock,flags); | |
3190 | ||
3191 | /* if no change, wait aborted for some reason */ | |
3192 | if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && | |
3193 | cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) { | |
3194 | rc = -EIO; | |
3195 | break; | |
3196 | } | |
3197 | ||
3198 | /* check for change in caller specified modem input */ | |
3199 | if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) || | |
3200 | (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) || | |
3201 | (arg & TIOCM_CD && cnow.dcd != cprev.dcd) || | |
3202 | (arg & TIOCM_CTS && cnow.cts != cprev.cts)) { | |
3203 | rc = 0; | |
3204 | break; | |
3205 | } | |
3206 | ||
3207 | cprev = cnow; | |
3208 | } | |
3209 | remove_wait_queue(&info->status_event_wait_q, &wait); | |
3210 | set_current_state(TASK_RUNNING); | |
3211 | return rc; | |
3212 | } | |
3213 | ||
3214 | /* return the state of the serial control and status signals | |
3215 | */ | |
3216 | static int tiocmget(struct tty_struct *tty, struct file *file) | |
3217 | { | |
c9f19e96 | 3218 | SLMP_INFO *info = tty->driver_data; |
1da177e4 LT |
3219 | unsigned int result; |
3220 | unsigned long flags; | |
3221 | ||
3222 | spin_lock_irqsave(&info->lock,flags); | |
3223 | get_signals(info); | |
3224 | spin_unlock_irqrestore(&info->lock,flags); | |
3225 | ||
3226 | result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) + | |
3227 | ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) + | |
3228 | ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) + | |
3229 | ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) + | |
3230 | ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) + | |
3231 | ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0); | |
3232 | ||
3233 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3234 | printk("%s(%d):%s tiocmget() value=%08X\n", | |
3235 | __FILE__,__LINE__, info->device_name, result ); | |
3236 | return result; | |
3237 | } | |
3238 | ||
3239 | /* set modem control signals (DTR/RTS) | |
3240 | */ | |
3241 | static int tiocmset(struct tty_struct *tty, struct file *file, | |
3242 | unsigned int set, unsigned int clear) | |
3243 | { | |
c9f19e96 | 3244 | SLMP_INFO *info = tty->driver_data; |
1da177e4 LT |
3245 | unsigned long flags; |
3246 | ||
3247 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3248 | printk("%s(%d):%s tiocmset(%x,%x)\n", | |
3249 | __FILE__,__LINE__,info->device_name, set, clear); | |
3250 | ||
3251 | if (set & TIOCM_RTS) | |
3252 | info->serial_signals |= SerialSignal_RTS; | |
3253 | if (set & TIOCM_DTR) | |
3254 | info->serial_signals |= SerialSignal_DTR; | |
3255 | if (clear & TIOCM_RTS) | |
3256 | info->serial_signals &= ~SerialSignal_RTS; | |
3257 | if (clear & TIOCM_DTR) | |
3258 | info->serial_signals &= ~SerialSignal_DTR; | |
3259 | ||
3260 | spin_lock_irqsave(&info->lock,flags); | |
3261 | set_signals(info); | |
3262 | spin_unlock_irqrestore(&info->lock,flags); | |
3263 | ||
3264 | return 0; | |
3265 | } | |
3266 | ||
31f35939 AC |
3267 | static int carrier_raised(struct tty_port *port) |
3268 | { | |
3269 | SLMP_INFO *info = container_of(port, SLMP_INFO, port); | |
3270 | unsigned long flags; | |
1da177e4 | 3271 | |
31f35939 AC |
3272 | spin_lock_irqsave(&info->lock,flags); |
3273 | get_signals(info); | |
3274 | spin_unlock_irqrestore(&info->lock,flags); | |
3275 | ||
3276 | return (info->serial_signals & SerialSignal_DCD) ? 1 : 0; | |
3277 | } | |
1da177e4 | 3278 | |
fcc8ac18 | 3279 | static void dtr_rts(struct tty_port *port, int on) |
3e61696b AC |
3280 | { |
3281 | SLMP_INFO *info = container_of(port, SLMP_INFO, port); | |
3282 | unsigned long flags; | |
3283 | ||
3284 | spin_lock_irqsave(&info->lock,flags); | |
fcc8ac18 AC |
3285 | if (on) |
3286 | info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; | |
3287 | else | |
3288 | info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); | |
3e61696b AC |
3289 | set_signals(info); |
3290 | spin_unlock_irqrestore(&info->lock,flags); | |
3291 | } | |
3292 | ||
1da177e4 LT |
3293 | /* Block the current process until the specified port is ready to open. |
3294 | */ | |
3295 | static int block_til_ready(struct tty_struct *tty, struct file *filp, | |
3296 | SLMP_INFO *info) | |
3297 | { | |
3298 | DECLARE_WAITQUEUE(wait, current); | |
3299 | int retval; | |
0fab6de0 JP |
3300 | bool do_clocal = false; |
3301 | bool extra_count = false; | |
1da177e4 | 3302 | unsigned long flags; |
31f35939 AC |
3303 | int cd; |
3304 | struct tty_port *port = &info->port; | |
1da177e4 LT |
3305 | |
3306 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3307 | printk("%s(%d):%s block_til_ready()\n", | |
3308 | __FILE__,__LINE__, tty->driver->name ); | |
3309 | ||
3310 | if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){ | |
3311 | /* nonblock mode is set or port is not enabled */ | |
3312 | /* just verify that callout device is not active */ | |
31f35939 | 3313 | port->flags |= ASYNC_NORMAL_ACTIVE; |
1da177e4 LT |
3314 | return 0; |
3315 | } | |
3316 | ||
3317 | if (tty->termios->c_cflag & CLOCAL) | |
0fab6de0 | 3318 | do_clocal = true; |
1da177e4 LT |
3319 | |
3320 | /* Wait for carrier detect and the line to become | |
3321 | * free (i.e., not in use by the callout). While we are in | |
31f35939 | 3322 | * this loop, port->count is dropped by one, so that |
1da177e4 LT |
3323 | * close() knows when to free things. We restore it upon |
3324 | * exit, either normal or abnormal. | |
3325 | */ | |
3326 | ||
3327 | retval = 0; | |
31f35939 | 3328 | add_wait_queue(&port->open_wait, &wait); |
1da177e4 LT |
3329 | |
3330 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3331 | printk("%s(%d):%s block_til_ready() before block, count=%d\n", | |
31f35939 | 3332 | __FILE__,__LINE__, tty->driver->name, port->count ); |
1da177e4 LT |
3333 | |
3334 | spin_lock_irqsave(&info->lock, flags); | |
3335 | if (!tty_hung_up_p(filp)) { | |
0fab6de0 | 3336 | extra_count = true; |
31f35939 | 3337 | port->count--; |
1da177e4 LT |
3338 | } |
3339 | spin_unlock_irqrestore(&info->lock, flags); | |
31f35939 | 3340 | port->blocked_open++; |
1da177e4 LT |
3341 | |
3342 | while (1) { | |
3e61696b AC |
3343 | if (tty->termios->c_cflag & CBAUD) |
3344 | tty_port_raise_dtr_rts(port); | |
1da177e4 LT |
3345 | |
3346 | set_current_state(TASK_INTERRUPTIBLE); | |
3347 | ||
31f35939 AC |
3348 | if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){ |
3349 | retval = (port->flags & ASYNC_HUP_NOTIFY) ? | |
1da177e4 LT |
3350 | -EAGAIN : -ERESTARTSYS; |
3351 | break; | |
3352 | } | |
3353 | ||
31f35939 | 3354 | cd = tty_port_carrier_raised(port); |
1da177e4 | 3355 | |
31f35939 | 3356 | if (!(port->flags & ASYNC_CLOSING) && (do_clocal || cd)) |
1da177e4 | 3357 | break; |
1da177e4 LT |
3358 | |
3359 | if (signal_pending(current)) { | |
3360 | retval = -ERESTARTSYS; | |
3361 | break; | |
3362 | } | |
3363 | ||
3364 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3365 | printk("%s(%d):%s block_til_ready() count=%d\n", | |
31f35939 | 3366 | __FILE__,__LINE__, tty->driver->name, port->count ); |
1da177e4 | 3367 | |
e142a31d | 3368 | tty_unlock(); |
1da177e4 | 3369 | schedule(); |
e142a31d | 3370 | tty_lock(); |
1da177e4 LT |
3371 | } |
3372 | ||
3373 | set_current_state(TASK_RUNNING); | |
31f35939 | 3374 | remove_wait_queue(&port->open_wait, &wait); |
1da177e4 LT |
3375 | |
3376 | if (extra_count) | |
31f35939 AC |
3377 | port->count++; |
3378 | port->blocked_open--; | |
1da177e4 LT |
3379 | |
3380 | if (debug_level >= DEBUG_LEVEL_INFO) | |
3381 | printk("%s(%d):%s block_til_ready() after, count=%d\n", | |
31f35939 | 3382 | __FILE__,__LINE__, tty->driver->name, port->count ); |
1da177e4 LT |
3383 | |
3384 | if (!retval) | |
31f35939 | 3385 | port->flags |= ASYNC_NORMAL_ACTIVE; |
1da177e4 LT |
3386 | |
3387 | return retval; | |
3388 | } | |
3389 | ||
ce9f9f73 | 3390 | static int alloc_dma_bufs(SLMP_INFO *info) |
1da177e4 LT |
3391 | { |
3392 | unsigned short BuffersPerFrame; | |
3393 | unsigned short BufferCount; | |
3394 | ||
3395 | // Force allocation to start at 64K boundary for each port. | |
3396 | // This is necessary because *all* buffer descriptors for a port | |
3397 | // *must* be in the same 64K block. All descriptors on a port | |
3398 | // share a common 'base' address (upper 8 bits of 24 bits) programmed | |
3399 | // into the CBP register. | |
3400 | info->port_array[0]->last_mem_alloc = (SCA_MEM_SIZE/4) * info->port_num; | |
3401 | ||
3402 | /* Calculate the number of DMA buffers necessary to hold the */ | |
3403 | /* largest allowable frame size. Note: If the max frame size is */ | |
3404 | /* not an even multiple of the DMA buffer size then we need to */ | |
3405 | /* round the buffer count per frame up one. */ | |
3406 | ||
3407 | BuffersPerFrame = (unsigned short)(info->max_frame_size/SCABUFSIZE); | |
3408 | if ( info->max_frame_size % SCABUFSIZE ) | |
3409 | BuffersPerFrame++; | |
3410 | ||
3411 | /* calculate total number of data buffers (SCABUFSIZE) possible | |
3412 | * in one ports memory (SCA_MEM_SIZE/4) after allocating memory | |
3413 | * for the descriptor list (BUFFERLISTSIZE). | |
3414 | */ | |
3415 | BufferCount = (SCA_MEM_SIZE/4 - BUFFERLISTSIZE)/SCABUFSIZE; | |
3416 | ||
3417 | /* limit number of buffers to maximum amount of descriptors */ | |
3418 | if (BufferCount > BUFFERLISTSIZE/sizeof(SCADESC)) | |
3419 | BufferCount = BUFFERLISTSIZE/sizeof(SCADESC); | |
3420 | ||
3421 | /* use enough buffers to transmit one max size frame */ | |
3422 | info->tx_buf_count = BuffersPerFrame + 1; | |
3423 | ||
3424 | /* never use more than half the available buffers for transmit */ | |
3425 | if (info->tx_buf_count > (BufferCount/2)) | |
3426 | info->tx_buf_count = BufferCount/2; | |
3427 | ||
3428 | if (info->tx_buf_count > SCAMAXDESC) | |
3429 | info->tx_buf_count = SCAMAXDESC; | |
3430 | ||
3431 | /* use remaining buffers for receive */ | |
3432 | info->rx_buf_count = BufferCount - info->tx_buf_count; | |
3433 | ||
3434 | if (info->rx_buf_count > SCAMAXDESC) | |
3435 | info->rx_buf_count = SCAMAXDESC; | |
3436 | ||
3437 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
3438 | printk("%s(%d):%s Allocating %d TX and %d RX DMA buffers.\n", | |
3439 | __FILE__,__LINE__, info->device_name, | |
3440 | info->tx_buf_count,info->rx_buf_count); | |
3441 | ||
3442 | if ( alloc_buf_list( info ) < 0 || | |
3443 | alloc_frame_bufs(info, | |
3444 | info->rx_buf_list, | |
3445 | info->rx_buf_list_ex, | |
3446 | info->rx_buf_count) < 0 || | |
3447 | alloc_frame_bufs(info, | |
3448 | info->tx_buf_list, | |
3449 | info->tx_buf_list_ex, | |
3450 | info->tx_buf_count) < 0 || | |
3451 | alloc_tmp_rx_buf(info) < 0 ) { | |
3452 | printk("%s(%d):%s Can't allocate DMA buffer memory\n", | |
3453 | __FILE__,__LINE__, info->device_name); | |
3454 | return -ENOMEM; | |
3455 | } | |
3456 | ||
3457 | rx_reset_buffers( info ); | |
3458 | ||
3459 | return 0; | |
3460 | } | |
3461 | ||
3462 | /* Allocate DMA buffers for the transmit and receive descriptor lists. | |
3463 | */ | |
ce9f9f73 | 3464 | static int alloc_buf_list(SLMP_INFO *info) |
1da177e4 LT |
3465 | { |
3466 | unsigned int i; | |
3467 | ||
3468 | /* build list in adapter shared memory */ | |
3469 | info->buffer_list = info->memory_base + info->port_array[0]->last_mem_alloc; | |
3470 | info->buffer_list_phys = info->port_array[0]->last_mem_alloc; | |
3471 | info->port_array[0]->last_mem_alloc += BUFFERLISTSIZE; | |
3472 | ||
3473 | memset(info->buffer_list, 0, BUFFERLISTSIZE); | |
3474 | ||
3475 | /* Save virtual address pointers to the receive and */ | |
3476 | /* transmit buffer lists. (Receive 1st). These pointers will */ | |
3477 | /* be used by the processor to access the lists. */ | |
3478 | info->rx_buf_list = (SCADESC *)info->buffer_list; | |
3479 | ||
3480 | info->tx_buf_list = (SCADESC *)info->buffer_list; | |
3481 | info->tx_buf_list += info->rx_buf_count; | |
3482 | ||
3483 | /* Build links for circular buffer entry lists (tx and rx) | |
3484 | * | |
3485 | * Note: links are physical addresses read by the SCA device | |
3486 | * to determine the next buffer entry to use. | |
3487 | */ | |
3488 | ||
3489 | for ( i = 0; i < info->rx_buf_count; i++ ) { | |
3490 | /* calculate and store physical address of this buffer entry */ | |
3491 | info->rx_buf_list_ex[i].phys_entry = | |
3492 | info->buffer_list_phys + (i * sizeof(SCABUFSIZE)); | |
3493 | ||
3494 | /* calculate and store physical address of */ | |
3495 | /* next entry in cirular list of entries */ | |
3496 | info->rx_buf_list[i].next = info->buffer_list_phys; | |
3497 | if ( i < info->rx_buf_count - 1 ) | |
3498 | info->rx_buf_list[i].next += (i + 1) * sizeof(SCADESC); | |
3499 | ||
3500 | info->rx_buf_list[i].length = SCABUFSIZE; | |
3501 | } | |
3502 | ||
3503 | for ( i = 0; i < info->tx_buf_count; i++ ) { | |
3504 | /* calculate and store physical address of this buffer entry */ | |
3505 | info->tx_buf_list_ex[i].phys_entry = info->buffer_list_phys + | |
3506 | ((info->rx_buf_count + i) * sizeof(SCADESC)); | |
3507 | ||
3508 | /* calculate and store physical address of */ | |
3509 | /* next entry in cirular list of entries */ | |
3510 | ||
3511 | info->tx_buf_list[i].next = info->buffer_list_phys + | |
3512 | info->rx_buf_count * sizeof(SCADESC); | |
3513 | ||
3514 | if ( i < info->tx_buf_count - 1 ) | |
3515 | info->tx_buf_list[i].next += (i + 1) * sizeof(SCADESC); | |
3516 | } | |
3517 | ||
3518 | return 0; | |
3519 | } | |
3520 | ||
3521 | /* Allocate the frame DMA buffers used by the specified buffer list. | |
3522 | */ | |
ce9f9f73 | 3523 | static int alloc_frame_bufs(SLMP_INFO *info, SCADESC *buf_list,SCADESC_EX *buf_list_ex,int count) |
1da177e4 LT |
3524 | { |
3525 | int i; | |
3526 | unsigned long phys_addr; | |
3527 | ||
3528 | for ( i = 0; i < count; i++ ) { | |
3529 | buf_list_ex[i].virt_addr = info->memory_base + info->port_array[0]->last_mem_alloc; | |
3530 | phys_addr = info->port_array[0]->last_mem_alloc; | |
3531 | info->port_array[0]->last_mem_alloc += SCABUFSIZE; | |
3532 | ||
3533 | buf_list[i].buf_ptr = (unsigned short)phys_addr; | |
3534 | buf_list[i].buf_base = (unsigned char)(phys_addr >> 16); | |
3535 | } | |
3536 | ||
3537 | return 0; | |
3538 | } | |
3539 | ||
ce9f9f73 | 3540 | static void free_dma_bufs(SLMP_INFO *info) |
1da177e4 LT |
3541 | { |
3542 | info->buffer_list = NULL; | |
3543 | info->rx_buf_list = NULL; | |
3544 | info->tx_buf_list = NULL; | |
3545 | } | |
3546 | ||
3547 | /* allocate buffer large enough to hold max_frame_size. | |
3548 | * This buffer is used to pass an assembled frame to the line discipline. | |
3549 | */ | |
ce9f9f73 | 3550 | static int alloc_tmp_rx_buf(SLMP_INFO *info) |
1da177e4 LT |
3551 | { |
3552 | info->tmp_rx_buf = kmalloc(info->max_frame_size, GFP_KERNEL); | |
3553 | if (info->tmp_rx_buf == NULL) | |
3554 | return -ENOMEM; | |
3555 | return 0; | |
3556 | } | |
3557 | ||
ce9f9f73 | 3558 | static void free_tmp_rx_buf(SLMP_INFO *info) |
1da177e4 | 3559 | { |
735d5661 | 3560 | kfree(info->tmp_rx_buf); |
1da177e4 LT |
3561 | info->tmp_rx_buf = NULL; |
3562 | } | |
3563 | ||
ce9f9f73 | 3564 | static int claim_resources(SLMP_INFO *info) |
1da177e4 LT |
3565 | { |
3566 | if (request_mem_region(info->phys_memory_base,SCA_MEM_SIZE,"synclinkmp") == NULL) { | |
3567 | printk( "%s(%d):%s mem addr conflict, Addr=%08X\n", | |
3568 | __FILE__,__LINE__,info->device_name, info->phys_memory_base); | |
3569 | info->init_error = DiagStatus_AddressConflict; | |
3570 | goto errout; | |
3571 | } | |
3572 | else | |
0fab6de0 | 3573 | info->shared_mem_requested = true; |
1da177e4 LT |
3574 | |
3575 | if (request_mem_region(info->phys_lcr_base + info->lcr_offset,128,"synclinkmp") == NULL) { | |
3576 | printk( "%s(%d):%s lcr mem addr conflict, Addr=%08X\n", | |
3577 | __FILE__,__LINE__,info->device_name, info->phys_lcr_base); | |
3578 | info->init_error = DiagStatus_AddressConflict; | |
3579 | goto errout; | |
3580 | } | |
3581 | else | |
0fab6de0 | 3582 | info->lcr_mem_requested = true; |
1da177e4 LT |
3583 | |
3584 | if (request_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE,"synclinkmp") == NULL) { | |
3585 | printk( "%s(%d):%s sca mem addr conflict, Addr=%08X\n", | |
3586 | __FILE__,__LINE__,info->device_name, info->phys_sca_base); | |
3587 | info->init_error = DiagStatus_AddressConflict; | |
3588 | goto errout; | |
3589 | } | |
3590 | else | |
0fab6de0 | 3591 | info->sca_base_requested = true; |
1da177e4 LT |
3592 | |
3593 | if (request_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE,"synclinkmp") == NULL) { | |
3594 | printk( "%s(%d):%s stat/ctrl mem addr conflict, Addr=%08X\n", | |
3595 | __FILE__,__LINE__,info->device_name, info->phys_statctrl_base); | |
3596 | info->init_error = DiagStatus_AddressConflict; | |
3597 | goto errout; | |
3598 | } | |
3599 | else | |
0fab6de0 | 3600 | info->sca_statctrl_requested = true; |
1da177e4 | 3601 | |
24cb2335 AC |
3602 | info->memory_base = ioremap_nocache(info->phys_memory_base, |
3603 | SCA_MEM_SIZE); | |
1da177e4 LT |
3604 | if (!info->memory_base) { |
3605 | printk( "%s(%d):%s Cant map shared memory, MemAddr=%08X\n", | |
3606 | __FILE__,__LINE__,info->device_name, info->phys_memory_base ); | |
3607 | info->init_error = DiagStatus_CantAssignPciResources; | |
3608 | goto errout; | |
3609 | } | |
3610 | ||
24cb2335 | 3611 | info->lcr_base = ioremap_nocache(info->phys_lcr_base, PAGE_SIZE); |
1da177e4 LT |
3612 | if (!info->lcr_base) { |
3613 | printk( "%s(%d):%s Cant map LCR memory, MemAddr=%08X\n", | |
3614 | __FILE__,__LINE__,info->device_name, info->phys_lcr_base ); | |
3615 | info->init_error = DiagStatus_CantAssignPciResources; | |
3616 | goto errout; | |
3617 | } | |
3618 | info->lcr_base += info->lcr_offset; | |
3619 | ||
24cb2335 | 3620 | info->sca_base = ioremap_nocache(info->phys_sca_base, PAGE_SIZE); |
1da177e4 LT |
3621 | if (!info->sca_base) { |
3622 | printk( "%s(%d):%s Cant map SCA memory, MemAddr=%08X\n", | |
3623 | __FILE__,__LINE__,info->device_name, info->phys_sca_base ); | |
3624 | info->init_error = DiagStatus_CantAssignPciResources; | |
3625 | goto errout; | |
3626 | } | |
3627 | info->sca_base += info->sca_offset; | |
3628 | ||
24cb2335 AC |
3629 | info->statctrl_base = ioremap_nocache(info->phys_statctrl_base, |
3630 | PAGE_SIZE); | |
1da177e4 LT |
3631 | if (!info->statctrl_base) { |
3632 | printk( "%s(%d):%s Cant map SCA Status/Control memory, MemAddr=%08X\n", | |
3633 | __FILE__,__LINE__,info->device_name, info->phys_statctrl_base ); | |
3634 | info->init_error = DiagStatus_CantAssignPciResources; | |
3635 | goto errout; | |
3636 | } | |
3637 | info->statctrl_base += info->statctrl_offset; | |
3638 | ||
3639 | if ( !memory_test(info) ) { | |
3640 | printk( "%s(%d):Shared Memory Test failed for device %s MemAddr=%08X\n", | |
3641 | __FILE__,__LINE__,info->device_name, info->phys_memory_base ); | |
3642 | info->init_error = DiagStatus_MemoryError; | |
3643 | goto errout; | |
3644 | } | |
3645 | ||
3646 | return 0; | |
3647 | ||
3648 | errout: | |
3649 | release_resources( info ); | |
3650 | return -ENODEV; | |
3651 | } | |
3652 | ||
ce9f9f73 | 3653 | static void release_resources(SLMP_INFO *info) |
1da177e4 LT |
3654 | { |
3655 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
3656 | printk( "%s(%d):%s release_resources() entry\n", | |
3657 | __FILE__,__LINE__,info->device_name ); | |
3658 | ||
3659 | if ( info->irq_requested ) { | |
3660 | free_irq(info->irq_level, info); | |
0fab6de0 | 3661 | info->irq_requested = false; |
1da177e4 LT |
3662 | } |
3663 | ||
3664 | if ( info->shared_mem_requested ) { | |
3665 | release_mem_region(info->phys_memory_base,SCA_MEM_SIZE); | |
0fab6de0 | 3666 | info->shared_mem_requested = false; |
1da177e4 LT |
3667 | } |
3668 | if ( info->lcr_mem_requested ) { | |
3669 | release_mem_region(info->phys_lcr_base + info->lcr_offset,128); | |
0fab6de0 | 3670 | info->lcr_mem_requested = false; |
1da177e4 LT |
3671 | } |
3672 | if ( info->sca_base_requested ) { | |
3673 | release_mem_region(info->phys_sca_base + info->sca_offset,SCA_BASE_SIZE); | |
0fab6de0 | 3674 | info->sca_base_requested = false; |
1da177e4 LT |
3675 | } |
3676 | if ( info->sca_statctrl_requested ) { | |
3677 | release_mem_region(info->phys_statctrl_base + info->statctrl_offset,SCA_REG_SIZE); | |
0fab6de0 | 3678 | info->sca_statctrl_requested = false; |
1da177e4 LT |
3679 | } |
3680 | ||
3681 | if (info->memory_base){ | |
3682 | iounmap(info->memory_base); | |
3683 | info->memory_base = NULL; | |
3684 | } | |
3685 | ||
3686 | if (info->sca_base) { | |
3687 | iounmap(info->sca_base - info->sca_offset); | |
3688 | info->sca_base=NULL; | |
3689 | } | |
3690 | ||
3691 | if (info->statctrl_base) { | |
3692 | iounmap(info->statctrl_base - info->statctrl_offset); | |
3693 | info->statctrl_base=NULL; | |
3694 | } | |
3695 | ||
3696 | if (info->lcr_base){ | |
3697 | iounmap(info->lcr_base - info->lcr_offset); | |
3698 | info->lcr_base = NULL; | |
3699 | } | |
3700 | ||
3701 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
3702 | printk( "%s(%d):%s release_resources() exit\n", | |
3703 | __FILE__,__LINE__,info->device_name ); | |
3704 | } | |
3705 | ||
3706 | /* Add the specified device instance data structure to the | |
3707 | * global linked list of devices and increment the device count. | |
3708 | */ | |
ce9f9f73 | 3709 | static void add_device(SLMP_INFO *info) |
1da177e4 LT |
3710 | { |
3711 | info->next_device = NULL; | |
3712 | info->line = synclinkmp_device_count; | |
3713 | sprintf(info->device_name,"ttySLM%dp%d",info->adapter_num,info->port_num); | |
3714 | ||
3715 | if (info->line < MAX_DEVICES) { | |
3716 | if (maxframe[info->line]) | |
3717 | info->max_frame_size = maxframe[info->line]; | |
1da177e4 LT |
3718 | } |
3719 | ||
3720 | synclinkmp_device_count++; | |
3721 | ||
3722 | if ( !synclinkmp_device_list ) | |
3723 | synclinkmp_device_list = info; | |
3724 | else { | |
3725 | SLMP_INFO *current_dev = synclinkmp_device_list; | |
3726 | while( current_dev->next_device ) | |
3727 | current_dev = current_dev->next_device; | |
3728 | current_dev->next_device = info; | |
3729 | } | |
3730 | ||
3731 | if ( info->max_frame_size < 4096 ) | |
3732 | info->max_frame_size = 4096; | |
3733 | else if ( info->max_frame_size > 65535 ) | |
3734 | info->max_frame_size = 65535; | |
3735 | ||
3736 | printk( "SyncLink MultiPort %s: " | |
3737 | "Mem=(%08x %08X %08x %08X) IRQ=%d MaxFrameSize=%u\n", | |
3738 | info->device_name, | |
3739 | info->phys_sca_base, | |
3740 | info->phys_memory_base, | |
3741 | info->phys_statctrl_base, | |
3742 | info->phys_lcr_base, | |
3743 | info->irq_level, | |
3744 | info->max_frame_size ); | |
3745 | ||
af69c7f9 | 3746 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
3747 | hdlcdev_init(info); |
3748 | #endif | |
3749 | } | |
3750 | ||
31f35939 AC |
3751 | static const struct tty_port_operations port_ops = { |
3752 | .carrier_raised = carrier_raised, | |
fcc8ac18 | 3753 | .dtr_rts = dtr_rts, |
31f35939 AC |
3754 | }; |
3755 | ||
1da177e4 LT |
3756 | /* Allocate and initialize a device instance structure |
3757 | * | |
3758 | * Return Value: pointer to SLMP_INFO if success, otherwise NULL | |
3759 | */ | |
3760 | static SLMP_INFO *alloc_dev(int adapter_num, int port_num, struct pci_dev *pdev) | |
3761 | { | |
3762 | SLMP_INFO *info; | |
3763 | ||
dd00cc48 | 3764 | info = kzalloc(sizeof(SLMP_INFO), |
1da177e4 LT |
3765 | GFP_KERNEL); |
3766 | ||
3767 | if (!info) { | |
3768 | printk("%s(%d) Error can't allocate device instance data for adapter %d, port %d\n", | |
3769 | __FILE__,__LINE__, adapter_num, port_num); | |
3770 | } else { | |
44b7d1b3 | 3771 | tty_port_init(&info->port); |
31f35939 | 3772 | info->port.ops = &port_ops; |
1da177e4 | 3773 | info->magic = MGSL_MAGIC; |
c4028958 | 3774 | INIT_WORK(&info->task, bh_handler); |
1da177e4 | 3775 | info->max_frame_size = 4096; |
44b7d1b3 AC |
3776 | info->port.close_delay = 5*HZ/10; |
3777 | info->port.closing_wait = 30*HZ; | |
1da177e4 LT |
3778 | init_waitqueue_head(&info->status_event_wait_q); |
3779 | init_waitqueue_head(&info->event_wait_q); | |
3780 | spin_lock_init(&info->netlock); | |
3781 | memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS)); | |
3782 | info->idle_mode = HDLC_TXIDLE_FLAGS; | |
3783 | info->adapter_num = adapter_num; | |
3784 | info->port_num = port_num; | |
3785 | ||
3786 | /* Copy configuration info to device instance data */ | |
3787 | info->irq_level = pdev->irq; | |
3788 | info->phys_lcr_base = pci_resource_start(pdev,0); | |
3789 | info->phys_sca_base = pci_resource_start(pdev,2); | |
3790 | info->phys_memory_base = pci_resource_start(pdev,3); | |
3791 | info->phys_statctrl_base = pci_resource_start(pdev,4); | |
3792 | ||
3793 | /* Because veremap only works on page boundaries we must map | |
3794 | * a larger area than is actually implemented for the LCR | |
3795 | * memory range. We map a full page starting at the page boundary. | |
3796 | */ | |
3797 | info->lcr_offset = info->phys_lcr_base & (PAGE_SIZE-1); | |
3798 | info->phys_lcr_base &= ~(PAGE_SIZE-1); | |
3799 | ||
3800 | info->sca_offset = info->phys_sca_base & (PAGE_SIZE-1); | |
3801 | info->phys_sca_base &= ~(PAGE_SIZE-1); | |
3802 | ||
3803 | info->statctrl_offset = info->phys_statctrl_base & (PAGE_SIZE-1); | |
3804 | info->phys_statctrl_base &= ~(PAGE_SIZE-1); | |
3805 | ||
3806 | info->bus_type = MGSL_BUS_TYPE_PCI; | |
0f2ed4c6 | 3807 | info->irq_flags = IRQF_SHARED; |
1da177e4 | 3808 | |
40565f19 JS |
3809 | setup_timer(&info->tx_timer, tx_timeout, (unsigned long)info); |
3810 | setup_timer(&info->status_timer, status_timeout, | |
3811 | (unsigned long)info); | |
1da177e4 LT |
3812 | |
3813 | /* Store the PCI9050 misc control register value because a flaw | |
3814 | * in the PCI9050 prevents LCR registers from being read if | |
3815 | * BIOS assigns an LCR base address with bit 7 set. | |
3816 | * | |
3817 | * Only the misc control register is accessed for which only | |
3818 | * write access is needed, so set an initial value and change | |
3819 | * bits to the device instance data as we write the value | |
3820 | * to the actual misc control register. | |
3821 | */ | |
3822 | info->misc_ctrl_value = 0x087e4546; | |
3823 | ||
3824 | /* initial port state is unknown - if startup errors | |
3825 | * occur, init_error will be set to indicate the | |
3826 | * problem. Once the port is fully initialized, | |
3827 | * this value will be set to 0 to indicate the | |
3828 | * port is available. | |
3829 | */ | |
3830 | info->init_error = -1; | |
3831 | } | |
3832 | ||
3833 | return info; | |
3834 | } | |
3835 | ||
ce9f9f73 | 3836 | static void device_init(int adapter_num, struct pci_dev *pdev) |
1da177e4 LT |
3837 | { |
3838 | SLMP_INFO *port_array[SCA_MAX_PORTS]; | |
3839 | int port; | |
3840 | ||
3841 | /* allocate device instances for up to SCA_MAX_PORTS devices */ | |
3842 | for ( port = 0; port < SCA_MAX_PORTS; ++port ) { | |
3843 | port_array[port] = alloc_dev(adapter_num,port,pdev); | |
3844 | if( port_array[port] == NULL ) { | |
3845 | for ( --port; port >= 0; --port ) | |
3846 | kfree(port_array[port]); | |
3847 | return; | |
3848 | } | |
3849 | } | |
3850 | ||
3851 | /* give copy of port_array to all ports and add to device list */ | |
3852 | for ( port = 0; port < SCA_MAX_PORTS; ++port ) { | |
3853 | memcpy(port_array[port]->port_array,port_array,sizeof(port_array)); | |
3854 | add_device( port_array[port] ); | |
3855 | spin_lock_init(&port_array[port]->lock); | |
3856 | } | |
3857 | ||
3858 | /* Allocate and claim adapter resources */ | |
3859 | if ( !claim_resources(port_array[0]) ) { | |
3860 | ||
3861 | alloc_dma_bufs(port_array[0]); | |
3862 | ||
3863 | /* copy resource information from first port to others */ | |
3864 | for ( port = 1; port < SCA_MAX_PORTS; ++port ) { | |
3865 | port_array[port]->lock = port_array[0]->lock; | |
3866 | port_array[port]->irq_level = port_array[0]->irq_level; | |
3867 | port_array[port]->memory_base = port_array[0]->memory_base; | |
3868 | port_array[port]->sca_base = port_array[0]->sca_base; | |
3869 | port_array[port]->statctrl_base = port_array[0]->statctrl_base; | |
3870 | port_array[port]->lcr_base = port_array[0]->lcr_base; | |
3871 | alloc_dma_bufs(port_array[port]); | |
3872 | } | |
3873 | ||
3874 | if ( request_irq(port_array[0]->irq_level, | |
3875 | synclinkmp_interrupt, | |
3876 | port_array[0]->irq_flags, | |
3877 | port_array[0]->device_name, | |
3878 | port_array[0]) < 0 ) { | |
3879 | printk( "%s(%d):%s Cant request interrupt, IRQ=%d\n", | |
3880 | __FILE__,__LINE__, | |
3881 | port_array[0]->device_name, | |
3882 | port_array[0]->irq_level ); | |
3883 | } | |
3884 | else { | |
0fab6de0 | 3885 | port_array[0]->irq_requested = true; |
1da177e4 LT |
3886 | adapter_test(port_array[0]); |
3887 | } | |
3888 | } | |
3889 | } | |
3890 | ||
b68e31d0 | 3891 | static const struct tty_operations ops = { |
1da177e4 LT |
3892 | .open = open, |
3893 | .close = close, | |
3894 | .write = write, | |
3895 | .put_char = put_char, | |
3896 | .flush_chars = flush_chars, | |
3897 | .write_room = write_room, | |
3898 | .chars_in_buffer = chars_in_buffer, | |
3899 | .flush_buffer = flush_buffer, | |
3900 | .ioctl = ioctl, | |
3901 | .throttle = throttle, | |
3902 | .unthrottle = unthrottle, | |
3903 | .send_xchar = send_xchar, | |
3904 | .break_ctl = set_break, | |
3905 | .wait_until_sent = wait_until_sent, | |
1da177e4 LT |
3906 | .set_termios = set_termios, |
3907 | .stop = tx_hold, | |
3908 | .start = tx_release, | |
3909 | .hangup = hangup, | |
3910 | .tiocmget = tiocmget, | |
3911 | .tiocmset = tiocmset, | |
e6c8dd8a | 3912 | .proc_fops = &synclinkmp_proc_fops, |
1da177e4 LT |
3913 | }; |
3914 | ||
31f35939 | 3915 | |
1da177e4 LT |
3916 | static void synclinkmp_cleanup(void) |
3917 | { | |
3918 | int rc; | |
3919 | SLMP_INFO *info; | |
3920 | SLMP_INFO *tmp; | |
3921 | ||
3922 | printk("Unloading %s %s\n", driver_name, driver_version); | |
3923 | ||
3924 | if (serial_driver) { | |
3925 | if ((rc = tty_unregister_driver(serial_driver))) | |
3926 | printk("%s(%d) failed to unregister tty driver err=%d\n", | |
3927 | __FILE__,__LINE__,rc); | |
3928 | put_tty_driver(serial_driver); | |
3929 | } | |
3930 | ||
3931 | /* reset devices */ | |
3932 | info = synclinkmp_device_list; | |
3933 | while(info) { | |
3934 | reset_port(info); | |
3935 | info = info->next_device; | |
3936 | } | |
3937 | ||
3938 | /* release devices */ | |
3939 | info = synclinkmp_device_list; | |
3940 | while(info) { | |
af69c7f9 | 3941 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
3942 | hdlcdev_exit(info); |
3943 | #endif | |
3944 | free_dma_bufs(info); | |
3945 | free_tmp_rx_buf(info); | |
3946 | if ( info->port_num == 0 ) { | |
3947 | if (info->sca_base) | |
3948 | write_reg(info, LPR, 1); /* set low power mode */ | |
3949 | release_resources(info); | |
3950 | } | |
3951 | tmp = info; | |
3952 | info = info->next_device; | |
3953 | kfree(tmp); | |
3954 | } | |
3955 | ||
3956 | pci_unregister_driver(&synclinkmp_pci_driver); | |
3957 | } | |
3958 | ||
3959 | /* Driver initialization entry point. | |
3960 | */ | |
3961 | ||
3962 | static int __init synclinkmp_init(void) | |
3963 | { | |
3964 | int rc; | |
3965 | ||
3966 | if (break_on_load) { | |
3967 | synclinkmp_get_text_ptr(); | |
3968 | BREAKPOINT(); | |
3969 | } | |
3970 | ||
3971 | printk("%s %s\n", driver_name, driver_version); | |
3972 | ||
3973 | if ((rc = pci_register_driver(&synclinkmp_pci_driver)) < 0) { | |
3974 | printk("%s:failed to register PCI driver, error=%d\n",__FILE__,rc); | |
3975 | return rc; | |
3976 | } | |
3977 | ||
3978 | serial_driver = alloc_tty_driver(128); | |
3979 | if (!serial_driver) { | |
3980 | rc = -ENOMEM; | |
3981 | goto error; | |
3982 | } | |
3983 | ||
3984 | /* Initialize the tty_driver structure */ | |
3985 | ||
3986 | serial_driver->owner = THIS_MODULE; | |
3987 | serial_driver->driver_name = "synclinkmp"; | |
3988 | serial_driver->name = "ttySLM"; | |
3989 | serial_driver->major = ttymajor; | |
3990 | serial_driver->minor_start = 64; | |
3991 | serial_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
3992 | serial_driver->subtype = SERIAL_TYPE_NORMAL; | |
3993 | serial_driver->init_termios = tty_std_termios; | |
3994 | serial_driver->init_termios.c_cflag = | |
3995 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
606d099c AC |
3996 | serial_driver->init_termios.c_ispeed = 9600; |
3997 | serial_driver->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
3998 | serial_driver->flags = TTY_DRIVER_REAL_RAW; |
3999 | tty_set_operations(serial_driver, &ops); | |
4000 | if ((rc = tty_register_driver(serial_driver)) < 0) { | |
4001 | printk("%s(%d):Couldn't register serial driver\n", | |
4002 | __FILE__,__LINE__); | |
4003 | put_tty_driver(serial_driver); | |
4004 | serial_driver = NULL; | |
4005 | goto error; | |
4006 | } | |
4007 | ||
4008 | printk("%s %s, tty major#%d\n", | |
4009 | driver_name, driver_version, | |
4010 | serial_driver->major); | |
4011 | ||
4012 | return 0; | |
4013 | ||
4014 | error: | |
4015 | synclinkmp_cleanup(); | |
4016 | return rc; | |
4017 | } | |
4018 | ||
4019 | static void __exit synclinkmp_exit(void) | |
4020 | { | |
4021 | synclinkmp_cleanup(); | |
4022 | } | |
4023 | ||
4024 | module_init(synclinkmp_init); | |
4025 | module_exit(synclinkmp_exit); | |
4026 | ||
4027 | /* Set the port for internal loopback mode. | |
4028 | * The TxCLK and RxCLK signals are generated from the BRG and | |
4029 | * the TxD is looped back to the RxD internally. | |
4030 | */ | |
ce9f9f73 | 4031 | static void enable_loopback(SLMP_INFO *info, int enable) |
1da177e4 LT |
4032 | { |
4033 | if (enable) { | |
4034 | /* MD2 (Mode Register 2) | |
4035 | * 01..00 CNCT<1..0> Channel Connection 11=Local Loopback | |
4036 | */ | |
4037 | write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) | (BIT1 + BIT0))); | |
4038 | ||
4039 | /* degate external TxC clock source */ | |
4040 | info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2)); | |
4041 | write_control_reg(info); | |
4042 | ||
4043 | /* RXS/TXS (Rx/Tx clock source) | |
4044 | * 07 Reserved, must be 0 | |
4045 | * 06..04 Clock Source, 100=BRG | |
4046 | * 03..00 Clock Divisor, 0000=1 | |
4047 | */ | |
4048 | write_reg(info, RXS, 0x40); | |
4049 | write_reg(info, TXS, 0x40); | |
4050 | ||
4051 | } else { | |
4052 | /* MD2 (Mode Register 2) | |
4053 | * 01..00 CNCT<1..0> Channel connection, 0=normal | |
4054 | */ | |
4055 | write_reg(info, MD2, (unsigned char)(read_reg(info, MD2) & ~(BIT1 + BIT0))); | |
4056 | ||
4057 | /* RXS/TXS (Rx/Tx clock source) | |
4058 | * 07 Reserved, must be 0 | |
4059 | * 06..04 Clock Source, 000=RxC/TxC Pin | |
4060 | * 03..00 Clock Divisor, 0000=1 | |
4061 | */ | |
4062 | write_reg(info, RXS, 0x00); | |
4063 | write_reg(info, TXS, 0x00); | |
4064 | } | |
4065 | ||
4066 | /* set LinkSpeed if available, otherwise default to 2Mbps */ | |
4067 | if (info->params.clock_speed) | |
4068 | set_rate(info, info->params.clock_speed); | |
4069 | else | |
4070 | set_rate(info, 3686400); | |
4071 | } | |
4072 | ||
4073 | /* Set the baud rate register to the desired speed | |
4074 | * | |
4075 | * data_rate data rate of clock in bits per second | |
4076 | * A data rate of 0 disables the AUX clock. | |
4077 | */ | |
ce9f9f73 | 4078 | static void set_rate( SLMP_INFO *info, u32 data_rate ) |
1da177e4 LT |
4079 | { |
4080 | u32 TMCValue; | |
4081 | unsigned char BRValue; | |
4082 | u32 Divisor=0; | |
4083 | ||
4084 | /* fBRG = fCLK/(TMC * 2^BR) | |
4085 | */ | |
4086 | if (data_rate != 0) { | |
4087 | Divisor = 14745600/data_rate; | |
4088 | if (!Divisor) | |
4089 | Divisor = 1; | |
4090 | ||
4091 | TMCValue = Divisor; | |
4092 | ||
4093 | BRValue = 0; | |
4094 | if (TMCValue != 1 && TMCValue != 2) { | |
4095 | /* BRValue of 0 provides 50/50 duty cycle *only* when | |
4096 | * TMCValue is 1 or 2. BRValue of 1 to 9 always provides | |
4097 | * 50/50 duty cycle. | |
4098 | */ | |
4099 | BRValue = 1; | |
4100 | TMCValue >>= 1; | |
4101 | } | |
4102 | ||
4103 | /* while TMCValue is too big for TMC register, divide | |
4104 | * by 2 and increment BR exponent. | |
4105 | */ | |
4106 | for(; TMCValue > 256 && BRValue < 10; BRValue++) | |
4107 | TMCValue >>= 1; | |
4108 | ||
4109 | write_reg(info, TXS, | |
4110 | (unsigned char)((read_reg(info, TXS) & 0xf0) | BRValue)); | |
4111 | write_reg(info, RXS, | |
4112 | (unsigned char)((read_reg(info, RXS) & 0xf0) | BRValue)); | |
4113 | write_reg(info, TMC, (unsigned char)TMCValue); | |
4114 | } | |
4115 | else { | |
4116 | write_reg(info, TXS,0); | |
4117 | write_reg(info, RXS,0); | |
4118 | write_reg(info, TMC, 0); | |
4119 | } | |
4120 | } | |
4121 | ||
4122 | /* Disable receiver | |
4123 | */ | |
ce9f9f73 | 4124 | static void rx_stop(SLMP_INFO *info) |
1da177e4 LT |
4125 | { |
4126 | if (debug_level >= DEBUG_LEVEL_ISR) | |
4127 | printk("%s(%d):%s rx_stop()\n", | |
4128 | __FILE__,__LINE__, info->device_name ); | |
4129 | ||
4130 | write_reg(info, CMD, RXRESET); | |
4131 | ||
4132 | info->ie0_value &= ~RXRDYE; | |
4133 | write_reg(info, IE0, info->ie0_value); /* disable Rx data interrupts */ | |
4134 | ||
4135 | write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */ | |
4136 | write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */ | |
4137 | write_reg(info, RXDMA + DIR, 0); /* disable Rx DMA interrupts */ | |
4138 | ||
0fab6de0 JP |
4139 | info->rx_enabled = false; |
4140 | info->rx_overflow = false; | |
1da177e4 LT |
4141 | } |
4142 | ||
4143 | /* enable the receiver | |
4144 | */ | |
ce9f9f73 | 4145 | static void rx_start(SLMP_INFO *info) |
1da177e4 LT |
4146 | { |
4147 | int i; | |
4148 | ||
4149 | if (debug_level >= DEBUG_LEVEL_ISR) | |
4150 | printk("%s(%d):%s rx_start()\n", | |
4151 | __FILE__,__LINE__, info->device_name ); | |
4152 | ||
4153 | write_reg(info, CMD, RXRESET); | |
4154 | ||
4155 | if ( info->params.mode == MGSL_MODE_HDLC ) { | |
4156 | /* HDLC, disabe IRQ on rxdata */ | |
4157 | info->ie0_value &= ~RXRDYE; | |
4158 | write_reg(info, IE0, info->ie0_value); | |
4159 | ||
4160 | /* Reset all Rx DMA buffers and program rx dma */ | |
4161 | write_reg(info, RXDMA + DSR, 0); /* disable Rx DMA */ | |
4162 | write_reg(info, RXDMA + DCMD, SWABORT); /* reset/init Rx DMA */ | |
4163 | ||
4164 | for (i = 0; i < info->rx_buf_count; i++) { | |
4165 | info->rx_buf_list[i].status = 0xff; | |
4166 | ||
4167 | // throttle to 4 shared memory writes at a time to prevent | |
4168 | // hogging local bus (keep latency time for DMA requests low). | |
4169 | if (!(i % 4)) | |
4170 | read_status_reg(info); | |
4171 | } | |
4172 | info->current_rx_buf = 0; | |
4173 | ||
4174 | /* set current/1st descriptor address */ | |
4175 | write_reg16(info, RXDMA + CDA, | |
4176 | info->rx_buf_list_ex[0].phys_entry); | |
4177 | ||
4178 | /* set new last rx descriptor address */ | |
4179 | write_reg16(info, RXDMA + EDA, | |
4180 | info->rx_buf_list_ex[info->rx_buf_count - 1].phys_entry); | |
4181 | ||
4182 | /* set buffer length (shared by all rx dma data buffers) */ | |
4183 | write_reg16(info, RXDMA + BFL, SCABUFSIZE); | |
4184 | ||
4185 | write_reg(info, RXDMA + DIR, 0x60); /* enable Rx DMA interrupts (EOM/BOF) */ | |
4186 | write_reg(info, RXDMA + DSR, 0xf2); /* clear Rx DMA IRQs, enable Rx DMA */ | |
4187 | } else { | |
4188 | /* async, enable IRQ on rxdata */ | |
4189 | info->ie0_value |= RXRDYE; | |
4190 | write_reg(info, IE0, info->ie0_value); | |
4191 | } | |
4192 | ||
4193 | write_reg(info, CMD, RXENABLE); | |
4194 | ||
0fab6de0 JP |
4195 | info->rx_overflow = false; |
4196 | info->rx_enabled = true; | |
1da177e4 LT |
4197 | } |
4198 | ||
4199 | /* Enable the transmitter and send a transmit frame if | |
4200 | * one is loaded in the DMA buffers. | |
4201 | */ | |
ce9f9f73 | 4202 | static void tx_start(SLMP_INFO *info) |
1da177e4 LT |
4203 | { |
4204 | if (debug_level >= DEBUG_LEVEL_ISR) | |
4205 | printk("%s(%d):%s tx_start() tx_count=%d\n", | |
4206 | __FILE__,__LINE__, info->device_name,info->tx_count ); | |
4207 | ||
4208 | if (!info->tx_enabled ) { | |
4209 | write_reg(info, CMD, TXRESET); | |
4210 | write_reg(info, CMD, TXENABLE); | |
0fab6de0 | 4211 | info->tx_enabled = true; |
1da177e4 LT |
4212 | } |
4213 | ||
4214 | if ( info->tx_count ) { | |
4215 | ||
4216 | /* If auto RTS enabled and RTS is inactive, then assert */ | |
4217 | /* RTS and set a flag indicating that the driver should */ | |
4218 | /* negate RTS when the transmission completes. */ | |
4219 | ||
0fab6de0 | 4220 | info->drop_rts_on_tx_done = false; |
1da177e4 LT |
4221 | |
4222 | if (info->params.mode != MGSL_MODE_ASYNC) { | |
4223 | ||
4224 | if ( info->params.flags & HDLC_FLAG_AUTO_RTS ) { | |
4225 | get_signals( info ); | |
4226 | if ( !(info->serial_signals & SerialSignal_RTS) ) { | |
4227 | info->serial_signals |= SerialSignal_RTS; | |
4228 | set_signals( info ); | |
0fab6de0 | 4229 | info->drop_rts_on_tx_done = true; |
1da177e4 LT |
4230 | } |
4231 | } | |
4232 | ||
4233 | write_reg16(info, TRC0, | |
4234 | (unsigned short)(((tx_negate_fifo_level-1)<<8) + tx_active_fifo_level)); | |
4235 | ||
4236 | write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */ | |
4237 | write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */ | |
4238 | ||
4239 | /* set TX CDA (current descriptor address) */ | |
4240 | write_reg16(info, TXDMA + CDA, | |
4241 | info->tx_buf_list_ex[0].phys_entry); | |
4242 | ||
4243 | /* set TX EDA (last descriptor address) */ | |
4244 | write_reg16(info, TXDMA + EDA, | |
4245 | info->tx_buf_list_ex[info->last_tx_buf].phys_entry); | |
4246 | ||
4247 | /* enable underrun IRQ */ | |
4248 | info->ie1_value &= ~IDLE; | |
4249 | info->ie1_value |= UDRN; | |
4250 | write_reg(info, IE1, info->ie1_value); | |
4251 | write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); | |
4252 | ||
4253 | write_reg(info, TXDMA + DIR, 0x40); /* enable Tx DMA interrupts (EOM) */ | |
4254 | write_reg(info, TXDMA + DSR, 0xf2); /* clear Tx DMA IRQs, enable Tx DMA */ | |
4255 | ||
40565f19 JS |
4256 | mod_timer(&info->tx_timer, jiffies + |
4257 | msecs_to_jiffies(5000)); | |
1da177e4 LT |
4258 | } |
4259 | else { | |
4260 | tx_load_fifo(info); | |
4261 | /* async, enable IRQ on txdata */ | |
4262 | info->ie0_value |= TXRDYE; | |
4263 | write_reg(info, IE0, info->ie0_value); | |
4264 | } | |
4265 | ||
0fab6de0 | 4266 | info->tx_active = true; |
1da177e4 LT |
4267 | } |
4268 | } | |
4269 | ||
4270 | /* stop the transmitter and DMA | |
4271 | */ | |
ce9f9f73 | 4272 | static void tx_stop( SLMP_INFO *info ) |
1da177e4 LT |
4273 | { |
4274 | if (debug_level >= DEBUG_LEVEL_ISR) | |
4275 | printk("%s(%d):%s tx_stop()\n", | |
4276 | __FILE__,__LINE__, info->device_name ); | |
4277 | ||
4278 | del_timer(&info->tx_timer); | |
4279 | ||
4280 | write_reg(info, TXDMA + DSR, 0); /* disable DMA channel */ | |
4281 | write_reg(info, TXDMA + DCMD, SWABORT); /* reset/init DMA channel */ | |
4282 | ||
4283 | write_reg(info, CMD, TXRESET); | |
4284 | ||
4285 | info->ie1_value &= ~(UDRN + IDLE); | |
4286 | write_reg(info, IE1, info->ie1_value); /* disable tx status interrupts */ | |
4287 | write_reg(info, SR1, (unsigned char)(IDLE + UDRN)); /* clear pending */ | |
4288 | ||
4289 | info->ie0_value &= ~TXRDYE; | |
4290 | write_reg(info, IE0, info->ie0_value); /* disable tx data interrupts */ | |
4291 | ||
0fab6de0 JP |
4292 | info->tx_enabled = false; |
4293 | info->tx_active = false; | |
1da177e4 LT |
4294 | } |
4295 | ||
4296 | /* Fill the transmit FIFO until the FIFO is full or | |
4297 | * there is no more data to load. | |
4298 | */ | |
ce9f9f73 | 4299 | static void tx_load_fifo(SLMP_INFO *info) |
1da177e4 LT |
4300 | { |
4301 | u8 TwoBytes[2]; | |
4302 | ||
4303 | /* do nothing is now tx data available and no XON/XOFF pending */ | |
4304 | ||
4305 | if ( !info->tx_count && !info->x_char ) | |
4306 | return; | |
4307 | ||
4308 | /* load the Transmit FIFO until FIFOs full or all data sent */ | |
4309 | ||
4310 | while( info->tx_count && (read_reg(info,SR0) & BIT1) ) { | |
4311 | ||
4312 | /* there is more space in the transmit FIFO and */ | |
4313 | /* there is more data in transmit buffer */ | |
4314 | ||
4315 | if ( (info->tx_count > 1) && !info->x_char ) { | |
4316 | /* write 16-bits */ | |
4317 | TwoBytes[0] = info->tx_buf[info->tx_get++]; | |
4318 | if (info->tx_get >= info->max_frame_size) | |
4319 | info->tx_get -= info->max_frame_size; | |
4320 | TwoBytes[1] = info->tx_buf[info->tx_get++]; | |
4321 | if (info->tx_get >= info->max_frame_size) | |
4322 | info->tx_get -= info->max_frame_size; | |
4323 | ||
4324 | write_reg16(info, TRB, *((u16 *)TwoBytes)); | |
4325 | ||
4326 | info->tx_count -= 2; | |
4327 | info->icount.tx += 2; | |
4328 | } else { | |
4329 | /* only 1 byte left to transmit or 1 FIFO slot left */ | |
4330 | ||
4331 | if (info->x_char) { | |
4332 | /* transmit pending high priority char */ | |
4333 | write_reg(info, TRB, info->x_char); | |
4334 | info->x_char = 0; | |
4335 | } else { | |
4336 | write_reg(info, TRB, info->tx_buf[info->tx_get++]); | |
4337 | if (info->tx_get >= info->max_frame_size) | |
4338 | info->tx_get -= info->max_frame_size; | |
4339 | info->tx_count--; | |
4340 | } | |
4341 | info->icount.tx++; | |
4342 | } | |
4343 | } | |
4344 | } | |
4345 | ||
4346 | /* Reset a port to a known state | |
4347 | */ | |
ce9f9f73 | 4348 | static void reset_port(SLMP_INFO *info) |
1da177e4 LT |
4349 | { |
4350 | if (info->sca_base) { | |
4351 | ||
4352 | tx_stop(info); | |
4353 | rx_stop(info); | |
4354 | ||
4355 | info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS); | |
4356 | set_signals(info); | |
4357 | ||
4358 | /* disable all port interrupts */ | |
4359 | info->ie0_value = 0; | |
4360 | info->ie1_value = 0; | |
4361 | info->ie2_value = 0; | |
4362 | write_reg(info, IE0, info->ie0_value); | |
4363 | write_reg(info, IE1, info->ie1_value); | |
4364 | write_reg(info, IE2, info->ie2_value); | |
4365 | ||
4366 | write_reg(info, CMD, CHRESET); | |
4367 | } | |
4368 | } | |
4369 | ||
4370 | /* Reset all the ports to a known state. | |
4371 | */ | |
ce9f9f73 | 4372 | static void reset_adapter(SLMP_INFO *info) |
1da177e4 LT |
4373 | { |
4374 | int i; | |
4375 | ||
4376 | for ( i=0; i < SCA_MAX_PORTS; ++i) { | |
4377 | if (info->port_array[i]) | |
4378 | reset_port(info->port_array[i]); | |
4379 | } | |
4380 | } | |
4381 | ||
4382 | /* Program port for asynchronous communications. | |
4383 | */ | |
ce9f9f73 | 4384 | static void async_mode(SLMP_INFO *info) |
1da177e4 LT |
4385 | { |
4386 | ||
4387 | unsigned char RegValue; | |
4388 | ||
4389 | tx_stop(info); | |
4390 | rx_stop(info); | |
4391 | ||
4392 | /* MD0, Mode Register 0 | |
4393 | * | |
4394 | * 07..05 PRCTL<2..0>, Protocol Mode, 000=async | |
4395 | * 04 AUTO, Auto-enable (RTS/CTS/DCD) | |
4396 | * 03 Reserved, must be 0 | |
4397 | * 02 CRCCC, CRC Calculation, 0=disabled | |
4398 | * 01..00 STOP<1..0> Stop bits (00=1,10=2) | |
4399 | * | |
4400 | * 0000 0000 | |
4401 | */ | |
4402 | RegValue = 0x00; | |
4403 | if (info->params.stop_bits != 1) | |
4404 | RegValue |= BIT1; | |
4405 | write_reg(info, MD0, RegValue); | |
4406 | ||
4407 | /* MD1, Mode Register 1 | |
4408 | * | |
4409 | * 07..06 BRATE<1..0>, bit rate, 00=1/1 01=1/16 10=1/32 11=1/64 | |
4410 | * 05..04 TXCHR<1..0>, tx char size, 00=8 bits,01=7,10=6,11=5 | |
4411 | * 03..02 RXCHR<1..0>, rx char size | |
4412 | * 01..00 PMPM<1..0>, Parity mode, 00=none 10=even 11=odd | |
4413 | * | |
4414 | * 0100 0000 | |
4415 | */ | |
4416 | RegValue = 0x40; | |
4417 | switch (info->params.data_bits) { | |
4418 | case 7: RegValue |= BIT4 + BIT2; break; | |
4419 | case 6: RegValue |= BIT5 + BIT3; break; | |
4420 | case 5: RegValue |= BIT5 + BIT4 + BIT3 + BIT2; break; | |
4421 | } | |
4422 | if (info->params.parity != ASYNC_PARITY_NONE) { | |
4423 | RegValue |= BIT1; | |
4424 | if (info->params.parity == ASYNC_PARITY_ODD) | |
4425 | RegValue |= BIT0; | |
4426 | } | |
4427 | write_reg(info, MD1, RegValue); | |
4428 | ||
4429 | /* MD2, Mode Register 2 | |
4430 | * | |
4431 | * 07..02 Reserved, must be 0 | |
6e8dcee3 | 4432 | * 01..00 CNCT<1..0> Channel connection, 00=normal 11=local loopback |
1da177e4 LT |
4433 | * |
4434 | * 0000 0000 | |
4435 | */ | |
4436 | RegValue = 0x00; | |
6e8dcee3 PF |
4437 | if (info->params.loopback) |
4438 | RegValue |= (BIT1 + BIT0); | |
1da177e4 LT |
4439 | write_reg(info, MD2, RegValue); |
4440 | ||
4441 | /* RXS, Receive clock source | |
4442 | * | |
4443 | * 07 Reserved, must be 0 | |
4444 | * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL | |
4445 | * 03..00 RXBR<3..0>, rate divisor, 0000=1 | |
4446 | */ | |
4447 | RegValue=BIT6; | |
4448 | write_reg(info, RXS, RegValue); | |
4449 | ||
4450 | /* TXS, Transmit clock source | |
4451 | * | |
4452 | * 07 Reserved, must be 0 | |
4453 | * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock | |
4454 | * 03..00 RXBR<3..0>, rate divisor, 0000=1 | |
4455 | */ | |
4456 | RegValue=BIT6; | |
4457 | write_reg(info, TXS, RegValue); | |
4458 | ||
4459 | /* Control Register | |
4460 | * | |
4461 | * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out | |
4462 | */ | |
4463 | info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2)); | |
4464 | write_control_reg(info); | |
4465 | ||
4466 | tx_set_idle(info); | |
4467 | ||
4468 | /* RRC Receive Ready Control 0 | |
4469 | * | |
4470 | * 07..05 Reserved, must be 0 | |
4471 | * 04..00 RRC<4..0> Rx FIFO trigger active 0x00 = 1 byte | |
4472 | */ | |
4473 | write_reg(info, RRC, 0x00); | |
4474 | ||
4475 | /* TRC0 Transmit Ready Control 0 | |
4476 | * | |
4477 | * 07..05 Reserved, must be 0 | |
4478 | * 04..00 TRC<4..0> Tx FIFO trigger active 0x10 = 16 bytes | |
4479 | */ | |
4480 | write_reg(info, TRC0, 0x10); | |
4481 | ||
4482 | /* TRC1 Transmit Ready Control 1 | |
4483 | * | |
4484 | * 07..05 Reserved, must be 0 | |
4485 | * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1e = 31 bytes (full-1) | |
4486 | */ | |
4487 | write_reg(info, TRC1, 0x1e); | |
4488 | ||
4489 | /* CTL, MSCI control register | |
4490 | * | |
4491 | * 07..06 Reserved, set to 0 | |
4492 | * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC) | |
4493 | * 04 IDLC, idle control, 0=mark 1=idle register | |
4494 | * 03 BRK, break, 0=off 1 =on (async) | |
4495 | * 02 SYNCLD, sync char load enable (BSC) 1=enabled | |
4496 | * 01 GOP, go active on poll (LOOP mode) 1=enabled | |
4497 | * 00 RTS, RTS output control, 0=active 1=inactive | |
4498 | * | |
4499 | * 0001 0001 | |
4500 | */ | |
4501 | RegValue = 0x10; | |
4502 | if (!(info->serial_signals & SerialSignal_RTS)) | |
4503 | RegValue |= 0x01; | |
4504 | write_reg(info, CTL, RegValue); | |
4505 | ||
4506 | /* enable status interrupts */ | |
4507 | info->ie0_value |= TXINTE + RXINTE; | |
4508 | write_reg(info, IE0, info->ie0_value); | |
4509 | ||
4510 | /* enable break detect interrupt */ | |
4511 | info->ie1_value = BRKD; | |
4512 | write_reg(info, IE1, info->ie1_value); | |
4513 | ||
4514 | /* enable rx overrun interrupt */ | |
4515 | info->ie2_value = OVRN; | |
4516 | write_reg(info, IE2, info->ie2_value); | |
4517 | ||
4518 | set_rate( info, info->params.data_rate * 16 ); | |
1da177e4 LT |
4519 | } |
4520 | ||
4521 | /* Program the SCA for HDLC communications. | |
4522 | */ | |
ce9f9f73 | 4523 | static void hdlc_mode(SLMP_INFO *info) |
1da177e4 LT |
4524 | { |
4525 | unsigned char RegValue; | |
4526 | u32 DpllDivisor; | |
4527 | ||
4528 | // Can't use DPLL because SCA outputs recovered clock on RxC when | |
4529 | // DPLL mode selected. This causes output contention with RxC receiver. | |
4530 | // Use of DPLL would require external hardware to disable RxC receiver | |
4531 | // when DPLL mode selected. | |
4532 | info->params.flags &= ~(HDLC_FLAG_TXC_DPLL + HDLC_FLAG_RXC_DPLL); | |
4533 | ||
4534 | /* disable DMA interrupts */ | |
4535 | write_reg(info, TXDMA + DIR, 0); | |
4536 | write_reg(info, RXDMA + DIR, 0); | |
4537 | ||
4538 | /* MD0, Mode Register 0 | |
4539 | * | |
4540 | * 07..05 PRCTL<2..0>, Protocol Mode, 100=HDLC | |
4541 | * 04 AUTO, Auto-enable (RTS/CTS/DCD) | |
4542 | * 03 Reserved, must be 0 | |
4543 | * 02 CRCCC, CRC Calculation, 1=enabled | |
4544 | * 01 CRC1, CRC selection, 0=CRC-16,1=CRC-CCITT-16 | |
4545 | * 00 CRC0, CRC initial value, 1 = all 1s | |
4546 | * | |
4547 | * 1000 0001 | |
4548 | */ | |
4549 | RegValue = 0x81; | |
4550 | if (info->params.flags & HDLC_FLAG_AUTO_CTS) | |
4551 | RegValue |= BIT4; | |
4552 | if (info->params.flags & HDLC_FLAG_AUTO_DCD) | |
4553 | RegValue |= BIT4; | |
4554 | if (info->params.crc_type == HDLC_CRC_16_CCITT) | |
4555 | RegValue |= BIT2 + BIT1; | |
4556 | write_reg(info, MD0, RegValue); | |
4557 | ||
4558 | /* MD1, Mode Register 1 | |
4559 | * | |
4560 | * 07..06 ADDRS<1..0>, Address detect, 00=no addr check | |
4561 | * 05..04 TXCHR<1..0>, tx char size, 00=8 bits | |
4562 | * 03..02 RXCHR<1..0>, rx char size, 00=8 bits | |
4563 | * 01..00 PMPM<1..0>, Parity mode, 00=no parity | |
4564 | * | |
4565 | * 0000 0000 | |
4566 | */ | |
4567 | RegValue = 0x00; | |
4568 | write_reg(info, MD1, RegValue); | |
4569 | ||
4570 | /* MD2, Mode Register 2 | |
4571 | * | |
4572 | * 07 NRZFM, 0=NRZ, 1=FM | |
4573 | * 06..05 CODE<1..0> Encoding, 00=NRZ | |
4574 | * 04..03 DRATE<1..0> DPLL Divisor, 00=8 | |
4575 | * 02 Reserved, must be 0 | |
4576 | * 01..00 CNCT<1..0> Channel connection, 0=normal | |
4577 | * | |
4578 | * 0000 0000 | |
4579 | */ | |
4580 | RegValue = 0x00; | |
4581 | switch(info->params.encoding) { | |
4582 | case HDLC_ENCODING_NRZI: RegValue |= BIT5; break; | |
4583 | case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT7 + BIT5; break; /* aka FM1 */ | |
4584 | case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT7 + BIT6; break; /* aka FM0 */ | |
4585 | case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT7; break; /* aka Manchester */ | |
4586 | #if 0 | |
4587 | case HDLC_ENCODING_NRZB: /* not supported */ | |
4588 | case HDLC_ENCODING_NRZI_MARK: /* not supported */ | |
4589 | case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: /* not supported */ | |
4590 | #endif | |
4591 | } | |
4592 | if ( info->params.flags & HDLC_FLAG_DPLL_DIV16 ) { | |
4593 | DpllDivisor = 16; | |
4594 | RegValue |= BIT3; | |
4595 | } else if ( info->params.flags & HDLC_FLAG_DPLL_DIV8 ) { | |
4596 | DpllDivisor = 8; | |
4597 | } else { | |
4598 | DpllDivisor = 32; | |
4599 | RegValue |= BIT4; | |
4600 | } | |
4601 | write_reg(info, MD2, RegValue); | |
4602 | ||
4603 | ||
4604 | /* RXS, Receive clock source | |
4605 | * | |
4606 | * 07 Reserved, must be 0 | |
4607 | * 06..04 RXCS<2..0>, clock source, 000=RxC Pin, 100=BRG, 110=DPLL | |
4608 | * 03..00 RXBR<3..0>, rate divisor, 0000=1 | |
4609 | */ | |
4610 | RegValue=0; | |
4611 | if (info->params.flags & HDLC_FLAG_RXC_BRG) | |
4612 | RegValue |= BIT6; | |
4613 | if (info->params.flags & HDLC_FLAG_RXC_DPLL) | |
4614 | RegValue |= BIT6 + BIT5; | |
4615 | write_reg(info, RXS, RegValue); | |
4616 | ||
4617 | /* TXS, Transmit clock source | |
4618 | * | |
4619 | * 07 Reserved, must be 0 | |
4620 | * 06..04 RXCS<2..0>, clock source, 000=TxC Pin, 100=BRG, 110=Receive Clock | |
4621 | * 03..00 RXBR<3..0>, rate divisor, 0000=1 | |
4622 | */ | |
4623 | RegValue=0; | |
4624 | if (info->params.flags & HDLC_FLAG_TXC_BRG) | |
4625 | RegValue |= BIT6; | |
4626 | if (info->params.flags & HDLC_FLAG_TXC_DPLL) | |
4627 | RegValue |= BIT6 + BIT5; | |
4628 | write_reg(info, TXS, RegValue); | |
4629 | ||
4630 | if (info->params.flags & HDLC_FLAG_RXC_DPLL) | |
4631 | set_rate(info, info->params.clock_speed * DpllDivisor); | |
4632 | else | |
4633 | set_rate(info, info->params.clock_speed); | |
4634 | ||
4635 | /* GPDATA (General Purpose I/O Data Register) | |
4636 | * | |
4637 | * 6,4,2,0 CLKSEL<3..0>, 0 = TcCLK in, 1 = Auxclk out | |
4638 | */ | |
4639 | if (info->params.flags & HDLC_FLAG_TXC_BRG) | |
4640 | info->port_array[0]->ctrlreg_value |= (BIT0 << (info->port_num * 2)); | |
4641 | else | |
4642 | info->port_array[0]->ctrlreg_value &= ~(BIT0 << (info->port_num * 2)); | |
4643 | write_control_reg(info); | |
4644 | ||
4645 | /* RRC Receive Ready Control 0 | |
4646 | * | |
4647 | * 07..05 Reserved, must be 0 | |
4648 | * 04..00 RRC<4..0> Rx FIFO trigger active | |
4649 | */ | |
4650 | write_reg(info, RRC, rx_active_fifo_level); | |
4651 | ||
4652 | /* TRC0 Transmit Ready Control 0 | |
4653 | * | |
4654 | * 07..05 Reserved, must be 0 | |
4655 | * 04..00 TRC<4..0> Tx FIFO trigger active | |
4656 | */ | |
4657 | write_reg(info, TRC0, tx_active_fifo_level); | |
4658 | ||
4659 | /* TRC1 Transmit Ready Control 1 | |
4660 | * | |
4661 | * 07..05 Reserved, must be 0 | |
4662 | * 04..00 TRC<4..0> Tx FIFO trigger inactive 0x1f = 32 bytes (full) | |
4663 | */ | |
4664 | write_reg(info, TRC1, (unsigned char)(tx_negate_fifo_level - 1)); | |
4665 | ||
4666 | /* DMR, DMA Mode Register | |
4667 | * | |
4668 | * 07..05 Reserved, must be 0 | |
4669 | * 04 TMOD, Transfer Mode: 1=chained-block | |
4670 | * 03 Reserved, must be 0 | |
4671 | * 02 NF, Number of Frames: 1=multi-frame | |
4672 | * 01 CNTE, Frame End IRQ Counter enable: 0=disabled | |
4673 | * 00 Reserved, must be 0 | |
4674 | * | |
4675 | * 0001 0100 | |
4676 | */ | |
4677 | write_reg(info, TXDMA + DMR, 0x14); | |
4678 | write_reg(info, RXDMA + DMR, 0x14); | |
4679 | ||
4680 | /* Set chain pointer base (upper 8 bits of 24 bit addr) */ | |
4681 | write_reg(info, RXDMA + CPB, | |
4682 | (unsigned char)(info->buffer_list_phys >> 16)); | |
4683 | ||
4684 | /* Set chain pointer base (upper 8 bits of 24 bit addr) */ | |
4685 | write_reg(info, TXDMA + CPB, | |
4686 | (unsigned char)(info->buffer_list_phys >> 16)); | |
4687 | ||
4688 | /* enable status interrupts. other code enables/disables | |
4689 | * the individual sources for these two interrupt classes. | |
4690 | */ | |
4691 | info->ie0_value |= TXINTE + RXINTE; | |
4692 | write_reg(info, IE0, info->ie0_value); | |
4693 | ||
4694 | /* CTL, MSCI control register | |
4695 | * | |
4696 | * 07..06 Reserved, set to 0 | |
4697 | * 05 UDRNC, underrun control, 0=abort 1=CRC+flag (HDLC/BSC) | |
4698 | * 04 IDLC, idle control, 0=mark 1=idle register | |
4699 | * 03 BRK, break, 0=off 1 =on (async) | |
4700 | * 02 SYNCLD, sync char load enable (BSC) 1=enabled | |
4701 | * 01 GOP, go active on poll (LOOP mode) 1=enabled | |
4702 | * 00 RTS, RTS output control, 0=active 1=inactive | |
4703 | * | |
4704 | * 0001 0001 | |
4705 | */ | |
4706 | RegValue = 0x10; | |
4707 | if (!(info->serial_signals & SerialSignal_RTS)) | |
4708 | RegValue |= 0x01; | |
4709 | write_reg(info, CTL, RegValue); | |
4710 | ||
4711 | /* preamble not supported ! */ | |
4712 | ||
4713 | tx_set_idle(info); | |
4714 | tx_stop(info); | |
4715 | rx_stop(info); | |
4716 | ||
4717 | set_rate(info, info->params.clock_speed); | |
4718 | ||
4719 | if (info->params.loopback) | |
4720 | enable_loopback(info,1); | |
4721 | } | |
4722 | ||
4723 | /* Set the transmit HDLC idle mode | |
4724 | */ | |
ce9f9f73 | 4725 | static void tx_set_idle(SLMP_INFO *info) |
1da177e4 LT |
4726 | { |
4727 | unsigned char RegValue = 0xff; | |
4728 | ||
4729 | /* Map API idle mode to SCA register bits */ | |
4730 | switch(info->idle_mode) { | |
4731 | case HDLC_TXIDLE_FLAGS: RegValue = 0x7e; break; | |
4732 | case HDLC_TXIDLE_ALT_ZEROS_ONES: RegValue = 0xaa; break; | |
4733 | case HDLC_TXIDLE_ZEROS: RegValue = 0x00; break; | |
4734 | case HDLC_TXIDLE_ONES: RegValue = 0xff; break; | |
4735 | case HDLC_TXIDLE_ALT_MARK_SPACE: RegValue = 0xaa; break; | |
4736 | case HDLC_TXIDLE_SPACE: RegValue = 0x00; break; | |
4737 | case HDLC_TXIDLE_MARK: RegValue = 0xff; break; | |
4738 | } | |
4739 | ||
4740 | write_reg(info, IDL, RegValue); | |
4741 | } | |
4742 | ||
4743 | /* Query the adapter for the state of the V24 status (input) signals. | |
4744 | */ | |
ce9f9f73 | 4745 | static void get_signals(SLMP_INFO *info) |
1da177e4 LT |
4746 | { |
4747 | u16 status = read_reg(info, SR3); | |
4748 | u16 gpstatus = read_status_reg(info); | |
4749 | u16 testbit; | |
4750 | ||
4751 | /* clear all serial signals except DTR and RTS */ | |
4752 | info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS; | |
4753 | ||
4754 | /* set serial signal bits to reflect MISR */ | |
4755 | ||
4756 | if (!(status & BIT3)) | |
4757 | info->serial_signals |= SerialSignal_CTS; | |
4758 | ||
4759 | if ( !(status & BIT2)) | |
4760 | info->serial_signals |= SerialSignal_DCD; | |
4761 | ||
4762 | testbit = BIT1 << (info->port_num * 2); // Port 0..3 RI is GPDATA<1,3,5,7> | |
4763 | if (!(gpstatus & testbit)) | |
4764 | info->serial_signals |= SerialSignal_RI; | |
4765 | ||
4766 | testbit = BIT0 << (info->port_num * 2); // Port 0..3 DSR is GPDATA<0,2,4,6> | |
4767 | if (!(gpstatus & testbit)) | |
4768 | info->serial_signals |= SerialSignal_DSR; | |
4769 | } | |
4770 | ||
4771 | /* Set the state of DTR and RTS based on contents of | |
4772 | * serial_signals member of device context. | |
4773 | */ | |
ce9f9f73 | 4774 | static void set_signals(SLMP_INFO *info) |
1da177e4 LT |
4775 | { |
4776 | unsigned char RegValue; | |
4777 | u16 EnableBit; | |
4778 | ||
4779 | RegValue = read_reg(info, CTL); | |
4780 | if (info->serial_signals & SerialSignal_RTS) | |
4781 | RegValue &= ~BIT0; | |
4782 | else | |
4783 | RegValue |= BIT0; | |
4784 | write_reg(info, CTL, RegValue); | |
4785 | ||
4786 | // Port 0..3 DTR is ctrl reg <1,3,5,7> | |
4787 | EnableBit = BIT1 << (info->port_num*2); | |
4788 | if (info->serial_signals & SerialSignal_DTR) | |
4789 | info->port_array[0]->ctrlreg_value &= ~EnableBit; | |
4790 | else | |
4791 | info->port_array[0]->ctrlreg_value |= EnableBit; | |
4792 | write_control_reg(info); | |
4793 | } | |
4794 | ||
4795 | /*******************/ | |
4796 | /* DMA Buffer Code */ | |
4797 | /*******************/ | |
4798 | ||
4799 | /* Set the count for all receive buffers to SCABUFSIZE | |
4800 | * and set the current buffer to the first buffer. This effectively | |
4801 | * makes all buffers free and discards any data in buffers. | |
4802 | */ | |
ce9f9f73 | 4803 | static void rx_reset_buffers(SLMP_INFO *info) |
1da177e4 LT |
4804 | { |
4805 | rx_free_frame_buffers(info, 0, info->rx_buf_count - 1); | |
4806 | } | |
4807 | ||
4808 | /* Free the buffers used by a received frame | |
4809 | * | |
4810 | * info pointer to device instance data | |
4811 | * first index of 1st receive buffer of frame | |
4812 | * last index of last receive buffer of frame | |
4813 | */ | |
ce9f9f73 | 4814 | static void rx_free_frame_buffers(SLMP_INFO *info, unsigned int first, unsigned int last) |
1da177e4 | 4815 | { |
0fab6de0 | 4816 | bool done = false; |
1da177e4 LT |
4817 | |
4818 | while(!done) { | |
4819 | /* reset current buffer for reuse */ | |
4820 | info->rx_buf_list[first].status = 0xff; | |
4821 | ||
4822 | if (first == last) { | |
0fab6de0 | 4823 | done = true; |
1da177e4 LT |
4824 | /* set new last rx descriptor address */ |
4825 | write_reg16(info, RXDMA + EDA, info->rx_buf_list_ex[first].phys_entry); | |
4826 | } | |
4827 | ||
4828 | first++; | |
4829 | if (first == info->rx_buf_count) | |
4830 | first = 0; | |
4831 | } | |
4832 | ||
4833 | /* set current buffer to next buffer after last buffer of frame */ | |
4834 | info->current_rx_buf = first; | |
4835 | } | |
4836 | ||
4837 | /* Return a received frame from the receive DMA buffers. | |
4838 | * Only frames received without errors are returned. | |
4839 | * | |
0fab6de0 | 4840 | * Return Value: true if frame returned, otherwise false |
1da177e4 | 4841 | */ |
ce9f9f73 | 4842 | static bool rx_get_frame(SLMP_INFO *info) |
1da177e4 LT |
4843 | { |
4844 | unsigned int StartIndex, EndIndex; /* index of 1st and last buffers of Rx frame */ | |
4845 | unsigned short status; | |
4846 | unsigned int framesize = 0; | |
0fab6de0 | 4847 | bool ReturnCode = false; |
1da177e4 | 4848 | unsigned long flags; |
8fb06c77 | 4849 | struct tty_struct *tty = info->port.tty; |
1da177e4 LT |
4850 | unsigned char addr_field = 0xff; |
4851 | SCADESC *desc; | |
4852 | SCADESC_EX *desc_ex; | |
4853 | ||
4854 | CheckAgain: | |
4855 | /* assume no frame returned, set zero length */ | |
4856 | framesize = 0; | |
4857 | addr_field = 0xff; | |
4858 | ||
4859 | /* | |
4860 | * current_rx_buf points to the 1st buffer of the next available | |
4861 | * receive frame. To find the last buffer of the frame look for | |
4862 | * a non-zero status field in the buffer entries. (The status | |
4863 | * field is set by the 16C32 after completing a receive frame. | |
4864 | */ | |
4865 | StartIndex = EndIndex = info->current_rx_buf; | |
4866 | ||
4867 | for ( ;; ) { | |
4868 | desc = &info->rx_buf_list[EndIndex]; | |
4869 | desc_ex = &info->rx_buf_list_ex[EndIndex]; | |
4870 | ||
4871 | if (desc->status == 0xff) | |
4872 | goto Cleanup; /* current desc still in use, no frames available */ | |
4873 | ||
4874 | if (framesize == 0 && info->params.addr_filter != 0xff) | |
4875 | addr_field = desc_ex->virt_addr[0]; | |
4876 | ||
4877 | framesize += desc->length; | |
4878 | ||
4879 | /* Status != 0 means last buffer of frame */ | |
4880 | if (desc->status) | |
4881 | break; | |
4882 | ||
4883 | EndIndex++; | |
4884 | if (EndIndex == info->rx_buf_count) | |
4885 | EndIndex = 0; | |
4886 | ||
4887 | if (EndIndex == info->current_rx_buf) { | |
4888 | /* all buffers have been 'used' but none mark */ | |
4889 | /* the end of a frame. Reset buffers and receiver. */ | |
4890 | if ( info->rx_enabled ){ | |
4891 | spin_lock_irqsave(&info->lock,flags); | |
4892 | rx_start(info); | |
4893 | spin_unlock_irqrestore(&info->lock,flags); | |
4894 | } | |
4895 | goto Cleanup; | |
4896 | } | |
4897 | ||
4898 | } | |
4899 | ||
4900 | /* check status of receive frame */ | |
4901 | ||
4902 | /* frame status is byte stored after frame data | |
4903 | * | |
4904 | * 7 EOM (end of msg), 1 = last buffer of frame | |
4905 | * 6 Short Frame, 1 = short frame | |
4906 | * 5 Abort, 1 = frame aborted | |
4907 | * 4 Residue, 1 = last byte is partial | |
4908 | * 3 Overrun, 1 = overrun occurred during frame reception | |
4909 | * 2 CRC, 1 = CRC error detected | |
4910 | * | |
4911 | */ | |
4912 | status = desc->status; | |
4913 | ||
4914 | /* ignore CRC bit if not using CRC (bit is undefined) */ | |
4915 | /* Note:CRC is not save to data buffer */ | |
4916 | if (info->params.crc_type == HDLC_CRC_NONE) | |
4917 | status &= ~BIT2; | |
4918 | ||
4919 | if (framesize == 0 || | |
4920 | (addr_field != 0xff && addr_field != info->params.addr_filter)) { | |
4921 | /* discard 0 byte frames, this seems to occur sometime | |
4922 | * when remote is idling flags. | |
4923 | */ | |
4924 | rx_free_frame_buffers(info, StartIndex, EndIndex); | |
4925 | goto CheckAgain; | |
4926 | } | |
4927 | ||
4928 | if (framesize < 2) | |
4929 | status |= BIT6; | |
4930 | ||
4931 | if (status & (BIT6+BIT5+BIT3+BIT2)) { | |
4932 | /* received frame has errors, | |
4933 | * update counts and mark frame size as 0 | |
4934 | */ | |
4935 | if (status & BIT6) | |
4936 | info->icount.rxshort++; | |
4937 | else if (status & BIT5) | |
4938 | info->icount.rxabort++; | |
4939 | else if (status & BIT3) | |
4940 | info->icount.rxover++; | |
4941 | else | |
4942 | info->icount.rxcrc++; | |
4943 | ||
4944 | framesize = 0; | |
af69c7f9 | 4945 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 | 4946 | { |
198191c4 KH |
4947 | info->netdev->stats.rx_errors++; |
4948 | info->netdev->stats.rx_frame_errors++; | |
1da177e4 LT |
4949 | } |
4950 | #endif | |
4951 | } | |
4952 | ||
4953 | if ( debug_level >= DEBUG_LEVEL_BH ) | |
4954 | printk("%s(%d):%s rx_get_frame() status=%04X size=%d\n", | |
4955 | __FILE__,__LINE__,info->device_name,status,framesize); | |
4956 | ||
4957 | if ( debug_level >= DEBUG_LEVEL_DATA ) | |
4958 | trace_block(info,info->rx_buf_list_ex[StartIndex].virt_addr, | |
4959 | min_t(int, framesize,SCABUFSIZE),0); | |
4960 | ||
4961 | if (framesize) { | |
4962 | if (framesize > info->max_frame_size) | |
4963 | info->icount.rxlong++; | |
4964 | else { | |
4965 | /* copy dma buffer(s) to contiguous intermediate buffer */ | |
4966 | int copy_count = framesize; | |
4967 | int index = StartIndex; | |
4968 | unsigned char *ptmp = info->tmp_rx_buf; | |
4969 | info->tmp_rx_buf_count = framesize; | |
4970 | ||
4971 | info->icount.rxok++; | |
4972 | ||
4973 | while(copy_count) { | |
4974 | int partial_count = min(copy_count,SCABUFSIZE); | |
4975 | memcpy( ptmp, | |
4976 | info->rx_buf_list_ex[index].virt_addr, | |
4977 | partial_count ); | |
4978 | ptmp += partial_count; | |
4979 | copy_count -= partial_count; | |
4980 | ||
4981 | if ( ++index == info->rx_buf_count ) | |
4982 | index = 0; | |
4983 | } | |
4984 | ||
af69c7f9 | 4985 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
4986 | if (info->netcount) |
4987 | hdlcdev_rx(info,info->tmp_rx_buf,framesize); | |
4988 | else | |
4989 | #endif | |
4990 | ldisc_receive_buf(tty,info->tmp_rx_buf, | |
4991 | info->flag_buf, framesize); | |
4992 | } | |
4993 | } | |
4994 | /* Free the buffers used by this frame. */ | |
4995 | rx_free_frame_buffers( info, StartIndex, EndIndex ); | |
4996 | ||
0fab6de0 | 4997 | ReturnCode = true; |
1da177e4 LT |
4998 | |
4999 | Cleanup: | |
5000 | if ( info->rx_enabled && info->rx_overflow ) { | |
5001 | /* Receiver is enabled, but needs to restarted due to | |
5002 | * rx buffer overflow. If buffers are empty, restart receiver. | |
5003 | */ | |
5004 | if (info->rx_buf_list[EndIndex].status == 0xff) { | |
5005 | spin_lock_irqsave(&info->lock,flags); | |
5006 | rx_start(info); | |
5007 | spin_unlock_irqrestore(&info->lock,flags); | |
5008 | } | |
5009 | } | |
5010 | ||
5011 | return ReturnCode; | |
5012 | } | |
5013 | ||
5014 | /* load the transmit DMA buffer with data | |
5015 | */ | |
ce9f9f73 | 5016 | static void tx_load_dma_buffer(SLMP_INFO *info, const char *buf, unsigned int count) |
1da177e4 LT |
5017 | { |
5018 | unsigned short copy_count; | |
5019 | unsigned int i = 0; | |
5020 | SCADESC *desc; | |
5021 | SCADESC_EX *desc_ex; | |
5022 | ||
5023 | if ( debug_level >= DEBUG_LEVEL_DATA ) | |
5024 | trace_block(info,buf, min_t(int, count,SCABUFSIZE), 1); | |
5025 | ||
5026 | /* Copy source buffer to one or more DMA buffers, starting with | |
5027 | * the first transmit dma buffer. | |
5028 | */ | |
5029 | for(i=0;;) | |
5030 | { | |
5031 | copy_count = min_t(unsigned short,count,SCABUFSIZE); | |
5032 | ||
5033 | desc = &info->tx_buf_list[i]; | |
5034 | desc_ex = &info->tx_buf_list_ex[i]; | |
5035 | ||
5036 | load_pci_memory(info, desc_ex->virt_addr,buf,copy_count); | |
5037 | ||
5038 | desc->length = copy_count; | |
5039 | desc->status = 0; | |
5040 | ||
5041 | buf += copy_count; | |
5042 | count -= copy_count; | |
5043 | ||
5044 | if (!count) | |
5045 | break; | |
5046 | ||
5047 | i++; | |
5048 | if (i >= info->tx_buf_count) | |
5049 | i = 0; | |
5050 | } | |
5051 | ||
5052 | info->tx_buf_list[i].status = 0x81; /* set EOM and EOT status */ | |
5053 | info->last_tx_buf = ++i; | |
5054 | } | |
5055 | ||
ce9f9f73 | 5056 | static bool register_test(SLMP_INFO *info) |
1da177e4 LT |
5057 | { |
5058 | static unsigned char testval[] = {0x00, 0xff, 0xaa, 0x55, 0x69, 0x96}; | |
fe971071 | 5059 | static unsigned int count = ARRAY_SIZE(testval); |
1da177e4 | 5060 | unsigned int i; |
0fab6de0 | 5061 | bool rc = true; |
1da177e4 LT |
5062 | unsigned long flags; |
5063 | ||
5064 | spin_lock_irqsave(&info->lock,flags); | |
5065 | reset_port(info); | |
5066 | ||
5067 | /* assume failure */ | |
5068 | info->init_error = DiagStatus_AddressFailure; | |
5069 | ||
5070 | /* Write bit patterns to various registers but do it out of */ | |
5071 | /* sync, then read back and verify values. */ | |
5072 | ||
5073 | for (i = 0 ; i < count ; i++) { | |
5074 | write_reg(info, TMC, testval[i]); | |
5075 | write_reg(info, IDL, testval[(i+1)%count]); | |
5076 | write_reg(info, SA0, testval[(i+2)%count]); | |
5077 | write_reg(info, SA1, testval[(i+3)%count]); | |
5078 | ||
5079 | if ( (read_reg(info, TMC) != testval[i]) || | |
5080 | (read_reg(info, IDL) != testval[(i+1)%count]) || | |
5081 | (read_reg(info, SA0) != testval[(i+2)%count]) || | |
5082 | (read_reg(info, SA1) != testval[(i+3)%count]) ) | |
5083 | { | |
0fab6de0 | 5084 | rc = false; |
1da177e4 LT |
5085 | break; |
5086 | } | |
5087 | } | |
5088 | ||
5089 | reset_port(info); | |
5090 | spin_unlock_irqrestore(&info->lock,flags); | |
5091 | ||
5092 | return rc; | |
5093 | } | |
5094 | ||
ce9f9f73 | 5095 | static bool irq_test(SLMP_INFO *info) |
1da177e4 LT |
5096 | { |
5097 | unsigned long timeout; | |
5098 | unsigned long flags; | |
5099 | ||
5100 | unsigned char timer = (info->port_num & 1) ? TIMER2 : TIMER0; | |
5101 | ||
5102 | spin_lock_irqsave(&info->lock,flags); | |
5103 | reset_port(info); | |
5104 | ||
5105 | /* assume failure */ | |
5106 | info->init_error = DiagStatus_IrqFailure; | |
0fab6de0 | 5107 | info->irq_occurred = false; |
1da177e4 LT |
5108 | |
5109 | /* setup timer0 on SCA0 to interrupt */ | |
5110 | ||
5111 | /* IER2<7..4> = timer<3..0> interrupt enables (1=enabled) */ | |
5112 | write_reg(info, IER2, (unsigned char)((info->port_num & 1) ? BIT6 : BIT4)); | |
5113 | ||
5114 | write_reg(info, (unsigned char)(timer + TEPR), 0); /* timer expand prescale */ | |
5115 | write_reg16(info, (unsigned char)(timer + TCONR), 1); /* timer constant */ | |
5116 | ||
5117 | ||
5118 | /* TMCS, Timer Control/Status Register | |
5119 | * | |
5120 | * 07 CMF, Compare match flag (read only) 1=match | |
5121 | * 06 ECMI, CMF Interrupt Enable: 1=enabled | |
5122 | * 05 Reserved, must be 0 | |
5123 | * 04 TME, Timer Enable | |
5124 | * 03..00 Reserved, must be 0 | |
5125 | * | |
5126 | * 0101 0000 | |
5127 | */ | |
5128 | write_reg(info, (unsigned char)(timer + TMCS), 0x50); | |
5129 | ||
5130 | spin_unlock_irqrestore(&info->lock,flags); | |
5131 | ||
5132 | timeout=100; | |
5133 | while( timeout-- && !info->irq_occurred ) { | |
5134 | msleep_interruptible(10); | |
5135 | } | |
5136 | ||
5137 | spin_lock_irqsave(&info->lock,flags); | |
5138 | reset_port(info); | |
5139 | spin_unlock_irqrestore(&info->lock,flags); | |
5140 | ||
5141 | return info->irq_occurred; | |
5142 | } | |
5143 | ||
5144 | /* initialize individual SCA device (2 ports) | |
5145 | */ | |
0fab6de0 | 5146 | static bool sca_init(SLMP_INFO *info) |
1da177e4 LT |
5147 | { |
5148 | /* set wait controller to single mem partition (low), no wait states */ | |
5149 | write_reg(info, PABR0, 0); /* wait controller addr boundary 0 */ | |
5150 | write_reg(info, PABR1, 0); /* wait controller addr boundary 1 */ | |
5151 | write_reg(info, WCRL, 0); /* wait controller low range */ | |
5152 | write_reg(info, WCRM, 0); /* wait controller mid range */ | |
5153 | write_reg(info, WCRH, 0); /* wait controller high range */ | |
5154 | ||
5155 | /* DPCR, DMA Priority Control | |
5156 | * | |
5157 | * 07..05 Not used, must be 0 | |
5158 | * 04 BRC, bus release condition: 0=all transfers complete | |
5159 | * 03 CCC, channel change condition: 0=every cycle | |
5160 | * 02..00 PR<2..0>, priority 100=round robin | |
5161 | * | |
5162 | * 00000100 = 0x04 | |
5163 | */ | |
5164 | write_reg(info, DPCR, dma_priority); | |
5165 | ||
5166 | /* DMA Master Enable, BIT7: 1=enable all channels */ | |
5167 | write_reg(info, DMER, 0x80); | |
5168 | ||
5169 | /* enable all interrupt classes */ | |
5170 | write_reg(info, IER0, 0xff); /* TxRDY,RxRDY,TxINT,RxINT (ports 0-1) */ | |
5171 | write_reg(info, IER1, 0xff); /* DMIB,DMIA (channels 0-3) */ | |
5172 | write_reg(info, IER2, 0xf0); /* TIRQ (timers 0-3) */ | |
5173 | ||
5174 | /* ITCR, interrupt control register | |
5175 | * 07 IPC, interrupt priority, 0=MSCI->DMA | |
5176 | * 06..05 IAK<1..0>, Acknowledge cycle, 00=non-ack cycle | |
5177 | * 04 VOS, Vector Output, 0=unmodified vector | |
5178 | * 03..00 Reserved, must be 0 | |
5179 | */ | |
5180 | write_reg(info, ITCR, 0); | |
5181 | ||
0fab6de0 | 5182 | return true; |
1da177e4 LT |
5183 | } |
5184 | ||
5185 | /* initialize adapter hardware | |
5186 | */ | |
ce9f9f73 | 5187 | static bool init_adapter(SLMP_INFO *info) |
1da177e4 LT |
5188 | { |
5189 | int i; | |
5190 | ||
5191 | /* Set BIT30 of Local Control Reg 0x50 to reset SCA */ | |
5192 | volatile u32 *MiscCtrl = (u32 *)(info->lcr_base + 0x50); | |
5193 | u32 readval; | |
5194 | ||
5195 | info->misc_ctrl_value |= BIT30; | |
5196 | *MiscCtrl = info->misc_ctrl_value; | |
5197 | ||
5198 | /* | |
5199 | * Force at least 170ns delay before clearing | |
5200 | * reset bit. Each read from LCR takes at least | |
5201 | * 30ns so 10 times for 300ns to be safe. | |
5202 | */ | |
5203 | for(i=0;i<10;i++) | |
5204 | readval = *MiscCtrl; | |
5205 | ||
5206 | info->misc_ctrl_value &= ~BIT30; | |
5207 | *MiscCtrl = info->misc_ctrl_value; | |
5208 | ||
5209 | /* init control reg (all DTRs off, all clksel=input) */ | |
5210 | info->ctrlreg_value = 0xaa; | |
5211 | write_control_reg(info); | |
5212 | ||
5213 | { | |
5214 | volatile u32 *LCR1BRDR = (u32 *)(info->lcr_base + 0x2c); | |
5215 | lcr1_brdr_value &= ~(BIT5 + BIT4 + BIT3); | |
5216 | ||
5217 | switch(read_ahead_count) | |
5218 | { | |
5219 | case 16: | |
5220 | lcr1_brdr_value |= BIT5 + BIT4 + BIT3; | |
5221 | break; | |
5222 | case 8: | |
5223 | lcr1_brdr_value |= BIT5 + BIT4; | |
5224 | break; | |
5225 | case 4: | |
5226 | lcr1_brdr_value |= BIT5 + BIT3; | |
5227 | break; | |
5228 | case 0: | |
5229 | lcr1_brdr_value |= BIT5; | |
5230 | break; | |
5231 | } | |
5232 | ||
5233 | *LCR1BRDR = lcr1_brdr_value; | |
5234 | *MiscCtrl = misc_ctrl_value; | |
5235 | } | |
5236 | ||
5237 | sca_init(info->port_array[0]); | |
5238 | sca_init(info->port_array[2]); | |
5239 | ||
0fab6de0 | 5240 | return true; |
1da177e4 LT |
5241 | } |
5242 | ||
5243 | /* Loopback an HDLC frame to test the hardware | |
5244 | * interrupt and DMA functions. | |
5245 | */ | |
ce9f9f73 | 5246 | static bool loopback_test(SLMP_INFO *info) |
1da177e4 LT |
5247 | { |
5248 | #define TESTFRAMESIZE 20 | |
5249 | ||
5250 | unsigned long timeout; | |
5251 | u16 count = TESTFRAMESIZE; | |
5252 | unsigned char buf[TESTFRAMESIZE]; | |
0fab6de0 | 5253 | bool rc = false; |
1da177e4 LT |
5254 | unsigned long flags; |
5255 | ||
8fb06c77 | 5256 | struct tty_struct *oldtty = info->port.tty; |
1da177e4 LT |
5257 | u32 speed = info->params.clock_speed; |
5258 | ||
5259 | info->params.clock_speed = 3686400; | |
8fb06c77 | 5260 | info->port.tty = NULL; |
1da177e4 LT |
5261 | |
5262 | /* assume failure */ | |
5263 | info->init_error = DiagStatus_DmaFailure; | |
5264 | ||
5265 | /* build and send transmit frame */ | |
5266 | for (count = 0; count < TESTFRAMESIZE;++count) | |
5267 | buf[count] = (unsigned char)count; | |
5268 | ||
5269 | memset(info->tmp_rx_buf,0,TESTFRAMESIZE); | |
5270 | ||
5271 | /* program hardware for HDLC and enabled receiver */ | |
5272 | spin_lock_irqsave(&info->lock,flags); | |
5273 | hdlc_mode(info); | |
5274 | enable_loopback(info,1); | |
5275 | rx_start(info); | |
5276 | info->tx_count = count; | |
5277 | tx_load_dma_buffer(info,buf,count); | |
5278 | tx_start(info); | |
5279 | spin_unlock_irqrestore(&info->lock,flags); | |
5280 | ||
5281 | /* wait for receive complete */ | |
5282 | /* Set a timeout for waiting for interrupt. */ | |
5283 | for ( timeout = 100; timeout; --timeout ) { | |
5284 | msleep_interruptible(10); | |
5285 | ||
5286 | if (rx_get_frame(info)) { | |
0fab6de0 | 5287 | rc = true; |
1da177e4 LT |
5288 | break; |
5289 | } | |
5290 | } | |
5291 | ||
5292 | /* verify received frame length and contents */ | |
0fab6de0 JP |
5293 | if (rc && |
5294 | ( info->tmp_rx_buf_count != count || | |
5295 | memcmp(buf, info->tmp_rx_buf,count))) { | |
5296 | rc = false; | |
1da177e4 LT |
5297 | } |
5298 | ||
5299 | spin_lock_irqsave(&info->lock,flags); | |
5300 | reset_adapter(info); | |
5301 | spin_unlock_irqrestore(&info->lock,flags); | |
5302 | ||
5303 | info->params.clock_speed = speed; | |
8fb06c77 | 5304 | info->port.tty = oldtty; |
1da177e4 LT |
5305 | |
5306 | return rc; | |
5307 | } | |
5308 | ||
5309 | /* Perform diagnostics on hardware | |
5310 | */ | |
ce9f9f73 | 5311 | static int adapter_test( SLMP_INFO *info ) |
1da177e4 LT |
5312 | { |
5313 | unsigned long flags; | |
5314 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
5315 | printk( "%s(%d):Testing device %s\n", | |
5316 | __FILE__,__LINE__,info->device_name ); | |
5317 | ||
5318 | spin_lock_irqsave(&info->lock,flags); | |
5319 | init_adapter(info); | |
5320 | spin_unlock_irqrestore(&info->lock,flags); | |
5321 | ||
5322 | info->port_array[0]->port_count = 0; | |
5323 | ||
5324 | if ( register_test(info->port_array[0]) && | |
5325 | register_test(info->port_array[1])) { | |
5326 | ||
5327 | info->port_array[0]->port_count = 2; | |
5328 | ||
5329 | if ( register_test(info->port_array[2]) && | |
5330 | register_test(info->port_array[3]) ) | |
5331 | info->port_array[0]->port_count += 2; | |
5332 | } | |
5333 | else { | |
5334 | printk( "%s(%d):Register test failure for device %s Addr=%08lX\n", | |
5335 | __FILE__,__LINE__,info->device_name, (unsigned long)(info->phys_sca_base)); | |
5336 | return -ENODEV; | |
5337 | } | |
5338 | ||
5339 | if ( !irq_test(info->port_array[0]) || | |
5340 | !irq_test(info->port_array[1]) || | |
5341 | (info->port_count == 4 && !irq_test(info->port_array[2])) || | |
5342 | (info->port_count == 4 && !irq_test(info->port_array[3]))) { | |
5343 | printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n", | |
5344 | __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) ); | |
5345 | return -ENODEV; | |
5346 | } | |
5347 | ||
5348 | if (!loopback_test(info->port_array[0]) || | |
5349 | !loopback_test(info->port_array[1]) || | |
5350 | (info->port_count == 4 && !loopback_test(info->port_array[2])) || | |
5351 | (info->port_count == 4 && !loopback_test(info->port_array[3]))) { | |
5352 | printk( "%s(%d):DMA test failure for device %s\n", | |
5353 | __FILE__,__LINE__,info->device_name); | |
5354 | return -ENODEV; | |
5355 | } | |
5356 | ||
5357 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
5358 | printk( "%s(%d):device %s passed diagnostics\n", | |
5359 | __FILE__,__LINE__,info->device_name ); | |
5360 | ||
5361 | info->port_array[0]->init_error = 0; | |
5362 | info->port_array[1]->init_error = 0; | |
5363 | if ( info->port_count > 2 ) { | |
5364 | info->port_array[2]->init_error = 0; | |
5365 | info->port_array[3]->init_error = 0; | |
5366 | } | |
5367 | ||
5368 | return 0; | |
5369 | } | |
5370 | ||
5371 | /* Test the shared memory on a PCI adapter. | |
5372 | */ | |
ce9f9f73 | 5373 | static bool memory_test(SLMP_INFO *info) |
1da177e4 LT |
5374 | { |
5375 | static unsigned long testval[] = { 0x0, 0x55555555, 0xaaaaaaaa, | |
5376 | 0x66666666, 0x99999999, 0xffffffff, 0x12345678 }; | |
fe971071 | 5377 | unsigned long count = ARRAY_SIZE(testval); |
1da177e4 LT |
5378 | unsigned long i; |
5379 | unsigned long limit = SCA_MEM_SIZE/sizeof(unsigned long); | |
5380 | unsigned long * addr = (unsigned long *)info->memory_base; | |
5381 | ||
5382 | /* Test data lines with test pattern at one location. */ | |
5383 | ||
5384 | for ( i = 0 ; i < count ; i++ ) { | |
5385 | *addr = testval[i]; | |
5386 | if ( *addr != testval[i] ) | |
0fab6de0 | 5387 | return false; |
1da177e4 LT |
5388 | } |
5389 | ||
5390 | /* Test address lines with incrementing pattern over */ | |
5391 | /* entire address range. */ | |
5392 | ||
5393 | for ( i = 0 ; i < limit ; i++ ) { | |
5394 | *addr = i * 4; | |
5395 | addr++; | |
5396 | } | |
5397 | ||
5398 | addr = (unsigned long *)info->memory_base; | |
5399 | ||
5400 | for ( i = 0 ; i < limit ; i++ ) { | |
5401 | if ( *addr != i * 4 ) | |
0fab6de0 | 5402 | return false; |
1da177e4 LT |
5403 | addr++; |
5404 | } | |
5405 | ||
5406 | memset( info->memory_base, 0, SCA_MEM_SIZE ); | |
0fab6de0 | 5407 | return true; |
1da177e4 LT |
5408 | } |
5409 | ||
5410 | /* Load data into PCI adapter shared memory. | |
5411 | * | |
5412 | * The PCI9050 releases control of the local bus | |
5413 | * after completing the current read or write operation. | |
5414 | * | |
5415 | * While the PCI9050 write FIFO not empty, the | |
5416 | * PCI9050 treats all of the writes as a single transaction | |
5417 | * and does not release the bus. This causes DMA latency problems | |
5418 | * at high speeds when copying large data blocks to the shared memory. | |
5419 | * | |
5420 | * This function breaks a write into multiple transations by | |
5421 | * interleaving a read which flushes the write FIFO and 'completes' | |
5422 | * the write transation. This allows any pending DMA request to gain control | |
5423 | * of the local bus in a timely fasion. | |
5424 | */ | |
ce9f9f73 | 5425 | static void load_pci_memory(SLMP_INFO *info, char* dest, const char* src, unsigned short count) |
1da177e4 LT |
5426 | { |
5427 | /* A load interval of 16 allows for 4 32-bit writes at */ | |
5428 | /* 136ns each for a maximum latency of 542ns on the local bus.*/ | |
5429 | ||
5430 | unsigned short interval = count / sca_pci_load_interval; | |
5431 | unsigned short i; | |
5432 | ||
5433 | for ( i = 0 ; i < interval ; i++ ) | |
5434 | { | |
5435 | memcpy(dest, src, sca_pci_load_interval); | |
5436 | read_status_reg(info); | |
5437 | dest += sca_pci_load_interval; | |
5438 | src += sca_pci_load_interval; | |
5439 | } | |
5440 | ||
5441 | memcpy(dest, src, count % sca_pci_load_interval); | |
5442 | } | |
5443 | ||
ce9f9f73 | 5444 | static void trace_block(SLMP_INFO *info,const char* data, int count, int xmit) |
1da177e4 LT |
5445 | { |
5446 | int i; | |
5447 | int linecount; | |
5448 | if (xmit) | |
5449 | printk("%s tx data:\n",info->device_name); | |
5450 | else | |
5451 | printk("%s rx data:\n",info->device_name); | |
5452 | ||
5453 | while(count) { | |
5454 | if (count > 16) | |
5455 | linecount = 16; | |
5456 | else | |
5457 | linecount = count; | |
5458 | ||
5459 | for(i=0;i<linecount;i++) | |
5460 | printk("%02X ",(unsigned char)data[i]); | |
5461 | for(;i<17;i++) | |
5462 | printk(" "); | |
5463 | for(i=0;i<linecount;i++) { | |
5464 | if (data[i]>=040 && data[i]<=0176) | |
5465 | printk("%c",data[i]); | |
5466 | else | |
5467 | printk("."); | |
5468 | } | |
5469 | printk("\n"); | |
5470 | ||
5471 | data += linecount; | |
5472 | count -= linecount; | |
5473 | } | |
5474 | } /* end of trace_block() */ | |
5475 | ||
5476 | /* called when HDLC frame times out | |
5477 | * update stats and do tx completion processing | |
5478 | */ | |
ce9f9f73 | 5479 | static void tx_timeout(unsigned long context) |
1da177e4 LT |
5480 | { |
5481 | SLMP_INFO *info = (SLMP_INFO*)context; | |
5482 | unsigned long flags; | |
5483 | ||
5484 | if ( debug_level >= DEBUG_LEVEL_INFO ) | |
5485 | printk( "%s(%d):%s tx_timeout()\n", | |
5486 | __FILE__,__LINE__,info->device_name); | |
5487 | if(info->tx_active && info->params.mode == MGSL_MODE_HDLC) { | |
5488 | info->icount.txtimeout++; | |
5489 | } | |
5490 | spin_lock_irqsave(&info->lock,flags); | |
0fab6de0 | 5491 | info->tx_active = false; |
1da177e4 LT |
5492 | info->tx_count = info->tx_put = info->tx_get = 0; |
5493 | ||
5494 | spin_unlock_irqrestore(&info->lock,flags); | |
5495 | ||
af69c7f9 | 5496 | #if SYNCLINK_GENERIC_HDLC |
1da177e4 LT |
5497 | if (info->netcount) |
5498 | hdlcdev_tx_done(info); | |
5499 | else | |
5500 | #endif | |
5501 | bh_transmit(info); | |
5502 | } | |
5503 | ||
5504 | /* called to periodically check the DSR/RI modem signal input status | |
5505 | */ | |
ce9f9f73 | 5506 | static void status_timeout(unsigned long context) |
1da177e4 LT |
5507 | { |
5508 | u16 status = 0; | |
5509 | SLMP_INFO *info = (SLMP_INFO*)context; | |
5510 | unsigned long flags; | |
5511 | unsigned char delta; | |
5512 | ||
5513 | ||
5514 | spin_lock_irqsave(&info->lock,flags); | |
5515 | get_signals(info); | |
5516 | spin_unlock_irqrestore(&info->lock,flags); | |
5517 | ||
5518 | /* check for DSR/RI state change */ | |
5519 | ||
5520 | delta = info->old_signals ^ info->serial_signals; | |
5521 | info->old_signals = info->serial_signals; | |
5522 | ||
5523 | if (delta & SerialSignal_DSR) | |
5524 | status |= MISCSTATUS_DSR_LATCHED|(info->serial_signals&SerialSignal_DSR); | |
5525 | ||
5526 | if (delta & SerialSignal_RI) | |
5527 | status |= MISCSTATUS_RI_LATCHED|(info->serial_signals&SerialSignal_RI); | |
5528 | ||
5529 | if (delta & SerialSignal_DCD) | |
5530 | status |= MISCSTATUS_DCD_LATCHED|(info->serial_signals&SerialSignal_DCD); | |
5531 | ||
5532 | if (delta & SerialSignal_CTS) | |
5533 | status |= MISCSTATUS_CTS_LATCHED|(info->serial_signals&SerialSignal_CTS); | |
5534 | ||
5535 | if (status) | |
5536 | isr_io_pin(info,status); | |
5537 | ||
40565f19 | 5538 | mod_timer(&info->status_timer, jiffies + msecs_to_jiffies(10)); |
1da177e4 LT |
5539 | } |
5540 | ||
5541 | ||
5542 | /* Register Access Routines - | |
5543 | * All registers are memory mapped | |
5544 | */ | |
5545 | #define CALC_REGADDR() \ | |
5546 | unsigned char * RegAddr = (unsigned char*)(info->sca_base + Addr); \ | |
5547 | if (info->port_num > 1) \ | |
5548 | RegAddr += 256; /* port 0-1 SCA0, 2-3 SCA1 */ \ | |
5549 | if ( info->port_num & 1) { \ | |
5550 | if (Addr > 0x7f) \ | |
5551 | RegAddr += 0x40; /* DMA access */ \ | |
5552 | else if (Addr > 0x1f && Addr < 0x60) \ | |
5553 | RegAddr += 0x20; /* MSCI access */ \ | |
5554 | } | |
5555 | ||
5556 | ||
ce9f9f73 | 5557 | static unsigned char read_reg(SLMP_INFO * info, unsigned char Addr) |
1da177e4 LT |
5558 | { |
5559 | CALC_REGADDR(); | |
5560 | return *RegAddr; | |
5561 | } | |
ce9f9f73 | 5562 | static void write_reg(SLMP_INFO * info, unsigned char Addr, unsigned char Value) |
1da177e4 LT |
5563 | { |
5564 | CALC_REGADDR(); | |
5565 | *RegAddr = Value; | |
5566 | } | |
5567 | ||
ce9f9f73 | 5568 | static u16 read_reg16(SLMP_INFO * info, unsigned char Addr) |
1da177e4 LT |
5569 | { |
5570 | CALC_REGADDR(); | |
5571 | return *((u16 *)RegAddr); | |
5572 | } | |
5573 | ||
ce9f9f73 | 5574 | static void write_reg16(SLMP_INFO * info, unsigned char Addr, u16 Value) |
1da177e4 LT |
5575 | { |
5576 | CALC_REGADDR(); | |
5577 | *((u16 *)RegAddr) = Value; | |
5578 | } | |
5579 | ||
ce9f9f73 | 5580 | static unsigned char read_status_reg(SLMP_INFO * info) |
1da177e4 LT |
5581 | { |
5582 | unsigned char *RegAddr = (unsigned char *)info->statctrl_base; | |
5583 | return *RegAddr; | |
5584 | } | |
5585 | ||
ce9f9f73 | 5586 | static void write_control_reg(SLMP_INFO * info) |
1da177e4 LT |
5587 | { |
5588 | unsigned char *RegAddr = (unsigned char *)info->statctrl_base; | |
5589 | *RegAddr = info->port_array[0]->ctrlreg_value; | |
5590 | } | |
5591 | ||
5592 | ||
5593 | static int __devinit synclinkmp_init_one (struct pci_dev *dev, | |
5594 | const struct pci_device_id *ent) | |
5595 | { | |
5596 | if (pci_enable_device(dev)) { | |
5597 | printk("error enabling pci device %p\n", dev); | |
5598 | return -EIO; | |
5599 | } | |
5600 | device_init( ++synclinkmp_adapter_count, dev ); | |
5601 | return 0; | |
5602 | } | |
5603 | ||
5604 | static void __devexit synclinkmp_remove_one (struct pci_dev *dev) | |
5605 | { | |
5606 | } |