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Char: cyclades, init card struct immediately
[net-next-2.6.git] / drivers / char / cyclades.c
CommitLineData
1da177e4
LT		 1#undef BLOCKMOVE
2#define Z_WAKE
3#undef Z_EXT_CHARS_IN_BUFFER
1da177e4
LT		 4
5/*
6 * linux/drivers/char/cyclades.c
7 *
8 * This file contains the driver for the Cyclades async multiport
9 * serial boards.
10 *
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
13 * Currently maintained by Cyclades team <async@cyclades.com>.
14 *
15 * For Technical support and installation problems, please send e-mail
16 * to support@cyclades.com.
17 *
18 * Much of the design and some of the code came from serial.c
19 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
20 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
21 * and then fixed as suggested by Michael K. Johnson 12/12/92.
22 *
23 * This version supports shared IRQ's (only for PCI boards).
24 *
25 * $Log: cyclades.c,v $
26 * Prevent users from opening non-existing Z ports.
27 *
28 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
29 * Fixed the PCI detection function to work properly on Alpha systems.
30 * Implemented support for TIOCSERGETLSR ioctl.
31 * Implemented full support for non-standard baud rates.
32 *
33 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
34 * Request PLX I/O region, although driver doesn't use it, to avoid
35 * problems with other drivers accessing it.
36 * Removed count for on-board buffer characters in cy_chars_in_buffer
37 * (Cyclades-Z only).
38 *
39 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
40 * Driver now reports physical instead of virtual memory addresses.
41 * Masks were added to some Cyclades-Z read accesses.
42 * Implemented workaround for PLX9050 bug that would cause a system lockup
43 * in certain systems, depending on the MMIO addresses allocated to the
44 * board.
45 * Changed the Tx interrupt programming in the CD1400 chips to boost up
46 * performance (Cyclom-Y only).
47 * Code is now compliant with the new module interface (module_[init|exit]).
48 * Make use of the PCI helper functions to access PCI resources.
49 * Did some code "housekeeping".
50 *
51 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
52 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
53 *
54 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
55 * Fixed SMP locking in Cyclom-Y interrupt handler.
56 *
57 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
58 * Added a new cyclades_card field called nports to allow the driver to
59 * know the exact number of ports found by the Z firmware after its load;
60 * RX buffer contention prevention logic on interrupt op mode revisited
61 * (Cyclades-Z only);
62 * Revisited printk's for Z debug;
63 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
64 *
65 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
66 * Fixed bug in cyz_poll that would make all ports but port 0
67 * unable to transmit/receive data (Cyclades-Z only);
68 * Implemented logic to prevent the RX buffer from being stuck with data
69 * due to a driver / firmware race condition in interrupt op mode
70 * (Cyclades-Z only);
71 * Fixed bug in block_til_ready logic that would lead to a system crash;
72 * Revisited cy_close spinlock usage;
73 *
74 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
75 * Revisited CONFIG_PCI conditional compilation for PCI board support;
76 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
77 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
78 * Removed CTS handling from the driver -- this is now completely handled
79 * by the firmware (Cyclades-Z only);
80 * Flush RX on-board buffers on a port open (Cyclades-Z only);
81 * Fixed handling of ASYNC_SPD_* TTY flags;
82 * Module unload now unmaps all memory area allocated by ioremap;
83 *
84 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
85 * Removed CY_PROC conditional compilation;
86 * Implemented SMP-awareness for the driver;
87 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
88 * functions;
89 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
90 * (irq=NN) as parameters (only for ISA boards);
91 * Fixed bug in set_line_char that would prevent the Cyclades-Z
92 * ports from being configured at speeds above 115.2Kbps;
93 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
94 * switching from working properly;
95 * The driver now only prints IRQ info for the Cyclades-Z if it's
96 * configured to work in interrupt mode;
97 *
98 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
99 * Added support for interrupt mode operation for the Z cards;
100 * Removed the driver inactivity control for the Z;
101 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
102 * the Z firmware is not loaded yet;
103 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
104 * same functionality;
105 * Implemented workaround for IRQ setting loss on the PCI configuration
106 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
107 *
108 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
109 * /proc entry location changed to /proc/tty/driver/cyclades;
110 * Added support to shared IRQ's (only for PCI boards);
111 * Added support for Cobalt Qube2 systems;
112 * IRQ [de]allocation scheme revisited;
113 * BREAK implementation changed in order to make use of the 'break_ctl'
114 * TTY facility;
115 * Fixed typo in TTY structure field 'driver_name';
116 * Included a PCI bridge reset and EEPROM reload in the board
117 * initialization code (for both Y and Z series).
118 *
119 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
120 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
121 * closed properly after a SIGINT;
122 * Module usage counter scheme revisited;
123 * Added support to the upcoming Y PCI boards (i.e., support to additional
124 * PCI Device ID's).
125 *
126 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
127 * Removed all unnecessary page-alignement operations in ioremap calls
128 * (ioremap is currently safe for these operations).
129 *
130 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
131 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
132 * order to make PLX9050-based boards work with certain motherboards.
133 *
134 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
135 * cy_close function now resets (correctly) the tty->closing flag;
136 * JIFFIES_DIFF macro fixed.
137 *
138 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
139 * Fixed bug in cy_close function, which was not informing HW of
140 * which port should have the reception disabled before doing so;
141 * fixed Cyclom-8YoP hardware detection bug.
142 *
143 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
144 * Fixed bug in cy_close function, which causes malfunction
145 * of one of the first 4 ports when a higher port is closed
146 * (Cyclom-Y only).
147 *
148 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
149 * Fixed Cyclom-4Yo hardware detection bug.
150 *
151 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
152 * /proc/cyclades implementation with great collaboration of
153 * Marc Lewis <marc@blarg.net>;
154 * cyy_interrupt was changed to avoid occurrence of kernel oopses
155 * during PPP operation.
156 *
157 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
158 * General code review in order to comply with 2.1 kernel standards;
159 * data loss prevention for slow devices revisited (cy_wait_until_sent
160 * was created);
161 * removed conditional compilation for new/old PCI structure support
162 * (now the driver only supports the new PCI structure).
163 *
164 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
165 * added conditional compilation for new/old PCI structure support;
166 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
167 *
168 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
169 * cleaned up the data loss fix;
170 * fixed XON/XOFF handling once more (Cyclades-Z);
171 * general review of the driver routines;
172 * introduction of a mechanism to prevent data loss with slow
173 * printers, by forcing a delay before closing the port.
174 *
175 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
176 * fixed detection/handling of new CD1400 in Ye boards;
177 * fixed XON/XOFF handling (Cyclades-Z);
178 * fixed data loss caused by a premature port close;
179 * introduction of a flag that holds the CD1400 version ID per port
180 * (used by the CYGETCD1400VER new ioctl).
181 *
182 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
183 * Code review for the module cleanup routine;
184 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
185 * includes anonymous changes regarding signal_pending.
186 *
187 * Revision 2.1 1997/11/01 17:42:41 ivan
188 * Changes in the driver to support Alpha systems (except 8Zo V_1);
189 * BREAK fix for the Cyclades-Z boards;
190 * driver inactivity control by FW implemented;
191 * introduction of flag that allows driver to take advantage of
192 * a special CD1400 feature related to HW flow control;
193 * added support for the CD1400 rev. J (Cyclom-Y boards);
194 * introduction of ioctls to:
195 * - control the rtsdtr_inv flag (Cyclom-Y);
196 * - control the rflow flag (Cyclom-Y);
197 * - adjust the polling interval (Cyclades-Z);
198 *
199 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
200 * Fixes related to kernel version conditional
201 * compilation.
202 *
203 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
204 * Compatibility issues between kernels 2.0.x and
205 * 2.1.x (mainly related to clear_bit function).
206 *
207 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
208 * Changes to define the memory window according to the
209 * board type.
210 *
211 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
212 * Changes to support new cycladesZ boards.
213 *
214 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
215 * Merge of Bentson's and Daniel's version 1.36.4.28.
216 * Corrects bug in cy_detect_pci: check if there are more
217 * ports than the number of static structs allocated.
218 * Warning message during initialization if this driver is
219 * used with the new generation of cycladesZ boards. Those
220 * will be supported only in next release of the driver.
221 * Corrects bug in cy_detect_pci and cy_detect_isa that
222 * returned wrong number of VALID boards, when a cyclomY
223 * was found with no serial modules connected.
224 * Changes to use current (2.1.x) kernel subroutine names
225 * and created macros for compilation with 2.0.x kernel,
226 * instead of the other way around.
227 *
228 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
229 * Change queue_task_irq_off to queue_task_irq.
230 * The inline function queue_task_irq_off (tqueue.h)
231 * was removed from latest releases of 2.1.x kernel.
232 * Use of macro __init to mark the initialization
233 * routines, so memory can be reused.
234 * Also incorporate implementation of critical region
235 * in function cleanup_module() created by anonymous
236 * linuxer.
237 *
238 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
239 * Change to support new firmware that solves DCD problem:
240 * application could fail to receive SIGHUP signal when DCD
241 * varying too fast.
242 *
243 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
244 * Changed for support linux versions 2.1.X.
245 * Backward compatible with linux versions 2.0.X.
246 * Corrected illegal use of filler field in
247 * CH_CTRL struct.
248 * Deleted some debug messages.
249 *
250 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
251 * Included check for NULL tty pointer in cyz_poll.
252 *
253 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
254 * Bill Foster at Blarg! Online services noticed that
255 * some of the switch elements of -Z modem control
256 * lacked a closing "break;"
257 *
258 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
259 * Changed low water threshold for buffer xmit_buf
260 *
261 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
262 * Marcio provided fix to modem status fetch for -Z
263 *
264 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
265 * improve mapping of -Z control page (thanks to Steve
266 * Price <stevep@fa.tdktca.com> for help on this)
267 *
268 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
269 * shift from CPU-bound to memcopy in cyz_polling operation
270 *
271 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
272 * Added support to set and report higher speeds.
273 *
274 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
275 * Some fixes in the HW flow control for the BETA release.
276 * Don't try to register the IRQ.
277 *
278 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
279 * make sure "cyc" appears in all kernel messages; all soft interrupts
280 * handled by same routine; recognize out-of-band reception; comment
281 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
33430dc5 282 * fix race condition in -Z buffer management; only -Y needs to explicitly
1da177e4
LT		 283 * flush chars; tidy up some startup messages;
284 *
285 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
286 * shift MOD_INC_USE_COUNT location to match
287 * serial.c; purge some diagnostic messages;
288 *
289 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
290 * enable modem status messages and fetch & process them; note
291 * time of last activity type for each port; set_line_char now
292 * supports more than line 0 and treats 0 baud correctly;
293 * get_modem_info senses rs_status;
294 *
295 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
296 * barely works--now's time to turn on
297 * more features 'til it breaks
298 *
299 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
300 * check more -Z board status; shorten boot message
301 *
302 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
303 * fix reference to ch_ctrl in startup; verify return
304 * values from cyz_issue_cmd and cyz_update_channel;
305 * more stuff to get modem control correct;
306 *
307 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
308 * more -Z stuff folded in; re-order changes to put -Z stuff
309 * after -Y stuff (to make changes clearer)
310 *
311 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
312 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
313 * Add code to send break. Clear firmware ID word at startup (so
314 * that other code won't talk to inactive board).
315 *
316 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
317 * add code for -Z in set_line_char
318 *
319 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
320 * fold more -Z stuff (or in some cases, error messages)
321 * into driver; add text to "don't know what to do" messages.
322 *
323 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
324 * moved compile-time flags near top of file; cosmetic changes
325 * to narrow text (to allow 2-up printing); changed many declarations
326 * to "static" to limit external symbols; shuffled code order to
327 * coalesce -Y and -Z specific code, also to put internal functions
328 * in order of tty_driver structure; added code to recognize -Z
329 * ports (and for moment, do nothing or report error); add cy_startup
330 * to parse boot command line for extra base addresses for ISA probes;
331 *
332 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
333 * reorder some code, fix types of some vars (int vs. long),
334 * add cy_setup to support user declared ISA addresses
335 *
336 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
337 * dump ioctl based firmware load (it's now a user level
338 * program); ensure uninitialzed ports cannot be used
339 *
340 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
341 * rename vars and restructure some code
342 *
343 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
344 * get right status back after boot load
345 *
346 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
347 * successfully loads firmware
348 *
349 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
350 * add more of the code for the boot/load ioctls
351 *
352 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
353 * start to add Z functionality--starting with ioctl
354 * for loading firmware
355 *
356 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
357 * added code to recognize Z/PCI card at initialization; report
358 * presence, but card is not initialized (because firmware needs
359 * to be loaded)
360 *
361 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
362 * starting minor number at zero; added missing verify_area
363 * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
364 *
365 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
366 * remove unneeded boot message & fix CLOCAL hardware flow
367 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
368 * remove unused diagnostic statements; minor 0 is first;
369 *
370 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
371 * The kernel function vremap (available only in later 1.3.xx kernels)
372 * allows the access to memory addresses above the RAM. This revision
373 * of the driver supports PCI boards below 1Mb (device id 0x100) and
374 * above 1Mb (device id 0x101).
375 *
376 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
377 * Some global changes to interrupt handling spilled into
378 * this driver--mostly unused arguments in system function
379 * calls. Also added change by Marcio Saito which should
380 * reduce lost interrupts at startup by fast processors.
381 *
382 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
383 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
384 * in 1.3.41 kernel to remove a possible race condition, extend
385 * some error messages, and let the driver run as a loadable module
386 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
387 * possible race condition.
388 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
389 *
390 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
391 * Changes by Linus Torvalds in 1.3.33 kernel distribution
392 * required due to reordering of driver initialization.
393 * Drivers are now initialized *after* memory management.
394 *
395 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
396 * remove printk from ISR; fix typo
397 *
398 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
399 * Minor fixes in the PCI board support. PCI function calls in
400 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
401 * <duncan@okay.com>. "bad serial count" message removed.
402 *
403 * Revision 1.36.3 1995/08/22 09:19:42 marcio
404 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
405 * board initialization. Changes in the boot messages. The driver
406 * supports up to 4 boards and 64 ports by default.
407 *
408 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
409 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
410 *
411 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
412 * add missing break in modem control block in ioctl switch statement
413 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
414 *
415 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
416 * make sure CTS flow control is set as soon as possible (thanks
417 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
418 *
419 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
420 * initialize defaults for receive threshold and stale data timeout;
421 * cosmetic changes;
422 *
423 * Revision 1.36 1995/03/10 23:33:53 bentson
424 * added support of chips 4-7 in 32 port Cyclom-Ye;
425 * fix cy_interrupt pointer dereference problem
426 * (Joe Portman <baron@aa.net>);
427 * give better error response if open is attempted on non-existent port
428 * (Zachariah Vaum <jchryslr@netcom.com>);
429 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
430 * conditional compilation for -16Y on systems with fast, noisy bus;
431 * comment out diagnostic print function;
432 * cleaned up table of base addresses;
433 * set receiver time-out period register to correct value,
434 * set receive threshold to better default values,
435 * set chip timer to more accurate 200 Hz ticking,
436 * add code to monitor and modify receive parameters
437 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
438 * <njs@scifi.emi.net>);
439 *
440 * Revision 1.35 1994/12/16 13:54:18 steffen
441 * additional patch by Marcio Saito for board detection
442 * Accidently left out in 1.34
443 *
444 * Revision 1.34 1994/12/10 12:37:12 steffen
445 * This is the corrected version as suggested by Marcio Saito
446 *
447 * Revision 1.33 1994/12/01 22:41:18 bentson
448 * add hooks to support more high speeds directly; add tytso
449 * patch regarding CLOCAL wakeups
450 *
451 * Revision 1.32 1994/11/23 19:50:04 bentson
452 * allow direct kernel control of higher signalling rates;
453 * look for cards at additional locations
454 *
455 * Revision 1.31 1994/11/16 04:33:28 bentson
456 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
457 * a problem in chars_in_buffer has been resolved by some
458 * small changes; this should yield smoother output
459 *
460 * Revision 1.30 1994/11/16 04:28:05 bentson
461 * Fix from Corey Minyard, Internet: minyard@metronet.com,
462 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
463 * cy_hangup that appears to clear up much (all?) of the
464 * DTR glitches; also he's added/cleaned-up diagnostic messages
465 *
466 * Revision 1.29 1994/11/16 04:16:07 bentson
467 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
468 * operate higher speeds in same way as other serial ports;
469 * add more serial ports (for up to two 16-port muxes).
470 *
471 * Revision 1.28 1994/11/04 00:13:16 root
472 * turn off diagnostic messages
473 *
474 * Revision 1.27 1994/11/03 23:46:37 root
475 * bunch of changes to bring driver into greater conformance
476 * with the serial.c driver (looking for missed fixes)
477 *
478 * Revision 1.26 1994/11/03 22:40:36 root
479 * automatic interrupt probing fixed.
480 *
481 * Revision 1.25 1994/11/03 20:17:02 root
482 * start to implement auto-irq
483 *
484 * Revision 1.24 1994/11/03 18:01:55 root
485 * still working on modem signals--trying not to drop DTR
486 * during the getty/login processes
487 *
488 * Revision 1.23 1994/11/03 17:51:36 root
489 * extend baud rate support; set receive threshold as function
490 * of baud rate; fix some problems with RTS/CTS;
491 *
492 * Revision 1.22 1994/11/02 18:05:35 root
493 * changed arguments to udelay to type long to get
494 * delays to be of correct duration
495 *
496 * Revision 1.21 1994/11/02 17:37:30 root
497 * employ udelay (after calibrating loops_per_second earlier
498 * in init/main.c) instead of using home-grown delay routines
499 *
500 * Revision 1.20 1994/11/02 03:11:38 root
501 * cy_chars_in_buffer forces a return value of 0 to let
502 * login work (don't know why it does); some functions
503 * that were returning EFAULT, now executes the code;
504 * more work on deciding when to disable xmit interrupts;
505 *
506 * Revision 1.19 1994/11/01 20:10:14 root
507 * define routine to start transmission interrupts (by enabling
508 * transmit interrupts); directly enable/disable modem interrupts;
509 *
510 * Revision 1.18 1994/11/01 18:40:45 bentson
511 * Don't always enable transmit interrupts in startup; interrupt on
512 * TxMpty instead of TxRdy to help characters get out before shutdown;
513 * restructure xmit interrupt to check for chars first and quit if
514 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
515 * (to my view);
516 *
517 * Revision 1.17 1994/10/30 04:39:45 bentson
518 * rename serial_driver and callout_driver to cy_serial_driver and
519 * cy_callout_driver to avoid linkage interference; initialize
520 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
521 * from cyclades_port structure; add paranoia check to cy_close;
522 *
523 * Revision 1.16 1994/10/30 01:14:33 bentson
524 * change major numbers; add some _early_ return statements;
525 *
526 * Revision 1.15 1994/10/29 06:43:15 bentson
527 * final tidying up for clean compile; enable some error reporting
528 *
529 * Revision 1.14 1994/10/28 20:30:22 Bentson
530 * lots of changes to drag the driver towards the new tty_io
531 * structures and operation. not expected to work, but may
532 * compile cleanly.
533 *
534 * Revision 1.13 1994/07/21 23:08:57 Bentson
535 * add some diagnostic cruft; support 24 lines (for testing
536 * both -8Y and -16Y cards; be more thorough in servicing all
537 * chips during interrupt; add "volatile" a few places to
538 * circumvent compiler optimizations; fix base & offset
539 * computations in block_til_ready (was causing chip 0 to
540 * stop operation)
541 *
542 * Revision 1.12 1994/07/19 16:42:11 Bentson
543 * add some hackery for kernel version 1.1.8; expand
544 * error messages; refine timing for delay loops and
545 * declare loop params volatile
546 *
547 * Revision 1.11 1994/06/11 21:53:10 bentson
548 * get use of save_car right in transmit interrupt service
549 *
550 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
551 * add some diagnostic printing; try to fix save_car stuff
552 *
553 * Revision 1.10 1994/06/11 20:36:08 bentson
554 * clean up compiler warnings
555 *
556 * Revision 1.9 1994/06/11 19:42:46 bentson
557 * added a bunch of code to support modem signalling
558 *
559 * Revision 1.8 1994/06/11 17:57:07 bentson
560 * recognize break & parity error
561 *
562 * Revision 1.7 1994/06/05 05:51:34 bentson
563 * Reorder baud table to be monotonic; add cli to CP; discard
564 * incoming characters and status if the line isn't open; start to
565 * fold code into cy_throttle; start to port get_serial_info,
566 * set_serial_info, get_modem_info, set_modem_info, and send_break
567 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
568 * get flow control characters from tty struct; invalidate ports w/o
569 * hardware;
570 *
571 * Revision 1.6 1994/05/31 18:42:21 bentson
572 * add a loop-breaker in the interrupt service routine;
573 * note when port is initialized so that it can be shut
574 * down under the right conditions; receive works without
575 * any obvious errors
576 *
577 * Revision 1.5 1994/05/30 00:55:02 bentson
578 * transmit works without obvious errors
579 *
580 * Revision 1.4 1994/05/27 18:46:27 bentson
581 * incorporated more code from lib_y.c; can now print short
582 * strings under interrupt control to port zero; seems to
583 * select ports/channels/lines correctly
584 *
585 * Revision 1.3 1994/05/25 22:12:44 bentson
586 * shifting from multi-port on a card to proper multiplexor
587 * data structures; added skeletons of most routines
588 *
589 * Revision 1.2 1994/05/19 13:21:43 bentson
590 * start to crib from other sources
591 *
592 */
593
096dcfce
JS		 594#define CY_VERSION "2.4"
595
1da177e4
LT		 596/* If you need to install more boards than NR_CARDS, change the constant
597 in the definition below. No other change is necessary to support up to
598 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
599
02f1175c 600#define NR_CARDS 4
1da177e4
LT		 601
602/*
603 If the total number of ports is larger than NR_PORTS, change this
604 constant in the definition below. No other change is necessary to
605 support more boards/ports. */
606
02f1175c 607#define NR_PORTS 256
1da177e4
LT		 608
609#define ZE_V1_NPORTS 64
610#define ZO_V1 0
611#define ZO_V2 1
612#define ZE_V1 2
613
614#define SERIAL_PARANOIA_CHECK
615#undef CY_DEBUG_OPEN
616#undef CY_DEBUG_THROTTLE
617#undef CY_DEBUG_OTHER
618#undef CY_DEBUG_IO
619#undef CY_DEBUG_COUNT
620#undef CY_DEBUG_DTR
621#undef CY_DEBUG_WAIT_UNTIL_SENT
622#undef CY_DEBUG_INTERRUPTS
623#undef CY_16Y_HACK
624#undef CY_ENABLE_MONITORING
625#undef CY_PCI_DEBUG
626
1da177e4
LT		 627/*
628 * Include section
629 */
1da177e4
LT		 630#include <linux/module.h>
631#include <linux/errno.h>
632#include <linux/signal.h>
633#include <linux/sched.h>
634#include <linux/timer.h>
635#include <linux/interrupt.h>
636#include <linux/tty.h>
33f0f88f 637#include <linux/tty_flip.h>
1da177e4
LT		 638#include <linux/serial.h>
639#include <linux/major.h>
640#include <linux/string.h>
641#include <linux/fcntl.h>
642#include <linux/ptrace.h>
643#include <linux/cyclades.h>
644#include <linux/mm.h>
645#include <linux/ioport.h>
646#include <linux/init.h>
647#include <linux/delay.h>
648#include <linux/spinlock.h>
649#include <linux/bitops.h>
650
651#include <asm/system.h>
652#include <asm/io.h>
653#include <asm/irq.h>
654#include <asm/uaccess.h>
655
656#define CY_LOCK(info,flags) \
657 do { \
658 spin_lock_irqsave(&cy_card[info->card].card_lock, flags); \
659 } while (0)
02f1175c 660
1da177e4
LT		 661#define CY_UNLOCK(info,flags) \
662 do { \
663 spin_unlock_irqrestore(&cy_card[info->card].card_lock, flags); \
664 } while (0)
665
1da177e4
LT		 666#include <linux/kernel.h>
667#include <linux/pci.h>
668
669#include <linux/stat.h>
670#include <linux/proc_fs.h>
671
02f1175c
JS		 672static void cy_throttle(struct tty_struct *tty);
673static void cy_send_xchar(struct tty_struct *tty, char ch);
1da177e4
LT		 674
675#define IS_CYC_Z(card) ((card).num_chips == -1)
676
677#define Z_FPGA_CHECK(card) \
db05c3b1 678 ((readl(&((struct RUNTIME_9060 __iomem *) \
02f1175c 679 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
1da177e4 680
db05c3b1 681#define ISZLOADED(card) (((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \
1da177e4
LT		 682 ((card).ctl_addr))->mail_box_0)) || \
683 Z_FPGA_CHECK(card)) && \
db05c3b1 684 (ZFIRM_ID==readl(&((struct FIRM_ID __iomem *) \
1da177e4
LT		 685 ((card).base_addr+ID_ADDRESS))->signature)))
686
687#ifndef SERIAL_XMIT_SIZE
688#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
689#endif
690#define WAKEUP_CHARS 256
691
692#define STD_COM_FLAGS (0)
693
1da177e4
LT		 694static struct tty_driver *cy_serial_driver;
695
696#ifdef CONFIG_ISA
697/* This is the address lookup table. The driver will probe for
698 Cyclom-Y/ISA boards at all addresses in here. If you want the
699 driver to probe addresses at a different address, add it to
700 this table. If the driver is probing some other board and
701 causing problems, remove the offending address from this table.
702 The cy_setup function extracts additional addresses from the
703 boot options line. The form is "cyclades=address,address..."
704*/
705
706static unsigned int cy_isa_addresses[] = {
02f1175c
JS		 707 0xD0000,
708 0xD2000,
709 0xD4000,
710 0xD6000,
711 0xD8000,
712 0xDA000,
713 0xDC000,
714 0xDE000,
715 0, 0, 0, 0, 0, 0, 0, 0
1da177e4 716};
02f1175c 717
fe971071 718#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
1da177e4
LT		 719
720#ifdef MODULE
721static long maddr[NR_CARDS] = { 0, };
02f1175c 722static int irq[NR_CARDS] = { 0, };
1da177e4
LT		 723
724module_param_array(maddr, long, NULL, 0);
725module_param_array(irq, int, NULL, 0);
726#endif
727
02f1175c 728#endif /* CONFIG_ISA */
1da177e4
LT		 729
730/* This is the per-card data structure containing address, irq, number of
731 channels, etc. This driver supports a maximum of NR_CARDS cards.
732*/
733static struct cyclades_card cy_card[NR_CARDS];
734
735/* This is the per-channel data structure containing pointers, flags
736 and variables for the port. This driver supports a maximum of NR_PORTS.
737*/
738static struct cyclades_port cy_port[NR_PORTS];
739
02f1175c 740static int cy_next_channel; /* next minor available */
1da177e4 741
1da177e4
LT		 742/*
743 * This is used to look up the divisor speeds and the timeouts
744 * We're normally limited to 15 distinct baud rates. The extra
745 * are accessed via settings in info->flags.
746 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
747 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
748 * HI VHI
749 * 20
750 */
751static int baud_table[] = {
02f1175c
JS		 752 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
753 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
754 230400, 0
755};
756
757static char baud_co_25[] = { /* 25 MHz clock option table */
758 /* value => 00 01 02 03 04 */
759 /* divide by 8 32 128 512 2048 */
760 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
761 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
762};
763
764static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
765 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
766 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
767};
768
769static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
770 /* value => 00 01 02 03 04 */
771 /* divide by 8 32 128 512 2048 */
772 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
773 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
774 0x00
775};
776
777static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
778 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
779 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
780 0x21
781};
782
783static char baud_cor3[] = { /* receive threshold */
784 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
785 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
786 0x07
787};
1da177e4
LT		 788
789/*
790 * The Cyclades driver implements HW flow control as any serial driver.
791 * The cyclades_port structure member rflow and the vector rflow_thr
792 * allows us to take advantage of a special feature in the CD1400 to avoid
793 * data loss even when the system interrupt latency is too high. These flags
794 * are to be used only with very special applications. Setting these flags
795 * requires the use of a special cable (DTR and RTS reversed). In the new
796 * CD1400-based boards (rev. 6.00 or later), there is no need for special
797 * cables.
798 */
799
02f1175c
JS		 800static char rflow_thr[] = { /* rflow threshold */
801 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
802 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
803 0x0a
804};
1da177e4
LT		 805
806/* The Cyclom-Ye has placed the sequential chips in non-sequential
807 * address order. This look-up table overcomes that problem.
808 */
02f1175c
JS		 809static int cy_chip_offset[] = { 0x0000,
810 0x0400,
811 0x0800,
812 0x0C00,
813 0x0200,
814 0x0600,
815 0x0A00,
816 0x0E00
817};
1da177e4
LT		 818
819/* PCI related definitions */
820
02f1175c
JS		 821static unsigned short cy_pci_nboard;
822static unsigned short cy_isa_nboard;
823static unsigned short cy_nboard;
1da177e4 824#ifdef CONFIG_PCI
893de2df
JS		 825static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
826 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, /* PCI < 1Mb */
827 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, /* PCI > 1Mb */
828 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, /* 4Y PCI < 1Mb */
829 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, /* 4Y PCI > 1Mb */
830 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, /* 8Y PCI < 1Mb */
831 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, /* 8Y PCI > 1Mb */
832 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, /* Z PCI < 1Mb */
833 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, /* Z PCI > 1Mb */
834 { } /* end of table */
02f1175c 835};
893de2df 836MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
1da177e4
LT		 837#endif
838
839static void cy_start(struct tty_struct *);
840static void set_line_char(struct cyclades_port *);
1a86b5e3 841static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
1da177e4
LT		 842#ifdef CONFIG_ISA
843static unsigned detect_isa_irq(void __iomem *);
02f1175c 844#endif /* CONFIG_ISA */
1da177e4 845
02f1175c 846static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
1da177e4
LT		 847
848#ifndef CONFIG_CYZ_INTR
849static void cyz_poll(unsigned long);
850
851/* The Cyclades-Z polling cycle is defined by this variable */
852static long cyz_polling_cycle = CZ_DEF_POLL;
853
8d06afab 854static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
1da177e4 855
02f1175c 856#else /* CONFIG_CYZ_INTR */
1da177e4
LT		 857static void cyz_rx_restart(unsigned long);
858static struct timer_list cyz_rx_full_timer[NR_PORTS];
02f1175c 859#endif /* CONFIG_CYZ_INTR */
1da177e4 860
02f1175c
JS		 861static inline int serial_paranoia_check(struct cyclades_port *info,
862 char *name, const char *routine)
1da177e4
LT		 863{
864#ifdef SERIAL_PARANOIA_CHECK
02f1175c 865 if (!info) {
096dcfce
JS		 866 printk("cyc Warning: null cyclades_port for (%s) in %s\n",
867 name, routine);
02f1175c
JS		 868 return 1;
869 }
870
871 if ((long)info < (long)(&cy_port[0]) ||
872 (long)(&cy_port[NR_PORTS]) < (long)info) {
096dcfce
JS		 873 printk("cyc Warning: cyclades_port out of range for (%s) in "
874 "%s\n", name, routine);
02f1175c
JS		 875 return 1;
876 }
877
878 if (info->magic != CYCLADES_MAGIC) {
096dcfce
JS		 879 printk("cyc Warning: bad magic number for serial struct (%s) "
880 "in %s\n", name, routine);
02f1175c
JS		 881 return 1;
882 }
1da177e4 883#endif
02f1175c
JS		 884 return 0;
885} /* serial_paranoia_check */
1da177e4
LT		 886
887/*
888 * This routine is used by the interrupt handler to schedule
889 * processing in the software interrupt portion of the driver
890 * (also known as the "bottom half"). This can be called any
891 * number of times for any channel without harm.
892 */
02f1175c 893static inline void cy_sched_event(struct cyclades_port *info, int event)
1da177e4 894{
02f1175c
JS		 895 info->event |= 1 << event; /* remember what kind of event and who */
896 schedule_work(&info->tqueue);
897} /* cy_sched_event */
1da177e4
LT		 898
899/*
900 * This routine is used to handle the "bottom half" processing for the
901 * serial driver, known also the "software interrupt" processing.
902 * This processing is done at the kernel interrupt level, after the
903 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
904 * is where time-consuming activities which can not be done in the
905 * interrupt driver proper are done; the interrupt driver schedules
906 * them using cy_sched_event(), and they get done here.
907 *
908 * This is done through one level of indirection--the task queue.
909 * When a hardware interrupt service routine wants service by the
910 * driver's bottom half, it enqueues the appropriate tq_struct (one
911 * per port) to the keventd work queue and sets a request flag
912 * that the work queue be processed.
913 *
914 * Although this may seem unwieldy, it gives the system a way to
915 * pass an argument (in this case the pointer to the cyclades_port
916 * structure) to the bottom half of the driver. Previous kernels
917 * had to poll every port to see if that port needed servicing.
918 */
919static void
c4028958 920do_softint(struct work_struct *work)
1da177e4 921{
c4028958
DH		 922 struct cyclades_port *info =
923 container_of(work, struct cyclades_port, tqueue);
02f1175c
JS		 924 struct tty_struct *tty;
925
926 tty = info->tty;
927 if (!tty)
928 return;
929
930 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
931 tty_hangup(info->tty);
932 wake_up_interruptible(&info->open_wait);
933 info->flags &= ~ASYNC_NORMAL_ACTIVE;
934 }
935 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
936 wake_up_interruptible(&info->open_wait);
1da177e4 937#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 938 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
939 if (cyz_rx_full_timer[info->line].function == NULL) {
940 cyz_rx_full_timer[info->line].expires = jiffies + 1;
941 cyz_rx_full_timer[info->line].function = cyz_rx_restart;
942 cyz_rx_full_timer[info->line].data =
943 (unsigned long)info;
944 add_timer(&cyz_rx_full_timer[info->line]);
945 }
1da177e4 946 }
1da177e4 947#endif
02f1175c
JS		 948 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
949 wake_up_interruptible(&info->delta_msr_wait);
950 tty_wakeup(tty);
1da177e4 951#ifdef Z_WAKE
02f1175c
JS		 952 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
953 wake_up_interruptible(&info->shutdown_wait);
1da177e4
LT		 954#endif
955} /* do_softint */
956
957
958/***********************************************************/
959/********* Start of block of Cyclom-Y specific code ********/
960
961/* This routine waits up to 1000 micro-seconds for the previous
962 command to the Cirrus chip to complete and then issues the
963 new command. An error is returned if the previous command
964 didn't finish within the time limit.
965
966 This function is only called from inside spinlock-protected code.
967 */
02f1175c 968static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
1da177e4 969{
ad39c300 970 unsigned int i;
1da177e4 971
02f1175c
JS		 972 /* Check to see that the previous command has completed */
973 for (i = 0; i < 100; i++) {
db05c3b1 974 if (readb(base_addr + (CyCCR << index)) == 0) {
02f1175c
JS		 975 break;
976 }
977 udelay(10L);
1da177e4 978 }
02f1175c
JS		 979 /* if the CCR never cleared, the previous command
980 didn't finish within the "reasonable time" */
981 if (i == 100)
096dcfce 982 return -1;
1da177e4 983
02f1175c
JS		 984 /* Issue the new command */
985 cy_writeb(base_addr + (CyCCR << index), cmd);
1da177e4 986
096dcfce 987 return 0;
02f1175c 988} /* cyy_issue_cmd */
1da177e4
LT		 989
990#ifdef CONFIG_ISA
991/* ISA interrupt detection code */
02f1175c 992static unsigned detect_isa_irq(void __iomem * address)
1da177e4 993{
02f1175c
JS		 994 int irq;
995 unsigned long irqs, flags;
996 int save_xir, save_car;
997 int index = 0; /* IRQ probing is only for ISA */
998
999 /* forget possible initially masked and pending IRQ */
1000 irq = probe_irq_off(probe_irq_on());
1001
1002 /* Clear interrupts on the board first */
1003 cy_writeb(address + (Cy_ClrIntr << index), 0);
1004 /* Cy_ClrIntr is 0x1800 */
1005
1006 irqs = probe_irq_on();
1007 /* Wait ... */
1008 udelay(5000L);
1009
1010 /* Enable the Tx interrupts on the CD1400 */
1011 local_irq_save(flags);
1012 cy_writeb(address + (CyCAR << index), 0);
1013 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
1014
1015 cy_writeb(address + (CyCAR << index), 0);
1016 cy_writeb(address + (CySRER << index),
db05c3b1 1017 readb(address + (CySRER << index)) | CyTxRdy);
02f1175c
JS		 1018 local_irq_restore(flags);
1019
1020 /* Wait ... */
1021 udelay(5000L);
1022
1023 /* Check which interrupt is in use */
1024 irq = probe_irq_off(irqs);
1025
1026 /* Clean up */
db05c3b1
JS		 1027 save_xir = (u_char) readb(address + (CyTIR << index));
1028 save_car = readb(address + (CyCAR << index));
02f1175c
JS		 1029 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1030 cy_writeb(address + (CySRER << index),
db05c3b1 1031 readb(address + (CySRER << index)) & ~CyTxRdy);
02f1175c
JS		 1032 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1033 cy_writeb(address + (CyCAR << index), (save_car));
1034 cy_writeb(address + (Cy_ClrIntr << index), 0);
1035 /* Cy_ClrIntr is 0x1800 */
1036
1037 return (irq > 0) ? irq : 0;
1da177e4 1038}
02f1175c 1039#endif /* CONFIG_ISA */
1da177e4 1040
e941027f 1041static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
02f1175c 1042 void __iomem * base_addr, int status, int index)
e941027f
JS		 1043{
1044 struct cyclades_port *info;
1045 struct tty_struct *tty;
ad39c300 1046 int char_count;
e941027f
JS		 1047 int i, j, len, mdm_change, mdm_status, outch;
1048 int save_xir, channel, save_car;
1049 char data;
1050
02f1175c 1051 if (status & CySRReceive) { /* reception interrupt */
e941027f 1052#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1053 printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
e941027f 1054#endif
02f1175c
JS		 1055 /* determine the channel & change to that context */
1056 spin_lock(&cinfo->card_lock);
db05c3b1 1057 save_xir = (u_char) readb(base_addr + (CyRIR << index));
02f1175c
JS		 1058 channel = (u_short) (save_xir & CyIRChannel);
1059 i = channel + chip * 4 + cinfo->first_line;
1060 info = &cy_port[i];
1061 info->last_active = jiffies;
db05c3b1 1062 save_car = readb(base_addr + (CyCAR << index));
02f1175c
JS		 1063 cy_writeb(base_addr + (CyCAR << index), save_xir);
1064
1065 /* if there is nowhere to put the data, discard it */
1066 if (info->tty == 0) {
db05c3b1 1067 j = (readb(base_addr + (CyRIVR << index)) &
02f1175c
JS		 1068 CyIVRMask);
1069 if (j == CyIVRRxEx) { /* exception */
db05c3b1 1070 data = readb(base_addr + (CyRDSR << index));
02f1175c 1071 } else { /* normal character reception */
db05c3b1 1072 char_count = readb(base_addr +
02f1175c
JS		 1073 (CyRDCR << index));
1074 while (char_count--) {
db05c3b1 1075 data = readb(base_addr +
02f1175c 1076 (CyRDSR << index));
e941027f 1077 }
e941027f 1078 }
02f1175c
JS		 1079 } else { /* there is an open port for this data */
1080 tty = info->tty;
db05c3b1 1081 j = (readb(base_addr + (CyRIVR << index)) &
02f1175c
JS		 1082 CyIVRMask);
1083 if (j == CyIVRRxEx) { /* exception */
db05c3b1 1084 data = readb(base_addr + (CyRDSR << index));
02f1175c
JS		 1085
1086 /* For statistics only */
1087 if (data & CyBREAK)
1088 info->icount.brk++;
1089 else if (data & CyFRAME)
1090 info->icount.frame++;
1091 else if (data & CyPARITY)
1092 info->icount.parity++;
1093 else if (data & CyOVERRUN)
1094 info->icount.overrun++;
1095
1096 if (data & info->ignore_status_mask) {
1097 info->icount.rx++;
1098 return;
1099 }
1100 if (tty_buffer_request_room(tty, 1)) {
1101 if (data & info->read_status_mask) {
1102 if (data & CyBREAK) {
1103 tty_insert_flip_char(
1104 tty,
db05c3b1 1105 readb(
02f1175c
JS		 1106 base_addr +
1107 (CyRDSR <<
1108 index)),
1109 TTY_BREAK);
1110 info->icount.rx++;
1111 if (info->flags &
1112 ASYNC_SAK) {
1113 do_SAK(tty);
1114 }
1115 } else if (data & CyFRAME) {
1116 tty_insert_flip_char(
1117 tty,
db05c3b1 1118 readb(
02f1175c
JS		 1119 base_addr +
1120 (CyRDSR <<
1121 index)),
1122 TTY_FRAME);
1123 info->icount.rx++;
1124 info->idle_stats.
1125 frame_errs++;
1126 } else if (data & CyPARITY) {
1127 /* Pieces of seven... */
1128 tty_insert_flip_char(
1129 tty,
db05c3b1 1130 readb(
02f1175c
JS		 1131 base_addr +
1132 (CyRDSR <<
1133 index)),
1134 TTY_PARITY);
1135 info->icount.rx++;
1136 info->idle_stats.
1137 parity_errs++;
1138 } else if (data & CyOVERRUN) {
1139 tty_insert_flip_char(
1140 tty, 0,
1141 TTY_OVERRUN);
1142 info->icount.rx++;
1143 /* If the flip buffer itself is
1144 overflowing, we still lose
1145 the next incoming character.
1146 */
1147 tty_insert_flip_char(
1148 tty,
db05c3b1 1149 readb(
02f1175c
JS		 1150 base_addr +
1151 (CyRDSR <<
1152 index)),
1153 TTY_FRAME);
1154 info->icount.rx++;
1155 info->idle_stats.
1156 overruns++;
1157 /* These two conditions may imply */
1158 /* a normal read should be done. */
1159 /* }else if(data & CyTIMEOUT){ */
1160 /* }else if(data & CySPECHAR){ */
1161 } else {
1162 tty_insert_flip_char(
1163 tty, 0,
1164 TTY_NORMAL);
1165 info->icount.rx++;
1166 }
1167 } else {
1168 tty_insert_flip_char(tty, 0,
1169 TTY_NORMAL);
1170 info->icount.rx++;
1171 }
1172 } else {
1173 /* there was a software buffer
1174 overrun and nothing could be
1175 done about it!!! */
1176 info->icount.buf_overrun++;
1177 info->idle_stats.overruns++;
1178 }
1179 } else { /* normal character reception */
1180 /* load # chars available from the chip */
db05c3b1 1181 char_count = readb(base_addr +
02f1175c 1182 (CyRDCR << index));
e941027f
JS		 1183
1184#ifdef CY_ENABLE_MONITORING
02f1175c
JS		 1185 ++info->mon.int_count;
1186 info->mon.char_count += char_count;
1187 if (char_count > info->mon.char_max)
1188 info->mon.char_max = char_count;
1189 info->mon.char_last = char_count;
e941027f 1190#endif
02f1175c
JS		 1191 len = tty_buffer_request_room(tty, char_count);
1192 while (len--) {
db05c3b1 1193 data = readb(base_addr +
02f1175c
JS		 1194 (CyRDSR << index));
1195 tty_insert_flip_char(tty, data,
1196 TTY_NORMAL);
1197 info->idle_stats.recv_bytes++;
1198 info->icount.rx++;
e941027f 1199#ifdef CY_16Y_HACK
02f1175c 1200 udelay(10L);
e941027f 1201#endif
02f1175c
JS		 1202 }
1203 info->idle_stats.recv_idle = jiffies;
1204 }
1205 tty_schedule_flip(tty);
e941027f 1206 }
02f1175c
JS		 1207 /* end of service */
1208 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1209 cy_writeb(base_addr + (CyCAR << index), (save_car));
1210 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1211 }
1212
02f1175c
JS		 1213 if (status & CySRTransmit) { /* transmission interrupt */
1214 /* Since we only get here when the transmit buffer
1215 is empty, we know we can always stuff a dozen
1216 characters. */
e941027f 1217#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1218 printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
e941027f
JS		 1219#endif
1220
02f1175c
JS		 1221 /* determine the channel & change to that context */
1222 spin_lock(&cinfo->card_lock);
db05c3b1 1223 save_xir = (u_char) readb(base_addr + (CyTIR << index));
02f1175c
JS		 1224 channel = (u_short) (save_xir & CyIRChannel);
1225 i = channel + chip * 4 + cinfo->first_line;
db05c3b1 1226 save_car = readb(base_addr + (CyCAR << index));
02f1175c
JS		 1227 cy_writeb(base_addr + (CyCAR << index), save_xir);
1228
1229 /* validate the port# (as configured and open) */
1230 if ((i < 0) || (NR_PORTS <= i)) {
1231 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1232 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1233 ~CyTxRdy);
1234 goto txend;
e941027f 1235 }
02f1175c
JS		 1236 info = &cy_port[i];
1237 info->last_active = jiffies;
1238 if (info->tty == 0) {
1239 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1240 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1241 ~CyTxRdy);
1242 goto txdone;
e941027f 1243 }
02f1175c
JS		 1244
1245 /* load the on-chip space for outbound data */
1246 char_count = info->xmit_fifo_size;
1247
1248 if (info->x_char) { /* send special char */
1249 outch = info->x_char;
1250 cy_writeb(base_addr + (CyTDR << index), outch);
1251 char_count--;
1252 info->icount.tx++;
1253 info->x_char = 0;
e941027f 1254 }
02f1175c
JS		 1255
1256 if (info->breakon || info->breakoff) {
1257 if (info->breakon) {
1258 cy_writeb(base_addr + (CyTDR << index), 0);
1259 cy_writeb(base_addr + (CyTDR << index), 0x81);
1260 info->breakon = 0;
1261 char_count -= 2;
1262 }
1263 if (info->breakoff) {
1264 cy_writeb(base_addr + (CyTDR << index), 0);
1265 cy_writeb(base_addr + (CyTDR << index), 0x83);
1266 info->breakoff = 0;
1267 char_count -= 2;
1268 }
e941027f 1269 }
02f1175c
JS		 1270
1271 while (char_count-- > 0) {
1272 if (!info->xmit_cnt) {
db05c3b1 1273 if (readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1274 CyTxMpty) {
1275 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1276 readb(base_addr +
02f1175c
JS		 1277 (CySRER << index)) &
1278 ~CyTxMpty);
1279 } else {
1280 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1281 (readb(base_addr +
02f1175c
JS		 1282 (CySRER << index)) &
1283 ~CyTxRdy) | CyTxMpty);
1284 }
1285 goto txdone;
1286 }
1287 if (info->xmit_buf == 0) {
1288 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1289 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1290 ~CyTxRdy);
1291 goto txdone;
1292 }
1293 if (info->tty->stopped || info->tty->hw_stopped) {
1294 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1295 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1296 ~CyTxRdy);
1297 goto txdone;
1298 }
1299 /* Because the Embedded Transmit Commands have
1300 been enabled, we must check to see if the
1301 escape character, NULL, is being sent. If it
1302 is, we must ensure that there is room for it
1303 to be doubled in the output stream. Therefore
1304 we no longer advance the pointer when the
1305 character is fetched, but rather wait until
1306 after the check for a NULL output character.
1307 This is necessary because there may not be
1308 room for the two chars needed to send a NULL.)
1309 */
1310 outch = info->xmit_buf[info->xmit_tail];
1311 if (outch) {
1312 info->xmit_cnt--;
1313 info->xmit_tail = (info->xmit_tail + 1) &
1314 (SERIAL_XMIT_SIZE - 1);
1315 cy_writeb(base_addr + (CyTDR << index), outch);
1316 info->icount.tx++;
1317 } else {
1318 if (char_count > 1) {
1319 info->xmit_cnt--;
1320 info->xmit_tail = (info->xmit_tail + 1)&
1321 (SERIAL_XMIT_SIZE - 1);
1322 cy_writeb(base_addr + (CyTDR << index),
1323 outch);
1324 cy_writeb(base_addr + (CyTDR << index),
1325 0);
1326 info->icount.tx++;
1327 char_count--;
1328 } else {
1329 }
1330 }
e941027f 1331 }
e941027f
JS		 1332
1333txdone:
02f1175c
JS		 1334 if (info->xmit_cnt < WAKEUP_CHARS) {
1335 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1336 }
e941027f 1337txend:
02f1175c
JS		 1338 /* end of service */
1339 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1340 cy_writeb(base_addr + (CyCAR << index), (save_car));
1341 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1342 }
1343
02f1175c 1344 if (status & CySRModem) { /* modem interrupt */
e941027f 1345
02f1175c
JS		 1346 /* determine the channel & change to that context */
1347 spin_lock(&cinfo->card_lock);
db05c3b1 1348 save_xir = (u_char) readb(base_addr + (CyMIR << index));
02f1175c
JS		 1349 channel = (u_short) (save_xir & CyIRChannel);
1350 info = &cy_port[channel + chip * 4 + cinfo->first_line];
1351 info->last_active = jiffies;
db05c3b1 1352 save_car = readb(base_addr + (CyCAR << index));
02f1175c
JS		 1353 cy_writeb(base_addr + (CyCAR << index), save_xir);
1354
db05c3b1
JS		 1355 mdm_change = readb(base_addr + (CyMISR << index));
1356 mdm_status = readb(base_addr + (CyMSVR1 << index));
02f1175c
JS		 1357
1358 if (info->tty == 0) { /* no place for data, ignore it */
1359 ;
1360 } else {
1361 if (mdm_change & CyANY_DELTA) {
1362 /* For statistics only */
1363 if (mdm_change & CyDCD)
1364 info->icount.dcd++;
1365 if (mdm_change & CyCTS)
1366 info->icount.cts++;
1367 if (mdm_change & CyDSR)
1368 info->icount.dsr++;
1369 if (mdm_change & CyRI)
1370 info->icount.rng++;
1371
1372 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
e941027f 1373 }
02f1175c
JS		 1374
1375 if ((mdm_change & CyDCD) &&
1376 (info->flags & ASYNC_CHECK_CD)) {
1377 if (mdm_status & CyDCD) {
1378 cy_sched_event(info,
1379 Cy_EVENT_OPEN_WAKEUP);
1380 } else {
1381 cy_sched_event(info, Cy_EVENT_HANGUP);
1382 }
1383 }
1384 if ((mdm_change & CyCTS) &&
1385 (info->flags & ASYNC_CTS_FLOW)) {
1386 if (info->tty->hw_stopped) {
1387 if (mdm_status & CyCTS) {
1388 /* cy_start isn't used
1389 because... !!! */
1390 info->tty->hw_stopped = 0;
1391 cy_writeb(base_addr +
1392 (CySRER << index),
db05c3b1 1393 readb(base_addr +
02f1175c
JS		 1394 (CySRER <<
1395 index))|
1396 CyTxRdy);
1397 cy_sched_event(info,
1398 Cy_EVENT_WRITE_WAKEUP);
1399 }
1400 } else {
1401 if (!(mdm_status & CyCTS)) {
1402 /* cy_stop isn't used
1403 because ... !!! */
1404 info->tty->hw_stopped = 1;
1405 cy_writeb(base_addr +
1406 (CySRER << index),
db05c3b1 1407 readb(base_addr +
02f1175c
JS		 1408 (CySRER <<
1409 index)) &
1410 ~CyTxRdy);
1411 }
1412 }
1413 }
1414 if (mdm_change & CyDSR) {
1415 }
1416 if (mdm_change & CyRI) {
e941027f 1417 }
e941027f 1418 }
02f1175c
JS		 1419 /* end of service */
1420 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1421 cy_writeb(base_addr + (CyCAR << index), save_car);
1422 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1423 }
1424}
1425
1da177e4
LT		 1426/* The real interrupt service routine is called
1427 whenever the card wants its hand held--chars
1428 received, out buffer empty, modem change, etc.
1429 */
02f1175c 1430static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1da177e4 1431{
02f1175c
JS		 1432 int status;
1433 struct cyclades_card *cinfo;
1434 void __iomem *base_addr, *card_base_addr;
1435 int chip;
1436 int index;
1437 int too_many;
1438 int had_work;
1439
1440 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1da177e4 1441#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1442 printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
1da177e4 1443#endif
02f1175c
JS		 1444 return IRQ_NONE; /* spurious interrupt */
1445 }
1446
1447 card_base_addr = cinfo->base_addr;
1448 index = cinfo->bus_index;
1449
1450 /* This loop checks all chips in the card. Make a note whenever
1451 _any_ chip had some work to do, as this is considered an
1452 indication that there will be more to do. Only when no chip
1453 has any work does this outermost loop exit.
1454 */
1455 do {
1456 had_work = 0;
1457 for (chip = 0; chip < cinfo->num_chips; chip++) {
1458 base_addr = cinfo->base_addr +
1459 (cy_chip_offset[chip] << index);
1460 too_many = 0;
db05c3b1 1461 while ((status = readb(base_addr +
02f1175c
JS		 1462 (CySVRR << index))) != 0x00) {
1463 had_work++;
1464 /* The purpose of the following test is to ensure that
1465 no chip can monopolize the driver. This forces the
1466 chips to be checked in a round-robin fashion (after
1467 draining each of a bunch (1000) of characters).
1468 */
1469 if (1000 < too_many++) {
1470 break;
1471 }
1472 cyy_intr_chip(cinfo, chip, base_addr, status,
1473 index);
1474 }
1475 }
1476 } while (had_work);
1477
1478 /* clear interrupts */
1479 spin_lock(&cinfo->card_lock);
1480 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1481 /* Cy_ClrIntr is 0x1800 */
1482 spin_unlock(&cinfo->card_lock);
1483 return IRQ_HANDLED;
1484} /* cyy_interrupt */
1da177e4
LT		 1485
1486/***********************************************************/
1487/********* End of block of Cyclom-Y specific code **********/
1488/******** Start of block of Cyclades-Z specific code *********/
1489/***********************************************************/
1490
1491static int
02f1175c 1492cyz_fetch_msg(struct cyclades_card *cinfo,
1a86b5e3 1493 __u32 * channel, __u8 * cmd, __u32 * param)
1da177e4 1494{
02f1175c
JS		 1495 struct FIRM_ID __iomem *firm_id;
1496 struct ZFW_CTRL __iomem *zfw_ctrl;
1497 struct BOARD_CTRL __iomem *board_ctrl;
1498 unsigned long loc_doorbell;
1499
1500 firm_id = cinfo->base_addr + ID_ADDRESS;
1501 if (!ISZLOADED(*cinfo)) {
096dcfce 1502 return -1;
02f1175c 1503 }
db05c3b1 1504 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 1505 board_ctrl = &zfw_ctrl->board_ctrl;
1506
db05c3b1 1507 loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
02f1175c
JS		 1508 (cinfo->ctl_addr))->loc_doorbell);
1509 if (loc_doorbell) {
1510 *cmd = (char)(0xff & loc_doorbell);
db05c3b1
JS		 1511 *channel = readl(&board_ctrl->fwcmd_channel);
1512 *param = (__u32) readl(&board_ctrl->fwcmd_param);
02f1175c
JS		 1513 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1514 loc_doorbell, 0xffffffff);
1515 return 1;
1516 }
1517 return 0;
1518} /* cyz_fetch_msg */
1da177e4
LT		 1519
1520static int
02f1175c 1521cyz_issue_cmd(struct cyclades_card *cinfo,
1a86b5e3 1522 __u32 channel, __u8 cmd, __u32 param)
1da177e4 1523{
02f1175c
JS		 1524 struct FIRM_ID __iomem *firm_id;
1525 struct ZFW_CTRL __iomem *zfw_ctrl;
1526 struct BOARD_CTRL __iomem *board_ctrl;
1a86b5e3 1527 __u32 __iomem *pci_doorbell;
02f1175c
JS		 1528 int index;
1529
1530 firm_id = cinfo->base_addr + ID_ADDRESS;
1531 if (!ISZLOADED(*cinfo)) {
096dcfce 1532 return -1;
02f1175c 1533 }
db05c3b1 1534 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 1535 board_ctrl = &zfw_ctrl->board_ctrl;
1536
1537 index = 0;
1538 pci_doorbell =
1539 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
db05c3b1 1540 while ((readl(pci_doorbell) & 0xff) != 0) {
02f1175c 1541 if (index++ == 1000) {
db05c3b1 1542 return (int)(readl(pci_doorbell) & 0xff);
02f1175c
JS		 1543 }
1544 udelay(50L);
1545 }
1546 cy_writel(&board_ctrl->hcmd_channel, channel);
1547 cy_writel(&board_ctrl->hcmd_param, param);
1548 cy_writel(pci_doorbell, (long)cmd);
1549
096dcfce 1550 return 0;
02f1175c 1551} /* cyz_issue_cmd */
1da177e4
LT		 1552
1553static void
ad39c300
JS		 1554cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1555 struct BUF_CTRL __iomem *buf_ctrl)
1da177e4 1556{
02f1175c
JS		 1557 struct cyclades_card *cinfo = &cy_card[info->card];
1558 struct tty_struct *tty = info->tty;
ad39c300 1559 int char_count;
02f1175c 1560 int len;
1da177e4 1561#ifdef BLOCKMOVE
02f1175c 1562 int small_count;
1da177e4 1563#else
02f1175c 1564 char data;
1da177e4 1565#endif
ad39c300 1566 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1da177e4 1567
db05c3b1
JS		 1568 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1569 rx_put = readl(&buf_ctrl->rx_put);
1570 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1571 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
02f1175c
JS		 1572 if (rx_put >= rx_get)
1573 char_count = rx_put - rx_get;
1574 else
1575 char_count = rx_put - rx_get + rx_bufsize;
1da177e4 1576
02f1175c
JS		 1577 if (char_count) {
1578 info->last_active = jiffies;
1579 info->jiffies[1] = jiffies;
1da177e4
LT		 1580
1581#ifdef CY_ENABLE_MONITORING
02f1175c
JS		 1582 info->mon.int_count++;
1583 info->mon.char_count += char_count;
1584 if (char_count > info->mon.char_max)
1585 info->mon.char_max = char_count;
1586 info->mon.char_last = char_count;
1da177e4 1587#endif
02f1175c
JS		 1588 if (tty == 0) {
1589 /* flush received characters */
1590 new_rx_get = (new_rx_get + char_count) &
1591 (rx_bufsize - 1);
1592 info->rflush_count++;
1593 } else {
1da177e4 1594#ifdef BLOCKMOVE
02f1175c
JS		 1595 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1596 for performance, but because of buffer boundaries, there
1597 may be several steps to the operation */
1598 while (0 < (small_count = min_t(unsigned int,
1599 rx_bufsize - new_rx_get,
1600 min_t(unsigned int, TTY_FLIPBUF_SIZE -
1601 tty->flip.count, char_count)))){
1602 memcpy_fromio(tty->flip.char_buf_ptr,
1603 (char *)(cinfo->base_addr + rx_bufaddr +
1604 new_rx_get),
1605 small_count);
1606
1607 tty->flip.char_buf_ptr += small_count;
1608 memset(tty->flip.flag_buf_ptr, TTY_NORMAL,
1609 small_count);
1610 tty->flip.flag_buf_ptr += small_count;
1611 new_rx_get = (new_rx_get + small_count) &
1612 (rx_bufsize - 1);
1613 char_count -= small_count;
1614 info->icount.rx += small_count;
1615 info->idle_stats.recv_bytes += small_count;
1616 tty->flip.count += small_count;
1617 }
1da177e4 1618#else
02f1175c
JS		 1619 len = tty_buffer_request_room(tty, char_count);
1620 while (len--) {
db05c3b1 1621 data = readb(cinfo->base_addr + rx_bufaddr +
02f1175c
JS		 1622 new_rx_get);
1623 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1624 tty_insert_flip_char(tty, data, TTY_NORMAL);
1625 info->idle_stats.recv_bytes++;
1626 info->icount.rx++;
1627 }
1da177e4
LT		 1628#endif
1629#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1630 /* Recalculate the number of chars in the RX buffer and issue
1631 a cmd in case it's higher than the RX high water mark */
db05c3b1 1632 rx_put = readl(&buf_ctrl->rx_put);
02f1175c
JS		 1633 if (rx_put >= rx_get)
1634 char_count = rx_put - rx_get;
1635 else
1636 char_count = rx_put - rx_get + rx_bufsize;
db05c3b1 1637 if (char_count >= (int)readl(&buf_ctrl->rx_threshold)) {
02f1175c
JS		 1638 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1639 }
1da177e4 1640#endif
02f1175c
JS		 1641 info->idle_stats.recv_idle = jiffies;
1642 tty_schedule_flip(tty);
1643 }
1644 /* Update rx_get */
1645 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1da177e4 1646 }
1da177e4
LT		 1647}
1648
1649static void
ad39c300
JS		 1650cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1651 struct BUF_CTRL __iomem *buf_ctrl)
1da177e4 1652{
02f1175c
JS		 1653 struct cyclades_card *cinfo = &cy_card[info->card];
1654 struct tty_struct *tty = info->tty;
1655 char data;
ad39c300 1656 int char_count;
1da177e4 1657#ifdef BLOCKMOVE
02f1175c 1658 int small_count;
1da177e4 1659#endif
ad39c300 1660 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1da177e4 1661
02f1175c
JS		 1662 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1663 return;
1da177e4 1664
db05c3b1
JS		 1665 tx_get = readl(&buf_ctrl->tx_get);
1666 tx_put = readl(&buf_ctrl->tx_put);
1667 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1668 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
02f1175c
JS		 1669 if (tx_put >= tx_get)
1670 char_count = tx_get - tx_put - 1 + tx_bufsize;
1671 else
1672 char_count = tx_get - tx_put - 1;
1da177e4 1673
02f1175c 1674 if (char_count) {
1da177e4 1675
02f1175c
JS		 1676 if (tty == 0) {
1677 goto ztxdone;
1678 }
1da177e4 1679
02f1175c
JS		 1680 if (info->x_char) { /* send special char */
1681 data = info->x_char;
1da177e4 1682
02f1175c
JS		 1683 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1684 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1685 info->x_char = 0;
1686 char_count--;
1687 info->icount.tx++;
1688 info->last_active = jiffies;
1689 info->jiffies[2] = jiffies;
1690 }
1da177e4 1691#ifdef BLOCKMOVE
02f1175c
JS		 1692 while (0 < (small_count = min_t(unsigned int,
1693 tx_bufsize - tx_put, min_t(unsigned int,
1694 (SERIAL_XMIT_SIZE - info->xmit_tail),
1695 min_t(unsigned int, info->xmit_cnt,
1696 char_count))))) {
1697
1698 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1699 tx_put),
1700 &info->xmit_buf[info->xmit_tail],
1701 small_count);
1702
1703 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1704 char_count -= small_count;
1705 info->icount.tx += small_count;
1706 info->xmit_cnt -= small_count;
1707 info->xmit_tail = (info->xmit_tail + small_count) &
1708 (SERIAL_XMIT_SIZE - 1);
1709 info->last_active = jiffies;
1710 info->jiffies[2] = jiffies;
1711 }
1da177e4 1712#else
02f1175c
JS		 1713 while (info->xmit_cnt && char_count) {
1714 data = info->xmit_buf[info->xmit_tail];
1715 info->xmit_cnt--;
1716 info->xmit_tail = (info->xmit_tail + 1) &
1717 (SERIAL_XMIT_SIZE - 1);
1718
1719 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1720 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1721 char_count--;
1722 info->icount.tx++;
1723 info->last_active = jiffies;
1724 info->jiffies[2] = jiffies;
1725 }
1da177e4 1726#endif
02f1175c
JS		 1727ztxdone:
1728 if (info->xmit_cnt < WAKEUP_CHARS) {
1729 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1730 }
1731 /* Update tx_put */
1732 cy_writel(&buf_ctrl->tx_put, tx_put);
1da177e4 1733 }
1da177e4
LT		 1734}
1735
02f1175c 1736static void cyz_handle_cmd(struct cyclades_card *cinfo)
1da177e4 1737{
02f1175c
JS		 1738 struct tty_struct *tty;
1739 struct cyclades_port *info;
ad39c300
JS		 1740 static struct FIRM_ID __iomem *firm_id;
1741 static struct ZFW_CTRL __iomem *zfw_ctrl;
1742 static struct BOARD_CTRL __iomem *board_ctrl;
1743 static struct CH_CTRL __iomem *ch_ctrl;
1744 static struct BUF_CTRL __iomem *buf_ctrl;
1a86b5e3
KK		 1745 __u32 channel;
1746 __u8 cmd;
1747 __u32 param;
1748 __u32 hw_ver, fw_ver;
02f1175c
JS		 1749 int special_count;
1750 int delta_count;
1751
1752 firm_id = cinfo->base_addr + ID_ADDRESS;
db05c3b1 1753 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 1754 board_ctrl = &zfw_ctrl->board_ctrl;
db05c3b1
JS		 1755 fw_ver = readl(&board_ctrl->fw_version);
1756 hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
02f1175c
JS		 1757 mail_box_0);
1758
1759 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1760 special_count = 0;
1761 delta_count = 0;
1762 info = &cy_port[channel + cinfo->first_line];
1763 if ((tty = info->tty) == 0) {
1764 continue;
1da177e4 1765 }
02f1175c
JS		 1766 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1767 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1768
1769 switch (cmd) {
1770 case C_CM_PR_ERROR:
1771 tty_insert_flip_char(tty, 0, TTY_PARITY);
1772 info->icount.rx++;
1773 special_count++;
1774 break;
1775 case C_CM_FR_ERROR:
1776 tty_insert_flip_char(tty, 0, TTY_FRAME);
1777 info->icount.rx++;
1778 special_count++;
1779 break;
1780 case C_CM_RXBRK:
1781 tty_insert_flip_char(tty, 0, TTY_BREAK);
1782 info->icount.rx++;
1783 special_count++;
1784 break;
1785 case C_CM_MDCD:
1786 info->icount.dcd++;
1787 delta_count++;
1788 if (info->flags & ASYNC_CHECK_CD) {
1789 if ((fw_ver > 241 ? ((u_long) param) :
db05c3b1 1790 readl(&ch_ctrl->rs_status)) &
02f1175c
JS		 1791 C_RS_DCD) {
1792 cy_sched_event(info,
1793 Cy_EVENT_OPEN_WAKEUP);
1794 } else {
1795 cy_sched_event(info, Cy_EVENT_HANGUP);
1796 }
1797 }
1798 break;
1799 case C_CM_MCTS:
1800 info->icount.cts++;
1801 delta_count++;
1802 break;
1803 case C_CM_MRI:
1804 info->icount.rng++;
1805 delta_count++;
1806 break;
1807 case C_CM_MDSR:
1808 info->icount.dsr++;
1809 delta_count++;
1810 break;
1da177e4 1811#ifdef Z_WAKE
02f1175c
JS		 1812 case C_CM_IOCTLW:
1813 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1814 break;
1da177e4
LT		 1815#endif
1816#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1817 case C_CM_RXHIWM:
1818 case C_CM_RXNNDT:
1819 case C_CM_INTBACK2:
1820 /* Reception Interrupt */
1da177e4 1821#ifdef CY_DEBUG_INTERRUPTS
02f1175c
JS		 1822 printk("cyz_interrupt: rcvd intr, card %d, "
1823 "port %ld\n\r", info->card, channel);
1da177e4 1824#endif
02f1175c
JS		 1825 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1826 break;
1827 case C_CM_TXBEMPTY:
1828 case C_CM_TXLOWWM:
1829 case C_CM_INTBACK:
1830 /* Transmission Interrupt */
1da177e4 1831#ifdef CY_DEBUG_INTERRUPTS
02f1175c
JS		 1832 printk("cyz_interrupt: xmit intr, card %d, "
1833 "port %ld\n\r", info->card, channel);
1da177e4 1834#endif
02f1175c
JS		 1835 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1836 break;
1837#endif /* CONFIG_CYZ_INTR */
1838 case C_CM_FATAL:
1839 /* should do something with this !!! */
1840 break;
1841 default:
1842 break;
1843 }
1844 if (delta_count)
1845 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1846 if (special_count)
1847 tty_schedule_flip(tty);
1da177e4 1848 }
1da177e4
LT		 1849}
1850
1851#ifdef CONFIG_CYZ_INTR
02f1175c 1852static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1da177e4 1853{
02f1175c 1854 struct cyclades_card *cinfo;
1da177e4 1855
02f1175c 1856 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1da177e4 1857#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1858 printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
1da177e4 1859#endif
02f1175c
JS		 1860 return IRQ_NONE; /* spurious interrupt */
1861 }
1da177e4 1862
02f1175c 1863 if (!ISZLOADED(*cinfo)) {
1da177e4 1864#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1865 printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq);
1da177e4 1866#endif
02f1175c
JS		 1867 return IRQ_NONE;
1868 }
1da177e4 1869
02f1175c
JS		 1870 /* Handle the interrupts */
1871 cyz_handle_cmd(cinfo);
1da177e4 1872
02f1175c
JS		 1873 return IRQ_HANDLED;
1874} /* cyz_interrupt */
1da177e4 1875
02f1175c 1876static void cyz_rx_restart(unsigned long arg)
1da177e4 1877{
02f1175c
JS		 1878 struct cyclades_port *info = (struct cyclades_port *)arg;
1879 int retval;
1880 int card = info->card;
1a86b5e3 1881 __u32 channel = (info->line) - (cy_card[card].first_line);
02f1175c
JS		 1882 unsigned long flags;
1883
1884 CY_LOCK(info, flags);
1885 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
1886 if (retval != 0) {
1887 printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1888 info->line, retval);
1889 }
1890 cyz_rx_full_timer[info->line].function = NULL;
1891 CY_UNLOCK(info, flags);
1da177e4
LT		 1892}
1893
02f1175c 1894#else /* CONFIG_CYZ_INTR */
1da177e4 1895
02f1175c 1896static void cyz_poll(unsigned long arg)
1da177e4 1897{
02f1175c
JS		 1898 struct cyclades_card *cinfo;
1899 struct cyclades_port *info;
1900 struct tty_struct *tty;
ad39c300
JS		 1901 static struct FIRM_ID *firm_id;
1902 static struct ZFW_CTRL *zfw_ctrl;
1903 static struct BOARD_CTRL *board_ctrl;
1904 static struct CH_CTRL *ch_ctrl;
1905 static struct BUF_CTRL *buf_ctrl;
b7050906 1906 unsigned long expires = jiffies + HZ;
02f1175c 1907 int card, port;
1da177e4 1908
02f1175c
JS		 1909 for (card = 0; card < NR_CARDS; card++) {
1910 cinfo = &cy_card[card];
1911
1912 if (!IS_CYC_Z(*cinfo))
1913 continue;
1914 if (!ISZLOADED(*cinfo))
1915 continue;
1916
1917 firm_id = cinfo->base_addr + ID_ADDRESS;
1918 zfw_ctrl = cinfo->base_addr +
db05c3b1 1919 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 1920 board_ctrl = &(zfw_ctrl->board_ctrl);
1da177e4
LT		 1921
1922 /* Skip first polling cycle to avoid racing conditions with the FW */
02f1175c 1923 if (!cinfo->intr_enabled) {
db05c3b1 1924 cinfo->nports = (int)readl(&board_ctrl->n_channel);
02f1175c
JS		 1925 cinfo->intr_enabled = 1;
1926 continue;
1927 }
1da177e4 1928
02f1175c 1929 cyz_handle_cmd(cinfo);
1da177e4 1930
02f1175c
JS		 1931 for (port = 0; port < cinfo->nports; port++) {
1932 info = &cy_port[port + cinfo->first_line];
1933 tty = info->tty;
1934 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1935 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1da177e4 1936
02f1175c
JS		 1937 if (!info->throttle)
1938 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1939 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1940 }
1941 /* poll every 'cyz_polling_cycle' period */
b7050906 1942 expires = jiffies + cyz_polling_cycle;
1da177e4 1943 }
b7050906 1944 mod_timer(&cyz_timerlist, expires);
02f1175c 1945} /* cyz_poll */
1da177e4 1946
02f1175c 1947#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 1948
1949/********** End of block of Cyclades-Z specific code *********/
1950/***********************************************************/
1951
1da177e4
LT		 1952/* This is called whenever a port becomes active;
1953 interrupts are enabled and DTR & RTS are turned on.
1954 */
02f1175c 1955static int startup(struct cyclades_port *info)
1da177e4 1956{
02f1175c
JS		 1957 unsigned long flags;
1958 int retval = 0;
1959 void __iomem *base_addr;
1960 int card, chip, channel, index;
1961 unsigned long page;
1da177e4 1962
02f1175c
JS		 1963 card = info->card;
1964 channel = (info->line) - (cy_card[card].first_line);
1da177e4 1965
02f1175c
JS		 1966 page = get_zeroed_page(GFP_KERNEL);
1967 if (!page)
1968 return -ENOMEM;
1da177e4 1969
02f1175c 1970 CY_LOCK(info, flags);
1da177e4 1971
02f1175c
JS		 1972 if (info->flags & ASYNC_INITIALIZED) {
1973 free_page(page);
1974 goto errout;
1975 }
1da177e4 1976
02f1175c
JS		 1977 if (!info->type) {
1978 if (info->tty) {
1979 set_bit(TTY_IO_ERROR, &info->tty->flags);
1980 }
1981 free_page(page);
1982 goto errout;
1983 }
1da177e4 1984
02f1175c
JS		 1985 if (info->xmit_buf)
1986 free_page(page);
1987 else
1988 info->xmit_buf = (unsigned char *)page;
1da177e4 1989
02f1175c 1990 CY_UNLOCK(info, flags);
1da177e4 1991
02f1175c 1992 set_line_char(info);
1da177e4 1993
02f1175c
JS		 1994 if (!IS_CYC_Z(cy_card[card])) {
1995 chip = channel >> 2;
1996 channel &= 0x03;
1997 index = cy_card[card].bus_index;
1998 base_addr = cy_card[card].base_addr +
1999 (cy_chip_offset[chip] << index);
1da177e4
LT		 2000
2001#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2002 printk("cyc startup card %d, chip %d, channel %d, "
2003 "base_addr %lx\n",
2004 card, chip, channel, (long)base_addr);
2005 /**/
1da177e4 2006#endif
02f1175c 2007 CY_LOCK(info, flags);
1da177e4 2008
02f1175c 2009 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1da177e4 2010
02f1175c
JS		 2011 cy_writeb(base_addr + (CyRTPR << index),
2012 (info->default_timeout ? info->default_timeout : 0x02));
2013 /* 10ms rx timeout */
1da177e4 2014
02f1175c
JS		 2015 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
2016 index);
1da177e4 2017
02f1175c
JS		 2018 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2019 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
2020 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1da177e4
LT		 2021
2022#ifdef CY_DEBUG_DTR
02f1175c
JS		 2023 printk("cyc:startup raising DTR\n");
2024 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 2025 readb(base_addr + (CyMSVR1 << index)),
2026 readb(base_addr + (CyMSVR2 << index)));
1da177e4
LT		 2027#endif
2028
02f1175c 2029 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2030 readb(base_addr + (CySRER << index)) | CyRxData);
02f1175c 2031 info->flags |= ASYNC_INITIALIZED;
1da177e4 2032
02f1175c
JS		 2033 if (info->tty) {
2034 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2035 }
2036 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2037 info->breakon = info->breakoff = 0;
2038 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2039 info->idle_stats.in_use =
2040 info->idle_stats.recv_idle =
2041 info->idle_stats.xmit_idle = jiffies;
1da177e4 2042
02f1175c 2043 CY_UNLOCK(info, flags);
1da177e4 2044
02f1175c
JS		 2045 } else {
2046 struct FIRM_ID __iomem *firm_id;
2047 struct ZFW_CTRL __iomem *zfw_ctrl;
2048 struct BOARD_CTRL __iomem *board_ctrl;
2049 struct CH_CTRL __iomem *ch_ctrl;
2050 int retval;
1da177e4 2051
02f1175c 2052 base_addr = cy_card[card].base_addr;
1da177e4 2053
02f1175c
JS		 2054 firm_id = base_addr + ID_ADDRESS;
2055 if (!ISZLOADED(cy_card[card])) {
2056 return -ENODEV;
2057 }
1da177e4 2058
02f1175c 2059 zfw_ctrl = cy_card[card].base_addr +
db05c3b1 2060 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2061 board_ctrl = &zfw_ctrl->board_ctrl;
2062 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4
LT		 2063
2064#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2065 printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
2066 card, channel, (long)base_addr);
2067 /**/
1da177e4 2068#endif
02f1175c 2069 CY_LOCK(info, flags);
1da177e4 2070
02f1175c 2071 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1da177e4
LT		 2072#ifdef Z_WAKE
2073#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 2074 cy_writel(&ch_ctrl[channel].intr_enable,
2075 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2076 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1da177e4 2077#else
02f1175c
JS		 2078 cy_writel(&ch_ctrl[channel].intr_enable,
2079 C_IN_IOCTLW | C_IN_MDCD);
2080#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 2081#else
2082#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 2083 cy_writel(&ch_ctrl[channel].intr_enable,
2084 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2085 C_IN_RXNNDT | C_IN_MDCD);
1da177e4 2086#else
02f1175c
JS		 2087 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2088#endif /* CONFIG_CYZ_INTR */
2089#endif /* Z_WAKE */
2090
2091 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
2092 if (retval != 0) {
2093 printk("cyc:startup(1) retval on ttyC%d was %x\n",
2094 info->line, retval);
2095 }
1da177e4 2096
02f1175c
JS		 2097 /* Flush RX buffers before raising DTR and RTS */
2098 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX,
2099 0L);
2100 if (retval != 0) {
2101 printk("cyc:startup(2) retval on ttyC%d was %x\n",
2102 info->line, retval);
2103 }
1da177e4 2104
02f1175c
JS		 2105 /* set timeout !!! */
2106 /* set RTS and DTR !!! */
2107 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1 2108 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
02f1175c
JS		 2109 C_RS_DTR);
2110 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2111 C_CM_IOCTLM, 0L);
2112 if (retval != 0) {
2113 printk("cyc:startup(3) retval on ttyC%d was %x\n",
2114 info->line, retval);
2115 }
1da177e4 2116#ifdef CY_DEBUG_DTR
02f1175c 2117 printk("cyc:startup raising Z DTR\n");
1da177e4
LT		 2118#endif
2119
02f1175c
JS		 2120 /* enable send, recv, modem !!! */
2121
2122 info->flags |= ASYNC_INITIALIZED;
2123 if (info->tty) {
2124 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2125 }
2126 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2127 info->breakon = info->breakoff = 0;
2128 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2129 info->idle_stats.in_use =
2130 info->idle_stats.recv_idle =
2131 info->idle_stats.xmit_idle = jiffies;
1da177e4 2132
02f1175c 2133 CY_UNLOCK(info, flags);
1da177e4 2134 }
1da177e4
LT		 2135
2136#ifdef CY_DEBUG_OPEN
2137 printk(" cyc startup done\n");
2138#endif
2139 return 0;
2140
2141errout:
2142 CY_UNLOCK(info, flags);
2143 return retval;
02f1175c 2144} /* startup */
1da177e4 2145
02f1175c 2146static void start_xmit(struct cyclades_port *info)
1da177e4 2147{
02f1175c
JS		 2148 unsigned long flags;
2149 void __iomem *base_addr;
2150 int card, chip, channel, index;
1da177e4 2151
02f1175c
JS		 2152 card = info->card;
2153 channel = (info->line) - (cy_card[card].first_line);
2154 if (!IS_CYC_Z(cy_card[card])) {
2155 chip = channel >> 2;
2156 channel &= 0x03;
2157 index = cy_card[card].bus_index;
2158 base_addr = cy_card[card].base_addr +
2159 (cy_chip_offset[chip] << index);
2160
2161 CY_LOCK(info, flags);
2162 cy_writeb(base_addr + (CyCAR << index), channel);
2163 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2164 readb(base_addr + (CySRER << index)) | CyTxRdy);
02f1175c
JS		 2165 CY_UNLOCK(info, flags);
2166 } else {
1da177e4 2167#ifdef CONFIG_CYZ_INTR
02f1175c 2168 int retval;
1da177e4 2169
02f1175c
JS		 2170 CY_LOCK(info, flags);
2171 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK,
2172 0L);
2173 if (retval != 0) {
2174 printk("cyc:start_xmit retval on ttyC%d was %x\n",
2175 info->line, retval);
2176 }
2177 CY_UNLOCK(info, flags);
2178#else /* CONFIG_CYZ_INTR */
2179 /* Don't have to do anything at this time */
2180#endif /* CONFIG_CYZ_INTR */
2181 }
2182} /* start_xmit */
1da177e4
LT		 2183
2184/*
2185 * This routine shuts down a serial port; interrupts are disabled,
2186 * and DTR is dropped if the hangup on close termio flag is on.
2187 */
02f1175c 2188static void shutdown(struct cyclades_port *info)
1da177e4 2189{
02f1175c
JS		 2190 unsigned long flags;
2191 void __iomem *base_addr;
2192 int card, chip, channel, index;
2193
2194 if (!(info->flags & ASYNC_INITIALIZED)) {
2195 return;
2196 }
2197
2198 card = info->card;
2199 channel = info->line - cy_card[card].first_line;
2200 if (!IS_CYC_Z(cy_card[card])) {
2201 chip = channel >> 2;
2202 channel &= 0x03;
2203 index = cy_card[card].bus_index;
2204 base_addr = cy_card[card].base_addr +
2205 (cy_chip_offset[chip] << index);
1da177e4
LT		 2206
2207#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2208 printk("cyc shutdown Y card %d, chip %d, channel %d, "
2209 "base_addr %lx\n",
2210 card, chip, channel, (long)base_addr);
1da177e4
LT		 2211#endif
2212
02f1175c
JS		 2213 CY_LOCK(info, flags);
2214
2215 /* Clear delta_msr_wait queue to avoid mem leaks. */
2216 wake_up_interruptible(&info->delta_msr_wait);
1da177e4 2217
02f1175c
JS		 2218 if (info->xmit_buf) {
2219 unsigned char *temp;
2220 temp = info->xmit_buf;
2221 info->xmit_buf = NULL;
2222 free_page((unsigned long)temp);
2223 }
2224 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2225 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2226 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2227 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
1da177e4 2228#ifdef CY_DEBUG_DTR
02f1175c
JS		 2229 printk("cyc shutdown dropping DTR\n");
2230 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 2231 readb(base_addr + (CyMSVR1 << index)),
2232 readb(base_addr + (CyMSVR2 << index)));
1da177e4 2233#endif
02f1175c
JS		 2234 }
2235 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2236 /* it may be appropriate to clear _XMIT at
2237 some later date (after testing)!!! */
2238
2239 if (info->tty) {
2240 set_bit(TTY_IO_ERROR, &info->tty->flags);
2241 }
2242 info->flags &= ~ASYNC_INITIALIZED;
2243 CY_UNLOCK(info, flags);
2244 } else {
2245 struct FIRM_ID __iomem *firm_id;
2246 struct ZFW_CTRL __iomem *zfw_ctrl;
2247 struct BOARD_CTRL __iomem *board_ctrl;
2248 struct CH_CTRL __iomem *ch_ctrl;
2249 int retval;
2250
2251 base_addr = cy_card[card].base_addr;
1da177e4 2252#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2253 printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
2254 card, channel, (long)base_addr);
1da177e4
LT		 2255#endif
2256
02f1175c
JS		 2257 firm_id = base_addr + ID_ADDRESS;
2258 if (!ISZLOADED(cy_card[card])) {
2259 return;
2260 }
1da177e4 2261
02f1175c 2262 zfw_ctrl = cy_card[card].base_addr +
db05c3b1 2263 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2264 board_ctrl = &zfw_ctrl->board_ctrl;
2265 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4 2266
02f1175c 2267 CY_LOCK(info, flags);
1da177e4 2268
02f1175c
JS		 2269 if (info->xmit_buf) {
2270 unsigned char *temp;
2271 temp = info->xmit_buf;
2272 info->xmit_buf = NULL;
2273 free_page((unsigned long)temp);
1da177e4 2274 }
02f1175c
JS		 2275
2276 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2277 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1 2278 (__u32)(readl(&ch_ctrl[channel].rs_control) &
02f1175c
JS		 2279 ~(C_RS_RTS | C_RS_DTR)));
2280 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2281 C_CM_IOCTLM, 0L);
2282 if (retval != 0) {
2283 printk("cyc:shutdown retval on ttyC%d was %x\n",
2284 info->line, retval);
2285 }
1da177e4 2286#ifdef CY_DEBUG_DTR
02f1175c 2287 printk("cyc:shutdown dropping Z DTR\n");
1da177e4 2288#endif
02f1175c 2289 }
1da177e4 2290
02f1175c
JS		 2291 if (info->tty) {
2292 set_bit(TTY_IO_ERROR, &info->tty->flags);
2293 }
2294 info->flags &= ~ASYNC_INITIALIZED;
2295
2296 CY_UNLOCK(info, flags);
2297 }
1da177e4
LT		 2298
2299#ifdef CY_DEBUG_OPEN
02f1175c 2300 printk(" cyc shutdown done\n");
1da177e4 2301#endif
02f1175c 2302} /* shutdown */
1da177e4
LT		 2303
2304/*
2305 * ------------------------------------------------------------
2306 * cy_open() and friends
2307 * ------------------------------------------------------------
2308 */
2309
2310static int
02f1175c
JS		 2311block_til_ready(struct tty_struct *tty, struct file *filp,
2312 struct cyclades_port *info)
1da177e4 2313{
02f1175c
JS		 2314 DECLARE_WAITQUEUE(wait, current);
2315 struct cyclades_card *cinfo;
2316 unsigned long flags;
2317 int chip, channel, index;
2318 int retval;
2319 void __iomem *base_addr;
2320
2321 cinfo = &cy_card[info->card];
2322 channel = info->line - cinfo->first_line;
2323
2324 /*
2325 * If the device is in the middle of being closed, then block
2326 * until it's done, and then try again.
2327 */
2328 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2329 if (info->flags & ASYNC_CLOSING) {
2330 interruptible_sleep_on(&info->close_wait);
2331 }
096dcfce 2332 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
1da177e4 2333 }
02f1175c
JS		 2334
2335 /*
2336 * If non-blocking mode is set, then make the check up front
2337 * and then exit.
2338 */
2339 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2340 info->flags |= ASYNC_NORMAL_ACTIVE;
2341 return 0;
2342 }
2343
2344 /*
2345 * Block waiting for the carrier detect and the line to become
2346 * free (i.e., not in use by the callout). While we are in
2347 * this loop, info->count is dropped by one, so that
2348 * cy_close() knows when to free things. We restore it upon
2349 * exit, either normal or abnormal.
2350 */
2351 retval = 0;
2352 add_wait_queue(&info->open_wait, &wait);
1da177e4 2353#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2354 printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
2355 info->line, info->count);
2356 /**/
1da177e4 2357#endif
02f1175c
JS		 2358 CY_LOCK(info, flags);
2359 if (!tty_hung_up_p(filp))
2360 info->count--;
2361 CY_UNLOCK(info, flags);
1da177e4 2362#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2363 printk("cyc block_til_ready: (%d): decrementing count to %d\n",
2364 current->pid, info->count);
1da177e4 2365#endif
02f1175c
JS		 2366 info->blocked_open++;
2367
2368 if (!IS_CYC_Z(*cinfo)) {
2369 chip = channel >> 2;
2370 channel &= 0x03;
2371 index = cinfo->bus_index;
2372 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2373
2374 while (1) {
2375 CY_LOCK(info, flags);
2376 if ((tty->termios->c_cflag & CBAUD)) {
2377 cy_writeb(base_addr + (CyCAR << index),
2378 (u_char) channel);
2379 cy_writeb(base_addr + (CyMSVR1 << index),
2380 CyRTS);
2381 cy_writeb(base_addr + (CyMSVR2 << index),
2382 CyDTR);
1da177e4 2383#ifdef CY_DEBUG_DTR
02f1175c
JS		 2384 printk("cyc:block_til_ready raising DTR\n");
2385 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 2386 readb(base_addr + (CyMSVR1 << index)),
2387 readb(base_addr + (CyMSVR2 << index)));
1da177e4 2388#endif
02f1175c
JS		 2389 }
2390 CY_UNLOCK(info, flags);
1da177e4 2391
02f1175c
JS		 2392 set_current_state(TASK_INTERRUPTIBLE);
2393 if (tty_hung_up_p(filp) ||
2394 !(info->flags & ASYNC_INITIALIZED)) {
2395 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2396 -EAGAIN : -ERESTARTSYS);
2397 break;
2398 }
1da177e4 2399
02f1175c
JS		 2400 CY_LOCK(info, flags);
2401 cy_writeb(base_addr + (CyCAR << index),
2402 (u_char) channel);
2403 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
db05c3b1 2404 (readb(base_addr +
02f1175c
JS		 2405 (CyMSVR1 << index)) & CyDCD))) {
2406 CY_UNLOCK(info, flags);
2407 break;
2408 }
1da177e4 2409 CY_UNLOCK(info, flags);
1da177e4 2410
02f1175c
JS		 2411 if (signal_pending(current)) {
2412 retval = -ERESTARTSYS;
2413 break;
2414 }
1da177e4 2415#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2416 printk("cyc block_til_ready blocking: ttyC%d, "
2417 "count = %d\n",
2418 info->line, info->count);
2419 /**/
1da177e4 2420#endif
02f1175c 2421 schedule();
1da177e4 2422 }
02f1175c
JS		 2423 } else {
2424 struct FIRM_ID __iomem *firm_id;
2425 struct ZFW_CTRL __iomem *zfw_ctrl;
2426 struct BOARD_CTRL __iomem *board_ctrl;
2427 struct CH_CTRL __iomem *ch_ctrl;
2428 int retval;
2429
2430 base_addr = cinfo->base_addr;
2431 firm_id = base_addr + ID_ADDRESS;
2432 if (!ISZLOADED(*cinfo)) {
cc0a8fbb 2433 __set_current_state(TASK_RUNNING);
02f1175c
JS		 2434 remove_wait_queue(&info->open_wait, &wait);
2435 return -EINVAL;
2436 }
2437
db05c3b1 2438 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
02f1175c
JS		 2439 board_ctrl = &zfw_ctrl->board_ctrl;
2440 ch_ctrl = zfw_ctrl->ch_ctrl;
2441
2442 while (1) {
2443 if ((tty->termios->c_cflag & CBAUD)) {
2444 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 2445 readl(&ch_ctrl[channel].rs_control) |
2446 C_RS_RTS | C_RS_DTR);
02f1175c 2447 retval = cyz_issue_cmd(&cy_card[info->card],
db05c3b1 2448 channel, C_CM_IOCTLM, 0L);
02f1175c
JS		 2449 if (retval != 0) {
2450 printk("cyc:block_til_ready retval on "
2451 "ttyC%d was %x\n",
2452 info->line, retval);
2453 }
1da177e4 2454#ifdef CY_DEBUG_DTR
02f1175c 2455 printk("cyc:block_til_ready raising Z DTR\n");
1da177e4 2456#endif
02f1175c 2457 }
1da177e4 2458
02f1175c
JS		 2459 set_current_state(TASK_INTERRUPTIBLE);
2460 if (tty_hung_up_p(filp) ||
2461 !(info->flags & ASYNC_INITIALIZED)) {
2462 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2463 -EAGAIN : -ERESTARTSYS);
2464 break;
2465 }
2466 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
db05c3b1 2467 (readl(&ch_ctrl[channel].rs_status) &
02f1175c
JS		 2468 C_RS_DCD))) {
2469 break;
2470 }
2471 if (signal_pending(current)) {
2472 retval = -ERESTARTSYS;
2473 break;
2474 }
1da177e4 2475#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2476 printk("cyc block_til_ready blocking: ttyC%d, "
2477 "count = %d\n",
2478 info->line, info->count);
2479 /**/
1da177e4 2480#endif
02f1175c
JS		 2481 schedule();
2482 }
1da177e4 2483 }
cc0a8fbb 2484 __set_current_state(TASK_RUNNING);
02f1175c
JS		 2485 remove_wait_queue(&info->open_wait, &wait);
2486 if (!tty_hung_up_p(filp)) {
2487 info->count++;
1da177e4 2488#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2489 printk("cyc:block_til_ready (%d): incrementing count to %d\n",
2490 current->pid, info->count);
1da177e4 2491#endif
02f1175c
JS		 2492 }
2493 info->blocked_open--;
1da177e4 2494#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2495 printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
2496 info->line, info->count);
2497 /**/
1da177e4 2498#endif
02f1175c
JS		 2499 if (retval)
2500 return retval;
2501 info->flags |= ASYNC_NORMAL_ACTIVE;
2502 return 0;
2503} /* block_til_ready */
1da177e4
LT		 2504
2505/*
2506 * This routine is called whenever a serial port is opened. It
2507 * performs the serial-specific initialization for the tty structure.
2508 */
02f1175c 2509static int cy_open(struct tty_struct *tty, struct file *filp)
1da177e4 2510{
02f1175c
JS		 2511 struct cyclades_port *info;
2512 int retval, line;
1da177e4 2513
02f1175c
JS		 2514 line = tty->index;
2515 if ((line < 0) || (NR_PORTS <= line)) {
2516 return -ENODEV;
2517 }
2518 info = &cy_port[line];
2519 if (info->line < 0) {
2520 return -ENODEV;
2521 }
1da177e4 2522
02f1175c
JS		 2523 /* If the card's firmware hasn't been loaded,
2524 treat it as absent from the system. This
2525 will make the user pay attention.
2526 */
2527 if (IS_CYC_Z(cy_card[info->card])) {
2528 struct cyclades_card *cinfo = &cy_card[info->card];
2529 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2530
2531 if (!ISZLOADED(*cinfo)) {
db05c3b1 2532 if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
02f1175c
JS		 2533 (cinfo->ctl_addr))->mail_box_0)) &&
2534 Z_FPGA_CHECK(*cinfo)) &&
db05c3b1 2535 (ZFIRM_HLT == readl(
02f1175c
JS		 2536 &firm_id->signature))) {
2537 printk("cyc:Cyclades-Z Error: you need an "
2538 "external power supply for this number "
2539 "of ports.\n\rFirmware halted.\r\n");
2540 } else {
2541 printk("cyc:Cyclades-Z firmware not yet "
2542 "loaded\n");
2543 }
2544 return -ENODEV;
2545 }
2546#ifdef CONFIG_CYZ_INTR
2547 else {
2548 /* In case this Z board is operating in interrupt mode, its
2549 interrupts should be enabled as soon as the first open
2550 happens to one of its ports. */
2551 if (!cinfo->intr_enabled) {
2552 struct ZFW_CTRL __iomem *zfw_ctrl;
2553 struct BOARD_CTRL __iomem *board_ctrl;
2554
2555 zfw_ctrl = cinfo->base_addr +
db05c3b1
JS		 2556 (readl(&firm_id->zfwctrl_addr) &
2557 0xfffff);
02f1175c
JS		 2558
2559 board_ctrl = &zfw_ctrl->board_ctrl;
2560
2561 /* Enable interrupts on the PLX chip */
2562 cy_writew(cinfo->ctl_addr + 0x68,
db05c3b1 2563 readw(cinfo->ctl_addr + 0x68) | 0x0900);
02f1175c
JS		 2564 /* Enable interrupts on the FW */
2565 retval = cyz_issue_cmd(cinfo, 0,
2566 C_CM_IRQ_ENBL, 0L);
2567 if (retval != 0) {
2568 printk("cyc:IRQ enable retval was %x\n",
2569 retval);
2570 }
2571 cinfo->nports =
db05c3b1 2572 (int)readl(&board_ctrl->n_channel);
02f1175c
JS		 2573 cinfo->intr_enabled = 1;
2574 }
1da177e4 2575 }
02f1175c
JS		 2576#endif /* CONFIG_CYZ_INTR */
2577 /* Make sure this Z port really exists in hardware */
2578 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2579 return -ENODEV;
1da177e4 2580 }
1da177e4 2581#ifdef CY_DEBUG_OTHER
02f1175c 2582 printk("cyc:cy_open ttyC%d\n", info->line); /* */
1da177e4 2583#endif
02f1175c
JS		 2584 tty->driver_data = info;
2585 info->tty = tty;
2586 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2587 return -ENODEV;
2588 }
1da177e4 2589#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2590 printk("cyc:cy_open ttyC%d, count = %d\n", info->line, info->count);
2591 /**/
1da177e4 2592#endif
02f1175c 2593 info->count++;
1da177e4 2594#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2595 printk("cyc:cy_open (%d): incrementing count to %d\n",
2596 current->pid, info->count);
1da177e4 2597#endif
1da177e4 2598
02f1175c
JS		 2599 /*
2600 * If the port is the middle of closing, bail out now
2601 */
2602 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2603 if (info->flags & ASYNC_CLOSING)
2604 interruptible_sleep_on(&info->close_wait);
096dcfce 2605 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
02f1175c 2606 }
1da177e4 2607
02f1175c
JS		 2608 /*
2609 * Start up serial port
2610 */
2611 retval = startup(info);
2612 if (retval) {
2613 return retval;
2614 }
1da177e4 2615
02f1175c
JS		 2616 retval = block_til_ready(tty, filp, info);
2617 if (retval) {
1da177e4 2618#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2619 printk("cyc:cy_open returning after block_til_ready with %d\n",
2620 retval);
1da177e4 2621#endif
02f1175c
JS		 2622 return retval;
2623 }
1da177e4 2624
02f1175c 2625 info->throttle = 0;
1da177e4 2626
02f1175c
JS		 2627#ifdef CY_DEBUG_OPEN
2628 printk(" cyc:cy_open done\n");
2629 /**/
2630#endif
2631 return 0;
2632} /* cy_open */
1da177e4
LT		 2633
2634/*
2635 * cy_wait_until_sent() --- wait until the transmitter is empty
2636 */
02f1175c 2637static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
1da177e4 2638{
cab9bdd1 2639 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 2640 void __iomem *base_addr;
2641 int card, chip, channel, index;
2642 unsigned long orig_jiffies;
2643 int char_time;
2644
2645 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2646 return;
2647
2648 if (info->xmit_fifo_size == 0)
2649 return; /* Just in case.... */
1da177e4 2650
02f1175c
JS		 2651 orig_jiffies = jiffies;
2652 /*
2653 * Set the check interval to be 1/5 of the estimated time to
2654 * send a single character, and make it at least 1. The check
2655 * interval should also be less than the timeout.
2656 *
2657 * Note: we have to use pretty tight timings here to satisfy
2658 * the NIST-PCTS.
2659 */
2660 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2661 char_time = char_time / 5;
2662 if (char_time <= 0)
2663 char_time = 1;
2664 if (timeout < 0)
2665 timeout = 0;
2666 if (timeout)
2667 char_time = min(char_time, timeout);
2668 /*
2669 * If the transmitter hasn't cleared in twice the approximate
2670 * amount of time to send the entire FIFO, it probably won't
2671 * ever clear. This assumes the UART isn't doing flow
2672 * control, which is currently the case. Hence, if it ever
2673 * takes longer than info->timeout, this is probably due to a
2674 * UART bug of some kind. So, we clamp the timeout parameter at
2675 * 2*info->timeout.
2676 */
2677 if (!timeout || timeout > 2 * info->timeout)
2678 timeout = 2 * info->timeout;
1da177e4 2679#ifdef CY_DEBUG_WAIT_UNTIL_SENT
02f1175c
JS		 2680 printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
2681 printk("jiff=%lu...", jiffies);
1da177e4 2682#endif
02f1175c
JS		 2683 card = info->card;
2684 channel = (info->line) - (cy_card[card].first_line);
2685 if (!IS_CYC_Z(cy_card[card])) {
2686 chip = channel >> 2;
2687 channel &= 0x03;
2688 index = cy_card[card].bus_index;
2689 base_addr =
2690 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
db05c3b1 2691 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
1da177e4 2692#ifdef CY_DEBUG_WAIT_UNTIL_SENT
02f1175c 2693 printk("Not clean (jiff=%lu)...", jiffies);
1da177e4 2694#endif
02f1175c
JS		 2695 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2696 break;
2697 if (timeout && time_after(jiffies, orig_jiffies +
2698 timeout))
2699 break;
2700 }
2701 } else {
096dcfce 2702 /* Nothing to do! */
1da177e4 2703 }
02f1175c
JS		 2704 /* Run one more char cycle */
2705 msleep_interruptible(jiffies_to_msecs(char_time * 5));
1da177e4 2706#ifdef CY_DEBUG_WAIT_UNTIL_SENT
02f1175c 2707 printk("Clean (jiff=%lu)...done\n", jiffies);
1da177e4
LT		 2708#endif
2709}
2710
2711/*
2712 * This routine is called when a particular tty device is closed.
2713 */
02f1175c 2714static void cy_close(struct tty_struct *tty, struct file *filp)
1da177e4 2715{
cab9bdd1 2716 struct cyclades_port *info = tty->driver_data;
02f1175c 2717 unsigned long flags;
1da177e4
LT		 2718
2719#ifdef CY_DEBUG_OTHER
02f1175c 2720 printk("cyc:cy_close ttyC%d\n", info->line);
1da177e4
LT		 2721#endif
2722
02f1175c
JS		 2723 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2724 return;
2725 }
1da177e4 2726
02f1175c
JS		 2727 CY_LOCK(info, flags);
2728 /* If the TTY is being hung up, nothing to do */
2729 if (tty_hung_up_p(filp)) {
2730 CY_UNLOCK(info, flags);
2731 return;
2732 }
1da177e4 2733#ifdef CY_DEBUG_OPEN
02f1175c 2734 printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
1da177e4 2735#endif
02f1175c
JS		 2736 if ((tty->count == 1) && (info->count != 1)) {
2737 /*
2738 * Uh, oh. tty->count is 1, which means that the tty
2739 * structure will be freed. Info->count should always
2740 * be one in these conditions. If it's greater than
2741 * one, we've got real problems, since it means the
2742 * serial port won't be shutdown.
2743 */
2744 printk("cyc:cy_close: bad serial port count; tty->count is 1, "
2745 "info->count is %d\n", info->count);
2746 info->count = 1;
2747 }
1da177e4 2748#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2749 printk("cyc:cy_close at (%d): decrementing count to %d\n",
2750 current->pid, info->count - 1);
1da177e4 2751#endif
02f1175c 2752 if (--info->count < 0) {
1da177e4 2753#ifdef CY_DEBUG_COUNT
02f1175c 2754 printk("cyc:cyc_close setting count to 0\n");
1da177e4 2755#endif
02f1175c 2756 info->count = 0;
1da177e4 2757 }
02f1175c
JS		 2758 if (info->count) {
2759 CY_UNLOCK(info, flags);
2760 return;
2761 }
2762 info->flags |= ASYNC_CLOSING;
1da177e4 2763
02f1175c
JS		 2764 /*
2765 * Now we wait for the transmit buffer to clear; and we notify
2766 * the line discipline to only process XON/XOFF characters.
2767 */
2768 tty->closing = 1;
2769 CY_UNLOCK(info, flags);
2770 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2771 tty_wait_until_sent(tty, info->closing_wait);
1da177e4 2772 }
02f1175c
JS		 2773 CY_LOCK(info, flags);
2774
2775 if (!IS_CYC_Z(cy_card[info->card])) {
2776 int channel = info->line - cy_card[info->card].first_line;
2777 int index = cy_card[info->card].bus_index;
2778 void __iomem *base_addr = cy_card[info->card].base_addr +
2779 (cy_chip_offset[channel >> 2] << index);
2780 /* Stop accepting input */
2781 channel &= 0x03;
2782 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2783 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2784 readb(base_addr + (CySRER << index)) & ~CyRxData);
02f1175c
JS		 2785 if (info->flags & ASYNC_INITIALIZED) {
2786 /* Waiting for on-board buffers to be empty before closing
2787 the port */
2788 CY_UNLOCK(info, flags);
2789 cy_wait_until_sent(tty, info->timeout);
2790 CY_LOCK(info, flags);
2791 }
2792 } else {
2793#ifdef Z_WAKE
2794 /* Waiting for on-board buffers to be empty before closing the port */
2795 void __iomem *base_addr = cy_card[info->card].base_addr;
2796 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2797 struct ZFW_CTRL __iomem *zfw_ctrl =
db05c3b1 2798 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2799 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2800 int channel = info->line - cy_card[info->card].first_line;
2801 int retval;
2802
db05c3b1 2803 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
02f1175c
JS		 2804 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2805 C_CM_IOCTLW, 0L);
2806 if (retval != 0) {
2807 printk("cyc:cy_close retval on ttyC%d was %x\n",
2808 info->line, retval);
2809 }
2810 CY_UNLOCK(info, flags);
2811 interruptible_sleep_on(&info->shutdown_wait);
2812 CY_LOCK(info, flags);
2813 }
1da177e4 2814#endif
02f1175c
JS		 2815 }
2816
1da177e4 2817 CY_UNLOCK(info, flags);
02f1175c
JS		 2818 shutdown(info);
2819 if (tty->driver->flush_buffer)
2820 tty->driver->flush_buffer(tty);
2821 tty_ldisc_flush(tty);
1da177e4 2822 CY_LOCK(info, flags);
02f1175c
JS		 2823
2824 tty->closing = 0;
2825 info->event = 0;
2826 info->tty = NULL;
2827 if (info->blocked_open) {
2828 CY_UNLOCK(info, flags);
2829 if (info->close_delay) {
2830 msleep_interruptible(jiffies_to_msecs
2831 (info->close_delay));
2832 }
2833 wake_up_interruptible(&info->open_wait);
2834 CY_LOCK(info, flags);
2835 }
2836 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2837 wake_up_interruptible(&info->close_wait);
1da177e4
LT		 2838
2839#ifdef CY_DEBUG_OTHER
02f1175c 2840 printk(" cyc:cy_close done\n");
1da177e4
LT		 2841#endif
2842
02f1175c 2843 CY_UNLOCK(info, flags);
02f1175c 2844} /* cy_close */
1da177e4
LT		 2845
2846/* This routine gets called when tty_write has put something into
2847 * the write_queue. The characters may come from user space or
2848 * kernel space.
2849 *
2850 * This routine will return the number of characters actually
2851 * accepted for writing.
2852 *
2853 * If the port is not already transmitting stuff, start it off by
2854 * enabling interrupts. The interrupt service routine will then
2855 * ensure that the characters are sent.
2856 * If the port is already active, there is no need to kick it.
2857 *
2858 */
02f1175c 2859static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1da177e4 2860{
cab9bdd1 2861 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 2862 unsigned long flags;
2863 int c, ret = 0;
1da177e4
LT		 2864
2865#ifdef CY_DEBUG_IO
02f1175c 2866 printk("cyc:cy_write ttyC%d\n", info->line); /* */
1da177e4
LT		 2867#endif
2868
02f1175c
JS		 2869 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2870 return 0;
2871 }
1da177e4 2872
02f1175c
JS		 2873 if (!info->xmit_buf)
2874 return 0;
1da177e4 2875
02f1175c
JS		 2876 CY_LOCK(info, flags);
2877 while (1) {
2878 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2879 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2880
2881 if (c <= 0)
2882 break;
2883
2884 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2885 info->xmit_head = (info->xmit_head + c) &
2886 (SERIAL_XMIT_SIZE - 1);
2887 info->xmit_cnt += c;
2888 buf += c;
2889 count -= c;
2890 ret += c;
2891 }
2892 CY_UNLOCK(info, flags);
2893
2894 info->idle_stats.xmit_bytes += ret;
2895 info->idle_stats.xmit_idle = jiffies;
2896
2897 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2898 start_xmit(info);
2899 }
2900 return ret;
2901} /* cy_write */
1da177e4
LT		 2902
2903/*
2904 * This routine is called by the kernel to write a single
2905 * character to the tty device. If the kernel uses this routine,
2906 * it must call the flush_chars() routine (if defined) when it is
2907 * done stuffing characters into the driver. If there is no room
2908 * in the queue, the character is ignored.
2909 */
02f1175c 2910static void cy_put_char(struct tty_struct *tty, unsigned char ch)
1da177e4 2911{
cab9bdd1 2912 struct cyclades_port *info = tty->driver_data;
02f1175c 2913 unsigned long flags;
1da177e4
LT		 2914
2915#ifdef CY_DEBUG_IO
02f1175c 2916 printk("cyc:cy_put_char ttyC%d\n", info->line);
1da177e4
LT		 2917#endif
2918
02f1175c
JS		 2919 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2920 return;
1da177e4 2921
02f1175c
JS		 2922 if (!info->xmit_buf)
2923 return;
1da177e4 2924
02f1175c 2925 CY_LOCK(info, flags);
90cc3018 2926 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
02f1175c
JS		 2927 CY_UNLOCK(info, flags);
2928 return;
2929 }
1da177e4 2930
02f1175c
JS		 2931 info->xmit_buf[info->xmit_head++] = ch;
2932 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2933 info->xmit_cnt++;
1da177e4
LT		 2934 info->idle_stats.xmit_bytes++;
2935 info->idle_stats.xmit_idle = jiffies;
02f1175c
JS		 2936 CY_UNLOCK(info, flags);
2937} /* cy_put_char */
1da177e4
LT		 2938
2939/*
2940 * This routine is called by the kernel after it has written a
2941 * series of characters to the tty device using put_char().
2942 */
02f1175c 2943static void cy_flush_chars(struct tty_struct *tty)
1da177e4 2944{
cab9bdd1 2945 struct cyclades_port *info = tty->driver_data;
02f1175c 2946
1da177e4 2947#ifdef CY_DEBUG_IO
02f1175c 2948 printk("cyc:cy_flush_chars ttyC%d\n", info->line); /* */
1da177e4
LT		 2949#endif
2950
02f1175c
JS		 2951 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2952 return;
1da177e4 2953
02f1175c
JS		 2954 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2955 !info->xmit_buf)
2956 return;
1da177e4 2957
02f1175c
JS		 2958 start_xmit(info);
2959} /* cy_flush_chars */
1da177e4
LT		 2960
2961/*
2962 * This routine returns the numbers of characters the tty driver
2963 * will accept for queuing to be written. This number is subject
2964 * to change as output buffers get emptied, or if the output flow
2965 * control is activated.
2966 */
02f1175c 2967static int cy_write_room(struct tty_struct *tty)
1da177e4 2968{
cab9bdd1 2969 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 2970 int ret;
2971
1da177e4 2972#ifdef CY_DEBUG_IO
02f1175c 2973 printk("cyc:cy_write_room ttyC%d\n", info->line); /* */
1da177e4
LT		 2974#endif
2975
02f1175c
JS		 2976 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2977 return 0;
2978 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2979 if (ret < 0)
2980 ret = 0;
2981 return ret;
2982} /* cy_write_room */
1da177e4 2983
02f1175c 2984static int cy_chars_in_buffer(struct tty_struct *tty)
1da177e4 2985{
cab9bdd1 2986 struct cyclades_port *info = tty->driver_data;
02f1175c 2987 int card, channel;
1da177e4 2988
02f1175c
JS		 2989 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2990 return 0;
2991
2992 card = info->card;
2993 channel = (info->line) - (cy_card[card].first_line);
1da177e4
LT		 2994
2995#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c
JS		 2996 if (!IS_CYC_Z(cy_card[card])) {
2997#endif /* Z_EXT_CHARS_IN_BUFFER */
1da177e4 2998#ifdef CY_DEBUG_IO
02f1175c 2999 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt); /* */
1da177e4 3000#endif
02f1175c 3001 return info->xmit_cnt;
1da177e4 3002#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c 3003 } else {
ad39c300
JS		 3004 static struct FIRM_ID *firm_id;
3005 static struct ZFW_CTRL *zfw_ctrl;
3006 static struct CH_CTRL *ch_ctrl;
3007 static struct BUF_CTRL *buf_ctrl;
02f1175c 3008 int char_count;
ad39c300 3009 __u32 tx_put, tx_get, tx_bufsize;
02f1175c
JS		 3010
3011 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3012 zfw_ctrl = cy_card[card].base_addr +
db05c3b1 3013 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3014 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3015 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3016
db05c3b1
JS		 3017 tx_get = readl(&buf_ctrl->tx_get);
3018 tx_put = readl(&buf_ctrl->tx_put);
3019 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
02f1175c
JS		 3020 if (tx_put >= tx_get)
3021 char_count = tx_put - tx_get;
3022 else
3023 char_count = tx_put - tx_get + tx_bufsize;
1da177e4 3024#ifdef CY_DEBUG_IO
02f1175c 3025 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt + char_count); /* */
1da177e4 3026#endif
096dcfce 3027 return info->xmit_cnt + char_count;
02f1175c
JS		 3028 }
3029#endif /* Z_EXT_CHARS_IN_BUFFER */
3030} /* cy_chars_in_buffer */
1da177e4
LT		 3031
3032/*
3033 * ------------------------------------------------------------
3034 * cy_ioctl() and friends
3035 * ------------------------------------------------------------
3036 */
3037
1a86b5e3 3038static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
1da177e4 3039{
02f1175c 3040 int co, co_val, bpr;
1a86b5e3 3041 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
02f1175c 3042 25000000);
1da177e4 3043
02f1175c
JS		 3044 if (baud == 0) {
3045 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3046 return;
3047 }
1da177e4 3048
02f1175c
JS		 3049 /* determine which prescaler to use */
3050 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3051 if (cy_clock / co_val / baud > 63)
3052 break;
3053 }
1da177e4 3054
02f1175c
JS		 3055 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3056 if (bpr > 255)
3057 bpr = 255;
1da177e4 3058
02f1175c
JS		 3059 info->tbpr = info->rbpr = bpr;
3060 info->tco = info->rco = co;
1da177e4
LT		 3061}
3062
3063/*
3064 * This routine finds or computes the various line characteristics.
3065 * It used to be called config_setup
3066 */
02f1175c 3067static void set_line_char(struct cyclades_port *info)
1da177e4 3068{
02f1175c
JS		 3069 unsigned long flags;
3070 void __iomem *base_addr;
3071 int card, chip, channel, index;
3072 unsigned cflag, iflag;
3073 unsigned short chip_number;
3074 int baud, baud_rate = 0;
3075 int i;
3076
3077 if (!info->tty || !info->tty->termios) {
3078 return;
1da177e4 3079 }
02f1175c
JS		 3080 if (info->line == -1) {
3081 return;
1da177e4 3082 }
02f1175c
JS		 3083 cflag = info->tty->termios->c_cflag;
3084 iflag = info->tty->termios->c_iflag;
1da177e4 3085
02f1175c
JS		 3086 /*
3087 * Set up the tty->alt_speed kludge
3088 */
3089 if (info->tty) {
3090 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3091 info->tty->alt_speed = 57600;
3092 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3093 info->tty->alt_speed = 115200;
3094 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3095 info->tty->alt_speed = 230400;
3096 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3097 info->tty->alt_speed = 460800;
1da177e4 3098 }
02f1175c
JS		 3099
3100 card = info->card;
3101 channel = (info->line) - (cy_card[card].first_line);
3102 chip_number = channel / 4;
3103
3104 if (!IS_CYC_Z(cy_card[card])) {
3105
3106 index = cy_card[card].bus_index;
3107
3108 /* baud rate */
3109 baud = tty_get_baud_rate(info->tty);
3110 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3111 ASYNC_SPD_CUST) {
3112 if (info->custom_divisor)
3113 baud_rate = info->baud / info->custom_divisor;
3114 else
3115 baud_rate = info->baud;
3116 } else if (baud > CD1400_MAX_SPEED) {
3117 baud = CD1400_MAX_SPEED;
3118 }
3119 /* find the baud index */
3120 for (i = 0; i < 20; i++) {
3121 if (baud == baud_table[i]) {
3122 break;
3123 }
3124 }
3125 if (i == 20) {
3126 i = 19; /* CD1400_MAX_SPEED */
3127 }
3128
3129 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3130 ASYNC_SPD_CUST) {
3131 cyy_baud_calc(info, baud_rate);
3132 } else {
3133 if (info->chip_rev >= CD1400_REV_J) {
3134 /* It is a CD1400 rev. J or later */
3135 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3136 info->tco = baud_co_60[i]; /* Tx CO */
3137 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3138 info->rco = baud_co_60[i]; /* Rx CO */
3139 } else {
3140 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3141 info->tco = baud_co_25[i]; /* Tx CO */
3142 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3143 info->rco = baud_co_25[i]; /* Rx CO */
3144 }
3145 }
3146 if (baud_table[i] == 134) {
3147 /* get it right for 134.5 baud */
3148 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3149 2;
3150 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3151 ASYNC_SPD_CUST) {
3152 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3153 baud_rate) + 2;
3154 } else if (baud_table[i]) {
3155 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3156 baud_table[i]) + 2;
3157 /* this needs to be propagated into the card info */
3158 } else {
3159 info->timeout = 0;
3160 }
3161 /* By tradition (is it a standard?) a baud rate of zero
3162 implies the line should be/has been closed. A bit
3163 later in this routine such a test is performed. */
3164
3165 /* byte size and parity */
3166 info->cor5 = 0;
3167 info->cor4 = 0;
3168 /* receive threshold */
3169 info->cor3 = (info->default_threshold ?
3170 info->default_threshold : baud_cor3[i]);
3171 info->cor2 = CyETC;
3172 switch (cflag & CSIZE) {
3173 case CS5:
3174 info->cor1 = Cy_5_BITS;
3175 break;
3176 case CS6:
3177 info->cor1 = Cy_6_BITS;
3178 break;
3179 case CS7:
3180 info->cor1 = Cy_7_BITS;
3181 break;
3182 case CS8:
3183 info->cor1 = Cy_8_BITS;
3184 break;
3185 }
3186 if (cflag & CSTOPB) {
3187 info->cor1 |= Cy_2_STOP;
3188 }
3189 if (cflag & PARENB) {
3190 if (cflag & PARODD) {
3191 info->cor1 |= CyPARITY_O;
3192 } else {
3193 info->cor1 |= CyPARITY_E;
3194 }
3195 } else {
3196 info->cor1 |= CyPARITY_NONE;
3197 }
3198
3199 /* CTS flow control flag */
3200 if (cflag & CRTSCTS) {
3201 info->flags |= ASYNC_CTS_FLOW;
3202 info->cor2 |= CyCtsAE;
3203 } else {
3204 info->flags &= ~ASYNC_CTS_FLOW;
3205 info->cor2 &= ~CyCtsAE;
3206 }
3207 if (cflag & CLOCAL)
3208 info->flags &= ~ASYNC_CHECK_CD;
3209 else
3210 info->flags |= ASYNC_CHECK_CD;
1da177e4
LT		 3211
3212 /***********************************************
3213 The hardware option, CyRtsAO, presents RTS when
3214 the chip has characters to send. Since most modems
3215 use RTS as reverse (inbound) flow control, this
3216 option is not used. If inbound flow control is
3217 necessary, DTR can be programmed to provide the
3218 appropriate signals for use with a non-standard
3219 cable. Contact Marcio Saito for details.
3220 ***********************************************/
3221
02f1175c
JS		 3222 chip = channel >> 2;
3223 channel &= 0x03;
3224 base_addr = cy_card[card].base_addr +
3225 (cy_chip_offset[chip] << index);
1da177e4 3226
02f1175c
JS		 3227 CY_LOCK(info, flags);
3228 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3229
3230 /* tx and rx baud rate */
3231
3232 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3233 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3234 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3235 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3236
3237 /* set line characteristics according configuration */
3238
3239 cy_writeb(base_addr + (CySCHR1 << index),
3240 START_CHAR(info->tty));
3241 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3242 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3243 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3244 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3245 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3246 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3247
3248 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3249 CyCOR3ch, index);
3250
3251 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3252 cy_writeb(base_addr + (CyRTPR << index),
3253 (info->default_timeout ? info->default_timeout : 0x02));
3254 /* 10ms rx timeout */
3255
3256 if (C_CLOCAL(info->tty)) {
3257 /* without modem intr */
3258 cy_writeb(base_addr + (CySRER << index),
db05c3b1 3259 readb(base_addr + (CySRER << index)) | CyMdmCh);
02f1175c
JS		 3260 /* act on 1->0 modem transitions */
3261 if ((cflag & CRTSCTS) && info->rflow) {
3262 cy_writeb(base_addr + (CyMCOR1 << index),
3263 (CyCTS | rflow_thr[i]));
3264 } else {
3265 cy_writeb(base_addr + (CyMCOR1 << index),
3266 CyCTS);
3267 }
3268 /* act on 0->1 modem transitions */
3269 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
1da177e4 3270 } else {
02f1175c
JS		 3271 /* without modem intr */
3272 cy_writeb(base_addr + (CySRER << index),
db05c3b1 3273 readb(base_addr +
02f1175c
JS		 3274 (CySRER << index)) | CyMdmCh);
3275 /* act on 1->0 modem transitions */
3276 if ((cflag & CRTSCTS) && info->rflow) {
3277 cy_writeb(base_addr + (CyMCOR1 << index),
3278 (CyDSR | CyCTS | CyRI | CyDCD |
3279 rflow_thr[i]));
3280 } else {
3281 cy_writeb(base_addr + (CyMCOR1 << index),
3282 CyDSR | CyCTS | CyRI | CyDCD);
3283 }
3284 /* act on 0->1 modem transitions */
3285 cy_writeb(base_addr + (CyMCOR2 << index),
3286 CyDSR | CyCTS | CyRI | CyDCD);
1da177e4 3287 }
02f1175c
JS		 3288
3289 if (i == 0) { /* baud rate is zero, turn off line */
3290 if (info->rtsdtr_inv) {
3291 cy_writeb(base_addr + (CyMSVR1 << index),
3292 ~CyRTS);
3293 } else {
3294 cy_writeb(base_addr + (CyMSVR2 << index),
3295 ~CyDTR);
3296 }
1da177e4 3297#ifdef CY_DEBUG_DTR
02f1175c
JS		 3298 printk("cyc:set_line_char dropping DTR\n");
3299 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 3300 readb(base_addr + (CyMSVR1 << index)),
3301 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3302#endif
02f1175c
JS		 3303 } else {
3304 if (info->rtsdtr_inv) {
3305 cy_writeb(base_addr + (CyMSVR1 << index),
3306 CyRTS);
3307 } else {
3308 cy_writeb(base_addr + (CyMSVR2 << index),
3309 CyDTR);
3310 }
1da177e4 3311#ifdef CY_DEBUG_DTR
02f1175c
JS		 3312 printk("cyc:set_line_char raising DTR\n");
3313 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 3314 readb(base_addr + (CyMSVR1 << index)),
3315 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3316#endif
02f1175c 3317 }
1da177e4 3318
02f1175c
JS		 3319 if (info->tty) {
3320 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3321 }
3322 CY_UNLOCK(info, flags);
1da177e4 3323
1da177e4 3324 } else {
02f1175c
JS		 3325 struct FIRM_ID __iomem *firm_id;
3326 struct ZFW_CTRL __iomem *zfw_ctrl;
3327 struct BOARD_CTRL __iomem *board_ctrl;
3328 struct CH_CTRL __iomem *ch_ctrl;
3329 struct BUF_CTRL __iomem *buf_ctrl;
1a86b5e3 3330 __u32 sw_flow;
02f1175c 3331 int retval;
1da177e4 3332
02f1175c
JS		 3333 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3334 if (!ISZLOADED(cy_card[card])) {
3335 return;
3336 }
1da177e4 3337
02f1175c 3338 zfw_ctrl = cy_card[card].base_addr +
db05c3b1 3339 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3340 board_ctrl = &zfw_ctrl->board_ctrl;
3341 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3342 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3343
3344 /* baud rate */
3345 baud = tty_get_baud_rate(info->tty);
3346 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3347 ASYNC_SPD_CUST) {
3348 if (info->custom_divisor)
3349 baud_rate = info->baud / info->custom_divisor;
3350 else
3351 baud_rate = info->baud;
3352 } else if (baud > CYZ_MAX_SPEED) {
3353 baud = CYZ_MAX_SPEED;
3354 }
3355 cy_writel(&ch_ctrl->comm_baud, baud);
3356
3357 if (baud == 134) {
3358 /* get it right for 134.5 baud */
3359 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3360 2;
3361 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3362 ASYNC_SPD_CUST) {
3363 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3364 baud_rate) + 2;
3365 } else if (baud) {
3366 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3367 baud) + 2;
3368 /* this needs to be propagated into the card info */
3369 } else {
3370 info->timeout = 0;
3371 }
1da177e4 3372
02f1175c
JS		 3373 /* byte size and parity */
3374 switch (cflag & CSIZE) {
3375 case CS5:
3376 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3377 break;
3378 case CS6:
3379 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3380 break;
3381 case CS7:
3382 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3383 break;
3384 case CS8:
3385 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3386 break;
3387 }
3388 if (cflag & CSTOPB) {
3389 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 3390 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
02f1175c
JS		 3391 } else {
3392 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 3393 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
02f1175c
JS		 3394 }
3395 if (cflag & PARENB) {
3396 if (cflag & PARODD) {
3397 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3398 } else {
3399 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3400 }
3401 } else {
3402 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3403 }
1da177e4 3404
02f1175c
JS		 3405 /* CTS flow control flag */
3406 if (cflag & CRTSCTS) {
3407 cy_writel(&ch_ctrl->hw_flow,
db05c3b1 3408 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
02f1175c 3409 } else {
db05c3b1
JS		 3410 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3411 ~(C_RS_CTS | C_RS_RTS));
02f1175c
JS		 3412 }
3413 /* As the HW flow control is done in firmware, the driver
3414 doesn't need to care about it */
3415 info->flags &= ~ASYNC_CTS_FLOW;
3416
3417 /* XON/XOFF/XANY flow control flags */
3418 sw_flow = 0;
3419 if (iflag & IXON) {
3420 sw_flow |= C_FL_OXX;
3421 if (iflag & IXANY)
3422 sw_flow |= C_FL_OIXANY;
3423 }
3424 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3425
3426 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
3427 if (retval != 0) {
3428 printk("cyc:set_line_char retval on ttyC%d was %x\n",
3429 info->line, retval);
3430 }
3431
3432 /* CD sensitivity */
3433 if (cflag & CLOCAL) {
3434 info->flags &= ~ASYNC_CHECK_CD;
3435 } else {
3436 info->flags |= ASYNC_CHECK_CD;
3437 }
1da177e4 3438
02f1175c
JS		 3439 if (baud == 0) { /* baud rate is zero, turn off line */
3440 cy_writel(&ch_ctrl->rs_control,
db05c3b1 3441 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
1da177e4 3442#ifdef CY_DEBUG_DTR
02f1175c 3443 printk("cyc:set_line_char dropping Z DTR\n");
1da177e4 3444#endif
02f1175c
JS		 3445 } else {
3446 cy_writel(&ch_ctrl->rs_control,
db05c3b1 3447 readl(&ch_ctrl->rs_control) | C_RS_DTR);
1da177e4 3448#ifdef CY_DEBUG_DTR
02f1175c 3449 printk("cyc:set_line_char raising Z DTR\n");
1da177e4 3450#endif
02f1175c 3451 }
1da177e4 3452
02f1175c
JS		 3453 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTLM,0L);
3454 if (retval != 0) {
3455 printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
3456 info->line, retval);
3457 }
1da177e4 3458
02f1175c
JS		 3459 if (info->tty) {
3460 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3461 }
1da177e4 3462 }
02f1175c 3463} /* set_line_char */
1da177e4
LT		 3464
3465static int
02f1175c
JS		 3466get_serial_info(struct cyclades_port *info,
3467 struct serial_struct __user * retinfo)
1da177e4 3468{
02f1175c
JS		 3469 struct serial_struct tmp;
3470 struct cyclades_card *cinfo = &cy_card[info->card];
1da177e4 3471
02f1175c
JS		 3472 if (!retinfo)
3473 return -EFAULT;
3474 memset(&tmp, 0, sizeof(tmp));
3475 tmp.type = info->type;
3476 tmp.line = info->line;
3477 tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
3478 tmp.irq = cinfo->irq;
3479 tmp.flags = info->flags;
3480 tmp.close_delay = info->close_delay;
d5dedf99 3481 tmp.closing_wait = info->closing_wait;
02f1175c
JS		 3482 tmp.baud_base = info->baud;
3483 tmp.custom_divisor = info->custom_divisor;
3484 tmp.hub6 = 0; /*!!! */
3485 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3486} /* get_serial_info */
1da177e4
LT		 3487
3488static int
02f1175c
JS		 3489set_serial_info(struct cyclades_port *info,
3490 struct serial_struct __user * new_info)
1da177e4 3491{
02f1175c
JS		 3492 struct serial_struct new_serial;
3493 struct cyclades_port old_info;
3494
3495 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3496 return -EFAULT;
3497 old_info = *info;
3498
3499 if (!capable(CAP_SYS_ADMIN)) {
3500 if (new_serial.close_delay != info->close_delay ||
3501 new_serial.baud_base != info->baud ||
3502 (new_serial.flags & ASYNC_FLAGS &
3503 ~ASYNC_USR_MASK) !=
3504 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3505 return -EPERM;
3506 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3507 (new_serial.flags & ASYNC_USR_MASK);
3508 info->baud = new_serial.baud_base;
3509 info->custom_divisor = new_serial.custom_divisor;
3510 goto check_and_exit;
3511 }
3512
3513 /*
3514 * OK, past this point, all the error checking has been done.
3515 * At this point, we start making changes.....
3516 */
3517
3518 info->baud = new_serial.baud_base;
3519 info->custom_divisor = new_serial.custom_divisor;
3520 info->flags = (info->flags & ~ASYNC_FLAGS) |
3521 (new_serial.flags & ASYNC_FLAGS);
3522 info->close_delay = new_serial.close_delay * HZ / 100;
3523 info->closing_wait = new_serial.closing_wait * HZ / 100;
1da177e4
LT		 3524
3525check_and_exit:
02f1175c
JS		 3526 if (info->flags & ASYNC_INITIALIZED) {
3527 set_line_char(info);
3528 return 0;
3529 } else {
3530 return startup(info);
3531 }
3532} /* set_serial_info */
1da177e4
LT		 3533
3534/*
3535 * get_lsr_info - get line status register info
3536 *
3537 * Purpose: Let user call ioctl() to get info when the UART physically
3538 * is emptied. On bus types like RS485, the transmitter must
3539 * release the bus after transmitting. This must be done when
3540 * the transmit shift register is empty, not be done when the
3541 * transmit holding register is empty. This functionality
3542 * allows an RS485 driver to be written in user space.
3543 */
02f1175c 3544static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
1da177e4 3545{
02f1175c
JS		 3546 int card, chip, channel, index;
3547 unsigned char status;
3548 unsigned int result;
3549 unsigned long flags;
3550 void __iomem *base_addr;
1da177e4 3551
02f1175c
JS		 3552 card = info->card;
3553 channel = (info->line) - (cy_card[card].first_line);
3554 if (!IS_CYC_Z(cy_card[card])) {
3555 chip = channel >> 2;
3556 channel &= 0x03;
3557 index = cy_card[card].bus_index;
3558 base_addr =
3559 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3560
3561 CY_LOCK(info, flags);
db05c3b1 3562 status = readb(base_addr + (CySRER << index)) &
02f1175c
JS		 3563 (CyTxRdy | CyTxMpty);
3564 CY_UNLOCK(info, flags);
3565 result = (status ? 0 : TIOCSER_TEMT);
3566 } else {
3567 /* Not supported yet */
3568 return -EINVAL;
3569 }
3570 return put_user(result, (unsigned long __user *)value);
1da177e4
LT		 3571}
3572
02f1175c 3573static int cy_tiocmget(struct tty_struct *tty, struct file *file)
1da177e4 3574{
cab9bdd1 3575 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 3576 int card, chip, channel, index;
3577 void __iomem *base_addr;
3578 unsigned long flags;
3579 unsigned char status;
3580 unsigned long lstatus;
3581 unsigned int result;
3582 struct FIRM_ID __iomem *firm_id;
3583 struct ZFW_CTRL __iomem *zfw_ctrl;
3584 struct BOARD_CTRL __iomem *board_ctrl;
3585 struct CH_CTRL __iomem *ch_ctrl;
3586
3587 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3588 return -ENODEV;
1da177e4 3589
02f1175c
JS		 3590 card = info->card;
3591 channel = (info->line) - (cy_card[card].first_line);
3592 if (!IS_CYC_Z(cy_card[card])) {
3593 chip = channel >> 2;
3594 channel &= 0x03;
3595 index = cy_card[card].bus_index;
3596 base_addr =
3597 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
1da177e4 3598
02f1175c
JS		 3599 CY_LOCK(info, flags);
3600 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
db05c3b1
JS		 3601 status = readb(base_addr + (CyMSVR1 << index));
3602 status |= readb(base_addr + (CyMSVR2 << index));
02f1175c
JS		 3603 CY_UNLOCK(info, flags);
3604
3605 if (info->rtsdtr_inv) {
3606 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3607 ((status & CyDTR) ? TIOCM_RTS : 0);
3608 } else {
3609 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3610 ((status & CyDTR) ? TIOCM_DTR : 0);
3611 }
3612 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3613 ((status & CyRI) ? TIOCM_RNG : 0) |
3614 ((status & CyDSR) ? TIOCM_DSR : 0) |
3615 ((status & CyCTS) ? TIOCM_CTS : 0);
1da177e4 3616 } else {
02f1175c 3617 base_addr = cy_card[card].base_addr;
1da177e4 3618
02f1175c
JS		 3619 if (cy_card[card].num_chips != -1) {
3620 return -EINVAL;
3621 }
1da177e4 3622
02f1175c
JS		 3623 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3624 if (ISZLOADED(cy_card[card])) {
3625 zfw_ctrl = cy_card[card].base_addr +
db05c3b1 3626 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3627 board_ctrl = &zfw_ctrl->board_ctrl;
3628 ch_ctrl = zfw_ctrl->ch_ctrl;
db05c3b1 3629 lstatus = readl(&ch_ctrl[channel].rs_status);
02f1175c
JS		 3630 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3631 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3632 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3633 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3634 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3635 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3636 } else {
3637 result = 0;
3638 return -ENODEV;
3639 }
1da177e4 3640
02f1175c
JS		 3641 }
3642 return result;
3643} /* cy_tiomget */
1da177e4
LT		 3644
3645static int
3646cy_tiocmset(struct tty_struct *tty, struct file *file,
02f1175c 3647 unsigned int set, unsigned int clear)
1da177e4 3648{
cab9bdd1 3649 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 3650 int card, chip, channel, index;
3651 void __iomem *base_addr;
3652 unsigned long flags;
3653 struct FIRM_ID __iomem *firm_id;
3654 struct ZFW_CTRL __iomem *zfw_ctrl;
3655 struct BOARD_CTRL __iomem *board_ctrl;
3656 struct CH_CTRL __iomem *ch_ctrl;
3657 int retval;
3658
3659 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3660 return -ENODEV;
3661
3662 card = info->card;
3663 channel = (info->line) - (cy_card[card].first_line);
3664 if (!IS_CYC_Z(cy_card[card])) {
3665 chip = channel >> 2;
3666 channel &= 0x03;
3667 index = cy_card[card].bus_index;
3668 base_addr =
3669 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3670
3671 if (set & TIOCM_RTS) {
3672 CY_LOCK(info, flags);
3673 cy_writeb(base_addr + (CyCAR << index),
3674 (u_char) channel);
3675 if (info->rtsdtr_inv) {
3676 cy_writeb(base_addr + (CyMSVR2 << index),
3677 CyDTR);
3678 } else {
3679 cy_writeb(base_addr + (CyMSVR1 << index),
3680 CyRTS);
3681 }
3682 CY_UNLOCK(info, flags);
3683 }
3684 if (clear & TIOCM_RTS) {
3685 CY_LOCK(info, flags);
3686 cy_writeb(base_addr + (CyCAR << index),
3687 (u_char) channel);
3688 if (info->rtsdtr_inv) {
3689 cy_writeb(base_addr + (CyMSVR2 << index),
3690 ~CyDTR);
3691 } else {
3692 cy_writeb(base_addr + (CyMSVR1 << index),
3693 ~CyRTS);
3694 }
3695 CY_UNLOCK(info, flags);
3696 }
3697 if (set & TIOCM_DTR) {
3698 CY_LOCK(info, flags);
3699 cy_writeb(base_addr + (CyCAR << index),
3700 (u_char) channel);
3701 if (info->rtsdtr_inv) {
3702 cy_writeb(base_addr + (CyMSVR1 << index),
3703 CyRTS);
3704 } else {
3705 cy_writeb(base_addr + (CyMSVR2 << index),
3706 CyDTR);
3707 }
1da177e4 3708#ifdef CY_DEBUG_DTR
02f1175c
JS		 3709 printk("cyc:set_modem_info raising DTR\n");
3710 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 3711 readb(base_addr + (CyMSVR1 << index)),
3712 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3713#endif
02f1175c
JS		 3714 CY_UNLOCK(info, flags);
3715 }
3716 if (clear & TIOCM_DTR) {
3717 CY_LOCK(info, flags);
3718 cy_writeb(base_addr + (CyCAR << index),
3719 (u_char) channel);
3720 if (info->rtsdtr_inv) {
3721 cy_writeb(base_addr + (CyMSVR1 << index),
3722 ~CyRTS);
3723 } else {
3724 cy_writeb(base_addr + (CyMSVR2 << index),
3725 ~CyDTR);
3726 }
1da177e4
LT		 3727
3728#ifdef CY_DEBUG_DTR
02f1175c
JS		 3729 printk("cyc:set_modem_info dropping DTR\n");
3730 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 3731 readb(base_addr + (CyMSVR1 << index)),
3732 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3733#endif
02f1175c
JS		 3734 CY_UNLOCK(info, flags);
3735 }
3736 } else {
3737 base_addr = cy_card[card].base_addr;
3738
3739 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3740 if (ISZLOADED(cy_card[card])) {
3741 zfw_ctrl = cy_card[card].base_addr +
db05c3b1 3742 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3743 board_ctrl = &zfw_ctrl->board_ctrl;
3744 ch_ctrl = zfw_ctrl->ch_ctrl;
3745
3746 if (set & TIOCM_RTS) {
3747 CY_LOCK(info, flags);
3748 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3749 readl(&ch_ctrl[channel].rs_control) |
3750 C_RS_RTS);
02f1175c
JS		 3751 CY_UNLOCK(info, flags);
3752 }
3753 if (clear & TIOCM_RTS) {
3754 CY_LOCK(info, flags);
3755 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3756 readl(&ch_ctrl[channel].rs_control) &
3757 ~C_RS_RTS);
02f1175c
JS		 3758 CY_UNLOCK(info, flags);
3759 }
3760 if (set & TIOCM_DTR) {
3761 CY_LOCK(info, flags);
3762 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3763 readl(&ch_ctrl[channel].rs_control) |
3764 C_RS_DTR);
1da177e4 3765#ifdef CY_DEBUG_DTR
02f1175c 3766 printk("cyc:set_modem_info raising Z DTR\n");
1da177e4 3767#endif
02f1175c
JS		 3768 CY_UNLOCK(info, flags);
3769 }
3770 if (clear & TIOCM_DTR) {
3771 CY_LOCK(info, flags);
3772 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3773 readl(&ch_ctrl[channel].rs_control) &
3774 ~C_RS_DTR);
1da177e4 3775#ifdef CY_DEBUG_DTR
02f1175c 3776 printk("cyc:set_modem_info clearing Z DTR\n");
1da177e4 3777#endif
02f1175c
JS		 3778 CY_UNLOCK(info, flags);
3779 }
3780 } else {
3781 return -ENODEV;
3782 }
3783 CY_LOCK(info, flags);
3784 retval = cyz_issue_cmd(&cy_card[info->card],
3785 channel, C_CM_IOCTLM, 0L);
3786 if (retval != 0) {
3787 printk("cyc:set_modem_info retval on ttyC%d was %x\n",
3788 info->line, retval);
3789 }
3790 CY_UNLOCK(info, flags);
1da177e4 3791 }
02f1175c
JS		 3792 return 0;
3793} /* cy_tiocmset */
1da177e4
LT		 3794
3795/*
3796 * cy_break() --- routine which turns the break handling on or off
3797 */
02f1175c 3798static void cy_break(struct tty_struct *tty, int break_state)
1da177e4 3799{
cab9bdd1 3800 struct cyclades_port *info = tty->driver_data;
02f1175c 3801 unsigned long flags;
1da177e4 3802
02f1175c
JS		 3803 if (serial_paranoia_check(info, tty->name, "cy_break"))
3804 return;
1da177e4 3805
02f1175c
JS		 3806 CY_LOCK(info, flags);
3807 if (!IS_CYC_Z(cy_card[info->card])) {
3808 /* Let the transmit ISR take care of this (since it
3809 requires stuffing characters into the output stream).
3810 */
3811 if (break_state == -1) {
3812 if (!info->breakon) {
3813 info->breakon = 1;
3814 if (!info->xmit_cnt) {
3815 CY_UNLOCK(info, flags);
3816 start_xmit(info);
3817 CY_LOCK(info, flags);
3818 }
3819 }
3820 } else {
3821 if (!info->breakoff) {
3822 info->breakoff = 1;
3823 if (!info->xmit_cnt) {
3824 CY_UNLOCK(info, flags);
3825 start_xmit(info);
3826 CY_LOCK(info, flags);
3827 }
3828 }
1da177e4 3829 }
1da177e4 3830 } else {
02f1175c
JS		 3831 int retval;
3832
3833 if (break_state == -1) {
3834 retval = cyz_issue_cmd(&cy_card[info->card],
3835 info->line - cy_card[info->card].first_line,
3836 C_CM_SET_BREAK, 0L);
3837 if (retval != 0) {
3838 printk("cyc:cy_break (set) retval on ttyC%d "
3839 "was %x\n", info->line, retval);
3840 }
3841 } else {
3842 retval = cyz_issue_cmd(&cy_card[info->card],
3843 info->line - cy_card[info->card].first_line,
3844 C_CM_CLR_BREAK, 0L);
3845 if (retval != 0) {
3846 printk("cyc:cy_break (clr) retval on ttyC%d "
3847 "was %x\n", info->line, retval);
3848 }
1da177e4 3849 }
1da177e4 3850 }
02f1175c
JS		 3851 CY_UNLOCK(info, flags);
3852} /* cy_break */
1da177e4
LT		 3853
3854static int
02f1175c 3855get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
1da177e4
LT		 3856{
3857
02f1175c
JS		 3858 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3859 return -EFAULT;
3860 info->mon.int_count = 0;
3861 info->mon.char_count = 0;
3862 info->mon.char_max = 0;
3863 info->mon.char_last = 0;
3864 return 0;
3865} /* get_mon_info */
1da177e4 3866
02f1175c 3867static int set_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 3868{
02f1175c
JS		 3869 void __iomem *base_addr;
3870 int card, channel, chip, index;
3871 unsigned long flags;
1da177e4 3872
02f1175c
JS		 3873 card = info->card;
3874 channel = info->line - cy_card[card].first_line;
3875 if (!IS_CYC_Z(cy_card[card])) {
3876 chip = channel >> 2;
3877 channel &= 0x03;
3878 index = cy_card[card].bus_index;
3879 base_addr =
3880 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3881
3882 info->cor3 &= ~CyREC_FIFO;
3883 info->cor3 |= value & CyREC_FIFO;
1da177e4 3884
02f1175c
JS		 3885 CY_LOCK(info, flags);
3886 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3887 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3888 CY_UNLOCK(info, flags);
3889 } else {
096dcfce 3890 /* Nothing to do! */
02f1175c
JS		 3891 }
3892 return 0;
3893} /* set_threshold */
1da177e4
LT		 3894
3895static int
02f1175c 3896get_threshold(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3897{
02f1175c
JS		 3898 void __iomem *base_addr;
3899 int card, channel, chip, index;
3900 unsigned long tmp;
1da177e4 3901
02f1175c
JS		 3902 card = info->card;
3903 channel = info->line - cy_card[card].first_line;
3904 if (!IS_CYC_Z(cy_card[card])) {
3905 chip = channel >> 2;
3906 channel &= 0x03;
3907 index = cy_card[card].bus_index;
3908 base_addr =
3909 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3910
db05c3b1 3911 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
02f1175c
JS		 3912 return put_user(tmp, value);
3913 } else {
096dcfce 3914 /* Nothing to do! */
02f1175c
JS		 3915 return 0;
3916 }
3917} /* get_threshold */
1da177e4
LT		 3918
3919static int
02f1175c 3920set_default_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 3921{
02f1175c
JS		 3922 info->default_threshold = value & 0x0f;
3923 return 0;
3924} /* set_default_threshold */
1da177e4
LT		 3925
3926static int
02f1175c 3927get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3928{
02f1175c
JS		 3929 return put_user(info->default_threshold, value);
3930} /* get_default_threshold */
1da177e4 3931
02f1175c 3932static int set_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3933{
02f1175c
JS		 3934 void __iomem *base_addr;
3935 int card, channel, chip, index;
3936 unsigned long flags;
1da177e4 3937
02f1175c
JS		 3938 card = info->card;
3939 channel = info->line - cy_card[card].first_line;
3940 if (!IS_CYC_Z(cy_card[card])) {
3941 chip = channel >> 2;
3942 channel &= 0x03;
3943 index = cy_card[card].bus_index;
3944 base_addr =
3945 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
1da177e4 3946
02f1175c
JS		 3947 CY_LOCK(info, flags);
3948 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3949 CY_UNLOCK(info, flags);
3950 } else {
096dcfce 3951 /* Nothing to do! */
02f1175c
JS		 3952 }
3953 return 0;
3954} /* set_timeout */
1da177e4 3955
02f1175c 3956static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3957{
02f1175c
JS		 3958 void __iomem *base_addr;
3959 int card, channel, chip, index;
3960 unsigned long tmp;
1da177e4 3961
02f1175c
JS		 3962 card = info->card;
3963 channel = info->line - cy_card[card].first_line;
3964 if (!IS_CYC_Z(cy_card[card])) {
3965 chip = channel >> 2;
3966 channel &= 0x03;
3967 index = cy_card[card].bus_index;
3968 base_addr =
3969 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3970
db05c3b1 3971 tmp = readb(base_addr + (CyRTPR << index));
02f1175c
JS		 3972 return put_user(tmp, value);
3973 } else {
096dcfce 3974 /* Nothing to do! */
02f1175c
JS		 3975 return 0;
3976 }
3977} /* get_timeout */
1da177e4 3978
02f1175c 3979static int set_default_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3980{
02f1175c
JS		 3981 info->default_timeout = value & 0xff;
3982 return 0;
3983} /* set_default_timeout */
1da177e4
LT		 3984
3985static int
02f1175c 3986get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3987{
02f1175c
JS		 3988 return put_user(info->default_timeout, value);
3989} /* get_default_timeout */
1da177e4
LT		 3990
3991/*
3992 * This routine allows the tty driver to implement device-
3993 * specific ioctl's. If the ioctl number passed in cmd is
3994 * not recognized by the driver, it should return ENOIOCTLCMD.
3995 */
3996static int
02f1175c
JS		 3997cy_ioctl(struct tty_struct *tty, struct file *file,
3998 unsigned int cmd, unsigned long arg)
1da177e4 3999{
cab9bdd1 4000 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4001 struct cyclades_icount cprev, cnow; /* kernel counter temps */
4002 struct serial_icounter_struct __user *p_cuser; /* user space */
4003 int ret_val = 0;
4004 unsigned long flags;
4005 void __user *argp = (void __user *)arg;
4006
4007 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
4008 return -ENODEV;
1da177e4
LT		 4009
4010#ifdef CY_DEBUG_OTHER
02f1175c 4011 printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", info->line, cmd, arg); /* */
1da177e4
LT		 4012#endif
4013
02f1175c
JS		 4014 switch (cmd) {
4015 case CYGETMON:
4016 ret_val = get_mon_info(info, argp);
4017 break;
4018 case CYGETTHRESH:
4019 ret_val = get_threshold(info, argp);
4020 break;
4021 case CYSETTHRESH:
4022 ret_val = set_threshold(info, arg);
4023 break;
4024 case CYGETDEFTHRESH:
4025 ret_val = get_default_threshold(info, argp);
4026 break;
4027 case CYSETDEFTHRESH:
4028 ret_val = set_default_threshold(info, arg);
4029 break;
4030 case CYGETTIMEOUT:
4031 ret_val = get_timeout(info, argp);
4032 break;
4033 case CYSETTIMEOUT:
4034 ret_val = set_timeout(info, arg);
4035 break;
4036 case CYGETDEFTIMEOUT:
4037 ret_val = get_default_timeout(info, argp);
4038 break;
4039 case CYSETDEFTIMEOUT:
4040 ret_val = set_default_timeout(info, arg);
4041 break;
1da177e4 4042 case CYSETRFLOW:
02f1175c
JS		 4043 info->rflow = (int)arg;
4044 ret_val = 0;
4045 break;
1da177e4 4046 case CYGETRFLOW:
02f1175c
JS		 4047 ret_val = info->rflow;
4048 break;
1da177e4 4049 case CYSETRTSDTR_INV:
02f1175c
JS		 4050 info->rtsdtr_inv = (int)arg;
4051 ret_val = 0;
4052 break;
1da177e4 4053 case CYGETRTSDTR_INV:
02f1175c
JS		 4054 ret_val = info->rtsdtr_inv;
4055 break;
1da177e4 4056 case CYGETCARDINFO:
02f1175c
JS		 4057 if (copy_to_user(argp, &cy_card[info->card],
4058 sizeof(struct cyclades_card))) {
4059 ret_val = -EFAULT;
4060 break;
4061 }
4062 ret_val = 0;
1da177e4 4063 break;
1da177e4 4064 case CYGETCD1400VER:
02f1175c
JS		 4065 ret_val = info->chip_rev;
4066 break;
1da177e4
LT		 4067#ifndef CONFIG_CYZ_INTR
4068 case CYZSETPOLLCYCLE:
02f1175c
JS		 4069 cyz_polling_cycle = (arg * HZ) / 1000;
4070 ret_val = 0;
4071 break;
1da177e4 4072 case CYZGETPOLLCYCLE:
02f1175c
JS		 4073 ret_val = (cyz_polling_cycle * 1000) / HZ;
4074 break;
4075#endif /* CONFIG_CYZ_INTR */
1da177e4 4076 case CYSETWAIT:
02f1175c
JS		 4077 info->closing_wait = (unsigned short)arg *HZ / 100;
4078 ret_val = 0;
4079 break;
1da177e4 4080 case CYGETWAIT:
02f1175c
JS		 4081 ret_val = info->closing_wait / (HZ / 100);
4082 break;
4083 case TIOCGSERIAL:
4084 ret_val = get_serial_info(info, argp);
4085 break;
4086 case TIOCSSERIAL:
4087 ret_val = set_serial_info(info, argp);
4088 break;
4089 case TIOCSERGETLSR: /* Get line status register */
4090 ret_val = get_lsr_info(info, argp);
4091 break;
4092 /*
4093 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4094 * - mask passed in arg for lines of interest
4095 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4096 * Caller should use TIOCGICOUNT to see which one it was
4097 */
1da177e4 4098 case TIOCMIWAIT:
1da177e4 4099 CY_LOCK(info, flags);
02f1175c
JS		 4100 /* note the counters on entry */
4101 cprev = info->icount;
1da177e4 4102 CY_UNLOCK(info, flags);
02f1175c
JS		 4103 while (1) {
4104 interruptible_sleep_on(&info->delta_msr_wait);
4105 /* see if a signal did it */
4106 if (signal_pending(current)) {
4107 return -ERESTARTSYS;
4108 }
1da177e4 4109
02f1175c
JS		 4110 CY_LOCK(info, flags);
4111 cnow = info->icount; /* atomic copy */
4112 CY_UNLOCK(info, flags);
4113
4114 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
4115 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
4116 return -EIO; /* no change => error */
4117 }
4118 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4119 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4120 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4121 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
4122 return 0;
4123 }
4124 cprev = cnow;
1da177e4 4125 }
02f1175c 4126 /* NOTREACHED */
1da177e4 4127
02f1175c
JS		 4128 /*
4129 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4130 * Return: write counters to the user passed counter struct
4131 * NB: both 1->0 and 0->1 transitions are counted except for
4132 * RI where only 0->1 is counted.
4133 */
1da177e4 4134 case TIOCGICOUNT:
02f1175c
JS		 4135 CY_LOCK(info, flags);
4136 cnow = info->icount;
4137 CY_UNLOCK(info, flags);
4138 p_cuser = argp;
4139 ret_val = put_user(cnow.cts, &p_cuser->cts);
4140 if (ret_val)
4141 return ret_val;
4142 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4143 if (ret_val)
4144 return ret_val;
4145 ret_val = put_user(cnow.rng, &p_cuser->rng);
4146 if (ret_val)
4147 return ret_val;
4148 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4149 if (ret_val)
4150 return ret_val;
4151 ret_val = put_user(cnow.rx, &p_cuser->rx);
4152 if (ret_val)
4153 return ret_val;
4154 ret_val = put_user(cnow.tx, &p_cuser->tx);
4155 if (ret_val)
4156 return ret_val;
4157 ret_val = put_user(cnow.frame, &p_cuser->frame);
4158 if (ret_val)
4159 return ret_val;
4160 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4161 if (ret_val)
4162 return ret_val;
4163 ret_val = put_user(cnow.parity, &p_cuser->parity);
4164 if (ret_val)
4165 return ret_val;
4166 ret_val = put_user(cnow.brk, &p_cuser->brk);
4167 if (ret_val)
4168 return ret_val;
4169 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4170 if (ret_val)
4171 return ret_val;
4172 ret_val = 0;
4173 break;
4174 default:
4175 ret_val = -ENOIOCTLCMD;
4176 }
1da177e4
LT		 4177
4178#ifdef CY_DEBUG_OTHER
02f1175c 4179 printk(" cyc:cy_ioctl done\n");
1da177e4
LT		 4180#endif
4181
02f1175c
JS		 4182 return ret_val;
4183} /* cy_ioctl */
1da177e4
LT		 4184
4185/*
4186 * This routine allows the tty driver to be notified when
4187 * device's termios settings have changed. Note that a
4188 * well-designed tty driver should be prepared to accept the case
4189 * where old == NULL, and try to do something rational.
4190 */
02f1175c 4191static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 4192{
cab9bdd1 4193 struct cyclades_port *info = tty->driver_data;
1da177e4
LT		 4194
4195#ifdef CY_DEBUG_OTHER
02f1175c 4196 printk("cyc:cy_set_termios ttyC%d\n", info->line);
1da177e4
LT		 4197#endif
4198
02f1175c
JS		 4199 if (tty->termios->c_cflag == old_termios->c_cflag &&
4200 (tty->termios->c_iflag & (IXON | IXANY)) ==
4201 (old_termios->c_iflag & (IXON | IXANY)))
4202 return;
4203 set_line_char(info);
4204
4205 if ((old_termios->c_cflag & CRTSCTS) &&
4206 !(tty->termios->c_cflag & CRTSCTS)) {
4207 tty->hw_stopped = 0;
4208 cy_start(tty);
4209 }
1da177e4 4210#if 0
02f1175c
JS		 4211 /*
4212 * No need to wake up processes in open wait, since they
4213 * sample the CLOCAL flag once, and don't recheck it.
4214 * XXX It's not clear whether the current behavior is correct
4215 * or not. Hence, this may change.....
4216 */
4217 if (!(old_termios->c_cflag & CLOCAL) &&
4218 (tty->termios->c_cflag & CLOCAL))
4219 wake_up_interruptible(&info->open_wait);
1da177e4 4220#endif
02f1175c 4221} /* cy_set_termios */
1da177e4
LT		 4222
4223/* This function is used to send a high-priority XON/XOFF character to
4224 the device.
4225*/
02f1175c 4226static void cy_send_xchar(struct tty_struct *tty, char ch)
1da177e4 4227{
cab9bdd1 4228 struct cyclades_port *info = tty->driver_data;
1da177e4
LT		 4229 int card, channel;
4230
02f1175c 4231 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
1da177e4
LT		 4232 return;
4233
02f1175c 4234 info->x_char = ch;
1da177e4
LT		 4235
4236 if (ch)
02f1175c 4237 cy_start(tty);
1da177e4
LT		 4238
4239 card = info->card;
4240 channel = info->line - cy_card[card].first_line;
4241
02f1175c
JS		 4242 if (IS_CYC_Z(cy_card[card])) {
4243 if (ch == STOP_CHAR(tty))
4244 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXOFF,
4245 0L);
4246 else if (ch == START_CHAR(tty))
4247 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXON,
4248 0L);
1da177e4
LT		 4249 }
4250}
4251
4252/* This routine is called by the upper-layer tty layer to signal
4253 that incoming characters should be throttled because the input
4254 buffers are close to full.
4255 */
02f1175c 4256static void cy_throttle(struct tty_struct *tty)
1da177e4 4257{
cab9bdd1 4258 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4259 unsigned long flags;
4260 void __iomem *base_addr;
4261 int card, chip, channel, index;
1da177e4
LT		 4262
4263#ifdef CY_DEBUG_THROTTLE
02f1175c 4264 char buf[64];
1da177e4 4265
02f1175c
JS		 4266 printk("cyc:throttle %s: %d....ttyC%d\n", tty_name(tty, buf),
4267 tty->ldisc.chars_in_buffer(tty), info->line);
1da177e4
LT		 4268#endif
4269
02f1175c
JS		 4270 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4271 return;
4272 }
4273
4274 card = info->card;
4275
4276 if (I_IXOFF(tty)) {
4277 if (!IS_CYC_Z(cy_card[card]))
4278 cy_send_xchar(tty, STOP_CHAR(tty));
4279 else
4280 info->throttle = 1;
4281 }
1da177e4 4282
02f1175c
JS		 4283 if (tty->termios->c_cflag & CRTSCTS) {
4284 channel = info->line - cy_card[card].first_line;
4285 if (!IS_CYC_Z(cy_card[card])) {
4286 chip = channel >> 2;
4287 channel &= 0x03;
4288 index = cy_card[card].bus_index;
4289 base_addr = cy_card[card].base_addr +
4290 (cy_chip_offset[chip] << index);
4291
4292 CY_LOCK(info, flags);
4293 cy_writeb(base_addr + (CyCAR << index),
4294 (u_char) channel);
4295 if (info->rtsdtr_inv) {
4296 cy_writeb(base_addr + (CyMSVR2 << index),
4297 ~CyDTR);
4298 } else {
4299 cy_writeb(base_addr + (CyMSVR1 << index),
4300 ~CyRTS);
4301 }
4302 CY_UNLOCK(info, flags);
4303 } else {
4304 info->throttle = 1;
4305 }
4306 }
02f1175c 4307} /* cy_throttle */
1da177e4
LT		 4308
4309/*
4310 * This routine notifies the tty driver that it should signal
4311 * that characters can now be sent to the tty without fear of
4312 * overrunning the input buffers of the line disciplines.
4313 */
02f1175c 4314static void cy_unthrottle(struct tty_struct *tty)
1da177e4 4315{
cab9bdd1 4316 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4317 unsigned long flags;
4318 void __iomem *base_addr;
4319 int card, chip, channel, index;
1da177e4
LT		 4320
4321#ifdef CY_DEBUG_THROTTLE
02f1175c
JS		 4322 char buf[64];
4323
4324 printk("cyc:unthrottle %s: %d....ttyC%d\n", tty_name(tty, buf),
4325 tty->ldisc.chars_in_buffer(tty), info->line);
1da177e4
LT		 4326#endif
4327
02f1175c
JS		 4328 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4329 return;
4330 }
1da177e4 4331
02f1175c
JS		 4332 if (I_IXOFF(tty)) {
4333 if (info->x_char)
4334 info->x_char = 0;
4335 else
4336 cy_send_xchar(tty, START_CHAR(tty));
1da177e4 4337 }
1da177e4 4338
02f1175c
JS		 4339 if (tty->termios->c_cflag & CRTSCTS) {
4340 card = info->card;
4341 channel = info->line - cy_card[card].first_line;
4342 if (!IS_CYC_Z(cy_card[card])) {
4343 chip = channel >> 2;
4344 channel &= 0x03;
4345 index = cy_card[card].bus_index;
4346 base_addr = cy_card[card].base_addr +
4347 (cy_chip_offset[chip] << index);
4348
4349 CY_LOCK(info, flags);
4350 cy_writeb(base_addr + (CyCAR << index),
4351 (u_char) channel);
4352 if (info->rtsdtr_inv) {
4353 cy_writeb(base_addr + (CyMSVR2 << index),
4354 CyDTR);
4355 } else {
4356 cy_writeb(base_addr + (CyMSVR1 << index),
4357 CyRTS);
4358 }
4359 CY_UNLOCK(info, flags);
4360 } else {
4361 info->throttle = 0;
4362 }
4363 }
02f1175c 4364} /* cy_unthrottle */
1da177e4
LT		 4365
4366/* cy_start and cy_stop provide software output flow control as a
4367 function of XON/XOFF, software CTS, and other such stuff.
4368*/
02f1175c 4369static void cy_stop(struct tty_struct *tty)
1da177e4 4370{
02f1175c 4371 struct cyclades_card *cinfo;
cab9bdd1 4372 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4373 void __iomem *base_addr;
4374 int chip, channel, index;
4375 unsigned long flags;
1da177e4
LT		 4376
4377#ifdef CY_DEBUG_OTHER
02f1175c 4378 printk("cyc:cy_stop ttyC%d\n", info->line); /* */
1da177e4
LT		 4379#endif
4380
02f1175c
JS		 4381 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4382 return;
1da177e4 4383
02f1175c
JS		 4384 cinfo = &cy_card[info->card];
4385 channel = info->line - cinfo->first_line;
4386 if (!IS_CYC_Z(*cinfo)) {
4387 index = cinfo->bus_index;
4388 chip = channel >> 2;
4389 channel &= 0x03;
4390 base_addr = cy_card[info->card].base_addr +
4391 (cy_chip_offset[chip] << index);
1da177e4 4392
02f1175c
JS		 4393 CY_LOCK(info, flags);
4394 cy_writeb(base_addr + (CyCAR << index),
4395 (u_char)(channel & 0x0003)); /* index channel */
4396 cy_writeb(base_addr + (CySRER << index),
db05c3b1 4397 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
02f1175c
JS		 4398 CY_UNLOCK(info, flags);
4399 } else {
096dcfce 4400 /* Nothing to do! */
02f1175c 4401 }
02f1175c 4402} /* cy_stop */
1da177e4 4403
02f1175c 4404static void cy_start(struct tty_struct *tty)
1da177e4 4405{
02f1175c 4406 struct cyclades_card *cinfo;
cab9bdd1 4407 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4408 void __iomem *base_addr;
4409 int chip, channel, index;
4410 unsigned long flags;
1da177e4
LT		 4411
4412#ifdef CY_DEBUG_OTHER
02f1175c 4413 printk("cyc:cy_start ttyC%d\n", info->line); /* */
1da177e4
LT		 4414#endif
4415
02f1175c
JS		 4416 if (serial_paranoia_check(info, tty->name, "cy_start"))
4417 return;
1da177e4 4418
02f1175c
JS		 4419 cinfo = &cy_card[info->card];
4420 channel = info->line - cinfo->first_line;
4421 index = cinfo->bus_index;
4422 if (!IS_CYC_Z(*cinfo)) {
4423 chip = channel >> 2;
4424 channel &= 0x03;
4425 base_addr = cy_card[info->card].base_addr +
4426 (cy_chip_offset[chip] << index);
1da177e4 4427
02f1175c
JS		 4428 CY_LOCK(info, flags);
4429 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4430 cy_writeb(base_addr + (CySRER << index),
db05c3b1 4431 readb(base_addr + (CySRER << index)) | CyTxRdy);
02f1175c
JS		 4432 CY_UNLOCK(info, flags);
4433 } else {
096dcfce 4434 /* Nothing to do! */
02f1175c 4435 }
02f1175c 4436} /* cy_start */
1da177e4 4437
02f1175c 4438static void cy_flush_buffer(struct tty_struct *tty)
1da177e4 4439{
cab9bdd1 4440 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4441 int card, channel, retval;
4442 unsigned long flags;
4443
1da177e4 4444#ifdef CY_DEBUG_IO
02f1175c 4445 printk("cyc:cy_flush_buffer ttyC%d\n", info->line); /* */
1da177e4
LT		 4446#endif
4447
02f1175c
JS		 4448 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4449 return;
1da177e4 4450
02f1175c
JS		 4451 card = info->card;
4452 channel = (info->line) - (cy_card[card].first_line);
1da177e4 4453
1da177e4 4454 CY_LOCK(info, flags);
02f1175c 4455 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1da177e4 4456 CY_UNLOCK(info, flags);
1da177e4 4457
02f1175c
JS		 4458 if (IS_CYC_Z(cy_card[card])) { /* If it is a Z card, flush the on-board
4459 buffers as well */
4460 CY_LOCK(info, flags);
4461 retval =
4462 cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
4463 if (retval != 0) {
4464 printk("cyc: flush_buffer retval on ttyC%d was %x\n",
4465 info->line, retval);
4466 }
4467 CY_UNLOCK(info, flags);
4468 }
4469 tty_wakeup(tty);
02f1175c 4470} /* cy_flush_buffer */
1da177e4
LT		 4471
4472/*
4473 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4474 */
02f1175c 4475static void cy_hangup(struct tty_struct *tty)
1da177e4 4476{
cab9bdd1 4477 struct cyclades_port *info = tty->driver_data;
02f1175c 4478
1da177e4 4479#ifdef CY_DEBUG_OTHER
02f1175c 4480 printk("cyc:cy_hangup ttyC%d\n", info->line); /* */
1da177e4
LT		 4481#endif
4482
02f1175c
JS		 4483 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4484 return;
1da177e4 4485
02f1175c
JS		 4486 cy_flush_buffer(tty);
4487 shutdown(info);
4488 info->event = 0;
4489 info->count = 0;
1da177e4 4490#ifdef CY_DEBUG_COUNT
02f1175c 4491 printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
1da177e4 4492#endif
02f1175c
JS		 4493 info->tty = NULL;
4494 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4495 wake_up_interruptible(&info->open_wait);
4496} /* cy_hangup */
1da177e4
LT		 4497
4498/*
4499 * ---------------------------------------------------------------------
4500 * cy_init() and friends
4501 *
4502 * cy_init() is called at boot-time to initialize the serial driver.
4503 * ---------------------------------------------------------------------
4504 */
4505
0809e267
JS		 4506static void __devinit cy_init_card(struct cyclades_card *cinfo,
4507 const unsigned int board)
4508{
4509 struct cyclades_port *info;
4510 u32 mailbox;
4511 unsigned int nports;
4512 unsigned short chip_number;
4513 int index, port;
4514
4515 if (cinfo->num_chips == -1) { /* Cyclades-Z */
4516 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4517 cinfo->ctl_addr)->mail_box_0);
4518 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4519 cinfo->intr_enabled = 0;
4520 cinfo->nports = 0; /* Will be correctly set later, after
4521 Z FW is loaded */
4522 spin_lock_init(&cinfo->card_lock);
4523 for (port = cinfo->first_line;
4524 port < cinfo->first_line + nports; port++) {
4525 info = &cy_port[port];
4526 info->magic = CYCLADES_MAGIC;
4527 info->type = PORT_STARTECH;
4528 info->card = board;
4529 info->line = port;
4530 info->chip_rev = 0;
4531 info->flags = STD_COM_FLAGS;
4532 info->tty = NULL;
4533 if (mailbox == ZO_V1)
4534 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4535 else
4536 info->xmit_fifo_size =
4537 4 * CYZ_FIFO_SIZE;
4538 info->cor1 = 0;
4539 info->cor2 = 0;
4540 info->cor3 = 0;
4541 info->cor4 = 0;
4542 info->cor5 = 0;
4543 info->tbpr = 0;
4544 info->tco = 0;
4545 info->rbpr = 0;
4546 info->rco = 0;
4547 info->custom_divisor = 0;
4548 info->close_delay = 5 * HZ / 10;
4549 info->closing_wait = CLOSING_WAIT_DELAY;
4550 info->icount.cts = info->icount.dsr =
4551 info->icount.rng = info->icount.dcd = 0;
4552 info->icount.rx = info->icount.tx = 0;
4553 info->icount.frame = info->icount.parity = 0;
4554 info->icount.overrun = info->icount.brk = 0;
4555 info->x_char = 0;
4556 info->event = 0;
4557 info->count = 0;
4558 info->blocked_open = 0;
4559 info->default_threshold = 0;
4560 info->default_timeout = 0;
4561 INIT_WORK(&info->tqueue, do_softint);
4562 init_waitqueue_head(&info->open_wait);
4563 init_waitqueue_head(&info->close_wait);
4564 init_waitqueue_head(&info->shutdown_wait);
4565 init_waitqueue_head(&info->delta_msr_wait);
4566 /* info->session */
4567 /* info->pgrp */
4568 info->read_status_mask = 0;
4569 /* info->timeout */
4570 /* Bentson's vars */
4571 info->jiffies[0] = 0;
4572 info->jiffies[1] = 0;
4573 info->jiffies[2] = 0;
4574 info->rflush_count = 0;
4575#ifdef CONFIG_CYZ_INTR
4576 init_timer(&cyz_rx_full_timer[port]);
4577 cyz_rx_full_timer[port].function = NULL;
4578#endif
4579 }
4580#ifndef CONFIG_CYZ_INTR
4581 if (!timer_pending(&cyz_timerlist)) {
4582 mod_timer(&cyz_timerlist, jiffies + 1);
4583#ifdef CY_PCI_DEBUG
4584 printk("Cyclades-Z polling initialized\n");
4585#endif
4586 }
4587#endif /* CONFIG_CYZ_INTR */
4588
4589 } else { /* Cyclom-Y of some kind */
4590 index = cinfo->bus_index;
4591 spin_lock_init(&cinfo->card_lock);
4592 cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4593 for (port = cinfo->first_line;
4594 port < cinfo->first_line + cinfo->nports; port++) {
4595 info = &cy_port[port];
4596 info->magic = CYCLADES_MAGIC;
4597 info->type = PORT_CIRRUS;
4598 info->card = board;
4599 info->line = port;
4600 info->flags = STD_COM_FLAGS;
4601 info->tty = NULL;
4602 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4603 info->cor1 =
4604 CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4605 info->cor2 = CyETC;
4606 info->cor3 = 0x08; /* _very_ small rcv threshold */
4607 info->cor4 = 0;
4608 info->cor5 = 0;
4609 info->custom_divisor = 0;
4610 info->close_delay = 5 * HZ / 10;
4611 info->closing_wait = CLOSING_WAIT_DELAY;
4612 info->icount.cts = info->icount.dsr =
4613 info->icount.rng = info->icount.dcd = 0;
4614 info->icount.rx = info->icount.tx = 0;
4615 info->icount.frame = info->icount.parity = 0;
4616 info->icount.overrun = info->icount.brk = 0;
4617 chip_number = (port - cinfo->first_line) / 4;
4618 if ((info->chip_rev =
4619 readb(cinfo->base_addr +
4620 (cy_chip_offset[chip_number] <<
4621 index) + (CyGFRCR << index))) >=
4622 CD1400_REV_J) {
4623 /* It is a CD1400 rev. J or later */
4624 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4625 info->tco = baud_co_60[13]; /* Tx CO */
4626 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4627 info->rco = baud_co_60[13]; /* Rx CO */
4628 info->rflow = 0;
4629 info->rtsdtr_inv = 1;
4630 } else {
4631 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4632 info->tco = baud_co_25[13]; /* Tx CO */
4633 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4634 info->rco = baud_co_25[13]; /* Rx CO */
4635 info->rflow = 0;
4636 info->rtsdtr_inv = 0;
4637 }
4638 info->x_char = 0;
4639 info->event = 0;
4640 info->count = 0;
4641 info->blocked_open = 0;
4642 info->default_threshold = 0;
4643 info->default_timeout = 0;
4644 INIT_WORK(&info->tqueue, do_softint);
4645 init_waitqueue_head(&info->open_wait);
4646 init_waitqueue_head(&info->close_wait);
4647 init_waitqueue_head(&info->shutdown_wait);
4648 init_waitqueue_head(&info->delta_msr_wait);
4649 /* info->session */
4650 /* info->pgrp */
4651 info->read_status_mask =
4652 CyTIMEOUT | CySPECHAR | CyBREAK
4653 | CyPARITY | CyFRAME | CyOVERRUN;
4654 /* info->timeout */
4655 }
4656 }
4657}
4658
1da177e4
LT		 4659/* initialize chips on Cyclom-Y card -- return number of valid
4660 chips (which is number of ports/4) */
4661static unsigned short __init
02f1175c 4662cyy_init_card(void __iomem * true_base_addr, int index)
1da177e4 4663{
02f1175c
JS		 4664 unsigned int chip_number;
4665 void __iomem *base_addr;
4666
4667 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4668 /* Cy_HwReset is 0x1400 */
4669 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4670 /* Cy_ClrIntr is 0x1800 */
4671 udelay(500L);
4672
4673 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4674 base_addr =
4675 true_base_addr + (cy_chip_offset[chip_number] << index);
4676 mdelay(1);
db05c3b1 4677 if (readb(base_addr + (CyCCR << index)) != 0x00) {
02f1175c
JS		 4678 /*************
4679 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4680 chip_number, (unsigned long)base_addr);
4681 *************/
4682 return chip_number;
4683 }
4684
4685 cy_writeb(base_addr + (CyGFRCR << index), 0);
4686 udelay(10L);
4687
4688 /* The Cyclom-16Y does not decode address bit 9 and therefore
4689 cannot distinguish between references to chip 0 and a non-
4690 existent chip 4. If the preceding clearing of the supposed
4691 chip 4 GFRCR register appears at chip 0, there is no chip 4
4692 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4693 */
db05c3b1 4694 if (chip_number == 4 && readb(true_base_addr +
02f1175c
JS		 4695 (cy_chip_offset[0] << index) +
4696 (CyGFRCR << index)) == 0) {
4697 return chip_number;
4698 }
4699
4700 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4701 mdelay(1);
4702
db05c3b1 4703 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
02f1175c
JS		 4704 /*
4705 printk(" chip #%d at %#6lx is not responding ",
4706 chip_number, (unsigned long)base_addr);
4707 printk("(GFRCR stayed 0)\n",
4708 */
4709 return chip_number;
4710 }
db05c3b1 4711 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
02f1175c
JS		 4712 0x40) {
4713 /*
4714 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4715 "%#2x)\n",
4716 chip_number, (unsigned long)base_addr,
4717 base_addr[CyGFRCR<<index]);
4718 */
4719 return chip_number;
4720 }
4721 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
db05c3b1 4722 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
02f1175c
JS		 4723 /* It is a CD1400 rev. J or later */
4724 /* Impossible to reach 5ms with this chip.
4725 Changed to 2ms instead (f = 500 Hz). */
4726 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4727 } else {
4728 /* f = 200 Hz */
4729 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4730 }
1da177e4 4731
02f1175c
JS		 4732 /*
4733 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4734 chip_number, (unsigned long)base_addr,
db05c3b1 4735 readb(base_addr+(CyGFRCR<<index)));
02f1175c
JS		 4736 */
4737 }
4738 return chip_number;
4739} /* cyy_init_card */
1da177e4
LT		 4740
4741/*
4742 * ---------------------------------------------------------------------
4743 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4744 * sets global variables and return the number of ISA boards found.
4745 * ---------------------------------------------------------------------
4746 */
02f1175c 4747static int __init cy_detect_isa(void)
1da177e4
LT		 4748{
4749#ifdef CONFIG_ISA
02f1175c
JS		 4750 unsigned short cy_isa_irq, nboard;
4751 void __iomem *cy_isa_address;
4752 unsigned short i, j, cy_isa_nchan;
1da177e4 4753#ifdef MODULE
02f1175c 4754 int isparam = 0;
1da177e4
LT		 4755#endif
4756
02f1175c 4757 nboard = 0;
1da177e4
LT		 4758
4759#ifdef MODULE
4760 /* Check for module parameters */
02f1175c
JS		 4761 for (i = 0; i < NR_CARDS; i++) {
4762 if (maddr[i] || i) {
4763 isparam = 1;
4764 cy_isa_addresses[i] = maddr[i];
4765 }
4766 if (!maddr[i])
4767 break;
1da177e4
LT		 4768 }
4769#endif
4770
02f1175c
JS		 4771 /* scan the address table probing for Cyclom-Y/ISA boards */
4772 for (i = 0; i < NR_ISA_ADDRS; i++) {
4773 unsigned int isa_address = cy_isa_addresses[i];
4774 if (isa_address == 0x0000) {
096dcfce 4775 return nboard;
02f1175c 4776 }
1da177e4 4777
02f1175c 4778 /* probe for CD1400... */
1da177e4 4779 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
02f1175c
JS		 4780 cy_isa_nchan = CyPORTS_PER_CHIP *
4781 cyy_init_card(cy_isa_address, 0);
4782 if (cy_isa_nchan == 0) {
4783 continue;
4784 }
1da177e4
LT		 4785#ifdef MODULE
4786 if (isparam && irq[i])
02f1175c 4787 cy_isa_irq = irq[i];
1da177e4
LT		 4788 else
4789#endif
02f1175c
JS		 4790 /* find out the board's irq by probing */
4791 cy_isa_irq = detect_isa_irq(cy_isa_address);
4792 if (cy_isa_irq == 0) {
4793 printk("Cyclom-Y/ISA found at 0x%lx ",
4794 (unsigned long)cy_isa_address);
4795 printk("but the IRQ could not be detected.\n");
4796 continue;
4797 }
4798
4799 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4800 printk("Cyclom-Y/ISA found at 0x%lx ",
4801 (unsigned long)cy_isa_address);
4802 printk("but no more channels are available.\n");
4803 printk("Change NR_PORTS in cyclades.c and recompile "
4804 "kernel.\n");
096dcfce 4805 return nboard;
02f1175c
JS		 4806 }
4807 /* fill the next cy_card structure available */
4808 for (j = 0; j < NR_CARDS; j++) {
4809 if (cy_card[j].base_addr == 0)
4810 break;
4811 }
4812 if (j == NR_CARDS) { /* no more cy_cards available */
4813 printk("Cyclom-Y/ISA found at 0x%lx ",
4814 (unsigned long)cy_isa_address);
4815 printk("but no more cards can be used .\n");
4816 printk("Change NR_CARDS in cyclades.c and recompile "
4817 "kernel.\n");
096dcfce 4818 return nboard;
02f1175c
JS		 4819 }
4820
4821 /* allocate IRQ */
4822 if (request_irq(cy_isa_irq, cyy_interrupt,
4823 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4824 printk("Cyclom-Y/ISA found at 0x%lx ",
4825 (unsigned long)cy_isa_address);
4826 printk("but could not allocate IRQ#%d.\n", cy_isa_irq);
096dcfce 4827 return nboard;
02f1175c
JS		 4828 }
4829
4830 /* set cy_card */
4831 cy_card[j].base_addr = cy_isa_address;
4832 cy_card[j].ctl_addr = NULL;
4833 cy_card[j].irq = (int)cy_isa_irq;
4834 cy_card[j].bus_index = 0;
4835 cy_card[j].first_line = cy_next_channel;
4836 cy_card[j].num_chips = cy_isa_nchan / 4;
f3851e73 4837 cy_init_card(&cy_card[j], j);
02f1175c
JS		 4838 nboard++;
4839
4840 /* print message */
4841 printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
4842 j + 1, (unsigned long)cy_isa_address,
4843 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4844 cy_isa_irq);
4845 printk("%d channels starting from port %d.\n",
4846 cy_isa_nchan, cy_next_channel);
4847 cy_next_channel += cy_isa_nchan;
4848 }
096dcfce 4849 return nboard;
1da177e4 4850#else
096dcfce 4851 return 0;
02f1175c
JS		 4852#endif /* CONFIG_ISA */
4853} /* cy_detect_isa */
1da177e4 4854
58936d8d
JS		 4855#ifdef CONFIG_PCI
4856static void __devinit plx_init(void __iomem * addr, __u32 initctl)
1da177e4 4857{
02f1175c 4858 /* Reset PLX */
db05c3b1 4859 cy_writel(addr + initctl, readl(addr + initctl) | 0x40000000);
02f1175c 4860 udelay(100L);
db05c3b1 4861 cy_writel(addr + initctl, readl(addr + initctl) & ~0x40000000);
02f1175c
JS		 4862
4863 /* Reload Config. Registers from EEPROM */
db05c3b1 4864 cy_writel(addr + initctl, readl(addr + initctl) | 0x20000000);
02f1175c 4865 udelay(100L);
db05c3b1 4866 cy_writel(addr + initctl, readl(addr + initctl) & ~0x20000000);
1da177e4
LT		 4867}
4868
d407c781
JS		 4869static int __devinit cy_init_Ze(unsigned long cy_pci_phys0,
4870 unsigned long cy_pci_phys2,
4871 struct RUNTIME_9060 __iomem *cy_pci_addr0,
2b1da41f 4872 int cy_pci_irq, struct pci_dev *pdev)
d407c781 4873{
2b1da41f 4874 void __iomem *cy_pci_addr2;
d407c781
JS		 4875 unsigned int j;
4876 unsigned short cy_pci_nchan;
4877
2b1da41f
JS		 4878 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ze_win);
4879
d407c781
JS		 4880 readl(&cy_pci_addr0->mail_box_0);
4881#ifdef CY_PCI_DEBUG
4882 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
4883 (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
4884 printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not "
4885 "loaded\n");
4886#endif
4887 /* This must be the new Cyclades-Ze/PCI. */
4888 cy_pci_nchan = ZE_V1_NPORTS;
4889
4890 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4891 printk("Cyclades-Ze/PCI found at 0x%lx but no channels "
4892 "are available.\nChange NR_PORTS in cyclades.c "
4893 "and recompile kernel.\n",
4894 (ulong) cy_pci_phys2);
4895 return -EIO;
4896 }
4897
4898 /* fill the next cy_card structure available */
4899 for (j = 0; j < NR_CARDS; j++) {
4900 if (cy_card[j].base_addr == 0)
4901 break;
4902 }
4903 if (j == NR_CARDS) { /* no more cy_cards available */
4904 printk("Cyclades-Ze/PCI found at 0x%lx but no more "
4905 "cards can be used.\nChange NR_CARDS in "
4906 "cyclades.c and recompile kernel.\n",
4907 (ulong) cy_pci_phys2);
4908 return -EIO;
4909 }
4910#ifdef CONFIG_CYZ_INTR
4911 /* allocate IRQ only if board has an IRQ */
4912 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
4913 if (request_irq(cy_pci_irq, cyz_interrupt,
4914 IRQF_SHARED, "Cyclades-Z",
4915 &cy_card[j])) {
4916 printk("Cyclom-Ze/PCI found at 0x%lx ",
4917 (ulong) cy_pci_phys2);
4918 printk("but could not allocate IRQ%d.\n",
4919 cy_pci_irq);
4920 return -EIO;
4921 }
4922 }
4923#endif /* CONFIG_CYZ_INTR */
4924
4925 /* set cy_card */
4926 cy_card[j].base_phys = cy_pci_phys2;
4927 cy_card[j].ctl_phys = cy_pci_phys0;
4928 cy_card[j].base_addr = cy_pci_addr2;
4929 cy_card[j].ctl_addr = cy_pci_addr0;
4930 cy_card[j].irq = (int)cy_pci_irq;
4931 cy_card[j].bus_index = 1;
4932 cy_card[j].first_line = cy_next_channel;
4933 cy_card[j].num_chips = -1;
4934 cy_card[j].pdev = pdev;
f3851e73 4935 cy_init_card(&cy_card[j], j);
38d09093 4936 pci_set_drvdata(pdev, &cy_card[j]);
d407c781
JS		 4937
4938 /* print message */
4939#ifdef CONFIG_CYZ_INTR
4940 /* don't report IRQ if board is no IRQ */
4941 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
4942 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4943 j + 1, (ulong) cy_pci_phys2,
4944 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1),
4945 (int)cy_pci_irq);
4946 else
4947#endif /* CONFIG_CYZ_INTR */
4948 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
4949 j + 1, (ulong) cy_pci_phys2,
4950 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1));
4951
4952 printk("%d channels starting from port %d.\n",
4953 cy_pci_nchan, cy_next_channel);
4954 cy_next_channel += cy_pci_nchan;
4955
4956 return 0;
4957}
4958
58936d8d
JS		 4959static int __devinit cy_pci_probe(struct pci_dev *pdev,
4960 const struct pci_device_id *ent)
1da177e4 4961{
02f1175c 4962 unsigned char cyy_rev_id;
58936d8d
JS		 4963 unsigned char cy_pci_irq;
4964 __u32 cy_pci_phys0, cy_pci_phys2, mailbox;
02f1175c 4965 void __iomem *cy_pci_addr0, *cy_pci_addr2;
58936d8d
JS		 4966 unsigned int device_id;
4967 unsigned short j, cy_pci_nchan, plx_ver;
d407c781 4968 int retval;
02f1175c 4969
58936d8d
JS		 4970 retval = pci_enable_device(pdev);
4971 if (retval) {
4972 dev_err(&pdev->dev, "cannot enable device\n");
4973 return retval;
4974 }
1da177e4 4975
58936d8d
JS		 4976 /* read PCI configuration area */
4977 cy_pci_irq = pdev->irq;
4978 cy_pci_phys0 = pci_resource_start(pdev, 0);
4979 cy_pci_phys2 = pci_resource_start(pdev, 2);
4980 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
1da177e4 4981
58936d8d 4982 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
1da177e4 4983
58936d8d
JS		 4984 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4985 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4986#ifdef CY_PCI_DEBUG
4987 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4988 pdev->bus->number, pdev->devfn);
4989 printk("rev_id=%d) IRQ%d\n",
4990 cyy_rev_id, (int)cy_pci_irq);
4991 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
4992 "ctladdr=0x%lx\n",
4993 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4994#endif
1da177e4 4995
58936d8d
JS		 4996 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4997 printk(" Warning: PCI I/O bit incorrectly "
4998 "set. Ignoring it...\n");
4999 pdev->resource[2].flags &= ~IORESOURCE_IO;
5000 }
1da177e4 5001
58936d8d
JS		 5002 /* Although we don't use this I/O region, we should
5003 request it from the kernel anyway, to avoid problems
5004 with other drivers accessing it. */
5005 retval = pci_request_regions(pdev, "Cyclom-Y");
5006 if (retval) {
5007 printk(KERN_ERR "cyclades: failed to reserve "
5008 "PCI resources\n");
5009 return retval;
5010 }
5011#if defined(__alpha__)
5012 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
02f1175c
JS		 5013 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
5014 pdev->bus->number, pdev->devfn);
5015 printk("rev_id=%d) IRQ%d\n",
5016 cyy_rev_id, (int)cy_pci_irq);
5017 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
5018 "ctladdr=0x%lx\n",
58936d8d
JS		 5019 (ulong)cy_pci_phys2,
5020 (ulong)cy_pci_phys0);
5021 printk("Cyclom-Y/PCI not supported for low "
5022 "addresses in Alpha systems.\n");
5023 return -EIO;
5024 }
1da177e4 5025#endif
58936d8d
JS		 5026 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
5027 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
1da177e4
LT		 5028
5029#ifdef CY_PCI_DEBUG
58936d8d
JS		 5030 printk("Cyclom-Y/PCI: relocate winaddr=0x%lx "
5031 "ctladdr=0x%lx\n",
5032 (u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
1da177e4 5033#endif
58936d8d
JS		 5034 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
5035 cyy_init_card(cy_pci_addr2, 1));
5036 if (cy_pci_nchan == 0) {
5037 printk("Cyclom-Y PCI host card with ");
5038 printk("no Serial-Modules at 0x%lx.\n",
5039 (ulong) cy_pci_phys2);
5040 return -EIO;
5041 }
5042 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5043 printk("Cyclom-Y/PCI found at 0x%lx ",
5044 (ulong) cy_pci_phys2);
5045 printk("but no channels are available.\n");
5046 printk("Change NR_PORTS in cyclades.c and "
5047 "recompile kernel.\n");
5048 return -EIO;
5049 }
5050 /* fill the next cy_card structure available */
5051 for (j = 0; j < NR_CARDS; j++) {
5052 if (cy_card[j].base_addr == 0)
02f1175c 5053 break;
58936d8d
JS		 5054 }
5055 if (j == NR_CARDS) { /* no more cy_cards available */
5056 printk("Cyclom-Y/PCI found at 0x%lx ",
5057 (ulong) cy_pci_phys2);
5058 printk("but no more cards can be used.\n");
5059 printk("Change NR_CARDS in cyclades.c and "
5060 "recompile kernel.\n");
5061 return -EIO;
5062 }
02f1175c 5063
58936d8d
JS		 5064 /* allocate IRQ */
5065 retval = request_irq(cy_pci_irq, cyy_interrupt,
5066 IRQF_SHARED, "Cyclom-Y", &cy_card[j]);
5067 if (retval) {
5068 printk("Cyclom-Y/PCI found at 0x%lx ",
5069 (ulong) cy_pci_phys2);
5070 printk("but could not allocate IRQ%d.\n",
5071 cy_pci_irq);
5072 return retval;
5073 }
02f1175c 5074
58936d8d
JS		 5075 /* set cy_card */
5076 cy_card[j].base_phys = (ulong) cy_pci_phys2;
5077 cy_card[j].ctl_phys = (ulong) cy_pci_phys0;
5078 cy_card[j].base_addr = cy_pci_addr2;
5079 cy_card[j].ctl_addr = cy_pci_addr0;
5080 cy_card[j].irq = (int)cy_pci_irq;
5081 cy_card[j].bus_index = 1;
5082 cy_card[j].first_line = cy_next_channel;
5083 cy_card[j].num_chips = cy_pci_nchan / 4;
5084 cy_card[j].pdev = pdev;
f3851e73 5085 cy_init_card(&cy_card[j], j);
58936d8d 5086 pci_set_drvdata(pdev, &cy_card[j]);
02f1175c 5087
58936d8d
JS		 5088 /* enable interrupts in the PCI interface */
5089 plx_ver = readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
5090 switch (plx_ver) {
5091 case PLX_9050:
5092
5093 cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
02f1175c 5094 break;
02f1175c 5095
58936d8d
JS		 5096 case PLX_9060:
5097 case PLX_9080:
5098 default: /* Old boards, use PLX_9060 */
02f1175c
JS		 5099
5100 plx_init(cy_pci_addr0, 0x6c);
58936d8d
JS		 5101 /* For some yet unknown reason, once the PLX9060 reloads
5102 the EEPROM, the IRQ is lost and, thus, we have to
5103 re-write it to the PCI config. registers.
5104 This will remain here until we find a permanent
5105 fix. */
02f1175c 5106 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
58936d8d 5107 cy_pci_irq);
02f1175c 5108
58936d8d
JS		 5109 cy_writew(cy_pci_addr0 + 0x68,
5110 readw(cy_pci_addr0 + 0x68) | 0x0900);
5111 break;
5112 }
02f1175c 5113
58936d8d
JS		 5114 /* print message */
5115 printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
5116 j + 1, (ulong)cy_pci_phys2,
5117 (ulong) (cy_pci_phys2 + CyPCI_Ywin - 1),
5118 (int)cy_pci_irq);
5119 printk("%d channels starting from port %d.\n",
5120 cy_pci_nchan, cy_next_channel);
1da177e4 5121
58936d8d
JS		 5122 cy_next_channel += cy_pci_nchan;
5123 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
5124 /* print message */
5125 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
5126 pdev->bus->number, pdev->devfn);
5127 printk("rev_id=%d) IRQ%d\n",
5128 cyy_rev_id, (int)cy_pci_irq);
5129 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
5130 "ctladdr=0x%lx\n",
5131 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
5132 printk("Cyclades-Z/PCI not supported for low "
5133 "addresses\n");
5134 return -EIO;
5135 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
5136#ifdef CY_PCI_DEBUG
5137 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
5138 pdev->bus->number, pdev->devfn);
5139 printk("rev_id=%d) IRQ%d\n",
5140 cyy_rev_id, (int)cy_pci_irq);
5141 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
5142 "ctladdr=0x%lx\n",
5143 (ulong) cy_pci_phys2, (ulong) cy_pci_phys0);
5144#endif
5145 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
5146
5147 /* Disable interrupts on the PLX before resetting it */
5148 cy_writew(cy_pci_addr0 + 0x68,
5149 readw(cy_pci_addr0 + 0x68) & ~0x0900);
5150
5151 plx_init(cy_pci_addr0, 0x6c);
5152 /* For some yet unknown reason, once the PLX9060 reloads
5153 the EEPROM, the IRQ is lost and, thus, we have to
5154 re-write it to the PCI config. registers.
5155 This will remain here until we find a permanent
5156 fix. */
5157 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
5158 cy_pci_irq);
02f1175c 5159
58936d8d
JS		 5160 mailbox = (__u32)readl(&((struct RUNTIME_9060 __iomem *)
5161 cy_pci_addr0)->mail_box_0);
5162
5163 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
5164 printk(" Warning: PCI I/O bit incorrectly "
5165 "set. Ignoring it...\n");
5166 pdev->resource[2].flags &= ~IORESOURCE_IO;
5167 }
5168
5169 /* Although we don't use this I/O region, we should
5170 request it from the kernel anyway, to avoid problems
5171 with other drivers accessing it. */
5172 retval = pci_request_regions(pdev, "Cyclades-Z");
5173 if (retval) {
5174 printk(KERN_ERR "cyclades: failed to reserve "
5175 "PCI resources\n");
5176 return retval;
5177 }
5178
5179 if (mailbox == ZE_V1) {
5180 retval = cy_init_Ze(cy_pci_phys0, cy_pci_phys2,
5181 cy_pci_addr0, cy_pci_irq, pdev);
5182 return retval;
5183 } else {
5184 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Zwin);
5185 }
1da177e4
LT		 5186
5187#ifdef CY_PCI_DEBUG
58936d8d
JS		 5188 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx "
5189 "ctladdr=0x%lx\n",
5190 (ulong) cy_pci_addr2, (ulong) cy_pci_addr0);
5191 if (mailbox == ZO_V1) {
5192 cy_writel(&((struct RUNTIME_9060 *)
5193 (cy_pci_addr0))->loc_addr_base,
5194 WIN_CREG);
5195 printk("Cyclades-8Zo/PCI: FPGA id %lx, ver "
5196 "%lx\n", (ulong) (0xff &
5197 readl(&((struct CUSTOM_REG *)
5198 (cy_pci_addr2))->fpga_id)),
5199 (ulong)(0xff &
5200 readl(&((struct CUSTOM_REG *)
5201 (cy_pci_addr2))->
5202 fpga_version)));
5203 cy_writel(&((struct RUNTIME_9060 *)
5204 (cy_pci_addr0))->loc_addr_base,
5205 WIN_RAM);
5206 } else {
5207 printk("Cyclades-Z/PCI: New Cyclades-Z board. "
5208 "FPGA not loaded\n");
5209 }
1da177e4 5210#endif
58936d8d
JS		 5211 /* The following clears the firmware id word. This
5212 ensures that the driver will not attempt to talk to
5213 the board until it has been properly initialized.
5214 */
5215 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5216 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
5217
5218 /* This must be a Cyclades-8Zo/PCI. The extendable
5219 version will have a different device_id and will
5220 be allocated its maximum number of ports. */
5221 cy_pci_nchan = 8;
5222
5223 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5224 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5225 "no channels are available.\nChange "
5226 "NR_PORTS in cyclades.c and recompile "
5227 "kernel.\n", (ulong)cy_pci_phys2);
5228 return -EIO;
5229 }
1da177e4 5230
58936d8d
JS		 5231 /* fill the next cy_card structure available */
5232 for (j = 0; j < NR_CARDS; j++) {
5233 if (cy_card[j].base_addr == 0)
5234 break;
5235 }
5236 if (j == NR_CARDS) { /* no more cy_cards available */
5237 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5238 "no more cards can be used.\nChange "
5239 "NR_CARDS in cyclades.c and recompile "
5240 "kernel.\n", (ulong)cy_pci_phys2);
5241 return -EIO;
5242 }
02f1175c 5243#ifdef CONFIG_CYZ_INTR
58936d8d
JS		 5244 /* allocate IRQ only if board has an IRQ */
5245 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5246 retval = request_irq(cy_pci_irq, cyz_interrupt,
5247 IRQF_SHARED, "Cyclades-Z",
5248 &cy_card[j]);
5249 if (retval) {
5250 printk("Cyclom-8Zo/PCI found at 0x%lx "
5251 "but could not allocate "
5252 "IRQ%d.\n", (ulong)cy_pci_phys2,
5253 cy_pci_irq);
5254 return retval;
02f1175c 5255 }
58936d8d 5256 }
02f1175c
JS		 5257#endif /* CONFIG_CYZ_INTR */
5258
58936d8d
JS		 5259 /* set cy_card */
5260 cy_card[j].base_phys = cy_pci_phys2;
5261 cy_card[j].ctl_phys = cy_pci_phys0;
5262 cy_card[j].base_addr = cy_pci_addr2;
5263 cy_card[j].ctl_addr = cy_pci_addr0;
5264 cy_card[j].irq = (int)cy_pci_irq;
5265 cy_card[j].bus_index = 1;
5266 cy_card[j].first_line = cy_next_channel;
5267 cy_card[j].num_chips = -1;
5268 cy_card[j].pdev = pdev;
f3851e73 5269 cy_init_card(&cy_card[j], j);
58936d8d
JS		 5270 pci_set_drvdata(pdev, &cy_card[j]);
5271
5272 /* print message */
1da177e4 5273#ifdef CONFIG_CYZ_INTR
58936d8d
JS		 5274 /* don't report IRQ if board is no IRQ */
5275 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5276 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, "
5277 "IRQ%d, ", j + 1, (ulong)cy_pci_phys2,
5278 (ulong) (cy_pci_phys2 + CyPCI_Zwin - 1),
5279 (int)cy_pci_irq);
5280 else
02f1175c 5281#endif /* CONFIG_CYZ_INTR */
58936d8d
JS		 5282 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
5283 j + 1, (ulong)cy_pci_phys2,
5284 (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));
5285
5286 printk("%d channels starting from port %d.\n",
5287 cy_pci_nchan, cy_next_channel);
5288 cy_next_channel += cy_pci_nchan;
5289 }
5290
5291 return 0;
5292}
5293#endif
5294
5295/*
5296 * ---------------------------------------------------------------------
5297 * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
5298 * sets global variables and return the number of PCI boards found.
5299 * ---------------------------------------------------------------------
5300 */
5301static int __init cy_detect_pci(void)
5302{
5303#ifdef CONFIG_PCI
5304 struct pci_dev *pdev = NULL;
5305 unsigned int i, device_id, dev_index = 0;
02f1175c 5306
58936d8d
JS		 5307 for (i = 0; i < NR_CARDS; i++) {
5308 /* look for a Cyclades card by vendor and device id */
5309 while ((device_id = cy_pci_dev_id[dev_index].device) != 0) {
5310 if ((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
5311 device_id, pdev)) == NULL) {
5312 dev_index++; /* try next device id */
5313 } else {
5314 break; /* found a board */
5315 }
1da177e4 5316 }
58936d8d
JS		 5317
5318 if (device_id == 0)
5319 break;
5320
5321 i -= !!cy_pci_probe(pdev, &cy_pci_dev_id[dev_index]);
02f1175c 5322 }
1da177e4 5323
096dcfce 5324 return i;
1da177e4 5325#else
096dcfce 5326 return 0;
02f1175c
JS		 5327#endif /* ifdef CONFIG_PCI */
5328} /* cy_detect_pci */
1da177e4 5329
38d09093
JS		 5330static void __devexit cy_pci_release(struct pci_dev *pdev)
5331{
5332#ifdef CONFIG_PCI
5333 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
f3851e73 5334 unsigned int i;
38d09093
JS		 5335
5336 pci_iounmap(pdev, cinfo->base_addr);
5337 if (cinfo->ctl_addr)
5338 pci_iounmap(pdev, cinfo->ctl_addr);
5339 if (cinfo->irq
5340#ifndef CONFIG_CYZ_INTR
5341 && cinfo->num_chips != -1 /* not a Z card */
5342#endif /* CONFIG_CYZ_INTR */
5343 )
5344 free_irq(cinfo->irq, cinfo);
5345 pci_release_regions(pdev);
5346
5347 cinfo->base_addr = NULL;
f3851e73
JS		 5348 for (i = cinfo->first_line; i < cinfo->first_line + cinfo->nports; i++){
5349 cy_port[i].line = -1;
5350 cy_port[i].magic = -1;
5351 }
38d09093
JS		 5352#endif
5353}
5354
1da177e4
LT		 5355/*
5356 * This routine prints out the appropriate serial driver version number
5357 * and identifies which options were configured into this driver.
5358 */
02f1175c 5359static inline void show_version(void)
1da177e4 5360{
096dcfce 5361 printk("Cyclades driver " CY_VERSION "\n");
02f1175c
JS		 5362 printk(" built %s %s\n", __DATE__, __TIME__);
5363} /* show_version */
5364
5365static int
1da177e4 5366cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
02f1175c 5367 int *eof, void *data)
1da177e4 5368{
02f1175c
JS		 5369 struct cyclades_port *info;
5370 int i;
5371 int len = 0;
5372 off_t begin = 0;
5373 off_t pos = 0;
5374 int size;
5375 __u32 cur_jifs = jiffies;
5376
5377 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5378 "IdleIn Overruns Ldisc\n");
5379
5380 pos += size;
1da177e4 5381 len += size;
1da177e4 5382
02f1175c
JS		 5383 /* Output one line for each known port */
5384 for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5385 info = &cy_port[i];
5386
5387 if (info->count)
5388 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5389 "%8lu %9lu %6ld\n", info->line,
096dcfce 5390 (cur_jifs - info->idle_stats.in_use) / HZ,
02f1175c 5391 info->idle_stats.xmit_bytes,
096dcfce 5392 (cur_jifs - info->idle_stats.xmit_idle) / HZ,
02f1175c 5393 info->idle_stats.recv_bytes,
096dcfce 5394 (cur_jifs - info->idle_stats.recv_idle) / HZ,
02f1175c
JS		 5395 info->idle_stats.overruns,
5396 (long)info->tty->ldisc.num);
5397 else
5398 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5399 "%8lu %9lu %6ld\n",
5400 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5401 len += size;
5402 pos = begin + len;
5403
5404 if (pos < offset) {
5405 len = 0;
5406 begin = pos;
5407 }
5408 if (pos > offset + length)
5409 goto done;
1da177e4 5410 }
02f1175c 5411 *eof = 1;
1da177e4 5412done:
02f1175c
JS		 5413 *start = buf + (offset - begin); /* Start of wanted data */
5414 len -= (offset - begin); /* Start slop */
5415 if (len > length)
5416 len = length; /* Ending slop */
5417 if (len < 0)
5418 len = 0;
5419 return len;
1da177e4
LT		 5420}
5421
5422/* The serial driver boot-time initialization code!
5423 Hardware I/O ports are mapped to character special devices on a
5424 first found, first allocated manner. That is, this code searches
5425 for Cyclom cards in the system. As each is found, it is probed
5426 to discover how many chips (and thus how many ports) are present.
5427 These ports are mapped to the tty ports 32 and upward in monotonic
5428 fashion. If an 8-port card is replaced with a 16-port card, the
5429 port mapping on a following card will shift.
5430
5431 This approach is different from what is used in the other serial
5432 device driver because the Cyclom is more properly a multiplexer,
5433 not just an aggregation of serial ports on one card.
5434
5435 If there are more cards with more ports than have been
5436 statically allocated above, a warning is printed and the
5437 extra ports are ignored.
5438 */
5439
b68e31d0 5440static const struct tty_operations cy_ops = {
02f1175c
JS		 5441 .open = cy_open,
5442 .close = cy_close,
5443 .write = cy_write,
5444 .put_char = cy_put_char,
5445 .flush_chars = cy_flush_chars,
5446 .write_room = cy_write_room,
5447 .chars_in_buffer = cy_chars_in_buffer,
5448 .flush_buffer = cy_flush_buffer,
5449 .ioctl = cy_ioctl,
5450 .throttle = cy_throttle,
5451 .unthrottle = cy_unthrottle,
5452 .set_termios = cy_set_termios,
5453 .stop = cy_stop,
5454 .start = cy_start,
5455 .hangup = cy_hangup,
5456 .break_ctl = cy_break,
5457 .wait_until_sent = cy_wait_until_sent,
5458 .read_proc = cyclades_get_proc_info,
5459 .tiocmget = cy_tiocmget,
5460 .tiocmset = cy_tiocmset,
1da177e4
LT		 5461};
5462
02f1175c 5463static int __init cy_init(void)
1da177e4 5464{
0809e267 5465 unsigned int i;
02f1175c
JS		 5466
5467 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5468 if (!cy_serial_driver)
5469 return -ENOMEM;
5470 show_version();
5471
5472 /* Initialize the tty_driver structure */
5473
5474 cy_serial_driver->owner = THIS_MODULE;
5475 cy_serial_driver->driver_name = "cyclades";
5476 cy_serial_driver->name = "ttyC";
5477 cy_serial_driver->major = CYCLADES_MAJOR;
5478 cy_serial_driver->minor_start = 0;
5479 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5480 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5481 cy_serial_driver->init_termios = tty_std_termios;
5482 cy_serial_driver->init_termios.c_cflag =
5483 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5484 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
5485 tty_set_operations(cy_serial_driver, &cy_ops);
5486
5487 if (tty_register_driver(cy_serial_driver))
5488 panic("Couldn't register Cyclades serial driver\n");
5489
5490 for (i = 0; i < NR_CARDS; i++) {
5491 /* base_addr=0 indicates board not found */
5492 cy_card[i].base_addr = NULL;
5493 }
5494
f3851e73
JS		 5495 /* invalidate remaining cy_port structures */
5496 for (i = 0; i < NR_PORTS; i++) {
5497 cy_port[i].line = -1;
5498 cy_port[i].magic = -1;
5499 }
5500
02f1175c
JS		 5501 /* the code below is responsible to find the boards. Each different
5502 type of board has its own detection routine. If a board is found,
5503 the next cy_card structure available is set by the detection
5504 routine. These functions are responsible for checking the
5505 availability of cy_card and cy_port data structures and updating
5506 the cy_next_channel. */
5507
5508 /* look for isa boards */
5509 cy_isa_nboard = cy_detect_isa();
5510
5511 /* look for pci boards */
5512 cy_pci_nboard = cy_detect_pci();
5513
5514 cy_nboard = cy_isa_nboard + cy_pci_nboard;
5515
02f1175c 5516 return 0;
02f1175c 5517} /* cy_init */
1da177e4 5518
02f1175c 5519static void __exit cy_cleanup_module(void)
1da177e4 5520{
02f1175c 5521 int i, e1;
1da177e4
LT		 5522
5523#ifndef CONFIG_CYZ_INTR
b7050906 5524 del_timer_sync(&cyz_timerlist);
1da177e4
LT		 5525#endif /* CONFIG_CYZ_INTR */
5526
02f1175c
JS		 5527 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5528 printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
5529 e1);
1da177e4 5530
02f1175c 5531 put_tty_driver(cy_serial_driver);
1da177e4 5532
02f1175c
JS		 5533 for (i = 0; i < NR_CARDS; i++) {
5534 if (cy_card[i].base_addr) {
38d09093
JS		 5535 if (cy_card[i].pdev) {
5536 cy_pci_release(cy_card[i].pdev);
5537 continue;
5538 }
02f1175c
JS		 5539 iounmap(cy_card[i].base_addr);
5540 if (cy_card[i].ctl_addr)
5541 iounmap(cy_card[i].ctl_addr);
5542 if (cy_card[i].irq
1da177e4 5543#ifndef CONFIG_CYZ_INTR
02f1175c 5544 && cy_card[i].num_chips != -1 /* not a Z card */
1da177e4 5545#endif /* CONFIG_CYZ_INTR */
02f1175c
JS		 5546 )
5547 free_irq(cy_card[i].irq, &cy_card[i]);
02f1175c
JS		 5548 }
5549 }
1da177e4
LT		 5550} /* cy_cleanup_module */
5551
5552module_init(cy_init);
5553module_exit(cy_cleanup_module);
5554
5555MODULE_LICENSE("GPL");
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