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Char: cyclades, cy_readX/writeX cleanup
[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
854static int cyz_timeron = 0;
8d06afab 855static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
1da177e4 856
02f1175c 857#else /* CONFIG_CYZ_INTR */
1da177e4
LT		 858static void cyz_rx_restart(unsigned long);
859static struct timer_list cyz_rx_full_timer[NR_PORTS];
02f1175c 860#endif /* CONFIG_CYZ_INTR */
1da177e4 861
02f1175c
JS		 862static inline int serial_paranoia_check(struct cyclades_port *info,
863 char *name, const char *routine)
1da177e4
LT		 864{
865#ifdef SERIAL_PARANOIA_CHECK
02f1175c 866 if (!info) {
096dcfce
JS		 867 printk("cyc Warning: null cyclades_port for (%s) in %s\n",
868 name, routine);
02f1175c
JS		 869 return 1;
870 }
871
872 if ((long)info < (long)(&cy_port[0]) ||
873 (long)(&cy_port[NR_PORTS]) < (long)info) {
096dcfce
JS		 874 printk("cyc Warning: cyclades_port out of range for (%s) in "
875 "%s\n", name, routine);
02f1175c
JS		 876 return 1;
877 }
878
879 if (info->magic != CYCLADES_MAGIC) {
096dcfce
JS		 880 printk("cyc Warning: bad magic number for serial struct (%s) "
881 "in %s\n", name, routine);
02f1175c
JS		 882 return 1;
883 }
1da177e4 884#endif
02f1175c
JS		 885 return 0;
886} /* serial_paranoia_check */
1da177e4
LT		 887
888/*
889 * This routine is used by the interrupt handler to schedule
890 * processing in the software interrupt portion of the driver
891 * (also known as the "bottom half"). This can be called any
892 * number of times for any channel without harm.
893 */
02f1175c 894static inline void cy_sched_event(struct cyclades_port *info, int event)
1da177e4 895{
02f1175c
JS		 896 info->event |= 1 << event; /* remember what kind of event and who */
897 schedule_work(&info->tqueue);
898} /* cy_sched_event */
1da177e4
LT		 899
900/*
901 * This routine is used to handle the "bottom half" processing for the
902 * serial driver, known also the "software interrupt" processing.
903 * This processing is done at the kernel interrupt level, after the
904 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
905 * is where time-consuming activities which can not be done in the
906 * interrupt driver proper are done; the interrupt driver schedules
907 * them using cy_sched_event(), and they get done here.
908 *
909 * This is done through one level of indirection--the task queue.
910 * When a hardware interrupt service routine wants service by the
911 * driver's bottom half, it enqueues the appropriate tq_struct (one
912 * per port) to the keventd work queue and sets a request flag
913 * that the work queue be processed.
914 *
915 * Although this may seem unwieldy, it gives the system a way to
916 * pass an argument (in this case the pointer to the cyclades_port
917 * structure) to the bottom half of the driver. Previous kernels
918 * had to poll every port to see if that port needed servicing.
919 */
920static void
c4028958 921do_softint(struct work_struct *work)
1da177e4 922{
c4028958
DH		 923 struct cyclades_port *info =
924 container_of(work, struct cyclades_port, tqueue);
02f1175c
JS		 925 struct tty_struct *tty;
926
927 tty = info->tty;
928 if (!tty)
929 return;
930
931 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
932 tty_hangup(info->tty);
933 wake_up_interruptible(&info->open_wait);
934 info->flags &= ~ASYNC_NORMAL_ACTIVE;
935 }
936 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
937 wake_up_interruptible(&info->open_wait);
1da177e4 938#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 939 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
940 if (cyz_rx_full_timer[info->line].function == NULL) {
941 cyz_rx_full_timer[info->line].expires = jiffies + 1;
942 cyz_rx_full_timer[info->line].function = cyz_rx_restart;
943 cyz_rx_full_timer[info->line].data =
944 (unsigned long)info;
945 add_timer(&cyz_rx_full_timer[info->line]);
946 }
1da177e4 947 }
1da177e4 948#endif
02f1175c
JS		 949 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
950 wake_up_interruptible(&info->delta_msr_wait);
951 tty_wakeup(tty);
1da177e4 952#ifdef Z_WAKE
02f1175c
JS		 953 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
954 wake_up_interruptible(&info->shutdown_wait);
1da177e4
LT		 955#endif
956} /* do_softint */
957
958
959/***********************************************************/
960/********* Start of block of Cyclom-Y specific code ********/
961
962/* This routine waits up to 1000 micro-seconds for the previous
963 command to the Cirrus chip to complete and then issues the
964 new command. An error is returned if the previous command
965 didn't finish within the time limit.
966
967 This function is only called from inside spinlock-protected code.
968 */
02f1175c 969static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
1da177e4 970{
02f1175c 971 volatile int i;
1da177e4 972
02f1175c
JS		 973 /* Check to see that the previous command has completed */
974 for (i = 0; i < 100; i++) {
db05c3b1 975 if (readb(base_addr + (CyCCR << index)) == 0) {
02f1175c
JS		 976 break;
977 }
978 udelay(10L);
1da177e4 979 }
02f1175c
JS		 980 /* if the CCR never cleared, the previous command
981 didn't finish within the "reasonable time" */
982 if (i == 100)
096dcfce 983 return -1;
1da177e4 984
02f1175c
JS		 985 /* Issue the new command */
986 cy_writeb(base_addr + (CyCCR << index), cmd);
1da177e4 987
096dcfce 988 return 0;
02f1175c 989} /* cyy_issue_cmd */
1da177e4
LT		 990
991#ifdef CONFIG_ISA
992/* ISA interrupt detection code */
02f1175c 993static unsigned detect_isa_irq(void __iomem * address)
1da177e4 994{
02f1175c
JS		 995 int irq;
996 unsigned long irqs, flags;
997 int save_xir, save_car;
998 int index = 0; /* IRQ probing is only for ISA */
999
1000 /* forget possible initially masked and pending IRQ */
1001 irq = probe_irq_off(probe_irq_on());
1002
1003 /* Clear interrupts on the board first */
1004 cy_writeb(address + (Cy_ClrIntr << index), 0);
1005 /* Cy_ClrIntr is 0x1800 */
1006
1007 irqs = probe_irq_on();
1008 /* Wait ... */
1009 udelay(5000L);
1010
1011 /* Enable the Tx interrupts on the CD1400 */
1012 local_irq_save(flags);
1013 cy_writeb(address + (CyCAR << index), 0);
1014 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
1015
1016 cy_writeb(address + (CyCAR << index), 0);
1017 cy_writeb(address + (CySRER << index),
db05c3b1 1018 readb(address + (CySRER << index)) | CyTxRdy);
02f1175c
JS		 1019 local_irq_restore(flags);
1020
1021 /* Wait ... */
1022 udelay(5000L);
1023
1024 /* Check which interrupt is in use */
1025 irq = probe_irq_off(irqs);
1026
1027 /* Clean up */
db05c3b1
JS		 1028 save_xir = (u_char) readb(address + (CyTIR << index));
1029 save_car = readb(address + (CyCAR << index));
02f1175c
JS		 1030 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1031 cy_writeb(address + (CySRER << index),
db05c3b1 1032 readb(address + (CySRER << index)) & ~CyTxRdy);
02f1175c
JS		 1033 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1034 cy_writeb(address + (CyCAR << index), (save_car));
1035 cy_writeb(address + (Cy_ClrIntr << index), 0);
1036 /* Cy_ClrIntr is 0x1800 */
1037
1038 return (irq > 0) ? irq : 0;
1da177e4 1039}
02f1175c 1040#endif /* CONFIG_ISA */
1da177e4 1041
e941027f 1042static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
02f1175c 1043 void __iomem * base_addr, int status, int index)
e941027f
JS		 1044{
1045 struct cyclades_port *info;
1046 struct tty_struct *tty;
1047 volatile int char_count;
1048 int i, j, len, mdm_change, mdm_status, outch;
1049 int save_xir, channel, save_car;
1050 char data;
1051
02f1175c 1052 if (status & CySRReceive) { /* reception interrupt */
e941027f 1053#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1054 printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
e941027f 1055#endif
02f1175c
JS		 1056 /* determine the channel & change to that context */
1057 spin_lock(&cinfo->card_lock);
db05c3b1 1058 save_xir = (u_char) readb(base_addr + (CyRIR << index));
02f1175c
JS		 1059 channel = (u_short) (save_xir & CyIRChannel);
1060 i = channel + chip * 4 + cinfo->first_line;
1061 info = &cy_port[i];
1062 info->last_active = jiffies;
db05c3b1 1063 save_car = readb(base_addr + (CyCAR << index));
02f1175c
JS		 1064 cy_writeb(base_addr + (CyCAR << index), save_xir);
1065
1066 /* if there is nowhere to put the data, discard it */
1067 if (info->tty == 0) {
db05c3b1 1068 j = (readb(base_addr + (CyRIVR << index)) &
02f1175c
JS		 1069 CyIVRMask);
1070 if (j == CyIVRRxEx) { /* exception */
db05c3b1 1071 data = readb(base_addr + (CyRDSR << index));
02f1175c 1072 } else { /* normal character reception */
db05c3b1 1073 char_count = readb(base_addr +
02f1175c
JS		 1074 (CyRDCR << index));
1075 while (char_count--) {
db05c3b1 1076 data = readb(base_addr +
02f1175c 1077 (CyRDSR << index));
e941027f 1078 }
e941027f 1079 }
02f1175c
JS		 1080 } else { /* there is an open port for this data */
1081 tty = info->tty;
db05c3b1 1082 j = (readb(base_addr + (CyRIVR << index)) &
02f1175c
JS		 1083 CyIVRMask);
1084 if (j == CyIVRRxEx) { /* exception */
db05c3b1 1085 data = readb(base_addr + (CyRDSR << index));
02f1175c
JS		 1086
1087 /* For statistics only */
1088 if (data & CyBREAK)
1089 info->icount.brk++;
1090 else if (data & CyFRAME)
1091 info->icount.frame++;
1092 else if (data & CyPARITY)
1093 info->icount.parity++;
1094 else if (data & CyOVERRUN)
1095 info->icount.overrun++;
1096
1097 if (data & info->ignore_status_mask) {
1098 info->icount.rx++;
1099 return;
1100 }
1101 if (tty_buffer_request_room(tty, 1)) {
1102 if (data & info->read_status_mask) {
1103 if (data & CyBREAK) {
1104 tty_insert_flip_char(
1105 tty,
db05c3b1 1106 readb(
02f1175c
JS		 1107 base_addr +
1108 (CyRDSR <<
1109 index)),
1110 TTY_BREAK);
1111 info->icount.rx++;
1112 if (info->flags &
1113 ASYNC_SAK) {
1114 do_SAK(tty);
1115 }
1116 } else if (data & CyFRAME) {
1117 tty_insert_flip_char(
1118 tty,
db05c3b1 1119 readb(
02f1175c
JS		 1120 base_addr +
1121 (CyRDSR <<
1122 index)),
1123 TTY_FRAME);
1124 info->icount.rx++;
1125 info->idle_stats.
1126 frame_errs++;
1127 } else if (data & CyPARITY) {
1128 /* Pieces of seven... */
1129 tty_insert_flip_char(
1130 tty,
db05c3b1 1131 readb(
02f1175c
JS		 1132 base_addr +
1133 (CyRDSR <<
1134 index)),
1135 TTY_PARITY);
1136 info->icount.rx++;
1137 info->idle_stats.
1138 parity_errs++;
1139 } else if (data & CyOVERRUN) {
1140 tty_insert_flip_char(
1141 tty, 0,
1142 TTY_OVERRUN);
1143 info->icount.rx++;
1144 /* If the flip buffer itself is
1145 overflowing, we still lose
1146 the next incoming character.
1147 */
1148 tty_insert_flip_char(
1149 tty,
db05c3b1 1150 readb(
02f1175c
JS		 1151 base_addr +
1152 (CyRDSR <<
1153 index)),
1154 TTY_FRAME);
1155 info->icount.rx++;
1156 info->idle_stats.
1157 overruns++;
1158 /* These two conditions may imply */
1159 /* a normal read should be done. */
1160 /* }else if(data & CyTIMEOUT){ */
1161 /* }else if(data & CySPECHAR){ */
1162 } else {
1163 tty_insert_flip_char(
1164 tty, 0,
1165 TTY_NORMAL);
1166 info->icount.rx++;
1167 }
1168 } else {
1169 tty_insert_flip_char(tty, 0,
1170 TTY_NORMAL);
1171 info->icount.rx++;
1172 }
1173 } else {
1174 /* there was a software buffer
1175 overrun and nothing could be
1176 done about it!!! */
1177 info->icount.buf_overrun++;
1178 info->idle_stats.overruns++;
1179 }
1180 } else { /* normal character reception */
1181 /* load # chars available from the chip */
db05c3b1 1182 char_count = readb(base_addr +
02f1175c 1183 (CyRDCR << index));
e941027f
JS		 1184
1185#ifdef CY_ENABLE_MONITORING
02f1175c
JS		 1186 ++info->mon.int_count;
1187 info->mon.char_count += char_count;
1188 if (char_count > info->mon.char_max)
1189 info->mon.char_max = char_count;
1190 info->mon.char_last = char_count;
e941027f 1191#endif
02f1175c
JS		 1192 len = tty_buffer_request_room(tty, char_count);
1193 while (len--) {
db05c3b1 1194 data = readb(base_addr +
02f1175c
JS		 1195 (CyRDSR << index));
1196 tty_insert_flip_char(tty, data,
1197 TTY_NORMAL);
1198 info->idle_stats.recv_bytes++;
1199 info->icount.rx++;
e941027f 1200#ifdef CY_16Y_HACK
02f1175c 1201 udelay(10L);
e941027f 1202#endif
02f1175c
JS		 1203 }
1204 info->idle_stats.recv_idle = jiffies;
1205 }
1206 tty_schedule_flip(tty);
e941027f 1207 }
02f1175c
JS		 1208 /* end of service */
1209 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1210 cy_writeb(base_addr + (CyCAR << index), (save_car));
1211 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1212 }
1213
02f1175c
JS		 1214 if (status & CySRTransmit) { /* transmission interrupt */
1215 /* Since we only get here when the transmit buffer
1216 is empty, we know we can always stuff a dozen
1217 characters. */
e941027f 1218#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1219 printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
e941027f
JS		 1220#endif
1221
02f1175c
JS		 1222 /* determine the channel & change to that context */
1223 spin_lock(&cinfo->card_lock);
db05c3b1 1224 save_xir = (u_char) readb(base_addr + (CyTIR << index));
02f1175c
JS		 1225 channel = (u_short) (save_xir & CyIRChannel);
1226 i = channel + chip * 4 + cinfo->first_line;
db05c3b1 1227 save_car = readb(base_addr + (CyCAR << index));
02f1175c
JS		 1228 cy_writeb(base_addr + (CyCAR << index), save_xir);
1229
1230 /* validate the port# (as configured and open) */
1231 if ((i < 0) || (NR_PORTS <= i)) {
1232 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1233 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1234 ~CyTxRdy);
1235 goto txend;
e941027f 1236 }
02f1175c
JS		 1237 info = &cy_port[i];
1238 info->last_active = jiffies;
1239 if (info->tty == 0) {
1240 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1241 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1242 ~CyTxRdy);
1243 goto txdone;
e941027f 1244 }
02f1175c
JS		 1245
1246 /* load the on-chip space for outbound data */
1247 char_count = info->xmit_fifo_size;
1248
1249 if (info->x_char) { /* send special char */
1250 outch = info->x_char;
1251 cy_writeb(base_addr + (CyTDR << index), outch);
1252 char_count--;
1253 info->icount.tx++;
1254 info->x_char = 0;
e941027f 1255 }
02f1175c
JS		 1256
1257 if (info->breakon || info->breakoff) {
1258 if (info->breakon) {
1259 cy_writeb(base_addr + (CyTDR << index), 0);
1260 cy_writeb(base_addr + (CyTDR << index), 0x81);
1261 info->breakon = 0;
1262 char_count -= 2;
1263 }
1264 if (info->breakoff) {
1265 cy_writeb(base_addr + (CyTDR << index), 0);
1266 cy_writeb(base_addr + (CyTDR << index), 0x83);
1267 info->breakoff = 0;
1268 char_count -= 2;
1269 }
e941027f 1270 }
02f1175c
JS		 1271
1272 while (char_count-- > 0) {
1273 if (!info->xmit_cnt) {
db05c3b1 1274 if (readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1275 CyTxMpty) {
1276 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1277 readb(base_addr +
02f1175c
JS		 1278 (CySRER << index)) &
1279 ~CyTxMpty);
1280 } else {
1281 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1282 (readb(base_addr +
02f1175c
JS		 1283 (CySRER << index)) &
1284 ~CyTxRdy) | CyTxMpty);
1285 }
1286 goto txdone;
1287 }
1288 if (info->xmit_buf == 0) {
1289 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1290 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1291 ~CyTxRdy);
1292 goto txdone;
1293 }
1294 if (info->tty->stopped || info->tty->hw_stopped) {
1295 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1296 readb(base_addr + (CySRER << index)) &
02f1175c
JS		 1297 ~CyTxRdy);
1298 goto txdone;
1299 }
1300 /* Because the Embedded Transmit Commands have
1301 been enabled, we must check to see if the
1302 escape character, NULL, is being sent. If it
1303 is, we must ensure that there is room for it
1304 to be doubled in the output stream. Therefore
1305 we no longer advance the pointer when the
1306 character is fetched, but rather wait until
1307 after the check for a NULL output character.
1308 This is necessary because there may not be
1309 room for the two chars needed to send a NULL.)
1310 */
1311 outch = info->xmit_buf[info->xmit_tail];
1312 if (outch) {
1313 info->xmit_cnt--;
1314 info->xmit_tail = (info->xmit_tail + 1) &
1315 (SERIAL_XMIT_SIZE - 1);
1316 cy_writeb(base_addr + (CyTDR << index), outch);
1317 info->icount.tx++;
1318 } else {
1319 if (char_count > 1) {
1320 info->xmit_cnt--;
1321 info->xmit_tail = (info->xmit_tail + 1)&
1322 (SERIAL_XMIT_SIZE - 1);
1323 cy_writeb(base_addr + (CyTDR << index),
1324 outch);
1325 cy_writeb(base_addr + (CyTDR << index),
1326 0);
1327 info->icount.tx++;
1328 char_count--;
1329 } else {
1330 }
1331 }
e941027f 1332 }
e941027f
JS		 1333
1334txdone:
02f1175c
JS		 1335 if (info->xmit_cnt < WAKEUP_CHARS) {
1336 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1337 }
e941027f 1338txend:
02f1175c
JS		 1339 /* end of service */
1340 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1341 cy_writeb(base_addr + (CyCAR << index), (save_car));
1342 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1343 }
1344
02f1175c 1345 if (status & CySRModem) { /* modem interrupt */
e941027f 1346
02f1175c
JS		 1347 /* determine the channel & change to that context */
1348 spin_lock(&cinfo->card_lock);
db05c3b1 1349 save_xir = (u_char) readb(base_addr + (CyMIR << index));
02f1175c
JS		 1350 channel = (u_short) (save_xir & CyIRChannel);
1351 info = &cy_port[channel + chip * 4 + cinfo->first_line];
1352 info->last_active = jiffies;
db05c3b1 1353 save_car = readb(base_addr + (CyCAR << index));
02f1175c
JS		 1354 cy_writeb(base_addr + (CyCAR << index), save_xir);
1355
db05c3b1
JS		 1356 mdm_change = readb(base_addr + (CyMISR << index));
1357 mdm_status = readb(base_addr + (CyMSVR1 << index));
02f1175c
JS		 1358
1359 if (info->tty == 0) { /* no place for data, ignore it */
1360 ;
1361 } else {
1362 if (mdm_change & CyANY_DELTA) {
1363 /* For statistics only */
1364 if (mdm_change & CyDCD)
1365 info->icount.dcd++;
1366 if (mdm_change & CyCTS)
1367 info->icount.cts++;
1368 if (mdm_change & CyDSR)
1369 info->icount.dsr++;
1370 if (mdm_change & CyRI)
1371 info->icount.rng++;
1372
1373 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
e941027f 1374 }
02f1175c
JS		 1375
1376 if ((mdm_change & CyDCD) &&
1377 (info->flags & ASYNC_CHECK_CD)) {
1378 if (mdm_status & CyDCD) {
1379 cy_sched_event(info,
1380 Cy_EVENT_OPEN_WAKEUP);
1381 } else {
1382 cy_sched_event(info, Cy_EVENT_HANGUP);
1383 }
1384 }
1385 if ((mdm_change & CyCTS) &&
1386 (info->flags & ASYNC_CTS_FLOW)) {
1387 if (info->tty->hw_stopped) {
1388 if (mdm_status & CyCTS) {
1389 /* cy_start isn't used
1390 because... !!! */
1391 info->tty->hw_stopped = 0;
1392 cy_writeb(base_addr +
1393 (CySRER << index),
db05c3b1 1394 readb(base_addr +
02f1175c
JS		 1395 (CySRER <<
1396 index))|
1397 CyTxRdy);
1398 cy_sched_event(info,
1399 Cy_EVENT_WRITE_WAKEUP);
1400 }
1401 } else {
1402 if (!(mdm_status & CyCTS)) {
1403 /* cy_stop isn't used
1404 because ... !!! */
1405 info->tty->hw_stopped = 1;
1406 cy_writeb(base_addr +
1407 (CySRER << index),
db05c3b1 1408 readb(base_addr +
02f1175c
JS		 1409 (CySRER <<
1410 index)) &
1411 ~CyTxRdy);
1412 }
1413 }
1414 }
1415 if (mdm_change & CyDSR) {
1416 }
1417 if (mdm_change & CyRI) {
e941027f 1418 }
e941027f 1419 }
02f1175c
JS		 1420 /* end of service */
1421 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1422 cy_writeb(base_addr + (CyCAR << index), save_car);
1423 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1424 }
1425}
1426
1da177e4
LT		 1427/* The real interrupt service routine is called
1428 whenever the card wants its hand held--chars
1429 received, out buffer empty, modem change, etc.
1430 */
02f1175c 1431static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1da177e4 1432{
02f1175c
JS		 1433 int status;
1434 struct cyclades_card *cinfo;
1435 void __iomem *base_addr, *card_base_addr;
1436 int chip;
1437 int index;
1438 int too_many;
1439 int had_work;
1440
1441 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1da177e4 1442#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1443 printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
1da177e4 1444#endif
02f1175c
JS		 1445 return IRQ_NONE; /* spurious interrupt */
1446 }
1447
1448 card_base_addr = cinfo->base_addr;
1449 index = cinfo->bus_index;
1450
1451 /* This loop checks all chips in the card. Make a note whenever
1452 _any_ chip had some work to do, as this is considered an
1453 indication that there will be more to do. Only when no chip
1454 has any work does this outermost loop exit.
1455 */
1456 do {
1457 had_work = 0;
1458 for (chip = 0; chip < cinfo->num_chips; chip++) {
1459 base_addr = cinfo->base_addr +
1460 (cy_chip_offset[chip] << index);
1461 too_many = 0;
db05c3b1 1462 while ((status = readb(base_addr +
02f1175c
JS		 1463 (CySVRR << index))) != 0x00) {
1464 had_work++;
1465 /* The purpose of the following test is to ensure that
1466 no chip can monopolize the driver. This forces the
1467 chips to be checked in a round-robin fashion (after
1468 draining each of a bunch (1000) of characters).
1469 */
1470 if (1000 < too_many++) {
1471 break;
1472 }
1473 cyy_intr_chip(cinfo, chip, base_addr, status,
1474 index);
1475 }
1476 }
1477 } while (had_work);
1478
1479 /* clear interrupts */
1480 spin_lock(&cinfo->card_lock);
1481 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1482 /* Cy_ClrIntr is 0x1800 */
1483 spin_unlock(&cinfo->card_lock);
1484 return IRQ_HANDLED;
1485} /* cyy_interrupt */
1da177e4
LT		 1486
1487/***********************************************************/
1488/********* End of block of Cyclom-Y specific code **********/
1489/******** Start of block of Cyclades-Z specific code *********/
1490/***********************************************************/
1491
1492static int
02f1175c 1493cyz_fetch_msg(struct cyclades_card *cinfo,
1a86b5e3 1494 __u32 * channel, __u8 * cmd, __u32 * param)
1da177e4 1495{
02f1175c
JS		 1496 struct FIRM_ID __iomem *firm_id;
1497 struct ZFW_CTRL __iomem *zfw_ctrl;
1498 struct BOARD_CTRL __iomem *board_ctrl;
1499 unsigned long loc_doorbell;
1500
1501 firm_id = cinfo->base_addr + ID_ADDRESS;
1502 if (!ISZLOADED(*cinfo)) {
096dcfce 1503 return -1;
02f1175c 1504 }
db05c3b1 1505 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 1506 board_ctrl = &zfw_ctrl->board_ctrl;
1507
db05c3b1 1508 loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
02f1175c
JS		 1509 (cinfo->ctl_addr))->loc_doorbell);
1510 if (loc_doorbell) {
1511 *cmd = (char)(0xff & loc_doorbell);
db05c3b1
JS		 1512 *channel = readl(&board_ctrl->fwcmd_channel);
1513 *param = (__u32) readl(&board_ctrl->fwcmd_param);
02f1175c
JS		 1514 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1515 loc_doorbell, 0xffffffff);
1516 return 1;
1517 }
1518 return 0;
1519} /* cyz_fetch_msg */
1da177e4
LT		 1520
1521static int
02f1175c 1522cyz_issue_cmd(struct cyclades_card *cinfo,
1a86b5e3 1523 __u32 channel, __u8 cmd, __u32 param)
1da177e4 1524{
02f1175c
JS		 1525 struct FIRM_ID __iomem *firm_id;
1526 struct ZFW_CTRL __iomem *zfw_ctrl;
1527 struct BOARD_CTRL __iomem *board_ctrl;
1a86b5e3 1528 __u32 __iomem *pci_doorbell;
02f1175c
JS		 1529 int index;
1530
1531 firm_id = cinfo->base_addr + ID_ADDRESS;
1532 if (!ISZLOADED(*cinfo)) {
096dcfce 1533 return -1;
02f1175c 1534 }
db05c3b1 1535 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 1536 board_ctrl = &zfw_ctrl->board_ctrl;
1537
1538 index = 0;
1539 pci_doorbell =
1540 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
db05c3b1 1541 while ((readl(pci_doorbell) & 0xff) != 0) {
02f1175c 1542 if (index++ == 1000) {
db05c3b1 1543 return (int)(readl(pci_doorbell) & 0xff);
02f1175c
JS		 1544 }
1545 udelay(50L);
1546 }
1547 cy_writel(&board_ctrl->hcmd_channel, channel);
1548 cy_writel(&board_ctrl->hcmd_param, param);
1549 cy_writel(pci_doorbell, (long)cmd);
1550
096dcfce 1551 return 0;
02f1175c 1552} /* cyz_issue_cmd */
1da177e4
LT		 1553
1554static void
1555cyz_handle_rx(struct cyclades_port *info,
02f1175c
JS		 1556 volatile struct CH_CTRL __iomem * ch_ctrl,
1557 volatile struct BUF_CTRL __iomem * buf_ctrl)
1da177e4 1558{
02f1175c
JS		 1559 struct cyclades_card *cinfo = &cy_card[info->card];
1560 struct tty_struct *tty = info->tty;
1561 volatile int char_count;
1562 int len;
1da177e4 1563#ifdef BLOCKMOVE
02f1175c 1564 int small_count;
1da177e4 1565#else
02f1175c 1566 char data;
1da177e4 1567#endif
1a86b5e3 1568 volatile __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1da177e4 1569
db05c3b1
JS		 1570 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1571 rx_put = readl(&buf_ctrl->rx_put);
1572 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1573 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
02f1175c
JS		 1574 if (rx_put >= rx_get)
1575 char_count = rx_put - rx_get;
1576 else
1577 char_count = rx_put - rx_get + rx_bufsize;
1da177e4 1578
02f1175c
JS		 1579 if (char_count) {
1580 info->last_active = jiffies;
1581 info->jiffies[1] = jiffies;
1da177e4
LT		 1582
1583#ifdef CY_ENABLE_MONITORING
02f1175c
JS		 1584 info->mon.int_count++;
1585 info->mon.char_count += char_count;
1586 if (char_count > info->mon.char_max)
1587 info->mon.char_max = char_count;
1588 info->mon.char_last = char_count;
1da177e4 1589#endif
02f1175c
JS		 1590 if (tty == 0) {
1591 /* flush received characters */
1592 new_rx_get = (new_rx_get + char_count) &
1593 (rx_bufsize - 1);
1594 info->rflush_count++;
1595 } else {
1da177e4 1596#ifdef BLOCKMOVE
02f1175c
JS		 1597 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1598 for performance, but because of buffer boundaries, there
1599 may be several steps to the operation */
1600 while (0 < (small_count = min_t(unsigned int,
1601 rx_bufsize - new_rx_get,
1602 min_t(unsigned int, TTY_FLIPBUF_SIZE -
1603 tty->flip.count, char_count)))){
1604 memcpy_fromio(tty->flip.char_buf_ptr,
1605 (char *)(cinfo->base_addr + rx_bufaddr +
1606 new_rx_get),
1607 small_count);
1608
1609 tty->flip.char_buf_ptr += small_count;
1610 memset(tty->flip.flag_buf_ptr, TTY_NORMAL,
1611 small_count);
1612 tty->flip.flag_buf_ptr += small_count;
1613 new_rx_get = (new_rx_get + small_count) &
1614 (rx_bufsize - 1);
1615 char_count -= small_count;
1616 info->icount.rx += small_count;
1617 info->idle_stats.recv_bytes += small_count;
1618 tty->flip.count += small_count;
1619 }
1da177e4 1620#else
02f1175c
JS		 1621 len = tty_buffer_request_room(tty, char_count);
1622 while (len--) {
db05c3b1 1623 data = readb(cinfo->base_addr + rx_bufaddr +
02f1175c
JS		 1624 new_rx_get);
1625 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1626 tty_insert_flip_char(tty, data, TTY_NORMAL);
1627 info->idle_stats.recv_bytes++;
1628 info->icount.rx++;
1629 }
1da177e4
LT		 1630#endif
1631#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1632 /* Recalculate the number of chars in the RX buffer and issue
1633 a cmd in case it's higher than the RX high water mark */
db05c3b1 1634 rx_put = readl(&buf_ctrl->rx_put);
02f1175c
JS		 1635 if (rx_put >= rx_get)
1636 char_count = rx_put - rx_get;
1637 else
1638 char_count = rx_put - rx_get + rx_bufsize;
db05c3b1 1639 if (char_count >= (int)readl(&buf_ctrl->rx_threshold)) {
02f1175c
JS		 1640 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1641 }
1da177e4 1642#endif
02f1175c
JS		 1643 info->idle_stats.recv_idle = jiffies;
1644 tty_schedule_flip(tty);
1645 }
1646 /* Update rx_get */
1647 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1da177e4 1648 }
1da177e4
LT		 1649}
1650
1651static void
1652cyz_handle_tx(struct cyclades_port *info,
02f1175c
JS		 1653 volatile struct CH_CTRL __iomem * ch_ctrl,
1654 volatile struct BUF_CTRL __iomem * buf_ctrl)
1da177e4 1655{
02f1175c
JS		 1656 struct cyclades_card *cinfo = &cy_card[info->card];
1657 struct tty_struct *tty = info->tty;
1658 char data;
1659 volatile int char_count;
1da177e4 1660#ifdef BLOCKMOVE
02f1175c 1661 int small_count;
1da177e4 1662#endif
1a86b5e3 1663 volatile __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1da177e4 1664
02f1175c
JS		 1665 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1666 return;
1da177e4 1667
db05c3b1
JS		 1668 tx_get = readl(&buf_ctrl->tx_get);
1669 tx_put = readl(&buf_ctrl->tx_put);
1670 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1671 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
02f1175c
JS		 1672 if (tx_put >= tx_get)
1673 char_count = tx_get - tx_put - 1 + tx_bufsize;
1674 else
1675 char_count = tx_get - tx_put - 1;
1da177e4 1676
02f1175c 1677 if (char_count) {
1da177e4 1678
02f1175c
JS		 1679 if (tty == 0) {
1680 goto ztxdone;
1681 }
1da177e4 1682
02f1175c
JS		 1683 if (info->x_char) { /* send special char */
1684 data = info->x_char;
1da177e4 1685
02f1175c
JS		 1686 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1687 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1688 info->x_char = 0;
1689 char_count--;
1690 info->icount.tx++;
1691 info->last_active = jiffies;
1692 info->jiffies[2] = jiffies;
1693 }
1da177e4 1694#ifdef BLOCKMOVE
02f1175c
JS		 1695 while (0 < (small_count = min_t(unsigned int,
1696 tx_bufsize - tx_put, min_t(unsigned int,
1697 (SERIAL_XMIT_SIZE - info->xmit_tail),
1698 min_t(unsigned int, info->xmit_cnt,
1699 char_count))))) {
1700
1701 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1702 tx_put),
1703 &info->xmit_buf[info->xmit_tail],
1704 small_count);
1705
1706 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1707 char_count -= small_count;
1708 info->icount.tx += small_count;
1709 info->xmit_cnt -= small_count;
1710 info->xmit_tail = (info->xmit_tail + small_count) &
1711 (SERIAL_XMIT_SIZE - 1);
1712 info->last_active = jiffies;
1713 info->jiffies[2] = jiffies;
1714 }
1da177e4 1715#else
02f1175c
JS		 1716 while (info->xmit_cnt && char_count) {
1717 data = info->xmit_buf[info->xmit_tail];
1718 info->xmit_cnt--;
1719 info->xmit_tail = (info->xmit_tail + 1) &
1720 (SERIAL_XMIT_SIZE - 1);
1721
1722 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1723 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1724 char_count--;
1725 info->icount.tx++;
1726 info->last_active = jiffies;
1727 info->jiffies[2] = jiffies;
1728 }
1da177e4 1729#endif
02f1175c
JS		 1730ztxdone:
1731 if (info->xmit_cnt < WAKEUP_CHARS) {
1732 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1733 }
1734 /* Update tx_put */
1735 cy_writel(&buf_ctrl->tx_put, tx_put);
1da177e4 1736 }
1da177e4
LT		 1737}
1738
02f1175c 1739static void cyz_handle_cmd(struct cyclades_card *cinfo)
1da177e4 1740{
02f1175c
JS		 1741 struct tty_struct *tty;
1742 struct cyclades_port *info;
1743 static volatile struct FIRM_ID __iomem *firm_id;
1744 static volatile struct ZFW_CTRL __iomem *zfw_ctrl;
1745 static volatile struct BOARD_CTRL __iomem *board_ctrl;
1746 static volatile struct CH_CTRL __iomem *ch_ctrl;
1747 static volatile struct BUF_CTRL __iomem *buf_ctrl;
1a86b5e3
KK		 1748 __u32 channel;
1749 __u8 cmd;
1750 __u32 param;
1751 __u32 hw_ver, fw_ver;
02f1175c
JS		 1752 int special_count;
1753 int delta_count;
1754
1755 firm_id = cinfo->base_addr + ID_ADDRESS;
db05c3b1 1756 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 1757 board_ctrl = &zfw_ctrl->board_ctrl;
db05c3b1
JS		 1758 fw_ver = readl(&board_ctrl->fw_version);
1759 hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
02f1175c
JS		 1760 mail_box_0);
1761
1762 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1763 special_count = 0;
1764 delta_count = 0;
1765 info = &cy_port[channel + cinfo->first_line];
1766 if ((tty = info->tty) == 0) {
1767 continue;
1da177e4 1768 }
02f1175c
JS		 1769 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1770 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1771
1772 switch (cmd) {
1773 case C_CM_PR_ERROR:
1774 tty_insert_flip_char(tty, 0, TTY_PARITY);
1775 info->icount.rx++;
1776 special_count++;
1777 break;
1778 case C_CM_FR_ERROR:
1779 tty_insert_flip_char(tty, 0, TTY_FRAME);
1780 info->icount.rx++;
1781 special_count++;
1782 break;
1783 case C_CM_RXBRK:
1784 tty_insert_flip_char(tty, 0, TTY_BREAK);
1785 info->icount.rx++;
1786 special_count++;
1787 break;
1788 case C_CM_MDCD:
1789 info->icount.dcd++;
1790 delta_count++;
1791 if (info->flags & ASYNC_CHECK_CD) {
1792 if ((fw_ver > 241 ? ((u_long) param) :
db05c3b1 1793 readl(&ch_ctrl->rs_status)) &
02f1175c
JS		 1794 C_RS_DCD) {
1795 cy_sched_event(info,
1796 Cy_EVENT_OPEN_WAKEUP);
1797 } else {
1798 cy_sched_event(info, Cy_EVENT_HANGUP);
1799 }
1800 }
1801 break;
1802 case C_CM_MCTS:
1803 info->icount.cts++;
1804 delta_count++;
1805 break;
1806 case C_CM_MRI:
1807 info->icount.rng++;
1808 delta_count++;
1809 break;
1810 case C_CM_MDSR:
1811 info->icount.dsr++;
1812 delta_count++;
1813 break;
1da177e4 1814#ifdef Z_WAKE
02f1175c
JS		 1815 case C_CM_IOCTLW:
1816 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1817 break;
1da177e4
LT		 1818#endif
1819#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1820 case C_CM_RXHIWM:
1821 case C_CM_RXNNDT:
1822 case C_CM_INTBACK2:
1823 /* Reception Interrupt */
1da177e4 1824#ifdef CY_DEBUG_INTERRUPTS
02f1175c
JS		 1825 printk("cyz_interrupt: rcvd intr, card %d, "
1826 "port %ld\n\r", info->card, channel);
1da177e4 1827#endif
02f1175c
JS		 1828 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1829 break;
1830 case C_CM_TXBEMPTY:
1831 case C_CM_TXLOWWM:
1832 case C_CM_INTBACK:
1833 /* Transmission Interrupt */
1da177e4 1834#ifdef CY_DEBUG_INTERRUPTS
02f1175c
JS		 1835 printk("cyz_interrupt: xmit intr, card %d, "
1836 "port %ld\n\r", info->card, channel);
1da177e4 1837#endif
02f1175c
JS		 1838 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1839 break;
1840#endif /* CONFIG_CYZ_INTR */
1841 case C_CM_FATAL:
1842 /* should do something with this !!! */
1843 break;
1844 default:
1845 break;
1846 }
1847 if (delta_count)
1848 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1849 if (special_count)
1850 tty_schedule_flip(tty);
1da177e4 1851 }
1da177e4
LT		 1852}
1853
1854#ifdef CONFIG_CYZ_INTR
02f1175c 1855static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1da177e4 1856{
02f1175c 1857 struct cyclades_card *cinfo;
1da177e4 1858
02f1175c 1859 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1da177e4 1860#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1861 printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
1da177e4 1862#endif
02f1175c
JS		 1863 return IRQ_NONE; /* spurious interrupt */
1864 }
1da177e4 1865
02f1175c 1866 if (!ISZLOADED(*cinfo)) {
1da177e4 1867#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1868 printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq);
1da177e4 1869#endif
02f1175c
JS		 1870 return IRQ_NONE;
1871 }
1da177e4 1872
02f1175c
JS		 1873 /* Handle the interrupts */
1874 cyz_handle_cmd(cinfo);
1da177e4 1875
02f1175c
JS		 1876 return IRQ_HANDLED;
1877} /* cyz_interrupt */
1da177e4 1878
02f1175c 1879static void cyz_rx_restart(unsigned long arg)
1da177e4 1880{
02f1175c
JS		 1881 struct cyclades_port *info = (struct cyclades_port *)arg;
1882 int retval;
1883 int card = info->card;
1a86b5e3 1884 __u32 channel = (info->line) - (cy_card[card].first_line);
02f1175c
JS		 1885 unsigned long flags;
1886
1887 CY_LOCK(info, flags);
1888 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
1889 if (retval != 0) {
1890 printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1891 info->line, retval);
1892 }
1893 cyz_rx_full_timer[info->line].function = NULL;
1894 CY_UNLOCK(info, flags);
1da177e4
LT		 1895}
1896
02f1175c 1897#else /* CONFIG_CYZ_INTR */
1da177e4 1898
02f1175c 1899static void cyz_poll(unsigned long arg)
1da177e4 1900{
02f1175c
JS		 1901 struct cyclades_card *cinfo;
1902 struct cyclades_port *info;
1903 struct tty_struct *tty;
1904 static volatile struct FIRM_ID *firm_id;
1905 static volatile struct ZFW_CTRL *zfw_ctrl;
1906 static volatile struct BOARD_CTRL *board_ctrl;
1907 static volatile struct CH_CTRL *ch_ctrl;
1908 static volatile struct BUF_CTRL *buf_ctrl;
1909 int card, port;
1da177e4 1910
02f1175c
JS		 1911 cyz_timerlist.expires = jiffies + (HZ);
1912 for (card = 0; card < NR_CARDS; card++) {
1913 cinfo = &cy_card[card];
1914
1915 if (!IS_CYC_Z(*cinfo))
1916 continue;
1917 if (!ISZLOADED(*cinfo))
1918 continue;
1919
1920 firm_id = cinfo->base_addr + ID_ADDRESS;
1921 zfw_ctrl = cinfo->base_addr +
db05c3b1 1922 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 1923 board_ctrl = &(zfw_ctrl->board_ctrl);
1da177e4
LT		 1924
1925 /* Skip first polling cycle to avoid racing conditions with the FW */
02f1175c 1926 if (!cinfo->intr_enabled) {
db05c3b1 1927 cinfo->nports = (int)readl(&board_ctrl->n_channel);
02f1175c
JS		 1928 cinfo->intr_enabled = 1;
1929 continue;
1930 }
1da177e4 1931
02f1175c 1932 cyz_handle_cmd(cinfo);
1da177e4 1933
02f1175c
JS		 1934 for (port = 0; port < cinfo->nports; port++) {
1935 info = &cy_port[port + cinfo->first_line];
1936 tty = info->tty;
1937 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1938 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1da177e4 1939
02f1175c
JS		 1940 if (!info->throttle)
1941 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1942 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1943 }
1944 /* poll every 'cyz_polling_cycle' period */
1945 cyz_timerlist.expires = jiffies + cyz_polling_cycle;
1da177e4 1946 }
02f1175c 1947 add_timer(&cyz_timerlist);
02f1175c 1948} /* cyz_poll */
1da177e4 1949
02f1175c 1950#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 1951
1952/********** End of block of Cyclades-Z specific code *********/
1953/***********************************************************/
1954
1da177e4
LT		 1955/* This is called whenever a port becomes active;
1956 interrupts are enabled and DTR & RTS are turned on.
1957 */
02f1175c 1958static int startup(struct cyclades_port *info)
1da177e4 1959{
02f1175c
JS		 1960 unsigned long flags;
1961 int retval = 0;
1962 void __iomem *base_addr;
1963 int card, chip, channel, index;
1964 unsigned long page;
1da177e4 1965
02f1175c
JS		 1966 card = info->card;
1967 channel = (info->line) - (cy_card[card].first_line);
1da177e4 1968
02f1175c
JS		 1969 page = get_zeroed_page(GFP_KERNEL);
1970 if (!page)
1971 return -ENOMEM;
1da177e4 1972
02f1175c 1973 CY_LOCK(info, flags);
1da177e4 1974
02f1175c
JS		 1975 if (info->flags & ASYNC_INITIALIZED) {
1976 free_page(page);
1977 goto errout;
1978 }
1da177e4 1979
02f1175c
JS		 1980 if (!info->type) {
1981 if (info->tty) {
1982 set_bit(TTY_IO_ERROR, &info->tty->flags);
1983 }
1984 free_page(page);
1985 goto errout;
1986 }
1da177e4 1987
02f1175c
JS		 1988 if (info->xmit_buf)
1989 free_page(page);
1990 else
1991 info->xmit_buf = (unsigned char *)page;
1da177e4 1992
02f1175c 1993 CY_UNLOCK(info, flags);
1da177e4 1994
02f1175c 1995 set_line_char(info);
1da177e4 1996
02f1175c
JS		 1997 if (!IS_CYC_Z(cy_card[card])) {
1998 chip = channel >> 2;
1999 channel &= 0x03;
2000 index = cy_card[card].bus_index;
2001 base_addr = cy_card[card].base_addr +
2002 (cy_chip_offset[chip] << index);
1da177e4
LT		 2003
2004#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2005 printk("cyc startup card %d, chip %d, channel %d, "
2006 "base_addr %lx\n",
2007 card, chip, channel, (long)base_addr);
2008 /**/
1da177e4 2009#endif
02f1175c 2010 CY_LOCK(info, flags);
1da177e4 2011
02f1175c 2012 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1da177e4 2013
02f1175c
JS		 2014 cy_writeb(base_addr + (CyRTPR << index),
2015 (info->default_timeout ? info->default_timeout : 0x02));
2016 /* 10ms rx timeout */
1da177e4 2017
02f1175c
JS		 2018 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
2019 index);
1da177e4 2020
02f1175c
JS		 2021 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2022 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
2023 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1da177e4
LT		 2024
2025#ifdef CY_DEBUG_DTR
02f1175c
JS		 2026 printk("cyc:startup raising DTR\n");
2027 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 2028 readb(base_addr + (CyMSVR1 << index)),
2029 readb(base_addr + (CyMSVR2 << index)));
1da177e4
LT		 2030#endif
2031
02f1175c 2032 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2033 readb(base_addr + (CySRER << index)) | CyRxData);
02f1175c 2034 info->flags |= ASYNC_INITIALIZED;
1da177e4 2035
02f1175c
JS		 2036 if (info->tty) {
2037 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2038 }
2039 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2040 info->breakon = info->breakoff = 0;
2041 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2042 info->idle_stats.in_use =
2043 info->idle_stats.recv_idle =
2044 info->idle_stats.xmit_idle = jiffies;
1da177e4 2045
02f1175c 2046 CY_UNLOCK(info, flags);
1da177e4 2047
02f1175c
JS		 2048 } else {
2049 struct FIRM_ID __iomem *firm_id;
2050 struct ZFW_CTRL __iomem *zfw_ctrl;
2051 struct BOARD_CTRL __iomem *board_ctrl;
2052 struct CH_CTRL __iomem *ch_ctrl;
2053 int retval;
1da177e4 2054
02f1175c 2055 base_addr = cy_card[card].base_addr;
1da177e4 2056
02f1175c
JS		 2057 firm_id = base_addr + ID_ADDRESS;
2058 if (!ISZLOADED(cy_card[card])) {
2059 return -ENODEV;
2060 }
1da177e4 2061
02f1175c 2062 zfw_ctrl = cy_card[card].base_addr +
db05c3b1 2063 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2064 board_ctrl = &zfw_ctrl->board_ctrl;
2065 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4
LT		 2066
2067#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2068 printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
2069 card, channel, (long)base_addr);
2070 /**/
1da177e4 2071#endif
02f1175c 2072 CY_LOCK(info, flags);
1da177e4 2073
02f1175c 2074 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1da177e4
LT		 2075#ifdef Z_WAKE
2076#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 2077 cy_writel(&ch_ctrl[channel].intr_enable,
2078 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2079 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1da177e4 2080#else
02f1175c
JS		 2081 cy_writel(&ch_ctrl[channel].intr_enable,
2082 C_IN_IOCTLW | C_IN_MDCD);
2083#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 2084#else
2085#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 2086 cy_writel(&ch_ctrl[channel].intr_enable,
2087 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2088 C_IN_RXNNDT | C_IN_MDCD);
1da177e4 2089#else
02f1175c
JS		 2090 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2091#endif /* CONFIG_CYZ_INTR */
2092#endif /* Z_WAKE */
2093
2094 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
2095 if (retval != 0) {
2096 printk("cyc:startup(1) retval on ttyC%d was %x\n",
2097 info->line, retval);
2098 }
1da177e4 2099
02f1175c
JS		 2100 /* Flush RX buffers before raising DTR and RTS */
2101 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX,
2102 0L);
2103 if (retval != 0) {
2104 printk("cyc:startup(2) retval on ttyC%d was %x\n",
2105 info->line, retval);
2106 }
1da177e4 2107
02f1175c
JS		 2108 /* set timeout !!! */
2109 /* set RTS and DTR !!! */
2110 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1 2111 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
02f1175c
JS		 2112 C_RS_DTR);
2113 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2114 C_CM_IOCTLM, 0L);
2115 if (retval != 0) {
2116 printk("cyc:startup(3) retval on ttyC%d was %x\n",
2117 info->line, retval);
2118 }
1da177e4 2119#ifdef CY_DEBUG_DTR
02f1175c 2120 printk("cyc:startup raising Z DTR\n");
1da177e4
LT		 2121#endif
2122
02f1175c
JS		 2123 /* enable send, recv, modem !!! */
2124
2125 info->flags |= ASYNC_INITIALIZED;
2126 if (info->tty) {
2127 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2128 }
2129 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2130 info->breakon = info->breakoff = 0;
2131 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2132 info->idle_stats.in_use =
2133 info->idle_stats.recv_idle =
2134 info->idle_stats.xmit_idle = jiffies;
1da177e4 2135
02f1175c 2136 CY_UNLOCK(info, flags);
1da177e4 2137 }
1da177e4
LT		 2138
2139#ifdef CY_DEBUG_OPEN
2140 printk(" cyc startup done\n");
2141#endif
2142 return 0;
2143
2144errout:
2145 CY_UNLOCK(info, flags);
2146 return retval;
02f1175c 2147} /* startup */
1da177e4 2148
02f1175c 2149static void start_xmit(struct cyclades_port *info)
1da177e4 2150{
02f1175c
JS		 2151 unsigned long flags;
2152 void __iomem *base_addr;
2153 int card, chip, channel, index;
1da177e4 2154
02f1175c
JS		 2155 card = info->card;
2156 channel = (info->line) - (cy_card[card].first_line);
2157 if (!IS_CYC_Z(cy_card[card])) {
2158 chip = channel >> 2;
2159 channel &= 0x03;
2160 index = cy_card[card].bus_index;
2161 base_addr = cy_card[card].base_addr +
2162 (cy_chip_offset[chip] << index);
2163
2164 CY_LOCK(info, flags);
2165 cy_writeb(base_addr + (CyCAR << index), channel);
2166 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2167 readb(base_addr + (CySRER << index)) | CyTxRdy);
02f1175c
JS		 2168 CY_UNLOCK(info, flags);
2169 } else {
1da177e4 2170#ifdef CONFIG_CYZ_INTR
02f1175c 2171 int retval;
1da177e4 2172
02f1175c
JS		 2173 CY_LOCK(info, flags);
2174 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK,
2175 0L);
2176 if (retval != 0) {
2177 printk("cyc:start_xmit retval on ttyC%d was %x\n",
2178 info->line, retval);
2179 }
2180 CY_UNLOCK(info, flags);
2181#else /* CONFIG_CYZ_INTR */
2182 /* Don't have to do anything at this time */
2183#endif /* CONFIG_CYZ_INTR */
2184 }
2185} /* start_xmit */
1da177e4
LT		 2186
2187/*
2188 * This routine shuts down a serial port; interrupts are disabled,
2189 * and DTR is dropped if the hangup on close termio flag is on.
2190 */
02f1175c 2191static void shutdown(struct cyclades_port *info)
1da177e4 2192{
02f1175c
JS		 2193 unsigned long flags;
2194 void __iomem *base_addr;
2195 int card, chip, channel, index;
2196
2197 if (!(info->flags & ASYNC_INITIALIZED)) {
2198 return;
2199 }
2200
2201 card = info->card;
2202 channel = info->line - cy_card[card].first_line;
2203 if (!IS_CYC_Z(cy_card[card])) {
2204 chip = channel >> 2;
2205 channel &= 0x03;
2206 index = cy_card[card].bus_index;
2207 base_addr = cy_card[card].base_addr +
2208 (cy_chip_offset[chip] << index);
1da177e4
LT		 2209
2210#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2211 printk("cyc shutdown Y card %d, chip %d, channel %d, "
2212 "base_addr %lx\n",
2213 card, chip, channel, (long)base_addr);
1da177e4
LT		 2214#endif
2215
02f1175c
JS		 2216 CY_LOCK(info, flags);
2217
2218 /* Clear delta_msr_wait queue to avoid mem leaks. */
2219 wake_up_interruptible(&info->delta_msr_wait);
1da177e4 2220
02f1175c
JS		 2221 if (info->xmit_buf) {
2222 unsigned char *temp;
2223 temp = info->xmit_buf;
2224 info->xmit_buf = NULL;
2225 free_page((unsigned long)temp);
2226 }
2227 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2228 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2229 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2230 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
1da177e4 2231#ifdef CY_DEBUG_DTR
02f1175c
JS		 2232 printk("cyc shutdown dropping DTR\n");
2233 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 2234 readb(base_addr + (CyMSVR1 << index)),
2235 readb(base_addr + (CyMSVR2 << index)));
1da177e4 2236#endif
02f1175c
JS		 2237 }
2238 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2239 /* it may be appropriate to clear _XMIT at
2240 some later date (after testing)!!! */
2241
2242 if (info->tty) {
2243 set_bit(TTY_IO_ERROR, &info->tty->flags);
2244 }
2245 info->flags &= ~ASYNC_INITIALIZED;
2246 CY_UNLOCK(info, flags);
2247 } else {
2248 struct FIRM_ID __iomem *firm_id;
2249 struct ZFW_CTRL __iomem *zfw_ctrl;
2250 struct BOARD_CTRL __iomem *board_ctrl;
2251 struct CH_CTRL __iomem *ch_ctrl;
2252 int retval;
2253
2254 base_addr = cy_card[card].base_addr;
1da177e4 2255#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2256 printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
2257 card, channel, (long)base_addr);
1da177e4
LT		 2258#endif
2259
02f1175c
JS		 2260 firm_id = base_addr + ID_ADDRESS;
2261 if (!ISZLOADED(cy_card[card])) {
2262 return;
2263 }
1da177e4 2264
02f1175c 2265 zfw_ctrl = cy_card[card].base_addr +
db05c3b1 2266 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2267 board_ctrl = &zfw_ctrl->board_ctrl;
2268 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4 2269
02f1175c 2270 CY_LOCK(info, flags);
1da177e4 2271
02f1175c
JS		 2272 if (info->xmit_buf) {
2273 unsigned char *temp;
2274 temp = info->xmit_buf;
2275 info->xmit_buf = NULL;
2276 free_page((unsigned long)temp);
1da177e4 2277 }
02f1175c
JS		 2278
2279 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2280 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1 2281 (__u32)(readl(&ch_ctrl[channel].rs_control) &
02f1175c
JS		 2282 ~(C_RS_RTS | C_RS_DTR)));
2283 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2284 C_CM_IOCTLM, 0L);
2285 if (retval != 0) {
2286 printk("cyc:shutdown retval on ttyC%d was %x\n",
2287 info->line, retval);
2288 }
1da177e4 2289#ifdef CY_DEBUG_DTR
02f1175c 2290 printk("cyc:shutdown dropping Z DTR\n");
1da177e4 2291#endif
02f1175c 2292 }
1da177e4 2293
02f1175c
JS		 2294 if (info->tty) {
2295 set_bit(TTY_IO_ERROR, &info->tty->flags);
2296 }
2297 info->flags &= ~ASYNC_INITIALIZED;
2298
2299 CY_UNLOCK(info, flags);
2300 }
1da177e4
LT		 2301
2302#ifdef CY_DEBUG_OPEN
02f1175c 2303 printk(" cyc shutdown done\n");
1da177e4 2304#endif
02f1175c 2305} /* shutdown */
1da177e4
LT		 2306
2307/*
2308 * ------------------------------------------------------------
2309 * cy_open() and friends
2310 * ------------------------------------------------------------
2311 */
2312
2313static int
02f1175c
JS		 2314block_til_ready(struct tty_struct *tty, struct file *filp,
2315 struct cyclades_port *info)
1da177e4 2316{
02f1175c
JS		 2317 DECLARE_WAITQUEUE(wait, current);
2318 struct cyclades_card *cinfo;
2319 unsigned long flags;
2320 int chip, channel, index;
2321 int retval;
2322 void __iomem *base_addr;
2323
2324 cinfo = &cy_card[info->card];
2325 channel = info->line - cinfo->first_line;
2326
2327 /*
2328 * If the device is in the middle of being closed, then block
2329 * until it's done, and then try again.
2330 */
2331 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2332 if (info->flags & ASYNC_CLOSING) {
2333 interruptible_sleep_on(&info->close_wait);
2334 }
096dcfce 2335 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
1da177e4 2336 }
02f1175c
JS		 2337
2338 /*
2339 * If non-blocking mode is set, then make the check up front
2340 * and then exit.
2341 */
2342 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2343 info->flags |= ASYNC_NORMAL_ACTIVE;
2344 return 0;
2345 }
2346
2347 /*
2348 * Block waiting for the carrier detect and the line to become
2349 * free (i.e., not in use by the callout). While we are in
2350 * this loop, info->count is dropped by one, so that
2351 * cy_close() knows when to free things. We restore it upon
2352 * exit, either normal or abnormal.
2353 */
2354 retval = 0;
2355 add_wait_queue(&info->open_wait, &wait);
1da177e4 2356#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2357 printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
2358 info->line, info->count);
2359 /**/
1da177e4 2360#endif
02f1175c
JS		 2361 CY_LOCK(info, flags);
2362 if (!tty_hung_up_p(filp))
2363 info->count--;
2364 CY_UNLOCK(info, flags);
1da177e4 2365#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2366 printk("cyc block_til_ready: (%d): decrementing count to %d\n",
2367 current->pid, info->count);
1da177e4 2368#endif
02f1175c
JS		 2369 info->blocked_open++;
2370
2371 if (!IS_CYC_Z(*cinfo)) {
2372 chip = channel >> 2;
2373 channel &= 0x03;
2374 index = cinfo->bus_index;
2375 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2376
2377 while (1) {
2378 CY_LOCK(info, flags);
2379 if ((tty->termios->c_cflag & CBAUD)) {
2380 cy_writeb(base_addr + (CyCAR << index),
2381 (u_char) channel);
2382 cy_writeb(base_addr + (CyMSVR1 << index),
2383 CyRTS);
2384 cy_writeb(base_addr + (CyMSVR2 << index),
2385 CyDTR);
1da177e4 2386#ifdef CY_DEBUG_DTR
02f1175c
JS		 2387 printk("cyc:block_til_ready raising DTR\n");
2388 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 2389 readb(base_addr + (CyMSVR1 << index)),
2390 readb(base_addr + (CyMSVR2 << index)));
1da177e4 2391#endif
02f1175c
JS		 2392 }
2393 CY_UNLOCK(info, flags);
1da177e4 2394
02f1175c
JS		 2395 set_current_state(TASK_INTERRUPTIBLE);
2396 if (tty_hung_up_p(filp) ||
2397 !(info->flags & ASYNC_INITIALIZED)) {
2398 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2399 -EAGAIN : -ERESTARTSYS);
2400 break;
2401 }
1da177e4 2402
02f1175c
JS		 2403 CY_LOCK(info, flags);
2404 cy_writeb(base_addr + (CyCAR << index),
2405 (u_char) channel);
2406 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
db05c3b1 2407 (readb(base_addr +
02f1175c
JS		 2408 (CyMSVR1 << index)) & CyDCD))) {
2409 CY_UNLOCK(info, flags);
2410 break;
2411 }
1da177e4 2412 CY_UNLOCK(info, flags);
1da177e4 2413
02f1175c
JS		 2414 if (signal_pending(current)) {
2415 retval = -ERESTARTSYS;
2416 break;
2417 }
1da177e4 2418#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2419 printk("cyc block_til_ready blocking: ttyC%d, "
2420 "count = %d\n",
2421 info->line, info->count);
2422 /**/
1da177e4 2423#endif
02f1175c 2424 schedule();
1da177e4 2425 }
02f1175c
JS		 2426 } else {
2427 struct FIRM_ID __iomem *firm_id;
2428 struct ZFW_CTRL __iomem *zfw_ctrl;
2429 struct BOARD_CTRL __iomem *board_ctrl;
2430 struct CH_CTRL __iomem *ch_ctrl;
2431 int retval;
2432
2433 base_addr = cinfo->base_addr;
2434 firm_id = base_addr + ID_ADDRESS;
2435 if (!ISZLOADED(*cinfo)) {
cc0a8fbb 2436 __set_current_state(TASK_RUNNING);
02f1175c
JS		 2437 remove_wait_queue(&info->open_wait, &wait);
2438 return -EINVAL;
2439 }
2440
db05c3b1 2441 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
02f1175c
JS		 2442 board_ctrl = &zfw_ctrl->board_ctrl;
2443 ch_ctrl = zfw_ctrl->ch_ctrl;
2444
2445 while (1) {
2446 if ((tty->termios->c_cflag & CBAUD)) {
2447 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 2448 readl(&ch_ctrl[channel].rs_control) |
2449 C_RS_RTS | C_RS_DTR);
02f1175c 2450 retval = cyz_issue_cmd(&cy_card[info->card],
db05c3b1 2451 channel, C_CM_IOCTLM, 0L);
02f1175c
JS		 2452 if (retval != 0) {
2453 printk("cyc:block_til_ready retval on "
2454 "ttyC%d was %x\n",
2455 info->line, retval);
2456 }
1da177e4 2457#ifdef CY_DEBUG_DTR
02f1175c 2458 printk("cyc:block_til_ready raising Z DTR\n");
1da177e4 2459#endif
02f1175c 2460 }
1da177e4 2461
02f1175c
JS		 2462 set_current_state(TASK_INTERRUPTIBLE);
2463 if (tty_hung_up_p(filp) ||
2464 !(info->flags & ASYNC_INITIALIZED)) {
2465 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2466 -EAGAIN : -ERESTARTSYS);
2467 break;
2468 }
2469 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
db05c3b1 2470 (readl(&ch_ctrl[channel].rs_status) &
02f1175c
JS		 2471 C_RS_DCD))) {
2472 break;
2473 }
2474 if (signal_pending(current)) {
2475 retval = -ERESTARTSYS;
2476 break;
2477 }
1da177e4 2478#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2479 printk("cyc block_til_ready blocking: ttyC%d, "
2480 "count = %d\n",
2481 info->line, info->count);
2482 /**/
1da177e4 2483#endif
02f1175c
JS		 2484 schedule();
2485 }
1da177e4 2486 }
cc0a8fbb 2487 __set_current_state(TASK_RUNNING);
02f1175c
JS		 2488 remove_wait_queue(&info->open_wait, &wait);
2489 if (!tty_hung_up_p(filp)) {
2490 info->count++;
1da177e4 2491#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2492 printk("cyc:block_til_ready (%d): incrementing count to %d\n",
2493 current->pid, info->count);
1da177e4 2494#endif
02f1175c
JS		 2495 }
2496 info->blocked_open--;
1da177e4 2497#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2498 printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
2499 info->line, info->count);
2500 /**/
1da177e4 2501#endif
02f1175c
JS		 2502 if (retval)
2503 return retval;
2504 info->flags |= ASYNC_NORMAL_ACTIVE;
2505 return 0;
2506} /* block_til_ready */
1da177e4
LT		 2507
2508/*
2509 * This routine is called whenever a serial port is opened. It
2510 * performs the serial-specific initialization for the tty structure.
2511 */
02f1175c 2512static int cy_open(struct tty_struct *tty, struct file *filp)
1da177e4 2513{
02f1175c
JS		 2514 struct cyclades_port *info;
2515 int retval, line;
1da177e4 2516
02f1175c
JS		 2517 line = tty->index;
2518 if ((line < 0) || (NR_PORTS <= line)) {
2519 return -ENODEV;
2520 }
2521 info = &cy_port[line];
2522 if (info->line < 0) {
2523 return -ENODEV;
2524 }
1da177e4 2525
02f1175c
JS		 2526 /* If the card's firmware hasn't been loaded,
2527 treat it as absent from the system. This
2528 will make the user pay attention.
2529 */
2530 if (IS_CYC_Z(cy_card[info->card])) {
2531 struct cyclades_card *cinfo = &cy_card[info->card];
2532 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2533
2534 if (!ISZLOADED(*cinfo)) {
db05c3b1 2535 if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
02f1175c
JS		 2536 (cinfo->ctl_addr))->mail_box_0)) &&
2537 Z_FPGA_CHECK(*cinfo)) &&
db05c3b1 2538 (ZFIRM_HLT == readl(
02f1175c
JS		 2539 &firm_id->signature))) {
2540 printk("cyc:Cyclades-Z Error: you need an "
2541 "external power supply for this number "
2542 "of ports.\n\rFirmware halted.\r\n");
2543 } else {
2544 printk("cyc:Cyclades-Z firmware not yet "
2545 "loaded\n");
2546 }
2547 return -ENODEV;
2548 }
2549#ifdef CONFIG_CYZ_INTR
2550 else {
2551 /* In case this Z board is operating in interrupt mode, its
2552 interrupts should be enabled as soon as the first open
2553 happens to one of its ports. */
2554 if (!cinfo->intr_enabled) {
2555 struct ZFW_CTRL __iomem *zfw_ctrl;
2556 struct BOARD_CTRL __iomem *board_ctrl;
2557
2558 zfw_ctrl = cinfo->base_addr +
db05c3b1
JS		 2559 (readl(&firm_id->zfwctrl_addr) &
2560 0xfffff);
02f1175c
JS		 2561
2562 board_ctrl = &zfw_ctrl->board_ctrl;
2563
2564 /* Enable interrupts on the PLX chip */
2565 cy_writew(cinfo->ctl_addr + 0x68,
db05c3b1 2566 readw(cinfo->ctl_addr + 0x68) | 0x0900);
02f1175c
JS		 2567 /* Enable interrupts on the FW */
2568 retval = cyz_issue_cmd(cinfo, 0,
2569 C_CM_IRQ_ENBL, 0L);
2570 if (retval != 0) {
2571 printk("cyc:IRQ enable retval was %x\n",
2572 retval);
2573 }
2574 cinfo->nports =
db05c3b1 2575 (int)readl(&board_ctrl->n_channel);
02f1175c
JS		 2576 cinfo->intr_enabled = 1;
2577 }
1da177e4 2578 }
02f1175c
JS		 2579#endif /* CONFIG_CYZ_INTR */
2580 /* Make sure this Z port really exists in hardware */
2581 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2582 return -ENODEV;
1da177e4 2583 }
1da177e4 2584#ifdef CY_DEBUG_OTHER
02f1175c 2585 printk("cyc:cy_open ttyC%d\n", info->line); /* */
1da177e4 2586#endif
02f1175c
JS		 2587 tty->driver_data = info;
2588 info->tty = tty;
2589 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2590 return -ENODEV;
2591 }
1da177e4 2592#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2593 printk("cyc:cy_open ttyC%d, count = %d\n", info->line, info->count);
2594 /**/
1da177e4 2595#endif
02f1175c 2596 info->count++;
1da177e4 2597#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2598 printk("cyc:cy_open (%d): incrementing count to %d\n",
2599 current->pid, info->count);
1da177e4 2600#endif
1da177e4 2601
02f1175c
JS		 2602 /*
2603 * If the port is the middle of closing, bail out now
2604 */
2605 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2606 if (info->flags & ASYNC_CLOSING)
2607 interruptible_sleep_on(&info->close_wait);
096dcfce 2608 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
02f1175c 2609 }
1da177e4 2610
02f1175c
JS		 2611 /*
2612 * Start up serial port
2613 */
2614 retval = startup(info);
2615 if (retval) {
2616 return retval;
2617 }
1da177e4 2618
02f1175c
JS		 2619 retval = block_til_ready(tty, filp, info);
2620 if (retval) {
1da177e4 2621#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2622 printk("cyc:cy_open returning after block_til_ready with %d\n",
2623 retval);
1da177e4 2624#endif
02f1175c
JS		 2625 return retval;
2626 }
1da177e4 2627
02f1175c 2628 info->throttle = 0;
1da177e4 2629
02f1175c
JS		 2630#ifdef CY_DEBUG_OPEN
2631 printk(" cyc:cy_open done\n");
2632 /**/
2633#endif
2634 return 0;
2635} /* cy_open */
1da177e4
LT		 2636
2637/*
2638 * cy_wait_until_sent() --- wait until the transmitter is empty
2639 */
02f1175c 2640static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
1da177e4 2641{
02f1175c
JS		 2642 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2643 void __iomem *base_addr;
2644 int card, chip, channel, index;
2645 unsigned long orig_jiffies;
2646 int char_time;
2647
2648 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2649 return;
2650
2651 if (info->xmit_fifo_size == 0)
2652 return; /* Just in case.... */
1da177e4 2653
02f1175c
JS		 2654 orig_jiffies = jiffies;
2655 /*
2656 * Set the check interval to be 1/5 of the estimated time to
2657 * send a single character, and make it at least 1. The check
2658 * interval should also be less than the timeout.
2659 *
2660 * Note: we have to use pretty tight timings here to satisfy
2661 * the NIST-PCTS.
2662 */
2663 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2664 char_time = char_time / 5;
2665 if (char_time <= 0)
2666 char_time = 1;
2667 if (timeout < 0)
2668 timeout = 0;
2669 if (timeout)
2670 char_time = min(char_time, timeout);
2671 /*
2672 * If the transmitter hasn't cleared in twice the approximate
2673 * amount of time to send the entire FIFO, it probably won't
2674 * ever clear. This assumes the UART isn't doing flow
2675 * control, which is currently the case. Hence, if it ever
2676 * takes longer than info->timeout, this is probably due to a
2677 * UART bug of some kind. So, we clamp the timeout parameter at
2678 * 2*info->timeout.
2679 */
2680 if (!timeout || timeout > 2 * info->timeout)
2681 timeout = 2 * info->timeout;
1da177e4 2682#ifdef CY_DEBUG_WAIT_UNTIL_SENT
02f1175c
JS		 2683 printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
2684 printk("jiff=%lu...", jiffies);
1da177e4 2685#endif
02f1175c
JS		 2686 card = info->card;
2687 channel = (info->line) - (cy_card[card].first_line);
2688 if (!IS_CYC_Z(cy_card[card])) {
2689 chip = channel >> 2;
2690 channel &= 0x03;
2691 index = cy_card[card].bus_index;
2692 base_addr =
2693 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
db05c3b1 2694 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
1da177e4 2695#ifdef CY_DEBUG_WAIT_UNTIL_SENT
02f1175c 2696 printk("Not clean (jiff=%lu)...", jiffies);
1da177e4 2697#endif
02f1175c
JS		 2698 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2699 break;
2700 if (timeout && time_after(jiffies, orig_jiffies +
2701 timeout))
2702 break;
2703 }
2704 } else {
096dcfce 2705 /* Nothing to do! */
1da177e4 2706 }
02f1175c
JS		 2707 /* Run one more char cycle */
2708 msleep_interruptible(jiffies_to_msecs(char_time * 5));
1da177e4 2709#ifdef CY_DEBUG_WAIT_UNTIL_SENT
02f1175c 2710 printk("Clean (jiff=%lu)...done\n", jiffies);
1da177e4
LT		 2711#endif
2712}
2713
2714/*
2715 * This routine is called when a particular tty device is closed.
2716 */
02f1175c 2717static void cy_close(struct tty_struct *tty, struct file *filp)
1da177e4 2718{
02f1175c
JS		 2719 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2720 unsigned long flags;
1da177e4
LT		 2721
2722#ifdef CY_DEBUG_OTHER
02f1175c 2723 printk("cyc:cy_close ttyC%d\n", info->line);
1da177e4
LT		 2724#endif
2725
02f1175c
JS		 2726 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2727 return;
2728 }
1da177e4 2729
02f1175c
JS		 2730 CY_LOCK(info, flags);
2731 /* If the TTY is being hung up, nothing to do */
2732 if (tty_hung_up_p(filp)) {
2733 CY_UNLOCK(info, flags);
2734 return;
2735 }
1da177e4 2736#ifdef CY_DEBUG_OPEN
02f1175c 2737 printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
1da177e4 2738#endif
02f1175c
JS		 2739 if ((tty->count == 1) && (info->count != 1)) {
2740 /*
2741 * Uh, oh. tty->count is 1, which means that the tty
2742 * structure will be freed. Info->count should always
2743 * be one in these conditions. If it's greater than
2744 * one, we've got real problems, since it means the
2745 * serial port won't be shutdown.
2746 */
2747 printk("cyc:cy_close: bad serial port count; tty->count is 1, "
2748 "info->count is %d\n", info->count);
2749 info->count = 1;
2750 }
1da177e4 2751#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2752 printk("cyc:cy_close at (%d): decrementing count to %d\n",
2753 current->pid, info->count - 1);
1da177e4 2754#endif
02f1175c 2755 if (--info->count < 0) {
1da177e4 2756#ifdef CY_DEBUG_COUNT
02f1175c 2757 printk("cyc:cyc_close setting count to 0\n");
1da177e4 2758#endif
02f1175c 2759 info->count = 0;
1da177e4 2760 }
02f1175c
JS		 2761 if (info->count) {
2762 CY_UNLOCK(info, flags);
2763 return;
2764 }
2765 info->flags |= ASYNC_CLOSING;
1da177e4 2766
02f1175c
JS		 2767 /*
2768 * Now we wait for the transmit buffer to clear; and we notify
2769 * the line discipline to only process XON/XOFF characters.
2770 */
2771 tty->closing = 1;
2772 CY_UNLOCK(info, flags);
2773 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2774 tty_wait_until_sent(tty, info->closing_wait);
1da177e4 2775 }
02f1175c
JS		 2776 CY_LOCK(info, flags);
2777
2778 if (!IS_CYC_Z(cy_card[info->card])) {
2779 int channel = info->line - cy_card[info->card].first_line;
2780 int index = cy_card[info->card].bus_index;
2781 void __iomem *base_addr = cy_card[info->card].base_addr +
2782 (cy_chip_offset[channel >> 2] << index);
2783 /* Stop accepting input */
2784 channel &= 0x03;
2785 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2786 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2787 readb(base_addr + (CySRER << index)) & ~CyRxData);
02f1175c
JS		 2788 if (info->flags & ASYNC_INITIALIZED) {
2789 /* Waiting for on-board buffers to be empty before closing
2790 the port */
2791 CY_UNLOCK(info, flags);
2792 cy_wait_until_sent(tty, info->timeout);
2793 CY_LOCK(info, flags);
2794 }
2795 } else {
2796#ifdef Z_WAKE
2797 /* Waiting for on-board buffers to be empty before closing the port */
2798 void __iomem *base_addr = cy_card[info->card].base_addr;
2799 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2800 struct ZFW_CTRL __iomem *zfw_ctrl =
db05c3b1 2801 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2802 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2803 int channel = info->line - cy_card[info->card].first_line;
2804 int retval;
2805
db05c3b1 2806 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
02f1175c
JS		 2807 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2808 C_CM_IOCTLW, 0L);
2809 if (retval != 0) {
2810 printk("cyc:cy_close retval on ttyC%d was %x\n",
2811 info->line, retval);
2812 }
2813 CY_UNLOCK(info, flags);
2814 interruptible_sleep_on(&info->shutdown_wait);
2815 CY_LOCK(info, flags);
2816 }
1da177e4 2817#endif
02f1175c
JS		 2818 }
2819
1da177e4 2820 CY_UNLOCK(info, flags);
02f1175c
JS		 2821 shutdown(info);
2822 if (tty->driver->flush_buffer)
2823 tty->driver->flush_buffer(tty);
2824 tty_ldisc_flush(tty);
1da177e4 2825 CY_LOCK(info, flags);
02f1175c
JS		 2826
2827 tty->closing = 0;
2828 info->event = 0;
2829 info->tty = NULL;
2830 if (info->blocked_open) {
2831 CY_UNLOCK(info, flags);
2832 if (info->close_delay) {
2833 msleep_interruptible(jiffies_to_msecs
2834 (info->close_delay));
2835 }
2836 wake_up_interruptible(&info->open_wait);
2837 CY_LOCK(info, flags);
2838 }
2839 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2840 wake_up_interruptible(&info->close_wait);
1da177e4
LT		 2841
2842#ifdef CY_DEBUG_OTHER
02f1175c 2843 printk(" cyc:cy_close done\n");
1da177e4
LT		 2844#endif
2845
02f1175c 2846 CY_UNLOCK(info, flags);
02f1175c 2847} /* cy_close */
1da177e4
LT		 2848
2849/* This routine gets called when tty_write has put something into
2850 * the write_queue. The characters may come from user space or
2851 * kernel space.
2852 *
2853 * This routine will return the number of characters actually
2854 * accepted for writing.
2855 *
2856 * If the port is not already transmitting stuff, start it off by
2857 * enabling interrupts. The interrupt service routine will then
2858 * ensure that the characters are sent.
2859 * If the port is already active, there is no need to kick it.
2860 *
2861 */
02f1175c 2862static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1da177e4 2863{
02f1175c
JS		 2864 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2865 unsigned long flags;
2866 int c, ret = 0;
1da177e4
LT		 2867
2868#ifdef CY_DEBUG_IO
02f1175c 2869 printk("cyc:cy_write ttyC%d\n", info->line); /* */
1da177e4
LT		 2870#endif
2871
02f1175c
JS		 2872 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2873 return 0;
2874 }
1da177e4 2875
02f1175c
JS		 2876 if (!info->xmit_buf)
2877 return 0;
1da177e4 2878
02f1175c
JS		 2879 CY_LOCK(info, flags);
2880 while (1) {
2881 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2882 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2883
2884 if (c <= 0)
2885 break;
2886
2887 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2888 info->xmit_head = (info->xmit_head + c) &
2889 (SERIAL_XMIT_SIZE - 1);
2890 info->xmit_cnt += c;
2891 buf += c;
2892 count -= c;
2893 ret += c;
2894 }
2895 CY_UNLOCK(info, flags);
2896
2897 info->idle_stats.xmit_bytes += ret;
2898 info->idle_stats.xmit_idle = jiffies;
2899
2900 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2901 start_xmit(info);
2902 }
2903 return ret;
2904} /* cy_write */
1da177e4
LT		 2905
2906/*
2907 * This routine is called by the kernel to write a single
2908 * character to the tty device. If the kernel uses this routine,
2909 * it must call the flush_chars() routine (if defined) when it is
2910 * done stuffing characters into the driver. If there is no room
2911 * in the queue, the character is ignored.
2912 */
02f1175c 2913static void cy_put_char(struct tty_struct *tty, unsigned char ch)
1da177e4 2914{
02f1175c
JS		 2915 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2916 unsigned long flags;
1da177e4
LT		 2917
2918#ifdef CY_DEBUG_IO
02f1175c 2919 printk("cyc:cy_put_char ttyC%d\n", info->line);
1da177e4
LT		 2920#endif
2921
02f1175c
JS		 2922 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2923 return;
1da177e4 2924
02f1175c
JS		 2925 if (!info->xmit_buf)
2926 return;
1da177e4 2927
02f1175c 2928 CY_LOCK(info, flags);
90cc3018 2929 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
02f1175c
JS		 2930 CY_UNLOCK(info, flags);
2931 return;
2932 }
1da177e4 2933
02f1175c
JS		 2934 info->xmit_buf[info->xmit_head++] = ch;
2935 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2936 info->xmit_cnt++;
1da177e4
LT		 2937 info->idle_stats.xmit_bytes++;
2938 info->idle_stats.xmit_idle = jiffies;
02f1175c
JS		 2939 CY_UNLOCK(info, flags);
2940} /* cy_put_char */
1da177e4
LT		 2941
2942/*
2943 * This routine is called by the kernel after it has written a
2944 * series of characters to the tty device using put_char().
2945 */
02f1175c 2946static void cy_flush_chars(struct tty_struct *tty)
1da177e4 2947{
02f1175c
JS		 2948 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2949
1da177e4 2950#ifdef CY_DEBUG_IO
02f1175c 2951 printk("cyc:cy_flush_chars ttyC%d\n", info->line); /* */
1da177e4
LT		 2952#endif
2953
02f1175c
JS		 2954 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2955 return;
1da177e4 2956
02f1175c
JS		 2957 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2958 !info->xmit_buf)
2959 return;
1da177e4 2960
02f1175c
JS		 2961 start_xmit(info);
2962} /* cy_flush_chars */
1da177e4
LT		 2963
2964/*
2965 * This routine returns the numbers of characters the tty driver
2966 * will accept for queuing to be written. This number is subject
2967 * to change as output buffers get emptied, or if the output flow
2968 * control is activated.
2969 */
02f1175c 2970static int cy_write_room(struct tty_struct *tty)
1da177e4 2971{
02f1175c
JS		 2972 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2973 int ret;
2974
1da177e4 2975#ifdef CY_DEBUG_IO
02f1175c 2976 printk("cyc:cy_write_room ttyC%d\n", info->line); /* */
1da177e4
LT		 2977#endif
2978
02f1175c
JS		 2979 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2980 return 0;
2981 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2982 if (ret < 0)
2983 ret = 0;
2984 return ret;
2985} /* cy_write_room */
1da177e4 2986
02f1175c 2987static int cy_chars_in_buffer(struct tty_struct *tty)
1da177e4 2988{
02f1175c
JS		 2989 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2990 int card, channel;
1da177e4 2991
02f1175c
JS		 2992 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2993 return 0;
2994
2995 card = info->card;
2996 channel = (info->line) - (cy_card[card].first_line);
1da177e4
LT		 2997
2998#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c
JS		 2999 if (!IS_CYC_Z(cy_card[card])) {
3000#endif /* Z_EXT_CHARS_IN_BUFFER */
1da177e4 3001#ifdef CY_DEBUG_IO
02f1175c 3002 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt); /* */
1da177e4 3003#endif
02f1175c 3004 return info->xmit_cnt;
1da177e4 3005#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c
JS		 3006 } else {
3007 static volatile struct FIRM_ID *firm_id;
3008 static volatile struct ZFW_CTRL *zfw_ctrl;
3009 static volatile struct CH_CTRL *ch_ctrl;
3010 static volatile struct BUF_CTRL *buf_ctrl;
3011 int char_count;
1a86b5e3 3012 volatile __u32 tx_put, tx_get, tx_bufsize;
02f1175c
JS		 3013
3014 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3015 zfw_ctrl = cy_card[card].base_addr +
db05c3b1 3016 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3017 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3018 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3019
db05c3b1
JS		 3020 tx_get = readl(&buf_ctrl->tx_get);
3021 tx_put = readl(&buf_ctrl->tx_put);
3022 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
02f1175c
JS		 3023 if (tx_put >= tx_get)
3024 char_count = tx_put - tx_get;
3025 else
3026 char_count = tx_put - tx_get + tx_bufsize;
1da177e4 3027#ifdef CY_DEBUG_IO
02f1175c 3028 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt + char_count); /* */
1da177e4 3029#endif
096dcfce 3030 return info->xmit_cnt + char_count;
02f1175c
JS		 3031 }
3032#endif /* Z_EXT_CHARS_IN_BUFFER */
3033} /* cy_chars_in_buffer */
1da177e4
LT		 3034
3035/*
3036 * ------------------------------------------------------------
3037 * cy_ioctl() and friends
3038 * ------------------------------------------------------------
3039 */
3040
1a86b5e3 3041static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
1da177e4 3042{
02f1175c 3043 int co, co_val, bpr;
1a86b5e3 3044 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
02f1175c 3045 25000000);
1da177e4 3046
02f1175c
JS		 3047 if (baud == 0) {
3048 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3049 return;
3050 }
1da177e4 3051
02f1175c
JS		 3052 /* determine which prescaler to use */
3053 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3054 if (cy_clock / co_val / baud > 63)
3055 break;
3056 }
1da177e4 3057
02f1175c
JS		 3058 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3059 if (bpr > 255)
3060 bpr = 255;
1da177e4 3061
02f1175c
JS		 3062 info->tbpr = info->rbpr = bpr;
3063 info->tco = info->rco = co;
1da177e4
LT		 3064}
3065
3066/*
3067 * This routine finds or computes the various line characteristics.
3068 * It used to be called config_setup
3069 */
02f1175c 3070static void set_line_char(struct cyclades_port *info)
1da177e4 3071{
02f1175c
JS		 3072 unsigned long flags;
3073 void __iomem *base_addr;
3074 int card, chip, channel, index;
3075 unsigned cflag, iflag;
3076 unsigned short chip_number;
3077 int baud, baud_rate = 0;
3078 int i;
3079
3080 if (!info->tty || !info->tty->termios) {
3081 return;
1da177e4 3082 }
02f1175c
JS		 3083 if (info->line == -1) {
3084 return;
1da177e4 3085 }
02f1175c
JS		 3086 cflag = info->tty->termios->c_cflag;
3087 iflag = info->tty->termios->c_iflag;
1da177e4 3088
02f1175c
JS		 3089 /*
3090 * Set up the tty->alt_speed kludge
3091 */
3092 if (info->tty) {
3093 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3094 info->tty->alt_speed = 57600;
3095 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3096 info->tty->alt_speed = 115200;
3097 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3098 info->tty->alt_speed = 230400;
3099 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3100 info->tty->alt_speed = 460800;
1da177e4 3101 }
02f1175c
JS		 3102
3103 card = info->card;
3104 channel = (info->line) - (cy_card[card].first_line);
3105 chip_number = channel / 4;
3106
3107 if (!IS_CYC_Z(cy_card[card])) {
3108
3109 index = cy_card[card].bus_index;
3110
3111 /* baud rate */
3112 baud = tty_get_baud_rate(info->tty);
3113 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3114 ASYNC_SPD_CUST) {
3115 if (info->custom_divisor)
3116 baud_rate = info->baud / info->custom_divisor;
3117 else
3118 baud_rate = info->baud;
3119 } else if (baud > CD1400_MAX_SPEED) {
3120 baud = CD1400_MAX_SPEED;
3121 }
3122 /* find the baud index */
3123 for (i = 0; i < 20; i++) {
3124 if (baud == baud_table[i]) {
3125 break;
3126 }
3127 }
3128 if (i == 20) {
3129 i = 19; /* CD1400_MAX_SPEED */
3130 }
3131
3132 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3133 ASYNC_SPD_CUST) {
3134 cyy_baud_calc(info, baud_rate);
3135 } else {
3136 if (info->chip_rev >= CD1400_REV_J) {
3137 /* It is a CD1400 rev. J or later */
3138 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3139 info->tco = baud_co_60[i]; /* Tx CO */
3140 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3141 info->rco = baud_co_60[i]; /* Rx CO */
3142 } else {
3143 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3144 info->tco = baud_co_25[i]; /* Tx CO */
3145 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3146 info->rco = baud_co_25[i]; /* Rx CO */
3147 }
3148 }
3149 if (baud_table[i] == 134) {
3150 /* get it right for 134.5 baud */
3151 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3152 2;
3153 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3154 ASYNC_SPD_CUST) {
3155 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3156 baud_rate) + 2;
3157 } else if (baud_table[i]) {
3158 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3159 baud_table[i]) + 2;
3160 /* this needs to be propagated into the card info */
3161 } else {
3162 info->timeout = 0;
3163 }
3164 /* By tradition (is it a standard?) a baud rate of zero
3165 implies the line should be/has been closed. A bit
3166 later in this routine such a test is performed. */
3167
3168 /* byte size and parity */
3169 info->cor5 = 0;
3170 info->cor4 = 0;
3171 /* receive threshold */
3172 info->cor3 = (info->default_threshold ?
3173 info->default_threshold : baud_cor3[i]);
3174 info->cor2 = CyETC;
3175 switch (cflag & CSIZE) {
3176 case CS5:
3177 info->cor1 = Cy_5_BITS;
3178 break;
3179 case CS6:
3180 info->cor1 = Cy_6_BITS;
3181 break;
3182 case CS7:
3183 info->cor1 = Cy_7_BITS;
3184 break;
3185 case CS8:
3186 info->cor1 = Cy_8_BITS;
3187 break;
3188 }
3189 if (cflag & CSTOPB) {
3190 info->cor1 |= Cy_2_STOP;
3191 }
3192 if (cflag & PARENB) {
3193 if (cflag & PARODD) {
3194 info->cor1 |= CyPARITY_O;
3195 } else {
3196 info->cor1 |= CyPARITY_E;
3197 }
3198 } else {
3199 info->cor1 |= CyPARITY_NONE;
3200 }
3201
3202 /* CTS flow control flag */
3203 if (cflag & CRTSCTS) {
3204 info->flags |= ASYNC_CTS_FLOW;
3205 info->cor2 |= CyCtsAE;
3206 } else {
3207 info->flags &= ~ASYNC_CTS_FLOW;
3208 info->cor2 &= ~CyCtsAE;
3209 }
3210 if (cflag & CLOCAL)
3211 info->flags &= ~ASYNC_CHECK_CD;
3212 else
3213 info->flags |= ASYNC_CHECK_CD;
1da177e4
LT		 3214
3215 /***********************************************
3216 The hardware option, CyRtsAO, presents RTS when
3217 the chip has characters to send. Since most modems
3218 use RTS as reverse (inbound) flow control, this
3219 option is not used. If inbound flow control is
3220 necessary, DTR can be programmed to provide the
3221 appropriate signals for use with a non-standard
3222 cable. Contact Marcio Saito for details.
3223 ***********************************************/
3224
02f1175c
JS		 3225 chip = channel >> 2;
3226 channel &= 0x03;
3227 base_addr = cy_card[card].base_addr +
3228 (cy_chip_offset[chip] << index);
1da177e4 3229
02f1175c
JS		 3230 CY_LOCK(info, flags);
3231 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3232
3233 /* tx and rx baud rate */
3234
3235 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3236 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3237 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3238 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3239
3240 /* set line characteristics according configuration */
3241
3242 cy_writeb(base_addr + (CySCHR1 << index),
3243 START_CHAR(info->tty));
3244 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3245 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3246 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3247 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3248 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3249 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3250
3251 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3252 CyCOR3ch, index);
3253
3254 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3255 cy_writeb(base_addr + (CyRTPR << index),
3256 (info->default_timeout ? info->default_timeout : 0x02));
3257 /* 10ms rx timeout */
3258
3259 if (C_CLOCAL(info->tty)) {
3260 /* without modem intr */
3261 cy_writeb(base_addr + (CySRER << index),
db05c3b1 3262 readb(base_addr + (CySRER << index)) | CyMdmCh);
02f1175c
JS		 3263 /* act on 1->0 modem transitions */
3264 if ((cflag & CRTSCTS) && info->rflow) {
3265 cy_writeb(base_addr + (CyMCOR1 << index),
3266 (CyCTS | rflow_thr[i]));
3267 } else {
3268 cy_writeb(base_addr + (CyMCOR1 << index),
3269 CyCTS);
3270 }
3271 /* act on 0->1 modem transitions */
3272 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
1da177e4 3273 } else {
02f1175c
JS		 3274 /* without modem intr */
3275 cy_writeb(base_addr + (CySRER << index),
db05c3b1 3276 readb(base_addr +
02f1175c
JS		 3277 (CySRER << index)) | CyMdmCh);
3278 /* act on 1->0 modem transitions */
3279 if ((cflag & CRTSCTS) && info->rflow) {
3280 cy_writeb(base_addr + (CyMCOR1 << index),
3281 (CyDSR | CyCTS | CyRI | CyDCD |
3282 rflow_thr[i]));
3283 } else {
3284 cy_writeb(base_addr + (CyMCOR1 << index),
3285 CyDSR | CyCTS | CyRI | CyDCD);
3286 }
3287 /* act on 0->1 modem transitions */
3288 cy_writeb(base_addr + (CyMCOR2 << index),
3289 CyDSR | CyCTS | CyRI | CyDCD);
1da177e4 3290 }
02f1175c
JS		 3291
3292 if (i == 0) { /* baud rate is zero, turn off line */
3293 if (info->rtsdtr_inv) {
3294 cy_writeb(base_addr + (CyMSVR1 << index),
3295 ~CyRTS);
3296 } else {
3297 cy_writeb(base_addr + (CyMSVR2 << index),
3298 ~CyDTR);
3299 }
1da177e4 3300#ifdef CY_DEBUG_DTR
02f1175c
JS		 3301 printk("cyc:set_line_char dropping DTR\n");
3302 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 3303 readb(base_addr + (CyMSVR1 << index)),
3304 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3305#endif
02f1175c
JS		 3306 } else {
3307 if (info->rtsdtr_inv) {
3308 cy_writeb(base_addr + (CyMSVR1 << index),
3309 CyRTS);
3310 } else {
3311 cy_writeb(base_addr + (CyMSVR2 << index),
3312 CyDTR);
3313 }
1da177e4 3314#ifdef CY_DEBUG_DTR
02f1175c
JS		 3315 printk("cyc:set_line_char raising DTR\n");
3316 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 3317 readb(base_addr + (CyMSVR1 << index)),
3318 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3319#endif
02f1175c 3320 }
1da177e4 3321
02f1175c
JS		 3322 if (info->tty) {
3323 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3324 }
3325 CY_UNLOCK(info, flags);
1da177e4 3326
1da177e4 3327 } else {
02f1175c
JS		 3328 struct FIRM_ID __iomem *firm_id;
3329 struct ZFW_CTRL __iomem *zfw_ctrl;
3330 struct BOARD_CTRL __iomem *board_ctrl;
3331 struct CH_CTRL __iomem *ch_ctrl;
3332 struct BUF_CTRL __iomem *buf_ctrl;
1a86b5e3 3333 __u32 sw_flow;
02f1175c 3334 int retval;
1da177e4 3335
02f1175c
JS		 3336 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3337 if (!ISZLOADED(cy_card[card])) {
3338 return;
3339 }
1da177e4 3340
02f1175c 3341 zfw_ctrl = cy_card[card].base_addr +
db05c3b1 3342 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3343 board_ctrl = &zfw_ctrl->board_ctrl;
3344 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3345 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3346
3347 /* baud rate */
3348 baud = tty_get_baud_rate(info->tty);
3349 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3350 ASYNC_SPD_CUST) {
3351 if (info->custom_divisor)
3352 baud_rate = info->baud / info->custom_divisor;
3353 else
3354 baud_rate = info->baud;
3355 } else if (baud > CYZ_MAX_SPEED) {
3356 baud = CYZ_MAX_SPEED;
3357 }
3358 cy_writel(&ch_ctrl->comm_baud, baud);
3359
3360 if (baud == 134) {
3361 /* get it right for 134.5 baud */
3362 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3363 2;
3364 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3365 ASYNC_SPD_CUST) {
3366 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3367 baud_rate) + 2;
3368 } else if (baud) {
3369 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3370 baud) + 2;
3371 /* this needs to be propagated into the card info */
3372 } else {
3373 info->timeout = 0;
3374 }
1da177e4 3375
02f1175c
JS		 3376 /* byte size and parity */
3377 switch (cflag & CSIZE) {
3378 case CS5:
3379 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3380 break;
3381 case CS6:
3382 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3383 break;
3384 case CS7:
3385 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3386 break;
3387 case CS8:
3388 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3389 break;
3390 }
3391 if (cflag & CSTOPB) {
3392 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 3393 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
02f1175c
JS		 3394 } else {
3395 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 3396 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
02f1175c
JS		 3397 }
3398 if (cflag & PARENB) {
3399 if (cflag & PARODD) {
3400 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3401 } else {
3402 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3403 }
3404 } else {
3405 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3406 }
1da177e4 3407
02f1175c
JS		 3408 /* CTS flow control flag */
3409 if (cflag & CRTSCTS) {
3410 cy_writel(&ch_ctrl->hw_flow,
db05c3b1 3411 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
02f1175c 3412 } else {
db05c3b1
JS		 3413 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3414 ~(C_RS_CTS | C_RS_RTS));
02f1175c
JS		 3415 }
3416 /* As the HW flow control is done in firmware, the driver
3417 doesn't need to care about it */
3418 info->flags &= ~ASYNC_CTS_FLOW;
3419
3420 /* XON/XOFF/XANY flow control flags */
3421 sw_flow = 0;
3422 if (iflag & IXON) {
3423 sw_flow |= C_FL_OXX;
3424 if (iflag & IXANY)
3425 sw_flow |= C_FL_OIXANY;
3426 }
3427 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3428
3429 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
3430 if (retval != 0) {
3431 printk("cyc:set_line_char retval on ttyC%d was %x\n",
3432 info->line, retval);
3433 }
3434
3435 /* CD sensitivity */
3436 if (cflag & CLOCAL) {
3437 info->flags &= ~ASYNC_CHECK_CD;
3438 } else {
3439 info->flags |= ASYNC_CHECK_CD;
3440 }
1da177e4 3441
02f1175c
JS		 3442 if (baud == 0) { /* baud rate is zero, turn off line */
3443 cy_writel(&ch_ctrl->rs_control,
db05c3b1 3444 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
1da177e4 3445#ifdef CY_DEBUG_DTR
02f1175c 3446 printk("cyc:set_line_char dropping Z DTR\n");
1da177e4 3447#endif
02f1175c
JS		 3448 } else {
3449 cy_writel(&ch_ctrl->rs_control,
db05c3b1 3450 readl(&ch_ctrl->rs_control) | C_RS_DTR);
1da177e4 3451#ifdef CY_DEBUG_DTR
02f1175c 3452 printk("cyc:set_line_char raising Z DTR\n");
1da177e4 3453#endif
02f1175c 3454 }
1da177e4 3455
02f1175c
JS		 3456 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTLM,0L);
3457 if (retval != 0) {
3458 printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
3459 info->line, retval);
3460 }
1da177e4 3461
02f1175c
JS		 3462 if (info->tty) {
3463 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3464 }
1da177e4 3465 }
02f1175c 3466} /* set_line_char */
1da177e4
LT		 3467
3468static int
02f1175c
JS		 3469get_serial_info(struct cyclades_port *info,
3470 struct serial_struct __user * retinfo)
1da177e4 3471{
02f1175c
JS		 3472 struct serial_struct tmp;
3473 struct cyclades_card *cinfo = &cy_card[info->card];
1da177e4 3474
02f1175c
JS		 3475 if (!retinfo)
3476 return -EFAULT;
3477 memset(&tmp, 0, sizeof(tmp));
3478 tmp.type = info->type;
3479 tmp.line = info->line;
3480 tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
3481 tmp.irq = cinfo->irq;
3482 tmp.flags = info->flags;
3483 tmp.close_delay = info->close_delay;
d5dedf99 3484 tmp.closing_wait = info->closing_wait;
02f1175c
JS		 3485 tmp.baud_base = info->baud;
3486 tmp.custom_divisor = info->custom_divisor;
3487 tmp.hub6 = 0; /*!!! */
3488 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3489} /* get_serial_info */
1da177e4
LT		 3490
3491static int
02f1175c
JS		 3492set_serial_info(struct cyclades_port *info,
3493 struct serial_struct __user * new_info)
1da177e4 3494{
02f1175c
JS		 3495 struct serial_struct new_serial;
3496 struct cyclades_port old_info;
3497
3498 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3499 return -EFAULT;
3500 old_info = *info;
3501
3502 if (!capable(CAP_SYS_ADMIN)) {
3503 if (new_serial.close_delay != info->close_delay ||
3504 new_serial.baud_base != info->baud ||
3505 (new_serial.flags & ASYNC_FLAGS &
3506 ~ASYNC_USR_MASK) !=
3507 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3508 return -EPERM;
3509 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3510 (new_serial.flags & ASYNC_USR_MASK);
3511 info->baud = new_serial.baud_base;
3512 info->custom_divisor = new_serial.custom_divisor;
3513 goto check_and_exit;
3514 }
3515
3516 /*
3517 * OK, past this point, all the error checking has been done.
3518 * At this point, we start making changes.....
3519 */
3520
3521 info->baud = new_serial.baud_base;
3522 info->custom_divisor = new_serial.custom_divisor;
3523 info->flags = (info->flags & ~ASYNC_FLAGS) |
3524 (new_serial.flags & ASYNC_FLAGS);
3525 info->close_delay = new_serial.close_delay * HZ / 100;
3526 info->closing_wait = new_serial.closing_wait * HZ / 100;
1da177e4
LT		 3527
3528check_and_exit:
02f1175c
JS		 3529 if (info->flags & ASYNC_INITIALIZED) {
3530 set_line_char(info);
3531 return 0;
3532 } else {
3533 return startup(info);
3534 }
3535} /* set_serial_info */
1da177e4
LT		 3536
3537/*
3538 * get_lsr_info - get line status register info
3539 *
3540 * Purpose: Let user call ioctl() to get info when the UART physically
3541 * is emptied. On bus types like RS485, the transmitter must
3542 * release the bus after transmitting. This must be done when
3543 * the transmit shift register is empty, not be done when the
3544 * transmit holding register is empty. This functionality
3545 * allows an RS485 driver to be written in user space.
3546 */
02f1175c 3547static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
1da177e4 3548{
02f1175c
JS		 3549 int card, chip, channel, index;
3550 unsigned char status;
3551 unsigned int result;
3552 unsigned long flags;
3553 void __iomem *base_addr;
1da177e4 3554
02f1175c
JS		 3555 card = info->card;
3556 channel = (info->line) - (cy_card[card].first_line);
3557 if (!IS_CYC_Z(cy_card[card])) {
3558 chip = channel >> 2;
3559 channel &= 0x03;
3560 index = cy_card[card].bus_index;
3561 base_addr =
3562 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3563
3564 CY_LOCK(info, flags);
db05c3b1 3565 status = readb(base_addr + (CySRER << index)) &
02f1175c
JS		 3566 (CyTxRdy | CyTxMpty);
3567 CY_UNLOCK(info, flags);
3568 result = (status ? 0 : TIOCSER_TEMT);
3569 } else {
3570 /* Not supported yet */
3571 return -EINVAL;
3572 }
3573 return put_user(result, (unsigned long __user *)value);
1da177e4
LT		 3574}
3575
02f1175c 3576static int cy_tiocmget(struct tty_struct *tty, struct file *file)
1da177e4 3577{
02f1175c
JS		 3578 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3579 int card, chip, channel, index;
3580 void __iomem *base_addr;
3581 unsigned long flags;
3582 unsigned char status;
3583 unsigned long lstatus;
3584 unsigned int result;
3585 struct FIRM_ID __iomem *firm_id;
3586 struct ZFW_CTRL __iomem *zfw_ctrl;
3587 struct BOARD_CTRL __iomem *board_ctrl;
3588 struct CH_CTRL __iomem *ch_ctrl;
3589
3590 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3591 return -ENODEV;
1da177e4 3592
02f1175c
JS		 3593 card = info->card;
3594 channel = (info->line) - (cy_card[card].first_line);
3595 if (!IS_CYC_Z(cy_card[card])) {
3596 chip = channel >> 2;
3597 channel &= 0x03;
3598 index = cy_card[card].bus_index;
3599 base_addr =
3600 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
1da177e4 3601
02f1175c
JS		 3602 CY_LOCK(info, flags);
3603 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
db05c3b1
JS		 3604 status = readb(base_addr + (CyMSVR1 << index));
3605 status |= readb(base_addr + (CyMSVR2 << index));
02f1175c
JS		 3606 CY_UNLOCK(info, flags);
3607
3608 if (info->rtsdtr_inv) {
3609 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3610 ((status & CyDTR) ? TIOCM_RTS : 0);
3611 } else {
3612 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3613 ((status & CyDTR) ? TIOCM_DTR : 0);
3614 }
3615 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3616 ((status & CyRI) ? TIOCM_RNG : 0) |
3617 ((status & CyDSR) ? TIOCM_DSR : 0) |
3618 ((status & CyCTS) ? TIOCM_CTS : 0);
1da177e4 3619 } else {
02f1175c 3620 base_addr = cy_card[card].base_addr;
1da177e4 3621
02f1175c
JS		 3622 if (cy_card[card].num_chips != -1) {
3623 return -EINVAL;
3624 }
1da177e4 3625
02f1175c
JS		 3626 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3627 if (ISZLOADED(cy_card[card])) {
3628 zfw_ctrl = cy_card[card].base_addr +
db05c3b1 3629 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3630 board_ctrl = &zfw_ctrl->board_ctrl;
3631 ch_ctrl = zfw_ctrl->ch_ctrl;
db05c3b1 3632 lstatus = readl(&ch_ctrl[channel].rs_status);
02f1175c
JS		 3633 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3634 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3635 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3636 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3637 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3638 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3639 } else {
3640 result = 0;
3641 return -ENODEV;
3642 }
1da177e4 3643
02f1175c
JS		 3644 }
3645 return result;
3646} /* cy_tiomget */
1da177e4
LT		 3647
3648static int
3649cy_tiocmset(struct tty_struct *tty, struct file *file,
02f1175c 3650 unsigned int set, unsigned int clear)
1da177e4 3651{
02f1175c
JS		 3652 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3653 int card, chip, channel, index;
3654 void __iomem *base_addr;
3655 unsigned long flags;
3656 struct FIRM_ID __iomem *firm_id;
3657 struct ZFW_CTRL __iomem *zfw_ctrl;
3658 struct BOARD_CTRL __iomem *board_ctrl;
3659 struct CH_CTRL __iomem *ch_ctrl;
3660 int retval;
3661
3662 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3663 return -ENODEV;
3664
3665 card = info->card;
3666 channel = (info->line) - (cy_card[card].first_line);
3667 if (!IS_CYC_Z(cy_card[card])) {
3668 chip = channel >> 2;
3669 channel &= 0x03;
3670 index = cy_card[card].bus_index;
3671 base_addr =
3672 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3673
3674 if (set & TIOCM_RTS) {
3675 CY_LOCK(info, flags);
3676 cy_writeb(base_addr + (CyCAR << index),
3677 (u_char) channel);
3678 if (info->rtsdtr_inv) {
3679 cy_writeb(base_addr + (CyMSVR2 << index),
3680 CyDTR);
3681 } else {
3682 cy_writeb(base_addr + (CyMSVR1 << index),
3683 CyRTS);
3684 }
3685 CY_UNLOCK(info, flags);
3686 }
3687 if (clear & TIOCM_RTS) {
3688 CY_LOCK(info, flags);
3689 cy_writeb(base_addr + (CyCAR << index),
3690 (u_char) channel);
3691 if (info->rtsdtr_inv) {
3692 cy_writeb(base_addr + (CyMSVR2 << index),
3693 ~CyDTR);
3694 } else {
3695 cy_writeb(base_addr + (CyMSVR1 << index),
3696 ~CyRTS);
3697 }
3698 CY_UNLOCK(info, flags);
3699 }
3700 if (set & TIOCM_DTR) {
3701 CY_LOCK(info, flags);
3702 cy_writeb(base_addr + (CyCAR << index),
3703 (u_char) channel);
3704 if (info->rtsdtr_inv) {
3705 cy_writeb(base_addr + (CyMSVR1 << index),
3706 CyRTS);
3707 } else {
3708 cy_writeb(base_addr + (CyMSVR2 << index),
3709 CyDTR);
3710 }
1da177e4 3711#ifdef CY_DEBUG_DTR
02f1175c
JS		 3712 printk("cyc:set_modem_info raising DTR\n");
3713 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 3714 readb(base_addr + (CyMSVR1 << index)),
3715 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3716#endif
02f1175c
JS		 3717 CY_UNLOCK(info, flags);
3718 }
3719 if (clear & TIOCM_DTR) {
3720 CY_LOCK(info, flags);
3721 cy_writeb(base_addr + (CyCAR << index),
3722 (u_char) channel);
3723 if (info->rtsdtr_inv) {
3724 cy_writeb(base_addr + (CyMSVR1 << index),
3725 ~CyRTS);
3726 } else {
3727 cy_writeb(base_addr + (CyMSVR2 << index),
3728 ~CyDTR);
3729 }
1da177e4
LT		 3730
3731#ifdef CY_DEBUG_DTR
02f1175c
JS		 3732 printk("cyc:set_modem_info dropping DTR\n");
3733 printk(" status: 0x%x, 0x%x\n",
db05c3b1
JS		 3734 readb(base_addr + (CyMSVR1 << index)),
3735 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3736#endif
02f1175c
JS		 3737 CY_UNLOCK(info, flags);
3738 }
3739 } else {
3740 base_addr = cy_card[card].base_addr;
3741
3742 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3743 if (ISZLOADED(cy_card[card])) {
3744 zfw_ctrl = cy_card[card].base_addr +
db05c3b1 3745 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3746 board_ctrl = &zfw_ctrl->board_ctrl;
3747 ch_ctrl = zfw_ctrl->ch_ctrl;
3748
3749 if (set & TIOCM_RTS) {
3750 CY_LOCK(info, flags);
3751 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3752 readl(&ch_ctrl[channel].rs_control) |
3753 C_RS_RTS);
02f1175c
JS		 3754 CY_UNLOCK(info, flags);
3755 }
3756 if (clear & TIOCM_RTS) {
3757 CY_LOCK(info, flags);
3758 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3759 readl(&ch_ctrl[channel].rs_control) &
3760 ~C_RS_RTS);
02f1175c
JS		 3761 CY_UNLOCK(info, flags);
3762 }
3763 if (set & TIOCM_DTR) {
3764 CY_LOCK(info, flags);
3765 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3766 readl(&ch_ctrl[channel].rs_control) |
3767 C_RS_DTR);
1da177e4 3768#ifdef CY_DEBUG_DTR
02f1175c 3769 printk("cyc:set_modem_info raising Z DTR\n");
1da177e4 3770#endif
02f1175c
JS		 3771 CY_UNLOCK(info, flags);
3772 }
3773 if (clear & TIOCM_DTR) {
3774 CY_LOCK(info, flags);
3775 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3776 readl(&ch_ctrl[channel].rs_control) &
3777 ~C_RS_DTR);
1da177e4 3778#ifdef CY_DEBUG_DTR
02f1175c 3779 printk("cyc:set_modem_info clearing Z DTR\n");
1da177e4 3780#endif
02f1175c
JS		 3781 CY_UNLOCK(info, flags);
3782 }
3783 } else {
3784 return -ENODEV;
3785 }
3786 CY_LOCK(info, flags);
3787 retval = cyz_issue_cmd(&cy_card[info->card],
3788 channel, C_CM_IOCTLM, 0L);
3789 if (retval != 0) {
3790 printk("cyc:set_modem_info retval on ttyC%d was %x\n",
3791 info->line, retval);
3792 }
3793 CY_UNLOCK(info, flags);
1da177e4 3794 }
02f1175c
JS		 3795 return 0;
3796} /* cy_tiocmset */
1da177e4
LT		 3797
3798/*
3799 * cy_break() --- routine which turns the break handling on or off
3800 */
02f1175c 3801static void cy_break(struct tty_struct *tty, int break_state)
1da177e4 3802{
02f1175c
JS		 3803 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3804 unsigned long flags;
1da177e4 3805
02f1175c
JS		 3806 if (serial_paranoia_check(info, tty->name, "cy_break"))
3807 return;
1da177e4 3808
02f1175c
JS		 3809 CY_LOCK(info, flags);
3810 if (!IS_CYC_Z(cy_card[info->card])) {
3811 /* Let the transmit ISR take care of this (since it
3812 requires stuffing characters into the output stream).
3813 */
3814 if (break_state == -1) {
3815 if (!info->breakon) {
3816 info->breakon = 1;
3817 if (!info->xmit_cnt) {
3818 CY_UNLOCK(info, flags);
3819 start_xmit(info);
3820 CY_LOCK(info, flags);
3821 }
3822 }
3823 } else {
3824 if (!info->breakoff) {
3825 info->breakoff = 1;
3826 if (!info->xmit_cnt) {
3827 CY_UNLOCK(info, flags);
3828 start_xmit(info);
3829 CY_LOCK(info, flags);
3830 }
3831 }
1da177e4 3832 }
1da177e4 3833 } else {
02f1175c
JS		 3834 int retval;
3835
3836 if (break_state == -1) {
3837 retval = cyz_issue_cmd(&cy_card[info->card],
3838 info->line - cy_card[info->card].first_line,
3839 C_CM_SET_BREAK, 0L);
3840 if (retval != 0) {
3841 printk("cyc:cy_break (set) retval on ttyC%d "
3842 "was %x\n", info->line, retval);
3843 }
3844 } else {
3845 retval = cyz_issue_cmd(&cy_card[info->card],
3846 info->line - cy_card[info->card].first_line,
3847 C_CM_CLR_BREAK, 0L);
3848 if (retval != 0) {
3849 printk("cyc:cy_break (clr) retval on ttyC%d "
3850 "was %x\n", info->line, retval);
3851 }
1da177e4 3852 }
1da177e4 3853 }
02f1175c
JS		 3854 CY_UNLOCK(info, flags);
3855} /* cy_break */
1da177e4
LT		 3856
3857static int
02f1175c 3858get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
1da177e4
LT		 3859{
3860
02f1175c
JS		 3861 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3862 return -EFAULT;
3863 info->mon.int_count = 0;
3864 info->mon.char_count = 0;
3865 info->mon.char_max = 0;
3866 info->mon.char_last = 0;
3867 return 0;
3868} /* get_mon_info */
1da177e4 3869
02f1175c 3870static int set_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 3871{
02f1175c
JS		 3872 void __iomem *base_addr;
3873 int card, channel, chip, index;
3874 unsigned long flags;
1da177e4 3875
02f1175c
JS		 3876 card = info->card;
3877 channel = info->line - cy_card[card].first_line;
3878 if (!IS_CYC_Z(cy_card[card])) {
3879 chip = channel >> 2;
3880 channel &= 0x03;
3881 index = cy_card[card].bus_index;
3882 base_addr =
3883 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3884
3885 info->cor3 &= ~CyREC_FIFO;
3886 info->cor3 |= value & CyREC_FIFO;
1da177e4 3887
02f1175c
JS		 3888 CY_LOCK(info, flags);
3889 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3890 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3891 CY_UNLOCK(info, flags);
3892 } else {
096dcfce 3893 /* Nothing to do! */
02f1175c
JS		 3894 }
3895 return 0;
3896} /* set_threshold */
1da177e4
LT		 3897
3898static int
02f1175c 3899get_threshold(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3900{
02f1175c
JS		 3901 void __iomem *base_addr;
3902 int card, channel, chip, index;
3903 unsigned long tmp;
1da177e4 3904
02f1175c
JS		 3905 card = info->card;
3906 channel = info->line - cy_card[card].first_line;
3907 if (!IS_CYC_Z(cy_card[card])) {
3908 chip = channel >> 2;
3909 channel &= 0x03;
3910 index = cy_card[card].bus_index;
3911 base_addr =
3912 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3913
db05c3b1 3914 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
02f1175c
JS		 3915 return put_user(tmp, value);
3916 } else {
096dcfce 3917 /* Nothing to do! */
02f1175c
JS		 3918 return 0;
3919 }
3920} /* get_threshold */
1da177e4
LT		 3921
3922static int
02f1175c 3923set_default_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 3924{
02f1175c
JS		 3925 info->default_threshold = value & 0x0f;
3926 return 0;
3927} /* set_default_threshold */
1da177e4
LT		 3928
3929static int
02f1175c 3930get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3931{
02f1175c
JS		 3932 return put_user(info->default_threshold, value);
3933} /* get_default_threshold */
1da177e4 3934
02f1175c 3935static int set_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3936{
02f1175c
JS		 3937 void __iomem *base_addr;
3938 int card, channel, chip, index;
3939 unsigned long flags;
1da177e4 3940
02f1175c
JS		 3941 card = info->card;
3942 channel = info->line - cy_card[card].first_line;
3943 if (!IS_CYC_Z(cy_card[card])) {
3944 chip = channel >> 2;
3945 channel &= 0x03;
3946 index = cy_card[card].bus_index;
3947 base_addr =
3948 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
1da177e4 3949
02f1175c
JS		 3950 CY_LOCK(info, flags);
3951 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3952 CY_UNLOCK(info, flags);
3953 } else {
096dcfce 3954 /* Nothing to do! */
02f1175c
JS		 3955 }
3956 return 0;
3957} /* set_timeout */
1da177e4 3958
02f1175c 3959static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3960{
02f1175c
JS		 3961 void __iomem *base_addr;
3962 int card, channel, chip, index;
3963 unsigned long tmp;
1da177e4 3964
02f1175c
JS		 3965 card = info->card;
3966 channel = info->line - cy_card[card].first_line;
3967 if (!IS_CYC_Z(cy_card[card])) {
3968 chip = channel >> 2;
3969 channel &= 0x03;
3970 index = cy_card[card].bus_index;
3971 base_addr =
3972 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3973
db05c3b1 3974 tmp = readb(base_addr + (CyRTPR << index));
02f1175c
JS		 3975 return put_user(tmp, value);
3976 } else {
096dcfce 3977 /* Nothing to do! */
02f1175c
JS		 3978 return 0;
3979 }
3980} /* get_timeout */
1da177e4 3981
02f1175c 3982static int set_default_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3983{
02f1175c
JS		 3984 info->default_timeout = value & 0xff;
3985 return 0;
3986} /* set_default_timeout */
1da177e4
LT		 3987
3988static int
02f1175c 3989get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3990{
02f1175c
JS		 3991 return put_user(info->default_timeout, value);
3992} /* get_default_timeout */
1da177e4
LT		 3993
3994/*
3995 * This routine allows the tty driver to implement device-
3996 * specific ioctl's. If the ioctl number passed in cmd is
3997 * not recognized by the driver, it should return ENOIOCTLCMD.
3998 */
3999static int
02f1175c
JS		 4000cy_ioctl(struct tty_struct *tty, struct file *file,
4001 unsigned int cmd, unsigned long arg)
1da177e4 4002{
02f1175c
JS		 4003 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4004 struct cyclades_icount cprev, cnow; /* kernel counter temps */
4005 struct serial_icounter_struct __user *p_cuser; /* user space */
4006 int ret_val = 0;
4007 unsigned long flags;
4008 void __user *argp = (void __user *)arg;
4009
4010 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
4011 return -ENODEV;
1da177e4
LT		 4012
4013#ifdef CY_DEBUG_OTHER
02f1175c 4014 printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", info->line, cmd, arg); /* */
1da177e4
LT		 4015#endif
4016
02f1175c
JS		 4017 switch (cmd) {
4018 case CYGETMON:
4019 ret_val = get_mon_info(info, argp);
4020 break;
4021 case CYGETTHRESH:
4022 ret_val = get_threshold(info, argp);
4023 break;
4024 case CYSETTHRESH:
4025 ret_val = set_threshold(info, arg);
4026 break;
4027 case CYGETDEFTHRESH:
4028 ret_val = get_default_threshold(info, argp);
4029 break;
4030 case CYSETDEFTHRESH:
4031 ret_val = set_default_threshold(info, arg);
4032 break;
4033 case CYGETTIMEOUT:
4034 ret_val = get_timeout(info, argp);
4035 break;
4036 case CYSETTIMEOUT:
4037 ret_val = set_timeout(info, arg);
4038 break;
4039 case CYGETDEFTIMEOUT:
4040 ret_val = get_default_timeout(info, argp);
4041 break;
4042 case CYSETDEFTIMEOUT:
4043 ret_val = set_default_timeout(info, arg);
4044 break;
1da177e4 4045 case CYSETRFLOW:
02f1175c
JS		 4046 info->rflow = (int)arg;
4047 ret_val = 0;
4048 break;
1da177e4 4049 case CYGETRFLOW:
02f1175c
JS		 4050 ret_val = info->rflow;
4051 break;
1da177e4 4052 case CYSETRTSDTR_INV:
02f1175c
JS		 4053 info->rtsdtr_inv = (int)arg;
4054 ret_val = 0;
4055 break;
1da177e4 4056 case CYGETRTSDTR_INV:
02f1175c
JS		 4057 ret_val = info->rtsdtr_inv;
4058 break;
1da177e4 4059 case CYGETCARDINFO:
02f1175c
JS		 4060 if (copy_to_user(argp, &cy_card[info->card],
4061 sizeof(struct cyclades_card))) {
4062 ret_val = -EFAULT;
4063 break;
4064 }
4065 ret_val = 0;
1da177e4 4066 break;
1da177e4 4067 case CYGETCD1400VER:
02f1175c
JS		 4068 ret_val = info->chip_rev;
4069 break;
1da177e4
LT		 4070#ifndef CONFIG_CYZ_INTR
4071 case CYZSETPOLLCYCLE:
02f1175c
JS		 4072 cyz_polling_cycle = (arg * HZ) / 1000;
4073 ret_val = 0;
4074 break;
1da177e4 4075 case CYZGETPOLLCYCLE:
02f1175c
JS		 4076 ret_val = (cyz_polling_cycle * 1000) / HZ;
4077 break;
4078#endif /* CONFIG_CYZ_INTR */
1da177e4 4079 case CYSETWAIT:
02f1175c
JS		 4080 info->closing_wait = (unsigned short)arg *HZ / 100;
4081 ret_val = 0;
4082 break;
1da177e4 4083 case CYGETWAIT:
02f1175c
JS		 4084 ret_val = info->closing_wait / (HZ / 100);
4085 break;
4086 case TIOCGSERIAL:
4087 ret_val = get_serial_info(info, argp);
4088 break;
4089 case TIOCSSERIAL:
4090 ret_val = set_serial_info(info, argp);
4091 break;
4092 case TIOCSERGETLSR: /* Get line status register */
4093 ret_val = get_lsr_info(info, argp);
4094 break;
4095 /*
4096 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4097 * - mask passed in arg for lines of interest
4098 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4099 * Caller should use TIOCGICOUNT to see which one it was
4100 */
1da177e4 4101 case TIOCMIWAIT:
1da177e4 4102 CY_LOCK(info, flags);
02f1175c
JS		 4103 /* note the counters on entry */
4104 cprev = info->icount;
1da177e4 4105 CY_UNLOCK(info, flags);
02f1175c
JS		 4106 while (1) {
4107 interruptible_sleep_on(&info->delta_msr_wait);
4108 /* see if a signal did it */
4109 if (signal_pending(current)) {
4110 return -ERESTARTSYS;
4111 }
1da177e4 4112
02f1175c
JS		 4113 CY_LOCK(info, flags);
4114 cnow = info->icount; /* atomic copy */
4115 CY_UNLOCK(info, flags);
4116
4117 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
4118 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
4119 return -EIO; /* no change => error */
4120 }
4121 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4122 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4123 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4124 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
4125 return 0;
4126 }
4127 cprev = cnow;
1da177e4 4128 }
02f1175c 4129 /* NOTREACHED */
1da177e4 4130
02f1175c
JS		 4131 /*
4132 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4133 * Return: write counters to the user passed counter struct
4134 * NB: both 1->0 and 0->1 transitions are counted except for
4135 * RI where only 0->1 is counted.
4136 */
1da177e4 4137 case TIOCGICOUNT:
02f1175c
JS		 4138 CY_LOCK(info, flags);
4139 cnow = info->icount;
4140 CY_UNLOCK(info, flags);
4141 p_cuser = argp;
4142 ret_val = put_user(cnow.cts, &p_cuser->cts);
4143 if (ret_val)
4144 return ret_val;
4145 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4146 if (ret_val)
4147 return ret_val;
4148 ret_val = put_user(cnow.rng, &p_cuser->rng);
4149 if (ret_val)
4150 return ret_val;
4151 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4152 if (ret_val)
4153 return ret_val;
4154 ret_val = put_user(cnow.rx, &p_cuser->rx);
4155 if (ret_val)
4156 return ret_val;
4157 ret_val = put_user(cnow.tx, &p_cuser->tx);
4158 if (ret_val)
4159 return ret_val;
4160 ret_val = put_user(cnow.frame, &p_cuser->frame);
4161 if (ret_val)
4162 return ret_val;
4163 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4164 if (ret_val)
4165 return ret_val;
4166 ret_val = put_user(cnow.parity, &p_cuser->parity);
4167 if (ret_val)
4168 return ret_val;
4169 ret_val = put_user(cnow.brk, &p_cuser->brk);
4170 if (ret_val)
4171 return ret_val;
4172 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4173 if (ret_val)
4174 return ret_val;
4175 ret_val = 0;
4176 break;
4177 default:
4178 ret_val = -ENOIOCTLCMD;
4179 }
1da177e4
LT		 4180
4181#ifdef CY_DEBUG_OTHER
02f1175c 4182 printk(" cyc:cy_ioctl done\n");
1da177e4
LT		 4183#endif
4184
02f1175c
JS		 4185 return ret_val;
4186} /* cy_ioctl */
1da177e4
LT		 4187
4188/*
4189 * This routine allows the tty driver to be notified when
4190 * device's termios settings have changed. Note that a
4191 * well-designed tty driver should be prepared to accept the case
4192 * where old == NULL, and try to do something rational.
4193 */
02f1175c 4194static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 4195{
02f1175c 4196 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1da177e4
LT		 4197
4198#ifdef CY_DEBUG_OTHER
02f1175c 4199 printk("cyc:cy_set_termios ttyC%d\n", info->line);
1da177e4
LT		 4200#endif
4201
02f1175c
JS		 4202 if (tty->termios->c_cflag == old_termios->c_cflag &&
4203 (tty->termios->c_iflag & (IXON | IXANY)) ==
4204 (old_termios->c_iflag & (IXON | IXANY)))
4205 return;
4206 set_line_char(info);
4207
4208 if ((old_termios->c_cflag & CRTSCTS) &&
4209 !(tty->termios->c_cflag & CRTSCTS)) {
4210 tty->hw_stopped = 0;
4211 cy_start(tty);
4212 }
1da177e4 4213#if 0
02f1175c
JS		 4214 /*
4215 * No need to wake up processes in open wait, since they
4216 * sample the CLOCAL flag once, and don't recheck it.
4217 * XXX It's not clear whether the current behavior is correct
4218 * or not. Hence, this may change.....
4219 */
4220 if (!(old_termios->c_cflag & CLOCAL) &&
4221 (tty->termios->c_cflag & CLOCAL))
4222 wake_up_interruptible(&info->open_wait);
1da177e4 4223#endif
02f1175c 4224} /* cy_set_termios */
1da177e4
LT		 4225
4226/* This function is used to send a high-priority XON/XOFF character to
4227 the device.
4228*/
02f1175c 4229static void cy_send_xchar(struct tty_struct *tty, char ch)
1da177e4 4230{
02f1175c 4231 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1da177e4
LT		 4232 int card, channel;
4233
02f1175c 4234 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
1da177e4
LT		 4235 return;
4236
02f1175c 4237 info->x_char = ch;
1da177e4
LT		 4238
4239 if (ch)
02f1175c 4240 cy_start(tty);
1da177e4
LT		 4241
4242 card = info->card;
4243 channel = info->line - cy_card[card].first_line;
4244
02f1175c
JS		 4245 if (IS_CYC_Z(cy_card[card])) {
4246 if (ch == STOP_CHAR(tty))
4247 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXOFF,
4248 0L);
4249 else if (ch == START_CHAR(tty))
4250 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXON,
4251 0L);
1da177e4
LT		 4252 }
4253}
4254
4255/* This routine is called by the upper-layer tty layer to signal
4256 that incoming characters should be throttled because the input
4257 buffers are close to full.
4258 */
02f1175c 4259static void cy_throttle(struct tty_struct *tty)
1da177e4 4260{
02f1175c
JS		 4261 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4262 unsigned long flags;
4263 void __iomem *base_addr;
4264 int card, chip, channel, index;
1da177e4
LT		 4265
4266#ifdef CY_DEBUG_THROTTLE
02f1175c 4267 char buf[64];
1da177e4 4268
02f1175c
JS		 4269 printk("cyc:throttle %s: %d....ttyC%d\n", tty_name(tty, buf),
4270 tty->ldisc.chars_in_buffer(tty), info->line);
1da177e4
LT		 4271#endif
4272
02f1175c
JS		 4273 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4274 return;
4275 }
4276
4277 card = info->card;
4278
4279 if (I_IXOFF(tty)) {
4280 if (!IS_CYC_Z(cy_card[card]))
4281 cy_send_xchar(tty, STOP_CHAR(tty));
4282 else
4283 info->throttle = 1;
4284 }
1da177e4 4285
02f1175c
JS		 4286 if (tty->termios->c_cflag & CRTSCTS) {
4287 channel = info->line - cy_card[card].first_line;
4288 if (!IS_CYC_Z(cy_card[card])) {
4289 chip = channel >> 2;
4290 channel &= 0x03;
4291 index = cy_card[card].bus_index;
4292 base_addr = cy_card[card].base_addr +
4293 (cy_chip_offset[chip] << index);
4294
4295 CY_LOCK(info, flags);
4296 cy_writeb(base_addr + (CyCAR << index),
4297 (u_char) channel);
4298 if (info->rtsdtr_inv) {
4299 cy_writeb(base_addr + (CyMSVR2 << index),
4300 ~CyDTR);
4301 } else {
4302 cy_writeb(base_addr + (CyMSVR1 << index),
4303 ~CyRTS);
4304 }
4305 CY_UNLOCK(info, flags);
4306 } else {
4307 info->throttle = 1;
4308 }
4309 }
02f1175c 4310} /* cy_throttle */
1da177e4
LT		 4311
4312/*
4313 * This routine notifies the tty driver that it should signal
4314 * that characters can now be sent to the tty without fear of
4315 * overrunning the input buffers of the line disciplines.
4316 */
02f1175c 4317static void cy_unthrottle(struct tty_struct *tty)
1da177e4 4318{
02f1175c
JS		 4319 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4320 unsigned long flags;
4321 void __iomem *base_addr;
4322 int card, chip, channel, index;
1da177e4
LT		 4323
4324#ifdef CY_DEBUG_THROTTLE
02f1175c
JS		 4325 char buf[64];
4326
4327 printk("cyc:unthrottle %s: %d....ttyC%d\n", tty_name(tty, buf),
4328 tty->ldisc.chars_in_buffer(tty), info->line);
1da177e4
LT		 4329#endif
4330
02f1175c
JS		 4331 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4332 return;
4333 }
1da177e4 4334
02f1175c
JS		 4335 if (I_IXOFF(tty)) {
4336 if (info->x_char)
4337 info->x_char = 0;
4338 else
4339 cy_send_xchar(tty, START_CHAR(tty));
1da177e4 4340 }
1da177e4 4341
02f1175c
JS		 4342 if (tty->termios->c_cflag & CRTSCTS) {
4343 card = info->card;
4344 channel = info->line - cy_card[card].first_line;
4345 if (!IS_CYC_Z(cy_card[card])) {
4346 chip = channel >> 2;
4347 channel &= 0x03;
4348 index = cy_card[card].bus_index;
4349 base_addr = cy_card[card].base_addr +
4350 (cy_chip_offset[chip] << index);
4351
4352 CY_LOCK(info, flags);
4353 cy_writeb(base_addr + (CyCAR << index),
4354 (u_char) channel);
4355 if (info->rtsdtr_inv) {
4356 cy_writeb(base_addr + (CyMSVR2 << index),
4357 CyDTR);
4358 } else {
4359 cy_writeb(base_addr + (CyMSVR1 << index),
4360 CyRTS);
4361 }
4362 CY_UNLOCK(info, flags);
4363 } else {
4364 info->throttle = 0;
4365 }
4366 }
02f1175c 4367} /* cy_unthrottle */
1da177e4
LT		 4368
4369/* cy_start and cy_stop provide software output flow control as a
4370 function of XON/XOFF, software CTS, and other such stuff.
4371*/
02f1175c 4372static void cy_stop(struct tty_struct *tty)
1da177e4 4373{
02f1175c
JS		 4374 struct cyclades_card *cinfo;
4375 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4376 void __iomem *base_addr;
4377 int chip, channel, index;
4378 unsigned long flags;
1da177e4
LT		 4379
4380#ifdef CY_DEBUG_OTHER
02f1175c 4381 printk("cyc:cy_stop ttyC%d\n", info->line); /* */
1da177e4
LT		 4382#endif
4383
02f1175c
JS		 4384 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4385 return;
1da177e4 4386
02f1175c
JS		 4387 cinfo = &cy_card[info->card];
4388 channel = info->line - cinfo->first_line;
4389 if (!IS_CYC_Z(*cinfo)) {
4390 index = cinfo->bus_index;
4391 chip = channel >> 2;
4392 channel &= 0x03;
4393 base_addr = cy_card[info->card].base_addr +
4394 (cy_chip_offset[chip] << index);
1da177e4 4395
02f1175c
JS		 4396 CY_LOCK(info, flags);
4397 cy_writeb(base_addr + (CyCAR << index),
4398 (u_char)(channel & 0x0003)); /* index channel */
4399 cy_writeb(base_addr + (CySRER << index),
db05c3b1 4400 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
02f1175c
JS		 4401 CY_UNLOCK(info, flags);
4402 } else {
096dcfce 4403 /* Nothing to do! */
02f1175c 4404 }
02f1175c 4405} /* cy_stop */
1da177e4 4406
02f1175c 4407static void cy_start(struct tty_struct *tty)
1da177e4 4408{
02f1175c
JS		 4409 struct cyclades_card *cinfo;
4410 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4411 void __iomem *base_addr;
4412 int chip, channel, index;
4413 unsigned long flags;
1da177e4
LT		 4414
4415#ifdef CY_DEBUG_OTHER
02f1175c 4416 printk("cyc:cy_start ttyC%d\n", info->line); /* */
1da177e4
LT		 4417#endif
4418
02f1175c
JS		 4419 if (serial_paranoia_check(info, tty->name, "cy_start"))
4420 return;
1da177e4 4421
02f1175c
JS		 4422 cinfo = &cy_card[info->card];
4423 channel = info->line - cinfo->first_line;
4424 index = cinfo->bus_index;
4425 if (!IS_CYC_Z(*cinfo)) {
4426 chip = channel >> 2;
4427 channel &= 0x03;
4428 base_addr = cy_card[info->card].base_addr +
4429 (cy_chip_offset[chip] << index);
1da177e4 4430
02f1175c
JS		 4431 CY_LOCK(info, flags);
4432 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4433 cy_writeb(base_addr + (CySRER << index),
db05c3b1 4434 readb(base_addr + (CySRER << index)) | CyTxRdy);
02f1175c
JS		 4435 CY_UNLOCK(info, flags);
4436 } else {
096dcfce 4437 /* Nothing to do! */
02f1175c 4438 }
02f1175c 4439} /* cy_start */
1da177e4 4440
02f1175c 4441static void cy_flush_buffer(struct tty_struct *tty)
1da177e4 4442{
02f1175c
JS		 4443 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4444 int card, channel, retval;
4445 unsigned long flags;
4446
1da177e4 4447#ifdef CY_DEBUG_IO
02f1175c 4448 printk("cyc:cy_flush_buffer ttyC%d\n", info->line); /* */
1da177e4
LT		 4449#endif
4450
02f1175c
JS		 4451 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4452 return;
1da177e4 4453
02f1175c
JS		 4454 card = info->card;
4455 channel = (info->line) - (cy_card[card].first_line);
1da177e4 4456
1da177e4 4457 CY_LOCK(info, flags);
02f1175c 4458 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1da177e4 4459 CY_UNLOCK(info, flags);
1da177e4 4460
02f1175c
JS		 4461 if (IS_CYC_Z(cy_card[card])) { /* If it is a Z card, flush the on-board
4462 buffers as well */
4463 CY_LOCK(info, flags);
4464 retval =
4465 cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
4466 if (retval != 0) {
4467 printk("cyc: flush_buffer retval on ttyC%d was %x\n",
4468 info->line, retval);
4469 }
4470 CY_UNLOCK(info, flags);
4471 }
4472 tty_wakeup(tty);
02f1175c 4473} /* cy_flush_buffer */
1da177e4
LT		 4474
4475/*
4476 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4477 */
02f1175c 4478static void cy_hangup(struct tty_struct *tty)
1da177e4 4479{
02f1175c
JS		 4480 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4481
1da177e4 4482#ifdef CY_DEBUG_OTHER
02f1175c 4483 printk("cyc:cy_hangup ttyC%d\n", info->line); /* */
1da177e4
LT		 4484#endif
4485
02f1175c
JS		 4486 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4487 return;
1da177e4 4488
02f1175c
JS		 4489 cy_flush_buffer(tty);
4490 shutdown(info);
4491 info->event = 0;
4492 info->count = 0;
1da177e4 4493#ifdef CY_DEBUG_COUNT
02f1175c 4494 printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
1da177e4 4495#endif
02f1175c
JS		 4496 info->tty = NULL;
4497 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4498 wake_up_interruptible(&info->open_wait);
4499} /* cy_hangup */
1da177e4
LT		 4500
4501/*
4502 * ---------------------------------------------------------------------
4503 * cy_init() and friends
4504 *
4505 * cy_init() is called at boot-time to initialize the serial driver.
4506 * ---------------------------------------------------------------------
4507 */
4508
4509/* initialize chips on Cyclom-Y card -- return number of valid
4510 chips (which is number of ports/4) */
4511static unsigned short __init
02f1175c 4512cyy_init_card(void __iomem * true_base_addr, int index)
1da177e4 4513{
02f1175c
JS		 4514 unsigned int chip_number;
4515 void __iomem *base_addr;
4516
4517 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4518 /* Cy_HwReset is 0x1400 */
4519 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4520 /* Cy_ClrIntr is 0x1800 */
4521 udelay(500L);
4522
4523 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4524 base_addr =
4525 true_base_addr + (cy_chip_offset[chip_number] << index);
4526 mdelay(1);
db05c3b1 4527 if (readb(base_addr + (CyCCR << index)) != 0x00) {
02f1175c
JS		 4528 /*************
4529 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4530 chip_number, (unsigned long)base_addr);
4531 *************/
4532 return chip_number;
4533 }
4534
4535 cy_writeb(base_addr + (CyGFRCR << index), 0);
4536 udelay(10L);
4537
4538 /* The Cyclom-16Y does not decode address bit 9 and therefore
4539 cannot distinguish between references to chip 0 and a non-
4540 existent chip 4. If the preceding clearing of the supposed
4541 chip 4 GFRCR register appears at chip 0, there is no chip 4
4542 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4543 */
db05c3b1 4544 if (chip_number == 4 && readb(true_base_addr +
02f1175c
JS		 4545 (cy_chip_offset[0] << index) +
4546 (CyGFRCR << index)) == 0) {
4547 return chip_number;
4548 }
4549
4550 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4551 mdelay(1);
4552
db05c3b1 4553 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
02f1175c
JS		 4554 /*
4555 printk(" chip #%d at %#6lx is not responding ",
4556 chip_number, (unsigned long)base_addr);
4557 printk("(GFRCR stayed 0)\n",
4558 */
4559 return chip_number;
4560 }
db05c3b1 4561 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
02f1175c
JS		 4562 0x40) {
4563 /*
4564 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4565 "%#2x)\n",
4566 chip_number, (unsigned long)base_addr,
4567 base_addr[CyGFRCR<<index]);
4568 */
4569 return chip_number;
4570 }
4571 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
db05c3b1 4572 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
02f1175c
JS		 4573 /* It is a CD1400 rev. J or later */
4574 /* Impossible to reach 5ms with this chip.
4575 Changed to 2ms instead (f = 500 Hz). */
4576 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4577 } else {
4578 /* f = 200 Hz */
4579 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4580 }
1da177e4 4581
02f1175c
JS		 4582 /*
4583 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4584 chip_number, (unsigned long)base_addr,
db05c3b1 4585 readb(base_addr+(CyGFRCR<<index)));
02f1175c
JS		 4586 */
4587 }
4588 return chip_number;
4589} /* cyy_init_card */
1da177e4
LT		 4590
4591/*
4592 * ---------------------------------------------------------------------
4593 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4594 * sets global variables and return the number of ISA boards found.
4595 * ---------------------------------------------------------------------
4596 */
02f1175c 4597static int __init cy_detect_isa(void)
1da177e4
LT		 4598{
4599#ifdef CONFIG_ISA
02f1175c
JS		 4600 unsigned short cy_isa_irq, nboard;
4601 void __iomem *cy_isa_address;
4602 unsigned short i, j, cy_isa_nchan;
1da177e4 4603#ifdef MODULE
02f1175c 4604 int isparam = 0;
1da177e4
LT		 4605#endif
4606
02f1175c 4607 nboard = 0;
1da177e4
LT		 4608
4609#ifdef MODULE
4610 /* Check for module parameters */
02f1175c
JS		 4611 for (i = 0; i < NR_CARDS; i++) {
4612 if (maddr[i] || i) {
4613 isparam = 1;
4614 cy_isa_addresses[i] = maddr[i];
4615 }
4616 if (!maddr[i])
4617 break;
1da177e4
LT		 4618 }
4619#endif
4620
02f1175c
JS		 4621 /* scan the address table probing for Cyclom-Y/ISA boards */
4622 for (i = 0; i < NR_ISA_ADDRS; i++) {
4623 unsigned int isa_address = cy_isa_addresses[i];
4624 if (isa_address == 0x0000) {
096dcfce 4625 return nboard;
02f1175c 4626 }
1da177e4 4627
02f1175c 4628 /* probe for CD1400... */
1da177e4 4629 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
02f1175c
JS		 4630 cy_isa_nchan = CyPORTS_PER_CHIP *
4631 cyy_init_card(cy_isa_address, 0);
4632 if (cy_isa_nchan == 0) {
4633 continue;
4634 }
1da177e4
LT		 4635#ifdef MODULE
4636 if (isparam && irq[i])
02f1175c 4637 cy_isa_irq = irq[i];
1da177e4
LT		 4638 else
4639#endif
02f1175c
JS		 4640 /* find out the board's irq by probing */
4641 cy_isa_irq = detect_isa_irq(cy_isa_address);
4642 if (cy_isa_irq == 0) {
4643 printk("Cyclom-Y/ISA found at 0x%lx ",
4644 (unsigned long)cy_isa_address);
4645 printk("but the IRQ could not be detected.\n");
4646 continue;
4647 }
4648
4649 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4650 printk("Cyclom-Y/ISA found at 0x%lx ",
4651 (unsigned long)cy_isa_address);
4652 printk("but no more channels are available.\n");
4653 printk("Change NR_PORTS in cyclades.c and recompile "
4654 "kernel.\n");
096dcfce 4655 return nboard;
02f1175c
JS		 4656 }
4657 /* fill the next cy_card structure available */
4658 for (j = 0; j < NR_CARDS; j++) {
4659 if (cy_card[j].base_addr == 0)
4660 break;
4661 }
4662 if (j == NR_CARDS) { /* no more cy_cards available */
4663 printk("Cyclom-Y/ISA found at 0x%lx ",
4664 (unsigned long)cy_isa_address);
4665 printk("but no more cards can be used .\n");
4666 printk("Change NR_CARDS in cyclades.c and recompile "
4667 "kernel.\n");
096dcfce 4668 return nboard;
02f1175c
JS		 4669 }
4670
4671 /* allocate IRQ */
4672 if (request_irq(cy_isa_irq, cyy_interrupt,
4673 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4674 printk("Cyclom-Y/ISA found at 0x%lx ",
4675 (unsigned long)cy_isa_address);
4676 printk("but could not allocate IRQ#%d.\n", cy_isa_irq);
096dcfce 4677 return nboard;
02f1175c
JS		 4678 }
4679
4680 /* set cy_card */
4681 cy_card[j].base_addr = cy_isa_address;
4682 cy_card[j].ctl_addr = NULL;
4683 cy_card[j].irq = (int)cy_isa_irq;
4684 cy_card[j].bus_index = 0;
4685 cy_card[j].first_line = cy_next_channel;
4686 cy_card[j].num_chips = cy_isa_nchan / 4;
4687 nboard++;
4688
4689 /* print message */
4690 printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
4691 j + 1, (unsigned long)cy_isa_address,
4692 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4693 cy_isa_irq);
4694 printk("%d channels starting from port %d.\n",
4695 cy_isa_nchan, cy_next_channel);
4696 cy_next_channel += cy_isa_nchan;
4697 }
096dcfce 4698 return nboard;
1da177e4 4699#else
096dcfce 4700 return 0;
02f1175c
JS		 4701#endif /* CONFIG_ISA */
4702} /* cy_detect_isa */
1da177e4 4703
1a86b5e3 4704static void plx_init(void __iomem * addr, __u32 initctl)
1da177e4 4705{
02f1175c 4706 /* Reset PLX */
db05c3b1 4707 cy_writel(addr + initctl, readl(addr + initctl) | 0x40000000);
02f1175c 4708 udelay(100L);
db05c3b1 4709 cy_writel(addr + initctl, readl(addr + initctl) & ~0x40000000);
02f1175c
JS		 4710
4711 /* Reload Config. Registers from EEPROM */
db05c3b1 4712 cy_writel(addr + initctl, readl(addr + initctl) | 0x20000000);
02f1175c 4713 udelay(100L);
db05c3b1 4714 cy_writel(addr + initctl, readl(addr + initctl) & ~0x20000000);
1da177e4
LT		 4715}
4716
4717/*
4718 * ---------------------------------------------------------------------
4719 * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
4720 * sets global variables and return the number of PCI boards found.
4721 * ---------------------------------------------------------------------
4722 */
02f1175c 4723static int __init cy_detect_pci(void)
1da177e4
LT		 4724{
4725#ifdef CONFIG_PCI
4726
02f1175c
JS		 4727 struct pci_dev *pdev = NULL;
4728 unsigned char cyy_rev_id;
4729 unsigned char cy_pci_irq = 0;
1a86b5e3 4730 __u32 cy_pci_phys0, cy_pci_phys2;
02f1175c
JS		 4731 void __iomem *cy_pci_addr0, *cy_pci_addr2;
4732 unsigned short i, j, cy_pci_nchan, plx_ver;
4733 unsigned short device_id, dev_index = 0;
1a86b5e3
KK		 4734 __u32 mailbox;
4735 __u32 ZeIndex = 0;
02f1175c 4736 void __iomem *Ze_addr0[NR_CARDS], *Ze_addr2[NR_CARDS];
1a86b5e3 4737 __u32 Ze_phys0[NR_CARDS], Ze_phys2[NR_CARDS];
02f1175c
JS		 4738 unsigned char Ze_irq[NR_CARDS];
4739 struct pci_dev *Ze_pdev[NR_CARDS];
4740
4741 for (i = 0; i < NR_CARDS; i++) {
4742 /* look for a Cyclades card by vendor and device id */
893de2df 4743 while ((device_id = cy_pci_dev_id[dev_index].device) != 0) {
02f1175c
JS		 4744 if ((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
4745 device_id, pdev)) == NULL) {
4746 dev_index++; /* try next device id */
4747 } else {
4748 break; /* found a board */
4749 }
4750 }
1da177e4
LT		 4751
4752 if (device_id == 0)
02f1175c 4753 break;
1da177e4
LT		 4754
4755 if (pci_enable_device(pdev))
02f1175c 4756 continue;
1da177e4 4757
02f1175c 4758 /* read PCI configuration area */
1da177e4
LT		 4759 cy_pci_irq = pdev->irq;
4760 cy_pci_phys0 = pci_resource_start(pdev, 0);
4761 cy_pci_phys2 = pci_resource_start(pdev, 2);
4762 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4763
4764 device_id &= ~PCI_DEVICE_ID_MASK;
4765
02f1175c
JS		 4766 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4767 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
1da177e4 4768#ifdef CY_PCI_DEBUG
02f1175c
JS		 4769 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4770 pdev->bus->number, pdev->devfn);
4771 printk("rev_id=%d) IRQ%d\n",
4772 cyy_rev_id, (int)cy_pci_irq);
4773 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
4774 "ctladdr=0x%lx\n",
4775 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
1da177e4
LT		 4776#endif
4777
02f1175c
JS		 4778 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4779 printk(" Warning: PCI I/O bit incorrectly "
4780 "set. Ignoring it...\n");
4781 pdev->resource[2].flags &= ~IORESOURCE_IO;
4782 }
1da177e4 4783
02f1175c
JS		 4784 /* Although we don't use this I/O region, we should
4785 request it from the kernel anyway, to avoid problems
4786 with other drivers accessing it. */
4787 if (pci_request_regions(pdev, "Cyclom-Y") != 0) {
4788 printk(KERN_ERR "cyclades: failed to reserve "
4789 "PCI resources\n");
4790 continue;
4791 }
1da177e4 4792#if defined(__alpha__)
02f1175c
JS		 4793 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4794 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4795 pdev->bus->number, pdev->devfn);
4796 printk("rev_id=%d) IRQ%d\n",
4797 cyy_rev_id, (int)cy_pci_irq);
4798 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
4799 "ctladdr=0x%lx\n",
4800 (ulong)cy_pci_phys2,
4801 (ulong)cy_pci_phys0);
4802 printk("Cyclom-Y/PCI not supported for low "
4803 "addresses in Alpha systems.\n");
4804 i--;
4805 continue;
4806 }
1da177e4 4807#endif
02f1175c
JS		 4808 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Yctl);
4809 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ywin);
1da177e4
LT		 4810
4811#ifdef CY_PCI_DEBUG
02f1175c
JS		 4812 printk("Cyclom-Y/PCI: relocate winaddr=0x%lx "
4813 "ctladdr=0x%lx\n",
4814 (u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
1da177e4 4815#endif
02f1175c
JS		 4816 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4817 cyy_init_card(cy_pci_addr2, 1));
4818 if (cy_pci_nchan == 0) {
4819 printk("Cyclom-Y PCI host card with ");
4820 printk("no Serial-Modules at 0x%lx.\n",
4821 (ulong) cy_pci_phys2);
4822 i--;
4823 continue;
4824 }
4825 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4826 printk("Cyclom-Y/PCI found at 0x%lx ",
4827 (ulong) cy_pci_phys2);
4828 printk("but no channels are available.\n");
4829 printk("Change NR_PORTS in cyclades.c and "
4830 "recompile kernel.\n");
096dcfce 4831 return i;
02f1175c
JS		 4832 }
4833 /* fill the next cy_card structure available */
4834 for (j = 0; j < NR_CARDS; j++) {
4835 if (cy_card[j].base_addr == 0)
4836 break;
4837 }
4838 if (j == NR_CARDS) { /* no more cy_cards available */
4839 printk("Cyclom-Y/PCI found at 0x%lx ",
4840 (ulong) cy_pci_phys2);
4841 printk("but no more cards can be used.\n");
4842 printk("Change NR_CARDS in cyclades.c and "
4843 "recompile kernel.\n");
096dcfce 4844 return i;
02f1175c 4845 }
1da177e4 4846
02f1175c
JS		 4847 /* allocate IRQ */
4848 if (request_irq(cy_pci_irq, cyy_interrupt,
4849 IRQF_SHARED, "Cyclom-Y", &cy_card[j])) {
4850 printk("Cyclom-Y/PCI found at 0x%lx ",
4851 (ulong) cy_pci_phys2);
4852 printk("but could not allocate IRQ%d.\n",
4853 cy_pci_irq);
096dcfce 4854 return i;
02f1175c
JS		 4855 }
4856
4857 /* set cy_card */
4858 cy_card[j].base_phys = (ulong) cy_pci_phys2;
4859 cy_card[j].ctl_phys = (ulong) cy_pci_phys0;
4860 cy_card[j].base_addr = cy_pci_addr2;
4861 cy_card[j].ctl_addr = cy_pci_addr0;
4862 cy_card[j].irq = (int)cy_pci_irq;
4863 cy_card[j].bus_index = 1;
4864 cy_card[j].first_line = cy_next_channel;
4865 cy_card[j].num_chips = cy_pci_nchan / 4;
4866 cy_card[j].pdev = pdev;
4867
4868 /* enable interrupts in the PCI interface */
db05c3b1 4869 plx_ver = readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
02f1175c
JS		 4870 switch (plx_ver) {
4871 case PLX_9050:
4872
4873 cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
4874 break;
4875
4876 case PLX_9060:
4877 case PLX_9080:
4878 default: /* Old boards, use PLX_9060 */
4879
4880 plx_init(cy_pci_addr0, 0x6c);
4881 /* For some yet unknown reason, once the PLX9060 reloads
4882 the EEPROM, the IRQ is lost and, thus, we have to
4883 re-write it to the PCI config. registers.
4884 This will remain here until we find a permanent
4885 fix. */
4886 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4887 cy_pci_irq);
4888
4889 cy_writew(cy_pci_addr0 + 0x68,
db05c3b1 4890 readw(cy_pci_addr0 + 0x68) | 0x0900);
02f1175c
JS		 4891 break;
4892 }
4893
4894 /* print message */
4895 printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4896 j + 1, (ulong)cy_pci_phys2,
4897 (ulong) (cy_pci_phys2 + CyPCI_Ywin - 1),
4898 (int)cy_pci_irq);
4899 printk("%d channels starting from port %d.\n",
4900 cy_pci_nchan, cy_next_channel);
4901
4902 cy_next_channel += cy_pci_nchan;
4903 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4904 /* print message */
4905 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4906 pdev->bus->number, pdev->devfn);
4907 printk("rev_id=%d) IRQ%d\n",
4908 cyy_rev_id, (int)cy_pci_irq);
4909 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
4910 "ctladdr=0x%lx\n",
4911 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4912 printk("Cyclades-Z/PCI not supported for low "
4913 "addresses\n");
4914 break;
4915 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
1da177e4 4916#ifdef CY_PCI_DEBUG
02f1175c
JS		 4917 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4918 pdev->bus->number, pdev->devfn);
4919 printk("rev_id=%d) IRQ%d\n",
4920 cyy_rev_id, (int)cy_pci_irq);
4921 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
4922 "ctladdr=0x%lx\n",
4923 (ulong) cy_pci_phys2, (ulong) cy_pci_phys0);
1da177e4 4924#endif
02f1175c
JS		 4925 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Zctl);
4926
4927 /* Disable interrupts on the PLX before resetting it */
4928 cy_writew(cy_pci_addr0 + 0x68,
db05c3b1 4929 readw(cy_pci_addr0 + 0x68) & ~0x0900);
02f1175c
JS		 4930
4931 plx_init(cy_pci_addr0, 0x6c);
4932 /* For some yet unknown reason, once the PLX9060 reloads
4933 the EEPROM, the IRQ is lost and, thus, we have to
4934 re-write it to the PCI config. registers.
4935 This will remain here until we find a permanent
4936 fix. */
4937 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4938 cy_pci_irq);
4939
db05c3b1
JS		 4940 mailbox = (__u32)readl(&((struct RUNTIME_9060 __iomem *)
4941 cy_pci_addr0)->mail_box_0);
02f1175c
JS		 4942
4943 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4944 printk(" Warning: PCI I/O bit incorrectly "
4945 "set. Ignoring it...\n");
4946 pdev->resource[2].flags &= ~IORESOURCE_IO;
4947 }
1da177e4 4948
02f1175c
JS		 4949 /* Although we don't use this I/O region, we should
4950 request it from the kernel anyway, to avoid problems
4951 with other drivers accessing it. */
4952 if (pci_request_regions(pdev, "Cyclades-Z") != 0) {
4953 printk(KERN_ERR "cyclades: failed to reserve "
4954 "PCI resources\n");
4955 continue;
4956 }
4957
4958 if (mailbox == ZE_V1) {
4959 cy_pci_addr2 = ioremap(cy_pci_phys2,
4960 CyPCI_Ze_win);
4961 if (ZeIndex == NR_CARDS) {
4962 printk("Cyclades-Ze/PCI found at "
4963 "0x%lx but no more cards can "
4964 "be used.\nChange NR_CARDS in "
4965 "cyclades.c and recompile "
4966 "kernel.\n",
4967 (ulong)cy_pci_phys2);
4968 } else {
4969 Ze_phys0[ZeIndex] = cy_pci_phys0;
4970 Ze_phys2[ZeIndex] = cy_pci_phys2;
4971 Ze_addr0[ZeIndex] = cy_pci_addr0;
4972 Ze_addr2[ZeIndex] = cy_pci_addr2;
4973 Ze_irq[ZeIndex] = cy_pci_irq;
4974 Ze_pdev[ZeIndex] = pdev;
4975 ZeIndex++;
4976 }
4977 i--;
4978 continue;
4979 } else {
4980 cy_pci_addr2 = ioremap(cy_pci_phys2,CyPCI_Zwin);
4981 }
1da177e4
LT		 4982
4983#ifdef CY_PCI_DEBUG
02f1175c
JS		 4984 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx "
4985 "ctladdr=0x%lx\n",
4986 (ulong) cy_pci_addr2, (ulong) cy_pci_addr0);
4987 if (mailbox == ZO_V1) {
4988 cy_writel(&((struct RUNTIME_9060 *)
4989 (cy_pci_addr0))->loc_addr_base,
4990 WIN_CREG);
02f1175c
JS		 4991 printk("Cyclades-8Zo/PCI: FPGA id %lx, ver "
4992 "%lx\n", (ulong) (0xff &
db05c3b1 4993 readl(&((struct CUSTOM_REG *)
02f1175c
JS		 4994 (cy_pci_addr2))->fpga_id)),
4995 (ulong)(0xff &
db05c3b1 4996 readl(&((struct CUSTOM_REG *)
02f1175c
JS		 4997 (cy_pci_addr2))->
4998 fpga_version)));
4999 cy_writel(&((struct RUNTIME_9060 *)
5000 (cy_pci_addr0))->loc_addr_base,
5001 WIN_RAM);
5002 } else {
5003 printk("Cyclades-Z/PCI: New Cyclades-Z board. "
5004 "FPGA not loaded\n");
5005 }
1da177e4 5006#endif
02f1175c
JS		 5007 /* The following clears the firmware id word. This
5008 ensures that the driver will not attempt to talk to
5009 the board until it has been properly initialized.
5010 */
02f1175c
JS		 5011 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5012 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
5013
5014 /* This must be a Cyclades-8Zo/PCI. The extendable
5015 version will have a different device_id and will
5016 be allocated its maximum number of ports. */
5017 cy_pci_nchan = 8;
5018
5019 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5020 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5021 "no channels are available.\nChange "
5022 "NR_PORTS in cyclades.c and recompile "
5023 "kernel.\n", (ulong)cy_pci_phys2);
096dcfce 5024 return i;
02f1175c 5025 }
1da177e4 5026
02f1175c
JS		 5027 /* fill the next cy_card structure available */
5028 for (j = 0; j < NR_CARDS; j++) {
5029 if (cy_card[j].base_addr == 0)
5030 break;
5031 }
5032 if (j == NR_CARDS) { /* no more cy_cards available */
5033 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5034 "no more cards can be used.\nChange "
5035 "NR_CARDS in cyclades.c and recompile "
5036 "kernel.\n", (ulong)cy_pci_phys2);
096dcfce 5037 return i;
02f1175c
JS		 5038 }
5039#ifdef CONFIG_CYZ_INTR
5040 /* allocate IRQ only if board has an IRQ */
5041 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5042 if (request_irq(cy_pci_irq, cyz_interrupt,
5043 IRQF_SHARED, "Cyclades-Z",
5044 &cy_card[j])) {
5045 printk("Cyclom-8Zo/PCI found at 0x%lx "
5046 "but could not allocate "
5047 "IRQ%d.\n", (ulong)cy_pci_phys2,
5048 cy_pci_irq);
096dcfce 5049 return i;
02f1175c
JS		 5050 }
5051 }
5052#endif /* CONFIG_CYZ_INTR */
5053
5054 /* set cy_card */
5055 cy_card[j].base_phys = cy_pci_phys2;
5056 cy_card[j].ctl_phys = cy_pci_phys0;
5057 cy_card[j].base_addr = cy_pci_addr2;
5058 cy_card[j].ctl_addr = cy_pci_addr0;
5059 cy_card[j].irq = (int)cy_pci_irq;
5060 cy_card[j].bus_index = 1;
5061 cy_card[j].first_line = cy_next_channel;
5062 cy_card[j].num_chips = -1;
5063 cy_card[j].pdev = pdev;
5064
5065 /* print message */
1da177e4 5066#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 5067 /* don't report IRQ if board is no IRQ */
5068 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5069 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, "
5070 "IRQ%d, ", j + 1, (ulong)cy_pci_phys2,
5071 (ulong) (cy_pci_phys2 + CyPCI_Zwin - 1),
5072 (int)cy_pci_irq);
5073 else
5074#endif /* CONFIG_CYZ_INTR */
5075 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
5076 j + 1, (ulong)cy_pci_phys2,
5077 (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));
5078
5079 printk("%d channels starting from port %d.\n",
5080 cy_pci_nchan, cy_next_channel);
5081 cy_next_channel += cy_pci_nchan;
1da177e4 5082 }
02f1175c 5083 }
1da177e4 5084
02f1175c
JS		 5085 for (; ZeIndex != 0 && i < NR_CARDS; i++) {
5086 cy_pci_phys0 = Ze_phys0[0];
5087 cy_pci_phys2 = Ze_phys2[0];
5088 cy_pci_addr0 = Ze_addr0[0];
5089 cy_pci_addr2 = Ze_addr2[0];
5090 cy_pci_irq = Ze_irq[0];
5091 pdev = Ze_pdev[0];
5092 for (j = 0; j < ZeIndex - 1; j++) {
5093 Ze_phys0[j] = Ze_phys0[j + 1];
5094 Ze_phys2[j] = Ze_phys2[j + 1];
5095 Ze_addr0[j] = Ze_addr0[j + 1];
5096 Ze_addr2[j] = Ze_addr2[j + 1];
5097 Ze_irq[j] = Ze_irq[j + 1];
5098 Ze_pdev[j] = Ze_pdev[j + 1];
5099 }
5100 ZeIndex--;
db05c3b1 5101 mailbox = (__u32)readl(&((struct RUNTIME_9060 __iomem *)
02f1175c 5102 cy_pci_addr0)->mail_box_0);
1da177e4 5103#ifdef CY_PCI_DEBUG
02f1175c
JS		 5104 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
5105 (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
5106 printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not "
5107 "loaded\n");
1da177e4 5108#endif
02f1175c
JS		 5109 /* This must be the new Cyclades-Ze/PCI. */
5110 cy_pci_nchan = ZE_V1_NPORTS;
5111
5112 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5113 printk("Cyclades-Ze/PCI found at 0x%lx but no channels "
5114 "are available.\nChange NR_PORTS in cyclades.c "
5115 "and recompile kernel.\n",
5116 (ulong) cy_pci_phys2);
096dcfce 5117 return i;
02f1175c 5118 }
1da177e4 5119
02f1175c
JS		 5120 /* fill the next cy_card structure available */
5121 for (j = 0; j < NR_CARDS; j++) {
5122 if (cy_card[j].base_addr == 0)
5123 break;
5124 }
5125 if (j == NR_CARDS) { /* no more cy_cards available */
5126 printk("Cyclades-Ze/PCI found at 0x%lx but no more "
5127 "cards can be used.\nChange NR_CARDS in "
5128 "cyclades.c and recompile kernel.\n",
5129 (ulong) cy_pci_phys2);
096dcfce 5130 return i;
02f1175c 5131 }
1da177e4 5132#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 5133 /* allocate IRQ only if board has an IRQ */
5134 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5135 if (request_irq(cy_pci_irq, cyz_interrupt,
5136 IRQF_SHARED, "Cyclades-Z",
5137 &cy_card[j])) {
5138 printk("Cyclom-Ze/PCI found at 0x%lx ",
5139 (ulong) cy_pci_phys2);
5140 printk("but could not allocate IRQ%d.\n",
5141 cy_pci_irq);
096dcfce 5142 return i;
02f1175c 5143 }
1da177e4 5144 }
02f1175c
JS		 5145#endif /* CONFIG_CYZ_INTR */
5146
5147 /* set cy_card */
5148 cy_card[j].base_phys = cy_pci_phys2;
5149 cy_card[j].ctl_phys = cy_pci_phys0;
5150 cy_card[j].base_addr = cy_pci_addr2;
5151 cy_card[j].ctl_addr = cy_pci_addr0;
5152 cy_card[j].irq = (int)cy_pci_irq;
5153 cy_card[j].bus_index = 1;
5154 cy_card[j].first_line = cy_next_channel;
5155 cy_card[j].num_chips = -1;
1da177e4
LT		 5156 cy_card[j].pdev = pdev;
5157
02f1175c 5158 /* print message */
1da177e4
LT		 5159#ifdef CONFIG_CYZ_INTR
5160 /* don't report IRQ if board is no IRQ */
02f1175c
JS		 5161 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5162 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
5163 j + 1, (ulong) cy_pci_phys2,
5164 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1),
5165 (int)cy_pci_irq);
1da177e4 5166 else
02f1175c
JS		 5167#endif /* CONFIG_CYZ_INTR */
5168 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
5169 j + 1, (ulong) cy_pci_phys2,
5170 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1));
5171
5172 printk("%d channels starting from port %d.\n",
5173 cy_pci_nchan, cy_next_channel);
5174 cy_next_channel += cy_pci_nchan;
5175 }
1da177e4 5176 if (ZeIndex != 0) {
02f1175c
JS		 5177 printk("Cyclades-Ze/PCI found at 0x%x but no more cards can be "
5178 "used.\nChange NR_CARDS in cyclades.c and recompile "
5179 "kernel.\n", (unsigned int)Ze_phys2[0]);
1da177e4 5180 }
096dcfce 5181 return i;
1da177e4 5182#else
096dcfce 5183 return 0;
02f1175c
JS		 5184#endif /* ifdef CONFIG_PCI */
5185} /* cy_detect_pci */
1da177e4
LT		 5186
5187/*
5188 * This routine prints out the appropriate serial driver version number
5189 * and identifies which options were configured into this driver.
5190 */
02f1175c 5191static inline void show_version(void)
1da177e4 5192{
096dcfce 5193 printk("Cyclades driver " CY_VERSION "\n");
02f1175c
JS		 5194 printk(" built %s %s\n", __DATE__, __TIME__);
5195} /* show_version */
5196
5197static int
1da177e4 5198cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
02f1175c 5199 int *eof, void *data)
1da177e4 5200{
02f1175c
JS		 5201 struct cyclades_port *info;
5202 int i;
5203 int len = 0;
5204 off_t begin = 0;
5205 off_t pos = 0;
5206 int size;
5207 __u32 cur_jifs = jiffies;
5208
5209 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5210 "IdleIn Overruns Ldisc\n");
5211
5212 pos += size;
1da177e4 5213 len += size;
1da177e4 5214
02f1175c
JS		 5215 /* Output one line for each known port */
5216 for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5217 info = &cy_port[i];
5218
5219 if (info->count)
5220 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5221 "%8lu %9lu %6ld\n", info->line,
096dcfce 5222 (cur_jifs - info->idle_stats.in_use) / HZ,
02f1175c 5223 info->idle_stats.xmit_bytes,
096dcfce 5224 (cur_jifs - info->idle_stats.xmit_idle) / HZ,
02f1175c 5225 info->idle_stats.recv_bytes,
096dcfce 5226 (cur_jifs - info->idle_stats.recv_idle) / HZ,
02f1175c
JS		 5227 info->idle_stats.overruns,
5228 (long)info->tty->ldisc.num);
5229 else
5230 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5231 "%8lu %9lu %6ld\n",
5232 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5233 len += size;
5234 pos = begin + len;
5235
5236 if (pos < offset) {
5237 len = 0;
5238 begin = pos;
5239 }
5240 if (pos > offset + length)
5241 goto done;
1da177e4 5242 }
02f1175c 5243 *eof = 1;
1da177e4 5244done:
02f1175c
JS		 5245 *start = buf + (offset - begin); /* Start of wanted data */
5246 len -= (offset - begin); /* Start slop */
5247 if (len > length)
5248 len = length; /* Ending slop */
5249 if (len < 0)
5250 len = 0;
5251 return len;
1da177e4
LT		 5252}
5253
5254/* The serial driver boot-time initialization code!
5255 Hardware I/O ports are mapped to character special devices on a
5256 first found, first allocated manner. That is, this code searches
5257 for Cyclom cards in the system. As each is found, it is probed
5258 to discover how many chips (and thus how many ports) are present.
5259 These ports are mapped to the tty ports 32 and upward in monotonic
5260 fashion. If an 8-port card is replaced with a 16-port card, the
5261 port mapping on a following card will shift.
5262
5263 This approach is different from what is used in the other serial
5264 device driver because the Cyclom is more properly a multiplexer,
5265 not just an aggregation of serial ports on one card.
5266
5267 If there are more cards with more ports than have been
5268 statically allocated above, a warning is printed and the
5269 extra ports are ignored.
5270 */
5271
b68e31d0 5272static const struct tty_operations cy_ops = {
02f1175c
JS		 5273 .open = cy_open,
5274 .close = cy_close,
5275 .write = cy_write,
5276 .put_char = cy_put_char,
5277 .flush_chars = cy_flush_chars,
5278 .write_room = cy_write_room,
5279 .chars_in_buffer = cy_chars_in_buffer,
5280 .flush_buffer = cy_flush_buffer,
5281 .ioctl = cy_ioctl,
5282 .throttle = cy_throttle,
5283 .unthrottle = cy_unthrottle,
5284 .set_termios = cy_set_termios,
5285 .stop = cy_stop,
5286 .start = cy_start,
5287 .hangup = cy_hangup,
5288 .break_ctl = cy_break,
5289 .wait_until_sent = cy_wait_until_sent,
5290 .read_proc = cyclades_get_proc_info,
5291 .tiocmget = cy_tiocmget,
5292 .tiocmset = cy_tiocmset,
1da177e4
LT		 5293};
5294
02f1175c 5295static int __init cy_init(void)
1da177e4 5296{
02f1175c
JS		 5297 struct cyclades_port *info;
5298 struct cyclades_card *cinfo;
5299 int number_z_boards = 0;
5300 int board, port, i, index;
5301 unsigned long mailbox;
5302 unsigned short chip_number;
5303 int nports;
5304
5305 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5306 if (!cy_serial_driver)
5307 return -ENOMEM;
5308 show_version();
5309
5310 /* Initialize the tty_driver structure */
5311
5312 cy_serial_driver->owner = THIS_MODULE;
5313 cy_serial_driver->driver_name = "cyclades";
5314 cy_serial_driver->name = "ttyC";
5315 cy_serial_driver->major = CYCLADES_MAJOR;
5316 cy_serial_driver->minor_start = 0;
5317 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5318 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5319 cy_serial_driver->init_termios = tty_std_termios;
5320 cy_serial_driver->init_termios.c_cflag =
5321 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5322 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
5323 tty_set_operations(cy_serial_driver, &cy_ops);
5324
5325 if (tty_register_driver(cy_serial_driver))
5326 panic("Couldn't register Cyclades serial driver\n");
5327
5328 for (i = 0; i < NR_CARDS; i++) {
5329 /* base_addr=0 indicates board not found */
5330 cy_card[i].base_addr = NULL;
5331 }
5332
5333 /* the code below is responsible to find the boards. Each different
5334 type of board has its own detection routine. If a board is found,
5335 the next cy_card structure available is set by the detection
5336 routine. These functions are responsible for checking the
5337 availability of cy_card and cy_port data structures and updating
5338 the cy_next_channel. */
5339
5340 /* look for isa boards */
5341 cy_isa_nboard = cy_detect_isa();
5342
5343 /* look for pci boards */
5344 cy_pci_nboard = cy_detect_pci();
5345
5346 cy_nboard = cy_isa_nboard + cy_pci_nboard;
5347
5348 /* invalidate remaining cy_card structures */
5349 for (i = 0; i < NR_CARDS; i++) {
5350 if (cy_card[i].base_addr == 0) {
5351 cy_card[i].first_line = -1;
5352 cy_card[i].ctl_addr = NULL;
5353 cy_card[i].irq = 0;
5354 cy_card[i].bus_index = 0;
5355 cy_card[i].first_line = 0;
5356 cy_card[i].num_chips = 0;
5357 }
5358 }
5359 /* invalidate remaining cy_port structures */
5360 for (i = cy_next_channel; i < NR_PORTS; i++) {
5361 cy_port[i].line = -1;
5362 cy_port[i].magic = -1;
5363 }
5364
5365 /* initialize per-port data structures for each valid board found */
5366 for (board = 0; board < cy_nboard; board++) {
5367 cinfo = &cy_card[board];
5368 if (cinfo->num_chips == -1) { /* Cyclades-Z */
5369 number_z_boards++;
db05c3b1 5370 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
02f1175c
JS		 5371 cy_card[board].ctl_addr)->
5372 mail_box_0);
5373 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
5374 cinfo->intr_enabled = 0;
5375 cinfo->nports = 0; /* Will be correctly set later, after
5376 Z FW is loaded */
5377 spin_lock_init(&cinfo->card_lock);
5378 for (port = cinfo->first_line;
5379 port < cinfo->first_line + nports; port++) {
5380 info = &cy_port[port];
5381 info->magic = CYCLADES_MAGIC;
5382 info->type = PORT_STARTECH;
5383 info->card = board;
5384 info->line = port;
5385 info->chip_rev = 0;
5386 info->flags = STD_COM_FLAGS;
5387 info->tty = NULL;
5388 if (mailbox == ZO_V1)
5389 info->xmit_fifo_size = CYZ_FIFO_SIZE;
5390 else
5391 info->xmit_fifo_size =
5392 4 * CYZ_FIFO_SIZE;
5393 info->cor1 = 0;
5394 info->cor2 = 0;
5395 info->cor3 = 0;
5396 info->cor4 = 0;
5397 info->cor5 = 0;
5398 info->tbpr = 0;
5399 info->tco = 0;
5400 info->rbpr = 0;
5401 info->rco = 0;
5402 info->custom_divisor = 0;
5403 info->close_delay = 5 * HZ / 10;
5404 info->closing_wait = CLOSING_WAIT_DELAY;
5405 info->icount.cts = info->icount.dsr =
5406 info->icount.rng = info->icount.dcd = 0;
5407 info->icount.rx = info->icount.tx = 0;
5408 info->icount.frame = info->icount.parity = 0;
5409 info->icount.overrun = info->icount.brk = 0;
5410 info->x_char = 0;
5411 info->event = 0;
5412 info->count = 0;
5413 info->blocked_open = 0;
5414 info->default_threshold = 0;
5415 info->default_timeout = 0;
5416 INIT_WORK(&info->tqueue, do_softint);
5417 init_waitqueue_head(&info->open_wait);
5418 init_waitqueue_head(&info->close_wait);
5419 init_waitqueue_head(&info->shutdown_wait);
5420 init_waitqueue_head(&info->delta_msr_wait);
5421 /* info->session */
5422 /* info->pgrp */
5423 info->read_status_mask = 0;
5424 /* info->timeout */
5425 /* Bentson's vars */
5426 info->jiffies[0] = 0;
5427 info->jiffies[1] = 0;
5428 info->jiffies[2] = 0;
5429 info->rflush_count = 0;
1da177e4 5430#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 5431 init_timer(&cyz_rx_full_timer[port]);
5432 cyz_rx_full_timer[port].function = NULL;
1da177e4 5433#endif
02f1175c
JS		 5434 }
5435 continue;
5436 } else { /* Cyclom-Y of some kind */
5437 index = cinfo->bus_index;
5438 spin_lock_init(&cinfo->card_lock);
5439 cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
5440 for (port = cinfo->first_line;
5441 port < cinfo->first_line + cinfo->nports; port++) {
5442 info = &cy_port[port];
5443 info->magic = CYCLADES_MAGIC;
5444 info->type = PORT_CIRRUS;
5445 info->card = board;
5446 info->line = port;
5447 info->flags = STD_COM_FLAGS;
5448 info->tty = NULL;
5449 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
5450 info->cor1 =
5451 CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
5452 info->cor2 = CyETC;
5453 info->cor3 = 0x08; /* _very_ small rcv threshold */
5454 info->cor4 = 0;
5455 info->cor5 = 0;
5456 info->custom_divisor = 0;
5457 info->close_delay = 5 * HZ / 10;
5458 info->closing_wait = CLOSING_WAIT_DELAY;
5459 info->icount.cts = info->icount.dsr =
5460 info->icount.rng = info->icount.dcd = 0;
5461 info->icount.rx = info->icount.tx = 0;
5462 info->icount.frame = info->icount.parity = 0;
5463 info->icount.overrun = info->icount.brk = 0;
5464 chip_number = (port - cinfo->first_line) / 4;
5465 if ((info->chip_rev =
db05c3b1 5466 readb(cinfo->base_addr +
02f1175c
JS		 5467 (cy_chip_offset[chip_number] <<
5468 index) + (CyGFRCR << index))) >=
5469 CD1400_REV_J) {
5470 /* It is a CD1400 rev. J or later */
5471 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
5472 info->tco = baud_co_60[13]; /* Tx CO */
5473 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
5474 info->rco = baud_co_60[13]; /* Rx CO */
5475 info->rflow = 0;
5476 info->rtsdtr_inv = 1;
5477 } else {
5478 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
5479 info->tco = baud_co_25[13]; /* Tx CO */
5480 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
5481 info->rco = baud_co_25[13]; /* Rx CO */
5482 info->rflow = 0;
5483 info->rtsdtr_inv = 0;
5484 }
5485 info->x_char = 0;
5486 info->event = 0;
5487 info->count = 0;
5488 info->blocked_open = 0;
5489 info->default_threshold = 0;
5490 info->default_timeout = 0;
5491 INIT_WORK(&info->tqueue, do_softint);
5492 init_waitqueue_head(&info->open_wait);
5493 init_waitqueue_head(&info->close_wait);
5494 init_waitqueue_head(&info->shutdown_wait);
5495 init_waitqueue_head(&info->delta_msr_wait);
5496 /* info->session */
5497 /* info->pgrp */
5498 info->read_status_mask =
5499 CyTIMEOUT | CySPECHAR | CyBREAK
5500 | CyPARITY | CyFRAME | CyOVERRUN;
5501 /* info->timeout */
5502 }
5503 }
5504 }
1da177e4
LT		 5505
5506#ifndef CONFIG_CYZ_INTR
02f1175c
JS		 5507 if (number_z_boards && !cyz_timeron) {
5508 cyz_timeron++;
5509 cyz_timerlist.expires = jiffies + 1;
5510 add_timer(&cyz_timerlist);
1da177e4 5511#ifdef CY_PCI_DEBUG
02f1175c 5512 printk("Cyclades-Z polling initialized\n");
1da177e4 5513#endif
02f1175c
JS		 5514 }
5515#endif /* CONFIG_CYZ_INTR */
5516
5517 return 0;
1da177e4 5518
02f1175c 5519} /* cy_init */
1da177e4 5520
02f1175c 5521static void __exit cy_cleanup_module(void)
1da177e4 5522{
02f1175c 5523 int i, e1;
1da177e4
LT		 5524
5525#ifndef CONFIG_CYZ_INTR
02f1175c
JS		 5526 if (cyz_timeron){
5527 cyz_timeron = 0;
5528 del_timer(&cyz_timerlist);
5529 }
1da177e4
LT		 5530#endif /* CONFIG_CYZ_INTR */
5531
02f1175c
JS		 5532 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5533 printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
5534 e1);
1da177e4 5535
02f1175c 5536 put_tty_driver(cy_serial_driver);
1da177e4 5537
02f1175c
JS		 5538 for (i = 0; i < NR_CARDS; i++) {
5539 if (cy_card[i].base_addr) {
5540 iounmap(cy_card[i].base_addr);
5541 if (cy_card[i].ctl_addr)
5542 iounmap(cy_card[i].ctl_addr);
5543 if (cy_card[i].irq
1da177e4 5544#ifndef CONFIG_CYZ_INTR
02f1175c 5545 && cy_card[i].num_chips != -1 /* not a Z card */
1da177e4 5546#endif /* CONFIG_CYZ_INTR */
02f1175c
JS		 5547 )
5548 free_irq(cy_card[i].irq, &cy_card[i]);
1da177e4 5549#ifdef CONFIG_PCI
02f1175c
JS		 5550 if (cy_card[i].pdev)
5551 pci_release_regions(cy_card[i].pdev);
1da177e4 5552#endif
02f1175c
JS		 5553 }
5554 }
1da177e4
LT		 5555} /* cy_cleanup_module */
5556
5557module_init(cy_init);
5558module_exit(cy_cleanup_module);
5559
5560MODULE_LICENSE("GPL");
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