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[mirror_ubuntu-bionic-kernel.git] / drivers / char / cyclades.c
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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
627#if 0
096dcfce 628#define PAUSE __asm__("nop")
1da177e4 629#else
096dcfce 630#define PAUSE do {} while (0)
1da177e4
LT		 631#endif
632
633/*
634 * Include section
635 */
1da177e4
LT		 636#include <linux/module.h>
637#include <linux/errno.h>
638#include <linux/signal.h>
639#include <linux/sched.h>
640#include <linux/timer.h>
641#include <linux/interrupt.h>
642#include <linux/tty.h>
33f0f88f 643#include <linux/tty_flip.h>
1da177e4
LT		 644#include <linux/serial.h>
645#include <linux/major.h>
646#include <linux/string.h>
647#include <linux/fcntl.h>
648#include <linux/ptrace.h>
649#include <linux/cyclades.h>
650#include <linux/mm.h>
651#include <linux/ioport.h>
652#include <linux/init.h>
653#include <linux/delay.h>
654#include <linux/spinlock.h>
655#include <linux/bitops.h>
656
657#include <asm/system.h>
658#include <asm/io.h>
659#include <asm/irq.h>
660#include <asm/uaccess.h>
661
662#define CY_LOCK(info,flags) \
663 do { \
664 spin_lock_irqsave(&cy_card[info->card].card_lock, flags); \
665 } while (0)
02f1175c 666
1da177e4
LT		 667#define CY_UNLOCK(info,flags) \
668 do { \
669 spin_unlock_irqrestore(&cy_card[info->card].card_lock, flags); \
670 } while (0)
671
1da177e4
LT		 672#include <linux/kernel.h>
673#include <linux/pci.h>
674
675#include <linux/stat.h>
676#include <linux/proc_fs.h>
677
02f1175c
JS		 678static void cy_throttle(struct tty_struct *tty);
679static void cy_send_xchar(struct tty_struct *tty, char ch);
1da177e4
LT		 680
681#define IS_CYC_Z(card) ((card).num_chips == -1)
682
683#define Z_FPGA_CHECK(card) \
02f1175c
JS		 684 ((cy_readl(&((struct RUNTIME_9060 __iomem *) \
685 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
1da177e4
LT		 686
687#define ISZLOADED(card) (((ZO_V1==cy_readl(&((struct RUNTIME_9060 __iomem *) \
688 ((card).ctl_addr))->mail_box_0)) || \
689 Z_FPGA_CHECK(card)) && \
690 (ZFIRM_ID==cy_readl(&((struct FIRM_ID __iomem *) \
691 ((card).base_addr+ID_ADDRESS))->signature)))
692
693#ifndef SERIAL_XMIT_SIZE
694#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
695#endif
696#define WAKEUP_CHARS 256
697
698#define STD_COM_FLAGS (0)
699
1da177e4
LT		 700static struct tty_driver *cy_serial_driver;
701
702#ifdef CONFIG_ISA
703/* This is the address lookup table. The driver will probe for
704 Cyclom-Y/ISA boards at all addresses in here. If you want the
705 driver to probe addresses at a different address, add it to
706 this table. If the driver is probing some other board and
707 causing problems, remove the offending address from this table.
708 The cy_setup function extracts additional addresses from the
709 boot options line. The form is "cyclades=address,address..."
710*/
711
712static unsigned int cy_isa_addresses[] = {
02f1175c
JS		 713 0xD0000,
714 0xD2000,
715 0xD4000,
716 0xD6000,
717 0xD8000,
718 0xDA000,
719 0xDC000,
720 0xDE000,
721 0, 0, 0, 0, 0, 0, 0, 0
1da177e4 722};
02f1175c 723
fe971071 724#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
1da177e4
LT		 725
726#ifdef MODULE
727static long maddr[NR_CARDS] = { 0, };
02f1175c 728static int irq[NR_CARDS] = { 0, };
1da177e4
LT		 729
730module_param_array(maddr, long, NULL, 0);
731module_param_array(irq, int, NULL, 0);
732#endif
733
02f1175c 734#endif /* CONFIG_ISA */
1da177e4
LT		 735
736/* This is the per-card data structure containing address, irq, number of
737 channels, etc. This driver supports a maximum of NR_CARDS cards.
738*/
739static struct cyclades_card cy_card[NR_CARDS];
740
741/* This is the per-channel data structure containing pointers, flags
742 and variables for the port. This driver supports a maximum of NR_PORTS.
743*/
744static struct cyclades_port cy_port[NR_PORTS];
745
02f1175c 746static int cy_next_channel; /* next minor available */
1da177e4 747
1da177e4
LT		 748/*
749 * This is used to look up the divisor speeds and the timeouts
750 * We're normally limited to 15 distinct baud rates. The extra
751 * are accessed via settings in info->flags.
752 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
753 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
754 * HI VHI
755 * 20
756 */
757static int baud_table[] = {
02f1175c
JS		 758 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
759 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
760 230400, 0
761};
762
763static char baud_co_25[] = { /* 25 MHz clock option table */
764 /* value => 00 01 02 03 04 */
765 /* divide by 8 32 128 512 2048 */
766 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
767 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
768};
769
770static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
771 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
772 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
773};
774
775static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
776 /* value => 00 01 02 03 04 */
777 /* divide by 8 32 128 512 2048 */
778 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
779 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
780 0x00
781};
782
783static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
784 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
785 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
786 0x21
787};
788
789static char baud_cor3[] = { /* receive threshold */
790 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
791 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
792 0x07
793};
1da177e4
LT		 794
795/*
796 * The Cyclades driver implements HW flow control as any serial driver.
797 * The cyclades_port structure member rflow and the vector rflow_thr
798 * allows us to take advantage of a special feature in the CD1400 to avoid
799 * data loss even when the system interrupt latency is too high. These flags
800 * are to be used only with very special applications. Setting these flags
801 * requires the use of a special cable (DTR and RTS reversed). In the new
802 * CD1400-based boards (rev. 6.00 or later), there is no need for special
803 * cables.
804 */
805
02f1175c
JS		 806static char rflow_thr[] = { /* rflow threshold */
807 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
808 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
809 0x0a
810};
1da177e4
LT		 811
812/* The Cyclom-Ye has placed the sequential chips in non-sequential
813 * address order. This look-up table overcomes that problem.
814 */
02f1175c
JS		 815static int cy_chip_offset[] = { 0x0000,
816 0x0400,
817 0x0800,
818 0x0C00,
819 0x0200,
820 0x0600,
821 0x0A00,
822 0x0E00
823};
1da177e4
LT		 824
825/* PCI related definitions */
826
02f1175c
JS		 827static unsigned short cy_pci_nboard;
828static unsigned short cy_isa_nboard;
829static unsigned short cy_nboard;
1da177e4 830#ifdef CONFIG_PCI
893de2df
JS		 831static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
832 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, /* PCI < 1Mb */
833 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, /* PCI > 1Mb */
834 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, /* 4Y PCI < 1Mb */
835 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, /* 4Y PCI > 1Mb */
836 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, /* 8Y PCI < 1Mb */
837 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, /* 8Y PCI > 1Mb */
838 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, /* Z PCI < 1Mb */
839 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, /* Z PCI > 1Mb */
840 { } /* end of table */
02f1175c 841};
893de2df 842MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
1da177e4
LT		 843#endif
844
845static void cy_start(struct tty_struct *);
846static void set_line_char(struct cyclades_port *);
1a86b5e3 847static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
1da177e4
LT		 848#ifdef CONFIG_ISA
849static unsigned detect_isa_irq(void __iomem *);
02f1175c 850#endif /* CONFIG_ISA */
1da177e4 851
02f1175c 852static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
1da177e4
LT		 853
854#ifndef CONFIG_CYZ_INTR
855static void cyz_poll(unsigned long);
856
857/* The Cyclades-Z polling cycle is defined by this variable */
858static long cyz_polling_cycle = CZ_DEF_POLL;
859
860static int cyz_timeron = 0;
8d06afab 861static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
1da177e4 862
02f1175c 863#else /* CONFIG_CYZ_INTR */
1da177e4
LT		 864static void cyz_rx_restart(unsigned long);
865static struct timer_list cyz_rx_full_timer[NR_PORTS];
02f1175c 866#endif /* CONFIG_CYZ_INTR */
1da177e4 867
02f1175c
JS		 868static inline int serial_paranoia_check(struct cyclades_port *info,
869 char *name, const char *routine)
1da177e4
LT		 870{
871#ifdef SERIAL_PARANOIA_CHECK
02f1175c 872 if (!info) {
096dcfce
JS		 873 printk("cyc Warning: null cyclades_port for (%s) in %s\n",
874 name, routine);
02f1175c
JS		 875 return 1;
876 }
877
878 if ((long)info < (long)(&cy_port[0]) ||
879 (long)(&cy_port[NR_PORTS]) < (long)info) {
096dcfce
JS		 880 printk("cyc Warning: cyclades_port out of range for (%s) in "
881 "%s\n", name, routine);
02f1175c
JS		 882 return 1;
883 }
884
885 if (info->magic != CYCLADES_MAGIC) {
096dcfce
JS		 886 printk("cyc Warning: bad magic number for serial struct (%s) "
887 "in %s\n", name, routine);
02f1175c
JS		 888 return 1;
889 }
1da177e4 890#endif
02f1175c
JS		 891 return 0;
892} /* serial_paranoia_check */
1da177e4
LT		 893
894/*
895 * This routine is used by the interrupt handler to schedule
896 * processing in the software interrupt portion of the driver
897 * (also known as the "bottom half"). This can be called any
898 * number of times for any channel without harm.
899 */
02f1175c 900static inline void cy_sched_event(struct cyclades_port *info, int event)
1da177e4 901{
02f1175c
JS		 902 info->event |= 1 << event; /* remember what kind of event and who */
903 schedule_work(&info->tqueue);
904} /* cy_sched_event */
1da177e4
LT		 905
906/*
907 * This routine is used to handle the "bottom half" processing for the
908 * serial driver, known also the "software interrupt" processing.
909 * This processing is done at the kernel interrupt level, after the
910 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
911 * is where time-consuming activities which can not be done in the
912 * interrupt driver proper are done; the interrupt driver schedules
913 * them using cy_sched_event(), and they get done here.
914 *
915 * This is done through one level of indirection--the task queue.
916 * When a hardware interrupt service routine wants service by the
917 * driver's bottom half, it enqueues the appropriate tq_struct (one
918 * per port) to the keventd work queue and sets a request flag
919 * that the work queue be processed.
920 *
921 * Although this may seem unwieldy, it gives the system a way to
922 * pass an argument (in this case the pointer to the cyclades_port
923 * structure) to the bottom half of the driver. Previous kernels
924 * had to poll every port to see if that port needed servicing.
925 */
926static void
c4028958 927do_softint(struct work_struct *work)
1da177e4 928{
c4028958
DH		 929 struct cyclades_port *info =
930 container_of(work, struct cyclades_port, tqueue);
02f1175c
JS		 931 struct tty_struct *tty;
932
933 tty = info->tty;
934 if (!tty)
935 return;
936
937 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
938 tty_hangup(info->tty);
939 wake_up_interruptible(&info->open_wait);
940 info->flags &= ~ASYNC_NORMAL_ACTIVE;
941 }
942 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
943 wake_up_interruptible(&info->open_wait);
1da177e4 944#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 945 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
946 if (cyz_rx_full_timer[info->line].function == NULL) {
947 cyz_rx_full_timer[info->line].expires = jiffies + 1;
948 cyz_rx_full_timer[info->line].function = cyz_rx_restart;
949 cyz_rx_full_timer[info->line].data =
950 (unsigned long)info;
951 add_timer(&cyz_rx_full_timer[info->line]);
952 }
1da177e4 953 }
1da177e4 954#endif
02f1175c
JS		 955 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
956 wake_up_interruptible(&info->delta_msr_wait);
957 tty_wakeup(tty);
1da177e4 958#ifdef Z_WAKE
02f1175c
JS		 959 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
960 wake_up_interruptible(&info->shutdown_wait);
1da177e4
LT		 961#endif
962} /* do_softint */
963
964
965/***********************************************************/
966/********* Start of block of Cyclom-Y specific code ********/
967
968/* This routine waits up to 1000 micro-seconds for the previous
969 command to the Cirrus chip to complete and then issues the
970 new command. An error is returned if the previous command
971 didn't finish within the time limit.
972
973 This function is only called from inside spinlock-protected code.
974 */
02f1175c 975static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
1da177e4 976{
02f1175c 977 volatile int i;
1da177e4 978
02f1175c
JS		 979 /* Check to see that the previous command has completed */
980 for (i = 0; i < 100; i++) {
981 if (cy_readb(base_addr + (CyCCR << index)) == 0) {
982 break;
983 }
984 udelay(10L);
1da177e4 985 }
02f1175c
JS		 986 /* if the CCR never cleared, the previous command
987 didn't finish within the "reasonable time" */
988 if (i == 100)
096dcfce 989 return -1;
1da177e4 990
02f1175c
JS		 991 /* Issue the new command */
992 cy_writeb(base_addr + (CyCCR << index), cmd);
1da177e4 993
096dcfce 994 return 0;
02f1175c 995} /* cyy_issue_cmd */
1da177e4
LT		 996
997#ifdef CONFIG_ISA
998/* ISA interrupt detection code */
02f1175c 999static unsigned detect_isa_irq(void __iomem * address)
1da177e4 1000{
02f1175c
JS		 1001 int irq;
1002 unsigned long irqs, flags;
1003 int save_xir, save_car;
1004 int index = 0; /* IRQ probing is only for ISA */
1005
1006 /* forget possible initially masked and pending IRQ */
1007 irq = probe_irq_off(probe_irq_on());
1008
1009 /* Clear interrupts on the board first */
1010 cy_writeb(address + (Cy_ClrIntr << index), 0);
1011 /* Cy_ClrIntr is 0x1800 */
1012
1013 irqs = probe_irq_on();
1014 /* Wait ... */
1015 udelay(5000L);
1016
1017 /* Enable the Tx interrupts on the CD1400 */
1018 local_irq_save(flags);
1019 cy_writeb(address + (CyCAR << index), 0);
1020 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
1021
1022 cy_writeb(address + (CyCAR << index), 0);
1023 cy_writeb(address + (CySRER << index),
1024 cy_readb(address + (CySRER << index)) | CyTxRdy);
1025 local_irq_restore(flags);
1026
1027 /* Wait ... */
1028 udelay(5000L);
1029
1030 /* Check which interrupt is in use */
1031 irq = probe_irq_off(irqs);
1032
1033 /* Clean up */
1034 save_xir = (u_char) cy_readb(address + (CyTIR << index));
1035 save_car = cy_readb(address + (CyCAR << index));
1036 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1037 cy_writeb(address + (CySRER << index),
1038 cy_readb(address + (CySRER << index)) & ~CyTxRdy);
1039 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1040 cy_writeb(address + (CyCAR << index), (save_car));
1041 cy_writeb(address + (Cy_ClrIntr << index), 0);
1042 /* Cy_ClrIntr is 0x1800 */
1043
1044 return (irq > 0) ? irq : 0;
1da177e4 1045}
02f1175c 1046#endif /* CONFIG_ISA */
1da177e4 1047
e941027f 1048static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
02f1175c 1049 void __iomem * base_addr, int status, int index)
e941027f
JS		 1050{
1051 struct cyclades_port *info;
1052 struct tty_struct *tty;
1053 volatile int char_count;
1054 int i, j, len, mdm_change, mdm_status, outch;
1055 int save_xir, channel, save_car;
1056 char data;
1057
02f1175c 1058 if (status & CySRReceive) { /* reception interrupt */
e941027f 1059#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1060 printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
e941027f 1061#endif
02f1175c
JS		 1062 /* determine the channel & change to that context */
1063 spin_lock(&cinfo->card_lock);
1064 save_xir = (u_char) cy_readb(base_addr + (CyRIR << index));
1065 channel = (u_short) (save_xir & CyIRChannel);
1066 i = channel + chip * 4 + cinfo->first_line;
1067 info = &cy_port[i];
1068 info->last_active = jiffies;
1069 save_car = cy_readb(base_addr + (CyCAR << index));
1070 cy_writeb(base_addr + (CyCAR << index), save_xir);
1071
1072 /* if there is nowhere to put the data, discard it */
1073 if (info->tty == 0) {
1074 j = (cy_readb(base_addr + (CyRIVR << index)) &
1075 CyIVRMask);
1076 if (j == CyIVRRxEx) { /* exception */
1077 data = cy_readb(base_addr + (CyRDSR << index));
1078 } else { /* normal character reception */
1079 char_count = cy_readb(base_addr +
1080 (CyRDCR << index));
1081 while (char_count--) {
1082 data = cy_readb(base_addr +
1083 (CyRDSR << index));
e941027f 1084 }
e941027f 1085 }
02f1175c
JS		 1086 } else { /* there is an open port for this data */
1087 tty = info->tty;
1088 j = (cy_readb(base_addr + (CyRIVR << index)) &
1089 CyIVRMask);
1090 if (j == CyIVRRxEx) { /* exception */
1091 data = cy_readb(base_addr + (CyRDSR << index));
1092
1093 /* For statistics only */
1094 if (data & CyBREAK)
1095 info->icount.brk++;
1096 else if (data & CyFRAME)
1097 info->icount.frame++;
1098 else if (data & CyPARITY)
1099 info->icount.parity++;
1100 else if (data & CyOVERRUN)
1101 info->icount.overrun++;
1102
1103 if (data & info->ignore_status_mask) {
1104 info->icount.rx++;
1105 return;
1106 }
1107 if (tty_buffer_request_room(tty, 1)) {
1108 if (data & info->read_status_mask) {
1109 if (data & CyBREAK) {
1110 tty_insert_flip_char(
1111 tty,
1112 cy_readb(
1113 base_addr +
1114 (CyRDSR <<
1115 index)),
1116 TTY_BREAK);
1117 info->icount.rx++;
1118 if (info->flags &
1119 ASYNC_SAK) {
1120 do_SAK(tty);
1121 }
1122 } else if (data & CyFRAME) {
1123 tty_insert_flip_char(
1124 tty,
1125 cy_readb(
1126 base_addr +
1127 (CyRDSR <<
1128 index)),
1129 TTY_FRAME);
1130 info->icount.rx++;
1131 info->idle_stats.
1132 frame_errs++;
1133 } else if (data & CyPARITY) {
1134 /* Pieces of seven... */
1135 tty_insert_flip_char(
1136 tty,
1137 cy_readb(
1138 base_addr +
1139 (CyRDSR <<
1140 index)),
1141 TTY_PARITY);
1142 info->icount.rx++;
1143 info->idle_stats.
1144 parity_errs++;
1145 } else if (data & CyOVERRUN) {
1146 tty_insert_flip_char(
1147 tty, 0,
1148 TTY_OVERRUN);
1149 info->icount.rx++;
1150 /* If the flip buffer itself is
1151 overflowing, we still lose
1152 the next incoming character.
1153 */
1154 tty_insert_flip_char(
1155 tty,
1156 cy_readb(
1157 base_addr +
1158 (CyRDSR <<
1159 index)),
1160 TTY_FRAME);
1161 info->icount.rx++;
1162 info->idle_stats.
1163 overruns++;
1164 /* These two conditions may imply */
1165 /* a normal read should be done. */
1166 /* }else if(data & CyTIMEOUT){ */
1167 /* }else if(data & CySPECHAR){ */
1168 } else {
1169 tty_insert_flip_char(
1170 tty, 0,
1171 TTY_NORMAL);
1172 info->icount.rx++;
1173 }
1174 } else {
1175 tty_insert_flip_char(tty, 0,
1176 TTY_NORMAL);
1177 info->icount.rx++;
1178 }
1179 } else {
1180 /* there was a software buffer
1181 overrun and nothing could be
1182 done about it!!! */
1183 info->icount.buf_overrun++;
1184 info->idle_stats.overruns++;
1185 }
1186 } else { /* normal character reception */
1187 /* load # chars available from the chip */
1188 char_count = cy_readb(base_addr +
1189 (CyRDCR << index));
e941027f
JS		 1190
1191#ifdef CY_ENABLE_MONITORING
02f1175c
JS		 1192 ++info->mon.int_count;
1193 info->mon.char_count += char_count;
1194 if (char_count > info->mon.char_max)
1195 info->mon.char_max = char_count;
1196 info->mon.char_last = char_count;
e941027f 1197#endif
02f1175c
JS		 1198 len = tty_buffer_request_room(tty, char_count);
1199 while (len--) {
1200 data = cy_readb(base_addr +
1201 (CyRDSR << index));
1202 tty_insert_flip_char(tty, data,
1203 TTY_NORMAL);
1204 info->idle_stats.recv_bytes++;
1205 info->icount.rx++;
e941027f 1206#ifdef CY_16Y_HACK
02f1175c 1207 udelay(10L);
e941027f 1208#endif
02f1175c
JS		 1209 }
1210 info->idle_stats.recv_idle = jiffies;
1211 }
1212 tty_schedule_flip(tty);
e941027f 1213 }
02f1175c
JS		 1214 /* end of service */
1215 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1216 cy_writeb(base_addr + (CyCAR << index), (save_car));
1217 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1218 }
1219
02f1175c
JS		 1220 if (status & CySRTransmit) { /* transmission interrupt */
1221 /* Since we only get here when the transmit buffer
1222 is empty, we know we can always stuff a dozen
1223 characters. */
e941027f 1224#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1225 printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
e941027f
JS		 1226#endif
1227
02f1175c
JS		 1228 /* determine the channel & change to that context */
1229 spin_lock(&cinfo->card_lock);
1230 save_xir = (u_char) cy_readb(base_addr + (CyTIR << index));
1231 channel = (u_short) (save_xir & CyIRChannel);
1232 i = channel + chip * 4 + cinfo->first_line;
1233 save_car = cy_readb(base_addr + (CyCAR << index));
1234 cy_writeb(base_addr + (CyCAR << index), save_xir);
1235
1236 /* validate the port# (as configured and open) */
1237 if ((i < 0) || (NR_PORTS <= i)) {
1238 cy_writeb(base_addr + (CySRER << index),
1239 cy_readb(base_addr + (CySRER << index)) &
1240 ~CyTxRdy);
1241 goto txend;
e941027f 1242 }
02f1175c
JS		 1243 info = &cy_port[i];
1244 info->last_active = jiffies;
1245 if (info->tty == 0) {
1246 cy_writeb(base_addr + (CySRER << index),
1247 cy_readb(base_addr + (CySRER << index)) &
1248 ~CyTxRdy);
1249 goto txdone;
e941027f 1250 }
02f1175c
JS		 1251
1252 /* load the on-chip space for outbound data */
1253 char_count = info->xmit_fifo_size;
1254
1255 if (info->x_char) { /* send special char */
1256 outch = info->x_char;
1257 cy_writeb(base_addr + (CyTDR << index), outch);
1258 char_count--;
1259 info->icount.tx++;
1260 info->x_char = 0;
e941027f 1261 }
02f1175c
JS		 1262
1263 if (info->breakon || info->breakoff) {
1264 if (info->breakon) {
1265 cy_writeb(base_addr + (CyTDR << index), 0);
1266 cy_writeb(base_addr + (CyTDR << index), 0x81);
1267 info->breakon = 0;
1268 char_count -= 2;
1269 }
1270 if (info->breakoff) {
1271 cy_writeb(base_addr + (CyTDR << index), 0);
1272 cy_writeb(base_addr + (CyTDR << index), 0x83);
1273 info->breakoff = 0;
1274 char_count -= 2;
1275 }
e941027f 1276 }
02f1175c
JS		 1277
1278 while (char_count-- > 0) {
1279 if (!info->xmit_cnt) {
1280 if (cy_readb(base_addr + (CySRER << index)) &
1281 CyTxMpty) {
1282 cy_writeb(base_addr + (CySRER << index),
1283 cy_readb(base_addr +
1284 (CySRER << index)) &
1285 ~CyTxMpty);
1286 } else {
1287 cy_writeb(base_addr + (CySRER << index),
1288 (cy_readb(base_addr +
1289 (CySRER << index)) &
1290 ~CyTxRdy) | CyTxMpty);
1291 }
1292 goto txdone;
1293 }
1294 if (info->xmit_buf == 0) {
1295 cy_writeb(base_addr + (CySRER << index),
1296 cy_readb(base_addr + (CySRER << index))&
1297 ~CyTxRdy);
1298 goto txdone;
1299 }
1300 if (info->tty->stopped || info->tty->hw_stopped) {
1301 cy_writeb(base_addr + (CySRER << index),
1302 cy_readb(base_addr + (CySRER << index))&
1303 ~CyTxRdy);
1304 goto txdone;
1305 }
1306 /* Because the Embedded Transmit Commands have
1307 been enabled, we must check to see if the
1308 escape character, NULL, is being sent. If it
1309 is, we must ensure that there is room for it
1310 to be doubled in the output stream. Therefore
1311 we no longer advance the pointer when the
1312 character is fetched, but rather wait until
1313 after the check for a NULL output character.
1314 This is necessary because there may not be
1315 room for the two chars needed to send a NULL.)
1316 */
1317 outch = info->xmit_buf[info->xmit_tail];
1318 if (outch) {
1319 info->xmit_cnt--;
1320 info->xmit_tail = (info->xmit_tail + 1) &
1321 (SERIAL_XMIT_SIZE - 1);
1322 cy_writeb(base_addr + (CyTDR << index), outch);
1323 info->icount.tx++;
1324 } else {
1325 if (char_count > 1) {
1326 info->xmit_cnt--;
1327 info->xmit_tail = (info->xmit_tail + 1)&
1328 (SERIAL_XMIT_SIZE - 1);
1329 cy_writeb(base_addr + (CyTDR << index),
1330 outch);
1331 cy_writeb(base_addr + (CyTDR << index),
1332 0);
1333 info->icount.tx++;
1334 char_count--;
1335 } else {
1336 }
1337 }
e941027f 1338 }
e941027f
JS		 1339
1340txdone:
02f1175c
JS		 1341 if (info->xmit_cnt < WAKEUP_CHARS) {
1342 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1343 }
e941027f 1344txend:
02f1175c
JS		 1345 /* end of service */
1346 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1347 cy_writeb(base_addr + (CyCAR << index), (save_car));
1348 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1349 }
1350
02f1175c 1351 if (status & CySRModem) { /* modem interrupt */
e941027f 1352
02f1175c
JS		 1353 /* determine the channel & change to that context */
1354 spin_lock(&cinfo->card_lock);
1355 save_xir = (u_char) cy_readb(base_addr + (CyMIR << index));
1356 channel = (u_short) (save_xir & CyIRChannel);
1357 info = &cy_port[channel + chip * 4 + cinfo->first_line];
1358 info->last_active = jiffies;
1359 save_car = cy_readb(base_addr + (CyCAR << index));
1360 cy_writeb(base_addr + (CyCAR << index), save_xir);
1361
1362 mdm_change = cy_readb(base_addr + (CyMISR << index));
1363 mdm_status = cy_readb(base_addr + (CyMSVR1 << index));
1364
1365 if (info->tty == 0) { /* no place for data, ignore it */
1366 ;
1367 } else {
1368 if (mdm_change & CyANY_DELTA) {
1369 /* For statistics only */
1370 if (mdm_change & CyDCD)
1371 info->icount.dcd++;
1372 if (mdm_change & CyCTS)
1373 info->icount.cts++;
1374 if (mdm_change & CyDSR)
1375 info->icount.dsr++;
1376 if (mdm_change & CyRI)
1377 info->icount.rng++;
1378
1379 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
e941027f 1380 }
02f1175c
JS		 1381
1382 if ((mdm_change & CyDCD) &&
1383 (info->flags & ASYNC_CHECK_CD)) {
1384 if (mdm_status & CyDCD) {
1385 cy_sched_event(info,
1386 Cy_EVENT_OPEN_WAKEUP);
1387 } else {
1388 cy_sched_event(info, Cy_EVENT_HANGUP);
1389 }
1390 }
1391 if ((mdm_change & CyCTS) &&
1392 (info->flags & ASYNC_CTS_FLOW)) {
1393 if (info->tty->hw_stopped) {
1394 if (mdm_status & CyCTS) {
1395 /* cy_start isn't used
1396 because... !!! */
1397 info->tty->hw_stopped = 0;
1398 cy_writeb(base_addr +
1399 (CySRER << index),
1400 cy_readb(base_addr +
1401 (CySRER <<
1402 index))|
1403 CyTxRdy);
1404 cy_sched_event(info,
1405 Cy_EVENT_WRITE_WAKEUP);
1406 }
1407 } else {
1408 if (!(mdm_status & CyCTS)) {
1409 /* cy_stop isn't used
1410 because ... !!! */
1411 info->tty->hw_stopped = 1;
1412 cy_writeb(base_addr +
1413 (CySRER << index),
1414 cy_readb(base_addr +
1415 (CySRER <<
1416 index)) &
1417 ~CyTxRdy);
1418 }
1419 }
1420 }
1421 if (mdm_change & CyDSR) {
1422 }
1423 if (mdm_change & CyRI) {
e941027f 1424 }
e941027f 1425 }
02f1175c
JS		 1426 /* end of service */
1427 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1428 cy_writeb(base_addr + (CyCAR << index), save_car);
1429 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1430 }
1431}
1432
1da177e4
LT		 1433/* The real interrupt service routine is called
1434 whenever the card wants its hand held--chars
1435 received, out buffer empty, modem change, etc.
1436 */
02f1175c 1437static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1da177e4 1438{
02f1175c
JS		 1439 int status;
1440 struct cyclades_card *cinfo;
1441 void __iomem *base_addr, *card_base_addr;
1442 int chip;
1443 int index;
1444 int too_many;
1445 int had_work;
1446
1447 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1da177e4 1448#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1449 printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
1da177e4 1450#endif
02f1175c
JS		 1451 return IRQ_NONE; /* spurious interrupt */
1452 }
1453
1454 card_base_addr = cinfo->base_addr;
1455 index = cinfo->bus_index;
1456
1457 /* This loop checks all chips in the card. Make a note whenever
1458 _any_ chip had some work to do, as this is considered an
1459 indication that there will be more to do. Only when no chip
1460 has any work does this outermost loop exit.
1461 */
1462 do {
1463 had_work = 0;
1464 for (chip = 0; chip < cinfo->num_chips; chip++) {
1465 base_addr = cinfo->base_addr +
1466 (cy_chip_offset[chip] << index);
1467 too_many = 0;
1468 while ((status = cy_readb(base_addr +
1469 (CySVRR << index))) != 0x00) {
1470 had_work++;
1471 /* The purpose of the following test is to ensure that
1472 no chip can monopolize the driver. This forces the
1473 chips to be checked in a round-robin fashion (after
1474 draining each of a bunch (1000) of characters).
1475 */
1476 if (1000 < too_many++) {
1477 break;
1478 }
1479 cyy_intr_chip(cinfo, chip, base_addr, status,
1480 index);
1481 }
1482 }
1483 } while (had_work);
1484
1485 /* clear interrupts */
1486 spin_lock(&cinfo->card_lock);
1487 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1488 /* Cy_ClrIntr is 0x1800 */
1489 spin_unlock(&cinfo->card_lock);
1490 return IRQ_HANDLED;
1491} /* cyy_interrupt */
1da177e4
LT		 1492
1493/***********************************************************/
1494/********* End of block of Cyclom-Y specific code **********/
1495/******** Start of block of Cyclades-Z specific code *********/
1496/***********************************************************/
1497
1498static int
02f1175c 1499cyz_fetch_msg(struct cyclades_card *cinfo,
1a86b5e3 1500 __u32 * channel, __u8 * cmd, __u32 * param)
1da177e4 1501{
02f1175c
JS		 1502 struct FIRM_ID __iomem *firm_id;
1503 struct ZFW_CTRL __iomem *zfw_ctrl;
1504 struct BOARD_CTRL __iomem *board_ctrl;
1505 unsigned long loc_doorbell;
1506
1507 firm_id = cinfo->base_addr + ID_ADDRESS;
1508 if (!ISZLOADED(*cinfo)) {
096dcfce 1509 return -1;
02f1175c
JS		 1510 }
1511 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1512 0xfffff);
1513 board_ctrl = &zfw_ctrl->board_ctrl;
1514
1515 loc_doorbell = cy_readl(&((struct RUNTIME_9060 __iomem *)
1516 (cinfo->ctl_addr))->loc_doorbell);
1517 if (loc_doorbell) {
1518 *cmd = (char)(0xff & loc_doorbell);
1519 *channel = cy_readl(&board_ctrl->fwcmd_channel);
1a86b5e3 1520 *param = (__u32) cy_readl(&board_ctrl->fwcmd_param);
02f1175c
JS		 1521 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1522 loc_doorbell, 0xffffffff);
1523 return 1;
1524 }
1525 return 0;
1526} /* cyz_fetch_msg */
1da177e4
LT		 1527
1528static int
02f1175c 1529cyz_issue_cmd(struct cyclades_card *cinfo,
1a86b5e3 1530 __u32 channel, __u8 cmd, __u32 param)
1da177e4 1531{
02f1175c
JS		 1532 struct FIRM_ID __iomem *firm_id;
1533 struct ZFW_CTRL __iomem *zfw_ctrl;
1534 struct BOARD_CTRL __iomem *board_ctrl;
1a86b5e3 1535 __u32 __iomem *pci_doorbell;
02f1175c
JS		 1536 int index;
1537
1538 firm_id = cinfo->base_addr + ID_ADDRESS;
1539 if (!ISZLOADED(*cinfo)) {
096dcfce 1540 return -1;
02f1175c
JS		 1541 }
1542 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1543 0xfffff);
1544 board_ctrl = &zfw_ctrl->board_ctrl;
1545
1546 index = 0;
1547 pci_doorbell =
1548 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1549 while ((cy_readl(pci_doorbell) & 0xff) != 0) {
1550 if (index++ == 1000) {
096dcfce 1551 return (int)(cy_readl(pci_doorbell) & 0xff);
02f1175c
JS		 1552 }
1553 udelay(50L);
1554 }
1555 cy_writel(&board_ctrl->hcmd_channel, channel);
1556 cy_writel(&board_ctrl->hcmd_param, param);
1557 cy_writel(pci_doorbell, (long)cmd);
1558
096dcfce 1559 return 0;
02f1175c 1560} /* cyz_issue_cmd */
1da177e4
LT		 1561
1562static void
1563cyz_handle_rx(struct cyclades_port *info,
02f1175c
JS		 1564 volatile struct CH_CTRL __iomem * ch_ctrl,
1565 volatile struct BUF_CTRL __iomem * buf_ctrl)
1da177e4 1566{
02f1175c
JS		 1567 struct cyclades_card *cinfo = &cy_card[info->card];
1568 struct tty_struct *tty = info->tty;
1569 volatile int char_count;
1570 int len;
1da177e4 1571#ifdef BLOCKMOVE
02f1175c 1572 int small_count;
1da177e4 1573#else
02f1175c 1574 char data;
1da177e4 1575#endif
1a86b5e3 1576 volatile __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1da177e4 1577
02f1175c
JS		 1578 rx_get = new_rx_get = cy_readl(&buf_ctrl->rx_get);
1579 rx_put = cy_readl(&buf_ctrl->rx_put);
1580 rx_bufsize = cy_readl(&buf_ctrl->rx_bufsize);
1581 rx_bufaddr = cy_readl(&buf_ctrl->rx_bufaddr);
1582 if (rx_put >= rx_get)
1583 char_count = rx_put - rx_get;
1584 else
1585 char_count = rx_put - rx_get + rx_bufsize;
1da177e4 1586
02f1175c
JS		 1587 if (char_count) {
1588 info->last_active = jiffies;
1589 info->jiffies[1] = jiffies;
1da177e4
LT		 1590
1591#ifdef CY_ENABLE_MONITORING
02f1175c
JS		 1592 info->mon.int_count++;
1593 info->mon.char_count += char_count;
1594 if (char_count > info->mon.char_max)
1595 info->mon.char_max = char_count;
1596 info->mon.char_last = char_count;
1da177e4 1597#endif
02f1175c
JS		 1598 if (tty == 0) {
1599 /* flush received characters */
1600 new_rx_get = (new_rx_get + char_count) &
1601 (rx_bufsize - 1);
1602 info->rflush_count++;
1603 } else {
1da177e4 1604#ifdef BLOCKMOVE
02f1175c
JS		 1605 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1606 for performance, but because of buffer boundaries, there
1607 may be several steps to the operation */
1608 while (0 < (small_count = min_t(unsigned int,
1609 rx_bufsize - new_rx_get,
1610 min_t(unsigned int, TTY_FLIPBUF_SIZE -
1611 tty->flip.count, char_count)))){
1612 memcpy_fromio(tty->flip.char_buf_ptr,
1613 (char *)(cinfo->base_addr + rx_bufaddr +
1614 new_rx_get),
1615 small_count);
1616
1617 tty->flip.char_buf_ptr += small_count;
1618 memset(tty->flip.flag_buf_ptr, TTY_NORMAL,
1619 small_count);
1620 tty->flip.flag_buf_ptr += small_count;
1621 new_rx_get = (new_rx_get + small_count) &
1622 (rx_bufsize - 1);
1623 char_count -= small_count;
1624 info->icount.rx += small_count;
1625 info->idle_stats.recv_bytes += small_count;
1626 tty->flip.count += small_count;
1627 }
1da177e4 1628#else
02f1175c
JS		 1629 len = tty_buffer_request_room(tty, char_count);
1630 while (len--) {
1631 data = cy_readb(cinfo->base_addr + rx_bufaddr +
1632 new_rx_get);
1633 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1634 tty_insert_flip_char(tty, data, TTY_NORMAL);
1635 info->idle_stats.recv_bytes++;
1636 info->icount.rx++;
1637 }
1da177e4
LT		 1638#endif
1639#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1640 /* Recalculate the number of chars in the RX buffer and issue
1641 a cmd in case it's higher than the RX high water mark */
1642 rx_put = cy_readl(&buf_ctrl->rx_put);
1643 if (rx_put >= rx_get)
1644 char_count = rx_put - rx_get;
1645 else
1646 char_count = rx_put - rx_get + rx_bufsize;
90cc3018
JS		 1647 if (char_count >= (int)cy_readl(&buf_ctrl->
1648 rx_threshold)) {
02f1175c
JS		 1649 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1650 }
1da177e4 1651#endif
02f1175c
JS		 1652 info->idle_stats.recv_idle = jiffies;
1653 tty_schedule_flip(tty);
1654 }
1655 /* Update rx_get */
1656 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1da177e4 1657 }
1da177e4
LT		 1658}
1659
1660static void
1661cyz_handle_tx(struct cyclades_port *info,
02f1175c
JS		 1662 volatile struct CH_CTRL __iomem * ch_ctrl,
1663 volatile struct BUF_CTRL __iomem * buf_ctrl)
1da177e4 1664{
02f1175c
JS		 1665 struct cyclades_card *cinfo = &cy_card[info->card];
1666 struct tty_struct *tty = info->tty;
1667 char data;
1668 volatile int char_count;
1da177e4 1669#ifdef BLOCKMOVE
02f1175c 1670 int small_count;
1da177e4 1671#endif
1a86b5e3 1672 volatile __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1da177e4 1673
02f1175c
JS		 1674 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1675 return;
1da177e4 1676
02f1175c
JS		 1677 tx_get = cy_readl(&buf_ctrl->tx_get);
1678 tx_put = cy_readl(&buf_ctrl->tx_put);
1679 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
1680 tx_bufaddr = cy_readl(&buf_ctrl->tx_bufaddr);
1681 if (tx_put >= tx_get)
1682 char_count = tx_get - tx_put - 1 + tx_bufsize;
1683 else
1684 char_count = tx_get - tx_put - 1;
1da177e4 1685
02f1175c 1686 if (char_count) {
1da177e4 1687
02f1175c
JS		 1688 if (tty == 0) {
1689 goto ztxdone;
1690 }
1da177e4 1691
02f1175c
JS		 1692 if (info->x_char) { /* send special char */
1693 data = info->x_char;
1da177e4 1694
02f1175c
JS		 1695 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1696 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1697 info->x_char = 0;
1698 char_count--;
1699 info->icount.tx++;
1700 info->last_active = jiffies;
1701 info->jiffies[2] = jiffies;
1702 }
1da177e4 1703#ifdef BLOCKMOVE
02f1175c
JS		 1704 while (0 < (small_count = min_t(unsigned int,
1705 tx_bufsize - tx_put, min_t(unsigned int,
1706 (SERIAL_XMIT_SIZE - info->xmit_tail),
1707 min_t(unsigned int, info->xmit_cnt,
1708 char_count))))) {
1709
1710 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1711 tx_put),
1712 &info->xmit_buf[info->xmit_tail],
1713 small_count);
1714
1715 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1716 char_count -= small_count;
1717 info->icount.tx += small_count;
1718 info->xmit_cnt -= small_count;
1719 info->xmit_tail = (info->xmit_tail + small_count) &
1720 (SERIAL_XMIT_SIZE - 1);
1721 info->last_active = jiffies;
1722 info->jiffies[2] = jiffies;
1723 }
1da177e4 1724#else
02f1175c
JS		 1725 while (info->xmit_cnt && char_count) {
1726 data = info->xmit_buf[info->xmit_tail];
1727 info->xmit_cnt--;
1728 info->xmit_tail = (info->xmit_tail + 1) &
1729 (SERIAL_XMIT_SIZE - 1);
1730
1731 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1732 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1733 char_count--;
1734 info->icount.tx++;
1735 info->last_active = jiffies;
1736 info->jiffies[2] = jiffies;
1737 }
1da177e4 1738#endif
02f1175c
JS		 1739ztxdone:
1740 if (info->xmit_cnt < WAKEUP_CHARS) {
1741 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1742 }
1743 /* Update tx_put */
1744 cy_writel(&buf_ctrl->tx_put, tx_put);
1da177e4 1745 }
1da177e4
LT		 1746}
1747
02f1175c 1748static void cyz_handle_cmd(struct cyclades_card *cinfo)
1da177e4 1749{
02f1175c
JS		 1750 struct tty_struct *tty;
1751 struct cyclades_port *info;
1752 static volatile struct FIRM_ID __iomem *firm_id;
1753 static volatile struct ZFW_CTRL __iomem *zfw_ctrl;
1754 static volatile struct BOARD_CTRL __iomem *board_ctrl;
1755 static volatile struct CH_CTRL __iomem *ch_ctrl;
1756 static volatile struct BUF_CTRL __iomem *buf_ctrl;
1a86b5e3
KK		 1757 __u32 channel;
1758 __u8 cmd;
1759 __u32 param;
1760 __u32 hw_ver, fw_ver;
02f1175c
JS		 1761 int special_count;
1762 int delta_count;
1763
1764 firm_id = cinfo->base_addr + ID_ADDRESS;
1765 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1766 0xfffff);
1767 board_ctrl = &zfw_ctrl->board_ctrl;
1768 fw_ver = cy_readl(&board_ctrl->fw_version);
1769 hw_ver = cy_readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1770 mail_box_0);
1771
1772 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1773 special_count = 0;
1774 delta_count = 0;
1775 info = &cy_port[channel + cinfo->first_line];
1776 if ((tty = info->tty) == 0) {
1777 continue;
1da177e4 1778 }
02f1175c
JS		 1779 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1780 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1781
1782 switch (cmd) {
1783 case C_CM_PR_ERROR:
1784 tty_insert_flip_char(tty, 0, TTY_PARITY);
1785 info->icount.rx++;
1786 special_count++;
1787 break;
1788 case C_CM_FR_ERROR:
1789 tty_insert_flip_char(tty, 0, TTY_FRAME);
1790 info->icount.rx++;
1791 special_count++;
1792 break;
1793 case C_CM_RXBRK:
1794 tty_insert_flip_char(tty, 0, TTY_BREAK);
1795 info->icount.rx++;
1796 special_count++;
1797 break;
1798 case C_CM_MDCD:
1799 info->icount.dcd++;
1800 delta_count++;
1801 if (info->flags & ASYNC_CHECK_CD) {
1802 if ((fw_ver > 241 ? ((u_long) param) :
1803 cy_readl(&ch_ctrl->rs_status)) &
1804 C_RS_DCD) {
1805 cy_sched_event(info,
1806 Cy_EVENT_OPEN_WAKEUP);
1807 } else {
1808 cy_sched_event(info, Cy_EVENT_HANGUP);
1809 }
1810 }
1811 break;
1812 case C_CM_MCTS:
1813 info->icount.cts++;
1814 delta_count++;
1815 break;
1816 case C_CM_MRI:
1817 info->icount.rng++;
1818 delta_count++;
1819 break;
1820 case C_CM_MDSR:
1821 info->icount.dsr++;
1822 delta_count++;
1823 break;
1da177e4 1824#ifdef Z_WAKE
02f1175c
JS		 1825 case C_CM_IOCTLW:
1826 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1827 break;
1da177e4
LT		 1828#endif
1829#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1830 case C_CM_RXHIWM:
1831 case C_CM_RXNNDT:
1832 case C_CM_INTBACK2:
1833 /* Reception Interrupt */
1da177e4 1834#ifdef CY_DEBUG_INTERRUPTS
02f1175c
JS		 1835 printk("cyz_interrupt: rcvd intr, card %d, "
1836 "port %ld\n\r", info->card, channel);
1da177e4 1837#endif
02f1175c
JS		 1838 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1839 break;
1840 case C_CM_TXBEMPTY:
1841 case C_CM_TXLOWWM:
1842 case C_CM_INTBACK:
1843 /* Transmission Interrupt */
1da177e4 1844#ifdef CY_DEBUG_INTERRUPTS
02f1175c
JS		 1845 printk("cyz_interrupt: xmit intr, card %d, "
1846 "port %ld\n\r", info->card, channel);
1da177e4 1847#endif
02f1175c
JS		 1848 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1849 break;
1850#endif /* CONFIG_CYZ_INTR */
1851 case C_CM_FATAL:
1852 /* should do something with this !!! */
1853 break;
1854 default:
1855 break;
1856 }
1857 if (delta_count)
1858 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1859 if (special_count)
1860 tty_schedule_flip(tty);
1da177e4 1861 }
1da177e4
LT		 1862}
1863
1864#ifdef CONFIG_CYZ_INTR
02f1175c 1865static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1da177e4 1866{
02f1175c 1867 struct cyclades_card *cinfo;
1da177e4 1868
02f1175c 1869 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1da177e4 1870#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1871 printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
1da177e4 1872#endif
02f1175c
JS		 1873 return IRQ_NONE; /* spurious interrupt */
1874 }
1da177e4 1875
02f1175c 1876 if (!ISZLOADED(*cinfo)) {
1da177e4 1877#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1878 printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq);
1da177e4 1879#endif
02f1175c
JS		 1880 return IRQ_NONE;
1881 }
1da177e4 1882
02f1175c
JS		 1883 /* Handle the interrupts */
1884 cyz_handle_cmd(cinfo);
1da177e4 1885
02f1175c
JS		 1886 return IRQ_HANDLED;
1887} /* cyz_interrupt */
1da177e4 1888
02f1175c 1889static void cyz_rx_restart(unsigned long arg)
1da177e4 1890{
02f1175c
JS		 1891 struct cyclades_port *info = (struct cyclades_port *)arg;
1892 int retval;
1893 int card = info->card;
1a86b5e3 1894 __u32 channel = (info->line) - (cy_card[card].first_line);
02f1175c
JS		 1895 unsigned long flags;
1896
1897 CY_LOCK(info, flags);
1898 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
1899 if (retval != 0) {
1900 printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1901 info->line, retval);
1902 }
1903 cyz_rx_full_timer[info->line].function = NULL;
1904 CY_UNLOCK(info, flags);
1da177e4
LT		 1905}
1906
02f1175c 1907#else /* CONFIG_CYZ_INTR */
1da177e4 1908
02f1175c 1909static void cyz_poll(unsigned long arg)
1da177e4 1910{
02f1175c
JS		 1911 struct cyclades_card *cinfo;
1912 struct cyclades_port *info;
1913 struct tty_struct *tty;
1914 static volatile struct FIRM_ID *firm_id;
1915 static volatile struct ZFW_CTRL *zfw_ctrl;
1916 static volatile struct BOARD_CTRL *board_ctrl;
1917 static volatile struct CH_CTRL *ch_ctrl;
1918 static volatile struct BUF_CTRL *buf_ctrl;
1919 int card, port;
1da177e4 1920
02f1175c
JS		 1921 cyz_timerlist.expires = jiffies + (HZ);
1922 for (card = 0; card < NR_CARDS; card++) {
1923 cinfo = &cy_card[card];
1924
1925 if (!IS_CYC_Z(*cinfo))
1926 continue;
1927 if (!ISZLOADED(*cinfo))
1928 continue;
1929
1930 firm_id = cinfo->base_addr + ID_ADDRESS;
1931 zfw_ctrl = cinfo->base_addr +
1932 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1933 board_ctrl = &(zfw_ctrl->board_ctrl);
1da177e4
LT		 1934
1935 /* Skip first polling cycle to avoid racing conditions with the FW */
02f1175c
JS		 1936 if (!cinfo->intr_enabled) {
1937 cinfo->nports = (int)cy_readl(&board_ctrl->n_channel);
1938 cinfo->intr_enabled = 1;
1939 continue;
1940 }
1da177e4 1941
02f1175c 1942 cyz_handle_cmd(cinfo);
1da177e4 1943
02f1175c
JS		 1944 for (port = 0; port < cinfo->nports; port++) {
1945 info = &cy_port[port + cinfo->first_line];
1946 tty = info->tty;
1947 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1948 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1da177e4 1949
02f1175c
JS		 1950 if (!info->throttle)
1951 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1952 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1953 }
1954 /* poll every 'cyz_polling_cycle' period */
1955 cyz_timerlist.expires = jiffies + cyz_polling_cycle;
1da177e4 1956 }
02f1175c 1957 add_timer(&cyz_timerlist);
02f1175c 1958} /* cyz_poll */
1da177e4 1959
02f1175c 1960#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 1961
1962/********** End of block of Cyclades-Z specific code *********/
1963/***********************************************************/
1964
1da177e4
LT		 1965/* This is called whenever a port becomes active;
1966 interrupts are enabled and DTR & RTS are turned on.
1967 */
02f1175c 1968static int startup(struct cyclades_port *info)
1da177e4 1969{
02f1175c
JS		 1970 unsigned long flags;
1971 int retval = 0;
1972 void __iomem *base_addr;
1973 int card, chip, channel, index;
1974 unsigned long page;
1da177e4 1975
02f1175c
JS		 1976 card = info->card;
1977 channel = (info->line) - (cy_card[card].first_line);
1da177e4 1978
02f1175c
JS		 1979 page = get_zeroed_page(GFP_KERNEL);
1980 if (!page)
1981 return -ENOMEM;
1da177e4 1982
02f1175c 1983 CY_LOCK(info, flags);
1da177e4 1984
02f1175c
JS		 1985 if (info->flags & ASYNC_INITIALIZED) {
1986 free_page(page);
1987 goto errout;
1988 }
1da177e4 1989
02f1175c
JS		 1990 if (!info->type) {
1991 if (info->tty) {
1992 set_bit(TTY_IO_ERROR, &info->tty->flags);
1993 }
1994 free_page(page);
1995 goto errout;
1996 }
1da177e4 1997
02f1175c
JS		 1998 if (info->xmit_buf)
1999 free_page(page);
2000 else
2001 info->xmit_buf = (unsigned char *)page;
1da177e4 2002
02f1175c 2003 CY_UNLOCK(info, flags);
1da177e4 2004
02f1175c 2005 set_line_char(info);
1da177e4 2006
02f1175c
JS		 2007 if (!IS_CYC_Z(cy_card[card])) {
2008 chip = channel >> 2;
2009 channel &= 0x03;
2010 index = cy_card[card].bus_index;
2011 base_addr = cy_card[card].base_addr +
2012 (cy_chip_offset[chip] << index);
1da177e4
LT		 2013
2014#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2015 printk("cyc startup card %d, chip %d, channel %d, "
2016 "base_addr %lx\n",
2017 card, chip, channel, (long)base_addr);
2018 /**/
1da177e4 2019#endif
02f1175c 2020 CY_LOCK(info, flags);
1da177e4 2021
02f1175c 2022 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1da177e4 2023
02f1175c
JS		 2024 cy_writeb(base_addr + (CyRTPR << index),
2025 (info->default_timeout ? info->default_timeout : 0x02));
2026 /* 10ms rx timeout */
1da177e4 2027
02f1175c
JS		 2028 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
2029 index);
1da177e4 2030
02f1175c
JS		 2031 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2032 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
2033 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1da177e4
LT		 2034
2035#ifdef CY_DEBUG_DTR
02f1175c
JS		 2036 printk("cyc:startup raising DTR\n");
2037 printk(" status: 0x%x, 0x%x\n",
2038 cy_readb(base_addr + (CyMSVR1 << index)),
2039 cy_readb(base_addr + (CyMSVR2 << index)));
1da177e4
LT		 2040#endif
2041
02f1175c
JS		 2042 cy_writeb(base_addr + (CySRER << index),
2043 cy_readb(base_addr + (CySRER << index)) | CyRxData);
2044 info->flags |= ASYNC_INITIALIZED;
1da177e4 2045
02f1175c
JS		 2046 if (info->tty) {
2047 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2048 }
2049 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2050 info->breakon = info->breakoff = 0;
2051 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2052 info->idle_stats.in_use =
2053 info->idle_stats.recv_idle =
2054 info->idle_stats.xmit_idle = jiffies;
1da177e4 2055
02f1175c 2056 CY_UNLOCK(info, flags);
1da177e4 2057
02f1175c
JS		 2058 } else {
2059 struct FIRM_ID __iomem *firm_id;
2060 struct ZFW_CTRL __iomem *zfw_ctrl;
2061 struct BOARD_CTRL __iomem *board_ctrl;
2062 struct CH_CTRL __iomem *ch_ctrl;
2063 int retval;
1da177e4 2064
02f1175c 2065 base_addr = cy_card[card].base_addr;
1da177e4 2066
02f1175c
JS		 2067 firm_id = base_addr + ID_ADDRESS;
2068 if (!ISZLOADED(cy_card[card])) {
2069 return -ENODEV;
2070 }
1da177e4 2071
02f1175c
JS		 2072 zfw_ctrl = cy_card[card].base_addr +
2073 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2074 board_ctrl = &zfw_ctrl->board_ctrl;
2075 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4
LT		 2076
2077#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2078 printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
2079 card, channel, (long)base_addr);
2080 /**/
1da177e4 2081#endif
02f1175c 2082 CY_LOCK(info, flags);
1da177e4 2083
02f1175c 2084 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1da177e4
LT		 2085#ifdef Z_WAKE
2086#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 2087 cy_writel(&ch_ctrl[channel].intr_enable,
2088 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2089 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1da177e4 2090#else
02f1175c
JS		 2091 cy_writel(&ch_ctrl[channel].intr_enable,
2092 C_IN_IOCTLW | C_IN_MDCD);
2093#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 2094#else
2095#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 2096 cy_writel(&ch_ctrl[channel].intr_enable,
2097 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2098 C_IN_RXNNDT | C_IN_MDCD);
1da177e4 2099#else
02f1175c
JS		 2100 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2101#endif /* CONFIG_CYZ_INTR */
2102#endif /* Z_WAKE */
2103
2104 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
2105 if (retval != 0) {
2106 printk("cyc:startup(1) retval on ttyC%d was %x\n",
2107 info->line, retval);
2108 }
1da177e4 2109
02f1175c
JS		 2110 /* Flush RX buffers before raising DTR and RTS */
2111 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX,
2112 0L);
2113 if (retval != 0) {
2114 printk("cyc:startup(2) retval on ttyC%d was %x\n",
2115 info->line, retval);
2116 }
1da177e4 2117
02f1175c
JS		 2118 /* set timeout !!! */
2119 /* set RTS and DTR !!! */
2120 cy_writel(&ch_ctrl[channel].rs_control,
2121 cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2122 C_RS_DTR);
2123 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2124 C_CM_IOCTLM, 0L);
2125 if (retval != 0) {
2126 printk("cyc:startup(3) retval on ttyC%d was %x\n",
2127 info->line, retval);
2128 }
1da177e4 2129#ifdef CY_DEBUG_DTR
02f1175c 2130 printk("cyc:startup raising Z DTR\n");
1da177e4
LT		 2131#endif
2132
02f1175c
JS		 2133 /* enable send, recv, modem !!! */
2134
2135 info->flags |= ASYNC_INITIALIZED;
2136 if (info->tty) {
2137 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2138 }
2139 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2140 info->breakon = info->breakoff = 0;
2141 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2142 info->idle_stats.in_use =
2143 info->idle_stats.recv_idle =
2144 info->idle_stats.xmit_idle = jiffies;
1da177e4 2145
02f1175c 2146 CY_UNLOCK(info, flags);
1da177e4 2147 }
1da177e4
LT		 2148
2149#ifdef CY_DEBUG_OPEN
2150 printk(" cyc startup done\n");
2151#endif
2152 return 0;
2153
2154errout:
2155 CY_UNLOCK(info, flags);
2156 return retval;
02f1175c 2157} /* startup */
1da177e4 2158
02f1175c 2159static void start_xmit(struct cyclades_port *info)
1da177e4 2160{
02f1175c
JS		 2161 unsigned long flags;
2162 void __iomem *base_addr;
2163 int card, chip, channel, index;
1da177e4 2164
02f1175c
JS		 2165 card = info->card;
2166 channel = (info->line) - (cy_card[card].first_line);
2167 if (!IS_CYC_Z(cy_card[card])) {
2168 chip = channel >> 2;
2169 channel &= 0x03;
2170 index = cy_card[card].bus_index;
2171 base_addr = cy_card[card].base_addr +
2172 (cy_chip_offset[chip] << index);
2173
2174 CY_LOCK(info, flags);
2175 cy_writeb(base_addr + (CyCAR << index), channel);
2176 cy_writeb(base_addr + (CySRER << index),
2177 cy_readb(base_addr + (CySRER << index)) | CyTxRdy);
2178 CY_UNLOCK(info, flags);
2179 } else {
1da177e4 2180#ifdef CONFIG_CYZ_INTR
02f1175c 2181 int retval;
1da177e4 2182
02f1175c
JS		 2183 CY_LOCK(info, flags);
2184 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK,
2185 0L);
2186 if (retval != 0) {
2187 printk("cyc:start_xmit retval on ttyC%d was %x\n",
2188 info->line, retval);
2189 }
2190 CY_UNLOCK(info, flags);
2191#else /* CONFIG_CYZ_INTR */
2192 /* Don't have to do anything at this time */
2193#endif /* CONFIG_CYZ_INTR */
2194 }
2195} /* start_xmit */
1da177e4
LT		 2196
2197/*
2198 * This routine shuts down a serial port; interrupts are disabled,
2199 * and DTR is dropped if the hangup on close termio flag is on.
2200 */
02f1175c 2201static void shutdown(struct cyclades_port *info)
1da177e4 2202{
02f1175c
JS		 2203 unsigned long flags;
2204 void __iomem *base_addr;
2205 int card, chip, channel, index;
2206
2207 if (!(info->flags & ASYNC_INITIALIZED)) {
2208 return;
2209 }
2210
2211 card = info->card;
2212 channel = info->line - cy_card[card].first_line;
2213 if (!IS_CYC_Z(cy_card[card])) {
2214 chip = channel >> 2;
2215 channel &= 0x03;
2216 index = cy_card[card].bus_index;
2217 base_addr = cy_card[card].base_addr +
2218 (cy_chip_offset[chip] << index);
1da177e4
LT		 2219
2220#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2221 printk("cyc shutdown Y card %d, chip %d, channel %d, "
2222 "base_addr %lx\n",
2223 card, chip, channel, (long)base_addr);
1da177e4
LT		 2224#endif
2225
02f1175c
JS		 2226 CY_LOCK(info, flags);
2227
2228 /* Clear delta_msr_wait queue to avoid mem leaks. */
2229 wake_up_interruptible(&info->delta_msr_wait);
1da177e4 2230
02f1175c
JS		 2231 if (info->xmit_buf) {
2232 unsigned char *temp;
2233 temp = info->xmit_buf;
2234 info->xmit_buf = NULL;
2235 free_page((unsigned long)temp);
2236 }
2237 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2238 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2239 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2240 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
1da177e4 2241#ifdef CY_DEBUG_DTR
02f1175c
JS		 2242 printk("cyc shutdown dropping DTR\n");
2243 printk(" status: 0x%x, 0x%x\n",
2244 cy_readb(base_addr + (CyMSVR1 << index)),
2245 cy_readb(base_addr + (CyMSVR2 << index)));
1da177e4 2246#endif
02f1175c
JS		 2247 }
2248 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2249 /* it may be appropriate to clear _XMIT at
2250 some later date (after testing)!!! */
2251
2252 if (info->tty) {
2253 set_bit(TTY_IO_ERROR, &info->tty->flags);
2254 }
2255 info->flags &= ~ASYNC_INITIALIZED;
2256 CY_UNLOCK(info, flags);
2257 } else {
2258 struct FIRM_ID __iomem *firm_id;
2259 struct ZFW_CTRL __iomem *zfw_ctrl;
2260 struct BOARD_CTRL __iomem *board_ctrl;
2261 struct CH_CTRL __iomem *ch_ctrl;
2262 int retval;
2263
2264 base_addr = cy_card[card].base_addr;
1da177e4 2265#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2266 printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
2267 card, channel, (long)base_addr);
1da177e4
LT		 2268#endif
2269
02f1175c
JS		 2270 firm_id = base_addr + ID_ADDRESS;
2271 if (!ISZLOADED(cy_card[card])) {
2272 return;
2273 }
1da177e4 2274
02f1175c
JS		 2275 zfw_ctrl = cy_card[card].base_addr +
2276 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2277 board_ctrl = &zfw_ctrl->board_ctrl;
2278 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4 2279
02f1175c 2280 CY_LOCK(info, flags);
1da177e4 2281
02f1175c
JS		 2282 if (info->xmit_buf) {
2283 unsigned char *temp;
2284 temp = info->xmit_buf;
2285 info->xmit_buf = NULL;
2286 free_page((unsigned long)temp);
1da177e4 2287 }
02f1175c
JS		 2288
2289 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2290 cy_writel(&ch_ctrl[channel].rs_control,
1a86b5e3 2291 (__u32)(cy_readl(&ch_ctrl[channel].rs_control)&
02f1175c
JS		 2292 ~(C_RS_RTS | C_RS_DTR)));
2293 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2294 C_CM_IOCTLM, 0L);
2295 if (retval != 0) {
2296 printk("cyc:shutdown retval on ttyC%d was %x\n",
2297 info->line, retval);
2298 }
1da177e4 2299#ifdef CY_DEBUG_DTR
02f1175c 2300 printk("cyc:shutdown dropping Z DTR\n");
1da177e4 2301#endif
02f1175c 2302 }
1da177e4 2303
02f1175c
JS		 2304 if (info->tty) {
2305 set_bit(TTY_IO_ERROR, &info->tty->flags);
2306 }
2307 info->flags &= ~ASYNC_INITIALIZED;
2308
2309 CY_UNLOCK(info, flags);
2310 }
1da177e4
LT		 2311
2312#ifdef CY_DEBUG_OPEN
02f1175c 2313 printk(" cyc shutdown done\n");
1da177e4 2314#endif
02f1175c 2315} /* shutdown */
1da177e4
LT		 2316
2317/*
2318 * ------------------------------------------------------------
2319 * cy_open() and friends
2320 * ------------------------------------------------------------
2321 */
2322
2323static int
02f1175c
JS		 2324block_til_ready(struct tty_struct *tty, struct file *filp,
2325 struct cyclades_port *info)
1da177e4 2326{
02f1175c
JS		 2327 DECLARE_WAITQUEUE(wait, current);
2328 struct cyclades_card *cinfo;
2329 unsigned long flags;
2330 int chip, channel, index;
2331 int retval;
2332 void __iomem *base_addr;
2333
2334 cinfo = &cy_card[info->card];
2335 channel = info->line - cinfo->first_line;
2336
2337 /*
2338 * If the device is in the middle of being closed, then block
2339 * until it's done, and then try again.
2340 */
2341 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2342 if (info->flags & ASYNC_CLOSING) {
2343 interruptible_sleep_on(&info->close_wait);
2344 }
096dcfce 2345 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
1da177e4 2346 }
02f1175c
JS		 2347
2348 /*
2349 * If non-blocking mode is set, then make the check up front
2350 * and then exit.
2351 */
2352 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2353 info->flags |= ASYNC_NORMAL_ACTIVE;
2354 return 0;
2355 }
2356
2357 /*
2358 * Block waiting for the carrier detect and the line to become
2359 * free (i.e., not in use by the callout). While we are in
2360 * this loop, info->count is dropped by one, so that
2361 * cy_close() knows when to free things. We restore it upon
2362 * exit, either normal or abnormal.
2363 */
2364 retval = 0;
2365 add_wait_queue(&info->open_wait, &wait);
1da177e4 2366#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2367 printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
2368 info->line, info->count);
2369 /**/
1da177e4 2370#endif
02f1175c
JS		 2371 CY_LOCK(info, flags);
2372 if (!tty_hung_up_p(filp))
2373 info->count--;
2374 CY_UNLOCK(info, flags);
1da177e4 2375#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2376 printk("cyc block_til_ready: (%d): decrementing count to %d\n",
2377 current->pid, info->count);
1da177e4 2378#endif
02f1175c
JS		 2379 info->blocked_open++;
2380
2381 if (!IS_CYC_Z(*cinfo)) {
2382 chip = channel >> 2;
2383 channel &= 0x03;
2384 index = cinfo->bus_index;
2385 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2386
2387 while (1) {
2388 CY_LOCK(info, flags);
2389 if ((tty->termios->c_cflag & CBAUD)) {
2390 cy_writeb(base_addr + (CyCAR << index),
2391 (u_char) channel);
2392 cy_writeb(base_addr + (CyMSVR1 << index),
2393 CyRTS);
2394 cy_writeb(base_addr + (CyMSVR2 << index),
2395 CyDTR);
1da177e4 2396#ifdef CY_DEBUG_DTR
02f1175c
JS		 2397 printk("cyc:block_til_ready raising DTR\n");
2398 printk(" status: 0x%x, 0x%x\n",
2399 cy_readb(base_addr +
2400 (CyMSVR1 << index)),
2401 cy_readb(base_addr +
2402 (CyMSVR2 << index)));
1da177e4 2403#endif
02f1175c
JS		 2404 }
2405 CY_UNLOCK(info, flags);
1da177e4 2406
02f1175c
JS		 2407 set_current_state(TASK_INTERRUPTIBLE);
2408 if (tty_hung_up_p(filp) ||
2409 !(info->flags & ASYNC_INITIALIZED)) {
2410 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2411 -EAGAIN : -ERESTARTSYS);
2412 break;
2413 }
1da177e4 2414
02f1175c
JS		 2415 CY_LOCK(info, flags);
2416 cy_writeb(base_addr + (CyCAR << index),
2417 (u_char) channel);
2418 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2419 (cy_readb(base_addr +
2420 (CyMSVR1 << index)) & CyDCD))) {
2421 CY_UNLOCK(info, flags);
2422 break;
2423 }
1da177e4 2424 CY_UNLOCK(info, flags);
1da177e4 2425
02f1175c
JS		 2426 if (signal_pending(current)) {
2427 retval = -ERESTARTSYS;
2428 break;
2429 }
1da177e4 2430#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2431 printk("cyc block_til_ready blocking: ttyC%d, "
2432 "count = %d\n",
2433 info->line, info->count);
2434 /**/
1da177e4 2435#endif
02f1175c 2436 schedule();
1da177e4 2437 }
02f1175c
JS		 2438 } else {
2439 struct FIRM_ID __iomem *firm_id;
2440 struct ZFW_CTRL __iomem *zfw_ctrl;
2441 struct BOARD_CTRL __iomem *board_ctrl;
2442 struct CH_CTRL __iomem *ch_ctrl;
2443 int retval;
2444
2445 base_addr = cinfo->base_addr;
2446 firm_id = base_addr + ID_ADDRESS;
2447 if (!ISZLOADED(*cinfo)) {
2448 current->state = TASK_RUNNING;
2449 remove_wait_queue(&info->open_wait, &wait);
2450 return -EINVAL;
2451 }
2452
2453 zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
2454 0xfffff);
2455 board_ctrl = &zfw_ctrl->board_ctrl;
2456 ch_ctrl = zfw_ctrl->ch_ctrl;
2457
2458 while (1) {
2459 if ((tty->termios->c_cflag & CBAUD)) {
2460 cy_writel(&ch_ctrl[channel].rs_control,
2461 cy_readl(&ch_ctrl[channel].
2462 rs_control) | (C_RS_RTS |
2463 C_RS_DTR));
2464 retval = cyz_issue_cmd(&cy_card[info->card],
2465 channel, C_CM_IOCTLM, 0L);
2466 if (retval != 0) {
2467 printk("cyc:block_til_ready retval on "
2468 "ttyC%d was %x\n",
2469 info->line, retval);
2470 }
1da177e4 2471#ifdef CY_DEBUG_DTR
02f1175c 2472 printk("cyc:block_til_ready raising Z DTR\n");
1da177e4 2473#endif
02f1175c 2474 }
1da177e4 2475
02f1175c
JS		 2476 set_current_state(TASK_INTERRUPTIBLE);
2477 if (tty_hung_up_p(filp) ||
2478 !(info->flags & ASYNC_INITIALIZED)) {
2479 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2480 -EAGAIN : -ERESTARTSYS);
2481 break;
2482 }
2483 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2484 (cy_readl(&ch_ctrl[channel].rs_status) &
2485 C_RS_DCD))) {
2486 break;
2487 }
2488 if (signal_pending(current)) {
2489 retval = -ERESTARTSYS;
2490 break;
2491 }
1da177e4 2492#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2493 printk("cyc block_til_ready blocking: ttyC%d, "
2494 "count = %d\n",
2495 info->line, info->count);
2496 /**/
1da177e4 2497#endif
02f1175c
JS		 2498 schedule();
2499 }
1da177e4 2500 }
02f1175c
JS		 2501 current->state = TASK_RUNNING;
2502 remove_wait_queue(&info->open_wait, &wait);
2503 if (!tty_hung_up_p(filp)) {
2504 info->count++;
1da177e4 2505#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2506 printk("cyc:block_til_ready (%d): incrementing count to %d\n",
2507 current->pid, info->count);
1da177e4 2508#endif
02f1175c
JS		 2509 }
2510 info->blocked_open--;
1da177e4 2511#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2512 printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
2513 info->line, info->count);
2514 /**/
1da177e4 2515#endif
02f1175c
JS		 2516 if (retval)
2517 return retval;
2518 info->flags |= ASYNC_NORMAL_ACTIVE;
2519 return 0;
2520} /* block_til_ready */
1da177e4
LT		 2521
2522/*
2523 * This routine is called whenever a serial port is opened. It
2524 * performs the serial-specific initialization for the tty structure.
2525 */
02f1175c 2526static int cy_open(struct tty_struct *tty, struct file *filp)
1da177e4 2527{
02f1175c
JS		 2528 struct cyclades_port *info;
2529 int retval, line;
1da177e4 2530
02f1175c
JS		 2531 line = tty->index;
2532 if ((line < 0) || (NR_PORTS <= line)) {
2533 return -ENODEV;
2534 }
2535 info = &cy_port[line];
2536 if (info->line < 0) {
2537 return -ENODEV;
2538 }
1da177e4 2539
02f1175c
JS		 2540 /* If the card's firmware hasn't been loaded,
2541 treat it as absent from the system. This
2542 will make the user pay attention.
2543 */
2544 if (IS_CYC_Z(cy_card[info->card])) {
2545 struct cyclades_card *cinfo = &cy_card[info->card];
2546 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2547
2548 if (!ISZLOADED(*cinfo)) {
2549 if (((ZE_V1 == cy_readl(
2550 &((struct RUNTIME_9060 __iomem *)
2551 (cinfo->ctl_addr))->mail_box_0)) &&
2552 Z_FPGA_CHECK(*cinfo)) &&
2553 (ZFIRM_HLT == cy_readl(
2554 &firm_id->signature))) {
2555 printk("cyc:Cyclades-Z Error: you need an "
2556 "external power supply for this number "
2557 "of ports.\n\rFirmware halted.\r\n");
2558 } else {
2559 printk("cyc:Cyclades-Z firmware not yet "
2560 "loaded\n");
2561 }
2562 return -ENODEV;
2563 }
2564#ifdef CONFIG_CYZ_INTR
2565 else {
2566 /* In case this Z board is operating in interrupt mode, its
2567 interrupts should be enabled as soon as the first open
2568 happens to one of its ports. */
2569 if (!cinfo->intr_enabled) {
2570 struct ZFW_CTRL __iomem *zfw_ctrl;
2571 struct BOARD_CTRL __iomem *board_ctrl;
2572
2573 zfw_ctrl = cinfo->base_addr +
2574 (cy_readl(&firm_id->zfwctrl_addr) &
2575 0xfffff);
2576
2577 board_ctrl = &zfw_ctrl->board_ctrl;
2578
2579 /* Enable interrupts on the PLX chip */
2580 cy_writew(cinfo->ctl_addr + 0x68,
2581 cy_readw(cinfo->ctl_addr +
2582 0x68) | 0x0900);
2583 /* Enable interrupts on the FW */
2584 retval = cyz_issue_cmd(cinfo, 0,
2585 C_CM_IRQ_ENBL, 0L);
2586 if (retval != 0) {
2587 printk("cyc:IRQ enable retval was %x\n",
2588 retval);
2589 }
2590 cinfo->nports =
2591 (int)cy_readl(&board_ctrl->n_channel);
2592 cinfo->intr_enabled = 1;
2593 }
1da177e4 2594 }
02f1175c
JS		 2595#endif /* CONFIG_CYZ_INTR */
2596 /* Make sure this Z port really exists in hardware */
2597 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2598 return -ENODEV;
1da177e4 2599 }
1da177e4 2600#ifdef CY_DEBUG_OTHER
02f1175c 2601 printk("cyc:cy_open ttyC%d\n", info->line); /* */
1da177e4 2602#endif
02f1175c
JS		 2603 tty->driver_data = info;
2604 info->tty = tty;
2605 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2606 return -ENODEV;
2607 }
1da177e4 2608#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2609 printk("cyc:cy_open ttyC%d, count = %d\n", info->line, info->count);
2610 /**/
1da177e4 2611#endif
02f1175c 2612 info->count++;
1da177e4 2613#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2614 printk("cyc:cy_open (%d): incrementing count to %d\n",
2615 current->pid, info->count);
1da177e4 2616#endif
1da177e4 2617
02f1175c
JS		 2618 /*
2619 * If the port is the middle of closing, bail out now
2620 */
2621 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2622 if (info->flags & ASYNC_CLOSING)
2623 interruptible_sleep_on(&info->close_wait);
096dcfce 2624 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
02f1175c 2625 }
1da177e4 2626
02f1175c
JS		 2627 /*
2628 * Start up serial port
2629 */
2630 retval = startup(info);
2631 if (retval) {
2632 return retval;
2633 }
1da177e4 2634
02f1175c
JS		 2635 retval = block_til_ready(tty, filp, info);
2636 if (retval) {
1da177e4 2637#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2638 printk("cyc:cy_open returning after block_til_ready with %d\n",
2639 retval);
1da177e4 2640#endif
02f1175c
JS		 2641 return retval;
2642 }
1da177e4 2643
02f1175c 2644 info->throttle = 0;
1da177e4 2645
02f1175c
JS		 2646#ifdef CY_DEBUG_OPEN
2647 printk(" cyc:cy_open done\n");
2648 /**/
2649#endif
2650 return 0;
2651} /* cy_open */
1da177e4
LT		 2652
2653/*
2654 * cy_wait_until_sent() --- wait until the transmitter is empty
2655 */
02f1175c 2656static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
1da177e4 2657{
02f1175c
JS		 2658 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2659 void __iomem *base_addr;
2660 int card, chip, channel, index;
2661 unsigned long orig_jiffies;
2662 int char_time;
2663
2664 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2665 return;
2666
2667 if (info->xmit_fifo_size == 0)
2668 return; /* Just in case.... */
1da177e4 2669
02f1175c
JS		 2670 orig_jiffies = jiffies;
2671 /*
2672 * Set the check interval to be 1/5 of the estimated time to
2673 * send a single character, and make it at least 1. The check
2674 * interval should also be less than the timeout.
2675 *
2676 * Note: we have to use pretty tight timings here to satisfy
2677 * the NIST-PCTS.
2678 */
2679 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2680 char_time = char_time / 5;
2681 if (char_time <= 0)
2682 char_time = 1;
2683 if (timeout < 0)
2684 timeout = 0;
2685 if (timeout)
2686 char_time = min(char_time, timeout);
2687 /*
2688 * If the transmitter hasn't cleared in twice the approximate
2689 * amount of time to send the entire FIFO, it probably won't
2690 * ever clear. This assumes the UART isn't doing flow
2691 * control, which is currently the case. Hence, if it ever
2692 * takes longer than info->timeout, this is probably due to a
2693 * UART bug of some kind. So, we clamp the timeout parameter at
2694 * 2*info->timeout.
2695 */
2696 if (!timeout || timeout > 2 * info->timeout)
2697 timeout = 2 * info->timeout;
1da177e4 2698#ifdef CY_DEBUG_WAIT_UNTIL_SENT
02f1175c
JS		 2699 printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
2700 printk("jiff=%lu...", jiffies);
1da177e4 2701#endif
02f1175c
JS		 2702 card = info->card;
2703 channel = (info->line) - (cy_card[card].first_line);
2704 if (!IS_CYC_Z(cy_card[card])) {
2705 chip = channel >> 2;
2706 channel &= 0x03;
2707 index = cy_card[card].bus_index;
2708 base_addr =
2709 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
2710 while (cy_readb(base_addr + (CySRER << index)) & CyTxRdy) {
1da177e4 2711#ifdef CY_DEBUG_WAIT_UNTIL_SENT
02f1175c 2712 printk("Not clean (jiff=%lu)...", jiffies);
1da177e4 2713#endif
02f1175c
JS		 2714 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2715 break;
2716 if (timeout && time_after(jiffies, orig_jiffies +
2717 timeout))
2718 break;
2719 }
2720 } else {
096dcfce 2721 /* Nothing to do! */
1da177e4 2722 }
02f1175c
JS		 2723 /* Run one more char cycle */
2724 msleep_interruptible(jiffies_to_msecs(char_time * 5));
1da177e4 2725#ifdef CY_DEBUG_WAIT_UNTIL_SENT
02f1175c 2726 printk("Clean (jiff=%lu)...done\n", jiffies);
1da177e4
LT		 2727#endif
2728}
2729
2730/*
2731 * This routine is called when a particular tty device is closed.
2732 */
02f1175c 2733static void cy_close(struct tty_struct *tty, struct file *filp)
1da177e4 2734{
02f1175c
JS		 2735 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2736 unsigned long flags;
1da177e4
LT		 2737
2738#ifdef CY_DEBUG_OTHER
02f1175c 2739 printk("cyc:cy_close ttyC%d\n", info->line);
1da177e4
LT		 2740#endif
2741
02f1175c
JS		 2742 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2743 return;
2744 }
1da177e4 2745
02f1175c
JS		 2746 CY_LOCK(info, flags);
2747 /* If the TTY is being hung up, nothing to do */
2748 if (tty_hung_up_p(filp)) {
2749 CY_UNLOCK(info, flags);
2750 return;
2751 }
1da177e4 2752#ifdef CY_DEBUG_OPEN
02f1175c 2753 printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
1da177e4 2754#endif
02f1175c
JS		 2755 if ((tty->count == 1) && (info->count != 1)) {
2756 /*
2757 * Uh, oh. tty->count is 1, which means that the tty
2758 * structure will be freed. Info->count should always
2759 * be one in these conditions. If it's greater than
2760 * one, we've got real problems, since it means the
2761 * serial port won't be shutdown.
2762 */
2763 printk("cyc:cy_close: bad serial port count; tty->count is 1, "
2764 "info->count is %d\n", info->count);
2765 info->count = 1;
2766 }
1da177e4 2767#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2768 printk("cyc:cy_close at (%d): decrementing count to %d\n",
2769 current->pid, info->count - 1);
1da177e4 2770#endif
02f1175c 2771 if (--info->count < 0) {
1da177e4 2772#ifdef CY_DEBUG_COUNT
02f1175c 2773 printk("cyc:cyc_close setting count to 0\n");
1da177e4 2774#endif
02f1175c 2775 info->count = 0;
1da177e4 2776 }
02f1175c
JS		 2777 if (info->count) {
2778 CY_UNLOCK(info, flags);
2779 return;
2780 }
2781 info->flags |= ASYNC_CLOSING;
1da177e4 2782
02f1175c
JS		 2783 /*
2784 * Now we wait for the transmit buffer to clear; and we notify
2785 * the line discipline to only process XON/XOFF characters.
2786 */
2787 tty->closing = 1;
2788 CY_UNLOCK(info, flags);
2789 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2790 tty_wait_until_sent(tty, info->closing_wait);
1da177e4 2791 }
02f1175c
JS		 2792 CY_LOCK(info, flags);
2793
2794 if (!IS_CYC_Z(cy_card[info->card])) {
2795 int channel = info->line - cy_card[info->card].first_line;
2796 int index = cy_card[info->card].bus_index;
2797 void __iomem *base_addr = cy_card[info->card].base_addr +
2798 (cy_chip_offset[channel >> 2] << index);
2799 /* Stop accepting input */
2800 channel &= 0x03;
2801 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2802 cy_writeb(base_addr + (CySRER << index),
2803 cy_readb(base_addr + (CySRER << index)) & ~CyRxData);
2804 if (info->flags & ASYNC_INITIALIZED) {
2805 /* Waiting for on-board buffers to be empty before closing
2806 the port */
2807 CY_UNLOCK(info, flags);
2808 cy_wait_until_sent(tty, info->timeout);
2809 CY_LOCK(info, flags);
2810 }
2811 } else {
2812#ifdef Z_WAKE
2813 /* Waiting for on-board buffers to be empty before closing the port */
2814 void __iomem *base_addr = cy_card[info->card].base_addr;
2815 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2816 struct ZFW_CTRL __iomem *zfw_ctrl =
2817 base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2818 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2819 int channel = info->line - cy_card[info->card].first_line;
2820 int retval;
2821
2822 if (cy_readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2823 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2824 C_CM_IOCTLW, 0L);
2825 if (retval != 0) {
2826 printk("cyc:cy_close retval on ttyC%d was %x\n",
2827 info->line, retval);
2828 }
2829 CY_UNLOCK(info, flags);
2830 interruptible_sleep_on(&info->shutdown_wait);
2831 CY_LOCK(info, flags);
2832 }
1da177e4 2833#endif
02f1175c
JS		 2834 }
2835
1da177e4 2836 CY_UNLOCK(info, flags);
02f1175c
JS		 2837 shutdown(info);
2838 if (tty->driver->flush_buffer)
2839 tty->driver->flush_buffer(tty);
2840 tty_ldisc_flush(tty);
1da177e4 2841 CY_LOCK(info, flags);
02f1175c
JS		 2842
2843 tty->closing = 0;
2844 info->event = 0;
2845 info->tty = NULL;
2846 if (info->blocked_open) {
2847 CY_UNLOCK(info, flags);
2848 if (info->close_delay) {
2849 msleep_interruptible(jiffies_to_msecs
2850 (info->close_delay));
2851 }
2852 wake_up_interruptible(&info->open_wait);
2853 CY_LOCK(info, flags);
2854 }
2855 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2856 wake_up_interruptible(&info->close_wait);
1da177e4
LT		 2857
2858#ifdef CY_DEBUG_OTHER
02f1175c 2859 printk(" cyc:cy_close done\n");
1da177e4
LT		 2860#endif
2861
02f1175c 2862 CY_UNLOCK(info, flags);
02f1175c 2863} /* cy_close */
1da177e4
LT		 2864
2865/* This routine gets called when tty_write has put something into
2866 * the write_queue. The characters may come from user space or
2867 * kernel space.
2868 *
2869 * This routine will return the number of characters actually
2870 * accepted for writing.
2871 *
2872 * If the port is not already transmitting stuff, start it off by
2873 * enabling interrupts. The interrupt service routine will then
2874 * ensure that the characters are sent.
2875 * If the port is already active, there is no need to kick it.
2876 *
2877 */
02f1175c 2878static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1da177e4 2879{
02f1175c
JS		 2880 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2881 unsigned long flags;
2882 int c, ret = 0;
1da177e4
LT		 2883
2884#ifdef CY_DEBUG_IO
02f1175c 2885 printk("cyc:cy_write ttyC%d\n", info->line); /* */
1da177e4
LT		 2886#endif
2887
02f1175c
JS		 2888 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2889 return 0;
2890 }
1da177e4 2891
02f1175c
JS		 2892 if (!info->xmit_buf)
2893 return 0;
1da177e4 2894
02f1175c
JS		 2895 CY_LOCK(info, flags);
2896 while (1) {
2897 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2898 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2899
2900 if (c <= 0)
2901 break;
2902
2903 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2904 info->xmit_head = (info->xmit_head + c) &
2905 (SERIAL_XMIT_SIZE - 1);
2906 info->xmit_cnt += c;
2907 buf += c;
2908 count -= c;
2909 ret += c;
2910 }
2911 CY_UNLOCK(info, flags);
2912
2913 info->idle_stats.xmit_bytes += ret;
2914 info->idle_stats.xmit_idle = jiffies;
2915
2916 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2917 start_xmit(info);
2918 }
2919 return ret;
2920} /* cy_write */
1da177e4
LT		 2921
2922/*
2923 * This routine is called by the kernel to write a single
2924 * character to the tty device. If the kernel uses this routine,
2925 * it must call the flush_chars() routine (if defined) when it is
2926 * done stuffing characters into the driver. If there is no room
2927 * in the queue, the character is ignored.
2928 */
02f1175c 2929static void cy_put_char(struct tty_struct *tty, unsigned char ch)
1da177e4 2930{
02f1175c
JS		 2931 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2932 unsigned long flags;
1da177e4
LT		 2933
2934#ifdef CY_DEBUG_IO
02f1175c 2935 printk("cyc:cy_put_char ttyC%d\n", info->line);
1da177e4
LT		 2936#endif
2937
02f1175c
JS		 2938 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2939 return;
1da177e4 2940
02f1175c
JS		 2941 if (!info->xmit_buf)
2942 return;
1da177e4 2943
02f1175c 2944 CY_LOCK(info, flags);
90cc3018 2945 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
02f1175c
JS		 2946 CY_UNLOCK(info, flags);
2947 return;
2948 }
1da177e4 2949
02f1175c
JS		 2950 info->xmit_buf[info->xmit_head++] = ch;
2951 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2952 info->xmit_cnt++;
1da177e4
LT		 2953 info->idle_stats.xmit_bytes++;
2954 info->idle_stats.xmit_idle = jiffies;
02f1175c
JS		 2955 CY_UNLOCK(info, flags);
2956} /* cy_put_char */
1da177e4
LT		 2957
2958/*
2959 * This routine is called by the kernel after it has written a
2960 * series of characters to the tty device using put_char().
2961 */
02f1175c 2962static void cy_flush_chars(struct tty_struct *tty)
1da177e4 2963{
02f1175c
JS		 2964 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2965
1da177e4 2966#ifdef CY_DEBUG_IO
02f1175c 2967 printk("cyc:cy_flush_chars ttyC%d\n", info->line); /* */
1da177e4
LT		 2968#endif
2969
02f1175c
JS		 2970 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2971 return;
1da177e4 2972
02f1175c
JS		 2973 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2974 !info->xmit_buf)
2975 return;
1da177e4 2976
02f1175c
JS		 2977 start_xmit(info);
2978} /* cy_flush_chars */
1da177e4
LT		 2979
2980/*
2981 * This routine returns the numbers of characters the tty driver
2982 * will accept for queuing to be written. This number is subject
2983 * to change as output buffers get emptied, or if the output flow
2984 * control is activated.
2985 */
02f1175c 2986static int cy_write_room(struct tty_struct *tty)
1da177e4 2987{
02f1175c
JS		 2988 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2989 int ret;
2990
1da177e4 2991#ifdef CY_DEBUG_IO
02f1175c 2992 printk("cyc:cy_write_room ttyC%d\n", info->line); /* */
1da177e4
LT		 2993#endif
2994
02f1175c
JS		 2995 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2996 return 0;
2997 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2998 if (ret < 0)
2999 ret = 0;
3000 return ret;
3001} /* cy_write_room */
1da177e4 3002
02f1175c 3003static int cy_chars_in_buffer(struct tty_struct *tty)
1da177e4 3004{
02f1175c
JS		 3005 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3006 int card, channel;
1da177e4 3007
02f1175c
JS		 3008 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
3009 return 0;
3010
3011 card = info->card;
3012 channel = (info->line) - (cy_card[card].first_line);
1da177e4
LT		 3013
3014#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c
JS		 3015 if (!IS_CYC_Z(cy_card[card])) {
3016#endif /* Z_EXT_CHARS_IN_BUFFER */
1da177e4 3017#ifdef CY_DEBUG_IO
02f1175c 3018 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt); /* */
1da177e4 3019#endif
02f1175c 3020 return info->xmit_cnt;
1da177e4 3021#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c
JS		 3022 } else {
3023 static volatile struct FIRM_ID *firm_id;
3024 static volatile struct ZFW_CTRL *zfw_ctrl;
3025 static volatile struct CH_CTRL *ch_ctrl;
3026 static volatile struct BUF_CTRL *buf_ctrl;
3027 int char_count;
1a86b5e3 3028 volatile __u32 tx_put, tx_get, tx_bufsize;
02f1175c
JS		 3029
3030 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3031 zfw_ctrl = cy_card[card].base_addr +
3032 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3033 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3034 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3035
3036 tx_get = cy_readl(&buf_ctrl->tx_get);
3037 tx_put = cy_readl(&buf_ctrl->tx_put);
3038 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
3039 if (tx_put >= tx_get)
3040 char_count = tx_put - tx_get;
3041 else
3042 char_count = tx_put - tx_get + tx_bufsize;
1da177e4 3043#ifdef CY_DEBUG_IO
02f1175c 3044 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt + char_count); /* */
1da177e4 3045#endif
096dcfce 3046 return info->xmit_cnt + char_count;
02f1175c
JS		 3047 }
3048#endif /* Z_EXT_CHARS_IN_BUFFER */
3049} /* cy_chars_in_buffer */
1da177e4
LT		 3050
3051/*
3052 * ------------------------------------------------------------
3053 * cy_ioctl() and friends
3054 * ------------------------------------------------------------
3055 */
3056
1a86b5e3 3057static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
1da177e4 3058{
02f1175c 3059 int co, co_val, bpr;
1a86b5e3 3060 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
02f1175c 3061 25000000);
1da177e4 3062
02f1175c
JS		 3063 if (baud == 0) {
3064 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3065 return;
3066 }
1da177e4 3067
02f1175c
JS		 3068 /* determine which prescaler to use */
3069 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3070 if (cy_clock / co_val / baud > 63)
3071 break;
3072 }
1da177e4 3073
02f1175c
JS		 3074 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3075 if (bpr > 255)
3076 bpr = 255;
1da177e4 3077
02f1175c
JS		 3078 info->tbpr = info->rbpr = bpr;
3079 info->tco = info->rco = co;
1da177e4
LT		 3080}
3081
3082/*
3083 * This routine finds or computes the various line characteristics.
3084 * It used to be called config_setup
3085 */
02f1175c 3086static void set_line_char(struct cyclades_port *info)
1da177e4 3087{
02f1175c
JS		 3088 unsigned long flags;
3089 void __iomem *base_addr;
3090 int card, chip, channel, index;
3091 unsigned cflag, iflag;
3092 unsigned short chip_number;
3093 int baud, baud_rate = 0;
3094 int i;
3095
3096 if (!info->tty || !info->tty->termios) {
3097 return;
1da177e4 3098 }
02f1175c
JS		 3099 if (info->line == -1) {
3100 return;
1da177e4 3101 }
02f1175c
JS		 3102 cflag = info->tty->termios->c_cflag;
3103 iflag = info->tty->termios->c_iflag;
1da177e4 3104
02f1175c
JS		 3105 /*
3106 * Set up the tty->alt_speed kludge
3107 */
3108 if (info->tty) {
3109 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3110 info->tty->alt_speed = 57600;
3111 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3112 info->tty->alt_speed = 115200;
3113 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3114 info->tty->alt_speed = 230400;
3115 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3116 info->tty->alt_speed = 460800;
1da177e4 3117 }
02f1175c
JS		 3118
3119 card = info->card;
3120 channel = (info->line) - (cy_card[card].first_line);
3121 chip_number = channel / 4;
3122
3123 if (!IS_CYC_Z(cy_card[card])) {
3124
3125 index = cy_card[card].bus_index;
3126
3127 /* baud rate */
3128 baud = tty_get_baud_rate(info->tty);
3129 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3130 ASYNC_SPD_CUST) {
3131 if (info->custom_divisor)
3132 baud_rate = info->baud / info->custom_divisor;
3133 else
3134 baud_rate = info->baud;
3135 } else if (baud > CD1400_MAX_SPEED) {
3136 baud = CD1400_MAX_SPEED;
3137 }
3138 /* find the baud index */
3139 for (i = 0; i < 20; i++) {
3140 if (baud == baud_table[i]) {
3141 break;
3142 }
3143 }
3144 if (i == 20) {
3145 i = 19; /* CD1400_MAX_SPEED */
3146 }
3147
3148 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3149 ASYNC_SPD_CUST) {
3150 cyy_baud_calc(info, baud_rate);
3151 } else {
3152 if (info->chip_rev >= CD1400_REV_J) {
3153 /* It is a CD1400 rev. J or later */
3154 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3155 info->tco = baud_co_60[i]; /* Tx CO */
3156 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3157 info->rco = baud_co_60[i]; /* Rx CO */
3158 } else {
3159 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3160 info->tco = baud_co_25[i]; /* Tx CO */
3161 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3162 info->rco = baud_co_25[i]; /* Rx CO */
3163 }
3164 }
3165 if (baud_table[i] == 134) {
3166 /* get it right for 134.5 baud */
3167 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3168 2;
3169 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3170 ASYNC_SPD_CUST) {
3171 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3172 baud_rate) + 2;
3173 } else if (baud_table[i]) {
3174 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3175 baud_table[i]) + 2;
3176 /* this needs to be propagated into the card info */
3177 } else {
3178 info->timeout = 0;
3179 }
3180 /* By tradition (is it a standard?) a baud rate of zero
3181 implies the line should be/has been closed. A bit
3182 later in this routine such a test is performed. */
3183
3184 /* byte size and parity */
3185 info->cor5 = 0;
3186 info->cor4 = 0;
3187 /* receive threshold */
3188 info->cor3 = (info->default_threshold ?
3189 info->default_threshold : baud_cor3[i]);
3190 info->cor2 = CyETC;
3191 switch (cflag & CSIZE) {
3192 case CS5:
3193 info->cor1 = Cy_5_BITS;
3194 break;
3195 case CS6:
3196 info->cor1 = Cy_6_BITS;
3197 break;
3198 case CS7:
3199 info->cor1 = Cy_7_BITS;
3200 break;
3201 case CS8:
3202 info->cor1 = Cy_8_BITS;
3203 break;
3204 }
3205 if (cflag & CSTOPB) {
3206 info->cor1 |= Cy_2_STOP;
3207 }
3208 if (cflag & PARENB) {
3209 if (cflag & PARODD) {
3210 info->cor1 |= CyPARITY_O;
3211 } else {
3212 info->cor1 |= CyPARITY_E;
3213 }
3214 } else {
3215 info->cor1 |= CyPARITY_NONE;
3216 }
3217
3218 /* CTS flow control flag */
3219 if (cflag & CRTSCTS) {
3220 info->flags |= ASYNC_CTS_FLOW;
3221 info->cor2 |= CyCtsAE;
3222 } else {
3223 info->flags &= ~ASYNC_CTS_FLOW;
3224 info->cor2 &= ~CyCtsAE;
3225 }
3226 if (cflag & CLOCAL)
3227 info->flags &= ~ASYNC_CHECK_CD;
3228 else
3229 info->flags |= ASYNC_CHECK_CD;
1da177e4
LT		 3230
3231 /***********************************************
3232 The hardware option, CyRtsAO, presents RTS when
3233 the chip has characters to send. Since most modems
3234 use RTS as reverse (inbound) flow control, this
3235 option is not used. If inbound flow control is
3236 necessary, DTR can be programmed to provide the
3237 appropriate signals for use with a non-standard
3238 cable. Contact Marcio Saito for details.
3239 ***********************************************/
3240
02f1175c
JS		 3241 chip = channel >> 2;
3242 channel &= 0x03;
3243 base_addr = cy_card[card].base_addr +
3244 (cy_chip_offset[chip] << index);
1da177e4 3245
02f1175c
JS		 3246 CY_LOCK(info, flags);
3247 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3248
3249 /* tx and rx baud rate */
3250
3251 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3252 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3253 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3254 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3255
3256 /* set line characteristics according configuration */
3257
3258 cy_writeb(base_addr + (CySCHR1 << index),
3259 START_CHAR(info->tty));
3260 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3261 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3262 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3263 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3264 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3265 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3266
3267 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3268 CyCOR3ch, index);
3269
3270 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3271 cy_writeb(base_addr + (CyRTPR << index),
3272 (info->default_timeout ? info->default_timeout : 0x02));
3273 /* 10ms rx timeout */
3274
3275 if (C_CLOCAL(info->tty)) {
3276 /* without modem intr */
3277 cy_writeb(base_addr + (CySRER << index),
3278 cy_readb(base_addr +
3279 (CySRER << index)) | CyMdmCh);
3280 /* act on 1->0 modem transitions */
3281 if ((cflag & CRTSCTS) && info->rflow) {
3282 cy_writeb(base_addr + (CyMCOR1 << index),
3283 (CyCTS | rflow_thr[i]));
3284 } else {
3285 cy_writeb(base_addr + (CyMCOR1 << index),
3286 CyCTS);
3287 }
3288 /* act on 0->1 modem transitions */
3289 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
1da177e4 3290 } else {
02f1175c
JS		 3291 /* without modem intr */
3292 cy_writeb(base_addr + (CySRER << index),
3293 cy_readb(base_addr +
3294 (CySRER << index)) | CyMdmCh);
3295 /* act on 1->0 modem transitions */
3296 if ((cflag & CRTSCTS) && info->rflow) {
3297 cy_writeb(base_addr + (CyMCOR1 << index),
3298 (CyDSR | CyCTS | CyRI | CyDCD |
3299 rflow_thr[i]));
3300 } else {
3301 cy_writeb(base_addr + (CyMCOR1 << index),
3302 CyDSR | CyCTS | CyRI | CyDCD);
3303 }
3304 /* act on 0->1 modem transitions */
3305 cy_writeb(base_addr + (CyMCOR2 << index),
3306 CyDSR | CyCTS | CyRI | CyDCD);
1da177e4 3307 }
02f1175c
JS		 3308
3309 if (i == 0) { /* baud rate is zero, turn off line */
3310 if (info->rtsdtr_inv) {
3311 cy_writeb(base_addr + (CyMSVR1 << index),
3312 ~CyRTS);
3313 } else {
3314 cy_writeb(base_addr + (CyMSVR2 << index),
3315 ~CyDTR);
3316 }
1da177e4 3317#ifdef CY_DEBUG_DTR
02f1175c
JS		 3318 printk("cyc:set_line_char dropping DTR\n");
3319 printk(" status: 0x%x, 0x%x\n",
3320 cy_readb(base_addr + (CyMSVR1 << index)),
3321 cy_readb(base_addr + (CyMSVR2 << index)));
1da177e4 3322#endif
02f1175c
JS		 3323 } else {
3324 if (info->rtsdtr_inv) {
3325 cy_writeb(base_addr + (CyMSVR1 << index),
3326 CyRTS);
3327 } else {
3328 cy_writeb(base_addr + (CyMSVR2 << index),
3329 CyDTR);
3330 }
1da177e4 3331#ifdef CY_DEBUG_DTR
02f1175c
JS		 3332 printk("cyc:set_line_char raising DTR\n");
3333 printk(" status: 0x%x, 0x%x\n",
3334 cy_readb(base_addr + (CyMSVR1 << index)),
3335 cy_readb(base_addr + (CyMSVR2 << index)));
1da177e4 3336#endif
02f1175c 3337 }
1da177e4 3338
02f1175c
JS		 3339 if (info->tty) {
3340 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3341 }
3342 CY_UNLOCK(info, flags);
1da177e4 3343
1da177e4 3344 } else {
02f1175c
JS		 3345 struct FIRM_ID __iomem *firm_id;
3346 struct ZFW_CTRL __iomem *zfw_ctrl;
3347 struct BOARD_CTRL __iomem *board_ctrl;
3348 struct CH_CTRL __iomem *ch_ctrl;
3349 struct BUF_CTRL __iomem *buf_ctrl;
1a86b5e3 3350 __u32 sw_flow;
02f1175c 3351 int retval;
1da177e4 3352
02f1175c
JS		 3353 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3354 if (!ISZLOADED(cy_card[card])) {
3355 return;
3356 }
1da177e4 3357
02f1175c
JS		 3358 zfw_ctrl = cy_card[card].base_addr +
3359 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3360 board_ctrl = &zfw_ctrl->board_ctrl;
3361 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3362 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3363
3364 /* baud rate */
3365 baud = tty_get_baud_rate(info->tty);
3366 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3367 ASYNC_SPD_CUST) {
3368 if (info->custom_divisor)
3369 baud_rate = info->baud / info->custom_divisor;
3370 else
3371 baud_rate = info->baud;
3372 } else if (baud > CYZ_MAX_SPEED) {
3373 baud = CYZ_MAX_SPEED;
3374 }
3375 cy_writel(&ch_ctrl->comm_baud, baud);
3376
3377 if (baud == 134) {
3378 /* get it right for 134.5 baud */
3379 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3380 2;
3381 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3382 ASYNC_SPD_CUST) {
3383 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3384 baud_rate) + 2;
3385 } else if (baud) {
3386 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3387 baud) + 2;
3388 /* this needs to be propagated into the card info */
3389 } else {
3390 info->timeout = 0;
3391 }
1da177e4 3392
02f1175c
JS		 3393 /* byte size and parity */
3394 switch (cflag & CSIZE) {
3395 case CS5:
3396 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3397 break;
3398 case CS6:
3399 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3400 break;
3401 case CS7:
3402 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3403 break;
3404 case CS8:
3405 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3406 break;
3407 }
3408 if (cflag & CSTOPB) {
3409 cy_writel(&ch_ctrl->comm_data_l,
3410 cy_readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3411 } else {
3412 cy_writel(&ch_ctrl->comm_data_l,
3413 cy_readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3414 }
3415 if (cflag & PARENB) {
3416 if (cflag & PARODD) {
3417 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3418 } else {
3419 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3420 }
3421 } else {
3422 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3423 }
1da177e4 3424
02f1175c
JS		 3425 /* CTS flow control flag */
3426 if (cflag & CRTSCTS) {
3427 cy_writel(&ch_ctrl->hw_flow,
3428 cy_readl(&ch_ctrl->
3429 hw_flow) | C_RS_CTS | C_RS_RTS);
3430 } else {
3431 cy_writel(&ch_ctrl->hw_flow,
3432 cy_readl(&ch_ctrl->
3433 hw_flow) & ~(C_RS_CTS | C_RS_RTS));
3434 }
3435 /* As the HW flow control is done in firmware, the driver
3436 doesn't need to care about it */
3437 info->flags &= ~ASYNC_CTS_FLOW;
3438
3439 /* XON/XOFF/XANY flow control flags */
3440 sw_flow = 0;
3441 if (iflag & IXON) {
3442 sw_flow |= C_FL_OXX;
3443 if (iflag & IXANY)
3444 sw_flow |= C_FL_OIXANY;
3445 }
3446 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3447
3448 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
3449 if (retval != 0) {
3450 printk("cyc:set_line_char retval on ttyC%d was %x\n",
3451 info->line, retval);
3452 }
3453
3454 /* CD sensitivity */
3455 if (cflag & CLOCAL) {
3456 info->flags &= ~ASYNC_CHECK_CD;
3457 } else {
3458 info->flags |= ASYNC_CHECK_CD;
3459 }
1da177e4 3460
02f1175c
JS		 3461 if (baud == 0) { /* baud rate is zero, turn off line */
3462 cy_writel(&ch_ctrl->rs_control,
3463 cy_readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
1da177e4 3464#ifdef CY_DEBUG_DTR
02f1175c 3465 printk("cyc:set_line_char dropping Z DTR\n");
1da177e4 3466#endif
02f1175c
JS		 3467 } else {
3468 cy_writel(&ch_ctrl->rs_control,
3469 cy_readl(&ch_ctrl->rs_control) | C_RS_DTR);
1da177e4 3470#ifdef CY_DEBUG_DTR
02f1175c 3471 printk("cyc:set_line_char raising Z DTR\n");
1da177e4 3472#endif
02f1175c 3473 }
1da177e4 3474
02f1175c
JS		 3475 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTLM,0L);
3476 if (retval != 0) {
3477 printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
3478 info->line, retval);
3479 }
1da177e4 3480
02f1175c
JS		 3481 if (info->tty) {
3482 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3483 }
1da177e4 3484 }
02f1175c 3485} /* set_line_char */
1da177e4
LT		 3486
3487static int
02f1175c
JS		 3488get_serial_info(struct cyclades_port *info,
3489 struct serial_struct __user * retinfo)
1da177e4 3490{
02f1175c
JS		 3491 struct serial_struct tmp;
3492 struct cyclades_card *cinfo = &cy_card[info->card];
1da177e4 3493
02f1175c
JS		 3494 if (!retinfo)
3495 return -EFAULT;
3496 memset(&tmp, 0, sizeof(tmp));
3497 tmp.type = info->type;
3498 tmp.line = info->line;
3499 tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
3500 tmp.irq = cinfo->irq;
3501 tmp.flags = info->flags;
3502 tmp.close_delay = info->close_delay;
d5dedf99 3503 tmp.closing_wait = info->closing_wait;
02f1175c
JS		 3504 tmp.baud_base = info->baud;
3505 tmp.custom_divisor = info->custom_divisor;
3506 tmp.hub6 = 0; /*!!! */
3507 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3508} /* get_serial_info */
1da177e4
LT		 3509
3510static int
02f1175c
JS		 3511set_serial_info(struct cyclades_port *info,
3512 struct serial_struct __user * new_info)
1da177e4 3513{
02f1175c
JS		 3514 struct serial_struct new_serial;
3515 struct cyclades_port old_info;
3516
3517 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3518 return -EFAULT;
3519 old_info = *info;
3520
3521 if (!capable(CAP_SYS_ADMIN)) {
3522 if (new_serial.close_delay != info->close_delay ||
3523 new_serial.baud_base != info->baud ||
3524 (new_serial.flags & ASYNC_FLAGS &
3525 ~ASYNC_USR_MASK) !=
3526 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3527 return -EPERM;
3528 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3529 (new_serial.flags & ASYNC_USR_MASK);
3530 info->baud = new_serial.baud_base;
3531 info->custom_divisor = new_serial.custom_divisor;
3532 goto check_and_exit;
3533 }
3534
3535 /*
3536 * OK, past this point, all the error checking has been done.
3537 * At this point, we start making changes.....
3538 */
3539
3540 info->baud = new_serial.baud_base;
3541 info->custom_divisor = new_serial.custom_divisor;
3542 info->flags = (info->flags & ~ASYNC_FLAGS) |
3543 (new_serial.flags & ASYNC_FLAGS);
3544 info->close_delay = new_serial.close_delay * HZ / 100;
3545 info->closing_wait = new_serial.closing_wait * HZ / 100;
1da177e4
LT		 3546
3547check_and_exit:
02f1175c
JS		 3548 if (info->flags & ASYNC_INITIALIZED) {
3549 set_line_char(info);
3550 return 0;
3551 } else {
3552 return startup(info);
3553 }
3554} /* set_serial_info */
1da177e4
LT		 3555
3556/*
3557 * get_lsr_info - get line status register info
3558 *
3559 * Purpose: Let user call ioctl() to get info when the UART physically
3560 * is emptied. On bus types like RS485, the transmitter must
3561 * release the bus after transmitting. This must be done when
3562 * the transmit shift register is empty, not be done when the
3563 * transmit holding register is empty. This functionality
3564 * allows an RS485 driver to be written in user space.
3565 */
02f1175c 3566static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
1da177e4 3567{
02f1175c
JS		 3568 int card, chip, channel, index;
3569 unsigned char status;
3570 unsigned int result;
3571 unsigned long flags;
3572 void __iomem *base_addr;
1da177e4 3573
02f1175c
JS		 3574 card = info->card;
3575 channel = (info->line) - (cy_card[card].first_line);
3576 if (!IS_CYC_Z(cy_card[card])) {
3577 chip = channel >> 2;
3578 channel &= 0x03;
3579 index = cy_card[card].bus_index;
3580 base_addr =
3581 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3582
3583 CY_LOCK(info, flags);
3584 status = cy_readb(base_addr + (CySRER << index)) &
3585 (CyTxRdy | CyTxMpty);
3586 CY_UNLOCK(info, flags);
3587 result = (status ? 0 : TIOCSER_TEMT);
3588 } else {
3589 /* Not supported yet */
3590 return -EINVAL;
3591 }
3592 return put_user(result, (unsigned long __user *)value);
1da177e4
LT		 3593}
3594
02f1175c 3595static int cy_tiocmget(struct tty_struct *tty, struct file *file)
1da177e4 3596{
02f1175c
JS		 3597 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3598 int card, chip, channel, index;
3599 void __iomem *base_addr;
3600 unsigned long flags;
3601 unsigned char status;
3602 unsigned long lstatus;
3603 unsigned int result;
3604 struct FIRM_ID __iomem *firm_id;
3605 struct ZFW_CTRL __iomem *zfw_ctrl;
3606 struct BOARD_CTRL __iomem *board_ctrl;
3607 struct CH_CTRL __iomem *ch_ctrl;
3608
3609 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3610 return -ENODEV;
1da177e4 3611
02f1175c
JS		 3612 card = info->card;
3613 channel = (info->line) - (cy_card[card].first_line);
3614 if (!IS_CYC_Z(cy_card[card])) {
3615 chip = channel >> 2;
3616 channel &= 0x03;
3617 index = cy_card[card].bus_index;
3618 base_addr =
3619 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
1da177e4 3620
02f1175c
JS		 3621 CY_LOCK(info, flags);
3622 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3623 status = cy_readb(base_addr + (CyMSVR1 << index));
3624 status |= cy_readb(base_addr + (CyMSVR2 << index));
3625 CY_UNLOCK(info, flags);
3626
3627 if (info->rtsdtr_inv) {
3628 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3629 ((status & CyDTR) ? TIOCM_RTS : 0);
3630 } else {
3631 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3632 ((status & CyDTR) ? TIOCM_DTR : 0);
3633 }
3634 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3635 ((status & CyRI) ? TIOCM_RNG : 0) |
3636 ((status & CyDSR) ? TIOCM_DSR : 0) |
3637 ((status & CyCTS) ? TIOCM_CTS : 0);
1da177e4 3638 } else {
02f1175c 3639 base_addr = cy_card[card].base_addr;
1da177e4 3640
02f1175c
JS		 3641 if (cy_card[card].num_chips != -1) {
3642 return -EINVAL;
3643 }
1da177e4 3644
02f1175c
JS		 3645 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3646 if (ISZLOADED(cy_card[card])) {
3647 zfw_ctrl = cy_card[card].base_addr +
3648 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3649 board_ctrl = &zfw_ctrl->board_ctrl;
3650 ch_ctrl = zfw_ctrl->ch_ctrl;
3651 lstatus = cy_readl(&ch_ctrl[channel].rs_status);
3652 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3653 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3654 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3655 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3656 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3657 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3658 } else {
3659 result = 0;
3660 return -ENODEV;
3661 }
1da177e4 3662
02f1175c
JS		 3663 }
3664 return result;
3665} /* cy_tiomget */
1da177e4
LT		 3666
3667static int
3668cy_tiocmset(struct tty_struct *tty, struct file *file,
02f1175c 3669 unsigned int set, unsigned int clear)
1da177e4 3670{
02f1175c
JS		 3671 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3672 int card, chip, channel, index;
3673 void __iomem *base_addr;
3674 unsigned long flags;
3675 struct FIRM_ID __iomem *firm_id;
3676 struct ZFW_CTRL __iomem *zfw_ctrl;
3677 struct BOARD_CTRL __iomem *board_ctrl;
3678 struct CH_CTRL __iomem *ch_ctrl;
3679 int retval;
3680
3681 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3682 return -ENODEV;
3683
3684 card = info->card;
3685 channel = (info->line) - (cy_card[card].first_line);
3686 if (!IS_CYC_Z(cy_card[card])) {
3687 chip = channel >> 2;
3688 channel &= 0x03;
3689 index = cy_card[card].bus_index;
3690 base_addr =
3691 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3692
3693 if (set & TIOCM_RTS) {
3694 CY_LOCK(info, flags);
3695 cy_writeb(base_addr + (CyCAR << index),
3696 (u_char) channel);
3697 if (info->rtsdtr_inv) {
3698 cy_writeb(base_addr + (CyMSVR2 << index),
3699 CyDTR);
3700 } else {
3701 cy_writeb(base_addr + (CyMSVR1 << index),
3702 CyRTS);
3703 }
3704 CY_UNLOCK(info, flags);
3705 }
3706 if (clear & TIOCM_RTS) {
3707 CY_LOCK(info, flags);
3708 cy_writeb(base_addr + (CyCAR << index),
3709 (u_char) channel);
3710 if (info->rtsdtr_inv) {
3711 cy_writeb(base_addr + (CyMSVR2 << index),
3712 ~CyDTR);
3713 } else {
3714 cy_writeb(base_addr + (CyMSVR1 << index),
3715 ~CyRTS);
3716 }
3717 CY_UNLOCK(info, flags);
3718 }
3719 if (set & 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 3730#ifdef CY_DEBUG_DTR
02f1175c
JS		 3731 printk("cyc:set_modem_info raising DTR\n");
3732 printk(" status: 0x%x, 0x%x\n",
3733 cy_readb(base_addr + (CyMSVR1 << index)),
3734 cy_readb(base_addr + (CyMSVR2 << index)));
1da177e4 3735#endif
02f1175c
JS		 3736 CY_UNLOCK(info, flags);
3737 }
3738 if (clear & TIOCM_DTR) {
3739 CY_LOCK(info, flags);
3740 cy_writeb(base_addr + (CyCAR << index),
3741 (u_char) channel);
3742 if (info->rtsdtr_inv) {
3743 cy_writeb(base_addr + (CyMSVR1 << index),
3744 ~CyRTS);
3745 } else {
3746 cy_writeb(base_addr + (CyMSVR2 << index),
3747 ~CyDTR);
3748 }
1da177e4
LT		 3749
3750#ifdef CY_DEBUG_DTR
02f1175c
JS		 3751 printk("cyc:set_modem_info dropping DTR\n");
3752 printk(" status: 0x%x, 0x%x\n",
3753 cy_readb(base_addr + (CyMSVR1 << index)),
3754 cy_readb(base_addr + (CyMSVR2 << index)));
1da177e4 3755#endif
02f1175c
JS		 3756 CY_UNLOCK(info, flags);
3757 }
3758 } else {
3759 base_addr = cy_card[card].base_addr;
3760
3761 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3762 if (ISZLOADED(cy_card[card])) {
3763 zfw_ctrl = cy_card[card].base_addr +
3764 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3765 board_ctrl = &zfw_ctrl->board_ctrl;
3766 ch_ctrl = zfw_ctrl->ch_ctrl;
3767
3768 if (set & TIOCM_RTS) {
3769 CY_LOCK(info, flags);
3770 cy_writel(&ch_ctrl[channel].rs_control,
3771 cy_readl(&ch_ctrl[channel].
3772 rs_control) | C_RS_RTS);
3773 CY_UNLOCK(info, flags);
3774 }
3775 if (clear & TIOCM_RTS) {
3776 CY_LOCK(info, flags);
3777 cy_writel(&ch_ctrl[channel].rs_control,
3778 cy_readl(&ch_ctrl[channel].
3779 rs_control) & ~C_RS_RTS);
3780 CY_UNLOCK(info, flags);
3781 }
3782 if (set & TIOCM_DTR) {
3783 CY_LOCK(info, flags);
3784 cy_writel(&ch_ctrl[channel].rs_control,
3785 cy_readl(&ch_ctrl[channel].
3786 rs_control) | C_RS_DTR);
1da177e4 3787#ifdef CY_DEBUG_DTR
02f1175c 3788 printk("cyc:set_modem_info raising Z DTR\n");
1da177e4 3789#endif
02f1175c
JS		 3790 CY_UNLOCK(info, flags);
3791 }
3792 if (clear & TIOCM_DTR) {
3793 CY_LOCK(info, flags);
3794 cy_writel(&ch_ctrl[channel].rs_control,
3795 cy_readl(&ch_ctrl[channel].
3796 rs_control) & ~C_RS_DTR);
1da177e4 3797#ifdef CY_DEBUG_DTR
02f1175c 3798 printk("cyc:set_modem_info clearing Z DTR\n");
1da177e4 3799#endif
02f1175c
JS		 3800 CY_UNLOCK(info, flags);
3801 }
3802 } else {
3803 return -ENODEV;
3804 }
3805 CY_LOCK(info, flags);
3806 retval = cyz_issue_cmd(&cy_card[info->card],
3807 channel, C_CM_IOCTLM, 0L);
3808 if (retval != 0) {
3809 printk("cyc:set_modem_info retval on ttyC%d was %x\n",
3810 info->line, retval);
3811 }
3812 CY_UNLOCK(info, flags);
1da177e4 3813 }
02f1175c
JS		 3814 return 0;
3815} /* cy_tiocmset */
1da177e4
LT		 3816
3817/*
3818 * cy_break() --- routine which turns the break handling on or off
3819 */
02f1175c 3820static void cy_break(struct tty_struct *tty, int break_state)
1da177e4 3821{
02f1175c
JS		 3822 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3823 unsigned long flags;
1da177e4 3824
02f1175c
JS		 3825 if (serial_paranoia_check(info, tty->name, "cy_break"))
3826 return;
1da177e4 3827
02f1175c
JS		 3828 CY_LOCK(info, flags);
3829 if (!IS_CYC_Z(cy_card[info->card])) {
3830 /* Let the transmit ISR take care of this (since it
3831 requires stuffing characters into the output stream).
3832 */
3833 if (break_state == -1) {
3834 if (!info->breakon) {
3835 info->breakon = 1;
3836 if (!info->xmit_cnt) {
3837 CY_UNLOCK(info, flags);
3838 start_xmit(info);
3839 CY_LOCK(info, flags);
3840 }
3841 }
3842 } else {
3843 if (!info->breakoff) {
3844 info->breakoff = 1;
3845 if (!info->xmit_cnt) {
3846 CY_UNLOCK(info, flags);
3847 start_xmit(info);
3848 CY_LOCK(info, flags);
3849 }
3850 }
1da177e4 3851 }
1da177e4 3852 } else {
02f1175c
JS		 3853 int retval;
3854
3855 if (break_state == -1) {
3856 retval = cyz_issue_cmd(&cy_card[info->card],
3857 info->line - cy_card[info->card].first_line,
3858 C_CM_SET_BREAK, 0L);
3859 if (retval != 0) {
3860 printk("cyc:cy_break (set) retval on ttyC%d "
3861 "was %x\n", info->line, retval);
3862 }
3863 } else {
3864 retval = cyz_issue_cmd(&cy_card[info->card],
3865 info->line - cy_card[info->card].first_line,
3866 C_CM_CLR_BREAK, 0L);
3867 if (retval != 0) {
3868 printk("cyc:cy_break (clr) retval on ttyC%d "
3869 "was %x\n", info->line, retval);
3870 }
1da177e4 3871 }
1da177e4 3872 }
02f1175c
JS		 3873 CY_UNLOCK(info, flags);
3874} /* cy_break */
1da177e4
LT		 3875
3876static int
02f1175c 3877get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
1da177e4
LT		 3878{
3879
02f1175c
JS		 3880 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3881 return -EFAULT;
3882 info->mon.int_count = 0;
3883 info->mon.char_count = 0;
3884 info->mon.char_max = 0;
3885 info->mon.char_last = 0;
3886 return 0;
3887} /* get_mon_info */
1da177e4 3888
02f1175c 3889static int set_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 3890{
02f1175c
JS		 3891 void __iomem *base_addr;
3892 int card, channel, chip, index;
3893 unsigned long flags;
1da177e4 3894
02f1175c
JS		 3895 card = info->card;
3896 channel = info->line - cy_card[card].first_line;
3897 if (!IS_CYC_Z(cy_card[card])) {
3898 chip = channel >> 2;
3899 channel &= 0x03;
3900 index = cy_card[card].bus_index;
3901 base_addr =
3902 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3903
3904 info->cor3 &= ~CyREC_FIFO;
3905 info->cor3 |= value & CyREC_FIFO;
1da177e4 3906
02f1175c
JS		 3907 CY_LOCK(info, flags);
3908 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3909 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3910 CY_UNLOCK(info, flags);
3911 } else {
096dcfce 3912 /* Nothing to do! */
02f1175c
JS		 3913 }
3914 return 0;
3915} /* set_threshold */
1da177e4
LT		 3916
3917static int
02f1175c 3918get_threshold(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3919{
02f1175c
JS		 3920 void __iomem *base_addr;
3921 int card, channel, chip, index;
3922 unsigned long tmp;
1da177e4 3923
02f1175c
JS		 3924 card = info->card;
3925 channel = info->line - cy_card[card].first_line;
3926 if (!IS_CYC_Z(cy_card[card])) {
3927 chip = channel >> 2;
3928 channel &= 0x03;
3929 index = cy_card[card].bus_index;
3930 base_addr =
3931 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3932
3933 tmp = cy_readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3934 return put_user(tmp, value);
3935 } else {
096dcfce 3936 /* Nothing to do! */
02f1175c
JS		 3937 return 0;
3938 }
3939} /* get_threshold */
1da177e4
LT		 3940
3941static int
02f1175c 3942set_default_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 3943{
02f1175c
JS		 3944 info->default_threshold = value & 0x0f;
3945 return 0;
3946} /* set_default_threshold */
1da177e4
LT		 3947
3948static int
02f1175c 3949get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3950{
02f1175c
JS		 3951 return put_user(info->default_threshold, value);
3952} /* get_default_threshold */
1da177e4 3953
02f1175c 3954static int set_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3955{
02f1175c
JS		 3956 void __iomem *base_addr;
3957 int card, channel, chip, index;
3958 unsigned long flags;
1da177e4 3959
02f1175c
JS		 3960 card = info->card;
3961 channel = info->line - cy_card[card].first_line;
3962 if (!IS_CYC_Z(cy_card[card])) {
3963 chip = channel >> 2;
3964 channel &= 0x03;
3965 index = cy_card[card].bus_index;
3966 base_addr =
3967 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
1da177e4 3968
02f1175c
JS		 3969 CY_LOCK(info, flags);
3970 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3971 CY_UNLOCK(info, flags);
3972 } else {
096dcfce 3973 /* Nothing to do! */
02f1175c
JS		 3974 }
3975 return 0;
3976} /* set_timeout */
1da177e4 3977
02f1175c 3978static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3979{
02f1175c
JS		 3980 void __iomem *base_addr;
3981 int card, channel, chip, index;
3982 unsigned long tmp;
1da177e4 3983
02f1175c
JS		 3984 card = info->card;
3985 channel = info->line - cy_card[card].first_line;
3986 if (!IS_CYC_Z(cy_card[card])) {
3987 chip = channel >> 2;
3988 channel &= 0x03;
3989 index = cy_card[card].bus_index;
3990 base_addr =
3991 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3992
3993 tmp = cy_readb(base_addr + (CyRTPR << index));
3994 return put_user(tmp, value);
3995 } else {
096dcfce 3996 /* Nothing to do! */
02f1175c
JS		 3997 return 0;
3998 }
3999} /* get_timeout */
1da177e4 4000
02f1175c 4001static int set_default_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 4002{
02f1175c
JS		 4003 info->default_timeout = value & 0xff;
4004 return 0;
4005} /* set_default_timeout */
1da177e4
LT		 4006
4007static int
02f1175c 4008get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
1da177e4 4009{
02f1175c
JS		 4010 return put_user(info->default_timeout, value);
4011} /* get_default_timeout */
1da177e4
LT		 4012
4013/*
4014 * This routine allows the tty driver to implement device-
4015 * specific ioctl's. If the ioctl number passed in cmd is
4016 * not recognized by the driver, it should return ENOIOCTLCMD.
4017 */
4018static int
02f1175c
JS		 4019cy_ioctl(struct tty_struct *tty, struct file *file,
4020 unsigned int cmd, unsigned long arg)
1da177e4 4021{
02f1175c
JS		 4022 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4023 struct cyclades_icount cprev, cnow; /* kernel counter temps */
4024 struct serial_icounter_struct __user *p_cuser; /* user space */
4025 int ret_val = 0;
4026 unsigned long flags;
4027 void __user *argp = (void __user *)arg;
4028
4029 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
4030 return -ENODEV;
1da177e4
LT		 4031
4032#ifdef CY_DEBUG_OTHER
02f1175c 4033 printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", info->line, cmd, arg); /* */
1da177e4
LT		 4034#endif
4035
02f1175c
JS		 4036 switch (cmd) {
4037 case CYGETMON:
4038 ret_val = get_mon_info(info, argp);
4039 break;
4040 case CYGETTHRESH:
4041 ret_val = get_threshold(info, argp);
4042 break;
4043 case CYSETTHRESH:
4044 ret_val = set_threshold(info, arg);
4045 break;
4046 case CYGETDEFTHRESH:
4047 ret_val = get_default_threshold(info, argp);
4048 break;
4049 case CYSETDEFTHRESH:
4050 ret_val = set_default_threshold(info, arg);
4051 break;
4052 case CYGETTIMEOUT:
4053 ret_val = get_timeout(info, argp);
4054 break;
4055 case CYSETTIMEOUT:
4056 ret_val = set_timeout(info, arg);
4057 break;
4058 case CYGETDEFTIMEOUT:
4059 ret_val = get_default_timeout(info, argp);
4060 break;
4061 case CYSETDEFTIMEOUT:
4062 ret_val = set_default_timeout(info, arg);
4063 break;
1da177e4 4064 case CYSETRFLOW:
02f1175c
JS		 4065 info->rflow = (int)arg;
4066 ret_val = 0;
4067 break;
1da177e4 4068 case CYGETRFLOW:
02f1175c
JS		 4069 ret_val = info->rflow;
4070 break;
1da177e4 4071 case CYSETRTSDTR_INV:
02f1175c
JS		 4072 info->rtsdtr_inv = (int)arg;
4073 ret_val = 0;
4074 break;
1da177e4 4075 case CYGETRTSDTR_INV:
02f1175c
JS		 4076 ret_val = info->rtsdtr_inv;
4077 break;
1da177e4 4078 case CYGETCARDINFO:
02f1175c
JS		 4079 if (copy_to_user(argp, &cy_card[info->card],
4080 sizeof(struct cyclades_card))) {
4081 ret_val = -EFAULT;
4082 break;
4083 }
4084 ret_val = 0;
1da177e4 4085 break;
1da177e4 4086 case CYGETCD1400VER:
02f1175c
JS		 4087 ret_val = info->chip_rev;
4088 break;
1da177e4
LT		 4089#ifndef CONFIG_CYZ_INTR
4090 case CYZSETPOLLCYCLE:
02f1175c
JS		 4091 cyz_polling_cycle = (arg * HZ) / 1000;
4092 ret_val = 0;
4093 break;
1da177e4 4094 case CYZGETPOLLCYCLE:
02f1175c
JS		 4095 ret_val = (cyz_polling_cycle * 1000) / HZ;
4096 break;
4097#endif /* CONFIG_CYZ_INTR */
1da177e4 4098 case CYSETWAIT:
02f1175c
JS		 4099 info->closing_wait = (unsigned short)arg *HZ / 100;
4100 ret_val = 0;
4101 break;
1da177e4 4102 case CYGETWAIT:
02f1175c
JS		 4103 ret_val = info->closing_wait / (HZ / 100);
4104 break;
4105 case TIOCGSERIAL:
4106 ret_val = get_serial_info(info, argp);
4107 break;
4108 case TIOCSSERIAL:
4109 ret_val = set_serial_info(info, argp);
4110 break;
4111 case TIOCSERGETLSR: /* Get line status register */
4112 ret_val = get_lsr_info(info, argp);
4113 break;
4114 /*
4115 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4116 * - mask passed in arg for lines of interest
4117 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4118 * Caller should use TIOCGICOUNT to see which one it was
4119 */
1da177e4 4120 case TIOCMIWAIT:
1da177e4 4121 CY_LOCK(info, flags);
02f1175c
JS		 4122 /* note the counters on entry */
4123 cprev = info->icount;
1da177e4 4124 CY_UNLOCK(info, flags);
02f1175c
JS		 4125 while (1) {
4126 interruptible_sleep_on(&info->delta_msr_wait);
4127 /* see if a signal did it */
4128 if (signal_pending(current)) {
4129 return -ERESTARTSYS;
4130 }
1da177e4 4131
02f1175c
JS		 4132 CY_LOCK(info, flags);
4133 cnow = info->icount; /* atomic copy */
4134 CY_UNLOCK(info, flags);
4135
4136 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
4137 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
4138 return -EIO; /* no change => error */
4139 }
4140 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4141 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4142 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4143 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
4144 return 0;
4145 }
4146 cprev = cnow;
1da177e4 4147 }
02f1175c 4148 /* NOTREACHED */
1da177e4 4149
02f1175c
JS		 4150 /*
4151 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4152 * Return: write counters to the user passed counter struct
4153 * NB: both 1->0 and 0->1 transitions are counted except for
4154 * RI where only 0->1 is counted.
4155 */
1da177e4 4156 case TIOCGICOUNT:
02f1175c
JS		 4157 CY_LOCK(info, flags);
4158 cnow = info->icount;
4159 CY_UNLOCK(info, flags);
4160 p_cuser = argp;
4161 ret_val = put_user(cnow.cts, &p_cuser->cts);
4162 if (ret_val)
4163 return ret_val;
4164 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4165 if (ret_val)
4166 return ret_val;
4167 ret_val = put_user(cnow.rng, &p_cuser->rng);
4168 if (ret_val)
4169 return ret_val;
4170 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4171 if (ret_val)
4172 return ret_val;
4173 ret_val = put_user(cnow.rx, &p_cuser->rx);
4174 if (ret_val)
4175 return ret_val;
4176 ret_val = put_user(cnow.tx, &p_cuser->tx);
4177 if (ret_val)
4178 return ret_val;
4179 ret_val = put_user(cnow.frame, &p_cuser->frame);
4180 if (ret_val)
4181 return ret_val;
4182 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4183 if (ret_val)
4184 return ret_val;
4185 ret_val = put_user(cnow.parity, &p_cuser->parity);
4186 if (ret_val)
4187 return ret_val;
4188 ret_val = put_user(cnow.brk, &p_cuser->brk);
4189 if (ret_val)
4190 return ret_val;
4191 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4192 if (ret_val)
4193 return ret_val;
4194 ret_val = 0;
4195 break;
4196 default:
4197 ret_val = -ENOIOCTLCMD;
4198 }
1da177e4
LT		 4199
4200#ifdef CY_DEBUG_OTHER
02f1175c 4201 printk(" cyc:cy_ioctl done\n");
1da177e4
LT		 4202#endif
4203
02f1175c
JS		 4204 return ret_val;
4205} /* cy_ioctl */
1da177e4
LT		 4206
4207/*
4208 * This routine allows the tty driver to be notified when
4209 * device's termios settings have changed. Note that a
4210 * well-designed tty driver should be prepared to accept the case
4211 * where old == NULL, and try to do something rational.
4212 */
02f1175c 4213static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 4214{
02f1175c 4215 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1da177e4
LT		 4216
4217#ifdef CY_DEBUG_OTHER
02f1175c 4218 printk("cyc:cy_set_termios ttyC%d\n", info->line);
1da177e4
LT		 4219#endif
4220
02f1175c
JS		 4221 if (tty->termios->c_cflag == old_termios->c_cflag &&
4222 (tty->termios->c_iflag & (IXON | IXANY)) ==
4223 (old_termios->c_iflag & (IXON | IXANY)))
4224 return;
4225 set_line_char(info);
4226
4227 if ((old_termios->c_cflag & CRTSCTS) &&
4228 !(tty->termios->c_cflag & CRTSCTS)) {
4229 tty->hw_stopped = 0;
4230 cy_start(tty);
4231 }
1da177e4 4232#if 0
02f1175c
JS		 4233 /*
4234 * No need to wake up processes in open wait, since they
4235 * sample the CLOCAL flag once, and don't recheck it.
4236 * XXX It's not clear whether the current behavior is correct
4237 * or not. Hence, this may change.....
4238 */
4239 if (!(old_termios->c_cflag & CLOCAL) &&
4240 (tty->termios->c_cflag & CLOCAL))
4241 wake_up_interruptible(&info->open_wait);
1da177e4 4242#endif
02f1175c 4243} /* cy_set_termios */
1da177e4
LT		 4244
4245/* This function is used to send a high-priority XON/XOFF character to
4246 the device.
4247*/
02f1175c 4248static void cy_send_xchar(struct tty_struct *tty, char ch)
1da177e4 4249{
02f1175c 4250 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1da177e4
LT		 4251 int card, channel;
4252
02f1175c 4253 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
1da177e4
LT		 4254 return;
4255
02f1175c 4256 info->x_char = ch;
1da177e4
LT		 4257
4258 if (ch)
02f1175c 4259 cy_start(tty);
1da177e4
LT		 4260
4261 card = info->card;
4262 channel = info->line - cy_card[card].first_line;
4263
02f1175c
JS		 4264 if (IS_CYC_Z(cy_card[card])) {
4265 if (ch == STOP_CHAR(tty))
4266 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXOFF,
4267 0L);
4268 else if (ch == START_CHAR(tty))
4269 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXON,
4270 0L);
1da177e4
LT		 4271 }
4272}
4273
4274/* This routine is called by the upper-layer tty layer to signal
4275 that incoming characters should be throttled because the input
4276 buffers are close to full.
4277 */
02f1175c 4278static void cy_throttle(struct tty_struct *tty)
1da177e4 4279{
02f1175c
JS		 4280 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4281 unsigned long flags;
4282 void __iomem *base_addr;
4283 int card, chip, channel, index;
1da177e4
LT		 4284
4285#ifdef CY_DEBUG_THROTTLE
02f1175c 4286 char buf[64];
1da177e4 4287
02f1175c
JS		 4288 printk("cyc:throttle %s: %d....ttyC%d\n", tty_name(tty, buf),
4289 tty->ldisc.chars_in_buffer(tty), info->line);
1da177e4
LT		 4290#endif
4291
02f1175c
JS		 4292 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4293 return;
4294 }
4295
4296 card = info->card;
4297
4298 if (I_IXOFF(tty)) {
4299 if (!IS_CYC_Z(cy_card[card]))
4300 cy_send_xchar(tty, STOP_CHAR(tty));
4301 else
4302 info->throttle = 1;
4303 }
1da177e4 4304
02f1175c
JS		 4305 if (tty->termios->c_cflag & CRTSCTS) {
4306 channel = info->line - cy_card[card].first_line;
4307 if (!IS_CYC_Z(cy_card[card])) {
4308 chip = channel >> 2;
4309 channel &= 0x03;
4310 index = cy_card[card].bus_index;
4311 base_addr = cy_card[card].base_addr +
4312 (cy_chip_offset[chip] << index);
4313
4314 CY_LOCK(info, flags);
4315 cy_writeb(base_addr + (CyCAR << index),
4316 (u_char) channel);
4317 if (info->rtsdtr_inv) {
4318 cy_writeb(base_addr + (CyMSVR2 << index),
4319 ~CyDTR);
4320 } else {
4321 cy_writeb(base_addr + (CyMSVR1 << index),
4322 ~CyRTS);
4323 }
4324 CY_UNLOCK(info, flags);
4325 } else {
4326 info->throttle = 1;
4327 }
4328 }
02f1175c 4329} /* cy_throttle */
1da177e4
LT		 4330
4331/*
4332 * This routine notifies the tty driver that it should signal
4333 * that characters can now be sent to the tty without fear of
4334 * overrunning the input buffers of the line disciplines.
4335 */
02f1175c 4336static void cy_unthrottle(struct tty_struct *tty)
1da177e4 4337{
02f1175c
JS		 4338 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4339 unsigned long flags;
4340 void __iomem *base_addr;
4341 int card, chip, channel, index;
1da177e4
LT		 4342
4343#ifdef CY_DEBUG_THROTTLE
02f1175c
JS		 4344 char buf[64];
4345
4346 printk("cyc:unthrottle %s: %d....ttyC%d\n", tty_name(tty, buf),
4347 tty->ldisc.chars_in_buffer(tty), info->line);
1da177e4
LT		 4348#endif
4349
02f1175c
JS		 4350 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4351 return;
4352 }
1da177e4 4353
02f1175c
JS		 4354 if (I_IXOFF(tty)) {
4355 if (info->x_char)
4356 info->x_char = 0;
4357 else
4358 cy_send_xchar(tty, START_CHAR(tty));
1da177e4 4359 }
1da177e4 4360
02f1175c
JS		 4361 if (tty->termios->c_cflag & CRTSCTS) {
4362 card = info->card;
4363 channel = info->line - cy_card[card].first_line;
4364 if (!IS_CYC_Z(cy_card[card])) {
4365 chip = channel >> 2;
4366 channel &= 0x03;
4367 index = cy_card[card].bus_index;
4368 base_addr = cy_card[card].base_addr +
4369 (cy_chip_offset[chip] << index);
4370
4371 CY_LOCK(info, flags);
4372 cy_writeb(base_addr + (CyCAR << index),
4373 (u_char) channel);
4374 if (info->rtsdtr_inv) {
4375 cy_writeb(base_addr + (CyMSVR2 << index),
4376 CyDTR);
4377 } else {
4378 cy_writeb(base_addr + (CyMSVR1 << index),
4379 CyRTS);
4380 }
4381 CY_UNLOCK(info, flags);
4382 } else {
4383 info->throttle = 0;
4384 }
4385 }
02f1175c 4386} /* cy_unthrottle */
1da177e4
LT		 4387
4388/* cy_start and cy_stop provide software output flow control as a
4389 function of XON/XOFF, software CTS, and other such stuff.
4390*/
02f1175c 4391static void cy_stop(struct tty_struct *tty)
1da177e4 4392{
02f1175c
JS		 4393 struct cyclades_card *cinfo;
4394 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4395 void __iomem *base_addr;
4396 int chip, channel, index;
4397 unsigned long flags;
1da177e4
LT		 4398
4399#ifdef CY_DEBUG_OTHER
02f1175c 4400 printk("cyc:cy_stop ttyC%d\n", info->line); /* */
1da177e4
LT		 4401#endif
4402
02f1175c
JS		 4403 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4404 return;
1da177e4 4405
02f1175c
JS		 4406 cinfo = &cy_card[info->card];
4407 channel = info->line - cinfo->first_line;
4408 if (!IS_CYC_Z(*cinfo)) {
4409 index = cinfo->bus_index;
4410 chip = channel >> 2;
4411 channel &= 0x03;
4412 base_addr = cy_card[info->card].base_addr +
4413 (cy_chip_offset[chip] << index);
1da177e4 4414
02f1175c
JS		 4415 CY_LOCK(info, flags);
4416 cy_writeb(base_addr + (CyCAR << index),
4417 (u_char)(channel & 0x0003)); /* index channel */
4418 cy_writeb(base_addr + (CySRER << index),
4419 cy_readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4420 CY_UNLOCK(info, flags);
4421 } else {
096dcfce 4422 /* Nothing to do! */
02f1175c 4423 }
02f1175c 4424} /* cy_stop */
1da177e4 4425
02f1175c 4426static void cy_start(struct tty_struct *tty)
1da177e4 4427{
02f1175c
JS		 4428 struct cyclades_card *cinfo;
4429 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4430 void __iomem *base_addr;
4431 int chip, channel, index;
4432 unsigned long flags;
1da177e4
LT		 4433
4434#ifdef CY_DEBUG_OTHER
02f1175c 4435 printk("cyc:cy_start ttyC%d\n", info->line); /* */
1da177e4
LT		 4436#endif
4437
02f1175c
JS		 4438 if (serial_paranoia_check(info, tty->name, "cy_start"))
4439 return;
1da177e4 4440
02f1175c
JS		 4441 cinfo = &cy_card[info->card];
4442 channel = info->line - cinfo->first_line;
4443 index = cinfo->bus_index;
4444 if (!IS_CYC_Z(*cinfo)) {
4445 chip = channel >> 2;
4446 channel &= 0x03;
4447 base_addr = cy_card[info->card].base_addr +
4448 (cy_chip_offset[chip] << index);
1da177e4 4449
02f1175c
JS		 4450 CY_LOCK(info, flags);
4451 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4452 cy_writeb(base_addr + (CySRER << index),
4453 cy_readb(base_addr + (CySRER << index)) | CyTxRdy);
4454 CY_UNLOCK(info, flags);
4455 } else {
096dcfce 4456 /* Nothing to do! */
02f1175c 4457 }
02f1175c 4458} /* cy_start */
1da177e4 4459
02f1175c 4460static void cy_flush_buffer(struct tty_struct *tty)
1da177e4 4461{
02f1175c
JS		 4462 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4463 int card, channel, retval;
4464 unsigned long flags;
4465
1da177e4 4466#ifdef CY_DEBUG_IO
02f1175c 4467 printk("cyc:cy_flush_buffer ttyC%d\n", info->line); /* */
1da177e4
LT		 4468#endif
4469
02f1175c
JS		 4470 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4471 return;
1da177e4 4472
02f1175c
JS		 4473 card = info->card;
4474 channel = (info->line) - (cy_card[card].first_line);
1da177e4 4475
1da177e4 4476 CY_LOCK(info, flags);
02f1175c 4477 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1da177e4 4478 CY_UNLOCK(info, flags);
1da177e4 4479
02f1175c
JS		 4480 if (IS_CYC_Z(cy_card[card])) { /* If it is a Z card, flush the on-board
4481 buffers as well */
4482 CY_LOCK(info, flags);
4483 retval =
4484 cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
4485 if (retval != 0) {
4486 printk("cyc: flush_buffer retval on ttyC%d was %x\n",
4487 info->line, retval);
4488 }
4489 CY_UNLOCK(info, flags);
4490 }
4491 tty_wakeup(tty);
02f1175c 4492} /* cy_flush_buffer */
1da177e4
LT		 4493
4494/*
4495 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4496 */
02f1175c 4497static void cy_hangup(struct tty_struct *tty)
1da177e4 4498{
02f1175c
JS		 4499 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4500
1da177e4 4501#ifdef CY_DEBUG_OTHER
02f1175c 4502 printk("cyc:cy_hangup ttyC%d\n", info->line); /* */
1da177e4
LT		 4503#endif
4504
02f1175c
JS		 4505 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4506 return;
1da177e4 4507
02f1175c
JS		 4508 cy_flush_buffer(tty);
4509 shutdown(info);
4510 info->event = 0;
4511 info->count = 0;
1da177e4 4512#ifdef CY_DEBUG_COUNT
02f1175c 4513 printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
1da177e4 4514#endif
02f1175c
JS		 4515 info->tty = NULL;
4516 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4517 wake_up_interruptible(&info->open_wait);
4518} /* cy_hangup */
1da177e4
LT		 4519
4520/*
4521 * ---------------------------------------------------------------------
4522 * cy_init() and friends
4523 *
4524 * cy_init() is called at boot-time to initialize the serial driver.
4525 * ---------------------------------------------------------------------
4526 */
4527
4528/* initialize chips on Cyclom-Y card -- return number of valid
4529 chips (which is number of ports/4) */
4530static unsigned short __init
02f1175c 4531cyy_init_card(void __iomem * true_base_addr, int index)
1da177e4 4532{
02f1175c
JS		 4533 unsigned int chip_number;
4534 void __iomem *base_addr;
4535
4536 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4537 /* Cy_HwReset is 0x1400 */
4538 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4539 /* Cy_ClrIntr is 0x1800 */
4540 udelay(500L);
4541
4542 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4543 base_addr =
4544 true_base_addr + (cy_chip_offset[chip_number] << index);
4545 mdelay(1);
4546 if (cy_readb(base_addr + (CyCCR << index)) != 0x00) {
4547 /*************
4548 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4549 chip_number, (unsigned long)base_addr);
4550 *************/
4551 return chip_number;
4552 }
4553
4554 cy_writeb(base_addr + (CyGFRCR << index), 0);
4555 udelay(10L);
4556
4557 /* The Cyclom-16Y does not decode address bit 9 and therefore
4558 cannot distinguish between references to chip 0 and a non-
4559 existent chip 4. If the preceding clearing of the supposed
4560 chip 4 GFRCR register appears at chip 0, there is no chip 4
4561 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4562 */
4563 if (chip_number == 4 && cy_readb(true_base_addr +
4564 (cy_chip_offset[0] << index) +
4565 (CyGFRCR << index)) == 0) {
4566 return chip_number;
4567 }
4568
4569 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4570 mdelay(1);
4571
4572 if (cy_readb(base_addr + (CyGFRCR << index)) == 0x00) {
4573 /*
4574 printk(" chip #%d at %#6lx is not responding ",
4575 chip_number, (unsigned long)base_addr);
4576 printk("(GFRCR stayed 0)\n",
4577 */
4578 return chip_number;
4579 }
4580 if ((0xf0 & (cy_readb(base_addr + (CyGFRCR << index)))) !=
4581 0x40) {
4582 /*
4583 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4584 "%#2x)\n",
4585 chip_number, (unsigned long)base_addr,
4586 base_addr[CyGFRCR<<index]);
4587 */
4588 return chip_number;
4589 }
4590 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4591 if (cy_readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4592 /* It is a CD1400 rev. J or later */
4593 /* Impossible to reach 5ms with this chip.
4594 Changed to 2ms instead (f = 500 Hz). */
4595 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4596 } else {
4597 /* f = 200 Hz */
4598 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4599 }
1da177e4 4600
02f1175c
JS		 4601 /*
4602 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4603 chip_number, (unsigned long)base_addr,
4604 cy_readb(base_addr+(CyGFRCR<<index)));
4605 */
4606 }
4607 return chip_number;
4608} /* cyy_init_card */
1da177e4
LT		 4609
4610/*
4611 * ---------------------------------------------------------------------
4612 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4613 * sets global variables and return the number of ISA boards found.
4614 * ---------------------------------------------------------------------
4615 */
02f1175c 4616static int __init cy_detect_isa(void)
1da177e4
LT		 4617{
4618#ifdef CONFIG_ISA
02f1175c
JS		 4619 unsigned short cy_isa_irq, nboard;
4620 void __iomem *cy_isa_address;
4621 unsigned short i, j, cy_isa_nchan;
1da177e4 4622#ifdef MODULE
02f1175c 4623 int isparam = 0;
1da177e4
LT		 4624#endif
4625
02f1175c 4626 nboard = 0;
1da177e4
LT		 4627
4628#ifdef MODULE
4629 /* Check for module parameters */
02f1175c
JS		 4630 for (i = 0; i < NR_CARDS; i++) {
4631 if (maddr[i] || i) {
4632 isparam = 1;
4633 cy_isa_addresses[i] = maddr[i];
4634 }
4635 if (!maddr[i])
4636 break;
1da177e4
LT		 4637 }
4638#endif
4639
02f1175c
JS		 4640 /* scan the address table probing for Cyclom-Y/ISA boards */
4641 for (i = 0; i < NR_ISA_ADDRS; i++) {
4642 unsigned int isa_address = cy_isa_addresses[i];
4643 if (isa_address == 0x0000) {
096dcfce 4644 return nboard;
02f1175c 4645 }
1da177e4 4646
02f1175c 4647 /* probe for CD1400... */
1da177e4 4648 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
02f1175c
JS		 4649 cy_isa_nchan = CyPORTS_PER_CHIP *
4650 cyy_init_card(cy_isa_address, 0);
4651 if (cy_isa_nchan == 0) {
4652 continue;
4653 }
1da177e4
LT		 4654#ifdef MODULE
4655 if (isparam && irq[i])
02f1175c 4656 cy_isa_irq = irq[i];
1da177e4
LT		 4657 else
4658#endif
02f1175c
JS		 4659 /* find out the board's irq by probing */
4660 cy_isa_irq = detect_isa_irq(cy_isa_address);
4661 if (cy_isa_irq == 0) {
4662 printk("Cyclom-Y/ISA found at 0x%lx ",
4663 (unsigned long)cy_isa_address);
4664 printk("but the IRQ could not be detected.\n");
4665 continue;
4666 }
4667
4668 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4669 printk("Cyclom-Y/ISA found at 0x%lx ",
4670 (unsigned long)cy_isa_address);
4671 printk("but no more channels are available.\n");
4672 printk("Change NR_PORTS in cyclades.c and recompile "
4673 "kernel.\n");
096dcfce 4674 return nboard;
02f1175c
JS		 4675 }
4676 /* fill the next cy_card structure available */
4677 for (j = 0; j < NR_CARDS; j++) {
4678 if (cy_card[j].base_addr == 0)
4679 break;
4680 }
4681 if (j == NR_CARDS) { /* no more cy_cards available */
4682 printk("Cyclom-Y/ISA found at 0x%lx ",
4683 (unsigned long)cy_isa_address);
4684 printk("but no more cards can be used .\n");
4685 printk("Change NR_CARDS in cyclades.c and recompile "
4686 "kernel.\n");
096dcfce 4687 return nboard;
02f1175c
JS		 4688 }
4689
4690 /* allocate IRQ */
4691 if (request_irq(cy_isa_irq, cyy_interrupt,
4692 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4693 printk("Cyclom-Y/ISA found at 0x%lx ",
4694 (unsigned long)cy_isa_address);
4695 printk("but could not allocate IRQ#%d.\n", cy_isa_irq);
096dcfce 4696 return nboard;
02f1175c
JS		 4697 }
4698
4699 /* set cy_card */
4700 cy_card[j].base_addr = cy_isa_address;
4701 cy_card[j].ctl_addr = NULL;
4702 cy_card[j].irq = (int)cy_isa_irq;
4703 cy_card[j].bus_index = 0;
4704 cy_card[j].first_line = cy_next_channel;
4705 cy_card[j].num_chips = cy_isa_nchan / 4;
4706 nboard++;
4707
4708 /* print message */
4709 printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
4710 j + 1, (unsigned long)cy_isa_address,
4711 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4712 cy_isa_irq);
4713 printk("%d channels starting from port %d.\n",
4714 cy_isa_nchan, cy_next_channel);
4715 cy_next_channel += cy_isa_nchan;
4716 }
096dcfce 4717 return nboard;
1da177e4 4718#else
096dcfce 4719 return 0;
02f1175c
JS		 4720#endif /* CONFIG_ISA */
4721} /* cy_detect_isa */
1da177e4 4722
1a86b5e3 4723static void plx_init(void __iomem * addr, __u32 initctl)
1da177e4 4724{
02f1175c
JS		 4725 /* Reset PLX */
4726 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x40000000);
4727 udelay(100L);
4728 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x40000000);
4729
4730 /* Reload Config. Registers from EEPROM */
4731 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x20000000);
4732 udelay(100L);
4733 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x20000000);
1da177e4
LT		 4734}
4735
4736/*
4737 * ---------------------------------------------------------------------
4738 * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
4739 * sets global variables and return the number of PCI boards found.
4740 * ---------------------------------------------------------------------
4741 */
02f1175c 4742static int __init cy_detect_pci(void)
1da177e4
LT		 4743{
4744#ifdef CONFIG_PCI
4745
02f1175c
JS		 4746 struct pci_dev *pdev = NULL;
4747 unsigned char cyy_rev_id;
4748 unsigned char cy_pci_irq = 0;
1a86b5e3 4749 __u32 cy_pci_phys0, cy_pci_phys2;
02f1175c
JS		 4750 void __iomem *cy_pci_addr0, *cy_pci_addr2;
4751 unsigned short i, j, cy_pci_nchan, plx_ver;
4752 unsigned short device_id, dev_index = 0;
1a86b5e3
KK		 4753 __u32 mailbox;
4754 __u32 ZeIndex = 0;
02f1175c 4755 void __iomem *Ze_addr0[NR_CARDS], *Ze_addr2[NR_CARDS];
1a86b5e3 4756 __u32 Ze_phys0[NR_CARDS], Ze_phys2[NR_CARDS];
02f1175c
JS		 4757 unsigned char Ze_irq[NR_CARDS];
4758 struct pci_dev *Ze_pdev[NR_CARDS];
4759
4760 for (i = 0; i < NR_CARDS; i++) {
4761 /* look for a Cyclades card by vendor and device id */
893de2df 4762 while ((device_id = cy_pci_dev_id[dev_index].device) != 0) {
02f1175c
JS		 4763 if ((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
4764 device_id, pdev)) == NULL) {
4765 dev_index++; /* try next device id */
4766 } else {
4767 break; /* found a board */
4768 }
4769 }
1da177e4
LT		 4770
4771 if (device_id == 0)
02f1175c 4772 break;
1da177e4
LT		 4773
4774 if (pci_enable_device(pdev))
02f1175c 4775 continue;
1da177e4 4776
02f1175c 4777 /* read PCI configuration area */
1da177e4
LT		 4778 cy_pci_irq = pdev->irq;
4779 cy_pci_phys0 = pci_resource_start(pdev, 0);
4780 cy_pci_phys2 = pci_resource_start(pdev, 2);
4781 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4782
4783 device_id &= ~PCI_DEVICE_ID_MASK;
4784
02f1175c
JS		 4785 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4786 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
1da177e4 4787#ifdef CY_PCI_DEBUG
02f1175c
JS		 4788 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4789 pdev->bus->number, pdev->devfn);
4790 printk("rev_id=%d) IRQ%d\n",
4791 cyy_rev_id, (int)cy_pci_irq);
4792 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
4793 "ctladdr=0x%lx\n",
4794 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
1da177e4
LT		 4795#endif
4796
02f1175c
JS		 4797 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4798 printk(" Warning: PCI I/O bit incorrectly "
4799 "set. Ignoring it...\n");
4800 pdev->resource[2].flags &= ~IORESOURCE_IO;
4801 }
1da177e4 4802
02f1175c
JS		 4803 /* Although we don't use this I/O region, we should
4804 request it from the kernel anyway, to avoid problems
4805 with other drivers accessing it. */
4806 if (pci_request_regions(pdev, "Cyclom-Y") != 0) {
4807 printk(KERN_ERR "cyclades: failed to reserve "
4808 "PCI resources\n");
4809 continue;
4810 }
1da177e4 4811#if defined(__alpha__)
02f1175c
JS		 4812 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4813 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4814 pdev->bus->number, pdev->devfn);
4815 printk("rev_id=%d) IRQ%d\n",
4816 cyy_rev_id, (int)cy_pci_irq);
4817 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
4818 "ctladdr=0x%lx\n",
4819 (ulong)cy_pci_phys2,
4820 (ulong)cy_pci_phys0);
4821 printk("Cyclom-Y/PCI not supported for low "
4822 "addresses in Alpha systems.\n");
4823 i--;
4824 continue;
4825 }
1da177e4 4826#endif
02f1175c
JS		 4827 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Yctl);
4828 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ywin);
1da177e4
LT		 4829
4830#ifdef CY_PCI_DEBUG
02f1175c
JS		 4831 printk("Cyclom-Y/PCI: relocate winaddr=0x%lx "
4832 "ctladdr=0x%lx\n",
4833 (u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
1da177e4 4834#endif
02f1175c
JS		 4835 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4836 cyy_init_card(cy_pci_addr2, 1));
4837 if (cy_pci_nchan == 0) {
4838 printk("Cyclom-Y PCI host card with ");
4839 printk("no Serial-Modules at 0x%lx.\n",
4840 (ulong) cy_pci_phys2);
4841 i--;
4842 continue;
4843 }
4844 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4845 printk("Cyclom-Y/PCI found at 0x%lx ",
4846 (ulong) cy_pci_phys2);
4847 printk("but no channels are available.\n");
4848 printk("Change NR_PORTS in cyclades.c and "
4849 "recompile kernel.\n");
096dcfce 4850 return i;
02f1175c
JS		 4851 }
4852 /* fill the next cy_card structure available */
4853 for (j = 0; j < NR_CARDS; j++) {
4854 if (cy_card[j].base_addr == 0)
4855 break;
4856 }
4857 if (j == NR_CARDS) { /* no more cy_cards available */
4858 printk("Cyclom-Y/PCI found at 0x%lx ",
4859 (ulong) cy_pci_phys2);
4860 printk("but no more cards can be used.\n");
4861 printk("Change NR_CARDS in cyclades.c and "
4862 "recompile kernel.\n");
096dcfce 4863 return i;
02f1175c 4864 }
1da177e4 4865
02f1175c
JS		 4866 /* allocate IRQ */
4867 if (request_irq(cy_pci_irq, cyy_interrupt,
4868 IRQF_SHARED, "Cyclom-Y", &cy_card[j])) {
4869 printk("Cyclom-Y/PCI found at 0x%lx ",
4870 (ulong) cy_pci_phys2);
4871 printk("but could not allocate IRQ%d.\n",
4872 cy_pci_irq);
096dcfce 4873 return i;
02f1175c
JS		 4874 }
4875
4876 /* set cy_card */
4877 cy_card[j].base_phys = (ulong) cy_pci_phys2;
4878 cy_card[j].ctl_phys = (ulong) cy_pci_phys0;
4879 cy_card[j].base_addr = cy_pci_addr2;
4880 cy_card[j].ctl_addr = cy_pci_addr0;
4881 cy_card[j].irq = (int)cy_pci_irq;
4882 cy_card[j].bus_index = 1;
4883 cy_card[j].first_line = cy_next_channel;
4884 cy_card[j].num_chips = cy_pci_nchan / 4;
4885 cy_card[j].pdev = pdev;
4886
4887 /* enable interrupts in the PCI interface */
4888 plx_ver = cy_readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
4889 switch (plx_ver) {
4890 case PLX_9050:
4891
4892 cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
4893 break;
4894
4895 case PLX_9060:
4896 case PLX_9080:
4897 default: /* Old boards, use PLX_9060 */
4898
4899 plx_init(cy_pci_addr0, 0x6c);
4900 /* For some yet unknown reason, once the PLX9060 reloads
4901 the EEPROM, the IRQ is lost and, thus, we have to
4902 re-write it to the PCI config. registers.
4903 This will remain here until we find a permanent
4904 fix. */
4905 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4906 cy_pci_irq);
4907
4908 cy_writew(cy_pci_addr0 + 0x68,
4909 cy_readw(cy_pci_addr0 +
4910 0x68) | 0x0900);
4911 break;
4912 }
4913
4914 /* print message */
4915 printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4916 j + 1, (ulong)cy_pci_phys2,
4917 (ulong) (cy_pci_phys2 + CyPCI_Ywin - 1),
4918 (int)cy_pci_irq);
4919 printk("%d channels starting from port %d.\n",
4920 cy_pci_nchan, cy_next_channel);
4921
4922 cy_next_channel += cy_pci_nchan;
4923 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4924 /* print message */
4925 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4926 pdev->bus->number, pdev->devfn);
4927 printk("rev_id=%d) IRQ%d\n",
4928 cyy_rev_id, (int)cy_pci_irq);
4929 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
4930 "ctladdr=0x%lx\n",
4931 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4932 printk("Cyclades-Z/PCI not supported for low "
4933 "addresses\n");
4934 break;
4935 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
1da177e4 4936#ifdef CY_PCI_DEBUG
02f1175c
JS		 4937 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4938 pdev->bus->number, pdev->devfn);
4939 printk("rev_id=%d) IRQ%d\n",
4940 cyy_rev_id, (int)cy_pci_irq);
4941 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
4942 "ctladdr=0x%lx\n",
4943 (ulong) cy_pci_phys2, (ulong) cy_pci_phys0);
1da177e4 4944#endif
02f1175c
JS		 4945 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Zctl);
4946
4947 /* Disable interrupts on the PLX before resetting it */
4948 cy_writew(cy_pci_addr0 + 0x68,
4949 cy_readw(cy_pci_addr0 + 0x68) & ~0x0900);
4950
4951 plx_init(cy_pci_addr0, 0x6c);
4952 /* For some yet unknown reason, once the PLX9060 reloads
4953 the EEPROM, the IRQ is lost and, thus, we have to
4954 re-write it to the PCI config. registers.
4955 This will remain here until we find a permanent
4956 fix. */
4957 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4958 cy_pci_irq);
4959
4960 mailbox =
1a86b5e3 4961 (__u32)cy_readl(&((struct RUNTIME_9060 __iomem *)
02f1175c
JS		 4962 cy_pci_addr0)->mail_box_0);
4963
4964 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4965 printk(" Warning: PCI I/O bit incorrectly "
4966 "set. Ignoring it...\n");
4967 pdev->resource[2].flags &= ~IORESOURCE_IO;
4968 }
1da177e4 4969
02f1175c
JS		 4970 /* Although we don't use this I/O region, we should
4971 request it from the kernel anyway, to avoid problems
4972 with other drivers accessing it. */
4973 if (pci_request_regions(pdev, "Cyclades-Z") != 0) {
4974 printk(KERN_ERR "cyclades: failed to reserve "
4975 "PCI resources\n");
4976 continue;
4977 }
4978
4979 if (mailbox == ZE_V1) {
4980 cy_pci_addr2 = ioremap(cy_pci_phys2,
4981 CyPCI_Ze_win);
4982 if (ZeIndex == NR_CARDS) {
4983 printk("Cyclades-Ze/PCI found at "
4984 "0x%lx but no more cards can "
4985 "be used.\nChange NR_CARDS in "
4986 "cyclades.c and recompile "
4987 "kernel.\n",
4988 (ulong)cy_pci_phys2);
4989 } else {
4990 Ze_phys0[ZeIndex] = cy_pci_phys0;
4991 Ze_phys2[ZeIndex] = cy_pci_phys2;
4992 Ze_addr0[ZeIndex] = cy_pci_addr0;
4993 Ze_addr2[ZeIndex] = cy_pci_addr2;
4994 Ze_irq[ZeIndex] = cy_pci_irq;
4995 Ze_pdev[ZeIndex] = pdev;
4996 ZeIndex++;
4997 }
4998 i--;
4999 continue;
5000 } else {
5001 cy_pci_addr2 = ioremap(cy_pci_phys2,CyPCI_Zwin);
5002 }
1da177e4
LT		 5003
5004#ifdef CY_PCI_DEBUG
02f1175c
JS		 5005 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx "
5006 "ctladdr=0x%lx\n",
5007 (ulong) cy_pci_addr2, (ulong) cy_pci_addr0);
5008 if (mailbox == ZO_V1) {
5009 cy_writel(&((struct RUNTIME_9060 *)
5010 (cy_pci_addr0))->loc_addr_base,
5011 WIN_CREG);
096dcfce 5012 PAUSE;
02f1175c
JS		 5013 printk("Cyclades-8Zo/PCI: FPGA id %lx, ver "
5014 "%lx\n", (ulong) (0xff &
5015 cy_readl(&((struct CUSTOM_REG *)
5016 (cy_pci_addr2))->fpga_id)),
5017 (ulong)(0xff &
5018 cy_readl(&((struct CUSTOM_REG *)
5019 (cy_pci_addr2))->
5020 fpga_version)));
5021 cy_writel(&((struct RUNTIME_9060 *)
5022 (cy_pci_addr0))->loc_addr_base,
5023 WIN_RAM);
5024 } else {
5025 printk("Cyclades-Z/PCI: New Cyclades-Z board. "
5026 "FPGA not loaded\n");
5027 }
1da177e4 5028#endif
02f1175c
JS		 5029 /* The following clears the firmware id word. This
5030 ensures that the driver will not attempt to talk to
5031 the board until it has been properly initialized.
5032 */
096dcfce 5033 PAUSE;
02f1175c
JS		 5034 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5035 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
5036
5037 /* This must be a Cyclades-8Zo/PCI. The extendable
5038 version will have a different device_id and will
5039 be allocated its maximum number of ports. */
5040 cy_pci_nchan = 8;
5041
5042 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5043 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5044 "no channels are available.\nChange "
5045 "NR_PORTS in cyclades.c and recompile "
5046 "kernel.\n", (ulong)cy_pci_phys2);
096dcfce 5047 return i;
02f1175c 5048 }
1da177e4 5049
02f1175c
JS		 5050 /* fill the next cy_card structure available */
5051 for (j = 0; j < NR_CARDS; j++) {
5052 if (cy_card[j].base_addr == 0)
5053 break;
5054 }
5055 if (j == NR_CARDS) { /* no more cy_cards available */
5056 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5057 "no more cards can be used.\nChange "
5058 "NR_CARDS in cyclades.c and recompile "
5059 "kernel.\n", (ulong)cy_pci_phys2);
096dcfce 5060 return i;
02f1175c
JS		 5061 }
5062#ifdef CONFIG_CYZ_INTR
5063 /* allocate IRQ only if board has an IRQ */
5064 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5065 if (request_irq(cy_pci_irq, cyz_interrupt,
5066 IRQF_SHARED, "Cyclades-Z",
5067 &cy_card[j])) {
5068 printk("Cyclom-8Zo/PCI found at 0x%lx "
5069 "but could not allocate "
5070 "IRQ%d.\n", (ulong)cy_pci_phys2,
5071 cy_pci_irq);
096dcfce 5072 return i;
02f1175c
JS		 5073 }
5074 }
5075#endif /* CONFIG_CYZ_INTR */
5076
5077 /* set cy_card */
5078 cy_card[j].base_phys = cy_pci_phys2;
5079 cy_card[j].ctl_phys = cy_pci_phys0;
5080 cy_card[j].base_addr = cy_pci_addr2;
5081 cy_card[j].ctl_addr = cy_pci_addr0;
5082 cy_card[j].irq = (int)cy_pci_irq;
5083 cy_card[j].bus_index = 1;
5084 cy_card[j].first_line = cy_next_channel;
5085 cy_card[j].num_chips = -1;
5086 cy_card[j].pdev = pdev;
5087
5088 /* print message */
1da177e4 5089#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 5090 /* don't report IRQ if board is no IRQ */
5091 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5092 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, "
5093 "IRQ%d, ", j + 1, (ulong)cy_pci_phys2,
5094 (ulong) (cy_pci_phys2 + CyPCI_Zwin - 1),
5095 (int)cy_pci_irq);
5096 else
5097#endif /* CONFIG_CYZ_INTR */
5098 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
5099 j + 1, (ulong)cy_pci_phys2,
5100 (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));
5101
5102 printk("%d channels starting from port %d.\n",
5103 cy_pci_nchan, cy_next_channel);
5104 cy_next_channel += cy_pci_nchan;
1da177e4 5105 }
02f1175c 5106 }
1da177e4 5107
02f1175c
JS		 5108 for (; ZeIndex != 0 && i < NR_CARDS; i++) {
5109 cy_pci_phys0 = Ze_phys0[0];
5110 cy_pci_phys2 = Ze_phys2[0];
5111 cy_pci_addr0 = Ze_addr0[0];
5112 cy_pci_addr2 = Ze_addr2[0];
5113 cy_pci_irq = Ze_irq[0];
5114 pdev = Ze_pdev[0];
5115 for (j = 0; j < ZeIndex - 1; j++) {
5116 Ze_phys0[j] = Ze_phys0[j + 1];
5117 Ze_phys2[j] = Ze_phys2[j + 1];
5118 Ze_addr0[j] = Ze_addr0[j + 1];
5119 Ze_addr2[j] = Ze_addr2[j + 1];
5120 Ze_irq[j] = Ze_irq[j + 1];
5121 Ze_pdev[j] = Ze_pdev[j + 1];
5122 }
5123 ZeIndex--;
1a86b5e3 5124 mailbox = (__u32)cy_readl(&((struct RUNTIME_9060 __iomem *)
02f1175c 5125 cy_pci_addr0)->mail_box_0);
1da177e4 5126#ifdef CY_PCI_DEBUG
02f1175c
JS		 5127 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
5128 (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
5129 printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not "
5130 "loaded\n");
1da177e4 5131#endif
096dcfce 5132 PAUSE;
02f1175c
JS		 5133 /* This must be the new Cyclades-Ze/PCI. */
5134 cy_pci_nchan = ZE_V1_NPORTS;
5135
5136 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5137 printk("Cyclades-Ze/PCI found at 0x%lx but no channels "
5138 "are available.\nChange NR_PORTS in cyclades.c "
5139 "and recompile kernel.\n",
5140 (ulong) cy_pci_phys2);
096dcfce 5141 return i;
02f1175c 5142 }
1da177e4 5143
02f1175c
JS		 5144 /* fill the next cy_card structure available */
5145 for (j = 0; j < NR_CARDS; j++) {
5146 if (cy_card[j].base_addr == 0)
5147 break;
5148 }
5149 if (j == NR_CARDS) { /* no more cy_cards available */
5150 printk("Cyclades-Ze/PCI found at 0x%lx but no more "
5151 "cards can be used.\nChange NR_CARDS in "
5152 "cyclades.c and recompile kernel.\n",
5153 (ulong) cy_pci_phys2);
096dcfce 5154 return i;
02f1175c 5155 }
1da177e4 5156#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 5157 /* allocate IRQ only if board has an IRQ */
5158 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5159 if (request_irq(cy_pci_irq, cyz_interrupt,
5160 IRQF_SHARED, "Cyclades-Z",
5161 &cy_card[j])) {
5162 printk("Cyclom-Ze/PCI found at 0x%lx ",
5163 (ulong) cy_pci_phys2);
5164 printk("but could not allocate IRQ%d.\n",
5165 cy_pci_irq);
096dcfce 5166 return i;
02f1175c 5167 }
1da177e4 5168 }
02f1175c
JS		 5169#endif /* CONFIG_CYZ_INTR */
5170
5171 /* set cy_card */
5172 cy_card[j].base_phys = cy_pci_phys2;
5173 cy_card[j].ctl_phys = cy_pci_phys0;
5174 cy_card[j].base_addr = cy_pci_addr2;
5175 cy_card[j].ctl_addr = cy_pci_addr0;
5176 cy_card[j].irq = (int)cy_pci_irq;
5177 cy_card[j].bus_index = 1;
5178 cy_card[j].first_line = cy_next_channel;
5179 cy_card[j].num_chips = -1;
1da177e4
LT		 5180 cy_card[j].pdev = pdev;
5181
02f1175c 5182 /* print message */
1da177e4
LT		 5183#ifdef CONFIG_CYZ_INTR
5184 /* don't report IRQ if board is no IRQ */
02f1175c
JS		 5185 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5186 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
5187 j + 1, (ulong) cy_pci_phys2,
5188 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1),
5189 (int)cy_pci_irq);
1da177e4 5190 else
02f1175c
JS		 5191#endif /* CONFIG_CYZ_INTR */
5192 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
5193 j + 1, (ulong) cy_pci_phys2,
5194 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1));
5195
5196 printk("%d channels starting from port %d.\n",
5197 cy_pci_nchan, cy_next_channel);
5198 cy_next_channel += cy_pci_nchan;
5199 }
1da177e4 5200 if (ZeIndex != 0) {
02f1175c
JS		 5201 printk("Cyclades-Ze/PCI found at 0x%x but no more cards can be "
5202 "used.\nChange NR_CARDS in cyclades.c and recompile "
5203 "kernel.\n", (unsigned int)Ze_phys2[0]);
1da177e4 5204 }
096dcfce 5205 return i;
1da177e4 5206#else
096dcfce 5207 return 0;
02f1175c
JS		 5208#endif /* ifdef CONFIG_PCI */
5209} /* cy_detect_pci */
1da177e4
LT		 5210
5211/*
5212 * This routine prints out the appropriate serial driver version number
5213 * and identifies which options were configured into this driver.
5214 */
02f1175c 5215static inline void show_version(void)
1da177e4 5216{
096dcfce 5217 printk("Cyclades driver " CY_VERSION "\n");
02f1175c
JS		 5218 printk(" built %s %s\n", __DATE__, __TIME__);
5219} /* show_version */
5220
5221static int
1da177e4 5222cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
02f1175c 5223 int *eof, void *data)
1da177e4 5224{
02f1175c
JS		 5225 struct cyclades_port *info;
5226 int i;
5227 int len = 0;
5228 off_t begin = 0;
5229 off_t pos = 0;
5230 int size;
5231 __u32 cur_jifs = jiffies;
5232
5233 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5234 "IdleIn Overruns Ldisc\n");
5235
5236 pos += size;
1da177e4 5237 len += size;
1da177e4 5238
02f1175c
JS		 5239 /* Output one line for each known port */
5240 for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5241 info = &cy_port[i];
5242
5243 if (info->count)
5244 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5245 "%8lu %9lu %6ld\n", info->line,
096dcfce 5246 (cur_jifs - info->idle_stats.in_use) / HZ,
02f1175c 5247 info->idle_stats.xmit_bytes,
096dcfce 5248 (cur_jifs - info->idle_stats.xmit_idle) / HZ,
02f1175c 5249 info->idle_stats.recv_bytes,
096dcfce 5250 (cur_jifs - info->idle_stats.recv_idle) / HZ,
02f1175c
JS		 5251 info->idle_stats.overruns,
5252 (long)info->tty->ldisc.num);
5253 else
5254 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5255 "%8lu %9lu %6ld\n",
5256 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5257 len += size;
5258 pos = begin + len;
5259
5260 if (pos < offset) {
5261 len = 0;
5262 begin = pos;
5263 }
5264 if (pos > offset + length)
5265 goto done;
1da177e4 5266 }
02f1175c 5267 *eof = 1;
1da177e4 5268done:
02f1175c
JS		 5269 *start = buf + (offset - begin); /* Start of wanted data */
5270 len -= (offset - begin); /* Start slop */
5271 if (len > length)
5272 len = length; /* Ending slop */
5273 if (len < 0)
5274 len = 0;
5275 return len;
1da177e4
LT		 5276}
5277
5278/* The serial driver boot-time initialization code!
5279 Hardware I/O ports are mapped to character special devices on a
5280 first found, first allocated manner. That is, this code searches
5281 for Cyclom cards in the system. As each is found, it is probed
5282 to discover how many chips (and thus how many ports) are present.
5283 These ports are mapped to the tty ports 32 and upward in monotonic
5284 fashion. If an 8-port card is replaced with a 16-port card, the
5285 port mapping on a following card will shift.
5286
5287 This approach is different from what is used in the other serial
5288 device driver because the Cyclom is more properly a multiplexer,
5289 not just an aggregation of serial ports on one card.
5290
5291 If there are more cards with more ports than have been
5292 statically allocated above, a warning is printed and the
5293 extra ports are ignored.
5294 */
5295
b68e31d0 5296static const struct tty_operations cy_ops = {
02f1175c
JS		 5297 .open = cy_open,
5298 .close = cy_close,
5299 .write = cy_write,
5300 .put_char = cy_put_char,
5301 .flush_chars = cy_flush_chars,
5302 .write_room = cy_write_room,
5303 .chars_in_buffer = cy_chars_in_buffer,
5304 .flush_buffer = cy_flush_buffer,
5305 .ioctl = cy_ioctl,
5306 .throttle = cy_throttle,
5307 .unthrottle = cy_unthrottle,
5308 .set_termios = cy_set_termios,
5309 .stop = cy_stop,
5310 .start = cy_start,
5311 .hangup = cy_hangup,
5312 .break_ctl = cy_break,
5313 .wait_until_sent = cy_wait_until_sent,
5314 .read_proc = cyclades_get_proc_info,
5315 .tiocmget = cy_tiocmget,
5316 .tiocmset = cy_tiocmset,
1da177e4
LT		 5317};
5318
02f1175c 5319static int __init cy_init(void)
1da177e4 5320{
02f1175c
JS		 5321 struct cyclades_port *info;
5322 struct cyclades_card *cinfo;
5323 int number_z_boards = 0;
5324 int board, port, i, index;
5325 unsigned long mailbox;
5326 unsigned short chip_number;
5327 int nports;
5328
5329 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5330 if (!cy_serial_driver)
5331 return -ENOMEM;
5332 show_version();
5333
5334 /* Initialize the tty_driver structure */
5335
5336 cy_serial_driver->owner = THIS_MODULE;
5337 cy_serial_driver->driver_name = "cyclades";
5338 cy_serial_driver->name = "ttyC";
5339 cy_serial_driver->major = CYCLADES_MAJOR;
5340 cy_serial_driver->minor_start = 0;
5341 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5342 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5343 cy_serial_driver->init_termios = tty_std_termios;
5344 cy_serial_driver->init_termios.c_cflag =
5345 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5346 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
5347 tty_set_operations(cy_serial_driver, &cy_ops);
5348
5349 if (tty_register_driver(cy_serial_driver))
5350 panic("Couldn't register Cyclades serial driver\n");
5351
5352 for (i = 0; i < NR_CARDS; i++) {
5353 /* base_addr=0 indicates board not found */
5354 cy_card[i].base_addr = NULL;
5355 }
5356
5357 /* the code below is responsible to find the boards. Each different
5358 type of board has its own detection routine. If a board is found,
5359 the next cy_card structure available is set by the detection
5360 routine. These functions are responsible for checking the
5361 availability of cy_card and cy_port data structures and updating
5362 the cy_next_channel. */
5363
5364 /* look for isa boards */
5365 cy_isa_nboard = cy_detect_isa();
5366
5367 /* look for pci boards */
5368 cy_pci_nboard = cy_detect_pci();
5369
5370 cy_nboard = cy_isa_nboard + cy_pci_nboard;
5371
5372 /* invalidate remaining cy_card structures */
5373 for (i = 0; i < NR_CARDS; i++) {
5374 if (cy_card[i].base_addr == 0) {
5375 cy_card[i].first_line = -1;
5376 cy_card[i].ctl_addr = NULL;
5377 cy_card[i].irq = 0;
5378 cy_card[i].bus_index = 0;
5379 cy_card[i].first_line = 0;
5380 cy_card[i].num_chips = 0;
5381 }
5382 }
5383 /* invalidate remaining cy_port structures */
5384 for (i = cy_next_channel; i < NR_PORTS; i++) {
5385 cy_port[i].line = -1;
5386 cy_port[i].magic = -1;
5387 }
5388
5389 /* initialize per-port data structures for each valid board found */
5390 for (board = 0; board < cy_nboard; board++) {
5391 cinfo = &cy_card[board];
5392 if (cinfo->num_chips == -1) { /* Cyclades-Z */
5393 number_z_boards++;
5394 mailbox = cy_readl(&((struct RUNTIME_9060 __iomem *)
5395 cy_card[board].ctl_addr)->
5396 mail_box_0);
5397 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
5398 cinfo->intr_enabled = 0;
5399 cinfo->nports = 0; /* Will be correctly set later, after
5400 Z FW is loaded */
5401 spin_lock_init(&cinfo->card_lock);
5402 for (port = cinfo->first_line;
5403 port < cinfo->first_line + nports; port++) {
5404 info = &cy_port[port];
5405 info->magic = CYCLADES_MAGIC;
5406 info->type = PORT_STARTECH;
5407 info->card = board;
5408 info->line = port;
5409 info->chip_rev = 0;
5410 info->flags = STD_COM_FLAGS;
5411 info->tty = NULL;
5412 if (mailbox == ZO_V1)
5413 info->xmit_fifo_size = CYZ_FIFO_SIZE;
5414 else
5415 info->xmit_fifo_size =
5416 4 * CYZ_FIFO_SIZE;
5417 info->cor1 = 0;
5418 info->cor2 = 0;
5419 info->cor3 = 0;
5420 info->cor4 = 0;
5421 info->cor5 = 0;
5422 info->tbpr = 0;
5423 info->tco = 0;
5424 info->rbpr = 0;
5425 info->rco = 0;
5426 info->custom_divisor = 0;
5427 info->close_delay = 5 * HZ / 10;
5428 info->closing_wait = CLOSING_WAIT_DELAY;
5429 info->icount.cts = info->icount.dsr =
5430 info->icount.rng = info->icount.dcd = 0;
5431 info->icount.rx = info->icount.tx = 0;
5432 info->icount.frame = info->icount.parity = 0;
5433 info->icount.overrun = info->icount.brk = 0;
5434 info->x_char = 0;
5435 info->event = 0;
5436 info->count = 0;
5437 info->blocked_open = 0;
5438 info->default_threshold = 0;
5439 info->default_timeout = 0;
5440 INIT_WORK(&info->tqueue, do_softint);
5441 init_waitqueue_head(&info->open_wait);
5442 init_waitqueue_head(&info->close_wait);
5443 init_waitqueue_head(&info->shutdown_wait);
5444 init_waitqueue_head(&info->delta_msr_wait);
5445 /* info->session */
5446 /* info->pgrp */
5447 info->read_status_mask = 0;
5448 /* info->timeout */
5449 /* Bentson's vars */
5450 info->jiffies[0] = 0;
5451 info->jiffies[1] = 0;
5452 info->jiffies[2] = 0;
5453 info->rflush_count = 0;
1da177e4 5454#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 5455 init_timer(&cyz_rx_full_timer[port]);
5456 cyz_rx_full_timer[port].function = NULL;
1da177e4 5457#endif
02f1175c
JS		 5458 }
5459 continue;
5460 } else { /* Cyclom-Y of some kind */
5461 index = cinfo->bus_index;
5462 spin_lock_init(&cinfo->card_lock);
5463 cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
5464 for (port = cinfo->first_line;
5465 port < cinfo->first_line + cinfo->nports; port++) {
5466 info = &cy_port[port];
5467 info->magic = CYCLADES_MAGIC;
5468 info->type = PORT_CIRRUS;
5469 info->card = board;
5470 info->line = port;
5471 info->flags = STD_COM_FLAGS;
5472 info->tty = NULL;
5473 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
5474 info->cor1 =
5475 CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
5476 info->cor2 = CyETC;
5477 info->cor3 = 0x08; /* _very_ small rcv threshold */
5478 info->cor4 = 0;
5479 info->cor5 = 0;
5480 info->custom_divisor = 0;
5481 info->close_delay = 5 * HZ / 10;
5482 info->closing_wait = CLOSING_WAIT_DELAY;
5483 info->icount.cts = info->icount.dsr =
5484 info->icount.rng = info->icount.dcd = 0;
5485 info->icount.rx = info->icount.tx = 0;
5486 info->icount.frame = info->icount.parity = 0;
5487 info->icount.overrun = info->icount.brk = 0;
5488 chip_number = (port - cinfo->first_line) / 4;
5489 if ((info->chip_rev =
5490 cy_readb(cinfo->base_addr +
5491 (cy_chip_offset[chip_number] <<
5492 index) + (CyGFRCR << index))) >=
5493 CD1400_REV_J) {
5494 /* It is a CD1400 rev. J or later */
5495 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
5496 info->tco = baud_co_60[13]; /* Tx CO */
5497 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
5498 info->rco = baud_co_60[13]; /* Rx CO */
5499 info->rflow = 0;
5500 info->rtsdtr_inv = 1;
5501 } else {
5502 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
5503 info->tco = baud_co_25[13]; /* Tx CO */
5504 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
5505 info->rco = baud_co_25[13]; /* Rx CO */
5506 info->rflow = 0;
5507 info->rtsdtr_inv = 0;
5508 }
5509 info->x_char = 0;
5510 info->event = 0;
5511 info->count = 0;
5512 info->blocked_open = 0;
5513 info->default_threshold = 0;
5514 info->default_timeout = 0;
5515 INIT_WORK(&info->tqueue, do_softint);
5516 init_waitqueue_head(&info->open_wait);
5517 init_waitqueue_head(&info->close_wait);
5518 init_waitqueue_head(&info->shutdown_wait);
5519 init_waitqueue_head(&info->delta_msr_wait);
5520 /* info->session */
5521 /* info->pgrp */
5522 info->read_status_mask =
5523 CyTIMEOUT | CySPECHAR | CyBREAK
5524 | CyPARITY | CyFRAME | CyOVERRUN;
5525 /* info->timeout */
5526 }
5527 }
5528 }
1da177e4
LT		 5529
5530#ifndef CONFIG_CYZ_INTR
02f1175c
JS		 5531 if (number_z_boards && !cyz_timeron) {
5532 cyz_timeron++;
5533 cyz_timerlist.expires = jiffies + 1;
5534 add_timer(&cyz_timerlist);
1da177e4 5535#ifdef CY_PCI_DEBUG
02f1175c 5536 printk("Cyclades-Z polling initialized\n");
1da177e4 5537#endif
02f1175c
JS		 5538 }
5539#endif /* CONFIG_CYZ_INTR */
5540
5541 return 0;
1da177e4 5542
02f1175c 5543} /* cy_init */
1da177e4 5544
02f1175c 5545static void __exit cy_cleanup_module(void)
1da177e4 5546{
02f1175c 5547 int i, e1;
1da177e4
LT		 5548
5549#ifndef CONFIG_CYZ_INTR
02f1175c
JS		 5550 if (cyz_timeron){
5551 cyz_timeron = 0;
5552 del_timer(&cyz_timerlist);
5553 }
1da177e4
LT		 5554#endif /* CONFIG_CYZ_INTR */
5555
02f1175c
JS		 5556 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5557 printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
5558 e1);
1da177e4 5559
02f1175c 5560 put_tty_driver(cy_serial_driver);
1da177e4 5561
02f1175c
JS		 5562 for (i = 0; i < NR_CARDS; i++) {
5563 if (cy_card[i].base_addr) {
5564 iounmap(cy_card[i].base_addr);
5565 if (cy_card[i].ctl_addr)
5566 iounmap(cy_card[i].ctl_addr);
5567 if (cy_card[i].irq
1da177e4 5568#ifndef CONFIG_CYZ_INTR
02f1175c 5569 && cy_card[i].num_chips != -1 /* not a Z card */
1da177e4 5570#endif /* CONFIG_CYZ_INTR */
02f1175c
JS		 5571 )
5572 free_irq(cy_card[i].irq, &cy_card[i]);
1da177e4 5573#ifdef CONFIG_PCI
02f1175c
JS		 5574 if (cy_card[i].pdev)
5575 pci_release_regions(cy_card[i].pdev);
1da177e4 5576#endif
02f1175c
JS		 5577 }
5578 }
1da177e4
LT		 5579} /* cy_cleanup_module */
5580
5581module_init(cy_init);
5582module_exit(cy_cleanup_module);
5583
5584MODULE_LICENSE("GPL");
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