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Char: cyclades, make the isr code readable
[linux-2.6-block.git] / drivers / char / cyclades.c
CommitLineData
1da177e4
LT		 1#undef BLOCKMOVE
2#define Z_WAKE
3#undef Z_EXT_CHARS_IN_BUFFER
1da177e4
LT		 4
5/*
6 * linux/drivers/char/cyclades.c
7 *
8 * This file contains the driver for the Cyclades async multiport
9 * serial boards.
10 *
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
1da177e4 13 *
c8e1693a 14 * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
1da177e4
LT		 15 *
16 * Much of the design and some of the code came from serial.c
17 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
18 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
19 * and then fixed as suggested by Michael K. Johnson 12/12/92.
c8e1693a 20 * Converted to pci probing and cleaned up by Jiri Slaby.
1da177e4
LT		 21 *
22 * This version supports shared IRQ's (only for PCI boards).
23 *
24 * $Log: cyclades.c,v $
25 * Prevent users from opening non-existing Z ports.
26 *
27 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
28 * Fixed the PCI detection function to work properly on Alpha systems.
29 * Implemented support for TIOCSERGETLSR ioctl.
30 * Implemented full support for non-standard baud rates.
31 *
32 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
33 * Request PLX I/O region, although driver doesn't use it, to avoid
34 * problems with other drivers accessing it.
35 * Removed count for on-board buffer characters in cy_chars_in_buffer
36 * (Cyclades-Z only).
37 *
38 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
39 * Driver now reports physical instead of virtual memory addresses.
40 * Masks were added to some Cyclades-Z read accesses.
41 * Implemented workaround for PLX9050 bug that would cause a system lockup
42 * in certain systems, depending on the MMIO addresses allocated to the
43 * board.
44 * Changed the Tx interrupt programming in the CD1400 chips to boost up
45 * performance (Cyclom-Y only).
46 * Code is now compliant with the new module interface (module_[init|exit]).
47 * Make use of the PCI helper functions to access PCI resources.
48 * Did some code "housekeeping".
49 *
50 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
51 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
52 *
53 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
54 * Fixed SMP locking in Cyclom-Y interrupt handler.
55 *
56 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
57 * Added a new cyclades_card field called nports to allow the driver to
58 * know the exact number of ports found by the Z firmware after its load;
59 * RX buffer contention prevention logic on interrupt op mode revisited
60 * (Cyclades-Z only);
61 * Revisited printk's for Z debug;
62 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
63 *
64 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
65 * Fixed bug in cyz_poll that would make all ports but port 0
66 * unable to transmit/receive data (Cyclades-Z only);
67 * Implemented logic to prevent the RX buffer from being stuck with data
68 * due to a driver / firmware race condition in interrupt op mode
69 * (Cyclades-Z only);
70 * Fixed bug in block_til_ready logic that would lead to a system crash;
71 * Revisited cy_close spinlock usage;
72 *
73 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
74 * Revisited CONFIG_PCI conditional compilation for PCI board support;
75 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
76 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
77 * Removed CTS handling from the driver -- this is now completely handled
78 * by the firmware (Cyclades-Z only);
79 * Flush RX on-board buffers on a port open (Cyclades-Z only);
80 * Fixed handling of ASYNC_SPD_* TTY flags;
81 * Module unload now unmaps all memory area allocated by ioremap;
82 *
83 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
84 * Removed CY_PROC conditional compilation;
85 * Implemented SMP-awareness for the driver;
86 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
87 * functions;
88 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
89 * (irq=NN) as parameters (only for ISA boards);
90 * Fixed bug in set_line_char that would prevent the Cyclades-Z
91 * ports from being configured at speeds above 115.2Kbps;
92 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
93 * switching from working properly;
94 * The driver now only prints IRQ info for the Cyclades-Z if it's
95 * configured to work in interrupt mode;
96 *
97 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
98 * Added support for interrupt mode operation for the Z cards;
99 * Removed the driver inactivity control for the Z;
100 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
101 * the Z firmware is not loaded yet;
102 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
103 * same functionality;
104 * Implemented workaround for IRQ setting loss on the PCI configuration
105 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
106 *
107 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
108 * /proc entry location changed to /proc/tty/driver/cyclades;
109 * Added support to shared IRQ's (only for PCI boards);
110 * Added support for Cobalt Qube2 systems;
111 * IRQ [de]allocation scheme revisited;
112 * BREAK implementation changed in order to make use of the 'break_ctl'
113 * TTY facility;
114 * Fixed typo in TTY structure field 'driver_name';
115 * Included a PCI bridge reset and EEPROM reload in the board
116 * initialization code (for both Y and Z series).
117 *
118 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
119 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
120 * closed properly after a SIGINT;
121 * Module usage counter scheme revisited;
122 * Added support to the upcoming Y PCI boards (i.e., support to additional
123 * PCI Device ID's).
124 *
125 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
126 * Removed all unnecessary page-alignement operations in ioremap calls
127 * (ioremap is currently safe for these operations).
128 *
129 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
130 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
131 * order to make PLX9050-based boards work with certain motherboards.
132 *
133 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
134 * cy_close function now resets (correctly) the tty->closing flag;
135 * JIFFIES_DIFF macro fixed.
136 *
137 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
138 * Fixed bug in cy_close function, which was not informing HW of
139 * which port should have the reception disabled before doing so;
140 * fixed Cyclom-8YoP hardware detection bug.
141 *
142 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
143 * Fixed bug in cy_close function, which causes malfunction
144 * of one of the first 4 ports when a higher port is closed
145 * (Cyclom-Y only).
146 *
147 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
148 * Fixed Cyclom-4Yo hardware detection bug.
149 *
150 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
151 * /proc/cyclades implementation with great collaboration of
152 * Marc Lewis <marc@blarg.net>;
153 * cyy_interrupt was changed to avoid occurrence of kernel oopses
154 * during PPP operation.
155 *
156 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
157 * General code review in order to comply with 2.1 kernel standards;
158 * data loss prevention for slow devices revisited (cy_wait_until_sent
159 * was created);
160 * removed conditional compilation for new/old PCI structure support
161 * (now the driver only supports the new PCI structure).
162 *
163 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
164 * added conditional compilation for new/old PCI structure support;
165 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
166 *
167 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
168 * cleaned up the data loss fix;
169 * fixed XON/XOFF handling once more (Cyclades-Z);
170 * general review of the driver routines;
171 * introduction of a mechanism to prevent data loss with slow
172 * printers, by forcing a delay before closing the port.
173 *
174 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
175 * fixed detection/handling of new CD1400 in Ye boards;
176 * fixed XON/XOFF handling (Cyclades-Z);
177 * fixed data loss caused by a premature port close;
178 * introduction of a flag that holds the CD1400 version ID per port
179 * (used by the CYGETCD1400VER new ioctl).
180 *
181 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
182 * Code review for the module cleanup routine;
183 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
184 * includes anonymous changes regarding signal_pending.
185 *
186 * Revision 2.1 1997/11/01 17:42:41 ivan
187 * Changes in the driver to support Alpha systems (except 8Zo V_1);
188 * BREAK fix for the Cyclades-Z boards;
189 * driver inactivity control by FW implemented;
190 * introduction of flag that allows driver to take advantage of
191 * a special CD1400 feature related to HW flow control;
192 * added support for the CD1400 rev. J (Cyclom-Y boards);
193 * introduction of ioctls to:
194 * - control the rtsdtr_inv flag (Cyclom-Y);
195 * - control the rflow flag (Cyclom-Y);
196 * - adjust the polling interval (Cyclades-Z);
197 *
198 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
199 * Fixes related to kernel version conditional
200 * compilation.
201 *
202 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
203 * Compatibility issues between kernels 2.0.x and
204 * 2.1.x (mainly related to clear_bit function).
205 *
206 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
207 * Changes to define the memory window according to the
208 * board type.
209 *
210 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
211 * Changes to support new cycladesZ boards.
212 *
213 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
214 * Merge of Bentson's and Daniel's version 1.36.4.28.
215 * Corrects bug in cy_detect_pci: check if there are more
216 * ports than the number of static structs allocated.
217 * Warning message during initialization if this driver is
218 * used with the new generation of cycladesZ boards. Those
219 * will be supported only in next release of the driver.
220 * Corrects bug in cy_detect_pci and cy_detect_isa that
221 * returned wrong number of VALID boards, when a cyclomY
222 * was found with no serial modules connected.
223 * Changes to use current (2.1.x) kernel subroutine names
224 * and created macros for compilation with 2.0.x kernel,
225 * instead of the other way around.
226 *
227 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
228 * Change queue_task_irq_off to queue_task_irq.
229 * The inline function queue_task_irq_off (tqueue.h)
230 * was removed from latest releases of 2.1.x kernel.
231 * Use of macro __init to mark the initialization
232 * routines, so memory can be reused.
233 * Also incorporate implementation of critical region
234 * in function cleanup_module() created by anonymous
235 * linuxer.
236 *
237 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
238 * Change to support new firmware that solves DCD problem:
239 * application could fail to receive SIGHUP signal when DCD
240 * varying too fast.
241 *
242 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
243 * Changed for support linux versions 2.1.X.
244 * Backward compatible with linux versions 2.0.X.
245 * Corrected illegal use of filler field in
246 * CH_CTRL struct.
247 * Deleted some debug messages.
248 *
249 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
250 * Included check for NULL tty pointer in cyz_poll.
251 *
252 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
253 * Bill Foster at Blarg! Online services noticed that
254 * some of the switch elements of -Z modem control
255 * lacked a closing "break;"
256 *
257 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
258 * Changed low water threshold for buffer xmit_buf
259 *
260 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
261 * Marcio provided fix to modem status fetch for -Z
262 *
263 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
264 * improve mapping of -Z control page (thanks to Steve
265 * Price <stevep@fa.tdktca.com> for help on this)
266 *
267 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
268 * shift from CPU-bound to memcopy in cyz_polling operation
269 *
270 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
271 * Added support to set and report higher speeds.
272 *
273 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
274 * Some fixes in the HW flow control for the BETA release.
275 * Don't try to register the IRQ.
276 *
277 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
278 * make sure "cyc" appears in all kernel messages; all soft interrupts
279 * handled by same routine; recognize out-of-band reception; comment
280 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
33430dc5 281 * fix race condition in -Z buffer management; only -Y needs to explicitly
1da177e4
LT		 282 * flush chars; tidy up some startup messages;
283 *
284 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
285 * shift MOD_INC_USE_COUNT location to match
286 * serial.c; purge some diagnostic messages;
287 *
288 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
289 * enable modem status messages and fetch & process them; note
290 * time of last activity type for each port; set_line_char now
291 * supports more than line 0 and treats 0 baud correctly;
292 * get_modem_info senses rs_status;
293 *
294 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
295 * barely works--now's time to turn on
296 * more features 'til it breaks
297 *
298 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
299 * check more -Z board status; shorten boot message
300 *
301 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
302 * fix reference to ch_ctrl in startup; verify return
303 * values from cyz_issue_cmd and cyz_update_channel;
304 * more stuff to get modem control correct;
305 *
306 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
307 * more -Z stuff folded in; re-order changes to put -Z stuff
308 * after -Y stuff (to make changes clearer)
309 *
310 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
311 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
312 * Add code to send break. Clear firmware ID word at startup (so
313 * that other code won't talk to inactive board).
314 *
315 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
316 * add code for -Z in set_line_char
317 *
318 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
319 * fold more -Z stuff (or in some cases, error messages)
320 * into driver; add text to "don't know what to do" messages.
321 *
322 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
323 * moved compile-time flags near top of file; cosmetic changes
324 * to narrow text (to allow 2-up printing); changed many declarations
325 * to "static" to limit external symbols; shuffled code order to
326 * coalesce -Y and -Z specific code, also to put internal functions
327 * in order of tty_driver structure; added code to recognize -Z
328 * ports (and for moment, do nothing or report error); add cy_startup
329 * to parse boot command line for extra base addresses for ISA probes;
330 *
331 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
332 * reorder some code, fix types of some vars (int vs. long),
333 * add cy_setup to support user declared ISA addresses
334 *
335 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
336 * dump ioctl based firmware load (it's now a user level
337 * program); ensure uninitialzed ports cannot be used
338 *
339 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
340 * rename vars and restructure some code
341 *
342 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
343 * get right status back after boot load
344 *
345 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
346 * successfully loads firmware
347 *
348 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
349 * add more of the code for the boot/load ioctls
350 *
351 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
352 * start to add Z functionality--starting with ioctl
353 * for loading firmware
354 *
355 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
356 * added code to recognize Z/PCI card at initialization; report
357 * presence, but card is not initialized (because firmware needs
358 * to be loaded)
359 *
360 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
361 * starting minor number at zero; added missing verify_area
362 * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
363 *
364 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
365 * remove unneeded boot message & fix CLOCAL hardware flow
366 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
367 * remove unused diagnostic statements; minor 0 is first;
368 *
369 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
370 * The kernel function vremap (available only in later 1.3.xx kernels)
371 * allows the access to memory addresses above the RAM. This revision
372 * of the driver supports PCI boards below 1Mb (device id 0x100) and
373 * above 1Mb (device id 0x101).
374 *
375 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
376 * Some global changes to interrupt handling spilled into
377 * this driver--mostly unused arguments in system function
378 * calls. Also added change by Marcio Saito which should
379 * reduce lost interrupts at startup by fast processors.
380 *
381 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
382 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
383 * in 1.3.41 kernel to remove a possible race condition, extend
384 * some error messages, and let the driver run as a loadable module
385 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
386 * possible race condition.
387 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
388 *
389 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
390 * Changes by Linus Torvalds in 1.3.33 kernel distribution
391 * required due to reordering of driver initialization.
392 * Drivers are now initialized *after* memory management.
393 *
394 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
395 * remove printk from ISR; fix typo
396 *
397 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
398 * Minor fixes in the PCI board support. PCI function calls in
399 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
400 * <duncan@okay.com>. "bad serial count" message removed.
401 *
402 * Revision 1.36.3 1995/08/22 09:19:42 marcio
403 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
404 * board initialization. Changes in the boot messages. The driver
405 * supports up to 4 boards and 64 ports by default.
406 *
407 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
408 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
409 *
410 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
411 * add missing break in modem control block in ioctl switch statement
412 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
413 *
414 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
415 * make sure CTS flow control is set as soon as possible (thanks
416 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
417 *
418 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
419 * initialize defaults for receive threshold and stale data timeout;
420 * cosmetic changes;
421 *
422 * Revision 1.36 1995/03/10 23:33:53 bentson
423 * added support of chips 4-7 in 32 port Cyclom-Ye;
424 * fix cy_interrupt pointer dereference problem
425 * (Joe Portman <baron@aa.net>);
426 * give better error response if open is attempted on non-existent port
427 * (Zachariah Vaum <jchryslr@netcom.com>);
428 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
429 * conditional compilation for -16Y on systems with fast, noisy bus;
430 * comment out diagnostic print function;
431 * cleaned up table of base addresses;
432 * set receiver time-out period register to correct value,
433 * set receive threshold to better default values,
434 * set chip timer to more accurate 200 Hz ticking,
435 * add code to monitor and modify receive parameters
436 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
437 * <njs@scifi.emi.net>);
438 *
439 * Revision 1.35 1994/12/16 13:54:18 steffen
440 * additional patch by Marcio Saito for board detection
441 * Accidently left out in 1.34
442 *
443 * Revision 1.34 1994/12/10 12:37:12 steffen
444 * This is the corrected version as suggested by Marcio Saito
445 *
446 * Revision 1.33 1994/12/01 22:41:18 bentson
447 * add hooks to support more high speeds directly; add tytso
448 * patch regarding CLOCAL wakeups
449 *
450 * Revision 1.32 1994/11/23 19:50:04 bentson
451 * allow direct kernel control of higher signalling rates;
452 * look for cards at additional locations
453 *
454 * Revision 1.31 1994/11/16 04:33:28 bentson
455 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
456 * a problem in chars_in_buffer has been resolved by some
457 * small changes; this should yield smoother output
458 *
459 * Revision 1.30 1994/11/16 04:28:05 bentson
460 * Fix from Corey Minyard, Internet: minyard@metronet.com,
461 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
462 * cy_hangup that appears to clear up much (all?) of the
463 * DTR glitches; also he's added/cleaned-up diagnostic messages
464 *
465 * Revision 1.29 1994/11/16 04:16:07 bentson
466 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
467 * operate higher speeds in same way as other serial ports;
468 * add more serial ports (for up to two 16-port muxes).
469 *
470 * Revision 1.28 1994/11/04 00:13:16 root
471 * turn off diagnostic messages
472 *
473 * Revision 1.27 1994/11/03 23:46:37 root
474 * bunch of changes to bring driver into greater conformance
475 * with the serial.c driver (looking for missed fixes)
476 *
477 * Revision 1.26 1994/11/03 22:40:36 root
478 * automatic interrupt probing fixed.
479 *
480 * Revision 1.25 1994/11/03 20:17:02 root
481 * start to implement auto-irq
482 *
483 * Revision 1.24 1994/11/03 18:01:55 root
484 * still working on modem signals--trying not to drop DTR
485 * during the getty/login processes
486 *
487 * Revision 1.23 1994/11/03 17:51:36 root
488 * extend baud rate support; set receive threshold as function
489 * of baud rate; fix some problems with RTS/CTS;
490 *
491 * Revision 1.22 1994/11/02 18:05:35 root
492 * changed arguments to udelay to type long to get
493 * delays to be of correct duration
494 *
495 * Revision 1.21 1994/11/02 17:37:30 root
496 * employ udelay (after calibrating loops_per_second earlier
497 * in init/main.c) instead of using home-grown delay routines
498 *
499 * Revision 1.20 1994/11/02 03:11:38 root
500 * cy_chars_in_buffer forces a return value of 0 to let
501 * login work (don't know why it does); some functions
502 * that were returning EFAULT, now executes the code;
503 * more work on deciding when to disable xmit interrupts;
504 *
505 * Revision 1.19 1994/11/01 20:10:14 root
506 * define routine to start transmission interrupts (by enabling
507 * transmit interrupts); directly enable/disable modem interrupts;
508 *
509 * Revision 1.18 1994/11/01 18:40:45 bentson
510 * Don't always enable transmit interrupts in startup; interrupt on
511 * TxMpty instead of TxRdy to help characters get out before shutdown;
512 * restructure xmit interrupt to check for chars first and quit if
513 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
514 * (to my view);
515 *
516 * Revision 1.17 1994/10/30 04:39:45 bentson
517 * rename serial_driver and callout_driver to cy_serial_driver and
518 * cy_callout_driver to avoid linkage interference; initialize
519 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
520 * from cyclades_port structure; add paranoia check to cy_close;
521 *
522 * Revision 1.16 1994/10/30 01:14:33 bentson
523 * change major numbers; add some _early_ return statements;
524 *
525 * Revision 1.15 1994/10/29 06:43:15 bentson
526 * final tidying up for clean compile; enable some error reporting
527 *
528 * Revision 1.14 1994/10/28 20:30:22 Bentson
529 * lots of changes to drag the driver towards the new tty_io
530 * structures and operation. not expected to work, but may
531 * compile cleanly.
532 *
533 * Revision 1.13 1994/07/21 23:08:57 Bentson
534 * add some diagnostic cruft; support 24 lines (for testing
535 * both -8Y and -16Y cards; be more thorough in servicing all
536 * chips during interrupt; add "volatile" a few places to
537 * circumvent compiler optimizations; fix base & offset
538 * computations in block_til_ready (was causing chip 0 to
539 * stop operation)
540 *
541 * Revision 1.12 1994/07/19 16:42:11 Bentson
542 * add some hackery for kernel version 1.1.8; expand
543 * error messages; refine timing for delay loops and
544 * declare loop params volatile
545 *
546 * Revision 1.11 1994/06/11 21:53:10 bentson
547 * get use of save_car right in transmit interrupt service
548 *
549 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
550 * add some diagnostic printing; try to fix save_car stuff
551 *
552 * Revision 1.10 1994/06/11 20:36:08 bentson
553 * clean up compiler warnings
554 *
555 * Revision 1.9 1994/06/11 19:42:46 bentson
556 * added a bunch of code to support modem signalling
557 *
558 * Revision 1.8 1994/06/11 17:57:07 bentson
559 * recognize break & parity error
560 *
561 * Revision 1.7 1994/06/05 05:51:34 bentson
562 * Reorder baud table to be monotonic; add cli to CP; discard
563 * incoming characters and status if the line isn't open; start to
564 * fold code into cy_throttle; start to port get_serial_info,
565 * set_serial_info, get_modem_info, set_modem_info, and send_break
566 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
567 * get flow control characters from tty struct; invalidate ports w/o
568 * hardware;
569 *
570 * Revision 1.6 1994/05/31 18:42:21 bentson
571 * add a loop-breaker in the interrupt service routine;
572 * note when port is initialized so that it can be shut
573 * down under the right conditions; receive works without
574 * any obvious errors
575 *
576 * Revision 1.5 1994/05/30 00:55:02 bentson
577 * transmit works without obvious errors
578 *
579 * Revision 1.4 1994/05/27 18:46:27 bentson
580 * incorporated more code from lib_y.c; can now print short
581 * strings under interrupt control to port zero; seems to
582 * select ports/channels/lines correctly
583 *
584 * Revision 1.3 1994/05/25 22:12:44 bentson
585 * shifting from multi-port on a card to proper multiplexor
586 * data structures; added skeletons of most routines
587 *
588 * Revision 1.2 1994/05/19 13:21:43 bentson
589 * start to crib from other sources
590 *
591 */
592
c8e1693a 593#define CY_VERSION "2.5"
096dcfce 594
1da177e4
LT		 595/* If you need to install more boards than NR_CARDS, change the constant
596 in the definition below. No other change is necessary to support up to
597 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
598
02f1175c 599#define NR_CARDS 4
1da177e4
LT		 600
601/*
602 If the total number of ports is larger than NR_PORTS, change this
603 constant in the definition below. No other change is necessary to
604 support more boards/ports. */
605
02f1175c 606#define NR_PORTS 256
1da177e4
LT		 607
608#define ZE_V1_NPORTS 64
609#define ZO_V1 0
610#define ZO_V2 1
611#define ZE_V1 2
612
613#define SERIAL_PARANOIA_CHECK
614#undef CY_DEBUG_OPEN
615#undef CY_DEBUG_THROTTLE
616#undef CY_DEBUG_OTHER
617#undef CY_DEBUG_IO
618#undef CY_DEBUG_COUNT
619#undef CY_DEBUG_DTR
620#undef CY_DEBUG_WAIT_UNTIL_SENT
621#undef CY_DEBUG_INTERRUPTS
622#undef CY_16Y_HACK
623#undef CY_ENABLE_MONITORING
624#undef CY_PCI_DEBUG
625
1da177e4
LT		 626/*
627 * Include section
628 */
1da177e4
LT		 629#include <linux/module.h>
630#include <linux/errno.h>
631#include <linux/signal.h>
632#include <linux/sched.h>
633#include <linux/timer.h>
634#include <linux/interrupt.h>
635#include <linux/tty.h>
33f0f88f 636#include <linux/tty_flip.h>
1da177e4
LT		 637#include <linux/serial.h>
638#include <linux/major.h>
639#include <linux/string.h>
640#include <linux/fcntl.h>
641#include <linux/ptrace.h>
642#include <linux/cyclades.h>
643#include <linux/mm.h>
644#include <linux/ioport.h>
645#include <linux/init.h>
646#include <linux/delay.h>
647#include <linux/spinlock.h>
648#include <linux/bitops.h>
054f5b0a 649#include <linux/firmware.h>
1da177e4
LT		 650
651#include <asm/system.h>
652#include <asm/io.h>
653#include <asm/irq.h>
654#include <asm/uaccess.h>
655
1da177e4
LT		 656#include <linux/kernel.h>
657#include <linux/pci.h>
658
659#include <linux/stat.h>
660#include <linux/proc_fs.h>
661
02f1175c
JS		 662static void cy_throttle(struct tty_struct *tty);
663static void cy_send_xchar(struct tty_struct *tty, char ch);
1da177e4
LT		 664
665#define IS_CYC_Z(card) ((card).num_chips == -1)
666
667#define Z_FPGA_CHECK(card) \
db05c3b1 668 ((readl(&((struct RUNTIME_9060 __iomem *) \
02f1175c 669 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
1da177e4 670
db05c3b1 671#define ISZLOADED(card) (((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \
1da177e4
LT		 672 ((card).ctl_addr))->mail_box_0)) || \
673 Z_FPGA_CHECK(card)) && \
db05c3b1 674 (ZFIRM_ID==readl(&((struct FIRM_ID __iomem *) \
1da177e4
LT		 675 ((card).base_addr+ID_ADDRESS))->signature)))
676
677#ifndef SERIAL_XMIT_SIZE
678#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
679#endif
680#define WAKEUP_CHARS 256
681
682#define STD_COM_FLAGS (0)
683
054f5b0a
JS		 684/* firmware stuff */
685#define ZL_MAX_BLOCKS 16
686#define DRIVER_VERSION 0x02010203
687#define RAM_SIZE 0x80000
688
689#define Z_FPGA_LOADED(X) ((readl(&(X)->init_ctrl) & (1<<17)) != 0)
690
691enum zblock_type {
692 ZBLOCK_PRG = 0,
693 ZBLOCK_FPGA = 1
694};
695
696struct zfile_header {
697 char name[64];
698 char date[32];
699 char aux[32];
700 u32 n_config;
701 u32 config_offset;
702 u32 n_blocks;
703 u32 block_offset;
704 u32 reserved[9];
705} __attribute__ ((packed));
706
707struct zfile_config {
708 char name[64];
709 u32 mailbox;
710 u32 function;
711 u32 n_blocks;
712 u32 block_list[ZL_MAX_BLOCKS];
713} __attribute__ ((packed));
714
715struct zfile_block {
716 u32 type;
717 u32 file_offset;
718 u32 ram_offset;
719 u32 size;
720} __attribute__ ((packed));
721
1da177e4
LT		 722static struct tty_driver *cy_serial_driver;
723
724#ifdef CONFIG_ISA
725/* This is the address lookup table. The driver will probe for
726 Cyclom-Y/ISA boards at all addresses in here. If you want the
727 driver to probe addresses at a different address, add it to
728 this table. If the driver is probing some other board and
729 causing problems, remove the offending address from this table.
730 The cy_setup function extracts additional addresses from the
731 boot options line. The form is "cyclades=address,address..."
732*/
733
734static unsigned int cy_isa_addresses[] = {
02f1175c
JS		 735 0xD0000,
736 0xD2000,
737 0xD4000,
738 0xD6000,
739 0xD8000,
740 0xDA000,
741 0xDC000,
742 0xDE000,
743 0, 0, 0, 0, 0, 0, 0, 0
1da177e4 744};
02f1175c 745
fe971071 746#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
1da177e4
LT		 747
748#ifdef MODULE
3046d50e
JS		 749static long maddr[NR_CARDS];
750static int irq[NR_CARDS];
1da177e4
LT		 751
752module_param_array(maddr, long, NULL, 0);
753module_param_array(irq, int, NULL, 0);
754#endif
755
02f1175c 756#endif /* CONFIG_ISA */
1da177e4
LT		 757
758/* This is the per-card data structure containing address, irq, number of
759 channels, etc. This driver supports a maximum of NR_CARDS cards.
760*/
761static struct cyclades_card cy_card[NR_CARDS];
762
02f1175c 763static int cy_next_channel; /* next minor available */
1da177e4 764
1da177e4
LT		 765/*
766 * This is used to look up the divisor speeds and the timeouts
767 * We're normally limited to 15 distinct baud rates. The extra
768 * are accessed via settings in info->flags.
769 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
770 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
771 * HI VHI
772 * 20
773 */
774static int baud_table[] = {
02f1175c
JS		 775 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
776 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
777 230400, 0
778};
779
780static char baud_co_25[] = { /* 25 MHz clock option table */
781 /* value => 00 01 02 03 04 */
782 /* divide by 8 32 128 512 2048 */
783 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
784 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
785};
786
787static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
788 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
789 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
790};
791
792static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
793 /* value => 00 01 02 03 04 */
794 /* divide by 8 32 128 512 2048 */
795 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
796 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
797 0x00
798};
799
800static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
801 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
802 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
803 0x21
804};
805
806static char baud_cor3[] = { /* receive threshold */
807 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
808 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
809 0x07
810};
1da177e4
LT		 811
812/*
813 * The Cyclades driver implements HW flow control as any serial driver.
814 * The cyclades_port structure member rflow and the vector rflow_thr
815 * allows us to take advantage of a special feature in the CD1400 to avoid
816 * data loss even when the system interrupt latency is too high. These flags
817 * are to be used only with very special applications. Setting these flags
818 * requires the use of a special cable (DTR and RTS reversed). In the new
819 * CD1400-based boards (rev. 6.00 or later), there is no need for special
820 * cables.
821 */
822
02f1175c
JS		 823static char rflow_thr[] = { /* rflow threshold */
824 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
825 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
826 0x0a
827};
1da177e4
LT		 828
829/* The Cyclom-Ye has placed the sequential chips in non-sequential
830 * address order. This look-up table overcomes that problem.
831 */
02f1175c
JS		 832static int cy_chip_offset[] = { 0x0000,
833 0x0400,
834 0x0800,
835 0x0C00,
836 0x0200,
837 0x0600,
838 0x0A00,
839 0x0E00
840};
1da177e4
LT		 841
842/* PCI related definitions */
843
1da177e4 844#ifdef CONFIG_PCI
893de2df
JS		 845static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
846 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, /* PCI < 1Mb */
847 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, /* PCI > 1Mb */
848 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, /* 4Y PCI < 1Mb */
849 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, /* 4Y PCI > 1Mb */
850 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, /* 8Y PCI < 1Mb */
851 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, /* 8Y PCI > 1Mb */
852 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, /* Z PCI < 1Mb */
853 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, /* Z PCI > 1Mb */
854 { } /* end of table */
02f1175c 855};
893de2df 856MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
1da177e4
LT		 857#endif
858
859static void cy_start(struct tty_struct *);
860static void set_line_char(struct cyclades_port *);
1a86b5e3 861static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
1da177e4
LT		 862#ifdef CONFIG_ISA
863static unsigned detect_isa_irq(void __iomem *);
02f1175c 864#endif /* CONFIG_ISA */
1da177e4 865
02f1175c 866static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
1da177e4
LT		 867
868#ifndef CONFIG_CYZ_INTR
869static void cyz_poll(unsigned long);
870
871/* The Cyclades-Z polling cycle is defined by this variable */
872static long cyz_polling_cycle = CZ_DEF_POLL;
873
8d06afab 874static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
1da177e4 875
02f1175c 876#else /* CONFIG_CYZ_INTR */
1da177e4
LT		 877static void cyz_rx_restart(unsigned long);
878static struct timer_list cyz_rx_full_timer[NR_PORTS];
02f1175c 879#endif /* CONFIG_CYZ_INTR */
1da177e4 880
02f1175c
JS		 881static inline int serial_paranoia_check(struct cyclades_port *info,
882 char *name, const char *routine)
1da177e4
LT		 883{
884#ifdef SERIAL_PARANOIA_CHECK
02f1175c 885 if (!info) {
21719191
JS		 886 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
887 "in %s\n", name, routine);
02f1175c
JS		 888 return 1;
889 }
890
02f1175c 891 if (info->magic != CYCLADES_MAGIC) {
21719191
JS		 892 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
893 "struct (%s) in %s\n", name, routine);
02f1175c
JS		 894 return 1;
895 }
1da177e4 896#endif
02f1175c
JS		 897 return 0;
898} /* serial_paranoia_check */
1da177e4 899
1da177e4
LT		 900/***********************************************************/
901/********* Start of block of Cyclom-Y specific code ********/
902
903/* This routine waits up to 1000 micro-seconds for the previous
904 command to the Cirrus chip to complete and then issues the
905 new command. An error is returned if the previous command
906 didn't finish within the time limit.
907
908 This function is only called from inside spinlock-protected code.
909 */
02f1175c 910static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
1da177e4 911{
ad39c300 912 unsigned int i;
1da177e4 913
02f1175c
JS		 914 /* Check to see that the previous command has completed */
915 for (i = 0; i < 100; i++) {
db05c3b1 916 if (readb(base_addr + (CyCCR << index)) == 0) {
02f1175c
JS		 917 break;
918 }
919 udelay(10L);
1da177e4 920 }
02f1175c
JS		 921 /* if the CCR never cleared, the previous command
922 didn't finish within the "reasonable time" */
923 if (i == 100)
096dcfce 924 return -1;
1da177e4 925
02f1175c
JS		 926 /* Issue the new command */
927 cy_writeb(base_addr + (CyCCR << index), cmd);
1da177e4 928
096dcfce 929 return 0;
02f1175c 930} /* cyy_issue_cmd */
1da177e4
LT		 931
932#ifdef CONFIG_ISA
933/* ISA interrupt detection code */
02f1175c 934static unsigned detect_isa_irq(void __iomem * address)
1da177e4 935{
02f1175c
JS		 936 int irq;
937 unsigned long irqs, flags;
938 int save_xir, save_car;
939 int index = 0; /* IRQ probing is only for ISA */
940
941 /* forget possible initially masked and pending IRQ */
942 irq = probe_irq_off(probe_irq_on());
943
944 /* Clear interrupts on the board first */
945 cy_writeb(address + (Cy_ClrIntr << index), 0);
946 /* Cy_ClrIntr is 0x1800 */
947
948 irqs = probe_irq_on();
949 /* Wait ... */
950 udelay(5000L);
951
952 /* Enable the Tx interrupts on the CD1400 */
953 local_irq_save(flags);
954 cy_writeb(address + (CyCAR << index), 0);
955 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
956
957 cy_writeb(address + (CyCAR << index), 0);
958 cy_writeb(address + (CySRER << index),
db05c3b1 959 readb(address + (CySRER << index)) | CyTxRdy);
02f1175c
JS		 960 local_irq_restore(flags);
961
962 /* Wait ... */
963 udelay(5000L);
964
965 /* Check which interrupt is in use */
966 irq = probe_irq_off(irqs);
967
968 /* Clean up */
db05c3b1
JS		 969 save_xir = (u_char) readb(address + (CyTIR << index));
970 save_car = readb(address + (CyCAR << index));
02f1175c
JS		 971 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
972 cy_writeb(address + (CySRER << index),
db05c3b1 973 readb(address + (CySRER << index)) & ~CyTxRdy);
02f1175c
JS		 974 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
975 cy_writeb(address + (CyCAR << index), (save_car));
976 cy_writeb(address + (Cy_ClrIntr << index), 0);
977 /* Cy_ClrIntr is 0x1800 */
978
979 return (irq > 0) ? irq : 0;
1da177e4 980}
02f1175c 981#endif /* CONFIG_ISA */
1da177e4 982
ce97a097
JS		 983static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
984 void __iomem *base_addr)
e941027f
JS		 985{
986 struct cyclades_port *info;
987 struct tty_struct *tty;
ad39c300 988 int char_count;
ce97a097 989 int j, len, index = cinfo->bus_index;
e941027f
JS		 990 int save_xir, channel, save_car;
991 char data;
992
e941027f 993#ifdef CY_DEBUG_INTERRUPTS
ce97a097 994 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
e941027f 995#endif
ce97a097
JS		 996 /* determine the channel & change to that context */
997 spin_lock(&cinfo->card_lock);
998 save_xir = (u_char) readb(base_addr + (CyRIR << index));
999 channel = (u_short) (save_xir & CyIRChannel);
1000 info = &cinfo->ports[channel + chip * 4];
1001 save_car = readb(base_addr + (CyCAR << index));
1002 cy_writeb(base_addr + (CyCAR << index), save_xir);
1003
1004 /* if there is nowhere to put the data, discard it */
1005 if (info->tty == NULL) {
1006 j = (readb(base_addr + (CyRIVR << index)) & CyIVRMask);
1007 if (j == CyIVRRxEx) { /* exception */
1008 data = readb(base_addr + (CyRDSR << index));
1009 } else { /* normal character reception */
1010 char_count = readb(base_addr + (CyRDCR << index));
1011 while (char_count--)
db05c3b1 1012 data = readb(base_addr + (CyRDSR << index));
ce97a097
JS		 1013 }
1014 goto end;
1015 }
1016 /* there is an open port for this data */
1017 tty = info->tty;
1018 j = readb(base_addr + (CyRIVR << index)) & CyIVRMask;
1019 if (j == CyIVRRxEx) { /* exception */
1020 data = readb(base_addr + (CyRDSR << index));
1021
1022 /* For statistics only */
1023 if (data & CyBREAK)
1024 info->icount.brk++;
1025 else if (data & CyFRAME)
1026 info->icount.frame++;
1027 else if (data & CyPARITY)
1028 info->icount.parity++;
1029 else if (data & CyOVERRUN)
1030 info->icount.overrun++;
1031
1032 if (data & info->ignore_status_mask) {
1033 info->icount.rx++;
1034 spin_unlock(&cinfo->card_lock);
1035 return;
1036 }
1037 if (tty_buffer_request_room(tty, 1)) {
1038 if (data & info->read_status_mask) {
1039 if (data & CyBREAK) {
1040 tty_insert_flip_char(tty,
1041 readb(base_addr + (CyRDSR <<
1042 index)), TTY_BREAK);
1043 info->icount.rx++;
1044 if (info->flags & ASYNC_SAK)
1045 do_SAK(tty);
1046 } else if (data & CyFRAME) {
1047 tty_insert_flip_char( tty,
1048 readb(base_addr + (CyRDSR <<
1049 index)), TTY_FRAME);
1050 info->icount.rx++;
1051 info->idle_stats.frame_errs++;
1052 } else if (data & CyPARITY) {
1053 /* Pieces of seven... */
1054 tty_insert_flip_char(tty,
1055 readb(base_addr + (CyRDSR <<
1056 index)), TTY_PARITY);
1057 info->icount.rx++;
1058 info->idle_stats.parity_errs++;
1059 } else if (data & CyOVERRUN) {
1060 tty_insert_flip_char(tty, 0,
1061 TTY_OVERRUN);
1062 info->icount.rx++;
1063 /* If the flip buffer itself is
1064 overflowing, we still lose
1065 the next incoming character.
1066 */
1067 tty_insert_flip_char(tty,
1068 readb(base_addr + (CyRDSR <<
1069 index)), TTY_FRAME);
02f1175c 1070 info->icount.rx++;
02f1175c 1071 info->idle_stats.overruns++;
ce97a097
JS		 1072 /* These two conditions may imply */
1073 /* a normal read should be done. */
1074 /* } else if(data & CyTIMEOUT) { */
1075 /* } else if(data & CySPECHAR) { */
1076 } else {
1077 tty_insert_flip_char(tty, 0,
1078 TTY_NORMAL);
1079 info->icount.rx++;
02f1175c 1080 }
ce97a097
JS		 1081 } else {
1082 tty_insert_flip_char(tty, 0, TTY_NORMAL);
1083 info->icount.rx++;
1084 }
1085 } else {
1086 /* there was a software buffer overrun and nothing
1087 * could be done about it!!! */
1088 info->icount.buf_overrun++;
1089 info->idle_stats.overruns++;
1090 }
1091 } else { /* normal character reception */
1092 /* load # chars available from the chip */
1093 char_count = readb(base_addr + (CyRDCR << index));
e941027f
JS		 1094
1095#ifdef CY_ENABLE_MONITORING
ce97a097
JS		 1096 ++info->mon.int_count;
1097 info->mon.char_count += char_count;
1098 if (char_count > info->mon.char_max)
1099 info->mon.char_max = char_count;
1100 info->mon.char_last = char_count;
e941027f 1101#endif
ce97a097
JS		 1102 len = tty_buffer_request_room(tty, char_count);
1103 while (len--) {
1104 data = readb(base_addr + (CyRDSR << index));
1105 tty_insert_flip_char(tty, data, TTY_NORMAL);
1106 info->idle_stats.recv_bytes++;
1107 info->icount.rx++;
e941027f 1108#ifdef CY_16Y_HACK
ce97a097 1109 udelay(10L);
e941027f 1110#endif
e941027f 1111 }
ce97a097 1112 info->idle_stats.recv_idle = jiffies;
e941027f 1113 }
ce97a097
JS		 1114 tty_schedule_flip(tty);
1115end:
1116 /* end of service */
1117 cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f);
1118 cy_writeb(base_addr + (CyCAR << index), save_car);
1119 spin_unlock(&cinfo->card_lock);
1120}
e941027f 1121
ce97a097
JS		 1122static void cyy_chip_tx(struct cyclades_card *cinfo, int chip,
1123 void __iomem *base_addr)
1124{
1125 struct cyclades_port *info;
1126 int char_count;
1127 int outch;
1128 int save_xir, channel, save_car, index = cinfo->bus_index;
1129
1130 /* Since we only get here when the transmit buffer
1131 is empty, we know we can always stuff a dozen
1132 characters. */
e941027f 1133#ifdef CY_DEBUG_INTERRUPTS
ce97a097 1134 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
e941027f
JS		 1135#endif
1136
ce97a097
JS		 1137 /* determine the channel & change to that context */
1138 spin_lock(&cinfo->card_lock);
1139 save_xir = (u_char) readb(base_addr + (CyTIR << index));
1140 channel = (u_short) (save_xir & CyIRChannel);
1141 save_car = readb(base_addr + (CyCAR << index));
1142 cy_writeb(base_addr + (CyCAR << index), save_xir);
1143
1144 /* validate the port# (as configured and open) */
1145 if (channel + chip * 4 >= cinfo->nports) {
1146 cy_writeb(base_addr + (CySRER << index),
1147 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1148 goto end;
1149 }
1150 info = &cinfo->ports[channel + chip * 4];
1151 if (info->tty == NULL) {
1152 cy_writeb(base_addr + (CySRER << index),
1153 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1154 goto end;
1155 }
02f1175c 1156
ce97a097
JS		 1157 /* load the on-chip space for outbound data */
1158 char_count = info->xmit_fifo_size;
02f1175c 1159
ce97a097
JS		 1160 if (info->x_char) { /* send special char */
1161 outch = info->x_char;
1162 cy_writeb(base_addr + (CyTDR << index), outch);
1163 char_count--;
1164 info->icount.tx++;
1165 info->x_char = 0;
1166 }
02f1175c 1167
ce97a097
JS		 1168 if (info->breakon || info->breakoff) {
1169 if (info->breakon) {
1170 cy_writeb(base_addr + (CyTDR << index), 0);
1171 cy_writeb(base_addr + (CyTDR << index), 0x81);
1172 info->breakon = 0;
1173 char_count -= 2;
e941027f 1174 }
ce97a097
JS		 1175 if (info->breakoff) {
1176 cy_writeb(base_addr + (CyTDR << index), 0);
1177 cy_writeb(base_addr + (CyTDR << index), 0x83);
1178 info->breakoff = 0;
1179 char_count -= 2;
e941027f 1180 }
ce97a097 1181 }
02f1175c 1182
ce97a097
JS		 1183 while (char_count-- > 0) {
1184 if (!info->xmit_cnt) {
1185 if (readb(base_addr + (CySRER << index)) & CyTxMpty) {
1186 cy_writeb(base_addr + (CySRER << index),
1187 readb(base_addr + (CySRER << index)) &
02f1175c 1188 ~CyTxMpty);
ce97a097
JS		 1189 } else {
1190 cy_writeb(base_addr + (CySRER << index),
1191 (readb(base_addr + (CySRER << index)) &
02f1175c 1192 ~CyTxRdy) | CyTxMpty);
02f1175c 1193 }
ce97a097
JS		 1194 goto done;
1195 }
1196 if (info->xmit_buf == NULL) {
1197 cy_writeb(base_addr + (CySRER << index),
1198 readb(base_addr + (CySRER << index)) &
02f1175c 1199 ~CyTxRdy);
ce97a097
JS		 1200 goto done;
1201 }
1202 if (info->tty->stopped || info->tty->hw_stopped) {
1203 cy_writeb(base_addr + (CySRER << index),
1204 readb(base_addr + (CySRER << index)) &
02f1175c 1205 ~CyTxRdy);
ce97a097
JS		 1206 goto done;
1207 }
1208 /* Because the Embedded Transmit Commands have been enabled,
1209 * we must check to see if the escape character, NULL, is being
1210 * sent. If it is, we must ensure that there is room for it to
1211 * be doubled in the output stream. Therefore we no longer
1212 * advance the pointer when the character is fetched, but
1213 * rather wait until after the check for a NULL output
1214 * character. This is necessary because there may not be room
1215 * for the two chars needed to send a NULL.)
1216 */
1217 outch = info->xmit_buf[info->xmit_tail];
1218 if (outch) {
1219 info->xmit_cnt--;
1220 info->xmit_tail = (info->xmit_tail + 1) &
1221 (SERIAL_XMIT_SIZE - 1);
1222 cy_writeb(base_addr + (CyTDR << index), outch);
1223 info->icount.tx++;
1224 } else {
1225 if (char_count > 1) {
02f1175c
JS		 1226 info->xmit_cnt--;
1227 info->xmit_tail = (info->xmit_tail + 1) &
ce97a097 1228 (SERIAL_XMIT_SIZE - 1);
02f1175c 1229 cy_writeb(base_addr + (CyTDR << index), outch);
ce97a097 1230 cy_writeb(base_addr + (CyTDR << index), 0);
02f1175c 1231 info->icount.tx++;
ce97a097 1232 char_count--;
02f1175c 1233 }
e941027f 1234 }
e941027f
JS		 1235 }
1236
ce97a097
JS		 1237done:
1238 tty_wakeup(info->tty);
1239end:
1240 /* end of service */
1241 cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f);
1242 cy_writeb(base_addr + (CyCAR << index), save_car);
1243 spin_unlock(&cinfo->card_lock);
1244}
02f1175c 1245
ce97a097
JS		 1246static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
1247 void __iomem *base_addr)
1248{
1249 struct cyclades_port *info;
1250 int mdm_change, mdm_status;
1251 int save_xir, channel, save_car, index = cinfo->bus_index;
1252
1253 /* determine the channel & change to that context */
1254 spin_lock(&cinfo->card_lock);
1255 save_xir = (u_char) readb(base_addr + (CyMIR << index));
1256 channel = (u_short) (save_xir & CyIRChannel);
1257 info = &cinfo->ports[channel + chip * 4];
1258 save_car = readb(base_addr + (CyCAR << index));
1259 cy_writeb(base_addr + (CyCAR << index), save_xir);
1260
1261 mdm_change = readb(base_addr + (CyMISR << index));
1262 mdm_status = readb(base_addr + (CyMSVR1 << index));
1263
1264 if (!info->tty)
1265 goto end;
1266
1267 if (mdm_change & CyANY_DELTA) {
1268 /* For statistics only */
1269 if (mdm_change & CyDCD)
1270 info->icount.dcd++;
1271 if (mdm_change & CyCTS)
1272 info->icount.cts++;
1273 if (mdm_change & CyDSR)
1274 info->icount.dsr++;
1275 if (mdm_change & CyRI)
1276 info->icount.rng++;
1277
1278 wake_up_interruptible(&info->delta_msr_wait);
1279 }
1280
1281 if ((mdm_change & CyDCD) && (info->flags & ASYNC_CHECK_CD)) {
1282 if (!(mdm_status & CyDCD)) {
1283 tty_hangup(info->tty);
1284 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1285 }
1286 wake_up_interruptible(&info->open_wait);
1287 }
1288 if ((mdm_change & CyCTS) && (info->flags & ASYNC_CTS_FLOW)) {
1289 if (info->tty->hw_stopped) {
1290 if (mdm_status & CyCTS) {
1291 /* cy_start isn't used
1292 because... !!! */
1293 info->tty->hw_stopped = 0;
1294 cy_writeb(base_addr + (CySRER << index),
1295 readb(base_addr + (CySRER << index)) |
1296 CyTxRdy);
1297 tty_wakeup(info->tty);
02f1175c 1298 }
ce97a097
JS		 1299 } else {
1300 if (!(mdm_status & CyCTS)) {
1301 /* cy_stop isn't used
1302 because ... !!! */
1303 info->tty->hw_stopped = 1;
1304 cy_writeb(base_addr + (CySRER << index),
1305 readb(base_addr + (CySRER << index)) &
1306 ~CyTxRdy);
02f1175c 1307 }
e941027f 1308 }
e941027f 1309 }
ce97a097
JS		 1310/* if (mdm_change & CyDSR) {
1311 }
1312 if (mdm_change & CyRI) {
1313 }*/
1314end:
1315 /* end of service */
1316 cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f);
1317 cy_writeb(base_addr + (CyCAR << index), save_car);
1318 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1319}
1320
1da177e4
LT		 1321/* The real interrupt service routine is called
1322 whenever the card wants its hand held--chars
1323 received, out buffer empty, modem change, etc.
1324 */
02f1175c 1325static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1da177e4 1326{
02f1175c 1327 int status;
f7429034 1328 struct cyclades_card *cinfo = dev_id;
02f1175c
JS		 1329 void __iomem *base_addr, *card_base_addr;
1330 int chip;
1331 int index;
1332 int too_many;
1333 int had_work;
1334
f7429034 1335 if (unlikely(cinfo == NULL)) {
1da177e4 1336#ifdef CY_DEBUG_INTERRUPTS
21719191 1337 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",irq);
1da177e4 1338#endif
02f1175c
JS		 1339 return IRQ_NONE; /* spurious interrupt */
1340 }
1341
1342 card_base_addr = cinfo->base_addr;
1343 index = cinfo->bus_index;
1344
f1e83c6c
JS		 1345 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1346 if (unlikely(card_base_addr == NULL))
1347 return IRQ_HANDLED;
1348
02f1175c
JS		 1349 /* This loop checks all chips in the card. Make a note whenever
1350 _any_ chip had some work to do, as this is considered an
1351 indication that there will be more to do. Only when no chip
1352 has any work does this outermost loop exit.
1353 */
1354 do {
1355 had_work = 0;
1356 for (chip = 0; chip < cinfo->num_chips; chip++) {
1357 base_addr = cinfo->base_addr +
1358 (cy_chip_offset[chip] << index);
1359 too_many = 0;
db05c3b1 1360 while ((status = readb(base_addr +
02f1175c
JS		 1361 (CySVRR << index))) != 0x00) {
1362 had_work++;
1363 /* The purpose of the following test is to ensure that
1364 no chip can monopolize the driver. This forces the
1365 chips to be checked in a round-robin fashion (after
1366 draining each of a bunch (1000) of characters).
1367 */
ce97a097 1368 if (1000 < too_many++)
02f1175c 1369 break;
ce97a097
JS		 1370 if (status & CySRReceive) /* rx intr */
1371 cyy_chip_rx(cinfo, chip, base_addr);
1372 if (status & CySRTransmit) /* tx intr */
1373 cyy_chip_tx(cinfo, chip, base_addr);
1374 if (status & CySRModem) /* modem intr */
1375 cyy_chip_modem(cinfo, chip, base_addr);
02f1175c
JS		 1376 }
1377 }
1378 } while (had_work);
1379
1380 /* clear interrupts */
1381 spin_lock(&cinfo->card_lock);
1382 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1383 /* Cy_ClrIntr is 0x1800 */
1384 spin_unlock(&cinfo->card_lock);
1385 return IRQ_HANDLED;
1386} /* cyy_interrupt */
1da177e4
LT		 1387
1388/***********************************************************/
1389/********* End of block of Cyclom-Y specific code **********/
1390/******** Start of block of Cyclades-Z specific code *********/
1391/***********************************************************/
1392
1393static int
02f1175c 1394cyz_fetch_msg(struct cyclades_card *cinfo,
1a86b5e3 1395 __u32 * channel, __u8 * cmd, __u32 * param)
1da177e4 1396{
02f1175c
JS		 1397 struct FIRM_ID __iomem *firm_id;
1398 struct ZFW_CTRL __iomem *zfw_ctrl;
1399 struct BOARD_CTRL __iomem *board_ctrl;
1400 unsigned long loc_doorbell;
1401
1402 firm_id = cinfo->base_addr + ID_ADDRESS;
1403 if (!ISZLOADED(*cinfo)) {
096dcfce 1404 return -1;
02f1175c 1405 }
db05c3b1 1406 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 1407 board_ctrl = &zfw_ctrl->board_ctrl;
1408
db05c3b1 1409 loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
02f1175c
JS		 1410 (cinfo->ctl_addr))->loc_doorbell);
1411 if (loc_doorbell) {
1412 *cmd = (char)(0xff & loc_doorbell);
db05c3b1
JS		 1413 *channel = readl(&board_ctrl->fwcmd_channel);
1414 *param = (__u32) readl(&board_ctrl->fwcmd_param);
02f1175c
JS		 1415 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1416 loc_doorbell, 0xffffffff);
1417 return 1;
1418 }
1419 return 0;
1420} /* cyz_fetch_msg */
1da177e4
LT		 1421
1422static int
02f1175c 1423cyz_issue_cmd(struct cyclades_card *cinfo,
1a86b5e3 1424 __u32 channel, __u8 cmd, __u32 param)
1da177e4 1425{
02f1175c
JS		 1426 struct FIRM_ID __iomem *firm_id;
1427 struct ZFW_CTRL __iomem *zfw_ctrl;
1428 struct BOARD_CTRL __iomem *board_ctrl;
1a86b5e3 1429 __u32 __iomem *pci_doorbell;
02f1175c
JS		 1430 int index;
1431
1432 firm_id = cinfo->base_addr + ID_ADDRESS;
1433 if (!ISZLOADED(*cinfo)) {
096dcfce 1434 return -1;
02f1175c 1435 }
db05c3b1 1436 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 1437 board_ctrl = &zfw_ctrl->board_ctrl;
1438
1439 index = 0;
1440 pci_doorbell =
1441 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
db05c3b1 1442 while ((readl(pci_doorbell) & 0xff) != 0) {
02f1175c 1443 if (index++ == 1000) {
db05c3b1 1444 return (int)(readl(pci_doorbell) & 0xff);
02f1175c
JS		 1445 }
1446 udelay(50L);
1447 }
1448 cy_writel(&board_ctrl->hcmd_channel, channel);
1449 cy_writel(&board_ctrl->hcmd_param, param);
1450 cy_writel(pci_doorbell, (long)cmd);
1451
096dcfce 1452 return 0;
02f1175c 1453} /* cyz_issue_cmd */
1da177e4
LT		 1454
1455static void
ad39c300
JS		 1456cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1457 struct BUF_CTRL __iomem *buf_ctrl)
1da177e4 1458{
875b206b 1459 struct cyclades_card *cinfo = info->card;
02f1175c 1460 struct tty_struct *tty = info->tty;
ad39c300 1461 int char_count;
02f1175c 1462 int len;
1da177e4 1463#ifdef BLOCKMOVE
ce71b0ff 1464 unsigned char *buf;
1da177e4 1465#else
02f1175c 1466 char data;
1da177e4 1467#endif
ad39c300 1468 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1da177e4 1469
db05c3b1
JS		 1470 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1471 rx_put = readl(&buf_ctrl->rx_put);
1472 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1473 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
02f1175c
JS		 1474 if (rx_put >= rx_get)
1475 char_count = rx_put - rx_get;
1476 else
1477 char_count = rx_put - rx_get + rx_bufsize;
1da177e4 1478
02f1175c 1479 if (char_count) {
1da177e4 1480#ifdef CY_ENABLE_MONITORING
02f1175c
JS		 1481 info->mon.int_count++;
1482 info->mon.char_count += char_count;
1483 if (char_count > info->mon.char_max)
1484 info->mon.char_max = char_count;
1485 info->mon.char_last = char_count;
1da177e4 1486#endif
f7429034 1487 if (tty == NULL) {
02f1175c
JS		 1488 /* flush received characters */
1489 new_rx_get = (new_rx_get + char_count) &
1490 (rx_bufsize - 1);
1491 info->rflush_count++;
1492 } else {
1da177e4 1493#ifdef BLOCKMOVE
02f1175c
JS		 1494 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1495 for performance, but because of buffer boundaries, there
1496 may be several steps to the operation */
ce71b0ff
JS		 1497 while (1) {
1498 len = tty_prepare_flip_string(tty, &buf,
1499 char_count);
1500 if (!len)
1501 break;
1502
1503 len = min_t(unsigned int, min(len, char_count),
1504 rx_bufsize - new_rx_get);
1505
1506 memcpy_fromio(buf, cinfo->base_addr +
1507 rx_bufaddr + new_rx_get, len);
1508
1509 new_rx_get = (new_rx_get + len) &
02f1175c 1510 (rx_bufsize - 1);
ce71b0ff
JS		 1511 char_count -= len;
1512 info->icount.rx += len;
1513 info->idle_stats.recv_bytes += len;
02f1175c 1514 }
1da177e4 1515#else
02f1175c
JS		 1516 len = tty_buffer_request_room(tty, char_count);
1517 while (len--) {
db05c3b1 1518 data = readb(cinfo->base_addr + rx_bufaddr +
02f1175c
JS		 1519 new_rx_get);
1520 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1521 tty_insert_flip_char(tty, data, TTY_NORMAL);
1522 info->idle_stats.recv_bytes++;
1523 info->icount.rx++;
1524 }
1da177e4
LT		 1525#endif
1526#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1527 /* Recalculate the number of chars in the RX buffer and issue
1528 a cmd in case it's higher than the RX high water mark */
db05c3b1 1529 rx_put = readl(&buf_ctrl->rx_put);
02f1175c
JS		 1530 if (rx_put >= rx_get)
1531 char_count = rx_put - rx_get;
1532 else
1533 char_count = rx_put - rx_get + rx_bufsize;
ebafeeff
JS		 1534 if (char_count >= (int)readl(&buf_ctrl->rx_threshold) &&
1535 !timer_pending(&cyz_rx_full_timer[
1536 info->line]))
1537 mod_timer(&cyz_rx_full_timer[info->line],
1538 jiffies + 1);
1da177e4 1539#endif
02f1175c
JS		 1540 info->idle_stats.recv_idle = jiffies;
1541 tty_schedule_flip(tty);
1542 }
1543 /* Update rx_get */
1544 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1da177e4 1545 }
1da177e4
LT		 1546}
1547
1548static void
ad39c300
JS		 1549cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1550 struct BUF_CTRL __iomem *buf_ctrl)
1da177e4 1551{
875b206b 1552 struct cyclades_card *cinfo = info->card;
02f1175c
JS		 1553 struct tty_struct *tty = info->tty;
1554 char data;
ad39c300 1555 int char_count;
1da177e4 1556#ifdef BLOCKMOVE
02f1175c 1557 int small_count;
1da177e4 1558#endif
ad39c300 1559 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1da177e4 1560
02f1175c
JS		 1561 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1562 return;
1da177e4 1563
db05c3b1
JS		 1564 tx_get = readl(&buf_ctrl->tx_get);
1565 tx_put = readl(&buf_ctrl->tx_put);
1566 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1567 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
02f1175c
JS		 1568 if (tx_put >= tx_get)
1569 char_count = tx_get - tx_put - 1 + tx_bufsize;
1570 else
1571 char_count = tx_get - tx_put - 1;
1da177e4 1572
02f1175c 1573 if (char_count) {
1da177e4 1574
f7429034 1575 if (tty == NULL)
02f1175c 1576 goto ztxdone;
1da177e4 1577
02f1175c
JS		 1578 if (info->x_char) { /* send special char */
1579 data = info->x_char;
1da177e4 1580
02f1175c
JS		 1581 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1582 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1583 info->x_char = 0;
1584 char_count--;
1585 info->icount.tx++;
02f1175c 1586 }
1da177e4 1587#ifdef BLOCKMOVE
02f1175c
JS		 1588 while (0 < (small_count = min_t(unsigned int,
1589 tx_bufsize - tx_put, min_t(unsigned int,
1590 (SERIAL_XMIT_SIZE - info->xmit_tail),
1591 min_t(unsigned int, info->xmit_cnt,
1592 char_count))))) {
1593
1594 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1595 tx_put),
1596 &info->xmit_buf[info->xmit_tail],
1597 small_count);
1598
1599 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1600 char_count -= small_count;
1601 info->icount.tx += small_count;
1602 info->xmit_cnt -= small_count;
1603 info->xmit_tail = (info->xmit_tail + small_count) &
1604 (SERIAL_XMIT_SIZE - 1);
02f1175c 1605 }
1da177e4 1606#else
02f1175c
JS		 1607 while (info->xmit_cnt && char_count) {
1608 data = info->xmit_buf[info->xmit_tail];
1609 info->xmit_cnt--;
1610 info->xmit_tail = (info->xmit_tail + 1) &
1611 (SERIAL_XMIT_SIZE - 1);
1612
1613 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1614 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1615 char_count--;
1616 info->icount.tx++;
02f1175c 1617 }
1da177e4 1618#endif
02f1175c 1619ztxdone:
ebafeeff 1620 tty_wakeup(tty);
02f1175c
JS		 1621 /* Update tx_put */
1622 cy_writel(&buf_ctrl->tx_put, tx_put);
1da177e4 1623 }
1da177e4
LT		 1624}
1625
02f1175c 1626static void cyz_handle_cmd(struct cyclades_card *cinfo)
1da177e4 1627{
02f1175c
JS		 1628 struct tty_struct *tty;
1629 struct cyclades_port *info;
ad39c300
JS		 1630 static struct FIRM_ID __iomem *firm_id;
1631 static struct ZFW_CTRL __iomem *zfw_ctrl;
1632 static struct BOARD_CTRL __iomem *board_ctrl;
1633 static struct CH_CTRL __iomem *ch_ctrl;
1634 static struct BUF_CTRL __iomem *buf_ctrl;
1a86b5e3
KK		 1635 __u32 channel;
1636 __u8 cmd;
1637 __u32 param;
1638 __u32 hw_ver, fw_ver;
02f1175c
JS		 1639 int special_count;
1640 int delta_count;
1641
1642 firm_id = cinfo->base_addr + ID_ADDRESS;
db05c3b1 1643 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 1644 board_ctrl = &zfw_ctrl->board_ctrl;
db05c3b1
JS		 1645 fw_ver = readl(&board_ctrl->fw_version);
1646 hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
02f1175c
JS		 1647 mail_box_0);
1648
1649 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1650 special_count = 0;
1651 delta_count = 0;
dd025c0c 1652 info = &cinfo->ports[channel];
f7429034 1653 if ((tty = info->tty) == NULL)
02f1175c 1654 continue;
f7429034 1655
02f1175c
JS		 1656 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1657 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1658
1659 switch (cmd) {
1660 case C_CM_PR_ERROR:
1661 tty_insert_flip_char(tty, 0, TTY_PARITY);
1662 info->icount.rx++;
1663 special_count++;
1664 break;
1665 case C_CM_FR_ERROR:
1666 tty_insert_flip_char(tty, 0, TTY_FRAME);
1667 info->icount.rx++;
1668 special_count++;
1669 break;
1670 case C_CM_RXBRK:
1671 tty_insert_flip_char(tty, 0, TTY_BREAK);
1672 info->icount.rx++;
1673 special_count++;
1674 break;
1675 case C_CM_MDCD:
1676 info->icount.dcd++;
1677 delta_count++;
1678 if (info->flags & ASYNC_CHECK_CD) {
1679 if ((fw_ver > 241 ? ((u_long) param) :
db05c3b1 1680 readl(&ch_ctrl->rs_status)) &
02f1175c 1681 C_RS_DCD) {
ebafeeff 1682 wake_up_interruptible(&info->open_wait);
02f1175c 1683 } else {
ebafeeff
JS		 1684 tty_hangup(info->tty);
1685 wake_up_interruptible(&info->open_wait);
1686 info->flags &= ~ASYNC_NORMAL_ACTIVE;
02f1175c
JS		 1687 }
1688 }
1689 break;
1690 case C_CM_MCTS:
1691 info->icount.cts++;
1692 delta_count++;
1693 break;
1694 case C_CM_MRI:
1695 info->icount.rng++;
1696 delta_count++;
1697 break;
1698 case C_CM_MDSR:
1699 info->icount.dsr++;
1700 delta_count++;
1701 break;
1da177e4 1702#ifdef Z_WAKE
02f1175c 1703 case C_CM_IOCTLW:
ebafeeff 1704 complete(&info->shutdown_wait);
02f1175c 1705 break;
1da177e4
LT		 1706#endif
1707#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1708 case C_CM_RXHIWM:
1709 case C_CM_RXNNDT:
1710 case C_CM_INTBACK2:
1711 /* Reception Interrupt */
1da177e4 1712#ifdef CY_DEBUG_INTERRUPTS
21719191
JS		 1713 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1714 "port %ld\n", info->card, channel);
1da177e4 1715#endif
02f1175c
JS		 1716 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1717 break;
1718 case C_CM_TXBEMPTY:
1719 case C_CM_TXLOWWM:
1720 case C_CM_INTBACK:
1721 /* Transmission Interrupt */
1da177e4 1722#ifdef CY_DEBUG_INTERRUPTS
21719191
JS		 1723 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1724 "port %ld\n", info->card, channel);
1da177e4 1725#endif
02f1175c
JS		 1726 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1727 break;
1728#endif /* CONFIG_CYZ_INTR */
1729 case C_CM_FATAL:
1730 /* should do something with this !!! */
1731 break;
1732 default:
1733 break;
1734 }
1735 if (delta_count)
ebafeeff 1736 wake_up_interruptible(&info->delta_msr_wait);
02f1175c
JS		 1737 if (special_count)
1738 tty_schedule_flip(tty);
1da177e4 1739 }
1da177e4
LT		 1740}
1741
1742#ifdef CONFIG_CYZ_INTR
02f1175c 1743static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1da177e4 1744{
f7429034 1745 struct cyclades_card *cinfo = dev_id;
1da177e4 1746
f7429034 1747 if (unlikely(cinfo == NULL)) {
1da177e4 1748#ifdef CY_DEBUG_INTERRUPTS
21719191 1749 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",irq);
1da177e4 1750#endif
02f1175c
JS		 1751 return IRQ_NONE; /* spurious interrupt */
1752 }
1da177e4 1753
f7429034 1754 if (unlikely(!ISZLOADED(*cinfo))) {
1da177e4 1755#ifdef CY_DEBUG_INTERRUPTS
21719191
JS		 1756 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1757 "(IRQ%d).\n", irq);
1da177e4 1758#endif
02f1175c
JS		 1759 return IRQ_NONE;
1760 }
1da177e4 1761
02f1175c
JS		 1762 /* Handle the interrupts */
1763 cyz_handle_cmd(cinfo);
1da177e4 1764
02f1175c
JS		 1765 return IRQ_HANDLED;
1766} /* cyz_interrupt */
1da177e4 1767
02f1175c 1768static void cyz_rx_restart(unsigned long arg)
1da177e4 1769{
02f1175c 1770 struct cyclades_port *info = (struct cyclades_port *)arg;
875b206b 1771 struct cyclades_card *card = info->card;
02f1175c 1772 int retval;
875b206b 1773 __u32 channel = info->line - card->first_line;
02f1175c
JS		 1774 unsigned long flags;
1775
9fa1b3b1 1776 spin_lock_irqsave(&card->card_lock, flags);
875b206b 1777 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
02f1175c 1778 if (retval != 0) {
21719191 1779 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
02f1175c
JS		 1780 info->line, retval);
1781 }
9fa1b3b1 1782 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4
LT		 1783}
1784
02f1175c 1785#else /* CONFIG_CYZ_INTR */
1da177e4 1786
02f1175c 1787static void cyz_poll(unsigned long arg)
1da177e4 1788{
02f1175c
JS		 1789 struct cyclades_card *cinfo;
1790 struct cyclades_port *info;
1791 struct tty_struct *tty;
c4923b4f
JS		 1792 struct FIRM_ID __iomem *firm_id;
1793 struct ZFW_CTRL __iomem *zfw_ctrl;
1794 struct BOARD_CTRL __iomem *board_ctrl;
1795 struct CH_CTRL __iomem *ch_ctrl;
1796 struct BUF_CTRL __iomem *buf_ctrl;
b7050906 1797 unsigned long expires = jiffies + HZ;
02f1175c 1798 int card, port;
1da177e4 1799
02f1175c
JS		 1800 for (card = 0; card < NR_CARDS; card++) {
1801 cinfo = &cy_card[card];
1802
1803 if (!IS_CYC_Z(*cinfo))
1804 continue;
1805 if (!ISZLOADED(*cinfo))
1806 continue;
1807
1808 firm_id = cinfo->base_addr + ID_ADDRESS;
1809 zfw_ctrl = cinfo->base_addr +
db05c3b1 1810 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 1811 board_ctrl = &(zfw_ctrl->board_ctrl);
1da177e4
LT		 1812
1813 /* Skip first polling cycle to avoid racing conditions with the FW */
02f1175c 1814 if (!cinfo->intr_enabled) {
db05c3b1 1815 cinfo->nports = (int)readl(&board_ctrl->n_channel);
02f1175c
JS		 1816 cinfo->intr_enabled = 1;
1817 continue;
1818 }
1da177e4 1819
02f1175c 1820 cyz_handle_cmd(cinfo);
1da177e4 1821
02f1175c 1822 for (port = 0; port < cinfo->nports; port++) {
dd025c0c 1823 info = &cinfo->ports[port];
02f1175c
JS		 1824 tty = info->tty;
1825 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1826 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1da177e4 1827
02f1175c
JS		 1828 if (!info->throttle)
1829 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1830 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1831 }
1832 /* poll every 'cyz_polling_cycle' period */
b7050906 1833 expires = jiffies + cyz_polling_cycle;
1da177e4 1834 }
b7050906 1835 mod_timer(&cyz_timerlist, expires);
02f1175c 1836} /* cyz_poll */
1da177e4 1837
02f1175c 1838#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 1839
1840/********** End of block of Cyclades-Z specific code *********/
1841/***********************************************************/
1842
1da177e4
LT		 1843/* This is called whenever a port becomes active;
1844 interrupts are enabled and DTR & RTS are turned on.
1845 */
02f1175c 1846static int startup(struct cyclades_port *info)
1da177e4 1847{
875b206b 1848 struct cyclades_card *card;
02f1175c
JS		 1849 unsigned long flags;
1850 int retval = 0;
1851 void __iomem *base_addr;
875b206b 1852 int chip, channel, index;
02f1175c 1853 unsigned long page;
1da177e4 1854
02f1175c 1855 card = info->card;
875b206b 1856 channel = info->line - card->first_line;
1da177e4 1857
02f1175c
JS		 1858 page = get_zeroed_page(GFP_KERNEL);
1859 if (!page)
1860 return -ENOMEM;
1da177e4 1861
9fa1b3b1 1862 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1863
02f1175c
JS		 1864 if (info->flags & ASYNC_INITIALIZED) {
1865 free_page(page);
1866 goto errout;
1867 }
1da177e4 1868
02f1175c
JS		 1869 if (!info->type) {
1870 if (info->tty) {
1871 set_bit(TTY_IO_ERROR, &info->tty->flags);
1872 }
1873 free_page(page);
1874 goto errout;
1875 }
1da177e4 1876
02f1175c
JS		 1877 if (info->xmit_buf)
1878 free_page(page);
1879 else
1880 info->xmit_buf = (unsigned char *)page;
1da177e4 1881
9fa1b3b1 1882 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 1883
02f1175c 1884 set_line_char(info);
1da177e4 1885
875b206b 1886 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 1887 chip = channel >> 2;
1888 channel &= 0x03;
875b206b
JS		 1889 index = card->bus_index;
1890 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4
LT		 1891
1892#ifdef CY_DEBUG_OPEN
21719191
JS		 1893 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1894 "base_addr %p\n",
1895 card, chip, channel, base_addr);
1da177e4 1896#endif
9fa1b3b1 1897 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1898
02f1175c 1899 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1da177e4 1900
02f1175c
JS		 1901 cy_writeb(base_addr + (CyRTPR << index),
1902 (info->default_timeout ? info->default_timeout : 0x02));
1903 /* 10ms rx timeout */
1da177e4 1904
02f1175c
JS		 1905 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1906 index);
1da177e4 1907
02f1175c
JS		 1908 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1909 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1910 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1da177e4
LT		 1911
1912#ifdef CY_DEBUG_DTR
21719191
JS		 1913 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1914 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 1915 readb(base_addr + (CyMSVR1 << index)),
1916 readb(base_addr + (CyMSVR2 << index)));
1da177e4
LT		 1917#endif
1918
02f1175c 1919 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1920 readb(base_addr + (CySRER << index)) | CyRxData);
02f1175c 1921 info->flags |= ASYNC_INITIALIZED;
1da177e4 1922
02f1175c
JS		 1923 if (info->tty) {
1924 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1925 }
1926 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1927 info->breakon = info->breakoff = 0;
1928 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1929 info->idle_stats.in_use =
1930 info->idle_stats.recv_idle =
1931 info->idle_stats.xmit_idle = jiffies;
1da177e4 1932
9fa1b3b1 1933 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 1934
02f1175c
JS		 1935 } else {
1936 struct FIRM_ID __iomem *firm_id;
1937 struct ZFW_CTRL __iomem *zfw_ctrl;
1938 struct BOARD_CTRL __iomem *board_ctrl;
1939 struct CH_CTRL __iomem *ch_ctrl;
1da177e4 1940
875b206b 1941 base_addr = card->base_addr;
1da177e4 1942
02f1175c 1943 firm_id = base_addr + ID_ADDRESS;
875b206b 1944 if (!ISZLOADED(*card)) {
02f1175c
JS		 1945 return -ENODEV;
1946 }
1da177e4 1947
875b206b 1948 zfw_ctrl = card->base_addr +
db05c3b1 1949 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 1950 board_ctrl = &zfw_ctrl->board_ctrl;
1951 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4
LT		 1952
1953#ifdef CY_DEBUG_OPEN
21719191
JS		 1954 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1955 "base_addr %p\n", card, channel, base_addr);
1da177e4 1956#endif
9fa1b3b1 1957 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1958
02f1175c 1959 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1da177e4
LT		 1960#ifdef Z_WAKE
1961#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1962 cy_writel(&ch_ctrl[channel].intr_enable,
1963 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1964 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1da177e4 1965#else
02f1175c
JS		 1966 cy_writel(&ch_ctrl[channel].intr_enable,
1967 C_IN_IOCTLW | C_IN_MDCD);
1968#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 1969#else
1970#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1971 cy_writel(&ch_ctrl[channel].intr_enable,
1972 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1973 C_IN_RXNNDT | C_IN_MDCD);
1da177e4 1974#else
02f1175c
JS		 1975 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
1976#endif /* CONFIG_CYZ_INTR */
1977#endif /* Z_WAKE */
1978
875b206b 1979 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
02f1175c 1980 if (retval != 0) {
21719191
JS		 1981 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1982 "%x\n", info->line, retval);
02f1175c 1983 }
1da177e4 1984
02f1175c 1985 /* Flush RX buffers before raising DTR and RTS */
875b206b 1986 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
02f1175c 1987 if (retval != 0) {
21719191
JS		 1988 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1989 "%x\n", info->line, retval);
02f1175c 1990 }
1da177e4 1991
02f1175c
JS		 1992 /* set timeout !!! */
1993 /* set RTS and DTR !!! */
1994 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1 1995 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
02f1175c 1996 C_RS_DTR);
9fa1b3b1 1997 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
02f1175c 1998 if (retval != 0) {
21719191
JS		 1999 printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
2000 "%x\n", info->line, retval);
02f1175c 2001 }
1da177e4 2002#ifdef CY_DEBUG_DTR
21719191 2003 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
1da177e4
LT		 2004#endif
2005
02f1175c
JS		 2006 /* enable send, recv, modem !!! */
2007
2008 info->flags |= ASYNC_INITIALIZED;
2009 if (info->tty) {
2010 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2011 }
2012 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2013 info->breakon = info->breakoff = 0;
2014 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2015 info->idle_stats.in_use =
2016 info->idle_stats.recv_idle =
2017 info->idle_stats.xmit_idle = jiffies;
1da177e4 2018
9fa1b3b1 2019 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 2020 }
1da177e4
LT		 2021
2022#ifdef CY_DEBUG_OPEN
21719191 2023 printk(KERN_DEBUG "cyc startup done\n");
1da177e4
LT		 2024#endif
2025 return 0;
2026
2027errout:
9fa1b3b1 2028 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 2029 return retval;
02f1175c 2030} /* startup */
1da177e4 2031
02f1175c 2032static void start_xmit(struct cyclades_port *info)
1da177e4 2033{
875b206b 2034 struct cyclades_card *card;
02f1175c
JS		 2035 unsigned long flags;
2036 void __iomem *base_addr;
875b206b 2037 int chip, channel, index;
1da177e4 2038
02f1175c 2039 card = info->card;
875b206b
JS		 2040 channel = info->line - card->first_line;
2041 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 2042 chip = channel >> 2;
2043 channel &= 0x03;
875b206b
JS		 2044 index = card->bus_index;
2045 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 2046
9fa1b3b1 2047 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2048 cy_writeb(base_addr + (CyCAR << index), channel);
2049 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2050 readb(base_addr + (CySRER << index)) | CyTxRdy);
9fa1b3b1 2051 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2052 } else {
1da177e4 2053#ifdef CONFIG_CYZ_INTR
02f1175c 2054 int retval;
1da177e4 2055
9fa1b3b1 2056 spin_lock_irqsave(&card->card_lock, flags);
875b206b 2057 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
02f1175c 2058 if (retval != 0) {
21719191
JS		 2059 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2060 "%x\n", info->line, retval);
02f1175c 2061 }
9fa1b3b1 2062 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2063#else /* CONFIG_CYZ_INTR */
2064 /* Don't have to do anything at this time */
2065#endif /* CONFIG_CYZ_INTR */
2066 }
2067} /* start_xmit */
1da177e4
LT		 2068
2069/*
2070 * This routine shuts down a serial port; interrupts are disabled,
2071 * and DTR is dropped if the hangup on close termio flag is on.
2072 */
02f1175c 2073static void shutdown(struct cyclades_port *info)
1da177e4 2074{
875b206b 2075 struct cyclades_card *card;
02f1175c
JS		 2076 unsigned long flags;
2077 void __iomem *base_addr;
875b206b 2078 int chip, channel, index;
02f1175c
JS		 2079
2080 if (!(info->flags & ASYNC_INITIALIZED)) {
2081 return;
2082 }
2083
2084 card = info->card;
875b206b
JS		 2085 channel = info->line - card->first_line;
2086 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 2087 chip = channel >> 2;
2088 channel &= 0x03;
875b206b
JS		 2089 index = card->bus_index;
2090 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4
LT		 2091
2092#ifdef CY_DEBUG_OPEN
21719191
JS		 2093 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2094 "channel %d, base_addr %p\n",
2095 card, chip, channel, base_addr);
1da177e4
LT		 2096#endif
2097
9fa1b3b1 2098 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2099
2100 /* Clear delta_msr_wait queue to avoid mem leaks. */
2101 wake_up_interruptible(&info->delta_msr_wait);
1da177e4 2102
02f1175c
JS		 2103 if (info->xmit_buf) {
2104 unsigned char *temp;
2105 temp = info->xmit_buf;
2106 info->xmit_buf = NULL;
2107 free_page((unsigned long)temp);
2108 }
2109 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2110 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2111 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2112 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
1da177e4 2113#ifdef CY_DEBUG_DTR
21719191
JS		 2114 printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2115 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 2116 readb(base_addr + (CyMSVR1 << index)),
2117 readb(base_addr + (CyMSVR2 << index)));
1da177e4 2118#endif
02f1175c
JS		 2119 }
2120 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2121 /* it may be appropriate to clear _XMIT at
2122 some later date (after testing)!!! */
2123
2124 if (info->tty) {
2125 set_bit(TTY_IO_ERROR, &info->tty->flags);
2126 }
2127 info->flags &= ~ASYNC_INITIALIZED;
9fa1b3b1 2128 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2129 } else {
2130 struct FIRM_ID __iomem *firm_id;
2131 struct ZFW_CTRL __iomem *zfw_ctrl;
2132 struct BOARD_CTRL __iomem *board_ctrl;
2133 struct CH_CTRL __iomem *ch_ctrl;
2134 int retval;
2135
875b206b 2136 base_addr = card->base_addr;
1da177e4 2137#ifdef CY_DEBUG_OPEN
21719191
JS		 2138 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2139 "base_addr %p\n", card, channel, base_addr);
1da177e4
LT		 2140#endif
2141
02f1175c 2142 firm_id = base_addr + ID_ADDRESS;
875b206b 2143 if (!ISZLOADED(*card)) {
02f1175c
JS		 2144 return;
2145 }
1da177e4 2146
875b206b 2147 zfw_ctrl = card->base_addr +
db05c3b1 2148 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2149 board_ctrl = &zfw_ctrl->board_ctrl;
2150 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4 2151
9fa1b3b1 2152 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 2153
02f1175c
JS		 2154 if (info->xmit_buf) {
2155 unsigned char *temp;
2156 temp = info->xmit_buf;
2157 info->xmit_buf = NULL;
2158 free_page((unsigned long)temp);
1da177e4 2159 }
02f1175c
JS		 2160
2161 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2162 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1 2163 (__u32)(readl(&ch_ctrl[channel].rs_control) &
02f1175c 2164 ~(C_RS_RTS | C_RS_DTR)));
875b206b 2165 retval = cyz_issue_cmd(info->card, channel,
02f1175c
JS		 2166 C_CM_IOCTLM, 0L);
2167 if (retval != 0) {
21719191
JS		 2168 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2169 "was %x\n", info->line, retval);
02f1175c 2170 }
1da177e4 2171#ifdef CY_DEBUG_DTR
21719191 2172 printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
1da177e4 2173#endif
02f1175c 2174 }
1da177e4 2175
02f1175c
JS		 2176 if (info->tty) {
2177 set_bit(TTY_IO_ERROR, &info->tty->flags);
2178 }
2179 info->flags &= ~ASYNC_INITIALIZED;
2180
9fa1b3b1 2181 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2182 }
1da177e4
LT		 2183
2184#ifdef CY_DEBUG_OPEN
21719191 2185 printk(KERN_DEBUG "cyc shutdown done\n");
1da177e4 2186#endif
02f1175c 2187} /* shutdown */
1da177e4
LT		 2188
2189/*
2190 * ------------------------------------------------------------
2191 * cy_open() and friends
2192 * ------------------------------------------------------------
2193 */
2194
2195static int
02f1175c
JS		 2196block_til_ready(struct tty_struct *tty, struct file *filp,
2197 struct cyclades_port *info)
1da177e4 2198{
02f1175c
JS		 2199 DECLARE_WAITQUEUE(wait, current);
2200 struct cyclades_card *cinfo;
2201 unsigned long flags;
2202 int chip, channel, index;
2203 int retval;
2204 void __iomem *base_addr;
2205
875b206b 2206 cinfo = info->card;
02f1175c
JS		 2207 channel = info->line - cinfo->first_line;
2208
2209 /*
2210 * If the device is in the middle of being closed, then block
2211 * until it's done, and then try again.
2212 */
2213 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2c7fea99
JS		 2214 wait_event_interruptible(info->close_wait,
2215 !(info->flags & ASYNC_CLOSING));
096dcfce 2216 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
1da177e4 2217 }
02f1175c
JS		 2218
2219 /*
2220 * If non-blocking mode is set, then make the check up front
2221 * and then exit.
2222 */
2223 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2224 info->flags |= ASYNC_NORMAL_ACTIVE;
2225 return 0;
2226 }
2227
2228 /*
2229 * Block waiting for the carrier detect and the line to become
2230 * free (i.e., not in use by the callout). While we are in
2231 * this loop, info->count is dropped by one, so that
2232 * cy_close() knows when to free things. We restore it upon
2233 * exit, either normal or abnormal.
2234 */
2235 retval = 0;
2236 add_wait_queue(&info->open_wait, &wait);
1da177e4 2237#ifdef CY_DEBUG_OPEN
21719191
JS		 2238 printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2239 "count = %d\n", info->line, info->count);
1da177e4 2240#endif
9fa1b3b1 2241 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 2242 if (!tty_hung_up_p(filp))
2243 info->count--;
9fa1b3b1 2244 spin_unlock_irqrestore(&cinfo->card_lock, flags);
1da177e4 2245#ifdef CY_DEBUG_COUNT
21719191
JS		 2246 printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2247 "%d\n", current->pid, info->count);
1da177e4 2248#endif
02f1175c
JS		 2249 info->blocked_open++;
2250
2251 if (!IS_CYC_Z(*cinfo)) {
2252 chip = channel >> 2;
2253 channel &= 0x03;
2254 index = cinfo->bus_index;
2255 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2256
2257 while (1) {
9fa1b3b1 2258 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 2259 if ((tty->termios->c_cflag & CBAUD)) {
2260 cy_writeb(base_addr + (CyCAR << index),
2261 (u_char) channel);
2262 cy_writeb(base_addr + (CyMSVR1 << index),
2263 CyRTS);
2264 cy_writeb(base_addr + (CyMSVR2 << index),
2265 CyDTR);
1da177e4 2266#ifdef CY_DEBUG_DTR
21719191
JS		 2267 printk(KERN_DEBUG "cyc:block_til_ready raising "
2268 "DTR\n");
2269 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 2270 readb(base_addr + (CyMSVR1 << index)),
2271 readb(base_addr + (CyMSVR2 << index)));
1da177e4 2272#endif
02f1175c 2273 }
9fa1b3b1 2274 spin_unlock_irqrestore(&cinfo->card_lock, flags);
1da177e4 2275
02f1175c
JS		 2276 set_current_state(TASK_INTERRUPTIBLE);
2277 if (tty_hung_up_p(filp) ||
2278 !(info->flags & ASYNC_INITIALIZED)) {
2279 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2280 -EAGAIN : -ERESTARTSYS);
2281 break;
2282 }
1da177e4 2283
9fa1b3b1 2284 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 2285 cy_writeb(base_addr + (CyCAR << index),
2286 (u_char) channel);
2287 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
db05c3b1 2288 (readb(base_addr +
02f1175c 2289 (CyMSVR1 << index)) & CyDCD))) {
9fa1b3b1 2290 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c
JS		 2291 break;
2292 }
9fa1b3b1 2293 spin_unlock_irqrestore(&cinfo->card_lock, flags);
1da177e4 2294
02f1175c
JS		 2295 if (signal_pending(current)) {
2296 retval = -ERESTARTSYS;
2297 break;
2298 }
1da177e4 2299#ifdef CY_DEBUG_OPEN
21719191
JS		 2300 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2301 "ttyC%d, count = %d\n",
2302 info->line, info->count);
1da177e4 2303#endif
02f1175c 2304 schedule();
1da177e4 2305 }
02f1175c
JS		 2306 } else {
2307 struct FIRM_ID __iomem *firm_id;
2308 struct ZFW_CTRL __iomem *zfw_ctrl;
2309 struct BOARD_CTRL __iomem *board_ctrl;
2310 struct CH_CTRL __iomem *ch_ctrl;
02f1175c
JS		 2311
2312 base_addr = cinfo->base_addr;
2313 firm_id = base_addr + ID_ADDRESS;
2314 if (!ISZLOADED(*cinfo)) {
cc0a8fbb 2315 __set_current_state(TASK_RUNNING);
02f1175c
JS		 2316 remove_wait_queue(&info->open_wait, &wait);
2317 return -EINVAL;
2318 }
2319
db05c3b1 2320 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
02f1175c
JS		 2321 board_ctrl = &zfw_ctrl->board_ctrl;
2322 ch_ctrl = zfw_ctrl->ch_ctrl;
2323
2324 while (1) {
2325 if ((tty->termios->c_cflag & CBAUD)) {
2326 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 2327 readl(&ch_ctrl[channel].rs_control) |
2328 C_RS_RTS | C_RS_DTR);
9fa1b3b1 2329 retval = cyz_issue_cmd(cinfo,
db05c3b1 2330 channel, C_CM_IOCTLM, 0L);
02f1175c 2331 if (retval != 0) {
21719191
JS		 2332 printk(KERN_ERR "cyc:block_til_ready "
2333 "retval on ttyC%d was %x\n",
02f1175c
JS		 2334 info->line, retval);
2335 }
1da177e4 2336#ifdef CY_DEBUG_DTR
21719191
JS		 2337 printk(KERN_DEBUG "cyc:block_til_ready raising "
2338 "Z DTR\n");
1da177e4 2339#endif
02f1175c 2340 }
1da177e4 2341
02f1175c
JS		 2342 set_current_state(TASK_INTERRUPTIBLE);
2343 if (tty_hung_up_p(filp) ||
2344 !(info->flags & ASYNC_INITIALIZED)) {
2345 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2346 -EAGAIN : -ERESTARTSYS);
2347 break;
2348 }
2349 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
db05c3b1 2350 (readl(&ch_ctrl[channel].rs_status) &
02f1175c
JS		 2351 C_RS_DCD))) {
2352 break;
2353 }
2354 if (signal_pending(current)) {
2355 retval = -ERESTARTSYS;
2356 break;
2357 }
1da177e4 2358#ifdef CY_DEBUG_OPEN
21719191
JS		 2359 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2360 "ttyC%d, count = %d\n",
2361 info->line, info->count);
1da177e4 2362#endif
02f1175c
JS		 2363 schedule();
2364 }
1da177e4 2365 }
cc0a8fbb 2366 __set_current_state(TASK_RUNNING);
02f1175c
JS		 2367 remove_wait_queue(&info->open_wait, &wait);
2368 if (!tty_hung_up_p(filp)) {
2369 info->count++;
1da177e4 2370#ifdef CY_DEBUG_COUNT
21719191
JS		 2371 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2372 "count to %d\n", current->pid, info->count);
1da177e4 2373#endif
02f1175c
JS		 2374 }
2375 info->blocked_open--;
1da177e4 2376#ifdef CY_DEBUG_OPEN
21719191
JS		 2377 printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2378 "count = %d\n", info->line, info->count);
1da177e4 2379#endif
02f1175c
JS		 2380 if (retval)
2381 return retval;
2382 info->flags |= ASYNC_NORMAL_ACTIVE;
2383 return 0;
2384} /* block_til_ready */
1da177e4
LT		 2385
2386/*
2387 * This routine is called whenever a serial port is opened. It
2388 * performs the serial-specific initialization for the tty structure.
2389 */
02f1175c 2390static int cy_open(struct tty_struct *tty, struct file *filp)
1da177e4 2391{
02f1175c 2392 struct cyclades_port *info;
dd025c0c 2393 unsigned int i;
02f1175c 2394 int retval, line;
1da177e4 2395
02f1175c
JS		 2396 line = tty->index;
2397 if ((line < 0) || (NR_PORTS <= line)) {
2398 return -ENODEV;
2399 }
dd025c0c
JS		 2400 for (i = 0; i < NR_CARDS; i++)
2401 if (line < cy_card[i].first_line + cy_card[i].nports &&
2402 line >= cy_card[i].first_line)
2403 break;
2404 if (i >= NR_CARDS)
2405 return -ENODEV;
2406 info = &cy_card[i].ports[line - cy_card[i].first_line];
02f1175c
JS		 2407 if (info->line < 0) {
2408 return -ENODEV;
2409 }
1da177e4 2410
02f1175c
JS		 2411 /* If the card's firmware hasn't been loaded,
2412 treat it as absent from the system. This
2413 will make the user pay attention.
2414 */
875b206b
JS		 2415 if (IS_CYC_Z(*info->card)) {
2416 struct cyclades_card *cinfo = info->card;
02f1175c
JS		 2417 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2418
2419 if (!ISZLOADED(*cinfo)) {
db05c3b1 2420 if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
02f1175c
JS		 2421 (cinfo->ctl_addr))->mail_box_0)) &&
2422 Z_FPGA_CHECK(*cinfo)) &&
db05c3b1 2423 (ZFIRM_HLT == readl(
02f1175c 2424 &firm_id->signature))) {
21719191
JS		 2425 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2426 "need an external power supply for "
2427 "this number of ports.\nFirmware "
2428 "halted.\n");
02f1175c 2429 } else {
21719191
JS		 2430 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2431 "yet loaded\n");
02f1175c
JS		 2432 }
2433 return -ENODEV;
2434 }
2435#ifdef CONFIG_CYZ_INTR
2436 else {
2437 /* In case this Z board is operating in interrupt mode, its
2438 interrupts should be enabled as soon as the first open
2439 happens to one of its ports. */
2440 if (!cinfo->intr_enabled) {
2441 struct ZFW_CTRL __iomem *zfw_ctrl;
2442 struct BOARD_CTRL __iomem *board_ctrl;
2443
2444 zfw_ctrl = cinfo->base_addr +
db05c3b1
JS		 2445 (readl(&firm_id->zfwctrl_addr) &
2446 0xfffff);
02f1175c
JS		 2447
2448 board_ctrl = &zfw_ctrl->board_ctrl;
2449
2450 /* Enable interrupts on the PLX chip */
2451 cy_writew(cinfo->ctl_addr + 0x68,
db05c3b1 2452 readw(cinfo->ctl_addr + 0x68) | 0x0900);
02f1175c
JS		 2453 /* Enable interrupts on the FW */
2454 retval = cyz_issue_cmd(cinfo, 0,
2455 C_CM_IRQ_ENBL, 0L);
2456 if (retval != 0) {
21719191
JS		 2457 printk(KERN_ERR "cyc:IRQ enable retval "
2458 "was %x\n", retval);
02f1175c
JS		 2459 }
2460 cinfo->nports =
db05c3b1 2461 (int)readl(&board_ctrl->n_channel);
02f1175c
JS		 2462 cinfo->intr_enabled = 1;
2463 }
1da177e4 2464 }
02f1175c
JS		 2465#endif /* CONFIG_CYZ_INTR */
2466 /* Make sure this Z port really exists in hardware */
2467 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2468 return -ENODEV;
1da177e4 2469 }
1da177e4 2470#ifdef CY_DEBUG_OTHER
21719191 2471 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
1da177e4 2472#endif
02f1175c
JS		 2473 tty->driver_data = info;
2474 info->tty = tty;
2475 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2476 return -ENODEV;
2477 }
1da177e4 2478#ifdef CY_DEBUG_OPEN
21719191
JS		 2479 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2480 info->count);
1da177e4 2481#endif
02f1175c 2482 info->count++;
1da177e4 2483#ifdef CY_DEBUG_COUNT
21719191 2484 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
02f1175c 2485 current->pid, info->count);
1da177e4 2486#endif
1da177e4 2487
02f1175c
JS		 2488 /*
2489 * If the port is the middle of closing, bail out now
2490 */
2491 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2c7fea99
JS		 2492 wait_event_interruptible(info->close_wait,
2493 !(info->flags & ASYNC_CLOSING));
096dcfce 2494 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
02f1175c 2495 }
1da177e4 2496
02f1175c
JS		 2497 /*
2498 * Start up serial port
2499 */
2500 retval = startup(info);
2501 if (retval) {
2502 return retval;
2503 }
1da177e4 2504
02f1175c
JS		 2505 retval = block_til_ready(tty, filp, info);
2506 if (retval) {
1da177e4 2507#ifdef CY_DEBUG_OPEN
21719191
JS		 2508 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2509 "with %d\n", retval);
1da177e4 2510#endif
02f1175c
JS		 2511 return retval;
2512 }
1da177e4 2513
02f1175c 2514 info->throttle = 0;
1da177e4 2515
02f1175c 2516#ifdef CY_DEBUG_OPEN
21719191 2517 printk(KERN_DEBUG "cyc:cy_open done\n");
02f1175c
JS		 2518#endif
2519 return 0;
2520} /* cy_open */
1da177e4
LT		 2521
2522/*
2523 * cy_wait_until_sent() --- wait until the transmitter is empty
2524 */
02f1175c 2525static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
1da177e4 2526{
875b206b 2527 struct cyclades_card *card;
cab9bdd1 2528 struct cyclades_port *info = tty->driver_data;
02f1175c 2529 void __iomem *base_addr;
875b206b 2530 int chip, channel, index;
02f1175c
JS		 2531 unsigned long orig_jiffies;
2532 int char_time;
2533
2534 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2535 return;
2536
2537 if (info->xmit_fifo_size == 0)
2538 return; /* Just in case.... */
1da177e4 2539
02f1175c
JS		 2540 orig_jiffies = jiffies;
2541 /*
2542 * Set the check interval to be 1/5 of the estimated time to
2543 * send a single character, and make it at least 1. The check
2544 * interval should also be less than the timeout.
2545 *
2546 * Note: we have to use pretty tight timings here to satisfy
2547 * the NIST-PCTS.
2548 */
2549 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2550 char_time = char_time / 5;
2551 if (char_time <= 0)
2552 char_time = 1;
2553 if (timeout < 0)
2554 timeout = 0;
2555 if (timeout)
2556 char_time = min(char_time, timeout);
2557 /*
2558 * If the transmitter hasn't cleared in twice the approximate
2559 * amount of time to send the entire FIFO, it probably won't
2560 * ever clear. This assumes the UART isn't doing flow
2561 * control, which is currently the case. Hence, if it ever
2562 * takes longer than info->timeout, this is probably due to a
2563 * UART bug of some kind. So, we clamp the timeout parameter at
2564 * 2*info->timeout.
2565 */
2566 if (!timeout || timeout > 2 * info->timeout)
2567 timeout = 2 * info->timeout;
1da177e4 2568#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191
JS		 2569 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2570 timeout, char_time, jiffies);
1da177e4 2571#endif
02f1175c 2572 card = info->card;
875b206b
JS		 2573 channel = (info->line) - (card->first_line);
2574 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 2575 chip = channel >> 2;
2576 channel &= 0x03;
875b206b
JS		 2577 index = card->bus_index;
2578 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
db05c3b1 2579 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
1da177e4 2580#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191 2581 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
1da177e4 2582#endif
02f1175c
JS		 2583 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2584 break;
2585 if (timeout && time_after(jiffies, orig_jiffies +
2586 timeout))
2587 break;
2588 }
1da177e4 2589 }
02f1175c
JS		 2590 /* Run one more char cycle */
2591 msleep_interruptible(jiffies_to_msecs(char_time * 5));
1da177e4 2592#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191 2593 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
1da177e4
LT		 2594#endif
2595}
2596
2597/*
2598 * This routine is called when a particular tty device is closed.
2599 */
02f1175c 2600static void cy_close(struct tty_struct *tty, struct file *filp)
1da177e4 2601{
cab9bdd1 2602 struct cyclades_port *info = tty->driver_data;
9fa1b3b1 2603 struct cyclades_card *card;
02f1175c 2604 unsigned long flags;
1da177e4
LT		 2605
2606#ifdef CY_DEBUG_OTHER
21719191 2607 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
1da177e4
LT		 2608#endif
2609
02f1175c
JS		 2610 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2611 return;
2612 }
1da177e4 2613
9fa1b3b1
JS		 2614 card = info->card;
2615
2616 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2617 /* If the TTY is being hung up, nothing to do */
2618 if (tty_hung_up_p(filp)) {
9fa1b3b1 2619 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2620 return;
2621 }
1da177e4 2622#ifdef CY_DEBUG_OPEN
21719191
JS		 2623 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2624 info->count);
1da177e4 2625#endif
02f1175c
JS		 2626 if ((tty->count == 1) && (info->count != 1)) {
2627 /*
2628 * Uh, oh. tty->count is 1, which means that the tty
2629 * structure will be freed. Info->count should always
2630 * be one in these conditions. If it's greater than
2631 * one, we've got real problems, since it means the
2632 * serial port won't be shutdown.
2633 */
21719191
JS		 2634 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2635 "tty->count is 1, info->count is %d\n", info->count);
02f1175c
JS		 2636 info->count = 1;
2637 }
1da177e4 2638#ifdef CY_DEBUG_COUNT
21719191 2639 printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
02f1175c 2640 current->pid, info->count - 1);
1da177e4 2641#endif
02f1175c 2642 if (--info->count < 0) {
1da177e4 2643#ifdef CY_DEBUG_COUNT
21719191 2644 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
1da177e4 2645#endif
02f1175c 2646 info->count = 0;
1da177e4 2647 }
02f1175c 2648 if (info->count) {
9fa1b3b1 2649 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2650 return;
2651 }
2652 info->flags |= ASYNC_CLOSING;
1da177e4 2653
02f1175c
JS		 2654 /*
2655 * Now we wait for the transmit buffer to clear; and we notify
2656 * the line discipline to only process XON/XOFF characters.
2657 */
2658 tty->closing = 1;
9fa1b3b1 2659 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2660 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2661 tty_wait_until_sent(tty, info->closing_wait);
1da177e4 2662 }
9fa1b3b1 2663 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 2664
9fa1b3b1
JS		 2665 if (!IS_CYC_Z(*card)) {
2666 int channel = info->line - card->first_line;
2667 int index = card->bus_index;
2668 void __iomem *base_addr = card->base_addr +
02f1175c
JS		 2669 (cy_chip_offset[channel >> 2] << index);
2670 /* Stop accepting input */
2671 channel &= 0x03;
2672 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2673 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2674 readb(base_addr + (CySRER << index)) & ~CyRxData);
02f1175c
JS		 2675 if (info->flags & ASYNC_INITIALIZED) {
2676 /* Waiting for on-board buffers to be empty before closing
2677 the port */
9fa1b3b1 2678 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2679 cy_wait_until_sent(tty, info->timeout);
9fa1b3b1 2680 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2681 }
2682 } else {
2683#ifdef Z_WAKE
2684 /* Waiting for on-board buffers to be empty before closing the port */
9fa1b3b1 2685 void __iomem *base_addr = card->base_addr;
02f1175c
JS		 2686 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2687 struct ZFW_CTRL __iomem *zfw_ctrl =
db05c3b1 2688 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 2689 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
9fa1b3b1 2690 int channel = info->line - card->first_line;
02f1175c
JS		 2691 int retval;
2692
db05c3b1 2693 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
9fa1b3b1 2694 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
02f1175c 2695 if (retval != 0) {
21719191
JS		 2696 printk(KERN_DEBUG "cyc:cy_close retval on "
2697 "ttyC%d was %x\n", info->line, retval);
02f1175c 2698 }
9fa1b3b1 2699 spin_unlock_irqrestore(&card->card_lock, flags);
2c7fea99 2700 wait_for_completion_interruptible(&info->shutdown_wait);
9fa1b3b1 2701 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 2702 }
1da177e4 2703#endif
02f1175c
JS		 2704 }
2705
9fa1b3b1 2706 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2707 shutdown(info);
2708 if (tty->driver->flush_buffer)
2709 tty->driver->flush_buffer(tty);
2710 tty_ldisc_flush(tty);
9fa1b3b1 2711 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2712
2713 tty->closing = 0;
02f1175c
JS		 2714 info->tty = NULL;
2715 if (info->blocked_open) {
9fa1b3b1 2716 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2717 if (info->close_delay) {
2718 msleep_interruptible(jiffies_to_msecs
2719 (info->close_delay));
2720 }
2721 wake_up_interruptible(&info->open_wait);
9fa1b3b1 2722 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2723 }
2724 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2725 wake_up_interruptible(&info->close_wait);
1da177e4
LT		 2726
2727#ifdef CY_DEBUG_OTHER
21719191 2728 printk(KERN_DEBUG "cyc:cy_close done\n");
1da177e4
LT		 2729#endif
2730
9fa1b3b1 2731 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2732} /* cy_close */
1da177e4
LT		 2733
2734/* This routine gets called when tty_write has put something into
2735 * the write_queue. The characters may come from user space or
2736 * kernel space.
2737 *
2738 * This routine will return the number of characters actually
2739 * accepted for writing.
2740 *
2741 * If the port is not already transmitting stuff, start it off by
2742 * enabling interrupts. The interrupt service routine will then
2743 * ensure that the characters are sent.
2744 * If the port is already active, there is no need to kick it.
2745 *
2746 */
02f1175c 2747static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1da177e4 2748{
cab9bdd1 2749 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 2750 unsigned long flags;
2751 int c, ret = 0;
1da177e4
LT		 2752
2753#ifdef CY_DEBUG_IO
21719191 2754 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
1da177e4
LT		 2755#endif
2756
02f1175c
JS		 2757 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2758 return 0;
2759 }
1da177e4 2760
02f1175c
JS		 2761 if (!info->xmit_buf)
2762 return 0;
1da177e4 2763
9fa1b3b1 2764 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c
JS		 2765 while (1) {
2766 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2767 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2768
2769 if (c <= 0)
2770 break;
2771
2772 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2773 info->xmit_head = (info->xmit_head + c) &
2774 (SERIAL_XMIT_SIZE - 1);
2775 info->xmit_cnt += c;
2776 buf += c;
2777 count -= c;
2778 ret += c;
2779 }
9fa1b3b1 2780 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c
JS		 2781
2782 info->idle_stats.xmit_bytes += ret;
2783 info->idle_stats.xmit_idle = jiffies;
2784
2785 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2786 start_xmit(info);
2787 }
2788 return ret;
2789} /* cy_write */
1da177e4
LT		 2790
2791/*
2792 * This routine is called by the kernel to write a single
2793 * character to the tty device. If the kernel uses this routine,
2794 * it must call the flush_chars() routine (if defined) when it is
2795 * done stuffing characters into the driver. If there is no room
2796 * in the queue, the character is ignored.
2797 */
02f1175c 2798static void cy_put_char(struct tty_struct *tty, unsigned char ch)
1da177e4 2799{
cab9bdd1 2800 struct cyclades_port *info = tty->driver_data;
02f1175c 2801 unsigned long flags;
1da177e4
LT		 2802
2803#ifdef CY_DEBUG_IO
21719191 2804 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
1da177e4
LT		 2805#endif
2806
02f1175c
JS		 2807 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2808 return;
1da177e4 2809
02f1175c
JS		 2810 if (!info->xmit_buf)
2811 return;
1da177e4 2812
9fa1b3b1 2813 spin_lock_irqsave(&info->card->card_lock, flags);
90cc3018 2814 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
9fa1b3b1 2815 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c
JS		 2816 return;
2817 }
1da177e4 2818
02f1175c
JS		 2819 info->xmit_buf[info->xmit_head++] = ch;
2820 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2821 info->xmit_cnt++;
1da177e4
LT		 2822 info->idle_stats.xmit_bytes++;
2823 info->idle_stats.xmit_idle = jiffies;
9fa1b3b1 2824 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c 2825} /* cy_put_char */
1da177e4
LT		 2826
2827/*
2828 * This routine is called by the kernel after it has written a
2829 * series of characters to the tty device using put_char().
2830 */
02f1175c 2831static void cy_flush_chars(struct tty_struct *tty)
1da177e4 2832{
cab9bdd1 2833 struct cyclades_port *info = tty->driver_data;
02f1175c 2834
1da177e4 2835#ifdef CY_DEBUG_IO
21719191 2836 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
1da177e4
LT		 2837#endif
2838
02f1175c
JS		 2839 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2840 return;
1da177e4 2841
02f1175c
JS		 2842 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2843 !info->xmit_buf)
2844 return;
1da177e4 2845
02f1175c
JS		 2846 start_xmit(info);
2847} /* cy_flush_chars */
1da177e4
LT		 2848
2849/*
2850 * This routine returns the numbers of characters the tty driver
2851 * will accept for queuing to be written. This number is subject
2852 * to change as output buffers get emptied, or if the output flow
2853 * control is activated.
2854 */
02f1175c 2855static int cy_write_room(struct tty_struct *tty)
1da177e4 2856{
cab9bdd1 2857 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 2858 int ret;
2859
1da177e4 2860#ifdef CY_DEBUG_IO
21719191 2861 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
1da177e4
LT		 2862#endif
2863
02f1175c
JS		 2864 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2865 return 0;
2866 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2867 if (ret < 0)
2868 ret = 0;
2869 return ret;
2870} /* cy_write_room */
1da177e4 2871
02f1175c 2872static int cy_chars_in_buffer(struct tty_struct *tty)
1da177e4 2873{
875b206b 2874 struct cyclades_card *card;
cab9bdd1 2875 struct cyclades_port *info = tty->driver_data;
875b206b 2876 int channel;
1da177e4 2877
02f1175c
JS		 2878 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2879 return 0;
2880
2881 card = info->card;
875b206b 2882 channel = (info->line) - (card->first_line);
1da177e4
LT		 2883
2884#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c
JS		 2885 if (!IS_CYC_Z(cy_card[card])) {
2886#endif /* Z_EXT_CHARS_IN_BUFFER */
1da177e4 2887#ifdef CY_DEBUG_IO
21719191
JS		 2888 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2889 info->line, info->xmit_cnt);
1da177e4 2890#endif
02f1175c 2891 return info->xmit_cnt;
1da177e4 2892#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c 2893 } else {
ad39c300
JS		 2894 static struct FIRM_ID *firm_id;
2895 static struct ZFW_CTRL *zfw_ctrl;
2896 static struct CH_CTRL *ch_ctrl;
2897 static struct BUF_CTRL *buf_ctrl;
02f1175c 2898 int char_count;
ad39c300 2899 __u32 tx_put, tx_get, tx_bufsize;
02f1175c 2900
875b206b
JS		 2901 firm_id = card->base_addr + ID_ADDRESS;
2902 zfw_ctrl = card->base_addr +
db05c3b1 2903 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2904 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2905 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2906
db05c3b1
JS		 2907 tx_get = readl(&buf_ctrl->tx_get);
2908 tx_put = readl(&buf_ctrl->tx_put);
2909 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
02f1175c
JS		 2910 if (tx_put >= tx_get)
2911 char_count = tx_put - tx_get;
2912 else
2913 char_count = tx_put - tx_get + tx_bufsize;
1da177e4 2914#ifdef CY_DEBUG_IO
21719191
JS		 2915 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2916 info->line, info->xmit_cnt + char_count);
1da177e4 2917#endif
096dcfce 2918 return info->xmit_cnt + char_count;
02f1175c
JS		 2919 }
2920#endif /* Z_EXT_CHARS_IN_BUFFER */
2921} /* cy_chars_in_buffer */
1da177e4
LT		 2922
2923/*
2924 * ------------------------------------------------------------
2925 * cy_ioctl() and friends
2926 * ------------------------------------------------------------
2927 */
2928
1a86b5e3 2929static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
1da177e4 2930{
02f1175c 2931 int co, co_val, bpr;
1a86b5e3 2932 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
02f1175c 2933 25000000);
1da177e4 2934
02f1175c
JS		 2935 if (baud == 0) {
2936 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2937 return;
2938 }
1da177e4 2939
02f1175c
JS		 2940 /* determine which prescaler to use */
2941 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2942 if (cy_clock / co_val / baud > 63)
2943 break;
2944 }
1da177e4 2945
02f1175c
JS		 2946 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2947 if (bpr > 255)
2948 bpr = 255;
1da177e4 2949
02f1175c
JS		 2950 info->tbpr = info->rbpr = bpr;
2951 info->tco = info->rco = co;
1da177e4
LT		 2952}
2953
2954/*
2955 * This routine finds or computes the various line characteristics.
2956 * It used to be called config_setup
2957 */
02f1175c 2958static void set_line_char(struct cyclades_port *info)
1da177e4 2959{
875b206b 2960 struct cyclades_card *card;
02f1175c
JS		 2961 unsigned long flags;
2962 void __iomem *base_addr;
875b206b 2963 int chip, channel, index;
02f1175c
JS		 2964 unsigned cflag, iflag;
2965 unsigned short chip_number;
2966 int baud, baud_rate = 0;
2967 int i;
2968
2969 if (!info->tty || !info->tty->termios) {
2970 return;
1da177e4 2971 }
02f1175c
JS		 2972 if (info->line == -1) {
2973 return;
1da177e4 2974 }
02f1175c
JS		 2975 cflag = info->tty->termios->c_cflag;
2976 iflag = info->tty->termios->c_iflag;
1da177e4 2977
02f1175c
JS		 2978 /*
2979 * Set up the tty->alt_speed kludge
2980 */
2981 if (info->tty) {
2982 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2983 info->tty->alt_speed = 57600;
2984 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2985 info->tty->alt_speed = 115200;
2986 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2987 info->tty->alt_speed = 230400;
2988 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2989 info->tty->alt_speed = 460800;
1da177e4 2990 }
02f1175c
JS		 2991
2992 card = info->card;
875b206b 2993 channel = info->line - card->first_line;
02f1175c
JS		 2994 chip_number = channel / 4;
2995
875b206b 2996 if (!IS_CYC_Z(*card)) {
02f1175c 2997
875b206b 2998 index = card->bus_index;
02f1175c
JS		 2999
3000 /* baud rate */
3001 baud = tty_get_baud_rate(info->tty);
3002 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3003 ASYNC_SPD_CUST) {
3004 if (info->custom_divisor)
3005 baud_rate = info->baud / info->custom_divisor;
3006 else
3007 baud_rate = info->baud;
3008 } else if (baud > CD1400_MAX_SPEED) {
3009 baud = CD1400_MAX_SPEED;
3010 }
3011 /* find the baud index */
3012 for (i = 0; i < 20; i++) {
3013 if (baud == baud_table[i]) {
3014 break;
3015 }
3016 }
3017 if (i == 20) {
3018 i = 19; /* CD1400_MAX_SPEED */
3019 }
3020
3021 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3022 ASYNC_SPD_CUST) {
3023 cyy_baud_calc(info, baud_rate);
3024 } else {
3025 if (info->chip_rev >= CD1400_REV_J) {
3026 /* It is a CD1400 rev. J or later */
3027 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3028 info->tco = baud_co_60[i]; /* Tx CO */
3029 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3030 info->rco = baud_co_60[i]; /* Rx CO */
3031 } else {
3032 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3033 info->tco = baud_co_25[i]; /* Tx CO */
3034 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3035 info->rco = baud_co_25[i]; /* Rx CO */
3036 }
3037 }
3038 if (baud_table[i] == 134) {
3039 /* get it right for 134.5 baud */
3040 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3041 2;
3042 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3043 ASYNC_SPD_CUST) {
3044 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3045 baud_rate) + 2;
3046 } else if (baud_table[i]) {
3047 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3048 baud_table[i]) + 2;
3049 /* this needs to be propagated into the card info */
3050 } else {
3051 info->timeout = 0;
3052 }
3053 /* By tradition (is it a standard?) a baud rate of zero
3054 implies the line should be/has been closed. A bit
3055 later in this routine such a test is performed. */
3056
3057 /* byte size and parity */
3058 info->cor5 = 0;
3059 info->cor4 = 0;
3060 /* receive threshold */
3061 info->cor3 = (info->default_threshold ?
3062 info->default_threshold : baud_cor3[i]);
3063 info->cor2 = CyETC;
3064 switch (cflag & CSIZE) {
3065 case CS5:
3066 info->cor1 = Cy_5_BITS;
3067 break;
3068 case CS6:
3069 info->cor1 = Cy_6_BITS;
3070 break;
3071 case CS7:
3072 info->cor1 = Cy_7_BITS;
3073 break;
3074 case CS8:
3075 info->cor1 = Cy_8_BITS;
3076 break;
3077 }
3078 if (cflag & CSTOPB) {
3079 info->cor1 |= Cy_2_STOP;
3080 }
3081 if (cflag & PARENB) {
3082 if (cflag & PARODD) {
3083 info->cor1 |= CyPARITY_O;
3084 } else {
3085 info->cor1 |= CyPARITY_E;
3086 }
3087 } else {
3088 info->cor1 |= CyPARITY_NONE;
3089 }
3090
3091 /* CTS flow control flag */
3092 if (cflag & CRTSCTS) {
3093 info->flags |= ASYNC_CTS_FLOW;
3094 info->cor2 |= CyCtsAE;
3095 } else {
3096 info->flags &= ~ASYNC_CTS_FLOW;
3097 info->cor2 &= ~CyCtsAE;
3098 }
3099 if (cflag & CLOCAL)
3100 info->flags &= ~ASYNC_CHECK_CD;
3101 else
3102 info->flags |= ASYNC_CHECK_CD;
1da177e4
LT		 3103
3104 /***********************************************
3105 The hardware option, CyRtsAO, presents RTS when
3106 the chip has characters to send. Since most modems
3107 use RTS as reverse (inbound) flow control, this
3108 option is not used. If inbound flow control is
3109 necessary, DTR can be programmed to provide the
3110 appropriate signals for use with a non-standard
3111 cable. Contact Marcio Saito for details.
3112 ***********************************************/
3113
02f1175c
JS		 3114 chip = channel >> 2;
3115 channel &= 0x03;
875b206b 3116 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4 3117
9fa1b3b1 3118 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3119 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3120
3121 /* tx and rx baud rate */
3122
3123 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3124 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3125 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3126 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3127
3128 /* set line characteristics according configuration */
3129
3130 cy_writeb(base_addr + (CySCHR1 << index),
3131 START_CHAR(info->tty));
3132 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3133 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3134 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3135 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3136 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3137 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3138
3139 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3140 CyCOR3ch, index);
3141
3142 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3143 cy_writeb(base_addr + (CyRTPR << index),
3144 (info->default_timeout ? info->default_timeout : 0x02));
3145 /* 10ms rx timeout */
3146
3147 if (C_CLOCAL(info->tty)) {
3148 /* without modem intr */
3149 cy_writeb(base_addr + (CySRER << index),
db05c3b1 3150 readb(base_addr + (CySRER << index)) | CyMdmCh);
02f1175c
JS		 3151 /* act on 1->0 modem transitions */
3152 if ((cflag & CRTSCTS) && info->rflow) {
3153 cy_writeb(base_addr + (CyMCOR1 << index),
3154 (CyCTS | rflow_thr[i]));
3155 } else {
3156 cy_writeb(base_addr + (CyMCOR1 << index),
3157 CyCTS);
3158 }
3159 /* act on 0->1 modem transitions */
3160 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
1da177e4 3161 } else {
02f1175c
JS		 3162 /* without modem intr */
3163 cy_writeb(base_addr + (CySRER << index),
db05c3b1 3164 readb(base_addr +
02f1175c
JS		 3165 (CySRER << index)) | CyMdmCh);
3166 /* act on 1->0 modem transitions */
3167 if ((cflag & CRTSCTS) && info->rflow) {
3168 cy_writeb(base_addr + (CyMCOR1 << index),
3169 (CyDSR | CyCTS | CyRI | CyDCD |
3170 rflow_thr[i]));
3171 } else {
3172 cy_writeb(base_addr + (CyMCOR1 << index),
3173 CyDSR | CyCTS | CyRI | CyDCD);
3174 }
3175 /* act on 0->1 modem transitions */
3176 cy_writeb(base_addr + (CyMCOR2 << index),
3177 CyDSR | CyCTS | CyRI | CyDCD);
1da177e4 3178 }
02f1175c
JS		 3179
3180 if (i == 0) { /* baud rate is zero, turn off line */
3181 if (info->rtsdtr_inv) {
3182 cy_writeb(base_addr + (CyMSVR1 << index),
3183 ~CyRTS);
3184 } else {
3185 cy_writeb(base_addr + (CyMSVR2 << index),
3186 ~CyDTR);
3187 }
1da177e4 3188#ifdef CY_DEBUG_DTR
21719191
JS		 3189 printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3190 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3191 readb(base_addr + (CyMSVR1 << index)),
3192 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3193#endif
02f1175c
JS		 3194 } else {
3195 if (info->rtsdtr_inv) {
3196 cy_writeb(base_addr + (CyMSVR1 << index),
3197 CyRTS);
3198 } else {
3199 cy_writeb(base_addr + (CyMSVR2 << index),
3200 CyDTR);
3201 }
1da177e4 3202#ifdef CY_DEBUG_DTR
21719191
JS		 3203 printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3204 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3205 readb(base_addr + (CyMSVR1 << index)),
3206 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3207#endif
02f1175c 3208 }
1da177e4 3209
02f1175c
JS		 3210 if (info->tty) {
3211 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3212 }
9fa1b3b1 3213 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 3214
1da177e4 3215 } else {
02f1175c
JS		 3216 struct FIRM_ID __iomem *firm_id;
3217 struct ZFW_CTRL __iomem *zfw_ctrl;
3218 struct BOARD_CTRL __iomem *board_ctrl;
3219 struct CH_CTRL __iomem *ch_ctrl;
3220 struct BUF_CTRL __iomem *buf_ctrl;
1a86b5e3 3221 __u32 sw_flow;
02f1175c 3222 int retval;
1da177e4 3223
875b206b
JS		 3224 firm_id = card->base_addr + ID_ADDRESS;
3225 if (!ISZLOADED(*card)) {
02f1175c
JS		 3226 return;
3227 }
1da177e4 3228
875b206b 3229 zfw_ctrl = card->base_addr +
db05c3b1 3230 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3231 board_ctrl = &zfw_ctrl->board_ctrl;
3232 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3233 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3234
3235 /* baud rate */
3236 baud = tty_get_baud_rate(info->tty);
3237 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3238 ASYNC_SPD_CUST) {
3239 if (info->custom_divisor)
3240 baud_rate = info->baud / info->custom_divisor;
3241 else
3242 baud_rate = info->baud;
3243 } else if (baud > CYZ_MAX_SPEED) {
3244 baud = CYZ_MAX_SPEED;
3245 }
3246 cy_writel(&ch_ctrl->comm_baud, baud);
3247
3248 if (baud == 134) {
3249 /* get it right for 134.5 baud */
3250 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3251 2;
3252 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3253 ASYNC_SPD_CUST) {
3254 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3255 baud_rate) + 2;
3256 } else if (baud) {
3257 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3258 baud) + 2;
3259 /* this needs to be propagated into the card info */
3260 } else {
3261 info->timeout = 0;
3262 }
1da177e4 3263
02f1175c
JS		 3264 /* byte size and parity */
3265 switch (cflag & CSIZE) {
3266 case CS5:
3267 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3268 break;
3269 case CS6:
3270 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3271 break;
3272 case CS7:
3273 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3274 break;
3275 case CS8:
3276 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3277 break;
3278 }
3279 if (cflag & CSTOPB) {
3280 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 3281 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
02f1175c
JS		 3282 } else {
3283 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 3284 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
02f1175c
JS		 3285 }
3286 if (cflag & PARENB) {
3287 if (cflag & PARODD) {
3288 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3289 } else {
3290 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3291 }
3292 } else {
3293 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3294 }
1da177e4 3295
02f1175c
JS		 3296 /* CTS flow control flag */
3297 if (cflag & CRTSCTS) {
3298 cy_writel(&ch_ctrl->hw_flow,
db05c3b1 3299 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
02f1175c 3300 } else {
db05c3b1
JS		 3301 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3302 ~(C_RS_CTS | C_RS_RTS));
02f1175c
JS		 3303 }
3304 /* As the HW flow control is done in firmware, the driver
3305 doesn't need to care about it */
3306 info->flags &= ~ASYNC_CTS_FLOW;
3307
3308 /* XON/XOFF/XANY flow control flags */
3309 sw_flow = 0;
3310 if (iflag & IXON) {
3311 sw_flow |= C_FL_OXX;
3312 if (iflag & IXANY)
3313 sw_flow |= C_FL_OIXANY;
3314 }
3315 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3316
875b206b 3317 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
02f1175c 3318 if (retval != 0) {
21719191
JS		 3319 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3320 "was %x\n", info->line, retval);
02f1175c
JS		 3321 }
3322
3323 /* CD sensitivity */
3324 if (cflag & CLOCAL) {
3325 info->flags &= ~ASYNC_CHECK_CD;
3326 } else {
3327 info->flags |= ASYNC_CHECK_CD;
3328 }
1da177e4 3329
02f1175c
JS		 3330 if (baud == 0) { /* baud rate is zero, turn off line */
3331 cy_writel(&ch_ctrl->rs_control,
db05c3b1 3332 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
1da177e4 3333#ifdef CY_DEBUG_DTR
21719191 3334 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
1da177e4 3335#endif
02f1175c
JS		 3336 } else {
3337 cy_writel(&ch_ctrl->rs_control,
db05c3b1 3338 readl(&ch_ctrl->rs_control) | C_RS_DTR);
1da177e4 3339#ifdef CY_DEBUG_DTR
21719191 3340 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
1da177e4 3341#endif
02f1175c 3342 }
1da177e4 3343
875b206b 3344 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L);
02f1175c 3345 if (retval != 0) {
21719191
JS		 3346 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3347 "was %x\n", info->line, retval);
02f1175c 3348 }
1da177e4 3349
02f1175c
JS		 3350 if (info->tty) {
3351 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3352 }
1da177e4 3353 }
02f1175c 3354} /* set_line_char */
1da177e4
LT		 3355
3356static int
02f1175c
JS		 3357get_serial_info(struct cyclades_port *info,
3358 struct serial_struct __user * retinfo)
1da177e4 3359{
02f1175c 3360 struct serial_struct tmp;
875b206b 3361 struct cyclades_card *cinfo = info->card;
1da177e4 3362
02f1175c
JS		 3363 if (!retinfo)
3364 return -EFAULT;
3365 memset(&tmp, 0, sizeof(tmp));
3366 tmp.type = info->type;
3367 tmp.line = info->line;
875b206b
JS		 3368 tmp.port = (info->card - cy_card) * 0x100 + info->line -
3369 cinfo->first_line;
02f1175c
JS		 3370 tmp.irq = cinfo->irq;
3371 tmp.flags = info->flags;
3372 tmp.close_delay = info->close_delay;
d5dedf99 3373 tmp.closing_wait = info->closing_wait;
02f1175c
JS		 3374 tmp.baud_base = info->baud;
3375 tmp.custom_divisor = info->custom_divisor;
3376 tmp.hub6 = 0; /*!!! */
3377 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3378} /* get_serial_info */
1da177e4
LT		 3379
3380static int
02f1175c
JS		 3381set_serial_info(struct cyclades_port *info,
3382 struct serial_struct __user * new_info)
1da177e4 3383{
02f1175c
JS		 3384 struct serial_struct new_serial;
3385 struct cyclades_port old_info;
3386
3387 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3388 return -EFAULT;
3389 old_info = *info;
3390
3391 if (!capable(CAP_SYS_ADMIN)) {
3392 if (new_serial.close_delay != info->close_delay ||
3393 new_serial.baud_base != info->baud ||
3394 (new_serial.flags & ASYNC_FLAGS &
3395 ~ASYNC_USR_MASK) !=
3396 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3397 return -EPERM;
3398 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3399 (new_serial.flags & ASYNC_USR_MASK);
3400 info->baud = new_serial.baud_base;
3401 info->custom_divisor = new_serial.custom_divisor;
3402 goto check_and_exit;
3403 }
3404
3405 /*
3406 * OK, past this point, all the error checking has been done.
3407 * At this point, we start making changes.....
3408 */
3409
3410 info->baud = new_serial.baud_base;
3411 info->custom_divisor = new_serial.custom_divisor;
3412 info->flags = (info->flags & ~ASYNC_FLAGS) |
3413 (new_serial.flags & ASYNC_FLAGS);
3414 info->close_delay = new_serial.close_delay * HZ / 100;
3415 info->closing_wait = new_serial.closing_wait * HZ / 100;
1da177e4
LT		 3416
3417check_and_exit:
02f1175c
JS		 3418 if (info->flags & ASYNC_INITIALIZED) {
3419 set_line_char(info);
3420 return 0;
3421 } else {
3422 return startup(info);
3423 }
3424} /* set_serial_info */
1da177e4
LT		 3425
3426/*
3427 * get_lsr_info - get line status register info
3428 *
3429 * Purpose: Let user call ioctl() to get info when the UART physically
3430 * is emptied. On bus types like RS485, the transmitter must
3431 * release the bus after transmitting. This must be done when
3432 * the transmit shift register is empty, not be done when the
3433 * transmit holding register is empty. This functionality
3434 * allows an RS485 driver to be written in user space.
3435 */
02f1175c 3436static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
1da177e4 3437{
875b206b
JS		 3438 struct cyclades_card *card;
3439 int chip, channel, index;
02f1175c
JS		 3440 unsigned char status;
3441 unsigned int result;
3442 unsigned long flags;
3443 void __iomem *base_addr;
1da177e4 3444
02f1175c 3445 card = info->card;
875b206b
JS		 3446 channel = (info->line) - (card->first_line);
3447 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3448 chip = channel >> 2;
3449 channel &= 0x03;
875b206b
JS		 3450 index = card->bus_index;
3451 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 3452
9fa1b3b1 3453 spin_lock_irqsave(&card->card_lock, flags);
db05c3b1 3454 status = readb(base_addr + (CySRER << index)) &
02f1175c 3455 (CyTxRdy | CyTxMpty);
9fa1b3b1 3456 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3457 result = (status ? 0 : TIOCSER_TEMT);
3458 } else {
3459 /* Not supported yet */
3460 return -EINVAL;
3461 }
3462 return put_user(result, (unsigned long __user *)value);
1da177e4
LT		 3463}
3464
02f1175c 3465static int cy_tiocmget(struct tty_struct *tty, struct file *file)
1da177e4 3466{
cab9bdd1 3467 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 3468 struct cyclades_card *card;
3469 int chip, channel, index;
02f1175c
JS		 3470 void __iomem *base_addr;
3471 unsigned long flags;
3472 unsigned char status;
3473 unsigned long lstatus;
3474 unsigned int result;
3475 struct FIRM_ID __iomem *firm_id;
3476 struct ZFW_CTRL __iomem *zfw_ctrl;
3477 struct BOARD_CTRL __iomem *board_ctrl;
3478 struct CH_CTRL __iomem *ch_ctrl;
3479
3480 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3481 return -ENODEV;
1da177e4 3482
02f1175c 3483 card = info->card;
875b206b
JS		 3484 channel = info->line - card->first_line;
3485 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3486 chip = channel >> 2;
3487 channel &= 0x03;
875b206b
JS		 3488 index = card->bus_index;
3489 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4 3490
9fa1b3b1 3491 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3492 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
db05c3b1
JS		 3493 status = readb(base_addr + (CyMSVR1 << index));
3494 status |= readb(base_addr + (CyMSVR2 << index));
9fa1b3b1 3495 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3496
3497 if (info->rtsdtr_inv) {
3498 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3499 ((status & CyDTR) ? TIOCM_RTS : 0);
3500 } else {
3501 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3502 ((status & CyDTR) ? TIOCM_DTR : 0);
3503 }
3504 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3505 ((status & CyRI) ? TIOCM_RNG : 0) |
3506 ((status & CyDSR) ? TIOCM_DSR : 0) |
3507 ((status & CyCTS) ? TIOCM_CTS : 0);
1da177e4 3508 } else {
875b206b
JS		 3509 base_addr = card->base_addr;
3510 firm_id = card->base_addr + ID_ADDRESS;
3511 if (ISZLOADED(*card)) {
3512 zfw_ctrl = card->base_addr +
db05c3b1 3513 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3514 board_ctrl = &zfw_ctrl->board_ctrl;
3515 ch_ctrl = zfw_ctrl->ch_ctrl;
db05c3b1 3516 lstatus = readl(&ch_ctrl[channel].rs_status);
02f1175c
JS		 3517 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3518 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3519 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3520 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3521 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3522 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3523 } else {
3524 result = 0;
3525 return -ENODEV;
3526 }
1da177e4 3527
02f1175c
JS		 3528 }
3529 return result;
3530} /* cy_tiomget */
1da177e4
LT		 3531
3532static int
3533cy_tiocmset(struct tty_struct *tty, struct file *file,
02f1175c 3534 unsigned int set, unsigned int clear)
1da177e4 3535{
cab9bdd1 3536 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 3537 struct cyclades_card *card;
3538 int chip, channel, index;
02f1175c
JS		 3539 void __iomem *base_addr;
3540 unsigned long flags;
3541 struct FIRM_ID __iomem *firm_id;
3542 struct ZFW_CTRL __iomem *zfw_ctrl;
3543 struct BOARD_CTRL __iomem *board_ctrl;
3544 struct CH_CTRL __iomem *ch_ctrl;
3545 int retval;
3546
3547 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3548 return -ENODEV;
3549
3550 card = info->card;
875b206b
JS		 3551 channel = (info->line) - (card->first_line);
3552 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3553 chip = channel >> 2;
3554 channel &= 0x03;
875b206b
JS		 3555 index = card->bus_index;
3556 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c
JS		 3557
3558 if (set & TIOCM_RTS) {
9fa1b3b1 3559 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3560 cy_writeb(base_addr + (CyCAR << index),
3561 (u_char) channel);
3562 if (info->rtsdtr_inv) {
3563 cy_writeb(base_addr + (CyMSVR2 << index),
3564 CyDTR);
3565 } else {
3566 cy_writeb(base_addr + (CyMSVR1 << index),
3567 CyRTS);
3568 }
9fa1b3b1 3569 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3570 }
3571 if (clear & TIOCM_RTS) {
9fa1b3b1 3572 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3573 cy_writeb(base_addr + (CyCAR << index),
3574 (u_char) channel);
3575 if (info->rtsdtr_inv) {
3576 cy_writeb(base_addr + (CyMSVR2 << index),
3577 ~CyDTR);
3578 } else {
3579 cy_writeb(base_addr + (CyMSVR1 << index),
3580 ~CyRTS);
3581 }
9fa1b3b1 3582 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3583 }
3584 if (set & TIOCM_DTR) {
9fa1b3b1 3585 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3586 cy_writeb(base_addr + (CyCAR << index),
3587 (u_char) channel);
3588 if (info->rtsdtr_inv) {
3589 cy_writeb(base_addr + (CyMSVR1 << index),
3590 CyRTS);
3591 } else {
3592 cy_writeb(base_addr + (CyMSVR2 << index),
3593 CyDTR);
3594 }
1da177e4 3595#ifdef CY_DEBUG_DTR
21719191
JS		 3596 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3597 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3598 readb(base_addr + (CyMSVR1 << index)),
3599 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3600#endif
9fa1b3b1 3601 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3602 }
3603 if (clear & TIOCM_DTR) {
9fa1b3b1 3604 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3605 cy_writeb(base_addr + (CyCAR << index),
3606 (u_char) channel);
3607 if (info->rtsdtr_inv) {
3608 cy_writeb(base_addr + (CyMSVR1 << index),
3609 ~CyRTS);
3610 } else {
3611 cy_writeb(base_addr + (CyMSVR2 << index),
3612 ~CyDTR);
3613 }
1da177e4
LT		 3614
3615#ifdef CY_DEBUG_DTR
21719191
JS		 3616 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3617 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3618 readb(base_addr + (CyMSVR1 << index)),
3619 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3620#endif
9fa1b3b1 3621 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3622 }
3623 } else {
875b206b 3624 base_addr = card->base_addr;
02f1175c 3625
875b206b
JS		 3626 firm_id = card->base_addr + ID_ADDRESS;
3627 if (ISZLOADED(*card)) {
3628 zfw_ctrl = card->base_addr +
db05c3b1 3629 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3630 board_ctrl = &zfw_ctrl->board_ctrl;
3631 ch_ctrl = zfw_ctrl->ch_ctrl;
3632
3633 if (set & TIOCM_RTS) {
9fa1b3b1 3634 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3635 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3636 readl(&ch_ctrl[channel].rs_control) |
3637 C_RS_RTS);
9fa1b3b1 3638 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3639 }
3640 if (clear & TIOCM_RTS) {
9fa1b3b1 3641 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3642 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3643 readl(&ch_ctrl[channel].rs_control) &
3644 ~C_RS_RTS);
9fa1b3b1 3645 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3646 }
3647 if (set & TIOCM_DTR) {
9fa1b3b1 3648 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3649 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3650 readl(&ch_ctrl[channel].rs_control) |
3651 C_RS_DTR);
1da177e4 3652#ifdef CY_DEBUG_DTR
21719191
JS		 3653 printk(KERN_DEBUG "cyc:set_modem_info raising "
3654 "Z DTR\n");
1da177e4 3655#endif
9fa1b3b1 3656 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3657 }
3658 if (clear & TIOCM_DTR) {
9fa1b3b1 3659 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3660 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3661 readl(&ch_ctrl[channel].rs_control) &
3662 ~C_RS_DTR);
1da177e4 3663#ifdef CY_DEBUG_DTR
21719191
JS		 3664 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3665 "Z DTR\n");
1da177e4 3666#endif
9fa1b3b1 3667 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3668 }
3669 } else {
3670 return -ENODEV;
3671 }
9fa1b3b1
JS		 3672 spin_lock_irqsave(&card->card_lock, flags);
3673 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
02f1175c 3674 if (retval != 0) {
21719191
JS		 3675 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3676 "was %x\n", info->line, retval);
02f1175c 3677 }
9fa1b3b1 3678 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 3679 }
02f1175c
JS		 3680 return 0;
3681} /* cy_tiocmset */
1da177e4
LT		 3682
3683/*
3684 * cy_break() --- routine which turns the break handling on or off
3685 */
02f1175c 3686static void cy_break(struct tty_struct *tty, int break_state)
1da177e4 3687{
cab9bdd1 3688 struct cyclades_port *info = tty->driver_data;
9fa1b3b1 3689 struct cyclades_card *card;
02f1175c 3690 unsigned long flags;
1da177e4 3691
02f1175c
JS		 3692 if (serial_paranoia_check(info, tty->name, "cy_break"))
3693 return;
1da177e4 3694
9fa1b3b1
JS		 3695 card = info->card;
3696
3697 spin_lock_irqsave(&card->card_lock, flags);
3698 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3699 /* Let the transmit ISR take care of this (since it
3700 requires stuffing characters into the output stream).
3701 */
3702 if (break_state == -1) {
3703 if (!info->breakon) {
3704 info->breakon = 1;
3705 if (!info->xmit_cnt) {
9fa1b3b1 3706 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 3707 start_xmit(info);
9fa1b3b1 3708 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3709 }
3710 }
3711 } else {
3712 if (!info->breakoff) {
3713 info->breakoff = 1;
3714 if (!info->xmit_cnt) {
9fa1b3b1 3715 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 3716 start_xmit(info);
9fa1b3b1 3717 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3718 }
3719 }
1da177e4 3720 }
1da177e4 3721 } else {
02f1175c
JS		 3722 int retval;
3723
3724 if (break_state == -1) {
9fa1b3b1
JS		 3725 retval = cyz_issue_cmd(card,
3726 info->line - card->first_line,
02f1175c
JS		 3727 C_CM_SET_BREAK, 0L);
3728 if (retval != 0) {
21719191
JS		 3729 printk(KERN_ERR "cyc:cy_break (set) retval on "
3730 "ttyC%d was %x\n", info->line, retval);
02f1175c
JS		 3731 }
3732 } else {
9fa1b3b1
JS		 3733 retval = cyz_issue_cmd(card,
3734 info->line - card->first_line,
02f1175c
JS		 3735 C_CM_CLR_BREAK, 0L);
3736 if (retval != 0) {
21719191
JS		 3737 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3738 "on ttyC%d was %x\n", info->line,
3739 retval);
02f1175c 3740 }
1da177e4 3741 }
1da177e4 3742 }
9fa1b3b1 3743 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 3744} /* cy_break */
1da177e4
LT		 3745
3746static int
02f1175c 3747get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
1da177e4
LT		 3748{
3749
02f1175c
JS		 3750 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3751 return -EFAULT;
3752 info->mon.int_count = 0;
3753 info->mon.char_count = 0;
3754 info->mon.char_max = 0;
3755 info->mon.char_last = 0;
3756 return 0;
3757} /* get_mon_info */
1da177e4 3758
02f1175c 3759static int set_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 3760{
875b206b 3761 struct cyclades_card *card;
02f1175c 3762 void __iomem *base_addr;
875b206b 3763 int channel, chip, index;
02f1175c 3764 unsigned long flags;
1da177e4 3765
02f1175c 3766 card = info->card;
875b206b
JS		 3767 channel = info->line - card->first_line;
3768 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3769 chip = channel >> 2;
3770 channel &= 0x03;
875b206b 3771 index = card->bus_index;
02f1175c 3772 base_addr =
875b206b 3773 card->base_addr + (cy_chip_offset[chip] << index);
02f1175c
JS		 3774
3775 info->cor3 &= ~CyREC_FIFO;
3776 info->cor3 |= value & CyREC_FIFO;
1da177e4 3777
9fa1b3b1 3778 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3779 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3780 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
9fa1b3b1 3781 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3782 }
3783 return 0;
3784} /* set_threshold */
1da177e4
LT		 3785
3786static int
02f1175c 3787get_threshold(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3788{
875b206b 3789 struct cyclades_card *card;
02f1175c 3790 void __iomem *base_addr;
875b206b 3791 int channel, chip, index;
02f1175c 3792 unsigned long tmp;
1da177e4 3793
02f1175c 3794 card = info->card;
875b206b
JS		 3795 channel = info->line - card->first_line;
3796 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3797 chip = channel >> 2;
3798 channel &= 0x03;
875b206b
JS		 3799 index = card->bus_index;
3800 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 3801
db05c3b1 3802 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
02f1175c 3803 return put_user(tmp, value);
02f1175c 3804 }
f7429034 3805 return 0;
02f1175c 3806} /* get_threshold */
1da177e4
LT		 3807
3808static int
02f1175c 3809set_default_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 3810{
02f1175c
JS		 3811 info->default_threshold = value & 0x0f;
3812 return 0;
3813} /* set_default_threshold */
1da177e4
LT		 3814
3815static int
02f1175c 3816get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3817{
02f1175c
JS		 3818 return put_user(info->default_threshold, value);
3819} /* get_default_threshold */
1da177e4 3820
02f1175c 3821static int set_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3822{
875b206b 3823 struct cyclades_card *card;
02f1175c 3824 void __iomem *base_addr;
875b206b 3825 int channel, chip, index;
02f1175c 3826 unsigned long flags;
1da177e4 3827
02f1175c 3828 card = info->card;
875b206b
JS		 3829 channel = info->line - card->first_line;
3830 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3831 chip = channel >> 2;
3832 channel &= 0x03;
875b206b
JS		 3833 index = card->bus_index;
3834 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4 3835
9fa1b3b1 3836 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3837 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
9fa1b3b1 3838 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3839 }
3840 return 0;
3841} /* set_timeout */
1da177e4 3842
02f1175c 3843static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3844{
875b206b 3845 struct cyclades_card *card;
02f1175c 3846 void __iomem *base_addr;
875b206b 3847 int channel, chip, index;
02f1175c 3848 unsigned long tmp;
1da177e4 3849
02f1175c 3850 card = info->card;
875b206b
JS		 3851 channel = info->line - card->first_line;
3852 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3853 chip = channel >> 2;
3854 channel &= 0x03;
875b206b
JS		 3855 index = card->bus_index;
3856 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 3857
db05c3b1 3858 tmp = readb(base_addr + (CyRTPR << index));
02f1175c 3859 return put_user(tmp, value);
02f1175c 3860 }
f7429034 3861 return 0;
02f1175c 3862} /* get_timeout */
1da177e4 3863
02f1175c 3864static int set_default_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3865{
02f1175c
JS		 3866 info->default_timeout = value & 0xff;
3867 return 0;
3868} /* set_default_timeout */
1da177e4
LT		 3869
3870static int
02f1175c 3871get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3872{
02f1175c
JS		 3873 return put_user(info->default_timeout, value);
3874} /* get_default_timeout */
1da177e4
LT		 3875
3876/*
3877 * This routine allows the tty driver to implement device-
3878 * specific ioctl's. If the ioctl number passed in cmd is
3879 * not recognized by the driver, it should return ENOIOCTLCMD.
3880 */
3881static int
02f1175c
JS		 3882cy_ioctl(struct tty_struct *tty, struct file *file,
3883 unsigned int cmd, unsigned long arg)
1da177e4 3884{
cab9bdd1 3885 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 3886 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3887 struct serial_icounter_struct __user *p_cuser; /* user space */
3888 int ret_val = 0;
3889 unsigned long flags;
3890 void __user *argp = (void __user *)arg;
3891
3892 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3893 return -ENODEV;
1da177e4
LT		 3894
3895#ifdef CY_DEBUG_OTHER
21719191
JS		 3896 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3897 info->line, cmd, arg);
1da177e4
LT		 3898#endif
3899
02f1175c
JS		 3900 switch (cmd) {
3901 case CYGETMON:
3902 ret_val = get_mon_info(info, argp);
3903 break;
3904 case CYGETTHRESH:
3905 ret_val = get_threshold(info, argp);
3906 break;
3907 case CYSETTHRESH:
3908 ret_val = set_threshold(info, arg);
3909 break;
3910 case CYGETDEFTHRESH:
3911 ret_val = get_default_threshold(info, argp);
3912 break;
3913 case CYSETDEFTHRESH:
3914 ret_val = set_default_threshold(info, arg);
3915 break;
3916 case CYGETTIMEOUT:
3917 ret_val = get_timeout(info, argp);
3918 break;
3919 case CYSETTIMEOUT:
3920 ret_val = set_timeout(info, arg);
3921 break;
3922 case CYGETDEFTIMEOUT:
3923 ret_val = get_default_timeout(info, argp);
3924 break;
3925 case CYSETDEFTIMEOUT:
3926 ret_val = set_default_timeout(info, arg);
3927 break;
1da177e4 3928 case CYSETRFLOW:
02f1175c
JS		 3929 info->rflow = (int)arg;
3930 ret_val = 0;
3931 break;
1da177e4 3932 case CYGETRFLOW:
02f1175c
JS		 3933 ret_val = info->rflow;
3934 break;
1da177e4 3935 case CYSETRTSDTR_INV:
02f1175c
JS		 3936 info->rtsdtr_inv = (int)arg;
3937 ret_val = 0;
3938 break;
1da177e4 3939 case CYGETRTSDTR_INV:
02f1175c
JS		 3940 ret_val = info->rtsdtr_inv;
3941 break;
1da177e4 3942 case CYGETCD1400VER:
02f1175c
JS		 3943 ret_val = info->chip_rev;
3944 break;
1da177e4
LT		 3945#ifndef CONFIG_CYZ_INTR
3946 case CYZSETPOLLCYCLE:
02f1175c
JS		 3947 cyz_polling_cycle = (arg * HZ) / 1000;
3948 ret_val = 0;
3949 break;
1da177e4 3950 case CYZGETPOLLCYCLE:
02f1175c
JS		 3951 ret_val = (cyz_polling_cycle * 1000) / HZ;
3952 break;
3953#endif /* CONFIG_CYZ_INTR */
1da177e4 3954 case CYSETWAIT:
02f1175c
JS		 3955 info->closing_wait = (unsigned short)arg *HZ / 100;
3956 ret_val = 0;
3957 break;
1da177e4 3958 case CYGETWAIT:
02f1175c
JS		 3959 ret_val = info->closing_wait / (HZ / 100);
3960 break;
3961 case TIOCGSERIAL:
3962 ret_val = get_serial_info(info, argp);
3963 break;
3964 case TIOCSSERIAL:
3965 ret_val = set_serial_info(info, argp);
3966 break;
3967 case TIOCSERGETLSR: /* Get line status register */
3968 ret_val = get_lsr_info(info, argp);
3969 break;
3970 /*
3971 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
3972 * - mask passed in arg for lines of interest
3973 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
3974 * Caller should use TIOCGICOUNT to see which one it was
3975 */
1da177e4 3976 case TIOCMIWAIT:
9fa1b3b1 3977 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 3978 /* note the counters on entry */
2c7fea99 3979 cnow = info->icount;
9fa1b3b1 3980 spin_unlock_irqrestore(&info->card->card_lock, flags);
2c7fea99
JS		 3981 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
3982 cprev = cnow;
9fa1b3b1 3983 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 3984 cnow = info->icount; /* atomic copy */
9fa1b3b1 3985 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c 3986
2c7fea99
JS		 3987 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
3988 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
3989 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
3990 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
3991 }));
3992 break;
1da177e4 3993
02f1175c
JS		 3994 /*
3995 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
3996 * Return: write counters to the user passed counter struct
3997 * NB: both 1->0 and 0->1 transitions are counted except for
3998 * RI where only 0->1 is counted.
3999 */
1da177e4 4000 case TIOCGICOUNT:
9fa1b3b1 4001 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 4002 cnow = info->icount;
9fa1b3b1 4003 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c
JS		 4004 p_cuser = argp;
4005 ret_val = put_user(cnow.cts, &p_cuser->cts);
4006 if (ret_val)
4007 return ret_val;
4008 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4009 if (ret_val)
4010 return ret_val;
4011 ret_val = put_user(cnow.rng, &p_cuser->rng);
4012 if (ret_val)
4013 return ret_val;
4014 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4015 if (ret_val)
4016 return ret_val;
4017 ret_val = put_user(cnow.rx, &p_cuser->rx);
4018 if (ret_val)
4019 return ret_val;
4020 ret_val = put_user(cnow.tx, &p_cuser->tx);
4021 if (ret_val)
4022 return ret_val;
4023 ret_val = put_user(cnow.frame, &p_cuser->frame);
4024 if (ret_val)
4025 return ret_val;
4026 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4027 if (ret_val)
4028 return ret_val;
4029 ret_val = put_user(cnow.parity, &p_cuser->parity);
4030 if (ret_val)
4031 return ret_val;
4032 ret_val = put_user(cnow.brk, &p_cuser->brk);
4033 if (ret_val)
4034 return ret_val;
4035 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4036 if (ret_val)
4037 return ret_val;
4038 ret_val = 0;
4039 break;
4040 default:
4041 ret_val = -ENOIOCTLCMD;
4042 }
1da177e4
LT		 4043
4044#ifdef CY_DEBUG_OTHER
21719191 4045 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
1da177e4
LT		 4046#endif
4047
02f1175c
JS		 4048 return ret_val;
4049} /* cy_ioctl */
1da177e4
LT		 4050
4051/*
4052 * This routine allows the tty driver to be notified when
4053 * device's termios settings have changed. Note that a
4054 * well-designed tty driver should be prepared to accept the case
4055 * where old == NULL, and try to do something rational.
4056 */
02f1175c 4057static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 4058{
cab9bdd1 4059 struct cyclades_port *info = tty->driver_data;
1da177e4
LT		 4060
4061#ifdef CY_DEBUG_OTHER
21719191 4062 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
1da177e4
LT		 4063#endif
4064
02f1175c
JS		 4065 set_line_char(info);
4066
4067 if ((old_termios->c_cflag & CRTSCTS) &&
4068 !(tty->termios->c_cflag & CRTSCTS)) {
4069 tty->hw_stopped = 0;
4070 cy_start(tty);
4071 }
1da177e4 4072#if 0
02f1175c
JS		 4073 /*
4074 * No need to wake up processes in open wait, since they
4075 * sample the CLOCAL flag once, and don't recheck it.
4076 * XXX It's not clear whether the current behavior is correct
4077 * or not. Hence, this may change.....
4078 */
4079 if (!(old_termios->c_cflag & CLOCAL) &&
4080 (tty->termios->c_cflag & CLOCAL))
4081 wake_up_interruptible(&info->open_wait);
1da177e4 4082#endif
02f1175c 4083} /* cy_set_termios */
1da177e4
LT		 4084
4085/* This function is used to send a high-priority XON/XOFF character to
4086 the device.
4087*/
02f1175c 4088static void cy_send_xchar(struct tty_struct *tty, char ch)
1da177e4 4089{
cab9bdd1 4090 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 4091 struct cyclades_card *card;
4092 int channel;
1da177e4 4093
02f1175c 4094 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
1da177e4
LT		 4095 return;
4096
02f1175c 4097 info->x_char = ch;
1da177e4
LT		 4098
4099 if (ch)
02f1175c 4100 cy_start(tty);
1da177e4
LT		 4101
4102 card = info->card;
875b206b 4103 channel = info->line - card->first_line;
1da177e4 4104
875b206b 4105 if (IS_CYC_Z(*card)) {
02f1175c 4106 if (ch == STOP_CHAR(tty))
875b206b 4107 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
02f1175c 4108 else if (ch == START_CHAR(tty))
875b206b 4109 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
1da177e4
LT		 4110 }
4111}
4112
4113/* This routine is called by the upper-layer tty layer to signal
4114 that incoming characters should be throttled because the input
4115 buffers are close to full.
4116 */
02f1175c 4117static void cy_throttle(struct tty_struct *tty)
1da177e4 4118{
cab9bdd1 4119 struct cyclades_port *info = tty->driver_data;
875b206b 4120 struct cyclades_card *card;
02f1175c
JS		 4121 unsigned long flags;
4122 void __iomem *base_addr;
875b206b 4123 int chip, channel, index;
1da177e4
LT		 4124
4125#ifdef CY_DEBUG_THROTTLE
02f1175c 4126 char buf[64];
1da177e4 4127
21719191 4128 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
02f1175c 4129 tty->ldisc.chars_in_buffer(tty), info->line);
1da177e4
LT		 4130#endif
4131
02f1175c
JS		 4132 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4133 return;
4134 }
4135
4136 card = info->card;
4137
4138 if (I_IXOFF(tty)) {
875b206b 4139 if (!IS_CYC_Z(*card))
02f1175c
JS		 4140 cy_send_xchar(tty, STOP_CHAR(tty));
4141 else
4142 info->throttle = 1;
4143 }
1da177e4 4144
02f1175c 4145 if (tty->termios->c_cflag & CRTSCTS) {
875b206b
JS		 4146 channel = info->line - card->first_line;
4147 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 4148 chip = channel >> 2;
4149 channel &= 0x03;
875b206b
JS		 4150 index = card->bus_index;
4151 base_addr = card->base_addr +
02f1175c
JS		 4152 (cy_chip_offset[chip] << index);
4153
9fa1b3b1 4154 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 4155 cy_writeb(base_addr + (CyCAR << index),
4156 (u_char) channel);
4157 if (info->rtsdtr_inv) {
4158 cy_writeb(base_addr + (CyMSVR2 << index),
4159 ~CyDTR);
4160 } else {
4161 cy_writeb(base_addr + (CyMSVR1 << index),
4162 ~CyRTS);
4163 }
9fa1b3b1 4164 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 4165 } else {
4166 info->throttle = 1;
4167 }
4168 }
02f1175c 4169} /* cy_throttle */
1da177e4
LT		 4170
4171/*
4172 * This routine notifies the tty driver that it should signal
4173 * that characters can now be sent to the tty without fear of
4174 * overrunning the input buffers of the line disciplines.
4175 */
02f1175c 4176static void cy_unthrottle(struct tty_struct *tty)
1da177e4 4177{
cab9bdd1 4178 struct cyclades_port *info = tty->driver_data;
875b206b 4179 struct cyclades_card *card;
02f1175c
JS		 4180 unsigned long flags;
4181 void __iomem *base_addr;
875b206b 4182 int chip, channel, index;
1da177e4
LT		 4183
4184#ifdef CY_DEBUG_THROTTLE
02f1175c
JS		 4185 char buf[64];
4186
21719191
JS		 4187 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4188 tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty),info->line);
1da177e4
LT		 4189#endif
4190
02f1175c
JS		 4191 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4192 return;
4193 }
1da177e4 4194
02f1175c
JS		 4195 if (I_IXOFF(tty)) {
4196 if (info->x_char)
4197 info->x_char = 0;
4198 else
4199 cy_send_xchar(tty, START_CHAR(tty));
1da177e4 4200 }
1da177e4 4201
02f1175c
JS		 4202 if (tty->termios->c_cflag & CRTSCTS) {
4203 card = info->card;
875b206b
JS		 4204 channel = info->line - card->first_line;
4205 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 4206 chip = channel >> 2;
4207 channel &= 0x03;
875b206b
JS		 4208 index = card->bus_index;
4209 base_addr = card->base_addr +
02f1175c
JS		 4210 (cy_chip_offset[chip] << index);
4211
9fa1b3b1 4212 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 4213 cy_writeb(base_addr + (CyCAR << index),
4214 (u_char) channel);
4215 if (info->rtsdtr_inv) {
4216 cy_writeb(base_addr + (CyMSVR2 << index),
4217 CyDTR);
4218 } else {
4219 cy_writeb(base_addr + (CyMSVR1 << index),
4220 CyRTS);
4221 }
9fa1b3b1 4222 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 4223 } else {
4224 info->throttle = 0;
4225 }
4226 }
02f1175c 4227} /* cy_unthrottle */
1da177e4
LT		 4228
4229/* cy_start and cy_stop provide software output flow control as a
4230 function of XON/XOFF, software CTS, and other such stuff.
4231*/
02f1175c 4232static void cy_stop(struct tty_struct *tty)
1da177e4 4233{
02f1175c 4234 struct cyclades_card *cinfo;
cab9bdd1 4235 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4236 void __iomem *base_addr;
4237 int chip, channel, index;
4238 unsigned long flags;
1da177e4
LT		 4239
4240#ifdef CY_DEBUG_OTHER
21719191 4241 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
1da177e4
LT		 4242#endif
4243
02f1175c
JS		 4244 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4245 return;
1da177e4 4246
875b206b 4247 cinfo = info->card;
02f1175c
JS		 4248 channel = info->line - cinfo->first_line;
4249 if (!IS_CYC_Z(*cinfo)) {
4250 index = cinfo->bus_index;
4251 chip = channel >> 2;
4252 channel &= 0x03;
9fa1b3b1 4253 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
1da177e4 4254
9fa1b3b1 4255 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 4256 cy_writeb(base_addr + (CyCAR << index),
4257 (u_char)(channel & 0x0003)); /* index channel */
4258 cy_writeb(base_addr + (CySRER << index),
db05c3b1 4259 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
9fa1b3b1 4260 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c 4261 }
02f1175c 4262} /* cy_stop */
1da177e4 4263
02f1175c 4264static void cy_start(struct tty_struct *tty)
1da177e4 4265{
02f1175c 4266 struct cyclades_card *cinfo;
cab9bdd1 4267 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4268 void __iomem *base_addr;
4269 int chip, channel, index;
4270 unsigned long flags;
1da177e4
LT		 4271
4272#ifdef CY_DEBUG_OTHER
21719191 4273 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
1da177e4
LT		 4274#endif
4275
02f1175c
JS		 4276 if (serial_paranoia_check(info, tty->name, "cy_start"))
4277 return;
1da177e4 4278
875b206b 4279 cinfo = info->card;
02f1175c
JS		 4280 channel = info->line - cinfo->first_line;
4281 index = cinfo->bus_index;
4282 if (!IS_CYC_Z(*cinfo)) {
4283 chip = channel >> 2;
4284 channel &= 0x03;
9fa1b3b1 4285 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
1da177e4 4286
9fa1b3b1 4287 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 4288 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4289 cy_writeb(base_addr + (CySRER << index),
db05c3b1 4290 readb(base_addr + (CySRER << index)) | CyTxRdy);
9fa1b3b1 4291 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c 4292 }
02f1175c 4293} /* cy_start */
1da177e4 4294
02f1175c 4295static void cy_flush_buffer(struct tty_struct *tty)
1da177e4 4296{
cab9bdd1 4297 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 4298 struct cyclades_card *card;
4299 int channel, retval;
02f1175c
JS		 4300 unsigned long flags;
4301
1da177e4 4302#ifdef CY_DEBUG_IO
21719191 4303 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
1da177e4
LT		 4304#endif
4305
02f1175c
JS		 4306 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4307 return;
1da177e4 4308
02f1175c 4309 card = info->card;
875b206b 4310 channel = info->line - card->first_line;
1da177e4 4311
9fa1b3b1 4312 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 4313 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
9fa1b3b1 4314 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 4315
875b206b 4316 if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board
02f1175c 4317 buffers as well */
9fa1b3b1 4318 spin_lock_irqsave(&card->card_lock, flags);
875b206b 4319 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
02f1175c 4320 if (retval != 0) {
21719191
JS		 4321 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
4322 "was %x\n", info->line, retval);
02f1175c 4323 }
9fa1b3b1 4324 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 4325 }
4326 tty_wakeup(tty);
02f1175c 4327} /* cy_flush_buffer */
1da177e4
LT		 4328
4329/*
4330 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4331 */
02f1175c 4332static void cy_hangup(struct tty_struct *tty)
1da177e4 4333{
cab9bdd1 4334 struct cyclades_port *info = tty->driver_data;
02f1175c 4335
1da177e4 4336#ifdef CY_DEBUG_OTHER
21719191 4337 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
1da177e4
LT		 4338#endif
4339
02f1175c
JS		 4340 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4341 return;
1da177e4 4342
02f1175c
JS		 4343 cy_flush_buffer(tty);
4344 shutdown(info);
02f1175c 4345 info->count = 0;
1da177e4 4346#ifdef CY_DEBUG_COUNT
21719191
JS		 4347 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4348 current->pid);
1da177e4 4349#endif
02f1175c
JS		 4350 info->tty = NULL;
4351 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4352 wake_up_interruptible(&info->open_wait);
4353} /* cy_hangup */
1da177e4
LT		 4354
4355/*
4356 * ---------------------------------------------------------------------
4357 * cy_init() and friends
4358 *
4359 * cy_init() is called at boot-time to initialize the serial driver.
4360 * ---------------------------------------------------------------------
4361 */
4362
dd025c0c 4363static int __devinit cy_init_card(struct cyclades_card *cinfo)
0809e267
JS		 4364{
4365 struct cyclades_port *info;
a6343afb 4366 u32 uninitialized_var(mailbox);
0809e267
JS		 4367 unsigned int nports;
4368 unsigned short chip_number;
a6343afb 4369 int uninitialized_var(index), port;
0809e267 4370
3046d50e
JS		 4371 spin_lock_init(&cinfo->card_lock);
4372
c2ad4c75 4373 if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
0809e267
JS		 4374 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4375 cinfo->ctl_addr)->mail_box_0);
4376 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4377 cinfo->intr_enabled = 0;
4378 cinfo->nports = 0; /* Will be correctly set later, after
4379 Z FW is loaded */
3046d50e
JS		 4380 } else {
4381 index = cinfo->bus_index;
4382 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4383 }
4384
dd025c0c
JS		 4385 cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
4386 if (cinfo->ports == NULL) {
4387 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
3137553d 4388 cinfo->nports = 0;
dd025c0c
JS		 4389 return -ENOMEM;
4390 }
4391
3046d50e
JS		 4392 for (port = cinfo->first_line; port < cinfo->first_line + nports;
4393 port++) {
dd025c0c 4394 info = &cinfo->ports[port - cinfo->first_line];
3046d50e 4395 info->magic = CYCLADES_MAGIC;
875b206b 4396 info->card = cinfo;
3046d50e
JS		 4397 info->line = port;
4398 info->flags = STD_COM_FLAGS;
4399 info->closing_wait = CLOSING_WAIT_DELAY;
4400 info->close_delay = 5 * HZ / 10;
4401
3046d50e
JS		 4402 init_waitqueue_head(&info->open_wait);
4403 init_waitqueue_head(&info->close_wait);
2c7fea99 4404 init_completion(&info->shutdown_wait);
3046d50e
JS		 4405 init_waitqueue_head(&info->delta_msr_wait);
4406
4407 if (IS_CYC_Z(*cinfo)) {
0809e267 4408 info->type = PORT_STARTECH;
0809e267
JS		 4409 if (mailbox == ZO_V1)
4410 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4411 else
3046d50e 4412 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
0809e267 4413#ifdef CONFIG_CYZ_INTR
3991428d
JS		 4414 setup_timer(&cyz_rx_full_timer[port],
4415 cyz_rx_restart, (unsigned long)info);
0809e267 4416#endif
3046d50e 4417 } else {
0809e267 4418 info->type = PORT_CIRRUS;
0809e267 4419 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
3046d50e 4420 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
0809e267
JS		 4421 info->cor2 = CyETC;
4422 info->cor3 = 0x08; /* _very_ small rcv threshold */
3046d50e 4423
0809e267 4424 chip_number = (port - cinfo->first_line) / 4;
3046d50e 4425 if ((info->chip_rev = readb(cinfo->base_addr +
0809e267
JS		 4426 (cy_chip_offset[chip_number] <<
4427 index) + (CyGFRCR << index))) >=
4428 CD1400_REV_J) {
4429 /* It is a CD1400 rev. J or later */
4430 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4431 info->tco = baud_co_60[13]; /* Tx CO */
4432 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4433 info->rco = baud_co_60[13]; /* Rx CO */
0809e267
JS		 4434 info->rtsdtr_inv = 1;
4435 } else {
4436 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4437 info->tco = baud_co_25[13]; /* Tx CO */
4438 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4439 info->rco = baud_co_25[13]; /* Rx CO */
0809e267
JS		 4440 info->rtsdtr_inv = 0;
4441 }
3046d50e
JS		 4442 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4443 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
0809e267 4444 }
3046d50e 4445
0809e267 4446 }
3046d50e
JS		 4447
4448#ifndef CONFIG_CYZ_INTR
4449 if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4450 mod_timer(&cyz_timerlist, jiffies + 1);
4451#ifdef CY_PCI_DEBUG
4452 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4453#endif
4454 }
4455#endif
dd025c0c 4456 return 0;
0809e267
JS		 4457}
4458
1da177e4
LT		 4459/* initialize chips on Cyclom-Y card -- return number of valid
4460 chips (which is number of ports/4) */
31b4f0a1
JS		 4461static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4462 int index)
1da177e4 4463{
02f1175c
JS		 4464 unsigned int chip_number;
4465 void __iomem *base_addr;
4466
4467 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4468 /* Cy_HwReset is 0x1400 */
4469 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4470 /* Cy_ClrIntr is 0x1800 */
4471 udelay(500L);
4472
4473 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4474 base_addr =
4475 true_base_addr + (cy_chip_offset[chip_number] << index);
4476 mdelay(1);
db05c3b1 4477 if (readb(base_addr + (CyCCR << index)) != 0x00) {
02f1175c
JS		 4478 /*************
4479 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4480 chip_number, (unsigned long)base_addr);
4481 *************/
4482 return chip_number;
4483 }
4484
4485 cy_writeb(base_addr + (CyGFRCR << index), 0);
4486 udelay(10L);
4487
4488 /* The Cyclom-16Y does not decode address bit 9 and therefore
4489 cannot distinguish between references to chip 0 and a non-
4490 existent chip 4. If the preceding clearing of the supposed
4491 chip 4 GFRCR register appears at chip 0, there is no chip 4
4492 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4493 */
db05c3b1 4494 if (chip_number == 4 && readb(true_base_addr +
02f1175c
JS		 4495 (cy_chip_offset[0] << index) +
4496 (CyGFRCR << index)) == 0) {
4497 return chip_number;
4498 }
4499
4500 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4501 mdelay(1);
4502
db05c3b1 4503 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
02f1175c
JS		 4504 /*
4505 printk(" chip #%d at %#6lx is not responding ",
4506 chip_number, (unsigned long)base_addr);
4507 printk("(GFRCR stayed 0)\n",
4508 */
4509 return chip_number;
4510 }
db05c3b1 4511 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
02f1175c
JS		 4512 0x40) {
4513 /*
4514 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4515 "%#2x)\n",
4516 chip_number, (unsigned long)base_addr,
4517 base_addr[CyGFRCR<<index]);
4518 */
4519 return chip_number;
4520 }
4521 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
db05c3b1 4522 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
02f1175c
JS		 4523 /* It is a CD1400 rev. J or later */
4524 /* Impossible to reach 5ms with this chip.
4525 Changed to 2ms instead (f = 500 Hz). */
4526 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4527 } else {
4528 /* f = 200 Hz */
4529 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4530 }
1da177e4 4531
02f1175c
JS		 4532 /*
4533 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4534 chip_number, (unsigned long)base_addr,
db05c3b1 4535 readb(base_addr+(CyGFRCR<<index)));
02f1175c
JS		 4536 */
4537 }
4538 return chip_number;
4539} /* cyy_init_card */
1da177e4
LT		 4540
4541/*
4542 * ---------------------------------------------------------------------
4543 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4544 * sets global variables and return the number of ISA boards found.
4545 * ---------------------------------------------------------------------
4546 */
02f1175c 4547static int __init cy_detect_isa(void)
1da177e4
LT		 4548{
4549#ifdef CONFIG_ISA
02f1175c
JS		 4550 unsigned short cy_isa_irq, nboard;
4551 void __iomem *cy_isa_address;
4552 unsigned short i, j, cy_isa_nchan;
1da177e4 4553#ifdef MODULE
02f1175c 4554 int isparam = 0;
1da177e4
LT		 4555#endif
4556
02f1175c 4557 nboard = 0;
1da177e4
LT		 4558
4559#ifdef MODULE
4560 /* Check for module parameters */
02f1175c
JS		 4561 for (i = 0; i < NR_CARDS; i++) {
4562 if (maddr[i] || i) {
4563 isparam = 1;
4564 cy_isa_addresses[i] = maddr[i];
4565 }
4566 if (!maddr[i])
4567 break;
1da177e4
LT		 4568 }
4569#endif
4570
02f1175c
JS		 4571 /* scan the address table probing for Cyclom-Y/ISA boards */
4572 for (i = 0; i < NR_ISA_ADDRS; i++) {
4573 unsigned int isa_address = cy_isa_addresses[i];
4574 if (isa_address == 0x0000) {
096dcfce 4575 return nboard;
02f1175c 4576 }
1da177e4 4577
02f1175c 4578 /* probe for CD1400... */
1da177e4 4579 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
3137553d
JS		 4580 if (cy_isa_address == NULL) {
4581 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4582 "address\n");
4583 continue;
4584 }
02f1175c
JS		 4585 cy_isa_nchan = CyPORTS_PER_CHIP *
4586 cyy_init_card(cy_isa_address, 0);
4587 if (cy_isa_nchan == 0) {
3137553d 4588 iounmap(cy_isa_address);
02f1175c
JS		 4589 continue;
4590 }
1da177e4
LT		 4591#ifdef MODULE
4592 if (isparam && irq[i])
02f1175c 4593 cy_isa_irq = irq[i];
1da177e4
LT		 4594 else
4595#endif
02f1175c
JS		 4596 /* find out the board's irq by probing */
4597 cy_isa_irq = detect_isa_irq(cy_isa_address);
4598 if (cy_isa_irq == 0) {
21719191
JS		 4599 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4600 "IRQ could not be detected.\n",
02f1175c 4601 (unsigned long)cy_isa_address);
3137553d 4602 iounmap(cy_isa_address);
02f1175c
JS		 4603 continue;
4604 }
4605
4606 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
21719191
JS		 4607 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4608 "more channels are available. Change NR_PORTS "
4609 "in cyclades.c and recompile kernel.\n",
02f1175c 4610 (unsigned long)cy_isa_address);
3137553d 4611 iounmap(cy_isa_address);
096dcfce 4612 return nboard;
02f1175c
JS		 4613 }
4614 /* fill the next cy_card structure available */
4615 for (j = 0; j < NR_CARDS; j++) {
f7429034 4616 if (cy_card[j].base_addr == NULL)
02f1175c
JS		 4617 break;
4618 }
4619 if (j == NR_CARDS) { /* no more cy_cards available */
21719191
JS		 4620 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4621 "more cards can be used. Change NR_CARDS in "
4622 "cyclades.c and recompile kernel.\n",
02f1175c 4623 (unsigned long)cy_isa_address);
3137553d 4624 iounmap(cy_isa_address);
096dcfce 4625 return nboard;
02f1175c
JS		 4626 }
4627
4628 /* allocate IRQ */
4629 if (request_irq(cy_isa_irq, cyy_interrupt,
4630 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
21719191
JS		 4631 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4632 "could not allocate IRQ#%d.\n",
4633 (unsigned long)cy_isa_address, cy_isa_irq);
3137553d 4634 iounmap(cy_isa_address);
096dcfce 4635 return nboard;
02f1175c
JS		 4636 }
4637
4638 /* set cy_card */
4639 cy_card[j].base_addr = cy_isa_address;
4640 cy_card[j].ctl_addr = NULL;
4641 cy_card[j].irq = (int)cy_isa_irq;
4642 cy_card[j].bus_index = 0;
4643 cy_card[j].first_line = cy_next_channel;
4644 cy_card[j].num_chips = cy_isa_nchan / 4;
3137553d
JS		 4645 if (cy_init_card(&cy_card[j])) {
4646 cy_card[j].base_addr = NULL;
4647 free_irq(cy_isa_irq, &cy_card[j]);
4648 iounmap(cy_isa_address);
4649 continue;
4650 }
02f1175c
JS		 4651 nboard++;
4652
21719191
JS		 4653 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4654 "%d channels starting from port %d\n",
02f1175c
JS		 4655 j + 1, (unsigned long)cy_isa_address,
4656 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
21719191
JS		 4657 cy_isa_irq, cy_isa_nchan, cy_next_channel);
4658
6ad1ccc1
JS		 4659 for (j = cy_next_channel;
4660 j < cy_next_channel + cy_isa_nchan; j++)
4661 tty_register_device(cy_serial_driver, j, NULL);
02f1175c
JS		 4662 cy_next_channel += cy_isa_nchan;
4663 }
096dcfce 4664 return nboard;
1da177e4 4665#else
096dcfce 4666 return 0;
02f1175c
JS		 4667#endif /* CONFIG_ISA */
4668} /* cy_detect_isa */
1da177e4 4669
58936d8d 4670#ifdef CONFIG_PCI
054f5b0a
JS		 4671static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4672{
4673 unsigned int a;
4674
4675 for (a = 0; a < size && *str; a++, str++)
4676 if (*str & 0x80)
4677 return -EINVAL;
4678
4679 for (; a < size; a++, str++)
4680 if (*str)
4681 return -EINVAL;
4682
4683 return 0;
4684}
4685
4686static inline void __devinit cyz_fpga_copy(void __iomem *fpga, u8 *data,
4687 unsigned int size)
4688{
4689 for (; size > 0; size--) {
4690 cy_writel(fpga, *data++);
4691 udelay(10);
4692 }
4693}
4694
4695static void __devinit plx_init(struct pci_dev *pdev, int irq,
4696 struct RUNTIME_9060 __iomem *addr)
1da177e4 4697{
02f1175c 4698 /* Reset PLX */
054f5b0a 4699 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
02f1175c 4700 udelay(100L);
054f5b0a 4701 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
02f1175c
JS		 4702
4703 /* Reload Config. Registers from EEPROM */
054f5b0a 4704 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
02f1175c 4705 udelay(100L);
054f5b0a
JS		 4706 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4707
4708 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4709 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4710 * registers. This will remain here until we find a permanent fix.
4711 */
4712 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4713}
4714
4715static int __devinit __cyz_load_fw(const struct firmware *fw,
4716 const char *name, const u32 mailbox, void __iomem *base,
4717 void __iomem *fpga)
4718{
4719 void *ptr = fw->data;
4720 struct zfile_header *h = ptr;
4721 struct zfile_config *c, *cs;
4722 struct zfile_block *b, *bs;
4723 unsigned int a, tmp, len = fw->size;
4724#define BAD_FW KERN_ERR "Bad firmware: "
4725 if (len < sizeof(*h)) {
4726 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4727 return -EINVAL;
4728 }
4729
4730 cs = ptr + h->config_offset;
4731 bs = ptr + h->block_offset;
4732
4733 if ((void *)(cs + h->n_config) > ptr + len ||
4734 (void *)(bs + h->n_blocks) > ptr + len) {
4735 printk(BAD_FW "too short");
4736 return -EINVAL;
4737 }
4738
4739 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4740 cyc_isfwstr(h->date, sizeof(h->date))) {
4741 printk(BAD_FW "bad formatted header string\n");
4742 return -EINVAL;
4743 }
4744
4745 if (strncmp(name, h->name, sizeof(h->name))) {
4746 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4747 return -EINVAL;
4748 }
4749
4750 tmp = 0;
4751 for (c = cs; c < cs + h->n_config; c++) {
4752 for (a = 0; a < c->n_blocks; a++)
4753 if (c->block_list[a] > h->n_blocks) {
4754 printk(BAD_FW "bad block ref number in cfgs\n");
4755 return -EINVAL;
4756 }
4757 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4758 tmp++;
4759 }
4760 if (!tmp) {
4761 printk(BAD_FW "nothing appropriate\n");
4762 return -EINVAL;
4763 }
4764
4765 for (b = bs; b < bs + h->n_blocks; b++)
4766 if (b->file_offset + b->size > len) {
4767 printk(BAD_FW "bad block data offset\n");
4768 return -EINVAL;
4769 }
4770
4771 /* everything is OK, let's seek'n'load it */
4772 for (c = cs; c < cs + h->n_config; c++)
4773 if (c->mailbox == mailbox && c->function == 0)
4774 break;
4775
4776 for (a = 0; a < c->n_blocks; a++) {
4777 b = &bs[c->block_list[a]];
4778 if (b->type == ZBLOCK_FPGA) {
4779 if (fpga != NULL)
4780 cyz_fpga_copy(fpga, ptr + b->file_offset,
4781 b->size);
4782 } else {
4783 if (base != NULL)
4784 memcpy_toio(base + b->ram_offset,
4785 ptr + b->file_offset, b->size);
4786 }
4787 }
4788#undef BAD_FW
4789 return 0;
4790}
4791
4792static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4793 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4794{
4795 const struct firmware *fw;
4796 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4797 struct CUSTOM_REG __iomem *cust = base_addr;
4798 struct ZFW_CTRL __iomem *pt_zfwctrl;
c4923b4f 4799 void __iomem *tmp;
054f5b0a
JS		 4800 u32 mailbox, status;
4801 unsigned int i;
4802 int retval;
4803
4804 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4805 if (retval) {
4806 dev_err(&pdev->dev, "can't get firmware\n");
4807 goto err;
4808 }
4809
4810 /* Check whether the firmware is already loaded and running. If
4811 positive, skip this board */
4812 if (Z_FPGA_LOADED(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
4813 u32 cntval = readl(base_addr + 0x190);
4814
4815 udelay(100);
4816 if (cntval != readl(base_addr + 0x190)) {
4817 /* FW counter is working, FW is running */
4818 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4819 "Skipping board.\n");
4820 retval = 0;
4821 goto err_rel;
4822 }
4823 }
4824
4825 /* start boot */
4826 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4827 ~0x00030800UL);
4828
4829 mailbox = readl(&ctl_addr->mail_box_0);
4830
4831 if (mailbox == 0 || Z_FPGA_LOADED(ctl_addr)) {
4832 /* stops CPU and set window to beginning of RAM */
4833 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4834 cy_writel(&cust->cpu_stop, 0);
4835 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4836 udelay(100);
4837 }
4838
4839 plx_init(pdev, irq, ctl_addr);
4840
4841 if (mailbox != 0) {
4842 /* load FPGA */
4843 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4844 base_addr);
4845 if (retval)
4846 goto err_rel;
4847 if (!Z_FPGA_LOADED(ctl_addr)) {
4848 dev_err(&pdev->dev, "fw upload successful, but fw is "
4849 "not loaded\n");
4850 goto err_rel;
4851 }
4852 }
4853
4854 /* stops CPU and set window to beginning of RAM */
4855 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4856 cy_writel(&cust->cpu_stop, 0);
4857 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4858 udelay(100);
4859
4860 /* clear memory */
c4923b4f 4861 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
054f5b0a
JS		 4862 cy_writeb(tmp, 255);
4863 if (mailbox != 0) {
4864 /* set window to last 512K of RAM */
4865 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
4866 //sleep(1);
c4923b4f 4867 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
054f5b0a
JS		 4868 cy_writeb(tmp, 255);
4869 /* set window to beginning of RAM */
4870 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4871 //sleep(1);
4872 }
4873
4874 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4875 release_firmware(fw);
4876 if (retval)
4877 goto err;
4878
4879 /* finish boot and start boards */
4880 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4881 cy_writel(&cust->cpu_start, 0);
4882 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4883 i = 0;
4884 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4885 msleep(100);
4886 if (status != ZFIRM_ID) {
4887 if (status == ZFIRM_HLT) {
4888 dev_err(&pdev->dev, "you need an external power supply "
4889 "for this number of ports. Firmware halted and "
4890 "board reset.\n");
4891 retval = -EIO;
4892 goto err;
4893 }
4894 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4895 "some more time\n", status);
4896 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
4897 i++ < 200)
4898 msleep(100);
4899 if (status != ZFIRM_ID) {
4900 dev_err(&pdev->dev, "Board not started in 20 seconds! "
4901 "Giving up. (fid->signature = 0x%x)\n",
4902 status);
4903 dev_info(&pdev->dev, "*** Warning ***: if you are "
4904 "upgrading the FW, please power cycle the "
4905 "system before loading the new FW to the "
4906 "Cyclades-Z.\n");
4907
4908 if (Z_FPGA_LOADED(ctl_addr))
4909 plx_init(pdev, irq, ctl_addr);
4910
4911 retval = -EIO;
4912 goto err;
4913 }
4914 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
4915 i / 10);
4916 }
4917 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
4918
4919 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
4920 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
4921 base_addr + readl(&fid->zfwctrl_addr));
4922
4923 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
4924 readl(&pt_zfwctrl->board_ctrl.fw_version),
4925 readl(&pt_zfwctrl->board_ctrl.n_channel));
4926
4927 if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) {
4928 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
4929 "check the connection between the Z host card and the "
4930 "serial expanders.\n");
4931
4932 if (Z_FPGA_LOADED(ctl_addr))
4933 plx_init(pdev, irq, ctl_addr);
4934
4935 dev_info(&pdev->dev, "Null number of ports detected. Board "
4936 "reset.\n");
4937 retval = 0;
4938 goto err;
4939 }
4940
4941 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
4942 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
4943
4944 /*
4945 Early firmware failed to start looking for commands.
4946 This enables firmware interrupts for those commands.
4947 */
4948 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4949 (1 << 17));
4950 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4951 0x00030800UL);
4952
4953 plx_init(pdev, irq, ctl_addr);
4954
4955 return 0;
4956err_rel:
4957 release_firmware(fw);
4958err:
4959 return retval;
1da177e4
LT		 4960}
4961
58936d8d
JS		 4962static int __devinit cy_pci_probe(struct pci_dev *pdev,
4963 const struct pci_device_id *ent)
1da177e4 4964{
3137553d
JS		 4965 void __iomem *addr0 = NULL, *addr2 = NULL;
4966 char *card_name = NULL;
4967 u32 mailbox;
4968 unsigned int device_id, nchan = 0, card_no, i;
4969 unsigned char plx_ver;
4970 int retval, irq;
02f1175c 4971
58936d8d
JS		 4972 retval = pci_enable_device(pdev);
4973 if (retval) {
4974 dev_err(&pdev->dev, "cannot enable device\n");
3137553d 4975 goto err;
58936d8d 4976 }
1da177e4 4977
58936d8d 4978 /* read PCI configuration area */
3137553d 4979 irq = pdev->irq;
58936d8d 4980 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
1da177e4 4981
3137553d
JS		 4982#if defined(__alpha__)
4983 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4984 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
4985 "addresses on Alpha systems.\n");
4986 retval = -EIO;
4987 goto err_dis;
4988 }
4989#endif
4990 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4991 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
4992 "addresses\n");
4993 retval = -EIO;
4994 goto err_dis;
4995 }
4996
4997 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4998 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
4999 "it...\n");
5000 pdev->resource[2].flags &= ~IORESOURCE_IO;
5001 }
5002
5003 retval = pci_request_regions(pdev, "cyclades");
5004 if (retval) {
5005 dev_err(&pdev->dev, "failed to reserve resources\n");
5006 goto err_dis;
5007 }
5008
5009 retval = -EIO;
58936d8d
JS		 5010 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5011 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3137553d 5012 card_name = "Cyclom-Y";
1da177e4 5013
3137553d
JS		 5014 addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
5015 if (addr0 == NULL) {
5016 dev_err(&pdev->dev, "can't remap ctl region\n");
5017 goto err_reg;
58936d8d 5018 }
3137553d
JS		 5019 addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
5020 if (addr2 == NULL) {
5021 dev_err(&pdev->dev, "can't remap base region\n");
5022 goto err_unmap;
58936d8d 5023 }
1da177e4 5024
3137553d
JS		 5025 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
5026 if (nchan == 0) {
21719191
JS		 5027 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
5028 "Serial-Modules\n");
58936d8d
JS		 5029 return -EIO;
5030 }
58936d8d 5031 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
3137553d 5032 struct RUNTIME_9060 __iomem *ctl_addr;
21719191 5033
3137553d
JS		 5034 ctl_addr = addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
5035 if (addr0 == NULL) {
5036 dev_err(&pdev->dev, "can't remap ctl region\n");
5037 goto err_reg;
5038 }
58936d8d
JS		 5039
5040 /* Disable interrupts on the PLX before resetting it */
054f5b0a 5041 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900);
58936d8d 5042
054f5b0a 5043 plx_init(pdev, irq, addr0);
02f1175c 5044
3137553d 5045 mailbox = (u32)readl(&ctl_addr->mail_box_0);
58936d8d 5046
3137553d
JS		 5047 addr2 = pci_iomap(pdev, 2, mailbox == ZE_V1 ?
5048 CyPCI_Ze_win : CyPCI_Zwin);
5049 if (addr2 == NULL) {
5050 dev_err(&pdev->dev, "can't remap base region\n");
5051 goto err_unmap;
58936d8d
JS		 5052 }
5053
5054 if (mailbox == ZE_V1) {
3137553d
JS		 5055 card_name = "Cyclades-Ze";
5056
5057 readl(&ctl_addr->mail_box_0);
5058 nchan = ZE_V1_NPORTS;
58936d8d 5059 } else {
3137553d 5060 card_name = "Cyclades-8Zo";
1da177e4
LT		 5061
5062#ifdef CY_PCI_DEBUG
3137553d
JS		 5063 if (mailbox == ZO_V1) {
5064 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5065 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5066 "id %lx, ver %lx\n", (ulong)(0xff &
5067 readl(&((struct CUSTOM_REG *)addr2)->
5068 fpga_id)), (ulong)(0xff &
5069 readl(&((struct CUSTOM_REG *)addr2)->
5070 fpga_version)));
5071 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5072 } else {
5073 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5074 "Cyclades-Z board. FPGA not loaded\n");
5075 }
1da177e4 5076#endif
3137553d
JS		 5077 /* The following clears the firmware id word. This
5078 ensures that the driver will not attempt to talk to
5079 the board until it has been properly initialized.
5080 */
5081 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5082 cy_writel(addr2 + ID_ADDRESS, 0L);
1da177e4 5083
054f5b0a
JS		 5084 retval = cyz_load_fw(pdev, addr2, addr0, irq);
5085 if (retval)
5086 goto err_unmap;
3137553d
JS		 5087 /* This must be a Cyclades-8Zo/PCI. The extendable
5088 version will have a different device_id and will
5089 be allocated its maximum number of ports. */
5090 nchan = 8;
58936d8d 5091 }
3137553d
JS		 5092 }
5093
5094 if ((cy_next_channel + nchan) > NR_PORTS) {
5095 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5096 "channels are available. Change NR_PORTS in "
5097 "cyclades.c and recompile kernel.\n");
5098 goto err_unmap;
5099 }
5100 /* fill the next cy_card structure available */
5101 for (card_no = 0; card_no < NR_CARDS; card_no++) {
5102 if (cy_card[card_no].base_addr == NULL)
5103 break;
5104 }
5105 if (card_no == NR_CARDS) { /* no more cy_cards available */
5106 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5107 "more cards can be used. Change NR_CARDS in "
5108 "cyclades.c and recompile kernel.\n");
5109 goto err_unmap;
5110 }
5111
5112 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5113 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5114 /* allocate IRQ */
5115 retval = request_irq(irq, cyy_interrupt,
5116 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5117 if (retval) {
5118 dev_err(&pdev->dev, "could not allocate IRQ\n");
5119 goto err_unmap;
58936d8d 5120 }
3137553d
JS		 5121 cy_card[card_no].num_chips = nchan / 4;
5122 } else {
02f1175c 5123#ifdef CONFIG_CYZ_INTR
58936d8d 5124 /* allocate IRQ only if board has an IRQ */
3137553d
JS		 5125 if (irq != 0 && irq != 255) {
5126 retval = request_irq(irq, cyz_interrupt,
58936d8d 5127 IRQF_SHARED, "Cyclades-Z",
3137553d 5128 &cy_card[card_no]);
58936d8d 5129 if (retval) {
21719191 5130 dev_err(&pdev->dev, "could not allocate IRQ\n");
3137553d 5131 goto err_unmap;
02f1175c 5132 }
58936d8d 5133 }
02f1175c 5134#endif /* CONFIG_CYZ_INTR */
3137553d
JS		 5135 cy_card[card_no].num_chips = -1;
5136 }
02f1175c 5137
3137553d
JS		 5138 /* set cy_card */
5139 cy_card[card_no].base_addr = addr2;
5140 cy_card[card_no].ctl_addr = addr0;
5141 cy_card[card_no].irq = irq;
5142 cy_card[card_no].bus_index = 1;
5143 cy_card[card_no].first_line = cy_next_channel;
5144 retval = cy_init_card(&cy_card[card_no]);
5145 if (retval)
5146 goto err_null;
58936d8d 5147
3137553d 5148 pci_set_drvdata(pdev, &cy_card[card_no]);
58936d8d 5149
3137553d
JS		 5150 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5151 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5152 /* enable interrupts in the PCI interface */
5153 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
5154 switch (plx_ver) {
5155 case PLX_9050:
5156
5157 cy_writeb(addr0 + 0x4c, 0x43);
5158 break;
5159
5160 case PLX_9060:
5161 case PLX_9080:
5162 default: /* Old boards, use PLX_9060 */
054f5b0a 5163 plx_init(pdev, irq, addr0);
3137553d
JS		 5164 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900);
5165 break;
5166 }
58936d8d
JS		 5167 }
5168
3137553d
JS		 5169 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5170 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5171 for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5172 tty_register_device(cy_serial_driver, i, &pdev->dev);
5173 cy_next_channel += nchan;
5174
58936d8d 5175 return 0;
3137553d
JS		 5176err_null:
5177 cy_card[card_no].base_addr = NULL;
5178 free_irq(irq, &cy_card[card_no]);
5179err_unmap:
5180 pci_iounmap(pdev, addr0);
5181 if (addr2)
5182 pci_iounmap(pdev, addr2);
5183err_reg:
5184 pci_release_regions(pdev);
5185err_dis:
5186 pci_disable_device(pdev);
5187err:
5188 return retval;
58936d8d 5189}
58936d8d 5190
6747cd93 5191static void __devexit cy_pci_remove(struct pci_dev *pdev)
58936d8d 5192{
38d09093 5193 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
f3851e73 5194 unsigned int i;
38d09093 5195
85c93fa9 5196 /* non-Z with old PLX */
c2ad4c75
JS		 5197 if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5198 PLX_9050)
85c93fa9
JS		 5199 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5200 else
5201#ifndef CONFIG_CYZ_INTR
c2ad4c75 5202 if (!IS_CYC_Z(*cinfo))
85c93fa9
JS		 5203#endif
5204 cy_writew(cinfo->ctl_addr + 0x68,
5205 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5206
38d09093
JS		 5207 pci_iounmap(pdev, cinfo->base_addr);
5208 if (cinfo->ctl_addr)
5209 pci_iounmap(pdev, cinfo->ctl_addr);
5210 if (cinfo->irq
5211#ifndef CONFIG_CYZ_INTR
c2ad4c75 5212 && !IS_CYC_Z(*cinfo)
38d09093
JS		 5213#endif /* CONFIG_CYZ_INTR */
5214 )
5215 free_irq(cinfo->irq, cinfo);
5216 pci_release_regions(pdev);
5217
5218 cinfo->base_addr = NULL;
6ad1ccc1
JS		 5219 for (i = cinfo->first_line; i < cinfo->first_line +
5220 cinfo->nports; i++)
5221 tty_unregister_device(cy_serial_driver, i);
dd025c0c
JS		 5222 cinfo->nports = 0;
5223 kfree(cinfo->ports);
38d09093
JS		 5224}
5225
6747cd93
JS		 5226static struct pci_driver cy_pci_driver = {
5227 .name = "cyclades",
5228 .id_table = cy_pci_dev_id,
5229 .probe = cy_pci_probe,
5230 .remove = __devexit_p(cy_pci_remove)
5231};
5232#endif
5233
02f1175c 5234static int
1da177e4 5235cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
02f1175c 5236 int *eof, void *data)
1da177e4 5237{
02f1175c 5238 struct cyclades_port *info;
dd025c0c 5239 unsigned int i, j;
02f1175c
JS		 5240 int len = 0;
5241 off_t begin = 0;
5242 off_t pos = 0;
5243 int size;
5244 __u32 cur_jifs = jiffies;
5245
5246 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5247 "IdleIn Overruns Ldisc\n");
5248
5249 pos += size;
1da177e4 5250 len += size;
1da177e4 5251
02f1175c 5252 /* Output one line for each known port */
dd025c0c
JS		 5253 for (i = 0; i < NR_CARDS; i++)
5254 for (j = 0; j < cy_card[i].nports; j++) {
5255 info = &cy_card[i].ports[j];
5256
5257 if (info->count)
5258 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5259 "%10lu %8lu %9lu %6ld\n", info->line,
5260 (cur_jifs - info->idle_stats.in_use) /
5261 HZ, info->idle_stats.xmit_bytes,
5262 (cur_jifs - info->idle_stats.xmit_idle)/
5263 HZ, info->idle_stats.recv_bytes,
5264 (cur_jifs - info->idle_stats.recv_idle)/
5265 HZ, info->idle_stats.overruns,
5266 (long)info->tty->ldisc.num);
5267 else
5268 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5269 "%10lu %8lu %9lu %6ld\n",
5270 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5271 len += size;
5272 pos = begin + len;
5273
5274 if (pos < offset) {
5275 len = 0;
5276 begin = pos;
5277 }
5278 if (pos > offset + length)
5279 goto done;
02f1175c 5280 }
02f1175c 5281 *eof = 1;
1da177e4 5282done:
02f1175c
JS		 5283 *start = buf + (offset - begin); /* Start of wanted data */
5284 len -= (offset - begin); /* Start slop */
5285 if (len > length)
5286 len = length; /* Ending slop */
5287 if (len < 0)
5288 len = 0;
5289 return len;
1da177e4
LT		 5290}
5291
5292/* The serial driver boot-time initialization code!
5293 Hardware I/O ports are mapped to character special devices on a
5294 first found, first allocated manner. That is, this code searches
5295 for Cyclom cards in the system. As each is found, it is probed
5296 to discover how many chips (and thus how many ports) are present.
5297 These ports are mapped to the tty ports 32 and upward in monotonic
5298 fashion. If an 8-port card is replaced with a 16-port card, the
5299 port mapping on a following card will shift.
5300
5301 This approach is different from what is used in the other serial
5302 device driver because the Cyclom is more properly a multiplexer,
5303 not just an aggregation of serial ports on one card.
5304
5305 If there are more cards with more ports than have been
5306 statically allocated above, a warning is printed and the
5307 extra ports are ignored.
5308 */
5309
b68e31d0 5310static const struct tty_operations cy_ops = {
02f1175c
JS		 5311 .open = cy_open,
5312 .close = cy_close,
5313 .write = cy_write,
5314 .put_char = cy_put_char,
5315 .flush_chars = cy_flush_chars,
5316 .write_room = cy_write_room,
5317 .chars_in_buffer = cy_chars_in_buffer,
5318 .flush_buffer = cy_flush_buffer,
5319 .ioctl = cy_ioctl,
5320 .throttle = cy_throttle,
5321 .unthrottle = cy_unthrottle,
5322 .set_termios = cy_set_termios,
5323 .stop = cy_stop,
5324 .start = cy_start,
5325 .hangup = cy_hangup,
5326 .break_ctl = cy_break,
5327 .wait_until_sent = cy_wait_until_sent,
5328 .read_proc = cyclades_get_proc_info,
5329 .tiocmget = cy_tiocmget,
5330 .tiocmset = cy_tiocmset,
1da177e4
LT		 5331};
5332
02f1175c 5333static int __init cy_init(void)
1da177e4 5334{
dd025c0c 5335 unsigned int nboards;
9dacf3b2 5336 int retval = -ENOMEM;
02f1175c
JS		 5337
5338 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5339 if (!cy_serial_driver)
9dacf3b2 5340 goto err;
21719191
JS		 5341
5342 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5343 __DATE__, __TIME__);
02f1175c
JS		 5344
5345 /* Initialize the tty_driver structure */
5346
5347 cy_serial_driver->owner = THIS_MODULE;
5348 cy_serial_driver->driver_name = "cyclades";
5349 cy_serial_driver->name = "ttyC";
5350 cy_serial_driver->major = CYCLADES_MAJOR;
5351 cy_serial_driver->minor_start = 0;
5352 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5353 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5354 cy_serial_driver->init_termios = tty_std_termios;
5355 cy_serial_driver->init_termios.c_cflag =
5356 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
6ad1ccc1 5357 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
02f1175c
JS		 5358 tty_set_operations(cy_serial_driver, &cy_ops);
5359
9dacf3b2
JS		 5360 retval = tty_register_driver(cy_serial_driver);
5361 if (retval) {
5362 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5363 goto err_frtty;
5364 }
02f1175c 5365
02f1175c
JS		 5366 /* the code below is responsible to find the boards. Each different
5367 type of board has its own detection routine. If a board is found,
5368 the next cy_card structure available is set by the detection
5369 routine. These functions are responsible for checking the
5370 availability of cy_card and cy_port data structures and updating
5371 the cy_next_channel. */
5372
5373 /* look for isa boards */
14a55a67 5374 nboards = cy_detect_isa();
02f1175c 5375
6747cd93 5376#ifdef CONFIG_PCI
02f1175c 5377 /* look for pci boards */
6747cd93
JS		 5378 retval = pci_register_driver(&cy_pci_driver);
5379 if (retval && !nboards)
9dacf3b2 5380 goto err_unr;
6747cd93 5381#endif
9dacf3b2
JS		 5382
5383 return 0;
5384err_unr:
5385 tty_unregister_driver(cy_serial_driver);
5386err_frtty:
5387 put_tty_driver(cy_serial_driver);
5388err:
5389 return retval;
02f1175c 5390} /* cy_init */
1da177e4 5391
02f1175c 5392static void __exit cy_cleanup_module(void)
1da177e4 5393{
dd025c0c 5394 struct cyclades_card *card;
02f1175c 5395 int i, e1;
1da177e4
LT		 5396
5397#ifndef CONFIG_CYZ_INTR
b7050906 5398 del_timer_sync(&cyz_timerlist);
1da177e4
LT		 5399#endif /* CONFIG_CYZ_INTR */
5400
02f1175c 5401 if ((e1 = tty_unregister_driver(cy_serial_driver)))
21719191
JS		 5402 printk(KERN_ERR "failed to unregister Cyclades serial "
5403 "driver(%d)\n", e1);
1da177e4 5404
6747cd93
JS		 5405#ifdef CONFIG_PCI
5406 pci_unregister_driver(&cy_pci_driver);
5407#endif
5408
02f1175c 5409 for (i = 0; i < NR_CARDS; i++) {
dd025c0c
JS		 5410 card = &cy_card[i];
5411 if (card->base_addr) {
85c93fa9 5412 /* clear interrupt */
dd025c0c
JS		 5413 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5414 iounmap(card->base_addr);
5415 if (card->ctl_addr)
5416 iounmap(card->ctl_addr);
5417 if (card->irq
1da177e4 5418#ifndef CONFIG_CYZ_INTR
dd025c0c 5419 && !IS_CYC_Z(*card)
1da177e4 5420#endif /* CONFIG_CYZ_INTR */
02f1175c 5421 )
dd025c0c
JS		 5422 free_irq(card->irq, card);
5423 for (e1 = card->first_line;
5424 e1 < card->first_line +
5425 card->nports; e1++)
6ad1ccc1 5426 tty_unregister_device(cy_serial_driver, e1);
dd025c0c 5427 kfree(card->ports);
02f1175c
JS		 5428 }
5429 }
f2462bfe
JS		 5430
5431 put_tty_driver(cy_serial_driver);
1da177e4
LT		 5432} /* cy_cleanup_module */
5433
5434module_init(cy_init);
5435module_exit(cy_cleanup_module);
5436
5437MODULE_LICENSE("GPL");
c8e1693a 5438MODULE_VERSION(CY_VERSION);
Linux 6.x block layer and io_uring tree(s)