projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
drivers/char/ds1286.c: use time_before, time_before_eq, etc
[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 *
1da177e4
LT		 24 * Prevent users from opening non-existing Z ports.
25 *
26 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
27 * Fixed the PCI detection function to work properly on Alpha systems.
28 * Implemented support for TIOCSERGETLSR ioctl.
29 * Implemented full support for non-standard baud rates.
30 *
31 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
32 * Request PLX I/O region, although driver doesn't use it, to avoid
33 * problems with other drivers accessing it.
34 * Removed count for on-board buffer characters in cy_chars_in_buffer
35 * (Cyclades-Z only).
36 *
37 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
38 * Driver now reports physical instead of virtual memory addresses.
39 * Masks were added to some Cyclades-Z read accesses.
40 * Implemented workaround for PLX9050 bug that would cause a system lockup
41 * in certain systems, depending on the MMIO addresses allocated to the
42 * board.
43 * Changed the Tx interrupt programming in the CD1400 chips to boost up
44 * performance (Cyclom-Y only).
45 * Code is now compliant with the new module interface (module_[init|exit]).
46 * Make use of the PCI helper functions to access PCI resources.
47 * Did some code "housekeeping".
48 *
49 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
50 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
51 *
52 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
53 * Fixed SMP locking in Cyclom-Y interrupt handler.
54 *
55 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
56 * Added a new cyclades_card field called nports to allow the driver to
57 * know the exact number of ports found by the Z firmware after its load;
58 * RX buffer contention prevention logic on interrupt op mode revisited
59 * (Cyclades-Z only);
60 * Revisited printk's for Z debug;
61 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
62 *
63 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
15ed6cc0 64 * Fixed bug in cyz_poll that would make all ports but port 0
1da177e4
LT		 65 * unable to transmit/receive data (Cyclades-Z only);
66 * Implemented logic to prevent the RX buffer from being stuck with data
67 * due to a driver / firmware race condition in interrupt op mode
68 * (Cyclades-Z only);
69 * Fixed bug in block_til_ready logic that would lead to a system crash;
70 * Revisited cy_close spinlock usage;
71 *
72 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
73 * Revisited CONFIG_PCI conditional compilation for PCI board support;
74 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
75 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
76 * Removed CTS handling from the driver -- this is now completely handled
77 * by the firmware (Cyclades-Z only);
78 * Flush RX on-board buffers on a port open (Cyclades-Z only);
79 * Fixed handling of ASYNC_SPD_* TTY flags;
80 * Module unload now unmaps all memory area allocated by ioremap;
81 *
82 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
83 * Removed CY_PROC conditional compilation;
84 * Implemented SMP-awareness for the driver;
15ed6cc0 85 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
1da177e4
LT		 86 * functions;
87 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
88 * (irq=NN) as parameters (only for ISA boards);
15ed6cc0 89 * Fixed bug in set_line_char that would prevent the Cyclades-Z
1da177e4
LT		 90 * ports from being configured at speeds above 115.2Kbps;
91 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
92 * switching from working properly;
15ed6cc0 93 * The driver now only prints IRQ info for the Cyclades-Z if it's
1da177e4
LT		 94 * configured to work in interrupt mode;
95 *
96 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
97 * Added support for interrupt mode operation for the Z cards;
98 * Removed the driver inactivity control for the Z;
15ed6cc0 99 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
1da177e4 100 * the Z firmware is not loaded yet;
15ed6cc0 101 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
1da177e4 102 * same functionality;
15ed6cc0 103 * Implemented workaround for IRQ setting loss on the PCI configuration
1da177e4
LT		 104 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
105 *
106 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
107 * /proc entry location changed to /proc/tty/driver/cyclades;
108 * Added support to shared IRQ's (only for PCI boards);
109 * Added support for Cobalt Qube2 systems;
110 * IRQ [de]allocation scheme revisited;
111 * BREAK implementation changed in order to make use of the 'break_ctl'
112 * TTY facility;
113 * Fixed typo in TTY structure field 'driver_name';
15ed6cc0 114 * Included a PCI bridge reset and EEPROM reload in the board
1da177e4
LT		 115 * initialization code (for both Y and Z series).
116 *
117 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
15ed6cc0 118 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
1da177e4
LT		 119 * closed properly after a SIGINT;
120 * Module usage counter scheme revisited;
121 * Added support to the upcoming Y PCI boards (i.e., support to additional
122 * PCI Device ID's).
15ed6cc0 123 *
1da177e4
LT		 124 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
125 * Removed all unnecessary page-alignement operations in ioremap calls
126 * (ioremap is currently safe for these operations).
127 *
128 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
15ed6cc0 129 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
1da177e4
LT		 130 * order to make PLX9050-based boards work with certain motherboards.
131 *
132 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
133 * cy_close function now resets (correctly) the tty->closing flag;
134 * JIFFIES_DIFF macro fixed.
135 *
136 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
137 * Fixed bug in cy_close function, which was not informing HW of
138 * which port should have the reception disabled before doing so;
139 * fixed Cyclom-8YoP hardware detection bug.
140 *
141 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
142 * Fixed bug in cy_close function, which causes malfunction
143 * of one of the first 4 ports when a higher port is closed
144 * (Cyclom-Y only).
145 *
146 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
147 * Fixed Cyclom-4Yo hardware detection bug.
148 *
149 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
15ed6cc0 150 * /proc/cyclades implementation with great collaboration of
1da177e4
LT		 151 * Marc Lewis <marc@blarg.net>;
152 * cyy_interrupt was changed to avoid occurrence of kernel oopses
153 * during PPP operation.
154 *
155 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
156 * General code review in order to comply with 2.1 kernel standards;
157 * data loss prevention for slow devices revisited (cy_wait_until_sent
158 * was created);
15ed6cc0 159 * removed conditional compilation for new/old PCI structure support
1da177e4
LT		 160 * (now the driver only supports the new PCI structure).
161 *
162 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
163 * added conditional compilation for new/old PCI structure support;
164 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
165 *
166 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
167 * cleaned up the data loss fix;
168 * fixed XON/XOFF handling once more (Cyclades-Z);
169 * general review of the driver routines;
15ed6cc0 170 * introduction of a mechanism to prevent data loss with slow
1da177e4
LT		 171 * printers, by forcing a delay before closing the port.
172 *
173 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
174 * fixed detection/handling of new CD1400 in Ye boards;
175 * fixed XON/XOFF handling (Cyclades-Z);
176 * fixed data loss caused by a premature port close;
177 * introduction of a flag that holds the CD1400 version ID per port
178 * (used by the CYGETCD1400VER new ioctl).
179 *
180 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
181 * Code review for the module cleanup routine;
182 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
183 * includes anonymous changes regarding signal_pending.
15ed6cc0 184 *
1da177e4
LT		 185 * Revision 2.1 1997/11/01 17:42:41 ivan
186 * Changes in the driver to support Alpha systems (except 8Zo V_1);
187 * BREAK fix for the Cyclades-Z boards;
188 * driver inactivity control by FW implemented;
15ed6cc0 189 * introduction of flag that allows driver to take advantage of
1da177e4
LT		 190 * a special CD1400 feature related to HW flow control;
191 * added support for the CD1400 rev. J (Cyclom-Y boards);
192 * introduction of ioctls to:
193 * - control the rtsdtr_inv flag (Cyclom-Y);
194 * - control the rflow flag (Cyclom-Y);
195 * - adjust the polling interval (Cyclades-Z);
196 *
197 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
15ed6cc0 198 * Fixes related to kernel version conditional
1da177e4 199 * compilation.
15ed6cc0 200 *
1da177e4 201 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
15ed6cc0 202 * Compatibility issues between kernels 2.0.x and
1da177e4 203 * 2.1.x (mainly related to clear_bit function).
15ed6cc0 204 *
1da177e4 205 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
15ed6cc0 206 * Changes to define the memory window according to the
1da177e4 207 * board type.
15ed6cc0 208 *
1da177e4
LT		 209 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
210 * Changes to support new cycladesZ boards.
211 *
212 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
213 * Merge of Bentson's and Daniel's version 1.36.4.28.
214 * Corrects bug in cy_detect_pci: check if there are more
215 * ports than the number of static structs allocated.
216 * Warning message during initialization if this driver is
217 * used with the new generation of cycladesZ boards. Those
218 * will be supported only in next release of the driver.
219 * Corrects bug in cy_detect_pci and cy_detect_isa that
220 * returned wrong number of VALID boards, when a cyclomY
221 * was found with no serial modules connected.
222 * Changes to use current (2.1.x) kernel subroutine names
223 * and created macros for compilation with 2.0.x kernel,
224 * instead of the other way around.
225 *
226 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
227 * Change queue_task_irq_off to queue_task_irq.
228 * The inline function queue_task_irq_off (tqueue.h)
229 * was removed from latest releases of 2.1.x kernel.
230 * Use of macro __init to mark the initialization
231 * routines, so memory can be reused.
232 * Also incorporate implementation of critical region
233 * in function cleanup_module() created by anonymous
234 * linuxer.
235 *
236 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
237 * Change to support new firmware that solves DCD problem:
238 * application could fail to receive SIGHUP signal when DCD
239 * varying too fast.
240 *
241 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
242 * Changed for support linux versions 2.1.X.
243 * Backward compatible with linux versions 2.0.X.
244 * Corrected illegal use of filler field in
245 * CH_CTRL struct.
246 * Deleted some debug messages.
247 *
248 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
249 * Included check for NULL tty pointer in cyz_poll.
250 *
251 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
252 * Bill Foster at Blarg! Online services noticed that
253 * some of the switch elements of -Z modem control
254 * lacked a closing "break;"
255 *
256 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
257 * Changed low water threshold for buffer xmit_buf
258 *
259 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
260 * Marcio provided fix to modem status fetch for -Z
261 *
262 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
263 * improve mapping of -Z control page (thanks to Steve
264 * Price <stevep@fa.tdktca.com> for help on this)
265 *
266 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
267 * shift from CPU-bound to memcopy in cyz_polling operation
268 *
269 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
270 * Added support to set and report higher speeds.
271 *
272 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
273 * Some fixes in the HW flow control for the BETA release.
274 * Don't try to register the IRQ.
275 *
276 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
277 * make sure "cyc" appears in all kernel messages; all soft interrupts
278 * handled by same routine; recognize out-of-band reception; comment
279 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
33430dc5 280 * fix race condition in -Z buffer management; only -Y needs to explicitly
1da177e4
LT		 281 * flush chars; tidy up some startup messages;
282 *
283 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
284 * shift MOD_INC_USE_COUNT location to match
285 * serial.c; purge some diagnostic messages;
286 *
287 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
288 * enable modem status messages and fetch & process them; note
289 * time of last activity type for each port; set_line_char now
290 * supports more than line 0 and treats 0 baud correctly;
291 * get_modem_info senses rs_status;
292 *
293 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
294 * barely works--now's time to turn on
295 * more features 'til it breaks
296 *
297 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
298 * check more -Z board status; shorten boot message
299 *
300 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
301 * fix reference to ch_ctrl in startup; verify return
302 * values from cyz_issue_cmd and cyz_update_channel;
303 * more stuff to get modem control correct;
304 *
305 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
306 * more -Z stuff folded in; re-order changes to put -Z stuff
307 * after -Y stuff (to make changes clearer)
308 *
309 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
310 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
311 * Add code to send break. Clear firmware ID word at startup (so
312 * that other code won't talk to inactive board).
313 *
314 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
315 * add code for -Z in set_line_char
316 *
317 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
318 * fold more -Z stuff (or in some cases, error messages)
319 * into driver; add text to "don't know what to do" messages.
320 *
321 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
322 * moved compile-time flags near top of file; cosmetic changes
323 * to narrow text (to allow 2-up printing); changed many declarations
324 * to "static" to limit external symbols; shuffled code order to
325 * coalesce -Y and -Z specific code, also to put internal functions
326 * in order of tty_driver structure; added code to recognize -Z
327 * ports (and for moment, do nothing or report error); add cy_startup
328 * to parse boot command line for extra base addresses for ISA probes;
329 *
330 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
331 * reorder some code, fix types of some vars (int vs. long),
332 * add cy_setup to support user declared ISA addresses
333 *
334 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
335 * dump ioctl based firmware load (it's now a user level
336 * program); ensure uninitialzed ports cannot be used
337 *
338 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
339 * rename vars and restructure some code
340 *
341 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
342 * get right status back after boot load
343 *
344 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
345 * successfully loads firmware
346 *
347 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
348 * add more of the code for the boot/load ioctls
349 *
350 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
351 * start to add Z functionality--starting with ioctl
352 * for loading firmware
353 *
354 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
355 * added code to recognize Z/PCI card at initialization; report
356 * presence, but card is not initialized (because firmware needs
357 * to be loaded)
358 *
359 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
360 * starting minor number at zero; added missing verify_area
96de0e25 361 * as noted by Heiko Eißfeldt <heiko@colossus.escape.de>
1da177e4
LT		 362 *
363 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
364 * remove unneeded boot message & fix CLOCAL hardware flow
365 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
366 * remove unused diagnostic statements; minor 0 is first;
367 *
368 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
369 * The kernel function vremap (available only in later 1.3.xx kernels)
370 * allows the access to memory addresses above the RAM. This revision
371 * of the driver supports PCI boards below 1Mb (device id 0x100) and
372 * above 1Mb (device id 0x101).
373 *
374 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
375 * Some global changes to interrupt handling spilled into
376 * this driver--mostly unused arguments in system function
377 * calls. Also added change by Marcio Saito which should
378 * reduce lost interrupts at startup by fast processors.
379 *
380 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
381 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
382 * in 1.3.41 kernel to remove a possible race condition, extend
383 * some error messages, and let the driver run as a loadable module
384 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
385 * possible race condition.
386 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
387 *
388 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
389 * Changes by Linus Torvalds in 1.3.33 kernel distribution
390 * required due to reordering of driver initialization.
391 * Drivers are now initialized *after* memory management.
392 *
393 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
394 * remove printk from ISR; fix typo
395 *
396 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
397 * Minor fixes in the PCI board support. PCI function calls in
398 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
399 * <duncan@okay.com>. "bad serial count" message removed.
400 *
401 * Revision 1.36.3 1995/08/22 09:19:42 marcio
402 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
403 * board initialization. Changes in the boot messages. The driver
404 * supports up to 4 boards and 64 ports by default.
405 *
406 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
407 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
408 *
409 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
410 * add missing break in modem control block in ioctl switch statement
411 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
412 *
413 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
414 * make sure CTS flow control is set as soon as possible (thanks
415 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
416 *
417 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
418 * initialize defaults for receive threshold and stale data timeout;
419 * cosmetic changes;
420 *
421 * Revision 1.36 1995/03/10 23:33:53 bentson
422 * added support of chips 4-7 in 32 port Cyclom-Ye;
423 * fix cy_interrupt pointer dereference problem
424 * (Joe Portman <baron@aa.net>);
425 * give better error response if open is attempted on non-existent port
426 * (Zachariah Vaum <jchryslr@netcom.com>);
427 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
428 * conditional compilation for -16Y on systems with fast, noisy bus;
429 * comment out diagnostic print function;
430 * cleaned up table of base addresses;
431 * set receiver time-out period register to correct value,
432 * set receive threshold to better default values,
433 * set chip timer to more accurate 200 Hz ticking,
434 * add code to monitor and modify receive parameters
435 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
436 * <njs@scifi.emi.net>);
437 *
438 * Revision 1.35 1994/12/16 13:54:18 steffen
439 * additional patch by Marcio Saito for board detection
440 * Accidently left out in 1.34
441 *
442 * Revision 1.34 1994/12/10 12:37:12 steffen
443 * This is the corrected version as suggested by Marcio Saito
444 *
445 * Revision 1.33 1994/12/01 22:41:18 bentson
446 * add hooks to support more high speeds directly; add tytso
447 * patch regarding CLOCAL wakeups
448 *
449 * Revision 1.32 1994/11/23 19:50:04 bentson
450 * allow direct kernel control of higher signalling rates;
451 * look for cards at additional locations
452 *
453 * Revision 1.31 1994/11/16 04:33:28 bentson
454 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
455 * a problem in chars_in_buffer has been resolved by some
456 * small changes; this should yield smoother output
457 *
458 * Revision 1.30 1994/11/16 04:28:05 bentson
459 * Fix from Corey Minyard, Internet: minyard@metronet.com,
460 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
461 * cy_hangup that appears to clear up much (all?) of the
462 * DTR glitches; also he's added/cleaned-up diagnostic messages
463 *
464 * Revision 1.29 1994/11/16 04:16:07 bentson
465 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
466 * operate higher speeds in same way as other serial ports;
467 * add more serial ports (for up to two 16-port muxes).
468 *
469 * Revision 1.28 1994/11/04 00:13:16 root
470 * turn off diagnostic messages
471 *
472 * Revision 1.27 1994/11/03 23:46:37 root
473 * bunch of changes to bring driver into greater conformance
474 * with the serial.c driver (looking for missed fixes)
475 *
476 * Revision 1.26 1994/11/03 22:40:36 root
477 * automatic interrupt probing fixed.
478 *
479 * Revision 1.25 1994/11/03 20:17:02 root
480 * start to implement auto-irq
481 *
482 * Revision 1.24 1994/11/03 18:01:55 root
483 * still working on modem signals--trying not to drop DTR
484 * during the getty/login processes
485 *
486 * Revision 1.23 1994/11/03 17:51:36 root
487 * extend baud rate support; set receive threshold as function
488 * of baud rate; fix some problems with RTS/CTS;
489 *
490 * Revision 1.22 1994/11/02 18:05:35 root
491 * changed arguments to udelay to type long to get
492 * delays to be of correct duration
493 *
494 * Revision 1.21 1994/11/02 17:37:30 root
495 * employ udelay (after calibrating loops_per_second earlier
496 * in init/main.c) instead of using home-grown delay routines
497 *
498 * Revision 1.20 1994/11/02 03:11:38 root
499 * cy_chars_in_buffer forces a return value of 0 to let
500 * login work (don't know why it does); some functions
501 * that were returning EFAULT, now executes the code;
502 * more work on deciding when to disable xmit interrupts;
503 *
504 * Revision 1.19 1994/11/01 20:10:14 root
505 * define routine to start transmission interrupts (by enabling
506 * transmit interrupts); directly enable/disable modem interrupts;
507 *
508 * Revision 1.18 1994/11/01 18:40:45 bentson
509 * Don't always enable transmit interrupts in startup; interrupt on
510 * TxMpty instead of TxRdy to help characters get out before shutdown;
511 * restructure xmit interrupt to check for chars first and quit if
512 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
513 * (to my view);
514 *
515 * Revision 1.17 1994/10/30 04:39:45 bentson
516 * rename serial_driver and callout_driver to cy_serial_driver and
517 * cy_callout_driver to avoid linkage interference; initialize
518 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
519 * from cyclades_port structure; add paranoia check to cy_close;
520 *
521 * Revision 1.16 1994/10/30 01:14:33 bentson
522 * change major numbers; add some _early_ return statements;
523 *
524 * Revision 1.15 1994/10/29 06:43:15 bentson
525 * final tidying up for clean compile; enable some error reporting
526 *
527 * Revision 1.14 1994/10/28 20:30:22 Bentson
528 * lots of changes to drag the driver towards the new tty_io
529 * structures and operation. not expected to work, but may
530 * compile cleanly.
531 *
532 * Revision 1.13 1994/07/21 23:08:57 Bentson
533 * add some diagnostic cruft; support 24 lines (for testing
534 * both -8Y and -16Y cards; be more thorough in servicing all
535 * chips during interrupt; add "volatile" a few places to
536 * circumvent compiler optimizations; fix base & offset
537 * computations in block_til_ready (was causing chip 0 to
538 * stop operation)
539 *
540 * Revision 1.12 1994/07/19 16:42:11 Bentson
541 * add some hackery for kernel version 1.1.8; expand
542 * error messages; refine timing for delay loops and
543 * declare loop params volatile
544 *
545 * Revision 1.11 1994/06/11 21:53:10 bentson
546 * get use of save_car right in transmit interrupt service
547 *
548 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
549 * add some diagnostic printing; try to fix save_car stuff
550 *
551 * Revision 1.10 1994/06/11 20:36:08 bentson
552 * clean up compiler warnings
553 *
554 * Revision 1.9 1994/06/11 19:42:46 bentson
555 * added a bunch of code to support modem signalling
556 *
557 * Revision 1.8 1994/06/11 17:57:07 bentson
558 * recognize break & parity error
559 *
560 * Revision 1.7 1994/06/05 05:51:34 bentson
561 * Reorder baud table to be monotonic; add cli to CP; discard
562 * incoming characters and status if the line isn't open; start to
563 * fold code into cy_throttle; start to port get_serial_info,
564 * set_serial_info, get_modem_info, set_modem_info, and send_break
565 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
566 * get flow control characters from tty struct; invalidate ports w/o
567 * hardware;
568 *
569 * Revision 1.6 1994/05/31 18:42:21 bentson
570 * add a loop-breaker in the interrupt service routine;
571 * note when port is initialized so that it can be shut
572 * down under the right conditions; receive works without
573 * any obvious errors
574 *
575 * Revision 1.5 1994/05/30 00:55:02 bentson
576 * transmit works without obvious errors
577 *
578 * Revision 1.4 1994/05/27 18:46:27 bentson
579 * incorporated more code from lib_y.c; can now print short
580 * strings under interrupt control to port zero; seems to
581 * select ports/channels/lines correctly
582 *
583 * Revision 1.3 1994/05/25 22:12:44 bentson
584 * shifting from multi-port on a card to proper multiplexor
585 * data structures; added skeletons of most routines
586 *
587 * Revision 1.2 1994/05/19 13:21:43 bentson
588 * start to crib from other sources
589 *
590 */
591
c8e1693a 592#define CY_VERSION "2.5"
096dcfce 593
1da177e4
LT		 594/* If you need to install more boards than NR_CARDS, change the constant
595 in the definition below. No other change is necessary to support up to
596 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
597
02f1175c 598#define NR_CARDS 4
1da177e4
LT		 599
600/*
601 If the total number of ports is larger than NR_PORTS, change this
602 constant in the definition below. No other change is necessary to
603 support more boards/ports. */
604
02f1175c 605#define NR_PORTS 256
1da177e4
LT		 606
607#define ZE_V1_NPORTS 64
608#define ZO_V1 0
609#define ZO_V2 1
610#define ZE_V1 2
611
612#define SERIAL_PARANOIA_CHECK
613#undef CY_DEBUG_OPEN
614#undef CY_DEBUG_THROTTLE
615#undef CY_DEBUG_OTHER
616#undef CY_DEBUG_IO
617#undef CY_DEBUG_COUNT
618#undef CY_DEBUG_DTR
619#undef CY_DEBUG_WAIT_UNTIL_SENT
620#undef CY_DEBUG_INTERRUPTS
621#undef CY_16Y_HACK
622#undef CY_ENABLE_MONITORING
623#undef CY_PCI_DEBUG
624
1da177e4 625/*
15ed6cc0 626 * Include section
1da177e4 627 */
1da177e4
LT		 628#include <linux/module.h>
629#include <linux/errno.h>
630#include <linux/signal.h>
631#include <linux/sched.h>
632#include <linux/timer.h>
633#include <linux/interrupt.h>
634#include <linux/tty.h>
33f0f88f 635#include <linux/tty_flip.h>
1da177e4
LT		 636#include <linux/serial.h>
637#include <linux/major.h>
638#include <linux/string.h>
639#include <linux/fcntl.h>
640#include <linux/ptrace.h>
641#include <linux/cyclades.h>
642#include <linux/mm.h>
643#include <linux/ioport.h>
644#include <linux/init.h>
645#include <linux/delay.h>
646#include <linux/spinlock.h>
647#include <linux/bitops.h>
054f5b0a 648#include <linux/firmware.h>
1da177e4
LT		 649
650#include <asm/system.h>
15ed6cc0 651#include <linux/io.h>
1da177e4 652#include <asm/irq.h>
15ed6cc0 653#include <linux/uaccess.h>
1da177e4 654
1da177e4
LT		 655#include <linux/kernel.h>
656#include <linux/pci.h>
657
658#include <linux/stat.h>
659#include <linux/proc_fs.h>
660
02f1175c
JS		 661static void cy_throttle(struct tty_struct *tty);
662static void cy_send_xchar(struct tty_struct *tty, char ch);
1da177e4 663
65f76a82 664#define IS_CYC_Z(card) ((card).num_chips == (unsigned int)-1)
1da177e4
LT		 665
666#define Z_FPGA_CHECK(card) \
db05c3b1 667 ((readl(&((struct RUNTIME_9060 __iomem *) \
02f1175c 668 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
1da177e4 669
15ed6cc0 670#define ISZLOADED(card) (((ZO_V1 == readl(&((struct RUNTIME_9060 __iomem *) \
1da177e4
LT		 671 ((card).ctl_addr))->mail_box_0)) || \
672 Z_FPGA_CHECK(card)) && \
15ed6cc0 673 (ZFIRM_ID == readl(&((struct FIRM_ID __iomem *) \
1da177e4
LT		 674 ((card).base_addr+ID_ADDRESS))->signature)))
675
676#ifndef SERIAL_XMIT_SIZE
677#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
678#endif
679#define WAKEUP_CHARS 256
680
681#define STD_COM_FLAGS (0)
682
054f5b0a
JS		 683/* firmware stuff */
684#define ZL_MAX_BLOCKS 16
685#define DRIVER_VERSION 0x02010203
686#define RAM_SIZE 0x80000
687
688#define Z_FPGA_LOADED(X) ((readl(&(X)->init_ctrl) & (1<<17)) != 0)
689
690enum zblock_type {
691 ZBLOCK_PRG = 0,
692 ZBLOCK_FPGA = 1
693};
694
695struct zfile_header {
696 char name[64];
697 char date[32];
698 char aux[32];
699 u32 n_config;
700 u32 config_offset;
701 u32 n_blocks;
702 u32 block_offset;
703 u32 reserved[9];
704} __attribute__ ((packed));
705
706struct zfile_config {
707 char name[64];
708 u32 mailbox;
709 u32 function;
710 u32 n_blocks;
711 u32 block_list[ZL_MAX_BLOCKS];
712} __attribute__ ((packed));
713
714struct zfile_block {
715 u32 type;
716 u32 file_offset;
717 u32 ram_offset;
718 u32 size;
719} __attribute__ ((packed));
720
1da177e4
LT		 721static struct tty_driver *cy_serial_driver;
722
723#ifdef CONFIG_ISA
724/* This is the address lookup table. The driver will probe for
725 Cyclom-Y/ISA boards at all addresses in here. If you want the
726 driver to probe addresses at a different address, add it to
727 this table. If the driver is probing some other board and
728 causing problems, remove the offending address from this table.
1da177e4
LT		 729*/
730
731static unsigned int cy_isa_addresses[] = {
02f1175c
JS		 732 0xD0000,
733 0xD2000,
734 0xD4000,
735 0xD6000,
736 0xD8000,
737 0xDA000,
738 0xDC000,
739 0xDE000,
740 0, 0, 0, 0, 0, 0, 0, 0
1da177e4 741};
02f1175c 742
fe971071 743#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
1da177e4
LT		 744
745#ifdef MODULE
3046d50e
JS		 746static long maddr[NR_CARDS];
747static int irq[NR_CARDS];
1da177e4
LT		 748
749module_param_array(maddr, long, NULL, 0);
750module_param_array(irq, int, NULL, 0);
751#endif
752
02f1175c 753#endif /* CONFIG_ISA */
1da177e4
LT		 754
755/* This is the per-card data structure containing address, irq, number of
756 channels, etc. This driver supports a maximum of NR_CARDS cards.
757*/
758static struct cyclades_card cy_card[NR_CARDS];
759
02f1175c 760static int cy_next_channel; /* next minor available */
1da177e4 761
1da177e4
LT		 762/*
763 * This is used to look up the divisor speeds and the timeouts
764 * We're normally limited to 15 distinct baud rates. The extra
765 * are accessed via settings in info->flags.
766 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
767 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
768 * HI VHI
769 * 20
770 */
771static int baud_table[] = {
02f1175c
JS		 772 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
773 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
774 230400, 0
775};
776
777static char baud_co_25[] = { /* 25 MHz clock option table */
778 /* value => 00 01 02 03 04 */
779 /* divide by 8 32 128 512 2048 */
780 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
781 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
782};
783
784static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
785 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
786 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
787};
788
789static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
790 /* value => 00 01 02 03 04 */
791 /* divide by 8 32 128 512 2048 */
792 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
793 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
794 0x00
795};
796
797static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
798 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
799 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
800 0x21
801};
802
803static char baud_cor3[] = { /* receive threshold */
804 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
805 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
806 0x07
807};
1da177e4
LT		 808
809/*
810 * The Cyclades driver implements HW flow control as any serial driver.
15ed6cc0
AC		 811 * The cyclades_port structure member rflow and the vector rflow_thr
812 * allows us to take advantage of a special feature in the CD1400 to avoid
813 * data loss even when the system interrupt latency is too high. These flags
814 * are to be used only with very special applications. Setting these flags
815 * requires the use of a special cable (DTR and RTS reversed). In the new
816 * CD1400-based boards (rev. 6.00 or later), there is no need for special
1da177e4
LT		 817 * cables.
818 */
819
02f1175c
JS		 820static char rflow_thr[] = { /* rflow threshold */
821 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
822 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
823 0x0a
824};
1da177e4
LT		 825
826/* The Cyclom-Ye has placed the sequential chips in non-sequential
827 * address order. This look-up table overcomes that problem.
828 */
02f1175c
JS		 829static int cy_chip_offset[] = { 0x0000,
830 0x0400,
831 0x0800,
832 0x0C00,
833 0x0200,
834 0x0600,
835 0x0A00,
836 0x0E00
837};
1da177e4
LT		 838
839/* PCI related definitions */
840
1da177e4 841#ifdef CONFIG_PCI
893de2df 842static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
15ed6cc0
AC		 843 /* PCI < 1Mb */
844 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
845 /* PCI > 1Mb */
846 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
847 /* 4Y PCI < 1Mb */
848 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
849 /* 4Y PCI > 1Mb */
850 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
851 /* 8Y PCI < 1Mb */
852 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
853 /* 8Y PCI > 1Mb */
854 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
855 /* Z PCI < 1Mb */
856 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
857 /* Z PCI > 1Mb */
858 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
893de2df 859 { } /* end of table */
02f1175c 860};
893de2df 861MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
1da177e4
LT		 862#endif
863
864static void cy_start(struct tty_struct *);
865static void set_line_char(struct cyclades_port *);
1a86b5e3 866static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
1da177e4
LT		 867#ifdef CONFIG_ISA
868static unsigned detect_isa_irq(void __iomem *);
02f1175c 869#endif /* CONFIG_ISA */
1da177e4 870
02f1175c 871static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
1da177e4
LT		 872
873#ifndef CONFIG_CYZ_INTR
874static void cyz_poll(unsigned long);
875
876/* The Cyclades-Z polling cycle is defined by this variable */
877static long cyz_polling_cycle = CZ_DEF_POLL;
878
8d06afab 879static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
1da177e4 880
02f1175c 881#else /* CONFIG_CYZ_INTR */
1da177e4
LT		 882static void cyz_rx_restart(unsigned long);
883static struct timer_list cyz_rx_full_timer[NR_PORTS];
02f1175c 884#endif /* CONFIG_CYZ_INTR */
1da177e4 885
02f1175c
JS		 886static inline int serial_paranoia_check(struct cyclades_port *info,
887 char *name, const char *routine)
1da177e4
LT		 888{
889#ifdef SERIAL_PARANOIA_CHECK
02f1175c 890 if (!info) {
21719191
JS		 891 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
892 "in %s\n", name, routine);
02f1175c
JS		 893 return 1;
894 }
895
02f1175c 896 if (info->magic != CYCLADES_MAGIC) {
21719191
JS		 897 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
898 "struct (%s) in %s\n", name, routine);
02f1175c
JS		 899 return 1;
900 }
1da177e4 901#endif
02f1175c
JS		 902 return 0;
903} /* serial_paranoia_check */
1da177e4 904
1da177e4
LT		 905/***********************************************************/
906/********* Start of block of Cyclom-Y specific code ********/
907
908/* This routine waits up to 1000 micro-seconds for the previous
909 command to the Cirrus chip to complete and then issues the
910 new command. An error is returned if the previous command
911 didn't finish within the time limit.
912
913 This function is only called from inside spinlock-protected code.
914 */
15ed6cc0 915static int cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index)
1da177e4 916{
ad39c300 917 unsigned int i;
1da177e4 918
02f1175c
JS		 919 /* Check to see that the previous command has completed */
920 for (i = 0; i < 100; i++) {
15ed6cc0 921 if (readb(base_addr + (CyCCR << index)) == 0)
02f1175c 922 break;
02f1175c 923 udelay(10L);
1da177e4 924 }
02f1175c
JS		 925 /* if the CCR never cleared, the previous command
926 didn't finish within the "reasonable time" */
927 if (i == 100)
096dcfce 928 return -1;
1da177e4 929
02f1175c
JS		 930 /* Issue the new command */
931 cy_writeb(base_addr + (CyCCR << index), cmd);
1da177e4 932
096dcfce 933 return 0;
02f1175c 934} /* cyy_issue_cmd */
1da177e4
LT		 935
936#ifdef CONFIG_ISA
937/* ISA interrupt detection code */
15ed6cc0 938static unsigned detect_isa_irq(void __iomem *address)
1da177e4 939{
02f1175c
JS		 940 int irq;
941 unsigned long irqs, flags;
942 int save_xir, save_car;
943 int index = 0; /* IRQ probing is only for ISA */
944
945 /* forget possible initially masked and pending IRQ */
946 irq = probe_irq_off(probe_irq_on());
947
948 /* Clear interrupts on the board first */
949 cy_writeb(address + (Cy_ClrIntr << index), 0);
950 /* Cy_ClrIntr is 0x1800 */
951
952 irqs = probe_irq_on();
953 /* Wait ... */
954 udelay(5000L);
955
956 /* Enable the Tx interrupts on the CD1400 */
957 local_irq_save(flags);
958 cy_writeb(address + (CyCAR << index), 0);
959 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
960
961 cy_writeb(address + (CyCAR << index), 0);
962 cy_writeb(address + (CySRER << index),
db05c3b1 963 readb(address + (CySRER << index)) | CyTxRdy);
02f1175c
JS		 964 local_irq_restore(flags);
965
966 /* Wait ... */
967 udelay(5000L);
968
969 /* Check which interrupt is in use */
970 irq = probe_irq_off(irqs);
971
972 /* Clean up */
db05c3b1
JS		 973 save_xir = (u_char) readb(address + (CyTIR << index));
974 save_car = readb(address + (CyCAR << index));
02f1175c
JS		 975 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
976 cy_writeb(address + (CySRER << index),
db05c3b1 977 readb(address + (CySRER << index)) & ~CyTxRdy);
02f1175c
JS		 978 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
979 cy_writeb(address + (CyCAR << index), (save_car));
980 cy_writeb(address + (Cy_ClrIntr << index), 0);
981 /* Cy_ClrIntr is 0x1800 */
982
983 return (irq > 0) ? irq : 0;
1da177e4 984}
02f1175c 985#endif /* CONFIG_ISA */
1da177e4 986
ce97a097
JS		 987static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
988 void __iomem *base_addr)
e941027f
JS		 989{
990 struct cyclades_port *info;
991 struct tty_struct *tty;
65f76a82
JS		 992 int len, index = cinfo->bus_index;
993 u8 save_xir, channel, save_car, data, char_count;
e941027f 994
e941027f 995#ifdef CY_DEBUG_INTERRUPTS
ce97a097 996 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
e941027f 997#endif
ce97a097 998 /* determine the channel & change to that context */
65f76a82
JS		 999 save_xir = readb(base_addr + (CyRIR << index));
1000 channel = save_xir & CyIRChannel;
ce97a097
JS		 1001 info = &cinfo->ports[channel + chip * 4];
1002 save_car = readb(base_addr + (CyCAR << index));
1003 cy_writeb(base_addr + (CyCAR << index), save_xir);
1004
1005 /* if there is nowhere to put the data, discard it */
1006 if (info->tty == NULL) {
65f76a82
JS		 1007 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1008 CyIVRRxEx) { /* exception */
ce97a097
JS		 1009 data = readb(base_addr + (CyRDSR << index));
1010 } else { /* normal character reception */
1011 char_count = readb(base_addr + (CyRDCR << index));
1012 while (char_count--)
db05c3b1 1013 data = readb(base_addr + (CyRDSR << index));
ce97a097
JS		 1014 }
1015 goto end;
1016 }
1017 /* there is an open port for this data */
1018 tty = info->tty;
65f76a82
JS		 1019 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1020 CyIVRRxEx) { /* exception */
ce97a097
JS		 1021 data = readb(base_addr + (CyRDSR << index));
1022
1023 /* For statistics only */
1024 if (data & CyBREAK)
1025 info->icount.brk++;
1026 else if (data & CyFRAME)
1027 info->icount.frame++;
1028 else if (data & CyPARITY)
1029 info->icount.parity++;
1030 else if (data & CyOVERRUN)
1031 info->icount.overrun++;
1032
1033 if (data & info->ignore_status_mask) {
1034 info->icount.rx++;
ce97a097
JS		 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) {
15ed6cc0 1047 tty_insert_flip_char(tty,
ce97a097
JS		 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);
ce97a097 1119}
e941027f 1120
65f76a82 1121static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
ce97a097
JS		 1122 void __iomem *base_addr)
1123{
1124 struct cyclades_port *info;
65f76a82
JS		 1125 int char_count, index = cinfo->bus_index;
1126 u8 save_xir, channel, save_car, outch;
ce97a097
JS		 1127
1128 /* Since we only get here when the transmit buffer
1129 is empty, we know we can always stuff a dozen
1130 characters. */
e941027f 1131#ifdef CY_DEBUG_INTERRUPTS
ce97a097 1132 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
e941027f
JS		 1133#endif
1134
ce97a097 1135 /* determine the channel & change to that context */
65f76a82
JS		 1136 save_xir = readb(base_addr + (CyTIR << index));
1137 channel = save_xir & CyIRChannel;
ce97a097
JS		 1138 save_car = readb(base_addr + (CyCAR << index));
1139 cy_writeb(base_addr + (CyCAR << index), save_xir);
1140
1141 /* validate the port# (as configured and open) */
1142 if (channel + chip * 4 >= cinfo->nports) {
1143 cy_writeb(base_addr + (CySRER << index),
1144 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1145 goto end;
1146 }
1147 info = &cinfo->ports[channel + chip * 4];
1148 if (info->tty == NULL) {
1149 cy_writeb(base_addr + (CySRER << index),
1150 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1151 goto end;
1152 }
02f1175c 1153
ce97a097
JS		 1154 /* load the on-chip space for outbound data */
1155 char_count = info->xmit_fifo_size;
02f1175c 1156
ce97a097
JS		 1157 if (info->x_char) { /* send special char */
1158 outch = info->x_char;
1159 cy_writeb(base_addr + (CyTDR << index), outch);
1160 char_count--;
1161 info->icount.tx++;
1162 info->x_char = 0;
1163 }
02f1175c 1164
ce97a097
JS		 1165 if (info->breakon || info->breakoff) {
1166 if (info->breakon) {
1167 cy_writeb(base_addr + (CyTDR << index), 0);
1168 cy_writeb(base_addr + (CyTDR << index), 0x81);
1169 info->breakon = 0;
1170 char_count -= 2;
e941027f 1171 }
ce97a097
JS		 1172 if (info->breakoff) {
1173 cy_writeb(base_addr + (CyTDR << index), 0);
1174 cy_writeb(base_addr + (CyTDR << index), 0x83);
1175 info->breakoff = 0;
1176 char_count -= 2;
e941027f 1177 }
ce97a097 1178 }
02f1175c 1179
ce97a097
JS		 1180 while (char_count-- > 0) {
1181 if (!info->xmit_cnt) {
1182 if (readb(base_addr + (CySRER << index)) & CyTxMpty) {
1183 cy_writeb(base_addr + (CySRER << index),
1184 readb(base_addr + (CySRER << index)) &
02f1175c 1185 ~CyTxMpty);
ce97a097
JS		 1186 } else {
1187 cy_writeb(base_addr + (CySRER << index),
1188 (readb(base_addr + (CySRER << index)) &
02f1175c 1189 ~CyTxRdy) | CyTxMpty);
02f1175c 1190 }
ce97a097
JS		 1191 goto done;
1192 }
1193 if (info->xmit_buf == NULL) {
1194 cy_writeb(base_addr + (CySRER << index),
1195 readb(base_addr + (CySRER << index)) &
02f1175c 1196 ~CyTxRdy);
ce97a097
JS		 1197 goto done;
1198 }
1199 if (info->tty->stopped || info->tty->hw_stopped) {
1200 cy_writeb(base_addr + (CySRER << index),
1201 readb(base_addr + (CySRER << index)) &
02f1175c 1202 ~CyTxRdy);
ce97a097
JS		 1203 goto done;
1204 }
1205 /* Because the Embedded Transmit Commands have been enabled,
1206 * we must check to see if the escape character, NULL, is being
1207 * sent. If it is, we must ensure that there is room for it to
1208 * be doubled in the output stream. Therefore we no longer
1209 * advance the pointer when the character is fetched, but
1210 * rather wait until after the check for a NULL output
1211 * character. This is necessary because there may not be room
1212 * for the two chars needed to send a NULL.)
1213 */
1214 outch = info->xmit_buf[info->xmit_tail];
1215 if (outch) {
1216 info->xmit_cnt--;
1217 info->xmit_tail = (info->xmit_tail + 1) &
1218 (SERIAL_XMIT_SIZE - 1);
1219 cy_writeb(base_addr + (CyTDR << index), outch);
1220 info->icount.tx++;
1221 } else {
1222 if (char_count > 1) {
02f1175c
JS		 1223 info->xmit_cnt--;
1224 info->xmit_tail = (info->xmit_tail + 1) &
ce97a097 1225 (SERIAL_XMIT_SIZE - 1);
02f1175c 1226 cy_writeb(base_addr + (CyTDR << index), outch);
ce97a097 1227 cy_writeb(base_addr + (CyTDR << index), 0);
02f1175c 1228 info->icount.tx++;
ce97a097 1229 char_count--;
02f1175c 1230 }
e941027f 1231 }
e941027f
JS		 1232 }
1233
ce97a097
JS		 1234done:
1235 tty_wakeup(info->tty);
1236end:
1237 /* end of service */
1238 cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f);
1239 cy_writeb(base_addr + (CyCAR << index), save_car);
ce97a097 1240}
02f1175c 1241
ce97a097
JS		 1242static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
1243 void __iomem *base_addr)
1244{
1245 struct cyclades_port *info;
65f76a82
JS		 1246 int index = cinfo->bus_index;
1247 u8 save_xir, channel, save_car, mdm_change, mdm_status;
ce97a097
JS		 1248
1249 /* determine the channel & change to that context */
65f76a82
JS		 1250 save_xir = readb(base_addr + (CyMIR << index));
1251 channel = save_xir & CyIRChannel;
ce97a097
JS		 1252 info = &cinfo->ports[channel + chip * 4];
1253 save_car = readb(base_addr + (CyCAR << index));
1254 cy_writeb(base_addr + (CyCAR << index), save_xir);
1255
1256 mdm_change = readb(base_addr + (CyMISR << index));
1257 mdm_status = readb(base_addr + (CyMSVR1 << index));
1258
1259 if (!info->tty)
1260 goto end;
1261
1262 if (mdm_change & CyANY_DELTA) {
1263 /* For statistics only */
1264 if (mdm_change & CyDCD)
1265 info->icount.dcd++;
1266 if (mdm_change & CyCTS)
1267 info->icount.cts++;
1268 if (mdm_change & CyDSR)
1269 info->icount.dsr++;
1270 if (mdm_change & CyRI)
1271 info->icount.rng++;
1272
1273 wake_up_interruptible(&info->delta_msr_wait);
1274 }
1275
1276 if ((mdm_change & CyDCD) && (info->flags & ASYNC_CHECK_CD)) {
1277 if (!(mdm_status & CyDCD)) {
1278 tty_hangup(info->tty);
1279 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1280 }
1281 wake_up_interruptible(&info->open_wait);
1282 }
1283 if ((mdm_change & CyCTS) && (info->flags & ASYNC_CTS_FLOW)) {
1284 if (info->tty->hw_stopped) {
1285 if (mdm_status & CyCTS) {
1286 /* cy_start isn't used
1287 because... !!! */
1288 info->tty->hw_stopped = 0;
1289 cy_writeb(base_addr + (CySRER << index),
1290 readb(base_addr + (CySRER << index)) |
1291 CyTxRdy);
1292 tty_wakeup(info->tty);
02f1175c 1293 }
ce97a097
JS		 1294 } else {
1295 if (!(mdm_status & CyCTS)) {
1296 /* cy_stop isn't used
1297 because ... !!! */
1298 info->tty->hw_stopped = 1;
1299 cy_writeb(base_addr + (CySRER << index),
1300 readb(base_addr + (CySRER << index)) &
1301 ~CyTxRdy);
02f1175c 1302 }
e941027f 1303 }
e941027f 1304 }
ce97a097
JS		 1305/* if (mdm_change & CyDSR) {
1306 }
1307 if (mdm_change & CyRI) {
1308 }*/
1309end:
1310 /* end of service */
1311 cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f);
1312 cy_writeb(base_addr + (CyCAR << index), save_car);
e941027f
JS		 1313}
1314
1da177e4
LT		 1315/* The real interrupt service routine is called
1316 whenever the card wants its hand held--chars
1317 received, out buffer empty, modem change, etc.
1318 */
02f1175c 1319static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1da177e4 1320{
02f1175c 1321 int status;
f7429034 1322 struct cyclades_card *cinfo = dev_id;
02f1175c 1323 void __iomem *base_addr, *card_base_addr;
65f76a82 1324 unsigned int chip, too_many, had_work;
02f1175c 1325 int index;
02f1175c 1326
f7429034 1327 if (unlikely(cinfo == NULL)) {
1da177e4 1328#ifdef CY_DEBUG_INTERRUPTS
15ed6cc0
AC		 1329 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
1330 irq);
1da177e4 1331#endif
02f1175c
JS		 1332 return IRQ_NONE; /* spurious interrupt */
1333 }
1334
1335 card_base_addr = cinfo->base_addr;
1336 index = cinfo->bus_index;
1337
f1e83c6c
JS		 1338 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1339 if (unlikely(card_base_addr == NULL))
1340 return IRQ_HANDLED;
1341
02f1175c
JS		 1342 /* This loop checks all chips in the card. Make a note whenever
1343 _any_ chip had some work to do, as this is considered an
1344 indication that there will be more to do. Only when no chip
1345 has any work does this outermost loop exit.
1346 */
1347 do {
1348 had_work = 0;
1349 for (chip = 0; chip < cinfo->num_chips; chip++) {
1350 base_addr = cinfo->base_addr +
1351 (cy_chip_offset[chip] << index);
1352 too_many = 0;
db05c3b1 1353 while ((status = readb(base_addr +
02f1175c
JS		 1354 (CySVRR << index))) != 0x00) {
1355 had_work++;
1356 /* The purpose of the following test is to ensure that
1357 no chip can monopolize the driver. This forces the
1358 chips to be checked in a round-robin fashion (after
1359 draining each of a bunch (1000) of characters).
1360 */
ce97a097 1361 if (1000 < too_many++)
02f1175c 1362 break;
1c0a387c 1363 spin_lock(&cinfo->card_lock);
ce97a097
JS		 1364 if (status & CySRReceive) /* rx intr */
1365 cyy_chip_rx(cinfo, chip, base_addr);
1366 if (status & CySRTransmit) /* tx intr */
1367 cyy_chip_tx(cinfo, chip, base_addr);
1368 if (status & CySRModem) /* modem intr */
1369 cyy_chip_modem(cinfo, chip, base_addr);
1c0a387c 1370 spin_unlock(&cinfo->card_lock);
02f1175c
JS		 1371 }
1372 }
1373 } while (had_work);
1374
1375 /* clear interrupts */
1376 spin_lock(&cinfo->card_lock);
1377 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1378 /* Cy_ClrIntr is 0x1800 */
1379 spin_unlock(&cinfo->card_lock);
1380 return IRQ_HANDLED;
1381} /* cyy_interrupt */
1da177e4
LT		 1382
1383/***********************************************************/
1384/********* End of block of Cyclom-Y specific code **********/
15ed6cc0 1385/******** Start of block of Cyclades-Z specific code *******/
1da177e4
LT		 1386/***********************************************************/
1387
1388static int
02f1175c 1389cyz_fetch_msg(struct cyclades_card *cinfo,
15ed6cc0 1390 __u32 *channel, __u8 *cmd, __u32 *param)
1da177e4 1391{
02f1175c
JS		 1392 struct FIRM_ID __iomem *firm_id;
1393 struct ZFW_CTRL __iomem *zfw_ctrl;
1394 struct BOARD_CTRL __iomem *board_ctrl;
1395 unsigned long loc_doorbell;
1396
1397 firm_id = cinfo->base_addr + ID_ADDRESS;
15ed6cc0 1398 if (!ISZLOADED(*cinfo))
096dcfce 1399 return -1;
db05c3b1 1400 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 1401 board_ctrl = &zfw_ctrl->board_ctrl;
1402
db05c3b1 1403 loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
02f1175c
JS		 1404 (cinfo->ctl_addr))->loc_doorbell);
1405 if (loc_doorbell) {
1406 *cmd = (char)(0xff & loc_doorbell);
db05c3b1
JS		 1407 *channel = readl(&board_ctrl->fwcmd_channel);
1408 *param = (__u32) readl(&board_ctrl->fwcmd_param);
02f1175c
JS		 1409 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1410 loc_doorbell, 0xffffffff);
1411 return 1;
1412 }
1413 return 0;
1414} /* cyz_fetch_msg */
1da177e4
LT		 1415
1416static int
02f1175c 1417cyz_issue_cmd(struct cyclades_card *cinfo,
1a86b5e3 1418 __u32 channel, __u8 cmd, __u32 param)
1da177e4 1419{
02f1175c
JS		 1420 struct FIRM_ID __iomem *firm_id;
1421 struct ZFW_CTRL __iomem *zfw_ctrl;
1422 struct BOARD_CTRL __iomem *board_ctrl;
1a86b5e3 1423 __u32 __iomem *pci_doorbell;
65f76a82 1424 unsigned int index;
02f1175c
JS		 1425
1426 firm_id = cinfo->base_addr + ID_ADDRESS;
15ed6cc0 1427 if (!ISZLOADED(*cinfo))
096dcfce 1428 return -1;
15ed6cc0 1429
db05c3b1 1430 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 1431 board_ctrl = &zfw_ctrl->board_ctrl;
1432
1433 index = 0;
1434 pci_doorbell =
1435 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
db05c3b1 1436 while ((readl(pci_doorbell) & 0xff) != 0) {
15ed6cc0 1437 if (index++ == 1000)
db05c3b1 1438 return (int)(readl(pci_doorbell) & 0xff);
02f1175c
JS		 1439 udelay(50L);
1440 }
1441 cy_writel(&board_ctrl->hcmd_channel, channel);
1442 cy_writel(&board_ctrl->hcmd_param, param);
1443 cy_writel(pci_doorbell, (long)cmd);
1444
096dcfce 1445 return 0;
02f1175c 1446} /* cyz_issue_cmd */
1da177e4 1447
65f76a82 1448static void cyz_handle_rx(struct cyclades_port *info,
ad39c300 1449 struct BUF_CTRL __iomem *buf_ctrl)
1da177e4 1450{
875b206b 1451 struct cyclades_card *cinfo = info->card;
02f1175c 1452 struct tty_struct *tty = info->tty;
65f76a82 1453 unsigned int char_count;
02f1175c 1454 int len;
1da177e4 1455#ifdef BLOCKMOVE
ce71b0ff 1456 unsigned char *buf;
1da177e4 1457#else
02f1175c 1458 char data;
1da177e4 1459#endif
ad39c300 1460 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1da177e4 1461
db05c3b1
JS		 1462 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1463 rx_put = readl(&buf_ctrl->rx_put);
1464 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1465 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
02f1175c
JS		 1466 if (rx_put >= rx_get)
1467 char_count = rx_put - rx_get;
1468 else
1469 char_count = rx_put - rx_get + rx_bufsize;
1da177e4 1470
02f1175c 1471 if (char_count) {
1da177e4 1472#ifdef CY_ENABLE_MONITORING
02f1175c
JS		 1473 info->mon.int_count++;
1474 info->mon.char_count += char_count;
1475 if (char_count > info->mon.char_max)
1476 info->mon.char_max = char_count;
1477 info->mon.char_last = char_count;
1da177e4 1478#endif
f7429034 1479 if (tty == NULL) {
02f1175c
JS		 1480 /* flush received characters */
1481 new_rx_get = (new_rx_get + char_count) &
1482 (rx_bufsize - 1);
1483 info->rflush_count++;
1484 } else {
1da177e4 1485#ifdef BLOCKMOVE
02f1175c
JS		 1486 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1487 for performance, but because of buffer boundaries, there
1488 may be several steps to the operation */
ce71b0ff
JS		 1489 while (1) {
1490 len = tty_prepare_flip_string(tty, &buf,
1491 char_count);
1492 if (!len)
1493 break;
1494
1495 len = min_t(unsigned int, min(len, char_count),
1496 rx_bufsize - new_rx_get);
1497
1498 memcpy_fromio(buf, cinfo->base_addr +
1499 rx_bufaddr + new_rx_get, len);
1500
1501 new_rx_get = (new_rx_get + len) &
02f1175c 1502 (rx_bufsize - 1);
ce71b0ff
JS		 1503 char_count -= len;
1504 info->icount.rx += len;
1505 info->idle_stats.recv_bytes += len;
02f1175c 1506 }
1da177e4 1507#else
02f1175c
JS		 1508 len = tty_buffer_request_room(tty, char_count);
1509 while (len--) {
db05c3b1 1510 data = readb(cinfo->base_addr + rx_bufaddr +
02f1175c 1511 new_rx_get);
15ed6cc0
AC		 1512 new_rx_get = (new_rx_get + 1) &
1513 (rx_bufsize - 1);
02f1175c
JS		 1514 tty_insert_flip_char(tty, data, TTY_NORMAL);
1515 info->idle_stats.recv_bytes++;
1516 info->icount.rx++;
1517 }
1da177e4
LT		 1518#endif
1519#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1520 /* Recalculate the number of chars in the RX buffer and issue
1521 a cmd in case it's higher than the RX high water mark */
db05c3b1 1522 rx_put = readl(&buf_ctrl->rx_put);
02f1175c
JS		 1523 if (rx_put >= rx_get)
1524 char_count = rx_put - rx_get;
1525 else
1526 char_count = rx_put - rx_get + rx_bufsize;
65f76a82 1527 if (char_count >= readl(&buf_ctrl->rx_threshold) &&
ebafeeff
JS		 1528 !timer_pending(&cyz_rx_full_timer[
1529 info->line]))
1530 mod_timer(&cyz_rx_full_timer[info->line],
1531 jiffies + 1);
1da177e4 1532#endif
02f1175c
JS		 1533 info->idle_stats.recv_idle = jiffies;
1534 tty_schedule_flip(tty);
1535 }
1536 /* Update rx_get */
1537 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1da177e4 1538 }
1da177e4
LT		 1539}
1540
65f76a82 1541static void cyz_handle_tx(struct cyclades_port *info,
ad39c300 1542 struct BUF_CTRL __iomem *buf_ctrl)
1da177e4 1543{
875b206b 1544 struct cyclades_card *cinfo = info->card;
02f1175c 1545 struct tty_struct *tty = info->tty;
65f76a82
JS		 1546 u8 data;
1547 unsigned int char_count;
1da177e4 1548#ifdef BLOCKMOVE
02f1175c 1549 int small_count;
1da177e4 1550#endif
ad39c300 1551 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1da177e4 1552
02f1175c
JS		 1553 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1554 return;
1da177e4 1555
db05c3b1
JS		 1556 tx_get = readl(&buf_ctrl->tx_get);
1557 tx_put = readl(&buf_ctrl->tx_put);
1558 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1559 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
02f1175c
JS		 1560 if (tx_put >= tx_get)
1561 char_count = tx_get - tx_put - 1 + tx_bufsize;
1562 else
1563 char_count = tx_get - tx_put - 1;
1da177e4 1564
02f1175c 1565 if (char_count) {
1da177e4 1566
f7429034 1567 if (tty == NULL)
02f1175c 1568 goto ztxdone;
1da177e4 1569
02f1175c
JS		 1570 if (info->x_char) { /* send special char */
1571 data = info->x_char;
1da177e4 1572
02f1175c
JS		 1573 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1574 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1575 info->x_char = 0;
1576 char_count--;
1577 info->icount.tx++;
02f1175c 1578 }
1da177e4 1579#ifdef BLOCKMOVE
02f1175c
JS		 1580 while (0 < (small_count = min_t(unsigned int,
1581 tx_bufsize - tx_put, min_t(unsigned int,
1582 (SERIAL_XMIT_SIZE - info->xmit_tail),
1583 min_t(unsigned int, info->xmit_cnt,
1584 char_count))))) {
1585
1586 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1587 tx_put),
1588 &info->xmit_buf[info->xmit_tail],
1589 small_count);
1590
1591 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1592 char_count -= small_count;
1593 info->icount.tx += small_count;
1594 info->xmit_cnt -= small_count;
1595 info->xmit_tail = (info->xmit_tail + small_count) &
1596 (SERIAL_XMIT_SIZE - 1);
02f1175c 1597 }
1da177e4 1598#else
02f1175c
JS		 1599 while (info->xmit_cnt && char_count) {
1600 data = info->xmit_buf[info->xmit_tail];
1601 info->xmit_cnt--;
1602 info->xmit_tail = (info->xmit_tail + 1) &
1603 (SERIAL_XMIT_SIZE - 1);
1604
1605 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1606 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1607 char_count--;
1608 info->icount.tx++;
02f1175c 1609 }
1da177e4 1610#endif
ebafeeff 1611 tty_wakeup(tty);
7fa57a0c 1612ztxdone:
02f1175c
JS		 1613 /* Update tx_put */
1614 cy_writel(&buf_ctrl->tx_put, tx_put);
1da177e4 1615 }
1da177e4
LT		 1616}
1617
02f1175c 1618static void cyz_handle_cmd(struct cyclades_card *cinfo)
1da177e4 1619{
02f1175c
JS		 1620 struct tty_struct *tty;
1621 struct cyclades_port *info;
ad39c300
JS		 1622 static struct FIRM_ID __iomem *firm_id;
1623 static struct ZFW_CTRL __iomem *zfw_ctrl;
1624 static struct BOARD_CTRL __iomem *board_ctrl;
1625 static struct CH_CTRL __iomem *ch_ctrl;
1626 static struct BUF_CTRL __iomem *buf_ctrl;
1a86b5e3
KK		 1627 __u32 channel;
1628 __u8 cmd;
1629 __u32 param;
1630 __u32 hw_ver, fw_ver;
02f1175c
JS		 1631 int special_count;
1632 int delta_count;
1633
1634 firm_id = cinfo->base_addr + ID_ADDRESS;
db05c3b1 1635 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 1636 board_ctrl = &zfw_ctrl->board_ctrl;
db05c3b1
JS		 1637 fw_ver = readl(&board_ctrl->fw_version);
1638 hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
02f1175c
JS		 1639 mail_box_0);
1640
1641 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1642 special_count = 0;
1643 delta_count = 0;
dd025c0c 1644 info = &cinfo->ports[channel];
15ed6cc0
AC		 1645 tty = info->tty;
1646 if (tty == NULL)
02f1175c 1647 continue;
f7429034 1648
02f1175c
JS		 1649 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1650 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1651
1652 switch (cmd) {
1653 case C_CM_PR_ERROR:
1654 tty_insert_flip_char(tty, 0, TTY_PARITY);
1655 info->icount.rx++;
1656 special_count++;
1657 break;
1658 case C_CM_FR_ERROR:
1659 tty_insert_flip_char(tty, 0, TTY_FRAME);
1660 info->icount.rx++;
1661 special_count++;
1662 break;
1663 case C_CM_RXBRK:
1664 tty_insert_flip_char(tty, 0, TTY_BREAK);
1665 info->icount.rx++;
1666 special_count++;
1667 break;
1668 case C_CM_MDCD:
1669 info->icount.dcd++;
1670 delta_count++;
1671 if (info->flags & ASYNC_CHECK_CD) {
1672 if ((fw_ver > 241 ? ((u_long) param) :
db05c3b1 1673 readl(&ch_ctrl->rs_status)) &
02f1175c 1674 C_RS_DCD) {
ebafeeff 1675 wake_up_interruptible(&info->open_wait);
02f1175c 1676 } else {
ebafeeff
JS		 1677 tty_hangup(info->tty);
1678 wake_up_interruptible(&info->open_wait);
1679 info->flags &= ~ASYNC_NORMAL_ACTIVE;
02f1175c
JS		 1680 }
1681 }
1682 break;
1683 case C_CM_MCTS:
1684 info->icount.cts++;
1685 delta_count++;
1686 break;
1687 case C_CM_MRI:
1688 info->icount.rng++;
1689 delta_count++;
1690 break;
1691 case C_CM_MDSR:
1692 info->icount.dsr++;
1693 delta_count++;
1694 break;
1da177e4 1695#ifdef Z_WAKE
02f1175c 1696 case C_CM_IOCTLW:
ebafeeff 1697 complete(&info->shutdown_wait);
02f1175c 1698 break;
1da177e4
LT		 1699#endif
1700#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1701 case C_CM_RXHIWM:
1702 case C_CM_RXNNDT:
1703 case C_CM_INTBACK2:
1704 /* Reception Interrupt */
1da177e4 1705#ifdef CY_DEBUG_INTERRUPTS
21719191
JS		 1706 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1707 "port %ld\n", info->card, channel);
1da177e4 1708#endif
65f76a82 1709 cyz_handle_rx(info, buf_ctrl);
02f1175c
JS		 1710 break;
1711 case C_CM_TXBEMPTY:
1712 case C_CM_TXLOWWM:
1713 case C_CM_INTBACK:
1714 /* Transmission Interrupt */
1da177e4 1715#ifdef CY_DEBUG_INTERRUPTS
21719191
JS		 1716 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1717 "port %ld\n", info->card, channel);
1da177e4 1718#endif
65f76a82 1719 cyz_handle_tx(info, buf_ctrl);
02f1175c
JS		 1720 break;
1721#endif /* CONFIG_CYZ_INTR */
1722 case C_CM_FATAL:
1723 /* should do something with this !!! */
1724 break;
1725 default:
1726 break;
1727 }
1728 if (delta_count)
ebafeeff 1729 wake_up_interruptible(&info->delta_msr_wait);
02f1175c
JS		 1730 if (special_count)
1731 tty_schedule_flip(tty);
1da177e4 1732 }
1da177e4
LT		 1733}
1734
1735#ifdef CONFIG_CYZ_INTR
02f1175c 1736static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1da177e4 1737{
f7429034 1738 struct cyclades_card *cinfo = dev_id;
1da177e4 1739
f7429034 1740 if (unlikely(cinfo == NULL)) {
1da177e4 1741#ifdef CY_DEBUG_INTERRUPTS
15ed6cc0
AC		 1742 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",
1743 irq);
1da177e4 1744#endif
02f1175c
JS		 1745 return IRQ_NONE; /* spurious interrupt */
1746 }
1da177e4 1747
f7429034 1748 if (unlikely(!ISZLOADED(*cinfo))) {
1da177e4 1749#ifdef CY_DEBUG_INTERRUPTS
21719191
JS		 1750 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1751 "(IRQ%d).\n", irq);
1da177e4 1752#endif
02f1175c
JS		 1753 return IRQ_NONE;
1754 }
1da177e4 1755
02f1175c
JS		 1756 /* Handle the interrupts */
1757 cyz_handle_cmd(cinfo);
1da177e4 1758
02f1175c
JS		 1759 return IRQ_HANDLED;
1760} /* cyz_interrupt */
1da177e4 1761
02f1175c 1762static void cyz_rx_restart(unsigned long arg)
1da177e4 1763{
02f1175c 1764 struct cyclades_port *info = (struct cyclades_port *)arg;
875b206b 1765 struct cyclades_card *card = info->card;
02f1175c 1766 int retval;
875b206b 1767 __u32 channel = info->line - card->first_line;
02f1175c
JS		 1768 unsigned long flags;
1769
9fa1b3b1 1770 spin_lock_irqsave(&card->card_lock, flags);
875b206b 1771 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
02f1175c 1772 if (retval != 0) {
21719191 1773 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
02f1175c
JS		 1774 info->line, retval);
1775 }
9fa1b3b1 1776 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4
LT		 1777}
1778
02f1175c 1779#else /* CONFIG_CYZ_INTR */
1da177e4 1780
02f1175c 1781static void cyz_poll(unsigned long arg)
1da177e4 1782{
02f1175c
JS		 1783 struct cyclades_card *cinfo;
1784 struct cyclades_port *info;
1785 struct tty_struct *tty;
c4923b4f
JS		 1786 struct FIRM_ID __iomem *firm_id;
1787 struct ZFW_CTRL __iomem *zfw_ctrl;
1788 struct BOARD_CTRL __iomem *board_ctrl;
c4923b4f 1789 struct BUF_CTRL __iomem *buf_ctrl;
b7050906 1790 unsigned long expires = jiffies + HZ;
65f76a82 1791 unsigned int port, card;
1da177e4 1792
02f1175c
JS		 1793 for (card = 0; card < NR_CARDS; card++) {
1794 cinfo = &cy_card[card];
1795
1796 if (!IS_CYC_Z(*cinfo))
1797 continue;
1798 if (!ISZLOADED(*cinfo))
1799 continue;
1800
1801 firm_id = cinfo->base_addr + ID_ADDRESS;
1802 zfw_ctrl = cinfo->base_addr +
db05c3b1 1803 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 1804 board_ctrl = &(zfw_ctrl->board_ctrl);
1da177e4
LT		 1805
1806 /* Skip first polling cycle to avoid racing conditions with the FW */
02f1175c 1807 if (!cinfo->intr_enabled) {
db05c3b1 1808 cinfo->nports = (int)readl(&board_ctrl->n_channel);
02f1175c
JS		 1809 cinfo->intr_enabled = 1;
1810 continue;
1811 }
1da177e4 1812
02f1175c 1813 cyz_handle_cmd(cinfo);
1da177e4 1814
02f1175c 1815 for (port = 0; port < cinfo->nports; port++) {
dd025c0c 1816 info = &cinfo->ports[port];
02f1175c 1817 tty = info->tty;
02f1175c 1818 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1da177e4 1819
02f1175c 1820 if (!info->throttle)
65f76a82
JS		 1821 cyz_handle_rx(info, buf_ctrl);
1822 cyz_handle_tx(info, buf_ctrl);
02f1175c
JS		 1823 }
1824 /* poll every 'cyz_polling_cycle' period */
b7050906 1825 expires = jiffies + cyz_polling_cycle;
1da177e4 1826 }
b7050906 1827 mod_timer(&cyz_timerlist, expires);
02f1175c 1828} /* cyz_poll */
1da177e4 1829
02f1175c 1830#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 1831
1832/********** End of block of Cyclades-Z specific code *********/
1833/***********************************************************/
1834
1da177e4
LT		 1835/* This is called whenever a port becomes active;
1836 interrupts are enabled and DTR & RTS are turned on.
1837 */
02f1175c 1838static int startup(struct cyclades_port *info)
1da177e4 1839{
875b206b 1840 struct cyclades_card *card;
02f1175c
JS		 1841 unsigned long flags;
1842 int retval = 0;
1843 void __iomem *base_addr;
875b206b 1844 int chip, channel, index;
02f1175c 1845 unsigned long page;
1da177e4 1846
02f1175c 1847 card = info->card;
875b206b 1848 channel = info->line - card->first_line;
1da177e4 1849
02f1175c
JS		 1850 page = get_zeroed_page(GFP_KERNEL);
1851 if (!page)
1852 return -ENOMEM;
1da177e4 1853
9fa1b3b1 1854 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1855
02f1175c
JS		 1856 if (info->flags & ASYNC_INITIALIZED) {
1857 free_page(page);
1858 goto errout;
1859 }
1da177e4 1860
02f1175c 1861 if (!info->type) {
15ed6cc0 1862 if (info->tty)
02f1175c 1863 set_bit(TTY_IO_ERROR, &info->tty->flags);
02f1175c
JS		 1864 free_page(page);
1865 goto errout;
1866 }
1da177e4 1867
02f1175c
JS		 1868 if (info->xmit_buf)
1869 free_page(page);
1870 else
1871 info->xmit_buf = (unsigned char *)page;
1da177e4 1872
9fa1b3b1 1873 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 1874
02f1175c 1875 set_line_char(info);
1da177e4 1876
875b206b 1877 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 1878 chip = channel >> 2;
1879 channel &= 0x03;
875b206b
JS		 1880 index = card->bus_index;
1881 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4
LT		 1882
1883#ifdef CY_DEBUG_OPEN
21719191
JS		 1884 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1885 "base_addr %p\n",
1886 card, chip, channel, base_addr);
1da177e4 1887#endif
9fa1b3b1 1888 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1889
02f1175c 1890 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1da177e4 1891
02f1175c
JS		 1892 cy_writeb(base_addr + (CyRTPR << index),
1893 (info->default_timeout ? info->default_timeout : 0x02));
1894 /* 10ms rx timeout */
1da177e4 1895
02f1175c
JS		 1896 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1897 index);
1da177e4 1898
02f1175c
JS		 1899 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1900 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1901 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1da177e4
LT		 1902
1903#ifdef CY_DEBUG_DTR
21719191
JS		 1904 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1905 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 1906 readb(base_addr + (CyMSVR1 << index)),
1907 readb(base_addr + (CyMSVR2 << index)));
1da177e4
LT		 1908#endif
1909
02f1175c 1910 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1911 readb(base_addr + (CySRER << index)) | CyRxData);
02f1175c 1912 info->flags |= ASYNC_INITIALIZED;
1da177e4 1913
15ed6cc0 1914 if (info->tty)
02f1175c 1915 clear_bit(TTY_IO_ERROR, &info->tty->flags);
02f1175c
JS		 1916 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1917 info->breakon = info->breakoff = 0;
1918 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1919 info->idle_stats.in_use =
1920 info->idle_stats.recv_idle =
1921 info->idle_stats.xmit_idle = jiffies;
1da177e4 1922
9fa1b3b1 1923 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 1924
02f1175c
JS		 1925 } else {
1926 struct FIRM_ID __iomem *firm_id;
1927 struct ZFW_CTRL __iomem *zfw_ctrl;
1928 struct BOARD_CTRL __iomem *board_ctrl;
1929 struct CH_CTRL __iomem *ch_ctrl;
1da177e4 1930
875b206b 1931 base_addr = card->base_addr;
1da177e4 1932
02f1175c 1933 firm_id = base_addr + ID_ADDRESS;
15ed6cc0 1934 if (!ISZLOADED(*card))
02f1175c 1935 return -ENODEV;
1da177e4 1936
875b206b 1937 zfw_ctrl = card->base_addr +
db05c3b1 1938 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 1939 board_ctrl = &zfw_ctrl->board_ctrl;
1940 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4
LT		 1941
1942#ifdef CY_DEBUG_OPEN
21719191
JS		 1943 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1944 "base_addr %p\n", card, channel, base_addr);
1da177e4 1945#endif
9fa1b3b1 1946 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1947
02f1175c 1948 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1da177e4
LT		 1949#ifdef Z_WAKE
1950#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1951 cy_writel(&ch_ctrl[channel].intr_enable,
1952 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1953 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1da177e4 1954#else
02f1175c
JS		 1955 cy_writel(&ch_ctrl[channel].intr_enable,
1956 C_IN_IOCTLW | C_IN_MDCD);
1957#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 1958#else
1959#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1960 cy_writel(&ch_ctrl[channel].intr_enable,
1961 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1962 C_IN_RXNNDT | C_IN_MDCD);
1da177e4 1963#else
02f1175c
JS		 1964 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
1965#endif /* CONFIG_CYZ_INTR */
1966#endif /* Z_WAKE */
1967
875b206b 1968 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
02f1175c 1969 if (retval != 0) {
21719191
JS		 1970 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1971 "%x\n", info->line, retval);
02f1175c 1972 }
1da177e4 1973
02f1175c 1974 /* Flush RX buffers before raising DTR and RTS */
875b206b 1975 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
02f1175c 1976 if (retval != 0) {
21719191
JS		 1977 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1978 "%x\n", info->line, retval);
02f1175c 1979 }
1da177e4 1980
02f1175c
JS		 1981 /* set timeout !!! */
1982 /* set RTS and DTR !!! */
1983 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1 1984 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
02f1175c 1985 C_RS_DTR);
9fa1b3b1 1986 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
02f1175c 1987 if (retval != 0) {
21719191
JS		 1988 printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
1989 "%x\n", info->line, retval);
02f1175c 1990 }
1da177e4 1991#ifdef CY_DEBUG_DTR
21719191 1992 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
1da177e4
LT		 1993#endif
1994
02f1175c
JS		 1995 /* enable send, recv, modem !!! */
1996
1997 info->flags |= ASYNC_INITIALIZED;
15ed6cc0 1998 if (info->tty)
02f1175c 1999 clear_bit(TTY_IO_ERROR, &info->tty->flags);
02f1175c
JS		 2000 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2001 info->breakon = info->breakoff = 0;
2002 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2003 info->idle_stats.in_use =
2004 info->idle_stats.recv_idle =
2005 info->idle_stats.xmit_idle = jiffies;
1da177e4 2006
9fa1b3b1 2007 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 2008 }
1da177e4
LT		 2009
2010#ifdef CY_DEBUG_OPEN
21719191 2011 printk(KERN_DEBUG "cyc startup done\n");
1da177e4
LT		 2012#endif
2013 return 0;
2014
2015errout:
9fa1b3b1 2016 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 2017 return retval;
02f1175c 2018} /* startup */
1da177e4 2019
02f1175c 2020static void start_xmit(struct cyclades_port *info)
1da177e4 2021{
875b206b 2022 struct cyclades_card *card;
02f1175c
JS		 2023 unsigned long flags;
2024 void __iomem *base_addr;
875b206b 2025 int chip, channel, index;
1da177e4 2026
02f1175c 2027 card = info->card;
875b206b
JS		 2028 channel = info->line - card->first_line;
2029 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 2030 chip = channel >> 2;
2031 channel &= 0x03;
875b206b
JS		 2032 index = card->bus_index;
2033 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 2034
9fa1b3b1 2035 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2036 cy_writeb(base_addr + (CyCAR << index), channel);
2037 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2038 readb(base_addr + (CySRER << index)) | CyTxRdy);
9fa1b3b1 2039 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2040 } else {
1da177e4 2041#ifdef CONFIG_CYZ_INTR
02f1175c 2042 int retval;
1da177e4 2043
9fa1b3b1 2044 spin_lock_irqsave(&card->card_lock, flags);
875b206b 2045 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
02f1175c 2046 if (retval != 0) {
21719191
JS		 2047 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2048 "%x\n", info->line, retval);
02f1175c 2049 }
9fa1b3b1 2050 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2051#else /* CONFIG_CYZ_INTR */
2052 /* Don't have to do anything at this time */
2053#endif /* CONFIG_CYZ_INTR */
2054 }
2055} /* start_xmit */
1da177e4
LT		 2056
2057/*
2058 * This routine shuts down a serial port; interrupts are disabled,
2059 * and DTR is dropped if the hangup on close termio flag is on.
2060 */
02f1175c 2061static void shutdown(struct cyclades_port *info)
1da177e4 2062{
875b206b 2063 struct cyclades_card *card;
02f1175c
JS		 2064 unsigned long flags;
2065 void __iomem *base_addr;
875b206b 2066 int chip, channel, index;
02f1175c 2067
15ed6cc0 2068 if (!(info->flags & ASYNC_INITIALIZED))
02f1175c 2069 return;
02f1175c
JS		 2070
2071 card = info->card;
875b206b
JS		 2072 channel = info->line - card->first_line;
2073 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 2074 chip = channel >> 2;
2075 channel &= 0x03;
875b206b
JS		 2076 index = card->bus_index;
2077 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4
LT		 2078
2079#ifdef CY_DEBUG_OPEN
21719191
JS		 2080 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2081 "channel %d, base_addr %p\n",
2082 card, chip, channel, base_addr);
1da177e4
LT		 2083#endif
2084
9fa1b3b1 2085 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2086
2087 /* Clear delta_msr_wait queue to avoid mem leaks. */
2088 wake_up_interruptible(&info->delta_msr_wait);
1da177e4 2089
02f1175c
JS		 2090 if (info->xmit_buf) {
2091 unsigned char *temp;
2092 temp = info->xmit_buf;
2093 info->xmit_buf = NULL;
2094 free_page((unsigned long)temp);
2095 }
2096 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2097 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2098 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2099 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
1da177e4 2100#ifdef CY_DEBUG_DTR
21719191
JS		 2101 printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2102 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 2103 readb(base_addr + (CyMSVR1 << index)),
2104 readb(base_addr + (CyMSVR2 << index)));
1da177e4 2105#endif
02f1175c
JS		 2106 }
2107 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2108 /* it may be appropriate to clear _XMIT at
2109 some later date (after testing)!!! */
2110
15ed6cc0 2111 if (info->tty)
02f1175c 2112 set_bit(TTY_IO_ERROR, &info->tty->flags);
02f1175c 2113 info->flags &= ~ASYNC_INITIALIZED;
9fa1b3b1 2114 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2115 } else {
2116 struct FIRM_ID __iomem *firm_id;
2117 struct ZFW_CTRL __iomem *zfw_ctrl;
2118 struct BOARD_CTRL __iomem *board_ctrl;
2119 struct CH_CTRL __iomem *ch_ctrl;
2120 int retval;
2121
875b206b 2122 base_addr = card->base_addr;
1da177e4 2123#ifdef CY_DEBUG_OPEN
21719191
JS		 2124 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2125 "base_addr %p\n", card, channel, base_addr);
1da177e4
LT		 2126#endif
2127
02f1175c 2128 firm_id = base_addr + ID_ADDRESS;
15ed6cc0 2129 if (!ISZLOADED(*card))
02f1175c 2130 return;
1da177e4 2131
875b206b 2132 zfw_ctrl = card->base_addr +
db05c3b1 2133 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2134 board_ctrl = &zfw_ctrl->board_ctrl;
2135 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4 2136
9fa1b3b1 2137 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 2138
02f1175c
JS		 2139 if (info->xmit_buf) {
2140 unsigned char *temp;
2141 temp = info->xmit_buf;
2142 info->xmit_buf = NULL;
2143 free_page((unsigned long)temp);
1da177e4 2144 }
02f1175c
JS		 2145
2146 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2147 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1 2148 (__u32)(readl(&ch_ctrl[channel].rs_control) &
02f1175c 2149 ~(C_RS_RTS | C_RS_DTR)));
875b206b 2150 retval = cyz_issue_cmd(info->card, channel,
02f1175c
JS		 2151 C_CM_IOCTLM, 0L);
2152 if (retval != 0) {
21719191
JS		 2153 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2154 "was %x\n", info->line, retval);
02f1175c 2155 }
1da177e4 2156#ifdef CY_DEBUG_DTR
21719191 2157 printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
1da177e4 2158#endif
02f1175c 2159 }
1da177e4 2160
15ed6cc0 2161 if (info->tty)
02f1175c 2162 set_bit(TTY_IO_ERROR, &info->tty->flags);
02f1175c
JS		 2163 info->flags &= ~ASYNC_INITIALIZED;
2164
9fa1b3b1 2165 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2166 }
1da177e4
LT		 2167
2168#ifdef CY_DEBUG_OPEN
21719191 2169 printk(KERN_DEBUG "cyc shutdown done\n");
1da177e4 2170#endif
02f1175c 2171} /* shutdown */
1da177e4
LT		 2172
2173/*
2174 * ------------------------------------------------------------
2175 * cy_open() and friends
2176 * ------------------------------------------------------------
2177 */
2178
2179static int
02f1175c
JS		 2180block_til_ready(struct tty_struct *tty, struct file *filp,
2181 struct cyclades_port *info)
1da177e4 2182{
02f1175c
JS		 2183 DECLARE_WAITQUEUE(wait, current);
2184 struct cyclades_card *cinfo;
2185 unsigned long flags;
2186 int chip, channel, index;
2187 int retval;
2188 void __iomem *base_addr;
2189
875b206b 2190 cinfo = info->card;
02f1175c
JS		 2191 channel = info->line - cinfo->first_line;
2192
2193 /*
2194 * If the device is in the middle of being closed, then block
2195 * until it's done, and then try again.
2196 */
2197 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2c7fea99
JS		 2198 wait_event_interruptible(info->close_wait,
2199 !(info->flags & ASYNC_CLOSING));
096dcfce 2200 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
1da177e4 2201 }
02f1175c
JS		 2202
2203 /*
2204 * If non-blocking mode is set, then make the check up front
2205 * and then exit.
2206 */
15ed6cc0
AC		 2207 if ((filp->f_flags & O_NONBLOCK) ||
2208 (tty->flags & (1 << TTY_IO_ERROR))) {
02f1175c
JS		 2209 info->flags |= ASYNC_NORMAL_ACTIVE;
2210 return 0;
2211 }
2212
2213 /*
2214 * Block waiting for the carrier detect and the line to become
2215 * free (i.e., not in use by the callout). While we are in
2216 * this loop, info->count is dropped by one, so that
2217 * cy_close() knows when to free things. We restore it upon
2218 * exit, either normal or abnormal.
2219 */
2220 retval = 0;
2221 add_wait_queue(&info->open_wait, &wait);
1da177e4 2222#ifdef CY_DEBUG_OPEN
21719191
JS		 2223 printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2224 "count = %d\n", info->line, info->count);
1da177e4 2225#endif
9fa1b3b1 2226 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 2227 if (!tty_hung_up_p(filp))
2228 info->count--;
9fa1b3b1 2229 spin_unlock_irqrestore(&cinfo->card_lock, flags);
1da177e4 2230#ifdef CY_DEBUG_COUNT
21719191
JS		 2231 printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2232 "%d\n", current->pid, info->count);
1da177e4 2233#endif
02f1175c
JS		 2234 info->blocked_open++;
2235
2236 if (!IS_CYC_Z(*cinfo)) {
2237 chip = channel >> 2;
2238 channel &= 0x03;
2239 index = cinfo->bus_index;
2240 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2241
2242 while (1) {
9fa1b3b1 2243 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 2244 if ((tty->termios->c_cflag & CBAUD)) {
2245 cy_writeb(base_addr + (CyCAR << index),
2246 (u_char) channel);
2247 cy_writeb(base_addr + (CyMSVR1 << index),
2248 CyRTS);
2249 cy_writeb(base_addr + (CyMSVR2 << index),
2250 CyDTR);
1da177e4 2251#ifdef CY_DEBUG_DTR
21719191
JS		 2252 printk(KERN_DEBUG "cyc:block_til_ready raising "
2253 "DTR\n");
2254 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 2255 readb(base_addr + (CyMSVR1 << index)),
2256 readb(base_addr + (CyMSVR2 << index)));
1da177e4 2257#endif
02f1175c 2258 }
9fa1b3b1 2259 spin_unlock_irqrestore(&cinfo->card_lock, flags);
1da177e4 2260
02f1175c
JS		 2261 set_current_state(TASK_INTERRUPTIBLE);
2262 if (tty_hung_up_p(filp) ||
2263 !(info->flags & ASYNC_INITIALIZED)) {
2264 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2265 -EAGAIN : -ERESTARTSYS);
2266 break;
2267 }
1da177e4 2268
9fa1b3b1 2269 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 2270 cy_writeb(base_addr + (CyCAR << index),
2271 (u_char) channel);
2272 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
db05c3b1 2273 (readb(base_addr +
02f1175c 2274 (CyMSVR1 << index)) & CyDCD))) {
9fa1b3b1 2275 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c
JS		 2276 break;
2277 }
9fa1b3b1 2278 spin_unlock_irqrestore(&cinfo->card_lock, flags);
1da177e4 2279
02f1175c
JS		 2280 if (signal_pending(current)) {
2281 retval = -ERESTARTSYS;
2282 break;
2283 }
1da177e4 2284#ifdef CY_DEBUG_OPEN
21719191
JS		 2285 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2286 "ttyC%d, count = %d\n",
2287 info->line, info->count);
1da177e4 2288#endif
02f1175c 2289 schedule();
1da177e4 2290 }
02f1175c
JS		 2291 } else {
2292 struct FIRM_ID __iomem *firm_id;
2293 struct ZFW_CTRL __iomem *zfw_ctrl;
2294 struct BOARD_CTRL __iomem *board_ctrl;
2295 struct CH_CTRL __iomem *ch_ctrl;
02f1175c
JS		 2296
2297 base_addr = cinfo->base_addr;
2298 firm_id = base_addr + ID_ADDRESS;
2299 if (!ISZLOADED(*cinfo)) {
cc0a8fbb 2300 __set_current_state(TASK_RUNNING);
02f1175c
JS		 2301 remove_wait_queue(&info->open_wait, &wait);
2302 return -EINVAL;
2303 }
2304
15ed6cc0
AC		 2305 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)
2306 & 0xfffff);
02f1175c
JS		 2307 board_ctrl = &zfw_ctrl->board_ctrl;
2308 ch_ctrl = zfw_ctrl->ch_ctrl;
2309
2310 while (1) {
2311 if ((tty->termios->c_cflag & CBAUD)) {
2312 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 2313 readl(&ch_ctrl[channel].rs_control) |
2314 C_RS_RTS | C_RS_DTR);
9fa1b3b1 2315 retval = cyz_issue_cmd(cinfo,
db05c3b1 2316 channel, C_CM_IOCTLM, 0L);
02f1175c 2317 if (retval != 0) {
21719191
JS		 2318 printk(KERN_ERR "cyc:block_til_ready "
2319 "retval on ttyC%d was %x\n",
02f1175c
JS		 2320 info->line, retval);
2321 }
1da177e4 2322#ifdef CY_DEBUG_DTR
21719191
JS		 2323 printk(KERN_DEBUG "cyc:block_til_ready raising "
2324 "Z DTR\n");
1da177e4 2325#endif
02f1175c 2326 }
1da177e4 2327
02f1175c
JS		 2328 set_current_state(TASK_INTERRUPTIBLE);
2329 if (tty_hung_up_p(filp) ||
2330 !(info->flags & ASYNC_INITIALIZED)) {
2331 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2332 -EAGAIN : -ERESTARTSYS);
2333 break;
2334 }
2335 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
db05c3b1 2336 (readl(&ch_ctrl[channel].rs_status) &
02f1175c
JS		 2337 C_RS_DCD))) {
2338 break;
2339 }
2340 if (signal_pending(current)) {
2341 retval = -ERESTARTSYS;
2342 break;
2343 }
1da177e4 2344#ifdef CY_DEBUG_OPEN
21719191
JS		 2345 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2346 "ttyC%d, count = %d\n",
2347 info->line, info->count);
1da177e4 2348#endif
02f1175c
JS		 2349 schedule();
2350 }
1da177e4 2351 }
cc0a8fbb 2352 __set_current_state(TASK_RUNNING);
02f1175c
JS		 2353 remove_wait_queue(&info->open_wait, &wait);
2354 if (!tty_hung_up_p(filp)) {
2355 info->count++;
1da177e4 2356#ifdef CY_DEBUG_COUNT
21719191
JS		 2357 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2358 "count to %d\n", current->pid, info->count);
1da177e4 2359#endif
02f1175c
JS		 2360 }
2361 info->blocked_open--;
1da177e4 2362#ifdef CY_DEBUG_OPEN
21719191
JS		 2363 printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2364 "count = %d\n", info->line, info->count);
1da177e4 2365#endif
02f1175c
JS		 2366 if (retval)
2367 return retval;
2368 info->flags |= ASYNC_NORMAL_ACTIVE;
2369 return 0;
2370} /* block_til_ready */
1da177e4
LT		 2371
2372/*
2373 * This routine is called whenever a serial port is opened. It
2374 * performs the serial-specific initialization for the tty structure.
2375 */
02f1175c 2376static int cy_open(struct tty_struct *tty, struct file *filp)
1da177e4 2377{
02f1175c 2378 struct cyclades_port *info;
65f76a82
JS		 2379 unsigned int i, line;
2380 int retval;
1da177e4 2381
02f1175c 2382 line = tty->index;
15ed6cc0 2383 if (tty->index < 0 || NR_PORTS <= line)
02f1175c 2384 return -ENODEV;
15ed6cc0 2385
dd025c0c
JS		 2386 for (i = 0; i < NR_CARDS; i++)
2387 if (line < cy_card[i].first_line + cy_card[i].nports &&
2388 line >= cy_card[i].first_line)
2389 break;
2390 if (i >= NR_CARDS)
2391 return -ENODEV;
2392 info = &cy_card[i].ports[line - cy_card[i].first_line];
15ed6cc0 2393 if (info->line < 0)
02f1175c 2394 return -ENODEV;
1da177e4 2395
02f1175c
JS		 2396 /* If the card's firmware hasn't been loaded,
2397 treat it as absent from the system. This
2398 will make the user pay attention.
2399 */
875b206b
JS		 2400 if (IS_CYC_Z(*info->card)) {
2401 struct cyclades_card *cinfo = info->card;
02f1175c
JS		 2402 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2403
2404 if (!ISZLOADED(*cinfo)) {
db05c3b1 2405 if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
02f1175c
JS		 2406 (cinfo->ctl_addr))->mail_box_0)) &&
2407 Z_FPGA_CHECK(*cinfo)) &&
db05c3b1 2408 (ZFIRM_HLT == readl(
02f1175c 2409 &firm_id->signature))) {
21719191
JS		 2410 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2411 "need an external power supply for "
2412 "this number of ports.\nFirmware "
2413 "halted.\n");
02f1175c 2414 } else {
21719191
JS		 2415 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2416 "yet loaded\n");
02f1175c
JS		 2417 }
2418 return -ENODEV;
2419 }
2420#ifdef CONFIG_CYZ_INTR
2421 else {
2422 /* In case this Z board is operating in interrupt mode, its
2423 interrupts should be enabled as soon as the first open
2424 happens to one of its ports. */
2425 if (!cinfo->intr_enabled) {
2426 struct ZFW_CTRL __iomem *zfw_ctrl;
2427 struct BOARD_CTRL __iomem *board_ctrl;
2428
2429 zfw_ctrl = cinfo->base_addr +
db05c3b1
JS		 2430 (readl(&firm_id->zfwctrl_addr) &
2431 0xfffff);
02f1175c
JS		 2432
2433 board_ctrl = &zfw_ctrl->board_ctrl;
2434
2435 /* Enable interrupts on the PLX chip */
2436 cy_writew(cinfo->ctl_addr + 0x68,
db05c3b1 2437 readw(cinfo->ctl_addr + 0x68) | 0x0900);
02f1175c
JS		 2438 /* Enable interrupts on the FW */
2439 retval = cyz_issue_cmd(cinfo, 0,
2440 C_CM_IRQ_ENBL, 0L);
2441 if (retval != 0) {
21719191
JS		 2442 printk(KERN_ERR "cyc:IRQ enable retval "
2443 "was %x\n", retval);
02f1175c
JS		 2444 }
2445 cinfo->nports =
db05c3b1 2446 (int)readl(&board_ctrl->n_channel);
02f1175c
JS		 2447 cinfo->intr_enabled = 1;
2448 }
1da177e4 2449 }
02f1175c
JS		 2450#endif /* CONFIG_CYZ_INTR */
2451 /* Make sure this Z port really exists in hardware */
2452 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2453 return -ENODEV;
1da177e4 2454 }
1da177e4 2455#ifdef CY_DEBUG_OTHER
21719191 2456 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
1da177e4 2457#endif
02f1175c
JS		 2458 tty->driver_data = info;
2459 info->tty = tty;
15ed6cc0 2460 if (serial_paranoia_check(info, tty->name, "cy_open"))
02f1175c 2461 return -ENODEV;
15ed6cc0 2462
1da177e4 2463#ifdef CY_DEBUG_OPEN
21719191
JS		 2464 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2465 info->count);
1da177e4 2466#endif
02f1175c 2467 info->count++;
1da177e4 2468#ifdef CY_DEBUG_COUNT
21719191 2469 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
02f1175c 2470 current->pid, info->count);
1da177e4 2471#endif
1da177e4 2472
02f1175c
JS		 2473 /*
2474 * If the port is the middle of closing, bail out now
2475 */
2476 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2c7fea99
JS		 2477 wait_event_interruptible(info->close_wait,
2478 !(info->flags & ASYNC_CLOSING));
096dcfce 2479 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
02f1175c 2480 }
1da177e4 2481
02f1175c
JS		 2482 /*
2483 * Start up serial port
2484 */
2485 retval = startup(info);
15ed6cc0 2486 if (retval)
02f1175c 2487 return retval;
1da177e4 2488
02f1175c
JS		 2489 retval = block_til_ready(tty, filp, info);
2490 if (retval) {
1da177e4 2491#ifdef CY_DEBUG_OPEN
21719191
JS		 2492 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2493 "with %d\n", retval);
1da177e4 2494#endif
02f1175c
JS		 2495 return retval;
2496 }
1da177e4 2497
02f1175c 2498 info->throttle = 0;
1da177e4 2499
02f1175c 2500#ifdef CY_DEBUG_OPEN
21719191 2501 printk(KERN_DEBUG "cyc:cy_open done\n");
02f1175c
JS		 2502#endif
2503 return 0;
2504} /* cy_open */
1da177e4
LT		 2505
2506/*
2507 * cy_wait_until_sent() --- wait until the transmitter is empty
2508 */
02f1175c 2509static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
1da177e4 2510{
875b206b 2511 struct cyclades_card *card;
cab9bdd1 2512 struct cyclades_port *info = tty->driver_data;
02f1175c 2513 void __iomem *base_addr;
875b206b 2514 int chip, channel, index;
02f1175c
JS		 2515 unsigned long orig_jiffies;
2516 int char_time;
2517
2518 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2519 return;
2520
2521 if (info->xmit_fifo_size == 0)
2522 return; /* Just in case.... */
1da177e4 2523
02f1175c
JS		 2524 orig_jiffies = jiffies;
2525 /*
2526 * Set the check interval to be 1/5 of the estimated time to
2527 * send a single character, and make it at least 1. The check
2528 * interval should also be less than the timeout.
2529 *
2530 * Note: we have to use pretty tight timings here to satisfy
2531 * the NIST-PCTS.
2532 */
2533 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2534 char_time = char_time / 5;
2535 if (char_time <= 0)
2536 char_time = 1;
2537 if (timeout < 0)
2538 timeout = 0;
2539 if (timeout)
2540 char_time = min(char_time, timeout);
2541 /*
2542 * If the transmitter hasn't cleared in twice the approximate
2543 * amount of time to send the entire FIFO, it probably won't
2544 * ever clear. This assumes the UART isn't doing flow
2545 * control, which is currently the case. Hence, if it ever
2546 * takes longer than info->timeout, this is probably due to a
2547 * UART bug of some kind. So, we clamp the timeout parameter at
2548 * 2*info->timeout.
2549 */
2550 if (!timeout || timeout > 2 * info->timeout)
2551 timeout = 2 * info->timeout;
1da177e4 2552#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191
JS		 2553 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2554 timeout, char_time, jiffies);
1da177e4 2555#endif
02f1175c 2556 card = info->card;
875b206b
JS		 2557 channel = (info->line) - (card->first_line);
2558 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 2559 chip = channel >> 2;
2560 channel &= 0x03;
875b206b
JS		 2561 index = card->bus_index;
2562 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
db05c3b1 2563 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
1da177e4 2564#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191 2565 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
1da177e4 2566#endif
02f1175c
JS		 2567 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2568 break;
2569 if (timeout && time_after(jiffies, orig_jiffies +
2570 timeout))
2571 break;
2572 }
1da177e4 2573 }
02f1175c
JS		 2574 /* Run one more char cycle */
2575 msleep_interruptible(jiffies_to_msecs(char_time * 5));
1da177e4 2576#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191 2577 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
1da177e4
LT		 2578#endif
2579}
2580
2581/*
2582 * This routine is called when a particular tty device is closed.
2583 */
02f1175c 2584static void cy_close(struct tty_struct *tty, struct file *filp)
1da177e4 2585{
cab9bdd1 2586 struct cyclades_port *info = tty->driver_data;
9fa1b3b1 2587 struct cyclades_card *card;
02f1175c 2588 unsigned long flags;
1da177e4
LT		 2589
2590#ifdef CY_DEBUG_OTHER
21719191 2591 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
1da177e4
LT		 2592#endif
2593
15ed6cc0 2594 if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
02f1175c 2595 return;
1da177e4 2596
9fa1b3b1
JS		 2597 card = info->card;
2598
2599 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2600 /* If the TTY is being hung up, nothing to do */
2601 if (tty_hung_up_p(filp)) {
9fa1b3b1 2602 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2603 return;
2604 }
1da177e4 2605#ifdef CY_DEBUG_OPEN
21719191
JS		 2606 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2607 info->count);
1da177e4 2608#endif
02f1175c
JS		 2609 if ((tty->count == 1) && (info->count != 1)) {
2610 /*
2611 * Uh, oh. tty->count is 1, which means that the tty
2612 * structure will be freed. Info->count should always
2613 * be one in these conditions. If it's greater than
2614 * one, we've got real problems, since it means the
2615 * serial port won't be shutdown.
2616 */
21719191
JS		 2617 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2618 "tty->count is 1, info->count is %d\n", info->count);
02f1175c
JS		 2619 info->count = 1;
2620 }
1da177e4 2621#ifdef CY_DEBUG_COUNT
21719191 2622 printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
02f1175c 2623 current->pid, info->count - 1);
1da177e4 2624#endif
02f1175c 2625 if (--info->count < 0) {
1da177e4 2626#ifdef CY_DEBUG_COUNT
21719191 2627 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
1da177e4 2628#endif
02f1175c 2629 info->count = 0;
1da177e4 2630 }
02f1175c 2631 if (info->count) {
9fa1b3b1 2632 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2633 return;
2634 }
2635 info->flags |= ASYNC_CLOSING;
1da177e4 2636
02f1175c
JS		 2637 /*
2638 * Now we wait for the transmit buffer to clear; and we notify
2639 * the line discipline to only process XON/XOFF characters.
2640 */
2641 tty->closing = 1;
9fa1b3b1 2642 spin_unlock_irqrestore(&card->card_lock, flags);
15ed6cc0 2643 if (info->closing_wait != CY_CLOSING_WAIT_NONE)
02f1175c 2644 tty_wait_until_sent(tty, info->closing_wait);
15ed6cc0 2645
9fa1b3b1 2646 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 2647
9fa1b3b1
JS		 2648 if (!IS_CYC_Z(*card)) {
2649 int channel = info->line - card->first_line;
2650 int index = card->bus_index;
2651 void __iomem *base_addr = card->base_addr +
02f1175c
JS		 2652 (cy_chip_offset[channel >> 2] << index);
2653 /* Stop accepting input */
2654 channel &= 0x03;
2655 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2656 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2657 readb(base_addr + (CySRER << index)) & ~CyRxData);
02f1175c 2658 if (info->flags & ASYNC_INITIALIZED) {
15ed6cc0
AC		 2659 /* Waiting for on-board buffers to be empty before
2660 closing the port */
9fa1b3b1 2661 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2662 cy_wait_until_sent(tty, info->timeout);
9fa1b3b1 2663 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2664 }
2665 } else {
2666#ifdef Z_WAKE
15ed6cc0
AC		 2667 /* Waiting for on-board buffers to be empty before closing
2668 the port */
9fa1b3b1 2669 void __iomem *base_addr = card->base_addr;
02f1175c
JS		 2670 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2671 struct ZFW_CTRL __iomem *zfw_ctrl =
db05c3b1 2672 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 2673 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
9fa1b3b1 2674 int channel = info->line - card->first_line;
02f1175c
JS		 2675 int retval;
2676
db05c3b1 2677 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
9fa1b3b1 2678 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
02f1175c 2679 if (retval != 0) {
21719191
JS		 2680 printk(KERN_DEBUG "cyc:cy_close retval on "
2681 "ttyC%d was %x\n", info->line, retval);
02f1175c 2682 }
9fa1b3b1 2683 spin_unlock_irqrestore(&card->card_lock, flags);
2c7fea99 2684 wait_for_completion_interruptible(&info->shutdown_wait);
9fa1b3b1 2685 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 2686 }
1da177e4 2687#endif
02f1175c
JS		 2688 }
2689
9fa1b3b1 2690 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2691 shutdown(info);
2692 if (tty->driver->flush_buffer)
2693 tty->driver->flush_buffer(tty);
2694 tty_ldisc_flush(tty);
9fa1b3b1 2695 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2696
2697 tty->closing = 0;
02f1175c
JS		 2698 info->tty = NULL;
2699 if (info->blocked_open) {
9fa1b3b1 2700 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2701 if (info->close_delay) {
2702 msleep_interruptible(jiffies_to_msecs
2703 (info->close_delay));
2704 }
2705 wake_up_interruptible(&info->open_wait);
9fa1b3b1 2706 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2707 }
2708 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2709 wake_up_interruptible(&info->close_wait);
1da177e4
LT		 2710
2711#ifdef CY_DEBUG_OTHER
21719191 2712 printk(KERN_DEBUG "cyc:cy_close done\n");
1da177e4
LT		 2713#endif
2714
9fa1b3b1 2715 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2716} /* cy_close */
1da177e4
LT		 2717
2718/* This routine gets called when tty_write has put something into
2719 * the write_queue. The characters may come from user space or
2720 * kernel space.
2721 *
2722 * This routine will return the number of characters actually
2723 * accepted for writing.
2724 *
2725 * If the port is not already transmitting stuff, start it off by
2726 * enabling interrupts. The interrupt service routine will then
2727 * ensure that the characters are sent.
2728 * If the port is already active, there is no need to kick it.
2729 *
2730 */
02f1175c 2731static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1da177e4 2732{
cab9bdd1 2733 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 2734 unsigned long flags;
2735 int c, ret = 0;
1da177e4
LT		 2736
2737#ifdef CY_DEBUG_IO
21719191 2738 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
1da177e4
LT		 2739#endif
2740
15ed6cc0 2741 if (serial_paranoia_check(info, tty->name, "cy_write"))
02f1175c 2742 return 0;
1da177e4 2743
02f1175c
JS		 2744 if (!info->xmit_buf)
2745 return 0;
1da177e4 2746
9fa1b3b1 2747 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 2748 while (1) {
1a4e2351
HH		 2749 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
2750 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
02f1175c
JS		 2751
2752 if (c <= 0)
2753 break;
2754
2755 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2756 info->xmit_head = (info->xmit_head + c) &
2757 (SERIAL_XMIT_SIZE - 1);
2758 info->xmit_cnt += c;
2759 buf += c;
2760 count -= c;
2761 ret += c;
2762 }
9fa1b3b1 2763 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c
JS		 2764
2765 info->idle_stats.xmit_bytes += ret;
2766 info->idle_stats.xmit_idle = jiffies;
2767
15ed6cc0 2768 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
02f1175c 2769 start_xmit(info);
15ed6cc0 2770
02f1175c
JS		 2771 return ret;
2772} /* cy_write */
1da177e4
LT		 2773
2774/*
2775 * This routine is called by the kernel to write a single
2776 * character to the tty device. If the kernel uses this routine,
2777 * it must call the flush_chars() routine (if defined) when it is
2778 * done stuffing characters into the driver. If there is no room
2779 * in the queue, the character is ignored.
2780 */
02f1175c 2781static void cy_put_char(struct tty_struct *tty, unsigned char ch)
1da177e4 2782{
cab9bdd1 2783 struct cyclades_port *info = tty->driver_data;
02f1175c 2784 unsigned long flags;
1da177e4
LT		 2785
2786#ifdef CY_DEBUG_IO
21719191 2787 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
1da177e4
LT		 2788#endif
2789
02f1175c
JS		 2790 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2791 return;
1da177e4 2792
02f1175c
JS		 2793 if (!info->xmit_buf)
2794 return;
1da177e4 2795
9fa1b3b1 2796 spin_lock_irqsave(&info->card->card_lock, flags);
90cc3018 2797 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
9fa1b3b1 2798 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c
JS		 2799 return;
2800 }
1da177e4 2801
02f1175c
JS		 2802 info->xmit_buf[info->xmit_head++] = ch;
2803 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2804 info->xmit_cnt++;
1da177e4
LT		 2805 info->idle_stats.xmit_bytes++;
2806 info->idle_stats.xmit_idle = jiffies;
9fa1b3b1 2807 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c 2808} /* cy_put_char */
1da177e4
LT		 2809
2810/*
2811 * This routine is called by the kernel after it has written a
15ed6cc0 2812 * series of characters to the tty device using put_char().
1da177e4 2813 */
02f1175c 2814static void cy_flush_chars(struct tty_struct *tty)
1da177e4 2815{
cab9bdd1 2816 struct cyclades_port *info = tty->driver_data;
02f1175c 2817
1da177e4 2818#ifdef CY_DEBUG_IO
21719191 2819 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
1da177e4
LT		 2820#endif
2821
02f1175c
JS		 2822 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2823 return;
1da177e4 2824
02f1175c
JS		 2825 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2826 !info->xmit_buf)
2827 return;
1da177e4 2828
02f1175c
JS		 2829 start_xmit(info);
2830} /* cy_flush_chars */
1da177e4
LT		 2831
2832/*
2833 * This routine returns the numbers of characters the tty driver
2834 * will accept for queuing to be written. This number is subject
2835 * to change as output buffers get emptied, or if the output flow
2836 * control is activated.
2837 */
02f1175c 2838static int cy_write_room(struct tty_struct *tty)
1da177e4 2839{
cab9bdd1 2840 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 2841 int ret;
2842
1da177e4 2843#ifdef CY_DEBUG_IO
21719191 2844 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
1da177e4
LT		 2845#endif
2846
02f1175c
JS		 2847 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2848 return 0;
2849 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2850 if (ret < 0)
2851 ret = 0;
2852 return ret;
2853} /* cy_write_room */
1da177e4 2854
02f1175c 2855static int cy_chars_in_buffer(struct tty_struct *tty)
1da177e4 2856{
875b206b 2857 struct cyclades_card *card;
cab9bdd1 2858 struct cyclades_port *info = tty->driver_data;
875b206b 2859 int channel;
1da177e4 2860
02f1175c
JS		 2861 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2862 return 0;
2863
2864 card = info->card;
875b206b 2865 channel = (info->line) - (card->first_line);
1da177e4
LT		 2866
2867#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c
JS		 2868 if (!IS_CYC_Z(cy_card[card])) {
2869#endif /* Z_EXT_CHARS_IN_BUFFER */
1da177e4 2870#ifdef CY_DEBUG_IO
21719191
JS		 2871 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2872 info->line, info->xmit_cnt);
1da177e4 2873#endif
02f1175c 2874 return info->xmit_cnt;
1da177e4 2875#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c 2876 } else {
ad39c300
JS		 2877 static struct FIRM_ID *firm_id;
2878 static struct ZFW_CTRL *zfw_ctrl;
2879 static struct CH_CTRL *ch_ctrl;
2880 static struct BUF_CTRL *buf_ctrl;
02f1175c 2881 int char_count;
ad39c300 2882 __u32 tx_put, tx_get, tx_bufsize;
02f1175c 2883
875b206b
JS		 2884 firm_id = card->base_addr + ID_ADDRESS;
2885 zfw_ctrl = card->base_addr +
db05c3b1 2886 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2887 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2888 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2889
db05c3b1
JS		 2890 tx_get = readl(&buf_ctrl->tx_get);
2891 tx_put = readl(&buf_ctrl->tx_put);
2892 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
02f1175c
JS		 2893 if (tx_put >= tx_get)
2894 char_count = tx_put - tx_get;
2895 else
2896 char_count = tx_put - tx_get + tx_bufsize;
1da177e4 2897#ifdef CY_DEBUG_IO
21719191
JS		 2898 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2899 info->line, info->xmit_cnt + char_count);
1da177e4 2900#endif
096dcfce 2901 return info->xmit_cnt + char_count;
02f1175c
JS		 2902 }
2903#endif /* Z_EXT_CHARS_IN_BUFFER */
2904} /* cy_chars_in_buffer */
1da177e4
LT		 2905
2906/*
2907 * ------------------------------------------------------------
2908 * cy_ioctl() and friends
2909 * ------------------------------------------------------------
2910 */
2911
1a86b5e3 2912static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
1da177e4 2913{
02f1175c 2914 int co, co_val, bpr;
1a86b5e3 2915 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
02f1175c 2916 25000000);
1da177e4 2917
02f1175c
JS		 2918 if (baud == 0) {
2919 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2920 return;
2921 }
1da177e4 2922
02f1175c
JS		 2923 /* determine which prescaler to use */
2924 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2925 if (cy_clock / co_val / baud > 63)
2926 break;
2927 }
1da177e4 2928
02f1175c
JS		 2929 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2930 if (bpr > 255)
2931 bpr = 255;
1da177e4 2932
02f1175c
JS		 2933 info->tbpr = info->rbpr = bpr;
2934 info->tco = info->rco = co;
1da177e4
LT		 2935}
2936
2937/*
2938 * This routine finds or computes the various line characteristics.
2939 * It used to be called config_setup
2940 */
02f1175c 2941static void set_line_char(struct cyclades_port *info)
1da177e4 2942{
875b206b 2943 struct cyclades_card *card;
02f1175c
JS		 2944 unsigned long flags;
2945 void __iomem *base_addr;
875b206b 2946 int chip, channel, index;
02f1175c
JS		 2947 unsigned cflag, iflag;
2948 unsigned short chip_number;
2949 int baud, baud_rate = 0;
2950 int i;
2951
15ed6cc0 2952 if (!info->tty || !info->tty->termios)
02f1175c 2953 return;
15ed6cc0
AC		 2954
2955 if (info->line == -1)
02f1175c 2956 return;
15ed6cc0 2957
02f1175c
JS		 2958 cflag = info->tty->termios->c_cflag;
2959 iflag = info->tty->termios->c_iflag;
1da177e4 2960
02f1175c
JS		 2961 /*
2962 * Set up the tty->alt_speed kludge
2963 */
2964 if (info->tty) {
2965 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2966 info->tty->alt_speed = 57600;
2967 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2968 info->tty->alt_speed = 115200;
2969 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2970 info->tty->alt_speed = 230400;
2971 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2972 info->tty->alt_speed = 460800;
1da177e4 2973 }
02f1175c
JS		 2974
2975 card = info->card;
875b206b 2976 channel = info->line - card->first_line;
02f1175c
JS		 2977 chip_number = channel / 4;
2978
875b206b 2979 if (!IS_CYC_Z(*card)) {
02f1175c 2980
875b206b 2981 index = card->bus_index;
02f1175c
JS		 2982
2983 /* baud rate */
2984 baud = tty_get_baud_rate(info->tty);
2985 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
2986 ASYNC_SPD_CUST) {
2987 if (info->custom_divisor)
2988 baud_rate = info->baud / info->custom_divisor;
2989 else
2990 baud_rate = info->baud;
2991 } else if (baud > CD1400_MAX_SPEED) {
2992 baud = CD1400_MAX_SPEED;
2993 }
2994 /* find the baud index */
2995 for (i = 0; i < 20; i++) {
15ed6cc0 2996 if (baud == baud_table[i])
02f1175c 2997 break;
02f1175c 2998 }
15ed6cc0 2999 if (i == 20)
02f1175c 3000 i = 19; /* CD1400_MAX_SPEED */
02f1175c
JS		 3001
3002 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3003 ASYNC_SPD_CUST) {
3004 cyy_baud_calc(info, baud_rate);
3005 } else {
3006 if (info->chip_rev >= CD1400_REV_J) {
3007 /* It is a CD1400 rev. J or later */
3008 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3009 info->tco = baud_co_60[i]; /* Tx CO */
3010 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3011 info->rco = baud_co_60[i]; /* Rx CO */
3012 } else {
3013 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3014 info->tco = baud_co_25[i]; /* Tx CO */
3015 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3016 info->rco = baud_co_25[i]; /* Rx CO */
3017 }
3018 }
3019 if (baud_table[i] == 134) {
3020 /* get it right for 134.5 baud */
3021 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3022 2;
3023 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3024 ASYNC_SPD_CUST) {
3025 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3026 baud_rate) + 2;
3027 } else if (baud_table[i]) {
3028 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3029 baud_table[i]) + 2;
3030 /* this needs to be propagated into the card info */
3031 } else {
3032 info->timeout = 0;
3033 }
3034 /* By tradition (is it a standard?) a baud rate of zero
3035 implies the line should be/has been closed. A bit
3036 later in this routine such a test is performed. */
3037
3038 /* byte size and parity */
3039 info->cor5 = 0;
3040 info->cor4 = 0;
3041 /* receive threshold */
3042 info->cor3 = (info->default_threshold ?
3043 info->default_threshold : baud_cor3[i]);
3044 info->cor2 = CyETC;
3045 switch (cflag & CSIZE) {
3046 case CS5:
3047 info->cor1 = Cy_5_BITS;
3048 break;
3049 case CS6:
3050 info->cor1 = Cy_6_BITS;
3051 break;
3052 case CS7:
3053 info->cor1 = Cy_7_BITS;
3054 break;
3055 case CS8:
3056 info->cor1 = Cy_8_BITS;
3057 break;
3058 }
15ed6cc0 3059 if (cflag & CSTOPB)
02f1175c 3060 info->cor1 |= Cy_2_STOP;
15ed6cc0 3061
02f1175c 3062 if (cflag & PARENB) {
15ed6cc0 3063 if (cflag & PARODD)
02f1175c 3064 info->cor1 |= CyPARITY_O;
15ed6cc0 3065 else
02f1175c 3066 info->cor1 |= CyPARITY_E;
15ed6cc0 3067 } else
02f1175c 3068 info->cor1 |= CyPARITY_NONE;
02f1175c
JS		 3069
3070 /* CTS flow control flag */
3071 if (cflag & CRTSCTS) {
3072 info->flags |= ASYNC_CTS_FLOW;
3073 info->cor2 |= CyCtsAE;
3074 } else {
3075 info->flags &= ~ASYNC_CTS_FLOW;
3076 info->cor2 &= ~CyCtsAE;
3077 }
3078 if (cflag & CLOCAL)
3079 info->flags &= ~ASYNC_CHECK_CD;
3080 else
3081 info->flags |= ASYNC_CHECK_CD;
1da177e4
LT		 3082
3083 /***********************************************
3084 The hardware option, CyRtsAO, presents RTS when
3085 the chip has characters to send. Since most modems
3086 use RTS as reverse (inbound) flow control, this
3087 option is not used. If inbound flow control is
3088 necessary, DTR can be programmed to provide the
3089 appropriate signals for use with a non-standard
3090 cable. Contact Marcio Saito for details.
3091 ***********************************************/
3092
02f1175c
JS		 3093 chip = channel >> 2;
3094 channel &= 0x03;
875b206b 3095 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4 3096
9fa1b3b1 3097 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3098 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3099
3100 /* tx and rx baud rate */
3101
3102 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3103 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3104 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3105 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3106
3107 /* set line characteristics according configuration */
3108
3109 cy_writeb(base_addr + (CySCHR1 << index),
3110 START_CHAR(info->tty));
3111 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3112 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3113 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3114 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3115 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3116 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3117
3118 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3119 CyCOR3ch, index);
3120
15ed6cc0
AC		 3121 /* !!! Is this needed? */
3122 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
02f1175c
JS		 3123 cy_writeb(base_addr + (CyRTPR << index),
3124 (info->default_timeout ? info->default_timeout : 0x02));
3125 /* 10ms rx timeout */
3126
3127 if (C_CLOCAL(info->tty)) {
3128 /* without modem intr */
3129 cy_writeb(base_addr + (CySRER << index),
db05c3b1 3130 readb(base_addr + (CySRER << index)) | CyMdmCh);
02f1175c
JS		 3131 /* act on 1->0 modem transitions */
3132 if ((cflag & CRTSCTS) && info->rflow) {
3133 cy_writeb(base_addr + (CyMCOR1 << index),
3134 (CyCTS | rflow_thr[i]));
3135 } else {
3136 cy_writeb(base_addr + (CyMCOR1 << index),
3137 CyCTS);
3138 }
3139 /* act on 0->1 modem transitions */
3140 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
1da177e4 3141 } else {
02f1175c
JS		 3142 /* without modem intr */
3143 cy_writeb(base_addr + (CySRER << index),
db05c3b1 3144 readb(base_addr +
02f1175c
JS		 3145 (CySRER << index)) | CyMdmCh);
3146 /* act on 1->0 modem transitions */
3147 if ((cflag & CRTSCTS) && info->rflow) {
3148 cy_writeb(base_addr + (CyMCOR1 << index),
3149 (CyDSR | CyCTS | CyRI | CyDCD |
3150 rflow_thr[i]));
3151 } else {
3152 cy_writeb(base_addr + (CyMCOR1 << index),
3153 CyDSR | CyCTS | CyRI | CyDCD);
3154 }
3155 /* act on 0->1 modem transitions */
3156 cy_writeb(base_addr + (CyMCOR2 << index),
3157 CyDSR | CyCTS | CyRI | CyDCD);
1da177e4 3158 }
02f1175c
JS		 3159
3160 if (i == 0) { /* baud rate is zero, turn off line */
3161 if (info->rtsdtr_inv) {
3162 cy_writeb(base_addr + (CyMSVR1 << index),
3163 ~CyRTS);
3164 } else {
3165 cy_writeb(base_addr + (CyMSVR2 << index),
3166 ~CyDTR);
3167 }
1da177e4 3168#ifdef CY_DEBUG_DTR
21719191
JS		 3169 printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3170 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3171 readb(base_addr + (CyMSVR1 << index)),
3172 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3173#endif
02f1175c
JS		 3174 } else {
3175 if (info->rtsdtr_inv) {
3176 cy_writeb(base_addr + (CyMSVR1 << index),
3177 CyRTS);
3178 } else {
3179 cy_writeb(base_addr + (CyMSVR2 << index),
3180 CyDTR);
3181 }
1da177e4 3182#ifdef CY_DEBUG_DTR
21719191
JS		 3183 printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3184 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3185 readb(base_addr + (CyMSVR1 << index)),
3186 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3187#endif
02f1175c 3188 }
1da177e4 3189
15ed6cc0 3190 if (info->tty)
02f1175c 3191 clear_bit(TTY_IO_ERROR, &info->tty->flags);
9fa1b3b1 3192 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 3193
1da177e4 3194 } else {
02f1175c
JS		 3195 struct FIRM_ID __iomem *firm_id;
3196 struct ZFW_CTRL __iomem *zfw_ctrl;
3197 struct BOARD_CTRL __iomem *board_ctrl;
3198 struct CH_CTRL __iomem *ch_ctrl;
3199 struct BUF_CTRL __iomem *buf_ctrl;
1a86b5e3 3200 __u32 sw_flow;
02f1175c 3201 int retval;
1da177e4 3202
875b206b 3203 firm_id = card->base_addr + ID_ADDRESS;
15ed6cc0 3204 if (!ISZLOADED(*card))
02f1175c 3205 return;
1da177e4 3206
875b206b 3207 zfw_ctrl = card->base_addr +
db05c3b1 3208 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3209 board_ctrl = &zfw_ctrl->board_ctrl;
3210 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3211 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3212
3213 /* baud rate */
3214 baud = tty_get_baud_rate(info->tty);
3215 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3216 ASYNC_SPD_CUST) {
3217 if (info->custom_divisor)
3218 baud_rate = info->baud / info->custom_divisor;
3219 else
3220 baud_rate = info->baud;
3221 } else if (baud > CYZ_MAX_SPEED) {
3222 baud = CYZ_MAX_SPEED;
3223 }
3224 cy_writel(&ch_ctrl->comm_baud, baud);
3225
3226 if (baud == 134) {
3227 /* get it right for 134.5 baud */
3228 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3229 2;
3230 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3231 ASYNC_SPD_CUST) {
3232 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3233 baud_rate) + 2;
3234 } else if (baud) {
3235 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3236 baud) + 2;
3237 /* this needs to be propagated into the card info */
3238 } else {
3239 info->timeout = 0;
3240 }
1da177e4 3241
02f1175c
JS		 3242 /* byte size and parity */
3243 switch (cflag & CSIZE) {
3244 case CS5:
3245 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3246 break;
3247 case CS6:
3248 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3249 break;
3250 case CS7:
3251 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3252 break;
3253 case CS8:
3254 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3255 break;
3256 }
3257 if (cflag & CSTOPB) {
3258 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 3259 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
02f1175c
JS		 3260 } else {
3261 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 3262 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
02f1175c
JS		 3263 }
3264 if (cflag & PARENB) {
15ed6cc0 3265 if (cflag & PARODD)
02f1175c 3266 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
15ed6cc0 3267 else
02f1175c 3268 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
15ed6cc0 3269 } else
02f1175c 3270 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
1da177e4 3271
02f1175c
JS		 3272 /* CTS flow control flag */
3273 if (cflag & CRTSCTS) {
3274 cy_writel(&ch_ctrl->hw_flow,
db05c3b1 3275 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
02f1175c 3276 } else {
db05c3b1
JS		 3277 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3278 ~(C_RS_CTS | C_RS_RTS));
02f1175c
JS		 3279 }
3280 /* As the HW flow control is done in firmware, the driver
3281 doesn't need to care about it */
3282 info->flags &= ~ASYNC_CTS_FLOW;
3283
3284 /* XON/XOFF/XANY flow control flags */
3285 sw_flow = 0;
3286 if (iflag & IXON) {
3287 sw_flow |= C_FL_OXX;
3288 if (iflag & IXANY)
3289 sw_flow |= C_FL_OIXANY;
3290 }
3291 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3292
875b206b 3293 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
02f1175c 3294 if (retval != 0) {
21719191
JS		 3295 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3296 "was %x\n", info->line, retval);
02f1175c
JS		 3297 }
3298
3299 /* CD sensitivity */
15ed6cc0 3300 if (cflag & CLOCAL)
02f1175c 3301 info->flags &= ~ASYNC_CHECK_CD;
15ed6cc0 3302 else
02f1175c 3303 info->flags |= ASYNC_CHECK_CD;
1da177e4 3304
02f1175c
JS		 3305 if (baud == 0) { /* baud rate is zero, turn off line */
3306 cy_writel(&ch_ctrl->rs_control,
db05c3b1 3307 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
1da177e4 3308#ifdef CY_DEBUG_DTR
21719191 3309 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
1da177e4 3310#endif
02f1175c
JS		 3311 } else {
3312 cy_writel(&ch_ctrl->rs_control,
db05c3b1 3313 readl(&ch_ctrl->rs_control) | C_RS_DTR);
1da177e4 3314#ifdef CY_DEBUG_DTR
21719191 3315 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
1da177e4 3316#endif
02f1175c 3317 }
1da177e4 3318
15ed6cc0 3319 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
02f1175c 3320 if (retval != 0) {
21719191
JS		 3321 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3322 "was %x\n", info->line, retval);
02f1175c 3323 }
1da177e4 3324
15ed6cc0 3325 if (info->tty)
02f1175c 3326 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1da177e4 3327 }
02f1175c 3328} /* set_line_char */
1da177e4
LT		 3329
3330static int
02f1175c 3331get_serial_info(struct cyclades_port *info,
15ed6cc0 3332 struct serial_struct __user *retinfo)
1da177e4 3333{
02f1175c 3334 struct serial_struct tmp;
875b206b 3335 struct cyclades_card *cinfo = info->card;
1da177e4 3336
02f1175c
JS		 3337 if (!retinfo)
3338 return -EFAULT;
3339 memset(&tmp, 0, sizeof(tmp));
3340 tmp.type = info->type;
3341 tmp.line = info->line;
875b206b
JS		 3342 tmp.port = (info->card - cy_card) * 0x100 + info->line -
3343 cinfo->first_line;
02f1175c
JS		 3344 tmp.irq = cinfo->irq;
3345 tmp.flags = info->flags;
3346 tmp.close_delay = info->close_delay;
d5dedf99 3347 tmp.closing_wait = info->closing_wait;
02f1175c
JS		 3348 tmp.baud_base = info->baud;
3349 tmp.custom_divisor = info->custom_divisor;
3350 tmp.hub6 = 0; /*!!! */
3351 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3352} /* get_serial_info */
1da177e4
LT		 3353
3354static int
02f1175c 3355set_serial_info(struct cyclades_port *info,
15ed6cc0 3356 struct serial_struct __user *new_info)
1da177e4 3357{
02f1175c
JS		 3358 struct serial_struct new_serial;
3359 struct cyclades_port old_info;
3360
3361 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3362 return -EFAULT;
3363 old_info = *info;
3364
3365 if (!capable(CAP_SYS_ADMIN)) {
3366 if (new_serial.close_delay != info->close_delay ||
3367 new_serial.baud_base != info->baud ||
3368 (new_serial.flags & ASYNC_FLAGS &
3369 ~ASYNC_USR_MASK) !=
3370 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3371 return -EPERM;
3372 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3373 (new_serial.flags & ASYNC_USR_MASK);
3374 info->baud = new_serial.baud_base;
3375 info->custom_divisor = new_serial.custom_divisor;
3376 goto check_and_exit;
3377 }
3378
3379 /*
3380 * OK, past this point, all the error checking has been done.
3381 * At this point, we start making changes.....
3382 */
3383
3384 info->baud = new_serial.baud_base;
3385 info->custom_divisor = new_serial.custom_divisor;
3386 info->flags = (info->flags & ~ASYNC_FLAGS) |
3387 (new_serial.flags & ASYNC_FLAGS);
3388 info->close_delay = new_serial.close_delay * HZ / 100;
3389 info->closing_wait = new_serial.closing_wait * HZ / 100;
1da177e4
LT		 3390
3391check_and_exit:
02f1175c
JS		 3392 if (info->flags & ASYNC_INITIALIZED) {
3393 set_line_char(info);
3394 return 0;
3395 } else {
3396 return startup(info);
3397 }
3398} /* set_serial_info */
1da177e4
LT		 3399
3400/*
3401 * get_lsr_info - get line status register info
3402 *
3403 * Purpose: Let user call ioctl() to get info when the UART physically
3404 * is emptied. On bus types like RS485, the transmitter must
3405 * release the bus after transmitting. This must be done when
3406 * the transmit shift register is empty, not be done when the
3407 * transmit holding register is empty. This functionality
3408 * allows an RS485 driver to be written in user space.
3409 */
15ed6cc0 3410static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
1da177e4 3411{
875b206b
JS		 3412 struct cyclades_card *card;
3413 int chip, channel, index;
02f1175c
JS		 3414 unsigned char status;
3415 unsigned int result;
3416 unsigned long flags;
3417 void __iomem *base_addr;
1da177e4 3418
02f1175c 3419 card = info->card;
875b206b
JS		 3420 channel = (info->line) - (card->first_line);
3421 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3422 chip = channel >> 2;
3423 channel &= 0x03;
875b206b
JS		 3424 index = card->bus_index;
3425 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 3426
9fa1b3b1 3427 spin_lock_irqsave(&card->card_lock, flags);
db05c3b1 3428 status = readb(base_addr + (CySRER << index)) &
02f1175c 3429 (CyTxRdy | CyTxMpty);
9fa1b3b1 3430 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3431 result = (status ? 0 : TIOCSER_TEMT);
3432 } else {
3433 /* Not supported yet */
3434 return -EINVAL;
3435 }
3436 return put_user(result, (unsigned long __user *)value);
1da177e4
LT		 3437}
3438
02f1175c 3439static int cy_tiocmget(struct tty_struct *tty, struct file *file)
1da177e4 3440{
cab9bdd1 3441 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 3442 struct cyclades_card *card;
3443 int chip, channel, index;
02f1175c
JS		 3444 void __iomem *base_addr;
3445 unsigned long flags;
3446 unsigned char status;
3447 unsigned long lstatus;
3448 unsigned int result;
3449 struct FIRM_ID __iomem *firm_id;
3450 struct ZFW_CTRL __iomem *zfw_ctrl;
3451 struct BOARD_CTRL __iomem *board_ctrl;
3452 struct CH_CTRL __iomem *ch_ctrl;
3453
3454 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3455 return -ENODEV;
1da177e4 3456
7b130c0e
AC		 3457 lock_kernel();
3458
02f1175c 3459 card = info->card;
875b206b
JS		 3460 channel = info->line - card->first_line;
3461 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3462 chip = channel >> 2;
3463 channel &= 0x03;
875b206b
JS		 3464 index = card->bus_index;
3465 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4 3466
9fa1b3b1 3467 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3468 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
db05c3b1
JS		 3469 status = readb(base_addr + (CyMSVR1 << index));
3470 status |= readb(base_addr + (CyMSVR2 << index));
9fa1b3b1 3471 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3472
3473 if (info->rtsdtr_inv) {
3474 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3475 ((status & CyDTR) ? TIOCM_RTS : 0);
3476 } else {
3477 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3478 ((status & CyDTR) ? TIOCM_DTR : 0);
3479 }
3480 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3481 ((status & CyRI) ? TIOCM_RNG : 0) |
3482 ((status & CyDSR) ? TIOCM_DSR : 0) |
3483 ((status & CyCTS) ? TIOCM_CTS : 0);
1da177e4 3484 } else {
875b206b
JS		 3485 base_addr = card->base_addr;
3486 firm_id = card->base_addr + ID_ADDRESS;
3487 if (ISZLOADED(*card)) {
3488 zfw_ctrl = card->base_addr +
db05c3b1 3489 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3490 board_ctrl = &zfw_ctrl->board_ctrl;
3491 ch_ctrl = zfw_ctrl->ch_ctrl;
db05c3b1 3492 lstatus = readl(&ch_ctrl[channel].rs_status);
02f1175c
JS		 3493 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3494 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3495 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3496 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3497 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3498 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3499 } else {
3500 result = 0;
7b130c0e 3501 unlock_kernel();
02f1175c
JS		 3502 return -ENODEV;
3503 }
1da177e4 3504
02f1175c 3505 }
7b130c0e 3506 unlock_kernel();
02f1175c
JS		 3507 return result;
3508} /* cy_tiomget */
1da177e4
LT		 3509
3510static int
3511cy_tiocmset(struct tty_struct *tty, struct file *file,
02f1175c 3512 unsigned int set, unsigned int clear)
1da177e4 3513{
cab9bdd1 3514 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 3515 struct cyclades_card *card;
3516 int chip, channel, index;
02f1175c
JS		 3517 void __iomem *base_addr;
3518 unsigned long flags;
3519 struct FIRM_ID __iomem *firm_id;
3520 struct ZFW_CTRL __iomem *zfw_ctrl;
3521 struct BOARD_CTRL __iomem *board_ctrl;
3522 struct CH_CTRL __iomem *ch_ctrl;
3523 int retval;
3524
3525 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3526 return -ENODEV;
3527
3528 card = info->card;
875b206b
JS		 3529 channel = (info->line) - (card->first_line);
3530 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3531 chip = channel >> 2;
3532 channel &= 0x03;
875b206b
JS		 3533 index = card->bus_index;
3534 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c
JS		 3535
3536 if (set & TIOCM_RTS) {
9fa1b3b1 3537 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3538 cy_writeb(base_addr + (CyCAR << index),
3539 (u_char) channel);
3540 if (info->rtsdtr_inv) {
3541 cy_writeb(base_addr + (CyMSVR2 << index),
3542 CyDTR);
3543 } else {
3544 cy_writeb(base_addr + (CyMSVR1 << index),
3545 CyRTS);
3546 }
9fa1b3b1 3547 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3548 }
3549 if (clear & TIOCM_RTS) {
9fa1b3b1 3550 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3551 cy_writeb(base_addr + (CyCAR << index),
3552 (u_char) channel);
3553 if (info->rtsdtr_inv) {
3554 cy_writeb(base_addr + (CyMSVR2 << index),
3555 ~CyDTR);
3556 } else {
3557 cy_writeb(base_addr + (CyMSVR1 << index),
3558 ~CyRTS);
3559 }
9fa1b3b1 3560 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3561 }
3562 if (set & TIOCM_DTR) {
9fa1b3b1 3563 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3564 cy_writeb(base_addr + (CyCAR << index),
3565 (u_char) channel);
3566 if (info->rtsdtr_inv) {
3567 cy_writeb(base_addr + (CyMSVR1 << index),
3568 CyRTS);
3569 } else {
3570 cy_writeb(base_addr + (CyMSVR2 << index),
3571 CyDTR);
3572 }
1da177e4 3573#ifdef CY_DEBUG_DTR
21719191
JS		 3574 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3575 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3576 readb(base_addr + (CyMSVR1 << index)),
3577 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3578#endif
9fa1b3b1 3579 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3580 }
3581 if (clear & TIOCM_DTR) {
9fa1b3b1 3582 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3583 cy_writeb(base_addr + (CyCAR << index),
3584 (u_char) channel);
3585 if (info->rtsdtr_inv) {
3586 cy_writeb(base_addr + (CyMSVR1 << index),
3587 ~CyRTS);
3588 } else {
3589 cy_writeb(base_addr + (CyMSVR2 << index),
3590 ~CyDTR);
3591 }
1da177e4
LT		 3592
3593#ifdef CY_DEBUG_DTR
21719191
JS		 3594 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3595 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3596 readb(base_addr + (CyMSVR1 << index)),
3597 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3598#endif
9fa1b3b1 3599 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3600 }
3601 } else {
875b206b 3602 base_addr = card->base_addr;
02f1175c 3603
875b206b
JS		 3604 firm_id = card->base_addr + ID_ADDRESS;
3605 if (ISZLOADED(*card)) {
3606 zfw_ctrl = card->base_addr +
db05c3b1 3607 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3608 board_ctrl = &zfw_ctrl->board_ctrl;
3609 ch_ctrl = zfw_ctrl->ch_ctrl;
3610
3611 if (set & TIOCM_RTS) {
9fa1b3b1 3612 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3613 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3614 readl(&ch_ctrl[channel].rs_control) |
3615 C_RS_RTS);
9fa1b3b1 3616 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3617 }
3618 if (clear & TIOCM_RTS) {
9fa1b3b1 3619 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3620 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3621 readl(&ch_ctrl[channel].rs_control) &
3622 ~C_RS_RTS);
9fa1b3b1 3623 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3624 }
3625 if (set & TIOCM_DTR) {
9fa1b3b1 3626 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3627 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3628 readl(&ch_ctrl[channel].rs_control) |
3629 C_RS_DTR);
1da177e4 3630#ifdef CY_DEBUG_DTR
21719191
JS		 3631 printk(KERN_DEBUG "cyc:set_modem_info raising "
3632 "Z DTR\n");
1da177e4 3633#endif
9fa1b3b1 3634 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3635 }
3636 if (clear & TIOCM_DTR) {
9fa1b3b1 3637 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3638 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3639 readl(&ch_ctrl[channel].rs_control) &
3640 ~C_RS_DTR);
1da177e4 3641#ifdef CY_DEBUG_DTR
21719191
JS		 3642 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3643 "Z DTR\n");
1da177e4 3644#endif
9fa1b3b1 3645 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3646 }
3647 } else {
3648 return -ENODEV;
3649 }
9fa1b3b1
JS		 3650 spin_lock_irqsave(&card->card_lock, flags);
3651 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
02f1175c 3652 if (retval != 0) {
21719191
JS		 3653 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3654 "was %x\n", info->line, retval);
02f1175c 3655 }
9fa1b3b1 3656 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 3657 }
02f1175c
JS		 3658 return 0;
3659} /* cy_tiocmset */
1da177e4
LT		 3660
3661/*
3662 * cy_break() --- routine which turns the break handling on or off
3663 */
02f1175c 3664static void cy_break(struct tty_struct *tty, int break_state)
1da177e4 3665{
cab9bdd1 3666 struct cyclades_port *info = tty->driver_data;
9fa1b3b1 3667 struct cyclades_card *card;
02f1175c 3668 unsigned long flags;
1da177e4 3669
02f1175c
JS		 3670 if (serial_paranoia_check(info, tty->name, "cy_break"))
3671 return;
1da177e4 3672
9fa1b3b1
JS		 3673 card = info->card;
3674
3675 spin_lock_irqsave(&card->card_lock, flags);
3676 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3677 /* Let the transmit ISR take care of this (since it
3678 requires stuffing characters into the output stream).
3679 */
3680 if (break_state == -1) {
3681 if (!info->breakon) {
3682 info->breakon = 1;
3683 if (!info->xmit_cnt) {
9fa1b3b1 3684 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 3685 start_xmit(info);
9fa1b3b1 3686 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3687 }
3688 }
3689 } else {
3690 if (!info->breakoff) {
3691 info->breakoff = 1;
3692 if (!info->xmit_cnt) {
9fa1b3b1 3693 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 3694 start_xmit(info);
9fa1b3b1 3695 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3696 }
3697 }
1da177e4 3698 }
1da177e4 3699 } else {
02f1175c
JS		 3700 int retval;
3701
3702 if (break_state == -1) {
9fa1b3b1
JS		 3703 retval = cyz_issue_cmd(card,
3704 info->line - card->first_line,
02f1175c
JS		 3705 C_CM_SET_BREAK, 0L);
3706 if (retval != 0) {
21719191
JS		 3707 printk(KERN_ERR "cyc:cy_break (set) retval on "
3708 "ttyC%d was %x\n", info->line, retval);
02f1175c
JS		 3709 }
3710 } else {
9fa1b3b1
JS		 3711 retval = cyz_issue_cmd(card,
3712 info->line - card->first_line,
02f1175c
JS		 3713 C_CM_CLR_BREAK, 0L);
3714 if (retval != 0) {
21719191
JS		 3715 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3716 "on ttyC%d was %x\n", info->line,
3717 retval);
02f1175c 3718 }
1da177e4 3719 }
1da177e4 3720 }
9fa1b3b1 3721 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 3722} /* cy_break */
1da177e4 3723
15ed6cc0
AC		 3724static int get_mon_info(struct cyclades_port *info,
3725 struct cyclades_monitor __user *mon)
1da177e4
LT		 3726{
3727
02f1175c
JS		 3728 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3729 return -EFAULT;
3730 info->mon.int_count = 0;
3731 info->mon.char_count = 0;
3732 info->mon.char_max = 0;
3733 info->mon.char_last = 0;
3734 return 0;
3735} /* get_mon_info */
1da177e4 3736
02f1175c 3737static int set_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 3738{
875b206b 3739 struct cyclades_card *card;
02f1175c 3740 void __iomem *base_addr;
875b206b 3741 int channel, chip, index;
02f1175c 3742 unsigned long flags;
1da177e4 3743
02f1175c 3744 card = info->card;
875b206b
JS		 3745 channel = info->line - card->first_line;
3746 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3747 chip = channel >> 2;
3748 channel &= 0x03;
875b206b 3749 index = card->bus_index;
02f1175c 3750 base_addr =
875b206b 3751 card->base_addr + (cy_chip_offset[chip] << index);
02f1175c
JS		 3752
3753 info->cor3 &= ~CyREC_FIFO;
3754 info->cor3 |= value & CyREC_FIFO;
1da177e4 3755
9fa1b3b1 3756 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3757 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3758 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
9fa1b3b1 3759 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3760 }
3761 return 0;
3762} /* set_threshold */
1da177e4 3763
15ed6cc0
AC		 3764static int get_threshold(struct cyclades_port *info,
3765 unsigned long __user *value)
1da177e4 3766{
875b206b 3767 struct cyclades_card *card;
02f1175c 3768 void __iomem *base_addr;
875b206b 3769 int channel, chip, index;
02f1175c 3770 unsigned long tmp;
1da177e4 3771
02f1175c 3772 card = info->card;
875b206b
JS		 3773 channel = info->line - card->first_line;
3774 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3775 chip = channel >> 2;
3776 channel &= 0x03;
875b206b
JS		 3777 index = card->bus_index;
3778 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 3779
db05c3b1 3780 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
02f1175c 3781 return put_user(tmp, value);
02f1175c 3782 }
f7429034 3783 return 0;
02f1175c 3784} /* get_threshold */
1da177e4 3785
15ed6cc0
AC		 3786static int set_default_threshold(struct cyclades_port *info,
3787 unsigned long value)
1da177e4 3788{
02f1175c
JS		 3789 info->default_threshold = value & 0x0f;
3790 return 0;
3791} /* set_default_threshold */
1da177e4 3792
15ed6cc0
AC		 3793static int get_default_threshold(struct cyclades_port *info,
3794 unsigned long __user *value)
1da177e4 3795{
02f1175c
JS		 3796 return put_user(info->default_threshold, value);
3797} /* get_default_threshold */
1da177e4 3798
02f1175c 3799static int set_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3800{
875b206b 3801 struct cyclades_card *card;
02f1175c 3802 void __iomem *base_addr;
875b206b 3803 int channel, chip, index;
02f1175c 3804 unsigned long flags;
1da177e4 3805
02f1175c 3806 card = info->card;
875b206b
JS		 3807 channel = info->line - card->first_line;
3808 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3809 chip = channel >> 2;
3810 channel &= 0x03;
875b206b
JS		 3811 index = card->bus_index;
3812 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4 3813
9fa1b3b1 3814 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3815 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
9fa1b3b1 3816 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3817 }
3818 return 0;
3819} /* set_timeout */
1da177e4 3820
15ed6cc0
AC		 3821static int get_timeout(struct cyclades_port *info,
3822 unsigned long __user *value)
1da177e4 3823{
875b206b 3824 struct cyclades_card *card;
02f1175c 3825 void __iomem *base_addr;
875b206b 3826 int channel, chip, index;
02f1175c 3827 unsigned long tmp;
1da177e4 3828
02f1175c 3829 card = info->card;
875b206b
JS		 3830 channel = info->line - card->first_line;
3831 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3832 chip = channel >> 2;
3833 channel &= 0x03;
875b206b
JS		 3834 index = card->bus_index;
3835 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 3836
db05c3b1 3837 tmp = readb(base_addr + (CyRTPR << index));
02f1175c 3838 return put_user(tmp, value);
02f1175c 3839 }
f7429034 3840 return 0;
02f1175c 3841} /* get_timeout */
1da177e4 3842
02f1175c 3843static int set_default_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3844{
02f1175c
JS		 3845 info->default_timeout = value & 0xff;
3846 return 0;
3847} /* set_default_timeout */
1da177e4 3848
15ed6cc0
AC		 3849static int get_default_timeout(struct cyclades_port *info,
3850 unsigned long __user *value)
1da177e4 3851{
02f1175c
JS		 3852 return put_user(info->default_timeout, value);
3853} /* get_default_timeout */
1da177e4
LT		 3854
3855/*
3856 * This routine allows the tty driver to implement device-
3857 * specific ioctl's. If the ioctl number passed in cmd is
3858 * not recognized by the driver, it should return ENOIOCTLCMD.
3859 */
3860static int
02f1175c
JS		 3861cy_ioctl(struct tty_struct *tty, struct file *file,
3862 unsigned int cmd, unsigned long arg)
1da177e4 3863{
cab9bdd1 3864 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 3865 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3866 struct serial_icounter_struct __user *p_cuser; /* user space */
3867 int ret_val = 0;
3868 unsigned long flags;
3869 void __user *argp = (void __user *)arg;
3870
3871 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3872 return -ENODEV;
1da177e4
LT		 3873
3874#ifdef CY_DEBUG_OTHER
21719191
JS		 3875 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3876 info->line, cmd, arg);
1da177e4 3877#endif
7b130c0e 3878 lock_kernel();
1da177e4 3879
02f1175c
JS		 3880 switch (cmd) {
3881 case CYGETMON:
3882 ret_val = get_mon_info(info, argp);
3883 break;
3884 case CYGETTHRESH:
3885 ret_val = get_threshold(info, argp);
3886 break;
3887 case CYSETTHRESH:
3888 ret_val = set_threshold(info, arg);
3889 break;
3890 case CYGETDEFTHRESH:
3891 ret_val = get_default_threshold(info, argp);
3892 break;
3893 case CYSETDEFTHRESH:
3894 ret_val = set_default_threshold(info, arg);
3895 break;
3896 case CYGETTIMEOUT:
3897 ret_val = get_timeout(info, argp);
3898 break;
3899 case CYSETTIMEOUT:
3900 ret_val = set_timeout(info, arg);
3901 break;
3902 case CYGETDEFTIMEOUT:
3903 ret_val = get_default_timeout(info, argp);
3904 break;
3905 case CYSETDEFTIMEOUT:
3906 ret_val = set_default_timeout(info, arg);
3907 break;
1da177e4 3908 case CYSETRFLOW:
02f1175c
JS		 3909 info->rflow = (int)arg;
3910 ret_val = 0;
3911 break;
1da177e4 3912 case CYGETRFLOW:
02f1175c
JS		 3913 ret_val = info->rflow;
3914 break;
1da177e4 3915 case CYSETRTSDTR_INV:
02f1175c
JS		 3916 info->rtsdtr_inv = (int)arg;
3917 ret_val = 0;
3918 break;
1da177e4 3919 case CYGETRTSDTR_INV:
02f1175c
JS		 3920 ret_val = info->rtsdtr_inv;
3921 break;
1da177e4 3922 case CYGETCD1400VER:
02f1175c
JS		 3923 ret_val = info->chip_rev;
3924 break;
1da177e4
LT		 3925#ifndef CONFIG_CYZ_INTR
3926 case CYZSETPOLLCYCLE:
02f1175c
JS		 3927 cyz_polling_cycle = (arg * HZ) / 1000;
3928 ret_val = 0;
3929 break;
1da177e4 3930 case CYZGETPOLLCYCLE:
02f1175c
JS		 3931 ret_val = (cyz_polling_cycle * 1000) / HZ;
3932 break;
3933#endif /* CONFIG_CYZ_INTR */
1da177e4 3934 case CYSETWAIT:
15ed6cc0 3935 info->closing_wait = (unsigned short)arg * HZ / 100;
02f1175c
JS		 3936 ret_val = 0;
3937 break;
1da177e4 3938 case CYGETWAIT:
02f1175c
JS		 3939 ret_val = info->closing_wait / (HZ / 100);
3940 break;
3941 case TIOCGSERIAL:
3942 ret_val = get_serial_info(info, argp);
3943 break;
3944 case TIOCSSERIAL:
3945 ret_val = set_serial_info(info, argp);
3946 break;
3947 case TIOCSERGETLSR: /* Get line status register */
3948 ret_val = get_lsr_info(info, argp);
3949 break;
3950 /*
3951 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
3952 * - mask passed in arg for lines of interest
3953 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
3954 * Caller should use TIOCGICOUNT to see which one it was
3955 */
1da177e4 3956 case TIOCMIWAIT:
9fa1b3b1 3957 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 3958 /* note the counters on entry */
2c7fea99 3959 cnow = info->icount;
9fa1b3b1 3960 spin_unlock_irqrestore(&info->card->card_lock, flags);
2c7fea99
JS		 3961 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
3962 cprev = cnow;
9fa1b3b1 3963 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 3964 cnow = info->icount; /* atomic copy */
9fa1b3b1 3965 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c 3966
2c7fea99
JS		 3967 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
3968 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
3969 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
3970 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
3971 }));
3972 break;
1da177e4 3973
02f1175c
JS		 3974 /*
3975 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
3976 * Return: write counters to the user passed counter struct
3977 * NB: both 1->0 and 0->1 transitions are counted except for
3978 * RI where only 0->1 is counted.
3979 */
1da177e4 3980 case TIOCGICOUNT:
9fa1b3b1 3981 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 3982 cnow = info->icount;
9fa1b3b1 3983 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c
JS		 3984 p_cuser = argp;
3985 ret_val = put_user(cnow.cts, &p_cuser->cts);
3986 if (ret_val)
7b130c0e 3987 break;
02f1175c
JS		 3988 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
3989 if (ret_val)
7b130c0e 3990 break;
02f1175c
JS		 3991 ret_val = put_user(cnow.rng, &p_cuser->rng);
3992 if (ret_val)
7b130c0e 3993 break;
02f1175c
JS		 3994 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
3995 if (ret_val)
7b130c0e 3996 break;
02f1175c
JS		 3997 ret_val = put_user(cnow.rx, &p_cuser->rx);
3998 if (ret_val)
7b130c0e 3999 break;
02f1175c
JS		 4000 ret_val = put_user(cnow.tx, &p_cuser->tx);
4001 if (ret_val)
7b130c0e 4002 break;
02f1175c
JS		 4003 ret_val = put_user(cnow.frame, &p_cuser->frame);
4004 if (ret_val)
7b130c0e 4005 break;
02f1175c
JS		 4006 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4007 if (ret_val)
7b130c0e 4008 break;
02f1175c
JS		 4009 ret_val = put_user(cnow.parity, &p_cuser->parity);
4010 if (ret_val)
7b130c0e 4011 break;
02f1175c
JS		 4012 ret_val = put_user(cnow.brk, &p_cuser->brk);
4013 if (ret_val)
7b130c0e 4014 break;
02f1175c
JS		 4015 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4016 if (ret_val)
7b130c0e 4017 break;
02f1175c
JS		 4018 ret_val = 0;
4019 break;
4020 default:
4021 ret_val = -ENOIOCTLCMD;
4022 }
7b130c0e 4023 unlock_kernel();
1da177e4
LT		 4024
4025#ifdef CY_DEBUG_OTHER
21719191 4026 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
1da177e4 4027#endif
02f1175c
JS		 4028 return ret_val;
4029} /* cy_ioctl */
1da177e4
LT		 4030
4031/*
4032 * This routine allows the tty driver to be notified when
4033 * device's termios settings have changed. Note that a
4034 * well-designed tty driver should be prepared to accept the case
4035 * where old == NULL, and try to do something rational.
4036 */
02f1175c 4037static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 4038{
cab9bdd1 4039 struct cyclades_port *info = tty->driver_data;
1da177e4
LT		 4040
4041#ifdef CY_DEBUG_OTHER
21719191 4042 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
1da177e4
LT		 4043#endif
4044
02f1175c
JS		 4045 set_line_char(info);
4046
4047 if ((old_termios->c_cflag & CRTSCTS) &&
4048 !(tty->termios->c_cflag & CRTSCTS)) {
4049 tty->hw_stopped = 0;
4050 cy_start(tty);
4051 }
1da177e4 4052#if 0
02f1175c
JS		 4053 /*
4054 * No need to wake up processes in open wait, since they
4055 * sample the CLOCAL flag once, and don't recheck it.
4056 * XXX It's not clear whether the current behavior is correct
4057 * or not. Hence, this may change.....
4058 */
4059 if (!(old_termios->c_cflag & CLOCAL) &&
4060 (tty->termios->c_cflag & CLOCAL))
4061 wake_up_interruptible(&info->open_wait);
1da177e4 4062#endif
02f1175c 4063} /* cy_set_termios */
1da177e4
LT		 4064
4065/* This function is used to send a high-priority XON/XOFF character to
4066 the device.
4067*/
02f1175c 4068static void cy_send_xchar(struct tty_struct *tty, char ch)
1da177e4 4069{
cab9bdd1 4070 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 4071 struct cyclades_card *card;
4072 int channel;
1da177e4 4073
02f1175c 4074 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
1da177e4
LT		 4075 return;
4076
02f1175c 4077 info->x_char = ch;
1da177e4
LT		 4078
4079 if (ch)
02f1175c 4080 cy_start(tty);
1da177e4
LT		 4081
4082 card = info->card;
875b206b 4083 channel = info->line - card->first_line;
1da177e4 4084
875b206b 4085 if (IS_CYC_Z(*card)) {
02f1175c 4086 if (ch == STOP_CHAR(tty))
875b206b 4087 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
02f1175c 4088 else if (ch == START_CHAR(tty))
875b206b 4089 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
1da177e4
LT		 4090 }
4091}
4092
4093/* This routine is called by the upper-layer tty layer to signal
4094 that incoming characters should be throttled because the input
4095 buffers are close to full.
4096 */
02f1175c 4097static void cy_throttle(struct tty_struct *tty)
1da177e4 4098{
cab9bdd1 4099 struct cyclades_port *info = tty->driver_data;
875b206b 4100 struct cyclades_card *card;
02f1175c
JS		 4101 unsigned long flags;
4102 void __iomem *base_addr;
875b206b 4103 int chip, channel, index;
1da177e4
LT		 4104
4105#ifdef CY_DEBUG_THROTTLE
02f1175c 4106 char buf[64];
1da177e4 4107
21719191 4108 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
02f1175c 4109 tty->ldisc.chars_in_buffer(tty), info->line);
1da177e4
LT		 4110#endif
4111
15ed6cc0 4112 if (serial_paranoia_check(info, tty->name, "cy_throttle"))
02f1175c 4113 return;
02f1175c
JS		 4114
4115 card = info->card;
4116
4117 if (I_IXOFF(tty)) {
875b206b 4118 if (!IS_CYC_Z(*card))
02f1175c
JS		 4119 cy_send_xchar(tty, STOP_CHAR(tty));
4120 else
4121 info->throttle = 1;
4122 }
1da177e4 4123
02f1175c 4124 if (tty->termios->c_cflag & CRTSCTS) {
875b206b
JS		 4125 channel = info->line - card->first_line;
4126 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 4127 chip = channel >> 2;
4128 channel &= 0x03;
875b206b
JS		 4129 index = card->bus_index;
4130 base_addr = card->base_addr +
02f1175c
JS		 4131 (cy_chip_offset[chip] << index);
4132
9fa1b3b1 4133 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 4134 cy_writeb(base_addr + (CyCAR << index),
4135 (u_char) channel);
4136 if (info->rtsdtr_inv) {
4137 cy_writeb(base_addr + (CyMSVR2 << index),
4138 ~CyDTR);
4139 } else {
4140 cy_writeb(base_addr + (CyMSVR1 << index),
4141 ~CyRTS);
4142 }
9fa1b3b1 4143 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 4144 } else {
4145 info->throttle = 1;
4146 }
4147 }
02f1175c 4148} /* cy_throttle */
1da177e4
LT		 4149
4150/*
4151 * This routine notifies the tty driver that it should signal
4152 * that characters can now be sent to the tty without fear of
4153 * overrunning the input buffers of the line disciplines.
4154 */
02f1175c 4155static void cy_unthrottle(struct tty_struct *tty)
1da177e4 4156{
cab9bdd1 4157 struct cyclades_port *info = tty->driver_data;
875b206b 4158 struct cyclades_card *card;
02f1175c
JS		 4159 unsigned long flags;
4160 void __iomem *base_addr;
875b206b 4161 int chip, channel, index;
1da177e4
LT		 4162
4163#ifdef CY_DEBUG_THROTTLE
02f1175c
JS		 4164 char buf[64];
4165
21719191 4166 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
15ed6cc0 4167 tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
1da177e4
LT		 4168#endif
4169
15ed6cc0 4170 if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
02f1175c 4171 return;
1da177e4 4172
02f1175c
JS		 4173 if (I_IXOFF(tty)) {
4174 if (info->x_char)
4175 info->x_char = 0;
4176 else
4177 cy_send_xchar(tty, START_CHAR(tty));
1da177e4 4178 }
1da177e4 4179
02f1175c
JS		 4180 if (tty->termios->c_cflag & CRTSCTS) {
4181 card = info->card;
875b206b
JS		 4182 channel = info->line - card->first_line;
4183 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 4184 chip = channel >> 2;
4185 channel &= 0x03;
875b206b
JS		 4186 index = card->bus_index;
4187 base_addr = card->base_addr +
02f1175c
JS		 4188 (cy_chip_offset[chip] << index);
4189
9fa1b3b1 4190 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 4191 cy_writeb(base_addr + (CyCAR << index),
4192 (u_char) channel);
4193 if (info->rtsdtr_inv) {
4194 cy_writeb(base_addr + (CyMSVR2 << index),
4195 CyDTR);
4196 } else {
4197 cy_writeb(base_addr + (CyMSVR1 << index),
4198 CyRTS);
4199 }
9fa1b3b1 4200 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 4201 } else {
4202 info->throttle = 0;
4203 }
4204 }
02f1175c 4205} /* cy_unthrottle */
1da177e4
LT		 4206
4207/* cy_start and cy_stop provide software output flow control as a
4208 function of XON/XOFF, software CTS, and other such stuff.
4209*/
02f1175c 4210static void cy_stop(struct tty_struct *tty)
1da177e4 4211{
02f1175c 4212 struct cyclades_card *cinfo;
cab9bdd1 4213 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4214 void __iomem *base_addr;
4215 int chip, channel, index;
4216 unsigned long flags;
1da177e4
LT		 4217
4218#ifdef CY_DEBUG_OTHER
21719191 4219 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
1da177e4
LT		 4220#endif
4221
02f1175c
JS		 4222 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4223 return;
1da177e4 4224
875b206b 4225 cinfo = info->card;
02f1175c
JS		 4226 channel = info->line - cinfo->first_line;
4227 if (!IS_CYC_Z(*cinfo)) {
4228 index = cinfo->bus_index;
4229 chip = channel >> 2;
4230 channel &= 0x03;
9fa1b3b1 4231 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
1da177e4 4232
9fa1b3b1 4233 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 4234 cy_writeb(base_addr + (CyCAR << index),
4235 (u_char)(channel & 0x0003)); /* index channel */
4236 cy_writeb(base_addr + (CySRER << index),
db05c3b1 4237 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
9fa1b3b1 4238 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c 4239 }
02f1175c 4240} /* cy_stop */
1da177e4 4241
02f1175c 4242static void cy_start(struct tty_struct *tty)
1da177e4 4243{
02f1175c 4244 struct cyclades_card *cinfo;
cab9bdd1 4245 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4246 void __iomem *base_addr;
4247 int chip, channel, index;
4248 unsigned long flags;
1da177e4
LT		 4249
4250#ifdef CY_DEBUG_OTHER
21719191 4251 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
1da177e4
LT		 4252#endif
4253
02f1175c
JS		 4254 if (serial_paranoia_check(info, tty->name, "cy_start"))
4255 return;
1da177e4 4256
875b206b 4257 cinfo = info->card;
02f1175c
JS		 4258 channel = info->line - cinfo->first_line;
4259 index = cinfo->bus_index;
4260 if (!IS_CYC_Z(*cinfo)) {
4261 chip = channel >> 2;
4262 channel &= 0x03;
9fa1b3b1 4263 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
1da177e4 4264
9fa1b3b1 4265 spin_lock_irqsave(&cinfo->card_lock, flags);
15ed6cc0
AC		 4266 cy_writeb(base_addr + (CyCAR << index),
4267 (u_char) (channel & 0x0003)); /* index channel */
02f1175c 4268 cy_writeb(base_addr + (CySRER << index),
db05c3b1 4269 readb(base_addr + (CySRER << index)) | CyTxRdy);
9fa1b3b1 4270 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c 4271 }
02f1175c 4272} /* cy_start */
1da177e4 4273
02f1175c 4274static void cy_flush_buffer(struct tty_struct *tty)
1da177e4 4275{
cab9bdd1 4276 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 4277 struct cyclades_card *card;
4278 int channel, retval;
02f1175c
JS		 4279 unsigned long flags;
4280
1da177e4 4281#ifdef CY_DEBUG_IO
21719191 4282 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
1da177e4
LT		 4283#endif
4284
02f1175c
JS		 4285 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4286 return;
1da177e4 4287
02f1175c 4288 card = info->card;
875b206b 4289 channel = info->line - card->first_line;
1da177e4 4290
9fa1b3b1 4291 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 4292 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
9fa1b3b1 4293 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 4294
875b206b 4295 if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board
02f1175c 4296 buffers as well */
9fa1b3b1 4297 spin_lock_irqsave(&card->card_lock, flags);
875b206b 4298 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
02f1175c 4299 if (retval != 0) {
21719191
JS		 4300 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
4301 "was %x\n", info->line, retval);
02f1175c 4302 }
9fa1b3b1 4303 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 4304 }
4305 tty_wakeup(tty);
02f1175c 4306} /* cy_flush_buffer */
1da177e4
LT		 4307
4308/*
4309 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4310 */
02f1175c 4311static void cy_hangup(struct tty_struct *tty)
1da177e4 4312{
cab9bdd1 4313 struct cyclades_port *info = tty->driver_data;
02f1175c 4314
1da177e4 4315#ifdef CY_DEBUG_OTHER
21719191 4316 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
1da177e4
LT		 4317#endif
4318
02f1175c
JS		 4319 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4320 return;
1da177e4 4321
02f1175c
JS		 4322 cy_flush_buffer(tty);
4323 shutdown(info);
02f1175c 4324 info->count = 0;
1da177e4 4325#ifdef CY_DEBUG_COUNT
21719191
JS		 4326 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4327 current->pid);
1da177e4 4328#endif
02f1175c
JS		 4329 info->tty = NULL;
4330 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4331 wake_up_interruptible(&info->open_wait);
4332} /* cy_hangup */
1da177e4
LT		 4333
4334/*
4335 * ---------------------------------------------------------------------
4336 * cy_init() and friends
4337 *
4338 * cy_init() is called at boot-time to initialize the serial driver.
4339 * ---------------------------------------------------------------------
4340 */
4341
dd025c0c 4342static int __devinit cy_init_card(struct cyclades_card *cinfo)
0809e267
JS		 4343{
4344 struct cyclades_port *info;
a6343afb 4345 u32 uninitialized_var(mailbox);
65f76a82 4346 unsigned int nports, port;
0809e267 4347 unsigned short chip_number;
65f76a82 4348 int uninitialized_var(index);
0809e267 4349
3046d50e
JS		 4350 spin_lock_init(&cinfo->card_lock);
4351
c2ad4c75 4352 if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
0809e267
JS		 4353 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4354 cinfo->ctl_addr)->mail_box_0);
4355 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4356 cinfo->intr_enabled = 0;
4357 cinfo->nports = 0; /* Will be correctly set later, after
4358 Z FW is loaded */
3046d50e
JS		 4359 } else {
4360 index = cinfo->bus_index;
4361 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4362 }
4363
dd025c0c
JS		 4364 cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
4365 if (cinfo->ports == NULL) {
4366 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
3137553d 4367 cinfo->nports = 0;
dd025c0c
JS		 4368 return -ENOMEM;
4369 }
4370
3046d50e
JS		 4371 for (port = cinfo->first_line; port < cinfo->first_line + nports;
4372 port++) {
dd025c0c 4373 info = &cinfo->ports[port - cinfo->first_line];
3046d50e 4374 info->magic = CYCLADES_MAGIC;
875b206b 4375 info->card = cinfo;
3046d50e
JS		 4376 info->line = port;
4377 info->flags = STD_COM_FLAGS;
4378 info->closing_wait = CLOSING_WAIT_DELAY;
4379 info->close_delay = 5 * HZ / 10;
4380
3046d50e
JS		 4381 init_waitqueue_head(&info->open_wait);
4382 init_waitqueue_head(&info->close_wait);
2c7fea99 4383 init_completion(&info->shutdown_wait);
3046d50e
JS		 4384 init_waitqueue_head(&info->delta_msr_wait);
4385
4386 if (IS_CYC_Z(*cinfo)) {
0809e267 4387 info->type = PORT_STARTECH;
0809e267
JS		 4388 if (mailbox == ZO_V1)
4389 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4390 else
3046d50e 4391 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
0809e267 4392#ifdef CONFIG_CYZ_INTR
3991428d
JS		 4393 setup_timer(&cyz_rx_full_timer[port],
4394 cyz_rx_restart, (unsigned long)info);
0809e267 4395#endif
3046d50e 4396 } else {
0809e267 4397 info->type = PORT_CIRRUS;
0809e267 4398 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
3046d50e 4399 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
0809e267
JS		 4400 info->cor2 = CyETC;
4401 info->cor3 = 0x08; /* _very_ small rcv threshold */
3046d50e 4402
0809e267 4403 chip_number = (port - cinfo->first_line) / 4;
15ed6cc0
AC		 4404 info->chip_rev = readb(cinfo->base_addr +
4405 (cy_chip_offset[chip_number] << index) +
4406 (CyGFRCR << index));
4407
4408 if (info->chip_rev >= CD1400_REV_J) {
0809e267
JS		 4409 /* It is a CD1400 rev. J or later */
4410 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4411 info->tco = baud_co_60[13]; /* Tx CO */
4412 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4413 info->rco = baud_co_60[13]; /* Rx CO */
0809e267
JS		 4414 info->rtsdtr_inv = 1;
4415 } else {
4416 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4417 info->tco = baud_co_25[13]; /* Tx CO */
4418 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4419 info->rco = baud_co_25[13]; /* Rx CO */
0809e267
JS		 4420 info->rtsdtr_inv = 0;
4421 }
3046d50e
JS		 4422 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4423 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
0809e267 4424 }
3046d50e 4425
0809e267 4426 }
3046d50e
JS		 4427
4428#ifndef CONFIG_CYZ_INTR
4429 if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4430 mod_timer(&cyz_timerlist, jiffies + 1);
4431#ifdef CY_PCI_DEBUG
4432 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4433#endif
4434 }
4435#endif
dd025c0c 4436 return 0;
0809e267
JS		 4437}
4438
1da177e4
LT		 4439/* initialize chips on Cyclom-Y card -- return number of valid
4440 chips (which is number of ports/4) */
31b4f0a1
JS		 4441static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4442 int index)
1da177e4 4443{
02f1175c
JS		 4444 unsigned int chip_number;
4445 void __iomem *base_addr;
4446
4447 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4448 /* Cy_HwReset is 0x1400 */
4449 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4450 /* Cy_ClrIntr is 0x1800 */
4451 udelay(500L);
4452
15ed6cc0
AC		 4453 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
4454 chip_number++) {
02f1175c
JS		 4455 base_addr =
4456 true_base_addr + (cy_chip_offset[chip_number] << index);
4457 mdelay(1);
db05c3b1 4458 if (readb(base_addr + (CyCCR << index)) != 0x00) {
02f1175c
JS		 4459 /*************
4460 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4461 chip_number, (unsigned long)base_addr);
4462 *************/
4463 return chip_number;
4464 }
4465
4466 cy_writeb(base_addr + (CyGFRCR << index), 0);
4467 udelay(10L);
4468
4469 /* The Cyclom-16Y does not decode address bit 9 and therefore
4470 cannot distinguish between references to chip 0 and a non-
4471 existent chip 4. If the preceding clearing of the supposed
4472 chip 4 GFRCR register appears at chip 0, there is no chip 4
4473 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4474 */
db05c3b1 4475 if (chip_number == 4 && readb(true_base_addr +
02f1175c
JS		 4476 (cy_chip_offset[0] << index) +
4477 (CyGFRCR << index)) == 0) {
4478 return chip_number;
4479 }
4480
4481 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4482 mdelay(1);
4483
db05c3b1 4484 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
02f1175c
JS		 4485 /*
4486 printk(" chip #%d at %#6lx is not responding ",
4487 chip_number, (unsigned long)base_addr);
4488 printk("(GFRCR stayed 0)\n",
4489 */
4490 return chip_number;
4491 }
db05c3b1 4492 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
02f1175c
JS		 4493 0x40) {
4494 /*
4495 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4496 "%#2x)\n",
4497 chip_number, (unsigned long)base_addr,
4498 base_addr[CyGFRCR<<index]);
4499 */
4500 return chip_number;
4501 }
4502 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
db05c3b1 4503 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
02f1175c
JS		 4504 /* It is a CD1400 rev. J or later */
4505 /* Impossible to reach 5ms with this chip.
4506 Changed to 2ms instead (f = 500 Hz). */
4507 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4508 } else {
4509 /* f = 200 Hz */
4510 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4511 }
1da177e4 4512
02f1175c
JS		 4513 /*
4514 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4515 chip_number, (unsigned long)base_addr,
db05c3b1 4516 readb(base_addr+(CyGFRCR<<index)));
02f1175c
JS		 4517 */
4518 }
4519 return chip_number;
4520} /* cyy_init_card */
1da177e4
LT		 4521
4522/*
4523 * ---------------------------------------------------------------------
4524 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4525 * sets global variables and return the number of ISA boards found.
4526 * ---------------------------------------------------------------------
4527 */
02f1175c 4528static int __init cy_detect_isa(void)
1da177e4
LT		 4529{
4530#ifdef CONFIG_ISA
02f1175c
JS		 4531 unsigned short cy_isa_irq, nboard;
4532 void __iomem *cy_isa_address;
4533 unsigned short i, j, cy_isa_nchan;
1da177e4 4534#ifdef MODULE
02f1175c 4535 int isparam = 0;
1da177e4
LT		 4536#endif
4537
02f1175c 4538 nboard = 0;
1da177e4
LT		 4539
4540#ifdef MODULE
4541 /* Check for module parameters */
02f1175c
JS		 4542 for (i = 0; i < NR_CARDS; i++) {
4543 if (maddr[i] || i) {
4544 isparam = 1;
4545 cy_isa_addresses[i] = maddr[i];
4546 }
4547 if (!maddr[i])
4548 break;
1da177e4
LT		 4549 }
4550#endif
4551
02f1175c
JS		 4552 /* scan the address table probing for Cyclom-Y/ISA boards */
4553 for (i = 0; i < NR_ISA_ADDRS; i++) {
4554 unsigned int isa_address = cy_isa_addresses[i];
15ed6cc0 4555 if (isa_address == 0x0000)
096dcfce 4556 return nboard;
1da177e4 4557
02f1175c 4558 /* probe for CD1400... */
cd989b3a 4559 cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
3137553d
JS		 4560 if (cy_isa_address == NULL) {
4561 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4562 "address\n");
4563 continue;
4564 }
02f1175c
JS		 4565 cy_isa_nchan = CyPORTS_PER_CHIP *
4566 cyy_init_card(cy_isa_address, 0);
4567 if (cy_isa_nchan == 0) {
3137553d 4568 iounmap(cy_isa_address);
02f1175c
JS		 4569 continue;
4570 }
1da177e4
LT		 4571#ifdef MODULE
4572 if (isparam && irq[i])
02f1175c 4573 cy_isa_irq = irq[i];
1da177e4
LT		 4574 else
4575#endif
02f1175c
JS		 4576 /* find out the board's irq by probing */
4577 cy_isa_irq = detect_isa_irq(cy_isa_address);
4578 if (cy_isa_irq == 0) {
21719191
JS		 4579 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4580 "IRQ could not be detected.\n",
02f1175c 4581 (unsigned long)cy_isa_address);
3137553d 4582 iounmap(cy_isa_address);
02f1175c
JS		 4583 continue;
4584 }
4585
4586 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
21719191
JS		 4587 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4588 "more channels are available. Change NR_PORTS "
4589 "in cyclades.c and recompile kernel.\n",
02f1175c 4590 (unsigned long)cy_isa_address);
3137553d 4591 iounmap(cy_isa_address);
096dcfce 4592 return nboard;
02f1175c
JS		 4593 }
4594 /* fill the next cy_card structure available */
4595 for (j = 0; j < NR_CARDS; j++) {
f7429034 4596 if (cy_card[j].base_addr == NULL)
02f1175c
JS		 4597 break;
4598 }
4599 if (j == NR_CARDS) { /* no more cy_cards available */
21719191
JS		 4600 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4601 "more cards can be used. Change NR_CARDS in "
4602 "cyclades.c and recompile kernel.\n",
02f1175c 4603 (unsigned long)cy_isa_address);
3137553d 4604 iounmap(cy_isa_address);
096dcfce 4605 return nboard;
02f1175c
JS		 4606 }
4607
4608 /* allocate IRQ */
4609 if (request_irq(cy_isa_irq, cyy_interrupt,
4610 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
21719191
JS		 4611 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4612 "could not allocate IRQ#%d.\n",
4613 (unsigned long)cy_isa_address, cy_isa_irq);
3137553d 4614 iounmap(cy_isa_address);
096dcfce 4615 return nboard;
02f1175c
JS		 4616 }
4617
4618 /* set cy_card */
4619 cy_card[j].base_addr = cy_isa_address;
4620 cy_card[j].ctl_addr = NULL;
4621 cy_card[j].irq = (int)cy_isa_irq;
4622 cy_card[j].bus_index = 0;
4623 cy_card[j].first_line = cy_next_channel;
4624 cy_card[j].num_chips = cy_isa_nchan / 4;
3137553d
JS		 4625 if (cy_init_card(&cy_card[j])) {
4626 cy_card[j].base_addr = NULL;
4627 free_irq(cy_isa_irq, &cy_card[j]);
4628 iounmap(cy_isa_address);
4629 continue;
4630 }
02f1175c
JS		 4631 nboard++;
4632
21719191
JS		 4633 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4634 "%d channels starting from port %d\n",
02f1175c
JS		 4635 j + 1, (unsigned long)cy_isa_address,
4636 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
21719191
JS		 4637 cy_isa_irq, cy_isa_nchan, cy_next_channel);
4638
6ad1ccc1
JS		 4639 for (j = cy_next_channel;
4640 j < cy_next_channel + cy_isa_nchan; j++)
4641 tty_register_device(cy_serial_driver, j, NULL);
02f1175c
JS		 4642 cy_next_channel += cy_isa_nchan;
4643 }
096dcfce 4644 return nboard;
1da177e4 4645#else
096dcfce 4646 return 0;
02f1175c
JS		 4647#endif /* CONFIG_ISA */
4648} /* cy_detect_isa */
1da177e4 4649
58936d8d 4650#ifdef CONFIG_PCI
054f5b0a
JS		 4651static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4652{
4653 unsigned int a;
4654
4655 for (a = 0; a < size && *str; a++, str++)
4656 if (*str & 0x80)
4657 return -EINVAL;
4658
4659 for (; a < size; a++, str++)
4660 if (*str)
4661 return -EINVAL;
4662
4663 return 0;
4664}
4665
4666static inline void __devinit cyz_fpga_copy(void __iomem *fpga, u8 *data,
4667 unsigned int size)
4668{
4669 for (; size > 0; size--) {
4670 cy_writel(fpga, *data++);
4671 udelay(10);
4672 }
4673}
4674
4675static void __devinit plx_init(struct pci_dev *pdev, int irq,
4676 struct RUNTIME_9060 __iomem *addr)
1da177e4 4677{
02f1175c 4678 /* Reset PLX */
054f5b0a 4679 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
02f1175c 4680 udelay(100L);
054f5b0a 4681 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
02f1175c
JS		 4682
4683 /* Reload Config. Registers from EEPROM */
054f5b0a 4684 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
02f1175c 4685 udelay(100L);
054f5b0a
JS		 4686 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4687
4688 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4689 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4690 * registers. This will remain here until we find a permanent fix.
4691 */
4692 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4693}
4694
4695static int __devinit __cyz_load_fw(const struct firmware *fw,
4696 const char *name, const u32 mailbox, void __iomem *base,
4697 void __iomem *fpga)
4698{
4699 void *ptr = fw->data;
4700 struct zfile_header *h = ptr;
4701 struct zfile_config *c, *cs;
4702 struct zfile_block *b, *bs;
4703 unsigned int a, tmp, len = fw->size;
4704#define BAD_FW KERN_ERR "Bad firmware: "
4705 if (len < sizeof(*h)) {
4706 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4707 return -EINVAL;
4708 }
4709
4710 cs = ptr + h->config_offset;
4711 bs = ptr + h->block_offset;
4712
4713 if ((void *)(cs + h->n_config) > ptr + len ||
4714 (void *)(bs + h->n_blocks) > ptr + len) {
4715 printk(BAD_FW "too short");
4716 return -EINVAL;
4717 }
4718
4719 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4720 cyc_isfwstr(h->date, sizeof(h->date))) {
4721 printk(BAD_FW "bad formatted header string\n");
4722 return -EINVAL;
4723 }
4724
4725 if (strncmp(name, h->name, sizeof(h->name))) {
4726 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4727 return -EINVAL;
4728 }
4729
4730 tmp = 0;
4731 for (c = cs; c < cs + h->n_config; c++) {
4732 for (a = 0; a < c->n_blocks; a++)
4733 if (c->block_list[a] > h->n_blocks) {
4734 printk(BAD_FW "bad block ref number in cfgs\n");
4735 return -EINVAL;
4736 }
4737 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4738 tmp++;
4739 }
4740 if (!tmp) {
4741 printk(BAD_FW "nothing appropriate\n");
4742 return -EINVAL;
4743 }
4744
4745 for (b = bs; b < bs + h->n_blocks; b++)
4746 if (b->file_offset + b->size > len) {
4747 printk(BAD_FW "bad block data offset\n");
4748 return -EINVAL;
4749 }
4750
4751 /* everything is OK, let's seek'n'load it */
4752 for (c = cs; c < cs + h->n_config; c++)
4753 if (c->mailbox == mailbox && c->function == 0)
4754 break;
4755
4756 for (a = 0; a < c->n_blocks; a++) {
4757 b = &bs[c->block_list[a]];
4758 if (b->type == ZBLOCK_FPGA) {
4759 if (fpga != NULL)
4760 cyz_fpga_copy(fpga, ptr + b->file_offset,
4761 b->size);
4762 } else {
4763 if (base != NULL)
4764 memcpy_toio(base + b->ram_offset,
4765 ptr + b->file_offset, b->size);
4766 }
4767 }
4768#undef BAD_FW
4769 return 0;
4770}
4771
4772static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4773 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4774{
4775 const struct firmware *fw;
4776 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4777 struct CUSTOM_REG __iomem *cust = base_addr;
4778 struct ZFW_CTRL __iomem *pt_zfwctrl;
c4923b4f 4779 void __iomem *tmp;
054f5b0a
JS		 4780 u32 mailbox, status;
4781 unsigned int i;
4782 int retval;
4783
4784 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4785 if (retval) {
4786 dev_err(&pdev->dev, "can't get firmware\n");
4787 goto err;
4788 }
4789
4790 /* Check whether the firmware is already loaded and running. If
4791 positive, skip this board */
4792 if (Z_FPGA_LOADED(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
4793 u32 cntval = readl(base_addr + 0x190);
4794
4795 udelay(100);
4796 if (cntval != readl(base_addr + 0x190)) {
4797 /* FW counter is working, FW is running */
4798 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4799 "Skipping board.\n");
4800 retval = 0;
4801 goto err_rel;
4802 }
4803 }
4804
4805 /* start boot */
4806 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4807 ~0x00030800UL);
4808
4809 mailbox = readl(&ctl_addr->mail_box_0);
4810
4811 if (mailbox == 0 || Z_FPGA_LOADED(ctl_addr)) {
4812 /* stops CPU and set window to beginning of RAM */
4813 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4814 cy_writel(&cust->cpu_stop, 0);
4815 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4816 udelay(100);
4817 }
4818
4819 plx_init(pdev, irq, ctl_addr);
4820
4821 if (mailbox != 0) {
4822 /* load FPGA */
4823 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4824 base_addr);
4825 if (retval)
4826 goto err_rel;
4827 if (!Z_FPGA_LOADED(ctl_addr)) {
4828 dev_err(&pdev->dev, "fw upload successful, but fw is "
4829 "not loaded\n");
4830 goto err_rel;
4831 }
4832 }
4833
4834 /* stops CPU and set window to beginning of RAM */
4835 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4836 cy_writel(&cust->cpu_stop, 0);
4837 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4838 udelay(100);
4839
4840 /* clear memory */
c4923b4f 4841 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
054f5b0a
JS		 4842 cy_writeb(tmp, 255);
4843 if (mailbox != 0) {
4844 /* set window to last 512K of RAM */
4845 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
c4923b4f 4846 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
054f5b0a
JS		 4847 cy_writeb(tmp, 255);
4848 /* set window to beginning of RAM */
4849 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
054f5b0a
JS		 4850 }
4851
4852 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4853 release_firmware(fw);
4854 if (retval)
4855 goto err;
4856
4857 /* finish boot and start boards */
4858 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4859 cy_writel(&cust->cpu_start, 0);
4860 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4861 i = 0;
4862 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4863 msleep(100);
4864 if (status != ZFIRM_ID) {
4865 if (status == ZFIRM_HLT) {
4866 dev_err(&pdev->dev, "you need an external power supply "
4867 "for this number of ports. Firmware halted and "
4868 "board reset.\n");
4869 retval = -EIO;
4870 goto err;
4871 }
4872 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4873 "some more time\n", status);
4874 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
4875 i++ < 200)
4876 msleep(100);
4877 if (status != ZFIRM_ID) {
4878 dev_err(&pdev->dev, "Board not started in 20 seconds! "
4879 "Giving up. (fid->signature = 0x%x)\n",
4880 status);
4881 dev_info(&pdev->dev, "*** Warning ***: if you are "
4882 "upgrading the FW, please power cycle the "
4883 "system before loading the new FW to the "
4884 "Cyclades-Z.\n");
4885
4886 if (Z_FPGA_LOADED(ctl_addr))
4887 plx_init(pdev, irq, ctl_addr);
4888
4889 retval = -EIO;
4890 goto err;
4891 }
4892 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
4893 i / 10);
4894 }
4895 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
4896
4897 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
4898 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
4899 base_addr + readl(&fid->zfwctrl_addr));
4900
4901 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
4902 readl(&pt_zfwctrl->board_ctrl.fw_version),
4903 readl(&pt_zfwctrl->board_ctrl.n_channel));
4904
4905 if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) {
4906 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
4907 "check the connection between the Z host card and the "
4908 "serial expanders.\n");
4909
4910 if (Z_FPGA_LOADED(ctl_addr))
4911 plx_init(pdev, irq, ctl_addr);
4912
4913 dev_info(&pdev->dev, "Null number of ports detected. Board "
4914 "reset.\n");
4915 retval = 0;
4916 goto err;
4917 }
4918
4919 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
4920 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
4921
4922 /*
4923 Early firmware failed to start looking for commands.
4924 This enables firmware interrupts for those commands.
4925 */
4926 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4927 (1 << 17));
4928 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4929 0x00030800UL);
4930
4931 plx_init(pdev, irq, ctl_addr);
4932
4933 return 0;
4934err_rel:
4935 release_firmware(fw);
4936err:
4937 return retval;
1da177e4
LT		 4938}
4939
58936d8d
JS		 4940static int __devinit cy_pci_probe(struct pci_dev *pdev,
4941 const struct pci_device_id *ent)
1da177e4 4942{
3137553d
JS		 4943 void __iomem *addr0 = NULL, *addr2 = NULL;
4944 char *card_name = NULL;
4945 u32 mailbox;
4946 unsigned int device_id, nchan = 0, card_no, i;
4947 unsigned char plx_ver;
4948 int retval, irq;
02f1175c 4949
58936d8d
JS		 4950 retval = pci_enable_device(pdev);
4951 if (retval) {
4952 dev_err(&pdev->dev, "cannot enable device\n");
3137553d 4953 goto err;
58936d8d 4954 }
1da177e4 4955
58936d8d 4956 /* read PCI configuration area */
3137553d 4957 irq = pdev->irq;
58936d8d 4958 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
1da177e4 4959
3137553d
JS		 4960#if defined(__alpha__)
4961 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4962 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
4963 "addresses on Alpha systems.\n");
4964 retval = -EIO;
4965 goto err_dis;
4966 }
4967#endif
4968 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4969 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
4970 "addresses\n");
4971 retval = -EIO;
4972 goto err_dis;
4973 }
4974
4975 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4976 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
4977 "it...\n");
4978 pdev->resource[2].flags &= ~IORESOURCE_IO;
4979 }
4980
4981 retval = pci_request_regions(pdev, "cyclades");
4982 if (retval) {
4983 dev_err(&pdev->dev, "failed to reserve resources\n");
4984 goto err_dis;
4985 }
4986
4987 retval = -EIO;
58936d8d
JS		 4988 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4989 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3137553d 4990 card_name = "Cyclom-Y";
1da177e4 4991
3137553d
JS		 4992 addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
4993 if (addr0 == NULL) {
4994 dev_err(&pdev->dev, "can't remap ctl region\n");
4995 goto err_reg;
58936d8d 4996 }
3137553d
JS		 4997 addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
4998 if (addr2 == NULL) {
4999 dev_err(&pdev->dev, "can't remap base region\n");
5000 goto err_unmap;
58936d8d 5001 }
1da177e4 5002
3137553d
JS		 5003 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
5004 if (nchan == 0) {
21719191
JS		 5005 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
5006 "Serial-Modules\n");
58936d8d
JS		 5007 return -EIO;
5008 }
58936d8d 5009 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
3137553d 5010 struct RUNTIME_9060 __iomem *ctl_addr;
21719191 5011
3137553d
JS		 5012 ctl_addr = addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
5013 if (addr0 == NULL) {
5014 dev_err(&pdev->dev, "can't remap ctl region\n");
5015 goto err_reg;
5016 }
58936d8d
JS		 5017
5018 /* Disable interrupts on the PLX before resetting it */
054f5b0a 5019 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900);
58936d8d 5020
054f5b0a 5021 plx_init(pdev, irq, addr0);
02f1175c 5022
3137553d 5023 mailbox = (u32)readl(&ctl_addr->mail_box_0);
58936d8d 5024
3137553d
JS		 5025 addr2 = pci_iomap(pdev, 2, mailbox == ZE_V1 ?
5026 CyPCI_Ze_win : CyPCI_Zwin);
5027 if (addr2 == NULL) {
5028 dev_err(&pdev->dev, "can't remap base region\n");
5029 goto err_unmap;
58936d8d
JS		 5030 }
5031
5032 if (mailbox == ZE_V1) {
3137553d
JS		 5033 card_name = "Cyclades-Ze";
5034
5035 readl(&ctl_addr->mail_box_0);
5036 nchan = ZE_V1_NPORTS;
58936d8d 5037 } else {
3137553d 5038 card_name = "Cyclades-8Zo";
1da177e4
LT		 5039
5040#ifdef CY_PCI_DEBUG
3137553d
JS		 5041 if (mailbox == ZO_V1) {
5042 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5043 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5044 "id %lx, ver %lx\n", (ulong)(0xff &
5045 readl(&((struct CUSTOM_REG *)addr2)->
5046 fpga_id)), (ulong)(0xff &
5047 readl(&((struct CUSTOM_REG *)addr2)->
5048 fpga_version)));
5049 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5050 } else {
5051 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5052 "Cyclades-Z board. FPGA not loaded\n");
5053 }
1da177e4 5054#endif
3137553d
JS		 5055 /* The following clears the firmware id word. This
5056 ensures that the driver will not attempt to talk to
5057 the board until it has been properly initialized.
5058 */
5059 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5060 cy_writel(addr2 + ID_ADDRESS, 0L);
1da177e4 5061
054f5b0a
JS		 5062 retval = cyz_load_fw(pdev, addr2, addr0, irq);
5063 if (retval)
5064 goto err_unmap;
3137553d
JS		 5065 /* This must be a Cyclades-8Zo/PCI. The extendable
5066 version will have a different device_id and will
5067 be allocated its maximum number of ports. */
5068 nchan = 8;
58936d8d 5069 }
3137553d
JS		 5070 }
5071
5072 if ((cy_next_channel + nchan) > NR_PORTS) {
5073 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5074 "channels are available. Change NR_PORTS in "
5075 "cyclades.c and recompile kernel.\n");
5076 goto err_unmap;
5077 }
5078 /* fill the next cy_card structure available */
5079 for (card_no = 0; card_no < NR_CARDS; card_no++) {
5080 if (cy_card[card_no].base_addr == NULL)
5081 break;
5082 }
5083 if (card_no == NR_CARDS) { /* no more cy_cards available */
5084 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5085 "more cards can be used. Change NR_CARDS in "
5086 "cyclades.c and recompile kernel.\n");
5087 goto err_unmap;
5088 }
5089
5090 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5091 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5092 /* allocate IRQ */
5093 retval = request_irq(irq, cyy_interrupt,
5094 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5095 if (retval) {
5096 dev_err(&pdev->dev, "could not allocate IRQ\n");
5097 goto err_unmap;
58936d8d 5098 }
3137553d
JS		 5099 cy_card[card_no].num_chips = nchan / 4;
5100 } else {
02f1175c 5101#ifdef CONFIG_CYZ_INTR
58936d8d 5102 /* allocate IRQ only if board has an IRQ */
3137553d
JS		 5103 if (irq != 0 && irq != 255) {
5104 retval = request_irq(irq, cyz_interrupt,
58936d8d 5105 IRQF_SHARED, "Cyclades-Z",
3137553d 5106 &cy_card[card_no]);
58936d8d 5107 if (retval) {
21719191 5108 dev_err(&pdev->dev, "could not allocate IRQ\n");
3137553d 5109 goto err_unmap;
02f1175c 5110 }
58936d8d 5111 }
02f1175c 5112#endif /* CONFIG_CYZ_INTR */
65f76a82 5113 cy_card[card_no].num_chips = (unsigned int)-1;
3137553d 5114 }
02f1175c 5115
3137553d
JS		 5116 /* set cy_card */
5117 cy_card[card_no].base_addr = addr2;
5118 cy_card[card_no].ctl_addr = addr0;
5119 cy_card[card_no].irq = irq;
5120 cy_card[card_no].bus_index = 1;
5121 cy_card[card_no].first_line = cy_next_channel;
5122 retval = cy_init_card(&cy_card[card_no]);
5123 if (retval)
5124 goto err_null;
58936d8d 5125
3137553d 5126 pci_set_drvdata(pdev, &cy_card[card_no]);
58936d8d 5127
3137553d
JS		 5128 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5129 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5130 /* enable interrupts in the PCI interface */
5131 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
5132 switch (plx_ver) {
5133 case PLX_9050:
5134
5135 cy_writeb(addr0 + 0x4c, 0x43);
5136 break;
5137
5138 case PLX_9060:
5139 case PLX_9080:
5140 default: /* Old boards, use PLX_9060 */
054f5b0a 5141 plx_init(pdev, irq, addr0);
3137553d
JS		 5142 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900);
5143 break;
5144 }
58936d8d
JS		 5145 }
5146
3137553d
JS		 5147 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5148 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5149 for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5150 tty_register_device(cy_serial_driver, i, &pdev->dev);
5151 cy_next_channel += nchan;
5152
58936d8d 5153 return 0;
3137553d
JS		 5154err_null:
5155 cy_card[card_no].base_addr = NULL;
5156 free_irq(irq, &cy_card[card_no]);
5157err_unmap:
5158 pci_iounmap(pdev, addr0);
5159 if (addr2)
5160 pci_iounmap(pdev, addr2);
5161err_reg:
5162 pci_release_regions(pdev);
5163err_dis:
5164 pci_disable_device(pdev);
5165err:
5166 return retval;
58936d8d 5167}
58936d8d 5168
6747cd93 5169static void __devexit cy_pci_remove(struct pci_dev *pdev)
58936d8d 5170{
38d09093 5171 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
f3851e73 5172 unsigned int i;
38d09093 5173
85c93fa9 5174 /* non-Z with old PLX */
c2ad4c75
JS		 5175 if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5176 PLX_9050)
85c93fa9
JS		 5177 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5178 else
5179#ifndef CONFIG_CYZ_INTR
c2ad4c75 5180 if (!IS_CYC_Z(*cinfo))
85c93fa9
JS		 5181#endif
5182 cy_writew(cinfo->ctl_addr + 0x68,
5183 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5184
38d09093
JS		 5185 pci_iounmap(pdev, cinfo->base_addr);
5186 if (cinfo->ctl_addr)
5187 pci_iounmap(pdev, cinfo->ctl_addr);
5188 if (cinfo->irq
5189#ifndef CONFIG_CYZ_INTR
c2ad4c75 5190 && !IS_CYC_Z(*cinfo)
38d09093
JS		 5191#endif /* CONFIG_CYZ_INTR */
5192 )
5193 free_irq(cinfo->irq, cinfo);
5194 pci_release_regions(pdev);
5195
5196 cinfo->base_addr = NULL;
6ad1ccc1
JS		 5197 for (i = cinfo->first_line; i < cinfo->first_line +
5198 cinfo->nports; i++)
5199 tty_unregister_device(cy_serial_driver, i);
dd025c0c
JS		 5200 cinfo->nports = 0;
5201 kfree(cinfo->ports);
38d09093
JS		 5202}
5203
6747cd93
JS		 5204static struct pci_driver cy_pci_driver = {
5205 .name = "cyclades",
5206 .id_table = cy_pci_dev_id,
5207 .probe = cy_pci_probe,
5208 .remove = __devexit_p(cy_pci_remove)
5209};
5210#endif
5211
02f1175c 5212static int
1da177e4 5213cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
02f1175c 5214 int *eof, void *data)
1da177e4 5215{
02f1175c 5216 struct cyclades_port *info;
dd025c0c 5217 unsigned int i, j;
02f1175c
JS		 5218 int len = 0;
5219 off_t begin = 0;
5220 off_t pos = 0;
5221 int size;
5222 __u32 cur_jifs = jiffies;
5223
5224 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5225 "IdleIn Overruns Ldisc\n");
5226
5227 pos += size;
1da177e4 5228 len += size;
1da177e4 5229
02f1175c 5230 /* Output one line for each known port */
dd025c0c
JS		 5231 for (i = 0; i < NR_CARDS; i++)
5232 for (j = 0; j < cy_card[i].nports; j++) {
5233 info = &cy_card[i].ports[j];
5234
5235 if (info->count)
5236 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5237 "%10lu %8lu %9lu %6ld\n", info->line,
5238 (cur_jifs - info->idle_stats.in_use) /
5239 HZ, info->idle_stats.xmit_bytes,
5240 (cur_jifs - info->idle_stats.xmit_idle)/
5241 HZ, info->idle_stats.recv_bytes,
5242 (cur_jifs - info->idle_stats.recv_idle)/
5243 HZ, info->idle_stats.overruns,
5244 (long)info->tty->ldisc.num);
5245 else
5246 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5247 "%10lu %8lu %9lu %6ld\n",
5248 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5249 len += size;
5250 pos = begin + len;
5251
5252 if (pos < offset) {
5253 len = 0;
5254 begin = pos;
5255 }
5256 if (pos > offset + length)
5257 goto done;
02f1175c 5258 }
02f1175c 5259 *eof = 1;
1da177e4 5260done:
02f1175c
JS		 5261 *start = buf + (offset - begin); /* Start of wanted data */
5262 len -= (offset - begin); /* Start slop */
5263 if (len > length)
5264 len = length; /* Ending slop */
5265 if (len < 0)
5266 len = 0;
5267 return len;
1da177e4
LT		 5268}
5269
5270/* The serial driver boot-time initialization code!
5271 Hardware I/O ports are mapped to character special devices on a
5272 first found, first allocated manner. That is, this code searches
5273 for Cyclom cards in the system. As each is found, it is probed
5274 to discover how many chips (and thus how many ports) are present.
5275 These ports are mapped to the tty ports 32 and upward in monotonic
5276 fashion. If an 8-port card is replaced with a 16-port card, the
5277 port mapping on a following card will shift.
5278
5279 This approach is different from what is used in the other serial
5280 device driver because the Cyclom is more properly a multiplexer,
5281 not just an aggregation of serial ports on one card.
5282
5283 If there are more cards with more ports than have been
5284 statically allocated above, a warning is printed and the
5285 extra ports are ignored.
5286 */
5287
b68e31d0 5288static const struct tty_operations cy_ops = {
02f1175c
JS		 5289 .open = cy_open,
5290 .close = cy_close,
5291 .write = cy_write,
5292 .put_char = cy_put_char,
5293 .flush_chars = cy_flush_chars,
5294 .write_room = cy_write_room,
5295 .chars_in_buffer = cy_chars_in_buffer,
5296 .flush_buffer = cy_flush_buffer,
5297 .ioctl = cy_ioctl,
5298 .throttle = cy_throttle,
5299 .unthrottle = cy_unthrottle,
5300 .set_termios = cy_set_termios,
5301 .stop = cy_stop,
5302 .start = cy_start,
5303 .hangup = cy_hangup,
5304 .break_ctl = cy_break,
5305 .wait_until_sent = cy_wait_until_sent,
5306 .read_proc = cyclades_get_proc_info,
5307 .tiocmget = cy_tiocmget,
5308 .tiocmset = cy_tiocmset,
1da177e4
LT		 5309};
5310
02f1175c 5311static int __init cy_init(void)
1da177e4 5312{
dd025c0c 5313 unsigned int nboards;
9dacf3b2 5314 int retval = -ENOMEM;
02f1175c
JS		 5315
5316 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5317 if (!cy_serial_driver)
9dacf3b2 5318 goto err;
21719191
JS		 5319
5320 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5321 __DATE__, __TIME__);
02f1175c
JS		 5322
5323 /* Initialize the tty_driver structure */
5324
5325 cy_serial_driver->owner = THIS_MODULE;
5326 cy_serial_driver->driver_name = "cyclades";
5327 cy_serial_driver->name = "ttyC";
5328 cy_serial_driver->major = CYCLADES_MAJOR;
5329 cy_serial_driver->minor_start = 0;
5330 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5331 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5332 cy_serial_driver->init_termios = tty_std_termios;
5333 cy_serial_driver->init_termios.c_cflag =
5334 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
6ad1ccc1 5335 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
02f1175c
JS		 5336 tty_set_operations(cy_serial_driver, &cy_ops);
5337
9dacf3b2
JS		 5338 retval = tty_register_driver(cy_serial_driver);
5339 if (retval) {
5340 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5341 goto err_frtty;
5342 }
02f1175c 5343
02f1175c
JS		 5344 /* the code below is responsible to find the boards. Each different
5345 type of board has its own detection routine. If a board is found,
5346 the next cy_card structure available is set by the detection
5347 routine. These functions are responsible for checking the
5348 availability of cy_card and cy_port data structures and updating
5349 the cy_next_channel. */
5350
5351 /* look for isa boards */
14a55a67 5352 nboards = cy_detect_isa();
02f1175c 5353
6747cd93 5354#ifdef CONFIG_PCI
02f1175c 5355 /* look for pci boards */
6747cd93 5356 retval = pci_register_driver(&cy_pci_driver);
d941ea7d
JJ		 5357 if (retval && !nboards) {
5358 tty_unregister_driver(cy_serial_driver);
5359 goto err_frtty;
5360 }
6747cd93 5361#endif
9dacf3b2
JS		 5362
5363 return 0;
9dacf3b2
JS		 5364err_frtty:
5365 put_tty_driver(cy_serial_driver);
5366err:
5367 return retval;
02f1175c 5368} /* cy_init */
1da177e4 5369
02f1175c 5370static void __exit cy_cleanup_module(void)
1da177e4 5371{
dd025c0c 5372 struct cyclades_card *card;
65f76a82 5373 unsigned int i, e1;
1da177e4
LT		 5374
5375#ifndef CONFIG_CYZ_INTR
b7050906 5376 del_timer_sync(&cyz_timerlist);
1da177e4
LT		 5377#endif /* CONFIG_CYZ_INTR */
5378
15ed6cc0
AC		 5379 e1 = tty_unregister_driver(cy_serial_driver);
5380 if (e1)
21719191
JS		 5381 printk(KERN_ERR "failed to unregister Cyclades serial "
5382 "driver(%d)\n", e1);
1da177e4 5383
6747cd93
JS		 5384#ifdef CONFIG_PCI
5385 pci_unregister_driver(&cy_pci_driver);
5386#endif
5387
02f1175c 5388 for (i = 0; i < NR_CARDS; i++) {
dd025c0c
JS		 5389 card = &cy_card[i];
5390 if (card->base_addr) {
85c93fa9 5391 /* clear interrupt */
dd025c0c
JS		 5392 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5393 iounmap(card->base_addr);
5394 if (card->ctl_addr)
5395 iounmap(card->ctl_addr);
5396 if (card->irq
1da177e4 5397#ifndef CONFIG_CYZ_INTR
dd025c0c 5398 && !IS_CYC_Z(*card)
1da177e4 5399#endif /* CONFIG_CYZ_INTR */
02f1175c 5400 )
dd025c0c 5401 free_irq(card->irq, card);
65f76a82 5402 for (e1 = card->first_line; e1 < card->first_line +
dd025c0c 5403 card->nports; e1++)
6ad1ccc1 5404 tty_unregister_device(cy_serial_driver, e1);
dd025c0c 5405 kfree(card->ports);
02f1175c
JS		 5406 }
5407 }
f2462bfe
JS		 5408
5409 put_tty_driver(cy_serial_driver);
1da177e4
LT		 5410} /* cy_cleanup_module */
5411
5412module_init(cy_init);
5413module_exit(cy_cleanup_module);
5414
5415MODULE_LICENSE("GPL");
c8e1693a 5416MODULE_VERSION(CY_VERSION);
Linux 6.x block layer and io_uring tree(s)