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[linux-2.6-block.git] / drivers / char / cyclades.c
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1da177e4
LT		 1#undef BLOCKMOVE
2#define Z_WAKE
3#undef Z_EXT_CHARS_IN_BUFFER
1da177e4
LT		 4
5/*
6 * linux/drivers/char/cyclades.c
7 *
8 * This file contains the driver for the Cyclades async multiport
9 * serial boards.
10 *
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
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 2524 orig_jiffies = jiffies;
978e595f 2525 lock_kernel();
02f1175c
JS		 2526 /*
2527 * Set the check interval to be 1/5 of the estimated time to
2528 * send a single character, and make it at least 1. The check
2529 * interval should also be less than the timeout.
2530 *
2531 * Note: we have to use pretty tight timings here to satisfy
2532 * the NIST-PCTS.
2533 */
2534 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2535 char_time = char_time / 5;
2536 if (char_time <= 0)
2537 char_time = 1;
2538 if (timeout < 0)
2539 timeout = 0;
2540 if (timeout)
2541 char_time = min(char_time, timeout);
2542 /*
2543 * If the transmitter hasn't cleared in twice the approximate
2544 * amount of time to send the entire FIFO, it probably won't
2545 * ever clear. This assumes the UART isn't doing flow
2546 * control, which is currently the case. Hence, if it ever
2547 * takes longer than info->timeout, this is probably due to a
2548 * UART bug of some kind. So, we clamp the timeout parameter at
2549 * 2*info->timeout.
2550 */
2551 if (!timeout || timeout > 2 * info->timeout)
2552 timeout = 2 * info->timeout;
1da177e4 2553#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191
JS		 2554 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2555 timeout, char_time, jiffies);
1da177e4 2556#endif
02f1175c 2557 card = info->card;
875b206b
JS		 2558 channel = (info->line) - (card->first_line);
2559 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 2560 chip = channel >> 2;
2561 channel &= 0x03;
875b206b
JS		 2562 index = card->bus_index;
2563 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
db05c3b1 2564 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
1da177e4 2565#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191 2566 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
1da177e4 2567#endif
02f1175c
JS		 2568 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2569 break;
2570 if (timeout && time_after(jiffies, orig_jiffies +
2571 timeout))
2572 break;
2573 }
1da177e4 2574 }
02f1175c
JS		 2575 /* Run one more char cycle */
2576 msleep_interruptible(jiffies_to_msecs(char_time * 5));
978e595f 2577 unlock_kernel();
1da177e4 2578#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191 2579 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
1da177e4
LT		 2580#endif
2581}
2582
978e595f
AC		 2583static void cy_flush_buffer(struct tty_struct *tty)
2584{
2585 struct cyclades_port *info = tty->driver_data;
2586 struct cyclades_card *card;
2587 int channel, retval;
2588 unsigned long flags;
2589
2590#ifdef CY_DEBUG_IO
2591 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
2592#endif
2593
2594 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
2595 return;
2596
2597 card = info->card;
2598 channel = info->line - card->first_line;
2599
2600 spin_lock_irqsave(&card->card_lock, flags);
2601 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2602 spin_unlock_irqrestore(&card->card_lock, flags);
2603
2604 if (IS_CYC_Z(*card)) { /* If it is a Z card, flush the on-board
2605 buffers as well */
2606 spin_lock_irqsave(&card->card_lock, flags);
2607 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
2608 if (retval != 0) {
2609 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
2610 "was %x\n", info->line, retval);
2611 }
2612 spin_unlock_irqrestore(&card->card_lock, flags);
2613 }
2614 tty_wakeup(tty);
2615} /* cy_flush_buffer */
2616
2617
1da177e4
LT		 2618/*
2619 * This routine is called when a particular tty device is closed.
2620 */
02f1175c 2621static void cy_close(struct tty_struct *tty, struct file *filp)
1da177e4 2622{
cab9bdd1 2623 struct cyclades_port *info = tty->driver_data;
9fa1b3b1 2624 struct cyclades_card *card;
02f1175c 2625 unsigned long flags;
1da177e4
LT		 2626
2627#ifdef CY_DEBUG_OTHER
21719191 2628 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
1da177e4
LT		 2629#endif
2630
15ed6cc0 2631 if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
02f1175c 2632 return;
1da177e4 2633
9fa1b3b1
JS		 2634 card = info->card;
2635
2636 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2637 /* If the TTY is being hung up, nothing to do */
2638 if (tty_hung_up_p(filp)) {
9fa1b3b1 2639 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2640 return;
2641 }
1da177e4 2642#ifdef CY_DEBUG_OPEN
21719191
JS		 2643 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2644 info->count);
1da177e4 2645#endif
02f1175c
JS		 2646 if ((tty->count == 1) && (info->count != 1)) {
2647 /*
2648 * Uh, oh. tty->count is 1, which means that the tty
2649 * structure will be freed. Info->count should always
2650 * be one in these conditions. If it's greater than
2651 * one, we've got real problems, since it means the
2652 * serial port won't be shutdown.
2653 */
21719191
JS		 2654 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2655 "tty->count is 1, info->count is %d\n", info->count);
02f1175c
JS		 2656 info->count = 1;
2657 }
1da177e4 2658#ifdef CY_DEBUG_COUNT
21719191 2659 printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
02f1175c 2660 current->pid, info->count - 1);
1da177e4 2661#endif
02f1175c 2662 if (--info->count < 0) {
1da177e4 2663#ifdef CY_DEBUG_COUNT
21719191 2664 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
1da177e4 2665#endif
02f1175c 2666 info->count = 0;
1da177e4 2667 }
02f1175c 2668 if (info->count) {
9fa1b3b1 2669 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2670 return;
2671 }
2672 info->flags |= ASYNC_CLOSING;
1da177e4 2673
02f1175c
JS		 2674 /*
2675 * Now we wait for the transmit buffer to clear; and we notify
2676 * the line discipline to only process XON/XOFF characters.
2677 */
2678 tty->closing = 1;
9fa1b3b1 2679 spin_unlock_irqrestore(&card->card_lock, flags);
15ed6cc0 2680 if (info->closing_wait != CY_CLOSING_WAIT_NONE)
02f1175c 2681 tty_wait_until_sent(tty, info->closing_wait);
15ed6cc0 2682
9fa1b3b1 2683 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 2684
9fa1b3b1
JS		 2685 if (!IS_CYC_Z(*card)) {
2686 int channel = info->line - card->first_line;
2687 int index = card->bus_index;
2688 void __iomem *base_addr = card->base_addr +
02f1175c
JS		 2689 (cy_chip_offset[channel >> 2] << index);
2690 /* Stop accepting input */
2691 channel &= 0x03;
2692 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2693 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2694 readb(base_addr + (CySRER << index)) & ~CyRxData);
02f1175c 2695 if (info->flags & ASYNC_INITIALIZED) {
15ed6cc0
AC		 2696 /* Waiting for on-board buffers to be empty before
2697 closing the port */
9fa1b3b1 2698 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2699 cy_wait_until_sent(tty, info->timeout);
9fa1b3b1 2700 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2701 }
2702 } else {
2703#ifdef Z_WAKE
15ed6cc0
AC		 2704 /* Waiting for on-board buffers to be empty before closing
2705 the port */
9fa1b3b1 2706 void __iomem *base_addr = card->base_addr;
02f1175c
JS		 2707 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2708 struct ZFW_CTRL __iomem *zfw_ctrl =
db05c3b1 2709 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 2710 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
9fa1b3b1 2711 int channel = info->line - card->first_line;
02f1175c
JS		 2712 int retval;
2713
db05c3b1 2714 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
9fa1b3b1 2715 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
02f1175c 2716 if (retval != 0) {
21719191
JS		 2717 printk(KERN_DEBUG "cyc:cy_close retval on "
2718 "ttyC%d was %x\n", info->line, retval);
02f1175c 2719 }
9fa1b3b1 2720 spin_unlock_irqrestore(&card->card_lock, flags);
2c7fea99 2721 wait_for_completion_interruptible(&info->shutdown_wait);
9fa1b3b1 2722 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 2723 }
1da177e4 2724#endif
02f1175c
JS		 2725 }
2726
9fa1b3b1 2727 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2728 shutdown(info);
978e595f 2729 cy_flush_buffer(tty);
02f1175c 2730 tty_ldisc_flush(tty);
9fa1b3b1 2731 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2732
2733 tty->closing = 0;
02f1175c
JS		 2734 info->tty = NULL;
2735 if (info->blocked_open) {
9fa1b3b1 2736 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2737 if (info->close_delay) {
2738 msleep_interruptible(jiffies_to_msecs
2739 (info->close_delay));
2740 }
2741 wake_up_interruptible(&info->open_wait);
9fa1b3b1 2742 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2743 }
2744 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2745 wake_up_interruptible(&info->close_wait);
1da177e4
LT		 2746
2747#ifdef CY_DEBUG_OTHER
21719191 2748 printk(KERN_DEBUG "cyc:cy_close done\n");
1da177e4
LT		 2749#endif
2750
9fa1b3b1 2751 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2752} /* cy_close */
1da177e4
LT		 2753
2754/* This routine gets called when tty_write has put something into
2755 * the write_queue. The characters may come from user space or
2756 * kernel space.
2757 *
2758 * This routine will return the number of characters actually
2759 * accepted for writing.
2760 *
2761 * If the port is not already transmitting stuff, start it off by
2762 * enabling interrupts. The interrupt service routine will then
2763 * ensure that the characters are sent.
2764 * If the port is already active, there is no need to kick it.
2765 *
2766 */
02f1175c 2767static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1da177e4 2768{
cab9bdd1 2769 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 2770 unsigned long flags;
2771 int c, ret = 0;
1da177e4
LT		 2772
2773#ifdef CY_DEBUG_IO
21719191 2774 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
1da177e4
LT		 2775#endif
2776
15ed6cc0 2777 if (serial_paranoia_check(info, tty->name, "cy_write"))
02f1175c 2778 return 0;
1da177e4 2779
02f1175c
JS		 2780 if (!info->xmit_buf)
2781 return 0;
1da177e4 2782
9fa1b3b1 2783 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 2784 while (1) {
1a4e2351
HH		 2785 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
2786 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
02f1175c
JS		 2787
2788 if (c <= 0)
2789 break;
2790
2791 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2792 info->xmit_head = (info->xmit_head + c) &
2793 (SERIAL_XMIT_SIZE - 1);
2794 info->xmit_cnt += c;
2795 buf += c;
2796 count -= c;
2797 ret += c;
2798 }
9fa1b3b1 2799 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c
JS		 2800
2801 info->idle_stats.xmit_bytes += ret;
2802 info->idle_stats.xmit_idle = jiffies;
2803
15ed6cc0 2804 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
02f1175c 2805 start_xmit(info);
15ed6cc0 2806
02f1175c
JS		 2807 return ret;
2808} /* cy_write */
1da177e4
LT		 2809
2810/*
2811 * This routine is called by the kernel to write a single
2812 * character to the tty device. If the kernel uses this routine,
2813 * it must call the flush_chars() routine (if defined) when it is
2814 * done stuffing characters into the driver. If there is no room
2815 * in the queue, the character is ignored.
2816 */
76b25a55 2817static int cy_put_char(struct tty_struct *tty, unsigned char ch)
1da177e4 2818{
cab9bdd1 2819 struct cyclades_port *info = tty->driver_data;
02f1175c 2820 unsigned long flags;
1da177e4
LT		 2821
2822#ifdef CY_DEBUG_IO
21719191 2823 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
1da177e4
LT		 2824#endif
2825
02f1175c 2826 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
76b25a55 2827 return 0;
1da177e4 2828
02f1175c 2829 if (!info->xmit_buf)
76b25a55 2830 return 0;
1da177e4 2831
9fa1b3b1 2832 spin_lock_irqsave(&info->card->card_lock, flags);
90cc3018 2833 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
9fa1b3b1 2834 spin_unlock_irqrestore(&info->card->card_lock, flags);
76b25a55 2835 return 0;
02f1175c 2836 }
1da177e4 2837
02f1175c
JS		 2838 info->xmit_buf[info->xmit_head++] = ch;
2839 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2840 info->xmit_cnt++;
1da177e4
LT		 2841 info->idle_stats.xmit_bytes++;
2842 info->idle_stats.xmit_idle = jiffies;
9fa1b3b1 2843 spin_unlock_irqrestore(&info->card->card_lock, flags);
76b25a55 2844 return 1;
02f1175c 2845} /* cy_put_char */
1da177e4
LT		 2846
2847/*
2848 * This routine is called by the kernel after it has written a
15ed6cc0 2849 * series of characters to the tty device using put_char().
1da177e4 2850 */
02f1175c 2851static void cy_flush_chars(struct tty_struct *tty)
1da177e4 2852{
cab9bdd1 2853 struct cyclades_port *info = tty->driver_data;
02f1175c 2854
1da177e4 2855#ifdef CY_DEBUG_IO
21719191 2856 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
1da177e4
LT		 2857#endif
2858
02f1175c
JS		 2859 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2860 return;
1da177e4 2861
02f1175c
JS		 2862 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2863 !info->xmit_buf)
2864 return;
1da177e4 2865
02f1175c
JS		 2866 start_xmit(info);
2867} /* cy_flush_chars */
1da177e4
LT		 2868
2869/*
2870 * This routine returns the numbers of characters the tty driver
2871 * will accept for queuing to be written. This number is subject
2872 * to change as output buffers get emptied, or if the output flow
2873 * control is activated.
2874 */
02f1175c 2875static int cy_write_room(struct tty_struct *tty)
1da177e4 2876{
cab9bdd1 2877 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 2878 int ret;
2879
1da177e4 2880#ifdef CY_DEBUG_IO
21719191 2881 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
1da177e4
LT		 2882#endif
2883
02f1175c
JS		 2884 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2885 return 0;
2886 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2887 if (ret < 0)
2888 ret = 0;
2889 return ret;
2890} /* cy_write_room */
1da177e4 2891
02f1175c 2892static int cy_chars_in_buffer(struct tty_struct *tty)
1da177e4 2893{
875b206b 2894 struct cyclades_card *card;
cab9bdd1 2895 struct cyclades_port *info = tty->driver_data;
875b206b 2896 int channel;
1da177e4 2897
02f1175c
JS		 2898 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2899 return 0;
2900
2901 card = info->card;
875b206b 2902 channel = (info->line) - (card->first_line);
1da177e4
LT		 2903
2904#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c
JS		 2905 if (!IS_CYC_Z(cy_card[card])) {
2906#endif /* Z_EXT_CHARS_IN_BUFFER */
1da177e4 2907#ifdef CY_DEBUG_IO
21719191
JS		 2908 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2909 info->line, info->xmit_cnt);
1da177e4 2910#endif
02f1175c 2911 return info->xmit_cnt;
1da177e4 2912#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c 2913 } else {
ad39c300
JS		 2914 static struct FIRM_ID *firm_id;
2915 static struct ZFW_CTRL *zfw_ctrl;
2916 static struct CH_CTRL *ch_ctrl;
2917 static struct BUF_CTRL *buf_ctrl;
02f1175c 2918 int char_count;
ad39c300 2919 __u32 tx_put, tx_get, tx_bufsize;
02f1175c 2920
978e595f 2921 lock_kernel();
875b206b
JS		 2922 firm_id = card->base_addr + ID_ADDRESS;
2923 zfw_ctrl = card->base_addr +
db05c3b1 2924 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2925 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2926 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2927
db05c3b1
JS		 2928 tx_get = readl(&buf_ctrl->tx_get);
2929 tx_put = readl(&buf_ctrl->tx_put);
2930 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
02f1175c
JS		 2931 if (tx_put >= tx_get)
2932 char_count = tx_put - tx_get;
2933 else
2934 char_count = tx_put - tx_get + tx_bufsize;
1da177e4 2935#ifdef CY_DEBUG_IO
21719191
JS		 2936 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2937 info->line, info->xmit_cnt + char_count);
1da177e4 2938#endif
978e595f 2939 unlock_kernel();
096dcfce 2940 return info->xmit_cnt + char_count;
02f1175c
JS		 2941 }
2942#endif /* Z_EXT_CHARS_IN_BUFFER */
2943} /* cy_chars_in_buffer */
1da177e4
LT		 2944
2945/*
2946 * ------------------------------------------------------------
2947 * cy_ioctl() and friends
2948 * ------------------------------------------------------------
2949 */
2950
1a86b5e3 2951static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
1da177e4 2952{
02f1175c 2953 int co, co_val, bpr;
1a86b5e3 2954 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
02f1175c 2955 25000000);
1da177e4 2956
02f1175c
JS		 2957 if (baud == 0) {
2958 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2959 return;
2960 }
1da177e4 2961
02f1175c
JS		 2962 /* determine which prescaler to use */
2963 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2964 if (cy_clock / co_val / baud > 63)
2965 break;
2966 }
1da177e4 2967
02f1175c
JS		 2968 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2969 if (bpr > 255)
2970 bpr = 255;
1da177e4 2971
02f1175c
JS		 2972 info->tbpr = info->rbpr = bpr;
2973 info->tco = info->rco = co;
1da177e4
LT		 2974}
2975
2976/*
2977 * This routine finds or computes the various line characteristics.
2978 * It used to be called config_setup
2979 */
02f1175c 2980static void set_line_char(struct cyclades_port *info)
1da177e4 2981{
875b206b 2982 struct cyclades_card *card;
02f1175c
JS		 2983 unsigned long flags;
2984 void __iomem *base_addr;
875b206b 2985 int chip, channel, index;
02f1175c
JS		 2986 unsigned cflag, iflag;
2987 unsigned short chip_number;
2988 int baud, baud_rate = 0;
2989 int i;
2990
15ed6cc0 2991 if (!info->tty || !info->tty->termios)
02f1175c 2992 return;
15ed6cc0
AC		 2993
2994 if (info->line == -1)
02f1175c 2995 return;
15ed6cc0 2996
02f1175c
JS		 2997 cflag = info->tty->termios->c_cflag;
2998 iflag = info->tty->termios->c_iflag;
1da177e4 2999
02f1175c
JS		 3000 /*
3001 * Set up the tty->alt_speed kludge
3002 */
3003 if (info->tty) {
3004 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3005 info->tty->alt_speed = 57600;
3006 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3007 info->tty->alt_speed = 115200;
3008 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3009 info->tty->alt_speed = 230400;
3010 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3011 info->tty->alt_speed = 460800;
1da177e4 3012 }
02f1175c
JS		 3013
3014 card = info->card;
875b206b 3015 channel = info->line - card->first_line;
02f1175c
JS		 3016 chip_number = channel / 4;
3017
875b206b 3018 if (!IS_CYC_Z(*card)) {
02f1175c 3019
875b206b 3020 index = card->bus_index;
02f1175c
JS		 3021
3022 /* baud rate */
3023 baud = tty_get_baud_rate(info->tty);
3024 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3025 ASYNC_SPD_CUST) {
3026 if (info->custom_divisor)
3027 baud_rate = info->baud / info->custom_divisor;
3028 else
3029 baud_rate = info->baud;
3030 } else if (baud > CD1400_MAX_SPEED) {
3031 baud = CD1400_MAX_SPEED;
3032 }
3033 /* find the baud index */
3034 for (i = 0; i < 20; i++) {
15ed6cc0 3035 if (baud == baud_table[i])
02f1175c 3036 break;
02f1175c 3037 }
15ed6cc0 3038 if (i == 20)
02f1175c 3039 i = 19; /* CD1400_MAX_SPEED */
02f1175c
JS		 3040
3041 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3042 ASYNC_SPD_CUST) {
3043 cyy_baud_calc(info, baud_rate);
3044 } else {
3045 if (info->chip_rev >= CD1400_REV_J) {
3046 /* It is a CD1400 rev. J or later */
3047 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3048 info->tco = baud_co_60[i]; /* Tx CO */
3049 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3050 info->rco = baud_co_60[i]; /* Rx CO */
3051 } else {
3052 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3053 info->tco = baud_co_25[i]; /* Tx CO */
3054 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3055 info->rco = baud_co_25[i]; /* Rx CO */
3056 }
3057 }
3058 if (baud_table[i] == 134) {
3059 /* get it right for 134.5 baud */
3060 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3061 2;
3062 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3063 ASYNC_SPD_CUST) {
3064 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3065 baud_rate) + 2;
3066 } else if (baud_table[i]) {
3067 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3068 baud_table[i]) + 2;
3069 /* this needs to be propagated into the card info */
3070 } else {
3071 info->timeout = 0;
3072 }
3073 /* By tradition (is it a standard?) a baud rate of zero
3074 implies the line should be/has been closed. A bit
3075 later in this routine such a test is performed. */
3076
3077 /* byte size and parity */
3078 info->cor5 = 0;
3079 info->cor4 = 0;
3080 /* receive threshold */
3081 info->cor3 = (info->default_threshold ?
3082 info->default_threshold : baud_cor3[i]);
3083 info->cor2 = CyETC;
3084 switch (cflag & CSIZE) {
3085 case CS5:
3086 info->cor1 = Cy_5_BITS;
3087 break;
3088 case CS6:
3089 info->cor1 = Cy_6_BITS;
3090 break;
3091 case CS7:
3092 info->cor1 = Cy_7_BITS;
3093 break;
3094 case CS8:
3095 info->cor1 = Cy_8_BITS;
3096 break;
3097 }
15ed6cc0 3098 if (cflag & CSTOPB)
02f1175c 3099 info->cor1 |= Cy_2_STOP;
15ed6cc0 3100
02f1175c 3101 if (cflag & PARENB) {
15ed6cc0 3102 if (cflag & PARODD)
02f1175c 3103 info->cor1 |= CyPARITY_O;
15ed6cc0 3104 else
02f1175c 3105 info->cor1 |= CyPARITY_E;
15ed6cc0 3106 } else
02f1175c 3107 info->cor1 |= CyPARITY_NONE;
02f1175c
JS		 3108
3109 /* CTS flow control flag */
3110 if (cflag & CRTSCTS) {
3111 info->flags |= ASYNC_CTS_FLOW;
3112 info->cor2 |= CyCtsAE;
3113 } else {
3114 info->flags &= ~ASYNC_CTS_FLOW;
3115 info->cor2 &= ~CyCtsAE;
3116 }
3117 if (cflag & CLOCAL)
3118 info->flags &= ~ASYNC_CHECK_CD;
3119 else
3120 info->flags |= ASYNC_CHECK_CD;
1da177e4
LT		 3121
3122 /***********************************************
3123 The hardware option, CyRtsAO, presents RTS when
3124 the chip has characters to send. Since most modems
3125 use RTS as reverse (inbound) flow control, this
3126 option is not used. If inbound flow control is
3127 necessary, DTR can be programmed to provide the
3128 appropriate signals for use with a non-standard
3129 cable. Contact Marcio Saito for details.
3130 ***********************************************/
3131
02f1175c
JS		 3132 chip = channel >> 2;
3133 channel &= 0x03;
875b206b 3134 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4 3135
9fa1b3b1 3136 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3137 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3138
3139 /* tx and rx baud rate */
3140
3141 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3142 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3143 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3144 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3145
3146 /* set line characteristics according configuration */
3147
3148 cy_writeb(base_addr + (CySCHR1 << index),
3149 START_CHAR(info->tty));
3150 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3151 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3152 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3153 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3154 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3155 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3156
3157 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3158 CyCOR3ch, index);
3159
15ed6cc0
AC		 3160 /* !!! Is this needed? */
3161 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
02f1175c
JS		 3162 cy_writeb(base_addr + (CyRTPR << index),
3163 (info->default_timeout ? info->default_timeout : 0x02));
3164 /* 10ms rx timeout */
3165
3166 if (C_CLOCAL(info->tty)) {
3167 /* without modem intr */
3168 cy_writeb(base_addr + (CySRER << index),
db05c3b1 3169 readb(base_addr + (CySRER << index)) | CyMdmCh);
02f1175c
JS		 3170 /* act on 1->0 modem transitions */
3171 if ((cflag & CRTSCTS) && info->rflow) {
3172 cy_writeb(base_addr + (CyMCOR1 << index),
3173 (CyCTS | rflow_thr[i]));
3174 } else {
3175 cy_writeb(base_addr + (CyMCOR1 << index),
3176 CyCTS);
3177 }
3178 /* act on 0->1 modem transitions */
3179 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
1da177e4 3180 } else {
02f1175c
JS		 3181 /* without modem intr */
3182 cy_writeb(base_addr + (CySRER << index),
db05c3b1 3183 readb(base_addr +
02f1175c
JS		 3184 (CySRER << index)) | CyMdmCh);
3185 /* act on 1->0 modem transitions */
3186 if ((cflag & CRTSCTS) && info->rflow) {
3187 cy_writeb(base_addr + (CyMCOR1 << index),
3188 (CyDSR | CyCTS | CyRI | CyDCD |
3189 rflow_thr[i]));
3190 } else {
3191 cy_writeb(base_addr + (CyMCOR1 << index),
3192 CyDSR | CyCTS | CyRI | CyDCD);
3193 }
3194 /* act on 0->1 modem transitions */
3195 cy_writeb(base_addr + (CyMCOR2 << index),
3196 CyDSR | CyCTS | CyRI | CyDCD);
1da177e4 3197 }
02f1175c
JS		 3198
3199 if (i == 0) { /* baud rate is zero, turn off line */
3200 if (info->rtsdtr_inv) {
3201 cy_writeb(base_addr + (CyMSVR1 << index),
3202 ~CyRTS);
3203 } else {
3204 cy_writeb(base_addr + (CyMSVR2 << index),
3205 ~CyDTR);
3206 }
1da177e4 3207#ifdef CY_DEBUG_DTR
21719191
JS		 3208 printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3209 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3210 readb(base_addr + (CyMSVR1 << index)),
3211 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3212#endif
02f1175c
JS		 3213 } else {
3214 if (info->rtsdtr_inv) {
3215 cy_writeb(base_addr + (CyMSVR1 << index),
3216 CyRTS);
3217 } else {
3218 cy_writeb(base_addr + (CyMSVR2 << index),
3219 CyDTR);
3220 }
1da177e4 3221#ifdef CY_DEBUG_DTR
21719191
JS		 3222 printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3223 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3224 readb(base_addr + (CyMSVR1 << index)),
3225 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3226#endif
02f1175c 3227 }
1da177e4 3228
15ed6cc0 3229 if (info->tty)
02f1175c 3230 clear_bit(TTY_IO_ERROR, &info->tty->flags);
9fa1b3b1 3231 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 3232
1da177e4 3233 } else {
02f1175c
JS		 3234 struct FIRM_ID __iomem *firm_id;
3235 struct ZFW_CTRL __iomem *zfw_ctrl;
3236 struct BOARD_CTRL __iomem *board_ctrl;
3237 struct CH_CTRL __iomem *ch_ctrl;
3238 struct BUF_CTRL __iomem *buf_ctrl;
1a86b5e3 3239 __u32 sw_flow;
02f1175c 3240 int retval;
1da177e4 3241
875b206b 3242 firm_id = card->base_addr + ID_ADDRESS;
15ed6cc0 3243 if (!ISZLOADED(*card))
02f1175c 3244 return;
1da177e4 3245
875b206b 3246 zfw_ctrl = card->base_addr +
db05c3b1 3247 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3248 board_ctrl = &zfw_ctrl->board_ctrl;
3249 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3250 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3251
3252 /* baud rate */
3253 baud = tty_get_baud_rate(info->tty);
3254 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3255 ASYNC_SPD_CUST) {
3256 if (info->custom_divisor)
3257 baud_rate = info->baud / info->custom_divisor;
3258 else
3259 baud_rate = info->baud;
3260 } else if (baud > CYZ_MAX_SPEED) {
3261 baud = CYZ_MAX_SPEED;
3262 }
3263 cy_writel(&ch_ctrl->comm_baud, baud);
3264
3265 if (baud == 134) {
3266 /* get it right for 134.5 baud */
3267 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3268 2;
3269 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3270 ASYNC_SPD_CUST) {
3271 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3272 baud_rate) + 2;
3273 } else if (baud) {
3274 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3275 baud) + 2;
3276 /* this needs to be propagated into the card info */
3277 } else {
3278 info->timeout = 0;
3279 }
1da177e4 3280
02f1175c
JS		 3281 /* byte size and parity */
3282 switch (cflag & CSIZE) {
3283 case CS5:
3284 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3285 break;
3286 case CS6:
3287 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3288 break;
3289 case CS7:
3290 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3291 break;
3292 case CS8:
3293 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3294 break;
3295 }
3296 if (cflag & CSTOPB) {
3297 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 3298 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
02f1175c
JS		 3299 } else {
3300 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 3301 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
02f1175c
JS		 3302 }
3303 if (cflag & PARENB) {
15ed6cc0 3304 if (cflag & PARODD)
02f1175c 3305 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
15ed6cc0 3306 else
02f1175c 3307 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
15ed6cc0 3308 } else
02f1175c 3309 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
1da177e4 3310
02f1175c
JS		 3311 /* CTS flow control flag */
3312 if (cflag & CRTSCTS) {
3313 cy_writel(&ch_ctrl->hw_flow,
db05c3b1 3314 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
02f1175c 3315 } else {
db05c3b1
JS		 3316 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3317 ~(C_RS_CTS | C_RS_RTS));
02f1175c
JS		 3318 }
3319 /* As the HW flow control is done in firmware, the driver
3320 doesn't need to care about it */
3321 info->flags &= ~ASYNC_CTS_FLOW;
3322
3323 /* XON/XOFF/XANY flow control flags */
3324 sw_flow = 0;
3325 if (iflag & IXON) {
3326 sw_flow |= C_FL_OXX;
3327 if (iflag & IXANY)
3328 sw_flow |= C_FL_OIXANY;
3329 }
3330 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3331
875b206b 3332 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
02f1175c 3333 if (retval != 0) {
21719191
JS		 3334 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3335 "was %x\n", info->line, retval);
02f1175c
JS		 3336 }
3337
3338 /* CD sensitivity */
15ed6cc0 3339 if (cflag & CLOCAL)
02f1175c 3340 info->flags &= ~ASYNC_CHECK_CD;
15ed6cc0 3341 else
02f1175c 3342 info->flags |= ASYNC_CHECK_CD;
1da177e4 3343
02f1175c
JS		 3344 if (baud == 0) { /* baud rate is zero, turn off line */
3345 cy_writel(&ch_ctrl->rs_control,
db05c3b1 3346 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
1da177e4 3347#ifdef CY_DEBUG_DTR
21719191 3348 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
1da177e4 3349#endif
02f1175c
JS		 3350 } else {
3351 cy_writel(&ch_ctrl->rs_control,
db05c3b1 3352 readl(&ch_ctrl->rs_control) | C_RS_DTR);
1da177e4 3353#ifdef CY_DEBUG_DTR
21719191 3354 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
1da177e4 3355#endif
02f1175c 3356 }
1da177e4 3357
15ed6cc0 3358 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
02f1175c 3359 if (retval != 0) {
21719191
JS		 3360 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3361 "was %x\n", info->line, retval);
02f1175c 3362 }
1da177e4 3363
15ed6cc0 3364 if (info->tty)
02f1175c 3365 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1da177e4 3366 }
02f1175c 3367} /* set_line_char */
1da177e4
LT		 3368
3369static int
02f1175c 3370get_serial_info(struct cyclades_port *info,
15ed6cc0 3371 struct serial_struct __user *retinfo)
1da177e4 3372{
02f1175c 3373 struct serial_struct tmp;
875b206b 3374 struct cyclades_card *cinfo = info->card;
1da177e4 3375
02f1175c
JS		 3376 if (!retinfo)
3377 return -EFAULT;
3378 memset(&tmp, 0, sizeof(tmp));
3379 tmp.type = info->type;
3380 tmp.line = info->line;
875b206b
JS		 3381 tmp.port = (info->card - cy_card) * 0x100 + info->line -
3382 cinfo->first_line;
02f1175c
JS		 3383 tmp.irq = cinfo->irq;
3384 tmp.flags = info->flags;
3385 tmp.close_delay = info->close_delay;
d5dedf99 3386 tmp.closing_wait = info->closing_wait;
02f1175c
JS		 3387 tmp.baud_base = info->baud;
3388 tmp.custom_divisor = info->custom_divisor;
3389 tmp.hub6 = 0; /*!!! */
3390 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3391} /* get_serial_info */
1da177e4
LT		 3392
3393static int
02f1175c 3394set_serial_info(struct cyclades_port *info,
15ed6cc0 3395 struct serial_struct __user *new_info)
1da177e4 3396{
02f1175c
JS		 3397 struct serial_struct new_serial;
3398 struct cyclades_port old_info;
3399
3400 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3401 return -EFAULT;
3402 old_info = *info;
3403
3404 if (!capable(CAP_SYS_ADMIN)) {
3405 if (new_serial.close_delay != info->close_delay ||
3406 new_serial.baud_base != info->baud ||
3407 (new_serial.flags & ASYNC_FLAGS &
3408 ~ASYNC_USR_MASK) !=
3409 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3410 return -EPERM;
3411 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3412 (new_serial.flags & ASYNC_USR_MASK);
3413 info->baud = new_serial.baud_base;
3414 info->custom_divisor = new_serial.custom_divisor;
3415 goto check_and_exit;
3416 }
3417
3418 /*
3419 * OK, past this point, all the error checking has been done.
3420 * At this point, we start making changes.....
3421 */
3422
3423 info->baud = new_serial.baud_base;
3424 info->custom_divisor = new_serial.custom_divisor;
3425 info->flags = (info->flags & ~ASYNC_FLAGS) |
3426 (new_serial.flags & ASYNC_FLAGS);
3427 info->close_delay = new_serial.close_delay * HZ / 100;
3428 info->closing_wait = new_serial.closing_wait * HZ / 100;
1da177e4
LT		 3429
3430check_and_exit:
02f1175c
JS		 3431 if (info->flags & ASYNC_INITIALIZED) {
3432 set_line_char(info);
3433 return 0;
3434 } else {
3435 return startup(info);
3436 }
3437} /* set_serial_info */
1da177e4
LT		 3438
3439/*
3440 * get_lsr_info - get line status register info
3441 *
3442 * Purpose: Let user call ioctl() to get info when the UART physically
3443 * is emptied. On bus types like RS485, the transmitter must
3444 * release the bus after transmitting. This must be done when
3445 * the transmit shift register is empty, not be done when the
3446 * transmit holding register is empty. This functionality
3447 * allows an RS485 driver to be written in user space.
3448 */
15ed6cc0 3449static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
1da177e4 3450{
875b206b
JS		 3451 struct cyclades_card *card;
3452 int chip, channel, index;
02f1175c
JS		 3453 unsigned char status;
3454 unsigned int result;
3455 unsigned long flags;
3456 void __iomem *base_addr;
1da177e4 3457
02f1175c 3458 card = info->card;
875b206b
JS		 3459 channel = (info->line) - (card->first_line);
3460 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3461 chip = channel >> 2;
3462 channel &= 0x03;
875b206b
JS		 3463 index = card->bus_index;
3464 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 3465
9fa1b3b1 3466 spin_lock_irqsave(&card->card_lock, flags);
db05c3b1 3467 status = readb(base_addr + (CySRER << index)) &
02f1175c 3468 (CyTxRdy | CyTxMpty);
9fa1b3b1 3469 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3470 result = (status ? 0 : TIOCSER_TEMT);
3471 } else {
3472 /* Not supported yet */
3473 return -EINVAL;
3474 }
3475 return put_user(result, (unsigned long __user *)value);
1da177e4
LT		 3476}
3477
02f1175c 3478static int cy_tiocmget(struct tty_struct *tty, struct file *file)
1da177e4 3479{
cab9bdd1 3480 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 3481 struct cyclades_card *card;
3482 int chip, channel, index;
02f1175c
JS		 3483 void __iomem *base_addr;
3484 unsigned long flags;
3485 unsigned char status;
3486 unsigned long lstatus;
3487 unsigned int result;
3488 struct FIRM_ID __iomem *firm_id;
3489 struct ZFW_CTRL __iomem *zfw_ctrl;
3490 struct BOARD_CTRL __iomem *board_ctrl;
3491 struct CH_CTRL __iomem *ch_ctrl;
3492
bf9d8929 3493 if (serial_paranoia_check(info, tty->name, __func__))
02f1175c 3494 return -ENODEV;
1da177e4 3495
7b130c0e
AC		 3496 lock_kernel();
3497
02f1175c 3498 card = info->card;
875b206b
JS		 3499 channel = info->line - card->first_line;
3500 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3501 chip = channel >> 2;
3502 channel &= 0x03;
875b206b
JS		 3503 index = card->bus_index;
3504 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4 3505
9fa1b3b1 3506 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3507 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
db05c3b1
JS		 3508 status = readb(base_addr + (CyMSVR1 << index));
3509 status |= readb(base_addr + (CyMSVR2 << index));
9fa1b3b1 3510 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3511
3512 if (info->rtsdtr_inv) {
3513 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3514 ((status & CyDTR) ? TIOCM_RTS : 0);
3515 } else {
3516 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3517 ((status & CyDTR) ? TIOCM_DTR : 0);
3518 }
3519 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3520 ((status & CyRI) ? TIOCM_RNG : 0) |
3521 ((status & CyDSR) ? TIOCM_DSR : 0) |
3522 ((status & CyCTS) ? TIOCM_CTS : 0);
1da177e4 3523 } else {
875b206b
JS		 3524 base_addr = card->base_addr;
3525 firm_id = card->base_addr + ID_ADDRESS;
3526 if (ISZLOADED(*card)) {
3527 zfw_ctrl = card->base_addr +
db05c3b1 3528 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3529 board_ctrl = &zfw_ctrl->board_ctrl;
3530 ch_ctrl = zfw_ctrl->ch_ctrl;
db05c3b1 3531 lstatus = readl(&ch_ctrl[channel].rs_status);
02f1175c
JS		 3532 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3533 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3534 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3535 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3536 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3537 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3538 } else {
3539 result = 0;
7b130c0e 3540 unlock_kernel();
02f1175c
JS		 3541 return -ENODEV;
3542 }
1da177e4 3543
02f1175c 3544 }
7b130c0e 3545 unlock_kernel();
02f1175c
JS		 3546 return result;
3547} /* cy_tiomget */
1da177e4
LT		 3548
3549static int
3550cy_tiocmset(struct tty_struct *tty, struct file *file,
02f1175c 3551 unsigned int set, unsigned int clear)
1da177e4 3552{
cab9bdd1 3553 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 3554 struct cyclades_card *card;
3555 int chip, channel, index;
02f1175c
JS		 3556 void __iomem *base_addr;
3557 unsigned long flags;
3558 struct FIRM_ID __iomem *firm_id;
3559 struct ZFW_CTRL __iomem *zfw_ctrl;
3560 struct BOARD_CTRL __iomem *board_ctrl;
3561 struct CH_CTRL __iomem *ch_ctrl;
3562 int retval;
3563
bf9d8929 3564 if (serial_paranoia_check(info, tty->name, __func__))
02f1175c
JS		 3565 return -ENODEV;
3566
3567 card = info->card;
875b206b
JS		 3568 channel = (info->line) - (card->first_line);
3569 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3570 chip = channel >> 2;
3571 channel &= 0x03;
875b206b
JS		 3572 index = card->bus_index;
3573 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c
JS		 3574
3575 if (set & TIOCM_RTS) {
9fa1b3b1 3576 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3577 cy_writeb(base_addr + (CyCAR << index),
3578 (u_char) channel);
3579 if (info->rtsdtr_inv) {
3580 cy_writeb(base_addr + (CyMSVR2 << index),
3581 CyDTR);
3582 } else {
3583 cy_writeb(base_addr + (CyMSVR1 << index),
3584 CyRTS);
3585 }
9fa1b3b1 3586 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3587 }
3588 if (clear & TIOCM_RTS) {
9fa1b3b1 3589 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3590 cy_writeb(base_addr + (CyCAR << index),
3591 (u_char) channel);
3592 if (info->rtsdtr_inv) {
3593 cy_writeb(base_addr + (CyMSVR2 << index),
3594 ~CyDTR);
3595 } else {
3596 cy_writeb(base_addr + (CyMSVR1 << index),
3597 ~CyRTS);
3598 }
9fa1b3b1 3599 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3600 }
3601 if (set & TIOCM_DTR) {
9fa1b3b1 3602 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3603 cy_writeb(base_addr + (CyCAR << index),
3604 (u_char) channel);
3605 if (info->rtsdtr_inv) {
3606 cy_writeb(base_addr + (CyMSVR1 << index),
3607 CyRTS);
3608 } else {
3609 cy_writeb(base_addr + (CyMSVR2 << index),
3610 CyDTR);
3611 }
1da177e4 3612#ifdef CY_DEBUG_DTR
21719191
JS		 3613 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3614 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3615 readb(base_addr + (CyMSVR1 << index)),
3616 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3617#endif
9fa1b3b1 3618 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3619 }
3620 if (clear & TIOCM_DTR) {
9fa1b3b1 3621 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3622 cy_writeb(base_addr + (CyCAR << index),
3623 (u_char) channel);
3624 if (info->rtsdtr_inv) {
3625 cy_writeb(base_addr + (CyMSVR1 << index),
3626 ~CyRTS);
3627 } else {
3628 cy_writeb(base_addr + (CyMSVR2 << index),
3629 ~CyDTR);
3630 }
1da177e4
LT		 3631
3632#ifdef CY_DEBUG_DTR
21719191
JS		 3633 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3634 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3635 readb(base_addr + (CyMSVR1 << index)),
3636 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3637#endif
9fa1b3b1 3638 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3639 }
3640 } else {
875b206b 3641 base_addr = card->base_addr;
02f1175c 3642
875b206b
JS		 3643 firm_id = card->base_addr + ID_ADDRESS;
3644 if (ISZLOADED(*card)) {
3645 zfw_ctrl = card->base_addr +
db05c3b1 3646 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3647 board_ctrl = &zfw_ctrl->board_ctrl;
3648 ch_ctrl = zfw_ctrl->ch_ctrl;
3649
3650 if (set & TIOCM_RTS) {
9fa1b3b1 3651 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3652 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3653 readl(&ch_ctrl[channel].rs_control) |
3654 C_RS_RTS);
9fa1b3b1 3655 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3656 }
3657 if (clear & TIOCM_RTS) {
9fa1b3b1 3658 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3659 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3660 readl(&ch_ctrl[channel].rs_control) &
3661 ~C_RS_RTS);
9fa1b3b1 3662 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3663 }
3664 if (set & TIOCM_DTR) {
9fa1b3b1 3665 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3666 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3667 readl(&ch_ctrl[channel].rs_control) |
3668 C_RS_DTR);
1da177e4 3669#ifdef CY_DEBUG_DTR
21719191
JS		 3670 printk(KERN_DEBUG "cyc:set_modem_info raising "
3671 "Z DTR\n");
1da177e4 3672#endif
9fa1b3b1 3673 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3674 }
3675 if (clear & TIOCM_DTR) {
9fa1b3b1 3676 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3677 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3678 readl(&ch_ctrl[channel].rs_control) &
3679 ~C_RS_DTR);
1da177e4 3680#ifdef CY_DEBUG_DTR
21719191
JS		 3681 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3682 "Z DTR\n");
1da177e4 3683#endif
9fa1b3b1 3684 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3685 }
3686 } else {
3687 return -ENODEV;
3688 }
9fa1b3b1
JS		 3689 spin_lock_irqsave(&card->card_lock, flags);
3690 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
02f1175c 3691 if (retval != 0) {
21719191
JS		 3692 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3693 "was %x\n", info->line, retval);
02f1175c 3694 }
9fa1b3b1 3695 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 3696 }
02f1175c
JS		 3697 return 0;
3698} /* cy_tiocmset */
1da177e4
LT		 3699
3700/*
3701 * cy_break() --- routine which turns the break handling on or off
3702 */
02f1175c 3703static void cy_break(struct tty_struct *tty, int break_state)
1da177e4 3704{
cab9bdd1 3705 struct cyclades_port *info = tty->driver_data;
9fa1b3b1 3706 struct cyclades_card *card;
02f1175c 3707 unsigned long flags;
1da177e4 3708
02f1175c
JS		 3709 if (serial_paranoia_check(info, tty->name, "cy_break"))
3710 return;
1da177e4 3711
9fa1b3b1
JS		 3712 card = info->card;
3713
3714 spin_lock_irqsave(&card->card_lock, flags);
3715 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3716 /* Let the transmit ISR take care of this (since it
3717 requires stuffing characters into the output stream).
3718 */
3719 if (break_state == -1) {
3720 if (!info->breakon) {
3721 info->breakon = 1;
3722 if (!info->xmit_cnt) {
9fa1b3b1 3723 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 3724 start_xmit(info);
9fa1b3b1 3725 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3726 }
3727 }
3728 } else {
3729 if (!info->breakoff) {
3730 info->breakoff = 1;
3731 if (!info->xmit_cnt) {
9fa1b3b1 3732 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 3733 start_xmit(info);
9fa1b3b1 3734 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3735 }
3736 }
1da177e4 3737 }
1da177e4 3738 } else {
02f1175c
JS		 3739 int retval;
3740
3741 if (break_state == -1) {
9fa1b3b1
JS		 3742 retval = cyz_issue_cmd(card,
3743 info->line - card->first_line,
02f1175c
JS		 3744 C_CM_SET_BREAK, 0L);
3745 if (retval != 0) {
21719191
JS		 3746 printk(KERN_ERR "cyc:cy_break (set) retval on "
3747 "ttyC%d was %x\n", info->line, retval);
02f1175c
JS		 3748 }
3749 } else {
9fa1b3b1
JS		 3750 retval = cyz_issue_cmd(card,
3751 info->line - card->first_line,
02f1175c
JS		 3752 C_CM_CLR_BREAK, 0L);
3753 if (retval != 0) {
21719191
JS		 3754 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3755 "on ttyC%d was %x\n", info->line,
3756 retval);
02f1175c 3757 }
1da177e4 3758 }
1da177e4 3759 }
9fa1b3b1 3760 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 3761} /* cy_break */
1da177e4 3762
15ed6cc0
AC		 3763static int get_mon_info(struct cyclades_port *info,
3764 struct cyclades_monitor __user *mon)
1da177e4
LT		 3765{
3766
02f1175c
JS		 3767 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3768 return -EFAULT;
3769 info->mon.int_count = 0;
3770 info->mon.char_count = 0;
3771 info->mon.char_max = 0;
3772 info->mon.char_last = 0;
3773 return 0;
3774} /* get_mon_info */
1da177e4 3775
02f1175c 3776static int set_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 3777{
875b206b 3778 struct cyclades_card *card;
02f1175c 3779 void __iomem *base_addr;
875b206b 3780 int channel, chip, index;
02f1175c 3781 unsigned long flags;
1da177e4 3782
02f1175c 3783 card = info->card;
875b206b
JS		 3784 channel = info->line - card->first_line;
3785 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3786 chip = channel >> 2;
3787 channel &= 0x03;
875b206b 3788 index = card->bus_index;
02f1175c 3789 base_addr =
875b206b 3790 card->base_addr + (cy_chip_offset[chip] << index);
02f1175c
JS		 3791
3792 info->cor3 &= ~CyREC_FIFO;
3793 info->cor3 |= value & CyREC_FIFO;
1da177e4 3794
9fa1b3b1 3795 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3796 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3797 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
9fa1b3b1 3798 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3799 }
3800 return 0;
3801} /* set_threshold */
1da177e4 3802
15ed6cc0
AC		 3803static int get_threshold(struct cyclades_port *info,
3804 unsigned long __user *value)
1da177e4 3805{
875b206b 3806 struct cyclades_card *card;
02f1175c 3807 void __iomem *base_addr;
875b206b 3808 int channel, chip, index;
02f1175c 3809 unsigned long tmp;
1da177e4 3810
02f1175c 3811 card = info->card;
875b206b
JS		 3812 channel = info->line - card->first_line;
3813 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3814 chip = channel >> 2;
3815 channel &= 0x03;
875b206b
JS		 3816 index = card->bus_index;
3817 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 3818
db05c3b1 3819 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
02f1175c 3820 return put_user(tmp, value);
02f1175c 3821 }
f7429034 3822 return 0;
02f1175c 3823} /* get_threshold */
1da177e4 3824
15ed6cc0
AC		 3825static int set_default_threshold(struct cyclades_port *info,
3826 unsigned long value)
1da177e4 3827{
02f1175c
JS		 3828 info->default_threshold = value & 0x0f;
3829 return 0;
3830} /* set_default_threshold */
1da177e4 3831
15ed6cc0
AC		 3832static int get_default_threshold(struct cyclades_port *info,
3833 unsigned long __user *value)
1da177e4 3834{
02f1175c
JS		 3835 return put_user(info->default_threshold, value);
3836} /* get_default_threshold */
1da177e4 3837
02f1175c 3838static int set_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3839{
875b206b 3840 struct cyclades_card *card;
02f1175c 3841 void __iomem *base_addr;
875b206b 3842 int channel, chip, index;
02f1175c 3843 unsigned long flags;
1da177e4 3844
02f1175c 3845 card = info->card;
875b206b
JS		 3846 channel = info->line - card->first_line;
3847 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3848 chip = channel >> 2;
3849 channel &= 0x03;
875b206b
JS		 3850 index = card->bus_index;
3851 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4 3852
9fa1b3b1 3853 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3854 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
9fa1b3b1 3855 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3856 }
3857 return 0;
3858} /* set_timeout */
1da177e4 3859
15ed6cc0
AC		 3860static int get_timeout(struct cyclades_port *info,
3861 unsigned long __user *value)
1da177e4 3862{
875b206b 3863 struct cyclades_card *card;
02f1175c 3864 void __iomem *base_addr;
875b206b 3865 int channel, chip, index;
02f1175c 3866 unsigned long tmp;
1da177e4 3867
02f1175c 3868 card = info->card;
875b206b
JS		 3869 channel = info->line - card->first_line;
3870 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 3871 chip = channel >> 2;
3872 channel &= 0x03;
875b206b
JS		 3873 index = card->bus_index;
3874 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 3875
db05c3b1 3876 tmp = readb(base_addr + (CyRTPR << index));
02f1175c 3877 return put_user(tmp, value);
02f1175c 3878 }
f7429034 3879 return 0;
02f1175c 3880} /* get_timeout */
1da177e4 3881
02f1175c 3882static int set_default_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3883{
02f1175c
JS		 3884 info->default_timeout = value & 0xff;
3885 return 0;
3886} /* set_default_timeout */
1da177e4 3887
15ed6cc0
AC		 3888static int get_default_timeout(struct cyclades_port *info,
3889 unsigned long __user *value)
1da177e4 3890{
02f1175c
JS		 3891 return put_user(info->default_timeout, value);
3892} /* get_default_timeout */
1da177e4
LT		 3893
3894/*
3895 * This routine allows the tty driver to implement device-
3896 * specific ioctl's. If the ioctl number passed in cmd is
3897 * not recognized by the driver, it should return ENOIOCTLCMD.
3898 */
3899static int
02f1175c
JS		 3900cy_ioctl(struct tty_struct *tty, struct file *file,
3901 unsigned int cmd, unsigned long arg)
1da177e4 3902{
cab9bdd1 3903 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 3904 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3905 struct serial_icounter_struct __user *p_cuser; /* user space */
3906 int ret_val = 0;
3907 unsigned long flags;
3908 void __user *argp = (void __user *)arg;
3909
3910 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3911 return -ENODEV;
1da177e4
LT		 3912
3913#ifdef CY_DEBUG_OTHER
21719191
JS		 3914 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3915 info->line, cmd, arg);
1da177e4 3916#endif
7b130c0e 3917 lock_kernel();
1da177e4 3918
02f1175c
JS		 3919 switch (cmd) {
3920 case CYGETMON:
3921 ret_val = get_mon_info(info, argp);
3922 break;
3923 case CYGETTHRESH:
3924 ret_val = get_threshold(info, argp);
3925 break;
3926 case CYSETTHRESH:
3927 ret_val = set_threshold(info, arg);
3928 break;
3929 case CYGETDEFTHRESH:
3930 ret_val = get_default_threshold(info, argp);
3931 break;
3932 case CYSETDEFTHRESH:
3933 ret_val = set_default_threshold(info, arg);
3934 break;
3935 case CYGETTIMEOUT:
3936 ret_val = get_timeout(info, argp);
3937 break;
3938 case CYSETTIMEOUT:
3939 ret_val = set_timeout(info, arg);
3940 break;
3941 case CYGETDEFTIMEOUT:
3942 ret_val = get_default_timeout(info, argp);
3943 break;
3944 case CYSETDEFTIMEOUT:
3945 ret_val = set_default_timeout(info, arg);
3946 break;
1da177e4 3947 case CYSETRFLOW:
02f1175c
JS		 3948 info->rflow = (int)arg;
3949 ret_val = 0;
3950 break;
1da177e4 3951 case CYGETRFLOW:
02f1175c
JS		 3952 ret_val = info->rflow;
3953 break;
1da177e4 3954 case CYSETRTSDTR_INV:
02f1175c
JS		 3955 info->rtsdtr_inv = (int)arg;
3956 ret_val = 0;
3957 break;
1da177e4 3958 case CYGETRTSDTR_INV:
02f1175c
JS		 3959 ret_val = info->rtsdtr_inv;
3960 break;
1da177e4 3961 case CYGETCD1400VER:
02f1175c
JS		 3962 ret_val = info->chip_rev;
3963 break;
1da177e4
LT		 3964#ifndef CONFIG_CYZ_INTR
3965 case CYZSETPOLLCYCLE:
02f1175c
JS		 3966 cyz_polling_cycle = (arg * HZ) / 1000;
3967 ret_val = 0;
3968 break;
1da177e4 3969 case CYZGETPOLLCYCLE:
02f1175c
JS		 3970 ret_val = (cyz_polling_cycle * 1000) / HZ;
3971 break;
3972#endif /* CONFIG_CYZ_INTR */
1da177e4 3973 case CYSETWAIT:
15ed6cc0 3974 info->closing_wait = (unsigned short)arg * HZ / 100;
02f1175c
JS		 3975 ret_val = 0;
3976 break;
1da177e4 3977 case CYGETWAIT:
02f1175c
JS		 3978 ret_val = info->closing_wait / (HZ / 100);
3979 break;
3980 case TIOCGSERIAL:
3981 ret_val = get_serial_info(info, argp);
3982 break;
3983 case TIOCSSERIAL:
3984 ret_val = set_serial_info(info, argp);
3985 break;
3986 case TIOCSERGETLSR: /* Get line status register */
3987 ret_val = get_lsr_info(info, argp);
3988 break;
3989 /*
3990 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
3991 * - mask passed in arg for lines of interest
3992 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
3993 * Caller should use TIOCGICOUNT to see which one it was
3994 */
1da177e4 3995 case TIOCMIWAIT:
9fa1b3b1 3996 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 3997 /* note the counters on entry */
2c7fea99 3998 cnow = info->icount;
9fa1b3b1 3999 spin_unlock_irqrestore(&info->card->card_lock, flags);
2c7fea99
JS		 4000 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
4001 cprev = cnow;
9fa1b3b1 4002 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 4003 cnow = info->icount; /* atomic copy */
9fa1b3b1 4004 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c 4005
2c7fea99
JS		 4006 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4007 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4008 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4009 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
4010 }));
4011 break;
1da177e4 4012
02f1175c
JS		 4013 /*
4014 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4015 * Return: write counters to the user passed counter struct
4016 * NB: both 1->0 and 0->1 transitions are counted except for
4017 * RI where only 0->1 is counted.
4018 */
1da177e4 4019 case TIOCGICOUNT:
9fa1b3b1 4020 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 4021 cnow = info->icount;
9fa1b3b1 4022 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c
JS		 4023 p_cuser = argp;
4024 ret_val = put_user(cnow.cts, &p_cuser->cts);
4025 if (ret_val)
7b130c0e 4026 break;
02f1175c
JS		 4027 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4028 if (ret_val)
7b130c0e 4029 break;
02f1175c
JS		 4030 ret_val = put_user(cnow.rng, &p_cuser->rng);
4031 if (ret_val)
7b130c0e 4032 break;
02f1175c
JS		 4033 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4034 if (ret_val)
7b130c0e 4035 break;
02f1175c
JS		 4036 ret_val = put_user(cnow.rx, &p_cuser->rx);
4037 if (ret_val)
7b130c0e 4038 break;
02f1175c
JS		 4039 ret_val = put_user(cnow.tx, &p_cuser->tx);
4040 if (ret_val)
7b130c0e 4041 break;
02f1175c
JS		 4042 ret_val = put_user(cnow.frame, &p_cuser->frame);
4043 if (ret_val)
7b130c0e 4044 break;
02f1175c
JS		 4045 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4046 if (ret_val)
7b130c0e 4047 break;
02f1175c
JS		 4048 ret_val = put_user(cnow.parity, &p_cuser->parity);
4049 if (ret_val)
7b130c0e 4050 break;
02f1175c
JS		 4051 ret_val = put_user(cnow.brk, &p_cuser->brk);
4052 if (ret_val)
7b130c0e 4053 break;
02f1175c
JS		 4054 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4055 if (ret_val)
7b130c0e 4056 break;
02f1175c
JS		 4057 ret_val = 0;
4058 break;
4059 default:
4060 ret_val = -ENOIOCTLCMD;
4061 }
7b130c0e 4062 unlock_kernel();
1da177e4
LT		 4063
4064#ifdef CY_DEBUG_OTHER
21719191 4065 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
1da177e4 4066#endif
02f1175c
JS		 4067 return ret_val;
4068} /* cy_ioctl */
1da177e4
LT		 4069
4070/*
4071 * This routine allows the tty driver to be notified when
4072 * device's termios settings have changed. Note that a
4073 * well-designed tty driver should be prepared to accept the case
4074 * where old == NULL, and try to do something rational.
4075 */
02f1175c 4076static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 4077{
cab9bdd1 4078 struct cyclades_port *info = tty->driver_data;
1da177e4
LT		 4079
4080#ifdef CY_DEBUG_OTHER
21719191 4081 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
1da177e4
LT		 4082#endif
4083
02f1175c
JS		 4084 set_line_char(info);
4085
4086 if ((old_termios->c_cflag & CRTSCTS) &&
4087 !(tty->termios->c_cflag & CRTSCTS)) {
4088 tty->hw_stopped = 0;
4089 cy_start(tty);
4090 }
1da177e4 4091#if 0
02f1175c
JS		 4092 /*
4093 * No need to wake up processes in open wait, since they
4094 * sample the CLOCAL flag once, and don't recheck it.
4095 * XXX It's not clear whether the current behavior is correct
4096 * or not. Hence, this may change.....
4097 */
4098 if (!(old_termios->c_cflag & CLOCAL) &&
4099 (tty->termios->c_cflag & CLOCAL))
4100 wake_up_interruptible(&info->open_wait);
1da177e4 4101#endif
02f1175c 4102} /* cy_set_termios */
1da177e4
LT		 4103
4104/* This function is used to send a high-priority XON/XOFF character to
4105 the device.
4106*/
02f1175c 4107static void cy_send_xchar(struct tty_struct *tty, char ch)
1da177e4 4108{
cab9bdd1 4109 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 4110 struct cyclades_card *card;
4111 int channel;
1da177e4 4112
02f1175c 4113 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
1da177e4
LT		 4114 return;
4115
02f1175c 4116 info->x_char = ch;
1da177e4
LT		 4117
4118 if (ch)
02f1175c 4119 cy_start(tty);
1da177e4
LT		 4120
4121 card = info->card;
875b206b 4122 channel = info->line - card->first_line;
1da177e4 4123
875b206b 4124 if (IS_CYC_Z(*card)) {
02f1175c 4125 if (ch == STOP_CHAR(tty))
875b206b 4126 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
02f1175c 4127 else if (ch == START_CHAR(tty))
875b206b 4128 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
1da177e4
LT		 4129 }
4130}
4131
4132/* This routine is called by the upper-layer tty layer to signal
4133 that incoming characters should be throttled because the input
4134 buffers are close to full.
4135 */
02f1175c 4136static void cy_throttle(struct tty_struct *tty)
1da177e4 4137{
cab9bdd1 4138 struct cyclades_port *info = tty->driver_data;
875b206b 4139 struct cyclades_card *card;
02f1175c
JS		 4140 unsigned long flags;
4141 void __iomem *base_addr;
875b206b 4142 int chip, channel, index;
1da177e4
LT		 4143
4144#ifdef CY_DEBUG_THROTTLE
02f1175c 4145 char buf[64];
1da177e4 4146
21719191 4147 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
02f1175c 4148 tty->ldisc.chars_in_buffer(tty), info->line);
1da177e4
LT		 4149#endif
4150
15ed6cc0 4151 if (serial_paranoia_check(info, tty->name, "cy_throttle"))
02f1175c 4152 return;
02f1175c
JS		 4153
4154 card = info->card;
4155
4156 if (I_IXOFF(tty)) {
875b206b 4157 if (!IS_CYC_Z(*card))
02f1175c
JS		 4158 cy_send_xchar(tty, STOP_CHAR(tty));
4159 else
4160 info->throttle = 1;
4161 }
1da177e4 4162
02f1175c 4163 if (tty->termios->c_cflag & CRTSCTS) {
875b206b
JS		 4164 channel = info->line - card->first_line;
4165 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 4166 chip = channel >> 2;
4167 channel &= 0x03;
875b206b
JS		 4168 index = card->bus_index;
4169 base_addr = card->base_addr +
02f1175c
JS		 4170 (cy_chip_offset[chip] << index);
4171
9fa1b3b1 4172 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 4173 cy_writeb(base_addr + (CyCAR << index),
4174 (u_char) channel);
4175 if (info->rtsdtr_inv) {
4176 cy_writeb(base_addr + (CyMSVR2 << index),
4177 ~CyDTR);
4178 } else {
4179 cy_writeb(base_addr + (CyMSVR1 << index),
4180 ~CyRTS);
4181 }
9fa1b3b1 4182 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 4183 } else {
4184 info->throttle = 1;
4185 }
4186 }
02f1175c 4187} /* cy_throttle */
1da177e4
LT		 4188
4189/*
4190 * This routine notifies the tty driver that it should signal
4191 * that characters can now be sent to the tty without fear of
4192 * overrunning the input buffers of the line disciplines.
4193 */
02f1175c 4194static void cy_unthrottle(struct tty_struct *tty)
1da177e4 4195{
cab9bdd1 4196 struct cyclades_port *info = tty->driver_data;
875b206b 4197 struct cyclades_card *card;
02f1175c
JS		 4198 unsigned long flags;
4199 void __iomem *base_addr;
875b206b 4200 int chip, channel, index;
1da177e4
LT		 4201
4202#ifdef CY_DEBUG_THROTTLE
02f1175c
JS		 4203 char buf[64];
4204
21719191 4205 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
15ed6cc0 4206 tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
1da177e4
LT		 4207#endif
4208
15ed6cc0 4209 if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
02f1175c 4210 return;
1da177e4 4211
02f1175c
JS		 4212 if (I_IXOFF(tty)) {
4213 if (info->x_char)
4214 info->x_char = 0;
4215 else
4216 cy_send_xchar(tty, START_CHAR(tty));
1da177e4 4217 }
1da177e4 4218
02f1175c
JS		 4219 if (tty->termios->c_cflag & CRTSCTS) {
4220 card = info->card;
875b206b
JS		 4221 channel = info->line - card->first_line;
4222 if (!IS_CYC_Z(*card)) {
02f1175c
JS		 4223 chip = channel >> 2;
4224 channel &= 0x03;
875b206b
JS		 4225 index = card->bus_index;
4226 base_addr = card->base_addr +
02f1175c
JS		 4227 (cy_chip_offset[chip] << index);
4228
9fa1b3b1 4229 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 4230 cy_writeb(base_addr + (CyCAR << index),
4231 (u_char) channel);
4232 if (info->rtsdtr_inv) {
4233 cy_writeb(base_addr + (CyMSVR2 << index),
4234 CyDTR);
4235 } else {
4236 cy_writeb(base_addr + (CyMSVR1 << index),
4237 CyRTS);
4238 }
9fa1b3b1 4239 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 4240 } else {
4241 info->throttle = 0;
4242 }
4243 }
02f1175c 4244} /* cy_unthrottle */
1da177e4
LT		 4245
4246/* cy_start and cy_stop provide software output flow control as a
4247 function of XON/XOFF, software CTS, and other such stuff.
4248*/
02f1175c 4249static void cy_stop(struct tty_struct *tty)
1da177e4 4250{
02f1175c 4251 struct cyclades_card *cinfo;
cab9bdd1 4252 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4253 void __iomem *base_addr;
4254 int chip, channel, index;
4255 unsigned long flags;
1da177e4
LT		 4256
4257#ifdef CY_DEBUG_OTHER
21719191 4258 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
1da177e4
LT		 4259#endif
4260
02f1175c
JS		 4261 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4262 return;
1da177e4 4263
875b206b 4264 cinfo = info->card;
02f1175c
JS		 4265 channel = info->line - cinfo->first_line;
4266 if (!IS_CYC_Z(*cinfo)) {
4267 index = cinfo->bus_index;
4268 chip = channel >> 2;
4269 channel &= 0x03;
9fa1b3b1 4270 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
1da177e4 4271
9fa1b3b1 4272 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 4273 cy_writeb(base_addr + (CyCAR << index),
4274 (u_char)(channel & 0x0003)); /* index channel */
4275 cy_writeb(base_addr + (CySRER << index),
db05c3b1 4276 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
9fa1b3b1 4277 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c 4278 }
02f1175c 4279} /* cy_stop */
1da177e4 4280
02f1175c 4281static void cy_start(struct tty_struct *tty)
1da177e4 4282{
02f1175c 4283 struct cyclades_card *cinfo;
cab9bdd1 4284 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4285 void __iomem *base_addr;
4286 int chip, channel, index;
4287 unsigned long flags;
1da177e4
LT		 4288
4289#ifdef CY_DEBUG_OTHER
21719191 4290 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
1da177e4
LT		 4291#endif
4292
02f1175c
JS		 4293 if (serial_paranoia_check(info, tty->name, "cy_start"))
4294 return;
1da177e4 4295
875b206b 4296 cinfo = info->card;
02f1175c
JS		 4297 channel = info->line - cinfo->first_line;
4298 index = cinfo->bus_index;
4299 if (!IS_CYC_Z(*cinfo)) {
4300 chip = channel >> 2;
4301 channel &= 0x03;
9fa1b3b1 4302 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
1da177e4 4303
9fa1b3b1 4304 spin_lock_irqsave(&cinfo->card_lock, flags);
15ed6cc0
AC		 4305 cy_writeb(base_addr + (CyCAR << index),
4306 (u_char) (channel & 0x0003)); /* index channel */
02f1175c 4307 cy_writeb(base_addr + (CySRER << index),
db05c3b1 4308 readb(base_addr + (CySRER << index)) | CyTxRdy);
9fa1b3b1 4309 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c 4310 }
02f1175c 4311} /* cy_start */
1da177e4 4312
1da177e4
LT		 4313/*
4314 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4315 */
02f1175c 4316static void cy_hangup(struct tty_struct *tty)
1da177e4 4317{
cab9bdd1 4318 struct cyclades_port *info = tty->driver_data;
02f1175c 4319
1da177e4 4320#ifdef CY_DEBUG_OTHER
21719191 4321 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
1da177e4
LT		 4322#endif
4323
02f1175c
JS		 4324 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4325 return;
1da177e4 4326
02f1175c
JS		 4327 cy_flush_buffer(tty);
4328 shutdown(info);
02f1175c 4329 info->count = 0;
1da177e4 4330#ifdef CY_DEBUG_COUNT
21719191
JS		 4331 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4332 current->pid);
1da177e4 4333#endif
02f1175c
JS		 4334 info->tty = NULL;
4335 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4336 wake_up_interruptible(&info->open_wait);
4337} /* cy_hangup */
1da177e4
LT		 4338
4339/*
4340 * ---------------------------------------------------------------------
4341 * cy_init() and friends
4342 *
4343 * cy_init() is called at boot-time to initialize the serial driver.
4344 * ---------------------------------------------------------------------
4345 */
4346
dd025c0c 4347static int __devinit cy_init_card(struct cyclades_card *cinfo)
0809e267
JS		 4348{
4349 struct cyclades_port *info;
a6343afb 4350 u32 uninitialized_var(mailbox);
65f76a82 4351 unsigned int nports, port;
0809e267 4352 unsigned short chip_number;
65f76a82 4353 int uninitialized_var(index);
0809e267 4354
3046d50e
JS		 4355 spin_lock_init(&cinfo->card_lock);
4356
c2ad4c75 4357 if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
0809e267
JS		 4358 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4359 cinfo->ctl_addr)->mail_box_0);
4360 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4361 cinfo->intr_enabled = 0;
4362 cinfo->nports = 0; /* Will be correctly set later, after
4363 Z FW is loaded */
3046d50e
JS		 4364 } else {
4365 index = cinfo->bus_index;
4366 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4367 }
4368
dd025c0c
JS		 4369 cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
4370 if (cinfo->ports == NULL) {
4371 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
3137553d 4372 cinfo->nports = 0;
dd025c0c
JS		 4373 return -ENOMEM;
4374 }
4375
3046d50e
JS		 4376 for (port = cinfo->first_line; port < cinfo->first_line + nports;
4377 port++) {
dd025c0c 4378 info = &cinfo->ports[port - cinfo->first_line];
3046d50e 4379 info->magic = CYCLADES_MAGIC;
875b206b 4380 info->card = cinfo;
3046d50e
JS		 4381 info->line = port;
4382 info->flags = STD_COM_FLAGS;
4383 info->closing_wait = CLOSING_WAIT_DELAY;
4384 info->close_delay = 5 * HZ / 10;
4385
3046d50e
JS		 4386 init_waitqueue_head(&info->open_wait);
4387 init_waitqueue_head(&info->close_wait);
2c7fea99 4388 init_completion(&info->shutdown_wait);
3046d50e
JS		 4389 init_waitqueue_head(&info->delta_msr_wait);
4390
4391 if (IS_CYC_Z(*cinfo)) {
0809e267 4392 info->type = PORT_STARTECH;
0809e267
JS		 4393 if (mailbox == ZO_V1)
4394 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4395 else
3046d50e 4396 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
0809e267 4397#ifdef CONFIG_CYZ_INTR
3991428d
JS		 4398 setup_timer(&cyz_rx_full_timer[port],
4399 cyz_rx_restart, (unsigned long)info);
0809e267 4400#endif
3046d50e 4401 } else {
0809e267 4402 info->type = PORT_CIRRUS;
0809e267 4403 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
3046d50e 4404 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
0809e267
JS		 4405 info->cor2 = CyETC;
4406 info->cor3 = 0x08; /* _very_ small rcv threshold */
3046d50e 4407
0809e267 4408 chip_number = (port - cinfo->first_line) / 4;
15ed6cc0
AC		 4409 info->chip_rev = readb(cinfo->base_addr +
4410 (cy_chip_offset[chip_number] << index) +
4411 (CyGFRCR << index));
4412
4413 if (info->chip_rev >= CD1400_REV_J) {
0809e267
JS		 4414 /* It is a CD1400 rev. J or later */
4415 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4416 info->tco = baud_co_60[13]; /* Tx CO */
4417 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4418 info->rco = baud_co_60[13]; /* Rx CO */
0809e267
JS		 4419 info->rtsdtr_inv = 1;
4420 } else {
4421 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4422 info->tco = baud_co_25[13]; /* Tx CO */
4423 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4424 info->rco = baud_co_25[13]; /* Rx CO */
0809e267
JS		 4425 info->rtsdtr_inv = 0;
4426 }
3046d50e
JS		 4427 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4428 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
0809e267 4429 }
3046d50e 4430
0809e267 4431 }
3046d50e
JS		 4432
4433#ifndef CONFIG_CYZ_INTR
4434 if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4435 mod_timer(&cyz_timerlist, jiffies + 1);
4436#ifdef CY_PCI_DEBUG
4437 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4438#endif
4439 }
4440#endif
dd025c0c 4441 return 0;
0809e267
JS		 4442}
4443
1da177e4
LT		 4444/* initialize chips on Cyclom-Y card -- return number of valid
4445 chips (which is number of ports/4) */
31b4f0a1
JS		 4446static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4447 int index)
1da177e4 4448{
02f1175c
JS		 4449 unsigned int chip_number;
4450 void __iomem *base_addr;
4451
4452 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4453 /* Cy_HwReset is 0x1400 */
4454 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4455 /* Cy_ClrIntr is 0x1800 */
4456 udelay(500L);
4457
15ed6cc0
AC		 4458 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
4459 chip_number++) {
02f1175c
JS		 4460 base_addr =
4461 true_base_addr + (cy_chip_offset[chip_number] << index);
4462 mdelay(1);
db05c3b1 4463 if (readb(base_addr + (CyCCR << index)) != 0x00) {
02f1175c
JS		 4464 /*************
4465 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4466 chip_number, (unsigned long)base_addr);
4467 *************/
4468 return chip_number;
4469 }
4470
4471 cy_writeb(base_addr + (CyGFRCR << index), 0);
4472 udelay(10L);
4473
4474 /* The Cyclom-16Y does not decode address bit 9 and therefore
4475 cannot distinguish between references to chip 0 and a non-
4476 existent chip 4. If the preceding clearing of the supposed
4477 chip 4 GFRCR register appears at chip 0, there is no chip 4
4478 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4479 */
db05c3b1 4480 if (chip_number == 4 && readb(true_base_addr +
02f1175c
JS		 4481 (cy_chip_offset[0] << index) +
4482 (CyGFRCR << index)) == 0) {
4483 return chip_number;
4484 }
4485
4486 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4487 mdelay(1);
4488
db05c3b1 4489 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
02f1175c
JS		 4490 /*
4491 printk(" chip #%d at %#6lx is not responding ",
4492 chip_number, (unsigned long)base_addr);
4493 printk("(GFRCR stayed 0)\n",
4494 */
4495 return chip_number;
4496 }
db05c3b1 4497 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
02f1175c
JS		 4498 0x40) {
4499 /*
4500 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4501 "%#2x)\n",
4502 chip_number, (unsigned long)base_addr,
4503 base_addr[CyGFRCR<<index]);
4504 */
4505 return chip_number;
4506 }
4507 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
db05c3b1 4508 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
02f1175c
JS		 4509 /* It is a CD1400 rev. J or later */
4510 /* Impossible to reach 5ms with this chip.
4511 Changed to 2ms instead (f = 500 Hz). */
4512 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4513 } else {
4514 /* f = 200 Hz */
4515 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4516 }
1da177e4 4517
02f1175c
JS		 4518 /*
4519 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4520 chip_number, (unsigned long)base_addr,
db05c3b1 4521 readb(base_addr+(CyGFRCR<<index)));
02f1175c
JS		 4522 */
4523 }
4524 return chip_number;
4525} /* cyy_init_card */
1da177e4
LT		 4526
4527/*
4528 * ---------------------------------------------------------------------
4529 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4530 * sets global variables and return the number of ISA boards found.
4531 * ---------------------------------------------------------------------
4532 */
02f1175c 4533static int __init cy_detect_isa(void)
1da177e4
LT		 4534{
4535#ifdef CONFIG_ISA
02f1175c
JS		 4536 unsigned short cy_isa_irq, nboard;
4537 void __iomem *cy_isa_address;
4538 unsigned short i, j, cy_isa_nchan;
1da177e4 4539#ifdef MODULE
02f1175c 4540 int isparam = 0;
1da177e4
LT		 4541#endif
4542
02f1175c 4543 nboard = 0;
1da177e4
LT		 4544
4545#ifdef MODULE
4546 /* Check for module parameters */
02f1175c
JS		 4547 for (i = 0; i < NR_CARDS; i++) {
4548 if (maddr[i] || i) {
4549 isparam = 1;
4550 cy_isa_addresses[i] = maddr[i];
4551 }
4552 if (!maddr[i])
4553 break;
1da177e4
LT		 4554 }
4555#endif
4556
02f1175c
JS		 4557 /* scan the address table probing for Cyclom-Y/ISA boards */
4558 for (i = 0; i < NR_ISA_ADDRS; i++) {
4559 unsigned int isa_address = cy_isa_addresses[i];
15ed6cc0 4560 if (isa_address == 0x0000)
096dcfce 4561 return nboard;
1da177e4 4562
02f1175c 4563 /* probe for CD1400... */
cd989b3a 4564 cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
3137553d
JS		 4565 if (cy_isa_address == NULL) {
4566 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4567 "address\n");
4568 continue;
4569 }
02f1175c
JS		 4570 cy_isa_nchan = CyPORTS_PER_CHIP *
4571 cyy_init_card(cy_isa_address, 0);
4572 if (cy_isa_nchan == 0) {
3137553d 4573 iounmap(cy_isa_address);
02f1175c
JS		 4574 continue;
4575 }
1da177e4
LT		 4576#ifdef MODULE
4577 if (isparam && irq[i])
02f1175c 4578 cy_isa_irq = irq[i];
1da177e4
LT		 4579 else
4580#endif
02f1175c
JS		 4581 /* find out the board's irq by probing */
4582 cy_isa_irq = detect_isa_irq(cy_isa_address);
4583 if (cy_isa_irq == 0) {
21719191
JS		 4584 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4585 "IRQ could not be detected.\n",
02f1175c 4586 (unsigned long)cy_isa_address);
3137553d 4587 iounmap(cy_isa_address);
02f1175c
JS		 4588 continue;
4589 }
4590
4591 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
21719191
JS		 4592 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4593 "more channels are available. Change NR_PORTS "
4594 "in cyclades.c and recompile kernel.\n",
02f1175c 4595 (unsigned long)cy_isa_address);
3137553d 4596 iounmap(cy_isa_address);
096dcfce 4597 return nboard;
02f1175c
JS		 4598 }
4599 /* fill the next cy_card structure available */
4600 for (j = 0; j < NR_CARDS; j++) {
f7429034 4601 if (cy_card[j].base_addr == NULL)
02f1175c
JS		 4602 break;
4603 }
4604 if (j == NR_CARDS) { /* no more cy_cards available */
21719191
JS		 4605 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4606 "more cards can be used. Change NR_CARDS in "
4607 "cyclades.c and recompile kernel.\n",
02f1175c 4608 (unsigned long)cy_isa_address);
3137553d 4609 iounmap(cy_isa_address);
096dcfce 4610 return nboard;
02f1175c
JS		 4611 }
4612
4613 /* allocate IRQ */
4614 if (request_irq(cy_isa_irq, cyy_interrupt,
4615 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
21719191
JS		 4616 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4617 "could not allocate IRQ#%d.\n",
4618 (unsigned long)cy_isa_address, cy_isa_irq);
3137553d 4619 iounmap(cy_isa_address);
096dcfce 4620 return nboard;
02f1175c
JS		 4621 }
4622
4623 /* set cy_card */
4624 cy_card[j].base_addr = cy_isa_address;
4625 cy_card[j].ctl_addr = NULL;
4626 cy_card[j].irq = (int)cy_isa_irq;
4627 cy_card[j].bus_index = 0;
4628 cy_card[j].first_line = cy_next_channel;
4629 cy_card[j].num_chips = cy_isa_nchan / 4;
3137553d
JS		 4630 if (cy_init_card(&cy_card[j])) {
4631 cy_card[j].base_addr = NULL;
4632 free_irq(cy_isa_irq, &cy_card[j]);
4633 iounmap(cy_isa_address);
4634 continue;
4635 }
02f1175c
JS		 4636 nboard++;
4637
21719191
JS		 4638 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4639 "%d channels starting from port %d\n",
02f1175c
JS		 4640 j + 1, (unsigned long)cy_isa_address,
4641 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
21719191
JS		 4642 cy_isa_irq, cy_isa_nchan, cy_next_channel);
4643
6ad1ccc1
JS		 4644 for (j = cy_next_channel;
4645 j < cy_next_channel + cy_isa_nchan; j++)
4646 tty_register_device(cy_serial_driver, j, NULL);
02f1175c
JS		 4647 cy_next_channel += cy_isa_nchan;
4648 }
096dcfce 4649 return nboard;
1da177e4 4650#else
096dcfce 4651 return 0;
02f1175c
JS		 4652#endif /* CONFIG_ISA */
4653} /* cy_detect_isa */
1da177e4 4654
58936d8d 4655#ifdef CONFIG_PCI
054f5b0a
JS		 4656static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4657{
4658 unsigned int a;
4659
4660 for (a = 0; a < size && *str; a++, str++)
4661 if (*str & 0x80)
4662 return -EINVAL;
4663
4664 for (; a < size; a++, str++)
4665 if (*str)
4666 return -EINVAL;
4667
4668 return 0;
4669}
4670
f61e761e 4671static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
054f5b0a
JS		 4672 unsigned int size)
4673{
4674 for (; size > 0; size--) {
4675 cy_writel(fpga, *data++);
4676 udelay(10);
4677 }
4678}
4679
4680static void __devinit plx_init(struct pci_dev *pdev, int irq,
4681 struct RUNTIME_9060 __iomem *addr)
1da177e4 4682{
02f1175c 4683 /* Reset PLX */
054f5b0a 4684 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
02f1175c 4685 udelay(100L);
054f5b0a 4686 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
02f1175c
JS		 4687
4688 /* Reload Config. Registers from EEPROM */
054f5b0a 4689 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
02f1175c 4690 udelay(100L);
054f5b0a
JS		 4691 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4692
4693 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4694 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4695 * registers. This will remain here until we find a permanent fix.
4696 */
4697 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4698}
4699
4700static int __devinit __cyz_load_fw(const struct firmware *fw,
4701 const char *name, const u32 mailbox, void __iomem *base,
4702 void __iomem *fpga)
4703{
f61e761e
DW		 4704 const void *ptr = fw->data;
4705 const struct zfile_header *h = ptr;
4706 const struct zfile_config *c, *cs;
4707 const struct zfile_block *b, *bs;
054f5b0a
JS		 4708 unsigned int a, tmp, len = fw->size;
4709#define BAD_FW KERN_ERR "Bad firmware: "
4710 if (len < sizeof(*h)) {
4711 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4712 return -EINVAL;
4713 }
4714
4715 cs = ptr + h->config_offset;
4716 bs = ptr + h->block_offset;
4717
4718 if ((void *)(cs + h->n_config) > ptr + len ||
4719 (void *)(bs + h->n_blocks) > ptr + len) {
4720 printk(BAD_FW "too short");
4721 return -EINVAL;
4722 }
4723
4724 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4725 cyc_isfwstr(h->date, sizeof(h->date))) {
4726 printk(BAD_FW "bad formatted header string\n");
4727 return -EINVAL;
4728 }
4729
4730 if (strncmp(name, h->name, sizeof(h->name))) {
4731 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4732 return -EINVAL;
4733 }
4734
4735 tmp = 0;
4736 for (c = cs; c < cs + h->n_config; c++) {
4737 for (a = 0; a < c->n_blocks; a++)
4738 if (c->block_list[a] > h->n_blocks) {
4739 printk(BAD_FW "bad block ref number in cfgs\n");
4740 return -EINVAL;
4741 }
4742 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4743 tmp++;
4744 }
4745 if (!tmp) {
4746 printk(BAD_FW "nothing appropriate\n");
4747 return -EINVAL;
4748 }
4749
4750 for (b = bs; b < bs + h->n_blocks; b++)
4751 if (b->file_offset + b->size > len) {
4752 printk(BAD_FW "bad block data offset\n");
4753 return -EINVAL;
4754 }
4755
4756 /* everything is OK, let's seek'n'load it */
4757 for (c = cs; c < cs + h->n_config; c++)
4758 if (c->mailbox == mailbox && c->function == 0)
4759 break;
4760
4761 for (a = 0; a < c->n_blocks; a++) {
4762 b = &bs[c->block_list[a]];
4763 if (b->type == ZBLOCK_FPGA) {
4764 if (fpga != NULL)
4765 cyz_fpga_copy(fpga, ptr + b->file_offset,
4766 b->size);
4767 } else {
4768 if (base != NULL)
4769 memcpy_toio(base + b->ram_offset,
4770 ptr + b->file_offset, b->size);
4771 }
4772 }
4773#undef BAD_FW
4774 return 0;
4775}
4776
4777static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4778 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4779{
4780 const struct firmware *fw;
4781 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4782 struct CUSTOM_REG __iomem *cust = base_addr;
4783 struct ZFW_CTRL __iomem *pt_zfwctrl;
c4923b4f 4784 void __iomem *tmp;
054f5b0a
JS		 4785 u32 mailbox, status;
4786 unsigned int i;
4787 int retval;
4788
4789 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4790 if (retval) {
4791 dev_err(&pdev->dev, "can't get firmware\n");
4792 goto err;
4793 }
4794
4795 /* Check whether the firmware is already loaded and running. If
4796 positive, skip this board */
4797 if (Z_FPGA_LOADED(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
4798 u32 cntval = readl(base_addr + 0x190);
4799
4800 udelay(100);
4801 if (cntval != readl(base_addr + 0x190)) {
4802 /* FW counter is working, FW is running */
4803 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4804 "Skipping board.\n");
4805 retval = 0;
4806 goto err_rel;
4807 }
4808 }
4809
4810 /* start boot */
4811 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4812 ~0x00030800UL);
4813
4814 mailbox = readl(&ctl_addr->mail_box_0);
4815
4816 if (mailbox == 0 || Z_FPGA_LOADED(ctl_addr)) {
4817 /* stops CPU and set window to beginning of RAM */
4818 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4819 cy_writel(&cust->cpu_stop, 0);
4820 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4821 udelay(100);
4822 }
4823
4824 plx_init(pdev, irq, ctl_addr);
4825
4826 if (mailbox != 0) {
4827 /* load FPGA */
4828 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4829 base_addr);
4830 if (retval)
4831 goto err_rel;
4832 if (!Z_FPGA_LOADED(ctl_addr)) {
4833 dev_err(&pdev->dev, "fw upload successful, but fw is "
4834 "not loaded\n");
4835 goto err_rel;
4836 }
4837 }
4838
4839 /* stops CPU and set window to beginning of RAM */
4840 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4841 cy_writel(&cust->cpu_stop, 0);
4842 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4843 udelay(100);
4844
4845 /* clear memory */
c4923b4f 4846 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
054f5b0a
JS		 4847 cy_writeb(tmp, 255);
4848 if (mailbox != 0) {
4849 /* set window to last 512K of RAM */
4850 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
c4923b4f 4851 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
054f5b0a
JS		 4852 cy_writeb(tmp, 255);
4853 /* set window to beginning of RAM */
4854 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
054f5b0a
JS		 4855 }
4856
4857 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4858 release_firmware(fw);
4859 if (retval)
4860 goto err;
4861
4862 /* finish boot and start boards */
4863 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4864 cy_writel(&cust->cpu_start, 0);
4865 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4866 i = 0;
4867 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4868 msleep(100);
4869 if (status != ZFIRM_ID) {
4870 if (status == ZFIRM_HLT) {
4871 dev_err(&pdev->dev, "you need an external power supply "
4872 "for this number of ports. Firmware halted and "
4873 "board reset.\n");
4874 retval = -EIO;
4875 goto err;
4876 }
4877 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4878 "some more time\n", status);
4879 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
4880 i++ < 200)
4881 msleep(100);
4882 if (status != ZFIRM_ID) {
4883 dev_err(&pdev->dev, "Board not started in 20 seconds! "
4884 "Giving up. (fid->signature = 0x%x)\n",
4885 status);
4886 dev_info(&pdev->dev, "*** Warning ***: if you are "
4887 "upgrading the FW, please power cycle the "
4888 "system before loading the new FW to the "
4889 "Cyclades-Z.\n");
4890
4891 if (Z_FPGA_LOADED(ctl_addr))
4892 plx_init(pdev, irq, ctl_addr);
4893
4894 retval = -EIO;
4895 goto err;
4896 }
4897 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
4898 i / 10);
4899 }
4900 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
4901
4902 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
4903 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
4904 base_addr + readl(&fid->zfwctrl_addr));
4905
4906 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
4907 readl(&pt_zfwctrl->board_ctrl.fw_version),
4908 readl(&pt_zfwctrl->board_ctrl.n_channel));
4909
4910 if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) {
4911 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
4912 "check the connection between the Z host card and the "
4913 "serial expanders.\n");
4914
4915 if (Z_FPGA_LOADED(ctl_addr))
4916 plx_init(pdev, irq, ctl_addr);
4917
4918 dev_info(&pdev->dev, "Null number of ports detected. Board "
4919 "reset.\n");
4920 retval = 0;
4921 goto err;
4922 }
4923
4924 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
4925 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
4926
4927 /*
4928 Early firmware failed to start looking for commands.
4929 This enables firmware interrupts for those commands.
4930 */
4931 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4932 (1 << 17));
4933 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4934 0x00030800UL);
4935
4936 plx_init(pdev, irq, ctl_addr);
4937
4938 return 0;
4939err_rel:
4940 release_firmware(fw);
4941err:
4942 return retval;
1da177e4
LT		 4943}
4944
58936d8d
JS		 4945static int __devinit cy_pci_probe(struct pci_dev *pdev,
4946 const struct pci_device_id *ent)
1da177e4 4947{
3137553d
JS		 4948 void __iomem *addr0 = NULL, *addr2 = NULL;
4949 char *card_name = NULL;
4950 u32 mailbox;
4951 unsigned int device_id, nchan = 0, card_no, i;
4952 unsigned char plx_ver;
4953 int retval, irq;
02f1175c 4954
58936d8d
JS		 4955 retval = pci_enable_device(pdev);
4956 if (retval) {
4957 dev_err(&pdev->dev, "cannot enable device\n");
3137553d 4958 goto err;
58936d8d 4959 }
1da177e4 4960
58936d8d 4961 /* read PCI configuration area */
3137553d 4962 irq = pdev->irq;
58936d8d 4963 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
1da177e4 4964
3137553d
JS		 4965#if defined(__alpha__)
4966 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4967 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
4968 "addresses on Alpha systems.\n");
4969 retval = -EIO;
4970 goto err_dis;
4971 }
4972#endif
4973 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4974 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
4975 "addresses\n");
4976 retval = -EIO;
4977 goto err_dis;
4978 }
4979
4980 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4981 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
4982 "it...\n");
4983 pdev->resource[2].flags &= ~IORESOURCE_IO;
4984 }
4985
4986 retval = pci_request_regions(pdev, "cyclades");
4987 if (retval) {
4988 dev_err(&pdev->dev, "failed to reserve resources\n");
4989 goto err_dis;
4990 }
4991
4992 retval = -EIO;
58936d8d
JS		 4993 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4994 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3137553d 4995 card_name = "Cyclom-Y";
1da177e4 4996
3137553d
JS		 4997 addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
4998 if (addr0 == NULL) {
4999 dev_err(&pdev->dev, "can't remap ctl region\n");
5000 goto err_reg;
58936d8d 5001 }
3137553d
JS		 5002 addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
5003 if (addr2 == NULL) {
5004 dev_err(&pdev->dev, "can't remap base region\n");
5005 goto err_unmap;
58936d8d 5006 }
1da177e4 5007
3137553d
JS		 5008 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
5009 if (nchan == 0) {
21719191
JS		 5010 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
5011 "Serial-Modules\n");
58936d8d
JS		 5012 return -EIO;
5013 }
58936d8d 5014 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
3137553d 5015 struct RUNTIME_9060 __iomem *ctl_addr;
21719191 5016
3137553d
JS		 5017 ctl_addr = addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
5018 if (addr0 == NULL) {
5019 dev_err(&pdev->dev, "can't remap ctl region\n");
5020 goto err_reg;
5021 }
58936d8d
JS		 5022
5023 /* Disable interrupts on the PLX before resetting it */
054f5b0a 5024 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900);
58936d8d 5025
054f5b0a 5026 plx_init(pdev, irq, addr0);
02f1175c 5027
3137553d 5028 mailbox = (u32)readl(&ctl_addr->mail_box_0);
58936d8d 5029
3137553d
JS		 5030 addr2 = pci_iomap(pdev, 2, mailbox == ZE_V1 ?
5031 CyPCI_Ze_win : CyPCI_Zwin);
5032 if (addr2 == NULL) {
5033 dev_err(&pdev->dev, "can't remap base region\n");
5034 goto err_unmap;
58936d8d
JS		 5035 }
5036
5037 if (mailbox == ZE_V1) {
3137553d
JS		 5038 card_name = "Cyclades-Ze";
5039
5040 readl(&ctl_addr->mail_box_0);
5041 nchan = ZE_V1_NPORTS;
58936d8d 5042 } else {
3137553d 5043 card_name = "Cyclades-8Zo";
1da177e4
LT		 5044
5045#ifdef CY_PCI_DEBUG
3137553d
JS		 5046 if (mailbox == ZO_V1) {
5047 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5048 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5049 "id %lx, ver %lx\n", (ulong)(0xff &
5050 readl(&((struct CUSTOM_REG *)addr2)->
5051 fpga_id)), (ulong)(0xff &
5052 readl(&((struct CUSTOM_REG *)addr2)->
5053 fpga_version)));
5054 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5055 } else {
5056 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5057 "Cyclades-Z board. FPGA not loaded\n");
5058 }
1da177e4 5059#endif
3137553d
JS		 5060 /* The following clears the firmware id word. This
5061 ensures that the driver will not attempt to talk to
5062 the board until it has been properly initialized.
5063 */
5064 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5065 cy_writel(addr2 + ID_ADDRESS, 0L);
1da177e4 5066
054f5b0a
JS		 5067 retval = cyz_load_fw(pdev, addr2, addr0, irq);
5068 if (retval)
5069 goto err_unmap;
3137553d
JS		 5070 /* This must be a Cyclades-8Zo/PCI. The extendable
5071 version will have a different device_id and will
5072 be allocated its maximum number of ports. */
5073 nchan = 8;
58936d8d 5074 }
3137553d
JS		 5075 }
5076
5077 if ((cy_next_channel + nchan) > NR_PORTS) {
5078 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5079 "channels are available. Change NR_PORTS in "
5080 "cyclades.c and recompile kernel.\n");
5081 goto err_unmap;
5082 }
5083 /* fill the next cy_card structure available */
5084 for (card_no = 0; card_no < NR_CARDS; card_no++) {
5085 if (cy_card[card_no].base_addr == NULL)
5086 break;
5087 }
5088 if (card_no == NR_CARDS) { /* no more cy_cards available */
5089 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5090 "more cards can be used. Change NR_CARDS in "
5091 "cyclades.c and recompile kernel.\n");
5092 goto err_unmap;
5093 }
5094
5095 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5096 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5097 /* allocate IRQ */
5098 retval = request_irq(irq, cyy_interrupt,
5099 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5100 if (retval) {
5101 dev_err(&pdev->dev, "could not allocate IRQ\n");
5102 goto err_unmap;
58936d8d 5103 }
3137553d
JS		 5104 cy_card[card_no].num_chips = nchan / 4;
5105 } else {
02f1175c 5106#ifdef CONFIG_CYZ_INTR
58936d8d 5107 /* allocate IRQ only if board has an IRQ */
3137553d
JS		 5108 if (irq != 0 && irq != 255) {
5109 retval = request_irq(irq, cyz_interrupt,
58936d8d 5110 IRQF_SHARED, "Cyclades-Z",
3137553d 5111 &cy_card[card_no]);
58936d8d 5112 if (retval) {
21719191 5113 dev_err(&pdev->dev, "could not allocate IRQ\n");
3137553d 5114 goto err_unmap;
02f1175c 5115 }
58936d8d 5116 }
02f1175c 5117#endif /* CONFIG_CYZ_INTR */
65f76a82 5118 cy_card[card_no].num_chips = (unsigned int)-1;
3137553d 5119 }
02f1175c 5120
3137553d
JS		 5121 /* set cy_card */
5122 cy_card[card_no].base_addr = addr2;
5123 cy_card[card_no].ctl_addr = addr0;
5124 cy_card[card_no].irq = irq;
5125 cy_card[card_no].bus_index = 1;
5126 cy_card[card_no].first_line = cy_next_channel;
5127 retval = cy_init_card(&cy_card[card_no]);
5128 if (retval)
5129 goto err_null;
58936d8d 5130
3137553d 5131 pci_set_drvdata(pdev, &cy_card[card_no]);
58936d8d 5132
3137553d
JS		 5133 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5134 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5135 /* enable interrupts in the PCI interface */
5136 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
5137 switch (plx_ver) {
5138 case PLX_9050:
5139
5140 cy_writeb(addr0 + 0x4c, 0x43);
5141 break;
5142
5143 case PLX_9060:
5144 case PLX_9080:
5145 default: /* Old boards, use PLX_9060 */
054f5b0a 5146 plx_init(pdev, irq, addr0);
3137553d
JS		 5147 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900);
5148 break;
5149 }
58936d8d
JS		 5150 }
5151
3137553d
JS		 5152 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5153 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5154 for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5155 tty_register_device(cy_serial_driver, i, &pdev->dev);
5156 cy_next_channel += nchan;
5157
58936d8d 5158 return 0;
3137553d
JS		 5159err_null:
5160 cy_card[card_no].base_addr = NULL;
5161 free_irq(irq, &cy_card[card_no]);
5162err_unmap:
5163 pci_iounmap(pdev, addr0);
5164 if (addr2)
5165 pci_iounmap(pdev, addr2);
5166err_reg:
5167 pci_release_regions(pdev);
5168err_dis:
5169 pci_disable_device(pdev);
5170err:
5171 return retval;
58936d8d 5172}
58936d8d 5173
6747cd93 5174static void __devexit cy_pci_remove(struct pci_dev *pdev)
58936d8d 5175{
38d09093 5176 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
f3851e73 5177 unsigned int i;
38d09093 5178
85c93fa9 5179 /* non-Z with old PLX */
c2ad4c75
JS		 5180 if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5181 PLX_9050)
85c93fa9
JS		 5182 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5183 else
5184#ifndef CONFIG_CYZ_INTR
c2ad4c75 5185 if (!IS_CYC_Z(*cinfo))
85c93fa9
JS		 5186#endif
5187 cy_writew(cinfo->ctl_addr + 0x68,
5188 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5189
38d09093
JS		 5190 pci_iounmap(pdev, cinfo->base_addr);
5191 if (cinfo->ctl_addr)
5192 pci_iounmap(pdev, cinfo->ctl_addr);
5193 if (cinfo->irq
5194#ifndef CONFIG_CYZ_INTR
c2ad4c75 5195 && !IS_CYC_Z(*cinfo)
38d09093
JS		 5196#endif /* CONFIG_CYZ_INTR */
5197 )
5198 free_irq(cinfo->irq, cinfo);
5199 pci_release_regions(pdev);
5200
5201 cinfo->base_addr = NULL;
6ad1ccc1
JS		 5202 for (i = cinfo->first_line; i < cinfo->first_line +
5203 cinfo->nports; i++)
5204 tty_unregister_device(cy_serial_driver, i);
dd025c0c
JS		 5205 cinfo->nports = 0;
5206 kfree(cinfo->ports);
38d09093
JS		 5207}
5208
6747cd93
JS		 5209static struct pci_driver cy_pci_driver = {
5210 .name = "cyclades",
5211 .id_table = cy_pci_dev_id,
5212 .probe = cy_pci_probe,
5213 .remove = __devexit_p(cy_pci_remove)
5214};
5215#endif
5216
02f1175c 5217static int
1da177e4 5218cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
02f1175c 5219 int *eof, void *data)
1da177e4 5220{
02f1175c 5221 struct cyclades_port *info;
dd025c0c 5222 unsigned int i, j;
02f1175c
JS		 5223 int len = 0;
5224 off_t begin = 0;
5225 off_t pos = 0;
5226 int size;
5227 __u32 cur_jifs = jiffies;
5228
5229 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5230 "IdleIn Overruns Ldisc\n");
5231
5232 pos += size;
1da177e4 5233 len += size;
1da177e4 5234
02f1175c 5235 /* Output one line for each known port */
dd025c0c
JS		 5236 for (i = 0; i < NR_CARDS; i++)
5237 for (j = 0; j < cy_card[i].nports; j++) {
5238 info = &cy_card[i].ports[j];
5239
5240 if (info->count)
5241 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5242 "%10lu %8lu %9lu %6ld\n", info->line,
5243 (cur_jifs - info->idle_stats.in_use) /
5244 HZ, info->idle_stats.xmit_bytes,
5245 (cur_jifs - info->idle_stats.xmit_idle)/
5246 HZ, info->idle_stats.recv_bytes,
5247 (cur_jifs - info->idle_stats.recv_idle)/
5248 HZ, info->idle_stats.overruns,
a352def2
AC		 5249 /* FIXME: double check locking */
5250 (long)info->tty->ldisc.ops->num);
dd025c0c
JS		 5251 else
5252 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5253 "%10lu %8lu %9lu %6ld\n",
5254 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5255 len += size;
5256 pos = begin + len;
5257
5258 if (pos < offset) {
5259 len = 0;
5260 begin = pos;
5261 }
5262 if (pos > offset + length)
5263 goto done;
02f1175c 5264 }
02f1175c 5265 *eof = 1;
1da177e4 5266done:
02f1175c
JS		 5267 *start = buf + (offset - begin); /* Start of wanted data */
5268 len -= (offset - begin); /* Start slop */
5269 if (len > length)
5270 len = length; /* Ending slop */
5271 if (len < 0)
5272 len = 0;
5273 return len;
1da177e4
LT		 5274}
5275
5276/* The serial driver boot-time initialization code!
5277 Hardware I/O ports are mapped to character special devices on a
5278 first found, first allocated manner. That is, this code searches
5279 for Cyclom cards in the system. As each is found, it is probed
5280 to discover how many chips (and thus how many ports) are present.
5281 These ports are mapped to the tty ports 32 and upward in monotonic
5282 fashion. If an 8-port card is replaced with a 16-port card, the
5283 port mapping on a following card will shift.
5284
5285 This approach is different from what is used in the other serial
5286 device driver because the Cyclom is more properly a multiplexer,
5287 not just an aggregation of serial ports on one card.
5288
5289 If there are more cards with more ports than have been
5290 statically allocated above, a warning is printed and the
5291 extra ports are ignored.
5292 */
5293
b68e31d0 5294static const struct tty_operations cy_ops = {
02f1175c
JS		 5295 .open = cy_open,
5296 .close = cy_close,
5297 .write = cy_write,
5298 .put_char = cy_put_char,
5299 .flush_chars = cy_flush_chars,
5300 .write_room = cy_write_room,
5301 .chars_in_buffer = cy_chars_in_buffer,
5302 .flush_buffer = cy_flush_buffer,
5303 .ioctl = cy_ioctl,
5304 .throttle = cy_throttle,
5305 .unthrottle = cy_unthrottle,
5306 .set_termios = cy_set_termios,
5307 .stop = cy_stop,
5308 .start = cy_start,
5309 .hangup = cy_hangup,
5310 .break_ctl = cy_break,
5311 .wait_until_sent = cy_wait_until_sent,
5312 .read_proc = cyclades_get_proc_info,
5313 .tiocmget = cy_tiocmget,
5314 .tiocmset = cy_tiocmset,
1da177e4
LT		 5315};
5316
02f1175c 5317static int __init cy_init(void)
1da177e4 5318{
dd025c0c 5319 unsigned int nboards;
9dacf3b2 5320 int retval = -ENOMEM;
02f1175c
JS		 5321
5322 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5323 if (!cy_serial_driver)
9dacf3b2 5324 goto err;
21719191
JS		 5325
5326 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5327 __DATE__, __TIME__);
02f1175c
JS		 5328
5329 /* Initialize the tty_driver structure */
5330
5331 cy_serial_driver->owner = THIS_MODULE;
5332 cy_serial_driver->driver_name = "cyclades";
5333 cy_serial_driver->name = "ttyC";
5334 cy_serial_driver->major = CYCLADES_MAJOR;
5335 cy_serial_driver->minor_start = 0;
5336 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5337 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5338 cy_serial_driver->init_termios = tty_std_termios;
5339 cy_serial_driver->init_termios.c_cflag =
5340 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
6ad1ccc1 5341 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
02f1175c
JS		 5342 tty_set_operations(cy_serial_driver, &cy_ops);
5343
9dacf3b2
JS		 5344 retval = tty_register_driver(cy_serial_driver);
5345 if (retval) {
5346 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5347 goto err_frtty;
5348 }
02f1175c 5349
02f1175c
JS		 5350 /* the code below is responsible to find the boards. Each different
5351 type of board has its own detection routine. If a board is found,
5352 the next cy_card structure available is set by the detection
5353 routine. These functions are responsible for checking the
5354 availability of cy_card and cy_port data structures and updating
5355 the cy_next_channel. */
5356
5357 /* look for isa boards */
14a55a67 5358 nboards = cy_detect_isa();
02f1175c 5359
6747cd93 5360#ifdef CONFIG_PCI
02f1175c 5361 /* look for pci boards */
6747cd93 5362 retval = pci_register_driver(&cy_pci_driver);
d941ea7d
JJ		 5363 if (retval && !nboards) {
5364 tty_unregister_driver(cy_serial_driver);
5365 goto err_frtty;
5366 }
6747cd93 5367#endif
9dacf3b2
JS		 5368
5369 return 0;
9dacf3b2
JS		 5370err_frtty:
5371 put_tty_driver(cy_serial_driver);
5372err:
5373 return retval;
02f1175c 5374} /* cy_init */
1da177e4 5375
02f1175c 5376static void __exit cy_cleanup_module(void)
1da177e4 5377{
dd025c0c 5378 struct cyclades_card *card;
65f76a82 5379 unsigned int i, e1;
1da177e4
LT		 5380
5381#ifndef CONFIG_CYZ_INTR
b7050906 5382 del_timer_sync(&cyz_timerlist);
1da177e4
LT		 5383#endif /* CONFIG_CYZ_INTR */
5384
15ed6cc0
AC		 5385 e1 = tty_unregister_driver(cy_serial_driver);
5386 if (e1)
21719191
JS		 5387 printk(KERN_ERR "failed to unregister Cyclades serial "
5388 "driver(%d)\n", e1);
1da177e4 5389
6747cd93
JS		 5390#ifdef CONFIG_PCI
5391 pci_unregister_driver(&cy_pci_driver);
5392#endif
5393
02f1175c 5394 for (i = 0; i < NR_CARDS; i++) {
dd025c0c
JS		 5395 card = &cy_card[i];
5396 if (card->base_addr) {
85c93fa9 5397 /* clear interrupt */
dd025c0c
JS		 5398 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5399 iounmap(card->base_addr);
5400 if (card->ctl_addr)
5401 iounmap(card->ctl_addr);
5402 if (card->irq
1da177e4 5403#ifndef CONFIG_CYZ_INTR
dd025c0c 5404 && !IS_CYC_Z(*card)
1da177e4 5405#endif /* CONFIG_CYZ_INTR */
02f1175c 5406 )
dd025c0c 5407 free_irq(card->irq, card);
65f76a82 5408 for (e1 = card->first_line; e1 < card->first_line +
dd025c0c 5409 card->nports; e1++)
6ad1ccc1 5410 tty_unregister_device(cy_serial_driver, e1);
dd025c0c 5411 kfree(card->ports);
02f1175c
JS		 5412 }
5413 }
f2462bfe
JS		 5414
5415 put_tty_driver(cy_serial_driver);
1da177e4
LT		 5416} /* cy_cleanup_module */
5417
5418module_init(cy_init);
5419module_exit(cy_cleanup_module);
5420
5421MODULE_LICENSE("GPL");
c8e1693a 5422MODULE_VERSION(CY_VERSION);
Linux 6.x block layer and io_uring tree(s)