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tty: cyclades, remove typedefs
[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>
9f56fad7 649#include <linux/device.h>
1da177e4
LT		 650
651#include <asm/system.h>
15ed6cc0 652#include <linux/io.h>
1da177e4 653#include <asm/irq.h>
15ed6cc0 654#include <linux/uaccess.h>
1da177e4 655
1da177e4
LT		 656#include <linux/kernel.h>
657#include <linux/pci.h>
658
659#include <linux/stat.h>
660#include <linux/proc_fs.h>
444697d6 661#include <linux/seq_file.h>
1da177e4 662
02f1175c
JS		 663static void cy_throttle(struct tty_struct *tty);
664static void cy_send_xchar(struct tty_struct *tty, char ch);
1da177e4 665
1da177e4
LT		 666#ifndef SERIAL_XMIT_SIZE
667#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
668#endif
669#define WAKEUP_CHARS 256
670
671#define STD_COM_FLAGS (0)
672
054f5b0a
JS		 673/* firmware stuff */
674#define ZL_MAX_BLOCKS 16
675#define DRIVER_VERSION 0x02010203
676#define RAM_SIZE 0x80000
677
054f5b0a
JS		 678enum zblock_type {
679 ZBLOCK_PRG = 0,
680 ZBLOCK_FPGA = 1
681};
682
683struct zfile_header {
684 char name[64];
685 char date[32];
686 char aux[32];
687 u32 n_config;
688 u32 config_offset;
689 u32 n_blocks;
690 u32 block_offset;
691 u32 reserved[9];
692} __attribute__ ((packed));
693
694struct zfile_config {
695 char name[64];
696 u32 mailbox;
697 u32 function;
698 u32 n_blocks;
699 u32 block_list[ZL_MAX_BLOCKS];
700} __attribute__ ((packed));
701
702struct zfile_block {
703 u32 type;
704 u32 file_offset;
705 u32 ram_offset;
706 u32 size;
707} __attribute__ ((packed));
708
1da177e4
LT		 709static struct tty_driver *cy_serial_driver;
710
711#ifdef CONFIG_ISA
712/* This is the address lookup table. The driver will probe for
713 Cyclom-Y/ISA boards at all addresses in here. If you want the
714 driver to probe addresses at a different address, add it to
715 this table. If the driver is probing some other board and
716 causing problems, remove the offending address from this table.
1da177e4
LT		 717*/
718
719static unsigned int cy_isa_addresses[] = {
02f1175c
JS		 720 0xD0000,
721 0xD2000,
722 0xD4000,
723 0xD6000,
724 0xD8000,
725 0xDA000,
726 0xDC000,
727 0xDE000,
728 0, 0, 0, 0, 0, 0, 0, 0
1da177e4 729};
02f1175c 730
fe971071 731#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
1da177e4
LT		 732
733#ifdef MODULE
3046d50e
JS		 734static long maddr[NR_CARDS];
735static int irq[NR_CARDS];
1da177e4
LT		 736
737module_param_array(maddr, long, NULL, 0);
738module_param_array(irq, int, NULL, 0);
739#endif
740
02f1175c 741#endif /* CONFIG_ISA */
1da177e4
LT		 742
743/* This is the per-card data structure containing address, irq, number of
744 channels, etc. This driver supports a maximum of NR_CARDS cards.
745*/
746static struct cyclades_card cy_card[NR_CARDS];
747
02f1175c 748static int cy_next_channel; /* next minor available */
1da177e4 749
1da177e4
LT		 750/*
751 * This is used to look up the divisor speeds and the timeouts
752 * We're normally limited to 15 distinct baud rates. The extra
77451e53 753 * are accessed via settings in info->port.flags.
1da177e4
LT		 754 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
755 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
756 * HI VHI
757 * 20
758 */
759static int baud_table[] = {
02f1175c
JS		 760 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
761 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
762 230400, 0
763};
764
765static char baud_co_25[] = { /* 25 MHz clock option table */
766 /* value => 00 01 02 03 04 */
767 /* divide by 8 32 128 512 2048 */
768 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
769 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
770};
771
772static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
773 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
774 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
775};
776
777static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
778 /* value => 00 01 02 03 04 */
779 /* divide by 8 32 128 512 2048 */
780 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
781 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
782 0x00
783};
784
785static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
786 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
787 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
788 0x21
789};
790
791static char baud_cor3[] = { /* receive threshold */
792 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
793 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
794 0x07
795};
1da177e4
LT		 796
797/*
798 * The Cyclades driver implements HW flow control as any serial driver.
15ed6cc0
AC		 799 * The cyclades_port structure member rflow and the vector rflow_thr
800 * allows us to take advantage of a special feature in the CD1400 to avoid
801 * data loss even when the system interrupt latency is too high. These flags
802 * are to be used only with very special applications. Setting these flags
803 * requires the use of a special cable (DTR and RTS reversed). In the new
804 * CD1400-based boards (rev. 6.00 or later), there is no need for special
1da177e4
LT		 805 * cables.
806 */
807
02f1175c
JS		 808static char rflow_thr[] = { /* rflow threshold */
809 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
810 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
811 0x0a
812};
1da177e4
LT		 813
814/* The Cyclom-Ye has placed the sequential chips in non-sequential
815 * address order. This look-up table overcomes that problem.
816 */
02f1175c
JS		 817static int cy_chip_offset[] = { 0x0000,
818 0x0400,
819 0x0800,
820 0x0C00,
821 0x0200,
822 0x0600,
823 0x0A00,
824 0x0E00
825};
1da177e4
LT		 826
827/* PCI related definitions */
828
1da177e4 829#ifdef CONFIG_PCI
893de2df 830static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
15ed6cc0
AC		 831 /* PCI < 1Mb */
832 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
833 /* PCI > 1Mb */
834 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
835 /* 4Y PCI < 1Mb */
836 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
837 /* 4Y PCI > 1Mb */
838 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
839 /* 8Y PCI < 1Mb */
840 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
841 /* 8Y PCI > 1Mb */
842 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
843 /* Z PCI < 1Mb */
844 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
845 /* Z PCI > 1Mb */
846 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
893de2df 847 { } /* end of table */
02f1175c 848};
893de2df 849MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
1da177e4
LT		 850#endif
851
852static void cy_start(struct tty_struct *);
853static void set_line_char(struct cyclades_port *);
1a86b5e3 854static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
1da177e4
LT		 855#ifdef CONFIG_ISA
856static unsigned detect_isa_irq(void __iomem *);
02f1175c 857#endif /* CONFIG_ISA */
1da177e4 858
1da177e4
LT		 859#ifndef CONFIG_CYZ_INTR
860static void cyz_poll(unsigned long);
861
862/* The Cyclades-Z polling cycle is defined by this variable */
863static long cyz_polling_cycle = CZ_DEF_POLL;
864
8d06afab 865static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
1da177e4 866
02f1175c 867#else /* CONFIG_CYZ_INTR */
1da177e4
LT		 868static void cyz_rx_restart(unsigned long);
869static struct timer_list cyz_rx_full_timer[NR_PORTS];
02f1175c 870#endif /* CONFIG_CYZ_INTR */
1da177e4 871
2693f485
JS		 872static inline bool cy_is_Z(struct cyclades_card *card)
873{
874 return card->num_chips == (unsigned int)-1;
875}
876
877static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem *ctl_addr)
878{
879 return readl(&ctl_addr->init_ctrl) & (1 << 17);
880}
881
882static inline bool cyz_fpga_loaded(struct cyclades_card *card)
883{
884 return __cyz_fpga_loaded(card->ctl_addr.p9060);
885}
886
887static inline bool cyz_is_loaded(struct cyclades_card *card)
888{
889 struct FIRM_ID __iomem *fw_id = card->base_addr + ID_ADDRESS;
890
891 return (card->hw_ver == ZO_V1 || cyz_fpga_loaded(card)) &&
892 readl(&fw_id->signature) == ZFIRM_ID;
893}
894
02f1175c
JS		 895static inline int serial_paranoia_check(struct cyclades_port *info,
896 char *name, const char *routine)
1da177e4
LT		 897{
898#ifdef SERIAL_PARANOIA_CHECK
02f1175c 899 if (!info) {
21719191
JS		 900 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
901 "in %s\n", name, routine);
02f1175c
JS		 902 return 1;
903 }
904
02f1175c 905 if (info->magic != CYCLADES_MAGIC) {
21719191
JS		 906 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
907 "struct (%s) in %s\n", name, routine);
02f1175c
JS		 908 return 1;
909 }
1da177e4 910#endif
02f1175c
JS		 911 return 0;
912} /* serial_paranoia_check */
1da177e4 913
1da177e4
LT		 914/***********************************************************/
915/********* Start of block of Cyclom-Y specific code ********/
916
917/* This routine waits up to 1000 micro-seconds for the previous
918 command to the Cirrus chip to complete and then issues the
919 new command. An error is returned if the previous command
920 didn't finish within the time limit.
921
922 This function is only called from inside spinlock-protected code.
923 */
15ed6cc0 924static int cyy_issue_cmd(void __iomem *base_addr, u_char cmd, int index)
1da177e4 925{
ad39c300 926 unsigned int i;
1da177e4 927
02f1175c
JS		 928 /* Check to see that the previous command has completed */
929 for (i = 0; i < 100; i++) {
15ed6cc0 930 if (readb(base_addr + (CyCCR << index)) == 0)
02f1175c 931 break;
02f1175c 932 udelay(10L);
1da177e4 933 }
02f1175c
JS		 934 /* if the CCR never cleared, the previous command
935 didn't finish within the "reasonable time" */
936 if (i == 100)
096dcfce 937 return -1;
1da177e4 938
02f1175c
JS		 939 /* Issue the new command */
940 cy_writeb(base_addr + (CyCCR << index), cmd);
1da177e4 941
096dcfce 942 return 0;
02f1175c 943} /* cyy_issue_cmd */
1da177e4
LT		 944
945#ifdef CONFIG_ISA
946/* ISA interrupt detection code */
15ed6cc0 947static unsigned detect_isa_irq(void __iomem *address)
1da177e4 948{
02f1175c
JS		 949 int irq;
950 unsigned long irqs, flags;
951 int save_xir, save_car;
952 int index = 0; /* IRQ probing is only for ISA */
953
954 /* forget possible initially masked and pending IRQ */
955 irq = probe_irq_off(probe_irq_on());
956
957 /* Clear interrupts on the board first */
958 cy_writeb(address + (Cy_ClrIntr << index), 0);
959 /* Cy_ClrIntr is 0x1800 */
960
961 irqs = probe_irq_on();
962 /* Wait ... */
963 udelay(5000L);
964
965 /* Enable the Tx interrupts on the CD1400 */
966 local_irq_save(flags);
967 cy_writeb(address + (CyCAR << index), 0);
968 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
969
970 cy_writeb(address + (CyCAR << index), 0);
971 cy_writeb(address + (CySRER << index),
db05c3b1 972 readb(address + (CySRER << index)) | CyTxRdy);
02f1175c
JS		 973 local_irq_restore(flags);
974
975 /* Wait ... */
976 udelay(5000L);
977
978 /* Check which interrupt is in use */
979 irq = probe_irq_off(irqs);
980
981 /* Clean up */
db05c3b1
JS		 982 save_xir = (u_char) readb(address + (CyTIR << index));
983 save_car = readb(address + (CyCAR << index));
02f1175c
JS		 984 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
985 cy_writeb(address + (CySRER << index),
db05c3b1 986 readb(address + (CySRER << index)) & ~CyTxRdy);
02f1175c
JS		 987 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
988 cy_writeb(address + (CyCAR << index), (save_car));
989 cy_writeb(address + (Cy_ClrIntr << index), 0);
990 /* Cy_ClrIntr is 0x1800 */
991
992 return (irq > 0) ? irq : 0;
1da177e4 993}
02f1175c 994#endif /* CONFIG_ISA */
1da177e4 995
ce97a097
JS		 996static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
997 void __iomem *base_addr)
e941027f
JS		 998{
999 struct cyclades_port *info;
1000 struct tty_struct *tty;
65f76a82
JS		 1001 int len, index = cinfo->bus_index;
1002 u8 save_xir, channel, save_car, data, char_count;
e941027f 1003
e941027f 1004#ifdef CY_DEBUG_INTERRUPTS
ce97a097 1005 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
e941027f 1006#endif
ce97a097 1007 /* determine the channel & change to that context */
65f76a82
JS		 1008 save_xir = readb(base_addr + (CyRIR << index));
1009 channel = save_xir & CyIRChannel;
ce97a097
JS		 1010 info = &cinfo->ports[channel + chip * 4];
1011 save_car = readb(base_addr + (CyCAR << index));
1012 cy_writeb(base_addr + (CyCAR << index), save_xir);
1013
1014 /* if there is nowhere to put the data, discard it */
77451e53 1015 if (info->port.tty == NULL) {
65f76a82
JS		 1016 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1017 CyIVRRxEx) { /* exception */
ce97a097
JS		 1018 data = readb(base_addr + (CyRDSR << index));
1019 } else { /* normal character reception */
1020 char_count = readb(base_addr + (CyRDCR << index));
1021 while (char_count--)
db05c3b1 1022 data = readb(base_addr + (CyRDSR << index));
ce97a097
JS		 1023 }
1024 goto end;
1025 }
1026 /* there is an open port for this data */
77451e53 1027 tty = info->port.tty;
65f76a82
JS		 1028 if ((readb(base_addr + (CyRIVR << index)) & CyIVRMask) ==
1029 CyIVRRxEx) { /* exception */
ce97a097
JS		 1030 data = readb(base_addr + (CyRDSR << index));
1031
1032 /* For statistics only */
1033 if (data & CyBREAK)
1034 info->icount.brk++;
1035 else if (data & CyFRAME)
1036 info->icount.frame++;
1037 else if (data & CyPARITY)
1038 info->icount.parity++;
1039 else if (data & CyOVERRUN)
1040 info->icount.overrun++;
1041
1042 if (data & info->ignore_status_mask) {
1043 info->icount.rx++;
ce97a097
JS		 1044 return;
1045 }
1046 if (tty_buffer_request_room(tty, 1)) {
1047 if (data & info->read_status_mask) {
1048 if (data & CyBREAK) {
1049 tty_insert_flip_char(tty,
1050 readb(base_addr + (CyRDSR <<
1051 index)), TTY_BREAK);
1052 info->icount.rx++;
77451e53 1053 if (info->port.flags & ASYNC_SAK)
ce97a097
JS		 1054 do_SAK(tty);
1055 } else if (data & CyFRAME) {
15ed6cc0 1056 tty_insert_flip_char(tty,
ce97a097
JS		 1057 readb(base_addr + (CyRDSR <<
1058 index)), TTY_FRAME);
1059 info->icount.rx++;
1060 info->idle_stats.frame_errs++;
1061 } else if (data & CyPARITY) {
1062 /* Pieces of seven... */
1063 tty_insert_flip_char(tty,
1064 readb(base_addr + (CyRDSR <<
1065 index)), TTY_PARITY);
1066 info->icount.rx++;
1067 info->idle_stats.parity_errs++;
1068 } else if (data & CyOVERRUN) {
1069 tty_insert_flip_char(tty, 0,
1070 TTY_OVERRUN);
1071 info->icount.rx++;
1072 /* If the flip buffer itself is
1073 overflowing, we still lose
1074 the next incoming character.
1075 */
1076 tty_insert_flip_char(tty,
1077 readb(base_addr + (CyRDSR <<
1078 index)), TTY_FRAME);
02f1175c 1079 info->icount.rx++;
02f1175c 1080 info->idle_stats.overruns++;
ce97a097
JS		 1081 /* These two conditions may imply */
1082 /* a normal read should be done. */
1083 /* } else if(data & CyTIMEOUT) { */
1084 /* } else if(data & CySPECHAR) { */
1085 } else {
1086 tty_insert_flip_char(tty, 0,
1087 TTY_NORMAL);
1088 info->icount.rx++;
02f1175c 1089 }
ce97a097
JS		 1090 } else {
1091 tty_insert_flip_char(tty, 0, TTY_NORMAL);
1092 info->icount.rx++;
1093 }
1094 } else {
1095 /* there was a software buffer overrun and nothing
1096 * could be done about it!!! */
1097 info->icount.buf_overrun++;
1098 info->idle_stats.overruns++;
1099 }
1100 } else { /* normal character reception */
1101 /* load # chars available from the chip */
1102 char_count = readb(base_addr + (CyRDCR << index));
e941027f
JS		 1103
1104#ifdef CY_ENABLE_MONITORING
ce97a097
JS		 1105 ++info->mon.int_count;
1106 info->mon.char_count += char_count;
1107 if (char_count > info->mon.char_max)
1108 info->mon.char_max = char_count;
1109 info->mon.char_last = char_count;
e941027f 1110#endif
ce97a097
JS		 1111 len = tty_buffer_request_room(tty, char_count);
1112 while (len--) {
1113 data = readb(base_addr + (CyRDSR << index));
1114 tty_insert_flip_char(tty, data, TTY_NORMAL);
1115 info->idle_stats.recv_bytes++;
1116 info->icount.rx++;
e941027f 1117#ifdef CY_16Y_HACK
ce97a097 1118 udelay(10L);
e941027f 1119#endif
e941027f 1120 }
ce97a097 1121 info->idle_stats.recv_idle = jiffies;
e941027f 1122 }
ce97a097
JS		 1123 tty_schedule_flip(tty);
1124end:
1125 /* end of service */
1126 cy_writeb(base_addr + (CyRIR << index), save_xir & 0x3f);
1127 cy_writeb(base_addr + (CyCAR << index), save_car);
ce97a097 1128}
e941027f 1129
65f76a82 1130static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
ce97a097
JS		 1131 void __iomem *base_addr)
1132{
1133 struct cyclades_port *info;
65f76a82
JS		 1134 int char_count, index = cinfo->bus_index;
1135 u8 save_xir, channel, save_car, outch;
ce97a097
JS		 1136
1137 /* Since we only get here when the transmit buffer
1138 is empty, we know we can always stuff a dozen
1139 characters. */
e941027f 1140#ifdef CY_DEBUG_INTERRUPTS
ce97a097 1141 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
e941027f
JS		 1142#endif
1143
ce97a097 1144 /* determine the channel & change to that context */
65f76a82
JS		 1145 save_xir = readb(base_addr + (CyTIR << index));
1146 channel = save_xir & CyIRChannel;
ce97a097
JS		 1147 save_car = readb(base_addr + (CyCAR << index));
1148 cy_writeb(base_addr + (CyCAR << index), save_xir);
1149
1150 /* validate the port# (as configured and open) */
1151 if (channel + chip * 4 >= cinfo->nports) {
1152 cy_writeb(base_addr + (CySRER << index),
1153 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1154 goto end;
1155 }
1156 info = &cinfo->ports[channel + chip * 4];
77451e53 1157 if (info->port.tty == NULL) {
ce97a097
JS		 1158 cy_writeb(base_addr + (CySRER << index),
1159 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
1160 goto end;
1161 }
02f1175c 1162
ce97a097
JS		 1163 /* load the on-chip space for outbound data */
1164 char_count = info->xmit_fifo_size;
02f1175c 1165
ce97a097
JS		 1166 if (info->x_char) { /* send special char */
1167 outch = info->x_char;
1168 cy_writeb(base_addr + (CyTDR << index), outch);
1169 char_count--;
1170 info->icount.tx++;
1171 info->x_char = 0;
1172 }
02f1175c 1173
ce97a097
JS		 1174 if (info->breakon || info->breakoff) {
1175 if (info->breakon) {
1176 cy_writeb(base_addr + (CyTDR << index), 0);
1177 cy_writeb(base_addr + (CyTDR << index), 0x81);
1178 info->breakon = 0;
1179 char_count -= 2;
e941027f 1180 }
ce97a097
JS		 1181 if (info->breakoff) {
1182 cy_writeb(base_addr + (CyTDR << index), 0);
1183 cy_writeb(base_addr + (CyTDR << index), 0x83);
1184 info->breakoff = 0;
1185 char_count -= 2;
e941027f 1186 }
ce97a097 1187 }
02f1175c 1188
ce97a097
JS		 1189 while (char_count-- > 0) {
1190 if (!info->xmit_cnt) {
1191 if (readb(base_addr + (CySRER << index)) & CyTxMpty) {
1192 cy_writeb(base_addr + (CySRER << index),
1193 readb(base_addr + (CySRER << index)) &
02f1175c 1194 ~CyTxMpty);
ce97a097
JS		 1195 } else {
1196 cy_writeb(base_addr + (CySRER << index),
1197 (readb(base_addr + (CySRER << index)) &
02f1175c 1198 ~CyTxRdy) | CyTxMpty);
02f1175c 1199 }
ce97a097
JS		 1200 goto done;
1201 }
77451e53 1202 if (info->port.xmit_buf == NULL) {
ce97a097
JS		 1203 cy_writeb(base_addr + (CySRER << index),
1204 readb(base_addr + (CySRER << index)) &
02f1175c 1205 ~CyTxRdy);
ce97a097
JS		 1206 goto done;
1207 }
77451e53 1208 if (info->port.tty->stopped || info->port.tty->hw_stopped) {
ce97a097
JS		 1209 cy_writeb(base_addr + (CySRER << index),
1210 readb(base_addr + (CySRER << index)) &
02f1175c 1211 ~CyTxRdy);
ce97a097
JS		 1212 goto done;
1213 }
1214 /* Because the Embedded Transmit Commands have been enabled,
1215 * we must check to see if the escape character, NULL, is being
1216 * sent. If it is, we must ensure that there is room for it to
1217 * be doubled in the output stream. Therefore we no longer
1218 * advance the pointer when the character is fetched, but
1219 * rather wait until after the check for a NULL output
1220 * character. This is necessary because there may not be room
1221 * for the two chars needed to send a NULL.)
1222 */
77451e53 1223 outch = info->port.xmit_buf[info->xmit_tail];
ce97a097
JS		 1224 if (outch) {
1225 info->xmit_cnt--;
1226 info->xmit_tail = (info->xmit_tail + 1) &
1227 (SERIAL_XMIT_SIZE - 1);
1228 cy_writeb(base_addr + (CyTDR << index), outch);
1229 info->icount.tx++;
1230 } else {
1231 if (char_count > 1) {
02f1175c
JS		 1232 info->xmit_cnt--;
1233 info->xmit_tail = (info->xmit_tail + 1) &
ce97a097 1234 (SERIAL_XMIT_SIZE - 1);
02f1175c 1235 cy_writeb(base_addr + (CyTDR << index), outch);
ce97a097 1236 cy_writeb(base_addr + (CyTDR << index), 0);
02f1175c 1237 info->icount.tx++;
ce97a097 1238 char_count--;
02f1175c 1239 }
e941027f 1240 }
e941027f
JS		 1241 }
1242
ce97a097 1243done:
77451e53 1244 tty_wakeup(info->port.tty);
ce97a097
JS		 1245end:
1246 /* end of service */
1247 cy_writeb(base_addr + (CyTIR << index), save_xir & 0x3f);
1248 cy_writeb(base_addr + (CyCAR << index), save_car);
ce97a097 1249}
02f1175c 1250
ce97a097
JS		 1251static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
1252 void __iomem *base_addr)
1253{
1254 struct cyclades_port *info;
65f76a82
JS		 1255 int index = cinfo->bus_index;
1256 u8 save_xir, channel, save_car, mdm_change, mdm_status;
ce97a097
JS		 1257
1258 /* determine the channel & change to that context */
65f76a82
JS		 1259 save_xir = readb(base_addr + (CyMIR << index));
1260 channel = save_xir & CyIRChannel;
ce97a097
JS		 1261 info = &cinfo->ports[channel + chip * 4];
1262 save_car = readb(base_addr + (CyCAR << index));
1263 cy_writeb(base_addr + (CyCAR << index), save_xir);
1264
1265 mdm_change = readb(base_addr + (CyMISR << index));
1266 mdm_status = readb(base_addr + (CyMSVR1 << index));
1267
77451e53 1268 if (!info->port.tty)
ce97a097
JS		 1269 goto end;
1270
1271 if (mdm_change & CyANY_DELTA) {
1272 /* For statistics only */
1273 if (mdm_change & CyDCD)
1274 info->icount.dcd++;
1275 if (mdm_change & CyCTS)
1276 info->icount.cts++;
1277 if (mdm_change & CyDSR)
1278 info->icount.dsr++;
1279 if (mdm_change & CyRI)
1280 info->icount.rng++;
1281
1282 wake_up_interruptible(&info->delta_msr_wait);
1283 }
1284
77451e53 1285 if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) {
ce97a097 1286 if (!(mdm_status & CyDCD)) {
77451e53
AC		 1287 tty_hangup(info->port.tty);
1288 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
ce97a097 1289 }
77451e53 1290 wake_up_interruptible(&info->port.open_wait);
ce97a097 1291 }
77451e53
AC		 1292 if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) {
1293 if (info->port.tty->hw_stopped) {
ce97a097
JS		 1294 if (mdm_status & CyCTS) {
1295 /* cy_start isn't used
1296 because... !!! */
77451e53 1297 info->port.tty->hw_stopped = 0;
ce97a097
JS		 1298 cy_writeb(base_addr + (CySRER << index),
1299 readb(base_addr + (CySRER << index)) |
1300 CyTxRdy);
77451e53 1301 tty_wakeup(info->port.tty);
02f1175c 1302 }
ce97a097
JS		 1303 } else {
1304 if (!(mdm_status & CyCTS)) {
1305 /* cy_stop isn't used
1306 because ... !!! */
77451e53 1307 info->port.tty->hw_stopped = 1;
ce97a097
JS		 1308 cy_writeb(base_addr + (CySRER << index),
1309 readb(base_addr + (CySRER << index)) &
1310 ~CyTxRdy);
02f1175c 1311 }
e941027f 1312 }
e941027f 1313 }
ce97a097
JS		 1314/* if (mdm_change & CyDSR) {
1315 }
1316 if (mdm_change & CyRI) {
1317 }*/
1318end:
1319 /* end of service */
1320 cy_writeb(base_addr + (CyMIR << index), save_xir & 0x3f);
1321 cy_writeb(base_addr + (CyCAR << index), save_car);
e941027f
JS		 1322}
1323
1da177e4
LT		 1324/* The real interrupt service routine is called
1325 whenever the card wants its hand held--chars
1326 received, out buffer empty, modem change, etc.
1327 */
02f1175c 1328static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1da177e4 1329{
02f1175c 1330 int status;
f7429034 1331 struct cyclades_card *cinfo = dev_id;
02f1175c 1332 void __iomem *base_addr, *card_base_addr;
65f76a82 1333 unsigned int chip, too_many, had_work;
02f1175c 1334 int index;
02f1175c 1335
f7429034 1336 if (unlikely(cinfo == NULL)) {
1da177e4 1337#ifdef CY_DEBUG_INTERRUPTS
15ed6cc0
AC		 1338 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
1339 irq);
1da177e4 1340#endif
02f1175c
JS		 1341 return IRQ_NONE; /* spurious interrupt */
1342 }
1343
1344 card_base_addr = cinfo->base_addr;
1345 index = cinfo->bus_index;
1346
f1e83c6c
JS		 1347 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1348 if (unlikely(card_base_addr == NULL))
1349 return IRQ_HANDLED;
1350
02f1175c
JS		 1351 /* This loop checks all chips in the card. Make a note whenever
1352 _any_ chip had some work to do, as this is considered an
1353 indication that there will be more to do. Only when no chip
1354 has any work does this outermost loop exit.
1355 */
1356 do {
1357 had_work = 0;
1358 for (chip = 0; chip < cinfo->num_chips; chip++) {
1359 base_addr = cinfo->base_addr +
1360 (cy_chip_offset[chip] << index);
1361 too_many = 0;
db05c3b1 1362 while ((status = readb(base_addr +
02f1175c
JS		 1363 (CySVRR << index))) != 0x00) {
1364 had_work++;
1365 /* The purpose of the following test is to ensure that
1366 no chip can monopolize the driver. This forces the
1367 chips to be checked in a round-robin fashion (after
1368 draining each of a bunch (1000) of characters).
1369 */
ce97a097 1370 if (1000 < too_many++)
02f1175c 1371 break;
1c0a387c 1372 spin_lock(&cinfo->card_lock);
ce97a097
JS		 1373 if (status & CySRReceive) /* rx intr */
1374 cyy_chip_rx(cinfo, chip, base_addr);
1375 if (status & CySRTransmit) /* tx intr */
1376 cyy_chip_tx(cinfo, chip, base_addr);
1377 if (status & CySRModem) /* modem intr */
1378 cyy_chip_modem(cinfo, chip, base_addr);
1c0a387c 1379 spin_unlock(&cinfo->card_lock);
02f1175c
JS		 1380 }
1381 }
1382 } while (had_work);
1383
1384 /* clear interrupts */
1385 spin_lock(&cinfo->card_lock);
1386 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1387 /* Cy_ClrIntr is 0x1800 */
1388 spin_unlock(&cinfo->card_lock);
1389 return IRQ_HANDLED;
1390} /* cyy_interrupt */
1da177e4
LT		 1391
1392/***********************************************************/
1393/********* End of block of Cyclom-Y specific code **********/
15ed6cc0 1394/******** Start of block of Cyclades-Z specific code *******/
1da177e4
LT		 1395/***********************************************************/
1396
1397static int
02f1175c 1398cyz_fetch_msg(struct cyclades_card *cinfo,
15ed6cc0 1399 __u32 *channel, __u8 *cmd, __u32 *param)
1da177e4 1400{
02f1175c
JS		 1401 struct FIRM_ID __iomem *firm_id;
1402 struct ZFW_CTRL __iomem *zfw_ctrl;
1403 struct BOARD_CTRL __iomem *board_ctrl;
1404 unsigned long loc_doorbell;
1405
1406 firm_id = cinfo->base_addr + ID_ADDRESS;
db05c3b1 1407 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 1408 board_ctrl = &zfw_ctrl->board_ctrl;
1409
97e87f8e 1410 loc_doorbell = readl(&cinfo->ctl_addr.p9060->loc_doorbell);
02f1175c
JS		 1411 if (loc_doorbell) {
1412 *cmd = (char)(0xff & loc_doorbell);
db05c3b1
JS		 1413 *channel = readl(&board_ctrl->fwcmd_channel);
1414 *param = (__u32) readl(&board_ctrl->fwcmd_param);
97e87f8e 1415 cy_writel(&cinfo->ctl_addr.p9060->loc_doorbell, 0xffffffff);
02f1175c
JS		 1416 return 1;
1417 }
1418 return 0;
1419} /* cyz_fetch_msg */
1da177e4
LT		 1420
1421static int
02f1175c 1422cyz_issue_cmd(struct cyclades_card *cinfo,
1a86b5e3 1423 __u32 channel, __u8 cmd, __u32 param)
1da177e4 1424{
02f1175c
JS		 1425 struct FIRM_ID __iomem *firm_id;
1426 struct ZFW_CTRL __iomem *zfw_ctrl;
1427 struct BOARD_CTRL __iomem *board_ctrl;
1a86b5e3 1428 __u32 __iomem *pci_doorbell;
65f76a82 1429 unsigned int index;
02f1175c
JS		 1430
1431 firm_id = cinfo->base_addr + ID_ADDRESS;
2693f485 1432 if (!cyz_is_loaded(cinfo))
096dcfce 1433 return -1;
15ed6cc0 1434
db05c3b1 1435 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 1436 board_ctrl = &zfw_ctrl->board_ctrl;
1437
1438 index = 0;
97e87f8e 1439 pci_doorbell = &cinfo->ctl_addr.p9060->pci_doorbell;
db05c3b1 1440 while ((readl(pci_doorbell) & 0xff) != 0) {
15ed6cc0 1441 if (index++ == 1000)
db05c3b1 1442 return (int)(readl(pci_doorbell) & 0xff);
02f1175c
JS		 1443 udelay(50L);
1444 }
1445 cy_writel(&board_ctrl->hcmd_channel, channel);
1446 cy_writel(&board_ctrl->hcmd_param, param);
1447 cy_writel(pci_doorbell, (long)cmd);
1448
096dcfce 1449 return 0;
02f1175c 1450} /* cyz_issue_cmd */
1da177e4 1451
65f76a82 1452static void cyz_handle_rx(struct cyclades_port *info,
ad39c300 1453 struct BUF_CTRL __iomem *buf_ctrl)
1da177e4 1454{
875b206b 1455 struct cyclades_card *cinfo = info->card;
77451e53 1456 struct tty_struct *tty = info->port.tty;
65f76a82 1457 unsigned int char_count;
02f1175c 1458 int len;
1da177e4 1459#ifdef BLOCKMOVE
ce71b0ff 1460 unsigned char *buf;
1da177e4 1461#else
02f1175c 1462 char data;
1da177e4 1463#endif
ad39c300 1464 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1da177e4 1465
db05c3b1
JS		 1466 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1467 rx_put = readl(&buf_ctrl->rx_put);
1468 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1469 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
02f1175c
JS		 1470 if (rx_put >= rx_get)
1471 char_count = rx_put - rx_get;
1472 else
1473 char_count = rx_put - rx_get + rx_bufsize;
1da177e4 1474
02f1175c 1475 if (char_count) {
1da177e4 1476#ifdef CY_ENABLE_MONITORING
02f1175c
JS		 1477 info->mon.int_count++;
1478 info->mon.char_count += char_count;
1479 if (char_count > info->mon.char_max)
1480 info->mon.char_max = char_count;
1481 info->mon.char_last = char_count;
1da177e4 1482#endif
f7429034 1483 if (tty == NULL) {
02f1175c
JS		 1484 /* flush received characters */
1485 new_rx_get = (new_rx_get + char_count) &
1486 (rx_bufsize - 1);
1487 info->rflush_count++;
1488 } else {
1da177e4 1489#ifdef BLOCKMOVE
02f1175c
JS		 1490 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1491 for performance, but because of buffer boundaries, there
1492 may be several steps to the operation */
ce71b0ff
JS		 1493 while (1) {
1494 len = tty_prepare_flip_string(tty, &buf,
1495 char_count);
1496 if (!len)
1497 break;
1498
1499 len = min_t(unsigned int, min(len, char_count),
1500 rx_bufsize - new_rx_get);
1501
1502 memcpy_fromio(buf, cinfo->base_addr +
1503 rx_bufaddr + new_rx_get, len);
1504
1505 new_rx_get = (new_rx_get + len) &
02f1175c 1506 (rx_bufsize - 1);
ce71b0ff
JS		 1507 char_count -= len;
1508 info->icount.rx += len;
1509 info->idle_stats.recv_bytes += len;
02f1175c 1510 }
1da177e4 1511#else
02f1175c
JS		 1512 len = tty_buffer_request_room(tty, char_count);
1513 while (len--) {
db05c3b1 1514 data = readb(cinfo->base_addr + rx_bufaddr +
02f1175c 1515 new_rx_get);
15ed6cc0
AC		 1516 new_rx_get = (new_rx_get + 1) &
1517 (rx_bufsize - 1);
02f1175c
JS		 1518 tty_insert_flip_char(tty, data, TTY_NORMAL);
1519 info->idle_stats.recv_bytes++;
1520 info->icount.rx++;
1521 }
1da177e4
LT		 1522#endif
1523#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1524 /* Recalculate the number of chars in the RX buffer and issue
1525 a cmd in case it's higher than the RX high water mark */
db05c3b1 1526 rx_put = readl(&buf_ctrl->rx_put);
02f1175c
JS		 1527 if (rx_put >= rx_get)
1528 char_count = rx_put - rx_get;
1529 else
1530 char_count = rx_put - rx_get + rx_bufsize;
65f76a82 1531 if (char_count >= readl(&buf_ctrl->rx_threshold) &&
ebafeeff
JS		 1532 !timer_pending(&cyz_rx_full_timer[
1533 info->line]))
1534 mod_timer(&cyz_rx_full_timer[info->line],
1535 jiffies + 1);
1da177e4 1536#endif
02f1175c
JS		 1537 info->idle_stats.recv_idle = jiffies;
1538 tty_schedule_flip(tty);
1539 }
1540 /* Update rx_get */
1541 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1da177e4 1542 }
1da177e4
LT		 1543}
1544
65f76a82 1545static void cyz_handle_tx(struct cyclades_port *info,
ad39c300 1546 struct BUF_CTRL __iomem *buf_ctrl)
1da177e4 1547{
875b206b 1548 struct cyclades_card *cinfo = info->card;
77451e53 1549 struct tty_struct *tty = info->port.tty;
65f76a82
JS		 1550 u8 data;
1551 unsigned int char_count;
1da177e4 1552#ifdef BLOCKMOVE
02f1175c 1553 int small_count;
1da177e4 1554#endif
ad39c300 1555 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1da177e4 1556
02f1175c
JS		 1557 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1558 return;
1da177e4 1559
db05c3b1
JS		 1560 tx_get = readl(&buf_ctrl->tx_get);
1561 tx_put = readl(&buf_ctrl->tx_put);
1562 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1563 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
02f1175c
JS		 1564 if (tx_put >= tx_get)
1565 char_count = tx_get - tx_put - 1 + tx_bufsize;
1566 else
1567 char_count = tx_get - tx_put - 1;
1da177e4 1568
02f1175c 1569 if (char_count) {
1da177e4 1570
f7429034 1571 if (tty == NULL)
02f1175c 1572 goto ztxdone;
1da177e4 1573
02f1175c
JS		 1574 if (info->x_char) { /* send special char */
1575 data = info->x_char;
1da177e4 1576
02f1175c
JS		 1577 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1578 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1579 info->x_char = 0;
1580 char_count--;
1581 info->icount.tx++;
02f1175c 1582 }
1da177e4 1583#ifdef BLOCKMOVE
02f1175c
JS		 1584 while (0 < (small_count = min_t(unsigned int,
1585 tx_bufsize - tx_put, min_t(unsigned int,
1586 (SERIAL_XMIT_SIZE - info->xmit_tail),
1587 min_t(unsigned int, info->xmit_cnt,
1588 char_count))))) {
1589
1590 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1591 tx_put),
77451e53 1592 &info->port.xmit_buf[info->xmit_tail],
02f1175c
JS		 1593 small_count);
1594
1595 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1596 char_count -= small_count;
1597 info->icount.tx += small_count;
1598 info->xmit_cnt -= small_count;
1599 info->xmit_tail = (info->xmit_tail + small_count) &
1600 (SERIAL_XMIT_SIZE - 1);
02f1175c 1601 }
1da177e4 1602#else
02f1175c 1603 while (info->xmit_cnt && char_count) {
77451e53 1604 data = info->port.xmit_buf[info->xmit_tail];
02f1175c
JS		 1605 info->xmit_cnt--;
1606 info->xmit_tail = (info->xmit_tail + 1) &
1607 (SERIAL_XMIT_SIZE - 1);
1608
1609 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1610 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1611 char_count--;
1612 info->icount.tx++;
02f1175c 1613 }
1da177e4 1614#endif
ebafeeff 1615 tty_wakeup(tty);
7fa57a0c 1616ztxdone:
02f1175c
JS		 1617 /* Update tx_put */
1618 cy_writel(&buf_ctrl->tx_put, tx_put);
1da177e4 1619 }
1da177e4
LT		 1620}
1621
02f1175c 1622static void cyz_handle_cmd(struct cyclades_card *cinfo)
1da177e4 1623{
02f1175c
JS		 1624 struct tty_struct *tty;
1625 struct cyclades_port *info;
ad39c300
JS		 1626 static struct FIRM_ID __iomem *firm_id;
1627 static struct ZFW_CTRL __iomem *zfw_ctrl;
1628 static struct BOARD_CTRL __iomem *board_ctrl;
1629 static struct CH_CTRL __iomem *ch_ctrl;
1630 static struct BUF_CTRL __iomem *buf_ctrl;
101b8159 1631 __u32 channel, param, fw_ver;
1a86b5e3 1632 __u8 cmd;
02f1175c
JS		 1633 int special_count;
1634 int delta_count;
1635
1636 firm_id = cinfo->base_addr + ID_ADDRESS;
db05c3b1 1637 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 1638 board_ctrl = &zfw_ctrl->board_ctrl;
db05c3b1 1639 fw_ver = readl(&board_ctrl->fw_version);
02f1175c
JS		 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];
77451e53 1645 tty = info->port.tty;
15ed6cc0 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++;
77451e53 1671 if (info->port.flags & ASYNC_CHECK_CD) {
02f1175c 1672 if ((fw_ver > 241 ? ((u_long) param) :
db05c3b1 1673 readl(&ch_ctrl->rs_status)) &
02f1175c 1674 C_RS_DCD) {
77451e53 1675 wake_up_interruptible(&info->port.open_wait);
02f1175c 1676 } else {
77451e53
AC		 1677 tty_hangup(info->port.tty);
1678 wake_up_interruptible(&info->port.open_wait);
1679 info->port.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
2693f485 1740 if (unlikely(!cyz_is_loaded(cinfo))) {
1da177e4 1741#ifdef CY_DEBUG_INTERRUPTS
21719191
JS		 1742 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1743 "(IRQ%d).\n", irq);
1da177e4 1744#endif
02f1175c
JS		 1745 return IRQ_NONE;
1746 }
1da177e4 1747
02f1175c
JS		 1748 /* Handle the interrupts */
1749 cyz_handle_cmd(cinfo);
1da177e4 1750
02f1175c
JS		 1751 return IRQ_HANDLED;
1752} /* cyz_interrupt */
1da177e4 1753
02f1175c 1754static void cyz_rx_restart(unsigned long arg)
1da177e4 1755{
02f1175c 1756 struct cyclades_port *info = (struct cyclades_port *)arg;
875b206b 1757 struct cyclades_card *card = info->card;
02f1175c 1758 int retval;
875b206b 1759 __u32 channel = info->line - card->first_line;
02f1175c
JS		 1760 unsigned long flags;
1761
9fa1b3b1 1762 spin_lock_irqsave(&card->card_lock, flags);
875b206b 1763 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
02f1175c 1764 if (retval != 0) {
21719191 1765 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
02f1175c
JS		 1766 info->line, retval);
1767 }
9fa1b3b1 1768 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4
LT		 1769}
1770
02f1175c 1771#else /* CONFIG_CYZ_INTR */
1da177e4 1772
02f1175c 1773static void cyz_poll(unsigned long arg)
1da177e4 1774{
02f1175c
JS		 1775 struct cyclades_card *cinfo;
1776 struct cyclades_port *info;
1777 struct tty_struct *tty;
c4923b4f
JS		 1778 struct FIRM_ID __iomem *firm_id;
1779 struct ZFW_CTRL __iomem *zfw_ctrl;
1780 struct BOARD_CTRL __iomem *board_ctrl;
c4923b4f 1781 struct BUF_CTRL __iomem *buf_ctrl;
b7050906 1782 unsigned long expires = jiffies + HZ;
65f76a82 1783 unsigned int port, card;
1da177e4 1784
02f1175c
JS		 1785 for (card = 0; card < NR_CARDS; card++) {
1786 cinfo = &cy_card[card];
1787
2693f485 1788 if (!cy_is_Z(cinfo))
02f1175c 1789 continue;
2693f485 1790 if (!cyz_is_loaded(cinfo))
02f1175c
JS		 1791 continue;
1792
1793 firm_id = cinfo->base_addr + ID_ADDRESS;
1794 zfw_ctrl = cinfo->base_addr +
db05c3b1 1795 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 1796 board_ctrl = &(zfw_ctrl->board_ctrl);
1da177e4
LT		 1797
1798 /* Skip first polling cycle to avoid racing conditions with the FW */
02f1175c 1799 if (!cinfo->intr_enabled) {
db05c3b1 1800 cinfo->nports = (int)readl(&board_ctrl->n_channel);
02f1175c
JS		 1801 cinfo->intr_enabled = 1;
1802 continue;
1803 }
1da177e4 1804
02f1175c 1805 cyz_handle_cmd(cinfo);
1da177e4 1806
02f1175c 1807 for (port = 0; port < cinfo->nports; port++) {
dd025c0c 1808 info = &cinfo->ports[port];
77451e53 1809 tty = info->port.tty;
02f1175c 1810 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1da177e4 1811
02f1175c 1812 if (!info->throttle)
65f76a82
JS		 1813 cyz_handle_rx(info, buf_ctrl);
1814 cyz_handle_tx(info, buf_ctrl);
02f1175c
JS		 1815 }
1816 /* poll every 'cyz_polling_cycle' period */
b7050906 1817 expires = jiffies + cyz_polling_cycle;
1da177e4 1818 }
b7050906 1819 mod_timer(&cyz_timerlist, expires);
02f1175c 1820} /* cyz_poll */
1da177e4 1821
02f1175c 1822#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 1823
1824/********** End of block of Cyclades-Z specific code *********/
1825/***********************************************************/
1826
1da177e4
LT		 1827/* This is called whenever a port becomes active;
1828 interrupts are enabled and DTR & RTS are turned on.
1829 */
02f1175c 1830static int startup(struct cyclades_port *info)
1da177e4 1831{
875b206b 1832 struct cyclades_card *card;
02f1175c
JS		 1833 unsigned long flags;
1834 int retval = 0;
1835 void __iomem *base_addr;
875b206b 1836 int chip, channel, index;
02f1175c 1837 unsigned long page;
1da177e4 1838
02f1175c 1839 card = info->card;
875b206b 1840 channel = info->line - card->first_line;
1da177e4 1841
02f1175c
JS		 1842 page = get_zeroed_page(GFP_KERNEL);
1843 if (!page)
1844 return -ENOMEM;
1da177e4 1845
9fa1b3b1 1846 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1847
77451e53 1848 if (info->port.flags & ASYNC_INITIALIZED) {
02f1175c
JS		 1849 free_page(page);
1850 goto errout;
1851 }
1da177e4 1852
02f1175c 1853 if (!info->type) {
77451e53
AC		 1854 if (info->port.tty)
1855 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
02f1175c
JS		 1856 free_page(page);
1857 goto errout;
1858 }
1da177e4 1859
77451e53 1860 if (info->port.xmit_buf)
02f1175c
JS		 1861 free_page(page);
1862 else
77451e53 1863 info->port.xmit_buf = (unsigned char *)page;
1da177e4 1864
9fa1b3b1 1865 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 1866
02f1175c 1867 set_line_char(info);
1da177e4 1868
2693f485 1869 if (!cy_is_Z(card)) {
02f1175c
JS		 1870 chip = channel >> 2;
1871 channel &= 0x03;
875b206b
JS		 1872 index = card->bus_index;
1873 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4
LT		 1874
1875#ifdef CY_DEBUG_OPEN
21719191
JS		 1876 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1877 "base_addr %p\n",
1878 card, chip, channel, base_addr);
1da177e4 1879#endif
9fa1b3b1 1880 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1881
02f1175c 1882 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1da177e4 1883
02f1175c
JS		 1884 cy_writeb(base_addr + (CyRTPR << index),
1885 (info->default_timeout ? info->default_timeout : 0x02));
1886 /* 10ms rx timeout */
1da177e4 1887
02f1175c
JS		 1888 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
1889 index);
1da177e4 1890
02f1175c
JS		 1891 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1892 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
1893 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1da177e4
LT		 1894
1895#ifdef CY_DEBUG_DTR
21719191
JS		 1896 printk(KERN_DEBUG "cyc:startup raising DTR\n");
1897 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 1898 readb(base_addr + (CyMSVR1 << index)),
1899 readb(base_addr + (CyMSVR2 << index)));
1da177e4
LT		 1900#endif
1901
02f1175c 1902 cy_writeb(base_addr + (CySRER << index),
db05c3b1 1903 readb(base_addr + (CySRER << index)) | CyRxData);
77451e53 1904 info->port.flags |= ASYNC_INITIALIZED;
1da177e4 1905
77451e53
AC		 1906 if (info->port.tty)
1907 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
02f1175c
JS		 1908 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1909 info->breakon = info->breakoff = 0;
1910 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1911 info->idle_stats.in_use =
1912 info->idle_stats.recv_idle =
1913 info->idle_stats.xmit_idle = jiffies;
1da177e4 1914
9fa1b3b1 1915 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 1916
02f1175c
JS		 1917 } else {
1918 struct FIRM_ID __iomem *firm_id;
1919 struct ZFW_CTRL __iomem *zfw_ctrl;
1920 struct BOARD_CTRL __iomem *board_ctrl;
1921 struct CH_CTRL __iomem *ch_ctrl;
1da177e4 1922
875b206b 1923 base_addr = card->base_addr;
1da177e4 1924
02f1175c 1925 firm_id = base_addr + ID_ADDRESS;
2693f485 1926 if (!cyz_is_loaded(card))
02f1175c 1927 return -ENODEV;
1da177e4 1928
875b206b 1929 zfw_ctrl = card->base_addr +
db05c3b1 1930 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 1931 board_ctrl = &zfw_ctrl->board_ctrl;
1932 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4
LT		 1933
1934#ifdef CY_DEBUG_OPEN
21719191
JS		 1935 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1936 "base_addr %p\n", card, channel, base_addr);
1da177e4 1937#endif
9fa1b3b1 1938 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 1939
02f1175c 1940 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1da177e4
LT		 1941#ifdef Z_WAKE
1942#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1943 cy_writel(&ch_ctrl[channel].intr_enable,
1944 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1945 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1da177e4 1946#else
02f1175c
JS		 1947 cy_writel(&ch_ctrl[channel].intr_enable,
1948 C_IN_IOCTLW | C_IN_MDCD);
1949#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 1950#else
1951#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1952 cy_writel(&ch_ctrl[channel].intr_enable,
1953 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1954 C_IN_RXNNDT | C_IN_MDCD);
1da177e4 1955#else
02f1175c
JS		 1956 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
1957#endif /* CONFIG_CYZ_INTR */
1958#endif /* Z_WAKE */
1959
875b206b 1960 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
02f1175c 1961 if (retval != 0) {
21719191
JS		 1962 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1963 "%x\n", info->line, retval);
02f1175c 1964 }
1da177e4 1965
02f1175c 1966 /* Flush RX buffers before raising DTR and RTS */
875b206b 1967 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
02f1175c 1968 if (retval != 0) {
21719191
JS		 1969 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1970 "%x\n", info->line, retval);
02f1175c 1971 }
1da177e4 1972
02f1175c
JS		 1973 /* set timeout !!! */
1974 /* set RTS and DTR !!! */
1975 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1 1976 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
02f1175c 1977 C_RS_DTR);
9fa1b3b1 1978 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
02f1175c 1979 if (retval != 0) {
21719191
JS		 1980 printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
1981 "%x\n", info->line, retval);
02f1175c 1982 }
1da177e4 1983#ifdef CY_DEBUG_DTR
21719191 1984 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
1da177e4
LT		 1985#endif
1986
02f1175c
JS		 1987 /* enable send, recv, modem !!! */
1988
77451e53
AC		 1989 info->port.flags |= ASYNC_INITIALIZED;
1990 if (info->port.tty)
1991 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
02f1175c
JS		 1992 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1993 info->breakon = info->breakoff = 0;
1994 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1995 info->idle_stats.in_use =
1996 info->idle_stats.recv_idle =
1997 info->idle_stats.xmit_idle = jiffies;
1da177e4 1998
9fa1b3b1 1999 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 2000 }
1da177e4
LT		 2001
2002#ifdef CY_DEBUG_OPEN
21719191 2003 printk(KERN_DEBUG "cyc startup done\n");
1da177e4
LT		 2004#endif
2005 return 0;
2006
2007errout:
9fa1b3b1 2008 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 2009 return retval;
02f1175c 2010} /* startup */
1da177e4 2011
02f1175c 2012static void start_xmit(struct cyclades_port *info)
1da177e4 2013{
875b206b 2014 struct cyclades_card *card;
02f1175c
JS		 2015 unsigned long flags;
2016 void __iomem *base_addr;
875b206b 2017 int chip, channel, index;
1da177e4 2018
02f1175c 2019 card = info->card;
875b206b 2020 channel = info->line - card->first_line;
2693f485 2021 if (!cy_is_Z(card)) {
02f1175c
JS		 2022 chip = channel >> 2;
2023 channel &= 0x03;
875b206b
JS		 2024 index = card->bus_index;
2025 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 2026
9fa1b3b1 2027 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2028 cy_writeb(base_addr + (CyCAR << index), channel);
2029 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2030 readb(base_addr + (CySRER << index)) | CyTxRdy);
9fa1b3b1 2031 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2032 } else {
1da177e4 2033#ifdef CONFIG_CYZ_INTR
02f1175c 2034 int retval;
1da177e4 2035
9fa1b3b1 2036 spin_lock_irqsave(&card->card_lock, flags);
875b206b 2037 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
02f1175c 2038 if (retval != 0) {
21719191
JS		 2039 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2040 "%x\n", info->line, retval);
02f1175c 2041 }
9fa1b3b1 2042 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2043#else /* CONFIG_CYZ_INTR */
2044 /* Don't have to do anything at this time */
2045#endif /* CONFIG_CYZ_INTR */
2046 }
2047} /* start_xmit */
1da177e4
LT		 2048
2049/*
2050 * This routine shuts down a serial port; interrupts are disabled,
2051 * and DTR is dropped if the hangup on close termio flag is on.
2052 */
02f1175c 2053static void shutdown(struct cyclades_port *info)
1da177e4 2054{
875b206b 2055 struct cyclades_card *card;
02f1175c
JS		 2056 unsigned long flags;
2057 void __iomem *base_addr;
875b206b 2058 int chip, channel, index;
02f1175c 2059
77451e53 2060 if (!(info->port.flags & ASYNC_INITIALIZED))
02f1175c 2061 return;
02f1175c
JS		 2062
2063 card = info->card;
875b206b 2064 channel = info->line - card->first_line;
2693f485 2065 if (!cy_is_Z(card)) {
02f1175c
JS		 2066 chip = channel >> 2;
2067 channel &= 0x03;
875b206b
JS		 2068 index = card->bus_index;
2069 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4
LT		 2070
2071#ifdef CY_DEBUG_OPEN
21719191
JS		 2072 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2073 "channel %d, base_addr %p\n",
2074 card, chip, channel, base_addr);
1da177e4
LT		 2075#endif
2076
9fa1b3b1 2077 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2078
2079 /* Clear delta_msr_wait queue to avoid mem leaks. */
2080 wake_up_interruptible(&info->delta_msr_wait);
1da177e4 2081
77451e53 2082 if (info->port.xmit_buf) {
02f1175c 2083 unsigned char *temp;
77451e53
AC		 2084 temp = info->port.xmit_buf;
2085 info->port.xmit_buf = NULL;
02f1175c
JS		 2086 free_page((unsigned long)temp);
2087 }
2088 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
77451e53 2089 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) {
02f1175c
JS		 2090 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2091 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
1da177e4 2092#ifdef CY_DEBUG_DTR
21719191
JS		 2093 printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2094 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 2095 readb(base_addr + (CyMSVR1 << index)),
2096 readb(base_addr + (CyMSVR2 << index)));
1da177e4 2097#endif
02f1175c
JS		 2098 }
2099 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2100 /* it may be appropriate to clear _XMIT at
2101 some later date (after testing)!!! */
2102
77451e53
AC		 2103 if (info->port.tty)
2104 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
2105 info->port.flags &= ~ASYNC_INITIALIZED;
9fa1b3b1 2106 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2107 } else {
2108 struct FIRM_ID __iomem *firm_id;
2109 struct ZFW_CTRL __iomem *zfw_ctrl;
2110 struct BOARD_CTRL __iomem *board_ctrl;
2111 struct CH_CTRL __iomem *ch_ctrl;
2112 int retval;
2113
875b206b 2114 base_addr = card->base_addr;
1da177e4 2115#ifdef CY_DEBUG_OPEN
21719191
JS		 2116 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2117 "base_addr %p\n", card, channel, base_addr);
1da177e4
LT		 2118#endif
2119
02f1175c 2120 firm_id = base_addr + ID_ADDRESS;
2693f485 2121 if (!cyz_is_loaded(card))
02f1175c 2122 return;
1da177e4 2123
875b206b 2124 zfw_ctrl = card->base_addr +
db05c3b1 2125 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2126 board_ctrl = &zfw_ctrl->board_ctrl;
2127 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4 2128
9fa1b3b1 2129 spin_lock_irqsave(&card->card_lock, flags);
1da177e4 2130
77451e53 2131 if (info->port.xmit_buf) {
02f1175c 2132 unsigned char *temp;
77451e53
AC		 2133 temp = info->port.xmit_buf;
2134 info->port.xmit_buf = NULL;
02f1175c 2135 free_page((unsigned long)temp);
1da177e4 2136 }
02f1175c 2137
77451e53 2138 if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) {
02f1175c 2139 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1 2140 (__u32)(readl(&ch_ctrl[channel].rs_control) &
02f1175c 2141 ~(C_RS_RTS | C_RS_DTR)));
875b206b 2142 retval = cyz_issue_cmd(info->card, channel,
02f1175c
JS		 2143 C_CM_IOCTLM, 0L);
2144 if (retval != 0) {
21719191
JS		 2145 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2146 "was %x\n", info->line, retval);
02f1175c 2147 }
1da177e4 2148#ifdef CY_DEBUG_DTR
21719191 2149 printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
1da177e4 2150#endif
02f1175c 2151 }
1da177e4 2152
77451e53
AC		 2153 if (info->port.tty)
2154 set_bit(TTY_IO_ERROR, &info->port.tty->flags);
2155 info->port.flags &= ~ASYNC_INITIALIZED;
02f1175c 2156
9fa1b3b1 2157 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2158 }
1da177e4
LT		 2159
2160#ifdef CY_DEBUG_OPEN
21719191 2161 printk(KERN_DEBUG "cyc shutdown done\n");
1da177e4 2162#endif
02f1175c 2163} /* shutdown */
1da177e4
LT		 2164
2165/*
2166 * ------------------------------------------------------------
2167 * cy_open() and friends
2168 * ------------------------------------------------------------
2169 */
2170
2171static int
02f1175c
JS		 2172block_til_ready(struct tty_struct *tty, struct file *filp,
2173 struct cyclades_port *info)
1da177e4 2174{
02f1175c
JS		 2175 DECLARE_WAITQUEUE(wait, current);
2176 struct cyclades_card *cinfo;
2177 unsigned long flags;
2178 int chip, channel, index;
2179 int retval;
2180 void __iomem *base_addr;
2181
875b206b 2182 cinfo = info->card;
02f1175c
JS		 2183 channel = info->line - cinfo->first_line;
2184
2185 /*
2186 * If the device is in the middle of being closed, then block
2187 * until it's done, and then try again.
2188 */
77451e53
AC		 2189 if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
2190 wait_event_interruptible(info->port.close_wait,
2191 !(info->port.flags & ASYNC_CLOSING));
2192 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
1da177e4 2193 }
02f1175c
JS		 2194
2195 /*
2196 * If non-blocking mode is set, then make the check up front
2197 * and then exit.
2198 */
15ed6cc0
AC		 2199 if ((filp->f_flags & O_NONBLOCK) ||
2200 (tty->flags & (1 << TTY_IO_ERROR))) {
77451e53 2201 info->port.flags |= ASYNC_NORMAL_ACTIVE;
02f1175c
JS		 2202 return 0;
2203 }
2204
2205 /*
2206 * Block waiting for the carrier detect and the line to become
2207 * free (i.e., not in use by the callout). While we are in
77451e53 2208 * this loop, info->port.count is dropped by one, so that
02f1175c
JS		 2209 * cy_close() knows when to free things. We restore it upon
2210 * exit, either normal or abnormal.
2211 */
2212 retval = 0;
77451e53 2213 add_wait_queue(&info->port.open_wait, &wait);
1da177e4 2214#ifdef CY_DEBUG_OPEN
21719191 2215 printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
77451e53 2216 "count = %d\n", info->line, info->port.count);
1da177e4 2217#endif
9fa1b3b1 2218 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c 2219 if (!tty_hung_up_p(filp))
77451e53 2220 info->port.count--;
9fa1b3b1 2221 spin_unlock_irqrestore(&cinfo->card_lock, flags);
1da177e4 2222#ifdef CY_DEBUG_COUNT
21719191 2223 printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
77451e53 2224 "%d\n", current->pid, info->port.count);
1da177e4 2225#endif
77451e53 2226 info->port.blocked_open++;
02f1175c 2227
2693f485 2228 if (!cy_is_Z(cinfo)) {
02f1175c
JS		 2229 chip = channel >> 2;
2230 channel &= 0x03;
2231 index = cinfo->bus_index;
2232 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2233
2234 while (1) {
9fa1b3b1 2235 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 2236 if ((tty->termios->c_cflag & CBAUD)) {
2237 cy_writeb(base_addr + (CyCAR << index),
2238 (u_char) channel);
2239 cy_writeb(base_addr + (CyMSVR1 << index),
2240 CyRTS);
2241 cy_writeb(base_addr + (CyMSVR2 << index),
2242 CyDTR);
1da177e4 2243#ifdef CY_DEBUG_DTR
21719191
JS		 2244 printk(KERN_DEBUG "cyc:block_til_ready raising "
2245 "DTR\n");
2246 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 2247 readb(base_addr + (CyMSVR1 << index)),
2248 readb(base_addr + (CyMSVR2 << index)));
1da177e4 2249#endif
02f1175c 2250 }
9fa1b3b1 2251 spin_unlock_irqrestore(&cinfo->card_lock, flags);
1da177e4 2252
02f1175c
JS		 2253 set_current_state(TASK_INTERRUPTIBLE);
2254 if (tty_hung_up_p(filp) ||
77451e53
AC		 2255 !(info->port.flags & ASYNC_INITIALIZED)) {
2256 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
02f1175c
JS		 2257 -EAGAIN : -ERESTARTSYS);
2258 break;
2259 }
1da177e4 2260
9fa1b3b1 2261 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 2262 cy_writeb(base_addr + (CyCAR << index),
2263 (u_char) channel);
77451e53 2264 if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
db05c3b1 2265 (readb(base_addr +
02f1175c 2266 (CyMSVR1 << index)) & CyDCD))) {
9fa1b3b1 2267 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c
JS		 2268 break;
2269 }
9fa1b3b1 2270 spin_unlock_irqrestore(&cinfo->card_lock, flags);
1da177e4 2271
02f1175c
JS		 2272 if (signal_pending(current)) {
2273 retval = -ERESTARTSYS;
2274 break;
2275 }
1da177e4 2276#ifdef CY_DEBUG_OPEN
21719191
JS		 2277 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2278 "ttyC%d, count = %d\n",
77451e53 2279 info->line, info->port.count);
1da177e4 2280#endif
02f1175c 2281 schedule();
1da177e4 2282 }
02f1175c
JS		 2283 } else {
2284 struct FIRM_ID __iomem *firm_id;
2285 struct ZFW_CTRL __iomem *zfw_ctrl;
2286 struct BOARD_CTRL __iomem *board_ctrl;
2287 struct CH_CTRL __iomem *ch_ctrl;
02f1175c
JS		 2288
2289 base_addr = cinfo->base_addr;
2290 firm_id = base_addr + ID_ADDRESS;
2693f485 2291 if (!cyz_is_loaded(cinfo)) {
cc0a8fbb 2292 __set_current_state(TASK_RUNNING);
77451e53 2293 remove_wait_queue(&info->port.open_wait, &wait);
02f1175c
JS		 2294 return -EINVAL;
2295 }
2296
15ed6cc0
AC		 2297 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)
2298 & 0xfffff);
02f1175c
JS		 2299 board_ctrl = &zfw_ctrl->board_ctrl;
2300 ch_ctrl = zfw_ctrl->ch_ctrl;
2301
2302 while (1) {
2303 if ((tty->termios->c_cflag & CBAUD)) {
2304 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 2305 readl(&ch_ctrl[channel].rs_control) |
2306 C_RS_RTS | C_RS_DTR);
9fa1b3b1 2307 retval = cyz_issue_cmd(cinfo,
db05c3b1 2308 channel, C_CM_IOCTLM, 0L);
02f1175c 2309 if (retval != 0) {
21719191
JS		 2310 printk(KERN_ERR "cyc:block_til_ready "
2311 "retval on ttyC%d was %x\n",
02f1175c
JS		 2312 info->line, retval);
2313 }
1da177e4 2314#ifdef CY_DEBUG_DTR
21719191
JS		 2315 printk(KERN_DEBUG "cyc:block_til_ready raising "
2316 "Z DTR\n");
1da177e4 2317#endif
02f1175c 2318 }
1da177e4 2319
02f1175c
JS		 2320 set_current_state(TASK_INTERRUPTIBLE);
2321 if (tty_hung_up_p(filp) ||
77451e53
AC		 2322 !(info->port.flags & ASYNC_INITIALIZED)) {
2323 retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
02f1175c
JS		 2324 -EAGAIN : -ERESTARTSYS);
2325 break;
2326 }
77451e53 2327 if (!(info->port.flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
db05c3b1 2328 (readl(&ch_ctrl[channel].rs_status) &
02f1175c
JS		 2329 C_RS_DCD))) {
2330 break;
2331 }
2332 if (signal_pending(current)) {
2333 retval = -ERESTARTSYS;
2334 break;
2335 }
1da177e4 2336#ifdef CY_DEBUG_OPEN
21719191
JS		 2337 printk(KERN_DEBUG "cyc block_til_ready blocking: "
2338 "ttyC%d, count = %d\n",
77451e53 2339 info->line, info->port.count);
1da177e4 2340#endif
02f1175c
JS		 2341 schedule();
2342 }
1da177e4 2343 }
cc0a8fbb 2344 __set_current_state(TASK_RUNNING);
77451e53 2345 remove_wait_queue(&info->port.open_wait, &wait);
02f1175c 2346 if (!tty_hung_up_p(filp)) {
77451e53 2347 info->port.count++;
1da177e4 2348#ifdef CY_DEBUG_COUNT
21719191 2349 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
77451e53 2350 "count to %d\n", current->pid, info->port.count);
1da177e4 2351#endif
02f1175c 2352 }
77451e53 2353 info->port.blocked_open--;
1da177e4 2354#ifdef CY_DEBUG_OPEN
21719191 2355 printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
77451e53 2356 "count = %d\n", info->line, info->port.count);
1da177e4 2357#endif
02f1175c
JS		 2358 if (retval)
2359 return retval;
77451e53 2360 info->port.flags |= ASYNC_NORMAL_ACTIVE;
02f1175c
JS		 2361 return 0;
2362} /* block_til_ready */
1da177e4
LT		 2363
2364/*
2365 * This routine is called whenever a serial port is opened. It
2366 * performs the serial-specific initialization for the tty structure.
2367 */
02f1175c 2368static int cy_open(struct tty_struct *tty, struct file *filp)
1da177e4 2369{
02f1175c 2370 struct cyclades_port *info;
65f76a82
JS		 2371 unsigned int i, line;
2372 int retval;
1da177e4 2373
02f1175c 2374 line = tty->index;
15ed6cc0 2375 if (tty->index < 0 || NR_PORTS <= line)
02f1175c 2376 return -ENODEV;
15ed6cc0 2377
dd025c0c
JS		 2378 for (i = 0; i < NR_CARDS; i++)
2379 if (line < cy_card[i].first_line + cy_card[i].nports &&
2380 line >= cy_card[i].first_line)
2381 break;
2382 if (i >= NR_CARDS)
2383 return -ENODEV;
2384 info = &cy_card[i].ports[line - cy_card[i].first_line];
15ed6cc0 2385 if (info->line < 0)
02f1175c 2386 return -ENODEV;
1da177e4 2387
02f1175c
JS		 2388 /* If the card's firmware hasn't been loaded,
2389 treat it as absent from the system. This
2390 will make the user pay attention.
2391 */
2693f485 2392 if (cy_is_Z(info->card)) {
875b206b 2393 struct cyclades_card *cinfo = info->card;
02f1175c
JS		 2394 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2395
2693f485
JS		 2396 if (!cyz_is_loaded(cinfo)) {
2397 if (cinfo->hw_ver == ZE_V1 && cyz_fpga_loaded(cinfo) &&
101b8159
JS		 2398 readl(&firm_id->signature) ==
2399 ZFIRM_HLT) {
21719191
JS		 2400 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2401 "need an external power supply for "
2402 "this number of ports.\nFirmware "
2403 "halted.\n");
02f1175c 2404 } else {
21719191
JS		 2405 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2406 "yet loaded\n");
02f1175c
JS		 2407 }
2408 return -ENODEV;
2409 }
2410#ifdef CONFIG_CYZ_INTR
2411 else {
2412 /* In case this Z board is operating in interrupt mode, its
2413 interrupts should be enabled as soon as the first open
2414 happens to one of its ports. */
2415 if (!cinfo->intr_enabled) {
2416 struct ZFW_CTRL __iomem *zfw_ctrl;
2417 struct BOARD_CTRL __iomem *board_ctrl;
97e87f8e 2418 u16 intr;
02f1175c
JS		 2419
2420 zfw_ctrl = cinfo->base_addr +
db05c3b1
JS		 2421 (readl(&firm_id->zfwctrl_addr) &
2422 0xfffff);
02f1175c
JS		 2423
2424 board_ctrl = &zfw_ctrl->board_ctrl;
2425
2426 /* Enable interrupts on the PLX chip */
97e87f8e
JS		 2427 intr = readw(&cinfo->ctl_addr.p9060->
2428 intr_ctrl_stat) | 0x0900;
2429 cy_writew(&cinfo->ctl_addr.p9060->
2430 intr_ctrl_stat, intr);
02f1175c
JS		 2431 /* Enable interrupts on the FW */
2432 retval = cyz_issue_cmd(cinfo, 0,
2433 C_CM_IRQ_ENBL, 0L);
2434 if (retval != 0) {
21719191
JS		 2435 printk(KERN_ERR "cyc:IRQ enable retval "
2436 "was %x\n", retval);
02f1175c
JS		 2437 }
2438 cinfo->nports =
db05c3b1 2439 (int)readl(&board_ctrl->n_channel);
02f1175c
JS		 2440 cinfo->intr_enabled = 1;
2441 }
1da177e4 2442 }
02f1175c
JS		 2443#endif /* CONFIG_CYZ_INTR */
2444 /* Make sure this Z port really exists in hardware */
2445 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2446 return -ENODEV;
1da177e4 2447 }
1da177e4 2448#ifdef CY_DEBUG_OTHER
21719191 2449 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
1da177e4 2450#endif
02f1175c 2451 tty->driver_data = info;
77451e53 2452 info->port.tty = tty;
15ed6cc0 2453 if (serial_paranoia_check(info, tty->name, "cy_open"))
02f1175c 2454 return -ENODEV;
15ed6cc0 2455
1da177e4 2456#ifdef CY_DEBUG_OPEN
21719191 2457 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
77451e53 2458 info->port.count);
1da177e4 2459#endif
77451e53 2460 info->port.count++;
1da177e4 2461#ifdef CY_DEBUG_COUNT
21719191 2462 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
77451e53 2463 current->pid, info->port.count);
1da177e4 2464#endif
1da177e4 2465
02f1175c
JS		 2466 /*
2467 * If the port is the middle of closing, bail out now
2468 */
77451e53
AC		 2469 if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
2470 wait_event_interruptible(info->port.close_wait,
2471 !(info->port.flags & ASYNC_CLOSING));
2472 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
02f1175c 2473 }
1da177e4 2474
02f1175c
JS		 2475 /*
2476 * Start up serial port
2477 */
2478 retval = startup(info);
15ed6cc0 2479 if (retval)
02f1175c 2480 return retval;
1da177e4 2481
02f1175c
JS		 2482 retval = block_til_ready(tty, filp, info);
2483 if (retval) {
1da177e4 2484#ifdef CY_DEBUG_OPEN
21719191
JS		 2485 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2486 "with %d\n", retval);
1da177e4 2487#endif
02f1175c
JS		 2488 return retval;
2489 }
1da177e4 2490
02f1175c 2491 info->throttle = 0;
1da177e4 2492
02f1175c 2493#ifdef CY_DEBUG_OPEN
21719191 2494 printk(KERN_DEBUG "cyc:cy_open done\n");
02f1175c
JS		 2495#endif
2496 return 0;
2497} /* cy_open */
1da177e4
LT		 2498
2499/*
2500 * cy_wait_until_sent() --- wait until the transmitter is empty
2501 */
02f1175c 2502static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
1da177e4 2503{
875b206b 2504 struct cyclades_card *card;
cab9bdd1 2505 struct cyclades_port *info = tty->driver_data;
02f1175c 2506 void __iomem *base_addr;
875b206b 2507 int chip, channel, index;
02f1175c
JS		 2508 unsigned long orig_jiffies;
2509 int char_time;
2510
2511 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2512 return;
2513
2514 if (info->xmit_fifo_size == 0)
2515 return; /* Just in case.... */
1da177e4 2516
02f1175c 2517 orig_jiffies = jiffies;
978e595f 2518 lock_kernel();
02f1175c
JS		 2519 /*
2520 * Set the check interval to be 1/5 of the estimated time to
2521 * send a single character, and make it at least 1. The check
2522 * interval should also be less than the timeout.
2523 *
2524 * Note: we have to use pretty tight timings here to satisfy
2525 * the NIST-PCTS.
2526 */
2527 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2528 char_time = char_time / 5;
2529 if (char_time <= 0)
2530 char_time = 1;
2531 if (timeout < 0)
2532 timeout = 0;
2533 if (timeout)
2534 char_time = min(char_time, timeout);
2535 /*
2536 * If the transmitter hasn't cleared in twice the approximate
2537 * amount of time to send the entire FIFO, it probably won't
2538 * ever clear. This assumes the UART isn't doing flow
2539 * control, which is currently the case. Hence, if it ever
2540 * takes longer than info->timeout, this is probably due to a
2541 * UART bug of some kind. So, we clamp the timeout parameter at
2542 * 2*info->timeout.
2543 */
2544 if (!timeout || timeout > 2 * info->timeout)
2545 timeout = 2 * info->timeout;
1da177e4 2546#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191
JS		 2547 printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2548 timeout, char_time, jiffies);
1da177e4 2549#endif
02f1175c 2550 card = info->card;
875b206b 2551 channel = (info->line) - (card->first_line);
2693f485 2552 if (!cy_is_Z(card)) {
02f1175c
JS		 2553 chip = channel >> 2;
2554 channel &= 0x03;
875b206b
JS		 2555 index = card->bus_index;
2556 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
db05c3b1 2557 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
1da177e4 2558#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191 2559 printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
1da177e4 2560#endif
02f1175c
JS		 2561 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2562 break;
2563 if (timeout && time_after(jiffies, orig_jiffies +
2564 timeout))
2565 break;
2566 }
1da177e4 2567 }
02f1175c
JS		 2568 /* Run one more char cycle */
2569 msleep_interruptible(jiffies_to_msecs(char_time * 5));
978e595f 2570 unlock_kernel();
1da177e4 2571#ifdef CY_DEBUG_WAIT_UNTIL_SENT
21719191 2572 printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
1da177e4
LT		 2573#endif
2574}
2575
978e595f
AC		 2576static void cy_flush_buffer(struct tty_struct *tty)
2577{
2578 struct cyclades_port *info = tty->driver_data;
2579 struct cyclades_card *card;
2580 int channel, retval;
2581 unsigned long flags;
2582
2583#ifdef CY_DEBUG_IO
2584 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
2585#endif
2586
2587 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
2588 return;
2589
2590 card = info->card;
2591 channel = info->line - card->first_line;
2592
2593 spin_lock_irqsave(&card->card_lock, flags);
2594 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2595 spin_unlock_irqrestore(&card->card_lock, flags);
2596
2693f485 2597 if (cy_is_Z(card)) { /* If it is a Z card, flush the on-board
978e595f
AC		 2598 buffers as well */
2599 spin_lock_irqsave(&card->card_lock, flags);
2600 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
2601 if (retval != 0) {
2602 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
2603 "was %x\n", info->line, retval);
2604 }
2605 spin_unlock_irqrestore(&card->card_lock, flags);
2606 }
2607 tty_wakeup(tty);
2608} /* cy_flush_buffer */
2609
2610
1da177e4
LT		 2611/*
2612 * This routine is called when a particular tty device is closed.
2613 */
02f1175c 2614static void cy_close(struct tty_struct *tty, struct file *filp)
1da177e4 2615{
cab9bdd1 2616 struct cyclades_port *info = tty->driver_data;
9fa1b3b1 2617 struct cyclades_card *card;
02f1175c 2618 unsigned long flags;
1da177e4
LT		 2619
2620#ifdef CY_DEBUG_OTHER
21719191 2621 printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
1da177e4
LT		 2622#endif
2623
15ed6cc0 2624 if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
02f1175c 2625 return;
1da177e4 2626
9fa1b3b1
JS		 2627 card = info->card;
2628
2629 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2630 /* If the TTY is being hung up, nothing to do */
2631 if (tty_hung_up_p(filp)) {
9fa1b3b1 2632 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2633 return;
2634 }
1da177e4 2635#ifdef CY_DEBUG_OPEN
21719191 2636 printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
77451e53 2637 info->port.count);
1da177e4 2638#endif
77451e53 2639 if ((tty->count == 1) && (info->port.count != 1)) {
02f1175c
JS		 2640 /*
2641 * Uh, oh. tty->count is 1, which means that the tty
2642 * structure will be freed. Info->count should always
2643 * be one in these conditions. If it's greater than
2644 * one, we've got real problems, since it means the
2645 * serial port won't be shutdown.
2646 */
21719191 2647 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
77451e53
AC		 2648 "tty->count is 1, info->port.count is %d\n", info->port.count);
2649 info->port.count = 1;
02f1175c 2650 }
1da177e4 2651#ifdef CY_DEBUG_COUNT
21719191 2652 printk(KERN_DEBUG "cyc:cy_close at (%d): decrementing count to %d\n",
77451e53 2653 current->pid, info->port.count - 1);
1da177e4 2654#endif
77451e53 2655 if (--info->port.count < 0) {
1da177e4 2656#ifdef CY_DEBUG_COUNT
21719191 2657 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
1da177e4 2658#endif
77451e53 2659 info->port.count = 0;
1da177e4 2660 }
77451e53 2661 if (info->port.count) {
9fa1b3b1 2662 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 2663 return;
2664 }
77451e53 2665 info->port.flags |= ASYNC_CLOSING;
1da177e4 2666
02f1175c
JS		 2667 /*
2668 * Now we wait for the transmit buffer to clear; and we notify
2669 * the line discipline to only process XON/XOFF characters.
2670 */
2671 tty->closing = 1;
9fa1b3b1 2672 spin_unlock_irqrestore(&card->card_lock, flags);
44b7d1b3
AC		 2673 if (info->port.closing_wait != CY_CLOSING_WAIT_NONE)
2674 tty_wait_until_sent(tty, info->port.closing_wait);
15ed6cc0 2675
9fa1b3b1 2676 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 2677
2693f485 2678 if (!cy_is_Z(card)) {
9fa1b3b1
JS		 2679 int channel = info->line - card->first_line;
2680 int index = card->bus_index;
2681 void __iomem *base_addr = card->base_addr +
02f1175c
JS		 2682 (cy_chip_offset[channel >> 2] << index);
2683 /* Stop accepting input */
2684 channel &= 0x03;
2685 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2686 cy_writeb(base_addr + (CySRER << index),
db05c3b1 2687 readb(base_addr + (CySRER << index)) & ~CyRxData);
77451e53 2688 if (info->port.flags & ASYNC_INITIALIZED) {
15ed6cc0
AC		 2689 /* Waiting for on-board buffers to be empty before
2690 closing the port */
9fa1b3b1 2691 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2692 cy_wait_until_sent(tty, info->timeout);
9fa1b3b1 2693 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2694 }
2695 } else {
2696#ifdef Z_WAKE
15ed6cc0
AC		 2697 /* Waiting for on-board buffers to be empty before closing
2698 the port */
9fa1b3b1 2699 void __iomem *base_addr = card->base_addr;
02f1175c
JS		 2700 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2701 struct ZFW_CTRL __iomem *zfw_ctrl =
db05c3b1 2702 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c 2703 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
9fa1b3b1 2704 int channel = info->line - card->first_line;
02f1175c
JS		 2705 int retval;
2706
db05c3b1 2707 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
9fa1b3b1 2708 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
02f1175c 2709 if (retval != 0) {
21719191
JS		 2710 printk(KERN_DEBUG "cyc:cy_close retval on "
2711 "ttyC%d was %x\n", info->line, retval);
02f1175c 2712 }
9fa1b3b1 2713 spin_unlock_irqrestore(&card->card_lock, flags);
2c7fea99 2714 wait_for_completion_interruptible(&info->shutdown_wait);
9fa1b3b1 2715 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 2716 }
1da177e4 2717#endif
02f1175c
JS		 2718 }
2719
9fa1b3b1 2720 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2721 shutdown(info);
978e595f 2722 cy_flush_buffer(tty);
02f1175c 2723 tty_ldisc_flush(tty);
9fa1b3b1 2724 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 2725
2726 tty->closing = 0;
77451e53
AC		 2727 info->port.tty = NULL;
2728 if (info->port.blocked_open) {
9fa1b3b1 2729 spin_unlock_irqrestore(&card->card_lock, flags);
44b7d1b3 2730 if (info->port.close_delay) {
02f1175c 2731 msleep_interruptible(jiffies_to_msecs
44b7d1b3 2732 (info->port.close_delay));
02f1175c 2733 }
77451e53 2734 wake_up_interruptible(&info->port.open_wait);
9fa1b3b1 2735 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 2736 }
77451e53
AC		 2737 info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2738 wake_up_interruptible(&info->port.close_wait);
1da177e4
LT		 2739
2740#ifdef CY_DEBUG_OTHER
21719191 2741 printk(KERN_DEBUG "cyc:cy_close done\n");
1da177e4
LT		 2742#endif
2743
9fa1b3b1 2744 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 2745} /* cy_close */
1da177e4
LT		 2746
2747/* This routine gets called when tty_write has put something into
2748 * the write_queue. The characters may come from user space or
2749 * kernel space.
2750 *
2751 * This routine will return the number of characters actually
2752 * accepted for writing.
2753 *
2754 * If the port is not already transmitting stuff, start it off by
2755 * enabling interrupts. The interrupt service routine will then
2756 * ensure that the characters are sent.
2757 * If the port is already active, there is no need to kick it.
2758 *
2759 */
02f1175c 2760static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1da177e4 2761{
cab9bdd1 2762 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 2763 unsigned long flags;
2764 int c, ret = 0;
1da177e4
LT		 2765
2766#ifdef CY_DEBUG_IO
21719191 2767 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
1da177e4
LT		 2768#endif
2769
15ed6cc0 2770 if (serial_paranoia_check(info, tty->name, "cy_write"))
02f1175c 2771 return 0;
1da177e4 2772
77451e53 2773 if (!info->port.xmit_buf)
02f1175c 2774 return 0;
1da177e4 2775
9fa1b3b1 2776 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 2777 while (1) {
1a4e2351
HH		 2778 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
2779 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
02f1175c
JS		 2780
2781 if (c <= 0)
2782 break;
2783
77451e53 2784 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
02f1175c
JS		 2785 info->xmit_head = (info->xmit_head + c) &
2786 (SERIAL_XMIT_SIZE - 1);
2787 info->xmit_cnt += c;
2788 buf += c;
2789 count -= c;
2790 ret += c;
2791 }
9fa1b3b1 2792 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c
JS		 2793
2794 info->idle_stats.xmit_bytes += ret;
2795 info->idle_stats.xmit_idle = jiffies;
2796
15ed6cc0 2797 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
02f1175c 2798 start_xmit(info);
15ed6cc0 2799
02f1175c
JS		 2800 return ret;
2801} /* cy_write */
1da177e4
LT		 2802
2803/*
2804 * This routine is called by the kernel to write a single
2805 * character to the tty device. If the kernel uses this routine,
2806 * it must call the flush_chars() routine (if defined) when it is
2807 * done stuffing characters into the driver. If there is no room
2808 * in the queue, the character is ignored.
2809 */
76b25a55 2810static int cy_put_char(struct tty_struct *tty, unsigned char ch)
1da177e4 2811{
cab9bdd1 2812 struct cyclades_port *info = tty->driver_data;
02f1175c 2813 unsigned long flags;
1da177e4
LT		 2814
2815#ifdef CY_DEBUG_IO
21719191 2816 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
1da177e4
LT		 2817#endif
2818
02f1175c 2819 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
76b25a55 2820 return 0;
1da177e4 2821
77451e53 2822 if (!info->port.xmit_buf)
76b25a55 2823 return 0;
1da177e4 2824
9fa1b3b1 2825 spin_lock_irqsave(&info->card->card_lock, flags);
90cc3018 2826 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
9fa1b3b1 2827 spin_unlock_irqrestore(&info->card->card_lock, flags);
76b25a55 2828 return 0;
02f1175c 2829 }
1da177e4 2830
77451e53 2831 info->port.xmit_buf[info->xmit_head++] = ch;
02f1175c
JS		 2832 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2833 info->xmit_cnt++;
1da177e4
LT		 2834 info->idle_stats.xmit_bytes++;
2835 info->idle_stats.xmit_idle = jiffies;
9fa1b3b1 2836 spin_unlock_irqrestore(&info->card->card_lock, flags);
76b25a55 2837 return 1;
02f1175c 2838} /* cy_put_char */
1da177e4
LT		 2839
2840/*
2841 * This routine is called by the kernel after it has written a
15ed6cc0 2842 * series of characters to the tty device using put_char().
1da177e4 2843 */
02f1175c 2844static void cy_flush_chars(struct tty_struct *tty)
1da177e4 2845{
cab9bdd1 2846 struct cyclades_port *info = tty->driver_data;
02f1175c 2847
1da177e4 2848#ifdef CY_DEBUG_IO
21719191 2849 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
1da177e4
LT		 2850#endif
2851
02f1175c
JS		 2852 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2853 return;
1da177e4 2854
02f1175c 2855 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
77451e53 2856 !info->port.xmit_buf)
02f1175c 2857 return;
1da177e4 2858
02f1175c
JS		 2859 start_xmit(info);
2860} /* cy_flush_chars */
1da177e4
LT		 2861
2862/*
2863 * This routine returns the numbers of characters the tty driver
2864 * will accept for queuing to be written. This number is subject
2865 * to change as output buffers get emptied, or if the output flow
2866 * control is activated.
2867 */
02f1175c 2868static int cy_write_room(struct tty_struct *tty)
1da177e4 2869{
cab9bdd1 2870 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 2871 int ret;
2872
1da177e4 2873#ifdef CY_DEBUG_IO
21719191 2874 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
1da177e4
LT		 2875#endif
2876
02f1175c
JS		 2877 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2878 return 0;
2879 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2880 if (ret < 0)
2881 ret = 0;
2882 return ret;
2883} /* cy_write_room */
1da177e4 2884
02f1175c 2885static int cy_chars_in_buffer(struct tty_struct *tty)
1da177e4 2886{
875b206b 2887 struct cyclades_card *card;
cab9bdd1 2888 struct cyclades_port *info = tty->driver_data;
875b206b 2889 int channel;
1da177e4 2890
02f1175c
JS		 2891 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2892 return 0;
2893
2894 card = info->card;
875b206b 2895 channel = (info->line) - (card->first_line);
1da177e4
LT		 2896
2897#ifdef Z_EXT_CHARS_IN_BUFFER
2693f485 2898 if (!cy_is_Z(card)) {
02f1175c 2899#endif /* Z_EXT_CHARS_IN_BUFFER */
1da177e4 2900#ifdef CY_DEBUG_IO
21719191
JS		 2901 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2902 info->line, info->xmit_cnt);
1da177e4 2903#endif
02f1175c 2904 return info->xmit_cnt;
1da177e4 2905#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c 2906 } else {
ad39c300
JS		 2907 static struct FIRM_ID *firm_id;
2908 static struct ZFW_CTRL *zfw_ctrl;
2909 static struct CH_CTRL *ch_ctrl;
2910 static struct BUF_CTRL *buf_ctrl;
02f1175c 2911 int char_count;
ad39c300 2912 __u32 tx_put, tx_get, tx_bufsize;
02f1175c 2913
978e595f 2914 lock_kernel();
875b206b
JS		 2915 firm_id = card->base_addr + ID_ADDRESS;
2916 zfw_ctrl = card->base_addr +
db05c3b1 2917 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 2918 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
2919 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
2920
db05c3b1
JS		 2921 tx_get = readl(&buf_ctrl->tx_get);
2922 tx_put = readl(&buf_ctrl->tx_put);
2923 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
02f1175c
JS		 2924 if (tx_put >= tx_get)
2925 char_count = tx_put - tx_get;
2926 else
2927 char_count = tx_put - tx_get + tx_bufsize;
1da177e4 2928#ifdef CY_DEBUG_IO
21719191
JS		 2929 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2930 info->line, info->xmit_cnt + char_count);
1da177e4 2931#endif
978e595f 2932 unlock_kernel();
096dcfce 2933 return info->xmit_cnt + char_count;
02f1175c
JS		 2934 }
2935#endif /* Z_EXT_CHARS_IN_BUFFER */
2936} /* cy_chars_in_buffer */
1da177e4
LT		 2937
2938/*
2939 * ------------------------------------------------------------
2940 * cy_ioctl() and friends
2941 * ------------------------------------------------------------
2942 */
2943
1a86b5e3 2944static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
1da177e4 2945{
02f1175c 2946 int co, co_val, bpr;
1a86b5e3 2947 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
02f1175c 2948 25000000);
1da177e4 2949
02f1175c
JS		 2950 if (baud == 0) {
2951 info->tbpr = info->tco = info->rbpr = info->rco = 0;
2952 return;
2953 }
1da177e4 2954
02f1175c
JS		 2955 /* determine which prescaler to use */
2956 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
2957 if (cy_clock / co_val / baud > 63)
2958 break;
2959 }
1da177e4 2960
02f1175c
JS		 2961 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
2962 if (bpr > 255)
2963 bpr = 255;
1da177e4 2964
02f1175c
JS		 2965 info->tbpr = info->rbpr = bpr;
2966 info->tco = info->rco = co;
1da177e4
LT		 2967}
2968
2969/*
2970 * This routine finds or computes the various line characteristics.
2971 * It used to be called config_setup
2972 */
02f1175c 2973static void set_line_char(struct cyclades_port *info)
1da177e4 2974{
875b206b 2975 struct cyclades_card *card;
02f1175c
JS		 2976 unsigned long flags;
2977 void __iomem *base_addr;
875b206b 2978 int chip, channel, index;
02f1175c
JS		 2979 unsigned cflag, iflag;
2980 unsigned short chip_number;
2981 int baud, baud_rate = 0;
2982 int i;
2983
77451e53 2984 if (!info->port.tty || !info->port.tty->termios)
02f1175c 2985 return;
15ed6cc0
AC		 2986
2987 if (info->line == -1)
02f1175c 2988 return;
15ed6cc0 2989
77451e53
AC		 2990 cflag = info->port.tty->termios->c_cflag;
2991 iflag = info->port.tty->termios->c_iflag;
1da177e4 2992
02f1175c
JS		 2993 /*
2994 * Set up the tty->alt_speed kludge
2995 */
77451e53
AC		 2996 if (info->port.tty) {
2997 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2998 info->port.tty->alt_speed = 57600;
2999 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3000 info->port.tty->alt_speed = 115200;
3001 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3002 info->port.tty->alt_speed = 230400;
3003 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3004 info->port.tty->alt_speed = 460800;
1da177e4 3005 }
02f1175c
JS		 3006
3007 card = info->card;
875b206b 3008 channel = info->line - card->first_line;
02f1175c
JS		 3009 chip_number = channel / 4;
3010
2693f485 3011 if (!cy_is_Z(card)) {
02f1175c 3012
875b206b 3013 index = card->bus_index;
02f1175c
JS		 3014
3015 /* baud rate */
77451e53
AC		 3016 baud = tty_get_baud_rate(info->port.tty);
3017 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
02f1175c
JS		 3018 ASYNC_SPD_CUST) {
3019 if (info->custom_divisor)
3020 baud_rate = info->baud / info->custom_divisor;
3021 else
3022 baud_rate = info->baud;
3023 } else if (baud > CD1400_MAX_SPEED) {
3024 baud = CD1400_MAX_SPEED;
3025 }
3026 /* find the baud index */
3027 for (i = 0; i < 20; i++) {
15ed6cc0 3028 if (baud == baud_table[i])
02f1175c 3029 break;
02f1175c 3030 }
15ed6cc0 3031 if (i == 20)
02f1175c 3032 i = 19; /* CD1400_MAX_SPEED */
02f1175c 3033
77451e53 3034 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
02f1175c
JS		 3035 ASYNC_SPD_CUST) {
3036 cyy_baud_calc(info, baud_rate);
3037 } else {
3038 if (info->chip_rev >= CD1400_REV_J) {
3039 /* It is a CD1400 rev. J or later */
3040 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3041 info->tco = baud_co_60[i]; /* Tx CO */
3042 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3043 info->rco = baud_co_60[i]; /* Rx CO */
3044 } else {
3045 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3046 info->tco = baud_co_25[i]; /* Tx CO */
3047 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3048 info->rco = baud_co_25[i]; /* Rx CO */
3049 }
3050 }
3051 if (baud_table[i] == 134) {
3052 /* get it right for 134.5 baud */
3053 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3054 2;
77451e53 3055 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
02f1175c
JS		 3056 ASYNC_SPD_CUST) {
3057 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3058 baud_rate) + 2;
3059 } else if (baud_table[i]) {
3060 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3061 baud_table[i]) + 2;
3062 /* this needs to be propagated into the card info */
3063 } else {
3064 info->timeout = 0;
3065 }
3066 /* By tradition (is it a standard?) a baud rate of zero
3067 implies the line should be/has been closed. A bit
3068 later in this routine such a test is performed. */
3069
3070 /* byte size and parity */
3071 info->cor5 = 0;
3072 info->cor4 = 0;
3073 /* receive threshold */
3074 info->cor3 = (info->default_threshold ?
3075 info->default_threshold : baud_cor3[i]);
3076 info->cor2 = CyETC;
3077 switch (cflag & CSIZE) {
3078 case CS5:
3079 info->cor1 = Cy_5_BITS;
3080 break;
3081 case CS6:
3082 info->cor1 = Cy_6_BITS;
3083 break;
3084 case CS7:
3085 info->cor1 = Cy_7_BITS;
3086 break;
3087 case CS8:
3088 info->cor1 = Cy_8_BITS;
3089 break;
3090 }
15ed6cc0 3091 if (cflag & CSTOPB)
02f1175c 3092 info->cor1 |= Cy_2_STOP;
15ed6cc0 3093
02f1175c 3094 if (cflag & PARENB) {
15ed6cc0 3095 if (cflag & PARODD)
02f1175c 3096 info->cor1 |= CyPARITY_O;
15ed6cc0 3097 else
02f1175c 3098 info->cor1 |= CyPARITY_E;
15ed6cc0 3099 } else
02f1175c 3100 info->cor1 |= CyPARITY_NONE;
02f1175c
JS		 3101
3102 /* CTS flow control flag */
3103 if (cflag & CRTSCTS) {
77451e53 3104 info->port.flags |= ASYNC_CTS_FLOW;
02f1175c
JS		 3105 info->cor2 |= CyCtsAE;
3106 } else {
77451e53 3107 info->port.flags &= ~ASYNC_CTS_FLOW;
02f1175c
JS		 3108 info->cor2 &= ~CyCtsAE;
3109 }
3110 if (cflag & CLOCAL)
77451e53 3111 info->port.flags &= ~ASYNC_CHECK_CD;
02f1175c 3112 else
77451e53 3113 info->port.flags |= ASYNC_CHECK_CD;
1da177e4
LT		 3114
3115 /***********************************************
3116 The hardware option, CyRtsAO, presents RTS when
3117 the chip has characters to send. Since most modems
3118 use RTS as reverse (inbound) flow control, this
3119 option is not used. If inbound flow control is
3120 necessary, DTR can be programmed to provide the
3121 appropriate signals for use with a non-standard
3122 cable. Contact Marcio Saito for details.
3123 ***********************************************/
3124
02f1175c
JS		 3125 chip = channel >> 2;
3126 channel &= 0x03;
875b206b 3127 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4 3128
9fa1b3b1 3129 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3130 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3131
3132 /* tx and rx baud rate */
3133
3134 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3135 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3136 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3137 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3138
3139 /* set line characteristics according configuration */
3140
3141 cy_writeb(base_addr + (CySCHR1 << index),
77451e53
AC		 3142 START_CHAR(info->port.tty));
3143 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->port.tty));
02f1175c
JS		 3144 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3145 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3146 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3147 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3148 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3149
3150 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3151 CyCOR3ch, index);
3152
15ed6cc0
AC		 3153 /* !!! Is this needed? */
3154 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
02f1175c
JS		 3155 cy_writeb(base_addr + (CyRTPR << index),
3156 (info->default_timeout ? info->default_timeout : 0x02));
3157 /* 10ms rx timeout */
3158
77451e53 3159 if (C_CLOCAL(info->port.tty)) {
02f1175c
JS		 3160 /* without modem intr */
3161 cy_writeb(base_addr + (CySRER << index),
db05c3b1 3162 readb(base_addr + (CySRER << index)) | CyMdmCh);
02f1175c
JS		 3163 /* act on 1->0 modem transitions */
3164 if ((cflag & CRTSCTS) && info->rflow) {
3165 cy_writeb(base_addr + (CyMCOR1 << index),
3166 (CyCTS | rflow_thr[i]));
3167 } else {
3168 cy_writeb(base_addr + (CyMCOR1 << index),
3169 CyCTS);
3170 }
3171 /* act on 0->1 modem transitions */
3172 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
1da177e4 3173 } else {
02f1175c
JS		 3174 /* without modem intr */
3175 cy_writeb(base_addr + (CySRER << index),
db05c3b1 3176 readb(base_addr +
02f1175c
JS		 3177 (CySRER << index)) | CyMdmCh);
3178 /* act on 1->0 modem transitions */
3179 if ((cflag & CRTSCTS) && info->rflow) {
3180 cy_writeb(base_addr + (CyMCOR1 << index),
3181 (CyDSR | CyCTS | CyRI | CyDCD |
3182 rflow_thr[i]));
3183 } else {
3184 cy_writeb(base_addr + (CyMCOR1 << index),
3185 CyDSR | CyCTS | CyRI | CyDCD);
3186 }
3187 /* act on 0->1 modem transitions */
3188 cy_writeb(base_addr + (CyMCOR2 << index),
3189 CyDSR | CyCTS | CyRI | CyDCD);
1da177e4 3190 }
02f1175c
JS		 3191
3192 if (i == 0) { /* baud rate is zero, turn off line */
3193 if (info->rtsdtr_inv) {
3194 cy_writeb(base_addr + (CyMSVR1 << index),
3195 ~CyRTS);
3196 } else {
3197 cy_writeb(base_addr + (CyMSVR2 << index),
3198 ~CyDTR);
3199 }
1da177e4 3200#ifdef CY_DEBUG_DTR
21719191
JS		 3201 printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3202 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3203 readb(base_addr + (CyMSVR1 << index)),
3204 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3205#endif
02f1175c
JS		 3206 } else {
3207 if (info->rtsdtr_inv) {
3208 cy_writeb(base_addr + (CyMSVR1 << index),
3209 CyRTS);
3210 } else {
3211 cy_writeb(base_addr + (CyMSVR2 << index),
3212 CyDTR);
3213 }
1da177e4 3214#ifdef CY_DEBUG_DTR
21719191
JS		 3215 printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3216 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3217 readb(base_addr + (CyMSVR1 << index)),
3218 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3219#endif
02f1175c 3220 }
1da177e4 3221
77451e53
AC		 3222 if (info->port.tty)
3223 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
9fa1b3b1 3224 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 3225
1da177e4 3226 } else {
02f1175c
JS		 3227 struct FIRM_ID __iomem *firm_id;
3228 struct ZFW_CTRL __iomem *zfw_ctrl;
3229 struct BOARD_CTRL __iomem *board_ctrl;
3230 struct CH_CTRL __iomem *ch_ctrl;
3231 struct BUF_CTRL __iomem *buf_ctrl;
1a86b5e3 3232 __u32 sw_flow;
02f1175c 3233 int retval;
1da177e4 3234
875b206b 3235 firm_id = card->base_addr + ID_ADDRESS;
2693f485 3236 if (!cyz_is_loaded(card))
02f1175c 3237 return;
1da177e4 3238
875b206b 3239 zfw_ctrl = card->base_addr +
db05c3b1 3240 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3241 board_ctrl = &zfw_ctrl->board_ctrl;
3242 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3243 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3244
3245 /* baud rate */
77451e53
AC		 3246 baud = tty_get_baud_rate(info->port.tty);
3247 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
02f1175c
JS		 3248 ASYNC_SPD_CUST) {
3249 if (info->custom_divisor)
3250 baud_rate = info->baud / info->custom_divisor;
3251 else
3252 baud_rate = info->baud;
3253 } else if (baud > CYZ_MAX_SPEED) {
3254 baud = CYZ_MAX_SPEED;
3255 }
3256 cy_writel(&ch_ctrl->comm_baud, baud);
3257
3258 if (baud == 134) {
3259 /* get it right for 134.5 baud */
3260 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3261 2;
77451e53 3262 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
02f1175c
JS		 3263 ASYNC_SPD_CUST) {
3264 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3265 baud_rate) + 2;
3266 } else if (baud) {
3267 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3268 baud) + 2;
3269 /* this needs to be propagated into the card info */
3270 } else {
3271 info->timeout = 0;
3272 }
1da177e4 3273
02f1175c
JS		 3274 /* byte size and parity */
3275 switch (cflag & CSIZE) {
3276 case CS5:
3277 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3278 break;
3279 case CS6:
3280 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3281 break;
3282 case CS7:
3283 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3284 break;
3285 case CS8:
3286 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3287 break;
3288 }
3289 if (cflag & CSTOPB) {
3290 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 3291 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
02f1175c
JS		 3292 } else {
3293 cy_writel(&ch_ctrl->comm_data_l,
db05c3b1 3294 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
02f1175c
JS		 3295 }
3296 if (cflag & PARENB) {
15ed6cc0 3297 if (cflag & PARODD)
02f1175c 3298 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
15ed6cc0 3299 else
02f1175c 3300 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
15ed6cc0 3301 } else
02f1175c 3302 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
1da177e4 3303
02f1175c
JS		 3304 /* CTS flow control flag */
3305 if (cflag & CRTSCTS) {
3306 cy_writel(&ch_ctrl->hw_flow,
db05c3b1 3307 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
02f1175c 3308 } else {
db05c3b1
JS		 3309 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3310 ~(C_RS_CTS | C_RS_RTS));
02f1175c
JS		 3311 }
3312 /* As the HW flow control is done in firmware, the driver
3313 doesn't need to care about it */
77451e53 3314 info->port.flags &= ~ASYNC_CTS_FLOW;
02f1175c
JS		 3315
3316 /* XON/XOFF/XANY flow control flags */
3317 sw_flow = 0;
3318 if (iflag & IXON) {
3319 sw_flow |= C_FL_OXX;
3320 if (iflag & IXANY)
3321 sw_flow |= C_FL_OIXANY;
3322 }
3323 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3324
875b206b 3325 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
02f1175c 3326 if (retval != 0) {
21719191
JS		 3327 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3328 "was %x\n", info->line, retval);
02f1175c
JS		 3329 }
3330
3331 /* CD sensitivity */
15ed6cc0 3332 if (cflag & CLOCAL)
77451e53 3333 info->port.flags &= ~ASYNC_CHECK_CD;
15ed6cc0 3334 else
77451e53 3335 info->port.flags |= ASYNC_CHECK_CD;
1da177e4 3336
02f1175c
JS		 3337 if (baud == 0) { /* baud rate is zero, turn off line */
3338 cy_writel(&ch_ctrl->rs_control,
db05c3b1 3339 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
1da177e4 3340#ifdef CY_DEBUG_DTR
21719191 3341 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
1da177e4 3342#endif
02f1175c
JS		 3343 } else {
3344 cy_writel(&ch_ctrl->rs_control,
db05c3b1 3345 readl(&ch_ctrl->rs_control) | C_RS_DTR);
1da177e4 3346#ifdef CY_DEBUG_DTR
21719191 3347 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
1da177e4 3348#endif
02f1175c 3349 }
1da177e4 3350
15ed6cc0 3351 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
02f1175c 3352 if (retval != 0) {
21719191
JS		 3353 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3354 "was %x\n", info->line, retval);
02f1175c 3355 }
1da177e4 3356
77451e53
AC		 3357 if (info->port.tty)
3358 clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
1da177e4 3359 }
02f1175c 3360} /* set_line_char */
1da177e4
LT		 3361
3362static int
02f1175c 3363get_serial_info(struct cyclades_port *info,
15ed6cc0 3364 struct serial_struct __user *retinfo)
1da177e4 3365{
02f1175c 3366 struct serial_struct tmp;
875b206b 3367 struct cyclades_card *cinfo = info->card;
1da177e4 3368
02f1175c
JS		 3369 if (!retinfo)
3370 return -EFAULT;
3371 memset(&tmp, 0, sizeof(tmp));
3372 tmp.type = info->type;
3373 tmp.line = info->line;
875b206b
JS		 3374 tmp.port = (info->card - cy_card) * 0x100 + info->line -
3375 cinfo->first_line;
02f1175c 3376 tmp.irq = cinfo->irq;
77451e53 3377 tmp.flags = info->port.flags;
44b7d1b3
AC		 3378 tmp.close_delay = info->port.close_delay;
3379 tmp.closing_wait = info->port.closing_wait;
02f1175c
JS		 3380 tmp.baud_base = info->baud;
3381 tmp.custom_divisor = info->custom_divisor;
3382 tmp.hub6 = 0; /*!!! */
3383 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3384} /* get_serial_info */
1da177e4
LT		 3385
3386static int
02f1175c 3387set_serial_info(struct cyclades_port *info,
15ed6cc0 3388 struct serial_struct __user *new_info)
1da177e4 3389{
02f1175c
JS		 3390 struct serial_struct new_serial;
3391 struct cyclades_port old_info;
3392
3393 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3394 return -EFAULT;
3395 old_info = *info;
3396
3397 if (!capable(CAP_SYS_ADMIN)) {
44b7d1b3 3398 if (new_serial.close_delay != info->port.close_delay ||
02f1175c
JS		 3399 new_serial.baud_base != info->baud ||
3400 (new_serial.flags & ASYNC_FLAGS &
3401 ~ASYNC_USR_MASK) !=
77451e53 3402 (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
02f1175c 3403 return -EPERM;
77451e53 3404 info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
02f1175c
JS		 3405 (new_serial.flags & ASYNC_USR_MASK);
3406 info->baud = new_serial.baud_base;
3407 info->custom_divisor = new_serial.custom_divisor;
3408 goto check_and_exit;
3409 }
3410
3411 /*
3412 * OK, past this point, all the error checking has been done.
3413 * At this point, we start making changes.....
3414 */
3415
3416 info->baud = new_serial.baud_base;
3417 info->custom_divisor = new_serial.custom_divisor;
77451e53 3418 info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
02f1175c 3419 (new_serial.flags & ASYNC_FLAGS);
44b7d1b3
AC		 3420 info->port.close_delay = new_serial.close_delay * HZ / 100;
3421 info->port.closing_wait = new_serial.closing_wait * HZ / 100;
1da177e4
LT		 3422
3423check_and_exit:
77451e53 3424 if (info->port.flags & ASYNC_INITIALIZED) {
02f1175c
JS		 3425 set_line_char(info);
3426 return 0;
3427 } else {
3428 return startup(info);
3429 }
3430} /* set_serial_info */
1da177e4
LT		 3431
3432/*
3433 * get_lsr_info - get line status register info
3434 *
3435 * Purpose: Let user call ioctl() to get info when the UART physically
3436 * is emptied. On bus types like RS485, the transmitter must
3437 * release the bus after transmitting. This must be done when
3438 * the transmit shift register is empty, not be done when the
3439 * transmit holding register is empty. This functionality
3440 * allows an RS485 driver to be written in user space.
3441 */
15ed6cc0 3442static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
1da177e4 3443{
875b206b
JS		 3444 struct cyclades_card *card;
3445 int chip, channel, index;
02f1175c
JS		 3446 unsigned char status;
3447 unsigned int result;
3448 unsigned long flags;
3449 void __iomem *base_addr;
1da177e4 3450
02f1175c 3451 card = info->card;
875b206b 3452 channel = (info->line) - (card->first_line);
2693f485 3453 if (!cy_is_Z(card)) {
02f1175c
JS		 3454 chip = channel >> 2;
3455 channel &= 0x03;
875b206b
JS		 3456 index = card->bus_index;
3457 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 3458
9fa1b3b1 3459 spin_lock_irqsave(&card->card_lock, flags);
db05c3b1 3460 status = readb(base_addr + (CySRER << index)) &
02f1175c 3461 (CyTxRdy | CyTxMpty);
9fa1b3b1 3462 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3463 result = (status ? 0 : TIOCSER_TEMT);
3464 } else {
3465 /* Not supported yet */
3466 return -EINVAL;
3467 }
3468 return put_user(result, (unsigned long __user *)value);
1da177e4
LT		 3469}
3470
02f1175c 3471static int cy_tiocmget(struct tty_struct *tty, struct file *file)
1da177e4 3472{
cab9bdd1 3473 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 3474 struct cyclades_card *card;
3475 int chip, channel, index;
02f1175c
JS		 3476 void __iomem *base_addr;
3477 unsigned long flags;
3478 unsigned char status;
3479 unsigned long lstatus;
3480 unsigned int result;
3481 struct FIRM_ID __iomem *firm_id;
3482 struct ZFW_CTRL __iomem *zfw_ctrl;
3483 struct BOARD_CTRL __iomem *board_ctrl;
3484 struct CH_CTRL __iomem *ch_ctrl;
3485
bf9d8929 3486 if (serial_paranoia_check(info, tty->name, __func__))
02f1175c 3487 return -ENODEV;
1da177e4 3488
7b130c0e
AC		 3489 lock_kernel();
3490
02f1175c 3491 card = info->card;
875b206b 3492 channel = info->line - card->first_line;
2693f485 3493 if (!cy_is_Z(card)) {
02f1175c
JS		 3494 chip = channel >> 2;
3495 channel &= 0x03;
875b206b
JS		 3496 index = card->bus_index;
3497 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4 3498
9fa1b3b1 3499 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3500 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
db05c3b1
JS		 3501 status = readb(base_addr + (CyMSVR1 << index));
3502 status |= readb(base_addr + (CyMSVR2 << index));
9fa1b3b1 3503 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3504
3505 if (info->rtsdtr_inv) {
3506 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3507 ((status & CyDTR) ? TIOCM_RTS : 0);
3508 } else {
3509 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3510 ((status & CyDTR) ? TIOCM_DTR : 0);
3511 }
3512 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3513 ((status & CyRI) ? TIOCM_RNG : 0) |
3514 ((status & CyDSR) ? TIOCM_DSR : 0) |
3515 ((status & CyCTS) ? TIOCM_CTS : 0);
1da177e4 3516 } else {
875b206b
JS		 3517 base_addr = card->base_addr;
3518 firm_id = card->base_addr + ID_ADDRESS;
2693f485 3519 if (cyz_is_loaded(card)) {
875b206b 3520 zfw_ctrl = card->base_addr +
db05c3b1 3521 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3522 board_ctrl = &zfw_ctrl->board_ctrl;
3523 ch_ctrl = zfw_ctrl->ch_ctrl;
db05c3b1 3524 lstatus = readl(&ch_ctrl[channel].rs_status);
02f1175c
JS		 3525 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3526 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3527 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3528 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3529 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3530 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3531 } else {
3532 result = 0;
7b130c0e 3533 unlock_kernel();
02f1175c
JS		 3534 return -ENODEV;
3535 }
1da177e4 3536
02f1175c 3537 }
7b130c0e 3538 unlock_kernel();
02f1175c
JS		 3539 return result;
3540} /* cy_tiomget */
1da177e4
LT		 3541
3542static int
3543cy_tiocmset(struct tty_struct *tty, struct file *file,
02f1175c 3544 unsigned int set, unsigned int clear)
1da177e4 3545{
cab9bdd1 3546 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 3547 struct cyclades_card *card;
3548 int chip, channel, index;
02f1175c
JS		 3549 void __iomem *base_addr;
3550 unsigned long flags;
3551 struct FIRM_ID __iomem *firm_id;
3552 struct ZFW_CTRL __iomem *zfw_ctrl;
3553 struct BOARD_CTRL __iomem *board_ctrl;
3554 struct CH_CTRL __iomem *ch_ctrl;
3555 int retval;
3556
bf9d8929 3557 if (serial_paranoia_check(info, tty->name, __func__))
02f1175c
JS		 3558 return -ENODEV;
3559
3560 card = info->card;
875b206b 3561 channel = (info->line) - (card->first_line);
2693f485 3562 if (!cy_is_Z(card)) {
02f1175c
JS		 3563 chip = channel >> 2;
3564 channel &= 0x03;
875b206b
JS		 3565 index = card->bus_index;
3566 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c
JS		 3567
3568 if (set & TIOCM_RTS) {
9fa1b3b1 3569 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3570 cy_writeb(base_addr + (CyCAR << index),
3571 (u_char) channel);
3572 if (info->rtsdtr_inv) {
3573 cy_writeb(base_addr + (CyMSVR2 << index),
3574 CyDTR);
3575 } else {
3576 cy_writeb(base_addr + (CyMSVR1 << index),
3577 CyRTS);
3578 }
9fa1b3b1 3579 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3580 }
3581 if (clear & TIOCM_RTS) {
9fa1b3b1 3582 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3583 cy_writeb(base_addr + (CyCAR << index),
3584 (u_char) channel);
3585 if (info->rtsdtr_inv) {
3586 cy_writeb(base_addr + (CyMSVR2 << index),
3587 ~CyDTR);
3588 } else {
3589 cy_writeb(base_addr + (CyMSVR1 << index),
3590 ~CyRTS);
3591 }
9fa1b3b1 3592 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3593 }
3594 if (set & TIOCM_DTR) {
9fa1b3b1 3595 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3596 cy_writeb(base_addr + (CyCAR << index),
3597 (u_char) channel);
3598 if (info->rtsdtr_inv) {
3599 cy_writeb(base_addr + (CyMSVR1 << index),
3600 CyRTS);
3601 } else {
3602 cy_writeb(base_addr + (CyMSVR2 << index),
3603 CyDTR);
3604 }
1da177e4 3605#ifdef CY_DEBUG_DTR
21719191
JS		 3606 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3607 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3608 readb(base_addr + (CyMSVR1 << index)),
3609 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3610#endif
9fa1b3b1 3611 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3612 }
3613 if (clear & TIOCM_DTR) {
9fa1b3b1 3614 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3615 cy_writeb(base_addr + (CyCAR << index),
3616 (u_char) channel);
3617 if (info->rtsdtr_inv) {
3618 cy_writeb(base_addr + (CyMSVR1 << index),
3619 ~CyRTS);
3620 } else {
3621 cy_writeb(base_addr + (CyMSVR2 << index),
3622 ~CyDTR);
3623 }
1da177e4
LT		 3624
3625#ifdef CY_DEBUG_DTR
21719191
JS		 3626 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3627 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
db05c3b1
JS		 3628 readb(base_addr + (CyMSVR1 << index)),
3629 readb(base_addr + (CyMSVR2 << index)));
1da177e4 3630#endif
9fa1b3b1 3631 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3632 }
3633 } else {
875b206b 3634 base_addr = card->base_addr;
02f1175c 3635
875b206b 3636 firm_id = card->base_addr + ID_ADDRESS;
2693f485 3637 if (cyz_is_loaded(card)) {
875b206b 3638 zfw_ctrl = card->base_addr +
db05c3b1 3639 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
02f1175c
JS		 3640 board_ctrl = &zfw_ctrl->board_ctrl;
3641 ch_ctrl = zfw_ctrl->ch_ctrl;
3642
3643 if (set & TIOCM_RTS) {
9fa1b3b1 3644 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3645 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3646 readl(&ch_ctrl[channel].rs_control) |
3647 C_RS_RTS);
9fa1b3b1 3648 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3649 }
3650 if (clear & 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 (set & TIOCM_DTR) {
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_DTR);
1da177e4 3662#ifdef CY_DEBUG_DTR
21719191
JS		 3663 printk(KERN_DEBUG "cyc:set_modem_info raising "
3664 "Z DTR\n");
1da177e4 3665#endif
9fa1b3b1 3666 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3667 }
3668 if (clear & TIOCM_DTR) {
9fa1b3b1 3669 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3670 cy_writel(&ch_ctrl[channel].rs_control,
db05c3b1
JS		 3671 readl(&ch_ctrl[channel].rs_control) &
3672 ~C_RS_DTR);
1da177e4 3673#ifdef CY_DEBUG_DTR
21719191
JS		 3674 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3675 "Z DTR\n");
1da177e4 3676#endif
9fa1b3b1 3677 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3678 }
3679 } else {
3680 return -ENODEV;
3681 }
9fa1b3b1
JS		 3682 spin_lock_irqsave(&card->card_lock, flags);
3683 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
02f1175c 3684 if (retval != 0) {
21719191
JS		 3685 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3686 "was %x\n", info->line, retval);
02f1175c 3687 }
9fa1b3b1 3688 spin_unlock_irqrestore(&card->card_lock, flags);
1da177e4 3689 }
02f1175c
JS		 3690 return 0;
3691} /* cy_tiocmset */
1da177e4
LT		 3692
3693/*
3694 * cy_break() --- routine which turns the break handling on or off
3695 */
9e98966c 3696static int cy_break(struct tty_struct *tty, int break_state)
1da177e4 3697{
cab9bdd1 3698 struct cyclades_port *info = tty->driver_data;
9fa1b3b1 3699 struct cyclades_card *card;
02f1175c 3700 unsigned long flags;
9e98966c 3701 int retval = 0;
1da177e4 3702
02f1175c 3703 if (serial_paranoia_check(info, tty->name, "cy_break"))
9e98966c 3704 return -EINVAL;
1da177e4 3705
9fa1b3b1
JS		 3706 card = info->card;
3707
3708 spin_lock_irqsave(&card->card_lock, flags);
2693f485 3709 if (!cy_is_Z(card)) {
02f1175c
JS		 3710 /* Let the transmit ISR take care of this (since it
3711 requires stuffing characters into the output stream).
3712 */
3713 if (break_state == -1) {
3714 if (!info->breakon) {
3715 info->breakon = 1;
3716 if (!info->xmit_cnt) {
9fa1b3b1 3717 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 3718 start_xmit(info);
9fa1b3b1 3719 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3720 }
3721 }
3722 } else {
3723 if (!info->breakoff) {
3724 info->breakoff = 1;
3725 if (!info->xmit_cnt) {
9fa1b3b1 3726 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c 3727 start_xmit(info);
9fa1b3b1 3728 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3729 }
3730 }
1da177e4 3731 }
1da177e4 3732 } else {
02f1175c 3733 if (break_state == -1) {
9fa1b3b1
JS		 3734 retval = cyz_issue_cmd(card,
3735 info->line - card->first_line,
02f1175c
JS		 3736 C_CM_SET_BREAK, 0L);
3737 if (retval != 0) {
21719191
JS		 3738 printk(KERN_ERR "cyc:cy_break (set) retval on "
3739 "ttyC%d was %x\n", info->line, retval);
02f1175c
JS		 3740 }
3741 } else {
9fa1b3b1
JS		 3742 retval = cyz_issue_cmd(card,
3743 info->line - card->first_line,
02f1175c
JS		 3744 C_CM_CLR_BREAK, 0L);
3745 if (retval != 0) {
21719191
JS		 3746 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3747 "on ttyC%d was %x\n", info->line,
3748 retval);
02f1175c 3749 }
1da177e4 3750 }
1da177e4 3751 }
9fa1b3b1 3752 spin_unlock_irqrestore(&card->card_lock, flags);
9e98966c 3753 return retval;
02f1175c 3754} /* cy_break */
1da177e4 3755
15ed6cc0
AC		 3756static int get_mon_info(struct cyclades_port *info,
3757 struct cyclades_monitor __user *mon)
1da177e4
LT		 3758{
3759
02f1175c
JS		 3760 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3761 return -EFAULT;
3762 info->mon.int_count = 0;
3763 info->mon.char_count = 0;
3764 info->mon.char_max = 0;
3765 info->mon.char_last = 0;
3766 return 0;
3767} /* get_mon_info */
1da177e4 3768
02f1175c 3769static int set_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 3770{
875b206b 3771 struct cyclades_card *card;
02f1175c 3772 void __iomem *base_addr;
875b206b 3773 int channel, chip, index;
02f1175c 3774 unsigned long flags;
1da177e4 3775
02f1175c 3776 card = info->card;
875b206b 3777 channel = info->line - card->first_line;
2693f485 3778 if (!cy_is_Z(card)) {
02f1175c
JS		 3779 chip = channel >> 2;
3780 channel &= 0x03;
875b206b 3781 index = card->bus_index;
02f1175c 3782 base_addr =
875b206b 3783 card->base_addr + (cy_chip_offset[chip] << index);
02f1175c
JS		 3784
3785 info->cor3 &= ~CyREC_FIFO;
3786 info->cor3 |= value & CyREC_FIFO;
1da177e4 3787
9fa1b3b1 3788 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 3789 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3790 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
9fa1b3b1 3791 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3792 }
3793 return 0;
3794} /* set_threshold */
1da177e4 3795
15ed6cc0
AC		 3796static int get_threshold(struct cyclades_port *info,
3797 unsigned long __user *value)
1da177e4 3798{
875b206b 3799 struct cyclades_card *card;
02f1175c 3800 void __iomem *base_addr;
875b206b 3801 int channel, chip, index;
02f1175c 3802 unsigned long tmp;
1da177e4 3803
02f1175c 3804 card = info->card;
875b206b 3805 channel = info->line - card->first_line;
2693f485 3806 if (!cy_is_Z(card)) {
02f1175c
JS		 3807 chip = channel >> 2;
3808 channel &= 0x03;
875b206b
JS		 3809 index = card->bus_index;
3810 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 3811
db05c3b1 3812 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
02f1175c 3813 return put_user(tmp, value);
02f1175c 3814 }
f7429034 3815 return 0;
02f1175c 3816} /* get_threshold */
1da177e4 3817
15ed6cc0
AC		 3818static int set_default_threshold(struct cyclades_port *info,
3819 unsigned long value)
1da177e4 3820{
02f1175c
JS		 3821 info->default_threshold = value & 0x0f;
3822 return 0;
3823} /* set_default_threshold */
1da177e4 3824
15ed6cc0
AC		 3825static int get_default_threshold(struct cyclades_port *info,
3826 unsigned long __user *value)
1da177e4 3827{
02f1175c
JS		 3828 return put_user(info->default_threshold, value);
3829} /* get_default_threshold */
1da177e4 3830
02f1175c 3831static int set_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3832{
875b206b 3833 struct cyclades_card *card;
02f1175c 3834 void __iomem *base_addr;
875b206b 3835 int channel, chip, index;
02f1175c 3836 unsigned long flags;
1da177e4 3837
02f1175c 3838 card = info->card;
875b206b 3839 channel = info->line - card->first_line;
2693f485 3840 if (!cy_is_Z(card)) {
02f1175c
JS		 3841 chip = channel >> 2;
3842 channel &= 0x03;
875b206b
JS		 3843 index = card->bus_index;
3844 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1da177e4 3845
9fa1b3b1 3846 spin_lock_irqsave(&card->card_lock, flags);
02f1175c 3847 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
9fa1b3b1 3848 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 3849 }
3850 return 0;
3851} /* set_timeout */
1da177e4 3852
15ed6cc0
AC		 3853static int get_timeout(struct cyclades_port *info,
3854 unsigned long __user *value)
1da177e4 3855{
875b206b 3856 struct cyclades_card *card;
02f1175c 3857 void __iomem *base_addr;
875b206b 3858 int channel, chip, index;
02f1175c 3859 unsigned long tmp;
1da177e4 3860
02f1175c 3861 card = info->card;
875b206b 3862 channel = info->line - card->first_line;
2693f485 3863 if (!cy_is_Z(card)) {
02f1175c
JS		 3864 chip = channel >> 2;
3865 channel &= 0x03;
875b206b
JS		 3866 index = card->bus_index;
3867 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
02f1175c 3868
db05c3b1 3869 tmp = readb(base_addr + (CyRTPR << index));
02f1175c 3870 return put_user(tmp, value);
02f1175c 3871 }
f7429034 3872 return 0;
02f1175c 3873} /* get_timeout */
1da177e4 3874
02f1175c 3875static int set_default_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3876{
02f1175c
JS		 3877 info->default_timeout = value & 0xff;
3878 return 0;
3879} /* set_default_timeout */
1da177e4 3880
15ed6cc0
AC		 3881static int get_default_timeout(struct cyclades_port *info,
3882 unsigned long __user *value)
1da177e4 3883{
02f1175c
JS		 3884 return put_user(info->default_timeout, value);
3885} /* get_default_timeout */
1da177e4
LT		 3886
3887/*
3888 * This routine allows the tty driver to implement device-
3889 * specific ioctl's. If the ioctl number passed in cmd is
3890 * not recognized by the driver, it should return ENOIOCTLCMD.
3891 */
3892static int
02f1175c
JS		 3893cy_ioctl(struct tty_struct *tty, struct file *file,
3894 unsigned int cmd, unsigned long arg)
1da177e4 3895{
cab9bdd1 3896 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 3897 struct cyclades_icount cprev, cnow; /* kernel counter temps */
3898 struct serial_icounter_struct __user *p_cuser; /* user space */
3899 int ret_val = 0;
3900 unsigned long flags;
3901 void __user *argp = (void __user *)arg;
3902
3903 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3904 return -ENODEV;
1da177e4
LT		 3905
3906#ifdef CY_DEBUG_OTHER
21719191
JS		 3907 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3908 info->line, cmd, arg);
1da177e4 3909#endif
7b130c0e 3910 lock_kernel();
1da177e4 3911
02f1175c
JS		 3912 switch (cmd) {
3913 case CYGETMON:
3914 ret_val = get_mon_info(info, argp);
3915 break;
3916 case CYGETTHRESH:
3917 ret_val = get_threshold(info, argp);
3918 break;
3919 case CYSETTHRESH:
3920 ret_val = set_threshold(info, arg);
3921 break;
3922 case CYGETDEFTHRESH:
3923 ret_val = get_default_threshold(info, argp);
3924 break;
3925 case CYSETDEFTHRESH:
3926 ret_val = set_default_threshold(info, arg);
3927 break;
3928 case CYGETTIMEOUT:
3929 ret_val = get_timeout(info, argp);
3930 break;
3931 case CYSETTIMEOUT:
3932 ret_val = set_timeout(info, arg);
3933 break;
3934 case CYGETDEFTIMEOUT:
3935 ret_val = get_default_timeout(info, argp);
3936 break;
3937 case CYSETDEFTIMEOUT:
3938 ret_val = set_default_timeout(info, arg);
3939 break;
1da177e4 3940 case CYSETRFLOW:
02f1175c
JS		 3941 info->rflow = (int)arg;
3942 ret_val = 0;
3943 break;
1da177e4 3944 case CYGETRFLOW:
02f1175c
JS		 3945 ret_val = info->rflow;
3946 break;
1da177e4 3947 case CYSETRTSDTR_INV:
02f1175c
JS		 3948 info->rtsdtr_inv = (int)arg;
3949 ret_val = 0;
3950 break;
1da177e4 3951 case CYGETRTSDTR_INV:
02f1175c
JS		 3952 ret_val = info->rtsdtr_inv;
3953 break;
1da177e4 3954 case CYGETCD1400VER:
02f1175c
JS		 3955 ret_val = info->chip_rev;
3956 break;
1da177e4
LT		 3957#ifndef CONFIG_CYZ_INTR
3958 case CYZSETPOLLCYCLE:
02f1175c
JS		 3959 cyz_polling_cycle = (arg * HZ) / 1000;
3960 ret_val = 0;
3961 break;
1da177e4 3962 case CYZGETPOLLCYCLE:
02f1175c
JS		 3963 ret_val = (cyz_polling_cycle * 1000) / HZ;
3964 break;
3965#endif /* CONFIG_CYZ_INTR */
1da177e4 3966 case CYSETWAIT:
44b7d1b3 3967 info->port.closing_wait = (unsigned short)arg * HZ / 100;
02f1175c
JS		 3968 ret_val = 0;
3969 break;
1da177e4 3970 case CYGETWAIT:
44b7d1b3 3971 ret_val = info->port.closing_wait / (HZ / 100);
02f1175c
JS		 3972 break;
3973 case TIOCGSERIAL:
3974 ret_val = get_serial_info(info, argp);
3975 break;
3976 case TIOCSSERIAL:
3977 ret_val = set_serial_info(info, argp);
3978 break;
3979 case TIOCSERGETLSR: /* Get line status register */
3980 ret_val = get_lsr_info(info, argp);
3981 break;
3982 /*
3983 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
3984 * - mask passed in arg for lines of interest
3985 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
3986 * Caller should use TIOCGICOUNT to see which one it was
3987 */
1da177e4 3988 case TIOCMIWAIT:
9fa1b3b1 3989 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 3990 /* note the counters on entry */
2c7fea99 3991 cnow = info->icount;
9fa1b3b1 3992 spin_unlock_irqrestore(&info->card->card_lock, flags);
2c7fea99
JS		 3993 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
3994 cprev = cnow;
9fa1b3b1 3995 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 3996 cnow = info->icount; /* atomic copy */
9fa1b3b1 3997 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c 3998
2c7fea99
JS		 3999 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4000 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4001 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4002 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
4003 }));
4004 break;
1da177e4 4005
02f1175c
JS		 4006 /*
4007 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4008 * Return: write counters to the user passed counter struct
4009 * NB: both 1->0 and 0->1 transitions are counted except for
4010 * RI where only 0->1 is counted.
4011 */
1da177e4 4012 case TIOCGICOUNT:
9fa1b3b1 4013 spin_lock_irqsave(&info->card->card_lock, flags);
02f1175c 4014 cnow = info->icount;
9fa1b3b1 4015 spin_unlock_irqrestore(&info->card->card_lock, flags);
02f1175c
JS		 4016 p_cuser = argp;
4017 ret_val = put_user(cnow.cts, &p_cuser->cts);
4018 if (ret_val)
7b130c0e 4019 break;
02f1175c
JS		 4020 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4021 if (ret_val)
7b130c0e 4022 break;
02f1175c
JS		 4023 ret_val = put_user(cnow.rng, &p_cuser->rng);
4024 if (ret_val)
7b130c0e 4025 break;
02f1175c
JS		 4026 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4027 if (ret_val)
7b130c0e 4028 break;
02f1175c
JS		 4029 ret_val = put_user(cnow.rx, &p_cuser->rx);
4030 if (ret_val)
7b130c0e 4031 break;
02f1175c
JS		 4032 ret_val = put_user(cnow.tx, &p_cuser->tx);
4033 if (ret_val)
7b130c0e 4034 break;
02f1175c
JS		 4035 ret_val = put_user(cnow.frame, &p_cuser->frame);
4036 if (ret_val)
7b130c0e 4037 break;
02f1175c
JS		 4038 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4039 if (ret_val)
7b130c0e 4040 break;
02f1175c
JS		 4041 ret_val = put_user(cnow.parity, &p_cuser->parity);
4042 if (ret_val)
7b130c0e 4043 break;
02f1175c
JS		 4044 ret_val = put_user(cnow.brk, &p_cuser->brk);
4045 if (ret_val)
7b130c0e 4046 break;
02f1175c
JS		 4047 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4048 if (ret_val)
7b130c0e 4049 break;
02f1175c
JS		 4050 ret_val = 0;
4051 break;
4052 default:
4053 ret_val = -ENOIOCTLCMD;
4054 }
7b130c0e 4055 unlock_kernel();
1da177e4
LT		 4056
4057#ifdef CY_DEBUG_OTHER
21719191 4058 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
1da177e4 4059#endif
02f1175c
JS		 4060 return ret_val;
4061} /* cy_ioctl */
1da177e4
LT		 4062
4063/*
4064 * This routine allows the tty driver to be notified when
4065 * device's termios settings have changed. Note that a
4066 * well-designed tty driver should be prepared to accept the case
4067 * where old == NULL, and try to do something rational.
4068 */
02f1175c 4069static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 4070{
cab9bdd1 4071 struct cyclades_port *info = tty->driver_data;
1da177e4
LT		 4072
4073#ifdef CY_DEBUG_OTHER
21719191 4074 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
1da177e4
LT		 4075#endif
4076
02f1175c
JS		 4077 set_line_char(info);
4078
4079 if ((old_termios->c_cflag & CRTSCTS) &&
4080 !(tty->termios->c_cflag & CRTSCTS)) {
4081 tty->hw_stopped = 0;
4082 cy_start(tty);
4083 }
1da177e4 4084#if 0
02f1175c
JS		 4085 /*
4086 * No need to wake up processes in open wait, since they
4087 * sample the CLOCAL flag once, and don't recheck it.
4088 * XXX It's not clear whether the current behavior is correct
4089 * or not. Hence, this may change.....
4090 */
4091 if (!(old_termios->c_cflag & CLOCAL) &&
4092 (tty->termios->c_cflag & CLOCAL))
77451e53 4093 wake_up_interruptible(&info->port.open_wait);
1da177e4 4094#endif
02f1175c 4095} /* cy_set_termios */
1da177e4
LT		 4096
4097/* This function is used to send a high-priority XON/XOFF character to
4098 the device.
4099*/
02f1175c 4100static void cy_send_xchar(struct tty_struct *tty, char ch)
1da177e4 4101{
cab9bdd1 4102 struct cyclades_port *info = tty->driver_data;
875b206b
JS		 4103 struct cyclades_card *card;
4104 int channel;
1da177e4 4105
02f1175c 4106 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
1da177e4
LT		 4107 return;
4108
02f1175c 4109 info->x_char = ch;
1da177e4
LT		 4110
4111 if (ch)
02f1175c 4112 cy_start(tty);
1da177e4
LT		 4113
4114 card = info->card;
875b206b 4115 channel = info->line - card->first_line;
1da177e4 4116
2693f485 4117 if (cy_is_Z(card)) {
02f1175c 4118 if (ch == STOP_CHAR(tty))
875b206b 4119 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
02f1175c 4120 else if (ch == START_CHAR(tty))
875b206b 4121 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
1da177e4
LT		 4122 }
4123}
4124
4125/* This routine is called by the upper-layer tty layer to signal
4126 that incoming characters should be throttled because the input
4127 buffers are close to full.
4128 */
02f1175c 4129static void cy_throttle(struct tty_struct *tty)
1da177e4 4130{
cab9bdd1 4131 struct cyclades_port *info = tty->driver_data;
875b206b 4132 struct cyclades_card *card;
02f1175c
JS		 4133 unsigned long flags;
4134 void __iomem *base_addr;
875b206b 4135 int chip, channel, index;
1da177e4
LT		 4136
4137#ifdef CY_DEBUG_THROTTLE
02f1175c 4138 char buf[64];
1da177e4 4139
21719191 4140 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
02f1175c 4141 tty->ldisc.chars_in_buffer(tty), info->line);
1da177e4
LT		 4142#endif
4143
15ed6cc0 4144 if (serial_paranoia_check(info, tty->name, "cy_throttle"))
02f1175c 4145 return;
02f1175c
JS		 4146
4147 card = info->card;
4148
4149 if (I_IXOFF(tty)) {
2693f485 4150 if (!cy_is_Z(card))
02f1175c
JS		 4151 cy_send_xchar(tty, STOP_CHAR(tty));
4152 else
4153 info->throttle = 1;
4154 }
1da177e4 4155
02f1175c 4156 if (tty->termios->c_cflag & CRTSCTS) {
875b206b 4157 channel = info->line - card->first_line;
2693f485 4158 if (!cy_is_Z(card)) {
02f1175c
JS		 4159 chip = channel >> 2;
4160 channel &= 0x03;
875b206b
JS		 4161 index = card->bus_index;
4162 base_addr = card->base_addr +
02f1175c
JS		 4163 (cy_chip_offset[chip] << index);
4164
9fa1b3b1 4165 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 4166 cy_writeb(base_addr + (CyCAR << index),
4167 (u_char) channel);
4168 if (info->rtsdtr_inv) {
4169 cy_writeb(base_addr + (CyMSVR2 << index),
4170 ~CyDTR);
4171 } else {
4172 cy_writeb(base_addr + (CyMSVR1 << index),
4173 ~CyRTS);
4174 }
9fa1b3b1 4175 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 4176 } else {
4177 info->throttle = 1;
4178 }
4179 }
02f1175c 4180} /* cy_throttle */
1da177e4
LT		 4181
4182/*
4183 * This routine notifies the tty driver that it should signal
4184 * that characters can now be sent to the tty without fear of
4185 * overrunning the input buffers of the line disciplines.
4186 */
02f1175c 4187static void cy_unthrottle(struct tty_struct *tty)
1da177e4 4188{
cab9bdd1 4189 struct cyclades_port *info = tty->driver_data;
875b206b 4190 struct cyclades_card *card;
02f1175c
JS		 4191 unsigned long flags;
4192 void __iomem *base_addr;
875b206b 4193 int chip, channel, index;
1da177e4
LT		 4194
4195#ifdef CY_DEBUG_THROTTLE
02f1175c
JS		 4196 char buf[64];
4197
21719191 4198 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
15ed6cc0 4199 tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
1da177e4
LT		 4200#endif
4201
15ed6cc0 4202 if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
02f1175c 4203 return;
1da177e4 4204
02f1175c
JS		 4205 if (I_IXOFF(tty)) {
4206 if (info->x_char)
4207 info->x_char = 0;
4208 else
4209 cy_send_xchar(tty, START_CHAR(tty));
1da177e4 4210 }
1da177e4 4211
02f1175c
JS		 4212 if (tty->termios->c_cflag & CRTSCTS) {
4213 card = info->card;
875b206b 4214 channel = info->line - card->first_line;
2693f485 4215 if (!cy_is_Z(card)) {
02f1175c
JS		 4216 chip = channel >> 2;
4217 channel &= 0x03;
875b206b
JS		 4218 index = card->bus_index;
4219 base_addr = card->base_addr +
02f1175c
JS		 4220 (cy_chip_offset[chip] << index);
4221
9fa1b3b1 4222 spin_lock_irqsave(&card->card_lock, flags);
02f1175c
JS		 4223 cy_writeb(base_addr + (CyCAR << index),
4224 (u_char) channel);
4225 if (info->rtsdtr_inv) {
4226 cy_writeb(base_addr + (CyMSVR2 << index),
4227 CyDTR);
4228 } else {
4229 cy_writeb(base_addr + (CyMSVR1 << index),
4230 CyRTS);
4231 }
9fa1b3b1 4232 spin_unlock_irqrestore(&card->card_lock, flags);
02f1175c
JS		 4233 } else {
4234 info->throttle = 0;
4235 }
4236 }
02f1175c 4237} /* cy_unthrottle */
1da177e4
LT		 4238
4239/* cy_start and cy_stop provide software output flow control as a
4240 function of XON/XOFF, software CTS, and other such stuff.
4241*/
02f1175c 4242static void cy_stop(struct tty_struct *tty)
1da177e4 4243{
02f1175c 4244 struct cyclades_card *cinfo;
cab9bdd1 4245 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4246 void __iomem *base_addr;
4247 int chip, channel, index;
4248 unsigned long flags;
1da177e4
LT		 4249
4250#ifdef CY_DEBUG_OTHER
21719191 4251 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
1da177e4
LT		 4252#endif
4253
02f1175c
JS		 4254 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4255 return;
1da177e4 4256
875b206b 4257 cinfo = info->card;
02f1175c 4258 channel = info->line - cinfo->first_line;
2693f485 4259 if (!cy_is_Z(cinfo)) {
02f1175c
JS		 4260 index = cinfo->bus_index;
4261 chip = channel >> 2;
4262 channel &= 0x03;
9fa1b3b1 4263 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
1da177e4 4264
9fa1b3b1 4265 spin_lock_irqsave(&cinfo->card_lock, flags);
02f1175c
JS		 4266 cy_writeb(base_addr + (CyCAR << index),
4267 (u_char)(channel & 0x0003)); /* index channel */
4268 cy_writeb(base_addr + (CySRER << index),
db05c3b1 4269 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
9fa1b3b1 4270 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c 4271 }
02f1175c 4272} /* cy_stop */
1da177e4 4273
02f1175c 4274static void cy_start(struct tty_struct *tty)
1da177e4 4275{
02f1175c 4276 struct cyclades_card *cinfo;
cab9bdd1 4277 struct cyclades_port *info = tty->driver_data;
02f1175c
JS		 4278 void __iomem *base_addr;
4279 int chip, channel, index;
4280 unsigned long flags;
1da177e4
LT		 4281
4282#ifdef CY_DEBUG_OTHER
21719191 4283 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
1da177e4
LT		 4284#endif
4285
02f1175c
JS		 4286 if (serial_paranoia_check(info, tty->name, "cy_start"))
4287 return;
1da177e4 4288
875b206b 4289 cinfo = info->card;
02f1175c
JS		 4290 channel = info->line - cinfo->first_line;
4291 index = cinfo->bus_index;
2693f485 4292 if (!cy_is_Z(cinfo)) {
02f1175c
JS		 4293 chip = channel >> 2;
4294 channel &= 0x03;
9fa1b3b1 4295 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
1da177e4 4296
9fa1b3b1 4297 spin_lock_irqsave(&cinfo->card_lock, flags);
15ed6cc0
AC		 4298 cy_writeb(base_addr + (CyCAR << index),
4299 (u_char) (channel & 0x0003)); /* index channel */
02f1175c 4300 cy_writeb(base_addr + (CySRER << index),
db05c3b1 4301 readb(base_addr + (CySRER << index)) | CyTxRdy);
9fa1b3b1 4302 spin_unlock_irqrestore(&cinfo->card_lock, flags);
02f1175c 4303 }
02f1175c 4304} /* cy_start */
1da177e4 4305
1da177e4
LT		 4306/*
4307 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4308 */
02f1175c 4309static void cy_hangup(struct tty_struct *tty)
1da177e4 4310{
cab9bdd1 4311 struct cyclades_port *info = tty->driver_data;
02f1175c 4312
1da177e4 4313#ifdef CY_DEBUG_OTHER
21719191 4314 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
1da177e4
LT		 4315#endif
4316
02f1175c
JS		 4317 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4318 return;
1da177e4 4319
02f1175c
JS		 4320 cy_flush_buffer(tty);
4321 shutdown(info);
77451e53 4322 info->port.count = 0;
1da177e4 4323#ifdef CY_DEBUG_COUNT
21719191
JS		 4324 printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4325 current->pid);
1da177e4 4326#endif
77451e53
AC		 4327 info->port.tty = NULL;
4328 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
4329 wake_up_interruptible(&info->port.open_wait);
02f1175c 4330} /* cy_hangup */
1da177e4
LT		 4331
4332/*
4333 * ---------------------------------------------------------------------
4334 * cy_init() and friends
4335 *
4336 * cy_init() is called at boot-time to initialize the serial driver.
4337 * ---------------------------------------------------------------------
4338 */
4339
dd025c0c 4340static int __devinit cy_init_card(struct cyclades_card *cinfo)
0809e267
JS		 4341{
4342 struct cyclades_port *info;
65f76a82 4343 unsigned int nports, port;
0809e267 4344 unsigned short chip_number;
65f76a82 4345 int uninitialized_var(index);
0809e267 4346
3046d50e
JS		 4347 spin_lock_init(&cinfo->card_lock);
4348
2693f485 4349 if (cy_is_Z(cinfo)) { /* Cyclades-Z */
101b8159 4350 nports = (cinfo->hw_ver == ZE_V1) ? ZE_V1_NPORTS : 8;
0809e267
JS		 4351 cinfo->intr_enabled = 0;
4352 cinfo->nports = 0; /* Will be correctly set later, after
4353 Z FW is loaded */
3046d50e
JS		 4354 } else {
4355 index = cinfo->bus_index;
4356 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4357 }
4358
dd025c0c
JS		 4359 cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
4360 if (cinfo->ports == NULL) {
4361 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
3137553d 4362 cinfo->nports = 0;
dd025c0c
JS		 4363 return -ENOMEM;
4364 }
4365
3046d50e
JS		 4366 for (port = cinfo->first_line; port < cinfo->first_line + nports;
4367 port++) {
dd025c0c 4368 info = &cinfo->ports[port - cinfo->first_line];
44b7d1b3 4369 tty_port_init(&info->port);
3046d50e 4370 info->magic = CYCLADES_MAGIC;
875b206b 4371 info->card = cinfo;
3046d50e 4372 info->line = port;
3046d50e 4373
44b7d1b3
AC		 4374 info->port.closing_wait = CLOSING_WAIT_DELAY;
4375 info->port.close_delay = 5 * HZ / 10;
77451e53 4376 info->port.flags = STD_COM_FLAGS;
2c7fea99 4377 init_completion(&info->shutdown_wait);
3046d50e
JS		 4378 init_waitqueue_head(&info->delta_msr_wait);
4379
2693f485 4380 if (cy_is_Z(cinfo)) {
0809e267 4381 info->type = PORT_STARTECH;
101b8159 4382 if (cinfo->hw_ver == ZO_V1)
0809e267
JS		 4383 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4384 else
3046d50e 4385 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
0809e267 4386#ifdef CONFIG_CYZ_INTR
3991428d
JS		 4387 setup_timer(&cyz_rx_full_timer[port],
4388 cyz_rx_restart, (unsigned long)info);
0809e267 4389#endif
3046d50e 4390 } else {
0809e267 4391 info->type = PORT_CIRRUS;
0809e267 4392 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
3046d50e 4393 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
0809e267
JS		 4394 info->cor2 = CyETC;
4395 info->cor3 = 0x08; /* _very_ small rcv threshold */
3046d50e 4396
0809e267 4397 chip_number = (port - cinfo->first_line) / 4;
15ed6cc0
AC		 4398 info->chip_rev = readb(cinfo->base_addr +
4399 (cy_chip_offset[chip_number] << index) +
4400 (CyGFRCR << index));
4401
4402 if (info->chip_rev >= CD1400_REV_J) {
0809e267
JS		 4403 /* It is a CD1400 rev. J or later */
4404 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
4405 info->tco = baud_co_60[13]; /* Tx CO */
4406 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
4407 info->rco = baud_co_60[13]; /* Rx CO */
0809e267
JS		 4408 info->rtsdtr_inv = 1;
4409 } else {
4410 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
4411 info->tco = baud_co_25[13]; /* Tx CO */
4412 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
4413 info->rco = baud_co_25[13]; /* Rx CO */
0809e267
JS		 4414 info->rtsdtr_inv = 0;
4415 }
3046d50e
JS		 4416 info->read_status_mask = CyTIMEOUT | CySPECHAR |
4417 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
0809e267 4418 }
3046d50e 4419
0809e267 4420 }
3046d50e
JS		 4421
4422#ifndef CONFIG_CYZ_INTR
2693f485 4423 if (cy_is_Z(cinfo) && !timer_pending(&cyz_timerlist)) {
3046d50e
JS		 4424 mod_timer(&cyz_timerlist, jiffies + 1);
4425#ifdef CY_PCI_DEBUG
4426 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4427#endif
4428 }
4429#endif
dd025c0c 4430 return 0;
0809e267
JS		 4431}
4432
1da177e4
LT		 4433/* initialize chips on Cyclom-Y card -- return number of valid
4434 chips (which is number of ports/4) */
31b4f0a1
JS		 4435static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4436 int index)
1da177e4 4437{
02f1175c
JS		 4438 unsigned int chip_number;
4439 void __iomem *base_addr;
4440
4441 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4442 /* Cy_HwReset is 0x1400 */
4443 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4444 /* Cy_ClrIntr is 0x1800 */
4445 udelay(500L);
4446
15ed6cc0
AC		 4447 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
4448 chip_number++) {
02f1175c
JS		 4449 base_addr =
4450 true_base_addr + (cy_chip_offset[chip_number] << index);
4451 mdelay(1);
db05c3b1 4452 if (readb(base_addr + (CyCCR << index)) != 0x00) {
02f1175c
JS		 4453 /*************
4454 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4455 chip_number, (unsigned long)base_addr);
4456 *************/
4457 return chip_number;
4458 }
4459
4460 cy_writeb(base_addr + (CyGFRCR << index), 0);
4461 udelay(10L);
4462
4463 /* The Cyclom-16Y does not decode address bit 9 and therefore
4464 cannot distinguish between references to chip 0 and a non-
4465 existent chip 4. If the preceding clearing of the supposed
4466 chip 4 GFRCR register appears at chip 0, there is no chip 4
4467 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4468 */
db05c3b1 4469 if (chip_number == 4 && readb(true_base_addr +
02f1175c
JS		 4470 (cy_chip_offset[0] << index) +
4471 (CyGFRCR << index)) == 0) {
4472 return chip_number;
4473 }
4474
4475 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4476 mdelay(1);
4477
db05c3b1 4478 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
02f1175c
JS		 4479 /*
4480 printk(" chip #%d at %#6lx is not responding ",
4481 chip_number, (unsigned long)base_addr);
4482 printk("(GFRCR stayed 0)\n",
4483 */
4484 return chip_number;
4485 }
db05c3b1 4486 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
02f1175c
JS		 4487 0x40) {
4488 /*
4489 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4490 "%#2x)\n",
4491 chip_number, (unsigned long)base_addr,
4492 base_addr[CyGFRCR<<index]);
4493 */
4494 return chip_number;
4495 }
4496 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
db05c3b1 4497 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
02f1175c
JS		 4498 /* It is a CD1400 rev. J or later */
4499 /* Impossible to reach 5ms with this chip.
4500 Changed to 2ms instead (f = 500 Hz). */
4501 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4502 } else {
4503 /* f = 200 Hz */
4504 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4505 }
1da177e4 4506
02f1175c
JS		 4507 /*
4508 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4509 chip_number, (unsigned long)base_addr,
db05c3b1 4510 readb(base_addr+(CyGFRCR<<index)));
02f1175c
JS		 4511 */
4512 }
4513 return chip_number;
4514} /* cyy_init_card */
1da177e4
LT		 4515
4516/*
4517 * ---------------------------------------------------------------------
4518 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4519 * sets global variables and return the number of ISA boards found.
4520 * ---------------------------------------------------------------------
4521 */
02f1175c 4522static int __init cy_detect_isa(void)
1da177e4
LT		 4523{
4524#ifdef CONFIG_ISA
02f1175c
JS		 4525 unsigned short cy_isa_irq, nboard;
4526 void __iomem *cy_isa_address;
4527 unsigned short i, j, cy_isa_nchan;
1da177e4 4528#ifdef MODULE
02f1175c 4529 int isparam = 0;
1da177e4
LT		 4530#endif
4531
02f1175c 4532 nboard = 0;
1da177e4
LT		 4533
4534#ifdef MODULE
4535 /* Check for module parameters */
02f1175c
JS		 4536 for (i = 0; i < NR_CARDS; i++) {
4537 if (maddr[i] || i) {
4538 isparam = 1;
4539 cy_isa_addresses[i] = maddr[i];
4540 }
4541 if (!maddr[i])
4542 break;
1da177e4
LT		 4543 }
4544#endif
4545
02f1175c
JS		 4546 /* scan the address table probing for Cyclom-Y/ISA boards */
4547 for (i = 0; i < NR_ISA_ADDRS; i++) {
4548 unsigned int isa_address = cy_isa_addresses[i];
15ed6cc0 4549 if (isa_address == 0x0000)
096dcfce 4550 return nboard;
1da177e4 4551
02f1175c 4552 /* probe for CD1400... */
cd989b3a 4553 cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
3137553d
JS		 4554 if (cy_isa_address == NULL) {
4555 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4556 "address\n");
4557 continue;
4558 }
02f1175c
JS		 4559 cy_isa_nchan = CyPORTS_PER_CHIP *
4560 cyy_init_card(cy_isa_address, 0);
4561 if (cy_isa_nchan == 0) {
3137553d 4562 iounmap(cy_isa_address);
02f1175c
JS		 4563 continue;
4564 }
1da177e4
LT		 4565#ifdef MODULE
4566 if (isparam && irq[i])
02f1175c 4567 cy_isa_irq = irq[i];
1da177e4
LT		 4568 else
4569#endif
02f1175c
JS		 4570 /* find out the board's irq by probing */
4571 cy_isa_irq = detect_isa_irq(cy_isa_address);
4572 if (cy_isa_irq == 0) {
21719191
JS		 4573 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4574 "IRQ could not be detected.\n",
02f1175c 4575 (unsigned long)cy_isa_address);
3137553d 4576 iounmap(cy_isa_address);
02f1175c
JS		 4577 continue;
4578 }
4579
4580 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
21719191
JS		 4581 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4582 "more channels are available. Change NR_PORTS "
4583 "in cyclades.c and recompile kernel.\n",
02f1175c 4584 (unsigned long)cy_isa_address);
3137553d 4585 iounmap(cy_isa_address);
096dcfce 4586 return nboard;
02f1175c
JS		 4587 }
4588 /* fill the next cy_card structure available */
4589 for (j = 0; j < NR_CARDS; j++) {
f7429034 4590 if (cy_card[j].base_addr == NULL)
02f1175c
JS		 4591 break;
4592 }
4593 if (j == NR_CARDS) { /* no more cy_cards available */
21719191
JS		 4594 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4595 "more cards can be used. Change NR_CARDS in "
4596 "cyclades.c and recompile kernel.\n",
02f1175c 4597 (unsigned long)cy_isa_address);
3137553d 4598 iounmap(cy_isa_address);
096dcfce 4599 return nboard;
02f1175c
JS		 4600 }
4601
4602 /* allocate IRQ */
4603 if (request_irq(cy_isa_irq, cyy_interrupt,
4604 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
21719191
JS		 4605 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4606 "could not allocate IRQ#%d.\n",
4607 (unsigned long)cy_isa_address, cy_isa_irq);
3137553d 4608 iounmap(cy_isa_address);
096dcfce 4609 return nboard;
02f1175c
JS		 4610 }
4611
4612 /* set cy_card */
4613 cy_card[j].base_addr = cy_isa_address;
97e87f8e 4614 cy_card[j].ctl_addr.p9050 = NULL;
02f1175c
JS		 4615 cy_card[j].irq = (int)cy_isa_irq;
4616 cy_card[j].bus_index = 0;
4617 cy_card[j].first_line = cy_next_channel;
4618 cy_card[j].num_chips = cy_isa_nchan / 4;
3137553d
JS		 4619 if (cy_init_card(&cy_card[j])) {
4620 cy_card[j].base_addr = NULL;
4621 free_irq(cy_isa_irq, &cy_card[j]);
4622 iounmap(cy_isa_address);
4623 continue;
4624 }
02f1175c
JS		 4625 nboard++;
4626
21719191
JS		 4627 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4628 "%d channels starting from port %d\n",
02f1175c
JS		 4629 j + 1, (unsigned long)cy_isa_address,
4630 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
21719191
JS		 4631 cy_isa_irq, cy_isa_nchan, cy_next_channel);
4632
6ad1ccc1
JS		 4633 for (j = cy_next_channel;
4634 j < cy_next_channel + cy_isa_nchan; j++)
4635 tty_register_device(cy_serial_driver, j, NULL);
02f1175c
JS		 4636 cy_next_channel += cy_isa_nchan;
4637 }
096dcfce 4638 return nboard;
1da177e4 4639#else
096dcfce 4640 return 0;
02f1175c
JS		 4641#endif /* CONFIG_ISA */
4642} /* cy_detect_isa */
1da177e4 4643
58936d8d 4644#ifdef CONFIG_PCI
054f5b0a
JS		 4645static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4646{
4647 unsigned int a;
4648
4649 for (a = 0; a < size && *str; a++, str++)
4650 if (*str & 0x80)
4651 return -EINVAL;
4652
4653 for (; a < size; a++, str++)
4654 if (*str)
4655 return -EINVAL;
4656
4657 return 0;
4658}
4659
f61e761e 4660static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
054f5b0a
JS		 4661 unsigned int size)
4662{
4663 for (; size > 0; size--) {
4664 cy_writel(fpga, *data++);
4665 udelay(10);
4666 }
4667}
4668
4669static void __devinit plx_init(struct pci_dev *pdev, int irq,
4670 struct RUNTIME_9060 __iomem *addr)
1da177e4 4671{
02f1175c 4672 /* Reset PLX */
054f5b0a 4673 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
02f1175c 4674 udelay(100L);
054f5b0a 4675 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
02f1175c
JS		 4676
4677 /* Reload Config. Registers from EEPROM */
054f5b0a 4678 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
02f1175c 4679 udelay(100L);
054f5b0a
JS		 4680 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4681
4682 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4683 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4684 * registers. This will remain here until we find a permanent fix.
4685 */
4686 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4687}
4688
4689static int __devinit __cyz_load_fw(const struct firmware *fw,
4690 const char *name, const u32 mailbox, void __iomem *base,
4691 void __iomem *fpga)
4692{
f61e761e
DW		 4693 const void *ptr = fw->data;
4694 const struct zfile_header *h = ptr;
4695 const struct zfile_config *c, *cs;
4696 const struct zfile_block *b, *bs;
054f5b0a
JS		 4697 unsigned int a, tmp, len = fw->size;
4698#define BAD_FW KERN_ERR "Bad firmware: "
4699 if (len < sizeof(*h)) {
4700 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4701 return -EINVAL;
4702 }
4703
4704 cs = ptr + h->config_offset;
4705 bs = ptr + h->block_offset;
4706
4707 if ((void *)(cs + h->n_config) > ptr + len ||
4708 (void *)(bs + h->n_blocks) > ptr + len) {
4709 printk(BAD_FW "too short");
4710 return -EINVAL;
4711 }
4712
4713 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4714 cyc_isfwstr(h->date, sizeof(h->date))) {
4715 printk(BAD_FW "bad formatted header string\n");
4716 return -EINVAL;
4717 }
4718
4719 if (strncmp(name, h->name, sizeof(h->name))) {
4720 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4721 return -EINVAL;
4722 }
4723
4724 tmp = 0;
4725 for (c = cs; c < cs + h->n_config; c++) {
4726 for (a = 0; a < c->n_blocks; a++)
4727 if (c->block_list[a] > h->n_blocks) {
4728 printk(BAD_FW "bad block ref number in cfgs\n");
4729 return -EINVAL;
4730 }
4731 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4732 tmp++;
4733 }
4734 if (!tmp) {
4735 printk(BAD_FW "nothing appropriate\n");
4736 return -EINVAL;
4737 }
4738
4739 for (b = bs; b < bs + h->n_blocks; b++)
4740 if (b->file_offset + b->size > len) {
4741 printk(BAD_FW "bad block data offset\n");
4742 return -EINVAL;
4743 }
4744
4745 /* everything is OK, let's seek'n'load it */
4746 for (c = cs; c < cs + h->n_config; c++)
4747 if (c->mailbox == mailbox && c->function == 0)
4748 break;
4749
4750 for (a = 0; a < c->n_blocks; a++) {
4751 b = &bs[c->block_list[a]];
4752 if (b->type == ZBLOCK_FPGA) {
4753 if (fpga != NULL)
4754 cyz_fpga_copy(fpga, ptr + b->file_offset,
4755 b->size);
4756 } else {
4757 if (base != NULL)
4758 memcpy_toio(base + b->ram_offset,
4759 ptr + b->file_offset, b->size);
4760 }
4761 }
4762#undef BAD_FW
4763 return 0;
4764}
4765
4766static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4767 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4768{
4769 const struct firmware *fw;
4770 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4771 struct CUSTOM_REG __iomem *cust = base_addr;
4772 struct ZFW_CTRL __iomem *pt_zfwctrl;
c4923b4f 4773 void __iomem *tmp;
054f5b0a
JS		 4774 u32 mailbox, status;
4775 unsigned int i;
4776 int retval;
4777
4778 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4779 if (retval) {
4780 dev_err(&pdev->dev, "can't get firmware\n");
4781 goto err;
4782 }
4783
4784 /* Check whether the firmware is already loaded and running. If
4785 positive, skip this board */
2693f485 4786 if (__cyz_fpga_loaded(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
054f5b0a
JS		 4787 u32 cntval = readl(base_addr + 0x190);
4788
4789 udelay(100);
4790 if (cntval != readl(base_addr + 0x190)) {
4791 /* FW counter is working, FW is running */
4792 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4793 "Skipping board.\n");
4794 retval = 0;
4795 goto err_rel;
4796 }
4797 }
4798
4799 /* start boot */
4800 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4801 ~0x00030800UL);
4802
4803 mailbox = readl(&ctl_addr->mail_box_0);
4804
2693f485 4805 if (mailbox == 0 || __cyz_fpga_loaded(ctl_addr)) {
054f5b0a
JS		 4806 /* stops CPU and set window to beginning of RAM */
4807 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4808 cy_writel(&cust->cpu_stop, 0);
4809 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4810 udelay(100);
4811 }
4812
4813 plx_init(pdev, irq, ctl_addr);
4814
4815 if (mailbox != 0) {
4816 /* load FPGA */
4817 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4818 base_addr);
4819 if (retval)
4820 goto err_rel;
2693f485 4821 if (!__cyz_fpga_loaded(ctl_addr)) {
054f5b0a
JS		 4822 dev_err(&pdev->dev, "fw upload successful, but fw is "
4823 "not loaded\n");
4824 goto err_rel;
4825 }
4826 }
4827
4828 /* stops CPU and set window to beginning of RAM */
4829 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4830 cy_writel(&cust->cpu_stop, 0);
4831 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4832 udelay(100);
4833
4834 /* clear memory */
c4923b4f 4835 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
054f5b0a
JS		 4836 cy_writeb(tmp, 255);
4837 if (mailbox != 0) {
4838 /* set window to last 512K of RAM */
4839 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
c4923b4f 4840 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
054f5b0a
JS		 4841 cy_writeb(tmp, 255);
4842 /* set window to beginning of RAM */
4843 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
054f5b0a
JS		 4844 }
4845
4846 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4847 release_firmware(fw);
4848 if (retval)
4849 goto err;
4850
4851 /* finish boot and start boards */
4852 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4853 cy_writel(&cust->cpu_start, 0);
4854 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4855 i = 0;
4856 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4857 msleep(100);
4858 if (status != ZFIRM_ID) {
4859 if (status == ZFIRM_HLT) {
4860 dev_err(&pdev->dev, "you need an external power supply "
4861 "for this number of ports. Firmware halted and "
4862 "board reset.\n");
4863 retval = -EIO;
4864 goto err;
4865 }
4866 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4867 "some more time\n", status);
4868 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
4869 i++ < 200)
4870 msleep(100);
4871 if (status != ZFIRM_ID) {
4872 dev_err(&pdev->dev, "Board not started in 20 seconds! "
4873 "Giving up. (fid->signature = 0x%x)\n",
4874 status);
4875 dev_info(&pdev->dev, "*** Warning ***: if you are "
4876 "upgrading the FW, please power cycle the "
4877 "system before loading the new FW to the "
4878 "Cyclades-Z.\n");
4879
2693f485 4880 if (__cyz_fpga_loaded(ctl_addr))
054f5b0a
JS		 4881 plx_init(pdev, irq, ctl_addr);
4882
4883 retval = -EIO;
4884 goto err;
4885 }
4886 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
4887 i / 10);
4888 }
4889 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
4890
4891 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
4892 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
4893 base_addr + readl(&fid->zfwctrl_addr));
4894
4895 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
4896 readl(&pt_zfwctrl->board_ctrl.fw_version),
4897 readl(&pt_zfwctrl->board_ctrl.n_channel));
4898
4899 if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) {
4900 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
4901 "check the connection between the Z host card and the "
4902 "serial expanders.\n");
4903
2693f485 4904 if (__cyz_fpga_loaded(ctl_addr))
054f5b0a
JS		 4905 plx_init(pdev, irq, ctl_addr);
4906
4907 dev_info(&pdev->dev, "Null number of ports detected. Board "
4908 "reset.\n");
4909 retval = 0;
4910 goto err;
4911 }
4912
4913 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
4914 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
4915
4916 /*
4917 Early firmware failed to start looking for commands.
4918 This enables firmware interrupts for those commands.
4919 */
4920 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4921 (1 << 17));
4922 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
4923 0x00030800UL);
4924
054f5b0a
JS		 4925 return 0;
4926err_rel:
4927 release_firmware(fw);
4928err:
4929 return retval;
1da177e4
LT		 4930}
4931
58936d8d
JS		 4932static int __devinit cy_pci_probe(struct pci_dev *pdev,
4933 const struct pci_device_id *ent)
1da177e4 4934{
3137553d
JS		 4935 void __iomem *addr0 = NULL, *addr2 = NULL;
4936 char *card_name = NULL;
101b8159 4937 u32 uninitialized_var(mailbox);
3137553d
JS		 4938 unsigned int device_id, nchan = 0, card_no, i;
4939 unsigned char plx_ver;
4940 int retval, irq;
02f1175c 4941
58936d8d
JS		 4942 retval = pci_enable_device(pdev);
4943 if (retval) {
4944 dev_err(&pdev->dev, "cannot enable device\n");
3137553d 4945 goto err;
58936d8d 4946 }
1da177e4 4947
58936d8d 4948 /* read PCI configuration area */
3137553d 4949 irq = pdev->irq;
58936d8d 4950 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
1da177e4 4951
3137553d
JS		 4952#if defined(__alpha__)
4953 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4954 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
4955 "addresses on Alpha systems.\n");
4956 retval = -EIO;
4957 goto err_dis;
4958 }
4959#endif
4960 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4961 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
4962 "addresses\n");
4963 retval = -EIO;
4964 goto err_dis;
4965 }
4966
4967 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4968 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
4969 "it...\n");
4970 pdev->resource[2].flags &= ~IORESOURCE_IO;
4971 }
4972
4973 retval = pci_request_regions(pdev, "cyclades");
4974 if (retval) {
4975 dev_err(&pdev->dev, "failed to reserve resources\n");
4976 goto err_dis;
4977 }
4978
4979 retval = -EIO;
58936d8d
JS		 4980 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4981 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3137553d 4982 card_name = "Cyclom-Y";
1da177e4 4983
24e6fd4c
JS		 4984 addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
4985 CyPCI_Yctl);
3137553d
JS		 4986 if (addr0 == NULL) {
4987 dev_err(&pdev->dev, "can't remap ctl region\n");
4988 goto err_reg;
58936d8d 4989 }
24e6fd4c
JS		 4990 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
4991 CyPCI_Ywin);
3137553d
JS		 4992 if (addr2 == NULL) {
4993 dev_err(&pdev->dev, "can't remap base region\n");
4994 goto err_unmap;
58936d8d 4995 }
1da177e4 4996
3137553d
JS		 4997 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
4998 if (nchan == 0) {
21719191
JS		 4999 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
5000 "Serial-Modules\n");
c847d47c 5001 goto err_unmap;
58936d8d 5002 }
58936d8d 5003 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
3137553d 5004 struct RUNTIME_9060 __iomem *ctl_addr;
21719191 5005
24e6fd4c
JS		 5006 ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
5007 CyPCI_Zctl);
3137553d
JS		 5008 if (addr0 == NULL) {
5009 dev_err(&pdev->dev, "can't remap ctl region\n");
5010 goto err_reg;
5011 }
58936d8d
JS		 5012
5013 /* Disable interrupts on the PLX before resetting it */
97e87f8e
JS		 5014 cy_writew(&ctl_addr->intr_ctrl_stat,
5015 readw(&ctl_addr->intr_ctrl_stat) & ~0x0900);
58936d8d 5016
054f5b0a 5017 plx_init(pdev, irq, addr0);
02f1175c 5018
101b8159 5019 mailbox = readl(&ctl_addr->mail_box_0);
58936d8d 5020
24e6fd4c
JS		 5021 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
5022 mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
3137553d
JS		 5023 if (addr2 == NULL) {
5024 dev_err(&pdev->dev, "can't remap base region\n");
5025 goto err_unmap;
58936d8d
JS		 5026 }
5027
5028 if (mailbox == ZE_V1) {
3137553d
JS		 5029 card_name = "Cyclades-Ze";
5030
3137553d 5031 nchan = ZE_V1_NPORTS;
58936d8d 5032 } else {
3137553d 5033 card_name = "Cyclades-8Zo";
ace08c3c 5034 nchan = 8;
1da177e4
LT		 5035
5036#ifdef CY_PCI_DEBUG
3137553d
JS		 5037 if (mailbox == ZO_V1) {
5038 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5039 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5040 "id %lx, ver %lx\n", (ulong)(0xff &
5041 readl(&((struct CUSTOM_REG *)addr2)->
5042 fpga_id)), (ulong)(0xff &
5043 readl(&((struct CUSTOM_REG *)addr2)->
5044 fpga_version)));
5045 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5046 } else {
5047 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5048 "Cyclades-Z board. FPGA not loaded\n");
5049 }
1da177e4 5050#endif
3137553d
JS		 5051 /* The following clears the firmware id word. This
5052 ensures that the driver will not attempt to talk to
5053 the board until it has been properly initialized.
5054 */
5055 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5056 cy_writel(addr2 + ID_ADDRESS, 0L);
58936d8d 5057 }
ace08c3c
JS		 5058
5059 retval = cyz_load_fw(pdev, addr2, addr0, irq);
5060 if (retval)
5061 goto err_unmap;
3137553d
JS		 5062 }
5063
5064 if ((cy_next_channel + nchan) > NR_PORTS) {
5065 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5066 "channels are available. Change NR_PORTS in "
5067 "cyclades.c and recompile kernel.\n");
5068 goto err_unmap;
5069 }
5070 /* fill the next cy_card structure available */
5071 for (card_no = 0; card_no < NR_CARDS; card_no++) {
5072 if (cy_card[card_no].base_addr == NULL)
5073 break;
5074 }
5075 if (card_no == NR_CARDS) { /* no more cy_cards available */
5076 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5077 "more cards can be used. Change NR_CARDS in "
5078 "cyclades.c and recompile kernel.\n");
5079 goto err_unmap;
5080 }
5081
5082 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5083 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5084 /* allocate IRQ */
5085 retval = request_irq(irq, cyy_interrupt,
5086 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5087 if (retval) {
5088 dev_err(&pdev->dev, "could not allocate IRQ\n");
5089 goto err_unmap;
58936d8d 5090 }
3137553d
JS		 5091 cy_card[card_no].num_chips = nchan / 4;
5092 } else {
101b8159
JS		 5093 cy_card[card_no].hw_ver = mailbox;
5094 cy_card[card_no].num_chips = (unsigned int)-1;
02f1175c 5095#ifdef CONFIG_CYZ_INTR
58936d8d 5096 /* allocate IRQ only if board has an IRQ */
3137553d
JS		 5097 if (irq != 0 && irq != 255) {
5098 retval = request_irq(irq, cyz_interrupt,
58936d8d 5099 IRQF_SHARED, "Cyclades-Z",
3137553d 5100 &cy_card[card_no]);
58936d8d 5101 if (retval) {
21719191 5102 dev_err(&pdev->dev, "could not allocate IRQ\n");
3137553d 5103 goto err_unmap;
02f1175c 5104 }
58936d8d 5105 }
02f1175c 5106#endif /* CONFIG_CYZ_INTR */
3137553d 5107 }
02f1175c 5108
3137553d
JS		 5109 /* set cy_card */
5110 cy_card[card_no].base_addr = addr2;
97e87f8e 5111 cy_card[card_no].ctl_addr.p9050 = addr0;
3137553d
JS		 5112 cy_card[card_no].irq = irq;
5113 cy_card[card_no].bus_index = 1;
5114 cy_card[card_no].first_line = cy_next_channel;
5115 retval = cy_init_card(&cy_card[card_no]);
5116 if (retval)
5117 goto err_null;
58936d8d 5118
3137553d 5119 pci_set_drvdata(pdev, &cy_card[card_no]);
58936d8d 5120
3137553d
JS		 5121 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5122 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5123 /* enable interrupts in the PCI interface */
5124 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
5125 switch (plx_ver) {
5126 case PLX_9050:
3137553d
JS		 5127 cy_writeb(addr0 + 0x4c, 0x43);
5128 break;
5129
5130 case PLX_9060:
5131 case PLX_9080:
5132 default: /* Old boards, use PLX_9060 */
97e87f8e
JS		 5133 {
5134 struct RUNTIME_9060 __iomem *ctl_addr = addr0;
5135 plx_init(pdev, irq, ctl_addr);
5136 cy_writew(&ctl_addr->intr_ctrl_stat,
5137 readw(&ctl_addr->intr_ctrl_stat) | 0x0900);
3137553d
JS		 5138 break;
5139 }
97e87f8e 5140 }
58936d8d
JS		 5141 }
5142
3137553d
JS		 5143 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5144 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5145 for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5146 tty_register_device(cy_serial_driver, i, &pdev->dev);
5147 cy_next_channel += nchan;
5148
58936d8d 5149 return 0;
3137553d
JS		 5150err_null:
5151 cy_card[card_no].base_addr = NULL;
5152 free_irq(irq, &cy_card[card_no]);
5153err_unmap:
24e6fd4c 5154 iounmap(addr0);
3137553d 5155 if (addr2)
24e6fd4c 5156 iounmap(addr2);
3137553d
JS		 5157err_reg:
5158 pci_release_regions(pdev);
5159err_dis:
5160 pci_disable_device(pdev);
5161err:
5162 return retval;
58936d8d 5163}
58936d8d 5164
6747cd93 5165static void __devexit cy_pci_remove(struct pci_dev *pdev)
58936d8d 5166{
38d09093 5167 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
f3851e73 5168 unsigned int i;
38d09093 5169
85c93fa9 5170 /* non-Z with old PLX */
2693f485 5171 if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
c2ad4c75 5172 PLX_9050)
97e87f8e 5173 cy_writeb(cinfo->ctl_addr.p9050 + 0x4c, 0);
85c93fa9
JS		 5174 else
5175#ifndef CONFIG_CYZ_INTR
2693f485 5176 if (!cy_is_Z(cinfo))
85c93fa9 5177#endif
97e87f8e
JS		 5178 cy_writew(&cinfo->ctl_addr.p9060->intr_ctrl_stat,
5179 readw(&cinfo->ctl_addr.p9060->intr_ctrl_stat) &
5180 ~0x0900);
85c93fa9 5181
24e6fd4c 5182 iounmap(cinfo->base_addr);
97e87f8e
JS		 5183 if (cinfo->ctl_addr.p9050)
5184 iounmap(cinfo->ctl_addr.p9050);
38d09093
JS		 5185 if (cinfo->irq
5186#ifndef CONFIG_CYZ_INTR
2693f485 5187 && !cy_is_Z(cinfo)
38d09093
JS		 5188#endif /* CONFIG_CYZ_INTR */
5189 )
5190 free_irq(cinfo->irq, cinfo);
5191 pci_release_regions(pdev);
5192
5193 cinfo->base_addr = NULL;
6ad1ccc1
JS		 5194 for (i = cinfo->first_line; i < cinfo->first_line +
5195 cinfo->nports; i++)
5196 tty_unregister_device(cy_serial_driver, i);
dd025c0c
JS		 5197 cinfo->nports = 0;
5198 kfree(cinfo->ports);
38d09093
JS		 5199}
5200
6747cd93
JS		 5201static struct pci_driver cy_pci_driver = {
5202 .name = "cyclades",
5203 .id_table = cy_pci_dev_id,
5204 .probe = cy_pci_probe,
5205 .remove = __devexit_p(cy_pci_remove)
5206};
5207#endif
5208
444697d6 5209static int cyclades_proc_show(struct seq_file *m, void *v)
1da177e4 5210{
02f1175c 5211 struct cyclades_port *info;
dd025c0c 5212 unsigned int i, j;
02f1175c
JS		 5213 __u32 cur_jifs = jiffies;
5214
444697d6 5215 seq_puts(m, "Dev TimeOpen BytesOut IdleOut BytesIn "
02f1175c
JS		 5216 "IdleIn Overruns Ldisc\n");
5217
02f1175c 5218 /* Output one line for each known port */
dd025c0c
JS		 5219 for (i = 0; i < NR_CARDS; i++)
5220 for (j = 0; j < cy_card[i].nports; j++) {
5221 info = &cy_card[i].ports[j];
5222
77451e53 5223 if (info->port.count)
444697d6 5224 seq_printf(m, "%3d %8lu %10lu %8lu "
dd025c0c
JS		 5225 "%10lu %8lu %9lu %6ld\n", info->line,
5226 (cur_jifs - info->idle_stats.in_use) /
5227 HZ, info->idle_stats.xmit_bytes,
5228 (cur_jifs - info->idle_stats.xmit_idle)/
5229 HZ, info->idle_stats.recv_bytes,
5230 (cur_jifs - info->idle_stats.recv_idle)/
5231 HZ, info->idle_stats.overruns,
a352def2 5232 /* FIXME: double check locking */
77451e53 5233 (long)info->port.tty->ldisc.ops->num);
dd025c0c 5234 else
444697d6 5235 seq_printf(m, "%3d %8lu %10lu %8lu "
dd025c0c
JS		 5236 "%10lu %8lu %9lu %6ld\n",
5237 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
02f1175c 5238 }
444697d6
AD		 5239 return 0;
5240}
5241
5242static int cyclades_proc_open(struct inode *inode, struct file *file)
5243{
5244 return single_open(file, cyclades_proc_show, NULL);
1da177e4
LT		 5245}
5246
444697d6
AD		 5247static const struct file_operations cyclades_proc_fops = {
5248 .owner = THIS_MODULE,
5249 .open = cyclades_proc_open,
5250 .read = seq_read,
5251 .llseek = seq_lseek,
5252 .release = single_release,
5253};
5254
1da177e4
LT		 5255/* The serial driver boot-time initialization code!
5256 Hardware I/O ports are mapped to character special devices on a
5257 first found, first allocated manner. That is, this code searches
5258 for Cyclom cards in the system. As each is found, it is probed
5259 to discover how many chips (and thus how many ports) are present.
5260 These ports are mapped to the tty ports 32 and upward in monotonic
5261 fashion. If an 8-port card is replaced with a 16-port card, the
5262 port mapping on a following card will shift.
5263
5264 This approach is different from what is used in the other serial
5265 device driver because the Cyclom is more properly a multiplexer,
5266 not just an aggregation of serial ports on one card.
5267
5268 If there are more cards with more ports than have been
5269 statically allocated above, a warning is printed and the
5270 extra ports are ignored.
5271 */
5272
b68e31d0 5273static const struct tty_operations cy_ops = {
02f1175c
JS		 5274 .open = cy_open,
5275 .close = cy_close,
5276 .write = cy_write,
5277 .put_char = cy_put_char,
5278 .flush_chars = cy_flush_chars,
5279 .write_room = cy_write_room,
5280 .chars_in_buffer = cy_chars_in_buffer,
5281 .flush_buffer = cy_flush_buffer,
5282 .ioctl = cy_ioctl,
5283 .throttle = cy_throttle,
5284 .unthrottle = cy_unthrottle,
5285 .set_termios = cy_set_termios,
5286 .stop = cy_stop,
5287 .start = cy_start,
5288 .hangup = cy_hangup,
5289 .break_ctl = cy_break,
5290 .wait_until_sent = cy_wait_until_sent,
02f1175c
JS		 5291 .tiocmget = cy_tiocmget,
5292 .tiocmset = cy_tiocmset,
444697d6 5293 .proc_fops = &cyclades_proc_fops,
1da177e4
LT		 5294};
5295
02f1175c 5296static int __init cy_init(void)
1da177e4 5297{
dd025c0c 5298 unsigned int nboards;
9dacf3b2 5299 int retval = -ENOMEM;
02f1175c
JS		 5300
5301 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5302 if (!cy_serial_driver)
9dacf3b2 5303 goto err;
21719191
JS		 5304
5305 printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5306 __DATE__, __TIME__);
02f1175c
JS		 5307
5308 /* Initialize the tty_driver structure */
5309
5310 cy_serial_driver->owner = THIS_MODULE;
5311 cy_serial_driver->driver_name = "cyclades";
5312 cy_serial_driver->name = "ttyC";
5313 cy_serial_driver->major = CYCLADES_MAJOR;
5314 cy_serial_driver->minor_start = 0;
5315 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5316 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5317 cy_serial_driver->init_termios = tty_std_termios;
5318 cy_serial_driver->init_termios.c_cflag =
5319 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
6ad1ccc1 5320 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
02f1175c
JS		 5321 tty_set_operations(cy_serial_driver, &cy_ops);
5322
9dacf3b2
JS		 5323 retval = tty_register_driver(cy_serial_driver);
5324 if (retval) {
5325 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5326 goto err_frtty;
5327 }
02f1175c 5328
02f1175c
JS		 5329 /* the code below is responsible to find the boards. Each different
5330 type of board has its own detection routine. If a board is found,
5331 the next cy_card structure available is set by the detection
5332 routine. These functions are responsible for checking the
5333 availability of cy_card and cy_port data structures and updating
5334 the cy_next_channel. */
5335
5336 /* look for isa boards */
14a55a67 5337 nboards = cy_detect_isa();
02f1175c 5338
6747cd93 5339#ifdef CONFIG_PCI
02f1175c 5340 /* look for pci boards */
6747cd93 5341 retval = pci_register_driver(&cy_pci_driver);
d941ea7d
JJ		 5342 if (retval && !nboards) {
5343 tty_unregister_driver(cy_serial_driver);
5344 goto err_frtty;
5345 }
6747cd93 5346#endif
9dacf3b2
JS		 5347
5348 return 0;
9dacf3b2
JS		 5349err_frtty:
5350 put_tty_driver(cy_serial_driver);
5351err:
5352 return retval;
02f1175c 5353} /* cy_init */
1da177e4 5354
02f1175c 5355static void __exit cy_cleanup_module(void)
1da177e4 5356{
dd025c0c 5357 struct cyclades_card *card;
65f76a82 5358 unsigned int i, e1;
1da177e4
LT		 5359
5360#ifndef CONFIG_CYZ_INTR
b7050906 5361 del_timer_sync(&cyz_timerlist);
1da177e4
LT		 5362#endif /* CONFIG_CYZ_INTR */
5363
15ed6cc0
AC		 5364 e1 = tty_unregister_driver(cy_serial_driver);
5365 if (e1)
21719191
JS		 5366 printk(KERN_ERR "failed to unregister Cyclades serial "
5367 "driver(%d)\n", e1);
1da177e4 5368
6747cd93
JS		 5369#ifdef CONFIG_PCI
5370 pci_unregister_driver(&cy_pci_driver);
5371#endif
5372
02f1175c 5373 for (i = 0; i < NR_CARDS; i++) {
dd025c0c
JS		 5374 card = &cy_card[i];
5375 if (card->base_addr) {
85c93fa9 5376 /* clear interrupt */
dd025c0c
JS		 5377 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5378 iounmap(card->base_addr);
97e87f8e
JS		 5379 if (card->ctl_addr.p9050)
5380 iounmap(card->ctl_addr.p9050);
dd025c0c 5381 if (card->irq
1da177e4 5382#ifndef CONFIG_CYZ_INTR
2693f485 5383 && !cy_is_Z(card)
1da177e4 5384#endif /* CONFIG_CYZ_INTR */
02f1175c 5385 )
dd025c0c 5386 free_irq(card->irq, card);
65f76a82 5387 for (e1 = card->first_line; e1 < card->first_line +
dd025c0c 5388 card->nports; e1++)
6ad1ccc1 5389 tty_unregister_device(cy_serial_driver, e1);
dd025c0c 5390 kfree(card->ports);
02f1175c
JS		 5391 }
5392 }
f2462bfe
JS		 5393
5394 put_tty_driver(cy_serial_driver);
1da177e4
LT		 5395} /* cy_cleanup_module */
5396
5397module_init(cy_init);
5398module_exit(cy_cleanup_module);
5399
5400MODULE_LICENSE("GPL");
c8e1693a 5401MODULE_VERSION(CY_VERSION);
9f56fad7 5402MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);
Linux 6.x block layer and io_uring tree(s)