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Char: cyclades, create cy_init_Ze
[linux-2.6/sactl.git] / drivers / char / cyclades.c
blob1430e136d44d2179eabc3fcd39ebd1969ee93ba6
1 #undef BLOCKMOVE
2 #define Z_WAKE
3 #undef Z_EXT_CHARS_IN_BUFFER
4
5 /*
6 * linux/drivers/char/cyclades.c
7 *
8 * This file contains the driver for the Cyclades async multiport
9 * serial boards.
10 *
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
13 * Currently maintained by Cyclades team <async@cyclades.com>.
14 *
15 * For Technical support and installation problems, please send e-mail
16 * to support@cyclades.com.
17 *
18 * Much of the design and some of the code came from serial.c
19 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
20 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
21 * and then fixed as suggested by Michael K. Johnson 12/12/92.
22 *
23 * This version supports shared IRQ's (only for PCI boards).
24 *
25 * $Log: cyclades.c,v $
26 * Prevent users from opening non-existing Z ports.
27 *
28 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
29 * Fixed the PCI detection function to work properly on Alpha systems.
30 * Implemented support for TIOCSERGETLSR ioctl.
31 * Implemented full support for non-standard baud rates.
32 *
33 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
34 * Request PLX I/O region, although driver doesn't use it, to avoid
35 * problems with other drivers accessing it.
36 * Removed count for on-board buffer characters in cy_chars_in_buffer
37 * (Cyclades-Z only).
38 *
39 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
40 * Driver now reports physical instead of virtual memory addresses.
41 * Masks were added to some Cyclades-Z read accesses.
42 * Implemented workaround for PLX9050 bug that would cause a system lockup
43 * in certain systems, depending on the MMIO addresses allocated to the
44 * board.
45 * Changed the Tx interrupt programming in the CD1400 chips to boost up
46 * performance (Cyclom-Y only).
47 * Code is now compliant with the new module interface (module_[init|exit]).
48 * Make use of the PCI helper functions to access PCI resources.
49 * Did some code "housekeeping".
50 *
51 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
52 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
53 *
54 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
55 * Fixed SMP locking in Cyclom-Y interrupt handler.
56 *
57 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
58 * Added a new cyclades_card field called nports to allow the driver to
59 * know the exact number of ports found by the Z firmware after its load;
60 * RX buffer contention prevention logic on interrupt op mode revisited
61 * (Cyclades-Z only);
62 * Revisited printk's for Z debug;
63 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
64 *
65 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
66 * Fixed bug in cyz_poll that would make all ports but port 0
67 * unable to transmit/receive data (Cyclades-Z only);
68 * Implemented logic to prevent the RX buffer from being stuck with data
69 * due to a driver / firmware race condition in interrupt op mode
70 * (Cyclades-Z only);
71 * Fixed bug in block_til_ready logic that would lead to a system crash;
72 * Revisited cy_close spinlock usage;
73 *
74 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
75 * Revisited CONFIG_PCI conditional compilation for PCI board support;
76 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
77 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
78 * Removed CTS handling from the driver -- this is now completely handled
79 * by the firmware (Cyclades-Z only);
80 * Flush RX on-board buffers on a port open (Cyclades-Z only);
81 * Fixed handling of ASYNC_SPD_* TTY flags;
82 * Module unload now unmaps all memory area allocated by ioremap;
83 *
84 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
85 * Removed CY_PROC conditional compilation;
86 * Implemented SMP-awareness for the driver;
87 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
88 * functions;
89 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
90 * (irq=NN) as parameters (only for ISA boards);
91 * Fixed bug in set_line_char that would prevent the Cyclades-Z
92 * ports from being configured at speeds above 115.2Kbps;
93 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
94 * switching from working properly;
95 * The driver now only prints IRQ info for the Cyclades-Z if it's
96 * configured to work in interrupt mode;
97 *
98 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
99 * Added support for interrupt mode operation for the Z cards;
100 * Removed the driver inactivity control for the Z;
101 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
102 * the Z firmware is not loaded yet;
103 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
104 * same functionality;
105 * Implemented workaround for IRQ setting loss on the PCI configuration
106 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
107 *
108 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
109 * /proc entry location changed to /proc/tty/driver/cyclades;
110 * Added support to shared IRQ's (only for PCI boards);
111 * Added support for Cobalt Qube2 systems;
112 * IRQ [de]allocation scheme revisited;
113 * BREAK implementation changed in order to make use of the 'break_ctl'
114 * TTY facility;
115 * Fixed typo in TTY structure field 'driver_name';
116 * Included a PCI bridge reset and EEPROM reload in the board
117 * initialization code (for both Y and Z series).
118 *
119 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
120 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
121 * closed properly after a SIGINT;
122 * Module usage counter scheme revisited;
123 * Added support to the upcoming Y PCI boards (i.e., support to additional
124 * PCI Device ID's).
125 *
126 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
127 * Removed all unnecessary page-alignement operations in ioremap calls
128 * (ioremap is currently safe for these operations).
129 *
130 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
131 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
132 * order to make PLX9050-based boards work with certain motherboards.
133 *
134 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
135 * cy_close function now resets (correctly) the tty->closing flag;
136 * JIFFIES_DIFF macro fixed.
137 *
138 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
139 * Fixed bug in cy_close function, which was not informing HW of
140 * which port should have the reception disabled before doing so;
141 * fixed Cyclom-8YoP hardware detection bug.
142 *
143 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
144 * Fixed bug in cy_close function, which causes malfunction
145 * of one of the first 4 ports when a higher port is closed
146 * (Cyclom-Y only).
147 *
148 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
149 * Fixed Cyclom-4Yo hardware detection bug.
150 *
151 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
152 * /proc/cyclades implementation with great collaboration of
153 * Marc Lewis <marc@blarg.net>;
154 * cyy_interrupt was changed to avoid occurrence of kernel oopses
155 * during PPP operation.
156 *
157 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
158 * General code review in order to comply with 2.1 kernel standards;
159 * data loss prevention for slow devices revisited (cy_wait_until_sent
160 * was created);
161 * removed conditional compilation for new/old PCI structure support
162 * (now the driver only supports the new PCI structure).
163 *
164 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
165 * added conditional compilation for new/old PCI structure support;
166 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
167 *
168 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
169 * cleaned up the data loss fix;
170 * fixed XON/XOFF handling once more (Cyclades-Z);
171 * general review of the driver routines;
172 * introduction of a mechanism to prevent data loss with slow
173 * printers, by forcing a delay before closing the port.
174 *
175 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
176 * fixed detection/handling of new CD1400 in Ye boards;
177 * fixed XON/XOFF handling (Cyclades-Z);
178 * fixed data loss caused by a premature port close;
179 * introduction of a flag that holds the CD1400 version ID per port
180 * (used by the CYGETCD1400VER new ioctl).
181 *
182 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
183 * Code review for the module cleanup routine;
184 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
185 * includes anonymous changes regarding signal_pending.
186 *
187 * Revision 2.1 1997/11/01 17:42:41 ivan
188 * Changes in the driver to support Alpha systems (except 8Zo V_1);
189 * BREAK fix for the Cyclades-Z boards;
190 * driver inactivity control by FW implemented;
191 * introduction of flag that allows driver to take advantage of
192 * a special CD1400 feature related to HW flow control;
193 * added support for the CD1400 rev. J (Cyclom-Y boards);
194 * introduction of ioctls to:
195 * - control the rtsdtr_inv flag (Cyclom-Y);
196 * - control the rflow flag (Cyclom-Y);
197 * - adjust the polling interval (Cyclades-Z);
198 *
199 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
200 * Fixes related to kernel version conditional
201 * compilation.
202 *
203 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
204 * Compatibility issues between kernels 2.0.x and
205 * 2.1.x (mainly related to clear_bit function).
206 *
207 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
208 * Changes to define the memory window according to the
209 * board type.
210 *
211 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
212 * Changes to support new cycladesZ boards.
213 *
214 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
215 * Merge of Bentson's and Daniel's version 1.36.4.28.
216 * Corrects bug in cy_detect_pci: check if there are more
217 * ports than the number of static structs allocated.
218 * Warning message during initialization if this driver is
219 * used with the new generation of cycladesZ boards. Those
220 * will be supported only in next release of the driver.
221 * Corrects bug in cy_detect_pci and cy_detect_isa that
222 * returned wrong number of VALID boards, when a cyclomY
223 * was found with no serial modules connected.
224 * Changes to use current (2.1.x) kernel subroutine names
225 * and created macros for compilation with 2.0.x kernel,
226 * instead of the other way around.
227 *
228 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
229 * Change queue_task_irq_off to queue_task_irq.
230 * The inline function queue_task_irq_off (tqueue.h)
231 * was removed from latest releases of 2.1.x kernel.
232 * Use of macro __init to mark the initialization
233 * routines, so memory can be reused.
234 * Also incorporate implementation of critical region
235 * in function cleanup_module() created by anonymous
236 * linuxer.
237 *
238 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
239 * Change to support new firmware that solves DCD problem:
240 * application could fail to receive SIGHUP signal when DCD
241 * varying too fast.
242 *
243 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
244 * Changed for support linux versions 2.1.X.
245 * Backward compatible with linux versions 2.0.X.
246 * Corrected illegal use of filler field in
247 * CH_CTRL struct.
248 * Deleted some debug messages.
249 *
250 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
251 * Included check for NULL tty pointer in cyz_poll.
252 *
253 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
254 * Bill Foster at Blarg! Online services noticed that
255 * some of the switch elements of -Z modem control
256 * lacked a closing "break;"
257 *
258 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
259 * Changed low water threshold for buffer xmit_buf
260 *
261 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
262 * Marcio provided fix to modem status fetch for -Z
263 *
264 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
265 * improve mapping of -Z control page (thanks to Steve
266 * Price <stevep@fa.tdktca.com> for help on this)
267 *
268 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
269 * shift from CPU-bound to memcopy in cyz_polling operation
270 *
271 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
272 * Added support to set and report higher speeds.
273 *
274 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
275 * Some fixes in the HW flow control for the BETA release.
276 * Don't try to register the IRQ.
277 *
278 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
279 * make sure "cyc" appears in all kernel messages; all soft interrupts
280 * handled by same routine; recognize out-of-band reception; comment
281 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
282 * fix race condition in -Z buffer management; only -Y needs to explicitly
283 * flush chars; tidy up some startup messages;
284 *
285 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
286 * shift MOD_INC_USE_COUNT location to match
287 * serial.c; purge some diagnostic messages;
288 *
289 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
290 * enable modem status messages and fetch & process them; note
291 * time of last activity type for each port; set_line_char now
292 * supports more than line 0 and treats 0 baud correctly;
293 * get_modem_info senses rs_status;
294 *
295 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
296 * barely works--now's time to turn on
297 * more features 'til it breaks
298 *
299 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
300 * check more -Z board status; shorten boot message
301 *
302 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
303 * fix reference to ch_ctrl in startup; verify return
304 * values from cyz_issue_cmd and cyz_update_channel;
305 * more stuff to get modem control correct;
306 *
307 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
308 * more -Z stuff folded in; re-order changes to put -Z stuff
309 * after -Y stuff (to make changes clearer)
310 *
311 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
312 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
313 * Add code to send break. Clear firmware ID word at startup (so
314 * that other code won't talk to inactive board).
315 *
316 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
317 * add code for -Z in set_line_char
318 *
319 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
320 * fold more -Z stuff (or in some cases, error messages)
321 * into driver; add text to "don't know what to do" messages.
322 *
323 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
324 * moved compile-time flags near top of file; cosmetic changes
325 * to narrow text (to allow 2-up printing); changed many declarations
326 * to "static" to limit external symbols; shuffled code order to
327 * coalesce -Y and -Z specific code, also to put internal functions
328 * in order of tty_driver structure; added code to recognize -Z
329 * ports (and for moment, do nothing or report error); add cy_startup
330 * to parse boot command line for extra base addresses for ISA probes;
331 *
332 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
333 * reorder some code, fix types of some vars (int vs. long),
334 * add cy_setup to support user declared ISA addresses
335 *
336 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
337 * dump ioctl based firmware load (it's now a user level
338 * program); ensure uninitialzed ports cannot be used
339 *
340 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
341 * rename vars and restructure some code
342 *
343 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
344 * get right status back after boot load
345 *
346 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
347 * successfully loads firmware
348 *
349 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
350 * add more of the code for the boot/load ioctls
351 *
352 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
353 * start to add Z functionality--starting with ioctl
354 * for loading firmware
355 *
356 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
357 * added code to recognize Z/PCI card at initialization; report
358 * presence, but card is not initialized (because firmware needs
359 * to be loaded)
360 *
361 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
362 * starting minor number at zero; added missing verify_area
363 * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
364 *
365 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
366 * remove unneeded boot message & fix CLOCAL hardware flow
367 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
368 * remove unused diagnostic statements; minor 0 is first;
369 *
370 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
371 * The kernel function vremap (available only in later 1.3.xx kernels)
372 * allows the access to memory addresses above the RAM. This revision
373 * of the driver supports PCI boards below 1Mb (device id 0x100) and
374 * above 1Mb (device id 0x101).
375 *
376 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
377 * Some global changes to interrupt handling spilled into
378 * this driver--mostly unused arguments in system function
379 * calls. Also added change by Marcio Saito which should
380 * reduce lost interrupts at startup by fast processors.
381 *
382 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
383 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
384 * in 1.3.41 kernel to remove a possible race condition, extend
385 * some error messages, and let the driver run as a loadable module
386 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
387 * possible race condition.
388 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
389 *
390 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
391 * Changes by Linus Torvalds in 1.3.33 kernel distribution
392 * required due to reordering of driver initialization.
393 * Drivers are now initialized *after* memory management.
394 *
395 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
396 * remove printk from ISR; fix typo
397 *
398 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
399 * Minor fixes in the PCI board support. PCI function calls in
400 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
401 * <duncan@okay.com>. "bad serial count" message removed.
402 *
403 * Revision 1.36.3 1995/08/22 09:19:42 marcio
404 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
405 * board initialization. Changes in the boot messages. The driver
406 * supports up to 4 boards and 64 ports by default.
407 *
408 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
409 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
410 *
411 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
412 * add missing break in modem control block in ioctl switch statement
413 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
414 *
415 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
416 * make sure CTS flow control is set as soon as possible (thanks
417 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
418 *
419 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
420 * initialize defaults for receive threshold and stale data timeout;
421 * cosmetic changes;
422 *
423 * Revision 1.36 1995/03/10 23:33:53 bentson
424 * added support of chips 4-7 in 32 port Cyclom-Ye;
425 * fix cy_interrupt pointer dereference problem
426 * (Joe Portman <baron@aa.net>);
427 * give better error response if open is attempted on non-existent port
428 * (Zachariah Vaum <jchryslr@netcom.com>);
429 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
430 * conditional compilation for -16Y on systems with fast, noisy bus;
431 * comment out diagnostic print function;
432 * cleaned up table of base addresses;
433 * set receiver time-out period register to correct value,
434 * set receive threshold to better default values,
435 * set chip timer to more accurate 200 Hz ticking,
436 * add code to monitor and modify receive parameters
437 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
438 * <njs@scifi.emi.net>);
439 *
440 * Revision 1.35 1994/12/16 13:54:18 steffen
441 * additional patch by Marcio Saito for board detection
442 * Accidently left out in 1.34
443 *
444 * Revision 1.34 1994/12/10 12:37:12 steffen
445 * This is the corrected version as suggested by Marcio Saito
446 *
447 * Revision 1.33 1994/12/01 22:41:18 bentson
448 * add hooks to support more high speeds directly; add tytso
449 * patch regarding CLOCAL wakeups
450 *
451 * Revision 1.32 1994/11/23 19:50:04 bentson
452 * allow direct kernel control of higher signalling rates;
453 * look for cards at additional locations
454 *
455 * Revision 1.31 1994/11/16 04:33:28 bentson
456 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
457 * a problem in chars_in_buffer has been resolved by some
458 * small changes; this should yield smoother output
459 *
460 * Revision 1.30 1994/11/16 04:28:05 bentson
461 * Fix from Corey Minyard, Internet: minyard@metronet.com,
462 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
463 * cy_hangup that appears to clear up much (all?) of the
464 * DTR glitches; also he's added/cleaned-up diagnostic messages
465 *
466 * Revision 1.29 1994/11/16 04:16:07 bentson
467 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
468 * operate higher speeds in same way as other serial ports;
469 * add more serial ports (for up to two 16-port muxes).
470 *
471 * Revision 1.28 1994/11/04 00:13:16 root
472 * turn off diagnostic messages
473 *
474 * Revision 1.27 1994/11/03 23:46:37 root
475 * bunch of changes to bring driver into greater conformance
476 * with the serial.c driver (looking for missed fixes)
477 *
478 * Revision 1.26 1994/11/03 22:40:36 root
479 * automatic interrupt probing fixed.
480 *
481 * Revision 1.25 1994/11/03 20:17:02 root
482 * start to implement auto-irq
483 *
484 * Revision 1.24 1994/11/03 18:01:55 root
485 * still working on modem signals--trying not to drop DTR
486 * during the getty/login processes
487 *
488 * Revision 1.23 1994/11/03 17:51:36 root
489 * extend baud rate support; set receive threshold as function
490 * of baud rate; fix some problems with RTS/CTS;
491 *
492 * Revision 1.22 1994/11/02 18:05:35 root
493 * changed arguments to udelay to type long to get
494 * delays to be of correct duration
495 *
496 * Revision 1.21 1994/11/02 17:37:30 root
497 * employ udelay (after calibrating loops_per_second earlier
498 * in init/main.c) instead of using home-grown delay routines
499 *
500 * Revision 1.20 1994/11/02 03:11:38 root
501 * cy_chars_in_buffer forces a return value of 0 to let
502 * login work (don't know why it does); some functions
503 * that were returning EFAULT, now executes the code;
504 * more work on deciding when to disable xmit interrupts;
505 *
506 * Revision 1.19 1994/11/01 20:10:14 root
507 * define routine to start transmission interrupts (by enabling
508 * transmit interrupts); directly enable/disable modem interrupts;
509 *
510 * Revision 1.18 1994/11/01 18:40:45 bentson
511 * Don't always enable transmit interrupts in startup; interrupt on
512 * TxMpty instead of TxRdy to help characters get out before shutdown;
513 * restructure xmit interrupt to check for chars first and quit if
514 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
515 * (to my view);
516 *
517 * Revision 1.17 1994/10/30 04:39:45 bentson
518 * rename serial_driver and callout_driver to cy_serial_driver and
519 * cy_callout_driver to avoid linkage interference; initialize
520 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
521 * from cyclades_port structure; add paranoia check to cy_close;
522 *
523 * Revision 1.16 1994/10/30 01:14:33 bentson
524 * change major numbers; add some _early_ return statements;
525 *
526 * Revision 1.15 1994/10/29 06:43:15 bentson
527 * final tidying up for clean compile; enable some error reporting
528 *
529 * Revision 1.14 1994/10/28 20:30:22 Bentson
530 * lots of changes to drag the driver towards the new tty_io
531 * structures and operation. not expected to work, but may
532 * compile cleanly.
533 *
534 * Revision 1.13 1994/07/21 23:08:57 Bentson
535 * add some diagnostic cruft; support 24 lines (for testing
536 * both -8Y and -16Y cards; be more thorough in servicing all
537 * chips during interrupt; add "volatile" a few places to
538 * circumvent compiler optimizations; fix base & offset
539 * computations in block_til_ready (was causing chip 0 to
540 * stop operation)
541 *
542 * Revision 1.12 1994/07/19 16:42:11 Bentson
543 * add some hackery for kernel version 1.1.8; expand
544 * error messages; refine timing for delay loops and
545 * declare loop params volatile
546 *
547 * Revision 1.11 1994/06/11 21:53:10 bentson
548 * get use of save_car right in transmit interrupt service
549 *
550 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
551 * add some diagnostic printing; try to fix save_car stuff
552 *
553 * Revision 1.10 1994/06/11 20:36:08 bentson
554 * clean up compiler warnings
555 *
556 * Revision 1.9 1994/06/11 19:42:46 bentson
557 * added a bunch of code to support modem signalling
558 *
559 * Revision 1.8 1994/06/11 17:57:07 bentson
560 * recognize break & parity error
561 *
562 * Revision 1.7 1994/06/05 05:51:34 bentson
563 * Reorder baud table to be monotonic; add cli to CP; discard
564 * incoming characters and status if the line isn't open; start to
565 * fold code into cy_throttle; start to port get_serial_info,
566 * set_serial_info, get_modem_info, set_modem_info, and send_break
567 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
568 * get flow control characters from tty struct; invalidate ports w/o
569 * hardware;
570 *
571 * Revision 1.6 1994/05/31 18:42:21 bentson
572 * add a loop-breaker in the interrupt service routine;
573 * note when port is initialized so that it can be shut
574 * down under the right conditions; receive works without
575 * any obvious errors
576 *
577 * Revision 1.5 1994/05/30 00:55:02 bentson
578 * transmit works without obvious errors
579 *
580 * Revision 1.4 1994/05/27 18:46:27 bentson
581 * incorporated more code from lib_y.c; can now print short
582 * strings under interrupt control to port zero; seems to
583 * select ports/channels/lines correctly
584 *
585 * Revision 1.3 1994/05/25 22:12:44 bentson
586 * shifting from multi-port on a card to proper multiplexor
587 * data structures; added skeletons of most routines
588 *
589 * Revision 1.2 1994/05/19 13:21:43 bentson
590 * start to crib from other sources
591 *
592 */
593
594 #define CY_VERSION "2.4"
595
596 /* If you need to install more boards than NR_CARDS, change the constant
597 in the definition below. No other change is necessary to support up to
598 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
599
600 #define NR_CARDS 4
601
602 /*
603 If the total number of ports is larger than NR_PORTS, change this
604 constant in the definition below. No other change is necessary to
605 support more boards/ports. */
606
607 #define NR_PORTS 256
608
609 #define ZE_V1_NPORTS 64
610 #define ZO_V1 0
611 #define ZO_V2 1
612 #define ZE_V1 2
613
614 #define SERIAL_PARANOIA_CHECK
615 #undef CY_DEBUG_OPEN
616 #undef CY_DEBUG_THROTTLE
617 #undef CY_DEBUG_OTHER
618 #undef CY_DEBUG_IO
619 #undef CY_DEBUG_COUNT
620 #undef CY_DEBUG_DTR
621 #undef CY_DEBUG_WAIT_UNTIL_SENT
622 #undef CY_DEBUG_INTERRUPTS
623 #undef CY_16Y_HACK
624 #undef CY_ENABLE_MONITORING
625 #undef CY_PCI_DEBUG
626
627 /*
628 * Include section
629 */
630 #include <linux/module.h>
631 #include <linux/errno.h>
632 #include <linux/signal.h>
633 #include <linux/sched.h>
634 #include <linux/timer.h>
635 #include <linux/interrupt.h>
636 #include <linux/tty.h>
637 #include <linux/tty_flip.h>
638 #include <linux/serial.h>
639 #include <linux/major.h>
640 #include <linux/string.h>
641 #include <linux/fcntl.h>
642 #include <linux/ptrace.h>
643 #include <linux/cyclades.h>
644 #include <linux/mm.h>
645 #include <linux/ioport.h>
646 #include <linux/init.h>
647 #include <linux/delay.h>
648 #include <linux/spinlock.h>
649 #include <linux/bitops.h>
650
651 #include <asm/system.h>
652 #include <asm/io.h>
653 #include <asm/irq.h>
654 #include <asm/uaccess.h>
655
656 #define CY_LOCK(info,flags) \
657 do { \
658 spin_lock_irqsave(&cy_card[info->card].card_lock, flags); \
659 } while (0)
660
661 #define CY_UNLOCK(info,flags) \
662 do { \
663 spin_unlock_irqrestore(&cy_card[info->card].card_lock, flags); \
664 } while (0)
665
666 #include <linux/kernel.h>
667 #include <linux/pci.h>
668
669 #include <linux/stat.h>
670 #include <linux/proc_fs.h>
671
672 static void cy_throttle(struct tty_struct *tty);
673 static void cy_send_xchar(struct tty_struct *tty, char ch);
674
675 #define IS_CYC_Z(card) ((card).num_chips == -1)
676
677 #define Z_FPGA_CHECK(card) \
678 ((readl(&((struct RUNTIME_9060 __iomem *) \
679 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
680
681 #define ISZLOADED(card) (((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \
682 ((card).ctl_addr))->mail_box_0)) || \
683 Z_FPGA_CHECK(card)) && \
684 (ZFIRM_ID==readl(&((struct FIRM_ID __iomem *) \
685 ((card).base_addr+ID_ADDRESS))->signature)))
686
687 #ifndef SERIAL_XMIT_SIZE
688 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
689 #endif
690 #define WAKEUP_CHARS 256
691
692 #define STD_COM_FLAGS (0)
693
694 static struct tty_driver *cy_serial_driver;
695
696 #ifdef CONFIG_ISA
697 /* This is the address lookup table. The driver will probe for
698 Cyclom-Y/ISA boards at all addresses in here. If you want the
699 driver to probe addresses at a different address, add it to
700 this table. If the driver is probing some other board and
701 causing problems, remove the offending address from this table.
702 The cy_setup function extracts additional addresses from the
703 boot options line. The form is "cyclades=address,address..."
704 */
705
706 static unsigned int cy_isa_addresses[] = {
707 0xD0000,
708 0xD2000,
709 0xD4000,
710 0xD6000,
711 0xD8000,
712 0xDA000,
713 0xDC000,
714 0xDE000,
715 0, 0, 0, 0, 0, 0, 0, 0
716 };
717
718 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
719
720 #ifdef MODULE
721 static long maddr[NR_CARDS] = { 0, };
722 static int irq[NR_CARDS] = { 0, };
723
724 module_param_array(maddr, long, NULL, 0);
725 module_param_array(irq, int, NULL, 0);
726 #endif
727
728 #endif /* CONFIG_ISA */
729
730 /* This is the per-card data structure containing address, irq, number of
731 channels, etc. This driver supports a maximum of NR_CARDS cards.
732 */
733 static struct cyclades_card cy_card[NR_CARDS];
734
735 /* This is the per-channel data structure containing pointers, flags
736 and variables for the port. This driver supports a maximum of NR_PORTS.
737 */
738 static struct cyclades_port cy_port[NR_PORTS];
739
740 static int cy_next_channel; /* next minor available */
741
742 /*
743 * This is used to look up the divisor speeds and the timeouts
744 * We're normally limited to 15 distinct baud rates. The extra
745 * are accessed via settings in info->flags.
746 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
747 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
748 * HI VHI
749 * 20
750 */
751 static int baud_table[] = {
752 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
753 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
754 230400, 0
755 };
756
757 static char baud_co_25[] = { /* 25 MHz clock option table */
758 /* value => 00 01 02 03 04 */
759 /* divide by 8 32 128 512 2048 */
760 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
761 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
762 };
763
764 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
765 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
766 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
767 };
768
769 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
770 /* value => 00 01 02 03 04 */
771 /* divide by 8 32 128 512 2048 */
772 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
773 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
774 0x00
775 };
776
777 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
778 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
779 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
780 0x21
781 };
782
783 static char baud_cor3[] = { /* receive threshold */
784 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
785 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
786 0x07
787 };
788
789 /*
790 * The Cyclades driver implements HW flow control as any serial driver.
791 * The cyclades_port structure member rflow and the vector rflow_thr
792 * allows us to take advantage of a special feature in the CD1400 to avoid
793 * data loss even when the system interrupt latency is too high. These flags
794 * are to be used only with very special applications. Setting these flags
795 * requires the use of a special cable (DTR and RTS reversed). In the new
796 * CD1400-based boards (rev. 6.00 or later), there is no need for special
797 * cables.
798 */
799
800 static char rflow_thr[] = { /* rflow threshold */
801 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
802 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
803 0x0a
804 };
805
806 /* The Cyclom-Ye has placed the sequential chips in non-sequential
807 * address order. This look-up table overcomes that problem.
808 */
809 static int cy_chip_offset[] = { 0x0000,
810 0x0400,
811 0x0800,
812 0x0C00,
813 0x0200,
814 0x0600,
815 0x0A00,
816 0x0E00
817 };
818
819 /* PCI related definitions */
820
821 static unsigned short cy_pci_nboard;
822 static unsigned short cy_isa_nboard;
823 static unsigned short cy_nboard;
824 #ifdef CONFIG_PCI
825 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
826 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) }, /* PCI < 1Mb */
827 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) }, /* PCI > 1Mb */
828 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) }, /* 4Y PCI < 1Mb */
829 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) }, /* 4Y PCI > 1Mb */
830 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) }, /* 8Y PCI < 1Mb */
831 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) }, /* 8Y PCI > 1Mb */
832 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) }, /* Z PCI < 1Mb */
833 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) }, /* Z PCI > 1Mb */
834 { } /* end of table */
835 };
836 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
837 #endif
838
839 static void cy_start(struct tty_struct *);
840 static void set_line_char(struct cyclades_port *);
841 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
842 #ifdef CONFIG_ISA
843 static unsigned detect_isa_irq(void __iomem *);
844 #endif /* CONFIG_ISA */
845
846 static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
847
848 #ifndef CONFIG_CYZ_INTR
849 static void cyz_poll(unsigned long);
850
851 /* The Cyclades-Z polling cycle is defined by this variable */
852 static long cyz_polling_cycle = CZ_DEF_POLL;
853
854 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
855
856 #else /* CONFIG_CYZ_INTR */
857 static void cyz_rx_restart(unsigned long);
858 static struct timer_list cyz_rx_full_timer[NR_PORTS];
859 #endif /* CONFIG_CYZ_INTR */
860
861 static inline int serial_paranoia_check(struct cyclades_port *info,
862 char *name, const char *routine)
863 {
864 #ifdef SERIAL_PARANOIA_CHECK
865 if (!info) {
866 printk("cyc Warning: null cyclades_port for (%s) in %s\n",
867 name, routine);
868 return 1;
869 }
870
871 if ((long)info < (long)(&cy_port[0]) ||
872 (long)(&cy_port[NR_PORTS]) < (long)info) {
873 printk("cyc Warning: cyclades_port out of range for (%s) in "
874 "%s\n", name, routine);
875 return 1;
876 }
877
878 if (info->magic != CYCLADES_MAGIC) {
879 printk("cyc Warning: bad magic number for serial struct (%s) "
880 "in %s\n", name, routine);
881 return 1;
882 }
883 #endif
884 return 0;
885 } /* serial_paranoia_check */
886
887 /*
888 * This routine is used by the interrupt handler to schedule
889 * processing in the software interrupt portion of the driver
890 * (also known as the "bottom half"). This can be called any
891 * number of times for any channel without harm.
892 */
893 static inline void cy_sched_event(struct cyclades_port *info, int event)
894 {
895 info->event |= 1 << event; /* remember what kind of event and who */
896 schedule_work(&info->tqueue);
897 } /* cy_sched_event */
898
899 /*
900 * This routine is used to handle the "bottom half" processing for the
901 * serial driver, known also the "software interrupt" processing.
902 * This processing is done at the kernel interrupt level, after the
903 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
904 * is where time-consuming activities which can not be done in the
905 * interrupt driver proper are done; the interrupt driver schedules
906 * them using cy_sched_event(), and they get done here.
907 *
908 * This is done through one level of indirection--the task queue.
909 * When a hardware interrupt service routine wants service by the
910 * driver's bottom half, it enqueues the appropriate tq_struct (one
911 * per port) to the keventd work queue and sets a request flag
912 * that the work queue be processed.
913 *
914 * Although this may seem unwieldy, it gives the system a way to
915 * pass an argument (in this case the pointer to the cyclades_port
916 * structure) to the bottom half of the driver. Previous kernels
917 * had to poll every port to see if that port needed servicing.
918 */
919 static void
920 do_softint(struct work_struct *work)
921 {
922 struct cyclades_port *info =
923 container_of(work, struct cyclades_port, tqueue);
924 struct tty_struct *tty;
925
926 tty = info->tty;
927 if (!tty)
928 return;
929
930 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
931 tty_hangup(info->tty);
932 wake_up_interruptible(&info->open_wait);
933 info->flags &= ~ASYNC_NORMAL_ACTIVE;
934 }
935 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
936 wake_up_interruptible(&info->open_wait);
937 #ifdef CONFIG_CYZ_INTR
938 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
939 if (cyz_rx_full_timer[info->line].function == NULL) {
940 cyz_rx_full_timer[info->line].expires = jiffies + 1;
941 cyz_rx_full_timer[info->line].function = cyz_rx_restart;
942 cyz_rx_full_timer[info->line].data =
943 (unsigned long)info;
944 add_timer(&cyz_rx_full_timer[info->line]);
945 }
946 }
947 #endif
948 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
949 wake_up_interruptible(&info->delta_msr_wait);
950 tty_wakeup(tty);
951 #ifdef Z_WAKE
952 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
953 wake_up_interruptible(&info->shutdown_wait);
954 #endif
955 } /* do_softint */
956
957
958 /***********************************************************/
959 /********* Start of block of Cyclom-Y specific code ********/
960
961 /* This routine waits up to 1000 micro-seconds for the previous
962 command to the Cirrus chip to complete and then issues the
963 new command. An error is returned if the previous command
964 didn't finish within the time limit.
965
966 This function is only called from inside spinlock-protected code.
967 */
968 static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
969 {
970 unsigned int i;
971
972 /* Check to see that the previous command has completed */
973 for (i = 0; i < 100; i++) {
974 if (readb(base_addr + (CyCCR << index)) == 0) {
975 break;
976 }
977 udelay(10L);
978 }
979 /* if the CCR never cleared, the previous command
980 didn't finish within the "reasonable time" */
981 if (i == 100)
982 return -1;
983
984 /* Issue the new command */
985 cy_writeb(base_addr + (CyCCR << index), cmd);
986
987 return 0;
988 } /* cyy_issue_cmd */
989
990 #ifdef CONFIG_ISA
991 /* ISA interrupt detection code */
992 static unsigned detect_isa_irq(void __iomem * address)
993 {
994 int irq;
995 unsigned long irqs, flags;
996 int save_xir, save_car;
997 int index = 0; /* IRQ probing is only for ISA */
998
999 /* forget possible initially masked and pending IRQ */
1000 irq = probe_irq_off(probe_irq_on());
1001
1002 /* Clear interrupts on the board first */
1003 cy_writeb(address + (Cy_ClrIntr << index), 0);
1004 /* Cy_ClrIntr is 0x1800 */
1005
1006 irqs = probe_irq_on();
1007 /* Wait ... */
1008 udelay(5000L);
1009
1010 /* Enable the Tx interrupts on the CD1400 */
1011 local_irq_save(flags);
1012 cy_writeb(address + (CyCAR << index), 0);
1013 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
1014
1015 cy_writeb(address + (CyCAR << index), 0);
1016 cy_writeb(address + (CySRER << index),
1017 readb(address + (CySRER << index)) | CyTxRdy);
1018 local_irq_restore(flags);
1019
1020 /* Wait ... */
1021 udelay(5000L);
1022
1023 /* Check which interrupt is in use */
1024 irq = probe_irq_off(irqs);
1025
1026 /* Clean up */
1027 save_xir = (u_char) readb(address + (CyTIR << index));
1028 save_car = readb(address + (CyCAR << index));
1029 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1030 cy_writeb(address + (CySRER << index),
1031 readb(address + (CySRER << index)) & ~CyTxRdy);
1032 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1033 cy_writeb(address + (CyCAR << index), (save_car));
1034 cy_writeb(address + (Cy_ClrIntr << index), 0);
1035 /* Cy_ClrIntr is 0x1800 */
1036
1037 return (irq > 0) ? irq : 0;
1038 }
1039 #endif /* CONFIG_ISA */
1040
1041 static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
1042 void __iomem * base_addr, int status, int index)
1043 {
1044 struct cyclades_port *info;
1045 struct tty_struct *tty;
1046 int char_count;
1047 int i, j, len, mdm_change, mdm_status, outch;
1048 int save_xir, channel, save_car;
1049 char data;
1050
1051 if (status & CySRReceive) { /* reception interrupt */
1052 #ifdef CY_DEBUG_INTERRUPTS
1053 printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
1054 #endif
1055 /* determine the channel & change to that context */
1056 spin_lock(&cinfo->card_lock);
1057 save_xir = (u_char) readb(base_addr + (CyRIR << index));
1058 channel = (u_short) (save_xir & CyIRChannel);
1059 i = channel + chip * 4 + cinfo->first_line;
1060 info = &cy_port[i];
1061 info->last_active = jiffies;
1062 save_car = readb(base_addr + (CyCAR << index));
1063 cy_writeb(base_addr + (CyCAR << index), save_xir);
1064
1065 /* if there is nowhere to put the data, discard it */
1066 if (info->tty == 0) {
1067 j = (readb(base_addr + (CyRIVR << index)) &
1068 CyIVRMask);
1069 if (j == CyIVRRxEx) { /* exception */
1070 data = readb(base_addr + (CyRDSR << index));
1071 } else { /* normal character reception */
1072 char_count = readb(base_addr +
1073 (CyRDCR << index));
1074 while (char_count--) {
1075 data = readb(base_addr +
1076 (CyRDSR << index));
1077 }
1078 }
1079 } else { /* there is an open port for this data */
1080 tty = info->tty;
1081 j = (readb(base_addr + (CyRIVR << index)) &
1082 CyIVRMask);
1083 if (j == CyIVRRxEx) { /* exception */
1084 data = readb(base_addr + (CyRDSR << index));
1085
1086 /* For statistics only */
1087 if (data & CyBREAK)
1088 info->icount.brk++;
1089 else if (data & CyFRAME)
1090 info->icount.frame++;
1091 else if (data & CyPARITY)
1092 info->icount.parity++;
1093 else if (data & CyOVERRUN)
1094 info->icount.overrun++;
1095
1096 if (data & info->ignore_status_mask) {
1097 info->icount.rx++;
1098 return;
1099 }
1100 if (tty_buffer_request_room(tty, 1)) {
1101 if (data & info->read_status_mask) {
1102 if (data & CyBREAK) {
1103 tty_insert_flip_char(
1104 tty,
1105 readb(
1106 base_addr +
1107 (CyRDSR <<
1108 index)),
1109 TTY_BREAK);
1110 info->icount.rx++;
1111 if (info->flags &
1112 ASYNC_SAK) {
1113 do_SAK(tty);
1114 }
1115 } else if (data & CyFRAME) {
1116 tty_insert_flip_char(
1117 tty,
1118 readb(
1119 base_addr +
1120 (CyRDSR <<
1121 index)),
1122 TTY_FRAME);
1123 info->icount.rx++;
1124 info->idle_stats.
1125 frame_errs++;
1126 } else if (data & CyPARITY) {
1127 /* Pieces of seven... */
1128 tty_insert_flip_char(
1129 tty,
1130 readb(
1131 base_addr +
1132 (CyRDSR <<
1133 index)),
1134 TTY_PARITY);
1135 info->icount.rx++;
1136 info->idle_stats.
1137 parity_errs++;
1138 } else if (data & CyOVERRUN) {
1139 tty_insert_flip_char(
1140 tty, 0,
1141 TTY_OVERRUN);
1142 info->icount.rx++;
1143 /* If the flip buffer itself is
1144 overflowing, we still lose
1145 the next incoming character.
1146 */
1147 tty_insert_flip_char(
1148 tty,
1149 readb(
1150 base_addr +
1151 (CyRDSR <<
1152 index)),
1153 TTY_FRAME);
1154 info->icount.rx++;
1155 info->idle_stats.
1156 overruns++;
1157 /* These two conditions may imply */
1158 /* a normal read should be done. */
1159 /* }else if(data & CyTIMEOUT){ */
1160 /* }else if(data & CySPECHAR){ */
1161 } else {
1162 tty_insert_flip_char(
1163 tty, 0,
1164 TTY_NORMAL);
1165 info->icount.rx++;
1166 }
1167 } else {
1168 tty_insert_flip_char(tty, 0,
1169 TTY_NORMAL);
1170 info->icount.rx++;
1171 }
1172 } else {
1173 /* there was a software buffer
1174 overrun and nothing could be
1175 done about it!!! */
1176 info->icount.buf_overrun++;
1177 info->idle_stats.overruns++;
1178 }
1179 } else { /* normal character reception */
1180 /* load # chars available from the chip */
1181 char_count = readb(base_addr +
1182 (CyRDCR << index));
1183
1184 #ifdef CY_ENABLE_MONITORING
1185 ++info->mon.int_count;
1186 info->mon.char_count += char_count;
1187 if (char_count > info->mon.char_max)
1188 info->mon.char_max = char_count;
1189 info->mon.char_last = char_count;
1190 #endif
1191 len = tty_buffer_request_room(tty, char_count);
1192 while (len--) {
1193 data = readb(base_addr +
1194 (CyRDSR << index));
1195 tty_insert_flip_char(tty, data,
1196 TTY_NORMAL);
1197 info->idle_stats.recv_bytes++;
1198 info->icount.rx++;
1199 #ifdef CY_16Y_HACK
1200 udelay(10L);
1201 #endif
1202 }
1203 info->idle_stats.recv_idle = jiffies;
1204 }
1205 tty_schedule_flip(tty);
1206 }
1207 /* end of service */
1208 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1209 cy_writeb(base_addr + (CyCAR << index), (save_car));
1210 spin_unlock(&cinfo->card_lock);
1211 }
1212
1213 if (status & CySRTransmit) { /* transmission interrupt */
1214 /* Since we only get here when the transmit buffer
1215 is empty, we know we can always stuff a dozen
1216 characters. */
1217 #ifdef CY_DEBUG_INTERRUPTS
1218 printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
1219 #endif
1220
1221 /* determine the channel & change to that context */
1222 spin_lock(&cinfo->card_lock);
1223 save_xir = (u_char) readb(base_addr + (CyTIR << index));
1224 channel = (u_short) (save_xir & CyIRChannel);
1225 i = channel + chip * 4 + cinfo->first_line;
1226 save_car = readb(base_addr + (CyCAR << index));
1227 cy_writeb(base_addr + (CyCAR << index), save_xir);
1228
1229 /* validate the port# (as configured and open) */
1230 if ((i < 0) || (NR_PORTS <= i)) {
1231 cy_writeb(base_addr + (CySRER << index),
1232 readb(base_addr + (CySRER << index)) &
1233 ~CyTxRdy);
1234 goto txend;
1235 }
1236 info = &cy_port[i];
1237 info->last_active = jiffies;
1238 if (info->tty == 0) {
1239 cy_writeb(base_addr + (CySRER << index),
1240 readb(base_addr + (CySRER << index)) &
1241 ~CyTxRdy);
1242 goto txdone;
1243 }
1244
1245 /* load the on-chip space for outbound data */
1246 char_count = info->xmit_fifo_size;
1247
1248 if (info->x_char) { /* send special char */
1249 outch = info->x_char;
1250 cy_writeb(base_addr + (CyTDR << index), outch);
1251 char_count--;
1252 info->icount.tx++;
1253 info->x_char = 0;
1254 }
1255
1256 if (info->breakon || info->breakoff) {
1257 if (info->breakon) {
1258 cy_writeb(base_addr + (CyTDR << index), 0);
1259 cy_writeb(base_addr + (CyTDR << index), 0x81);
1260 info->breakon = 0;
1261 char_count -= 2;
1262 }
1263 if (info->breakoff) {
1264 cy_writeb(base_addr + (CyTDR << index), 0);
1265 cy_writeb(base_addr + (CyTDR << index), 0x83);
1266 info->breakoff = 0;
1267 char_count -= 2;
1268 }
1269 }
1270
1271 while (char_count-- > 0) {
1272 if (!info->xmit_cnt) {
1273 if (readb(base_addr + (CySRER << index)) &
1274 CyTxMpty) {
1275 cy_writeb(base_addr + (CySRER << index),
1276 readb(base_addr +
1277 (CySRER << index)) &
1278 ~CyTxMpty);
1279 } else {
1280 cy_writeb(base_addr + (CySRER << index),
1281 (readb(base_addr +
1282 (CySRER << index)) &
1283 ~CyTxRdy) | CyTxMpty);
1284 }
1285 goto txdone;
1286 }
1287 if (info->xmit_buf == 0) {
1288 cy_writeb(base_addr + (CySRER << index),
1289 readb(base_addr + (CySRER << index)) &
1290 ~CyTxRdy);
1291 goto txdone;
1292 }
1293 if (info->tty->stopped || info->tty->hw_stopped) {
1294 cy_writeb(base_addr + (CySRER << index),
1295 readb(base_addr + (CySRER << index)) &
1296 ~CyTxRdy);
1297 goto txdone;
1298 }
1299 /* Because the Embedded Transmit Commands have
1300 been enabled, we must check to see if the
1301 escape character, NULL, is being sent. If it
1302 is, we must ensure that there is room for it
1303 to be doubled in the output stream. Therefore
1304 we no longer advance the pointer when the
1305 character is fetched, but rather wait until
1306 after the check for a NULL output character.
1307 This is necessary because there may not be
1308 room for the two chars needed to send a NULL.)
1309 */
1310 outch = info->xmit_buf[info->xmit_tail];
1311 if (outch) {
1312 info->xmit_cnt--;
1313 info->xmit_tail = (info->xmit_tail + 1) &
1314 (SERIAL_XMIT_SIZE - 1);
1315 cy_writeb(base_addr + (CyTDR << index), outch);
1316 info->icount.tx++;
1317 } else {
1318 if (char_count > 1) {
1319 info->xmit_cnt--;
1320 info->xmit_tail = (info->xmit_tail + 1)&
1321 (SERIAL_XMIT_SIZE - 1);
1322 cy_writeb(base_addr + (CyTDR << index),
1323 outch);
1324 cy_writeb(base_addr + (CyTDR << index),
1325 0);
1326 info->icount.tx++;
1327 char_count--;
1328 } else {
1329 }
1330 }
1331 }
1332
1333 txdone:
1334 if (info->xmit_cnt < WAKEUP_CHARS) {
1335 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1336 }
1337 txend:
1338 /* end of service */
1339 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1340 cy_writeb(base_addr + (CyCAR << index), (save_car));
1341 spin_unlock(&cinfo->card_lock);
1342 }
1343
1344 if (status & CySRModem) { /* modem interrupt */
1345
1346 /* determine the channel & change to that context */
1347 spin_lock(&cinfo->card_lock);
1348 save_xir = (u_char) readb(base_addr + (CyMIR << index));
1349 channel = (u_short) (save_xir & CyIRChannel);
1350 info = &cy_port[channel + chip * 4 + cinfo->first_line];
1351 info->last_active = jiffies;
1352 save_car = readb(base_addr + (CyCAR << index));
1353 cy_writeb(base_addr + (CyCAR << index), save_xir);
1354
1355 mdm_change = readb(base_addr + (CyMISR << index));
1356 mdm_status = readb(base_addr + (CyMSVR1 << index));
1357
1358 if (info->tty == 0) { /* no place for data, ignore it */
1359 ;
1360 } else {
1361 if (mdm_change & CyANY_DELTA) {
1362 /* For statistics only */
1363 if (mdm_change & CyDCD)
1364 info->icount.dcd++;
1365 if (mdm_change & CyCTS)
1366 info->icount.cts++;
1367 if (mdm_change & CyDSR)
1368 info->icount.dsr++;
1369 if (mdm_change & CyRI)
1370 info->icount.rng++;
1371
1372 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1373 }
1374
1375 if ((mdm_change & CyDCD) &&
1376 (info->flags & ASYNC_CHECK_CD)) {
1377 if (mdm_status & CyDCD) {
1378 cy_sched_event(info,
1379 Cy_EVENT_OPEN_WAKEUP);
1380 } else {
1381 cy_sched_event(info, Cy_EVENT_HANGUP);
1382 }
1383 }
1384 if ((mdm_change & CyCTS) &&
1385 (info->flags & ASYNC_CTS_FLOW)) {
1386 if (info->tty->hw_stopped) {
1387 if (mdm_status & CyCTS) {
1388 /* cy_start isn't used
1389 because... !!! */
1390 info->tty->hw_stopped = 0;
1391 cy_writeb(base_addr +
1392 (CySRER << index),
1393 readb(base_addr +
1394 (CySRER <<
1395 index))|
1396 CyTxRdy);
1397 cy_sched_event(info,
1398 Cy_EVENT_WRITE_WAKEUP);
1399 }
1400 } else {
1401 if (!(mdm_status & CyCTS)) {
1402 /* cy_stop isn't used
1403 because ... !!! */
1404 info->tty->hw_stopped = 1;
1405 cy_writeb(base_addr +
1406 (CySRER << index),
1407 readb(base_addr +
1408 (CySRER <<
1409 index)) &
1410 ~CyTxRdy);
1411 }
1412 }
1413 }
1414 if (mdm_change & CyDSR) {
1415 }
1416 if (mdm_change & CyRI) {
1417 }
1418 }
1419 /* end of service */
1420 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1421 cy_writeb(base_addr + (CyCAR << index), save_car);
1422 spin_unlock(&cinfo->card_lock);
1423 }
1424 }
1425
1426 /* The real interrupt service routine is called
1427 whenever the card wants its hand held--chars
1428 received, out buffer empty, modem change, etc.
1429 */
1430 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1431 {
1432 int status;
1433 struct cyclades_card *cinfo;
1434 void __iomem *base_addr, *card_base_addr;
1435 int chip;
1436 int index;
1437 int too_many;
1438 int had_work;
1439
1440 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1441 #ifdef CY_DEBUG_INTERRUPTS
1442 printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
1443 #endif
1444 return IRQ_NONE; /* spurious interrupt */
1445 }
1446
1447 card_base_addr = cinfo->base_addr;
1448 index = cinfo->bus_index;
1449
1450 /* This loop checks all chips in the card. Make a note whenever
1451 _any_ chip had some work to do, as this is considered an
1452 indication that there will be more to do. Only when no chip
1453 has any work does this outermost loop exit.
1454 */
1455 do {
1456 had_work = 0;
1457 for (chip = 0; chip < cinfo->num_chips; chip++) {
1458 base_addr = cinfo->base_addr +
1459 (cy_chip_offset[chip] << index);
1460 too_many = 0;
1461 while ((status = readb(base_addr +
1462 (CySVRR << index))) != 0x00) {
1463 had_work++;
1464 /* The purpose of the following test is to ensure that
1465 no chip can monopolize the driver. This forces the
1466 chips to be checked in a round-robin fashion (after
1467 draining each of a bunch (1000) of characters).
1468 */
1469 if (1000 < too_many++) {
1470 break;
1471 }
1472 cyy_intr_chip(cinfo, chip, base_addr, status,
1473 index);
1474 }
1475 }
1476 } while (had_work);
1477
1478 /* clear interrupts */
1479 spin_lock(&cinfo->card_lock);
1480 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1481 /* Cy_ClrIntr is 0x1800 */
1482 spin_unlock(&cinfo->card_lock);
1483 return IRQ_HANDLED;
1484 } /* cyy_interrupt */
1485
1486 /***********************************************************/
1487 /********* End of block of Cyclom-Y specific code **********/
1488 /******** Start of block of Cyclades-Z specific code *********/
1489 /***********************************************************/
1490
1491 static int
1492 cyz_fetch_msg(struct cyclades_card *cinfo,
1493 __u32 * channel, __u8 * cmd, __u32 * param)
1494 {
1495 struct FIRM_ID __iomem *firm_id;
1496 struct ZFW_CTRL __iomem *zfw_ctrl;
1497 struct BOARD_CTRL __iomem *board_ctrl;
1498 unsigned long loc_doorbell;
1499
1500 firm_id = cinfo->base_addr + ID_ADDRESS;
1501 if (!ISZLOADED(*cinfo)) {
1502 return -1;
1503 }
1504 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1505 board_ctrl = &zfw_ctrl->board_ctrl;
1506
1507 loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1508 (cinfo->ctl_addr))->loc_doorbell);
1509 if (loc_doorbell) {
1510 *cmd = (char)(0xff & loc_doorbell);
1511 *channel = readl(&board_ctrl->fwcmd_channel);
1512 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1513 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1514 loc_doorbell, 0xffffffff);
1515 return 1;
1516 }
1517 return 0;
1518 } /* cyz_fetch_msg */
1519
1520 static int
1521 cyz_issue_cmd(struct cyclades_card *cinfo,
1522 __u32 channel, __u8 cmd, __u32 param)
1523 {
1524 struct FIRM_ID __iomem *firm_id;
1525 struct ZFW_CTRL __iomem *zfw_ctrl;
1526 struct BOARD_CTRL __iomem *board_ctrl;
1527 __u32 __iomem *pci_doorbell;
1528 int index;
1529
1530 firm_id = cinfo->base_addr + ID_ADDRESS;
1531 if (!ISZLOADED(*cinfo)) {
1532 return -1;
1533 }
1534 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1535 board_ctrl = &zfw_ctrl->board_ctrl;
1536
1537 index = 0;
1538 pci_doorbell =
1539 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1540 while ((readl(pci_doorbell) & 0xff) != 0) {
1541 if (index++ == 1000) {
1542 return (int)(readl(pci_doorbell) & 0xff);
1543 }
1544 udelay(50L);
1545 }
1546 cy_writel(&board_ctrl->hcmd_channel, channel);
1547 cy_writel(&board_ctrl->hcmd_param, param);
1548 cy_writel(pci_doorbell, (long)cmd);
1549
1550 return 0;
1551 } /* cyz_issue_cmd */
1552
1553 static void
1554 cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1555 struct BUF_CTRL __iomem *buf_ctrl)
1556 {
1557 struct cyclades_card *cinfo = &cy_card[info->card];
1558 struct tty_struct *tty = info->tty;
1559 int char_count;
1560 int len;
1561 #ifdef BLOCKMOVE
1562 int small_count;
1563 #else
1564 char data;
1565 #endif
1566 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1567
1568 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1569 rx_put = readl(&buf_ctrl->rx_put);
1570 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1571 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1572 if (rx_put >= rx_get)
1573 char_count = rx_put - rx_get;
1574 else
1575 char_count = rx_put - rx_get + rx_bufsize;
1576
1577 if (char_count) {
1578 info->last_active = jiffies;
1579 info->jiffies[1] = jiffies;
1580
1581 #ifdef CY_ENABLE_MONITORING
1582 info->mon.int_count++;
1583 info->mon.char_count += char_count;
1584 if (char_count > info->mon.char_max)
1585 info->mon.char_max = char_count;
1586 info->mon.char_last = char_count;
1587 #endif
1588 if (tty == 0) {
1589 /* flush received characters */
1590 new_rx_get = (new_rx_get + char_count) &
1591 (rx_bufsize - 1);
1592 info->rflush_count++;
1593 } else {
1594 #ifdef BLOCKMOVE
1595 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1596 for performance, but because of buffer boundaries, there
1597 may be several steps to the operation */
1598 while (0 < (small_count = min_t(unsigned int,
1599 rx_bufsize - new_rx_get,
1600 min_t(unsigned int, TTY_FLIPBUF_SIZE -
1601 tty->flip.count, char_count)))){
1602 memcpy_fromio(tty->flip.char_buf_ptr,
1603 (char *)(cinfo->base_addr + rx_bufaddr +
1604 new_rx_get),
1605 small_count);
1606
1607 tty->flip.char_buf_ptr += small_count;
1608 memset(tty->flip.flag_buf_ptr, TTY_NORMAL,
1609 small_count);
1610 tty->flip.flag_buf_ptr += small_count;
1611 new_rx_get = (new_rx_get + small_count) &
1612 (rx_bufsize - 1);
1613 char_count -= small_count;
1614 info->icount.rx += small_count;
1615 info->idle_stats.recv_bytes += small_count;
1616 tty->flip.count += small_count;
1617 }
1618 #else
1619 len = tty_buffer_request_room(tty, char_count);
1620 while (len--) {
1621 data = readb(cinfo->base_addr + rx_bufaddr +
1622 new_rx_get);
1623 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1624 tty_insert_flip_char(tty, data, TTY_NORMAL);
1625 info->idle_stats.recv_bytes++;
1626 info->icount.rx++;
1627 }
1628 #endif
1629 #ifdef CONFIG_CYZ_INTR
1630 /* Recalculate the number of chars in the RX buffer and issue
1631 a cmd in case it's higher than the RX high water mark */
1632 rx_put = readl(&buf_ctrl->rx_put);
1633 if (rx_put >= rx_get)
1634 char_count = rx_put - rx_get;
1635 else
1636 char_count = rx_put - rx_get + rx_bufsize;
1637 if (char_count >= (int)readl(&buf_ctrl->rx_threshold)) {
1638 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1639 }
1640 #endif
1641 info->idle_stats.recv_idle = jiffies;
1642 tty_schedule_flip(tty);
1643 }
1644 /* Update rx_get */
1645 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1646 }
1647 }
1648
1649 static void
1650 cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1651 struct BUF_CTRL __iomem *buf_ctrl)
1652 {
1653 struct cyclades_card *cinfo = &cy_card[info->card];
1654 struct tty_struct *tty = info->tty;
1655 char data;
1656 int char_count;
1657 #ifdef BLOCKMOVE
1658 int small_count;
1659 #endif
1660 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1661
1662 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1663 return;
1664
1665 tx_get = readl(&buf_ctrl->tx_get);
1666 tx_put = readl(&buf_ctrl->tx_put);
1667 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1668 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1669 if (tx_put >= tx_get)
1670 char_count = tx_get - tx_put - 1 + tx_bufsize;
1671 else
1672 char_count = tx_get - tx_put - 1;
1673
1674 if (char_count) {
1675
1676 if (tty == 0) {
1677 goto ztxdone;
1678 }
1679
1680 if (info->x_char) { /* send special char */
1681 data = info->x_char;
1682
1683 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1684 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1685 info->x_char = 0;
1686 char_count--;
1687 info->icount.tx++;
1688 info->last_active = jiffies;
1689 info->jiffies[2] = jiffies;
1690 }
1691 #ifdef BLOCKMOVE
1692 while (0 < (small_count = min_t(unsigned int,
1693 tx_bufsize - tx_put, min_t(unsigned int,
1694 (SERIAL_XMIT_SIZE - info->xmit_tail),
1695 min_t(unsigned int, info->xmit_cnt,
1696 char_count))))) {
1697
1698 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1699 tx_put),
1700 &info->xmit_buf[info->xmit_tail],
1701 small_count);
1702
1703 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1704 char_count -= small_count;
1705 info->icount.tx += small_count;
1706 info->xmit_cnt -= small_count;
1707 info->xmit_tail = (info->xmit_tail + small_count) &
1708 (SERIAL_XMIT_SIZE - 1);
1709 info->last_active = jiffies;
1710 info->jiffies[2] = jiffies;
1711 }
1712 #else
1713 while (info->xmit_cnt && char_count) {
1714 data = info->xmit_buf[info->xmit_tail];
1715 info->xmit_cnt--;
1716 info->xmit_tail = (info->xmit_tail + 1) &
1717 (SERIAL_XMIT_SIZE - 1);
1718
1719 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1720 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1721 char_count--;
1722 info->icount.tx++;
1723 info->last_active = jiffies;
1724 info->jiffies[2] = jiffies;
1725 }
1726 #endif
1727 ztxdone:
1728 if (info->xmit_cnt < WAKEUP_CHARS) {
1729 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1730 }
1731 /* Update tx_put */
1732 cy_writel(&buf_ctrl->tx_put, tx_put);
1733 }
1734 }
1735
1736 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1737 {
1738 struct tty_struct *tty;
1739 struct cyclades_port *info;
1740 static struct FIRM_ID __iomem *firm_id;
1741 static struct ZFW_CTRL __iomem *zfw_ctrl;
1742 static struct BOARD_CTRL __iomem *board_ctrl;
1743 static struct CH_CTRL __iomem *ch_ctrl;
1744 static struct BUF_CTRL __iomem *buf_ctrl;
1745 __u32 channel;
1746 __u8 cmd;
1747 __u32 param;
1748 __u32 hw_ver, fw_ver;
1749 int special_count;
1750 int delta_count;
1751
1752 firm_id = cinfo->base_addr + ID_ADDRESS;
1753 zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1754 board_ctrl = &zfw_ctrl->board_ctrl;
1755 fw_ver = readl(&board_ctrl->fw_version);
1756 hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1757 mail_box_0);
1758
1759 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1760 special_count = 0;
1761 delta_count = 0;
1762 info = &cy_port[channel + cinfo->first_line];
1763 if ((tty = info->tty) == 0) {
1764 continue;
1765 }
1766 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1767 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1768
1769 switch (cmd) {
1770 case C_CM_PR_ERROR:
1771 tty_insert_flip_char(tty, 0, TTY_PARITY);
1772 info->icount.rx++;
1773 special_count++;
1774 break;
1775 case C_CM_FR_ERROR:
1776 tty_insert_flip_char(tty, 0, TTY_FRAME);
1777 info->icount.rx++;
1778 special_count++;
1779 break;
1780 case C_CM_RXBRK:
1781 tty_insert_flip_char(tty, 0, TTY_BREAK);
1782 info->icount.rx++;
1783 special_count++;
1784 break;
1785 case C_CM_MDCD:
1786 info->icount.dcd++;
1787 delta_count++;
1788 if (info->flags & ASYNC_CHECK_CD) {
1789 if ((fw_ver > 241 ? ((u_long) param) :
1790 readl(&ch_ctrl->rs_status)) &
1791 C_RS_DCD) {
1792 cy_sched_event(info,
1793 Cy_EVENT_OPEN_WAKEUP);
1794 } else {
1795 cy_sched_event(info, Cy_EVENT_HANGUP);
1796 }
1797 }
1798 break;
1799 case C_CM_MCTS:
1800 info->icount.cts++;
1801 delta_count++;
1802 break;
1803 case C_CM_MRI:
1804 info->icount.rng++;
1805 delta_count++;
1806 break;
1807 case C_CM_MDSR:
1808 info->icount.dsr++;
1809 delta_count++;
1810 break;
1811 #ifdef Z_WAKE
1812 case C_CM_IOCTLW:
1813 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1814 break;
1815 #endif
1816 #ifdef CONFIG_CYZ_INTR
1817 case C_CM_RXHIWM:
1818 case C_CM_RXNNDT:
1819 case C_CM_INTBACK2:
1820 /* Reception Interrupt */
1821 #ifdef CY_DEBUG_INTERRUPTS
1822 printk("cyz_interrupt: rcvd intr, card %d, "
1823 "port %ld\n\r", info->card, channel);
1824 #endif
1825 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1826 break;
1827 case C_CM_TXBEMPTY:
1828 case C_CM_TXLOWWM:
1829 case C_CM_INTBACK:
1830 /* Transmission Interrupt */
1831 #ifdef CY_DEBUG_INTERRUPTS
1832 printk("cyz_interrupt: xmit intr, card %d, "
1833 "port %ld\n\r", info->card, channel);
1834 #endif
1835 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1836 break;
1837 #endif /* CONFIG_CYZ_INTR */
1838 case C_CM_FATAL:
1839 /* should do something with this !!! */
1840 break;
1841 default:
1842 break;
1843 }
1844 if (delta_count)
1845 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1846 if (special_count)
1847 tty_schedule_flip(tty);
1848 }
1849 }
1850
1851 #ifdef CONFIG_CYZ_INTR
1852 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1853 {
1854 struct cyclades_card *cinfo;
1855
1856 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1857 #ifdef CY_DEBUG_INTERRUPTS
1858 printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
1859 #endif
1860 return IRQ_NONE; /* spurious interrupt */
1861 }
1862
1863 if (!ISZLOADED(*cinfo)) {
1864 #ifdef CY_DEBUG_INTERRUPTS
1865 printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq);
1866 #endif
1867 return IRQ_NONE;
1868 }
1869
1870 /* Handle the interrupts */
1871 cyz_handle_cmd(cinfo);
1872
1873 return IRQ_HANDLED;
1874 } /* cyz_interrupt */
1875
1876 static void cyz_rx_restart(unsigned long arg)
1877 {
1878 struct cyclades_port *info = (struct cyclades_port *)arg;
1879 int retval;
1880 int card = info->card;
1881 __u32 channel = (info->line) - (cy_card[card].first_line);
1882 unsigned long flags;
1883
1884 CY_LOCK(info, flags);
1885 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
1886 if (retval != 0) {
1887 printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1888 info->line, retval);
1889 }
1890 cyz_rx_full_timer[info->line].function = NULL;
1891 CY_UNLOCK(info, flags);
1892 }
1893
1894 #else /* CONFIG_CYZ_INTR */
1895
1896 static void cyz_poll(unsigned long arg)
1897 {
1898 struct cyclades_card *cinfo;
1899 struct cyclades_port *info;
1900 struct tty_struct *tty;
1901 static struct FIRM_ID *firm_id;
1902 static struct ZFW_CTRL *zfw_ctrl;
1903 static struct BOARD_CTRL *board_ctrl;
1904 static struct CH_CTRL *ch_ctrl;
1905 static struct BUF_CTRL *buf_ctrl;
1906 unsigned long expires = jiffies + HZ;
1907 int card, port;
1908
1909 for (card = 0; card < NR_CARDS; card++) {
1910 cinfo = &cy_card[card];
1911
1912 if (!IS_CYC_Z(*cinfo))
1913 continue;
1914 if (!ISZLOADED(*cinfo))
1915 continue;
1916
1917 firm_id = cinfo->base_addr + ID_ADDRESS;
1918 zfw_ctrl = cinfo->base_addr +
1919 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1920 board_ctrl = &(zfw_ctrl->board_ctrl);
1921
1922 /* Skip first polling cycle to avoid racing conditions with the FW */
1923 if (!cinfo->intr_enabled) {
1924 cinfo->nports = (int)readl(&board_ctrl->n_channel);
1925 cinfo->intr_enabled = 1;
1926 continue;
1927 }
1928
1929 cyz_handle_cmd(cinfo);
1930
1931 for (port = 0; port < cinfo->nports; port++) {
1932 info = &cy_port[port + cinfo->first_line];
1933 tty = info->tty;
1934 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1935 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1936
1937 if (!info->throttle)
1938 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1939 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1940 }
1941 /* poll every 'cyz_polling_cycle' period */
1942 expires = jiffies + cyz_polling_cycle;
1943 }
1944 mod_timer(&cyz_timerlist, expires);
1945 } /* cyz_poll */
1946
1947 #endif /* CONFIG_CYZ_INTR */
1948
1949 /********** End of block of Cyclades-Z specific code *********/
1950 /***********************************************************/
1951
1952 /* This is called whenever a port becomes active;
1953 interrupts are enabled and DTR & RTS are turned on.
1954 */
1955 static int startup(struct cyclades_port *info)
1956 {
1957 unsigned long flags;
1958 int retval = 0;
1959 void __iomem *base_addr;
1960 int card, chip, channel, index;
1961 unsigned long page;
1962
1963 card = info->card;
1964 channel = (info->line) - (cy_card[card].first_line);
1965
1966 page = get_zeroed_page(GFP_KERNEL);
1967 if (!page)
1968 return -ENOMEM;
1969
1970 CY_LOCK(info, flags);
1971
1972 if (info->flags & ASYNC_INITIALIZED) {
1973 free_page(page);
1974 goto errout;
1975 }
1976
1977 if (!info->type) {
1978 if (info->tty) {
1979 set_bit(TTY_IO_ERROR, &info->tty->flags);
1980 }
1981 free_page(page);
1982 goto errout;
1983 }
1984
1985 if (info->xmit_buf)
1986 free_page(page);
1987 else
1988 info->xmit_buf = (unsigned char *)page;
1989
1990 CY_UNLOCK(info, flags);
1991
1992 set_line_char(info);
1993
1994 if (!IS_CYC_Z(cy_card[card])) {
1995 chip = channel >> 2;
1996 channel &= 0x03;
1997 index = cy_card[card].bus_index;
1998 base_addr = cy_card[card].base_addr +
1999 (cy_chip_offset[chip] << index);
2000
2001 #ifdef CY_DEBUG_OPEN
2002 printk("cyc startup card %d, chip %d, channel %d, "
2003 "base_addr %lx\n",
2004 card, chip, channel, (long)base_addr);
2005 /**/
2006 #endif
2007 CY_LOCK(info, flags);
2008
2009 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2010
2011 cy_writeb(base_addr + (CyRTPR << index),
2012 (info->default_timeout ? info->default_timeout : 0x02));
2013 /* 10ms rx timeout */
2014
2015 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
2016 index);
2017
2018 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2019 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
2020 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
2021
2022 #ifdef CY_DEBUG_DTR
2023 printk("cyc:startup raising DTR\n");
2024 printk(" status: 0x%x, 0x%x\n",
2025 readb(base_addr + (CyMSVR1 << index)),
2026 readb(base_addr + (CyMSVR2 << index)));
2027 #endif
2028
2029 cy_writeb(base_addr + (CySRER << index),
2030 readb(base_addr + (CySRER << index)) | CyRxData);
2031 info->flags |= ASYNC_INITIALIZED;
2032
2033 if (info->tty) {
2034 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2035 }
2036 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2037 info->breakon = info->breakoff = 0;
2038 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2039 info->idle_stats.in_use =
2040 info->idle_stats.recv_idle =
2041 info->idle_stats.xmit_idle = jiffies;
2042
2043 CY_UNLOCK(info, flags);
2044
2045 } else {
2046 struct FIRM_ID __iomem *firm_id;
2047 struct ZFW_CTRL __iomem *zfw_ctrl;
2048 struct BOARD_CTRL __iomem *board_ctrl;
2049 struct CH_CTRL __iomem *ch_ctrl;
2050 int retval;
2051
2052 base_addr = cy_card[card].base_addr;
2053
2054 firm_id = base_addr + ID_ADDRESS;
2055 if (!ISZLOADED(cy_card[card])) {
2056 return -ENODEV;
2057 }
2058
2059 zfw_ctrl = cy_card[card].base_addr +
2060 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2061 board_ctrl = &zfw_ctrl->board_ctrl;
2062 ch_ctrl = zfw_ctrl->ch_ctrl;
2063
2064 #ifdef CY_DEBUG_OPEN
2065 printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
2066 card, channel, (long)base_addr);
2067 /**/
2068 #endif
2069 CY_LOCK(info, flags);
2070
2071 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2072 #ifdef Z_WAKE
2073 #ifdef CONFIG_CYZ_INTR
2074 cy_writel(&ch_ctrl[channel].intr_enable,
2075 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2076 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
2077 #else
2078 cy_writel(&ch_ctrl[channel].intr_enable,
2079 C_IN_IOCTLW | C_IN_MDCD);
2080 #endif /* CONFIG_CYZ_INTR */
2081 #else
2082 #ifdef CONFIG_CYZ_INTR
2083 cy_writel(&ch_ctrl[channel].intr_enable,
2084 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2085 C_IN_RXNNDT | C_IN_MDCD);
2086 #else
2087 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2088 #endif /* CONFIG_CYZ_INTR */
2089 #endif /* Z_WAKE */
2090
2091 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
2092 if (retval != 0) {
2093 printk("cyc:startup(1) retval on ttyC%d was %x\n",
2094 info->line, retval);
2095 }
2096
2097 /* Flush RX buffers before raising DTR and RTS */
2098 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX,
2099 0L);
2100 if (retval != 0) {
2101 printk("cyc:startup(2) retval on ttyC%d was %x\n",
2102 info->line, retval);
2103 }
2104
2105 /* set timeout !!! */
2106 /* set RTS and DTR !!! */
2107 cy_writel(&ch_ctrl[channel].rs_control,
2108 readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2109 C_RS_DTR);
2110 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2111 C_CM_IOCTLM, 0L);
2112 if (retval != 0) {
2113 printk("cyc:startup(3) retval on ttyC%d was %x\n",
2114 info->line, retval);
2115 }
2116 #ifdef CY_DEBUG_DTR
2117 printk("cyc:startup raising Z DTR\n");
2118 #endif
2119
2120 /* enable send, recv, modem !!! */
2121
2122 info->flags |= ASYNC_INITIALIZED;
2123 if (info->tty) {
2124 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2125 }
2126 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2127 info->breakon = info->breakoff = 0;
2128 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2129 info->idle_stats.in_use =
2130 info->idle_stats.recv_idle =
2131 info->idle_stats.xmit_idle = jiffies;
2132
2133 CY_UNLOCK(info, flags);
2134 }
2135
2136 #ifdef CY_DEBUG_OPEN
2137 printk(" cyc startup done\n");
2138 #endif
2139 return 0;
2140
2141 errout:
2142 CY_UNLOCK(info, flags);
2143 return retval;
2144 } /* startup */
2145
2146 static void start_xmit(struct cyclades_port *info)
2147 {
2148 unsigned long flags;
2149 void __iomem *base_addr;
2150 int card, chip, channel, index;
2151
2152 card = info->card;
2153 channel = (info->line) - (cy_card[card].first_line);
2154 if (!IS_CYC_Z(cy_card[card])) {
2155 chip = channel >> 2;
2156 channel &= 0x03;
2157 index = cy_card[card].bus_index;
2158 base_addr = cy_card[card].base_addr +
2159 (cy_chip_offset[chip] << index);
2160
2161 CY_LOCK(info, flags);
2162 cy_writeb(base_addr + (CyCAR << index), channel);
2163 cy_writeb(base_addr + (CySRER << index),
2164 readb(base_addr + (CySRER << index)) | CyTxRdy);
2165 CY_UNLOCK(info, flags);
2166 } else {
2167 #ifdef CONFIG_CYZ_INTR
2168 int retval;
2169
2170 CY_LOCK(info, flags);
2171 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK,
2172 0L);
2173 if (retval != 0) {
2174 printk("cyc:start_xmit retval on ttyC%d was %x\n",
2175 info->line, retval);
2176 }
2177 CY_UNLOCK(info, flags);
2178 #else /* CONFIG_CYZ_INTR */
2179 /* Don't have to do anything at this time */
2180 #endif /* CONFIG_CYZ_INTR */
2181 }
2182 } /* start_xmit */
2183
2184 /*
2185 * This routine shuts down a serial port; interrupts are disabled,
2186 * and DTR is dropped if the hangup on close termio flag is on.
2187 */
2188 static void shutdown(struct cyclades_port *info)
2189 {
2190 unsigned long flags;
2191 void __iomem *base_addr;
2192 int card, chip, channel, index;
2193
2194 if (!(info->flags & ASYNC_INITIALIZED)) {
2195 return;
2196 }
2197
2198 card = info->card;
2199 channel = info->line - cy_card[card].first_line;
2200 if (!IS_CYC_Z(cy_card[card])) {
2201 chip = channel >> 2;
2202 channel &= 0x03;
2203 index = cy_card[card].bus_index;
2204 base_addr = cy_card[card].base_addr +
2205 (cy_chip_offset[chip] << index);
2206
2207 #ifdef CY_DEBUG_OPEN
2208 printk("cyc shutdown Y card %d, chip %d, channel %d, "
2209 "base_addr %lx\n",
2210 card, chip, channel, (long)base_addr);
2211 #endif
2212
2213 CY_LOCK(info, flags);
2214
2215 /* Clear delta_msr_wait queue to avoid mem leaks. */
2216 wake_up_interruptible(&info->delta_msr_wait);
2217
2218 if (info->xmit_buf) {
2219 unsigned char *temp;
2220 temp = info->xmit_buf;
2221 info->xmit_buf = NULL;
2222 free_page((unsigned long)temp);
2223 }
2224 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2225 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2226 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2227 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2228 #ifdef CY_DEBUG_DTR
2229 printk("cyc shutdown dropping DTR\n");
2230 printk(" status: 0x%x, 0x%x\n",
2231 readb(base_addr + (CyMSVR1 << index)),
2232 readb(base_addr + (CyMSVR2 << index)));
2233 #endif
2234 }
2235 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2236 /* it may be appropriate to clear _XMIT at
2237 some later date (after testing)!!! */
2238
2239 if (info->tty) {
2240 set_bit(TTY_IO_ERROR, &info->tty->flags);
2241 }
2242 info->flags &= ~ASYNC_INITIALIZED;
2243 CY_UNLOCK(info, flags);
2244 } else {
2245 struct FIRM_ID __iomem *firm_id;
2246 struct ZFW_CTRL __iomem *zfw_ctrl;
2247 struct BOARD_CTRL __iomem *board_ctrl;
2248 struct CH_CTRL __iomem *ch_ctrl;
2249 int retval;
2250
2251 base_addr = cy_card[card].base_addr;
2252 #ifdef CY_DEBUG_OPEN
2253 printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
2254 card, channel, (long)base_addr);
2255 #endif
2256
2257 firm_id = base_addr + ID_ADDRESS;
2258 if (!ISZLOADED(cy_card[card])) {
2259 return;
2260 }
2261
2262 zfw_ctrl = cy_card[card].base_addr +
2263 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2264 board_ctrl = &zfw_ctrl->board_ctrl;
2265 ch_ctrl = zfw_ctrl->ch_ctrl;
2266
2267 CY_LOCK(info, flags);
2268
2269 if (info->xmit_buf) {
2270 unsigned char *temp;
2271 temp = info->xmit_buf;
2272 info->xmit_buf = NULL;
2273 free_page((unsigned long)temp);
2274 }
2275
2276 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2277 cy_writel(&ch_ctrl[channel].rs_control,
2278 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2279 ~(C_RS_RTS | C_RS_DTR)));
2280 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2281 C_CM_IOCTLM, 0L);
2282 if (retval != 0) {
2283 printk("cyc:shutdown retval on ttyC%d was %x\n",
2284 info->line, retval);
2285 }
2286 #ifdef CY_DEBUG_DTR
2287 printk("cyc:shutdown dropping Z DTR\n");
2288 #endif
2289 }
2290
2291 if (info->tty) {
2292 set_bit(TTY_IO_ERROR, &info->tty->flags);
2293 }
2294 info->flags &= ~ASYNC_INITIALIZED;
2295
2296 CY_UNLOCK(info, flags);
2297 }
2298
2299 #ifdef CY_DEBUG_OPEN
2300 printk(" cyc shutdown done\n");
2301 #endif
2302 } /* shutdown */
2303
2304 /*
2305 * ------------------------------------------------------------
2306 * cy_open() and friends
2307 * ------------------------------------------------------------
2308 */
2309
2310 static int
2311 block_til_ready(struct tty_struct *tty, struct file *filp,
2312 struct cyclades_port *info)
2313 {
2314 DECLARE_WAITQUEUE(wait, current);
2315 struct cyclades_card *cinfo;
2316 unsigned long flags;
2317 int chip, channel, index;
2318 int retval;
2319 void __iomem *base_addr;
2320
2321 cinfo = &cy_card[info->card];
2322 channel = info->line - cinfo->first_line;
2323
2324 /*
2325 * If the device is in the middle of being closed, then block
2326 * until it's done, and then try again.
2327 */
2328 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2329 if (info->flags & ASYNC_CLOSING) {
2330 interruptible_sleep_on(&info->close_wait);
2331 }
2332 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2333 }
2334
2335 /*
2336 * If non-blocking mode is set, then make the check up front
2337 * and then exit.
2338 */
2339 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2340 info->flags |= ASYNC_NORMAL_ACTIVE;
2341 return 0;
2342 }
2343
2344 /*
2345 * Block waiting for the carrier detect and the line to become
2346 * free (i.e., not in use by the callout). While we are in
2347 * this loop, info->count is dropped by one, so that
2348 * cy_close() knows when to free things. We restore it upon
2349 * exit, either normal or abnormal.
2350 */
2351 retval = 0;
2352 add_wait_queue(&info->open_wait, &wait);
2353 #ifdef CY_DEBUG_OPEN
2354 printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
2355 info->line, info->count);
2356 /**/
2357 #endif
2358 CY_LOCK(info, flags);
2359 if (!tty_hung_up_p(filp))
2360 info->count--;
2361 CY_UNLOCK(info, flags);
2362 #ifdef CY_DEBUG_COUNT
2363 printk("cyc block_til_ready: (%d): decrementing count to %d\n",
2364 current->pid, info->count);
2365 #endif
2366 info->blocked_open++;
2367
2368 if (!IS_CYC_Z(*cinfo)) {
2369 chip = channel >> 2;
2370 channel &= 0x03;
2371 index = cinfo->bus_index;
2372 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2373
2374 while (1) {
2375 CY_LOCK(info, flags);
2376 if ((tty->termios->c_cflag & CBAUD)) {
2377 cy_writeb(base_addr + (CyCAR << index),
2378 (u_char) channel);
2379 cy_writeb(base_addr + (CyMSVR1 << index),
2380 CyRTS);
2381 cy_writeb(base_addr + (CyMSVR2 << index),
2382 CyDTR);
2383 #ifdef CY_DEBUG_DTR
2384 printk("cyc:block_til_ready raising DTR\n");
2385 printk(" status: 0x%x, 0x%x\n",
2386 readb(base_addr + (CyMSVR1 << index)),
2387 readb(base_addr + (CyMSVR2 << index)));
2388 #endif
2389 }
2390 CY_UNLOCK(info, flags);
2391
2392 set_current_state(TASK_INTERRUPTIBLE);
2393 if (tty_hung_up_p(filp) ||
2394 !(info->flags & ASYNC_INITIALIZED)) {
2395 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2396 -EAGAIN : -ERESTARTSYS);
2397 break;
2398 }
2399
2400 CY_LOCK(info, flags);
2401 cy_writeb(base_addr + (CyCAR << index),
2402 (u_char) channel);
2403 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2404 (readb(base_addr +
2405 (CyMSVR1 << index)) & CyDCD))) {
2406 CY_UNLOCK(info, flags);
2407 break;
2408 }
2409 CY_UNLOCK(info, flags);
2410
2411 if (signal_pending(current)) {
2412 retval = -ERESTARTSYS;
2413 break;
2414 }
2415 #ifdef CY_DEBUG_OPEN
2416 printk("cyc block_til_ready blocking: ttyC%d, "
2417 "count = %d\n",
2418 info->line, info->count);
2419 /**/
2420 #endif
2421 schedule();
2422 }
2423 } else {
2424 struct FIRM_ID __iomem *firm_id;
2425 struct ZFW_CTRL __iomem *zfw_ctrl;
2426 struct BOARD_CTRL __iomem *board_ctrl;
2427 struct CH_CTRL __iomem *ch_ctrl;
2428 int retval;
2429
2430 base_addr = cinfo->base_addr;
2431 firm_id = base_addr + ID_ADDRESS;
2432 if (!ISZLOADED(*cinfo)) {
2433 __set_current_state(TASK_RUNNING);
2434 remove_wait_queue(&info->open_wait, &wait);
2435 return -EINVAL;
2436 }
2437
2438 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
2439 board_ctrl = &zfw_ctrl->board_ctrl;
2440 ch_ctrl = zfw_ctrl->ch_ctrl;
2441
2442 while (1) {
2443 if ((tty->termios->c_cflag & CBAUD)) {
2444 cy_writel(&ch_ctrl[channel].rs_control,
2445 readl(&ch_ctrl[channel].rs_control) |
2446 C_RS_RTS | C_RS_DTR);
2447 retval = cyz_issue_cmd(&cy_card[info->card],
2448 channel, C_CM_IOCTLM, 0L);
2449 if (retval != 0) {
2450 printk("cyc:block_til_ready retval on "
2451 "ttyC%d was %x\n",
2452 info->line, retval);
2453 }
2454 #ifdef CY_DEBUG_DTR
2455 printk("cyc:block_til_ready raising Z DTR\n");
2456 #endif
2457 }
2458
2459 set_current_state(TASK_INTERRUPTIBLE);
2460 if (tty_hung_up_p(filp) ||
2461 !(info->flags & ASYNC_INITIALIZED)) {
2462 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2463 -EAGAIN : -ERESTARTSYS);
2464 break;
2465 }
2466 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2467 (readl(&ch_ctrl[channel].rs_status) &
2468 C_RS_DCD))) {
2469 break;
2470 }
2471 if (signal_pending(current)) {
2472 retval = -ERESTARTSYS;
2473 break;
2474 }
2475 #ifdef CY_DEBUG_OPEN
2476 printk("cyc block_til_ready blocking: ttyC%d, "
2477 "count = %d\n",
2478 info->line, info->count);
2479 /**/
2480 #endif
2481 schedule();
2482 }
2483 }
2484 __set_current_state(TASK_RUNNING);
2485 remove_wait_queue(&info->open_wait, &wait);
2486 if (!tty_hung_up_p(filp)) {
2487 info->count++;
2488 #ifdef CY_DEBUG_COUNT
2489 printk("cyc:block_til_ready (%d): incrementing count to %d\n",
2490 current->pid, info->count);
2491 #endif
2492 }
2493 info->blocked_open--;
2494 #ifdef CY_DEBUG_OPEN
2495 printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
2496 info->line, info->count);
2497 /**/
2498 #endif
2499 if (retval)
2500 return retval;
2501 info->flags |= ASYNC_NORMAL_ACTIVE;
2502 return 0;
2503 } /* block_til_ready */
2504
2505 /*
2506 * This routine is called whenever a serial port is opened. It
2507 * performs the serial-specific initialization for the tty structure.
2508 */
2509 static int cy_open(struct tty_struct *tty, struct file *filp)
2510 {
2511 struct cyclades_port *info;
2512 int retval, line;
2513
2514 line = tty->index;
2515 if ((line < 0) || (NR_PORTS <= line)) {
2516 return -ENODEV;
2517 }
2518 info = &cy_port[line];
2519 if (info->line < 0) {
2520 return -ENODEV;
2521 }
2522
2523 /* If the card's firmware hasn't been loaded,
2524 treat it as absent from the system. This
2525 will make the user pay attention.
2526 */
2527 if (IS_CYC_Z(cy_card[info->card])) {
2528 struct cyclades_card *cinfo = &cy_card[info->card];
2529 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2530
2531 if (!ISZLOADED(*cinfo)) {
2532 if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2533 (cinfo->ctl_addr))->mail_box_0)) &&
2534 Z_FPGA_CHECK(*cinfo)) &&
2535 (ZFIRM_HLT == readl(
2536 &firm_id->signature))) {
2537 printk("cyc:Cyclades-Z Error: you need an "
2538 "external power supply for this number "
2539 "of ports.\n\rFirmware halted.\r\n");
2540 } else {
2541 printk("cyc:Cyclades-Z firmware not yet "
2542 "loaded\n");
2543 }
2544 return -ENODEV;
2545 }
2546 #ifdef CONFIG_CYZ_INTR
2547 else {
2548 /* In case this Z board is operating in interrupt mode, its
2549 interrupts should be enabled as soon as the first open
2550 happens to one of its ports. */
2551 if (!cinfo->intr_enabled) {
2552 struct ZFW_CTRL __iomem *zfw_ctrl;
2553 struct BOARD_CTRL __iomem *board_ctrl;
2554
2555 zfw_ctrl = cinfo->base_addr +
2556 (readl(&firm_id->zfwctrl_addr) &
2557 0xfffff);
2558
2559 board_ctrl = &zfw_ctrl->board_ctrl;
2560
2561 /* Enable interrupts on the PLX chip */
2562 cy_writew(cinfo->ctl_addr + 0x68,
2563 readw(cinfo->ctl_addr + 0x68) | 0x0900);
2564 /* Enable interrupts on the FW */
2565 retval = cyz_issue_cmd(cinfo, 0,
2566 C_CM_IRQ_ENBL, 0L);
2567 if (retval != 0) {
2568 printk("cyc:IRQ enable retval was %x\n",
2569 retval);
2570 }
2571 cinfo->nports =
2572 (int)readl(&board_ctrl->n_channel);
2573 cinfo->intr_enabled = 1;
2574 }
2575 }
2576 #endif /* CONFIG_CYZ_INTR */
2577 /* Make sure this Z port really exists in hardware */
2578 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2579 return -ENODEV;
2580 }
2581 #ifdef CY_DEBUG_OTHER
2582 printk("cyc:cy_open ttyC%d\n", info->line); /* */
2583 #endif
2584 tty->driver_data = info;
2585 info->tty = tty;
2586 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2587 return -ENODEV;
2588 }
2589 #ifdef CY_DEBUG_OPEN
2590 printk("cyc:cy_open ttyC%d, count = %d\n", info->line, info->count);
2591 /**/
2592 #endif
2593 info->count++;
2594 #ifdef CY_DEBUG_COUNT
2595 printk("cyc:cy_open (%d): incrementing count to %d\n",
2596 current->pid, info->count);
2597 #endif
2598
2599 /*
2600 * If the port is the middle of closing, bail out now
2601 */
2602 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2603 if (info->flags & ASYNC_CLOSING)
2604 interruptible_sleep_on(&info->close_wait);
2605 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2606 }
2607
2608 /*
2609 * Start up serial port
2610 */
2611 retval = startup(info);
2612 if (retval) {
2613 return retval;
2614 }
2615
2616 retval = block_til_ready(tty, filp, info);
2617 if (retval) {
2618 #ifdef CY_DEBUG_OPEN
2619 printk("cyc:cy_open returning after block_til_ready with %d\n",
2620 retval);
2621 #endif
2622 return retval;
2623 }
2624
2625 info->throttle = 0;
2626
2627 #ifdef CY_DEBUG_OPEN
2628 printk(" cyc:cy_open done\n");
2629 /**/
2630 #endif
2631 return 0;
2632 } /* cy_open */
2633
2634 /*
2635 * cy_wait_until_sent() --- wait until the transmitter is empty
2636 */
2637 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2638 {
2639 struct cyclades_port *info = tty->driver_data;
2640 void __iomem *base_addr;
2641 int card, chip, channel, index;
2642 unsigned long orig_jiffies;
2643 int char_time;
2644
2645 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2646 return;
2647
2648 if (info->xmit_fifo_size == 0)
2649 return; /* Just in case.... */
2650
2651 orig_jiffies = jiffies;
2652 /*
2653 * Set the check interval to be 1/5 of the estimated time to
2654 * send a single character, and make it at least 1. The check
2655 * interval should also be less than the timeout.
2656 *
2657 * Note: we have to use pretty tight timings here to satisfy
2658 * the NIST-PCTS.
2659 */
2660 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2661 char_time = char_time / 5;
2662 if (char_time <= 0)
2663 char_time = 1;
2664 if (timeout < 0)
2665 timeout = 0;
2666 if (timeout)
2667 char_time = min(char_time, timeout);
2668 /*
2669 * If the transmitter hasn't cleared in twice the approximate
2670 * amount of time to send the entire FIFO, it probably won't
2671 * ever clear. This assumes the UART isn't doing flow
2672 * control, which is currently the case. Hence, if it ever
2673 * takes longer than info->timeout, this is probably due to a
2674 * UART bug of some kind. So, we clamp the timeout parameter at
2675 * 2*info->timeout.
2676 */
2677 if (!timeout || timeout > 2 * info->timeout)
2678 timeout = 2 * info->timeout;
2679 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2680 printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
2681 printk("jiff=%lu...", jiffies);
2682 #endif
2683 card = info->card;
2684 channel = (info->line) - (cy_card[card].first_line);
2685 if (!IS_CYC_Z(cy_card[card])) {
2686 chip = channel >> 2;
2687 channel &= 0x03;
2688 index = cy_card[card].bus_index;
2689 base_addr =
2690 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
2691 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2692 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2693 printk("Not clean (jiff=%lu)...", jiffies);
2694 #endif
2695 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2696 break;
2697 if (timeout && time_after(jiffies, orig_jiffies +
2698 timeout))
2699 break;
2700 }
2701 } else {
2702 /* Nothing to do! */
2703 }
2704 /* Run one more char cycle */
2705 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2706 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2707 printk("Clean (jiff=%lu)...done\n", jiffies);
2708 #endif
2709 }
2710
2711 /*
2712 * This routine is called when a particular tty device is closed.
2713 */
2714 static void cy_close(struct tty_struct *tty, struct file *filp)
2715 {
2716 struct cyclades_port *info = tty->driver_data;
2717 unsigned long flags;
2718
2719 #ifdef CY_DEBUG_OTHER
2720 printk("cyc:cy_close ttyC%d\n", info->line);
2721 #endif
2722
2723 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2724 return;
2725 }
2726
2727 CY_LOCK(info, flags);
2728 /* If the TTY is being hung up, nothing to do */
2729 if (tty_hung_up_p(filp)) {
2730 CY_UNLOCK(info, flags);
2731 return;
2732 }
2733 #ifdef CY_DEBUG_OPEN
2734 printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
2735 #endif
2736 if ((tty->count == 1) && (info->count != 1)) {
2737 /*
2738 * Uh, oh. tty->count is 1, which means that the tty
2739 * structure will be freed. Info->count should always
2740 * be one in these conditions. If it's greater than
2741 * one, we've got real problems, since it means the
2742 * serial port won't be shutdown.
2743 */
2744 printk("cyc:cy_close: bad serial port count; tty->count is 1, "
2745 "info->count is %d\n", info->count);
2746 info->count = 1;
2747 }
2748 #ifdef CY_DEBUG_COUNT
2749 printk("cyc:cy_close at (%d): decrementing count to %d\n",
2750 current->pid, info->count - 1);
2751 #endif
2752 if (--info->count < 0) {
2753 #ifdef CY_DEBUG_COUNT
2754 printk("cyc:cyc_close setting count to 0\n");
2755 #endif
2756 info->count = 0;
2757 }
2758 if (info->count) {
2759 CY_UNLOCK(info, flags);
2760 return;
2761 }
2762 info->flags |= ASYNC_CLOSING;
2763
2764 /*
2765 * Now we wait for the transmit buffer to clear; and we notify
2766 * the line discipline to only process XON/XOFF characters.
2767 */
2768 tty->closing = 1;
2769 CY_UNLOCK(info, flags);
2770 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2771 tty_wait_until_sent(tty, info->closing_wait);
2772 }
2773 CY_LOCK(info, flags);
2774
2775 if (!IS_CYC_Z(cy_card[info->card])) {
2776 int channel = info->line - cy_card[info->card].first_line;
2777 int index = cy_card[info->card].bus_index;
2778 void __iomem *base_addr = cy_card[info->card].base_addr +
2779 (cy_chip_offset[channel >> 2] << index);
2780 /* Stop accepting input */
2781 channel &= 0x03;
2782 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2783 cy_writeb(base_addr + (CySRER << index),
2784 readb(base_addr + (CySRER << index)) & ~CyRxData);
2785 if (info->flags & ASYNC_INITIALIZED) {
2786 /* Waiting for on-board buffers to be empty before closing
2787 the port */
2788 CY_UNLOCK(info, flags);
2789 cy_wait_until_sent(tty, info->timeout);
2790 CY_LOCK(info, flags);
2791 }
2792 } else {
2793 #ifdef Z_WAKE
2794 /* Waiting for on-board buffers to be empty before closing the port */
2795 void __iomem *base_addr = cy_card[info->card].base_addr;
2796 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2797 struct ZFW_CTRL __iomem *zfw_ctrl =
2798 base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2799 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2800 int channel = info->line - cy_card[info->card].first_line;
2801 int retval;
2802
2803 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2804 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2805 C_CM_IOCTLW, 0L);
2806 if (retval != 0) {
2807 printk("cyc:cy_close retval on ttyC%d was %x\n",
2808 info->line, retval);
2809 }
2810 CY_UNLOCK(info, flags);
2811 interruptible_sleep_on(&info->shutdown_wait);
2812 CY_LOCK(info, flags);
2813 }
2814 #endif
2815 }
2816
2817 CY_UNLOCK(info, flags);
2818 shutdown(info);
2819 if (tty->driver->flush_buffer)
2820 tty->driver->flush_buffer(tty);
2821 tty_ldisc_flush(tty);
2822 CY_LOCK(info, flags);
2823
2824 tty->closing = 0;
2825 info->event = 0;
2826 info->tty = NULL;
2827 if (info->blocked_open) {
2828 CY_UNLOCK(info, flags);
2829 if (info->close_delay) {
2830 msleep_interruptible(jiffies_to_msecs
2831 (info->close_delay));
2832 }
2833 wake_up_interruptible(&info->open_wait);
2834 CY_LOCK(info, flags);
2835 }
2836 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2837 wake_up_interruptible(&info->close_wait);
2838
2839 #ifdef CY_DEBUG_OTHER
2840 printk(" cyc:cy_close done\n");
2841 #endif
2842
2843 CY_UNLOCK(info, flags);
2844 } /* cy_close */
2845
2846 /* This routine gets called when tty_write has put something into
2847 * the write_queue. The characters may come from user space or
2848 * kernel space.
2849 *
2850 * This routine will return the number of characters actually
2851 * accepted for writing.
2852 *
2853 * If the port is not already transmitting stuff, start it off by
2854 * enabling interrupts. The interrupt service routine will then
2855 * ensure that the characters are sent.
2856 * If the port is already active, there is no need to kick it.
2857 *
2858 */
2859 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2860 {
2861 struct cyclades_port *info = tty->driver_data;
2862 unsigned long flags;
2863 int c, ret = 0;
2864
2865 #ifdef CY_DEBUG_IO
2866 printk("cyc:cy_write ttyC%d\n", info->line); /* */
2867 #endif
2868
2869 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2870 return 0;
2871 }
2872
2873 if (!info->xmit_buf)
2874 return 0;
2875
2876 CY_LOCK(info, flags);
2877 while (1) {
2878 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2879 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2880
2881 if (c <= 0)
2882 break;
2883
2884 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2885 info->xmit_head = (info->xmit_head + c) &
2886 (SERIAL_XMIT_SIZE - 1);
2887 info->xmit_cnt += c;
2888 buf += c;
2889 count -= c;
2890 ret += c;
2891 }
2892 CY_UNLOCK(info, flags);
2893
2894 info->idle_stats.xmit_bytes += ret;
2895 info->idle_stats.xmit_idle = jiffies;
2896
2897 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2898 start_xmit(info);
2899 }
2900 return ret;
2901 } /* cy_write */
2902
2903 /*
2904 * This routine is called by the kernel to write a single
2905 * character to the tty device. If the kernel uses this routine,
2906 * it must call the flush_chars() routine (if defined) when it is
2907 * done stuffing characters into the driver. If there is no room
2908 * in the queue, the character is ignored.
2909 */
2910 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2911 {
2912 struct cyclades_port *info = tty->driver_data;
2913 unsigned long flags;
2914
2915 #ifdef CY_DEBUG_IO
2916 printk("cyc:cy_put_char ttyC%d\n", info->line);
2917 #endif
2918
2919 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2920 return;
2921
2922 if (!info->xmit_buf)
2923 return;
2924
2925 CY_LOCK(info, flags);
2926 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2927 CY_UNLOCK(info, flags);
2928 return;
2929 }
2930
2931 info->xmit_buf[info->xmit_head++] = ch;
2932 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2933 info->xmit_cnt++;
2934 info->idle_stats.xmit_bytes++;
2935 info->idle_stats.xmit_idle = jiffies;
2936 CY_UNLOCK(info, flags);
2937 } /* cy_put_char */
2938
2939 /*
2940 * This routine is called by the kernel after it has written a
2941 * series of characters to the tty device using put_char().
2942 */
2943 static void cy_flush_chars(struct tty_struct *tty)
2944 {
2945 struct cyclades_port *info = tty->driver_data;
2946
2947 #ifdef CY_DEBUG_IO
2948 printk("cyc:cy_flush_chars ttyC%d\n", info->line); /* */
2949 #endif
2950
2951 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2952 return;
2953
2954 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2955 !info->xmit_buf)
2956 return;
2957
2958 start_xmit(info);
2959 } /* cy_flush_chars */
2960
2961 /*
2962 * This routine returns the numbers of characters the tty driver
2963 * will accept for queuing to be written. This number is subject
2964 * to change as output buffers get emptied, or if the output flow
2965 * control is activated.
2966 */
2967 static int cy_write_room(struct tty_struct *tty)
2968 {
2969 struct cyclades_port *info = tty->driver_data;
2970 int ret;
2971
2972 #ifdef CY_DEBUG_IO
2973 printk("cyc:cy_write_room ttyC%d\n", info->line); /* */
2974 #endif
2975
2976 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2977 return 0;
2978 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2979 if (ret < 0)
2980 ret = 0;
2981 return ret;
2982 } /* cy_write_room */
2983
2984 static int cy_chars_in_buffer(struct tty_struct *tty)
2985 {
2986 struct cyclades_port *info = tty->driver_data;
2987 int card, channel;
2988
2989 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2990 return 0;
2991
2992 card = info->card;
2993 channel = (info->line) - (cy_card[card].first_line);
2994
2995 #ifdef Z_EXT_CHARS_IN_BUFFER
2996 if (!IS_CYC_Z(cy_card[card])) {
2997 #endif /* Z_EXT_CHARS_IN_BUFFER */
2998 #ifdef CY_DEBUG_IO
2999 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt); /* */
3000 #endif
3001 return info->xmit_cnt;
3002 #ifdef Z_EXT_CHARS_IN_BUFFER
3003 } else {
3004 static struct FIRM_ID *firm_id;
3005 static struct ZFW_CTRL *zfw_ctrl;
3006 static struct CH_CTRL *ch_ctrl;
3007 static struct BUF_CTRL *buf_ctrl;
3008 int char_count;
3009 __u32 tx_put, tx_get, tx_bufsize;
3010
3011 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3012 zfw_ctrl = cy_card[card].base_addr +
3013 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3014 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3015 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3016
3017 tx_get = readl(&buf_ctrl->tx_get);
3018 tx_put = readl(&buf_ctrl->tx_put);
3019 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
3020 if (tx_put >= tx_get)
3021 char_count = tx_put - tx_get;
3022 else
3023 char_count = tx_put - tx_get + tx_bufsize;
3024 #ifdef CY_DEBUG_IO
3025 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt + char_count); /* */
3026 #endif
3027 return info->xmit_cnt + char_count;
3028 }
3029 #endif /* Z_EXT_CHARS_IN_BUFFER */
3030 } /* cy_chars_in_buffer */
3031
3032 /*
3033 * ------------------------------------------------------------
3034 * cy_ioctl() and friends
3035 * ------------------------------------------------------------
3036 */
3037
3038 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
3039 {
3040 int co, co_val, bpr;
3041 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3042 25000000);
3043
3044 if (baud == 0) {
3045 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3046 return;
3047 }
3048
3049 /* determine which prescaler to use */
3050 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3051 if (cy_clock / co_val / baud > 63)
3052 break;
3053 }
3054
3055 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3056 if (bpr > 255)
3057 bpr = 255;
3058
3059 info->tbpr = info->rbpr = bpr;
3060 info->tco = info->rco = co;
3061 }
3062
3063 /*
3064 * This routine finds or computes the various line characteristics.
3065 * It used to be called config_setup
3066 */
3067 static void set_line_char(struct cyclades_port *info)
3068 {
3069 unsigned long flags;
3070 void __iomem *base_addr;
3071 int card, chip, channel, index;
3072 unsigned cflag, iflag;
3073 unsigned short chip_number;
3074 int baud, baud_rate = 0;
3075 int i;
3076
3077 if (!info->tty || !info->tty->termios) {
3078 return;
3079 }
3080 if (info->line == -1) {
3081 return;
3082 }
3083 cflag = info->tty->termios->c_cflag;
3084 iflag = info->tty->termios->c_iflag;
3085
3086 /*
3087 * Set up the tty->alt_speed kludge
3088 */
3089 if (info->tty) {
3090 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3091 info->tty->alt_speed = 57600;
3092 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3093 info->tty->alt_speed = 115200;
3094 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3095 info->tty->alt_speed = 230400;
3096 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3097 info->tty->alt_speed = 460800;
3098 }
3099
3100 card = info->card;
3101 channel = (info->line) - (cy_card[card].first_line);
3102 chip_number = channel / 4;
3103
3104 if (!IS_CYC_Z(cy_card[card])) {
3105
3106 index = cy_card[card].bus_index;
3107
3108 /* baud rate */
3109 baud = tty_get_baud_rate(info->tty);
3110 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3111 ASYNC_SPD_CUST) {
3112 if (info->custom_divisor)
3113 baud_rate = info->baud / info->custom_divisor;
3114 else
3115 baud_rate = info->baud;
3116 } else if (baud > CD1400_MAX_SPEED) {
3117 baud = CD1400_MAX_SPEED;
3118 }
3119 /* find the baud index */
3120 for (i = 0; i < 20; i++) {
3121 if (baud == baud_table[i]) {
3122 break;
3123 }
3124 }
3125 if (i == 20) {
3126 i = 19; /* CD1400_MAX_SPEED */
3127 }
3128
3129 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3130 ASYNC_SPD_CUST) {
3131 cyy_baud_calc(info, baud_rate);
3132 } else {
3133 if (info->chip_rev >= CD1400_REV_J) {
3134 /* It is a CD1400 rev. J or later */
3135 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3136 info->tco = baud_co_60[i]; /* Tx CO */
3137 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3138 info->rco = baud_co_60[i]; /* Rx CO */
3139 } else {
3140 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3141 info->tco = baud_co_25[i]; /* Tx CO */
3142 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3143 info->rco = baud_co_25[i]; /* Rx CO */
3144 }
3145 }
3146 if (baud_table[i] == 134) {
3147 /* get it right for 134.5 baud */
3148 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3149 2;
3150 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3151 ASYNC_SPD_CUST) {
3152 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3153 baud_rate) + 2;
3154 } else if (baud_table[i]) {
3155 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3156 baud_table[i]) + 2;
3157 /* this needs to be propagated into the card info */
3158 } else {
3159 info->timeout = 0;
3160 }
3161 /* By tradition (is it a standard?) a baud rate of zero
3162 implies the line should be/has been closed. A bit
3163 later in this routine such a test is performed. */
3164
3165 /* byte size and parity */
3166 info->cor5 = 0;
3167 info->cor4 = 0;
3168 /* receive threshold */
3169 info->cor3 = (info->default_threshold ?
3170 info->default_threshold : baud_cor3[i]);
3171 info->cor2 = CyETC;
3172 switch (cflag & CSIZE) {
3173 case CS5:
3174 info->cor1 = Cy_5_BITS;
3175 break;
3176 case CS6:
3177 info->cor1 = Cy_6_BITS;
3178 break;
3179 case CS7:
3180 info->cor1 = Cy_7_BITS;
3181 break;
3182 case CS8:
3183 info->cor1 = Cy_8_BITS;
3184 break;
3185 }
3186 if (cflag & CSTOPB) {
3187 info->cor1 |= Cy_2_STOP;
3188 }
3189 if (cflag & PARENB) {
3190 if (cflag & PARODD) {
3191 info->cor1 |= CyPARITY_O;
3192 } else {
3193 info->cor1 |= CyPARITY_E;
3194 }
3195 } else {
3196 info->cor1 |= CyPARITY_NONE;
3197 }
3198
3199 /* CTS flow control flag */
3200 if (cflag & CRTSCTS) {
3201 info->flags |= ASYNC_CTS_FLOW;
3202 info->cor2 |= CyCtsAE;
3203 } else {
3204 info->flags &= ~ASYNC_CTS_FLOW;
3205 info->cor2 &= ~CyCtsAE;
3206 }
3207 if (cflag & CLOCAL)
3208 info->flags &= ~ASYNC_CHECK_CD;
3209 else
3210 info->flags |= ASYNC_CHECK_CD;
3211
3212 /***********************************************
3213 The hardware option, CyRtsAO, presents RTS when
3214 the chip has characters to send. Since most modems
3215 use RTS as reverse (inbound) flow control, this
3216 option is not used. If inbound flow control is
3217 necessary, DTR can be programmed to provide the
3218 appropriate signals for use with a non-standard
3219 cable. Contact Marcio Saito for details.
3220 ***********************************************/
3221
3222 chip = channel >> 2;
3223 channel &= 0x03;
3224 base_addr = cy_card[card].base_addr +
3225 (cy_chip_offset[chip] << index);
3226
3227 CY_LOCK(info, flags);
3228 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3229
3230 /* tx and rx baud rate */
3231
3232 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3233 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3234 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3235 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3236
3237 /* set line characteristics according configuration */
3238
3239 cy_writeb(base_addr + (CySCHR1 << index),
3240 START_CHAR(info->tty));
3241 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3242 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3243 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3244 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3245 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3246 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3247
3248 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3249 CyCOR3ch, index);
3250
3251 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3252 cy_writeb(base_addr + (CyRTPR << index),
3253 (info->default_timeout ? info->default_timeout : 0x02));
3254 /* 10ms rx timeout */
3255
3256 if (C_CLOCAL(info->tty)) {
3257 /* without modem intr */
3258 cy_writeb(base_addr + (CySRER << index),
3259 readb(base_addr + (CySRER << index)) | CyMdmCh);
3260 /* act on 1->0 modem transitions */
3261 if ((cflag & CRTSCTS) && info->rflow) {
3262 cy_writeb(base_addr + (CyMCOR1 << index),
3263 (CyCTS | rflow_thr[i]));
3264 } else {
3265 cy_writeb(base_addr + (CyMCOR1 << index),
3266 CyCTS);
3267 }
3268 /* act on 0->1 modem transitions */
3269 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3270 } else {
3271 /* without modem intr */
3272 cy_writeb(base_addr + (CySRER << index),
3273 readb(base_addr +
3274 (CySRER << index)) | CyMdmCh);
3275 /* act on 1->0 modem transitions */
3276 if ((cflag & CRTSCTS) && info->rflow) {
3277 cy_writeb(base_addr + (CyMCOR1 << index),
3278 (CyDSR | CyCTS | CyRI | CyDCD |
3279 rflow_thr[i]));
3280 } else {
3281 cy_writeb(base_addr + (CyMCOR1 << index),
3282 CyDSR | CyCTS | CyRI | CyDCD);
3283 }
3284 /* act on 0->1 modem transitions */
3285 cy_writeb(base_addr + (CyMCOR2 << index),
3286 CyDSR | CyCTS | CyRI | CyDCD);
3287 }
3288
3289 if (i == 0) { /* baud rate is zero, turn off line */
3290 if (info->rtsdtr_inv) {
3291 cy_writeb(base_addr + (CyMSVR1 << index),
3292 ~CyRTS);
3293 } else {
3294 cy_writeb(base_addr + (CyMSVR2 << index),
3295 ~CyDTR);
3296 }
3297 #ifdef CY_DEBUG_DTR
3298 printk("cyc:set_line_char dropping DTR\n");
3299 printk(" status: 0x%x, 0x%x\n",
3300 readb(base_addr + (CyMSVR1 << index)),
3301 readb(base_addr + (CyMSVR2 << index)));
3302 #endif
3303 } else {
3304 if (info->rtsdtr_inv) {
3305 cy_writeb(base_addr + (CyMSVR1 << index),
3306 CyRTS);
3307 } else {
3308 cy_writeb(base_addr + (CyMSVR2 << index),
3309 CyDTR);
3310 }
3311 #ifdef CY_DEBUG_DTR
3312 printk("cyc:set_line_char raising DTR\n");
3313 printk(" status: 0x%x, 0x%x\n",
3314 readb(base_addr + (CyMSVR1 << index)),
3315 readb(base_addr + (CyMSVR2 << index)));
3316 #endif
3317 }
3318
3319 if (info->tty) {
3320 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3321 }
3322 CY_UNLOCK(info, flags);
3323
3324 } else {
3325 struct FIRM_ID __iomem *firm_id;
3326 struct ZFW_CTRL __iomem *zfw_ctrl;
3327 struct BOARD_CTRL __iomem *board_ctrl;
3328 struct CH_CTRL __iomem *ch_ctrl;
3329 struct BUF_CTRL __iomem *buf_ctrl;
3330 __u32 sw_flow;
3331 int retval;
3332
3333 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3334 if (!ISZLOADED(cy_card[card])) {
3335 return;
3336 }
3337
3338 zfw_ctrl = cy_card[card].base_addr +
3339 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3340 board_ctrl = &zfw_ctrl->board_ctrl;
3341 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3342 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3343
3344 /* baud rate */
3345 baud = tty_get_baud_rate(info->tty);
3346 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3347 ASYNC_SPD_CUST) {
3348 if (info->custom_divisor)
3349 baud_rate = info->baud / info->custom_divisor;
3350 else
3351 baud_rate = info->baud;
3352 } else if (baud > CYZ_MAX_SPEED) {
3353 baud = CYZ_MAX_SPEED;
3354 }
3355 cy_writel(&ch_ctrl->comm_baud, baud);
3356
3357 if (baud == 134) {
3358 /* get it right for 134.5 baud */
3359 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3360 2;
3361 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3362 ASYNC_SPD_CUST) {
3363 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3364 baud_rate) + 2;
3365 } else if (baud) {
3366 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3367 baud) + 2;
3368 /* this needs to be propagated into the card info */
3369 } else {
3370 info->timeout = 0;
3371 }
3372
3373 /* byte size and parity */
3374 switch (cflag & CSIZE) {
3375 case CS5:
3376 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3377 break;
3378 case CS6:
3379 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3380 break;
3381 case CS7:
3382 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3383 break;
3384 case CS8:
3385 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3386 break;
3387 }
3388 if (cflag & CSTOPB) {
3389 cy_writel(&ch_ctrl->comm_data_l,
3390 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3391 } else {
3392 cy_writel(&ch_ctrl->comm_data_l,
3393 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3394 }
3395 if (cflag & PARENB) {
3396 if (cflag & PARODD) {
3397 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3398 } else {
3399 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3400 }
3401 } else {
3402 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3403 }
3404
3405 /* CTS flow control flag */
3406 if (cflag & CRTSCTS) {
3407 cy_writel(&ch_ctrl->hw_flow,
3408 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3409 } else {
3410 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3411 ~(C_RS_CTS | C_RS_RTS));
3412 }
3413 /* As the HW flow control is done in firmware, the driver
3414 doesn't need to care about it */
3415 info->flags &= ~ASYNC_CTS_FLOW;
3416
3417 /* XON/XOFF/XANY flow control flags */
3418 sw_flow = 0;
3419 if (iflag & IXON) {
3420 sw_flow |= C_FL_OXX;
3421 if (iflag & IXANY)
3422 sw_flow |= C_FL_OIXANY;
3423 }
3424 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3425
3426 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
3427 if (retval != 0) {
3428 printk("cyc:set_line_char retval on ttyC%d was %x\n",
3429 info->line, retval);
3430 }
3431
3432 /* CD sensitivity */
3433 if (cflag & CLOCAL) {
3434 info->flags &= ~ASYNC_CHECK_CD;
3435 } else {
3436 info->flags |= ASYNC_CHECK_CD;
3437 }
3438
3439 if (baud == 0) { /* baud rate is zero, turn off line */
3440 cy_writel(&ch_ctrl->rs_control,
3441 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3442 #ifdef CY_DEBUG_DTR
3443 printk("cyc:set_line_char dropping Z DTR\n");
3444 #endif
3445 } else {
3446 cy_writel(&ch_ctrl->rs_control,
3447 readl(&ch_ctrl->rs_control) | C_RS_DTR);
3448 #ifdef CY_DEBUG_DTR
3449 printk("cyc:set_line_char raising Z DTR\n");
3450 #endif
3451 }
3452
3453 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTLM,0L);
3454 if (retval != 0) {
3455 printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
3456 info->line, retval);
3457 }
3458
3459 if (info->tty) {
3460 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3461 }
3462 }
3463 } /* set_line_char */
3464
3465 static int
3466 get_serial_info(struct cyclades_port *info,
3467 struct serial_struct __user * retinfo)
3468 {
3469 struct serial_struct tmp;
3470 struct cyclades_card *cinfo = &cy_card[info->card];
3471
3472 if (!retinfo)
3473 return -EFAULT;
3474 memset(&tmp, 0, sizeof(tmp));
3475 tmp.type = info->type;
3476 tmp.line = info->line;
3477 tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
3478 tmp.irq = cinfo->irq;
3479 tmp.flags = info->flags;
3480 tmp.close_delay = info->close_delay;
3481 tmp.closing_wait = info->closing_wait;
3482 tmp.baud_base = info->baud;
3483 tmp.custom_divisor = info->custom_divisor;
3484 tmp.hub6 = 0; /*!!! */
3485 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3486 } /* get_serial_info */
3487
3488 static int
3489 set_serial_info(struct cyclades_port *info,
3490 struct serial_struct __user * new_info)
3491 {
3492 struct serial_struct new_serial;
3493 struct cyclades_port old_info;
3494
3495 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3496 return -EFAULT;
3497 old_info = *info;
3498
3499 if (!capable(CAP_SYS_ADMIN)) {
3500 if (new_serial.close_delay != info->close_delay ||
3501 new_serial.baud_base != info->baud ||
3502 (new_serial.flags & ASYNC_FLAGS &
3503 ~ASYNC_USR_MASK) !=
3504 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3505 return -EPERM;
3506 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3507 (new_serial.flags & ASYNC_USR_MASK);
3508 info->baud = new_serial.baud_base;
3509 info->custom_divisor = new_serial.custom_divisor;
3510 goto check_and_exit;
3511 }
3512
3513 /*
3514 * OK, past this point, all the error checking has been done.
3515 * At this point, we start making changes.....
3516 */
3517
3518 info->baud = new_serial.baud_base;
3519 info->custom_divisor = new_serial.custom_divisor;
3520 info->flags = (info->flags & ~ASYNC_FLAGS) |
3521 (new_serial.flags & ASYNC_FLAGS);
3522 info->close_delay = new_serial.close_delay * HZ / 100;
3523 info->closing_wait = new_serial.closing_wait * HZ / 100;
3524
3525 check_and_exit:
3526 if (info->flags & ASYNC_INITIALIZED) {
3527 set_line_char(info);
3528 return 0;
3529 } else {
3530 return startup(info);
3531 }
3532 } /* set_serial_info */
3533
3534 /*
3535 * get_lsr_info - get line status register info
3536 *
3537 * Purpose: Let user call ioctl() to get info when the UART physically
3538 * is emptied. On bus types like RS485, the transmitter must
3539 * release the bus after transmitting. This must be done when
3540 * the transmit shift register is empty, not be done when the
3541 * transmit holding register is empty. This functionality
3542 * allows an RS485 driver to be written in user space.
3543 */
3544 static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3545 {
3546 int card, chip, channel, index;
3547 unsigned char status;
3548 unsigned int result;
3549 unsigned long flags;
3550 void __iomem *base_addr;
3551
3552 card = info->card;
3553 channel = (info->line) - (cy_card[card].first_line);
3554 if (!IS_CYC_Z(cy_card[card])) {
3555 chip = channel >> 2;
3556 channel &= 0x03;
3557 index = cy_card[card].bus_index;
3558 base_addr =
3559 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3560
3561 CY_LOCK(info, flags);
3562 status = readb(base_addr + (CySRER << index)) &
3563 (CyTxRdy | CyTxMpty);
3564 CY_UNLOCK(info, flags);
3565 result = (status ? 0 : TIOCSER_TEMT);
3566 } else {
3567 /* Not supported yet */
3568 return -EINVAL;
3569 }
3570 return put_user(result, (unsigned long __user *)value);
3571 }
3572
3573 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3574 {
3575 struct cyclades_port *info = tty->driver_data;
3576 int card, chip, channel, index;
3577 void __iomem *base_addr;
3578 unsigned long flags;
3579 unsigned char status;
3580 unsigned long lstatus;
3581 unsigned int result;
3582 struct FIRM_ID __iomem *firm_id;
3583 struct ZFW_CTRL __iomem *zfw_ctrl;
3584 struct BOARD_CTRL __iomem *board_ctrl;
3585 struct CH_CTRL __iomem *ch_ctrl;
3586
3587 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3588 return -ENODEV;
3589
3590 card = info->card;
3591 channel = (info->line) - (cy_card[card].first_line);
3592 if (!IS_CYC_Z(cy_card[card])) {
3593 chip = channel >> 2;
3594 channel &= 0x03;
3595 index = cy_card[card].bus_index;
3596 base_addr =
3597 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3598
3599 CY_LOCK(info, flags);
3600 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3601 status = readb(base_addr + (CyMSVR1 << index));
3602 status |= readb(base_addr + (CyMSVR2 << index));
3603 CY_UNLOCK(info, flags);
3604
3605 if (info->rtsdtr_inv) {
3606 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3607 ((status & CyDTR) ? TIOCM_RTS : 0);
3608 } else {
3609 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3610 ((status & CyDTR) ? TIOCM_DTR : 0);
3611 }
3612 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3613 ((status & CyRI) ? TIOCM_RNG : 0) |
3614 ((status & CyDSR) ? TIOCM_DSR : 0) |
3615 ((status & CyCTS) ? TIOCM_CTS : 0);
3616 } else {
3617 base_addr = cy_card[card].base_addr;
3618
3619 if (cy_card[card].num_chips != -1) {
3620 return -EINVAL;
3621 }
3622
3623 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3624 if (ISZLOADED(cy_card[card])) {
3625 zfw_ctrl = cy_card[card].base_addr +
3626 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3627 board_ctrl = &zfw_ctrl->board_ctrl;
3628 ch_ctrl = zfw_ctrl->ch_ctrl;
3629 lstatus = readl(&ch_ctrl[channel].rs_status);
3630 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3631 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3632 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3633 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3634 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3635 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3636 } else {
3637 result = 0;
3638 return -ENODEV;
3639 }
3640
3641 }
3642 return result;
3643 } /* cy_tiomget */
3644
3645 static int
3646 cy_tiocmset(struct tty_struct *tty, struct file *file,
3647 unsigned int set, unsigned int clear)
3648 {
3649 struct cyclades_port *info = tty->driver_data;
3650 int card, chip, channel, index;
3651 void __iomem *base_addr;
3652 unsigned long flags;
3653 struct FIRM_ID __iomem *firm_id;
3654 struct ZFW_CTRL __iomem *zfw_ctrl;
3655 struct BOARD_CTRL __iomem *board_ctrl;
3656 struct CH_CTRL __iomem *ch_ctrl;
3657 int retval;
3658
3659 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3660 return -ENODEV;
3661
3662 card = info->card;
3663 channel = (info->line) - (cy_card[card].first_line);
3664 if (!IS_CYC_Z(cy_card[card])) {
3665 chip = channel >> 2;
3666 channel &= 0x03;
3667 index = cy_card[card].bus_index;
3668 base_addr =
3669 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3670
3671 if (set & TIOCM_RTS) {
3672 CY_LOCK(info, flags);
3673 cy_writeb(base_addr + (CyCAR << index),
3674 (u_char) channel);
3675 if (info->rtsdtr_inv) {
3676 cy_writeb(base_addr + (CyMSVR2 << index),
3677 CyDTR);
3678 } else {
3679 cy_writeb(base_addr + (CyMSVR1 << index),
3680 CyRTS);
3681 }
3682 CY_UNLOCK(info, flags);
3683 }
3684 if (clear & TIOCM_RTS) {
3685 CY_LOCK(info, flags);
3686 cy_writeb(base_addr + (CyCAR << index),
3687 (u_char) channel);
3688 if (info->rtsdtr_inv) {
3689 cy_writeb(base_addr + (CyMSVR2 << index),
3690 ~CyDTR);
3691 } else {
3692 cy_writeb(base_addr + (CyMSVR1 << index),
3693 ~CyRTS);
3694 }
3695 CY_UNLOCK(info, flags);
3696 }
3697 if (set & TIOCM_DTR) {
3698 CY_LOCK(info, flags);
3699 cy_writeb(base_addr + (CyCAR << index),
3700 (u_char) channel);
3701 if (info->rtsdtr_inv) {
3702 cy_writeb(base_addr + (CyMSVR1 << index),
3703 CyRTS);
3704 } else {
3705 cy_writeb(base_addr + (CyMSVR2 << index),
3706 CyDTR);
3707 }
3708 #ifdef CY_DEBUG_DTR
3709 printk("cyc:set_modem_info raising DTR\n");
3710 printk(" status: 0x%x, 0x%x\n",
3711 readb(base_addr + (CyMSVR1 << index)),
3712 readb(base_addr + (CyMSVR2 << index)));
3713 #endif
3714 CY_UNLOCK(info, flags);
3715 }
3716 if (clear & TIOCM_DTR) {
3717 CY_LOCK(info, flags);
3718 cy_writeb(base_addr + (CyCAR << index),
3719 (u_char) channel);
3720 if (info->rtsdtr_inv) {
3721 cy_writeb(base_addr + (CyMSVR1 << index),
3722 ~CyRTS);
3723 } else {
3724 cy_writeb(base_addr + (CyMSVR2 << index),
3725 ~CyDTR);
3726 }
3727
3728 #ifdef CY_DEBUG_DTR
3729 printk("cyc:set_modem_info dropping DTR\n");
3730 printk(" status: 0x%x, 0x%x\n",
3731 readb(base_addr + (CyMSVR1 << index)),
3732 readb(base_addr + (CyMSVR2 << index)));
3733 #endif
3734 CY_UNLOCK(info, flags);
3735 }
3736 } else {
3737 base_addr = cy_card[card].base_addr;
3738
3739 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3740 if (ISZLOADED(cy_card[card])) {
3741 zfw_ctrl = cy_card[card].base_addr +
3742 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3743 board_ctrl = &zfw_ctrl->board_ctrl;
3744 ch_ctrl = zfw_ctrl->ch_ctrl;
3745
3746 if (set & TIOCM_RTS) {
3747 CY_LOCK(info, flags);
3748 cy_writel(&ch_ctrl[channel].rs_control,
3749 readl(&ch_ctrl[channel].rs_control) |
3750 C_RS_RTS);
3751 CY_UNLOCK(info, flags);
3752 }
3753 if (clear & TIOCM_RTS) {
3754 CY_LOCK(info, flags);
3755 cy_writel(&ch_ctrl[channel].rs_control,
3756 readl(&ch_ctrl[channel].rs_control) &
3757 ~C_RS_RTS);
3758 CY_UNLOCK(info, flags);
3759 }
3760 if (set & TIOCM_DTR) {
3761 CY_LOCK(info, flags);
3762 cy_writel(&ch_ctrl[channel].rs_control,
3763 readl(&ch_ctrl[channel].rs_control) |
3764 C_RS_DTR);
3765 #ifdef CY_DEBUG_DTR
3766 printk("cyc:set_modem_info raising Z DTR\n");
3767 #endif
3768 CY_UNLOCK(info, flags);
3769 }
3770 if (clear & TIOCM_DTR) {
3771 CY_LOCK(info, flags);
3772 cy_writel(&ch_ctrl[channel].rs_control,
3773 readl(&ch_ctrl[channel].rs_control) &
3774 ~C_RS_DTR);
3775 #ifdef CY_DEBUG_DTR
3776 printk("cyc:set_modem_info clearing Z DTR\n");
3777 #endif
3778 CY_UNLOCK(info, flags);
3779 }
3780 } else {
3781 return -ENODEV;
3782 }
3783 CY_LOCK(info, flags);
3784 retval = cyz_issue_cmd(&cy_card[info->card],
3785 channel, C_CM_IOCTLM, 0L);
3786 if (retval != 0) {
3787 printk("cyc:set_modem_info retval on ttyC%d was %x\n",
3788 info->line, retval);
3789 }
3790 CY_UNLOCK(info, flags);
3791 }
3792 return 0;
3793 } /* cy_tiocmset */
3794
3795 /*
3796 * cy_break() --- routine which turns the break handling on or off
3797 */
3798 static void cy_break(struct tty_struct *tty, int break_state)
3799 {
3800 struct cyclades_port *info = tty->driver_data;
3801 unsigned long flags;
3802
3803 if (serial_paranoia_check(info, tty->name, "cy_break"))
3804 return;
3805
3806 CY_LOCK(info, flags);
3807 if (!IS_CYC_Z(cy_card[info->card])) {
3808 /* Let the transmit ISR take care of this (since it
3809 requires stuffing characters into the output stream).
3810 */
3811 if (break_state == -1) {
3812 if (!info->breakon) {
3813 info->breakon = 1;
3814 if (!info->xmit_cnt) {
3815 CY_UNLOCK(info, flags);
3816 start_xmit(info);
3817 CY_LOCK(info, flags);
3818 }
3819 }
3820 } else {
3821 if (!info->breakoff) {
3822 info->breakoff = 1;
3823 if (!info->xmit_cnt) {
3824 CY_UNLOCK(info, flags);
3825 start_xmit(info);
3826 CY_LOCK(info, flags);
3827 }
3828 }
3829 }
3830 } else {
3831 int retval;
3832
3833 if (break_state == -1) {
3834 retval = cyz_issue_cmd(&cy_card[info->card],
3835 info->line - cy_card[info->card].first_line,
3836 C_CM_SET_BREAK, 0L);
3837 if (retval != 0) {
3838 printk("cyc:cy_break (set) retval on ttyC%d "
3839 "was %x\n", info->line, retval);
3840 }
3841 } else {
3842 retval = cyz_issue_cmd(&cy_card[info->card],
3843 info->line - cy_card[info->card].first_line,
3844 C_CM_CLR_BREAK, 0L);
3845 if (retval != 0) {
3846 printk("cyc:cy_break (clr) retval on ttyC%d "
3847 "was %x\n", info->line, retval);
3848 }
3849 }
3850 }
3851 CY_UNLOCK(info, flags);
3852 } /* cy_break */
3853
3854 static int
3855 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3856 {
3857
3858 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3859 return -EFAULT;
3860 info->mon.int_count = 0;
3861 info->mon.char_count = 0;
3862 info->mon.char_max = 0;
3863 info->mon.char_last = 0;
3864 return 0;
3865 } /* get_mon_info */
3866
3867 static int set_threshold(struct cyclades_port *info, unsigned long value)
3868 {
3869 void __iomem *base_addr;
3870 int card, channel, chip, index;
3871 unsigned long flags;
3872
3873 card = info->card;
3874 channel = info->line - cy_card[card].first_line;
3875 if (!IS_CYC_Z(cy_card[card])) {
3876 chip = channel >> 2;
3877 channel &= 0x03;
3878 index = cy_card[card].bus_index;
3879 base_addr =
3880 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3881
3882 info->cor3 &= ~CyREC_FIFO;
3883 info->cor3 |= value & CyREC_FIFO;
3884
3885 CY_LOCK(info, flags);
3886 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3887 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3888 CY_UNLOCK(info, flags);
3889 } else {
3890 /* Nothing to do! */
3891 }
3892 return 0;
3893 } /* set_threshold */
3894
3895 static int
3896 get_threshold(struct cyclades_port *info, unsigned long __user * value)
3897 {
3898 void __iomem *base_addr;
3899 int card, channel, chip, index;
3900 unsigned long tmp;
3901
3902 card = info->card;
3903 channel = info->line - cy_card[card].first_line;
3904 if (!IS_CYC_Z(cy_card[card])) {
3905 chip = channel >> 2;
3906 channel &= 0x03;
3907 index = cy_card[card].bus_index;
3908 base_addr =
3909 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3910
3911 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3912 return put_user(tmp, value);
3913 } else {
3914 /* Nothing to do! */
3915 return 0;
3916 }
3917 } /* get_threshold */
3918
3919 static int
3920 set_default_threshold(struct cyclades_port *info, unsigned long value)
3921 {
3922 info->default_threshold = value & 0x0f;
3923 return 0;
3924 } /* set_default_threshold */
3925
3926 static int
3927 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3928 {
3929 return put_user(info->default_threshold, value);
3930 } /* get_default_threshold */
3931
3932 static int set_timeout(struct cyclades_port *info, unsigned long value)
3933 {
3934 void __iomem *base_addr;
3935 int card, channel, chip, index;
3936 unsigned long flags;
3937
3938 card = info->card;
3939 channel = info->line - cy_card[card].first_line;
3940 if (!IS_CYC_Z(cy_card[card])) {
3941 chip = channel >> 2;
3942 channel &= 0x03;
3943 index = cy_card[card].bus_index;
3944 base_addr =
3945 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3946
3947 CY_LOCK(info, flags);
3948 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3949 CY_UNLOCK(info, flags);
3950 } else {
3951 /* Nothing to do! */
3952 }
3953 return 0;
3954 } /* set_timeout */
3955
3956 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3957 {
3958 void __iomem *base_addr;
3959 int card, channel, chip, index;
3960 unsigned long tmp;
3961
3962 card = info->card;
3963 channel = info->line - cy_card[card].first_line;
3964 if (!IS_CYC_Z(cy_card[card])) {
3965 chip = channel >> 2;
3966 channel &= 0x03;
3967 index = cy_card[card].bus_index;
3968 base_addr =
3969 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3970
3971 tmp = readb(base_addr + (CyRTPR << index));
3972 return put_user(tmp, value);
3973 } else {
3974 /* Nothing to do! */
3975 return 0;
3976 }
3977 } /* get_timeout */
3978
3979 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3980 {
3981 info->default_timeout = value & 0xff;
3982 return 0;
3983 } /* set_default_timeout */
3984
3985 static int
3986 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
3987 {
3988 return put_user(info->default_timeout, value);
3989 } /* get_default_timeout */
3990
3991 /*
3992 * This routine allows the tty driver to implement device-
3993 * specific ioctl's. If the ioctl number passed in cmd is
3994 * not recognized by the driver, it should return ENOIOCTLCMD.
3995 */
3996 static int
3997 cy_ioctl(struct tty_struct *tty, struct file *file,
3998 unsigned int cmd, unsigned long arg)
3999 {
4000 struct cyclades_port *info = tty->driver_data;
4001 struct cyclades_icount cprev, cnow; /* kernel counter temps */
4002 struct serial_icounter_struct __user *p_cuser; /* user space */
4003 int ret_val = 0;
4004 unsigned long flags;
4005 void __user *argp = (void __user *)arg;
4006
4007 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
4008 return -ENODEV;
4009
4010 #ifdef CY_DEBUG_OTHER
4011 printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", info->line, cmd, arg); /* */
4012 #endif
4013
4014 switch (cmd) {
4015 case CYGETMON:
4016 ret_val = get_mon_info(info, argp);
4017 break;
4018 case CYGETTHRESH:
4019 ret_val = get_threshold(info, argp);
4020 break;
4021 case CYSETTHRESH:
4022 ret_val = set_threshold(info, arg);
4023 break;
4024 case CYGETDEFTHRESH:
4025 ret_val = get_default_threshold(info, argp);
4026 break;
4027 case CYSETDEFTHRESH:
4028 ret_val = set_default_threshold(info, arg);
4029 break;
4030 case CYGETTIMEOUT:
4031 ret_val = get_timeout(info, argp);
4032 break;
4033 case CYSETTIMEOUT:
4034 ret_val = set_timeout(info, arg);
4035 break;
4036 case CYGETDEFTIMEOUT:
4037 ret_val = get_default_timeout(info, argp);
4038 break;
4039 case CYSETDEFTIMEOUT:
4040 ret_val = set_default_timeout(info, arg);
4041 break;
4042 case CYSETRFLOW:
4043 info->rflow = (int)arg;
4044 ret_val = 0;
4045 break;
4046 case CYGETRFLOW:
4047 ret_val = info->rflow;
4048 break;
4049 case CYSETRTSDTR_INV:
4050 info->rtsdtr_inv = (int)arg;
4051 ret_val = 0;
4052 break;
4053 case CYGETRTSDTR_INV:
4054 ret_val = info->rtsdtr_inv;
4055 break;
4056 case CYGETCARDINFO:
4057 if (copy_to_user(argp, &cy_card[info->card],
4058 sizeof(struct cyclades_card))) {
4059 ret_val = -EFAULT;
4060 break;
4061 }
4062 ret_val = 0;
4063 break;
4064 case CYGETCD1400VER:
4065 ret_val = info->chip_rev;
4066 break;
4067 #ifndef CONFIG_CYZ_INTR
4068 case CYZSETPOLLCYCLE:
4069 cyz_polling_cycle = (arg * HZ) / 1000;
4070 ret_val = 0;
4071 break;
4072 case CYZGETPOLLCYCLE:
4073 ret_val = (cyz_polling_cycle * 1000) / HZ;
4074 break;
4075 #endif /* CONFIG_CYZ_INTR */
4076 case CYSETWAIT:
4077 info->closing_wait = (unsigned short)arg *HZ / 100;
4078 ret_val = 0;
4079 break;
4080 case CYGETWAIT:
4081 ret_val = info->closing_wait / (HZ / 100);
4082 break;
4083 case TIOCGSERIAL:
4084 ret_val = get_serial_info(info, argp);
4085 break;
4086 case TIOCSSERIAL:
4087 ret_val = set_serial_info(info, argp);
4088 break;
4089 case TIOCSERGETLSR: /* Get line status register */
4090 ret_val = get_lsr_info(info, argp);
4091 break;
4092 /*
4093 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4094 * - mask passed in arg for lines of interest
4095 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4096 * Caller should use TIOCGICOUNT to see which one it was
4097 */
4098 case TIOCMIWAIT:
4099 CY_LOCK(info, flags);
4100 /* note the counters on entry */
4101 cprev = info->icount;
4102 CY_UNLOCK(info, flags);
4103 while (1) {
4104 interruptible_sleep_on(&info->delta_msr_wait);
4105 /* see if a signal did it */
4106 if (signal_pending(current)) {
4107 return -ERESTARTSYS;
4108 }
4109
4110 CY_LOCK(info, flags);
4111 cnow = info->icount; /* atomic copy */
4112 CY_UNLOCK(info, flags);
4113
4114 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
4115 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
4116 return -EIO; /* no change => error */
4117 }
4118 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4119 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4120 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4121 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
4122 return 0;
4123 }
4124 cprev = cnow;
4125 }
4126 /* NOTREACHED */
4127
4128 /*
4129 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4130 * Return: write counters to the user passed counter struct
4131 * NB: both 1->0 and 0->1 transitions are counted except for
4132 * RI where only 0->1 is counted.
4133 */
4134 case TIOCGICOUNT:
4135 CY_LOCK(info, flags);
4136 cnow = info->icount;
4137 CY_UNLOCK(info, flags);
4138 p_cuser = argp;
4139 ret_val = put_user(cnow.cts, &p_cuser->cts);
4140 if (ret_val)
4141 return ret_val;
4142 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4143 if (ret_val)
4144 return ret_val;
4145 ret_val = put_user(cnow.rng, &p_cuser->rng);
4146 if (ret_val)
4147 return ret_val;
4148 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4149 if (ret_val)
4150 return ret_val;
4151 ret_val = put_user(cnow.rx, &p_cuser->rx);
4152 if (ret_val)
4153 return ret_val;
4154 ret_val = put_user(cnow.tx, &p_cuser->tx);
4155 if (ret_val)
4156 return ret_val;
4157 ret_val = put_user(cnow.frame, &p_cuser->frame);
4158 if (ret_val)
4159 return ret_val;
4160 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4161 if (ret_val)
4162 return ret_val;
4163 ret_val = put_user(cnow.parity, &p_cuser->parity);
4164 if (ret_val)
4165 return ret_val;
4166 ret_val = put_user(cnow.brk, &p_cuser->brk);
4167 if (ret_val)
4168 return ret_val;
4169 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4170 if (ret_val)
4171 return ret_val;
4172 ret_val = 0;
4173 break;
4174 default:
4175 ret_val = -ENOIOCTLCMD;
4176 }
4177
4178 #ifdef CY_DEBUG_OTHER
4179 printk(" cyc:cy_ioctl done\n");
4180 #endif
4181
4182 return ret_val;
4183 } /* cy_ioctl */
4184
4185 /*
4186 * This routine allows the tty driver to be notified when
4187 * device's termios settings have changed. Note that a
4188 * well-designed tty driver should be prepared to accept the case
4189 * where old == NULL, and try to do something rational.
4190 */
4191 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4192 {
4193 struct cyclades_port *info = tty->driver_data;
4194
4195 #ifdef CY_DEBUG_OTHER
4196 printk("cyc:cy_set_termios ttyC%d\n", info->line);
4197 #endif
4198
4199 if (tty->termios->c_cflag == old_termios->c_cflag &&
4200 (tty->termios->c_iflag & (IXON | IXANY)) ==
4201 (old_termios->c_iflag & (IXON | IXANY)))
4202 return;
4203 set_line_char(info);
4204
4205 if ((old_termios->c_cflag & CRTSCTS) &&
4206 !(tty->termios->c_cflag & CRTSCTS)) {
4207 tty->hw_stopped = 0;
4208 cy_start(tty);
4209 }
4210 #if 0
4211 /*
4212 * No need to wake up processes in open wait, since they
4213 * sample the CLOCAL flag once, and don't recheck it.
4214 * XXX It's not clear whether the current behavior is correct
4215 * or not. Hence, this may change.....
4216 */
4217 if (!(old_termios->c_cflag & CLOCAL) &&
4218 (tty->termios->c_cflag & CLOCAL))
4219 wake_up_interruptible(&info->open_wait);
4220 #endif
4221 } /* cy_set_termios */
4222
4223 /* This function is used to send a high-priority XON/XOFF character to
4224 the device.
4225 */
4226 static void cy_send_xchar(struct tty_struct *tty, char ch)
4227 {
4228 struct cyclades_port *info = tty->driver_data;
4229 int card, channel;
4230
4231 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4232 return;
4233
4234 info->x_char = ch;
4235
4236 if (ch)
4237 cy_start(tty);
4238
4239 card = info->card;
4240 channel = info->line - cy_card[card].first_line;
4241
4242 if (IS_CYC_Z(cy_card[card])) {
4243 if (ch == STOP_CHAR(tty))
4244 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXOFF,
4245 0L);
4246 else if (ch == START_CHAR(tty))
4247 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXON,
4248 0L);
4249 }
4250 }
4251
4252 /* This routine is called by the upper-layer tty layer to signal
4253 that incoming characters should be throttled because the input
4254 buffers are close to full.
4255 */
4256 static void cy_throttle(struct tty_struct *tty)
4257 {
4258 struct cyclades_port *info = tty->driver_data;
4259 unsigned long flags;
4260 void __iomem *base_addr;
4261 int card, chip, channel, index;
4262
4263 #ifdef CY_DEBUG_THROTTLE
4264 char buf[64];
4265
4266 printk("cyc:throttle %s: %d....ttyC%d\n", tty_name(tty, buf),
4267 tty->ldisc.chars_in_buffer(tty), info->line);
4268 #endif
4269
4270 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4271 return;
4272 }
4273
4274 card = info->card;
4275
4276 if (I_IXOFF(tty)) {
4277 if (!IS_CYC_Z(cy_card[card]))
4278 cy_send_xchar(tty, STOP_CHAR(tty));
4279 else
4280 info->throttle = 1;
4281 }
4282
4283 if (tty->termios->c_cflag & CRTSCTS) {
4284 channel = info->line - cy_card[card].first_line;
4285 if (!IS_CYC_Z(cy_card[card])) {
4286 chip = channel >> 2;
4287 channel &= 0x03;
4288 index = cy_card[card].bus_index;
4289 base_addr = cy_card[card].base_addr +
4290 (cy_chip_offset[chip] << index);
4291
4292 CY_LOCK(info, flags);
4293 cy_writeb(base_addr + (CyCAR << index),
4294 (u_char) channel);
4295 if (info->rtsdtr_inv) {
4296 cy_writeb(base_addr + (CyMSVR2 << index),
4297 ~CyDTR);
4298 } else {
4299 cy_writeb(base_addr + (CyMSVR1 << index),
4300 ~CyRTS);
4301 }
4302 CY_UNLOCK(info, flags);
4303 } else {
4304 info->throttle = 1;
4305 }
4306 }
4307 } /* cy_throttle */
4308
4309 /*
4310 * This routine notifies the tty driver that it should signal
4311 * that characters can now be sent to the tty without fear of
4312 * overrunning the input buffers of the line disciplines.
4313 */
4314 static void cy_unthrottle(struct tty_struct *tty)
4315 {
4316 struct cyclades_port *info = tty->driver_data;
4317 unsigned long flags;
4318 void __iomem *base_addr;
4319 int card, chip, channel, index;
4320
4321 #ifdef CY_DEBUG_THROTTLE
4322 char buf[64];
4323
4324 printk("cyc:unthrottle %s: %d....ttyC%d\n", tty_name(tty, buf),
4325 tty->ldisc.chars_in_buffer(tty), info->line);
4326 #endif
4327
4328 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4329 return;
4330 }
4331
4332 if (I_IXOFF(tty)) {
4333 if (info->x_char)
4334 info->x_char = 0;
4335 else
4336 cy_send_xchar(tty, START_CHAR(tty));
4337 }
4338
4339 if (tty->termios->c_cflag & CRTSCTS) {
4340 card = info->card;
4341 channel = info->line - cy_card[card].first_line;
4342 if (!IS_CYC_Z(cy_card[card])) {
4343 chip = channel >> 2;
4344 channel &= 0x03;
4345 index = cy_card[card].bus_index;
4346 base_addr = cy_card[card].base_addr +
4347 (cy_chip_offset[chip] << index);
4348
4349 CY_LOCK(info, flags);
4350 cy_writeb(base_addr + (CyCAR << index),
4351 (u_char) channel);
4352 if (info->rtsdtr_inv) {
4353 cy_writeb(base_addr + (CyMSVR2 << index),
4354 CyDTR);
4355 } else {
4356 cy_writeb(base_addr + (CyMSVR1 << index),
4357 CyRTS);
4358 }
4359 CY_UNLOCK(info, flags);
4360 } else {
4361 info->throttle = 0;
4362 }
4363 }
4364 } /* cy_unthrottle */
4365
4366 /* cy_start and cy_stop provide software output flow control as a
4367 function of XON/XOFF, software CTS, and other such stuff.
4368 */
4369 static void cy_stop(struct tty_struct *tty)
4370 {
4371 struct cyclades_card *cinfo;
4372 struct cyclades_port *info = tty->driver_data;
4373 void __iomem *base_addr;
4374 int chip, channel, index;
4375 unsigned long flags;
4376
4377 #ifdef CY_DEBUG_OTHER
4378 printk("cyc:cy_stop ttyC%d\n", info->line); /* */
4379 #endif
4380
4381 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4382 return;
4383
4384 cinfo = &cy_card[info->card];
4385 channel = info->line - cinfo->first_line;
4386 if (!IS_CYC_Z(*cinfo)) {
4387 index = cinfo->bus_index;
4388 chip = channel >> 2;
4389 channel &= 0x03;
4390 base_addr = cy_card[info->card].base_addr +
4391 (cy_chip_offset[chip] << index);
4392
4393 CY_LOCK(info, flags);
4394 cy_writeb(base_addr + (CyCAR << index),
4395 (u_char)(channel & 0x0003)); /* index channel */
4396 cy_writeb(base_addr + (CySRER << index),
4397 readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4398 CY_UNLOCK(info, flags);
4399 } else {
4400 /* Nothing to do! */
4401 }
4402 } /* cy_stop */
4403
4404 static void cy_start(struct tty_struct *tty)
4405 {
4406 struct cyclades_card *cinfo;
4407 struct cyclades_port *info = tty->driver_data;
4408 void __iomem *base_addr;
4409 int chip, channel, index;
4410 unsigned long flags;
4411
4412 #ifdef CY_DEBUG_OTHER
4413 printk("cyc:cy_start ttyC%d\n", info->line); /* */
4414 #endif
4415
4416 if (serial_paranoia_check(info, tty->name, "cy_start"))
4417 return;
4418
4419 cinfo = &cy_card[info->card];
4420 channel = info->line - cinfo->first_line;
4421 index = cinfo->bus_index;
4422 if (!IS_CYC_Z(*cinfo)) {
4423 chip = channel >> 2;
4424 channel &= 0x03;
4425 base_addr = cy_card[info->card].base_addr +
4426 (cy_chip_offset[chip] << index);
4427
4428 CY_LOCK(info, flags);
4429 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4430 cy_writeb(base_addr + (CySRER << index),
4431 readb(base_addr + (CySRER << index)) | CyTxRdy);
4432 CY_UNLOCK(info, flags);
4433 } else {
4434 /* Nothing to do! */
4435 }
4436 } /* cy_start */
4437
4438 static void cy_flush_buffer(struct tty_struct *tty)
4439 {
4440 struct cyclades_port *info = tty->driver_data;
4441 int card, channel, retval;
4442 unsigned long flags;
4443
4444 #ifdef CY_DEBUG_IO
4445 printk("cyc:cy_flush_buffer ttyC%d\n", info->line); /* */
4446 #endif
4447
4448 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4449 return;
4450
4451 card = info->card;
4452 channel = (info->line) - (cy_card[card].first_line);
4453
4454 CY_LOCK(info, flags);
4455 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4456 CY_UNLOCK(info, flags);
4457
4458 if (IS_CYC_Z(cy_card[card])) { /* If it is a Z card, flush the on-board
4459 buffers as well */
4460 CY_LOCK(info, flags);
4461 retval =
4462 cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
4463 if (retval != 0) {
4464 printk("cyc: flush_buffer retval on ttyC%d was %x\n",
4465 info->line, retval);
4466 }
4467 CY_UNLOCK(info, flags);
4468 }
4469 tty_wakeup(tty);
4470 } /* cy_flush_buffer */
4471
4472 /*
4473 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4474 */
4475 static void cy_hangup(struct tty_struct *tty)
4476 {
4477 struct cyclades_port *info = tty->driver_data;
4478
4479 #ifdef CY_DEBUG_OTHER
4480 printk("cyc:cy_hangup ttyC%d\n", info->line); /* */
4481 #endif
4482
4483 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4484 return;
4485
4486 cy_flush_buffer(tty);
4487 shutdown(info);
4488 info->event = 0;
4489 info->count = 0;
4490 #ifdef CY_DEBUG_COUNT
4491 printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
4492 #endif
4493 info->tty = NULL;
4494 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4495 wake_up_interruptible(&info->open_wait);
4496 } /* cy_hangup */
4497
4498 /*
4499 * ---------------------------------------------------------------------
4500 * cy_init() and friends
4501 *
4502 * cy_init() is called at boot-time to initialize the serial driver.
4503 * ---------------------------------------------------------------------
4504 */
4505
4506 /* initialize chips on Cyclom-Y card -- return number of valid
4507 chips (which is number of ports/4) */
4508 static unsigned short __init
4509 cyy_init_card(void __iomem * true_base_addr, int index)
4510 {
4511 unsigned int chip_number;
4512 void __iomem *base_addr;
4513
4514 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4515 /* Cy_HwReset is 0x1400 */
4516 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4517 /* Cy_ClrIntr is 0x1800 */
4518 udelay(500L);
4519
4520 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4521 base_addr =
4522 true_base_addr + (cy_chip_offset[chip_number] << index);
4523 mdelay(1);
4524 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4525 /*************
4526 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4527 chip_number, (unsigned long)base_addr);
4528 *************/
4529 return chip_number;
4530 }
4531
4532 cy_writeb(base_addr + (CyGFRCR << index), 0);
4533 udelay(10L);
4534
4535 /* The Cyclom-16Y does not decode address bit 9 and therefore
4536 cannot distinguish between references to chip 0 and a non-
4537 existent chip 4. If the preceding clearing of the supposed
4538 chip 4 GFRCR register appears at chip 0, there is no chip 4
4539 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4540 */
4541 if (chip_number == 4 && readb(true_base_addr +
4542 (cy_chip_offset[0] << index) +
4543 (CyGFRCR << index)) == 0) {
4544 return chip_number;
4545 }
4546
4547 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4548 mdelay(1);
4549
4550 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4551 /*
4552 printk(" chip #%d at %#6lx is not responding ",
4553 chip_number, (unsigned long)base_addr);
4554 printk("(GFRCR stayed 0)\n",
4555 */
4556 return chip_number;
4557 }
4558 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4559 0x40) {
4560 /*
4561 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4562 "%#2x)\n",
4563 chip_number, (unsigned long)base_addr,
4564 base_addr[CyGFRCR<<index]);
4565 */
4566 return chip_number;
4567 }
4568 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4569 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4570 /* It is a CD1400 rev. J or later */
4571 /* Impossible to reach 5ms with this chip.
4572 Changed to 2ms instead (f = 500 Hz). */
4573 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4574 } else {
4575 /* f = 200 Hz */
4576 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4577 }
4578
4579 /*
4580 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4581 chip_number, (unsigned long)base_addr,
4582 readb(base_addr+(CyGFRCR<<index)));
4583 */
4584 }
4585 return chip_number;
4586 } /* cyy_init_card */
4587
4588 /*
4589 * ---------------------------------------------------------------------
4590 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4591 * sets global variables and return the number of ISA boards found.
4592 * ---------------------------------------------------------------------
4593 */
4594 static int __init cy_detect_isa(void)
4595 {
4596 #ifdef CONFIG_ISA
4597 unsigned short cy_isa_irq, nboard;
4598 void __iomem *cy_isa_address;
4599 unsigned short i, j, cy_isa_nchan;
4600 #ifdef MODULE
4601 int isparam = 0;
4602 #endif
4603
4604 nboard = 0;
4605
4606 #ifdef MODULE
4607 /* Check for module parameters */
4608 for (i = 0; i < NR_CARDS; i++) {
4609 if (maddr[i] || i) {
4610 isparam = 1;
4611 cy_isa_addresses[i] = maddr[i];
4612 }
4613 if (!maddr[i])
4614 break;
4615 }
4616 #endif
4617
4618 /* scan the address table probing for Cyclom-Y/ISA boards */
4619 for (i = 0; i < NR_ISA_ADDRS; i++) {
4620 unsigned int isa_address = cy_isa_addresses[i];
4621 if (isa_address == 0x0000) {
4622 return nboard;
4623 }
4624
4625 /* probe for CD1400... */
4626 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4627 cy_isa_nchan = CyPORTS_PER_CHIP *
4628 cyy_init_card(cy_isa_address, 0);
4629 if (cy_isa_nchan == 0) {
4630 continue;
4631 }
4632 #ifdef MODULE
4633 if (isparam && irq[i])
4634 cy_isa_irq = irq[i];
4635 else
4636 #endif
4637 /* find out the board's irq by probing */
4638 cy_isa_irq = detect_isa_irq(cy_isa_address);
4639 if (cy_isa_irq == 0) {
4640 printk("Cyclom-Y/ISA found at 0x%lx ",
4641 (unsigned long)cy_isa_address);
4642 printk("but the IRQ could not be detected.\n");
4643 continue;
4644 }
4645
4646 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4647 printk("Cyclom-Y/ISA found at 0x%lx ",
4648 (unsigned long)cy_isa_address);
4649 printk("but no more channels are available.\n");
4650 printk("Change NR_PORTS in cyclades.c and recompile "
4651 "kernel.\n");
4652 return nboard;
4653 }
4654 /* fill the next cy_card structure available */
4655 for (j = 0; j < NR_CARDS; j++) {
4656 if (cy_card[j].base_addr == 0)
4657 break;
4658 }
4659 if (j == NR_CARDS) { /* no more cy_cards available */
4660 printk("Cyclom-Y/ISA found at 0x%lx ",
4661 (unsigned long)cy_isa_address);
4662 printk("but no more cards can be used .\n");
4663 printk("Change NR_CARDS in cyclades.c and recompile "
4664 "kernel.\n");
4665 return nboard;
4666 }
4667
4668 /* allocate IRQ */
4669 if (request_irq(cy_isa_irq, cyy_interrupt,
4670 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4671 printk("Cyclom-Y/ISA found at 0x%lx ",
4672 (unsigned long)cy_isa_address);
4673 printk("but could not allocate IRQ#%d.\n", cy_isa_irq);
4674 return nboard;
4675 }
4676
4677 /* set cy_card */
4678 cy_card[j].base_addr = cy_isa_address;
4679 cy_card[j].ctl_addr = NULL;
4680 cy_card[j].irq = (int)cy_isa_irq;
4681 cy_card[j].bus_index = 0;
4682 cy_card[j].first_line = cy_next_channel;
4683 cy_card[j].num_chips = cy_isa_nchan / 4;
4684 nboard++;
4685
4686 /* print message */
4687 printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
4688 j + 1, (unsigned long)cy_isa_address,
4689 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4690 cy_isa_irq);
4691 printk("%d channels starting from port %d.\n",
4692 cy_isa_nchan, cy_next_channel);
4693 cy_next_channel += cy_isa_nchan;
4694 }
4695 return nboard;
4696 #else
4697 return 0;
4698 #endif /* CONFIG_ISA */
4699 } /* cy_detect_isa */
4700
4701 static void plx_init(void __iomem * addr, __u32 initctl)
4702 {
4703 /* Reset PLX */
4704 cy_writel(addr + initctl, readl(addr + initctl) | 0x40000000);
4705 udelay(100L);
4706 cy_writel(addr + initctl, readl(addr + initctl) & ~0x40000000);
4707
4708 /* Reload Config. Registers from EEPROM */
4709 cy_writel(addr + initctl, readl(addr + initctl) | 0x20000000);
4710 udelay(100L);
4711 cy_writel(addr + initctl, readl(addr + initctl) & ~0x20000000);
4712 }
4713
4714 static int __devinit cy_init_Ze(unsigned long cy_pci_phys0,
4715 unsigned long cy_pci_phys2,
4716 struct RUNTIME_9060 __iomem *cy_pci_addr0,
4717 void __iomem *cy_pci_addr2, int cy_pci_irq,
4718 struct pci_dev *pdev)
4719 {
4720 unsigned int j;
4721 unsigned short cy_pci_nchan;
4722
4723 readl(&cy_pci_addr0->mail_box_0);
4724 #ifdef CY_PCI_DEBUG
4725 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
4726 (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
4727 printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not "
4728 "loaded\n");
4729 #endif
4730 /* This must be the new Cyclades-Ze/PCI. */
4731 cy_pci_nchan = ZE_V1_NPORTS;
4732
4733 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4734 printk("Cyclades-Ze/PCI found at 0x%lx but no channels "
4735 "are available.\nChange NR_PORTS in cyclades.c "
4736 "and recompile kernel.\n",
4737 (ulong) cy_pci_phys2);
4738 return -EIO;
4739 }
4740
4741 /* fill the next cy_card structure available */
4742 for (j = 0; j < NR_CARDS; j++) {
4743 if (cy_card[j].base_addr == 0)
4744 break;
4745 }
4746 if (j == NR_CARDS) { /* no more cy_cards available */
4747 printk("Cyclades-Ze/PCI found at 0x%lx but no more "
4748 "cards can be used.\nChange NR_CARDS in "
4749 "cyclades.c and recompile kernel.\n",
4750 (ulong) cy_pci_phys2);
4751 return -EIO;
4752 }
4753 #ifdef CONFIG_CYZ_INTR
4754 /* allocate IRQ only if board has an IRQ */
4755 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
4756 if (request_irq(cy_pci_irq, cyz_interrupt,
4757 IRQF_SHARED, "Cyclades-Z",
4758 &cy_card[j])) {
4759 printk("Cyclom-Ze/PCI found at 0x%lx ",
4760 (ulong) cy_pci_phys2);
4761 printk("but could not allocate IRQ%d.\n",
4762 cy_pci_irq);
4763 return -EIO;
4764 }
4765 }
4766 #endif /* CONFIG_CYZ_INTR */
4767
4768 /* set cy_card */
4769 cy_card[j].base_phys = cy_pci_phys2;
4770 cy_card[j].ctl_phys = cy_pci_phys0;
4771 cy_card[j].base_addr = cy_pci_addr2;
4772 cy_card[j].ctl_addr = cy_pci_addr0;
4773 cy_card[j].irq = (int)cy_pci_irq;
4774 cy_card[j].bus_index = 1;
4775 cy_card[j].first_line = cy_next_channel;
4776 cy_card[j].num_chips = -1;
4777 cy_card[j].pdev = pdev;
4778
4779 /* print message */
4780 #ifdef CONFIG_CYZ_INTR
4781 /* don't report IRQ if board is no IRQ */
4782 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
4783 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4784 j + 1, (ulong) cy_pci_phys2,
4785 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1),
4786 (int)cy_pci_irq);
4787 else
4788 #endif /* CONFIG_CYZ_INTR */
4789 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
4790 j + 1, (ulong) cy_pci_phys2,
4791 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1));
4792
4793 printk("%d channels starting from port %d.\n",
4794 cy_pci_nchan, cy_next_channel);
4795 cy_next_channel += cy_pci_nchan;
4796
4797 return 0;
4798 }
4799
4800 /*
4801 * ---------------------------------------------------------------------
4802 * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
4803 * sets global variables and return the number of PCI boards found.
4804 * ---------------------------------------------------------------------
4805 */
4806 static int __init cy_detect_pci(void)
4807 {
4808 #ifdef CONFIG_PCI
4809
4810 struct pci_dev *pdev = NULL;
4811 unsigned char cyy_rev_id;
4812 unsigned char cy_pci_irq = 0;
4813 __u32 cy_pci_phys0, cy_pci_phys2;
4814 void __iomem *cy_pci_addr0, *cy_pci_addr2;
4815 unsigned short i, j, cy_pci_nchan, plx_ver;
4816 unsigned short device_id, dev_index = 0;
4817 __u32 mailbox;
4818 __u32 ZeIndex = 0;
4819 void __iomem *Ze_addr0[NR_CARDS], *Ze_addr2[NR_CARDS];
4820 __u32 Ze_phys0[NR_CARDS], Ze_phys2[NR_CARDS];
4821 unsigned char Ze_irq[NR_CARDS];
4822 struct pci_dev *Ze_pdev[NR_CARDS];
4823 int retval;
4824
4825 for (i = 0; i < NR_CARDS; i++) {
4826 /* look for a Cyclades card by vendor and device id */
4827 while ((device_id = cy_pci_dev_id[dev_index].device) != 0) {
4828 if ((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
4829 device_id, pdev)) == NULL) {
4830 dev_index++; /* try next device id */
4831 } else {
4832 break; /* found a board */
4833 }
4834 }
4835
4836 if (device_id == 0)
4837 break;
4838
4839 if (pci_enable_device(pdev))
4840 continue;
4841
4842 /* read PCI configuration area */
4843 cy_pci_irq = pdev->irq;
4844 cy_pci_phys0 = pci_resource_start(pdev, 0);
4845 cy_pci_phys2 = pci_resource_start(pdev, 2);
4846 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4847
4848 device_id &= ~PCI_DEVICE_ID_MASK;
4849
4850 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4851 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4852 #ifdef CY_PCI_DEBUG
4853 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4854 pdev->bus->number, pdev->devfn);
4855 printk("rev_id=%d) IRQ%d\n",
4856 cyy_rev_id, (int)cy_pci_irq);
4857 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
4858 "ctladdr=0x%lx\n",
4859 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4860 #endif
4861
4862 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4863 printk(" Warning: PCI I/O bit incorrectly "
4864 "set. Ignoring it...\n");
4865 pdev->resource[2].flags &= ~IORESOURCE_IO;
4866 }
4867
4868 /* Although we don't use this I/O region, we should
4869 request it from the kernel anyway, to avoid problems
4870 with other drivers accessing it. */
4871 if (pci_request_regions(pdev, "Cyclom-Y") != 0) {
4872 printk(KERN_ERR "cyclades: failed to reserve "
4873 "PCI resources\n");
4874 continue;
4875 }
4876 #if defined(__alpha__)
4877 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4878 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4879 pdev->bus->number, pdev->devfn);
4880 printk("rev_id=%d) IRQ%d\n",
4881 cyy_rev_id, (int)cy_pci_irq);
4882 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
4883 "ctladdr=0x%lx\n",
4884 (ulong)cy_pci_phys2,
4885 (ulong)cy_pci_phys0);
4886 printk("Cyclom-Y/PCI not supported for low "
4887 "addresses in Alpha systems.\n");
4888 i--;
4889 continue;
4890 }
4891 #endif
4892 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Yctl);
4893 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ywin);
4894
4895 #ifdef CY_PCI_DEBUG
4896 printk("Cyclom-Y/PCI: relocate winaddr=0x%lx "
4897 "ctladdr=0x%lx\n",
4898 (u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
4899 #endif
4900 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4901 cyy_init_card(cy_pci_addr2, 1));
4902 if (cy_pci_nchan == 0) {
4903 printk("Cyclom-Y PCI host card with ");
4904 printk("no Serial-Modules at 0x%lx.\n",
4905 (ulong) cy_pci_phys2);
4906 i--;
4907 continue;
4908 }
4909 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4910 printk("Cyclom-Y/PCI found at 0x%lx ",
4911 (ulong) cy_pci_phys2);
4912 printk("but no channels are available.\n");
4913 printk("Change NR_PORTS in cyclades.c and "
4914 "recompile kernel.\n");
4915 return i;
4916 }
4917 /* fill the next cy_card structure available */
4918 for (j = 0; j < NR_CARDS; j++) {
4919 if (cy_card[j].base_addr == 0)
4920 break;
4921 }
4922 if (j == NR_CARDS) { /* no more cy_cards available */
4923 printk("Cyclom-Y/PCI found at 0x%lx ",
4924 (ulong) cy_pci_phys2);
4925 printk("but no more cards can be used.\n");
4926 printk("Change NR_CARDS in cyclades.c and "
4927 "recompile kernel.\n");
4928 return i;
4929 }
4930
4931 /* allocate IRQ */
4932 if (request_irq(cy_pci_irq, cyy_interrupt,
4933 IRQF_SHARED, "Cyclom-Y", &cy_card[j])) {
4934 printk("Cyclom-Y/PCI found at 0x%lx ",
4935 (ulong) cy_pci_phys2);
4936 printk("but could not allocate IRQ%d.\n",
4937 cy_pci_irq);
4938 return i;
4939 }
4940
4941 /* set cy_card */
4942 cy_card[j].base_phys = (ulong) cy_pci_phys2;
4943 cy_card[j].ctl_phys = (ulong) cy_pci_phys0;
4944 cy_card[j].base_addr = cy_pci_addr2;
4945 cy_card[j].ctl_addr = cy_pci_addr0;
4946 cy_card[j].irq = (int)cy_pci_irq;
4947 cy_card[j].bus_index = 1;
4948 cy_card[j].first_line = cy_next_channel;
4949 cy_card[j].num_chips = cy_pci_nchan / 4;
4950 cy_card[j].pdev = pdev;
4951
4952 /* enable interrupts in the PCI interface */
4953 plx_ver = readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
4954 switch (plx_ver) {
4955 case PLX_9050:
4956
4957 cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
4958 break;
4959
4960 case PLX_9060:
4961 case PLX_9080:
4962 default: /* Old boards, use PLX_9060 */
4963
4964 plx_init(cy_pci_addr0, 0x6c);
4965 /* For some yet unknown reason, once the PLX9060 reloads
4966 the EEPROM, the IRQ is lost and, thus, we have to
4967 re-write it to the PCI config. registers.
4968 This will remain here until we find a permanent
4969 fix. */
4970 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4971 cy_pci_irq);
4972
4973 cy_writew(cy_pci_addr0 + 0x68,
4974 readw(cy_pci_addr0 + 0x68) | 0x0900);
4975 break;
4976 }
4977
4978 /* print message */
4979 printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4980 j + 1, (ulong)cy_pci_phys2,
4981 (ulong) (cy_pci_phys2 + CyPCI_Ywin - 1),
4982 (int)cy_pci_irq);
4983 printk("%d channels starting from port %d.\n",
4984 cy_pci_nchan, cy_next_channel);
4985
4986 cy_next_channel += cy_pci_nchan;
4987 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4988 /* print message */
4989 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4990 pdev->bus->number, pdev->devfn);
4991 printk("rev_id=%d) IRQ%d\n",
4992 cyy_rev_id, (int)cy_pci_irq);
4993 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
4994 "ctladdr=0x%lx\n",
4995 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4996 printk("Cyclades-Z/PCI not supported for low "
4997 "addresses\n");
4998 break;
4999 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
5000 #ifdef CY_PCI_DEBUG
5001 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
5002 pdev->bus->number, pdev->devfn);
5003 printk("rev_id=%d) IRQ%d\n",
5004 cyy_rev_id, (int)cy_pci_irq);
5005 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
5006 "ctladdr=0x%lx\n",
5007 (ulong) cy_pci_phys2, (ulong) cy_pci_phys0);
5008 #endif
5009 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Zctl);
5010
5011 /* Disable interrupts on the PLX before resetting it */
5012 cy_writew(cy_pci_addr0 + 0x68,
5013 readw(cy_pci_addr0 + 0x68) & ~0x0900);
5014
5015 plx_init(cy_pci_addr0, 0x6c);
5016 /* For some yet unknown reason, once the PLX9060 reloads
5017 the EEPROM, the IRQ is lost and, thus, we have to
5018 re-write it to the PCI config. registers.
5019 This will remain here until we find a permanent
5020 fix. */
5021 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
5022 cy_pci_irq);
5023
5024 mailbox = (__u32)readl(&((struct RUNTIME_9060 __iomem *)
5025 cy_pci_addr0)->mail_box_0);
5026
5027 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
5028 printk(" Warning: PCI I/O bit incorrectly "
5029 "set. Ignoring it...\n");
5030 pdev->resource[2].flags &= ~IORESOURCE_IO;
5031 }
5032
5033 /* Although we don't use this I/O region, we should
5034 request it from the kernel anyway, to avoid problems
5035 with other drivers accessing it. */
5036 if (pci_request_regions(pdev, "Cyclades-Z") != 0) {
5037 printk(KERN_ERR "cyclades: failed to reserve "
5038 "PCI resources\n");
5039 continue;
5040 }
5041
5042 if (mailbox == ZE_V1) {
5043 cy_pci_addr2 = ioremap(cy_pci_phys2,
5044 CyPCI_Ze_win);
5045 if (ZeIndex == NR_CARDS) {
5046 printk("Cyclades-Ze/PCI found at "
5047 "0x%lx but no more cards can "
5048 "be used.\nChange NR_CARDS in "
5049 "cyclades.c and recompile "
5050 "kernel.\n",
5051 (ulong)cy_pci_phys2);
5052 } else {
5053 Ze_phys0[ZeIndex] = cy_pci_phys0;
5054 Ze_phys2[ZeIndex] = cy_pci_phys2;
5055 Ze_addr0[ZeIndex] = cy_pci_addr0;
5056 Ze_addr2[ZeIndex] = cy_pci_addr2;
5057 Ze_irq[ZeIndex] = cy_pci_irq;
5058 Ze_pdev[ZeIndex] = pdev;
5059 ZeIndex++;
5060 }
5061 i--;
5062 continue;
5063 } else {
5064 cy_pci_addr2 = ioremap(cy_pci_phys2,CyPCI_Zwin);
5065 }
5066
5067 #ifdef CY_PCI_DEBUG
5068 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx "
5069 "ctladdr=0x%lx\n",
5070 (ulong) cy_pci_addr2, (ulong) cy_pci_addr0);
5071 if (mailbox == ZO_V1) {
5072 cy_writel(&((struct RUNTIME_9060 *)
5073 (cy_pci_addr0))->loc_addr_base,
5074 WIN_CREG);
5075 printk("Cyclades-8Zo/PCI: FPGA id %lx, ver "
5076 "%lx\n", (ulong) (0xff &
5077 readl(&((struct CUSTOM_REG *)
5078 (cy_pci_addr2))->fpga_id)),
5079 (ulong)(0xff &
5080 readl(&((struct CUSTOM_REG *)
5081 (cy_pci_addr2))->
5082 fpga_version)));
5083 cy_writel(&((struct RUNTIME_9060 *)
5084 (cy_pci_addr0))->loc_addr_base,
5085 WIN_RAM);
5086 } else {
5087 printk("Cyclades-Z/PCI: New Cyclades-Z board. "
5088 "FPGA not loaded\n");
5089 }
5090 #endif
5091 /* The following clears the firmware id word. This
5092 ensures that the driver will not attempt to talk to
5093 the board until it has been properly initialized.
5094 */
5095 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5096 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
5097
5098 /* This must be a Cyclades-8Zo/PCI. The extendable
5099 version will have a different device_id and will
5100 be allocated its maximum number of ports. */
5101 cy_pci_nchan = 8;
5102
5103 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5104 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5105 "no channels are available.\nChange "
5106 "NR_PORTS in cyclades.c and recompile "
5107 "kernel.\n", (ulong)cy_pci_phys2);
5108 return i;
5109 }
5110
5111 /* fill the next cy_card structure available */
5112 for (j = 0; j < NR_CARDS; j++) {
5113 if (cy_card[j].base_addr == 0)
5114 break;
5115 }
5116 if (j == NR_CARDS) { /* no more cy_cards available */
5117 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5118 "no more cards can be used.\nChange "
5119 "NR_CARDS in cyclades.c and recompile "
5120 "kernel.\n", (ulong)cy_pci_phys2);
5121 return i;
5122 }
5123 #ifdef CONFIG_CYZ_INTR
5124 /* allocate IRQ only if board has an IRQ */
5125 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5126 if (request_irq(cy_pci_irq, cyz_interrupt,
5127 IRQF_SHARED, "Cyclades-Z",
5128 &cy_card[j])) {
5129 printk("Cyclom-8Zo/PCI found at 0x%lx "
5130 "but could not allocate "
5131 "IRQ%d.\n", (ulong)cy_pci_phys2,
5132 cy_pci_irq);
5133 return i;
5134 }
5135 }
5136 #endif /* CONFIG_CYZ_INTR */
5137
5138 /* set cy_card */
5139 cy_card[j].base_phys = cy_pci_phys2;
5140 cy_card[j].ctl_phys = cy_pci_phys0;
5141 cy_card[j].base_addr = cy_pci_addr2;
5142 cy_card[j].ctl_addr = cy_pci_addr0;
5143 cy_card[j].irq = (int)cy_pci_irq;
5144 cy_card[j].bus_index = 1;
5145 cy_card[j].first_line = cy_next_channel;
5146 cy_card[j].num_chips = -1;
5147 cy_card[j].pdev = pdev;
5148
5149 /* print message */
5150 #ifdef CONFIG_CYZ_INTR
5151 /* don't report IRQ if board is no IRQ */
5152 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5153 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, "
5154 "IRQ%d, ", j + 1, (ulong)cy_pci_phys2,
5155 (ulong) (cy_pci_phys2 + CyPCI_Zwin - 1),
5156 (int)cy_pci_irq);
5157 else
5158 #endif /* CONFIG_CYZ_INTR */
5159 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
5160 j + 1, (ulong)cy_pci_phys2,
5161 (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));
5162
5163 printk("%d channels starting from port %d.\n",
5164 cy_pci_nchan, cy_next_channel);
5165 cy_next_channel += cy_pci_nchan;
5166 }
5167 }
5168
5169 for (; ZeIndex != 0 && i < NR_CARDS; i++) {
5170 cy_pci_phys0 = Ze_phys0[0];
5171 cy_pci_phys2 = Ze_phys2[0];
5172 cy_pci_addr0 = Ze_addr0[0];
5173 cy_pci_addr2 = Ze_addr2[0];
5174 cy_pci_irq = Ze_irq[0];
5175 pdev = Ze_pdev[0];
5176 for (j = 0; j < ZeIndex - 1; j++) {
5177 Ze_phys0[j] = Ze_phys0[j + 1];
5178 Ze_phys2[j] = Ze_phys2[j + 1];
5179 Ze_addr0[j] = Ze_addr0[j + 1];
5180 Ze_addr2[j] = Ze_addr2[j + 1];
5181 Ze_irq[j] = Ze_irq[j + 1];
5182 Ze_pdev[j] = Ze_pdev[j + 1];
5183 }
5184 ZeIndex--;
5185 retval = cy_init_Ze(cy_pci_phys0, cy_pci_phys2, cy_pci_addr0,
5186 cy_pci_addr2, cy_pci_irq, pdev);
5187 if (retval < 0)
5188 return i;
5189 }
5190 if (ZeIndex != 0) {
5191 printk("Cyclades-Ze/PCI found at 0x%x but no more cards can be "
5192 "used.\nChange NR_CARDS in cyclades.c and recompile "
5193 "kernel.\n", (unsigned int)Ze_phys2[0]);
5194 }
5195 return i;
5196 #else
5197 return 0;
5198 #endif /* ifdef CONFIG_PCI */
5199 } /* cy_detect_pci */
5200
5201 /*
5202 * This routine prints out the appropriate serial driver version number
5203 * and identifies which options were configured into this driver.
5204 */
5205 static inline void show_version(void)
5206 {
5207 printk("Cyclades driver " CY_VERSION "\n");
5208 printk(" built %s %s\n", __DATE__, __TIME__);
5209 } /* show_version */
5210
5211 static int
5212 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5213 int *eof, void *data)
5214 {
5215 struct cyclades_port *info;
5216 int i;
5217 int len = 0;
5218 off_t begin = 0;
5219 off_t pos = 0;
5220 int size;
5221 __u32 cur_jifs = jiffies;
5222
5223 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5224 "IdleIn Overruns Ldisc\n");
5225
5226 pos += size;
5227 len += size;
5228
5229 /* Output one line for each known port */
5230 for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5231 info = &cy_port[i];
5232
5233 if (info->count)
5234 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5235 "%8lu %9lu %6ld\n", info->line,
5236 (cur_jifs - info->idle_stats.in_use) / HZ,
5237 info->idle_stats.xmit_bytes,
5238 (cur_jifs - info->idle_stats.xmit_idle) / HZ,
5239 info->idle_stats.recv_bytes,
5240 (cur_jifs - info->idle_stats.recv_idle) / HZ,
5241 info->idle_stats.overruns,
5242 (long)info->tty->ldisc.num);
5243 else
5244 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5245 "%8lu %9lu %6ld\n",
5246 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5247 len += size;
5248 pos = begin + len;
5249
5250 if (pos < offset) {
5251 len = 0;
5252 begin = pos;
5253 }
5254 if (pos > offset + length)
5255 goto done;
5256 }
5257 *eof = 1;
5258 done:
5259 *start = buf + (offset - begin); /* Start of wanted data */
5260 len -= (offset - begin); /* Start slop */
5261 if (len > length)
5262 len = length; /* Ending slop */
5263 if (len < 0)
5264 len = 0;
5265 return len;
5266 }
5267
5268 /* The serial driver boot-time initialization code!
5269 Hardware I/O ports are mapped to character special devices on a
5270 first found, first allocated manner. That is, this code searches
5271 for Cyclom cards in the system. As each is found, it is probed
5272 to discover how many chips (and thus how many ports) are present.
5273 These ports are mapped to the tty ports 32 and upward in monotonic
5274 fashion. If an 8-port card is replaced with a 16-port card, the
5275 port mapping on a following card will shift.
5276
5277 This approach is different from what is used in the other serial
5278 device driver because the Cyclom is more properly a multiplexer,
5279 not just an aggregation of serial ports on one card.
5280
5281 If there are more cards with more ports than have been
5282 statically allocated above, a warning is printed and the
5283 extra ports are ignored.
5284 */
5285
5286 static const struct tty_operations cy_ops = {
5287 .open = cy_open,
5288 .close = cy_close,
5289 .write = cy_write,
5290 .put_char = cy_put_char,
5291 .flush_chars = cy_flush_chars,
5292 .write_room = cy_write_room,
5293 .chars_in_buffer = cy_chars_in_buffer,
5294 .flush_buffer = cy_flush_buffer,
5295 .ioctl = cy_ioctl,
5296 .throttle = cy_throttle,
5297 .unthrottle = cy_unthrottle,
5298 .set_termios = cy_set_termios,
5299 .stop = cy_stop,
5300 .start = cy_start,
5301 .hangup = cy_hangup,
5302 .break_ctl = cy_break,
5303 .wait_until_sent = cy_wait_until_sent,
5304 .read_proc = cyclades_get_proc_info,
5305 .tiocmget = cy_tiocmget,
5306 .tiocmset = cy_tiocmset,
5307 };
5308
5309 static int __init cy_init(void)
5310 {
5311 struct cyclades_port *info;
5312 struct cyclades_card *cinfo;
5313 int number_z_boards = 0;
5314 int board, port, i, index;
5315 unsigned long mailbox;
5316 unsigned short chip_number;
5317 int nports;
5318
5319 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5320 if (!cy_serial_driver)
5321 return -ENOMEM;
5322 show_version();
5323
5324 /* Initialize the tty_driver structure */
5325
5326 cy_serial_driver->owner = THIS_MODULE;
5327 cy_serial_driver->driver_name = "cyclades";
5328 cy_serial_driver->name = "ttyC";
5329 cy_serial_driver->major = CYCLADES_MAJOR;
5330 cy_serial_driver->minor_start = 0;
5331 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5332 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5333 cy_serial_driver->init_termios = tty_std_termios;
5334 cy_serial_driver->init_termios.c_cflag =
5335 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5336 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
5337 tty_set_operations(cy_serial_driver, &cy_ops);
5338
5339 if (tty_register_driver(cy_serial_driver))
5340 panic("Couldn't register Cyclades serial driver\n");
5341
5342 for (i = 0; i < NR_CARDS; i++) {
5343 /* base_addr=0 indicates board not found */
5344 cy_card[i].base_addr = NULL;
5345 }
5346
5347 /* the code below is responsible to find the boards. Each different
5348 type of board has its own detection routine. If a board is found,
5349 the next cy_card structure available is set by the detection
5350 routine. These functions are responsible for checking the
5351 availability of cy_card and cy_port data structures and updating
5352 the cy_next_channel. */
5353
5354 /* look for isa boards */
5355 cy_isa_nboard = cy_detect_isa();
5356
5357 /* look for pci boards */
5358 cy_pci_nboard = cy_detect_pci();
5359
5360 cy_nboard = cy_isa_nboard + cy_pci_nboard;
5361
5362 /* invalidate remaining cy_card structures */
5363 for (i = 0; i < NR_CARDS; i++) {
5364 if (cy_card[i].base_addr == 0) {
5365 cy_card[i].first_line = -1;
5366 cy_card[i].ctl_addr = NULL;
5367 cy_card[i].irq = 0;
5368 cy_card[i].bus_index = 0;
5369 cy_card[i].first_line = 0;
5370 cy_card[i].num_chips = 0;
5371 }
5372 }
5373 /* invalidate remaining cy_port structures */
5374 for (i = cy_next_channel; i < NR_PORTS; i++) {
5375 cy_port[i].line = -1;
5376 cy_port[i].magic = -1;
5377 }
5378
5379 /* initialize per-port data structures for each valid board found */
5380 for (board = 0; board < cy_nboard; board++) {
5381 cinfo = &cy_card[board];
5382 if (cinfo->num_chips == -1) { /* Cyclades-Z */
5383 number_z_boards++;
5384 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
5385 cy_card[board].ctl_addr)->
5386 mail_box_0);
5387 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
5388 cinfo->intr_enabled = 0;
5389 cinfo->nports = 0; /* Will be correctly set later, after
5390 Z FW is loaded */
5391 spin_lock_init(&cinfo->card_lock);
5392 for (port = cinfo->first_line;
5393 port < cinfo->first_line + nports; port++) {
5394 info = &cy_port[port];
5395 info->magic = CYCLADES_MAGIC;
5396 info->type = PORT_STARTECH;
5397 info->card = board;
5398 info->line = port;
5399 info->chip_rev = 0;
5400 info->flags = STD_COM_FLAGS;
5401 info->tty = NULL;
5402 if (mailbox == ZO_V1)
5403 info->xmit_fifo_size = CYZ_FIFO_SIZE;
5404 else
5405 info->xmit_fifo_size =
5406 4 * CYZ_FIFO_SIZE;
5407 info->cor1 = 0;
5408 info->cor2 = 0;
5409 info->cor3 = 0;
5410 info->cor4 = 0;
5411 info->cor5 = 0;
5412 info->tbpr = 0;
5413 info->tco = 0;
5414 info->rbpr = 0;
5415 info->rco = 0;
5416 info->custom_divisor = 0;
5417 info->close_delay = 5 * HZ / 10;
5418 info->closing_wait = CLOSING_WAIT_DELAY;
5419 info->icount.cts = info->icount.dsr =
5420 info->icount.rng = info->icount.dcd = 0;
5421 info->icount.rx = info->icount.tx = 0;
5422 info->icount.frame = info->icount.parity = 0;
5423 info->icount.overrun = info->icount.brk = 0;
5424 info->x_char = 0;
5425 info->event = 0;
5426 info->count = 0;
5427 info->blocked_open = 0;
5428 info->default_threshold = 0;
5429 info->default_timeout = 0;
5430 INIT_WORK(&info->tqueue, do_softint);
5431 init_waitqueue_head(&info->open_wait);
5432 init_waitqueue_head(&info->close_wait);
5433 init_waitqueue_head(&info->shutdown_wait);
5434 init_waitqueue_head(&info->delta_msr_wait);
5435 /* info->session */
5436 /* info->pgrp */
5437 info->read_status_mask = 0;
5438 /* info->timeout */
5439 /* Bentson's vars */
5440 info->jiffies[0] = 0;
5441 info->jiffies[1] = 0;
5442 info->jiffies[2] = 0;
5443 info->rflush_count = 0;
5444 #ifdef CONFIG_CYZ_INTR
5445 init_timer(&cyz_rx_full_timer[port]);
5446 cyz_rx_full_timer[port].function = NULL;
5447 #endif
5448 }
5449 continue;
5450 } else { /* Cyclom-Y of some kind */
5451 index = cinfo->bus_index;
5452 spin_lock_init(&cinfo->card_lock);
5453 cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
5454 for (port = cinfo->first_line;
5455 port < cinfo->first_line + cinfo->nports; port++) {
5456 info = &cy_port[port];
5457 info->magic = CYCLADES_MAGIC;
5458 info->type = PORT_CIRRUS;
5459 info->card = board;
5460 info->line = port;
5461 info->flags = STD_COM_FLAGS;
5462 info->tty = NULL;
5463 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
5464 info->cor1 =
5465 CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
5466 info->cor2 = CyETC;
5467 info->cor3 = 0x08; /* _very_ small rcv threshold */
5468 info->cor4 = 0;
5469 info->cor5 = 0;
5470 info->custom_divisor = 0;
5471 info->close_delay = 5 * HZ / 10;
5472 info->closing_wait = CLOSING_WAIT_DELAY;
5473 info->icount.cts = info->icount.dsr =
5474 info->icount.rng = info->icount.dcd = 0;
5475 info->icount.rx = info->icount.tx = 0;
5476 info->icount.frame = info->icount.parity = 0;
5477 info->icount.overrun = info->icount.brk = 0;
5478 chip_number = (port - cinfo->first_line) / 4;
5479 if ((info->chip_rev =
5480 readb(cinfo->base_addr +
5481 (cy_chip_offset[chip_number] <<
5482 index) + (CyGFRCR << index))) >=
5483 CD1400_REV_J) {
5484 /* It is a CD1400 rev. J or later */
5485 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
5486 info->tco = baud_co_60[13]; /* Tx CO */
5487 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
5488 info->rco = baud_co_60[13]; /* Rx CO */
5489 info->rflow = 0;
5490 info->rtsdtr_inv = 1;
5491 } else {
5492 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
5493 info->tco = baud_co_25[13]; /* Tx CO */
5494 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
5495 info->rco = baud_co_25[13]; /* Rx CO */
5496 info->rflow = 0;
5497 info->rtsdtr_inv = 0;
5498 }
5499 info->x_char = 0;
5500 info->event = 0;
5501 info->count = 0;
5502 info->blocked_open = 0;
5503 info->default_threshold = 0;
5504 info->default_timeout = 0;
5505 INIT_WORK(&info->tqueue, do_softint);
5506 init_waitqueue_head(&info->open_wait);
5507 init_waitqueue_head(&info->close_wait);
5508 init_waitqueue_head(&info->shutdown_wait);
5509 init_waitqueue_head(&info->delta_msr_wait);
5510 /* info->session */
5511 /* info->pgrp */
5512 info->read_status_mask =
5513 CyTIMEOUT | CySPECHAR | CyBREAK
5514 | CyPARITY | CyFRAME | CyOVERRUN;
5515 /* info->timeout */
5516 }
5517 }
5518 }
5519
5520 #ifndef CONFIG_CYZ_INTR
5521 if (number_z_boards) {
5522 mod_timer(&cyz_timerlist, jiffies + 1);
5523 #ifdef CY_PCI_DEBUG
5524 printk("Cyclades-Z polling initialized\n");
5525 #endif
5526 }
5527 #endif /* CONFIG_CYZ_INTR */
5528
5529 return 0;
5530
5531 } /* cy_init */
5532
5533 static void __exit cy_cleanup_module(void)
5534 {
5535 int i, e1;
5536
5537 #ifndef CONFIG_CYZ_INTR
5538 del_timer_sync(&cyz_timerlist);
5539 #endif /* CONFIG_CYZ_INTR */
5540
5541 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5542 printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
5543 e1);
5544
5545 put_tty_driver(cy_serial_driver);
5546
5547 for (i = 0; i < NR_CARDS; i++) {
5548 if (cy_card[i].base_addr) {
5549 iounmap(cy_card[i].base_addr);
5550 if (cy_card[i].ctl_addr)
5551 iounmap(cy_card[i].ctl_addr);
5552 if (cy_card[i].irq
5553 #ifndef CONFIG_CYZ_INTR
5554 && cy_card[i].num_chips != -1 /* not a Z card */
5555 #endif /* CONFIG_CYZ_INTR */
5556 )
5557 free_irq(cy_card[i].irq, &cy_card[i]);
5558 #ifdef CONFIG_PCI
5559 if (cy_card[i].pdev)
5560 pci_release_regions(cy_card[i].pdev);
5561 #endif
5562 }
5563 }
5564 } /* cy_cleanup_module */
5565
5566 module_init(cy_init);
5567 module_exit(cy_cleanup_module);
5568
5569 MODULE_LICENSE("GPL");
SocketAccessConTroL development