ACPI: thinkpad-acpi: improve dock subdriver initialization
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / char / cyclades.c
blobe4e0ccb466733c7872b835680a3c6138b6e2e2ff
1 #undef BLOCKMOVE
2 #define Z_WAKE
3 #undef Z_EXT_CHARS_IN_BUFFER
5 /*
6 * linux/drivers/char/cyclades.c
8 * This file contains the driver for the Cyclades async multiport
9 * serial boards.
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>.
15 * For Technical support and installation problems, please send e-mail
16 * to support@cyclades.com.
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.
23 * This version supports shared IRQ's (only for PCI boards).
25 * $Log: cyclades.c,v $
26 * Prevent users from opening non-existing Z ports.
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.
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).
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".
51 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
52 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
54 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
55 * Fixed SMP locking in Cyclom-Y interrupt handler.
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;
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;
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;
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;
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);
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).
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).
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).
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.
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.
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.
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).
148 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
149 * Fixed Cyclom-4Yo hardware detection bug.
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.
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).
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.
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.
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).
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.
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);
199 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
200 * Fixes related to kernel version conditional
201 * compilation.
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).
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.
211 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
212 * Changes to support new cycladesZ boards.
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.
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.
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.
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.
250 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
251 * Included check for NULL tty pointer in cyz_poll.
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;"
258 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
259 * Changed low water threshold for buffer xmit_buf
261 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
262 * Marcio provided fix to modem status fetch for -Z
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)
268 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
269 * shift from CPU-bound to memcopy in cyz_polling operation
271 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
272 * Added support to set and report higher speeds.
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.
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;
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;
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;
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
299 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
300 * check more -Z board status; shorten boot message
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;
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)
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).
316 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
317 * add code for -Z in set_line_char
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.
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;
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
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
340 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
341 * rename vars and restructure some code
343 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
344 * get right status back after boot load
346 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
347 * successfully loads firmware
349 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
350 * add more of the code for the boot/load ioctls
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
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)
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>
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;
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).
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.
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.
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.
395 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
396 * remove printk from ISR; fix typo
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.
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.
408 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
409 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
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>);
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>);
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;
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>);
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
444 * Revision 1.34 1994/12/10 12:37:12 steffen
445 * This is the corrected version as suggested by Marcio Saito
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
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
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
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
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).
471 * Revision 1.28 1994/11/04 00:13:16 root
472 * turn off diagnostic messages
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)
478 * Revision 1.26 1994/11/03 22:40:36 root
479 * automatic interrupt probing fixed.
481 * Revision 1.25 1994/11/03 20:17:02 root
482 * start to implement auto-irq
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
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;
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
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
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;
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;
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);
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;
523 * Revision 1.16 1994/10/30 01:14:33 bentson
524 * change major numbers; add some _early_ return statements;
526 * Revision 1.15 1994/10/29 06:43:15 bentson
527 * final tidying up for clean compile; enable some error reporting
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.
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)
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
547 * Revision 1.11 1994/06/11 21:53:10 bentson
548 * get use of save_car right in transmit interrupt service
550 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
551 * add some diagnostic printing; try to fix save_car stuff
553 * Revision 1.10 1994/06/11 20:36:08 bentson
554 * clean up compiler warnings
556 * Revision 1.9 1994/06/11 19:42:46 bentson
557 * added a bunch of code to support modem signalling
559 * Revision 1.8 1994/06/11 17:57:07 bentson
560 * recognize break & parity error
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;
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
577 * Revision 1.5 1994/05/30 00:55:02 bentson
578 * transmit works without obvious errors
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
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
589 * Revision 1.2 1994/05/19 13:21:43 bentson
590 * start to crib from other sources
594 #define CY_VERSION "2.4"
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. */
600 #define NR_CARDS 4
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. */
607 #define NR_PORTS 256
609 #define ZE_V1_NPORTS 64
610 #define ZO_V1 0
611 #define ZO_V2 1
612 #define ZE_V1 2
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
627 #if 0
628 #define PAUSE __asm__("nop")
629 #else
630 #define PAUSE do {} while (0)
631 #endif
634 * Include section
636 #include <linux/module.h>
637 #include <linux/errno.h>
638 #include <linux/signal.h>
639 #include <linux/sched.h>
640 #include <linux/timer.h>
641 #include <linux/interrupt.h>
642 #include <linux/tty.h>
643 #include <linux/tty_flip.h>
644 #include <linux/serial.h>
645 #include <linux/major.h>
646 #include <linux/string.h>
647 #include <linux/fcntl.h>
648 #include <linux/ptrace.h>
649 #include <linux/cyclades.h>
650 #include <linux/mm.h>
651 #include <linux/ioport.h>
652 #include <linux/init.h>
653 #include <linux/delay.h>
654 #include <linux/spinlock.h>
655 #include <linux/bitops.h>
657 #include <asm/system.h>
658 #include <asm/io.h>
659 #include <asm/irq.h>
660 #include <asm/uaccess.h>
662 #define CY_LOCK(info,flags) \
663 do { \
664 spin_lock_irqsave(&cy_card[info->card].card_lock, flags); \
665 } while (0)
667 #define CY_UNLOCK(info,flags) \
668 do { \
669 spin_unlock_irqrestore(&cy_card[info->card].card_lock, flags); \
670 } while (0)
672 #include <linux/types.h>
673 #include <linux/kernel.h>
674 #include <linux/pci.h>
676 #include <linux/stat.h>
677 #include <linux/proc_fs.h>
679 static void cy_throttle(struct tty_struct *tty);
680 static void cy_send_xchar(struct tty_struct *tty, char ch);
682 #define IS_CYC_Z(card) ((card).num_chips == -1)
684 #define Z_FPGA_CHECK(card) \
685 ((cy_readl(&((struct RUNTIME_9060 __iomem *) \
686 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
688 #define ISZLOADED(card) (((ZO_V1==cy_readl(&((struct RUNTIME_9060 __iomem *) \
689 ((card).ctl_addr))->mail_box_0)) || \
690 Z_FPGA_CHECK(card)) && \
691 (ZFIRM_ID==cy_readl(&((struct FIRM_ID __iomem *) \
692 ((card).base_addr+ID_ADDRESS))->signature)))
694 #ifndef SERIAL_XMIT_SIZE
695 #define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
696 #endif
697 #define WAKEUP_CHARS 256
699 #define STD_COM_FLAGS (0)
701 static struct tty_driver *cy_serial_driver;
703 #ifdef CONFIG_ISA
704 /* This is the address lookup table. The driver will probe for
705 Cyclom-Y/ISA boards at all addresses in here. If you want the
706 driver to probe addresses at a different address, add it to
707 this table. If the driver is probing some other board and
708 causing problems, remove the offending address from this table.
709 The cy_setup function extracts additional addresses from the
710 boot options line. The form is "cyclades=address,address..."
713 static unsigned int cy_isa_addresses[] = {
714 0xD0000,
715 0xD2000,
716 0xD4000,
717 0xD6000,
718 0xD8000,
719 0xDA000,
720 0xDC000,
721 0xDE000,
722 0, 0, 0, 0, 0, 0, 0, 0
725 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
727 #ifdef MODULE
728 static long maddr[NR_CARDS] = { 0, };
729 static int irq[NR_CARDS] = { 0, };
731 module_param_array(maddr, long, NULL, 0);
732 module_param_array(irq, int, NULL, 0);
733 #endif
735 #endif /* CONFIG_ISA */
737 /* This is the per-card data structure containing address, irq, number of
738 channels, etc. This driver supports a maximum of NR_CARDS cards.
740 static struct cyclades_card cy_card[NR_CARDS];
742 /* This is the per-channel data structure containing pointers, flags
743 and variables for the port. This driver supports a maximum of NR_PORTS.
745 static struct cyclades_port cy_port[NR_PORTS];
747 static int cy_next_channel; /* next minor available */
750 * This is used to look up the divisor speeds and the timeouts
751 * We're normally limited to 15 distinct baud rates. The extra
752 * are accessed via settings in info->flags.
753 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
754 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
755 * HI VHI
756 * 20
758 static int baud_table[] = {
759 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
760 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
761 230400, 0
764 static char baud_co_25[] = { /* 25 MHz clock option table */
765 /* value => 00 01 02 03 04 */
766 /* divide by 8 32 128 512 2048 */
767 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
768 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
771 static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
772 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
773 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
776 static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
777 /* value => 00 01 02 03 04 */
778 /* divide by 8 32 128 512 2048 */
779 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
780 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
781 0x00
784 static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
785 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
786 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
787 0x21
790 static char baud_cor3[] = { /* receive threshold */
791 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
792 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
793 0x07
797 * The Cyclades driver implements HW flow control as any serial driver.
798 * The cyclades_port structure member rflow and the vector rflow_thr
799 * allows us to take advantage of a special feature in the CD1400 to avoid
800 * data loss even when the system interrupt latency is too high. These flags
801 * are to be used only with very special applications. Setting these flags
802 * requires the use of a special cable (DTR and RTS reversed). In the new
803 * CD1400-based boards (rev. 6.00 or later), there is no need for special
804 * cables.
807 static char rflow_thr[] = { /* rflow threshold */
808 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
809 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
810 0x0a
813 /* The Cyclom-Ye has placed the sequential chips in non-sequential
814 * address order. This look-up table overcomes that problem.
816 static int cy_chip_offset[] = { 0x0000,
817 0x0400,
818 0x0800,
819 0x0C00,
820 0x0200,
821 0x0600,
822 0x0A00,
823 0x0E00
826 /* PCI related definitions */
828 static unsigned short cy_pci_nboard;
829 static unsigned short cy_isa_nboard;
830 static unsigned short cy_nboard;
831 #ifdef CONFIG_PCI
832 static unsigned short cy_pci_dev_id[] = {
833 PCI_DEVICE_ID_CYCLOM_Y_Lo, /* PCI < 1Mb */
834 PCI_DEVICE_ID_CYCLOM_Y_Hi, /* PCI > 1Mb */
835 PCI_DEVICE_ID_CYCLOM_4Y_Lo, /* 4Y PCI < 1Mb */
836 PCI_DEVICE_ID_CYCLOM_4Y_Hi, /* 4Y PCI > 1Mb */
837 PCI_DEVICE_ID_CYCLOM_8Y_Lo, /* 8Y PCI < 1Mb */
838 PCI_DEVICE_ID_CYCLOM_8Y_Hi, /* 8Y PCI > 1Mb */
839 PCI_DEVICE_ID_CYCLOM_Z_Lo, /* Z PCI < 1Mb */
840 PCI_DEVICE_ID_CYCLOM_Z_Hi, /* Z PCI > 1Mb */
841 0 /* end of table */
843 #endif
845 static void cy_start(struct tty_struct *);
846 static void set_line_char(struct cyclades_port *);
847 static int cyz_issue_cmd(struct cyclades_card *, uclong, ucchar, uclong);
848 #ifdef CONFIG_ISA
849 static unsigned detect_isa_irq(void __iomem *);
850 #endif /* CONFIG_ISA */
852 static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
854 #ifndef CONFIG_CYZ_INTR
855 static void cyz_poll(unsigned long);
857 /* The Cyclades-Z polling cycle is defined by this variable */
858 static long cyz_polling_cycle = CZ_DEF_POLL;
860 static int cyz_timeron = 0;
861 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
863 #else /* CONFIG_CYZ_INTR */
864 static void cyz_rx_restart(unsigned long);
865 static struct timer_list cyz_rx_full_timer[NR_PORTS];
866 #endif /* CONFIG_CYZ_INTR */
868 static inline int serial_paranoia_check(struct cyclades_port *info,
869 char *name, const char *routine)
871 #ifdef SERIAL_PARANOIA_CHECK
872 if (!info) {
873 printk("cyc Warning: null cyclades_port for (%s) in %s\n",
874 name, routine);
875 return 1;
878 if ((long)info < (long)(&cy_port[0]) ||
879 (long)(&cy_port[NR_PORTS]) < (long)info) {
880 printk("cyc Warning: cyclades_port out of range for (%s) in "
881 "%s\n", name, routine);
882 return 1;
885 if (info->magic != CYCLADES_MAGIC) {
886 printk("cyc Warning: bad magic number for serial struct (%s) "
887 "in %s\n", name, routine);
888 return 1;
890 #endif
891 return 0;
892 } /* serial_paranoia_check */
895 * This routine is used by the interrupt handler to schedule
896 * processing in the software interrupt portion of the driver
897 * (also known as the "bottom half"). This can be called any
898 * number of times for any channel without harm.
900 static inline void cy_sched_event(struct cyclades_port *info, int event)
902 info->event |= 1 << event; /* remember what kind of event and who */
903 schedule_work(&info->tqueue);
904 } /* cy_sched_event */
907 * This routine is used to handle the "bottom half" processing for the
908 * serial driver, known also the "software interrupt" processing.
909 * This processing is done at the kernel interrupt level, after the
910 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
911 * is where time-consuming activities which can not be done in the
912 * interrupt driver proper are done; the interrupt driver schedules
913 * them using cy_sched_event(), and they get done here.
915 * This is done through one level of indirection--the task queue.
916 * When a hardware interrupt service routine wants service by the
917 * driver's bottom half, it enqueues the appropriate tq_struct (one
918 * per port) to the keventd work queue and sets a request flag
919 * that the work queue be processed.
921 * Although this may seem unwieldy, it gives the system a way to
922 * pass an argument (in this case the pointer to the cyclades_port
923 * structure) to the bottom half of the driver. Previous kernels
924 * had to poll every port to see if that port needed servicing.
926 static void
927 do_softint(struct work_struct *work)
929 struct cyclades_port *info =
930 container_of(work, struct cyclades_port, tqueue);
931 struct tty_struct *tty;
933 tty = info->tty;
934 if (!tty)
935 return;
937 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
938 tty_hangup(info->tty);
939 wake_up_interruptible(&info->open_wait);
940 info->flags &= ~ASYNC_NORMAL_ACTIVE;
942 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
943 wake_up_interruptible(&info->open_wait);
944 #ifdef CONFIG_CYZ_INTR
945 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
946 if (cyz_rx_full_timer[info->line].function == NULL) {
947 cyz_rx_full_timer[info->line].expires = jiffies + 1;
948 cyz_rx_full_timer[info->line].function = cyz_rx_restart;
949 cyz_rx_full_timer[info->line].data =
950 (unsigned long)info;
951 add_timer(&cyz_rx_full_timer[info->line]);
954 #endif
955 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
956 wake_up_interruptible(&info->delta_msr_wait);
957 tty_wakeup(tty);
958 #ifdef Z_WAKE
959 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
960 wake_up_interruptible(&info->shutdown_wait);
961 #endif
962 } /* do_softint */
965 /***********************************************************/
966 /********* Start of block of Cyclom-Y specific code ********/
968 /* This routine waits up to 1000 micro-seconds for the previous
969 command to the Cirrus chip to complete and then issues the
970 new command. An error is returned if the previous command
971 didn't finish within the time limit.
973 This function is only called from inside spinlock-protected code.
975 static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
977 volatile int i;
979 /* Check to see that the previous command has completed */
980 for (i = 0; i < 100; i++) {
981 if (cy_readb(base_addr + (CyCCR << index)) == 0) {
982 break;
984 udelay(10L);
986 /* if the CCR never cleared, the previous command
987 didn't finish within the "reasonable time" */
988 if (i == 100)
989 return -1;
991 /* Issue the new command */
992 cy_writeb(base_addr + (CyCCR << index), cmd);
994 return 0;
995 } /* cyy_issue_cmd */
997 #ifdef CONFIG_ISA
998 /* ISA interrupt detection code */
999 static unsigned detect_isa_irq(void __iomem * address)
1001 int irq;
1002 unsigned long irqs, flags;
1003 int save_xir, save_car;
1004 int index = 0; /* IRQ probing is only for ISA */
1006 /* forget possible initially masked and pending IRQ */
1007 irq = probe_irq_off(probe_irq_on());
1009 /* Clear interrupts on the board first */
1010 cy_writeb(address + (Cy_ClrIntr << index), 0);
1011 /* Cy_ClrIntr is 0x1800 */
1013 irqs = probe_irq_on();
1014 /* Wait ... */
1015 udelay(5000L);
1017 /* Enable the Tx interrupts on the CD1400 */
1018 local_irq_save(flags);
1019 cy_writeb(address + (CyCAR << index), 0);
1020 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
1022 cy_writeb(address + (CyCAR << index), 0);
1023 cy_writeb(address + (CySRER << index),
1024 cy_readb(address + (CySRER << index)) | CyTxRdy);
1025 local_irq_restore(flags);
1027 /* Wait ... */
1028 udelay(5000L);
1030 /* Check which interrupt is in use */
1031 irq = probe_irq_off(irqs);
1033 /* Clean up */
1034 save_xir = (u_char) cy_readb(address + (CyTIR << index));
1035 save_car = cy_readb(address + (CyCAR << index));
1036 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1037 cy_writeb(address + (CySRER << index),
1038 cy_readb(address + (CySRER << index)) & ~CyTxRdy);
1039 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1040 cy_writeb(address + (CyCAR << index), (save_car));
1041 cy_writeb(address + (Cy_ClrIntr << index), 0);
1042 /* Cy_ClrIntr is 0x1800 */
1044 return (irq > 0) ? irq : 0;
1046 #endif /* CONFIG_ISA */
1048 static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
1049 void __iomem * base_addr, int status, int index)
1051 struct cyclades_port *info;
1052 struct tty_struct *tty;
1053 volatile int char_count;
1054 int i, j, len, mdm_change, mdm_status, outch;
1055 int save_xir, channel, save_car;
1056 char data;
1058 if (status & CySRReceive) { /* reception interrupt */
1059 #ifdef CY_DEBUG_INTERRUPTS
1060 printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
1061 #endif
1062 /* determine the channel & change to that context */
1063 spin_lock(&cinfo->card_lock);
1064 save_xir = (u_char) cy_readb(base_addr + (CyRIR << index));
1065 channel = (u_short) (save_xir & CyIRChannel);
1066 i = channel + chip * 4 + cinfo->first_line;
1067 info = &cy_port[i];
1068 info->last_active = jiffies;
1069 save_car = cy_readb(base_addr + (CyCAR << index));
1070 cy_writeb(base_addr + (CyCAR << index), save_xir);
1072 /* if there is nowhere to put the data, discard it */
1073 if (info->tty == 0) {
1074 j = (cy_readb(base_addr + (CyRIVR << index)) &
1075 CyIVRMask);
1076 if (j == CyIVRRxEx) { /* exception */
1077 data = cy_readb(base_addr + (CyRDSR << index));
1078 } else { /* normal character reception */
1079 char_count = cy_readb(base_addr +
1080 (CyRDCR << index));
1081 while (char_count--) {
1082 data = cy_readb(base_addr +
1083 (CyRDSR << index));
1086 } else { /* there is an open port for this data */
1087 tty = info->tty;
1088 j = (cy_readb(base_addr + (CyRIVR << index)) &
1089 CyIVRMask);
1090 if (j == CyIVRRxEx) { /* exception */
1091 data = cy_readb(base_addr + (CyRDSR << index));
1093 /* For statistics only */
1094 if (data & CyBREAK)
1095 info->icount.brk++;
1096 else if (data & CyFRAME)
1097 info->icount.frame++;
1098 else if (data & CyPARITY)
1099 info->icount.parity++;
1100 else if (data & CyOVERRUN)
1101 info->icount.overrun++;
1103 if (data & info->ignore_status_mask) {
1104 info->icount.rx++;
1105 spin_unlock(&cinfo->card_lock);
1106 return;
1108 if (tty_buffer_request_room(tty, 1)) {
1109 if (data & info->read_status_mask) {
1110 if (data & CyBREAK) {
1111 tty_insert_flip_char(
1112 tty,
1113 cy_readb(
1114 base_addr +
1115 (CyRDSR <<
1116 index)),
1117 TTY_BREAK);
1118 info->icount.rx++;
1119 if (info->flags &
1120 ASYNC_SAK) {
1121 do_SAK(tty);
1123 } else if (data & CyFRAME) {
1124 tty_insert_flip_char(
1125 tty,
1126 cy_readb(
1127 base_addr +
1128 (CyRDSR <<
1129 index)),
1130 TTY_FRAME);
1131 info->icount.rx++;
1132 info->idle_stats.
1133 frame_errs++;
1134 } else if (data & CyPARITY) {
1135 /* Pieces of seven... */
1136 tty_insert_flip_char(
1137 tty,
1138 cy_readb(
1139 base_addr +
1140 (CyRDSR <<
1141 index)),
1142 TTY_PARITY);
1143 info->icount.rx++;
1144 info->idle_stats.
1145 parity_errs++;
1146 } else if (data & CyOVERRUN) {
1147 tty_insert_flip_char(
1148 tty, 0,
1149 TTY_OVERRUN);
1150 info->icount.rx++;
1151 /* If the flip buffer itself is
1152 overflowing, we still lose
1153 the next incoming character.
1155 tty_insert_flip_char(
1156 tty,
1157 cy_readb(
1158 base_addr +
1159 (CyRDSR <<
1160 index)),
1161 TTY_FRAME);
1162 info->icount.rx++;
1163 info->idle_stats.
1164 overruns++;
1165 /* These two conditions may imply */
1166 /* a normal read should be done. */
1167 /* }else if(data & CyTIMEOUT){ */
1168 /* }else if(data & CySPECHAR){ */
1169 } else {
1170 tty_insert_flip_char(
1171 tty, 0,
1172 TTY_NORMAL);
1173 info->icount.rx++;
1175 } else {
1176 tty_insert_flip_char(tty, 0,
1177 TTY_NORMAL);
1178 info->icount.rx++;
1180 } else {
1181 /* there was a software buffer
1182 overrun and nothing could be
1183 done about it!!! */
1184 info->icount.buf_overrun++;
1185 info->idle_stats.overruns++;
1187 } else { /* normal character reception */
1188 /* load # chars available from the chip */
1189 char_count = cy_readb(base_addr +
1190 (CyRDCR << index));
1192 #ifdef CY_ENABLE_MONITORING
1193 ++info->mon.int_count;
1194 info->mon.char_count += char_count;
1195 if (char_count > info->mon.char_max)
1196 info->mon.char_max = char_count;
1197 info->mon.char_last = char_count;
1198 #endif
1199 len = tty_buffer_request_room(tty, char_count);
1200 while (len--) {
1201 data = cy_readb(base_addr +
1202 (CyRDSR << index));
1203 tty_insert_flip_char(tty, data,
1204 TTY_NORMAL);
1205 info->idle_stats.recv_bytes++;
1206 info->icount.rx++;
1207 #ifdef CY_16Y_HACK
1208 udelay(10L);
1209 #endif
1211 info->idle_stats.recv_idle = jiffies;
1213 tty_schedule_flip(tty);
1215 /* end of service */
1216 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1217 cy_writeb(base_addr + (CyCAR << index), (save_car));
1218 spin_unlock(&cinfo->card_lock);
1221 if (status & CySRTransmit) { /* transmission interrupt */
1222 /* Since we only get here when the transmit buffer
1223 is empty, we know we can always stuff a dozen
1224 characters. */
1225 #ifdef CY_DEBUG_INTERRUPTS
1226 printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
1227 #endif
1229 /* determine the channel & change to that context */
1230 spin_lock(&cinfo->card_lock);
1231 save_xir = (u_char) cy_readb(base_addr + (CyTIR << index));
1232 channel = (u_short) (save_xir & CyIRChannel);
1233 i = channel + chip * 4 + cinfo->first_line;
1234 save_car = cy_readb(base_addr + (CyCAR << index));
1235 cy_writeb(base_addr + (CyCAR << index), save_xir);
1237 /* validate the port# (as configured and open) */
1238 if ((i < 0) || (NR_PORTS <= i)) {
1239 cy_writeb(base_addr + (CySRER << index),
1240 cy_readb(base_addr + (CySRER << index)) &
1241 ~CyTxRdy);
1242 goto txend;
1244 info = &cy_port[i];
1245 info->last_active = jiffies;
1246 if (info->tty == 0) {
1247 cy_writeb(base_addr + (CySRER << index),
1248 cy_readb(base_addr + (CySRER << index)) &
1249 ~CyTxRdy);
1250 goto txdone;
1253 /* load the on-chip space for outbound data */
1254 char_count = info->xmit_fifo_size;
1256 if (info->x_char) { /* send special char */
1257 outch = info->x_char;
1258 cy_writeb(base_addr + (CyTDR << index), outch);
1259 char_count--;
1260 info->icount.tx++;
1261 info->x_char = 0;
1264 if (info->breakon || info->breakoff) {
1265 if (info->breakon) {
1266 cy_writeb(base_addr + (CyTDR << index), 0);
1267 cy_writeb(base_addr + (CyTDR << index), 0x81);
1268 info->breakon = 0;
1269 char_count -= 2;
1271 if (info->breakoff) {
1272 cy_writeb(base_addr + (CyTDR << index), 0);
1273 cy_writeb(base_addr + (CyTDR << index), 0x83);
1274 info->breakoff = 0;
1275 char_count -= 2;
1279 while (char_count-- > 0) {
1280 if (!info->xmit_cnt) {
1281 if (cy_readb(base_addr + (CySRER << index)) &
1282 CyTxMpty) {
1283 cy_writeb(base_addr + (CySRER << index),
1284 cy_readb(base_addr +
1285 (CySRER << index)) &
1286 ~CyTxMpty);
1287 } else {
1288 cy_writeb(base_addr + (CySRER << index),
1289 (cy_readb(base_addr +
1290 (CySRER << index)) &
1291 ~CyTxRdy) | CyTxMpty);
1293 goto txdone;
1295 if (info->xmit_buf == 0) {
1296 cy_writeb(base_addr + (CySRER << index),
1297 cy_readb(base_addr + (CySRER << index))&
1298 ~CyTxRdy);
1299 goto txdone;
1301 if (info->tty->stopped || info->tty->hw_stopped) {
1302 cy_writeb(base_addr + (CySRER << index),
1303 cy_readb(base_addr + (CySRER << index))&
1304 ~CyTxRdy);
1305 goto txdone;
1307 /* Because the Embedded Transmit Commands have
1308 been enabled, we must check to see if the
1309 escape character, NULL, is being sent. If it
1310 is, we must ensure that there is room for it
1311 to be doubled in the output stream. Therefore
1312 we no longer advance the pointer when the
1313 character is fetched, but rather wait until
1314 after the check for a NULL output character.
1315 This is necessary because there may not be
1316 room for the two chars needed to send a NULL.)
1318 outch = info->xmit_buf[info->xmit_tail];
1319 if (outch) {
1320 info->xmit_cnt--;
1321 info->xmit_tail = (info->xmit_tail + 1) &
1322 (SERIAL_XMIT_SIZE - 1);
1323 cy_writeb(base_addr + (CyTDR << index), outch);
1324 info->icount.tx++;
1325 } else {
1326 if (char_count > 1) {
1327 info->xmit_cnt--;
1328 info->xmit_tail = (info->xmit_tail + 1)&
1329 (SERIAL_XMIT_SIZE - 1);
1330 cy_writeb(base_addr + (CyTDR << index),
1331 outch);
1332 cy_writeb(base_addr + (CyTDR << index),
1334 info->icount.tx++;
1335 char_count--;
1336 } else {
1341 txdone:
1342 if (info->xmit_cnt < WAKEUP_CHARS) {
1343 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1345 txend:
1346 /* end of service */
1347 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1348 cy_writeb(base_addr + (CyCAR << index), (save_car));
1349 spin_unlock(&cinfo->card_lock);
1352 if (status & CySRModem) { /* modem interrupt */
1354 /* determine the channel & change to that context */
1355 spin_lock(&cinfo->card_lock);
1356 save_xir = (u_char) cy_readb(base_addr + (CyMIR << index));
1357 channel = (u_short) (save_xir & CyIRChannel);
1358 info = &cy_port[channel + chip * 4 + cinfo->first_line];
1359 info->last_active = jiffies;
1360 save_car = cy_readb(base_addr + (CyCAR << index));
1361 cy_writeb(base_addr + (CyCAR << index), save_xir);
1363 mdm_change = cy_readb(base_addr + (CyMISR << index));
1364 mdm_status = cy_readb(base_addr + (CyMSVR1 << index));
1366 if (info->tty == 0) { /* no place for data, ignore it */
1368 } else {
1369 if (mdm_change & CyANY_DELTA) {
1370 /* For statistics only */
1371 if (mdm_change & CyDCD)
1372 info->icount.dcd++;
1373 if (mdm_change & CyCTS)
1374 info->icount.cts++;
1375 if (mdm_change & CyDSR)
1376 info->icount.dsr++;
1377 if (mdm_change & CyRI)
1378 info->icount.rng++;
1380 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1383 if ((mdm_change & CyDCD) &&
1384 (info->flags & ASYNC_CHECK_CD)) {
1385 if (mdm_status & CyDCD) {
1386 cy_sched_event(info,
1387 Cy_EVENT_OPEN_WAKEUP);
1388 } else {
1389 cy_sched_event(info, Cy_EVENT_HANGUP);
1392 if ((mdm_change & CyCTS) &&
1393 (info->flags & ASYNC_CTS_FLOW)) {
1394 if (info->tty->hw_stopped) {
1395 if (mdm_status & CyCTS) {
1396 /* cy_start isn't used
1397 because... !!! */
1398 info->tty->hw_stopped = 0;
1399 cy_writeb(base_addr +
1400 (CySRER << index),
1401 cy_readb(base_addr +
1402 (CySRER <<
1403 index))|
1404 CyTxRdy);
1405 cy_sched_event(info,
1406 Cy_EVENT_WRITE_WAKEUP);
1408 } else {
1409 if (!(mdm_status & CyCTS)) {
1410 /* cy_stop isn't used
1411 because ... !!! */
1412 info->tty->hw_stopped = 1;
1413 cy_writeb(base_addr +
1414 (CySRER << index),
1415 cy_readb(base_addr +
1416 (CySRER <<
1417 index)) &
1418 ~CyTxRdy);
1422 if (mdm_change & CyDSR) {
1424 if (mdm_change & CyRI) {
1427 /* end of service */
1428 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1429 cy_writeb(base_addr + (CyCAR << index), save_car);
1430 spin_unlock(&cinfo->card_lock);
1434 /* The real interrupt service routine is called
1435 whenever the card wants its hand held--chars
1436 received, out buffer empty, modem change, etc.
1438 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1440 int status;
1441 struct cyclades_card *cinfo;
1442 void __iomem *base_addr, *card_base_addr;
1443 int chip;
1444 int index;
1445 int too_many;
1446 int had_work;
1448 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1449 #ifdef CY_DEBUG_INTERRUPTS
1450 printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
1451 #endif
1452 return IRQ_NONE; /* spurious interrupt */
1455 card_base_addr = cinfo->base_addr;
1456 index = cinfo->bus_index;
1458 /* This loop checks all chips in the card. Make a note whenever
1459 _any_ chip had some work to do, as this is considered an
1460 indication that there will be more to do. Only when no chip
1461 has any work does this outermost loop exit.
1463 do {
1464 had_work = 0;
1465 for (chip = 0; chip < cinfo->num_chips; chip++) {
1466 base_addr = cinfo->base_addr +
1467 (cy_chip_offset[chip] << index);
1468 too_many = 0;
1469 while ((status = cy_readb(base_addr +
1470 (CySVRR << index))) != 0x00) {
1471 had_work++;
1472 /* The purpose of the following test is to ensure that
1473 no chip can monopolize the driver. This forces the
1474 chips to be checked in a round-robin fashion (after
1475 draining each of a bunch (1000) of characters).
1477 if (1000 < too_many++) {
1478 break;
1480 cyy_intr_chip(cinfo, chip, base_addr, status,
1481 index);
1484 } while (had_work);
1486 /* clear interrupts */
1487 spin_lock(&cinfo->card_lock);
1488 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1489 /* Cy_ClrIntr is 0x1800 */
1490 spin_unlock(&cinfo->card_lock);
1491 return IRQ_HANDLED;
1492 } /* cyy_interrupt */
1494 /***********************************************************/
1495 /********* End of block of Cyclom-Y specific code **********/
1496 /******** Start of block of Cyclades-Z specific code *********/
1497 /***********************************************************/
1499 static int
1500 cyz_fetch_msg(struct cyclades_card *cinfo,
1501 uclong * channel, ucchar * cmd, uclong * param)
1503 struct FIRM_ID __iomem *firm_id;
1504 struct ZFW_CTRL __iomem *zfw_ctrl;
1505 struct BOARD_CTRL __iomem *board_ctrl;
1506 unsigned long loc_doorbell;
1508 firm_id = cinfo->base_addr + ID_ADDRESS;
1509 if (!ISZLOADED(*cinfo)) {
1510 return -1;
1512 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1513 0xfffff);
1514 board_ctrl = &zfw_ctrl->board_ctrl;
1516 loc_doorbell = cy_readl(&((struct RUNTIME_9060 __iomem *)
1517 (cinfo->ctl_addr))->loc_doorbell);
1518 if (loc_doorbell) {
1519 *cmd = (char)(0xff & loc_doorbell);
1520 *channel = cy_readl(&board_ctrl->fwcmd_channel);
1521 *param = (uclong) cy_readl(&board_ctrl->fwcmd_param);
1522 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1523 loc_doorbell, 0xffffffff);
1524 return 1;
1526 return 0;
1527 } /* cyz_fetch_msg */
1529 static int
1530 cyz_issue_cmd(struct cyclades_card *cinfo,
1531 uclong channel, ucchar cmd, uclong param)
1533 struct FIRM_ID __iomem *firm_id;
1534 struct ZFW_CTRL __iomem *zfw_ctrl;
1535 struct BOARD_CTRL __iomem *board_ctrl;
1536 unsigned long __iomem *pci_doorbell;
1537 int index;
1539 firm_id = cinfo->base_addr + ID_ADDRESS;
1540 if (!ISZLOADED(*cinfo)) {
1541 return -1;
1543 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1544 0xfffff);
1545 board_ctrl = &zfw_ctrl->board_ctrl;
1547 index = 0;
1548 pci_doorbell =
1549 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1550 while ((cy_readl(pci_doorbell) & 0xff) != 0) {
1551 if (index++ == 1000) {
1552 return (int)(cy_readl(pci_doorbell) & 0xff);
1554 udelay(50L);
1556 cy_writel(&board_ctrl->hcmd_channel, channel);
1557 cy_writel(&board_ctrl->hcmd_param, param);
1558 cy_writel(pci_doorbell, (long)cmd);
1560 return 0;
1561 } /* cyz_issue_cmd */
1563 static void
1564 cyz_handle_rx(struct cyclades_port *info,
1565 volatile struct CH_CTRL __iomem * ch_ctrl,
1566 volatile struct BUF_CTRL __iomem * buf_ctrl)
1568 struct cyclades_card *cinfo = &cy_card[info->card];
1569 struct tty_struct *tty = info->tty;
1570 volatile int char_count;
1571 int len;
1572 #ifdef BLOCKMOVE
1573 int small_count;
1574 #else
1575 char data;
1576 #endif
1577 volatile uclong rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1579 rx_get = new_rx_get = cy_readl(&buf_ctrl->rx_get);
1580 rx_put = cy_readl(&buf_ctrl->rx_put);
1581 rx_bufsize = cy_readl(&buf_ctrl->rx_bufsize);
1582 rx_bufaddr = cy_readl(&buf_ctrl->rx_bufaddr);
1583 if (rx_put >= rx_get)
1584 char_count = rx_put - rx_get;
1585 else
1586 char_count = rx_put - rx_get + rx_bufsize;
1588 if (char_count) {
1589 info->last_active = jiffies;
1590 info->jiffies[1] = jiffies;
1592 #ifdef CY_ENABLE_MONITORING
1593 info->mon.int_count++;
1594 info->mon.char_count += char_count;
1595 if (char_count > info->mon.char_max)
1596 info->mon.char_max = char_count;
1597 info->mon.char_last = char_count;
1598 #endif
1599 if (tty == 0) {
1600 /* flush received characters */
1601 new_rx_get = (new_rx_get + char_count) &
1602 (rx_bufsize - 1);
1603 info->rflush_count++;
1604 } else {
1605 #ifdef BLOCKMOVE
1606 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1607 for performance, but because of buffer boundaries, there
1608 may be several steps to the operation */
1609 while (0 < (small_count = min_t(unsigned int,
1610 rx_bufsize - new_rx_get,
1611 min_t(unsigned int, TTY_FLIPBUF_SIZE -
1612 tty->flip.count, char_count)))){
1613 memcpy_fromio(tty->flip.char_buf_ptr,
1614 (char *)(cinfo->base_addr + rx_bufaddr +
1615 new_rx_get),
1616 small_count);
1618 tty->flip.char_buf_ptr += small_count;
1619 memset(tty->flip.flag_buf_ptr, TTY_NORMAL,
1620 small_count);
1621 tty->flip.flag_buf_ptr += small_count;
1622 new_rx_get = (new_rx_get + small_count) &
1623 (rx_bufsize - 1);
1624 char_count -= small_count;
1625 info->icount.rx += small_count;
1626 info->idle_stats.recv_bytes += small_count;
1627 tty->flip.count += small_count;
1629 #else
1630 len = tty_buffer_request_room(tty, char_count);
1631 while (len--) {
1632 data = cy_readb(cinfo->base_addr + rx_bufaddr +
1633 new_rx_get);
1634 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1635 tty_insert_flip_char(tty, data, TTY_NORMAL);
1636 info->idle_stats.recv_bytes++;
1637 info->icount.rx++;
1639 #endif
1640 #ifdef CONFIG_CYZ_INTR
1641 /* Recalculate the number of chars in the RX buffer and issue
1642 a cmd in case it's higher than the RX high water mark */
1643 rx_put = cy_readl(&buf_ctrl->rx_put);
1644 if (rx_put >= rx_get)
1645 char_count = rx_put - rx_get;
1646 else
1647 char_count = rx_put - rx_get + rx_bufsize;
1648 if (char_count >= (int)cy_readl(&buf_ctrl->
1649 rx_threshold)) {
1650 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1652 #endif
1653 info->idle_stats.recv_idle = jiffies;
1654 tty_schedule_flip(tty);
1656 /* Update rx_get */
1657 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1661 static void
1662 cyz_handle_tx(struct cyclades_port *info,
1663 volatile struct CH_CTRL __iomem * ch_ctrl,
1664 volatile struct BUF_CTRL __iomem * buf_ctrl)
1666 struct cyclades_card *cinfo = &cy_card[info->card];
1667 struct tty_struct *tty = info->tty;
1668 char data;
1669 volatile int char_count;
1670 #ifdef BLOCKMOVE
1671 int small_count;
1672 #endif
1673 volatile uclong tx_put, tx_get, tx_bufsize, tx_bufaddr;
1675 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1676 return;
1678 tx_get = cy_readl(&buf_ctrl->tx_get);
1679 tx_put = cy_readl(&buf_ctrl->tx_put);
1680 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
1681 tx_bufaddr = cy_readl(&buf_ctrl->tx_bufaddr);
1682 if (tx_put >= tx_get)
1683 char_count = tx_get - tx_put - 1 + tx_bufsize;
1684 else
1685 char_count = tx_get - tx_put - 1;
1687 if (char_count) {
1689 if (tty == 0) {
1690 goto ztxdone;
1693 if (info->x_char) { /* send special char */
1694 data = info->x_char;
1696 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1697 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1698 info->x_char = 0;
1699 char_count--;
1700 info->icount.tx++;
1701 info->last_active = jiffies;
1702 info->jiffies[2] = jiffies;
1704 #ifdef BLOCKMOVE
1705 while (0 < (small_count = min_t(unsigned int,
1706 tx_bufsize - tx_put, min_t(unsigned int,
1707 (SERIAL_XMIT_SIZE - info->xmit_tail),
1708 min_t(unsigned int, info->xmit_cnt,
1709 char_count))))) {
1711 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1712 tx_put),
1713 &info->xmit_buf[info->xmit_tail],
1714 small_count);
1716 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1717 char_count -= small_count;
1718 info->icount.tx += small_count;
1719 info->xmit_cnt -= small_count;
1720 info->xmit_tail = (info->xmit_tail + small_count) &
1721 (SERIAL_XMIT_SIZE - 1);
1722 info->last_active = jiffies;
1723 info->jiffies[2] = jiffies;
1725 #else
1726 while (info->xmit_cnt && char_count) {
1727 data = info->xmit_buf[info->xmit_tail];
1728 info->xmit_cnt--;
1729 info->xmit_tail = (info->xmit_tail + 1) &
1730 (SERIAL_XMIT_SIZE - 1);
1732 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1733 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1734 char_count--;
1735 info->icount.tx++;
1736 info->last_active = jiffies;
1737 info->jiffies[2] = jiffies;
1739 #endif
1740 ztxdone:
1741 if (info->xmit_cnt < WAKEUP_CHARS) {
1742 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1744 /* Update tx_put */
1745 cy_writel(&buf_ctrl->tx_put, tx_put);
1749 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1751 struct tty_struct *tty;
1752 struct cyclades_port *info;
1753 static volatile struct FIRM_ID __iomem *firm_id;
1754 static volatile struct ZFW_CTRL __iomem *zfw_ctrl;
1755 static volatile struct BOARD_CTRL __iomem *board_ctrl;
1756 static volatile struct CH_CTRL __iomem *ch_ctrl;
1757 static volatile struct BUF_CTRL __iomem *buf_ctrl;
1758 uclong channel;
1759 ucchar cmd;
1760 uclong param;
1761 uclong hw_ver, fw_ver;
1762 int special_count;
1763 int delta_count;
1765 firm_id = cinfo->base_addr + ID_ADDRESS;
1766 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1767 0xfffff);
1768 board_ctrl = &zfw_ctrl->board_ctrl;
1769 fw_ver = cy_readl(&board_ctrl->fw_version);
1770 hw_ver = cy_readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1771 mail_box_0);
1773 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1774 special_count = 0;
1775 delta_count = 0;
1776 info = &cy_port[channel + cinfo->first_line];
1777 if ((tty = info->tty) == 0) {
1778 continue;
1780 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1781 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1783 switch (cmd) {
1784 case C_CM_PR_ERROR:
1785 tty_insert_flip_char(tty, 0, TTY_PARITY);
1786 info->icount.rx++;
1787 special_count++;
1788 break;
1789 case C_CM_FR_ERROR:
1790 tty_insert_flip_char(tty, 0, TTY_FRAME);
1791 info->icount.rx++;
1792 special_count++;
1793 break;
1794 case C_CM_RXBRK:
1795 tty_insert_flip_char(tty, 0, TTY_BREAK);
1796 info->icount.rx++;
1797 special_count++;
1798 break;
1799 case C_CM_MDCD:
1800 info->icount.dcd++;
1801 delta_count++;
1802 if (info->flags & ASYNC_CHECK_CD) {
1803 if ((fw_ver > 241 ? ((u_long) param) :
1804 cy_readl(&ch_ctrl->rs_status)) &
1805 C_RS_DCD) {
1806 cy_sched_event(info,
1807 Cy_EVENT_OPEN_WAKEUP);
1808 } else {
1809 cy_sched_event(info, Cy_EVENT_HANGUP);
1812 break;
1813 case C_CM_MCTS:
1814 info->icount.cts++;
1815 delta_count++;
1816 break;
1817 case C_CM_MRI:
1818 info->icount.rng++;
1819 delta_count++;
1820 break;
1821 case C_CM_MDSR:
1822 info->icount.dsr++;
1823 delta_count++;
1824 break;
1825 #ifdef Z_WAKE
1826 case C_CM_IOCTLW:
1827 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1828 break;
1829 #endif
1830 #ifdef CONFIG_CYZ_INTR
1831 case C_CM_RXHIWM:
1832 case C_CM_RXNNDT:
1833 case C_CM_INTBACK2:
1834 /* Reception Interrupt */
1835 #ifdef CY_DEBUG_INTERRUPTS
1836 printk("cyz_interrupt: rcvd intr, card %d, "
1837 "port %ld\n\r", info->card, channel);
1838 #endif
1839 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1840 break;
1841 case C_CM_TXBEMPTY:
1842 case C_CM_TXLOWWM:
1843 case C_CM_INTBACK:
1844 /* Transmission Interrupt */
1845 #ifdef CY_DEBUG_INTERRUPTS
1846 printk("cyz_interrupt: xmit intr, card %d, "
1847 "port %ld\n\r", info->card, channel);
1848 #endif
1849 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1850 break;
1851 #endif /* CONFIG_CYZ_INTR */
1852 case C_CM_FATAL:
1853 /* should do something with this !!! */
1854 break;
1855 default:
1856 break;
1858 if (delta_count)
1859 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1860 if (special_count)
1861 tty_schedule_flip(tty);
1865 #ifdef CONFIG_CYZ_INTR
1866 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1868 struct cyclades_card *cinfo;
1870 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1871 #ifdef CY_DEBUG_INTERRUPTS
1872 printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
1873 #endif
1874 return IRQ_NONE; /* spurious interrupt */
1877 if (!ISZLOADED(*cinfo)) {
1878 #ifdef CY_DEBUG_INTERRUPTS
1879 printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq);
1880 #endif
1881 return IRQ_NONE;
1884 /* Handle the interrupts */
1885 cyz_handle_cmd(cinfo);
1887 return IRQ_HANDLED;
1888 } /* cyz_interrupt */
1890 static void cyz_rx_restart(unsigned long arg)
1892 struct cyclades_port *info = (struct cyclades_port *)arg;
1893 int retval;
1894 int card = info->card;
1895 uclong channel = (info->line) - (cy_card[card].first_line);
1896 unsigned long flags;
1898 CY_LOCK(info, flags);
1899 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
1900 if (retval != 0) {
1901 printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1902 info->line, retval);
1904 cyz_rx_full_timer[info->line].function = NULL;
1905 CY_UNLOCK(info, flags);
1908 #else /* CONFIG_CYZ_INTR */
1910 static void cyz_poll(unsigned long arg)
1912 struct cyclades_card *cinfo;
1913 struct cyclades_port *info;
1914 struct tty_struct *tty;
1915 static volatile struct FIRM_ID *firm_id;
1916 static volatile struct ZFW_CTRL *zfw_ctrl;
1917 static volatile struct BOARD_CTRL *board_ctrl;
1918 static volatile struct CH_CTRL *ch_ctrl;
1919 static volatile struct BUF_CTRL *buf_ctrl;
1920 int card, port;
1922 cyz_timerlist.expires = jiffies + (HZ);
1923 for (card = 0; card < NR_CARDS; card++) {
1924 cinfo = &cy_card[card];
1926 if (!IS_CYC_Z(*cinfo))
1927 continue;
1928 if (!ISZLOADED(*cinfo))
1929 continue;
1931 firm_id = cinfo->base_addr + ID_ADDRESS;
1932 zfw_ctrl = cinfo->base_addr +
1933 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1934 board_ctrl = &(zfw_ctrl->board_ctrl);
1936 /* Skip first polling cycle to avoid racing conditions with the FW */
1937 if (!cinfo->intr_enabled) {
1938 cinfo->nports = (int)cy_readl(&board_ctrl->n_channel);
1939 cinfo->intr_enabled = 1;
1940 continue;
1943 cyz_handle_cmd(cinfo);
1945 for (port = 0; port < cinfo->nports; port++) {
1946 info = &cy_port[port + cinfo->first_line];
1947 tty = info->tty;
1948 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1949 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1951 if (!info->throttle)
1952 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1953 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1955 /* poll every 'cyz_polling_cycle' period */
1956 cyz_timerlist.expires = jiffies + cyz_polling_cycle;
1958 add_timer(&cyz_timerlist);
1959 } /* cyz_poll */
1961 #endif /* CONFIG_CYZ_INTR */
1963 /********** End of block of Cyclades-Z specific code *********/
1964 /***********************************************************/
1966 /* This is called whenever a port becomes active;
1967 interrupts are enabled and DTR & RTS are turned on.
1969 static int startup(struct cyclades_port *info)
1971 unsigned long flags;
1972 int retval = 0;
1973 void __iomem *base_addr;
1974 int card, chip, channel, index;
1975 unsigned long page;
1977 card = info->card;
1978 channel = (info->line) - (cy_card[card].first_line);
1980 page = get_zeroed_page(GFP_KERNEL);
1981 if (!page)
1982 return -ENOMEM;
1984 CY_LOCK(info, flags);
1986 if (info->flags & ASYNC_INITIALIZED) {
1987 free_page(page);
1988 goto errout;
1991 if (!info->type) {
1992 if (info->tty) {
1993 set_bit(TTY_IO_ERROR, &info->tty->flags);
1995 free_page(page);
1996 goto errout;
1999 if (info->xmit_buf)
2000 free_page(page);
2001 else
2002 info->xmit_buf = (unsigned char *)page;
2004 CY_UNLOCK(info, flags);
2006 set_line_char(info);
2008 if (!IS_CYC_Z(cy_card[card])) {
2009 chip = channel >> 2;
2010 channel &= 0x03;
2011 index = cy_card[card].bus_index;
2012 base_addr = cy_card[card].base_addr +
2013 (cy_chip_offset[chip] << index);
2015 #ifdef CY_DEBUG_OPEN
2016 printk("cyc startup card %d, chip %d, channel %d, "
2017 "base_addr %lx\n",
2018 card, chip, channel, (long)base_addr);
2019 /**/
2020 #endif
2021 CY_LOCK(info, flags);
2023 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2025 cy_writeb(base_addr + (CyRTPR << index),
2026 (info->default_timeout ? info->default_timeout : 0x02));
2027 /* 10ms rx timeout */
2029 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
2030 index);
2032 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2033 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
2034 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
2036 #ifdef CY_DEBUG_DTR
2037 printk("cyc:startup raising DTR\n");
2038 printk(" status: 0x%x, 0x%x\n",
2039 cy_readb(base_addr + (CyMSVR1 << index)),
2040 cy_readb(base_addr + (CyMSVR2 << index)));
2041 #endif
2043 cy_writeb(base_addr + (CySRER << index),
2044 cy_readb(base_addr + (CySRER << index)) | CyRxData);
2045 info->flags |= ASYNC_INITIALIZED;
2047 if (info->tty) {
2048 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2050 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2051 info->breakon = info->breakoff = 0;
2052 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2053 info->idle_stats.in_use =
2054 info->idle_stats.recv_idle =
2055 info->idle_stats.xmit_idle = jiffies;
2057 CY_UNLOCK(info, flags);
2059 } else {
2060 struct FIRM_ID __iomem *firm_id;
2061 struct ZFW_CTRL __iomem *zfw_ctrl;
2062 struct BOARD_CTRL __iomem *board_ctrl;
2063 struct CH_CTRL __iomem *ch_ctrl;
2064 int retval;
2066 base_addr = cy_card[card].base_addr;
2068 firm_id = base_addr + ID_ADDRESS;
2069 if (!ISZLOADED(cy_card[card])) {
2070 return -ENODEV;
2073 zfw_ctrl = cy_card[card].base_addr +
2074 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2075 board_ctrl = &zfw_ctrl->board_ctrl;
2076 ch_ctrl = zfw_ctrl->ch_ctrl;
2078 #ifdef CY_DEBUG_OPEN
2079 printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
2080 card, channel, (long)base_addr);
2081 /**/
2082 #endif
2083 CY_LOCK(info, flags);
2085 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2086 #ifdef Z_WAKE
2087 #ifdef CONFIG_CYZ_INTR
2088 cy_writel(&ch_ctrl[channel].intr_enable,
2089 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2090 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
2091 #else
2092 cy_writel(&ch_ctrl[channel].intr_enable,
2093 C_IN_IOCTLW | C_IN_MDCD);
2094 #endif /* CONFIG_CYZ_INTR */
2095 #else
2096 #ifdef CONFIG_CYZ_INTR
2097 cy_writel(&ch_ctrl[channel].intr_enable,
2098 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2099 C_IN_RXNNDT | C_IN_MDCD);
2100 #else
2101 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2102 #endif /* CONFIG_CYZ_INTR */
2103 #endif /* Z_WAKE */
2105 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
2106 if (retval != 0) {
2107 printk("cyc:startup(1) retval on ttyC%d was %x\n",
2108 info->line, retval);
2111 /* Flush RX buffers before raising DTR and RTS */
2112 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX,
2113 0L);
2114 if (retval != 0) {
2115 printk("cyc:startup(2) retval on ttyC%d was %x\n",
2116 info->line, retval);
2119 /* set timeout !!! */
2120 /* set RTS and DTR !!! */
2121 cy_writel(&ch_ctrl[channel].rs_control,
2122 cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2123 C_RS_DTR);
2124 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2125 C_CM_IOCTLM, 0L);
2126 if (retval != 0) {
2127 printk("cyc:startup(3) retval on ttyC%d was %x\n",
2128 info->line, retval);
2130 #ifdef CY_DEBUG_DTR
2131 printk("cyc:startup raising Z DTR\n");
2132 #endif
2134 /* enable send, recv, modem !!! */
2136 info->flags |= ASYNC_INITIALIZED;
2137 if (info->tty) {
2138 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2140 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2141 info->breakon = info->breakoff = 0;
2142 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2143 info->idle_stats.in_use =
2144 info->idle_stats.recv_idle =
2145 info->idle_stats.xmit_idle = jiffies;
2147 CY_UNLOCK(info, flags);
2150 #ifdef CY_DEBUG_OPEN
2151 printk(" cyc startup done\n");
2152 #endif
2153 return 0;
2155 errout:
2156 CY_UNLOCK(info, flags);
2157 return retval;
2158 } /* startup */
2160 static void start_xmit(struct cyclades_port *info)
2162 unsigned long flags;
2163 void __iomem *base_addr;
2164 int card, chip, channel, index;
2166 card = info->card;
2167 channel = (info->line) - (cy_card[card].first_line);
2168 if (!IS_CYC_Z(cy_card[card])) {
2169 chip = channel >> 2;
2170 channel &= 0x03;
2171 index = cy_card[card].bus_index;
2172 base_addr = cy_card[card].base_addr +
2173 (cy_chip_offset[chip] << index);
2175 CY_LOCK(info, flags);
2176 cy_writeb(base_addr + (CyCAR << index), channel);
2177 cy_writeb(base_addr + (CySRER << index),
2178 cy_readb(base_addr + (CySRER << index)) | CyTxRdy);
2179 CY_UNLOCK(info, flags);
2180 } else {
2181 #ifdef CONFIG_CYZ_INTR
2182 int retval;
2184 CY_LOCK(info, flags);
2185 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK,
2186 0L);
2187 if (retval != 0) {
2188 printk("cyc:start_xmit retval on ttyC%d was %x\n",
2189 info->line, retval);
2191 CY_UNLOCK(info, flags);
2192 #else /* CONFIG_CYZ_INTR */
2193 /* Don't have to do anything at this time */
2194 #endif /* CONFIG_CYZ_INTR */
2196 } /* start_xmit */
2199 * This routine shuts down a serial port; interrupts are disabled,
2200 * and DTR is dropped if the hangup on close termio flag is on.
2202 static void shutdown(struct cyclades_port *info)
2204 unsigned long flags;
2205 void __iomem *base_addr;
2206 int card, chip, channel, index;
2208 if (!(info->flags & ASYNC_INITIALIZED)) {
2209 return;
2212 card = info->card;
2213 channel = info->line - cy_card[card].first_line;
2214 if (!IS_CYC_Z(cy_card[card])) {
2215 chip = channel >> 2;
2216 channel &= 0x03;
2217 index = cy_card[card].bus_index;
2218 base_addr = cy_card[card].base_addr +
2219 (cy_chip_offset[chip] << index);
2221 #ifdef CY_DEBUG_OPEN
2222 printk("cyc shutdown Y card %d, chip %d, channel %d, "
2223 "base_addr %lx\n",
2224 card, chip, channel, (long)base_addr);
2225 #endif
2227 CY_LOCK(info, flags);
2229 /* Clear delta_msr_wait queue to avoid mem leaks. */
2230 wake_up_interruptible(&info->delta_msr_wait);
2232 if (info->xmit_buf) {
2233 unsigned char *temp;
2234 temp = info->xmit_buf;
2235 info->xmit_buf = NULL;
2236 free_page((unsigned long)temp);
2238 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2239 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2240 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2241 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2242 #ifdef CY_DEBUG_DTR
2243 printk("cyc shutdown dropping DTR\n");
2244 printk(" status: 0x%x, 0x%x\n",
2245 cy_readb(base_addr + (CyMSVR1 << index)),
2246 cy_readb(base_addr + (CyMSVR2 << index)));
2247 #endif
2249 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2250 /* it may be appropriate to clear _XMIT at
2251 some later date (after testing)!!! */
2253 if (info->tty) {
2254 set_bit(TTY_IO_ERROR, &info->tty->flags);
2256 info->flags &= ~ASYNC_INITIALIZED;
2257 CY_UNLOCK(info, flags);
2258 } else {
2259 struct FIRM_ID __iomem *firm_id;
2260 struct ZFW_CTRL __iomem *zfw_ctrl;
2261 struct BOARD_CTRL __iomem *board_ctrl;
2262 struct CH_CTRL __iomem *ch_ctrl;
2263 int retval;
2265 base_addr = cy_card[card].base_addr;
2266 #ifdef CY_DEBUG_OPEN
2267 printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
2268 card, channel, (long)base_addr);
2269 #endif
2271 firm_id = base_addr + ID_ADDRESS;
2272 if (!ISZLOADED(cy_card[card])) {
2273 return;
2276 zfw_ctrl = cy_card[card].base_addr +
2277 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2278 board_ctrl = &zfw_ctrl->board_ctrl;
2279 ch_ctrl = zfw_ctrl->ch_ctrl;
2281 CY_LOCK(info, flags);
2283 if (info->xmit_buf) {
2284 unsigned char *temp;
2285 temp = info->xmit_buf;
2286 info->xmit_buf = NULL;
2287 free_page((unsigned long)temp);
2290 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2291 cy_writel(&ch_ctrl[channel].rs_control,
2292 (uclong)(cy_readl(&ch_ctrl[channel].rs_control)&
2293 ~(C_RS_RTS | C_RS_DTR)));
2294 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2295 C_CM_IOCTLM, 0L);
2296 if (retval != 0) {
2297 printk("cyc:shutdown retval on ttyC%d was %x\n",
2298 info->line, retval);
2300 #ifdef CY_DEBUG_DTR
2301 printk("cyc:shutdown dropping Z DTR\n");
2302 #endif
2305 if (info->tty) {
2306 set_bit(TTY_IO_ERROR, &info->tty->flags);
2308 info->flags &= ~ASYNC_INITIALIZED;
2310 CY_UNLOCK(info, flags);
2313 #ifdef CY_DEBUG_OPEN
2314 printk(" cyc shutdown done\n");
2315 #endif
2316 } /* shutdown */
2319 * ------------------------------------------------------------
2320 * cy_open() and friends
2321 * ------------------------------------------------------------
2324 static int
2325 block_til_ready(struct tty_struct *tty, struct file *filp,
2326 struct cyclades_port *info)
2328 DECLARE_WAITQUEUE(wait, current);
2329 struct cyclades_card *cinfo;
2330 unsigned long flags;
2331 int chip, channel, index;
2332 int retval;
2333 void __iomem *base_addr;
2335 cinfo = &cy_card[info->card];
2336 channel = info->line - cinfo->first_line;
2339 * If the device is in the middle of being closed, then block
2340 * until it's done, and then try again.
2342 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2343 if (info->flags & ASYNC_CLOSING) {
2344 interruptible_sleep_on(&info->close_wait);
2346 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2350 * If non-blocking mode is set, then make the check up front
2351 * and then exit.
2353 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2354 info->flags |= ASYNC_NORMAL_ACTIVE;
2355 return 0;
2359 * Block waiting for the carrier detect and the line to become
2360 * free (i.e., not in use by the callout). While we are in
2361 * this loop, info->count is dropped by one, so that
2362 * cy_close() knows when to free things. We restore it upon
2363 * exit, either normal or abnormal.
2365 retval = 0;
2366 add_wait_queue(&info->open_wait, &wait);
2367 #ifdef CY_DEBUG_OPEN
2368 printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
2369 info->line, info->count);
2370 /**/
2371 #endif
2372 CY_LOCK(info, flags);
2373 if (!tty_hung_up_p(filp))
2374 info->count--;
2375 CY_UNLOCK(info, flags);
2376 #ifdef CY_DEBUG_COUNT
2377 printk("cyc block_til_ready: (%d): decrementing count to %d\n",
2378 current->pid, info->count);
2379 #endif
2380 info->blocked_open++;
2382 if (!IS_CYC_Z(*cinfo)) {
2383 chip = channel >> 2;
2384 channel &= 0x03;
2385 index = cinfo->bus_index;
2386 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2388 while (1) {
2389 CY_LOCK(info, flags);
2390 if ((tty->termios->c_cflag & CBAUD)) {
2391 cy_writeb(base_addr + (CyCAR << index),
2392 (u_char) channel);
2393 cy_writeb(base_addr + (CyMSVR1 << index),
2394 CyRTS);
2395 cy_writeb(base_addr + (CyMSVR2 << index),
2396 CyDTR);
2397 #ifdef CY_DEBUG_DTR
2398 printk("cyc:block_til_ready raising DTR\n");
2399 printk(" status: 0x%x, 0x%x\n",
2400 cy_readb(base_addr +
2401 (CyMSVR1 << index)),
2402 cy_readb(base_addr +
2403 (CyMSVR2 << index)));
2404 #endif
2406 CY_UNLOCK(info, flags);
2408 set_current_state(TASK_INTERRUPTIBLE);
2409 if (tty_hung_up_p(filp) ||
2410 !(info->flags & ASYNC_INITIALIZED)) {
2411 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2412 -EAGAIN : -ERESTARTSYS);
2413 break;
2416 CY_LOCK(info, flags);
2417 cy_writeb(base_addr + (CyCAR << index),
2418 (u_char) channel);
2419 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2420 (cy_readb(base_addr +
2421 (CyMSVR1 << index)) & CyDCD))) {
2422 CY_UNLOCK(info, flags);
2423 break;
2425 CY_UNLOCK(info, flags);
2427 if (signal_pending(current)) {
2428 retval = -ERESTARTSYS;
2429 break;
2431 #ifdef CY_DEBUG_OPEN
2432 printk("cyc block_til_ready blocking: ttyC%d, "
2433 "count = %d\n",
2434 info->line, info->count);
2435 /**/
2436 #endif
2437 schedule();
2439 } else {
2440 struct FIRM_ID __iomem *firm_id;
2441 struct ZFW_CTRL __iomem *zfw_ctrl;
2442 struct BOARD_CTRL __iomem *board_ctrl;
2443 struct CH_CTRL __iomem *ch_ctrl;
2444 int retval;
2446 base_addr = cinfo->base_addr;
2447 firm_id = base_addr + ID_ADDRESS;
2448 if (!ISZLOADED(*cinfo)) {
2449 current->state = TASK_RUNNING;
2450 remove_wait_queue(&info->open_wait, &wait);
2451 return -EINVAL;
2454 zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
2455 0xfffff);
2456 board_ctrl = &zfw_ctrl->board_ctrl;
2457 ch_ctrl = zfw_ctrl->ch_ctrl;
2459 while (1) {
2460 if ((tty->termios->c_cflag & CBAUD)) {
2461 cy_writel(&ch_ctrl[channel].rs_control,
2462 cy_readl(&ch_ctrl[channel].
2463 rs_control) | (C_RS_RTS |
2464 C_RS_DTR));
2465 retval = cyz_issue_cmd(&cy_card[info->card],
2466 channel, C_CM_IOCTLM, 0L);
2467 if (retval != 0) {
2468 printk("cyc:block_til_ready retval on "
2469 "ttyC%d was %x\n",
2470 info->line, retval);
2472 #ifdef CY_DEBUG_DTR
2473 printk("cyc:block_til_ready raising Z DTR\n");
2474 #endif
2477 set_current_state(TASK_INTERRUPTIBLE);
2478 if (tty_hung_up_p(filp) ||
2479 !(info->flags & ASYNC_INITIALIZED)) {
2480 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2481 -EAGAIN : -ERESTARTSYS);
2482 break;
2484 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2485 (cy_readl(&ch_ctrl[channel].rs_status) &
2486 C_RS_DCD))) {
2487 break;
2489 if (signal_pending(current)) {
2490 retval = -ERESTARTSYS;
2491 break;
2493 #ifdef CY_DEBUG_OPEN
2494 printk("cyc block_til_ready blocking: ttyC%d, "
2495 "count = %d\n",
2496 info->line, info->count);
2497 /**/
2498 #endif
2499 schedule();
2502 current->state = TASK_RUNNING;
2503 remove_wait_queue(&info->open_wait, &wait);
2504 if (!tty_hung_up_p(filp)) {
2505 info->count++;
2506 #ifdef CY_DEBUG_COUNT
2507 printk("cyc:block_til_ready (%d): incrementing count to %d\n",
2508 current->pid, info->count);
2509 #endif
2511 info->blocked_open--;
2512 #ifdef CY_DEBUG_OPEN
2513 printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
2514 info->line, info->count);
2515 /**/
2516 #endif
2517 if (retval)
2518 return retval;
2519 info->flags |= ASYNC_NORMAL_ACTIVE;
2520 return 0;
2521 } /* block_til_ready */
2524 * This routine is called whenever a serial port is opened. It
2525 * performs the serial-specific initialization for the tty structure.
2527 static int cy_open(struct tty_struct *tty, struct file *filp)
2529 struct cyclades_port *info;
2530 int retval, line;
2532 line = tty->index;
2533 if ((line < 0) || (NR_PORTS <= line)) {
2534 return -ENODEV;
2536 info = &cy_port[line];
2537 if (info->line < 0) {
2538 return -ENODEV;
2541 /* If the card's firmware hasn't been loaded,
2542 treat it as absent from the system. This
2543 will make the user pay attention.
2545 if (IS_CYC_Z(cy_card[info->card])) {
2546 struct cyclades_card *cinfo = &cy_card[info->card];
2547 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2549 if (!ISZLOADED(*cinfo)) {
2550 if (((ZE_V1 == cy_readl(
2551 &((struct RUNTIME_9060 __iomem *)
2552 (cinfo->ctl_addr))->mail_box_0)) &&
2553 Z_FPGA_CHECK(*cinfo)) &&
2554 (ZFIRM_HLT == cy_readl(
2555 &firm_id->signature))) {
2556 printk("cyc:Cyclades-Z Error: you need an "
2557 "external power supply for this number "
2558 "of ports.\n\rFirmware halted.\r\n");
2559 } else {
2560 printk("cyc:Cyclades-Z firmware not yet "
2561 "loaded\n");
2563 return -ENODEV;
2565 #ifdef CONFIG_CYZ_INTR
2566 else {
2567 /* In case this Z board is operating in interrupt mode, its
2568 interrupts should be enabled as soon as the first open
2569 happens to one of its ports. */
2570 if (!cinfo->intr_enabled) {
2571 struct ZFW_CTRL __iomem *zfw_ctrl;
2572 struct BOARD_CTRL __iomem *board_ctrl;
2574 zfw_ctrl = cinfo->base_addr +
2575 (cy_readl(&firm_id->zfwctrl_addr) &
2576 0xfffff);
2578 board_ctrl = &zfw_ctrl->board_ctrl;
2580 /* Enable interrupts on the PLX chip */
2581 cy_writew(cinfo->ctl_addr + 0x68,
2582 cy_readw(cinfo->ctl_addr +
2583 0x68) | 0x0900);
2584 /* Enable interrupts on the FW */
2585 retval = cyz_issue_cmd(cinfo, 0,
2586 C_CM_IRQ_ENBL, 0L);
2587 if (retval != 0) {
2588 printk("cyc:IRQ enable retval was %x\n",
2589 retval);
2591 cinfo->nports =
2592 (int)cy_readl(&board_ctrl->n_channel);
2593 cinfo->intr_enabled = 1;
2596 #endif /* CONFIG_CYZ_INTR */
2597 /* Make sure this Z port really exists in hardware */
2598 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2599 return -ENODEV;
2601 #ifdef CY_DEBUG_OTHER
2602 printk("cyc:cy_open ttyC%d\n", info->line); /* */
2603 #endif
2604 tty->driver_data = info;
2605 info->tty = tty;
2606 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2607 return -ENODEV;
2609 #ifdef CY_DEBUG_OPEN
2610 printk("cyc:cy_open ttyC%d, count = %d\n", info->line, info->count);
2611 /**/
2612 #endif
2613 info->count++;
2614 #ifdef CY_DEBUG_COUNT
2615 printk("cyc:cy_open (%d): incrementing count to %d\n",
2616 current->pid, info->count);
2617 #endif
2620 * If the port is the middle of closing, bail out now
2622 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2623 if (info->flags & ASYNC_CLOSING)
2624 interruptible_sleep_on(&info->close_wait);
2625 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2629 * Start up serial port
2631 retval = startup(info);
2632 if (retval) {
2633 return retval;
2636 retval = block_til_ready(tty, filp, info);
2637 if (retval) {
2638 #ifdef CY_DEBUG_OPEN
2639 printk("cyc:cy_open returning after block_til_ready with %d\n",
2640 retval);
2641 #endif
2642 return retval;
2645 info->throttle = 0;
2647 #ifdef CY_DEBUG_OPEN
2648 printk(" cyc:cy_open done\n");
2649 /**/
2650 #endif
2651 return 0;
2652 } /* cy_open */
2655 * cy_wait_until_sent() --- wait until the transmitter is empty
2657 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2659 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2660 void __iomem *base_addr;
2661 int card, chip, channel, index;
2662 unsigned long orig_jiffies;
2663 int char_time;
2665 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2666 return;
2668 if (info->xmit_fifo_size == 0)
2669 return; /* Just in case.... */
2671 orig_jiffies = jiffies;
2673 * Set the check interval to be 1/5 of the estimated time to
2674 * send a single character, and make it at least 1. The check
2675 * interval should also be less than the timeout.
2677 * Note: we have to use pretty tight timings here to satisfy
2678 * the NIST-PCTS.
2680 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2681 char_time = char_time / 5;
2682 if (char_time <= 0)
2683 char_time = 1;
2684 if (timeout < 0)
2685 timeout = 0;
2686 if (timeout)
2687 char_time = min(char_time, timeout);
2689 * If the transmitter hasn't cleared in twice the approximate
2690 * amount of time to send the entire FIFO, it probably won't
2691 * ever clear. This assumes the UART isn't doing flow
2692 * control, which is currently the case. Hence, if it ever
2693 * takes longer than info->timeout, this is probably due to a
2694 * UART bug of some kind. So, we clamp the timeout parameter at
2695 * 2*info->timeout.
2697 if (!timeout || timeout > 2 * info->timeout)
2698 timeout = 2 * info->timeout;
2699 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2700 printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
2701 printk("jiff=%lu...", jiffies);
2702 #endif
2703 card = info->card;
2704 channel = (info->line) - (cy_card[card].first_line);
2705 if (!IS_CYC_Z(cy_card[card])) {
2706 chip = channel >> 2;
2707 channel &= 0x03;
2708 index = cy_card[card].bus_index;
2709 base_addr =
2710 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
2711 while (cy_readb(base_addr + (CySRER << index)) & CyTxRdy) {
2712 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2713 printk("Not clean (jiff=%lu)...", jiffies);
2714 #endif
2715 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2716 break;
2717 if (timeout && time_after(jiffies, orig_jiffies +
2718 timeout))
2719 break;
2721 } else {
2722 /* Nothing to do! */
2724 /* Run one more char cycle */
2725 msleep_interruptible(jiffies_to_msecs(char_time * 5));
2726 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2727 printk("Clean (jiff=%lu)...done\n", jiffies);
2728 #endif
2732 * This routine is called when a particular tty device is closed.
2734 static void cy_close(struct tty_struct *tty, struct file *filp)
2736 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2737 unsigned long flags;
2739 #ifdef CY_DEBUG_OTHER
2740 printk("cyc:cy_close ttyC%d\n", info->line);
2741 #endif
2743 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2744 return;
2747 CY_LOCK(info, flags);
2748 /* If the TTY is being hung up, nothing to do */
2749 if (tty_hung_up_p(filp)) {
2750 CY_UNLOCK(info, flags);
2751 return;
2753 #ifdef CY_DEBUG_OPEN
2754 printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
2755 #endif
2756 if ((tty->count == 1) && (info->count != 1)) {
2758 * Uh, oh. tty->count is 1, which means that the tty
2759 * structure will be freed. Info->count should always
2760 * be one in these conditions. If it's greater than
2761 * one, we've got real problems, since it means the
2762 * serial port won't be shutdown.
2764 printk("cyc:cy_close: bad serial port count; tty->count is 1, "
2765 "info->count is %d\n", info->count);
2766 info->count = 1;
2768 #ifdef CY_DEBUG_COUNT
2769 printk("cyc:cy_close at (%d): decrementing count to %d\n",
2770 current->pid, info->count - 1);
2771 #endif
2772 if (--info->count < 0) {
2773 #ifdef CY_DEBUG_COUNT
2774 printk("cyc:cyc_close setting count to 0\n");
2775 #endif
2776 info->count = 0;
2778 if (info->count) {
2779 CY_UNLOCK(info, flags);
2780 return;
2782 info->flags |= ASYNC_CLOSING;
2785 * Now we wait for the transmit buffer to clear; and we notify
2786 * the line discipline to only process XON/XOFF characters.
2788 tty->closing = 1;
2789 CY_UNLOCK(info, flags);
2790 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2791 tty_wait_until_sent(tty, info->closing_wait);
2793 CY_LOCK(info, flags);
2795 if (!IS_CYC_Z(cy_card[info->card])) {
2796 int channel = info->line - cy_card[info->card].first_line;
2797 int index = cy_card[info->card].bus_index;
2798 void __iomem *base_addr = cy_card[info->card].base_addr +
2799 (cy_chip_offset[channel >> 2] << index);
2800 /* Stop accepting input */
2801 channel &= 0x03;
2802 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2803 cy_writeb(base_addr + (CySRER << index),
2804 cy_readb(base_addr + (CySRER << index)) & ~CyRxData);
2805 if (info->flags & ASYNC_INITIALIZED) {
2806 /* Waiting for on-board buffers to be empty before closing
2807 the port */
2808 CY_UNLOCK(info, flags);
2809 cy_wait_until_sent(tty, info->timeout);
2810 CY_LOCK(info, flags);
2812 } else {
2813 #ifdef Z_WAKE
2814 /* Waiting for on-board buffers to be empty before closing the port */
2815 void __iomem *base_addr = cy_card[info->card].base_addr;
2816 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2817 struct ZFW_CTRL __iomem *zfw_ctrl =
2818 base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2819 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2820 int channel = info->line - cy_card[info->card].first_line;
2821 int retval;
2823 if (cy_readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2824 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2825 C_CM_IOCTLW, 0L);
2826 if (retval != 0) {
2827 printk("cyc:cy_close retval on ttyC%d was %x\n",
2828 info->line, retval);
2830 CY_UNLOCK(info, flags);
2831 interruptible_sleep_on(&info->shutdown_wait);
2832 CY_LOCK(info, flags);
2834 #endif
2837 CY_UNLOCK(info, flags);
2838 shutdown(info);
2839 if (tty->driver->flush_buffer)
2840 tty->driver->flush_buffer(tty);
2841 tty_ldisc_flush(tty);
2842 CY_LOCK(info, flags);
2844 tty->closing = 0;
2845 info->event = 0;
2846 info->tty = NULL;
2847 if (info->blocked_open) {
2848 CY_UNLOCK(info, flags);
2849 if (info->close_delay) {
2850 msleep_interruptible(jiffies_to_msecs
2851 (info->close_delay));
2853 wake_up_interruptible(&info->open_wait);
2854 CY_LOCK(info, flags);
2856 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2857 wake_up_interruptible(&info->close_wait);
2859 #ifdef CY_DEBUG_OTHER
2860 printk(" cyc:cy_close done\n");
2861 #endif
2863 CY_UNLOCK(info, flags);
2864 } /* cy_close */
2866 /* This routine gets called when tty_write has put something into
2867 * the write_queue. The characters may come from user space or
2868 * kernel space.
2870 * This routine will return the number of characters actually
2871 * accepted for writing.
2873 * If the port is not already transmitting stuff, start it off by
2874 * enabling interrupts. The interrupt service routine will then
2875 * ensure that the characters are sent.
2876 * If the port is already active, there is no need to kick it.
2879 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2881 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2882 unsigned long flags;
2883 int c, ret = 0;
2885 #ifdef CY_DEBUG_IO
2886 printk("cyc:cy_write ttyC%d\n", info->line); /* */
2887 #endif
2889 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2890 return 0;
2893 if (!info->xmit_buf)
2894 return 0;
2896 CY_LOCK(info, flags);
2897 while (1) {
2898 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2899 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2901 if (c <= 0)
2902 break;
2904 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2905 info->xmit_head = (info->xmit_head + c) &
2906 (SERIAL_XMIT_SIZE - 1);
2907 info->xmit_cnt += c;
2908 buf += c;
2909 count -= c;
2910 ret += c;
2912 CY_UNLOCK(info, flags);
2914 info->idle_stats.xmit_bytes += ret;
2915 info->idle_stats.xmit_idle = jiffies;
2917 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2918 start_xmit(info);
2920 return ret;
2921 } /* cy_write */
2924 * This routine is called by the kernel to write a single
2925 * character to the tty device. If the kernel uses this routine,
2926 * it must call the flush_chars() routine (if defined) when it is
2927 * done stuffing characters into the driver. If there is no room
2928 * in the queue, the character is ignored.
2930 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2932 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2933 unsigned long flags;
2935 #ifdef CY_DEBUG_IO
2936 printk("cyc:cy_put_char ttyC%d\n", info->line);
2937 #endif
2939 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2940 return;
2942 if (!info->xmit_buf)
2943 return;
2945 CY_LOCK(info, flags);
2946 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2947 CY_UNLOCK(info, flags);
2948 return;
2951 info->xmit_buf[info->xmit_head++] = ch;
2952 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2953 info->xmit_cnt++;
2954 info->idle_stats.xmit_bytes++;
2955 info->idle_stats.xmit_idle = jiffies;
2956 CY_UNLOCK(info, flags);
2957 } /* cy_put_char */
2960 * This routine is called by the kernel after it has written a
2961 * series of characters to the tty device using put_char().
2963 static void cy_flush_chars(struct tty_struct *tty)
2965 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2967 #ifdef CY_DEBUG_IO
2968 printk("cyc:cy_flush_chars ttyC%d\n", info->line); /* */
2969 #endif
2971 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2972 return;
2974 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2975 !info->xmit_buf)
2976 return;
2978 start_xmit(info);
2979 } /* cy_flush_chars */
2982 * This routine returns the numbers of characters the tty driver
2983 * will accept for queuing to be written. This number is subject
2984 * to change as output buffers get emptied, or if the output flow
2985 * control is activated.
2987 static int cy_write_room(struct tty_struct *tty)
2989 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2990 int ret;
2992 #ifdef CY_DEBUG_IO
2993 printk("cyc:cy_write_room ttyC%d\n", info->line); /* */
2994 #endif
2996 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2997 return 0;
2998 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2999 if (ret < 0)
3000 ret = 0;
3001 return ret;
3002 } /* cy_write_room */
3004 static int cy_chars_in_buffer(struct tty_struct *tty)
3006 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3007 int card, channel;
3009 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
3010 return 0;
3012 card = info->card;
3013 channel = (info->line) - (cy_card[card].first_line);
3015 #ifdef Z_EXT_CHARS_IN_BUFFER
3016 if (!IS_CYC_Z(cy_card[card])) {
3017 #endif /* Z_EXT_CHARS_IN_BUFFER */
3018 #ifdef CY_DEBUG_IO
3019 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt); /* */
3020 #endif
3021 return info->xmit_cnt;
3022 #ifdef Z_EXT_CHARS_IN_BUFFER
3023 } else {
3024 static volatile struct FIRM_ID *firm_id;
3025 static volatile struct ZFW_CTRL *zfw_ctrl;
3026 static volatile struct CH_CTRL *ch_ctrl;
3027 static volatile struct BUF_CTRL *buf_ctrl;
3028 int char_count;
3029 volatile uclong tx_put, tx_get, tx_bufsize;
3031 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3032 zfw_ctrl = cy_card[card].base_addr +
3033 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3034 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3035 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3037 tx_get = cy_readl(&buf_ctrl->tx_get);
3038 tx_put = cy_readl(&buf_ctrl->tx_put);
3039 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
3040 if (tx_put >= tx_get)
3041 char_count = tx_put - tx_get;
3042 else
3043 char_count = tx_put - tx_get + tx_bufsize;
3044 #ifdef CY_DEBUG_IO
3045 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt + char_count); /* */
3046 #endif
3047 return info->xmit_cnt + char_count;
3049 #endif /* Z_EXT_CHARS_IN_BUFFER */
3050 } /* cy_chars_in_buffer */
3053 * ------------------------------------------------------------
3054 * cy_ioctl() and friends
3055 * ------------------------------------------------------------
3058 static void cyy_baud_calc(struct cyclades_port *info, uclong baud)
3060 int co, co_val, bpr;
3061 uclong cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3062 25000000);
3064 if (baud == 0) {
3065 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3066 return;
3069 /* determine which prescaler to use */
3070 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3071 if (cy_clock / co_val / baud > 63)
3072 break;
3075 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3076 if (bpr > 255)
3077 bpr = 255;
3079 info->tbpr = info->rbpr = bpr;
3080 info->tco = info->rco = co;
3084 * This routine finds or computes the various line characteristics.
3085 * It used to be called config_setup
3087 static void set_line_char(struct cyclades_port *info)
3089 unsigned long flags;
3090 void __iomem *base_addr;
3091 int card, chip, channel, index;
3092 unsigned cflag, iflag;
3093 unsigned short chip_number;
3094 int baud, baud_rate = 0;
3095 int i;
3097 if (!info->tty || !info->tty->termios) {
3098 return;
3100 if (info->line == -1) {
3101 return;
3103 cflag = info->tty->termios->c_cflag;
3104 iflag = info->tty->termios->c_iflag;
3107 * Set up the tty->alt_speed kludge
3109 if (info->tty) {
3110 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3111 info->tty->alt_speed = 57600;
3112 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3113 info->tty->alt_speed = 115200;
3114 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3115 info->tty->alt_speed = 230400;
3116 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3117 info->tty->alt_speed = 460800;
3120 card = info->card;
3121 channel = (info->line) - (cy_card[card].first_line);
3122 chip_number = channel / 4;
3124 if (!IS_CYC_Z(cy_card[card])) {
3126 index = cy_card[card].bus_index;
3128 /* baud rate */
3129 baud = tty_get_baud_rate(info->tty);
3130 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3131 ASYNC_SPD_CUST) {
3132 if (info->custom_divisor)
3133 baud_rate = info->baud / info->custom_divisor;
3134 else
3135 baud_rate = info->baud;
3136 } else if (baud > CD1400_MAX_SPEED) {
3137 baud = CD1400_MAX_SPEED;
3139 /* find the baud index */
3140 for (i = 0; i < 20; i++) {
3141 if (baud == baud_table[i]) {
3142 break;
3145 if (i == 20) {
3146 i = 19; /* CD1400_MAX_SPEED */
3149 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3150 ASYNC_SPD_CUST) {
3151 cyy_baud_calc(info, baud_rate);
3152 } else {
3153 if (info->chip_rev >= CD1400_REV_J) {
3154 /* It is a CD1400 rev. J or later */
3155 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3156 info->tco = baud_co_60[i]; /* Tx CO */
3157 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3158 info->rco = baud_co_60[i]; /* Rx CO */
3159 } else {
3160 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3161 info->tco = baud_co_25[i]; /* Tx CO */
3162 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3163 info->rco = baud_co_25[i]; /* Rx CO */
3166 if (baud_table[i] == 134) {
3167 /* get it right for 134.5 baud */
3168 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3170 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3171 ASYNC_SPD_CUST) {
3172 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3173 baud_rate) + 2;
3174 } else if (baud_table[i]) {
3175 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3176 baud_table[i]) + 2;
3177 /* this needs to be propagated into the card info */
3178 } else {
3179 info->timeout = 0;
3181 /* By tradition (is it a standard?) a baud rate of zero
3182 implies the line should be/has been closed. A bit
3183 later in this routine such a test is performed. */
3185 /* byte size and parity */
3186 info->cor5 = 0;
3187 info->cor4 = 0;
3188 /* receive threshold */
3189 info->cor3 = (info->default_threshold ?
3190 info->default_threshold : baud_cor3[i]);
3191 info->cor2 = CyETC;
3192 switch (cflag & CSIZE) {
3193 case CS5:
3194 info->cor1 = Cy_5_BITS;
3195 break;
3196 case CS6:
3197 info->cor1 = Cy_6_BITS;
3198 break;
3199 case CS7:
3200 info->cor1 = Cy_7_BITS;
3201 break;
3202 case CS8:
3203 info->cor1 = Cy_8_BITS;
3204 break;
3206 if (cflag & CSTOPB) {
3207 info->cor1 |= Cy_2_STOP;
3209 if (cflag & PARENB) {
3210 if (cflag & PARODD) {
3211 info->cor1 |= CyPARITY_O;
3212 } else {
3213 info->cor1 |= CyPARITY_E;
3215 } else {
3216 info->cor1 |= CyPARITY_NONE;
3219 /* CTS flow control flag */
3220 if (cflag & CRTSCTS) {
3221 info->flags |= ASYNC_CTS_FLOW;
3222 info->cor2 |= CyCtsAE;
3223 } else {
3224 info->flags &= ~ASYNC_CTS_FLOW;
3225 info->cor2 &= ~CyCtsAE;
3227 if (cflag & CLOCAL)
3228 info->flags &= ~ASYNC_CHECK_CD;
3229 else
3230 info->flags |= ASYNC_CHECK_CD;
3232 /***********************************************
3233 The hardware option, CyRtsAO, presents RTS when
3234 the chip has characters to send. Since most modems
3235 use RTS as reverse (inbound) flow control, this
3236 option is not used. If inbound flow control is
3237 necessary, DTR can be programmed to provide the
3238 appropriate signals for use with a non-standard
3239 cable. Contact Marcio Saito for details.
3240 ***********************************************/
3242 chip = channel >> 2;
3243 channel &= 0x03;
3244 base_addr = cy_card[card].base_addr +
3245 (cy_chip_offset[chip] << index);
3247 CY_LOCK(info, flags);
3248 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3250 /* tx and rx baud rate */
3252 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3253 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3254 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3255 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3257 /* set line characteristics according configuration */
3259 cy_writeb(base_addr + (CySCHR1 << index),
3260 START_CHAR(info->tty));
3261 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3262 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3263 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3264 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3265 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3266 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3268 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3269 CyCOR3ch, index);
3271 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3272 cy_writeb(base_addr + (CyRTPR << index),
3273 (info->default_timeout ? info->default_timeout : 0x02));
3274 /* 10ms rx timeout */
3276 if (C_CLOCAL(info->tty)) {
3277 /* without modem intr */
3278 cy_writeb(base_addr + (CySRER << index),
3279 cy_readb(base_addr +
3280 (CySRER << index)) | CyMdmCh);
3281 /* act on 1->0 modem transitions */
3282 if ((cflag & CRTSCTS) && info->rflow) {
3283 cy_writeb(base_addr + (CyMCOR1 << index),
3284 (CyCTS | rflow_thr[i]));
3285 } else {
3286 cy_writeb(base_addr + (CyMCOR1 << index),
3287 CyCTS);
3289 /* act on 0->1 modem transitions */
3290 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3291 } else {
3292 /* without modem intr */
3293 cy_writeb(base_addr + (CySRER << index),
3294 cy_readb(base_addr +
3295 (CySRER << index)) | CyMdmCh);
3296 /* act on 1->0 modem transitions */
3297 if ((cflag & CRTSCTS) && info->rflow) {
3298 cy_writeb(base_addr + (CyMCOR1 << index),
3299 (CyDSR | CyCTS | CyRI | CyDCD |
3300 rflow_thr[i]));
3301 } else {
3302 cy_writeb(base_addr + (CyMCOR1 << index),
3303 CyDSR | CyCTS | CyRI | CyDCD);
3305 /* act on 0->1 modem transitions */
3306 cy_writeb(base_addr + (CyMCOR2 << index),
3307 CyDSR | CyCTS | CyRI | CyDCD);
3310 if (i == 0) { /* baud rate is zero, turn off line */
3311 if (info->rtsdtr_inv) {
3312 cy_writeb(base_addr + (CyMSVR1 << index),
3313 ~CyRTS);
3314 } else {
3315 cy_writeb(base_addr + (CyMSVR2 << index),
3316 ~CyDTR);
3318 #ifdef CY_DEBUG_DTR
3319 printk("cyc:set_line_char dropping DTR\n");
3320 printk(" status: 0x%x, 0x%x\n",
3321 cy_readb(base_addr + (CyMSVR1 << index)),
3322 cy_readb(base_addr + (CyMSVR2 << index)));
3323 #endif
3324 } else {
3325 if (info->rtsdtr_inv) {
3326 cy_writeb(base_addr + (CyMSVR1 << index),
3327 CyRTS);
3328 } else {
3329 cy_writeb(base_addr + (CyMSVR2 << index),
3330 CyDTR);
3332 #ifdef CY_DEBUG_DTR
3333 printk("cyc:set_line_char raising DTR\n");
3334 printk(" status: 0x%x, 0x%x\n",
3335 cy_readb(base_addr + (CyMSVR1 << index)),
3336 cy_readb(base_addr + (CyMSVR2 << index)));
3337 #endif
3340 if (info->tty) {
3341 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3343 CY_UNLOCK(info, flags);
3345 } else {
3346 struct FIRM_ID __iomem *firm_id;
3347 struct ZFW_CTRL __iomem *zfw_ctrl;
3348 struct BOARD_CTRL __iomem *board_ctrl;
3349 struct CH_CTRL __iomem *ch_ctrl;
3350 struct BUF_CTRL __iomem *buf_ctrl;
3351 uclong sw_flow;
3352 int retval;
3354 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3355 if (!ISZLOADED(cy_card[card])) {
3356 return;
3359 zfw_ctrl = cy_card[card].base_addr +
3360 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3361 board_ctrl = &zfw_ctrl->board_ctrl;
3362 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3363 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3365 /* baud rate */
3366 baud = tty_get_baud_rate(info->tty);
3367 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3368 ASYNC_SPD_CUST) {
3369 if (info->custom_divisor)
3370 baud_rate = info->baud / info->custom_divisor;
3371 else
3372 baud_rate = info->baud;
3373 } else if (baud > CYZ_MAX_SPEED) {
3374 baud = CYZ_MAX_SPEED;
3376 cy_writel(&ch_ctrl->comm_baud, baud);
3378 if (baud == 134) {
3379 /* get it right for 134.5 baud */
3380 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3382 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3383 ASYNC_SPD_CUST) {
3384 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3385 baud_rate) + 2;
3386 } else if (baud) {
3387 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3388 baud) + 2;
3389 /* this needs to be propagated into the card info */
3390 } else {
3391 info->timeout = 0;
3394 /* byte size and parity */
3395 switch (cflag & CSIZE) {
3396 case CS5:
3397 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3398 break;
3399 case CS6:
3400 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3401 break;
3402 case CS7:
3403 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3404 break;
3405 case CS8:
3406 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3407 break;
3409 if (cflag & CSTOPB) {
3410 cy_writel(&ch_ctrl->comm_data_l,
3411 cy_readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3412 } else {
3413 cy_writel(&ch_ctrl->comm_data_l,
3414 cy_readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3416 if (cflag & PARENB) {
3417 if (cflag & PARODD) {
3418 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3419 } else {
3420 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3422 } else {
3423 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3426 /* CTS flow control flag */
3427 if (cflag & CRTSCTS) {
3428 cy_writel(&ch_ctrl->hw_flow,
3429 cy_readl(&ch_ctrl->
3430 hw_flow) | C_RS_CTS | C_RS_RTS);
3431 } else {
3432 cy_writel(&ch_ctrl->hw_flow,
3433 cy_readl(&ch_ctrl->
3434 hw_flow) & ~(C_RS_CTS | C_RS_RTS));
3436 /* As the HW flow control is done in firmware, the driver
3437 doesn't need to care about it */
3438 info->flags &= ~ASYNC_CTS_FLOW;
3440 /* XON/XOFF/XANY flow control flags */
3441 sw_flow = 0;
3442 if (iflag & IXON) {
3443 sw_flow |= C_FL_OXX;
3444 if (iflag & IXANY)
3445 sw_flow |= C_FL_OIXANY;
3447 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3449 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
3450 if (retval != 0) {
3451 printk("cyc:set_line_char retval on ttyC%d was %x\n",
3452 info->line, retval);
3455 /* CD sensitivity */
3456 if (cflag & CLOCAL) {
3457 info->flags &= ~ASYNC_CHECK_CD;
3458 } else {
3459 info->flags |= ASYNC_CHECK_CD;
3462 if (baud == 0) { /* baud rate is zero, turn off line */
3463 cy_writel(&ch_ctrl->rs_control,
3464 cy_readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3465 #ifdef CY_DEBUG_DTR
3466 printk("cyc:set_line_char dropping Z DTR\n");
3467 #endif
3468 } else {
3469 cy_writel(&ch_ctrl->rs_control,
3470 cy_readl(&ch_ctrl->rs_control) | C_RS_DTR);
3471 #ifdef CY_DEBUG_DTR
3472 printk("cyc:set_line_char raising Z DTR\n");
3473 #endif
3476 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTLM,0L);
3477 if (retval != 0) {
3478 printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
3479 info->line, retval);
3482 if (info->tty) {
3483 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3486 } /* set_line_char */
3488 static int
3489 get_serial_info(struct cyclades_port *info,
3490 struct serial_struct __user * retinfo)
3492 struct serial_struct tmp;
3493 struct cyclades_card *cinfo = &cy_card[info->card];
3495 if (!retinfo)
3496 return -EFAULT;
3497 memset(&tmp, 0, sizeof(tmp));
3498 tmp.type = info->type;
3499 tmp.line = info->line;
3500 tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
3501 tmp.irq = cinfo->irq;
3502 tmp.flags = info->flags;
3503 tmp.close_delay = info->close_delay;
3504 tmp.baud_base = info->baud;
3505 tmp.custom_divisor = info->custom_divisor;
3506 tmp.hub6 = 0; /*!!! */
3507 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3508 } /* get_serial_info */
3510 static int
3511 set_serial_info(struct cyclades_port *info,
3512 struct serial_struct __user * new_info)
3514 struct serial_struct new_serial;
3515 struct cyclades_port old_info;
3517 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3518 return -EFAULT;
3519 old_info = *info;
3521 if (!capable(CAP_SYS_ADMIN)) {
3522 if (new_serial.close_delay != info->close_delay ||
3523 new_serial.baud_base != info->baud ||
3524 (new_serial.flags & ASYNC_FLAGS &
3525 ~ASYNC_USR_MASK) !=
3526 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3527 return -EPERM;
3528 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3529 (new_serial.flags & ASYNC_USR_MASK);
3530 info->baud = new_serial.baud_base;
3531 info->custom_divisor = new_serial.custom_divisor;
3532 goto check_and_exit;
3536 * OK, past this point, all the error checking has been done.
3537 * At this point, we start making changes.....
3540 info->baud = new_serial.baud_base;
3541 info->custom_divisor = new_serial.custom_divisor;
3542 info->flags = (info->flags & ~ASYNC_FLAGS) |
3543 (new_serial.flags & ASYNC_FLAGS);
3544 info->close_delay = new_serial.close_delay * HZ / 100;
3545 info->closing_wait = new_serial.closing_wait * HZ / 100;
3547 check_and_exit:
3548 if (info->flags & ASYNC_INITIALIZED) {
3549 set_line_char(info);
3550 return 0;
3551 } else {
3552 return startup(info);
3554 } /* set_serial_info */
3557 * get_lsr_info - get line status register info
3559 * Purpose: Let user call ioctl() to get info when the UART physically
3560 * is emptied. On bus types like RS485, the transmitter must
3561 * release the bus after transmitting. This must be done when
3562 * the transmit shift register is empty, not be done when the
3563 * transmit holding register is empty. This functionality
3564 * allows an RS485 driver to be written in user space.
3566 static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3568 int card, chip, channel, index;
3569 unsigned char status;
3570 unsigned int result;
3571 unsigned long flags;
3572 void __iomem *base_addr;
3574 card = info->card;
3575 channel = (info->line) - (cy_card[card].first_line);
3576 if (!IS_CYC_Z(cy_card[card])) {
3577 chip = channel >> 2;
3578 channel &= 0x03;
3579 index = cy_card[card].bus_index;
3580 base_addr =
3581 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3583 CY_LOCK(info, flags);
3584 status = cy_readb(base_addr + (CySRER << index)) &
3585 (CyTxRdy | CyTxMpty);
3586 CY_UNLOCK(info, flags);
3587 result = (status ? 0 : TIOCSER_TEMT);
3588 } else {
3589 /* Not supported yet */
3590 return -EINVAL;
3592 return put_user(result, (unsigned long __user *)value);
3595 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3597 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3598 int card, chip, channel, index;
3599 void __iomem *base_addr;
3600 unsigned long flags;
3601 unsigned char status;
3602 unsigned long lstatus;
3603 unsigned int result;
3604 struct FIRM_ID __iomem *firm_id;
3605 struct ZFW_CTRL __iomem *zfw_ctrl;
3606 struct BOARD_CTRL __iomem *board_ctrl;
3607 struct CH_CTRL __iomem *ch_ctrl;
3609 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3610 return -ENODEV;
3612 card = info->card;
3613 channel = (info->line) - (cy_card[card].first_line);
3614 if (!IS_CYC_Z(cy_card[card])) {
3615 chip = channel >> 2;
3616 channel &= 0x03;
3617 index = cy_card[card].bus_index;
3618 base_addr =
3619 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3621 CY_LOCK(info, flags);
3622 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3623 status = cy_readb(base_addr + (CyMSVR1 << index));
3624 status |= cy_readb(base_addr + (CyMSVR2 << index));
3625 CY_UNLOCK(info, flags);
3627 if (info->rtsdtr_inv) {
3628 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3629 ((status & CyDTR) ? TIOCM_RTS : 0);
3630 } else {
3631 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3632 ((status & CyDTR) ? TIOCM_DTR : 0);
3634 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3635 ((status & CyRI) ? TIOCM_RNG : 0) |
3636 ((status & CyDSR) ? TIOCM_DSR : 0) |
3637 ((status & CyCTS) ? TIOCM_CTS : 0);
3638 } else {
3639 base_addr = cy_card[card].base_addr;
3641 if (cy_card[card].num_chips != -1) {
3642 return -EINVAL;
3645 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3646 if (ISZLOADED(cy_card[card])) {
3647 zfw_ctrl = cy_card[card].base_addr +
3648 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3649 board_ctrl = &zfw_ctrl->board_ctrl;
3650 ch_ctrl = zfw_ctrl->ch_ctrl;
3651 lstatus = cy_readl(&ch_ctrl[channel].rs_status);
3652 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3653 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3654 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3655 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3656 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3657 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3658 } else {
3659 result = 0;
3660 return -ENODEV;
3664 return result;
3665 } /* cy_tiomget */
3667 static int
3668 cy_tiocmset(struct tty_struct *tty, struct file *file,
3669 unsigned int set, unsigned int clear)
3671 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3672 int card, chip, channel, index;
3673 void __iomem *base_addr;
3674 unsigned long flags;
3675 struct FIRM_ID __iomem *firm_id;
3676 struct ZFW_CTRL __iomem *zfw_ctrl;
3677 struct BOARD_CTRL __iomem *board_ctrl;
3678 struct CH_CTRL __iomem *ch_ctrl;
3679 int retval;
3681 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3682 return -ENODEV;
3684 card = info->card;
3685 channel = (info->line) - (cy_card[card].first_line);
3686 if (!IS_CYC_Z(cy_card[card])) {
3687 chip = channel >> 2;
3688 channel &= 0x03;
3689 index = cy_card[card].bus_index;
3690 base_addr =
3691 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3693 if (set & TIOCM_RTS) {
3694 CY_LOCK(info, flags);
3695 cy_writeb(base_addr + (CyCAR << index),
3696 (u_char) channel);
3697 if (info->rtsdtr_inv) {
3698 cy_writeb(base_addr + (CyMSVR2 << index),
3699 CyDTR);
3700 } else {
3701 cy_writeb(base_addr + (CyMSVR1 << index),
3702 CyRTS);
3704 CY_UNLOCK(info, flags);
3706 if (clear & TIOCM_RTS) {
3707 CY_LOCK(info, flags);
3708 cy_writeb(base_addr + (CyCAR << index),
3709 (u_char) channel);
3710 if (info->rtsdtr_inv) {
3711 cy_writeb(base_addr + (CyMSVR2 << index),
3712 ~CyDTR);
3713 } else {
3714 cy_writeb(base_addr + (CyMSVR1 << index),
3715 ~CyRTS);
3717 CY_UNLOCK(info, flags);
3719 if (set & TIOCM_DTR) {
3720 CY_LOCK(info, flags);
3721 cy_writeb(base_addr + (CyCAR << index),
3722 (u_char) channel);
3723 if (info->rtsdtr_inv) {
3724 cy_writeb(base_addr + (CyMSVR1 << index),
3725 CyRTS);
3726 } else {
3727 cy_writeb(base_addr + (CyMSVR2 << index),
3728 CyDTR);
3730 #ifdef CY_DEBUG_DTR
3731 printk("cyc:set_modem_info raising DTR\n");
3732 printk(" status: 0x%x, 0x%x\n",
3733 cy_readb(base_addr + (CyMSVR1 << index)),
3734 cy_readb(base_addr + (CyMSVR2 << index)));
3735 #endif
3736 CY_UNLOCK(info, flags);
3738 if (clear & TIOCM_DTR) {
3739 CY_LOCK(info, flags);
3740 cy_writeb(base_addr + (CyCAR << index),
3741 (u_char) channel);
3742 if (info->rtsdtr_inv) {
3743 cy_writeb(base_addr + (CyMSVR1 << index),
3744 ~CyRTS);
3745 } else {
3746 cy_writeb(base_addr + (CyMSVR2 << index),
3747 ~CyDTR);
3750 #ifdef CY_DEBUG_DTR
3751 printk("cyc:set_modem_info dropping DTR\n");
3752 printk(" status: 0x%x, 0x%x\n",
3753 cy_readb(base_addr + (CyMSVR1 << index)),
3754 cy_readb(base_addr + (CyMSVR2 << index)));
3755 #endif
3756 CY_UNLOCK(info, flags);
3758 } else {
3759 base_addr = cy_card[card].base_addr;
3761 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3762 if (ISZLOADED(cy_card[card])) {
3763 zfw_ctrl = cy_card[card].base_addr +
3764 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3765 board_ctrl = &zfw_ctrl->board_ctrl;
3766 ch_ctrl = zfw_ctrl->ch_ctrl;
3768 if (set & TIOCM_RTS) {
3769 CY_LOCK(info, flags);
3770 cy_writel(&ch_ctrl[channel].rs_control,
3771 cy_readl(&ch_ctrl[channel].
3772 rs_control) | C_RS_RTS);
3773 CY_UNLOCK(info, flags);
3775 if (clear & TIOCM_RTS) {
3776 CY_LOCK(info, flags);
3777 cy_writel(&ch_ctrl[channel].rs_control,
3778 cy_readl(&ch_ctrl[channel].
3779 rs_control) & ~C_RS_RTS);
3780 CY_UNLOCK(info, flags);
3782 if (set & TIOCM_DTR) {
3783 CY_LOCK(info, flags);
3784 cy_writel(&ch_ctrl[channel].rs_control,
3785 cy_readl(&ch_ctrl[channel].
3786 rs_control) | C_RS_DTR);
3787 #ifdef CY_DEBUG_DTR
3788 printk("cyc:set_modem_info raising Z DTR\n");
3789 #endif
3790 CY_UNLOCK(info, flags);
3792 if (clear & TIOCM_DTR) {
3793 CY_LOCK(info, flags);
3794 cy_writel(&ch_ctrl[channel].rs_control,
3795 cy_readl(&ch_ctrl[channel].
3796 rs_control) & ~C_RS_DTR);
3797 #ifdef CY_DEBUG_DTR
3798 printk("cyc:set_modem_info clearing Z DTR\n");
3799 #endif
3800 CY_UNLOCK(info, flags);
3802 } else {
3803 return -ENODEV;
3805 CY_LOCK(info, flags);
3806 retval = cyz_issue_cmd(&cy_card[info->card],
3807 channel, C_CM_IOCTLM, 0L);
3808 if (retval != 0) {
3809 printk("cyc:set_modem_info retval on ttyC%d was %x\n",
3810 info->line, retval);
3812 CY_UNLOCK(info, flags);
3814 return 0;
3815 } /* cy_tiocmset */
3818 * cy_break() --- routine which turns the break handling on or off
3820 static void cy_break(struct tty_struct *tty, int break_state)
3822 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3823 unsigned long flags;
3825 if (serial_paranoia_check(info, tty->name, "cy_break"))
3826 return;
3828 CY_LOCK(info, flags);
3829 if (!IS_CYC_Z(cy_card[info->card])) {
3830 /* Let the transmit ISR take care of this (since it
3831 requires stuffing characters into the output stream).
3833 if (break_state == -1) {
3834 if (!info->breakon) {
3835 info->breakon = 1;
3836 if (!info->xmit_cnt) {
3837 CY_UNLOCK(info, flags);
3838 start_xmit(info);
3839 CY_LOCK(info, flags);
3842 } else {
3843 if (!info->breakoff) {
3844 info->breakoff = 1;
3845 if (!info->xmit_cnt) {
3846 CY_UNLOCK(info, flags);
3847 start_xmit(info);
3848 CY_LOCK(info, flags);
3852 } else {
3853 int retval;
3855 if (break_state == -1) {
3856 retval = cyz_issue_cmd(&cy_card[info->card],
3857 info->line - cy_card[info->card].first_line,
3858 C_CM_SET_BREAK, 0L);
3859 if (retval != 0) {
3860 printk("cyc:cy_break (set) retval on ttyC%d "
3861 "was %x\n", info->line, retval);
3863 } else {
3864 retval = cyz_issue_cmd(&cy_card[info->card],
3865 info->line - cy_card[info->card].first_line,
3866 C_CM_CLR_BREAK, 0L);
3867 if (retval != 0) {
3868 printk("cyc:cy_break (clr) retval on ttyC%d "
3869 "was %x\n", info->line, retval);
3873 CY_UNLOCK(info, flags);
3874 } /* cy_break */
3876 static int
3877 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3880 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3881 return -EFAULT;
3882 info->mon.int_count = 0;
3883 info->mon.char_count = 0;
3884 info->mon.char_max = 0;
3885 info->mon.char_last = 0;
3886 return 0;
3887 } /* get_mon_info */
3889 static int set_threshold(struct cyclades_port *info, unsigned long value)
3891 void __iomem *base_addr;
3892 int card, channel, chip, index;
3893 unsigned long flags;
3895 card = info->card;
3896 channel = info->line - cy_card[card].first_line;
3897 if (!IS_CYC_Z(cy_card[card])) {
3898 chip = channel >> 2;
3899 channel &= 0x03;
3900 index = cy_card[card].bus_index;
3901 base_addr =
3902 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3904 info->cor3 &= ~CyREC_FIFO;
3905 info->cor3 |= value & CyREC_FIFO;
3907 CY_LOCK(info, flags);
3908 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3909 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3910 CY_UNLOCK(info, flags);
3911 } else {
3912 /* Nothing to do! */
3914 return 0;
3915 } /* set_threshold */
3917 static int
3918 get_threshold(struct cyclades_port *info, unsigned long __user * value)
3920 void __iomem *base_addr;
3921 int card, channel, chip, index;
3922 unsigned long tmp;
3924 card = info->card;
3925 channel = info->line - cy_card[card].first_line;
3926 if (!IS_CYC_Z(cy_card[card])) {
3927 chip = channel >> 2;
3928 channel &= 0x03;
3929 index = cy_card[card].bus_index;
3930 base_addr =
3931 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3933 tmp = cy_readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3934 return put_user(tmp, value);
3935 } else {
3936 /* Nothing to do! */
3937 return 0;
3939 } /* get_threshold */
3941 static int
3942 set_default_threshold(struct cyclades_port *info, unsigned long value)
3944 info->default_threshold = value & 0x0f;
3945 return 0;
3946 } /* set_default_threshold */
3948 static int
3949 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3951 return put_user(info->default_threshold, value);
3952 } /* get_default_threshold */
3954 static int set_timeout(struct cyclades_port *info, unsigned long value)
3956 void __iomem *base_addr;
3957 int card, channel, chip, index;
3958 unsigned long flags;
3960 card = info->card;
3961 channel = info->line - cy_card[card].first_line;
3962 if (!IS_CYC_Z(cy_card[card])) {
3963 chip = channel >> 2;
3964 channel &= 0x03;
3965 index = cy_card[card].bus_index;
3966 base_addr =
3967 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3969 CY_LOCK(info, flags);
3970 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3971 CY_UNLOCK(info, flags);
3972 } else {
3973 /* Nothing to do! */
3975 return 0;
3976 } /* set_timeout */
3978 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3980 void __iomem *base_addr;
3981 int card, channel, chip, index;
3982 unsigned long tmp;
3984 card = info->card;
3985 channel = info->line - cy_card[card].first_line;
3986 if (!IS_CYC_Z(cy_card[card])) {
3987 chip = channel >> 2;
3988 channel &= 0x03;
3989 index = cy_card[card].bus_index;
3990 base_addr =
3991 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3993 tmp = cy_readb(base_addr + (CyRTPR << index));
3994 return put_user(tmp, value);
3995 } else {
3996 /* Nothing to do! */
3997 return 0;
3999 } /* get_timeout */
4001 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
4003 info->default_timeout = value & 0xff;
4004 return 0;
4005 } /* set_default_timeout */
4007 static int
4008 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
4010 return put_user(info->default_timeout, value);
4011 } /* get_default_timeout */
4014 * This routine allows the tty driver to implement device-
4015 * specific ioctl's. If the ioctl number passed in cmd is
4016 * not recognized by the driver, it should return ENOIOCTLCMD.
4018 static int
4019 cy_ioctl(struct tty_struct *tty, struct file *file,
4020 unsigned int cmd, unsigned long arg)
4022 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4023 struct cyclades_icount cprev, cnow; /* kernel counter temps */
4024 struct serial_icounter_struct __user *p_cuser; /* user space */
4025 int ret_val = 0;
4026 unsigned long flags;
4027 void __user *argp = (void __user *)arg;
4029 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
4030 return -ENODEV;
4032 #ifdef CY_DEBUG_OTHER
4033 printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", info->line, cmd, arg); /* */
4034 #endif
4036 switch (cmd) {
4037 case CYGETMON:
4038 ret_val = get_mon_info(info, argp);
4039 break;
4040 case CYGETTHRESH:
4041 ret_val = get_threshold(info, argp);
4042 break;
4043 case CYSETTHRESH:
4044 ret_val = set_threshold(info, arg);
4045 break;
4046 case CYGETDEFTHRESH:
4047 ret_val = get_default_threshold(info, argp);
4048 break;
4049 case CYSETDEFTHRESH:
4050 ret_val = set_default_threshold(info, arg);
4051 break;
4052 case CYGETTIMEOUT:
4053 ret_val = get_timeout(info, argp);
4054 break;
4055 case CYSETTIMEOUT:
4056 ret_val = set_timeout(info, arg);
4057 break;
4058 case CYGETDEFTIMEOUT:
4059 ret_val = get_default_timeout(info, argp);
4060 break;
4061 case CYSETDEFTIMEOUT:
4062 ret_val = set_default_timeout(info, arg);
4063 break;
4064 case CYSETRFLOW:
4065 info->rflow = (int)arg;
4066 ret_val = 0;
4067 break;
4068 case CYGETRFLOW:
4069 ret_val = info->rflow;
4070 break;
4071 case CYSETRTSDTR_INV:
4072 info->rtsdtr_inv = (int)arg;
4073 ret_val = 0;
4074 break;
4075 case CYGETRTSDTR_INV:
4076 ret_val = info->rtsdtr_inv;
4077 break;
4078 case CYGETCARDINFO:
4079 if (copy_to_user(argp, &cy_card[info->card],
4080 sizeof(struct cyclades_card))) {
4081 ret_val = -EFAULT;
4082 break;
4084 ret_val = 0;
4085 break;
4086 case CYGETCD1400VER:
4087 ret_val = info->chip_rev;
4088 break;
4089 #ifndef CONFIG_CYZ_INTR
4090 case CYZSETPOLLCYCLE:
4091 cyz_polling_cycle = (arg * HZ) / 1000;
4092 ret_val = 0;
4093 break;
4094 case CYZGETPOLLCYCLE:
4095 ret_val = (cyz_polling_cycle * 1000) / HZ;
4096 break;
4097 #endif /* CONFIG_CYZ_INTR */
4098 case CYSETWAIT:
4099 info->closing_wait = (unsigned short)arg *HZ / 100;
4100 ret_val = 0;
4101 break;
4102 case CYGETWAIT:
4103 ret_val = info->closing_wait / (HZ / 100);
4104 break;
4105 case TIOCGSERIAL:
4106 ret_val = get_serial_info(info, argp);
4107 break;
4108 case TIOCSSERIAL:
4109 ret_val = set_serial_info(info, argp);
4110 break;
4111 case TIOCSERGETLSR: /* Get line status register */
4112 ret_val = get_lsr_info(info, argp);
4113 break;
4115 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4116 * - mask passed in arg for lines of interest
4117 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4118 * Caller should use TIOCGICOUNT to see which one it was
4120 case TIOCMIWAIT:
4121 CY_LOCK(info, flags);
4122 /* note the counters on entry */
4123 cprev = info->icount;
4124 CY_UNLOCK(info, flags);
4125 while (1) {
4126 interruptible_sleep_on(&info->delta_msr_wait);
4127 /* see if a signal did it */
4128 if (signal_pending(current)) {
4129 return -ERESTARTSYS;
4132 CY_LOCK(info, flags);
4133 cnow = info->icount; /* atomic copy */
4134 CY_UNLOCK(info, flags);
4136 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
4137 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
4138 return -EIO; /* no change => error */
4140 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4141 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4142 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4143 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
4144 return 0;
4146 cprev = cnow;
4148 /* NOTREACHED */
4151 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4152 * Return: write counters to the user passed counter struct
4153 * NB: both 1->0 and 0->1 transitions are counted except for
4154 * RI where only 0->1 is counted.
4156 case TIOCGICOUNT:
4157 CY_LOCK(info, flags);
4158 cnow = info->icount;
4159 CY_UNLOCK(info, flags);
4160 p_cuser = argp;
4161 ret_val = put_user(cnow.cts, &p_cuser->cts);
4162 if (ret_val)
4163 return ret_val;
4164 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4165 if (ret_val)
4166 return ret_val;
4167 ret_val = put_user(cnow.rng, &p_cuser->rng);
4168 if (ret_val)
4169 return ret_val;
4170 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4171 if (ret_val)
4172 return ret_val;
4173 ret_val = put_user(cnow.rx, &p_cuser->rx);
4174 if (ret_val)
4175 return ret_val;
4176 ret_val = put_user(cnow.tx, &p_cuser->tx);
4177 if (ret_val)
4178 return ret_val;
4179 ret_val = put_user(cnow.frame, &p_cuser->frame);
4180 if (ret_val)
4181 return ret_val;
4182 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4183 if (ret_val)
4184 return ret_val;
4185 ret_val = put_user(cnow.parity, &p_cuser->parity);
4186 if (ret_val)
4187 return ret_val;
4188 ret_val = put_user(cnow.brk, &p_cuser->brk);
4189 if (ret_val)
4190 return ret_val;
4191 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4192 if (ret_val)
4193 return ret_val;
4194 ret_val = 0;
4195 break;
4196 default:
4197 ret_val = -ENOIOCTLCMD;
4200 #ifdef CY_DEBUG_OTHER
4201 printk(" cyc:cy_ioctl done\n");
4202 #endif
4204 return ret_val;
4205 } /* cy_ioctl */
4208 * This routine allows the tty driver to be notified when
4209 * device's termios settings have changed. Note that a
4210 * well-designed tty driver should be prepared to accept the case
4211 * where old == NULL, and try to do something rational.
4213 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4215 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4217 #ifdef CY_DEBUG_OTHER
4218 printk("cyc:cy_set_termios ttyC%d\n", info->line);
4219 #endif
4221 if (tty->termios->c_cflag == old_termios->c_cflag &&
4222 (tty->termios->c_iflag & (IXON | IXANY)) ==
4223 (old_termios->c_iflag & (IXON | IXANY)))
4224 return;
4225 set_line_char(info);
4227 if ((old_termios->c_cflag & CRTSCTS) &&
4228 !(tty->termios->c_cflag & CRTSCTS)) {
4229 tty->hw_stopped = 0;
4230 cy_start(tty);
4232 #if 0
4234 * No need to wake up processes in open wait, since they
4235 * sample the CLOCAL flag once, and don't recheck it.
4236 * XXX It's not clear whether the current behavior is correct
4237 * or not. Hence, this may change.....
4239 if (!(old_termios->c_cflag & CLOCAL) &&
4240 (tty->termios->c_cflag & CLOCAL))
4241 wake_up_interruptible(&info->open_wait);
4242 #endif
4243 } /* cy_set_termios */
4245 /* This function is used to send a high-priority XON/XOFF character to
4246 the device.
4248 static void cy_send_xchar(struct tty_struct *tty, char ch)
4250 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4251 int card, channel;
4253 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4254 return;
4256 info->x_char = ch;
4258 if (ch)
4259 cy_start(tty);
4261 card = info->card;
4262 channel = info->line - cy_card[card].first_line;
4264 if (IS_CYC_Z(cy_card[card])) {
4265 if (ch == STOP_CHAR(tty))
4266 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXOFF,
4267 0L);
4268 else if (ch == START_CHAR(tty))
4269 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXON,
4270 0L);
4274 /* This routine is called by the upper-layer tty layer to signal
4275 that incoming characters should be throttled because the input
4276 buffers are close to full.
4278 static void cy_throttle(struct tty_struct *tty)
4280 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4281 unsigned long flags;
4282 void __iomem *base_addr;
4283 int card, chip, channel, index;
4285 #ifdef CY_DEBUG_THROTTLE
4286 char buf[64];
4288 printk("cyc:throttle %s: %d....ttyC%d\n", tty_name(tty, buf),
4289 tty->ldisc.chars_in_buffer(tty), info->line);
4290 #endif
4292 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4293 return;
4296 card = info->card;
4298 if (I_IXOFF(tty)) {
4299 if (!IS_CYC_Z(cy_card[card]))
4300 cy_send_xchar(tty, STOP_CHAR(tty));
4301 else
4302 info->throttle = 1;
4305 if (tty->termios->c_cflag & CRTSCTS) {
4306 channel = info->line - cy_card[card].first_line;
4307 if (!IS_CYC_Z(cy_card[card])) {
4308 chip = channel >> 2;
4309 channel &= 0x03;
4310 index = cy_card[card].bus_index;
4311 base_addr = cy_card[card].base_addr +
4312 (cy_chip_offset[chip] << index);
4314 CY_LOCK(info, flags);
4315 cy_writeb(base_addr + (CyCAR << index),
4316 (u_char) channel);
4317 if (info->rtsdtr_inv) {
4318 cy_writeb(base_addr + (CyMSVR2 << index),
4319 ~CyDTR);
4320 } else {
4321 cy_writeb(base_addr + (CyMSVR1 << index),
4322 ~CyRTS);
4324 CY_UNLOCK(info, flags);
4325 } else {
4326 info->throttle = 1;
4329 } /* cy_throttle */
4332 * This routine notifies the tty driver that it should signal
4333 * that characters can now be sent to the tty without fear of
4334 * overrunning the input buffers of the line disciplines.
4336 static void cy_unthrottle(struct tty_struct *tty)
4338 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4339 unsigned long flags;
4340 void __iomem *base_addr;
4341 int card, chip, channel, index;
4343 #ifdef CY_DEBUG_THROTTLE
4344 char buf[64];
4346 printk("cyc:unthrottle %s: %d....ttyC%d\n", tty_name(tty, buf),
4347 tty->ldisc.chars_in_buffer(tty), info->line);
4348 #endif
4350 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4351 return;
4354 if (I_IXOFF(tty)) {
4355 if (info->x_char)
4356 info->x_char = 0;
4357 else
4358 cy_send_xchar(tty, START_CHAR(tty));
4361 if (tty->termios->c_cflag & CRTSCTS) {
4362 card = info->card;
4363 channel = info->line - cy_card[card].first_line;
4364 if (!IS_CYC_Z(cy_card[card])) {
4365 chip = channel >> 2;
4366 channel &= 0x03;
4367 index = cy_card[card].bus_index;
4368 base_addr = cy_card[card].base_addr +
4369 (cy_chip_offset[chip] << index);
4371 CY_LOCK(info, flags);
4372 cy_writeb(base_addr + (CyCAR << index),
4373 (u_char) channel);
4374 if (info->rtsdtr_inv) {
4375 cy_writeb(base_addr + (CyMSVR2 << index),
4376 CyDTR);
4377 } else {
4378 cy_writeb(base_addr + (CyMSVR1 << index),
4379 CyRTS);
4381 CY_UNLOCK(info, flags);
4382 } else {
4383 info->throttle = 0;
4386 } /* cy_unthrottle */
4388 /* cy_start and cy_stop provide software output flow control as a
4389 function of XON/XOFF, software CTS, and other such stuff.
4391 static void cy_stop(struct tty_struct *tty)
4393 struct cyclades_card *cinfo;
4394 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4395 void __iomem *base_addr;
4396 int chip, channel, index;
4397 unsigned long flags;
4399 #ifdef CY_DEBUG_OTHER
4400 printk("cyc:cy_stop ttyC%d\n", info->line); /* */
4401 #endif
4403 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4404 return;
4406 cinfo = &cy_card[info->card];
4407 channel = info->line - cinfo->first_line;
4408 if (!IS_CYC_Z(*cinfo)) {
4409 index = cinfo->bus_index;
4410 chip = channel >> 2;
4411 channel &= 0x03;
4412 base_addr = cy_card[info->card].base_addr +
4413 (cy_chip_offset[chip] << index);
4415 CY_LOCK(info, flags);
4416 cy_writeb(base_addr + (CyCAR << index),
4417 (u_char)(channel & 0x0003)); /* index channel */
4418 cy_writeb(base_addr + (CySRER << index),
4419 cy_readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4420 CY_UNLOCK(info, flags);
4421 } else {
4422 /* Nothing to do! */
4424 } /* cy_stop */
4426 static void cy_start(struct tty_struct *tty)
4428 struct cyclades_card *cinfo;
4429 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4430 void __iomem *base_addr;
4431 int chip, channel, index;
4432 unsigned long flags;
4434 #ifdef CY_DEBUG_OTHER
4435 printk("cyc:cy_start ttyC%d\n", info->line); /* */
4436 #endif
4438 if (serial_paranoia_check(info, tty->name, "cy_start"))
4439 return;
4441 cinfo = &cy_card[info->card];
4442 channel = info->line - cinfo->first_line;
4443 index = cinfo->bus_index;
4444 if (!IS_CYC_Z(*cinfo)) {
4445 chip = channel >> 2;
4446 channel &= 0x03;
4447 base_addr = cy_card[info->card].base_addr +
4448 (cy_chip_offset[chip] << index);
4450 CY_LOCK(info, flags);
4451 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4452 cy_writeb(base_addr + (CySRER << index),
4453 cy_readb(base_addr + (CySRER << index)) | CyTxRdy);
4454 CY_UNLOCK(info, flags);
4455 } else {
4456 /* Nothing to do! */
4458 } /* cy_start */
4460 static void cy_flush_buffer(struct tty_struct *tty)
4462 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4463 int card, channel, retval;
4464 unsigned long flags;
4466 #ifdef CY_DEBUG_IO
4467 printk("cyc:cy_flush_buffer ttyC%d\n", info->line); /* */
4468 #endif
4470 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4471 return;
4473 card = info->card;
4474 channel = (info->line) - (cy_card[card].first_line);
4476 CY_LOCK(info, flags);
4477 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4478 CY_UNLOCK(info, flags);
4480 if (IS_CYC_Z(cy_card[card])) { /* If it is a Z card, flush the on-board
4481 buffers as well */
4482 CY_LOCK(info, flags);
4483 retval =
4484 cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
4485 if (retval != 0) {
4486 printk("cyc: flush_buffer retval on ttyC%d was %x\n",
4487 info->line, retval);
4489 CY_UNLOCK(info, flags);
4491 tty_wakeup(tty);
4492 wake_up_interruptible(&tty->write_wait);
4493 } /* cy_flush_buffer */
4496 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4498 static void cy_hangup(struct tty_struct *tty)
4500 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4502 #ifdef CY_DEBUG_OTHER
4503 printk("cyc:cy_hangup ttyC%d\n", info->line); /* */
4504 #endif
4506 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4507 return;
4509 cy_flush_buffer(tty);
4510 shutdown(info);
4511 info->event = 0;
4512 info->count = 0;
4513 #ifdef CY_DEBUG_COUNT
4514 printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
4515 #endif
4516 info->tty = NULL;
4517 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4518 wake_up_interruptible(&info->open_wait);
4519 } /* cy_hangup */
4522 * ---------------------------------------------------------------------
4523 * cy_init() and friends
4525 * cy_init() is called at boot-time to initialize the serial driver.
4526 * ---------------------------------------------------------------------
4529 /* initialize chips on Cyclom-Y card -- return number of valid
4530 chips (which is number of ports/4) */
4531 static unsigned short __init
4532 cyy_init_card(void __iomem * true_base_addr, int index)
4534 unsigned int chip_number;
4535 void __iomem *base_addr;
4537 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4538 /* Cy_HwReset is 0x1400 */
4539 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4540 /* Cy_ClrIntr is 0x1800 */
4541 udelay(500L);
4543 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4544 base_addr =
4545 true_base_addr + (cy_chip_offset[chip_number] << index);
4546 mdelay(1);
4547 if (cy_readb(base_addr + (CyCCR << index)) != 0x00) {
4548 /*************
4549 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4550 chip_number, (unsigned long)base_addr);
4551 *************/
4552 return chip_number;
4555 cy_writeb(base_addr + (CyGFRCR << index), 0);
4556 udelay(10L);
4558 /* The Cyclom-16Y does not decode address bit 9 and therefore
4559 cannot distinguish between references to chip 0 and a non-
4560 existent chip 4. If the preceding clearing of the supposed
4561 chip 4 GFRCR register appears at chip 0, there is no chip 4
4562 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4564 if (chip_number == 4 && cy_readb(true_base_addr +
4565 (cy_chip_offset[0] << index) +
4566 (CyGFRCR << index)) == 0) {
4567 return chip_number;
4570 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4571 mdelay(1);
4573 if (cy_readb(base_addr + (CyGFRCR << index)) == 0x00) {
4575 printk(" chip #%d at %#6lx is not responding ",
4576 chip_number, (unsigned long)base_addr);
4577 printk("(GFRCR stayed 0)\n",
4579 return chip_number;
4581 if ((0xf0 & (cy_readb(base_addr + (CyGFRCR << index)))) !=
4582 0x40) {
4584 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4585 "%#2x)\n",
4586 chip_number, (unsigned long)base_addr,
4587 base_addr[CyGFRCR<<index]);
4589 return chip_number;
4591 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4592 if (cy_readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4593 /* It is a CD1400 rev. J or later */
4594 /* Impossible to reach 5ms with this chip.
4595 Changed to 2ms instead (f = 500 Hz). */
4596 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4597 } else {
4598 /* f = 200 Hz */
4599 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4603 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4604 chip_number, (unsigned long)base_addr,
4605 cy_readb(base_addr+(CyGFRCR<<index)));
4608 return chip_number;
4609 } /* cyy_init_card */
4612 * ---------------------------------------------------------------------
4613 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4614 * sets global variables and return the number of ISA boards found.
4615 * ---------------------------------------------------------------------
4617 static int __init cy_detect_isa(void)
4619 #ifdef CONFIG_ISA
4620 unsigned short cy_isa_irq, nboard;
4621 void __iomem *cy_isa_address;
4622 unsigned short i, j, cy_isa_nchan;
4623 #ifdef MODULE
4624 int isparam = 0;
4625 #endif
4627 nboard = 0;
4629 #ifdef MODULE
4630 /* Check for module parameters */
4631 for (i = 0; i < NR_CARDS; i++) {
4632 if (maddr[i] || i) {
4633 isparam = 1;
4634 cy_isa_addresses[i] = maddr[i];
4636 if (!maddr[i])
4637 break;
4639 #endif
4641 /* scan the address table probing for Cyclom-Y/ISA boards */
4642 for (i = 0; i < NR_ISA_ADDRS; i++) {
4643 unsigned int isa_address = cy_isa_addresses[i];
4644 if (isa_address == 0x0000) {
4645 return nboard;
4648 /* probe for CD1400... */
4649 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4650 cy_isa_nchan = CyPORTS_PER_CHIP *
4651 cyy_init_card(cy_isa_address, 0);
4652 if (cy_isa_nchan == 0) {
4653 continue;
4655 #ifdef MODULE
4656 if (isparam && irq[i])
4657 cy_isa_irq = irq[i];
4658 else
4659 #endif
4660 /* find out the board's irq by probing */
4661 cy_isa_irq = detect_isa_irq(cy_isa_address);
4662 if (cy_isa_irq == 0) {
4663 printk("Cyclom-Y/ISA found at 0x%lx ",
4664 (unsigned long)cy_isa_address);
4665 printk("but the IRQ could not be detected.\n");
4666 continue;
4669 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4670 printk("Cyclom-Y/ISA found at 0x%lx ",
4671 (unsigned long)cy_isa_address);
4672 printk("but no more channels are available.\n");
4673 printk("Change NR_PORTS in cyclades.c and recompile "
4674 "kernel.\n");
4675 return nboard;
4677 /* fill the next cy_card structure available */
4678 for (j = 0; j < NR_CARDS; j++) {
4679 if (cy_card[j].base_addr == 0)
4680 break;
4682 if (j == NR_CARDS) { /* no more cy_cards available */
4683 printk("Cyclom-Y/ISA found at 0x%lx ",
4684 (unsigned long)cy_isa_address);
4685 printk("but no more cards can be used .\n");
4686 printk("Change NR_CARDS in cyclades.c and recompile "
4687 "kernel.\n");
4688 return nboard;
4691 /* allocate IRQ */
4692 if (request_irq(cy_isa_irq, cyy_interrupt,
4693 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4694 printk("Cyclom-Y/ISA found at 0x%lx ",
4695 (unsigned long)cy_isa_address);
4696 printk("but could not allocate IRQ#%d.\n", cy_isa_irq);
4697 return nboard;
4700 /* set cy_card */
4701 cy_card[j].base_addr = cy_isa_address;
4702 cy_card[j].ctl_addr = NULL;
4703 cy_card[j].irq = (int)cy_isa_irq;
4704 cy_card[j].bus_index = 0;
4705 cy_card[j].first_line = cy_next_channel;
4706 cy_card[j].num_chips = cy_isa_nchan / 4;
4707 nboard++;
4709 /* print message */
4710 printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
4711 j + 1, (unsigned long)cy_isa_address,
4712 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4713 cy_isa_irq);
4714 printk("%d channels starting from port %d.\n",
4715 cy_isa_nchan, cy_next_channel);
4716 cy_next_channel += cy_isa_nchan;
4718 return nboard;
4719 #else
4720 return 0;
4721 #endif /* CONFIG_ISA */
4722 } /* cy_detect_isa */
4724 static void plx_init(void __iomem * addr, uclong initctl)
4726 /* Reset PLX */
4727 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x40000000);
4728 udelay(100L);
4729 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x40000000);
4731 /* Reload Config. Registers from EEPROM */
4732 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x20000000);
4733 udelay(100L);
4734 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x20000000);
4738 * ---------------------------------------------------------------------
4739 * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
4740 * sets global variables and return the number of PCI boards found.
4741 * ---------------------------------------------------------------------
4743 static int __init cy_detect_pci(void)
4745 #ifdef CONFIG_PCI
4747 struct pci_dev *pdev = NULL;
4748 unsigned char cyy_rev_id;
4749 unsigned char cy_pci_irq = 0;
4750 uclong cy_pci_phys0, cy_pci_phys2;
4751 void __iomem *cy_pci_addr0, *cy_pci_addr2;
4752 unsigned short i, j, cy_pci_nchan, plx_ver;
4753 unsigned short device_id, dev_index = 0;
4754 uclong mailbox;
4755 uclong ZeIndex = 0;
4756 void __iomem *Ze_addr0[NR_CARDS], *Ze_addr2[NR_CARDS];
4757 uclong Ze_phys0[NR_CARDS], Ze_phys2[NR_CARDS];
4758 unsigned char Ze_irq[NR_CARDS];
4759 struct pci_dev *Ze_pdev[NR_CARDS];
4761 for (i = 0; i < NR_CARDS; i++) {
4762 /* look for a Cyclades card by vendor and device id */
4763 while ((device_id = cy_pci_dev_id[dev_index]) != 0) {
4764 if ((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
4765 device_id, pdev)) == NULL) {
4766 dev_index++; /* try next device id */
4767 } else {
4768 break; /* found a board */
4772 if (device_id == 0)
4773 break;
4775 if (pci_enable_device(pdev))
4776 continue;
4778 /* read PCI configuration area */
4779 cy_pci_irq = pdev->irq;
4780 cy_pci_phys0 = pci_resource_start(pdev, 0);
4781 cy_pci_phys2 = pci_resource_start(pdev, 2);
4782 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4784 device_id &= ~PCI_DEVICE_ID_MASK;
4786 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4787 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4788 #ifdef CY_PCI_DEBUG
4789 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4790 pdev->bus->number, pdev->devfn);
4791 printk("rev_id=%d) IRQ%d\n",
4792 cyy_rev_id, (int)cy_pci_irq);
4793 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
4794 "ctladdr=0x%lx\n",
4795 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4796 #endif
4798 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4799 printk(" Warning: PCI I/O bit incorrectly "
4800 "set. Ignoring it...\n");
4801 pdev->resource[2].flags &= ~IORESOURCE_IO;
4804 /* Although we don't use this I/O region, we should
4805 request it from the kernel anyway, to avoid problems
4806 with other drivers accessing it. */
4807 if (pci_request_regions(pdev, "Cyclom-Y") != 0) {
4808 printk(KERN_ERR "cyclades: failed to reserve "
4809 "PCI resources\n");
4810 continue;
4812 #if defined(__alpha__)
4813 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4814 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4815 pdev->bus->number, pdev->devfn);
4816 printk("rev_id=%d) IRQ%d\n",
4817 cyy_rev_id, (int)cy_pci_irq);
4818 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
4819 "ctladdr=0x%lx\n",
4820 (ulong)cy_pci_phys2,
4821 (ulong)cy_pci_phys0);
4822 printk("Cyclom-Y/PCI not supported for low "
4823 "addresses in Alpha systems.\n");
4824 i--;
4825 continue;
4827 #endif
4828 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Yctl);
4829 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ywin);
4831 #ifdef CY_PCI_DEBUG
4832 printk("Cyclom-Y/PCI: relocate winaddr=0x%lx "
4833 "ctladdr=0x%lx\n",
4834 (u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
4835 #endif
4836 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4837 cyy_init_card(cy_pci_addr2, 1));
4838 if (cy_pci_nchan == 0) {
4839 printk("Cyclom-Y PCI host card with ");
4840 printk("no Serial-Modules at 0x%lx.\n",
4841 (ulong) cy_pci_phys2);
4842 i--;
4843 continue;
4845 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4846 printk("Cyclom-Y/PCI found at 0x%lx ",
4847 (ulong) cy_pci_phys2);
4848 printk("but no channels are available.\n");
4849 printk("Change NR_PORTS in cyclades.c and "
4850 "recompile kernel.\n");
4851 return i;
4853 /* fill the next cy_card structure available */
4854 for (j = 0; j < NR_CARDS; j++) {
4855 if (cy_card[j].base_addr == 0)
4856 break;
4858 if (j == NR_CARDS) { /* no more cy_cards available */
4859 printk("Cyclom-Y/PCI found at 0x%lx ",
4860 (ulong) cy_pci_phys2);
4861 printk("but no more cards can be used.\n");
4862 printk("Change NR_CARDS in cyclades.c and "
4863 "recompile kernel.\n");
4864 return i;
4867 /* allocate IRQ */
4868 if (request_irq(cy_pci_irq, cyy_interrupt,
4869 IRQF_SHARED, "Cyclom-Y", &cy_card[j])) {
4870 printk("Cyclom-Y/PCI found at 0x%lx ",
4871 (ulong) cy_pci_phys2);
4872 printk("but could not allocate IRQ%d.\n",
4873 cy_pci_irq);
4874 return i;
4877 /* set cy_card */
4878 cy_card[j].base_phys = (ulong) cy_pci_phys2;
4879 cy_card[j].ctl_phys = (ulong) cy_pci_phys0;
4880 cy_card[j].base_addr = cy_pci_addr2;
4881 cy_card[j].ctl_addr = cy_pci_addr0;
4882 cy_card[j].irq = (int)cy_pci_irq;
4883 cy_card[j].bus_index = 1;
4884 cy_card[j].first_line = cy_next_channel;
4885 cy_card[j].num_chips = cy_pci_nchan / 4;
4886 cy_card[j].pdev = pdev;
4888 /* enable interrupts in the PCI interface */
4889 plx_ver = cy_readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
4890 switch (plx_ver) {
4891 case PLX_9050:
4893 cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
4894 break;
4896 case PLX_9060:
4897 case PLX_9080:
4898 default: /* Old boards, use PLX_9060 */
4900 plx_init(cy_pci_addr0, 0x6c);
4901 /* For some yet unknown reason, once the PLX9060 reloads
4902 the EEPROM, the IRQ is lost and, thus, we have to
4903 re-write it to the PCI config. registers.
4904 This will remain here until we find a permanent
4905 fix. */
4906 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4907 cy_pci_irq);
4909 cy_writew(cy_pci_addr0 + 0x68,
4910 cy_readw(cy_pci_addr0 +
4911 0x68) | 0x0900);
4912 break;
4915 /* print message */
4916 printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4917 j + 1, (ulong)cy_pci_phys2,
4918 (ulong) (cy_pci_phys2 + CyPCI_Ywin - 1),
4919 (int)cy_pci_irq);
4920 printk("%d channels starting from port %d.\n",
4921 cy_pci_nchan, cy_next_channel);
4923 cy_next_channel += cy_pci_nchan;
4924 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4925 /* print message */
4926 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4927 pdev->bus->number, pdev->devfn);
4928 printk("rev_id=%d) IRQ%d\n",
4929 cyy_rev_id, (int)cy_pci_irq);
4930 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
4931 "ctladdr=0x%lx\n",
4932 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4933 printk("Cyclades-Z/PCI not supported for low "
4934 "addresses\n");
4935 break;
4936 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
4937 #ifdef CY_PCI_DEBUG
4938 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4939 pdev->bus->number, pdev->devfn);
4940 printk("rev_id=%d) IRQ%d\n",
4941 cyy_rev_id, (int)cy_pci_irq);
4942 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
4943 "ctladdr=0x%lx\n",
4944 (ulong) cy_pci_phys2, (ulong) cy_pci_phys0);
4945 #endif
4946 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Zctl);
4948 /* Disable interrupts on the PLX before resetting it */
4949 cy_writew(cy_pci_addr0 + 0x68,
4950 cy_readw(cy_pci_addr0 + 0x68) & ~0x0900);
4952 plx_init(cy_pci_addr0, 0x6c);
4953 /* For some yet unknown reason, once the PLX9060 reloads
4954 the EEPROM, the IRQ is lost and, thus, we have to
4955 re-write it to the PCI config. registers.
4956 This will remain here until we find a permanent
4957 fix. */
4958 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4959 cy_pci_irq);
4961 mailbox =
4962 (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
4963 cy_pci_addr0)->mail_box_0);
4965 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4966 printk(" Warning: PCI I/O bit incorrectly "
4967 "set. Ignoring it...\n");
4968 pdev->resource[2].flags &= ~IORESOURCE_IO;
4971 /* Although we don't use this I/O region, we should
4972 request it from the kernel anyway, to avoid problems
4973 with other drivers accessing it. */
4974 if (pci_request_regions(pdev, "Cyclades-Z") != 0) {
4975 printk(KERN_ERR "cyclades: failed to reserve "
4976 "PCI resources\n");
4977 continue;
4980 if (mailbox == ZE_V1) {
4981 cy_pci_addr2 = ioremap(cy_pci_phys2,
4982 CyPCI_Ze_win);
4983 if (ZeIndex == NR_CARDS) {
4984 printk("Cyclades-Ze/PCI found at "
4985 "0x%lx but no more cards can "
4986 "be used.\nChange NR_CARDS in "
4987 "cyclades.c and recompile "
4988 "kernel.\n",
4989 (ulong)cy_pci_phys2);
4990 } else {
4991 Ze_phys0[ZeIndex] = cy_pci_phys0;
4992 Ze_phys2[ZeIndex] = cy_pci_phys2;
4993 Ze_addr0[ZeIndex] = cy_pci_addr0;
4994 Ze_addr2[ZeIndex] = cy_pci_addr2;
4995 Ze_irq[ZeIndex] = cy_pci_irq;
4996 Ze_pdev[ZeIndex] = pdev;
4997 ZeIndex++;
4999 i--;
5000 continue;
5001 } else {
5002 cy_pci_addr2 = ioremap(cy_pci_phys2,CyPCI_Zwin);
5005 #ifdef CY_PCI_DEBUG
5006 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx "
5007 "ctladdr=0x%lx\n",
5008 (ulong) cy_pci_addr2, (ulong) cy_pci_addr0);
5009 if (mailbox == ZO_V1) {
5010 cy_writel(&((struct RUNTIME_9060 *)
5011 (cy_pci_addr0))->loc_addr_base,
5012 WIN_CREG);
5013 PAUSE;
5014 printk("Cyclades-8Zo/PCI: FPGA id %lx, ver "
5015 "%lx\n", (ulong) (0xff &
5016 cy_readl(&((struct CUSTOM_REG *)
5017 (cy_pci_addr2))->fpga_id)),
5018 (ulong)(0xff &
5019 cy_readl(&((struct CUSTOM_REG *)
5020 (cy_pci_addr2))->
5021 fpga_version)));
5022 cy_writel(&((struct RUNTIME_9060 *)
5023 (cy_pci_addr0))->loc_addr_base,
5024 WIN_RAM);
5025 } else {
5026 printk("Cyclades-Z/PCI: New Cyclades-Z board. "
5027 "FPGA not loaded\n");
5029 #endif
5030 /* The following clears the firmware id word. This
5031 ensures that the driver will not attempt to talk to
5032 the board until it has been properly initialized.
5034 PAUSE;
5035 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5036 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
5038 /* This must be a Cyclades-8Zo/PCI. The extendable
5039 version will have a different device_id and will
5040 be allocated its maximum number of ports. */
5041 cy_pci_nchan = 8;
5043 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5044 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5045 "no channels are available.\nChange "
5046 "NR_PORTS in cyclades.c and recompile "
5047 "kernel.\n", (ulong)cy_pci_phys2);
5048 return i;
5051 /* fill the next cy_card structure available */
5052 for (j = 0; j < NR_CARDS; j++) {
5053 if (cy_card[j].base_addr == 0)
5054 break;
5056 if (j == NR_CARDS) { /* no more cy_cards available */
5057 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5058 "no more cards can be used.\nChange "
5059 "NR_CARDS in cyclades.c and recompile "
5060 "kernel.\n", (ulong)cy_pci_phys2);
5061 return i;
5063 #ifdef CONFIG_CYZ_INTR
5064 /* allocate IRQ only if board has an IRQ */
5065 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5066 if (request_irq(cy_pci_irq, cyz_interrupt,
5067 IRQF_SHARED, "Cyclades-Z",
5068 &cy_card[j])) {
5069 printk("Cyclom-8Zo/PCI found at 0x%lx "
5070 "but could not allocate "
5071 "IRQ%d.\n", (ulong)cy_pci_phys2,
5072 cy_pci_irq);
5073 return i;
5076 #endif /* CONFIG_CYZ_INTR */
5078 /* set cy_card */
5079 cy_card[j].base_phys = cy_pci_phys2;
5080 cy_card[j].ctl_phys = cy_pci_phys0;
5081 cy_card[j].base_addr = cy_pci_addr2;
5082 cy_card[j].ctl_addr = cy_pci_addr0;
5083 cy_card[j].irq = (int)cy_pci_irq;
5084 cy_card[j].bus_index = 1;
5085 cy_card[j].first_line = cy_next_channel;
5086 cy_card[j].num_chips = -1;
5087 cy_card[j].pdev = pdev;
5089 /* print message */
5090 #ifdef CONFIG_CYZ_INTR
5091 /* don't report IRQ if board is no IRQ */
5092 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5093 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, "
5094 "IRQ%d, ", j + 1, (ulong)cy_pci_phys2,
5095 (ulong) (cy_pci_phys2 + CyPCI_Zwin - 1),
5096 (int)cy_pci_irq);
5097 else
5098 #endif /* CONFIG_CYZ_INTR */
5099 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
5100 j + 1, (ulong)cy_pci_phys2,
5101 (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));
5103 printk("%d channels starting from port %d.\n",
5104 cy_pci_nchan, cy_next_channel);
5105 cy_next_channel += cy_pci_nchan;
5109 for (; ZeIndex != 0 && i < NR_CARDS; i++) {
5110 cy_pci_phys0 = Ze_phys0[0];
5111 cy_pci_phys2 = Ze_phys2[0];
5112 cy_pci_addr0 = Ze_addr0[0];
5113 cy_pci_addr2 = Ze_addr2[0];
5114 cy_pci_irq = Ze_irq[0];
5115 pdev = Ze_pdev[0];
5116 for (j = 0; j < ZeIndex - 1; j++) {
5117 Ze_phys0[j] = Ze_phys0[j + 1];
5118 Ze_phys2[j] = Ze_phys2[j + 1];
5119 Ze_addr0[j] = Ze_addr0[j + 1];
5120 Ze_addr2[j] = Ze_addr2[j + 1];
5121 Ze_irq[j] = Ze_irq[j + 1];
5122 Ze_pdev[j] = Ze_pdev[j + 1];
5124 ZeIndex--;
5125 mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
5126 cy_pci_addr0)->mail_box_0);
5127 #ifdef CY_PCI_DEBUG
5128 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
5129 (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
5130 printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not "
5131 "loaded\n");
5132 #endif
5133 PAUSE;
5134 /* This must be the new Cyclades-Ze/PCI. */
5135 cy_pci_nchan = ZE_V1_NPORTS;
5137 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5138 printk("Cyclades-Ze/PCI found at 0x%lx but no channels "
5139 "are available.\nChange NR_PORTS in cyclades.c "
5140 "and recompile kernel.\n",
5141 (ulong) cy_pci_phys2);
5142 return i;
5145 /* fill the next cy_card structure available */
5146 for (j = 0; j < NR_CARDS; j++) {
5147 if (cy_card[j].base_addr == 0)
5148 break;
5150 if (j == NR_CARDS) { /* no more cy_cards available */
5151 printk("Cyclades-Ze/PCI found at 0x%lx but no more "
5152 "cards can be used.\nChange NR_CARDS in "
5153 "cyclades.c and recompile kernel.\n",
5154 (ulong) cy_pci_phys2);
5155 return i;
5157 #ifdef CONFIG_CYZ_INTR
5158 /* allocate IRQ only if board has an IRQ */
5159 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5160 if (request_irq(cy_pci_irq, cyz_interrupt,
5161 IRQF_SHARED, "Cyclades-Z",
5162 &cy_card[j])) {
5163 printk("Cyclom-Ze/PCI found at 0x%lx ",
5164 (ulong) cy_pci_phys2);
5165 printk("but could not allocate IRQ%d.\n",
5166 cy_pci_irq);
5167 return i;
5170 #endif /* CONFIG_CYZ_INTR */
5172 /* set cy_card */
5173 cy_card[j].base_phys = cy_pci_phys2;
5174 cy_card[j].ctl_phys = cy_pci_phys0;
5175 cy_card[j].base_addr = cy_pci_addr2;
5176 cy_card[j].ctl_addr = cy_pci_addr0;
5177 cy_card[j].irq = (int)cy_pci_irq;
5178 cy_card[j].bus_index = 1;
5179 cy_card[j].first_line = cy_next_channel;
5180 cy_card[j].num_chips = -1;
5181 cy_card[j].pdev = pdev;
5183 /* print message */
5184 #ifdef CONFIG_CYZ_INTR
5185 /* don't report IRQ if board is no IRQ */
5186 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5187 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
5188 j + 1, (ulong) cy_pci_phys2,
5189 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1),
5190 (int)cy_pci_irq);
5191 else
5192 #endif /* CONFIG_CYZ_INTR */
5193 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
5194 j + 1, (ulong) cy_pci_phys2,
5195 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1));
5197 printk("%d channels starting from port %d.\n",
5198 cy_pci_nchan, cy_next_channel);
5199 cy_next_channel += cy_pci_nchan;
5201 if (ZeIndex != 0) {
5202 printk("Cyclades-Ze/PCI found at 0x%x but no more cards can be "
5203 "used.\nChange NR_CARDS in cyclades.c and recompile "
5204 "kernel.\n", (unsigned int)Ze_phys2[0]);
5206 return i;
5207 #else
5208 return 0;
5209 #endif /* ifdef CONFIG_PCI */
5210 } /* cy_detect_pci */
5213 * This routine prints out the appropriate serial driver version number
5214 * and identifies which options were configured into this driver.
5216 static inline void show_version(void)
5218 printk("Cyclades driver " CY_VERSION "\n");
5219 printk(" built %s %s\n", __DATE__, __TIME__);
5220 } /* show_version */
5222 static int
5223 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5224 int *eof, void *data)
5226 struct cyclades_port *info;
5227 int i;
5228 int len = 0;
5229 off_t begin = 0;
5230 off_t pos = 0;
5231 int size;
5232 __u32 cur_jifs = jiffies;
5234 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5235 "IdleIn Overruns Ldisc\n");
5237 pos += size;
5238 len += size;
5240 /* Output one line for each known port */
5241 for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5242 info = &cy_port[i];
5244 if (info->count)
5245 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5246 "%8lu %9lu %6ld\n", info->line,
5247 (cur_jifs - info->idle_stats.in_use) / HZ,
5248 info->idle_stats.xmit_bytes,
5249 (cur_jifs - info->idle_stats.xmit_idle) / HZ,
5250 info->idle_stats.recv_bytes,
5251 (cur_jifs - info->idle_stats.recv_idle) / HZ,
5252 info->idle_stats.overruns,
5253 (long)info->tty->ldisc.num);
5254 else
5255 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5256 "%8lu %9lu %6ld\n",
5257 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5258 len += size;
5259 pos = begin + len;
5261 if (pos < offset) {
5262 len = 0;
5263 begin = pos;
5265 if (pos > offset + length)
5266 goto done;
5268 *eof = 1;
5269 done:
5270 *start = buf + (offset - begin); /* Start of wanted data */
5271 len -= (offset - begin); /* Start slop */
5272 if (len > length)
5273 len = length; /* Ending slop */
5274 if (len < 0)
5275 len = 0;
5276 return len;
5279 /* The serial driver boot-time initialization code!
5280 Hardware I/O ports are mapped to character special devices on a
5281 first found, first allocated manner. That is, this code searches
5282 for Cyclom cards in the system. As each is found, it is probed
5283 to discover how many chips (and thus how many ports) are present.
5284 These ports are mapped to the tty ports 32 and upward in monotonic
5285 fashion. If an 8-port card is replaced with a 16-port card, the
5286 port mapping on a following card will shift.
5288 This approach is different from what is used in the other serial
5289 device driver because the Cyclom is more properly a multiplexer,
5290 not just an aggregation of serial ports on one card.
5292 If there are more cards with more ports than have been
5293 statically allocated above, a warning is printed and the
5294 extra ports are ignored.
5297 static const struct tty_operations cy_ops = {
5298 .open = cy_open,
5299 .close = cy_close,
5300 .write = cy_write,
5301 .put_char = cy_put_char,
5302 .flush_chars = cy_flush_chars,
5303 .write_room = cy_write_room,
5304 .chars_in_buffer = cy_chars_in_buffer,
5305 .flush_buffer = cy_flush_buffer,
5306 .ioctl = cy_ioctl,
5307 .throttle = cy_throttle,
5308 .unthrottle = cy_unthrottle,
5309 .set_termios = cy_set_termios,
5310 .stop = cy_stop,
5311 .start = cy_start,
5312 .hangup = cy_hangup,
5313 .break_ctl = cy_break,
5314 .wait_until_sent = cy_wait_until_sent,
5315 .read_proc = cyclades_get_proc_info,
5316 .tiocmget = cy_tiocmget,
5317 .tiocmset = cy_tiocmset,
5320 static int __init cy_init(void)
5322 struct cyclades_port *info;
5323 struct cyclades_card *cinfo;
5324 int number_z_boards = 0;
5325 int board, port, i, index;
5326 unsigned long mailbox;
5327 unsigned short chip_number;
5328 int nports;
5330 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5331 if (!cy_serial_driver)
5332 return -ENOMEM;
5333 show_version();
5335 /* Initialize the tty_driver structure */
5337 cy_serial_driver->owner = THIS_MODULE;
5338 cy_serial_driver->driver_name = "cyclades";
5339 cy_serial_driver->name = "ttyC";
5340 cy_serial_driver->major = CYCLADES_MAJOR;
5341 cy_serial_driver->minor_start = 0;
5342 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5343 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5344 cy_serial_driver->init_termios = tty_std_termios;
5345 cy_serial_driver->init_termios.c_cflag =
5346 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5347 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
5348 tty_set_operations(cy_serial_driver, &cy_ops);
5350 if (tty_register_driver(cy_serial_driver))
5351 panic("Couldn't register Cyclades serial driver\n");
5353 for (i = 0; i < NR_CARDS; i++) {
5354 /* base_addr=0 indicates board not found */
5355 cy_card[i].base_addr = NULL;
5358 /* the code below is responsible to find the boards. Each different
5359 type of board has its own detection routine. If a board is found,
5360 the next cy_card structure available is set by the detection
5361 routine. These functions are responsible for checking the
5362 availability of cy_card and cy_port data structures and updating
5363 the cy_next_channel. */
5365 /* look for isa boards */
5366 cy_isa_nboard = cy_detect_isa();
5368 /* look for pci boards */
5369 cy_pci_nboard = cy_detect_pci();
5371 cy_nboard = cy_isa_nboard + cy_pci_nboard;
5373 /* invalidate remaining cy_card structures */
5374 for (i = 0; i < NR_CARDS; i++) {
5375 if (cy_card[i].base_addr == 0) {
5376 cy_card[i].first_line = -1;
5377 cy_card[i].ctl_addr = NULL;
5378 cy_card[i].irq = 0;
5379 cy_card[i].bus_index = 0;
5380 cy_card[i].first_line = 0;
5381 cy_card[i].num_chips = 0;
5384 /* invalidate remaining cy_port structures */
5385 for (i = cy_next_channel; i < NR_PORTS; i++) {
5386 cy_port[i].line = -1;
5387 cy_port[i].magic = -1;
5390 /* initialize per-port data structures for each valid board found */
5391 for (board = 0; board < cy_nboard; board++) {
5392 cinfo = &cy_card[board];
5393 if (cinfo->num_chips == -1) { /* Cyclades-Z */
5394 number_z_boards++;
5395 mailbox = cy_readl(&((struct RUNTIME_9060 __iomem *)
5396 cy_card[board].ctl_addr)->
5397 mail_box_0);
5398 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
5399 cinfo->intr_enabled = 0;
5400 cinfo->nports = 0; /* Will be correctly set later, after
5401 Z FW is loaded */
5402 spin_lock_init(&cinfo->card_lock);
5403 for (port = cinfo->first_line;
5404 port < cinfo->first_line + nports; port++) {
5405 info = &cy_port[port];
5406 info->magic = CYCLADES_MAGIC;
5407 info->type = PORT_STARTECH;
5408 info->card = board;
5409 info->line = port;
5410 info->chip_rev = 0;
5411 info->flags = STD_COM_FLAGS;
5412 info->tty = NULL;
5413 if (mailbox == ZO_V1)
5414 info->xmit_fifo_size = CYZ_FIFO_SIZE;
5415 else
5416 info->xmit_fifo_size =
5417 4 * CYZ_FIFO_SIZE;
5418 info->cor1 = 0;
5419 info->cor2 = 0;
5420 info->cor3 = 0;
5421 info->cor4 = 0;
5422 info->cor5 = 0;
5423 info->tbpr = 0;
5424 info->tco = 0;
5425 info->rbpr = 0;
5426 info->rco = 0;
5427 info->custom_divisor = 0;
5428 info->close_delay = 5 * HZ / 10;
5429 info->closing_wait = CLOSING_WAIT_DELAY;
5430 info->icount.cts = info->icount.dsr =
5431 info->icount.rng = info->icount.dcd = 0;
5432 info->icount.rx = info->icount.tx = 0;
5433 info->icount.frame = info->icount.parity = 0;
5434 info->icount.overrun = info->icount.brk = 0;
5435 info->x_char = 0;
5436 info->event = 0;
5437 info->count = 0;
5438 info->blocked_open = 0;
5439 info->default_threshold = 0;
5440 info->default_timeout = 0;
5441 INIT_WORK(&info->tqueue, do_softint);
5442 init_waitqueue_head(&info->open_wait);
5443 init_waitqueue_head(&info->close_wait);
5444 init_waitqueue_head(&info->shutdown_wait);
5445 init_waitqueue_head(&info->delta_msr_wait);
5446 /* info->session */
5447 /* info->pgrp */
5448 info->read_status_mask = 0;
5449 /* info->timeout */
5450 /* Bentson's vars */
5451 info->jiffies[0] = 0;
5452 info->jiffies[1] = 0;
5453 info->jiffies[2] = 0;
5454 info->rflush_count = 0;
5455 #ifdef CONFIG_CYZ_INTR
5456 init_timer(&cyz_rx_full_timer[port]);
5457 cyz_rx_full_timer[port].function = NULL;
5458 #endif
5460 continue;
5461 } else { /* Cyclom-Y of some kind */
5462 index = cinfo->bus_index;
5463 spin_lock_init(&cinfo->card_lock);
5464 cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
5465 for (port = cinfo->first_line;
5466 port < cinfo->first_line + cinfo->nports; port++) {
5467 info = &cy_port[port];
5468 info->magic = CYCLADES_MAGIC;
5469 info->type = PORT_CIRRUS;
5470 info->card = board;
5471 info->line = port;
5472 info->flags = STD_COM_FLAGS;
5473 info->tty = NULL;
5474 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
5475 info->cor1 =
5476 CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
5477 info->cor2 = CyETC;
5478 info->cor3 = 0x08; /* _very_ small rcv threshold */
5479 info->cor4 = 0;
5480 info->cor5 = 0;
5481 info->custom_divisor = 0;
5482 info->close_delay = 5 * HZ / 10;
5483 info->closing_wait = CLOSING_WAIT_DELAY;
5484 info->icount.cts = info->icount.dsr =
5485 info->icount.rng = info->icount.dcd = 0;
5486 info->icount.rx = info->icount.tx = 0;
5487 info->icount.frame = info->icount.parity = 0;
5488 info->icount.overrun = info->icount.brk = 0;
5489 chip_number = (port - cinfo->first_line) / 4;
5490 if ((info->chip_rev =
5491 cy_readb(cinfo->base_addr +
5492 (cy_chip_offset[chip_number] <<
5493 index) + (CyGFRCR << index))) >=
5494 CD1400_REV_J) {
5495 /* It is a CD1400 rev. J or later */
5496 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
5497 info->tco = baud_co_60[13]; /* Tx CO */
5498 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
5499 info->rco = baud_co_60[13]; /* Rx CO */
5500 info->rflow = 0;
5501 info->rtsdtr_inv = 1;
5502 } else {
5503 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
5504 info->tco = baud_co_25[13]; /* Tx CO */
5505 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
5506 info->rco = baud_co_25[13]; /* Rx CO */
5507 info->rflow = 0;
5508 info->rtsdtr_inv = 0;
5510 info->x_char = 0;
5511 info->event = 0;
5512 info->count = 0;
5513 info->blocked_open = 0;
5514 info->default_threshold = 0;
5515 info->default_timeout = 0;
5516 INIT_WORK(&info->tqueue, do_softint);
5517 init_waitqueue_head(&info->open_wait);
5518 init_waitqueue_head(&info->close_wait);
5519 init_waitqueue_head(&info->shutdown_wait);
5520 init_waitqueue_head(&info->delta_msr_wait);
5521 /* info->session */
5522 /* info->pgrp */
5523 info->read_status_mask =
5524 CyTIMEOUT | CySPECHAR | CyBREAK
5525 | CyPARITY | CyFRAME | CyOVERRUN;
5526 /* info->timeout */
5531 #ifndef CONFIG_CYZ_INTR
5532 if (number_z_boards && !cyz_timeron) {
5533 cyz_timeron++;
5534 cyz_timerlist.expires = jiffies + 1;
5535 add_timer(&cyz_timerlist);
5536 #ifdef CY_PCI_DEBUG
5537 printk("Cyclades-Z polling initialized\n");
5538 #endif
5540 #endif /* CONFIG_CYZ_INTR */
5542 return 0;
5544 } /* cy_init */
5546 static void __exit cy_cleanup_module(void)
5548 int i, e1;
5550 #ifndef CONFIG_CYZ_INTR
5551 if (cyz_timeron){
5552 cyz_timeron = 0;
5553 del_timer(&cyz_timerlist);
5555 #endif /* CONFIG_CYZ_INTR */
5557 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5558 printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
5559 e1);
5561 put_tty_driver(cy_serial_driver);
5563 for (i = 0; i < NR_CARDS; i++) {
5564 if (cy_card[i].base_addr) {
5565 iounmap(cy_card[i].base_addr);
5566 if (cy_card[i].ctl_addr)
5567 iounmap(cy_card[i].ctl_addr);
5568 if (cy_card[i].irq
5569 #ifndef CONFIG_CYZ_INTR
5570 && cy_card[i].num_chips != -1 /* not a Z card */
5571 #endif /* CONFIG_CYZ_INTR */
5573 free_irq(cy_card[i].irq, &cy_card[i]);
5574 #ifdef CONFIG_PCI
5575 if (cy_card[i].pdev)
5576 pci_release_regions(cy_card[i].pdev);
5577 #endif
5580 } /* cy_cleanup_module */
5582 module_init(cy_init);
5583 module_exit(cy_cleanup_module);
5585 MODULE_LICENSE("GPL");