aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorJesper Nilsson <jesper.nilsson@axis.com>2007-11-14 20:01:15 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-11-14 21:45:46 -0500
commit77accbf505a073beecf32e60265697517e203bea (patch)
tree5323f47dac9e40841502aa0191573b252747dc0b
parent4b7e888933b0d71f9534830ae1edc1e23f0fb075 (diff)
CRISv10 serial driver rewrite
New and improved serial driver for CRISv10, take three, with improvements suggested by Jiri Slaby. - Call wait_event_interruptible with a _correct_ and sensible condition. - Removed superfluous test of info->flags & ASYNC_CLOSING, since that is done by wait_event_interruptible. - Moved common code for deregistering DMA and IRQ to deinit_port function. - Use setup_timer when initializing flush_timer. - Convert bit-field for uses_dma_in and uses_dma_out to regular bytes. - Removed CVS tags. - Removed defines and comments for CRIS_BUF_SIZE and TTY_THRESHOLD_THROTTLE (no longer used). - Cleaned up code to pass checkpatch. - Add crisv10.h header file. - Merge of CRISv10 from Axis internal CVS. Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com> Reviewed-by: Jiri Slaby <jirislaby@gmail.com> Cc: Mikael Starvik <starvik@axis.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat
-rw-r--r--drivers/serial/crisv10.c1293
-rw-r--r--drivers/serial/crisv10.h146
2 files changed, 580 insertions, 859 deletions
diff --git a/drivers/serial/crisv10.c b/drivers/serial/crisv10.c
index f523cdf4b02b..a4e23cf47906 100644
--- a/drivers/serial/crisv10.c
+++ b/drivers/serial/crisv10.c
@@ -1,426 +1,10 @@
1/* $Id: serial.c,v 1.25 2004/09/29 10:33:49 starvik Exp $ 1/*
2 *
3 * Serial port driver for the ETRAX 100LX chip 2 * Serial port driver for the ETRAX 100LX chip
4 * 3 *
5 * Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Axis Communications AB 4 * Copyright (C) 1998-2007 Axis Communications AB
6 * 5 *
7 * Many, many authors. Based once upon a time on serial.c for 16x50. 6 * Many, many authors. Based once upon a time on serial.c for 16x50.
8 * 7 *
9 * $Log: serial.c,v $
10 * Revision 1.25 2004/09/29 10:33:49 starvik
11 * Resolved a dealock when printing debug from kernel.
12 *
13 * Revision 1.24 2004/08/27 23:25:59 johana
14 * rs_set_termios() must call change_speed() if c_iflag has changed or
15 * automatic XOFF handling will be enabled and transmitter will stop
16 * if 0x13 is received.
17 *
18 * Revision 1.23 2004/08/24 06:57:13 starvik
19 * More whitespace cleanup
20 *
21 * Revision 1.22 2004/08/24 06:12:20 starvik
22 * Whitespace cleanup
23 *
24 * Revision 1.20 2004/05/24 12:00:20 starvik
25 * Big merge of stuff from Linux 2.4 (e.g. manual mode for the serial port).
26 *
27 * Revision 1.19 2004/05/17 13:12:15 starvik
28 * Kernel console hook
29 * Big merge from Linux 2.4 still pending.
30 *
31 * Revision 1.18 2003/10/28 07:18:30 starvik
32 * Compiles with debug info
33 *
34 * Revision 1.17 2003/07/04 08:27:37 starvik
35 * Merge of Linux 2.5.74
36 *
37 * Revision 1.16 2003/06/13 10:05:19 johana
38 * Help the user to avoid trouble by:
39 * Forcing mixed mode for status/control lines if not all pins are used.
40 *
41 * Revision 1.15 2003/06/13 09:43:01 johana
42 * Merged in the following changes from os/linux/arch/cris/drivers/serial.c
43 * + some minor changes to reduce diff.
44 *
45 * Revision 1.49 2003/05/30 11:31:54 johana
46 * Merged in change-branch--serial9bit that adds CMSPAR support for sticky
47 * parity (mark/space)
48 *
49 * Revision 1.48 2003/05/30 11:03:57 johana
50 * Implemented rs_send_xchar() by disabling the DMA and writing manually.
51 * Added e100_disable_txdma_channel() and e100_enable_txdma_channel().
52 * Fixed rs_throttle() and rs_unthrottle() to properly call rs_send_xchar
53 * instead of setting info->x_char and check the CRTSCTS flag before
54 * controlling the rts pin.
55 *
56 * Revision 1.14 2003/04/09 08:12:44 pkj
57 * Corrected typo changes made upstream.
58 *
59 * Revision 1.13 2003/04/09 05:20:47 starvik
60 * Merge of Linux 2.5.67
61 *
62 * Revision 1.11 2003/01/22 06:48:37 starvik
63 * Fixed warnings issued by GCC 3.2.1
64 *
65 * Revision 1.9 2002/12/13 09:07:47 starvik
66 * Alert user that RX_TIMEOUT_TICKS==0 doesn't work
67 *
68 * Revision 1.8 2002/12/11 13:13:57 starvik
69 * Added arch/ to v10 specific includes
70 * Added fix from Linux 2.4 in serial.c (flush_to_flip_buffer)
71 *
72 * Revision 1.7 2002/12/06 07:13:57 starvik
73 * Corrected work queue stuff
74 * Removed CONFIG_ETRAX_SERIAL_FLUSH_DMA_FAST
75 *
76 * Revision 1.6 2002/11/21 07:17:46 starvik
77 * Change static inline to extern inline where otherwise outlined with gcc-3.2
78 *
79 * Revision 1.5 2002/11/14 15:59:49 starvik
80 * Linux 2.5 port of the latest serial driver from 2.4. The work queue stuff
81 * probably doesn't work yet.
82 *
83 * Revision 1.42 2002/11/05 09:08:47 johana
84 * Better implementation of rs_stop() and rs_start() that uses the XOFF
85 * register to start/stop transmission.
86 * change_speed() also initilises XOFF register correctly so that
87 * auto_xoff is enabled when IXON flag is set by user.
88 * This gives fast XOFF response times.
89 *
90 * Revision 1.41 2002/11/04 18:40:57 johana
91 * Implemented rs_stop() and rs_start().
92 * Simple tests using hwtestserial indicates that this should be enough
93 * to make it work.
94 *
95 * Revision 1.40 2002/10/14 05:33:18 starvik
96 * RS-485 uses fast timers even if SERIAL_FAST_TIMER is disabled
97 *
98 * Revision 1.39 2002/09/30 21:00:57 johana
99 * Support for CONFIG_ETRAX_SERx_DTR_RI_DSR_CD_MIXED where the status and
100 * control pins can be mixed between PA and PB.
101 * If no serial port uses MIXED old solution is used
102 * (saves a few bytes and cycles).
103 * control_pins struct uses masks instead of bit numbers.
104 * Corrected dummy values and polarity in line_info() so
105 * /proc/tty/driver/serial is now correct.
106 * (the E100_xxx_GET() macros is really active low - perhaps not obvious)
107 *
108 * Revision 1.38 2002/08/23 11:01:36 starvik
109 * Check that serial port is enabled in all interrupt handlers to avoid
110 * restarts of DMA channels not assigned to serial ports
111 *
112 * Revision 1.37 2002/08/13 13:02:37 bjornw
113 * Removed some warnings because of unused code
114 *
115 * Revision 1.36 2002/08/08 12:50:01 starvik
116 * Serial interrupt is shared with synchronous serial port driver
117 *
118 * Revision 1.35 2002/06/03 10:40:49 starvik
119 * Increased RS-485 RTS toggle timer to 2 characters
120 *
121 * Revision 1.34 2002/05/28 18:59:36 johana
122 * Whitespace and comment fixing to be more like etrax100ser.c 1.71.
123 *
124 * Revision 1.33 2002/05/28 17:55:43 johana
125 * RS-485 uses FAST_TIMER if enabled, and starts a short (one char time)
126 * timer from tranismit_chars (interrupt context).
127 * The timer toggles RTS in interrupt context when expired giving minimum
128 * latencies.
129 *
130 * Revision 1.32 2002/05/22 13:58:00 johana
131 * Renamed rs_write() to raw_write() and made it inline.
132 * New rs_write() handles RS-485 if configured and enabled
133 * (moved code from e100_write_rs485()).
134 * RS-485 ioctl's uses copy_from_user() instead of verify_area().
135 *
136 * Revision 1.31 2002/04/22 11:20:03 johana
137 * Updated copyright years.
138 *
139 * Revision 1.30 2002/04/22 09:39:12 johana
140 * RS-485 support compiles.
141 *
142 * Revision 1.29 2002/01/14 16:10:01 pkj
143 * Allocate the receive buffers dynamically. The static 4kB buffer was
144 * too small for the peaks. This means that we can get rid of the extra
145 * buffer and the copying to it. It also means we require less memory
146 * under normal operations, but can use more when needed (there is a
147 * cap at 64kB for safety reasons). If there is no memory available
148 * we panic(), and die a horrible death...
149 *
150 * Revision 1.28 2001/12/18 15:04:53 johana
151 * Cleaned up write_rs485() - now it works correctly without padding extra
152 * char.
153 * Added sane default initialisation of rs485.
154 * Added #ifdef around dummy variables.
155 *
156 * Revision 1.27 2001/11/29 17:00:41 pkj
157 * 2kB seems to be too small a buffer when using 921600 bps,
158 * so increase it to 4kB (this was already done for the elinux
159 * version of the serial driver).
160 *
161 * Revision 1.26 2001/11/19 14:20:41 pkj
162 * Minor changes to comments and unused code.
163 *
164 * Revision 1.25 2001/11/12 20:03:43 pkj
165 * Fixed compiler warnings.
166 *
167 * Revision 1.24 2001/11/12 15:10:05 pkj
168 * Total redesign of the receiving part of the serial driver.
169 * Uses eight chained descriptors to write to a 4kB buffer.
170 * This data is then serialised into a 2kB buffer. From there it
171 * is copied into the TTY's flip buffers when they become available.
172 * A lot of copying, and the sizes of the buffers might need to be
173 * tweaked, but all in all it should work better than the previous
174 * version, without the need to modify the TTY code in any way.
175 * Also note that erroneous bytes are now correctly marked in the
176 * flag buffers (instead of always marking the first byte).
177 *
178 * Revision 1.23 2001/10/30 17:53:26 pkj
179 * * Set info->uses_dma to 0 when a port is closed.
180 * * Mark the timer1 interrupt as a fast one (SA_INTERRUPT).
181 * * Call start_flush_timer() in start_receive() if
182 * CONFIG_ETRAX_SERIAL_FLUSH_DMA_FAST is defined.
183 *
184 * Revision 1.22 2001/10/30 17:44:03 pkj
185 * Use %lu for received and transmitted counters in line_info().
186 *
187 * Revision 1.21 2001/10/30 17:40:34 pkj
188 * Clean-up. The only change to functionality is that
189 * CONFIG_ETRAX_SERIAL_RX_TIMEOUT_TICKS(=5) is used instead of
190 * MAX_FLUSH_TIME(=8).
191 *
192 * Revision 1.20 2001/10/30 15:24:49 johana
193 * Added char_time stuff from 2.0 driver.
194 *
195 * Revision 1.19 2001/10/30 15:23:03 johana
196 * Merged with 1.13.2 branch + fixed indentation
197 * and changed CONFIG_ETRAX100_XYS to CONFIG_ETRAX_XYZ
198 *
199 * Revision 1.18 2001/09/24 09:27:22 pkj
200 * Completed ext_baud_table[] in cflag_to_baud() and cflag_to_etrax_baud().
201 *
202 * Revision 1.17 2001/08/24 11:32:49 ronny
203 * More fixes for the CONFIG_ETRAX_SERIAL_PORT0 define.
204 *
205 * Revision 1.16 2001/08/24 07:56:22 ronny
206 * Added config ifdefs around ser0 irq requests.
207 *
208 * Revision 1.15 2001/08/16 09:10:31 bjarne
209 * serial.c - corrected the initialization of rs_table, the wrong defines
210 * where used.
211 * Corrected a test in timed_flush_handler.
212 * Changed configured to enabled.
213 * serial.h - Changed configured to enabled.
214 *
215 * Revision 1.14 2001/08/15 07:31:23 bjarne
216 * Introduced two new members to the e100_serial struct.
217 * configured - Will be set to 1 if the port has been configured in .config
218 * uses_dma - Should be set to 1 if the port uses DMA. Currently it is set
219 * to 1
220 * when a port is opened. This is used to limit the DMA interrupt
221 * routines to only manipulate DMA channels actually used by the
222 * serial driver.
223 *
224 * Revision 1.13.2.2 2001/10/17 13:57:13 starvik
225 * Receiver was broken by the break fixes
226 *
227 * Revision 1.13.2.1 2001/07/20 13:57:39 ronny
228 * Merge with new stuff from etrax100ser.c. Works but haven't checked stuff
229 * like break handling.
230 *
231 * Revision 1.13 2001/05/09 12:40:31 johana
232 * Use DMA_NBR and IRQ_NBR defines from dma.h and irq.h
233 *
234 * Revision 1.12 2001/04/19 12:23:07 bjornw
235 * CONFIG_RS485 -> CONFIG_ETRAX_RS485
236 *
237 * Revision 1.11 2001/04/05 14:29:48 markusl
238 * Updated according to review remarks i.e.
239 * -Use correct types in port structure to avoid compiler warnings
240 * -Try to use IO_* macros whenever possible
241 * -Open should never return -EBUSY
242 *
243 * Revision 1.10 2001/03/05 13:14:07 bjornw
244 * Another spelling fix
245 *
246 * Revision 1.9 2001/02/23 13:46:38 bjornw
247 * Spellling check
248 *
249 * Revision 1.8 2001/01/23 14:56:35 markusl
250 * Made use of ser1 optional
251 * Needed by USB
252 *
253 * Revision 1.7 2001/01/19 16:14:48 perf
254 * Added kernel options for serial ports 234.
255 * Changed option names from CONFIG_ETRAX100_XYZ to CONFIG_ETRAX_XYZ.
256 *
257 * Revision 1.6 2000/11/22 16:36:09 bjornw
258 * Please marketing by using the correct case when spelling Etrax.
259 *
260 * Revision 1.5 2000/11/21 16:43:37 bjornw
261 * Fixed so it compiles under CONFIG_SVINTO_SIM
262 *
263 * Revision 1.4 2000/11/15 17:34:12 bjornw
264 * Added a timeout timer for flushing input channels. The interrupt-based
265 * fast flush system should be easy to merge with this later (works the same
266 * way, only with an irq instead of a system timer_list)
267 *
268 * Revision 1.3 2000/11/13 17:19:57 bjornw
269 * * Incredibly, this almost complete rewrite of serial.c worked (at least
270 * for output) the first time.
271 *
272 * Items worth noticing:
273 *
274 * No Etrax100 port 1 workarounds (does only compile on 2.4 anyway now)
275 * RS485 is not ported (why can't it be done in userspace as on x86 ?)
276 * Statistics done through async_icount - if any more stats are needed,
277 * that's the place to put them or in an arch-dep version of it.
278 * timeout_interrupt and the other fast timeout stuff not ported yet
279 * There be dragons in this 3k+ line driver
280 *
281 * Revision 1.2 2000/11/10 16:50:28 bjornw
282 * First shot at a 2.4 port, does not compile totally yet
283 *
284 * Revision 1.1 2000/11/10 16:47:32 bjornw
285 * Added verbatim copy of rev 1.49 etrax100ser.c from elinux
286 *
287 * Revision 1.49 2000/10/30 15:47:14 tobiasa
288 * Changed version number.
289 *
290 * Revision 1.48 2000/10/25 11:02:43 johana
291 * Changed %ul to %lu in printf's
292 *
293 * Revision 1.47 2000/10/18 15:06:53 pkj
294 * Compile correctly with CONFIG_ETRAX_SERIAL_FLUSH_DMA_FAST and
295 * CONFIG_ETRAX_SERIAL_PROC_ENTRY together.
296 * Some clean-up of the /proc/serial file.
297 *
298 * Revision 1.46 2000/10/16 12:59:40 johana
299 * Added CONFIG_ETRAX_SERIAL_PROC_ENTRY for statistics and debug info.
300 *
301 * Revision 1.45 2000/10/13 17:10:59 pkj
302 * Do not flush DMAs while flipping TTY buffers.
303 *
304 * Revision 1.44 2000/10/13 16:34:29 pkj
305 * Added a delay in ser_interrupt() for 2.3ms when an error is detected.
306 * We do not know why this delay is required yet, but without it the
307 * irmaflash program does not work (this was the program that needed
308 * the ser_interrupt() to be needed in the first place). This should not
309 * affect normal use of the serial ports.
310 *
311 * Revision 1.43 2000/10/13 16:30:44 pkj
312 * New version of the fast flush of serial buffers code. This time
313 * it is localized to the serial driver and uses a fast timer to
314 * do the work.
315 *
316 * Revision 1.42 2000/10/13 14:54:26 bennyo
317 * Fix for switching RTS when using rs485
318 *
319 * Revision 1.41 2000/10/12 11:43:44 pkj
320 * Cleaned up a number of comments.
321 *
322 * Revision 1.40 2000/10/10 11:58:39 johana
323 * Made RS485 support generic for all ports.
324 * Toggle rts in interrupt if no delay wanted.
325 * WARNING: No true transmitter empty check??
326 * Set d_wait bit when sending data so interrupt is delayed until
327 * fifo flushed. (Fix tcdrain() problem)
328 *
329 * Revision 1.39 2000/10/04 16:08:02 bjornw
330 * * Use virt_to_phys etc. for DMA addresses
331 * * Removed CONFIG_FLUSH_DMA_FAST hacks
332 * * Indentation fix
333 *
334 * Revision 1.38 2000/10/02 12:27:10 mattias
335 * * added variable used when using fast flush on serial dma.
336 * (CONFIG_FLUSH_DMA_FAST)
337 *
338 * Revision 1.37 2000/09/27 09:44:24 pkj
339 * Uncomment definition of SERIAL_HANDLE_EARLY_ERRORS.
340 *
341 * Revision 1.36 2000/09/20 13:12:52 johana
342 * Support for CONFIG_ETRAX_SERIAL_RX_TIMEOUT_TICKS:
343 * Number of timer ticks between flush of receive fifo (1 tick = 10ms).
344 * Try 0-3 for low latency applications. Approx 5 for high load
345 * applications (e.g. PPP). Maybe this should be more adaptive some day...
346 *
347 * Revision 1.35 2000/09/20 10:36:08 johana
348 * Typo in get_lsr_info()
349 *
350 * Revision 1.34 2000/09/20 10:29:59 johana
351 * Let rs_chars_in_buffer() check fifo content as well.
352 * get_lsr_info() might work now (not tested).
353 * Easier to change the port to debug.
354 *
355 * Revision 1.33 2000/09/13 07:52:11 torbjore
356 * Support RS485
357 *
358 * Revision 1.32 2000/08/31 14:45:37 bjornw
359 * After sending a break we need to reset the transmit DMA channel
360 *
361 * Revision 1.31 2000/06/21 12:13:29 johana
362 * Fixed wait for all chars sent when closing port.
363 * (Used to always take 1 second!)
364 * Added shadows for directions of status/ctrl signals.
365 *
366 * Revision 1.30 2000/05/29 16:27:55 bjornw
367 * Simulator ifdef moved a bit
368 *
369 * Revision 1.29 2000/05/09 09:40:30 mattias
370 * * Added description of dma registers used in timeout_interrupt
371 * * Removed old code
372 *
373 * Revision 1.28 2000/05/08 16:38:58 mattias
374 * * Bugfix for flushing fifo in timeout_interrupt
375 * Problem occurs when bluetooth stack waits for a small number of bytes
376 * containing an event acknowledging free buffers in bluetooth HW
377 * As before, data was stuck in fifo until more data came on uart and
378 * flushed it up to the stack.
379 *
380 * Revision 1.27 2000/05/02 09:52:28 jonasd
381 * Added fix for peculiar etrax behaviour when eop is forced on an empty
382 * fifo. This is used when flashing the IRMA chip. Disabled by default.
383 *
384 * Revision 1.26 2000/03/29 15:32:02 bjornw
385 * 2.0.34 updates
386 *
387 * Revision 1.25 2000/02/16 16:59:36 bjornw
388 * * Receive DMA directly into the flip-buffer, eliminating an intermediary
389 * receive buffer and a memcpy. Will avoid some overruns.
390 * * Error message on debug port if an overrun or flip buffer overrun occurs.
391 * * Just use the first byte in the flag flip buffer for errors.
392 * * Check for timeout on the serial ports only each 5/100 s, not 1/100.
393 *
394 * Revision 1.24 2000/02/09 18:02:28 bjornw
395 * * Clear serial errors (overrun, framing, parity) correctly. Before, the
396 * receiver would get stuck if an error occurred and we did not restart
397 * the input DMA.
398 * * Cosmetics (indentation, some code made into inlines)
399 * * Some more debug options
400 * * Actually shut down the serial port (DMA irq, DMA reset, receiver stop)
401 * when the last open is closed. Corresponding fixes in startup().
402 * * rs_close() "tx FIFO wait" code moved into right place, bug & -> && fixed
403 * and make a special case out of port 1 (R_DMA_CHx_STATUS is broken for that)
404 * * e100_disable_rx/enable_rx just disables/enables the receiver, not RTS
405 *
406 * Revision 1.23 2000/01/24 17:46:19 johana
407 * Wait for flush of DMA/FIFO when closing port.
408 *
409 * Revision 1.22 2000/01/20 18:10:23 johana
410 * Added TIOCMGET ioctl to return modem status.
411 * Implemented modem status/control that works with the extra signals
412 * (DTR, DSR, RI,CD) as well.
413 * 3 different modes supported:
414 * ser0 on PB (Bundy), ser1 on PB (Lisa) and ser2 on PA (Bundy)
415 * Fixed DEF_TX value that caused the serial transmitter pin (txd) to go to 0 when
416 * closing the last filehandle, NASTY!.
417 * Added break generation, not tested though!
418 * Use IRQF_SHARED when request_irq() for ser2 and ser3 (shared with) par0 and par1.
419 * You can't use them at the same time (yet..), but you can hopefully switch
420 * between ser2/par0, ser3/par1 with the same kernel config.
421 * Replaced some magic constants with defines
422 *
423 *
424 */ 8 */
425 9
426static char *serial_version = "$Revision: 1.25 $"; 10static char *serial_version = "$Revision: 1.25 $";
@@ -446,6 +30,7 @@ static char *serial_version = "$Revision: 1.25 $";
446 30
447#include <asm/io.h> 31#include <asm/io.h>
448#include <asm/irq.h> 32#include <asm/irq.h>
33#include <asm/dma.h>
449#include <asm/system.h> 34#include <asm/system.h>
450#include <linux/delay.h> 35#include <linux/delay.h>
451 36
@@ -454,8 +39,9 @@ static char *serial_version = "$Revision: 1.25 $";
454/* non-arch dependent serial structures are in linux/serial.h */ 39/* non-arch dependent serial structures are in linux/serial.h */
455#include <linux/serial.h> 40#include <linux/serial.h>
456/* while we keep our own stuff (struct e100_serial) in a local .h file */ 41/* while we keep our own stuff (struct e100_serial) in a local .h file */
457#include "serial.h" 42#include "crisv10.h"
458#include <asm/fasttimer.h> 43#include <asm/fasttimer.h>
44#include <asm/arch/io_interface_mux.h>
459 45
460#ifdef CONFIG_ETRAX_SERIAL_FAST_TIMER 46#ifdef CONFIG_ETRAX_SERIAL_FAST_TIMER
461#ifndef CONFIG_ETRAX_FAST_TIMER 47#ifndef CONFIG_ETRAX_FAST_TIMER
@@ -504,18 +90,6 @@ struct tty_driver *serial_driver;
504 from eLinux */ 90 from eLinux */
505#define SERIAL_HANDLE_EARLY_ERRORS 91#define SERIAL_HANDLE_EARLY_ERRORS
506 92
507/* Defined and used in n_tty.c, but we need it here as well */
508#define TTY_THRESHOLD_THROTTLE 128
509
510/* Due to buffersizes and threshold values, our SERIAL_DESCR_BUF_SIZE
511 * must not be to high or flow control won't work if we leave it to the tty
512 * layer so we have our own throttling in flush_to_flip
513 * TTY_FLIPBUF_SIZE=512,
514 * TTY_THRESHOLD_THROTTLE/UNTHROTTLE=128
515 * BUF_SIZE can't be > 128
516 */
517#define CRIS_BUF_SIZE 512
518
519/* Currently 16 descriptors x 128 bytes = 2048 bytes */ 93/* Currently 16 descriptors x 128 bytes = 2048 bytes */
520#define SERIAL_DESCR_BUF_SIZE 256 94#define SERIAL_DESCR_BUF_SIZE 256
521 95
@@ -588,13 +162,13 @@ unsigned long timer_data_to_ns(unsigned long timer_data);
588static void change_speed(struct e100_serial *info); 162static void change_speed(struct e100_serial *info);
589static void rs_throttle(struct tty_struct * tty); 163static void rs_throttle(struct tty_struct * tty);
590static void rs_wait_until_sent(struct tty_struct *tty, int timeout); 164static void rs_wait_until_sent(struct tty_struct *tty, int timeout);
591static int rs_write(struct tty_struct * tty, int from_user, 165static int rs_write(struct tty_struct *tty,
592 const unsigned char *buf, int count); 166 const unsigned char *buf, int count);
593#ifdef CONFIG_ETRAX_RS485 167#ifdef CONFIG_ETRAX_RS485
594static int e100_write_rs485(struct tty_struct * tty, int from_user, 168static int e100_write_rs485(struct tty_struct *tty,
595 const unsigned char *buf, int count); 169 const unsigned char *buf, int count);
596#endif 170#endif
597static int get_lsr_info(struct e100_serial * info, unsigned int *value); 171static int get_lsr_info(struct e100_serial *info, unsigned int *value);
598 172
599 173
600#define DEF_BAUD 115200 /* 115.2 kbit/s */ 174#define DEF_BAUD 115200 /* 115.2 kbit/s */
@@ -679,20 +253,39 @@ static struct e100_serial rs_table[] = {
679 .rx_ctrl = DEF_RX, 253 .rx_ctrl = DEF_RX,
680 .tx_ctrl = DEF_TX, 254 .tx_ctrl = DEF_TX,
681 .iseteop = 2, 255 .iseteop = 2,
256 .dma_owner = dma_ser0,
257 .io_if = if_serial_0,
682#ifdef CONFIG_ETRAX_SERIAL_PORT0 258#ifdef CONFIG_ETRAX_SERIAL_PORT0
683 .enabled = 1, 259 .enabled = 1,
684#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA6_OUT 260#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA6_OUT
685 .dma_out_enabled = 1, 261 .dma_out_enabled = 1,
262 .dma_out_nbr = SER0_TX_DMA_NBR,
263 .dma_out_irq_nbr = SER0_DMA_TX_IRQ_NBR,
264 .dma_out_irq_flags = IRQF_DISABLED,
265 .dma_out_irq_description = "serial 0 dma tr",
686#else 266#else
687 .dma_out_enabled = 0, 267 .dma_out_enabled = 0,
268 .dma_out_nbr = UINT_MAX,
269 .dma_out_irq_nbr = 0,
270 .dma_out_irq_flags = 0,
271 .dma_out_irq_description = NULL,
688#endif 272#endif
689#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA7_IN 273#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA7_IN
690 .dma_in_enabled = 1, 274 .dma_in_enabled = 1,
275 .dma_in_nbr = SER0_RX_DMA_NBR,
276 .dma_in_irq_nbr = SER0_DMA_RX_IRQ_NBR,
277 .dma_in_irq_flags = IRQF_DISABLED,
278 .dma_in_irq_description = "serial 0 dma rec",
691#else 279#else
692 .dma_in_enabled = 0 280 .dma_in_enabled = 0,
281 .dma_in_nbr = UINT_MAX,
282 .dma_in_irq_nbr = 0,
283 .dma_in_irq_flags = 0,
284 .dma_in_irq_description = NULL,
693#endif 285#endif
694#else 286#else
695 .enabled = 0, 287 .enabled = 0,
288 .io_if_description = NULL,
696 .dma_out_enabled = 0, 289 .dma_out_enabled = 0,
697 .dma_in_enabled = 0 290 .dma_in_enabled = 0
698#endif 291#endif
@@ -714,20 +307,42 @@ static struct e100_serial rs_table[] = {
714 .rx_ctrl = DEF_RX, 307 .rx_ctrl = DEF_RX,
715 .tx_ctrl = DEF_TX, 308 .tx_ctrl = DEF_TX,
716 .iseteop = 3, 309 .iseteop = 3,
310 .dma_owner = dma_ser1,
311 .io_if = if_serial_1,
717#ifdef CONFIG_ETRAX_SERIAL_PORT1 312#ifdef CONFIG_ETRAX_SERIAL_PORT1
718 .enabled = 1, 313 .enabled = 1,
314 .io_if_description = "ser1",
719#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA8_OUT 315#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA8_OUT
720 .dma_out_enabled = 1, 316 .dma_out_enabled = 1,
317 .dma_out_nbr = SER1_TX_DMA_NBR,
318 .dma_out_irq_nbr = SER1_DMA_TX_IRQ_NBR,
319 .dma_out_irq_flags = IRQF_DISABLED,
320 .dma_out_irq_description = "serial 1 dma tr",
721#else 321#else
722 .dma_out_enabled = 0, 322 .dma_out_enabled = 0,
323 .dma_out_nbr = UINT_MAX,
324 .dma_out_irq_nbr = 0,
325 .dma_out_irq_flags = 0,
326 .dma_out_irq_description = NULL,
723#endif 327#endif
724#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA9_IN 328#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA9_IN
725 .dma_in_enabled = 1, 329 .dma_in_enabled = 1,
330 .dma_in_nbr = SER1_RX_DMA_NBR,
331 .dma_in_irq_nbr = SER1_DMA_RX_IRQ_NBR,
332 .dma_in_irq_flags = IRQF_DISABLED,
333 .dma_in_irq_description = "serial 1 dma rec",
726#else 334#else
727 .dma_in_enabled = 0 335 .dma_in_enabled = 0,
336 .dma_in_enabled = 0,
337 .dma_in_nbr = UINT_MAX,
338 .dma_in_irq_nbr = 0,
339 .dma_in_irq_flags = 0,
340 .dma_in_irq_description = NULL,
728#endif 341#endif
729#else 342#else
730 .enabled = 0, 343 .enabled = 0,
344 .io_if_description = NULL,
345 .dma_in_irq_nbr = 0,
731 .dma_out_enabled = 0, 346 .dma_out_enabled = 0,
732 .dma_in_enabled = 0 347 .dma_in_enabled = 0
733#endif 348#endif
@@ -748,20 +363,40 @@ static struct e100_serial rs_table[] = {
748 .rx_ctrl = DEF_RX, 363 .rx_ctrl = DEF_RX,
749 .tx_ctrl = DEF_TX, 364 .tx_ctrl = DEF_TX,
750 .iseteop = 0, 365 .iseteop = 0,
366 .dma_owner = dma_ser2,
367 .io_if = if_serial_2,
751#ifdef CONFIG_ETRAX_SERIAL_PORT2 368#ifdef CONFIG_ETRAX_SERIAL_PORT2
752 .enabled = 1, 369 .enabled = 1,
370 .io_if_description = "ser2",
753#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA2_OUT 371#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA2_OUT
754 .dma_out_enabled = 1, 372 .dma_out_enabled = 1,
373 .dma_out_nbr = SER2_TX_DMA_NBR,
374 .dma_out_irq_nbr = SER2_DMA_TX_IRQ_NBR,
375 .dma_out_irq_flags = IRQF_DISABLED,
376 .dma_out_irq_description = "serial 2 dma tr",
755#else 377#else
756 .dma_out_enabled = 0, 378 .dma_out_enabled = 0,
379 .dma_out_nbr = UINT_MAX,
380 .dma_out_irq_nbr = 0,
381 .dma_out_irq_flags = 0,
382 .dma_out_irq_description = NULL,
757#endif 383#endif
758#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA3_IN 384#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA3_IN
759 .dma_in_enabled = 1, 385 .dma_in_enabled = 1,
386 .dma_in_nbr = SER2_RX_DMA_NBR,
387 .dma_in_irq_nbr = SER2_DMA_RX_IRQ_NBR,
388 .dma_in_irq_flags = IRQF_DISABLED,
389 .dma_in_irq_description = "serial 2 dma rec",
760#else 390#else
761 .dma_in_enabled = 0 391 .dma_in_enabled = 0,
392 .dma_in_nbr = UINT_MAX,
393 .dma_in_irq_nbr = 0,
394 .dma_in_irq_flags = 0,
395 .dma_in_irq_description = NULL,
762#endif 396#endif
763#else 397#else
764 .enabled = 0, 398 .enabled = 0,
399 .io_if_description = NULL,
765 .dma_out_enabled = 0, 400 .dma_out_enabled = 0,
766 .dma_in_enabled = 0 401 .dma_in_enabled = 0
767#endif 402#endif
@@ -782,20 +417,40 @@ static struct e100_serial rs_table[] = {
782 .rx_ctrl = DEF_RX, 417 .rx_ctrl = DEF_RX,
783 .tx_ctrl = DEF_TX, 418 .tx_ctrl = DEF_TX,
784 .iseteop = 1, 419 .iseteop = 1,
420 .dma_owner = dma_ser3,
421 .io_if = if_serial_3,
785#ifdef CONFIG_ETRAX_SERIAL_PORT3 422#ifdef CONFIG_ETRAX_SERIAL_PORT3
786 .enabled = 1, 423 .enabled = 1,
424 .io_if_description = "ser3",
787#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA4_OUT 425#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA4_OUT
788 .dma_out_enabled = 1, 426 .dma_out_enabled = 1,
427 .dma_out_nbr = SER3_TX_DMA_NBR,
428 .dma_out_irq_nbr = SER3_DMA_TX_IRQ_NBR,
429 .dma_out_irq_flags = IRQF_DISABLED,
430 .dma_out_irq_description = "serial 3 dma tr",
789#else 431#else
790 .dma_out_enabled = 0, 432 .dma_out_enabled = 0,
433 .dma_out_nbr = UINT_MAX,
434 .dma_out_irq_nbr = 0,
435 .dma_out_irq_flags = 0,
436 .dma_out_irq_description = NULL,
791#endif 437#endif
792#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA5_IN 438#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA5_IN
793 .dma_in_enabled = 1, 439 .dma_in_enabled = 1,
440 .dma_in_nbr = SER3_RX_DMA_NBR,
441 .dma_in_irq_nbr = SER3_DMA_RX_IRQ_NBR,
442 .dma_in_irq_flags = IRQF_DISABLED,
443 .dma_in_irq_description = "serial 3 dma rec",
794#else 444#else
795 .dma_in_enabled = 0 445 .dma_in_enabled = 0,
446 .dma_in_nbr = UINT_MAX,
447 .dma_in_irq_nbr = 0,
448 .dma_in_irq_flags = 0,
449 .dma_in_irq_description = NULL
796#endif 450#endif
797#else 451#else
798 .enabled = 0, 452 .enabled = 0,
453 .io_if_description = NULL,
799 .dma_out_enabled = 0, 454 .dma_out_enabled = 0,
800 .dma_in_enabled = 0 455 .dma_in_enabled = 0
801#endif 456#endif
@@ -1416,12 +1071,11 @@ e100_dtr(struct e100_serial *info, int set)
1416 { 1071 {
1417 unsigned long flags; 1072 unsigned long flags;
1418 1073
1419 save_flags(flags); 1074 local_irq_save(flags);
1420 cli();
1421 *e100_modem_pins[info->line].dtr_shadow &= ~mask; 1075 *e100_modem_pins[info->line].dtr_shadow &= ~mask;
1422 *e100_modem_pins[info->line].dtr_shadow |= (set ? 0 : mask); 1076 *e100_modem_pins[info->line].dtr_shadow |= (set ? 0 : mask);
1423 *e100_modem_pins[info->line].dtr_port = *e100_modem_pins[info->line].dtr_shadow; 1077 *e100_modem_pins[info->line].dtr_port = *e100_modem_pins[info->line].dtr_shadow;
1424 restore_flags(flags); 1078 local_irq_restore(flags);
1425 } 1079 }
1426 1080
1427#ifdef SERIAL_DEBUG_IO 1081#ifdef SERIAL_DEBUG_IO
@@ -1440,12 +1094,11 @@ e100_rts(struct e100_serial *info, int set)
1440{ 1094{
1441#ifndef CONFIG_SVINTO_SIM 1095#ifndef CONFIG_SVINTO_SIM
1442 unsigned long flags; 1096 unsigned long flags;
1443 save_flags(flags); 1097 local_irq_save(flags);
1444 cli();
1445 info->rx_ctrl &= ~E100_RTS_MASK; 1098 info->rx_ctrl &= ~E100_RTS_MASK;
1446 info->rx_ctrl |= (set ? 0 : E100_RTS_MASK); /* RTS is active low */ 1099 info->rx_ctrl |= (set ? 0 : E100_RTS_MASK); /* RTS is active low */
1447 info->port[REG_REC_CTRL] = info->rx_ctrl; 1100 info->port[REG_REC_CTRL] = info->rx_ctrl;
1448 restore_flags(flags); 1101 local_irq_restore(flags);
1449#ifdef SERIAL_DEBUG_IO 1102#ifdef SERIAL_DEBUG_IO
1450 printk("ser%i rts %i\n", info->line, set); 1103 printk("ser%i rts %i\n", info->line, set);
1451#endif 1104#endif
@@ -1463,12 +1116,11 @@ e100_ri_out(struct e100_serial *info, int set)
1463 unsigned char mask = e100_modem_pins[info->line].ri_mask; 1116 unsigned char mask = e100_modem_pins[info->line].ri_mask;
1464 unsigned long flags; 1117 unsigned long flags;
1465 1118
1466 save_flags(flags); 1119 local_irq_save(flags);
1467 cli();
1468 *e100_modem_pins[info->line].ri_shadow &= ~mask; 1120 *e100_modem_pins[info->line].ri_shadow &= ~mask;
1469 *e100_modem_pins[info->line].ri_shadow |= (set ? 0 : mask); 1121 *e100_modem_pins[info->line].ri_shadow |= (set ? 0 : mask);
1470 *e100_modem_pins[info->line].ri_port = *e100_modem_pins[info->line].ri_shadow; 1122 *e100_modem_pins[info->line].ri_port = *e100_modem_pins[info->line].ri_shadow;
1471 restore_flags(flags); 1123 local_irq_restore(flags);
1472 } 1124 }
1473#endif 1125#endif
1474} 1126}
@@ -1481,12 +1133,11 @@ e100_cd_out(struct e100_serial *info, int set)
1481 unsigned char mask = e100_modem_pins[info->line].cd_mask; 1133 unsigned char mask = e100_modem_pins[info->line].cd_mask;
1482 unsigned long flags; 1134 unsigned long flags;
1483 1135
1484 save_flags(flags); 1136 local_irq_save(flags);
1485 cli();
1486 *e100_modem_pins[info->line].cd_shadow &= ~mask; 1137 *e100_modem_pins[info->line].cd_shadow &= ~mask;
1487 *e100_modem_pins[info->line].cd_shadow |= (set ? 0 : mask); 1138 *e100_modem_pins[info->line].cd_shadow |= (set ? 0 : mask);
1488 *e100_modem_pins[info->line].cd_port = *e100_modem_pins[info->line].cd_shadow; 1139 *e100_modem_pins[info->line].cd_port = *e100_modem_pins[info->line].cd_shadow;
1489 restore_flags(flags); 1140 local_irq_restore(flags);
1490 } 1141 }
1491#endif 1142#endif
1492} 1143}
@@ -1560,8 +1211,7 @@ static void e100_disable_txdma_channel(struct e100_serial *info)
1560 /* Disable output DMA channel for the serial port in question 1211 /* Disable output DMA channel for the serial port in question
1561 * ( set to something other then serialX) 1212 * ( set to something other then serialX)
1562 */ 1213 */
1563 save_flags(flags); 1214 local_irq_save(flags);
1564 cli();
1565 DFLOW(DEBUG_LOG(info->line, "disable_txdma_channel %i\n", info->line)); 1215 DFLOW(DEBUG_LOG(info->line, "disable_txdma_channel %i\n", info->line));
1566 if (info->line == 0) { 1216 if (info->line == 0) {
1567 if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma6)) == 1217 if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma6)) ==
@@ -1589,7 +1239,7 @@ static void e100_disable_txdma_channel(struct e100_serial *info)
1589 } 1239 }
1590 } 1240 }
1591 *R_GEN_CONFIG = genconfig_shadow; 1241 *R_GEN_CONFIG = genconfig_shadow;
1592 restore_flags(flags); 1242 local_irq_restore(flags);
1593} 1243}
1594 1244
1595 1245
@@ -1597,8 +1247,7 @@ static void e100_enable_txdma_channel(struct e100_serial *info)
1597{ 1247{
1598 unsigned long flags; 1248 unsigned long flags;
1599 1249
1600 save_flags(flags); 1250 local_irq_save(flags);
1601 cli();
1602 DFLOW(DEBUG_LOG(info->line, "enable_txdma_channel %i\n", info->line)); 1251 DFLOW(DEBUG_LOG(info->line, "enable_txdma_channel %i\n", info->line));
1603 /* Enable output DMA channel for the serial port in question */ 1252 /* Enable output DMA channel for the serial port in question */
1604 if (info->line == 0) { 1253 if (info->line == 0) {
@@ -1615,7 +1264,7 @@ static void e100_enable_txdma_channel(struct e100_serial *info)
1615 genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma4, serial3); 1264 genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma4, serial3);
1616 } 1265 }
1617 *R_GEN_CONFIG = genconfig_shadow; 1266 *R_GEN_CONFIG = genconfig_shadow;
1618 restore_flags(flags); 1267 local_irq_restore(flags);
1619} 1268}
1620 1269
1621static void e100_disable_rxdma_channel(struct e100_serial *info) 1270static void e100_disable_rxdma_channel(struct e100_serial *info)
@@ -1625,8 +1274,7 @@ static void e100_disable_rxdma_channel(struct e100_serial *info)
1625 /* Disable input DMA channel for the serial port in question 1274 /* Disable input DMA channel for the serial port in question
1626 * ( set to something other then serialX) 1275 * ( set to something other then serialX)
1627 */ 1276 */
1628 save_flags(flags); 1277 local_irq_save(flags);
1629 cli();
1630 if (info->line == 0) { 1278 if (info->line == 0) {
1631 if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma7)) == 1279 if ((genconfig_shadow & IO_MASK(R_GEN_CONFIG, dma7)) ==
1632 IO_STATE(R_GEN_CONFIG, dma7, serial0)) { 1280 IO_STATE(R_GEN_CONFIG, dma7, serial0)) {
@@ -1653,7 +1301,7 @@ static void e100_disable_rxdma_channel(struct e100_serial *info)
1653 } 1301 }
1654 } 1302 }
1655 *R_GEN_CONFIG = genconfig_shadow; 1303 *R_GEN_CONFIG = genconfig_shadow;
1656 restore_flags(flags); 1304 local_irq_restore(flags);
1657} 1305}
1658 1306
1659 1307
@@ -1661,8 +1309,7 @@ static void e100_enable_rxdma_channel(struct e100_serial *info)
1661{ 1309{
1662 unsigned long flags; 1310 unsigned long flags;
1663 1311
1664 save_flags(flags); 1312 local_irq_save(flags);
1665 cli();
1666 /* Enable input DMA channel for the serial port in question */ 1313 /* Enable input DMA channel for the serial port in question */
1667 if (info->line == 0) { 1314 if (info->line == 0) {
1668 genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma7); 1315 genconfig_shadow &= ~IO_MASK(R_GEN_CONFIG, dma7);
@@ -1678,7 +1325,7 @@ static void e100_enable_rxdma_channel(struct e100_serial *info)
1678 genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma5, serial3); 1325 genconfig_shadow |= IO_STATE(R_GEN_CONFIG, dma5, serial3);
1679 } 1326 }
1680 *R_GEN_CONFIG = genconfig_shadow; 1327 *R_GEN_CONFIG = genconfig_shadow;
1681 restore_flags(flags); 1328 local_irq_restore(flags);
1682} 1329}
1683 1330
1684#ifdef SERIAL_HANDLE_EARLY_ERRORS 1331#ifdef SERIAL_HANDLE_EARLY_ERRORS
@@ -1785,7 +1432,7 @@ e100_enable_rs485(struct tty_struct *tty,struct rs485_control *r)
1785} 1432}
1786 1433
1787static int 1434static int
1788e100_write_rs485(struct tty_struct *tty, int from_user, 1435e100_write_rs485(struct tty_struct *tty,
1789 const unsigned char *buf, int count) 1436 const unsigned char *buf, int count)
1790{ 1437{
1791 struct e100_serial * info = (struct e100_serial *)tty->driver_data; 1438 struct e100_serial * info = (struct e100_serial *)tty->driver_data;
@@ -1798,7 +1445,7 @@ e100_write_rs485(struct tty_struct *tty, int from_user,
1798 */ 1445 */
1799 info->rs485.enabled = 1; 1446 info->rs485.enabled = 1;
1800 /* rs_write now deals with RS485 if enabled */ 1447 /* rs_write now deals with RS485 if enabled */
1801 count = rs_write(tty, from_user, buf, count); 1448 count = rs_write(tty, buf, count);
1802 info->rs485.enabled = old_enabled; 1449 info->rs485.enabled = old_enabled;
1803 return count; 1450 return count;
1804} 1451}
@@ -1836,7 +1483,7 @@ rs_stop(struct tty_struct *tty)
1836 unsigned long flags; 1483 unsigned long flags;
1837 unsigned long xoff; 1484 unsigned long xoff;
1838 1485
1839 save_flags(flags); cli(); 1486 local_irq_save(flags);
1840 DFLOW(DEBUG_LOG(info->line, "XOFF rs_stop xmit %i\n", 1487 DFLOW(DEBUG_LOG(info->line, "XOFF rs_stop xmit %i\n",
1841 CIRC_CNT(info->xmit.head, 1488 CIRC_CNT(info->xmit.head,
1842 info->xmit.tail,SERIAL_XMIT_SIZE))); 1489 info->xmit.tail,SERIAL_XMIT_SIZE)));
@@ -1848,7 +1495,7 @@ rs_stop(struct tty_struct *tty)
1848 } 1495 }
1849 1496
1850 *((unsigned long *)&info->port[REG_XOFF]) = xoff; 1497 *((unsigned long *)&info->port[REG_XOFF]) = xoff;
1851 restore_flags(flags); 1498 local_irq_restore(flags);
1852 } 1499 }
1853} 1500}
1854 1501
@@ -1860,7 +1507,7 @@ rs_start(struct tty_struct *tty)
1860 unsigned long flags; 1507 unsigned long flags;
1861 unsigned long xoff; 1508 unsigned long xoff;
1862 1509
1863 save_flags(flags); cli(); 1510 local_irq_save(flags);
1864 DFLOW(DEBUG_LOG(info->line, "XOFF rs_start xmit %i\n", 1511 DFLOW(DEBUG_LOG(info->line, "XOFF rs_start xmit %i\n",
1865 CIRC_CNT(info->xmit.head, 1512 CIRC_CNT(info->xmit.head,
1866 info->xmit.tail,SERIAL_XMIT_SIZE))); 1513 info->xmit.tail,SERIAL_XMIT_SIZE)));
@@ -1875,7 +1522,7 @@ rs_start(struct tty_struct *tty)
1875 info->xmit.head != info->xmit.tail && info->xmit.buf) 1522 info->xmit.head != info->xmit.tail && info->xmit.buf)
1876 e100_enable_serial_tx_ready_irq(info); 1523 e100_enable_serial_tx_ready_irq(info);
1877 1524
1878 restore_flags(flags); 1525 local_irq_restore(flags);
1879 } 1526 }
1880} 1527}
1881 1528
@@ -2055,8 +1702,7 @@ static int serial_fast_timer_expired = 0;
2055static void flush_timeout_function(unsigned long data); 1702static void flush_timeout_function(unsigned long data);
2056#define START_FLUSH_FAST_TIMER_TIME(info, string, usec) {\ 1703#define START_FLUSH_FAST_TIMER_TIME(info, string, usec) {\
2057 unsigned long timer_flags; \ 1704 unsigned long timer_flags; \
2058 save_flags(timer_flags); \ 1705 local_irq_save(timer_flags); \
2059 cli(); \
2060 if (fast_timers[info->line].function == NULL) { \ 1706 if (fast_timers[info->line].function == NULL) { \
2061 serial_fast_timer_started++; \ 1707 serial_fast_timer_started++; \
2062 TIMERD(DEBUG_LOG(info->line, "start_timer %i ", info->line)); \ 1708 TIMERD(DEBUG_LOG(info->line, "start_timer %i ", info->line)); \
@@ -2070,7 +1716,7 @@ static void flush_timeout_function(unsigned long data);
2070 else { \ 1716 else { \
2071 TIMERD(DEBUG_LOG(info->line, "timer %i already running\n", info->line)); \ 1717 TIMERD(DEBUG_LOG(info->line, "timer %i already running\n", info->line)); \
2072 } \ 1718 } \
2073 restore_flags(timer_flags); \ 1719 local_irq_restore(timer_flags); \
2074} 1720}
2075#define START_FLUSH_FAST_TIMER(info, string) START_FLUSH_FAST_TIMER_TIME(info, string, info->flush_time_usec) 1721#define START_FLUSH_FAST_TIMER(info, string) START_FLUSH_FAST_TIMER_TIME(info, string, info->flush_time_usec)
2076 1722
@@ -2099,8 +1745,7 @@ append_recv_buffer(struct e100_serial *info, struct etrax_recv_buffer *buffer)
2099{ 1745{
2100 unsigned long flags; 1746 unsigned long flags;
2101 1747
2102 save_flags(flags); 1748 local_irq_save(flags);
2103 cli();
2104 1749
2105 if (!info->first_recv_buffer) 1750 if (!info->first_recv_buffer)
2106 info->first_recv_buffer = buffer; 1751 info->first_recv_buffer = buffer;
@@ -2113,7 +1758,7 @@ append_recv_buffer(struct e100_serial *info, struct etrax_recv_buffer *buffer)
2113 if (info->recv_cnt > info->max_recv_cnt) 1758 if (info->recv_cnt > info->max_recv_cnt)
2114 info->max_recv_cnt = info->recv_cnt; 1759 info->max_recv_cnt = info->recv_cnt;
2115 1760
2116 restore_flags(flags); 1761 local_irq_restore(flags);
2117} 1762}
2118 1763
2119static int 1764static int
@@ -2133,11 +1778,7 @@ add_char_and_flag(struct e100_serial *info, unsigned char data, unsigned char fl
2133 info->icount.rx++; 1778 info->icount.rx++;
2134 } else { 1779 } else {
2135 struct tty_struct *tty = info->tty; 1780 struct tty_struct *tty = info->tty;
2136 *tty->flip.char_buf_ptr = data; 1781 tty_insert_flip_char(tty, data, flag);
2137 *tty->flip.flag_buf_ptr = flag;
2138 tty->flip.flag_buf_ptr++;
2139 tty->flip.char_buf_ptr++;
2140 tty->flip.count++;
2141 info->icount.rx++; 1782 info->icount.rx++;
2142 } 1783 }
2143 1784
@@ -2322,7 +1963,6 @@ start_receive(struct e100_serial *info)
2322 */ 1963 */
2323 return; 1964 return;
2324#endif 1965#endif
2325 info->tty->flip.count = 0;
2326 if (info->uses_dma_in) { 1966 if (info->uses_dma_in) {
2327 /* reset the input dma channel to be sure it works */ 1967 /* reset the input dma channel to be sure it works */
2328 1968
@@ -2484,32 +2124,20 @@ static void flush_to_flip_buffer(struct e100_serial *info)
2484{ 2124{
2485 struct tty_struct *tty; 2125 struct tty_struct *tty;
2486 struct etrax_recv_buffer *buffer; 2126 struct etrax_recv_buffer *buffer;
2487 unsigned int length;
2488 unsigned long flags; 2127 unsigned long flags;
2489 int max_flip_size;
2490
2491 if (!info->first_recv_buffer)
2492 return;
2493 2128
2494 save_flags(flags); 2129 local_irq_save(flags);
2495 cli(); 2130 tty = info->tty;
2496 2131
2497 if (!(tty = info->tty)) { 2132 if (!tty) {
2498 restore_flags(flags); 2133 local_irq_restore(flags);
2499 return; 2134 return;
2500 } 2135 }
2501 2136
2502 while ((buffer = info->first_recv_buffer) != NULL) { 2137 while ((buffer = info->first_recv_buffer) != NULL) {
2503 unsigned int count = buffer->length; 2138 unsigned int count = buffer->length;
2504 2139
2505 count = tty_buffer_request_room(tty, count); 2140 tty_insert_flip_string(tty, buffer->buffer, count);
2506 if (count == 0) /* Throttle ?? */
2507 break;
2508
2509 if (count > 1)
2510 tty_insert_flip_strings(tty, buffer->buffer, count - 1);
2511 tty_insert_flip_char(tty, buffer->buffer[count-1], buffer->error);
2512
2513 info->recv_cnt -= count; 2141 info->recv_cnt -= count;
2514 2142
2515 if (count == buffer->length) { 2143 if (count == buffer->length) {
@@ -2525,18 +2153,9 @@ static void flush_to_flip_buffer(struct e100_serial *info)
2525 if (!info->first_recv_buffer) 2153 if (!info->first_recv_buffer)
2526 info->last_recv_buffer = NULL; 2154 info->last_recv_buffer = NULL;
2527 2155
2528 restore_flags(flags); 2156 local_irq_restore(flags);
2529
2530 DFLIP(
2531 if (1) {
2532 DEBUG_LOG(info->line, "*** rxtot %i\n", info->icount.rx);
2533 DEBUG_LOG(info->line, "ldisc %lu\n", tty->ldisc.chars_in_buffer(tty));
2534 DEBUG_LOG(info->line, "room %lu\n", tty->ldisc.receive_room(tty));
2535 }
2536 2157
2537 ); 2158 /* This includes a check for low-latency */
2538
2539 /* this includes a check for low-latency */
2540 tty_flip_buffer_push(tty); 2159 tty_flip_buffer_push(tty);
2541} 2160}
2542 2161
@@ -2679,21 +2298,7 @@ struct e100_serial * handle_ser_rx_interrupt_no_dma(struct e100_serial *info)
2679 printk("!NO TTY!\n"); 2298 printk("!NO TTY!\n");
2680 return info; 2299 return info;
2681 } 2300 }
2682 if (tty->flip.count >= CRIS_BUF_SIZE - TTY_THRESHOLD_THROTTLE) { 2301
2683 /* check TTY_THROTTLED first so it indicates our state */
2684 if (!test_and_set_bit(TTY_THROTTLED, &tty->flags)) {
2685 DFLOW(DEBUG_LOG(info->line, "rs_throttle flip.count: %i\n", tty->flip.count));
2686 rs_throttle(tty);
2687 }
2688 }
2689 if (tty->flip.count >= CRIS_BUF_SIZE) {
2690 DEBUG_LOG(info->line, "force FLIP! %i\n", tty->flip.count);
2691 tty->flip.work.func((void *) tty);
2692 if (tty->flip.count >= CRIS_BUF_SIZE) {
2693 DEBUG_LOG(info->line, "FLIP FULL! %i\n", tty->flip.count);
2694 return info; /* if TTY_DONT_FLIP is set */
2695 }
2696 }
2697 /* Read data and status at the same time */ 2302 /* Read data and status at the same time */
2698 data_read = *((unsigned long *)&info->port[REG_DATA_STATUS32]); 2303 data_read = *((unsigned long *)&info->port[REG_DATA_STATUS32]);
2699more_data: 2304more_data:
@@ -2746,27 +2351,26 @@ more_data:
2746 DEBUG_LOG(info->line, "EBRK %i\n", info->break_detected_cnt); 2351 DEBUG_LOG(info->line, "EBRK %i\n", info->break_detected_cnt);
2747 info->errorcode = ERRCODE_INSERT_BREAK; 2352 info->errorcode = ERRCODE_INSERT_BREAK;
2748 } else { 2353 } else {
2354 unsigned char data = IO_EXTRACT(R_SERIAL0_READ,
2355 data_in, data_read);
2356 char flag = TTY_NORMAL;
2749 if (info->errorcode == ERRCODE_INSERT_BREAK) { 2357 if (info->errorcode == ERRCODE_INSERT_BREAK) {
2750 info->icount.brk++; 2358 struct tty_struct *tty = info->tty;
2751 *tty->flip.char_buf_ptr = 0; 2359 tty_insert_flip_char(tty, 0, flag);
2752 *tty->flip.flag_buf_ptr = TTY_BREAK;
2753 tty->flip.flag_buf_ptr++;
2754 tty->flip.char_buf_ptr++;
2755 tty->flip.count++;
2756 info->icount.rx++; 2360 info->icount.rx++;
2757 } 2361 }
2758 *tty->flip.char_buf_ptr = IO_EXTRACT(R_SERIAL0_READ, data_in, data_read);
2759 2362
2760 if (data_read & IO_MASK(R_SERIAL0_READ, par_err)) { 2363 if (data_read & IO_MASK(R_SERIAL0_READ, par_err)) {
2761 info->icount.parity++; 2364 info->icount.parity++;
2762 *tty->flip.flag_buf_ptr = TTY_PARITY; 2365 flag = TTY_PARITY;
2763 } else if (data_read & IO_MASK(R_SERIAL0_READ, overrun)) { 2366 } else if (data_read & IO_MASK(R_SERIAL0_READ, overrun)) {
2764 info->icount.overrun++; 2367 info->icount.overrun++;
2765 *tty->flip.flag_buf_ptr = TTY_OVERRUN; 2368 flag = TTY_OVERRUN;
2766 } else if (data_read & IO_MASK(R_SERIAL0_READ, framing_err)) { 2369 } else if (data_read & IO_MASK(R_SERIAL0_READ, framing_err)) {
2767 info->icount.frame++; 2370 info->icount.frame++;
2768 *tty->flip.flag_buf_ptr = TTY_FRAME; 2371 flag = TTY_FRAME;
2769 } 2372 }
2373 tty_insert_flip_char(tty, data, flag);
2770 info->errorcode = 0; 2374 info->errorcode = 0;
2771 } 2375 }
2772 info->break_detected_cnt = 0; 2376 info->break_detected_cnt = 0;
@@ -2782,16 +2386,14 @@ more_data:
2782 log_int(rdpc(), 0, 0); 2386 log_int(rdpc(), 0, 0);
2783 } 2387 }
2784 ); 2388 );
2785 *tty->flip.char_buf_ptr = IO_EXTRACT(R_SERIAL0_READ, data_in, data_read); 2389 tty_insert_flip_char(tty,
2786 *tty->flip.flag_buf_ptr = 0; 2390 IO_EXTRACT(R_SERIAL0_READ, data_in, data_read),
2391 TTY_NORMAL);
2787 } else { 2392 } else {
2788 DEBUG_LOG(info->line, "ser_rx int but no data_avail %08lX\n", data_read); 2393 DEBUG_LOG(info->line, "ser_rx int but no data_avail %08lX\n", data_read);
2789 } 2394 }
2790 2395
2791 2396
2792 tty->flip.flag_buf_ptr++;
2793 tty->flip.char_buf_ptr++;
2794 tty->flip.count++;
2795 info->icount.rx++; 2397 info->icount.rx++;
2796 data_read = *((unsigned long *)&info->port[REG_DATA_STATUS32]); 2398 data_read = *((unsigned long *)&info->port[REG_DATA_STATUS32]);
2797 if (data_read & IO_MASK(R_SERIAL0_READ, data_avail)) { 2399 if (data_read & IO_MASK(R_SERIAL0_READ, data_avail)) {
@@ -2929,7 +2531,7 @@ static void handle_ser_tx_interrupt(struct e100_serial *info)
2929 if (info->x_char) { 2531 if (info->x_char) {
2930 unsigned char rstat; 2532 unsigned char rstat;
2931 DFLOW(DEBUG_LOG(info->line, "tx_int: xchar 0x%02X\n", info->x_char)); 2533 DFLOW(DEBUG_LOG(info->line, "tx_int: xchar 0x%02X\n", info->x_char));
2932 save_flags(flags); cli(); 2534 local_irq_save(flags);
2933 rstat = info->port[REG_STATUS]; 2535 rstat = info->port[REG_STATUS];
2934 DFLOW(DEBUG_LOG(info->line, "stat %x\n", rstat)); 2536 DFLOW(DEBUG_LOG(info->line, "stat %x\n", rstat));
2935 2537
@@ -2938,7 +2540,7 @@ static void handle_ser_tx_interrupt(struct e100_serial *info)
2938 info->x_char = 0; 2540 info->x_char = 0;
2939 /* We must enable since it is disabled in ser_interrupt */ 2541 /* We must enable since it is disabled in ser_interrupt */
2940 e100_enable_serial_tx_ready_irq(info); 2542 e100_enable_serial_tx_ready_irq(info);
2941 restore_flags(flags); 2543 local_irq_restore(flags);
2942 return; 2544 return;
2943 } 2545 }
2944 if (info->uses_dma_out) { 2546 if (info->uses_dma_out) {
@@ -2946,7 +2548,7 @@ static void handle_ser_tx_interrupt(struct e100_serial *info)
2946 int i; 2548 int i;
2947 /* We only use normal tx interrupt when sending x_char */ 2549 /* We only use normal tx interrupt when sending x_char */
2948 DFLOW(DEBUG_LOG(info->line, "tx_int: xchar sent\n", 0)); 2550 DFLOW(DEBUG_LOG(info->line, "tx_int: xchar sent\n", 0));
2949 save_flags(flags); cli(); 2551 local_irq_save(flags);
2950 rstat = info->port[REG_STATUS]; 2552 rstat = info->port[REG_STATUS];
2951 DFLOW(DEBUG_LOG(info->line, "stat %x\n", rstat)); 2553 DFLOW(DEBUG_LOG(info->line, "stat %x\n", rstat));
2952 e100_disable_serial_tx_ready_irq(info); 2554 e100_disable_serial_tx_ready_irq(info);
@@ -2959,7 +2561,7 @@ static void handle_ser_tx_interrupt(struct e100_serial *info)
2959 nop(); 2561 nop();
2960 2562
2961 *info->ocmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, continue); 2563 *info->ocmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, continue);
2962 restore_flags(flags); 2564 local_irq_restore(flags);
2963 return; 2565 return;
2964 } 2566 }
2965 /* Normal char-by-char interrupt */ 2567 /* Normal char-by-char interrupt */
@@ -2973,7 +2575,7 @@ static void handle_ser_tx_interrupt(struct e100_serial *info)
2973 } 2575 }
2974 DINTR2(DEBUG_LOG(info->line, "tx_int %c\n", info->xmit.buf[info->xmit.tail])); 2576 DINTR2(DEBUG_LOG(info->line, "tx_int %c\n", info->xmit.buf[info->xmit.tail]));
2975 /* Send a byte, rs485 timing is critical so turn of ints */ 2577 /* Send a byte, rs485 timing is critical so turn of ints */
2976 save_flags(flags); cli(); 2578 local_irq_save(flags);
2977 info->port[REG_TR_DATA] = info->xmit.buf[info->xmit.tail]; 2579 info->port[REG_TR_DATA] = info->xmit.buf[info->xmit.tail];
2978 info->xmit.tail = (info->xmit.tail + 1) & (SERIAL_XMIT_SIZE-1); 2580 info->xmit.tail = (info->xmit.tail + 1) & (SERIAL_XMIT_SIZE-1);
2979 info->icount.tx++; 2581 info->icount.tx++;
@@ -2997,7 +2599,7 @@ static void handle_ser_tx_interrupt(struct e100_serial *info)
2997 /* We must enable since it is disabled in ser_interrupt */ 2599 /* We must enable since it is disabled in ser_interrupt */
2998 e100_enable_serial_tx_ready_irq(info); 2600 e100_enable_serial_tx_ready_irq(info);
2999 } 2601 }
3000 restore_flags(flags); 2602 local_irq_restore(flags);
3001 2603
3002 if (CIRC_CNT(info->xmit.head, 2604 if (CIRC_CNT(info->xmit.head,
3003 info->xmit.tail, 2605 info->xmit.tail,
@@ -3022,7 +2624,7 @@ ser_interrupt(int irq, void *dev_id)
3022 int handled = 0; 2624 int handled = 0;
3023 static volatile unsigned long reentered_ready_mask = 0; 2625 static volatile unsigned long reentered_ready_mask = 0;
3024 2626
3025 save_flags(flags); cli(); 2627 local_irq_save(flags);
3026 irq_mask1_rd = *R_IRQ_MASK1_RD; 2628 irq_mask1_rd = *R_IRQ_MASK1_RD;
3027 /* First handle all rx interrupts with ints disabled */ 2629 /* First handle all rx interrupts with ints disabled */
3028 info = rs_table; 2630 info = rs_table;
@@ -3067,7 +2669,7 @@ ser_interrupt(int irq, void *dev_id)
3067 /* Unblock the serial interrupt */ 2669 /* Unblock the serial interrupt */
3068 *R_VECT_MASK_SET = IO_STATE(R_VECT_MASK_SET, serial, set); 2670 *R_VECT_MASK_SET = IO_STATE(R_VECT_MASK_SET, serial, set);
3069 2671
3070 sti(); 2672 local_irq_enable();
3071 ready_mask = (1 << (8+1+2*0)); /* ser0 tr_ready */ 2673 ready_mask = (1 << (8+1+2*0)); /* ser0 tr_ready */
3072 info = rs_table; 2674 info = rs_table;
3073 for (i = 0; i < NR_PORTS; i++) { 2675 for (i = 0; i < NR_PORTS; i++) {
@@ -3080,11 +2682,11 @@ ser_interrupt(int irq, void *dev_id)
3080 ready_mask <<= 2; 2682 ready_mask <<= 2;
3081 } 2683 }
3082 /* handle_ser_tx_interrupt enables tr_ready interrupts */ 2684 /* handle_ser_tx_interrupt enables tr_ready interrupts */
3083 cli(); 2685 local_irq_disable();
3084 /* Handle reentered TX interrupt */ 2686 /* Handle reentered TX interrupt */
3085 irq_mask1_rd = reentered_ready_mask; 2687 irq_mask1_rd = reentered_ready_mask;
3086 } 2688 }
3087 cli(); 2689 local_irq_disable();
3088 tx_started = 0; 2690 tx_started = 0;
3089 } else { 2691 } else {
3090 unsigned long ready_mask; 2692 unsigned long ready_mask;
@@ -3100,7 +2702,7 @@ ser_interrupt(int irq, void *dev_id)
3100 } 2702 }
3101 } 2703 }
3102 2704
3103 restore_flags(flags); 2705 local_irq_restore(flags);
3104 return IRQ_RETVAL(handled); 2706 return IRQ_RETVAL(handled);
3105} /* ser_interrupt */ 2707} /* ser_interrupt */
3106#endif 2708#endif
@@ -3121,11 +2723,13 @@ ser_interrupt(int irq, void *dev_id)
3121 * them using rs_sched_event(), and they get done here. 2723 * them using rs_sched_event(), and they get done here.
3122 */ 2724 */
3123static void 2725static void
3124do_softint(void *private_) 2726do_softint(struct work_struct *work)
3125{ 2727{
3126 struct e100_serial *info = (struct e100_serial *) private_; 2728 struct e100_serial *info;
3127 struct tty_struct *tty; 2729 struct tty_struct *tty;
3128 2730
2731 info = container_of(work, struct e100_serial, work);
2732
3129 tty = info->tty; 2733 tty = info->tty;
3130 if (!tty) 2734 if (!tty)
3131 return; 2735 return;
@@ -3145,13 +2749,12 @@ startup(struct e100_serial * info)
3145 if (!xmit_page) 2749 if (!xmit_page)
3146 return -ENOMEM; 2750 return -ENOMEM;
3147 2751
3148 save_flags(flags); 2752 local_irq_save(flags);
3149 cli();
3150 2753
3151 /* if it was already initialized, skip this */ 2754 /* if it was already initialized, skip this */
3152 2755
3153 if (info->flags & ASYNC_INITIALIZED) { 2756 if (info->flags & ASYNC_INITIALIZED) {
3154 restore_flags(flags); 2757 local_irq_restore(flags);
3155 free_page(xmit_page); 2758 free_page(xmit_page);
3156 return 0; 2759 return 0;
3157 } 2760 }
@@ -3277,7 +2880,7 @@ startup(struct e100_serial * info)
3277 2880
3278 info->flags |= ASYNC_INITIALIZED; 2881 info->flags |= ASYNC_INITIALIZED;
3279 2882
3280 restore_flags(flags); 2883 local_irq_restore(flags);
3281 return 0; 2884 return 0;
3282} 2885}
3283 2886
@@ -3328,8 +2931,7 @@ shutdown(struct e100_serial * info)
3328 info->irq); 2931 info->irq);
3329#endif 2932#endif
3330 2933
3331 save_flags(flags); 2934 local_irq_save(flags);
3332 cli(); /* Disable interrupts */
3333 2935
3334 if (info->xmit.buf) { 2936 if (info->xmit.buf) {
3335 free_page((unsigned long)info->xmit.buf); 2937 free_page((unsigned long)info->xmit.buf);
@@ -3353,7 +2955,7 @@ shutdown(struct e100_serial * info)
3353 set_bit(TTY_IO_ERROR, &info->tty->flags); 2955 set_bit(TTY_IO_ERROR, &info->tty->flags);
3354 2956
3355 info->flags &= ~ASYNC_INITIALIZED; 2957 info->flags &= ~ASYNC_INITIALIZED;
3356 restore_flags(flags); 2958 local_irq_restore(flags);
3357} 2959}
3358 2960
3359 2961
@@ -3411,7 +3013,6 @@ change_speed(struct e100_serial *info)
3411 DBAUD(printk("using external baudrate: %lu\n", CONFIG_ETRAX_EXTERN_PB6CLK_FREQ/8)); 3013 DBAUD(printk("using external baudrate: %lu\n", CONFIG_ETRAX_EXTERN_PB6CLK_FREQ/8));
3412 info->baud = CONFIG_ETRAX_EXTERN_PB6CLK_FREQ/8; 3014 info->baud = CONFIG_ETRAX_EXTERN_PB6CLK_FREQ/8;
3413 } 3015 }
3414 }
3415#endif 3016#endif
3416 else 3017 else
3417 { 3018 {
@@ -3445,8 +3046,7 @@ change_speed(struct e100_serial *info)
3445 3046
3446#ifndef CONFIG_SVINTO_SIM 3047#ifndef CONFIG_SVINTO_SIM
3447 /* start with default settings and then fill in changes */ 3048 /* start with default settings and then fill in changes */
3448 save_flags(flags); 3049 local_irq_save(flags);
3449 cli();
3450 /* 8 bit, no/even parity */ 3050 /* 8 bit, no/even parity */
3451 info->rx_ctrl &= ~(IO_MASK(R_SERIAL0_REC_CTRL, rec_bitnr) | 3051 info->rx_ctrl &= ~(IO_MASK(R_SERIAL0_REC_CTRL, rec_bitnr) |
3452 IO_MASK(R_SERIAL0_REC_CTRL, rec_par_en) | 3052 IO_MASK(R_SERIAL0_REC_CTRL, rec_par_en) |
@@ -3510,7 +3110,7 @@ change_speed(struct e100_serial *info)
3510 } 3110 }
3511 3111
3512 *((unsigned long *)&info->port[REG_XOFF]) = xoff; 3112 *((unsigned long *)&info->port[REG_XOFF]) = xoff;
3513 restore_flags(flags); 3113 local_irq_restore(flags);
3514#endif /* !CONFIG_SVINTO_SIM */ 3114#endif /* !CONFIG_SVINTO_SIM */
3515 3115
3516 update_char_time(info); 3116 update_char_time(info);
@@ -3538,13 +3138,12 @@ rs_flush_chars(struct tty_struct *tty)
3538 3138
3539 /* this protection might not exactly be necessary here */ 3139 /* this protection might not exactly be necessary here */
3540 3140
3541 save_flags(flags); 3141 local_irq_save(flags);
3542 cli();
3543 start_transmit(info); 3142 start_transmit(info);
3544 restore_flags(flags); 3143 local_irq_restore(flags);
3545} 3144}
3546 3145
3547static int rs_raw_write(struct tty_struct * tty, int from_user, 3146static int rs_raw_write(struct tty_struct *tty,
3548 const unsigned char *buf, int count) 3147 const unsigned char *buf, int count)
3549{ 3148{
3550 int c, ret = 0; 3149 int c, ret = 0;
@@ -3567,53 +3166,19 @@ static int rs_raw_write(struct tty_struct * tty, int from_user,
3567 SIMCOUT(buf, count); 3166 SIMCOUT(buf, count);
3568 return count; 3167 return count;
3569#endif 3168#endif
3570 save_flags(flags); 3169 local_save_flags(flags);
3571 DFLOW(DEBUG_LOG(info->line, "write count %i ", count)); 3170 DFLOW(DEBUG_LOG(info->line, "write count %i ", count));
3572 DFLOW(DEBUG_LOG(info->line, "ldisc %i\n", tty->ldisc.chars_in_buffer(tty))); 3171 DFLOW(DEBUG_LOG(info->line, "ldisc %i\n", tty->ldisc.chars_in_buffer(tty)));
3573 3172
3574 3173
3575 /* the cli/restore_flags pairs below are needed because the 3174 /* The local_irq_disable/restore_flags pairs below are needed
3576 * DMA interrupt handler moves the info->xmit values. the memcpy 3175 * because the DMA interrupt handler moves the info->xmit values.
3577 * needs to be in the critical region unfortunately, because we 3176 * the memcpy needs to be in the critical region unfortunately,
3578 * need to read xmit values, memcpy, write xmit values in one 3177 * because we need to read xmit values, memcpy, write xmit values
3579 * atomic operation... this could perhaps be avoided by more clever 3178 * in one atomic operation... this could perhaps be avoided by
3580 * design. 3179 * more clever design.
3581 */ 3180 */
3582 if (from_user) { 3181 local_irq_disable();
3583 mutex_lock(&tmp_buf_mutex);
3584 while (1) {
3585 int c1;
3586 c = CIRC_SPACE_TO_END(info->xmit.head,
3587 info->xmit.tail,
3588 SERIAL_XMIT_SIZE);
3589 if (count < c)
3590 c = count;
3591 if (c <= 0)
3592 break;
3593
3594 c -= copy_from_user(tmp_buf, buf, c);
3595 if (!c) {
3596 if (!ret)
3597 ret = -EFAULT;
3598 break;
3599 }
3600 cli();
3601 c1 = CIRC_SPACE_TO_END(info->xmit.head,
3602 info->xmit.tail,
3603 SERIAL_XMIT_SIZE);
3604 if (c1 < c)
3605 c = c1;
3606 memcpy(info->xmit.buf + info->xmit.head, tmp_buf, c);
3607 info->xmit.head = ((info->xmit.head + c) &
3608 (SERIAL_XMIT_SIZE-1));
3609 restore_flags(flags);
3610 buf += c;
3611 count -= c;
3612 ret += c;
3613 }
3614 mutex_unlock(&tmp_buf_mutex);
3615 } else {
3616 cli();
3617 while (count) { 3182 while (count) {
3618 c = CIRC_SPACE_TO_END(info->xmit.head, 3183 c = CIRC_SPACE_TO_END(info->xmit.head,
3619 info->xmit.tail, 3184 info->xmit.tail,
@@ -3631,8 +3196,7 @@ static int rs_raw_write(struct tty_struct * tty, int from_user,
3631 count -= c; 3196 count -= c;
3632 ret += c; 3197 ret += c;
3633 } 3198 }
3634 restore_flags(flags); 3199 local_irq_restore(flags);
3635 }
3636 3200
3637 /* enable transmitter if not running, unless the tty is stopped 3201 /* enable transmitter if not running, unless the tty is stopped
3638 * this does not need IRQ protection since if tr_running == 0 3202 * this does not need IRQ protection since if tr_running == 0
@@ -3651,7 +3215,7 @@ static int rs_raw_write(struct tty_struct * tty, int from_user,
3651} /* raw_raw_write() */ 3215} /* raw_raw_write() */
3652 3216
3653static int 3217static int
3654rs_write(struct tty_struct * tty, int from_user, 3218rs_write(struct tty_struct *tty,
3655 const unsigned char *buf, int count) 3219 const unsigned char *buf, int count)
3656{ 3220{
3657#if defined(CONFIG_ETRAX_RS485) 3221#if defined(CONFIG_ETRAX_RS485)
@@ -3678,7 +3242,7 @@ rs_write(struct tty_struct * tty, int from_user,
3678 } 3242 }
3679#endif /* CONFIG_ETRAX_RS485 */ 3243#endif /* CONFIG_ETRAX_RS485 */
3680 3244
3681 count = rs_raw_write(tty, from_user, buf, count); 3245 count = rs_raw_write(tty, buf, count);
3682 3246
3683#if defined(CONFIG_ETRAX_RS485) 3247#if defined(CONFIG_ETRAX_RS485)
3684 if (info->rs485.enabled) 3248 if (info->rs485.enabled)
@@ -3746,10 +3310,9 @@ rs_flush_buffer(struct tty_struct *tty)
3746 struct e100_serial *info = (struct e100_serial *)tty->driver_data; 3310 struct e100_serial *info = (struct e100_serial *)tty->driver_data;
3747 unsigned long flags; 3311 unsigned long flags;
3748 3312
3749 save_flags(flags); 3313 local_irq_save(flags);
3750 cli();
3751 info->xmit.head = info->xmit.tail = 0; 3314 info->xmit.head = info->xmit.tail = 0;
3752 restore_flags(flags); 3315 local_irq_restore(flags);
3753 3316
3754 tty_wakeup(tty); 3317 tty_wakeup(tty);
3755} 3318}
@@ -3767,7 +3330,7 @@ static void rs_send_xchar(struct tty_struct *tty, char ch)
3767{ 3330{
3768 struct e100_serial *info = (struct e100_serial *)tty->driver_data; 3331 struct e100_serial *info = (struct e100_serial *)tty->driver_data;
3769 unsigned long flags; 3332 unsigned long flags;
3770 save_flags(flags); cli(); 3333 local_irq_save(flags);
3771 if (info->uses_dma_out) { 3334 if (info->uses_dma_out) {
3772 /* Put the DMA on hold and disable the channel */ 3335 /* Put the DMA on hold and disable the channel */
3773 *info->ocmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, hold); 3336 *info->ocmdadr = IO_STATE(R_DMA_CH6_CMD, cmd, hold);
@@ -3784,7 +3347,7 @@ static void rs_send_xchar(struct tty_struct *tty, char ch)
3784 DFLOW(DEBUG_LOG(info->line, "rs_send_xchar 0x%02X\n", ch)); 3347 DFLOW(DEBUG_LOG(info->line, "rs_send_xchar 0x%02X\n", ch));
3785 info->x_char = ch; 3348 info->x_char = ch;
3786 e100_enable_serial_tx_ready_irq(info); 3349 e100_enable_serial_tx_ready_irq(info);
3787 restore_flags(flags); 3350 local_irq_restore(flags);
3788} 3351}
3789 3352
3790/* 3353/*
@@ -3996,21 +3559,61 @@ char *get_control_state_str(int MLines, char *s)
3996} 3559}
3997#endif 3560#endif
3998 3561
3562static void
3563rs_break(struct tty_struct *tty, int break_state)
3564{
3565 struct e100_serial *info = (struct e100_serial *)tty->driver_data;
3566 unsigned long flags;
3567
3568 if (!info->port)
3569 return;
3570
3571 local_irq_save(flags);
3572 if (break_state == -1) {
3573 /* Go to manual mode and set the txd pin to 0 */
3574 /* Clear bit 7 (txd) and 6 (tr_enable) */
3575 info->tx_ctrl &= 0x3F;
3576 } else {
3577 /* Set bit 7 (txd) and 6 (tr_enable) */
3578 info->tx_ctrl |= (0x80 | 0x40);
3579 }
3580 info->port[REG_TR_CTRL] = info->tx_ctrl;
3581 local_irq_restore(flags);
3582}
3583
3999static int 3584static int
4000get_modem_info(struct e100_serial * info, unsigned int *value) 3585rs_tiocmset(struct tty_struct *tty, struct file *file,
3586 unsigned int set, unsigned int clear)
4001{ 3587{
4002 unsigned int result; 3588 struct e100_serial *info = (struct e100_serial *)tty->driver_data;
4003 /* Polarity isn't verified */
4004#if 0 /*def SERIAL_DEBUG_IO */
4005 3589
4006 printk("get_modem_info: RTS: %i DTR: %i CD: %i RI: %i DSR: %i CTS: %i\n", 3590 if (clear & TIOCM_RTS)
4007 E100_RTS_GET(info), 3591 e100_rts(info, 0);
4008 E100_DTR_GET(info), 3592 if (clear & TIOCM_DTR)
4009 E100_CD_GET(info), 3593 e100_dtr(info, 0);
4010 E100_RI_GET(info), 3594 /* Handle FEMALE behaviour */
4011 E100_DSR_GET(info), 3595 if (clear & TIOCM_RI)
4012 E100_CTS_GET(info)); 3596 e100_ri_out(info, 0);
4013#endif 3597 if (clear & TIOCM_CD)
3598 e100_cd_out(info, 0);
3599
3600 if (set & TIOCM_RTS)
3601 e100_rts(info, 1);
3602 if (set & TIOCM_DTR)
3603 e100_dtr(info, 1);
3604 /* Handle FEMALE behaviour */
3605 if (set & TIOCM_RI)
3606 e100_ri_out(info, 1);
3607 if (set & TIOCM_CD)
3608 e100_cd_out(info, 1);
3609 return 0;
3610}
3611
3612static int
3613rs_tiocmget(struct tty_struct *tty, struct file *file)
3614{
3615 struct e100_serial *info = (struct e100_serial *)tty->driver_data;
3616 unsigned int result;
4014 3617
4015 result = 3618 result =
4016 (!E100_RTS_GET(info) ? TIOCM_RTS : 0) 3619 (!E100_RTS_GET(info) ? TIOCM_RTS : 0)
@@ -4021,95 +3624,20 @@ get_modem_info(struct e100_serial * info, unsigned int *value)
4021 | (!E100_CTS_GET(info) ? TIOCM_CTS : 0); 3624 | (!E100_CTS_GET(info) ? TIOCM_CTS : 0);
4022 3625
4023#ifdef SERIAL_DEBUG_IO 3626#ifdef SERIAL_DEBUG_IO
4024 printk("e100ser: modem state: %i 0x%08X\n", result, result); 3627 printk(KERN_DEBUG "ser%i: modem state: %i 0x%08X\n",
3628 info->line, result, result);
4025 { 3629 {
4026 char s[100]; 3630 char s[100];
4027 3631
4028 get_control_state_str(result, s); 3632 get_control_state_str(result, s);
4029 printk("state: %s\n", s); 3633 printk(KERN_DEBUG "state: %s\n", s);
4030 } 3634 }
4031#endif 3635#endif
4032 if (copy_to_user(value, &result, sizeof(int))) 3636 return result;
4033 return -EFAULT;
4034 return 0;
4035}
4036 3637
4037
4038static int
4039set_modem_info(struct e100_serial * info, unsigned int cmd,
4040 unsigned int *value)
4041{
4042 unsigned int arg;
4043
4044 if (copy_from_user(&arg, value, sizeof(int)))
4045 return -EFAULT;
4046
4047 switch (cmd) {
4048 case TIOCMBIS:
4049 if (arg & TIOCM_RTS) {
4050 e100_rts(info, 1);
4051 }
4052 if (arg & TIOCM_DTR) {
4053 e100_dtr(info, 1);
4054 }
4055 /* Handle FEMALE behaviour */
4056 if (arg & TIOCM_RI) {
4057 e100_ri_out(info, 1);
4058 }
4059 if (arg & TIOCM_CD) {
4060 e100_cd_out(info, 1);
4061 }
4062 break;
4063 case TIOCMBIC:
4064 if (arg & TIOCM_RTS) {
4065 e100_rts(info, 0);
4066 }
4067 if (arg & TIOCM_DTR) {
4068 e100_dtr(info, 0);
4069 }
4070 /* Handle FEMALE behaviour */
4071 if (arg & TIOCM_RI) {
4072 e100_ri_out(info, 0);
4073 }
4074 if (arg & TIOCM_CD) {
4075 e100_cd_out(info, 0);
4076 }
4077 break;
4078 case TIOCMSET:
4079 e100_rts(info, arg & TIOCM_RTS);
4080 e100_dtr(info, arg & TIOCM_DTR);
4081 /* Handle FEMALE behaviour */
4082 e100_ri_out(info, arg & TIOCM_RI);
4083 e100_cd_out(info, arg & TIOCM_CD);
4084 break;
4085 default:
4086 return -EINVAL;
4087 }
4088 return 0;
4089} 3638}
4090 3639
4091 3640
4092static void
4093rs_break(struct tty_struct *tty, int break_state)
4094{
4095 struct e100_serial * info = (struct e100_serial *)tty->driver_data;
4096 unsigned long flags;
4097
4098 if (!info->port)
4099 return;
4100
4101 save_flags(flags);
4102 cli();
4103 if (break_state == -1) {
4104 /* Go to manual mode and set the txd pin to 0 */
4105 info->tx_ctrl &= 0x3F; /* Clear bit 7 (txd) and 6 (tr_enable) */
4106 } else {
4107 info->tx_ctrl |= (0x80 | 0x40); /* Set bit 7 (txd) and 6 (tr_enable) */
4108 }
4109 info->port[REG_TR_CTRL] = info->tx_ctrl;
4110 restore_flags(flags);
4111}
4112
4113static int 3641static int
4114rs_ioctl(struct tty_struct *tty, struct file * file, 3642rs_ioctl(struct tty_struct *tty, struct file * file,
4115 unsigned int cmd, unsigned long arg) 3643 unsigned int cmd, unsigned long arg)
@@ -4124,49 +3652,45 @@ rs_ioctl(struct tty_struct *tty, struct file * file,
4124 } 3652 }
4125 3653
4126 switch (cmd) { 3654 switch (cmd) {
4127 case TIOCMGET: 3655 case TIOCGSERIAL:
4128 return get_modem_info(info, (unsigned int *) arg); 3656 return get_serial_info(info,
4129 case TIOCMBIS: 3657 (struct serial_struct *) arg);
4130 case TIOCMBIC: 3658 case TIOCSSERIAL:
4131 case TIOCMSET: 3659 return set_serial_info(info,
4132 return set_modem_info(info, cmd, (unsigned int *) arg); 3660 (struct serial_struct *) arg);
4133 case TIOCGSERIAL: 3661 case TIOCSERGETLSR: /* Get line status register */
4134 return get_serial_info(info, 3662 return get_lsr_info(info, (unsigned int *) arg);
4135 (struct serial_struct *) arg); 3663
4136 case TIOCSSERIAL: 3664 case TIOCSERGSTRUCT:
4137 return set_serial_info(info, 3665 if (copy_to_user((struct e100_serial *) arg,
4138 (struct serial_struct *) arg); 3666 info, sizeof(struct e100_serial)))
4139 case TIOCSERGETLSR: /* Get line status register */ 3667 return -EFAULT;
4140 return get_lsr_info(info, (unsigned int *) arg); 3668 return 0;
4141
4142 case TIOCSERGSTRUCT:
4143 if (copy_to_user((struct e100_serial *) arg,
4144 info, sizeof(struct e100_serial)))
4145 return -EFAULT;
4146 return 0;
4147 3669
4148#if defined(CONFIG_ETRAX_RS485) 3670#if defined(CONFIG_ETRAX_RS485)
4149 case TIOCSERSETRS485: 3671 case TIOCSERSETRS485:
4150 { 3672 {
4151 struct rs485_control rs485ctrl; 3673 struct rs485_control rs485ctrl;
4152 if (copy_from_user(&rs485ctrl, (struct rs485_control*)arg, sizeof(rs485ctrl))) 3674 if (copy_from_user(&rs485ctrl, (struct rs485_control *)arg,
4153 return -EFAULT; 3675 sizeof(rs485ctrl)))
3676 return -EFAULT;
4154 3677
4155 return e100_enable_rs485(tty, &rs485ctrl); 3678 return e100_enable_rs485(tty, &rs485ctrl);
4156 } 3679 }
4157 3680
4158 case TIOCSERWRRS485: 3681 case TIOCSERWRRS485:
4159 { 3682 {
4160 struct rs485_write rs485wr; 3683 struct rs485_write rs485wr;
4161 if (copy_from_user(&rs485wr, (struct rs485_write*)arg, sizeof(rs485wr))) 3684 if (copy_from_user(&rs485wr, (struct rs485_write *)arg,
4162 return -EFAULT; 3685 sizeof(rs485wr)))
3686 return -EFAULT;
4163 3687
4164 return e100_write_rs485(tty, 1, rs485wr.outc, rs485wr.outc_size); 3688 return e100_write_rs485(tty, rs485wr.outc, rs485wr.outc_size);
4165 } 3689 }
4166#endif 3690#endif
4167 3691
4168 default: 3692 default:
4169 return -ENOIOCTLCMD; 3693 return -ENOIOCTLCMD;
4170 } 3694 }
4171 return 0; 3695 return 0;
4172} 3696}
@@ -4191,46 +3715,6 @@ rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4191 3715
4192} 3716}
4193 3717
4194/* In debugport.c - register a console write function that uses the normal
4195 * serial driver
4196 */
4197typedef int (*debugport_write_function)(int i, const char *buf, unsigned int len);
4198
4199extern debugport_write_function debug_write_function;
4200
4201static int rs_debug_write_function(int i, const char *buf, unsigned int len)
4202{
4203 int cnt;
4204 int written = 0;
4205 struct tty_struct *tty;
4206 static int recurse_cnt = 0;
4207
4208 tty = rs_table[i].tty;
4209 if (tty) {
4210 unsigned long flags;
4211 if (recurse_cnt > 5) /* We skip this debug output */
4212 return 1;
4213
4214 local_irq_save(flags);
4215 recurse_cnt++;
4216 local_irq_restore(flags);
4217 do {
4218 cnt = rs_write(tty, 0, buf + written, len);
4219 if (cnt >= 0) {
4220 written += cnt;
4221 buf += cnt;
4222 len -= cnt;
4223 } else
4224 len = cnt;
4225 } while(len > 0);
4226 local_irq_save(flags);
4227 recurse_cnt--;
4228 local_irq_restore(flags);
4229 return 1;
4230 }
4231 return 0;
4232}
4233
4234/* 3718/*
4235 * ------------------------------------------------------------ 3719 * ------------------------------------------------------------
4236 * rs_close() 3720 * rs_close()
@@ -4252,11 +3736,10 @@ rs_close(struct tty_struct *tty, struct file * filp)
4252 3736
4253 /* interrupts are disabled for this entire function */ 3737 /* interrupts are disabled for this entire function */
4254 3738
4255 save_flags(flags); 3739 local_irq_save(flags);
4256 cli();
4257 3740
4258 if (tty_hung_up_p(filp)) { 3741 if (tty_hung_up_p(filp)) {
4259 restore_flags(flags); 3742 local_irq_restore(flags);
4260 return; 3743 return;
4261 } 3744 }
4262 3745
@@ -4283,7 +3766,7 @@ rs_close(struct tty_struct *tty, struct file * filp)
4283 info->count = 0; 3766 info->count = 0;
4284 } 3767 }
4285 if (info->count) { 3768 if (info->count) {
4286 restore_flags(flags); 3769 local_irq_restore(flags);
4287 return; 3770 return;
4288 } 3771 }
4289 info->flags |= ASYNC_CLOSING; 3772 info->flags |= ASYNC_CLOSING;
@@ -4337,7 +3820,7 @@ rs_close(struct tty_struct *tty, struct file * filp)
4337 } 3820 }
4338 info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); 3821 info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
4339 wake_up_interruptible(&info->close_wait); 3822 wake_up_interruptible(&info->close_wait);
4340 restore_flags(flags); 3823 local_irq_restore(flags);
4341 3824
4342 /* port closed */ 3825 /* port closed */
4343 3826
@@ -4359,6 +3842,28 @@ rs_close(struct tty_struct *tty, struct file * filp)
4359#endif 3842#endif
4360 } 3843 }
4361#endif 3844#endif
3845
3846 /*
3847 * Release any allocated DMA irq's.
3848 */
3849 if (info->dma_in_enabled) {
3850 free_irq(info->dma_in_irq_nbr, info);
3851 cris_free_dma(info->dma_in_nbr, info->dma_in_irq_description);
3852 info->uses_dma_in = 0;
3853#ifdef SERIAL_DEBUG_OPEN
3854 printk(KERN_DEBUG "DMA irq '%s' freed\n",
3855 info->dma_in_irq_description);
3856#endif
3857 }
3858 if (info->dma_out_enabled) {
3859 free_irq(info->dma_out_irq_nbr, info);
3860 cris_free_dma(info->dma_out_nbr, info->dma_out_irq_description);
3861 info->uses_dma_out = 0;
3862#ifdef SERIAL_DEBUG_OPEN
3863 printk(KERN_DEBUG "DMA irq '%s' freed\n",
3864 info->dma_out_irq_description);
3865#endif
3866 }
4362} 3867}
4363 3868
4364/* 3869/*
@@ -4433,8 +3938,8 @@ block_til_ready(struct tty_struct *tty, struct file * filp,
4433 */ 3938 */
4434 if (tty_hung_up_p(filp) || 3939 if (tty_hung_up_p(filp) ||
4435 (info->flags & ASYNC_CLOSING)) { 3940 (info->flags & ASYNC_CLOSING)) {
4436 if (info->flags & ASYNC_CLOSING) 3941 wait_event_interruptible(info->close_wait,
4437 interruptible_sleep_on(&info->close_wait); 3942 !(info->flags & ASYNC_CLOSING));
4438#ifdef SERIAL_DO_RESTART 3943#ifdef SERIAL_DO_RESTART
4439 if (info->flags & ASYNC_HUP_NOTIFY) 3944 if (info->flags & ASYNC_HUP_NOTIFY)
4440 return -EAGAIN; 3945 return -EAGAIN;
@@ -4472,21 +3977,19 @@ block_til_ready(struct tty_struct *tty, struct file * filp,
4472 printk("block_til_ready before block: ttyS%d, count = %d\n", 3977 printk("block_til_ready before block: ttyS%d, count = %d\n",
4473 info->line, info->count); 3978 info->line, info->count);
4474#endif 3979#endif
4475 save_flags(flags); 3980 local_irq_save(flags);
4476 cli();
4477 if (!tty_hung_up_p(filp)) { 3981 if (!tty_hung_up_p(filp)) {
4478 extra_count++; 3982 extra_count++;
4479 info->count--; 3983 info->count--;
4480 } 3984 }
4481 restore_flags(flags); 3985 local_irq_restore(flags);
4482 info->blocked_open++; 3986 info->blocked_open++;
4483 while (1) { 3987 while (1) {
4484 save_flags(flags); 3988 local_irq_save(flags);
4485 cli();
4486 /* assert RTS and DTR */ 3989 /* assert RTS and DTR */
4487 e100_rts(info, 1); 3990 e100_rts(info, 1);
4488 e100_dtr(info, 1); 3991 e100_dtr(info, 1);
4489 restore_flags(flags); 3992 local_irq_restore(flags);
4490 set_current_state(TASK_INTERRUPTIBLE); 3993 set_current_state(TASK_INTERRUPTIBLE);
4491 if (tty_hung_up_p(filp) || 3994 if (tty_hung_up_p(filp) ||
4492 !(info->flags & ASYNC_INITIALIZED)) { 3995 !(info->flags & ASYNC_INITIALIZED)) {
@@ -4528,6 +4031,19 @@ block_til_ready(struct tty_struct *tty, struct file * filp,
4528 return 0; 4031 return 0;
4529} 4032}
4530 4033
4034static void
4035deinit_port(struct e100_serial *info)
4036{
4037 if (info->dma_out_enabled) {
4038 cris_free_dma(info->dma_out_nbr, info->dma_out_irq_description);
4039 free_irq(info->dma_out_irq_nbr, info);
4040 }
4041 if (info->dma_in_enabled) {
4042 cris_free_dma(info->dma_in_nbr, info->dma_in_irq_description);
4043 free_irq(info->dma_in_irq_nbr, info);
4044 }
4045}
4046
4531/* 4047/*
4532 * This routine is called whenever a serial port is opened. 4048 * This routine is called whenever a serial port is opened.
4533 * It performs the serial-specific initialization for the tty structure. 4049 * It performs the serial-specific initialization for the tty structure.
@@ -4538,9 +4054,9 @@ rs_open(struct tty_struct *tty, struct file * filp)
4538 struct e100_serial *info; 4054 struct e100_serial *info;
4539 int retval, line; 4055 int retval, line;
4540 unsigned long page; 4056 unsigned long page;
4057 int allocated_resources = 0;
4541 4058
4542 /* find which port we want to open */ 4059 /* find which port we want to open */
4543
4544 line = tty->index; 4060 line = tty->index;
4545 4061
4546 if (line < 0 || line >= NR_PORTS) 4062 if (line < 0 || line >= NR_PORTS)
@@ -4580,8 +4096,8 @@ rs_open(struct tty_struct *tty, struct file * filp)
4580 */ 4096 */
4581 if (tty_hung_up_p(filp) || 4097 if (tty_hung_up_p(filp) ||
4582 (info->flags & ASYNC_CLOSING)) { 4098 (info->flags & ASYNC_CLOSING)) {
4583 if (info->flags & ASYNC_CLOSING) 4099 wait_event_interruptible(info->close_wait,
4584 interruptible_sleep_on(&info->close_wait); 4100 !(info->flags & ASYNC_CLOSING));
4585#ifdef SERIAL_DO_RESTART 4101#ifdef SERIAL_DO_RESTART
4586 return ((info->flags & ASYNC_HUP_NOTIFY) ? 4102 return ((info->flags & ASYNC_HUP_NOTIFY) ?
4587 -EAGAIN : -ERESTARTSYS); 4103 -EAGAIN : -ERESTARTSYS);
@@ -4591,12 +4107,85 @@ rs_open(struct tty_struct *tty, struct file * filp)
4591 } 4107 }
4592 4108
4593 /* 4109 /*
4110 * If DMA is enabled try to allocate the irq's.
4111 */
4112 if (info->count == 1) {
4113 allocated_resources = 1;
4114 if (info->dma_in_enabled) {
4115 if (request_irq(info->dma_in_irq_nbr,
4116 rec_interrupt,
4117 info->dma_in_irq_flags,
4118 info->dma_in_irq_description,
4119 info)) {
4120 printk(KERN_WARNING "DMA irq '%s' busy; "
4121 "falling back to non-DMA mode\n",
4122 info->dma_in_irq_description);
4123 /* Make sure we never try to use DMA in */
4124 /* for the port again. */
4125 info->dma_in_enabled = 0;
4126 } else if (cris_request_dma(info->dma_in_nbr,
4127 info->dma_in_irq_description,
4128 DMA_VERBOSE_ON_ERROR,
4129 info->dma_owner)) {
4130 free_irq(info->dma_in_irq_nbr, info);
4131 printk(KERN_WARNING "DMA '%s' busy; "
4132 "falling back to non-DMA mode\n",
4133 info->dma_in_irq_description);
4134 /* Make sure we never try to use DMA in */
4135 /* for the port again. */
4136 info->dma_in_enabled = 0;
4137 }
4138#ifdef SERIAL_DEBUG_OPEN
4139 else
4140 printk(KERN_DEBUG "DMA irq '%s' allocated\n",
4141 info->dma_in_irq_description);
4142#endif
4143 }
4144 if (info->dma_out_enabled) {
4145 if (request_irq(info->dma_out_irq_nbr,
4146 tr_interrupt,
4147 info->dma_out_irq_flags,
4148 info->dma_out_irq_description,
4149 info)) {
4150 printk(KERN_WARNING "DMA irq '%s' busy; "
4151 "falling back to non-DMA mode\n",
4152 info->dma_out_irq_description);
4153 /* Make sure we never try to use DMA out */
4154 /* for the port again. */
4155 info->dma_out_enabled = 0;
4156 } else if (cris_request_dma(info->dma_out_nbr,
4157 info->dma_out_irq_description,
4158 DMA_VERBOSE_ON_ERROR,
4159 info->dma_owner)) {
4160 free_irq(info->dma_out_irq_nbr, info);
4161 printk(KERN_WARNING "DMA '%s' busy; "
4162 "falling back to non-DMA mode\n",
4163 info->dma_out_irq_description);
4164 /* Make sure we never try to use DMA out */
4165 /* for the port again. */
4166 info->dma_out_enabled = 0;
4167 }
4168#ifdef SERIAL_DEBUG_OPEN
4169 else
4170 printk(KERN_DEBUG "DMA irq '%s' allocated\n",
4171 info->dma_out_irq_description);
4172#endif
4173 }
4174 }
4175
4176 /*
4594 * Start up the serial port 4177 * Start up the serial port
4595 */ 4178 */
4596 4179
4597 retval = startup(info); 4180 retval = startup(info);
4598 if (retval) 4181 if (retval) {
4182 if (allocated_resources)
4183 deinit_port(info);
4184
4185 /* FIXME Decrease count info->count here too? */
4599 return retval; 4186 return retval;
4187 }
4188
4600 4189
4601 retval = block_til_ready(tty, filp, info); 4190 retval = block_til_ready(tty, filp, info);
4602 if (retval) { 4191 if (retval) {
@@ -4604,6 +4193,9 @@ rs_open(struct tty_struct *tty, struct file * filp)
4604 printk("rs_open returning after block_til_ready with %d\n", 4193 printk("rs_open returning after block_til_ready with %d\n",
4605 retval); 4194 retval);
4606#endif 4195#endif
4196 if (allocated_resources)
4197 deinit_port(info);
4198
4607 return retval; 4199 return retval;
4608 } 4200 }
4609 4201
@@ -4793,6 +4385,8 @@ static const struct tty_operations rs_ops = {
4793 .send_xchar = rs_send_xchar, 4385 .send_xchar = rs_send_xchar,
4794 .wait_until_sent = rs_wait_until_sent, 4386 .wait_until_sent = rs_wait_until_sent,
4795 .read_proc = rs_read_proc, 4387 .read_proc = rs_read_proc,
4388 .tiocmget = rs_tiocmget,
4389 .tiocmset = rs_tiocmset
4796}; 4390};
4797 4391
4798static int __init 4392static int __init
@@ -4810,9 +4404,27 @@ rs_init(void)
4810 /* Setup the timed flush handler system */ 4404 /* Setup the timed flush handler system */
4811 4405
4812#if !defined(CONFIG_ETRAX_SERIAL_FAST_TIMER) 4406#if !defined(CONFIG_ETRAX_SERIAL_FAST_TIMER)
4813 init_timer(&flush_timer); 4407 setup_timer(&flush_timer, timed_flush_handler, 0);
4814 flush_timer.function = timed_flush_handler; 4408 mod_timer(&flush_timer, jiffies + 5);
4815 mod_timer(&flush_timer, jiffies + CONFIG_ETRAX_SERIAL_RX_TIMEOUT_TICKS); 4409#endif
4410
4411#if defined(CONFIG_ETRAX_RS485)
4412#if defined(CONFIG_ETRAX_RS485_ON_PA)
4413 if (cris_io_interface_allocate_pins(if_ser0, 'a', rs485_pa_bit,
4414 rs485_pa_bit)) {
4415 printk(KERN_CRIT "ETRAX100LX serial: Could not allocate "
4416 "RS485 pin\n");
4417 return -EBUSY;
4418 }
4419#endif
4420#if defined(CONFIG_ETRAX_RS485_ON_PORT_G)
4421 if (cris_io_interface_allocate_pins(if_ser0, 'g', rs485_pa_bit,
4422 rs485_port_g_bit)) {
4423 printk(KERN_CRIT "ETRAX100LX serial: Could not allocate "
4424 "RS485 pin\n");
4425 return -EBUSY;
4426 }
4427#endif
4816#endif 4428#endif
4817 4429
4818 /* Initialize the tty_driver structure */ 4430 /* Initialize the tty_driver structure */
@@ -4839,6 +4451,16 @@ rs_init(void)
4839 /* do some initializing for the separate ports */ 4451 /* do some initializing for the separate ports */
4840 4452
4841 for (i = 0, info = rs_table; i < NR_PORTS; i++,info++) { 4453 for (i = 0, info = rs_table; i < NR_PORTS; i++,info++) {
4454 if (info->enabled) {
4455 if (cris_request_io_interface(info->io_if,
4456 info->io_if_description)) {
4457 printk(KERN_CRIT "ETRAX100LX async serial: "
4458 "Could not allocate IO pins for "
4459 "%s, port %d\n",
4460 info->io_if_description, i);
4461 info->enabled = 0;
4462 }
4463 }
4842 info->uses_dma_in = 0; 4464 info->uses_dma_in = 0;
4843 info->uses_dma_out = 0; 4465 info->uses_dma_out = 0;
4844 info->line = i; 4466 info->line = i;
@@ -4872,7 +4494,7 @@ rs_init(void)
4872 info->rs485.delay_rts_before_send = 0; 4494 info->rs485.delay_rts_before_send = 0;
4873 info->rs485.enabled = 0; 4495 info->rs485.enabled = 0;
4874#endif 4496#endif
4875 INIT_WORK(&info->work, do_softint, info); 4497 INIT_WORK(&info->work, do_softint);
4876 4498
4877 if (info->enabled) { 4499 if (info->enabled) {
4878 printk(KERN_INFO "%s%d at 0x%x is a builtin UART with DMA\n", 4500 printk(KERN_INFO "%s%d at 0x%x is a builtin UART with DMA\n",
@@ -4890,64 +4512,17 @@ rs_init(void)
4890#endif 4512#endif
4891 4513
4892#ifndef CONFIG_SVINTO_SIM 4514#ifndef CONFIG_SVINTO_SIM
4515#ifndef CONFIG_ETRAX_KGDB
4893 /* Not needed in simulator. May only complicate stuff. */ 4516 /* Not needed in simulator. May only complicate stuff. */
4894 /* hook the irq's for DMA channel 6 and 7, serial output and input, and some more... */ 4517 /* hook the irq's for DMA channel 6 and 7, serial output and input, and some more... */
4895 4518
4896 if (request_irq(SERIAL_IRQ_NBR, ser_interrupt, IRQF_SHARED | IRQF_DISABLED, "serial ", NULL)) 4519 if (request_irq(SERIAL_IRQ_NBR, ser_interrupt,
4897 panic("irq8"); 4520 IRQF_SHARED | IRQF_DISABLED, "serial ", driver))
4898 4521 panic("%s: Failed to request irq8", __FUNCTION__);
4899#ifdef CONFIG_ETRAX_SERIAL_PORT0
4900#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA6_OUT
4901 if (request_irq(SER0_DMA_TX_IRQ_NBR, tr_interrupt, IRQF_DISABLED, "serial 0 dma tr", NULL))
4902 panic("irq22");
4903#endif
4904#ifdef CONFIG_ETRAX_SERIAL_PORT0_DMA7_IN
4905 if (request_irq(SER0_DMA_RX_IRQ_NBR, rec_interrupt, IRQF_DISABLED, "serial 0 dma rec", NULL))
4906 panic("irq23");
4907#endif
4908#endif
4909
4910#ifdef CONFIG_ETRAX_SERIAL_PORT1
4911#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA8_OUT
4912 if (request_irq(SER1_DMA_TX_IRQ_NBR, tr_interrupt, IRQF_DISABLED, "serial 1 dma tr", NULL))
4913 panic("irq24");
4914#endif
4915#ifdef CONFIG_ETRAX_SERIAL_PORT1_DMA9_IN
4916 if (request_irq(SER1_DMA_RX_IRQ_NBR, rec_interrupt, IRQF_DISABLED, "serial 1 dma rec", NULL))
4917 panic("irq25");
4918#endif
4919#endif
4920#ifdef CONFIG_ETRAX_SERIAL_PORT2
4921 /* DMA Shared with par0 (and SCSI0 and ATA) */
4922#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA2_OUT
4923 if (request_irq(SER2_DMA_TX_IRQ_NBR, tr_interrupt, IRQF_SHARED | IRQF_DISABLED, "serial 2 dma tr", NULL))
4924 panic("irq18");
4925#endif
4926#ifdef CONFIG_ETRAX_SERIAL_PORT2_DMA3_IN
4927 if (request_irq(SER2_DMA_RX_IRQ_NBR, rec_interrupt, IRQF_SHARED | IRQF_DISABLED, "serial 2 dma rec", NULL))
4928 panic("irq19");
4929#endif
4930#endif
4931#ifdef CONFIG_ETRAX_SERIAL_PORT3
4932 /* DMA Shared with par1 (and SCSI1 and Extern DMA 0) */
4933#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA4_OUT
4934 if (request_irq(SER3_DMA_TX_IRQ_NBR, tr_interrupt, IRQF_SHARED | IRQF_DISABLED, "serial 3 dma tr", NULL))
4935 panic("irq20");
4936#endif
4937#ifdef CONFIG_ETRAX_SERIAL_PORT3_DMA5_IN
4938 if (request_irq(SER3_DMA_RX_IRQ_NBR, rec_interrupt, IRQF_SHARED | IRQF_DISABLED, "serial 3 dma rec", NULL))
4939 panic("irq21");
4940#endif
4941#endif
4942 4522
4943#ifdef CONFIG_ETRAX_SERIAL_FLUSH_DMA_FAST
4944 if (request_irq(TIMER1_IRQ_NBR, timeout_interrupt, IRQF_SHARED | IRQF_DISABLED,
4945 "fast serial dma timeout", NULL)) {
4946 printk(KERN_CRIT "err: timer1 irq\n");
4947 }
4948#endif 4523#endif
4949#endif /* CONFIG_SVINTO_SIM */ 4524#endif /* CONFIG_SVINTO_SIM */
4950 debug_write_function = rs_debug_write_function; 4525
4951 return 0; 4526 return 0;
4952} 4527}
4953 4528
diff --git a/drivers/serial/crisv10.h b/drivers/serial/crisv10.h
new file mode 100644
index 000000000000..ccd0f32b7372
--- /dev/null
+++ b/drivers/serial/crisv10.h
@@ -0,0 +1,146 @@
1/*
2 * serial.h: Arch-dep definitions for the Etrax100 serial driver.
3 *
4 * Copyright (C) 1998-2007 Axis Communications AB
5 */
6
7#ifndef _ETRAX_SERIAL_H
8#define _ETRAX_SERIAL_H
9
10#include <linux/circ_buf.h>
11#include <asm/termios.h>
12#include <asm/dma.h>
13#include <asm/arch/io_interface_mux.h>
14
15/* Software state per channel */
16
17#ifdef __KERNEL__
18/*
19 * This is our internal structure for each serial port's state.
20 *
21 * Many fields are paralleled by the structure used by the serial_struct
22 * structure.
23 *
24 * For definitions of the flags field, see tty.h
25 */
26
27#define SERIAL_RECV_DESCRIPTORS 8
28
29struct etrax_recv_buffer {
30 struct etrax_recv_buffer *next;
31 unsigned short length;
32 unsigned char error;
33 unsigned char pad;
34
35 unsigned char buffer[0];
36};
37
38struct e100_serial {
39 int baud;
40 volatile u8 *port; /* R_SERIALx_CTRL */
41 u32 irq; /* bitnr in R_IRQ_MASK2 for dmaX_descr */
42
43 /* Output registers */
44 volatile u8 *oclrintradr; /* adr to R_DMA_CHx_CLR_INTR */
45 volatile u32 *ofirstadr; /* adr to R_DMA_CHx_FIRST */
46 volatile u8 *ocmdadr; /* adr to R_DMA_CHx_CMD */
47 const volatile u8 *ostatusadr; /* adr to R_DMA_CHx_STATUS */
48
49 /* Input registers */
50 volatile u8 *iclrintradr; /* adr to R_DMA_CHx_CLR_INTR */
51 volatile u32 *ifirstadr; /* adr to R_DMA_CHx_FIRST */
52 volatile u8 *icmdadr; /* adr to R_DMA_CHx_CMD */
53 volatile u32 *idescradr; /* adr to R_DMA_CHx_DESCR */
54
55 int flags; /* defined in tty.h */
56
57 u8 rx_ctrl; /* shadow for R_SERIALx_REC_CTRL */
58 u8 tx_ctrl; /* shadow for R_SERIALx_TR_CTRL */
59 u8 iseteop; /* bit number for R_SET_EOP for the input dma */
60 int enabled; /* Set to 1 if the port is enabled in HW config */
61
62 u8 dma_out_enabled; /* Set to 1 if DMA should be used */
63 u8 dma_in_enabled; /* Set to 1 if DMA should be used */
64
65 /* end of fields defined in rs_table[] in .c-file */
66 int dma_owner;
67 unsigned int dma_in_nbr;
68 unsigned int dma_out_nbr;
69 unsigned int dma_in_irq_nbr;
70 unsigned int dma_out_irq_nbr;
71 unsigned long dma_in_irq_flags;
72 unsigned long dma_out_irq_flags;
73 char *dma_in_irq_description;
74 char *dma_out_irq_description;
75
76 enum cris_io_interface io_if;
77 char *io_if_description;
78
79 u8 uses_dma_in; /* Set to 1 if DMA is used */
80 u8 uses_dma_out; /* Set to 1 if DMA is used */
81 u8 forced_eop; /* a fifo eop has been forced */
82 int baud_base; /* For special baudrates */
83 int custom_divisor; /* For special baudrates */
84 struct etrax_dma_descr tr_descr;
85 struct etrax_dma_descr rec_descr[SERIAL_RECV_DESCRIPTORS];
86 int cur_rec_descr;
87
88 volatile int tr_running; /* 1 if output is running */
89
90 struct tty_struct *tty;
91 int read_status_mask;
92 int ignore_status_mask;
93 int x_char; /* xon/xoff character */
94 int close_delay;
95 unsigned short closing_wait;
96 unsigned short closing_wait2;
97 unsigned long event;
98 unsigned long last_active;
99 int line;
100 int type; /* PORT_ETRAX */
101 int count; /* # of fd on device */
102 int blocked_open; /* # of blocked opens */
103 struct circ_buf xmit;
104 struct etrax_recv_buffer *first_recv_buffer;
105 struct etrax_recv_buffer *last_recv_buffer;
106 unsigned int recv_cnt;
107 unsigned int max_recv_cnt;
108
109 struct work_struct work;
110 struct async_icount icount; /* error-statistics etc.*/
111 struct ktermios normal_termios;
112 struct ktermios callout_termios;
113 wait_queue_head_t open_wait;
114 wait_queue_head_t close_wait;
115
116 unsigned long char_time_usec; /* The time for 1 char, in usecs */
117 unsigned long flush_time_usec; /* How often we should flush */
118 unsigned long last_tx_active_usec; /* Last tx usec in the jiffies */
119 unsigned long last_tx_active; /* Last tx time in jiffies */
120 unsigned long last_rx_active_usec; /* Last rx usec in the jiffies */
121 unsigned long last_rx_active; /* Last rx time in jiffies */
122
123 int break_detected_cnt;
124 int errorcode;
125
126#ifdef CONFIG_ETRAX_RS485
127 struct rs485_control rs485; /* RS-485 support */
128#endif
129};
130
131/* this PORT is not in the standard serial.h. it's not actually used for
132 * anything since we only have one type of async serial-port anyway in this
133 * system.
134 */
135
136#define PORT_ETRAX 1
137
138/*
139 * Events are used to schedule things to happen at timer-interrupt
140 * time, instead of at rs interrupt time.
141 */
142#define RS_EVENT_WRITE_WAKEUP 0
143
144#endif /* __KERNEL__ */
145
146#endif /* !_ETRAX_SERIAL_H */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-30 02:14:48 -0500