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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / staging / comedi / drivers / das16.c
blobde926990624d5196b5faa3b782363f172751fbf5
1 /*
2 comedi/drivers/das16.c
3 DAS16 driver
4
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 2000 David A. Schleef <ds@schleef.org>
7 Copyright (C) 2000 Chris R. Baugher <baugher@enteract.com>
8 Copyright (C) 2001,2002 Frank Mori Hess <fmhess@users.sourceforge.net>
9
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
14
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23
24 ************************************************************************
25 */
26 /*
27 Driver: das16
28 Description: DAS16 compatible boards
29 Author: Sam Moore, Warren Jasper, ds, Chris Baugher, Frank Hess, Roman Fietze
30 Devices: [Keithley Metrabyte] DAS-16 (das-16), DAS-16G (das-16g),
31 DAS-16F (das-16f), DAS-1201 (das-1201), DAS-1202 (das-1202),
32 DAS-1401 (das-1401), DAS-1402 (das-1402), DAS-1601 (das-1601),
33 DAS-1602 (das-1602),
34 [ComputerBoards] PC104-DAS16/JR (pc104-das16jr),
35 PC104-DAS16JR/16 (pc104-das16jr/16),
36 CIO-DAS16JR/16 (cio-das16jr/16),
37 CIO-DAS16/JR (cio-das16/jr), CIO-DAS1401/12 (cio-das1401/12),
38 CIO-DAS1402/12 (cio-das1402/12), CIO-DAS1402/16 (cio-das1402/16),
39 CIO-DAS1601/12 (cio-das1601/12), CIO-DAS1602/12 (cio-das1602/12),
40 CIO-DAS1602/16 (cio-das1602/16), CIO-DAS16/330 (cio-das16/330)
41 Status: works
42 Updated: 2003-10-12
43
44 A rewrite of the das16 and das1600 drivers.
45 Options:
46 [0] - base io address
47 [1] - irq (does nothing, irq is not used anymore)
48 [2] - dma (optional, required for comedi_command support)
49 [3] - master clock speed in MHz (optional, 1 or 10, ignored if
50 board can probe clock, defaults to 1)
51 [4] - analog input range lowest voltage in microvolts (optional,
52 only useful if your board does not have software
53 programmable gain)
54 [5] - analog input range highest voltage in microvolts (optional,
55 only useful if board does not have software programmable
56 gain)
57 [6] - analog output range lowest voltage in microvolts (optional)
58 [7] - analog output range highest voltage in microvolts (optional)
59 [8] - use timer mode for DMA. Timer mode is needed e.g. for
60 buggy DMA controllers in NS CS5530A (Geode Companion), and for
61 'jr' cards that lack a hardware fifo. This option is no
62 longer needed, since timer mode is _always_ used.
63
64 Passing a zero for an option is the same as leaving it unspecified.
65
66 */
67 /*
68
69 Testing and debugging help provided by Daniel Koch.
70
71 Keithley Manuals:
72 2309.PDF (das16)
73 4919.PDF (das1400, 1600)
74 4922.PDF (das-1400)
75 4923.PDF (das1200, 1400, 1600)
76
77 Computer boards manuals also available from their website
78 www.measurementcomputing.com
79
80 */
81
82 #include <linux/pci.h>
83 #include <linux/slab.h>
84 #include <linux/interrupt.h>
85 #include <asm/dma.h>
86 #include "../comedidev.h"
87
88 #include "8253.h"
89 #include "8255.h"
90 #include "comedi_fc.h"
91
92 #undef DEBUG
93 /* #define DEBUG */
94
95 #ifdef DEBUG
96 #define DEBUG_PRINT(format, args...) \
97 printk(KERN_DEBUG "das16: " format, ## args)
98 #else
99 #define DEBUG_PRINT(format, args...)
100 #endif
101
102 #define DAS16_SIZE 20 /* number of ioports */
103 #define DAS16_DMA_SIZE 0xff00 /* size in bytes of allocated dma buffer */
104
105 /*
106 cio-das16.pdf
107
108 "das16"
109 "das16/f"
110
111 0 a/d bits 0-3 start 12 bit
112 1 a/d bits 4-11 unused
113 2 mux read mux set
114 3 di 4 bit do 4 bit
115 4 unused ao0_lsb
116 5 unused ao0_msb
117 6 unused ao1_lsb
118 7 unused ao1_msb
119 8 status eoc uni/bip interrupt reset
120 9 dma, int, trig ctrl set dma, int
121 a pacer control unused
122 b reserved reserved
123 cdef 8254
124 0123 8255
125
126 */
127
128 /*
129 cio-das16jr.pdf
130
131 "das16jr"
132
133 0 a/d bits 0-3 start 12 bit
134 1 a/d bits 4-11 unused
135 2 mux read mux set
136 3 di 4 bit do 4 bit
137 4567 unused unused
138 8 status eoc uni/bip interrupt reset
139 9 dma, int, trig ctrl set dma, int
140 a pacer control unused
141 b gain status gain control
142 cdef 8254
143
144 */
145
146 /*
147 cio-das16jr_16.pdf
148
149 "das16jr_16"
150
151 0 a/d bits 0-7 start 16 bit
152 1 a/d bits 8-15 unused
153 2 mux read mux set
154 3 di 4 bit do 4 bit
155 4567 unused unused
156 8 status eoc uni/bip interrupt reset
157 9 dma, int, trig ctrl set dma, int
158 a pacer control unused
159 b gain status gain control
160 cdef 8254
161
162 */
163 /*
164 cio-das160x-1x.pdf
165
166 "das1601/12"
167 "das1602/12"
168 "das1602/16"
169
170 0 a/d bits 0-3 start 12 bit
171 1 a/d bits 4-11 unused
172 2 mux read mux set
173 3 di 4 bit do 4 bit
174 4 unused ao0_lsb
175 5 unused ao0_msb
176 6 unused ao1_lsb
177 7 unused ao1_msb
178 8 status eoc uni/bip interrupt reset
179 9 dma, int, trig ctrl set dma, int
180 a pacer control unused
181 b gain status gain control
182 cdef 8254
183 400 8255
184 404 unused conversion enable
185 405 unused burst enable
186 406 unused das1600 enable
187 407 status
188
189 */
190
191 /* size in bytes of a sample from board */
192 static const int sample_size = 2;
193
194 #define DAS16_TRIG 0
195 #define DAS16_AI_LSB 0
196 #define DAS16_AI_MSB 1
197 #define DAS16_MUX 2
198 #define DAS16_DIO 3
199 #define DAS16_AO_LSB(x) ((x) ? 6 : 4)
200 #define DAS16_AO_MSB(x) ((x) ? 7 : 5)
201 #define DAS16_STATUS 8
202 #define BUSY (1<<7)
203 #define UNIPOLAR (1<<6)
204 #define DAS16_MUXBIT (1<<5)
205 #define DAS16_INT (1<<4)
206 #define DAS16_CONTROL 9
207 #define DAS16_INTE (1<<7)
208 #define DAS16_IRQ(x) (((x) & 0x7) << 4)
209 #define DMA_ENABLE (1<<2)
210 #define PACING_MASK 0x3
211 #define INT_PACER 0x03
212 #define EXT_PACER 0x02
213 #define DAS16_SOFT 0x00
214 #define DAS16_PACER 0x0A
215 #define DAS16_CTR0 (1<<1)
216 #define DAS16_TRIG0 (1<<0)
217 #define BURST_LEN_BITS(x) (((x) & 0xf) << 4)
218 #define DAS16_GAIN 0x0B
219 #define DAS16_CNTR0_DATA 0x0C
220 #define DAS16_CNTR1_DATA 0x0D
221 #define DAS16_CNTR2_DATA 0x0E
222 #define DAS16_CNTR_CONTROL 0x0F
223 #define DAS16_TERM_CNT 0x00
224 #define DAS16_ONE_SHOT 0x02
225 #define DAS16_RATE_GEN 0x04
226 #define DAS16_CNTR_LSB_MSB 0x30
227 #define DAS16_CNTR0 0x00
228 #define DAS16_CNTR1 0x40
229 #define DAS16_CNTR2 0x80
230
231 #define DAS1600_CONV 0x404
232 #define DAS1600_CONV_DISABLE 0x40
233 #define DAS1600_BURST 0x405
234 #define DAS1600_BURST_VAL 0x40
235 #define DAS1600_ENABLE 0x406
236 #define DAS1600_ENABLE_VAL 0x40
237 #define DAS1600_STATUS_B 0x407
238 #define DAS1600_BME 0x40
239 #define DAS1600_ME 0x20
240 #define DAS1600_CD 0x10
241 #define DAS1600_WS 0x02
242 #define DAS1600_CLK_10MHZ 0x01
243
244 static const struct comedi_lrange range_das1x01_bip = { 4, {
245 BIP_RANGE(10),
246 BIP_RANGE(1),
247 BIP_RANGE(0.1),
248 BIP_RANGE(0.01),
249 }
250 };
251
252 static const struct comedi_lrange range_das1x01_unip = { 4, {
253 UNI_RANGE(10),
254 UNI_RANGE(1),
255 UNI_RANGE(0.1),
256 UNI_RANGE(0.01),
257 }
258 };
259
260 static const struct comedi_lrange range_das1x02_bip = { 4, {
261 BIP_RANGE(10),
262 BIP_RANGE(5),
263 BIP_RANGE(2.5),
264 BIP_RANGE(1.25),
265 }
266 };
267
268 static const struct comedi_lrange range_das1x02_unip = { 4, {
269 UNI_RANGE(10),
270 UNI_RANGE(5),
271 UNI_RANGE(2.5),
272 UNI_RANGE(1.25),
273 }
274 };
275
276 static const struct comedi_lrange range_das16jr = { 9, {
277 /* also used by 16/330 */
278 BIP_RANGE(10),
279 BIP_RANGE(5),
280 BIP_RANGE(2.5),
281 BIP_RANGE(1.25),
282 BIP_RANGE(0.625),
283 UNI_RANGE(10),
284 UNI_RANGE(5),
285 UNI_RANGE(2.5),
286 UNI_RANGE(1.25),
287 }
288 };
289
290 static const struct comedi_lrange range_das16jr_16 = { 8, {
291 BIP_RANGE(10),
292 BIP_RANGE(5),
293 BIP_RANGE(2.5),
294 BIP_RANGE(1.25),
295 UNI_RANGE(10),
296 UNI_RANGE(5),
297 UNI_RANGE(2.5),
298 UNI_RANGE(1.25),
299 }
300 };
301
302 static const int das16jr_gainlist[] = { 8, 0, 1, 2, 3, 4, 5, 6, 7 };
303 static const int das16jr_16_gainlist[] = { 0, 1, 2, 3, 4, 5, 6, 7 };
304 static const int das1600_gainlist[] = { 0, 1, 2, 3 };
305
306 enum {
307 das16_pg_none = 0,
308 das16_pg_16jr,
309 das16_pg_16jr_16,
310 das16_pg_1601,
311 das16_pg_1602,
312 };
313 static const int *const das16_gainlists[] = {
314 NULL,
315 das16jr_gainlist,
316 das16jr_16_gainlist,
317 das1600_gainlist,
318 das1600_gainlist,
319 };
320
321 static const struct comedi_lrange *const das16_ai_uni_lranges[] = {
322 &range_unknown,
323 &range_das16jr,
324 &range_das16jr_16,
325 &range_das1x01_unip,
326 &range_das1x02_unip,
327 };
328
329 static const struct comedi_lrange *const das16_ai_bip_lranges[] = {
330 &range_unknown,
331 &range_das16jr,
332 &range_das16jr_16,
333 &range_das1x01_bip,
334 &range_das1x02_bip,
335 };
336
337 struct munge_info {
338 uint8_t byte;
339 unsigned have_byte:1;
340 };
341
342 static int das16_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
343 struct comedi_insn *insn, unsigned int *data);
344 static int das16_do_wbits(struct comedi_device *dev, struct comedi_subdevice *s,
345 struct comedi_insn *insn, unsigned int *data);
346 static int das16_di_rbits(struct comedi_device *dev, struct comedi_subdevice *s,
347 struct comedi_insn *insn, unsigned int *data);
348 static int das16_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
349 struct comedi_insn *insn, unsigned int *data);
350
351 static int das16_cmd_test(struct comedi_device *dev, struct comedi_subdevice *s,
352 struct comedi_cmd *cmd);
353 static int das16_cmd_exec(struct comedi_device *dev,
354 struct comedi_subdevice *s);
355 static int das16_cancel(struct comedi_device *dev, struct comedi_subdevice *s);
356 static void das16_ai_munge(struct comedi_device *dev,
357 struct comedi_subdevice *s, void *array,
358 unsigned int num_bytes,
359 unsigned int start_chan_index);
360
361 static void das16_reset(struct comedi_device *dev);
362 static irqreturn_t das16_dma_interrupt(int irq, void *d);
363 static void das16_timer_interrupt(unsigned long arg);
364 static void das16_interrupt(struct comedi_device *dev);
365
366 static unsigned int das16_set_pacer(struct comedi_device *dev, unsigned int ns,
367 int flags);
368 static int das1600_mode_detect(struct comedi_device *dev);
369 static unsigned int das16_suggest_transfer_size(struct comedi_device *dev,
370 struct comedi_cmd cmd);
371
372 static void reg_dump(struct comedi_device *dev);
373
374 struct das16_board {
375 const char *name;
376 void *ai;
377 unsigned int ai_nbits;
378 unsigned int ai_speed; /* max conversion speed in nanosec */
379 unsigned int ai_pg;
380 void *ao;
381 unsigned int ao_nbits;
382 void *di;
383 void *do_;
384
385 unsigned int i8255_offset;
386 unsigned int i8254_offset;
387
388 unsigned int size;
389 unsigned int id;
390 };
391
392 static const struct das16_board das16_boards[] = {
393 {
394 .name = "das-16",
395 .ai = das16_ai_rinsn,
396 .ai_nbits = 12,
397 .ai_speed = 15000,
398 .ai_pg = das16_pg_none,
399 .ao = das16_ao_winsn,
400 .ao_nbits = 12,
401 .di = das16_di_rbits,
402 .do_ = das16_do_wbits,
403 .i8255_offset = 0x10,
404 .i8254_offset = 0x0c,
405 .size = 0x14,
406 .id = 0x00,
407 },
408 {
409 .name = "das-16g",
410 .ai = das16_ai_rinsn,
411 .ai_nbits = 12,
412 .ai_speed = 15000,
413 .ai_pg = das16_pg_none,
414 .ao = das16_ao_winsn,
415 .ao_nbits = 12,
416 .di = das16_di_rbits,
417 .do_ = das16_do_wbits,
418 .i8255_offset = 0x10,
419 .i8254_offset = 0x0c,
420 .size = 0x14,
421 .id = 0x00,
422 },
423 {
424 .name = "das-16f",
425 .ai = das16_ai_rinsn,
426 .ai_nbits = 12,
427 .ai_speed = 8500,
428 .ai_pg = das16_pg_none,
429 .ao = das16_ao_winsn,
430 .ao_nbits = 12,
431 .di = das16_di_rbits,
432 .do_ = das16_do_wbits,
433 .i8255_offset = 0x10,
434 .i8254_offset = 0x0c,
435 .size = 0x14,
436 .id = 0x00,
437 },
438 {
439 .name = "cio-das16", /* cio-das16.pdf */
440 .ai = das16_ai_rinsn,
441 .ai_nbits = 12,
442 .ai_speed = 20000,
443 .ai_pg = das16_pg_none,
444 .ao = das16_ao_winsn,
445 .ao_nbits = 12,
446 .di = das16_di_rbits,
447 .do_ = das16_do_wbits,
448 .i8255_offset = 0x10,
449 .i8254_offset = 0x0c,
450 .size = 0x14,
451 .id = 0x80,
452 },
453 {
454 .name = "cio-das16/f", /* das16.pdf */
455 .ai = das16_ai_rinsn,
456 .ai_nbits = 12,
457 .ai_speed = 10000,
458 .ai_pg = das16_pg_none,
459 .ao = das16_ao_winsn,
460 .ao_nbits = 12,
461 .di = das16_di_rbits,
462 .do_ = das16_do_wbits,
463 .i8255_offset = 0x10,
464 .i8254_offset = 0x0c,
465 .size = 0x14,
466 .id = 0x80,
467 },
468 {
469 .name = "cio-das16/jr", /* cio-das16jr.pdf */
470 .ai = das16_ai_rinsn,
471 .ai_nbits = 12,
472 .ai_speed = 7692,
473 .ai_pg = das16_pg_16jr,
474 .ao = NULL,
475 .di = das16_di_rbits,
476 .do_ = das16_do_wbits,
477 .i8255_offset = 0,
478 .i8254_offset = 0x0c,
479 .size = 0x10,
480 .id = 0x00,
481 },
482 {
483 .name = "pc104-das16jr", /* pc104-das16jr_xx.pdf */
484 .ai = das16_ai_rinsn,
485 .ai_nbits = 12,
486 .ai_speed = 3300,
487 .ai_pg = das16_pg_16jr,
488 .ao = NULL,
489 .di = das16_di_rbits,
490 .do_ = das16_do_wbits,
491 .i8255_offset = 0,
492 .i8254_offset = 0x0c,
493 .size = 0x10,
494 .id = 0x00,
495 },
496 {
497 .name = "cio-das16jr/16", /* cio-das16jr_16.pdf */
498 .ai = das16_ai_rinsn,
499 .ai_nbits = 16,
500 .ai_speed = 10000,
501 .ai_pg = das16_pg_16jr_16,
502 .ao = NULL,
503 .di = das16_di_rbits,
504 .do_ = das16_do_wbits,
505 .i8255_offset = 0,
506 .i8254_offset = 0x0c,
507 .size = 0x10,
508 .id = 0x00,
509 },
510 {
511 .name = "pc104-das16jr/16", /* pc104-das16jr_xx.pdf */
512 .ai = das16_ai_rinsn,
513 .ai_nbits = 16,
514 .ai_speed = 10000,
515 .ai_pg = das16_pg_16jr_16,
516 .ao = NULL,
517 .di = das16_di_rbits,
518 .do_ = das16_do_wbits,
519 .i8255_offset = 0,
520 .i8254_offset = 0x0c,
521 .size = 0x10,
522 .id = 0x00,
523 },
524 {
525 .name = "das-1201", /* 4924.pdf (keithley user's manual) */
526 .ai = das16_ai_rinsn,
527 .ai_nbits = 12,
528 .ai_speed = 20000,
529 .ai_pg = das16_pg_none,
530 .ao = NULL,
531 .di = das16_di_rbits,
532 .do_ = das16_do_wbits,
533 .i8255_offset = 0x400,
534 .i8254_offset = 0x0c,
535 .size = 0x408,
536 .id = 0x20,
537 },
538 {
539 .name = "das-1202", /* 4924.pdf (keithley user's manual) */
540 .ai = das16_ai_rinsn,
541 .ai_nbits = 12,
542 .ai_speed = 10000,
543 .ai_pg = das16_pg_none,
544 .ao = NULL,
545 .di = das16_di_rbits,
546 .do_ = das16_do_wbits,
547 .i8255_offset = 0x400,
548 .i8254_offset = 0x0c,
549 .size = 0x408,
550 .id = 0x20,
551 },
552 {
553 /* 4919.pdf and 4922.pdf (keithley user's manual) */
554 .name = "das-1401",
555 .ai = das16_ai_rinsn,
556 .ai_nbits = 12,
557 .ai_speed = 10000,
558 .ai_pg = das16_pg_1601,
559 .ao = NULL,
560 .di = das16_di_rbits,
561 .do_ = das16_do_wbits,
562 .i8255_offset = 0x0,
563 .i8254_offset = 0x0c,
564 .size = 0x408,
565 .id = 0xc0 /* 4919.pdf says id bits are 0xe0, 4922.pdf says 0xc0 */
566 },
567 {
568 /* 4919.pdf and 4922.pdf (keithley user's manual) */
569 .name = "das-1402",
570 .ai = das16_ai_rinsn,
571 .ai_nbits = 12,
572 .ai_speed = 10000,
573 .ai_pg = das16_pg_1602,
574 .ao = NULL,
575 .di = das16_di_rbits,
576 .do_ = das16_do_wbits,
577 .i8255_offset = 0x0,
578 .i8254_offset = 0x0c,
579 .size = 0x408,
580 .id = 0xc0 /* 4919.pdf says id bits are 0xe0, 4922.pdf says 0xc0 */
581 },
582 {
583 .name = "das-1601", /* 4919.pdf */
584 .ai = das16_ai_rinsn,
585 .ai_nbits = 12,
586 .ai_speed = 10000,
587 .ai_pg = das16_pg_1601,
588 .ao = das16_ao_winsn,
589 .ao_nbits = 12,
590 .di = das16_di_rbits,
591 .do_ = das16_do_wbits,
592 .i8255_offset = 0x400,
593 .i8254_offset = 0x0c,
594 .size = 0x408,
595 .id = 0xc0},
596 {
597 .name = "das-1602", /* 4919.pdf */
598 .ai = das16_ai_rinsn,
599 .ai_nbits = 12,
600 .ai_speed = 10000,
601 .ai_pg = das16_pg_1602,
602 .ao = das16_ao_winsn,
603 .ao_nbits = 12,
604 .di = das16_di_rbits,
605 .do_ = das16_do_wbits,
606 .i8255_offset = 0x400,
607 .i8254_offset = 0x0c,
608 .size = 0x408,
609 .id = 0xc0},
610 {
611 .name = "cio-das1401/12", /* cio-das1400_series.pdf */
612 .ai = das16_ai_rinsn,
613 .ai_nbits = 12,
614 .ai_speed = 6250,
615 .ai_pg = das16_pg_1601,
616 .ao = NULL,
617 .di = das16_di_rbits,
618 .do_ = das16_do_wbits,
619 .i8255_offset = 0,
620 .i8254_offset = 0x0c,
621 .size = 0x408,
622 .id = 0xc0},
623 {
624 .name = "cio-das1402/12", /* cio-das1400_series.pdf */
625 .ai = das16_ai_rinsn,
626 .ai_nbits = 12,
627 .ai_speed = 6250,
628 .ai_pg = das16_pg_1602,
629 .ao = NULL,
630 .di = das16_di_rbits,
631 .do_ = das16_do_wbits,
632 .i8255_offset = 0,
633 .i8254_offset = 0x0c,
634 .size = 0x408,
635 .id = 0xc0},
636 {
637 .name = "cio-das1402/16", /* cio-das1400_series.pdf */
638 .ai = das16_ai_rinsn,
639 .ai_nbits = 16,
640 .ai_speed = 10000,
641 .ai_pg = das16_pg_1602,
642 .ao = NULL,
643 .di = das16_di_rbits,
644 .do_ = das16_do_wbits,
645 .i8255_offset = 0,
646 .i8254_offset = 0x0c,
647 .size = 0x408,
648 .id = 0xc0},
649 {
650 .name = "cio-das1601/12", /* cio-das160x-1x.pdf */
651 .ai = das16_ai_rinsn,
652 .ai_nbits = 12,
653 .ai_speed = 6250,
654 .ai_pg = das16_pg_1601,
655 .ao = das16_ao_winsn,
656 .ao_nbits = 12,
657 .di = das16_di_rbits,
658 .do_ = das16_do_wbits,
659 .i8255_offset = 0x400,
660 .i8254_offset = 0x0c,
661 .size = 0x408,
662 .id = 0xc0},
663 {
664 .name = "cio-das1602/12", /* cio-das160x-1x.pdf */
665 .ai = das16_ai_rinsn,
666 .ai_nbits = 12,
667 .ai_speed = 10000,
668 .ai_pg = das16_pg_1602,
669 .ao = das16_ao_winsn,
670 .ao_nbits = 12,
671 .di = das16_di_rbits,
672 .do_ = das16_do_wbits,
673 .i8255_offset = 0x400,
674 .i8254_offset = 0x0c,
675 .size = 0x408,
676 .id = 0xc0},
677 {
678 .name = "cio-das1602/16", /* cio-das160x-1x.pdf */
679 .ai = das16_ai_rinsn,
680 .ai_nbits = 16,
681 .ai_speed = 10000,
682 .ai_pg = das16_pg_1602,
683 .ao = das16_ao_winsn,
684 .ao_nbits = 12,
685 .di = das16_di_rbits,
686 .do_ = das16_do_wbits,
687 .i8255_offset = 0x400,
688 .i8254_offset = 0x0c,
689 .size = 0x408,
690 .id = 0xc0},
691 {
692 .name = "cio-das16/330", /* ? */
693 .ai = das16_ai_rinsn,
694 .ai_nbits = 12,
695 .ai_speed = 3030,
696 .ai_pg = das16_pg_16jr,
697 .ao = NULL,
698 .di = das16_di_rbits,
699 .do_ = das16_do_wbits,
700 .i8255_offset = 0,
701 .i8254_offset = 0x0c,
702 .size = 0x14,
703 .id = 0xf0},
704 };
705
706 static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it);
707 static int das16_detach(struct comedi_device *dev);
708 static struct comedi_driver driver_das16 = {
709 .driver_name = "das16",
710 .module = THIS_MODULE,
711 .attach = das16_attach,
712 .detach = das16_detach,
713 .board_name = &das16_boards[0].name,
714 .num_names = ARRAY_SIZE(das16_boards),
715 .offset = sizeof(das16_boards[0]),
716 };
717
718 #define DAS16_TIMEOUT 1000
719
720 /* Period for timer interrupt in jiffies. It's a function
721 * to deal with possibility of dynamic HZ patches */
722 static inline int timer_period(void)
723 {
724 return HZ / 20;
725 }
726
727 struct das16_private_struct {
728 unsigned int ai_unipolar; /* unipolar flag */
729 unsigned int ai_singleended; /* single ended flag */
730 unsigned int clockbase; /* master clock speed in ns */
731 volatile unsigned int control_state; /* dma, interrupt and trigger control bits */
732 volatile unsigned long adc_byte_count; /* number of bytes remaining */
733 /* divisor dividing master clock to get conversion frequency */
734 unsigned int divisor1;
735 /* divisor dividing master clock to get conversion frequency */
736 unsigned int divisor2;
737 unsigned int dma_chan; /* dma channel */
738 uint16_t *dma_buffer[2];
739 dma_addr_t dma_buffer_addr[2];
740 unsigned int current_buffer;
741 volatile unsigned int dma_transfer_size; /* target number of bytes to transfer per dma shot */
742 /**
743 * user-defined analog input and output ranges
744 * defined from config options
745 */
746 struct comedi_lrange *user_ai_range_table;
747 struct comedi_lrange *user_ao_range_table;
748
749 struct timer_list timer; /* for timed interrupt */
750 volatile short timer_running;
751 volatile short timer_mode; /* true if using timer mode */
752 };
753 #define devpriv ((struct das16_private_struct *)(dev->private))
754 #define thisboard ((struct das16_board *)(dev->board_ptr))
755
756 static int das16_cmd_test(struct comedi_device *dev, struct comedi_subdevice *s,
757 struct comedi_cmd *cmd)
758 {
759 int err = 0, tmp;
760 int gain, start_chan, i;
761 int mask;
762
763 /* make sure triggers are valid */
764 tmp = cmd->start_src;
765 cmd->start_src &= TRIG_NOW;
766 if (!cmd->start_src || tmp != cmd->start_src)
767 err++;
768
769 tmp = cmd->scan_begin_src;
770 mask = TRIG_FOLLOW;
771 /* if board supports burst mode */
772 if (thisboard->size > 0x400)
773 mask |= TRIG_TIMER | TRIG_EXT;
774 cmd->scan_begin_src &= mask;
775 if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
776 err++;
777
778 tmp = cmd->convert_src;
779 mask = TRIG_TIMER | TRIG_EXT;
780 /* if board supports burst mode */
781 if (thisboard->size > 0x400)
782 mask |= TRIG_NOW;
783 cmd->convert_src &= mask;
784 if (!cmd->convert_src || tmp != cmd->convert_src)
785 err++;
786
787 tmp = cmd->scan_end_src;
788 cmd->scan_end_src &= TRIG_COUNT;
789 if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
790 err++;
791
792 tmp = cmd->stop_src;
793 cmd->stop_src &= TRIG_COUNT | TRIG_NONE;
794 if (!cmd->stop_src || tmp != cmd->stop_src)
795 err++;
796
797 if (err)
798 return 1;
799
800 /**
801 * step 2: make sure trigger sources are unique and
802 * mutually compatible
803 */
804 if (cmd->scan_begin_src != TRIG_TIMER &&
805 cmd->scan_begin_src != TRIG_EXT &&
806 cmd->scan_begin_src != TRIG_FOLLOW)
807 err++;
808 if (cmd->convert_src != TRIG_TIMER &&
809 cmd->convert_src != TRIG_EXT && cmd->convert_src != TRIG_NOW)
810 err++;
811 if (cmd->stop_src != TRIG_NONE && cmd->stop_src != TRIG_COUNT)
812 err++;
813
814 /* make sure scan_begin_src and convert_src dont conflict */
815 if (cmd->scan_begin_src == TRIG_FOLLOW && cmd->convert_src == TRIG_NOW)
816 err++;
817 if (cmd->scan_begin_src != TRIG_FOLLOW && cmd->convert_src != TRIG_NOW)
818 err++;
819
820 if (err)
821 return 2;
822
823 /* step 3: make sure arguments are trivially compatible */
824 if (cmd->start_arg != 0) {
825 cmd->start_arg = 0;
826 err++;
827 }
828
829 if (cmd->scan_begin_src == TRIG_FOLLOW) {
830 /* internal trigger */
831 if (cmd->scan_begin_arg != 0) {
832 cmd->scan_begin_arg = 0;
833 err++;
834 }
835 }
836
837 if (cmd->scan_end_arg != cmd->chanlist_len) {
838 cmd->scan_end_arg = cmd->chanlist_len;
839 err++;
840 }
841 /* check against maximum frequency */
842 if (cmd->scan_begin_src == TRIG_TIMER) {
843 if (cmd->scan_begin_arg <
844 thisboard->ai_speed * cmd->chanlist_len) {
845 cmd->scan_begin_arg =
846 thisboard->ai_speed * cmd->chanlist_len;
847 err++;
848 }
849 }
850 if (cmd->convert_src == TRIG_TIMER) {
851 if (cmd->convert_arg < thisboard->ai_speed) {
852 cmd->convert_arg = thisboard->ai_speed;
853 err++;
854 }
855 }
856
857 if (cmd->stop_src == TRIG_NONE) {
858 if (cmd->stop_arg != 0) {
859 cmd->stop_arg = 0;
860 err++;
861 }
862 }
863 if (err)
864 return 3;
865
866 /* step 4: fix up arguments */
867 if (cmd->scan_begin_src == TRIG_TIMER) {
868 unsigned int tmp = cmd->scan_begin_arg;
869 /* set divisors, correct timing arguments */
870 i8253_cascade_ns_to_timer_2div(devpriv->clockbase,
871 &(devpriv->divisor1),
872 &(devpriv->divisor2),
873 &(cmd->scan_begin_arg),
874 cmd->flags & TRIG_ROUND_MASK);
875 err += (tmp != cmd->scan_begin_arg);
876 }
877 if (cmd->convert_src == TRIG_TIMER) {
878 unsigned int tmp = cmd->convert_arg;
879 /* set divisors, correct timing arguments */
880 i8253_cascade_ns_to_timer_2div(devpriv->clockbase,
881 &(devpriv->divisor1),
882 &(devpriv->divisor2),
883 &(cmd->convert_arg),
884 cmd->flags & TRIG_ROUND_MASK);
885 err += (tmp != cmd->convert_arg);
886 }
887 if (err)
888 return 4;
889
890 /* check channel/gain list against card's limitations */
891 if (cmd->chanlist) {
892 gain = CR_RANGE(cmd->chanlist[0]);
893 start_chan = CR_CHAN(cmd->chanlist[0]);
894 for (i = 1; i < cmd->chanlist_len; i++) {
895 if (CR_CHAN(cmd->chanlist[i]) !=
896 (start_chan + i) % s->n_chan) {
897 comedi_error(dev,
898 "entries in chanlist must be "
899 "consecutive channels, "
900 "counting upwards\n");
901 err++;
902 }
903 if (CR_RANGE(cmd->chanlist[i]) != gain) {
904 comedi_error(dev,
905 "entries in chanlist must all "
906 "have the same gain\n");
907 err++;
908 }
909 }
910 }
911 if (err)
912 return 5;
913
914 return 0;
915 }
916
917 static int das16_cmd_exec(struct comedi_device *dev, struct comedi_subdevice *s)
918 {
919 struct comedi_async *async = s->async;
920 struct comedi_cmd *cmd = &async->cmd;
921 unsigned int byte;
922 unsigned long flags;
923 int range;
924
925 if (devpriv->dma_chan == 0 || (dev->irq == 0
926 && devpriv->timer_mode == 0)) {
927 comedi_error(dev,
928 "irq (or use of 'timer mode') dma required to "
929 "execute comedi_cmd");
930 return -1;
931 }
932 if (cmd->flags & TRIG_RT) {
933 comedi_error(dev, "isa dma transfers cannot be performed with "
934 "TRIG_RT, aborting");
935 return -1;
936 }
937
938 devpriv->adc_byte_count =
939 cmd->stop_arg * cmd->chanlist_len * sizeof(uint16_t);
940
941 /* disable conversions for das1600 mode */
942 if (thisboard->size > 0x400)
943 outb(DAS1600_CONV_DISABLE, dev->iobase + DAS1600_CONV);
944
945 /* set scan limits */
946 byte = CR_CHAN(cmd->chanlist[0]);
947 byte |= CR_CHAN(cmd->chanlist[cmd->chanlist_len - 1]) << 4;
948 outb(byte, dev->iobase + DAS16_MUX);
949
950 /* set gain (this is also burst rate register but according to
951 * computer boards manual, burst rate does nothing, even on
952 * keithley cards) */
953 if (thisboard->ai_pg != das16_pg_none) {
954 range = CR_RANGE(cmd->chanlist[0]);
955 outb((das16_gainlists[thisboard->ai_pg])[range],
956 dev->iobase + DAS16_GAIN);
957 }
958
959 /* set counter mode and counts */
960 cmd->convert_arg =
961 das16_set_pacer(dev, cmd->convert_arg,
962 cmd->flags & TRIG_ROUND_MASK);
963 DEBUG_PRINT("pacer period: %d ns\n", cmd->convert_arg);
964
965 /* enable counters */
966 byte = 0;
967 /* Enable burst mode if appropriate. */
968 if (thisboard->size > 0x400) {
969 if (cmd->convert_src == TRIG_NOW) {
970 outb(DAS1600_BURST_VAL, dev->iobase + DAS1600_BURST);
971 /* set burst length */
972 byte |= BURST_LEN_BITS(cmd->chanlist_len - 1);
973 } else {
974 outb(0, dev->iobase + DAS1600_BURST);
975 }
976 }
977 outb(byte, dev->iobase + DAS16_PACER);
978
979 /* set up dma transfer */
980 flags = claim_dma_lock();
981 disable_dma(devpriv->dma_chan);
982 /* clear flip-flop to make sure 2-byte registers for
983 * count and address get set correctly */
984 clear_dma_ff(devpriv->dma_chan);
985 devpriv->current_buffer = 0;
986 set_dma_addr(devpriv->dma_chan,
987 devpriv->dma_buffer_addr[devpriv->current_buffer]);
988 /* set appropriate size of transfer */
989 devpriv->dma_transfer_size = das16_suggest_transfer_size(dev, *cmd);
990 set_dma_count(devpriv->dma_chan, devpriv->dma_transfer_size);
991 enable_dma(devpriv->dma_chan);
992 release_dma_lock(flags);
993
994 /* set up interrupt */
995 if (devpriv->timer_mode) {
996 devpriv->timer_running = 1;
997 devpriv->timer.expires = jiffies + timer_period();
998 add_timer(&devpriv->timer);
999 devpriv->control_state &= ~DAS16_INTE;
1000 } else {
1001 /* clear interrupt bit */
1002 outb(0x00, dev->iobase + DAS16_STATUS);
1003 /* enable interrupts */
1004 devpriv->control_state |= DAS16_INTE;
1005 }
1006 devpriv->control_state |= DMA_ENABLE;
1007 devpriv->control_state &= ~PACING_MASK;
1008 if (cmd->convert_src == TRIG_EXT)
1009 devpriv->control_state |= EXT_PACER;
1010 else
1011 devpriv->control_state |= INT_PACER;
1012 outb(devpriv->control_state, dev->iobase + DAS16_CONTROL);
1013
1014 /* Enable conversions if using das1600 mode */
1015 if (thisboard->size > 0x400)
1016 outb(0, dev->iobase + DAS1600_CONV);
1017
1018
1019 return 0;
1020 }
1021
1022 static int das16_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
1023 {
1024 unsigned long flags;
1025
1026 spin_lock_irqsave(&dev->spinlock, flags);
1027 /* disable interrupts, dma and pacer clocked conversions */
1028 devpriv->control_state &= ~DAS16_INTE & ~PACING_MASK & ~DMA_ENABLE;
1029 outb(devpriv->control_state, dev->iobase + DAS16_CONTROL);
1030 if (devpriv->dma_chan)
1031 disable_dma(devpriv->dma_chan);
1032
1033 /* disable SW timer */
1034 if (devpriv->timer_mode && devpriv->timer_running) {
1035 devpriv->timer_running = 0;
1036 del_timer(&devpriv->timer);
1037 }
1038
1039 /* disable burst mode */
1040 if (thisboard->size > 0x400)
1041 outb(0, dev->iobase + DAS1600_BURST);
1042
1043
1044 spin_unlock_irqrestore(&dev->spinlock, flags);
1045
1046 return 0;
1047 }
1048
1049 static void das16_reset(struct comedi_device *dev)
1050 {
1051 outb(0, dev->iobase + DAS16_STATUS);
1052 outb(0, dev->iobase + DAS16_CONTROL);
1053 outb(0, dev->iobase + DAS16_PACER);
1054 outb(0, dev->iobase + DAS16_CNTR_CONTROL);
1055 }
1056
1057 static int das16_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
1058 struct comedi_insn *insn, unsigned int *data)
1059 {
1060 int i, n;
1061 int range;
1062 int chan;
1063 int msb, lsb;
1064
1065 /* disable interrupts and pacing */
1066 devpriv->control_state &= ~DAS16_INTE & ~DMA_ENABLE & ~PACING_MASK;
1067 outb(devpriv->control_state, dev->iobase + DAS16_CONTROL);
1068
1069 /* set multiplexer */
1070 chan = CR_CHAN(insn->chanspec);
1071 chan |= CR_CHAN(insn->chanspec) << 4;
1072 outb(chan, dev->iobase + DAS16_MUX);
1073
1074 /* set gain */
1075 if (thisboard->ai_pg != das16_pg_none) {
1076 range = CR_RANGE(insn->chanspec);
1077 outb((das16_gainlists[thisboard->ai_pg])[range],
1078 dev->iobase + DAS16_GAIN);
1079 }
1080
1081 for (n = 0; n < insn->n; n++) {
1082 /* trigger conversion */
1083 outb_p(0, dev->iobase + DAS16_TRIG);
1084
1085 for (i = 0; i < DAS16_TIMEOUT; i++) {
1086 if (!(inb(dev->iobase + DAS16_STATUS) & BUSY))
1087 break;
1088 }
1089 if (i == DAS16_TIMEOUT) {
1090 printk("das16: timeout\n");
1091 return -ETIME;
1092 }
1093 msb = inb(dev->iobase + DAS16_AI_MSB);
1094 lsb = inb(dev->iobase + DAS16_AI_LSB);
1095 if (thisboard->ai_nbits == 12)
1096 data[n] = ((lsb >> 4) & 0xf) | (msb << 4);
1097 else
1098 data[n] = lsb | (msb << 8);
1099
1100 }
1101
1102 return n;
1103 }
1104
1105 static int das16_di_rbits(struct comedi_device *dev, struct comedi_subdevice *s,
1106 struct comedi_insn *insn, unsigned int *data)
1107 {
1108 unsigned int bits;
1109
1110 bits = inb(dev->iobase + DAS16_DIO) & 0xf;
1111 data[1] = bits;
1112 data[0] = 0;
1113
1114 return 2;
1115 }
1116
1117 static int das16_do_wbits(struct comedi_device *dev, struct comedi_subdevice *s,
1118 struct comedi_insn *insn, unsigned int *data)
1119 {
1120 unsigned int wbits;
1121
1122 /* only set bits that have been masked */
1123 data[0] &= 0xf;
1124 wbits = s->state;
1125 /* zero bits that have been masked */
1126 wbits &= ~data[0];
1127 /* set masked bits */
1128 wbits |= data[0] & data[1];
1129 s->state = wbits;
1130 data[1] = wbits;
1131
1132 outb(s->state, dev->iobase + DAS16_DIO);
1133
1134 return 2;
1135 }
1136
1137 static int das16_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
1138 struct comedi_insn *insn, unsigned int *data)
1139 {
1140 int i;
1141 int lsb, msb;
1142 int chan;
1143
1144 chan = CR_CHAN(insn->chanspec);
1145
1146 for (i = 0; i < insn->n; i++) {
1147 if (thisboard->ao_nbits == 12) {
1148 lsb = (data[i] << 4) & 0xff;
1149 msb = (data[i] >> 4) & 0xff;
1150 } else {
1151 lsb = data[i] & 0xff;
1152 msb = (data[i] >> 8) & 0xff;
1153 }
1154 outb(lsb, dev->iobase + DAS16_AO_LSB(chan));
1155 outb(msb, dev->iobase + DAS16_AO_MSB(chan));
1156 }
1157
1158 return i;
1159 }
1160
1161 static irqreturn_t das16_dma_interrupt(int irq, void *d)
1162 {
1163 int status;
1164 struct comedi_device *dev = d;
1165
1166 status = inb(dev->iobase + DAS16_STATUS);
1167
1168 if ((status & DAS16_INT) == 0) {
1169 DEBUG_PRINT("spurious interrupt\n");
1170 return IRQ_NONE;
1171 }
1172
1173 /* clear interrupt */
1174 outb(0x00, dev->iobase + DAS16_STATUS);
1175 das16_interrupt(dev);
1176 return IRQ_HANDLED;
1177 }
1178
1179 static void das16_timer_interrupt(unsigned long arg)
1180 {
1181 struct comedi_device *dev = (struct comedi_device *)arg;
1182
1183 das16_interrupt(dev);
1184
1185 if (devpriv->timer_running)
1186 mod_timer(&devpriv->timer, jiffies + timer_period());
1187 }
1188
1189 /* the pc104-das16jr (at least) has problems if the dma
1190 transfer is interrupted in the middle of transferring
1191 a 16 bit sample, so this function takes care to get
1192 an even transfer count after disabling dma
1193 channel.
1194 */
1195 static int disable_dma_on_even(struct comedi_device *dev)
1196 {
1197 int residue;
1198 int i;
1199 static const int disable_limit = 100;
1200 static const int enable_timeout = 100;
1201 disable_dma(devpriv->dma_chan);
1202 residue = get_dma_residue(devpriv->dma_chan);
1203 for (i = 0; i < disable_limit && (residue % 2); ++i) {
1204 int j;
1205 enable_dma(devpriv->dma_chan);
1206 for (j = 0; j < enable_timeout; ++j) {
1207 int new_residue;
1208 udelay(2);
1209 new_residue = get_dma_residue(devpriv->dma_chan);
1210 if (new_residue != residue)
1211 break;
1212 }
1213 disable_dma(devpriv->dma_chan);
1214 residue = get_dma_residue(devpriv->dma_chan);
1215 }
1216 if (i == disable_limit) {
1217 comedi_error(dev, "failed to get an even dma transfer, "
1218 "could be trouble.");
1219 }
1220 return residue;
1221 }
1222
1223 static void das16_interrupt(struct comedi_device *dev)
1224 {
1225 unsigned long dma_flags, spin_flags;
1226 struct comedi_subdevice *s = dev->read_subdev;
1227 struct comedi_async *async;
1228 struct comedi_cmd *cmd;
1229 int num_bytes, residue;
1230 int buffer_index;
1231
1232 if (dev->attached == 0) {
1233 comedi_error(dev, "premature interrupt");
1234 return;
1235 }
1236 /* initialize async here to make sure it is not NULL */
1237 async = s->async;
1238 cmd = &async->cmd;
1239
1240 if (devpriv->dma_chan == 0) {
1241 comedi_error(dev, "interrupt with no dma channel?");
1242 return;
1243 }
1244
1245 spin_lock_irqsave(&dev->spinlock, spin_flags);
1246 if ((devpriv->control_state & DMA_ENABLE) == 0) {
1247 spin_unlock_irqrestore(&dev->spinlock, spin_flags);
1248 DEBUG_PRINT("interrupt while dma disabled?\n");
1249 return;
1250 }
1251
1252 dma_flags = claim_dma_lock();
1253 clear_dma_ff(devpriv->dma_chan);
1254 residue = disable_dma_on_even(dev);
1255
1256 /* figure out how many points to read */
1257 if (residue > devpriv->dma_transfer_size) {
1258 comedi_error(dev, "residue > transfer size!\n");
1259 async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA;
1260 num_bytes = 0;
1261 } else
1262 num_bytes = devpriv->dma_transfer_size - residue;
1263
1264 if (cmd->stop_src == TRIG_COUNT &&
1265 num_bytes >= devpriv->adc_byte_count) {
1266 num_bytes = devpriv->adc_byte_count;
1267 async->events |= COMEDI_CB_EOA;
1268 }
1269
1270 buffer_index = devpriv->current_buffer;
1271 devpriv->current_buffer = (devpriv->current_buffer + 1) % 2;
1272 devpriv->adc_byte_count -= num_bytes;
1273
1274 /* figure out how many bytes for next transfer */
1275 if (cmd->stop_src == TRIG_COUNT && devpriv->timer_mode == 0 &&
1276 devpriv->dma_transfer_size > devpriv->adc_byte_count)
1277 devpriv->dma_transfer_size = devpriv->adc_byte_count;
1278
1279 /* re-enable dma */
1280 if ((async->events & COMEDI_CB_EOA) == 0) {
1281 set_dma_addr(devpriv->dma_chan,
1282 devpriv->dma_buffer_addr[devpriv->current_buffer]);
1283 set_dma_count(devpriv->dma_chan, devpriv->dma_transfer_size);
1284 enable_dma(devpriv->dma_chan);
1285 /* reenable conversions for das1600 mode, (stupid hardware) */
1286 if (thisboard->size > 0x400 && devpriv->timer_mode == 0)
1287 outb(0x00, dev->iobase + DAS1600_CONV);
1288
1289 }
1290 release_dma_lock(dma_flags);
1291
1292 spin_unlock_irqrestore(&dev->spinlock, spin_flags);
1293
1294 cfc_write_array_to_buffer(s,
1295 devpriv->dma_buffer[buffer_index], num_bytes);
1296
1297 cfc_handle_events(dev, s);
1298 }
1299
1300 static unsigned int das16_set_pacer(struct comedi_device *dev, unsigned int ns,
1301 int rounding_flags)
1302 {
1303 i8253_cascade_ns_to_timer_2div(devpriv->clockbase, &(devpriv->divisor1),
1304 &(devpriv->divisor2), &ns,
1305 rounding_flags & TRIG_ROUND_MASK);
1306
1307 /* Write the values of ctr1 and ctr2 into counters 1 and 2 */
1308 i8254_load(dev->iobase + DAS16_CNTR0_DATA, 0, 1, devpriv->divisor1, 2);
1309 i8254_load(dev->iobase + DAS16_CNTR0_DATA, 0, 2, devpriv->divisor2, 2);
1310
1311 return ns;
1312 }
1313
1314 static void reg_dump(struct comedi_device *dev)
1315 {
1316 DEBUG_PRINT("********DAS1600 REGISTER DUMP********\n");
1317 DEBUG_PRINT("DAS16_MUX: %x\n", inb(dev->iobase + DAS16_MUX));
1318 DEBUG_PRINT("DAS16_DIO: %x\n", inb(dev->iobase + DAS16_DIO));
1319 DEBUG_PRINT("DAS16_STATUS: %x\n", inb(dev->iobase + DAS16_STATUS));
1320 DEBUG_PRINT("DAS16_CONTROL: %x\n", inb(dev->iobase + DAS16_CONTROL));
1321 DEBUG_PRINT("DAS16_PACER: %x\n", inb(dev->iobase + DAS16_PACER));
1322 DEBUG_PRINT("DAS16_GAIN: %x\n", inb(dev->iobase + DAS16_GAIN));
1323 DEBUG_PRINT("DAS16_CNTR_CONTROL: %x\n",
1324 inb(dev->iobase + DAS16_CNTR_CONTROL));
1325 DEBUG_PRINT("DAS1600_CONV: %x\n", inb(dev->iobase + DAS1600_CONV));
1326 DEBUG_PRINT("DAS1600_BURST: %x\n", inb(dev->iobase + DAS1600_BURST));
1327 DEBUG_PRINT("DAS1600_ENABLE: %x\n", inb(dev->iobase + DAS1600_ENABLE));
1328 DEBUG_PRINT("DAS1600_STATUS_B: %x\n",
1329 inb(dev->iobase + DAS1600_STATUS_B));
1330 }
1331
1332 static int das16_probe(struct comedi_device *dev, struct comedi_devconfig *it)
1333 {
1334 int status;
1335 int diobits;
1336
1337 /* status is available on all boards */
1338
1339 status = inb(dev->iobase + DAS16_STATUS);
1340
1341 if ((status & UNIPOLAR))
1342 devpriv->ai_unipolar = 1;
1343 else
1344 devpriv->ai_unipolar = 0;
1345
1346
1347 if ((status & DAS16_MUXBIT))
1348 devpriv->ai_singleended = 1;
1349 else
1350 devpriv->ai_singleended = 0;
1351
1352
1353 /* diobits indicates boards */
1354
1355 diobits = inb(dev->iobase + DAS16_DIO) & 0xf0;
1356
1357 printk(KERN_INFO " id bits are 0x%02x\n", diobits);
1358 if (thisboard->id != diobits) {
1359 printk(KERN_INFO " requested board's id bits are 0x%x (ignore)\n",
1360 thisboard->id);
1361 }
1362
1363 return 0;
1364 }
1365
1366 static int das1600_mode_detect(struct comedi_device *dev)
1367 {
1368 int status = 0;
1369
1370 status = inb(dev->iobase + DAS1600_STATUS_B);
1371
1372 if (status & DAS1600_CLK_10MHZ) {
1373 devpriv->clockbase = 100;
1374 printk(KERN_INFO " 10MHz pacer clock\n");
1375 } else {
1376 devpriv->clockbase = 1000;
1377 printk(KERN_INFO " 1MHz pacer clock\n");
1378 }
1379
1380 reg_dump(dev);
1381
1382 return 0;
1383 }
1384
1385 /*
1386 *
1387 * Options list:
1388 * 0 I/O base
1389 * 1 IRQ
1390 * 2 DMA
1391 * 3 Clock speed (in MHz)
1392 */
1393
1394 static int das16_attach(struct comedi_device *dev, struct comedi_devconfig *it)
1395 {
1396 struct comedi_subdevice *s;
1397 int ret;
1398 unsigned int irq;
1399 unsigned long iobase;
1400 unsigned int dma_chan;
1401 int timer_mode;
1402 unsigned long flags;
1403 struct comedi_krange *user_ai_range, *user_ao_range;
1404
1405 iobase = it->options[0];
1406 /* always use time_mode since using irq can drop samples while
1407 * waiting for dma done interrupt (due to hardware limitations) */
1408 irq = 0;
1409 timer_mode = 1;
1410 if (timer_mode)
1411 irq = 0;
1412
1413 printk(KERN_INFO "comedi%d: das16:", dev->minor);
1414
1415 /* check that clock setting is valid */
1416 if (it->options[3]) {
1417 if (it->options[3] != 0 &&
1418 it->options[3] != 1 && it->options[3] != 10) {
1419 printk
1420 ("\n Invalid option. Master clock must be set "
1421 "to 1 or 10 (MHz)\n");
1422 return -EINVAL;
1423 }
1424 }
1425
1426 ret = alloc_private(dev, sizeof(struct das16_private_struct));
1427 if (ret < 0)
1428 return ret;
1429
1430 if (thisboard->size < 0x400) {
1431 printk(" 0x%04lx-0x%04lx\n", iobase, iobase + thisboard->size);
1432 if (!request_region(iobase, thisboard->size, "das16")) {
1433 printk(KERN_ERR " I/O port conflict\n");
1434 return -EIO;
1435 }
1436 } else {
1437 printk(KERN_INFO " 0x%04lx-0x%04lx 0x%04lx-0x%04lx\n",
1438 iobase, iobase + 0x0f,
1439 iobase + 0x400,
1440 iobase + 0x400 + (thisboard->size & 0x3ff));
1441 if (!request_region(iobase, 0x10, "das16")) {
1442 printk(KERN_ERR " I/O port conflict: 0x%04lx-0x%04lx\n",
1443 iobase, iobase + 0x0f);
1444 return -EIO;
1445 }
1446 if (!request_region(iobase + 0x400, thisboard->size & 0x3ff,
1447 "das16")) {
1448 release_region(iobase, 0x10);
1449 printk(KERN_ERR " I/O port conflict: 0x%04lx-0x%04lx\n",
1450 iobase + 0x400,
1451 iobase + 0x400 + (thisboard->size & 0x3ff));
1452 return -EIO;
1453 }
1454 }
1455
1456 dev->iobase = iobase;
1457
1458 /* probe id bits to make sure they are consistent */
1459 if (das16_probe(dev, it)) {
1460 printk(KERN_ERR " id bits do not match selected board, aborting\n");
1461 return -EINVAL;
1462 }
1463 dev->board_name = thisboard->name;
1464
1465 /* get master clock speed */
1466 if (thisboard->size < 0x400) {
1467 if (it->options[3])
1468 devpriv->clockbase = 1000 / it->options[3];
1469 else
1470 devpriv->clockbase = 1000; /* 1 MHz default */
1471 } else {
1472 das1600_mode_detect(dev);
1473 }
1474
1475 /* now for the irq */
1476 if (irq > 1 && irq < 8) {
1477 ret = request_irq(irq, das16_dma_interrupt, 0, "das16", dev);
1478
1479 if (ret < 0)
1480 return ret;
1481 dev->irq = irq;
1482 printk(KERN_INFO " ( irq = %u )", irq);
1483 } else if (irq == 0) {
1484 printk(" ( no irq )");
1485 } else {
1486 printk(" invalid irq\n");
1487 return -EINVAL;
1488 }
1489
1490 /* initialize dma */
1491 dma_chan = it->options[2];
1492 if (dma_chan == 1 || dma_chan == 3) {
1493 /* allocate dma buffers */
1494 int i;
1495 for (i = 0; i < 2; i++) {
1496 devpriv->dma_buffer[i] = pci_alloc_consistent(
1497 NULL, DAS16_DMA_SIZE,
1498 &devpriv->dma_buffer_addr[i]);
1499
1500 if (devpriv->dma_buffer[i] == NULL)
1501 return -ENOMEM;
1502 }
1503 if (request_dma(dma_chan, "das16")) {
1504 printk(KERN_ERR " failed to allocate dma channel %i\n",
1505 dma_chan);
1506 return -EINVAL;
1507 }
1508 devpriv->dma_chan = dma_chan;
1509 flags = claim_dma_lock();
1510 disable_dma(devpriv->dma_chan);
1511 set_dma_mode(devpriv->dma_chan, DMA_MODE_READ);
1512 release_dma_lock(flags);
1513 printk(KERN_INFO " ( dma = %u)\n", dma_chan);
1514 } else if (dma_chan == 0) {
1515 printk(KERN_INFO " ( no dma )\n");
1516 } else {
1517 printk(KERN_ERR " invalid dma channel\n");
1518 return -EINVAL;
1519 }
1520
1521 /* get any user-defined input range */
1522 if (thisboard->ai_pg == das16_pg_none &&
1523 (it->options[4] || it->options[5])) {
1524 /* allocate single-range range table */
1525 devpriv->user_ai_range_table =
1526 kmalloc(sizeof(struct comedi_lrange) +
1527 sizeof(struct comedi_krange), GFP_KERNEL);
1528 /* initialize ai range */
1529 devpriv->user_ai_range_table->length = 1;
1530 user_ai_range = devpriv->user_ai_range_table->range;
1531 user_ai_range->min = it->options[4];
1532 user_ai_range->max = it->options[5];
1533 user_ai_range->flags = UNIT_volt;
1534 }
1535 /* get any user-defined output range */
1536 if (it->options[6] || it->options[7]) {
1537 /* allocate single-range range table */
1538 devpriv->user_ao_range_table =
1539 kmalloc(sizeof(struct comedi_lrange) +
1540 sizeof(struct comedi_krange), GFP_KERNEL);
1541 /* initialize ao range */
1542 devpriv->user_ao_range_table->length = 1;
1543 user_ao_range = devpriv->user_ao_range_table->range;
1544 user_ao_range->min = it->options[6];
1545 user_ao_range->max = it->options[7];
1546 user_ao_range->flags = UNIT_volt;
1547 }
1548
1549 if (timer_mode) {
1550 init_timer(&(devpriv->timer));
1551 devpriv->timer.function = das16_timer_interrupt;
1552 devpriv->timer.data = (unsigned long)dev;
1553 }
1554 devpriv->timer_mode = timer_mode ? 1 : 0;
1555
1556 ret = alloc_subdevices(dev, 5);
1557 if (ret < 0)
1558 return ret;
1559
1560 s = dev->subdevices + 0;
1561 dev->read_subdev = s;
1562 /* ai */
1563 if (thisboard->ai) {
1564 s->type = COMEDI_SUBD_AI;
1565 s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
1566 if (devpriv->ai_singleended) {
1567 s->n_chan = 16;
1568 s->len_chanlist = 16;
1569 s->subdev_flags |= SDF_GROUND;
1570 } else {
1571 s->n_chan = 8;
1572 s->len_chanlist = 8;
1573 s->subdev_flags |= SDF_DIFF;
1574 }
1575 s->maxdata = (1 << thisboard->ai_nbits) - 1;
1576 if (devpriv->user_ai_range_table) { /* user defined ai range */
1577 s->range_table = devpriv->user_ai_range_table;
1578 } else if (devpriv->ai_unipolar) {
1579 s->range_table = das16_ai_uni_lranges[thisboard->ai_pg];
1580 } else {
1581 s->range_table = das16_ai_bip_lranges[thisboard->ai_pg];
1582 }
1583 s->insn_read = thisboard->ai;
1584 s->do_cmdtest = das16_cmd_test;
1585 s->do_cmd = das16_cmd_exec;
1586 s->cancel = das16_cancel;
1587 s->munge = das16_ai_munge;
1588 } else {
1589 s->type = COMEDI_SUBD_UNUSED;
1590 }
1591
1592 s = dev->subdevices + 1;
1593 /* ao */
1594 if (thisboard->ao) {
1595 s->type = COMEDI_SUBD_AO;
1596 s->subdev_flags = SDF_WRITABLE;
1597 s->n_chan = 2;
1598 s->maxdata = (1 << thisboard->ao_nbits) - 1;
1599 /* user defined ao range */
1600 if (devpriv->user_ao_range_table)
1601 s->range_table = devpriv->user_ao_range_table;
1602 else
1603 s->range_table = &range_unknown;
1604
1605 s->insn_write = thisboard->ao;
1606 } else {
1607 s->type = COMEDI_SUBD_UNUSED;
1608 }
1609
1610 s = dev->subdevices + 2;
1611 /* di */
1612 if (thisboard->di) {
1613 s->type = COMEDI_SUBD_DI;
1614 s->subdev_flags = SDF_READABLE;
1615 s->n_chan = 4;
1616 s->maxdata = 1;
1617 s->range_table = &range_digital;
1618 s->insn_bits = thisboard->di;
1619 } else {
1620 s->type = COMEDI_SUBD_UNUSED;
1621 }
1622
1623 s = dev->subdevices + 3;
1624 /* do */
1625 if (thisboard->do_) {
1626 s->type = COMEDI_SUBD_DO;
1627 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
1628 s->n_chan = 4;
1629 s->maxdata = 1;
1630 s->range_table = &range_digital;
1631 s->insn_bits = thisboard->do_;
1632 /* initialize digital output lines */
1633 outb(s->state, dev->iobase + DAS16_DIO);
1634 } else {
1635 s->type = COMEDI_SUBD_UNUSED;
1636 }
1637
1638 s = dev->subdevices + 4;
1639 /* 8255 */
1640 if (thisboard->i8255_offset != 0) {
1641 subdev_8255_init(dev, s, NULL, (dev->iobase +
1642 thisboard->i8255_offset));
1643 } else {
1644 s->type = COMEDI_SUBD_UNUSED;
1645 }
1646
1647 das16_reset(dev);
1648 /* set the interrupt level */
1649 devpriv->control_state = DAS16_IRQ(dev->irq);
1650 outb(devpriv->control_state, dev->iobase + DAS16_CONTROL);
1651
1652 /* turn on das1600 mode if available */
1653 if (thisboard->size > 0x400) {
1654 outb(DAS1600_ENABLE_VAL, dev->iobase + DAS1600_ENABLE);
1655 outb(0, dev->iobase + DAS1600_CONV);
1656 outb(0, dev->iobase + DAS1600_BURST);
1657 }
1658
1659 return 0;
1660 }
1661
1662 static int das16_detach(struct comedi_device *dev)
1663 {
1664 printk(KERN_INFO "comedi%d: das16: remove\n", dev->minor);
1665
1666 das16_reset(dev);
1667
1668 if (dev->subdevices)
1669 subdev_8255_cleanup(dev, dev->subdevices + 4);
1670
1671 if (devpriv) {
1672 int i;
1673 for (i = 0; i < 2; i++) {
1674 if (devpriv->dma_buffer[i])
1675 pci_free_consistent(NULL, DAS16_DMA_SIZE,
1676 devpriv->dma_buffer[i],
1677 devpriv->
1678 dma_buffer_addr[i]);
1679 }
1680 if (devpriv->dma_chan)
1681 free_dma(devpriv->dma_chan);
1682 if (devpriv->user_ai_range_table)
1683 kfree(devpriv->user_ai_range_table);
1684 if (devpriv->user_ao_range_table)
1685 kfree(devpriv->user_ao_range_table);
1686 }
1687
1688 if (dev->irq)
1689 free_irq(dev->irq, dev);
1690
1691 if (dev->iobase) {
1692 if (thisboard->size < 0x400) {
1693 release_region(dev->iobase, thisboard->size);
1694 } else {
1695 release_region(dev->iobase, 0x10);
1696 release_region(dev->iobase + 0x400,
1697 thisboard->size & 0x3ff);
1698 }
1699 }
1700
1701 return 0;
1702 }
1703
1704 static int __init driver_das16_init_module(void)
1705 {
1706 return comedi_driver_register(&driver_das16);
1707 }
1708
1709 static void __exit driver_das16_cleanup_module(void)
1710 {
1711 comedi_driver_unregister(&driver_das16);
1712 }
1713
1714 module_init(driver_das16_init_module);
1715 module_exit(driver_das16_cleanup_module);
1716
1717 /* utility function that suggests a dma transfer size in bytes */
1718 static unsigned int das16_suggest_transfer_size(struct comedi_device *dev,
1719 struct comedi_cmd cmd)
1720 {
1721 unsigned int size;
1722 unsigned int freq;
1723
1724 /* if we are using timer interrupt, we don't care how long it
1725 * will take to complete transfer since it will be interrupted
1726 * by timer interrupt */
1727 if (devpriv->timer_mode)
1728 return DAS16_DMA_SIZE;
1729
1730 /* otherwise, we are relying on dma terminal count interrupt,
1731 * so pick a reasonable size */
1732 if (cmd.convert_src == TRIG_TIMER)
1733 freq = 1000000000 / cmd.convert_arg;
1734 else if (cmd.scan_begin_src == TRIG_TIMER)
1735 freq = (1000000000 / cmd.scan_begin_arg) * cmd.chanlist_len;
1736 /* return some default value */
1737 else
1738 freq = 0xffffffff;
1739
1740 if (cmd.flags & TRIG_WAKE_EOS) {
1741 size = sample_size * cmd.chanlist_len;
1742 } else {
1743 /* make buffer fill in no more than 1/3 second */
1744 size = (freq / 3) * sample_size;
1745 }
1746
1747 /* set a minimum and maximum size allowed */
1748 if (size > DAS16_DMA_SIZE)
1749 size = DAS16_DMA_SIZE - DAS16_DMA_SIZE % sample_size;
1750 else if (size < sample_size)
1751 size = sample_size;
1752
1753 if (cmd.stop_src == TRIG_COUNT && size > devpriv->adc_byte_count)
1754 size = devpriv->adc_byte_count;
1755
1756 return size;
1757 }
1758
1759 static void das16_ai_munge(struct comedi_device *dev,
1760 struct comedi_subdevice *s, void *array,
1761 unsigned int num_bytes,
1762 unsigned int start_chan_index)
1763 {
1764 unsigned int i, num_samples = num_bytes / sizeof(short);
1765 short *data = array;
1766
1767 for (i = 0; i < num_samples; i++) {
1768 data[i] = le16_to_cpu(data[i]);
1769 if (thisboard->ai_nbits == 12)
1770 data[i] = (data[i] >> 4) & 0xfff;
1771
1772 }
1773 }
1774
1775 MODULE_AUTHOR("Comedi http://www.comedi.org");
1776 MODULE_DESCRIPTION("Comedi low-level driver");
1777 MODULE_LICENSE("GPL");
Tomato firmware and modifications.