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Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty...
[deliverable/linux.git] / drivers / staging / comedi / drivers / ii_pci20kc.c
1 /*
2 * comedi/drivers/ii_pci20kc.c
3 * Driver for Intelligent Instruments PCI-20001C carrier board
4 * and modules.
5 *
6 * Copyright (C) 2000 Markus Kempf <kempf@matsci.uni-sb.de>
7 * with suggestions from David Schleef
8 * 16.06.2000
9 *
10 * Linux device driver for COMEDI
11 * Intelligent Instrumentation
12 * PCI-20001 C-2A Carrier Board
13 * PCI-20341 M-1A 16-Bit analog input module
14 * - differential
15 * - range (-5V - +5V)
16 * - 16 bit
17 * PCI-20006 M-2 16-Bit analog output module
18 * - ranges (-10V - +10V) (0V - +10V) (-5V - +5V)
19 * - 16 bit
20 *
21 * only ONE PCI-20341 module possible
22 * only ONE PCI-20006 module possible
23 * no extern trigger implemented
24 *
25 * NOT WORKING (but soon) only 4 on-board differential channels supported
26 * NOT WORKING (but soon) only ONE di-port and ONE do-port supported
27 * instead of 4 digital ports
28 * di-port == Port 0
29 * do-port == Port 1
30 *
31 * The state of this driver is only a starting point for a complete
32 * COMEDI-driver. The final driver should support all features of the
33 * carrier board and modules.
34 *
35 * The test configuration:
36 *
37 * kernel 2.2.14 with RTAI v1.2 and patch-2.2.14rthal2
38 * COMEDI 0.7.45
39 * COMEDILIB 0.7.9
40 *
41 */
42 /*
43 Driver: ii_pci20kc
44 Description: Intelligent Instruments PCI-20001C carrier board
45 Author: Markus Kempf <kempf@matsci.uni-sb.de>
46 Devices: [Intelligent Instrumentation] PCI-20001C (ii_pci20kc)
47 Status: works
48
49 Supports the PCI-20001 C-2a Carrier board, and could probably support
50 the other carrier boards with small modifications. Modules supported
51 are:
52 PCI-20006 M-2 16-bit analog output module
53 PCI-20341 M-1A 16-bit analog input module
54
55 Options:
56 0 Board base address
57 1 IRQ
58 2 first option for module 1
59 3 second option for module 1
60 4 first option for module 2
61 5 second option for module 2
62 6 first option for module 3
63 7 second option for module 3
64
65 options for PCI-20006M:
66 first: Analog output channel 0 range configuration
67 0 bipolar 10 (-10V -- +10V)
68 1 unipolar 10 (0V -- +10V)
69 2 bipolar 5 (-5V -- 5V)
70 second: Analog output channel 1 range configuration
71
72 options for PCI-20341M:
73 first: Analog input gain configuration
74 0 1
75 1 10
76 2 100
77 3 200
78 */
79
80 /* XXX needs to use ioremap() for compatibility with 2.4 kernels. Should also
81 * check_mem_region() etc. - fmhess */
82
83 #include "../comedidev.h"
84
85 #define PCI20000_ID 0x1d
86 #define PCI20341_ID 0x77
87 #define PCI20006_ID 0xe3
88 #define PCI20xxx_EMPTY_ID 0xff
89
90 #define PCI20000_OFFSET 0x100
91 #define PCI20000_MODULES 3
92
93 #define PCI20000_DIO_0 0x80
94 #define PCI20000_DIO_1 0x81
95 #define PCI20000_DIO_2 0xc0
96 #define PCI20000_DIO_3 0xc1
97 #define PCI20000_DIO_CONTROL_01 0x83 /* port 0, 1 control */
98 #define PCI20000_DIO_CONTROL_23 0xc3 /* port 2, 3 control */
99 #define PCI20000_DIO_BUFFER 0x82 /* buffer direction & enable */
100 #define PCI20000_DIO_EOC 0xef /* even port, control output */
101 #define PCI20000_DIO_OOC 0xfd /* odd port, control output */
102 #define PCI20000_DIO_EIC 0x90 /* even port, control input */
103 #define PCI20000_DIO_OIC 0x82 /* odd port, control input */
104 #define DIO_CAND 0x12 /* and bit 1 & 4 of control */
105 #define DIO_BE 0x01 /* buffer: port enable */
106 #define DIO_BO 0x04 /* buffer: output */
107 #define DIO_BI 0x05 /* buffer: input */
108 #define DIO_PS_0 0x00 /* buffer: port shift 0 */
109 #define DIO_PS_1 0x01 /* buffer: port shift 1 */
110 #define DIO_PS_2 0x04 /* buffer: port shift 2 */
111 #define DIO_PS_3 0x05 /* buffer: port shift 3 */
112
113 #define PCI20006_LCHAN0 0x0d
114 #define PCI20006_STROBE0 0x0b
115 #define PCI20006_LCHAN1 0x15
116 #define PCI20006_STROBE1 0x13
117
118 #define PCI20341_INIT 0x04
119 #define PCI20341_REPMODE 0x00 /* single shot mode */
120 #define PCI20341_PACER 0x00 /* Hardware Pacer disabled */
121 #define PCI20341_CHAN_NR 0x04 /* number of input channels */
122 #define PCI20341_CONFIG_REG 0x10
123 #define PCI20341_MOD_STATUS 0x01
124 #define PCI20341_OPT_REG 0x11
125 #define PCI20341_SET_TIME_REG 0x15
126 #define PCI20341_LCHAN_ADDR_REG 0x13
127 #define PCI20341_CHAN_LIST 0x80
128 #define PCI20341_CC_RESET 0x1b
129 #define PCI20341_CHAN_RESET 0x19
130 #define PCI20341_SOFT_PACER 0x04
131 #define PCI20341_STATUS_REG 0x12
132 #define PCI20341_LDATA 0x02
133 #define PCI20341_DAISY_CHAIN 0x20 /* On-board inputs only */
134 #define PCI20341_MUX 0x04 /* Enable on-board MUX */
135 #define PCI20341_SCANLIST 0x80 /* Channel/Gain Scan List */
136
137 union pci20xxx_subdev_private {
138 void __iomem *iobase;
139 struct {
140 void __iomem *iobase;
141 const struct comedi_lrange *ao_range_list[2];
142 /* range of channels of ao module */
143 unsigned int last_data[2];
144 } pci20006;
145 struct {
146 void __iomem *iobase;
147 int timebase;
148 int settling_time;
149 int ai_gain;
150 } pci20341;
151 };
152
153 struct pci20xxx_private {
154
155 void __iomem *ioaddr;
156 union pci20xxx_subdev_private subdev_private[PCI20000_MODULES];
157 };
158
159 #define devpriv ((struct pci20xxx_private *)dev->private)
160 #define CHAN (CR_CHAN(it->chanlist[0]))
161
162 static int pci20006_init(struct comedi_device *dev, struct comedi_subdevice *s,
163 int opt0, int opt1);
164 static int pci20341_init(struct comedi_device *dev, struct comedi_subdevice *s,
165 int opt0, int opt1);
166 static int pci20xxx_dio_init(struct comedi_device *dev,
167 struct comedi_subdevice *s);
168
169 /*
170 options[0] Board base address
171 options[1] IRQ
172 options[2] first option for module 1
173 options[3] second option for module 1
174 options[4] first option for module 2
175 options[5] second option for module 2
176 options[6] first option for module 3
177 options[7] second option for module 3
178
179 options for PCI-20341M:
180 first Analog input gain configuration
181 0 == 1
182 1 == 10
183 2 == 100
184 3 == 200
185
186 options for PCI-20006M:
187 first Analog output channel 0 range configuration
188 0 == bipolar 10 (-10V -- +10V)
189 1 == unipolar 10V (0V -- +10V)
190 2 == bipolar 5V (-5V -- +5V)
191 second Analog output channel 1 range configuration
192 0 == bipolar 10 (-10V -- +10V)
193 1 == unipolar 10V (0V -- +10V)
194 2 == bipolar 5V (-5V -- +5V)
195 */
196 static int pci20xxx_attach(struct comedi_device *dev,
197 struct comedi_devconfig *it)
198 {
199 unsigned char i;
200 int ret;
201 int id;
202 struct comedi_subdevice *s;
203 union pci20xxx_subdev_private *sdp;
204
205 ret = comedi_alloc_subdevices(dev, 1 + PCI20000_MODULES);
206 if (ret)
207 return ret;
208
209 ret = alloc_private(dev, sizeof(struct pci20xxx_private));
210 if (ret < 0)
211 return ret;
212
213 devpriv->ioaddr = (void __iomem *)(unsigned long)it->options[0];
214 dev->board_name = "pci20kc";
215
216 /* Check PCI-20001 C-2A Carrier Board ID */
217 if ((readb(devpriv->ioaddr) & PCI20000_ID) != PCI20000_ID) {
218 printk(KERN_WARNING "comedi%d: ii_pci20kc PCI-20001"
219 " C-2A Carrier Board at base=0x%p not found !\n",
220 dev->minor, devpriv->ioaddr);
221 return -EINVAL;
222 }
223 printk(KERN_INFO "comedi%d: ii_pci20kc: PCI-20001 C-2A at base=0x%p\n",
224 dev->minor, devpriv->ioaddr);
225
226 for (i = 0; i < PCI20000_MODULES; i++) {
227 s = &dev->subdevices[i];
228 id = readb(devpriv->ioaddr + (i + 1) * PCI20000_OFFSET);
229 s->private = devpriv->subdev_private + i;
230 sdp = s->private;
231 switch (id) {
232 case PCI20006_ID:
233 sdp->pci20006.iobase =
234 devpriv->ioaddr + (i + 1) * PCI20000_OFFSET;
235 pci20006_init(dev, s, it->options[2 * i + 2],
236 it->options[2 * i + 3]);
237 printk(KERN_INFO "comedi%d: "
238 "ii_pci20kc PCI-20006 module in slot %d\n",
239 dev->minor, i + 1);
240 break;
241 case PCI20341_ID:
242 sdp->pci20341.iobase =
243 devpriv->ioaddr + (i + 1) * PCI20000_OFFSET;
244 pci20341_init(dev, s, it->options[2 * i + 2],
245 it->options[2 * i + 3]);
246 printk(KERN_INFO "comedi%d: "
247 "ii_pci20kc PCI-20341 module in slot %d\n",
248 dev->minor, i + 1);
249 break;
250 default:
251 printk(KERN_WARNING "ii_pci20kc: unknown module "
252 "code 0x%02x in slot %d: module disabled\n",
253 id, i); /* XXX this looks like a bug! i + 1 ?? */
254 /* fall through */
255 case PCI20xxx_EMPTY_ID:
256 s->type = COMEDI_SUBD_UNUSED;
257 break;
258 }
259 }
260
261 /* initialize struct pci20xxx_private */
262 pci20xxx_dio_init(dev, &dev->subdevices[PCI20000_MODULES]);
263
264 return 1;
265 }
266
267 static void pci20xxx_detach(struct comedi_device *dev)
268 {
269 /* Nothing to cleanup */
270 }
271
272 /* pci20006m */
273
274 static int pci20006_insn_read(struct comedi_device *dev,
275 struct comedi_subdevice *s,
276 struct comedi_insn *insn, unsigned int *data);
277 static int pci20006_insn_write(struct comedi_device *dev,
278 struct comedi_subdevice *s,
279 struct comedi_insn *insn, unsigned int *data);
280
281 static const struct comedi_lrange *pci20006_range_list[] = {
282 &range_bipolar10,
283 &range_unipolar10,
284 &range_bipolar5,
285 };
286
287 static int pci20006_init(struct comedi_device *dev, struct comedi_subdevice *s,
288 int opt0, int opt1)
289 {
290 union pci20xxx_subdev_private *sdp = s->private;
291
292 if (opt0 < 0 || opt0 > 2)
293 opt0 = 0;
294 if (opt1 < 0 || opt1 > 2)
295 opt1 = 0;
296
297 sdp->pci20006.ao_range_list[0] = pci20006_range_list[opt0];
298 sdp->pci20006.ao_range_list[1] = pci20006_range_list[opt1];
299
300 /* ao subdevice */
301 s->type = COMEDI_SUBD_AO;
302 s->subdev_flags = SDF_WRITABLE;
303 s->n_chan = 2;
304 s->len_chanlist = 2;
305 s->insn_read = pci20006_insn_read;
306 s->insn_write = pci20006_insn_write;
307 s->maxdata = 0xffff;
308 s->range_table_list = sdp->pci20006.ao_range_list;
309 return 0;
310 }
311
312 static int pci20006_insn_read(struct comedi_device *dev,
313 struct comedi_subdevice *s,
314 struct comedi_insn *insn, unsigned int *data)
315 {
316 union pci20xxx_subdev_private *sdp = s->private;
317
318 data[0] = sdp->pci20006.last_data[CR_CHAN(insn->chanspec)];
319
320 return 1;
321 }
322
323 static int pci20006_insn_write(struct comedi_device *dev,
324 struct comedi_subdevice *s,
325 struct comedi_insn *insn, unsigned int *data)
326 {
327 union pci20xxx_subdev_private *sdp = s->private;
328 int hi, lo;
329 unsigned int boarddata;
330
331 sdp->pci20006.last_data[CR_CHAN(insn->chanspec)] = data[0];
332 boarddata = (((unsigned int)data[0] + 0x8000) & 0xffff);
333 /* comedi-data -> board-data */
334 lo = (boarddata & 0xff);
335 hi = ((boarddata >> 8) & 0xff);
336
337 switch (CR_CHAN(insn->chanspec)) {
338 case 0:
339 writeb(lo, sdp->iobase + PCI20006_LCHAN0);
340 writeb(hi, sdp->iobase + PCI20006_LCHAN0 + 1);
341 writeb(0x00, sdp->iobase + PCI20006_STROBE0);
342 break;
343 case 1:
344 writeb(lo, sdp->iobase + PCI20006_LCHAN1);
345 writeb(hi, sdp->iobase + PCI20006_LCHAN1 + 1);
346 writeb(0x00, sdp->iobase + PCI20006_STROBE1);
347 break;
348 default:
349 printk(KERN_WARNING
350 " comedi%d: pci20xxx: ao channel Error!\n", dev->minor);
351 return -EINVAL;
352 }
353
354 return 1;
355 }
356
357 /* PCI20341M */
358
359 static int pci20341_insn_read(struct comedi_device *dev,
360 struct comedi_subdevice *s,
361 struct comedi_insn *insn, unsigned int *data);
362
363 static const int pci20341_timebase[] = { 0x00, 0x00, 0x00, 0x04 };
364 static const int pci20341_settling_time[] = { 0x58, 0x58, 0x93, 0x99 };
365
366 static const struct comedi_lrange range_bipolar0_5 = {
367 1,
368 {BIP_RANGE(0.5)}
369 };
370
371 static const struct comedi_lrange range_bipolar0_05 = {
372 1,
373 {BIP_RANGE(0.05)}
374 };
375
376 static const struct comedi_lrange range_bipolar0_025 = {
377 1,
378 {BIP_RANGE(0.025)}
379 };
380
381 static const struct comedi_lrange *const pci20341_ranges[] = {
382 &range_bipolar5,
383 &range_bipolar0_5,
384 &range_bipolar0_05,
385 &range_bipolar0_025,
386 };
387
388 static int pci20341_init(struct comedi_device *dev, struct comedi_subdevice *s,
389 int opt0, int opt1)
390 {
391 union pci20xxx_subdev_private *sdp = s->private;
392 int option;
393
394 /* options handling */
395 if (opt0 < 0 || opt0 > 3)
396 opt0 = 0;
397 sdp->pci20341.timebase = pci20341_timebase[opt0];
398 sdp->pci20341.settling_time = pci20341_settling_time[opt0];
399
400 /* ai subdevice */
401 s->type = COMEDI_SUBD_AI;
402 s->subdev_flags = SDF_READABLE;
403 s->n_chan = PCI20341_CHAN_NR;
404 s->len_chanlist = PCI20341_SCANLIST;
405 s->insn_read = pci20341_insn_read;
406 s->maxdata = 0xffff;
407 s->range_table = pci20341_ranges[opt0];
408
409 /* depends on gain, trigger, repetition mode */
410 option = sdp->pci20341.timebase | PCI20341_REPMODE;
411
412 /* initialize Module */
413 writeb(PCI20341_INIT, sdp->iobase + PCI20341_CONFIG_REG);
414 /* set Pacer */
415 writeb(PCI20341_PACER, sdp->iobase + PCI20341_MOD_STATUS);
416 /* option register */
417 writeb(option, sdp->iobase + PCI20341_OPT_REG);
418 /* settling time counter */
419 writeb(sdp->pci20341.settling_time,
420 sdp->iobase + PCI20341_SET_TIME_REG);
421 /* trigger not implemented */
422 return 0;
423 }
424
425 static int pci20341_insn_read(struct comedi_device *dev,
426 struct comedi_subdevice *s,
427 struct comedi_insn *insn, unsigned int *data)
428 {
429 union pci20xxx_subdev_private *sdp = s->private;
430 unsigned int i = 0, j = 0;
431 int lo, hi;
432 unsigned char eoc; /* end of conversion */
433 unsigned int clb; /* channel list byte */
434 unsigned int boarddata;
435
436 /* write number of input channels */
437 writeb(1, sdp->iobase + PCI20341_LCHAN_ADDR_REG);
438 clb = PCI20341_DAISY_CHAIN | PCI20341_MUX | (sdp->pci20341.ai_gain << 3)
439 | CR_CHAN(insn->chanspec);
440 writeb(clb, sdp->iobase + PCI20341_CHAN_LIST);
441
442 /* reset settling time counter and trigger delay counter */
443 writeb(0x00, sdp->iobase + PCI20341_CC_RESET);
444
445 writeb(0x00, sdp->iobase + PCI20341_CHAN_RESET);
446
447 /* generate Pacer */
448
449 for (i = 0; i < insn->n; i++) {
450 /* data polling isn't the niciest way to get the data, I know,
451 * but there are only 6 cycles (mean) and it is easier than
452 * the whole interrupt stuff
453 */
454 j = 0;
455 /* generate Pacer */
456 readb(sdp->iobase + PCI20341_SOFT_PACER);
457
458 eoc = readb(sdp->iobase + PCI20341_STATUS_REG);
459 /* poll Interrupt Flag */
460 while ((eoc < 0x80) && j < 100) {
461 j++;
462 eoc = readb(sdp->iobase + PCI20341_STATUS_REG);
463 }
464 if (j >= 100) {
465 printk(KERN_WARNING
466 "comedi%d: pci20xxx: "
467 "AI interrupt channel %i polling exit !\n",
468 dev->minor, i);
469 return -EINVAL;
470 }
471 lo = readb(sdp->iobase + PCI20341_LDATA);
472 hi = readb(sdp->iobase + PCI20341_LDATA + 1);
473 boarddata = lo + 0x100 * hi;
474
475 /* board-data -> comedi-data */
476 data[i] = (short)((boarddata + 0x8000) & 0xffff);
477 }
478
479 return i;
480 }
481
482 /* native DIO */
483
484 static void pci20xxx_dio_config(struct comedi_device *dev,
485 struct comedi_subdevice *s);
486 static int pci20xxx_dio_insn_bits(struct comedi_device *dev,
487 struct comedi_subdevice *s,
488 struct comedi_insn *insn, unsigned int *data);
489 static int pci20xxx_dio_insn_config(struct comedi_device *dev,
490 struct comedi_subdevice *s,
491 struct comedi_insn *insn,
492 unsigned int *data);
493
494 /* initialize struct pci20xxx_private */
495 static int pci20xxx_dio_init(struct comedi_device *dev,
496 struct comedi_subdevice *s)
497 {
498
499 s->type = COMEDI_SUBD_DIO;
500 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
501 s->n_chan = 32;
502 s->insn_bits = pci20xxx_dio_insn_bits;
503 s->insn_config = pci20xxx_dio_insn_config;
504 s->maxdata = 1;
505 s->len_chanlist = 32;
506 s->range_table = &range_digital;
507 s->io_bits = 0;
508
509 /* digital I/O lines default to input on board reset. */
510 pci20xxx_dio_config(dev, s);
511
512 return 0;
513 }
514
515 static int pci20xxx_dio_insn_config(struct comedi_device *dev,
516 struct comedi_subdevice *s,
517 struct comedi_insn *insn,
518 unsigned int *data)
519 {
520 int mask, bits;
521
522 mask = 1 << CR_CHAN(insn->chanspec);
523 if (mask & 0x000000ff)
524 bits = 0x000000ff;
525 else if (mask & 0x0000ff00)
526 bits = 0x0000ff00;
527 else if (mask & 0x00ff0000)
528 bits = 0x00ff0000;
529 else
530 bits = 0xff000000;
531 if (data[0])
532 s->io_bits |= bits;
533 else
534 s->io_bits &= ~bits;
535 pci20xxx_dio_config(dev, s);
536
537 return 1;
538 }
539
540 static int pci20xxx_dio_insn_bits(struct comedi_device *dev,
541 struct comedi_subdevice *s,
542 struct comedi_insn *insn, unsigned int *data)
543 {
544 unsigned int mask = data[0];
545
546 s->state &= ~mask;
547 s->state |= (mask & data[1]);
548
549 mask &= s->io_bits;
550 if (mask & 0x000000ff)
551 writeb((s->state >> 0) & 0xff,
552 devpriv->ioaddr + PCI20000_DIO_0);
553 if (mask & 0x0000ff00)
554 writeb((s->state >> 8) & 0xff,
555 devpriv->ioaddr + PCI20000_DIO_1);
556 if (mask & 0x00ff0000)
557 writeb((s->state >> 16) & 0xff,
558 devpriv->ioaddr + PCI20000_DIO_2);
559 if (mask & 0xff000000)
560 writeb((s->state >> 24) & 0xff,
561 devpriv->ioaddr + PCI20000_DIO_3);
562
563 data[1] = readb(devpriv->ioaddr + PCI20000_DIO_0);
564 data[1] |= readb(devpriv->ioaddr + PCI20000_DIO_1) << 8;
565 data[1] |= readb(devpriv->ioaddr + PCI20000_DIO_2) << 16;
566 data[1] |= readb(devpriv->ioaddr + PCI20000_DIO_3) << 24;
567
568 return insn->n;
569 }
570
571 static void pci20xxx_dio_config(struct comedi_device *dev,
572 struct comedi_subdevice *s)
573 {
574 unsigned char control_01;
575 unsigned char control_23;
576 unsigned char buffer;
577
578 control_01 = readb(devpriv->ioaddr + PCI20000_DIO_CONTROL_01);
579 control_23 = readb(devpriv->ioaddr + PCI20000_DIO_CONTROL_23);
580 buffer = readb(devpriv->ioaddr + PCI20000_DIO_BUFFER);
581
582 if (s->io_bits & 0x000000ff) {
583 /* output port 0 */
584 control_01 &= PCI20000_DIO_EOC;
585 buffer = (buffer & (~(DIO_BE << DIO_PS_0))) | (DIO_BO <<
586 DIO_PS_0);
587 } else {
588 /* input port 0 */
589 control_01 = (control_01 & DIO_CAND) | PCI20000_DIO_EIC;
590 buffer = (buffer & (~(DIO_BI << DIO_PS_0)));
591 }
592 if (s->io_bits & 0x0000ff00) {
593 /* output port 1 */
594 control_01 &= PCI20000_DIO_OOC;
595 buffer = (buffer & (~(DIO_BE << DIO_PS_1))) | (DIO_BO <<
596 DIO_PS_1);
597 } else {
598 /* input port 1 */
599 control_01 = (control_01 & DIO_CAND) | PCI20000_DIO_OIC;
600 buffer = (buffer & (~(DIO_BI << DIO_PS_1)));
601 }
602 if (s->io_bits & 0x00ff0000) {
603 /* output port 2 */
604 control_23 &= PCI20000_DIO_EOC;
605 buffer = (buffer & (~(DIO_BE << DIO_PS_2))) | (DIO_BO <<
606 DIO_PS_2);
607 } else {
608 /* input port 2 */
609 control_23 = (control_23 & DIO_CAND) | PCI20000_DIO_EIC;
610 buffer = (buffer & (~(DIO_BI << DIO_PS_2)));
611 }
612 if (s->io_bits & 0xff000000) {
613 /* output port 3 */
614 control_23 &= PCI20000_DIO_OOC;
615 buffer = (buffer & (~(DIO_BE << DIO_PS_3))) | (DIO_BO <<
616 DIO_PS_3);
617 } else {
618 /* input port 3 */
619 control_23 = (control_23 & DIO_CAND) | PCI20000_DIO_OIC;
620 buffer = (buffer & (~(DIO_BI << DIO_PS_3)));
621 }
622 writeb(control_01, devpriv->ioaddr + PCI20000_DIO_CONTROL_01);
623 writeb(control_23, devpriv->ioaddr + PCI20000_DIO_CONTROL_23);
624 writeb(buffer, devpriv->ioaddr + PCI20000_DIO_BUFFER);
625 }
626
627 #if 0
628 static void pci20xxx_do(struct comedi_device *dev, struct comedi_subdevice *s)
629 {
630 /* XXX if the channel is configured for input, does this
631 do bad things? */
632 /* XXX it would be a good idea to only update the registers
633 that _need_ to be updated. This requires changes to
634 comedi, however. */
635 writeb((s->state >> 0) & 0xff, devpriv->ioaddr + PCI20000_DIO_0);
636 writeb((s->state >> 8) & 0xff, devpriv->ioaddr + PCI20000_DIO_1);
637 writeb((s->state >> 16) & 0xff, devpriv->ioaddr + PCI20000_DIO_2);
638 writeb((s->state >> 24) & 0xff, devpriv->ioaddr + PCI20000_DIO_3);
639 }
640
641 static unsigned int pci20xxx_di(struct comedi_device *dev,
642 struct comedi_subdevice *s)
643 {
644 /* XXX same note as above */
645 unsigned int bits;
646
647 bits = readb(devpriv->ioaddr + PCI20000_DIO_0);
648 bits |= readb(devpriv->ioaddr + PCI20000_DIO_1) << 8;
649 bits |= readb(devpriv->ioaddr + PCI20000_DIO_2) << 16;
650 bits |= readb(devpriv->ioaddr + PCI20000_DIO_3) << 24;
651
652 return bits;
653 }
654 #endif
655
656 static struct comedi_driver pci20xxx_driver = {
657 .driver_name = "ii_pci20kc",
658 .module = THIS_MODULE,
659 .attach = pci20xxx_attach,
660 .detach = pci20xxx_detach,
661 };
662 module_comedi_driver(pci20xxx_driver);
663
664 MODULE_AUTHOR("Comedi http://www.comedi.org");
665 MODULE_DESCRIPTION("Comedi low-level driver");
666 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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