2 * comedi/drivers/das08.c
3 * comedi module for common DAS08 support (used by ISA/PCI/PCMCIA drivers)
5 * COMEDI - Linux Control and Measurement Device Interface
6 * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
7 * Copyright (C) 2001,2002,2003 Frank Mori Hess <fmhess@users.sourceforge.net>
8 * Copyright (C) 2004 Salvador E. Tropea <set@users.sf.net> <set@ieee.org>
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.
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.
21 #include <linux/module.h>
23 #include "../comedidev.h"
26 #include "comedi_8254.h"
34 0 a/d bits 0-3 start 8 bit
35 1 a/d bits 4-11 start 12 bit
36 2 eoc, ip1-3, irq, mux op1-4, inte, mux
41 requires hard-wiring for async ai
46 * Data format of DAS08_AI_LSB_REG and DAS08_AI_MSB_REG depends on
47 * 'ai_encoding' member of board structure:
49 * das08_encode12 : DATA[11..4] = MSB[7..0], DATA[3..0] = LSB[7..4].
50 * das08_pcm_encode12 : DATA[11..8] = MSB[3..0], DATA[7..9] = LSB[7..0].
51 * das08_encode16 : SIGN = MSB[7], MAGNITUDE[14..8] = MSB[6..0],
52 * MAGNITUDE[7..0] = LSB[7..0].
53 * SIGN==0 for negative input, SIGN==1 for positive input.
54 * Note: when read a second time after conversion
55 * complete, MSB[7] is an "over-range" bit.
57 #define DAS08_AI_LSB_REG 0x00 /* (R) AI least significant bits */
58 #define DAS08_AI_MSB_REG 0x01 /* (R) AI most significant bits */
59 #define DAS08_AI_TRIG_REG 0x01 /* (W) AI software trigger */
60 #define DAS08_STATUS_REG 0x02 /* (R) status */
61 #define DAS08_STATUS_AI_BUSY BIT(7) /* AI conversion in progress */
62 #define DAS08_IRQ (1<<3)
63 #define DAS08_IP(x) (((x)>>4)&0x7)
64 #define DAS08_CONTROL 2
65 #define DAS08_MUX_MASK 0x7
66 #define DAS08_MUX(x) ((x) & DAS08_MUX_MASK)
67 #define DAS08_INTE (1<<3)
68 #define DAS08_DO_MASK 0xf0
69 #define DAS08_OP(x) (((x) << 4) & DAS08_DO_MASK)
77 1 a/d bits 4-11 start 12 bit
88 #define DAS08JR_AO_LSB(x) ((x) ? 6 : 4)
89 #define DAS08JR_AO_MSB(x) ((x) ? 7 : 5)
98 0 a/d bits 0-3 start 8 bit
99 1 a/d bits 4-11 start 12 bit
100 2 eoc, ip1-3, irq, mux op1-4, inte, mux
101 3 mux, gain status gain control
111 #define DAS08AO_GAIN_CONTROL 3
112 #define DAS08AO_GAIN_STATUS 3
114 #define DAS08AO_AO_LSB(x) ((x) ? 0xa : 8)
115 #define DAS08AO_AO_MSB(x) ((x) ? 0xb : 9)
116 #define DAS08AO_AO_UPDATE 8
118 /* gainlist same as _pgx_ below */
120 static const struct comedi_lrange range_das08_pgl = {
134 static const struct comedi_lrange range_das08_pgh = {
151 static const struct comedi_lrange range_das08_pgm = {
168 0 a/d bits 0-3 unused
169 1 a/d bits 4-11 start 12 bit
179 static const struct comedi_lrange *const das08_ai_lranges[] = {
180 [das08_pg_none] = &range_unknown,
181 [das08_bipolar5] = &range_bipolar5,
182 [das08_pgh] = &range_das08_pgh,
183 [das08_pgl] = &range_das08_pgl,
184 [das08_pgm] = &range_das08_pgm,
187 static const int das08_pgh_gainlist[] = {
188 8, 0, 10, 2, 12, 4, 14, 6, 1, 3, 5, 7
190 static const int das08_pgl_gainlist[] = { 8, 0, 2, 4, 6, 1, 3, 5, 7 };
191 static const int das08_pgm_gainlist[] = { 8, 0, 10, 12, 14, 9, 11, 13, 15 };
193 static const int *const das08_gainlists[] = {
194 [das08_pg_none] = NULL,
195 [das08_bipolar5] = NULL,
196 [das08_pgh] = das08_pgh_gainlist,
197 [das08_pgl] = das08_pgl_gainlist,
198 [das08_pgm] = das08_pgm_gainlist,
201 static int das08_ai_eoc(struct comedi_device *dev,
202 struct comedi_subdevice *s,
203 struct comedi_insn *insn,
204 unsigned long context)
208 status = inb(dev->iobase + DAS08_STATUS_REG);
209 if ((status & DAS08_STATUS_AI_BUSY) == 0)
214 static int das08_ai_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
215 struct comedi_insn *insn, unsigned int *data)
217 const struct das08_board_struct *thisboard = dev->board_ptr;
218 struct das08_private_struct *devpriv = dev->private;
225 chan = CR_CHAN(insn->chanspec);
226 range = CR_RANGE(insn->chanspec);
229 inb(dev->iobase + DAS08_AI_LSB_REG);
230 inb(dev->iobase + DAS08_AI_MSB_REG);
232 /* set multiplexer */
233 /* lock to prevent race with digital output */
234 spin_lock(&dev->spinlock);
235 devpriv->do_mux_bits &= ~DAS08_MUX_MASK;
236 devpriv->do_mux_bits |= DAS08_MUX(chan);
237 outb(devpriv->do_mux_bits, dev->iobase + DAS08_CONTROL);
238 spin_unlock(&dev->spinlock);
240 if (devpriv->pg_gainlist) {
242 range = CR_RANGE(insn->chanspec);
243 outb(devpriv->pg_gainlist[range],
244 dev->iobase + DAS08AO_GAIN_CONTROL);
247 for (n = 0; n < insn->n; n++) {
248 /* clear over-range bits for 16-bit boards */
249 if (thisboard->ai_nbits == 16)
250 if (inb(dev->iobase + DAS08_AI_MSB_REG) & 0x80)
251 dev_info(dev->class_dev, "over-range\n");
253 /* trigger conversion */
254 outb_p(0, dev->iobase + DAS08_AI_TRIG_REG);
256 ret = comedi_timeout(dev, s, insn, das08_ai_eoc, 0);
260 msb = inb(dev->iobase + DAS08_AI_MSB_REG);
261 lsb = inb(dev->iobase + DAS08_AI_LSB_REG);
262 if (thisboard->ai_encoding == das08_encode12) {
263 data[n] = (lsb >> 4) | (msb << 4);
264 } else if (thisboard->ai_encoding == das08_pcm_encode12) {
265 data[n] = (msb << 8) + lsb;
266 } else if (thisboard->ai_encoding == das08_encode16) {
267 /* FPOS 16-bit boards are sign-magnitude */
269 data[n] = (1 << 15) | lsb | ((msb & 0x7f) << 8);
271 data[n] = (1 << 15) - (lsb | (msb & 0x7f) << 8);
273 dev_err(dev->class_dev, "bug! unknown ai encoding\n");
281 static int das08_di_rbits(struct comedi_device *dev, struct comedi_subdevice *s,
282 struct comedi_insn *insn, unsigned int *data)
285 data[1] = DAS08_IP(inb(dev->iobase + DAS08_STATUS_REG));
290 static int das08_do_wbits(struct comedi_device *dev,
291 struct comedi_subdevice *s,
292 struct comedi_insn *insn,
295 struct das08_private_struct *devpriv = dev->private;
297 if (comedi_dio_update_state(s, data)) {
298 /* prevent race with setting of analog input mux */
299 spin_lock(&dev->spinlock);
300 devpriv->do_mux_bits &= ~DAS08_DO_MASK;
301 devpriv->do_mux_bits |= DAS08_OP(s->state);
302 outb(devpriv->do_mux_bits, dev->iobase + DAS08_CONTROL);
303 spin_unlock(&dev->spinlock);
311 static int das08jr_di_rbits(struct comedi_device *dev,
312 struct comedi_subdevice *s,
313 struct comedi_insn *insn, unsigned int *data)
316 data[1] = inb(dev->iobase + DAS08JR_DIO);
321 static int das08jr_do_wbits(struct comedi_device *dev,
322 struct comedi_subdevice *s,
323 struct comedi_insn *insn,
326 if (comedi_dio_update_state(s, data))
327 outb(s->state, dev->iobase + DAS08JR_DIO);
334 static void das08_ao_set_data(struct comedi_device *dev,
335 unsigned int chan, unsigned int data)
337 const struct das08_board_struct *thisboard = dev->board_ptr;
342 msb = (data >> 8) & 0xff;
343 if (thisboard->is_jr) {
344 outb(lsb, dev->iobase + DAS08JR_AO_LSB(chan));
345 outb(msb, dev->iobase + DAS08JR_AO_MSB(chan));
347 inb(dev->iobase + DAS08JR_DIO);
349 outb(lsb, dev->iobase + DAS08AO_AO_LSB(chan));
350 outb(msb, dev->iobase + DAS08AO_AO_MSB(chan));
352 inb(dev->iobase + DAS08AO_AO_UPDATE);
356 static int das08_ao_insn_write(struct comedi_device *dev,
357 struct comedi_subdevice *s,
358 struct comedi_insn *insn,
361 unsigned int chan = CR_CHAN(insn->chanspec);
362 unsigned int val = s->readback[chan];
365 for (i = 0; i < insn->n; i++) {
367 das08_ao_set_data(dev, chan, val);
369 s->readback[chan] = val;
374 int das08_common_attach(struct comedi_device *dev, unsigned long iobase)
376 const struct das08_board_struct *thisboard = dev->board_ptr;
377 struct das08_private_struct *devpriv = dev->private;
378 struct comedi_subdevice *s;
382 dev->iobase = iobase;
384 dev->board_name = thisboard->name;
386 ret = comedi_alloc_subdevices(dev, 6);
390 s = &dev->subdevices[0];
392 if (thisboard->ai_nbits) {
393 s->type = COMEDI_SUBD_AI;
394 /* XXX some boards actually have differential
395 * inputs instead of single ended.
396 * The driver does nothing with arefs though,
397 * so it's no big deal.
399 s->subdev_flags = SDF_READABLE | SDF_GROUND;
401 s->maxdata = (1 << thisboard->ai_nbits) - 1;
402 s->range_table = das08_ai_lranges[thisboard->ai_pg];
403 s->insn_read = das08_ai_rinsn;
404 devpriv->pg_gainlist = das08_gainlists[thisboard->ai_pg];
406 s->type = COMEDI_SUBD_UNUSED;
409 s = &dev->subdevices[1];
411 if (thisboard->ao_nbits) {
412 s->type = COMEDI_SUBD_AO;
413 s->subdev_flags = SDF_WRITABLE;
415 s->maxdata = (1 << thisboard->ao_nbits) - 1;
416 s->range_table = &range_bipolar5;
417 s->insn_write = das08_ao_insn_write;
419 ret = comedi_alloc_subdev_readback(s);
423 /* initialize all channels to 0V */
424 for (i = 0; i < s->n_chan; i++) {
425 s->readback[i] = s->maxdata / 2;
426 das08_ao_set_data(dev, i, s->readback[i]);
429 s->type = COMEDI_SUBD_UNUSED;
432 s = &dev->subdevices[2];
434 if (thisboard->di_nchan) {
435 s->type = COMEDI_SUBD_DI;
436 s->subdev_flags = SDF_READABLE;
437 s->n_chan = thisboard->di_nchan;
439 s->range_table = &range_digital;
441 thisboard->is_jr ? das08jr_di_rbits : das08_di_rbits;
443 s->type = COMEDI_SUBD_UNUSED;
446 s = &dev->subdevices[3];
448 if (thisboard->do_nchan) {
449 s->type = COMEDI_SUBD_DO;
450 s->subdev_flags = SDF_WRITABLE;
451 s->n_chan = thisboard->do_nchan;
453 s->range_table = &range_digital;
455 thisboard->is_jr ? das08jr_do_wbits : das08_do_wbits;
457 s->type = COMEDI_SUBD_UNUSED;
460 s = &dev->subdevices[4];
462 if (thisboard->i8255_offset != 0) {
463 ret = subdev_8255_init(dev, s, NULL, thisboard->i8255_offset);
467 s->type = COMEDI_SUBD_UNUSED;
470 /* Counter subdevice (8254) */
471 s = &dev->subdevices[5];
472 if (thisboard->i8254_offset) {
473 dev->pacer = comedi_8254_init(dev->iobase +
474 thisboard->i8254_offset,
479 comedi_8254_subdevice_init(s, dev->pacer);
481 s->type = COMEDI_SUBD_UNUSED;
486 EXPORT_SYMBOL_GPL(das08_common_attach);
488 static int __init das08_init(void)
492 module_init(das08_init);
494 static void __exit das08_exit(void)
497 module_exit(das08_exit);
499 MODULE_AUTHOR("Comedi http://www.comedi.org");
500 MODULE_DESCRIPTION("Comedi low-level driver");
501 MODULE_LICENSE("GPL");