2 comedi/drivers/rti800.c
3 Hardware driver for Analog Devices RTI-800/815 board
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 1998 David A. Schleef <ds@schleef.org>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 Description: Analog Devices RTI-800/815
28 Updated: Fri, 05 Sep 2008 14:50:44 +0100
29 Devices: [Analog Devices] RTI-800 (rti800), RTI-815 (rti815)
31 Configuration options:
32 [0] - I/O port base address
36 1 = pseudodifferential (common)
51 [7] - DAC 1 range (same as DAC 0)
52 [8] - DAC 1 encoding (same as DAC 0)
55 #include <linux/interrupt.h>
56 #include "../comedidev.h"
58 #include <linux/ioport.h>
60 #define RTI800_SIZE 16
63 #define RTI800_MUXGAIN 1
64 #define RTI800_CONVERT 2
65 #define RTI800_ADCLO 3
66 #define RTI800_ADCHI 4
67 #define RTI800_DAC0LO 5
68 #define RTI800_DAC0HI 6
69 #define RTI800_DAC1LO 7
70 #define RTI800_DAC1HI 8
71 #define RTI800_CLRFLAGS 9
74 #define RTI800_9513A_DATA 12
75 #define RTI800_9513A_CNTRL 13
76 #define RTI800_9513A_STATUS 13
79 * flags for CSR register
82 #define RTI800_BUSY 0x80
83 #define RTI800_DONE 0x40
84 #define RTI800_OVERRUN 0x20
85 #define RTI800_TCR 0x10
86 #define RTI800_DMA_ENAB 0x08
87 #define RTI800_INTR_TC 0x04
88 #define RTI800_INTR_EC 0x02
89 #define RTI800_INTR_OVRN 0x01
91 #define Am9513_8BITBUS
93 #define Am9513_output_control(a) outb(a, dev->iobase+RTI800_9513A_CNTRL)
94 #define Am9513_output_data(a) outb(a, dev->iobase+RTI800_9513A_DATA)
95 #define Am9513_input_data() inb(dev->iobase+RTI800_9513A_DATA)
96 #define Am9513_input_status() inb(dev->iobase+RTI800_9513A_STATUS)
100 static const struct comedi_lrange range_rti800_ai_10_bipolar = { 4, {
112 static const struct comedi_lrange range_rti800_ai_5_bipolar = { 4, {
124 static const struct comedi_lrange range_rti800_ai_unipolar = { 4, {
135 struct rti800_board {
141 static const struct rti800_board boardtypes[] = {
146 #define this_board ((const struct rti800_board *)dev->board_ptr)
148 static int rti800_attach(struct comedi_device *dev,
149 struct comedi_devconfig *it);
150 static int rti800_detach(struct comedi_device *dev);
151 static struct comedi_driver driver_rti800 = {
152 .driver_name = "rti800",
153 .module = THIS_MODULE,
154 .attach = rti800_attach,
155 .detach = rti800_detach,
156 .num_names = ARRAY_SIZE(boardtypes),
157 .board_name = &boardtypes[0].name,
158 .offset = sizeof(struct rti800_board),
161 COMEDI_INITCLEANUP(driver_rti800);
163 static irqreturn_t rti800_interrupt(int irq, void *dev);
165 struct rti800_private {
167 adc_diff, adc_pseudodiff, adc_singleended
170 adc_bipolar10, adc_bipolar5, adc_unipolar10
173 adc_2comp, adc_straight
176 dac_bipolar10, dac_unipolar10
177 } dac0_range, dac1_range;
179 dac_2comp, dac_straight
180 } dac0_coding, dac1_coding;
181 const struct comedi_lrange *ao_range_type_list[2];
182 unsigned int ao_readback[2];
186 #define devpriv ((struct rti800_private *)dev->private)
188 #define RTI800_TIMEOUT 100
190 static irqreturn_t rti800_interrupt(int irq, void *dev)
195 /* settling delay times in usec for different gains */
196 static const int gaindelay[] = { 10, 20, 40, 80 };
198 static int rti800_ai_insn_read(struct comedi_device *dev,
199 struct comedi_subdevice *s,
200 struct comedi_insn *insn, unsigned int *data)
204 int chan = CR_CHAN(insn->chanspec);
205 unsigned gain = CR_RANGE(insn->chanspec);
206 unsigned muxgain_bits;
208 inb(dev->iobase + RTI800_ADCHI);
209 outb(0, dev->iobase + RTI800_CLRFLAGS);
211 muxgain_bits = chan | (gain << 5);
212 if (muxgain_bits != devpriv->muxgain_bits) {
213 devpriv->muxgain_bits = muxgain_bits;
214 outb(devpriv->muxgain_bits, dev->iobase + RTI800_MUXGAIN);
215 /* without a delay here, the RTI_OVERRUN bit
216 * gets set, and you will have an error. */
218 BUG_ON(gain >= ARRAY_SIZE(gaindelay));
219 udelay(gaindelay[gain]);
223 for (i = 0; i < insn->n; i++) {
224 outb(0, dev->iobase + RTI800_CONVERT);
225 for (t = RTI800_TIMEOUT; t; t--) {
226 status = inb(dev->iobase + RTI800_CSR);
227 if (status & RTI800_OVERRUN) {
228 printk("rti800: a/d overrun\n");
229 outb(0, dev->iobase + RTI800_CLRFLAGS);
232 if (status & RTI800_DONE)
237 printk("rti800: timeout\n");
240 data[i] = inb(dev->iobase + RTI800_ADCLO);
241 data[i] |= (0xf & inb(dev->iobase + RTI800_ADCHI)) << 8;
243 if (devpriv->adc_coding == adc_2comp) {
251 static int rti800_ao_insn_read(struct comedi_device *dev,
252 struct comedi_subdevice *s,
253 struct comedi_insn *insn, unsigned int *data)
256 int chan = CR_CHAN(insn->chanspec);
258 for (i = 0; i < insn->n; i++)
259 data[i] = devpriv->ao_readback[chan];
264 static int rti800_ao_insn_write(struct comedi_device *dev,
265 struct comedi_subdevice *s,
266 struct comedi_insn *insn, unsigned int *data)
268 int chan = CR_CHAN(insn->chanspec);
272 for (i = 0; i < insn->n; i++) {
273 devpriv->ao_readback[chan] = d = data[i];
274 if (devpriv->dac0_coding == dac_2comp) {
278 dev->iobase + (chan ? RTI800_DAC1LO : RTI800_DAC0LO));
280 dev->iobase + (chan ? RTI800_DAC1HI : RTI800_DAC0HI));
285 static int rti800_di_insn_bits(struct comedi_device *dev,
286 struct comedi_subdevice *s,
287 struct comedi_insn *insn, unsigned int *data)
291 data[1] = inb(dev->iobase + RTI800_DI);
295 static int rti800_do_insn_bits(struct comedi_device *dev,
296 struct comedi_subdevice *s,
297 struct comedi_insn *insn, unsigned int *data)
303 s->state &= ~data[0];
304 s->state |= data[0] & data[1];
305 /* Outputs are inverted... */
306 outb(s->state ^ 0xff, dev->iobase + RTI800_DO);
315 options[0] - I/O port
318 0=differential, 1=pseudodiff, 2=single
319 options[3] - a/d range
320 0=bipolar10, 1=bipolar5, 2=unipolar10
321 options[4] - a/d coding
322 0=2's comp, 1=straight binary
323 options[5] - dac0 range
324 0=bipolar10, 1=unipolar10
325 options[6] - dac0 coding
326 0=2's comp, 1=straight binary
327 options[7] - dac1 range
328 options[8] - dac1 coding
331 static int rti800_attach(struct comedi_device *dev, struct comedi_devconfig *it)
334 unsigned long iobase;
336 struct comedi_subdevice *s;
338 iobase = it->options[0];
339 printk("comedi%d: rti800: 0x%04lx ", dev->minor, iobase);
340 if (!request_region(iobase, RTI800_SIZE, "rti800")) {
341 printk("I/O port conflict\n");
344 dev->iobase = iobase;
347 printk("fingerprint=%x,%x,%x,%x,%x ",
348 inb(dev->iobase + 0),
349 inb(dev->iobase + 1),
350 inb(dev->iobase + 2),
351 inb(dev->iobase + 3), inb(dev->iobase + 4));
354 outb(0, dev->iobase + RTI800_CSR);
355 inb(dev->iobase + RTI800_ADCHI);
356 outb(0, dev->iobase + RTI800_CLRFLAGS);
358 irq = it->options[1];
360 printk("( irq = %u )", irq);
361 ret = request_irq(irq, rti800_interrupt, 0, "rti800", dev);
363 printk(" Failed to allocate IRQ\n");
368 printk("( no irq )");
371 dev->board_name = this_board->name;
373 ret = alloc_subdevices(dev, 4);
377 ret = alloc_private(dev, sizeof(struct rti800_private));
381 devpriv->adc_mux = it->options[2];
382 devpriv->adc_range = it->options[3];
383 devpriv->adc_coding = it->options[4];
384 devpriv->dac0_range = it->options[5];
385 devpriv->dac0_coding = it->options[6];
386 devpriv->dac1_range = it->options[7];
387 devpriv->dac1_coding = it->options[8];
388 devpriv->muxgain_bits = -1;
390 s = dev->subdevices + 0;
392 s->type = COMEDI_SUBD_AI;
393 s->subdev_flags = SDF_READABLE | SDF_GROUND;
394 s->n_chan = (devpriv->adc_mux ? 16 : 8);
395 s->insn_read = rti800_ai_insn_read;
397 switch (devpriv->adc_range) {
399 s->range_table = &range_rti800_ai_10_bipolar;
402 s->range_table = &range_rti800_ai_5_bipolar;
405 s->range_table = &range_rti800_ai_unipolar;
410 if (this_board->has_ao) {
411 /* ao subdevice (only on rti815) */
412 s->type = COMEDI_SUBD_AO;
413 s->subdev_flags = SDF_WRITABLE;
415 s->insn_read = rti800_ao_insn_read;
416 s->insn_write = rti800_ao_insn_write;
418 s->range_table_list = devpriv->ao_range_type_list;
419 switch (devpriv->dac0_range) {
421 devpriv->ao_range_type_list[0] = &range_bipolar10;
424 devpriv->ao_range_type_list[0] = &range_unipolar10;
427 switch (devpriv->dac1_range) {
429 devpriv->ao_range_type_list[1] = &range_bipolar10;
432 devpriv->ao_range_type_list[1] = &range_unipolar10;
436 s->type = COMEDI_SUBD_UNUSED;
441 s->type = COMEDI_SUBD_DI;
442 s->subdev_flags = SDF_READABLE;
444 s->insn_bits = rti800_di_insn_bits;
446 s->range_table = &range_digital;
450 s->type = COMEDI_SUBD_DO;
451 s->subdev_flags = SDF_WRITABLE;
453 s->insn_bits = rti800_do_insn_bits;
455 s->range_table = &range_digital;
457 /* don't yet know how to deal with counter/timers */
461 s->type = COMEDI_SUBD_TIMER;
469 static int rti800_detach(struct comedi_device *dev)
471 printk("comedi%d: rti800: remove\n", dev->minor);
474 release_region(dev->iobase, RTI800_SIZE);
477 free_irq(dev->irq, dev);