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, {
107 static const struct comedi_lrange range_rti800_ai_5_bipolar = { 4, {
114 static const struct comedi_lrange range_rti800_ai_unipolar = { 4, {
122 struct rti800_board {
128 static const struct rti800_board boardtypes[] = {
133 #define this_board ((const struct rti800_board *)dev->board_ptr)
135 static int rti800_attach(struct comedi_device *dev, struct comedi_devconfig *it);
136 static int rti800_detach(struct comedi_device *dev);
137 static struct comedi_driver driver_rti800 = {
138 .driver_name = "rti800",
139 .module = THIS_MODULE,
140 .attach = rti800_attach,
141 .detach = rti800_detach,
142 .num_names = ARRAY_SIZE(boardtypes),
143 .board_name = &boardtypes[0].name,
144 .offset = sizeof(struct rti800_board),
147 COMEDI_INITCLEANUP(driver_rti800);
149 static irqreturn_t rti800_interrupt(int irq, void *dev);
151 struct rti800_private {
153 adc_diff, adc_pseudodiff, adc_singleended
156 adc_bipolar10, adc_bipolar5, adc_unipolar10
159 adc_2comp, adc_straight
162 dac_bipolar10, dac_unipolar10
163 } dac0_range, dac1_range;
165 dac_2comp, dac_straight
166 } dac0_coding, dac1_coding;
167 const struct comedi_lrange *ao_range_type_list[2];
168 unsigned int ao_readback[2];
172 #define devpriv ((struct rti800_private *)dev->private)
174 #define RTI800_TIMEOUT 100
176 static irqreturn_t rti800_interrupt(int irq, void *dev)
181 /* settling delay times in usec for different gains */
182 static const int gaindelay[] = { 10, 20, 40, 80 };
184 static int rti800_ai_insn_read(struct comedi_device *dev, struct comedi_subdevice *s,
185 struct comedi_insn *insn, unsigned int *data)
189 int chan = CR_CHAN(insn->chanspec);
190 unsigned gain = CR_RANGE(insn->chanspec);
191 unsigned muxgain_bits;
193 inb(dev->iobase + RTI800_ADCHI);
194 outb(0, dev->iobase + RTI800_CLRFLAGS);
196 muxgain_bits = chan | (gain << 5);
197 if (muxgain_bits != devpriv->muxgain_bits) {
198 devpriv->muxgain_bits = muxgain_bits;
199 outb(devpriv->muxgain_bits, dev->iobase + RTI800_MUXGAIN);
200 /* without a delay here, the RTI_OVERRUN bit
201 * gets set, and you will have an error. */
203 BUG_ON(gain >= ARRAY_SIZE(gaindelay));
204 udelay(gaindelay[gain]);
208 for (i = 0; i < insn->n; i++) {
209 outb(0, dev->iobase + RTI800_CONVERT);
210 for (t = RTI800_TIMEOUT; t; t--) {
211 status = inb(dev->iobase + RTI800_CSR);
212 if (status & RTI800_OVERRUN) {
213 printk("rti800: a/d overrun\n");
214 outb(0, dev->iobase + RTI800_CLRFLAGS);
217 if (status & RTI800_DONE)
222 printk("rti800: timeout\n");
225 data[i] = inb(dev->iobase + RTI800_ADCLO);
226 data[i] |= (0xf & inb(dev->iobase + RTI800_ADCHI)) << 8;
228 if (devpriv->adc_coding == adc_2comp) {
236 static int rti800_ao_insn_read(struct comedi_device *dev, struct comedi_subdevice *s,
237 struct comedi_insn *insn, unsigned int *data)
240 int chan = CR_CHAN(insn->chanspec);
242 for (i = 0; i < insn->n; i++)
243 data[i] = devpriv->ao_readback[chan];
248 static int rti800_ao_insn_write(struct comedi_device *dev, struct comedi_subdevice *s,
249 struct comedi_insn *insn, unsigned int *data)
251 int chan = CR_CHAN(insn->chanspec);
255 for (i = 0; i < insn->n; i++) {
256 devpriv->ao_readback[chan] = d = data[i];
257 if (devpriv->dac0_coding == dac_2comp) {
261 dev->iobase + (chan ? RTI800_DAC1LO : RTI800_DAC0LO));
263 dev->iobase + (chan ? RTI800_DAC1HI : RTI800_DAC0HI));
268 static int rti800_di_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s,
269 struct comedi_insn *insn, unsigned int *data)
273 data[1] = inb(dev->iobase + RTI800_DI);
277 static int rti800_do_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s,
278 struct comedi_insn *insn, unsigned int *data)
284 s->state &= ~data[0];
285 s->state |= data[0] & data[1];
286 /* Outputs are inverted... */
287 outb(s->state ^ 0xff, dev->iobase + RTI800_DO);
296 options[0] - I/O port
299 0=differential, 1=pseudodiff, 2=single
300 options[3] - a/d range
301 0=bipolar10, 1=bipolar5, 2=unipolar10
302 options[4] - a/d coding
303 0=2's comp, 1=straight binary
304 options[5] - dac0 range
305 0=bipolar10, 1=unipolar10
306 options[6] - dac0 coding
307 0=2's comp, 1=straight binary
308 options[7] - dac1 range
309 options[8] - dac1 coding
312 static int rti800_attach(struct comedi_device *dev, struct comedi_devconfig *it)
315 unsigned long iobase;
317 struct comedi_subdevice *s;
319 iobase = it->options[0];
320 printk("comedi%d: rti800: 0x%04lx ", dev->minor, iobase);
321 if (!request_region(iobase, RTI800_SIZE, "rti800")) {
322 printk("I/O port conflict\n");
325 dev->iobase = iobase;
328 printk("fingerprint=%x,%x,%x,%x,%x ",
329 inb(dev->iobase + 0),
330 inb(dev->iobase + 1),
331 inb(dev->iobase + 2),
332 inb(dev->iobase + 3), inb(dev->iobase + 4));
335 outb(0, dev->iobase + RTI800_CSR);
336 inb(dev->iobase + RTI800_ADCHI);
337 outb(0, dev->iobase + RTI800_CLRFLAGS);
339 irq = it->options[1];
341 printk("( irq = %u )", irq);
342 ret = request_irq(irq, rti800_interrupt, 0, "rti800", dev);
344 printk(" Failed to allocate IRQ\n");
349 printk("( no irq )");
352 dev->board_name = this_board->name;
354 ret = alloc_subdevices(dev, 4);
358 ret = alloc_private(dev, sizeof(struct rti800_private));
362 devpriv->adc_mux = it->options[2];
363 devpriv->adc_range = it->options[3];
364 devpriv->adc_coding = it->options[4];
365 devpriv->dac0_range = it->options[5];
366 devpriv->dac0_coding = it->options[6];
367 devpriv->dac1_range = it->options[7];
368 devpriv->dac1_coding = it->options[8];
369 devpriv->muxgain_bits = -1;
371 s = dev->subdevices + 0;
373 s->type = COMEDI_SUBD_AI;
374 s->subdev_flags = SDF_READABLE | SDF_GROUND;
375 s->n_chan = (devpriv->adc_mux ? 16 : 8);
376 s->insn_read = rti800_ai_insn_read;
378 switch (devpriv->adc_range) {
380 s->range_table = &range_rti800_ai_10_bipolar;
383 s->range_table = &range_rti800_ai_5_bipolar;
386 s->range_table = &range_rti800_ai_unipolar;
391 if (this_board->has_ao) {
392 /* ao subdevice (only on rti815) */
393 s->type = COMEDI_SUBD_AO;
394 s->subdev_flags = SDF_WRITABLE;
396 s->insn_read = rti800_ao_insn_read;
397 s->insn_write = rti800_ao_insn_write;
399 s->range_table_list = devpriv->ao_range_type_list;
400 switch (devpriv->dac0_range) {
402 devpriv->ao_range_type_list[0] = &range_bipolar10;
405 devpriv->ao_range_type_list[0] = &range_unipolar10;
408 switch (devpriv->dac1_range) {
410 devpriv->ao_range_type_list[1] = &range_bipolar10;
413 devpriv->ao_range_type_list[1] = &range_unipolar10;
417 s->type = COMEDI_SUBD_UNUSED;
422 s->type = COMEDI_SUBD_DI;
423 s->subdev_flags = SDF_READABLE;
425 s->insn_bits = rti800_di_insn_bits;
427 s->range_table = &range_digital;
431 s->type = COMEDI_SUBD_DO;
432 s->subdev_flags = SDF_WRITABLE;
434 s->insn_bits = rti800_do_insn_bits;
436 s->range_table = &range_digital;
438 /* don't yet know how to deal with counter/timers */
442 s->type = COMEDI_SUBD_TIMER;
450 static int rti800_detach(struct comedi_device *dev)
452 printk("comedi%d: rti800: remove\n", dev->minor);
455 release_region(dev->iobase, RTI800_SIZE);
458 free_irq(dev->irq, dev);