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 static int __init driver_rti800_init_module(void)
163 return comedi_driver_register(&driver_rti800);
166 static void __exit driver_rti800_cleanup_module(void)
168 comedi_driver_unregister(&driver_rti800);
171 module_init(driver_rti800_init_module);
172 module_exit(driver_rti800_cleanup_module);
174 static irqreturn_t rti800_interrupt(int irq, void *dev);
176 struct rti800_private {
178 adc_diff, adc_pseudodiff, adc_singleended
181 adc_bipolar10, adc_bipolar5, adc_unipolar10
184 adc_2comp, adc_straight
187 dac_bipolar10, dac_unipolar10
188 } dac0_range, dac1_range;
190 dac_2comp, dac_straight
191 } dac0_coding, dac1_coding;
192 const struct comedi_lrange *ao_range_type_list[2];
193 unsigned int ao_readback[2];
197 #define devpriv ((struct rti800_private *)dev->private)
199 #define RTI800_TIMEOUT 100
201 static irqreturn_t rti800_interrupt(int irq, void *dev)
206 /* settling delay times in usec for different gains */
207 static const int gaindelay[] = { 10, 20, 40, 80 };
209 static int rti800_ai_insn_read(struct comedi_device *dev,
210 struct comedi_subdevice *s,
211 struct comedi_insn *insn, unsigned int *data)
215 int chan = CR_CHAN(insn->chanspec);
216 unsigned gain = CR_RANGE(insn->chanspec);
217 unsigned muxgain_bits;
219 inb(dev->iobase + RTI800_ADCHI);
220 outb(0, dev->iobase + RTI800_CLRFLAGS);
222 muxgain_bits = chan | (gain << 5);
223 if (muxgain_bits != devpriv->muxgain_bits) {
224 devpriv->muxgain_bits = muxgain_bits;
225 outb(devpriv->muxgain_bits, dev->iobase + RTI800_MUXGAIN);
226 /* without a delay here, the RTI_OVERRUN bit
227 * gets set, and you will have an error. */
229 BUG_ON(gain >= ARRAY_SIZE(gaindelay));
230 udelay(gaindelay[gain]);
234 for (i = 0; i < insn->n; i++) {
235 outb(0, dev->iobase + RTI800_CONVERT);
236 for (t = RTI800_TIMEOUT; t; t--) {
237 status = inb(dev->iobase + RTI800_CSR);
238 if (status & RTI800_OVERRUN) {
239 printk(KERN_WARNING "rti800: a/d overrun\n");
240 outb(0, dev->iobase + RTI800_CLRFLAGS);
243 if (status & RTI800_DONE)
248 printk(KERN_WARNING "rti800: timeout\n");
251 data[i] = inb(dev->iobase + RTI800_ADCLO);
252 data[i] |= (0xf & inb(dev->iobase + RTI800_ADCHI)) << 8;
254 if (devpriv->adc_coding == adc_2comp)
261 static int rti800_ao_insn_read(struct comedi_device *dev,
262 struct comedi_subdevice *s,
263 struct comedi_insn *insn, unsigned int *data)
266 int chan = CR_CHAN(insn->chanspec);
268 for (i = 0; i < insn->n; i++)
269 data[i] = devpriv->ao_readback[chan];
274 static int rti800_ao_insn_write(struct comedi_device *dev,
275 struct comedi_subdevice *s,
276 struct comedi_insn *insn, unsigned int *data)
278 int chan = CR_CHAN(insn->chanspec);
282 for (i = 0; i < insn->n; i++) {
283 devpriv->ao_readback[chan] = d = data[i];
284 if (devpriv->dac0_coding == dac_2comp)
288 dev->iobase + (chan ? RTI800_DAC1LO : RTI800_DAC0LO));
290 dev->iobase + (chan ? RTI800_DAC1HI : RTI800_DAC0HI));
295 static int rti800_di_insn_bits(struct comedi_device *dev,
296 struct comedi_subdevice *s,
297 struct comedi_insn *insn, unsigned int *data)
301 data[1] = inb(dev->iobase + RTI800_DI);
305 static int rti800_do_insn_bits(struct comedi_device *dev,
306 struct comedi_subdevice *s,
307 struct comedi_insn *insn, unsigned int *data)
313 s->state &= ~data[0];
314 s->state |= data[0] & data[1];
315 /* Outputs are inverted... */
316 outb(s->state ^ 0xff, dev->iobase + RTI800_DO);
325 options[0] - I/O port
328 0=differential, 1=pseudodiff, 2=single
329 options[3] - a/d range
330 0=bipolar10, 1=bipolar5, 2=unipolar10
331 options[4] - a/d coding
332 0=2's comp, 1=straight binary
333 options[5] - dac0 range
334 0=bipolar10, 1=unipolar10
335 options[6] - dac0 coding
336 0=2's comp, 1=straight binary
337 options[7] - dac1 range
338 options[8] - dac1 coding
341 static int rti800_attach(struct comedi_device *dev, struct comedi_devconfig *it)
344 unsigned long iobase;
346 struct comedi_subdevice *s;
348 iobase = it->options[0];
349 printk(KERN_INFO "comedi%d: rti800: 0x%04lx\n", dev->minor, iobase);
350 if (!request_region(iobase, RTI800_SIZE, "rti800")) {
351 printk(KERN_WARNING "I/O port conflict\n");
354 dev->iobase = iobase;
357 printk(KERN_DEBUG "fingerprint=%x,%x,%x,%x,%x ",
358 inb(dev->iobase + 0),
359 inb(dev->iobase + 1),
360 inb(dev->iobase + 2),
361 inb(dev->iobase + 3), inb(dev->iobase + 4));
364 outb(0, dev->iobase + RTI800_CSR);
365 inb(dev->iobase + RTI800_ADCHI);
366 outb(0, dev->iobase + RTI800_CLRFLAGS);
368 irq = it->options[1];
370 printk(KERN_INFO "( irq = %u )\n", irq);
371 ret = request_irq(irq, rti800_interrupt, 0, "rti800", dev);
373 printk(KERN_WARNING " Failed to allocate IRQ\n");
378 printk(KERN_INFO "( no irq )\n");
381 dev->board_name = this_board->name;
383 ret = alloc_subdevices(dev, 4);
387 ret = alloc_private(dev, sizeof(struct rti800_private));
391 devpriv->adc_mux = it->options[2];
392 devpriv->adc_range = it->options[3];
393 devpriv->adc_coding = it->options[4];
394 devpriv->dac0_range = it->options[5];
395 devpriv->dac0_coding = it->options[6];
396 devpriv->dac1_range = it->options[7];
397 devpriv->dac1_coding = it->options[8];
398 devpriv->muxgain_bits = -1;
400 s = dev->subdevices + 0;
402 s->type = COMEDI_SUBD_AI;
403 s->subdev_flags = SDF_READABLE | SDF_GROUND;
404 s->n_chan = (devpriv->adc_mux ? 16 : 8);
405 s->insn_read = rti800_ai_insn_read;
407 switch (devpriv->adc_range) {
409 s->range_table = &range_rti800_ai_10_bipolar;
412 s->range_table = &range_rti800_ai_5_bipolar;
415 s->range_table = &range_rti800_ai_unipolar;
420 if (this_board->has_ao) {
421 /* ao subdevice (only on rti815) */
422 s->type = COMEDI_SUBD_AO;
423 s->subdev_flags = SDF_WRITABLE;
425 s->insn_read = rti800_ao_insn_read;
426 s->insn_write = rti800_ao_insn_write;
428 s->range_table_list = devpriv->ao_range_type_list;
429 switch (devpriv->dac0_range) {
431 devpriv->ao_range_type_list[0] = &range_bipolar10;
434 devpriv->ao_range_type_list[0] = &range_unipolar10;
437 switch (devpriv->dac1_range) {
439 devpriv->ao_range_type_list[1] = &range_bipolar10;
442 devpriv->ao_range_type_list[1] = &range_unipolar10;
446 s->type = COMEDI_SUBD_UNUSED;
451 s->type = COMEDI_SUBD_DI;
452 s->subdev_flags = SDF_READABLE;
454 s->insn_bits = rti800_di_insn_bits;
456 s->range_table = &range_digital;
460 s->type = COMEDI_SUBD_DO;
461 s->subdev_flags = SDF_WRITABLE;
463 s->insn_bits = rti800_do_insn_bits;
465 s->range_table = &range_digital;
467 /* don't yet know how to deal with counter/timers */
471 s->type = COMEDI_SUBD_TIMER;
477 static int rti800_detach(struct comedi_device *dev)
479 printk(KERN_INFO "comedi%d: rti800: remove\n", dev->minor);
482 release_region(dev->iobase, RTI800_SIZE);
485 free_irq(dev->irq, dev);
490 MODULE_AUTHOR("Comedi http://www.comedi.org");
491 MODULE_DESCRIPTION("Comedi low-level driver");
492 MODULE_LICENSE("GPL");