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 "../comedidev.h"
57 #include <linux/ioport.h>
59 #define RTI800_SIZE 16
62 #define RTI800_MUXGAIN 1
63 #define RTI800_CONVERT 2
64 #define RTI800_ADCLO 3
65 #define RTI800_ADCHI 4
66 #define RTI800_DAC0LO 5
67 #define RTI800_DAC0HI 6
68 #define RTI800_DAC1LO 7
69 #define RTI800_DAC1HI 8
70 #define RTI800_CLRFLAGS 9
73 #define RTI800_9513A_DATA 12
74 #define RTI800_9513A_CNTRL 13
75 #define RTI800_9513A_STATUS 13
78 * flags for CSR register
81 #define RTI800_BUSY 0x80
82 #define RTI800_DONE 0x40
83 #define RTI800_OVERRUN 0x20
84 #define RTI800_TCR 0x10
85 #define RTI800_DMA_ENAB 0x08
86 #define RTI800_INTR_TC 0x04
87 #define RTI800_INTR_EC 0x02
88 #define RTI800_INTR_OVRN 0x01
90 #define Am9513_8BITBUS
92 #define Am9513_output_control(a) outb(a,dev->iobase+RTI800_9513A_CNTRL)
93 #define Am9513_output_data(a) outb(a,dev->iobase+RTI800_9513A_DATA)
94 #define Am9513_input_data() inb(dev->iobase+RTI800_9513A_DATA)
95 #define Am9513_input_status() inb(dev->iobase+RTI800_9513A_STATUS)
99 static const comedi_lrange range_rti800_ai_10_bipolar = { 4, {
106 static const comedi_lrange range_rti800_ai_5_bipolar = { 4, {
113 static const comedi_lrange range_rti800_ai_unipolar = { 4, {
125 static const boardtype boardtypes[] = {
130 #define this_board ((const boardtype *)dev->board_ptr)
132 static int rti800_attach(comedi_device * dev, comedi_devconfig * it);
133 static int rti800_detach(comedi_device * dev);
134 static comedi_driver driver_rti800 = {
135 driver_name:"rti800",
137 attach:rti800_attach,
138 detach:rti800_detach,
139 num_names:sizeof(boardtypes) / sizeof(boardtype),
140 board_name:&boardtypes[0].name,
141 offset:sizeof(boardtype),
144 COMEDI_INITCLEANUP(driver_rti800);
146 static irqreturn_t rti800_interrupt(int irq, void *dev PT_REGS_ARG);
150 adc_diff, adc_pseudodiff, adc_singleended
153 adc_bipolar10, adc_bipolar5, adc_unipolar10
156 adc_2comp, adc_straight
159 dac_bipolar10, dac_unipolar10
160 } dac0_range, dac1_range;
162 dac_2comp, dac_straight
163 } dac0_coding, dac1_coding;
164 const comedi_lrange *ao_range_type_list[2];
165 lsampl_t ao_readback[2];
169 #define devpriv ((rti800_private *)dev->private)
171 #define RTI800_TIMEOUT 100
173 static irqreturn_t rti800_interrupt(int irq, void *dev PT_REGS_ARG)
178 // settling delay times in usec for different gains
179 static const int gaindelay[] = { 10, 20, 40, 80 };
181 static int rti800_ai_insn_read(comedi_device * dev, comedi_subdevice * s,
182 comedi_insn * insn, lsampl_t * data)
186 int chan = CR_CHAN(insn->chanspec);
187 unsigned gain = CR_RANGE(insn->chanspec);
188 unsigned muxgain_bits;
190 inb(dev->iobase + RTI800_ADCHI);
191 outb(0, dev->iobase + RTI800_CLRFLAGS);
193 muxgain_bits = chan | (gain << 5);
194 if (muxgain_bits != devpriv->muxgain_bits) {
195 devpriv->muxgain_bits = muxgain_bits;
196 outb(devpriv->muxgain_bits, dev->iobase + RTI800_MUXGAIN);
197 /* without a delay here, the RTI_OVERRUN bit
198 * gets set, and you will have an error. */
201 sizeof(gaindelay) / sizeof(gaindelay[0]));
202 comedi_udelay(gaindelay[gain]);
206 for (i = 0; i < insn->n; i++) {
207 outb(0, dev->iobase + RTI800_CONVERT);
208 for (t = RTI800_TIMEOUT; t; t--) {
209 status = inb(dev->iobase + RTI800_CSR);
210 if (status & RTI800_OVERRUN) {
211 rt_printk("rti800: a/d overrun\n");
212 outb(0, dev->iobase + RTI800_CLRFLAGS);
215 if (status & RTI800_DONE)
220 rt_printk("rti800: timeout\n");
223 data[i] = inb(dev->iobase + RTI800_ADCLO);
224 data[i] |= (0xf & inb(dev->iobase + RTI800_ADCHI)) << 8;
226 if (devpriv->adc_coding == adc_2comp) {
234 static int rti800_ao_insn_read(comedi_device * dev, comedi_subdevice * s,
235 comedi_insn * insn, lsampl_t * data)
238 int chan = CR_CHAN(insn->chanspec);
240 for (i = 0; i < insn->n; i++)
241 data[i] = devpriv->ao_readback[chan];
246 static int rti800_ao_insn_write(comedi_device * dev, comedi_subdevice * s,
247 comedi_insn * insn, lsampl_t * data)
249 int chan = CR_CHAN(insn->chanspec);
253 for (i = 0; i < insn->n; i++) {
254 devpriv->ao_readback[chan] = d = data[i];
255 if (devpriv->dac0_coding == dac_2comp) {
259 dev->iobase + (chan ? RTI800_DAC1LO : RTI800_DAC0LO));
261 dev->iobase + (chan ? RTI800_DAC1HI : RTI800_DAC0HI));
266 static int rti800_di_insn_bits(comedi_device * dev, comedi_subdevice * s,
267 comedi_insn * insn, lsampl_t * data)
271 data[1] = inb(dev->iobase + RTI800_DI);
275 static int rti800_do_insn_bits(comedi_device * dev, comedi_subdevice * s,
276 comedi_insn * insn, lsampl_t * data)
282 s->state &= ~data[0];
283 s->state |= data[0] & data[1];
284 /* Outputs are inverted... */
285 outb(s->state ^ 0xff, dev->iobase + RTI800_DO);
294 options[0] - I/O port
297 0=differential, 1=pseudodiff, 2=single
298 options[3] - a/d range
299 0=bipolar10, 1=bipolar5, 2=unipolar10
300 options[4] - a/d coding
301 0=2's comp, 1=straight binary
302 options[5] - dac0 range
303 0=bipolar10, 1=unipolar10
304 options[6] - dac0 coding
305 0=2's comp, 1=straight binary
306 options[7] - dac1 range
307 options[8] - dac1 coding
310 static int rti800_attach(comedi_device * dev, comedi_devconfig * it)
313 unsigned long iobase;
317 iobase = it->options[0];
318 printk("comedi%d: rti800: 0x%04lx ", dev->minor, iobase);
319 if (!request_region(iobase, RTI800_SIZE, "rti800")) {
320 printk("I/O port conflict\n");
323 dev->iobase = iobase;
326 printk("fingerprint=%x,%x,%x,%x,%x ",
327 inb(dev->iobase + 0),
328 inb(dev->iobase + 1),
329 inb(dev->iobase + 2),
330 inb(dev->iobase + 3), inb(dev->iobase + 4));
333 outb(0, dev->iobase + RTI800_CSR);
334 inb(dev->iobase + RTI800_ADCHI);
335 outb(0, dev->iobase + RTI800_CLRFLAGS);
337 irq = it->options[1];
339 printk("( irq = %u )", irq);
340 if ((ret = comedi_request_irq(irq, rti800_interrupt, 0,
341 "rti800", dev)) < 0) {
342 printk(" Failed to allocate IRQ\n");
347 printk("( no irq )");
350 dev->board_name = this_board->name;
352 if ((ret = alloc_subdevices(dev, 4)) < 0)
354 if ((ret = alloc_private(dev, sizeof(rti800_private))) < 0)
357 devpriv->adc_mux = it->options[2];
358 devpriv->adc_range = it->options[3];
359 devpriv->adc_coding = it->options[4];
360 devpriv->dac0_range = it->options[5];
361 devpriv->dac0_coding = it->options[6];
362 devpriv->dac1_range = it->options[7];
363 devpriv->dac1_coding = it->options[8];
364 devpriv->muxgain_bits = -1;
366 s = dev->subdevices + 0;
368 s->type = COMEDI_SUBD_AI;
369 s->subdev_flags = SDF_READABLE | SDF_GROUND;
370 s->n_chan = (devpriv->adc_mux ? 16 : 8);
371 s->insn_read = rti800_ai_insn_read;
373 switch (devpriv->adc_range) {
375 s->range_table = &range_rti800_ai_10_bipolar;
378 s->range_table = &range_rti800_ai_5_bipolar;
381 s->range_table = &range_rti800_ai_unipolar;
386 if (this_board->has_ao) {
387 /* ao subdevice (only on rti815) */
388 s->type = COMEDI_SUBD_AO;
389 s->subdev_flags = SDF_WRITABLE;
391 s->insn_read = rti800_ao_insn_read;
392 s->insn_write = rti800_ao_insn_write;
394 s->range_table_list = devpriv->ao_range_type_list;
395 switch (devpriv->dac0_range) {
397 devpriv->ao_range_type_list[0] = &range_bipolar10;
400 devpriv->ao_range_type_list[0] = &range_unipolar10;
403 switch (devpriv->dac1_range) {
405 devpriv->ao_range_type_list[1] = &range_bipolar10;
408 devpriv->ao_range_type_list[1] = &range_unipolar10;
412 s->type = COMEDI_SUBD_UNUSED;
417 s->type = COMEDI_SUBD_DI;
418 s->subdev_flags = SDF_READABLE;
420 s->insn_bits = rti800_di_insn_bits;
422 s->range_table = &range_digital;
426 s->type = COMEDI_SUBD_DO;
427 s->subdev_flags = SDF_WRITABLE;
429 s->insn_bits = rti800_do_insn_bits;
431 s->range_table = &range_digital;
433 /* don't yet know how to deal with counter/timers */
437 s->type = COMEDI_SUBD_TIMER;
445 static int rti800_detach(comedi_device * dev)
447 printk("comedi%d: rti800: remove\n", dev->minor);
450 release_region(dev->iobase, RTI800_SIZE);
453 comedi_free_irq(dev->irq, dev);