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.
21 * Description: Analog Devices RTI-800/815
22 * Devices: [Analog Devices] RTI-800 (rti800), RTI-815 (rti815)
23 * Author: David A. Schleef <ds@schleef.org>
25 * Updated: Fri, 05 Sep 2008 14:50:44 +0100
27 * Configuration options:
28 * [0] - I/O port base address
29 * [1] - IRQ (not supported / unused)
30 * [2] - A/D mux/reference (number of channels)
32 * 1 = pseudodifferential (common)
39 * 0 = two's complement
44 * [6] - DAC 0 encoding
45 * 0 = two's complement
47 * [7] - DAC 1 range (same as DAC 0)
48 * [8] - DAC 1 encoding (same as DAC 0)
51 #include <linux/module.h>
52 #include <linux/delay.h>
53 #include <linux/interrupt.h>
54 #include "../comedidev.h"
59 #define RTI800_CSR 0x00
60 #define RTI800_CSR_BUSY (1 << 7)
61 #define RTI800_CSR_DONE (1 << 6)
62 #define RTI800_CSR_OVERRUN (1 << 5)
63 #define RTI800_CSR_TCR (1 << 4)
64 #define RTI800_CSR_DMA_ENAB (1 << 3)
65 #define RTI800_CSR_INTR_TC (1 << 2)
66 #define RTI800_CSR_INTR_EC (1 << 1)
67 #define RTI800_CSR_INTR_OVRN (1 << 0)
68 #define RTI800_MUXGAIN 0x01
69 #define RTI800_CONVERT 0x02
70 #define RTI800_ADCLO 0x03
71 #define RTI800_ADCHI 0x04
72 #define RTI800_DAC0LO 0x05
73 #define RTI800_DAC0HI 0x06
74 #define RTI800_DAC1LO 0x07
75 #define RTI800_DAC1HI 0x08
76 #define RTI800_CLRFLAGS 0x09
77 #define RTI800_DI 0x0a
78 #define RTI800_DO 0x0b
79 #define RTI800_9513A_DATA 0x0c
80 #define RTI800_9513A_CNTRL 0x0d
81 #define RTI800_9513A_STATUS 0x0d
83 static const struct comedi_lrange range_rti800_ai_10_bipolar = {
92 static const struct comedi_lrange range_rti800_ai_5_bipolar = {
101 static const struct comedi_lrange range_rti800_ai_unipolar = {
110 static const struct comedi_lrange *const rti800_ai_ranges[] = {
111 &range_rti800_ai_10_bipolar,
112 &range_rti800_ai_5_bipolar,
113 &range_rti800_ai_unipolar,
116 static const struct comedi_lrange *const rti800_ao_ranges[] = {
121 struct rti800_board {
126 static const struct rti800_board rti800_boardtypes[] = {
135 struct rti800_private {
138 const struct comedi_lrange *ao_range_type_list[2];
139 unsigned char muxgain_bits;
142 static int rti800_ai_eoc(struct comedi_device *dev,
143 struct comedi_subdevice *s,
144 struct comedi_insn *insn,
145 unsigned long context)
147 unsigned char status;
149 status = inb(dev->iobase + RTI800_CSR);
150 if (status & RTI800_CSR_OVERRUN) {
151 outb(0, dev->iobase + RTI800_CLRFLAGS);
154 if (status & RTI800_CSR_DONE)
159 static int rti800_ai_insn_read(struct comedi_device *dev,
160 struct comedi_subdevice *s,
161 struct comedi_insn *insn,
164 struct rti800_private *devpriv = dev->private;
165 unsigned int chan = CR_CHAN(insn->chanspec);
166 unsigned int gain = CR_RANGE(insn->chanspec);
167 unsigned char muxgain_bits;
171 inb(dev->iobase + RTI800_ADCHI);
172 outb(0, dev->iobase + RTI800_CLRFLAGS);
174 muxgain_bits = chan | (gain << 5);
175 if (muxgain_bits != devpriv->muxgain_bits) {
176 devpriv->muxgain_bits = muxgain_bits;
177 outb(devpriv->muxgain_bits, dev->iobase + RTI800_MUXGAIN);
179 * Without a delay here, the RTI_CSR_OVERRUN bit
180 * gets set, and you will have an error.
183 int delay = (gain == 0) ? 10 :
185 (gain == 2) ? 40 : 80;
191 for (i = 0; i < insn->n; i++) {
192 outb(0, dev->iobase + RTI800_CONVERT);
194 ret = comedi_timeout(dev, s, insn, rti800_ai_eoc, 0);
198 data[i] = inb(dev->iobase + RTI800_ADCLO);
199 data[i] |= (inb(dev->iobase + RTI800_ADCHI) & 0xf) << 8;
201 if (devpriv->adc_2comp)
208 static int rti800_ao_insn_write(struct comedi_device *dev,
209 struct comedi_subdevice *s,
210 struct comedi_insn *insn,
213 struct rti800_private *devpriv = dev->private;
214 unsigned int chan = CR_CHAN(insn->chanspec);
215 int reg_lo = chan ? RTI800_DAC1LO : RTI800_DAC0LO;
216 int reg_hi = chan ? RTI800_DAC1HI : RTI800_DAC0HI;
219 for (i = 0; i < insn->n; i++) {
220 unsigned int val = data[i];
222 s->readback[chan] = val;
224 if (devpriv->dac_2comp[chan])
227 outb(val & 0xff, dev->iobase + reg_lo);
228 outb((val >> 8) & 0xff, dev->iobase + reg_hi);
234 static int rti800_di_insn_bits(struct comedi_device *dev,
235 struct comedi_subdevice *s,
236 struct comedi_insn *insn,
239 data[1] = inb(dev->iobase + RTI800_DI);
243 static int rti800_do_insn_bits(struct comedi_device *dev,
244 struct comedi_subdevice *s,
245 struct comedi_insn *insn,
248 if (comedi_dio_update_state(s, data)) {
249 /* Outputs are inverted... */
250 outb(s->state ^ 0xff, dev->iobase + RTI800_DO);
258 static int rti800_attach(struct comedi_device *dev, struct comedi_devconfig *it)
260 const struct rti800_board *board = dev->board_ptr;
261 struct rti800_private *devpriv;
262 struct comedi_subdevice *s;
265 ret = comedi_request_region(dev, it->options[0], 0x10);
269 outb(0, dev->iobase + RTI800_CSR);
270 inb(dev->iobase + RTI800_ADCHI);
271 outb(0, dev->iobase + RTI800_CLRFLAGS);
273 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
277 devpriv->adc_2comp = (it->options[4] == 0);
278 devpriv->dac_2comp[0] = (it->options[6] == 0);
279 devpriv->dac_2comp[1] = (it->options[8] == 0);
280 /* invalid, forces the MUXGAIN register to be set when first used */
281 devpriv->muxgain_bits = 0xff;
283 ret = comedi_alloc_subdevices(dev, 4);
287 s = &dev->subdevices[0];
289 s->type = COMEDI_SUBD_AI;
290 s->subdev_flags = SDF_READABLE | SDF_GROUND;
291 s->n_chan = (it->options[2] ? 16 : 8);
292 s->insn_read = rti800_ai_insn_read;
294 s->range_table = (it->options[3] < ARRAY_SIZE(rti800_ai_ranges))
295 ? rti800_ai_ranges[it->options[3]]
298 s = &dev->subdevices[1];
300 /* ao subdevice (only on rti815) */
301 s->type = COMEDI_SUBD_AO;
302 s->subdev_flags = SDF_WRITABLE;
305 s->range_table_list = devpriv->ao_range_type_list;
306 devpriv->ao_range_type_list[0] =
307 (it->options[5] < ARRAY_SIZE(rti800_ao_ranges))
308 ? rti800_ao_ranges[it->options[5]]
310 devpriv->ao_range_type_list[1] =
311 (it->options[7] < ARRAY_SIZE(rti800_ao_ranges))
312 ? rti800_ao_ranges[it->options[7]]
314 s->insn_write = rti800_ao_insn_write;
316 ret = comedi_alloc_subdev_readback(s);
320 s->type = COMEDI_SUBD_UNUSED;
323 s = &dev->subdevices[2];
325 s->type = COMEDI_SUBD_DI;
326 s->subdev_flags = SDF_READABLE;
328 s->insn_bits = rti800_di_insn_bits;
330 s->range_table = &range_digital;
332 s = &dev->subdevices[3];
334 s->type = COMEDI_SUBD_DO;
335 s->subdev_flags = SDF_WRITABLE;
337 s->insn_bits = rti800_do_insn_bits;
339 s->range_table = &range_digital;
342 * There is also an Am9513 timer on these boards. This subdevice
343 * is not currently supported.
349 static struct comedi_driver rti800_driver = {
350 .driver_name = "rti800",
351 .module = THIS_MODULE,
352 .attach = rti800_attach,
353 .detach = comedi_legacy_detach,
354 .num_names = ARRAY_SIZE(rti800_boardtypes),
355 .board_name = &rti800_boardtypes[0].name,
356 .offset = sizeof(struct rti800_board),
358 module_comedi_driver(rti800_driver);
360 MODULE_DESCRIPTION("Comedi: RTI-800 Multifunction Analog/Digital board");
361 MODULE_AUTHOR("Comedi http://www.comedi.org");
362 MODULE_LICENSE("GPL");