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]
23 * (Analog Devices) RTI-815 [rti815]
24 * Author: David A. Schleef <ds@schleef.org>
26 * Updated: Fri, 05 Sep 2008 14:50:44 +0100
28 * Configuration options:
29 * [0] - I/O port base address
30 * [1] - IRQ (not supported / unused)
31 * [2] - A/D mux/reference (number of channels)
33 * 1 = pseudodifferential (common)
40 * 0 = two's complement
45 * [6] - DAC 0 encoding
46 * 0 = two's complement
48 * [7] - DAC 1 range (same as DAC 0)
49 * [8] - DAC 1 encoding (same as DAC 0)
52 #include <linux/interrupt.h>
53 #include "../comedidev.h"
55 #include <linux/ioport.h>
60 #define RTI800_CSR 0x00
61 #define RTI800_CSR_BUSY (1 << 7)
62 #define RTI800_CSR_DONE (1 << 6)
63 #define RTI800_CSR_OVERRUN (1 << 5)
64 #define RTI800_CSR_TCR (1 << 4)
65 #define RTI800_CSR_DMA_ENAB (1 << 3)
66 #define RTI800_CSR_INTR_TC (1 << 2)
67 #define RTI800_CSR_INTR_EC (1 << 1)
68 #define RTI800_CSR_INTR_OVRN (1 << 0)
69 #define RTI800_MUXGAIN 0x01
70 #define RTI800_CONVERT 0x02
71 #define RTI800_ADCLO 0x03
72 #define RTI800_ADCHI 0x04
73 #define RTI800_DAC0LO 0x05
74 #define RTI800_DAC0HI 0x06
75 #define RTI800_DAC1LO 0x07
76 #define RTI800_DAC1HI 0x08
77 #define RTI800_CLRFLAGS 0x09
78 #define RTI800_DI 0x0a
79 #define RTI800_DO 0x0b
80 #define RTI800_9513A_DATA 0x0c
81 #define RTI800_9513A_CNTRL 0x0d
82 #define RTI800_9513A_STATUS 0x0d
84 #define RTI800_IOSIZE 0x10
86 #define RTI800_AI_TIMEOUT 100
88 static const struct comedi_lrange range_rti800_ai_10_bipolar = {
97 static const struct comedi_lrange range_rti800_ai_5_bipolar = {
106 static const struct comedi_lrange range_rti800_ai_unipolar = {
115 static const struct comedi_lrange *const rti800_ai_ranges[] = {
116 &range_rti800_ai_10_bipolar,
117 &range_rti800_ai_5_bipolar,
118 &range_rti800_ai_unipolar,
121 static const struct comedi_lrange *const rti800_ao_ranges[] = {
126 struct rti800_board {
131 static const struct rti800_board rti800_boardtypes[] = {
140 struct rti800_private {
143 const struct comedi_lrange *ao_range_type_list[2];
144 unsigned int ao_readback[2];
145 unsigned char muxgain_bits;
148 static int rti800_ai_wait_for_conversion(struct comedi_device *dev,
151 unsigned char status;
154 for (i = 0; i < timeout; i++) {
155 status = inb(dev->iobase + RTI800_CSR);
156 if (status & RTI800_CSR_OVERRUN) {
157 outb(0, dev->iobase + RTI800_CLRFLAGS);
160 if (status & RTI800_CSR_DONE)
167 static int rti800_ai_insn_read(struct comedi_device *dev,
168 struct comedi_subdevice *s,
169 struct comedi_insn *insn,
172 struct rti800_private *devpriv = dev->private;
173 unsigned int chan = CR_CHAN(insn->chanspec);
174 unsigned int gain = CR_RANGE(insn->chanspec);
175 unsigned char muxgain_bits;
179 inb(dev->iobase + RTI800_ADCHI);
180 outb(0, dev->iobase + RTI800_CLRFLAGS);
182 muxgain_bits = chan | (gain << 5);
183 if (muxgain_bits != devpriv->muxgain_bits) {
184 devpriv->muxgain_bits = muxgain_bits;
185 outb(devpriv->muxgain_bits, dev->iobase + RTI800_MUXGAIN);
187 * Without a delay here, the RTI_CSR_OVERRUN bit
188 * gets set, and you will have an error.
191 int delay = (gain == 0) ? 10 :
193 (gain == 2) ? 40 : 80;
199 for (i = 0; i < insn->n; i++) {
200 outb(0, dev->iobase + RTI800_CONVERT);
201 ret = rti800_ai_wait_for_conversion(dev, RTI800_AI_TIMEOUT);
205 data[i] = inb(dev->iobase + RTI800_ADCLO);
206 data[i] |= (inb(dev->iobase + RTI800_ADCHI) & 0xf) << 8;
208 if (devpriv->adc_2comp)
215 static int rti800_ao_insn_read(struct comedi_device *dev,
216 struct comedi_subdevice *s,
217 struct comedi_insn *insn,
220 struct rti800_private *devpriv = dev->private;
221 unsigned int chan = CR_CHAN(insn->chanspec);
224 for (i = 0; i < insn->n; i++)
225 data[i] = devpriv->ao_readback[chan];
230 static int rti800_ao_insn_write(struct comedi_device *dev,
231 struct comedi_subdevice *s,
232 struct comedi_insn *insn,
235 struct rti800_private *devpriv = dev->private;
236 unsigned int chan = CR_CHAN(insn->chanspec);
237 int reg_lo = chan ? RTI800_DAC1LO : RTI800_DAC0LO;
238 int reg_hi = chan ? RTI800_DAC1HI : RTI800_DAC0HI;
239 int val = devpriv->ao_readback[chan];
242 for (i = 0; i < insn->n; i++) {
244 if (devpriv->dac_2comp[chan])
247 outb(val & 0xff, dev->iobase + reg_lo);
248 outb((val >> 8) & 0xff, dev->iobase + reg_hi);
251 devpriv->ao_readback[chan] = val;
256 static int rti800_di_insn_bits(struct comedi_device *dev,
257 struct comedi_subdevice *s,
258 struct comedi_insn *insn,
261 data[1] = inb(dev->iobase + RTI800_DI);
265 static int rti800_do_insn_bits(struct comedi_device *dev,
266 struct comedi_subdevice *s,
267 struct comedi_insn *insn,
270 unsigned int mask = data[0];
271 unsigned int bits = data[1];
275 s->state |= (bits & mask);
277 /* Outputs are inverted... */
278 outb(s->state ^ 0xff, dev->iobase + RTI800_DO);
286 static int rti800_attach(struct comedi_device *dev, struct comedi_devconfig *it)
288 const struct rti800_board *board = comedi_board(dev);
289 struct rti800_private *devpriv;
290 struct comedi_subdevice *s;
293 ret = comedi_request_region(dev, it->options[0], RTI800_IOSIZE);
297 outb(0, dev->iobase + RTI800_CSR);
298 inb(dev->iobase + RTI800_ADCHI);
299 outb(0, dev->iobase + RTI800_CLRFLAGS);
301 devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
304 dev->private = devpriv;
306 devpriv->adc_2comp = (it->options[4] == 0);
307 devpriv->dac_2comp[0] = (it->options[6] == 0);
308 devpriv->dac_2comp[1] = (it->options[8] == 0);
309 /* invalid, forces the MUXGAIN register to be set when first used */
310 devpriv->muxgain_bits = 0xff;
312 ret = comedi_alloc_subdevices(dev, 4);
316 s = &dev->subdevices[0];
318 s->type = COMEDI_SUBD_AI;
319 s->subdev_flags = SDF_READABLE | SDF_GROUND;
320 s->n_chan = (it->options[2] ? 16 : 8);
321 s->insn_read = rti800_ai_insn_read;
323 s->range_table = (it->options[3] < ARRAY_SIZE(rti800_ai_ranges))
324 ? rti800_ai_ranges[it->options[3]]
327 s = &dev->subdevices[1];
329 /* ao subdevice (only on rti815) */
330 s->type = COMEDI_SUBD_AO;
331 s->subdev_flags = SDF_WRITABLE;
333 s->insn_read = rti800_ao_insn_read;
334 s->insn_write = rti800_ao_insn_write;
336 s->range_table_list = devpriv->ao_range_type_list;
337 devpriv->ao_range_type_list[0] =
338 (it->options[5] < ARRAY_SIZE(rti800_ao_ranges))
339 ? rti800_ao_ranges[it->options[5]]
341 devpriv->ao_range_type_list[1] =
342 (it->options[7] < ARRAY_SIZE(rti800_ao_ranges))
343 ? rti800_ao_ranges[it->options[7]]
346 s->type = COMEDI_SUBD_UNUSED;
349 s = &dev->subdevices[2];
351 s->type = COMEDI_SUBD_DI;
352 s->subdev_flags = SDF_READABLE;
354 s->insn_bits = rti800_di_insn_bits;
356 s->range_table = &range_digital;
358 s = &dev->subdevices[3];
360 s->type = COMEDI_SUBD_DO;
361 s->subdev_flags = SDF_WRITABLE;
363 s->insn_bits = rti800_do_insn_bits;
365 s->range_table = &range_digital;
368 * There is also an Am9513 timer on these boards. This subdevice
369 * is not currently supported.
375 static struct comedi_driver rti800_driver = {
376 .driver_name = "rti800",
377 .module = THIS_MODULE,
378 .attach = rti800_attach,
379 .detach = comedi_legacy_detach,
380 .num_names = ARRAY_SIZE(rti800_boardtypes),
381 .board_name = &rti800_boardtypes[0].name,
382 .offset = sizeof(struct rti800_board),
384 module_comedi_driver(rti800_driver);
386 MODULE_DESCRIPTION("Comedi: RTI-800 Multifunction Analog/Digital board");
387 MODULE_AUTHOR("Comedi http://www.comedi.org");
388 MODULE_LICENSE("GPL");