2 comedi/drivers/ni_at_ao.c
3 Driver for NI AT-AO-6/10 boards
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 2000,2002 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: National Instruments AT-AO-6/10
26 Devices: [National Instruments] AT-AO-6 (at-ao-6), AT-AO-10 (at-ao-10)
29 Updated: Sun Dec 26 12:26:28 EST 2004
31 Configuration options:
32 [0] - I/O port base address
35 [3] - analog output range, set by jumpers on hardware (0 for -10 to 10V
36 bipolar, 1 for 0V to 10V unipolar)
40 * Register-level programming information can be found in NI
41 * document 320379.pdf.
44 #include "../comedidev.h"
46 #include <linux/ioport.h>
49 /* registers with _2_ are accessed when GRP2WR is set in CFG1 */
51 #define ATAO_SIZE 0x20
53 #define ATAO_2_DMATCCLR 0x00 /* W 16 */
54 #define ATAO_DIN 0x00 /* R 16 */
55 #define ATAO_DOUT 0x00 /* W 16 */
57 #define ATAO_CFG2 0x02 /* W 16 */
75 #define ATAO_2_INT1CLR 0x02 /* W 16 */
77 #define ATAO_CFG3 0x04 /* W 16 */
78 #define DMAMODE 0x0040
81 #define DOUTEN2 0x0008
82 #define DOUTEN1 0x0004
86 #define ATAO_2_INT2CLR 0x04 /* W 16 */
88 #define ATAO_82C53_BASE 0x06 /* RW 8 */
90 #define ATAO_82C53_CNTR1 0x06 /* RW 8 */
91 #define ATAO_82C53_CNTR2 0x07 /* RW 8 */
92 #define ATAO_82C53_CNTR3 0x08 /* RW 8 */
93 #define ATAO_82C53_CNTRCMD 0x09 /* W 8 */
100 #define MODESEL0 0x02
102 /* read-back command */
118 #define ATAO_2_RTSISHFT 0x06 /* W 8 */
121 #define ATAO_2_RTSISTRB 0x07 /* W 8 */
123 #define ATAO_CFG1 0x0a /* W 16 */
124 #define EXTINT2EN 0x8000
125 #define EXTINT1EN 0x4000
126 #define CNTINT2EN 0x2000
127 #define CNTINT1EN 0x1000
128 #define TCINTEN 0x0800
129 #define CNT1SRC 0x0400
130 #define CNT2SRC 0x0200
131 #define FIFOEN 0x0100
132 #define GRP2WR 0x0080
133 #define EXTUPDEN 0x0040
136 #define CH_mask 0x000f
137 #define ATAO_STATUS 0x0a /* R 16 */
144 #define PROMOUT 0x0001
146 #define ATAO_FIFO_WRITE 0x0c /* W 16 */
147 #define ATAO_FIFO_CLEAR 0x0c /* R 16 */
148 #define ATAO_DACn(x) (0x0c + 2*(x)) /* W */
151 * Board descriptions for two imaginary boards. Describing the
152 * boards in this way is optional, and completely driver-dependent.
153 * Some drivers use arrays such as this, other do not.
160 struct atao_private {
166 /* Used for AO readback */
167 unsigned int ao_readback[10];
170 static void atao_reset(struct comedi_device *dev)
172 struct atao_private *devpriv = dev->private;
174 /* This is the reset sequence described in the manual */
177 outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);
179 outb(RWSEL0 | MODESEL2, dev->iobase + ATAO_82C53_CNTRCMD);
180 outb(0x03, dev->iobase + ATAO_82C53_CNTR1);
181 outb(CNTRSEL0 | RWSEL0 | MODESEL2, dev->iobase + ATAO_82C53_CNTRCMD);
184 outw(devpriv->cfg2, dev->iobase + ATAO_CFG2);
187 outw(devpriv->cfg3, dev->iobase + ATAO_CFG3);
189 inw(dev->iobase + ATAO_FIFO_CLEAR);
191 devpriv->cfg1 |= GRP2WR;
192 outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);
194 outw(0, dev->iobase + ATAO_2_INT1CLR);
195 outw(0, dev->iobase + ATAO_2_INT2CLR);
196 outw(0, dev->iobase + ATAO_2_DMATCCLR);
198 devpriv->cfg1 &= ~GRP2WR;
199 outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);
202 static int atao_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
203 struct comedi_insn *insn, unsigned int *data)
205 struct atao_private *devpriv = dev->private;
207 int chan = CR_CHAN(insn->chanspec);
210 for (i = 0; i < insn->n; i++) {
211 bits = data[i] - 0x800;
213 devpriv->cfg1 |= GRP2WR;
214 outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);
216 outw(bits, dev->iobase + ATAO_DACn(chan));
218 devpriv->cfg1 &= ~GRP2WR;
219 outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);
221 devpriv->ao_readback[chan] = data[i];
227 static int atao_ao_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
228 struct comedi_insn *insn, unsigned int *data)
230 struct atao_private *devpriv = dev->private;
232 int chan = CR_CHAN(insn->chanspec);
234 for (i = 0; i < insn->n; i++)
235 data[i] = devpriv->ao_readback[chan];
240 static int atao_dio_insn_bits(struct comedi_device *dev,
241 struct comedi_subdevice *s,
242 struct comedi_insn *insn, unsigned int *data)
245 s->state &= ~data[0];
246 s->state |= data[0] & data[1];
247 outw(s->state, dev->iobase + ATAO_DOUT);
250 data[1] = inw(dev->iobase + ATAO_DIN);
255 static int atao_dio_insn_config(struct comedi_device *dev,
256 struct comedi_subdevice *s,
257 struct comedi_insn *insn, unsigned int *data)
259 struct atao_private *devpriv = dev->private;
260 int chan = CR_CHAN(insn->chanspec);
261 unsigned int mask, bit;
263 /* The input or output configuration of each digital line is
264 * configured by a special insn_config instruction. chanspec
265 * contains the channel to be changed, and data[0] contains the
266 * value COMEDI_INPUT or COMEDI_OUTPUT. */
268 mask = (chan < 4) ? 0x0f : 0xf0;
269 bit = (chan < 4) ? DOUTEN1 : DOUTEN2;
272 case INSN_CONFIG_DIO_OUTPUT:
274 devpriv->cfg3 |= bit;
276 case INSN_CONFIG_DIO_INPUT:
278 devpriv->cfg3 &= ~bit;
280 case INSN_CONFIG_DIO_QUERY:
282 (s->io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT;
290 outw(devpriv->cfg3, dev->iobase + ATAO_CFG3);
296 * Figure 2-1 in the manual shows 3 chips labeled DAC8800, which
297 * are 8-channel 8-bit DACs. These are most likely the calibration
298 * DACs. It is not explicitly stated in the manual how to access
299 * the caldacs, but we can guess.
301 static int atao_calib_insn_read(struct comedi_device *dev,
302 struct comedi_subdevice *s,
303 struct comedi_insn *insn, unsigned int *data)
306 for (i = 0; i < insn->n; i++)
307 data[i] = 0; /* XXX */
311 static int atao_calib_insn_write(struct comedi_device *dev,
312 struct comedi_subdevice *s,
313 struct comedi_insn *insn, unsigned int *data)
315 struct atao_private *devpriv = dev->private;
316 unsigned int bitstring, bit;
317 unsigned int chan = CR_CHAN(insn->chanspec);
319 bitstring = ((chan & 0x7) << 8) | (data[insn->n - 1] & 0xff);
321 for (bit = 1 << (11 - 1); bit; bit >>= 1) {
322 outw(devpriv->cfg2 | ((bit & bitstring) ? SDATA : 0),
323 dev->iobase + ATAO_CFG2);
324 outw(devpriv->cfg2 | SCLK | ((bit & bitstring) ? SDATA : 0),
325 dev->iobase + ATAO_CFG2);
327 /* strobe the appropriate caldac */
328 outw(devpriv->cfg2 | (((chan >> 3) + 1) << 14),
329 dev->iobase + ATAO_CFG2);
330 outw(devpriv->cfg2, dev->iobase + ATAO_CFG2);
335 static int atao_attach(struct comedi_device *dev, struct comedi_devconfig *it)
337 const struct atao_board *board = comedi_board(dev);
338 struct atao_private *devpriv;
339 struct comedi_subdevice *s;
343 ao_unipolar = it->options[3];
345 ret = comedi_request_region(dev, it->options[0], ATAO_SIZE);
349 devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
352 dev->private = devpriv;
354 ret = comedi_alloc_subdevices(dev, 4);
358 s = &dev->subdevices[0];
359 /* analog output subdevice */
360 s->type = COMEDI_SUBD_AO;
361 s->subdev_flags = SDF_WRITABLE;
362 s->n_chan = board->n_ao_chans;
363 s->maxdata = (1 << 12) - 1;
365 s->range_table = &range_unipolar10;
367 s->range_table = &range_bipolar10;
368 s->insn_write = &atao_ao_winsn;
369 s->insn_read = &atao_ao_rinsn;
371 s = &dev->subdevices[1];
372 /* digital i/o subdevice */
373 s->type = COMEDI_SUBD_DIO;
374 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
377 s->range_table = &range_digital;
378 s->insn_bits = atao_dio_insn_bits;
379 s->insn_config = atao_dio_insn_config;
381 s = &dev->subdevices[2];
382 /* caldac subdevice */
383 s->type = COMEDI_SUBD_CALIB;
384 s->subdev_flags = SDF_WRITABLE | SDF_INTERNAL;
387 s->insn_read = atao_calib_insn_read;
388 s->insn_write = atao_calib_insn_write;
390 s = &dev->subdevices[3];
391 /* eeprom subdevice */
392 /* s->type=COMEDI_SUBD_EEPROM; */
393 s->type = COMEDI_SUBD_UNUSED;
397 printk(KERN_INFO "\n");
402 static const struct atao_board atao_boards[] = {
412 static struct comedi_driver ni_at_ao_driver = {
413 .driver_name = "ni_at_ao",
414 .module = THIS_MODULE,
415 .attach = atao_attach,
416 .detach = comedi_legacy_detach,
417 .board_name = &atao_boards[0].name,
418 .offset = sizeof(struct atao_board),
419 .num_names = ARRAY_SIZE(atao_boards),
421 module_comedi_driver(ni_at_ao_driver);
423 MODULE_AUTHOR("Comedi http://www.comedi.org");
424 MODULE_DESCRIPTION("Comedi low-level driver");
425 MODULE_LICENSE("GPL");