adv_pci1723.c revision c6d94c74a3548ee688283bca38ebe32969e0c1e0 
1/*
2   comedi/drivers/pci1723.c
3
4   COMEDI - Linux Control and Measurement Device Interface
5   Copyright (C) 2000 David A. Schleef <ds@schleef.org>
6
7   This program is free software; you can redistribute it and/or modify
8   it under the terms of the GNU General Public License as published by
9   the Free Software Foundation; either version 2 of the License, or
10   (at your option) any later version.
11
12   This program is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public License for more details.
16*/
17/*
18Driver: adv_pci1723
19Description: Advantech PCI-1723
20Author: yonggang <rsmgnu@gmail.com>, Ian Abbott <abbotti@mev.co.uk>
21Devices: [Advantech] PCI-1723 (adv_pci1723)
22Updated: Mon, 14 Apr 2008 15:12:56 +0100
23Status: works
24
25Configuration Options:
26  [0] - PCI bus of device (optional)
27  [1] - PCI slot of device (optional)
28
29  If bus/slot is not specified, the first supported
30  PCI device found will be used.
31
32Subdevice 0 is 8-channel AO, 16-bit, range +/- 10 V.
33
34Subdevice 1 is 16-channel DIO.  The channels are configurable as input or
35output in 2 groups (0 to 7, 8 to 15).  Configuring any channel implicitly
36configures all channels in the same group.
37
38TODO:
39
401. Add the two milliamp ranges to the AO subdevice (0 to 20 mA, 4 to 20 mA).
412. Read the initial ranges and values of the AO subdevice at start-up instead
42   of reinitializing them.
433. Implement calibration.
44*/
45
46#include <linux/module.h>
47#include <linux/pci.h>
48
49#include "../comedidev.h"
50
51/* all the registers for the pci1723 board */
52#define PCI1723_DA(N)   ((N)<<1)	/* W: D/A register N (0 to 7) */
53
54#define PCI1723_SYN_SET  0x12		/* synchronized set register */
55#define PCI1723_ALL_CHNNELE_SYN_STROBE  0x12
56					/* synchronized status register */
57
58#define PCI1723_RANGE_CALIBRATION_MODE 0x14
59					/* range and calibration mode */
60#define PCI1723_RANGE_CALIBRATION_STATUS 0x14
61					/* range and calibration status */
62
63#define PCI1723_CONTROL_CMD_CALIBRATION_FUN 0x16
64						/*
65						 * SADC control command for
66						 * calibration function
67						 */
68#define PCI1723_STATUS_CMD_CALIBRATION_FUN 0x16
69						/*
70						 * SADC control status for
71						 * calibration function
72						 */
73
74#define PCI1723_CALIBRATION_PARA_STROBE 0x18
75					/* Calibration parameter strobe */
76
77#define PCI1723_DIGITAL_IO_PORT_SET 0x1A	/* Digital I/O port setting */
78#define PCI1723_DIGITAL_IO_PORT_MODE 0x1A	/* Digital I/O port mode */
79
80#define PCI1723_WRITE_DIGITAL_OUTPUT_CMD 0x1C
81					/* Write digital output command */
82#define PCI1723_READ_DIGITAL_INPUT_DATA 0x1C	/* Read digital input data */
83
84#define PCI1723_WRITE_CAL_CMD 0x1E		/* Write calibration command */
85#define PCI1723_READ_CAL_STATUS 0x1E		/* Read calibration status */
86
87#define PCI1723_SYN_STROBE 0x20			/* Synchronized strobe */
88
89#define PCI1723_RESET_ALL_CHN_STROBE 0x22
90					/* Reset all D/A channels strobe */
91
92#define PCI1723_RESET_CAL_CONTROL_STROBE 0x24
93						/*
94						 * Reset the calibration
95						 * controller strobe
96						 */
97
98#define PCI1723_CHANGE_CHA_OUTPUT_TYPE_STROBE 0x26
99						/*
100						 * Change D/A channels output
101						 * type strobe
102						 */
103
104#define PCI1723_SELECT_CALIBRATION 0x28	/* Select the calibration Ref_V */
105
106struct pci1723_private {
107	unsigned char da_range[8];	/* D/A output range for each channel */
108	unsigned short ao_data[8];	/* data output buffer */
109};
110
111/*
112 * The pci1723 card reset;
113 */
114static int pci1723_reset(struct comedi_device *dev)
115{
116	struct pci1723_private *devpriv = dev->private;
117	int i;
118
119	outw(0x01, dev->iobase + PCI1723_SYN_SET);
120					       /* set synchronous output mode */
121
122	for (i = 0; i < 8; i++) {
123		/* set all outputs to 0V */
124		devpriv->ao_data[i] = 0x8000;
125		outw(devpriv->ao_data[i], dev->iobase + PCI1723_DA(i));
126		/* set all ranges to +/- 10V */
127		devpriv->da_range[i] = 0;
128		outw(((devpriv->da_range[i] << 4) | i),
129		     PCI1723_RANGE_CALIBRATION_MODE);
130	}
131
132	outw(0, dev->iobase + PCI1723_CHANGE_CHA_OUTPUT_TYPE_STROBE);
133							    /* update ranges */
134	outw(0, dev->iobase + PCI1723_SYN_STROBE);	    /* update outputs */
135
136	/* set asynchronous output mode */
137	outw(0, dev->iobase + PCI1723_SYN_SET);
138
139	return 0;
140}
141
142static int pci1723_insn_read_ao(struct comedi_device *dev,
143				struct comedi_subdevice *s,
144				struct comedi_insn *insn, unsigned int *data)
145{
146	struct pci1723_private *devpriv = dev->private;
147	int n, chan;
148
149	chan = CR_CHAN(insn->chanspec);
150	for (n = 0; n < insn->n; n++)
151		data[n] = devpriv->ao_data[chan];
152
153	return n;
154}
155
156/*
157  analog data output;
158*/
159static int pci1723_ao_write_winsn(struct comedi_device *dev,
160				  struct comedi_subdevice *s,
161				  struct comedi_insn *insn, unsigned int *data)
162{
163	struct pci1723_private *devpriv = dev->private;
164	unsigned int chan = CR_CHAN(insn->chanspec);
165	int n;
166
167	for (n = 0; n < insn->n; n++) {
168		devpriv->ao_data[chan] = data[n];
169		outw(data[n], dev->iobase + PCI1723_DA(chan));
170	}
171
172	return n;
173}
174
175/*
176  digital i/o config/query
177*/
178static int pci1723_dio_insn_config(struct comedi_device *dev,
179				   struct comedi_subdevice *s,
180				   struct comedi_insn *insn, unsigned int *data)
181{
182	unsigned int chan = CR_CHAN(insn->chanspec);
183	unsigned int mask;
184	unsigned short mode;
185	int ret;
186
187	if (chan < 8)
188		mask = 0x00ff;
189	else
190		mask = 0xff00;
191
192	ret = comedi_dio_insn_config(dev, s, insn, data, mask);
193	if (ret)
194		return ret;
195
196	/* update hardware DIO mode */
197	mode = 0x0000;			/* assume output */
198	if (!(s->io_bits & 0x00ff))
199		mode |= 0x0001;		/* low byte input */
200	if (!(s->io_bits & 0xff00))
201		mode |= 0x0002;		/* high byte input */
202	outw(mode, dev->iobase + PCI1723_DIGITAL_IO_PORT_SET);
203
204	return insn->n;
205}
206
207static int pci1723_dio_insn_bits(struct comedi_device *dev,
208				 struct comedi_subdevice *s,
209				 struct comedi_insn *insn,
210				 unsigned int *data)
211{
212	if (comedi_dio_update_state(s, data))
213		outw(s->state, dev->iobase + PCI1723_WRITE_DIGITAL_OUTPUT_CMD);
214
215	data[1] = inw(dev->iobase + PCI1723_READ_DIGITAL_INPUT_DATA);
216
217	return insn->n;
218}
219
220static int pci1723_auto_attach(struct comedi_device *dev,
221					 unsigned long context_unused)
222{
223	struct pci_dev *pcidev = comedi_to_pci_dev(dev);
224	struct pci1723_private *devpriv;
225	struct comedi_subdevice *s;
226	int ret;
227
228	devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
229	if (!devpriv)
230		return -ENOMEM;
231
232	ret = comedi_pci_enable(dev);
233	if (ret)
234		return ret;
235	dev->iobase = pci_resource_start(pcidev, 2);
236
237	ret = comedi_alloc_subdevices(dev, 2);
238	if (ret)
239		return ret;
240
241	s = &dev->subdevices[0];
242	dev->write_subdev = s;
243	s->type		= COMEDI_SUBD_AO;
244	s->subdev_flags	= SDF_WRITEABLE | SDF_GROUND | SDF_COMMON;
245	s->n_chan	= 8;
246	s->maxdata	= 0xffff;
247	s->len_chanlist	= 8;
248	s->range_table	= &range_bipolar10;
249	s->insn_write	= pci1723_ao_write_winsn;
250	s->insn_read	= pci1723_insn_read_ao;
251
252	s = &dev->subdevices[1];
253	s->type		= COMEDI_SUBD_DIO;
254	s->subdev_flags	= SDF_READABLE | SDF_WRITABLE;
255	s->n_chan	= 16;
256	s->maxdata	= 1;
257	s->len_chanlist	= 16;
258	s->range_table	= &range_digital;
259	s->insn_config	= pci1723_dio_insn_config;
260	s->insn_bits	= pci1723_dio_insn_bits;
261
262	/* read DIO config */
263	switch (inw(dev->iobase + PCI1723_DIGITAL_IO_PORT_MODE) & 0x03) {
264	case 0x00:	/* low byte output, high byte output */
265		s->io_bits = 0xFFFF;
266		break;
267	case 0x01:	/* low byte input, high byte output */
268		s->io_bits = 0xFF00;
269		break;
270	case 0x02:	/* low byte output, high byte input */
271		s->io_bits = 0x00FF;
272		break;
273	case 0x03:	/* low byte input, high byte input */
274		s->io_bits = 0x0000;
275		break;
276	}
277	/* read DIO port state */
278	s->state = inw(dev->iobase + PCI1723_READ_DIGITAL_INPUT_DATA);
279
280	pci1723_reset(dev);
281
282	return 0;
283}
284
285static void pci1723_detach(struct comedi_device *dev)
286{
287	if (dev->iobase)
288		pci1723_reset(dev);
289	comedi_pci_disable(dev);
290}
291
292static struct comedi_driver adv_pci1723_driver = {
293	.driver_name	= "adv_pci1723",
294	.module		= THIS_MODULE,
295	.auto_attach	= pci1723_auto_attach,
296	.detach		= pci1723_detach,
297};
298
299static int adv_pci1723_pci_probe(struct pci_dev *dev,
300				 const struct pci_device_id *id)
301{
302	return comedi_pci_auto_config(dev, &adv_pci1723_driver,
303				      id->driver_data);
304}
305
306static const struct pci_device_id adv_pci1723_pci_table[] = {
307	{ PCI_DEVICE(PCI_VENDOR_ID_ADVANTECH, 0x1723) },
308	{ 0 }
309};
310MODULE_DEVICE_TABLE(pci, adv_pci1723_pci_table);
311
312static struct pci_driver adv_pci1723_pci_driver = {
313	.name		= "adv_pci1723",
314	.id_table	= adv_pci1723_pci_table,
315	.probe		= adv_pci1723_pci_probe,
316	.remove		= comedi_pci_auto_unconfig,
317};
318module_comedi_pci_driver(adv_pci1723_driver, adv_pci1723_pci_driver);
319
320MODULE_AUTHOR("Comedi http://www.comedi.org");
321MODULE_DESCRIPTION("Comedi low-level driver");
322MODULE_LICENSE("GPL");
323