adl_pci6208.c revision 7c1e5bc7544db67985fed627cba206fc5dee6405 
1/*
2    comedi/drivers/adl_pci6208.c
3
4    Hardware driver for ADLink 6208 series cards:
5	card	     | voltage output    | current output
6	-------------+-------------------+---------------
7	PCI-6208V    |  8 channels       | -
8	PCI-6216V    | 16 channels       | -
9	PCI-6208A    |  8 channels       | 8 channels
10
11    COMEDI - Linux Control and Measurement Device Interface
12    Copyright (C) 2000 David A. Schleef <ds@schleef.org>
13
14    This program is free software; you can redistribute it and/or modify
15    it under the terms of the GNU General Public License as published by
16    the Free Software Foundation; either version 2 of the License, or
17    (at your option) any later version.
18
19    This program is distributed in the hope that it will be useful,
20    but WITHOUT ANY WARRANTY; without even the implied warranty of
21    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22    GNU General Public License for more details.
23
24    You should have received a copy of the GNU General Public License
25    along with this program; if not, write to the Free Software
26    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27*/
28/*
29Driver: adl_pci6208
30Description: ADLink PCI-6208A
31Devices: [ADLink] PCI-6208A (adl_pci6208)
32Author: nsyeow <nsyeow@pd.jaring.my>
33Updated: Fri, 30 Jan 2004 14:44:27 +0800
34Status: untested
35
36Configuration Options:
37  none
38
39References:
40	- ni_660x.c
41	- adl_pci9111.c		copied the entire pci setup section
42	- adl_pci9118.c
43*/
44
45#include "../comedidev.h"
46
47/*
48 * PCI-6208/6216-GL register map
49 */
50#define PCI6208_AO_CONTROL(x)		(0x00 + (2 * (x)))
51#define PCI6208_AO_STATUS		0x00
52#define PCI6208_AO_STATUS_DATA_SEND	(1 << 0)
53#define PCI6208_DIO			0x40
54#define PCI6208_DIO_DO_MASK		(0x0f)
55#define PCI6208_DIO_DO_SHIFT		(0)
56#define PCI6208_DIO_DI_MASK		(0xf0)
57#define PCI6208_DIO_DI_SHIFT		(4)
58
59#define PCI6208_MAX_AO_CHANNELS		8
60
61struct pci6208_board {
62	const char *name;
63	unsigned short dev_id;
64	int ao_chans;
65};
66
67static const struct pci6208_board pci6208_boards[] = {
68	{
69		.name		= "pci6208a",
70		.dev_id		= 0x6208,
71		.ao_chans	= 8,
72	},
73};
74
75struct pci6208_private {
76	struct pci_dev *pci_dev;
77	unsigned int ao_readback[PCI6208_MAX_AO_CHANNELS];
78};
79
80static int pci6208_ao_winsn(struct comedi_device *dev,
81			    struct comedi_subdevice *s,
82			    struct comedi_insn *insn, unsigned int *data)
83{
84	struct pci6208_private *devpriv = dev->private;
85	int chan = CR_CHAN(insn->chanspec);
86	unsigned long invert = 1 << (16 - 1);
87	unsigned long value = 0;
88	unsigned short status;
89	int i;
90
91	for (i = 0; i < insn->n; i++) {
92		value = data[i] ^ invert;
93
94		do {
95			status = inw(dev->iobase + PCI6208_AO_STATUS);
96		} while (status & PCI6208_AO_STATUS_DATA_SEND);
97
98		outw(value, dev->iobase + PCI6208_AO_CONTROL(chan));
99	}
100	devpriv->ao_readback[chan] = value;
101
102	return insn->n;
103}
104
105static int pci6208_ao_rinsn(struct comedi_device *dev,
106			    struct comedi_subdevice *s,
107			    struct comedi_insn *insn, unsigned int *data)
108{
109	struct pci6208_private *devpriv = dev->private;
110	int chan = CR_CHAN(insn->chanspec);
111	int i;
112
113	for (i = 0; i < insn->n; i++)
114		data[i] = devpriv->ao_readback[chan];
115
116	return insn->n;
117}
118
119static int pci6208_dio_insn_bits(struct comedi_device *dev,
120				 struct comedi_subdevice *s,
121				 struct comedi_insn *insn,
122				 unsigned int *data)
123{
124	unsigned int mask = data[0] & PCI6208_DIO_DO_MASK;
125	unsigned int bits = data[1];
126
127	if (mask) {
128		s->state &= ~mask;
129		s->state |= bits & mask;
130
131		outw(s->state, dev->iobase + PCI6208_DIO);
132	}
133
134	s->state = inw(dev->iobase + PCI6208_DIO);
135	data[1] = s->state;
136
137	return insn->n;
138}
139
140static int pci6208_dio_insn_config(struct comedi_device *dev,
141				   struct comedi_subdevice *s,
142				   struct comedi_insn *insn,
143				   unsigned int *data)
144{
145	int chan = CR_CHAN(insn->chanspec);
146	unsigned int mask = 1 << chan;
147
148	switch (data[0]) {
149	case INSN_CONFIG_DIO_QUERY:
150		data[1] = (s->io_bits & mask) ? COMEDI_OUTPUT : COMEDI_INPUT;
151		break;
152	default:
153		return -EINVAL;
154	}
155
156	return insn->n;
157}
158
159static struct pci_dev *pci6208_find_device(struct comedi_device *dev,
160					   struct comedi_devconfig *it)
161{
162	const struct pci6208_board *thisboard;
163	struct pci_dev *pci_dev = NULL;
164	int bus = it->options[0];
165	int slot = it->options[1];
166	int i;
167
168	for_each_pci_dev(pci_dev) {
169		if (pci_dev->vendor != PCI_VENDOR_ID_ADLINK)
170			continue;
171		for (i = 0; i < ARRAY_SIZE(pci6208_boards); i++) {
172			thisboard = &pci6208_boards[i];
173			if (thisboard->dev_id != pci_dev->device)
174				continue;
175			/* was a particular bus/slot requested? */
176			if (bus || slot) {
177				/* are we on the wrong bus/slot? */
178				if (pci_dev->bus->number != bus ||
179				    PCI_SLOT(pci_dev->devfn) != slot)
180					continue;
181			}
182			dev_dbg(dev->class_dev,
183				"Found %s on bus %d, slot, %d, irq=%d\n",
184				thisboard->name,
185				pci_dev->bus->number,
186				PCI_SLOT(pci_dev->devfn),
187				pci_dev->irq);
188			dev->board_ptr = thisboard;
189			return pci_dev;
190		}
191	}
192	dev_err(dev->class_dev,
193		"No supported board found! (req. bus %d, slot %d)\n",
194		bus, slot);
195	return NULL;
196}
197
198static int pci6208_attach(struct comedi_device *dev,
199			  struct comedi_devconfig *it)
200{
201	const struct pci6208_board *thisboard;
202	struct pci6208_private *devpriv;
203	struct comedi_subdevice *s;
204	int ret;
205
206	ret = alloc_private(dev, sizeof(*devpriv));
207	if (ret < 0)
208		return ret;
209	devpriv = dev->private;
210
211	devpriv->pci_dev = pci6208_find_device(dev, it);
212	if (!devpriv->pci_dev)
213		return -EIO;
214	thisboard = comedi_board(dev);
215
216	ret = comedi_pci_enable(devpriv->pci_dev, "adl_pci6208");
217	if (ret) {
218		dev_err(dev->class_dev,
219			"Failed to enable PCI device and request regions\n");
220		return ret;
221	}
222
223	dev->iobase = pci_resource_start(devpriv->pci_dev, 2);
224
225	dev->board_name = thisboard->name;
226
227	ret = comedi_alloc_subdevices(dev, 2);
228	if (ret)
229		return ret;
230
231	s = dev->subdevices + 0;
232	/* analog output subdevice */
233	s->type		= COMEDI_SUBD_AO;
234	s->subdev_flags	= SDF_WRITABLE;
235	s->n_chan	= thisboard->ao_chans;
236	s->maxdata	= 0xffff;
237	s->range_table	= &range_bipolar10;
238	s->insn_write	= pci6208_ao_winsn;
239	s->insn_read	= pci6208_ao_rinsn;
240
241	s = dev->subdevices + 1;
242	/* digital i/o subdevice */
243	s->type		= COMEDI_SUBD_DIO;
244	s->subdev_flags	= SDF_READABLE | SDF_WRITABLE;
245	s->n_chan	= 8;
246	s->maxdata	= 1;
247	s->range_table	= &range_digital;
248	s->insn_bits	= pci6208_dio_insn_bits;
249	s->insn_config	= pci6208_dio_insn_config;
250
251	s->io_bits	= 0x0f;
252	s->state	= inw(dev->iobase + PCI6208_DIO);
253
254	dev_info(dev->class_dev, "%s: %s, I/O base=0x%04lx\n",
255		dev->driver->driver_name, dev->board_name, dev->iobase);
256
257	return 0;
258}
259
260static void pci6208_detach(struct comedi_device *dev)
261{
262	struct pci6208_private *devpriv = dev->private;
263
264	if (devpriv && devpriv->pci_dev) {
265		if (dev->iobase)
266			comedi_pci_disable(devpriv->pci_dev);
267		pci_dev_put(devpriv->pci_dev);
268	}
269}
270
271static struct comedi_driver adl_pci6208_driver = {
272	.driver_name	= "adl_pci6208",
273	.module		= THIS_MODULE,
274	.attach		= pci6208_attach,
275	.detach		= pci6208_detach,
276};
277
278static int __devinit adl_pci6208_pci_probe(struct pci_dev *dev,
279					   const struct pci_device_id *ent)
280{
281	return comedi_pci_auto_config(dev, &adl_pci6208_driver);
282}
283
284static void __devexit adl_pci6208_pci_remove(struct pci_dev *dev)
285{
286	comedi_pci_auto_unconfig(dev);
287}
288
289static DEFINE_PCI_DEVICE_TABLE(adl_pci6208_pci_table) = {
290	{ PCI_DEVICE(PCI_VENDOR_ID_ADLINK, 0x6208) },
291	{ 0 }
292};
293MODULE_DEVICE_TABLE(pci, adl_pci6208_pci_table);
294
295static struct pci_driver adl_pci6208_pci_driver = {
296	.name		= "adl_pci6208",
297	.id_table	= adl_pci6208_pci_table,
298	.probe		= adl_pci6208_pci_probe,
299	.remove		= __devexit_p(adl_pci6208_pci_remove),
300};
301module_comedi_pci_driver(adl_pci6208_driver, adl_pci6208_pci_driver);
302
303MODULE_AUTHOR("Comedi http://www.comedi.org");
304MODULE_DESCRIPTION("Comedi low-level driver");
305MODULE_LICENSE("GPL");
306