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/drivers/staging/comedi/drivers/adl_pci7432.c

https://bitbucket.org/cyanogenmod/android_kernel_asus_tf300t
C | 252 lines | 172 code | 42 blank | 38 comment | 21 complexity | 4d74b711f92910bdeb035cd08bf73499 MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0
  1/*
  2    comedi/drivers/adl_pci7432.c
  3
  4    Hardware comedi driver fot PCI7432 Adlink card
  5    Copyright (C) 2004 Michel Lachine <mike@mikelachaine.ca>
  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    You should have received a copy of the GNU General Public License
 18    along with this program; if not, write to the Free Software
 19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 20
 21*/
 22/*
 23Driver: adl_pci7432
 24Description: Driver for the Adlink PCI-7432 64 ch. isolated digital io board
 25Devices: [ADLink] PCI-7432 (adl_pci7432)
 26Author: Michel Lachaine <mike@mikelachaine.ca>
 27Status: experimental
 28Updated: Mon, 14 Apr 2008 15:08:14 +0100
 29
 30Configuration Options:
 31  [0] - PCI bus of device (optional)
 32  [1] - PCI slot of device (optional)
 33  If bus/slot is not specified, the first supported
 34  PCI device found will be used.
 35*/
 36
 37#include "../comedidev.h"
 38#include <linux/kernel.h>
 39#include "comedi_pci.h"
 40
 41#define PCI7432_DI      0x00
 42#define PCI7432_DO	    0x00
 43
 44#define PCI_DEVICE_ID_PCI7432 0x7432
 45
 46static DEFINE_PCI_DEVICE_TABLE(adl_pci7432_pci_table) = {
 47	{
 48	PCI_VENDOR_ID_ADLINK, PCI_DEVICE_ID_PCI7432, PCI_ANY_ID,
 49		    PCI_ANY_ID, 0, 0, 0}, {
 50	0}
 51};
 52
 53MODULE_DEVICE_TABLE(pci, adl_pci7432_pci_table);
 54
 55struct adl_pci7432_private {
 56	int data;
 57	struct pci_dev *pci_dev;
 58};
 59
 60#define devpriv ((struct adl_pci7432_private *)dev->private)
 61
 62static int adl_pci7432_attach(struct comedi_device *dev,
 63			      struct comedi_devconfig *it);
 64static int adl_pci7432_detach(struct comedi_device *dev);
 65static struct comedi_driver driver_adl_pci7432 = {
 66	.driver_name = "adl_pci7432",
 67	.module = THIS_MODULE,
 68	.attach = adl_pci7432_attach,
 69	.detach = adl_pci7432_detach,
 70};
 71
 72/* Digital IO */
 73
 74static int adl_pci7432_di_insn_bits(struct comedi_device *dev,
 75				    struct comedi_subdevice *s,
 76				    struct comedi_insn *insn,
 77				    unsigned int *data);
 78
 79static int adl_pci7432_do_insn_bits(struct comedi_device *dev,
 80				    struct comedi_subdevice *s,
 81				    struct comedi_insn *insn,
 82				    unsigned int *data);
 83
 84/*            */
 85
 86static int adl_pci7432_attach(struct comedi_device *dev,
 87			      struct comedi_devconfig *it)
 88{
 89	struct pci_dev *pcidev = NULL;
 90	struct comedi_subdevice *s;
 91	int bus, slot;
 92
 93	printk(KERN_INFO "comedi%d: attach adl_pci7432\n", dev->minor);
 94
 95	dev->board_name = "pci7432";
 96	bus = it->options[0];
 97	slot = it->options[1];
 98
 99	if (alloc_private(dev, sizeof(struct adl_pci7432_private)) < 0)
100		return -ENOMEM;
101
102	if (alloc_subdevices(dev, 2) < 0)
103		return -ENOMEM;
104
105	for_each_pci_dev(pcidev) {
106		if (pcidev->vendor == PCI_VENDOR_ID_ADLINK &&
107		    pcidev->device == PCI_DEVICE_ID_PCI7432) {
108			if (bus || slot) {
109				/* requested particular bus/slot */
110				if (pcidev->bus->number != bus
111				    || PCI_SLOT(pcidev->devfn) != slot) {
112					continue;
113				}
114			}
115			devpriv->pci_dev = pcidev;
116			if (comedi_pci_enable(pcidev, "adl_pci7432") < 0) {
117				printk(KERN_ERR "comedi%d: Failed to enable PCI device and request regions\n",
118				     dev->minor);
119				return -EIO;
120			}
121			dev->iobase = pci_resource_start(pcidev, 2);
122			printk(KERN_INFO "comedi: base addr %4lx\n",
123				dev->iobase);
124
125			s = dev->subdevices + 0;
126			s->type = COMEDI_SUBD_DI;
127			s->subdev_flags =
128			    SDF_READABLE | SDF_GROUND | SDF_COMMON;
129			s->n_chan = 32;
130			s->maxdata = 1;
131			s->len_chanlist = 32;
132			s->io_bits = 0x00000000;
133			s->range_table = &range_digital;
134			s->insn_bits = adl_pci7432_di_insn_bits;
135
136			s = dev->subdevices + 1;
137			s->type = COMEDI_SUBD_DO;
138			s->subdev_flags =
139			    SDF_WRITABLE | SDF_GROUND | SDF_COMMON;
140			s->n_chan = 32;
141			s->maxdata = 1;
142			s->len_chanlist = 32;
143			s->io_bits = 0xffffffff;
144			s->range_table = &range_digital;
145			s->insn_bits = adl_pci7432_do_insn_bits;
146
147			printk(KERN_DEBUG "comedi%d: adl_pci7432 attached\n",
148				dev->minor);
149			return 1;
150		}
151	}
152
153	printk(KERN_ERR "comedi%d: no supported board found! (req. bus/slot : %d/%d)\n",
154	       dev->minor, bus, slot);
155	return -EIO;
156}
157
158static int adl_pci7432_detach(struct comedi_device *dev)
159{
160	printk(KERN_INFO "comedi%d: pci7432: remove\n", dev->minor);
161
162	if (devpriv && devpriv->pci_dev) {
163		if (dev->iobase)
164			comedi_pci_disable(devpriv->pci_dev);
165		pci_dev_put(devpriv->pci_dev);
166	}
167
168	return 0;
169}
170
171static int adl_pci7432_do_insn_bits(struct comedi_device *dev,
172				    struct comedi_subdevice *s,
173				    struct comedi_insn *insn,
174				    unsigned int *data)
175{
176	printk(KERN_DEBUG "comedi: pci7432_do_insn_bits called\n");
177	printk(KERN_DEBUG "comedi: data0: %8x data1: %8x\n", data[0], data[1]);
178
179	if (insn->n != 2)
180		return -EINVAL;
181
182	if (data[0]) {
183		s->state &= ~data[0];
184		s->state |= (data[0] & data[1]);
185
186		printk(KERN_DEBUG "comedi: out: %8x on iobase %4lx\n", s->state,
187		       dev->iobase + PCI7432_DO);
188		outl(s->state & 0xffffffff, dev->iobase + PCI7432_DO);
189	}
190	return 2;
191}
192
193static int adl_pci7432_di_insn_bits(struct comedi_device *dev,
194				    struct comedi_subdevice *s,
195				    struct comedi_insn *insn,
196				    unsigned int *data)
197{
198	printk(KERN_DEBUG "comedi: pci7432_di_insn_bits called\n");
199	printk(KERN_DEBUG "comedi: data0: %8x data1: %8x\n", data[0], data[1]);
200
201	if (insn->n != 2)
202		return -EINVAL;
203
204	data[1] = inl(dev->iobase + PCI7432_DI) & 0xffffffff;
205	printk(KERN_DEBUG "comedi: data1 %8x\n", data[1]);
206
207	return 2;
208}
209
210static int __devinit driver_adl_pci7432_pci_probe(struct pci_dev *dev,
211						  const struct pci_device_id
212						  *ent)
213{
214	return comedi_pci_auto_config(dev, driver_adl_pci7432.driver_name);
215}
216
217static void __devexit driver_adl_pci7432_pci_remove(struct pci_dev *dev)
218{
219	comedi_pci_auto_unconfig(dev);
220}
221
222static struct pci_driver driver_adl_pci7432_pci_driver = {
223	.id_table = adl_pci7432_pci_table,
224	.probe = &driver_adl_pci7432_pci_probe,
225	.remove = __devexit_p(&driver_adl_pci7432_pci_remove)
226};
227
228static int __init driver_adl_pci7432_init_module(void)
229{
230	int retval;
231
232	retval = comedi_driver_register(&driver_adl_pci7432);
233	if (retval < 0)
234		return retval;
235
236	driver_adl_pci7432_pci_driver.name =
237	    (char *)driver_adl_pci7432.driver_name;
238	return pci_register_driver(&driver_adl_pci7432_pci_driver);
239}
240
241static void __exit driver_adl_pci7432_cleanup_module(void)
242{
243	pci_unregister_driver(&driver_adl_pci7432_pci_driver);
244	comedi_driver_unregister(&driver_adl_pci7432);
245}
246
247module_init(driver_adl_pci7432_init_module);
248module_exit(driver_adl_pci7432_cleanup_module);
249
250MODULE_AUTHOR("Comedi http://www.comedi.org");
251MODULE_DESCRIPTION("Comedi low-level driver");
252MODULE_LICENSE("GPL");