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Linux/drivers/staging/comedi/drivers/dyna_pci10xx.c

  1 /*
  2  * comedi/drivers/dyna_pci10xx.c
  3  * Copyright (C) 2011 Prashant Shah, pshah.mumbai@gmail.com
  4  *
  5  * This program is free software; you can redistribute it and/or modify
  6  * it under the terms of the GNU General Public License as published by
  7  * the Free Software Foundation; either version 2 of the License, or
  8  * (at your option) any later version.
  9  *
 10  * This program is distributed in the hope that it will be useful,
 11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 13  * GNU General Public License for more details.
 14  */
 15 
 16 /*
 17  Driver: dyna_pci10xx
 18  Devices: Dynalog India PCI DAQ Cards, http://www.dynalogindia.com/
 19  Author: Prashant Shah <pshah.mumbai@gmail.com>
 20  Developed at Automation Labs, Chemical Dept., IIT Bombay, India.
 21  Prof. Kannan Moudgalya <kannan@iitb.ac.in>
 22  http://www.iitb.ac.in
 23  Status: Stable
 24  Version: 1.0
 25  Device Supported :
 26  - Dynalog PCI 1050
 27 
 28  Notes :
 29  - Dynalog India Pvt. Ltd. does not have a registered PCI Vendor ID and
 30  they are using the PLX Technlogies Vendor ID since that is the PCI Chip used
 31  in the card.
 32  - Dynalog India Pvt. Ltd. has provided the internal register specification for
 33  their cards in their manuals.
 34 */
 35 
 36 #include <linux/module.h>
 37 #include <linux/delay.h>
 38 #include <linux/pci.h>
 39 #include <linux/mutex.h>
 40 
 41 #include "../comedidev.h"
 42 
 43 #define READ_TIMEOUT 50
 44 
 45 static const struct comedi_lrange range_pci1050_ai = {
 46         3, {
 47                 BIP_RANGE(10),
 48                 BIP_RANGE(5),
 49                 UNI_RANGE(10)
 50         }
 51 };
 52 
 53 static const char range_codes_pci1050_ai[] = { 0x00, 0x10, 0x30 };
 54 
 55 struct dyna_pci10xx_private {
 56         struct mutex mutex;
 57         unsigned long BADR3;
 58 };
 59 
 60 static int dyna_pci10xx_ai_eoc(struct comedi_device *dev,
 61                                struct comedi_subdevice *s,
 62                                struct comedi_insn *insn,
 63                                unsigned long context)
 64 {
 65         unsigned int status;
 66 
 67         status = inw_p(dev->iobase);
 68         if (status & (1 << 15))
 69                 return 0;
 70         return -EBUSY;
 71 }
 72 
 73 static int dyna_pci10xx_insn_read_ai(struct comedi_device *dev,
 74                         struct comedi_subdevice *s,
 75                         struct comedi_insn *insn, unsigned int *data)
 76 {
 77         struct dyna_pci10xx_private *devpriv = dev->private;
 78         int n;
 79         u16 d = 0;
 80         int ret = 0;
 81         unsigned int chan, range;
 82 
 83         /* get the channel number and range */
 84         chan = CR_CHAN(insn->chanspec);
 85         range = range_codes_pci1050_ai[CR_RANGE((insn->chanspec))];
 86 
 87         mutex_lock(&devpriv->mutex);
 88         /* convert n samples */
 89         for (n = 0; n < insn->n; n++) {
 90                 /* trigger conversion */
 91                 smp_mb();
 92                 outw_p(0x0000 + range + chan, dev->iobase + 2);
 93                 udelay(10);
 94 
 95                 ret = comedi_timeout(dev, s, insn, dyna_pci10xx_ai_eoc, 0);
 96                 if (ret)
 97                         break;
 98 
 99                 /* read data */
100                 d = inw_p(dev->iobase);
101                 /* mask the first 4 bits - EOC bits */
102                 d &= 0x0FFF;
103                 data[n] = d;
104         }
105         mutex_unlock(&devpriv->mutex);
106 
107         /* return the number of samples read/written */
108         return ret ? ret : n;
109 }
110 
111 /* analog output callback */
112 static int dyna_pci10xx_insn_write_ao(struct comedi_device *dev,
113                                  struct comedi_subdevice *s,
114                                  struct comedi_insn *insn, unsigned int *data)
115 {
116         struct dyna_pci10xx_private *devpriv = dev->private;
117         int n;
118         unsigned int chan, range;
119 
120         chan = CR_CHAN(insn->chanspec);
121         range = range_codes_pci1050_ai[CR_RANGE((insn->chanspec))];
122 
123         mutex_lock(&devpriv->mutex);
124         for (n = 0; n < insn->n; n++) {
125                 smp_mb();
126                 /* trigger conversion and write data */
127                 outw_p(data[n], dev->iobase);
128                 udelay(10);
129         }
130         mutex_unlock(&devpriv->mutex);
131         return n;
132 }
133 
134 /* digital input bit interface */
135 static int dyna_pci10xx_di_insn_bits(struct comedi_device *dev,
136                               struct comedi_subdevice *s,
137                               struct comedi_insn *insn, unsigned int *data)
138 {
139         struct dyna_pci10xx_private *devpriv = dev->private;
140         u16 d = 0;
141 
142         mutex_lock(&devpriv->mutex);
143         smp_mb();
144         d = inw_p(devpriv->BADR3);
145         udelay(10);
146 
147         /* on return the data[0] contains output and data[1] contains input */
148         data[1] = d;
149         data[0] = s->state;
150         mutex_unlock(&devpriv->mutex);
151         return insn->n;
152 }
153 
154 static int dyna_pci10xx_do_insn_bits(struct comedi_device *dev,
155                                      struct comedi_subdevice *s,
156                                      struct comedi_insn *insn,
157                                      unsigned int *data)
158 {
159         struct dyna_pci10xx_private *devpriv = dev->private;
160 
161         mutex_lock(&devpriv->mutex);
162         if (comedi_dio_update_state(s, data)) {
163                 smp_mb();
164                 outw_p(s->state, devpriv->BADR3);
165                 udelay(10);
166         }
167 
168         data[1] = s->state;
169         mutex_unlock(&devpriv->mutex);
170 
171         return insn->n;
172 }
173 
174 static int dyna_pci10xx_auto_attach(struct comedi_device *dev,
175                                               unsigned long context_unused)
176 {
177         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
178         struct dyna_pci10xx_private *devpriv;
179         struct comedi_subdevice *s;
180         int ret;
181 
182         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
183         if (!devpriv)
184                 return -ENOMEM;
185 
186         ret = comedi_pci_enable(dev);
187         if (ret)
188                 return ret;
189         dev->iobase = pci_resource_start(pcidev, 2);
190         devpriv->BADR3 = pci_resource_start(pcidev, 3);
191 
192         mutex_init(&devpriv->mutex);
193 
194         ret = comedi_alloc_subdevices(dev, 4);
195         if (ret)
196                 return ret;
197 
198         /* analog input */
199         s = &dev->subdevices[0];
200         s->type = COMEDI_SUBD_AI;
201         s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
202         s->n_chan = 16;
203         s->maxdata = 0x0FFF;
204         s->range_table = &range_pci1050_ai;
205         s->len_chanlist = 16;
206         s->insn_read = dyna_pci10xx_insn_read_ai;
207 
208         /* analog output */
209         s = &dev->subdevices[1];
210         s->type = COMEDI_SUBD_AO;
211         s->subdev_flags = SDF_WRITABLE;
212         s->n_chan = 16;
213         s->maxdata = 0x0FFF;
214         s->range_table = &range_unipolar10;
215         s->len_chanlist = 16;
216         s->insn_write = dyna_pci10xx_insn_write_ao;
217 
218         /* digital input */
219         s = &dev->subdevices[2];
220         s->type = COMEDI_SUBD_DI;
221         s->subdev_flags = SDF_READABLE | SDF_GROUND;
222         s->n_chan = 16;
223         s->maxdata = 1;
224         s->range_table = &range_digital;
225         s->len_chanlist = 16;
226         s->insn_bits = dyna_pci10xx_di_insn_bits;
227 
228         /* digital output */
229         s = &dev->subdevices[3];
230         s->type = COMEDI_SUBD_DO;
231         s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
232         s->n_chan = 16;
233         s->maxdata = 1;
234         s->range_table = &range_digital;
235         s->len_chanlist = 16;
236         s->state = 0;
237         s->insn_bits = dyna_pci10xx_do_insn_bits;
238 
239         return 0;
240 }
241 
242 static void dyna_pci10xx_detach(struct comedi_device *dev)
243 {
244         struct dyna_pci10xx_private *devpriv = dev->private;
245 
246         if (devpriv)
247                 mutex_destroy(&devpriv->mutex);
248         comedi_pci_disable(dev);
249 }
250 
251 static struct comedi_driver dyna_pci10xx_driver = {
252         .driver_name    = "dyna_pci10xx",
253         .module         = THIS_MODULE,
254         .auto_attach    = dyna_pci10xx_auto_attach,
255         .detach         = dyna_pci10xx_detach,
256 };
257 
258 static int dyna_pci10xx_pci_probe(struct pci_dev *dev,
259                                   const struct pci_device_id *id)
260 {
261         return comedi_pci_auto_config(dev, &dyna_pci10xx_driver,
262                                       id->driver_data);
263 }
264 
265 static const struct pci_device_id dyna_pci10xx_pci_table[] = {
266         { PCI_DEVICE(PCI_VENDOR_ID_PLX, 0x1050) },
267         { 0 }
268 };
269 MODULE_DEVICE_TABLE(pci, dyna_pci10xx_pci_table);
270 
271 static struct pci_driver dyna_pci10xx_pci_driver = {
272         .name           = "dyna_pci10xx",
273         .id_table       = dyna_pci10xx_pci_table,
274         .probe          = dyna_pci10xx_pci_probe,
275         .remove         = comedi_pci_auto_unconfig,
276 };
277 module_comedi_pci_driver(dyna_pci10xx_driver, dyna_pci10xx_pci_driver);
278 
279 MODULE_LICENSE("GPL");
280 MODULE_AUTHOR("Prashant Shah <pshah.mumbai@gmail.com>");
281 MODULE_DESCRIPTION("Comedi based drivers for Dynalog PCI DAQ cards");
282 

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