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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  * Description: Dynalog India PCI DAQ Cards, http://www.dynalogindia.com/
 19  * Devices: [Dynalog] PCI-1050 (dyna_pci1050)
 20  * Author: Prashant Shah <pshah.mumbai@gmail.com>
 21  * Status: Stable
 22  *
 23  * Developed at Automation Labs, Chemical Dept., IIT Bombay, India.
 24  * Prof. Kannan Moudgalya <kannan@iitb.ac.in>
 25  * http://www.iitb.ac.in
 26  *
 27  * Notes :
 28  * - Dynalog India Pvt. Ltd. does not have a registered PCI Vendor ID and
 29  *   they are using the PLX Technlogies Vendor ID since that is the PCI Chip
 30  *   used in the card.
 31  * - Dynalog India Pvt. Ltd. has provided the internal register specification
 32  *   for their cards in their manuals.
 33  */
 34 
 35 #include <linux/module.h>
 36 #include <linux/delay.h>
 37 #include <linux/pci.h>
 38 #include <linux/mutex.h>
 39 
 40 #include "../comedidev.h"
 41 
 42 #define READ_TIMEOUT 50
 43 
 44 static const struct comedi_lrange range_pci1050_ai = {
 45         3, {
 46                 BIP_RANGE(10),
 47                 BIP_RANGE(5),
 48                 UNI_RANGE(10)
 49         }
 50 };
 51 
 52 static const char range_codes_pci1050_ai[] = { 0x00, 0x10, 0x30 };
 53 
 54 struct dyna_pci10xx_private {
 55         struct mutex mutex;
 56         unsigned long BADR3;
 57 };
 58 
 59 static int dyna_pci10xx_ai_eoc(struct comedi_device *dev,
 60                                struct comedi_subdevice *s,
 61                                struct comedi_insn *insn,
 62                                unsigned long context)
 63 {
 64         unsigned int status;
 65 
 66         status = inw_p(dev->iobase);
 67         if (status & (1 << 15))
 68                 return 0;
 69         return -EBUSY;
 70 }
 71 
 72 static int dyna_pci10xx_insn_read_ai(struct comedi_device *dev,
 73                         struct comedi_subdevice *s,
 74                         struct comedi_insn *insn, unsigned int *data)
 75 {
 76         struct dyna_pci10xx_private *devpriv = dev->private;
 77         int n;
 78         u16 d = 0;
 79         int ret = 0;
 80         unsigned int chan, range;
 81 
 82         /* get the channel number and range */
 83         chan = CR_CHAN(insn->chanspec);
 84         range = range_codes_pci1050_ai[CR_RANGE((insn->chanspec))];
 85 
 86         mutex_lock(&devpriv->mutex);
 87         /* convert n samples */
 88         for (n = 0; n < insn->n; n++) {
 89                 /* trigger conversion */
 90                 smp_mb();
 91                 outw_p(0x0000 + range + chan, dev->iobase + 2);
 92                 udelay(10);
 93 
 94                 ret = comedi_timeout(dev, s, insn, dyna_pci10xx_ai_eoc, 0);
 95                 if (ret)
 96                         break;
 97 
 98                 /* read data */
 99                 d = inw_p(dev->iobase);
100                 /* mask the first 4 bits - EOC bits */
101                 d &= 0x0FFF;
102                 data[n] = d;
103         }
104         mutex_unlock(&devpriv->mutex);
105 
106         /* return the number of samples read/written */
107         return ret ? ret : n;
108 }
109 
110 /* analog output callback */
111 static int dyna_pci10xx_insn_write_ao(struct comedi_device *dev,
112                                  struct comedi_subdevice *s,
113                                  struct comedi_insn *insn, unsigned int *data)
114 {
115         struct dyna_pci10xx_private *devpriv = dev->private;
116         int n;
117         unsigned int chan, range;
118 
119         chan = CR_CHAN(insn->chanspec);
120         range = range_codes_pci1050_ai[CR_RANGE((insn->chanspec))];
121 
122         mutex_lock(&devpriv->mutex);
123         for (n = 0; n < insn->n; n++) {
124                 smp_mb();
125                 /* trigger conversion and write data */
126                 outw_p(data[n], dev->iobase);
127                 udelay(10);
128         }
129         mutex_unlock(&devpriv->mutex);
130         return n;
131 }
132 
133 /* digital input bit interface */
134 static int dyna_pci10xx_di_insn_bits(struct comedi_device *dev,
135                               struct comedi_subdevice *s,
136                               struct comedi_insn *insn, unsigned int *data)
137 {
138         struct dyna_pci10xx_private *devpriv = dev->private;
139         u16 d = 0;
140 
141         mutex_lock(&devpriv->mutex);
142         smp_mb();
143         d = inw_p(devpriv->BADR3);
144         udelay(10);
145 
146         /* on return the data[0] contains output and data[1] contains input */
147         data[1] = d;
148         data[0] = s->state;
149         mutex_unlock(&devpriv->mutex);
150         return insn->n;
151 }
152 
153 static int dyna_pci10xx_do_insn_bits(struct comedi_device *dev,
154                                      struct comedi_subdevice *s,
155                                      struct comedi_insn *insn,
156                                      unsigned int *data)
157 {
158         struct dyna_pci10xx_private *devpriv = dev->private;
159 
160         mutex_lock(&devpriv->mutex);
161         if (comedi_dio_update_state(s, data)) {
162                 smp_mb();
163                 outw_p(s->state, devpriv->BADR3);
164                 udelay(10);
165         }
166 
167         data[1] = s->state;
168         mutex_unlock(&devpriv->mutex);
169 
170         return insn->n;
171 }
172 
173 static int dyna_pci10xx_auto_attach(struct comedi_device *dev,
174                                               unsigned long context_unused)
175 {
176         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
177         struct dyna_pci10xx_private *devpriv;
178         struct comedi_subdevice *s;
179         int ret;
180 
181         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
182         if (!devpriv)
183                 return -ENOMEM;
184 
185         ret = comedi_pci_enable(dev);
186         if (ret)
187                 return ret;
188         dev->iobase = pci_resource_start(pcidev, 2);
189         devpriv->BADR3 = pci_resource_start(pcidev, 3);
190 
191         mutex_init(&devpriv->mutex);
192 
193         ret = comedi_alloc_subdevices(dev, 4);
194         if (ret)
195                 return ret;
196 
197         /* analog input */
198         s = &dev->subdevices[0];
199         s->type = COMEDI_SUBD_AI;
200         s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
201         s->n_chan = 16;
202         s->maxdata = 0x0FFF;
203         s->range_table = &range_pci1050_ai;
204         s->len_chanlist = 16;
205         s->insn_read = dyna_pci10xx_insn_read_ai;
206 
207         /* analog output */
208         s = &dev->subdevices[1];
209         s->type = COMEDI_SUBD_AO;
210         s->subdev_flags = SDF_WRITABLE;
211         s->n_chan = 16;
212         s->maxdata = 0x0FFF;
213         s->range_table = &range_unipolar10;
214         s->len_chanlist = 16;
215         s->insn_write = dyna_pci10xx_insn_write_ao;
216 
217         /* digital input */
218         s = &dev->subdevices[2];
219         s->type = COMEDI_SUBD_DI;
220         s->subdev_flags = SDF_READABLE;
221         s->n_chan = 16;
222         s->maxdata = 1;
223         s->range_table = &range_digital;
224         s->len_chanlist = 16;
225         s->insn_bits = dyna_pci10xx_di_insn_bits;
226 
227         /* digital output */
228         s = &dev->subdevices[3];
229         s->type = COMEDI_SUBD_DO;
230         s->subdev_flags = SDF_WRITABLE;
231         s->n_chan = 16;
232         s->maxdata = 1;
233         s->range_table = &range_digital;
234         s->len_chanlist = 16;
235         s->state = 0;
236         s->insn_bits = dyna_pci10xx_do_insn_bits;
237 
238         return 0;
239 }
240 
241 static void dyna_pci10xx_detach(struct comedi_device *dev)
242 {
243         struct dyna_pci10xx_private *devpriv = dev->private;
244 
245         comedi_pci_detach(dev);
246         if (devpriv)
247                 mutex_destroy(&devpriv->mutex);
248 }
249 
250 static struct comedi_driver dyna_pci10xx_driver = {
251         .driver_name    = "dyna_pci10xx",
252         .module         = THIS_MODULE,
253         .auto_attach    = dyna_pci10xx_auto_attach,
254         .detach         = dyna_pci10xx_detach,
255 };
256 
257 static int dyna_pci10xx_pci_probe(struct pci_dev *dev,
258                                   const struct pci_device_id *id)
259 {
260         return comedi_pci_auto_config(dev, &dyna_pci10xx_driver,
261                                       id->driver_data);
262 }
263 
264 static const struct pci_device_id dyna_pci10xx_pci_table[] = {
265         { PCI_DEVICE(PCI_VENDOR_ID_PLX, 0x1050) },
266         { 0 }
267 };
268 MODULE_DEVICE_TABLE(pci, dyna_pci10xx_pci_table);
269 
270 static struct pci_driver dyna_pci10xx_pci_driver = {
271         .name           = "dyna_pci10xx",
272         .id_table       = dyna_pci10xx_pci_table,
273         .probe          = dyna_pci10xx_pci_probe,
274         .remove         = comedi_pci_auto_unconfig,
275 };
276 module_comedi_pci_driver(dyna_pci10xx_driver, dyna_pci10xx_pci_driver);
277 
278 MODULE_LICENSE("GPL");
279 MODULE_AUTHOR("Prashant Shah <pshah.mumbai@gmail.com>");
280 MODULE_DESCRIPTION("Comedi based drivers for Dynalog PCI DAQ cards");
281 

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