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Linux/drivers/staging/comedi/drivers/cb_das16_cs.c

  1 /*
  2     comedi/drivers/das16cs.c
  3     Driver for Computer Boards PC-CARD DAS16/16.
  4 
  5     COMEDI - Linux Control and Measurement Device Interface
  6     Copyright (C) 2000, 2001, 2002 David A. Schleef <ds@schleef.org>
  7 
  8     This program is free software; you can redistribute it and/or modify
  9     it under the terms of the GNU General Public License as published by
 10     the Free Software Foundation; either version 2 of the License, or
 11     (at your option) any later version.
 12 
 13     This program is distributed in the hope that it will be useful,
 14     but WITHOUT ANY WARRANTY; without even the implied warranty of
 15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 16     GNU General Public License for more details.
 17 
 18     PCMCIA support code for this driver is adapted from the dummy_cs.c
 19     driver of the Linux PCMCIA Card Services package.
 20 
 21     The initial developer of the original code is David A. Hinds
 22     <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
 23     are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
 24 
 25 */
 26 /*
 27 Driver: cb_das16_cs
 28 Description: Computer Boards PC-CARD DAS16/16
 29 Devices: [ComputerBoards] PC-CARD DAS16/16 (cb_das16_cs), PC-CARD DAS16/16-AO
 30 Author: ds
 31 Updated: Mon, 04 Nov 2002 20:04:21 -0800
 32 Status: experimental
 33 
 34 
 35 */
 36 
 37 #include <linux/module.h>
 38 #include <linux/interrupt.h>
 39 #include <linux/delay.h>
 40 
 41 #include "../comedidev.h"
 42 
 43 #include <pcmcia/cistpl.h>
 44 #include <pcmcia/ds.h>
 45 
 46 #include "comedi_fc.h"
 47 #include "8253.h"
 48 
 49 #define DAS16CS_ADC_DATA                0
 50 #define DAS16CS_DIO_MUX                 2
 51 #define DAS16CS_MISC1                   4
 52 #define DAS16CS_MISC2                   6
 53 #define DAS16CS_CTR0                    8
 54 #define DAS16CS_CTR1                    10
 55 #define DAS16CS_CTR2                    12
 56 #define DAS16CS_CTR_CONTROL             14
 57 #define DAS16CS_DIO                     16
 58 
 59 struct das16cs_board {
 60         const char *name;
 61         int device_id;
 62         int n_ao_chans;
 63 };
 64 
 65 static const struct das16cs_board das16cs_boards[] = {
 66         {
 67                 .name           = "PC-CARD DAS16/16-AO",
 68                 .device_id      = 0x0039,
 69                 .n_ao_chans     = 2,
 70         }, {
 71                 .name           = "PCM-DAS16s/16",
 72                 .device_id      = 0x4009,
 73                 .n_ao_chans     = 0,
 74         }, {
 75                 .name           = "PC-CARD DAS16/16",
 76                 .device_id      = 0x0000,       /* unknown */
 77                 .n_ao_chans     = 0,
 78         },
 79 };
 80 
 81 struct das16cs_private {
 82         unsigned short status1;
 83         unsigned short status2;
 84 };
 85 
 86 static const struct comedi_lrange das16cs_ai_range = {
 87         4, {
 88                 BIP_RANGE(10),
 89                 BIP_RANGE(5),
 90                 BIP_RANGE(2.5),
 91                 BIP_RANGE(1.25),
 92         }
 93 };
 94 
 95 static int das16cs_ai_eoc(struct comedi_device *dev,
 96                           struct comedi_subdevice *s,
 97                           struct comedi_insn *insn,
 98                           unsigned long context)
 99 {
100         unsigned int status;
101 
102         status = inw(dev->iobase + DAS16CS_MISC1);
103         if (status & 0x0080)
104                 return 0;
105         return -EBUSY;
106 }
107 
108 static int das16cs_ai_rinsn(struct comedi_device *dev,
109                             struct comedi_subdevice *s,
110                             struct comedi_insn *insn, unsigned int *data)
111 {
112         struct das16cs_private *devpriv = dev->private;
113         int chan = CR_CHAN(insn->chanspec);
114         int range = CR_RANGE(insn->chanspec);
115         int aref = CR_AREF(insn->chanspec);
116         int ret;
117         int i;
118 
119         outw(chan, dev->iobase + DAS16CS_DIO_MUX);
120 
121         devpriv->status1 &= ~0xf320;
122         devpriv->status1 |= (aref == AREF_DIFF) ? 0 : 0x0020;
123         outw(devpriv->status1, dev->iobase + DAS16CS_MISC1);
124 
125         devpriv->status2 &= ~0xff00;
126         switch (range) {
127         case 0:
128                 devpriv->status2 |= 0x800;
129                 break;
130         case 1:
131                 devpriv->status2 |= 0x000;
132                 break;
133         case 2:
134                 devpriv->status2 |= 0x100;
135                 break;
136         case 3:
137                 devpriv->status2 |= 0x200;
138                 break;
139         }
140         outw(devpriv->status2, dev->iobase + DAS16CS_MISC2);
141 
142         for (i = 0; i < insn->n; i++) {
143                 outw(0, dev->iobase + DAS16CS_ADC_DATA);
144 
145                 ret = comedi_timeout(dev, s, insn, das16cs_ai_eoc, 0);
146                 if (ret)
147                         return ret;
148 
149                 data[i] = inw(dev->iobase + DAS16CS_ADC_DATA);
150         }
151 
152         return i;
153 }
154 
155 static int das16cs_ao_insn_write(struct comedi_device *dev,
156                                  struct comedi_subdevice *s,
157                                  struct comedi_insn *insn,
158                                  unsigned int *data)
159 {
160         struct das16cs_private *devpriv = dev->private;
161         unsigned int chan = CR_CHAN(insn->chanspec);
162         unsigned int val = s->readback[chan];
163         unsigned short status1;
164         int bit;
165         int i;
166 
167         for (i = 0; i < insn->n; i++) {
168                 val = data[i];
169 
170                 outw(devpriv->status1, dev->iobase + DAS16CS_MISC1);
171                 udelay(1);
172 
173                 status1 = devpriv->status1 & ~0xf;
174                 if (chan)
175                         status1 |= 0x0001;
176                 else
177                         status1 |= 0x0008;
178 
179                 outw(status1, dev->iobase + DAS16CS_MISC1);
180                 udelay(1);
181 
182                 for (bit = 15; bit >= 0; bit--) {
183                         int b = (val >> bit) & 0x1;
184 
185                         b <<= 1;
186                         outw(status1 | b | 0x0000, dev->iobase + DAS16CS_MISC1);
187                         udelay(1);
188                         outw(status1 | b | 0x0004, dev->iobase + DAS16CS_MISC1);
189                         udelay(1);
190                 }
191                 /*
192                  * Make both DAC0CS and DAC1CS high to load
193                  * the new data and update analog the output
194                  */
195                 outw(status1 | 0x9, dev->iobase + DAS16CS_MISC1);
196         }
197         s->readback[chan] = val;
198 
199         return insn->n;
200 }
201 
202 static int das16cs_dio_insn_bits(struct comedi_device *dev,
203                                  struct comedi_subdevice *s,
204                                  struct comedi_insn *insn,
205                                  unsigned int *data)
206 {
207         if (comedi_dio_update_state(s, data))
208                 outw(s->state, dev->iobase + DAS16CS_DIO);
209 
210         data[1] = inw(dev->iobase + DAS16CS_DIO);
211 
212         return insn->n;
213 }
214 
215 static int das16cs_dio_insn_config(struct comedi_device *dev,
216                                    struct comedi_subdevice *s,
217                                    struct comedi_insn *insn,
218                                    unsigned int *data)
219 {
220         struct das16cs_private *devpriv = dev->private;
221         unsigned int chan = CR_CHAN(insn->chanspec);
222         unsigned int mask;
223         int ret;
224 
225         if (chan < 4)
226                 mask = 0x0f;
227         else
228                 mask = 0xf0;
229 
230         ret = comedi_dio_insn_config(dev, s, insn, data, mask);
231         if (ret)
232                 return ret;
233 
234         devpriv->status2 &= ~0x00c0;
235         devpriv->status2 |= (s->io_bits & 0xf0) ? 0x0080 : 0;
236         devpriv->status2 |= (s->io_bits & 0x0f) ? 0x0040 : 0;
237 
238         outw(devpriv->status2, dev->iobase + DAS16CS_MISC2);
239 
240         return insn->n;
241 }
242 
243 static const void *das16cs_find_boardinfo(struct comedi_device *dev,
244                                           struct pcmcia_device *link)
245 {
246         const struct das16cs_board *board;
247         int i;
248 
249         for (i = 0; i < ARRAY_SIZE(das16cs_boards); i++) {
250                 board = &das16cs_boards[i];
251                 if (board->device_id == link->card_id)
252                         return board;
253         }
254 
255         return NULL;
256 }
257 
258 static int das16cs_auto_attach(struct comedi_device *dev,
259                                unsigned long context)
260 {
261         struct pcmcia_device *link = comedi_to_pcmcia_dev(dev);
262         const struct das16cs_board *board;
263         struct das16cs_private *devpriv;
264         struct comedi_subdevice *s;
265         int ret;
266 
267         board = das16cs_find_boardinfo(dev, link);
268         if (!board)
269                 return -ENODEV;
270         dev->board_ptr = board;
271         dev->board_name = board->name;
272 
273         link->config_flags |= CONF_AUTO_SET_IO | CONF_ENABLE_IRQ;
274         ret = comedi_pcmcia_enable(dev, NULL);
275         if (ret)
276                 return ret;
277         dev->iobase = link->resource[0]->start;
278 
279         link->priv = dev;
280 
281         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
282         if (!devpriv)
283                 return -ENOMEM;
284 
285         ret = comedi_alloc_subdevices(dev, 3);
286         if (ret)
287                 return ret;
288 
289         s = &dev->subdevices[0];
290         /* analog input subdevice */
291         s->type         = COMEDI_SUBD_AI;
292         s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF | SDF_CMD_READ;
293         s->n_chan       = 16;
294         s->maxdata      = 0xffff;
295         s->range_table  = &das16cs_ai_range;
296         s->len_chanlist = 16;
297         s->insn_read    = das16cs_ai_rinsn;
298 
299         s = &dev->subdevices[1];
300         /* analog output subdevice */
301         if (board->n_ao_chans) {
302                 s->type         = COMEDI_SUBD_AO;
303                 s->subdev_flags = SDF_WRITABLE;
304                 s->n_chan       = board->n_ao_chans;
305                 s->maxdata      = 0xffff;
306                 s->range_table  = &range_bipolar10;
307                 s->insn_write   = &das16cs_ao_insn_write;
308                 s->insn_read    = comedi_readback_insn_read;
309 
310                 ret = comedi_alloc_subdev_readback(s);
311                 if (ret)
312                         return ret;
313         } else {
314                 s->type         = COMEDI_SUBD_UNUSED;
315         }
316 
317         s = &dev->subdevices[2];
318         /* digital i/o subdevice */
319         s->type         = COMEDI_SUBD_DIO;
320         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
321         s->n_chan       = 8;
322         s->maxdata      = 1;
323         s->range_table  = &range_digital;
324         s->insn_bits    = das16cs_dio_insn_bits;
325         s->insn_config  = das16cs_dio_insn_config;
326 
327         return 0;
328 }
329 
330 static struct comedi_driver driver_das16cs = {
331         .driver_name    = "cb_das16_cs",
332         .module         = THIS_MODULE,
333         .auto_attach    = das16cs_auto_attach,
334         .detach         = comedi_pcmcia_disable,
335 };
336 
337 static int das16cs_pcmcia_attach(struct pcmcia_device *link)
338 {
339         return comedi_pcmcia_auto_config(link, &driver_das16cs);
340 }
341 
342 static const struct pcmcia_device_id das16cs_id_table[] = {
343         PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x0039),
344         PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4009),
345         PCMCIA_DEVICE_NULL
346 };
347 MODULE_DEVICE_TABLE(pcmcia, das16cs_id_table);
348 
349 static struct pcmcia_driver das16cs_driver = {
350         .name           = "cb_das16_cs",
351         .owner          = THIS_MODULE,
352         .id_table       = das16cs_id_table,
353         .probe          = das16cs_pcmcia_attach,
354         .remove         = comedi_pcmcia_auto_unconfig,
355 };
356 module_comedi_pcmcia_driver(driver_das16cs, das16cs_driver);
357 
358 MODULE_AUTHOR("David A. Schleef <ds@schleef.org>");
359 MODULE_DESCRIPTION("Comedi driver for Computer Boards PC-CARD DAS16/16");
360 MODULE_LICENSE("GPL");
361 

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