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Linux/drivers/staging/comedi/drivers/adv_pci1723.c

  1 /*
  2    comedi/drivers/pci1723.c
  3 
  4    COMEDI - Linux Control and Measurement Device Interface
  5    Copyright (C) 2000 David A. Schleef <ds@schleef.org>
  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 /*
 18 Driver: adv_pci1723
 19 Description: Advantech PCI-1723
 20 Author: yonggang <rsmgnu@gmail.com>, Ian Abbott <abbotti@mev.co.uk>
 21 Devices: [Advantech] PCI-1723 (adv_pci1723)
 22 Updated: Mon, 14 Apr 2008 15:12:56 +0100
 23 Status: works
 24 
 25 Configuration Options:
 26   [0] - PCI bus of device (optional)
 27   [1] - PCI slot of device (optional)
 28 
 29   If bus/slot is not specified, the first supported
 30   PCI device found will be used.
 31 
 32 Subdevice 0 is 8-channel AO, 16-bit, range +/- 10 V.
 33 
 34 Subdevice 1 is 16-channel DIO.  The channels are configurable as input or
 35 output in 2 groups (0 to 7, 8 to 15).  Configuring any channel implicitly
 36 configures all channels in the same group.
 37 
 38 TODO:
 39 
 40 1. Add the two milliamp ranges to the AO subdevice (0 to 20 mA, 4 to 20 mA).
 41 2. Read the initial ranges and values of the AO subdevice at start-up instead
 42    of reinitializing them.
 43 3. Implement calibration.
 44 */
 45 
 46 #include <linux/module.h>
 47 #include <linux/pci.h>
 48 
 49 #include "../comedidev.h"
 50 
 51 /* all the registers for the pci1723 board */
 52 #define PCI1723_DA(N)   ((N)<<1)        /* W: D/A register N (0 to 7) */
 53 
 54 #define PCI1723_SYN_SET  0x12           /* synchronized set register */
 55 #define PCI1723_ALL_CHNNELE_SYN_STROBE  0x12
 56                                         /* synchronized status register */
 57 
 58 #define PCI1723_RANGE_CALIBRATION_MODE 0x14
 59                                         /* range and calibration mode */
 60 #define PCI1723_RANGE_CALIBRATION_STATUS 0x14
 61                                         /* range and calibration status */
 62 
 63 #define PCI1723_CONTROL_CMD_CALIBRATION_FUN 0x16
 64                                                 /*
 65                                                  * SADC control command for
 66                                                  * calibration function
 67                                                  */
 68 #define PCI1723_STATUS_CMD_CALIBRATION_FUN 0x16
 69                                                 /*
 70                                                  * SADC control status for
 71                                                  * calibration function
 72                                                  */
 73 
 74 #define PCI1723_CALIBRATION_PARA_STROBE 0x18
 75                                         /* Calibration parameter strobe */
 76 
 77 #define PCI1723_DIGITAL_IO_PORT_SET 0x1A        /* Digital I/O port setting */
 78 #define PCI1723_DIGITAL_IO_PORT_MODE 0x1A       /* Digital I/O port mode */
 79 
 80 #define PCI1723_WRITE_DIGITAL_OUTPUT_CMD 0x1C
 81                                         /* Write digital output command */
 82 #define PCI1723_READ_DIGITAL_INPUT_DATA 0x1C    /* Read digital input data */
 83 
 84 #define PCI1723_WRITE_CAL_CMD 0x1E              /* Write calibration command */
 85 #define PCI1723_READ_CAL_STATUS 0x1E            /* Read calibration status */
 86 
 87 #define PCI1723_SYN_STROBE 0x20                 /* Synchronized strobe */
 88 
 89 #define PCI1723_RESET_ALL_CHN_STROBE 0x22
 90                                         /* Reset all D/A channels strobe */
 91 
 92 #define PCI1723_RESET_CAL_CONTROL_STROBE 0x24
 93                                                 /*
 94                                                  * Reset the calibration
 95                                                  * controller strobe
 96                                                  */
 97 
 98 #define PCI1723_CHANGE_CHA_OUTPUT_TYPE_STROBE 0x26
 99                                                 /*
100                                                  * Change D/A channels output
101                                                  * type strobe
102                                                  */
103 
104 #define PCI1723_SELECT_CALIBRATION 0x28 /* Select the calibration Ref_V */
105 
106 struct pci1723_private {
107         unsigned char da_range[8];      /* D/A output range for each channel */
108         unsigned short ao_data[8];      /* data output buffer */
109 };
110 
111 /*
112  * The pci1723 card reset;
113  */
114 static int pci1723_reset(struct comedi_device *dev)
115 {
116         struct pci1723_private *devpriv = dev->private;
117         int i;
118 
119         outw(0x01, dev->iobase + PCI1723_SYN_SET);
120                                                /* set synchronous output mode */
121 
122         for (i = 0; i < 8; i++) {
123                 /* set all outputs to 0V */
124                 devpriv->ao_data[i] = 0x8000;
125                 outw(devpriv->ao_data[i], dev->iobase + PCI1723_DA(i));
126                 /* set all ranges to +/- 10V */
127                 devpriv->da_range[i] = 0;
128                 outw(((devpriv->da_range[i] << 4) | i),
129                      PCI1723_RANGE_CALIBRATION_MODE);
130         }
131 
132         outw(0, dev->iobase + PCI1723_CHANGE_CHA_OUTPUT_TYPE_STROBE);
133                                                             /* update ranges */
134         outw(0, dev->iobase + PCI1723_SYN_STROBE);          /* update outputs */
135 
136         /* set asynchronous output mode */
137         outw(0, dev->iobase + PCI1723_SYN_SET);
138 
139         return 0;
140 }
141 
142 static int pci1723_insn_read_ao(struct comedi_device *dev,
143                                 struct comedi_subdevice *s,
144                                 struct comedi_insn *insn, unsigned int *data)
145 {
146         struct pci1723_private *devpriv = dev->private;
147         int n, chan;
148 
149         chan = CR_CHAN(insn->chanspec);
150         for (n = 0; n < insn->n; n++)
151                 data[n] = devpriv->ao_data[chan];
152 
153         return n;
154 }
155 
156 /*
157   analog data output;
158 */
159 static int pci1723_ao_write_winsn(struct comedi_device *dev,
160                                   struct comedi_subdevice *s,
161                                   struct comedi_insn *insn, unsigned int *data)
162 {
163         struct pci1723_private *devpriv = dev->private;
164         unsigned int chan = CR_CHAN(insn->chanspec);
165         int n;
166 
167         for (n = 0; n < insn->n; n++) {
168                 devpriv->ao_data[chan] = data[n];
169                 outw(data[n], dev->iobase + PCI1723_DA(chan));
170         }
171 
172         return n;
173 }
174 
175 /*
176   digital i/o config/query
177 */
178 static int pci1723_dio_insn_config(struct comedi_device *dev,
179                                    struct comedi_subdevice *s,
180                                    struct comedi_insn *insn, unsigned int *data)
181 {
182         unsigned int chan = CR_CHAN(insn->chanspec);
183         unsigned int mask;
184         unsigned short mode;
185         int ret;
186 
187         if (chan < 8)
188                 mask = 0x00ff;
189         else
190                 mask = 0xff00;
191 
192         ret = comedi_dio_insn_config(dev, s, insn, data, mask);
193         if (ret)
194                 return ret;
195 
196         /* update hardware DIO mode */
197         mode = 0x0000;                  /* assume output */
198         if (!(s->io_bits & 0x00ff))
199                 mode |= 0x0001;         /* low byte input */
200         if (!(s->io_bits & 0xff00))
201                 mode |= 0x0002;         /* high byte input */
202         outw(mode, dev->iobase + PCI1723_DIGITAL_IO_PORT_SET);
203 
204         return insn->n;
205 }
206 
207 static int pci1723_dio_insn_bits(struct comedi_device *dev,
208                                  struct comedi_subdevice *s,
209                                  struct comedi_insn *insn,
210                                  unsigned int *data)
211 {
212         if (comedi_dio_update_state(s, data))
213                 outw(s->state, dev->iobase + PCI1723_WRITE_DIGITAL_OUTPUT_CMD);
214 
215         data[1] = inw(dev->iobase + PCI1723_READ_DIGITAL_INPUT_DATA);
216 
217         return insn->n;
218 }
219 
220 static int pci1723_auto_attach(struct comedi_device *dev,
221                                          unsigned long context_unused)
222 {
223         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
224         struct pci1723_private *devpriv;
225         struct comedi_subdevice *s;
226         int ret;
227 
228         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
229         if (!devpriv)
230                 return -ENOMEM;
231 
232         ret = comedi_pci_enable(dev);
233         if (ret)
234                 return ret;
235         dev->iobase = pci_resource_start(pcidev, 2);
236 
237         ret = comedi_alloc_subdevices(dev, 2);
238         if (ret)
239                 return ret;
240 
241         s = &dev->subdevices[0];
242         dev->write_subdev = s;
243         s->type         = COMEDI_SUBD_AO;
244         s->subdev_flags = SDF_WRITEABLE | SDF_GROUND | SDF_COMMON;
245         s->n_chan       = 8;
246         s->maxdata      = 0xffff;
247         s->len_chanlist = 8;
248         s->range_table  = &range_bipolar10;
249         s->insn_write   = pci1723_ao_write_winsn;
250         s->insn_read    = pci1723_insn_read_ao;
251 
252         s = &dev->subdevices[1];
253         s->type         = COMEDI_SUBD_DIO;
254         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
255         s->n_chan       = 16;
256         s->maxdata      = 1;
257         s->len_chanlist = 16;
258         s->range_table  = &range_digital;
259         s->insn_config  = pci1723_dio_insn_config;
260         s->insn_bits    = pci1723_dio_insn_bits;
261 
262         /* read DIO config */
263         switch (inw(dev->iobase + PCI1723_DIGITAL_IO_PORT_MODE) & 0x03) {
264         case 0x00:      /* low byte output, high byte output */
265                 s->io_bits = 0xFFFF;
266                 break;
267         case 0x01:      /* low byte input, high byte output */
268                 s->io_bits = 0xFF00;
269                 break;
270         case 0x02:      /* low byte output, high byte input */
271                 s->io_bits = 0x00FF;
272                 break;
273         case 0x03:      /* low byte input, high byte input */
274                 s->io_bits = 0x0000;
275                 break;
276         }
277         /* read DIO port state */
278         s->state = inw(dev->iobase + PCI1723_READ_DIGITAL_INPUT_DATA);
279 
280         pci1723_reset(dev);
281 
282         return 0;
283 }
284 
285 static void pci1723_detach(struct comedi_device *dev)
286 {
287         if (dev->iobase)
288                 pci1723_reset(dev);
289         comedi_pci_detach(dev);
290 }
291 
292 static struct comedi_driver adv_pci1723_driver = {
293         .driver_name    = "adv_pci1723",
294         .module         = THIS_MODULE,
295         .auto_attach    = pci1723_auto_attach,
296         .detach         = pci1723_detach,
297 };
298 
299 static int adv_pci1723_pci_probe(struct pci_dev *dev,
300                                  const struct pci_device_id *id)
301 {
302         return comedi_pci_auto_config(dev, &adv_pci1723_driver,
303                                       id->driver_data);
304 }
305 
306 static const struct pci_device_id adv_pci1723_pci_table[] = {
307         { PCI_DEVICE(PCI_VENDOR_ID_ADVANTECH, 0x1723) },
308         { 0 }
309 };
310 MODULE_DEVICE_TABLE(pci, adv_pci1723_pci_table);
311 
312 static struct pci_driver adv_pci1723_pci_driver = {
313         .name           = "adv_pci1723",
314         .id_table       = adv_pci1723_pci_table,
315         .probe          = adv_pci1723_pci_probe,
316         .remove         = comedi_pci_auto_unconfig,
317 };
318 module_comedi_pci_driver(adv_pci1723_driver, adv_pci1723_pci_driver);
319 
320 MODULE_AUTHOR("Comedi http://www.comedi.org");
321 MODULE_DESCRIPTION("Comedi low-level driver");
322 MODULE_LICENSE("GPL");
323 

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