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

  1 /*
  2  * adv_pci1723.c
  3  * Comedi driver for the Advantech PCI-1723 card.
  4  *
  5  * COMEDI - Linux Control and Measurement Device Interface
  6  * Copyright (C) 2000 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 
 19 /*
 20  * Driver: adv_pci1723
 21  * Description: Advantech PCI-1723
 22  * Author: yonggang <rsmgnu@gmail.com>, Ian Abbott <abbotti@mev.co.uk>
 23  * Devices: [Advantech] PCI-1723 (adv_pci1723)
 24  * Updated: Mon, 14 Apr 2008 15:12:56 +0100
 25  * Status: works
 26  *
 27  * Configuration Options: not applicable, uses comedi PCI auto config
 28  *
 29  * Subdevice 0 is 8-channel AO, 16-bit, range +/- 10 V.
 30  *
 31  * Subdevice 1 is 16-channel DIO.  The channels are configurable as
 32  * input or output in 2 groups (0 to 7, 8 to 15). Configuring any
 33  * channel implicitly configures all channels in the same group.
 34  *
 35  * TODO:
 36  * 1. Add the two milliamp ranges to the AO subdevice (0 to 20 mA,
 37  *    4 to 20 mA).
 38  * 2. Read the initial ranges and values of the AO subdevice at
 39  *    start-up instead of reinitializing them.
 40  * 3. Implement calibration.
 41  */
 42 
 43 #include <linux/module.h>
 44 
 45 #include "../comedi_pci.h"
 46 
 47 /*
 48  * PCI Bar 2 I/O Register map (dev->iobase)
 49  */
 50 #define PCI1723_AO_REG(x)               (0x00 + ((x) * 2))
 51 #define PCI1723_BOARD_ID_REG            0x10
 52 #define PCI1723_BOARD_ID_MASK           (0xf << 0)
 53 #define PCI1723_SYNC_CTRL_REG           0x12
 54 #define PCI1723_SYNC_CTRL(x)            (((x) & 0x1) << 0)
 55 #define PCI1723_SYNC_CTRL_ASYNC         PCI1723_SYNC_CTRL(0)
 56 #define PCI1723_SYNC_CTRL_SYNC          PCI1723_SYNC_CTRL(1)
 57 #define PCI1723_CTRL_REG                0x14
 58 #define PCI1723_CTRL_BUSY               BIT(15)
 59 #define PCI1723_CTRL_INIT               BIT(14)
 60 #define PCI1723_CTRL_SELF               BIT(8)
 61 #define PCI1723_CTRL_IDX(x)             (((x) & 0x3) << 6)
 62 #define PCI1723_CTRL_RANGE(x)           (((x) & 0x3) << 4)
 63 #define PCI1723_CTRL_SEL(x)             (((x) & 0x1) << 3)
 64 #define PCI1723_CTRL_GAIN               PCI1723_CTRL_SEL(0)
 65 #define PCI1723_CTRL_OFFSET             PCI1723_CTRL_SEL(1)
 66 #define PCI1723_CTRL_CHAN(x)            (((x) & 0x7) << 0)
 67 #define PCI1723_CALIB_CTRL_REG          0x16
 68 #define PCI1723_CALIB_CTRL_CS           BIT(2)
 69 #define PCI1723_CALIB_CTRL_DAT          BIT(1)
 70 #define PCI1723_CALIB_CTRL_CLK          BIT(0)
 71 #define PCI1723_CALIB_STROBE_REG        0x18
 72 #define PCI1723_DIO_CTRL_REG            0x1a
 73 #define PCI1723_DIO_CTRL_HDIO           BIT(1)
 74 #define PCI1723_DIO_CTRL_LDIO           BIT(0)
 75 #define PCI1723_DIO_DATA_REG            0x1c
 76 #define PCI1723_CALIB_DATA_REG          0x1e
 77 #define PCI1723_SYNC_STROBE_REG         0x20
 78 #define PCI1723_RESET_AO_STROBE_REG     0x22
 79 #define PCI1723_RESET_CALIB_STROBE_REG  0x24
 80 #define PCI1723_RANGE_STROBE_REG        0x26
 81 #define PCI1723_VREF_REG                0x28
 82 #define PCI1723_VREF(x)                 (((x) & 0x3) << 0)
 83 #define PCI1723_VREF_NEG10V             PCI1723_VREF(0)
 84 #define PCI1723_VREF_0V                 PCI1723_VREF(1)
 85 #define PCI1723_VREF_POS10V             PCI1723_VREF(3)
 86 
 87 static int pci1723_ao_insn_write(struct comedi_device *dev,
 88                                  struct comedi_subdevice *s,
 89                                  struct comedi_insn *insn,
 90                                  unsigned int *data)
 91 {
 92         unsigned int chan = CR_CHAN(insn->chanspec);
 93         int i;
 94 
 95         for (i = 0; i < insn->n; i++) {
 96                 unsigned int val = data[i];
 97 
 98                 outw(val, dev->iobase + PCI1723_AO_REG(chan));
 99                 s->readback[chan] = val;
100         }
101 
102         return insn->n;
103 }
104 
105 static int pci1723_dio_insn_config(struct comedi_device *dev,
106                                    struct comedi_subdevice *s,
107                                    struct comedi_insn *insn,
108                                    unsigned int *data)
109 {
110         unsigned int chan = CR_CHAN(insn->chanspec);
111         unsigned int mask = (chan < 8) ? 0x00ff : 0xff00;
112         unsigned short mode = 0x0000;           /* assume output */
113         int ret;
114 
115         ret = comedi_dio_insn_config(dev, s, insn, data, mask);
116         if (ret)
117                 return ret;
118 
119         if (!(s->io_bits & 0x00ff))
120                 mode |= PCI1723_DIO_CTRL_LDIO;  /* low byte input */
121         if (!(s->io_bits & 0xff00))
122                 mode |= PCI1723_DIO_CTRL_HDIO;  /* high byte input */
123         outw(mode, dev->iobase + PCI1723_DIO_CTRL_REG);
124 
125         return insn->n;
126 }
127 
128 static int pci1723_dio_insn_bits(struct comedi_device *dev,
129                                  struct comedi_subdevice *s,
130                                  struct comedi_insn *insn,
131                                  unsigned int *data)
132 {
133         if (comedi_dio_update_state(s, data))
134                 outw(s->state, dev->iobase + PCI1723_DIO_DATA_REG);
135 
136         data[1] = inw(dev->iobase + PCI1723_DIO_DATA_REG);
137 
138         return insn->n;
139 }
140 
141 static int pci1723_auto_attach(struct comedi_device *dev,
142                                unsigned long context_unused)
143 {
144         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
145         struct comedi_subdevice *s;
146         unsigned int val;
147         int ret;
148         int i;
149 
150         ret = comedi_pci_enable(dev);
151         if (ret)
152                 return ret;
153         dev->iobase = pci_resource_start(pcidev, 2);
154 
155         ret = comedi_alloc_subdevices(dev, 2);
156         if (ret)
157                 return ret;
158 
159         s = &dev->subdevices[0];
160         s->type         = COMEDI_SUBD_AO;
161         s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_COMMON;
162         s->n_chan       = 8;
163         s->maxdata      = 0xffff;
164         s->range_table  = &range_bipolar10;
165         s->insn_write   = pci1723_ao_insn_write;
166 
167         ret = comedi_alloc_subdev_readback(s);
168         if (ret)
169                 return ret;
170 
171         /* synchronously reset all analog outputs to 0V, +/-10V range */
172         outw(PCI1723_SYNC_CTRL_SYNC, dev->iobase + PCI1723_SYNC_CTRL_REG);
173         for (i = 0; i < s->n_chan; i++) {
174                 outw(PCI1723_CTRL_RANGE(0) | PCI1723_CTRL_CHAN(i),
175                      PCI1723_CTRL_REG);
176                 outw(0, dev->iobase + PCI1723_RANGE_STROBE_REG);
177 
178                 outw(0x8000, dev->iobase + PCI1723_AO_REG(i));
179                 s->readback[i] = 0x8000;
180         }
181         outw(0, dev->iobase + PCI1723_SYNC_STROBE_REG);
182 
183         /* disable syncronous control */
184         outw(PCI1723_SYNC_CTRL_ASYNC, dev->iobase + PCI1723_SYNC_CTRL_REG);
185 
186         s = &dev->subdevices[1];
187         s->type         = COMEDI_SUBD_DIO;
188         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
189         s->n_chan       = 16;
190         s->maxdata      = 1;
191         s->range_table  = &range_digital;
192         s->insn_config  = pci1723_dio_insn_config;
193         s->insn_bits    = pci1723_dio_insn_bits;
194 
195         /* get initial DIO direction and state */
196         val = inw(dev->iobase + PCI1723_DIO_CTRL_REG);
197         if (!(val & PCI1723_DIO_CTRL_LDIO))
198                 s->io_bits |= 0x00ff;   /* low byte output */
199         if (!(val & PCI1723_DIO_CTRL_HDIO))
200                 s->io_bits |= 0xff00;   /* high byte output */
201         s->state = inw(dev->iobase + PCI1723_DIO_DATA_REG);
202 
203         return 0;
204 }
205 
206 static struct comedi_driver adv_pci1723_driver = {
207         .driver_name    = "adv_pci1723",
208         .module         = THIS_MODULE,
209         .auto_attach    = pci1723_auto_attach,
210         .detach         = comedi_pci_detach,
211 };
212 
213 static int adv_pci1723_pci_probe(struct pci_dev *dev,
214                                  const struct pci_device_id *id)
215 {
216         return comedi_pci_auto_config(dev, &adv_pci1723_driver,
217                                       id->driver_data);
218 }
219 
220 static const struct pci_device_id adv_pci1723_pci_table[] = {
221         { PCI_DEVICE(PCI_VENDOR_ID_ADVANTECH, 0x1723) },
222         { 0 }
223 };
224 MODULE_DEVICE_TABLE(pci, adv_pci1723_pci_table);
225 
226 static struct pci_driver adv_pci1723_pci_driver = {
227         .name           = "adv_pci1723",
228         .id_table       = adv_pci1723_pci_table,
229         .probe          = adv_pci1723_pci_probe,
230         .remove         = comedi_pci_auto_unconfig,
231 };
232 module_comedi_pci_driver(adv_pci1723_driver, adv_pci1723_pci_driver);
233 
234 MODULE_AUTHOR("Comedi http://www.comedi.org");
235 MODULE_DESCRIPTION("Advantech PCI-1723 Comedi driver");
236 MODULE_LICENSE("GPL");
237 

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