drivers/staging/comedi/drivers/adl_pci8164.c

   1 /*
   2  * comedi/drivers/adl_pci8164.c
   3  *
   4  * Hardware comedi driver for PCI-8164 Adlink card
   5  * Copyright (C) 2004 Michel Lachine <mike@mikelachaine.ca>
   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 /*
  19  * Driver: adl_pci8164
  20  * Description: Driver for the Adlink PCI-8164 4 Axes Motion Control board
  21  * Devices: [ADLink] PCI-8164 (adl_pci8164)
  22  * Author: Michel Lachaine <mike@mikelachaine.ca>
  23  * Status: experimental
  24  * Updated: Mon, 14 Apr 2008 15:10:32 +0100
  25  *
  26  * Configuration Options: not applicable, uses PCI auto config
  27  */
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31
  32 #include "../comedi_pci.h"
  33
  34 #define PCI8164_AXIS(x)         ((x) * 0x08)
  35 #define PCI8164_CMD_MSTS_REG    0x00
  36 #define PCI8164_OTP_SSTS_REG    0x02
  37 #define PCI8164_BUF0_REG        0x04
  38 #define PCI8164_BUF1_REG        0x06
  39
  40 static int adl_pci8164_insn_read(struct comedi_device *dev,
  41                                  struct comedi_subdevice *s,
  42                                  struct comedi_insn *insn,
  43                                  unsigned int *data)
  44 {
  45         unsigned long offset = (unsigned long)s->private;
  46         unsigned int chan = CR_CHAN(insn->chanspec);
  47         int i;
  48
  49         for (i = 0; i < insn->n; i++)
  50                 data[i] = inw(dev->iobase + PCI8164_AXIS(chan) + offset);
  51
  52         return insn->n;
  53 }
  54
  55 static int adl_pci8164_insn_write(struct comedi_device *dev,
  56                                   struct comedi_subdevice *s,
  57                                   struct comedi_insn *insn,
  58                                   unsigned int *data)
  59 {
  60         unsigned long offset = (unsigned long)s->private;
  61         unsigned int chan = CR_CHAN(insn->chanspec);
  62         int i;
  63
  64         for (i = 0; i < insn->n; i++)
  65                 outw(data[i], dev->iobase + PCI8164_AXIS(chan) + offset);
  66
  67         return insn->n;
  68 }
  69
  70 static int adl_pci8164_auto_attach(struct comedi_device *dev,
  71                                    unsigned long context_unused)
  72 {
  73         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
  74         struct comedi_subdevice *s;
  75         int ret;
  76
  77         ret = comedi_pci_enable(dev);
  78         if (ret)
  79                 return ret;
  80         dev->iobase = pci_resource_start(pcidev, 2);
  81
  82         ret = comedi_alloc_subdevices(dev, 4);
  83         if (ret)
  84                 return ret;
  85
  86         /* read MSTS register / write CMD register for each axis (channel) */
  87         s = &dev->subdevices[0];
  88         s->type         = COMEDI_SUBD_PROC;
  89         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
  90         s->n_chan       = 4;
  91         s->maxdata      = 0xffff;
  92         s->len_chanlist = 4;
  93         s->insn_read    = adl_pci8164_insn_read;
  94         s->insn_write   = adl_pci8164_insn_write;
  95         s->private      = (void *)PCI8164_CMD_MSTS_REG;
  96
  97         /* read SSTS register / write OTP register for each axis (channel) */
  98         s = &dev->subdevices[1];
  99         s->type         = COMEDI_SUBD_PROC;
 100         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 101         s->n_chan       = 4;
 102         s->maxdata      = 0xffff;
 103         s->len_chanlist = 4;
 104         s->insn_read    = adl_pci8164_insn_read;
 105         s->insn_write   = adl_pci8164_insn_write;
 106         s->private      = (void *)PCI8164_OTP_SSTS_REG;
 107
 108         /* read/write BUF0 register for each axis (channel) */
 109         s = &dev->subdevices[2];
 110         s->type         = COMEDI_SUBD_PROC;
 111         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 112         s->n_chan       = 4;
 113         s->maxdata      = 0xffff;
 114         s->len_chanlist = 4;
 115         s->insn_read    = adl_pci8164_insn_read;
 116         s->insn_write   = adl_pci8164_insn_write;
 117         s->private      = (void *)PCI8164_BUF0_REG;
 118
 119         /* read/write BUF1 register for each axis (channel) */
 120         s = &dev->subdevices[3];
 121         s->type         = COMEDI_SUBD_PROC;
 122         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 123         s->n_chan       = 4;
 124         s->maxdata      = 0xffff;
 125         s->len_chanlist = 4;
 126         s->insn_read    = adl_pci8164_insn_read;
 127         s->insn_write   = adl_pci8164_insn_write;
 128         s->private      = (void *)PCI8164_BUF1_REG;
 129
 130         return 0;
 131 }
 132
 133 static struct comedi_driver adl_pci8164_driver = {
 134         .driver_name    = "adl_pci8164",
 135         .module         = THIS_MODULE,
 136         .auto_attach    = adl_pci8164_auto_attach,
 137         .detach         = comedi_pci_detach,
 138 };
 139
 140 static int adl_pci8164_pci_probe(struct pci_dev *dev,
 141                                  const struct pci_device_id *id)
 142 {
 143         return comedi_pci_auto_config(dev, &adl_pci8164_driver,
 144                                       id->driver_data);
 145 }
 146
 147 static const struct pci_device_id adl_pci8164_pci_table[] = {
 148         { PCI_DEVICE(PCI_VENDOR_ID_ADLINK, 0x8164) },
 149         { 0 }
 150 };
 151 MODULE_DEVICE_TABLE(pci, adl_pci8164_pci_table);
 152
 153 static struct pci_driver adl_pci8164_pci_driver = {
 154         .name           = "adl_pci8164",
 155         .id_table       = adl_pci8164_pci_table,
 156         .probe          = adl_pci8164_pci_probe,
 157         .remove         = comedi_pci_auto_unconfig,
 158 };
 159 module_comedi_pci_driver(adl_pci8164_driver, adl_pci8164_pci_driver);
 160
 161 MODULE_AUTHOR("Comedi http://www.comedi.org");
 162 MODULE_DESCRIPTION("Comedi low-level driver");
 163 MODULE_LICENSE("GPL");