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Linux/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 #include <linux/pci.h>
 32 
 33 #include "../comedidev.h"
 34 
 35 #define PCI8164_AXIS(x)         ((x) * 0x08)
 36 #define PCI8164_CMD_MSTS_REG    0x00
 37 #define PCI8164_OTP_SSTS_REG    0x02
 38 #define PCI8164_BUF0_REG        0x04
 39 #define PCI8164_BUF1_REG        0x06
 40 
 41 static int adl_pci8164_insn_read(struct comedi_device *dev,
 42                                  struct comedi_subdevice *s,
 43                                  struct comedi_insn *insn,
 44                                  unsigned int *data)
 45 {
 46         unsigned long offset = (unsigned long)s->private;
 47         unsigned int chan = CR_CHAN(insn->chanspec);
 48         int i;
 49 
 50         for (i = 0; i < insn->n; i++)
 51                 data[i] = inw(dev->iobase + PCI8164_AXIS(chan) + offset);
 52 
 53         return insn->n;
 54 }
 55 
 56 static int adl_pci8164_insn_write(struct comedi_device *dev,
 57                                   struct comedi_subdevice *s,
 58                                   struct comedi_insn *insn,
 59                                   unsigned int *data)
 60 {
 61         unsigned long offset = (unsigned long)s->private;
 62         unsigned int chan = CR_CHAN(insn->chanspec);
 63         int i;
 64 
 65         for (i = 0; i < insn->n; i++)
 66                 outw(data[i], dev->iobase + PCI8164_AXIS(chan) + offset);
 67 
 68         return insn->n;
 69 }
 70 
 71 static int adl_pci8164_auto_attach(struct comedi_device *dev,
 72                                              unsigned long context_unused)
 73 {
 74         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 75         struct comedi_subdevice *s;
 76         int ret;
 77 
 78         ret = comedi_pci_enable(dev);
 79         if (ret)
 80                 return ret;
 81         dev->iobase = pci_resource_start(pcidev, 2);
 82 
 83         ret = comedi_alloc_subdevices(dev, 4);
 84         if (ret)
 85                 return ret;
 86 
 87         /* read MSTS register / write CMD register for each axis (channel) */
 88         s = &dev->subdevices[0];
 89         s->type         = COMEDI_SUBD_PROC;
 90         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 91         s->n_chan       = 4;
 92         s->maxdata      = 0xffff;
 93         s->len_chanlist = 4;
 94         s->insn_read    = adl_pci8164_insn_read;
 95         s->insn_write   = adl_pci8164_insn_write;
 96         s->private      = (void *)PCI8164_CMD_MSTS_REG;
 97 
 98         /* read SSTS register / write OTP register for each axis (channel) */
 99         s = &dev->subdevices[1];
100         s->type         = COMEDI_SUBD_PROC;
101         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
102         s->n_chan       = 4;
103         s->maxdata      = 0xffff;
104         s->len_chanlist = 4;
105         s->insn_read    = adl_pci8164_insn_read;
106         s->insn_write   = adl_pci8164_insn_write;
107         s->private      = (void *)PCI8164_OTP_SSTS_REG;
108 
109         /* read/write BUF0 register for each axis (channel) */
110         s = &dev->subdevices[2];
111         s->type         = COMEDI_SUBD_PROC;
112         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
113         s->n_chan       = 4;
114         s->maxdata      = 0xffff;
115         s->len_chanlist = 4;
116         s->insn_read    = adl_pci8164_insn_read;
117         s->insn_write   = adl_pci8164_insn_write;
118         s->private      = (void *)PCI8164_BUF0_REG;
119 
120         /* read/write BUF1 register for each axis (channel) */
121         s = &dev->subdevices[3];
122         s->type         = COMEDI_SUBD_PROC;
123         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
124         s->n_chan       = 4;
125         s->maxdata      = 0xffff;
126         s->len_chanlist = 4;
127         s->insn_read    = adl_pci8164_insn_read;
128         s->insn_write   = adl_pci8164_insn_write;
129         s->private      = (void *)PCI8164_BUF1_REG;
130 
131         return 0;
132 }
133 
134 static struct comedi_driver adl_pci8164_driver = {
135         .driver_name    = "adl_pci8164",
136         .module         = THIS_MODULE,
137         .auto_attach    = adl_pci8164_auto_attach,
138         .detach         = comedi_pci_detach,
139 };
140 
141 static int adl_pci8164_pci_probe(struct pci_dev *dev,
142                                  const struct pci_device_id *id)
143 {
144         return comedi_pci_auto_config(dev, &adl_pci8164_driver,
145                                       id->driver_data);
146 }
147 
148 static const struct pci_device_id adl_pci8164_pci_table[] = {
149         { PCI_DEVICE(PCI_VENDOR_ID_ADLINK, 0x8164) },
150         { 0 }
151 };
152 MODULE_DEVICE_TABLE(pci, adl_pci8164_pci_table);
153 
154 static struct pci_driver adl_pci8164_pci_driver = {
155         .name           = "adl_pci8164",
156         .id_table       = adl_pci8164_pci_table,
157         .probe          = adl_pci8164_pci_probe,
158         .remove         = comedi_pci_auto_unconfig,
159 };
160 module_comedi_pci_driver(adl_pci8164_driver, adl_pci8164_pci_driver);
161 
162 MODULE_AUTHOR("Comedi http://www.comedi.org");
163 MODULE_DESCRIPTION("Comedi low-level driver");
164 MODULE_LICENSE("GPL");
165 

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