drivers/staging/comedi/drivers/ke_counter.c

   1 /*
   2  * ke_counter.c
   3  * Comedi driver for Kolter-Electronic PCI Counter 1 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: ke_counter
  21  * Description: Driver for Kolter Electronic Counter Card
  22  * Devices: (Kolter Electronic) PCI Counter Card [ke_counter]
  23  * Author: Michael Hillmann
  24  * Updated: Mon, 14 Apr 2008 15:42:42 +0100
  25  * Status: tested
  26  *
  27  * Configuration Options: not applicable, uses PCI auto config
  28  */
  29
  30 #include <linux/module.h>
  31 #include <linux/pci.h>
  32
  33 #include "../comedidev.h"
  34
  35 /*
  36  * PCI BAR 0 Register I/O map
  37  */
  38 #define KE_RESET_REG(x)                 (0x00 + ((x) * 0x20))
  39 #define KE_LATCH_REG(x)                 (0x00 + ((x) * 0x20))
  40 #define KE_LSB_REG(x)                   (0x04 + ((x) * 0x20))
  41 #define KE_MID_REG(x)                   (0x08 + ((x) * 0x20))
  42 #define KE_MSB_REG(x)                   (0x0c + ((x) * 0x20))
  43 #define KE_SIGN_REG(x)                  (0x10 + ((x) * 0x20))
  44 #define KE_OSC_SEL_REG                  0xf8
  45 #define KE_OSC_SEL_EXT                  (1 << 0)
  46 #define KE_OSC_SEL_4MHZ                 (2 << 0)
  47 #define KE_OSC_SEL_20MHZ                (3 << 0)
  48 #define KE_DO_REG                       0xfc
  49
  50 static int ke_counter_insn_write(struct comedi_device *dev,
  51                                  struct comedi_subdevice *s,
  52                                  struct comedi_insn *insn,
  53                                  unsigned int *data)
  54 {
  55         unsigned int chan = CR_CHAN(insn->chanspec);
  56         unsigned int val;
  57         int i;
  58
  59         for (i = 0; i < insn->n; i++) {
  60                 val = data[0];
  61
  62                 /* Order matters */
  63                 outb((val >> 24) & 0xff, dev->iobase + KE_SIGN_REG(chan));
  64                 outb((val >> 16) & 0xff, dev->iobase + KE_MSB_REG(chan));
  65                 outb((val >> 8) & 0xff, dev->iobase + KE_MID_REG(chan));
  66                 outb((val >> 0) & 0xff, dev->iobase + KE_LSB_REG(chan));
  67         }
  68
  69         return insn->n;
  70 }
  71
  72 static int ke_counter_insn_read(struct comedi_device *dev,
  73                                 struct comedi_subdevice *s,
  74                                 struct comedi_insn *insn,
  75                                 unsigned int *data)
  76 {
  77         unsigned int chan = CR_CHAN(insn->chanspec);
  78         unsigned int val;
  79         int i;
  80
  81         for (i = 0; i < insn->n; i++) {
  82                 /* Order matters */
  83                 inb(dev->iobase + KE_LATCH_REG(chan));
  84
  85                 val = inb(dev->iobase + KE_LSB_REG(chan));
  86                 val |= (inb(dev->iobase + KE_MID_REG(chan)) << 8);
  87                 val |= (inb(dev->iobase + KE_MSB_REG(chan)) << 16);
  88                 val |= (inb(dev->iobase + KE_SIGN_REG(chan)) << 24);
  89
  90                 data[i] = val;
  91         }
  92
  93         return insn->n;
  94 }
  95
  96 static void ke_counter_reset(struct comedi_device *dev)
  97 {
  98         unsigned int chan;
  99
 100         for (chan = 0; chan < 3; chan++)
 101                 outb(0, dev->iobase + KE_RESET_REG(chan));
 102 }
 103
 104 static int ke_counter_insn_config(struct comedi_device *dev,
 105                                   struct comedi_subdevice *s,
 106                                   struct comedi_insn *insn,
 107                                   unsigned int *data)
 108 {
 109         unsigned char src;
 110
 111         switch (data[0]) {
 112         case INSN_CONFIG_SET_CLOCK_SRC:
 113                 switch (data[1]) {
 114                 case KE_CLK_20MHZ:      /* default */
 115                         src = KE_OSC_SEL_20MHZ;
 116                         break;
 117                 case KE_CLK_4MHZ:       /* option */
 118                         src = KE_OSC_SEL_4MHZ;
 119                         break;
 120                 case KE_CLK_EXT:        /* Pin 21 on D-sub */
 121                         src = KE_OSC_SEL_EXT;
 122                         break;
 123                 default:
 124                         return -EINVAL;
 125                 }
 126                 outb(src, dev->iobase + KE_OSC_SEL_REG);
 127                 break;
 128         case INSN_CONFIG_GET_CLOCK_SRC:
 129                 src = inb(dev->iobase + KE_OSC_SEL_REG);
 130                 switch (src) {
 131                 case KE_OSC_SEL_20MHZ:
 132                         data[1] = KE_CLK_20MHZ;
 133                         data[2] = 50;   /* 50ns */
 134                         break;
 135                 case KE_OSC_SEL_4MHZ:
 136                         data[1] = KE_CLK_4MHZ;
 137                         data[2] = 250;  /* 250ns */
 138                         break;
 139                 case KE_OSC_SEL_EXT:
 140                         data[1] = KE_CLK_EXT;
 141                         data[2] = 0;    /* Unknown */
 142                         break;
 143                 default:
 144                         return -EINVAL;
 145                 }
 146                 break;
 147         case INSN_CONFIG_RESET:
 148                 ke_counter_reset(dev);
 149                 break;
 150         default:
 151                 return -EINVAL;
 152         }
 153
 154         return insn->n;
 155 }
 156
 157 static int ke_counter_do_insn_bits(struct comedi_device *dev,
 158                                    struct comedi_subdevice *s,
 159                                    struct comedi_insn *insn,
 160                                    unsigned int *data)
 161 {
 162         if (comedi_dio_update_state(s, data))
 163                 outb(s->state, dev->iobase + KE_DO_REG);
 164
 165         data[1] = s->state;
 166
 167         return insn->n;
 168 }
 169
 170 static int ke_counter_auto_attach(struct comedi_device *dev,
 171                                   unsigned long context_unused)
 172 {
 173         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 174         struct comedi_subdevice *s;
 175         int ret;
 176
 177         ret = comedi_pci_enable(dev);
 178         if (ret)
 179                 return ret;
 180         dev->iobase = pci_resource_start(pcidev, 0);
 181
 182         ret = comedi_alloc_subdevices(dev, 2);
 183         if (ret)
 184                 return ret;
 185
 186         s = &dev->subdevices[0];
 187         s->type         = COMEDI_SUBD_COUNTER;
 188         s->subdev_flags = SDF_READABLE;
 189         s->n_chan       = 3;
 190         s->maxdata      = 0x01ffffff;
 191         s->range_table  = &range_unknown;
 192         s->insn_read    = ke_counter_insn_read;
 193         s->insn_write   = ke_counter_insn_write;
 194         s->insn_config  = ke_counter_insn_config;
 195
 196         s = &dev->subdevices[1];
 197         s->type         = COMEDI_SUBD_DO;
 198         s->subdev_flags = SDF_WRITABLE;
 199         s->n_chan       = 3;
 200         s->maxdata      = 1;
 201         s->range_table  = &range_digital;
 202         s->insn_bits    = ke_counter_do_insn_bits;
 203
 204         outb(KE_OSC_SEL_20MHZ, dev->iobase + KE_OSC_SEL_REG);
 205
 206         ke_counter_reset(dev);
 207
 208         return 0;
 209 }
 210
 211 static struct comedi_driver ke_counter_driver = {
 212         .driver_name    = "ke_counter",
 213         .module         = THIS_MODULE,
 214         .auto_attach    = ke_counter_auto_attach,
 215         .detach         = comedi_pci_detach,
 216 };
 217
 218 static int ke_counter_pci_probe(struct pci_dev *dev,
 219                                 const struct pci_device_id *id)
 220 {
 221         return comedi_pci_auto_config(dev, &ke_counter_driver,
 222                                       id->driver_data);
 223 }
 224
 225 static const struct pci_device_id ke_counter_pci_table[] = {
 226         { PCI_DEVICE(PCI_VENDOR_ID_KOLTER, 0x0014) },
 227         { 0 }
 228 };
 229 MODULE_DEVICE_TABLE(pci, ke_counter_pci_table);
 230
 231 static struct pci_driver ke_counter_pci_driver = {
 232         .name           = "ke_counter",
 233         .id_table       = ke_counter_pci_table,
 234         .probe          = ke_counter_pci_probe,
 235         .remove         = comedi_pci_auto_unconfig,
 236 };
 237 module_comedi_pci_driver(ke_counter_driver, ke_counter_pci_driver);
 238
 239 MODULE_AUTHOR("Comedi http://www.comedi.org");
 240 MODULE_DESCRIPTION("Comedi driver for Kolter Electronic Counter Card");
 241 MODULE_LICENSE("GPL");