drivers/staging/comedi/drivers/ke_counter.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * ke_counter.c
   4  * Comedi driver for Kolter-Electronic PCI Counter 1 Card
   5  *
   6  * COMEDI - Linux Control and Measurement Device Interface
   7  * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
   8  */
   9
  10 /*
  11  * Driver: ke_counter
  12  * Description: Driver for Kolter Electronic Counter Card
  13  * Devices: [Kolter Electronic] PCI Counter Card (ke_counter)
  14  * Author: Michael Hillmann
  15  * Updated: Mon, 14 Apr 2008 15:42:42 +0100
  16  * Status: tested
  17  *
  18  * Configuration Options: not applicable, uses PCI auto config
  19  */
  20
  21 #include <linux/module.h>
  22
  23 #include "../comedi_pci.h"
  24
  25 /*
  26  * PCI BAR 0 Register I/O map
  27  */
  28 #define KE_RESET_REG(x)                 (0x00 + ((x) * 0x20))
  29 #define KE_LATCH_REG(x)                 (0x00 + ((x) * 0x20))
  30 #define KE_LSB_REG(x)                   (0x04 + ((x) * 0x20))
  31 #define KE_MID_REG(x)                   (0x08 + ((x) * 0x20))
  32 #define KE_MSB_REG(x)                   (0x0c + ((x) * 0x20))
  33 #define KE_SIGN_REG(x)                  (0x10 + ((x) * 0x20))
  34 #define KE_OSC_SEL_REG                  0xf8
  35 #define KE_OSC_SEL_CLK(x)               (((x) & 0x3) << 0)
  36 #define KE_OSC_SEL_EXT                  KE_OSC_SEL_CLK(1)
  37 #define KE_OSC_SEL_4MHZ                 KE_OSC_SEL_CLK(2)
  38 #define KE_OSC_SEL_20MHZ                KE_OSC_SEL_CLK(3)
  39 #define KE_DO_REG                       0xfc
  40
  41 static int ke_counter_insn_write(struct comedi_device *dev,
  42                                  struct comedi_subdevice *s,
  43                                  struct comedi_insn *insn,
  44                                  unsigned int *data)
  45 {
  46         unsigned int chan = CR_CHAN(insn->chanspec);
  47         unsigned int val;
  48         int i;
  49
  50         for (i = 0; i < insn->n; i++) {
  51                 val = data[0];
  52
  53                 /* Order matters */
  54                 outb((val >> 24) & 0xff, dev->iobase + KE_SIGN_REG(chan));
  55                 outb((val >> 16) & 0xff, dev->iobase + KE_MSB_REG(chan));
  56                 outb((val >> 8) & 0xff, dev->iobase + KE_MID_REG(chan));
  57                 outb((val >> 0) & 0xff, dev->iobase + KE_LSB_REG(chan));
  58         }
  59
  60         return insn->n;
  61 }
  62
  63 static int ke_counter_insn_read(struct comedi_device *dev,
  64                                 struct comedi_subdevice *s,
  65                                 struct comedi_insn *insn,
  66                                 unsigned int *data)
  67 {
  68         unsigned int chan = CR_CHAN(insn->chanspec);
  69         unsigned int val;
  70         int i;
  71
  72         for (i = 0; i < insn->n; i++) {
  73                 /* Order matters */
  74                 inb(dev->iobase + KE_LATCH_REG(chan));
  75
  76                 val = inb(dev->iobase + KE_LSB_REG(chan));
  77                 val |= (inb(dev->iobase + KE_MID_REG(chan)) << 8);
  78                 val |= (inb(dev->iobase + KE_MSB_REG(chan)) << 16);
  79                 val |= (inb(dev->iobase + KE_SIGN_REG(chan)) << 24);
  80
  81                 data[i] = val;
  82         }
  83
  84         return insn->n;
  85 }
  86
  87 static void ke_counter_reset(struct comedi_device *dev)
  88 {
  89         unsigned int chan;
  90
  91         for (chan = 0; chan < 3; chan++)
  92                 outb(0, dev->iobase + KE_RESET_REG(chan));
  93 }
  94
  95 static int ke_counter_insn_config(struct comedi_device *dev,
  96                                   struct comedi_subdevice *s,
  97                                   struct comedi_insn *insn,
  98                                   unsigned int *data)
  99 {
 100         unsigned char src;
 101
 102         switch (data[0]) {
 103         case INSN_CONFIG_SET_CLOCK_SRC:
 104                 switch (data[1]) {
 105                 case KE_CLK_20MHZ:      /* default */
 106                         src = KE_OSC_SEL_20MHZ;
 107                         break;
 108                 case KE_CLK_4MHZ:       /* option */
 109                         src = KE_OSC_SEL_4MHZ;
 110                         break;
 111                 case KE_CLK_EXT:        /* Pin 21 on D-sub */
 112                         src = KE_OSC_SEL_EXT;
 113                         break;
 114                 default:
 115                         return -EINVAL;
 116                 }
 117                 outb(src, dev->iobase + KE_OSC_SEL_REG);
 118                 break;
 119         case INSN_CONFIG_GET_CLOCK_SRC:
 120                 src = inb(dev->iobase + KE_OSC_SEL_REG);
 121                 switch (src) {
 122                 case KE_OSC_SEL_20MHZ:
 123                         data[1] = KE_CLK_20MHZ;
 124                         data[2] = 50;   /* 50ns */
 125                         break;
 126                 case KE_OSC_SEL_4MHZ:
 127                         data[1] = KE_CLK_4MHZ;
 128                         data[2] = 250;  /* 250ns */
 129                         break;
 130                 case KE_OSC_SEL_EXT:
 131                         data[1] = KE_CLK_EXT;
 132                         data[2] = 0;    /* Unknown */
 133                         break;
 134                 default:
 135                         return -EINVAL;
 136                 }
 137                 break;
 138         case INSN_CONFIG_RESET:
 139                 ke_counter_reset(dev);
 140                 break;
 141         default:
 142                 return -EINVAL;
 143         }
 144
 145         return insn->n;
 146 }
 147
 148 static int ke_counter_do_insn_bits(struct comedi_device *dev,
 149                                    struct comedi_subdevice *s,
 150                                    struct comedi_insn *insn,
 151                                    unsigned int *data)
 152 {
 153         if (comedi_dio_update_state(s, data))
 154                 outb(s->state, dev->iobase + KE_DO_REG);
 155
 156         data[1] = s->state;
 157
 158         return insn->n;
 159 }
 160
 161 static int ke_counter_auto_attach(struct comedi_device *dev,
 162                                   unsigned long context_unused)
 163 {
 164         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 165         struct comedi_subdevice *s;
 166         int ret;
 167
 168         ret = comedi_pci_enable(dev);
 169         if (ret)
 170                 return ret;
 171         dev->iobase = pci_resource_start(pcidev, 0);
 172
 173         ret = comedi_alloc_subdevices(dev, 2);
 174         if (ret)
 175                 return ret;
 176
 177         s = &dev->subdevices[0];
 178         s->type         = COMEDI_SUBD_COUNTER;
 179         s->subdev_flags = SDF_READABLE;
 180         s->n_chan       = 3;
 181         s->maxdata      = 0x01ffffff;
 182         s->range_table  = &range_unknown;
 183         s->insn_read    = ke_counter_insn_read;
 184         s->insn_write   = ke_counter_insn_write;
 185         s->insn_config  = ke_counter_insn_config;
 186
 187         s = &dev->subdevices[1];
 188         s->type         = COMEDI_SUBD_DO;
 189         s->subdev_flags = SDF_WRITABLE;
 190         s->n_chan       = 3;
 191         s->maxdata      = 1;
 192         s->range_table  = &range_digital;
 193         s->insn_bits    = ke_counter_do_insn_bits;
 194
 195         outb(KE_OSC_SEL_20MHZ, dev->iobase + KE_OSC_SEL_REG);
 196
 197         ke_counter_reset(dev);
 198
 199         return 0;
 200 }
 201
 202 static struct comedi_driver ke_counter_driver = {
 203         .driver_name    = "ke_counter",
 204         .module         = THIS_MODULE,
 205         .auto_attach    = ke_counter_auto_attach,
 206         .detach         = comedi_pci_detach,
 207 };
 208
 209 static int ke_counter_pci_probe(struct pci_dev *dev,
 210                                 const struct pci_device_id *id)
 211 {
 212         return comedi_pci_auto_config(dev, &ke_counter_driver,
 213                                       id->driver_data);
 214 }
 215
 216 static const struct pci_device_id ke_counter_pci_table[] = {
 217         { PCI_DEVICE(PCI_VENDOR_ID_KOLTER, 0x0014) },
 218         { 0 }
 219 };
 220 MODULE_DEVICE_TABLE(pci, ke_counter_pci_table);
 221
 222 static struct pci_driver ke_counter_pci_driver = {
 223         .name           = "ke_counter",
 224         .id_table       = ke_counter_pci_table,
 225         .probe          = ke_counter_pci_probe,
 226         .remove         = comedi_pci_auto_unconfig,
 227 };
 228 module_comedi_pci_driver(ke_counter_driver, ke_counter_pci_driver);
 229
 230 MODULE_AUTHOR("Comedi https://www.comedi.org");
 231 MODULE_DESCRIPTION("Comedi driver for Kolter Electronic Counter Card");
 232 MODULE_LICENSE("GPL");