ke_counter.c revision 0707bb04be89b18ee83b5a997e36cc585f0b988d
1/* 2 comedi/drivers/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 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the Free Software 20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 22*/ 23/* 24Driver: ke_counter 25Description: Driver for Kolter Electronic Counter Card 26Devices: [Kolter Electronic] PCI Counter Card (ke_counter) 27Author: Michael Hillmann 28Updated: Mon, 14 Apr 2008 15:42:42 +0100 29Status: tested 30 31Configuration Options: 32 [0] - PCI bus of device (optional) 33 [1] - PCI slot of device (optional) 34 If bus/slot is not specified, the first supported 35 PCI device found will be used. 36 37This driver is a simple driver to read the counter values from 38Kolter Electronic PCI Counter Card. 39*/ 40 41#include "../comedidev.h" 42 43#include "comedi_pci.h" 44 45#define CNT_DRIVER_NAME "ke_counter" 46#define PCI_VENDOR_ID_KOLTER 0x1001 47#define CNT_CARD_DEVICE_ID 0x0014 48 49/*-- function prototypes ----------------------------------------------------*/ 50 51static int cnt_attach(struct comedi_device * dev, struct comedi_devconfig * it); 52static int cnt_detach(struct comedi_device * dev); 53 54static DEFINE_PCI_DEVICE_TABLE(cnt_pci_table) = { 55 {PCI_VENDOR_ID_KOLTER, CNT_CARD_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 56 0}, 57 {0} 58}; 59 60MODULE_DEVICE_TABLE(pci, cnt_pci_table); 61 62/*-- board specification structure ------------------------------------------*/ 63 64typedef struct { 65 const char *name; 66 int device_id; 67 int cnt_channel_nbr; 68 int cnt_bits; 69} cnt_board_struct; 70 71static const cnt_board_struct cnt_boards[] = { 72 { 73 name: CNT_DRIVER_NAME, 74 device_id:CNT_CARD_DEVICE_ID, 75 cnt_channel_nbr:3, 76 cnt_bits:24} 77}; 78 79#define cnt_board_nbr (sizeof(cnt_boards)/sizeof(cnt_board_struct)) 80 81/*-- device private structure -----------------------------------------------*/ 82 83typedef struct { 84 struct pci_dev *pcidev; 85} cnt_device_private; 86 87#define devpriv ((cnt_device_private *)dev->private) 88 89static struct comedi_driver cnt_driver = { 90 driver_name:CNT_DRIVER_NAME, 91 module:THIS_MODULE, 92 attach:cnt_attach, 93 detach:cnt_detach, 94}; 95 96COMEDI_PCI_INITCLEANUP(cnt_driver, cnt_pci_table); 97 98/*-- counter write ----------------------------------------------------------*/ 99 100/* This should be used only for resetting the counters; maybe it is better 101 to make a special command 'reset'. */ 102static int cnt_winsn(struct comedi_device * dev, 103 struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data) 104{ 105 int chan = CR_CHAN(insn->chanspec); 106 107 outb((unsigned char)((data[0] >> 24) & 0xff), 108 dev->iobase + chan * 0x20 + 0x10); 109 outb((unsigned char)((data[0] >> 16) & 0xff), 110 dev->iobase + chan * 0x20 + 0x0c); 111 outb((unsigned char)((data[0] >> 8) & 0xff), 112 dev->iobase + chan * 0x20 + 0x08); 113 outb((unsigned char)((data[0] >> 0) & 0xff), 114 dev->iobase + chan * 0x20 + 0x04); 115 116 /* return the number of samples written */ 117 return 1; 118} 119 120/*-- counter read -----------------------------------------------------------*/ 121 122static int cnt_rinsn(struct comedi_device * dev, 123 struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data) 124{ 125 unsigned char a0, a1, a2, a3, a4; 126 int chan = CR_CHAN(insn->chanspec); 127 int result; 128 129 a0 = inb(dev->iobase + chan * 0x20); 130 a1 = inb(dev->iobase + chan * 0x20 + 0x04); 131 a2 = inb(dev->iobase + chan * 0x20 + 0x08); 132 a3 = inb(dev->iobase + chan * 0x20 + 0x0c); 133 a4 = inb(dev->iobase + chan * 0x20 + 0x10); 134 135 result = (a1 + (a2 * 256) + (a3 * 65536)); 136 if (a4 > 0) 137 result = result - s->maxdata; 138 139 *data = (unsigned int) result; 140 141 /* return the number of samples read */ 142 return 1; 143} 144 145/*-- attach -----------------------------------------------------------------*/ 146 147static int cnt_attach(struct comedi_device * dev, struct comedi_devconfig * it) 148{ 149 struct comedi_subdevice *subdevice; 150 struct pci_dev *pci_device; 151 cnt_board_struct *board; 152 unsigned long io_base; 153 int error, i; 154 155 /* allocate device private structure */ 156 if ((error = alloc_private(dev, sizeof(cnt_device_private))) < 0) { 157 return error; 158 } 159 160 /* Probe the device to determine what device in the series it is. */ 161 for (pci_device = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL); 162 pci_device != NULL; 163 pci_device = 164 pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_device)) { 165 if (pci_device->vendor == PCI_VENDOR_ID_KOLTER) { 166 for (i = 0; i < cnt_board_nbr; i++) { 167 if (cnt_boards[i].device_id == 168 pci_device->device) { 169 /* was a particular bus/slot requested? */ 170 if ((it->options[0] != 0) 171 || (it->options[1] != 0)) { 172 /* are we on the wrong bus/slot? */ 173 if (pci_device->bus->number != 174 it->options[0] 175 || PCI_SLOT(pci_device-> 176 devfn) != 177 it->options[1]) { 178 continue; 179 } 180 } 181 182 dev->board_ptr = cnt_boards + i; 183 board = (cnt_board_struct *) dev-> 184 board_ptr; 185 goto found; 186 } 187 } 188 } 189 } 190 printk("comedi%d: no supported board found! (req. bus/slot: %d/%d)\n", 191 dev->minor, it->options[0], it->options[1]); 192 return -EIO; 193 194 found: 195 printk("comedi%d: found %s at PCI bus %d, slot %d\n", dev->minor, 196 board->name, pci_device->bus->number, 197 PCI_SLOT(pci_device->devfn)); 198 devpriv->pcidev = pci_device; 199 dev->board_name = board->name; 200 201 /* enable PCI device and request regions */ 202 if ((error = comedi_pci_enable(pci_device, CNT_DRIVER_NAME)) < 0) { 203 printk("comedi%d: failed to enable PCI device and request regions!\n", dev->minor); 204 return error; 205 } 206 207 /* read register base address [PCI_BASE_ADDRESS #0] */ 208 io_base = pci_resource_start(pci_device, 0); 209 dev->iobase = io_base; 210 211 /* allocate the subdevice structures */ 212 if ((error = alloc_subdevices(dev, 1)) < 0) { 213 return error; 214 } 215 216 subdevice = dev->subdevices + 0; 217 dev->read_subdev = subdevice; 218 219 subdevice->type = COMEDI_SUBD_COUNTER; 220 subdevice->subdev_flags = SDF_READABLE /* | SDF_COMMON */ ; 221 subdevice->n_chan = board->cnt_channel_nbr; 222 subdevice->maxdata = (1 << board->cnt_bits) - 1; 223 subdevice->insn_read = cnt_rinsn; 224 subdevice->insn_write = cnt_winsn; 225 226 // select 20MHz clock 227 outb(3, dev->iobase + 248); 228 229 // reset all counters 230 outb(0, dev->iobase); 231 outb(0, dev->iobase + 0x20); 232 outb(0, dev->iobase + 0x40); 233 234 printk("comedi%d: " CNT_DRIVER_NAME " attached.\n", dev->minor); 235 return 0; 236} 237 238/*-- detach -----------------------------------------------------------------*/ 239 240static int cnt_detach(struct comedi_device * dev) 241{ 242 if (devpriv && devpriv->pcidev) { 243 if (dev->iobase) { 244 comedi_pci_disable(devpriv->pcidev); 245 } 246 pci_dev_put(devpriv->pcidev); 247 } 248 printk("comedi%d: " CNT_DRIVER_NAME " remove\n", dev->minor); 249 return 0; 250} 251