ke_counter.c revision 90f703d30dd3e0c16ff80f35e34e511385a05ad5
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 { 56 PCI_VENDOR_ID_KOLTER, CNT_CARD_DEVICE_ID, PCI_ANY_ID, 57 PCI_ANY_ID, 0, 0, 0}, { 58 0} 59}; 60 61MODULE_DEVICE_TABLE(pci, cnt_pci_table); 62 63/*-- board specification structure ------------------------------------------*/ 64 65struct cnt_board_struct { 66 67 const char *name; 68 int device_id; 69 int cnt_channel_nbr; 70 int cnt_bits; 71}; 72 73static const struct cnt_board_struct cnt_boards[] = { 74 { 75 .name = CNT_DRIVER_NAME, 76 .device_id = CNT_CARD_DEVICE_ID, 77 .cnt_channel_nbr = 3, 78 .cnt_bits = 24} 79}; 80 81#define cnt_board_nbr (sizeof(cnt_boards)/sizeof(struct cnt_board_struct)) 82 83/*-- device private structure -----------------------------------------------*/ 84 85struct cnt_device_private { 86 87 struct pci_dev *pcidev; 88}; 89 90#define devpriv ((struct cnt_device_private *)dev->private) 91 92static struct comedi_driver cnt_driver = { 93 .driver_name = CNT_DRIVER_NAME, 94 .module = THIS_MODULE, 95 .attach = cnt_attach, 96 .detach = cnt_detach, 97}; 98 99COMEDI_PCI_INITCLEANUP(cnt_driver, cnt_pci_table); 100 101/*-- counter write ----------------------------------------------------------*/ 102 103/* This should be used only for resetting the counters; maybe it is better 104 to make a special command 'reset'. */ 105static int cnt_winsn(struct comedi_device *dev, 106 struct comedi_subdevice *s, struct comedi_insn *insn, 107 unsigned int *data) 108{ 109 int chan = CR_CHAN(insn->chanspec); 110 111 outb((unsigned char)((data[0] >> 24) & 0xff), 112 dev->iobase + chan * 0x20 + 0x10); 113 outb((unsigned char)((data[0] >> 16) & 0xff), 114 dev->iobase + chan * 0x20 + 0x0c); 115 outb((unsigned char)((data[0] >> 8) & 0xff), 116 dev->iobase + chan * 0x20 + 0x08); 117 outb((unsigned char)((data[0] >> 0) & 0xff), 118 dev->iobase + chan * 0x20 + 0x04); 119 120 /* return the number of samples written */ 121 return 1; 122} 123 124/*-- counter read -----------------------------------------------------------*/ 125 126static int cnt_rinsn(struct comedi_device *dev, 127 struct comedi_subdevice *s, struct comedi_insn *insn, 128 unsigned int *data) 129{ 130 unsigned char a0, a1, a2, a3, a4; 131 int chan = CR_CHAN(insn->chanspec); 132 int result; 133 134 a0 = inb(dev->iobase + chan * 0x20); 135 a1 = inb(dev->iobase + chan * 0x20 + 0x04); 136 a2 = inb(dev->iobase + chan * 0x20 + 0x08); 137 a3 = inb(dev->iobase + chan * 0x20 + 0x0c); 138 a4 = inb(dev->iobase + chan * 0x20 + 0x10); 139 140 result = (a1 + (a2 * 256) + (a3 * 65536)); 141 if (a4 > 0) 142 result = result - s->maxdata; 143 144 *data = (unsigned int)result; 145 146 /* return the number of samples read */ 147 return 1; 148} 149 150/*-- attach -----------------------------------------------------------------*/ 151 152static int cnt_attach(struct comedi_device *dev, struct comedi_devconfig *it) 153{ 154 struct comedi_subdevice *subdevice; 155 struct pci_dev *pci_device; 156 struct cnt_board_struct *board; 157 unsigned long io_base; 158 int error, i; 159 160 /* allocate device private structure */ 161 error = alloc_private(dev, sizeof(struct cnt_device_private)); 162 if (error < 0) 163 return error; 164 165 /* Probe the device to determine what device in the series it is. */ 166 for (pci_device = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL); 167 pci_device != NULL; 168 pci_device = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_device)) { 169 if (pci_device->vendor == PCI_VENDOR_ID_KOLTER) { 170 for (i = 0; i < cnt_board_nbr; i++) { 171 if (cnt_boards[i].device_id == 172 pci_device->device) { 173 /* was a particular bus/slot requested? */ 174 if ((it->options[0] != 0) 175 || (it->options[1] != 0)) { 176 /* are we on the wrong bus/slot? */ 177 if (pci_device->bus->number != 178 it->options[0] 179 || 180 PCI_SLOT(pci_device->devfn) 181 != it->options[1]) { 182 continue; 183 } 184 } 185 186 dev->board_ptr = cnt_boards + i; 187 board = 188 (struct cnt_board_struct *) 189 dev->board_ptr; 190 goto found; 191 } 192 } 193 } 194 } 195 printk(KERN_WARNING 196 "comedi%d: no supported board found! (req. bus/slot: %d/%d)\n", 197 dev->minor, it->options[0], it->options[1]); 198 return -EIO; 199 200found: 201 printk(KERN_INFO 202 "comedi%d: found %s at PCI bus %d, slot %d\n", dev->minor, 203 board->name, pci_device->bus->number, 204 PCI_SLOT(pci_device->devfn)); 205 devpriv->pcidev = pci_device; 206 dev->board_name = board->name; 207 208 /* enable PCI device and request regions */ 209 error = comedi_pci_enable(pci_device, CNT_DRIVER_NAME); 210 if (error < 0) { 211 printk(KERN_WARNING "comedi%d: " 212 "failed to enable PCI device and request regions!\n", 213 dev->minor); 214 return error; 215 } 216 217 /* read register base address [PCI_BASE_ADDRESS #0] */ 218 io_base = pci_resource_start(pci_device, 0); 219 dev->iobase = io_base; 220 221 /* allocate the subdevice structures */ 222 error = alloc_subdevices(dev, 1); 223 if (error < 0) 224 return error; 225 226 subdevice = dev->subdevices + 0; 227 dev->read_subdev = subdevice; 228 229 subdevice->type = COMEDI_SUBD_COUNTER; 230 subdevice->subdev_flags = SDF_READABLE /* | SDF_COMMON */ ; 231 subdevice->n_chan = board->cnt_channel_nbr; 232 subdevice->maxdata = (1 << board->cnt_bits) - 1; 233 subdevice->insn_read = cnt_rinsn; 234 subdevice->insn_write = cnt_winsn; 235 236 /* select 20MHz clock */ 237 outb(3, dev->iobase + 248); 238 239 /* reset all counters */ 240 outb(0, dev->iobase); 241 outb(0, dev->iobase + 0x20); 242 outb(0, dev->iobase + 0x40); 243 244 printk(KERN_INFO "comedi%d: " CNT_DRIVER_NAME " attached.\n", 245 dev->minor); 246 return 0; 247} 248 249/*-- detach -----------------------------------------------------------------*/ 250 251static int cnt_detach(struct comedi_device *dev) 252{ 253 if (devpriv && devpriv->pcidev) { 254 if (dev->iobase) 255 comedi_pci_disable(devpriv->pcidev); 256 pci_dev_put(devpriv->pcidev); 257 } 258 printk(KERN_INFO "comedi%d: " CNT_DRIVER_NAME " remove\n", 259 dev->minor); 260 return 0; 261} 262 263MODULE_AUTHOR("Comedi http://www.comedi.org"); 264MODULE_DESCRIPTION("Comedi low-level driver"); 265MODULE_LICENSE("GPL"); 266