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_DEVICE(PCI_VENDOR_ID_KOLTER, CNT_CARD_DEVICE_ID) }, 56 {0} 57}; 58 59MODULE_DEVICE_TABLE(pci, cnt_pci_table); 60 61/*-- board specification structure ------------------------------------------*/ 62 63struct cnt_board_struct { 64 65 const char *name; 66 int device_id; 67 int cnt_channel_nbr; 68 int cnt_bits; 69}; 70 71static const struct 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(struct cnt_board_struct)) 80 81/*-- device private structure -----------------------------------------------*/ 82 83struct cnt_device_private { 84 85 struct pci_dev *pcidev; 86}; 87 88#define devpriv ((struct cnt_device_private *)dev->private) 89 90static struct comedi_driver cnt_driver = { 91 .driver_name = CNT_DRIVER_NAME, 92 .module = THIS_MODULE, 93 .attach = cnt_attach, 94 .detach = cnt_detach, 95}; 96 97static int __devinit cnt_driver_pci_probe(struct pci_dev *dev, 98 const struct pci_device_id *ent) 99{ 100 return comedi_pci_auto_config(dev, cnt_driver.driver_name); 101} 102 103static void __devexit cnt_driver_pci_remove(struct pci_dev *dev) 104{ 105 comedi_pci_auto_unconfig(dev); 106} 107 108static struct pci_driver cnt_driver_pci_driver = { 109 .id_table = cnt_pci_table, 110 .probe = &cnt_driver_pci_probe, 111 .remove = __devexit_p(&cnt_driver_pci_remove) 112}; 113 114static int __init cnt_driver_init_module(void) 115{ 116 int retval; 117 118 retval = comedi_driver_register(&cnt_driver); 119 if (retval < 0) 120 return retval; 121 122 cnt_driver_pci_driver.name = (char *)cnt_driver.driver_name; 123 return pci_register_driver(&cnt_driver_pci_driver); 124} 125 126static void __exit cnt_driver_cleanup_module(void) 127{ 128 pci_unregister_driver(&cnt_driver_pci_driver); 129 comedi_driver_unregister(&cnt_driver); 130} 131 132module_init(cnt_driver_init_module); 133module_exit(cnt_driver_cleanup_module); 134 135/*-- counter write ----------------------------------------------------------*/ 136 137/* This should be used only for resetting the counters; maybe it is better 138 to make a special command 'reset'. */ 139static int cnt_winsn(struct comedi_device *dev, 140 struct comedi_subdevice *s, struct comedi_insn *insn, 141 unsigned int *data) 142{ 143 int chan = CR_CHAN(insn->chanspec); 144 145 outb((unsigned char)((data[0] >> 24) & 0xff), 146 dev->iobase + chan * 0x20 + 0x10); 147 outb((unsigned char)((data[0] >> 16) & 0xff), 148 dev->iobase + chan * 0x20 + 0x0c); 149 outb((unsigned char)((data[0] >> 8) & 0xff), 150 dev->iobase + chan * 0x20 + 0x08); 151 outb((unsigned char)((data[0] >> 0) & 0xff), 152 dev->iobase + chan * 0x20 + 0x04); 153 154 /* return the number of samples written */ 155 return 1; 156} 157 158/*-- counter read -----------------------------------------------------------*/ 159 160static int cnt_rinsn(struct comedi_device *dev, 161 struct comedi_subdevice *s, struct comedi_insn *insn, 162 unsigned int *data) 163{ 164 unsigned char a0, a1, a2, a3, a4; 165 int chan = CR_CHAN(insn->chanspec); 166 int result; 167 168 a0 = inb(dev->iobase + chan * 0x20); 169 a1 = inb(dev->iobase + chan * 0x20 + 0x04); 170 a2 = inb(dev->iobase + chan * 0x20 + 0x08); 171 a3 = inb(dev->iobase + chan * 0x20 + 0x0c); 172 a4 = inb(dev->iobase + chan * 0x20 + 0x10); 173 174 result = (a1 + (a2 * 256) + (a3 * 65536)); 175 if (a4 > 0) 176 result = result - s->maxdata; 177 178 *data = (unsigned int)result; 179 180 /* return the number of samples read */ 181 return 1; 182} 183 184/*-- attach -----------------------------------------------------------------*/ 185 186static int cnt_attach(struct comedi_device *dev, struct comedi_devconfig *it) 187{ 188 struct comedi_subdevice *subdevice; 189 struct pci_dev *pci_device = NULL; 190 struct cnt_board_struct *board; 191 unsigned long io_base; 192 int error, i; 193 194 /* allocate device private structure */ 195 error = alloc_private(dev, sizeof(struct cnt_device_private)); 196 if (error < 0) 197 return error; 198 199 /* Probe the device to determine what device in the series it is. */ 200 for_each_pci_dev(pci_device) { 201 if (pci_device->vendor == PCI_VENDOR_ID_KOLTER) { 202 for (i = 0; i < cnt_board_nbr; i++) { 203 if (cnt_boards[i].device_id == 204 pci_device->device) { 205 /* was a particular bus/slot requested? */ 206 if ((it->options[0] != 0) 207 || (it->options[1] != 0)) { 208 /* are we on the wrong bus/slot? */ 209 if (pci_device->bus->number != 210 it->options[0] 211 || 212 PCI_SLOT(pci_device->devfn) 213 != it->options[1]) { 214 continue; 215 } 216 } 217 218 dev->board_ptr = cnt_boards + i; 219 board = 220 (struct cnt_board_struct *) 221 dev->board_ptr; 222 goto found; 223 } 224 } 225 } 226 } 227 printk(KERN_WARNING 228 "comedi%d: no supported board found! (req. bus/slot: %d/%d)\n", 229 dev->minor, it->options[0], it->options[1]); 230 return -EIO; 231 232found: 233 printk(KERN_INFO 234 "comedi%d: found %s at PCI bus %d, slot %d\n", dev->minor, 235 board->name, pci_device->bus->number, 236 PCI_SLOT(pci_device->devfn)); 237 devpriv->pcidev = pci_device; 238 dev->board_name = board->name; 239 240 /* enable PCI device and request regions */ 241 error = comedi_pci_enable(pci_device, CNT_DRIVER_NAME); 242 if (error < 0) { 243 printk(KERN_WARNING "comedi%d: " 244 "failed to enable PCI device and request regions!\n", 245 dev->minor); 246 return error; 247 } 248 249 /* read register base address [PCI_BASE_ADDRESS #0] */ 250 io_base = pci_resource_start(pci_device, 0); 251 dev->iobase = io_base; 252 253 /* allocate the subdevice structures */ 254 error = alloc_subdevices(dev, 1); 255 if (error < 0) 256 return error; 257 258 subdevice = dev->subdevices + 0; 259 dev->read_subdev = subdevice; 260 261 subdevice->type = COMEDI_SUBD_COUNTER; 262 subdevice->subdev_flags = SDF_READABLE /* | SDF_COMMON */ ; 263 subdevice->n_chan = board->cnt_channel_nbr; 264 subdevice->maxdata = (1 << board->cnt_bits) - 1; 265 subdevice->insn_read = cnt_rinsn; 266 subdevice->insn_write = cnt_winsn; 267 268 /* select 20MHz clock */ 269 outb(3, dev->iobase + 248); 270 271 /* reset all counters */ 272 outb(0, dev->iobase); 273 outb(0, dev->iobase + 0x20); 274 outb(0, dev->iobase + 0x40); 275 276 printk(KERN_INFO "comedi%d: " CNT_DRIVER_NAME " attached.\n", 277 dev->minor); 278 return 0; 279} 280 281/*-- detach -----------------------------------------------------------------*/ 282 283static int cnt_detach(struct comedi_device *dev) 284{ 285 if (devpriv && devpriv->pcidev) { 286 if (dev->iobase) 287 comedi_pci_disable(devpriv->pcidev); 288 pci_dev_put(devpriv->pcidev); 289 } 290 printk(KERN_INFO "comedi%d: " CNT_DRIVER_NAME " remove\n", 291 dev->minor); 292 return 0; 293} 294 295MODULE_AUTHOR("Comedi http://www.comedi.org"); 296MODULE_DESCRIPTION("Comedi low-level driver"); 297MODULE_LICENSE("GPL"); 298