/* comedi/drivers/ke_counter.c Comedi driver for Kolter-Electronic PCI Counter 1 Card COMEDI - Linux Control and Measurement Device Interface Copyright (C) 2000 David A. Schleef This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Driver: ke_counter Description: Driver for Kolter Electronic Counter Card Devices: [Kolter Electronic] PCI Counter Card (ke_counter) Author: Michael Hillmann Updated: Mon, 14 Apr 2008 15:42:42 +0100 Status: tested Configuration Options: [0] - PCI bus of device (optional) [1] - PCI slot of device (optional) If bus/slot is not specified, the first supported PCI device found will be used. This driver is a simple driver to read the counter values from Kolter Electronic PCI Counter Card. */ #include "../comedidev.h" #include "comedi_pci.h" #define CNT_DRIVER_NAME "ke_counter" #define PCI_VENDOR_ID_KOLTER 0x1001 #define CNT_CARD_DEVICE_ID 0x0014 /*-- function prototypes ----------------------------------------------------*/ static int cnt_attach(struct comedi_device *dev, struct comedi_devconfig *it); static int cnt_detach(struct comedi_device *dev); static DEFINE_PCI_DEVICE_TABLE(cnt_pci_table) = { { PCI_VENDOR_ID_KOLTER, CNT_CARD_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, { 0} }; MODULE_DEVICE_TABLE(pci, cnt_pci_table); /*-- board specification structure ------------------------------------------*/ struct cnt_board_struct { const char *name; int device_id; int cnt_channel_nbr; int cnt_bits; }; static const struct cnt_board_struct cnt_boards[] = { { .name = CNT_DRIVER_NAME, .device_id = CNT_CARD_DEVICE_ID, .cnt_channel_nbr = 3, .cnt_bits = 24} }; #define cnt_board_nbr (sizeof(cnt_boards)/sizeof(struct cnt_board_struct)) /*-- device private structure -----------------------------------------------*/ struct cnt_device_private { struct pci_dev *pcidev; }; #define devpriv ((struct cnt_device_private *)dev->private) static struct comedi_driver cnt_driver = { .driver_name = CNT_DRIVER_NAME, .module = THIS_MODULE, .attach = cnt_attach, .detach = cnt_detach, }; COMEDI_PCI_INITCLEANUP(cnt_driver, cnt_pci_table); /*-- counter write ----------------------------------------------------------*/ /* This should be used only for resetting the counters; maybe it is better to make a special command 'reset'. */ static int cnt_winsn(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { int chan = CR_CHAN(insn->chanspec); outb((unsigned char)((data[0] >> 24) & 0xff), dev->iobase + chan * 0x20 + 0x10); outb((unsigned char)((data[0] >> 16) & 0xff), dev->iobase + chan * 0x20 + 0x0c); outb((unsigned char)((data[0] >> 8) & 0xff), dev->iobase + chan * 0x20 + 0x08); outb((unsigned char)((data[0] >> 0) & 0xff), dev->iobase + chan * 0x20 + 0x04); /* return the number of samples written */ return 1; } /*-- counter read -----------------------------------------------------------*/ static int cnt_rinsn(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_insn *insn, unsigned int *data) { unsigned char a0, a1, a2, a3, a4; int chan = CR_CHAN(insn->chanspec); int result; a0 = inb(dev->iobase + chan * 0x20); a1 = inb(dev->iobase + chan * 0x20 + 0x04); a2 = inb(dev->iobase + chan * 0x20 + 0x08); a3 = inb(dev->iobase + chan * 0x20 + 0x0c); a4 = inb(dev->iobase + chan * 0x20 + 0x10); result = (a1 + (a2 * 256) + (a3 * 65536)); if (a4 > 0) result = result - s->maxdata; *data = (unsigned int)result; /* return the number of samples read */ return 1; } /*-- attach -----------------------------------------------------------------*/ static int cnt_attach(struct comedi_device *dev, struct comedi_devconfig *it) { struct comedi_subdevice *subdevice; struct pci_dev *pci_device; struct cnt_board_struct *board; unsigned long io_base; int error, i; /* allocate device private structure */ error = alloc_private(dev, sizeof(struct cnt_device_private)); if (error < 0) return error; /* Probe the device to determine what device in the series it is. */ for (pci_device = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL); pci_device != NULL; pci_device = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_device)) { if (pci_device->vendor == PCI_VENDOR_ID_KOLTER) { for (i = 0; i < cnt_board_nbr; i++) { if (cnt_boards[i].device_id == pci_device->device) { /* was a particular bus/slot requested? */ if ((it->options[0] != 0) || (it->options[1] != 0)) { /* are we on the wrong bus/slot? */ if (pci_device->bus->number != it->options[0] || PCI_SLOT(pci_device->devfn) != it->options[1]) { continue; } } dev->board_ptr = cnt_boards + i; board = (struct cnt_board_struct *) dev->board_ptr; goto found; } } } } printk("comedi%d: no supported board found! (req. bus/slot: %d/%d)\n", dev->minor, it->options[0], it->options[1]); return -EIO; found: printk("comedi%d: found %s at PCI bus %d, slot %d\n", dev->minor, board->name, pci_device->bus->number, PCI_SLOT(pci_device->devfn)); devpriv->pcidev = pci_device; dev->board_name = board->name; /* enable PCI device and request regions */ error = comedi_pci_enable(pci_device, CNT_DRIVER_NAME); if (error < 0) { printk ("comedi%d: failed to enable PCI device and request regions!\n", dev->minor); return error; } /* read register base address [PCI_BASE_ADDRESS #0] */ io_base = pci_resource_start(pci_device, 0); dev->iobase = io_base; /* allocate the subdevice structures */ error = alloc_subdevices(dev, 1); if (error < 0) return error; subdevice = dev->subdevices + 0; dev->read_subdev = subdevice; subdevice->type = COMEDI_SUBD_COUNTER; subdevice->subdev_flags = SDF_READABLE /* | SDF_COMMON */ ; subdevice->n_chan = board->cnt_channel_nbr; subdevice->maxdata = (1 << board->cnt_bits) - 1; subdevice->insn_read = cnt_rinsn; subdevice->insn_write = cnt_winsn; /* select 20MHz clock */ outb(3, dev->iobase + 248); /* reset all counters */ outb(0, dev->iobase); outb(0, dev->iobase + 0x20); outb(0, dev->iobase + 0x40); printk("comedi%d: " CNT_DRIVER_NAME " attached.\n", dev->minor); return 0; } /*-- detach -----------------------------------------------------------------*/ static int cnt_detach(struct comedi_device *dev) { if (devpriv && devpriv->pcidev) { if (dev->iobase) { comedi_pci_disable(devpriv->pcidev); } pci_dev_put(devpriv->pcidev); } printk("comedi%d: " CNT_DRIVER_NAME " remove\n", dev->minor); return 0; }