2 comedi/drivers/cb_pcidio.c
3 A Comedi driver for PCI-DIO24H & PCI-DIO48H of ComputerBoards (currently MeasurementComputing)
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 2000 David A. Schleef <ds@schleef.org>
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.
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.
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.
25 Description: ComputerBoards' DIO boards with PCI interface
26 Devices: [Measurement Computing] PCI-DIO24 (cb_pcidio), PCI-DIO24H, PCI-DIO48H
27 Author: Yoshiya Matsuzaka
28 Updated: Mon, 29 Oct 2007 15:40:47 +0000
31 This driver has been modified from skel.c of comedi-0.7.70.
33 Configuration Options:
34 [0] - PCI bus of device (optional)
35 [1] - PCI slot of device (optional)
36 If bus/slot is not specified, the first available PCI device will
39 Passing a zero for an option is the same as leaving it unspecified.
42 /*------------------------------ HEADER FILES ---------------------------------*/
43 #include "../comedidev.h"
44 #include "comedi_pci.h"
47 /*-------------------------- MACROS and DATATYPES -----------------------------*/
48 #define PCI_VENDOR_ID_CB 0x1307
51 * Board descriptions for two imaginary boards. Describing the
52 * boards in this way is optional, and completely driver-dependent.
53 * Some drivers use arrays such as this, other do not.
56 const char *name; /* anme of the board */
57 int n_8255; /* number of 8255 chips on board */
59 /* indices of base address regions */
60 int pcicontroler_badrindex;
61 int dioregs_badrindex;
64 static const struct pcidio_board pcidio_boards[] = {
68 pcicontroler_badrindex:1,
74 pcicontroler_badrindex:1,
80 pcicontroler_badrindex:0,
85 /* This is used by modprobe to translate PCI IDs to drivers. Should
86 * only be used for PCI and ISA-PnP devices */
87 /* Please add your PCI vendor ID to comedidev.h, and it will be forwarded
89 static DEFINE_PCI_DEVICE_TABLE(pcidio_pci_table) = {
90 {PCI_VENDOR_ID_CB, 0x0028, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
91 {PCI_VENDOR_ID_CB, 0x0014, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
92 {PCI_VENDOR_ID_CB, 0x000b, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
96 MODULE_DEVICE_TABLE(pci, pcidio_pci_table);
99 * Useful for shorthand access to the particular board structure
101 #define thisboard ((const struct pcidio_board *)dev->board_ptr)
103 /* this structure is for data unique to this hardware driver. If
104 several hardware drivers keep similar information in this structure,
105 feel free to suggest moving the variable to the struct comedi_device struct. */
106 struct pcidio_private {
107 int data; /* curently unused */
109 /* would be useful for a PCI device */
110 struct pci_dev *pci_dev;
112 /* used for DO readback, curently unused */
113 unsigned int do_readback[4]; /* up to 4 unsigned int suffice to hold 96 bits for PCI-DIO96 */
115 unsigned long dio_reg_base; /* address of port A of the first 8255 chip on board */
119 * most drivers define the following macro to make it easy to
120 * access the private structure.
122 #define devpriv ((struct pcidio_private *)dev->private)
125 * The struct comedi_driver structure tells the Comedi core module
126 * which functions to call to configure/deconfigure (attach/detach)
127 * the board, and also about the kernel module that contains
130 static int pcidio_attach(struct comedi_device *dev, struct comedi_devconfig *it);
131 static int pcidio_detach(struct comedi_device *dev);
132 static struct comedi_driver driver_cb_pcidio = {
133 driver_name:"cb_pcidio",
135 attach:pcidio_attach,
136 detach:pcidio_detach,
138 /* It is not necessary to implement the following members if you are
139 * writing a driver for a ISA PnP or PCI card */
141 /* Most drivers will support multiple types of boards by
142 * having an array of board structures. These were defined
143 * in pcidio_boards[] above. Note that the element 'name'
144 * was first in the structure -- Comedi uses this fact to
145 * extract the name of the board without knowing any details
146 * about the structure except for its length.
147 * When a device is attached (by comedi_config), the name
148 * of the device is given to Comedi, and Comedi tries to
149 * match it by going through the list of board names. If
150 * there is a match, the address of the pointer is put
151 * into dev->board_ptr and driver->attach() is called.
153 * Note that these are not necessary if you can determine
154 * the type of board in software. ISA PnP, PCI, and PCMCIA
155 * devices are such boards.
158 /* The following fields should NOT be initialized if you are dealing
161 * board_name: pcidio_boards,
162 * offset: sizeof(struct pcidio_board),
163 * num_names: sizeof(pcidio_boards) / sizeof(structpcidio_board),
168 /*------------------------------- FUNCTIONS -----------------------------------*/
171 * Attach is called by the Comedi core to configure the driver
172 * for a particular board. If you specified a board_name array
173 * in the driver structure, dev->board_ptr contains that
176 static int pcidio_attach(struct comedi_device *dev, struct comedi_devconfig *it)
178 struct pci_dev *pcidev = NULL;
182 printk("comedi%d: cb_pcidio: \n", dev->minor);
185 * Allocate the private structure area. alloc_private() is a
186 * convenient macro defined in comedidev.h.
188 if (alloc_private(dev, sizeof(struct pcidio_private)) < 0)
191 * If you can probe the device to determine what device in a series
192 * it is, this is the place to do it. Otherwise, dev->board_ptr
193 * should already be initialized.
196 * Probe the device to determine what device in the series it is.
199 for (pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
201 pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pcidev)) {
202 /* is it not a computer boards card? */
203 if (pcidev->vendor != PCI_VENDOR_ID_CB)
205 /* loop through cards supported by this driver */
207 index < sizeof pcidio_boards / sizeof(struct pcidio_board);
209 if (pcidio_pci_table[index].device != pcidev->device)
212 /* was a particular bus/slot requested? */
213 if (it->options[0] || it->options[1]) {
214 /* are we on the wrong bus/slot? */
215 if (pcidev->bus->number != it->options[0] ||
216 PCI_SLOT(pcidev->devfn) !=
221 dev->board_ptr = pcidio_boards + index;
226 printk("No supported ComputerBoards/MeasurementComputing card found on "
227 "requested position\n");
233 * Initialize dev->board_name. Note that we can use the "thisboard"
234 * macro now, since we just initialized it in the last line.
236 dev->board_name = thisboard->name;
238 devpriv->pci_dev = pcidev;
239 printk("Found %s on bus %i, slot %i\n", thisboard->name,
240 devpriv->pci_dev->bus->number,
241 PCI_SLOT(devpriv->pci_dev->devfn));
242 if (comedi_pci_enable(pcidev, thisboard->name)) {
243 printk("cb_pcidio: failed to enable PCI device and request regions\n");
246 devpriv->dio_reg_base
248 pci_resource_start(devpriv->pci_dev,
249 pcidio_boards[index].dioregs_badrindex);
252 * Allocate the subdevice structures. alloc_subdevice() is a
253 * convenient macro defined in comedidev.h.
255 if (alloc_subdevices(dev, thisboard->n_8255) < 0)
258 for (i = 0; i < thisboard->n_8255; i++) {
259 subdev_8255_init(dev, dev->subdevices + i,
260 NULL, devpriv->dio_reg_base + i * 4);
261 printk(" subdev %d: base = 0x%lx\n", i,
262 devpriv->dio_reg_base + i * 4);
265 printk("attached\n");
270 * _detach is called to deconfigure a device. It should deallocate
272 * This function is also called when _attach() fails, so it should be
273 * careful not to release resources that were not necessarily
274 * allocated by _attach(). dev->private and dev->subdevices are
275 * deallocated automatically by the core.
277 static int pcidio_detach(struct comedi_device *dev)
279 printk("comedi%d: cb_pcidio: remove\n", dev->minor);
281 if (devpriv->pci_dev) {
282 if (devpriv->dio_reg_base) {
283 comedi_pci_disable(devpriv->pci_dev);
285 pci_dev_put(devpriv->pci_dev);
288 if (dev->subdevices) {
290 for (i = 0; i < thisboard->n_8255; i++) {
291 subdev_8255_cleanup(dev, dev->subdevices + i);
298 * A convenient macro that defines init_module() and cleanup_module(),
301 COMEDI_PCI_INITCLEANUP(driver_cb_pcidio, pcidio_pci_table);