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
; /* name of the board */
58 int n_8255
; /* number of 8255 chips on board */
60 /* indices of base address regions */
61 int pcicontroler_badrindex
;
62 int dioregs_badrindex
;
65 static const struct pcidio_board pcidio_boards
[] = {
70 .pcicontroler_badrindex
= 1,
71 .dioregs_badrindex
= 2,
77 .pcicontroler_badrindex
= 1,
78 .dioregs_badrindex
= 2,
84 .pcicontroler_badrindex
= 0,
85 .dioregs_badrindex
= 1,
89 /* This is used by modprobe to translate PCI IDs to drivers. Should
90 * only be used for PCI and ISA-PnP devices */
91 /* Please add your PCI vendor ID to comedidev.h, and it will be forwarded
93 static DEFINE_PCI_DEVICE_TABLE(pcidio_pci_table
) = {
95 PCI_VENDOR_ID_CB
, 0x0028, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0}, {
96 PCI_VENDOR_ID_CB
, 0x0014, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0}, {
97 PCI_VENDOR_ID_CB
, 0x000b, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0}, {
101 MODULE_DEVICE_TABLE(pci
, pcidio_pci_table
);
104 * Useful for shorthand access to the particular board structure
106 #define thisboard ((const struct pcidio_board *)dev->board_ptr)
108 /* this structure is for data unique to this hardware driver. If
109 several hardware drivers keep similar information in this structure,
110 feel free to suggest moving the variable to the struct comedi_device struct. */
111 struct pcidio_private
{
112 int data
; /* currently unused */
114 /* would be useful for a PCI device */
115 struct pci_dev
*pci_dev
;
117 /* used for DO readback, currently unused */
118 unsigned int do_readback
[4]; /* up to 4 unsigned int suffice to hold 96 bits for PCI-DIO96 */
120 unsigned long dio_reg_base
; /* address of port A of the first 8255 chip on board */
124 * most drivers define the following macro to make it easy to
125 * access the private structure.
127 #define devpriv ((struct pcidio_private *)dev->private)
130 * The struct comedi_driver structure tells the Comedi core module
131 * which functions to call to configure/deconfigure (attach/detach)
132 * the board, and also about the kernel module that contains
135 static int pcidio_attach(struct comedi_device
*dev
,
136 struct comedi_devconfig
*it
);
137 static int pcidio_detach(struct comedi_device
*dev
);
138 static struct comedi_driver driver_cb_pcidio
= {
139 .driver_name
= "cb_pcidio",
140 .module
= THIS_MODULE
,
141 .attach
= pcidio_attach
,
142 .detach
= pcidio_detach
,
144 /* It is not necessary to implement the following members if you are
145 * writing a driver for a ISA PnP or PCI card */
147 /* Most drivers will support multiple types of boards by
148 * having an array of board structures. These were defined
149 * in pcidio_boards[] above. Note that the element 'name'
150 * was first in the structure -- Comedi uses this fact to
151 * extract the name of the board without knowing any details
152 * about the structure except for its length.
153 * When a device is attached (by comedi_config), the name
154 * of the device is given to Comedi, and Comedi tries to
155 * match it by going through the list of board names. If
156 * there is a match, the address of the pointer is put
157 * into dev->board_ptr and driver->attach() is called.
159 * Note that these are not necessary if you can determine
160 * the type of board in software. ISA PnP, PCI, and PCMCIA
161 * devices are such boards.
164 /* The following fields should NOT be initialized if you are dealing
167 * .board_name = pcidio_boards,
168 * .offset = sizeof(struct pcidio_board),
169 * .num_names = sizeof(pcidio_boards) / sizeof(structpcidio_board),
174 /*------------------------------- FUNCTIONS -----------------------------------*/
177 * Attach is called by the Comedi core to configure the driver
178 * for a particular board. If you specified a board_name array
179 * in the driver structure, dev->board_ptr contains that
182 static int pcidio_attach(struct comedi_device
*dev
, struct comedi_devconfig
*it
)
184 struct pci_dev
*pcidev
= NULL
;
188 printk("comedi%d: cb_pcidio: \n", dev
->minor
);
191 * Allocate the private structure area. alloc_private() is a
192 * convenient macro defined in comedidev.h.
194 if (alloc_private(dev
, sizeof(struct pcidio_private
)) < 0)
197 * If you can probe the device to determine what device in a series
198 * it is, this is the place to do it. Otherwise, dev->board_ptr
199 * should already be initialized.
202 * Probe the device to determine what device in the series it is.
205 for (pcidev
= pci_get_device(PCI_ANY_ID
, PCI_ANY_ID
, NULL
);
207 pcidev
= pci_get_device(PCI_ANY_ID
, PCI_ANY_ID
, pcidev
)) {
208 /* is it not a computer boards card? */
209 if (pcidev
->vendor
!= PCI_VENDOR_ID_CB
)
211 /* loop through cards supported by this driver */
212 for (index
= 0; index
< ARRAY_SIZE(pcidio_boards
); index
++) {
213 if (pcidio_boards
[index
].dev_id
!= pcidev
->device
)
216 /* was a particular bus/slot requested? */
217 if (it
->options
[0] || it
->options
[1]) {
218 /* are we on the wrong bus/slot? */
219 if (pcidev
->bus
->number
!= it
->options
[0] ||
220 PCI_SLOT(pcidev
->devfn
) != it
->options
[1]) {
224 dev
->board_ptr
= pcidio_boards
+ index
;
229 printk("No supported ComputerBoards/MeasurementComputing card found on "
230 "requested position\n");
236 * Initialize dev->board_name. Note that we can use the "thisboard"
237 * macro now, since we just initialized it in the last line.
239 dev
->board_name
= thisboard
->name
;
241 devpriv
->pci_dev
= pcidev
;
242 printk("Found %s on bus %i, slot %i\n", thisboard
->name
,
243 devpriv
->pci_dev
->bus
->number
,
244 PCI_SLOT(devpriv
->pci_dev
->devfn
));
245 if (comedi_pci_enable(pcidev
, thisboard
->name
)) {
247 ("cb_pcidio: failed to enable PCI device and request regions\n");
250 devpriv
->dio_reg_base
252 pci_resource_start(devpriv
->pci_dev
,
253 pcidio_boards
[index
].dioregs_badrindex
);
256 * Allocate the subdevice structures. alloc_subdevice() is a
257 * convenient macro defined in comedidev.h.
259 if (alloc_subdevices(dev
, thisboard
->n_8255
) < 0)
262 for (i
= 0; i
< thisboard
->n_8255
; i
++) {
263 subdev_8255_init(dev
, dev
->subdevices
+ i
,
264 NULL
, devpriv
->dio_reg_base
+ i
* 4);
265 printk(" subdev %d: base = 0x%lx\n", i
,
266 devpriv
->dio_reg_base
+ i
* 4);
269 printk("attached\n");
274 * _detach is called to deconfigure a device. It should deallocate
276 * This function is also called when _attach() fails, so it should be
277 * careful not to release resources that were not necessarily
278 * allocated by _attach(). dev->private and dev->subdevices are
279 * deallocated automatically by the core.
281 static int pcidio_detach(struct comedi_device
*dev
)
283 printk("comedi%d: cb_pcidio: remove\n", dev
->minor
);
285 if (devpriv
->pci_dev
) {
286 if (devpriv
->dio_reg_base
)
287 comedi_pci_disable(devpriv
->pci_dev
);
288 pci_dev_put(devpriv
->pci_dev
);
291 if (dev
->subdevices
) {
293 for (i
= 0; i
< thisboard
->n_8255
; i
++)
294 subdev_8255_cleanup(dev
, dev
->subdevices
+ i
);
300 * A convenient macro that defines init_module() and cleanup_module(),
303 COMEDI_PCI_INITCLEANUP(driver_cb_pcidio
, pcidio_pci_table
);