2 comedi/drivers/amplc_pc263.c
3 Driver for Amplicon PC263 and PCI263 relay boards.
5 Copyright (C) 2002 MEV Ltd. <http://www.mev.co.uk/>
7 COMEDI - Linux Control and Measurement Device Interface
8 Copyright (C) 2000 David A. Schleef <ds@schleef.org>
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 Description: Amplicon PC263, PCI263
28 Author: Ian Abbott <abbotti@mev.co.uk>
29 Devices: [Amplicon] PC263 (pc263), PCI263 (pci263 or amplc_pc263)
30 Updated: Wed, 22 Oct 2008 14:10:53 +0100
33 Configuration options - PC263:
34 [0] - I/O port base address
36 Configuration options - PCI263:
37 [0] - PCI bus of device (optional)
38 [1] - PCI slot of device (optional)
39 If bus/slot is not specified, the first available PCI device will be
42 Each board appears as one subdevice, with 16 digital outputs, each
43 connected to a reed-relay. Relay contacts are closed when output is 1.
44 The state of the outputs can be read.
47 #include "../comedidev.h"
49 #define PC263_DRIVER_NAME "amplc_pc263"
51 #define DO_ISA IS_ENABLED(CONFIG_COMEDI_AMPLC_PC263_ISA)
52 #define DO_PCI IS_ENABLED(CONFIG_COMEDI_AMPLC_PC263_PCI)
54 /* PCI263 PCI configuration register information */
55 #define PCI_DEVICE_ID_AMPLICON_PCI263 0x000c
56 #define PCI_DEVICE_ID_INVALID 0xffff
58 /* PC263 / PCI263 registers */
59 #define PC263_IO_SIZE 2
62 * Board descriptions for Amplicon PC263 / PCI263.
65 enum pc263_bustype { isa_bustype, pci_bustype };
66 enum pc263_model { pc263_model, pci263_model, anypci_model };
71 enum pc263_bustype bustype;
72 enum pc263_model model;
74 static const struct pc263_board pc263_boards[] = {
78 .bustype = isa_bustype,
85 .devid = PCI_DEVICE_ID_AMPLICON_PCI263,
86 .bustype = pci_bustype,
87 .model = pci263_model,
90 .name = PC263_DRIVER_NAME,
91 .devid = PCI_DEVICE_ID_INVALID,
92 .bustype = pci_bustype,
93 .model = anypci_model, /* wildcard */
98 /* test if ISA supported and this is an ISA board */
99 static inline bool is_isa_board(const struct pc263_board *board)
101 return DO_ISA && board->bustype == isa_bustype;
104 /* test if PCI supported and this is a PCI board */
105 static inline bool is_pci_board(const struct pc263_board *board)
107 return DO_PCI && board->bustype == pci_bustype;
111 * This function looks for a board matching the supplied PCI device.
113 static const struct pc263_board *pc263_find_pci_board(struct pci_dev *pci_dev)
117 for (i = 0; i < ARRAY_SIZE(pc263_boards); i++)
118 if (is_pci_board(&pc263_boards[i]) &&
119 pci_dev->device == pc263_boards[i].devid)
120 return &pc263_boards[i];
126 * This function looks for a PCI device matching the requested board name,
129 static struct pci_dev *pc263_find_pci_dev(struct comedi_device *dev,
130 struct comedi_devconfig *it)
132 const struct pc263_board *thisboard = comedi_board(dev);
133 struct pci_dev *pci_dev = NULL;
134 int bus = it->options[0];
135 int slot = it->options[1];
137 for_each_pci_dev(pci_dev) {
139 if (bus != pci_dev->bus->number ||
140 slot != PCI_SLOT(pci_dev->devfn))
143 if (pci_dev->vendor != PCI_VENDOR_ID_AMPLICON)
146 if (thisboard->model == anypci_model) {
147 /* Wildcard board matches any supported PCI board. */
148 const struct pc263_board *foundboard;
150 foundboard = pc263_find_pci_board(pci_dev);
151 if (foundboard == NULL)
153 /* Replace wildcard board_ptr. */
154 dev->board_ptr = thisboard = foundboard;
156 /* Match specific model name. */
157 if (pci_dev->device != thisboard->devid)
162 dev_err(dev->class_dev,
163 "No supported board found! (req. bus %d, slot %d)\n",
168 * This function checks and requests an I/O region, reporting an error
169 * if there is a conflict.
171 static int pc263_request_region(struct comedi_device *dev, unsigned long from,
172 unsigned long extent)
174 if (!from || !request_region(from, extent, PC263_DRIVER_NAME)) {
175 dev_err(dev->class_dev, "I/O port conflict (%#lx,%lu)!\n",
182 static int pc263_do_insn_bits(struct comedi_device *dev,
183 struct comedi_subdevice *s,
184 struct comedi_insn *insn, unsigned int *data)
186 /* The insn data is a mask in data[0] and the new data
187 * in data[1], each channel cooresponding to a bit. */
189 s->state &= ~data[0];
190 s->state |= data[0] & data[1];
191 /* Write out the new digital output lines */
192 outb(s->state & 0xFF, dev->iobase);
193 outb(s->state >> 8, dev->iobase + 1);
198 static void pc263_report_attach(struct comedi_device *dev)
200 const struct pc263_board *thisboard = comedi_board(dev);
201 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
204 if (is_isa_board(thisboard))
205 snprintf(tmpbuf, sizeof(tmpbuf), "(base %#lx) ", dev->iobase);
206 else if (is_pci_board(thisboard))
207 snprintf(tmpbuf, sizeof(tmpbuf), "(pci %s) ",
211 dev_info(dev->class_dev, "%s %sattached\n", dev->board_name, tmpbuf);
214 static int pc263_common_attach(struct comedi_device *dev, unsigned long iobase)
216 const struct pc263_board *thisboard = comedi_board(dev);
217 struct comedi_subdevice *s;
220 dev->board_name = thisboard->name;
221 dev->iobase = iobase;
223 ret = comedi_alloc_subdevices(dev, 1);
227 s = &dev->subdevices[0];
228 /* digital output subdevice */
229 s->type = COMEDI_SUBD_DO;
230 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
233 s->range_table = &range_digital;
234 s->insn_bits = pc263_do_insn_bits;
235 /* read initial relay state */
236 s->state = inb(dev->iobase) | (inb(dev->iobase + 1) << 8);
238 pc263_report_attach(dev);
242 static int pc263_pci_common_attach(struct comedi_device *dev,
243 struct pci_dev *pci_dev)
245 unsigned long iobase;
248 comedi_set_hw_dev(dev, &pci_dev->dev);
250 ret = comedi_pci_enable(pci_dev, PC263_DRIVER_NAME);
252 dev_err(dev->class_dev,
253 "error! cannot enable PCI device and request regions!\n");
256 iobase = pci_resource_start(pci_dev, 2);
257 return pc263_common_attach(dev, iobase);
261 * Attach is called by the Comedi core to configure the driver
262 * for a particular board. If you specified a board_name array
263 * in the driver structure, dev->board_ptr contains that
266 static int pc263_attach(struct comedi_device *dev, struct comedi_devconfig *it)
268 const struct pc263_board *thisboard = comedi_board(dev);
271 dev_info(dev->class_dev, PC263_DRIVER_NAME ": attach\n");
273 /* Process options and reserve resources according to bus type. */
274 if (is_isa_board(thisboard)) {
275 unsigned long iobase = it->options[0];
276 ret = pc263_request_region(dev, iobase, PC263_IO_SIZE);
279 return pc263_common_attach(dev, iobase);
280 } else if (is_pci_board(thisboard)) {
281 struct pci_dev *pci_dev;
283 pci_dev = pc263_find_pci_dev(dev, it);
286 return pc263_pci_common_attach(dev, pci_dev);
288 dev_err(dev->class_dev, PC263_DRIVER_NAME
289 ": BUG! cannot determine board type!\n");
294 * The attach_pci hook (if non-NULL) is called at PCI probe time in preference
295 * to the "manual" attach hook. dev->board_ptr is NULL on entry. There should
296 * be a board entry matching the supplied PCI device.
298 static int __devinit pc263_attach_pci(struct comedi_device *dev,
299 struct pci_dev *pci_dev)
304 dev_info(dev->class_dev, PC263_DRIVER_NAME ": attach pci %s\n",
306 dev->board_ptr = pc263_find_pci_board(pci_dev);
307 if (dev->board_ptr == NULL) {
308 dev_err(dev->class_dev, "BUG! cannot determine board type!\n");
312 * Need to 'get' the PCI device to match the 'put' in pc263_detach().
313 * TODO: Remove the pci_dev_get() and matching pci_dev_put() once
314 * support for manual attachment of PCI devices via pc263_attach()
317 pci_dev_get(pci_dev);
318 return pc263_pci_common_attach(dev, pci_dev);
321 static void pc263_detach(struct comedi_device *dev)
323 const struct pc263_board *thisboard = comedi_board(dev);
325 if (is_isa_board(thisboard)) {
327 release_region(dev->iobase, PC263_IO_SIZE);
328 } else if (is_pci_board(thisboard)) {
329 struct pci_dev *pcidev = comedi_to_pci_dev(dev);
332 comedi_pci_disable(pcidev);
339 * The struct comedi_driver structure tells the Comedi core module
340 * which functions to call to configure/deconfigure (attach/detach)
341 * the board, and also about the kernel module that contains
344 static struct comedi_driver amplc_pc263_driver = {
345 .driver_name = PC263_DRIVER_NAME,
346 .module = THIS_MODULE,
347 .attach = pc263_attach,
348 .attach_pci = pc263_attach_pci,
349 .detach = pc263_detach,
350 .board_name = &pc263_boards[0].name,
351 .offset = sizeof(struct pc263_board),
352 .num_names = ARRAY_SIZE(pc263_boards),
356 static DEFINE_PCI_DEVICE_TABLE(pc263_pci_table) = {
357 { PCI_DEVICE(PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI263) },
360 MODULE_DEVICE_TABLE(pci, pc263_pci_table);
362 static int __devinit amplc_pc263_pci_probe(struct pci_dev *dev,
363 const struct pci_device_id
366 return comedi_pci_auto_config(dev, &lc_pc263_driver);
369 static void __devexit amplc_pc263_pci_remove(struct pci_dev *dev)
371 comedi_pci_auto_unconfig(dev);
374 static struct pci_driver amplc_pc263_pci_driver = {
375 .name = PC263_DRIVER_NAME,
376 .id_table = pc263_pci_table,
377 .probe = &lc_pc263_pci_probe,
378 .remove = __devexit_p(&lc_pc263_pci_remove)
380 module_comedi_pci_driver(amplc_pc263_driver, amplc_pc263_pci_driver);
382 module_comedi_driver(amplc_pc263_driver);
385 MODULE_AUTHOR("Comedi http://www.comedi.org");
386 MODULE_DESCRIPTION("Comedi low-level driver");
387 MODULE_LICENSE("GPL");