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Staging: comedi: fix sched.h build breakage
[linux-2.6/mini2440.git] / drivers / staging / comedi / drivers / unioxx5.c
blob75a9a62e1a7040f8d07afb570b547ee841401434
1 /***************************************************************************
2 * *
3 * comedi/drivers/unioxx5.c *
4 * Driver for Fastwel UNIOxx-5 (analog and digital i/o) boards. *
5 * *
6 * Copyright (C) 2006 Kruchinin Daniil (asgard) [asgard@etersoft.ru] *
7 * *
8 * COMEDI - Linux Control and Measurement Device Interface *
9 * Copyright (C) 1998,2000 David A. Schleef <ds@schleef.org> *
10 * *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
15 * *
16 * This program is distributed in the hope that it will be useful, *
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
19 * GNU General Public License for more details. *
20 * *
21 * You should have received a copy of the GNU General Public License *
22 * along with this program; if not, write to the Free Software *
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
24 * *
25 ***************************************************************************/
26 /*
27
28 Driver: unioxx5
29 Description: Driver for Fastwel UNIOxx-5 (analog and digital i/o) boards.
30 Author: Kruchinin Daniil (asgard) <asgard@etersoft.ru>
31 Status: unknown
32 Updated: 2006-10-09
33 Devices: [Fastwel] UNIOxx-5 (unioxx5),
34
35 This card supports digital and analog I/O. It written for g01
36 subdevices only.
37 channels range: 0 .. 23 dio channels
38 and 0 .. 11 analog modules range
39 During attaching unioxx5 module displays modules identifiers
40 (see dmesg after comedi_config) in format:
41 | [module_number] module_id |
42
43 */
44
45 #include "../comedidev.h"
46 #include <linux/ioport.h>
47
48 #define DRIVER_NAME "unioxx5"
49 #define UNIOXX5_SIZE 0x10
50 #define UNIOXX5_SUBDEV_BASE 0xA000 /* base addr of first subdev */
51 #define UNIOXX5_SUBDEV_ODDS 0x400
52
53 /* modules types */
54 #define MODULE_DIGITAL 0
55 #define MODULE_OUTPUT_MASK 0x80 /* analog input/output */
56
57 /* constants for digital i/o */
58 #define UNIOXX5_NUM_OF_CHANS 24
59
60 /* constants for analog i/o */
61 #define TxBE 0x10 /* transmit buffer enable */
62 #define RxCA 0x20 /* 1 receive character available */
63 #define Rx2CA 0x40 /* 2 receive character available */
64 #define Rx4CA 0x80 /* 4 receive character available */
65
66 /* bytes mask errors */
67 #define Rx2CA_ERR_MASK 0x04 /* 2 bytes receiving error */
68 #define Rx4CA_ERR_MASK 0x08 /* 4 bytes receiving error */
69
70 /* channel modes */
71 #define ALL_2_INPUT 0 /* config all digital channels to input */
72 #define ALL_2_OUTPUT 1 /* config all digital channels to output */
73
74 /* 'private' structure for each subdevice */
75 struct unioxx5_subd_priv {
76 int usp_iobase;
77 unsigned char usp_module_type[12]; /* 12 modules. each can be 70L or 73L */
78 unsigned char usp_extra_data[12][4]; /* for saving previous written value for analog modules */
79 unsigned char usp_prev_wr_val[3]; /* previous written value */
80 unsigned char usp_prev_cn_val[3]; /* previous channel value */
81 };
82
83 static int unioxx5_attach(struct comedi_device *dev,
84 struct comedi_devconfig *it);
85 static int unioxx5_subdev_write(struct comedi_device *dev,
86 struct comedi_subdevice *subdev,
87 struct comedi_insn *insn, unsigned int *data);
88 static int unioxx5_subdev_read(struct comedi_device *dev,
89 struct comedi_subdevice *subdev,
90 struct comedi_insn *insn, unsigned int *data);
91 static int unioxx5_insn_config(struct comedi_device *dev,
92 struct comedi_subdevice *subdev,
93 struct comedi_insn *insn, unsigned int *data);
94 static int unioxx5_detach(struct comedi_device *dev);
95 static int __unioxx5_subdev_init(struct comedi_subdevice *subdev,
96 int subdev_iobase, int minor);
97 static int __unioxx5_digital_write(struct unioxx5_subd_priv *usp,
98 unsigned int *data, int channel, int minor);
99 static int __unioxx5_digital_read(struct unioxx5_subd_priv *usp,
100 unsigned int *data, int channel, int minor);
101 /* static void __unioxx5_digital_config(struct unioxx5_subd_priv* usp, int mode); */
102 static int __unioxx5_analog_write(struct unioxx5_subd_priv *usp,
103 unsigned int *data, int channel, int minor);
104 static int __unioxx5_analog_read(struct unioxx5_subd_priv *usp,
105 unsigned int *data, int channel, int minor);
106 static int __unioxx5_define_chan_offset(int chan_num);
107 static void __unioxx5_analog_config(struct unioxx5_subd_priv *usp, int channel);
108
109 static struct comedi_driver unioxx5_driver = {
110 .driver_name = DRIVER_NAME,
111 .module = THIS_MODULE,
112 .attach = unioxx5_attach,
113 .detach = unioxx5_detach
114 };
115
116 COMEDI_INITCLEANUP(unioxx5_driver);
117
118 static int unioxx5_attach(struct comedi_device *dev,
119 struct comedi_devconfig *it)
120 {
121 int iobase, i, n_subd;
122 int id, num, ba;
123
124 iobase = it->options[0];
125
126 dev->board_name = DRIVER_NAME;
127 dev->iobase = iobase;
128 iobase += UNIOXX5_SUBDEV_BASE;
129
130 /* defining number of subdevices and getting they types (it must be 'g01') */
131 for (i = n_subd = 0, ba = iobase; i < 4; i++, ba += UNIOXX5_SUBDEV_ODDS) {
132 id = inb(ba + 0xE);
133 num = inb(ba + 0xF);
134
135 if (id != 'g' || num != 1)
136 continue;
137
138 n_subd++;
139 }
140
141 /* unioxx5 can has from two to four subdevices */
142 if (n_subd < 2) {
143 printk(KERN_ERR
144 "your card must has at least 2 'g01' subdevices\n");
145 return -1;
146 }
147
148 if (alloc_subdevices(dev, n_subd) < 0) {
149 printk(KERN_ERR "out of memory\n");
150 return -ENOMEM;
151 }
152
153 /* initializing each of for same subdevices */
154 for (i = 0; i < n_subd; i++, iobase += UNIOXX5_SUBDEV_ODDS) {
155 if (__unioxx5_subdev_init(&dev->subdevices[i], iobase,
156 dev->minor) < 0)
157 return -1;
158 }
159
160 printk("attached\n");
161 return 0;
162 }
163
164 static int unioxx5_subdev_read(struct comedi_device *dev,
165 struct comedi_subdevice *subdev,
166 struct comedi_insn *insn, unsigned int *data)
167 {
168 struct unioxx5_subd_priv *usp = subdev->private;
169 int channel, type;
170
171 channel = CR_CHAN(insn->chanspec);
172 type = usp->usp_module_type[channel / 2]; /* defining module type(analog or digital) */
173
174 if (type == MODULE_DIGITAL) {
175 if (!__unioxx5_digital_read(usp, data, channel, dev->minor))
176 return -1;
177 } else {
178 if (!__unioxx5_analog_read(usp, data, channel, dev->minor))
179 return -1;
180 }
181
182 return 1;
183 }
184
185 static int unioxx5_subdev_write(struct comedi_device *dev,
186 struct comedi_subdevice *subdev,
187 struct comedi_insn *insn, unsigned int *data)
188 {
189 struct unioxx5_subd_priv *usp = subdev->private;
190 int channel, type;
191
192 channel = CR_CHAN(insn->chanspec);
193 type = usp->usp_module_type[channel / 2]; /* defining module type(analog or digital) */
194
195 if (type == MODULE_DIGITAL) {
196 if (!__unioxx5_digital_write(usp, data, channel, dev->minor))
197 return -1;
198 } else {
199 if (!__unioxx5_analog_write(usp, data, channel, dev->minor))
200 return -1;
201 }
202
203 return 1;
204 }
205
206 /* for digital modules only */
207 static int unioxx5_insn_config(struct comedi_device *dev,
208 struct comedi_subdevice *subdev,
209 struct comedi_insn *insn, unsigned int *data)
210 {
211 int channel_offset, flags, channel = CR_CHAN(insn->chanspec), type;
212 struct unioxx5_subd_priv *usp = subdev->private;
213 int mask = 1 << (channel & 0x07);
214
215 type = usp->usp_module_type[channel / 2];
216
217 if (type != MODULE_DIGITAL) {
218 printk(KERN_ERR
219 "comedi%d: channel configuration accessible only for digital modules\n",
220 dev->minor);
221 return -1;
222 }
223
224 channel_offset = __unioxx5_define_chan_offset(channel);
225 if (channel_offset < 0) {
226 printk(KERN_ERR
227 "comedi%d: undefined channel %d. channel range is 0 .. 23\n",
228 dev->minor, channel);
229 return -1;
230 }
231
232 /* gets previously written value */
233 flags = usp->usp_prev_cn_val[channel_offset - 1];
234
235 switch (*data) {
236 case COMEDI_INPUT:
237 flags &= ~mask;
238 break;
239 case COMEDI_OUTPUT:
240 flags |= mask;
241 break;
242 default:
243 printk(KERN_ERR "comedi%d: unknown flag\n", dev->minor);
244 return -1;
245 }
246
247 /* *\
248 * sets channels buffer to 1(after this we are allowed to *
249 * change channel type on input or output) *
250 \* */
251 outb(1, usp->usp_iobase + 0);
252 outb(flags, usp->usp_iobase + channel_offset); /* changes type of _one_ channel */
253 outb(0, usp->usp_iobase + 0); /* sets channels bank to 0(allows directly input/output) */
254 usp->usp_prev_cn_val[channel_offset - 1] = flags; /* saves written value */
255
256 return 0;
257 }
258
259 static int unioxx5_detach(struct comedi_device *dev)
260 {
261 int i;
262 struct comedi_subdevice *subdev;
263 struct unioxx5_subd_priv *usp;
264
265 for (i = 0; i < dev->n_subdevices; i++) {
266 subdev = &dev->subdevices[i];
267 usp = subdev->private;
268 release_region(usp->usp_iobase, UNIOXX5_SIZE);
269 kfree(subdev->private);
270 }
271
272 return 0;
273 }
274
275 /* initializing subdevice with given address */
276 static int __unioxx5_subdev_init(struct comedi_subdevice *subdev,
277 int subdev_iobase, int minor)
278 {
279 struct unioxx5_subd_priv *usp;
280 int i, to, ndef_flag = 0;
281
282 if (!request_region(subdev_iobase, UNIOXX5_SIZE, DRIVER_NAME)) {
283 printk(KERN_ERR "comedi%d: I/O port conflict\n", minor);
284 return -EIO;
285 }
286
287 usp = (struct unioxx5_subd_priv *)kzalloc(sizeof(*usp), GFP_KERNEL);
288
289 if (usp == NULL) {
290 printk(KERN_ERR "comedi%d: erorr! --> out of memory!\n", minor);
291 return -1;
292 }
293
294 usp->usp_iobase = subdev_iobase;
295 printk("comedi%d: |", minor);
296
297 /* defining modules types */
298 for (i = 0; i < 12; i++) {
299 to = 10000;
300
301 __unioxx5_analog_config(usp, i * 2);
302 outb(i + 1, subdev_iobase + 5); /* sends channel number to card */
303 outb('H', subdev_iobase + 6); /* requests EEPROM world */
304 while (!(inb(subdev_iobase + 0) & TxBE)) ; /* waits while writting will be allowed */
305 outb(0, subdev_iobase + 6);
306
307 /* waits while reading of two bytes will be allowed */
308 while (!(inb(subdev_iobase + 0) & Rx2CA)) {
309 if (--to <= 0) {
310 ndef_flag = 1;
311 break;
312 }
313 }
314
315 if (ndef_flag) {
316 usp->usp_module_type[i] = 0;
317 ndef_flag = 0;
318 } else
319 usp->usp_module_type[i] = inb(subdev_iobase + 6);
320
321 printk(" [%d] 0x%02x |", i, usp->usp_module_type[i]);
322 udelay(1);
323 }
324
325 printk("\n");
326
327 /* initial subdevice for digital or analog i/o */
328 subdev->type = COMEDI_SUBD_DIO;
329 subdev->private = usp;
330 subdev->subdev_flags = SDF_READABLE | SDF_WRITABLE;
331 subdev->n_chan = UNIOXX5_NUM_OF_CHANS;
332 subdev->maxdata = 0xFFF;
333 subdev->range_table = &range_digital;
334 subdev->insn_read = unioxx5_subdev_read;
335 subdev->insn_write = unioxx5_subdev_write;
336 subdev->insn_config = unioxx5_insn_config; /* for digital modules only!!! */
337
338 printk("subdevice configured\n");
339
340 return 0;
341 }
342
343 static int __unioxx5_digital_write(struct unioxx5_subd_priv *usp,
344 unsigned int *data, int channel, int minor)
345 {
346 int channel_offset, val;
347 int mask = 1 << (channel & 0x07);
348
349 channel_offset = __unioxx5_define_chan_offset(channel);
350 if (channel_offset < 0) {
351 printk(KERN_ERR
352 "comedi%d: undefined channel %d. channel range is 0 .. 23\n",
353 minor, channel);
354 return 0;
355 }
356
357 val = usp->usp_prev_wr_val[channel_offset - 1]; /* getting previous written value */
358
359 if (*data)
360 val |= mask;
361 else
362 val &= ~mask;
363
364 outb(val, usp->usp_iobase + channel_offset);
365 usp->usp_prev_wr_val[channel_offset - 1] = val; /* saving new written value */
366
367 return 1;
368 }
369
370 /* function for digital reading */
371 static int __unioxx5_digital_read(struct unioxx5_subd_priv *usp,
372 unsigned int *data, int channel, int minor)
373 {
374 int channel_offset, mask = 1 << (channel & 0x07);
375
376 channel_offset = __unioxx5_define_chan_offset(channel);
377 if (channel_offset < 0) {
378 printk(KERN_ERR
379 "comedi%d: undefined channel %d. channel range is 0 .. 23\n",
380 minor, channel);
381 return 0;
382 }
383
384 *data = inb(usp->usp_iobase + channel_offset);
385 *data &= mask;
386
387 if (channel_offset > 1)
388 channel -= 2 << channel_offset; /* this operation is created for correct readed value to 0 or 1 */
389
390 *data >>= channel;
391 return 1;
392 }
393
394 #if 0 /* not used? */
395 static void __unioxx5_digital_config(struct unioxx5_subd_priv *usp, int mode)
396 {
397 int i, mask;
398
399 mask = (mode == ALL_2_OUTPUT) ? 0xFF : 0x00;
400 printk("COMEDI: mode = %d\n", mask);
401
402 outb(1, usp->usp_iobase + 0);
403
404 for (i = 0; i < 3; i++)
405 outb(mask, usp->usp_iobase + i);
406
407 outb(0, usp->usp_iobase + 0);
408 }
409 #endif
410
411 static int __unioxx5_analog_write(struct unioxx5_subd_priv *usp,
412 unsigned int *data, int channel, int minor)
413 {
414 int module, i;
415
416 module = channel / 2; /* definig module number(0 .. 11) */
417 i = (channel % 2) << 1; /* depends on type of channel (A or B) */
418
419 /* defining if given module can work on output */
420 if (!(usp->usp_module_type[module] & MODULE_OUTPUT_MASK)) {
421 printk(KERN_ERR
422 "comedi%d: module in position %d with id 0x%0x is for input only!\n",
423 minor, module, usp->usp_module_type[module]);
424 return 0;
425 }
426
427 __unioxx5_analog_config(usp, channel);
428 /* saving minor byte */
429 usp->usp_extra_data[module][i++] = (unsigned char)(*data & 0x00FF);
430 /* saving major byte */
431 usp->usp_extra_data[module][i] = (unsigned char)((*data & 0xFF00) >> 8);
432
433 /* while(!((inb(usp->usp_iobase + 0)) & TxBE)); */
434 outb(module + 1, usp->usp_iobase + 5); /* sending module number to card(1 .. 12) */
435 outb('W', usp->usp_iobase + 6); /* sends (W)rite command to module */
436
437 /* sending for bytes to module(one byte per cycle iteration) */
438 for (i = 0; i < 4; i++) {
439 while (!((inb(usp->usp_iobase + 0)) & TxBE)) ; /* waits while writting will be allowed */
440 outb(usp->usp_extra_data[module][i], usp->usp_iobase + 6);
441 }
442
443 return 1;
444 }
445
446 static int __unioxx5_analog_read(struct unioxx5_subd_priv *usp,
447 unsigned int *data, int channel, int minor)
448 {
449 int module_no, read_ch;
450 char control;
451
452 module_no = channel / 2;
453 read_ch = channel % 2; /* depend on type of channel (A or B) */
454
455 /* defining if given module can work on input */
456 if (usp->usp_module_type[module_no] & MODULE_OUTPUT_MASK) {
457 printk(KERN_ERR
458 "comedi%d: module in position %d with id 0x%02x is for output only",
459 minor, module_no, usp->usp_module_type[module_no]);
460 return 0;
461 }
462
463 __unioxx5_analog_config(usp, channel);
464 outb(module_no + 1, usp->usp_iobase + 5); /* sends module number to card(1 .. 12) */
465 outb('V', usp->usp_iobase + 6); /* sends to module (V)erify command */
466 control = inb(usp->usp_iobase); /* get control register byte */
467
468 /* waits while reading four bytes will be allowed */
469 while (!((control = inb(usp->usp_iobase + 0)) & Rx4CA)) ;
470
471 /* if four bytes readding error occurs - return 0(false) */
472 if ((control & Rx4CA_ERR_MASK)) {
473 printk("COMEDI: 4 bytes error\n");
474 return 0;
475 }
476
477 if (read_ch)
478 *data = inw(usp->usp_iobase + 6); /* channel B */
479 else
480 *data = inw(usp->usp_iobase + 4); /* channel A */
481
482 return 1;
483 }
484
485 /* configure channels for analog i/o (even to output, odd to input) */
486 static void __unioxx5_analog_config(struct unioxx5_subd_priv *usp, int channel)
487 {
488 int chan_a, chan_b, conf, channel_offset;
489
490 channel_offset = __unioxx5_define_chan_offset(channel);
491 conf = usp->usp_prev_cn_val[channel_offset - 1];
492 chan_a = chan_b = 1;
493
494 /* setting channel A and channel B mask */
495 if (channel % 2 == 0) {
496 chan_a <<= channel & 0x07;
497 chan_b <<= (channel + 1) & 0x07;
498 } else {
499 chan_a <<= (channel - 1) & 0x07;
500 chan_b <<= channel & 0x07;
501 }
502
503 conf |= chan_a; /* even channel ot output */
504 conf &= ~chan_b; /* odd channel to input */
505
506 outb(1, usp->usp_iobase + 0);
507 outb(conf, usp->usp_iobase + channel_offset);
508 outb(0, usp->usp_iobase + 0);
509
510 usp->usp_prev_cn_val[channel_offset - 1] = conf;
511 }
512
513 /* *\
514 * this function defines if the given channel number *
515 * enters in default numeric interspace(from 0 to 23) *
516 * and it returns address offset for usage needed *
517 * channel. *
518 \* */
519
520 static int __unioxx5_define_chan_offset(int chan_num)
521 {
522
523 if (chan_num < 0 || chan_num > 23)
524 return -1;
525
526 return (chan_num >> 3) + 1;
527 }
Support for the Chinese Samsung S3C2440 based development boards