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staging: comedi: comedi_test: simplify time since last AI scan
[deliverable/linux.git] / drivers / staging / comedi / drivers / usbduxsigma.c
1 /*
2 * usbduxsigma.c
3 * Copyright (C) 2011-2015 Bernd Porr, mail@berndporr.me.uk
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 */
15
16 /*
17 * Driver: usbduxsigma
18 * Description: University of Stirling USB DAQ & INCITE Technology Limited
19 * Devices: [ITL] USB-DUX-SIGMA (usbduxsigma)
20 * Author: Bernd Porr <mail@berndporr.me.uk>
21 * Updated: 20 July 2015
22 * Status: stable
23 */
24
25 /*
26 * I must give credit here to Chris Baugher who
27 * wrote the driver for AT-MIO-16d. I used some parts of this
28 * driver. I also must give credits to David Brownell
29 * who supported me with the USB development.
30 *
31 * Note: the raw data from the A/D converter is 24 bit big endian
32 * anything else is little endian to/from the dux board
33 *
34 *
35 * Revision history:
36 * 0.1: initial version
37 * 0.2: all basic functions implemented, digital I/O only for one port
38 * 0.3: proper vendor ID and driver name
39 * 0.4: fixed D/A voltage range
40 * 0.5: various bug fixes, health check at startup
41 * 0.6: corrected wrong input range
42 * 0.7: rewrite code that urb->interval is always 1
43 */
44
45 #include <linux/kernel.h>
46 #include <linux/module.h>
47 #include <linux/slab.h>
48 #include <linux/input.h>
49 #include <linux/fcntl.h>
50 #include <linux/compiler.h>
51 #include <asm/unaligned.h>
52
53 #include "../comedi_usb.h"
54
55 /* timeout for the USB-transfer in ms*/
56 #define BULK_TIMEOUT 1000
57
58 /* constants for "firmware" upload and download */
59 #define FIRMWARE "usbduxsigma_firmware.bin"
60 #define FIRMWARE_MAX_LEN 0x4000
61 #define USBDUXSUB_FIRMWARE 0xa0
62 #define VENDOR_DIR_IN 0xc0
63 #define VENDOR_DIR_OUT 0x40
64
65 /* internal addresses of the 8051 processor */
66 #define USBDUXSUB_CPUCS 0xE600
67
68 /* 300Hz max frequ under PWM */
69 #define MIN_PWM_PERIOD ((long)(1E9 / 300))
70
71 /* Default PWM frequency */
72 #define PWM_DEFAULT_PERIOD ((long)(1E9 / 100))
73
74 /* Number of channels (16 AD and offset)*/
75 #define NUMCHANNELS 16
76
77 /* Size of one A/D value */
78 #define SIZEADIN ((sizeof(u32)))
79
80 /*
81 * Size of the async input-buffer IN BYTES, the DIO state is transmitted
82 * as the first byte.
83 */
84 #define SIZEINBUF (((NUMCHANNELS + 1) * SIZEADIN))
85
86 /* 16 bytes. */
87 #define SIZEINSNBUF 16
88
89 /* Number of DA channels */
90 #define NUMOUTCHANNELS 8
91
92 /* size of one value for the D/A converter: channel and value */
93 #define SIZEDAOUT ((sizeof(u8) + sizeof(uint16_t)))
94
95 /*
96 * Size of the output-buffer in bytes
97 * Actually only the first 4 triplets are used but for the
98 * high speed mode we need to pad it to 8 (microframes).
99 */
100 #define SIZEOUTBUF ((8 * SIZEDAOUT))
101
102 /*
103 * Size of the buffer for the dux commands: just now max size is determined
104 * by the analogue out + command byte + panic bytes...
105 */
106 #define SIZEOFDUXBUFFER ((8 * SIZEDAOUT + 2))
107
108 /* Number of in-URBs which receive the data: min=2 */
109 #define NUMOFINBUFFERSFULL 5
110
111 /* Number of out-URBs which send the data: min=2 */
112 #define NUMOFOUTBUFFERSFULL 5
113
114 /* Number of in-URBs which receive the data: min=5 */
115 /* must have more buffers due to buggy USB ctr */
116 #define NUMOFINBUFFERSHIGH 10
117
118 /* Number of out-URBs which send the data: min=5 */
119 /* must have more buffers due to buggy USB ctr */
120 #define NUMOFOUTBUFFERSHIGH 10
121
122 /* number of retries to get the right dux command */
123 #define RETRIES 10
124
125 /* bulk transfer commands to usbduxsigma */
126 #define USBBUXSIGMA_AD_CMD 9
127 #define USBDUXSIGMA_DA_CMD 1
128 #define USBDUXSIGMA_DIO_CFG_CMD 2
129 #define USBDUXSIGMA_DIO_BITS_CMD 3
130 #define USBDUXSIGMA_SINGLE_AD_CMD 4
131 #define USBDUXSIGMA_PWM_ON_CMD 7
132 #define USBDUXSIGMA_PWM_OFF_CMD 8
133
134 static const struct comedi_lrange usbduxsigma_ai_range = {
135 1, {
136 BIP_RANGE(2.5 * 0x800000 / 0x780000 / 2.0)
137 }
138 };
139
140 struct usbduxsigma_private {
141 /* actual number of in-buffers */
142 int n_ai_urbs;
143 /* actual number of out-buffers */
144 int n_ao_urbs;
145 /* ISO-transfer handling: buffers */
146 struct urb **ai_urbs;
147 struct urb **ao_urbs;
148 /* pwm-transfer handling */
149 struct urb *pwm_urb;
150 /* PWM period */
151 unsigned int pwm_period;
152 /* PWM internal delay for the GPIF in the FX2 */
153 u8 pwm_delay;
154 /* size of the PWM buffer which holds the bit pattern */
155 int pwm_buf_sz;
156 /* input buffer for the ISO-transfer */
157 __be32 *in_buf;
158 /* input buffer for single insn */
159 u8 *insn_buf;
160
161 unsigned high_speed:1;
162 unsigned ai_cmd_running:1;
163 unsigned ao_cmd_running:1;
164 unsigned pwm_cmd_running:1;
165
166 /* time between samples in units of the timer */
167 unsigned int ai_timer;
168 unsigned int ao_timer;
169 /* counter between acquisitions */
170 unsigned int ai_counter;
171 unsigned int ao_counter;
172 /* interval in frames/uframes */
173 unsigned int ai_interval;
174 /* commands */
175 u8 *dux_commands;
176 struct mutex mut;
177 };
178
179 static void usbduxsigma_unlink_urbs(struct urb **urbs, int num_urbs)
180 {
181 int i;
182
183 for (i = 0; i < num_urbs; i++)
184 usb_kill_urb(urbs[i]);
185 }
186
187 static void usbduxsigma_ai_stop(struct comedi_device *dev, int do_unlink)
188 {
189 struct usbduxsigma_private *devpriv = dev->private;
190
191 if (do_unlink && devpriv->ai_urbs)
192 usbduxsigma_unlink_urbs(devpriv->ai_urbs, devpriv->n_ai_urbs);
193
194 devpriv->ai_cmd_running = 0;
195 }
196
197 static int usbduxsigma_ai_cancel(struct comedi_device *dev,
198 struct comedi_subdevice *s)
199 {
200 struct usbduxsigma_private *devpriv = dev->private;
201
202 mutex_lock(&devpriv->mut);
203 /* unlink only if it is really running */
204 usbduxsigma_ai_stop(dev, devpriv->ai_cmd_running);
205 mutex_unlock(&devpriv->mut);
206
207 return 0;
208 }
209
210 static void usbduxsigma_ai_handle_urb(struct comedi_device *dev,
211 struct comedi_subdevice *s,
212 struct urb *urb)
213 {
214 struct usbduxsigma_private *devpriv = dev->private;
215 struct comedi_async *async = s->async;
216 struct comedi_cmd *cmd = &async->cmd;
217 u32 val;
218 int ret;
219 int i;
220
221 if ((urb->actual_length > 0) && (urb->status != -EXDEV)) {
222 devpriv->ai_counter--;
223 if (devpriv->ai_counter == 0) {
224 devpriv->ai_counter = devpriv->ai_timer;
225
226 /*
227 * Get the data from the USB bus and hand it over
228 * to comedi. Note, first byte is the DIO state.
229 */
230 for (i = 0; i < cmd->chanlist_len; i++) {
231 val = be32_to_cpu(devpriv->in_buf[i + 1]);
232 val &= 0x00ffffff; /* strip status byte */
233 val = comedi_offset_munge(s, val);
234 if (!comedi_buf_write_samples(s, &val, 1))
235 return;
236 }
237
238 if (cmd->stop_src == TRIG_COUNT &&
239 async->scans_done >= cmd->stop_arg)
240 async->events |= COMEDI_CB_EOA;
241 }
242 }
243
244 /* if command is still running, resubmit urb */
245 if (!(async->events & COMEDI_CB_CANCEL_MASK)) {
246 urb->dev = comedi_to_usb_dev(dev);
247 ret = usb_submit_urb(urb, GFP_ATOMIC);
248 if (ret < 0) {
249 dev_err(dev->class_dev, "urb resubmit failed (%d)\n",
250 ret);
251 if (ret == -EL2NSYNC)
252 dev_err(dev->class_dev,
253 "buggy USB host controller or bug in IRQ handler\n");
254 async->events |= COMEDI_CB_ERROR;
255 }
256 }
257 }
258
259 static void usbduxsigma_ai_urb_complete(struct urb *urb)
260 {
261 struct comedi_device *dev = urb->context;
262 struct usbduxsigma_private *devpriv = dev->private;
263 struct comedi_subdevice *s = dev->read_subdev;
264 struct comedi_async *async = s->async;
265
266 /* exit if not running a command, do not resubmit urb */
267 if (!devpriv->ai_cmd_running)
268 return;
269
270 switch (urb->status) {
271 case 0:
272 /* copy the result in the transfer buffer */
273 memcpy(devpriv->in_buf, urb->transfer_buffer, SIZEINBUF);
274 usbduxsigma_ai_handle_urb(dev, s, urb);
275 break;
276
277 case -EILSEQ:
278 /*
279 * error in the ISOchronous data
280 * we don't copy the data into the transfer buffer
281 * and recycle the last data byte
282 */
283 dev_dbg(dev->class_dev, "CRC error in ISO IN stream\n");
284 usbduxsigma_ai_handle_urb(dev, s, urb);
285 break;
286
287 case -ECONNRESET:
288 case -ENOENT:
289 case -ESHUTDOWN:
290 case -ECONNABORTED:
291 /* happens after an unlink command */
292 async->events |= COMEDI_CB_ERROR;
293 break;
294
295 default:
296 /* a real error */
297 dev_err(dev->class_dev, "non-zero urb status (%d)\n",
298 urb->status);
299 async->events |= COMEDI_CB_ERROR;
300 break;
301 }
302
303 /*
304 * comedi_handle_events() cannot be used in this driver. The (*cancel)
305 * operation would unlink the urb.
306 */
307 if (async->events & COMEDI_CB_CANCEL_MASK)
308 usbduxsigma_ai_stop(dev, 0);
309
310 comedi_event(dev, s);
311 }
312
313 static void usbduxsigma_ao_stop(struct comedi_device *dev, int do_unlink)
314 {
315 struct usbduxsigma_private *devpriv = dev->private;
316
317 if (do_unlink && devpriv->ao_urbs)
318 usbduxsigma_unlink_urbs(devpriv->ao_urbs, devpriv->n_ao_urbs);
319
320 devpriv->ao_cmd_running = 0;
321 }
322
323 static int usbduxsigma_ao_cancel(struct comedi_device *dev,
324 struct comedi_subdevice *s)
325 {
326 struct usbduxsigma_private *devpriv = dev->private;
327
328 mutex_lock(&devpriv->mut);
329 /* unlink only if it is really running */
330 usbduxsigma_ao_stop(dev, devpriv->ao_cmd_running);
331 mutex_unlock(&devpriv->mut);
332
333 return 0;
334 }
335
336 static void usbduxsigma_ao_handle_urb(struct comedi_device *dev,
337 struct comedi_subdevice *s,
338 struct urb *urb)
339 {
340 struct usbduxsigma_private *devpriv = dev->private;
341 struct comedi_async *async = s->async;
342 struct comedi_cmd *cmd = &async->cmd;
343 u8 *datap;
344 int ret;
345 int i;
346
347 devpriv->ao_counter--;
348 if (devpriv->ao_counter == 0) {
349 devpriv->ao_counter = devpriv->ao_timer;
350
351 if (cmd->stop_src == TRIG_COUNT &&
352 async->scans_done >= cmd->stop_arg) {
353 async->events |= COMEDI_CB_EOA;
354 return;
355 }
356
357 /* transmit data to the USB bus */
358 datap = urb->transfer_buffer;
359 *datap++ = cmd->chanlist_len;
360 for (i = 0; i < cmd->chanlist_len; i++) {
361 unsigned int chan = CR_CHAN(cmd->chanlist[i]);
362 unsigned short val;
363
364 if (!comedi_buf_read_samples(s, &val, 1)) {
365 dev_err(dev->class_dev, "buffer underflow\n");
366 async->events |= COMEDI_CB_OVERFLOW;
367 return;
368 }
369
370 *datap++ = val;
371 *datap++ = chan;
372 s->readback[chan] = val;
373 }
374 }
375
376 /* if command is still running, resubmit urb */
377 if (!(async->events & COMEDI_CB_CANCEL_MASK)) {
378 urb->transfer_buffer_length = SIZEOUTBUF;
379 urb->dev = comedi_to_usb_dev(dev);
380 urb->status = 0;
381 urb->interval = 1; /* (u)frames */
382 urb->number_of_packets = 1;
383 urb->iso_frame_desc[0].offset = 0;
384 urb->iso_frame_desc[0].length = SIZEOUTBUF;
385 urb->iso_frame_desc[0].status = 0;
386 ret = usb_submit_urb(urb, GFP_ATOMIC);
387 if (ret < 0) {
388 dev_err(dev->class_dev, "urb resubmit failed (%d)\n",
389 ret);
390 if (ret == -EL2NSYNC)
391 dev_err(dev->class_dev,
392 "buggy USB host controller or bug in IRQ handler\n");
393 async->events |= COMEDI_CB_ERROR;
394 }
395 }
396 }
397
398 static void usbduxsigma_ao_urb_complete(struct urb *urb)
399 {
400 struct comedi_device *dev = urb->context;
401 struct usbduxsigma_private *devpriv = dev->private;
402 struct comedi_subdevice *s = dev->write_subdev;
403 struct comedi_async *async = s->async;
404
405 /* exit if not running a command, do not resubmit urb */
406 if (!devpriv->ao_cmd_running)
407 return;
408
409 switch (urb->status) {
410 case 0:
411 usbduxsigma_ao_handle_urb(dev, s, urb);
412 break;
413
414 case -ECONNRESET:
415 case -ENOENT:
416 case -ESHUTDOWN:
417 case -ECONNABORTED:
418 /* happens after an unlink command */
419 async->events |= COMEDI_CB_ERROR;
420 break;
421
422 default:
423 /* a real error */
424 dev_err(dev->class_dev, "non-zero urb status (%d)\n",
425 urb->status);
426 async->events |= COMEDI_CB_ERROR;
427 break;
428 }
429
430 /*
431 * comedi_handle_events() cannot be used in this driver. The (*cancel)
432 * operation would unlink the urb.
433 */
434 if (async->events & COMEDI_CB_CANCEL_MASK)
435 usbduxsigma_ao_stop(dev, 0);
436
437 comedi_event(dev, s);
438 }
439
440 static int usbduxsigma_submit_urbs(struct comedi_device *dev,
441 struct urb **urbs, int num_urbs,
442 int input_urb)
443 {
444 struct usb_device *usb = comedi_to_usb_dev(dev);
445 struct urb *urb;
446 int ret;
447 int i;
448
449 /* Submit all URBs and start the transfer on the bus */
450 for (i = 0; i < num_urbs; i++) {
451 urb = urbs[i];
452
453 /* in case of a resubmission after an unlink... */
454 if (input_urb)
455 urb->interval = 1;
456 urb->context = dev;
457 urb->dev = usb;
458 urb->status = 0;
459 urb->transfer_flags = URB_ISO_ASAP;
460
461 ret = usb_submit_urb(urb, GFP_ATOMIC);
462 if (ret)
463 return ret;
464 }
465 return 0;
466 }
467
468 static int usbduxsigma_chans_to_interval(int num_chan)
469 {
470 if (num_chan <= 2)
471 return 2; /* 4kHz */
472 if (num_chan <= 8)
473 return 4; /* 2kHz */
474 return 8; /* 1kHz */
475 }
476
477 static int usbduxsigma_ai_cmdtest(struct comedi_device *dev,
478 struct comedi_subdevice *s,
479 struct comedi_cmd *cmd)
480 {
481 struct usbduxsigma_private *devpriv = dev->private;
482 int high_speed = devpriv->high_speed;
483 int interval = usbduxsigma_chans_to_interval(cmd->chanlist_len);
484 unsigned int tmp;
485 int err = 0;
486
487 /* Step 1 : check if triggers are trivially valid */
488
489 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
490 err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_TIMER);
491 err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW);
492 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
493 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
494
495 if (err)
496 return 1;
497
498 /* Step 2a : make sure trigger sources are unique */
499
500 err |= comedi_check_trigger_is_unique(cmd->start_src);
501 err |= comedi_check_trigger_is_unique(cmd->stop_src);
502
503 /* Step 2b : and mutually compatible */
504
505 if (err)
506 return 2;
507
508 /* Step 3: check if arguments are trivially valid */
509
510 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
511
512 if (high_speed) {
513 /*
514 * In high speed mode microframes are possible.
515 * However, during one microframe we can roughly
516 * sample two channels. Thus, the more channels
517 * are in the channel list the more time we need.
518 */
519 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
520 (125000 * interval));
521 } else {
522 /* full speed */
523 /* 1kHz scans every USB frame */
524 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
525 1000000);
526 }
527
528 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
529 cmd->chanlist_len);
530
531 if (cmd->stop_src == TRIG_COUNT)
532 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
533 else /* TRIG_NONE */
534 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
535
536 if (err)
537 return 3;
538
539 /* Step 4: fix up any arguments */
540
541 tmp = rounddown(cmd->scan_begin_arg, high_speed ? 125000 : 1000000);
542 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, tmp);
543
544 if (err)
545 return 4;
546
547 return 0;
548 }
549
550 /*
551 * creates the ADC command for the MAX1271
552 * range is the range value from comedi
553 */
554 static void create_adc_command(unsigned int chan,
555 u8 *muxsg0, u8 *muxsg1)
556 {
557 if (chan < 8)
558 (*muxsg0) = (*muxsg0) | (1 << chan);
559 else if (chan < 16)
560 (*muxsg1) = (*muxsg1) | (1 << (chan - 8));
561 }
562
563 static int usbbuxsigma_send_cmd(struct comedi_device *dev, int cmd_type)
564 {
565 struct usb_device *usb = comedi_to_usb_dev(dev);
566 struct usbduxsigma_private *devpriv = dev->private;
567 int nsent;
568
569 devpriv->dux_commands[0] = cmd_type;
570
571 return usb_bulk_msg(usb, usb_sndbulkpipe(usb, 1),
572 devpriv->dux_commands, SIZEOFDUXBUFFER,
573 &nsent, BULK_TIMEOUT);
574 }
575
576 static int usbduxsigma_receive_cmd(struct comedi_device *dev, int command)
577 {
578 struct usb_device *usb = comedi_to_usb_dev(dev);
579 struct usbduxsigma_private *devpriv = dev->private;
580 int nrec;
581 int ret;
582 int i;
583
584 for (i = 0; i < RETRIES; i++) {
585 ret = usb_bulk_msg(usb, usb_rcvbulkpipe(usb, 8),
586 devpriv->insn_buf, SIZEINSNBUF,
587 &nrec, BULK_TIMEOUT);
588 if (ret < 0)
589 return ret;
590
591 if (devpriv->insn_buf[0] == command)
592 return 0;
593 }
594 /*
595 * This is only reached if the data has been requested a
596 * couple of times and the command was not received.
597 */
598 return -EFAULT;
599 }
600
601 static int usbduxsigma_ai_inttrig(struct comedi_device *dev,
602 struct comedi_subdevice *s,
603 unsigned int trig_num)
604 {
605 struct usbduxsigma_private *devpriv = dev->private;
606 struct comedi_cmd *cmd = &s->async->cmd;
607 int ret;
608
609 if (trig_num != cmd->start_arg)
610 return -EINVAL;
611
612 mutex_lock(&devpriv->mut);
613 if (!devpriv->ai_cmd_running) {
614 devpriv->ai_cmd_running = 1;
615 ret = usbduxsigma_submit_urbs(dev, devpriv->ai_urbs,
616 devpriv->n_ai_urbs, 1);
617 if (ret < 0) {
618 devpriv->ai_cmd_running = 0;
619 mutex_unlock(&devpriv->mut);
620 return ret;
621 }
622 s->async->inttrig = NULL;
623 }
624 mutex_unlock(&devpriv->mut);
625
626 return 1;
627 }
628
629 static int usbduxsigma_ai_cmd(struct comedi_device *dev,
630 struct comedi_subdevice *s)
631 {
632 struct usbduxsigma_private *devpriv = dev->private;
633 struct comedi_cmd *cmd = &s->async->cmd;
634 unsigned int len = cmd->chanlist_len;
635 u8 muxsg0 = 0;
636 u8 muxsg1 = 0;
637 u8 sysred = 0;
638 int ret;
639 int i;
640
641 mutex_lock(&devpriv->mut);
642
643 if (devpriv->high_speed) {
644 /*
645 * every 2 channels get a time window of 125us. Thus, if we
646 * sample all 16 channels we need 1ms. If we sample only one
647 * channel we need only 125us
648 */
649 unsigned int interval = usbduxsigma_chans_to_interval(len);
650
651 devpriv->ai_interval = interval;
652 devpriv->ai_timer = cmd->scan_begin_arg / (125000 * interval);
653 } else {
654 /* interval always 1ms */
655 devpriv->ai_interval = 1;
656 devpriv->ai_timer = cmd->scan_begin_arg / 1000000;
657 }
658
659 for (i = 0; i < len; i++) {
660 unsigned int chan = CR_CHAN(cmd->chanlist[i]);
661
662 create_adc_command(chan, &muxsg0, &muxsg1);
663 }
664
665 devpriv->dux_commands[1] = devpriv->ai_interval;
666 devpriv->dux_commands[2] = len; /* num channels per time step */
667 devpriv->dux_commands[3] = 0x12; /* CONFIG0 */
668 devpriv->dux_commands[4] = 0x03; /* CONFIG1: 23kHz sample, delay 0us */
669 devpriv->dux_commands[5] = 0x00; /* CONFIG3: diff. channels off */
670 devpriv->dux_commands[6] = muxsg0;
671 devpriv->dux_commands[7] = muxsg1;
672 devpriv->dux_commands[8] = sysred;
673
674 ret = usbbuxsigma_send_cmd(dev, USBBUXSIGMA_AD_CMD);
675 if (ret < 0) {
676 mutex_unlock(&devpriv->mut);
677 return ret;
678 }
679
680 devpriv->ai_counter = devpriv->ai_timer;
681
682 if (cmd->start_src == TRIG_NOW) {
683 /* enable this acquisition operation */
684 devpriv->ai_cmd_running = 1;
685 ret = usbduxsigma_submit_urbs(dev, devpriv->ai_urbs,
686 devpriv->n_ai_urbs, 1);
687 if (ret < 0) {
688 devpriv->ai_cmd_running = 0;
689 mutex_unlock(&devpriv->mut);
690 return ret;
691 }
692 s->async->inttrig = NULL;
693 } else { /* TRIG_INT */
694 s->async->inttrig = usbduxsigma_ai_inttrig;
695 }
696
697 mutex_unlock(&devpriv->mut);
698
699 return 0;
700 }
701
702 static int usbduxsigma_ai_insn_read(struct comedi_device *dev,
703 struct comedi_subdevice *s,
704 struct comedi_insn *insn,
705 unsigned int *data)
706 {
707 struct usbduxsigma_private *devpriv = dev->private;
708 unsigned int chan = CR_CHAN(insn->chanspec);
709 u8 muxsg0 = 0;
710 u8 muxsg1 = 0;
711 u8 sysred = 0;
712 int ret;
713 int i;
714
715 mutex_lock(&devpriv->mut);
716 if (devpriv->ai_cmd_running) {
717 mutex_unlock(&devpriv->mut);
718 return -EBUSY;
719 }
720
721 create_adc_command(chan, &muxsg0, &muxsg1);
722
723 /* Mode 0 is used to get a single conversion on demand */
724 devpriv->dux_commands[1] = 0x16; /* CONFIG0: chopper on */
725 devpriv->dux_commands[2] = 0x80; /* CONFIG1: 2kHz sampling rate */
726 devpriv->dux_commands[3] = 0x00; /* CONFIG3: diff. channels off */
727 devpriv->dux_commands[4] = muxsg0;
728 devpriv->dux_commands[5] = muxsg1;
729 devpriv->dux_commands[6] = sysred;
730
731 /* adc commands */
732 ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD);
733 if (ret < 0) {
734 mutex_unlock(&devpriv->mut);
735 return ret;
736 }
737
738 for (i = 0; i < insn->n; i++) {
739 u32 val;
740
741 ret = usbduxsigma_receive_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD);
742 if (ret < 0) {
743 mutex_unlock(&devpriv->mut);
744 return ret;
745 }
746
747 /* 32 bits big endian from the A/D converter */
748 val = be32_to_cpu(get_unaligned((__be32
749 *)(devpriv->insn_buf + 1)));
750 val &= 0x00ffffff; /* strip status byte */
751 data[i] = comedi_offset_munge(s, val);
752 }
753 mutex_unlock(&devpriv->mut);
754
755 return insn->n;
756 }
757
758 static int usbduxsigma_ao_insn_read(struct comedi_device *dev,
759 struct comedi_subdevice *s,
760 struct comedi_insn *insn,
761 unsigned int *data)
762 {
763 struct usbduxsigma_private *devpriv = dev->private;
764 int ret;
765
766 mutex_lock(&devpriv->mut);
767 ret = comedi_readback_insn_read(dev, s, insn, data);
768 mutex_unlock(&devpriv->mut);
769
770 return ret;
771 }
772
773 static int usbduxsigma_ao_insn_write(struct comedi_device *dev,
774 struct comedi_subdevice *s,
775 struct comedi_insn *insn,
776 unsigned int *data)
777 {
778 struct usbduxsigma_private *devpriv = dev->private;
779 unsigned int chan = CR_CHAN(insn->chanspec);
780 int ret;
781 int i;
782
783 mutex_lock(&devpriv->mut);
784 if (devpriv->ao_cmd_running) {
785 mutex_unlock(&devpriv->mut);
786 return -EBUSY;
787 }
788
789 for (i = 0; i < insn->n; i++) {
790 devpriv->dux_commands[1] = 1; /* num channels */
791 devpriv->dux_commands[2] = data[i]; /* value */
792 devpriv->dux_commands[3] = chan; /* channel number */
793 ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_DA_CMD);
794 if (ret < 0) {
795 mutex_unlock(&devpriv->mut);
796 return ret;
797 }
798 s->readback[chan] = data[i];
799 }
800 mutex_unlock(&devpriv->mut);
801
802 return insn->n;
803 }
804
805 static int usbduxsigma_ao_inttrig(struct comedi_device *dev,
806 struct comedi_subdevice *s,
807 unsigned int trig_num)
808 {
809 struct usbduxsigma_private *devpriv = dev->private;
810 struct comedi_cmd *cmd = &s->async->cmd;
811 int ret;
812
813 if (trig_num != cmd->start_arg)
814 return -EINVAL;
815
816 mutex_lock(&devpriv->mut);
817 if (!devpriv->ao_cmd_running) {
818 devpriv->ao_cmd_running = 1;
819 ret = usbduxsigma_submit_urbs(dev, devpriv->ao_urbs,
820 devpriv->n_ao_urbs, 0);
821 if (ret < 0) {
822 devpriv->ao_cmd_running = 0;
823 mutex_unlock(&devpriv->mut);
824 return ret;
825 }
826 s->async->inttrig = NULL;
827 }
828 mutex_unlock(&devpriv->mut);
829
830 return 1;
831 }
832
833 static int usbduxsigma_ao_cmdtest(struct comedi_device *dev,
834 struct comedi_subdevice *s,
835 struct comedi_cmd *cmd)
836 {
837 struct usbduxsigma_private *devpriv = dev->private;
838 unsigned int tmp;
839 int err = 0;
840
841 /* Step 1 : check if triggers are trivially valid */
842
843 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
844
845 /*
846 * For now, always use "scan" timing with all channels updated at once
847 * (cmd->scan_begin_src == TRIG_TIMER, cmd->convert_src == TRIG_NOW).
848 *
849 * In a future version, "convert" timing with channels updated
850 * indivually may be supported in high speed mode
851 * (cmd->scan_begin_src == TRIG_FOLLOW, cmd->convert_src == TRIG_TIMER).
852 */
853 err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_TIMER);
854 err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW);
855 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
856 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
857
858 if (err) {
859 mutex_unlock(&devpriv->mut);
860 return 1;
861 }
862
863 /* Step 2a : make sure trigger sources are unique */
864
865 err |= comedi_check_trigger_is_unique(cmd->start_src);
866 err |= comedi_check_trigger_is_unique(cmd->stop_src);
867
868 /* Step 2b : and mutually compatible */
869
870 if (err)
871 return 2;
872
873 /* Step 3: check if arguments are trivially valid */
874
875 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
876
877 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg, 1000000);
878
879 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
880 cmd->chanlist_len);
881
882 if (cmd->stop_src == TRIG_COUNT)
883 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
884 else /* TRIG_NONE */
885 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
886
887 if (err)
888 return 3;
889
890 /* Step 4: fix up any arguments */
891
892 tmp = rounddown(cmd->scan_begin_arg, 1000000);
893 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, tmp);
894
895 if (err)
896 return 4;
897
898 return 0;
899 }
900
901 static int usbduxsigma_ao_cmd(struct comedi_device *dev,
902 struct comedi_subdevice *s)
903 {
904 struct usbduxsigma_private *devpriv = dev->private;
905 struct comedi_cmd *cmd = &s->async->cmd;
906 int ret;
907
908 mutex_lock(&devpriv->mut);
909
910 /*
911 * For now, only "scan" timing is supported. A future version may
912 * support "convert" timing in high speed mode.
913 *
914 * Timing of the scan: every 1ms all channels updated at once.
915 */
916 devpriv->ao_timer = cmd->scan_begin_arg / 1000000;
917
918 devpriv->ao_counter = devpriv->ao_timer;
919
920 if (cmd->start_src == TRIG_NOW) {
921 /* enable this acquisition operation */
922 devpriv->ao_cmd_running = 1;
923 ret = usbduxsigma_submit_urbs(dev, devpriv->ao_urbs,
924 devpriv->n_ao_urbs, 0);
925 if (ret < 0) {
926 devpriv->ao_cmd_running = 0;
927 mutex_unlock(&devpriv->mut);
928 return ret;
929 }
930 s->async->inttrig = NULL;
931 } else { /* TRIG_INT */
932 s->async->inttrig = usbduxsigma_ao_inttrig;
933 }
934
935 mutex_unlock(&devpriv->mut);
936
937 return 0;
938 }
939
940 static int usbduxsigma_dio_insn_config(struct comedi_device *dev,
941 struct comedi_subdevice *s,
942 struct comedi_insn *insn,
943 unsigned int *data)
944 {
945 int ret;
946
947 ret = comedi_dio_insn_config(dev, s, insn, data, 0);
948 if (ret)
949 return ret;
950
951 /*
952 * We don't tell the firmware here as it would take 8 frames
953 * to submit the information. We do it in the (*insn_bits).
954 */
955 return insn->n;
956 }
957
958 static int usbduxsigma_dio_insn_bits(struct comedi_device *dev,
959 struct comedi_subdevice *s,
960 struct comedi_insn *insn,
961 unsigned int *data)
962 {
963 struct usbduxsigma_private *devpriv = dev->private;
964 int ret;
965
966 mutex_lock(&devpriv->mut);
967
968 comedi_dio_update_state(s, data);
969
970 /* Always update the hardware. See the (*insn_config). */
971 devpriv->dux_commands[1] = s->io_bits & 0xff;
972 devpriv->dux_commands[4] = s->state & 0xff;
973 devpriv->dux_commands[2] = (s->io_bits >> 8) & 0xff;
974 devpriv->dux_commands[5] = (s->state >> 8) & 0xff;
975 devpriv->dux_commands[3] = (s->io_bits >> 16) & 0xff;
976 devpriv->dux_commands[6] = (s->state >> 16) & 0xff;
977
978 ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_DIO_BITS_CMD);
979 if (ret < 0)
980 goto done;
981 ret = usbduxsigma_receive_cmd(dev, USBDUXSIGMA_DIO_BITS_CMD);
982 if (ret < 0)
983 goto done;
984
985 s->state = devpriv->insn_buf[1] |
986 (devpriv->insn_buf[2] << 8) |
987 (devpriv->insn_buf[3] << 16);
988
989 data[1] = s->state;
990 ret = insn->n;
991
992 done:
993 mutex_unlock(&devpriv->mut);
994
995 return ret;
996 }
997
998 static void usbduxsigma_pwm_stop(struct comedi_device *dev, int do_unlink)
999 {
1000 struct usbduxsigma_private *devpriv = dev->private;
1001
1002 if (do_unlink) {
1003 if (devpriv->pwm_urb)
1004 usb_kill_urb(devpriv->pwm_urb);
1005 }
1006
1007 devpriv->pwm_cmd_running = 0;
1008 }
1009
1010 static int usbduxsigma_pwm_cancel(struct comedi_device *dev,
1011 struct comedi_subdevice *s)
1012 {
1013 struct usbduxsigma_private *devpriv = dev->private;
1014
1015 /* unlink only if it is really running */
1016 usbduxsigma_pwm_stop(dev, devpriv->pwm_cmd_running);
1017
1018 return usbbuxsigma_send_cmd(dev, USBDUXSIGMA_PWM_OFF_CMD);
1019 }
1020
1021 static void usbduxsigma_pwm_urb_complete(struct urb *urb)
1022 {
1023 struct comedi_device *dev = urb->context;
1024 struct usbduxsigma_private *devpriv = dev->private;
1025 int ret;
1026
1027 switch (urb->status) {
1028 case 0:
1029 /* success */
1030 break;
1031
1032 case -ECONNRESET:
1033 case -ENOENT:
1034 case -ESHUTDOWN:
1035 case -ECONNABORTED:
1036 /* happens after an unlink command */
1037 if (devpriv->pwm_cmd_running)
1038 usbduxsigma_pwm_stop(dev, 0); /* w/o unlink */
1039 return;
1040
1041 default:
1042 /* a real error */
1043 if (devpriv->pwm_cmd_running) {
1044 dev_err(dev->class_dev, "non-zero urb status (%d)\n",
1045 urb->status);
1046 usbduxsigma_pwm_stop(dev, 0); /* w/o unlink */
1047 }
1048 return;
1049 }
1050
1051 if (!devpriv->pwm_cmd_running)
1052 return;
1053
1054 urb->transfer_buffer_length = devpriv->pwm_buf_sz;
1055 urb->dev = comedi_to_usb_dev(dev);
1056 urb->status = 0;
1057 ret = usb_submit_urb(urb, GFP_ATOMIC);
1058 if (ret < 0) {
1059 dev_err(dev->class_dev, "urb resubmit failed (%d)\n", ret);
1060 if (ret == -EL2NSYNC)
1061 dev_err(dev->class_dev,
1062 "buggy USB host controller or bug in IRQ handler\n");
1063 usbduxsigma_pwm_stop(dev, 0); /* w/o unlink */
1064 }
1065 }
1066
1067 static int usbduxsigma_submit_pwm_urb(struct comedi_device *dev)
1068 {
1069 struct usb_device *usb = comedi_to_usb_dev(dev);
1070 struct usbduxsigma_private *devpriv = dev->private;
1071 struct urb *urb = devpriv->pwm_urb;
1072
1073 /* in case of a resubmission after an unlink... */
1074 usb_fill_bulk_urb(urb, usb, usb_sndbulkpipe(usb, 4),
1075 urb->transfer_buffer, devpriv->pwm_buf_sz,
1076 usbduxsigma_pwm_urb_complete, dev);
1077
1078 return usb_submit_urb(urb, GFP_ATOMIC);
1079 }
1080
1081 static int usbduxsigma_pwm_period(struct comedi_device *dev,
1082 struct comedi_subdevice *s,
1083 unsigned int period)
1084 {
1085 struct usbduxsigma_private *devpriv = dev->private;
1086 int fx2delay = 255;
1087
1088 if (period < MIN_PWM_PERIOD)
1089 return -EAGAIN;
1090
1091 fx2delay = (period / (6 * 512 * 1000 / 33)) - 6;
1092 if (fx2delay > 255)
1093 return -EAGAIN;
1094
1095 devpriv->pwm_delay = fx2delay;
1096 devpriv->pwm_period = period;
1097 return 0;
1098 }
1099
1100 static int usbduxsigma_pwm_start(struct comedi_device *dev,
1101 struct comedi_subdevice *s)
1102 {
1103 struct usbduxsigma_private *devpriv = dev->private;
1104 int ret;
1105
1106 if (devpriv->pwm_cmd_running)
1107 return 0;
1108
1109 devpriv->dux_commands[1] = devpriv->pwm_delay;
1110 ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_PWM_ON_CMD);
1111 if (ret < 0)
1112 return ret;
1113
1114 memset(devpriv->pwm_urb->transfer_buffer, 0, devpriv->pwm_buf_sz);
1115
1116 devpriv->pwm_cmd_running = 1;
1117 ret = usbduxsigma_submit_pwm_urb(dev);
1118 if (ret < 0) {
1119 devpriv->pwm_cmd_running = 0;
1120 return ret;
1121 }
1122
1123 return 0;
1124 }
1125
1126 static void usbduxsigma_pwm_pattern(struct comedi_device *dev,
1127 struct comedi_subdevice *s,
1128 unsigned int chan,
1129 unsigned int value,
1130 unsigned int sign)
1131 {
1132 struct usbduxsigma_private *devpriv = dev->private;
1133 char pwm_mask = (1 << chan); /* DIO bit for the PWM data */
1134 char sgn_mask = (16 << chan); /* DIO bit for the sign */
1135 char *buf = (char *)(devpriv->pwm_urb->transfer_buffer);
1136 int szbuf = devpriv->pwm_buf_sz;
1137 int i;
1138
1139 for (i = 0; i < szbuf; i++) {
1140 char c = *buf;
1141
1142 c &= ~pwm_mask;
1143 if (i < value)
1144 c |= pwm_mask;
1145 if (!sign)
1146 c &= ~sgn_mask;
1147 else
1148 c |= sgn_mask;
1149 *buf++ = c;
1150 }
1151 }
1152
1153 static int usbduxsigma_pwm_write(struct comedi_device *dev,
1154 struct comedi_subdevice *s,
1155 struct comedi_insn *insn,
1156 unsigned int *data)
1157 {
1158 unsigned int chan = CR_CHAN(insn->chanspec);
1159
1160 /*
1161 * It doesn't make sense to support more than one value here
1162 * because it would just overwrite the PWM buffer.
1163 */
1164 if (insn->n != 1)
1165 return -EINVAL;
1166
1167 /*
1168 * The sign is set via a special INSN only, this gives us 8 bits
1169 * for normal operation, sign is 0 by default.
1170 */
1171 usbduxsigma_pwm_pattern(dev, s, chan, data[0], 0);
1172
1173 return insn->n;
1174 }
1175
1176 static int usbduxsigma_pwm_config(struct comedi_device *dev,
1177 struct comedi_subdevice *s,
1178 struct comedi_insn *insn,
1179 unsigned int *data)
1180 {
1181 struct usbduxsigma_private *devpriv = dev->private;
1182 unsigned int chan = CR_CHAN(insn->chanspec);
1183
1184 switch (data[0]) {
1185 case INSN_CONFIG_ARM:
1186 /*
1187 * if not zero the PWM is limited to a certain time which is
1188 * not supported here
1189 */
1190 if (data[1] != 0)
1191 return -EINVAL;
1192 return usbduxsigma_pwm_start(dev, s);
1193 case INSN_CONFIG_DISARM:
1194 return usbduxsigma_pwm_cancel(dev, s);
1195 case INSN_CONFIG_GET_PWM_STATUS:
1196 data[1] = devpriv->pwm_cmd_running;
1197 return 0;
1198 case INSN_CONFIG_PWM_SET_PERIOD:
1199 return usbduxsigma_pwm_period(dev, s, data[1]);
1200 case INSN_CONFIG_PWM_GET_PERIOD:
1201 data[1] = devpriv->pwm_period;
1202 return 0;
1203 case INSN_CONFIG_PWM_SET_H_BRIDGE:
1204 /*
1205 * data[1] = value
1206 * data[2] = sign (for a relay)
1207 */
1208 usbduxsigma_pwm_pattern(dev, s, chan, data[1], (data[2] != 0));
1209 return 0;
1210 case INSN_CONFIG_PWM_GET_H_BRIDGE:
1211 /* values are not kept in this driver, nothing to return */
1212 return -EINVAL;
1213 }
1214 return -EINVAL;
1215 }
1216
1217 static int usbduxsigma_getstatusinfo(struct comedi_device *dev, int chan)
1218 {
1219 struct comedi_subdevice *s = dev->read_subdev;
1220 struct usbduxsigma_private *devpriv = dev->private;
1221 u8 sysred;
1222 u32 val;
1223 int ret;
1224
1225 switch (chan) {
1226 default:
1227 case 0:
1228 sysred = 0; /* ADC zero */
1229 break;
1230 case 1:
1231 sysred = 1; /* ADC offset */
1232 break;
1233 case 2:
1234 sysred = 4; /* VCC */
1235 break;
1236 case 3:
1237 sysred = 8; /* temperature */
1238 break;
1239 case 4:
1240 sysred = 16; /* gain */
1241 break;
1242 case 5:
1243 sysred = 32; /* ref */
1244 break;
1245 }
1246
1247 devpriv->dux_commands[1] = 0x12; /* CONFIG0 */
1248 devpriv->dux_commands[2] = 0x80; /* CONFIG1: 2kHz sampling rate */
1249 devpriv->dux_commands[3] = 0x00; /* CONFIG3: diff. channels off */
1250 devpriv->dux_commands[4] = 0;
1251 devpriv->dux_commands[5] = 0;
1252 devpriv->dux_commands[6] = sysred;
1253 ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD);
1254 if (ret < 0)
1255 return ret;
1256
1257 ret = usbduxsigma_receive_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD);
1258 if (ret < 0)
1259 return ret;
1260
1261 /* 32 bits big endian from the A/D converter */
1262 val = be32_to_cpu(get_unaligned((__be32 *)(devpriv->insn_buf + 1)));
1263 val &= 0x00ffffff; /* strip status byte */
1264
1265 return (int)comedi_offset_munge(s, val);
1266 }
1267
1268 static int usbduxsigma_firmware_upload(struct comedi_device *dev,
1269 const u8 *data, size_t size,
1270 unsigned long context)
1271 {
1272 struct usb_device *usb = comedi_to_usb_dev(dev);
1273 u8 *buf;
1274 u8 *tmp;
1275 int ret;
1276
1277 if (!data)
1278 return 0;
1279
1280 if (size > FIRMWARE_MAX_LEN) {
1281 dev_err(dev->class_dev, "firmware binary too large for FX2\n");
1282 return -ENOMEM;
1283 }
1284
1285 /* we generate a local buffer for the firmware */
1286 buf = kmemdup(data, size, GFP_KERNEL);
1287 if (!buf)
1288 return -ENOMEM;
1289
1290 /* we need a malloc'ed buffer for usb_control_msg() */
1291 tmp = kmalloc(1, GFP_KERNEL);
1292 if (!tmp) {
1293 kfree(buf);
1294 return -ENOMEM;
1295 }
1296
1297 /* stop the current firmware on the device */
1298 *tmp = 1; /* 7f92 to one */
1299 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
1300 USBDUXSUB_FIRMWARE,
1301 VENDOR_DIR_OUT,
1302 USBDUXSUB_CPUCS, 0x0000,
1303 tmp, 1,
1304 BULK_TIMEOUT);
1305 if (ret < 0) {
1306 dev_err(dev->class_dev, "can not stop firmware\n");
1307 goto done;
1308 }
1309
1310 /* upload the new firmware to the device */
1311 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
1312 USBDUXSUB_FIRMWARE,
1313 VENDOR_DIR_OUT,
1314 0, 0x0000,
1315 buf, size,
1316 BULK_TIMEOUT);
1317 if (ret < 0) {
1318 dev_err(dev->class_dev, "firmware upload failed\n");
1319 goto done;
1320 }
1321
1322 /* start the new firmware on the device */
1323 *tmp = 0; /* 7f92 to zero */
1324 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
1325 USBDUXSUB_FIRMWARE,
1326 VENDOR_DIR_OUT,
1327 USBDUXSUB_CPUCS, 0x0000,
1328 tmp, 1,
1329 BULK_TIMEOUT);
1330 if (ret < 0)
1331 dev_err(dev->class_dev, "can not start firmware\n");
1332
1333 done:
1334 kfree(tmp);
1335 kfree(buf);
1336 return ret;
1337 }
1338
1339 static int usbduxsigma_alloc_usb_buffers(struct comedi_device *dev)
1340 {
1341 struct usb_device *usb = comedi_to_usb_dev(dev);
1342 struct usbduxsigma_private *devpriv = dev->private;
1343 struct urb *urb;
1344 int i;
1345
1346 devpriv->dux_commands = kzalloc(SIZEOFDUXBUFFER, GFP_KERNEL);
1347 devpriv->in_buf = kzalloc(SIZEINBUF, GFP_KERNEL);
1348 devpriv->insn_buf = kzalloc(SIZEINSNBUF, GFP_KERNEL);
1349 devpriv->ai_urbs = kcalloc(devpriv->n_ai_urbs, sizeof(urb), GFP_KERNEL);
1350 devpriv->ao_urbs = kcalloc(devpriv->n_ao_urbs, sizeof(urb), GFP_KERNEL);
1351 if (!devpriv->dux_commands || !devpriv->in_buf || !devpriv->insn_buf ||
1352 !devpriv->ai_urbs || !devpriv->ao_urbs)
1353 return -ENOMEM;
1354
1355 for (i = 0; i < devpriv->n_ai_urbs; i++) {
1356 /* one frame: 1ms */
1357 urb = usb_alloc_urb(1, GFP_KERNEL);
1358 if (!urb)
1359 return -ENOMEM;
1360 devpriv->ai_urbs[i] = urb;
1361 urb->dev = usb;
1362 /* will be filled later with a pointer to the comedi-device */
1363 /* and ONLY then the urb should be submitted */
1364 urb->context = NULL;
1365 urb->pipe = usb_rcvisocpipe(usb, 6);
1366 urb->transfer_flags = URB_ISO_ASAP;
1367 urb->transfer_buffer = kzalloc(SIZEINBUF, GFP_KERNEL);
1368 if (!urb->transfer_buffer)
1369 return -ENOMEM;
1370 urb->complete = usbduxsigma_ai_urb_complete;
1371 urb->number_of_packets = 1;
1372 urb->transfer_buffer_length = SIZEINBUF;
1373 urb->iso_frame_desc[0].offset = 0;
1374 urb->iso_frame_desc[0].length = SIZEINBUF;
1375 }
1376
1377 for (i = 0; i < devpriv->n_ao_urbs; i++) {
1378 /* one frame: 1ms */
1379 urb = usb_alloc_urb(1, GFP_KERNEL);
1380 if (!urb)
1381 return -ENOMEM;
1382 devpriv->ao_urbs[i] = urb;
1383 urb->dev = usb;
1384 /* will be filled later with a pointer to the comedi-device */
1385 /* and ONLY then the urb should be submitted */
1386 urb->context = NULL;
1387 urb->pipe = usb_sndisocpipe(usb, 2);
1388 urb->transfer_flags = URB_ISO_ASAP;
1389 urb->transfer_buffer = kzalloc(SIZEOUTBUF, GFP_KERNEL);
1390 if (!urb->transfer_buffer)
1391 return -ENOMEM;
1392 urb->complete = usbduxsigma_ao_urb_complete;
1393 urb->number_of_packets = 1;
1394 urb->transfer_buffer_length = SIZEOUTBUF;
1395 urb->iso_frame_desc[0].offset = 0;
1396 urb->iso_frame_desc[0].length = SIZEOUTBUF;
1397 urb->interval = 1; /* (u)frames */
1398 }
1399
1400 if (devpriv->pwm_buf_sz) {
1401 urb = usb_alloc_urb(0, GFP_KERNEL);
1402 if (!urb)
1403 return -ENOMEM;
1404 devpriv->pwm_urb = urb;
1405
1406 urb->transfer_buffer = kzalloc(devpriv->pwm_buf_sz,
1407 GFP_KERNEL);
1408 if (!urb->transfer_buffer)
1409 return -ENOMEM;
1410 }
1411
1412 return 0;
1413 }
1414
1415 static void usbduxsigma_free_usb_buffers(struct comedi_device *dev)
1416 {
1417 struct usbduxsigma_private *devpriv = dev->private;
1418 struct urb *urb;
1419 int i;
1420
1421 urb = devpriv->pwm_urb;
1422 if (urb) {
1423 kfree(urb->transfer_buffer);
1424 usb_free_urb(urb);
1425 }
1426 if (devpriv->ao_urbs) {
1427 for (i = 0; i < devpriv->n_ao_urbs; i++) {
1428 urb = devpriv->ao_urbs[i];
1429 if (urb) {
1430 kfree(urb->transfer_buffer);
1431 usb_free_urb(urb);
1432 }
1433 }
1434 kfree(devpriv->ao_urbs);
1435 }
1436 if (devpriv->ai_urbs) {
1437 for (i = 0; i < devpriv->n_ai_urbs; i++) {
1438 urb = devpriv->ai_urbs[i];
1439 if (urb) {
1440 kfree(urb->transfer_buffer);
1441 usb_free_urb(urb);
1442 }
1443 }
1444 kfree(devpriv->ai_urbs);
1445 }
1446 kfree(devpriv->insn_buf);
1447 kfree(devpriv->in_buf);
1448 kfree(devpriv->dux_commands);
1449 }
1450
1451 static int usbduxsigma_auto_attach(struct comedi_device *dev,
1452 unsigned long context_unused)
1453 {
1454 struct usb_interface *intf = comedi_to_usb_interface(dev);
1455 struct usb_device *usb = comedi_to_usb_dev(dev);
1456 struct usbduxsigma_private *devpriv;
1457 struct comedi_subdevice *s;
1458 int offset;
1459 int ret;
1460
1461 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
1462 if (!devpriv)
1463 return -ENOMEM;
1464
1465 mutex_init(&devpriv->mut);
1466
1467 usb_set_intfdata(intf, devpriv);
1468
1469 devpriv->high_speed = (usb->speed == USB_SPEED_HIGH);
1470 if (devpriv->high_speed) {
1471 devpriv->n_ai_urbs = NUMOFINBUFFERSHIGH;
1472 devpriv->n_ao_urbs = NUMOFOUTBUFFERSHIGH;
1473 devpriv->pwm_buf_sz = 512;
1474 } else {
1475 devpriv->n_ai_urbs = NUMOFINBUFFERSFULL;
1476 devpriv->n_ao_urbs = NUMOFOUTBUFFERSFULL;
1477 }
1478
1479 ret = usbduxsigma_alloc_usb_buffers(dev);
1480 if (ret)
1481 return ret;
1482
1483 /* setting to alternate setting 3: enabling iso ep and bulk ep. */
1484 ret = usb_set_interface(usb, intf->altsetting->desc.bInterfaceNumber,
1485 3);
1486 if (ret < 0) {
1487 dev_err(dev->class_dev,
1488 "could not set alternate setting 3 in high speed\n");
1489 return ret;
1490 }
1491
1492 ret = comedi_load_firmware(dev, &usb->dev, FIRMWARE,
1493 usbduxsigma_firmware_upload, 0);
1494 if (ret)
1495 return ret;
1496
1497 ret = comedi_alloc_subdevices(dev, (devpriv->high_speed) ? 4 : 3);
1498 if (ret)
1499 return ret;
1500
1501 /* Analog Input subdevice */
1502 s = &dev->subdevices[0];
1503 dev->read_subdev = s;
1504 s->type = COMEDI_SUBD_AI;
1505 s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ | SDF_LSAMPL;
1506 s->n_chan = NUMCHANNELS;
1507 s->len_chanlist = NUMCHANNELS;
1508 s->maxdata = 0x00ffffff;
1509 s->range_table = &usbduxsigma_ai_range;
1510 s->insn_read = usbduxsigma_ai_insn_read;
1511 s->do_cmdtest = usbduxsigma_ai_cmdtest;
1512 s->do_cmd = usbduxsigma_ai_cmd;
1513 s->cancel = usbduxsigma_ai_cancel;
1514
1515 /* Analog Output subdevice */
1516 s = &dev->subdevices[1];
1517 dev->write_subdev = s;
1518 s->type = COMEDI_SUBD_AO;
1519 s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_CMD_WRITE;
1520 s->n_chan = 4;
1521 s->len_chanlist = s->n_chan;
1522 s->maxdata = 0x00ff;
1523 s->range_table = &range_unipolar2_5;
1524 s->insn_write = usbduxsigma_ao_insn_write;
1525 s->insn_read = usbduxsigma_ao_insn_read;
1526 s->do_cmdtest = usbduxsigma_ao_cmdtest;
1527 s->do_cmd = usbduxsigma_ao_cmd;
1528 s->cancel = usbduxsigma_ao_cancel;
1529
1530 ret = comedi_alloc_subdev_readback(s);
1531 if (ret)
1532 return ret;
1533
1534 /* Digital I/O subdevice */
1535 s = &dev->subdevices[2];
1536 s->type = COMEDI_SUBD_DIO;
1537 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
1538 s->n_chan = 24;
1539 s->maxdata = 1;
1540 s->range_table = &range_digital;
1541 s->insn_bits = usbduxsigma_dio_insn_bits;
1542 s->insn_config = usbduxsigma_dio_insn_config;
1543
1544 if (devpriv->high_speed) {
1545 /* Timer / pwm subdevice */
1546 s = &dev->subdevices[3];
1547 s->type = COMEDI_SUBD_PWM;
1548 s->subdev_flags = SDF_WRITABLE | SDF_PWM_HBRIDGE;
1549 s->n_chan = 8;
1550 s->maxdata = devpriv->pwm_buf_sz;
1551 s->insn_write = usbduxsigma_pwm_write;
1552 s->insn_config = usbduxsigma_pwm_config;
1553
1554 usbduxsigma_pwm_period(dev, s, PWM_DEFAULT_PERIOD);
1555 }
1556
1557 offset = usbduxsigma_getstatusinfo(dev, 0);
1558 if (offset < 0) {
1559 dev_err(dev->class_dev,
1560 "Communication to USBDUXSIGMA failed! Check firmware and cabling.\n");
1561 return offset;
1562 }
1563
1564 dev_info(dev->class_dev, "ADC_zero = %x\n", offset);
1565
1566 return 0;
1567 }
1568
1569 static void usbduxsigma_detach(struct comedi_device *dev)
1570 {
1571 struct usb_interface *intf = comedi_to_usb_interface(dev);
1572 struct usbduxsigma_private *devpriv = dev->private;
1573
1574 usb_set_intfdata(intf, NULL);
1575
1576 if (!devpriv)
1577 return;
1578
1579 mutex_lock(&devpriv->mut);
1580
1581 /* force unlink all urbs */
1582 usbduxsigma_ai_stop(dev, 1);
1583 usbduxsigma_ao_stop(dev, 1);
1584 usbduxsigma_pwm_stop(dev, 1);
1585
1586 usbduxsigma_free_usb_buffers(dev);
1587
1588 mutex_unlock(&devpriv->mut);
1589 }
1590
1591 static struct comedi_driver usbduxsigma_driver = {
1592 .driver_name = "usbduxsigma",
1593 .module = THIS_MODULE,
1594 .auto_attach = usbduxsigma_auto_attach,
1595 .detach = usbduxsigma_detach,
1596 };
1597
1598 static int usbduxsigma_usb_probe(struct usb_interface *intf,
1599 const struct usb_device_id *id)
1600 {
1601 return comedi_usb_auto_config(intf, &usbduxsigma_driver, 0);
1602 }
1603
1604 static const struct usb_device_id usbduxsigma_usb_table[] = {
1605 { USB_DEVICE(0x13d8, 0x0020) },
1606 { USB_DEVICE(0x13d8, 0x0021) },
1607 { USB_DEVICE(0x13d8, 0x0022) },
1608 { }
1609 };
1610 MODULE_DEVICE_TABLE(usb, usbduxsigma_usb_table);
1611
1612 static struct usb_driver usbduxsigma_usb_driver = {
1613 .name = "usbduxsigma",
1614 .probe = usbduxsigma_usb_probe,
1615 .disconnect = comedi_usb_auto_unconfig,
1616 .id_table = usbduxsigma_usb_table,
1617 };
1618 module_comedi_usb_driver(usbduxsigma_driver, usbduxsigma_usb_driver);
1619
1620 MODULE_AUTHOR("Bernd Porr, mail@berndporr.me.uk");
1621 MODULE_DESCRIPTION("Stirling/ITL USB-DUX SIGMA -- mail@berndporr.me.uk");
1622 MODULE_LICENSE("GPL");
1623 MODULE_FIRMWARE(FIRMWARE);
Linux kernel - Deliverables
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