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staging: comedi: usbduxsigma: don't clobber ao_timer in command test
[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(uint32_t)))
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(uint8_t)+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 uint8_t 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 uint8_t *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 uint8_t *dux_commands;
176 struct semaphore sem;
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 down(&devpriv->sem);
203 /* unlink only if it is really running */
204 usbduxsigma_ai_stop(dev, devpriv->ai_cmd_running);
205 up(&devpriv->sem);
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 uint32_t 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 /* get the data from the USB bus
227 and hand it over to comedi */
228 for (i = 0; i < cmd->chanlist_len; i++) {
229 /* transfer data,
230 note first byte is the DIO state */
231 val = be32_to_cpu(devpriv->in_buf[i+1]);
232 val &= 0x00ffffff; /* strip status byte */
233 val ^= 0x00800000; /* convert to unsigned */
234
235 if (!comedi_buf_write_samples(s, &val, 1))
236 return;
237 }
238
239 if (cmd->stop_src == TRIG_COUNT &&
240 async->scans_done >= cmd->stop_arg)
241 async->events |= COMEDI_CB_EOA;
242 }
243 }
244
245 /* if command is still running, resubmit urb */
246 if (!(async->events & COMEDI_CB_CANCEL_MASK)) {
247 urb->dev = comedi_to_usb_dev(dev);
248 ret = usb_submit_urb(urb, GFP_ATOMIC);
249 if (ret < 0) {
250 dev_err(dev->class_dev, "urb resubmit failed (%d)\n",
251 ret);
252 if (ret == -EL2NSYNC)
253 dev_err(dev->class_dev,
254 "buggy USB host controller or bug in IRQ handler\n");
255 async->events |= COMEDI_CB_ERROR;
256 }
257 }
258 }
259
260 static void usbduxsigma_ai_urb_complete(struct urb *urb)
261 {
262 struct comedi_device *dev = urb->context;
263 struct usbduxsigma_private *devpriv = dev->private;
264 struct comedi_subdevice *s = dev->read_subdev;
265 struct comedi_async *async = s->async;
266
267 /* exit if not running a command, do not resubmit urb */
268 if (!devpriv->ai_cmd_running)
269 return;
270
271 switch (urb->status) {
272 case 0:
273 /* copy the result in the transfer buffer */
274 memcpy(devpriv->in_buf, urb->transfer_buffer, SIZEINBUF);
275 usbduxsigma_ai_handle_urb(dev, s, urb);
276 break;
277
278 case -EILSEQ:
279 /*
280 * error in the ISOchronous data
281 * we don't copy the data into the transfer buffer
282 * and recycle the last data byte
283 */
284 dev_dbg(dev->class_dev, "CRC error in ISO IN stream\n");
285 usbduxsigma_ai_handle_urb(dev, s, urb);
286 break;
287
288 case -ECONNRESET:
289 case -ENOENT:
290 case -ESHUTDOWN:
291 case -ECONNABORTED:
292 /* happens after an unlink command */
293 async->events |= COMEDI_CB_ERROR;
294 break;
295
296 default:
297 /* a real error */
298 dev_err(dev->class_dev, "non-zero urb status (%d)\n",
299 urb->status);
300 async->events |= COMEDI_CB_ERROR;
301 break;
302 }
303
304 /*
305 * comedi_handle_events() cannot be used in this driver. The (*cancel)
306 * operation would unlink the urb.
307 */
308 if (async->events & COMEDI_CB_CANCEL_MASK)
309 usbduxsigma_ai_stop(dev, 0);
310
311 comedi_event(dev, s);
312 }
313
314 static void usbduxsigma_ao_stop(struct comedi_device *dev, int do_unlink)
315 {
316 struct usbduxsigma_private *devpriv = dev->private;
317
318 if (do_unlink && devpriv->ao_urbs)
319 usbduxsigma_unlink_urbs(devpriv->ao_urbs, devpriv->n_ao_urbs);
320
321 devpriv->ao_cmd_running = 0;
322 }
323
324 static int usbduxsigma_ao_cancel(struct comedi_device *dev,
325 struct comedi_subdevice *s)
326 {
327 struct usbduxsigma_private *devpriv = dev->private;
328
329 down(&devpriv->sem);
330 /* unlink only if it is really running */
331 usbduxsigma_ao_stop(dev, devpriv->ao_cmd_running);
332 up(&devpriv->sem);
333
334 return 0;
335 }
336
337 static void usbduxsigma_ao_handle_urb(struct comedi_device *dev,
338 struct comedi_subdevice *s,
339 struct urb *urb)
340 {
341 struct usbduxsigma_private *devpriv = dev->private;
342 struct comedi_async *async = s->async;
343 struct comedi_cmd *cmd = &async->cmd;
344 uint8_t *datap;
345 int ret;
346 int i;
347
348 devpriv->ao_counter--;
349 if (devpriv->ao_counter == 0) {
350 devpriv->ao_counter = devpriv->ao_timer;
351
352 if (cmd->stop_src == TRIG_COUNT &&
353 async->scans_done >= cmd->stop_arg) {
354 async->events |= COMEDI_CB_EOA;
355 return;
356 }
357
358 /* transmit data to the USB bus */
359 datap = urb->transfer_buffer;
360 *datap++ = cmd->chanlist_len;
361 for (i = 0; i < cmd->chanlist_len; i++) {
362 unsigned int chan = CR_CHAN(cmd->chanlist[i]);
363 unsigned short val;
364
365 if (!comedi_buf_read_samples(s, &val, 1)) {
366 dev_err(dev->class_dev, "buffer underflow\n");
367 async->events |= COMEDI_CB_OVERFLOW;
368 return;
369 }
370
371 *datap++ = val;
372 *datap++ = chan;
373 s->readback[chan] = val;
374 }
375 }
376
377 /* if command is still running, resubmit urb */
378 if (!(async->events & COMEDI_CB_CANCEL_MASK)) {
379 urb->transfer_buffer_length = SIZEOUTBUF;
380 urb->dev = comedi_to_usb_dev(dev);
381 urb->status = 0;
382 urb->interval = 1; /* (u)frames */
383 urb->number_of_packets = 1;
384 urb->iso_frame_desc[0].offset = 0;
385 urb->iso_frame_desc[0].length = SIZEOUTBUF;
386 urb->iso_frame_desc[0].status = 0;
387 ret = usb_submit_urb(urb, GFP_ATOMIC);
388 if (ret < 0) {
389 dev_err(dev->class_dev, "urb resubmit failed (%d)\n",
390 ret);
391 if (ret == -EL2NSYNC)
392 dev_err(dev->class_dev,
393 "buggy USB host controller or bug in IRQ handler\n");
394 async->events |= COMEDI_CB_ERROR;
395 }
396 }
397 }
398
399 static void usbduxsigma_ao_urb_complete(struct urb *urb)
400 {
401 struct comedi_device *dev = urb->context;
402 struct usbduxsigma_private *devpriv = dev->private;
403 struct comedi_subdevice *s = dev->write_subdev;
404 struct comedi_async *async = s->async;
405
406 /* exit if not running a command, do not resubmit urb */
407 if (!devpriv->ao_cmd_running)
408 return;
409
410 switch (urb->status) {
411 case 0:
412 usbduxsigma_ao_handle_urb(dev, s, urb);
413 break;
414
415 case -ECONNRESET:
416 case -ENOENT:
417 case -ESHUTDOWN:
418 case -ECONNABORTED:
419 /* happens after an unlink command */
420 async->events |= COMEDI_CB_ERROR;
421 break;
422
423 default:
424 /* a real error */
425 dev_err(dev->class_dev, "non-zero urb status (%d)\n",
426 urb->status);
427 async->events |= COMEDI_CB_ERROR;
428 break;
429 }
430
431 /*
432 * comedi_handle_events() cannot be used in this driver. The (*cancel)
433 * operation would unlink the urb.
434 */
435 if (async->events & COMEDI_CB_CANCEL_MASK)
436 usbduxsigma_ao_stop(dev, 0);
437
438 comedi_event(dev, s);
439 }
440
441 static int usbduxsigma_submit_urbs(struct comedi_device *dev,
442 struct urb **urbs, int num_urbs,
443 int input_urb)
444 {
445 struct usb_device *usb = comedi_to_usb_dev(dev);
446 struct urb *urb;
447 int ret;
448 int i;
449
450 /* Submit all URBs and start the transfer on the bus */
451 for (i = 0; i < num_urbs; i++) {
452 urb = urbs[i];
453
454 /* in case of a resubmission after an unlink... */
455 if (input_urb)
456 urb->interval = 1;
457 urb->context = dev;
458 urb->dev = usb;
459 urb->status = 0;
460 urb->transfer_flags = URB_ISO_ASAP;
461
462 ret = usb_submit_urb(urb, GFP_ATOMIC);
463 if (ret)
464 return ret;
465 }
466 return 0;
467 }
468
469 static int usbduxsigma_chans_to_interval(int num_chan)
470 {
471 if (num_chan <= 2)
472 return 2; /* 4kHz */
473 if (num_chan <= 8)
474 return 4; /* 2kHz */
475 return 8; /* 1kHz */
476 }
477
478 static int usbduxsigma_ai_cmdtest(struct comedi_device *dev,
479 struct comedi_subdevice *s,
480 struct comedi_cmd *cmd)
481 {
482 struct usbduxsigma_private *devpriv = dev->private;
483 int high_speed = devpriv->high_speed;
484 int interval = usbduxsigma_chans_to_interval(cmd->chanlist_len);
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 (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */
513 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
514
515 if (cmd->scan_begin_src == TRIG_TIMER) {
516 unsigned int tmp;
517
518 if (high_speed) {
519 /*
520 * In high speed mode microframes are possible.
521 * However, during one microframe we can roughly
522 * sample two channels. Thus, the more channels
523 * are in the channel list the more time we need.
524 */
525 err |= comedi_check_trigger_arg_min(&cmd->
526 scan_begin_arg,
527 (1000000 / 8 *
528 interval));
529
530 tmp = (cmd->scan_begin_arg / 125000) * 125000;
531 } else {
532 /* full speed */
533 /* 1kHz scans every USB frame */
534 err |= comedi_check_trigger_arg_min(&cmd->
535 scan_begin_arg,
536 1000000);
537
538 tmp = (cmd->scan_begin_arg / 1000000) * 1000000;
539 }
540 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, tmp);
541 }
542
543 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
544 cmd->chanlist_len);
545
546 if (cmd->stop_src == TRIG_COUNT)
547 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
548 else /* TRIG_NONE */
549 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
550
551 if (err)
552 return 3;
553
554 return 0;
555 }
556
557 /*
558 * creates the ADC command for the MAX1271
559 * range is the range value from comedi
560 */
561 static void create_adc_command(unsigned int chan,
562 uint8_t *muxsg0,
563 uint8_t *muxsg1)
564 {
565 if (chan < 8)
566 (*muxsg0) = (*muxsg0) | (1 << chan);
567 else if (chan < 16)
568 (*muxsg1) = (*muxsg1) | (1 << (chan-8));
569 }
570
571 static int usbbuxsigma_send_cmd(struct comedi_device *dev, int cmd_type)
572 {
573 struct usb_device *usb = comedi_to_usb_dev(dev);
574 struct usbduxsigma_private *devpriv = dev->private;
575 int nsent;
576
577 devpriv->dux_commands[0] = cmd_type;
578
579 return usb_bulk_msg(usb, usb_sndbulkpipe(usb, 1),
580 devpriv->dux_commands, SIZEOFDUXBUFFER,
581 &nsent, BULK_TIMEOUT);
582 }
583
584 static int usbduxsigma_receive_cmd(struct comedi_device *dev, int command)
585 {
586 struct usb_device *usb = comedi_to_usb_dev(dev);
587 struct usbduxsigma_private *devpriv = dev->private;
588 int nrec;
589 int ret;
590 int i;
591
592 for (i = 0; i < RETRIES; i++) {
593 ret = usb_bulk_msg(usb, usb_rcvbulkpipe(usb, 8),
594 devpriv->insn_buf, SIZEINSNBUF,
595 &nrec, BULK_TIMEOUT);
596 if (ret < 0)
597 return ret;
598
599 if (devpriv->insn_buf[0] == command)
600 return 0;
601 }
602 /*
603 * This is only reached if the data has been requested a
604 * couple of times and the command was not received.
605 */
606 return -EFAULT;
607 }
608
609 static int usbduxsigma_ai_inttrig(struct comedi_device *dev,
610 struct comedi_subdevice *s,
611 unsigned int trig_num)
612 {
613 struct usbduxsigma_private *devpriv = dev->private;
614 struct comedi_cmd *cmd = &s->async->cmd;
615 int ret;
616
617 if (trig_num != cmd->start_arg)
618 return -EINVAL;
619
620 down(&devpriv->sem);
621 if (!devpriv->ai_cmd_running) {
622 devpriv->ai_cmd_running = 1;
623 ret = usbduxsigma_submit_urbs(dev, devpriv->ai_urbs,
624 devpriv->n_ai_urbs, 1);
625 if (ret < 0) {
626 devpriv->ai_cmd_running = 0;
627 up(&devpriv->sem);
628 return ret;
629 }
630 s->async->inttrig = NULL;
631 }
632 up(&devpriv->sem);
633
634 return 1;
635 }
636
637 static int usbduxsigma_ai_cmd(struct comedi_device *dev,
638 struct comedi_subdevice *s)
639 {
640 struct usbduxsigma_private *devpriv = dev->private;
641 struct comedi_cmd *cmd = &s->async->cmd;
642 unsigned int len = cmd->chanlist_len;
643 uint8_t muxsg0 = 0;
644 uint8_t muxsg1 = 0;
645 uint8_t sysred = 0;
646 int ret;
647 int i;
648
649 down(&devpriv->sem);
650
651 if (devpriv->high_speed) {
652 /*
653 * every 2 channels get a time window of 125us. Thus, if we
654 * sample all 16 channels we need 1ms. If we sample only one
655 * channel we need only 125us
656 */
657 unsigned int interval = usbduxsigma_chans_to_interval(len);
658
659 devpriv->ai_interval = interval;
660 devpriv->ai_timer = cmd->scan_begin_arg / (125000 * interval);
661 } else {
662 /* interval always 1ms */
663 devpriv->ai_interval = 1;
664 devpriv->ai_timer = cmd->scan_begin_arg / 1000000;
665 }
666
667 for (i = 0; i < len; i++) {
668 unsigned int chan = CR_CHAN(cmd->chanlist[i]);
669
670 create_adc_command(chan, &muxsg0, &muxsg1);
671 }
672
673 devpriv->dux_commands[1] = devpriv->ai_interval;
674 devpriv->dux_commands[2] = len; /* num channels per time step */
675 devpriv->dux_commands[3] = 0x12; /* CONFIG0 */
676 devpriv->dux_commands[4] = 0x03; /* CONFIG1: 23kHz sample, delay 0us */
677 devpriv->dux_commands[5] = 0x00; /* CONFIG3: diff. channels off */
678 devpriv->dux_commands[6] = muxsg0;
679 devpriv->dux_commands[7] = muxsg1;
680 devpriv->dux_commands[8] = sysred;
681
682 ret = usbbuxsigma_send_cmd(dev, USBBUXSIGMA_AD_CMD);
683 if (ret < 0) {
684 up(&devpriv->sem);
685 return ret;
686 }
687
688 devpriv->ai_counter = devpriv->ai_timer;
689
690 if (cmd->start_src == TRIG_NOW) {
691 /* enable this acquisition operation */
692 devpriv->ai_cmd_running = 1;
693 ret = usbduxsigma_submit_urbs(dev, devpriv->ai_urbs,
694 devpriv->n_ai_urbs, 1);
695 if (ret < 0) {
696 devpriv->ai_cmd_running = 0;
697 up(&devpriv->sem);
698 return ret;
699 }
700 s->async->inttrig = NULL;
701 } else { /* TRIG_INT */
702 s->async->inttrig = usbduxsigma_ai_inttrig;
703 }
704
705 up(&devpriv->sem);
706
707 return 0;
708 }
709
710 static int usbduxsigma_ai_insn_read(struct comedi_device *dev,
711 struct comedi_subdevice *s,
712 struct comedi_insn *insn,
713 unsigned int *data)
714 {
715 struct usbduxsigma_private *devpriv = dev->private;
716 unsigned int chan = CR_CHAN(insn->chanspec);
717 uint8_t muxsg0 = 0;
718 uint8_t muxsg1 = 0;
719 uint8_t sysred = 0;
720 int ret;
721 int i;
722
723 down(&devpriv->sem);
724 if (devpriv->ai_cmd_running) {
725 up(&devpriv->sem);
726 return -EBUSY;
727 }
728
729 create_adc_command(chan, &muxsg0, &muxsg1);
730
731 /* Mode 0 is used to get a single conversion on demand */
732 devpriv->dux_commands[1] = 0x16; /* CONFIG0: chopper on */
733 devpriv->dux_commands[2] = 0x80; /* CONFIG1: 2kHz sampling rate */
734 devpriv->dux_commands[3] = 0x00; /* CONFIG3: diff. channels off */
735 devpriv->dux_commands[4] = muxsg0;
736 devpriv->dux_commands[5] = muxsg1;
737 devpriv->dux_commands[6] = sysred;
738
739 /* adc commands */
740 ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD);
741 if (ret < 0) {
742 up(&devpriv->sem);
743 return ret;
744 }
745
746 for (i = 0; i < insn->n; i++) {
747 uint32_t val;
748
749 ret = usbduxsigma_receive_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD);
750 if (ret < 0) {
751 up(&devpriv->sem);
752 return ret;
753 }
754
755 /* 32 bits big endian from the A/D converter */
756 val = be32_to_cpu(get_unaligned((__be32
757 *)(devpriv->insn_buf + 1)));
758 val &= 0x00ffffff; /* strip status byte */
759 val ^= 0x00800000; /* convert to unsigned */
760
761 data[i] = val;
762 }
763 up(&devpriv->sem);
764
765 return insn->n;
766 }
767
768 static int usbduxsigma_ao_insn_read(struct comedi_device *dev,
769 struct comedi_subdevice *s,
770 struct comedi_insn *insn,
771 unsigned int *data)
772 {
773 struct usbduxsigma_private *devpriv = dev->private;
774 int ret;
775
776 down(&devpriv->sem);
777 ret = comedi_readback_insn_read(dev, s, insn, data);
778 up(&devpriv->sem);
779
780 return ret;
781 }
782
783 static int usbduxsigma_ao_insn_write(struct comedi_device *dev,
784 struct comedi_subdevice *s,
785 struct comedi_insn *insn,
786 unsigned int *data)
787 {
788 struct usbduxsigma_private *devpriv = dev->private;
789 unsigned int chan = CR_CHAN(insn->chanspec);
790 int ret;
791 int i;
792
793 down(&devpriv->sem);
794 if (devpriv->ao_cmd_running) {
795 up(&devpriv->sem);
796 return -EBUSY;
797 }
798
799 for (i = 0; i < insn->n; i++) {
800 devpriv->dux_commands[1] = 1; /* num channels */
801 devpriv->dux_commands[2] = data[i]; /* value */
802 devpriv->dux_commands[3] = chan; /* channel number */
803 ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_DA_CMD);
804 if (ret < 0) {
805 up(&devpriv->sem);
806 return ret;
807 }
808 s->readback[chan] = data[i];
809 }
810 up(&devpriv->sem);
811
812 return insn->n;
813 }
814
815 static int usbduxsigma_ao_inttrig(struct comedi_device *dev,
816 struct comedi_subdevice *s,
817 unsigned int trig_num)
818 {
819 struct usbduxsigma_private *devpriv = dev->private;
820 struct comedi_cmd *cmd = &s->async->cmd;
821 int ret;
822
823 if (trig_num != cmd->start_arg)
824 return -EINVAL;
825
826 down(&devpriv->sem);
827 if (!devpriv->ao_cmd_running) {
828 devpriv->ao_cmd_running = 1;
829 ret = usbduxsigma_submit_urbs(dev, devpriv->ao_urbs,
830 devpriv->n_ao_urbs, 0);
831 if (ret < 0) {
832 devpriv->ao_cmd_running = 0;
833 up(&devpriv->sem);
834 return ret;
835 }
836 s->async->inttrig = NULL;
837 }
838 up(&devpriv->sem);
839
840 return 1;
841 }
842
843 static int usbduxsigma_ao_cmdtest(struct comedi_device *dev,
844 struct comedi_subdevice *s,
845 struct comedi_cmd *cmd)
846 {
847 struct usbduxsigma_private *devpriv = dev->private;
848 int err = 0;
849 int high_speed;
850 unsigned int flags;
851
852 /* high speed conversions are not used yet */
853 high_speed = 0; /* (devpriv->high_speed) */
854
855 /* Step 1 : check if triggers are trivially valid */
856
857 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
858
859 if (high_speed) {
860 /*
861 * start immediately a new scan
862 * the sampling rate is set by the coversion rate
863 */
864 flags = TRIG_FOLLOW;
865 } else {
866 /* start a new scan (output at once) with a timer */
867 flags = TRIG_TIMER;
868 }
869 err |= comedi_check_trigger_src(&cmd->scan_begin_src, flags);
870
871 err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW);
872 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
873 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
874
875 if (err) {
876 up(&devpriv->sem);
877 return 1;
878 }
879
880 /* Step 2a : make sure trigger sources are unique */
881
882 err |= comedi_check_trigger_is_unique(cmd->start_src);
883 err |= comedi_check_trigger_is_unique(cmd->stop_src);
884
885 /* Step 2b : and mutually compatible */
886
887 if (err)
888 return 2;
889
890 /* Step 3: check if arguments are trivially valid */
891
892 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
893
894 if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */
895 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
896
897 if (cmd->scan_begin_src == TRIG_TIMER) {
898 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
899 1000000);
900 }
901
902 /* not used now, is for later use */
903 if (cmd->convert_src == TRIG_TIMER)
904 err |= comedi_check_trigger_arg_min(&cmd->convert_arg, 125000);
905
906 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
907 cmd->chanlist_len);
908
909 if (cmd->stop_src == TRIG_COUNT)
910 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
911 else /* TRIG_NONE */
912 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
913
914 if (err)
915 return 3;
916
917 return 0;
918 }
919
920 static int usbduxsigma_ao_cmd(struct comedi_device *dev,
921 struct comedi_subdevice *s)
922 {
923 struct usbduxsigma_private *devpriv = dev->private;
924 struct comedi_cmd *cmd = &s->async->cmd;
925 int ret;
926
927 down(&devpriv->sem);
928
929 if (cmd->convert_src == TRIG_TIMER) {
930 /*
931 * timing of the conversion itself: every 125 us
932 * at high speed (not used yet)
933 */
934 devpriv->ao_timer = cmd->convert_arg / 125000;
935 } else {
936 /*
937 * timing of the scan: every 1ms
938 * we get all channels at once
939 */
940 devpriv->ao_timer = cmd->scan_begin_arg / 1000000;
941 }
942
943 devpriv->ao_counter = devpriv->ao_timer;
944
945 if (cmd->start_src == TRIG_NOW) {
946 /* enable this acquisition operation */
947 devpriv->ao_cmd_running = 1;
948 ret = usbduxsigma_submit_urbs(dev, devpriv->ao_urbs,
949 devpriv->n_ao_urbs, 0);
950 if (ret < 0) {
951 devpriv->ao_cmd_running = 0;
952 up(&devpriv->sem);
953 return ret;
954 }
955 s->async->inttrig = NULL;
956 } else { /* TRIG_INT */
957 s->async->inttrig = usbduxsigma_ao_inttrig;
958 }
959
960 up(&devpriv->sem);
961
962 return 0;
963 }
964
965 static int usbduxsigma_dio_insn_config(struct comedi_device *dev,
966 struct comedi_subdevice *s,
967 struct comedi_insn *insn,
968 unsigned int *data)
969 {
970 int ret;
971
972 ret = comedi_dio_insn_config(dev, s, insn, data, 0);
973 if (ret)
974 return ret;
975
976 /*
977 * We don't tell the firmware here as it would take 8 frames
978 * to submit the information. We do it in the (*insn_bits).
979 */
980 return insn->n;
981 }
982
983 static int usbduxsigma_dio_insn_bits(struct comedi_device *dev,
984 struct comedi_subdevice *s,
985 struct comedi_insn *insn,
986 unsigned int *data)
987 {
988 struct usbduxsigma_private *devpriv = dev->private;
989 int ret;
990
991 down(&devpriv->sem);
992
993 comedi_dio_update_state(s, data);
994
995 /* Always update the hardware. See the (*insn_config). */
996 devpriv->dux_commands[1] = s->io_bits & 0xff;
997 devpriv->dux_commands[4] = s->state & 0xff;
998 devpriv->dux_commands[2] = (s->io_bits >> 8) & 0xff;
999 devpriv->dux_commands[5] = (s->state >> 8) & 0xff;
1000 devpriv->dux_commands[3] = (s->io_bits >> 16) & 0xff;
1001 devpriv->dux_commands[6] = (s->state >> 16) & 0xff;
1002
1003 ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_DIO_BITS_CMD);
1004 if (ret < 0)
1005 goto done;
1006 ret = usbduxsigma_receive_cmd(dev, USBDUXSIGMA_DIO_BITS_CMD);
1007 if (ret < 0)
1008 goto done;
1009
1010 s->state = devpriv->insn_buf[1] |
1011 (devpriv->insn_buf[2] << 8) |
1012 (devpriv->insn_buf[3] << 16);
1013
1014 data[1] = s->state;
1015 ret = insn->n;
1016
1017 done:
1018 up(&devpriv->sem);
1019
1020 return ret;
1021 }
1022
1023 static void usbduxsigma_pwm_stop(struct comedi_device *dev, int do_unlink)
1024 {
1025 struct usbduxsigma_private *devpriv = dev->private;
1026
1027 if (do_unlink) {
1028 if (devpriv->pwm_urb)
1029 usb_kill_urb(devpriv->pwm_urb);
1030 }
1031
1032 devpriv->pwm_cmd_running = 0;
1033 }
1034
1035 static int usbduxsigma_pwm_cancel(struct comedi_device *dev,
1036 struct comedi_subdevice *s)
1037 {
1038 struct usbduxsigma_private *devpriv = dev->private;
1039
1040 /* unlink only if it is really running */
1041 usbduxsigma_pwm_stop(dev, devpriv->pwm_cmd_running);
1042
1043 return usbbuxsigma_send_cmd(dev, USBDUXSIGMA_PWM_OFF_CMD);
1044 }
1045
1046 static void usbduxsigma_pwm_urb_complete(struct urb *urb)
1047 {
1048 struct comedi_device *dev = urb->context;
1049 struct usbduxsigma_private *devpriv = dev->private;
1050 int ret;
1051
1052 switch (urb->status) {
1053 case 0:
1054 /* success */
1055 break;
1056
1057 case -ECONNRESET:
1058 case -ENOENT:
1059 case -ESHUTDOWN:
1060 case -ECONNABORTED:
1061 /* happens after an unlink command */
1062 if (devpriv->pwm_cmd_running)
1063 usbduxsigma_pwm_stop(dev, 0); /* w/o unlink */
1064 return;
1065
1066 default:
1067 /* a real error */
1068 if (devpriv->pwm_cmd_running) {
1069 dev_err(dev->class_dev, "non-zero urb status (%d)\n",
1070 urb->status);
1071 usbduxsigma_pwm_stop(dev, 0); /* w/o unlink */
1072 }
1073 return;
1074 }
1075
1076 if (!devpriv->pwm_cmd_running)
1077 return;
1078
1079 urb->transfer_buffer_length = devpriv->pwm_buf_sz;
1080 urb->dev = comedi_to_usb_dev(dev);
1081 urb->status = 0;
1082 ret = usb_submit_urb(urb, GFP_ATOMIC);
1083 if (ret < 0) {
1084 dev_err(dev->class_dev, "urb resubmit failed (%d)\n", ret);
1085 if (ret == -EL2NSYNC)
1086 dev_err(dev->class_dev,
1087 "buggy USB host controller or bug in IRQ handler\n");
1088 usbduxsigma_pwm_stop(dev, 0); /* w/o unlink */
1089 }
1090 }
1091
1092 static int usbduxsigma_submit_pwm_urb(struct comedi_device *dev)
1093 {
1094 struct usb_device *usb = comedi_to_usb_dev(dev);
1095 struct usbduxsigma_private *devpriv = dev->private;
1096 struct urb *urb = devpriv->pwm_urb;
1097
1098 /* in case of a resubmission after an unlink... */
1099 usb_fill_bulk_urb(urb, usb, usb_sndbulkpipe(usb, 4),
1100 urb->transfer_buffer, devpriv->pwm_buf_sz,
1101 usbduxsigma_pwm_urb_complete, dev);
1102
1103 return usb_submit_urb(urb, GFP_ATOMIC);
1104 }
1105
1106 static int usbduxsigma_pwm_period(struct comedi_device *dev,
1107 struct comedi_subdevice *s,
1108 unsigned int period)
1109 {
1110 struct usbduxsigma_private *devpriv = dev->private;
1111 int fx2delay = 255;
1112
1113 if (period < MIN_PWM_PERIOD)
1114 return -EAGAIN;
1115
1116 fx2delay = (period / (6 * 512 * 1000 / 33)) - 6;
1117 if (fx2delay > 255)
1118 return -EAGAIN;
1119
1120 devpriv->pwm_delay = fx2delay;
1121 devpriv->pwm_period = period;
1122 return 0;
1123 }
1124
1125 static int usbduxsigma_pwm_start(struct comedi_device *dev,
1126 struct comedi_subdevice *s)
1127 {
1128 struct usbduxsigma_private *devpriv = dev->private;
1129 int ret;
1130
1131 if (devpriv->pwm_cmd_running)
1132 return 0;
1133
1134 devpriv->dux_commands[1] = devpriv->pwm_delay;
1135 ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_PWM_ON_CMD);
1136 if (ret < 0)
1137 return ret;
1138
1139 memset(devpriv->pwm_urb->transfer_buffer, 0, devpriv->pwm_buf_sz);
1140
1141 devpriv->pwm_cmd_running = 1;
1142 ret = usbduxsigma_submit_pwm_urb(dev);
1143 if (ret < 0) {
1144 devpriv->pwm_cmd_running = 0;
1145 return ret;
1146 }
1147
1148 return 0;
1149 }
1150
1151 static void usbduxsigma_pwm_pattern(struct comedi_device *dev,
1152 struct comedi_subdevice *s,
1153 unsigned int chan,
1154 unsigned int value,
1155 unsigned int sign)
1156 {
1157 struct usbduxsigma_private *devpriv = dev->private;
1158 char pwm_mask = (1 << chan); /* DIO bit for the PWM data */
1159 char sgn_mask = (16 << chan); /* DIO bit for the sign */
1160 char *buf = (char *)(devpriv->pwm_urb->transfer_buffer);
1161 int szbuf = devpriv->pwm_buf_sz;
1162 int i;
1163
1164 for (i = 0; i < szbuf; i++) {
1165 char c = *buf;
1166
1167 c &= ~pwm_mask;
1168 if (i < value)
1169 c |= pwm_mask;
1170 if (!sign)
1171 c &= ~sgn_mask;
1172 else
1173 c |= sgn_mask;
1174 *buf++ = c;
1175 }
1176 }
1177
1178 static int usbduxsigma_pwm_write(struct comedi_device *dev,
1179 struct comedi_subdevice *s,
1180 struct comedi_insn *insn,
1181 unsigned int *data)
1182 {
1183 unsigned int chan = CR_CHAN(insn->chanspec);
1184
1185 /*
1186 * It doesn't make sense to support more than one value here
1187 * because it would just overwrite the PWM buffer.
1188 */
1189 if (insn->n != 1)
1190 return -EINVAL;
1191
1192 /*
1193 * The sign is set via a special INSN only, this gives us 8 bits
1194 * for normal operation, sign is 0 by default.
1195 */
1196 usbduxsigma_pwm_pattern(dev, s, chan, data[0], 0);
1197
1198 return insn->n;
1199 }
1200
1201 static int usbduxsigma_pwm_config(struct comedi_device *dev,
1202 struct comedi_subdevice *s,
1203 struct comedi_insn *insn,
1204 unsigned int *data)
1205 {
1206 struct usbduxsigma_private *devpriv = dev->private;
1207 unsigned int chan = CR_CHAN(insn->chanspec);
1208
1209 switch (data[0]) {
1210 case INSN_CONFIG_ARM:
1211 /*
1212 * if not zero the PWM is limited to a certain time which is
1213 * not supported here
1214 */
1215 if (data[1] != 0)
1216 return -EINVAL;
1217 return usbduxsigma_pwm_start(dev, s);
1218 case INSN_CONFIG_DISARM:
1219 return usbduxsigma_pwm_cancel(dev, s);
1220 case INSN_CONFIG_GET_PWM_STATUS:
1221 data[1] = devpriv->pwm_cmd_running;
1222 return 0;
1223 case INSN_CONFIG_PWM_SET_PERIOD:
1224 return usbduxsigma_pwm_period(dev, s, data[1]);
1225 case INSN_CONFIG_PWM_GET_PERIOD:
1226 data[1] = devpriv->pwm_period;
1227 return 0;
1228 case INSN_CONFIG_PWM_SET_H_BRIDGE:
1229 /*
1230 * data[1] = value
1231 * data[2] = sign (for a relay)
1232 */
1233 usbduxsigma_pwm_pattern(dev, s, chan, data[1], (data[2] != 0));
1234 return 0;
1235 case INSN_CONFIG_PWM_GET_H_BRIDGE:
1236 /* values are not kept in this driver, nothing to return */
1237 return -EINVAL;
1238 }
1239 return -EINVAL;
1240 }
1241
1242 static int usbduxsigma_getstatusinfo(struct comedi_device *dev, int chan)
1243 {
1244 struct usbduxsigma_private *devpriv = dev->private;
1245 uint8_t sysred;
1246 uint32_t val;
1247 int ret;
1248
1249 switch (chan) {
1250 default:
1251 case 0:
1252 sysred = 0; /* ADC zero */
1253 break;
1254 case 1:
1255 sysred = 1; /* ADC offset */
1256 break;
1257 case 2:
1258 sysred = 4; /* VCC */
1259 break;
1260 case 3:
1261 sysred = 8; /* temperature */
1262 break;
1263 case 4:
1264 sysred = 16; /* gain */
1265 break;
1266 case 5:
1267 sysred = 32; /* ref */
1268 break;
1269 }
1270
1271 devpriv->dux_commands[1] = 0x12; /* CONFIG0 */
1272 devpriv->dux_commands[2] = 0x80; /* CONFIG1: 2kHz sampling rate */
1273 devpriv->dux_commands[3] = 0x00; /* CONFIG3: diff. channels off */
1274 devpriv->dux_commands[4] = 0;
1275 devpriv->dux_commands[5] = 0;
1276 devpriv->dux_commands[6] = sysred;
1277 ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD);
1278 if (ret < 0)
1279 return ret;
1280
1281 ret = usbduxsigma_receive_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD);
1282 if (ret < 0)
1283 return ret;
1284
1285 /* 32 bits big endian from the A/D converter */
1286 val = be32_to_cpu(get_unaligned((__be32 *)(devpriv->insn_buf + 1)));
1287 val &= 0x00ffffff; /* strip status byte */
1288 val ^= 0x00800000; /* convert to unsigned */
1289
1290 return (int)val;
1291 }
1292
1293 static int usbduxsigma_firmware_upload(struct comedi_device *dev,
1294 const u8 *data, size_t size,
1295 unsigned long context)
1296 {
1297 struct usb_device *usb = comedi_to_usb_dev(dev);
1298 uint8_t *buf;
1299 uint8_t *tmp;
1300 int ret;
1301
1302 if (!data)
1303 return 0;
1304
1305 if (size > FIRMWARE_MAX_LEN) {
1306 dev_err(dev->class_dev, "firmware binary too large for FX2\n");
1307 return -ENOMEM;
1308 }
1309
1310 /* we generate a local buffer for the firmware */
1311 buf = kmemdup(data, size, GFP_KERNEL);
1312 if (!buf)
1313 return -ENOMEM;
1314
1315 /* we need a malloc'ed buffer for usb_control_msg() */
1316 tmp = kmalloc(1, GFP_KERNEL);
1317 if (!tmp) {
1318 kfree(buf);
1319 return -ENOMEM;
1320 }
1321
1322 /* stop the current firmware on the device */
1323 *tmp = 1; /* 7f92 to one */
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 stop firmware\n");
1332 goto done;
1333 }
1334
1335 /* upload the new firmware to the device */
1336 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
1337 USBDUXSUB_FIRMWARE,
1338 VENDOR_DIR_OUT,
1339 0, 0x0000,
1340 buf, size,
1341 BULK_TIMEOUT);
1342 if (ret < 0) {
1343 dev_err(dev->class_dev, "firmware upload failed\n");
1344 goto done;
1345 }
1346
1347 /* start the new firmware on the device */
1348 *tmp = 0; /* 7f92 to zero */
1349 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
1350 USBDUXSUB_FIRMWARE,
1351 VENDOR_DIR_OUT,
1352 USBDUXSUB_CPUCS, 0x0000,
1353 tmp, 1,
1354 BULK_TIMEOUT);
1355 if (ret < 0)
1356 dev_err(dev->class_dev, "can not start firmware\n");
1357
1358 done:
1359 kfree(tmp);
1360 kfree(buf);
1361 return ret;
1362 }
1363
1364 static int usbduxsigma_alloc_usb_buffers(struct comedi_device *dev)
1365 {
1366 struct usb_device *usb = comedi_to_usb_dev(dev);
1367 struct usbduxsigma_private *devpriv = dev->private;
1368 struct urb *urb;
1369 int i;
1370
1371 devpriv->dux_commands = kzalloc(SIZEOFDUXBUFFER, GFP_KERNEL);
1372 devpriv->in_buf = kzalloc(SIZEINBUF, GFP_KERNEL);
1373 devpriv->insn_buf = kzalloc(SIZEINSNBUF, GFP_KERNEL);
1374 devpriv->ai_urbs = kcalloc(devpriv->n_ai_urbs, sizeof(urb), GFP_KERNEL);
1375 devpriv->ao_urbs = kcalloc(devpriv->n_ao_urbs, sizeof(urb), GFP_KERNEL);
1376 if (!devpriv->dux_commands || !devpriv->in_buf || !devpriv->insn_buf ||
1377 !devpriv->ai_urbs || !devpriv->ao_urbs)
1378 return -ENOMEM;
1379
1380 for (i = 0; i < devpriv->n_ai_urbs; i++) {
1381 /* one frame: 1ms */
1382 urb = usb_alloc_urb(1, GFP_KERNEL);
1383 if (!urb)
1384 return -ENOMEM;
1385 devpriv->ai_urbs[i] = urb;
1386 urb->dev = usb;
1387 /* will be filled later with a pointer to the comedi-device */
1388 /* and ONLY then the urb should be submitted */
1389 urb->context = NULL;
1390 urb->pipe = usb_rcvisocpipe(usb, 6);
1391 urb->transfer_flags = URB_ISO_ASAP;
1392 urb->transfer_buffer = kzalloc(SIZEINBUF, GFP_KERNEL);
1393 if (!urb->transfer_buffer)
1394 return -ENOMEM;
1395 urb->complete = usbduxsigma_ai_urb_complete;
1396 urb->number_of_packets = 1;
1397 urb->transfer_buffer_length = SIZEINBUF;
1398 urb->iso_frame_desc[0].offset = 0;
1399 urb->iso_frame_desc[0].length = SIZEINBUF;
1400 }
1401
1402 for (i = 0; i < devpriv->n_ao_urbs; i++) {
1403 /* one frame: 1ms */
1404 urb = usb_alloc_urb(1, GFP_KERNEL);
1405 if (!urb)
1406 return -ENOMEM;
1407 devpriv->ao_urbs[i] = urb;
1408 urb->dev = usb;
1409 /* will be filled later with a pointer to the comedi-device */
1410 /* and ONLY then the urb should be submitted */
1411 urb->context = NULL;
1412 urb->pipe = usb_sndisocpipe(usb, 2);
1413 urb->transfer_flags = URB_ISO_ASAP;
1414 urb->transfer_buffer = kzalloc(SIZEOUTBUF, GFP_KERNEL);
1415 if (!urb->transfer_buffer)
1416 return -ENOMEM;
1417 urb->complete = usbduxsigma_ao_urb_complete;
1418 urb->number_of_packets = 1;
1419 urb->transfer_buffer_length = SIZEOUTBUF;
1420 urb->iso_frame_desc[0].offset = 0;
1421 urb->iso_frame_desc[0].length = SIZEOUTBUF;
1422 urb->interval = 1; /* (u)frames */
1423 }
1424
1425 if (devpriv->pwm_buf_sz) {
1426 urb = usb_alloc_urb(0, GFP_KERNEL);
1427 if (!urb)
1428 return -ENOMEM;
1429 devpriv->pwm_urb = urb;
1430
1431 urb->transfer_buffer = kzalloc(devpriv->pwm_buf_sz,
1432 GFP_KERNEL);
1433 if (!urb->transfer_buffer)
1434 return -ENOMEM;
1435 }
1436
1437 return 0;
1438 }
1439
1440 static void usbduxsigma_free_usb_buffers(struct comedi_device *dev)
1441 {
1442 struct usbduxsigma_private *devpriv = dev->private;
1443 struct urb *urb;
1444 int i;
1445
1446 urb = devpriv->pwm_urb;
1447 if (urb) {
1448 kfree(urb->transfer_buffer);
1449 usb_free_urb(urb);
1450 }
1451 if (devpriv->ao_urbs) {
1452 for (i = 0; i < devpriv->n_ao_urbs; i++) {
1453 urb = devpriv->ao_urbs[i];
1454 if (urb) {
1455 kfree(urb->transfer_buffer);
1456 usb_free_urb(urb);
1457 }
1458 }
1459 kfree(devpriv->ao_urbs);
1460 }
1461 if (devpriv->ai_urbs) {
1462 for (i = 0; i < devpriv->n_ai_urbs; i++) {
1463 urb = devpriv->ai_urbs[i];
1464 if (urb) {
1465 kfree(urb->transfer_buffer);
1466 usb_free_urb(urb);
1467 }
1468 }
1469 kfree(devpriv->ai_urbs);
1470 }
1471 kfree(devpriv->insn_buf);
1472 kfree(devpriv->in_buf);
1473 kfree(devpriv->dux_commands);
1474 }
1475
1476 static int usbduxsigma_auto_attach(struct comedi_device *dev,
1477 unsigned long context_unused)
1478 {
1479 struct usb_interface *intf = comedi_to_usb_interface(dev);
1480 struct usb_device *usb = comedi_to_usb_dev(dev);
1481 struct usbduxsigma_private *devpriv;
1482 struct comedi_subdevice *s;
1483 int offset;
1484 int ret;
1485
1486 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
1487 if (!devpriv)
1488 return -ENOMEM;
1489
1490 sema_init(&devpriv->sem, 1);
1491
1492 usb_set_intfdata(intf, devpriv);
1493
1494 devpriv->high_speed = (usb->speed == USB_SPEED_HIGH);
1495 if (devpriv->high_speed) {
1496 devpriv->n_ai_urbs = NUMOFINBUFFERSHIGH;
1497 devpriv->n_ao_urbs = NUMOFOUTBUFFERSHIGH;
1498 devpriv->pwm_buf_sz = 512;
1499 } else {
1500 devpriv->n_ai_urbs = NUMOFINBUFFERSFULL;
1501 devpriv->n_ao_urbs = NUMOFOUTBUFFERSFULL;
1502 }
1503
1504 ret = usbduxsigma_alloc_usb_buffers(dev);
1505 if (ret)
1506 return ret;
1507
1508 /* setting to alternate setting 3: enabling iso ep and bulk ep. */
1509 ret = usb_set_interface(usb, intf->altsetting->desc.bInterfaceNumber,
1510 3);
1511 if (ret < 0) {
1512 dev_err(dev->class_dev,
1513 "could not set alternate setting 3 in high speed\n");
1514 return ret;
1515 }
1516
1517 ret = comedi_load_firmware(dev, &usb->dev, FIRMWARE,
1518 usbduxsigma_firmware_upload, 0);
1519 if (ret)
1520 return ret;
1521
1522 ret = comedi_alloc_subdevices(dev, (devpriv->high_speed) ? 4 : 3);
1523 if (ret)
1524 return ret;
1525
1526 /* Analog Input subdevice */
1527 s = &dev->subdevices[0];
1528 dev->read_subdev = s;
1529 s->type = COMEDI_SUBD_AI;
1530 s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ | SDF_LSAMPL;
1531 s->n_chan = NUMCHANNELS;
1532 s->len_chanlist = NUMCHANNELS;
1533 s->maxdata = 0x00ffffff;
1534 s->range_table = &usbduxsigma_ai_range;
1535 s->insn_read = usbduxsigma_ai_insn_read;
1536 s->do_cmdtest = usbduxsigma_ai_cmdtest;
1537 s->do_cmd = usbduxsigma_ai_cmd;
1538 s->cancel = usbduxsigma_ai_cancel;
1539
1540 /* Analog Output subdevice */
1541 s = &dev->subdevices[1];
1542 dev->write_subdev = s;
1543 s->type = COMEDI_SUBD_AO;
1544 s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_CMD_WRITE;
1545 s->n_chan = 4;
1546 s->len_chanlist = s->n_chan;
1547 s->maxdata = 0x00ff;
1548 s->range_table = &range_unipolar2_5;
1549 s->insn_write = usbduxsigma_ao_insn_write;
1550 s->insn_read = usbduxsigma_ao_insn_read;
1551 s->do_cmdtest = usbduxsigma_ao_cmdtest;
1552 s->do_cmd = usbduxsigma_ao_cmd;
1553 s->cancel = usbduxsigma_ao_cancel;
1554
1555 ret = comedi_alloc_subdev_readback(s);
1556 if (ret)
1557 return ret;
1558
1559 /* Digital I/O subdevice */
1560 s = &dev->subdevices[2];
1561 s->type = COMEDI_SUBD_DIO;
1562 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
1563 s->n_chan = 24;
1564 s->maxdata = 1;
1565 s->range_table = &range_digital;
1566 s->insn_bits = usbduxsigma_dio_insn_bits;
1567 s->insn_config = usbduxsigma_dio_insn_config;
1568
1569 if (devpriv->high_speed) {
1570 /* Timer / pwm subdevice */
1571 s = &dev->subdevices[3];
1572 s->type = COMEDI_SUBD_PWM;
1573 s->subdev_flags = SDF_WRITABLE | SDF_PWM_HBRIDGE;
1574 s->n_chan = 8;
1575 s->maxdata = devpriv->pwm_buf_sz;
1576 s->insn_write = usbduxsigma_pwm_write;
1577 s->insn_config = usbduxsigma_pwm_config;
1578
1579 usbduxsigma_pwm_period(dev, s, PWM_DEFAULT_PERIOD);
1580 }
1581
1582 offset = usbduxsigma_getstatusinfo(dev, 0);
1583 if (offset < 0) {
1584 dev_err(dev->class_dev,
1585 "Communication to USBDUXSIGMA failed! Check firmware and cabling.\n");
1586 return offset;
1587 }
1588
1589 dev_info(dev->class_dev, "ADC_zero = %x\n", offset);
1590
1591 return 0;
1592 }
1593
1594 static void usbduxsigma_detach(struct comedi_device *dev)
1595 {
1596 struct usb_interface *intf = comedi_to_usb_interface(dev);
1597 struct usbduxsigma_private *devpriv = dev->private;
1598
1599 usb_set_intfdata(intf, NULL);
1600
1601 if (!devpriv)
1602 return;
1603
1604 down(&devpriv->sem);
1605
1606 /* force unlink all urbs */
1607 usbduxsigma_ai_stop(dev, 1);
1608 usbduxsigma_ao_stop(dev, 1);
1609 usbduxsigma_pwm_stop(dev, 1);
1610
1611 usbduxsigma_free_usb_buffers(dev);
1612
1613 up(&devpriv->sem);
1614 }
1615
1616 static struct comedi_driver usbduxsigma_driver = {
1617 .driver_name = "usbduxsigma",
1618 .module = THIS_MODULE,
1619 .auto_attach = usbduxsigma_auto_attach,
1620 .detach = usbduxsigma_detach,
1621 };
1622
1623 static int usbduxsigma_usb_probe(struct usb_interface *intf,
1624 const struct usb_device_id *id)
1625 {
1626 return comedi_usb_auto_config(intf, &usbduxsigma_driver, 0);
1627 }
1628
1629 static const struct usb_device_id usbduxsigma_usb_table[] = {
1630 { USB_DEVICE(0x13d8, 0x0020) },
1631 { USB_DEVICE(0x13d8, 0x0021) },
1632 { USB_DEVICE(0x13d8, 0x0022) },
1633 { }
1634 };
1635 MODULE_DEVICE_TABLE(usb, usbduxsigma_usb_table);
1636
1637 static struct usb_driver usbduxsigma_usb_driver = {
1638 .name = "usbduxsigma",
1639 .probe = usbduxsigma_usb_probe,
1640 .disconnect = comedi_usb_auto_unconfig,
1641 .id_table = usbduxsigma_usb_table,
1642 };
1643 module_comedi_usb_driver(usbduxsigma_driver, usbduxsigma_usb_driver);
1644
1645 MODULE_AUTHOR("Bernd Porr, mail@berndporr.me.uk");
1646 MODULE_DESCRIPTION("Stirling/ITL USB-DUX SIGMA -- mail@berndporr.me.uk");
1647 MODULE_LICENSE("GPL");
1648 MODULE_FIRMWARE(FIRMWARE);
Linux kernel - Deliverables
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