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staging: comedi: pcl818: Fix endian problem for AI command data
[mirror_ubuntu-hirsute-kernel.git] / drivers / staging / comedi / drivers / usbduxsigma.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * usbduxsigma.c
4 * Copyright (C) 2011-2015 Bernd Porr, mail@berndporr.me.uk
5 */
6
7 /*
8 * Driver: usbduxsigma
9 * Description: University of Stirling USB DAQ & INCITE Technology Limited
10 * Devices: [ITL] USB-DUX-SIGMA (usbduxsigma)
11 * Author: Bernd Porr <mail@berndporr.me.uk>
12 * Updated: 20 July 2015
13 * Status: stable
14 */
15
16 /*
17 * I must give credit here to Chris Baugher who
18 * wrote the driver for AT-MIO-16d. I used some parts of this
19 * driver. I also must give credits to David Brownell
20 * who supported me with the USB development.
21 *
22 * Note: the raw data from the A/D converter is 24 bit big endian
23 * anything else is little endian to/from the dux board
24 *
25 *
26 * Revision history:
27 * 0.1: initial version
28 * 0.2: all basic functions implemented, digital I/O only for one port
29 * 0.3: proper vendor ID and driver name
30 * 0.4: fixed D/A voltage range
31 * 0.5: various bug fixes, health check at startup
32 * 0.6: corrected wrong input range
33 * 0.7: rewrite code that urb->interval is always 1
34 */
35
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/slab.h>
39 #include <linux/input.h>
40 #include <linux/fcntl.h>
41 #include <linux/compiler.h>
42 #include <asm/unaligned.h>
43
44 #include "../comedi_usb.h"
45
46 /* timeout for the USB-transfer in ms*/
47 #define BULK_TIMEOUT 1000
48
49 /* constants for "firmware" upload and download */
50 #define FIRMWARE "usbduxsigma_firmware.bin"
51 #define FIRMWARE_MAX_LEN 0x4000
52 #define USBDUXSUB_FIRMWARE 0xa0
53 #define VENDOR_DIR_IN 0xc0
54 #define VENDOR_DIR_OUT 0x40
55
56 /* internal addresses of the 8051 processor */
57 #define USBDUXSUB_CPUCS 0xE600
58
59 /* 300Hz max frequ under PWM */
60 #define MIN_PWM_PERIOD ((long)(1E9 / 300))
61
62 /* Default PWM frequency */
63 #define PWM_DEFAULT_PERIOD ((long)(1E9 / 100))
64
65 /* Number of channels (16 AD and offset)*/
66 #define NUMCHANNELS 16
67
68 /* Size of one A/D value */
69 #define SIZEADIN ((sizeof(u32)))
70
71 /*
72 * Size of the async input-buffer IN BYTES, the DIO state is transmitted
73 * as the first byte.
74 */
75 #define SIZEINBUF (((NUMCHANNELS + 1) * SIZEADIN))
76
77 /* 16 bytes. */
78 #define SIZEINSNBUF 16
79
80 /* Number of DA channels */
81 #define NUMOUTCHANNELS 8
82
83 /* size of one value for the D/A converter: channel and value */
84 #define SIZEDAOUT ((sizeof(u8) + sizeof(uint16_t)))
85
86 /*
87 * Size of the output-buffer in bytes
88 * Actually only the first 4 triplets are used but for the
89 * high speed mode we need to pad it to 8 (microframes).
90 */
91 #define SIZEOUTBUF ((8 * SIZEDAOUT))
92
93 /*
94 * Size of the buffer for the dux commands: just now max size is determined
95 * by the analogue out + command byte + panic bytes...
96 */
97 #define SIZEOFDUXBUFFER ((8 * SIZEDAOUT + 2))
98
99 /* Number of in-URBs which receive the data: min=2 */
100 #define NUMOFINBUFFERSFULL 5
101
102 /* Number of out-URBs which send the data: min=2 */
103 #define NUMOFOUTBUFFERSFULL 5
104
105 /* Number of in-URBs which receive the data: min=5 */
106 /* must have more buffers due to buggy USB ctr */
107 #define NUMOFINBUFFERSHIGH 10
108
109 /* Number of out-URBs which send the data: min=5 */
110 /* must have more buffers due to buggy USB ctr */
111 #define NUMOFOUTBUFFERSHIGH 10
112
113 /* number of retries to get the right dux command */
114 #define RETRIES 10
115
116 /* bulk transfer commands to usbduxsigma */
117 #define USBBUXSIGMA_AD_CMD 9
118 #define USBDUXSIGMA_DA_CMD 1
119 #define USBDUXSIGMA_DIO_CFG_CMD 2
120 #define USBDUXSIGMA_DIO_BITS_CMD 3
121 #define USBDUXSIGMA_SINGLE_AD_CMD 4
122 #define USBDUXSIGMA_PWM_ON_CMD 7
123 #define USBDUXSIGMA_PWM_OFF_CMD 8
124
125 static const struct comedi_lrange usbduxsigma_ai_range = {
126 1, {
127 BIP_RANGE(2.5 * 0x800000 / 0x780000 / 2.0)
128 }
129 };
130
131 struct usbduxsigma_private {
132 /* actual number of in-buffers */
133 int n_ai_urbs;
134 /* actual number of out-buffers */
135 int n_ao_urbs;
136 /* ISO-transfer handling: buffers */
137 struct urb **ai_urbs;
138 struct urb **ao_urbs;
139 /* pwm-transfer handling */
140 struct urb *pwm_urb;
141 /* PWM period */
142 unsigned int pwm_period;
143 /* PWM internal delay for the GPIF in the FX2 */
144 u8 pwm_delay;
145 /* size of the PWM buffer which holds the bit pattern */
146 int pwm_buf_sz;
147 /* input buffer for the ISO-transfer */
148 __be32 *in_buf;
149 /* input buffer for single insn */
150 u8 *insn_buf;
151
152 unsigned high_speed:1;
153 unsigned ai_cmd_running:1;
154 unsigned ao_cmd_running:1;
155 unsigned pwm_cmd_running:1;
156
157 /* time between samples in units of the timer */
158 unsigned int ai_timer;
159 unsigned int ao_timer;
160 /* counter between acquisitions */
161 unsigned int ai_counter;
162 unsigned int ao_counter;
163 /* interval in frames/uframes */
164 unsigned int ai_interval;
165 /* commands */
166 u8 *dux_commands;
167 struct mutex mut;
168 };
169
170 static void usbduxsigma_unlink_urbs(struct urb **urbs, int num_urbs)
171 {
172 int i;
173
174 for (i = 0; i < num_urbs; i++)
175 usb_kill_urb(urbs[i]);
176 }
177
178 static void usbduxsigma_ai_stop(struct comedi_device *dev, int do_unlink)
179 {
180 struct usbduxsigma_private *devpriv = dev->private;
181
182 if (do_unlink && devpriv->ai_urbs)
183 usbduxsigma_unlink_urbs(devpriv->ai_urbs, devpriv->n_ai_urbs);
184
185 devpriv->ai_cmd_running = 0;
186 }
187
188 static int usbduxsigma_ai_cancel(struct comedi_device *dev,
189 struct comedi_subdevice *s)
190 {
191 struct usbduxsigma_private *devpriv = dev->private;
192
193 mutex_lock(&devpriv->mut);
194 /* unlink only if it is really running */
195 usbduxsigma_ai_stop(dev, devpriv->ai_cmd_running);
196 mutex_unlock(&devpriv->mut);
197
198 return 0;
199 }
200
201 static void usbduxsigma_ai_handle_urb(struct comedi_device *dev,
202 struct comedi_subdevice *s,
203 struct urb *urb)
204 {
205 struct usbduxsigma_private *devpriv = dev->private;
206 struct comedi_async *async = s->async;
207 struct comedi_cmd *cmd = &async->cmd;
208 u32 val;
209 int ret;
210 int i;
211
212 if ((urb->actual_length > 0) && (urb->status != -EXDEV)) {
213 devpriv->ai_counter--;
214 if (devpriv->ai_counter == 0) {
215 devpriv->ai_counter = devpriv->ai_timer;
216
217 /*
218 * Get the data from the USB bus and hand it over
219 * to comedi. Note, first byte is the DIO state.
220 */
221 for (i = 0; i < cmd->chanlist_len; i++) {
222 val = be32_to_cpu(devpriv->in_buf[i + 1]);
223 val &= 0x00ffffff; /* strip status byte */
224 val = comedi_offset_munge(s, val);
225 if (!comedi_buf_write_samples(s, &val, 1))
226 return;
227 }
228
229 if (cmd->stop_src == TRIG_COUNT &&
230 async->scans_done >= cmd->stop_arg)
231 async->events |= COMEDI_CB_EOA;
232 }
233 }
234
235 /* if command is still running, resubmit urb */
236 if (!(async->events & COMEDI_CB_CANCEL_MASK)) {
237 urb->dev = comedi_to_usb_dev(dev);
238 ret = usb_submit_urb(urb, GFP_ATOMIC);
239 if (ret < 0) {
240 dev_err(dev->class_dev, "urb resubmit failed (%d)\n",
241 ret);
242 if (ret == -EL2NSYNC)
243 dev_err(dev->class_dev,
244 "buggy USB host controller or bug in IRQ handler\n");
245 async->events |= COMEDI_CB_ERROR;
246 }
247 }
248 }
249
250 static void usbduxsigma_ai_urb_complete(struct urb *urb)
251 {
252 struct comedi_device *dev = urb->context;
253 struct usbduxsigma_private *devpriv = dev->private;
254 struct comedi_subdevice *s = dev->read_subdev;
255 struct comedi_async *async = s->async;
256
257 /* exit if not running a command, do not resubmit urb */
258 if (!devpriv->ai_cmd_running)
259 return;
260
261 switch (urb->status) {
262 case 0:
263 /* copy the result in the transfer buffer */
264 memcpy(devpriv->in_buf, urb->transfer_buffer, SIZEINBUF);
265 usbduxsigma_ai_handle_urb(dev, s, urb);
266 break;
267
268 case -EILSEQ:
269 /*
270 * error in the ISOchronous data
271 * we don't copy the data into the transfer buffer
272 * and recycle the last data byte
273 */
274 dev_dbg(dev->class_dev, "CRC error in ISO IN stream\n");
275 usbduxsigma_ai_handle_urb(dev, s, urb);
276 break;
277
278 case -ECONNRESET:
279 case -ENOENT:
280 case -ESHUTDOWN:
281 case -ECONNABORTED:
282 /* happens after an unlink command */
283 async->events |= COMEDI_CB_ERROR;
284 break;
285
286 default:
287 /* a real error */
288 dev_err(dev->class_dev, "non-zero urb status (%d)\n",
289 urb->status);
290 async->events |= COMEDI_CB_ERROR;
291 break;
292 }
293
294 /*
295 * comedi_handle_events() cannot be used in this driver. The (*cancel)
296 * operation would unlink the urb.
297 */
298 if (async->events & COMEDI_CB_CANCEL_MASK)
299 usbduxsigma_ai_stop(dev, 0);
300
301 comedi_event(dev, s);
302 }
303
304 static void usbduxsigma_ao_stop(struct comedi_device *dev, int do_unlink)
305 {
306 struct usbduxsigma_private *devpriv = dev->private;
307
308 if (do_unlink && devpriv->ao_urbs)
309 usbduxsigma_unlink_urbs(devpriv->ao_urbs, devpriv->n_ao_urbs);
310
311 devpriv->ao_cmd_running = 0;
312 }
313
314 static int usbduxsigma_ao_cancel(struct comedi_device *dev,
315 struct comedi_subdevice *s)
316 {
317 struct usbduxsigma_private *devpriv = dev->private;
318
319 mutex_lock(&devpriv->mut);
320 /* unlink only if it is really running */
321 usbduxsigma_ao_stop(dev, devpriv->ao_cmd_running);
322 mutex_unlock(&devpriv->mut);
323
324 return 0;
325 }
326
327 static void usbduxsigma_ao_handle_urb(struct comedi_device *dev,
328 struct comedi_subdevice *s,
329 struct urb *urb)
330 {
331 struct usbduxsigma_private *devpriv = dev->private;
332 struct comedi_async *async = s->async;
333 struct comedi_cmd *cmd = &async->cmd;
334 u8 *datap;
335 int ret;
336 int i;
337
338 devpriv->ao_counter--;
339 if (devpriv->ao_counter == 0) {
340 devpriv->ao_counter = devpriv->ao_timer;
341
342 if (cmd->stop_src == TRIG_COUNT &&
343 async->scans_done >= cmd->stop_arg) {
344 async->events |= COMEDI_CB_EOA;
345 return;
346 }
347
348 /* transmit data to the USB bus */
349 datap = urb->transfer_buffer;
350 *datap++ = cmd->chanlist_len;
351 for (i = 0; i < cmd->chanlist_len; i++) {
352 unsigned int chan = CR_CHAN(cmd->chanlist[i]);
353 unsigned short val;
354
355 if (!comedi_buf_read_samples(s, &val, 1)) {
356 dev_err(dev->class_dev, "buffer underflow\n");
357 async->events |= COMEDI_CB_OVERFLOW;
358 return;
359 }
360
361 *datap++ = val;
362 *datap++ = chan;
363 s->readback[chan] = val;
364 }
365 }
366
367 /* if command is still running, resubmit urb */
368 if (!(async->events & COMEDI_CB_CANCEL_MASK)) {
369 urb->transfer_buffer_length = SIZEOUTBUF;
370 urb->dev = comedi_to_usb_dev(dev);
371 urb->status = 0;
372 urb->interval = 1; /* (u)frames */
373 urb->number_of_packets = 1;
374 urb->iso_frame_desc[0].offset = 0;
375 urb->iso_frame_desc[0].length = SIZEOUTBUF;
376 urb->iso_frame_desc[0].status = 0;
377 ret = usb_submit_urb(urb, GFP_ATOMIC);
378 if (ret < 0) {
379 dev_err(dev->class_dev, "urb resubmit failed (%d)\n",
380 ret);
381 if (ret == -EL2NSYNC)
382 dev_err(dev->class_dev,
383 "buggy USB host controller or bug in IRQ handler\n");
384 async->events |= COMEDI_CB_ERROR;
385 }
386 }
387 }
388
389 static void usbduxsigma_ao_urb_complete(struct urb *urb)
390 {
391 struct comedi_device *dev = urb->context;
392 struct usbduxsigma_private *devpriv = dev->private;
393 struct comedi_subdevice *s = dev->write_subdev;
394 struct comedi_async *async = s->async;
395
396 /* exit if not running a command, do not resubmit urb */
397 if (!devpriv->ao_cmd_running)
398 return;
399
400 switch (urb->status) {
401 case 0:
402 usbduxsigma_ao_handle_urb(dev, s, urb);
403 break;
404
405 case -ECONNRESET:
406 case -ENOENT:
407 case -ESHUTDOWN:
408 case -ECONNABORTED:
409 /* happens after an unlink command */
410 async->events |= COMEDI_CB_ERROR;
411 break;
412
413 default:
414 /* a real error */
415 dev_err(dev->class_dev, "non-zero urb status (%d)\n",
416 urb->status);
417 async->events |= COMEDI_CB_ERROR;
418 break;
419 }
420
421 /*
422 * comedi_handle_events() cannot be used in this driver. The (*cancel)
423 * operation would unlink the urb.
424 */
425 if (async->events & COMEDI_CB_CANCEL_MASK)
426 usbduxsigma_ao_stop(dev, 0);
427
428 comedi_event(dev, s);
429 }
430
431 static int usbduxsigma_submit_urbs(struct comedi_device *dev,
432 struct urb **urbs, int num_urbs,
433 int input_urb)
434 {
435 struct usb_device *usb = comedi_to_usb_dev(dev);
436 struct urb *urb;
437 int ret;
438 int i;
439
440 /* Submit all URBs and start the transfer on the bus */
441 for (i = 0; i < num_urbs; i++) {
442 urb = urbs[i];
443
444 /* in case of a resubmission after an unlink... */
445 if (input_urb)
446 urb->interval = 1;
447 urb->context = dev;
448 urb->dev = usb;
449 urb->status = 0;
450 urb->transfer_flags = URB_ISO_ASAP;
451
452 ret = usb_submit_urb(urb, GFP_ATOMIC);
453 if (ret)
454 return ret;
455 }
456 return 0;
457 }
458
459 static int usbduxsigma_chans_to_interval(int num_chan)
460 {
461 if (num_chan <= 2)
462 return 2; /* 4kHz */
463 if (num_chan <= 8)
464 return 4; /* 2kHz */
465 return 8; /* 1kHz */
466 }
467
468 static int usbduxsigma_ai_cmdtest(struct comedi_device *dev,
469 struct comedi_subdevice *s,
470 struct comedi_cmd *cmd)
471 {
472 struct usbduxsigma_private *devpriv = dev->private;
473 int high_speed = devpriv->high_speed;
474 int interval = usbduxsigma_chans_to_interval(cmd->chanlist_len);
475 unsigned int tmp;
476 int err = 0;
477
478 /* Step 1 : check if triggers are trivially valid */
479
480 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
481 err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_TIMER);
482 err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW);
483 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
484 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
485
486 if (err)
487 return 1;
488
489 /* Step 2a : make sure trigger sources are unique */
490
491 err |= comedi_check_trigger_is_unique(cmd->start_src);
492 err |= comedi_check_trigger_is_unique(cmd->stop_src);
493
494 /* Step 2b : and mutually compatible */
495
496 if (err)
497 return 2;
498
499 /* Step 3: check if arguments are trivially valid */
500
501 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
502
503 if (high_speed) {
504 /*
505 * In high speed mode microframes are possible.
506 * However, during one microframe we can roughly
507 * sample two channels. Thus, the more channels
508 * are in the channel list the more time we need.
509 */
510 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
511 (125000 * interval));
512 } else {
513 /* full speed */
514 /* 1kHz scans every USB frame */
515 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
516 1000000);
517 }
518
519 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
520 cmd->chanlist_len);
521
522 if (cmd->stop_src == TRIG_COUNT)
523 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
524 else /* TRIG_NONE */
525 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
526
527 if (err)
528 return 3;
529
530 /* Step 4: fix up any arguments */
531
532 tmp = rounddown(cmd->scan_begin_arg, high_speed ? 125000 : 1000000);
533 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, tmp);
534
535 if (err)
536 return 4;
537
538 return 0;
539 }
540
541 /*
542 * creates the ADC command for the MAX1271
543 * range is the range value from comedi
544 */
545 static void create_adc_command(unsigned int chan,
546 u8 *muxsg0, u8 *muxsg1)
547 {
548 if (chan < 8)
549 (*muxsg0) = (*muxsg0) | (1 << chan);
550 else if (chan < 16)
551 (*muxsg1) = (*muxsg1) | (1 << (chan - 8));
552 }
553
554 static int usbbuxsigma_send_cmd(struct comedi_device *dev, int cmd_type)
555 {
556 struct usb_device *usb = comedi_to_usb_dev(dev);
557 struct usbduxsigma_private *devpriv = dev->private;
558 int nsent;
559
560 devpriv->dux_commands[0] = cmd_type;
561
562 return usb_bulk_msg(usb, usb_sndbulkpipe(usb, 1),
563 devpriv->dux_commands, SIZEOFDUXBUFFER,
564 &nsent, BULK_TIMEOUT);
565 }
566
567 static int usbduxsigma_receive_cmd(struct comedi_device *dev, int command)
568 {
569 struct usb_device *usb = comedi_to_usb_dev(dev);
570 struct usbduxsigma_private *devpriv = dev->private;
571 int nrec;
572 int ret;
573 int i;
574
575 for (i = 0; i < RETRIES; i++) {
576 ret = usb_bulk_msg(usb, usb_rcvbulkpipe(usb, 8),
577 devpriv->insn_buf, SIZEINSNBUF,
578 &nrec, BULK_TIMEOUT);
579 if (ret < 0)
580 return ret;
581
582 if (devpriv->insn_buf[0] == command)
583 return 0;
584 }
585 /*
586 * This is only reached if the data has been requested a
587 * couple of times and the command was not received.
588 */
589 return -EFAULT;
590 }
591
592 static int usbduxsigma_ai_inttrig(struct comedi_device *dev,
593 struct comedi_subdevice *s,
594 unsigned int trig_num)
595 {
596 struct usbduxsigma_private *devpriv = dev->private;
597 struct comedi_cmd *cmd = &s->async->cmd;
598 int ret;
599
600 if (trig_num != cmd->start_arg)
601 return -EINVAL;
602
603 mutex_lock(&devpriv->mut);
604 if (!devpriv->ai_cmd_running) {
605 devpriv->ai_cmd_running = 1;
606 ret = usbduxsigma_submit_urbs(dev, devpriv->ai_urbs,
607 devpriv->n_ai_urbs, 1);
608 if (ret < 0) {
609 devpriv->ai_cmd_running = 0;
610 mutex_unlock(&devpriv->mut);
611 return ret;
612 }
613 s->async->inttrig = NULL;
614 }
615 mutex_unlock(&devpriv->mut);
616
617 return 1;
618 }
619
620 static int usbduxsigma_ai_cmd(struct comedi_device *dev,
621 struct comedi_subdevice *s)
622 {
623 struct usbduxsigma_private *devpriv = dev->private;
624 struct comedi_cmd *cmd = &s->async->cmd;
625 unsigned int len = cmd->chanlist_len;
626 u8 muxsg0 = 0;
627 u8 muxsg1 = 0;
628 u8 sysred = 0;
629 int ret;
630 int i;
631
632 mutex_lock(&devpriv->mut);
633
634 if (devpriv->high_speed) {
635 /*
636 * every 2 channels get a time window of 125us. Thus, if we
637 * sample all 16 channels we need 1ms. If we sample only one
638 * channel we need only 125us
639 */
640 unsigned int interval = usbduxsigma_chans_to_interval(len);
641
642 devpriv->ai_interval = interval;
643 devpriv->ai_timer = cmd->scan_begin_arg / (125000 * interval);
644 } else {
645 /* interval always 1ms */
646 devpriv->ai_interval = 1;
647 devpriv->ai_timer = cmd->scan_begin_arg / 1000000;
648 }
649
650 for (i = 0; i < len; i++) {
651 unsigned int chan = CR_CHAN(cmd->chanlist[i]);
652
653 create_adc_command(chan, &muxsg0, &muxsg1);
654 }
655
656 devpriv->dux_commands[1] = devpriv->ai_interval;
657 devpriv->dux_commands[2] = len; /* num channels per time step */
658 devpriv->dux_commands[3] = 0x12; /* CONFIG0 */
659 devpriv->dux_commands[4] = 0x03; /* CONFIG1: 23kHz sample, delay 0us */
660 devpriv->dux_commands[5] = 0x00; /* CONFIG3: diff. channels off */
661 devpriv->dux_commands[6] = muxsg0;
662 devpriv->dux_commands[7] = muxsg1;
663 devpriv->dux_commands[8] = sysred;
664
665 ret = usbbuxsigma_send_cmd(dev, USBBUXSIGMA_AD_CMD);
666 if (ret < 0) {
667 mutex_unlock(&devpriv->mut);
668 return ret;
669 }
670
671 devpriv->ai_counter = devpriv->ai_timer;
672
673 if (cmd->start_src == TRIG_NOW) {
674 /* enable this acquisition operation */
675 devpriv->ai_cmd_running = 1;
676 ret = usbduxsigma_submit_urbs(dev, devpriv->ai_urbs,
677 devpriv->n_ai_urbs, 1);
678 if (ret < 0) {
679 devpriv->ai_cmd_running = 0;
680 mutex_unlock(&devpriv->mut);
681 return ret;
682 }
683 s->async->inttrig = NULL;
684 } else { /* TRIG_INT */
685 s->async->inttrig = usbduxsigma_ai_inttrig;
686 }
687
688 mutex_unlock(&devpriv->mut);
689
690 return 0;
691 }
692
693 static int usbduxsigma_ai_insn_read(struct comedi_device *dev,
694 struct comedi_subdevice *s,
695 struct comedi_insn *insn,
696 unsigned int *data)
697 {
698 struct usbduxsigma_private *devpriv = dev->private;
699 unsigned int chan = CR_CHAN(insn->chanspec);
700 u8 muxsg0 = 0;
701 u8 muxsg1 = 0;
702 u8 sysred = 0;
703 int ret;
704 int i;
705
706 mutex_lock(&devpriv->mut);
707 if (devpriv->ai_cmd_running) {
708 mutex_unlock(&devpriv->mut);
709 return -EBUSY;
710 }
711
712 create_adc_command(chan, &muxsg0, &muxsg1);
713
714 /* Mode 0 is used to get a single conversion on demand */
715 devpriv->dux_commands[1] = 0x16; /* CONFIG0: chopper on */
716 devpriv->dux_commands[2] = 0x80; /* CONFIG1: 2kHz sampling rate */
717 devpriv->dux_commands[3] = 0x00; /* CONFIG3: diff. channels off */
718 devpriv->dux_commands[4] = muxsg0;
719 devpriv->dux_commands[5] = muxsg1;
720 devpriv->dux_commands[6] = sysred;
721
722 /* adc commands */
723 ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD);
724 if (ret < 0) {
725 mutex_unlock(&devpriv->mut);
726 return ret;
727 }
728
729 for (i = 0; i < insn->n; i++) {
730 u32 val;
731
732 ret = usbduxsigma_receive_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD);
733 if (ret < 0) {
734 mutex_unlock(&devpriv->mut);
735 return ret;
736 }
737
738 /* 32 bits big endian from the A/D converter */
739 val = be32_to_cpu(get_unaligned((__be32
740 *)(devpriv->insn_buf + 1)));
741 val &= 0x00ffffff; /* strip status byte */
742 data[i] = comedi_offset_munge(s, val);
743 }
744 mutex_unlock(&devpriv->mut);
745
746 return insn->n;
747 }
748
749 static int usbduxsigma_ao_insn_read(struct comedi_device *dev,
750 struct comedi_subdevice *s,
751 struct comedi_insn *insn,
752 unsigned int *data)
753 {
754 struct usbduxsigma_private *devpriv = dev->private;
755 int ret;
756
757 mutex_lock(&devpriv->mut);
758 ret = comedi_readback_insn_read(dev, s, insn, data);
759 mutex_unlock(&devpriv->mut);
760
761 return ret;
762 }
763
764 static int usbduxsigma_ao_insn_write(struct comedi_device *dev,
765 struct comedi_subdevice *s,
766 struct comedi_insn *insn,
767 unsigned int *data)
768 {
769 struct usbduxsigma_private *devpriv = dev->private;
770 unsigned int chan = CR_CHAN(insn->chanspec);
771 int ret;
772 int i;
773
774 mutex_lock(&devpriv->mut);
775 if (devpriv->ao_cmd_running) {
776 mutex_unlock(&devpriv->mut);
777 return -EBUSY;
778 }
779
780 for (i = 0; i < insn->n; i++) {
781 devpriv->dux_commands[1] = 1; /* num channels */
782 devpriv->dux_commands[2] = data[i]; /* value */
783 devpriv->dux_commands[3] = chan; /* channel number */
784 ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_DA_CMD);
785 if (ret < 0) {
786 mutex_unlock(&devpriv->mut);
787 return ret;
788 }
789 s->readback[chan] = data[i];
790 }
791 mutex_unlock(&devpriv->mut);
792
793 return insn->n;
794 }
795
796 static int usbduxsigma_ao_inttrig(struct comedi_device *dev,
797 struct comedi_subdevice *s,
798 unsigned int trig_num)
799 {
800 struct usbduxsigma_private *devpriv = dev->private;
801 struct comedi_cmd *cmd = &s->async->cmd;
802 int ret;
803
804 if (trig_num != cmd->start_arg)
805 return -EINVAL;
806
807 mutex_lock(&devpriv->mut);
808 if (!devpriv->ao_cmd_running) {
809 devpriv->ao_cmd_running = 1;
810 ret = usbduxsigma_submit_urbs(dev, devpriv->ao_urbs,
811 devpriv->n_ao_urbs, 0);
812 if (ret < 0) {
813 devpriv->ao_cmd_running = 0;
814 mutex_unlock(&devpriv->mut);
815 return ret;
816 }
817 s->async->inttrig = NULL;
818 }
819 mutex_unlock(&devpriv->mut);
820
821 return 1;
822 }
823
824 static int usbduxsigma_ao_cmdtest(struct comedi_device *dev,
825 struct comedi_subdevice *s,
826 struct comedi_cmd *cmd)
827 {
828 struct usbduxsigma_private *devpriv = dev->private;
829 unsigned int tmp;
830 int err = 0;
831
832 /* Step 1 : check if triggers are trivially valid */
833
834 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
835
836 /*
837 * For now, always use "scan" timing with all channels updated at once
838 * (cmd->scan_begin_src == TRIG_TIMER, cmd->convert_src == TRIG_NOW).
839 *
840 * In a future version, "convert" timing with channels updated
841 * indivually may be supported in high speed mode
842 * (cmd->scan_begin_src == TRIG_FOLLOW, cmd->convert_src == TRIG_TIMER).
843 */
844 err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_TIMER);
845 err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW);
846 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
847 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
848
849 if (err) {
850 mutex_unlock(&devpriv->mut);
851 return 1;
852 }
853
854 /* Step 2a : make sure trigger sources are unique */
855
856 err |= comedi_check_trigger_is_unique(cmd->start_src);
857 err |= comedi_check_trigger_is_unique(cmd->stop_src);
858
859 /* Step 2b : and mutually compatible */
860
861 if (err)
862 return 2;
863
864 /* Step 3: check if arguments are trivially valid */
865
866 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
867
868 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg, 1000000);
869
870 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
871 cmd->chanlist_len);
872
873 if (cmd->stop_src == TRIG_COUNT)
874 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
875 else /* TRIG_NONE */
876 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
877
878 if (err)
879 return 3;
880
881 /* Step 4: fix up any arguments */
882
883 tmp = rounddown(cmd->scan_begin_arg, 1000000);
884 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, tmp);
885
886 if (err)
887 return 4;
888
889 return 0;
890 }
891
892 static int usbduxsigma_ao_cmd(struct comedi_device *dev,
893 struct comedi_subdevice *s)
894 {
895 struct usbduxsigma_private *devpriv = dev->private;
896 struct comedi_cmd *cmd = &s->async->cmd;
897 int ret;
898
899 mutex_lock(&devpriv->mut);
900
901 /*
902 * For now, only "scan" timing is supported. A future version may
903 * support "convert" timing in high speed mode.
904 *
905 * Timing of the scan: every 1ms all channels updated at once.
906 */
907 devpriv->ao_timer = cmd->scan_begin_arg / 1000000;
908
909 devpriv->ao_counter = devpriv->ao_timer;
910
911 if (cmd->start_src == TRIG_NOW) {
912 /* enable this acquisition operation */
913 devpriv->ao_cmd_running = 1;
914 ret = usbduxsigma_submit_urbs(dev, devpriv->ao_urbs,
915 devpriv->n_ao_urbs, 0);
916 if (ret < 0) {
917 devpriv->ao_cmd_running = 0;
918 mutex_unlock(&devpriv->mut);
919 return ret;
920 }
921 s->async->inttrig = NULL;
922 } else { /* TRIG_INT */
923 s->async->inttrig = usbduxsigma_ao_inttrig;
924 }
925
926 mutex_unlock(&devpriv->mut);
927
928 return 0;
929 }
930
931 static int usbduxsigma_dio_insn_config(struct comedi_device *dev,
932 struct comedi_subdevice *s,
933 struct comedi_insn *insn,
934 unsigned int *data)
935 {
936 int ret;
937
938 ret = comedi_dio_insn_config(dev, s, insn, data, 0);
939 if (ret)
940 return ret;
941
942 /*
943 * We don't tell the firmware here as it would take 8 frames
944 * to submit the information. We do it in the (*insn_bits).
945 */
946 return insn->n;
947 }
948
949 static int usbduxsigma_dio_insn_bits(struct comedi_device *dev,
950 struct comedi_subdevice *s,
951 struct comedi_insn *insn,
952 unsigned int *data)
953 {
954 struct usbduxsigma_private *devpriv = dev->private;
955 int ret;
956
957 mutex_lock(&devpriv->mut);
958
959 comedi_dio_update_state(s, data);
960
961 /* Always update the hardware. See the (*insn_config). */
962 devpriv->dux_commands[1] = s->io_bits & 0xff;
963 devpriv->dux_commands[4] = s->state & 0xff;
964 devpriv->dux_commands[2] = (s->io_bits >> 8) & 0xff;
965 devpriv->dux_commands[5] = (s->state >> 8) & 0xff;
966 devpriv->dux_commands[3] = (s->io_bits >> 16) & 0xff;
967 devpriv->dux_commands[6] = (s->state >> 16) & 0xff;
968
969 ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_DIO_BITS_CMD);
970 if (ret < 0)
971 goto done;
972 ret = usbduxsigma_receive_cmd(dev, USBDUXSIGMA_DIO_BITS_CMD);
973 if (ret < 0)
974 goto done;
975
976 s->state = devpriv->insn_buf[1] |
977 (devpriv->insn_buf[2] << 8) |
978 (devpriv->insn_buf[3] << 16);
979
980 data[1] = s->state;
981 ret = insn->n;
982
983 done:
984 mutex_unlock(&devpriv->mut);
985
986 return ret;
987 }
988
989 static void usbduxsigma_pwm_stop(struct comedi_device *dev, int do_unlink)
990 {
991 struct usbduxsigma_private *devpriv = dev->private;
992
993 if (do_unlink) {
994 if (devpriv->pwm_urb)
995 usb_kill_urb(devpriv->pwm_urb);
996 }
997
998 devpriv->pwm_cmd_running = 0;
999 }
1000
1001 static int usbduxsigma_pwm_cancel(struct comedi_device *dev,
1002 struct comedi_subdevice *s)
1003 {
1004 struct usbduxsigma_private *devpriv = dev->private;
1005
1006 /* unlink only if it is really running */
1007 usbduxsigma_pwm_stop(dev, devpriv->pwm_cmd_running);
1008
1009 return usbbuxsigma_send_cmd(dev, USBDUXSIGMA_PWM_OFF_CMD);
1010 }
1011
1012 static void usbduxsigma_pwm_urb_complete(struct urb *urb)
1013 {
1014 struct comedi_device *dev = urb->context;
1015 struct usbduxsigma_private *devpriv = dev->private;
1016 int ret;
1017
1018 switch (urb->status) {
1019 case 0:
1020 /* success */
1021 break;
1022
1023 case -ECONNRESET:
1024 case -ENOENT:
1025 case -ESHUTDOWN:
1026 case -ECONNABORTED:
1027 /* happens after an unlink command */
1028 if (devpriv->pwm_cmd_running)
1029 usbduxsigma_pwm_stop(dev, 0); /* w/o unlink */
1030 return;
1031
1032 default:
1033 /* a real error */
1034 if (devpriv->pwm_cmd_running) {
1035 dev_err(dev->class_dev, "non-zero urb status (%d)\n",
1036 urb->status);
1037 usbduxsigma_pwm_stop(dev, 0); /* w/o unlink */
1038 }
1039 return;
1040 }
1041
1042 if (!devpriv->pwm_cmd_running)
1043 return;
1044
1045 urb->transfer_buffer_length = devpriv->pwm_buf_sz;
1046 urb->dev = comedi_to_usb_dev(dev);
1047 urb->status = 0;
1048 ret = usb_submit_urb(urb, GFP_ATOMIC);
1049 if (ret < 0) {
1050 dev_err(dev->class_dev, "urb resubmit failed (%d)\n", ret);
1051 if (ret == -EL2NSYNC)
1052 dev_err(dev->class_dev,
1053 "buggy USB host controller or bug in IRQ handler\n");
1054 usbduxsigma_pwm_stop(dev, 0); /* w/o unlink */
1055 }
1056 }
1057
1058 static int usbduxsigma_submit_pwm_urb(struct comedi_device *dev)
1059 {
1060 struct usb_device *usb = comedi_to_usb_dev(dev);
1061 struct usbduxsigma_private *devpriv = dev->private;
1062 struct urb *urb = devpriv->pwm_urb;
1063
1064 /* in case of a resubmission after an unlink... */
1065 usb_fill_bulk_urb(urb, usb, usb_sndbulkpipe(usb, 4),
1066 urb->transfer_buffer, devpriv->pwm_buf_sz,
1067 usbduxsigma_pwm_urb_complete, dev);
1068
1069 return usb_submit_urb(urb, GFP_ATOMIC);
1070 }
1071
1072 static int usbduxsigma_pwm_period(struct comedi_device *dev,
1073 struct comedi_subdevice *s,
1074 unsigned int period)
1075 {
1076 struct usbduxsigma_private *devpriv = dev->private;
1077 int fx2delay;
1078
1079 if (period < MIN_PWM_PERIOD)
1080 return -EAGAIN;
1081
1082 fx2delay = (period / (6 * 512 * 1000 / 33)) - 6;
1083 if (fx2delay > 255)
1084 return -EAGAIN;
1085
1086 devpriv->pwm_delay = fx2delay;
1087 devpriv->pwm_period = period;
1088 return 0;
1089 }
1090
1091 static int usbduxsigma_pwm_start(struct comedi_device *dev,
1092 struct comedi_subdevice *s)
1093 {
1094 struct usbduxsigma_private *devpriv = dev->private;
1095 int ret;
1096
1097 if (devpriv->pwm_cmd_running)
1098 return 0;
1099
1100 devpriv->dux_commands[1] = devpriv->pwm_delay;
1101 ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_PWM_ON_CMD);
1102 if (ret < 0)
1103 return ret;
1104
1105 memset(devpriv->pwm_urb->transfer_buffer, 0, devpriv->pwm_buf_sz);
1106
1107 devpriv->pwm_cmd_running = 1;
1108 ret = usbduxsigma_submit_pwm_urb(dev);
1109 if (ret < 0) {
1110 devpriv->pwm_cmd_running = 0;
1111 return ret;
1112 }
1113
1114 return 0;
1115 }
1116
1117 static void usbduxsigma_pwm_pattern(struct comedi_device *dev,
1118 struct comedi_subdevice *s,
1119 unsigned int chan,
1120 unsigned int value,
1121 unsigned int sign)
1122 {
1123 struct usbduxsigma_private *devpriv = dev->private;
1124 char pwm_mask = (1 << chan); /* DIO bit for the PWM data */
1125 char sgn_mask = (16 << chan); /* DIO bit for the sign */
1126 char *buf = (char *)(devpriv->pwm_urb->transfer_buffer);
1127 int szbuf = devpriv->pwm_buf_sz;
1128 int i;
1129
1130 for (i = 0; i < szbuf; i++) {
1131 char c = *buf;
1132
1133 c &= ~pwm_mask;
1134 if (i < value)
1135 c |= pwm_mask;
1136 if (!sign)
1137 c &= ~sgn_mask;
1138 else
1139 c |= sgn_mask;
1140 *buf++ = c;
1141 }
1142 }
1143
1144 static int usbduxsigma_pwm_write(struct comedi_device *dev,
1145 struct comedi_subdevice *s,
1146 struct comedi_insn *insn,
1147 unsigned int *data)
1148 {
1149 unsigned int chan = CR_CHAN(insn->chanspec);
1150
1151 /*
1152 * It doesn't make sense to support more than one value here
1153 * because it would just overwrite the PWM buffer.
1154 */
1155 if (insn->n != 1)
1156 return -EINVAL;
1157
1158 /*
1159 * The sign is set via a special INSN only, this gives us 8 bits
1160 * for normal operation, sign is 0 by default.
1161 */
1162 usbduxsigma_pwm_pattern(dev, s, chan, data[0], 0);
1163
1164 return insn->n;
1165 }
1166
1167 static int usbduxsigma_pwm_config(struct comedi_device *dev,
1168 struct comedi_subdevice *s,
1169 struct comedi_insn *insn,
1170 unsigned int *data)
1171 {
1172 struct usbduxsigma_private *devpriv = dev->private;
1173 unsigned int chan = CR_CHAN(insn->chanspec);
1174
1175 switch (data[0]) {
1176 case INSN_CONFIG_ARM:
1177 /*
1178 * if not zero the PWM is limited to a certain time which is
1179 * not supported here
1180 */
1181 if (data[1] != 0)
1182 return -EINVAL;
1183 return usbduxsigma_pwm_start(dev, s);
1184 case INSN_CONFIG_DISARM:
1185 return usbduxsigma_pwm_cancel(dev, s);
1186 case INSN_CONFIG_GET_PWM_STATUS:
1187 data[1] = devpriv->pwm_cmd_running;
1188 return 0;
1189 case INSN_CONFIG_PWM_SET_PERIOD:
1190 return usbduxsigma_pwm_period(dev, s, data[1]);
1191 case INSN_CONFIG_PWM_GET_PERIOD:
1192 data[1] = devpriv->pwm_period;
1193 return 0;
1194 case INSN_CONFIG_PWM_SET_H_BRIDGE:
1195 /*
1196 * data[1] = value
1197 * data[2] = sign (for a relay)
1198 */
1199 usbduxsigma_pwm_pattern(dev, s, chan, data[1], (data[2] != 0));
1200 return 0;
1201 case INSN_CONFIG_PWM_GET_H_BRIDGE:
1202 /* values are not kept in this driver, nothing to return */
1203 return -EINVAL;
1204 }
1205 return -EINVAL;
1206 }
1207
1208 static int usbduxsigma_getstatusinfo(struct comedi_device *dev, int chan)
1209 {
1210 struct comedi_subdevice *s = dev->read_subdev;
1211 struct usbduxsigma_private *devpriv = dev->private;
1212 u8 sysred;
1213 u32 val;
1214 int ret;
1215
1216 switch (chan) {
1217 default:
1218 case 0:
1219 sysred = 0; /* ADC zero */
1220 break;
1221 case 1:
1222 sysred = 1; /* ADC offset */
1223 break;
1224 case 2:
1225 sysred = 4; /* VCC */
1226 break;
1227 case 3:
1228 sysred = 8; /* temperature */
1229 break;
1230 case 4:
1231 sysred = 16; /* gain */
1232 break;
1233 case 5:
1234 sysred = 32; /* ref */
1235 break;
1236 }
1237
1238 devpriv->dux_commands[1] = 0x12; /* CONFIG0 */
1239 devpriv->dux_commands[2] = 0x80; /* CONFIG1: 2kHz sampling rate */
1240 devpriv->dux_commands[3] = 0x00; /* CONFIG3: diff. channels off */
1241 devpriv->dux_commands[4] = 0;
1242 devpriv->dux_commands[5] = 0;
1243 devpriv->dux_commands[6] = sysred;
1244 ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD);
1245 if (ret < 0)
1246 return ret;
1247
1248 ret = usbduxsigma_receive_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD);
1249 if (ret < 0)
1250 return ret;
1251
1252 /* 32 bits big endian from the A/D converter */
1253 val = be32_to_cpu(get_unaligned((__be32 *)(devpriv->insn_buf + 1)));
1254 val &= 0x00ffffff; /* strip status byte */
1255
1256 return (int)comedi_offset_munge(s, val);
1257 }
1258
1259 static int usbduxsigma_firmware_upload(struct comedi_device *dev,
1260 const u8 *data, size_t size,
1261 unsigned long context)
1262 {
1263 struct usb_device *usb = comedi_to_usb_dev(dev);
1264 u8 *buf;
1265 u8 *tmp;
1266 int ret;
1267
1268 if (!data)
1269 return 0;
1270
1271 if (size > FIRMWARE_MAX_LEN) {
1272 dev_err(dev->class_dev, "firmware binary too large for FX2\n");
1273 return -ENOMEM;
1274 }
1275
1276 /* we generate a local buffer for the firmware */
1277 buf = kmemdup(data, size, GFP_KERNEL);
1278 if (!buf)
1279 return -ENOMEM;
1280
1281 /* we need a malloc'ed buffer for usb_control_msg() */
1282 tmp = kmalloc(1, GFP_KERNEL);
1283 if (!tmp) {
1284 kfree(buf);
1285 return -ENOMEM;
1286 }
1287
1288 /* stop the current firmware on the device */
1289 *tmp = 1; /* 7f92 to one */
1290 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
1291 USBDUXSUB_FIRMWARE,
1292 VENDOR_DIR_OUT,
1293 USBDUXSUB_CPUCS, 0x0000,
1294 tmp, 1,
1295 BULK_TIMEOUT);
1296 if (ret < 0) {
1297 dev_err(dev->class_dev, "can not stop firmware\n");
1298 goto done;
1299 }
1300
1301 /* upload the new firmware to the device */
1302 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
1303 USBDUXSUB_FIRMWARE,
1304 VENDOR_DIR_OUT,
1305 0, 0x0000,
1306 buf, size,
1307 BULK_TIMEOUT);
1308 if (ret < 0) {
1309 dev_err(dev->class_dev, "firmware upload failed\n");
1310 goto done;
1311 }
1312
1313 /* start the new firmware on the device */
1314 *tmp = 0; /* 7f92 to zero */
1315 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
1316 USBDUXSUB_FIRMWARE,
1317 VENDOR_DIR_OUT,
1318 USBDUXSUB_CPUCS, 0x0000,
1319 tmp, 1,
1320 BULK_TIMEOUT);
1321 if (ret < 0)
1322 dev_err(dev->class_dev, "can not start firmware\n");
1323
1324 done:
1325 kfree(tmp);
1326 kfree(buf);
1327 return ret;
1328 }
1329
1330 static int usbduxsigma_alloc_usb_buffers(struct comedi_device *dev)
1331 {
1332 struct usb_device *usb = comedi_to_usb_dev(dev);
1333 struct usbduxsigma_private *devpriv = dev->private;
1334 struct urb *urb;
1335 int i;
1336
1337 devpriv->dux_commands = kzalloc(SIZEOFDUXBUFFER, GFP_KERNEL);
1338 devpriv->in_buf = kzalloc(SIZEINBUF, GFP_KERNEL);
1339 devpriv->insn_buf = kzalloc(SIZEINSNBUF, GFP_KERNEL);
1340 devpriv->ai_urbs = kcalloc(devpriv->n_ai_urbs, sizeof(urb), GFP_KERNEL);
1341 devpriv->ao_urbs = kcalloc(devpriv->n_ao_urbs, sizeof(urb), GFP_KERNEL);
1342 if (!devpriv->dux_commands || !devpriv->in_buf || !devpriv->insn_buf ||
1343 !devpriv->ai_urbs || !devpriv->ao_urbs)
1344 return -ENOMEM;
1345
1346 for (i = 0; i < devpriv->n_ai_urbs; i++) {
1347 /* one frame: 1ms */
1348 urb = usb_alloc_urb(1, GFP_KERNEL);
1349 if (!urb)
1350 return -ENOMEM;
1351 devpriv->ai_urbs[i] = urb;
1352 urb->dev = usb;
1353 /* will be filled later with a pointer to the comedi-device */
1354 /* and ONLY then the urb should be submitted */
1355 urb->context = NULL;
1356 urb->pipe = usb_rcvisocpipe(usb, 6);
1357 urb->transfer_flags = URB_ISO_ASAP;
1358 urb->transfer_buffer = kzalloc(SIZEINBUF, GFP_KERNEL);
1359 if (!urb->transfer_buffer)
1360 return -ENOMEM;
1361 urb->complete = usbduxsigma_ai_urb_complete;
1362 urb->number_of_packets = 1;
1363 urb->transfer_buffer_length = SIZEINBUF;
1364 urb->iso_frame_desc[0].offset = 0;
1365 urb->iso_frame_desc[0].length = SIZEINBUF;
1366 }
1367
1368 for (i = 0; i < devpriv->n_ao_urbs; i++) {
1369 /* one frame: 1ms */
1370 urb = usb_alloc_urb(1, GFP_KERNEL);
1371 if (!urb)
1372 return -ENOMEM;
1373 devpriv->ao_urbs[i] = urb;
1374 urb->dev = usb;
1375 /* will be filled later with a pointer to the comedi-device */
1376 /* and ONLY then the urb should be submitted */
1377 urb->context = NULL;
1378 urb->pipe = usb_sndisocpipe(usb, 2);
1379 urb->transfer_flags = URB_ISO_ASAP;
1380 urb->transfer_buffer = kzalloc(SIZEOUTBUF, GFP_KERNEL);
1381 if (!urb->transfer_buffer)
1382 return -ENOMEM;
1383 urb->complete = usbduxsigma_ao_urb_complete;
1384 urb->number_of_packets = 1;
1385 urb->transfer_buffer_length = SIZEOUTBUF;
1386 urb->iso_frame_desc[0].offset = 0;
1387 urb->iso_frame_desc[0].length = SIZEOUTBUF;
1388 urb->interval = 1; /* (u)frames */
1389 }
1390
1391 if (devpriv->pwm_buf_sz) {
1392 urb = usb_alloc_urb(0, GFP_KERNEL);
1393 if (!urb)
1394 return -ENOMEM;
1395 devpriv->pwm_urb = urb;
1396
1397 urb->transfer_buffer = kzalloc(devpriv->pwm_buf_sz,
1398 GFP_KERNEL);
1399 if (!urb->transfer_buffer)
1400 return -ENOMEM;
1401 }
1402
1403 return 0;
1404 }
1405
1406 static void usbduxsigma_free_usb_buffers(struct comedi_device *dev)
1407 {
1408 struct usbduxsigma_private *devpriv = dev->private;
1409 struct urb *urb;
1410 int i;
1411
1412 urb = devpriv->pwm_urb;
1413 if (urb) {
1414 kfree(urb->transfer_buffer);
1415 usb_free_urb(urb);
1416 }
1417 if (devpriv->ao_urbs) {
1418 for (i = 0; i < devpriv->n_ao_urbs; i++) {
1419 urb = devpriv->ao_urbs[i];
1420 if (urb) {
1421 kfree(urb->transfer_buffer);
1422 usb_free_urb(urb);
1423 }
1424 }
1425 kfree(devpriv->ao_urbs);
1426 }
1427 if (devpriv->ai_urbs) {
1428 for (i = 0; i < devpriv->n_ai_urbs; i++) {
1429 urb = devpriv->ai_urbs[i];
1430 if (urb) {
1431 kfree(urb->transfer_buffer);
1432 usb_free_urb(urb);
1433 }
1434 }
1435 kfree(devpriv->ai_urbs);
1436 }
1437 kfree(devpriv->insn_buf);
1438 kfree(devpriv->in_buf);
1439 kfree(devpriv->dux_commands);
1440 }
1441
1442 static int usbduxsigma_auto_attach(struct comedi_device *dev,
1443 unsigned long context_unused)
1444 {
1445 struct usb_interface *intf = comedi_to_usb_interface(dev);
1446 struct usb_device *usb = comedi_to_usb_dev(dev);
1447 struct usbduxsigma_private *devpriv;
1448 struct comedi_subdevice *s;
1449 int offset;
1450 int ret;
1451
1452 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
1453 if (!devpriv)
1454 return -ENOMEM;
1455
1456 mutex_init(&devpriv->mut);
1457
1458 usb_set_intfdata(intf, devpriv);
1459
1460 devpriv->high_speed = (usb->speed == USB_SPEED_HIGH);
1461 if (devpriv->high_speed) {
1462 devpriv->n_ai_urbs = NUMOFINBUFFERSHIGH;
1463 devpriv->n_ao_urbs = NUMOFOUTBUFFERSHIGH;
1464 devpriv->pwm_buf_sz = 512;
1465 } else {
1466 devpriv->n_ai_urbs = NUMOFINBUFFERSFULL;
1467 devpriv->n_ao_urbs = NUMOFOUTBUFFERSFULL;
1468 }
1469
1470 ret = usbduxsigma_alloc_usb_buffers(dev);
1471 if (ret)
1472 return ret;
1473
1474 /* setting to alternate setting 3: enabling iso ep and bulk ep. */
1475 ret = usb_set_interface(usb, intf->altsetting->desc.bInterfaceNumber,
1476 3);
1477 if (ret < 0) {
1478 dev_err(dev->class_dev,
1479 "could not set alternate setting 3 in high speed\n");
1480 return ret;
1481 }
1482
1483 ret = comedi_load_firmware(dev, &usb->dev, FIRMWARE,
1484 usbduxsigma_firmware_upload, 0);
1485 if (ret)
1486 return ret;
1487
1488 ret = comedi_alloc_subdevices(dev, (devpriv->high_speed) ? 4 : 3);
1489 if (ret)
1490 return ret;
1491
1492 /* Analog Input subdevice */
1493 s = &dev->subdevices[0];
1494 dev->read_subdev = s;
1495 s->type = COMEDI_SUBD_AI;
1496 s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ | SDF_LSAMPL;
1497 s->n_chan = NUMCHANNELS;
1498 s->len_chanlist = NUMCHANNELS;
1499 s->maxdata = 0x00ffffff;
1500 s->range_table = &usbduxsigma_ai_range;
1501 s->insn_read = usbduxsigma_ai_insn_read;
1502 s->do_cmdtest = usbduxsigma_ai_cmdtest;
1503 s->do_cmd = usbduxsigma_ai_cmd;
1504 s->cancel = usbduxsigma_ai_cancel;
1505
1506 /* Analog Output subdevice */
1507 s = &dev->subdevices[1];
1508 dev->write_subdev = s;
1509 s->type = COMEDI_SUBD_AO;
1510 s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_CMD_WRITE;
1511 s->n_chan = 4;
1512 s->len_chanlist = s->n_chan;
1513 s->maxdata = 0x00ff;
1514 s->range_table = &range_unipolar2_5;
1515 s->insn_write = usbduxsigma_ao_insn_write;
1516 s->insn_read = usbduxsigma_ao_insn_read;
1517 s->do_cmdtest = usbduxsigma_ao_cmdtest;
1518 s->do_cmd = usbduxsigma_ao_cmd;
1519 s->cancel = usbduxsigma_ao_cancel;
1520
1521 ret = comedi_alloc_subdev_readback(s);
1522 if (ret)
1523 return ret;
1524
1525 /* Digital I/O subdevice */
1526 s = &dev->subdevices[2];
1527 s->type = COMEDI_SUBD_DIO;
1528 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
1529 s->n_chan = 24;
1530 s->maxdata = 1;
1531 s->range_table = &range_digital;
1532 s->insn_bits = usbduxsigma_dio_insn_bits;
1533 s->insn_config = usbduxsigma_dio_insn_config;
1534
1535 if (devpriv->high_speed) {
1536 /* Timer / pwm subdevice */
1537 s = &dev->subdevices[3];
1538 s->type = COMEDI_SUBD_PWM;
1539 s->subdev_flags = SDF_WRITABLE | SDF_PWM_HBRIDGE;
1540 s->n_chan = 8;
1541 s->maxdata = devpriv->pwm_buf_sz;
1542 s->insn_write = usbduxsigma_pwm_write;
1543 s->insn_config = usbduxsigma_pwm_config;
1544
1545 usbduxsigma_pwm_period(dev, s, PWM_DEFAULT_PERIOD);
1546 }
1547
1548 offset = usbduxsigma_getstatusinfo(dev, 0);
1549 if (offset < 0) {
1550 dev_err(dev->class_dev,
1551 "Communication to USBDUXSIGMA failed! Check firmware and cabling.\n");
1552 return offset;
1553 }
1554
1555 dev_info(dev->class_dev, "ADC_zero = %x\n", offset);
1556
1557 return 0;
1558 }
1559
1560 static void usbduxsigma_detach(struct comedi_device *dev)
1561 {
1562 struct usb_interface *intf = comedi_to_usb_interface(dev);
1563 struct usbduxsigma_private *devpriv = dev->private;
1564
1565 usb_set_intfdata(intf, NULL);
1566
1567 if (!devpriv)
1568 return;
1569
1570 mutex_lock(&devpriv->mut);
1571
1572 /* force unlink all urbs */
1573 usbduxsigma_ai_stop(dev, 1);
1574 usbduxsigma_ao_stop(dev, 1);
1575 usbduxsigma_pwm_stop(dev, 1);
1576
1577 usbduxsigma_free_usb_buffers(dev);
1578
1579 mutex_unlock(&devpriv->mut);
1580
1581 mutex_destroy(&devpriv->mut);
1582 }
1583
1584 static struct comedi_driver usbduxsigma_driver = {
1585 .driver_name = "usbduxsigma",
1586 .module = THIS_MODULE,
1587 .auto_attach = usbduxsigma_auto_attach,
1588 .detach = usbduxsigma_detach,
1589 };
1590
1591 static int usbduxsigma_usb_probe(struct usb_interface *intf,
1592 const struct usb_device_id *id)
1593 {
1594 return comedi_usb_auto_config(intf, &usbduxsigma_driver, 0);
1595 }
1596
1597 static const struct usb_device_id usbduxsigma_usb_table[] = {
1598 { USB_DEVICE(0x13d8, 0x0020) },
1599 { USB_DEVICE(0x13d8, 0x0021) },
1600 { USB_DEVICE(0x13d8, 0x0022) },
1601 { }
1602 };
1603 MODULE_DEVICE_TABLE(usb, usbduxsigma_usb_table);
1604
1605 static struct usb_driver usbduxsigma_usb_driver = {
1606 .name = "usbduxsigma",
1607 .probe = usbduxsigma_usb_probe,
1608 .disconnect = comedi_usb_auto_unconfig,
1609 .id_table = usbduxsigma_usb_table,
1610 };
1611 module_comedi_usb_driver(usbduxsigma_driver, usbduxsigma_usb_driver);
1612
1613 MODULE_AUTHOR("Bernd Porr, mail@berndporr.me.uk");
1614 MODULE_DESCRIPTION("Stirling/ITL USB-DUX SIGMA -- mail@berndporr.me.uk");
1615 MODULE_LICENSE("GPL");
1616 MODULE_FIRMWARE(FIRMWARE);
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