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drm/panthor: Don't add write fences to the shared BOs
[drm/drm-misc.git] / drivers / comedi / drivers / usbdux.c
blob92d514b3c1c367c7d66de671787efc8f93531317
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * usbdux.c
4 * Copyright (C) 2003-2014 Bernd Porr, mail@berndporr.me.uk
5 */
6
7 /*
8 * Driver: usbdux
9 * Description: University of Stirling USB DAQ & INCITE Technology Limited
10 * Devices: [ITL] USB-DUX (usbdux)
11 * Author: Bernd Porr <mail@berndporr.me.uk>
12 * Updated: 10 Oct 2014
13 * Status: Stable
14 *
15 * Connection scheme for the counter at the digital port:
16 * 0=/CLK0, 1=UP/DOWN0, 2=RESET0, 4=/CLK1, 5=UP/DOWN1, 6=RESET1.
17 * The sampling rate of the counter is approximately 500Hz.
18 *
19 * Note that under USB2.0 the length of the channel list determines
20 * the max sampling rate. If you sample only one channel you get 8kHz
21 * sampling rate. If you sample two channels you get 4kHz and so on.
22 */
23
24 /*
25 * I must give credit here to Chris Baugher who
26 * wrote the driver for AT-MIO-16d. I used some parts of this
27 * driver. I also must give credits to David Brownell
28 * who supported me with the USB development.
29 *
30 * Bernd Porr
31 *
32 *
33 * Revision history:
34 * 0.94: D/A output should work now with any channel list combinations
35 * 0.95: .owner commented out for kernel vers below 2.4.19
36 * sanity checks in ai/ao_cmd
37 * 0.96: trying to get it working with 2.6, moved all memory alloc to comedi's
38 * attach final USB IDs
39 * moved memory allocation completely to the corresponding comedi
40 * functions firmware upload is by fxload and no longer by comedi (due to
41 * enumeration)
42 * 0.97: USB IDs received, adjusted table
43 * 0.98: SMP, locking, memory alloc: moved all usb memory alloc
44 * to the usb subsystem and moved all comedi related memory
45 * alloc to comedi.
46 * | kernel | registration | usbdux-usb | usbdux-comedi | comedi |
47 * 0.99: USB 2.0: changed protocol to isochronous transfer
48 * IRQ transfer is too buggy and too risky in 2.0
49 * for the high speed ISO transfer is now a working version
50 * available
51 * 0.99b: Increased the iso transfer buffer for high sp.to 10 buffers. Some VIA
52 * chipsets miss out IRQs. Deeper buffering is needed.
53 * 1.00: full USB 2.0 support for the A/D converter. Now: max 8kHz sampling
54 * rate.
55 * Firmware vers 1.00 is needed for this.
56 * Two 16 bit up/down/reset counter with a sampling rate of 1kHz
57 * And loads of cleaning up, in particular streamlining the
58 * bulk transfers.
59 * 1.1: moved EP4 transfers to EP1 to make space for a PWM output on EP4
60 * 1.2: added PWM support via EP4
61 * 2.0: PWM seems to be stable and is not interfering with the other functions
62 * 2.1: changed PWM API
63 * 2.2: added firmware kernel request to fix an udev problem
64 * 2.3: corrected a bug in bulk timeouts which were far too short
65 * 2.4: fixed a bug which causes the driver to hang when it ran out of data.
66 * Thanks to Jan-Matthias Braun and Ian to spot the bug and fix it.
67 *
68 */
69
70 #include <linux/kernel.h>
71 #include <linux/module.h>
72 #include <linux/slab.h>
73 #include <linux/input.h>
74 #include <linux/fcntl.h>
75 #include <linux/compiler.h>
76 #include <linux/comedi/comedi_usb.h>
77
78 /* constants for firmware upload and download */
79 #define USBDUX_FIRMWARE "usbdux_firmware.bin"
80 #define USBDUX_FIRMWARE_MAX_LEN 0x2000
81 #define USBDUX_FIRMWARE_CMD 0xa0
82 #define VENDOR_DIR_IN 0xc0
83 #define VENDOR_DIR_OUT 0x40
84 #define USBDUX_CPU_CS 0xe600
85
86 /* usbdux bulk transfer commands */
87 #define USBDUX_CMD_MULT_AI 0
88 #define USBDUX_CMD_AO 1
89 #define USBDUX_CMD_DIO_CFG 2
90 #define USBDUX_CMD_DIO_BITS 3
91 #define USBDUX_CMD_SINGLE_AI 4
92 #define USBDUX_CMD_TIMER_RD 5
93 #define USBDUX_CMD_TIMER_WR 6
94 #define USBDUX_CMD_PWM_ON 7
95 #define USBDUX_CMD_PWM_OFF 8
96
97 /* timeout for the USB-transfer in ms */
98 #define BULK_TIMEOUT 1000
99
100 /* 300Hz max frequ under PWM */
101 #define MIN_PWM_PERIOD ((long)(1E9 / 300))
102
103 /* Default PWM frequency */
104 #define PWM_DEFAULT_PERIOD ((long)(1E9 / 100))
105
106 /* Size of one A/D value */
107 #define SIZEADIN ((sizeof(u16)))
108
109 /*
110 * Size of the input-buffer IN BYTES
111 * Always multiple of 8 for 8 microframes which is needed in the highspeed mode
112 */
113 #define SIZEINBUF (8 * SIZEADIN)
114
115 /* 16 bytes. */
116 #define SIZEINSNBUF 16
117
118 /* size of one value for the D/A converter: channel and value */
119 #define SIZEDAOUT ((sizeof(u8) + sizeof(u16)))
120
121 /*
122 * Size of the output-buffer in bytes
123 * Actually only the first 4 triplets are used but for the
124 * high speed mode we need to pad it to 8 (microframes).
125 */
126 #define SIZEOUTBUF (8 * SIZEDAOUT)
127
128 /*
129 * Size of the buffer for the dux commands: just now max size is determined
130 * by the analogue out + command byte + panic bytes...
131 */
132 #define SIZEOFDUXBUFFER (8 * SIZEDAOUT + 2)
133
134 /* Number of in-URBs which receive the data: min=2 */
135 #define NUMOFINBUFFERSFULL 5
136
137 /* Number of out-URBs which send the data: min=2 */
138 #define NUMOFOUTBUFFERSFULL 5
139
140 /* Number of in-URBs which receive the data: min=5 */
141 /* must have more buffers due to buggy USB ctr */
142 #define NUMOFINBUFFERSHIGH 10
143
144 /* Number of out-URBs which send the data: min=5 */
145 /* must have more buffers due to buggy USB ctr */
146 #define NUMOFOUTBUFFERSHIGH 10
147
148 /* number of retries to get the right dux command */
149 #define RETRIES 10
150
151 static const struct comedi_lrange range_usbdux_ai_range = {
152 4, {
153 BIP_RANGE(4.096),
154 BIP_RANGE(4.096 / 2),
155 UNI_RANGE(4.096),
156 UNI_RANGE(4.096 / 2)
157 }
158 };
159
160 static const struct comedi_lrange range_usbdux_ao_range = {
161 2, {
162 BIP_RANGE(4.096),
163 UNI_RANGE(4.096)
164 }
165 };
166
167 struct usbdux_private {
168 /* actual number of in-buffers */
169 int n_ai_urbs;
170 /* actual number of out-buffers */
171 int n_ao_urbs;
172 /* ISO-transfer handling: buffers */
173 struct urb **ai_urbs;
174 struct urb **ao_urbs;
175 /* pwm-transfer handling */
176 struct urb *pwm_urb;
177 /* PWM period */
178 unsigned int pwm_period;
179 /* PWM internal delay for the GPIF in the FX2 */
180 u8 pwm_delay;
181 /* size of the PWM buffer which holds the bit pattern */
182 int pwm_buf_sz;
183 /* input buffer for the ISO-transfer */
184 __le16 *in_buf;
185 /* input buffer for single insn */
186 __le16 *insn_buf;
187
188 unsigned int high_speed:1;
189 unsigned int ai_cmd_running:1;
190 unsigned int ao_cmd_running:1;
191 unsigned int pwm_cmd_running:1;
192
193 /* time between samples in units of the timer */
194 unsigned int ai_timer;
195 unsigned int ao_timer;
196 /* counter between aquisitions */
197 unsigned int ai_counter;
198 unsigned int ao_counter;
199 /* interval in frames/uframes */
200 unsigned int ai_interval;
201 /* commands */
202 u8 *dux_commands;
203 struct mutex mut;
204 };
205
206 static void usbdux_unlink_urbs(struct urb **urbs, int num_urbs)
207 {
208 int i;
209
210 for (i = 0; i < num_urbs; i++)
211 usb_kill_urb(urbs[i]);
212 }
213
214 static void usbdux_ai_stop(struct comedi_device *dev, int do_unlink)
215 {
216 struct usbdux_private *devpriv = dev->private;
217
218 if (do_unlink && devpriv->ai_urbs)
219 usbdux_unlink_urbs(devpriv->ai_urbs, devpriv->n_ai_urbs);
220
221 devpriv->ai_cmd_running = 0;
222 }
223
224 static int usbdux_ai_cancel(struct comedi_device *dev,
225 struct comedi_subdevice *s)
226 {
227 struct usbdux_private *devpriv = dev->private;
228
229 /* prevent other CPUs from submitting new commands just now */
230 mutex_lock(&devpriv->mut);
231 /* unlink only if the urb really has been submitted */
232 usbdux_ai_stop(dev, devpriv->ai_cmd_running);
233 mutex_unlock(&devpriv->mut);
234
235 return 0;
236 }
237
238 static void usbduxsub_ai_handle_urb(struct comedi_device *dev,
239 struct comedi_subdevice *s,
240 struct urb *urb)
241 {
242 struct usbdux_private *devpriv = dev->private;
243 struct comedi_async *async = s->async;
244 struct comedi_cmd *cmd = &async->cmd;
245 int ret;
246 int i;
247
248 devpriv->ai_counter--;
249 if (devpriv->ai_counter == 0) {
250 devpriv->ai_counter = devpriv->ai_timer;
251
252 /* get the data from the USB bus and hand it over to comedi */
253 for (i = 0; i < cmd->chanlist_len; i++) {
254 unsigned int range = CR_RANGE(cmd->chanlist[i]);
255 u16 val = le16_to_cpu(devpriv->in_buf[i]);
256
257 /* bipolar data is two's-complement */
258 if (comedi_range_is_bipolar(s, range))
259 val = comedi_offset_munge(s, val);
260
261 /* transfer data */
262 if (!comedi_buf_write_samples(s, &val, 1))
263 return;
264 }
265
266 if (cmd->stop_src == TRIG_COUNT &&
267 async->scans_done >= cmd->stop_arg)
268 async->events |= COMEDI_CB_EOA;
269 }
270
271 /* if command is still running, resubmit urb */
272 if (!(async->events & COMEDI_CB_CANCEL_MASK)) {
273 urb->dev = comedi_to_usb_dev(dev);
274 ret = usb_submit_urb(urb, GFP_ATOMIC);
275 if (ret < 0) {
276 dev_err(dev->class_dev,
277 "urb resubmit failed in int-context! err=%d\n",
278 ret);
279 if (ret == -EL2NSYNC)
280 dev_err(dev->class_dev,
281 "buggy USB host controller or bug in IRQ handler!\n");
282 async->events |= COMEDI_CB_ERROR;
283 }
284 }
285 }
286
287 static void usbduxsub_ai_isoc_irq(struct urb *urb)
288 {
289 struct comedi_device *dev = urb->context;
290 struct comedi_subdevice *s = dev->read_subdev;
291 struct comedi_async *async = s->async;
292 struct usbdux_private *devpriv = dev->private;
293
294 /* exit if not running a command, do not resubmit urb */
295 if (!devpriv->ai_cmd_running)
296 return;
297
298 switch (urb->status) {
299 case 0:
300 /* copy the result in the transfer buffer */
301 memcpy(devpriv->in_buf, urb->transfer_buffer, SIZEINBUF);
302 usbduxsub_ai_handle_urb(dev, s, urb);
303 break;
304
305 case -EILSEQ:
306 /*
307 * error in the ISOchronous data
308 * we don't copy the data into the transfer buffer
309 * and recycle the last data byte
310 */
311 dev_dbg(dev->class_dev, "CRC error in ISO IN stream\n");
312 usbduxsub_ai_handle_urb(dev, s, urb);
313 break;
314
315 case -ECONNRESET:
316 case -ENOENT:
317 case -ESHUTDOWN:
318 case -ECONNABORTED:
319 /* after an unlink command, unplug, ... etc */
320 async->events |= COMEDI_CB_ERROR;
321 break;
322
323 default:
324 /* a real error */
325 dev_err(dev->class_dev,
326 "Non-zero urb status received in ai intr context: %d\n",
327 urb->status);
328 async->events |= COMEDI_CB_ERROR;
329 break;
330 }
331
332 /*
333 * comedi_handle_events() cannot be used in this driver. The (*cancel)
334 * operation would unlink the urb.
335 */
336 if (async->events & COMEDI_CB_CANCEL_MASK)
337 usbdux_ai_stop(dev, 0);
338
339 comedi_event(dev, s);
340 }
341
342 static void usbdux_ao_stop(struct comedi_device *dev, int do_unlink)
343 {
344 struct usbdux_private *devpriv = dev->private;
345
346 if (do_unlink && devpriv->ao_urbs)
347 usbdux_unlink_urbs(devpriv->ao_urbs, devpriv->n_ao_urbs);
348
349 devpriv->ao_cmd_running = 0;
350 }
351
352 static int usbdux_ao_cancel(struct comedi_device *dev,
353 struct comedi_subdevice *s)
354 {
355 struct usbdux_private *devpriv = dev->private;
356
357 /* prevent other CPUs from submitting a command just now */
358 mutex_lock(&devpriv->mut);
359 /* unlink only if it is really running */
360 usbdux_ao_stop(dev, devpriv->ao_cmd_running);
361 mutex_unlock(&devpriv->mut);
362
363 return 0;
364 }
365
366 static void usbduxsub_ao_handle_urb(struct comedi_device *dev,
367 struct comedi_subdevice *s,
368 struct urb *urb)
369 {
370 struct usbdux_private *devpriv = dev->private;
371 struct comedi_async *async = s->async;
372 struct comedi_cmd *cmd = &async->cmd;
373 u8 *datap;
374 int ret;
375 int i;
376
377 devpriv->ao_counter--;
378 if (devpriv->ao_counter == 0) {
379 devpriv->ao_counter = devpriv->ao_timer;
380
381 if (cmd->stop_src == TRIG_COUNT &&
382 async->scans_done >= cmd->stop_arg) {
383 async->events |= COMEDI_CB_EOA;
384 return;
385 }
386
387 /* transmit data to the USB bus */
388 datap = urb->transfer_buffer;
389 *datap++ = cmd->chanlist_len;
390 for (i = 0; i < cmd->chanlist_len; i++) {
391 unsigned int chan = CR_CHAN(cmd->chanlist[i]);
392 unsigned short val;
393
394 if (!comedi_buf_read_samples(s, &val, 1)) {
395 dev_err(dev->class_dev, "buffer underflow\n");
396 async->events |= COMEDI_CB_OVERFLOW;
397 return;
398 }
399
400 /* pointer to the DA */
401 *datap++ = val & 0xff;
402 *datap++ = (val >> 8) & 0xff;
403 *datap++ = chan << 6;
404 s->readback[chan] = val;
405 }
406 }
407
408 /* if command is still running, resubmit urb for BULK transfer */
409 if (!(async->events & COMEDI_CB_CANCEL_MASK)) {
410 urb->transfer_buffer_length = SIZEOUTBUF;
411 urb->dev = comedi_to_usb_dev(dev);
412 urb->status = 0;
413 if (devpriv->high_speed)
414 urb->interval = 8; /* uframes */
415 else
416 urb->interval = 1; /* frames */
417 urb->number_of_packets = 1;
418 urb->iso_frame_desc[0].offset = 0;
419 urb->iso_frame_desc[0].length = SIZEOUTBUF;
420 urb->iso_frame_desc[0].status = 0;
421 ret = usb_submit_urb(urb, GFP_ATOMIC);
422 if (ret < 0) {
423 dev_err(dev->class_dev,
424 "ao urb resubm failed in int-cont. ret=%d",
425 ret);
426 if (ret == -EL2NSYNC)
427 dev_err(dev->class_dev,
428 "buggy USB host controller or bug in IRQ handling!\n");
429 async->events |= COMEDI_CB_ERROR;
430 }
431 }
432 }
433
434 static void usbduxsub_ao_isoc_irq(struct urb *urb)
435 {
436 struct comedi_device *dev = urb->context;
437 struct comedi_subdevice *s = dev->write_subdev;
438 struct comedi_async *async = s->async;
439 struct usbdux_private *devpriv = dev->private;
440
441 /* exit if not running a command, do not resubmit urb */
442 if (!devpriv->ao_cmd_running)
443 return;
444
445 switch (urb->status) {
446 case 0:
447 usbduxsub_ao_handle_urb(dev, s, urb);
448 break;
449
450 case -ECONNRESET:
451 case -ENOENT:
452 case -ESHUTDOWN:
453 case -ECONNABORTED:
454 /* after an unlink command, unplug, ... etc */
455 async->events |= COMEDI_CB_ERROR;
456 break;
457
458 default:
459 /* a real error */
460 dev_err(dev->class_dev,
461 "Non-zero urb status received in ao intr context: %d\n",
462 urb->status);
463 async->events |= COMEDI_CB_ERROR;
464 break;
465 }
466
467 /*
468 * comedi_handle_events() cannot be used in this driver. The (*cancel)
469 * operation would unlink the urb.
470 */
471 if (async->events & COMEDI_CB_CANCEL_MASK)
472 usbdux_ao_stop(dev, 0);
473
474 comedi_event(dev, s);
475 }
476
477 static int usbdux_submit_urbs(struct comedi_device *dev,
478 struct urb **urbs, int num_urbs,
479 int input_urb)
480 {
481 struct usb_device *usb = comedi_to_usb_dev(dev);
482 struct usbdux_private *devpriv = dev->private;
483 struct urb *urb;
484 int ret;
485 int i;
486
487 /* Submit all URBs and start the transfer on the bus */
488 for (i = 0; i < num_urbs; i++) {
489 urb = urbs[i];
490
491 /* in case of a resubmission after an unlink... */
492 if (input_urb)
493 urb->interval = devpriv->ai_interval;
494 urb->context = dev;
495 urb->dev = usb;
496 urb->status = 0;
497 urb->transfer_flags = URB_ISO_ASAP;
498
499 ret = usb_submit_urb(urb, GFP_ATOMIC);
500 if (ret)
501 return ret;
502 }
503 return 0;
504 }
505
506 static int usbdux_ai_cmdtest(struct comedi_device *dev,
507 struct comedi_subdevice *s, struct comedi_cmd *cmd)
508 {
509 struct usbdux_private *devpriv = dev->private;
510 int err = 0;
511
512 /* Step 1 : check if triggers are trivially valid */
513
514 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
515 err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_TIMER);
516 err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW);
517 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
518 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
519
520 if (err)
521 return 1;
522
523 /* Step 2a : make sure trigger sources are unique */
524
525 err |= comedi_check_trigger_is_unique(cmd->start_src);
526 err |= comedi_check_trigger_is_unique(cmd->stop_src);
527
528 /* Step 2b : and mutually compatible */
529
530 if (err)
531 return 2;
532
533 /* Step 3: check if arguments are trivially valid */
534
535 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
536
537 if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */
538 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
539
540 if (cmd->scan_begin_src == TRIG_TIMER) {
541 /* full speed does 1kHz scans every USB frame */
542 unsigned int arg = 1000000;
543 unsigned int min_arg = arg;
544
545 if (devpriv->high_speed) {
546 /*
547 * In high speed mode microframes are possible.
548 * However, during one microframe we can roughly
549 * sample one channel. Thus, the more channels
550 * are in the channel list the more time we need.
551 */
552 int i = 1;
553
554 /* find a power of 2 for the number of channels */
555 while (i < cmd->chanlist_len)
556 i = i * 2;
557
558 arg /= 8;
559 min_arg = arg * i;
560 }
561 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
562 min_arg);
563 /* calc the real sampling rate with the rounding errors */
564 arg = (cmd->scan_begin_arg / arg) * arg;
565 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
566 }
567
568 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
569 cmd->chanlist_len);
570
571 if (cmd->stop_src == TRIG_COUNT)
572 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
573 else /* TRIG_NONE */
574 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
575
576 if (err)
577 return 3;
578
579 return 0;
580 }
581
582 /*
583 * creates the ADC command for the MAX1271
584 * range is the range value from comedi
585 */
586 static u8 create_adc_command(unsigned int chan, unsigned int range)
587 {
588 u8 p = (range <= 1);
589 u8 r = ((range % 2) == 0);
590
591 return (chan << 4) | ((p == 1) << 2) | ((r == 1) << 3);
592 }
593
594 static int send_dux_commands(struct comedi_device *dev, unsigned int cmd_type)
595 {
596 struct usb_device *usb = comedi_to_usb_dev(dev);
597 struct usbdux_private *devpriv = dev->private;
598 int nsent;
599
600 devpriv->dux_commands[0] = cmd_type;
601
602 return usb_bulk_msg(usb, usb_sndbulkpipe(usb, 1),
603 devpriv->dux_commands, SIZEOFDUXBUFFER,
604 &nsent, BULK_TIMEOUT);
605 }
606
607 static int receive_dux_commands(struct comedi_device *dev, unsigned int command)
608 {
609 struct usb_device *usb = comedi_to_usb_dev(dev);
610 struct usbdux_private *devpriv = dev->private;
611 int ret;
612 int nrec;
613 int i;
614
615 for (i = 0; i < RETRIES; i++) {
616 ret = usb_bulk_msg(usb, usb_rcvbulkpipe(usb, 8),
617 devpriv->insn_buf, SIZEINSNBUF,
618 &nrec, BULK_TIMEOUT);
619 if (ret < 0)
620 return ret;
621 if (le16_to_cpu(devpriv->insn_buf[0]) == command)
622 return ret;
623 }
624 /* command not received */
625 return -EFAULT;
626 }
627
628 static int usbdux_ai_inttrig(struct comedi_device *dev,
629 struct comedi_subdevice *s,
630 unsigned int trig_num)
631 {
632 struct usbdux_private *devpriv = dev->private;
633 struct comedi_cmd *cmd = &s->async->cmd;
634 int ret;
635
636 if (trig_num != cmd->start_arg)
637 return -EINVAL;
638
639 mutex_lock(&devpriv->mut);
640
641 if (!devpriv->ai_cmd_running) {
642 devpriv->ai_cmd_running = 1;
643 ret = usbdux_submit_urbs(dev, devpriv->ai_urbs,
644 devpriv->n_ai_urbs, 1);
645 if (ret < 0) {
646 devpriv->ai_cmd_running = 0;
647 goto ai_trig_exit;
648 }
649 s->async->inttrig = NULL;
650 } else {
651 ret = -EBUSY;
652 }
653
654 ai_trig_exit:
655 mutex_unlock(&devpriv->mut);
656 return ret;
657 }
658
659 static int usbdux_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
660 {
661 struct usbdux_private *devpriv = dev->private;
662 struct comedi_cmd *cmd = &s->async->cmd;
663 int len = cmd->chanlist_len;
664 int ret = -EBUSY;
665 int i;
666
667 /* block other CPUs from starting an ai_cmd */
668 mutex_lock(&devpriv->mut);
669
670 if (devpriv->ai_cmd_running)
671 goto ai_cmd_exit;
672
673 devpriv->dux_commands[1] = len;
674 for (i = 0; i < len; ++i) {
675 unsigned int chan = CR_CHAN(cmd->chanlist[i]);
676 unsigned int range = CR_RANGE(cmd->chanlist[i]);
677
678 devpriv->dux_commands[i + 2] = create_adc_command(chan, range);
679 }
680
681 ret = send_dux_commands(dev, USBDUX_CMD_MULT_AI);
682 if (ret < 0)
683 goto ai_cmd_exit;
684
685 if (devpriv->high_speed) {
686 /*
687 * every channel gets a time window of 125us. Thus, if we
688 * sample all 8 channels we need 1ms. If we sample only one
689 * channel we need only 125us
690 */
691 devpriv->ai_interval = 1;
692 /* find a power of 2 for the interval */
693 while (devpriv->ai_interval < len)
694 devpriv->ai_interval *= 2;
695
696 devpriv->ai_timer = cmd->scan_begin_arg /
697 (125000 * devpriv->ai_interval);
698 } else {
699 /* interval always 1ms */
700 devpriv->ai_interval = 1;
701 devpriv->ai_timer = cmd->scan_begin_arg / 1000000;
702 }
703 if (devpriv->ai_timer < 1) {
704 ret = -EINVAL;
705 goto ai_cmd_exit;
706 }
707
708 devpriv->ai_counter = devpriv->ai_timer;
709
710 if (cmd->start_src == TRIG_NOW) {
711 /* enable this acquisition operation */
712 devpriv->ai_cmd_running = 1;
713 ret = usbdux_submit_urbs(dev, devpriv->ai_urbs,
714 devpriv->n_ai_urbs, 1);
715 if (ret < 0) {
716 devpriv->ai_cmd_running = 0;
717 /* fixme: unlink here?? */
718 goto ai_cmd_exit;
719 }
720 s->async->inttrig = NULL;
721 } else {
722 /* TRIG_INT */
723 /* don't enable the acquision operation */
724 /* wait for an internal signal */
725 s->async->inttrig = usbdux_ai_inttrig;
726 }
727
728 ai_cmd_exit:
729 mutex_unlock(&devpriv->mut);
730
731 return ret;
732 }
733
734 /* Mode 0 is used to get a single conversion on demand */
735 static int usbdux_ai_insn_read(struct comedi_device *dev,
736 struct comedi_subdevice *s,
737 struct comedi_insn *insn,
738 unsigned int *data)
739 {
740 struct usbdux_private *devpriv = dev->private;
741 unsigned int chan = CR_CHAN(insn->chanspec);
742 unsigned int range = CR_RANGE(insn->chanspec);
743 unsigned int val;
744 int ret = -EBUSY;
745 int i;
746
747 mutex_lock(&devpriv->mut);
748
749 if (devpriv->ai_cmd_running)
750 goto ai_read_exit;
751
752 /* set command for the first channel */
753 devpriv->dux_commands[1] = create_adc_command(chan, range);
754
755 /* adc commands */
756 ret = send_dux_commands(dev, USBDUX_CMD_SINGLE_AI);
757 if (ret < 0)
758 goto ai_read_exit;
759
760 for (i = 0; i < insn->n; i++) {
761 ret = receive_dux_commands(dev, USBDUX_CMD_SINGLE_AI);
762 if (ret < 0)
763 goto ai_read_exit;
764
765 val = le16_to_cpu(devpriv->insn_buf[1]);
766
767 /* bipolar data is two's-complement */
768 if (comedi_range_is_bipolar(s, range))
769 val = comedi_offset_munge(s, val);
770
771 data[i] = val;
772 }
773
774 ai_read_exit:
775 mutex_unlock(&devpriv->mut);
776
777 return ret ? ret : insn->n;
778 }
779
780 static int usbdux_ao_insn_read(struct comedi_device *dev,
781 struct comedi_subdevice *s,
782 struct comedi_insn *insn,
783 unsigned int *data)
784 {
785 struct usbdux_private *devpriv = dev->private;
786 int ret;
787
788 mutex_lock(&devpriv->mut);
789 ret = comedi_readback_insn_read(dev, s, insn, data);
790 mutex_unlock(&devpriv->mut);
791
792 return ret;
793 }
794
795 static int usbdux_ao_insn_write(struct comedi_device *dev,
796 struct comedi_subdevice *s,
797 struct comedi_insn *insn,
798 unsigned int *data)
799 {
800 struct usbdux_private *devpriv = dev->private;
801 unsigned int chan = CR_CHAN(insn->chanspec);
802 __le16 *p = (__le16 *)&devpriv->dux_commands[2];
803 int ret = -EBUSY;
804 int i;
805
806 mutex_lock(&devpriv->mut);
807
808 if (devpriv->ao_cmd_running)
809 goto ao_write_exit;
810
811 /* number of channels: 1 */
812 devpriv->dux_commands[1] = 1;
813 /* channel number */
814 devpriv->dux_commands[4] = chan << 6;
815
816 for (i = 0; i < insn->n; i++) {
817 unsigned int val = data[i];
818
819 /* one 16 bit value */
820 *p = cpu_to_le16(val);
821
822 ret = send_dux_commands(dev, USBDUX_CMD_AO);
823 if (ret < 0)
824 goto ao_write_exit;
825
826 s->readback[chan] = val;
827 }
828
829 ao_write_exit:
830 mutex_unlock(&devpriv->mut);
831
832 return ret ? ret : insn->n;
833 }
834
835 static int usbdux_ao_inttrig(struct comedi_device *dev,
836 struct comedi_subdevice *s,
837 unsigned int trig_num)
838 {
839 struct usbdux_private *devpriv = dev->private;
840 struct comedi_cmd *cmd = &s->async->cmd;
841 int ret;
842
843 if (trig_num != cmd->start_arg)
844 return -EINVAL;
845
846 mutex_lock(&devpriv->mut);
847
848 if (!devpriv->ao_cmd_running) {
849 devpriv->ao_cmd_running = 1;
850 ret = usbdux_submit_urbs(dev, devpriv->ao_urbs,
851 devpriv->n_ao_urbs, 0);
852 if (ret < 0) {
853 devpriv->ao_cmd_running = 0;
854 goto ao_trig_exit;
855 }
856 s->async->inttrig = NULL;
857 } else {
858 ret = -EBUSY;
859 }
860
861 ao_trig_exit:
862 mutex_unlock(&devpriv->mut);
863 return ret;
864 }
865
866 static int usbdux_ao_cmdtest(struct comedi_device *dev,
867 struct comedi_subdevice *s, struct comedi_cmd *cmd)
868 {
869 int err = 0;
870 unsigned int flags;
871
872 /* Step 1 : check if triggers are trivially valid */
873
874 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
875
876 if (0) { /* (devpriv->high_speed) */
877 /* the sampling rate is set by the coversion rate */
878 flags = TRIG_FOLLOW;
879 } else {
880 /* start a new scan (output at once) with a timer */
881 flags = TRIG_TIMER;
882 }
883 err |= comedi_check_trigger_src(&cmd->scan_begin_src, flags);
884
885 if (0) { /* (devpriv->high_speed) */
886 /*
887 * in usb-2.0 only one conversion it transmitted
888 * but with 8kHz/n
889 */
890 flags = TRIG_TIMER;
891 } else {
892 /*
893 * all conversion events happen simultaneously with
894 * a rate of 1kHz/n
895 */
896 flags = TRIG_NOW;
897 }
898 err |= comedi_check_trigger_src(&cmd->convert_src, flags);
899
900 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
901 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
902
903 if (err)
904 return 1;
905
906 /* Step 2a : make sure trigger sources are unique */
907
908 err |= comedi_check_trigger_is_unique(cmd->start_src);
909 err |= comedi_check_trigger_is_unique(cmd->stop_src);
910
911 /* Step 2b : and mutually compatible */
912
913 if (err)
914 return 2;
915
916 /* Step 3: check if arguments are trivially valid */
917
918 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
919
920 if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */
921 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
922
923 if (cmd->scan_begin_src == TRIG_TIMER) {
924 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
925 1000000);
926 }
927
928 /* not used now, is for later use */
929 if (cmd->convert_src == TRIG_TIMER)
930 err |= comedi_check_trigger_arg_min(&cmd->convert_arg, 125000);
931
932 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
933 cmd->chanlist_len);
934
935 if (cmd->stop_src == TRIG_COUNT)
936 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
937 else /* TRIG_NONE */
938 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
939
940 if (err)
941 return 3;
942
943 return 0;
944 }
945
946 static int usbdux_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
947 {
948 struct usbdux_private *devpriv = dev->private;
949 struct comedi_cmd *cmd = &s->async->cmd;
950 int ret = -EBUSY;
951
952 mutex_lock(&devpriv->mut);
953
954 if (devpriv->ao_cmd_running)
955 goto ao_cmd_exit;
956
957 /* we count in steps of 1ms (125us) */
958 /* 125us mode not used yet */
959 if (0) { /* (devpriv->high_speed) */
960 /* 125us */
961 /* timing of the conversion itself: every 125 us */
962 devpriv->ao_timer = cmd->convert_arg / 125000;
963 } else {
964 /* 1ms */
965 /* timing of the scan: we get all channels at once */
966 devpriv->ao_timer = cmd->scan_begin_arg / 1000000;
967 if (devpriv->ao_timer < 1) {
968 ret = -EINVAL;
969 goto ao_cmd_exit;
970 }
971 }
972
973 devpriv->ao_counter = devpriv->ao_timer;
974
975 if (cmd->start_src == TRIG_NOW) {
976 /* enable this acquisition operation */
977 devpriv->ao_cmd_running = 1;
978 ret = usbdux_submit_urbs(dev, devpriv->ao_urbs,
979 devpriv->n_ao_urbs, 0);
980 if (ret < 0) {
981 devpriv->ao_cmd_running = 0;
982 /* fixme: unlink here?? */
983 goto ao_cmd_exit;
984 }
985 s->async->inttrig = NULL;
986 } else {
987 /* TRIG_INT */
988 /* submit the urbs later */
989 /* wait for an internal signal */
990 s->async->inttrig = usbdux_ao_inttrig;
991 }
992
993 ao_cmd_exit:
994 mutex_unlock(&devpriv->mut);
995
996 return ret;
997 }
998
999 static int usbdux_dio_insn_config(struct comedi_device *dev,
1000 struct comedi_subdevice *s,
1001 struct comedi_insn *insn,
1002 unsigned int *data)
1003 {
1004 int ret;
1005
1006 ret = comedi_dio_insn_config(dev, s, insn, data, 0);
1007 if (ret)
1008 return ret;
1009
1010 /*
1011 * We don't tell the firmware here as it would take 8 frames
1012 * to submit the information. We do it in the insn_bits.
1013 */
1014 return insn->n;
1015 }
1016
1017 static int usbdux_dio_insn_bits(struct comedi_device *dev,
1018 struct comedi_subdevice *s,
1019 struct comedi_insn *insn,
1020 unsigned int *data)
1021 {
1022 struct usbdux_private *devpriv = dev->private;
1023 int ret;
1024
1025 mutex_lock(&devpriv->mut);
1026
1027 comedi_dio_update_state(s, data);
1028
1029 /* Always update the hardware. See the (*insn_config). */
1030 devpriv->dux_commands[1] = s->io_bits;
1031 devpriv->dux_commands[2] = s->state;
1032
1033 /*
1034 * This command also tells the firmware to return
1035 * the digital input lines.
1036 */
1037 ret = send_dux_commands(dev, USBDUX_CMD_DIO_BITS);
1038 if (ret < 0)
1039 goto dio_exit;
1040 ret = receive_dux_commands(dev, USBDUX_CMD_DIO_BITS);
1041 if (ret < 0)
1042 goto dio_exit;
1043
1044 data[1] = le16_to_cpu(devpriv->insn_buf[1]);
1045
1046 dio_exit:
1047 mutex_unlock(&devpriv->mut);
1048
1049 return ret ? ret : insn->n;
1050 }
1051
1052 static int usbdux_counter_read(struct comedi_device *dev,
1053 struct comedi_subdevice *s,
1054 struct comedi_insn *insn,
1055 unsigned int *data)
1056 {
1057 struct usbdux_private *devpriv = dev->private;
1058 unsigned int chan = CR_CHAN(insn->chanspec);
1059 int ret = 0;
1060 int i;
1061
1062 mutex_lock(&devpriv->mut);
1063
1064 for (i = 0; i < insn->n; i++) {
1065 ret = send_dux_commands(dev, USBDUX_CMD_TIMER_RD);
1066 if (ret < 0)
1067 goto counter_read_exit;
1068 ret = receive_dux_commands(dev, USBDUX_CMD_TIMER_RD);
1069 if (ret < 0)
1070 goto counter_read_exit;
1071
1072 data[i] = le16_to_cpu(devpriv->insn_buf[chan + 1]);
1073 }
1074
1075 counter_read_exit:
1076 mutex_unlock(&devpriv->mut);
1077
1078 return ret ? ret : insn->n;
1079 }
1080
1081 static int usbdux_counter_write(struct comedi_device *dev,
1082 struct comedi_subdevice *s,
1083 struct comedi_insn *insn,
1084 unsigned int *data)
1085 {
1086 struct usbdux_private *devpriv = dev->private;
1087 unsigned int chan = CR_CHAN(insn->chanspec);
1088 __le16 *p = (__le16 *)&devpriv->dux_commands[2];
1089 int ret = 0;
1090 int i;
1091
1092 mutex_lock(&devpriv->mut);
1093
1094 devpriv->dux_commands[1] = chan;
1095
1096 for (i = 0; i < insn->n; i++) {
1097 *p = cpu_to_le16(data[i]);
1098
1099 ret = send_dux_commands(dev, USBDUX_CMD_TIMER_WR);
1100 if (ret < 0)
1101 break;
1102 }
1103
1104 mutex_unlock(&devpriv->mut);
1105
1106 return ret ? ret : insn->n;
1107 }
1108
1109 static int usbdux_counter_config(struct comedi_device *dev,
1110 struct comedi_subdevice *s,
1111 struct comedi_insn *insn, unsigned int *data)
1112 {
1113 /* nothing to do so far */
1114 return 2;
1115 }
1116
1117 static void usbduxsub_unlink_pwm_urbs(struct comedi_device *dev)
1118 {
1119 struct usbdux_private *devpriv = dev->private;
1120
1121 usb_kill_urb(devpriv->pwm_urb);
1122 }
1123
1124 static void usbdux_pwm_stop(struct comedi_device *dev, int do_unlink)
1125 {
1126 struct usbdux_private *devpriv = dev->private;
1127
1128 if (do_unlink)
1129 usbduxsub_unlink_pwm_urbs(dev);
1130
1131 devpriv->pwm_cmd_running = 0;
1132 }
1133
1134 static int usbdux_pwm_cancel(struct comedi_device *dev,
1135 struct comedi_subdevice *s)
1136 {
1137 struct usbdux_private *devpriv = dev->private;
1138 int ret;
1139
1140 mutex_lock(&devpriv->mut);
1141 /* unlink only if it is really running */
1142 usbdux_pwm_stop(dev, devpriv->pwm_cmd_running);
1143 ret = send_dux_commands(dev, USBDUX_CMD_PWM_OFF);
1144 mutex_unlock(&devpriv->mut);
1145
1146 return ret;
1147 }
1148
1149 static void usbduxsub_pwm_irq(struct urb *urb)
1150 {
1151 struct comedi_device *dev = urb->context;
1152 struct usbdux_private *devpriv = dev->private;
1153 int ret;
1154
1155 switch (urb->status) {
1156 case 0:
1157 /* success */
1158 break;
1159
1160 case -ECONNRESET:
1161 case -ENOENT:
1162 case -ESHUTDOWN:
1163 case -ECONNABORTED:
1164 /*
1165 * after an unlink command, unplug, ... etc
1166 * no unlink needed here. Already shutting down.
1167 */
1168 if (devpriv->pwm_cmd_running)
1169 usbdux_pwm_stop(dev, 0);
1170
1171 return;
1172
1173 default:
1174 /* a real error */
1175 if (devpriv->pwm_cmd_running) {
1176 dev_err(dev->class_dev,
1177 "Non-zero urb status received in pwm intr context: %d\n",
1178 urb->status);
1179 usbdux_pwm_stop(dev, 0);
1180 }
1181 return;
1182 }
1183
1184 /* are we actually running? */
1185 if (!devpriv->pwm_cmd_running)
1186 return;
1187
1188 urb->transfer_buffer_length = devpriv->pwm_buf_sz;
1189 urb->dev = comedi_to_usb_dev(dev);
1190 urb->status = 0;
1191 if (devpriv->pwm_cmd_running) {
1192 ret = usb_submit_urb(urb, GFP_ATOMIC);
1193 if (ret < 0) {
1194 dev_err(dev->class_dev,
1195 "pwm urb resubm failed in int-cont. ret=%d",
1196 ret);
1197 if (ret == -EL2NSYNC)
1198 dev_err(dev->class_dev,
1199 "buggy USB host controller or bug in IRQ handling!\n");
1200
1201 /* don't do an unlink here */
1202 usbdux_pwm_stop(dev, 0);
1203 }
1204 }
1205 }
1206
1207 static int usbduxsub_submit_pwm_urbs(struct comedi_device *dev)
1208 {
1209 struct usb_device *usb = comedi_to_usb_dev(dev);
1210 struct usbdux_private *devpriv = dev->private;
1211 struct urb *urb = devpriv->pwm_urb;
1212
1213 /* in case of a resubmission after an unlink... */
1214 usb_fill_bulk_urb(urb, usb, usb_sndbulkpipe(usb, 4),
1215 urb->transfer_buffer,
1216 devpriv->pwm_buf_sz,
1217 usbduxsub_pwm_irq,
1218 dev);
1219
1220 return usb_submit_urb(urb, GFP_ATOMIC);
1221 }
1222
1223 static int usbdux_pwm_period(struct comedi_device *dev,
1224 struct comedi_subdevice *s,
1225 unsigned int period)
1226 {
1227 struct usbdux_private *devpriv = dev->private;
1228 int fx2delay;
1229
1230 if (period < MIN_PWM_PERIOD)
1231 return -EAGAIN;
1232
1233 fx2delay = (period / (6 * 512 * 1000 / 33)) - 6;
1234 if (fx2delay > 255)
1235 return -EAGAIN;
1236
1237 devpriv->pwm_delay = fx2delay;
1238 devpriv->pwm_period = period;
1239
1240 return 0;
1241 }
1242
1243 static int usbdux_pwm_start(struct comedi_device *dev,
1244 struct comedi_subdevice *s)
1245 {
1246 struct usbdux_private *devpriv = dev->private;
1247 int ret = 0;
1248
1249 mutex_lock(&devpriv->mut);
1250
1251 if (devpriv->pwm_cmd_running)
1252 goto pwm_start_exit;
1253
1254 devpriv->dux_commands[1] = devpriv->pwm_delay;
1255 ret = send_dux_commands(dev, USBDUX_CMD_PWM_ON);
1256 if (ret < 0)
1257 goto pwm_start_exit;
1258
1259 /* initialise the buffer */
1260 memset(devpriv->pwm_urb->transfer_buffer, 0, devpriv->pwm_buf_sz);
1261
1262 devpriv->pwm_cmd_running = 1;
1263 ret = usbduxsub_submit_pwm_urbs(dev);
1264 if (ret < 0)
1265 devpriv->pwm_cmd_running = 0;
1266
1267 pwm_start_exit:
1268 mutex_unlock(&devpriv->mut);
1269
1270 return ret;
1271 }
1272
1273 static void usbdux_pwm_pattern(struct comedi_device *dev,
1274 struct comedi_subdevice *s,
1275 unsigned int chan,
1276 unsigned int value,
1277 unsigned int sign)
1278 {
1279 struct usbdux_private *devpriv = dev->private;
1280 char pwm_mask = (1 << chan); /* DIO bit for the PWM data */
1281 char sgn_mask = (16 << chan); /* DIO bit for the sign */
1282 char *buf = (char *)(devpriv->pwm_urb->transfer_buffer);
1283 int szbuf = devpriv->pwm_buf_sz;
1284 int i;
1285
1286 for (i = 0; i < szbuf; i++) {
1287 char c = *buf;
1288
1289 c &= ~pwm_mask;
1290 if (i < value)
1291 c |= pwm_mask;
1292 if (!sign)
1293 c &= ~sgn_mask;
1294 else
1295 c |= sgn_mask;
1296 *buf++ = c;
1297 }
1298 }
1299
1300 static int usbdux_pwm_write(struct comedi_device *dev,
1301 struct comedi_subdevice *s,
1302 struct comedi_insn *insn,
1303 unsigned int *data)
1304 {
1305 unsigned int chan = CR_CHAN(insn->chanspec);
1306
1307 /*
1308 * It doesn't make sense to support more than one value here
1309 * because it would just overwrite the PWM buffer.
1310 */
1311 if (insn->n != 1)
1312 return -EINVAL;
1313
1314 /*
1315 * The sign is set via a special INSN only, this gives us 8 bits
1316 * for normal operation, sign is 0 by default.
1317 */
1318 usbdux_pwm_pattern(dev, s, chan, data[0], 0);
1319
1320 return insn->n;
1321 }
1322
1323 static int usbdux_pwm_config(struct comedi_device *dev,
1324 struct comedi_subdevice *s,
1325 struct comedi_insn *insn,
1326 unsigned int *data)
1327 {
1328 struct usbdux_private *devpriv = dev->private;
1329 unsigned int chan = CR_CHAN(insn->chanspec);
1330
1331 switch (data[0]) {
1332 case INSN_CONFIG_ARM:
1333 /*
1334 * if not zero the PWM is limited to a certain time which is
1335 * not supported here
1336 */
1337 if (data[1] != 0)
1338 return -EINVAL;
1339 return usbdux_pwm_start(dev, s);
1340 case INSN_CONFIG_DISARM:
1341 return usbdux_pwm_cancel(dev, s);
1342 case INSN_CONFIG_GET_PWM_STATUS:
1343 data[1] = devpriv->pwm_cmd_running;
1344 return 0;
1345 case INSN_CONFIG_PWM_SET_PERIOD:
1346 return usbdux_pwm_period(dev, s, data[1]);
1347 case INSN_CONFIG_PWM_GET_PERIOD:
1348 data[1] = devpriv->pwm_period;
1349 return 0;
1350 case INSN_CONFIG_PWM_SET_H_BRIDGE:
1351 /*
1352 * data[1] = value
1353 * data[2] = sign (for a relay)
1354 */
1355 usbdux_pwm_pattern(dev, s, chan, data[1], (data[2] != 0));
1356 return 0;
1357 case INSN_CONFIG_PWM_GET_H_BRIDGE:
1358 /* values are not kept in this driver, nothing to return here */
1359 return -EINVAL;
1360 }
1361 return -EINVAL;
1362 }
1363
1364 static int usbdux_firmware_upload(struct comedi_device *dev,
1365 const u8 *data, size_t size,
1366 unsigned long context)
1367 {
1368 struct usb_device *usb = comedi_to_usb_dev(dev);
1369 u8 *buf;
1370 u8 *tmp;
1371 int ret;
1372
1373 if (!data)
1374 return 0;
1375
1376 if (size > USBDUX_FIRMWARE_MAX_LEN) {
1377 dev_err(dev->class_dev,
1378 "usbdux firmware binary it too large for FX2.\n");
1379 return -ENOMEM;
1380 }
1381
1382 /* we generate a local buffer for the firmware */
1383 buf = kmemdup(data, size, GFP_KERNEL);
1384 if (!buf)
1385 return -ENOMEM;
1386
1387 /* we need a malloc'ed buffer for usb_control_msg() */
1388 tmp = kmalloc(1, GFP_KERNEL);
1389 if (!tmp) {
1390 kfree(buf);
1391 return -ENOMEM;
1392 }
1393
1394 /* stop the current firmware on the device */
1395 *tmp = 1; /* 7f92 to one */
1396 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
1397 USBDUX_FIRMWARE_CMD,
1398 VENDOR_DIR_OUT,
1399 USBDUX_CPU_CS, 0x0000,
1400 tmp, 1,
1401 BULK_TIMEOUT);
1402 if (ret < 0) {
1403 dev_err(dev->class_dev, "can not stop firmware\n");
1404 goto done;
1405 }
1406
1407 /* upload the new firmware to the device */
1408 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
1409 USBDUX_FIRMWARE_CMD,
1410 VENDOR_DIR_OUT,
1411 0, 0x0000,
1412 buf, size,
1413 BULK_TIMEOUT);
1414 if (ret < 0) {
1415 dev_err(dev->class_dev, "firmware upload failed\n");
1416 goto done;
1417 }
1418
1419 /* start the new firmware on the device */
1420 *tmp = 0; /* 7f92 to zero */
1421 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
1422 USBDUX_FIRMWARE_CMD,
1423 VENDOR_DIR_OUT,
1424 USBDUX_CPU_CS, 0x0000,
1425 tmp, 1,
1426 BULK_TIMEOUT);
1427 if (ret < 0)
1428 dev_err(dev->class_dev, "can not start firmware\n");
1429
1430 done:
1431 kfree(tmp);
1432 kfree(buf);
1433 return ret;
1434 }
1435
1436 static int usbdux_alloc_usb_buffers(struct comedi_device *dev)
1437 {
1438 struct usb_device *usb = comedi_to_usb_dev(dev);
1439 struct usbdux_private *devpriv = dev->private;
1440 struct urb *urb;
1441 int i;
1442
1443 devpriv->dux_commands = kzalloc(SIZEOFDUXBUFFER, GFP_KERNEL);
1444 devpriv->in_buf = kzalloc(SIZEINBUF, GFP_KERNEL);
1445 devpriv->insn_buf = kzalloc(SIZEINSNBUF, GFP_KERNEL);
1446 devpriv->ai_urbs = kcalloc(devpriv->n_ai_urbs, sizeof(void *),
1447 GFP_KERNEL);
1448 devpriv->ao_urbs = kcalloc(devpriv->n_ao_urbs, sizeof(void *),
1449 GFP_KERNEL);
1450 if (!devpriv->dux_commands || !devpriv->in_buf || !devpriv->insn_buf ||
1451 !devpriv->ai_urbs || !devpriv->ao_urbs)
1452 return -ENOMEM;
1453
1454 for (i = 0; i < devpriv->n_ai_urbs; i++) {
1455 /* one frame: 1ms */
1456 urb = usb_alloc_urb(1, GFP_KERNEL);
1457 if (!urb)
1458 return -ENOMEM;
1459 devpriv->ai_urbs[i] = urb;
1460
1461 urb->dev = usb;
1462 urb->context = dev;
1463 urb->pipe = usb_rcvisocpipe(usb, 6);
1464 urb->transfer_flags = URB_ISO_ASAP;
1465 urb->transfer_buffer = kzalloc(SIZEINBUF, GFP_KERNEL);
1466 if (!urb->transfer_buffer)
1467 return -ENOMEM;
1468
1469 urb->complete = usbduxsub_ai_isoc_irq;
1470 urb->number_of_packets = 1;
1471 urb->transfer_buffer_length = SIZEINBUF;
1472 urb->iso_frame_desc[0].offset = 0;
1473 urb->iso_frame_desc[0].length = SIZEINBUF;
1474 }
1475
1476 for (i = 0; i < devpriv->n_ao_urbs; i++) {
1477 /* one frame: 1ms */
1478 urb = usb_alloc_urb(1, GFP_KERNEL);
1479 if (!urb)
1480 return -ENOMEM;
1481 devpriv->ao_urbs[i] = urb;
1482
1483 urb->dev = usb;
1484 urb->context = dev;
1485 urb->pipe = usb_sndisocpipe(usb, 2);
1486 urb->transfer_flags = URB_ISO_ASAP;
1487 urb->transfer_buffer = kzalloc(SIZEOUTBUF, GFP_KERNEL);
1488 if (!urb->transfer_buffer)
1489 return -ENOMEM;
1490
1491 urb->complete = usbduxsub_ao_isoc_irq;
1492 urb->number_of_packets = 1;
1493 urb->transfer_buffer_length = SIZEOUTBUF;
1494 urb->iso_frame_desc[0].offset = 0;
1495 urb->iso_frame_desc[0].length = SIZEOUTBUF;
1496 if (devpriv->high_speed)
1497 urb->interval = 8; /* uframes */
1498 else
1499 urb->interval = 1; /* frames */
1500 }
1501
1502 /* pwm */
1503 if (devpriv->pwm_buf_sz) {
1504 urb = usb_alloc_urb(0, GFP_KERNEL);
1505 if (!urb)
1506 return -ENOMEM;
1507 devpriv->pwm_urb = urb;
1508
1509 /* max bulk ep size in high speed */
1510 urb->transfer_buffer = kzalloc(devpriv->pwm_buf_sz,
1511 GFP_KERNEL);
1512 if (!urb->transfer_buffer)
1513 return -ENOMEM;
1514 }
1515
1516 return 0;
1517 }
1518
1519 static void usbdux_free_usb_buffers(struct comedi_device *dev)
1520 {
1521 struct usbdux_private *devpriv = dev->private;
1522 struct urb *urb;
1523 int i;
1524
1525 urb = devpriv->pwm_urb;
1526 if (urb) {
1527 kfree(urb->transfer_buffer);
1528 usb_free_urb(urb);
1529 }
1530 if (devpriv->ao_urbs) {
1531 for (i = 0; i < devpriv->n_ao_urbs; i++) {
1532 urb = devpriv->ao_urbs[i];
1533 if (urb) {
1534 kfree(urb->transfer_buffer);
1535 usb_free_urb(urb);
1536 }
1537 }
1538 kfree(devpriv->ao_urbs);
1539 }
1540 if (devpriv->ai_urbs) {
1541 for (i = 0; i < devpriv->n_ai_urbs; i++) {
1542 urb = devpriv->ai_urbs[i];
1543 if (urb) {
1544 kfree(urb->transfer_buffer);
1545 usb_free_urb(urb);
1546 }
1547 }
1548 kfree(devpriv->ai_urbs);
1549 }
1550 kfree(devpriv->insn_buf);
1551 kfree(devpriv->in_buf);
1552 kfree(devpriv->dux_commands);
1553 }
1554
1555 static int usbdux_auto_attach(struct comedi_device *dev,
1556 unsigned long context_unused)
1557 {
1558 struct usb_interface *intf = comedi_to_usb_interface(dev);
1559 struct usb_device *usb = comedi_to_usb_dev(dev);
1560 struct usbdux_private *devpriv;
1561 struct comedi_subdevice *s;
1562 int ret;
1563
1564 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
1565 if (!devpriv)
1566 return -ENOMEM;
1567
1568 mutex_init(&devpriv->mut);
1569
1570 usb_set_intfdata(intf, devpriv);
1571
1572 devpriv->high_speed = (usb->speed == USB_SPEED_HIGH);
1573 if (devpriv->high_speed) {
1574 devpriv->n_ai_urbs = NUMOFINBUFFERSHIGH;
1575 devpriv->n_ao_urbs = NUMOFOUTBUFFERSHIGH;
1576 devpriv->pwm_buf_sz = 512;
1577 } else {
1578 devpriv->n_ai_urbs = NUMOFINBUFFERSFULL;
1579 devpriv->n_ao_urbs = NUMOFOUTBUFFERSFULL;
1580 }
1581
1582 ret = usbdux_alloc_usb_buffers(dev);
1583 if (ret)
1584 return ret;
1585
1586 /* setting to alternate setting 3: enabling iso ep and bulk ep. */
1587 ret = usb_set_interface(usb, intf->altsetting->desc.bInterfaceNumber,
1588 3);
1589 if (ret < 0) {
1590 dev_err(dev->class_dev,
1591 "could not set alternate setting 3 in high speed\n");
1592 return ret;
1593 }
1594
1595 ret = comedi_load_firmware(dev, &usb->dev, USBDUX_FIRMWARE,
1596 usbdux_firmware_upload, 0);
1597 if (ret < 0)
1598 return ret;
1599
1600 ret = comedi_alloc_subdevices(dev, (devpriv->high_speed) ? 5 : 4);
1601 if (ret)
1602 return ret;
1603
1604 /* Analog Input subdevice */
1605 s = &dev->subdevices[0];
1606 dev->read_subdev = s;
1607 s->type = COMEDI_SUBD_AI;
1608 s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ;
1609 s->n_chan = 8;
1610 s->maxdata = 0x0fff;
1611 s->len_chanlist = 8;
1612 s->range_table = &range_usbdux_ai_range;
1613 s->insn_read = usbdux_ai_insn_read;
1614 s->do_cmdtest = usbdux_ai_cmdtest;
1615 s->do_cmd = usbdux_ai_cmd;
1616 s->cancel = usbdux_ai_cancel;
1617
1618 /* Analog Output subdevice */
1619 s = &dev->subdevices[1];
1620 dev->write_subdev = s;
1621 s->type = COMEDI_SUBD_AO;
1622 s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_CMD_WRITE;
1623 s->n_chan = 4;
1624 s->maxdata = 0x0fff;
1625 s->len_chanlist = s->n_chan;
1626 s->range_table = &range_usbdux_ao_range;
1627 s->do_cmdtest = usbdux_ao_cmdtest;
1628 s->do_cmd = usbdux_ao_cmd;
1629 s->cancel = usbdux_ao_cancel;
1630 s->insn_read = usbdux_ao_insn_read;
1631 s->insn_write = usbdux_ao_insn_write;
1632
1633 ret = comedi_alloc_subdev_readback(s);
1634 if (ret)
1635 return ret;
1636
1637 /* Digital I/O subdevice */
1638 s = &dev->subdevices[2];
1639 s->type = COMEDI_SUBD_DIO;
1640 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
1641 s->n_chan = 8;
1642 s->maxdata = 1;
1643 s->range_table = &range_digital;
1644 s->insn_bits = usbdux_dio_insn_bits;
1645 s->insn_config = usbdux_dio_insn_config;
1646
1647 /* Counter subdevice */
1648 s = &dev->subdevices[3];
1649 s->type = COMEDI_SUBD_COUNTER;
1650 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
1651 s->n_chan = 4;
1652 s->maxdata = 0xffff;
1653 s->insn_read = usbdux_counter_read;
1654 s->insn_write = usbdux_counter_write;
1655 s->insn_config = usbdux_counter_config;
1656
1657 if (devpriv->high_speed) {
1658 /* PWM subdevice */
1659 s = &dev->subdevices[4];
1660 s->type = COMEDI_SUBD_PWM;
1661 s->subdev_flags = SDF_WRITABLE | SDF_PWM_HBRIDGE;
1662 s->n_chan = 8;
1663 s->maxdata = devpriv->pwm_buf_sz;
1664 s->insn_write = usbdux_pwm_write;
1665 s->insn_config = usbdux_pwm_config;
1666
1667 usbdux_pwm_period(dev, s, PWM_DEFAULT_PERIOD);
1668 }
1669
1670 return 0;
1671 }
1672
1673 static void usbdux_detach(struct comedi_device *dev)
1674 {
1675 struct usb_interface *intf = comedi_to_usb_interface(dev);
1676 struct usbdux_private *devpriv = dev->private;
1677
1678 usb_set_intfdata(intf, NULL);
1679
1680 if (!devpriv)
1681 return;
1682
1683 mutex_lock(&devpriv->mut);
1684
1685 /* force unlink all urbs */
1686 usbdux_pwm_stop(dev, 1);
1687 usbdux_ao_stop(dev, 1);
1688 usbdux_ai_stop(dev, 1);
1689
1690 usbdux_free_usb_buffers(dev);
1691
1692 mutex_unlock(&devpriv->mut);
1693
1694 mutex_destroy(&devpriv->mut);
1695 }
1696
1697 static struct comedi_driver usbdux_driver = {
1698 .driver_name = "usbdux",
1699 .module = THIS_MODULE,
1700 .auto_attach = usbdux_auto_attach,
1701 .detach = usbdux_detach,
1702 };
1703
1704 static int usbdux_usb_probe(struct usb_interface *intf,
1705 const struct usb_device_id *id)
1706 {
1707 return comedi_usb_auto_config(intf, &usbdux_driver, 0);
1708 }
1709
1710 static const struct usb_device_id usbdux_usb_table[] = {
1711 { USB_DEVICE(0x13d8, 0x0001) },
1712 { USB_DEVICE(0x13d8, 0x0002) },
1713 { }
1714 };
1715 MODULE_DEVICE_TABLE(usb, usbdux_usb_table);
1716
1717 static struct usb_driver usbdux_usb_driver = {
1718 .name = "usbdux",
1719 .probe = usbdux_usb_probe,
1720 .disconnect = comedi_usb_auto_unconfig,
1721 .id_table = usbdux_usb_table,
1722 };
1723 module_comedi_usb_driver(usbdux_driver, usbdux_usb_driver);
1724
1725 MODULE_AUTHOR("Bernd Porr, BerndPorr@f2s.com");
1726 MODULE_DESCRIPTION("Stirling/ITL USB-DUX -- Bernd.Porr@f2s.com");
1727 MODULE_LICENSE("GPL");
1728 MODULE_FIRMWARE(USBDUX_FIRMWARE);
Kernel DRM miscellaneous fixes and cross-tree changes