1 // SPDX-License-Identifier: GPL-2.0+
4 * Copyright (C) 2003-2014 Bernd Porr, mail@berndporr.me.uk
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
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.
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.
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.
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
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
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
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
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
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.
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>
77 #include "../comedi_usb.h"
79 /* constants for firmware upload and download */
80 #define USBDUX_FIRMWARE "usbdux_firmware.bin"
81 #define USBDUX_FIRMWARE_MAX_LEN 0x2000
82 #define USBDUX_FIRMWARE_CMD 0xa0
83 #define VENDOR_DIR_IN 0xc0
84 #define VENDOR_DIR_OUT 0x40
85 #define USBDUX_CPU_CS 0xe600
87 /* usbdux bulk transfer commands */
88 #define USBDUX_CMD_MULT_AI 0
89 #define USBDUX_CMD_AO 1
90 #define USBDUX_CMD_DIO_CFG 2
91 #define USBDUX_CMD_DIO_BITS 3
92 #define USBDUX_CMD_SINGLE_AI 4
93 #define USBDUX_CMD_TIMER_RD 5
94 #define USBDUX_CMD_TIMER_WR 6
95 #define USBDUX_CMD_PWM_ON 7
96 #define USBDUX_CMD_PWM_OFF 8
98 /* timeout for the USB-transfer in ms */
99 #define BULK_TIMEOUT 1000
101 /* 300Hz max frequ under PWM */
102 #define MIN_PWM_PERIOD ((long)(1E9 / 300))
104 /* Default PWM frequency */
105 #define PWM_DEFAULT_PERIOD ((long)(1E9 / 100))
107 /* Size of one A/D value */
108 #define SIZEADIN ((sizeof(u16)))
111 * Size of the input-buffer IN BYTES
112 * Always multiple of 8 for 8 microframes which is needed in the highspeed mode
114 #define SIZEINBUF (8 * SIZEADIN)
117 #define SIZEINSNBUF 16
119 /* size of one value for the D/A converter: channel and value */
120 #define SIZEDAOUT ((sizeof(u8) + sizeof(u16)))
123 * Size of the output-buffer in bytes
124 * Actually only the first 4 triplets are used but for the
125 * high speed mode we need to pad it to 8 (microframes).
127 #define SIZEOUTBUF (8 * SIZEDAOUT)
130 * Size of the buffer for the dux commands: just now max size is determined
131 * by the analogue out + command byte + panic bytes...
133 #define SIZEOFDUXBUFFER (8 * SIZEDAOUT + 2)
135 /* Number of in-URBs which receive the data: min=2 */
136 #define NUMOFINBUFFERSFULL 5
138 /* Number of out-URBs which send the data: min=2 */
139 #define NUMOFOUTBUFFERSFULL 5
141 /* Number of in-URBs which receive the data: min=5 */
142 /* must have more buffers due to buggy USB ctr */
143 #define NUMOFINBUFFERSHIGH 10
145 /* Number of out-URBs which send the data: min=5 */
146 /* must have more buffers due to buggy USB ctr */
147 #define NUMOFOUTBUFFERSHIGH 10
149 /* number of retries to get the right dux command */
152 static const struct comedi_lrange range_usbdux_ai_range = {
155 BIP_RANGE(4.096 / 2),
161 static const struct comedi_lrange range_usbdux_ao_range = {
168 struct usbdux_private {
169 /* actual number of in-buffers */
171 /* actual number of out-buffers */
173 /* ISO-transfer handling: buffers */
174 struct urb **ai_urbs;
175 struct urb **ao_urbs;
176 /* pwm-transfer handling */
179 unsigned int pwm_period;
180 /* PWM internal delay for the GPIF in the FX2 */
182 /* size of the PWM buffer which holds the bit pattern */
184 /* input buffer for the ISO-transfer */
186 /* input buffer for single insn */
189 unsigned int high_speed:1;
190 unsigned int ai_cmd_running:1;
191 unsigned int ao_cmd_running:1;
192 unsigned int pwm_cmd_running:1;
194 /* time between samples in units of the timer */
195 unsigned int ai_timer;
196 unsigned int ao_timer;
197 /* counter between aquisitions */
198 unsigned int ai_counter;
199 unsigned int ao_counter;
200 /* interval in frames/uframes */
201 unsigned int ai_interval;
207 static void usbdux_unlink_urbs(struct urb **urbs, int num_urbs)
211 for (i = 0; i < num_urbs; i++)
212 usb_kill_urb(urbs[i]);
215 static void usbdux_ai_stop(struct comedi_device *dev, int do_unlink)
217 struct usbdux_private *devpriv = dev->private;
219 if (do_unlink && devpriv->ai_urbs)
220 usbdux_unlink_urbs(devpriv->ai_urbs, devpriv->n_ai_urbs);
222 devpriv->ai_cmd_running = 0;
225 static int usbdux_ai_cancel(struct comedi_device *dev,
226 struct comedi_subdevice *s)
228 struct usbdux_private *devpriv = dev->private;
230 /* prevent other CPUs from submitting new commands just now */
231 mutex_lock(&devpriv->mut);
232 /* unlink only if the urb really has been submitted */
233 usbdux_ai_stop(dev, devpriv->ai_cmd_running);
234 mutex_unlock(&devpriv->mut);
239 static void usbduxsub_ai_handle_urb(struct comedi_device *dev,
240 struct comedi_subdevice *s,
243 struct usbdux_private *devpriv = dev->private;
244 struct comedi_async *async = s->async;
245 struct comedi_cmd *cmd = &async->cmd;
249 devpriv->ai_counter--;
250 if (devpriv->ai_counter == 0) {
251 devpriv->ai_counter = devpriv->ai_timer;
253 /* get the data from the USB bus and hand it over to comedi */
254 for (i = 0; i < cmd->chanlist_len; i++) {
255 unsigned int range = CR_RANGE(cmd->chanlist[i]);
256 u16 val = le16_to_cpu(devpriv->in_buf[i]);
258 /* bipolar data is two's-complement */
259 if (comedi_range_is_bipolar(s, range))
260 val = comedi_offset_munge(s, val);
263 if (!comedi_buf_write_samples(s, &val, 1))
267 if (cmd->stop_src == TRIG_COUNT &&
268 async->scans_done >= cmd->stop_arg)
269 async->events |= COMEDI_CB_EOA;
272 /* if command is still running, resubmit urb */
273 if (!(async->events & COMEDI_CB_CANCEL_MASK)) {
274 urb->dev = comedi_to_usb_dev(dev);
275 ret = usb_submit_urb(urb, GFP_ATOMIC);
277 dev_err(dev->class_dev,
278 "urb resubmit failed in int-context! err=%d\n",
280 if (ret == -EL2NSYNC)
281 dev_err(dev->class_dev,
282 "buggy USB host controller or bug in IRQ handler!\n");
283 async->events |= COMEDI_CB_ERROR;
288 static void usbduxsub_ai_isoc_irq(struct urb *urb)
290 struct comedi_device *dev = urb->context;
291 struct comedi_subdevice *s = dev->read_subdev;
292 struct comedi_async *async = s->async;
293 struct usbdux_private *devpriv = dev->private;
295 /* exit if not running a command, do not resubmit urb */
296 if (!devpriv->ai_cmd_running)
299 switch (urb->status) {
301 /* copy the result in the transfer buffer */
302 memcpy(devpriv->in_buf, urb->transfer_buffer, SIZEINBUF);
303 usbduxsub_ai_handle_urb(dev, s, urb);
308 * error in the ISOchronous data
309 * we don't copy the data into the transfer buffer
310 * and recycle the last data byte
312 dev_dbg(dev->class_dev, "CRC error in ISO IN stream\n");
313 usbduxsub_ai_handle_urb(dev, s, urb);
320 /* after an unlink command, unplug, ... etc */
321 async->events |= COMEDI_CB_ERROR;
326 dev_err(dev->class_dev,
327 "Non-zero urb status received in ai intr context: %d\n",
329 async->events |= COMEDI_CB_ERROR;
334 * comedi_handle_events() cannot be used in this driver. The (*cancel)
335 * operation would unlink the urb.
337 if (async->events & COMEDI_CB_CANCEL_MASK)
338 usbdux_ai_stop(dev, 0);
340 comedi_event(dev, s);
343 static void usbdux_ao_stop(struct comedi_device *dev, int do_unlink)
345 struct usbdux_private *devpriv = dev->private;
347 if (do_unlink && devpriv->ao_urbs)
348 usbdux_unlink_urbs(devpriv->ao_urbs, devpriv->n_ao_urbs);
350 devpriv->ao_cmd_running = 0;
353 static int usbdux_ao_cancel(struct comedi_device *dev,
354 struct comedi_subdevice *s)
356 struct usbdux_private *devpriv = dev->private;
358 /* prevent other CPUs from submitting a command just now */
359 mutex_lock(&devpriv->mut);
360 /* unlink only if it is really running */
361 usbdux_ao_stop(dev, devpriv->ao_cmd_running);
362 mutex_unlock(&devpriv->mut);
367 static void usbduxsub_ao_handle_urb(struct comedi_device *dev,
368 struct comedi_subdevice *s,
371 struct usbdux_private *devpriv = dev->private;
372 struct comedi_async *async = s->async;
373 struct comedi_cmd *cmd = &async->cmd;
378 devpriv->ao_counter--;
379 if (devpriv->ao_counter == 0) {
380 devpriv->ao_counter = devpriv->ao_timer;
382 if (cmd->stop_src == TRIG_COUNT &&
383 async->scans_done >= cmd->stop_arg) {
384 async->events |= COMEDI_CB_EOA;
388 /* transmit data to the USB bus */
389 datap = urb->transfer_buffer;
390 *datap++ = cmd->chanlist_len;
391 for (i = 0; i < cmd->chanlist_len; i++) {
392 unsigned int chan = CR_CHAN(cmd->chanlist[i]);
395 if (!comedi_buf_read_samples(s, &val, 1)) {
396 dev_err(dev->class_dev, "buffer underflow\n");
397 async->events |= COMEDI_CB_OVERFLOW;
401 /* pointer to the DA */
402 *datap++ = val & 0xff;
403 *datap++ = (val >> 8) & 0xff;
404 *datap++ = chan << 6;
405 s->readback[chan] = val;
409 /* if command is still running, resubmit urb for BULK transfer */
410 if (!(async->events & COMEDI_CB_CANCEL_MASK)) {
411 urb->transfer_buffer_length = SIZEOUTBUF;
412 urb->dev = comedi_to_usb_dev(dev);
414 if (devpriv->high_speed)
415 urb->interval = 8; /* uframes */
417 urb->interval = 1; /* frames */
418 urb->number_of_packets = 1;
419 urb->iso_frame_desc[0].offset = 0;
420 urb->iso_frame_desc[0].length = SIZEOUTBUF;
421 urb->iso_frame_desc[0].status = 0;
422 ret = usb_submit_urb(urb, GFP_ATOMIC);
424 dev_err(dev->class_dev,
425 "ao urb resubm failed in int-cont. ret=%d",
427 if (ret == -EL2NSYNC)
428 dev_err(dev->class_dev,
429 "buggy USB host controller or bug in IRQ handling!\n");
430 async->events |= COMEDI_CB_ERROR;
435 static void usbduxsub_ao_isoc_irq(struct urb *urb)
437 struct comedi_device *dev = urb->context;
438 struct comedi_subdevice *s = dev->write_subdev;
439 struct comedi_async *async = s->async;
440 struct usbdux_private *devpriv = dev->private;
442 /* exit if not running a command, do not resubmit urb */
443 if (!devpriv->ao_cmd_running)
446 switch (urb->status) {
448 usbduxsub_ao_handle_urb(dev, s, urb);
455 /* after an unlink command, unplug, ... etc */
456 async->events |= COMEDI_CB_ERROR;
461 dev_err(dev->class_dev,
462 "Non-zero urb status received in ao intr context: %d\n",
464 async->events |= COMEDI_CB_ERROR;
469 * comedi_handle_events() cannot be used in this driver. The (*cancel)
470 * operation would unlink the urb.
472 if (async->events & COMEDI_CB_CANCEL_MASK)
473 usbdux_ao_stop(dev, 0);
475 comedi_event(dev, s);
478 static int usbdux_submit_urbs(struct comedi_device *dev,
479 struct urb **urbs, int num_urbs,
482 struct usb_device *usb = comedi_to_usb_dev(dev);
483 struct usbdux_private *devpriv = dev->private;
488 /* Submit all URBs and start the transfer on the bus */
489 for (i = 0; i < num_urbs; i++) {
492 /* in case of a resubmission after an unlink... */
494 urb->interval = devpriv->ai_interval;
498 urb->transfer_flags = URB_ISO_ASAP;
500 ret = usb_submit_urb(urb, GFP_ATOMIC);
507 static int usbdux_ai_cmdtest(struct comedi_device *dev,
508 struct comedi_subdevice *s, struct comedi_cmd *cmd)
510 struct usbdux_private *devpriv = dev->private;
513 /* Step 1 : check if triggers are trivially valid */
515 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
516 err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_TIMER);
517 err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW);
518 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
519 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
524 /* Step 2a : make sure trigger sources are unique */
526 err |= comedi_check_trigger_is_unique(cmd->start_src);
527 err |= comedi_check_trigger_is_unique(cmd->stop_src);
529 /* Step 2b : and mutually compatible */
534 /* Step 3: check if arguments are trivially valid */
536 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
538 if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */
539 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
541 if (cmd->scan_begin_src == TRIG_TIMER) {
542 /* full speed does 1kHz scans every USB frame */
543 unsigned int arg = 1000000;
544 unsigned int min_arg = arg;
546 if (devpriv->high_speed) {
548 * In high speed mode microframes are possible.
549 * However, during one microframe we can roughly
550 * sample one channel. Thus, the more channels
551 * are in the channel list the more time we need.
555 /* find a power of 2 for the number of channels */
556 while (i < cmd->chanlist_len)
562 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
564 /* calc the real sampling rate with the rounding errors */
565 arg = (cmd->scan_begin_arg / arg) * arg;
566 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
569 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
572 if (cmd->stop_src == TRIG_COUNT)
573 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
575 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
584 * creates the ADC command for the MAX1271
585 * range is the range value from comedi
587 static u8 create_adc_command(unsigned int chan, unsigned int range)
590 u8 r = ((range % 2) == 0);
592 return (chan << 4) | ((p == 1) << 2) | ((r == 1) << 3);
595 static int send_dux_commands(struct comedi_device *dev, unsigned int cmd_type)
597 struct usb_device *usb = comedi_to_usb_dev(dev);
598 struct usbdux_private *devpriv = dev->private;
601 devpriv->dux_commands[0] = cmd_type;
603 return usb_bulk_msg(usb, usb_sndbulkpipe(usb, 1),
604 devpriv->dux_commands, SIZEOFDUXBUFFER,
605 &nsent, BULK_TIMEOUT);
608 static int receive_dux_commands(struct comedi_device *dev, unsigned int command)
610 struct usb_device *usb = comedi_to_usb_dev(dev);
611 struct usbdux_private *devpriv = dev->private;
616 for (i = 0; i < RETRIES; i++) {
617 ret = usb_bulk_msg(usb, usb_rcvbulkpipe(usb, 8),
618 devpriv->insn_buf, SIZEINSNBUF,
619 &nrec, BULK_TIMEOUT);
622 if (le16_to_cpu(devpriv->insn_buf[0]) == command)
625 /* command not received */
629 static int usbdux_ai_inttrig(struct comedi_device *dev,
630 struct comedi_subdevice *s,
631 unsigned int trig_num)
633 struct usbdux_private *devpriv = dev->private;
634 struct comedi_cmd *cmd = &s->async->cmd;
637 if (trig_num != cmd->start_arg)
640 mutex_lock(&devpriv->mut);
642 if (!devpriv->ai_cmd_running) {
643 devpriv->ai_cmd_running = 1;
644 ret = usbdux_submit_urbs(dev, devpriv->ai_urbs,
645 devpriv->n_ai_urbs, 1);
647 devpriv->ai_cmd_running = 0;
650 s->async->inttrig = NULL;
656 mutex_unlock(&devpriv->mut);
660 static int usbdux_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
662 struct usbdux_private *devpriv = dev->private;
663 struct comedi_cmd *cmd = &s->async->cmd;
664 int len = cmd->chanlist_len;
668 /* block other CPUs from starting an ai_cmd */
669 mutex_lock(&devpriv->mut);
671 if (devpriv->ai_cmd_running)
674 devpriv->dux_commands[1] = len;
675 for (i = 0; i < len; ++i) {
676 unsigned int chan = CR_CHAN(cmd->chanlist[i]);
677 unsigned int range = CR_RANGE(cmd->chanlist[i]);
679 devpriv->dux_commands[i + 2] = create_adc_command(chan, range);
682 ret = send_dux_commands(dev, USBDUX_CMD_MULT_AI);
686 if (devpriv->high_speed) {
688 * every channel gets a time window of 125us. Thus, if we
689 * sample all 8 channels we need 1ms. If we sample only one
690 * channel we need only 125us
692 devpriv->ai_interval = 1;
693 /* find a power of 2 for the interval */
694 while (devpriv->ai_interval < len)
695 devpriv->ai_interval *= 2;
697 devpriv->ai_timer = cmd->scan_begin_arg /
698 (125000 * devpriv->ai_interval);
700 /* interval always 1ms */
701 devpriv->ai_interval = 1;
702 devpriv->ai_timer = cmd->scan_begin_arg / 1000000;
704 if (devpriv->ai_timer < 1) {
709 devpriv->ai_counter = devpriv->ai_timer;
711 if (cmd->start_src == TRIG_NOW) {
712 /* enable this acquisition operation */
713 devpriv->ai_cmd_running = 1;
714 ret = usbdux_submit_urbs(dev, devpriv->ai_urbs,
715 devpriv->n_ai_urbs, 1);
717 devpriv->ai_cmd_running = 0;
718 /* fixme: unlink here?? */
721 s->async->inttrig = NULL;
724 /* don't enable the acquision operation */
725 /* wait for an internal signal */
726 s->async->inttrig = usbdux_ai_inttrig;
730 mutex_unlock(&devpriv->mut);
735 /* Mode 0 is used to get a single conversion on demand */
736 static int usbdux_ai_insn_read(struct comedi_device *dev,
737 struct comedi_subdevice *s,
738 struct comedi_insn *insn,
741 struct usbdux_private *devpriv = dev->private;
742 unsigned int chan = CR_CHAN(insn->chanspec);
743 unsigned int range = CR_RANGE(insn->chanspec);
748 mutex_lock(&devpriv->mut);
750 if (devpriv->ai_cmd_running)
753 /* set command for the first channel */
754 devpriv->dux_commands[1] = create_adc_command(chan, range);
757 ret = send_dux_commands(dev, USBDUX_CMD_SINGLE_AI);
761 for (i = 0; i < insn->n; i++) {
762 ret = receive_dux_commands(dev, USBDUX_CMD_SINGLE_AI);
766 val = le16_to_cpu(devpriv->insn_buf[1]);
768 /* bipolar data is two's-complement */
769 if (comedi_range_is_bipolar(s, range))
770 val = comedi_offset_munge(s, val);
776 mutex_unlock(&devpriv->mut);
778 return ret ? ret : insn->n;
781 static int usbdux_ao_insn_read(struct comedi_device *dev,
782 struct comedi_subdevice *s,
783 struct comedi_insn *insn,
786 struct usbdux_private *devpriv = dev->private;
789 mutex_lock(&devpriv->mut);
790 ret = comedi_readback_insn_read(dev, s, insn, data);
791 mutex_unlock(&devpriv->mut);
796 static int usbdux_ao_insn_write(struct comedi_device *dev,
797 struct comedi_subdevice *s,
798 struct comedi_insn *insn,
801 struct usbdux_private *devpriv = dev->private;
802 unsigned int chan = CR_CHAN(insn->chanspec);
803 __le16 *p = (__le16 *)&devpriv->dux_commands[2];
807 mutex_lock(&devpriv->mut);
809 if (devpriv->ao_cmd_running)
812 /* number of channels: 1 */
813 devpriv->dux_commands[1] = 1;
815 devpriv->dux_commands[4] = chan << 6;
817 for (i = 0; i < insn->n; i++) {
818 unsigned int val = data[i];
820 /* one 16 bit value */
821 *p = cpu_to_le16(val);
823 ret = send_dux_commands(dev, USBDUX_CMD_AO);
827 s->readback[chan] = val;
831 mutex_unlock(&devpriv->mut);
833 return ret ? ret : insn->n;
836 static int usbdux_ao_inttrig(struct comedi_device *dev,
837 struct comedi_subdevice *s,
838 unsigned int trig_num)
840 struct usbdux_private *devpriv = dev->private;
841 struct comedi_cmd *cmd = &s->async->cmd;
844 if (trig_num != cmd->start_arg)
847 mutex_lock(&devpriv->mut);
849 if (!devpriv->ao_cmd_running) {
850 devpriv->ao_cmd_running = 1;
851 ret = usbdux_submit_urbs(dev, devpriv->ao_urbs,
852 devpriv->n_ao_urbs, 0);
854 devpriv->ao_cmd_running = 0;
857 s->async->inttrig = NULL;
863 mutex_unlock(&devpriv->mut);
867 static int usbdux_ao_cmdtest(struct comedi_device *dev,
868 struct comedi_subdevice *s, struct comedi_cmd *cmd)
873 /* Step 1 : check if triggers are trivially valid */
875 err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
877 if (0) { /* (devpriv->high_speed) */
878 /* the sampling rate is set by the coversion rate */
881 /* start a new scan (output at once) with a timer */
884 err |= comedi_check_trigger_src(&cmd->scan_begin_src, flags);
886 if (0) { /* (devpriv->high_speed) */
888 * in usb-2.0 only one conversion it transmitted
894 * all conversion events happen simultaneously with
899 err |= comedi_check_trigger_src(&cmd->convert_src, flags);
901 err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
902 err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
907 /* Step 2a : make sure trigger sources are unique */
909 err |= comedi_check_trigger_is_unique(cmd->start_src);
910 err |= comedi_check_trigger_is_unique(cmd->stop_src);
912 /* Step 2b : and mutually compatible */
917 /* Step 3: check if arguments are trivially valid */
919 err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
921 if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */
922 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
924 if (cmd->scan_begin_src == TRIG_TIMER) {
925 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
929 /* not used now, is for later use */
930 if (cmd->convert_src == TRIG_TIMER)
931 err |= comedi_check_trigger_arg_min(&cmd->convert_arg, 125000);
933 err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
936 if (cmd->stop_src == TRIG_COUNT)
937 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
939 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
947 static int usbdux_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
949 struct usbdux_private *devpriv = dev->private;
950 struct comedi_cmd *cmd = &s->async->cmd;
953 mutex_lock(&devpriv->mut);
955 if (devpriv->ao_cmd_running)
958 /* we count in steps of 1ms (125us) */
959 /* 125us mode not used yet */
960 if (0) { /* (devpriv->high_speed) */
962 /* timing of the conversion itself: every 125 us */
963 devpriv->ao_timer = cmd->convert_arg / 125000;
966 /* timing of the scan: we get all channels at once */
967 devpriv->ao_timer = cmd->scan_begin_arg / 1000000;
968 if (devpriv->ao_timer < 1) {
974 devpriv->ao_counter = devpriv->ao_timer;
976 if (cmd->start_src == TRIG_NOW) {
977 /* enable this acquisition operation */
978 devpriv->ao_cmd_running = 1;
979 ret = usbdux_submit_urbs(dev, devpriv->ao_urbs,
980 devpriv->n_ao_urbs, 0);
982 devpriv->ao_cmd_running = 0;
983 /* fixme: unlink here?? */
986 s->async->inttrig = NULL;
989 /* submit the urbs later */
990 /* wait for an internal signal */
991 s->async->inttrig = usbdux_ao_inttrig;
995 mutex_unlock(&devpriv->mut);
1000 static int usbdux_dio_insn_config(struct comedi_device *dev,
1001 struct comedi_subdevice *s,
1002 struct comedi_insn *insn,
1007 ret = comedi_dio_insn_config(dev, s, insn, data, 0);
1012 * We don't tell the firmware here as it would take 8 frames
1013 * to submit the information. We do it in the insn_bits.
1018 static int usbdux_dio_insn_bits(struct comedi_device *dev,
1019 struct comedi_subdevice *s,
1020 struct comedi_insn *insn,
1023 struct usbdux_private *devpriv = dev->private;
1026 mutex_lock(&devpriv->mut);
1028 comedi_dio_update_state(s, data);
1030 /* Always update the hardware. See the (*insn_config). */
1031 devpriv->dux_commands[1] = s->io_bits;
1032 devpriv->dux_commands[2] = s->state;
1035 * This command also tells the firmware to return
1036 * the digital input lines.
1038 ret = send_dux_commands(dev, USBDUX_CMD_DIO_BITS);
1041 ret = receive_dux_commands(dev, USBDUX_CMD_DIO_BITS);
1045 data[1] = le16_to_cpu(devpriv->insn_buf[1]);
1048 mutex_unlock(&devpriv->mut);
1050 return ret ? ret : insn->n;
1053 static int usbdux_counter_read(struct comedi_device *dev,
1054 struct comedi_subdevice *s,
1055 struct comedi_insn *insn,
1058 struct usbdux_private *devpriv = dev->private;
1059 unsigned int chan = CR_CHAN(insn->chanspec);
1063 mutex_lock(&devpriv->mut);
1065 for (i = 0; i < insn->n; i++) {
1066 ret = send_dux_commands(dev, USBDUX_CMD_TIMER_RD);
1068 goto counter_read_exit;
1069 ret = receive_dux_commands(dev, USBDUX_CMD_TIMER_RD);
1071 goto counter_read_exit;
1073 data[i] = le16_to_cpu(devpriv->insn_buf[chan + 1]);
1077 mutex_unlock(&devpriv->mut);
1079 return ret ? ret : insn->n;
1082 static int usbdux_counter_write(struct comedi_device *dev,
1083 struct comedi_subdevice *s,
1084 struct comedi_insn *insn,
1087 struct usbdux_private *devpriv = dev->private;
1088 unsigned int chan = CR_CHAN(insn->chanspec);
1089 __le16 *p = (__le16 *)&devpriv->dux_commands[2];
1093 mutex_lock(&devpriv->mut);
1095 devpriv->dux_commands[1] = chan;
1097 for (i = 0; i < insn->n; i++) {
1098 *p = cpu_to_le16(data[i]);
1100 ret = send_dux_commands(dev, USBDUX_CMD_TIMER_WR);
1105 mutex_unlock(&devpriv->mut);
1107 return ret ? ret : insn->n;
1110 static int usbdux_counter_config(struct comedi_device *dev,
1111 struct comedi_subdevice *s,
1112 struct comedi_insn *insn, unsigned int *data)
1114 /* nothing to do so far */
1118 static void usbduxsub_unlink_pwm_urbs(struct comedi_device *dev)
1120 struct usbdux_private *devpriv = dev->private;
1122 usb_kill_urb(devpriv->pwm_urb);
1125 static void usbdux_pwm_stop(struct comedi_device *dev, int do_unlink)
1127 struct usbdux_private *devpriv = dev->private;
1130 usbduxsub_unlink_pwm_urbs(dev);
1132 devpriv->pwm_cmd_running = 0;
1135 static int usbdux_pwm_cancel(struct comedi_device *dev,
1136 struct comedi_subdevice *s)
1138 struct usbdux_private *devpriv = dev->private;
1141 mutex_lock(&devpriv->mut);
1142 /* unlink only if it is really running */
1143 usbdux_pwm_stop(dev, devpriv->pwm_cmd_running);
1144 ret = send_dux_commands(dev, USBDUX_CMD_PWM_OFF);
1145 mutex_unlock(&devpriv->mut);
1150 static void usbduxsub_pwm_irq(struct urb *urb)
1152 struct comedi_device *dev = urb->context;
1153 struct usbdux_private *devpriv = dev->private;
1156 switch (urb->status) {
1166 * after an unlink command, unplug, ... etc
1167 * no unlink needed here. Already shutting down.
1169 if (devpriv->pwm_cmd_running)
1170 usbdux_pwm_stop(dev, 0);
1176 if (devpriv->pwm_cmd_running) {
1177 dev_err(dev->class_dev,
1178 "Non-zero urb status received in pwm intr context: %d\n",
1180 usbdux_pwm_stop(dev, 0);
1185 /* are we actually running? */
1186 if (!devpriv->pwm_cmd_running)
1189 urb->transfer_buffer_length = devpriv->pwm_buf_sz;
1190 urb->dev = comedi_to_usb_dev(dev);
1192 if (devpriv->pwm_cmd_running) {
1193 ret = usb_submit_urb(urb, GFP_ATOMIC);
1195 dev_err(dev->class_dev,
1196 "pwm urb resubm failed in int-cont. ret=%d",
1198 if (ret == -EL2NSYNC)
1199 dev_err(dev->class_dev,
1200 "buggy USB host controller or bug in IRQ handling!\n");
1202 /* don't do an unlink here */
1203 usbdux_pwm_stop(dev, 0);
1208 static int usbduxsub_submit_pwm_urbs(struct comedi_device *dev)
1210 struct usb_device *usb = comedi_to_usb_dev(dev);
1211 struct usbdux_private *devpriv = dev->private;
1212 struct urb *urb = devpriv->pwm_urb;
1214 /* in case of a resubmission after an unlink... */
1215 usb_fill_bulk_urb(urb, usb, usb_sndbulkpipe(usb, 4),
1216 urb->transfer_buffer,
1217 devpriv->pwm_buf_sz,
1221 return usb_submit_urb(urb, GFP_ATOMIC);
1224 static int usbdux_pwm_period(struct comedi_device *dev,
1225 struct comedi_subdevice *s,
1226 unsigned int period)
1228 struct usbdux_private *devpriv = dev->private;
1231 if (period < MIN_PWM_PERIOD)
1234 fx2delay = (period / (6 * 512 * 1000 / 33)) - 6;
1238 devpriv->pwm_delay = fx2delay;
1239 devpriv->pwm_period = period;
1244 static int usbdux_pwm_start(struct comedi_device *dev,
1245 struct comedi_subdevice *s)
1247 struct usbdux_private *devpriv = dev->private;
1250 mutex_lock(&devpriv->mut);
1252 if (devpriv->pwm_cmd_running)
1253 goto pwm_start_exit;
1255 devpriv->dux_commands[1] = devpriv->pwm_delay;
1256 ret = send_dux_commands(dev, USBDUX_CMD_PWM_ON);
1258 goto pwm_start_exit;
1260 /* initialise the buffer */
1261 memset(devpriv->pwm_urb->transfer_buffer, 0, devpriv->pwm_buf_sz);
1263 devpriv->pwm_cmd_running = 1;
1264 ret = usbduxsub_submit_pwm_urbs(dev);
1266 devpriv->pwm_cmd_running = 0;
1269 mutex_unlock(&devpriv->mut);
1274 static void usbdux_pwm_pattern(struct comedi_device *dev,
1275 struct comedi_subdevice *s,
1280 struct usbdux_private *devpriv = dev->private;
1281 char pwm_mask = (1 << chan); /* DIO bit for the PWM data */
1282 char sgn_mask = (16 << chan); /* DIO bit for the sign */
1283 char *buf = (char *)(devpriv->pwm_urb->transfer_buffer);
1284 int szbuf = devpriv->pwm_buf_sz;
1287 for (i = 0; i < szbuf; i++) {
1301 static int usbdux_pwm_write(struct comedi_device *dev,
1302 struct comedi_subdevice *s,
1303 struct comedi_insn *insn,
1306 unsigned int chan = CR_CHAN(insn->chanspec);
1309 * It doesn't make sense to support more than one value here
1310 * because it would just overwrite the PWM buffer.
1316 * The sign is set via a special INSN only, this gives us 8 bits
1317 * for normal operation, sign is 0 by default.
1319 usbdux_pwm_pattern(dev, s, chan, data[0], 0);
1324 static int usbdux_pwm_config(struct comedi_device *dev,
1325 struct comedi_subdevice *s,
1326 struct comedi_insn *insn,
1329 struct usbdux_private *devpriv = dev->private;
1330 unsigned int chan = CR_CHAN(insn->chanspec);
1333 case INSN_CONFIG_ARM:
1335 * if not zero the PWM is limited to a certain time which is
1336 * not supported here
1340 return usbdux_pwm_start(dev, s);
1341 case INSN_CONFIG_DISARM:
1342 return usbdux_pwm_cancel(dev, s);
1343 case INSN_CONFIG_GET_PWM_STATUS:
1344 data[1] = devpriv->pwm_cmd_running;
1346 case INSN_CONFIG_PWM_SET_PERIOD:
1347 return usbdux_pwm_period(dev, s, data[1]);
1348 case INSN_CONFIG_PWM_GET_PERIOD:
1349 data[1] = devpriv->pwm_period;
1351 case INSN_CONFIG_PWM_SET_H_BRIDGE:
1354 * data[2] = sign (for a relay)
1356 usbdux_pwm_pattern(dev, s, chan, data[1], (data[2] != 0));
1358 case INSN_CONFIG_PWM_GET_H_BRIDGE:
1359 /* values are not kept in this driver, nothing to return here */
1365 static int usbdux_firmware_upload(struct comedi_device *dev,
1366 const u8 *data, size_t size,
1367 unsigned long context)
1369 struct usb_device *usb = comedi_to_usb_dev(dev);
1377 if (size > USBDUX_FIRMWARE_MAX_LEN) {
1378 dev_err(dev->class_dev,
1379 "usbdux firmware binary it too large for FX2.\n");
1383 /* we generate a local buffer for the firmware */
1384 buf = kmemdup(data, size, GFP_KERNEL);
1388 /* we need a malloc'ed buffer for usb_control_msg() */
1389 tmp = kmalloc(1, GFP_KERNEL);
1395 /* stop the current firmware on the device */
1396 *tmp = 1; /* 7f92 to one */
1397 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
1398 USBDUX_FIRMWARE_CMD,
1400 USBDUX_CPU_CS, 0x0000,
1404 dev_err(dev->class_dev, "can not stop firmware\n");
1408 /* upload the new firmware to the device */
1409 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
1410 USBDUX_FIRMWARE_CMD,
1416 dev_err(dev->class_dev, "firmware upload failed\n");
1420 /* start the new firmware on the device */
1421 *tmp = 0; /* 7f92 to zero */
1422 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
1423 USBDUX_FIRMWARE_CMD,
1425 USBDUX_CPU_CS, 0x0000,
1429 dev_err(dev->class_dev, "can not start firmware\n");
1437 static int usbdux_alloc_usb_buffers(struct comedi_device *dev)
1439 struct usb_device *usb = comedi_to_usb_dev(dev);
1440 struct usbdux_private *devpriv = dev->private;
1444 devpriv->dux_commands = kzalloc(SIZEOFDUXBUFFER, GFP_KERNEL);
1445 devpriv->in_buf = kzalloc(SIZEINBUF, GFP_KERNEL);
1446 devpriv->insn_buf = kzalloc(SIZEINSNBUF, GFP_KERNEL);
1447 devpriv->ai_urbs = kcalloc(devpriv->n_ai_urbs, sizeof(void *),
1449 devpriv->ao_urbs = kcalloc(devpriv->n_ao_urbs, sizeof(void *),
1451 if (!devpriv->dux_commands || !devpriv->in_buf || !devpriv->insn_buf ||
1452 !devpriv->ai_urbs || !devpriv->ao_urbs)
1455 for (i = 0; i < devpriv->n_ai_urbs; i++) {
1456 /* one frame: 1ms */
1457 urb = usb_alloc_urb(1, GFP_KERNEL);
1460 devpriv->ai_urbs[i] = urb;
1464 urb->pipe = usb_rcvisocpipe(usb, 6);
1465 urb->transfer_flags = URB_ISO_ASAP;
1466 urb->transfer_buffer = kzalloc(SIZEINBUF, GFP_KERNEL);
1467 if (!urb->transfer_buffer)
1470 urb->complete = usbduxsub_ai_isoc_irq;
1471 urb->number_of_packets = 1;
1472 urb->transfer_buffer_length = SIZEINBUF;
1473 urb->iso_frame_desc[0].offset = 0;
1474 urb->iso_frame_desc[0].length = SIZEINBUF;
1477 for (i = 0; i < devpriv->n_ao_urbs; i++) {
1478 /* one frame: 1ms */
1479 urb = usb_alloc_urb(1, GFP_KERNEL);
1482 devpriv->ao_urbs[i] = urb;
1486 urb->pipe = usb_sndisocpipe(usb, 2);
1487 urb->transfer_flags = URB_ISO_ASAP;
1488 urb->transfer_buffer = kzalloc(SIZEOUTBUF, GFP_KERNEL);
1489 if (!urb->transfer_buffer)
1492 urb->complete = usbduxsub_ao_isoc_irq;
1493 urb->number_of_packets = 1;
1494 urb->transfer_buffer_length = SIZEOUTBUF;
1495 urb->iso_frame_desc[0].offset = 0;
1496 urb->iso_frame_desc[0].length = SIZEOUTBUF;
1497 if (devpriv->high_speed)
1498 urb->interval = 8; /* uframes */
1500 urb->interval = 1; /* frames */
1504 if (devpriv->pwm_buf_sz) {
1505 urb = usb_alloc_urb(0, GFP_KERNEL);
1508 devpriv->pwm_urb = urb;
1510 /* max bulk ep size in high speed */
1511 urb->transfer_buffer = kzalloc(devpriv->pwm_buf_sz,
1513 if (!urb->transfer_buffer)
1520 static void usbdux_free_usb_buffers(struct comedi_device *dev)
1522 struct usbdux_private *devpriv = dev->private;
1526 urb = devpriv->pwm_urb;
1528 kfree(urb->transfer_buffer);
1531 if (devpriv->ao_urbs) {
1532 for (i = 0; i < devpriv->n_ao_urbs; i++) {
1533 urb = devpriv->ao_urbs[i];
1535 kfree(urb->transfer_buffer);
1539 kfree(devpriv->ao_urbs);
1541 if (devpriv->ai_urbs) {
1542 for (i = 0; i < devpriv->n_ai_urbs; i++) {
1543 urb = devpriv->ai_urbs[i];
1545 kfree(urb->transfer_buffer);
1549 kfree(devpriv->ai_urbs);
1551 kfree(devpriv->insn_buf);
1552 kfree(devpriv->in_buf);
1553 kfree(devpriv->dux_commands);
1556 static int usbdux_auto_attach(struct comedi_device *dev,
1557 unsigned long context_unused)
1559 struct usb_interface *intf = comedi_to_usb_interface(dev);
1560 struct usb_device *usb = comedi_to_usb_dev(dev);
1561 struct usbdux_private *devpriv;
1562 struct comedi_subdevice *s;
1565 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
1569 mutex_init(&devpriv->mut);
1571 usb_set_intfdata(intf, devpriv);
1573 devpriv->high_speed = (usb->speed == USB_SPEED_HIGH);
1574 if (devpriv->high_speed) {
1575 devpriv->n_ai_urbs = NUMOFINBUFFERSHIGH;
1576 devpriv->n_ao_urbs = NUMOFOUTBUFFERSHIGH;
1577 devpriv->pwm_buf_sz = 512;
1579 devpriv->n_ai_urbs = NUMOFINBUFFERSFULL;
1580 devpriv->n_ao_urbs = NUMOFOUTBUFFERSFULL;
1583 ret = usbdux_alloc_usb_buffers(dev);
1587 /* setting to alternate setting 3: enabling iso ep and bulk ep. */
1588 ret = usb_set_interface(usb, intf->altsetting->desc.bInterfaceNumber,
1591 dev_err(dev->class_dev,
1592 "could not set alternate setting 3 in high speed\n");
1596 ret = comedi_load_firmware(dev, &usb->dev, USBDUX_FIRMWARE,
1597 usbdux_firmware_upload, 0);
1601 ret = comedi_alloc_subdevices(dev, (devpriv->high_speed) ? 5 : 4);
1605 /* Analog Input subdevice */
1606 s = &dev->subdevices[0];
1607 dev->read_subdev = s;
1608 s->type = COMEDI_SUBD_AI;
1609 s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ;
1611 s->maxdata = 0x0fff;
1612 s->len_chanlist = 8;
1613 s->range_table = &range_usbdux_ai_range;
1614 s->insn_read = usbdux_ai_insn_read;
1615 s->do_cmdtest = usbdux_ai_cmdtest;
1616 s->do_cmd = usbdux_ai_cmd;
1617 s->cancel = usbdux_ai_cancel;
1619 /* Analog Output subdevice */
1620 s = &dev->subdevices[1];
1621 dev->write_subdev = s;
1622 s->type = COMEDI_SUBD_AO;
1623 s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_CMD_WRITE;
1625 s->maxdata = 0x0fff;
1626 s->len_chanlist = s->n_chan;
1627 s->range_table = &range_usbdux_ao_range;
1628 s->do_cmdtest = usbdux_ao_cmdtest;
1629 s->do_cmd = usbdux_ao_cmd;
1630 s->cancel = usbdux_ao_cancel;
1631 s->insn_read = usbdux_ao_insn_read;
1632 s->insn_write = usbdux_ao_insn_write;
1634 ret = comedi_alloc_subdev_readback(s);
1638 /* Digital I/O subdevice */
1639 s = &dev->subdevices[2];
1640 s->type = COMEDI_SUBD_DIO;
1641 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
1644 s->range_table = &range_digital;
1645 s->insn_bits = usbdux_dio_insn_bits;
1646 s->insn_config = usbdux_dio_insn_config;
1648 /* Counter subdevice */
1649 s = &dev->subdevices[3];
1650 s->type = COMEDI_SUBD_COUNTER;
1651 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
1653 s->maxdata = 0xffff;
1654 s->insn_read = usbdux_counter_read;
1655 s->insn_write = usbdux_counter_write;
1656 s->insn_config = usbdux_counter_config;
1658 if (devpriv->high_speed) {
1660 s = &dev->subdevices[4];
1661 s->type = COMEDI_SUBD_PWM;
1662 s->subdev_flags = SDF_WRITABLE | SDF_PWM_HBRIDGE;
1664 s->maxdata = devpriv->pwm_buf_sz;
1665 s->insn_write = usbdux_pwm_write;
1666 s->insn_config = usbdux_pwm_config;
1668 usbdux_pwm_period(dev, s, PWM_DEFAULT_PERIOD);
1674 static void usbdux_detach(struct comedi_device *dev)
1676 struct usb_interface *intf = comedi_to_usb_interface(dev);
1677 struct usbdux_private *devpriv = dev->private;
1679 usb_set_intfdata(intf, NULL);
1684 mutex_lock(&devpriv->mut);
1686 /* force unlink all urbs */
1687 usbdux_pwm_stop(dev, 1);
1688 usbdux_ao_stop(dev, 1);
1689 usbdux_ai_stop(dev, 1);
1691 usbdux_free_usb_buffers(dev);
1693 mutex_unlock(&devpriv->mut);
1695 mutex_destroy(&devpriv->mut);
1698 static struct comedi_driver usbdux_driver = {
1699 .driver_name = "usbdux",
1700 .module = THIS_MODULE,
1701 .auto_attach = usbdux_auto_attach,
1702 .detach = usbdux_detach,
1705 static int usbdux_usb_probe(struct usb_interface *intf,
1706 const struct usb_device_id *id)
1708 return comedi_usb_auto_config(intf, &usbdux_driver, 0);
1711 static const struct usb_device_id usbdux_usb_table[] = {
1712 { USB_DEVICE(0x13d8, 0x0001) },
1713 { USB_DEVICE(0x13d8, 0x0002) },
1716 MODULE_DEVICE_TABLE(usb, usbdux_usb_table);
1718 static struct usb_driver usbdux_usb_driver = {
1720 .probe = usbdux_usb_probe,
1721 .disconnect = comedi_usb_auto_unconfig,
1722 .id_table = usbdux_usb_table,
1724 module_comedi_usb_driver(usbdux_driver, usbdux_usb_driver);
1726 MODULE_AUTHOR("Bernd Porr, BerndPorr@f2s.com");
1727 MODULE_DESCRIPTION("Stirling/ITL USB-DUX -- Bernd.Porr@f2s.com");
1728 MODULE_LICENSE("GPL");
1729 MODULE_FIRMWARE(USBDUX_FIRMWARE);