2 comedi/drivers/usbdux.c
3 Copyright (C) 2003-2007 Bernd Porr, Bernd.Porr@f2s.com
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
17 Description: University of Stirling USB DAQ & INCITE Technology Limited
18 Devices: [ITL] USB-DUX (usbdux.o)
19 Author: Bernd Porr <BerndPorr@f2s.com>
22 Configuration options:
23 You have to upload firmware with the -i option. The
24 firmware is usually installed under /usr/share/usb or
25 /usr/local/share/usb or /lib/firmware.
27 Connection scheme for the counter at the digital port:
28 0=/CLK0, 1=UP/DOWN0, 2=RESET0, 4=/CLK1, 5=UP/DOWN1, 6=RESET1.
29 The sampling rate of the counter is approximately 500Hz.
31 Please note that under USB2.0 the length of the channel list determines
32 the max sampling rate. If you sample only one channel you get 8kHz
33 sampling rate. If you sample two channels you get 4kHz and so on.
36 * I must give credit here to Chris Baugher who
37 * wrote the driver for AT-MIO-16d. I used some parts of this
38 * driver. I also must give credits to David Brownell
39 * who supported me with the USB development.
45 * 0.94: D/A output should work now with any channel list combinations
46 * 0.95: .owner commented out for kernel vers below 2.4.19
47 * sanity checks in ai/ao_cmd
48 * 0.96: trying to get it working with 2.6, moved all memory alloc to comedi's
49 * attach final USB IDs
50 * moved memory allocation completely to the corresponding comedi
51 * functions firmware upload is by fxload and no longer by comedi (due to
53 * 0.97: USB IDs received, adjusted table
54 * 0.98: SMP, locking, memory alloc: moved all usb memory alloc
55 * to the usb subsystem and moved all comedi related memory
57 * | kernel | registration | usbdux-usb | usbdux-comedi | comedi |
58 * 0.99: USB 2.0: changed protocol to isochronous transfer
59 * IRQ transfer is too buggy and too risky in 2.0
60 * for the high speed ISO transfer is now a working version
62 * 0.99b: Increased the iso transfer buffer for high sp.to 10 buffers. Some VIA
63 * chipsets miss out IRQs. Deeper buffering is needed.
64 * 1.00: full USB 2.0 support for the A/D converter. Now: max 8kHz sampling
66 * Firmware vers 1.00 is needed for this.
67 * Two 16 bit up/down/reset counter with a sampling rate of 1kHz
68 * And loads of cleaning up, in particular streamlining the
70 * 1.1: moved EP4 transfers to EP1 to make space for a PWM output on EP4
71 * 1.2: added PWM support via EP4
72 * 2.0: PWM seems to be stable and is not interfering with the other functions
73 * 2.1: changed PWM API
74 * 2.2: added firmware kernel request to fix an udev problem
75 * 2.3: corrected a bug in bulk timeouts which were far too short
76 * 2.4: fixed a bug which causes the driver to hang when it ran out of data.
77 * Thanks to Jan-Matthias Braun and Ian to spot the bug and fix it.
81 #include <linux/kernel.h>
82 #include <linux/module.h>
83 #include <linux/init.h>
84 #include <linux/slab.h>
85 #include <linux/input.h>
86 #include <linux/usb.h>
87 #include <linux/fcntl.h>
88 #include <linux/compiler.h>
90 #include "../comedidev.h"
92 #include "comedi_fc.h"
94 /* timeout for the USB-transfer in ms*/
95 #define BULK_TIMEOUT 1000
97 /* constants for "firmware" upload and download */
98 #define FIRMWARE "usbdux_firmware.bin"
99 #define USBDUXSUB_FIRMWARE 0xA0
100 #define VENDOR_DIR_IN 0xC0
101 #define VENDOR_DIR_OUT 0x40
103 /* internal addresses of the 8051 processor */
104 #define USBDUXSUB_CPUCS 0xE600
107 * the minor device number, major is 180 only for debugging purposes and to
108 * upload special firmware (programming the eeprom etc) which is not compatible
109 * with the comedi framwork
111 #define USBDUXSUB_MINOR 32
113 /* max lenghth of the transfer-buffer for software upload */
114 #define TB_LEN 0x2000
116 /* Input endpoint number: ISO/IRQ */
119 /* Output endpoint number: ISO/IRQ */
122 /* This EP sends DUX commands to USBDUX */
123 #define COMMAND_OUT_EP 1
125 /* This EP receives the DUX commands from USBDUX */
126 #define COMMAND_IN_EP 8
128 /* Output endpoint for PWM */
131 /* 300Hz max frequ under PWM */
132 #define MIN_PWM_PERIOD ((long)(1E9/300))
134 /* Default PWM frequency */
135 #define PWM_DEFAULT_PERIOD ((long)(1E9/100))
137 /* Number of channels */
138 #define NUMCHANNELS 8
140 /* Size of one A/D value */
141 #define SIZEADIN ((sizeof(int16_t)))
144 * Size of the input-buffer IN BYTES
145 * Always multiple of 8 for 8 microframes which is needed in the highspeed mode
147 #define SIZEINBUF ((8*SIZEADIN))
150 #define SIZEINSNBUF 16
152 /* Number of DA channels */
153 #define NUMOUTCHANNELS 8
155 /* size of one value for the D/A converter: channel and value */
156 #define SIZEDAOUT ((sizeof(int8_t)+sizeof(int16_t)))
159 * Size of the output-buffer in bytes
160 * Actually only the first 4 triplets are used but for the
161 * high speed mode we need to pad it to 8 (microframes).
163 #define SIZEOUTBUF ((8*SIZEDAOUT))
166 * Size of the buffer for the dux commands: just now max size is determined
167 * by the analogue out + command byte + panic bytes...
169 #define SIZEOFDUXBUFFER ((8*SIZEDAOUT+2))
171 /* Number of in-URBs which receive the data: min=2 */
172 #define NUMOFINBUFFERSFULL 5
174 /* Number of out-URBs which send the data: min=2 */
175 #define NUMOFOUTBUFFERSFULL 5
177 /* Number of in-URBs which receive the data: min=5 */
178 /* must have more buffers due to buggy USB ctr */
179 #define NUMOFINBUFFERSHIGH 10
181 /* Number of out-URBs which send the data: min=5 */
182 /* must have more buffers due to buggy USB ctr */
183 #define NUMOFOUTBUFFERSHIGH 10
185 /* number of retries to get the right dux command */
188 static const struct comedi_lrange range_usbdux_ai_range = {
191 BIP_RANGE(4.096 / 2),
197 static const struct comedi_lrange range_usbdux_ao_range = {
204 struct usbdux_private {
205 /* pointer to the usb-device */
206 struct usb_device *usbdev;
207 /* actual number of in-buffers */
209 /* actual number of out-buffers */
211 /* ISO-transfer handling: buffers */
213 struct urb **urb_out;
214 /* pwm-transfer handling */
217 unsigned int pwm_period;
218 /* PWM internal delay for the GPIF in the FX2 */
220 /* size of the PWM buffer which holds the bit pattern */
222 /* input buffer for the ISO-transfer */
224 /* input buffer for single insn */
225 int16_t *insn_buffer;
226 /* output buffer for single DA outputs */
228 /* interface number */
230 /* is it USB_SPEED_HIGH or not? */
231 short int high_speed;
232 /* asynchronous command is running */
233 short int ai_cmd_running;
234 short int ao_cmd_running;
236 short int pwm_cmd_running;
237 /* continous acquisition */
238 short int ai_continous;
239 short int ao_continous;
240 /* number of samples to acquire */
243 /* time between samples in units of the timer */
244 unsigned int ai_timer;
245 unsigned int ao_timer;
246 /* counter between aquisitions */
247 unsigned int ai_counter;
248 unsigned int ao_counter;
249 /* interval in frames/uframes */
250 unsigned int ai_interval;
252 int8_t *dac_commands;
254 int8_t *dux_commands;
255 struct semaphore sem;
259 * Stops the data acquision
260 * It should be safe to call this function from any context
262 static int usbduxsub_unlink_inurbs(struct usbdux_private *usbduxsub_tmp)
267 if (usbduxsub_tmp && usbduxsub_tmp->urb_in) {
268 for (i = 0; i < usbduxsub_tmp->num_in_buffers; i++) {
269 if (usbduxsub_tmp->urb_in[i]) {
270 /* We wait here until all transfers have been
272 usb_kill_urb(usbduxsub_tmp->urb_in[i]);
280 * This will stop a running acquisition operation
281 * Is called from within this driver from both the
282 * interrupt context and from comedi
284 static int usbdux_ai_stop(struct usbdux_private *this_usbduxsub, int do_unlink)
293 ret = usbduxsub_unlink_inurbs(this_usbduxsub);
296 this_usbduxsub->ai_cmd_running = 0;
302 * This will cancel a running acquisition operation.
303 * This is called by comedi but never from inside the driver.
305 static int usbdux_ai_cancel(struct comedi_device *dev,
306 struct comedi_subdevice *s)
308 struct usbdux_private *this_usbduxsub;
311 /* force unlink of all urbs */
312 this_usbduxsub = dev->private;
316 /* prevent other CPUs from submitting new commands just now */
317 down(&this_usbduxsub->sem);
318 /* unlink only if the urb really has been submitted */
319 res = usbdux_ai_stop(this_usbduxsub, this_usbduxsub->ai_cmd_running);
320 up(&this_usbduxsub->sem);
324 /* analogue IN - interrupt service routine */
325 static void usbduxsub_ai_isoc_irq(struct urb *urb)
327 struct comedi_device *dev = urb->context;
328 struct comedi_subdevice *s = dev->read_subdev;
329 struct usbdux_private *devpriv = dev->private;
332 /* first we test if something unusual has just happened */
333 switch (urb->status) {
335 /* copy the result in the transfer buffer */
336 memcpy(devpriv->in_buffer, urb->transfer_buffer, SIZEINBUF);
339 /* error in the ISOchronous data */
340 /* we don't copy the data into the transfer buffer */
341 /* and recycle the last data byte */
342 dev_dbg(dev->class_dev, "CRC error in ISO IN stream\n");
349 /* happens after an unlink command */
350 if (devpriv->ai_cmd_running) {
351 s->async->events |= COMEDI_CB_EOA;
352 s->async->events |= COMEDI_CB_ERROR;
353 comedi_event(dev, s);
354 /* stop the transfer w/o unlink */
355 usbdux_ai_stop(devpriv, 0);
360 /* a real error on the bus */
361 /* pass error to comedi if we are really running a command */
362 if (devpriv->ai_cmd_running) {
363 dev_err(dev->class_dev,
364 "Non-zero urb status received in ai intr context: %d\n",
366 s->async->events |= COMEDI_CB_EOA;
367 s->async->events |= COMEDI_CB_ERROR;
368 comedi_event(dev, s);
369 /* don't do an unlink here */
370 usbdux_ai_stop(devpriv, 0);
376 * at this point we are reasonably sure that nothing dodgy has happened
377 * are we running a command?
379 if (unlikely(!devpriv->ai_cmd_running)) {
381 * not running a command, do not continue execution if no
382 * asynchronous command is running in particular not resubmit
387 urb->dev = devpriv->usbdev;
389 /* resubmit the urb */
390 err = usb_submit_urb(urb, GFP_ATOMIC);
391 if (unlikely(err < 0)) {
392 dev_err(dev->class_dev,
393 "urb resubmit failed in int-context! err=%d\n", err);
394 if (err == -EL2NSYNC)
395 dev_err(dev->class_dev,
396 "buggy USB host controller or bug in IRQ handler!\n");
397 s->async->events |= COMEDI_CB_EOA;
398 s->async->events |= COMEDI_CB_ERROR;
399 comedi_event(dev, s);
400 /* don't do an unlink here */
401 usbdux_ai_stop(devpriv, 0);
405 devpriv->ai_counter--;
406 if (likely(devpriv->ai_counter > 0))
409 /* timer zero, transfer measurements to comedi */
410 devpriv->ai_counter = devpriv->ai_timer;
412 /* test, if we transmit only a fixed number of samples */
413 if (!devpriv->ai_continous) {
414 /* not continuous, fixed number of samples */
415 devpriv->ai_sample_count--;
416 /* all samples received? */
417 if (devpriv->ai_sample_count < 0) {
418 /* prevent a resubmit next time */
419 usbdux_ai_stop(devpriv, 0);
420 /* say comedi that the acquistion is over */
421 s->async->events |= COMEDI_CB_EOA;
422 comedi_event(dev, s);
426 /* get the data from the USB bus and hand it over to comedi */
427 n = s->async->cmd.chanlist_len;
428 for (i = 0; i < n; i++) {
430 if (CR_RANGE(s->async->cmd.chanlist[i]) <= 1) {
431 err = comedi_buf_put(s->async,
432 le16_to_cpu(devpriv->in_buffer[i]) ^ 0x800);
434 err = comedi_buf_put(s->async,
435 le16_to_cpu(devpriv->in_buffer[i]));
437 if (unlikely(err == 0)) {
438 /* buffer overflow */
439 usbdux_ai_stop(devpriv, 0);
443 /* tell comedi that data is there */
444 s->async->events |= COMEDI_CB_BLOCK | COMEDI_CB_EOS;
445 comedi_event(dev, s);
448 static int usbduxsub_unlink_outurbs(struct usbdux_private *usbduxsub_tmp)
453 if (usbduxsub_tmp && usbduxsub_tmp->urb_out) {
454 for (i = 0; i < usbduxsub_tmp->num_out_buffers; i++) {
455 if (usbduxsub_tmp->urb_out[i])
456 usb_kill_urb(usbduxsub_tmp->urb_out[i]);
462 /* This will cancel a running acquisition operation
465 static int usbdux_ao_stop(struct usbdux_private *this_usbduxsub, int do_unlink)
473 ret = usbduxsub_unlink_outurbs(this_usbduxsub);
475 this_usbduxsub->ao_cmd_running = 0;
480 /* force unlink, is called by comedi */
481 static int usbdux_ao_cancel(struct comedi_device *dev,
482 struct comedi_subdevice *s)
484 struct usbdux_private *this_usbduxsub = dev->private;
490 /* prevent other CPUs from submitting a command just now */
491 down(&this_usbduxsub->sem);
492 /* unlink only if it is really running */
493 res = usbdux_ao_stop(this_usbduxsub, this_usbduxsub->ao_cmd_running);
494 up(&this_usbduxsub->sem);
498 static void usbduxsub_ao_isoc_irq(struct urb *urb)
500 struct comedi_device *dev = urb->context;
501 struct comedi_subdevice *s = dev->write_subdev;
502 struct usbdux_private *devpriv = dev->private;
506 switch (urb->status) {
515 /* after an unlink command, unplug, ... etc */
516 /* no unlink needed here. Already shutting down. */
517 if (devpriv->ao_cmd_running) {
518 s->async->events |= COMEDI_CB_EOA;
519 comedi_event(dev, s);
520 usbdux_ao_stop(devpriv, 0);
526 if (devpriv->ao_cmd_running) {
527 dev_err(dev->class_dev,
528 "Non-zero urb status received in ao intr context: %d\n",
530 s->async->events |= COMEDI_CB_ERROR;
531 s->async->events |= COMEDI_CB_EOA;
532 comedi_event(dev, s);
533 /* we do an unlink if we are in the high speed mode */
534 usbdux_ao_stop(devpriv, 0);
539 /* are we actually running? */
540 if (!devpriv->ao_cmd_running)
543 /* normal operation: executing a command in this subdevice */
544 devpriv->ao_counter--;
545 if ((int)devpriv->ao_counter <= 0) {
547 devpriv->ao_counter = devpriv->ao_timer;
549 /* handle non continous acquisition */
550 if (!devpriv->ao_continous) {
551 /* fixed number of samples */
552 devpriv->ao_sample_count--;
553 if (devpriv->ao_sample_count < 0) {
554 /* all samples transmitted */
555 usbdux_ao_stop(devpriv, 0);
556 s->async->events |= COMEDI_CB_EOA;
557 comedi_event(dev, s);
558 /* no resubmit of the urb */
562 /* transmit data to the USB bus */
563 ((uint8_t *) (urb->transfer_buffer))[0] =
564 s->async->cmd.chanlist_len;
565 for (i = 0; i < s->async->cmd.chanlist_len; i++) {
567 if (i >= NUMOUTCHANNELS)
570 /* pointer to the DA */
572 (&(((int8_t *) urb->transfer_buffer)[i * 3 + 1]));
573 /* get the data from comedi */
574 ret = comedi_buf_get(s->async, &temp);
576 datap[1] = temp >> 8;
577 datap[2] = devpriv->dac_commands[i];
579 dev_err(&urb->dev->dev,
580 "comedi: buffer underflow\n");
581 s->async->events |= COMEDI_CB_EOA;
582 s->async->events |= COMEDI_CB_OVERFLOW;
584 /* transmit data to comedi */
585 s->async->events |= COMEDI_CB_BLOCK;
586 comedi_event(dev, s);
589 urb->transfer_buffer_length = SIZEOUTBUF;
590 urb->dev = devpriv->usbdev;
592 if (devpriv->ao_cmd_running) {
593 if (devpriv->high_speed)
594 urb->interval = 8; /* uframes */
596 urb->interval = 1; /* frames */
597 urb->number_of_packets = 1;
598 urb->iso_frame_desc[0].offset = 0;
599 urb->iso_frame_desc[0].length = SIZEOUTBUF;
600 urb->iso_frame_desc[0].status = 0;
601 ret = usb_submit_urb(urb, GFP_ATOMIC);
603 dev_err(dev->class_dev,
604 "ao urb resubm failed in int-cont. ret=%d",
607 dev_err(dev->class_dev,
608 "buggy USB host controller or bug in IRQ handling!\n");
610 s->async->events |= COMEDI_CB_EOA;
611 s->async->events |= COMEDI_CB_ERROR;
612 comedi_event(dev, s);
613 /* don't do an unlink here */
614 usbdux_ao_stop(devpriv, 0);
619 #define FIRMWARE_MAX_LEN 0x2000
621 static int usbdux_firmware_upload(struct comedi_device *dev,
622 const u8 *data, size_t size,
623 unsigned long context)
625 struct usbdux_private *usbduxsub = dev->private;
626 struct usb_device *usb = usbduxsub->usbdev;
634 if (size > FIRMWARE_MAX_LEN) {
635 dev_err(dev->class_dev,
636 "usbdux firmware binary it too large for FX2.\n");
640 /* we generate a local buffer for the firmware */
641 buf = kmemdup(data, size, GFP_KERNEL);
645 /* we need a malloc'ed buffer for usb_control_msg() */
646 tmp = kmalloc(1, GFP_KERNEL);
652 /* stop the current firmware on the device */
653 *tmp = 1; /* 7f92 to one */
654 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
657 USBDUXSUB_CPUCS, 0x0000,
661 dev_err(dev->class_dev, "can not stop firmware\n");
665 /* upload the new firmware to the device */
666 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
673 dev_err(dev->class_dev, "firmware upload failed\n");
677 /* start the new firmware on the device */
678 *tmp = 0; /* 7f92 to zero */
679 ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0),
682 USBDUXSUB_CPUCS, 0x0000,
686 dev_err(dev->class_dev, "can not start firmware\n");
694 static int usbduxsub_submit_inurbs(struct comedi_device *dev)
696 struct usbdux_private *devpriv = dev->private;
701 /* Submit all URBs and start the transfer on the bus */
702 for (i = 0; i < devpriv->num_in_buffers; i++) {
703 urb = devpriv->urb_in[i];
705 /* in case of a resubmission after an unlink... */
706 urb->interval = devpriv->ai_interval;
708 urb->dev = devpriv->usbdev;
710 urb->transfer_flags = URB_ISO_ASAP;
712 ret = usb_submit_urb(urb, GFP_ATOMIC);
719 static int usbduxsub_submit_outurbs(struct comedi_device *dev)
721 struct usbdux_private *devpriv = dev->private;
726 for (i = 0; i < devpriv->num_out_buffers; i++) {
727 urb = devpriv->urb_out[i];
729 /* in case of a resubmission after an unlink... */
731 urb->dev = devpriv->usbdev;
733 urb->transfer_flags = URB_ISO_ASAP;
735 ret = usb_submit_urb(urb, GFP_ATOMIC);
742 static int usbdux_ai_cmdtest(struct comedi_device *dev,
743 struct comedi_subdevice *s, struct comedi_cmd *cmd)
745 struct usbdux_private *this_usbduxsub = dev->private;
747 unsigned int tmp_timer;
749 /* Step 1 : check if triggers are trivially valid */
751 err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
752 err |= cfc_check_trigger_src(&cmd->scan_begin_src, TRIG_TIMER);
753 err |= cfc_check_trigger_src(&cmd->convert_src, TRIG_NOW);
754 err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
755 err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
760 /* Step 2a : make sure trigger sources are unique */
762 err |= cfc_check_trigger_is_unique(cmd->start_src);
763 err |= cfc_check_trigger_is_unique(cmd->stop_src);
765 /* Step 2b : and mutually compatible */
770 /* Step 3: check if arguments are trivially valid */
772 err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
774 if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */
775 err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
777 if (cmd->scan_begin_src == TRIG_TIMER) {
778 if (this_usbduxsub->high_speed) {
780 * In high speed mode microframes are possible.
781 * However, during one microframe we can roughly
782 * sample one channel. Thus, the more channels
783 * are in the channel list the more time we need.
786 /* find a power of 2 for the number of channels */
787 while (i < (cmd->chanlist_len))
790 err |= cfc_check_trigger_arg_min(&cmd->scan_begin_arg,
792 /* now calc the real sampling rate with all the
795 ((unsigned int)(cmd->scan_begin_arg / 125000)) *
799 /* 1kHz scans every USB frame */
800 err |= cfc_check_trigger_arg_min(&cmd->scan_begin_arg,
803 * calc the real sampling rate with the rounding errors
805 tmp_timer = ((unsigned int)(cmd->scan_begin_arg /
808 err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg,
812 err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
814 if (cmd->stop_src == TRIG_COUNT) {
815 /* any count is allowed */
818 err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0);
828 * creates the ADC command for the MAX1271
829 * range is the range value from comedi
831 static int8_t create_adc_command(unsigned int chan, int range)
833 int8_t p = (range <= 1);
834 int8_t r = ((range % 2) == 0);
835 return (chan << 4) | ((p == 1) << 2) | ((r == 1) << 3);
838 /* bulk transfers to usbdux */
840 #define SENDADCOMMANDS 0
841 #define SENDDACOMMANDS 1
842 #define SENDDIOCONFIGCOMMAND 2
843 #define SENDDIOBITSCOMMAND 3
844 #define SENDSINGLEAD 4
845 #define READCOUNTERCOMMAND 5
846 #define WRITECOUNTERCOMMAND 6
850 static int send_dux_commands(struct comedi_device *dev, int cmd_type)
852 struct usbdux_private *devpriv = dev->private;
853 struct usb_device *usb = devpriv->usbdev;
856 devpriv->dux_commands[0] = cmd_type;
858 return usb_bulk_msg(usb, usb_sndbulkpipe(usb, COMMAND_OUT_EP),
859 devpriv->dux_commands, SIZEOFDUXBUFFER,
860 &nsent, BULK_TIMEOUT);
863 static int receive_dux_commands(struct comedi_device *dev, int command)
865 struct usbdux_private *devpriv = dev->private;
866 struct usb_device *usb = devpriv->usbdev;
871 for (i = 0; i < RETRIES; i++) {
872 ret = usb_bulk_msg(usb, usb_rcvbulkpipe(usb, COMMAND_IN_EP),
873 devpriv->insn_buffer, SIZEINSNBUF,
874 &nrec, BULK_TIMEOUT);
877 if (le16_to_cpu(devpriv->insn_buffer[0]) == command)
880 /* command not received */
884 static int usbdux_ai_inttrig(struct comedi_device *dev,
885 struct comedi_subdevice *s, unsigned int trignum)
888 struct usbdux_private *this_usbduxsub = dev->private;
892 down(&this_usbduxsub->sem);
895 up(&this_usbduxsub->sem);
898 if (!(this_usbduxsub->ai_cmd_running)) {
899 this_usbduxsub->ai_cmd_running = 1;
900 ret = usbduxsub_submit_inurbs(dev);
902 this_usbduxsub->ai_cmd_running = 0;
903 up(&this_usbduxsub->sem);
906 s->async->inttrig = NULL;
908 up(&this_usbduxsub->sem);
912 static int usbdux_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
914 struct comedi_cmd *cmd = &s->async->cmd;
915 unsigned int chan, range;
917 struct usbdux_private *this_usbduxsub = dev->private;
923 /* block other CPUs from starting an ai_cmd */
924 down(&this_usbduxsub->sem);
925 if (this_usbduxsub->ai_cmd_running) {
926 up(&this_usbduxsub->sem);
929 /* set current channel of the running acquisition to zero */
930 s->async->cur_chan = 0;
932 this_usbduxsub->dux_commands[1] = cmd->chanlist_len;
933 for (i = 0; i < cmd->chanlist_len; ++i) {
934 chan = CR_CHAN(cmd->chanlist[i]);
935 range = CR_RANGE(cmd->chanlist[i]);
936 if (i >= NUMCHANNELS)
938 this_usbduxsub->dux_commands[i + 2] =
939 create_adc_command(chan, range);
942 result = send_dux_commands(dev, SENDADCOMMANDS);
944 up(&this_usbduxsub->sem);
948 if (this_usbduxsub->high_speed) {
950 * every channel gets a time window of 125us. Thus, if we
951 * sample all 8 channels we need 1ms. If we sample only one
952 * channel we need only 125us
954 this_usbduxsub->ai_interval = 1;
955 /* find a power of 2 for the interval */
956 while ((this_usbduxsub->ai_interval) < (cmd->chanlist_len)) {
957 this_usbduxsub->ai_interval =
958 (this_usbduxsub->ai_interval) * 2;
960 this_usbduxsub->ai_timer = cmd->scan_begin_arg / (125000 *
964 /* interval always 1ms */
965 this_usbduxsub->ai_interval = 1;
966 this_usbduxsub->ai_timer = cmd->scan_begin_arg / 1000000;
968 if (this_usbduxsub->ai_timer < 1) {
969 up(&this_usbduxsub->sem);
972 this_usbduxsub->ai_counter = this_usbduxsub->ai_timer;
974 if (cmd->stop_src == TRIG_COUNT) {
975 /* data arrives as one packet */
976 this_usbduxsub->ai_sample_count = cmd->stop_arg;
977 this_usbduxsub->ai_continous = 0;
979 /* continous acquisition */
980 this_usbduxsub->ai_continous = 1;
981 this_usbduxsub->ai_sample_count = 0;
984 if (cmd->start_src == TRIG_NOW) {
985 /* enable this acquisition operation */
986 this_usbduxsub->ai_cmd_running = 1;
987 ret = usbduxsub_submit_inurbs(dev);
989 this_usbduxsub->ai_cmd_running = 0;
990 /* fixme: unlink here?? */
991 up(&this_usbduxsub->sem);
994 s->async->inttrig = NULL;
997 /* don't enable the acquision operation */
998 /* wait for an internal signal */
999 s->async->inttrig = usbdux_ai_inttrig;
1001 up(&this_usbduxsub->sem);
1005 /* Mode 0 is used to get a single conversion on demand */
1006 static int usbdux_ai_insn_read(struct comedi_device *dev,
1007 struct comedi_subdevice *s,
1008 struct comedi_insn *insn, unsigned int *data)
1011 unsigned int one = 0;
1014 struct usbdux_private *this_usbduxsub = dev->private;
1016 if (!this_usbduxsub)
1019 down(&this_usbduxsub->sem);
1020 if (this_usbduxsub->ai_cmd_running) {
1021 up(&this_usbduxsub->sem);
1025 /* sample one channel */
1026 chan = CR_CHAN(insn->chanspec);
1027 range = CR_RANGE(insn->chanspec);
1028 /* set command for the first channel */
1029 this_usbduxsub->dux_commands[1] = create_adc_command(chan, range);
1032 err = send_dux_commands(dev, SENDSINGLEAD);
1034 up(&this_usbduxsub->sem);
1038 for (i = 0; i < insn->n; i++) {
1039 err = receive_dux_commands(dev, SENDSINGLEAD);
1041 up(&this_usbduxsub->sem);
1044 one = le16_to_cpu(this_usbduxsub->insn_buffer[1]);
1045 if (CR_RANGE(insn->chanspec) <= 1)
1050 up(&this_usbduxsub->sem);
1054 /************************************/
1057 static int usbdux_ao_insn_read(struct comedi_device *dev,
1058 struct comedi_subdevice *s,
1059 struct comedi_insn *insn, unsigned int *data)
1062 int chan = CR_CHAN(insn->chanspec);
1063 struct usbdux_private *this_usbduxsub = dev->private;
1065 if (!this_usbduxsub)
1068 down(&this_usbduxsub->sem);
1069 for (i = 0; i < insn->n; i++)
1070 data[i] = this_usbduxsub->out_buffer[chan];
1072 up(&this_usbduxsub->sem);
1076 static int usbdux_ao_insn_write(struct comedi_device *dev,
1077 struct comedi_subdevice *s,
1078 struct comedi_insn *insn, unsigned int *data)
1081 int chan = CR_CHAN(insn->chanspec);
1082 struct usbdux_private *this_usbduxsub = dev->private;
1084 if (!this_usbduxsub)
1087 down(&this_usbduxsub->sem);
1088 if (this_usbduxsub->ao_cmd_running) {
1089 up(&this_usbduxsub->sem);
1093 for (i = 0; i < insn->n; i++) {
1094 /* number of channels: 1 */
1095 this_usbduxsub->dux_commands[1] = 1;
1096 /* one 16 bit value */
1097 *((int16_t *) (this_usbduxsub->dux_commands + 2)) =
1098 cpu_to_le16(data[i]);
1099 this_usbduxsub->out_buffer[chan] = data[i];
1100 /* channel number */
1101 this_usbduxsub->dux_commands[4] = (chan << 6);
1102 err = send_dux_commands(dev, SENDDACOMMANDS);
1104 up(&this_usbduxsub->sem);
1108 up(&this_usbduxsub->sem);
1113 static int usbdux_ao_inttrig(struct comedi_device *dev,
1114 struct comedi_subdevice *s, unsigned int trignum)
1117 struct usbdux_private *this_usbduxsub = dev->private;
1119 if (!this_usbduxsub)
1122 down(&this_usbduxsub->sem);
1124 up(&this_usbduxsub->sem);
1127 if (!(this_usbduxsub->ao_cmd_running)) {
1128 this_usbduxsub->ao_cmd_running = 1;
1129 ret = usbduxsub_submit_outurbs(dev);
1131 this_usbduxsub->ao_cmd_running = 0;
1132 up(&this_usbduxsub->sem);
1135 s->async->inttrig = NULL;
1137 up(&this_usbduxsub->sem);
1141 static int usbdux_ao_cmdtest(struct comedi_device *dev,
1142 struct comedi_subdevice *s, struct comedi_cmd *cmd)
1144 struct usbdux_private *this_usbduxsub = dev->private;
1148 if (!this_usbduxsub)
1151 /* Step 1 : check if triggers are trivially valid */
1153 err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
1155 if (0) { /* (this_usbduxsub->high_speed) */
1156 /* the sampling rate is set by the coversion rate */
1157 flags = TRIG_FOLLOW;
1159 /* start a new scan (output at once) with a timer */
1162 err |= cfc_check_trigger_src(&cmd->scan_begin_src, flags);
1164 if (0) { /* (this_usbduxsub->high_speed) */
1166 * in usb-2.0 only one conversion it transmitted
1172 * all conversion events happen simultaneously with
1177 err |= cfc_check_trigger_src(&cmd->convert_src, flags);
1179 err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
1180 err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
1185 /* Step 2a : make sure trigger sources are unique */
1187 err |= cfc_check_trigger_is_unique(cmd->start_src);
1188 err |= cfc_check_trigger_is_unique(cmd->stop_src);
1190 /* Step 2b : and mutually compatible */
1195 /* Step 3: check if arguments are trivially valid */
1197 err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
1199 if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */
1200 err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
1202 if (cmd->scan_begin_src == TRIG_TIMER)
1203 err |= cfc_check_trigger_arg_min(&cmd->scan_begin_arg,
1206 /* not used now, is for later use */
1207 if (cmd->convert_src == TRIG_TIMER)
1208 err |= cfc_check_trigger_arg_min(&cmd->convert_arg, 125000);
1210 err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
1212 if (cmd->stop_src == TRIG_COUNT) {
1213 /* any count is allowed */
1216 err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0);
1225 static int usbdux_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
1227 struct comedi_cmd *cmd = &s->async->cmd;
1228 unsigned int chan, gain;
1230 struct usbdux_private *this_usbduxsub = dev->private;
1232 if (!this_usbduxsub)
1235 down(&this_usbduxsub->sem);
1237 /* set current channel of the running acquisition to zero */
1238 s->async->cur_chan = 0;
1239 for (i = 0; i < cmd->chanlist_len; ++i) {
1240 chan = CR_CHAN(cmd->chanlist[i]);
1241 gain = CR_RANGE(cmd->chanlist[i]);
1242 if (i >= NUMOUTCHANNELS)
1244 this_usbduxsub->dac_commands[i] = (chan << 6);
1247 /* we count in steps of 1ms (125us) */
1248 /* 125us mode not used yet */
1249 if (0) { /* (this_usbduxsub->high_speed) */
1251 /* timing of the conversion itself: every 125 us */
1252 this_usbduxsub->ao_timer = cmd->convert_arg / 125000;
1255 /* timing of the scan: we get all channels at once */
1256 this_usbduxsub->ao_timer = cmd->scan_begin_arg / 1000000;
1257 if (this_usbduxsub->ao_timer < 1) {
1258 up(&this_usbduxsub->sem);
1262 this_usbduxsub->ao_counter = this_usbduxsub->ao_timer;
1264 if (cmd->stop_src == TRIG_COUNT) {
1265 /* not continuous */
1267 /* high speed also scans everything at once */
1268 if (0) { /* (this_usbduxsub->high_speed) */
1269 this_usbduxsub->ao_sample_count =
1270 (cmd->stop_arg) * (cmd->scan_end_arg);
1272 /* there's no scan as the scan has been */
1273 /* perf inside the FX2 */
1274 /* data arrives as one packet */
1275 this_usbduxsub->ao_sample_count = cmd->stop_arg;
1277 this_usbduxsub->ao_continous = 0;
1279 /* continous acquisition */
1280 this_usbduxsub->ao_continous = 1;
1281 this_usbduxsub->ao_sample_count = 0;
1284 if (cmd->start_src == TRIG_NOW) {
1285 /* enable this acquisition operation */
1286 this_usbduxsub->ao_cmd_running = 1;
1287 ret = usbduxsub_submit_outurbs(dev);
1289 this_usbduxsub->ao_cmd_running = 0;
1290 /* fixme: unlink here?? */
1291 up(&this_usbduxsub->sem);
1294 s->async->inttrig = NULL;
1297 /* submit the urbs later */
1298 /* wait for an internal signal */
1299 s->async->inttrig = usbdux_ao_inttrig;
1302 up(&this_usbduxsub->sem);
1306 static int usbdux_dio_insn_config(struct comedi_device *dev,
1307 struct comedi_subdevice *s,
1308 struct comedi_insn *insn, unsigned int *data)
1310 int chan = CR_CHAN(insn->chanspec);
1312 /* The input or output configuration of each digital line is
1313 * configured by a special insn_config instruction. chanspec
1314 * contains the channel to be changed, and data[0] contains the
1315 * value COMEDI_INPUT or COMEDI_OUTPUT. */
1318 case INSN_CONFIG_DIO_OUTPUT:
1319 s->io_bits |= 1 << chan; /* 1 means Out */
1321 case INSN_CONFIG_DIO_INPUT:
1322 s->io_bits &= ~(1 << chan);
1324 case INSN_CONFIG_DIO_QUERY:
1326 (s->io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT;
1332 /* we don't tell the firmware here as it would take 8 frames */
1333 /* to submit the information. We do it in the insn_bits. */
1337 static int usbdux_dio_insn_bits(struct comedi_device *dev,
1338 struct comedi_subdevice *s,
1339 struct comedi_insn *insn, unsigned int *data)
1342 struct usbdux_private *this_usbduxsub = dev->private;
1345 if (!this_usbduxsub)
1348 down(&this_usbduxsub->sem);
1350 /* The insn data is a mask in data[0] and the new data
1351 * in data[1], each channel cooresponding to a bit. */
1352 s->state &= ~data[0];
1353 s->state |= data[0] & data[1];
1354 this_usbduxsub->dux_commands[1] = s->io_bits;
1355 this_usbduxsub->dux_commands[2] = s->state;
1357 /* This command also tells the firmware to return */
1358 /* the digital input lines */
1359 err = send_dux_commands(dev, SENDDIOBITSCOMMAND);
1361 up(&this_usbduxsub->sem);
1364 err = receive_dux_commands(dev, SENDDIOBITSCOMMAND);
1366 up(&this_usbduxsub->sem);
1370 data[1] = le16_to_cpu(this_usbduxsub->insn_buffer[1]);
1371 up(&this_usbduxsub->sem);
1375 /* reads the 4 counters, only two are used just now */
1376 static int usbdux_counter_read(struct comedi_device *dev,
1377 struct comedi_subdevice *s,
1378 struct comedi_insn *insn, unsigned int *data)
1380 struct usbdux_private *this_usbduxsub = dev->private;
1381 int chan = insn->chanspec;
1384 if (!this_usbduxsub)
1387 down(&this_usbduxsub->sem);
1388 err = send_dux_commands(dev, READCOUNTERCOMMAND);
1390 up(&this_usbduxsub->sem);
1394 err = receive_dux_commands(dev, READCOUNTERCOMMAND);
1396 up(&this_usbduxsub->sem);
1400 data[0] = le16_to_cpu(this_usbduxsub->insn_buffer[chan + 1]);
1401 up(&this_usbduxsub->sem);
1405 static int usbdux_counter_write(struct comedi_device *dev,
1406 struct comedi_subdevice *s,
1407 struct comedi_insn *insn, unsigned int *data)
1409 struct usbdux_private *this_usbduxsub = dev->private;
1412 if (!this_usbduxsub)
1415 down(&this_usbduxsub->sem);
1416 this_usbduxsub->dux_commands[1] = insn->chanspec;
1417 *((int16_t *) (this_usbduxsub->dux_commands + 2)) = cpu_to_le16(*data);
1419 err = send_dux_commands(dev, WRITECOUNTERCOMMAND);
1421 up(&this_usbduxsub->sem);
1425 up(&this_usbduxsub->sem);
1430 static int usbdux_counter_config(struct comedi_device *dev,
1431 struct comedi_subdevice *s,
1432 struct comedi_insn *insn, unsigned int *data)
1434 /* nothing to do so far */
1438 /***********************************/
1441 static int usbduxsub_unlink_pwm_urbs(struct usbdux_private *usbduxsub_tmp)
1445 if (usbduxsub_tmp && usbduxsub_tmp->urb_pwm) {
1446 if (usbduxsub_tmp->urb_pwm)
1447 usb_kill_urb(usbduxsub_tmp->urb_pwm);
1452 /* This cancels a running acquisition operation
1455 static int usbdux_pwm_stop(struct usbdux_private *this_usbduxsub, int do_unlink)
1459 if (!this_usbduxsub)
1463 ret = usbduxsub_unlink_pwm_urbs(this_usbduxsub);
1465 this_usbduxsub->pwm_cmd_running = 0;
1470 /* force unlink - is called by comedi */
1471 static int usbdux_pwm_cancel(struct comedi_device *dev,
1472 struct comedi_subdevice *s)
1474 struct usbdux_private *this_usbduxsub = dev->private;
1477 /* unlink only if it is really running */
1478 res = usbdux_pwm_stop(this_usbduxsub, this_usbduxsub->pwm_cmd_running);
1480 return send_dux_commands(dev, SENDPWMOFF);
1483 static void usbduxsub_pwm_irq(struct urb *urb)
1485 struct comedi_device *dev = urb->context;
1486 struct usbdux_private *devpriv = dev->private;
1489 switch (urb->status) {
1499 * after an unlink command, unplug, ... etc
1500 * no unlink needed here. Already shutting down.
1502 if (devpriv->pwm_cmd_running)
1503 usbdux_pwm_stop(devpriv, 0);
1509 if (devpriv->pwm_cmd_running) {
1510 dev_err(dev->class_dev,
1511 "Non-zero urb status received in pwm intr context: %d\n",
1513 usbdux_pwm_stop(devpriv, 0);
1518 /* are we actually running? */
1519 if (!devpriv->pwm_cmd_running)
1522 urb->transfer_buffer_length = devpriv->size_pwm_buf;
1523 urb->dev = devpriv->usbdev;
1525 if (devpriv->pwm_cmd_running) {
1526 ret = usb_submit_urb(urb, GFP_ATOMIC);
1528 dev_err(dev->class_dev,
1529 "pwm urb resubm failed in int-cont. ret=%d",
1531 if (ret == EL2NSYNC)
1532 dev_err(dev->class_dev,
1533 "buggy USB host controller or bug in IRQ handling!\n");
1535 /* don't do an unlink here */
1536 usbdux_pwm_stop(devpriv, 0);
1541 static int usbduxsub_submit_pwm_urbs(struct comedi_device *dev)
1543 struct usbdux_private *devpriv = dev->private;
1544 struct urb *urb = devpriv->urb_pwm;
1546 /* in case of a resubmission after an unlink... */
1547 usb_fill_bulk_urb(urb, devpriv->usbdev,
1548 usb_sndbulkpipe(devpriv->usbdev, PWM_EP),
1549 urb->transfer_buffer,
1550 devpriv->size_pwm_buf,
1554 return usb_submit_urb(urb, GFP_ATOMIC);
1557 static int usbdux_pwm_period(struct comedi_device *dev,
1558 struct comedi_subdevice *s, unsigned int period)
1560 struct usbdux_private *this_usbduxsub = dev->private;
1563 if (period < MIN_PWM_PERIOD) {
1566 fx2delay = period / ((int)(6 * 512 * (1.0 / 0.033))) - 6;
1570 this_usbduxsub->pwn_delay = fx2delay;
1571 this_usbduxsub->pwm_period = period;
1576 /* is called from insn so there's no need to do all the sanity checks */
1577 static int usbdux_pwm_start(struct comedi_device *dev,
1578 struct comedi_subdevice *s)
1581 struct usbdux_private *this_usbduxsub = dev->private;
1583 if (this_usbduxsub->pwm_cmd_running) {
1584 /* already running */
1588 this_usbduxsub->dux_commands[1] = ((int8_t) this_usbduxsub->pwn_delay);
1589 ret = send_dux_commands(dev, SENDPWMON);
1593 /* initialise the buffer */
1594 for (i = 0; i < this_usbduxsub->size_pwm_buf; i++)
1595 ((char *)(this_usbduxsub->urb_pwm->transfer_buffer))[i] = 0;
1597 this_usbduxsub->pwm_cmd_running = 1;
1598 ret = usbduxsub_submit_pwm_urbs(dev);
1600 this_usbduxsub->pwm_cmd_running = 0;
1606 /* generates the bit pattern for PWM with the optional sign bit */
1607 static int usbdux_pwm_pattern(struct comedi_device *dev,
1608 struct comedi_subdevice *s, int channel,
1609 unsigned int value, unsigned int sign)
1611 struct usbdux_private *this_usbduxsub = dev->private;
1618 if (!this_usbduxsub)
1621 /* this is the DIO bit which carries the PWM data */
1622 pwm_mask = (1 << channel);
1623 /* this is the DIO bit which carries the optional direction bit */
1624 sgn_mask = (16 << channel);
1625 /* this is the buffer which will be filled with the with bit */
1626 /* pattern for one period */
1627 szbuf = this_usbduxsub->size_pwm_buf;
1628 p_buf = (char *)(this_usbduxsub->urb_pwm->transfer_buffer);
1629 for (i = 0; i < szbuf; i++) {
1632 c = c & (~pwm_mask);
1633 /* set the bit as long as the index is lower than the value */
1636 /* set the optional sign bit for a relay */
1638 /* positive value */
1639 c = c & (~sgn_mask);
1641 /* negative value */
1649 static int usbdux_pwm_write(struct comedi_device *dev,
1650 struct comedi_subdevice *s,
1651 struct comedi_insn *insn, unsigned int *data)
1653 struct usbdux_private *this_usbduxsub = dev->private;
1655 if (!this_usbduxsub)
1658 if ((insn->n) != 1) {
1660 * doesn't make sense to have more than one value here because
1661 * it would just overwrite the PWM buffer a couple of times
1667 * the sign is set via a special INSN only, this gives us 8 bits for
1669 * relay sign 0 by default
1671 return usbdux_pwm_pattern(dev, s, CR_CHAN(insn->chanspec), data[0], 0);
1674 static int usbdux_pwm_read(struct comedi_device *x1,
1675 struct comedi_subdevice *x2, struct comedi_insn *x3,
1682 /* switches on/off PWM */
1683 static int usbdux_pwm_config(struct comedi_device *dev,
1684 struct comedi_subdevice *s,
1685 struct comedi_insn *insn, unsigned int *data)
1687 struct usbdux_private *this_usbduxsub = dev->private;
1689 case INSN_CONFIG_ARM:
1692 * if not zero the PWM is limited to a certain time which is
1693 * not supported here
1697 return usbdux_pwm_start(dev, s);
1698 case INSN_CONFIG_DISARM:
1699 return usbdux_pwm_cancel(dev, s);
1700 case INSN_CONFIG_GET_PWM_STATUS:
1702 * to check if the USB transmission has failed or in case PWM
1703 * was limited to n cycles to check if it has terminated
1705 data[1] = this_usbduxsub->pwm_cmd_running;
1707 case INSN_CONFIG_PWM_SET_PERIOD:
1708 return usbdux_pwm_period(dev, s, data[1]);
1709 case INSN_CONFIG_PWM_GET_PERIOD:
1710 data[1] = this_usbduxsub->pwm_period;
1712 case INSN_CONFIG_PWM_SET_H_BRIDGE:
1713 /* value in the first byte and the sign in the second for a
1715 return usbdux_pwm_pattern(dev, s,
1716 /* the channel number */
1717 CR_CHAN(insn->chanspec),
1718 /* actual PWM data */
1722 case INSN_CONFIG_PWM_GET_H_BRIDGE:
1723 /* values are not kept in this driver, nothing to return here */
1730 /*****************************************************************/
1732 static int usbdux_alloc_usb_buffers(struct comedi_device *dev)
1734 struct usbdux_private *devpriv = dev->private;
1738 /* create space for the commands of the DA converter */
1739 devpriv->dac_commands = kzalloc(NUMOUTCHANNELS, GFP_KERNEL);
1740 if (!devpriv->dac_commands)
1743 /* create space for the commands going to the usb device */
1744 devpriv->dux_commands = kzalloc(SIZEOFDUXBUFFER, GFP_KERNEL);
1745 if (!devpriv->dux_commands)
1748 /* create space for the in buffer and set it to zero */
1749 devpriv->in_buffer = kzalloc(SIZEINBUF, GFP_KERNEL);
1750 if (!devpriv->in_buffer)
1753 /* create space of the instruction buffer */
1754 devpriv->insn_buffer = kzalloc(SIZEINSNBUF, GFP_KERNEL);
1755 if (!devpriv->insn_buffer)
1758 /* create space for the outbuffer */
1759 devpriv->out_buffer = kzalloc(SIZEOUTBUF, GFP_KERNEL);
1760 if (!devpriv->out_buffer)
1764 devpriv->urb_in = kcalloc(devpriv->num_in_buffers, sizeof(*urb),
1766 if (!devpriv->urb_in)
1769 for (i = 0; i < devpriv->num_in_buffers; i++) {
1770 /* one frame: 1ms */
1771 urb = usb_alloc_urb(1, GFP_KERNEL);
1774 devpriv->urb_in[i] = urb;
1776 urb->dev = devpriv->usbdev;
1777 /* will be filled later with a pointer to the comedi-device */
1778 /* and ONLY then the urb should be submitted */
1779 urb->context = NULL;
1780 urb->pipe = usb_rcvisocpipe(devpriv->usbdev, ISOINEP);
1781 urb->transfer_flags = URB_ISO_ASAP;
1782 urb->transfer_buffer = kzalloc(SIZEINBUF, GFP_KERNEL);
1783 if (!urb->transfer_buffer)
1786 urb->complete = usbduxsub_ai_isoc_irq;
1787 urb->number_of_packets = 1;
1788 urb->transfer_buffer_length = SIZEINBUF;
1789 urb->iso_frame_desc[0].offset = 0;
1790 urb->iso_frame_desc[0].length = SIZEINBUF;
1794 devpriv->urb_out = kcalloc(devpriv->num_out_buffers, sizeof(*urb),
1796 if (!devpriv->urb_out)
1799 for (i = 0; i < devpriv->num_out_buffers; i++) {
1800 /* one frame: 1ms */
1801 urb = usb_alloc_urb(1, GFP_KERNEL);
1804 devpriv->urb_out[i] = urb;
1806 urb->dev = devpriv->usbdev;
1807 /* will be filled later with a pointer to the comedi-device */
1808 /* and ONLY then the urb should be submitted */
1809 urb->context = NULL;
1810 urb->pipe = usb_sndisocpipe(devpriv->usbdev, ISOOUTEP);
1811 urb->transfer_flags = URB_ISO_ASAP;
1812 urb->transfer_buffer = kzalloc(SIZEOUTBUF, GFP_KERNEL);
1813 if (!urb->transfer_buffer)
1816 urb->complete = usbduxsub_ao_isoc_irq;
1817 urb->number_of_packets = 1;
1818 urb->transfer_buffer_length = SIZEOUTBUF;
1819 urb->iso_frame_desc[0].offset = 0;
1820 urb->iso_frame_desc[0].length = SIZEOUTBUF;
1821 if (devpriv->high_speed)
1822 urb->interval = 8; /* uframes */
1824 urb->interval = 1; /* frames */
1828 if (devpriv->size_pwm_buf) {
1829 urb = usb_alloc_urb(0, GFP_KERNEL);
1832 devpriv->urb_pwm = urb;
1834 /* max bulk ep size in high speed */
1835 urb->transfer_buffer = kzalloc(devpriv->size_pwm_buf,
1837 if (!urb->transfer_buffer)
1844 static void usbdux_free_usb_buffers(struct usbdux_private *devpriv)
1849 urb = devpriv->urb_pwm;
1851 kfree(urb->transfer_buffer);
1855 if (devpriv->urb_out) {
1856 for (i = 0; i < devpriv->num_out_buffers; i++) {
1857 urb = devpriv->urb_out[i];
1859 kfree(urb->transfer_buffer);
1864 kfree(devpriv->urb_out);
1866 if (devpriv->urb_in) {
1867 for (i = 0; i < devpriv->num_in_buffers; i++) {
1868 urb = devpriv->urb_in[i];
1870 kfree(urb->transfer_buffer);
1875 kfree(devpriv->urb_in);
1877 kfree(devpriv->out_buffer);
1878 kfree(devpriv->insn_buffer);
1879 kfree(devpriv->in_buffer);
1880 kfree(devpriv->dux_commands);
1881 kfree(devpriv->dac_commands);
1884 static int usbdux_auto_attach(struct comedi_device *dev,
1885 unsigned long context_unused)
1887 struct usb_interface *intf = comedi_to_usb_interface(dev);
1888 struct usb_device *usb = comedi_to_usb_dev(dev);
1889 struct usbdux_private *devpriv;
1890 struct comedi_subdevice *s;
1893 devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
1897 sema_init(&devpriv->sem, 1);
1899 devpriv->usbdev = usb;
1900 devpriv->ifnum = intf->altsetting->desc.bInterfaceNumber;
1901 usb_set_intfdata(intf, devpriv);
1903 devpriv->high_speed = (devpriv->usbdev->speed == USB_SPEED_HIGH);
1904 if (devpriv->high_speed) {
1905 devpriv->num_in_buffers = NUMOFINBUFFERSHIGH;
1906 devpriv->num_out_buffers = NUMOFOUTBUFFERSHIGH;
1907 devpriv->size_pwm_buf = 512;
1909 devpriv->num_in_buffers = NUMOFINBUFFERSFULL;
1910 devpriv->num_out_buffers = NUMOFOUTBUFFERSFULL;
1913 ret = usbdux_alloc_usb_buffers(dev);
1917 /* setting to alternate setting 3: enabling iso ep and bulk ep. */
1918 ret = usb_set_interface(devpriv->usbdev, devpriv->ifnum, 3);
1920 dev_err(dev->class_dev,
1921 "could not set alternate setting 3 in high speed\n");
1925 ret = comedi_load_firmware(dev, &usb->dev, FIRMWARE,
1926 usbdux_firmware_upload, 0);
1930 ret = comedi_alloc_subdevices(dev, (devpriv->high_speed) ? 5 : 4);
1934 /* Analog Input subdevice */
1935 s = &dev->subdevices[0];
1936 dev->read_subdev = s;
1937 s->type = COMEDI_SUBD_AI;
1938 s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ;
1940 s->maxdata = 0x0fff;
1941 s->len_chanlist = 8;
1942 s->range_table = &range_usbdux_ai_range;
1943 s->insn_read = usbdux_ai_insn_read;
1944 s->do_cmdtest = usbdux_ai_cmdtest;
1945 s->do_cmd = usbdux_ai_cmd;
1946 s->cancel = usbdux_ai_cancel;
1948 /* Analog Output subdevice */
1949 s = &dev->subdevices[1];
1950 dev->write_subdev = s;
1951 s->type = COMEDI_SUBD_AO;
1952 s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_CMD_WRITE;
1954 s->maxdata = 0x0fff;
1955 s->len_chanlist = 4;
1956 s->range_table = &range_usbdux_ao_range;
1957 s->do_cmdtest = usbdux_ao_cmdtest;
1958 s->do_cmd = usbdux_ao_cmd;
1959 s->cancel = usbdux_ao_cancel;
1960 s->insn_read = usbdux_ao_insn_read;
1961 s->insn_write = usbdux_ao_insn_write;
1963 /* Digital I/O subdevice */
1964 s = &dev->subdevices[2];
1965 s->type = COMEDI_SUBD_DIO;
1966 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
1969 s->range_table = &range_digital;
1970 s->insn_bits = usbdux_dio_insn_bits;
1971 s->insn_config = usbdux_dio_insn_config;
1973 /* Counter subdevice */
1974 s = &dev->subdevices[3];
1975 s->type = COMEDI_SUBD_COUNTER;
1976 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
1978 s->maxdata = 0xffff;
1979 s->insn_read = usbdux_counter_read;
1980 s->insn_write = usbdux_counter_write;
1981 s->insn_config = usbdux_counter_config;
1983 if (devpriv->high_speed) {
1985 s = &dev->subdevices[4];
1986 s->type = COMEDI_SUBD_PWM;
1987 s->subdev_flags = SDF_WRITABLE | SDF_PWM_HBRIDGE;
1989 s->maxdata = devpriv->size_pwm_buf;
1990 s->insn_write = usbdux_pwm_write;
1991 s->insn_read = usbdux_pwm_read;
1992 s->insn_config = usbdux_pwm_config;
1994 usbdux_pwm_period(dev, s, PWM_DEFAULT_PERIOD);
2000 static void usbdux_detach(struct comedi_device *dev)
2002 struct usb_interface *intf = comedi_to_usb_interface(dev);
2003 struct usbdux_private *devpriv = dev->private;
2006 down(&devpriv->sem);
2008 usb_set_intfdata(intf, NULL);
2010 if (devpriv->pwm_cmd_running)
2011 usbduxsub_unlink_pwm_urbs(devpriv);
2012 if (devpriv->ao_cmd_running)
2013 usbduxsub_unlink_outurbs(devpriv);
2014 if (devpriv->ai_cmd_running)
2015 usbduxsub_unlink_inurbs(devpriv);
2017 usbdux_free_usb_buffers(devpriv);
2023 static struct comedi_driver usbdux_driver = {
2024 .driver_name = "usbdux",
2025 .module = THIS_MODULE,
2026 .auto_attach = usbdux_auto_attach,
2027 .detach = usbdux_detach,
2030 static int usbdux_usb_probe(struct usb_interface *intf,
2031 const struct usb_device_id *id)
2033 return comedi_usb_auto_config(intf, &usbdux_driver, 0);
2036 static const struct usb_device_id usbdux_usb_table[] = {
2037 { USB_DEVICE(0x13d8, 0x0001) },
2038 { USB_DEVICE(0x13d8, 0x0002) },
2041 MODULE_DEVICE_TABLE(usb, usbdux_usb_table);
2043 static struct usb_driver usbdux_usb_driver = {
2045 .probe = usbdux_usb_probe,
2046 .disconnect = comedi_usb_auto_unconfig,
2047 .id_table = usbdux_usb_table,
2049 module_comedi_usb_driver(usbdux_driver, usbdux_usb_driver);
2051 MODULE_AUTHOR("Bernd Porr, BerndPorr@f2s.com");
2052 MODULE_DESCRIPTION("Stirling/ITL USB-DUX -- Bernd.Porr@f2s.com");
2053 MODULE_LICENSE("GPL");
2054 MODULE_FIRMWARE(FIRMWARE);