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 usbdux_private *this_usbduxsub, int command)
865 int result = (-EFAULT);
869 for (i = 0; i < RETRIES; i++) {
870 result = usb_bulk_msg(this_usbduxsub->usbdev,
871 usb_rcvbulkpipe(this_usbduxsub->usbdev,
873 this_usbduxsub->insn_buffer, SIZEINSNBUF,
874 &nrec, BULK_TIMEOUT);
877 if (le16_to_cpu(this_usbduxsub->insn_buffer[0]) == command)
880 /* this is only reached if the data has been requested a couple of
885 static int usbdux_ai_inttrig(struct comedi_device *dev,
886 struct comedi_subdevice *s, unsigned int trignum)
889 struct usbdux_private *this_usbduxsub = dev->private;
893 down(&this_usbduxsub->sem);
896 up(&this_usbduxsub->sem);
899 if (!(this_usbduxsub->ai_cmd_running)) {
900 this_usbduxsub->ai_cmd_running = 1;
901 ret = usbduxsub_submit_inurbs(dev);
903 this_usbduxsub->ai_cmd_running = 0;
904 up(&this_usbduxsub->sem);
907 s->async->inttrig = NULL;
909 up(&this_usbduxsub->sem);
913 static int usbdux_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
915 struct comedi_cmd *cmd = &s->async->cmd;
916 unsigned int chan, range;
918 struct usbdux_private *this_usbduxsub = dev->private;
924 /* block other CPUs from starting an ai_cmd */
925 down(&this_usbduxsub->sem);
926 if (this_usbduxsub->ai_cmd_running) {
927 up(&this_usbduxsub->sem);
930 /* set current channel of the running acquisition to zero */
931 s->async->cur_chan = 0;
933 this_usbduxsub->dux_commands[1] = cmd->chanlist_len;
934 for (i = 0; i < cmd->chanlist_len; ++i) {
935 chan = CR_CHAN(cmd->chanlist[i]);
936 range = CR_RANGE(cmd->chanlist[i]);
937 if (i >= NUMCHANNELS)
939 this_usbduxsub->dux_commands[i + 2] =
940 create_adc_command(chan, range);
943 result = send_dux_commands(dev, SENDADCOMMANDS);
945 up(&this_usbduxsub->sem);
949 if (this_usbduxsub->high_speed) {
951 * every channel gets a time window of 125us. Thus, if we
952 * sample all 8 channels we need 1ms. If we sample only one
953 * channel we need only 125us
955 this_usbduxsub->ai_interval = 1;
956 /* find a power of 2 for the interval */
957 while ((this_usbduxsub->ai_interval) < (cmd->chanlist_len)) {
958 this_usbduxsub->ai_interval =
959 (this_usbduxsub->ai_interval) * 2;
961 this_usbduxsub->ai_timer = cmd->scan_begin_arg / (125000 *
965 /* interval always 1ms */
966 this_usbduxsub->ai_interval = 1;
967 this_usbduxsub->ai_timer = cmd->scan_begin_arg / 1000000;
969 if (this_usbduxsub->ai_timer < 1) {
970 up(&this_usbduxsub->sem);
973 this_usbduxsub->ai_counter = this_usbduxsub->ai_timer;
975 if (cmd->stop_src == TRIG_COUNT) {
976 /* data arrives as one packet */
977 this_usbduxsub->ai_sample_count = cmd->stop_arg;
978 this_usbduxsub->ai_continous = 0;
980 /* continous acquisition */
981 this_usbduxsub->ai_continous = 1;
982 this_usbduxsub->ai_sample_count = 0;
985 if (cmd->start_src == TRIG_NOW) {
986 /* enable this acquisition operation */
987 this_usbduxsub->ai_cmd_running = 1;
988 ret = usbduxsub_submit_inurbs(dev);
990 this_usbduxsub->ai_cmd_running = 0;
991 /* fixme: unlink here?? */
992 up(&this_usbduxsub->sem);
995 s->async->inttrig = NULL;
998 /* don't enable the acquision operation */
999 /* wait for an internal signal */
1000 s->async->inttrig = usbdux_ai_inttrig;
1002 up(&this_usbduxsub->sem);
1006 /* Mode 0 is used to get a single conversion on demand */
1007 static int usbdux_ai_insn_read(struct comedi_device *dev,
1008 struct comedi_subdevice *s,
1009 struct comedi_insn *insn, unsigned int *data)
1012 unsigned int one = 0;
1015 struct usbdux_private *this_usbduxsub = dev->private;
1017 if (!this_usbduxsub)
1020 down(&this_usbduxsub->sem);
1021 if (this_usbduxsub->ai_cmd_running) {
1022 up(&this_usbduxsub->sem);
1026 /* sample one channel */
1027 chan = CR_CHAN(insn->chanspec);
1028 range = CR_RANGE(insn->chanspec);
1029 /* set command for the first channel */
1030 this_usbduxsub->dux_commands[1] = create_adc_command(chan, range);
1033 err = send_dux_commands(dev, SENDSINGLEAD);
1035 up(&this_usbduxsub->sem);
1039 for (i = 0; i < insn->n; i++) {
1040 err = receive_dux_commands(this_usbduxsub, SENDSINGLEAD);
1042 up(&this_usbduxsub->sem);
1045 one = le16_to_cpu(this_usbduxsub->insn_buffer[1]);
1046 if (CR_RANGE(insn->chanspec) <= 1)
1051 up(&this_usbduxsub->sem);
1055 /************************************/
1058 static int usbdux_ao_insn_read(struct comedi_device *dev,
1059 struct comedi_subdevice *s,
1060 struct comedi_insn *insn, unsigned int *data)
1063 int chan = CR_CHAN(insn->chanspec);
1064 struct usbdux_private *this_usbduxsub = dev->private;
1066 if (!this_usbduxsub)
1069 down(&this_usbduxsub->sem);
1070 for (i = 0; i < insn->n; i++)
1071 data[i] = this_usbduxsub->out_buffer[chan];
1073 up(&this_usbduxsub->sem);
1077 static int usbdux_ao_insn_write(struct comedi_device *dev,
1078 struct comedi_subdevice *s,
1079 struct comedi_insn *insn, unsigned int *data)
1082 int chan = CR_CHAN(insn->chanspec);
1083 struct usbdux_private *this_usbduxsub = dev->private;
1085 if (!this_usbduxsub)
1088 down(&this_usbduxsub->sem);
1089 if (this_usbduxsub->ao_cmd_running) {
1090 up(&this_usbduxsub->sem);
1094 for (i = 0; i < insn->n; i++) {
1095 /* number of channels: 1 */
1096 this_usbduxsub->dux_commands[1] = 1;
1097 /* one 16 bit value */
1098 *((int16_t *) (this_usbduxsub->dux_commands + 2)) =
1099 cpu_to_le16(data[i]);
1100 this_usbduxsub->out_buffer[chan] = data[i];
1101 /* channel number */
1102 this_usbduxsub->dux_commands[4] = (chan << 6);
1103 err = send_dux_commands(dev, SENDDACOMMANDS);
1105 up(&this_usbduxsub->sem);
1109 up(&this_usbduxsub->sem);
1114 static int usbdux_ao_inttrig(struct comedi_device *dev,
1115 struct comedi_subdevice *s, unsigned int trignum)
1118 struct usbdux_private *this_usbduxsub = dev->private;
1120 if (!this_usbduxsub)
1123 down(&this_usbduxsub->sem);
1125 up(&this_usbduxsub->sem);
1128 if (!(this_usbduxsub->ao_cmd_running)) {
1129 this_usbduxsub->ao_cmd_running = 1;
1130 ret = usbduxsub_submit_outurbs(dev);
1132 this_usbduxsub->ao_cmd_running = 0;
1133 up(&this_usbduxsub->sem);
1136 s->async->inttrig = NULL;
1138 up(&this_usbduxsub->sem);
1142 static int usbdux_ao_cmdtest(struct comedi_device *dev,
1143 struct comedi_subdevice *s, struct comedi_cmd *cmd)
1145 struct usbdux_private *this_usbduxsub = dev->private;
1149 if (!this_usbduxsub)
1152 /* Step 1 : check if triggers are trivially valid */
1154 err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
1156 if (0) { /* (this_usbduxsub->high_speed) */
1157 /* the sampling rate is set by the coversion rate */
1158 flags = TRIG_FOLLOW;
1160 /* start a new scan (output at once) with a timer */
1163 err |= cfc_check_trigger_src(&cmd->scan_begin_src, flags);
1165 if (0) { /* (this_usbduxsub->high_speed) */
1167 * in usb-2.0 only one conversion it transmitted
1173 * all conversion events happen simultaneously with
1178 err |= cfc_check_trigger_src(&cmd->convert_src, flags);
1180 err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
1181 err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
1186 /* Step 2a : make sure trigger sources are unique */
1188 err |= cfc_check_trigger_is_unique(cmd->start_src);
1189 err |= cfc_check_trigger_is_unique(cmd->stop_src);
1191 /* Step 2b : and mutually compatible */
1196 /* Step 3: check if arguments are trivially valid */
1198 err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
1200 if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */
1201 err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
1203 if (cmd->scan_begin_src == TRIG_TIMER)
1204 err |= cfc_check_trigger_arg_min(&cmd->scan_begin_arg,
1207 /* not used now, is for later use */
1208 if (cmd->convert_src == TRIG_TIMER)
1209 err |= cfc_check_trigger_arg_min(&cmd->convert_arg, 125000);
1211 err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, cmd->chanlist_len);
1213 if (cmd->stop_src == TRIG_COUNT) {
1214 /* any count is allowed */
1217 err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0);
1226 static int usbdux_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
1228 struct comedi_cmd *cmd = &s->async->cmd;
1229 unsigned int chan, gain;
1231 struct usbdux_private *this_usbduxsub = dev->private;
1233 if (!this_usbduxsub)
1236 down(&this_usbduxsub->sem);
1238 /* set current channel of the running acquisition to zero */
1239 s->async->cur_chan = 0;
1240 for (i = 0; i < cmd->chanlist_len; ++i) {
1241 chan = CR_CHAN(cmd->chanlist[i]);
1242 gain = CR_RANGE(cmd->chanlist[i]);
1243 if (i >= NUMOUTCHANNELS)
1245 this_usbduxsub->dac_commands[i] = (chan << 6);
1248 /* we count in steps of 1ms (125us) */
1249 /* 125us mode not used yet */
1250 if (0) { /* (this_usbduxsub->high_speed) */
1252 /* timing of the conversion itself: every 125 us */
1253 this_usbduxsub->ao_timer = cmd->convert_arg / 125000;
1256 /* timing of the scan: we get all channels at once */
1257 this_usbduxsub->ao_timer = cmd->scan_begin_arg / 1000000;
1258 if (this_usbduxsub->ao_timer < 1) {
1259 up(&this_usbduxsub->sem);
1263 this_usbduxsub->ao_counter = this_usbduxsub->ao_timer;
1265 if (cmd->stop_src == TRIG_COUNT) {
1266 /* not continuous */
1268 /* high speed also scans everything at once */
1269 if (0) { /* (this_usbduxsub->high_speed) */
1270 this_usbduxsub->ao_sample_count =
1271 (cmd->stop_arg) * (cmd->scan_end_arg);
1273 /* there's no scan as the scan has been */
1274 /* perf inside the FX2 */
1275 /* data arrives as one packet */
1276 this_usbduxsub->ao_sample_count = cmd->stop_arg;
1278 this_usbduxsub->ao_continous = 0;
1280 /* continous acquisition */
1281 this_usbduxsub->ao_continous = 1;
1282 this_usbduxsub->ao_sample_count = 0;
1285 if (cmd->start_src == TRIG_NOW) {
1286 /* enable this acquisition operation */
1287 this_usbduxsub->ao_cmd_running = 1;
1288 ret = usbduxsub_submit_outurbs(dev);
1290 this_usbduxsub->ao_cmd_running = 0;
1291 /* fixme: unlink here?? */
1292 up(&this_usbduxsub->sem);
1295 s->async->inttrig = NULL;
1298 /* submit the urbs later */
1299 /* wait for an internal signal */
1300 s->async->inttrig = usbdux_ao_inttrig;
1303 up(&this_usbduxsub->sem);
1307 static int usbdux_dio_insn_config(struct comedi_device *dev,
1308 struct comedi_subdevice *s,
1309 struct comedi_insn *insn, unsigned int *data)
1311 int chan = CR_CHAN(insn->chanspec);
1313 /* The input or output configuration of each digital line is
1314 * configured by a special insn_config instruction. chanspec
1315 * contains the channel to be changed, and data[0] contains the
1316 * value COMEDI_INPUT or COMEDI_OUTPUT. */
1319 case INSN_CONFIG_DIO_OUTPUT:
1320 s->io_bits |= 1 << chan; /* 1 means Out */
1322 case INSN_CONFIG_DIO_INPUT:
1323 s->io_bits &= ~(1 << chan);
1325 case INSN_CONFIG_DIO_QUERY:
1327 (s->io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT;
1333 /* we don't tell the firmware here as it would take 8 frames */
1334 /* to submit the information. We do it in the insn_bits. */
1338 static int usbdux_dio_insn_bits(struct comedi_device *dev,
1339 struct comedi_subdevice *s,
1340 struct comedi_insn *insn, unsigned int *data)
1343 struct usbdux_private *this_usbduxsub = dev->private;
1346 if (!this_usbduxsub)
1349 down(&this_usbduxsub->sem);
1351 /* The insn data is a mask in data[0] and the new data
1352 * in data[1], each channel cooresponding to a bit. */
1353 s->state &= ~data[0];
1354 s->state |= data[0] & data[1];
1355 this_usbduxsub->dux_commands[1] = s->io_bits;
1356 this_usbduxsub->dux_commands[2] = s->state;
1358 /* This command also tells the firmware to return */
1359 /* the digital input lines */
1360 err = send_dux_commands(dev, SENDDIOBITSCOMMAND);
1362 up(&this_usbduxsub->sem);
1365 err = receive_dux_commands(this_usbduxsub, SENDDIOBITSCOMMAND);
1367 up(&this_usbduxsub->sem);
1371 data[1] = le16_to_cpu(this_usbduxsub->insn_buffer[1]);
1372 up(&this_usbduxsub->sem);
1376 /* reads the 4 counters, only two are used just now */
1377 static int usbdux_counter_read(struct comedi_device *dev,
1378 struct comedi_subdevice *s,
1379 struct comedi_insn *insn, unsigned int *data)
1381 struct usbdux_private *this_usbduxsub = dev->private;
1382 int chan = insn->chanspec;
1385 if (!this_usbduxsub)
1388 down(&this_usbduxsub->sem);
1389 err = send_dux_commands(dev, READCOUNTERCOMMAND);
1391 up(&this_usbduxsub->sem);
1395 err = receive_dux_commands(this_usbduxsub, READCOUNTERCOMMAND);
1397 up(&this_usbduxsub->sem);
1401 data[0] = le16_to_cpu(this_usbduxsub->insn_buffer[chan + 1]);
1402 up(&this_usbduxsub->sem);
1406 static int usbdux_counter_write(struct comedi_device *dev,
1407 struct comedi_subdevice *s,
1408 struct comedi_insn *insn, unsigned int *data)
1410 struct usbdux_private *this_usbduxsub = dev->private;
1413 if (!this_usbduxsub)
1416 down(&this_usbduxsub->sem);
1417 this_usbduxsub->dux_commands[1] = insn->chanspec;
1418 *((int16_t *) (this_usbduxsub->dux_commands + 2)) = cpu_to_le16(*data);
1420 err = send_dux_commands(dev, WRITECOUNTERCOMMAND);
1422 up(&this_usbduxsub->sem);
1426 up(&this_usbduxsub->sem);
1431 static int usbdux_counter_config(struct comedi_device *dev,
1432 struct comedi_subdevice *s,
1433 struct comedi_insn *insn, unsigned int *data)
1435 /* nothing to do so far */
1439 /***********************************/
1442 static int usbduxsub_unlink_pwm_urbs(struct usbdux_private *usbduxsub_tmp)
1446 if (usbduxsub_tmp && usbduxsub_tmp->urb_pwm) {
1447 if (usbduxsub_tmp->urb_pwm)
1448 usb_kill_urb(usbduxsub_tmp->urb_pwm);
1453 /* This cancels a running acquisition operation
1456 static int usbdux_pwm_stop(struct usbdux_private *this_usbduxsub, int do_unlink)
1460 if (!this_usbduxsub)
1464 ret = usbduxsub_unlink_pwm_urbs(this_usbduxsub);
1466 this_usbduxsub->pwm_cmd_running = 0;
1471 /* force unlink - is called by comedi */
1472 static int usbdux_pwm_cancel(struct comedi_device *dev,
1473 struct comedi_subdevice *s)
1475 struct usbdux_private *this_usbduxsub = dev->private;
1478 /* unlink only if it is really running */
1479 res = usbdux_pwm_stop(this_usbduxsub, this_usbduxsub->pwm_cmd_running);
1481 return send_dux_commands(dev, SENDPWMOFF);
1484 static void usbduxsub_pwm_irq(struct urb *urb)
1486 struct comedi_device *dev = urb->context;
1487 struct usbdux_private *devpriv = dev->private;
1490 switch (urb->status) {
1500 * after an unlink command, unplug, ... etc
1501 * no unlink needed here. Already shutting down.
1503 if (devpriv->pwm_cmd_running)
1504 usbdux_pwm_stop(devpriv, 0);
1510 if (devpriv->pwm_cmd_running) {
1511 dev_err(dev->class_dev,
1512 "Non-zero urb status received in pwm intr context: %d\n",
1514 usbdux_pwm_stop(devpriv, 0);
1519 /* are we actually running? */
1520 if (!devpriv->pwm_cmd_running)
1523 urb->transfer_buffer_length = devpriv->size_pwm_buf;
1524 urb->dev = devpriv->usbdev;
1526 if (devpriv->pwm_cmd_running) {
1527 ret = usb_submit_urb(urb, GFP_ATOMIC);
1529 dev_err(dev->class_dev,
1530 "pwm urb resubm failed in int-cont. ret=%d",
1532 if (ret == EL2NSYNC)
1533 dev_err(dev->class_dev,
1534 "buggy USB host controller or bug in IRQ handling!\n");
1536 /* don't do an unlink here */
1537 usbdux_pwm_stop(devpriv, 0);
1542 static int usbduxsub_submit_pwm_urbs(struct comedi_device *dev)
1544 struct usbdux_private *devpriv = dev->private;
1545 struct urb *urb = devpriv->urb_pwm;
1547 /* in case of a resubmission after an unlink... */
1548 usb_fill_bulk_urb(urb, devpriv->usbdev,
1549 usb_sndbulkpipe(devpriv->usbdev, PWM_EP),
1550 urb->transfer_buffer,
1551 devpriv->size_pwm_buf,
1555 return usb_submit_urb(urb, GFP_ATOMIC);
1558 static int usbdux_pwm_period(struct comedi_device *dev,
1559 struct comedi_subdevice *s, unsigned int period)
1561 struct usbdux_private *this_usbduxsub = dev->private;
1564 if (period < MIN_PWM_PERIOD) {
1567 fx2delay = period / ((int)(6 * 512 * (1.0 / 0.033))) - 6;
1571 this_usbduxsub->pwn_delay = fx2delay;
1572 this_usbduxsub->pwm_period = period;
1577 /* is called from insn so there's no need to do all the sanity checks */
1578 static int usbdux_pwm_start(struct comedi_device *dev,
1579 struct comedi_subdevice *s)
1582 struct usbdux_private *this_usbduxsub = dev->private;
1584 if (this_usbduxsub->pwm_cmd_running) {
1585 /* already running */
1589 this_usbduxsub->dux_commands[1] = ((int8_t) this_usbduxsub->pwn_delay);
1590 ret = send_dux_commands(dev, SENDPWMON);
1594 /* initialise the buffer */
1595 for (i = 0; i < this_usbduxsub->size_pwm_buf; i++)
1596 ((char *)(this_usbduxsub->urb_pwm->transfer_buffer))[i] = 0;
1598 this_usbduxsub->pwm_cmd_running = 1;
1599 ret = usbduxsub_submit_pwm_urbs(dev);
1601 this_usbduxsub->pwm_cmd_running = 0;
1607 /* generates the bit pattern for PWM with the optional sign bit */
1608 static int usbdux_pwm_pattern(struct comedi_device *dev,
1609 struct comedi_subdevice *s, int channel,
1610 unsigned int value, unsigned int sign)
1612 struct usbdux_private *this_usbduxsub = dev->private;
1619 if (!this_usbduxsub)
1622 /* this is the DIO bit which carries the PWM data */
1623 pwm_mask = (1 << channel);
1624 /* this is the DIO bit which carries the optional direction bit */
1625 sgn_mask = (16 << channel);
1626 /* this is the buffer which will be filled with the with bit */
1627 /* pattern for one period */
1628 szbuf = this_usbduxsub->size_pwm_buf;
1629 p_buf = (char *)(this_usbduxsub->urb_pwm->transfer_buffer);
1630 for (i = 0; i < szbuf; i++) {
1633 c = c & (~pwm_mask);
1634 /* set the bit as long as the index is lower than the value */
1637 /* set the optional sign bit for a relay */
1639 /* positive value */
1640 c = c & (~sgn_mask);
1642 /* negative value */
1650 static int usbdux_pwm_write(struct comedi_device *dev,
1651 struct comedi_subdevice *s,
1652 struct comedi_insn *insn, unsigned int *data)
1654 struct usbdux_private *this_usbduxsub = dev->private;
1656 if (!this_usbduxsub)
1659 if ((insn->n) != 1) {
1661 * doesn't make sense to have more than one value here because
1662 * it would just overwrite the PWM buffer a couple of times
1668 * the sign is set via a special INSN only, this gives us 8 bits for
1670 * relay sign 0 by default
1672 return usbdux_pwm_pattern(dev, s, CR_CHAN(insn->chanspec), data[0], 0);
1675 static int usbdux_pwm_read(struct comedi_device *x1,
1676 struct comedi_subdevice *x2, struct comedi_insn *x3,
1683 /* switches on/off PWM */
1684 static int usbdux_pwm_config(struct comedi_device *dev,
1685 struct comedi_subdevice *s,
1686 struct comedi_insn *insn, unsigned int *data)
1688 struct usbdux_private *this_usbduxsub = dev->private;
1690 case INSN_CONFIG_ARM:
1693 * if not zero the PWM is limited to a certain time which is
1694 * not supported here
1698 return usbdux_pwm_start(dev, s);
1699 case INSN_CONFIG_DISARM:
1700 return usbdux_pwm_cancel(dev, s);
1701 case INSN_CONFIG_GET_PWM_STATUS:
1703 * to check if the USB transmission has failed or in case PWM
1704 * was limited to n cycles to check if it has terminated
1706 data[1] = this_usbduxsub->pwm_cmd_running;
1708 case INSN_CONFIG_PWM_SET_PERIOD:
1709 return usbdux_pwm_period(dev, s, data[1]);
1710 case INSN_CONFIG_PWM_GET_PERIOD:
1711 data[1] = this_usbduxsub->pwm_period;
1713 case INSN_CONFIG_PWM_SET_H_BRIDGE:
1714 /* value in the first byte and the sign in the second for a
1716 return usbdux_pwm_pattern(dev, s,
1717 /* the channel number */
1718 CR_CHAN(insn->chanspec),
1719 /* actual PWM data */
1723 case INSN_CONFIG_PWM_GET_H_BRIDGE:
1724 /* values are not kept in this driver, nothing to return here */
1731 /*****************************************************************/
1733 static int usbdux_alloc_usb_buffers(struct usbdux_private *devpriv)
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(devpriv);
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);