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locking, lockdep: Convert sprintf_symbol to %pS
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / staging / comedi / drivers / usbdux.c
1 #define DRIVER_VERSION "v2.4"
2 #define DRIVER_AUTHOR "Bernd Porr, BerndPorr@f2s.com"
3 #define DRIVER_DESC "Stirling/ITL USB-DUX -- Bernd.Porr@f2s.com"
4 /*
5 comedi/drivers/usbdux.c
6 Copyright (C) 2003-2007 Bernd Porr, Bernd.Porr@f2s.com
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21
22 */
23 /*
24 Driver: usbdux
25 Description: University of Stirling USB DAQ & INCITE Technology Limited
26 Devices: [ITL] USB-DUX (usbdux.o)
27 Author: Bernd Porr <BerndPorr@f2s.com>
28 Updated: 8 Dec 2008
29 Status: Stable
30 Configuration options:
31 You have to upload firmware with the -i option. The
32 firmware is usually installed under /usr/share/usb or
33 /usr/local/share/usb or /lib/firmware.
34
35 Connection scheme for the counter at the digital port:
36 0=/CLK0, 1=UP/DOWN0, 2=RESET0, 4=/CLK1, 5=UP/DOWN1, 6=RESET1.
37 The sampling rate of the counter is approximately 500Hz.
38
39 Please note that under USB2.0 the length of the channel list determines
40 the max sampling rate. If you sample only one channel you get 8kHz
41 sampling rate. If you sample two channels you get 4kHz and so on.
42 */
43 /*
44 * I must give credit here to Chris Baugher who
45 * wrote the driver for AT-MIO-16d. I used some parts of this
46 * driver. I also must give credits to David Brownell
47 * who supported me with the USB development.
48 *
49 * Bernd Porr
50 *
51 *
52 * Revision history:
53 * 0.94: D/A output should work now with any channel list combinations
54 * 0.95: .owner commented out for kernel vers below 2.4.19
55 * sanity checks in ai/ao_cmd
56 * 0.96: trying to get it working with 2.6, moved all memory alloc to comedi's
57 * attach final USB IDs
58 * moved memory allocation completely to the corresponding comedi
59 * functions firmware upload is by fxload and no longer by comedi (due to
60 * enumeration)
61 * 0.97: USB IDs received, adjusted table
62 * 0.98: SMP, locking, memroy alloc: moved all usb memory alloc
63 * to the usb subsystem and moved all comedi related memory
64 * alloc to comedi.
65 * | kernel | registration | usbdux-usb | usbdux-comedi | comedi |
66 * 0.99: USB 2.0: changed protocol to isochronous transfer
67 * IRQ transfer is too buggy and too risky in 2.0
68 * for the high speed ISO transfer is now a working version
69 * available
70 * 0.99b: Increased the iso transfer buffer for high sp.to 10 buffers. Some VIA
71 * chipsets miss out IRQs. Deeper buffering is needed.
72 * 1.00: full USB 2.0 support for the A/D converter. Now: max 8kHz sampling
73 * rate.
74 * Firmware vers 1.00 is needed for this.
75 * Two 16 bit up/down/reset counter with a sampling rate of 1kHz
76 * And loads of cleaning up, in particular streamlining the
77 * bulk transfers.
78 * 1.1: moved EP4 transfers to EP1 to make space for a PWM output on EP4
79 * 1.2: added PWM suport via EP4
80 * 2.0: PWM seems to be stable and is not interfering with the other functions
81 * 2.1: changed PWM API
82 * 2.2: added firmware kernel request to fix an udev problem
83 * 2.3: corrected a bug in bulk timeouts which were far too short
84 * 2.4: fixed a bug which causes the driver to hang when it ran out of data.
85 * Thanks to Jan-Matthias Braun and Ian to spot the bug and fix it.
86 *
87 */
88
89 /* generates loads of debug info */
90 /* #define NOISY_DUX_DEBUGBUG */
91
92 #include <linux/kernel.h>
93 #include <linux/module.h>
94 #include <linux/init.h>
95 #include <linux/slab.h>
96 #include <linux/input.h>
97 #include <linux/usb.h>
98 #include <linux/fcntl.h>
99 #include <linux/compiler.h>
100 #include <linux/firmware.h>
101
102 #include "../comedidev.h"
103
104 #define BOARDNAME "usbdux"
105
106 /* timeout for the USB-transfer in ms*/
107 #define BULK_TIMEOUT 1000
108
109 /* constants for "firmware" upload and download */
110 #define USBDUXSUB_FIRMWARE 0xA0
111 #define VENDOR_DIR_IN 0xC0
112 #define VENDOR_DIR_OUT 0x40
113
114 /* internal addresses of the 8051 processor */
115 #define USBDUXSUB_CPUCS 0xE600
116
117 /*
118 * the minor device number, major is 180 only for debugging purposes and to
119 * upload special firmware (programming the eeprom etc) which is not compatible
120 * with the comedi framwork
121 */
122 #define USBDUXSUB_MINOR 32
123
124 /* max lenghth of the transfer-buffer for software upload */
125 #define TB_LEN 0x2000
126
127 /* Input endpoint number: ISO/IRQ */
128 #define ISOINEP 6
129
130 /* Output endpoint number: ISO/IRQ */
131 #define ISOOUTEP 2
132
133 /* This EP sends DUX commands to USBDUX */
134 #define COMMAND_OUT_EP 1
135
136 /* This EP receives the DUX commands from USBDUX */
137 #define COMMAND_IN_EP 8
138
139 /* Output endpoint for PWM */
140 #define PWM_EP 4
141
142 /* 300Hz max frequ under PWM */
143 #define MIN_PWM_PERIOD ((long)(1E9/300))
144
145 /* Default PWM frequency */
146 #define PWM_DEFAULT_PERIOD ((long)(1E9/100))
147
148 /* Number of channels */
149 #define NUMCHANNELS 8
150
151 /* Size of one A/D value */
152 #define SIZEADIN ((sizeof(int16_t)))
153
154 /*
155 * Size of the input-buffer IN BYTES
156 * Always multiple of 8 for 8 microframes which is needed in the highspeed mode
157 */
158 #define SIZEINBUF ((8*SIZEADIN))
159
160 /* 16 bytes. */
161 #define SIZEINSNBUF 16
162
163 /* Number of DA channels */
164 #define NUMOUTCHANNELS 8
165
166 /* size of one value for the D/A converter: channel and value */
167 #define SIZEDAOUT ((sizeof(int8_t)+sizeof(int16_t)))
168
169 /*
170 * Size of the output-buffer in bytes
171 * Actually only the first 4 triplets are used but for the
172 * high speed mode we need to pad it to 8 (microframes).
173 */
174 #define SIZEOUTBUF ((8*SIZEDAOUT))
175
176 /*
177 * Size of the buffer for the dux commands: just now max size is determined
178 * by the analogue out + command byte + panic bytes...
179 */
180 #define SIZEOFDUXBUFFER ((8*SIZEDAOUT+2))
181
182 /* Number of in-URBs which receive the data: min=2 */
183 #define NUMOFINBUFFERSFULL 5
184
185 /* Number of out-URBs which send the data: min=2 */
186 #define NUMOFOUTBUFFERSFULL 5
187
188 /* Number of in-URBs which receive the data: min=5 */
189 /* must have more buffers due to buggy USB ctr */
190 #define NUMOFINBUFFERSHIGH 10
191
192 /* Number of out-URBs which send the data: min=5 */
193 /* must have more buffers due to buggy USB ctr */
194 #define NUMOFOUTBUFFERSHIGH 10
195
196 /* Total number of usbdux devices */
197 #define NUMUSBDUX 16
198
199 /* Analogue in subdevice */
200 #define SUBDEV_AD 0
201
202 /* Analogue out subdevice */
203 #define SUBDEV_DA 1
204
205 /* Digital I/O */
206 #define SUBDEV_DIO 2
207
208 /* counter */
209 #define SUBDEV_COUNTER 3
210
211 /* timer aka pwm output */
212 #define SUBDEV_PWM 4
213
214 /* number of retries to get the right dux command */
215 #define RETRIES 10
216
217 /**************************************************/
218 /* comedi constants */
219 static const struct comedi_lrange range_usbdux_ai_range = { 4, {
220 BIP_RANGE
221 (4.096),
222 BIP_RANGE(4.096
223 / 2),
224 UNI_RANGE
225 (4.096),
226 UNI_RANGE(4.096
227 / 2)
228 }
229 };
230
231 static const struct comedi_lrange range_usbdux_ao_range = { 2, {
232 BIP_RANGE
233 (4.096),
234 UNI_RANGE
235 (4.096),
236 }
237 };
238
239 /*
240 * private structure of one subdevice
241 */
242
243 /*
244 * This is the structure which holds all the data of
245 * this driver one sub device just now: A/D
246 */
247 struct usbduxsub {
248 /* attached? */
249 int attached;
250 /* is it associated with a subdevice? */
251 int probed;
252 /* pointer to the usb-device */
253 struct usb_device *usbdev;
254 /* actual number of in-buffers */
255 int numOfInBuffers;
256 /* actual number of out-buffers */
257 int numOfOutBuffers;
258 /* ISO-transfer handling: buffers */
259 struct urb **urbIn;
260 struct urb **urbOut;
261 /* pwm-transfer handling */
262 struct urb *urbPwm;
263 /* PWM period */
264 unsigned int pwmPeriod;
265 /* PWM internal delay for the GPIF in the FX2 */
266 int8_t pwmDelay;
267 /* size of the PWM buffer which holds the bit pattern */
268 int sizePwmBuf;
269 /* input buffer for the ISO-transfer */
270 int16_t *inBuffer;
271 /* input buffer for single insn */
272 int16_t *insnBuffer;
273 /* output buffer for single DA outputs */
274 int16_t *outBuffer;
275 /* interface number */
276 int ifnum;
277 /* interface structure in 2.6 */
278 struct usb_interface *interface;
279 /* comedi device for the interrupt context */
280 struct comedi_device *comedidev;
281 /* is it USB_SPEED_HIGH or not? */
282 short int high_speed;
283 /* asynchronous command is running */
284 short int ai_cmd_running;
285 short int ao_cmd_running;
286 /* pwm is running */
287 short int pwm_cmd_running;
288 /* continous aquisition */
289 short int ai_continous;
290 short int ao_continous;
291 /* number of samples to acquire */
292 int ai_sample_count;
293 int ao_sample_count;
294 /* time between samples in units of the timer */
295 unsigned int ai_timer;
296 unsigned int ao_timer;
297 /* counter between aquisitions */
298 unsigned int ai_counter;
299 unsigned int ao_counter;
300 /* interval in frames/uframes */
301 unsigned int ai_interval;
302 /* D/A commands */
303 int8_t *dac_commands;
304 /* commands */
305 int8_t *dux_commands;
306 struct semaphore sem;
307 };
308
309 /*
310 * The pointer to the private usb-data of the driver is also the private data
311 * for the comedi-device. This has to be global as the usb subsystem needs
312 * global variables. The other reason is that this structure must be there
313 * _before_ any comedi command is issued. The usb subsystem must be initialised
314 * before comedi can access it.
315 */
316 static struct usbduxsub usbduxsub[NUMUSBDUX];
317
318 static DEFINE_SEMAPHORE(start_stop_sem);
319
320 /*
321 * Stops the data acquision
322 * It should be safe to call this function from any context
323 */
324 static int usbduxsub_unlink_InURBs(struct usbduxsub *usbduxsub_tmp)
325 {
326 int i = 0;
327 int err = 0;
328
329 if (usbduxsub_tmp && usbduxsub_tmp->urbIn) {
330 for (i = 0; i < usbduxsub_tmp->numOfInBuffers; i++) {
331 if (usbduxsub_tmp->urbIn[i]) {
332 /* We wait here until all transfers have been
333 * cancelled. */
334 usb_kill_urb(usbduxsub_tmp->urbIn[i]);
335 }
336 dev_dbg(&usbduxsub_tmp->interface->dev,
337 "comedi: usbdux: unlinked InURB %d, err=%d\n",
338 i, err);
339 }
340 }
341 return err;
342 }
343
344 /*
345 * This will stop a running acquisition operation
346 * Is called from within this driver from both the
347 * interrupt context and from comedi
348 */
349 static int usbdux_ai_stop(struct usbduxsub *this_usbduxsub, int do_unlink)
350 {
351 int ret = 0;
352
353 if (!this_usbduxsub) {
354 pr_err("comedi?: usbdux_ai_stop: this_usbduxsub=NULL!\n");
355 return -EFAULT;
356 }
357 dev_dbg(&this_usbduxsub->interface->dev, "comedi: usbdux_ai_stop\n");
358
359 if (do_unlink) {
360 /* stop aquistion */
361 ret = usbduxsub_unlink_InURBs(this_usbduxsub);
362 }
363
364 this_usbduxsub->ai_cmd_running = 0;
365
366 return ret;
367 }
368
369 /*
370 * This will cancel a running acquisition operation.
371 * This is called by comedi but never from inside the driver.
372 */
373 static int usbdux_ai_cancel(struct comedi_device *dev,
374 struct comedi_subdevice *s)
375 {
376 struct usbduxsub *this_usbduxsub;
377 int res = 0;
378
379 /* force unlink of all urbs */
380 this_usbduxsub = dev->private;
381 if (!this_usbduxsub)
382 return -EFAULT;
383
384 dev_dbg(&this_usbduxsub->interface->dev, "comedi: usbdux_ai_cancel\n");
385
386 /* prevent other CPUs from submitting new commands just now */
387 down(&this_usbduxsub->sem);
388 if (!(this_usbduxsub->probed)) {
389 up(&this_usbduxsub->sem);
390 return -ENODEV;
391 }
392 /* unlink only if the urb really has been submitted */
393 res = usbdux_ai_stop(this_usbduxsub, this_usbduxsub->ai_cmd_running);
394 up(&this_usbduxsub->sem);
395 return res;
396 }
397
398 /* analogue IN - interrupt service routine */
399 static void usbduxsub_ai_IsocIrq(struct urb *urb)
400 {
401 int i, err, n;
402 struct usbduxsub *this_usbduxsub;
403 struct comedi_device *this_comedidev;
404 struct comedi_subdevice *s;
405
406 /* the context variable points to the subdevice */
407 this_comedidev = urb->context;
408 /* the private structure of the subdevice is struct usbduxsub */
409 this_usbduxsub = this_comedidev->private;
410 /* subdevice which is the AD converter */
411 s = this_comedidev->subdevices + SUBDEV_AD;
412
413 /* first we test if something unusual has just happened */
414 switch (urb->status) {
415 case 0:
416 /* copy the result in the transfer buffer */
417 memcpy(this_usbduxsub->inBuffer,
418 urb->transfer_buffer, SIZEINBUF);
419 break;
420 case -EILSEQ:
421 /* error in the ISOchronous data */
422 /* we don't copy the data into the transfer buffer */
423 /* and recycle the last data byte */
424 dev_dbg(&urb->dev->dev,
425 "comedi%d: usbdux: CRC error in ISO IN stream.\n",
426 this_usbduxsub->comedidev->minor);
427
428 break;
429
430 case -ECONNRESET:
431 case -ENOENT:
432 case -ESHUTDOWN:
433 case -ECONNABORTED:
434 /* happens after an unlink command */
435 if (this_usbduxsub->ai_cmd_running) {
436 /* we are still running a command */
437 /* tell this comedi */
438 s->async->events |= COMEDI_CB_EOA;
439 s->async->events |= COMEDI_CB_ERROR;
440 comedi_event(this_usbduxsub->comedidev, s);
441 /* stop the transfer w/o unlink */
442 usbdux_ai_stop(this_usbduxsub, 0);
443 }
444 return;
445
446 default:
447 /* a real error on the bus */
448 /* pass error to comedi if we are really running a command */
449 if (this_usbduxsub->ai_cmd_running) {
450 dev_err(&urb->dev->dev,
451 "Non-zero urb status received in ai intr "
452 "context: %d\n", urb->status);
453 s->async->events |= COMEDI_CB_EOA;
454 s->async->events |= COMEDI_CB_ERROR;
455 comedi_event(this_usbduxsub->comedidev, s);
456 /* don't do an unlink here */
457 usbdux_ai_stop(this_usbduxsub, 0);
458 }
459 return;
460 }
461
462 /*
463 * at this point we are reasonably sure that nothing dodgy has happened
464 * are we running a command?
465 */
466 if (unlikely((!(this_usbduxsub->ai_cmd_running)))) {
467 /*
468 * not running a command, do not continue execution if no
469 * asynchronous command is running in particular not resubmit
470 */
471 return;
472 }
473
474 urb->dev = this_usbduxsub->usbdev;
475
476 /* resubmit the urb */
477 err = usb_submit_urb(urb, GFP_ATOMIC);
478 if (unlikely(err < 0)) {
479 dev_err(&urb->dev->dev,
480 "comedi_: urb resubmit failed in int-context! err=%d\n",
481 err);
482 if (err == -EL2NSYNC)
483 dev_err(&urb->dev->dev,
484 "buggy USB host controller or bug in IRQ "
485 "handler!\n");
486 s->async->events |= COMEDI_CB_EOA;
487 s->async->events |= COMEDI_CB_ERROR;
488 comedi_event(this_usbduxsub->comedidev, s);
489 /* don't do an unlink here */
490 usbdux_ai_stop(this_usbduxsub, 0);
491 return;
492 }
493
494 this_usbduxsub->ai_counter--;
495 if (likely(this_usbduxsub->ai_counter > 0))
496 return;
497
498 /* timer zero, transfer measurements to comedi */
499 this_usbduxsub->ai_counter = this_usbduxsub->ai_timer;
500
501 /* test, if we transmit only a fixed number of samples */
502 if (!(this_usbduxsub->ai_continous)) {
503 /* not continous, fixed number of samples */
504 this_usbduxsub->ai_sample_count--;
505 /* all samples received? */
506 if (this_usbduxsub->ai_sample_count < 0) {
507 /* prevent a resubmit next time */
508 usbdux_ai_stop(this_usbduxsub, 0);
509 /* say comedi that the acquistion is over */
510 s->async->events |= COMEDI_CB_EOA;
511 comedi_event(this_usbduxsub->comedidev, s);
512 return;
513 }
514 }
515 /* get the data from the USB bus and hand it over to comedi */
516 n = s->async->cmd.chanlist_len;
517 for (i = 0; i < n; i++) {
518 /* transfer data */
519 if (CR_RANGE(s->async->cmd.chanlist[i]) <= 1) {
520 err = comedi_buf_put
521 (s->async,
522 le16_to_cpu(this_usbduxsub->inBuffer[i]) ^ 0x800);
523 } else {
524 err = comedi_buf_put
525 (s->async,
526 le16_to_cpu(this_usbduxsub->inBuffer[i]));
527 }
528 if (unlikely(err == 0)) {
529 /* buffer overflow */
530 usbdux_ai_stop(this_usbduxsub, 0);
531 return;
532 }
533 }
534 /* tell comedi that data is there */
535 s->async->events |= COMEDI_CB_BLOCK | COMEDI_CB_EOS;
536 comedi_event(this_usbduxsub->comedidev, s);
537 }
538
539 static int usbduxsub_unlink_OutURBs(struct usbduxsub *usbduxsub_tmp)
540 {
541 int i = 0;
542 int err = 0;
543
544 if (usbduxsub_tmp && usbduxsub_tmp->urbOut) {
545 for (i = 0; i < usbduxsub_tmp->numOfOutBuffers; i++) {
546 if (usbduxsub_tmp->urbOut[i])
547 usb_kill_urb(usbduxsub_tmp->urbOut[i]);
548
549 dev_dbg(&usbduxsub_tmp->interface->dev,
550 "comedi: usbdux: unlinked OutURB %d: res=%d\n",
551 i, err);
552 }
553 }
554 return err;
555 }
556
557 /* This will cancel a running acquisition operation
558 * in any context.
559 */
560 static int usbdux_ao_stop(struct usbduxsub *this_usbduxsub, int do_unlink)
561 {
562 int ret = 0;
563
564 if (!this_usbduxsub)
565 return -EFAULT;
566 dev_dbg(&this_usbduxsub->interface->dev, "comedi: usbdux_ao_cancel\n");
567
568 if (do_unlink)
569 ret = usbduxsub_unlink_OutURBs(this_usbduxsub);
570
571 this_usbduxsub->ao_cmd_running = 0;
572
573 return ret;
574 }
575
576 /* force unlink, is called by comedi */
577 static int usbdux_ao_cancel(struct comedi_device *dev,
578 struct comedi_subdevice *s)
579 {
580 struct usbduxsub *this_usbduxsub = dev->private;
581 int res = 0;
582
583 if (!this_usbduxsub)
584 return -EFAULT;
585
586 /* prevent other CPUs from submitting a command just now */
587 down(&this_usbduxsub->sem);
588 if (!(this_usbduxsub->probed)) {
589 up(&this_usbduxsub->sem);
590 return -ENODEV;
591 }
592 /* unlink only if it is really running */
593 res = usbdux_ao_stop(this_usbduxsub, this_usbduxsub->ao_cmd_running);
594 up(&this_usbduxsub->sem);
595 return res;
596 }
597
598 static void usbduxsub_ao_IsocIrq(struct urb *urb)
599 {
600 int i, ret;
601 int8_t *datap;
602 struct usbduxsub *this_usbduxsub;
603 struct comedi_device *this_comedidev;
604 struct comedi_subdevice *s;
605
606 /* the context variable points to the subdevice */
607 this_comedidev = urb->context;
608 /* the private structure of the subdevice is struct usbduxsub */
609 this_usbduxsub = this_comedidev->private;
610
611 s = this_comedidev->subdevices + SUBDEV_DA;
612
613 switch (urb->status) {
614 case 0:
615 /* success */
616 break;
617
618 case -ECONNRESET:
619 case -ENOENT:
620 case -ESHUTDOWN:
621 case -ECONNABORTED:
622 /* after an unlink command, unplug, ... etc */
623 /* no unlink needed here. Already shutting down. */
624 if (this_usbduxsub->ao_cmd_running) {
625 s->async->events |= COMEDI_CB_EOA;
626 comedi_event(this_usbduxsub->comedidev, s);
627 usbdux_ao_stop(this_usbduxsub, 0);
628 }
629 return;
630
631 default:
632 /* a real error */
633 if (this_usbduxsub->ao_cmd_running) {
634 dev_err(&urb->dev->dev,
635 "comedi_: Non-zero urb status received in ao "
636 "intr context: %d\n", urb->status);
637 s->async->events |= COMEDI_CB_ERROR;
638 s->async->events |= COMEDI_CB_EOA;
639 comedi_event(this_usbduxsub->comedidev, s);
640 /* we do an unlink if we are in the high speed mode */
641 usbdux_ao_stop(this_usbduxsub, 0);
642 }
643 return;
644 }
645
646 /* are we actually running? */
647 if (!(this_usbduxsub->ao_cmd_running))
648 return;
649
650 /* normal operation: executing a command in this subdevice */
651 this_usbduxsub->ao_counter--;
652 if ((int)this_usbduxsub->ao_counter <= 0) {
653 /* timer zero */
654 this_usbduxsub->ao_counter = this_usbduxsub->ao_timer;
655
656 /* handle non continous aquisition */
657 if (!(this_usbduxsub->ao_continous)) {
658 /* fixed number of samples */
659 this_usbduxsub->ao_sample_count--;
660 if (this_usbduxsub->ao_sample_count < 0) {
661 /* all samples transmitted */
662 usbdux_ao_stop(this_usbduxsub, 0);
663 s->async->events |= COMEDI_CB_EOA;
664 comedi_event(this_usbduxsub->comedidev, s);
665 /* no resubmit of the urb */
666 return;
667 }
668 }
669 /* transmit data to the USB bus */
670 ((uint8_t *) (urb->transfer_buffer))[0] =
671 s->async->cmd.chanlist_len;
672 for (i = 0; i < s->async->cmd.chanlist_len; i++) {
673 short temp;
674 if (i >= NUMOUTCHANNELS)
675 break;
676
677 /* pointer to the DA */
678 datap =
679 (&(((int8_t *) urb->transfer_buffer)[i * 3 + 1]));
680 /* get the data from comedi */
681 ret = comedi_buf_get(s->async, &temp);
682 datap[0] = temp;
683 datap[1] = temp >> 8;
684 datap[2] = this_usbduxsub->dac_commands[i];
685 /* printk("data[0]=%x, data[1]=%x, data[2]=%x\n", */
686 /* datap[0],datap[1],datap[2]); */
687 if (ret < 0) {
688 dev_err(&urb->dev->dev,
689 "comedi: buffer underflow\n");
690 s->async->events |= COMEDI_CB_EOA;
691 s->async->events |= COMEDI_CB_OVERFLOW;
692 }
693 /* transmit data to comedi */
694 s->async->events |= COMEDI_CB_BLOCK;
695 comedi_event(this_usbduxsub->comedidev, s);
696 }
697 }
698 urb->transfer_buffer_length = SIZEOUTBUF;
699 urb->dev = this_usbduxsub->usbdev;
700 urb->status = 0;
701 if (this_usbduxsub->ao_cmd_running) {
702 if (this_usbduxsub->high_speed) {
703 /* uframes */
704 urb->interval = 8;
705 } else {
706 /* frames */
707 urb->interval = 1;
708 }
709 urb->number_of_packets = 1;
710 urb->iso_frame_desc[0].offset = 0;
711 urb->iso_frame_desc[0].length = SIZEOUTBUF;
712 urb->iso_frame_desc[0].status = 0;
713 ret = usb_submit_urb(urb, GFP_ATOMIC);
714 if (ret < 0) {
715 dev_err(&urb->dev->dev,
716 "comedi_: ao urb resubm failed in int-cont. "
717 "ret=%d", ret);
718 if (ret == EL2NSYNC)
719 dev_err(&urb->dev->dev,
720 "buggy USB host controller or bug in "
721 "IRQ handling!\n");
722
723 s->async->events |= COMEDI_CB_EOA;
724 s->async->events |= COMEDI_CB_ERROR;
725 comedi_event(this_usbduxsub->comedidev, s);
726 /* don't do an unlink here */
727 usbdux_ao_stop(this_usbduxsub, 0);
728 }
729 }
730 }
731
732 static int usbduxsub_start(struct usbduxsub *usbduxsub)
733 {
734 int errcode = 0;
735 uint8_t local_transfer_buffer[16];
736
737 /* 7f92 to zero */
738 local_transfer_buffer[0] = 0;
739 errcode = usb_control_msg(usbduxsub->usbdev,
740 /* create a pipe for a control transfer */
741 usb_sndctrlpipe(usbduxsub->usbdev, 0),
742 /* bRequest, "Firmware" */
743 USBDUXSUB_FIRMWARE,
744 /* bmRequestType */
745 VENDOR_DIR_OUT,
746 /* Value */
747 USBDUXSUB_CPUCS,
748 /* Index */
749 0x0000,
750 /* address of the transfer buffer */
751 local_transfer_buffer,
752 /* Length */
753 1,
754 /* Timeout */
755 BULK_TIMEOUT);
756 if (errcode < 0) {
757 dev_err(&usbduxsub->interface->dev,
758 "comedi_: control msg failed (start)\n");
759 return errcode;
760 }
761 return 0;
762 }
763
764 static int usbduxsub_stop(struct usbduxsub *usbduxsub)
765 {
766 int errcode = 0;
767
768 uint8_t local_transfer_buffer[16];
769
770 /* 7f92 to one */
771 local_transfer_buffer[0] = 1;
772 errcode = usb_control_msg(usbduxsub->usbdev,
773 usb_sndctrlpipe(usbduxsub->usbdev, 0),
774 /* bRequest, "Firmware" */
775 USBDUXSUB_FIRMWARE,
776 /* bmRequestType */
777 VENDOR_DIR_OUT,
778 /* Value */
779 USBDUXSUB_CPUCS,
780 /* Index */
781 0x0000, local_transfer_buffer,
782 /* Length */
783 1,
784 /* Timeout */
785 BULK_TIMEOUT);
786 if (errcode < 0) {
787 dev_err(&usbduxsub->interface->dev,
788 "comedi_: control msg failed (stop)\n");
789 return errcode;
790 }
791 return 0;
792 }
793
794 static int usbduxsub_upload(struct usbduxsub *usbduxsub,
795 uint8_t *local_transfer_buffer,
796 unsigned int startAddr, unsigned int len)
797 {
798 int errcode;
799
800 errcode = usb_control_msg(usbduxsub->usbdev,
801 usb_sndctrlpipe(usbduxsub->usbdev, 0),
802 /* brequest, firmware */
803 USBDUXSUB_FIRMWARE,
804 /* bmRequestType */
805 VENDOR_DIR_OUT,
806 /* value */
807 startAddr,
808 /* index */
809 0x0000,
810 /* our local safe buffer */
811 local_transfer_buffer,
812 /* length */
813 len,
814 /* timeout */
815 BULK_TIMEOUT);
816 dev_dbg(&usbduxsub->interface->dev, "comedi_: result=%d\n", errcode);
817 if (errcode < 0) {
818 dev_err(&usbduxsub->interface->dev, "comedi_: upload failed\n");
819 return errcode;
820 }
821 return 0;
822 }
823
824 #define FIRMWARE_MAX_LEN 0x2000
825
826 static int firmwareUpload(struct usbduxsub *usbduxsub,
827 const u8 *firmwareBinary, int sizeFirmware)
828 {
829 int ret;
830 uint8_t *fwBuf;
831
832 if (!firmwareBinary)
833 return 0;
834
835 if (sizeFirmware > FIRMWARE_MAX_LEN) {
836 dev_err(&usbduxsub->interface->dev,
837 "usbdux firmware binary it too large for FX2.\n");
838 return -ENOMEM;
839 }
840
841 /* we generate a local buffer for the firmware */
842 fwBuf = kmemdup(firmwareBinary, sizeFirmware, GFP_KERNEL);
843 if (!fwBuf) {
844 dev_err(&usbduxsub->interface->dev,
845 "comedi_: mem alloc for firmware failed\n");
846 return -ENOMEM;
847 }
848
849 ret = usbduxsub_stop(usbduxsub);
850 if (ret < 0) {
851 dev_err(&usbduxsub->interface->dev,
852 "comedi_: can not stop firmware\n");
853 kfree(fwBuf);
854 return ret;
855 }
856
857 ret = usbduxsub_upload(usbduxsub, fwBuf, 0, sizeFirmware);
858 if (ret < 0) {
859 dev_err(&usbduxsub->interface->dev,
860 "comedi_: firmware upload failed\n");
861 kfree(fwBuf);
862 return ret;
863 }
864 ret = usbduxsub_start(usbduxsub);
865 if (ret < 0) {
866 dev_err(&usbduxsub->interface->dev,
867 "comedi_: can not start firmware\n");
868 kfree(fwBuf);
869 return ret;
870 }
871 kfree(fwBuf);
872 return 0;
873 }
874
875 static int usbduxsub_submit_InURBs(struct usbduxsub *usbduxsub)
876 {
877 int i, errFlag;
878
879 if (!usbduxsub)
880 return -EFAULT;
881
882 /* Submit all URBs and start the transfer on the bus */
883 for (i = 0; i < usbduxsub->numOfInBuffers; i++) {
884 /* in case of a resubmission after an unlink... */
885 usbduxsub->urbIn[i]->interval = usbduxsub->ai_interval;
886 usbduxsub->urbIn[i]->context = usbduxsub->comedidev;
887 usbduxsub->urbIn[i]->dev = usbduxsub->usbdev;
888 usbduxsub->urbIn[i]->status = 0;
889 usbduxsub->urbIn[i]->transfer_flags = URB_ISO_ASAP;
890 dev_dbg(&usbduxsub->interface->dev,
891 "comedi%d: submitting in-urb[%d]: %p,%p intv=%d\n",
892 usbduxsub->comedidev->minor, i,
893 (usbduxsub->urbIn[i]->context),
894 (usbduxsub->urbIn[i]->dev),
895 (usbduxsub->urbIn[i]->interval));
896 errFlag = usb_submit_urb(usbduxsub->urbIn[i], GFP_ATOMIC);
897 if (errFlag) {
898 dev_err(&usbduxsub->interface->dev,
899 "comedi_: ai: usb_submit_urb(%d) error %d\n",
900 i, errFlag);
901 return errFlag;
902 }
903 }
904 return 0;
905 }
906
907 static int usbduxsub_submit_OutURBs(struct usbduxsub *usbduxsub)
908 {
909 int i, errFlag;
910
911 if (!usbduxsub)
912 return -EFAULT;
913
914 for (i = 0; i < usbduxsub->numOfOutBuffers; i++) {
915 dev_dbg(&usbduxsub->interface->dev,
916 "comedi_: submitting out-urb[%d]\n", i);
917 /* in case of a resubmission after an unlink... */
918 usbduxsub->urbOut[i]->context = usbduxsub->comedidev;
919 usbduxsub->urbOut[i]->dev = usbduxsub->usbdev;
920 usbduxsub->urbOut[i]->status = 0;
921 usbduxsub->urbOut[i]->transfer_flags = URB_ISO_ASAP;
922 errFlag = usb_submit_urb(usbduxsub->urbOut[i], GFP_ATOMIC);
923 if (errFlag) {
924 dev_err(&usbduxsub->interface->dev,
925 "comedi_: ao: usb_submit_urb(%d) error %d\n",
926 i, errFlag);
927 return errFlag;
928 }
929 }
930 return 0;
931 }
932
933 static int usbdux_ai_cmdtest(struct comedi_device *dev,
934 struct comedi_subdevice *s, struct comedi_cmd *cmd)
935 {
936 int err = 0, tmp, i;
937 unsigned int tmpTimer;
938 struct usbduxsub *this_usbduxsub = dev->private;
939
940 if (!(this_usbduxsub->probed))
941 return -ENODEV;
942
943 dev_dbg(&this_usbduxsub->interface->dev,
944 "comedi%d: usbdux_ai_cmdtest\n", dev->minor);
945
946 /* make sure triggers are valid */
947 /* Only immediate triggers are allowed */
948 tmp = cmd->start_src;
949 cmd->start_src &= TRIG_NOW | TRIG_INT;
950 if (!cmd->start_src || tmp != cmd->start_src)
951 err++;
952
953 /* trigger should happen timed */
954 tmp = cmd->scan_begin_src;
955 /* start a new _scan_ with a timer */
956 cmd->scan_begin_src &= TRIG_TIMER;
957 if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
958 err++;
959
960 /* scanning is continous */
961 tmp = cmd->convert_src;
962 cmd->convert_src &= TRIG_NOW;
963 if (!cmd->convert_src || tmp != cmd->convert_src)
964 err++;
965
966 /* issue a trigger when scan is finished and start a new scan */
967 tmp = cmd->scan_end_src;
968 cmd->scan_end_src &= TRIG_COUNT;
969 if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
970 err++;
971
972 /* trigger at the end of count events or not, stop condition or not */
973 tmp = cmd->stop_src;
974 cmd->stop_src &= TRIG_COUNT | TRIG_NONE;
975 if (!cmd->stop_src || tmp != cmd->stop_src)
976 err++;
977
978 if (err)
979 return 1;
980
981 /*
982 * step 2: make sure trigger sources are unique and mutually compatible
983 * note that mutual compatibility is not an issue here
984 */
985 if (cmd->scan_begin_src != TRIG_FOLLOW &&
986 cmd->scan_begin_src != TRIG_EXT &&
987 cmd->scan_begin_src != TRIG_TIMER)
988 err++;
989 if (cmd->stop_src != TRIG_COUNT && cmd->stop_src != TRIG_NONE)
990 err++;
991
992 if (err)
993 return 2;
994
995 /* step 3: make sure arguments are trivially compatible */
996 if (cmd->start_arg != 0) {
997 cmd->start_arg = 0;
998 err++;
999 }
1000
1001 if (cmd->scan_begin_src == TRIG_FOLLOW) {
1002 /* internal trigger */
1003 if (cmd->scan_begin_arg != 0) {
1004 cmd->scan_begin_arg = 0;
1005 err++;
1006 }
1007 }
1008
1009 if (cmd->scan_begin_src == TRIG_TIMER) {
1010 if (this_usbduxsub->high_speed) {
1011 /*
1012 * In high speed mode microframes are possible.
1013 * However, during one microframe we can roughly
1014 * sample one channel. Thus, the more channels
1015 * are in the channel list the more time we need.
1016 */
1017 i = 1;
1018 /* find a power of 2 for the number of channels */
1019 while (i < (cmd->chanlist_len))
1020 i = i * 2;
1021
1022 if (cmd->scan_begin_arg < (1000000 / 8 * i)) {
1023 cmd->scan_begin_arg = 1000000 / 8 * i;
1024 err++;
1025 }
1026 /* now calc the real sampling rate with all the
1027 * rounding errors */
1028 tmpTimer =
1029 ((unsigned int)(cmd->scan_begin_arg / 125000)) *
1030 125000;
1031 if (cmd->scan_begin_arg != tmpTimer) {
1032 cmd->scan_begin_arg = tmpTimer;
1033 err++;
1034 }
1035 } else {
1036 /* full speed */
1037 /* 1kHz scans every USB frame */
1038 if (cmd->scan_begin_arg < 1000000) {
1039 cmd->scan_begin_arg = 1000000;
1040 err++;
1041 }
1042 /*
1043 * calc the real sampling rate with the rounding errors
1044 */
1045 tmpTimer = ((unsigned int)(cmd->scan_begin_arg /
1046 1000000)) * 1000000;
1047 if (cmd->scan_begin_arg != tmpTimer) {
1048 cmd->scan_begin_arg = tmpTimer;
1049 err++;
1050 }
1051 }
1052 }
1053 /* the same argument */
1054 if (cmd->scan_end_arg != cmd->chanlist_len) {
1055 cmd->scan_end_arg = cmd->chanlist_len;
1056 err++;
1057 }
1058
1059 if (cmd->stop_src == TRIG_COUNT) {
1060 /* any count is allowed */
1061 } else {
1062 /* TRIG_NONE */
1063 if (cmd->stop_arg != 0) {
1064 cmd->stop_arg = 0;
1065 err++;
1066 }
1067 }
1068
1069 if (err)
1070 return 3;
1071
1072 return 0;
1073 }
1074
1075 /*
1076 * creates the ADC command for the MAX1271
1077 * range is the range value from comedi
1078 */
1079 static int8_t create_adc_command(unsigned int chan, int range)
1080 {
1081 int8_t p = (range <= 1);
1082 int8_t r = ((range % 2) == 0);
1083 return (chan << 4) | ((p == 1) << 2) | ((r == 1) << 3);
1084 }
1085
1086 /* bulk transfers to usbdux */
1087
1088 #define SENDADCOMMANDS 0
1089 #define SENDDACOMMANDS 1
1090 #define SENDDIOCONFIGCOMMAND 2
1091 #define SENDDIOBITSCOMMAND 3
1092 #define SENDSINGLEAD 4
1093 #define READCOUNTERCOMMAND 5
1094 #define WRITECOUNTERCOMMAND 6
1095 #define SENDPWMON 7
1096 #define SENDPWMOFF 8
1097
1098 static int send_dux_commands(struct usbduxsub *this_usbduxsub, int cmd_type)
1099 {
1100 int result, nsent;
1101
1102 this_usbduxsub->dux_commands[0] = cmd_type;
1103 #ifdef NOISY_DUX_DEBUGBUG
1104 printk(KERN_DEBUG "comedi%d: usbdux: dux_commands: ",
1105 this_usbduxsub->comedidev->minor);
1106 for (result = 0; result < SIZEOFDUXBUFFER; result++)
1107 printk(" %02x", this_usbduxsub->dux_commands[result]);
1108 printk("\n");
1109 #endif
1110 result = usb_bulk_msg(this_usbduxsub->usbdev,
1111 usb_sndbulkpipe(this_usbduxsub->usbdev,
1112 COMMAND_OUT_EP),
1113 this_usbduxsub->dux_commands, SIZEOFDUXBUFFER,
1114 &nsent, BULK_TIMEOUT);
1115 if (result < 0)
1116 dev_err(&this_usbduxsub->interface->dev, "comedi%d: "
1117 "could not transmit dux_command to the usb-device, "
1118 "err=%d\n", this_usbduxsub->comedidev->minor, result);
1119
1120 return result;
1121 }
1122
1123 static int receive_dux_commands(struct usbduxsub *this_usbduxsub, int command)
1124 {
1125 int result = (-EFAULT);
1126 int nrec;
1127 int i;
1128
1129 for (i = 0; i < RETRIES; i++) {
1130 result = usb_bulk_msg(this_usbduxsub->usbdev,
1131 usb_rcvbulkpipe(this_usbduxsub->usbdev,
1132 COMMAND_IN_EP),
1133 this_usbduxsub->insnBuffer, SIZEINSNBUF,
1134 &nrec, BULK_TIMEOUT);
1135 if (result < 0) {
1136 dev_err(&this_usbduxsub->interface->dev, "comedi%d: "
1137 "insn: USB error %d while receiving DUX command"
1138 "\n", this_usbduxsub->comedidev->minor, result);
1139 return result;
1140 }
1141 if (le16_to_cpu(this_usbduxsub->insnBuffer[0]) == command)
1142 return result;
1143 }
1144 /* this is only reached if the data has been requested a couple of
1145 * times */
1146 dev_err(&this_usbduxsub->interface->dev, "comedi%d: insn: "
1147 "wrong data returned from firmware: want cmd %d, got cmd %d.\n",
1148 this_usbduxsub->comedidev->minor, command,
1149 le16_to_cpu(this_usbduxsub->insnBuffer[0]));
1150 return -EFAULT;
1151 }
1152
1153 static int usbdux_ai_inttrig(struct comedi_device *dev,
1154 struct comedi_subdevice *s, unsigned int trignum)
1155 {
1156 int ret;
1157 struct usbduxsub *this_usbduxsub = dev->private;
1158 if (!this_usbduxsub)
1159 return -EFAULT;
1160
1161 down(&this_usbduxsub->sem);
1162 if (!(this_usbduxsub->probed)) {
1163 up(&this_usbduxsub->sem);
1164 return -ENODEV;
1165 }
1166 dev_dbg(&this_usbduxsub->interface->dev,
1167 "comedi%d: usbdux_ai_inttrig\n", dev->minor);
1168
1169 if (trignum != 0) {
1170 dev_err(&this_usbduxsub->interface->dev,
1171 "comedi%d: usbdux_ai_inttrig: invalid trignum\n",
1172 dev->minor);
1173 up(&this_usbduxsub->sem);
1174 return -EINVAL;
1175 }
1176 if (!(this_usbduxsub->ai_cmd_running)) {
1177 this_usbduxsub->ai_cmd_running = 1;
1178 ret = usbduxsub_submit_InURBs(this_usbduxsub);
1179 if (ret < 0) {
1180 dev_err(&this_usbduxsub->interface->dev,
1181 "comedi%d: usbdux_ai_inttrig: "
1182 "urbSubmit: err=%d\n", dev->minor, ret);
1183 this_usbduxsub->ai_cmd_running = 0;
1184 up(&this_usbduxsub->sem);
1185 return ret;
1186 }
1187 s->async->inttrig = NULL;
1188 } else {
1189 dev_err(&this_usbduxsub->interface->dev,
1190 "comedi%d: ai_inttrig but acqu is already running\n",
1191 dev->minor);
1192 }
1193 up(&this_usbduxsub->sem);
1194 return 1;
1195 }
1196
1197 static int usbdux_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
1198 {
1199 struct comedi_cmd *cmd = &s->async->cmd;
1200 unsigned int chan, range;
1201 int i, ret;
1202 struct usbduxsub *this_usbduxsub = dev->private;
1203 int result;
1204
1205 if (!this_usbduxsub)
1206 return -EFAULT;
1207
1208 dev_dbg(&this_usbduxsub->interface->dev,
1209 "comedi%d: usbdux_ai_cmd\n", dev->minor);
1210
1211 /* block other CPUs from starting an ai_cmd */
1212 down(&this_usbduxsub->sem);
1213
1214 if (!(this_usbduxsub->probed)) {
1215 up(&this_usbduxsub->sem);
1216 return -ENODEV;
1217 }
1218 if (this_usbduxsub->ai_cmd_running) {
1219 dev_err(&this_usbduxsub->interface->dev, "comedi%d: "
1220 "ai_cmd not possible. Another ai_cmd is running.\n",
1221 dev->minor);
1222 up(&this_usbduxsub->sem);
1223 return -EBUSY;
1224 }
1225 /* set current channel of the running aquisition to zero */
1226 s->async->cur_chan = 0;
1227
1228 this_usbduxsub->dux_commands[1] = cmd->chanlist_len;
1229 for (i = 0; i < cmd->chanlist_len; ++i) {
1230 chan = CR_CHAN(cmd->chanlist[i]);
1231 range = CR_RANGE(cmd->chanlist[i]);
1232 if (i >= NUMCHANNELS) {
1233 dev_err(&this_usbduxsub->interface->dev,
1234 "comedi%d: channel list too long\n",
1235 dev->minor);
1236 break;
1237 }
1238 this_usbduxsub->dux_commands[i + 2] =
1239 create_adc_command(chan, range);
1240 }
1241
1242 dev_dbg(&this_usbduxsub->interface->dev,
1243 "comedi %d: sending commands to the usb device: size=%u\n",
1244 dev->minor, NUMCHANNELS);
1245
1246 result = send_dux_commands(this_usbduxsub, SENDADCOMMANDS);
1247 if (result < 0) {
1248 up(&this_usbduxsub->sem);
1249 return result;
1250 }
1251
1252 if (this_usbduxsub->high_speed) {
1253 /*
1254 * every channel gets a time window of 125us. Thus, if we
1255 * sample all 8 channels we need 1ms. If we sample only one
1256 * channel we need only 125us
1257 */
1258 this_usbduxsub->ai_interval = 1;
1259 /* find a power of 2 for the interval */
1260 while ((this_usbduxsub->ai_interval) < (cmd->chanlist_len)) {
1261 this_usbduxsub->ai_interval =
1262 (this_usbduxsub->ai_interval) * 2;
1263 }
1264 this_usbduxsub->ai_timer = cmd->scan_begin_arg / (125000 *
1265 (this_usbduxsub->
1266 ai_interval));
1267 } else {
1268 /* interval always 1ms */
1269 this_usbduxsub->ai_interval = 1;
1270 this_usbduxsub->ai_timer = cmd->scan_begin_arg / 1000000;
1271 }
1272 if (this_usbduxsub->ai_timer < 1) {
1273 dev_err(&this_usbduxsub->interface->dev, "comedi%d: ai_cmd: "
1274 "timer=%d, scan_begin_arg=%d. "
1275 "Not properly tested by cmdtest?\n", dev->minor,
1276 this_usbduxsub->ai_timer, cmd->scan_begin_arg);
1277 up(&this_usbduxsub->sem);
1278 return -EINVAL;
1279 }
1280 this_usbduxsub->ai_counter = this_usbduxsub->ai_timer;
1281
1282 if (cmd->stop_src == TRIG_COUNT) {
1283 /* data arrives as one packet */
1284 this_usbduxsub->ai_sample_count = cmd->stop_arg;
1285 this_usbduxsub->ai_continous = 0;
1286 } else {
1287 /* continous aquisition */
1288 this_usbduxsub->ai_continous = 1;
1289 this_usbduxsub->ai_sample_count = 0;
1290 }
1291
1292 if (cmd->start_src == TRIG_NOW) {
1293 /* enable this acquisition operation */
1294 this_usbduxsub->ai_cmd_running = 1;
1295 ret = usbduxsub_submit_InURBs(this_usbduxsub);
1296 if (ret < 0) {
1297 this_usbduxsub->ai_cmd_running = 0;
1298 /* fixme: unlink here?? */
1299 up(&this_usbduxsub->sem);
1300 return ret;
1301 }
1302 s->async->inttrig = NULL;
1303 } else {
1304 /* TRIG_INT */
1305 /* don't enable the acquision operation */
1306 /* wait for an internal signal */
1307 s->async->inttrig = usbdux_ai_inttrig;
1308 }
1309 up(&this_usbduxsub->sem);
1310 return 0;
1311 }
1312
1313 /* Mode 0 is used to get a single conversion on demand */
1314 static int usbdux_ai_insn_read(struct comedi_device *dev,
1315 struct comedi_subdevice *s,
1316 struct comedi_insn *insn, unsigned int *data)
1317 {
1318 int i;
1319 unsigned int one = 0;
1320 int chan, range;
1321 int err;
1322 struct usbduxsub *this_usbduxsub = dev->private;
1323
1324 if (!this_usbduxsub)
1325 return 0;
1326
1327 dev_dbg(&this_usbduxsub->interface->dev,
1328 "comedi%d: ai_insn_read, insn->n=%d, insn->subdev=%d\n",
1329 dev->minor, insn->n, insn->subdev);
1330
1331 down(&this_usbduxsub->sem);
1332 if (!(this_usbduxsub->probed)) {
1333 up(&this_usbduxsub->sem);
1334 return -ENODEV;
1335 }
1336 if (this_usbduxsub->ai_cmd_running) {
1337 dev_err(&this_usbduxsub->interface->dev,
1338 "comedi%d: ai_insn_read not possible. "
1339 "Async Command is running.\n", dev->minor);
1340 up(&this_usbduxsub->sem);
1341 return 0;
1342 }
1343
1344 /* sample one channel */
1345 chan = CR_CHAN(insn->chanspec);
1346 range = CR_RANGE(insn->chanspec);
1347 /* set command for the first channel */
1348 this_usbduxsub->dux_commands[1] = create_adc_command(chan, range);
1349
1350 /* adc commands */
1351 err = send_dux_commands(this_usbduxsub, SENDSINGLEAD);
1352 if (err < 0) {
1353 up(&this_usbduxsub->sem);
1354 return err;
1355 }
1356
1357 for (i = 0; i < insn->n; i++) {
1358 err = receive_dux_commands(this_usbduxsub, SENDSINGLEAD);
1359 if (err < 0) {
1360 up(&this_usbduxsub->sem);
1361 return 0;
1362 }
1363 one = le16_to_cpu(this_usbduxsub->insnBuffer[1]);
1364 if (CR_RANGE(insn->chanspec) <= 1)
1365 one = one ^ 0x800;
1366
1367 data[i] = one;
1368 }
1369 up(&this_usbduxsub->sem);
1370 return i;
1371 }
1372
1373 /************************************/
1374 /* analog out */
1375
1376 static int usbdux_ao_insn_read(struct comedi_device *dev,
1377 struct comedi_subdevice *s,
1378 struct comedi_insn *insn, unsigned int *data)
1379 {
1380 int i;
1381 int chan = CR_CHAN(insn->chanspec);
1382 struct usbduxsub *this_usbduxsub = dev->private;
1383
1384 if (!this_usbduxsub)
1385 return -EFAULT;
1386
1387 down(&this_usbduxsub->sem);
1388 if (!(this_usbduxsub->probed)) {
1389 up(&this_usbduxsub->sem);
1390 return -ENODEV;
1391 }
1392 for (i = 0; i < insn->n; i++)
1393 data[i] = this_usbduxsub->outBuffer[chan];
1394
1395 up(&this_usbduxsub->sem);
1396 return i;
1397 }
1398
1399 static int usbdux_ao_insn_write(struct comedi_device *dev,
1400 struct comedi_subdevice *s,
1401 struct comedi_insn *insn, unsigned int *data)
1402 {
1403 int i, err;
1404 int chan = CR_CHAN(insn->chanspec);
1405 struct usbduxsub *this_usbduxsub = dev->private;
1406
1407 if (!this_usbduxsub)
1408 return -EFAULT;
1409
1410 dev_dbg(&this_usbduxsub->interface->dev,
1411 "comedi%d: ao_insn_write\n", dev->minor);
1412
1413 down(&this_usbduxsub->sem);
1414 if (!(this_usbduxsub->probed)) {
1415 up(&this_usbduxsub->sem);
1416 return -ENODEV;
1417 }
1418 if (this_usbduxsub->ao_cmd_running) {
1419 dev_err(&this_usbduxsub->interface->dev,
1420 "comedi%d: ao_insn_write: "
1421 "ERROR: asynchronous ao_cmd is running\n", dev->minor);
1422 up(&this_usbduxsub->sem);
1423 return 0;
1424 }
1425
1426 for (i = 0; i < insn->n; i++) {
1427 dev_dbg(&this_usbduxsub->interface->dev,
1428 "comedi%d: ao_insn_write: data[chan=%d,i=%d]=%d\n",
1429 dev->minor, chan, i, data[i]);
1430
1431 /* number of channels: 1 */
1432 this_usbduxsub->dux_commands[1] = 1;
1433 /* one 16 bit value */
1434 *((int16_t *) (this_usbduxsub->dux_commands + 2)) =
1435 cpu_to_le16(data[i]);
1436 this_usbduxsub->outBuffer[chan] = data[i];
1437 /* channel number */
1438 this_usbduxsub->dux_commands[4] = (chan << 6);
1439 err = send_dux_commands(this_usbduxsub, SENDDACOMMANDS);
1440 if (err < 0) {
1441 up(&this_usbduxsub->sem);
1442 return err;
1443 }
1444 }
1445 up(&this_usbduxsub->sem);
1446
1447 return i;
1448 }
1449
1450 static int usbdux_ao_inttrig(struct comedi_device *dev,
1451 struct comedi_subdevice *s, unsigned int trignum)
1452 {
1453 int ret;
1454 struct usbduxsub *this_usbduxsub = dev->private;
1455
1456 if (!this_usbduxsub)
1457 return -EFAULT;
1458
1459 down(&this_usbduxsub->sem);
1460 if (!(this_usbduxsub->probed)) {
1461 up(&this_usbduxsub->sem);
1462 return -ENODEV;
1463 }
1464 if (trignum != 0) {
1465 dev_err(&this_usbduxsub->interface->dev,
1466 "comedi%d: usbdux_ao_inttrig: invalid trignum\n",
1467 dev->minor);
1468 return -EINVAL;
1469 }
1470 if (!(this_usbduxsub->ao_cmd_running)) {
1471 this_usbduxsub->ao_cmd_running = 1;
1472 ret = usbduxsub_submit_OutURBs(this_usbduxsub);
1473 if (ret < 0) {
1474 dev_err(&this_usbduxsub->interface->dev,
1475 "comedi%d: usbdux_ao_inttrig: submitURB: "
1476 "err=%d\n", dev->minor, ret);
1477 this_usbduxsub->ao_cmd_running = 0;
1478 up(&this_usbduxsub->sem);
1479 return ret;
1480 }
1481 s->async->inttrig = NULL;
1482 } else {
1483 dev_err(&this_usbduxsub->interface->dev,
1484 "comedi%d: ao_inttrig but acqu is already running.\n",
1485 dev->minor);
1486 }
1487 up(&this_usbduxsub->sem);
1488 return 1;
1489 }
1490
1491 static int usbdux_ao_cmdtest(struct comedi_device *dev,
1492 struct comedi_subdevice *s, struct comedi_cmd *cmd)
1493 {
1494 int err = 0, tmp;
1495 struct usbduxsub *this_usbduxsub = dev->private;
1496
1497 if (!this_usbduxsub)
1498 return -EFAULT;
1499
1500 if (!(this_usbduxsub->probed))
1501 return -ENODEV;
1502
1503 dev_dbg(&this_usbduxsub->interface->dev,
1504 "comedi%d: usbdux_ao_cmdtest\n", dev->minor);
1505
1506 /* make sure triggers are valid */
1507 /* Only immediate triggers are allowed */
1508 tmp = cmd->start_src;
1509 cmd->start_src &= TRIG_NOW | TRIG_INT;
1510 if (!cmd->start_src || tmp != cmd->start_src)
1511 err++;
1512
1513 /* trigger should happen timed */
1514 tmp = cmd->scan_begin_src;
1515 /* just now we scan also in the high speed mode every frame */
1516 /* this is due to ehci driver limitations */
1517 if (0) { /* (this_usbduxsub->high_speed) */
1518 /* start immidiately a new scan */
1519 /* the sampling rate is set by the coversion rate */
1520 cmd->scan_begin_src &= TRIG_FOLLOW;
1521 } else {
1522 /* start a new scan (output at once) with a timer */
1523 cmd->scan_begin_src &= TRIG_TIMER;
1524 }
1525 if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
1526 err++;
1527
1528 /* scanning is continous */
1529 tmp = cmd->convert_src;
1530 /* we always output at 1kHz just now all channels at once */
1531 if (0) { /* (this_usbduxsub->high_speed) */
1532 /*
1533 * in usb-2.0 only one conversion it tranmitted but with 8kHz/n
1534 */
1535 cmd->convert_src &= TRIG_TIMER;
1536 } else {
1537 /* all conversion events happen simultaneously with a rate of
1538 * 1kHz/n */
1539 cmd->convert_src &= TRIG_NOW;
1540 }
1541 if (!cmd->convert_src || tmp != cmd->convert_src)
1542 err++;
1543
1544 /* issue a trigger when scan is finished and start a new scan */
1545 tmp = cmd->scan_end_src;
1546 cmd->scan_end_src &= TRIG_COUNT;
1547 if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
1548 err++;
1549
1550 /* trigger at the end of count events or not, stop condition or not */
1551 tmp = cmd->stop_src;
1552 cmd->stop_src &= TRIG_COUNT | TRIG_NONE;
1553 if (!cmd->stop_src || tmp != cmd->stop_src)
1554 err++;
1555
1556 if (err)
1557 return 1;
1558
1559 /*
1560 * step 2: make sure trigger sources are unique and mutually compatible
1561 * note that mutual compatibility is not an issue here
1562 */
1563 if (cmd->scan_begin_src != TRIG_FOLLOW &&
1564 cmd->scan_begin_src != TRIG_EXT &&
1565 cmd->scan_begin_src != TRIG_TIMER)
1566 err++;
1567 if (cmd->stop_src != TRIG_COUNT && cmd->stop_src != TRIG_NONE)
1568 err++;
1569
1570 if (err)
1571 return 2;
1572
1573 /* step 3: make sure arguments are trivially compatible */
1574
1575 if (cmd->start_arg != 0) {
1576 cmd->start_arg = 0;
1577 err++;
1578 }
1579
1580 if (cmd->scan_begin_src == TRIG_FOLLOW) {
1581 /* internal trigger */
1582 if (cmd->scan_begin_arg != 0) {
1583 cmd->scan_begin_arg = 0;
1584 err++;
1585 }
1586 }
1587
1588 if (cmd->scan_begin_src == TRIG_TIMER) {
1589 /* timer */
1590 if (cmd->scan_begin_arg < 1000000) {
1591 cmd->scan_begin_arg = 1000000;
1592 err++;
1593 }
1594 }
1595 /* not used now, is for later use */
1596 if (cmd->convert_src == TRIG_TIMER) {
1597 if (cmd->convert_arg < 125000) {
1598 cmd->convert_arg = 125000;
1599 err++;
1600 }
1601 }
1602
1603 /* the same argument */
1604 if (cmd->scan_end_arg != cmd->chanlist_len) {
1605 cmd->scan_end_arg = cmd->chanlist_len;
1606 err++;
1607 }
1608
1609 if (cmd->stop_src == TRIG_COUNT) {
1610 /* any count is allowed */
1611 } else {
1612 /* TRIG_NONE */
1613 if (cmd->stop_arg != 0) {
1614 cmd->stop_arg = 0;
1615 err++;
1616 }
1617 }
1618
1619 dev_dbg(&this_usbduxsub->interface->dev, "comedi%d: err=%d, "
1620 "scan_begin_src=%d, scan_begin_arg=%d, convert_src=%d, "
1621 "convert_arg=%d\n", dev->minor, err, cmd->scan_begin_src,
1622 cmd->scan_begin_arg, cmd->convert_src, cmd->convert_arg);
1623
1624 if (err)
1625 return 3;
1626
1627 return 0;
1628 }
1629
1630 static int usbdux_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
1631 {
1632 struct comedi_cmd *cmd = &s->async->cmd;
1633 unsigned int chan, gain;
1634 int i, ret;
1635 struct usbduxsub *this_usbduxsub = dev->private;
1636
1637 if (!this_usbduxsub)
1638 return -EFAULT;
1639
1640 down(&this_usbduxsub->sem);
1641 if (!(this_usbduxsub->probed)) {
1642 up(&this_usbduxsub->sem);
1643 return -ENODEV;
1644 }
1645 dev_dbg(&this_usbduxsub->interface->dev,
1646 "comedi%d: %s\n", dev->minor, __func__);
1647
1648 /* set current channel of the running aquisition to zero */
1649 s->async->cur_chan = 0;
1650 for (i = 0; i < cmd->chanlist_len; ++i) {
1651 chan = CR_CHAN(cmd->chanlist[i]);
1652 gain = CR_RANGE(cmd->chanlist[i]);
1653 if (i >= NUMOUTCHANNELS) {
1654 dev_err(&this_usbduxsub->interface->dev,
1655 "comedi%d: %s: channel list too long\n",
1656 dev->minor, __func__);
1657 break;
1658 }
1659 this_usbduxsub->dac_commands[i] = (chan << 6);
1660 dev_dbg(&this_usbduxsub->interface->dev,
1661 "comedi%d: dac command for ch %d is %x\n",
1662 dev->minor, i, this_usbduxsub->dac_commands[i]);
1663 }
1664
1665 /* we count in steps of 1ms (125us) */
1666 /* 125us mode not used yet */
1667 if (0) { /* (this_usbduxsub->high_speed) */
1668 /* 125us */
1669 /* timing of the conversion itself: every 125 us */
1670 this_usbduxsub->ao_timer = cmd->convert_arg / 125000;
1671 } else {
1672 /* 1ms */
1673 /* timing of the scan: we get all channels at once */
1674 this_usbduxsub->ao_timer = cmd->scan_begin_arg / 1000000;
1675 dev_dbg(&this_usbduxsub->interface->dev,
1676 "comedi%d: scan_begin_src=%d, scan_begin_arg=%d, "
1677 "convert_src=%d, convert_arg=%d\n", dev->minor,
1678 cmd->scan_begin_src, cmd->scan_begin_arg,
1679 cmd->convert_src, cmd->convert_arg);
1680 dev_dbg(&this_usbduxsub->interface->dev,
1681 "comedi%d: ao_timer=%d (ms)\n",
1682 dev->minor, this_usbduxsub->ao_timer);
1683 if (this_usbduxsub->ao_timer < 1) {
1684 dev_err(&this_usbduxsub->interface->dev,
1685 "comedi%d: usbdux: ao_timer=%d, "
1686 "scan_begin_arg=%d. "
1687 "Not properly tested by cmdtest?\n",
1688 dev->minor, this_usbduxsub->ao_timer,
1689 cmd->scan_begin_arg);
1690 up(&this_usbduxsub->sem);
1691 return -EINVAL;
1692 }
1693 }
1694 this_usbduxsub->ao_counter = this_usbduxsub->ao_timer;
1695
1696 if (cmd->stop_src == TRIG_COUNT) {
1697 /* not continous */
1698 /* counter */
1699 /* high speed also scans everything at once */
1700 if (0) { /* (this_usbduxsub->high_speed) */
1701 this_usbduxsub->ao_sample_count =
1702 (cmd->stop_arg) * (cmd->scan_end_arg);
1703 } else {
1704 /* there's no scan as the scan has been */
1705 /* perf inside the FX2 */
1706 /* data arrives as one packet */
1707 this_usbduxsub->ao_sample_count = cmd->stop_arg;
1708 }
1709 this_usbduxsub->ao_continous = 0;
1710 } else {
1711 /* continous aquisition */
1712 this_usbduxsub->ao_continous = 1;
1713 this_usbduxsub->ao_sample_count = 0;
1714 }
1715
1716 if (cmd->start_src == TRIG_NOW) {
1717 /* enable this acquisition operation */
1718 this_usbduxsub->ao_cmd_running = 1;
1719 ret = usbduxsub_submit_OutURBs(this_usbduxsub);
1720 if (ret < 0) {
1721 this_usbduxsub->ao_cmd_running = 0;
1722 /* fixme: unlink here?? */
1723 up(&this_usbduxsub->sem);
1724 return ret;
1725 }
1726 s->async->inttrig = NULL;
1727 } else {
1728 /* TRIG_INT */
1729 /* submit the urbs later */
1730 /* wait for an internal signal */
1731 s->async->inttrig = usbdux_ao_inttrig;
1732 }
1733
1734 up(&this_usbduxsub->sem);
1735 return 0;
1736 }
1737
1738 static int usbdux_dio_insn_config(struct comedi_device *dev,
1739 struct comedi_subdevice *s,
1740 struct comedi_insn *insn, unsigned int *data)
1741 {
1742 int chan = CR_CHAN(insn->chanspec);
1743
1744 /* The input or output configuration of each digital line is
1745 * configured by a special insn_config instruction. chanspec
1746 * contains the channel to be changed, and data[0] contains the
1747 * value COMEDI_INPUT or COMEDI_OUTPUT. */
1748
1749 switch (data[0]) {
1750 case INSN_CONFIG_DIO_OUTPUT:
1751 s->io_bits |= 1 << chan; /* 1 means Out */
1752 break;
1753 case INSN_CONFIG_DIO_INPUT:
1754 s->io_bits &= ~(1 << chan);
1755 break;
1756 case INSN_CONFIG_DIO_QUERY:
1757 data[1] =
1758 (s->io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT;
1759 break;
1760 default:
1761 return -EINVAL;
1762 break;
1763 }
1764 /* we don't tell the firmware here as it would take 8 frames */
1765 /* to submit the information. We do it in the insn_bits. */
1766 return insn->n;
1767 }
1768
1769 static int usbdux_dio_insn_bits(struct comedi_device *dev,
1770 struct comedi_subdevice *s,
1771 struct comedi_insn *insn, unsigned int *data)
1772 {
1773
1774 struct usbduxsub *this_usbduxsub = dev->private;
1775 int err;
1776
1777 if (!this_usbduxsub)
1778 return -EFAULT;
1779
1780 if (insn->n != 2)
1781 return -EINVAL;
1782
1783 down(&this_usbduxsub->sem);
1784
1785 if (!(this_usbduxsub->probed)) {
1786 up(&this_usbduxsub->sem);
1787 return -ENODEV;
1788 }
1789
1790 /* The insn data is a mask in data[0] and the new data
1791 * in data[1], each channel cooresponding to a bit. */
1792 s->state &= ~data[0];
1793 s->state |= data[0] & data[1];
1794 this_usbduxsub->dux_commands[1] = s->io_bits;
1795 this_usbduxsub->dux_commands[2] = s->state;
1796
1797 /* This command also tells the firmware to return */
1798 /* the digital input lines */
1799 err = send_dux_commands(this_usbduxsub, SENDDIOBITSCOMMAND);
1800 if (err < 0) {
1801 up(&this_usbduxsub->sem);
1802 return err;
1803 }
1804 err = receive_dux_commands(this_usbduxsub, SENDDIOBITSCOMMAND);
1805 if (err < 0) {
1806 up(&this_usbduxsub->sem);
1807 return err;
1808 }
1809
1810 data[1] = le16_to_cpu(this_usbduxsub->insnBuffer[1]);
1811 up(&this_usbduxsub->sem);
1812 return 2;
1813 }
1814
1815 /* reads the 4 counters, only two are used just now */
1816 static int usbdux_counter_read(struct comedi_device *dev,
1817 struct comedi_subdevice *s,
1818 struct comedi_insn *insn, unsigned int *data)
1819 {
1820 struct usbduxsub *this_usbduxsub = dev->private;
1821 int chan = insn->chanspec;
1822 int err;
1823
1824 if (!this_usbduxsub)
1825 return -EFAULT;
1826
1827 down(&this_usbduxsub->sem);
1828
1829 if (!(this_usbduxsub->probed)) {
1830 up(&this_usbduxsub->sem);
1831 return -ENODEV;
1832 }
1833
1834 err = send_dux_commands(this_usbduxsub, READCOUNTERCOMMAND);
1835 if (err < 0) {
1836 up(&this_usbduxsub->sem);
1837 return err;
1838 }
1839
1840 err = receive_dux_commands(this_usbduxsub, READCOUNTERCOMMAND);
1841 if (err < 0) {
1842 up(&this_usbduxsub->sem);
1843 return err;
1844 }
1845
1846 data[0] = le16_to_cpu(this_usbduxsub->insnBuffer[chan + 1]);
1847 up(&this_usbduxsub->sem);
1848 return 1;
1849 }
1850
1851 static int usbdux_counter_write(struct comedi_device *dev,
1852 struct comedi_subdevice *s,
1853 struct comedi_insn *insn, unsigned int *data)
1854 {
1855 struct usbduxsub *this_usbduxsub = dev->private;
1856 int err;
1857
1858 if (!this_usbduxsub)
1859 return -EFAULT;
1860
1861 down(&this_usbduxsub->sem);
1862
1863 if (!(this_usbduxsub->probed)) {
1864 up(&this_usbduxsub->sem);
1865 return -ENODEV;
1866 }
1867
1868 this_usbduxsub->dux_commands[1] = insn->chanspec;
1869 *((int16_t *) (this_usbduxsub->dux_commands + 2)) = cpu_to_le16(*data);
1870
1871 err = send_dux_commands(this_usbduxsub, WRITECOUNTERCOMMAND);
1872 if (err < 0) {
1873 up(&this_usbduxsub->sem);
1874 return err;
1875 }
1876
1877 up(&this_usbduxsub->sem);
1878
1879 return 1;
1880 }
1881
1882 static int usbdux_counter_config(struct comedi_device *dev,
1883 struct comedi_subdevice *s,
1884 struct comedi_insn *insn, unsigned int *data)
1885 {
1886 /* nothing to do so far */
1887 return 2;
1888 }
1889
1890 /***********************************/
1891 /* PWM */
1892
1893 static int usbduxsub_unlink_PwmURBs(struct usbduxsub *usbduxsub_tmp)
1894 {
1895 int err = 0;
1896
1897 if (usbduxsub_tmp && usbduxsub_tmp->urbPwm) {
1898 if (usbduxsub_tmp->urbPwm)
1899 usb_kill_urb(usbduxsub_tmp->urbPwm);
1900 dev_dbg(&usbduxsub_tmp->interface->dev,
1901 "comedi: unlinked PwmURB: res=%d\n", err);
1902 }
1903 return err;
1904 }
1905
1906 /* This cancels a running acquisition operation
1907 * in any context.
1908 */
1909 static int usbdux_pwm_stop(struct usbduxsub *this_usbduxsub, int do_unlink)
1910 {
1911 int ret = 0;
1912
1913 if (!this_usbduxsub)
1914 return -EFAULT;
1915
1916 dev_dbg(&this_usbduxsub->interface->dev, "comedi: %s\n", __func__);
1917 if (do_unlink)
1918 ret = usbduxsub_unlink_PwmURBs(this_usbduxsub);
1919
1920 this_usbduxsub->pwm_cmd_running = 0;
1921
1922 return ret;
1923 }
1924
1925 /* force unlink - is called by comedi */
1926 static int usbdux_pwm_cancel(struct comedi_device *dev,
1927 struct comedi_subdevice *s)
1928 {
1929 struct usbduxsub *this_usbduxsub = dev->private;
1930 int res = 0;
1931
1932 /* unlink only if it is really running */
1933 res = usbdux_pwm_stop(this_usbduxsub, this_usbduxsub->pwm_cmd_running);
1934
1935 dev_dbg(&this_usbduxsub->interface->dev,
1936 "comedi %d: sending pwm off command to the usb device.\n",
1937 dev->minor);
1938 res = send_dux_commands(this_usbduxsub, SENDPWMOFF);
1939 if (res < 0)
1940 return res;
1941
1942 return res;
1943 }
1944
1945 static void usbduxsub_pwm_irq(struct urb *urb)
1946 {
1947 int ret;
1948 struct usbduxsub *this_usbduxsub;
1949 struct comedi_device *this_comedidev;
1950 struct comedi_subdevice *s;
1951
1952 /* printk(KERN_DEBUG "PWM: IRQ\n"); */
1953
1954 /* the context variable points to the subdevice */
1955 this_comedidev = urb->context;
1956 /* the private structure of the subdevice is struct usbduxsub */
1957 this_usbduxsub = this_comedidev->private;
1958
1959 s = this_comedidev->subdevices + SUBDEV_DA;
1960
1961 switch (urb->status) {
1962 case 0:
1963 /* success */
1964 break;
1965
1966 case -ECONNRESET:
1967 case -ENOENT:
1968 case -ESHUTDOWN:
1969 case -ECONNABORTED:
1970 /*
1971 * after an unlink command, unplug, ... etc
1972 * no unlink needed here. Already shutting down.
1973 */
1974 if (this_usbduxsub->pwm_cmd_running)
1975 usbdux_pwm_stop(this_usbduxsub, 0);
1976
1977 return;
1978
1979 default:
1980 /* a real error */
1981 if (this_usbduxsub->pwm_cmd_running) {
1982 dev_err(&this_usbduxsub->interface->dev,
1983 "comedi_: Non-zero urb status received in "
1984 "pwm intr context: %d\n", urb->status);
1985 usbdux_pwm_stop(this_usbduxsub, 0);
1986 }
1987 return;
1988 }
1989
1990 /* are we actually running? */
1991 if (!(this_usbduxsub->pwm_cmd_running))
1992 return;
1993
1994 urb->transfer_buffer_length = this_usbduxsub->sizePwmBuf;
1995 urb->dev = this_usbduxsub->usbdev;
1996 urb->status = 0;
1997 if (this_usbduxsub->pwm_cmd_running) {
1998 ret = usb_submit_urb(urb, GFP_ATOMIC);
1999 if (ret < 0) {
2000 dev_err(&this_usbduxsub->interface->dev,
2001 "comedi_: pwm urb resubm failed in int-cont. "
2002 "ret=%d", ret);
2003 if (ret == EL2NSYNC)
2004 dev_err(&this_usbduxsub->interface->dev,
2005 "buggy USB host controller or bug in "
2006 "IRQ handling!\n");
2007
2008 /* don't do an unlink here */
2009 usbdux_pwm_stop(this_usbduxsub, 0);
2010 }
2011 }
2012 }
2013
2014 static int usbduxsub_submit_PwmURBs(struct usbduxsub *usbduxsub)
2015 {
2016 int errFlag;
2017
2018 if (!usbduxsub)
2019 return -EFAULT;
2020
2021 dev_dbg(&usbduxsub->interface->dev, "comedi_: submitting pwm-urb\n");
2022
2023 /* in case of a resubmission after an unlink... */
2024 usb_fill_bulk_urb(usbduxsub->urbPwm,
2025 usbduxsub->usbdev,
2026 usb_sndbulkpipe(usbduxsub->usbdev, PWM_EP),
2027 usbduxsub->urbPwm->transfer_buffer,
2028 usbduxsub->sizePwmBuf, usbduxsub_pwm_irq,
2029 usbduxsub->comedidev);
2030
2031 errFlag = usb_submit_urb(usbduxsub->urbPwm, GFP_ATOMIC);
2032 if (errFlag) {
2033 dev_err(&usbduxsub->interface->dev,
2034 "comedi_: usbdux: pwm: usb_submit_urb error %d\n",
2035 errFlag);
2036 return errFlag;
2037 }
2038 return 0;
2039 }
2040
2041 static int usbdux_pwm_period(struct comedi_device *dev,
2042 struct comedi_subdevice *s, unsigned int period)
2043 {
2044 struct usbduxsub *this_usbduxsub = dev->private;
2045 int fx2delay = 255;
2046
2047 if (period < MIN_PWM_PERIOD) {
2048 dev_err(&this_usbduxsub->interface->dev,
2049 "comedi%d: illegal period setting for pwm.\n",
2050 dev->minor);
2051 return -EAGAIN;
2052 } else {
2053 fx2delay = period / ((int)(6 * 512 * (1.0 / 0.033))) - 6;
2054 if (fx2delay > 255) {
2055 dev_err(&this_usbduxsub->interface->dev,
2056 "comedi%d: period %d for pwm is too low.\n",
2057 dev->minor, period);
2058 return -EAGAIN;
2059 }
2060 }
2061 this_usbduxsub->pwmDelay = fx2delay;
2062 this_usbduxsub->pwmPeriod = period;
2063 dev_dbg(&this_usbduxsub->interface->dev, "%s: frequ=%d, period=%d\n",
2064 __func__, period, fx2delay);
2065 return 0;
2066 }
2067
2068 /* is called from insn so there's no need to do all the sanity checks */
2069 static int usbdux_pwm_start(struct comedi_device *dev,
2070 struct comedi_subdevice *s)
2071 {
2072 int ret, i;
2073 struct usbduxsub *this_usbduxsub = dev->private;
2074
2075 dev_dbg(&this_usbduxsub->interface->dev, "comedi%d: %s\n",
2076 dev->minor, __func__);
2077
2078 if (this_usbduxsub->pwm_cmd_running) {
2079 /* already running */
2080 return 0;
2081 }
2082
2083 this_usbduxsub->dux_commands[1] = ((int8_t) this_usbduxsub->pwmDelay);
2084 ret = send_dux_commands(this_usbduxsub, SENDPWMON);
2085 if (ret < 0)
2086 return ret;
2087
2088 /* initialise the buffer */
2089 for (i = 0; i < this_usbduxsub->sizePwmBuf; i++)
2090 ((char *)(this_usbduxsub->urbPwm->transfer_buffer))[i] = 0;
2091
2092 this_usbduxsub->pwm_cmd_running = 1;
2093 ret = usbduxsub_submit_PwmURBs(this_usbduxsub);
2094 if (ret < 0) {
2095 this_usbduxsub->pwm_cmd_running = 0;
2096 return ret;
2097 }
2098 return 0;
2099 }
2100
2101 /* generates the bit pattern for PWM with the optional sign bit */
2102 static int usbdux_pwm_pattern(struct comedi_device *dev,
2103 struct comedi_subdevice *s, int channel,
2104 unsigned int value, unsigned int sign)
2105 {
2106 struct usbduxsub *this_usbduxsub = dev->private;
2107 int i, szbuf;
2108 char *pBuf;
2109 char pwm_mask;
2110 char sgn_mask;
2111 char c;
2112
2113 if (!this_usbduxsub)
2114 return -EFAULT;
2115
2116 /* this is the DIO bit which carries the PWM data */
2117 pwm_mask = (1 << channel);
2118 /* this is the DIO bit which carries the optional direction bit */
2119 sgn_mask = (16 << channel);
2120 /* this is the buffer which will be filled with the with bit */
2121 /* pattern for one period */
2122 szbuf = this_usbduxsub->sizePwmBuf;
2123 pBuf = (char *)(this_usbduxsub->urbPwm->transfer_buffer);
2124 for (i = 0; i < szbuf; i++) {
2125 c = *pBuf;
2126 /* reset bits */
2127 c = c & (~pwm_mask);
2128 /* set the bit as long as the index is lower than the value */
2129 if (i < value)
2130 c = c | pwm_mask;
2131 /* set the optional sign bit for a relay */
2132 if (!sign) {
2133 /* positive value */
2134 c = c & (~sgn_mask);
2135 } else {
2136 /* negative value */
2137 c = c | sgn_mask;
2138 }
2139 *(pBuf++) = c;
2140 }
2141 return 1;
2142 }
2143
2144 static int usbdux_pwm_write(struct comedi_device *dev,
2145 struct comedi_subdevice *s,
2146 struct comedi_insn *insn, unsigned int *data)
2147 {
2148 struct usbduxsub *this_usbduxsub = dev->private;
2149
2150 if (!this_usbduxsub)
2151 return -EFAULT;
2152
2153 if ((insn->n) != 1) {
2154 /*
2155 * doesn't make sense to have more than one value here because
2156 * it would just overwrite the PWM buffer a couple of times
2157 */
2158 return -EINVAL;
2159 }
2160
2161 /*
2162 * the sign is set via a special INSN only, this gives us 8 bits for
2163 * normal operation
2164 * relay sign 0 by default
2165 */
2166 return usbdux_pwm_pattern(dev, s, CR_CHAN(insn->chanspec), data[0], 0);
2167 }
2168
2169 static int usbdux_pwm_read(struct comedi_device *x1,
2170 struct comedi_subdevice *x2, struct comedi_insn *x3,
2171 unsigned int *x4)
2172 {
2173 /* not needed */
2174 return -EINVAL;
2175 };
2176
2177 /* switches on/off PWM */
2178 static int usbdux_pwm_config(struct comedi_device *dev,
2179 struct comedi_subdevice *s,
2180 struct comedi_insn *insn, unsigned int *data)
2181 {
2182 struct usbduxsub *this_usbduxsub = dev->private;
2183 switch (data[0]) {
2184 case INSN_CONFIG_ARM:
2185 /* switch it on */
2186 dev_dbg(&this_usbduxsub->interface->dev,
2187 "comedi%d: %s: pwm on\n", dev->minor, __func__);
2188 /*
2189 * if not zero the PWM is limited to a certain time which is
2190 * not supported here
2191 */
2192 if (data[1] != 0)
2193 return -EINVAL;
2194 return usbdux_pwm_start(dev, s);
2195 case INSN_CONFIG_DISARM:
2196 dev_dbg(&this_usbduxsub->interface->dev,
2197 "comedi%d: %s: pwm off\n", dev->minor, __func__);
2198 return usbdux_pwm_cancel(dev, s);
2199 case INSN_CONFIG_GET_PWM_STATUS:
2200 /*
2201 * to check if the USB transmission has failed or in case PWM
2202 * was limited to n cycles to check if it has terminated
2203 */
2204 data[1] = this_usbduxsub->pwm_cmd_running;
2205 return 0;
2206 case INSN_CONFIG_PWM_SET_PERIOD:
2207 dev_dbg(&this_usbduxsub->interface->dev,
2208 "comedi%d: %s: setting period\n", dev->minor, __func__);
2209 return usbdux_pwm_period(dev, s, data[1]);
2210 case INSN_CONFIG_PWM_GET_PERIOD:
2211 data[1] = this_usbduxsub->pwmPeriod;
2212 return 0;
2213 case INSN_CONFIG_PWM_SET_H_BRIDGE:
2214 /* value in the first byte and the sign in the second for a
2215 relay */
2216 return usbdux_pwm_pattern(dev, s,
2217 /* the channel number */
2218 CR_CHAN(insn->chanspec),
2219 /* actual PWM data */
2220 data[1],
2221 /* just a sign */
2222 (data[2] != 0));
2223 case INSN_CONFIG_PWM_GET_H_BRIDGE:
2224 /* values are not kept in this driver, nothing to return here */
2225 return -EINVAL;
2226 }
2227 return -EINVAL;
2228 }
2229
2230 /* end of PWM */
2231 /*****************************************************************/
2232
2233 static void tidy_up(struct usbduxsub *usbduxsub_tmp)
2234 {
2235 int i;
2236
2237 if (!usbduxsub_tmp)
2238 return;
2239 dev_dbg(&usbduxsub_tmp->interface->dev, "comedi_: tiding up\n");
2240
2241 /* shows the usb subsystem that the driver is down */
2242 if (usbduxsub_tmp->interface)
2243 usb_set_intfdata(usbduxsub_tmp->interface, NULL);
2244
2245 usbduxsub_tmp->probed = 0;
2246
2247 if (usbduxsub_tmp->urbIn) {
2248 if (usbduxsub_tmp->ai_cmd_running) {
2249 usbduxsub_tmp->ai_cmd_running = 0;
2250 usbduxsub_unlink_InURBs(usbduxsub_tmp);
2251 }
2252 for (i = 0; i < usbduxsub_tmp->numOfInBuffers; i++) {
2253 kfree(usbduxsub_tmp->urbIn[i]->transfer_buffer);
2254 usbduxsub_tmp->urbIn[i]->transfer_buffer = NULL;
2255 usb_kill_urb(usbduxsub_tmp->urbIn[i]);
2256 usb_free_urb(usbduxsub_tmp->urbIn[i]);
2257 usbduxsub_tmp->urbIn[i] = NULL;
2258 }
2259 kfree(usbduxsub_tmp->urbIn);
2260 usbduxsub_tmp->urbIn = NULL;
2261 }
2262 if (usbduxsub_tmp->urbOut) {
2263 if (usbduxsub_tmp->ao_cmd_running) {
2264 usbduxsub_tmp->ao_cmd_running = 0;
2265 usbduxsub_unlink_OutURBs(usbduxsub_tmp);
2266 }
2267 for (i = 0; i < usbduxsub_tmp->numOfOutBuffers; i++) {
2268 if (usbduxsub_tmp->urbOut[i]->transfer_buffer) {
2269 kfree(usbduxsub_tmp->
2270 urbOut[i]->transfer_buffer);
2271 usbduxsub_tmp->urbOut[i]->transfer_buffer =
2272 NULL;
2273 }
2274 if (usbduxsub_tmp->urbOut[i]) {
2275 usb_kill_urb(usbduxsub_tmp->urbOut[i]);
2276 usb_free_urb(usbduxsub_tmp->urbOut[i]);
2277 usbduxsub_tmp->urbOut[i] = NULL;
2278 }
2279 }
2280 kfree(usbduxsub_tmp->urbOut);
2281 usbduxsub_tmp->urbOut = NULL;
2282 }
2283 if (usbduxsub_tmp->urbPwm) {
2284 if (usbduxsub_tmp->pwm_cmd_running) {
2285 usbduxsub_tmp->pwm_cmd_running = 0;
2286 usbduxsub_unlink_PwmURBs(usbduxsub_tmp);
2287 }
2288 kfree(usbduxsub_tmp->urbPwm->transfer_buffer);
2289 usbduxsub_tmp->urbPwm->transfer_buffer = NULL;
2290 usb_kill_urb(usbduxsub_tmp->urbPwm);
2291 usb_free_urb(usbduxsub_tmp->urbPwm);
2292 usbduxsub_tmp->urbPwm = NULL;
2293 }
2294 kfree(usbduxsub_tmp->inBuffer);
2295 usbduxsub_tmp->inBuffer = NULL;
2296 kfree(usbduxsub_tmp->insnBuffer);
2297 usbduxsub_tmp->insnBuffer = NULL;
2298 kfree(usbduxsub_tmp->inBuffer);
2299 usbduxsub_tmp->inBuffer = NULL;
2300 kfree(usbduxsub_tmp->dac_commands);
2301 usbduxsub_tmp->dac_commands = NULL;
2302 kfree(usbduxsub_tmp->dux_commands);
2303 usbduxsub_tmp->dux_commands = NULL;
2304 usbduxsub_tmp->ai_cmd_running = 0;
2305 usbduxsub_tmp->ao_cmd_running = 0;
2306 usbduxsub_tmp->pwm_cmd_running = 0;
2307 }
2308
2309 static void usbdux_firmware_request_complete_handler(const struct firmware *fw,
2310 void *context)
2311 {
2312 struct usbduxsub *usbduxsub_tmp = context;
2313 struct usb_device *usbdev = usbduxsub_tmp->usbdev;
2314 int ret;
2315
2316 if (fw == NULL) {
2317 dev_err(&usbdev->dev,
2318 "Firmware complete handler without firmware!\n");
2319 return;
2320 }
2321
2322 /*
2323 * we need to upload the firmware here because fw will be
2324 * freed once we've left this function
2325 */
2326 ret = firmwareUpload(usbduxsub_tmp, fw->data, fw->size);
2327
2328 if (ret) {
2329 dev_err(&usbdev->dev,
2330 "Could not upload firmware (err=%d)\n", ret);
2331 goto out;
2332 }
2333 comedi_usb_auto_config(usbdev, BOARDNAME);
2334 out:
2335 release_firmware(fw);
2336 }
2337
2338 /* allocate memory for the urbs and initialise them */
2339 static int usbduxsub_probe(struct usb_interface *uinterf,
2340 const struct usb_device_id *id)
2341 {
2342 struct usb_device *udev = interface_to_usbdev(uinterf);
2343 struct device *dev = &uinterf->dev;
2344 int i;
2345 int index;
2346 int ret;
2347
2348 dev_dbg(dev, "comedi_: usbdux_: "
2349 "finding a free structure for the usb-device\n");
2350
2351 down(&start_stop_sem);
2352 /* look for a free place in the usbdux array */
2353 index = -1;
2354 for (i = 0; i < NUMUSBDUX; i++) {
2355 if (!(usbduxsub[i].probed)) {
2356 index = i;
2357 break;
2358 }
2359 }
2360
2361 /* no more space */
2362 if (index == -1) {
2363 dev_err(dev, "Too many usbdux-devices connected.\n");
2364 up(&start_stop_sem);
2365 return -EMFILE;
2366 }
2367 dev_dbg(dev, "comedi_: usbdux: "
2368 "usbduxsub[%d] is ready to connect to comedi.\n", index);
2369
2370 sema_init(&(usbduxsub[index].sem), 1);
2371 /* save a pointer to the usb device */
2372 usbduxsub[index].usbdev = udev;
2373
2374 /* 2.6: save the interface itself */
2375 usbduxsub[index].interface = uinterf;
2376 /* get the interface number from the interface */
2377 usbduxsub[index].ifnum = uinterf->altsetting->desc.bInterfaceNumber;
2378 /* hand the private data over to the usb subsystem */
2379 /* will be needed for disconnect */
2380 usb_set_intfdata(uinterf, &(usbduxsub[index]));
2381
2382 dev_dbg(dev, "comedi_: usbdux: ifnum=%d\n", usbduxsub[index].ifnum);
2383
2384 /* test if it is high speed (USB 2.0) */
2385 usbduxsub[index].high_speed =
2386 (usbduxsub[index].usbdev->speed == USB_SPEED_HIGH);
2387
2388 /* create space for the commands of the DA converter */
2389 usbduxsub[index].dac_commands = kzalloc(NUMOUTCHANNELS, GFP_KERNEL);
2390 if (!usbduxsub[index].dac_commands) {
2391 dev_err(dev, "comedi_: usbdux: "
2392 "error alloc space for dac commands\n");
2393 tidy_up(&(usbduxsub[index]));
2394 up(&start_stop_sem);
2395 return -ENOMEM;
2396 }
2397 /* create space for the commands going to the usb device */
2398 usbduxsub[index].dux_commands = kzalloc(SIZEOFDUXBUFFER, GFP_KERNEL);
2399 if (!usbduxsub[index].dux_commands) {
2400 dev_err(dev, "comedi_: usbdux: "
2401 "error alloc space for dac commands\n");
2402 tidy_up(&(usbduxsub[index]));
2403 up(&start_stop_sem);
2404 return -ENOMEM;
2405 }
2406 /* create space for the in buffer and set it to zero */
2407 usbduxsub[index].inBuffer = kzalloc(SIZEINBUF, GFP_KERNEL);
2408 if (!(usbduxsub[index].inBuffer)) {
2409 dev_err(dev, "comedi_: usbdux: "
2410 "could not alloc space for inBuffer\n");
2411 tidy_up(&(usbduxsub[index]));
2412 up(&start_stop_sem);
2413 return -ENOMEM;
2414 }
2415 /* create space of the instruction buffer */
2416 usbduxsub[index].insnBuffer = kzalloc(SIZEINSNBUF, GFP_KERNEL);
2417 if (!(usbduxsub[index].insnBuffer)) {
2418 dev_err(dev, "comedi_: usbdux: "
2419 "could not alloc space for insnBuffer\n");
2420 tidy_up(&(usbduxsub[index]));
2421 up(&start_stop_sem);
2422 return -ENOMEM;
2423 }
2424 /* create space for the outbuffer */
2425 usbduxsub[index].outBuffer = kzalloc(SIZEOUTBUF, GFP_KERNEL);
2426 if (!(usbduxsub[index].outBuffer)) {
2427 dev_err(dev, "comedi_: usbdux: "
2428 "could not alloc space for outBuffer\n");
2429 tidy_up(&(usbduxsub[index]));
2430 up(&start_stop_sem);
2431 return -ENOMEM;
2432 }
2433 /* setting to alternate setting 3: enabling iso ep and bulk ep. */
2434 i = usb_set_interface(usbduxsub[index].usbdev,
2435 usbduxsub[index].ifnum, 3);
2436 if (i < 0) {
2437 dev_err(dev, "comedi_: usbdux%d: "
2438 "could not set alternate setting 3 in high speed.\n",
2439 index);
2440 tidy_up(&(usbduxsub[index]));
2441 up(&start_stop_sem);
2442 return -ENODEV;
2443 }
2444 if (usbduxsub[index].high_speed)
2445 usbduxsub[index].numOfInBuffers = NUMOFINBUFFERSHIGH;
2446 else
2447 usbduxsub[index].numOfInBuffers = NUMOFINBUFFERSFULL;
2448
2449 usbduxsub[index].urbIn =
2450 kzalloc(sizeof(struct urb *) * usbduxsub[index].numOfInBuffers,
2451 GFP_KERNEL);
2452 if (!(usbduxsub[index].urbIn)) {
2453 dev_err(dev, "comedi_: usbdux: Could not alloc. urbIn array\n");
2454 tidy_up(&(usbduxsub[index]));
2455 up(&start_stop_sem);
2456 return -ENOMEM;
2457 }
2458 for (i = 0; i < usbduxsub[index].numOfInBuffers; i++) {
2459 /* one frame: 1ms */
2460 usbduxsub[index].urbIn[i] = usb_alloc_urb(1, GFP_KERNEL);
2461 if (usbduxsub[index].urbIn[i] == NULL) {
2462 dev_err(dev, "comedi_: usbdux%d: "
2463 "Could not alloc. urb(%d)\n", index, i);
2464 tidy_up(&(usbduxsub[index]));
2465 up(&start_stop_sem);
2466 return -ENOMEM;
2467 }
2468 usbduxsub[index].urbIn[i]->dev = usbduxsub[index].usbdev;
2469 /* will be filled later with a pointer to the comedi-device */
2470 /* and ONLY then the urb should be submitted */
2471 usbduxsub[index].urbIn[i]->context = NULL;
2472 usbduxsub[index].urbIn[i]->pipe =
2473 usb_rcvisocpipe(usbduxsub[index].usbdev, ISOINEP);
2474 usbduxsub[index].urbIn[i]->transfer_flags = URB_ISO_ASAP;
2475 usbduxsub[index].urbIn[i]->transfer_buffer =
2476 kzalloc(SIZEINBUF, GFP_KERNEL);
2477 if (!(usbduxsub[index].urbIn[i]->transfer_buffer)) {
2478 dev_err(dev, "comedi_: usbdux%d: "
2479 "could not alloc. transb.\n", index);
2480 tidy_up(&(usbduxsub[index]));
2481 up(&start_stop_sem);
2482 return -ENOMEM;
2483 }
2484 usbduxsub[index].urbIn[i]->complete = usbduxsub_ai_IsocIrq;
2485 usbduxsub[index].urbIn[i]->number_of_packets = 1;
2486 usbduxsub[index].urbIn[i]->transfer_buffer_length = SIZEINBUF;
2487 usbduxsub[index].urbIn[i]->iso_frame_desc[0].offset = 0;
2488 usbduxsub[index].urbIn[i]->iso_frame_desc[0].length = SIZEINBUF;
2489 }
2490
2491 /* out */
2492 if (usbduxsub[index].high_speed)
2493 usbduxsub[index].numOfOutBuffers = NUMOFOUTBUFFERSHIGH;
2494 else
2495 usbduxsub[index].numOfOutBuffers = NUMOFOUTBUFFERSFULL;
2496
2497 usbduxsub[index].urbOut =
2498 kzalloc(sizeof(struct urb *) * usbduxsub[index].numOfOutBuffers,
2499 GFP_KERNEL);
2500 if (!(usbduxsub[index].urbOut)) {
2501 dev_err(dev, "comedi_: usbdux: "
2502 "Could not alloc. urbOut array\n");
2503 tidy_up(&(usbduxsub[index]));
2504 up(&start_stop_sem);
2505 return -ENOMEM;
2506 }
2507 for (i = 0; i < usbduxsub[index].numOfOutBuffers; i++) {
2508 /* one frame: 1ms */
2509 usbduxsub[index].urbOut[i] = usb_alloc_urb(1, GFP_KERNEL);
2510 if (usbduxsub[index].urbOut[i] == NULL) {
2511 dev_err(dev, "comedi_: usbdux%d: "
2512 "Could not alloc. urb(%d)\n", index, i);
2513 tidy_up(&(usbduxsub[index]));
2514 up(&start_stop_sem);
2515 return -ENOMEM;
2516 }
2517 usbduxsub[index].urbOut[i]->dev = usbduxsub[index].usbdev;
2518 /* will be filled later with a pointer to the comedi-device */
2519 /* and ONLY then the urb should be submitted */
2520 usbduxsub[index].urbOut[i]->context = NULL;
2521 usbduxsub[index].urbOut[i]->pipe =
2522 usb_sndisocpipe(usbduxsub[index].usbdev, ISOOUTEP);
2523 usbduxsub[index].urbOut[i]->transfer_flags = URB_ISO_ASAP;
2524 usbduxsub[index].urbOut[i]->transfer_buffer =
2525 kzalloc(SIZEOUTBUF, GFP_KERNEL);
2526 if (!(usbduxsub[index].urbOut[i]->transfer_buffer)) {
2527 dev_err(dev, "comedi_: usbdux%d: "
2528 "could not alloc. transb.\n", index);
2529 tidy_up(&(usbduxsub[index]));
2530 up(&start_stop_sem);
2531 return -ENOMEM;
2532 }
2533 usbduxsub[index].urbOut[i]->complete = usbduxsub_ao_IsocIrq;
2534 usbduxsub[index].urbOut[i]->number_of_packets = 1;
2535 usbduxsub[index].urbOut[i]->transfer_buffer_length = SIZEOUTBUF;
2536 usbduxsub[index].urbOut[i]->iso_frame_desc[0].offset = 0;
2537 usbduxsub[index].urbOut[i]->iso_frame_desc[0].length =
2538 SIZEOUTBUF;
2539 if (usbduxsub[index].high_speed) {
2540 /* uframes */
2541 usbduxsub[index].urbOut[i]->interval = 8;
2542 } else {
2543 /* frames */
2544 usbduxsub[index].urbOut[i]->interval = 1;
2545 }
2546 }
2547
2548 /* pwm */
2549 if (usbduxsub[index].high_speed) {
2550 /* max bulk ep size in high speed */
2551 usbduxsub[index].sizePwmBuf = 512;
2552 usbduxsub[index].urbPwm = usb_alloc_urb(0, GFP_KERNEL);
2553 if (usbduxsub[index].urbPwm == NULL) {
2554 dev_err(dev, "comedi_: usbdux%d: "
2555 "Could not alloc. pwm urb\n", index);
2556 tidy_up(&(usbduxsub[index]));
2557 up(&start_stop_sem);
2558 return -ENOMEM;
2559 }
2560 usbduxsub[index].urbPwm->transfer_buffer =
2561 kzalloc(usbduxsub[index].sizePwmBuf, GFP_KERNEL);
2562 if (!(usbduxsub[index].urbPwm->transfer_buffer)) {
2563 dev_err(dev, "comedi_: usbdux%d: "
2564 "could not alloc. transb. for pwm\n", index);
2565 tidy_up(&(usbduxsub[index]));
2566 up(&start_stop_sem);
2567 return -ENOMEM;
2568 }
2569 } else {
2570 usbduxsub[index].urbPwm = NULL;
2571 usbduxsub[index].sizePwmBuf = 0;
2572 }
2573
2574 usbduxsub[index].ai_cmd_running = 0;
2575 usbduxsub[index].ao_cmd_running = 0;
2576 usbduxsub[index].pwm_cmd_running = 0;
2577
2578 /* we've reached the bottom of the function */
2579 usbduxsub[index].probed = 1;
2580 up(&start_stop_sem);
2581
2582 ret = request_firmware_nowait(THIS_MODULE,
2583 FW_ACTION_HOTPLUG,
2584 "usbdux_firmware.bin",
2585 &udev->dev,
2586 GFP_KERNEL,
2587 usbduxsub + index,
2588 usbdux_firmware_request_complete_handler);
2589
2590 if (ret) {
2591 dev_err(dev, "Could not load firmware (err=%d)\n", ret);
2592 return ret;
2593 }
2594
2595 dev_info(dev, "comedi_: usbdux%d "
2596 "has been successfully initialised.\n", index);
2597 /* success */
2598 return 0;
2599 }
2600
2601 static void usbduxsub_disconnect(struct usb_interface *intf)
2602 {
2603 struct usbduxsub *usbduxsub_tmp = usb_get_intfdata(intf);
2604 struct usb_device *udev = interface_to_usbdev(intf);
2605
2606 if (!usbduxsub_tmp) {
2607 dev_err(&intf->dev,
2608 "comedi_: disconnect called with null pointer.\n");
2609 return;
2610 }
2611 if (usbduxsub_tmp->usbdev != udev) {
2612 dev_err(&intf->dev, "comedi_: BUG! called with wrong ptr!!!\n");
2613 return;
2614 }
2615 comedi_usb_auto_unconfig(udev);
2616 down(&start_stop_sem);
2617 down(&usbduxsub_tmp->sem);
2618 tidy_up(usbduxsub_tmp);
2619 up(&usbduxsub_tmp->sem);
2620 up(&start_stop_sem);
2621 dev_dbg(&intf->dev, "comedi_: disconnected from the usb\n");
2622 }
2623
2624 /* is called when comedi-config is called */
2625 static int usbdux_attach(struct comedi_device *dev, struct comedi_devconfig *it)
2626 {
2627 int ret;
2628 int index;
2629 int i;
2630 struct usbduxsub *udev;
2631
2632 struct comedi_subdevice *s = NULL;
2633 dev->private = NULL;
2634
2635 down(&start_stop_sem);
2636 /* find a valid device which has been detected by the probe function of
2637 * the usb */
2638 index = -1;
2639 for (i = 0; i < NUMUSBDUX; i++) {
2640 if ((usbduxsub[i].probed) && (!usbduxsub[i].attached)) {
2641 index = i;
2642 break;
2643 }
2644 }
2645
2646 if (index < 0) {
2647 printk(KERN_ERR "comedi%d: usbdux: error: attach failed, no "
2648 "usbdux devs connected to the usb bus.\n", dev->minor);
2649 up(&start_stop_sem);
2650 return -ENODEV;
2651 }
2652
2653 udev = &usbduxsub[index];
2654 down(&udev->sem);
2655 /* pointer back to the corresponding comedi device */
2656 udev->comedidev = dev;
2657
2658 /* trying to upload the firmware into the chip */
2659 if (comedi_aux_data(it->options, 0) &&
2660 it->options[COMEDI_DEVCONF_AUX_DATA_LENGTH]) {
2661 firmwareUpload(udev, comedi_aux_data(it->options, 0),
2662 it->options[COMEDI_DEVCONF_AUX_DATA_LENGTH]);
2663 }
2664
2665 dev->board_name = BOARDNAME;
2666
2667 /* set number of subdevices */
2668 if (udev->high_speed) {
2669 /* with pwm */
2670 dev->n_subdevices = 5;
2671 } else {
2672 /* without pwm */
2673 dev->n_subdevices = 4;
2674 }
2675
2676 /* allocate space for the subdevices */
2677 ret = alloc_subdevices(dev, dev->n_subdevices);
2678 if (ret < 0) {
2679 dev_err(&udev->interface->dev,
2680 "comedi%d: error alloc space for subdev\n", dev->minor);
2681 up(&start_stop_sem);
2682 return ret;
2683 }
2684
2685 dev_info(&udev->interface->dev,
2686 "comedi%d: usb-device %d is attached to comedi.\n",
2687 dev->minor, index);
2688 /* private structure is also simply the usb-structure */
2689 dev->private = udev;
2690
2691 /* the first subdevice is the A/D converter */
2692 s = dev->subdevices + SUBDEV_AD;
2693 /* the URBs get the comedi subdevice */
2694 /* which is responsible for reading */
2695 /* this is the subdevice which reads data */
2696 dev->read_subdev = s;
2697 /* the subdevice receives as private structure the */
2698 /* usb-structure */
2699 s->private = NULL;
2700 /* analog input */
2701 s->type = COMEDI_SUBD_AI;
2702 /* readable and ref is to ground */
2703 s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ;
2704 /* 8 channels */
2705 s->n_chan = 8;
2706 /* length of the channellist */
2707 s->len_chanlist = 8;
2708 /* callback functions */
2709 s->insn_read = usbdux_ai_insn_read;
2710 s->do_cmdtest = usbdux_ai_cmdtest;
2711 s->do_cmd = usbdux_ai_cmd;
2712 s->cancel = usbdux_ai_cancel;
2713 /* max value from the A/D converter (12bit) */
2714 s->maxdata = 0xfff;
2715 /* range table to convert to physical units */
2716 s->range_table = (&range_usbdux_ai_range);
2717
2718 /* analog out */
2719 s = dev->subdevices + SUBDEV_DA;
2720 /* analog out */
2721 s->type = COMEDI_SUBD_AO;
2722 /* backward pointer */
2723 dev->write_subdev = s;
2724 /* the subdevice receives as private structure the */
2725 /* usb-structure */
2726 s->private = NULL;
2727 /* are writable */
2728 s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_CMD_WRITE;
2729 /* 4 channels */
2730 s->n_chan = 4;
2731 /* length of the channellist */
2732 s->len_chanlist = 4;
2733 /* 12 bit resolution */
2734 s->maxdata = 0x0fff;
2735 /* bipolar range */
2736 s->range_table = (&range_usbdux_ao_range);
2737 /* callback */
2738 s->do_cmdtest = usbdux_ao_cmdtest;
2739 s->do_cmd = usbdux_ao_cmd;
2740 s->cancel = usbdux_ao_cancel;
2741 s->insn_read = usbdux_ao_insn_read;
2742 s->insn_write = usbdux_ao_insn_write;
2743
2744 /* digital I/O */
2745 s = dev->subdevices + SUBDEV_DIO;
2746 s->type = COMEDI_SUBD_DIO;
2747 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
2748 s->n_chan = 8;
2749 s->maxdata = 1;
2750 s->range_table = (&range_digital);
2751 s->insn_bits = usbdux_dio_insn_bits;
2752 s->insn_config = usbdux_dio_insn_config;
2753 /* we don't use it */
2754 s->private = NULL;
2755
2756 /* counter */
2757 s = dev->subdevices + SUBDEV_COUNTER;
2758 s->type = COMEDI_SUBD_COUNTER;
2759 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
2760 s->n_chan = 4;
2761 s->maxdata = 0xFFFF;
2762 s->insn_read = usbdux_counter_read;
2763 s->insn_write = usbdux_counter_write;
2764 s->insn_config = usbdux_counter_config;
2765
2766 if (udev->high_speed) {
2767 /* timer / pwm */
2768 s = dev->subdevices + SUBDEV_PWM;
2769 s->type = COMEDI_SUBD_PWM;
2770 s->subdev_flags = SDF_WRITABLE | SDF_PWM_HBRIDGE;
2771 s->n_chan = 8;
2772 /* this defines the max duty cycle resolution */
2773 s->maxdata = udev->sizePwmBuf;
2774 s->insn_write = usbdux_pwm_write;
2775 s->insn_read = usbdux_pwm_read;
2776 s->insn_config = usbdux_pwm_config;
2777 usbdux_pwm_period(dev, s, PWM_DEFAULT_PERIOD);
2778 }
2779 /* finally decide that it's attached */
2780 udev->attached = 1;
2781
2782 up(&udev->sem);
2783
2784 up(&start_stop_sem);
2785
2786 dev_info(&udev->interface->dev, "comedi%d: attached to usbdux.\n",
2787 dev->minor);
2788
2789 return 0;
2790 }
2791
2792 static int usbdux_detach(struct comedi_device *dev)
2793 {
2794 struct usbduxsub *usbduxsub_tmp;
2795
2796 if (!dev) {
2797 printk(KERN_ERR
2798 "comedi?: usbdux: detach without dev variable...\n");
2799 return -EFAULT;
2800 }
2801
2802 usbduxsub_tmp = dev->private;
2803 if (!usbduxsub_tmp) {
2804 printk(KERN_ERR
2805 "comedi?: usbdux: detach without ptr to usbduxsub[]\n");
2806 return -EFAULT;
2807 }
2808
2809 dev_dbg(&usbduxsub_tmp->interface->dev, "comedi%d: detach usb device\n",
2810 dev->minor);
2811
2812 down(&usbduxsub_tmp->sem);
2813 /* Don't allow detach to free the private structure */
2814 /* It's one entry of of usbduxsub[] */
2815 dev->private = NULL;
2816 usbduxsub_tmp->attached = 0;
2817 usbduxsub_tmp->comedidev = NULL;
2818 dev_dbg(&usbduxsub_tmp->interface->dev,
2819 "comedi%d: detach: successfully removed\n", dev->minor);
2820 up(&usbduxsub_tmp->sem);
2821 return 0;
2822 }
2823
2824 /* main driver struct */
2825 static struct comedi_driver driver_usbdux = {
2826 .driver_name = "usbdux",
2827 .module = THIS_MODULE,
2828 .attach = usbdux_attach,
2829 .detach = usbdux_detach,
2830 };
2831
2832 /* Table with the USB-devices: just now only testing IDs */
2833 static const struct usb_device_id usbduxsub_table[] = {
2834 {USB_DEVICE(0x13d8, 0x0001)},
2835 {USB_DEVICE(0x13d8, 0x0002)},
2836 {} /* Terminating entry */
2837 };
2838
2839 MODULE_DEVICE_TABLE(usb, usbduxsub_table);
2840
2841 /* The usbduxsub-driver */
2842 static struct usb_driver usbduxsub_driver = {
2843 .name = BOARDNAME,
2844 .probe = usbduxsub_probe,
2845 .disconnect = usbduxsub_disconnect,
2846 .id_table = usbduxsub_table,
2847 };
2848
2849 /* Can't use the nice macro as I have also to initialise the USB */
2850 /* subsystem: */
2851 /* registering the usb-system _and_ the comedi-driver */
2852 static int __init init_usbdux(void)
2853 {
2854 printk(KERN_INFO KBUILD_MODNAME ": "
2855 DRIVER_VERSION ":" DRIVER_DESC "\n");
2856 usb_register(&usbduxsub_driver);
2857 comedi_driver_register(&driver_usbdux);
2858 return 0;
2859 }
2860
2861 /* deregistering the comedi driver and the usb-subsystem */
2862 static void __exit exit_usbdux(void)
2863 {
2864 comedi_driver_unregister(&driver_usbdux);
2865 usb_deregister(&usbduxsub_driver);
2866 }
2867
2868 module_init(init_usbdux);
2869 module_exit(exit_usbdux);
2870
2871 MODULE_AUTHOR(DRIVER_AUTHOR);
2872 MODULE_DESCRIPTION(DRIVER_DESC);
2873 MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)