1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * usbdux.c |
4 | * Copyright (C) 2003-2014 Bernd Porr, mail@berndporr.me.uk |
5 | */ |
6 | |
7 | /* |
8 | * Driver: usbdux |
9 | * Description: University of Stirling USB DAQ & INCITE Technology Limited |
10 | * Devices: [ITL] USB-DUX (usbdux) |
11 | * Author: Bernd Porr <mail@berndporr.me.uk> |
12 | * Updated: 10 Oct 2014 |
13 | * Status: Stable |
14 | * |
15 | * Connection scheme for the counter at the digital port: |
16 | * 0=/CLK0, 1=UP/DOWN0, 2=RESET0, 4=/CLK1, 5=UP/DOWN1, 6=RESET1. |
17 | * The sampling rate of the counter is approximately 500Hz. |
18 | * |
19 | * Note that under USB2.0 the length of the channel list determines |
20 | * the max sampling rate. If you sample only one channel you get 8kHz |
21 | * sampling rate. If you sample two channels you get 4kHz and so on. |
22 | */ |
23 | |
24 | /* |
25 | * I must give credit here to Chris Baugher who |
26 | * wrote the driver for AT-MIO-16d. I used some parts of this |
27 | * driver. I also must give credits to David Brownell |
28 | * who supported me with the USB development. |
29 | * |
30 | * Bernd Porr |
31 | * |
32 | * |
33 | * Revision history: |
34 | * 0.94: D/A output should work now with any channel list combinations |
35 | * 0.95: .owner commented out for kernel vers below 2.4.19 |
36 | * sanity checks in ai/ao_cmd |
37 | * 0.96: trying to get it working with 2.6, moved all memory alloc to comedi's |
38 | * attach final USB IDs |
39 | * moved memory allocation completely to the corresponding comedi |
40 | * functions firmware upload is by fxload and no longer by comedi (due to |
41 | * enumeration) |
42 | * 0.97: USB IDs received, adjusted table |
43 | * 0.98: SMP, locking, memory alloc: moved all usb memory alloc |
44 | * to the usb subsystem and moved all comedi related memory |
45 | * alloc to comedi. |
46 | * | kernel | registration | usbdux-usb | usbdux-comedi | comedi | |
47 | * 0.99: USB 2.0: changed protocol to isochronous transfer |
48 | * IRQ transfer is too buggy and too risky in 2.0 |
49 | * for the high speed ISO transfer is now a working version |
50 | * available |
51 | * 0.99b: Increased the iso transfer buffer for high sp.to 10 buffers. Some VIA |
52 | * chipsets miss out IRQs. Deeper buffering is needed. |
53 | * 1.00: full USB 2.0 support for the A/D converter. Now: max 8kHz sampling |
54 | * rate. |
55 | * Firmware vers 1.00 is needed for this. |
56 | * Two 16 bit up/down/reset counter with a sampling rate of 1kHz |
57 | * And loads of cleaning up, in particular streamlining the |
58 | * bulk transfers. |
59 | * 1.1: moved EP4 transfers to EP1 to make space for a PWM output on EP4 |
60 | * 1.2: added PWM support via EP4 |
61 | * 2.0: PWM seems to be stable and is not interfering with the other functions |
62 | * 2.1: changed PWM API |
63 | * 2.2: added firmware kernel request to fix an udev problem |
64 | * 2.3: corrected a bug in bulk timeouts which were far too short |
65 | * 2.4: fixed a bug which causes the driver to hang when it ran out of data. |
66 | * Thanks to Jan-Matthias Braun and Ian to spot the bug and fix it. |
67 | * |
68 | */ |
69 | |
70 | #include <linux/kernel.h> |
71 | #include <linux/module.h> |
72 | #include <linux/slab.h> |
73 | #include <linux/input.h> |
74 | #include <linux/fcntl.h> |
75 | #include <linux/compiler.h> |
76 | #include <linux/comedi/comedi_usb.h> |
77 | |
78 | /* constants for firmware upload and download */ |
79 | #define USBDUX_FIRMWARE "usbdux_firmware.bin" |
80 | #define USBDUX_FIRMWARE_MAX_LEN 0x2000 |
81 | #define USBDUX_FIRMWARE_CMD 0xa0 |
82 | #define VENDOR_DIR_IN 0xc0 |
83 | #define VENDOR_DIR_OUT 0x40 |
84 | #define USBDUX_CPU_CS 0xe600 |
85 | |
86 | /* usbdux bulk transfer commands */ |
87 | #define USBDUX_CMD_MULT_AI 0 |
88 | #define USBDUX_CMD_AO 1 |
89 | #define USBDUX_CMD_DIO_CFG 2 |
90 | #define USBDUX_CMD_DIO_BITS 3 |
91 | #define USBDUX_CMD_SINGLE_AI 4 |
92 | #define USBDUX_CMD_TIMER_RD 5 |
93 | #define USBDUX_CMD_TIMER_WR 6 |
94 | #define USBDUX_CMD_PWM_ON 7 |
95 | #define USBDUX_CMD_PWM_OFF 8 |
96 | |
97 | /* timeout for the USB-transfer in ms */ |
98 | #define BULK_TIMEOUT 1000 |
99 | |
100 | /* 300Hz max frequ under PWM */ |
101 | #define MIN_PWM_PERIOD ((long)(1E9 / 300)) |
102 | |
103 | /* Default PWM frequency */ |
104 | #define PWM_DEFAULT_PERIOD ((long)(1E9 / 100)) |
105 | |
106 | /* Size of one A/D value */ |
107 | #define SIZEADIN ((sizeof(u16))) |
108 | |
109 | /* |
110 | * Size of the input-buffer IN BYTES |
111 | * Always multiple of 8 for 8 microframes which is needed in the highspeed mode |
112 | */ |
113 | #define SIZEINBUF (8 * SIZEADIN) |
114 | |
115 | /* 16 bytes. */ |
116 | #define SIZEINSNBUF 16 |
117 | |
118 | /* size of one value for the D/A converter: channel and value */ |
119 | #define SIZEDAOUT ((sizeof(u8) + sizeof(u16))) |
120 | |
121 | /* |
122 | * Size of the output-buffer in bytes |
123 | * Actually only the first 4 triplets are used but for the |
124 | * high speed mode we need to pad it to 8 (microframes). |
125 | */ |
126 | #define SIZEOUTBUF (8 * SIZEDAOUT) |
127 | |
128 | /* |
129 | * Size of the buffer for the dux commands: just now max size is determined |
130 | * by the analogue out + command byte + panic bytes... |
131 | */ |
132 | #define SIZEOFDUXBUFFER (8 * SIZEDAOUT + 2) |
133 | |
134 | /* Number of in-URBs which receive the data: min=2 */ |
135 | #define NUMOFINBUFFERSFULL 5 |
136 | |
137 | /* Number of out-URBs which send the data: min=2 */ |
138 | #define NUMOFOUTBUFFERSFULL 5 |
139 | |
140 | /* Number of in-URBs which receive the data: min=5 */ |
141 | /* must have more buffers due to buggy USB ctr */ |
142 | #define NUMOFINBUFFERSHIGH 10 |
143 | |
144 | /* Number of out-URBs which send the data: min=5 */ |
145 | /* must have more buffers due to buggy USB ctr */ |
146 | #define NUMOFOUTBUFFERSHIGH 10 |
147 | |
148 | /* number of retries to get the right dux command */ |
149 | #define RETRIES 10 |
150 | |
151 | static const struct comedi_lrange range_usbdux_ai_range = { |
152 | 4, { |
153 | BIP_RANGE(4.096), |
154 | BIP_RANGE(4.096 / 2), |
155 | UNI_RANGE(4.096), |
156 | UNI_RANGE(4.096 / 2) |
157 | } |
158 | }; |
159 | |
160 | static const struct comedi_lrange range_usbdux_ao_range = { |
161 | 2, { |
162 | BIP_RANGE(4.096), |
163 | UNI_RANGE(4.096) |
164 | } |
165 | }; |
166 | |
167 | struct usbdux_private { |
168 | /* actual number of in-buffers */ |
169 | int n_ai_urbs; |
170 | /* actual number of out-buffers */ |
171 | int n_ao_urbs; |
172 | /* ISO-transfer handling: buffers */ |
173 | struct urb **ai_urbs; |
174 | struct urb **ao_urbs; |
175 | /* pwm-transfer handling */ |
176 | struct urb *pwm_urb; |
177 | /* PWM period */ |
178 | unsigned int pwm_period; |
179 | /* PWM internal delay for the GPIF in the FX2 */ |
180 | u8 pwm_delay; |
181 | /* size of the PWM buffer which holds the bit pattern */ |
182 | int pwm_buf_sz; |
183 | /* input buffer for the ISO-transfer */ |
184 | __le16 *in_buf; |
185 | /* input buffer for single insn */ |
186 | __le16 *insn_buf; |
187 | |
188 | unsigned int high_speed:1; |
189 | unsigned int ai_cmd_running:1; |
190 | unsigned int ao_cmd_running:1; |
191 | unsigned int pwm_cmd_running:1; |
192 | |
193 | /* time between samples in units of the timer */ |
194 | unsigned int ai_timer; |
195 | unsigned int ao_timer; |
196 | /* counter between aquisitions */ |
197 | unsigned int ai_counter; |
198 | unsigned int ao_counter; |
199 | /* interval in frames/uframes */ |
200 | unsigned int ai_interval; |
201 | /* commands */ |
202 | u8 *dux_commands; |
203 | struct mutex mut; |
204 | }; |
205 | |
206 | static void usbdux_unlink_urbs(struct urb **urbs, int num_urbs) |
207 | { |
208 | int i; |
209 | |
210 | for (i = 0; i < num_urbs; i++) |
211 | usb_kill_urb(urb: urbs[i]); |
212 | } |
213 | |
214 | static void usbdux_ai_stop(struct comedi_device *dev, int do_unlink) |
215 | { |
216 | struct usbdux_private *devpriv = dev->private; |
217 | |
218 | if (do_unlink && devpriv->ai_urbs) |
219 | usbdux_unlink_urbs(urbs: devpriv->ai_urbs, num_urbs: devpriv->n_ai_urbs); |
220 | |
221 | devpriv->ai_cmd_running = 0; |
222 | } |
223 | |
224 | static int usbdux_ai_cancel(struct comedi_device *dev, |
225 | struct comedi_subdevice *s) |
226 | { |
227 | struct usbdux_private *devpriv = dev->private; |
228 | |
229 | /* prevent other CPUs from submitting new commands just now */ |
230 | mutex_lock(&devpriv->mut); |
231 | /* unlink only if the urb really has been submitted */ |
232 | usbdux_ai_stop(dev, do_unlink: devpriv->ai_cmd_running); |
233 | mutex_unlock(lock: &devpriv->mut); |
234 | |
235 | return 0; |
236 | } |
237 | |
238 | static void usbduxsub_ai_handle_urb(struct comedi_device *dev, |
239 | struct comedi_subdevice *s, |
240 | struct urb *urb) |
241 | { |
242 | struct usbdux_private *devpriv = dev->private; |
243 | struct comedi_async *async = s->async; |
244 | struct comedi_cmd *cmd = &async->cmd; |
245 | int ret; |
246 | int i; |
247 | |
248 | devpriv->ai_counter--; |
249 | if (devpriv->ai_counter == 0) { |
250 | devpriv->ai_counter = devpriv->ai_timer; |
251 | |
252 | /* get the data from the USB bus and hand it over to comedi */ |
253 | for (i = 0; i < cmd->chanlist_len; i++) { |
254 | unsigned int range = CR_RANGE(cmd->chanlist[i]); |
255 | u16 val = le16_to_cpu(devpriv->in_buf[i]); |
256 | |
257 | /* bipolar data is two's-complement */ |
258 | if (comedi_range_is_bipolar(s, range)) |
259 | val = comedi_offset_munge(s, val); |
260 | |
261 | /* transfer data */ |
262 | if (!comedi_buf_write_samples(s, data: &val, nsamples: 1)) |
263 | return; |
264 | } |
265 | |
266 | if (cmd->stop_src == TRIG_COUNT && |
267 | async->scans_done >= cmd->stop_arg) |
268 | async->events |= COMEDI_CB_EOA; |
269 | } |
270 | |
271 | /* if command is still running, resubmit urb */ |
272 | if (!(async->events & COMEDI_CB_CANCEL_MASK)) { |
273 | urb->dev = comedi_to_usb_dev(dev); |
274 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
275 | if (ret < 0) { |
276 | dev_err(dev->class_dev, |
277 | "urb resubmit failed in int-context! err=%d\n" , |
278 | ret); |
279 | if (ret == -EL2NSYNC) |
280 | dev_err(dev->class_dev, |
281 | "buggy USB host controller or bug in IRQ handler!\n" ); |
282 | async->events |= COMEDI_CB_ERROR; |
283 | } |
284 | } |
285 | } |
286 | |
287 | static void usbduxsub_ai_isoc_irq(struct urb *urb) |
288 | { |
289 | struct comedi_device *dev = urb->context; |
290 | struct comedi_subdevice *s = dev->read_subdev; |
291 | struct comedi_async *async = s->async; |
292 | struct usbdux_private *devpriv = dev->private; |
293 | |
294 | /* exit if not running a command, do not resubmit urb */ |
295 | if (!devpriv->ai_cmd_running) |
296 | return; |
297 | |
298 | switch (urb->status) { |
299 | case 0: |
300 | /* copy the result in the transfer buffer */ |
301 | memcpy(devpriv->in_buf, urb->transfer_buffer, SIZEINBUF); |
302 | usbduxsub_ai_handle_urb(dev, s, urb); |
303 | break; |
304 | |
305 | case -EILSEQ: |
306 | /* |
307 | * error in the ISOchronous data |
308 | * we don't copy the data into the transfer buffer |
309 | * and recycle the last data byte |
310 | */ |
311 | dev_dbg(dev->class_dev, "CRC error in ISO IN stream\n" ); |
312 | usbduxsub_ai_handle_urb(dev, s, urb); |
313 | break; |
314 | |
315 | case -ECONNRESET: |
316 | case -ENOENT: |
317 | case -ESHUTDOWN: |
318 | case -ECONNABORTED: |
319 | /* after an unlink command, unplug, ... etc */ |
320 | async->events |= COMEDI_CB_ERROR; |
321 | break; |
322 | |
323 | default: |
324 | /* a real error */ |
325 | dev_err(dev->class_dev, |
326 | "Non-zero urb status received in ai intr context: %d\n" , |
327 | urb->status); |
328 | async->events |= COMEDI_CB_ERROR; |
329 | break; |
330 | } |
331 | |
332 | /* |
333 | * comedi_handle_events() cannot be used in this driver. The (*cancel) |
334 | * operation would unlink the urb. |
335 | */ |
336 | if (async->events & COMEDI_CB_CANCEL_MASK) |
337 | usbdux_ai_stop(dev, do_unlink: 0); |
338 | |
339 | comedi_event(dev, s); |
340 | } |
341 | |
342 | static void usbdux_ao_stop(struct comedi_device *dev, int do_unlink) |
343 | { |
344 | struct usbdux_private *devpriv = dev->private; |
345 | |
346 | if (do_unlink && devpriv->ao_urbs) |
347 | usbdux_unlink_urbs(urbs: devpriv->ao_urbs, num_urbs: devpriv->n_ao_urbs); |
348 | |
349 | devpriv->ao_cmd_running = 0; |
350 | } |
351 | |
352 | static int usbdux_ao_cancel(struct comedi_device *dev, |
353 | struct comedi_subdevice *s) |
354 | { |
355 | struct usbdux_private *devpriv = dev->private; |
356 | |
357 | /* prevent other CPUs from submitting a command just now */ |
358 | mutex_lock(&devpriv->mut); |
359 | /* unlink only if it is really running */ |
360 | usbdux_ao_stop(dev, do_unlink: devpriv->ao_cmd_running); |
361 | mutex_unlock(lock: &devpriv->mut); |
362 | |
363 | return 0; |
364 | } |
365 | |
366 | static void usbduxsub_ao_handle_urb(struct comedi_device *dev, |
367 | struct comedi_subdevice *s, |
368 | struct urb *urb) |
369 | { |
370 | struct usbdux_private *devpriv = dev->private; |
371 | struct comedi_async *async = s->async; |
372 | struct comedi_cmd *cmd = &async->cmd; |
373 | u8 *datap; |
374 | int ret; |
375 | int i; |
376 | |
377 | devpriv->ao_counter--; |
378 | if (devpriv->ao_counter == 0) { |
379 | devpriv->ao_counter = devpriv->ao_timer; |
380 | |
381 | if (cmd->stop_src == TRIG_COUNT && |
382 | async->scans_done >= cmd->stop_arg) { |
383 | async->events |= COMEDI_CB_EOA; |
384 | return; |
385 | } |
386 | |
387 | /* transmit data to the USB bus */ |
388 | datap = urb->transfer_buffer; |
389 | *datap++ = cmd->chanlist_len; |
390 | for (i = 0; i < cmd->chanlist_len; i++) { |
391 | unsigned int chan = CR_CHAN(cmd->chanlist[i]); |
392 | unsigned short val; |
393 | |
394 | if (!comedi_buf_read_samples(s, data: &val, nsamples: 1)) { |
395 | dev_err(dev->class_dev, "buffer underflow\n" ); |
396 | async->events |= COMEDI_CB_OVERFLOW; |
397 | return; |
398 | } |
399 | |
400 | /* pointer to the DA */ |
401 | *datap++ = val & 0xff; |
402 | *datap++ = (val >> 8) & 0xff; |
403 | *datap++ = chan << 6; |
404 | s->readback[chan] = val; |
405 | } |
406 | } |
407 | |
408 | /* if command is still running, resubmit urb for BULK transfer */ |
409 | if (!(async->events & COMEDI_CB_CANCEL_MASK)) { |
410 | urb->transfer_buffer_length = SIZEOUTBUF; |
411 | urb->dev = comedi_to_usb_dev(dev); |
412 | urb->status = 0; |
413 | if (devpriv->high_speed) |
414 | urb->interval = 8; /* uframes */ |
415 | else |
416 | urb->interval = 1; /* frames */ |
417 | urb->number_of_packets = 1; |
418 | urb->iso_frame_desc[0].offset = 0; |
419 | urb->iso_frame_desc[0].length = SIZEOUTBUF; |
420 | urb->iso_frame_desc[0].status = 0; |
421 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
422 | if (ret < 0) { |
423 | dev_err(dev->class_dev, |
424 | "ao urb resubm failed in int-cont. ret=%d" , |
425 | ret); |
426 | if (ret == -EL2NSYNC) |
427 | dev_err(dev->class_dev, |
428 | "buggy USB host controller or bug in IRQ handling!\n" ); |
429 | async->events |= COMEDI_CB_ERROR; |
430 | } |
431 | } |
432 | } |
433 | |
434 | static void usbduxsub_ao_isoc_irq(struct urb *urb) |
435 | { |
436 | struct comedi_device *dev = urb->context; |
437 | struct comedi_subdevice *s = dev->write_subdev; |
438 | struct comedi_async *async = s->async; |
439 | struct usbdux_private *devpriv = dev->private; |
440 | |
441 | /* exit if not running a command, do not resubmit urb */ |
442 | if (!devpriv->ao_cmd_running) |
443 | return; |
444 | |
445 | switch (urb->status) { |
446 | case 0: |
447 | usbduxsub_ao_handle_urb(dev, s, urb); |
448 | break; |
449 | |
450 | case -ECONNRESET: |
451 | case -ENOENT: |
452 | case -ESHUTDOWN: |
453 | case -ECONNABORTED: |
454 | /* after an unlink command, unplug, ... etc */ |
455 | async->events |= COMEDI_CB_ERROR; |
456 | break; |
457 | |
458 | default: |
459 | /* a real error */ |
460 | dev_err(dev->class_dev, |
461 | "Non-zero urb status received in ao intr context: %d\n" , |
462 | urb->status); |
463 | async->events |= COMEDI_CB_ERROR; |
464 | break; |
465 | } |
466 | |
467 | /* |
468 | * comedi_handle_events() cannot be used in this driver. The (*cancel) |
469 | * operation would unlink the urb. |
470 | */ |
471 | if (async->events & COMEDI_CB_CANCEL_MASK) |
472 | usbdux_ao_stop(dev, do_unlink: 0); |
473 | |
474 | comedi_event(dev, s); |
475 | } |
476 | |
477 | static int usbdux_submit_urbs(struct comedi_device *dev, |
478 | struct urb **urbs, int num_urbs, |
479 | int input_urb) |
480 | { |
481 | struct usb_device *usb = comedi_to_usb_dev(dev); |
482 | struct usbdux_private *devpriv = dev->private; |
483 | struct urb *urb; |
484 | int ret; |
485 | int i; |
486 | |
487 | /* Submit all URBs and start the transfer on the bus */ |
488 | for (i = 0; i < num_urbs; i++) { |
489 | urb = urbs[i]; |
490 | |
491 | /* in case of a resubmission after an unlink... */ |
492 | if (input_urb) |
493 | urb->interval = devpriv->ai_interval; |
494 | urb->context = dev; |
495 | urb->dev = usb; |
496 | urb->status = 0; |
497 | urb->transfer_flags = URB_ISO_ASAP; |
498 | |
499 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
500 | if (ret) |
501 | return ret; |
502 | } |
503 | return 0; |
504 | } |
505 | |
506 | static int usbdux_ai_cmdtest(struct comedi_device *dev, |
507 | struct comedi_subdevice *s, struct comedi_cmd *cmd) |
508 | { |
509 | struct usbdux_private *devpriv = dev->private; |
510 | int err = 0; |
511 | |
512 | /* Step 1 : check if triggers are trivially valid */ |
513 | |
514 | err |= comedi_check_trigger_src(src: &cmd->start_src, TRIG_NOW | TRIG_INT); |
515 | err |= comedi_check_trigger_src(src: &cmd->scan_begin_src, TRIG_TIMER); |
516 | err |= comedi_check_trigger_src(src: &cmd->convert_src, TRIG_NOW); |
517 | err |= comedi_check_trigger_src(src: &cmd->scan_end_src, TRIG_COUNT); |
518 | err |= comedi_check_trigger_src(src: &cmd->stop_src, TRIG_COUNT | TRIG_NONE); |
519 | |
520 | if (err) |
521 | return 1; |
522 | |
523 | /* Step 2a : make sure trigger sources are unique */ |
524 | |
525 | err |= comedi_check_trigger_is_unique(src: cmd->start_src); |
526 | err |= comedi_check_trigger_is_unique(src: cmd->stop_src); |
527 | |
528 | /* Step 2b : and mutually compatible */ |
529 | |
530 | if (err) |
531 | return 2; |
532 | |
533 | /* Step 3: check if arguments are trivially valid */ |
534 | |
535 | err |= comedi_check_trigger_arg_is(arg: &cmd->start_arg, val: 0); |
536 | |
537 | if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */ |
538 | err |= comedi_check_trigger_arg_is(arg: &cmd->scan_begin_arg, val: 0); |
539 | |
540 | if (cmd->scan_begin_src == TRIG_TIMER) { |
541 | /* full speed does 1kHz scans every USB frame */ |
542 | unsigned int arg = 1000000; |
543 | unsigned int min_arg = arg; |
544 | |
545 | if (devpriv->high_speed) { |
546 | /* |
547 | * In high speed mode microframes are possible. |
548 | * However, during one microframe we can roughly |
549 | * sample one channel. Thus, the more channels |
550 | * are in the channel list the more time we need. |
551 | */ |
552 | int i = 1; |
553 | |
554 | /* find a power of 2 for the number of channels */ |
555 | while (i < cmd->chanlist_len) |
556 | i = i * 2; |
557 | |
558 | arg /= 8; |
559 | min_arg = arg * i; |
560 | } |
561 | err |= comedi_check_trigger_arg_min(arg: &cmd->scan_begin_arg, |
562 | val: min_arg); |
563 | /* calc the real sampling rate with the rounding errors */ |
564 | arg = (cmd->scan_begin_arg / arg) * arg; |
565 | err |= comedi_check_trigger_arg_is(arg: &cmd->scan_begin_arg, val: arg); |
566 | } |
567 | |
568 | err |= comedi_check_trigger_arg_is(arg: &cmd->scan_end_arg, |
569 | val: cmd->chanlist_len); |
570 | |
571 | if (cmd->stop_src == TRIG_COUNT) |
572 | err |= comedi_check_trigger_arg_min(arg: &cmd->stop_arg, val: 1); |
573 | else /* TRIG_NONE */ |
574 | err |= comedi_check_trigger_arg_is(arg: &cmd->stop_arg, val: 0); |
575 | |
576 | if (err) |
577 | return 3; |
578 | |
579 | return 0; |
580 | } |
581 | |
582 | /* |
583 | * creates the ADC command for the MAX1271 |
584 | * range is the range value from comedi |
585 | */ |
586 | static u8 create_adc_command(unsigned int chan, unsigned int range) |
587 | { |
588 | u8 p = (range <= 1); |
589 | u8 r = ((range % 2) == 0); |
590 | |
591 | return (chan << 4) | ((p == 1) << 2) | ((r == 1) << 3); |
592 | } |
593 | |
594 | static int send_dux_commands(struct comedi_device *dev, unsigned int cmd_type) |
595 | { |
596 | struct usb_device *usb = comedi_to_usb_dev(dev); |
597 | struct usbdux_private *devpriv = dev->private; |
598 | int nsent; |
599 | |
600 | devpriv->dux_commands[0] = cmd_type; |
601 | |
602 | return usb_bulk_msg(usb_dev: usb, usb_sndbulkpipe(usb, 1), |
603 | data: devpriv->dux_commands, SIZEOFDUXBUFFER, |
604 | actual_length: &nsent, BULK_TIMEOUT); |
605 | } |
606 | |
607 | static int receive_dux_commands(struct comedi_device *dev, unsigned int command) |
608 | { |
609 | struct usb_device *usb = comedi_to_usb_dev(dev); |
610 | struct usbdux_private *devpriv = dev->private; |
611 | int ret; |
612 | int nrec; |
613 | int i; |
614 | |
615 | for (i = 0; i < RETRIES; i++) { |
616 | ret = usb_bulk_msg(usb_dev: usb, usb_rcvbulkpipe(usb, 8), |
617 | data: devpriv->insn_buf, SIZEINSNBUF, |
618 | actual_length: &nrec, BULK_TIMEOUT); |
619 | if (ret < 0) |
620 | return ret; |
621 | if (le16_to_cpu(devpriv->insn_buf[0]) == command) |
622 | return ret; |
623 | } |
624 | /* command not received */ |
625 | return -EFAULT; |
626 | } |
627 | |
628 | static int usbdux_ai_inttrig(struct comedi_device *dev, |
629 | struct comedi_subdevice *s, |
630 | unsigned int trig_num) |
631 | { |
632 | struct usbdux_private *devpriv = dev->private; |
633 | struct comedi_cmd *cmd = &s->async->cmd; |
634 | int ret; |
635 | |
636 | if (trig_num != cmd->start_arg) |
637 | return -EINVAL; |
638 | |
639 | mutex_lock(&devpriv->mut); |
640 | |
641 | if (!devpriv->ai_cmd_running) { |
642 | devpriv->ai_cmd_running = 1; |
643 | ret = usbdux_submit_urbs(dev, urbs: devpriv->ai_urbs, |
644 | num_urbs: devpriv->n_ai_urbs, input_urb: 1); |
645 | if (ret < 0) { |
646 | devpriv->ai_cmd_running = 0; |
647 | goto ai_trig_exit; |
648 | } |
649 | s->async->inttrig = NULL; |
650 | } else { |
651 | ret = -EBUSY; |
652 | } |
653 | |
654 | ai_trig_exit: |
655 | mutex_unlock(lock: &devpriv->mut); |
656 | return ret; |
657 | } |
658 | |
659 | static int usbdux_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s) |
660 | { |
661 | struct usbdux_private *devpriv = dev->private; |
662 | struct comedi_cmd *cmd = &s->async->cmd; |
663 | int len = cmd->chanlist_len; |
664 | int ret = -EBUSY; |
665 | int i; |
666 | |
667 | /* block other CPUs from starting an ai_cmd */ |
668 | mutex_lock(&devpriv->mut); |
669 | |
670 | if (devpriv->ai_cmd_running) |
671 | goto ai_cmd_exit; |
672 | |
673 | devpriv->dux_commands[1] = len; |
674 | for (i = 0; i < len; ++i) { |
675 | unsigned int chan = CR_CHAN(cmd->chanlist[i]); |
676 | unsigned int range = CR_RANGE(cmd->chanlist[i]); |
677 | |
678 | devpriv->dux_commands[i + 2] = create_adc_command(chan, range); |
679 | } |
680 | |
681 | ret = send_dux_commands(dev, USBDUX_CMD_MULT_AI); |
682 | if (ret < 0) |
683 | goto ai_cmd_exit; |
684 | |
685 | if (devpriv->high_speed) { |
686 | /* |
687 | * every channel gets a time window of 125us. Thus, if we |
688 | * sample all 8 channels we need 1ms. If we sample only one |
689 | * channel we need only 125us |
690 | */ |
691 | devpriv->ai_interval = 1; |
692 | /* find a power of 2 for the interval */ |
693 | while (devpriv->ai_interval < len) |
694 | devpriv->ai_interval *= 2; |
695 | |
696 | devpriv->ai_timer = cmd->scan_begin_arg / |
697 | (125000 * devpriv->ai_interval); |
698 | } else { |
699 | /* interval always 1ms */ |
700 | devpriv->ai_interval = 1; |
701 | devpriv->ai_timer = cmd->scan_begin_arg / 1000000; |
702 | } |
703 | if (devpriv->ai_timer < 1) { |
704 | ret = -EINVAL; |
705 | goto ai_cmd_exit; |
706 | } |
707 | |
708 | devpriv->ai_counter = devpriv->ai_timer; |
709 | |
710 | if (cmd->start_src == TRIG_NOW) { |
711 | /* enable this acquisition operation */ |
712 | devpriv->ai_cmd_running = 1; |
713 | ret = usbdux_submit_urbs(dev, urbs: devpriv->ai_urbs, |
714 | num_urbs: devpriv->n_ai_urbs, input_urb: 1); |
715 | if (ret < 0) { |
716 | devpriv->ai_cmd_running = 0; |
717 | /* fixme: unlink here?? */ |
718 | goto ai_cmd_exit; |
719 | } |
720 | s->async->inttrig = NULL; |
721 | } else { |
722 | /* TRIG_INT */ |
723 | /* don't enable the acquision operation */ |
724 | /* wait for an internal signal */ |
725 | s->async->inttrig = usbdux_ai_inttrig; |
726 | } |
727 | |
728 | ai_cmd_exit: |
729 | mutex_unlock(lock: &devpriv->mut); |
730 | |
731 | return ret; |
732 | } |
733 | |
734 | /* Mode 0 is used to get a single conversion on demand */ |
735 | static int usbdux_ai_insn_read(struct comedi_device *dev, |
736 | struct comedi_subdevice *s, |
737 | struct comedi_insn *insn, |
738 | unsigned int *data) |
739 | { |
740 | struct usbdux_private *devpriv = dev->private; |
741 | unsigned int chan = CR_CHAN(insn->chanspec); |
742 | unsigned int range = CR_RANGE(insn->chanspec); |
743 | unsigned int val; |
744 | int ret = -EBUSY; |
745 | int i; |
746 | |
747 | mutex_lock(&devpriv->mut); |
748 | |
749 | if (devpriv->ai_cmd_running) |
750 | goto ai_read_exit; |
751 | |
752 | /* set command for the first channel */ |
753 | devpriv->dux_commands[1] = create_adc_command(chan, range); |
754 | |
755 | /* adc commands */ |
756 | ret = send_dux_commands(dev, USBDUX_CMD_SINGLE_AI); |
757 | if (ret < 0) |
758 | goto ai_read_exit; |
759 | |
760 | for (i = 0; i < insn->n; i++) { |
761 | ret = receive_dux_commands(dev, USBDUX_CMD_SINGLE_AI); |
762 | if (ret < 0) |
763 | goto ai_read_exit; |
764 | |
765 | val = le16_to_cpu(devpriv->insn_buf[1]); |
766 | |
767 | /* bipolar data is two's-complement */ |
768 | if (comedi_range_is_bipolar(s, range)) |
769 | val = comedi_offset_munge(s, val); |
770 | |
771 | data[i] = val; |
772 | } |
773 | |
774 | ai_read_exit: |
775 | mutex_unlock(lock: &devpriv->mut); |
776 | |
777 | return ret ? ret : insn->n; |
778 | } |
779 | |
780 | static int usbdux_ao_insn_read(struct comedi_device *dev, |
781 | struct comedi_subdevice *s, |
782 | struct comedi_insn *insn, |
783 | unsigned int *data) |
784 | { |
785 | struct usbdux_private *devpriv = dev->private; |
786 | int ret; |
787 | |
788 | mutex_lock(&devpriv->mut); |
789 | ret = comedi_readback_insn_read(dev, s, insn, data); |
790 | mutex_unlock(lock: &devpriv->mut); |
791 | |
792 | return ret; |
793 | } |
794 | |
795 | static int usbdux_ao_insn_write(struct comedi_device *dev, |
796 | struct comedi_subdevice *s, |
797 | struct comedi_insn *insn, |
798 | unsigned int *data) |
799 | { |
800 | struct usbdux_private *devpriv = dev->private; |
801 | unsigned int chan = CR_CHAN(insn->chanspec); |
802 | __le16 *p = (__le16 *)&devpriv->dux_commands[2]; |
803 | int ret = -EBUSY; |
804 | int i; |
805 | |
806 | mutex_lock(&devpriv->mut); |
807 | |
808 | if (devpriv->ao_cmd_running) |
809 | goto ao_write_exit; |
810 | |
811 | /* number of channels: 1 */ |
812 | devpriv->dux_commands[1] = 1; |
813 | /* channel number */ |
814 | devpriv->dux_commands[4] = chan << 6; |
815 | |
816 | for (i = 0; i < insn->n; i++) { |
817 | unsigned int val = data[i]; |
818 | |
819 | /* one 16 bit value */ |
820 | *p = cpu_to_le16(val); |
821 | |
822 | ret = send_dux_commands(dev, USBDUX_CMD_AO); |
823 | if (ret < 0) |
824 | goto ao_write_exit; |
825 | |
826 | s->readback[chan] = val; |
827 | } |
828 | |
829 | ao_write_exit: |
830 | mutex_unlock(lock: &devpriv->mut); |
831 | |
832 | return ret ? ret : insn->n; |
833 | } |
834 | |
835 | static int usbdux_ao_inttrig(struct comedi_device *dev, |
836 | struct comedi_subdevice *s, |
837 | unsigned int trig_num) |
838 | { |
839 | struct usbdux_private *devpriv = dev->private; |
840 | struct comedi_cmd *cmd = &s->async->cmd; |
841 | int ret; |
842 | |
843 | if (trig_num != cmd->start_arg) |
844 | return -EINVAL; |
845 | |
846 | mutex_lock(&devpriv->mut); |
847 | |
848 | if (!devpriv->ao_cmd_running) { |
849 | devpriv->ao_cmd_running = 1; |
850 | ret = usbdux_submit_urbs(dev, urbs: devpriv->ao_urbs, |
851 | num_urbs: devpriv->n_ao_urbs, input_urb: 0); |
852 | if (ret < 0) { |
853 | devpriv->ao_cmd_running = 0; |
854 | goto ao_trig_exit; |
855 | } |
856 | s->async->inttrig = NULL; |
857 | } else { |
858 | ret = -EBUSY; |
859 | } |
860 | |
861 | ao_trig_exit: |
862 | mutex_unlock(lock: &devpriv->mut); |
863 | return ret; |
864 | } |
865 | |
866 | static int usbdux_ao_cmdtest(struct comedi_device *dev, |
867 | struct comedi_subdevice *s, struct comedi_cmd *cmd) |
868 | { |
869 | int err = 0; |
870 | unsigned int flags; |
871 | |
872 | /* Step 1 : check if triggers are trivially valid */ |
873 | |
874 | err |= comedi_check_trigger_src(src: &cmd->start_src, TRIG_NOW | TRIG_INT); |
875 | |
876 | if (0) { /* (devpriv->high_speed) */ |
877 | /* the sampling rate is set by the coversion rate */ |
878 | flags = TRIG_FOLLOW; |
879 | } else { |
880 | /* start a new scan (output at once) with a timer */ |
881 | flags = TRIG_TIMER; |
882 | } |
883 | err |= comedi_check_trigger_src(src: &cmd->scan_begin_src, flags); |
884 | |
885 | if (0) { /* (devpriv->high_speed) */ |
886 | /* |
887 | * in usb-2.0 only one conversion it transmitted |
888 | * but with 8kHz/n |
889 | */ |
890 | flags = TRIG_TIMER; |
891 | } else { |
892 | /* |
893 | * all conversion events happen simultaneously with |
894 | * a rate of 1kHz/n |
895 | */ |
896 | flags = TRIG_NOW; |
897 | } |
898 | err |= comedi_check_trigger_src(src: &cmd->convert_src, flags); |
899 | |
900 | err |= comedi_check_trigger_src(src: &cmd->scan_end_src, TRIG_COUNT); |
901 | err |= comedi_check_trigger_src(src: &cmd->stop_src, TRIG_COUNT | TRIG_NONE); |
902 | |
903 | if (err) |
904 | return 1; |
905 | |
906 | /* Step 2a : make sure trigger sources are unique */ |
907 | |
908 | err |= comedi_check_trigger_is_unique(src: cmd->start_src); |
909 | err |= comedi_check_trigger_is_unique(src: cmd->stop_src); |
910 | |
911 | /* Step 2b : and mutually compatible */ |
912 | |
913 | if (err) |
914 | return 2; |
915 | |
916 | /* Step 3: check if arguments are trivially valid */ |
917 | |
918 | err |= comedi_check_trigger_arg_is(arg: &cmd->start_arg, val: 0); |
919 | |
920 | if (cmd->scan_begin_src == TRIG_FOLLOW) /* internal trigger */ |
921 | err |= comedi_check_trigger_arg_is(arg: &cmd->scan_begin_arg, val: 0); |
922 | |
923 | if (cmd->scan_begin_src == TRIG_TIMER) { |
924 | err |= comedi_check_trigger_arg_min(arg: &cmd->scan_begin_arg, |
925 | val: 1000000); |
926 | } |
927 | |
928 | /* not used now, is for later use */ |
929 | if (cmd->convert_src == TRIG_TIMER) |
930 | err |= comedi_check_trigger_arg_min(arg: &cmd->convert_arg, val: 125000); |
931 | |
932 | err |= comedi_check_trigger_arg_is(arg: &cmd->scan_end_arg, |
933 | val: cmd->chanlist_len); |
934 | |
935 | if (cmd->stop_src == TRIG_COUNT) |
936 | err |= comedi_check_trigger_arg_min(arg: &cmd->stop_arg, val: 1); |
937 | else /* TRIG_NONE */ |
938 | err |= comedi_check_trigger_arg_is(arg: &cmd->stop_arg, val: 0); |
939 | |
940 | if (err) |
941 | return 3; |
942 | |
943 | return 0; |
944 | } |
945 | |
946 | static int usbdux_ao_cmd(struct comedi_device *dev, struct comedi_subdevice *s) |
947 | { |
948 | struct usbdux_private *devpriv = dev->private; |
949 | struct comedi_cmd *cmd = &s->async->cmd; |
950 | int ret = -EBUSY; |
951 | |
952 | mutex_lock(&devpriv->mut); |
953 | |
954 | if (devpriv->ao_cmd_running) |
955 | goto ao_cmd_exit; |
956 | |
957 | /* we count in steps of 1ms (125us) */ |
958 | /* 125us mode not used yet */ |
959 | if (0) { /* (devpriv->high_speed) */ |
960 | /* 125us */ |
961 | /* timing of the conversion itself: every 125 us */ |
962 | devpriv->ao_timer = cmd->convert_arg / 125000; |
963 | } else { |
964 | /* 1ms */ |
965 | /* timing of the scan: we get all channels at once */ |
966 | devpriv->ao_timer = cmd->scan_begin_arg / 1000000; |
967 | if (devpriv->ao_timer < 1) { |
968 | ret = -EINVAL; |
969 | goto ao_cmd_exit; |
970 | } |
971 | } |
972 | |
973 | devpriv->ao_counter = devpriv->ao_timer; |
974 | |
975 | if (cmd->start_src == TRIG_NOW) { |
976 | /* enable this acquisition operation */ |
977 | devpriv->ao_cmd_running = 1; |
978 | ret = usbdux_submit_urbs(dev, urbs: devpriv->ao_urbs, |
979 | num_urbs: devpriv->n_ao_urbs, input_urb: 0); |
980 | if (ret < 0) { |
981 | devpriv->ao_cmd_running = 0; |
982 | /* fixme: unlink here?? */ |
983 | goto ao_cmd_exit; |
984 | } |
985 | s->async->inttrig = NULL; |
986 | } else { |
987 | /* TRIG_INT */ |
988 | /* submit the urbs later */ |
989 | /* wait for an internal signal */ |
990 | s->async->inttrig = usbdux_ao_inttrig; |
991 | } |
992 | |
993 | ao_cmd_exit: |
994 | mutex_unlock(lock: &devpriv->mut); |
995 | |
996 | return ret; |
997 | } |
998 | |
999 | static int usbdux_dio_insn_config(struct comedi_device *dev, |
1000 | struct comedi_subdevice *s, |
1001 | struct comedi_insn *insn, |
1002 | unsigned int *data) |
1003 | { |
1004 | int ret; |
1005 | |
1006 | ret = comedi_dio_insn_config(dev, s, insn, data, mask: 0); |
1007 | if (ret) |
1008 | return ret; |
1009 | |
1010 | /* |
1011 | * We don't tell the firmware here as it would take 8 frames |
1012 | * to submit the information. We do it in the insn_bits. |
1013 | */ |
1014 | return insn->n; |
1015 | } |
1016 | |
1017 | static int usbdux_dio_insn_bits(struct comedi_device *dev, |
1018 | struct comedi_subdevice *s, |
1019 | struct comedi_insn *insn, |
1020 | unsigned int *data) |
1021 | { |
1022 | struct usbdux_private *devpriv = dev->private; |
1023 | int ret; |
1024 | |
1025 | mutex_lock(&devpriv->mut); |
1026 | |
1027 | comedi_dio_update_state(s, data); |
1028 | |
1029 | /* Always update the hardware. See the (*insn_config). */ |
1030 | devpriv->dux_commands[1] = s->io_bits; |
1031 | devpriv->dux_commands[2] = s->state; |
1032 | |
1033 | /* |
1034 | * This command also tells the firmware to return |
1035 | * the digital input lines. |
1036 | */ |
1037 | ret = send_dux_commands(dev, USBDUX_CMD_DIO_BITS); |
1038 | if (ret < 0) |
1039 | goto dio_exit; |
1040 | ret = receive_dux_commands(dev, USBDUX_CMD_DIO_BITS); |
1041 | if (ret < 0) |
1042 | goto dio_exit; |
1043 | |
1044 | data[1] = le16_to_cpu(devpriv->insn_buf[1]); |
1045 | |
1046 | dio_exit: |
1047 | mutex_unlock(lock: &devpriv->mut); |
1048 | |
1049 | return ret ? ret : insn->n; |
1050 | } |
1051 | |
1052 | static int usbdux_counter_read(struct comedi_device *dev, |
1053 | struct comedi_subdevice *s, |
1054 | struct comedi_insn *insn, |
1055 | unsigned int *data) |
1056 | { |
1057 | struct usbdux_private *devpriv = dev->private; |
1058 | unsigned int chan = CR_CHAN(insn->chanspec); |
1059 | int ret = 0; |
1060 | int i; |
1061 | |
1062 | mutex_lock(&devpriv->mut); |
1063 | |
1064 | for (i = 0; i < insn->n; i++) { |
1065 | ret = send_dux_commands(dev, USBDUX_CMD_TIMER_RD); |
1066 | if (ret < 0) |
1067 | goto counter_read_exit; |
1068 | ret = receive_dux_commands(dev, USBDUX_CMD_TIMER_RD); |
1069 | if (ret < 0) |
1070 | goto counter_read_exit; |
1071 | |
1072 | data[i] = le16_to_cpu(devpriv->insn_buf[chan + 1]); |
1073 | } |
1074 | |
1075 | counter_read_exit: |
1076 | mutex_unlock(lock: &devpriv->mut); |
1077 | |
1078 | return ret ? ret : insn->n; |
1079 | } |
1080 | |
1081 | static int usbdux_counter_write(struct comedi_device *dev, |
1082 | struct comedi_subdevice *s, |
1083 | struct comedi_insn *insn, |
1084 | unsigned int *data) |
1085 | { |
1086 | struct usbdux_private *devpriv = dev->private; |
1087 | unsigned int chan = CR_CHAN(insn->chanspec); |
1088 | __le16 *p = (__le16 *)&devpriv->dux_commands[2]; |
1089 | int ret = 0; |
1090 | int i; |
1091 | |
1092 | mutex_lock(&devpriv->mut); |
1093 | |
1094 | devpriv->dux_commands[1] = chan; |
1095 | |
1096 | for (i = 0; i < insn->n; i++) { |
1097 | *p = cpu_to_le16(data[i]); |
1098 | |
1099 | ret = send_dux_commands(dev, USBDUX_CMD_TIMER_WR); |
1100 | if (ret < 0) |
1101 | break; |
1102 | } |
1103 | |
1104 | mutex_unlock(lock: &devpriv->mut); |
1105 | |
1106 | return ret ? ret : insn->n; |
1107 | } |
1108 | |
1109 | static int usbdux_counter_config(struct comedi_device *dev, |
1110 | struct comedi_subdevice *s, |
1111 | struct comedi_insn *insn, unsigned int *data) |
1112 | { |
1113 | /* nothing to do so far */ |
1114 | return 2; |
1115 | } |
1116 | |
1117 | static void usbduxsub_unlink_pwm_urbs(struct comedi_device *dev) |
1118 | { |
1119 | struct usbdux_private *devpriv = dev->private; |
1120 | |
1121 | usb_kill_urb(urb: devpriv->pwm_urb); |
1122 | } |
1123 | |
1124 | static void usbdux_pwm_stop(struct comedi_device *dev, int do_unlink) |
1125 | { |
1126 | struct usbdux_private *devpriv = dev->private; |
1127 | |
1128 | if (do_unlink) |
1129 | usbduxsub_unlink_pwm_urbs(dev); |
1130 | |
1131 | devpriv->pwm_cmd_running = 0; |
1132 | } |
1133 | |
1134 | static int usbdux_pwm_cancel(struct comedi_device *dev, |
1135 | struct comedi_subdevice *s) |
1136 | { |
1137 | struct usbdux_private *devpriv = dev->private; |
1138 | int ret; |
1139 | |
1140 | mutex_lock(&devpriv->mut); |
1141 | /* unlink only if it is really running */ |
1142 | usbdux_pwm_stop(dev, do_unlink: devpriv->pwm_cmd_running); |
1143 | ret = send_dux_commands(dev, USBDUX_CMD_PWM_OFF); |
1144 | mutex_unlock(lock: &devpriv->mut); |
1145 | |
1146 | return ret; |
1147 | } |
1148 | |
1149 | static void usbduxsub_pwm_irq(struct urb *urb) |
1150 | { |
1151 | struct comedi_device *dev = urb->context; |
1152 | struct usbdux_private *devpriv = dev->private; |
1153 | int ret; |
1154 | |
1155 | switch (urb->status) { |
1156 | case 0: |
1157 | /* success */ |
1158 | break; |
1159 | |
1160 | case -ECONNRESET: |
1161 | case -ENOENT: |
1162 | case -ESHUTDOWN: |
1163 | case -ECONNABORTED: |
1164 | /* |
1165 | * after an unlink command, unplug, ... etc |
1166 | * no unlink needed here. Already shutting down. |
1167 | */ |
1168 | if (devpriv->pwm_cmd_running) |
1169 | usbdux_pwm_stop(dev, do_unlink: 0); |
1170 | |
1171 | return; |
1172 | |
1173 | default: |
1174 | /* a real error */ |
1175 | if (devpriv->pwm_cmd_running) { |
1176 | dev_err(dev->class_dev, |
1177 | "Non-zero urb status received in pwm intr context: %d\n" , |
1178 | urb->status); |
1179 | usbdux_pwm_stop(dev, do_unlink: 0); |
1180 | } |
1181 | return; |
1182 | } |
1183 | |
1184 | /* are we actually running? */ |
1185 | if (!devpriv->pwm_cmd_running) |
1186 | return; |
1187 | |
1188 | urb->transfer_buffer_length = devpriv->pwm_buf_sz; |
1189 | urb->dev = comedi_to_usb_dev(dev); |
1190 | urb->status = 0; |
1191 | if (devpriv->pwm_cmd_running) { |
1192 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
1193 | if (ret < 0) { |
1194 | dev_err(dev->class_dev, |
1195 | "pwm urb resubm failed in int-cont. ret=%d" , |
1196 | ret); |
1197 | if (ret == -EL2NSYNC) |
1198 | dev_err(dev->class_dev, |
1199 | "buggy USB host controller or bug in IRQ handling!\n" ); |
1200 | |
1201 | /* don't do an unlink here */ |
1202 | usbdux_pwm_stop(dev, do_unlink: 0); |
1203 | } |
1204 | } |
1205 | } |
1206 | |
1207 | static int usbduxsub_submit_pwm_urbs(struct comedi_device *dev) |
1208 | { |
1209 | struct usb_device *usb = comedi_to_usb_dev(dev); |
1210 | struct usbdux_private *devpriv = dev->private; |
1211 | struct urb *urb = devpriv->pwm_urb; |
1212 | |
1213 | /* in case of a resubmission after an unlink... */ |
1214 | usb_fill_bulk_urb(urb, dev: usb, usb_sndbulkpipe(usb, 4), |
1215 | transfer_buffer: urb->transfer_buffer, |
1216 | buffer_length: devpriv->pwm_buf_sz, |
1217 | complete_fn: usbduxsub_pwm_irq, |
1218 | context: dev); |
1219 | |
1220 | return usb_submit_urb(urb, GFP_ATOMIC); |
1221 | } |
1222 | |
1223 | static int usbdux_pwm_period(struct comedi_device *dev, |
1224 | struct comedi_subdevice *s, |
1225 | unsigned int period) |
1226 | { |
1227 | struct usbdux_private *devpriv = dev->private; |
1228 | int fx2delay; |
1229 | |
1230 | if (period < MIN_PWM_PERIOD) |
1231 | return -EAGAIN; |
1232 | |
1233 | fx2delay = (period / (6 * 512 * 1000 / 33)) - 6; |
1234 | if (fx2delay > 255) |
1235 | return -EAGAIN; |
1236 | |
1237 | devpriv->pwm_delay = fx2delay; |
1238 | devpriv->pwm_period = period; |
1239 | |
1240 | return 0; |
1241 | } |
1242 | |
1243 | static int usbdux_pwm_start(struct comedi_device *dev, |
1244 | struct comedi_subdevice *s) |
1245 | { |
1246 | struct usbdux_private *devpriv = dev->private; |
1247 | int ret = 0; |
1248 | |
1249 | mutex_lock(&devpriv->mut); |
1250 | |
1251 | if (devpriv->pwm_cmd_running) |
1252 | goto pwm_start_exit; |
1253 | |
1254 | devpriv->dux_commands[1] = devpriv->pwm_delay; |
1255 | ret = send_dux_commands(dev, USBDUX_CMD_PWM_ON); |
1256 | if (ret < 0) |
1257 | goto pwm_start_exit; |
1258 | |
1259 | /* initialise the buffer */ |
1260 | memset(devpriv->pwm_urb->transfer_buffer, 0, devpriv->pwm_buf_sz); |
1261 | |
1262 | devpriv->pwm_cmd_running = 1; |
1263 | ret = usbduxsub_submit_pwm_urbs(dev); |
1264 | if (ret < 0) |
1265 | devpriv->pwm_cmd_running = 0; |
1266 | |
1267 | pwm_start_exit: |
1268 | mutex_unlock(lock: &devpriv->mut); |
1269 | |
1270 | return ret; |
1271 | } |
1272 | |
1273 | static void usbdux_pwm_pattern(struct comedi_device *dev, |
1274 | struct comedi_subdevice *s, |
1275 | unsigned int chan, |
1276 | unsigned int value, |
1277 | unsigned int sign) |
1278 | { |
1279 | struct usbdux_private *devpriv = dev->private; |
1280 | char pwm_mask = (1 << chan); /* DIO bit for the PWM data */ |
1281 | char sgn_mask = (16 << chan); /* DIO bit for the sign */ |
1282 | char *buf = (char *)(devpriv->pwm_urb->transfer_buffer); |
1283 | int szbuf = devpriv->pwm_buf_sz; |
1284 | int i; |
1285 | |
1286 | for (i = 0; i < szbuf; i++) { |
1287 | char c = *buf; |
1288 | |
1289 | c &= ~pwm_mask; |
1290 | if (i < value) |
1291 | c |= pwm_mask; |
1292 | if (!sign) |
1293 | c &= ~sgn_mask; |
1294 | else |
1295 | c |= sgn_mask; |
1296 | *buf++ = c; |
1297 | } |
1298 | } |
1299 | |
1300 | static int usbdux_pwm_write(struct comedi_device *dev, |
1301 | struct comedi_subdevice *s, |
1302 | struct comedi_insn *insn, |
1303 | unsigned int *data) |
1304 | { |
1305 | unsigned int chan = CR_CHAN(insn->chanspec); |
1306 | |
1307 | /* |
1308 | * It doesn't make sense to support more than one value here |
1309 | * because it would just overwrite the PWM buffer. |
1310 | */ |
1311 | if (insn->n != 1) |
1312 | return -EINVAL; |
1313 | |
1314 | /* |
1315 | * The sign is set via a special INSN only, this gives us 8 bits |
1316 | * for normal operation, sign is 0 by default. |
1317 | */ |
1318 | usbdux_pwm_pattern(dev, s, chan, value: data[0], sign: 0); |
1319 | |
1320 | return insn->n; |
1321 | } |
1322 | |
1323 | static int usbdux_pwm_config(struct comedi_device *dev, |
1324 | struct comedi_subdevice *s, |
1325 | struct comedi_insn *insn, |
1326 | unsigned int *data) |
1327 | { |
1328 | struct usbdux_private *devpriv = dev->private; |
1329 | unsigned int chan = CR_CHAN(insn->chanspec); |
1330 | |
1331 | switch (data[0]) { |
1332 | case INSN_CONFIG_ARM: |
1333 | /* |
1334 | * if not zero the PWM is limited to a certain time which is |
1335 | * not supported here |
1336 | */ |
1337 | if (data[1] != 0) |
1338 | return -EINVAL; |
1339 | return usbdux_pwm_start(dev, s); |
1340 | case INSN_CONFIG_DISARM: |
1341 | return usbdux_pwm_cancel(dev, s); |
1342 | case INSN_CONFIG_GET_PWM_STATUS: |
1343 | data[1] = devpriv->pwm_cmd_running; |
1344 | return 0; |
1345 | case INSN_CONFIG_PWM_SET_PERIOD: |
1346 | return usbdux_pwm_period(dev, s, period: data[1]); |
1347 | case INSN_CONFIG_PWM_GET_PERIOD: |
1348 | data[1] = devpriv->pwm_period; |
1349 | return 0; |
1350 | case INSN_CONFIG_PWM_SET_H_BRIDGE: |
1351 | /* |
1352 | * data[1] = value |
1353 | * data[2] = sign (for a relay) |
1354 | */ |
1355 | usbdux_pwm_pattern(dev, s, chan, value: data[1], sign: (data[2] != 0)); |
1356 | return 0; |
1357 | case INSN_CONFIG_PWM_GET_H_BRIDGE: |
1358 | /* values are not kept in this driver, nothing to return here */ |
1359 | return -EINVAL; |
1360 | } |
1361 | return -EINVAL; |
1362 | } |
1363 | |
1364 | static int usbdux_firmware_upload(struct comedi_device *dev, |
1365 | const u8 *data, size_t size, |
1366 | unsigned long context) |
1367 | { |
1368 | struct usb_device *usb = comedi_to_usb_dev(dev); |
1369 | u8 *buf; |
1370 | u8 *tmp; |
1371 | int ret; |
1372 | |
1373 | if (!data) |
1374 | return 0; |
1375 | |
1376 | if (size > USBDUX_FIRMWARE_MAX_LEN) { |
1377 | dev_err(dev->class_dev, |
1378 | "usbdux firmware binary it too large for FX2.\n" ); |
1379 | return -ENOMEM; |
1380 | } |
1381 | |
1382 | /* we generate a local buffer for the firmware */ |
1383 | buf = kmemdup(p: data, size, GFP_KERNEL); |
1384 | if (!buf) |
1385 | return -ENOMEM; |
1386 | |
1387 | /* we need a malloc'ed buffer for usb_control_msg() */ |
1388 | tmp = kmalloc(size: 1, GFP_KERNEL); |
1389 | if (!tmp) { |
1390 | kfree(objp: buf); |
1391 | return -ENOMEM; |
1392 | } |
1393 | |
1394 | /* stop the current firmware on the device */ |
1395 | *tmp = 1; /* 7f92 to one */ |
1396 | ret = usb_control_msg(dev: usb, usb_sndctrlpipe(usb, 0), |
1397 | USBDUX_FIRMWARE_CMD, |
1398 | VENDOR_DIR_OUT, |
1399 | USBDUX_CPU_CS, index: 0x0000, |
1400 | data: tmp, size: 1, |
1401 | BULK_TIMEOUT); |
1402 | if (ret < 0) { |
1403 | dev_err(dev->class_dev, "can not stop firmware\n" ); |
1404 | goto done; |
1405 | } |
1406 | |
1407 | /* upload the new firmware to the device */ |
1408 | ret = usb_control_msg(dev: usb, usb_sndctrlpipe(usb, 0), |
1409 | USBDUX_FIRMWARE_CMD, |
1410 | VENDOR_DIR_OUT, |
1411 | value: 0, index: 0x0000, |
1412 | data: buf, size, |
1413 | BULK_TIMEOUT); |
1414 | if (ret < 0) { |
1415 | dev_err(dev->class_dev, "firmware upload failed\n" ); |
1416 | goto done; |
1417 | } |
1418 | |
1419 | /* start the new firmware on the device */ |
1420 | *tmp = 0; /* 7f92 to zero */ |
1421 | ret = usb_control_msg(dev: usb, usb_sndctrlpipe(usb, 0), |
1422 | USBDUX_FIRMWARE_CMD, |
1423 | VENDOR_DIR_OUT, |
1424 | USBDUX_CPU_CS, index: 0x0000, |
1425 | data: tmp, size: 1, |
1426 | BULK_TIMEOUT); |
1427 | if (ret < 0) |
1428 | dev_err(dev->class_dev, "can not start firmware\n" ); |
1429 | |
1430 | done: |
1431 | kfree(objp: tmp); |
1432 | kfree(objp: buf); |
1433 | return ret; |
1434 | } |
1435 | |
1436 | static int usbdux_alloc_usb_buffers(struct comedi_device *dev) |
1437 | { |
1438 | struct usb_device *usb = comedi_to_usb_dev(dev); |
1439 | struct usbdux_private *devpriv = dev->private; |
1440 | struct urb *urb; |
1441 | int i; |
1442 | |
1443 | devpriv->dux_commands = kzalloc(SIZEOFDUXBUFFER, GFP_KERNEL); |
1444 | devpriv->in_buf = kzalloc(SIZEINBUF, GFP_KERNEL); |
1445 | devpriv->insn_buf = kzalloc(SIZEINSNBUF, GFP_KERNEL); |
1446 | devpriv->ai_urbs = kcalloc(n: devpriv->n_ai_urbs, size: sizeof(void *), |
1447 | GFP_KERNEL); |
1448 | devpriv->ao_urbs = kcalloc(n: devpriv->n_ao_urbs, size: sizeof(void *), |
1449 | GFP_KERNEL); |
1450 | if (!devpriv->dux_commands || !devpriv->in_buf || !devpriv->insn_buf || |
1451 | !devpriv->ai_urbs || !devpriv->ao_urbs) |
1452 | return -ENOMEM; |
1453 | |
1454 | for (i = 0; i < devpriv->n_ai_urbs; i++) { |
1455 | /* one frame: 1ms */ |
1456 | urb = usb_alloc_urb(iso_packets: 1, GFP_KERNEL); |
1457 | if (!urb) |
1458 | return -ENOMEM; |
1459 | devpriv->ai_urbs[i] = urb; |
1460 | |
1461 | urb->dev = usb; |
1462 | urb->context = dev; |
1463 | urb->pipe = usb_rcvisocpipe(usb, 6); |
1464 | urb->transfer_flags = URB_ISO_ASAP; |
1465 | urb->transfer_buffer = kzalloc(SIZEINBUF, GFP_KERNEL); |
1466 | if (!urb->transfer_buffer) |
1467 | return -ENOMEM; |
1468 | |
1469 | urb->complete = usbduxsub_ai_isoc_irq; |
1470 | urb->number_of_packets = 1; |
1471 | urb->transfer_buffer_length = SIZEINBUF; |
1472 | urb->iso_frame_desc[0].offset = 0; |
1473 | urb->iso_frame_desc[0].length = SIZEINBUF; |
1474 | } |
1475 | |
1476 | for (i = 0; i < devpriv->n_ao_urbs; i++) { |
1477 | /* one frame: 1ms */ |
1478 | urb = usb_alloc_urb(iso_packets: 1, GFP_KERNEL); |
1479 | if (!urb) |
1480 | return -ENOMEM; |
1481 | devpriv->ao_urbs[i] = urb; |
1482 | |
1483 | urb->dev = usb; |
1484 | urb->context = dev; |
1485 | urb->pipe = usb_sndisocpipe(usb, 2); |
1486 | urb->transfer_flags = URB_ISO_ASAP; |
1487 | urb->transfer_buffer = kzalloc(SIZEOUTBUF, GFP_KERNEL); |
1488 | if (!urb->transfer_buffer) |
1489 | return -ENOMEM; |
1490 | |
1491 | urb->complete = usbduxsub_ao_isoc_irq; |
1492 | urb->number_of_packets = 1; |
1493 | urb->transfer_buffer_length = SIZEOUTBUF; |
1494 | urb->iso_frame_desc[0].offset = 0; |
1495 | urb->iso_frame_desc[0].length = SIZEOUTBUF; |
1496 | if (devpriv->high_speed) |
1497 | urb->interval = 8; /* uframes */ |
1498 | else |
1499 | urb->interval = 1; /* frames */ |
1500 | } |
1501 | |
1502 | /* pwm */ |
1503 | if (devpriv->pwm_buf_sz) { |
1504 | urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL); |
1505 | if (!urb) |
1506 | return -ENOMEM; |
1507 | devpriv->pwm_urb = urb; |
1508 | |
1509 | /* max bulk ep size in high speed */ |
1510 | urb->transfer_buffer = kzalloc(size: devpriv->pwm_buf_sz, |
1511 | GFP_KERNEL); |
1512 | if (!urb->transfer_buffer) |
1513 | return -ENOMEM; |
1514 | } |
1515 | |
1516 | return 0; |
1517 | } |
1518 | |
1519 | static void usbdux_free_usb_buffers(struct comedi_device *dev) |
1520 | { |
1521 | struct usbdux_private *devpriv = dev->private; |
1522 | struct urb *urb; |
1523 | int i; |
1524 | |
1525 | urb = devpriv->pwm_urb; |
1526 | if (urb) { |
1527 | kfree(objp: urb->transfer_buffer); |
1528 | usb_free_urb(urb); |
1529 | } |
1530 | if (devpriv->ao_urbs) { |
1531 | for (i = 0; i < devpriv->n_ao_urbs; i++) { |
1532 | urb = devpriv->ao_urbs[i]; |
1533 | if (urb) { |
1534 | kfree(objp: urb->transfer_buffer); |
1535 | usb_free_urb(urb); |
1536 | } |
1537 | } |
1538 | kfree(objp: devpriv->ao_urbs); |
1539 | } |
1540 | if (devpriv->ai_urbs) { |
1541 | for (i = 0; i < devpriv->n_ai_urbs; i++) { |
1542 | urb = devpriv->ai_urbs[i]; |
1543 | if (urb) { |
1544 | kfree(objp: urb->transfer_buffer); |
1545 | usb_free_urb(urb); |
1546 | } |
1547 | } |
1548 | kfree(objp: devpriv->ai_urbs); |
1549 | } |
1550 | kfree(objp: devpriv->insn_buf); |
1551 | kfree(objp: devpriv->in_buf); |
1552 | kfree(objp: devpriv->dux_commands); |
1553 | } |
1554 | |
1555 | static int usbdux_auto_attach(struct comedi_device *dev, |
1556 | unsigned long context_unused) |
1557 | { |
1558 | struct usb_interface *intf = comedi_to_usb_interface(dev); |
1559 | struct usb_device *usb = comedi_to_usb_dev(dev); |
1560 | struct usbdux_private *devpriv; |
1561 | struct comedi_subdevice *s; |
1562 | int ret; |
1563 | |
1564 | devpriv = comedi_alloc_devpriv(dev, size: sizeof(*devpriv)); |
1565 | if (!devpriv) |
1566 | return -ENOMEM; |
1567 | |
1568 | mutex_init(&devpriv->mut); |
1569 | |
1570 | usb_set_intfdata(intf, data: devpriv); |
1571 | |
1572 | devpriv->high_speed = (usb->speed == USB_SPEED_HIGH); |
1573 | if (devpriv->high_speed) { |
1574 | devpriv->n_ai_urbs = NUMOFINBUFFERSHIGH; |
1575 | devpriv->n_ao_urbs = NUMOFOUTBUFFERSHIGH; |
1576 | devpriv->pwm_buf_sz = 512; |
1577 | } else { |
1578 | devpriv->n_ai_urbs = NUMOFINBUFFERSFULL; |
1579 | devpriv->n_ao_urbs = NUMOFOUTBUFFERSFULL; |
1580 | } |
1581 | |
1582 | ret = usbdux_alloc_usb_buffers(dev); |
1583 | if (ret) |
1584 | return ret; |
1585 | |
1586 | /* setting to alternate setting 3: enabling iso ep and bulk ep. */ |
1587 | ret = usb_set_interface(dev: usb, ifnum: intf->altsetting->desc.bInterfaceNumber, |
1588 | alternate: 3); |
1589 | if (ret < 0) { |
1590 | dev_err(dev->class_dev, |
1591 | "could not set alternate setting 3 in high speed\n" ); |
1592 | return ret; |
1593 | } |
1594 | |
1595 | ret = comedi_load_firmware(dev, hw_dev: &usb->dev, USBDUX_FIRMWARE, |
1596 | cb: usbdux_firmware_upload, context: 0); |
1597 | if (ret < 0) |
1598 | return ret; |
1599 | |
1600 | ret = comedi_alloc_subdevices(dev, num_subdevices: (devpriv->high_speed) ? 5 : 4); |
1601 | if (ret) |
1602 | return ret; |
1603 | |
1604 | /* Analog Input subdevice */ |
1605 | s = &dev->subdevices[0]; |
1606 | dev->read_subdev = s; |
1607 | s->type = COMEDI_SUBD_AI; |
1608 | s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ; |
1609 | s->n_chan = 8; |
1610 | s->maxdata = 0x0fff; |
1611 | s->len_chanlist = 8; |
1612 | s->range_table = &range_usbdux_ai_range; |
1613 | s->insn_read = usbdux_ai_insn_read; |
1614 | s->do_cmdtest = usbdux_ai_cmdtest; |
1615 | s->do_cmd = usbdux_ai_cmd; |
1616 | s->cancel = usbdux_ai_cancel; |
1617 | |
1618 | /* Analog Output subdevice */ |
1619 | s = &dev->subdevices[1]; |
1620 | dev->write_subdev = s; |
1621 | s->type = COMEDI_SUBD_AO; |
1622 | s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_CMD_WRITE; |
1623 | s->n_chan = 4; |
1624 | s->maxdata = 0x0fff; |
1625 | s->len_chanlist = s->n_chan; |
1626 | s->range_table = &range_usbdux_ao_range; |
1627 | s->do_cmdtest = usbdux_ao_cmdtest; |
1628 | s->do_cmd = usbdux_ao_cmd; |
1629 | s->cancel = usbdux_ao_cancel; |
1630 | s->insn_read = usbdux_ao_insn_read; |
1631 | s->insn_write = usbdux_ao_insn_write; |
1632 | |
1633 | ret = comedi_alloc_subdev_readback(s); |
1634 | if (ret) |
1635 | return ret; |
1636 | |
1637 | /* Digital I/O subdevice */ |
1638 | s = &dev->subdevices[2]; |
1639 | s->type = COMEDI_SUBD_DIO; |
1640 | s->subdev_flags = SDF_READABLE | SDF_WRITABLE; |
1641 | s->n_chan = 8; |
1642 | s->maxdata = 1; |
1643 | s->range_table = &range_digital; |
1644 | s->insn_bits = usbdux_dio_insn_bits; |
1645 | s->insn_config = usbdux_dio_insn_config; |
1646 | |
1647 | /* Counter subdevice */ |
1648 | s = &dev->subdevices[3]; |
1649 | s->type = COMEDI_SUBD_COUNTER; |
1650 | s->subdev_flags = SDF_WRITABLE | SDF_READABLE; |
1651 | s->n_chan = 4; |
1652 | s->maxdata = 0xffff; |
1653 | s->insn_read = usbdux_counter_read; |
1654 | s->insn_write = usbdux_counter_write; |
1655 | s->insn_config = usbdux_counter_config; |
1656 | |
1657 | if (devpriv->high_speed) { |
1658 | /* PWM subdevice */ |
1659 | s = &dev->subdevices[4]; |
1660 | s->type = COMEDI_SUBD_PWM; |
1661 | s->subdev_flags = SDF_WRITABLE | SDF_PWM_HBRIDGE; |
1662 | s->n_chan = 8; |
1663 | s->maxdata = devpriv->pwm_buf_sz; |
1664 | s->insn_write = usbdux_pwm_write; |
1665 | s->insn_config = usbdux_pwm_config; |
1666 | |
1667 | usbdux_pwm_period(dev, s, PWM_DEFAULT_PERIOD); |
1668 | } |
1669 | |
1670 | return 0; |
1671 | } |
1672 | |
1673 | static void usbdux_detach(struct comedi_device *dev) |
1674 | { |
1675 | struct usb_interface *intf = comedi_to_usb_interface(dev); |
1676 | struct usbdux_private *devpriv = dev->private; |
1677 | |
1678 | usb_set_intfdata(intf, NULL); |
1679 | |
1680 | if (!devpriv) |
1681 | return; |
1682 | |
1683 | mutex_lock(&devpriv->mut); |
1684 | |
1685 | /* force unlink all urbs */ |
1686 | usbdux_pwm_stop(dev, do_unlink: 1); |
1687 | usbdux_ao_stop(dev, do_unlink: 1); |
1688 | usbdux_ai_stop(dev, do_unlink: 1); |
1689 | |
1690 | usbdux_free_usb_buffers(dev); |
1691 | |
1692 | mutex_unlock(lock: &devpriv->mut); |
1693 | |
1694 | mutex_destroy(lock: &devpriv->mut); |
1695 | } |
1696 | |
1697 | static struct comedi_driver usbdux_driver = { |
1698 | .driver_name = "usbdux" , |
1699 | .module = THIS_MODULE, |
1700 | .auto_attach = usbdux_auto_attach, |
1701 | .detach = usbdux_detach, |
1702 | }; |
1703 | |
1704 | static int usbdux_usb_probe(struct usb_interface *intf, |
1705 | const struct usb_device_id *id) |
1706 | { |
1707 | return comedi_usb_auto_config(intf, driver: &usbdux_driver, context: 0); |
1708 | } |
1709 | |
1710 | static const struct usb_device_id usbdux_usb_table[] = { |
1711 | { USB_DEVICE(0x13d8, 0x0001) }, |
1712 | { USB_DEVICE(0x13d8, 0x0002) }, |
1713 | { } |
1714 | }; |
1715 | MODULE_DEVICE_TABLE(usb, usbdux_usb_table); |
1716 | |
1717 | static struct usb_driver usbdux_usb_driver = { |
1718 | .name = "usbdux" , |
1719 | .probe = usbdux_usb_probe, |
1720 | .disconnect = comedi_usb_auto_unconfig, |
1721 | .id_table = usbdux_usb_table, |
1722 | }; |
1723 | module_comedi_usb_driver(usbdux_driver, usbdux_usb_driver); |
1724 | |
1725 | MODULE_AUTHOR("Bernd Porr, BerndPorr@f2s.com" ); |
1726 | MODULE_DESCRIPTION("Stirling/ITL USB-DUX -- Bernd.Porr@f2s.com" ); |
1727 | MODULE_LICENSE("GPL" ); |
1728 | MODULE_FIRMWARE(USBDUX_FIRMWARE); |
1729 | |