1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * usbduxsigma.c |
4 | * Copyright (C) 2011-2015 Bernd Porr, mail@berndporr.me.uk |
5 | */ |
6 | |
7 | /* |
8 | * Driver: usbduxsigma |
9 | * Description: University of Stirling USB DAQ & INCITE Technology Limited |
10 | * Devices: [ITL] USB-DUX-SIGMA (usbduxsigma) |
11 | * Author: Bernd Porr <mail@berndporr.me.uk> |
12 | * Updated: 20 July 2015 |
13 | * Status: stable |
14 | */ |
15 | |
16 | /* |
17 | * I must give credit here to Chris Baugher who |
18 | * wrote the driver for AT-MIO-16d. I used some parts of this |
19 | * driver. I also must give credits to David Brownell |
20 | * who supported me with the USB development. |
21 | * |
22 | * Note: the raw data from the A/D converter is 24 bit big endian |
23 | * anything else is little endian to/from the dux board |
24 | * |
25 | * |
26 | * Revision history: |
27 | * 0.1: initial version |
28 | * 0.2: all basic functions implemented, digital I/O only for one port |
29 | * 0.3: proper vendor ID and driver name |
30 | * 0.4: fixed D/A voltage range |
31 | * 0.5: various bug fixes, health check at startup |
32 | * 0.6: corrected wrong input range |
33 | * 0.7: rewrite code that urb->interval is always 1 |
34 | */ |
35 | |
36 | #include <linux/kernel.h> |
37 | #include <linux/module.h> |
38 | #include <linux/slab.h> |
39 | #include <linux/input.h> |
40 | #include <linux/fcntl.h> |
41 | #include <linux/compiler.h> |
42 | #include <asm/unaligned.h> |
43 | #include <linux/comedi/comedi_usb.h> |
44 | |
45 | /* timeout for the USB-transfer in ms*/ |
46 | #define BULK_TIMEOUT 1000 |
47 | |
48 | /* constants for "firmware" upload and download */ |
49 | #define FIRMWARE "usbduxsigma_firmware.bin" |
50 | #define FIRMWARE_MAX_LEN 0x4000 |
51 | #define USBDUXSUB_FIRMWARE 0xa0 |
52 | #define VENDOR_DIR_IN 0xc0 |
53 | #define VENDOR_DIR_OUT 0x40 |
54 | |
55 | /* internal addresses of the 8051 processor */ |
56 | #define USBDUXSUB_CPUCS 0xE600 |
57 | |
58 | /* 300Hz max frequ under PWM */ |
59 | #define MIN_PWM_PERIOD ((long)(1E9 / 300)) |
60 | |
61 | /* Default PWM frequency */ |
62 | #define PWM_DEFAULT_PERIOD ((long)(1E9 / 100)) |
63 | |
64 | /* Number of channels (16 AD and offset)*/ |
65 | #define NUMCHANNELS 16 |
66 | |
67 | /* Size of one A/D value */ |
68 | #define SIZEADIN ((sizeof(u32))) |
69 | |
70 | /* |
71 | * Size of the async input-buffer IN BYTES, the DIO state is transmitted |
72 | * as the first byte. |
73 | */ |
74 | #define SIZEINBUF (((NUMCHANNELS + 1) * SIZEADIN)) |
75 | |
76 | /* 16 bytes. */ |
77 | #define SIZEINSNBUF 16 |
78 | |
79 | /* Number of DA channels */ |
80 | #define NUMOUTCHANNELS 8 |
81 | |
82 | /* size of one value for the D/A converter: channel and value */ |
83 | #define SIZEDAOUT ((sizeof(u8) + sizeof(uint16_t))) |
84 | |
85 | /* |
86 | * Size of the output-buffer in bytes |
87 | * Actually only the first 4 triplets are used but for the |
88 | * high speed mode we need to pad it to 8 (microframes). |
89 | */ |
90 | #define SIZEOUTBUF ((8 * SIZEDAOUT)) |
91 | |
92 | /* |
93 | * Size of the buffer for the dux commands: just now max size is determined |
94 | * by the analogue out + command byte + panic bytes... |
95 | */ |
96 | #define SIZEOFDUXBUFFER ((8 * SIZEDAOUT + 2)) |
97 | |
98 | /* Number of in-URBs which receive the data: min=2 */ |
99 | #define NUMOFINBUFFERSFULL 5 |
100 | |
101 | /* Number of out-URBs which send the data: min=2 */ |
102 | #define NUMOFOUTBUFFERSFULL 5 |
103 | |
104 | /* Number of in-URBs which receive the data: min=5 */ |
105 | /* must have more buffers due to buggy USB ctr */ |
106 | #define NUMOFINBUFFERSHIGH 10 |
107 | |
108 | /* Number of out-URBs which send the data: min=5 */ |
109 | /* must have more buffers due to buggy USB ctr */ |
110 | #define NUMOFOUTBUFFERSHIGH 10 |
111 | |
112 | /* number of retries to get the right dux command */ |
113 | #define RETRIES 10 |
114 | |
115 | /* bulk transfer commands to usbduxsigma */ |
116 | #define USBBUXSIGMA_AD_CMD 9 |
117 | #define USBDUXSIGMA_DA_CMD 1 |
118 | #define USBDUXSIGMA_DIO_CFG_CMD 2 |
119 | #define USBDUXSIGMA_DIO_BITS_CMD 3 |
120 | #define USBDUXSIGMA_SINGLE_AD_CMD 4 |
121 | #define USBDUXSIGMA_PWM_ON_CMD 7 |
122 | #define USBDUXSIGMA_PWM_OFF_CMD 8 |
123 | |
124 | static const struct comedi_lrange usbduxsigma_ai_range = { |
125 | 1, { |
126 | BIP_RANGE(2.5 * 0x800000 / 0x780000 / 2.0) |
127 | } |
128 | }; |
129 | |
130 | struct usbduxsigma_private { |
131 | /* actual number of in-buffers */ |
132 | int n_ai_urbs; |
133 | /* actual number of out-buffers */ |
134 | int n_ao_urbs; |
135 | /* ISO-transfer handling: buffers */ |
136 | struct urb **ai_urbs; |
137 | struct urb **ao_urbs; |
138 | /* pwm-transfer handling */ |
139 | struct urb *pwm_urb; |
140 | /* PWM period */ |
141 | unsigned int pwm_period; |
142 | /* PWM internal delay for the GPIF in the FX2 */ |
143 | u8 pwm_delay; |
144 | /* size of the PWM buffer which holds the bit pattern */ |
145 | int pwm_buf_sz; |
146 | /* input buffer for the ISO-transfer */ |
147 | __be32 *in_buf; |
148 | /* input buffer for single insn */ |
149 | u8 *insn_buf; |
150 | |
151 | unsigned high_speed:1; |
152 | unsigned ai_cmd_running:1; |
153 | unsigned ao_cmd_running:1; |
154 | unsigned pwm_cmd_running:1; |
155 | |
156 | /* time between samples in units of the timer */ |
157 | unsigned int ai_timer; |
158 | unsigned int ao_timer; |
159 | /* counter between acquisitions */ |
160 | unsigned int ai_counter; |
161 | unsigned int ao_counter; |
162 | /* interval in frames/uframes */ |
163 | unsigned int ai_interval; |
164 | /* commands */ |
165 | u8 *dux_commands; |
166 | struct mutex mut; |
167 | }; |
168 | |
169 | static void usbduxsigma_unlink_urbs(struct urb **urbs, int num_urbs) |
170 | { |
171 | int i; |
172 | |
173 | for (i = 0; i < num_urbs; i++) |
174 | usb_kill_urb(urb: urbs[i]); |
175 | } |
176 | |
177 | static void usbduxsigma_ai_stop(struct comedi_device *dev, int do_unlink) |
178 | { |
179 | struct usbduxsigma_private *devpriv = dev->private; |
180 | |
181 | if (do_unlink && devpriv->ai_urbs) |
182 | usbduxsigma_unlink_urbs(urbs: devpriv->ai_urbs, num_urbs: devpriv->n_ai_urbs); |
183 | |
184 | devpriv->ai_cmd_running = 0; |
185 | } |
186 | |
187 | static int usbduxsigma_ai_cancel(struct comedi_device *dev, |
188 | struct comedi_subdevice *s) |
189 | { |
190 | struct usbduxsigma_private *devpriv = dev->private; |
191 | |
192 | mutex_lock(&devpriv->mut); |
193 | /* unlink only if it is really running */ |
194 | usbduxsigma_ai_stop(dev, do_unlink: devpriv->ai_cmd_running); |
195 | mutex_unlock(lock: &devpriv->mut); |
196 | |
197 | return 0; |
198 | } |
199 | |
200 | static void usbduxsigma_ai_handle_urb(struct comedi_device *dev, |
201 | struct comedi_subdevice *s, |
202 | struct urb *urb) |
203 | { |
204 | struct usbduxsigma_private *devpriv = dev->private; |
205 | struct comedi_async *async = s->async; |
206 | struct comedi_cmd *cmd = &async->cmd; |
207 | u32 val; |
208 | int ret; |
209 | int i; |
210 | |
211 | if ((urb->actual_length > 0) && (urb->status != -EXDEV)) { |
212 | devpriv->ai_counter--; |
213 | if (devpriv->ai_counter == 0) { |
214 | devpriv->ai_counter = devpriv->ai_timer; |
215 | |
216 | /* |
217 | * Get the data from the USB bus and hand it over |
218 | * to comedi. Note, first byte is the DIO state. |
219 | */ |
220 | for (i = 0; i < cmd->chanlist_len; i++) { |
221 | val = be32_to_cpu(devpriv->in_buf[i + 1]); |
222 | val &= 0x00ffffff; /* strip status byte */ |
223 | val = comedi_offset_munge(s, val); |
224 | if (!comedi_buf_write_samples(s, data: &val, nsamples: 1)) |
225 | return; |
226 | } |
227 | |
228 | if (cmd->stop_src == TRIG_COUNT && |
229 | async->scans_done >= cmd->stop_arg) |
230 | async->events |= COMEDI_CB_EOA; |
231 | } |
232 | } |
233 | |
234 | /* if command is still running, resubmit urb */ |
235 | if (!(async->events & COMEDI_CB_CANCEL_MASK)) { |
236 | urb->dev = comedi_to_usb_dev(dev); |
237 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
238 | if (ret < 0) { |
239 | dev_err(dev->class_dev, "urb resubmit failed (%d)\n" , |
240 | ret); |
241 | if (ret == -EL2NSYNC) |
242 | dev_err(dev->class_dev, |
243 | "buggy USB host controller or bug in IRQ handler\n" ); |
244 | async->events |= COMEDI_CB_ERROR; |
245 | } |
246 | } |
247 | } |
248 | |
249 | static void usbduxsigma_ai_urb_complete(struct urb *urb) |
250 | { |
251 | struct comedi_device *dev = urb->context; |
252 | struct usbduxsigma_private *devpriv = dev->private; |
253 | struct comedi_subdevice *s = dev->read_subdev; |
254 | struct comedi_async *async = s->async; |
255 | |
256 | /* exit if not running a command, do not resubmit urb */ |
257 | if (!devpriv->ai_cmd_running) |
258 | return; |
259 | |
260 | switch (urb->status) { |
261 | case 0: |
262 | /* copy the result in the transfer buffer */ |
263 | memcpy(devpriv->in_buf, urb->transfer_buffer, SIZEINBUF); |
264 | usbduxsigma_ai_handle_urb(dev, s, urb); |
265 | break; |
266 | |
267 | case -EILSEQ: |
268 | /* |
269 | * error in the ISOchronous data |
270 | * we don't copy the data into the transfer buffer |
271 | * and recycle the last data byte |
272 | */ |
273 | dev_dbg(dev->class_dev, "CRC error in ISO IN stream\n" ); |
274 | usbduxsigma_ai_handle_urb(dev, s, urb); |
275 | break; |
276 | |
277 | case -ECONNRESET: |
278 | case -ENOENT: |
279 | case -ESHUTDOWN: |
280 | case -ECONNABORTED: |
281 | /* happens after an unlink command */ |
282 | async->events |= COMEDI_CB_ERROR; |
283 | break; |
284 | |
285 | default: |
286 | /* a real error */ |
287 | dev_err(dev->class_dev, "non-zero urb status (%d)\n" , |
288 | urb->status); |
289 | async->events |= COMEDI_CB_ERROR; |
290 | break; |
291 | } |
292 | |
293 | /* |
294 | * comedi_handle_events() cannot be used in this driver. The (*cancel) |
295 | * operation would unlink the urb. |
296 | */ |
297 | if (async->events & COMEDI_CB_CANCEL_MASK) |
298 | usbduxsigma_ai_stop(dev, do_unlink: 0); |
299 | |
300 | comedi_event(dev, s); |
301 | } |
302 | |
303 | static void usbduxsigma_ao_stop(struct comedi_device *dev, int do_unlink) |
304 | { |
305 | struct usbduxsigma_private *devpriv = dev->private; |
306 | |
307 | if (do_unlink && devpriv->ao_urbs) |
308 | usbduxsigma_unlink_urbs(urbs: devpriv->ao_urbs, num_urbs: devpriv->n_ao_urbs); |
309 | |
310 | devpriv->ao_cmd_running = 0; |
311 | } |
312 | |
313 | static int usbduxsigma_ao_cancel(struct comedi_device *dev, |
314 | struct comedi_subdevice *s) |
315 | { |
316 | struct usbduxsigma_private *devpriv = dev->private; |
317 | |
318 | mutex_lock(&devpriv->mut); |
319 | /* unlink only if it is really running */ |
320 | usbduxsigma_ao_stop(dev, do_unlink: devpriv->ao_cmd_running); |
321 | mutex_unlock(lock: &devpriv->mut); |
322 | |
323 | return 0; |
324 | } |
325 | |
326 | static void usbduxsigma_ao_handle_urb(struct comedi_device *dev, |
327 | struct comedi_subdevice *s, |
328 | struct urb *urb) |
329 | { |
330 | struct usbduxsigma_private *devpriv = dev->private; |
331 | struct comedi_async *async = s->async; |
332 | struct comedi_cmd *cmd = &async->cmd; |
333 | u8 *datap; |
334 | int ret; |
335 | int i; |
336 | |
337 | devpriv->ao_counter--; |
338 | if (devpriv->ao_counter == 0) { |
339 | devpriv->ao_counter = devpriv->ao_timer; |
340 | |
341 | if (cmd->stop_src == TRIG_COUNT && |
342 | async->scans_done >= cmd->stop_arg) { |
343 | async->events |= COMEDI_CB_EOA; |
344 | return; |
345 | } |
346 | |
347 | /* transmit data to the USB bus */ |
348 | datap = urb->transfer_buffer; |
349 | *datap++ = cmd->chanlist_len; |
350 | for (i = 0; i < cmd->chanlist_len; i++) { |
351 | unsigned int chan = CR_CHAN(cmd->chanlist[i]); |
352 | unsigned short val; |
353 | |
354 | if (!comedi_buf_read_samples(s, data: &val, nsamples: 1)) { |
355 | dev_err(dev->class_dev, "buffer underflow\n" ); |
356 | async->events |= COMEDI_CB_OVERFLOW; |
357 | return; |
358 | } |
359 | |
360 | *datap++ = val; |
361 | *datap++ = chan; |
362 | s->readback[chan] = val; |
363 | } |
364 | } |
365 | |
366 | /* if command is still running, resubmit urb */ |
367 | if (!(async->events & COMEDI_CB_CANCEL_MASK)) { |
368 | urb->transfer_buffer_length = SIZEOUTBUF; |
369 | urb->dev = comedi_to_usb_dev(dev); |
370 | urb->status = 0; |
371 | urb->interval = 1; /* (u)frames */ |
372 | urb->number_of_packets = 1; |
373 | urb->iso_frame_desc[0].offset = 0; |
374 | urb->iso_frame_desc[0].length = SIZEOUTBUF; |
375 | urb->iso_frame_desc[0].status = 0; |
376 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
377 | if (ret < 0) { |
378 | dev_err(dev->class_dev, "urb resubmit failed (%d)\n" , |
379 | ret); |
380 | if (ret == -EL2NSYNC) |
381 | dev_err(dev->class_dev, |
382 | "buggy USB host controller or bug in IRQ handler\n" ); |
383 | async->events |= COMEDI_CB_ERROR; |
384 | } |
385 | } |
386 | } |
387 | |
388 | static void usbduxsigma_ao_urb_complete(struct urb *urb) |
389 | { |
390 | struct comedi_device *dev = urb->context; |
391 | struct usbduxsigma_private *devpriv = dev->private; |
392 | struct comedi_subdevice *s = dev->write_subdev; |
393 | struct comedi_async *async = s->async; |
394 | |
395 | /* exit if not running a command, do not resubmit urb */ |
396 | if (!devpriv->ao_cmd_running) |
397 | return; |
398 | |
399 | switch (urb->status) { |
400 | case 0: |
401 | usbduxsigma_ao_handle_urb(dev, s, urb); |
402 | break; |
403 | |
404 | case -ECONNRESET: |
405 | case -ENOENT: |
406 | case -ESHUTDOWN: |
407 | case -ECONNABORTED: |
408 | /* happens after an unlink command */ |
409 | async->events |= COMEDI_CB_ERROR; |
410 | break; |
411 | |
412 | default: |
413 | /* a real error */ |
414 | dev_err(dev->class_dev, "non-zero urb status (%d)\n" , |
415 | urb->status); |
416 | async->events |= COMEDI_CB_ERROR; |
417 | break; |
418 | } |
419 | |
420 | /* |
421 | * comedi_handle_events() cannot be used in this driver. The (*cancel) |
422 | * operation would unlink the urb. |
423 | */ |
424 | if (async->events & COMEDI_CB_CANCEL_MASK) |
425 | usbduxsigma_ao_stop(dev, do_unlink: 0); |
426 | |
427 | comedi_event(dev, s); |
428 | } |
429 | |
430 | static int usbduxsigma_submit_urbs(struct comedi_device *dev, |
431 | struct urb **urbs, int num_urbs, |
432 | int input_urb) |
433 | { |
434 | struct usb_device *usb = comedi_to_usb_dev(dev); |
435 | struct urb *urb; |
436 | int ret; |
437 | int i; |
438 | |
439 | /* Submit all URBs and start the transfer on the bus */ |
440 | for (i = 0; i < num_urbs; i++) { |
441 | urb = urbs[i]; |
442 | |
443 | /* in case of a resubmission after an unlink... */ |
444 | if (input_urb) |
445 | urb->interval = 1; |
446 | urb->context = dev; |
447 | urb->dev = usb; |
448 | urb->status = 0; |
449 | urb->transfer_flags = URB_ISO_ASAP; |
450 | |
451 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
452 | if (ret) |
453 | return ret; |
454 | } |
455 | return 0; |
456 | } |
457 | |
458 | static int usbduxsigma_chans_to_interval(int num_chan) |
459 | { |
460 | if (num_chan <= 2) |
461 | return 2; /* 4kHz */ |
462 | if (num_chan <= 8) |
463 | return 4; /* 2kHz */ |
464 | return 8; /* 1kHz */ |
465 | } |
466 | |
467 | static int usbduxsigma_ai_cmdtest(struct comedi_device *dev, |
468 | struct comedi_subdevice *s, |
469 | struct comedi_cmd *cmd) |
470 | { |
471 | struct usbduxsigma_private *devpriv = dev->private; |
472 | int high_speed = devpriv->high_speed; |
473 | int interval = usbduxsigma_chans_to_interval(num_chan: cmd->chanlist_len); |
474 | unsigned int tmp; |
475 | int err = 0; |
476 | |
477 | /* Step 1 : check if triggers are trivially valid */ |
478 | |
479 | err |= comedi_check_trigger_src(src: &cmd->start_src, TRIG_NOW | TRIG_INT); |
480 | err |= comedi_check_trigger_src(src: &cmd->scan_begin_src, TRIG_TIMER); |
481 | err |= comedi_check_trigger_src(src: &cmd->convert_src, TRIG_NOW); |
482 | err |= comedi_check_trigger_src(src: &cmd->scan_end_src, TRIG_COUNT); |
483 | err |= comedi_check_trigger_src(src: &cmd->stop_src, TRIG_COUNT | TRIG_NONE); |
484 | |
485 | if (err) |
486 | return 1; |
487 | |
488 | /* Step 2a : make sure trigger sources are unique */ |
489 | |
490 | err |= comedi_check_trigger_is_unique(src: cmd->start_src); |
491 | err |= comedi_check_trigger_is_unique(src: cmd->stop_src); |
492 | |
493 | /* Step 2b : and mutually compatible */ |
494 | |
495 | if (err) |
496 | return 2; |
497 | |
498 | /* Step 3: check if arguments are trivially valid */ |
499 | |
500 | err |= comedi_check_trigger_arg_is(arg: &cmd->start_arg, val: 0); |
501 | |
502 | if (high_speed) { |
503 | /* |
504 | * In high speed mode microframes are possible. |
505 | * However, during one microframe we can roughly |
506 | * sample two channels. Thus, the more channels |
507 | * are in the channel list the more time we need. |
508 | */ |
509 | err |= comedi_check_trigger_arg_min(arg: &cmd->scan_begin_arg, |
510 | val: (125000 * interval)); |
511 | } else { |
512 | /* full speed */ |
513 | /* 1kHz scans every USB frame */ |
514 | err |= comedi_check_trigger_arg_min(arg: &cmd->scan_begin_arg, |
515 | val: 1000000); |
516 | } |
517 | |
518 | err |= comedi_check_trigger_arg_is(arg: &cmd->scan_end_arg, |
519 | val: cmd->chanlist_len); |
520 | |
521 | if (cmd->stop_src == TRIG_COUNT) |
522 | err |= comedi_check_trigger_arg_min(arg: &cmd->stop_arg, val: 1); |
523 | else /* TRIG_NONE */ |
524 | err |= comedi_check_trigger_arg_is(arg: &cmd->stop_arg, val: 0); |
525 | |
526 | if (err) |
527 | return 3; |
528 | |
529 | /* Step 4: fix up any arguments */ |
530 | |
531 | tmp = rounddown(cmd->scan_begin_arg, high_speed ? 125000 : 1000000); |
532 | err |= comedi_check_trigger_arg_is(arg: &cmd->scan_begin_arg, val: tmp); |
533 | |
534 | if (err) |
535 | return 4; |
536 | |
537 | return 0; |
538 | } |
539 | |
540 | /* |
541 | * creates the ADC command for the MAX1271 |
542 | * range is the range value from comedi |
543 | */ |
544 | static void create_adc_command(unsigned int chan, |
545 | u8 *muxsg0, u8 *muxsg1) |
546 | { |
547 | if (chan < 8) |
548 | (*muxsg0) = (*muxsg0) | (1 << chan); |
549 | else if (chan < 16) |
550 | (*muxsg1) = (*muxsg1) | (1 << (chan - 8)); |
551 | } |
552 | |
553 | static int usbbuxsigma_send_cmd(struct comedi_device *dev, int cmd_type) |
554 | { |
555 | struct usb_device *usb = comedi_to_usb_dev(dev); |
556 | struct usbduxsigma_private *devpriv = dev->private; |
557 | int nsent; |
558 | |
559 | devpriv->dux_commands[0] = cmd_type; |
560 | |
561 | return usb_bulk_msg(usb_dev: usb, usb_sndbulkpipe(usb, 1), |
562 | data: devpriv->dux_commands, SIZEOFDUXBUFFER, |
563 | actual_length: &nsent, BULK_TIMEOUT); |
564 | } |
565 | |
566 | static int usbduxsigma_receive_cmd(struct comedi_device *dev, int command) |
567 | { |
568 | struct usb_device *usb = comedi_to_usb_dev(dev); |
569 | struct usbduxsigma_private *devpriv = dev->private; |
570 | int nrec; |
571 | int ret; |
572 | int i; |
573 | |
574 | for (i = 0; i < RETRIES; i++) { |
575 | ret = usb_bulk_msg(usb_dev: usb, usb_rcvbulkpipe(usb, 8), |
576 | data: devpriv->insn_buf, SIZEINSNBUF, |
577 | actual_length: &nrec, BULK_TIMEOUT); |
578 | if (ret < 0) |
579 | return ret; |
580 | |
581 | if (devpriv->insn_buf[0] == command) |
582 | return 0; |
583 | } |
584 | /* |
585 | * This is only reached if the data has been requested a |
586 | * couple of times and the command was not received. |
587 | */ |
588 | return -EFAULT; |
589 | } |
590 | |
591 | static int usbduxsigma_ai_inttrig(struct comedi_device *dev, |
592 | struct comedi_subdevice *s, |
593 | unsigned int trig_num) |
594 | { |
595 | struct usbduxsigma_private *devpriv = dev->private; |
596 | struct comedi_cmd *cmd = &s->async->cmd; |
597 | int ret; |
598 | |
599 | if (trig_num != cmd->start_arg) |
600 | return -EINVAL; |
601 | |
602 | mutex_lock(&devpriv->mut); |
603 | if (!devpriv->ai_cmd_running) { |
604 | devpriv->ai_cmd_running = 1; |
605 | ret = usbduxsigma_submit_urbs(dev, urbs: devpriv->ai_urbs, |
606 | num_urbs: devpriv->n_ai_urbs, input_urb: 1); |
607 | if (ret < 0) { |
608 | devpriv->ai_cmd_running = 0; |
609 | mutex_unlock(lock: &devpriv->mut); |
610 | return ret; |
611 | } |
612 | s->async->inttrig = NULL; |
613 | } |
614 | mutex_unlock(lock: &devpriv->mut); |
615 | |
616 | return 1; |
617 | } |
618 | |
619 | static int usbduxsigma_ai_cmd(struct comedi_device *dev, |
620 | struct comedi_subdevice *s) |
621 | { |
622 | struct usbduxsigma_private *devpriv = dev->private; |
623 | struct comedi_cmd *cmd = &s->async->cmd; |
624 | unsigned int len = cmd->chanlist_len; |
625 | u8 muxsg0 = 0; |
626 | u8 muxsg1 = 0; |
627 | u8 sysred = 0; |
628 | int ret; |
629 | int i; |
630 | |
631 | mutex_lock(&devpriv->mut); |
632 | |
633 | if (devpriv->high_speed) { |
634 | /* |
635 | * every 2 channels get a time window of 125us. Thus, if we |
636 | * sample all 16 channels we need 1ms. If we sample only one |
637 | * channel we need only 125us |
638 | */ |
639 | unsigned int interval = usbduxsigma_chans_to_interval(num_chan: len); |
640 | |
641 | devpriv->ai_interval = interval; |
642 | devpriv->ai_timer = cmd->scan_begin_arg / (125000 * interval); |
643 | } else { |
644 | /* interval always 1ms */ |
645 | devpriv->ai_interval = 1; |
646 | devpriv->ai_timer = cmd->scan_begin_arg / 1000000; |
647 | } |
648 | |
649 | for (i = 0; i < len; i++) { |
650 | unsigned int chan = CR_CHAN(cmd->chanlist[i]); |
651 | |
652 | create_adc_command(chan, muxsg0: &muxsg0, muxsg1: &muxsg1); |
653 | } |
654 | |
655 | devpriv->dux_commands[1] = devpriv->ai_interval; |
656 | devpriv->dux_commands[2] = len; /* num channels per time step */ |
657 | devpriv->dux_commands[3] = 0x12; /* CONFIG0 */ |
658 | devpriv->dux_commands[4] = 0x03; /* CONFIG1: 23kHz sample, delay 0us */ |
659 | devpriv->dux_commands[5] = 0x00; /* CONFIG3: diff. channels off */ |
660 | devpriv->dux_commands[6] = muxsg0; |
661 | devpriv->dux_commands[7] = muxsg1; |
662 | devpriv->dux_commands[8] = sysred; |
663 | |
664 | ret = usbbuxsigma_send_cmd(dev, USBBUXSIGMA_AD_CMD); |
665 | if (ret < 0) { |
666 | mutex_unlock(lock: &devpriv->mut); |
667 | return ret; |
668 | } |
669 | |
670 | devpriv->ai_counter = devpriv->ai_timer; |
671 | |
672 | if (cmd->start_src == TRIG_NOW) { |
673 | /* enable this acquisition operation */ |
674 | devpriv->ai_cmd_running = 1; |
675 | ret = usbduxsigma_submit_urbs(dev, urbs: devpriv->ai_urbs, |
676 | num_urbs: devpriv->n_ai_urbs, input_urb: 1); |
677 | if (ret < 0) { |
678 | devpriv->ai_cmd_running = 0; |
679 | mutex_unlock(lock: &devpriv->mut); |
680 | return ret; |
681 | } |
682 | s->async->inttrig = NULL; |
683 | } else { /* TRIG_INT */ |
684 | s->async->inttrig = usbduxsigma_ai_inttrig; |
685 | } |
686 | |
687 | mutex_unlock(lock: &devpriv->mut); |
688 | |
689 | return 0; |
690 | } |
691 | |
692 | static int usbduxsigma_ai_insn_read(struct comedi_device *dev, |
693 | struct comedi_subdevice *s, |
694 | struct comedi_insn *insn, |
695 | unsigned int *data) |
696 | { |
697 | struct usbduxsigma_private *devpriv = dev->private; |
698 | unsigned int chan = CR_CHAN(insn->chanspec); |
699 | u8 muxsg0 = 0; |
700 | u8 muxsg1 = 0; |
701 | u8 sysred = 0; |
702 | int ret; |
703 | int i; |
704 | |
705 | mutex_lock(&devpriv->mut); |
706 | if (devpriv->ai_cmd_running) { |
707 | mutex_unlock(lock: &devpriv->mut); |
708 | return -EBUSY; |
709 | } |
710 | |
711 | create_adc_command(chan, muxsg0: &muxsg0, muxsg1: &muxsg1); |
712 | |
713 | /* Mode 0 is used to get a single conversion on demand */ |
714 | devpriv->dux_commands[1] = 0x16; /* CONFIG0: chopper on */ |
715 | devpriv->dux_commands[2] = 0x80; /* CONFIG1: 2kHz sampling rate */ |
716 | devpriv->dux_commands[3] = 0x00; /* CONFIG3: diff. channels off */ |
717 | devpriv->dux_commands[4] = muxsg0; |
718 | devpriv->dux_commands[5] = muxsg1; |
719 | devpriv->dux_commands[6] = sysred; |
720 | |
721 | /* adc commands */ |
722 | ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD); |
723 | if (ret < 0) { |
724 | mutex_unlock(lock: &devpriv->mut); |
725 | return ret; |
726 | } |
727 | |
728 | for (i = 0; i < insn->n; i++) { |
729 | u32 val; |
730 | |
731 | ret = usbduxsigma_receive_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD); |
732 | if (ret < 0) { |
733 | mutex_unlock(lock: &devpriv->mut); |
734 | return ret; |
735 | } |
736 | |
737 | /* 32 bits big endian from the A/D converter */ |
738 | val = be32_to_cpu(get_unaligned((__be32 |
739 | *)(devpriv->insn_buf + 1))); |
740 | val &= 0x00ffffff; /* strip status byte */ |
741 | data[i] = comedi_offset_munge(s, val); |
742 | } |
743 | mutex_unlock(lock: &devpriv->mut); |
744 | |
745 | return insn->n; |
746 | } |
747 | |
748 | static int usbduxsigma_ao_insn_read(struct comedi_device *dev, |
749 | struct comedi_subdevice *s, |
750 | struct comedi_insn *insn, |
751 | unsigned int *data) |
752 | { |
753 | struct usbduxsigma_private *devpriv = dev->private; |
754 | int ret; |
755 | |
756 | mutex_lock(&devpriv->mut); |
757 | ret = comedi_readback_insn_read(dev, s, insn, data); |
758 | mutex_unlock(lock: &devpriv->mut); |
759 | |
760 | return ret; |
761 | } |
762 | |
763 | static int usbduxsigma_ao_insn_write(struct comedi_device *dev, |
764 | struct comedi_subdevice *s, |
765 | struct comedi_insn *insn, |
766 | unsigned int *data) |
767 | { |
768 | struct usbduxsigma_private *devpriv = dev->private; |
769 | unsigned int chan = CR_CHAN(insn->chanspec); |
770 | int ret; |
771 | int i; |
772 | |
773 | mutex_lock(&devpriv->mut); |
774 | if (devpriv->ao_cmd_running) { |
775 | mutex_unlock(lock: &devpriv->mut); |
776 | return -EBUSY; |
777 | } |
778 | |
779 | for (i = 0; i < insn->n; i++) { |
780 | devpriv->dux_commands[1] = 1; /* num channels */ |
781 | devpriv->dux_commands[2] = data[i]; /* value */ |
782 | devpriv->dux_commands[3] = chan; /* channel number */ |
783 | ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_DA_CMD); |
784 | if (ret < 0) { |
785 | mutex_unlock(lock: &devpriv->mut); |
786 | return ret; |
787 | } |
788 | s->readback[chan] = data[i]; |
789 | } |
790 | mutex_unlock(lock: &devpriv->mut); |
791 | |
792 | return insn->n; |
793 | } |
794 | |
795 | static int usbduxsigma_ao_inttrig(struct comedi_device *dev, |
796 | struct comedi_subdevice *s, |
797 | unsigned int trig_num) |
798 | { |
799 | struct usbduxsigma_private *devpriv = dev->private; |
800 | struct comedi_cmd *cmd = &s->async->cmd; |
801 | int ret; |
802 | |
803 | if (trig_num != cmd->start_arg) |
804 | return -EINVAL; |
805 | |
806 | mutex_lock(&devpriv->mut); |
807 | if (!devpriv->ao_cmd_running) { |
808 | devpriv->ao_cmd_running = 1; |
809 | ret = usbduxsigma_submit_urbs(dev, urbs: devpriv->ao_urbs, |
810 | num_urbs: devpriv->n_ao_urbs, input_urb: 0); |
811 | if (ret < 0) { |
812 | devpriv->ao_cmd_running = 0; |
813 | mutex_unlock(lock: &devpriv->mut); |
814 | return ret; |
815 | } |
816 | s->async->inttrig = NULL; |
817 | } |
818 | mutex_unlock(lock: &devpriv->mut); |
819 | |
820 | return 1; |
821 | } |
822 | |
823 | static int usbduxsigma_ao_cmdtest(struct comedi_device *dev, |
824 | struct comedi_subdevice *s, |
825 | struct comedi_cmd *cmd) |
826 | { |
827 | struct usbduxsigma_private *devpriv = dev->private; |
828 | unsigned int tmp; |
829 | int err = 0; |
830 | |
831 | /* Step 1 : check if triggers are trivially valid */ |
832 | |
833 | err |= comedi_check_trigger_src(src: &cmd->start_src, TRIG_NOW | TRIG_INT); |
834 | |
835 | /* |
836 | * For now, always use "scan" timing with all channels updated at once |
837 | * (cmd->scan_begin_src == TRIG_TIMER, cmd->convert_src == TRIG_NOW). |
838 | * |
839 | * In a future version, "convert" timing with channels updated |
840 | * indivually may be supported in high speed mode |
841 | * (cmd->scan_begin_src == TRIG_FOLLOW, cmd->convert_src == TRIG_TIMER). |
842 | */ |
843 | err |= comedi_check_trigger_src(src: &cmd->scan_begin_src, TRIG_TIMER); |
844 | err |= comedi_check_trigger_src(src: &cmd->convert_src, TRIG_NOW); |
845 | err |= comedi_check_trigger_src(src: &cmd->scan_end_src, TRIG_COUNT); |
846 | err |= comedi_check_trigger_src(src: &cmd->stop_src, TRIG_COUNT | TRIG_NONE); |
847 | |
848 | if (err) { |
849 | mutex_unlock(lock: &devpriv->mut); |
850 | return 1; |
851 | } |
852 | |
853 | /* Step 2a : make sure trigger sources are unique */ |
854 | |
855 | err |= comedi_check_trigger_is_unique(src: cmd->start_src); |
856 | err |= comedi_check_trigger_is_unique(src: cmd->stop_src); |
857 | |
858 | /* Step 2b : and mutually compatible */ |
859 | |
860 | if (err) |
861 | return 2; |
862 | |
863 | /* Step 3: check if arguments are trivially valid */ |
864 | |
865 | err |= comedi_check_trigger_arg_is(arg: &cmd->start_arg, val: 0); |
866 | |
867 | err |= comedi_check_trigger_arg_min(arg: &cmd->scan_begin_arg, val: 1000000); |
868 | |
869 | err |= comedi_check_trigger_arg_is(arg: &cmd->scan_end_arg, |
870 | val: cmd->chanlist_len); |
871 | |
872 | if (cmd->stop_src == TRIG_COUNT) |
873 | err |= comedi_check_trigger_arg_min(arg: &cmd->stop_arg, val: 1); |
874 | else /* TRIG_NONE */ |
875 | err |= comedi_check_trigger_arg_is(arg: &cmd->stop_arg, val: 0); |
876 | |
877 | if (err) |
878 | return 3; |
879 | |
880 | /* Step 4: fix up any arguments */ |
881 | |
882 | tmp = rounddown(cmd->scan_begin_arg, 1000000); |
883 | err |= comedi_check_trigger_arg_is(arg: &cmd->scan_begin_arg, val: tmp); |
884 | |
885 | if (err) |
886 | return 4; |
887 | |
888 | return 0; |
889 | } |
890 | |
891 | static int usbduxsigma_ao_cmd(struct comedi_device *dev, |
892 | struct comedi_subdevice *s) |
893 | { |
894 | struct usbduxsigma_private *devpriv = dev->private; |
895 | struct comedi_cmd *cmd = &s->async->cmd; |
896 | int ret; |
897 | |
898 | mutex_lock(&devpriv->mut); |
899 | |
900 | /* |
901 | * For now, only "scan" timing is supported. A future version may |
902 | * support "convert" timing in high speed mode. |
903 | * |
904 | * Timing of the scan: every 1ms all channels updated at once. |
905 | */ |
906 | devpriv->ao_timer = cmd->scan_begin_arg / 1000000; |
907 | |
908 | devpriv->ao_counter = devpriv->ao_timer; |
909 | |
910 | if (cmd->start_src == TRIG_NOW) { |
911 | /* enable this acquisition operation */ |
912 | devpriv->ao_cmd_running = 1; |
913 | ret = usbduxsigma_submit_urbs(dev, urbs: devpriv->ao_urbs, |
914 | num_urbs: devpriv->n_ao_urbs, input_urb: 0); |
915 | if (ret < 0) { |
916 | devpriv->ao_cmd_running = 0; |
917 | mutex_unlock(lock: &devpriv->mut); |
918 | return ret; |
919 | } |
920 | s->async->inttrig = NULL; |
921 | } else { /* TRIG_INT */ |
922 | s->async->inttrig = usbduxsigma_ao_inttrig; |
923 | } |
924 | |
925 | mutex_unlock(lock: &devpriv->mut); |
926 | |
927 | return 0; |
928 | } |
929 | |
930 | static int usbduxsigma_dio_insn_config(struct comedi_device *dev, |
931 | struct comedi_subdevice *s, |
932 | struct comedi_insn *insn, |
933 | unsigned int *data) |
934 | { |
935 | int ret; |
936 | |
937 | ret = comedi_dio_insn_config(dev, s, insn, data, mask: 0); |
938 | if (ret) |
939 | return ret; |
940 | |
941 | /* |
942 | * We don't tell the firmware here as it would take 8 frames |
943 | * to submit the information. We do it in the (*insn_bits). |
944 | */ |
945 | return insn->n; |
946 | } |
947 | |
948 | static int usbduxsigma_dio_insn_bits(struct comedi_device *dev, |
949 | struct comedi_subdevice *s, |
950 | struct comedi_insn *insn, |
951 | unsigned int *data) |
952 | { |
953 | struct usbduxsigma_private *devpriv = dev->private; |
954 | int ret; |
955 | |
956 | mutex_lock(&devpriv->mut); |
957 | |
958 | comedi_dio_update_state(s, data); |
959 | |
960 | /* Always update the hardware. See the (*insn_config). */ |
961 | devpriv->dux_commands[1] = s->io_bits & 0xff; |
962 | devpriv->dux_commands[4] = s->state & 0xff; |
963 | devpriv->dux_commands[2] = (s->io_bits >> 8) & 0xff; |
964 | devpriv->dux_commands[5] = (s->state >> 8) & 0xff; |
965 | devpriv->dux_commands[3] = (s->io_bits >> 16) & 0xff; |
966 | devpriv->dux_commands[6] = (s->state >> 16) & 0xff; |
967 | |
968 | ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_DIO_BITS_CMD); |
969 | if (ret < 0) |
970 | goto done; |
971 | ret = usbduxsigma_receive_cmd(dev, USBDUXSIGMA_DIO_BITS_CMD); |
972 | if (ret < 0) |
973 | goto done; |
974 | |
975 | s->state = devpriv->insn_buf[1] | |
976 | (devpriv->insn_buf[2] << 8) | |
977 | (devpriv->insn_buf[3] << 16); |
978 | |
979 | data[1] = s->state; |
980 | ret = insn->n; |
981 | |
982 | done: |
983 | mutex_unlock(lock: &devpriv->mut); |
984 | |
985 | return ret; |
986 | } |
987 | |
988 | static void usbduxsigma_pwm_stop(struct comedi_device *dev, int do_unlink) |
989 | { |
990 | struct usbduxsigma_private *devpriv = dev->private; |
991 | |
992 | if (do_unlink) { |
993 | if (devpriv->pwm_urb) |
994 | usb_kill_urb(urb: devpriv->pwm_urb); |
995 | } |
996 | |
997 | devpriv->pwm_cmd_running = 0; |
998 | } |
999 | |
1000 | static int usbduxsigma_pwm_cancel(struct comedi_device *dev, |
1001 | struct comedi_subdevice *s) |
1002 | { |
1003 | struct usbduxsigma_private *devpriv = dev->private; |
1004 | |
1005 | /* unlink only if it is really running */ |
1006 | usbduxsigma_pwm_stop(dev, do_unlink: devpriv->pwm_cmd_running); |
1007 | |
1008 | return usbbuxsigma_send_cmd(dev, USBDUXSIGMA_PWM_OFF_CMD); |
1009 | } |
1010 | |
1011 | static void usbduxsigma_pwm_urb_complete(struct urb *urb) |
1012 | { |
1013 | struct comedi_device *dev = urb->context; |
1014 | struct usbduxsigma_private *devpriv = dev->private; |
1015 | int ret; |
1016 | |
1017 | switch (urb->status) { |
1018 | case 0: |
1019 | /* success */ |
1020 | break; |
1021 | |
1022 | case -ECONNRESET: |
1023 | case -ENOENT: |
1024 | case -ESHUTDOWN: |
1025 | case -ECONNABORTED: |
1026 | /* happens after an unlink command */ |
1027 | if (devpriv->pwm_cmd_running) |
1028 | usbduxsigma_pwm_stop(dev, do_unlink: 0); /* w/o unlink */ |
1029 | return; |
1030 | |
1031 | default: |
1032 | /* a real error */ |
1033 | if (devpriv->pwm_cmd_running) { |
1034 | dev_err(dev->class_dev, "non-zero urb status (%d)\n" , |
1035 | urb->status); |
1036 | usbduxsigma_pwm_stop(dev, do_unlink: 0); /* w/o unlink */ |
1037 | } |
1038 | return; |
1039 | } |
1040 | |
1041 | if (!devpriv->pwm_cmd_running) |
1042 | return; |
1043 | |
1044 | urb->transfer_buffer_length = devpriv->pwm_buf_sz; |
1045 | urb->dev = comedi_to_usb_dev(dev); |
1046 | urb->status = 0; |
1047 | ret = usb_submit_urb(urb, GFP_ATOMIC); |
1048 | if (ret < 0) { |
1049 | dev_err(dev->class_dev, "urb resubmit failed (%d)\n" , ret); |
1050 | if (ret == -EL2NSYNC) |
1051 | dev_err(dev->class_dev, |
1052 | "buggy USB host controller or bug in IRQ handler\n" ); |
1053 | usbduxsigma_pwm_stop(dev, do_unlink: 0); /* w/o unlink */ |
1054 | } |
1055 | } |
1056 | |
1057 | static int usbduxsigma_submit_pwm_urb(struct comedi_device *dev) |
1058 | { |
1059 | struct usb_device *usb = comedi_to_usb_dev(dev); |
1060 | struct usbduxsigma_private *devpriv = dev->private; |
1061 | struct urb *urb = devpriv->pwm_urb; |
1062 | |
1063 | /* in case of a resubmission after an unlink... */ |
1064 | usb_fill_bulk_urb(urb, dev: usb, usb_sndbulkpipe(usb, 4), |
1065 | transfer_buffer: urb->transfer_buffer, buffer_length: devpriv->pwm_buf_sz, |
1066 | complete_fn: usbduxsigma_pwm_urb_complete, context: dev); |
1067 | |
1068 | return usb_submit_urb(urb, GFP_ATOMIC); |
1069 | } |
1070 | |
1071 | static int usbduxsigma_pwm_period(struct comedi_device *dev, |
1072 | struct comedi_subdevice *s, |
1073 | unsigned int period) |
1074 | { |
1075 | struct usbduxsigma_private *devpriv = dev->private; |
1076 | int fx2delay; |
1077 | |
1078 | if (period < MIN_PWM_PERIOD) |
1079 | return -EAGAIN; |
1080 | |
1081 | fx2delay = (period / (6 * 512 * 1000 / 33)) - 6; |
1082 | if (fx2delay > 255) |
1083 | return -EAGAIN; |
1084 | |
1085 | devpriv->pwm_delay = fx2delay; |
1086 | devpriv->pwm_period = period; |
1087 | return 0; |
1088 | } |
1089 | |
1090 | static int usbduxsigma_pwm_start(struct comedi_device *dev, |
1091 | struct comedi_subdevice *s) |
1092 | { |
1093 | struct usbduxsigma_private *devpriv = dev->private; |
1094 | int ret; |
1095 | |
1096 | if (devpriv->pwm_cmd_running) |
1097 | return 0; |
1098 | |
1099 | devpriv->dux_commands[1] = devpriv->pwm_delay; |
1100 | ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_PWM_ON_CMD); |
1101 | if (ret < 0) |
1102 | return ret; |
1103 | |
1104 | memset(devpriv->pwm_urb->transfer_buffer, 0, devpriv->pwm_buf_sz); |
1105 | |
1106 | devpriv->pwm_cmd_running = 1; |
1107 | ret = usbduxsigma_submit_pwm_urb(dev); |
1108 | if (ret < 0) { |
1109 | devpriv->pwm_cmd_running = 0; |
1110 | return ret; |
1111 | } |
1112 | |
1113 | return 0; |
1114 | } |
1115 | |
1116 | static void usbduxsigma_pwm_pattern(struct comedi_device *dev, |
1117 | struct comedi_subdevice *s, |
1118 | unsigned int chan, |
1119 | unsigned int value, |
1120 | unsigned int sign) |
1121 | { |
1122 | struct usbduxsigma_private *devpriv = dev->private; |
1123 | char pwm_mask = (1 << chan); /* DIO bit for the PWM data */ |
1124 | char sgn_mask = (16 << chan); /* DIO bit for the sign */ |
1125 | char *buf = (char *)(devpriv->pwm_urb->transfer_buffer); |
1126 | int szbuf = devpriv->pwm_buf_sz; |
1127 | int i; |
1128 | |
1129 | for (i = 0; i < szbuf; i++) { |
1130 | char c = *buf; |
1131 | |
1132 | c &= ~pwm_mask; |
1133 | if (i < value) |
1134 | c |= pwm_mask; |
1135 | if (!sign) |
1136 | c &= ~sgn_mask; |
1137 | else |
1138 | c |= sgn_mask; |
1139 | *buf++ = c; |
1140 | } |
1141 | } |
1142 | |
1143 | static int usbduxsigma_pwm_write(struct comedi_device *dev, |
1144 | struct comedi_subdevice *s, |
1145 | struct comedi_insn *insn, |
1146 | unsigned int *data) |
1147 | { |
1148 | unsigned int chan = CR_CHAN(insn->chanspec); |
1149 | |
1150 | /* |
1151 | * It doesn't make sense to support more than one value here |
1152 | * because it would just overwrite the PWM buffer. |
1153 | */ |
1154 | if (insn->n != 1) |
1155 | return -EINVAL; |
1156 | |
1157 | /* |
1158 | * The sign is set via a special INSN only, this gives us 8 bits |
1159 | * for normal operation, sign is 0 by default. |
1160 | */ |
1161 | usbduxsigma_pwm_pattern(dev, s, chan, value: data[0], sign: 0); |
1162 | |
1163 | return insn->n; |
1164 | } |
1165 | |
1166 | static int usbduxsigma_pwm_config(struct comedi_device *dev, |
1167 | struct comedi_subdevice *s, |
1168 | struct comedi_insn *insn, |
1169 | unsigned int *data) |
1170 | { |
1171 | struct usbduxsigma_private *devpriv = dev->private; |
1172 | unsigned int chan = CR_CHAN(insn->chanspec); |
1173 | |
1174 | switch (data[0]) { |
1175 | case INSN_CONFIG_ARM: |
1176 | /* |
1177 | * if not zero the PWM is limited to a certain time which is |
1178 | * not supported here |
1179 | */ |
1180 | if (data[1] != 0) |
1181 | return -EINVAL; |
1182 | return usbduxsigma_pwm_start(dev, s); |
1183 | case INSN_CONFIG_DISARM: |
1184 | return usbduxsigma_pwm_cancel(dev, s); |
1185 | case INSN_CONFIG_GET_PWM_STATUS: |
1186 | data[1] = devpriv->pwm_cmd_running; |
1187 | return 0; |
1188 | case INSN_CONFIG_PWM_SET_PERIOD: |
1189 | return usbduxsigma_pwm_period(dev, s, period: data[1]); |
1190 | case INSN_CONFIG_PWM_GET_PERIOD: |
1191 | data[1] = devpriv->pwm_period; |
1192 | return 0; |
1193 | case INSN_CONFIG_PWM_SET_H_BRIDGE: |
1194 | /* |
1195 | * data[1] = value |
1196 | * data[2] = sign (for a relay) |
1197 | */ |
1198 | usbduxsigma_pwm_pattern(dev, s, chan, value: data[1], sign: (data[2] != 0)); |
1199 | return 0; |
1200 | case INSN_CONFIG_PWM_GET_H_BRIDGE: |
1201 | /* values are not kept in this driver, nothing to return */ |
1202 | return -EINVAL; |
1203 | } |
1204 | return -EINVAL; |
1205 | } |
1206 | |
1207 | static int usbduxsigma_getstatusinfo(struct comedi_device *dev, int chan) |
1208 | { |
1209 | struct comedi_subdevice *s = dev->read_subdev; |
1210 | struct usbduxsigma_private *devpriv = dev->private; |
1211 | u8 sysred; |
1212 | u32 val; |
1213 | int ret; |
1214 | |
1215 | switch (chan) { |
1216 | default: |
1217 | case 0: |
1218 | sysred = 0; /* ADC zero */ |
1219 | break; |
1220 | case 1: |
1221 | sysred = 1; /* ADC offset */ |
1222 | break; |
1223 | case 2: |
1224 | sysred = 4; /* VCC */ |
1225 | break; |
1226 | case 3: |
1227 | sysred = 8; /* temperature */ |
1228 | break; |
1229 | case 4: |
1230 | sysred = 16; /* gain */ |
1231 | break; |
1232 | case 5: |
1233 | sysred = 32; /* ref */ |
1234 | break; |
1235 | } |
1236 | |
1237 | devpriv->dux_commands[1] = 0x12; /* CONFIG0 */ |
1238 | devpriv->dux_commands[2] = 0x80; /* CONFIG1: 2kHz sampling rate */ |
1239 | devpriv->dux_commands[3] = 0x00; /* CONFIG3: diff. channels off */ |
1240 | devpriv->dux_commands[4] = 0; |
1241 | devpriv->dux_commands[5] = 0; |
1242 | devpriv->dux_commands[6] = sysred; |
1243 | ret = usbbuxsigma_send_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD); |
1244 | if (ret < 0) |
1245 | return ret; |
1246 | |
1247 | ret = usbduxsigma_receive_cmd(dev, USBDUXSIGMA_SINGLE_AD_CMD); |
1248 | if (ret < 0) |
1249 | return ret; |
1250 | |
1251 | /* 32 bits big endian from the A/D converter */ |
1252 | val = be32_to_cpu(get_unaligned((__be32 *)(devpriv->insn_buf + 1))); |
1253 | val &= 0x00ffffff; /* strip status byte */ |
1254 | |
1255 | return (int)comedi_offset_munge(s, val); |
1256 | } |
1257 | |
1258 | static int usbduxsigma_firmware_upload(struct comedi_device *dev, |
1259 | const u8 *data, size_t size, |
1260 | unsigned long context) |
1261 | { |
1262 | struct usb_device *usb = comedi_to_usb_dev(dev); |
1263 | u8 *buf; |
1264 | u8 *tmp; |
1265 | int ret; |
1266 | |
1267 | if (!data) |
1268 | return 0; |
1269 | |
1270 | if (size > FIRMWARE_MAX_LEN) { |
1271 | dev_err(dev->class_dev, "firmware binary too large for FX2\n" ); |
1272 | return -ENOMEM; |
1273 | } |
1274 | |
1275 | /* we generate a local buffer for the firmware */ |
1276 | buf = kmemdup(p: data, size, GFP_KERNEL); |
1277 | if (!buf) |
1278 | return -ENOMEM; |
1279 | |
1280 | /* we need a malloc'ed buffer for usb_control_msg() */ |
1281 | tmp = kmalloc(size: 1, GFP_KERNEL); |
1282 | if (!tmp) { |
1283 | kfree(objp: buf); |
1284 | return -ENOMEM; |
1285 | } |
1286 | |
1287 | /* stop the current firmware on the device */ |
1288 | *tmp = 1; /* 7f92 to one */ |
1289 | ret = usb_control_msg(dev: usb, usb_sndctrlpipe(usb, 0), |
1290 | USBDUXSUB_FIRMWARE, |
1291 | VENDOR_DIR_OUT, |
1292 | USBDUXSUB_CPUCS, index: 0x0000, |
1293 | data: tmp, size: 1, |
1294 | BULK_TIMEOUT); |
1295 | if (ret < 0) { |
1296 | dev_err(dev->class_dev, "can not stop firmware\n" ); |
1297 | goto done; |
1298 | } |
1299 | |
1300 | /* upload the new firmware to the device */ |
1301 | ret = usb_control_msg(dev: usb, usb_sndctrlpipe(usb, 0), |
1302 | USBDUXSUB_FIRMWARE, |
1303 | VENDOR_DIR_OUT, |
1304 | value: 0, index: 0x0000, |
1305 | data: buf, size, |
1306 | BULK_TIMEOUT); |
1307 | if (ret < 0) { |
1308 | dev_err(dev->class_dev, "firmware upload failed\n" ); |
1309 | goto done; |
1310 | } |
1311 | |
1312 | /* start the new firmware on the device */ |
1313 | *tmp = 0; /* 7f92 to zero */ |
1314 | ret = usb_control_msg(dev: usb, usb_sndctrlpipe(usb, 0), |
1315 | USBDUXSUB_FIRMWARE, |
1316 | VENDOR_DIR_OUT, |
1317 | USBDUXSUB_CPUCS, index: 0x0000, |
1318 | data: tmp, size: 1, |
1319 | BULK_TIMEOUT); |
1320 | if (ret < 0) |
1321 | dev_err(dev->class_dev, "can not start firmware\n" ); |
1322 | |
1323 | done: |
1324 | kfree(objp: tmp); |
1325 | kfree(objp: buf); |
1326 | return ret; |
1327 | } |
1328 | |
1329 | static int usbduxsigma_alloc_usb_buffers(struct comedi_device *dev) |
1330 | { |
1331 | struct usb_device *usb = comedi_to_usb_dev(dev); |
1332 | struct usbduxsigma_private *devpriv = dev->private; |
1333 | struct urb *urb; |
1334 | int i; |
1335 | |
1336 | devpriv->dux_commands = kzalloc(SIZEOFDUXBUFFER, GFP_KERNEL); |
1337 | devpriv->in_buf = kzalloc(SIZEINBUF, GFP_KERNEL); |
1338 | devpriv->insn_buf = kzalloc(SIZEINSNBUF, GFP_KERNEL); |
1339 | devpriv->ai_urbs = kcalloc(n: devpriv->n_ai_urbs, size: sizeof(urb), GFP_KERNEL); |
1340 | devpriv->ao_urbs = kcalloc(n: devpriv->n_ao_urbs, size: sizeof(urb), GFP_KERNEL); |
1341 | if (!devpriv->dux_commands || !devpriv->in_buf || !devpriv->insn_buf || |
1342 | !devpriv->ai_urbs || !devpriv->ao_urbs) |
1343 | return -ENOMEM; |
1344 | |
1345 | for (i = 0; i < devpriv->n_ai_urbs; i++) { |
1346 | /* one frame: 1ms */ |
1347 | urb = usb_alloc_urb(iso_packets: 1, GFP_KERNEL); |
1348 | if (!urb) |
1349 | return -ENOMEM; |
1350 | devpriv->ai_urbs[i] = urb; |
1351 | urb->dev = usb; |
1352 | /* will be filled later with a pointer to the comedi-device */ |
1353 | /* and ONLY then the urb should be submitted */ |
1354 | urb->context = NULL; |
1355 | urb->pipe = usb_rcvisocpipe(usb, 6); |
1356 | urb->transfer_flags = URB_ISO_ASAP; |
1357 | urb->transfer_buffer = kzalloc(SIZEINBUF, GFP_KERNEL); |
1358 | if (!urb->transfer_buffer) |
1359 | return -ENOMEM; |
1360 | urb->complete = usbduxsigma_ai_urb_complete; |
1361 | urb->number_of_packets = 1; |
1362 | urb->transfer_buffer_length = SIZEINBUF; |
1363 | urb->iso_frame_desc[0].offset = 0; |
1364 | urb->iso_frame_desc[0].length = SIZEINBUF; |
1365 | } |
1366 | |
1367 | for (i = 0; i < devpriv->n_ao_urbs; i++) { |
1368 | /* one frame: 1ms */ |
1369 | urb = usb_alloc_urb(iso_packets: 1, GFP_KERNEL); |
1370 | if (!urb) |
1371 | return -ENOMEM; |
1372 | devpriv->ao_urbs[i] = urb; |
1373 | urb->dev = usb; |
1374 | /* will be filled later with a pointer to the comedi-device */ |
1375 | /* and ONLY then the urb should be submitted */ |
1376 | urb->context = NULL; |
1377 | urb->pipe = usb_sndisocpipe(usb, 2); |
1378 | urb->transfer_flags = URB_ISO_ASAP; |
1379 | urb->transfer_buffer = kzalloc(SIZEOUTBUF, GFP_KERNEL); |
1380 | if (!urb->transfer_buffer) |
1381 | return -ENOMEM; |
1382 | urb->complete = usbduxsigma_ao_urb_complete; |
1383 | urb->number_of_packets = 1; |
1384 | urb->transfer_buffer_length = SIZEOUTBUF; |
1385 | urb->iso_frame_desc[0].offset = 0; |
1386 | urb->iso_frame_desc[0].length = SIZEOUTBUF; |
1387 | urb->interval = 1; /* (u)frames */ |
1388 | } |
1389 | |
1390 | if (devpriv->pwm_buf_sz) { |
1391 | urb = usb_alloc_urb(iso_packets: 0, GFP_KERNEL); |
1392 | if (!urb) |
1393 | return -ENOMEM; |
1394 | devpriv->pwm_urb = urb; |
1395 | |
1396 | urb->transfer_buffer = kzalloc(size: devpriv->pwm_buf_sz, |
1397 | GFP_KERNEL); |
1398 | if (!urb->transfer_buffer) |
1399 | return -ENOMEM; |
1400 | } |
1401 | |
1402 | return 0; |
1403 | } |
1404 | |
1405 | static void usbduxsigma_free_usb_buffers(struct comedi_device *dev) |
1406 | { |
1407 | struct usbduxsigma_private *devpriv = dev->private; |
1408 | struct urb *urb; |
1409 | int i; |
1410 | |
1411 | urb = devpriv->pwm_urb; |
1412 | if (urb) { |
1413 | kfree(objp: urb->transfer_buffer); |
1414 | usb_free_urb(urb); |
1415 | } |
1416 | if (devpriv->ao_urbs) { |
1417 | for (i = 0; i < devpriv->n_ao_urbs; i++) { |
1418 | urb = devpriv->ao_urbs[i]; |
1419 | if (urb) { |
1420 | kfree(objp: urb->transfer_buffer); |
1421 | usb_free_urb(urb); |
1422 | } |
1423 | } |
1424 | kfree(objp: devpriv->ao_urbs); |
1425 | } |
1426 | if (devpriv->ai_urbs) { |
1427 | for (i = 0; i < devpriv->n_ai_urbs; i++) { |
1428 | urb = devpriv->ai_urbs[i]; |
1429 | if (urb) { |
1430 | kfree(objp: urb->transfer_buffer); |
1431 | usb_free_urb(urb); |
1432 | } |
1433 | } |
1434 | kfree(objp: devpriv->ai_urbs); |
1435 | } |
1436 | kfree(objp: devpriv->insn_buf); |
1437 | kfree(objp: devpriv->in_buf); |
1438 | kfree(objp: devpriv->dux_commands); |
1439 | } |
1440 | |
1441 | static int usbduxsigma_auto_attach(struct comedi_device *dev, |
1442 | unsigned long context_unused) |
1443 | { |
1444 | struct usb_interface *intf = comedi_to_usb_interface(dev); |
1445 | struct usb_device *usb = comedi_to_usb_dev(dev); |
1446 | struct usbduxsigma_private *devpriv; |
1447 | struct comedi_subdevice *s; |
1448 | int offset; |
1449 | int ret; |
1450 | |
1451 | devpriv = comedi_alloc_devpriv(dev, size: sizeof(*devpriv)); |
1452 | if (!devpriv) |
1453 | return -ENOMEM; |
1454 | |
1455 | mutex_init(&devpriv->mut); |
1456 | |
1457 | usb_set_intfdata(intf, data: devpriv); |
1458 | |
1459 | devpriv->high_speed = (usb->speed == USB_SPEED_HIGH); |
1460 | if (devpriv->high_speed) { |
1461 | devpriv->n_ai_urbs = NUMOFINBUFFERSHIGH; |
1462 | devpriv->n_ao_urbs = NUMOFOUTBUFFERSHIGH; |
1463 | devpriv->pwm_buf_sz = 512; |
1464 | } else { |
1465 | devpriv->n_ai_urbs = NUMOFINBUFFERSFULL; |
1466 | devpriv->n_ao_urbs = NUMOFOUTBUFFERSFULL; |
1467 | } |
1468 | |
1469 | ret = usbduxsigma_alloc_usb_buffers(dev); |
1470 | if (ret) |
1471 | return ret; |
1472 | |
1473 | /* setting to alternate setting 3: enabling iso ep and bulk ep. */ |
1474 | ret = usb_set_interface(dev: usb, ifnum: intf->altsetting->desc.bInterfaceNumber, |
1475 | alternate: 3); |
1476 | if (ret < 0) { |
1477 | dev_err(dev->class_dev, |
1478 | "could not set alternate setting 3 in high speed\n" ); |
1479 | return ret; |
1480 | } |
1481 | |
1482 | ret = comedi_load_firmware(dev, hw_dev: &usb->dev, FIRMWARE, |
1483 | cb: usbduxsigma_firmware_upload, context: 0); |
1484 | if (ret) |
1485 | return ret; |
1486 | |
1487 | ret = comedi_alloc_subdevices(dev, num_subdevices: (devpriv->high_speed) ? 4 : 3); |
1488 | if (ret) |
1489 | return ret; |
1490 | |
1491 | /* Analog Input subdevice */ |
1492 | s = &dev->subdevices[0]; |
1493 | dev->read_subdev = s; |
1494 | s->type = COMEDI_SUBD_AI; |
1495 | s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_CMD_READ | SDF_LSAMPL; |
1496 | s->n_chan = NUMCHANNELS; |
1497 | s->len_chanlist = NUMCHANNELS; |
1498 | s->maxdata = 0x00ffffff; |
1499 | s->range_table = &usbduxsigma_ai_range; |
1500 | s->insn_read = usbduxsigma_ai_insn_read; |
1501 | s->do_cmdtest = usbduxsigma_ai_cmdtest; |
1502 | s->do_cmd = usbduxsigma_ai_cmd; |
1503 | s->cancel = usbduxsigma_ai_cancel; |
1504 | |
1505 | /* Analog Output subdevice */ |
1506 | s = &dev->subdevices[1]; |
1507 | dev->write_subdev = s; |
1508 | s->type = COMEDI_SUBD_AO; |
1509 | s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_CMD_WRITE; |
1510 | s->n_chan = 4; |
1511 | s->len_chanlist = s->n_chan; |
1512 | s->maxdata = 0x00ff; |
1513 | s->range_table = &range_unipolar2_5; |
1514 | s->insn_write = usbduxsigma_ao_insn_write; |
1515 | s->insn_read = usbduxsigma_ao_insn_read; |
1516 | s->do_cmdtest = usbduxsigma_ao_cmdtest; |
1517 | s->do_cmd = usbduxsigma_ao_cmd; |
1518 | s->cancel = usbduxsigma_ao_cancel; |
1519 | |
1520 | ret = comedi_alloc_subdev_readback(s); |
1521 | if (ret) |
1522 | return ret; |
1523 | |
1524 | /* Digital I/O subdevice */ |
1525 | s = &dev->subdevices[2]; |
1526 | s->type = COMEDI_SUBD_DIO; |
1527 | s->subdev_flags = SDF_READABLE | SDF_WRITABLE; |
1528 | s->n_chan = 24; |
1529 | s->maxdata = 1; |
1530 | s->range_table = &range_digital; |
1531 | s->insn_bits = usbduxsigma_dio_insn_bits; |
1532 | s->insn_config = usbduxsigma_dio_insn_config; |
1533 | |
1534 | if (devpriv->high_speed) { |
1535 | /* Timer / pwm subdevice */ |
1536 | s = &dev->subdevices[3]; |
1537 | s->type = COMEDI_SUBD_PWM; |
1538 | s->subdev_flags = SDF_WRITABLE | SDF_PWM_HBRIDGE; |
1539 | s->n_chan = 8; |
1540 | s->maxdata = devpriv->pwm_buf_sz; |
1541 | s->insn_write = usbduxsigma_pwm_write; |
1542 | s->insn_config = usbduxsigma_pwm_config; |
1543 | |
1544 | usbduxsigma_pwm_period(dev, s, PWM_DEFAULT_PERIOD); |
1545 | } |
1546 | |
1547 | offset = usbduxsigma_getstatusinfo(dev, chan: 0); |
1548 | if (offset < 0) { |
1549 | dev_err(dev->class_dev, |
1550 | "Communication to USBDUXSIGMA failed! Check firmware and cabling.\n" ); |
1551 | return offset; |
1552 | } |
1553 | |
1554 | dev_info(dev->class_dev, "ADC_zero = %x\n" , offset); |
1555 | |
1556 | return 0; |
1557 | } |
1558 | |
1559 | static void usbduxsigma_detach(struct comedi_device *dev) |
1560 | { |
1561 | struct usb_interface *intf = comedi_to_usb_interface(dev); |
1562 | struct usbduxsigma_private *devpriv = dev->private; |
1563 | |
1564 | usb_set_intfdata(intf, NULL); |
1565 | |
1566 | if (!devpriv) |
1567 | return; |
1568 | |
1569 | mutex_lock(&devpriv->mut); |
1570 | |
1571 | /* force unlink all urbs */ |
1572 | usbduxsigma_ai_stop(dev, do_unlink: 1); |
1573 | usbduxsigma_ao_stop(dev, do_unlink: 1); |
1574 | usbduxsigma_pwm_stop(dev, do_unlink: 1); |
1575 | |
1576 | usbduxsigma_free_usb_buffers(dev); |
1577 | |
1578 | mutex_unlock(lock: &devpriv->mut); |
1579 | |
1580 | mutex_destroy(lock: &devpriv->mut); |
1581 | } |
1582 | |
1583 | static struct comedi_driver usbduxsigma_driver = { |
1584 | .driver_name = "usbduxsigma" , |
1585 | .module = THIS_MODULE, |
1586 | .auto_attach = usbduxsigma_auto_attach, |
1587 | .detach = usbduxsigma_detach, |
1588 | }; |
1589 | |
1590 | static int usbduxsigma_usb_probe(struct usb_interface *intf, |
1591 | const struct usb_device_id *id) |
1592 | { |
1593 | return comedi_usb_auto_config(intf, driver: &usbduxsigma_driver, context: 0); |
1594 | } |
1595 | |
1596 | static const struct usb_device_id usbduxsigma_usb_table[] = { |
1597 | { USB_DEVICE(0x13d8, 0x0020) }, |
1598 | { USB_DEVICE(0x13d8, 0x0021) }, |
1599 | { USB_DEVICE(0x13d8, 0x0022) }, |
1600 | { } |
1601 | }; |
1602 | MODULE_DEVICE_TABLE(usb, usbduxsigma_usb_table); |
1603 | |
1604 | static struct usb_driver usbduxsigma_usb_driver = { |
1605 | .name = "usbduxsigma" , |
1606 | .probe = usbduxsigma_usb_probe, |
1607 | .disconnect = comedi_usb_auto_unconfig, |
1608 | .id_table = usbduxsigma_usb_table, |
1609 | }; |
1610 | module_comedi_usb_driver(usbduxsigma_driver, usbduxsigma_usb_driver); |
1611 | |
1612 | MODULE_AUTHOR("Bernd Porr, mail@berndporr.me.uk" ); |
1613 | MODULE_DESCRIPTION("Stirling/ITL USB-DUX SIGMA -- mail@berndporr.me.uk" ); |
1614 | MODULE_LICENSE("GPL" ); |
1615 | MODULE_FIRMWARE(FIRMWARE); |
1616 | |