1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * vmk80xx.c |
4 | * Velleman USB Board Low-Level Driver |
5 | * |
6 | * Copyright (C) 2009 Manuel Gebele <forensixs@gmx.de>, Germany |
7 | * |
8 | * COMEDI - Linux Control and Measurement Device Interface |
9 | * Copyright (C) 2000 David A. Schleef <ds@schleef.org> |
10 | */ |
11 | |
12 | /* |
13 | * Driver: vmk80xx |
14 | * Description: Velleman USB Board Low-Level Driver |
15 | * Devices: [Velleman] K8055 (K8055/VM110), K8061 (K8061/VM140), |
16 | * VM110 (K8055/VM110), VM140 (K8061/VM140) |
17 | * Author: Manuel Gebele <forensixs@gmx.de> |
18 | * Updated: Sun, 10 May 2009 11:14:59 +0200 |
19 | * Status: works |
20 | * |
21 | * Supports: |
22 | * - analog input |
23 | * - analog output |
24 | * - digital input |
25 | * - digital output |
26 | * - counter |
27 | * - pwm |
28 | */ |
29 | |
30 | #include <linux/kernel.h> |
31 | #include <linux/module.h> |
32 | #include <linux/mutex.h> |
33 | #include <linux/errno.h> |
34 | #include <linux/input.h> |
35 | #include <linux/slab.h> |
36 | #include <linux/poll.h> |
37 | #include <linux/uaccess.h> |
38 | #include <linux/comedi/comedi_usb.h> |
39 | |
40 | enum { |
41 | DEVICE_VMK8055, |
42 | DEVICE_VMK8061 |
43 | }; |
44 | |
45 | #define VMK8055_DI_REG 0x00 |
46 | #define VMK8055_DO_REG 0x01 |
47 | #define VMK8055_AO1_REG 0x02 |
48 | #define VMK8055_AO2_REG 0x03 |
49 | #define VMK8055_AI1_REG 0x02 |
50 | #define VMK8055_AI2_REG 0x03 |
51 | #define VMK8055_CNT1_REG 0x04 |
52 | #define VMK8055_CNT2_REG 0x06 |
53 | |
54 | #define VMK8061_CH_REG 0x01 |
55 | #define VMK8061_DI_REG 0x01 |
56 | #define VMK8061_DO_REG 0x01 |
57 | #define VMK8061_PWM_REG1 0x01 |
58 | #define VMK8061_PWM_REG2 0x02 |
59 | #define VMK8061_CNT_REG 0x02 |
60 | #define VMK8061_AO_REG 0x02 |
61 | #define VMK8061_AI_REG1 0x02 |
62 | #define VMK8061_AI_REG2 0x03 |
63 | |
64 | #define VMK8055_CMD_RST 0x00 |
65 | #define VMK8055_CMD_DEB1_TIME 0x01 |
66 | #define VMK8055_CMD_DEB2_TIME 0x02 |
67 | #define VMK8055_CMD_RST_CNT1 0x03 |
68 | #define VMK8055_CMD_RST_CNT2 0x04 |
69 | #define VMK8055_CMD_WRT_AD 0x05 |
70 | |
71 | #define VMK8061_CMD_RD_AI 0x00 |
72 | #define VMK8061_CMR_RD_ALL_AI 0x01 /* !non-active! */ |
73 | #define VMK8061_CMD_SET_AO 0x02 |
74 | #define VMK8061_CMD_SET_ALL_AO 0x03 /* !non-active! */ |
75 | #define VMK8061_CMD_OUT_PWM 0x04 |
76 | #define VMK8061_CMD_RD_DI 0x05 |
77 | #define VMK8061_CMD_DO 0x06 /* !non-active! */ |
78 | #define VMK8061_CMD_CLR_DO 0x07 |
79 | #define VMK8061_CMD_SET_DO 0x08 |
80 | #define VMK8061_CMD_RD_CNT 0x09 /* TODO: completely pointless? */ |
81 | #define VMK8061_CMD_RST_CNT 0x0a /* TODO: completely pointless? */ |
82 | #define VMK8061_CMD_RD_VERSION 0x0b /* internal usage */ |
83 | #define VMK8061_CMD_RD_JMP_STAT 0x0c /* TODO: not implemented yet */ |
84 | #define VMK8061_CMD_RD_PWR_STAT 0x0d /* internal usage */ |
85 | #define VMK8061_CMD_RD_DO 0x0e |
86 | #define VMK8061_CMD_RD_AO 0x0f |
87 | #define VMK8061_CMD_RD_PWM 0x10 |
88 | |
89 | #define IC3_VERSION BIT(0) |
90 | #define IC6_VERSION BIT(1) |
91 | |
92 | #define MIN_BUF_SIZE 64 |
93 | #define PACKET_TIMEOUT 10000 /* ms */ |
94 | |
95 | enum vmk80xx_model { |
96 | VMK8055_MODEL, |
97 | VMK8061_MODEL |
98 | }; |
99 | |
100 | static const struct comedi_lrange vmk8061_range = { |
101 | 2, { |
102 | UNI_RANGE(5), |
103 | UNI_RANGE(10) |
104 | } |
105 | }; |
106 | |
107 | struct vmk80xx_board { |
108 | const char *name; |
109 | enum vmk80xx_model model; |
110 | const struct comedi_lrange *range; |
111 | int ai_nchans; |
112 | unsigned int ai_maxdata; |
113 | int ao_nchans; |
114 | int di_nchans; |
115 | unsigned int cnt_maxdata; |
116 | int pwm_nchans; |
117 | unsigned int pwm_maxdata; |
118 | }; |
119 | |
120 | static const struct vmk80xx_board vmk80xx_boardinfo[] = { |
121 | [DEVICE_VMK8055] = { |
122 | .name = "K8055 (VM110)" , |
123 | .model = VMK8055_MODEL, |
124 | .range = &range_unipolar5, |
125 | .ai_nchans = 2, |
126 | .ai_maxdata = 0x00ff, |
127 | .ao_nchans = 2, |
128 | .di_nchans = 6, |
129 | .cnt_maxdata = 0xffff, |
130 | }, |
131 | [DEVICE_VMK8061] = { |
132 | .name = "K8061 (VM140)" , |
133 | .model = VMK8061_MODEL, |
134 | .range = &vmk8061_range, |
135 | .ai_nchans = 8, |
136 | .ai_maxdata = 0x03ff, |
137 | .ao_nchans = 8, |
138 | .di_nchans = 8, |
139 | .cnt_maxdata = 0, /* unknown, device is not writeable */ |
140 | .pwm_nchans = 1, |
141 | .pwm_maxdata = 0x03ff, |
142 | }, |
143 | }; |
144 | |
145 | struct vmk80xx_private { |
146 | struct usb_endpoint_descriptor *ep_rx; |
147 | struct usb_endpoint_descriptor *ep_tx; |
148 | struct semaphore limit_sem; |
149 | unsigned char *usb_rx_buf; |
150 | unsigned char *usb_tx_buf; |
151 | enum vmk80xx_model model; |
152 | }; |
153 | |
154 | static void vmk80xx_do_bulk_msg(struct comedi_device *dev) |
155 | { |
156 | struct vmk80xx_private *devpriv = dev->private; |
157 | struct usb_device *usb = comedi_to_usb_dev(dev); |
158 | __u8 tx_addr; |
159 | __u8 rx_addr; |
160 | unsigned int tx_pipe; |
161 | unsigned int rx_pipe; |
162 | size_t tx_size; |
163 | size_t rx_size; |
164 | |
165 | tx_addr = devpriv->ep_tx->bEndpointAddress; |
166 | rx_addr = devpriv->ep_rx->bEndpointAddress; |
167 | tx_pipe = usb_sndbulkpipe(usb, tx_addr); |
168 | rx_pipe = usb_rcvbulkpipe(usb, rx_addr); |
169 | tx_size = usb_endpoint_maxp(epd: devpriv->ep_tx); |
170 | rx_size = usb_endpoint_maxp(epd: devpriv->ep_rx); |
171 | |
172 | usb_bulk_msg(usb_dev: usb, pipe: tx_pipe, data: devpriv->usb_tx_buf, len: tx_size, NULL, |
173 | PACKET_TIMEOUT); |
174 | |
175 | usb_bulk_msg(usb_dev: usb, pipe: rx_pipe, data: devpriv->usb_rx_buf, len: rx_size, NULL, |
176 | PACKET_TIMEOUT); |
177 | } |
178 | |
179 | static int vmk80xx_read_packet(struct comedi_device *dev) |
180 | { |
181 | struct vmk80xx_private *devpriv = dev->private; |
182 | struct usb_device *usb = comedi_to_usb_dev(dev); |
183 | struct usb_endpoint_descriptor *ep; |
184 | unsigned int pipe; |
185 | |
186 | if (devpriv->model == VMK8061_MODEL) { |
187 | vmk80xx_do_bulk_msg(dev); |
188 | return 0; |
189 | } |
190 | |
191 | ep = devpriv->ep_rx; |
192 | pipe = usb_rcvintpipe(usb, ep->bEndpointAddress); |
193 | return usb_interrupt_msg(usb_dev: usb, pipe, data: devpriv->usb_rx_buf, |
194 | len: usb_endpoint_maxp(epd: ep), NULL, |
195 | PACKET_TIMEOUT); |
196 | } |
197 | |
198 | static int vmk80xx_write_packet(struct comedi_device *dev, int cmd) |
199 | { |
200 | struct vmk80xx_private *devpriv = dev->private; |
201 | struct usb_device *usb = comedi_to_usb_dev(dev); |
202 | struct usb_endpoint_descriptor *ep; |
203 | unsigned int pipe; |
204 | |
205 | devpriv->usb_tx_buf[0] = cmd; |
206 | |
207 | if (devpriv->model == VMK8061_MODEL) { |
208 | vmk80xx_do_bulk_msg(dev); |
209 | return 0; |
210 | } |
211 | |
212 | ep = devpriv->ep_tx; |
213 | pipe = usb_sndintpipe(usb, ep->bEndpointAddress); |
214 | return usb_interrupt_msg(usb_dev: usb, pipe, data: devpriv->usb_tx_buf, |
215 | len: usb_endpoint_maxp(epd: ep), NULL, |
216 | PACKET_TIMEOUT); |
217 | } |
218 | |
219 | static int vmk80xx_reset_device(struct comedi_device *dev) |
220 | { |
221 | struct vmk80xx_private *devpriv = dev->private; |
222 | size_t size; |
223 | int retval; |
224 | |
225 | size = usb_endpoint_maxp(epd: devpriv->ep_tx); |
226 | memset(devpriv->usb_tx_buf, 0, size); |
227 | retval = vmk80xx_write_packet(dev, VMK8055_CMD_RST); |
228 | if (retval) |
229 | return retval; |
230 | /* set outputs to known state as we cannot read them */ |
231 | return vmk80xx_write_packet(dev, VMK8055_CMD_WRT_AD); |
232 | } |
233 | |
234 | static int vmk80xx_ai_insn_read(struct comedi_device *dev, |
235 | struct comedi_subdevice *s, |
236 | struct comedi_insn *insn, |
237 | unsigned int *data) |
238 | { |
239 | struct vmk80xx_private *devpriv = dev->private; |
240 | int chan; |
241 | int reg[2]; |
242 | int n; |
243 | |
244 | down(sem: &devpriv->limit_sem); |
245 | chan = CR_CHAN(insn->chanspec); |
246 | |
247 | switch (devpriv->model) { |
248 | case VMK8055_MODEL: |
249 | if (!chan) |
250 | reg[0] = VMK8055_AI1_REG; |
251 | else |
252 | reg[0] = VMK8055_AI2_REG; |
253 | break; |
254 | case VMK8061_MODEL: |
255 | default: |
256 | reg[0] = VMK8061_AI_REG1; |
257 | reg[1] = VMK8061_AI_REG2; |
258 | devpriv->usb_tx_buf[0] = VMK8061_CMD_RD_AI; |
259 | devpriv->usb_tx_buf[VMK8061_CH_REG] = chan; |
260 | break; |
261 | } |
262 | |
263 | for (n = 0; n < insn->n; n++) { |
264 | if (vmk80xx_read_packet(dev)) |
265 | break; |
266 | |
267 | if (devpriv->model == VMK8055_MODEL) { |
268 | data[n] = devpriv->usb_rx_buf[reg[0]]; |
269 | continue; |
270 | } |
271 | |
272 | /* VMK8061_MODEL */ |
273 | data[n] = devpriv->usb_rx_buf[reg[0]] + 256 * |
274 | devpriv->usb_rx_buf[reg[1]]; |
275 | } |
276 | |
277 | up(sem: &devpriv->limit_sem); |
278 | |
279 | return n; |
280 | } |
281 | |
282 | static int vmk80xx_ao_insn_write(struct comedi_device *dev, |
283 | struct comedi_subdevice *s, |
284 | struct comedi_insn *insn, |
285 | unsigned int *data) |
286 | { |
287 | struct vmk80xx_private *devpriv = dev->private; |
288 | int chan; |
289 | int cmd; |
290 | int reg; |
291 | int n; |
292 | |
293 | down(sem: &devpriv->limit_sem); |
294 | chan = CR_CHAN(insn->chanspec); |
295 | |
296 | switch (devpriv->model) { |
297 | case VMK8055_MODEL: |
298 | cmd = VMK8055_CMD_WRT_AD; |
299 | if (!chan) |
300 | reg = VMK8055_AO1_REG; |
301 | else |
302 | reg = VMK8055_AO2_REG; |
303 | break; |
304 | default: /* NOTE: avoid compiler warnings */ |
305 | cmd = VMK8061_CMD_SET_AO; |
306 | reg = VMK8061_AO_REG; |
307 | devpriv->usb_tx_buf[VMK8061_CH_REG] = chan; |
308 | break; |
309 | } |
310 | |
311 | for (n = 0; n < insn->n; n++) { |
312 | devpriv->usb_tx_buf[reg] = data[n]; |
313 | |
314 | if (vmk80xx_write_packet(dev, cmd)) |
315 | break; |
316 | } |
317 | |
318 | up(sem: &devpriv->limit_sem); |
319 | |
320 | return n; |
321 | } |
322 | |
323 | static int vmk80xx_ao_insn_read(struct comedi_device *dev, |
324 | struct comedi_subdevice *s, |
325 | struct comedi_insn *insn, |
326 | unsigned int *data) |
327 | { |
328 | struct vmk80xx_private *devpriv = dev->private; |
329 | int chan; |
330 | int reg; |
331 | int n; |
332 | |
333 | down(sem: &devpriv->limit_sem); |
334 | chan = CR_CHAN(insn->chanspec); |
335 | |
336 | reg = VMK8061_AO_REG - 1; |
337 | |
338 | devpriv->usb_tx_buf[0] = VMK8061_CMD_RD_AO; |
339 | |
340 | for (n = 0; n < insn->n; n++) { |
341 | if (vmk80xx_read_packet(dev)) |
342 | break; |
343 | |
344 | data[n] = devpriv->usb_rx_buf[reg + chan]; |
345 | } |
346 | |
347 | up(sem: &devpriv->limit_sem); |
348 | |
349 | return n; |
350 | } |
351 | |
352 | static int vmk80xx_di_insn_bits(struct comedi_device *dev, |
353 | struct comedi_subdevice *s, |
354 | struct comedi_insn *insn, |
355 | unsigned int *data) |
356 | { |
357 | struct vmk80xx_private *devpriv = dev->private; |
358 | unsigned char *rx_buf; |
359 | int reg; |
360 | int retval; |
361 | |
362 | down(sem: &devpriv->limit_sem); |
363 | |
364 | rx_buf = devpriv->usb_rx_buf; |
365 | |
366 | if (devpriv->model == VMK8061_MODEL) { |
367 | reg = VMK8061_DI_REG; |
368 | devpriv->usb_tx_buf[0] = VMK8061_CMD_RD_DI; |
369 | } else { |
370 | reg = VMK8055_DI_REG; |
371 | } |
372 | |
373 | retval = vmk80xx_read_packet(dev); |
374 | |
375 | if (!retval) { |
376 | if (devpriv->model == VMK8055_MODEL) |
377 | data[1] = (((rx_buf[reg] >> 4) & 0x03) | |
378 | ((rx_buf[reg] << 2) & 0x04) | |
379 | ((rx_buf[reg] >> 3) & 0x18)); |
380 | else |
381 | data[1] = rx_buf[reg]; |
382 | |
383 | retval = 2; |
384 | } |
385 | |
386 | up(sem: &devpriv->limit_sem); |
387 | |
388 | return retval; |
389 | } |
390 | |
391 | static int vmk80xx_do_insn_bits(struct comedi_device *dev, |
392 | struct comedi_subdevice *s, |
393 | struct comedi_insn *insn, |
394 | unsigned int *data) |
395 | { |
396 | struct vmk80xx_private *devpriv = dev->private; |
397 | unsigned char *rx_buf = devpriv->usb_rx_buf; |
398 | unsigned char *tx_buf = devpriv->usb_tx_buf; |
399 | int reg, cmd; |
400 | int ret = 0; |
401 | |
402 | if (devpriv->model == VMK8061_MODEL) { |
403 | reg = VMK8061_DO_REG; |
404 | cmd = VMK8061_CMD_DO; |
405 | } else { /* VMK8055_MODEL */ |
406 | reg = VMK8055_DO_REG; |
407 | cmd = VMK8055_CMD_WRT_AD; |
408 | } |
409 | |
410 | down(sem: &devpriv->limit_sem); |
411 | |
412 | if (comedi_dio_update_state(s, data)) { |
413 | tx_buf[reg] = s->state; |
414 | ret = vmk80xx_write_packet(dev, cmd); |
415 | if (ret) |
416 | goto out; |
417 | } |
418 | |
419 | if (devpriv->model == VMK8061_MODEL) { |
420 | tx_buf[0] = VMK8061_CMD_RD_DO; |
421 | ret = vmk80xx_read_packet(dev); |
422 | if (ret) |
423 | goto out; |
424 | data[1] = rx_buf[reg]; |
425 | } else { |
426 | data[1] = s->state; |
427 | } |
428 | |
429 | out: |
430 | up(sem: &devpriv->limit_sem); |
431 | |
432 | return ret ? ret : insn->n; |
433 | } |
434 | |
435 | static int vmk80xx_cnt_insn_read(struct comedi_device *dev, |
436 | struct comedi_subdevice *s, |
437 | struct comedi_insn *insn, |
438 | unsigned int *data) |
439 | { |
440 | struct vmk80xx_private *devpriv = dev->private; |
441 | int chan; |
442 | int reg[2]; |
443 | int n; |
444 | |
445 | down(sem: &devpriv->limit_sem); |
446 | chan = CR_CHAN(insn->chanspec); |
447 | |
448 | switch (devpriv->model) { |
449 | case VMK8055_MODEL: |
450 | if (!chan) |
451 | reg[0] = VMK8055_CNT1_REG; |
452 | else |
453 | reg[0] = VMK8055_CNT2_REG; |
454 | break; |
455 | case VMK8061_MODEL: |
456 | default: |
457 | reg[0] = VMK8061_CNT_REG; |
458 | reg[1] = VMK8061_CNT_REG; |
459 | devpriv->usb_tx_buf[0] = VMK8061_CMD_RD_CNT; |
460 | break; |
461 | } |
462 | |
463 | for (n = 0; n < insn->n; n++) { |
464 | if (vmk80xx_read_packet(dev)) |
465 | break; |
466 | |
467 | if (devpriv->model == VMK8055_MODEL) |
468 | data[n] = devpriv->usb_rx_buf[reg[0]]; |
469 | else /* VMK8061_MODEL */ |
470 | data[n] = devpriv->usb_rx_buf[reg[0] * (chan + 1) + 1] |
471 | + 256 * devpriv->usb_rx_buf[reg[1] * 2 + 2]; |
472 | } |
473 | |
474 | up(sem: &devpriv->limit_sem); |
475 | |
476 | return n; |
477 | } |
478 | |
479 | static int vmk80xx_cnt_insn_config(struct comedi_device *dev, |
480 | struct comedi_subdevice *s, |
481 | struct comedi_insn *insn, |
482 | unsigned int *data) |
483 | { |
484 | struct vmk80xx_private *devpriv = dev->private; |
485 | unsigned int chan = CR_CHAN(insn->chanspec); |
486 | int cmd; |
487 | int reg; |
488 | int ret; |
489 | |
490 | down(sem: &devpriv->limit_sem); |
491 | switch (data[0]) { |
492 | case INSN_CONFIG_RESET: |
493 | if (devpriv->model == VMK8055_MODEL) { |
494 | if (!chan) { |
495 | cmd = VMK8055_CMD_RST_CNT1; |
496 | reg = VMK8055_CNT1_REG; |
497 | } else { |
498 | cmd = VMK8055_CMD_RST_CNT2; |
499 | reg = VMK8055_CNT2_REG; |
500 | } |
501 | devpriv->usb_tx_buf[reg] = 0x00; |
502 | } else { |
503 | cmd = VMK8061_CMD_RST_CNT; |
504 | } |
505 | ret = vmk80xx_write_packet(dev, cmd); |
506 | break; |
507 | default: |
508 | ret = -EINVAL; |
509 | break; |
510 | } |
511 | up(sem: &devpriv->limit_sem); |
512 | |
513 | return ret ? ret : insn->n; |
514 | } |
515 | |
516 | static int vmk80xx_cnt_insn_write(struct comedi_device *dev, |
517 | struct comedi_subdevice *s, |
518 | struct comedi_insn *insn, |
519 | unsigned int *data) |
520 | { |
521 | struct vmk80xx_private *devpriv = dev->private; |
522 | unsigned long debtime; |
523 | unsigned long val; |
524 | int chan; |
525 | int cmd; |
526 | int n; |
527 | |
528 | down(sem: &devpriv->limit_sem); |
529 | chan = CR_CHAN(insn->chanspec); |
530 | |
531 | if (!chan) |
532 | cmd = VMK8055_CMD_DEB1_TIME; |
533 | else |
534 | cmd = VMK8055_CMD_DEB2_TIME; |
535 | |
536 | for (n = 0; n < insn->n; n++) { |
537 | debtime = data[n]; |
538 | if (debtime == 0) |
539 | debtime = 1; |
540 | |
541 | /* TODO: Prevent overflows */ |
542 | if (debtime > 7450) |
543 | debtime = 7450; |
544 | |
545 | val = int_sqrt(debtime * 1000 / 115); |
546 | if (((val + 1) * val) < debtime * 1000 / 115) |
547 | val += 1; |
548 | |
549 | devpriv->usb_tx_buf[6 + chan] = val; |
550 | |
551 | if (vmk80xx_write_packet(dev, cmd)) |
552 | break; |
553 | } |
554 | |
555 | up(sem: &devpriv->limit_sem); |
556 | |
557 | return n; |
558 | } |
559 | |
560 | static int vmk80xx_pwm_insn_read(struct comedi_device *dev, |
561 | struct comedi_subdevice *s, |
562 | struct comedi_insn *insn, |
563 | unsigned int *data) |
564 | { |
565 | struct vmk80xx_private *devpriv = dev->private; |
566 | unsigned char *tx_buf; |
567 | unsigned char *rx_buf; |
568 | int reg[2]; |
569 | int n; |
570 | |
571 | down(sem: &devpriv->limit_sem); |
572 | |
573 | tx_buf = devpriv->usb_tx_buf; |
574 | rx_buf = devpriv->usb_rx_buf; |
575 | |
576 | reg[0] = VMK8061_PWM_REG1; |
577 | reg[1] = VMK8061_PWM_REG2; |
578 | |
579 | tx_buf[0] = VMK8061_CMD_RD_PWM; |
580 | |
581 | for (n = 0; n < insn->n; n++) { |
582 | if (vmk80xx_read_packet(dev)) |
583 | break; |
584 | |
585 | data[n] = rx_buf[reg[0]] + 4 * rx_buf[reg[1]]; |
586 | } |
587 | |
588 | up(sem: &devpriv->limit_sem); |
589 | |
590 | return n; |
591 | } |
592 | |
593 | static int vmk80xx_pwm_insn_write(struct comedi_device *dev, |
594 | struct comedi_subdevice *s, |
595 | struct comedi_insn *insn, |
596 | unsigned int *data) |
597 | { |
598 | struct vmk80xx_private *devpriv = dev->private; |
599 | unsigned char *tx_buf; |
600 | int reg[2]; |
601 | int cmd; |
602 | int n; |
603 | |
604 | down(sem: &devpriv->limit_sem); |
605 | |
606 | tx_buf = devpriv->usb_tx_buf; |
607 | |
608 | reg[0] = VMK8061_PWM_REG1; |
609 | reg[1] = VMK8061_PWM_REG2; |
610 | |
611 | cmd = VMK8061_CMD_OUT_PWM; |
612 | |
613 | /* |
614 | * The followin piece of code was translated from the inline |
615 | * assembler code in the DLL source code. |
616 | * |
617 | * asm |
618 | * mov eax, k ; k is the value (data[n]) |
619 | * and al, 03h ; al are the lower 8 bits of eax |
620 | * mov lo, al ; lo is the low part (tx_buf[reg[0]]) |
621 | * mov eax, k |
622 | * shr eax, 2 ; right shift eax register by 2 |
623 | * mov hi, al ; hi is the high part (tx_buf[reg[1]]) |
624 | * end; |
625 | */ |
626 | for (n = 0; n < insn->n; n++) { |
627 | tx_buf[reg[0]] = (unsigned char)(data[n] & 0x03); |
628 | tx_buf[reg[1]] = (unsigned char)(data[n] >> 2) & 0xff; |
629 | |
630 | if (vmk80xx_write_packet(dev, cmd)) |
631 | break; |
632 | } |
633 | |
634 | up(sem: &devpriv->limit_sem); |
635 | |
636 | return n; |
637 | } |
638 | |
639 | static int vmk80xx_find_usb_endpoints(struct comedi_device *dev) |
640 | { |
641 | struct vmk80xx_private *devpriv = dev->private; |
642 | struct usb_interface *intf = comedi_to_usb_interface(dev); |
643 | struct usb_host_interface *iface_desc = intf->cur_altsetting; |
644 | struct usb_endpoint_descriptor *ep_rx_desc, *ep_tx_desc; |
645 | int ret; |
646 | |
647 | if (devpriv->model == VMK8061_MODEL) |
648 | ret = usb_find_common_endpoints(alt: iface_desc, bulk_in: &ep_rx_desc, |
649 | bulk_out: &ep_tx_desc, NULL, NULL); |
650 | else |
651 | ret = usb_find_common_endpoints(alt: iface_desc, NULL, NULL, |
652 | int_in: &ep_rx_desc, int_out: &ep_tx_desc); |
653 | |
654 | if (ret) |
655 | return -ENODEV; |
656 | |
657 | devpriv->ep_rx = ep_rx_desc; |
658 | devpriv->ep_tx = ep_tx_desc; |
659 | |
660 | if (!usb_endpoint_maxp(epd: devpriv->ep_rx) || !usb_endpoint_maxp(epd: devpriv->ep_tx)) |
661 | return -EINVAL; |
662 | |
663 | return 0; |
664 | } |
665 | |
666 | static int vmk80xx_alloc_usb_buffers(struct comedi_device *dev) |
667 | { |
668 | struct vmk80xx_private *devpriv = dev->private; |
669 | size_t size; |
670 | |
671 | size = max(usb_endpoint_maxp(devpriv->ep_rx), MIN_BUF_SIZE); |
672 | devpriv->usb_rx_buf = kzalloc(size, GFP_KERNEL); |
673 | if (!devpriv->usb_rx_buf) |
674 | return -ENOMEM; |
675 | |
676 | size = max(usb_endpoint_maxp(devpriv->ep_tx), MIN_BUF_SIZE); |
677 | devpriv->usb_tx_buf = kzalloc(size, GFP_KERNEL); |
678 | if (!devpriv->usb_tx_buf) |
679 | return -ENOMEM; |
680 | |
681 | return 0; |
682 | } |
683 | |
684 | static int vmk80xx_init_subdevices(struct comedi_device *dev) |
685 | { |
686 | const struct vmk80xx_board *board = dev->board_ptr; |
687 | struct vmk80xx_private *devpriv = dev->private; |
688 | struct comedi_subdevice *s; |
689 | int n_subd; |
690 | int ret; |
691 | |
692 | down(sem: &devpriv->limit_sem); |
693 | |
694 | if (devpriv->model == VMK8055_MODEL) |
695 | n_subd = 5; |
696 | else |
697 | n_subd = 6; |
698 | ret = comedi_alloc_subdevices(dev, num_subdevices: n_subd); |
699 | if (ret) { |
700 | up(sem: &devpriv->limit_sem); |
701 | return ret; |
702 | } |
703 | |
704 | /* Analog input subdevice */ |
705 | s = &dev->subdevices[0]; |
706 | s->type = COMEDI_SUBD_AI; |
707 | s->subdev_flags = SDF_READABLE | SDF_GROUND; |
708 | s->n_chan = board->ai_nchans; |
709 | s->maxdata = board->ai_maxdata; |
710 | s->range_table = board->range; |
711 | s->insn_read = vmk80xx_ai_insn_read; |
712 | |
713 | /* Analog output subdevice */ |
714 | s = &dev->subdevices[1]; |
715 | s->type = COMEDI_SUBD_AO; |
716 | s->subdev_flags = SDF_WRITABLE | SDF_GROUND; |
717 | s->n_chan = board->ao_nchans; |
718 | s->maxdata = 0x00ff; |
719 | s->range_table = board->range; |
720 | s->insn_write = vmk80xx_ao_insn_write; |
721 | if (devpriv->model == VMK8061_MODEL) { |
722 | s->subdev_flags |= SDF_READABLE; |
723 | s->insn_read = vmk80xx_ao_insn_read; |
724 | } |
725 | |
726 | /* Digital input subdevice */ |
727 | s = &dev->subdevices[2]; |
728 | s->type = COMEDI_SUBD_DI; |
729 | s->subdev_flags = SDF_READABLE; |
730 | s->n_chan = board->di_nchans; |
731 | s->maxdata = 1; |
732 | s->range_table = &range_digital; |
733 | s->insn_bits = vmk80xx_di_insn_bits; |
734 | |
735 | /* Digital output subdevice */ |
736 | s = &dev->subdevices[3]; |
737 | s->type = COMEDI_SUBD_DO; |
738 | s->subdev_flags = SDF_WRITABLE; |
739 | s->n_chan = 8; |
740 | s->maxdata = 1; |
741 | s->range_table = &range_digital; |
742 | s->insn_bits = vmk80xx_do_insn_bits; |
743 | |
744 | /* Counter subdevice */ |
745 | s = &dev->subdevices[4]; |
746 | s->type = COMEDI_SUBD_COUNTER; |
747 | s->subdev_flags = SDF_READABLE; |
748 | s->n_chan = 2; |
749 | s->maxdata = board->cnt_maxdata; |
750 | s->insn_read = vmk80xx_cnt_insn_read; |
751 | s->insn_config = vmk80xx_cnt_insn_config; |
752 | if (devpriv->model == VMK8055_MODEL) { |
753 | s->subdev_flags |= SDF_WRITABLE; |
754 | s->insn_write = vmk80xx_cnt_insn_write; |
755 | } |
756 | |
757 | /* PWM subdevice */ |
758 | if (devpriv->model == VMK8061_MODEL) { |
759 | s = &dev->subdevices[5]; |
760 | s->type = COMEDI_SUBD_PWM; |
761 | s->subdev_flags = SDF_READABLE | SDF_WRITABLE; |
762 | s->n_chan = board->pwm_nchans; |
763 | s->maxdata = board->pwm_maxdata; |
764 | s->insn_read = vmk80xx_pwm_insn_read; |
765 | s->insn_write = vmk80xx_pwm_insn_write; |
766 | } |
767 | |
768 | up(sem: &devpriv->limit_sem); |
769 | |
770 | return 0; |
771 | } |
772 | |
773 | static int vmk80xx_auto_attach(struct comedi_device *dev, |
774 | unsigned long context) |
775 | { |
776 | struct usb_interface *intf = comedi_to_usb_interface(dev); |
777 | const struct vmk80xx_board *board = NULL; |
778 | struct vmk80xx_private *devpriv; |
779 | int ret; |
780 | |
781 | if (context < ARRAY_SIZE(vmk80xx_boardinfo)) |
782 | board = &vmk80xx_boardinfo[context]; |
783 | if (!board) |
784 | return -ENODEV; |
785 | dev->board_ptr = board; |
786 | dev->board_name = board->name; |
787 | |
788 | devpriv = comedi_alloc_devpriv(dev, size: sizeof(*devpriv)); |
789 | if (!devpriv) |
790 | return -ENOMEM; |
791 | |
792 | devpriv->model = board->model; |
793 | |
794 | sema_init(sem: &devpriv->limit_sem, val: 8); |
795 | |
796 | ret = vmk80xx_find_usb_endpoints(dev); |
797 | if (ret) |
798 | return ret; |
799 | |
800 | ret = vmk80xx_alloc_usb_buffers(dev); |
801 | if (ret) |
802 | return ret; |
803 | |
804 | usb_set_intfdata(intf, data: devpriv); |
805 | |
806 | if (devpriv->model == VMK8055_MODEL) |
807 | vmk80xx_reset_device(dev); |
808 | |
809 | return vmk80xx_init_subdevices(dev); |
810 | } |
811 | |
812 | static void vmk80xx_detach(struct comedi_device *dev) |
813 | { |
814 | struct usb_interface *intf = comedi_to_usb_interface(dev); |
815 | struct vmk80xx_private *devpriv = dev->private; |
816 | |
817 | if (!devpriv) |
818 | return; |
819 | |
820 | down(sem: &devpriv->limit_sem); |
821 | |
822 | usb_set_intfdata(intf, NULL); |
823 | |
824 | kfree(objp: devpriv->usb_rx_buf); |
825 | kfree(objp: devpriv->usb_tx_buf); |
826 | |
827 | up(sem: &devpriv->limit_sem); |
828 | } |
829 | |
830 | static struct comedi_driver vmk80xx_driver = { |
831 | .module = THIS_MODULE, |
832 | .driver_name = "vmk80xx" , |
833 | .auto_attach = vmk80xx_auto_attach, |
834 | .detach = vmk80xx_detach, |
835 | }; |
836 | |
837 | static int vmk80xx_usb_probe(struct usb_interface *intf, |
838 | const struct usb_device_id *id) |
839 | { |
840 | return comedi_usb_auto_config(intf, driver: &vmk80xx_driver, context: id->driver_info); |
841 | } |
842 | |
843 | static const struct usb_device_id vmk80xx_usb_id_table[] = { |
844 | { USB_DEVICE(0x10cf, 0x5500), .driver_info = DEVICE_VMK8055 }, |
845 | { USB_DEVICE(0x10cf, 0x5501), .driver_info = DEVICE_VMK8055 }, |
846 | { USB_DEVICE(0x10cf, 0x5502), .driver_info = DEVICE_VMK8055 }, |
847 | { USB_DEVICE(0x10cf, 0x5503), .driver_info = DEVICE_VMK8055 }, |
848 | { USB_DEVICE(0x10cf, 0x8061), .driver_info = DEVICE_VMK8061 }, |
849 | { USB_DEVICE(0x10cf, 0x8062), .driver_info = DEVICE_VMK8061 }, |
850 | { USB_DEVICE(0x10cf, 0x8063), .driver_info = DEVICE_VMK8061 }, |
851 | { USB_DEVICE(0x10cf, 0x8064), .driver_info = DEVICE_VMK8061 }, |
852 | { USB_DEVICE(0x10cf, 0x8065), .driver_info = DEVICE_VMK8061 }, |
853 | { USB_DEVICE(0x10cf, 0x8066), .driver_info = DEVICE_VMK8061 }, |
854 | { USB_DEVICE(0x10cf, 0x8067), .driver_info = DEVICE_VMK8061 }, |
855 | { USB_DEVICE(0x10cf, 0x8068), .driver_info = DEVICE_VMK8061 }, |
856 | { } |
857 | }; |
858 | MODULE_DEVICE_TABLE(usb, vmk80xx_usb_id_table); |
859 | |
860 | static struct usb_driver vmk80xx_usb_driver = { |
861 | .name = "vmk80xx" , |
862 | .id_table = vmk80xx_usb_id_table, |
863 | .probe = vmk80xx_usb_probe, |
864 | .disconnect = comedi_usb_auto_unconfig, |
865 | }; |
866 | module_comedi_usb_driver(vmk80xx_driver, vmk80xx_usb_driver); |
867 | |
868 | MODULE_AUTHOR("Manuel Gebele <forensixs@gmx.de>" ); |
869 | MODULE_DESCRIPTION("Velleman USB Board Low-Level Driver" ); |
870 | MODULE_LICENSE("GPL" ); |
871 | |