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1da177e4 LT |
1 | /* |
2 | * dscore.c | |
3 | * | |
4 | * Copyright (c) 2004 Evgeniy Polyakov <johnpol@2ka.mipt.ru> | |
5 | * | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | ||
22 | #include <linux/module.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/mod_devicetable.h> | |
25 | #include <linux/usb.h> | |
26 | ||
27 | #include "dscore.h" | |
28 | ||
29 | static struct usb_device_id ds_id_table [] = { | |
30 | { USB_DEVICE(0x04fa, 0x2490) }, | |
31 | { }, | |
32 | }; | |
33 | MODULE_DEVICE_TABLE(usb, ds_id_table); | |
34 | ||
35 | int ds_probe(struct usb_interface *, const struct usb_device_id *); | |
36 | void ds_disconnect(struct usb_interface *); | |
37 | ||
38 | int ds_touch_bit(struct ds_device *, u8, u8 *); | |
39 | int ds_read_byte(struct ds_device *, u8 *); | |
40 | int ds_read_bit(struct ds_device *, u8 *); | |
41 | int ds_write_byte(struct ds_device *, u8); | |
42 | int ds_write_bit(struct ds_device *, u8); | |
43 | int ds_start_pulse(struct ds_device *, int); | |
44 | int ds_set_speed(struct ds_device *, int); | |
45 | int ds_reset(struct ds_device *, struct ds_status *); | |
46 | int ds_detect(struct ds_device *, struct ds_status *); | |
47 | int ds_stop_pulse(struct ds_device *, int); | |
48 | struct ds_device * ds_get_device(void); | |
49 | void ds_put_device(struct ds_device *); | |
50 | ||
51 | static inline void ds_dump_status(unsigned char *, unsigned char *, int); | |
52 | static int ds_send_control(struct ds_device *, u16, u16); | |
53 | static int ds_send_control_mode(struct ds_device *, u16, u16); | |
54 | static int ds_send_control_cmd(struct ds_device *, u16, u16); | |
55 | ||
56 | ||
57 | static struct usb_driver ds_driver = { | |
58 | .owner = THIS_MODULE, | |
59 | .name = "DS9490R", | |
60 | .probe = ds_probe, | |
61 | .disconnect = ds_disconnect, | |
62 | .id_table = ds_id_table, | |
63 | }; | |
64 | ||
65 | static struct ds_device *ds_dev; | |
66 | ||
67 | struct ds_device * ds_get_device(void) | |
68 | { | |
69 | if (ds_dev) | |
70 | atomic_inc(&ds_dev->refcnt); | |
71 | return ds_dev; | |
72 | } | |
73 | ||
74 | void ds_put_device(struct ds_device *dev) | |
75 | { | |
76 | atomic_dec(&dev->refcnt); | |
77 | } | |
78 | ||
79 | static int ds_send_control_cmd(struct ds_device *dev, u16 value, u16 index) | |
80 | { | |
81 | int err; | |
82 | ||
83 | err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]), | |
84 | CONTROL_CMD, 0x40, value, index, NULL, 0, 1000); | |
85 | if (err < 0) { | |
86 | printk(KERN_ERR "Failed to send command control message %x.%x: err=%d.\n", | |
87 | value, index, err); | |
88 | return err; | |
89 | } | |
90 | ||
91 | return err; | |
92 | } | |
93 | ||
94 | static int ds_send_control_mode(struct ds_device *dev, u16 value, u16 index) | |
95 | { | |
96 | int err; | |
97 | ||
98 | err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]), | |
99 | MODE_CMD, 0x40, value, index, NULL, 0, 1000); | |
100 | if (err < 0) { | |
101 | printk(KERN_ERR "Failed to send mode control message %x.%x: err=%d.\n", | |
102 | value, index, err); | |
103 | return err; | |
104 | } | |
105 | ||
106 | return err; | |
107 | } | |
108 | ||
109 | static int ds_send_control(struct ds_device *dev, u16 value, u16 index) | |
110 | { | |
111 | int err; | |
112 | ||
113 | err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]), | |
114 | COMM_CMD, 0x40, value, index, NULL, 0, 1000); | |
115 | if (err < 0) { | |
116 | printk(KERN_ERR "Failed to send control message %x.%x: err=%d.\n", | |
117 | value, index, err); | |
118 | return err; | |
119 | } | |
120 | ||
121 | return err; | |
122 | } | |
123 | ||
124 | static inline void ds_dump_status(unsigned char *buf, unsigned char *str, int off) | |
125 | { | |
126 | printk("%45s: %8x\n", str, buf[off]); | |
127 | } | |
128 | ||
129 | int ds_recv_status_nodump(struct ds_device *dev, struct ds_status *st, unsigned char *buf, int size) | |
130 | { | |
131 | int count, err; | |
132 | ||
133 | memset(st, 0, sizeof(st)); | |
134 | ||
135 | count = 0; | |
136 | err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_STATUS]), buf, size, &count, 100); | |
137 | if (err < 0) { | |
138 | printk(KERN_ERR "Failed to read 1-wire data from 0x%x: err=%d.\n", dev->ep[EP_STATUS], err); | |
139 | return err; | |
140 | } | |
141 | ||
142 | if (count >= sizeof(*st)) | |
143 | memcpy(st, buf, sizeof(*st)); | |
144 | ||
145 | return count; | |
146 | } | |
147 | ||
148 | static int ds_recv_status(struct ds_device *dev, struct ds_status *st) | |
149 | { | |
150 | unsigned char buf[64]; | |
151 | int count, err = 0, i; | |
152 | ||
153 | memcpy(st, buf, sizeof(*st)); | |
154 | ||
155 | count = ds_recv_status_nodump(dev, st, buf, sizeof(buf)); | |
156 | if (count < 0) | |
157 | return err; | |
158 | ||
159 | printk("0x%x: count=%d, status: ", dev->ep[EP_STATUS], count); | |
160 | for (i=0; i<count; ++i) | |
161 | printk("%02x ", buf[i]); | |
162 | printk("\n"); | |
163 | ||
164 | if (count >= 16) { | |
165 | ds_dump_status(buf, "enable flag", 0); | |
166 | ds_dump_status(buf, "1-wire speed", 1); | |
167 | ds_dump_status(buf, "strong pullup duration", 2); | |
168 | ds_dump_status(buf, "programming pulse duration", 3); | |
169 | ds_dump_status(buf, "pulldown slew rate control", 4); | |
170 | ds_dump_status(buf, "write-1 low time", 5); | |
171 | ds_dump_status(buf, "data sample offset/write-0 recovery time", 6); | |
172 | ds_dump_status(buf, "reserved (test register)", 7); | |
173 | ds_dump_status(buf, "device status flags", 8); | |
174 | ds_dump_status(buf, "communication command byte 1", 9); | |
175 | ds_dump_status(buf, "communication command byte 2", 10); | |
176 | ds_dump_status(buf, "communication command buffer status", 11); | |
177 | ds_dump_status(buf, "1-wire data output buffer status", 12); | |
178 | ds_dump_status(buf, "1-wire data input buffer status", 13); | |
179 | ds_dump_status(buf, "reserved", 14); | |
180 | ds_dump_status(buf, "reserved", 15); | |
181 | } | |
182 | ||
183 | memcpy(st, buf, sizeof(*st)); | |
184 | ||
185 | if (st->status & ST_EPOF) { | |
186 | printk(KERN_INFO "Resetting device after ST_EPOF.\n"); | |
187 | err = ds_send_control_cmd(dev, CTL_RESET_DEVICE, 0); | |
188 | if (err) | |
189 | return err; | |
190 | count = ds_recv_status_nodump(dev, st, buf, sizeof(buf)); | |
191 | if (count < 0) | |
192 | return err; | |
193 | } | |
194 | #if 0 | |
195 | if (st->status & ST_IDLE) { | |
196 | printk(KERN_INFO "Resetting pulse after ST_IDLE.\n"); | |
197 | err = ds_start_pulse(dev, PULLUP_PULSE_DURATION); | |
198 | if (err) | |
199 | return err; | |
200 | } | |
201 | #endif | |
202 | ||
203 | return err; | |
204 | } | |
205 | ||
206 | static int ds_recv_data(struct ds_device *dev, unsigned char *buf, int size) | |
207 | { | |
208 | int count, err; | |
209 | struct ds_status st; | |
210 | ||
211 | count = 0; | |
212 | err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]), | |
213 | buf, size, &count, 1000); | |
214 | if (err < 0) { | |
215 | printk(KERN_INFO "Clearing ep0x%x.\n", dev->ep[EP_DATA_IN]); | |
216 | usb_clear_halt(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN])); | |
217 | ds_recv_status(dev, &st); | |
218 | return err; | |
219 | } | |
220 | ||
221 | #if 0 | |
222 | { | |
223 | int i; | |
224 | ||
225 | printk("%s: count=%d: ", __func__, count); | |
226 | for (i=0; i<count; ++i) | |
227 | printk("%02x ", buf[i]); | |
228 | printk("\n"); | |
229 | } | |
230 | #endif | |
231 | return count; | |
232 | } | |
233 | ||
234 | static int ds_send_data(struct ds_device *dev, unsigned char *buf, int len) | |
235 | { | |
236 | int count, err; | |
237 | ||
238 | count = 0; | |
239 | err = usb_bulk_msg(dev->udev, usb_sndbulkpipe(dev->udev, dev->ep[EP_DATA_OUT]), buf, len, &count, 1000); | |
240 | if (err < 0) { | |
241 | printk(KERN_ERR "Failed to read 1-wire data from 0x02: err=%d.\n", err); | |
242 | return err; | |
243 | } | |
244 | ||
245 | return err; | |
246 | } | |
247 | ||
248 | int ds_stop_pulse(struct ds_device *dev, int limit) | |
249 | { | |
250 | struct ds_status st; | |
251 | int count = 0, err = 0; | |
252 | u8 buf[0x20]; | |
253 | ||
254 | do { | |
255 | err = ds_send_control(dev, CTL_HALT_EXE_IDLE, 0); | |
256 | if (err) | |
257 | break; | |
258 | err = ds_send_control(dev, CTL_RESUME_EXE, 0); | |
259 | if (err) | |
260 | break; | |
261 | err = ds_recv_status_nodump(dev, &st, buf, sizeof(buf)); | |
262 | if (err) | |
263 | break; | |
264 | ||
265 | if ((st.status & ST_SPUA) == 0) { | |
266 | err = ds_send_control_mode(dev, MOD_PULSE_EN, 0); | |
267 | if (err) | |
268 | break; | |
269 | } | |
270 | } while(++count < limit); | |
271 | ||
272 | return err; | |
273 | } | |
274 | ||
275 | int ds_detect(struct ds_device *dev, struct ds_status *st) | |
276 | { | |
277 | int err; | |
278 | ||
279 | err = ds_send_control_cmd(dev, CTL_RESET_DEVICE, 0); | |
280 | if (err) | |
281 | return err; | |
282 | ||
283 | err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM, 0); | |
284 | if (err) | |
285 | return err; | |
286 | ||
287 | err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM | COMM_TYPE, 0x40); | |
288 | if (err) | |
289 | return err; | |
290 | ||
291 | err = ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_PROG); | |
292 | if (err) | |
293 | return err; | |
294 | ||
295 | err = ds_recv_status(dev, st); | |
296 | ||
297 | return err; | |
298 | } | |
299 | ||
300 | int ds_wait_status(struct ds_device *dev, struct ds_status *st) | |
301 | { | |
302 | u8 buf[0x20]; | |
303 | int err, count = 0; | |
304 | ||
305 | do { | |
306 | err = ds_recv_status_nodump(dev, st, buf, sizeof(buf)); | |
307 | #if 0 | |
308 | if (err >= 0) { | |
309 | int i; | |
310 | printk("0x%x: count=%d, status: ", dev->ep[EP_STATUS], err); | |
311 | for (i=0; i<err; ++i) | |
312 | printk("%02x ", buf[i]); | |
313 | printk("\n"); | |
314 | } | |
315 | #endif | |
316 | } while(!(buf[0x08] & 0x20) && !(err < 0) && ++count < 100); | |
317 | ||
318 | ||
319 | if (((err > 16) && (buf[0x10] & 0x01)) || count >= 100 || err < 0) { | |
320 | ds_recv_status(dev, st); | |
321 | return -1; | |
322 | } | |
323 | else { | |
324 | return 0; | |
325 | } | |
326 | } | |
327 | ||
328 | int ds_reset(struct ds_device *dev, struct ds_status *st) | |
329 | { | |
330 | int err; | |
331 | ||
332 | //err = ds_send_control(dev, COMM_1_WIRE_RESET | COMM_F | COMM_IM | COMM_SE, SPEED_FLEXIBLE); | |
333 | err = ds_send_control(dev, 0x43, SPEED_NORMAL); | |
334 | if (err) | |
335 | return err; | |
336 | ||
337 | ds_wait_status(dev, st); | |
338 | #if 0 | |
339 | if (st->command_buffer_status) { | |
340 | printk(KERN_INFO "Short circuit.\n"); | |
341 | return -EIO; | |
342 | } | |
343 | #endif | |
344 | ||
345 | return 0; | |
346 | } | |
347 | ||
348 | int ds_set_speed(struct ds_device *dev, int speed) | |
349 | { | |
350 | int err; | |
351 | ||
352 | if (speed != SPEED_NORMAL && speed != SPEED_FLEXIBLE && speed != SPEED_OVERDRIVE) | |
353 | return -EINVAL; | |
354 | ||
355 | if (speed != SPEED_OVERDRIVE) | |
356 | speed = SPEED_FLEXIBLE; | |
357 | ||
358 | speed &= 0xff; | |
359 | ||
360 | err = ds_send_control_mode(dev, MOD_1WIRE_SPEED, speed); | |
361 | if (err) | |
362 | return err; | |
363 | ||
364 | return err; | |
365 | } | |
366 | ||
367 | int ds_start_pulse(struct ds_device *dev, int delay) | |
368 | { | |
369 | int err; | |
370 | u8 del = 1 + (u8)(delay >> 4); | |
371 | struct ds_status st; | |
372 | ||
373 | #if 0 | |
374 | err = ds_stop_pulse(dev, 10); | |
375 | if (err) | |
376 | return err; | |
377 | ||
378 | err = ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_SPUE); | |
379 | if (err) | |
380 | return err; | |
381 | #endif | |
382 | err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM, del); | |
383 | if (err) | |
384 | return err; | |
385 | ||
386 | err = ds_send_control(dev, COMM_PULSE | COMM_IM | COMM_F, 0); | |
387 | if (err) | |
388 | return err; | |
389 | ||
390 | mdelay(delay); | |
391 | ||
392 | ds_wait_status(dev, &st); | |
393 | ||
394 | return err; | |
395 | } | |
396 | ||
397 | int ds_touch_bit(struct ds_device *dev, u8 bit, u8 *tbit) | |
398 | { | |
399 | int err, count; | |
400 | struct ds_status st; | |
401 | u16 value = (COMM_BIT_IO | COMM_IM) | ((bit) ? COMM_D : 0); | |
402 | u16 cmd; | |
403 | ||
404 | err = ds_send_control(dev, value, 0); | |
405 | if (err) | |
406 | return err; | |
407 | ||
408 | count = 0; | |
409 | do { | |
410 | err = ds_wait_status(dev, &st); | |
411 | if (err) | |
412 | return err; | |
413 | ||
414 | cmd = st.command0 | (st.command1 << 8); | |
415 | } while (cmd != value && ++count < 10); | |
416 | ||
417 | if (err < 0 || count >= 10) { | |
418 | printk(KERN_ERR "Failed to obtain status.\n"); | |
419 | return -EINVAL; | |
420 | } | |
421 | ||
422 | err = ds_recv_data(dev, tbit, sizeof(*tbit)); | |
423 | if (err < 0) | |
424 | return err; | |
425 | ||
426 | return 0; | |
427 | } | |
428 | ||
429 | int ds_write_bit(struct ds_device *dev, u8 bit) | |
430 | { | |
431 | int err; | |
432 | struct ds_status st; | |
433 | ||
434 | err = ds_send_control(dev, COMM_BIT_IO | COMM_IM | (bit) ? COMM_D : 0, 0); | |
435 | if (err) | |
436 | return err; | |
437 | ||
438 | ds_wait_status(dev, &st); | |
439 | ||
440 | return 0; | |
441 | } | |
442 | ||
443 | int ds_write_byte(struct ds_device *dev, u8 byte) | |
444 | { | |
445 | int err; | |
446 | struct ds_status st; | |
447 | u8 rbyte; | |
448 | ||
449 | err = ds_send_control(dev, COMM_BYTE_IO | COMM_IM | COMM_SPU, byte); | |
450 | if (err) | |
451 | return err; | |
452 | ||
453 | err = ds_wait_status(dev, &st); | |
454 | if (err) | |
455 | return err; | |
456 | ||
457 | err = ds_recv_data(dev, &rbyte, sizeof(rbyte)); | |
458 | if (err < 0) | |
459 | return err; | |
460 | ||
461 | ds_start_pulse(dev, PULLUP_PULSE_DURATION); | |
462 | ||
463 | return !(byte == rbyte); | |
464 | } | |
465 | ||
466 | int ds_read_bit(struct ds_device *dev, u8 *bit) | |
467 | { | |
468 | int err; | |
469 | ||
470 | err = ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_SPUE); | |
471 | if (err) | |
472 | return err; | |
473 | ||
474 | err = ds_send_control(dev, COMM_BIT_IO | COMM_IM | COMM_SPU | COMM_D, 0); | |
475 | if (err) | |
476 | return err; | |
477 | ||
478 | err = ds_recv_data(dev, bit, sizeof(*bit)); | |
479 | if (err < 0) | |
480 | return err; | |
481 | ||
482 | return 0; | |
483 | } | |
484 | ||
485 | int ds_read_byte(struct ds_device *dev, u8 *byte) | |
486 | { | |
487 | int err; | |
488 | struct ds_status st; | |
489 | ||
490 | err = ds_send_control(dev, COMM_BYTE_IO | COMM_IM , 0xff); | |
491 | if (err) | |
492 | return err; | |
493 | ||
494 | ds_wait_status(dev, &st); | |
495 | ||
496 | err = ds_recv_data(dev, byte, sizeof(*byte)); | |
497 | if (err < 0) | |
498 | return err; | |
499 | ||
500 | return 0; | |
501 | } | |
502 | ||
503 | int ds_read_block(struct ds_device *dev, u8 *buf, int len) | |
504 | { | |
505 | struct ds_status st; | |
506 | int err; | |
507 | ||
508 | if (len > 64*1024) | |
509 | return -E2BIG; | |
510 | ||
511 | memset(buf, 0xFF, len); | |
512 | ||
513 | err = ds_send_data(dev, buf, len); | |
514 | if (err < 0) | |
515 | return err; | |
516 | ||
517 | err = ds_send_control(dev, COMM_BLOCK_IO | COMM_IM | COMM_SPU, len); | |
518 | if (err) | |
519 | return err; | |
520 | ||
521 | ds_wait_status(dev, &st); | |
522 | ||
523 | memset(buf, 0x00, len); | |
524 | err = ds_recv_data(dev, buf, len); | |
525 | ||
526 | return err; | |
527 | } | |
528 | ||
529 | int ds_write_block(struct ds_device *dev, u8 *buf, int len) | |
530 | { | |
531 | int err; | |
532 | struct ds_status st; | |
533 | ||
534 | err = ds_send_data(dev, buf, len); | |
535 | if (err < 0) | |
536 | return err; | |
537 | ||
538 | ds_wait_status(dev, &st); | |
539 | ||
540 | err = ds_send_control(dev, COMM_BLOCK_IO | COMM_IM | COMM_SPU, len); | |
541 | if (err) | |
542 | return err; | |
543 | ||
544 | ds_wait_status(dev, &st); | |
545 | ||
546 | err = ds_recv_data(dev, buf, len); | |
547 | if (err < 0) | |
548 | return err; | |
549 | ||
550 | ds_start_pulse(dev, PULLUP_PULSE_DURATION); | |
551 | ||
552 | return !(err == len); | |
553 | } | |
554 | ||
555 | int ds_search(struct ds_device *dev, u64 init, u64 *buf, u8 id_number, int conditional_search) | |
556 | { | |
557 | int err; | |
558 | u16 value, index; | |
559 | struct ds_status st; | |
560 | ||
561 | memset(buf, 0, sizeof(buf)); | |
562 | ||
563 | err = ds_send_data(ds_dev, (unsigned char *)&init, 8); | |
564 | if (err) | |
565 | return err; | |
566 | ||
567 | ds_wait_status(ds_dev, &st); | |
568 | ||
569 | value = COMM_SEARCH_ACCESS | COMM_IM | COMM_SM | COMM_F | COMM_RTS; | |
570 | index = (conditional_search ? 0xEC : 0xF0) | (id_number << 8); | |
571 | err = ds_send_control(ds_dev, value, index); | |
572 | if (err) | |
573 | return err; | |
574 | ||
575 | ds_wait_status(ds_dev, &st); | |
576 | ||
577 | err = ds_recv_data(ds_dev, (unsigned char *)buf, 8*id_number); | |
578 | if (err < 0) | |
579 | return err; | |
580 | ||
581 | return err/8; | |
582 | } | |
583 | ||
584 | int ds_match_access(struct ds_device *dev, u64 init) | |
585 | { | |
586 | int err; | |
587 | struct ds_status st; | |
588 | ||
589 | err = ds_send_data(dev, (unsigned char *)&init, sizeof(init)); | |
590 | if (err) | |
591 | return err; | |
592 | ||
593 | ds_wait_status(dev, &st); | |
594 | ||
595 | err = ds_send_control(dev, COMM_MATCH_ACCESS | COMM_IM | COMM_RST, 0x0055); | |
596 | if (err) | |
597 | return err; | |
598 | ||
599 | ds_wait_status(dev, &st); | |
600 | ||
601 | return 0; | |
602 | } | |
603 | ||
604 | int ds_set_path(struct ds_device *dev, u64 init) | |
605 | { | |
606 | int err; | |
607 | struct ds_status st; | |
608 | u8 buf[9]; | |
609 | ||
610 | memcpy(buf, &init, 8); | |
611 | buf[8] = BRANCH_MAIN; | |
612 | ||
613 | err = ds_send_data(dev, buf, sizeof(buf)); | |
614 | if (err) | |
615 | return err; | |
616 | ||
617 | ds_wait_status(dev, &st); | |
618 | ||
619 | err = ds_send_control(dev, COMM_SET_PATH | COMM_IM | COMM_RST, 0); | |
620 | if (err) | |
621 | return err; | |
622 | ||
623 | ds_wait_status(dev, &st); | |
624 | ||
625 | return 0; | |
626 | } | |
627 | ||
628 | int ds_probe(struct usb_interface *intf, const struct usb_device_id *udev_id) | |
629 | { | |
630 | struct usb_device *udev = interface_to_usbdev(intf); | |
631 | struct usb_endpoint_descriptor *endpoint; | |
632 | struct usb_host_interface *iface_desc; | |
633 | int i, err; | |
634 | ||
635 | ds_dev = kmalloc(sizeof(struct ds_device), GFP_KERNEL); | |
636 | if (!ds_dev) { | |
637 | printk(KERN_INFO "Failed to allocate new DS9490R structure.\n"); | |
638 | return -ENOMEM; | |
639 | } | |
640 | ||
641 | ds_dev->udev = usb_get_dev(udev); | |
642 | usb_set_intfdata(intf, ds_dev); | |
643 | ||
644 | err = usb_set_interface(ds_dev->udev, intf->altsetting[0].desc.bInterfaceNumber, 3); | |
645 | if (err) { | |
646 | printk(KERN_ERR "Failed to set alternative setting 3 for %d interface: err=%d.\n", | |
647 | intf->altsetting[0].desc.bInterfaceNumber, err); | |
648 | return err; | |
649 | } | |
650 | ||
651 | err = usb_reset_configuration(ds_dev->udev); | |
652 | if (err) { | |
653 | printk(KERN_ERR "Failed to reset configuration: err=%d.\n", err); | |
654 | return err; | |
655 | } | |
656 | ||
657 | iface_desc = &intf->altsetting[0]; | |
658 | if (iface_desc->desc.bNumEndpoints != NUM_EP-1) { | |
659 | printk(KERN_INFO "Num endpoints=%d. It is not DS9490R.\n", iface_desc->desc.bNumEndpoints); | |
660 | return -ENODEV; | |
661 | } | |
662 | ||
663 | atomic_set(&ds_dev->refcnt, 0); | |
664 | memset(ds_dev->ep, 0, sizeof(ds_dev->ep)); | |
665 | ||
666 | /* | |
667 | * This loop doesn'd show control 0 endpoint, | |
668 | * so we will fill only 1-3 endpoints entry. | |
669 | */ | |
670 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
671 | endpoint = &iface_desc->endpoint[i].desc; | |
672 | ||
673 | ds_dev->ep[i+1] = endpoint->bEndpointAddress; | |
674 | ||
675 | printk("%d: addr=%x, size=%d, dir=%s, type=%x\n", | |
676 | i, endpoint->bEndpointAddress, le16_to_cpu(endpoint->wMaxPacketSize), | |
677 | (endpoint->bEndpointAddress & USB_DIR_IN)?"IN":"OUT", | |
678 | endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK); | |
679 | } | |
680 | ||
681 | #if 0 | |
682 | { | |
683 | int err, i; | |
684 | u64 buf[3]; | |
685 | u64 init=0xb30000002078ee81ull; | |
686 | struct ds_status st; | |
687 | ||
688 | ds_reset(ds_dev, &st); | |
689 | err = ds_search(ds_dev, init, buf, 3, 0); | |
690 | if (err < 0) | |
691 | return err; | |
692 | for (i=0; i<err; ++i) | |
693 | printk("%d: %llx\n", i, buf[i]); | |
694 | ||
695 | printk("Resetting...\n"); | |
696 | ds_reset(ds_dev, &st); | |
697 | printk("Setting path for %llx.\n", init); | |
698 | err = ds_set_path(ds_dev, init); | |
699 | if (err) | |
700 | return err; | |
701 | printk("Calling MATCH_ACCESS.\n"); | |
702 | err = ds_match_access(ds_dev, init); | |
703 | if (err) | |
704 | return err; | |
705 | ||
706 | printk("Searching the bus...\n"); | |
707 | err = ds_search(ds_dev, init, buf, 3, 0); | |
708 | ||
709 | printk("ds_search() returned %d\n", err); | |
710 | ||
711 | if (err < 0) | |
712 | return err; | |
713 | for (i=0; i<err; ++i) | |
714 | printk("%d: %llx\n", i, buf[i]); | |
715 | ||
716 | return 0; | |
717 | } | |
718 | #endif | |
719 | ||
720 | return 0; | |
721 | } | |
722 | ||
723 | void ds_disconnect(struct usb_interface *intf) | |
724 | { | |
725 | struct ds_device *dev; | |
726 | ||
727 | dev = usb_get_intfdata(intf); | |
728 | usb_set_intfdata(intf, NULL); | |
729 | ||
730 | while (atomic_read(&dev->refcnt)) { | |
731 | printk(KERN_INFO "Waiting for DS to become free: refcnt=%d.\n", | |
732 | atomic_read(&dev->refcnt)); | |
733 | ||
734 | if (msleep_interruptible(1000)) | |
735 | flush_signals(current); | |
736 | } | |
737 | ||
738 | usb_put_dev(dev->udev); | |
739 | kfree(dev); | |
740 | ds_dev = NULL; | |
741 | } | |
742 | ||
743 | int ds_init(void) | |
744 | { | |
745 | int err; | |
746 | ||
747 | err = usb_register(&ds_driver); | |
748 | if (err) { | |
749 | printk(KERN_INFO "Failed to register DS9490R USB device: err=%d.\n", err); | |
750 | return err; | |
751 | } | |
752 | ||
753 | return 0; | |
754 | } | |
755 | ||
756 | void ds_fini(void) | |
757 | { | |
758 | usb_deregister(&ds_driver); | |
759 | } | |
760 | ||
761 | module_init(ds_init); | |
762 | module_exit(ds_fini); | |
763 | ||
764 | MODULE_LICENSE("GPL"); | |
765 | MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>"); | |
766 | ||
767 | EXPORT_SYMBOL(ds_touch_bit); | |
768 | EXPORT_SYMBOL(ds_read_byte); | |
769 | EXPORT_SYMBOL(ds_read_bit); | |
770 | EXPORT_SYMBOL(ds_read_block); | |
771 | EXPORT_SYMBOL(ds_write_byte); | |
772 | EXPORT_SYMBOL(ds_write_bit); | |
773 | EXPORT_SYMBOL(ds_write_block); | |
774 | EXPORT_SYMBOL(ds_reset); | |
775 | EXPORT_SYMBOL(ds_get_device); | |
776 | EXPORT_SYMBOL(ds_put_device); | |
777 | ||
778 | /* | |
779 | * This functions can be used for EEPROM programming, | |
780 | * when driver will be included into mainline this will | |
781 | * require uncommenting. | |
782 | */ | |
783 | #if 0 | |
784 | EXPORT_SYMBOL(ds_start_pulse); | |
785 | EXPORT_SYMBOL(ds_set_speed); | |
786 | EXPORT_SYMBOL(ds_detect); | |
787 | EXPORT_SYMBOL(ds_stop_pulse); | |
788 | EXPORT_SYMBOL(ds_search); | |
789 | #endif |