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 "../w1_int.h"
28 #include "../w1.h"
29
30 /* COMMAND TYPE CODES */
31 #define CONTROL_CMD 0x00
32 #define COMM_CMD 0x01
33 #define MODE_CMD 0x02
34
35 /* CONTROL COMMAND CODES */
36 #define CTL_RESET_DEVICE 0x0000
37 #define CTL_START_EXE 0x0001
38 #define CTL_RESUME_EXE 0x0002
39 #define CTL_HALT_EXE_IDLE 0x0003
40 #define CTL_HALT_EXE_DONE 0x0004
41 #define CTL_FLUSH_COMM_CMDS 0x0007
42 #define CTL_FLUSH_RCV_BUFFER 0x0008
43 #define CTL_FLUSH_XMT_BUFFER 0x0009
44 #define CTL_GET_COMM_CMDS 0x000A
45
46 /* MODE COMMAND CODES */
47 #define MOD_PULSE_EN 0x0000
48 #define MOD_SPEED_CHANGE_EN 0x0001
49 #define MOD_1WIRE_SPEED 0x0002
50 #define MOD_STRONG_PU_DURATION 0x0003
51 #define MOD_PULLDOWN_SLEWRATE 0x0004
52 #define MOD_PROG_PULSE_DURATION 0x0005
53 #define MOD_WRITE1_LOWTIME 0x0006
54 #define MOD_DSOW0_TREC 0x0007
55
56 /* COMMUNICATION COMMAND CODES */
57 #define COMM_ERROR_ESCAPE 0x0601
58 #define COMM_SET_DURATION 0x0012
59 #define COMM_BIT_IO 0x0020
60 #define COMM_PULSE 0x0030
61 #define COMM_1_WIRE_RESET 0x0042
62 #define COMM_BYTE_IO 0x0052
63 #define COMM_MATCH_ACCESS 0x0064
64 #define COMM_BLOCK_IO 0x0074
65 #define COMM_READ_STRAIGHT 0x0080
66 #define COMM_DO_RELEASE 0x6092
67 #define COMM_SET_PATH 0x00A2
68 #define COMM_WRITE_SRAM_PAGE 0x00B2
69 #define COMM_WRITE_EPROM 0x00C4
70 #define COMM_READ_CRC_PROT_PAGE 0x00D4
71 #define COMM_READ_REDIRECT_PAGE_CRC 0x21E4
72 #define COMM_SEARCH_ACCESS 0x00F4
73
74 /* Communication command bits */
75 #define COMM_TYPE 0x0008
76 #define COMM_SE 0x0008
77 #define COMM_D 0x0008
78 #define COMM_Z 0x0008
79 #define COMM_CH 0x0008
80 #define COMM_SM 0x0008
81 #define COMM_R 0x0008
82 #define COMM_IM 0x0001
83
84 #define COMM_PS 0x4000
85 #define COMM_PST 0x4000
86 #define COMM_CIB 0x4000
87 #define COMM_RTS 0x4000
88 #define COMM_DT 0x2000
89 #define COMM_SPU 0x1000
90 #define COMM_F 0x0800
91 #define COMM_NTP 0x0400
92 #define COMM_ICP 0x0200
93 #define COMM_RST 0x0100
94
95 #define PULSE_PROG 0x01
96 #define PULSE_SPUE 0x02
97
98 #define BRANCH_MAIN 0xCC
99 #define BRANCH_AUX 0x33
100
101 /*
102 * Duration of the strong pull-up pulse in milliseconds.
103 */
104 #define PULLUP_PULSE_DURATION 750
105
106 /* Status flags */
107 #define ST_SPUA 0x01 /* Strong Pull-up is active */
108 #define ST_PRGA 0x02 /* 12V programming pulse is being generated */
109 #define ST_12VP 0x04 /* external 12V programming voltage is present */
110 #define ST_PMOD 0x08 /* DS2490 powered from USB and external sources */
111 #define ST_HALT 0x10 /* DS2490 is currently halted */
112 #define ST_IDLE 0x20 /* DS2490 is currently idle */
113 #define ST_EPOF 0x80
114
115 #define SPEED_NORMAL 0x00
116 #define SPEED_FLEXIBLE 0x01
117 #define SPEED_OVERDRIVE 0x02
118
119 #define NUM_EP 4
120 #define EP_CONTROL 0
121 #define EP_STATUS 1
122 #define EP_DATA_OUT 2
123 #define EP_DATA_IN 3
124
125 struct ds_device
126 {
127 struct list_head ds_entry;
128
129 struct usb_device *udev;
130 struct usb_interface *intf;
131
132 int ep[NUM_EP];
133
134 struct w1_bus_master master;
135 };
136
137 struct ds_status
138 {
139 u8 enable;
140 u8 speed;
141 u8 pullup_dur;
142 u8 ppuls_dur;
143 u8 pulldown_slew;
144 u8 write1_time;
145 u8 write0_time;
146 u8 reserved0;
147 u8 status;
148 u8 command0;
149 u8 command1;
150 u8 command_buffer_status;
151 u8 data_out_buffer_status;
152 u8 data_in_buffer_status;
153 u8 reserved1;
154 u8 reserved2;
155
156 };
157
158 static struct usb_device_id ds_id_table [] = {
159 { USB_DEVICE(0x04fa, 0x2490) },
160 { },
161 };
162 MODULE_DEVICE_TABLE(usb, ds_id_table);
163
164 static int ds_probe(struct usb_interface *, const struct usb_device_id *);
165 static void ds_disconnect(struct usb_interface *);
166
167 static inline void ds_dump_status(unsigned char *, unsigned char *, int);
168 static int ds_send_control(struct ds_device *, u16, u16);
169 static int ds_send_control_cmd(struct ds_device *, u16, u16);
170
171 static LIST_HEAD(ds_devices);
172 static DEFINE_MUTEX(ds_mutex);
173
174 static struct usb_driver ds_driver = {
175 .name = "DS9490R",
176 .probe = ds_probe,
177 .disconnect = ds_disconnect,
178 .id_table = ds_id_table,
179 };
180
181 static int ds_send_control_cmd(struct ds_device *dev, u16 value, u16 index)
182 {
183 int err;
184
185 err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),
186 CONTROL_CMD, 0x40, value, index, NULL, 0, 1000);
187 if (err < 0) {
188 printk(KERN_ERR "Failed to send command control message %x.%x: err=%d.\n",
189 value, index, err);
190 return err;
191 }
192
193 return err;
194 }
195 #if 0
196 static int ds_send_control_mode(struct ds_device *dev, u16 value, u16 index)
197 {
198 int err;
199
200 err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),
201 MODE_CMD, 0x40, value, index, NULL, 0, 1000);
202 if (err < 0) {
203 printk(KERN_ERR "Failed to send mode control message %x.%x: err=%d.\n",
204 value, index, err);
205 return err;
206 }
207
208 return err;
209 }
210 #endif
211 static int ds_send_control(struct ds_device *dev, u16 value, u16 index)
212 {
213 int err;
214
215 err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]),
216 COMM_CMD, 0x40, value, index, NULL, 0, 1000);
217 if (err < 0) {
218 printk(KERN_ERR "Failed to send control message %x.%x: err=%d.\n",
219 value, index, err);
220 return err;
221 }
222
223 return err;
224 }
225
226 static inline void ds_dump_status(unsigned char *buf, unsigned char *str, int off)
227 {
228 printk("%45s: %8x\n", str, buf[off]);
229 }
230
231 static int ds_recv_status_nodump(struct ds_device *dev, struct ds_status *st,
232 unsigned char *buf, int size)
233 {
234 int count, err;
235
236 memset(st, 0, sizeof(*st));
237
238 count = 0;
239 err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_STATUS]), buf, size, &count, 100);
240 if (err < 0) {
241 printk(KERN_ERR "Failed to read 1-wire data from 0x%x: err=%d.\n", dev->ep[EP_STATUS], err);
242 return err;
243 }
244
245 if (count >= sizeof(*st))
246 memcpy(st, buf, sizeof(*st));
247
248 return count;
249 }
250
251 static int ds_recv_status(struct ds_device *dev, struct ds_status *st)
252 {
253 unsigned char buf[64];
254 int count, err = 0, i;
255
256 memcpy(st, buf, sizeof(*st));
257
258 count = ds_recv_status_nodump(dev, st, buf, sizeof(buf));
259 if (count < 0)
260 return err;
261
262 printk("0x%x: count=%d, status: ", dev->ep[EP_STATUS], count);
263 for (i=0; i<count; ++i)
264 printk("%02x ", buf[i]);
265 printk("\n");
266
267 if (count >= 16) {
268 ds_dump_status(buf, "enable flag", 0);
269 ds_dump_status(buf, "1-wire speed", 1);
270 ds_dump_status(buf, "strong pullup duration", 2);
271 ds_dump_status(buf, "programming pulse duration", 3);
272 ds_dump_status(buf, "pulldown slew rate control", 4);
273 ds_dump_status(buf, "write-1 low time", 5);
274 ds_dump_status(buf, "data sample offset/write-0 recovery time", 6);
275 ds_dump_status(buf, "reserved (test register)", 7);
276 ds_dump_status(buf, "device status flags", 8);
277 ds_dump_status(buf, "communication command byte 1", 9);
278 ds_dump_status(buf, "communication command byte 2", 10);
279 ds_dump_status(buf, "communication command buffer status", 11);
280 ds_dump_status(buf, "1-wire data output buffer status", 12);
281 ds_dump_status(buf, "1-wire data input buffer status", 13);
282 ds_dump_status(buf, "reserved", 14);
283 ds_dump_status(buf, "reserved", 15);
284 }
285
286 memcpy(st, buf, sizeof(*st));
287
288 if (st->status & ST_EPOF) {
289 printk(KERN_INFO "Resetting device after ST_EPOF.\n");
290 err = ds_send_control_cmd(dev, CTL_RESET_DEVICE, 0);
291 if (err)
292 return err;
293 count = ds_recv_status_nodump(dev, st, buf, sizeof(buf));
294 if (count < 0)
295 return err;
296 }
297 #if 0
298 if (st->status & ST_IDLE) {
299 printk(KERN_INFO "Resetting pulse after ST_IDLE.\n");
300 err = ds_start_pulse(dev, PULLUP_PULSE_DURATION);
301 if (err)
302 return err;
303 }
304 #endif
305
306 return err;
307 }
308
309 static int ds_recv_data(struct ds_device *dev, unsigned char *buf, int size)
310 {
311 int count, err;
312 struct ds_status st;
313
314 count = 0;
315 err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]),
316 buf, size, &count, 1000);
317 if (err < 0) {
318 printk(KERN_INFO "Clearing ep0x%x.\n", dev->ep[EP_DATA_IN]);
319 usb_clear_halt(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]));
320 ds_recv_status(dev, &st);
321 return err;
322 }
323
324 #if 0
325 {
326 int i;
327
328 printk("%s: count=%d: ", __func__, count);
329 for (i=0; i<count; ++i)
330 printk("%02x ", buf[i]);
331 printk("\n");
332 }
333 #endif
334 return count;
335 }
336
337 static int ds_send_data(struct ds_device *dev, unsigned char *buf, int len)
338 {
339 int count, err;
340
341 count = 0;
342 err = usb_bulk_msg(dev->udev, usb_sndbulkpipe(dev->udev, dev->ep[EP_DATA_OUT]), buf, len, &count, 1000);
343 if (err < 0) {
344 printk(KERN_ERR "Failed to read 1-wire data from 0x02: err=%d.\n", err);
345 return err;
346 }
347
348 return err;
349 }
350
351 #if 0
352
353 int ds_stop_pulse(struct ds_device *dev, int limit)
354 {
355 struct ds_status st;
356 int count = 0, err = 0;
357 u8 buf[0x20];
358
359 do {
360 err = ds_send_control(dev, CTL_HALT_EXE_IDLE, 0);
361 if (err)
362 break;
363 err = ds_send_control(dev, CTL_RESUME_EXE, 0);
364 if (err)
365 break;
366 err = ds_recv_status_nodump(dev, &st, buf, sizeof(buf));
367 if (err)
368 break;
369
370 if ((st.status & ST_SPUA) == 0) {
371 err = ds_send_control_mode(dev, MOD_PULSE_EN, 0);
372 if (err)
373 break;
374 }
375 } while(++count < limit);
376
377 return err;
378 }
379
380 int ds_detect(struct ds_device *dev, struct ds_status *st)
381 {
382 int err;
383
384 err = ds_send_control_cmd(dev, CTL_RESET_DEVICE, 0);
385 if (err)
386 return err;
387
388 err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM, 0);
389 if (err)
390 return err;
391
392 err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM | COMM_TYPE, 0x40);
393 if (err)
394 return err;
395
396 err = ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_PROG);
397 if (err)
398 return err;
399
400 err = ds_recv_status(dev, st);
401
402 return err;
403 }
404
405 #endif /* 0 */
406
407 static int ds_wait_status(struct ds_device *dev, struct ds_status *st)
408 {
409 u8 buf[0x20];
410 int err, count = 0;
411
412 do {
413 err = ds_recv_status_nodump(dev, st, buf, sizeof(buf));
414 #if 0
415 if (err >= 0) {
416 int i;
417 printk("0x%x: count=%d, status: ", dev->ep[EP_STATUS], err);
418 for (i=0; i<err; ++i)
419 printk("%02x ", buf[i]);
420 printk("\n");
421 }
422 #endif
423 } while(!(buf[0x08] & 0x20) && !(err < 0) && ++count < 100);
424
425
426 if (((err > 16) && (buf[0x10] & 0x01)) || count >= 100 || err < 0) {
427 ds_recv_status(dev, st);
428 return -1;
429 } else
430 return 0;
431 }
432
433 static int ds_reset(struct ds_device *dev, struct ds_status *st)
434 {
435 int err;
436
437 //err = ds_send_control(dev, COMM_1_WIRE_RESET | COMM_F | COMM_IM | COMM_SE, SPEED_FLEXIBLE);
438 err = ds_send_control(dev, 0x43, SPEED_NORMAL);
439 if (err)
440 return err;
441
442 ds_wait_status(dev, st);
443 #if 0
444 if (st->command_buffer_status) {
445 printk(KERN_INFO "Short circuit.\n");
446 return -EIO;
447 }
448 #endif
449
450 return 0;
451 }
452
453 #if 0
454 static int ds_set_speed(struct ds_device *dev, int speed)
455 {
456 int err;
457
458 if (speed != SPEED_NORMAL && speed != SPEED_FLEXIBLE && speed != SPEED_OVERDRIVE)
459 return -EINVAL;
460
461 if (speed != SPEED_OVERDRIVE)
462 speed = SPEED_FLEXIBLE;
463
464 speed &= 0xff;
465
466 err = ds_send_control_mode(dev, MOD_1WIRE_SPEED, speed);
467 if (err)
468 return err;
469
470 return err;
471 }
472 #endif /* 0 */
473
474 static int ds_start_pulse(struct ds_device *dev, int delay)
475 {
476 int err;
477 u8 del = 1 + (u8)(delay >> 4);
478 struct ds_status st;
479
480 #if 0
481 err = ds_stop_pulse(dev, 10);
482 if (err)
483 return err;
484
485 err = ds_send_control_mode(dev, MOD_PULSE_EN, PULSE_SPUE);
486 if (err)
487 return err;
488 #endif
489 err = ds_send_control(dev, COMM_SET_DURATION | COMM_IM, del);
490 if (err)
491 return err;
492
493 err = ds_send_control(dev, COMM_PULSE | COMM_IM | COMM_F, 0);
494 if (err)
495 return err;
496
497 mdelay(delay);
498
499 ds_wait_status(dev, &st);
500
501 return err;
502 }
503
504 static int ds_touch_bit(struct ds_device *dev, u8 bit, u8 *tbit)
505 {
506 int err, count;
507 struct ds_status st;
508 u16 value = (COMM_BIT_IO | COMM_IM) | ((bit) ? COMM_D : 0);
509 u16 cmd;
510
511 err = ds_send_control(dev, value, 0);
512 if (err)
513 return err;
514
515 count = 0;
516 do {
517 err = ds_wait_status(dev, &st);
518 if (err)
519 return err;
520
521 cmd = st.command0 | (st.command1 << 8);
522 } while (cmd != value && ++count < 10);
523
524 if (err < 0 || count >= 10) {
525 printk(KERN_ERR "Failed to obtain status.\n");
526 return -EINVAL;
527 }
528
529 err = ds_recv_data(dev, tbit, sizeof(*tbit));
530 if (err < 0)
531 return err;
532
533 return 0;
534 }
535
536 static int ds_write_bit(struct ds_device *dev, u8 bit)
537 {
538 int err;
539 struct ds_status st;
540
541 err = ds_send_control(dev, COMM_BIT_IO | COMM_IM | (bit) ? COMM_D : 0, 0);
542 if (err)
543 return err;
544
545 ds_wait_status(dev, &st);
546
547 return 0;
548 }
549
550 static int ds_write_byte(struct ds_device *dev, u8 byte)
551 {
552 int err;
553 struct ds_status st;
554 u8 rbyte;
555
556 err = ds_send_control(dev, COMM_BYTE_IO | COMM_IM | COMM_SPU, byte);
557 if (err)
558 return err;
559
560 err = ds_wait_status(dev, &st);
561 if (err)
562 return err;
563
564 err = ds_recv_data(dev, &rbyte, sizeof(rbyte));
565 if (err < 0)
566 return err;
567
568 ds_start_pulse(dev, PULLUP_PULSE_DURATION);
569
570 return !(byte == rbyte);
571 }
572
573 static int ds_read_byte(struct ds_device *dev, u8 *byte)
574 {
575 int err;
576 struct ds_status st;
577
578 err = ds_send_control(dev, COMM_BYTE_IO | COMM_IM , 0xff);
579 if (err)
580 return err;
581
582 ds_wait_status(dev, &st);
583
584 err = ds_recv_data(dev, byte, sizeof(*byte));
585 if (err < 0)
586 return err;
587
588 return 0;
589 }
590
591 static int ds_read_block(struct ds_device *dev, u8 *buf, int len)
592 {
593 struct ds_status st;
594 int err;
595
596 if (len > 64*1024)
597 return -E2BIG;
598
599 memset(buf, 0xFF, len);
600
601 err = ds_send_data(dev, buf, len);
602 if (err < 0)
603 return err;
604
605 err = ds_send_control(dev, COMM_BLOCK_IO | COMM_IM | COMM_SPU, len);
606 if (err)
607 return err;
608
609 ds_wait_status(dev, &st);
610
611 memset(buf, 0x00, len);
612 err = ds_recv_data(dev, buf, len);
613
614 return err;
615 }
616
617 static int ds_write_block(struct ds_device *dev, u8 *buf, int len)
618 {
619 int err;
620 struct ds_status st;
621
622 err = ds_send_data(dev, buf, len);
623 if (err < 0)
624 return err;
625
626 ds_wait_status(dev, &st);
627
628 err = ds_send_control(dev, COMM_BLOCK_IO | COMM_IM | COMM_SPU, len);
629 if (err)
630 return err;
631
632 ds_wait_status(dev, &st);
633
634 err = ds_recv_data(dev, buf, len);
635 if (err < 0)
636 return err;
637
638 ds_start_pulse(dev, PULLUP_PULSE_DURATION);
639
640 return !(err == len);
641 }
642
643 #if 0
644
645 static int ds_search(struct ds_device *dev, u64 init, u64 *buf, u8 id_number, int conditional_search)
646 {
647 int err;
648 u16 value, index;
649 struct ds_status st;
650
651 memset(buf, 0, sizeof(buf));
652
653 err = ds_send_data(ds_dev, (unsigned char *)&init, 8);
654 if (err)
655 return err;
656
657 ds_wait_status(ds_dev, &st);
658
659 value = COMM_SEARCH_ACCESS | COMM_IM | COMM_SM | COMM_F | COMM_RTS;
660 index = (conditional_search ? 0xEC : 0xF0) | (id_number << 8);
661 err = ds_send_control(ds_dev, value, index);
662 if (err)
663 return err;
664
665 ds_wait_status(ds_dev, &st);
666
667 err = ds_recv_data(ds_dev, (unsigned char *)buf, 8*id_number);
668 if (err < 0)
669 return err;
670
671 return err/8;
672 }
673
674 static int ds_match_access(struct ds_device *dev, u64 init)
675 {
676 int err;
677 struct ds_status st;
678
679 err = ds_send_data(dev, (unsigned char *)&init, sizeof(init));
680 if (err)
681 return err;
682
683 ds_wait_status(dev, &st);
684
685 err = ds_send_control(dev, COMM_MATCH_ACCESS | COMM_IM | COMM_RST, 0x0055);
686 if (err)
687 return err;
688
689 ds_wait_status(dev, &st);
690
691 return 0;
692 }
693
694 static int ds_set_path(struct ds_device *dev, u64 init)
695 {
696 int err;
697 struct ds_status st;
698 u8 buf[9];
699
700 memcpy(buf, &init, 8);
701 buf[8] = BRANCH_MAIN;
702
703 err = ds_send_data(dev, buf, sizeof(buf));
704 if (err)
705 return err;
706
707 ds_wait_status(dev, &st);
708
709 err = ds_send_control(dev, COMM_SET_PATH | COMM_IM | COMM_RST, 0);
710 if (err)
711 return err;
712
713 ds_wait_status(dev, &st);
714
715 return 0;
716 }
717
718 #endif /* 0 */
719
720 static u8 ds9490r_touch_bit(void *data, u8 bit)
721 {
722 u8 ret;
723 struct ds_device *dev = data;
724
725 if (ds_touch_bit(dev, bit, &ret))
726 return 0;
727
728 return ret;
729 }
730
731 static void ds9490r_write_bit(void *data, u8 bit)
732 {
733 struct ds_device *dev = data;
734
735 ds_write_bit(dev, bit);
736 }
737
738 static void ds9490r_write_byte(void *data, u8 byte)
739 {
740 struct ds_device *dev = data;
741
742 ds_write_byte(dev, byte);
743 }
744
745 static u8 ds9490r_read_bit(void *data)
746 {
747 struct ds_device *dev = data;
748 int err;
749 u8 bit = 0;
750
751 err = ds_touch_bit(dev, 1, &bit);
752 if (err)
753 return 0;
754
755 return bit & 1;
756 }
757
758 static u8 ds9490r_read_byte(void *data)
759 {
760 struct ds_device *dev = data;
761 int err;
762 u8 byte = 0;
763
764 err = ds_read_byte(dev, &byte);
765 if (err)
766 return 0;
767
768 return byte;
769 }
770
771 static void ds9490r_write_block(void *data, const u8 *buf, int len)
772 {
773 struct ds_device *dev = data;
774
775 ds_write_block(dev, (u8 *)buf, len);
776 }
777
778 static u8 ds9490r_read_block(void *data, u8 *buf, int len)
779 {
780 struct ds_device *dev = data;
781 int err;
782
783 err = ds_read_block(dev, buf, len);
784 if (err < 0)
785 return 0;
786
787 return len;
788 }
789
790 static u8 ds9490r_reset(void *data)
791 {
792 struct ds_device *dev = data;
793 struct ds_status st;
794 int err;
795
796 memset(&st, 0, sizeof(st));
797
798 err = ds_reset(dev, &st);
799 if (err)
800 return 1;
801
802 return 0;
803 }
804
805 static int ds_w1_init(struct ds_device *dev)
806 {
807 memset(&dev->master, 0, sizeof(struct w1_bus_master));
808
809 dev->master.data = dev;
810 dev->master.touch_bit = &ds9490r_touch_bit;
811 dev->master.read_bit = &ds9490r_read_bit;
812 dev->master.write_bit = &ds9490r_write_bit;
813 dev->master.read_byte = &ds9490r_read_byte;
814 dev->master.write_byte = &ds9490r_write_byte;
815 dev->master.read_block = &ds9490r_read_block;
816 dev->master.write_block = &ds9490r_write_block;
817 dev->master.reset_bus = &ds9490r_reset;
818
819 return w1_add_master_device(&dev->master);
820 }
821
822 static void ds_w1_fini(struct ds_device *dev)
823 {
824 w1_remove_master_device(&dev->master);
825 }
826
827 static int ds_probe(struct usb_interface *intf,
828 const struct usb_device_id *udev_id)
829 {
830 struct usb_device *udev = interface_to_usbdev(intf);
831 struct usb_endpoint_descriptor *endpoint;
832 struct usb_host_interface *iface_desc;
833 struct ds_device *dev;
834 int i, err;
835
836 dev = kmalloc(sizeof(struct ds_device), GFP_KERNEL);
837 if (!dev) {
838 printk(KERN_INFO "Failed to allocate new DS9490R structure.\n");
839 return -ENOMEM;
840 }
841 dev->udev = usb_get_dev(udev);
842 if (!dev->udev) {
843 err = -ENOMEM;
844 goto err_out_free;
845 }
846 memset(dev->ep, 0, sizeof(dev->ep));
847
848 usb_set_intfdata(intf, dev);
849
850 err = usb_set_interface(dev->udev, intf->altsetting[0].desc.bInterfaceNumber, 3);
851 if (err) {
852 printk(KERN_ERR "Failed to set alternative setting 3 for %d interface: err=%d.\n",
853 intf->altsetting[0].desc.bInterfaceNumber, err);
854 goto err_out_clear;
855 }
856
857 err = usb_reset_configuration(dev->udev);
858 if (err) {
859 printk(KERN_ERR "Failed to reset configuration: err=%d.\n", err);
860 goto err_out_clear;
861 }
862
863 iface_desc = &intf->altsetting[0];
864 if (iface_desc->desc.bNumEndpoints != NUM_EP-1) {
865 printk(KERN_INFO "Num endpoints=%d. It is not DS9490R.\n", iface_desc->desc.bNumEndpoints);
866 err = -EINVAL;
867 goto err_out_clear;
868 }
869
870 /*
871 * This loop doesn'd show control 0 endpoint,
872 * so we will fill only 1-3 endpoints entry.
873 */
874 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
875 endpoint = &iface_desc->endpoint[i].desc;
876
877 dev->ep[i+1] = endpoint->bEndpointAddress;
878 #if 0
879 printk("%d: addr=%x, size=%d, dir=%s, type=%x\n",
880 i, endpoint->bEndpointAddress, le16_to_cpu(endpoint->wMaxPacketSize),
881 (endpoint->bEndpointAddress & USB_DIR_IN)?"IN":"OUT",
882 endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
883 #endif
884 }
885
886 err = ds_w1_init(dev);
887 if (err)
888 goto err_out_clear;
889
890 mutex_lock(&ds_mutex);
891 list_add_tail(&dev->ds_entry, &ds_devices);
892 mutex_unlock(&ds_mutex);
893
894 return 0;
895
896 err_out_clear:
897 usb_set_intfdata(intf, NULL);
898 usb_put_dev(dev->udev);
899 err_out_free:
900 kfree(dev);
901 return err;
902 }
903
904 static void ds_disconnect(struct usb_interface *intf)
905 {
906 struct ds_device *dev;
907
908 dev = usb_get_intfdata(intf);
909 if (!dev)
910 return;
911
912 mutex_lock(&ds_mutex);
913 list_del(&dev->ds_entry);
914 mutex_unlock(&ds_mutex);
915
916 ds_w1_fini(dev);
917
918 usb_set_intfdata(intf, NULL);
919
920 usb_put_dev(dev->udev);
921 kfree(dev);
922 }
923
924 static int ds_init(void)
925 {
926 int err;
927
928 err = usb_register(&ds_driver);
929 if (err) {
930 printk(KERN_INFO "Failed to register DS9490R USB device: err=%d.\n", err);
931 return err;
932 }
933
934 return 0;
935 }
936
937 static void ds_fini(void)
938 {
939 usb_deregister(&ds_driver);
940 }
941
942 module_init(ds_init);
943 module_exit(ds_fini);
944
945 MODULE_LICENSE("GPL");
946 MODULE_AUTHOR("Evgeniy Polyakov <johnpol@2ka.mipt.ru>");
947 MODULE_DESCRIPTION("DS2490 USB <-> W1 bus master driver (DS9490*)");
948
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