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HID: remove hid-ff
[deliverable/linux.git] / drivers / hid / usbhid / hid-core.c
1 /*
2 * USB HID support for Linux
3 *
4 * Copyright (c) 1999 Andreas Gal
5 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
6 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
7 * Copyright (c) 2006-2007 Jiri Kosina
8 */
9
10 /*
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the Free
13 * Software Foundation; either version 2 of the License, or (at your option)
14 * any later version.
15 */
16
17 #include <linux/module.h>
18 #include <linux/slab.h>
19 #include <linux/init.h>
20 #include <linux/kernel.h>
21 #include <linux/list.h>
22 #include <linux/mm.h>
23 #include <linux/smp_lock.h>
24 #include <linux/spinlock.h>
25 #include <asm/unaligned.h>
26 #include <asm/byteorder.h>
27 #include <linux/input.h>
28 #include <linux/wait.h>
29
30 #include <linux/usb.h>
31
32 #include <linux/hid.h>
33 #include <linux/hiddev.h>
34 #include <linux/hid-debug.h>
35 #include <linux/hidraw.h>
36 #include "usbhid.h"
37
38 /*
39 * Version Information
40 */
41
42 #define DRIVER_VERSION "v2.6"
43 #define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik, Jiri Kosina"
44 #define DRIVER_DESC "USB HID core driver"
45 #define DRIVER_LICENSE "GPL"
46
47 /*
48 * Module parameters.
49 */
50
51 static unsigned int hid_mousepoll_interval;
52 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
53 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
54
55 /* Quirks specified at module load time */
56 static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
57 module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
58 MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
59 " quirks=vendorID:productID:quirks"
60 " where vendorID, productID, and quirks are all in"
61 " 0x-prefixed hex");
62 /*
63 * Input submission and I/O error handler.
64 */
65
66 static void hid_io_error(struct hid_device *hid);
67
68 /* Start up the input URB */
69 static int hid_start_in(struct hid_device *hid)
70 {
71 unsigned long flags;
72 int rc = 0;
73 struct usbhid_device *usbhid = hid->driver_data;
74
75 spin_lock_irqsave(&usbhid->inlock, flags);
76 if (hid->open > 0 && !test_bit(HID_SUSPENDED, &usbhid->iofl) &&
77 !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
78 !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
79 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
80 if (rc != 0)
81 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
82 }
83 spin_unlock_irqrestore(&usbhid->inlock, flags);
84 return rc;
85 }
86
87 /* I/O retry timer routine */
88 static void hid_retry_timeout(unsigned long _hid)
89 {
90 struct hid_device *hid = (struct hid_device *) _hid;
91 struct usbhid_device *usbhid = hid->driver_data;
92
93 dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
94 if (hid_start_in(hid))
95 hid_io_error(hid);
96 }
97
98 /* Workqueue routine to reset the device or clear a halt */
99 static void hid_reset(struct work_struct *work)
100 {
101 struct usbhid_device *usbhid =
102 container_of(work, struct usbhid_device, reset_work);
103 struct hid_device *hid = usbhid->hid;
104 int rc_lock, rc = 0;
105
106 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
107 dev_dbg(&usbhid->intf->dev, "clear halt\n");
108 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
109 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
110 hid_start_in(hid);
111 }
112
113 else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
114 dev_dbg(&usbhid->intf->dev, "resetting device\n");
115 rc = rc_lock = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
116 if (rc_lock >= 0) {
117 rc = usb_reset_device(hid_to_usb_dev(hid));
118 if (rc_lock)
119 usb_unlock_device(hid_to_usb_dev(hid));
120 }
121 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
122 }
123
124 switch (rc) {
125 case 0:
126 if (!test_bit(HID_IN_RUNNING, &usbhid->iofl))
127 hid_io_error(hid);
128 break;
129 default:
130 err_hid("can't reset device, %s-%s/input%d, status %d",
131 hid_to_usb_dev(hid)->bus->bus_name,
132 hid_to_usb_dev(hid)->devpath,
133 usbhid->ifnum, rc);
134 /* FALLTHROUGH */
135 case -EHOSTUNREACH:
136 case -ENODEV:
137 case -EINTR:
138 break;
139 }
140 }
141
142 /* Main I/O error handler */
143 static void hid_io_error(struct hid_device *hid)
144 {
145 unsigned long flags;
146 struct usbhid_device *usbhid = hid->driver_data;
147
148 spin_lock_irqsave(&usbhid->inlock, flags);
149
150 /* Stop when disconnected */
151 if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
152 goto done;
153
154 /* If it has been a while since the last error, we'll assume
155 * this a brand new error and reset the retry timeout. */
156 if (time_after(jiffies, usbhid->stop_retry + HZ/2))
157 usbhid->retry_delay = 0;
158
159 /* When an error occurs, retry at increasing intervals */
160 if (usbhid->retry_delay == 0) {
161 usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */
162 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
163 } else if (usbhid->retry_delay < 100)
164 usbhid->retry_delay *= 2;
165
166 if (time_after(jiffies, usbhid->stop_retry)) {
167
168 /* Retries failed, so do a port reset */
169 if (!test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
170 schedule_work(&usbhid->reset_work);
171 goto done;
172 }
173 }
174
175 mod_timer(&usbhid->io_retry,
176 jiffies + msecs_to_jiffies(usbhid->retry_delay));
177 done:
178 spin_unlock_irqrestore(&usbhid->inlock, flags);
179 }
180
181 /*
182 * Input interrupt completion handler.
183 */
184
185 static void hid_irq_in(struct urb *urb)
186 {
187 struct hid_device *hid = urb->context;
188 struct usbhid_device *usbhid = hid->driver_data;
189 int status;
190
191 switch (urb->status) {
192 case 0: /* success */
193 usbhid->retry_delay = 0;
194 hid_input_report(urb->context, HID_INPUT_REPORT,
195 urb->transfer_buffer,
196 urb->actual_length, 1);
197 break;
198 case -EPIPE: /* stall */
199 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
200 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
201 schedule_work(&usbhid->reset_work);
202 return;
203 case -ECONNRESET: /* unlink */
204 case -ENOENT:
205 case -ESHUTDOWN: /* unplug */
206 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
207 return;
208 case -EILSEQ: /* protocol error or unplug */
209 case -EPROTO: /* protocol error or unplug */
210 case -ETIME: /* protocol error or unplug */
211 case -ETIMEDOUT: /* Should never happen, but... */
212 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
213 hid_io_error(hid);
214 return;
215 default: /* error */
216 warn("input irq status %d received", urb->status);
217 }
218
219 status = usb_submit_urb(urb, GFP_ATOMIC);
220 if (status) {
221 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
222 if (status != -EPERM) {
223 err_hid("can't resubmit intr, %s-%s/input%d, status %d",
224 hid_to_usb_dev(hid)->bus->bus_name,
225 hid_to_usb_dev(hid)->devpath,
226 usbhid->ifnum, status);
227 hid_io_error(hid);
228 }
229 }
230 }
231
232 static int hid_submit_out(struct hid_device *hid)
233 {
234 struct hid_report *report;
235 struct usbhid_device *usbhid = hid->driver_data;
236
237 report = usbhid->out[usbhid->outtail];
238
239 hid_output_report(report, usbhid->outbuf);
240 usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
241 usbhid->urbout->dev = hid_to_usb_dev(hid);
242
243 dbg_hid("submitting out urb\n");
244
245 if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) {
246 err_hid("usb_submit_urb(out) failed");
247 return -1;
248 }
249
250 return 0;
251 }
252
253 static int hid_submit_ctrl(struct hid_device *hid)
254 {
255 struct hid_report *report;
256 unsigned char dir;
257 int len;
258 struct usbhid_device *usbhid = hid->driver_data;
259
260 report = usbhid->ctrl[usbhid->ctrltail].report;
261 dir = usbhid->ctrl[usbhid->ctrltail].dir;
262
263 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
264 if (dir == USB_DIR_OUT) {
265 hid_output_report(report, usbhid->ctrlbuf);
266 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
267 usbhid->urbctrl->transfer_buffer_length = len;
268 } else {
269 int maxpacket, padlen;
270
271 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
272 maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0);
273 if (maxpacket > 0) {
274 padlen = DIV_ROUND_UP(len, maxpacket);
275 padlen *= maxpacket;
276 if (padlen > usbhid->bufsize)
277 padlen = usbhid->bufsize;
278 } else
279 padlen = 0;
280 usbhid->urbctrl->transfer_buffer_length = padlen;
281 }
282 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
283
284 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
285 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
286 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
287 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
288 usbhid->cr->wLength = cpu_to_le16(len);
289
290 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
291 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
292 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
293
294 if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
295 err_hid("usb_submit_urb(ctrl) failed");
296 return -1;
297 }
298
299 return 0;
300 }
301
302 /*
303 * Output interrupt completion handler.
304 */
305
306 static void hid_irq_out(struct urb *urb)
307 {
308 struct hid_device *hid = urb->context;
309 struct usbhid_device *usbhid = hid->driver_data;
310 unsigned long flags;
311 int unplug = 0;
312
313 switch (urb->status) {
314 case 0: /* success */
315 break;
316 case -ESHUTDOWN: /* unplug */
317 unplug = 1;
318 case -EILSEQ: /* protocol error or unplug */
319 case -EPROTO: /* protocol error or unplug */
320 case -ECONNRESET: /* unlink */
321 case -ENOENT:
322 break;
323 default: /* error */
324 warn("output irq status %d received", urb->status);
325 }
326
327 spin_lock_irqsave(&usbhid->outlock, flags);
328
329 if (unplug)
330 usbhid->outtail = usbhid->outhead;
331 else
332 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
333
334 if (usbhid->outhead != usbhid->outtail) {
335 if (hid_submit_out(hid)) {
336 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
337 wake_up(&usbhid->wait);
338 }
339 spin_unlock_irqrestore(&usbhid->outlock, flags);
340 return;
341 }
342
343 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
344 spin_unlock_irqrestore(&usbhid->outlock, flags);
345 wake_up(&usbhid->wait);
346 }
347
348 /*
349 * Control pipe completion handler.
350 */
351
352 static void hid_ctrl(struct urb *urb)
353 {
354 struct hid_device *hid = urb->context;
355 struct usbhid_device *usbhid = hid->driver_data;
356 unsigned long flags;
357 int unplug = 0;
358
359 spin_lock_irqsave(&usbhid->ctrllock, flags);
360
361 switch (urb->status) {
362 case 0: /* success */
363 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
364 hid_input_report(urb->context,
365 usbhid->ctrl[usbhid->ctrltail].report->type,
366 urb->transfer_buffer, urb->actual_length, 0);
367 break;
368 case -ESHUTDOWN: /* unplug */
369 unplug = 1;
370 case -EILSEQ: /* protocol error or unplug */
371 case -EPROTO: /* protocol error or unplug */
372 case -ECONNRESET: /* unlink */
373 case -ENOENT:
374 case -EPIPE: /* report not available */
375 break;
376 default: /* error */
377 warn("ctrl urb status %d received", urb->status);
378 }
379
380 if (unplug)
381 usbhid->ctrltail = usbhid->ctrlhead;
382 else
383 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
384
385 if (usbhid->ctrlhead != usbhid->ctrltail) {
386 if (hid_submit_ctrl(hid)) {
387 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
388 wake_up(&usbhid->wait);
389 }
390 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
391 return;
392 }
393
394 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
395 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
396 wake_up(&usbhid->wait);
397 }
398
399 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
400 {
401 int head;
402 unsigned long flags;
403 struct usbhid_device *usbhid = hid->driver_data;
404
405 if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
406 return;
407
408 if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
409
410 spin_lock_irqsave(&usbhid->outlock, flags);
411
412 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
413 spin_unlock_irqrestore(&usbhid->outlock, flags);
414 warn("output queue full");
415 return;
416 }
417
418 usbhid->out[usbhid->outhead] = report;
419 usbhid->outhead = head;
420
421 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl))
422 if (hid_submit_out(hid))
423 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
424
425 spin_unlock_irqrestore(&usbhid->outlock, flags);
426 return;
427 }
428
429 spin_lock_irqsave(&usbhid->ctrllock, flags);
430
431 if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
432 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
433 warn("control queue full");
434 return;
435 }
436
437 usbhid->ctrl[usbhid->ctrlhead].report = report;
438 usbhid->ctrl[usbhid->ctrlhead].dir = dir;
439 usbhid->ctrlhead = head;
440
441 if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl))
442 if (hid_submit_ctrl(hid))
443 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
444
445 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
446 }
447 EXPORT_SYMBOL_GPL(usbhid_submit_report);
448
449 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
450 {
451 struct hid_device *hid = input_get_drvdata(dev);
452 struct hid_field *field;
453 int offset;
454
455 if (type == EV_FF)
456 return input_ff_event(dev, type, code, value);
457
458 if (type != EV_LED)
459 return -1;
460
461 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
462 warn("event field not found");
463 return -1;
464 }
465
466 hid_set_field(field, offset, value);
467 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
468
469 return 0;
470 }
471
472 int usbhid_wait_io(struct hid_device *hid)
473 {
474 struct usbhid_device *usbhid = hid->driver_data;
475
476 if (!wait_event_timeout(usbhid->wait,
477 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
478 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
479 10*HZ)) {
480 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
481 return -1;
482 }
483
484 return 0;
485 }
486
487 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
488 {
489 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
490 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
491 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
492 }
493
494 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
495 unsigned char type, void *buf, int size)
496 {
497 int result, retries = 4;
498
499 memset(buf, 0, size);
500
501 do {
502 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
503 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
504 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
505 retries--;
506 } while (result < size && retries);
507 return result;
508 }
509
510 int usbhid_open(struct hid_device *hid)
511 {
512 struct usbhid_device *usbhid = hid->driver_data;
513 int res;
514
515 if (!hid->open++) {
516 res = usb_autopm_get_interface(usbhid->intf);
517 if (res < 0) {
518 hid->open--;
519 return -EIO;
520 }
521 }
522 if (hid_start_in(hid))
523 hid_io_error(hid);
524 return 0;
525 }
526
527 void usbhid_close(struct hid_device *hid)
528 {
529 struct usbhid_device *usbhid = hid->driver_data;
530
531 if (!--hid->open) {
532 usb_kill_urb(usbhid->urbin);
533 usb_autopm_put_interface(usbhid->intf);
534 }
535 }
536
537 /*
538 * Initialize all reports
539 */
540
541 void usbhid_init_reports(struct hid_device *hid)
542 {
543 struct hid_report *report;
544 struct usbhid_device *usbhid = hid->driver_data;
545 int err, ret;
546
547 list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
548 usbhid_submit_report(hid, report, USB_DIR_IN);
549
550 list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
551 usbhid_submit_report(hid, report, USB_DIR_IN);
552
553 err = 0;
554 ret = usbhid_wait_io(hid);
555 while (ret) {
556 err |= ret;
557 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
558 usb_kill_urb(usbhid->urbctrl);
559 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
560 usb_kill_urb(usbhid->urbout);
561 ret = usbhid_wait_io(hid);
562 }
563
564 if (err)
565 warn("timeout initializing reports");
566 }
567
568 /*
569 * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
570 */
571 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
572 unsigned int hid_code, struct hid_field **pfield)
573 {
574 struct hid_report *report;
575 struct hid_field *field;
576 struct hid_usage *usage;
577 int i, j;
578
579 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
580 for (i = 0; i < report->maxfield; i++) {
581 field = report->field[i];
582 for (j = 0; j < field->maxusage; j++) {
583 usage = &field->usage[j];
584 if ((usage->hid & HID_USAGE_PAGE) == page &&
585 (usage->hid & 0xFFFF) == hid_code) {
586 *pfield = field;
587 return j;
588 }
589 }
590 }
591 }
592 return -1;
593 }
594
595 void usbhid_set_leds(struct hid_device *hid)
596 {
597 struct hid_field *field;
598 int offset;
599
600 if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
601 hid_set_field(field, offset, 0);
602 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
603 }
604 }
605 EXPORT_SYMBOL_GPL(usbhid_set_leds);
606
607 /*
608 * Traverse the supplied list of reports and find the longest
609 */
610 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
611 unsigned int *max)
612 {
613 struct hid_report *report;
614 unsigned int size;
615
616 list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
617 size = ((report->size - 1) >> 3) + 1;
618 if (type == HID_INPUT_REPORT && hid->report_enum[type].numbered)
619 size++;
620 if (*max < size)
621 *max = size;
622 }
623 }
624
625 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
626 {
627 struct usbhid_device *usbhid = hid->driver_data;
628
629 if (!(usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->inbuf_dma)))
630 return -1;
631 if (!(usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->outbuf_dma)))
632 return -1;
633 if (!(usbhid->cr = usb_buffer_alloc(dev, sizeof(*(usbhid->cr)), GFP_ATOMIC, &usbhid->cr_dma)))
634 return -1;
635 if (!(usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->ctrlbuf_dma)))
636 return -1;
637
638 return 0;
639 }
640
641 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count)
642 {
643 struct usbhid_device *usbhid = hid->driver_data;
644 struct usb_device *dev = hid_to_usb_dev(hid);
645 struct usb_interface *intf = usbhid->intf;
646 struct usb_host_interface *interface = intf->cur_altsetting;
647 int ret;
648
649 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
650 HID_REQ_SET_REPORT,
651 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
652 ((HID_OUTPUT_REPORT + 1) << 8) | *buf,
653 interface->desc.bInterfaceNumber, buf + 1, count - 1,
654 USB_CTRL_SET_TIMEOUT);
655
656 /* count also the report id */
657 if (ret > 0)
658 ret++;
659
660 return ret;
661 }
662
663 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
664 {
665 struct usbhid_device *usbhid = hid->driver_data;
666
667 usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
668 usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
669 usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma);
670 usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
671 }
672
673 static int usbhid_parse(struct hid_device *hid)
674 {
675 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
676 struct usb_host_interface *interface = intf->cur_altsetting;
677 struct usb_device *dev = interface_to_usbdev (intf);
678 struct hid_descriptor *hdesc;
679 u32 quirks = 0;
680 unsigned int rsize = 0;
681 char *rdesc;
682 int ret, n;
683
684 quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
685 le16_to_cpu(dev->descriptor.idProduct));
686
687 /* Many keyboards and mice don't like to be polled for reports,
688 * so we will always set the HID_QUIRK_NOGET flag for them. */
689 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
690 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
691 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
692 quirks |= HID_QUIRK_NOGET;
693 }
694
695 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
696 (!interface->desc.bNumEndpoints ||
697 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
698 dbg_hid("class descriptor not present\n");
699 return -ENODEV;
700 }
701
702 hid->version = le16_to_cpu(hdesc->bcdHID);
703 hid->country = hdesc->bCountryCode;
704
705 for (n = 0; n < hdesc->bNumDescriptors; n++)
706 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
707 rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
708
709 if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
710 dbg_hid("weird size of report descriptor (%u)\n", rsize);
711 return -EINVAL;
712 }
713
714 if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
715 dbg_hid("couldn't allocate rdesc memory\n");
716 return -ENOMEM;
717 }
718
719 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
720
721 ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
722 HID_DT_REPORT, rdesc, rsize);
723 if (ret < 0) {
724 dbg_hid("reading report descriptor failed\n");
725 kfree(rdesc);
726 goto err;
727 }
728
729 dbg_hid("report descriptor (size %u, read %d) = ", rsize, n);
730 for (n = 0; n < rsize; n++)
731 dbg_hid_line(" %02x", (unsigned char) rdesc[n]);
732 dbg_hid_line("\n");
733
734 ret = hid_parse_report(hid, rdesc, rsize);
735 kfree(rdesc);
736 if (ret) {
737 dbg_hid("parsing report descriptor failed\n");
738 goto err;
739 }
740
741 hid->quirks = quirks;
742
743 return 0;
744 err:
745 return ret;
746 }
747
748 static int usbhid_start(struct hid_device *hid)
749 {
750 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
751 struct usb_host_interface *interface = intf->cur_altsetting;
752 struct usb_device *dev = interface_to_usbdev(intf);
753 struct usbhid_device *usbhid;
754 unsigned int n, insize = 0;
755 int ret;
756
757 WARN_ON(hid->driver_data);
758
759 usbhid = kzalloc(sizeof(struct usbhid_device), GFP_KERNEL);
760 if (usbhid == NULL) {
761 ret = -ENOMEM;
762 goto err;
763 }
764
765 hid->driver_data = usbhid;
766 usbhid->hid = hid;
767
768 usbhid->bufsize = HID_MIN_BUFFER_SIZE;
769 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
770 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
771 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
772
773 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
774 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
775
776 hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
777
778 if (insize > HID_MAX_BUFFER_SIZE)
779 insize = HID_MAX_BUFFER_SIZE;
780
781 if (hid_alloc_buffers(dev, hid)) {
782 ret = -ENOMEM;
783 goto fail;
784 }
785
786 for (n = 0; n < interface->desc.bNumEndpoints; n++) {
787 struct usb_endpoint_descriptor *endpoint;
788 int pipe;
789 int interval;
790
791 endpoint = &interface->endpoint[n].desc;
792 if ((endpoint->bmAttributes & 3) != 3) /* Not an interrupt endpoint */
793 continue;
794
795 interval = endpoint->bInterval;
796
797 /* Some vendors give fullspeed interval on highspeed devides */
798 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
799 dev->speed == USB_SPEED_HIGH) {
800 interval = fls(endpoint->bInterval*8);
801 printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
802 hid->name, endpoint->bInterval, interval);
803 }
804
805 /* Change the polling interval of mice. */
806 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
807 interval = hid_mousepoll_interval;
808
809 ret = -ENOMEM;
810 if (usb_endpoint_dir_in(endpoint)) {
811 if (usbhid->urbin)
812 continue;
813 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
814 goto fail;
815 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
816 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
817 hid_irq_in, hid, interval);
818 usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
819 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
820 } else {
821 if (usbhid->urbout)
822 continue;
823 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
824 goto fail;
825 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
826 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
827 hid_irq_out, hid, interval);
828 usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
829 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
830 }
831 }
832
833 if (!usbhid->urbin) {
834 err_hid("couldn't find an input interrupt endpoint");
835 ret = -ENODEV;
836 goto fail;
837 }
838
839 init_waitqueue_head(&usbhid->wait);
840 INIT_WORK(&usbhid->reset_work, hid_reset);
841 setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
842
843 spin_lock_init(&usbhid->inlock);
844 spin_lock_init(&usbhid->outlock);
845 spin_lock_init(&usbhid->ctrllock);
846
847 usbhid->intf = intf;
848 usbhid->ifnum = interface->desc.bInterfaceNumber;
849
850 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
851 if (!usbhid->urbctrl) {
852 ret = -ENOMEM;
853 goto fail;
854 }
855
856 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
857 usbhid->ctrlbuf, 1, hid_ctrl, hid);
858 usbhid->urbctrl->setup_dma = usbhid->cr_dma;
859 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
860 usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
861
862 usbhid_init_reports(hid);
863 hid_dump_device(hid);
864
865 return 0;
866
867 fail:
868 usb_free_urb(usbhid->urbin);
869 usb_free_urb(usbhid->urbout);
870 usb_free_urb(usbhid->urbctrl);
871 hid_free_buffers(dev, hid);
872 kfree(usbhid);
873 err:
874 return ret;
875 }
876
877 static void usbhid_stop(struct hid_device *hid)
878 {
879 struct usbhid_device *usbhid = hid->driver_data;
880
881 if (WARN_ON(!usbhid))
882 return;
883
884 spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
885 set_bit(HID_DISCONNECTED, &usbhid->iofl);
886 spin_unlock_irq(&usbhid->inlock);
887 usb_kill_urb(usbhid->urbin);
888 usb_kill_urb(usbhid->urbout);
889 usb_kill_urb(usbhid->urbctrl);
890
891 del_timer_sync(&usbhid->io_retry);
892 cancel_work_sync(&usbhid->reset_work);
893
894 if (hid->claimed & HID_CLAIMED_INPUT)
895 hidinput_disconnect(hid);
896 if (hid->claimed & HID_CLAIMED_HIDDEV)
897 hiddev_disconnect(hid);
898 if (hid->claimed & HID_CLAIMED_HIDRAW)
899 hidraw_disconnect(hid);
900
901 hid->claimed = 0;
902
903 usb_free_urb(usbhid->urbin);
904 usb_free_urb(usbhid->urbctrl);
905 usb_free_urb(usbhid->urbout);
906
907 hid_free_buffers(hid_to_usb_dev(hid), hid);
908 kfree(usbhid);
909 hid->driver_data = NULL;
910 }
911
912 static struct hid_ll_driver usb_hid_driver = {
913 .parse = usbhid_parse,
914 .start = usbhid_start,
915 .stop = usbhid_stop,
916 .open = usbhid_open,
917 .close = usbhid_close,
918 .hidinput_input_event = usb_hidinput_input_event,
919 };
920
921 static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
922 {
923 struct usb_device *dev = interface_to_usbdev(intf);
924 struct hid_device *hid;
925 size_t len;
926 int ret;
927
928 dbg_hid("HID probe called for ifnum %d\n",
929 intf->altsetting->desc.bInterfaceNumber);
930
931 hid = hid_allocate_device();
932 if (IS_ERR(hid))
933 return PTR_ERR(hid);
934
935 usb_set_intfdata(intf, hid);
936 hid->ll_driver = &usb_hid_driver;
937 hid->hid_output_raw_report = usbhid_output_raw_report;
938 hid->ff_init = hid_pidff_init;
939 #ifdef CONFIG_USB_HIDDEV
940 hid->hiddev_connect = hiddev_connect;
941 hid->hiddev_hid_event = hiddev_hid_event;
942 hid->hiddev_report_event = hiddev_report_event;
943 #endif
944 hid->dev.parent = &intf->dev;
945 hid->bus = BUS_USB;
946 hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
947 hid->product = le16_to_cpu(dev->descriptor.idProduct);
948 hid->name[0] = 0;
949
950 if (dev->manufacturer)
951 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
952
953 if (dev->product) {
954 if (dev->manufacturer)
955 strlcat(hid->name, " ", sizeof(hid->name));
956 strlcat(hid->name, dev->product, sizeof(hid->name));
957 }
958
959 if (!strlen(hid->name))
960 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
961 le16_to_cpu(dev->descriptor.idVendor),
962 le16_to_cpu(dev->descriptor.idProduct));
963
964 usb_make_path(dev, hid->phys, sizeof(hid->phys));
965 strlcat(hid->phys, "/input", sizeof(hid->phys));
966 len = strlen(hid->phys);
967 if (len < sizeof(hid->phys) - 1)
968 snprintf(hid->phys + len, sizeof(hid->phys) - len,
969 "%d", intf->altsetting[0].desc.bInterfaceNumber);
970
971 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
972 hid->uniq[0] = 0;
973
974 ret = hid_add_device(hid);
975 if (ret) {
976 if (ret != -ENODEV)
977 dev_err(&intf->dev, "can't add hid device: %d\n", ret);
978 goto err;
979 }
980
981 return 0;
982 err:
983 hid_destroy_device(hid);
984 return ret;
985 }
986
987 static void hid_disconnect(struct usb_interface *intf)
988 {
989 struct hid_device *hid = usb_get_intfdata(intf);
990
991 if (WARN_ON(!hid))
992 return;
993
994 hid_destroy_device(hid);
995 }
996
997 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
998 {
999 struct hid_device *hid = usb_get_intfdata (intf);
1000 struct usbhid_device *usbhid = hid->driver_data;
1001
1002 spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
1003 set_bit(HID_SUSPENDED, &usbhid->iofl);
1004 spin_unlock_irq(&usbhid->inlock);
1005 del_timer(&usbhid->io_retry);
1006 usb_kill_urb(usbhid->urbin);
1007 dev_dbg(&intf->dev, "suspend\n");
1008 return 0;
1009 }
1010
1011 static int hid_resume(struct usb_interface *intf)
1012 {
1013 struct hid_device *hid = usb_get_intfdata (intf);
1014 struct usbhid_device *usbhid = hid->driver_data;
1015 int status;
1016
1017 clear_bit(HID_SUSPENDED, &usbhid->iofl);
1018 usbhid->retry_delay = 0;
1019 status = hid_start_in(hid);
1020 dev_dbg(&intf->dev, "resume status %d\n", status);
1021 return status;
1022 }
1023
1024 /* Treat USB reset pretty much the same as suspend/resume */
1025 static int hid_pre_reset(struct usb_interface *intf)
1026 {
1027 /* FIXME: What if the interface is already suspended? */
1028 hid_suspend(intf, PMSG_ON);
1029 return 0;
1030 }
1031
1032 /* Same routine used for post_reset and reset_resume */
1033 static int hid_post_reset(struct usb_interface *intf)
1034 {
1035 struct usb_device *dev = interface_to_usbdev (intf);
1036
1037 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1038 /* FIXME: Any more reinitialization needed? */
1039
1040 return hid_resume(intf);
1041 }
1042
1043 static struct usb_device_id hid_usb_ids [] = {
1044 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1045 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1046 { } /* Terminating entry */
1047 };
1048
1049 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1050
1051 static struct usb_driver hid_driver = {
1052 .name = "usbhid",
1053 .probe = hid_probe,
1054 .disconnect = hid_disconnect,
1055 .suspend = hid_suspend,
1056 .resume = hid_resume,
1057 .reset_resume = hid_post_reset,
1058 .pre_reset = hid_pre_reset,
1059 .post_reset = hid_post_reset,
1060 .id_table = hid_usb_ids,
1061 .supports_autosuspend = 1,
1062 };
1063
1064 static const struct hid_device_id hid_usb_table[] = {
1065 { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1066 { }
1067 };
1068
1069 static struct hid_driver hid_usb_driver = {
1070 .name = "generic-usb",
1071 .id_table = hid_usb_table,
1072 };
1073
1074 static int __init hid_init(void)
1075 {
1076 int retval;
1077 retval = hid_register_driver(&hid_usb_driver);
1078 if (retval)
1079 goto hid_register_fail;
1080 retval = usbhid_quirks_init(quirks_param);
1081 if (retval)
1082 goto usbhid_quirks_init_fail;
1083 retval = hiddev_init();
1084 if (retval)
1085 goto hiddev_init_fail;
1086 retval = usb_register(&hid_driver);
1087 if (retval)
1088 goto usb_register_fail;
1089 info(DRIVER_VERSION ":" DRIVER_DESC);
1090
1091 return 0;
1092 usb_register_fail:
1093 hiddev_exit();
1094 hiddev_init_fail:
1095 usbhid_quirks_exit();
1096 usbhid_quirks_init_fail:
1097 hid_unregister_driver(&hid_usb_driver);
1098 hid_register_fail:
1099 return retval;
1100 }
1101
1102 static void __exit hid_exit(void)
1103 {
1104 usb_deregister(&hid_driver);
1105 hiddev_exit();
1106 usbhid_quirks_exit();
1107 hid_unregister_driver(&hid_usb_driver);
1108 }
1109
1110 module_init(hid_init);
1111 module_exit(hid_exit);
1112
1113 MODULE_AUTHOR(DRIVER_AUTHOR);
1114 MODULE_DESCRIPTION(DRIVER_DESC);
1115 MODULE_LICENSE(DRIVER_LICENSE);
Linux kernel - Deliverables
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