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[NETFILTER]: nf_conntrack: export hash allocation/destruction functions
[linux-2.6/verdex.git] / drivers / hid / usbhid / hid-core.c
blob3afa4a5035b7128b6e84fdc835637bdb9c690b74
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 "usbhid.h"
36
37 /*
38 * Version Information
39 */
40
41 #define DRIVER_VERSION "v2.6"
42 #define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik, Jiri Kosina"
43 #define DRIVER_DESC "USB HID core driver"
44 #define DRIVER_LICENSE "GPL"
45
46 static char *hid_types[] = {"Device", "Pointer", "Mouse", "Device", "Joystick",
47 "Gamepad", "Keyboard", "Keypad", "Multi-Axis Controller"};
48 /*
49 * Module parameters.
50 */
51
52 static unsigned int hid_mousepoll_interval;
53 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
54 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
55
56 /* Quirks specified at module load time */
57 static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
58 module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
59 MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
60 " quirks=vendorID:productID:quirks"
61 " where vendorID, productID, and quirks are all in"
62 " 0x-prefixed hex");
63 static char *rdesc_quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
64 module_param_array_named(rdesc_quirks, rdesc_quirks_param, charp, NULL, 0444);
65 MODULE_PARM_DESC(rdesc_quirks, "Add/modify report descriptor quirks by specifying "
66 " rdesc_quirks=vendorID:productID:rdesc_quirks"
67 " where vendorID, productID, and rdesc_quirks are all in"
68 " 0x-prefixed hex");
69 /*
70 * Input submission and I/O error handler.
71 */
72
73 static void hid_io_error(struct hid_device *hid);
74
75 /* Start up the input URB */
76 static int hid_start_in(struct hid_device *hid)
77 {
78 unsigned long flags;
79 int rc = 0;
80 struct usbhid_device *usbhid = hid->driver_data;
81
82 spin_lock_irqsave(&usbhid->inlock, flags);
83 if (hid->open > 0 && !test_bit(HID_SUSPENDED, &usbhid->iofl) &&
84 !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
85 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
86 if (rc != 0)
87 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
88 }
89 spin_unlock_irqrestore(&usbhid->inlock, flags);
90 return rc;
91 }
92
93 /* I/O retry timer routine */
94 static void hid_retry_timeout(unsigned long _hid)
95 {
96 struct hid_device *hid = (struct hid_device *) _hid;
97 struct usbhid_device *usbhid = hid->driver_data;
98
99 dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
100 if (hid_start_in(hid))
101 hid_io_error(hid);
102 }
103
104 /* Workqueue routine to reset the device or clear a halt */
105 static void hid_reset(struct work_struct *work)
106 {
107 struct usbhid_device *usbhid =
108 container_of(work, struct usbhid_device, reset_work);
109 struct hid_device *hid = usbhid->hid;
110 int rc_lock, rc = 0;
111
112 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
113 dev_dbg(&usbhid->intf->dev, "clear halt\n");
114 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
115 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
116 hid_start_in(hid);
117 }
118
119 else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
120 dev_dbg(&usbhid->intf->dev, "resetting device\n");
121 rc = rc_lock = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
122 if (rc_lock >= 0) {
123 rc = usb_reset_composite_device(hid_to_usb_dev(hid), usbhid->intf);
124 if (rc_lock)
125 usb_unlock_device(hid_to_usb_dev(hid));
126 }
127 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
128 }
129
130 switch (rc) {
131 case 0:
132 if (!test_bit(HID_IN_RUNNING, &usbhid->iofl))
133 hid_io_error(hid);
134 break;
135 default:
136 err_hid("can't reset device, %s-%s/input%d, status %d",
137 hid_to_usb_dev(hid)->bus->bus_name,
138 hid_to_usb_dev(hid)->devpath,
139 usbhid->ifnum, rc);
140 /* FALLTHROUGH */
141 case -EHOSTUNREACH:
142 case -ENODEV:
143 case -EINTR:
144 break;
145 }
146 }
147
148 /* Main I/O error handler */
149 static void hid_io_error(struct hid_device *hid)
150 {
151 unsigned long flags;
152 struct usbhid_device *usbhid = hid->driver_data;
153
154 spin_lock_irqsave(&usbhid->inlock, flags);
155
156 /* Stop when disconnected */
157 if (usb_get_intfdata(usbhid->intf) == NULL)
158 goto done;
159
160 /* If it has been a while since the last error, we'll assume
161 * this a brand new error and reset the retry timeout. */
162 if (time_after(jiffies, usbhid->stop_retry + HZ/2))
163 usbhid->retry_delay = 0;
164
165 /* When an error occurs, retry at increasing intervals */
166 if (usbhid->retry_delay == 0) {
167 usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */
168 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
169 } else if (usbhid->retry_delay < 100)
170 usbhid->retry_delay *= 2;
171
172 if (time_after(jiffies, usbhid->stop_retry)) {
173
174 /* Retries failed, so do a port reset */
175 if (!test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
176 schedule_work(&usbhid->reset_work);
177 goto done;
178 }
179 }
180
181 mod_timer(&usbhid->io_retry,
182 jiffies + msecs_to_jiffies(usbhid->retry_delay));
183 done:
184 spin_unlock_irqrestore(&usbhid->inlock, flags);
185 }
186
187 /*
188 * Input interrupt completion handler.
189 */
190
191 static void hid_irq_in(struct urb *urb)
192 {
193 struct hid_device *hid = urb->context;
194 struct usbhid_device *usbhid = hid->driver_data;
195 int status;
196
197 switch (urb->status) {
198 case 0: /* success */
199 usbhid->retry_delay = 0;
200 hid_input_report(urb->context, HID_INPUT_REPORT,
201 urb->transfer_buffer,
202 urb->actual_length, 1);
203 break;
204 case -EPIPE: /* stall */
205 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
206 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
207 schedule_work(&usbhid->reset_work);
208 return;
209 case -ECONNRESET: /* unlink */
210 case -ENOENT:
211 case -ESHUTDOWN: /* unplug */
212 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
213 return;
214 case -EILSEQ: /* protocol error or unplug */
215 case -EPROTO: /* protocol error or unplug */
216 case -ETIME: /* protocol error or unplug */
217 case -ETIMEDOUT: /* Should never happen, but... */
218 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
219 hid_io_error(hid);
220 return;
221 default: /* error */
222 warn("input irq status %d received", urb->status);
223 }
224
225 status = usb_submit_urb(urb, GFP_ATOMIC);
226 if (status) {
227 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
228 if (status != -EPERM) {
229 err_hid("can't resubmit intr, %s-%s/input%d, status %d",
230 hid_to_usb_dev(hid)->bus->bus_name,
231 hid_to_usb_dev(hid)->devpath,
232 usbhid->ifnum, status);
233 hid_io_error(hid);
234 }
235 }
236 }
237
238 static int hid_submit_out(struct hid_device *hid)
239 {
240 struct hid_report *report;
241 struct usbhid_device *usbhid = hid->driver_data;
242
243 report = usbhid->out[usbhid->outtail];
244
245 hid_output_report(report, usbhid->outbuf);
246 usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
247 usbhid->urbout->dev = hid_to_usb_dev(hid);
248
249 dbg_hid("submitting out urb\n");
250
251 if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) {
252 err_hid("usb_submit_urb(out) failed");
253 return -1;
254 }
255
256 return 0;
257 }
258
259 static int hid_submit_ctrl(struct hid_device *hid)
260 {
261 struct hid_report *report;
262 unsigned char dir;
263 int len;
264 struct usbhid_device *usbhid = hid->driver_data;
265
266 report = usbhid->ctrl[usbhid->ctrltail].report;
267 dir = usbhid->ctrl[usbhid->ctrltail].dir;
268
269 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
270 if (dir == USB_DIR_OUT) {
271 hid_output_report(report, usbhid->ctrlbuf);
272 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
273 usbhid->urbctrl->transfer_buffer_length = len;
274 } else {
275 int maxpacket, padlen;
276
277 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
278 maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0);
279 if (maxpacket > 0) {
280 padlen = (len + maxpacket - 1) / maxpacket;
281 padlen *= maxpacket;
282 if (padlen > usbhid->bufsize)
283 padlen = usbhid->bufsize;
284 } else
285 padlen = 0;
286 usbhid->urbctrl->transfer_buffer_length = padlen;
287 }
288 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
289
290 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
291 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
292 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
293 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
294 usbhid->cr->wLength = cpu_to_le16(len);
295
296 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
297 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
298 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
299
300 if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
301 err_hid("usb_submit_urb(ctrl) failed");
302 return -1;
303 }
304
305 return 0;
306 }
307
308 /*
309 * Output interrupt completion handler.
310 */
311
312 static void hid_irq_out(struct urb *urb)
313 {
314 struct hid_device *hid = urb->context;
315 struct usbhid_device *usbhid = hid->driver_data;
316 unsigned long flags;
317 int unplug = 0;
318
319 switch (urb->status) {
320 case 0: /* success */
321 break;
322 case -ESHUTDOWN: /* unplug */
323 unplug = 1;
324 case -EILSEQ: /* protocol error or unplug */
325 case -EPROTO: /* protocol error or unplug */
326 case -ECONNRESET: /* unlink */
327 case -ENOENT:
328 break;
329 default: /* error */
330 warn("output irq status %d received", urb->status);
331 }
332
333 spin_lock_irqsave(&usbhid->outlock, flags);
334
335 if (unplug)
336 usbhid->outtail = usbhid->outhead;
337 else
338 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
339
340 if (usbhid->outhead != usbhid->outtail) {
341 if (hid_submit_out(hid)) {
342 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
343 wake_up(&hid->wait);
344 }
345 spin_unlock_irqrestore(&usbhid->outlock, flags);
346 return;
347 }
348
349 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
350 spin_unlock_irqrestore(&usbhid->outlock, flags);
351 wake_up(&hid->wait);
352 }
353
354 /*
355 * Control pipe completion handler.
356 */
357
358 static void hid_ctrl(struct urb *urb)
359 {
360 struct hid_device *hid = urb->context;
361 struct usbhid_device *usbhid = hid->driver_data;
362 unsigned long flags;
363 int unplug = 0;
364
365 spin_lock_irqsave(&usbhid->ctrllock, flags);
366
367 switch (urb->status) {
368 case 0: /* success */
369 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
370 hid_input_report(urb->context, usbhid->ctrl[usbhid->ctrltail].report->type,
371 urb->transfer_buffer, urb->actual_length, 0);
372 break;
373 case -ESHUTDOWN: /* unplug */
374 unplug = 1;
375 case -EILSEQ: /* protocol error or unplug */
376 case -EPROTO: /* protocol error or unplug */
377 case -ECONNRESET: /* unlink */
378 case -ENOENT:
379 case -EPIPE: /* report not available */
380 break;
381 default: /* error */
382 warn("ctrl urb status %d received", urb->status);
383 }
384
385 if (unplug)
386 usbhid->ctrltail = usbhid->ctrlhead;
387 else
388 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
389
390 if (usbhid->ctrlhead != usbhid->ctrltail) {
391 if (hid_submit_ctrl(hid)) {
392 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
393 wake_up(&hid->wait);
394 }
395 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
396 return;
397 }
398
399 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
400 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
401 wake_up(&hid->wait);
402 }
403
404 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
405 {
406 int head;
407 unsigned long flags;
408 struct usbhid_device *usbhid = hid->driver_data;
409
410 if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
411 return;
412
413 if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
414
415 spin_lock_irqsave(&usbhid->outlock, flags);
416
417 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
418 spin_unlock_irqrestore(&usbhid->outlock, flags);
419 warn("output queue full");
420 return;
421 }
422
423 usbhid->out[usbhid->outhead] = report;
424 usbhid->outhead = head;
425
426 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl))
427 if (hid_submit_out(hid))
428 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
429
430 spin_unlock_irqrestore(&usbhid->outlock, flags);
431 return;
432 }
433
434 spin_lock_irqsave(&usbhid->ctrllock, flags);
435
436 if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
437 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
438 warn("control queue full");
439 return;
440 }
441
442 usbhid->ctrl[usbhid->ctrlhead].report = report;
443 usbhid->ctrl[usbhid->ctrlhead].dir = dir;
444 usbhid->ctrlhead = head;
445
446 if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl))
447 if (hid_submit_ctrl(hid))
448 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
449
450 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
451 }
452
453 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
454 {
455 struct hid_device *hid = input_get_drvdata(dev);
456 struct hid_field *field;
457 int offset;
458
459 if (type == EV_FF)
460 return input_ff_event(dev, type, code, value);
461
462 if (type != EV_LED)
463 return -1;
464
465 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
466 warn("event field not found");
467 return -1;
468 }
469
470 hid_set_field(field, offset, value);
471 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
472
473 return 0;
474 }
475
476 int usbhid_wait_io(struct hid_device *hid)
477 {
478 struct usbhid_device *usbhid = hid->driver_data;
479
480 if (!wait_event_timeout(hid->wait, (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
481 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
482 10*HZ)) {
483 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
484 return -1;
485 }
486
487 return 0;
488 }
489
490 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
491 {
492 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
493 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
494 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
495 }
496
497 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
498 unsigned char type, void *buf, int size)
499 {
500 int result, retries = 4;
501
502 memset(buf, 0, size);
503
504 do {
505 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
506 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
507 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
508 retries--;
509 } while (result < size && retries);
510 return result;
511 }
512
513 int usbhid_open(struct hid_device *hid)
514 {
515 ++hid->open;
516 if (hid_start_in(hid))
517 hid_io_error(hid);
518 return 0;
519 }
520
521 void usbhid_close(struct hid_device *hid)
522 {
523 struct usbhid_device *usbhid = hid->driver_data;
524
525 if (!--hid->open)
526 usb_kill_urb(usbhid->urbin);
527 }
528
529 /*
530 * Initialize all reports
531 */
532
533 void usbhid_init_reports(struct hid_device *hid)
534 {
535 struct hid_report *report;
536 struct usbhid_device *usbhid = hid->driver_data;
537 int err, ret;
538
539 list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
540 usbhid_submit_report(hid, report, USB_DIR_IN);
541
542 list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
543 usbhid_submit_report(hid, report, USB_DIR_IN);
544
545 err = 0;
546 ret = usbhid_wait_io(hid);
547 while (ret) {
548 err |= ret;
549 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
550 usb_kill_urb(usbhid->urbctrl);
551 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
552 usb_kill_urb(usbhid->urbout);
553 ret = usbhid_wait_io(hid);
554 }
555
556 if (err)
557 warn("timeout initializing reports");
558 }
559
560 /*
561 * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
562 */
563 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
564 unsigned int hid_code, struct hid_field **pfield)
565 {
566 struct hid_report *report;
567 struct hid_field *field;
568 struct hid_usage *usage;
569 int i, j;
570
571 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
572 for (i = 0; i < report->maxfield; i++) {
573 field = report->field[i];
574 for (j = 0; j < field->maxusage; j++) {
575 usage = &field->usage[j];
576 if ((usage->hid & HID_USAGE_PAGE) == page &&
577 (usage->hid & 0xFFFF) == hid_code) {
578 *pfield = field;
579 return j;
580 }
581 }
582 }
583 }
584 return -1;
585 }
586
587 static void usbhid_set_leds(struct hid_device *hid)
588 {
589 struct hid_field *field;
590 int offset;
591
592 if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
593 hid_set_field(field, offset, 0);
594 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
595 }
596 }
597
598 /*
599 * Traverse the supplied list of reports and find the longest
600 */
601 static void hid_find_max_report(struct hid_device *hid, unsigned int type, int *max)
602 {
603 struct hid_report *report;
604 int size;
605
606 list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
607 size = ((report->size - 1) >> 3) + 1;
608 if (type == HID_INPUT_REPORT && hid->report_enum[type].numbered)
609 size++;
610 if (*max < size)
611 *max = size;
612 }
613 }
614
615 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
616 {
617 struct usbhid_device *usbhid = hid->driver_data;
618
619 if (!(usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->inbuf_dma)))
620 return -1;
621 if (!(usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->outbuf_dma)))
622 return -1;
623 if (!(usbhid->cr = usb_buffer_alloc(dev, sizeof(*(usbhid->cr)), GFP_ATOMIC, &usbhid->cr_dma)))
624 return -1;
625 if (!(usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->ctrlbuf_dma)))
626 return -1;
627
628 return 0;
629 }
630
631 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
632 {
633 struct usbhid_device *usbhid = hid->driver_data;
634
635 usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
636 usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
637 usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma);
638 usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
639 }
640
641 /*
642 * Sending HID_REQ_GET_REPORT changes the operation mode of the ps3 controller
643 * to "operational". Without this, the ps3 controller will not report any
644 * events.
645 */
646 static void hid_fixup_sony_ps3_controller(struct usb_device *dev, int ifnum)
647 {
648 int result;
649 char *buf = kmalloc(18, GFP_KERNEL);
650
651 if (!buf)
652 return;
653
654 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
655 HID_REQ_GET_REPORT,
656 USB_DIR_IN | USB_TYPE_CLASS |
657 USB_RECIP_INTERFACE,
658 (3 << 8) | 0xf2, ifnum, buf, 17,
659 USB_CTRL_GET_TIMEOUT);
660
661 if (result < 0)
662 err_hid("%s failed: %d\n", __func__, result);
663
664 kfree(buf);
665 }
666
667 static struct hid_device *usb_hid_configure(struct usb_interface *intf)
668 {
669 struct usb_host_interface *interface = intf->cur_altsetting;
670 struct usb_device *dev = interface_to_usbdev (intf);
671 struct hid_descriptor *hdesc;
672 struct hid_device *hid;
673 u32 quirks = 0;
674 unsigned rsize = 0;
675 char *rdesc;
676 int n, len, insize = 0;
677 struct usbhid_device *usbhid;
678
679 quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
680 le16_to_cpu(dev->descriptor.idProduct));
681
682 /* Many keyboards and mice don't like to be polled for reports,
683 * so we will always set the HID_QUIRK_NOGET flag for them. */
684 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
685 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
686 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
687 quirks |= HID_QUIRK_NOGET;
688 }
689
690 if (quirks & HID_QUIRK_IGNORE)
691 return NULL;
692
693 if ((quirks & HID_QUIRK_IGNORE_MOUSE) &&
694 (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE))
695 return NULL;
696
697
698 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
699 (!interface->desc.bNumEndpoints ||
700 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
701 dbg_hid("class descriptor not present\n");
702 return NULL;
703 }
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 NULL;
712 }
713
714 if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
715 dbg_hid("couldn't allocate rdesc memory\n");
716 return NULL;
717 }
718
719 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
720
721 if ((n = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber, HID_DT_REPORT, rdesc, rsize)) < 0) {
722 dbg_hid("reading report descriptor failed\n");
723 kfree(rdesc);
724 return NULL;
725 }
726
727 usbhid_fixup_report_descriptor(le16_to_cpu(dev->descriptor.idVendor),
728 le16_to_cpu(dev->descriptor.idProduct), rdesc,
729 rsize, rdesc_quirks_param);
730
731 dbg_hid("report descriptor (size %u, read %d) = ", rsize, n);
732 for (n = 0; n < rsize; n++)
733 dbg_hid_line(" %02x", (unsigned char) rdesc[n]);
734 dbg_hid_line("\n");
735
736 if (!(hid = hid_parse_report(rdesc, n))) {
737 dbg_hid("parsing report descriptor failed\n");
738 kfree(rdesc);
739 return NULL;
740 }
741
742 kfree(rdesc);
743 hid->quirks = quirks;
744
745 if (!(usbhid = kzalloc(sizeof(struct usbhid_device), GFP_KERNEL)))
746 goto fail;
747
748 hid->driver_data = usbhid;
749 usbhid->hid = hid;
750
751 usbhid->bufsize = HID_MIN_BUFFER_SIZE;
752 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
753 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
754 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
755
756 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
757 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
758
759 hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
760
761 if (insize > HID_MAX_BUFFER_SIZE)
762 insize = HID_MAX_BUFFER_SIZE;
763
764 if (hid_alloc_buffers(dev, hid)) {
765 hid_free_buffers(dev, hid);
766 goto fail;
767 }
768
769 for (n = 0; n < interface->desc.bNumEndpoints; n++) {
770
771 struct usb_endpoint_descriptor *endpoint;
772 int pipe;
773 int interval;
774
775 endpoint = &interface->endpoint[n].desc;
776 if ((endpoint->bmAttributes & 3) != 3) /* Not an interrupt endpoint */
777 continue;
778
779 interval = endpoint->bInterval;
780
781 /* Change the polling interval of mice. */
782 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
783 interval = hid_mousepoll_interval;
784
785 if (usb_endpoint_dir_in(endpoint)) {
786 if (usbhid->urbin)
787 continue;
788 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
789 goto fail;
790 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
791 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
792 hid_irq_in, hid, interval);
793 usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
794 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
795 } else {
796 if (usbhid->urbout)
797 continue;
798 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
799 goto fail;
800 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
801 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
802 hid_irq_out, hid, interval);
803 usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
804 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
805 }
806 }
807
808 if (!usbhid->urbin) {
809 err_hid("couldn't find an input interrupt endpoint");
810 goto fail;
811 }
812
813 init_waitqueue_head(&hid->wait);
814
815 INIT_WORK(&usbhid->reset_work, hid_reset);
816 setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
817
818 spin_lock_init(&usbhid->inlock);
819 spin_lock_init(&usbhid->outlock);
820 spin_lock_init(&usbhid->ctrllock);
821
822 hid->version = le16_to_cpu(hdesc->bcdHID);
823 hid->country = hdesc->bCountryCode;
824 hid->dev = &intf->dev;
825 usbhid->intf = intf;
826 usbhid->ifnum = interface->desc.bInterfaceNumber;
827
828 hid->name[0] = 0;
829
830 if (dev->manufacturer)
831 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
832
833 if (dev->product) {
834 if (dev->manufacturer)
835 strlcat(hid->name, " ", sizeof(hid->name));
836 strlcat(hid->name, dev->product, sizeof(hid->name));
837 }
838
839 if (!strlen(hid->name))
840 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
841 le16_to_cpu(dev->descriptor.idVendor),
842 le16_to_cpu(dev->descriptor.idProduct));
843
844 hid->bus = BUS_USB;
845 hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
846 hid->product = le16_to_cpu(dev->descriptor.idProduct);
847
848 usb_make_path(dev, hid->phys, sizeof(hid->phys));
849 strlcat(hid->phys, "/input", sizeof(hid->phys));
850 len = strlen(hid->phys);
851 if (len < sizeof(hid->phys) - 1)
852 snprintf(hid->phys + len, sizeof(hid->phys) - len,
853 "%d", intf->altsetting[0].desc.bInterfaceNumber);
854
855 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
856 hid->uniq[0] = 0;
857
858 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
859 if (!usbhid->urbctrl)
860 goto fail;
861
862 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
863 usbhid->ctrlbuf, 1, hid_ctrl, hid);
864 usbhid->urbctrl->setup_dma = usbhid->cr_dma;
865 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
866 usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
867 hid->hidinput_input_event = usb_hidinput_input_event;
868 hid->hid_open = usbhid_open;
869 hid->hid_close = usbhid_close;
870 #ifdef CONFIG_USB_HIDDEV
871 hid->hiddev_hid_event = hiddev_hid_event;
872 hid->hiddev_report_event = hiddev_report_event;
873 #endif
874 return hid;
875
876 fail:
877 usb_free_urb(usbhid->urbin);
878 usb_free_urb(usbhid->urbout);
879 usb_free_urb(usbhid->urbctrl);
880 hid_free_buffers(dev, hid);
881 hid_free_device(hid);
882
883 return NULL;
884 }
885
886 static void hid_disconnect(struct usb_interface *intf)
887 {
888 struct hid_device *hid = usb_get_intfdata (intf);
889 struct usbhid_device *usbhid;
890
891 if (!hid)
892 return;
893
894 usbhid = hid->driver_data;
895
896 spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
897 usb_set_intfdata(intf, NULL);
898 spin_unlock_irq(&usbhid->inlock);
899 usb_kill_urb(usbhid->urbin);
900 usb_kill_urb(usbhid->urbout);
901 usb_kill_urb(usbhid->urbctrl);
902
903 del_timer_sync(&usbhid->io_retry);
904 cancel_work_sync(&usbhid->reset_work);
905
906 if (hid->claimed & HID_CLAIMED_INPUT)
907 hidinput_disconnect(hid);
908 if (hid->claimed & HID_CLAIMED_HIDDEV)
909 hiddev_disconnect(hid);
910
911 usb_free_urb(usbhid->urbin);
912 usb_free_urb(usbhid->urbctrl);
913 usb_free_urb(usbhid->urbout);
914
915 hid_free_buffers(hid_to_usb_dev(hid), hid);
916 hid_free_device(hid);
917 }
918
919 static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
920 {
921 struct hid_device *hid;
922 char path[64];
923 int i;
924 char *c;
925
926 dbg_hid("HID probe called for ifnum %d\n",
927 intf->altsetting->desc.bInterfaceNumber);
928
929 if (!(hid = usb_hid_configure(intf)))
930 return -ENODEV;
931
932 usbhid_init_reports(hid);
933 hid_dump_device(hid);
934 if (hid->quirks & HID_QUIRK_RESET_LEDS)
935 usbhid_set_leds(hid);
936
937 if (!hidinput_connect(hid))
938 hid->claimed |= HID_CLAIMED_INPUT;
939 if (!hiddev_connect(hid))
940 hid->claimed |= HID_CLAIMED_HIDDEV;
941
942 usb_set_intfdata(intf, hid);
943
944 if (!hid->claimed) {
945 printk ("HID device not claimed by input or hiddev\n");
946 hid_disconnect(intf);
947 return -ENODEV;
948 }
949
950 if ((hid->claimed & HID_CLAIMED_INPUT))
951 hid_ff_init(hid);
952
953 if (hid->quirks & HID_QUIRK_SONY_PS3_CONTROLLER)
954 hid_fixup_sony_ps3_controller(interface_to_usbdev(intf),
955 intf->cur_altsetting->desc.bInterfaceNumber);
956
957 printk(KERN_INFO);
958
959 if (hid->claimed & HID_CLAIMED_INPUT)
960 printk("input");
961 if (hid->claimed == (HID_CLAIMED_INPUT | HID_CLAIMED_HIDDEV))
962 printk(",");
963 if (hid->claimed & HID_CLAIMED_HIDDEV)
964 printk("hiddev%d", hid->minor);
965
966 c = "Device";
967 for (i = 0; i < hid->maxcollection; i++) {
968 if (hid->collection[i].type == HID_COLLECTION_APPLICATION &&
969 (hid->collection[i].usage & HID_USAGE_PAGE) == HID_UP_GENDESK &&
970 (hid->collection[i].usage & 0xffff) < ARRAY_SIZE(hid_types)) {
971 c = hid_types[hid->collection[i].usage & 0xffff];
972 break;
973 }
974 }
975
976 usb_make_path(interface_to_usbdev(intf), path, 63);
977
978 printk(": USB HID v%x.%02x %s [%s] on %s\n",
979 hid->version >> 8, hid->version & 0xff, c, hid->name, path);
980
981 return 0;
982 }
983
984 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
985 {
986 struct hid_device *hid = usb_get_intfdata (intf);
987 struct usbhid_device *usbhid = hid->driver_data;
988
989 spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
990 set_bit(HID_SUSPENDED, &usbhid->iofl);
991 spin_unlock_irq(&usbhid->inlock);
992 del_timer(&usbhid->io_retry);
993 usb_kill_urb(usbhid->urbin);
994 dev_dbg(&intf->dev, "suspend\n");
995 return 0;
996 }
997
998 static int hid_resume(struct usb_interface *intf)
999 {
1000 struct hid_device *hid = usb_get_intfdata (intf);
1001 struct usbhid_device *usbhid = hid->driver_data;
1002 int status;
1003
1004 clear_bit(HID_SUSPENDED, &usbhid->iofl);
1005 usbhid->retry_delay = 0;
1006 status = hid_start_in(hid);
1007 dev_dbg(&intf->dev, "resume status %d\n", status);
1008 return status;
1009 }
1010
1011 /* Treat USB reset pretty much the same as suspend/resume */
1012 static void hid_pre_reset(struct usb_interface *intf)
1013 {
1014 /* FIXME: What if the interface is already suspended? */
1015 hid_suspend(intf, PMSG_ON);
1016 }
1017
1018 static void hid_post_reset(struct usb_interface *intf)
1019 {
1020 struct usb_device *dev = interface_to_usbdev (intf);
1021
1022 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1023 /* FIXME: Any more reinitialization needed? */
1024
1025 hid_resume(intf);
1026 }
1027
1028 static struct usb_device_id hid_usb_ids [] = {
1029 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1030 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1031 { } /* Terminating entry */
1032 };
1033
1034 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1035
1036 static struct usb_driver hid_driver = {
1037 .name = "usbhid",
1038 .probe = hid_probe,
1039 .disconnect = hid_disconnect,
1040 .suspend = hid_suspend,
1041 .resume = hid_resume,
1042 .pre_reset = hid_pre_reset,
1043 .post_reset = hid_post_reset,
1044 .id_table = hid_usb_ids,
1045 };
1046
1047 static int __init hid_init(void)
1048 {
1049 int retval;
1050 retval = usbhid_quirks_init(quirks_param);
1051 if (retval)
1052 goto usbhid_quirks_init_fail;
1053 retval = hiddev_init();
1054 if (retval)
1055 goto hiddev_init_fail;
1056 retval = usb_register(&hid_driver);
1057 if (retval)
1058 goto usb_register_fail;
1059 info(DRIVER_VERSION ":" DRIVER_DESC);
1060
1061 return 0;
1062 usb_register_fail:
1063 hiddev_exit();
1064 hiddev_init_fail:
1065 usbhid_quirks_exit();
1066 usbhid_quirks_init_fail:
1067 return retval;
1068 }
1069
1070 static void __exit hid_exit(void)
1071 {
1072 usb_deregister(&hid_driver);
1073 hiddev_exit();
1074 usbhid_quirks_exit();
1075 }
1076
1077 module_init(hid_init);
1078 module_exit(hid_exit);
1079
1080 MODULE_AUTHOR(DRIVER_AUTHOR);
1081 MODULE_DESCRIPTION(DRIVER_DESC);
1082 MODULE_LICENSE(DRIVER_LICENSE);
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