Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
[sfrench/cifs-2.6.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) 2006-2008 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/mutex.h>
24 #include <linux/smp_lock.h>
25 #include <linux/spinlock.h>
26 #include <asm/unaligned.h>
27 #include <asm/byteorder.h>
28 #include <linux/input.h>
29 #include <linux/wait.h>
30
31 #include <linux/usb.h>
32
33 #include <linux/hid.h>
34 #include <linux/hiddev.h>
35 #include <linux/hid-debug.h>
36 #include <linux/hidraw.h>
37 #include "usbhid.h"
38
39 /*
40  * Version Information
41  */
42
43 #define DRIVER_VERSION "v2.6"
44 #define DRIVER_AUTHOR "Andreas Gal, Vojtech Pavlik, Jiri Kosina"
45 #define DRIVER_DESC "USB HID core driver"
46 #define DRIVER_LICENSE "GPL"
47
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 /*
64  * Input submission and I/O error handler.
65  */
66
67 static void hid_io_error(struct hid_device *hid);
68
69 /* Start up the input URB */
70 static int hid_start_in(struct hid_device *hid)
71 {
72         unsigned long flags;
73         int rc = 0;
74         struct usbhid_device *usbhid = hid->driver_data;
75
76         spin_lock_irqsave(&usbhid->inlock, flags);
77         if (hid->open > 0 && !test_bit(HID_SUSPENDED, &usbhid->iofl) &&
78                         !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
79                         !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
80                 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
81                 if (rc != 0)
82                         clear_bit(HID_IN_RUNNING, &usbhid->iofl);
83         }
84         spin_unlock_irqrestore(&usbhid->inlock, flags);
85         return rc;
86 }
87
88 /* I/O retry timer routine */
89 static void hid_retry_timeout(unsigned long _hid)
90 {
91         struct hid_device *hid = (struct hid_device *) _hid;
92         struct usbhid_device *usbhid = hid->driver_data;
93
94         dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
95         if (hid_start_in(hid))
96                 hid_io_error(hid);
97 }
98
99 /* Workqueue routine to reset the device or clear a halt */
100 static void hid_reset(struct work_struct *work)
101 {
102         struct usbhid_device *usbhid =
103                 container_of(work, struct usbhid_device, reset_work);
104         struct hid_device *hid = usbhid->hid;
105         int rc = 0;
106
107         if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
108                 dev_dbg(&usbhid->intf->dev, "clear halt\n");
109                 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
110                 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
111                 hid_start_in(hid);
112         }
113
114         else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
115                 dev_dbg(&usbhid->intf->dev, "resetting device\n");
116                 rc = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
117                 if (rc == 0) {
118                         rc = usb_reset_device(hid_to_usb_dev(hid));
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                 dev_warn(&urb->dev->dev, "input irq status %d  "
217                                 "received\n", urb->status);
218         }
219
220         status = usb_submit_urb(urb, GFP_ATOMIC);
221         if (status) {
222                 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
223                 if (status != -EPERM) {
224                         err_hid("can't resubmit intr, %s-%s/input%d, status %d",
225                                         hid_to_usb_dev(hid)->bus->bus_name,
226                                         hid_to_usb_dev(hid)->devpath,
227                                         usbhid->ifnum, status);
228                         hid_io_error(hid);
229                 }
230         }
231 }
232
233 static int hid_submit_out(struct hid_device *hid)
234 {
235         struct hid_report *report;
236         char *raw_report;
237         struct usbhid_device *usbhid = hid->driver_data;
238
239         report = usbhid->out[usbhid->outtail].report;
240         raw_report = usbhid->out[usbhid->outtail].raw_report;
241
242         usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
243         usbhid->urbout->dev = hid_to_usb_dev(hid);
244         memcpy(usbhid->outbuf, raw_report, usbhid->urbout->transfer_buffer_length);
245         kfree(raw_report);
246
247         dbg_hid("submitting out urb\n");
248
249         if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) {
250                 err_hid("usb_submit_urb(out) failed");
251                 return -1;
252         }
253
254         return 0;
255 }
256
257 static int hid_submit_ctrl(struct hid_device *hid)
258 {
259         struct hid_report *report;
260         unsigned char dir;
261         char *raw_report;
262         int len;
263         struct usbhid_device *usbhid = hid->driver_data;
264
265         report = usbhid->ctrl[usbhid->ctrltail].report;
266         raw_report = usbhid->ctrl[usbhid->ctrltail].raw_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                 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
272                 usbhid->urbctrl->transfer_buffer_length = len;
273                 memcpy(usbhid->ctrlbuf, raw_report, len);
274                 kfree(raw_report);
275         } else {
276                 int maxpacket, padlen;
277
278                 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
279                 maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0);
280                 if (maxpacket > 0) {
281                         padlen = DIV_ROUND_UP(len, maxpacket);
282                         padlen *= maxpacket;
283                         if (padlen > usbhid->bufsize)
284                                 padlen = usbhid->bufsize;
285                 } else
286                         padlen = 0;
287                 usbhid->urbctrl->transfer_buffer_length = padlen;
288         }
289         usbhid->urbctrl->dev = hid_to_usb_dev(hid);
290
291         usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
292         usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
293         usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
294         usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
295         usbhid->cr->wLength = cpu_to_le16(len);
296
297         dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
298                 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
299                 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
300
301         if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
302                 err_hid("usb_submit_urb(ctrl) failed");
303                 return -1;
304         }
305
306         return 0;
307 }
308
309 /*
310  * Output interrupt completion handler.
311  */
312
313 static void hid_irq_out(struct urb *urb)
314 {
315         struct hid_device *hid = urb->context;
316         struct usbhid_device *usbhid = hid->driver_data;
317         unsigned long flags;
318         int unplug = 0;
319
320         switch (urb->status) {
321         case 0:                 /* success */
322                 break;
323         case -ESHUTDOWN:        /* unplug */
324                 unplug = 1;
325         case -EILSEQ:           /* protocol error or unplug */
326         case -EPROTO:           /* protocol error or unplug */
327         case -ECONNRESET:       /* unlink */
328         case -ENOENT:
329                 break;
330         default:                /* error */
331                 dev_warn(&urb->dev->dev, "output irq status %d "
332                                 "received\n", urb->status);
333         }
334
335         spin_lock_irqsave(&usbhid->outlock, flags);
336
337         if (unplug)
338                 usbhid->outtail = usbhid->outhead;
339         else
340                 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
341
342         if (usbhid->outhead != usbhid->outtail) {
343                 if (hid_submit_out(hid)) {
344                         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
345                         wake_up(&usbhid->wait);
346                 }
347                 spin_unlock_irqrestore(&usbhid->outlock, flags);
348                 return;
349         }
350
351         clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
352         spin_unlock_irqrestore(&usbhid->outlock, flags);
353         wake_up(&usbhid->wait);
354 }
355
356 /*
357  * Control pipe completion handler.
358  */
359
360 static void hid_ctrl(struct urb *urb)
361 {
362         struct hid_device *hid = urb->context;
363         struct usbhid_device *usbhid = hid->driver_data;
364         unsigned long flags;
365         int unplug = 0;
366
367         spin_lock_irqsave(&usbhid->ctrllock, flags);
368
369         switch (urb->status) {
370         case 0:                 /* success */
371                 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
372                         hid_input_report(urb->context,
373                                 usbhid->ctrl[usbhid->ctrltail].report->type,
374                                 urb->transfer_buffer, urb->actual_length, 0);
375                 break;
376         case -ESHUTDOWN:        /* unplug */
377                 unplug = 1;
378         case -EILSEQ:           /* protocol error or unplug */
379         case -EPROTO:           /* protocol error or unplug */
380         case -ECONNRESET:       /* unlink */
381         case -ENOENT:
382         case -EPIPE:            /* report not available */
383                 break;
384         default:                /* error */
385                 dev_warn(&urb->dev->dev, "ctrl urb status %d "
386                                 "received\n", urb->status);
387         }
388
389         if (unplug)
390                 usbhid->ctrltail = usbhid->ctrlhead;
391         else
392                 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
393
394         if (usbhid->ctrlhead != usbhid->ctrltail) {
395                 if (hid_submit_ctrl(hid)) {
396                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
397                         wake_up(&usbhid->wait);
398                 }
399                 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
400                 return;
401         }
402
403         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
404         spin_unlock_irqrestore(&usbhid->ctrllock, flags);
405         wake_up(&usbhid->wait);
406 }
407
408 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
409 {
410         int head;
411         unsigned long flags;
412         struct usbhid_device *usbhid = hid->driver_data;
413         int len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
414
415         if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
416                 return;
417
418         if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
419
420                 spin_lock_irqsave(&usbhid->outlock, flags);
421
422                 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
423                         spin_unlock_irqrestore(&usbhid->outlock, flags);
424                         dev_warn(&hid->dev, "output queue full\n");
425                         return;
426                 }
427
428                 usbhid->out[usbhid->outhead].raw_report = kmalloc(len, GFP_ATOMIC);
429                 if (!usbhid->out[usbhid->outhead].raw_report) {
430                         spin_unlock_irqrestore(&usbhid->outlock, flags);
431                         dev_warn(&hid->dev, "output queueing failed\n");
432                         return;
433                 }
434                 hid_output_report(report, usbhid->out[usbhid->outhead].raw_report);
435                 usbhid->out[usbhid->outhead].report = report;
436                 usbhid->outhead = head;
437
438                 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl))
439                         if (hid_submit_out(hid))
440                                 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
441
442                 spin_unlock_irqrestore(&usbhid->outlock, flags);
443                 return;
444         }
445
446         spin_lock_irqsave(&usbhid->ctrllock, flags);
447
448         if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
449                 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
450                 dev_warn(&hid->dev, "control queue full\n");
451                 return;
452         }
453
454         if (dir == USB_DIR_OUT) {
455                 usbhid->ctrl[usbhid->ctrlhead].raw_report = kmalloc(len, GFP_ATOMIC);
456                 if (!usbhid->ctrl[usbhid->ctrlhead].raw_report) {
457                         spin_unlock_irqrestore(&usbhid->ctrllock, flags);
458                         dev_warn(&hid->dev, "control queueing failed\n");
459                         return;
460                 }
461                 hid_output_report(report, usbhid->ctrl[usbhid->ctrlhead].raw_report);
462         }
463         usbhid->ctrl[usbhid->ctrlhead].report = report;
464         usbhid->ctrl[usbhid->ctrlhead].dir = dir;
465         usbhid->ctrlhead = head;
466
467         if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl))
468                 if (hid_submit_ctrl(hid))
469                         clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
470
471         spin_unlock_irqrestore(&usbhid->ctrllock, flags);
472 }
473 EXPORT_SYMBOL_GPL(usbhid_submit_report);
474
475 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
476 {
477         struct hid_device *hid = input_get_drvdata(dev);
478         struct hid_field *field;
479         int offset;
480
481         if (type == EV_FF)
482                 return input_ff_event(dev, type, code, value);
483
484         if (type != EV_LED)
485                 return -1;
486
487         if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
488                 dev_warn(&dev->dev, "event field not found\n");
489                 return -1;
490         }
491
492         hid_set_field(field, offset, value);
493         usbhid_submit_report(hid, field->report, USB_DIR_OUT);
494
495         return 0;
496 }
497
498 int usbhid_wait_io(struct hid_device *hid)
499 {
500         struct usbhid_device *usbhid = hid->driver_data;
501
502         if (!wait_event_timeout(usbhid->wait,
503                                 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
504                                 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
505                                         10*HZ)) {
506                 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
507                 return -1;
508         }
509
510         return 0;
511 }
512
513 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
514 {
515         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
516                 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
517                 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
518 }
519
520 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
521                 unsigned char type, void *buf, int size)
522 {
523         int result, retries = 4;
524
525         memset(buf, 0, size);
526
527         do {
528                 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
529                                 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
530                                 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
531                 retries--;
532         } while (result < size && retries);
533         return result;
534 }
535
536 int usbhid_open(struct hid_device *hid)
537 {
538         struct usbhid_device *usbhid = hid->driver_data;
539         int res;
540
541         if (!hid->open++) {
542                 res = usb_autopm_get_interface(usbhid->intf);
543                 if (res < 0) {
544                         hid->open--;
545                         return -EIO;
546                 }
547         }
548         if (hid_start_in(hid))
549                 hid_io_error(hid);
550         return 0;
551 }
552
553 void usbhid_close(struct hid_device *hid)
554 {
555         struct usbhid_device *usbhid = hid->driver_data;
556
557         if (!--hid->open) {
558                 usb_kill_urb(usbhid->urbin);
559                 usb_autopm_put_interface(usbhid->intf);
560         }
561 }
562
563 /*
564  * Initialize all reports
565  */
566
567 void usbhid_init_reports(struct hid_device *hid)
568 {
569         struct hid_report *report;
570         struct usbhid_device *usbhid = hid->driver_data;
571         int err, ret;
572
573         list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
574                 usbhid_submit_report(hid, report, USB_DIR_IN);
575
576         list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
577                 usbhid_submit_report(hid, report, USB_DIR_IN);
578
579         err = 0;
580         ret = usbhid_wait_io(hid);
581         while (ret) {
582                 err |= ret;
583                 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
584                         usb_kill_urb(usbhid->urbctrl);
585                 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
586                         usb_kill_urb(usbhid->urbout);
587                 ret = usbhid_wait_io(hid);
588         }
589
590         if (err)
591                 dev_warn(&hid->dev, "timeout initializing reports\n");
592 }
593
594 /*
595  * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
596  */
597 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
598     unsigned int hid_code, struct hid_field **pfield)
599 {
600         struct hid_report *report;
601         struct hid_field *field;
602         struct hid_usage *usage;
603         int i, j;
604
605         list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
606                 for (i = 0; i < report->maxfield; i++) {
607                         field = report->field[i];
608                         for (j = 0; j < field->maxusage; j++) {
609                                 usage = &field->usage[j];
610                                 if ((usage->hid & HID_USAGE_PAGE) == page &&
611                                     (usage->hid & 0xFFFF) == hid_code) {
612                                         *pfield = field;
613                                         return j;
614                                 }
615                         }
616                 }
617         }
618         return -1;
619 }
620
621 void usbhid_set_leds(struct hid_device *hid)
622 {
623         struct hid_field *field;
624         int offset;
625
626         if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
627                 hid_set_field(field, offset, 0);
628                 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
629         }
630 }
631 EXPORT_SYMBOL_GPL(usbhid_set_leds);
632
633 /*
634  * Traverse the supplied list of reports and find the longest
635  */
636 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
637                 unsigned int *max)
638 {
639         struct hid_report *report;
640         unsigned int size;
641
642         list_for_each_entry(report, &hid->report_enum[type].report_list, list) {
643                 size = ((report->size - 1) >> 3) + 1 + hid->report_enum[type].numbered;
644                 if (*max < size)
645                         *max = size;
646         }
647 }
648
649 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
650 {
651         struct usbhid_device *usbhid = hid->driver_data;
652
653         usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
654                         &usbhid->inbuf_dma);
655         usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
656                         &usbhid->outbuf_dma);
657         usbhid->cr = usb_buffer_alloc(dev, sizeof(*usbhid->cr), GFP_KERNEL,
658                         &usbhid->cr_dma);
659         usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL,
660                         &usbhid->ctrlbuf_dma);
661         if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr ||
662                         !usbhid->ctrlbuf)
663                 return -1;
664
665         return 0;
666 }
667
668 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count)
669 {
670         struct usbhid_device *usbhid = hid->driver_data;
671         struct usb_device *dev = hid_to_usb_dev(hid);
672         struct usb_interface *intf = usbhid->intf;
673         struct usb_host_interface *interface = intf->cur_altsetting;
674         int ret;
675
676         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
677                 HID_REQ_SET_REPORT,
678                 USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
679                 ((HID_OUTPUT_REPORT + 1) << 8) | *buf,
680                 interface->desc.bInterfaceNumber, buf + 1, count - 1,
681                 USB_CTRL_SET_TIMEOUT);
682
683         /* count also the report id */
684         if (ret > 0)
685                 ret++;
686
687         return ret;
688 }
689
690 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
691 {
692         struct usbhid_device *usbhid = hid->driver_data;
693
694         usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma);
695         usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma);
696         usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma);
697         usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma);
698 }
699
700 static int usbhid_parse(struct hid_device *hid)
701 {
702         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
703         struct usb_host_interface *interface = intf->cur_altsetting;
704         struct usb_device *dev = interface_to_usbdev (intf);
705         struct hid_descriptor *hdesc;
706         u32 quirks = 0;
707         unsigned int rsize = 0;
708         char *rdesc;
709         int ret, n;
710
711         quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
712                         le16_to_cpu(dev->descriptor.idProduct));
713
714         /* Many keyboards and mice don't like to be polled for reports,
715          * so we will always set the HID_QUIRK_NOGET flag for them. */
716         if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
717                 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
718                         interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
719                                 quirks |= HID_QUIRK_NOGET;
720         }
721
722         if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
723             (!interface->desc.bNumEndpoints ||
724              usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
725                 dbg_hid("class descriptor not present\n");
726                 return -ENODEV;
727         }
728
729         hid->version = le16_to_cpu(hdesc->bcdHID);
730         hid->country = hdesc->bCountryCode;
731
732         for (n = 0; n < hdesc->bNumDescriptors; n++)
733                 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
734                         rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
735
736         if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
737                 dbg_hid("weird size of report descriptor (%u)\n", rsize);
738                 return -EINVAL;
739         }
740
741         if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
742                 dbg_hid("couldn't allocate rdesc memory\n");
743                 return -ENOMEM;
744         }
745
746         hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
747
748         ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
749                         HID_DT_REPORT, rdesc, rsize);
750         if (ret < 0) {
751                 dbg_hid("reading report descriptor failed\n");
752                 kfree(rdesc);
753                 goto err;
754         }
755
756         dbg_hid("report descriptor (size %u, read %d) = ", rsize, n);
757         for (n = 0; n < rsize; n++)
758                 dbg_hid_line(" %02x", (unsigned char) rdesc[n]);
759         dbg_hid_line("\n");
760
761         ret = hid_parse_report(hid, rdesc, rsize);
762         kfree(rdesc);
763         if (ret) {
764                 dbg_hid("parsing report descriptor failed\n");
765                 goto err;
766         }
767
768         hid->quirks = quirks;
769
770         return 0;
771 err:
772         return ret;
773 }
774
775 static int usbhid_start(struct hid_device *hid)
776 {
777         struct usb_interface *intf = to_usb_interface(hid->dev.parent);
778         struct usb_host_interface *interface = intf->cur_altsetting;
779         struct usb_device *dev = interface_to_usbdev(intf);
780         struct usbhid_device *usbhid = hid->driver_data;
781         unsigned int n, insize = 0;
782         int ret;
783
784         clear_bit(HID_DISCONNECTED, &usbhid->iofl);
785
786         usbhid->bufsize = HID_MIN_BUFFER_SIZE;
787         hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
788         hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
789         hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
790
791         if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
792                 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
793
794         hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
795
796         if (insize > HID_MAX_BUFFER_SIZE)
797                 insize = HID_MAX_BUFFER_SIZE;
798
799         if (hid_alloc_buffers(dev, hid)) {
800                 ret = -ENOMEM;
801                 goto fail;
802         }
803
804         for (n = 0; n < interface->desc.bNumEndpoints; n++) {
805                 struct usb_endpoint_descriptor *endpoint;
806                 int pipe;
807                 int interval;
808
809                 endpoint = &interface->endpoint[n].desc;
810                 if (!usb_endpoint_xfer_int(endpoint))
811                         continue;
812
813                 interval = endpoint->bInterval;
814
815                 /* Some vendors give fullspeed interval on highspeed devides */
816                 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
817                     dev->speed == USB_SPEED_HIGH) {
818                         interval = fls(endpoint->bInterval*8);
819                         printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
820                                hid->name, endpoint->bInterval, interval);
821                 }
822
823                 /* Change the polling interval of mice. */
824                 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
825                         interval = hid_mousepoll_interval;
826
827                 ret = -ENOMEM;
828                 if (usb_endpoint_dir_in(endpoint)) {
829                         if (usbhid->urbin)
830                                 continue;
831                         if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
832                                 goto fail;
833                         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
834                         usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
835                                          hid_irq_in, hid, interval);
836                         usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
837                         usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
838                 } else {
839                         if (usbhid->urbout)
840                                 continue;
841                         if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
842                                 goto fail;
843                         pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
844                         usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
845                                          hid_irq_out, hid, interval);
846                         usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
847                         usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
848                 }
849         }
850
851         init_waitqueue_head(&usbhid->wait);
852         INIT_WORK(&usbhid->reset_work, hid_reset);
853         setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
854
855         spin_lock_init(&usbhid->inlock);
856         spin_lock_init(&usbhid->outlock);
857         spin_lock_init(&usbhid->ctrllock);
858
859         usbhid->intf = intf;
860         usbhid->ifnum = interface->desc.bInterfaceNumber;
861
862         usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
863         if (!usbhid->urbctrl) {
864                 ret = -ENOMEM;
865                 goto fail;
866         }
867
868         usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
869                              usbhid->ctrlbuf, 1, hid_ctrl, hid);
870         usbhid->urbctrl->setup_dma = usbhid->cr_dma;
871         usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
872         usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
873
874         usbhid_init_reports(hid);
875         hid_dump_device(hid);
876
877         set_bit(HID_STARTED, &usbhid->iofl);
878
879         /* Some keyboards don't work until their LEDs have been set.
880          * Since BIOSes do set the LEDs, it must be safe for any device
881          * that supports the keyboard boot protocol.
882          */
883         if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT &&
884                         interface->desc.bInterfaceProtocol ==
885                                 USB_INTERFACE_PROTOCOL_KEYBOARD)
886                 usbhid_set_leds(hid);
887
888         return 0;
889
890 fail:
891         usb_free_urb(usbhid->urbin);
892         usb_free_urb(usbhid->urbout);
893         usb_free_urb(usbhid->urbctrl);
894         usbhid->urbin = NULL;
895         usbhid->urbout = NULL;
896         usbhid->urbctrl = NULL;
897         hid_free_buffers(dev, hid);
898         return ret;
899 }
900
901 static void usbhid_stop(struct hid_device *hid)
902 {
903         struct usbhid_device *usbhid = hid->driver_data;
904
905         if (WARN_ON(!usbhid))
906                 return;
907
908         clear_bit(HID_STARTED, &usbhid->iofl);
909         spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
910         set_bit(HID_DISCONNECTED, &usbhid->iofl);
911         spin_unlock_irq(&usbhid->inlock);
912         usb_kill_urb(usbhid->urbin);
913         usb_kill_urb(usbhid->urbout);
914         usb_kill_urb(usbhid->urbctrl);
915
916         del_timer_sync(&usbhid->io_retry);
917         cancel_work_sync(&usbhid->reset_work);
918
919         if (hid->claimed & HID_CLAIMED_INPUT)
920                 hidinput_disconnect(hid);
921         if (hid->claimed & HID_CLAIMED_HIDDEV)
922                 hiddev_disconnect(hid);
923         if (hid->claimed & HID_CLAIMED_HIDRAW)
924                 hidraw_disconnect(hid);
925
926         hid->claimed = 0;
927
928         usb_free_urb(usbhid->urbin);
929         usb_free_urb(usbhid->urbctrl);
930         usb_free_urb(usbhid->urbout);
931         usbhid->urbin = NULL; /* don't mess up next start */
932         usbhid->urbctrl = NULL;
933         usbhid->urbout = NULL;
934
935         hid_free_buffers(hid_to_usb_dev(hid), hid);
936 }
937
938 static struct hid_ll_driver usb_hid_driver = {
939         .parse = usbhid_parse,
940         .start = usbhid_start,
941         .stop = usbhid_stop,
942         .open = usbhid_open,
943         .close = usbhid_close,
944         .hidinput_input_event = usb_hidinput_input_event,
945 };
946
947 static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
948 {
949         struct usb_host_interface *interface = intf->cur_altsetting;
950         struct usb_device *dev = interface_to_usbdev(intf);
951         struct usbhid_device *usbhid;
952         struct hid_device *hid;
953         unsigned int n, has_in = 0;
954         size_t len;
955         int ret;
956
957         dbg_hid("HID probe called for ifnum %d\n",
958                         intf->altsetting->desc.bInterfaceNumber);
959
960         for (n = 0; n < interface->desc.bNumEndpoints; n++)
961                 if (usb_endpoint_is_int_in(&interface->endpoint[n].desc))
962                         has_in++;
963         if (!has_in) {
964                 dev_err(&intf->dev, "couldn't find an input interrupt "
965                                 "endpoint\n");
966                 return -ENODEV;
967         }
968
969         hid = hid_allocate_device();
970         if (IS_ERR(hid))
971                 return PTR_ERR(hid);
972
973         usb_set_intfdata(intf, hid);
974         hid->ll_driver = &usb_hid_driver;
975         hid->hid_output_raw_report = usbhid_output_raw_report;
976         hid->ff_init = hid_pidff_init;
977 #ifdef CONFIG_USB_HIDDEV
978         hid->hiddev_connect = hiddev_connect;
979         hid->hiddev_hid_event = hiddev_hid_event;
980         hid->hiddev_report_event = hiddev_report_event;
981 #endif
982         hid->dev.parent = &intf->dev;
983         hid->bus = BUS_USB;
984         hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
985         hid->product = le16_to_cpu(dev->descriptor.idProduct);
986         hid->name[0] = 0;
987         if (intf->cur_altsetting->desc.bInterfaceProtocol ==
988                         USB_INTERFACE_PROTOCOL_MOUSE)
989                 hid->type = HID_TYPE_USBMOUSE;
990
991         if (dev->manufacturer)
992                 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
993
994         if (dev->product) {
995                 if (dev->manufacturer)
996                         strlcat(hid->name, " ", sizeof(hid->name));
997                 strlcat(hid->name, dev->product, sizeof(hid->name));
998         }
999
1000         if (!strlen(hid->name))
1001                 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1002                          le16_to_cpu(dev->descriptor.idVendor),
1003                          le16_to_cpu(dev->descriptor.idProduct));
1004
1005         usb_make_path(dev, hid->phys, sizeof(hid->phys));
1006         strlcat(hid->phys, "/input", sizeof(hid->phys));
1007         len = strlen(hid->phys);
1008         if (len < sizeof(hid->phys) - 1)
1009                 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1010                          "%d", intf->altsetting[0].desc.bInterfaceNumber);
1011
1012         if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1013                 hid->uniq[0] = 0;
1014
1015         usbhid = kzalloc(sizeof(*usbhid), GFP_KERNEL);
1016         if (usbhid == NULL) {
1017                 ret = -ENOMEM;
1018                 goto err;
1019         }
1020
1021         hid->driver_data = usbhid;
1022         usbhid->hid = hid;
1023
1024         ret = hid_add_device(hid);
1025         if (ret) {
1026                 if (ret != -ENODEV)
1027                         dev_err(&intf->dev, "can't add hid device: %d\n", ret);
1028                 goto err_free;
1029         }
1030
1031         return 0;
1032 err_free:
1033         kfree(usbhid);
1034 err:
1035         hid_destroy_device(hid);
1036         return ret;
1037 }
1038
1039 static void hid_disconnect(struct usb_interface *intf)
1040 {
1041         struct hid_device *hid = usb_get_intfdata(intf);
1042         struct usbhid_device *usbhid;
1043
1044         if (WARN_ON(!hid))
1045                 return;
1046
1047         usbhid = hid->driver_data;
1048         hid_destroy_device(hid);
1049         kfree(usbhid);
1050 }
1051
1052 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1053 {
1054         struct hid_device *hid = usb_get_intfdata (intf);
1055         struct usbhid_device *usbhid = hid->driver_data;
1056
1057         if (!test_bit(HID_STARTED, &usbhid->iofl))
1058                 return 0;
1059
1060         spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
1061         set_bit(HID_SUSPENDED, &usbhid->iofl);
1062         spin_unlock_irq(&usbhid->inlock);
1063         del_timer_sync(&usbhid->io_retry);
1064         usb_kill_urb(usbhid->urbin);
1065         dev_dbg(&intf->dev, "suspend\n");
1066         return 0;
1067 }
1068
1069 static int hid_resume(struct usb_interface *intf)
1070 {
1071         struct hid_device *hid = usb_get_intfdata (intf);
1072         struct usbhid_device *usbhid = hid->driver_data;
1073         int status;
1074
1075         if (!test_bit(HID_STARTED, &usbhid->iofl))
1076                 return 0;
1077
1078         clear_bit(HID_SUSPENDED, &usbhid->iofl);
1079         usbhid->retry_delay = 0;
1080         status = hid_start_in(hid);
1081         dev_dbg(&intf->dev, "resume status %d\n", status);
1082         return status;
1083 }
1084
1085 /* Treat USB reset pretty much the same as suspend/resume */
1086 static int hid_pre_reset(struct usb_interface *intf)
1087 {
1088         /* FIXME: What if the interface is already suspended? */
1089         hid_suspend(intf, PMSG_ON);
1090         return 0;
1091 }
1092
1093 /* Same routine used for post_reset and reset_resume */
1094 static int hid_post_reset(struct usb_interface *intf)
1095 {
1096         struct usb_device *dev = interface_to_usbdev (intf);
1097
1098         hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1099         /* FIXME: Any more reinitialization needed? */
1100
1101         return hid_resume(intf);
1102 }
1103
1104 static struct usb_device_id hid_usb_ids [] = {
1105         { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1106                 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1107         { }                                             /* Terminating entry */
1108 };
1109
1110 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1111
1112 static struct usb_driver hid_driver = {
1113         .name =         "usbhid",
1114         .probe =        hid_probe,
1115         .disconnect =   hid_disconnect,
1116         .suspend =      hid_suspend,
1117         .resume =       hid_resume,
1118         .reset_resume = hid_post_reset,
1119         .pre_reset =    hid_pre_reset,
1120         .post_reset =   hid_post_reset,
1121         .id_table =     hid_usb_ids,
1122         .supports_autosuspend = 1,
1123 };
1124
1125 static const struct hid_device_id hid_usb_table[] = {
1126         { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1127         { }
1128 };
1129
1130 static struct hid_driver hid_usb_driver = {
1131         .name = "generic-usb",
1132         .id_table = hid_usb_table,
1133 };
1134
1135 static int __init hid_init(void)
1136 {
1137         int retval;
1138         retval = hid_register_driver(&hid_usb_driver);
1139         if (retval)
1140                 goto hid_register_fail;
1141         retval = usbhid_quirks_init(quirks_param);
1142         if (retval)
1143                 goto usbhid_quirks_init_fail;
1144         retval = hiddev_init();
1145         if (retval)
1146                 goto hiddev_init_fail;
1147         retval = usb_register(&hid_driver);
1148         if (retval)
1149                 goto usb_register_fail;
1150         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1151                         DRIVER_DESC "\n");
1152
1153         return 0;
1154 usb_register_fail:
1155         hiddev_exit();
1156 hiddev_init_fail:
1157         usbhid_quirks_exit();
1158 usbhid_quirks_init_fail:
1159         hid_unregister_driver(&hid_usb_driver);
1160 hid_register_fail:
1161         return retval;
1162 }
1163
1164 static void __exit hid_exit(void)
1165 {
1166         usb_deregister(&hid_driver);
1167         hiddev_exit();
1168         usbhid_quirks_exit();
1169         hid_unregister_driver(&hid_usb_driver);
1170 }
1171
1172 module_init(hid_init);
1173 module_exit(hid_exit);
1174
1175 MODULE_AUTHOR(DRIVER_AUTHOR);
1176 MODULE_DESCRIPTION(DRIVER_DESC);
1177 MODULE_LICENSE(DRIVER_LICENSE);