2 * USB HID support for Linux
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
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)
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>
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>
30 #include <linux/usb.h>
32 #include <linux/hid.h>
33 #include <linux/hiddev.h>
34 #include <linux/hid-debug.h>
35 #include <linux/hidraw.h>
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"
47 static char *hid_types[] = {"Device", "Pointer", "Mouse", "Device", "Joystick",
48 "Gamepad", "Keyboard", "Keypad", "Multi-Axis Controller"};
53 static unsigned int hid_mousepoll_interval;
54 module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
55 MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
57 /* Quirks specified at module load time */
58 static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
59 module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
60 MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
61 " quirks=vendorID:productID:quirks"
62 " where vendorID, productID, and quirks are all in"
65 * Input submission and I/O error handler.
68 static void hid_io_error(struct hid_device *hid);
70 /* Start up the input URB */
71 static int hid_start_in(struct hid_device *hid)
75 struct usbhid_device *usbhid = hid->driver_data;
77 spin_lock_irqsave(&usbhid->inlock, flags);
78 if (hid->open > 0 && !test_bit(HID_SUSPENDED, &usbhid->iofl) &&
79 !test_bit(HID_DISCONNECTED, &usbhid->iofl) &&
80 !test_and_set_bit(HID_IN_RUNNING, &usbhid->iofl)) {
81 rc = usb_submit_urb(usbhid->urbin, GFP_ATOMIC);
83 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
85 spin_unlock_irqrestore(&usbhid->inlock, flags);
89 /* I/O retry timer routine */
90 static void hid_retry_timeout(unsigned long _hid)
92 struct hid_device *hid = (struct hid_device *) _hid;
93 struct usbhid_device *usbhid = hid->driver_data;
95 dev_dbg(&usbhid->intf->dev, "retrying intr urb\n");
96 if (hid_start_in(hid))
100 /* Workqueue routine to reset the device or clear a halt */
101 static void hid_reset(struct work_struct *work)
103 struct usbhid_device *usbhid =
104 container_of(work, struct usbhid_device, reset_work);
105 struct hid_device *hid = usbhid->hid;
108 if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
109 dev_dbg(&usbhid->intf->dev, "clear halt\n");
110 rc = usb_clear_halt(hid_to_usb_dev(hid), usbhid->urbin->pipe);
111 clear_bit(HID_CLEAR_HALT, &usbhid->iofl);
115 else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
116 dev_dbg(&usbhid->intf->dev, "resetting device\n");
117 rc = rc_lock = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
119 rc = usb_reset_device(hid_to_usb_dev(hid));
121 usb_unlock_device(hid_to_usb_dev(hid));
123 clear_bit(HID_RESET_PENDING, &usbhid->iofl);
128 if (!test_bit(HID_IN_RUNNING, &usbhid->iofl))
132 err_hid("can't reset device, %s-%s/input%d, status %d",
133 hid_to_usb_dev(hid)->bus->bus_name,
134 hid_to_usb_dev(hid)->devpath,
144 /* Main I/O error handler */
145 static void hid_io_error(struct hid_device *hid)
148 struct usbhid_device *usbhid = hid->driver_data;
150 spin_lock_irqsave(&usbhid->inlock, flags);
152 /* Stop when disconnected */
153 if (test_bit(HID_DISCONNECTED, &usbhid->iofl))
156 /* If it has been a while since the last error, we'll assume
157 * this a brand new error and reset the retry timeout. */
158 if (time_after(jiffies, usbhid->stop_retry + HZ/2))
159 usbhid->retry_delay = 0;
161 /* When an error occurs, retry at increasing intervals */
162 if (usbhid->retry_delay == 0) {
163 usbhid->retry_delay = 13; /* Then 26, 52, 104, 104, ... */
164 usbhid->stop_retry = jiffies + msecs_to_jiffies(1000);
165 } else if (usbhid->retry_delay < 100)
166 usbhid->retry_delay *= 2;
168 if (time_after(jiffies, usbhid->stop_retry)) {
170 /* Retries failed, so do a port reset */
171 if (!test_and_set_bit(HID_RESET_PENDING, &usbhid->iofl)) {
172 schedule_work(&usbhid->reset_work);
177 mod_timer(&usbhid->io_retry,
178 jiffies + msecs_to_jiffies(usbhid->retry_delay));
180 spin_unlock_irqrestore(&usbhid->inlock, flags);
184 * Input interrupt completion handler.
187 static void hid_irq_in(struct urb *urb)
189 struct hid_device *hid = urb->context;
190 struct usbhid_device *usbhid = hid->driver_data;
193 switch (urb->status) {
194 case 0: /* success */
195 usbhid->retry_delay = 0;
196 hid_input_report(urb->context, HID_INPUT_REPORT,
197 urb->transfer_buffer,
198 urb->actual_length, 1);
200 case -EPIPE: /* stall */
201 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
202 set_bit(HID_CLEAR_HALT, &usbhid->iofl);
203 schedule_work(&usbhid->reset_work);
205 case -ECONNRESET: /* unlink */
207 case -ESHUTDOWN: /* unplug */
208 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
210 case -EILSEQ: /* protocol error or unplug */
211 case -EPROTO: /* protocol error or unplug */
212 case -ETIME: /* protocol error or unplug */
213 case -ETIMEDOUT: /* Should never happen, but... */
214 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
218 warn("input irq status %d received", urb->status);
221 status = usb_submit_urb(urb, GFP_ATOMIC);
223 clear_bit(HID_IN_RUNNING, &usbhid->iofl);
224 if (status != -EPERM) {
225 err_hid("can't resubmit intr, %s-%s/input%d, status %d",
226 hid_to_usb_dev(hid)->bus->bus_name,
227 hid_to_usb_dev(hid)->devpath,
228 usbhid->ifnum, status);
234 static int hid_submit_out(struct hid_device *hid)
236 struct hid_report *report;
237 struct usbhid_device *usbhid = hid->driver_data;
239 report = usbhid->out[usbhid->outtail];
241 hid_output_report(report, usbhid->outbuf);
242 usbhid->urbout->transfer_buffer_length = ((report->size - 1) >> 3) + 1 + (report->id > 0);
243 usbhid->urbout->dev = hid_to_usb_dev(hid);
245 dbg_hid("submitting out urb\n");
247 if (usb_submit_urb(usbhid->urbout, GFP_ATOMIC)) {
248 err_hid("usb_submit_urb(out) failed");
255 static int hid_submit_ctrl(struct hid_device *hid)
257 struct hid_report *report;
260 struct usbhid_device *usbhid = hid->driver_data;
262 report = usbhid->ctrl[usbhid->ctrltail].report;
263 dir = usbhid->ctrl[usbhid->ctrltail].dir;
265 len = ((report->size - 1) >> 3) + 1 + (report->id > 0);
266 if (dir == USB_DIR_OUT) {
267 hid_output_report(report, usbhid->ctrlbuf);
268 usbhid->urbctrl->pipe = usb_sndctrlpipe(hid_to_usb_dev(hid), 0);
269 usbhid->urbctrl->transfer_buffer_length = len;
271 int maxpacket, padlen;
273 usbhid->urbctrl->pipe = usb_rcvctrlpipe(hid_to_usb_dev(hid), 0);
274 maxpacket = usb_maxpacket(hid_to_usb_dev(hid), usbhid->urbctrl->pipe, 0);
276 padlen = DIV_ROUND_UP(len, maxpacket);
278 if (padlen > usbhid->bufsize)
279 padlen = usbhid->bufsize;
282 usbhid->urbctrl->transfer_buffer_length = padlen;
284 usbhid->urbctrl->dev = hid_to_usb_dev(hid);
286 usbhid->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE | dir;
287 usbhid->cr->bRequest = (dir == USB_DIR_OUT) ? HID_REQ_SET_REPORT : HID_REQ_GET_REPORT;
288 usbhid->cr->wValue = cpu_to_le16(((report->type + 1) << 8) | report->id);
289 usbhid->cr->wIndex = cpu_to_le16(usbhid->ifnum);
290 usbhid->cr->wLength = cpu_to_le16(len);
292 dbg_hid("submitting ctrl urb: %s wValue=0x%04x wIndex=0x%04x wLength=%u\n",
293 usbhid->cr->bRequest == HID_REQ_SET_REPORT ? "Set_Report" : "Get_Report",
294 usbhid->cr->wValue, usbhid->cr->wIndex, usbhid->cr->wLength);
296 if (usb_submit_urb(usbhid->urbctrl, GFP_ATOMIC)) {
297 err_hid("usb_submit_urb(ctrl) failed");
305 * Output interrupt completion handler.
308 static void hid_irq_out(struct urb *urb)
310 struct hid_device *hid = urb->context;
311 struct usbhid_device *usbhid = hid->driver_data;
315 switch (urb->status) {
316 case 0: /* success */
318 case -ESHUTDOWN: /* unplug */
320 case -EILSEQ: /* protocol error or unplug */
321 case -EPROTO: /* protocol error or unplug */
322 case -ECONNRESET: /* unlink */
326 warn("output irq status %d received", urb->status);
329 spin_lock_irqsave(&usbhid->outlock, flags);
332 usbhid->outtail = usbhid->outhead;
334 usbhid->outtail = (usbhid->outtail + 1) & (HID_OUTPUT_FIFO_SIZE - 1);
336 if (usbhid->outhead != usbhid->outtail) {
337 if (hid_submit_out(hid)) {
338 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
339 wake_up(&usbhid->wait);
341 spin_unlock_irqrestore(&usbhid->outlock, flags);
345 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
346 spin_unlock_irqrestore(&usbhid->outlock, flags);
347 wake_up(&usbhid->wait);
351 * Control pipe completion handler.
354 static void hid_ctrl(struct urb *urb)
356 struct hid_device *hid = urb->context;
357 struct usbhid_device *usbhid = hid->driver_data;
361 spin_lock_irqsave(&usbhid->ctrllock, flags);
363 switch (urb->status) {
364 case 0: /* success */
365 if (usbhid->ctrl[usbhid->ctrltail].dir == USB_DIR_IN)
366 hid_input_report(urb->context,
367 usbhid->ctrl[usbhid->ctrltail].report->type,
368 urb->transfer_buffer, urb->actual_length, 0);
370 case -ESHUTDOWN: /* unplug */
372 case -EILSEQ: /* protocol error or unplug */
373 case -EPROTO: /* protocol error or unplug */
374 case -ECONNRESET: /* unlink */
376 case -EPIPE: /* report not available */
379 warn("ctrl urb status %d received", urb->status);
383 usbhid->ctrltail = usbhid->ctrlhead;
385 usbhid->ctrltail = (usbhid->ctrltail + 1) & (HID_CONTROL_FIFO_SIZE - 1);
387 if (usbhid->ctrlhead != usbhid->ctrltail) {
388 if (hid_submit_ctrl(hid)) {
389 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
390 wake_up(&usbhid->wait);
392 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
396 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
397 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
398 wake_up(&usbhid->wait);
401 void usbhid_submit_report(struct hid_device *hid, struct hid_report *report, unsigned char dir)
405 struct usbhid_device *usbhid = hid->driver_data;
407 if ((hid->quirks & HID_QUIRK_NOGET) && dir == USB_DIR_IN)
410 if (usbhid->urbout && dir == USB_DIR_OUT && report->type == HID_OUTPUT_REPORT) {
412 spin_lock_irqsave(&usbhid->outlock, flags);
414 if ((head = (usbhid->outhead + 1) & (HID_OUTPUT_FIFO_SIZE - 1)) == usbhid->outtail) {
415 spin_unlock_irqrestore(&usbhid->outlock, flags);
416 warn("output queue full");
420 usbhid->out[usbhid->outhead] = report;
421 usbhid->outhead = head;
423 if (!test_and_set_bit(HID_OUT_RUNNING, &usbhid->iofl))
424 if (hid_submit_out(hid))
425 clear_bit(HID_OUT_RUNNING, &usbhid->iofl);
427 spin_unlock_irqrestore(&usbhid->outlock, flags);
431 spin_lock_irqsave(&usbhid->ctrllock, flags);
433 if ((head = (usbhid->ctrlhead + 1) & (HID_CONTROL_FIFO_SIZE - 1)) == usbhid->ctrltail) {
434 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
435 warn("control queue full");
439 usbhid->ctrl[usbhid->ctrlhead].report = report;
440 usbhid->ctrl[usbhid->ctrlhead].dir = dir;
441 usbhid->ctrlhead = head;
443 if (!test_and_set_bit(HID_CTRL_RUNNING, &usbhid->iofl))
444 if (hid_submit_ctrl(hid))
445 clear_bit(HID_CTRL_RUNNING, &usbhid->iofl);
447 spin_unlock_irqrestore(&usbhid->ctrllock, flags);
450 static int usb_hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
452 struct hid_device *hid = input_get_drvdata(dev);
453 struct hid_field *field;
457 return input_ff_event(dev, type, code, value);
462 if ((offset = hidinput_find_field(hid, type, code, &field)) == -1) {
463 warn("event field not found");
467 hid_set_field(field, offset, value);
468 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
473 int usbhid_wait_io(struct hid_device *hid)
475 struct usbhid_device *usbhid = hid->driver_data;
477 if (!wait_event_timeout(usbhid->wait,
478 (!test_bit(HID_CTRL_RUNNING, &usbhid->iofl) &&
479 !test_bit(HID_OUT_RUNNING, &usbhid->iofl)),
481 dbg_hid("timeout waiting for ctrl or out queue to clear\n");
488 static int hid_set_idle(struct usb_device *dev, int ifnum, int report, int idle)
490 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
491 HID_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, (idle << 8) | report,
492 ifnum, NULL, 0, USB_CTRL_SET_TIMEOUT);
495 static int hid_get_class_descriptor(struct usb_device *dev, int ifnum,
496 unsigned char type, void *buf, int size)
498 int result, retries = 4;
500 memset(buf, 0, size);
503 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
504 USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
505 (type << 8), ifnum, buf, size, USB_CTRL_GET_TIMEOUT);
507 } while (result < size && retries);
511 int usbhid_open(struct hid_device *hid)
513 struct usbhid_device *usbhid = hid->driver_data;
517 res = usb_autopm_get_interface(usbhid->intf);
523 if (hid_start_in(hid))
528 void usbhid_close(struct hid_device *hid)
530 struct usbhid_device *usbhid = hid->driver_data;
533 usb_kill_urb(usbhid->urbin);
534 usb_autopm_put_interface(usbhid->intf);
539 * Initialize all reports
542 void usbhid_init_reports(struct hid_device *hid)
544 struct hid_report *report;
545 struct usbhid_device *usbhid = hid->driver_data;
548 list_for_each_entry(report, &hid->report_enum[HID_INPUT_REPORT].report_list, list)
549 usbhid_submit_report(hid, report, USB_DIR_IN);
551 list_for_each_entry(report, &hid->report_enum[HID_FEATURE_REPORT].report_list, list)
552 usbhid_submit_report(hid, report, USB_DIR_IN);
555 ret = usbhid_wait_io(hid);
558 if (test_bit(HID_CTRL_RUNNING, &usbhid->iofl))
559 usb_kill_urb(usbhid->urbctrl);
560 if (test_bit(HID_OUT_RUNNING, &usbhid->iofl))
561 usb_kill_urb(usbhid->urbout);
562 ret = usbhid_wait_io(hid);
566 warn("timeout initializing reports");
570 * Reset LEDs which BIOS might have left on. For now, just NumLock (0x01).
572 static int hid_find_field_early(struct hid_device *hid, unsigned int page,
573 unsigned int hid_code, struct hid_field **pfield)
575 struct hid_report *report;
576 struct hid_field *field;
577 struct hid_usage *usage;
580 list_for_each_entry(report, &hid->report_enum[HID_OUTPUT_REPORT].report_list, list) {
581 for (i = 0; i < report->maxfield; i++) {
582 field = report->field[i];
583 for (j = 0; j < field->maxusage; j++) {
584 usage = &field->usage[j];
585 if ((usage->hid & HID_USAGE_PAGE) == page &&
586 (usage->hid & 0xFFFF) == hid_code) {
596 static void usbhid_set_leds(struct hid_device *hid)
598 struct hid_field *field;
601 if ((offset = hid_find_field_early(hid, HID_UP_LED, 0x01, &field)) != -1) {
602 hid_set_field(field, offset, 0);
603 usbhid_submit_report(hid, field->report, USB_DIR_OUT);
608 * Traverse the supplied list of reports and find the longest
610 static void hid_find_max_report(struct hid_device *hid, unsigned int type,
613 struct hid_report *report;
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)
625 static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid)
627 struct usbhid_device *usbhid = hid->driver_data;
629 if (!(usbhid->inbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->inbuf_dma)))
631 if (!(usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->outbuf_dma)))
633 if (!(usbhid->cr = usb_buffer_alloc(dev, sizeof(*(usbhid->cr)), GFP_ATOMIC, &usbhid->cr_dma)))
635 if (!(usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_ATOMIC, &usbhid->ctrlbuf_dma)))
641 static int usbhid_output_raw_report(struct hid_device *hid, __u8 *buf, size_t count)
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;
649 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
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);
656 /* count also the report id */
663 static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid)
665 struct usbhid_device *usbhid = hid->driver_data;
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);
673 static int usbhid_start_finish(struct hid_device *hid)
675 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
676 char path[64], *type;
679 usbhid_init_reports(hid);
680 hid_dump_device(hid);
681 if (hid->quirks & HID_QUIRK_RESET_LEDS)
682 usbhid_set_leds(hid);
684 if (!hidinput_connect(hid))
685 hid->claimed |= HID_CLAIMED_INPUT;
686 if (!hiddev_connect(hid))
687 hid->claimed |= HID_CLAIMED_HIDDEV;
688 if (!hidraw_connect(hid))
689 hid->claimed |= HID_CLAIMED_HIDRAW;
692 printk(KERN_ERR "HID device claimed by neither input, hiddev "
697 if ((hid->claimed & HID_CLAIMED_INPUT))
702 if (hid->claimed & HID_CLAIMED_INPUT)
704 if ((hid->claimed & HID_CLAIMED_INPUT) &&
705 ((hid->claimed & HID_CLAIMED_HIDDEV) ||
706 hid->claimed & HID_CLAIMED_HIDRAW))
708 if (hid->claimed & HID_CLAIMED_HIDDEV)
709 printk("hiddev%d", hid->minor);
710 if ((hid->claimed & HID_CLAIMED_INPUT) &&
711 (hid->claimed & HID_CLAIMED_HIDDEV) &&
712 (hid->claimed & HID_CLAIMED_HIDRAW))
714 if (hid->claimed & HID_CLAIMED_HIDRAW)
715 printk("hidraw%d", ((struct hidraw *)hid->hidraw)->minor);
718 for (i = 0; i < hid->maxcollection; i++) {
719 if (hid->collection[i].type == HID_COLLECTION_APPLICATION &&
720 (hid->collection[i].usage & HID_USAGE_PAGE) ==
722 (hid->collection[i].usage & 0xffff) <
723 ARRAY_SIZE(hid_types)) {
724 type = hid_types[hid->collection[i].usage & 0xffff];
729 usb_make_path(interface_to_usbdev(intf), path, 63);
731 printk(": USB HID v%x.%02x %s [%s] on %s\n",
732 hid->version >> 8, hid->version & 0xff, type, hid->name, path);
737 static int usbhid_parse(struct hid_device *hid)
739 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
740 struct usb_host_interface *interface = intf->cur_altsetting;
741 struct usb_device *dev = interface_to_usbdev (intf);
742 struct hid_descriptor *hdesc;
744 unsigned int rsize = 0;
748 quirks = usbhid_lookup_quirk(le16_to_cpu(dev->descriptor.idVendor),
749 le16_to_cpu(dev->descriptor.idProduct));
751 /* Many keyboards and mice don't like to be polled for reports,
752 * so we will always set the HID_QUIRK_NOGET flag for them. */
753 if (interface->desc.bInterfaceSubClass == USB_INTERFACE_SUBCLASS_BOOT) {
754 if (interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_KEYBOARD ||
755 interface->desc.bInterfaceProtocol == USB_INTERFACE_PROTOCOL_MOUSE)
756 quirks |= HID_QUIRK_NOGET;
759 if (usb_get_extra_descriptor(interface, HID_DT_HID, &hdesc) &&
760 (!interface->desc.bNumEndpoints ||
761 usb_get_extra_descriptor(&interface->endpoint[0], HID_DT_HID, &hdesc))) {
762 dbg_hid("class descriptor not present\n");
766 hid->version = le16_to_cpu(hdesc->bcdHID);
767 hid->country = hdesc->bCountryCode;
769 for (n = 0; n < hdesc->bNumDescriptors; n++)
770 if (hdesc->desc[n].bDescriptorType == HID_DT_REPORT)
771 rsize = le16_to_cpu(hdesc->desc[n].wDescriptorLength);
773 if (!rsize || rsize > HID_MAX_DESCRIPTOR_SIZE) {
774 dbg_hid("weird size of report descriptor (%u)\n", rsize);
778 if (!(rdesc = kmalloc(rsize, GFP_KERNEL))) {
779 dbg_hid("couldn't allocate rdesc memory\n");
783 hid_set_idle(dev, interface->desc.bInterfaceNumber, 0, 0);
785 ret = hid_get_class_descriptor(dev, interface->desc.bInterfaceNumber,
786 HID_DT_REPORT, rdesc, rsize);
788 dbg_hid("reading report descriptor failed\n");
793 dbg_hid("report descriptor (size %u, read %d) = ", rsize, n);
794 for (n = 0; n < rsize; n++)
795 dbg_hid_line(" %02x", (unsigned char) rdesc[n]);
798 ret = hid_parse_report(hid, rdesc, rsize);
801 dbg_hid("parsing report descriptor failed\n");
805 hid->quirks = quirks;
812 static int usbhid_start(struct hid_device *hid)
814 struct usb_interface *intf = to_usb_interface(hid->dev.parent);
815 struct usb_host_interface *interface = intf->cur_altsetting;
816 struct usb_device *dev = interface_to_usbdev(intf);
817 struct usbhid_device *usbhid;
818 unsigned int n, insize = 0;
821 WARN_ON(hid->driver_data);
823 usbhid = kzalloc(sizeof(struct usbhid_device), GFP_KERNEL);
824 if (usbhid == NULL) {
829 hid->driver_data = usbhid;
832 usbhid->bufsize = HID_MIN_BUFFER_SIZE;
833 hid_find_max_report(hid, HID_INPUT_REPORT, &usbhid->bufsize);
834 hid_find_max_report(hid, HID_OUTPUT_REPORT, &usbhid->bufsize);
835 hid_find_max_report(hid, HID_FEATURE_REPORT, &usbhid->bufsize);
837 if (usbhid->bufsize > HID_MAX_BUFFER_SIZE)
838 usbhid->bufsize = HID_MAX_BUFFER_SIZE;
840 hid_find_max_report(hid, HID_INPUT_REPORT, &insize);
842 if (insize > HID_MAX_BUFFER_SIZE)
843 insize = HID_MAX_BUFFER_SIZE;
845 if (hid_alloc_buffers(dev, hid)) {
850 for (n = 0; n < interface->desc.bNumEndpoints; n++) {
851 struct usb_endpoint_descriptor *endpoint;
855 endpoint = &interface->endpoint[n].desc;
856 if ((endpoint->bmAttributes & 3) != 3) /* Not an interrupt endpoint */
859 interval = endpoint->bInterval;
861 /* Some vendors give fullspeed interval on highspeed devides */
862 if (hid->quirks & HID_QUIRK_FULLSPEED_INTERVAL &&
863 dev->speed == USB_SPEED_HIGH) {
864 interval = fls(endpoint->bInterval*8);
865 printk(KERN_INFO "%s: Fixing fullspeed to highspeed interval: %d -> %d\n",
866 hid->name, endpoint->bInterval, interval);
869 /* Change the polling interval of mice. */
870 if (hid->collection->usage == HID_GD_MOUSE && hid_mousepoll_interval > 0)
871 interval = hid_mousepoll_interval;
874 if (usb_endpoint_dir_in(endpoint)) {
877 if (!(usbhid->urbin = usb_alloc_urb(0, GFP_KERNEL)))
879 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
880 usb_fill_int_urb(usbhid->urbin, dev, pipe, usbhid->inbuf, insize,
881 hid_irq_in, hid, interval);
882 usbhid->urbin->transfer_dma = usbhid->inbuf_dma;
883 usbhid->urbin->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
887 if (!(usbhid->urbout = usb_alloc_urb(0, GFP_KERNEL)))
889 pipe = usb_sndintpipe(dev, endpoint->bEndpointAddress);
890 usb_fill_int_urb(usbhid->urbout, dev, pipe, usbhid->outbuf, 0,
891 hid_irq_out, hid, interval);
892 usbhid->urbout->transfer_dma = usbhid->outbuf_dma;
893 usbhid->urbout->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
897 if (!usbhid->urbin) {
898 err_hid("couldn't find an input interrupt endpoint");
903 init_waitqueue_head(&usbhid->wait);
904 INIT_WORK(&usbhid->reset_work, hid_reset);
905 setup_timer(&usbhid->io_retry, hid_retry_timeout, (unsigned long) hid);
907 spin_lock_init(&usbhid->inlock);
908 spin_lock_init(&usbhid->outlock);
909 spin_lock_init(&usbhid->ctrllock);
912 usbhid->ifnum = interface->desc.bInterfaceNumber;
914 usbhid->urbctrl = usb_alloc_urb(0, GFP_KERNEL);
915 if (!usbhid->urbctrl) {
920 usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr,
921 usbhid->ctrlbuf, 1, hid_ctrl, hid);
922 usbhid->urbctrl->setup_dma = usbhid->cr_dma;
923 usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma;
924 usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
926 ret = usbhid_start_finish(hid);
933 usb_free_urb(usbhid->urbin);
934 usb_free_urb(usbhid->urbout);
935 usb_free_urb(usbhid->urbctrl);
936 hid_free_buffers(dev, hid);
942 static void usbhid_stop(struct hid_device *hid)
944 struct usbhid_device *usbhid = hid->driver_data;
946 if (WARN_ON(!usbhid))
949 spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
950 set_bit(HID_DISCONNECTED, &usbhid->iofl);
951 spin_unlock_irq(&usbhid->inlock);
952 usb_kill_urb(usbhid->urbin);
953 usb_kill_urb(usbhid->urbout);
954 usb_kill_urb(usbhid->urbctrl);
956 del_timer_sync(&usbhid->io_retry);
957 cancel_work_sync(&usbhid->reset_work);
959 if (hid->claimed & HID_CLAIMED_INPUT)
960 hidinput_disconnect(hid);
961 if (hid->claimed & HID_CLAIMED_HIDDEV)
962 hiddev_disconnect(hid);
963 if (hid->claimed & HID_CLAIMED_HIDRAW)
964 hidraw_disconnect(hid);
968 usb_free_urb(usbhid->urbin);
969 usb_free_urb(usbhid->urbctrl);
970 usb_free_urb(usbhid->urbout);
972 hid_free_buffers(hid_to_usb_dev(hid), hid);
974 hid->driver_data = NULL;
977 static struct hid_ll_driver usb_hid_driver = {
978 .parse = usbhid_parse,
979 .start = usbhid_start,
982 .close = usbhid_close,
983 .hidinput_input_event = usb_hidinput_input_event,
986 static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
988 struct usb_device *dev = interface_to_usbdev(intf);
989 struct hid_device *hid;
993 dbg_hid("HID probe called for ifnum %d\n",
994 intf->altsetting->desc.bInterfaceNumber);
996 hid = hid_allocate_device();
1000 usb_set_intfdata(intf, hid);
1001 hid->ll_driver = &usb_hid_driver;
1002 hid->hid_output_raw_report = usbhid_output_raw_report;
1003 #ifdef CONFIG_USB_HIDDEV
1004 hid->hiddev_hid_event = hiddev_hid_event;
1005 hid->hiddev_report_event = hiddev_report_event;
1007 hid->dev.parent = &intf->dev;
1009 hid->vendor = le16_to_cpu(dev->descriptor.idVendor);
1010 hid->product = le16_to_cpu(dev->descriptor.idProduct);
1013 if (dev->manufacturer)
1014 strlcpy(hid->name, dev->manufacturer, sizeof(hid->name));
1017 if (dev->manufacturer)
1018 strlcat(hid->name, " ", sizeof(hid->name));
1019 strlcat(hid->name, dev->product, sizeof(hid->name));
1022 if (!strlen(hid->name))
1023 snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x",
1024 le16_to_cpu(dev->descriptor.idVendor),
1025 le16_to_cpu(dev->descriptor.idProduct));
1027 usb_make_path(dev, hid->phys, sizeof(hid->phys));
1028 strlcat(hid->phys, "/input", sizeof(hid->phys));
1029 len = strlen(hid->phys);
1030 if (len < sizeof(hid->phys) - 1)
1031 snprintf(hid->phys + len, sizeof(hid->phys) - len,
1032 "%d", intf->altsetting[0].desc.bInterfaceNumber);
1034 if (usb_string(dev, dev->descriptor.iSerialNumber, hid->uniq, 64) <= 0)
1037 ret = hid_add_device(hid);
1040 dev_err(&intf->dev, "can't add hid device: %d\n", ret);
1046 hid_destroy_device(hid);
1050 static void hid_disconnect(struct usb_interface *intf)
1052 struct hid_device *hid = usb_get_intfdata(intf);
1057 hid_destroy_device(hid);
1060 static int hid_suspend(struct usb_interface *intf, pm_message_t message)
1062 struct hid_device *hid = usb_get_intfdata (intf);
1063 struct usbhid_device *usbhid = hid->driver_data;
1065 spin_lock_irq(&usbhid->inlock); /* Sync with error handler */
1066 set_bit(HID_SUSPENDED, &usbhid->iofl);
1067 spin_unlock_irq(&usbhid->inlock);
1068 del_timer(&usbhid->io_retry);
1069 usb_kill_urb(usbhid->urbin);
1070 dev_dbg(&intf->dev, "suspend\n");
1074 static int hid_resume(struct usb_interface *intf)
1076 struct hid_device *hid = usb_get_intfdata (intf);
1077 struct usbhid_device *usbhid = hid->driver_data;
1080 clear_bit(HID_SUSPENDED, &usbhid->iofl);
1081 usbhid->retry_delay = 0;
1082 status = hid_start_in(hid);
1083 dev_dbg(&intf->dev, "resume status %d\n", status);
1087 /* Treat USB reset pretty much the same as suspend/resume */
1088 static int hid_pre_reset(struct usb_interface *intf)
1090 /* FIXME: What if the interface is already suspended? */
1091 hid_suspend(intf, PMSG_ON);
1095 /* Same routine used for post_reset and reset_resume */
1096 static int hid_post_reset(struct usb_interface *intf)
1098 struct usb_device *dev = interface_to_usbdev (intf);
1100 hid_set_idle(dev, intf->cur_altsetting->desc.bInterfaceNumber, 0, 0);
1101 /* FIXME: Any more reinitialization needed? */
1103 return hid_resume(intf);
1106 static struct usb_device_id hid_usb_ids [] = {
1107 { .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
1108 .bInterfaceClass = USB_INTERFACE_CLASS_HID },
1109 { } /* Terminating entry */
1112 MODULE_DEVICE_TABLE (usb, hid_usb_ids);
1114 static struct usb_driver hid_driver = {
1117 .disconnect = hid_disconnect,
1118 .suspend = hid_suspend,
1119 .resume = hid_resume,
1120 .reset_resume = hid_post_reset,
1121 .pre_reset = hid_pre_reset,
1122 .post_reset = hid_post_reset,
1123 .id_table = hid_usb_ids,
1124 .supports_autosuspend = 1,
1127 static const struct hid_device_id hid_usb_table[] = {
1128 { HID_USB_DEVICE(HID_ANY_ID, HID_ANY_ID) },
1132 static struct hid_driver hid_usb_driver = {
1133 .name = "generic-usb",
1134 .id_table = hid_usb_table,
1137 static int __init hid_init(void)
1140 retval = hid_register_driver(&hid_usb_driver);
1142 goto hid_register_fail;
1143 retval = usbhid_quirks_init(quirks_param);
1145 goto usbhid_quirks_init_fail;
1146 retval = hiddev_init();
1148 goto hiddev_init_fail;
1149 retval = usb_register(&hid_driver);
1151 goto usb_register_fail;
1152 info(DRIVER_VERSION ":" DRIVER_DESC);
1158 usbhid_quirks_exit();
1159 usbhid_quirks_init_fail:
1160 hid_unregister_driver(&hid_usb_driver);
1165 static void __exit hid_exit(void)
1167 usb_deregister(&hid_driver);
1169 usbhid_quirks_exit();
1170 hid_unregister_driver(&hid_usb_driver);
1173 module_init(hid_init);
1174 module_exit(hid_exit);
1176 MODULE_AUTHOR(DRIVER_AUTHOR);
1177 MODULE_DESCRIPTION(DRIVER_DESC);
1178 MODULE_LICENSE(DRIVER_LICENSE);