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Source at commit be977234bfb4a6dca8a39e7c52165e4cd536ad71 created 12 years 9 months ago. By Lars-Peter Clausen, jz4740: Fix compile error | |
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1 | /* |
2 | * f_hid.c -- USB HID function driver |
3 | * |
4 | * Copyright (C) 2010 Fabien Chouteau <fabien.chouteau@barco.com> |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation; either version 2 of the License, or |
9 | * (at your option) any later version. |
10 | * |
11 | * This program is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * GNU General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU General Public License |
17 | * along with this program; if not, write to the Free Software |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | */ |
20 | |
21 | #include <linux/kernel.h> |
22 | #include <linux/utsname.h> |
23 | #include <linux/module.h> |
24 | #include <linux/hid.h> |
25 | #include <linux/cdev.h> |
26 | #include <linux/mutex.h> |
27 | #include <linux/poll.h> |
28 | #include <linux/uaccess.h> |
29 | #include <linux/wait.h> |
30 | #include <linux/usb/g_hid.h> |
31 | |
32 | static int major, minors; |
33 | static struct class *hidg_class; |
34 | |
35 | /*-------------------------------------------------------------------------*/ |
36 | /* HID gadget struct */ |
37 | |
38 | struct f_hidg { |
39 | /* configuration */ |
40 | unsigned char bInterfaceSubClass; |
41 | unsigned char bInterfaceProtocol; |
42 | unsigned short report_desc_length; |
43 | char *report_desc; |
44 | unsigned short report_length; |
45 | |
46 | /* recv report */ |
47 | char *set_report_buff; |
48 | unsigned short set_report_length; |
49 | spinlock_t spinlock; |
50 | wait_queue_head_t read_queue; |
51 | |
52 | /* send report */ |
53 | struct mutex lock; |
54 | bool write_pending; |
55 | wait_queue_head_t write_queue; |
56 | struct usb_request *req; |
57 | |
58 | int minor; |
59 | struct cdev cdev; |
60 | struct usb_function func; |
61 | struct usb_ep *in_ep; |
62 | struct usb_endpoint_descriptor *fs_in_ep_desc; |
63 | struct usb_endpoint_descriptor *hs_in_ep_desc; |
64 | }; |
65 | |
66 | static inline struct f_hidg *func_to_hidg(struct usb_function *f) |
67 | { |
68 | return container_of(f, struct f_hidg, func); |
69 | } |
70 | |
71 | /*-------------------------------------------------------------------------*/ |
72 | /* Static descriptors */ |
73 | |
74 | static struct usb_interface_descriptor hidg_interface_desc = { |
75 | .bLength = sizeof hidg_interface_desc, |
76 | .bDescriptorType = USB_DT_INTERFACE, |
77 | /* .bInterfaceNumber = DYNAMIC */ |
78 | .bAlternateSetting = 0, |
79 | .bNumEndpoints = 1, |
80 | .bInterfaceClass = USB_CLASS_HID, |
81 | /* .bInterfaceSubClass = DYNAMIC */ |
82 | /* .bInterfaceProtocol = DYNAMIC */ |
83 | /* .iInterface = DYNAMIC */ |
84 | }; |
85 | |
86 | static struct hid_descriptor hidg_desc = { |
87 | .bLength = sizeof hidg_desc, |
88 | .bDescriptorType = HID_DT_HID, |
89 | .bcdHID = 0x0101, |
90 | .bCountryCode = 0x00, |
91 | .bNumDescriptors = 0x1, |
92 | /*.desc[0].bDescriptorType = DYNAMIC */ |
93 | /*.desc[0].wDescriptorLenght = DYNAMIC */ |
94 | }; |
95 | |
96 | /* High-Speed Support */ |
97 | |
98 | static struct usb_endpoint_descriptor hidg_hs_in_ep_desc = { |
99 | .bLength = USB_DT_ENDPOINT_SIZE, |
100 | .bDescriptorType = USB_DT_ENDPOINT, |
101 | .bEndpointAddress = USB_DIR_IN, |
102 | .bmAttributes = USB_ENDPOINT_XFER_INT, |
103 | /*.wMaxPacketSize = DYNAMIC */ |
104 | .bInterval = 4, /* FIXME: Add this field in the |
105 | * HID gadget configuration? |
106 | * (struct hidg_func_descriptor) |
107 | */ |
108 | }; |
109 | |
110 | static struct usb_descriptor_header *hidg_hs_descriptors[] = { |
111 | (struct usb_descriptor_header *)&hidg_interface_desc, |
112 | (struct usb_descriptor_header *)&hidg_desc, |
113 | (struct usb_descriptor_header *)&hidg_hs_in_ep_desc, |
114 | NULL, |
115 | }; |
116 | |
117 | /* Full-Speed Support */ |
118 | |
119 | static struct usb_endpoint_descriptor hidg_fs_in_ep_desc = { |
120 | .bLength = USB_DT_ENDPOINT_SIZE, |
121 | .bDescriptorType = USB_DT_ENDPOINT, |
122 | .bEndpointAddress = USB_DIR_IN, |
123 | .bmAttributes = USB_ENDPOINT_XFER_INT, |
124 | /*.wMaxPacketSize = DYNAMIC */ |
125 | .bInterval = 10, /* FIXME: Add this field in the |
126 | * HID gadget configuration? |
127 | * (struct hidg_func_descriptor) |
128 | */ |
129 | }; |
130 | |
131 | static struct usb_descriptor_header *hidg_fs_descriptors[] = { |
132 | (struct usb_descriptor_header *)&hidg_interface_desc, |
133 | (struct usb_descriptor_header *)&hidg_desc, |
134 | (struct usb_descriptor_header *)&hidg_fs_in_ep_desc, |
135 | NULL, |
136 | }; |
137 | |
138 | /*-------------------------------------------------------------------------*/ |
139 | /* Char Device */ |
140 | |
141 | static ssize_t f_hidg_read(struct file *file, char __user *buffer, |
142 | size_t count, loff_t *ptr) |
143 | { |
144 | struct f_hidg *hidg = file->private_data; |
145 | char *tmp_buff = NULL; |
146 | unsigned long flags; |
147 | |
148 | if (!count) |
149 | return 0; |
150 | |
151 | if (!access_ok(VERIFY_WRITE, buffer, count)) |
152 | return -EFAULT; |
153 | |
154 | spin_lock_irqsave(&hidg->spinlock, flags); |
155 | |
156 | #define READ_COND (hidg->set_report_buff != NULL) |
157 | |
158 | while (!READ_COND) { |
159 | spin_unlock_irqrestore(&hidg->spinlock, flags); |
160 | if (file->f_flags & O_NONBLOCK) |
161 | return -EAGAIN; |
162 | |
163 | if (wait_event_interruptible(hidg->read_queue, READ_COND)) |
164 | return -ERESTARTSYS; |
165 | |
166 | spin_lock_irqsave(&hidg->spinlock, flags); |
167 | } |
168 | |
169 | |
170 | count = min_t(unsigned, count, hidg->set_report_length); |
171 | tmp_buff = hidg->set_report_buff; |
172 | hidg->set_report_buff = NULL; |
173 | |
174 | spin_unlock_irqrestore(&hidg->spinlock, flags); |
175 | |
176 | if (tmp_buff != NULL) { |
177 | /* copy to user outside spinlock */ |
178 | count -= copy_to_user(buffer, tmp_buff, count); |
179 | kfree(tmp_buff); |
180 | } else |
181 | count = -ENOMEM; |
182 | |
183 | return count; |
184 | } |
185 | |
186 | static void f_hidg_req_complete(struct usb_ep *ep, struct usb_request *req) |
187 | { |
188 | struct f_hidg *hidg = (struct f_hidg *)ep->driver_data; |
189 | |
190 | if (req->status != 0) { |
191 | ERROR(hidg->func.config->cdev, |
192 | "End Point Request ERROR: %d\n", req->status); |
193 | } |
194 | |
195 | hidg->write_pending = 0; |
196 | wake_up(&hidg->write_queue); |
197 | } |
198 | |
199 | static ssize_t f_hidg_write(struct file *file, const char __user *buffer, |
200 | size_t count, loff_t *offp) |
201 | { |
202 | struct f_hidg *hidg = file->private_data; |
203 | ssize_t status = -ENOMEM; |
204 | |
205 | if (!access_ok(VERIFY_READ, buffer, count)) |
206 | return -EFAULT; |
207 | |
208 | mutex_lock(&hidg->lock); |
209 | |
210 | #define WRITE_COND (!hidg->write_pending) |
211 | |
212 | /* write queue */ |
213 | while (!WRITE_COND) { |
214 | mutex_unlock(&hidg->lock); |
215 | if (file->f_flags & O_NONBLOCK) |
216 | return -EAGAIN; |
217 | |
218 | if (wait_event_interruptible_exclusive( |
219 | hidg->write_queue, WRITE_COND)) |
220 | return -ERESTARTSYS; |
221 | |
222 | mutex_lock(&hidg->lock); |
223 | } |
224 | |
225 | count = min_t(unsigned, count, hidg->report_length); |
226 | status = copy_from_user(hidg->req->buf, buffer, count); |
227 | |
228 | if (status != 0) { |
229 | ERROR(hidg->func.config->cdev, |
230 | "copy_from_user error\n"); |
231 | mutex_unlock(&hidg->lock); |
232 | return -EINVAL; |
233 | } |
234 | |
235 | hidg->req->status = 0; |
236 | hidg->req->zero = 0; |
237 | hidg->req->length = count; |
238 | hidg->req->complete = f_hidg_req_complete; |
239 | hidg->req->context = hidg; |
240 | hidg->write_pending = 1; |
241 | |
242 | status = usb_ep_queue(hidg->in_ep, hidg->req, GFP_ATOMIC); |
243 | if (status < 0) { |
244 | ERROR(hidg->func.config->cdev, |
245 | "usb_ep_queue error on int endpoint %zd\n", status); |
246 | hidg->write_pending = 0; |
247 | wake_up(&hidg->write_queue); |
248 | } else { |
249 | status = count; |
250 | } |
251 | |
252 | mutex_unlock(&hidg->lock); |
253 | |
254 | return status; |
255 | } |
256 | |
257 | static unsigned int f_hidg_poll(struct file *file, poll_table *wait) |
258 | { |
259 | struct f_hidg *hidg = file->private_data; |
260 | unsigned int ret = 0; |
261 | |
262 | poll_wait(file, &hidg->read_queue, wait); |
263 | poll_wait(file, &hidg->write_queue, wait); |
264 | |
265 | if (WRITE_COND) |
266 | ret |= POLLOUT | POLLWRNORM; |
267 | |
268 | if (READ_COND) |
269 | ret |= POLLIN | POLLRDNORM; |
270 | |
271 | return ret; |
272 | } |
273 | |
274 | #undef WRITE_COND |
275 | #undef READ_COND |
276 | |
277 | static int f_hidg_release(struct inode *inode, struct file *fd) |
278 | { |
279 | fd->private_data = NULL; |
280 | return 0; |
281 | } |
282 | |
283 | static int f_hidg_open(struct inode *inode, struct file *fd) |
284 | { |
285 | struct f_hidg *hidg = |
286 | container_of(inode->i_cdev, struct f_hidg, cdev); |
287 | |
288 | fd->private_data = hidg; |
289 | |
290 | return 0; |
291 | } |
292 | |
293 | /*-------------------------------------------------------------------------*/ |
294 | /* usb_function */ |
295 | |
296 | static void hidg_set_report_complete(struct usb_ep *ep, struct usb_request *req) |
297 | { |
298 | struct f_hidg *hidg = (struct f_hidg *)req->context; |
299 | |
300 | if (req->status != 0 || req->buf == NULL || req->actual == 0) { |
301 | ERROR(hidg->func.config->cdev, "%s FAILED\n", __func__); |
302 | return; |
303 | } |
304 | |
305 | spin_lock(&hidg->spinlock); |
306 | |
307 | hidg->set_report_buff = krealloc(hidg->set_report_buff, |
308 | req->actual, GFP_ATOMIC); |
309 | |
310 | if (hidg->set_report_buff == NULL) { |
311 | spin_unlock(&hidg->spinlock); |
312 | return; |
313 | } |
314 | hidg->set_report_length = req->actual; |
315 | memcpy(hidg->set_report_buff, req->buf, req->actual); |
316 | |
317 | spin_unlock(&hidg->spinlock); |
318 | |
319 | wake_up(&hidg->read_queue); |
320 | } |
321 | |
322 | static int hidg_setup(struct usb_function *f, |
323 | const struct usb_ctrlrequest *ctrl) |
324 | { |
325 | struct f_hidg *hidg = func_to_hidg(f); |
326 | struct usb_composite_dev *cdev = f->config->cdev; |
327 | struct usb_request *req = cdev->req; |
328 | int status = 0; |
329 | __u16 value, length; |
330 | |
331 | value = __le16_to_cpu(ctrl->wValue); |
332 | length = __le16_to_cpu(ctrl->wLength); |
333 | |
334 | VDBG(cdev, "hid_setup crtl_request : bRequestType:0x%x bRequest:0x%x " |
335 | "Value:0x%x\n", ctrl->bRequestType, ctrl->bRequest, value); |
336 | |
337 | switch ((ctrl->bRequestType << 8) | ctrl->bRequest) { |
338 | case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8 |
339 | | HID_REQ_GET_REPORT): |
340 | VDBG(cdev, "get_report\n"); |
341 | |
342 | /* send an empty report */ |
343 | length = min_t(unsigned, length, hidg->report_length); |
344 | memset(req->buf, 0x0, length); |
345 | |
346 | goto respond; |
347 | break; |
348 | |
349 | case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8 |
350 | | HID_REQ_GET_PROTOCOL): |
351 | VDBG(cdev, "get_protocol\n"); |
352 | goto stall; |
353 | break; |
354 | |
355 | case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8 |
356 | | HID_REQ_SET_REPORT): |
357 | VDBG(cdev, "set_report | wLenght=%d\n", ctrl->wLength); |
358 | req->context = hidg; |
359 | req->complete = hidg_set_report_complete; |
360 | goto respond; |
361 | break; |
362 | |
363 | case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8 |
364 | | HID_REQ_SET_PROTOCOL): |
365 | VDBG(cdev, "set_protocol\n"); |
366 | goto stall; |
367 | break; |
368 | |
369 | case ((USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_INTERFACE) << 8 |
370 | | USB_REQ_GET_DESCRIPTOR): |
371 | switch (value >> 8) { |
372 | case HID_DT_REPORT: |
373 | VDBG(cdev, "USB_REQ_GET_DESCRIPTOR: REPORT\n"); |
374 | length = min_t(unsigned short, length, |
375 | hidg->report_desc_length); |
376 | memcpy(req->buf, hidg->report_desc, length); |
377 | goto respond; |
378 | break; |
379 | |
380 | default: |
381 | VDBG(cdev, "Unknown decriptor request 0x%x\n", |
382 | value >> 8); |
383 | goto stall; |
384 | break; |
385 | } |
386 | break; |
387 | |
388 | default: |
389 | VDBG(cdev, "Unknown request 0x%x\n", |
390 | ctrl->bRequest); |
391 | goto stall; |
392 | break; |
393 | } |
394 | |
395 | stall: |
396 | return -EOPNOTSUPP; |
397 | |
398 | respond: |
399 | req->zero = 0; |
400 | req->length = length; |
401 | status = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); |
402 | if (status < 0) |
403 | ERROR(cdev, "usb_ep_queue error on ep0 %d\n", value); |
404 | return status; |
405 | } |
406 | |
407 | static void hidg_disable(struct usb_function *f) |
408 | { |
409 | struct f_hidg *hidg = func_to_hidg(f); |
410 | |
411 | usb_ep_disable(hidg->in_ep); |
412 | hidg->in_ep->driver_data = NULL; |
413 | } |
414 | |
415 | static int hidg_set_alt(struct usb_function *f, unsigned intf, unsigned alt) |
416 | { |
417 | struct usb_composite_dev *cdev = f->config->cdev; |
418 | struct f_hidg *hidg = func_to_hidg(f); |
419 | const struct usb_endpoint_descriptor *ep_desc; |
420 | int status = 0; |
421 | |
422 | VDBG(cdev, "hidg_set_alt intf:%d alt:%d\n", intf, alt); |
423 | |
424 | if (hidg->in_ep != NULL) { |
425 | /* restart endpoint */ |
426 | if (hidg->in_ep->driver_data != NULL) |
427 | usb_ep_disable(hidg->in_ep); |
428 | |
429 | ep_desc = ep_choose(f->config->cdev->gadget, |
430 | hidg->hs_in_ep_desc, hidg->fs_in_ep_desc); |
431 | status = usb_ep_enable(hidg->in_ep, ep_desc); |
432 | if (status < 0) { |
433 | ERROR(cdev, "Enable endpoint FAILED!\n"); |
434 | goto fail; |
435 | } |
436 | hidg->in_ep->driver_data = hidg; |
437 | } |
438 | fail: |
439 | return status; |
440 | } |
441 | |
442 | const struct file_operations f_hidg_fops = { |
443 | .owner = THIS_MODULE, |
444 | .open = f_hidg_open, |
445 | .release = f_hidg_release, |
446 | .write = f_hidg_write, |
447 | .read = f_hidg_read, |
448 | .poll = f_hidg_poll, |
449 | .llseek = noop_llseek, |
450 | }; |
451 | |
452 | static int __init hidg_bind(struct usb_configuration *c, struct usb_function *f) |
453 | { |
454 | struct usb_ep *ep; |
455 | struct f_hidg *hidg = func_to_hidg(f); |
456 | int status; |
457 | dev_t dev; |
458 | |
459 | /* allocate instance-specific interface IDs, and patch descriptors */ |
460 | status = usb_interface_id(c, f); |
461 | if (status < 0) |
462 | goto fail; |
463 | hidg_interface_desc.bInterfaceNumber = status; |
464 | |
465 | |
466 | /* allocate instance-specific endpoints */ |
467 | status = -ENODEV; |
468 | ep = usb_ep_autoconfig(c->cdev->gadget, &hidg_fs_in_ep_desc); |
469 | if (!ep) |
470 | goto fail; |
471 | ep->driver_data = c->cdev; /* claim */ |
472 | hidg->in_ep = ep; |
473 | |
474 | /* preallocate request and buffer */ |
475 | status = -ENOMEM; |
476 | hidg->req = usb_ep_alloc_request(hidg->in_ep, GFP_KERNEL); |
477 | if (!hidg->req) |
478 | goto fail; |
479 | |
480 | |
481 | hidg->req->buf = kmalloc(hidg->report_length, GFP_KERNEL); |
482 | if (!hidg->req->buf) |
483 | goto fail; |
484 | |
485 | /* set descriptor dynamic values */ |
486 | hidg_interface_desc.bInterfaceSubClass = hidg->bInterfaceSubClass; |
487 | hidg_interface_desc.bInterfaceProtocol = hidg->bInterfaceProtocol; |
488 | hidg_hs_in_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length); |
489 | hidg_fs_in_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length); |
490 | hidg_desc.desc[0].bDescriptorType = HID_DT_REPORT; |
491 | hidg_desc.desc[0].wDescriptorLength = |
492 | cpu_to_le16(hidg->report_desc_length); |
493 | |
494 | hidg->set_report_buff = NULL; |
495 | |
496 | /* copy descriptors */ |
497 | f->descriptors = usb_copy_descriptors(hidg_fs_descriptors); |
498 | if (!f->descriptors) |
499 | goto fail; |
500 | |
501 | hidg->fs_in_ep_desc = usb_find_endpoint(hidg_fs_descriptors, |
502 | f->descriptors, |
503 | &hidg_fs_in_ep_desc); |
504 | |
505 | if (gadget_is_dualspeed(c->cdev->gadget)) { |
506 | hidg_hs_in_ep_desc.bEndpointAddress = |
507 | hidg_fs_in_ep_desc.bEndpointAddress; |
508 | f->hs_descriptors = usb_copy_descriptors(hidg_hs_descriptors); |
509 | if (!f->hs_descriptors) |
510 | goto fail; |
511 | hidg->hs_in_ep_desc = usb_find_endpoint(hidg_hs_descriptors, |
512 | f->hs_descriptors, |
513 | &hidg_hs_in_ep_desc); |
514 | } else { |
515 | hidg->hs_in_ep_desc = NULL; |
516 | } |
517 | |
518 | mutex_init(&hidg->lock); |
519 | spin_lock_init(&hidg->spinlock); |
520 | init_waitqueue_head(&hidg->write_queue); |
521 | init_waitqueue_head(&hidg->read_queue); |
522 | |
523 | /* create char device */ |
524 | cdev_init(&hidg->cdev, &f_hidg_fops); |
525 | dev = MKDEV(major, hidg->minor); |
526 | status = cdev_add(&hidg->cdev, dev, 1); |
527 | if (status) |
528 | goto fail; |
529 | |
530 | device_create(hidg_class, NULL, dev, NULL, "%s%d", "hidg", hidg->minor); |
531 | |
532 | return 0; |
533 | |
534 | fail: |
535 | ERROR(f->config->cdev, "hidg_bind FAILED\n"); |
536 | if (hidg->req != NULL) { |
537 | kfree(hidg->req->buf); |
538 | if (hidg->in_ep != NULL) |
539 | usb_ep_free_request(hidg->in_ep, hidg->req); |
540 | } |
541 | |
542 | usb_free_descriptors(f->hs_descriptors); |
543 | usb_free_descriptors(f->descriptors); |
544 | |
545 | return status; |
546 | } |
547 | |
548 | static void hidg_unbind(struct usb_configuration *c, struct usb_function *f) |
549 | { |
550 | struct f_hidg *hidg = func_to_hidg(f); |
551 | |
552 | device_destroy(hidg_class, MKDEV(major, hidg->minor)); |
553 | cdev_del(&hidg->cdev); |
554 | |
555 | /* disable/free request and end point */ |
556 | usb_ep_disable(hidg->in_ep); |
557 | usb_ep_dequeue(hidg->in_ep, hidg->req); |
558 | kfree(hidg->req->buf); |
559 | usb_ep_free_request(hidg->in_ep, hidg->req); |
560 | |
561 | /* free descriptors copies */ |
562 | usb_free_descriptors(f->hs_descriptors); |
563 | usb_free_descriptors(f->descriptors); |
564 | |
565 | kfree(hidg->report_desc); |
566 | kfree(hidg->set_report_buff); |
567 | kfree(hidg); |
568 | } |
569 | |
570 | /*-------------------------------------------------------------------------*/ |
571 | /* Strings */ |
572 | |
573 | #define CT_FUNC_HID_IDX 0 |
574 | |
575 | static struct usb_string ct_func_string_defs[] = { |
576 | [CT_FUNC_HID_IDX].s = "HID Interface", |
577 | {}, /* end of list */ |
578 | }; |
579 | |
580 | static struct usb_gadget_strings ct_func_string_table = { |
581 | .language = 0x0409, /* en-US */ |
582 | .strings = ct_func_string_defs, |
583 | }; |
584 | |
585 | static struct usb_gadget_strings *ct_func_strings[] = { |
586 | &ct_func_string_table, |
587 | NULL, |
588 | }; |
589 | |
590 | /*-------------------------------------------------------------------------*/ |
591 | /* usb_configuration */ |
592 | |
593 | int __init hidg_bind_config(struct usb_configuration *c, |
594 | struct hidg_func_descriptor *fdesc, int index) |
595 | { |
596 | struct f_hidg *hidg; |
597 | int status; |
598 | |
599 | if (index >= minors) |
600 | return -ENOENT; |
601 | |
602 | /* maybe allocate device-global string IDs, and patch descriptors */ |
603 | if (ct_func_string_defs[CT_FUNC_HID_IDX].id == 0) { |
604 | status = usb_string_id(c->cdev); |
605 | if (status < 0) |
606 | return status; |
607 | ct_func_string_defs[CT_FUNC_HID_IDX].id = status; |
608 | hidg_interface_desc.iInterface = status; |
609 | } |
610 | |
611 | /* allocate and initialize one new instance */ |
612 | hidg = kzalloc(sizeof *hidg, GFP_KERNEL); |
613 | if (!hidg) |
614 | return -ENOMEM; |
615 | |
616 | hidg->minor = index; |
617 | hidg->bInterfaceSubClass = fdesc->subclass; |
618 | hidg->bInterfaceProtocol = fdesc->protocol; |
619 | hidg->report_length = fdesc->report_length; |
620 | hidg->report_desc_length = fdesc->report_desc_length; |
621 | hidg->report_desc = kmemdup(fdesc->report_desc, |
622 | fdesc->report_desc_length, |
623 | GFP_KERNEL); |
624 | if (!hidg->report_desc) { |
625 | kfree(hidg); |
626 | return -ENOMEM; |
627 | } |
628 | |
629 | hidg->func.name = "hid"; |
630 | hidg->func.strings = ct_func_strings; |
631 | hidg->func.bind = hidg_bind; |
632 | hidg->func.unbind = hidg_unbind; |
633 | hidg->func.set_alt = hidg_set_alt; |
634 | hidg->func.disable = hidg_disable; |
635 | hidg->func.setup = hidg_setup; |
636 | |
637 | status = usb_add_function(c, &hidg->func); |
638 | if (status) |
639 | kfree(hidg); |
640 | |
641 | return status; |
642 | } |
643 | |
644 | int __init ghid_setup(struct usb_gadget *g, int count) |
645 | { |
646 | int status; |
647 | dev_t dev; |
648 | |
649 | hidg_class = class_create(THIS_MODULE, "hidg"); |
650 | |
651 | status = alloc_chrdev_region(&dev, 0, count, "hidg"); |
652 | if (!status) { |
653 | major = MAJOR(dev); |
654 | minors = count; |
655 | } |
656 | |
657 | return status; |
658 | } |
659 | |
660 | void ghid_cleanup(void) |
661 | { |
662 | if (major) { |
663 | unregister_chrdev_region(MKDEV(major, 0), minors); |
664 | major = minors = 0; |
665 | } |
666 | |
667 | class_destroy(hidg_class); |
668 | hidg_class = NULL; |
669 | } |
670 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
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master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9