Commit | Line | Data |
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63eb9546 JFM |
1 | /* |
2 | * Main USB camera driver | |
3 | * | |
4 | * V4L2 by Jean-Francois Moine <http://moinejf.free.fr> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2 of the License, or (at your | |
9 | * option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
13 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | * 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 Foundation, | |
18 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | */ | |
20 | ||
21 | #define MODULE_NAME "gspca" | |
22 | ||
23 | #include <linux/init.h> | |
cf0fe08d | 24 | #include <linux/version.h> |
63eb9546 JFM |
25 | #include <linux/fs.h> |
26 | #include <linux/vmalloc.h> | |
27 | #include <linux/sched.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/mm.h> | |
30 | #include <linux/string.h> | |
31 | #include <linux/pagemap.h> | |
956e42d2 | 32 | #include <linux/io.h> |
63eb9546 | 33 | #include <asm/page.h> |
956e42d2 | 34 | #include <linux/uaccess.h> |
63eb9546 | 35 | #include <linux/jiffies.h> |
35ea11ff | 36 | #include <media/v4l2-ioctl.h> |
63eb9546 JFM |
37 | |
38 | #include "gspca.h" | |
39 | ||
d43fa32f | 40 | /* global values */ |
8fee8453 JFM |
41 | #define DEF_NURBS 3 /* default number of URBs */ |
42 | #if DEF_NURBS > MAX_NURBS | |
43 | #error "DEF_NURBS too big" | |
44 | #endif | |
d43fa32f | 45 | |
63eb9546 JFM |
46 | MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>"); |
47 | MODULE_DESCRIPTION("GSPCA USB Camera Driver"); | |
48 | MODULE_LICENSE("GPL"); | |
49 | ||
afd46291 | 50 | #define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 5, 0) |
63eb9546 | 51 | |
335b3f88 | 52 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
53 | int gspca_debug = D_ERR | D_PROBE; |
54 | EXPORT_SYMBOL(gspca_debug); | |
55 | ||
56 | static void PDEBUG_MODE(char *txt, __u32 pixfmt, int w, int h) | |
57 | { | |
58 | if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') { | |
59 | PDEBUG(D_CONF|D_STREAM, "%s %c%c%c%c %dx%d", | |
60 | txt, | |
61 | pixfmt & 0xff, | |
62 | (pixfmt >> 8) & 0xff, | |
63 | (pixfmt >> 16) & 0xff, | |
64 | pixfmt >> 24, | |
65 | w, h); | |
66 | } else { | |
67 | PDEBUG(D_CONF|D_STREAM, "%s 0x%08x %dx%d", | |
68 | txt, | |
69 | pixfmt, | |
70 | w, h); | |
71 | } | |
72 | } | |
73 | #else | |
74 | #define PDEBUG_MODE(txt, pixfmt, w, h) | |
75 | #endif | |
76 | ||
d43fa32f JFM |
77 | /* specific memory types - !! should different from V4L2_MEMORY_xxx */ |
78 | #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */ | |
79 | #define GSPCA_MEMORY_READ 7 | |
80 | ||
d43fa32f | 81 | #define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE) |
d43fa32f | 82 | |
63eb9546 JFM |
83 | /* |
84 | * VMA operations. | |
85 | */ | |
86 | static void gspca_vm_open(struct vm_area_struct *vma) | |
87 | { | |
88 | struct gspca_frame *frame = vma->vm_private_data; | |
89 | ||
90 | frame->vma_use_count++; | |
91 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED; | |
92 | } | |
93 | ||
94 | static void gspca_vm_close(struct vm_area_struct *vma) | |
95 | { | |
96 | struct gspca_frame *frame = vma->vm_private_data; | |
97 | ||
98 | if (--frame->vma_use_count <= 0) | |
99 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED; | |
100 | } | |
101 | ||
102 | static struct vm_operations_struct gspca_vm_ops = { | |
103 | .open = gspca_vm_open, | |
104 | .close = gspca_vm_close, | |
105 | }; | |
106 | ||
1b60e1ad JFM |
107 | /* get the current input frame buffer */ |
108 | struct gspca_frame *gspca_get_i_frame(struct gspca_dev *gspca_dev) | |
109 | { | |
110 | struct gspca_frame *frame; | |
111 | int i; | |
112 | ||
113 | i = gspca_dev->fr_i; | |
114 | i = gspca_dev->fr_queue[i]; | |
115 | frame = &gspca_dev->frame[i]; | |
116 | if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS) | |
117 | != V4L2_BUF_FLAG_QUEUED) | |
118 | return NULL; | |
119 | return frame; | |
120 | } | |
121 | EXPORT_SYMBOL(gspca_get_i_frame); | |
122 | ||
63eb9546 | 123 | /* |
d43fa32f | 124 | * fill a video frame from an URB and resubmit |
63eb9546 | 125 | */ |
d43fa32f JFM |
126 | static void fill_frame(struct gspca_dev *gspca_dev, |
127 | struct urb *urb) | |
63eb9546 | 128 | { |
63eb9546 | 129 | struct gspca_frame *frame; |
8d584a53 | 130 | u8 *data; /* address of data in the iso message */ |
1b60e1ad | 131 | int i, len, st; |
63eb9546 JFM |
132 | cam_pkt_op pkt_scan; |
133 | ||
6a7eba24 | 134 | if (urb->status != 0) { |
090264e5 JFM |
135 | if (urb->status == -ESHUTDOWN) |
136 | return; /* disconnection */ | |
62ee8eee | 137 | #ifdef CONFIG_PM |
6a709749 | 138 | if (!gspca_dev->frozen) |
62ee8eee | 139 | #endif |
6a709749 | 140 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); |
090264e5 | 141 | return; |
6a7eba24 | 142 | } |
63eb9546 JFM |
143 | pkt_scan = gspca_dev->sd_desc->pkt_scan; |
144 | for (i = 0; i < urb->number_of_packets; i++) { | |
145 | ||
146 | /* check the availability of the frame buffer */ | |
1b60e1ad JFM |
147 | frame = gspca_get_i_frame(gspca_dev); |
148 | if (!frame) { | |
63eb9546 JFM |
149 | gspca_dev->last_packet_type = DISCARD_PACKET; |
150 | break; | |
151 | } | |
152 | ||
153 | /* check the packet status and length */ | |
154 | len = urb->iso_frame_desc[i].actual_length; | |
ff374747 JFM |
155 | if (len == 0) { |
156 | if (gspca_dev->empty_packet == 0) | |
157 | gspca_dev->empty_packet = 1; | |
6a7eba24 | 158 | continue; |
ff374747 | 159 | } |
63eb9546 JFM |
160 | st = urb->iso_frame_desc[i].status; |
161 | if (st) { | |
6a7eba24 JFM |
162 | PDEBUG(D_ERR, |
163 | "ISOC data error: [%d] len=%d, status=%d", | |
63eb9546 JFM |
164 | i, len, st); |
165 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
166 | continue; | |
167 | } | |
63eb9546 JFM |
168 | |
169 | /* let the packet be analyzed by the subdriver */ | |
170 | PDEBUG(D_PACK, "packet [%d] o:%d l:%d", | |
171 | i, urb->iso_frame_desc[i].offset, len); | |
8d584a53 | 172 | data = (u8 *) urb->transfer_buffer |
63eb9546 JFM |
173 | + urb->iso_frame_desc[i].offset; |
174 | pkt_scan(gspca_dev, frame, data, len); | |
175 | } | |
176 | ||
177 | /* resubmit the URB */ | |
63eb9546 JFM |
178 | st = usb_submit_urb(urb, GFP_ATOMIC); |
179 | if (st < 0) | |
180 | PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st); | |
181 | } | |
182 | ||
d43fa32f JFM |
183 | /* |
184 | * ISOC message interrupt from the USB device | |
185 | * | |
ac0d6df6 | 186 | * Analyse each packet and call the subdriver for copy to the frame buffer. |
d43fa32f | 187 | */ |
8d584a53 | 188 | static void isoc_irq(struct urb *urb) |
d43fa32f JFM |
189 | { |
190 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
191 | ||
3647fea8 | 192 | PDEBUG(D_PACK, "isoc irq"); |
d43fa32f JFM |
193 | if (!gspca_dev->streaming) |
194 | return; | |
195 | fill_frame(gspca_dev, urb); | |
196 | } | |
197 | ||
0be01004 JFM |
198 | /* |
199 | * bulk message interrupt from the USB device | |
200 | */ | |
8d584a53 | 201 | static void bulk_irq(struct urb *urb) |
0be01004 JFM |
202 | { |
203 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
204 | struct gspca_frame *frame; | |
dff369aa | 205 | int st; |
0be01004 JFM |
206 | |
207 | PDEBUG(D_PACK, "bulk irq"); | |
208 | if (!gspca_dev->streaming) | |
209 | return; | |
880ae24d JFM |
210 | switch (urb->status) { |
211 | case 0: | |
212 | break; | |
090264e5 JFM |
213 | case -ESHUTDOWN: |
214 | return; /* disconnection */ | |
880ae24d JFM |
215 | case -ECONNRESET: |
216 | urb->status = 0; | |
217 | break; | |
218 | default: | |
0be01004 JFM |
219 | #ifdef CONFIG_PM |
220 | if (!gspca_dev->frozen) | |
221 | #endif | |
222 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); | |
090264e5 | 223 | return; |
0be01004 JFM |
224 | } |
225 | ||
226 | /* check the availability of the frame buffer */ | |
1b60e1ad JFM |
227 | frame = gspca_get_i_frame(gspca_dev); |
228 | if (!frame) { | |
0be01004 JFM |
229 | gspca_dev->last_packet_type = DISCARD_PACKET; |
230 | } else { | |
231 | PDEBUG(D_PACK, "packet l:%d", urb->actual_length); | |
232 | gspca_dev->sd_desc->pkt_scan(gspca_dev, | |
233 | frame, | |
234 | urb->transfer_buffer, | |
235 | urb->actual_length); | |
236 | } | |
dff369aa AO |
237 | |
238 | /* resubmit the URB */ | |
239 | if (gspca_dev->cam.bulk_nurbs != 0) { | |
240 | st = usb_submit_urb(urb, GFP_ATOMIC); | |
241 | if (st < 0) | |
242 | PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st); | |
243 | } | |
0be01004 JFM |
244 | } |
245 | ||
63eb9546 JFM |
246 | /* |
247 | * add data to the current frame | |
248 | * | |
ac0d6df6 JFM |
249 | * This function is called by the subdrivers at interrupt level. |
250 | * | |
63eb9546 JFM |
251 | * To build a frame, these ones must add |
252 | * - one FIRST_PACKET | |
253 | * - 0 or many INTER_PACKETs | |
254 | * - one LAST_PACKET | |
255 | * DISCARD_PACKET invalidates the whole frame. | |
256 | * On LAST_PACKET, a new frame is returned. | |
257 | */ | |
258 | struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev, | |
e293e599 | 259 | enum gspca_packet_type packet_type, |
63eb9546 | 260 | struct gspca_frame *frame, |
a5ae2062 | 261 | const __u8 *data, |
63eb9546 JFM |
262 | int len) |
263 | { | |
264 | int i, j; | |
265 | ||
e2997a72 | 266 | PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len); |
63eb9546 JFM |
267 | |
268 | /* when start of a new frame, if the current frame buffer | |
269 | * is not queued, discard the whole frame */ | |
270 | if (packet_type == FIRST_PACKET) { | |
d43fa32f JFM |
271 | if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS) |
272 | != V4L2_BUF_FLAG_QUEUED) { | |
63eb9546 JFM |
273 | gspca_dev->last_packet_type = DISCARD_PACKET; |
274 | return frame; | |
275 | } | |
276 | frame->data_end = frame->data; | |
277 | jiffies_to_timeval(get_jiffies_64(), | |
278 | &frame->v4l2_buf.timestamp); | |
279 | frame->v4l2_buf.sequence = ++gspca_dev->sequence; | |
d43fa32f | 280 | } else if (gspca_dev->last_packet_type == DISCARD_PACKET) { |
06ca78fa JFM |
281 | if (packet_type == LAST_PACKET) |
282 | gspca_dev->last_packet_type = packet_type; | |
63eb9546 | 283 | return frame; |
d43fa32f | 284 | } |
63eb9546 | 285 | |
d43fa32f | 286 | /* append the packet to the frame buffer */ |
63eb9546 JFM |
287 | if (len > 0) { |
288 | if (frame->data_end - frame->data + len | |
289 | > frame->v4l2_buf.length) { | |
a9e11134 | 290 | PDEBUG(D_ERR|D_PACK, "frame overflow %zd > %d", |
63eb9546 JFM |
291 | frame->data_end - frame->data + len, |
292 | frame->v4l2_buf.length); | |
293 | packet_type = DISCARD_PACKET; | |
294 | } else { | |
ac0d6df6 | 295 | memcpy(frame->data_end, data, len); |
63eb9546 JFM |
296 | frame->data_end += len; |
297 | } | |
298 | } | |
299 | gspca_dev->last_packet_type = packet_type; | |
300 | ||
219423c1 | 301 | /* if last packet, wake up the application and advance in the queue */ |
63eb9546 JFM |
302 | if (packet_type == LAST_PACKET) { |
303 | frame->v4l2_buf.bytesused = frame->data_end - frame->data; | |
304 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_QUEUED; | |
305 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_DONE; | |
63eb9546 | 306 | wake_up_interruptible(&gspca_dev->wq); /* event = new frame */ |
d43fa32f JFM |
307 | i = (gspca_dev->fr_i + 1) % gspca_dev->nframes; |
308 | gspca_dev->fr_i = i; | |
63eb9546 JFM |
309 | PDEBUG(D_FRAM, "frame complete len:%d q:%d i:%d o:%d", |
310 | frame->v4l2_buf.bytesused, | |
311 | gspca_dev->fr_q, | |
312 | i, | |
313 | gspca_dev->fr_o); | |
314 | j = gspca_dev->fr_queue[i]; | |
315 | frame = &gspca_dev->frame[j]; | |
63eb9546 JFM |
316 | } |
317 | return frame; | |
318 | } | |
319 | EXPORT_SYMBOL(gspca_frame_add); | |
320 | ||
321 | static int gspca_is_compressed(__u32 format) | |
322 | { | |
323 | switch (format) { | |
324 | case V4L2_PIX_FMT_MJPEG: | |
325 | case V4L2_PIX_FMT_JPEG: | |
50a871fe | 326 | case V4L2_PIX_FMT_SPCA561: |
ab8f12cf | 327 | case V4L2_PIX_FMT_PAC207: |
d661e622 | 328 | case V4L2_PIX_FMT_MR97310A: |
63eb9546 JFM |
329 | return 1; |
330 | } | |
331 | return 0; | |
332 | } | |
333 | ||
334 | static void *rvmalloc(unsigned long size) | |
335 | { | |
336 | void *mem; | |
337 | unsigned long adr; | |
338 | ||
63eb9546 | 339 | mem = vmalloc_32(size); |
efab8211 | 340 | if (mem != NULL) { |
63eb9546 JFM |
341 | adr = (unsigned long) mem; |
342 | while ((long) size > 0) { | |
343 | SetPageReserved(vmalloc_to_page((void *) adr)); | |
344 | adr += PAGE_SIZE; | |
345 | size -= PAGE_SIZE; | |
346 | } | |
347 | } | |
348 | return mem; | |
349 | } | |
350 | ||
ac0d6df6 | 351 | static void rvfree(void *mem, long size) |
63eb9546 JFM |
352 | { |
353 | unsigned long adr; | |
354 | ||
63eb9546 | 355 | adr = (unsigned long) mem; |
ac0d6df6 | 356 | while (size > 0) { |
63eb9546 JFM |
357 | ClearPageReserved(vmalloc_to_page((void *) adr)); |
358 | adr += PAGE_SIZE; | |
359 | size -= PAGE_SIZE; | |
360 | } | |
361 | vfree(mem); | |
362 | } | |
363 | ||
364 | static int frame_alloc(struct gspca_dev *gspca_dev, | |
d43fa32f | 365 | unsigned int count) |
63eb9546 | 366 | { |
d43fa32f JFM |
367 | struct gspca_frame *frame; |
368 | unsigned int frsz; | |
369 | int i; | |
63eb9546 | 370 | |
c2446b3e JFM |
371 | i = gspca_dev->curr_mode; |
372 | frsz = gspca_dev->cam.cam_mode[i].sizeimage; | |
63eb9546 | 373 | PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz); |
63eb9546 | 374 | frsz = PAGE_ALIGN(frsz); |
63eb9546 | 375 | gspca_dev->frsz = frsz; |
c2446b3e JFM |
376 | if (count > GSPCA_MAX_FRAMES) |
377 | count = GSPCA_MAX_FRAMES; | |
ac0d6df6 JFM |
378 | gspca_dev->frbuf = rvmalloc(frsz * count); |
379 | if (!gspca_dev->frbuf) { | |
380 | err("frame alloc failed"); | |
381 | return -ENOMEM; | |
63eb9546 JFM |
382 | } |
383 | gspca_dev->nframes = count; | |
384 | for (i = 0; i < count; i++) { | |
d43fa32f JFM |
385 | frame = &gspca_dev->frame[i]; |
386 | frame->v4l2_buf.index = i; | |
387 | frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
388 | frame->v4l2_buf.flags = 0; | |
389 | frame->v4l2_buf.field = V4L2_FIELD_NONE; | |
390 | frame->v4l2_buf.length = frsz; | |
391 | frame->v4l2_buf.memory = gspca_dev->memory; | |
392 | frame->v4l2_buf.sequence = 0; | |
ac0d6df6 | 393 | frame->data = frame->data_end = |
d43fa32f | 394 | gspca_dev->frbuf + i * frsz; |
ac0d6df6 | 395 | frame->v4l2_buf.m.offset = i * frsz; |
63eb9546 JFM |
396 | } |
397 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
398 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
399 | gspca_dev->sequence = 0; | |
d43fa32f | 400 | return 0; |
63eb9546 JFM |
401 | } |
402 | ||
403 | static void frame_free(struct gspca_dev *gspca_dev) | |
404 | { | |
405 | int i; | |
406 | ||
407 | PDEBUG(D_STREAM, "frame free"); | |
efab8211 | 408 | if (gspca_dev->frbuf != NULL) { |
63eb9546 JFM |
409 | rvfree(gspca_dev->frbuf, |
410 | gspca_dev->nframes * gspca_dev->frsz); | |
411 | gspca_dev->frbuf = NULL; | |
412 | for (i = 0; i < gspca_dev->nframes; i++) | |
413 | gspca_dev->frame[i].data = NULL; | |
414 | } | |
415 | gspca_dev->nframes = 0; | |
416 | } | |
417 | ||
d43fa32f | 418 | static void destroy_urbs(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
419 | { |
420 | struct urb *urb; | |
421 | unsigned int i; | |
422 | ||
423 | PDEBUG(D_STREAM, "kill transfer"); | |
44732819 | 424 | for (i = 0; i < MAX_NURBS; i++) { |
4aa0d037 | 425 | urb = gspca_dev->urb[i]; |
63eb9546 | 426 | if (urb == NULL) |
d43fa32f | 427 | break; |
63eb9546 | 428 | |
4aa0d037 | 429 | gspca_dev->urb[i] = NULL; |
090264e5 | 430 | usb_kill_urb(urb); |
efab8211 | 431 | if (urb->transfer_buffer != NULL) |
63eb9546 JFM |
432 | usb_buffer_free(gspca_dev->dev, |
433 | urb->transfer_buffer_length, | |
4aa0d037 | 434 | urb->transfer_buffer, |
63eb9546 | 435 | urb->transfer_dma); |
63eb9546 JFM |
436 | usb_free_urb(urb); |
437 | } | |
63eb9546 JFM |
438 | } |
439 | ||
440 | /* | |
219423c1 | 441 | * look for an input transfer endpoint in an alternate setting |
63eb9546 | 442 | */ |
0be01004 | 443 | static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, |
0be01004 | 444 | __u8 xfer) |
63eb9546 JFM |
445 | { |
446 | struct usb_host_endpoint *ep; | |
447 | int i, attr; | |
448 | ||
63eb9546 JFM |
449 | for (i = 0; i < alt->desc.bNumEndpoints; i++) { |
450 | ep = &alt->endpoint[i]; | |
50e06dee JFM |
451 | attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; |
452 | if (attr == xfer) | |
453 | return ep; | |
63eb9546 JFM |
454 | } |
455 | return NULL; | |
456 | } | |
457 | ||
458 | /* | |
219423c1 | 459 | * look for an input (isoc or bulk) endpoint |
63eb9546 JFM |
460 | * |
461 | * The endpoint is defined by the subdriver. | |
462 | * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep). | |
463 | * This routine may be called many times when the bandwidth is too small | |
464 | * (the bandwidth is checked on urb submit). | |
465 | */ | |
0be01004 | 466 | static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
467 | { |
468 | struct usb_interface *intf; | |
469 | struct usb_host_endpoint *ep; | |
470 | int i, ret; | |
471 | ||
472 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
6a7eba24 | 473 | ep = NULL; |
63eb9546 | 474 | i = gspca_dev->alt; /* previous alt setting */ |
95d9142c JFM |
475 | |
476 | /* try isoc */ | |
0dc641dc | 477 | while (--i >= 0) { |
0be01004 | 478 | ep = alt_xfer(&intf->altsetting[i], |
95d9142c | 479 | USB_ENDPOINT_XFER_ISOC); |
63eb9546 JFM |
480 | if (ep) |
481 | break; | |
482 | } | |
95d9142c | 483 | |
0dc641dc | 484 | /* if no isoc, try bulk (alt 0 only) */ |
6a7eba24 | 485 | if (ep == NULL) { |
95d9142c | 486 | ep = alt_xfer(&intf->altsetting[0], |
95d9142c JFM |
487 | USB_ENDPOINT_XFER_BULK); |
488 | if (ep == NULL) { | |
489 | err("no transfer endpoint found"); | |
490 | return NULL; | |
491 | } | |
0dc641dc JFM |
492 | i = 0; |
493 | gspca_dev->bulk = 1; | |
63eb9546 | 494 | } |
0be01004 | 495 | PDEBUG(D_STREAM, "use alt %d ep 0x%02x", |
63eb9546 | 496 | i, ep->desc.bEndpointAddress); |
95d9142c JFM |
497 | if (i > 0) { |
498 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i); | |
499 | if (ret < 0) { | |
500 | err("set interface err %d", ret); | |
501 | return NULL; | |
502 | } | |
63eb9546 | 503 | } |
d43fa32f | 504 | gspca_dev->alt = i; /* memorize the current alt setting */ |
63eb9546 JFM |
505 | return ep; |
506 | } | |
507 | ||
508 | /* | |
0be01004 | 509 | * create the URBs for image transfer |
63eb9546 JFM |
510 | */ |
511 | static int create_urbs(struct gspca_dev *gspca_dev, | |
512 | struct usb_host_endpoint *ep) | |
513 | { | |
514 | struct urb *urb; | |
d43fa32f | 515 | int n, nurbs, i, psize, npkt, bsize; |
63eb9546 JFM |
516 | |
517 | /* calculate the packet size and the number of packets */ | |
63eb9546 | 518 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
d43fa32f | 519 | |
0dc641dc | 520 | if (!gspca_dev->bulk) { /* isoc */ |
95d9142c JFM |
521 | |
522 | /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ | |
523 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); | |
0be01004 JFM |
524 | npkt = ISO_MAX_SIZE / psize; |
525 | if (npkt > ISO_MAX_PKT) | |
526 | npkt = ISO_MAX_PKT; | |
527 | bsize = psize * npkt; | |
528 | PDEBUG(D_STREAM, | |
529 | "isoc %d pkts size %d = bsize:%d", | |
530 | npkt, psize, bsize); | |
51977a8d | 531 | nurbs = DEF_NURBS; |
95d9142c | 532 | } else { /* bulk */ |
0be01004 | 533 | npkt = 0; |
dff369aa | 534 | bsize = gspca_dev->cam.bulk_size; |
95d9142c JFM |
535 | if (bsize == 0) |
536 | bsize = psize; | |
0be01004 | 537 | PDEBUG(D_STREAM, "bulk bsize:%d", bsize); |
dff369aa AO |
538 | if (gspca_dev->cam.bulk_nurbs != 0) |
539 | nurbs = gspca_dev->cam.bulk_nurbs; | |
540 | else | |
541 | nurbs = 1; | |
0be01004 JFM |
542 | } |
543 | ||
6a7eba24 | 544 | gspca_dev->nurbs = nurbs; |
d43fa32f | 545 | for (n = 0; n < nurbs; n++) { |
63eb9546 JFM |
546 | urb = usb_alloc_urb(npkt, GFP_KERNEL); |
547 | if (!urb) { | |
548 | err("usb_alloc_urb failed"); | |
0d0548e6 | 549 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
550 | return -ENOMEM; |
551 | } | |
4aa0d037 | 552 | urb->transfer_buffer = usb_buffer_alloc(gspca_dev->dev, |
63eb9546 JFM |
553 | bsize, |
554 | GFP_KERNEL, | |
555 | &urb->transfer_dma); | |
556 | ||
4aa0d037 | 557 | if (urb->transfer_buffer == NULL) { |
63eb9546 | 558 | usb_free_urb(urb); |
63eb9546 | 559 | err("usb_buffer_urb failed"); |
0d0548e6 | 560 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
561 | return -ENOMEM; |
562 | } | |
4aa0d037 | 563 | gspca_dev->urb[n] = urb; |
63eb9546 JFM |
564 | urb->dev = gspca_dev->dev; |
565 | urb->context = gspca_dev; | |
63eb9546 | 566 | urb->transfer_buffer_length = bsize; |
0be01004 JFM |
567 | if (npkt != 0) { /* ISOC */ |
568 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, | |
569 | ep->desc.bEndpointAddress); | |
6c49da7f FZ |
570 | urb->transfer_flags = URB_ISO_ASAP |
571 | | URB_NO_TRANSFER_DMA_MAP; | |
0be01004 JFM |
572 | urb->interval = ep->desc.bInterval; |
573 | urb->complete = isoc_irq; | |
574 | urb->number_of_packets = npkt; | |
575 | for (i = 0; i < npkt; i++) { | |
576 | urb->iso_frame_desc[i].length = psize; | |
577 | urb->iso_frame_desc[i].offset = psize * i; | |
578 | } | |
579 | } else { /* bulk */ | |
580 | urb->pipe = usb_rcvbulkpipe(gspca_dev->dev, | |
581 | ep->desc.bEndpointAddress), | |
6c49da7f | 582 | urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; |
0be01004 | 583 | urb->complete = bulk_irq; |
63eb9546 JFM |
584 | } |
585 | } | |
586 | return 0; | |
587 | } | |
588 | ||
589 | /* | |
590 | * start the USB transfer | |
591 | */ | |
592 | static int gspca_init_transfer(struct gspca_dev *gspca_dev) | |
593 | { | |
63eb9546 JFM |
594 | struct usb_host_endpoint *ep; |
595 | int n, ret; | |
596 | ||
e2997a72 HG |
597 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
598 | return -ERESTARTSYS; | |
63eb9546 | 599 | |
090264e5 JFM |
600 | if (!gspca_dev->present) { |
601 | ret = -ENODEV; | |
602 | goto out; | |
603 | } | |
604 | ||
d43fa32f JFM |
605 | /* set the higher alternate setting and |
606 | * loop until urb submit succeeds */ | |
607 | gspca_dev->alt = gspca_dev->nbalt; | |
63eb9546 | 608 | for (;;) { |
d43fa32f | 609 | PDEBUG(D_STREAM, "init transfer alt %d", gspca_dev->alt); |
0be01004 | 610 | ep = get_ep(gspca_dev); |
63eb9546 JFM |
611 | if (ep == NULL) { |
612 | ret = -EIO; | |
613 | goto out; | |
614 | } | |
615 | ret = create_urbs(gspca_dev, ep); | |
616 | if (ret < 0) | |
617 | goto out; | |
618 | ||
8fe2f1d5 | 619 | /* clear the bulk endpoint */ |
0dc641dc | 620 | if (gspca_dev->bulk) |
8fe2f1d5 | 621 | usb_clear_halt(gspca_dev->dev, |
50e06dee | 622 | gspca_dev->urb[0]->pipe); |
8fe2f1d5 | 623 | |
63eb9546 | 624 | /* start the cam */ |
72ab97ce JFM |
625 | ret = gspca_dev->sd_desc->start(gspca_dev); |
626 | if (ret < 0) { | |
627 | destroy_urbs(gspca_dev); | |
628 | goto out; | |
629 | } | |
63eb9546 | 630 | gspca_dev->streaming = 1; |
63eb9546 | 631 | |
dff369aa | 632 | /* some bulk transfers are started by the subdriver */ |
0dc641dc | 633 | if (gspca_dev->bulk && gspca_dev->cam.bulk_nurbs == 0) |
51977a8d JFM |
634 | break; |
635 | ||
63eb9546 | 636 | /* submit the URBs */ |
d43fa32f | 637 | for (n = 0; n < gspca_dev->nurbs; n++) { |
4aa0d037 | 638 | ret = usb_submit_urb(gspca_dev->urb[n], GFP_KERNEL); |
63eb9546 JFM |
639 | if (ret < 0) { |
640 | PDEBUG(D_ERR|D_STREAM, | |
641 | "usb_submit_urb [%d] err %d", n, ret); | |
e2997a72 | 642 | gspca_dev->streaming = 0; |
d43fa32f | 643 | destroy_urbs(gspca_dev); |
9edf1a69 | 644 | if (ret == -ENOSPC) { |
abf485fe | 645 | msleep(20); /* wait for kill |
9edf1a69 | 646 | * complete */ |
63eb9546 | 647 | break; /* try the previous alt */ |
9edf1a69 | 648 | } |
63eb9546 JFM |
649 | goto out; |
650 | } | |
651 | } | |
652 | if (ret >= 0) | |
653 | break; | |
654 | } | |
655 | out: | |
656 | mutex_unlock(&gspca_dev->usb_lock); | |
657 | return ret; | |
658 | } | |
659 | ||
660 | static int gspca_set_alt0(struct gspca_dev *gspca_dev) | |
661 | { | |
662 | int ret; | |
663 | ||
664 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0); | |
665 | if (ret < 0) | |
f955c4fc | 666 | PDEBUG(D_ERR|D_STREAM, "set alt 0 err %d", ret); |
63eb9546 JFM |
667 | return ret; |
668 | } | |
669 | ||
219423c1 | 670 | /* Note: both the queue and the usb locks should be held when calling this */ |
63eb9546 JFM |
671 | static void gspca_stream_off(struct gspca_dev *gspca_dev) |
672 | { | |
63eb9546 | 673 | gspca_dev->streaming = 0; |
090264e5 JFM |
674 | if (gspca_dev->present) { |
675 | if (gspca_dev->sd_desc->stopN) | |
676 | gspca_dev->sd_desc->stopN(gspca_dev); | |
677 | destroy_urbs(gspca_dev); | |
d08e2ce0 | 678 | gspca_set_alt0(gspca_dev); |
090264e5 JFM |
679 | } |
680 | ||
681 | /* always call stop0 to free the subdriver's resources */ | |
98522a7b JFM |
682 | if (gspca_dev->sd_desc->stop0) |
683 | gspca_dev->sd_desc->stop0(gspca_dev); | |
684 | PDEBUG(D_STREAM, "stream off OK"); | |
63eb9546 JFM |
685 | } |
686 | ||
d43fa32f | 687 | static void gspca_set_default_mode(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
688 | { |
689 | int i; | |
690 | ||
691 | i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ | |
692 | gspca_dev->curr_mode = i; | |
693 | gspca_dev->width = gspca_dev->cam.cam_mode[i].width; | |
694 | gspca_dev->height = gspca_dev->cam.cam_mode[i].height; | |
c2446b3e | 695 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
696 | } |
697 | ||
698 | static int wxh_to_mode(struct gspca_dev *gspca_dev, | |
699 | int width, int height) | |
700 | { | |
701 | int i; | |
702 | ||
d43fa32f JFM |
703 | for (i = gspca_dev->cam.nmodes; --i > 0; ) { |
704 | if (width >= gspca_dev->cam.cam_mode[i].width | |
705 | && height >= gspca_dev->cam.cam_mode[i].height) | |
63eb9546 JFM |
706 | break; |
707 | } | |
63eb9546 JFM |
708 | return i; |
709 | } | |
710 | ||
63eb9546 JFM |
711 | /* |
712 | * search a mode with the right pixel format | |
713 | */ | |
714 | static int gspca_get_mode(struct gspca_dev *gspca_dev, | |
715 | int mode, | |
716 | int pixfmt) | |
717 | { | |
718 | int modeU, modeD; | |
719 | ||
720 | modeU = modeD = mode; | |
721 | while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { | |
722 | if (--modeD >= 0) { | |
c2446b3e JFM |
723 | if (gspca_dev->cam.cam_mode[modeD].pixelformat |
724 | == pixfmt) | |
63eb9546 JFM |
725 | return modeD; |
726 | } | |
727 | if (++modeU < gspca_dev->cam.nmodes) { | |
c2446b3e JFM |
728 | if (gspca_dev->cam.cam_mode[modeU].pixelformat |
729 | == pixfmt) | |
63eb9546 JFM |
730 | return modeU; |
731 | } | |
732 | } | |
733 | return -EINVAL; | |
734 | } | |
735 | ||
e078770a | 736 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
737 | struct v4l2_fmtdesc *fmtdesc) |
738 | { | |
739 | struct gspca_dev *gspca_dev = priv; | |
6a7eba24 | 740 | int i, j, index; |
63eb9546 JFM |
741 | __u32 fmt_tb[8]; |
742 | ||
63eb9546 JFM |
743 | /* give an index to each format */ |
744 | index = 0; | |
745 | j = 0; | |
746 | for (i = gspca_dev->cam.nmodes; --i >= 0; ) { | |
c2446b3e | 747 | fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
748 | j = 0; |
749 | for (;;) { | |
750 | if (fmt_tb[j] == fmt_tb[index]) | |
751 | break; | |
752 | j++; | |
753 | } | |
754 | if (j == index) { | |
755 | if (fmtdesc->index == index) | |
756 | break; /* new format */ | |
757 | index++; | |
80297125 | 758 | if (index >= ARRAY_SIZE(fmt_tb)) |
63eb9546 JFM |
759 | return -EINVAL; |
760 | } | |
761 | } | |
762 | if (i < 0) | |
763 | return -EINVAL; /* no more format */ | |
764 | ||
63eb9546 JFM |
765 | fmtdesc->pixelformat = fmt_tb[index]; |
766 | if (gspca_is_compressed(fmt_tb[index])) | |
767 | fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; | |
768 | fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; | |
769 | fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; | |
770 | fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; | |
771 | fmtdesc->description[3] = fmtdesc->pixelformat >> 24; | |
772 | fmtdesc->description[4] = '\0'; | |
773 | return 0; | |
774 | } | |
775 | ||
e078770a | 776 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
777 | struct v4l2_format *fmt) |
778 | { | |
779 | struct gspca_dev *gspca_dev = priv; | |
c2446b3e | 780 | int mode; |
63eb9546 | 781 | |
c2446b3e JFM |
782 | mode = gspca_dev->curr_mode; |
783 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], | |
784 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
785 | return 0; |
786 | } | |
787 | ||
e078770a | 788 | static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
789 | struct v4l2_format *fmt) |
790 | { | |
24c530b4 | 791 | int w, h, mode, mode2; |
63eb9546 | 792 | |
4aa0d037 JFM |
793 | w = fmt->fmt.pix.width; |
794 | h = fmt->fmt.pix.height; | |
d43fa32f | 795 | |
335b3f88 | 796 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
797 | if (gspca_debug & D_CONF) |
798 | PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h); | |
799 | #endif | |
800 | /* search the closest mode for width and height */ | |
801 | mode = wxh_to_mode(gspca_dev, w, h); | |
802 | ||
803 | /* OK if right palette */ | |
c2446b3e JFM |
804 | if (gspca_dev->cam.cam_mode[mode].pixelformat |
805 | != fmt->fmt.pix.pixelformat) { | |
63eb9546 JFM |
806 | |
807 | /* else, search the closest mode with the same pixel format */ | |
808 | mode2 = gspca_get_mode(gspca_dev, mode, | |
809 | fmt->fmt.pix.pixelformat); | |
c2446b3e | 810 | if (mode2 >= 0) |
63eb9546 | 811 | mode = mode2; |
c2446b3e JFM |
812 | /* else |
813 | ; * no chance, return this mode */ | |
63eb9546 | 814 | } |
c2446b3e JFM |
815 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], |
816 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
817 | return mode; /* used when s_fmt */ |
818 | } | |
819 | ||
e078770a | 820 | static int vidioc_try_fmt_vid_cap(struct file *file, |
63eb9546 JFM |
821 | void *priv, |
822 | struct v4l2_format *fmt) | |
823 | { | |
4aa0d037 | 824 | struct gspca_dev *gspca_dev = priv; |
63eb9546 JFM |
825 | int ret; |
826 | ||
e078770a | 827 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
828 | if (ret < 0) |
829 | return ret; | |
830 | return 0; | |
831 | } | |
832 | ||
e078770a | 833 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
834 | struct v4l2_format *fmt) |
835 | { | |
836 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 837 | int ret; |
63eb9546 | 838 | |
e2997a72 HG |
839 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
840 | return -ERESTARTSYS; | |
d43fa32f | 841 | |
e078770a | 842 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
843 | if (ret < 0) |
844 | goto out; | |
845 | ||
d43fa32f JFM |
846 | if (gspca_dev->nframes != 0 |
847 | && fmt->fmt.pix.sizeimage > gspca_dev->frsz) { | |
848 | ret = -EINVAL; | |
849 | goto out; | |
850 | } | |
851 | ||
50a871fe JFM |
852 | if (ret == gspca_dev->curr_mode) { |
853 | ret = 0; | |
63eb9546 | 854 | goto out; /* same mode */ |
50a871fe | 855 | } |
d43fa32f JFM |
856 | |
857 | if (gspca_dev->streaming) { | |
858 | ret = -EBUSY; | |
859 | goto out; | |
e2997a72 | 860 | } |
4aa0d037 JFM |
861 | gspca_dev->width = fmt->fmt.pix.width; |
862 | gspca_dev->height = fmt->fmt.pix.height; | |
63eb9546 JFM |
863 | gspca_dev->pixfmt = fmt->fmt.pix.pixelformat; |
864 | gspca_dev->curr_mode = ret; | |
d43fa32f | 865 | |
d43fa32f | 866 | ret = 0; |
63eb9546 JFM |
867 | out: |
868 | mutex_unlock(&gspca_dev->queue_lock); | |
869 | return ret; | |
870 | } | |
871 | ||
d0182306 | 872 | static void gspca_release(struct video_device *vfd) |
6b060ffe | 873 | { |
d0182306 | 874 | struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev); |
6b060ffe | 875 | |
d0182306 | 876 | PDEBUG(D_STREAM, "device released"); |
6b060ffe FZ |
877 | |
878 | kfree(gspca_dev->usb_buf); | |
879 | kfree(gspca_dev); | |
880 | } | |
881 | ||
bec43661 | 882 | static int dev_open(struct file *file) |
63eb9546 JFM |
883 | { |
884 | struct gspca_dev *gspca_dev; | |
885 | int ret; | |
886 | ||
d43fa32f | 887 | PDEBUG(D_STREAM, "%s open", current->comm); |
a12ca6a6 | 888 | gspca_dev = (struct gspca_dev *) video_devdata(file); |
e2997a72 HG |
889 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
890 | return -ERESTARTSYS; | |
63eb9546 JFM |
891 | if (!gspca_dev->present) { |
892 | ret = -ENODEV; | |
893 | goto out; | |
894 | } | |
895 | ||
012d6b02 | 896 | if (gspca_dev->users > 4) { /* (arbitrary value) */ |
63eb9546 JFM |
897 | ret = -EBUSY; |
898 | goto out; | |
899 | } | |
5c4fa002 JFM |
900 | |
901 | /* protect the subdriver against rmmod */ | |
902 | if (!try_module_get(gspca_dev->module)) { | |
903 | ret = -ENODEV; | |
904 | goto out; | |
905 | } | |
906 | ||
63eb9546 | 907 | gspca_dev->users++; |
6b060ffe | 908 | |
63eb9546 | 909 | file->private_data = gspca_dev; |
335b3f88 | 910 | #ifdef GSPCA_DEBUG |
63eb9546 | 911 | /* activate the v4l2 debug */ |
d43fa32f | 912 | if (gspca_debug & D_V4L2) |
a12ca6a6 | 913 | gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL |
9de436cf | 914 | | V4L2_DEBUG_IOCTL_ARG; |
63eb9546 | 915 | else |
a12ca6a6 | 916 | gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL |
9de436cf | 917 | | V4L2_DEBUG_IOCTL_ARG); |
63eb9546 | 918 | #endif |
012d6b02 | 919 | ret = 0; |
63eb9546 JFM |
920 | out: |
921 | mutex_unlock(&gspca_dev->queue_lock); | |
922 | if (ret != 0) | |
923 | PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret); | |
924 | else | |
d43fa32f | 925 | PDEBUG(D_STREAM, "open done"); |
63eb9546 JFM |
926 | return ret; |
927 | } | |
928 | ||
bec43661 | 929 | static int dev_close(struct file *file) |
63eb9546 JFM |
930 | { |
931 | struct gspca_dev *gspca_dev = file->private_data; | |
932 | ||
d43fa32f | 933 | PDEBUG(D_STREAM, "%s close", current->comm); |
e2997a72 HG |
934 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
935 | return -ERESTARTSYS; | |
936 | gspca_dev->users--; | |
e2997a72 | 937 | |
5b77ae77 | 938 | /* if the file did the capture, free the streaming resources */ |
4aa0d037 | 939 | if (gspca_dev->capt_file == file) { |
a1e8288b JFM |
940 | if (gspca_dev->streaming) { |
941 | mutex_lock(&gspca_dev->usb_lock); | |
942 | gspca_stream_off(gspca_dev); | |
943 | mutex_unlock(&gspca_dev->usb_lock); | |
944 | } | |
4aa0d037 | 945 | frame_free(gspca_dev); |
efab8211 | 946 | gspca_dev->capt_file = NULL; |
d43fa32f | 947 | gspca_dev->memory = GSPCA_MEMORY_NO; |
4aa0d037 | 948 | } |
d43fa32f | 949 | file->private_data = NULL; |
5c4fa002 | 950 | module_put(gspca_dev->module); |
63eb9546 | 951 | mutex_unlock(&gspca_dev->queue_lock); |
6b060ffe | 952 | |
d43fa32f | 953 | PDEBUG(D_STREAM, "close done"); |
6b060ffe | 954 | |
63eb9546 JFM |
955 | return 0; |
956 | } | |
957 | ||
958 | static int vidioc_querycap(struct file *file, void *priv, | |
959 | struct v4l2_capability *cap) | |
960 | { | |
961 | struct gspca_dev *gspca_dev = priv; | |
090264e5 | 962 | int ret; |
63eb9546 | 963 | |
090264e5 JFM |
964 | /* protect the access to the usb device */ |
965 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
966 | return -ERESTARTSYS; | |
967 | if (!gspca_dev->present) { | |
968 | ret = -ENODEV; | |
969 | goto out; | |
970 | } | |
63eb9546 | 971 | strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver); |
c6edaf16 JFM |
972 | if (gspca_dev->dev->product != NULL) { |
973 | strncpy(cap->card, gspca_dev->dev->product, | |
974 | sizeof cap->card); | |
975 | } else { | |
976 | snprintf(cap->card, sizeof cap->card, | |
977 | "USB Camera (%04x:%04x)", | |
978 | le16_to_cpu(gspca_dev->dev->descriptor.idVendor), | |
979 | le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); | |
980 | } | |
5932028f | 981 | usb_make_path(gspca_dev->dev, cap->bus_info, sizeof(cap->bus_info)); |
63eb9546 JFM |
982 | cap->version = DRIVER_VERSION_NUMBER; |
983 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | |
984 | | V4L2_CAP_STREAMING | |
985 | | V4L2_CAP_READWRITE; | |
090264e5 JFM |
986 | ret = 0; |
987 | out: | |
988 | mutex_unlock(&gspca_dev->usb_lock); | |
989 | return ret; | |
63eb9546 JFM |
990 | } |
991 | ||
992 | static int vidioc_queryctrl(struct file *file, void *priv, | |
993 | struct v4l2_queryctrl *q_ctrl) | |
994 | { | |
995 | struct gspca_dev *gspca_dev = priv; | |
f50ba1be | 996 | int i, ix; |
6a7eba24 JFM |
997 | u32 id; |
998 | ||
f50ba1be | 999 | ix = -1; |
6a7eba24 JFM |
1000 | id = q_ctrl->id; |
1001 | if (id & V4L2_CTRL_FLAG_NEXT_CTRL) { | |
1002 | id &= V4L2_CTRL_ID_MASK; | |
1003 | id++; | |
1004 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
0f523c2f | 1005 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id) |
f50ba1be JFM |
1006 | continue; |
1007 | if (ix < 0) { | |
1008 | ix = i; | |
1009 | continue; | |
6a7eba24 | 1010 | } |
f50ba1be JFM |
1011 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id |
1012 | > gspca_dev->sd_desc->ctrls[ix].qctrl.id) | |
1013 | continue; | |
1014 | ix = i; | |
6a7eba24 | 1015 | } |
6a7eba24 | 1016 | } |
63eb9546 | 1017 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { |
6a7eba24 | 1018 | if (id == gspca_dev->sd_desc->ctrls[i].qctrl.id) { |
f50ba1be JFM |
1019 | ix = i; |
1020 | break; | |
63eb9546 JFM |
1021 | } |
1022 | } | |
f50ba1be JFM |
1023 | if (ix < 0) |
1024 | return -EINVAL; | |
1025 | memcpy(q_ctrl, &gspca_dev->sd_desc->ctrls[ix].qctrl, | |
1026 | sizeof *q_ctrl); | |
1027 | if (gspca_dev->ctrl_dis & (1 << ix)) | |
1028 | q_ctrl->flags |= V4L2_CTRL_FLAG_DISABLED; | |
1029 | return 0; | |
63eb9546 JFM |
1030 | } |
1031 | ||
1032 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
1033 | struct v4l2_control *ctrl) | |
1034 | { | |
1035 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 1036 | const struct ctrl *ctrls; |
63eb9546 JFM |
1037 | int i, ret; |
1038 | ||
63eb9546 JFM |
1039 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; |
1040 | i < gspca_dev->sd_desc->nctrls; | |
1041 | i++, ctrls++) { | |
1042 | if (ctrl->id != ctrls->qctrl.id) | |
1043 | continue; | |
0f523c2f HG |
1044 | if (gspca_dev->ctrl_dis & (1 << i)) |
1045 | return -EINVAL; | |
63eb9546 | 1046 | if (ctrl->value < ctrls->qctrl.minimum |
fcf5cb24 | 1047 | || ctrl->value > ctrls->qctrl.maximum) |
63eb9546 JFM |
1048 | return -ERANGE; |
1049 | PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value); | |
e2997a72 HG |
1050 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1051 | return -ERESTARTSYS; | |
090264e5 JFM |
1052 | if (gspca_dev->present) |
1053 | ret = ctrls->set(gspca_dev, ctrl->value); | |
1054 | else | |
1055 | ret = -ENODEV; | |
63eb9546 JFM |
1056 | mutex_unlock(&gspca_dev->usb_lock); |
1057 | return ret; | |
1058 | } | |
1059 | return -EINVAL; | |
1060 | } | |
1061 | ||
1062 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
1063 | struct v4l2_control *ctrl) | |
1064 | { | |
1065 | struct gspca_dev *gspca_dev = priv; | |
1066 | ||
a5ae2062 | 1067 | const struct ctrl *ctrls; |
63eb9546 JFM |
1068 | int i, ret; |
1069 | ||
1070 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; | |
1071 | i < gspca_dev->sd_desc->nctrls; | |
1072 | i++, ctrls++) { | |
1073 | if (ctrl->id != ctrls->qctrl.id) | |
1074 | continue; | |
0f523c2f HG |
1075 | if (gspca_dev->ctrl_dis & (1 << i)) |
1076 | return -EINVAL; | |
e2997a72 HG |
1077 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1078 | return -ERESTARTSYS; | |
090264e5 JFM |
1079 | if (gspca_dev->present) |
1080 | ret = ctrls->get(gspca_dev, &ctrl->value); | |
1081 | else | |
1082 | ret = -ENODEV; | |
63eb9546 JFM |
1083 | mutex_unlock(&gspca_dev->usb_lock); |
1084 | return ret; | |
1085 | } | |
1086 | return -EINVAL; | |
1087 | } | |
1088 | ||
f955c4fc JFM |
1089 | /*fixme: have an audio flag in gspca_dev?*/ |
1090 | static int vidioc_s_audio(struct file *file, void *priv, | |
1091 | struct v4l2_audio *audio) | |
1092 | { | |
1093 | if (audio->index != 0) | |
1094 | return -EINVAL; | |
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | static int vidioc_g_audio(struct file *file, void *priv, | |
1099 | struct v4l2_audio *audio) | |
1100 | { | |
f955c4fc JFM |
1101 | strcpy(audio->name, "Microphone"); |
1102 | return 0; | |
1103 | } | |
1104 | ||
1105 | static int vidioc_enumaudio(struct file *file, void *priv, | |
1106 | struct v4l2_audio *audio) | |
1107 | { | |
1108 | if (audio->index != 0) | |
1109 | return -EINVAL; | |
1110 | ||
1111 | strcpy(audio->name, "Microphone"); | |
1112 | audio->capability = 0; | |
1113 | audio->mode = 0; | |
1114 | return 0; | |
1115 | } | |
1116 | ||
63eb9546 JFM |
1117 | static int vidioc_querymenu(struct file *file, void *priv, |
1118 | struct v4l2_querymenu *qmenu) | |
1119 | { | |
1120 | struct gspca_dev *gspca_dev = priv; | |
1121 | ||
1122 | if (!gspca_dev->sd_desc->querymenu) | |
1123 | return -EINVAL; | |
1124 | return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu); | |
1125 | } | |
1126 | ||
1127 | static int vidioc_enum_input(struct file *file, void *priv, | |
1128 | struct v4l2_input *input) | |
1129 | { | |
1130 | struct gspca_dev *gspca_dev = priv; | |
1131 | ||
1132 | if (input->index != 0) | |
1133 | return -EINVAL; | |
63eb9546 | 1134 | input->type = V4L2_INPUT_TYPE_CAMERA; |
dfa76fa2 | 1135 | input->status = gspca_dev->cam.input_flags; |
63eb9546 JFM |
1136 | strncpy(input->name, gspca_dev->sd_desc->name, |
1137 | sizeof input->name); | |
1138 | return 0; | |
1139 | } | |
1140 | ||
1141 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) | |
1142 | { | |
1143 | *i = 0; | |
1144 | return 0; | |
1145 | } | |
1146 | ||
1147 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) | |
1148 | { | |
1149 | if (i > 0) | |
1150 | return -EINVAL; | |
1151 | return (0); | |
1152 | } | |
1153 | ||
1154 | static int vidioc_reqbufs(struct file *file, void *priv, | |
1155 | struct v4l2_requestbuffers *rb) | |
1156 | { | |
1157 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 1158 | int i, ret = 0; |
63eb9546 | 1159 | |
d43fa32f | 1160 | switch (rb->memory) { |
5b77ae77 | 1161 | case GSPCA_MEMORY_READ: /* (internal call) */ |
d43fa32f | 1162 | case V4L2_MEMORY_MMAP: |
d43fa32f | 1163 | case V4L2_MEMORY_USERPTR: |
6a7eba24 | 1164 | break; |
d43fa32f | 1165 | default: |
63eb9546 | 1166 | return -EINVAL; |
d43fa32f | 1167 | } |
e2997a72 HG |
1168 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1169 | return -ERESTARTSYS; | |
d43fa32f | 1170 | |
5b77ae77 JFM |
1171 | if (gspca_dev->memory != GSPCA_MEMORY_NO |
1172 | && gspca_dev->memory != rb->memory) { | |
4aa0d037 JFM |
1173 | ret = -EBUSY; |
1174 | goto out; | |
1175 | } | |
d43fa32f | 1176 | |
5b77ae77 JFM |
1177 | /* only one file may do the capture */ |
1178 | if (gspca_dev->capt_file != NULL | |
1179 | && gspca_dev->capt_file != file) { | |
1180 | ret = -EBUSY; | |
1181 | goto out; | |
1182 | } | |
1183 | ||
1184 | /* if allocated, the buffers must not be mapped */ | |
1185 | for (i = 0; i < gspca_dev->nframes; i++) { | |
1186 | if (gspca_dev->frame[i].vma_use_count) { | |
ac0d6df6 JFM |
1187 | ret = -EBUSY; |
1188 | goto out; | |
1189 | } | |
5b77ae77 JFM |
1190 | } |
1191 | ||
1192 | /* stop streaming */ | |
1193 | if (gspca_dev->streaming) { | |
1194 | mutex_lock(&gspca_dev->usb_lock); | |
1195 | gspca_stream_off(gspca_dev); | |
1196 | mutex_unlock(&gspca_dev->usb_lock); | |
1197 | } | |
1198 | ||
1199 | /* free the previous allocated buffers, if any */ | |
1200 | if (gspca_dev->nframes != 0) { | |
1201 | frame_free(gspca_dev); | |
1202 | gspca_dev->capt_file = NULL; | |
1203 | } | |
1204 | if (rb->count == 0) /* unrequest */ | |
1205 | goto out; | |
1206 | gspca_dev->memory = rb->memory; | |
1207 | ret = frame_alloc(gspca_dev, rb->count); | |
1208 | if (ret == 0) { | |
1209 | rb->count = gspca_dev->nframes; | |
1210 | gspca_dev->capt_file = file; | |
4aa0d037 JFM |
1211 | } |
1212 | out: | |
63eb9546 JFM |
1213 | mutex_unlock(&gspca_dev->queue_lock); |
1214 | PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count); | |
1215 | return ret; | |
1216 | } | |
1217 | ||
1218 | static int vidioc_querybuf(struct file *file, void *priv, | |
1219 | struct v4l2_buffer *v4l2_buf) | |
1220 | { | |
1221 | struct gspca_dev *gspca_dev = priv; | |
1222 | struct gspca_frame *frame; | |
1223 | ||
13752bd9 | 1224 | if (v4l2_buf->index < 0 |
63eb9546 JFM |
1225 | || v4l2_buf->index >= gspca_dev->nframes) |
1226 | return -EINVAL; | |
1227 | ||
1228 | frame = &gspca_dev->frame[v4l2_buf->index]; | |
1229 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | static int vidioc_streamon(struct file *file, void *priv, | |
1234 | enum v4l2_buf_type buf_type) | |
1235 | { | |
1236 | struct gspca_dev *gspca_dev = priv; | |
1237 | int ret; | |
1238 | ||
63eb9546 JFM |
1239 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1240 | return -EINVAL; | |
e2997a72 HG |
1241 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1242 | return -ERESTARTSYS; | |
090264e5 | 1243 | |
1edabe71 JFM |
1244 | if (gspca_dev->nframes == 0 |
1245 | || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) { | |
63eb9546 JFM |
1246 | ret = -EINVAL; |
1247 | goto out; | |
1248 | } | |
1249 | if (!gspca_dev->streaming) { | |
1250 | ret = gspca_init_transfer(gspca_dev); | |
1251 | if (ret < 0) | |
1252 | goto out; | |
1253 | } | |
335b3f88 | 1254 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
1255 | if (gspca_debug & D_STREAM) { |
1256 | PDEBUG_MODE("stream on OK", | |
1257 | gspca_dev->pixfmt, | |
1258 | gspca_dev->width, | |
1259 | gspca_dev->height); | |
1260 | } | |
1261 | #endif | |
e2997a72 | 1262 | ret = 0; |
63eb9546 JFM |
1263 | out: |
1264 | mutex_unlock(&gspca_dev->queue_lock); | |
1265 | return ret; | |
1266 | } | |
1267 | ||
1268 | static int vidioc_streamoff(struct file *file, void *priv, | |
1269 | enum v4l2_buf_type buf_type) | |
1270 | { | |
1271 | struct gspca_dev *gspca_dev = priv; | |
5b77ae77 | 1272 | int i, ret; |
63eb9546 | 1273 | |
63eb9546 JFM |
1274 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1275 | return -EINVAL; | |
4aa0d037 JFM |
1276 | if (!gspca_dev->streaming) |
1277 | return 0; | |
1278 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1279 | return -ERESTARTSYS; | |
5b77ae77 JFM |
1280 | |
1281 | /* stop streaming */ | |
4aa0d037 JFM |
1282 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { |
1283 | ret = -ERESTARTSYS; | |
1284 | goto out; | |
63eb9546 | 1285 | } |
4aa0d037 | 1286 | gspca_stream_off(gspca_dev); |
4aa0d037 | 1287 | mutex_unlock(&gspca_dev->usb_lock); |
5b77ae77 JFM |
1288 | |
1289 | /* empty the application queues */ | |
1290 | for (i = 0; i < gspca_dev->nframes; i++) | |
1291 | gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS; | |
1292 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
1293 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
1294 | gspca_dev->sequence = 0; | |
5b77ae77 | 1295 | ret = 0; |
4aa0d037 JFM |
1296 | out: |
1297 | mutex_unlock(&gspca_dev->queue_lock); | |
1298 | return ret; | |
63eb9546 JFM |
1299 | } |
1300 | ||
1301 | static int vidioc_g_jpegcomp(struct file *file, void *priv, | |
1302 | struct v4l2_jpegcompression *jpegcomp) | |
1303 | { | |
1304 | struct gspca_dev *gspca_dev = priv; | |
1305 | int ret; | |
1306 | ||
1307 | if (!gspca_dev->sd_desc->get_jcomp) | |
1308 | return -EINVAL; | |
e2997a72 HG |
1309 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1310 | return -ERESTARTSYS; | |
090264e5 JFM |
1311 | if (gspca_dev->present) |
1312 | ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); | |
1313 | else | |
1314 | ret = -ENODEV; | |
63eb9546 JFM |
1315 | mutex_unlock(&gspca_dev->usb_lock); |
1316 | return ret; | |
1317 | } | |
1318 | ||
1319 | static int vidioc_s_jpegcomp(struct file *file, void *priv, | |
1320 | struct v4l2_jpegcompression *jpegcomp) | |
1321 | { | |
1322 | struct gspca_dev *gspca_dev = priv; | |
1323 | int ret; | |
1324 | ||
63eb9546 JFM |
1325 | if (!gspca_dev->sd_desc->set_jcomp) |
1326 | return -EINVAL; | |
f86d4a91 JP |
1327 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1328 | return -ERESTARTSYS; | |
090264e5 JFM |
1329 | if (gspca_dev->present) |
1330 | ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); | |
1331 | else | |
1332 | ret = -ENODEV; | |
63eb9546 JFM |
1333 | mutex_unlock(&gspca_dev->usb_lock); |
1334 | return ret; | |
1335 | } | |
1336 | ||
1337 | static int vidioc_g_parm(struct file *filp, void *priv, | |
1338 | struct v4l2_streamparm *parm) | |
1339 | { | |
1340 | struct gspca_dev *gspca_dev = priv; | |
1341 | ||
63eb9546 | 1342 | parm->parm.capture.readbuffers = gspca_dev->nbufread; |
627a5ef7 JP |
1343 | |
1344 | if (gspca_dev->sd_desc->get_streamparm) { | |
1345 | int ret; | |
1346 | ||
1347 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1348 | return -ERESTARTSYS; | |
090264e5 JFM |
1349 | if (gspca_dev->present) |
1350 | ret = gspca_dev->sd_desc->get_streamparm(gspca_dev, | |
1351 | parm); | |
1352 | else | |
1353 | ret = -ENODEV; | |
627a5ef7 JP |
1354 | mutex_unlock(&gspca_dev->usb_lock); |
1355 | return ret; | |
1356 | } | |
1357 | ||
63eb9546 JFM |
1358 | return 0; |
1359 | } | |
1360 | ||
1361 | static int vidioc_s_parm(struct file *filp, void *priv, | |
1362 | struct v4l2_streamparm *parm) | |
1363 | { | |
1364 | struct gspca_dev *gspca_dev = priv; | |
1365 | int n; | |
1366 | ||
63eb9546 JFM |
1367 | n = parm->parm.capture.readbuffers; |
1368 | if (n == 0 || n > GSPCA_MAX_FRAMES) | |
1369 | parm->parm.capture.readbuffers = gspca_dev->nbufread; | |
1370 | else | |
1371 | gspca_dev->nbufread = n; | |
627a5ef7 JP |
1372 | |
1373 | if (gspca_dev->sd_desc->set_streamparm) { | |
1374 | int ret; | |
1375 | ||
1376 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1377 | return -ERESTARTSYS; | |
090264e5 JFM |
1378 | if (gspca_dev->present) |
1379 | ret = gspca_dev->sd_desc->set_streamparm(gspca_dev, | |
1380 | parm); | |
1381 | else | |
1382 | ret = -ENODEV; | |
627a5ef7 JP |
1383 | mutex_unlock(&gspca_dev->usb_lock); |
1384 | return ret; | |
1385 | } | |
1386 | ||
63eb9546 JFM |
1387 | return 0; |
1388 | } | |
1389 | ||
6a7eba24 JFM |
1390 | static int vidioc_s_std(struct file *filp, void *priv, |
1391 | v4l2_std_id *parm) | |
1392 | { | |
1393 | return 0; | |
1394 | } | |
1395 | ||
63eb9546 JFM |
1396 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
1397 | static int vidiocgmbuf(struct file *file, void *priv, | |
1398 | struct video_mbuf *mbuf) | |
1399 | { | |
1400 | struct gspca_dev *gspca_dev = file->private_data; | |
1401 | int i; | |
1402 | ||
1403 | PDEBUG(D_STREAM, "cgmbuf"); | |
1404 | if (gspca_dev->nframes == 0) { | |
63eb9546 | 1405 | int ret; |
6a7eba24 JFM |
1406 | |
1407 | { | |
1408 | struct v4l2_format fmt; | |
1409 | ||
6a7eba24 JFM |
1410 | fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
1411 | i = gspca_dev->cam.nmodes - 1; /* highest mode */ | |
1412 | fmt.fmt.pix.width = gspca_dev->cam.cam_mode[i].width; | |
1413 | fmt.fmt.pix.height = gspca_dev->cam.cam_mode[i].height; | |
1414 | fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR24; | |
e078770a | 1415 | ret = vidioc_s_fmt_vid_cap(file, priv, &fmt); |
6a7eba24 JFM |
1416 | if (ret != 0) |
1417 | return ret; | |
1418 | } | |
1419 | { | |
1420 | struct v4l2_requestbuffers rb; | |
1421 | ||
1422 | memset(&rb, 0, sizeof rb); | |
1423 | rb.count = 4; | |
1424 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1425 | rb.memory = V4L2_MEMORY_MMAP; | |
1426 | ret = vidioc_reqbufs(file, priv, &rb); | |
1427 | if (ret != 0) | |
1428 | return ret; | |
1429 | } | |
63eb9546 JFM |
1430 | } |
1431 | mbuf->frames = gspca_dev->nframes; | |
1432 | mbuf->size = gspca_dev->frsz * gspca_dev->nframes; | |
1433 | for (i = 0; i < mbuf->frames; i++) | |
1434 | mbuf->offsets[i] = gspca_dev->frame[i].v4l2_buf.m.offset; | |
1435 | return 0; | |
1436 | } | |
1437 | #endif | |
1438 | ||
1439 | static int dev_mmap(struct file *file, struct vm_area_struct *vma) | |
1440 | { | |
1441 | struct gspca_dev *gspca_dev = file->private_data; | |
efab8211 | 1442 | struct gspca_frame *frame; |
63eb9546 JFM |
1443 | struct page *page; |
1444 | unsigned long addr, start, size; | |
1445 | int i, ret; | |
63eb9546 JFM |
1446 | |
1447 | start = vma->vm_start; | |
1448 | size = vma->vm_end - vma->vm_start; | |
1449 | PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size); | |
1450 | ||
e2997a72 HG |
1451 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1452 | return -ERESTARTSYS; | |
63eb9546 JFM |
1453 | if (!gspca_dev->present) { |
1454 | ret = -ENODEV; | |
4aa0d037 JFM |
1455 | goto out; |
1456 | } | |
1457 | if (gspca_dev->capt_file != file) { | |
1458 | ret = -EINVAL; | |
1459 | goto out; | |
63eb9546 JFM |
1460 | } |
1461 | ||
efab8211 | 1462 | frame = NULL; |
63eb9546 JFM |
1463 | for (i = 0; i < gspca_dev->nframes; ++i) { |
1464 | if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) { | |
1465 | PDEBUG(D_STREAM, "mmap bad memory type"); | |
1466 | break; | |
1467 | } | |
1468 | if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT) | |
1469 | == vma->vm_pgoff) { | |
1470 | frame = &gspca_dev->frame[i]; | |
1471 | break; | |
1472 | } | |
1473 | } | |
efab8211 | 1474 | if (frame == NULL) { |
63eb9546 JFM |
1475 | PDEBUG(D_STREAM, "mmap no frame buffer found"); |
1476 | ret = -EINVAL; | |
4aa0d037 | 1477 | goto out; |
63eb9546 JFM |
1478 | } |
1479 | #ifdef CONFIG_VIDEO_V4L1_COMPAT | |
ac0d6df6 JFM |
1480 | /* v4l1 maps all the buffers */ |
1481 | if (i != 0 | |
1482 | || size != frame->v4l2_buf.length * gspca_dev->nframes) | |
63eb9546 | 1483 | #endif |
ac0d6df6 | 1484 | if (size != frame->v4l2_buf.length) { |
63eb9546 JFM |
1485 | PDEBUG(D_STREAM, "mmap bad size"); |
1486 | ret = -EINVAL; | |
4aa0d037 | 1487 | goto out; |
63eb9546 JFM |
1488 | } |
1489 | ||
1490 | /* | |
1491 | * - VM_IO marks the area as being a mmaped region for I/O to a | |
1492 | * device. It also prevents the region from being core dumped. | |
1493 | */ | |
1494 | vma->vm_flags |= VM_IO; | |
1495 | ||
1496 | addr = (unsigned long) frame->data; | |
1497 | while (size > 0) { | |
1498 | page = vmalloc_to_page((void *) addr); | |
1499 | ret = vm_insert_page(vma, start, page); | |
1500 | if (ret < 0) | |
4aa0d037 | 1501 | goto out; |
63eb9546 JFM |
1502 | start += PAGE_SIZE; |
1503 | addr += PAGE_SIZE; | |
1504 | size -= PAGE_SIZE; | |
1505 | } | |
1506 | ||
1507 | vma->vm_ops = &gspca_vm_ops; | |
1508 | vma->vm_private_data = frame; | |
1509 | gspca_vm_open(vma); | |
e2997a72 | 1510 | ret = 0; |
4aa0d037 | 1511 | out: |
63eb9546 JFM |
1512 | mutex_unlock(&gspca_dev->queue_lock); |
1513 | return ret; | |
1514 | } | |
1515 | ||
63eb9546 JFM |
1516 | /* |
1517 | * wait for a video frame | |
1518 | * | |
1519 | * If a frame is ready, its index is returned. | |
1520 | */ | |
d43fa32f | 1521 | static int frame_wait(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1522 | int nonblock_ing) |
1523 | { | |
1524 | struct gspca_frame *frame; | |
1525 | int i, j, ret; | |
1526 | ||
d43fa32f | 1527 | /* check if a frame is ready */ |
63eb9546 JFM |
1528 | i = gspca_dev->fr_o; |
1529 | j = gspca_dev->fr_queue[i]; | |
1530 | frame = &gspca_dev->frame[j]; | |
63eb9546 | 1531 | |
181b704f HG |
1532 | if (!(frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE)) { |
1533 | if (nonblock_ing) | |
1534 | return -EAGAIN; | |
1535 | ||
1536 | /* wait till a frame is ready */ | |
4aa0d037 | 1537 | ret = wait_event_interruptible_timeout(gspca_dev->wq, |
181b704f HG |
1538 | (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) || |
1539 | !gspca_dev->streaming || !gspca_dev->present, | |
1540 | msecs_to_jiffies(3000)); | |
1541 | if (ret < 0) | |
1542 | return ret; | |
1543 | if (ret == 0 || !gspca_dev->streaming || !gspca_dev->present) | |
e2997a72 | 1544 | return -EIO; |
63eb9546 | 1545 | } |
181b704f | 1546 | |
63eb9546 JFM |
1547 | gspca_dev->fr_o = (i + 1) % gspca_dev->nframes; |
1548 | PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d", | |
1549 | gspca_dev->fr_q, | |
1550 | gspca_dev->fr_i, | |
1551 | gspca_dev->fr_o); | |
e2997a72 | 1552 | |
739570bb JFM |
1553 | if (gspca_dev->sd_desc->dq_callback) { |
1554 | mutex_lock(&gspca_dev->usb_lock); | |
090264e5 JFM |
1555 | if (gspca_dev->present) |
1556 | gspca_dev->sd_desc->dq_callback(gspca_dev); | |
739570bb JFM |
1557 | mutex_unlock(&gspca_dev->usb_lock); |
1558 | } | |
63eb9546 JFM |
1559 | return j; |
1560 | } | |
1561 | ||
1562 | /* | |
1563 | * dequeue a video buffer | |
1564 | * | |
1565 | * If nonblock_ing is false, block until a buffer is available. | |
1566 | */ | |
1567 | static int vidioc_dqbuf(struct file *file, void *priv, | |
1568 | struct v4l2_buffer *v4l2_buf) | |
1569 | { | |
1570 | struct gspca_dev *gspca_dev = priv; | |
1571 | struct gspca_frame *frame; | |
1572 | int i, ret; | |
1573 | ||
1574 | PDEBUG(D_FRAM, "dqbuf"); | |
ac0d6df6 | 1575 | if (v4l2_buf->memory != gspca_dev->memory) |
63eb9546 | 1576 | return -EINVAL; |
5b77ae77 | 1577 | |
090264e5 JFM |
1578 | if (!gspca_dev->present) |
1579 | return -ENODEV; | |
1580 | ||
5b77ae77 JFM |
1581 | /* if not streaming, be sure the application will not loop forever */ |
1582 | if (!(file->f_flags & O_NONBLOCK) | |
1583 | && !gspca_dev->streaming && gspca_dev->users == 1) | |
63eb9546 JFM |
1584 | return -EINVAL; |
1585 | ||
5b77ae77 JFM |
1586 | /* only the capturing file may dequeue */ |
1587 | if (gspca_dev->capt_file != file) | |
1588 | return -EINVAL; | |
1589 | ||
1590 | /* only one dequeue / read at a time */ | |
63eb9546 JFM |
1591 | if (mutex_lock_interruptible(&gspca_dev->read_lock)) |
1592 | return -ERESTARTSYS; | |
1593 | ||
d43fa32f | 1594 | ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK); |
63eb9546 | 1595 | if (ret < 0) |
4aa0d037 | 1596 | goto out; |
63eb9546 JFM |
1597 | i = ret; /* frame index */ |
1598 | frame = &gspca_dev->frame[i]; | |
ac0d6df6 | 1599 | if (gspca_dev->memory == V4L2_MEMORY_USERPTR) { |
c6eb8eaf | 1600 | if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr, |
ac0d6df6 JFM |
1601 | frame->data, |
1602 | frame->v4l2_buf.bytesused)) { | |
1603 | PDEBUG(D_ERR|D_STREAM, | |
1604 | "dqbuf cp to user failed"); | |
1605 | ret = -EFAULT; | |
1606 | goto out; | |
1607 | } | |
1608 | } | |
63eb9546 JFM |
1609 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; |
1610 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1611 | PDEBUG(D_FRAM, "dqbuf %d", i); | |
1612 | ret = 0; | |
4aa0d037 | 1613 | out: |
63eb9546 JFM |
1614 | mutex_unlock(&gspca_dev->read_lock); |
1615 | return ret; | |
1616 | } | |
1617 | ||
1618 | /* | |
1619 | * queue a video buffer | |
1620 | * | |
1621 | * Attempting to queue a buffer that has already been | |
1622 | * queued will return -EINVAL. | |
1623 | */ | |
1624 | static int vidioc_qbuf(struct file *file, void *priv, | |
1625 | struct v4l2_buffer *v4l2_buf) | |
1626 | { | |
1627 | struct gspca_dev *gspca_dev = priv; | |
1628 | struct gspca_frame *frame; | |
1629 | int i, index, ret; | |
1630 | ||
1631 | PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index); | |
63eb9546 | 1632 | |
5b77ae77 JFM |
1633 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1634 | return -ERESTARTSYS; | |
1635 | ||
63eb9546 JFM |
1636 | index = v4l2_buf->index; |
1637 | if ((unsigned) index >= gspca_dev->nframes) { | |
d43fa32f | 1638 | PDEBUG(D_FRAM, |
63eb9546 | 1639 | "qbuf idx %d >= %d", index, gspca_dev->nframes); |
5b77ae77 JFM |
1640 | ret = -EINVAL; |
1641 | goto out; | |
63eb9546 | 1642 | } |
5b77ae77 | 1643 | if (v4l2_buf->memory != gspca_dev->memory) { |
d43fa32f | 1644 | PDEBUG(D_FRAM, "qbuf bad memory type"); |
5b77ae77 JFM |
1645 | ret = -EINVAL; |
1646 | goto out; | |
63eb9546 | 1647 | } |
e2997a72 | 1648 | |
5b77ae77 | 1649 | frame = &gspca_dev->frame[index]; |
d43fa32f JFM |
1650 | if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) { |
1651 | PDEBUG(D_FRAM, "qbuf bad state"); | |
63eb9546 JFM |
1652 | ret = -EINVAL; |
1653 | goto out; | |
1654 | } | |
1655 | ||
1656 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED; | |
63eb9546 | 1657 | |
d43fa32f | 1658 | if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) { |
63eb9546 JFM |
1659 | frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr; |
1660 | frame->v4l2_buf.length = v4l2_buf->length; | |
1661 | } | |
1662 | ||
1663 | /* put the buffer in the 'queued' queue */ | |
1664 | i = gspca_dev->fr_q; | |
1665 | gspca_dev->fr_queue[i] = index; | |
1666 | gspca_dev->fr_q = (i + 1) % gspca_dev->nframes; | |
1667 | PDEBUG(D_FRAM, "qbuf q:%d i:%d o:%d", | |
1668 | gspca_dev->fr_q, | |
1669 | gspca_dev->fr_i, | |
1670 | gspca_dev->fr_o); | |
1671 | ||
1672 | v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED; | |
1673 | v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE; | |
1674 | ret = 0; | |
1675 | out: | |
1676 | mutex_unlock(&gspca_dev->queue_lock); | |
1677 | return ret; | |
1678 | } | |
1679 | ||
d43fa32f JFM |
1680 | /* |
1681 | * allocate the resources for read() | |
1682 | */ | |
1683 | static int read_alloc(struct gspca_dev *gspca_dev, | |
1684 | struct file *file) | |
63eb9546 | 1685 | { |
63eb9546 | 1686 | struct v4l2_buffer v4l2_buf; |
d43fa32f | 1687 | int i, ret; |
63eb9546 | 1688 | |
d43fa32f | 1689 | PDEBUG(D_STREAM, "read alloc"); |
63eb9546 JFM |
1690 | if (gspca_dev->nframes == 0) { |
1691 | struct v4l2_requestbuffers rb; | |
1692 | ||
1693 | memset(&rb, 0, sizeof rb); | |
1694 | rb.count = gspca_dev->nbufread; | |
1695 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1696 | rb.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1697 | ret = vidioc_reqbufs(file, gspca_dev, &rb); |
1698 | if (ret != 0) { | |
d43fa32f | 1699 | PDEBUG(D_STREAM, "read reqbuf err %d", ret); |
63eb9546 JFM |
1700 | return ret; |
1701 | } | |
1702 | memset(&v4l2_buf, 0, sizeof v4l2_buf); | |
1703 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1704 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1705 | for (i = 0; i < gspca_dev->nbufread; i++) { |
1706 | v4l2_buf.index = i; | |
63eb9546 JFM |
1707 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); |
1708 | if (ret != 0) { | |
1709 | PDEBUG(D_STREAM, "read qbuf err: %d", ret); | |
1710 | return ret; | |
1711 | } | |
1712 | } | |
d43fa32f JFM |
1713 | gspca_dev->memory = GSPCA_MEMORY_READ; |
1714 | } | |
4aa0d037 | 1715 | |
d43fa32f JFM |
1716 | /* start streaming */ |
1717 | ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE); | |
1718 | if (ret != 0) | |
1719 | PDEBUG(D_STREAM, "read streamon err %d", ret); | |
1720 | return ret; | |
1721 | } | |
1722 | ||
1723 | static unsigned int dev_poll(struct file *file, poll_table *wait) | |
1724 | { | |
1725 | struct gspca_dev *gspca_dev = file->private_data; | |
1726 | int i, ret; | |
1727 | ||
1728 | PDEBUG(D_FRAM, "poll"); | |
1729 | ||
1730 | poll_wait(file, &gspca_dev->wq, wait); | |
d43fa32f | 1731 | |
5b77ae77 JFM |
1732 | /* if reqbufs is not done, the user would use read() */ |
1733 | if (gspca_dev->nframes == 0) { | |
1734 | if (gspca_dev->memory != GSPCA_MEMORY_NO) | |
1735 | return POLLERR; /* not the 1st time */ | |
d43fa32f | 1736 | ret = read_alloc(gspca_dev, file); |
5b77ae77 JFM |
1737 | if (ret != 0) |
1738 | return POLLERR; | |
63eb9546 JFM |
1739 | } |
1740 | ||
d43fa32f JFM |
1741 | if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) |
1742 | return POLLERR; | |
d43fa32f | 1743 | |
5b77ae77 | 1744 | /* check the next incoming buffer */ |
d43fa32f JFM |
1745 | i = gspca_dev->fr_o; |
1746 | i = gspca_dev->fr_queue[i]; | |
1747 | if (gspca_dev->frame[i].v4l2_buf.flags & V4L2_BUF_FLAG_DONE) | |
1748 | ret = POLLIN | POLLRDNORM; /* something to read */ | |
1749 | else | |
1750 | ret = 0; | |
d43fa32f | 1751 | mutex_unlock(&gspca_dev->queue_lock); |
090264e5 JFM |
1752 | if (!gspca_dev->present) |
1753 | return POLLHUP; | |
d43fa32f JFM |
1754 | return ret; |
1755 | } | |
1756 | ||
1757 | static ssize_t dev_read(struct file *file, char __user *data, | |
1758 | size_t count, loff_t *ppos) | |
1759 | { | |
1760 | struct gspca_dev *gspca_dev = file->private_data; | |
1761 | struct gspca_frame *frame; | |
1762 | struct v4l2_buffer v4l2_buf; | |
1763 | struct timeval timestamp; | |
82643d0e | 1764 | int n, ret, ret2; |
d43fa32f | 1765 | |
a9e11134 | 1766 | PDEBUG(D_FRAM, "read (%zd)", count); |
d43fa32f JFM |
1767 | if (!gspca_dev->present) |
1768 | return -ENODEV; | |
1769 | switch (gspca_dev->memory) { | |
1770 | case GSPCA_MEMORY_NO: /* first time */ | |
1771 | ret = read_alloc(gspca_dev, file); | |
1772 | if (ret != 0) | |
1773 | return ret; | |
1774 | break; | |
1775 | case GSPCA_MEMORY_READ: | |
82643d0e JFM |
1776 | if (gspca_dev->capt_file == file) |
1777 | break; | |
1778 | /* fall thru */ | |
d43fa32f JFM |
1779 | default: |
1780 | return -EINVAL; | |
1781 | } | |
1782 | ||
63eb9546 JFM |
1783 | /* get a frame */ |
1784 | jiffies_to_timeval(get_jiffies_64(), ×tamp); | |
1785 | timestamp.tv_sec--; | |
82643d0e JFM |
1786 | n = 2; |
1787 | for (;;) { | |
63eb9546 JFM |
1788 | memset(&v4l2_buf, 0, sizeof v4l2_buf); |
1789 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1790 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1791 | ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf); |
1792 | if (ret != 0) { | |
1793 | PDEBUG(D_STREAM, "read dqbuf err %d", ret); | |
1794 | return ret; | |
1795 | } | |
1796 | ||
1797 | /* if the process slept for more than 1 second, | |
219423c1 | 1798 | * get a newer frame */ |
63eb9546 | 1799 | frame = &gspca_dev->frame[v4l2_buf.index]; |
82643d0e JFM |
1800 | if (--n < 0) |
1801 | break; /* avoid infinite loop */ | |
63eb9546 JFM |
1802 | if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec) |
1803 | break; | |
1804 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1805 | if (ret != 0) { | |
1806 | PDEBUG(D_STREAM, "read qbuf err %d", ret); | |
1807 | return ret; | |
1808 | } | |
1809 | } | |
1810 | ||
1811 | /* copy the frame */ | |
ac0d6df6 JFM |
1812 | if (count > frame->v4l2_buf.bytesused) |
1813 | count = frame->v4l2_buf.bytesused; | |
63eb9546 JFM |
1814 | ret = copy_to_user(data, frame->data, count); |
1815 | if (ret != 0) { | |
1816 | PDEBUG(D_ERR|D_STREAM, | |
a9e11134 | 1817 | "read cp to user lack %d / %zd", ret, count); |
63eb9546 JFM |
1818 | ret = -EFAULT; |
1819 | goto out; | |
1820 | } | |
1821 | ret = count; | |
1822 | out: | |
1823 | /* in each case, requeue the buffer */ | |
1824 | ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1825 | if (ret2 != 0) | |
1826 | return ret2; | |
1827 | return ret; | |
1828 | } | |
1829 | ||
bec43661 | 1830 | static struct v4l2_file_operations dev_fops = { |
63eb9546 JFM |
1831 | .owner = THIS_MODULE, |
1832 | .open = dev_open, | |
1833 | .release = dev_close, | |
1834 | .read = dev_read, | |
1835 | .mmap = dev_mmap, | |
bec43661 | 1836 | .unlocked_ioctl = video_ioctl2, |
63eb9546 JFM |
1837 | .poll = dev_poll, |
1838 | }; | |
1839 | ||
a399810c | 1840 | static const struct v4l2_ioctl_ops dev_ioctl_ops = { |
63eb9546 JFM |
1841 | .vidioc_querycap = vidioc_querycap, |
1842 | .vidioc_dqbuf = vidioc_dqbuf, | |
1843 | .vidioc_qbuf = vidioc_qbuf, | |
e078770a MCC |
1844 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
1845 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
1846 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
1847 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
63eb9546 JFM |
1848 | .vidioc_streamon = vidioc_streamon, |
1849 | .vidioc_queryctrl = vidioc_queryctrl, | |
1850 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
1851 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
f955c4fc JFM |
1852 | .vidioc_g_audio = vidioc_g_audio, |
1853 | .vidioc_s_audio = vidioc_s_audio, | |
1854 | .vidioc_enumaudio = vidioc_enumaudio, | |
63eb9546 JFM |
1855 | .vidioc_querymenu = vidioc_querymenu, |
1856 | .vidioc_enum_input = vidioc_enum_input, | |
1857 | .vidioc_g_input = vidioc_g_input, | |
1858 | .vidioc_s_input = vidioc_s_input, | |
1859 | .vidioc_reqbufs = vidioc_reqbufs, | |
1860 | .vidioc_querybuf = vidioc_querybuf, | |
1861 | .vidioc_streamoff = vidioc_streamoff, | |
1862 | .vidioc_g_jpegcomp = vidioc_g_jpegcomp, | |
1863 | .vidioc_s_jpegcomp = vidioc_s_jpegcomp, | |
1864 | .vidioc_g_parm = vidioc_g_parm, | |
1865 | .vidioc_s_parm = vidioc_s_parm, | |
6a7eba24 | 1866 | .vidioc_s_std = vidioc_s_std, |
63eb9546 JFM |
1867 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
1868 | .vidiocgmbuf = vidiocgmbuf, | |
1869 | #endif | |
1870 | }; | |
1871 | ||
a399810c HV |
1872 | static struct video_device gspca_template = { |
1873 | .name = "gspca main driver", | |
a399810c HV |
1874 | .fops = &dev_fops, |
1875 | .ioctl_ops = &dev_ioctl_ops, | |
d0182306 | 1876 | .release = gspca_release, |
a399810c HV |
1877 | .minor = -1, |
1878 | }; | |
1879 | ||
63eb9546 JFM |
1880 | /* |
1881 | * probe and create a new gspca device | |
1882 | * | |
1883 | * This function must be called by the sub-driver when it is | |
1884 | * called for probing a new device. | |
1885 | */ | |
1886 | int gspca_dev_probe(struct usb_interface *intf, | |
1887 | const struct usb_device_id *id, | |
1888 | const struct sd_desc *sd_desc, | |
d43fa32f JFM |
1889 | int dev_size, |
1890 | struct module *module) | |
63eb9546 JFM |
1891 | { |
1892 | struct usb_interface_descriptor *interface; | |
1893 | struct gspca_dev *gspca_dev; | |
1894 | struct usb_device *dev = interface_to_usbdev(intf); | |
1895 | int ret; | |
63eb9546 | 1896 | |
6a7eba24 | 1897 | PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct); |
63eb9546 JFM |
1898 | |
1899 | /* we don't handle multi-config cameras */ | |
1900 | if (dev->descriptor.bNumConfigurations != 1) | |
1901 | return -ENODEV; | |
1902 | interface = &intf->cur_altsetting->desc; | |
1903 | if (interface->bInterfaceNumber > 0) | |
1904 | return -ENODEV; | |
1905 | ||
1906 | /* create the device */ | |
1907 | if (dev_size < sizeof *gspca_dev) | |
1908 | dev_size = sizeof *gspca_dev; | |
1909 | gspca_dev = kzalloc(dev_size, GFP_KERNEL); | |
e293e599 | 1910 | if (!gspca_dev) { |
63eb9546 | 1911 | err("couldn't kzalloc gspca struct"); |
e293e599 | 1912 | return -ENOMEM; |
63eb9546 | 1913 | } |
8295d99e JFM |
1914 | gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL); |
1915 | if (!gspca_dev->usb_buf) { | |
1916 | err("out of memory"); | |
e293e599 | 1917 | ret = -ENOMEM; |
8295d99e JFM |
1918 | goto out; |
1919 | } | |
63eb9546 JFM |
1920 | gspca_dev->dev = dev; |
1921 | gspca_dev->iface = interface->bInterfaceNumber; | |
d43fa32f | 1922 | gspca_dev->nbalt = intf->num_altsetting; |
63eb9546 | 1923 | gspca_dev->sd_desc = sd_desc; |
63eb9546 | 1924 | gspca_dev->nbufread = 2; |
ff374747 | 1925 | gspca_dev->empty_packet = -1; /* don't check the empty packets */ |
63eb9546 | 1926 | |
012d6b02 | 1927 | /* configure the subdriver and initialize the USB device */ |
ba38ee8e | 1928 | ret = sd_desc->config(gspca_dev, id); |
012d6b02 JFM |
1929 | if (ret < 0) |
1930 | goto out; | |
ba38ee8e | 1931 | ret = sd_desc->init(gspca_dev); |
63eb9546 JFM |
1932 | if (ret < 0) |
1933 | goto out; | |
1934 | ret = gspca_set_alt0(gspca_dev); | |
1935 | if (ret < 0) | |
1936 | goto out; | |
1937 | gspca_set_default_mode(gspca_dev); | |
1938 | ||
1939 | mutex_init(&gspca_dev->usb_lock); | |
1940 | mutex_init(&gspca_dev->read_lock); | |
1941 | mutex_init(&gspca_dev->queue_lock); | |
1942 | init_waitqueue_head(&gspca_dev->wq); | |
1943 | ||
1944 | /* init video stuff */ | |
ba38ee8e JFM |
1945 | memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template); |
1946 | gspca_dev->vdev.parent = &dev->dev; | |
5c4fa002 | 1947 | gspca_dev->module = module; |
ee56a4d3 | 1948 | gspca_dev->present = 1; |
a12ca6a6 | 1949 | ret = video_register_device(&gspca_dev->vdev, |
63eb9546 | 1950 | VFL_TYPE_GRABBER, |
8d584a53 | 1951 | -1); |
63eb9546 JFM |
1952 | if (ret < 0) { |
1953 | err("video_register_device err %d", ret); | |
1954 | goto out; | |
1955 | } | |
1956 | ||
63eb9546 JFM |
1957 | usb_set_intfdata(intf, gspca_dev); |
1958 | PDEBUG(D_PROBE, "probe ok"); | |
1959 | return 0; | |
1960 | out: | |
e07a1d8a JFM |
1961 | kfree(gspca_dev->usb_buf); |
1962 | kfree(gspca_dev); | |
63eb9546 JFM |
1963 | return ret; |
1964 | } | |
1965 | EXPORT_SYMBOL(gspca_dev_probe); | |
1966 | ||
1967 | /* | |
1968 | * USB disconnection | |
1969 | * | |
1970 | * This function must be called by the sub-driver | |
1971 | * when the device disconnects, after the specific resources are freed. | |
1972 | */ | |
1973 | void gspca_disconnect(struct usb_interface *intf) | |
1974 | { | |
4aa0d037 | 1975 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
63eb9546 | 1976 | |
ad28127d | 1977 | mutex_lock(&gspca_dev->usb_lock); |
6e4ae872 | 1978 | gspca_dev->present = 0; |
6e4ae872 | 1979 | |
090264e5 JFM |
1980 | if (gspca_dev->streaming) { |
1981 | destroy_urbs(gspca_dev); | |
1982 | wake_up_interruptible(&gspca_dev->wq); | |
1983 | } | |
1984 | ||
1985 | /* the device is freed at exit of this function */ | |
ad28127d | 1986 | gspca_dev->dev = NULL; |
090264e5 JFM |
1987 | mutex_unlock(&gspca_dev->usb_lock); |
1988 | ||
6b060ffe FZ |
1989 | usb_set_intfdata(intf, NULL); |
1990 | ||
a12ca6a6 JFM |
1991 | /* release the device */ |
1992 | /* (this will call gspca_release() immediatly or on last close) */ | |
1993 | video_unregister_device(&gspca_dev->vdev); | |
3145b8c1 | 1994 | |
63eb9546 JFM |
1995 | PDEBUG(D_PROBE, "disconnect complete"); |
1996 | } | |
1997 | EXPORT_SYMBOL(gspca_disconnect); | |
1998 | ||
6a709749 JFM |
1999 | #ifdef CONFIG_PM |
2000 | int gspca_suspend(struct usb_interface *intf, pm_message_t message) | |
2001 | { | |
2002 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
2003 | ||
2004 | if (!gspca_dev->streaming) | |
2005 | return 0; | |
2006 | gspca_dev->frozen = 1; /* avoid urb error messages */ | |
012d6b02 JFM |
2007 | if (gspca_dev->sd_desc->stopN) |
2008 | gspca_dev->sd_desc->stopN(gspca_dev); | |
6a709749 JFM |
2009 | destroy_urbs(gspca_dev); |
2010 | gspca_set_alt0(gspca_dev); | |
012d6b02 JFM |
2011 | if (gspca_dev->sd_desc->stop0) |
2012 | gspca_dev->sd_desc->stop0(gspca_dev); | |
6a709749 JFM |
2013 | return 0; |
2014 | } | |
2015 | EXPORT_SYMBOL(gspca_suspend); | |
2016 | ||
2017 | int gspca_resume(struct usb_interface *intf) | |
2018 | { | |
2019 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
2020 | ||
2021 | gspca_dev->frozen = 0; | |
012d6b02 JFM |
2022 | gspca_dev->sd_desc->init(gspca_dev); |
2023 | if (gspca_dev->streaming) | |
2024 | return gspca_init_transfer(gspca_dev); | |
1e89e2da | 2025 | return 0; |
6a709749 JFM |
2026 | } |
2027 | EXPORT_SYMBOL(gspca_resume); | |
2028 | #endif | |
dcef3237 HG |
2029 | /* -- cam driver utility functions -- */ |
2030 | ||
2031 | /* auto gain and exposure algorithm based on the knee algorithm described here: | |
2032 | http://ytse.tricolour.net/docs/LowLightOptimization.html | |
2033 | ||
2034 | Returns 0 if no changes were made, 1 if the gain and or exposure settings | |
2035 | where changed. */ | |
2036 | int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum, | |
2037 | int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee) | |
2038 | { | |
2039 | int i, steps, gain, orig_gain, exposure, orig_exposure, autogain; | |
2040 | const struct ctrl *gain_ctrl = NULL; | |
2041 | const struct ctrl *exposure_ctrl = NULL; | |
2042 | const struct ctrl *autogain_ctrl = NULL; | |
2043 | int retval = 0; | |
2044 | ||
2045 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
2046 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN) | |
2047 | gain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2048 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE) | |
2049 | exposure_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2050 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN) | |
2051 | autogain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2052 | } | |
2053 | if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) { | |
2054 | PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called " | |
2055 | "on cam without (auto)gain/exposure"); | |
2056 | return 0; | |
2057 | } | |
2058 | ||
2059 | if (gain_ctrl->get(gspca_dev, &gain) || | |
2060 | exposure_ctrl->get(gspca_dev, &exposure) || | |
2061 | autogain_ctrl->get(gspca_dev, &autogain) || !autogain) | |
2062 | return 0; | |
2063 | ||
2064 | orig_gain = gain; | |
2065 | orig_exposure = exposure; | |
2066 | ||
2067 | /* If we are of a multiple of deadzone, do multiple steps to reach the | |
2068 | desired lumination fast (with the risc of a slight overshoot) */ | |
2069 | steps = abs(desired_avg_lum - avg_lum) / deadzone; | |
2070 | ||
1c44d81d | 2071 | PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d", |
dcef3237 HG |
2072 | avg_lum, desired_avg_lum, steps); |
2073 | ||
2074 | for (i = 0; i < steps; i++) { | |
2075 | if (avg_lum > desired_avg_lum) { | |
2076 | if (gain > gain_knee) | |
2077 | gain--; | |
2078 | else if (exposure > exposure_knee) | |
2079 | exposure--; | |
2080 | else if (gain > gain_ctrl->qctrl.default_value) | |
2081 | gain--; | |
2082 | else if (exposure > exposure_ctrl->qctrl.minimum) | |
2083 | exposure--; | |
2084 | else if (gain > gain_ctrl->qctrl.minimum) | |
2085 | gain--; | |
2086 | else | |
2087 | break; | |
2088 | } else { | |
2089 | if (gain < gain_ctrl->qctrl.default_value) | |
2090 | gain++; | |
2091 | else if (exposure < exposure_knee) | |
2092 | exposure++; | |
2093 | else if (gain < gain_knee) | |
2094 | gain++; | |
2095 | else if (exposure < exposure_ctrl->qctrl.maximum) | |
2096 | exposure++; | |
2097 | else if (gain < gain_ctrl->qctrl.maximum) | |
2098 | gain++; | |
2099 | else | |
2100 | break; | |
2101 | } | |
2102 | } | |
2103 | ||
2104 | if (gain != orig_gain) { | |
2105 | gain_ctrl->set(gspca_dev, gain); | |
2106 | retval = 1; | |
2107 | } | |
2108 | if (exposure != orig_exposure) { | |
2109 | exposure_ctrl->set(gspca_dev, exposure); | |
2110 | retval = 1; | |
2111 | } | |
2112 | ||
2113 | return retval; | |
2114 | } | |
2115 | EXPORT_SYMBOL(gspca_auto_gain_n_exposure); | |
2116 | ||
63eb9546 JFM |
2117 | /* -- module insert / remove -- */ |
2118 | static int __init gspca_init(void) | |
2119 | { | |
bb64e86c JFM |
2120 | info("main v%d.%d.%d registered", |
2121 | (DRIVER_VERSION_NUMBER >> 16) & 0xff, | |
2122 | (DRIVER_VERSION_NUMBER >> 8) & 0xff, | |
2123 | DRIVER_VERSION_NUMBER & 0xff); | |
63eb9546 JFM |
2124 | return 0; |
2125 | } | |
2126 | static void __exit gspca_exit(void) | |
2127 | { | |
2128 | info("main deregistered"); | |
2129 | } | |
2130 | ||
2131 | module_init(gspca_init); | |
2132 | module_exit(gspca_exit); | |
2133 | ||
335b3f88 | 2134 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
2135 | module_param_named(debug, gspca_debug, int, 0644); |
2136 | MODULE_PARM_DESC(debug, | |
2137 | "Debug (bit) 0x01:error 0x02:probe 0x04:config" | |
d43fa32f JFM |
2138 | " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout" |
2139 | " 0x0100: v4l2"); | |
6a7eba24 | 2140 | #endif |