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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> | |
24 | #include <linux/fs.h> | |
25 | #include <linux/vmalloc.h> | |
26 | #include <linux/sched.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/string.h> | |
30 | #include <linux/pagemap.h> | |
956e42d2 | 31 | #include <linux/io.h> |
63eb9546 | 32 | #include <asm/page.h> |
956e42d2 | 33 | #include <linux/uaccess.h> |
63eb9546 | 34 | #include <linux/jiffies.h> |
35ea11ff | 35 | #include <media/v4l2-ioctl.h> |
63eb9546 JFM |
36 | |
37 | #include "gspca.h" | |
38 | ||
d43fa32f | 39 | /* global values */ |
ac0d6df6 | 40 | #define DEF_NURBS 2 /* default number of URBs */ |
d43fa32f | 41 | |
63eb9546 JFM |
42 | MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>"); |
43 | MODULE_DESCRIPTION("GSPCA USB Camera Driver"); | |
44 | MODULE_LICENSE("GPL"); | |
45 | ||
3371bcc3 | 46 | #define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 3, 0) |
63eb9546 JFM |
47 | |
48 | static int video_nr = -1; | |
49 | ||
335b3f88 | 50 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
51 | int gspca_debug = D_ERR | D_PROBE; |
52 | EXPORT_SYMBOL(gspca_debug); | |
53 | ||
54 | static void PDEBUG_MODE(char *txt, __u32 pixfmt, int w, int h) | |
55 | { | |
56 | if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') { | |
57 | PDEBUG(D_CONF|D_STREAM, "%s %c%c%c%c %dx%d", | |
58 | txt, | |
59 | pixfmt & 0xff, | |
60 | (pixfmt >> 8) & 0xff, | |
61 | (pixfmt >> 16) & 0xff, | |
62 | pixfmt >> 24, | |
63 | w, h); | |
64 | } else { | |
65 | PDEBUG(D_CONF|D_STREAM, "%s 0x%08x %dx%d", | |
66 | txt, | |
67 | pixfmt, | |
68 | w, h); | |
69 | } | |
70 | } | |
71 | #else | |
72 | #define PDEBUG_MODE(txt, pixfmt, w, h) | |
73 | #endif | |
74 | ||
d43fa32f JFM |
75 | /* specific memory types - !! should different from V4L2_MEMORY_xxx */ |
76 | #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */ | |
77 | #define GSPCA_MEMORY_READ 7 | |
78 | ||
d43fa32f | 79 | #define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE) |
d43fa32f | 80 | |
63eb9546 JFM |
81 | /* |
82 | * VMA operations. | |
83 | */ | |
84 | static void gspca_vm_open(struct vm_area_struct *vma) | |
85 | { | |
86 | struct gspca_frame *frame = vma->vm_private_data; | |
87 | ||
88 | frame->vma_use_count++; | |
89 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED; | |
90 | } | |
91 | ||
92 | static void gspca_vm_close(struct vm_area_struct *vma) | |
93 | { | |
94 | struct gspca_frame *frame = vma->vm_private_data; | |
95 | ||
96 | if (--frame->vma_use_count <= 0) | |
97 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED; | |
98 | } | |
99 | ||
100 | static struct vm_operations_struct gspca_vm_ops = { | |
101 | .open = gspca_vm_open, | |
102 | .close = gspca_vm_close, | |
103 | }; | |
104 | ||
1b60e1ad JFM |
105 | /* get the current input frame buffer */ |
106 | struct gspca_frame *gspca_get_i_frame(struct gspca_dev *gspca_dev) | |
107 | { | |
108 | struct gspca_frame *frame; | |
109 | int i; | |
110 | ||
111 | i = gspca_dev->fr_i; | |
112 | i = gspca_dev->fr_queue[i]; | |
113 | frame = &gspca_dev->frame[i]; | |
114 | if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS) | |
115 | != V4L2_BUF_FLAG_QUEUED) | |
116 | return NULL; | |
117 | return frame; | |
118 | } | |
119 | EXPORT_SYMBOL(gspca_get_i_frame); | |
120 | ||
63eb9546 | 121 | /* |
d43fa32f | 122 | * fill a video frame from an URB and resubmit |
63eb9546 | 123 | */ |
d43fa32f JFM |
124 | static void fill_frame(struct gspca_dev *gspca_dev, |
125 | struct urb *urb) | |
63eb9546 | 126 | { |
63eb9546 | 127 | struct gspca_frame *frame; |
6a7eba24 | 128 | __u8 *data; /* address of data in the iso message */ |
1b60e1ad | 129 | int i, len, st; |
63eb9546 JFM |
130 | cam_pkt_op pkt_scan; |
131 | ||
6a7eba24 | 132 | if (urb->status != 0) { |
62ee8eee | 133 | #ifdef CONFIG_PM |
6a709749 | 134 | if (!gspca_dev->frozen) |
62ee8eee | 135 | #endif |
6a709749 | 136 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); |
6a7eba24 JFM |
137 | return; /* disconnection ? */ |
138 | } | |
63eb9546 JFM |
139 | pkt_scan = gspca_dev->sd_desc->pkt_scan; |
140 | for (i = 0; i < urb->number_of_packets; i++) { | |
141 | ||
142 | /* check the availability of the frame buffer */ | |
1b60e1ad JFM |
143 | frame = gspca_get_i_frame(gspca_dev); |
144 | if (!frame) { | |
63eb9546 JFM |
145 | gspca_dev->last_packet_type = DISCARD_PACKET; |
146 | break; | |
147 | } | |
148 | ||
149 | /* check the packet status and length */ | |
150 | len = urb->iso_frame_desc[i].actual_length; | |
6a7eba24 JFM |
151 | if (len == 0) |
152 | continue; | |
63eb9546 JFM |
153 | st = urb->iso_frame_desc[i].status; |
154 | if (st) { | |
6a7eba24 JFM |
155 | PDEBUG(D_ERR, |
156 | "ISOC data error: [%d] len=%d, status=%d", | |
63eb9546 JFM |
157 | i, len, st); |
158 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
159 | continue; | |
160 | } | |
63eb9546 JFM |
161 | |
162 | /* let the packet be analyzed by the subdriver */ | |
163 | PDEBUG(D_PACK, "packet [%d] o:%d l:%d", | |
164 | i, urb->iso_frame_desc[i].offset, len); | |
6a7eba24 | 165 | data = (__u8 *) urb->transfer_buffer |
63eb9546 JFM |
166 | + urb->iso_frame_desc[i].offset; |
167 | pkt_scan(gspca_dev, frame, data, len); | |
168 | } | |
169 | ||
170 | /* resubmit the URB */ | |
171 | urb->status = 0; | |
172 | st = usb_submit_urb(urb, GFP_ATOMIC); | |
173 | if (st < 0) | |
174 | PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st); | |
175 | } | |
176 | ||
d43fa32f JFM |
177 | /* |
178 | * ISOC message interrupt from the USB device | |
179 | * | |
ac0d6df6 | 180 | * Analyse each packet and call the subdriver for copy to the frame buffer. |
d43fa32f | 181 | */ |
ac0d6df6 | 182 | static void isoc_irq(struct urb *urb |
6a7eba24 | 183 | ) |
d43fa32f JFM |
184 | { |
185 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
186 | ||
3647fea8 | 187 | PDEBUG(D_PACK, "isoc irq"); |
d43fa32f JFM |
188 | if (!gspca_dev->streaming) |
189 | return; | |
190 | fill_frame(gspca_dev, urb); | |
191 | } | |
192 | ||
0be01004 JFM |
193 | /* |
194 | * bulk message interrupt from the USB device | |
195 | */ | |
196 | static void bulk_irq(struct urb *urb | |
197 | ) | |
198 | { | |
199 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
200 | struct gspca_frame *frame; | |
0be01004 JFM |
201 | |
202 | PDEBUG(D_PACK, "bulk irq"); | |
203 | if (!gspca_dev->streaming) | |
204 | return; | |
205 | if (urb->status != 0 && urb->status != -ECONNRESET) { | |
206 | #ifdef CONFIG_PM | |
207 | if (!gspca_dev->frozen) | |
208 | #endif | |
209 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); | |
210 | return; /* disconnection ? */ | |
211 | } | |
212 | ||
213 | /* check the availability of the frame buffer */ | |
1b60e1ad JFM |
214 | frame = gspca_get_i_frame(gspca_dev); |
215 | if (!frame) { | |
0be01004 JFM |
216 | gspca_dev->last_packet_type = DISCARD_PACKET; |
217 | } else { | |
218 | PDEBUG(D_PACK, "packet l:%d", urb->actual_length); | |
219 | gspca_dev->sd_desc->pkt_scan(gspca_dev, | |
220 | frame, | |
221 | urb->transfer_buffer, | |
222 | urb->actual_length); | |
223 | } | |
0be01004 JFM |
224 | } |
225 | ||
63eb9546 JFM |
226 | /* |
227 | * add data to the current frame | |
228 | * | |
ac0d6df6 JFM |
229 | * This function is called by the subdrivers at interrupt level. |
230 | * | |
63eb9546 JFM |
231 | * To build a frame, these ones must add |
232 | * - one FIRST_PACKET | |
233 | * - 0 or many INTER_PACKETs | |
234 | * - one LAST_PACKET | |
235 | * DISCARD_PACKET invalidates the whole frame. | |
236 | * On LAST_PACKET, a new frame is returned. | |
237 | */ | |
238 | struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev, | |
239 | int packet_type, | |
240 | struct gspca_frame *frame, | |
a5ae2062 | 241 | const __u8 *data, |
63eb9546 JFM |
242 | int len) |
243 | { | |
244 | int i, j; | |
245 | ||
e2997a72 | 246 | PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len); |
63eb9546 JFM |
247 | |
248 | /* when start of a new frame, if the current frame buffer | |
249 | * is not queued, discard the whole frame */ | |
250 | if (packet_type == FIRST_PACKET) { | |
d43fa32f JFM |
251 | if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS) |
252 | != V4L2_BUF_FLAG_QUEUED) { | |
63eb9546 JFM |
253 | gspca_dev->last_packet_type = DISCARD_PACKET; |
254 | return frame; | |
255 | } | |
256 | frame->data_end = frame->data; | |
257 | jiffies_to_timeval(get_jiffies_64(), | |
258 | &frame->v4l2_buf.timestamp); | |
259 | frame->v4l2_buf.sequence = ++gspca_dev->sequence; | |
d43fa32f | 260 | } else if (gspca_dev->last_packet_type == DISCARD_PACKET) { |
06ca78fa JFM |
261 | if (packet_type == LAST_PACKET) |
262 | gspca_dev->last_packet_type = packet_type; | |
63eb9546 | 263 | return frame; |
d43fa32f | 264 | } |
63eb9546 | 265 | |
d43fa32f | 266 | /* append the packet to the frame buffer */ |
63eb9546 JFM |
267 | if (len > 0) { |
268 | if (frame->data_end - frame->data + len | |
269 | > frame->v4l2_buf.length) { | |
a9e11134 | 270 | PDEBUG(D_ERR|D_PACK, "frame overflow %zd > %d", |
63eb9546 JFM |
271 | frame->data_end - frame->data + len, |
272 | frame->v4l2_buf.length); | |
273 | packet_type = DISCARD_PACKET; | |
274 | } else { | |
ac0d6df6 | 275 | memcpy(frame->data_end, data, len); |
63eb9546 JFM |
276 | frame->data_end += len; |
277 | } | |
278 | } | |
279 | gspca_dev->last_packet_type = packet_type; | |
280 | ||
281 | /* if last packet, wake the application and advance in the queue */ | |
282 | if (packet_type == LAST_PACKET) { | |
283 | frame->v4l2_buf.bytesused = frame->data_end - frame->data; | |
284 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_QUEUED; | |
285 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_DONE; | |
286 | atomic_inc(&gspca_dev->nevent); | |
287 | wake_up_interruptible(&gspca_dev->wq); /* event = new frame */ | |
d43fa32f JFM |
288 | i = (gspca_dev->fr_i + 1) % gspca_dev->nframes; |
289 | gspca_dev->fr_i = i; | |
63eb9546 JFM |
290 | PDEBUG(D_FRAM, "frame complete len:%d q:%d i:%d o:%d", |
291 | frame->v4l2_buf.bytesused, | |
292 | gspca_dev->fr_q, | |
293 | i, | |
294 | gspca_dev->fr_o); | |
295 | j = gspca_dev->fr_queue[i]; | |
296 | frame = &gspca_dev->frame[j]; | |
63eb9546 JFM |
297 | } |
298 | return frame; | |
299 | } | |
300 | EXPORT_SYMBOL(gspca_frame_add); | |
301 | ||
302 | static int gspca_is_compressed(__u32 format) | |
303 | { | |
304 | switch (format) { | |
305 | case V4L2_PIX_FMT_MJPEG: | |
306 | case V4L2_PIX_FMT_JPEG: | |
50a871fe | 307 | case V4L2_PIX_FMT_SPCA561: |
ab8f12cf | 308 | case V4L2_PIX_FMT_PAC207: |
63eb9546 JFM |
309 | return 1; |
310 | } | |
311 | return 0; | |
312 | } | |
313 | ||
314 | static void *rvmalloc(unsigned long size) | |
315 | { | |
316 | void *mem; | |
317 | unsigned long adr; | |
318 | ||
d43fa32f | 319 | /* size = PAGE_ALIGN(size); (already done) */ |
63eb9546 | 320 | mem = vmalloc_32(size); |
efab8211 | 321 | if (mem != NULL) { |
63eb9546 JFM |
322 | adr = (unsigned long) mem; |
323 | while ((long) size > 0) { | |
324 | SetPageReserved(vmalloc_to_page((void *) adr)); | |
325 | adr += PAGE_SIZE; | |
326 | size -= PAGE_SIZE; | |
327 | } | |
328 | } | |
329 | return mem; | |
330 | } | |
331 | ||
ac0d6df6 | 332 | static void rvfree(void *mem, long size) |
63eb9546 JFM |
333 | { |
334 | unsigned long adr; | |
335 | ||
63eb9546 | 336 | adr = (unsigned long) mem; |
ac0d6df6 | 337 | while (size > 0) { |
63eb9546 JFM |
338 | ClearPageReserved(vmalloc_to_page((void *) adr)); |
339 | adr += PAGE_SIZE; | |
340 | size -= PAGE_SIZE; | |
341 | } | |
342 | vfree(mem); | |
343 | } | |
344 | ||
345 | static int frame_alloc(struct gspca_dev *gspca_dev, | |
d43fa32f | 346 | unsigned int count) |
63eb9546 | 347 | { |
d43fa32f JFM |
348 | struct gspca_frame *frame; |
349 | unsigned int frsz; | |
350 | int i; | |
63eb9546 | 351 | |
c2446b3e JFM |
352 | i = gspca_dev->curr_mode; |
353 | frsz = gspca_dev->cam.cam_mode[i].sizeimage; | |
63eb9546 | 354 | PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz); |
63eb9546 | 355 | frsz = PAGE_ALIGN(frsz); |
63eb9546 | 356 | gspca_dev->frsz = frsz; |
c2446b3e JFM |
357 | if (count > GSPCA_MAX_FRAMES) |
358 | count = GSPCA_MAX_FRAMES; | |
ac0d6df6 JFM |
359 | gspca_dev->frbuf = rvmalloc(frsz * count); |
360 | if (!gspca_dev->frbuf) { | |
361 | err("frame alloc failed"); | |
362 | return -ENOMEM; | |
63eb9546 JFM |
363 | } |
364 | gspca_dev->nframes = count; | |
365 | for (i = 0; i < count; i++) { | |
d43fa32f JFM |
366 | frame = &gspca_dev->frame[i]; |
367 | frame->v4l2_buf.index = i; | |
368 | frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
369 | frame->v4l2_buf.flags = 0; | |
370 | frame->v4l2_buf.field = V4L2_FIELD_NONE; | |
371 | frame->v4l2_buf.length = frsz; | |
372 | frame->v4l2_buf.memory = gspca_dev->memory; | |
373 | frame->v4l2_buf.sequence = 0; | |
ac0d6df6 | 374 | frame->data = frame->data_end = |
d43fa32f | 375 | gspca_dev->frbuf + i * frsz; |
ac0d6df6 | 376 | frame->v4l2_buf.m.offset = i * frsz; |
63eb9546 JFM |
377 | } |
378 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
379 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
380 | gspca_dev->sequence = 0; | |
381 | atomic_set(&gspca_dev->nevent, 0); | |
d43fa32f | 382 | return 0; |
63eb9546 JFM |
383 | } |
384 | ||
385 | static void frame_free(struct gspca_dev *gspca_dev) | |
386 | { | |
387 | int i; | |
388 | ||
389 | PDEBUG(D_STREAM, "frame free"); | |
efab8211 | 390 | if (gspca_dev->frbuf != NULL) { |
63eb9546 JFM |
391 | rvfree(gspca_dev->frbuf, |
392 | gspca_dev->nframes * gspca_dev->frsz); | |
393 | gspca_dev->frbuf = NULL; | |
394 | for (i = 0; i < gspca_dev->nframes; i++) | |
395 | gspca_dev->frame[i].data = NULL; | |
396 | } | |
397 | gspca_dev->nframes = 0; | |
398 | } | |
399 | ||
d43fa32f | 400 | static void destroy_urbs(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
401 | { |
402 | struct urb *urb; | |
403 | unsigned int i; | |
404 | ||
405 | PDEBUG(D_STREAM, "kill transfer"); | |
d43fa32f | 406 | for (i = 0; i < MAX_NURBS; ++i) { |
4aa0d037 | 407 | urb = gspca_dev->urb[i]; |
63eb9546 | 408 | if (urb == NULL) |
d43fa32f | 409 | break; |
63eb9546 | 410 | |
4aa0d037 | 411 | gspca_dev->urb[i] = NULL; |
63eb9546 | 412 | usb_kill_urb(urb); |
efab8211 | 413 | if (urb->transfer_buffer != NULL) |
63eb9546 JFM |
414 | usb_buffer_free(gspca_dev->dev, |
415 | urb->transfer_buffer_length, | |
4aa0d037 | 416 | urb->transfer_buffer, |
63eb9546 | 417 | urb->transfer_dma); |
63eb9546 JFM |
418 | usb_free_urb(urb); |
419 | } | |
63eb9546 JFM |
420 | } |
421 | ||
422 | /* | |
0be01004 | 423 | * search an input transfer endpoint in an alternate setting |
63eb9546 | 424 | */ |
0be01004 JFM |
425 | static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, |
426 | __u8 epaddr, | |
427 | __u8 xfer) | |
63eb9546 JFM |
428 | { |
429 | struct usb_host_endpoint *ep; | |
430 | int i, attr; | |
431 | ||
432 | epaddr |= USB_DIR_IN; | |
433 | for (i = 0; i < alt->desc.bNumEndpoints; i++) { | |
434 | ep = &alt->endpoint[i]; | |
435 | if (ep->desc.bEndpointAddress == epaddr) { | |
436 | attr = ep->desc.bmAttributes | |
437 | & USB_ENDPOINT_XFERTYPE_MASK; | |
0be01004 | 438 | if (attr == xfer) |
63eb9546 JFM |
439 | return ep; |
440 | break; | |
441 | } | |
442 | } | |
443 | return NULL; | |
444 | } | |
445 | ||
446 | /* | |
0be01004 | 447 | * search an input (isoc or bulk) endpoint |
63eb9546 JFM |
448 | * |
449 | * The endpoint is defined by the subdriver. | |
450 | * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep). | |
451 | * This routine may be called many times when the bandwidth is too small | |
452 | * (the bandwidth is checked on urb submit). | |
453 | */ | |
0be01004 | 454 | static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
455 | { |
456 | struct usb_interface *intf; | |
457 | struct usb_host_endpoint *ep; | |
458 | int i, ret; | |
459 | ||
460 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
6a7eba24 | 461 | ep = NULL; |
63eb9546 JFM |
462 | i = gspca_dev->alt; /* previous alt setting */ |
463 | while (--i > 0) { /* alt 0 is unusable */ | |
0be01004 JFM |
464 | ep = alt_xfer(&intf->altsetting[i], |
465 | gspca_dev->cam.epaddr, | |
466 | gspca_dev->bulk | |
467 | ? USB_ENDPOINT_XFER_BULK | |
468 | : USB_ENDPOINT_XFER_ISOC); | |
63eb9546 JFM |
469 | if (ep) |
470 | break; | |
471 | } | |
6a7eba24 | 472 | if (ep == NULL) { |
0be01004 | 473 | err("no transfer endpoint found"); |
63eb9546 JFM |
474 | return NULL; |
475 | } | |
0be01004 | 476 | PDEBUG(D_STREAM, "use alt %d ep 0x%02x", |
63eb9546 JFM |
477 | i, ep->desc.bEndpointAddress); |
478 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i); | |
479 | if (ret < 0) { | |
480 | err("set interface err %d", ret); | |
481 | return NULL; | |
482 | } | |
d43fa32f | 483 | gspca_dev->alt = i; /* memorize the current alt setting */ |
63eb9546 JFM |
484 | return ep; |
485 | } | |
486 | ||
487 | /* | |
0be01004 | 488 | * create the URBs for image transfer |
63eb9546 JFM |
489 | */ |
490 | static int create_urbs(struct gspca_dev *gspca_dev, | |
491 | struct usb_host_endpoint *ep) | |
492 | { | |
493 | struct urb *urb; | |
d43fa32f | 494 | int n, nurbs, i, psize, npkt, bsize; |
63eb9546 JFM |
495 | |
496 | /* calculate the packet size and the number of packets */ | |
63eb9546 | 497 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
d43fa32f | 498 | |
63eb9546 JFM |
499 | /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ |
500 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); | |
0be01004 JFM |
501 | if (!gspca_dev->bulk) { |
502 | npkt = ISO_MAX_SIZE / psize; | |
503 | if (npkt > ISO_MAX_PKT) | |
504 | npkt = ISO_MAX_PKT; | |
505 | bsize = psize * npkt; | |
506 | PDEBUG(D_STREAM, | |
507 | "isoc %d pkts size %d = bsize:%d", | |
508 | npkt, psize, bsize); | |
51977a8d | 509 | nurbs = DEF_NURBS; |
0be01004 JFM |
510 | } else { |
511 | npkt = 0; | |
512 | bsize = psize; | |
513 | PDEBUG(D_STREAM, "bulk bsize:%d", bsize); | |
51977a8d | 514 | nurbs = 1; |
0be01004 JFM |
515 | } |
516 | ||
6a7eba24 | 517 | gspca_dev->nurbs = nurbs; |
d43fa32f | 518 | for (n = 0; n < nurbs; n++) { |
63eb9546 JFM |
519 | urb = usb_alloc_urb(npkt, GFP_KERNEL); |
520 | if (!urb) { | |
521 | err("usb_alloc_urb failed"); | |
0d0548e6 | 522 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
523 | return -ENOMEM; |
524 | } | |
4aa0d037 | 525 | urb->transfer_buffer = usb_buffer_alloc(gspca_dev->dev, |
63eb9546 JFM |
526 | bsize, |
527 | GFP_KERNEL, | |
528 | &urb->transfer_dma); | |
529 | ||
4aa0d037 | 530 | if (urb->transfer_buffer == NULL) { |
63eb9546 | 531 | usb_free_urb(urb); |
63eb9546 | 532 | err("usb_buffer_urb failed"); |
0d0548e6 | 533 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
534 | return -ENOMEM; |
535 | } | |
4aa0d037 | 536 | gspca_dev->urb[n] = urb; |
63eb9546 JFM |
537 | urb->dev = gspca_dev->dev; |
538 | urb->context = gspca_dev; | |
63eb9546 | 539 | urb->transfer_buffer_length = bsize; |
0be01004 JFM |
540 | if (npkt != 0) { /* ISOC */ |
541 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, | |
542 | ep->desc.bEndpointAddress); | |
3b11fa3a | 543 | urb->transfer_flags = URB_ISO_ASAP; |
0be01004 JFM |
544 | urb->interval = ep->desc.bInterval; |
545 | urb->complete = isoc_irq; | |
546 | urb->number_of_packets = npkt; | |
547 | for (i = 0; i < npkt; i++) { | |
548 | urb->iso_frame_desc[i].length = psize; | |
549 | urb->iso_frame_desc[i].offset = psize * i; | |
550 | } | |
551 | } else { /* bulk */ | |
552 | urb->pipe = usb_rcvbulkpipe(gspca_dev->dev, | |
553 | ep->desc.bEndpointAddress), | |
554 | urb->complete = bulk_irq; | |
63eb9546 JFM |
555 | } |
556 | } | |
557 | return 0; | |
558 | } | |
559 | ||
560 | /* | |
561 | * start the USB transfer | |
562 | */ | |
563 | static int gspca_init_transfer(struct gspca_dev *gspca_dev) | |
564 | { | |
63eb9546 JFM |
565 | struct usb_host_endpoint *ep; |
566 | int n, ret; | |
567 | ||
e2997a72 HG |
568 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
569 | return -ERESTARTSYS; | |
63eb9546 | 570 | |
d43fa32f JFM |
571 | /* set the higher alternate setting and |
572 | * loop until urb submit succeeds */ | |
573 | gspca_dev->alt = gspca_dev->nbalt; | |
63eb9546 | 574 | for (;;) { |
d43fa32f | 575 | PDEBUG(D_STREAM, "init transfer alt %d", gspca_dev->alt); |
0be01004 | 576 | ep = get_ep(gspca_dev); |
63eb9546 JFM |
577 | if (ep == NULL) { |
578 | ret = -EIO; | |
579 | goto out; | |
580 | } | |
581 | ret = create_urbs(gspca_dev, ep); | |
582 | if (ret < 0) | |
583 | goto out; | |
584 | ||
585 | /* start the cam */ | |
72ab97ce JFM |
586 | ret = gspca_dev->sd_desc->start(gspca_dev); |
587 | if (ret < 0) { | |
588 | destroy_urbs(gspca_dev); | |
589 | goto out; | |
590 | } | |
63eb9546 JFM |
591 | gspca_dev->streaming = 1; |
592 | atomic_set(&gspca_dev->nevent, 0); | |
593 | ||
51977a8d JFM |
594 | /* start the bulk transfer is done by the subdriver */ |
595 | if (gspca_dev->bulk) | |
596 | break; | |
597 | ||
63eb9546 | 598 | /* submit the URBs */ |
d43fa32f | 599 | for (n = 0; n < gspca_dev->nurbs; n++) { |
4aa0d037 | 600 | ret = usb_submit_urb(gspca_dev->urb[n], GFP_KERNEL); |
63eb9546 JFM |
601 | if (ret < 0) { |
602 | PDEBUG(D_ERR|D_STREAM, | |
603 | "usb_submit_urb [%d] err %d", n, ret); | |
e2997a72 | 604 | gspca_dev->streaming = 0; |
d43fa32f | 605 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
606 | if (ret == -ENOSPC) |
607 | break; /* try the previous alt */ | |
608 | goto out; | |
609 | } | |
610 | } | |
611 | if (ret >= 0) | |
612 | break; | |
613 | } | |
614 | out: | |
615 | mutex_unlock(&gspca_dev->usb_lock); | |
616 | return ret; | |
617 | } | |
618 | ||
619 | static int gspca_set_alt0(struct gspca_dev *gspca_dev) | |
620 | { | |
621 | int ret; | |
622 | ||
623 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0); | |
624 | if (ret < 0) | |
625 | PDEBUG(D_ERR|D_STREAM, "set interface 0 err %d", ret); | |
626 | return ret; | |
627 | } | |
628 | ||
e2997a72 | 629 | /* Note both the queue and the usb lock should be hold when calling this */ |
63eb9546 JFM |
630 | static void gspca_stream_off(struct gspca_dev *gspca_dev) |
631 | { | |
63eb9546 | 632 | gspca_dev->streaming = 0; |
d43fa32f | 633 | atomic_set(&gspca_dev->nevent, 0); |
63eb9546 | 634 | if (gspca_dev->present) { |
012d6b02 JFM |
635 | if (gspca_dev->sd_desc->stopN) |
636 | gspca_dev->sd_desc->stopN(gspca_dev); | |
d43fa32f | 637 | destroy_urbs(gspca_dev); |
63eb9546 | 638 | gspca_set_alt0(gspca_dev); |
012d6b02 JFM |
639 | if (gspca_dev->sd_desc->stop0) |
640 | gspca_dev->sd_desc->stop0(gspca_dev); | |
63eb9546 | 641 | PDEBUG(D_STREAM, "stream off OK"); |
63eb9546 | 642 | } |
63eb9546 JFM |
643 | } |
644 | ||
d43fa32f | 645 | static void gspca_set_default_mode(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
646 | { |
647 | int i; | |
648 | ||
649 | i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ | |
650 | gspca_dev->curr_mode = i; | |
651 | gspca_dev->width = gspca_dev->cam.cam_mode[i].width; | |
652 | gspca_dev->height = gspca_dev->cam.cam_mode[i].height; | |
c2446b3e | 653 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
654 | } |
655 | ||
656 | static int wxh_to_mode(struct gspca_dev *gspca_dev, | |
657 | int width, int height) | |
658 | { | |
659 | int i; | |
660 | ||
d43fa32f JFM |
661 | for (i = gspca_dev->cam.nmodes; --i > 0; ) { |
662 | if (width >= gspca_dev->cam.cam_mode[i].width | |
663 | && height >= gspca_dev->cam.cam_mode[i].height) | |
63eb9546 JFM |
664 | break; |
665 | } | |
63eb9546 JFM |
666 | return i; |
667 | } | |
668 | ||
63eb9546 JFM |
669 | /* |
670 | * search a mode with the right pixel format | |
671 | */ | |
672 | static int gspca_get_mode(struct gspca_dev *gspca_dev, | |
673 | int mode, | |
674 | int pixfmt) | |
675 | { | |
676 | int modeU, modeD; | |
677 | ||
678 | modeU = modeD = mode; | |
679 | while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { | |
680 | if (--modeD >= 0) { | |
c2446b3e JFM |
681 | if (gspca_dev->cam.cam_mode[modeD].pixelformat |
682 | == pixfmt) | |
63eb9546 JFM |
683 | return modeD; |
684 | } | |
685 | if (++modeU < gspca_dev->cam.nmodes) { | |
c2446b3e JFM |
686 | if (gspca_dev->cam.cam_mode[modeU].pixelformat |
687 | == pixfmt) | |
63eb9546 JFM |
688 | return modeU; |
689 | } | |
690 | } | |
691 | return -EINVAL; | |
692 | } | |
693 | ||
e078770a | 694 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
695 | struct v4l2_fmtdesc *fmtdesc) |
696 | { | |
697 | struct gspca_dev *gspca_dev = priv; | |
6a7eba24 | 698 | int i, j, index; |
63eb9546 JFM |
699 | __u32 fmt_tb[8]; |
700 | ||
63eb9546 JFM |
701 | /* give an index to each format */ |
702 | index = 0; | |
703 | j = 0; | |
704 | for (i = gspca_dev->cam.nmodes; --i >= 0; ) { | |
c2446b3e | 705 | fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
706 | j = 0; |
707 | for (;;) { | |
708 | if (fmt_tb[j] == fmt_tb[index]) | |
709 | break; | |
710 | j++; | |
711 | } | |
712 | if (j == index) { | |
713 | if (fmtdesc->index == index) | |
714 | break; /* new format */ | |
715 | index++; | |
716 | if (index >= sizeof fmt_tb / sizeof fmt_tb[0]) | |
717 | return -EINVAL; | |
718 | } | |
719 | } | |
720 | if (i < 0) | |
721 | return -EINVAL; /* no more format */ | |
722 | ||
63eb9546 JFM |
723 | fmtdesc->pixelformat = fmt_tb[index]; |
724 | if (gspca_is_compressed(fmt_tb[index])) | |
725 | fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; | |
d43fa32f | 726 | fmtdesc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
63eb9546 JFM |
727 | fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; |
728 | fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; | |
729 | fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; | |
730 | fmtdesc->description[3] = fmtdesc->pixelformat >> 24; | |
731 | fmtdesc->description[4] = '\0'; | |
732 | return 0; | |
733 | } | |
734 | ||
e078770a | 735 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
736 | struct v4l2_format *fmt) |
737 | { | |
738 | struct gspca_dev *gspca_dev = priv; | |
c2446b3e | 739 | int mode; |
63eb9546 | 740 | |
6a7eba24 JFM |
741 | if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
742 | return -EINVAL; | |
c2446b3e JFM |
743 | mode = gspca_dev->curr_mode; |
744 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], | |
745 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
746 | return 0; |
747 | } | |
748 | ||
e078770a | 749 | static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
750 | struct v4l2_format *fmt) |
751 | { | |
24c530b4 | 752 | int w, h, mode, mode2; |
63eb9546 | 753 | |
6a7eba24 JFM |
754 | if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
755 | return -EINVAL; | |
4aa0d037 JFM |
756 | w = fmt->fmt.pix.width; |
757 | h = fmt->fmt.pix.height; | |
d43fa32f | 758 | |
335b3f88 | 759 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
760 | if (gspca_debug & D_CONF) |
761 | PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h); | |
762 | #endif | |
763 | /* search the closest mode for width and height */ | |
764 | mode = wxh_to_mode(gspca_dev, w, h); | |
765 | ||
766 | /* OK if right palette */ | |
c2446b3e JFM |
767 | if (gspca_dev->cam.cam_mode[mode].pixelformat |
768 | != fmt->fmt.pix.pixelformat) { | |
63eb9546 JFM |
769 | |
770 | /* else, search the closest mode with the same pixel format */ | |
771 | mode2 = gspca_get_mode(gspca_dev, mode, | |
772 | fmt->fmt.pix.pixelformat); | |
c2446b3e | 773 | if (mode2 >= 0) |
63eb9546 | 774 | mode = mode2; |
c2446b3e JFM |
775 | /* else |
776 | ; * no chance, return this mode */ | |
63eb9546 | 777 | } |
c2446b3e JFM |
778 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], |
779 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
780 | return mode; /* used when s_fmt */ |
781 | } | |
782 | ||
e078770a | 783 | static int vidioc_try_fmt_vid_cap(struct file *file, |
63eb9546 JFM |
784 | void *priv, |
785 | struct v4l2_format *fmt) | |
786 | { | |
4aa0d037 | 787 | struct gspca_dev *gspca_dev = priv; |
63eb9546 JFM |
788 | int ret; |
789 | ||
e078770a | 790 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
791 | if (ret < 0) |
792 | return ret; | |
793 | return 0; | |
794 | } | |
795 | ||
e078770a | 796 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
797 | struct v4l2_format *fmt) |
798 | { | |
799 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 800 | int ret; |
63eb9546 | 801 | |
e2997a72 HG |
802 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
803 | return -ERESTARTSYS; | |
d43fa32f | 804 | |
e078770a | 805 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
806 | if (ret < 0) |
807 | goto out; | |
808 | ||
d43fa32f JFM |
809 | if (gspca_dev->nframes != 0 |
810 | && fmt->fmt.pix.sizeimage > gspca_dev->frsz) { | |
811 | ret = -EINVAL; | |
812 | goto out; | |
813 | } | |
814 | ||
50a871fe JFM |
815 | if (ret == gspca_dev->curr_mode) { |
816 | ret = 0; | |
63eb9546 | 817 | goto out; /* same mode */ |
50a871fe | 818 | } |
d43fa32f JFM |
819 | |
820 | if (gspca_dev->streaming) { | |
821 | ret = -EBUSY; | |
822 | goto out; | |
e2997a72 | 823 | } |
4aa0d037 JFM |
824 | gspca_dev->width = fmt->fmt.pix.width; |
825 | gspca_dev->height = fmt->fmt.pix.height; | |
63eb9546 JFM |
826 | gspca_dev->pixfmt = fmt->fmt.pix.pixelformat; |
827 | gspca_dev->curr_mode = ret; | |
d43fa32f | 828 | |
d43fa32f | 829 | ret = 0; |
63eb9546 JFM |
830 | out: |
831 | mutex_unlock(&gspca_dev->queue_lock); | |
832 | return ret; | |
833 | } | |
834 | ||
835 | static int dev_open(struct inode *inode, struct file *file) | |
836 | { | |
837 | struct gspca_dev *gspca_dev; | |
838 | int ret; | |
839 | ||
d43fa32f | 840 | PDEBUG(D_STREAM, "%s open", current->comm); |
63eb9546 | 841 | gspca_dev = (struct gspca_dev *) video_devdata(file); |
e2997a72 HG |
842 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
843 | return -ERESTARTSYS; | |
63eb9546 JFM |
844 | if (!gspca_dev->present) { |
845 | ret = -ENODEV; | |
846 | goto out; | |
847 | } | |
848 | ||
012d6b02 | 849 | if (gspca_dev->users > 4) { /* (arbitrary value) */ |
63eb9546 JFM |
850 | ret = -EBUSY; |
851 | goto out; | |
852 | } | |
853 | gspca_dev->users++; | |
854 | file->private_data = gspca_dev; | |
335b3f88 | 855 | #ifdef GSPCA_DEBUG |
63eb9546 | 856 | /* activate the v4l2 debug */ |
d43fa32f | 857 | if (gspca_debug & D_V4L2) |
9de436cf FZ |
858 | gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL |
859 | | V4L2_DEBUG_IOCTL_ARG; | |
63eb9546 | 860 | else |
9de436cf FZ |
861 | gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL |
862 | | V4L2_DEBUG_IOCTL_ARG); | |
63eb9546 | 863 | #endif |
012d6b02 | 864 | ret = 0; |
63eb9546 JFM |
865 | out: |
866 | mutex_unlock(&gspca_dev->queue_lock); | |
867 | if (ret != 0) | |
868 | PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret); | |
869 | else | |
d43fa32f | 870 | PDEBUG(D_STREAM, "open done"); |
63eb9546 JFM |
871 | return ret; |
872 | } | |
873 | ||
874 | static int dev_close(struct inode *inode, struct file *file) | |
875 | { | |
876 | struct gspca_dev *gspca_dev = file->private_data; | |
877 | ||
d43fa32f | 878 | PDEBUG(D_STREAM, "%s close", current->comm); |
e2997a72 HG |
879 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
880 | return -ERESTARTSYS; | |
881 | gspca_dev->users--; | |
e2997a72 | 882 | |
5b77ae77 | 883 | /* if the file did the capture, free the streaming resources */ |
4aa0d037 | 884 | if (gspca_dev->capt_file == file) { |
a1e8288b JFM |
885 | if (gspca_dev->streaming) { |
886 | mutex_lock(&gspca_dev->usb_lock); | |
887 | gspca_stream_off(gspca_dev); | |
888 | mutex_unlock(&gspca_dev->usb_lock); | |
889 | } | |
4aa0d037 | 890 | frame_free(gspca_dev); |
efab8211 | 891 | gspca_dev->capt_file = NULL; |
d43fa32f | 892 | gspca_dev->memory = GSPCA_MEMORY_NO; |
4aa0d037 | 893 | } |
d43fa32f | 894 | file->private_data = NULL; |
63eb9546 | 895 | mutex_unlock(&gspca_dev->queue_lock); |
d43fa32f | 896 | PDEBUG(D_STREAM, "close done"); |
63eb9546 JFM |
897 | return 0; |
898 | } | |
899 | ||
900 | static int vidioc_querycap(struct file *file, void *priv, | |
901 | struct v4l2_capability *cap) | |
902 | { | |
903 | struct gspca_dev *gspca_dev = priv; | |
904 | ||
63eb9546 JFM |
905 | memset(cap, 0, sizeof *cap); |
906 | strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver); | |
c6edaf16 JFM |
907 | /* strncpy(cap->card, gspca_dev->cam.dev_name, sizeof cap->card); */ |
908 | if (gspca_dev->dev->product != NULL) { | |
909 | strncpy(cap->card, gspca_dev->dev->product, | |
910 | sizeof cap->card); | |
911 | } else { | |
912 | snprintf(cap->card, sizeof cap->card, | |
913 | "USB Camera (%04x:%04x)", | |
914 | le16_to_cpu(gspca_dev->dev->descriptor.idVendor), | |
915 | le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); | |
916 | } | |
63eb9546 JFM |
917 | strncpy(cap->bus_info, gspca_dev->dev->bus->bus_name, |
918 | sizeof cap->bus_info); | |
919 | cap->version = DRIVER_VERSION_NUMBER; | |
920 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | |
921 | | V4L2_CAP_STREAMING | |
922 | | V4L2_CAP_READWRITE; | |
923 | return 0; | |
924 | } | |
925 | ||
926 | static int vidioc_queryctrl(struct file *file, void *priv, | |
927 | struct v4l2_queryctrl *q_ctrl) | |
928 | { | |
929 | struct gspca_dev *gspca_dev = priv; | |
f50ba1be | 930 | int i, ix; |
6a7eba24 JFM |
931 | u32 id; |
932 | ||
f50ba1be | 933 | ix = -1; |
6a7eba24 JFM |
934 | id = q_ctrl->id; |
935 | if (id & V4L2_CTRL_FLAG_NEXT_CTRL) { | |
936 | id &= V4L2_CTRL_ID_MASK; | |
937 | id++; | |
938 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
0f523c2f | 939 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id) |
f50ba1be JFM |
940 | continue; |
941 | if (ix < 0) { | |
942 | ix = i; | |
943 | continue; | |
6a7eba24 | 944 | } |
f50ba1be JFM |
945 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id |
946 | > gspca_dev->sd_desc->ctrls[ix].qctrl.id) | |
947 | continue; | |
948 | ix = i; | |
6a7eba24 | 949 | } |
6a7eba24 | 950 | } |
63eb9546 | 951 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { |
6a7eba24 | 952 | if (id == gspca_dev->sd_desc->ctrls[i].qctrl.id) { |
f50ba1be JFM |
953 | ix = i; |
954 | break; | |
63eb9546 JFM |
955 | } |
956 | } | |
f50ba1be JFM |
957 | if (ix < 0) |
958 | return -EINVAL; | |
959 | memcpy(q_ctrl, &gspca_dev->sd_desc->ctrls[ix].qctrl, | |
960 | sizeof *q_ctrl); | |
961 | if (gspca_dev->ctrl_dis & (1 << ix)) | |
962 | q_ctrl->flags |= V4L2_CTRL_FLAG_DISABLED; | |
963 | return 0; | |
63eb9546 JFM |
964 | } |
965 | ||
966 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
967 | struct v4l2_control *ctrl) | |
968 | { | |
969 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 970 | const struct ctrl *ctrls; |
63eb9546 JFM |
971 | int i, ret; |
972 | ||
63eb9546 JFM |
973 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; |
974 | i < gspca_dev->sd_desc->nctrls; | |
975 | i++, ctrls++) { | |
976 | if (ctrl->id != ctrls->qctrl.id) | |
977 | continue; | |
0f523c2f HG |
978 | if (gspca_dev->ctrl_dis & (1 << i)) |
979 | return -EINVAL; | |
63eb9546 | 980 | if (ctrl->value < ctrls->qctrl.minimum |
fcf5cb24 | 981 | || ctrl->value > ctrls->qctrl.maximum) |
63eb9546 JFM |
982 | return -ERANGE; |
983 | PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value); | |
e2997a72 HG |
984 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
985 | return -ERESTARTSYS; | |
63eb9546 JFM |
986 | ret = ctrls->set(gspca_dev, ctrl->value); |
987 | mutex_unlock(&gspca_dev->usb_lock); | |
988 | return ret; | |
989 | } | |
990 | return -EINVAL; | |
991 | } | |
992 | ||
993 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
994 | struct v4l2_control *ctrl) | |
995 | { | |
996 | struct gspca_dev *gspca_dev = priv; | |
997 | ||
a5ae2062 | 998 | const struct ctrl *ctrls; |
63eb9546 JFM |
999 | int i, ret; |
1000 | ||
1001 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; | |
1002 | i < gspca_dev->sd_desc->nctrls; | |
1003 | i++, ctrls++) { | |
1004 | if (ctrl->id != ctrls->qctrl.id) | |
1005 | continue; | |
0f523c2f HG |
1006 | if (gspca_dev->ctrl_dis & (1 << i)) |
1007 | return -EINVAL; | |
e2997a72 HG |
1008 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1009 | return -ERESTARTSYS; | |
63eb9546 JFM |
1010 | ret = ctrls->get(gspca_dev, &ctrl->value); |
1011 | mutex_unlock(&gspca_dev->usb_lock); | |
1012 | return ret; | |
1013 | } | |
1014 | return -EINVAL; | |
1015 | } | |
1016 | ||
1017 | static int vidioc_querymenu(struct file *file, void *priv, | |
1018 | struct v4l2_querymenu *qmenu) | |
1019 | { | |
1020 | struct gspca_dev *gspca_dev = priv; | |
1021 | ||
1022 | if (!gspca_dev->sd_desc->querymenu) | |
1023 | return -EINVAL; | |
1024 | return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu); | |
1025 | } | |
1026 | ||
1027 | static int vidioc_enum_input(struct file *file, void *priv, | |
1028 | struct v4l2_input *input) | |
1029 | { | |
1030 | struct gspca_dev *gspca_dev = priv; | |
1031 | ||
1032 | if (input->index != 0) | |
1033 | return -EINVAL; | |
1034 | memset(input, 0, sizeof *input); | |
1035 | input->type = V4L2_INPUT_TYPE_CAMERA; | |
1036 | strncpy(input->name, gspca_dev->sd_desc->name, | |
1037 | sizeof input->name); | |
1038 | return 0; | |
1039 | } | |
1040 | ||
1041 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) | |
1042 | { | |
1043 | *i = 0; | |
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) | |
1048 | { | |
1049 | if (i > 0) | |
1050 | return -EINVAL; | |
1051 | return (0); | |
1052 | } | |
1053 | ||
1054 | static int vidioc_reqbufs(struct file *file, void *priv, | |
1055 | struct v4l2_requestbuffers *rb) | |
1056 | { | |
1057 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 1058 | int i, ret = 0; |
63eb9546 | 1059 | |
63eb9546 JFM |
1060 | if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1061 | return -EINVAL; | |
d43fa32f | 1062 | switch (rb->memory) { |
5b77ae77 | 1063 | case GSPCA_MEMORY_READ: /* (internal call) */ |
d43fa32f | 1064 | case V4L2_MEMORY_MMAP: |
d43fa32f | 1065 | case V4L2_MEMORY_USERPTR: |
6a7eba24 | 1066 | break; |
d43fa32f | 1067 | default: |
63eb9546 | 1068 | return -EINVAL; |
d43fa32f | 1069 | } |
e2997a72 HG |
1070 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1071 | return -ERESTARTSYS; | |
d43fa32f | 1072 | |
5b77ae77 JFM |
1073 | if (gspca_dev->memory != GSPCA_MEMORY_NO |
1074 | && gspca_dev->memory != rb->memory) { | |
4aa0d037 JFM |
1075 | ret = -EBUSY; |
1076 | goto out; | |
1077 | } | |
d43fa32f | 1078 | |
5b77ae77 JFM |
1079 | /* only one file may do the capture */ |
1080 | if (gspca_dev->capt_file != NULL | |
1081 | && gspca_dev->capt_file != file) { | |
1082 | ret = -EBUSY; | |
1083 | goto out; | |
1084 | } | |
1085 | ||
1086 | /* if allocated, the buffers must not be mapped */ | |
1087 | for (i = 0; i < gspca_dev->nframes; i++) { | |
1088 | if (gspca_dev->frame[i].vma_use_count) { | |
ac0d6df6 JFM |
1089 | ret = -EBUSY; |
1090 | goto out; | |
1091 | } | |
5b77ae77 JFM |
1092 | } |
1093 | ||
1094 | /* stop streaming */ | |
1095 | if (gspca_dev->streaming) { | |
1096 | mutex_lock(&gspca_dev->usb_lock); | |
1097 | gspca_stream_off(gspca_dev); | |
1098 | mutex_unlock(&gspca_dev->usb_lock); | |
1099 | } | |
1100 | ||
1101 | /* free the previous allocated buffers, if any */ | |
1102 | if (gspca_dev->nframes != 0) { | |
1103 | frame_free(gspca_dev); | |
1104 | gspca_dev->capt_file = NULL; | |
1105 | } | |
1106 | if (rb->count == 0) /* unrequest */ | |
1107 | goto out; | |
1108 | gspca_dev->memory = rb->memory; | |
1109 | ret = frame_alloc(gspca_dev, rb->count); | |
1110 | if (ret == 0) { | |
1111 | rb->count = gspca_dev->nframes; | |
1112 | gspca_dev->capt_file = file; | |
4aa0d037 JFM |
1113 | } |
1114 | out: | |
63eb9546 JFM |
1115 | mutex_unlock(&gspca_dev->queue_lock); |
1116 | PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count); | |
1117 | return ret; | |
1118 | } | |
1119 | ||
1120 | static int vidioc_querybuf(struct file *file, void *priv, | |
1121 | struct v4l2_buffer *v4l2_buf) | |
1122 | { | |
1123 | struct gspca_dev *gspca_dev = priv; | |
1124 | struct gspca_frame *frame; | |
1125 | ||
63eb9546 JFM |
1126 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE |
1127 | || v4l2_buf->index < 0 | |
1128 | || v4l2_buf->index >= gspca_dev->nframes) | |
1129 | return -EINVAL; | |
1130 | ||
1131 | frame = &gspca_dev->frame[v4l2_buf->index]; | |
1132 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1133 | return 0; | |
1134 | } | |
1135 | ||
1136 | static int vidioc_streamon(struct file *file, void *priv, | |
1137 | enum v4l2_buf_type buf_type) | |
1138 | { | |
1139 | struct gspca_dev *gspca_dev = priv; | |
1140 | int ret; | |
1141 | ||
63eb9546 JFM |
1142 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1143 | return -EINVAL; | |
e2997a72 HG |
1144 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1145 | return -ERESTARTSYS; | |
63eb9546 JFM |
1146 | if (!gspca_dev->present) { |
1147 | ret = -ENODEV; | |
1148 | goto out; | |
1149 | } | |
1150 | if (gspca_dev->nframes == 0) { | |
1151 | ret = -EINVAL; | |
1152 | goto out; | |
1153 | } | |
1154 | if (!gspca_dev->streaming) { | |
1155 | ret = gspca_init_transfer(gspca_dev); | |
1156 | if (ret < 0) | |
1157 | goto out; | |
1158 | } | |
335b3f88 | 1159 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
1160 | if (gspca_debug & D_STREAM) { |
1161 | PDEBUG_MODE("stream on OK", | |
1162 | gspca_dev->pixfmt, | |
1163 | gspca_dev->width, | |
1164 | gspca_dev->height); | |
1165 | } | |
1166 | #endif | |
e2997a72 | 1167 | ret = 0; |
63eb9546 JFM |
1168 | out: |
1169 | mutex_unlock(&gspca_dev->queue_lock); | |
1170 | return ret; | |
1171 | } | |
1172 | ||
1173 | static int vidioc_streamoff(struct file *file, void *priv, | |
1174 | enum v4l2_buf_type buf_type) | |
1175 | { | |
1176 | struct gspca_dev *gspca_dev = priv; | |
5b77ae77 | 1177 | int i, ret; |
63eb9546 | 1178 | |
63eb9546 JFM |
1179 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1180 | return -EINVAL; | |
4aa0d037 JFM |
1181 | if (!gspca_dev->streaming) |
1182 | return 0; | |
1183 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1184 | return -ERESTARTSYS; | |
5b77ae77 JFM |
1185 | |
1186 | /* stop streaming */ | |
4aa0d037 JFM |
1187 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { |
1188 | ret = -ERESTARTSYS; | |
1189 | goto out; | |
63eb9546 | 1190 | } |
4aa0d037 | 1191 | gspca_stream_off(gspca_dev); |
4aa0d037 | 1192 | mutex_unlock(&gspca_dev->usb_lock); |
5b77ae77 JFM |
1193 | |
1194 | /* empty the application queues */ | |
1195 | for (i = 0; i < gspca_dev->nframes; i++) | |
1196 | gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS; | |
1197 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
1198 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
1199 | gspca_dev->sequence = 0; | |
1200 | atomic_set(&gspca_dev->nevent, 0); | |
1201 | ret = 0; | |
4aa0d037 JFM |
1202 | out: |
1203 | mutex_unlock(&gspca_dev->queue_lock); | |
1204 | return ret; | |
63eb9546 JFM |
1205 | } |
1206 | ||
1207 | static int vidioc_g_jpegcomp(struct file *file, void *priv, | |
1208 | struct v4l2_jpegcompression *jpegcomp) | |
1209 | { | |
1210 | struct gspca_dev *gspca_dev = priv; | |
1211 | int ret; | |
1212 | ||
1213 | if (!gspca_dev->sd_desc->get_jcomp) | |
1214 | return -EINVAL; | |
e2997a72 HG |
1215 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1216 | return -ERESTARTSYS; | |
63eb9546 JFM |
1217 | ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); |
1218 | mutex_unlock(&gspca_dev->usb_lock); | |
1219 | return ret; | |
1220 | } | |
1221 | ||
1222 | static int vidioc_s_jpegcomp(struct file *file, void *priv, | |
1223 | struct v4l2_jpegcompression *jpegcomp) | |
1224 | { | |
1225 | struct gspca_dev *gspca_dev = priv; | |
1226 | int ret; | |
1227 | ||
e2997a72 HG |
1228 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1229 | return -ERESTARTSYS; | |
63eb9546 JFM |
1230 | if (!gspca_dev->sd_desc->set_jcomp) |
1231 | return -EINVAL; | |
1232 | ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); | |
1233 | mutex_unlock(&gspca_dev->usb_lock); | |
1234 | return ret; | |
1235 | } | |
1236 | ||
1237 | static int vidioc_g_parm(struct file *filp, void *priv, | |
1238 | struct v4l2_streamparm *parm) | |
1239 | { | |
1240 | struct gspca_dev *gspca_dev = priv; | |
1241 | ||
6a7eba24 | 1242 | memset(parm, 0, sizeof *parm); |
63eb9546 JFM |
1243 | parm->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
1244 | parm->parm.capture.readbuffers = gspca_dev->nbufread; | |
1245 | return 0; | |
1246 | } | |
1247 | ||
1248 | static int vidioc_s_parm(struct file *filp, void *priv, | |
1249 | struct v4l2_streamparm *parm) | |
1250 | { | |
1251 | struct gspca_dev *gspca_dev = priv; | |
1252 | int n; | |
1253 | ||
63eb9546 JFM |
1254 | n = parm->parm.capture.readbuffers; |
1255 | if (n == 0 || n > GSPCA_MAX_FRAMES) | |
1256 | parm->parm.capture.readbuffers = gspca_dev->nbufread; | |
1257 | else | |
1258 | gspca_dev->nbufread = n; | |
63eb9546 JFM |
1259 | return 0; |
1260 | } | |
1261 | ||
6a7eba24 JFM |
1262 | static int vidioc_s_std(struct file *filp, void *priv, |
1263 | v4l2_std_id *parm) | |
1264 | { | |
1265 | return 0; | |
1266 | } | |
1267 | ||
63eb9546 JFM |
1268 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
1269 | static int vidiocgmbuf(struct file *file, void *priv, | |
1270 | struct video_mbuf *mbuf) | |
1271 | { | |
1272 | struct gspca_dev *gspca_dev = file->private_data; | |
1273 | int i; | |
1274 | ||
1275 | PDEBUG(D_STREAM, "cgmbuf"); | |
1276 | if (gspca_dev->nframes == 0) { | |
63eb9546 | 1277 | int ret; |
6a7eba24 JFM |
1278 | |
1279 | { | |
1280 | struct v4l2_format fmt; | |
1281 | ||
1282 | memset(&fmt, 0, sizeof fmt); | |
1283 | fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1284 | i = gspca_dev->cam.nmodes - 1; /* highest mode */ | |
1285 | fmt.fmt.pix.width = gspca_dev->cam.cam_mode[i].width; | |
1286 | fmt.fmt.pix.height = gspca_dev->cam.cam_mode[i].height; | |
1287 | fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR24; | |
e078770a | 1288 | ret = vidioc_s_fmt_vid_cap(file, priv, &fmt); |
6a7eba24 JFM |
1289 | if (ret != 0) |
1290 | return ret; | |
1291 | } | |
1292 | { | |
1293 | struct v4l2_requestbuffers rb; | |
1294 | ||
1295 | memset(&rb, 0, sizeof rb); | |
1296 | rb.count = 4; | |
1297 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1298 | rb.memory = V4L2_MEMORY_MMAP; | |
1299 | ret = vidioc_reqbufs(file, priv, &rb); | |
1300 | if (ret != 0) | |
1301 | return ret; | |
1302 | } | |
63eb9546 JFM |
1303 | } |
1304 | mbuf->frames = gspca_dev->nframes; | |
1305 | mbuf->size = gspca_dev->frsz * gspca_dev->nframes; | |
1306 | for (i = 0; i < mbuf->frames; i++) | |
1307 | mbuf->offsets[i] = gspca_dev->frame[i].v4l2_buf.m.offset; | |
1308 | return 0; | |
1309 | } | |
1310 | #endif | |
1311 | ||
1312 | static int dev_mmap(struct file *file, struct vm_area_struct *vma) | |
1313 | { | |
1314 | struct gspca_dev *gspca_dev = file->private_data; | |
efab8211 | 1315 | struct gspca_frame *frame; |
63eb9546 JFM |
1316 | struct page *page; |
1317 | unsigned long addr, start, size; | |
1318 | int i, ret; | |
63eb9546 JFM |
1319 | |
1320 | start = vma->vm_start; | |
1321 | size = vma->vm_end - vma->vm_start; | |
1322 | PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size); | |
1323 | ||
e2997a72 HG |
1324 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1325 | return -ERESTARTSYS; | |
63eb9546 JFM |
1326 | if (!gspca_dev->present) { |
1327 | ret = -ENODEV; | |
4aa0d037 JFM |
1328 | goto out; |
1329 | } | |
1330 | if (gspca_dev->capt_file != file) { | |
1331 | ret = -EINVAL; | |
1332 | goto out; | |
63eb9546 JFM |
1333 | } |
1334 | ||
efab8211 | 1335 | frame = NULL; |
63eb9546 JFM |
1336 | for (i = 0; i < gspca_dev->nframes; ++i) { |
1337 | if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) { | |
1338 | PDEBUG(D_STREAM, "mmap bad memory type"); | |
1339 | break; | |
1340 | } | |
1341 | if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT) | |
1342 | == vma->vm_pgoff) { | |
1343 | frame = &gspca_dev->frame[i]; | |
1344 | break; | |
1345 | } | |
1346 | } | |
efab8211 | 1347 | if (frame == NULL) { |
63eb9546 JFM |
1348 | PDEBUG(D_STREAM, "mmap no frame buffer found"); |
1349 | ret = -EINVAL; | |
4aa0d037 | 1350 | goto out; |
63eb9546 JFM |
1351 | } |
1352 | #ifdef CONFIG_VIDEO_V4L1_COMPAT | |
ac0d6df6 JFM |
1353 | /* v4l1 maps all the buffers */ |
1354 | if (i != 0 | |
1355 | || size != frame->v4l2_buf.length * gspca_dev->nframes) | |
63eb9546 | 1356 | #endif |
ac0d6df6 | 1357 | if (size != frame->v4l2_buf.length) { |
63eb9546 JFM |
1358 | PDEBUG(D_STREAM, "mmap bad size"); |
1359 | ret = -EINVAL; | |
4aa0d037 | 1360 | goto out; |
63eb9546 JFM |
1361 | } |
1362 | ||
1363 | /* | |
1364 | * - VM_IO marks the area as being a mmaped region for I/O to a | |
1365 | * device. It also prevents the region from being core dumped. | |
1366 | */ | |
1367 | vma->vm_flags |= VM_IO; | |
1368 | ||
1369 | addr = (unsigned long) frame->data; | |
1370 | while (size > 0) { | |
1371 | page = vmalloc_to_page((void *) addr); | |
1372 | ret = vm_insert_page(vma, start, page); | |
1373 | if (ret < 0) | |
4aa0d037 | 1374 | goto out; |
63eb9546 JFM |
1375 | start += PAGE_SIZE; |
1376 | addr += PAGE_SIZE; | |
1377 | size -= PAGE_SIZE; | |
1378 | } | |
1379 | ||
1380 | vma->vm_ops = &gspca_vm_ops; | |
1381 | vma->vm_private_data = frame; | |
1382 | gspca_vm_open(vma); | |
e2997a72 | 1383 | ret = 0; |
4aa0d037 | 1384 | out: |
63eb9546 JFM |
1385 | mutex_unlock(&gspca_dev->queue_lock); |
1386 | return ret; | |
1387 | } | |
1388 | ||
63eb9546 JFM |
1389 | /* |
1390 | * wait for a video frame | |
1391 | * | |
1392 | * If a frame is ready, its index is returned. | |
1393 | */ | |
d43fa32f | 1394 | static int frame_wait(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1395 | int nonblock_ing) |
1396 | { | |
1397 | struct gspca_frame *frame; | |
1398 | int i, j, ret; | |
1399 | ||
d43fa32f | 1400 | /* check if a frame is ready */ |
63eb9546 JFM |
1401 | i = gspca_dev->fr_o; |
1402 | j = gspca_dev->fr_queue[i]; | |
1403 | frame = &gspca_dev->frame[j]; | |
82643d0e JFM |
1404 | if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) { |
1405 | atomic_dec(&gspca_dev->nevent); | |
63eb9546 | 1406 | goto ok; |
82643d0e | 1407 | } |
63eb9546 JFM |
1408 | if (nonblock_ing) /* no frame yet */ |
1409 | return -EAGAIN; | |
1410 | ||
1411 | /* wait till a frame is ready */ | |
1412 | for (;;) { | |
4aa0d037 JFM |
1413 | ret = wait_event_interruptible_timeout(gspca_dev->wq, |
1414 | atomic_read(&gspca_dev->nevent) > 0, | |
1415 | msecs_to_jiffies(3000)); | |
1416 | if (ret <= 0) { | |
1417 | if (ret < 0) | |
82643d0e JFM |
1418 | return ret; /* interrupt */ |
1419 | return -EIO; /* timeout */ | |
4aa0d037 | 1420 | } |
82643d0e | 1421 | atomic_dec(&gspca_dev->nevent); |
e2997a72 HG |
1422 | if (!gspca_dev->streaming || !gspca_dev->present) |
1423 | return -EIO; | |
63eb9546 JFM |
1424 | i = gspca_dev->fr_o; |
1425 | j = gspca_dev->fr_queue[i]; | |
1426 | frame = &gspca_dev->frame[j]; | |
1427 | if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) | |
1428 | break; | |
1429 | } | |
63eb9546 | 1430 | ok: |
63eb9546 JFM |
1431 | gspca_dev->fr_o = (i + 1) % gspca_dev->nframes; |
1432 | PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d", | |
1433 | gspca_dev->fr_q, | |
1434 | gspca_dev->fr_i, | |
1435 | gspca_dev->fr_o); | |
e2997a72 | 1436 | |
739570bb JFM |
1437 | if (gspca_dev->sd_desc->dq_callback) { |
1438 | mutex_lock(&gspca_dev->usb_lock); | |
e2997a72 | 1439 | gspca_dev->sd_desc->dq_callback(gspca_dev); |
739570bb JFM |
1440 | mutex_unlock(&gspca_dev->usb_lock); |
1441 | } | |
63eb9546 JFM |
1442 | return j; |
1443 | } | |
1444 | ||
1445 | /* | |
1446 | * dequeue a video buffer | |
1447 | * | |
1448 | * If nonblock_ing is false, block until a buffer is available. | |
1449 | */ | |
1450 | static int vidioc_dqbuf(struct file *file, void *priv, | |
1451 | struct v4l2_buffer *v4l2_buf) | |
1452 | { | |
1453 | struct gspca_dev *gspca_dev = priv; | |
1454 | struct gspca_frame *frame; | |
1455 | int i, ret; | |
1456 | ||
1457 | PDEBUG(D_FRAM, "dqbuf"); | |
ac0d6df6 JFM |
1458 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1459 | return -EINVAL; | |
1460 | if (v4l2_buf->memory != gspca_dev->memory) | |
63eb9546 | 1461 | return -EINVAL; |
5b77ae77 JFM |
1462 | |
1463 | /* if not streaming, be sure the application will not loop forever */ | |
1464 | if (!(file->f_flags & O_NONBLOCK) | |
1465 | && !gspca_dev->streaming && gspca_dev->users == 1) | |
63eb9546 JFM |
1466 | return -EINVAL; |
1467 | ||
5b77ae77 JFM |
1468 | /* only the capturing file may dequeue */ |
1469 | if (gspca_dev->capt_file != file) | |
1470 | return -EINVAL; | |
1471 | ||
1472 | /* only one dequeue / read at a time */ | |
63eb9546 JFM |
1473 | if (mutex_lock_interruptible(&gspca_dev->read_lock)) |
1474 | return -ERESTARTSYS; | |
1475 | ||
d43fa32f | 1476 | ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK); |
63eb9546 | 1477 | if (ret < 0) |
4aa0d037 | 1478 | goto out; |
63eb9546 JFM |
1479 | i = ret; /* frame index */ |
1480 | frame = &gspca_dev->frame[i]; | |
ac0d6df6 | 1481 | if (gspca_dev->memory == V4L2_MEMORY_USERPTR) { |
c6eb8eaf | 1482 | if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr, |
ac0d6df6 JFM |
1483 | frame->data, |
1484 | frame->v4l2_buf.bytesused)) { | |
1485 | PDEBUG(D_ERR|D_STREAM, | |
1486 | "dqbuf cp to user failed"); | |
1487 | ret = -EFAULT; | |
1488 | goto out; | |
1489 | } | |
1490 | } | |
63eb9546 JFM |
1491 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; |
1492 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1493 | PDEBUG(D_FRAM, "dqbuf %d", i); | |
1494 | ret = 0; | |
4aa0d037 | 1495 | out: |
63eb9546 JFM |
1496 | mutex_unlock(&gspca_dev->read_lock); |
1497 | return ret; | |
1498 | } | |
1499 | ||
1500 | /* | |
1501 | * queue a video buffer | |
1502 | * | |
1503 | * Attempting to queue a buffer that has already been | |
1504 | * queued will return -EINVAL. | |
1505 | */ | |
1506 | static int vidioc_qbuf(struct file *file, void *priv, | |
1507 | struct v4l2_buffer *v4l2_buf) | |
1508 | { | |
1509 | struct gspca_dev *gspca_dev = priv; | |
1510 | struct gspca_frame *frame; | |
1511 | int i, index, ret; | |
1512 | ||
1513 | PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index); | |
1514 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1515 | return -EINVAL; | |
1516 | ||
5b77ae77 JFM |
1517 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1518 | return -ERESTARTSYS; | |
1519 | ||
63eb9546 JFM |
1520 | index = v4l2_buf->index; |
1521 | if ((unsigned) index >= gspca_dev->nframes) { | |
d43fa32f | 1522 | PDEBUG(D_FRAM, |
63eb9546 | 1523 | "qbuf idx %d >= %d", index, gspca_dev->nframes); |
5b77ae77 JFM |
1524 | ret = -EINVAL; |
1525 | goto out; | |
63eb9546 | 1526 | } |
5b77ae77 | 1527 | if (v4l2_buf->memory != gspca_dev->memory) { |
d43fa32f | 1528 | PDEBUG(D_FRAM, "qbuf bad memory type"); |
5b77ae77 JFM |
1529 | ret = -EINVAL; |
1530 | goto out; | |
63eb9546 | 1531 | } |
e2997a72 | 1532 | |
5b77ae77 | 1533 | frame = &gspca_dev->frame[index]; |
d43fa32f JFM |
1534 | if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) { |
1535 | PDEBUG(D_FRAM, "qbuf bad state"); | |
63eb9546 JFM |
1536 | ret = -EINVAL; |
1537 | goto out; | |
1538 | } | |
1539 | ||
1540 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED; | |
d43fa32f | 1541 | /* frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; */ |
63eb9546 | 1542 | |
d43fa32f | 1543 | if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) { |
63eb9546 JFM |
1544 | frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr; |
1545 | frame->v4l2_buf.length = v4l2_buf->length; | |
1546 | } | |
1547 | ||
1548 | /* put the buffer in the 'queued' queue */ | |
1549 | i = gspca_dev->fr_q; | |
1550 | gspca_dev->fr_queue[i] = index; | |
1551 | gspca_dev->fr_q = (i + 1) % gspca_dev->nframes; | |
1552 | PDEBUG(D_FRAM, "qbuf q:%d i:%d o:%d", | |
1553 | gspca_dev->fr_q, | |
1554 | gspca_dev->fr_i, | |
1555 | gspca_dev->fr_o); | |
1556 | ||
1557 | v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED; | |
1558 | v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE; | |
1559 | ret = 0; | |
1560 | out: | |
1561 | mutex_unlock(&gspca_dev->queue_lock); | |
1562 | return ret; | |
1563 | } | |
1564 | ||
d43fa32f JFM |
1565 | /* |
1566 | * allocate the resources for read() | |
1567 | */ | |
1568 | static int read_alloc(struct gspca_dev *gspca_dev, | |
1569 | struct file *file) | |
63eb9546 | 1570 | { |
63eb9546 | 1571 | struct v4l2_buffer v4l2_buf; |
d43fa32f | 1572 | int i, ret; |
63eb9546 | 1573 | |
d43fa32f | 1574 | PDEBUG(D_STREAM, "read alloc"); |
63eb9546 JFM |
1575 | if (gspca_dev->nframes == 0) { |
1576 | struct v4l2_requestbuffers rb; | |
1577 | ||
1578 | memset(&rb, 0, sizeof rb); | |
1579 | rb.count = gspca_dev->nbufread; | |
1580 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1581 | rb.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1582 | ret = vidioc_reqbufs(file, gspca_dev, &rb); |
1583 | if (ret != 0) { | |
d43fa32f | 1584 | PDEBUG(D_STREAM, "read reqbuf err %d", ret); |
63eb9546 JFM |
1585 | return ret; |
1586 | } | |
1587 | memset(&v4l2_buf, 0, sizeof v4l2_buf); | |
1588 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1589 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1590 | for (i = 0; i < gspca_dev->nbufread; i++) { |
1591 | v4l2_buf.index = i; | |
63eb9546 JFM |
1592 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); |
1593 | if (ret != 0) { | |
1594 | PDEBUG(D_STREAM, "read qbuf err: %d", ret); | |
1595 | return ret; | |
1596 | } | |
1597 | } | |
d43fa32f JFM |
1598 | gspca_dev->memory = GSPCA_MEMORY_READ; |
1599 | } | |
4aa0d037 | 1600 | |
d43fa32f JFM |
1601 | /* start streaming */ |
1602 | ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE); | |
1603 | if (ret != 0) | |
1604 | PDEBUG(D_STREAM, "read streamon err %d", ret); | |
1605 | return ret; | |
1606 | } | |
1607 | ||
1608 | static unsigned int dev_poll(struct file *file, poll_table *wait) | |
1609 | { | |
1610 | struct gspca_dev *gspca_dev = file->private_data; | |
1611 | int i, ret; | |
1612 | ||
1613 | PDEBUG(D_FRAM, "poll"); | |
1614 | ||
1615 | poll_wait(file, &gspca_dev->wq, wait); | |
1616 | if (!gspca_dev->present) | |
1617 | return POLLERR; | |
1618 | ||
5b77ae77 JFM |
1619 | /* if reqbufs is not done, the user would use read() */ |
1620 | if (gspca_dev->nframes == 0) { | |
1621 | if (gspca_dev->memory != GSPCA_MEMORY_NO) | |
1622 | return POLLERR; /* not the 1st time */ | |
d43fa32f | 1623 | ret = read_alloc(gspca_dev, file); |
5b77ae77 JFM |
1624 | if (ret != 0) |
1625 | return POLLERR; | |
63eb9546 JFM |
1626 | } |
1627 | ||
d43fa32f JFM |
1628 | if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) |
1629 | return POLLERR; | |
1630 | if (!gspca_dev->present) { | |
1631 | ret = POLLERR; | |
1632 | goto out; | |
1633 | } | |
1634 | ||
5b77ae77 | 1635 | /* check the next incoming buffer */ |
d43fa32f JFM |
1636 | i = gspca_dev->fr_o; |
1637 | i = gspca_dev->fr_queue[i]; | |
1638 | if (gspca_dev->frame[i].v4l2_buf.flags & V4L2_BUF_FLAG_DONE) | |
1639 | ret = POLLIN | POLLRDNORM; /* something to read */ | |
1640 | else | |
1641 | ret = 0; | |
1642 | out: | |
1643 | mutex_unlock(&gspca_dev->queue_lock); | |
1644 | return ret; | |
1645 | } | |
1646 | ||
1647 | static ssize_t dev_read(struct file *file, char __user *data, | |
1648 | size_t count, loff_t *ppos) | |
1649 | { | |
1650 | struct gspca_dev *gspca_dev = file->private_data; | |
1651 | struct gspca_frame *frame; | |
1652 | struct v4l2_buffer v4l2_buf; | |
1653 | struct timeval timestamp; | |
82643d0e | 1654 | int n, ret, ret2; |
d43fa32f | 1655 | |
a9e11134 | 1656 | PDEBUG(D_FRAM, "read (%zd)", count); |
d43fa32f JFM |
1657 | if (!gspca_dev->present) |
1658 | return -ENODEV; | |
1659 | switch (gspca_dev->memory) { | |
1660 | case GSPCA_MEMORY_NO: /* first time */ | |
1661 | ret = read_alloc(gspca_dev, file); | |
1662 | if (ret != 0) | |
1663 | return ret; | |
1664 | break; | |
1665 | case GSPCA_MEMORY_READ: | |
82643d0e JFM |
1666 | if (gspca_dev->capt_file == file) |
1667 | break; | |
1668 | /* fall thru */ | |
d43fa32f JFM |
1669 | default: |
1670 | return -EINVAL; | |
1671 | } | |
1672 | ||
63eb9546 JFM |
1673 | /* get a frame */ |
1674 | jiffies_to_timeval(get_jiffies_64(), ×tamp); | |
1675 | timestamp.tv_sec--; | |
82643d0e JFM |
1676 | n = 2; |
1677 | for (;;) { | |
63eb9546 JFM |
1678 | memset(&v4l2_buf, 0, sizeof v4l2_buf); |
1679 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1680 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1681 | ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf); |
1682 | if (ret != 0) { | |
1683 | PDEBUG(D_STREAM, "read dqbuf err %d", ret); | |
1684 | return ret; | |
1685 | } | |
1686 | ||
1687 | /* if the process slept for more than 1 second, | |
82643d0e | 1688 | * get anewer frame */ |
63eb9546 | 1689 | frame = &gspca_dev->frame[v4l2_buf.index]; |
82643d0e JFM |
1690 | if (--n < 0) |
1691 | break; /* avoid infinite loop */ | |
63eb9546 JFM |
1692 | if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec) |
1693 | break; | |
1694 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1695 | if (ret != 0) { | |
1696 | PDEBUG(D_STREAM, "read qbuf err %d", ret); | |
1697 | return ret; | |
1698 | } | |
1699 | } | |
1700 | ||
1701 | /* copy the frame */ | |
ac0d6df6 JFM |
1702 | if (count > frame->v4l2_buf.bytesused) |
1703 | count = frame->v4l2_buf.bytesused; | |
63eb9546 JFM |
1704 | ret = copy_to_user(data, frame->data, count); |
1705 | if (ret != 0) { | |
1706 | PDEBUG(D_ERR|D_STREAM, | |
a9e11134 | 1707 | "read cp to user lack %d / %zd", ret, count); |
63eb9546 JFM |
1708 | ret = -EFAULT; |
1709 | goto out; | |
1710 | } | |
1711 | ret = count; | |
1712 | out: | |
1713 | /* in each case, requeue the buffer */ | |
1714 | ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1715 | if (ret2 != 0) | |
1716 | return ret2; | |
1717 | return ret; | |
1718 | } | |
1719 | ||
d43fa32f | 1720 | static void dev_release(struct video_device *vfd) |
63eb9546 JFM |
1721 | { |
1722 | /* nothing */ | |
1723 | } | |
1724 | ||
1725 | static struct file_operations dev_fops = { | |
1726 | .owner = THIS_MODULE, | |
1727 | .open = dev_open, | |
1728 | .release = dev_close, | |
1729 | .read = dev_read, | |
1730 | .mmap = dev_mmap, | |
1731 | .ioctl = video_ioctl2, | |
6a7eba24 JFM |
1732 | #ifdef CONFIG_COMPAT |
1733 | .compat_ioctl = v4l_compat_ioctl32, | |
1734 | #endif | |
63eb9546 JFM |
1735 | .llseek = no_llseek, |
1736 | .poll = dev_poll, | |
1737 | }; | |
1738 | ||
a399810c | 1739 | static const struct v4l2_ioctl_ops dev_ioctl_ops = { |
63eb9546 JFM |
1740 | .vidioc_querycap = vidioc_querycap, |
1741 | .vidioc_dqbuf = vidioc_dqbuf, | |
1742 | .vidioc_qbuf = vidioc_qbuf, | |
e078770a MCC |
1743 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
1744 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
1745 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
1746 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
63eb9546 JFM |
1747 | .vidioc_streamon = vidioc_streamon, |
1748 | .vidioc_queryctrl = vidioc_queryctrl, | |
1749 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
1750 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
1751 | .vidioc_querymenu = vidioc_querymenu, | |
1752 | .vidioc_enum_input = vidioc_enum_input, | |
1753 | .vidioc_g_input = vidioc_g_input, | |
1754 | .vidioc_s_input = vidioc_s_input, | |
1755 | .vidioc_reqbufs = vidioc_reqbufs, | |
1756 | .vidioc_querybuf = vidioc_querybuf, | |
1757 | .vidioc_streamoff = vidioc_streamoff, | |
1758 | .vidioc_g_jpegcomp = vidioc_g_jpegcomp, | |
1759 | .vidioc_s_jpegcomp = vidioc_s_jpegcomp, | |
1760 | .vidioc_g_parm = vidioc_g_parm, | |
1761 | .vidioc_s_parm = vidioc_s_parm, | |
6a7eba24 | 1762 | .vidioc_s_std = vidioc_s_std, |
63eb9546 JFM |
1763 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
1764 | .vidiocgmbuf = vidiocgmbuf, | |
1765 | #endif | |
1766 | }; | |
1767 | ||
a399810c HV |
1768 | static struct video_device gspca_template = { |
1769 | .name = "gspca main driver", | |
a399810c HV |
1770 | .fops = &dev_fops, |
1771 | .ioctl_ops = &dev_ioctl_ops, | |
1772 | .release = dev_release, /* mandatory */ | |
1773 | .minor = -1, | |
1774 | }; | |
1775 | ||
63eb9546 JFM |
1776 | /* |
1777 | * probe and create a new gspca device | |
1778 | * | |
1779 | * This function must be called by the sub-driver when it is | |
1780 | * called for probing a new device. | |
1781 | */ | |
1782 | int gspca_dev_probe(struct usb_interface *intf, | |
1783 | const struct usb_device_id *id, | |
1784 | const struct sd_desc *sd_desc, | |
d43fa32f JFM |
1785 | int dev_size, |
1786 | struct module *module) | |
63eb9546 JFM |
1787 | { |
1788 | struct usb_interface_descriptor *interface; | |
1789 | struct gspca_dev *gspca_dev; | |
1790 | struct usb_device *dev = interface_to_usbdev(intf); | |
1791 | int ret; | |
63eb9546 | 1792 | |
6a7eba24 | 1793 | PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct); |
63eb9546 JFM |
1794 | |
1795 | /* we don't handle multi-config cameras */ | |
1796 | if (dev->descriptor.bNumConfigurations != 1) | |
1797 | return -ENODEV; | |
1798 | interface = &intf->cur_altsetting->desc; | |
1799 | if (interface->bInterfaceNumber > 0) | |
1800 | return -ENODEV; | |
1801 | ||
1802 | /* create the device */ | |
1803 | if (dev_size < sizeof *gspca_dev) | |
1804 | dev_size = sizeof *gspca_dev; | |
1805 | gspca_dev = kzalloc(dev_size, GFP_KERNEL); | |
1806 | if (gspca_dev == NULL) { | |
1807 | err("couldn't kzalloc gspca struct"); | |
1808 | return -EIO; | |
1809 | } | |
8295d99e JFM |
1810 | gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL); |
1811 | if (!gspca_dev->usb_buf) { | |
1812 | err("out of memory"); | |
1813 | ret = -EIO; | |
1814 | goto out; | |
1815 | } | |
63eb9546 JFM |
1816 | gspca_dev->dev = dev; |
1817 | gspca_dev->iface = interface->bInterfaceNumber; | |
d43fa32f | 1818 | gspca_dev->nbalt = intf->num_altsetting; |
63eb9546 JFM |
1819 | gspca_dev->sd_desc = sd_desc; |
1820 | /* gspca_dev->users = 0; (done by kzalloc) */ | |
1821 | gspca_dev->nbufread = 2; | |
1822 | ||
012d6b02 | 1823 | /* configure the subdriver and initialize the USB device */ |
63eb9546 | 1824 | ret = gspca_dev->sd_desc->config(gspca_dev, id); |
012d6b02 JFM |
1825 | if (ret < 0) |
1826 | goto out; | |
1827 | ret = gspca_dev->sd_desc->init(gspca_dev); | |
63eb9546 JFM |
1828 | if (ret < 0) |
1829 | goto out; | |
1830 | ret = gspca_set_alt0(gspca_dev); | |
1831 | if (ret < 0) | |
1832 | goto out; | |
1833 | gspca_set_default_mode(gspca_dev); | |
1834 | ||
1835 | mutex_init(&gspca_dev->usb_lock); | |
1836 | mutex_init(&gspca_dev->read_lock); | |
1837 | mutex_init(&gspca_dev->queue_lock); | |
1838 | init_waitqueue_head(&gspca_dev->wq); | |
1839 | ||
1840 | /* init video stuff */ | |
1841 | memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template); | |
5e85e732 | 1842 | gspca_dev->vdev.parent = &dev->dev; |
d43fa32f JFM |
1843 | memcpy(&gspca_dev->fops, &dev_fops, sizeof gspca_dev->fops); |
1844 | gspca_dev->vdev.fops = &gspca_dev->fops; | |
1845 | gspca_dev->fops.owner = module; /* module protection */ | |
ee56a4d3 | 1846 | gspca_dev->present = 1; |
63eb9546 JFM |
1847 | ret = video_register_device(&gspca_dev->vdev, |
1848 | VFL_TYPE_GRABBER, | |
1849 | video_nr); | |
1850 | if (ret < 0) { | |
1851 | err("video_register_device err %d", ret); | |
1852 | goto out; | |
1853 | } | |
1854 | ||
63eb9546 JFM |
1855 | usb_set_intfdata(intf, gspca_dev); |
1856 | PDEBUG(D_PROBE, "probe ok"); | |
1857 | return 0; | |
1858 | out: | |
8295d99e | 1859 | kfree(gspca_dev->usb_buf); |
63eb9546 JFM |
1860 | kfree(gspca_dev); |
1861 | return ret; | |
1862 | } | |
1863 | EXPORT_SYMBOL(gspca_dev_probe); | |
1864 | ||
1865 | /* | |
1866 | * USB disconnection | |
1867 | * | |
1868 | * This function must be called by the sub-driver | |
1869 | * when the device disconnects, after the specific resources are freed. | |
1870 | */ | |
1871 | void gspca_disconnect(struct usb_interface *intf) | |
1872 | { | |
4aa0d037 | 1873 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
63eb9546 JFM |
1874 | |
1875 | if (!gspca_dev) | |
1876 | return; | |
1877 | gspca_dev->present = 0; | |
e2997a72 HG |
1878 | mutex_lock(&gspca_dev->queue_lock); |
1879 | mutex_lock(&gspca_dev->usb_lock); | |
1880 | gspca_dev->streaming = 0; | |
d43fa32f | 1881 | destroy_urbs(gspca_dev); |
63eb9546 | 1882 | mutex_unlock(&gspca_dev->usb_lock); |
e2997a72 | 1883 | mutex_unlock(&gspca_dev->queue_lock); |
63eb9546 JFM |
1884 | while (gspca_dev->users != 0) { /* wait until fully closed */ |
1885 | atomic_inc(&gspca_dev->nevent); | |
1886 | wake_up_interruptible(&gspca_dev->wq); /* wake processes */ | |
1887 | schedule(); | |
1888 | } | |
1889 | /* We don't want people trying to open up the device */ | |
1890 | video_unregister_device(&gspca_dev->vdev); | |
1891 | /* Free the memory */ | |
8295d99e | 1892 | kfree(gspca_dev->usb_buf); |
63eb9546 JFM |
1893 | kfree(gspca_dev); |
1894 | PDEBUG(D_PROBE, "disconnect complete"); | |
1895 | } | |
1896 | EXPORT_SYMBOL(gspca_disconnect); | |
1897 | ||
6a709749 JFM |
1898 | #ifdef CONFIG_PM |
1899 | int gspca_suspend(struct usb_interface *intf, pm_message_t message) | |
1900 | { | |
1901 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
1902 | ||
1903 | if (!gspca_dev->streaming) | |
1904 | return 0; | |
1905 | gspca_dev->frozen = 1; /* avoid urb error messages */ | |
012d6b02 JFM |
1906 | if (gspca_dev->sd_desc->stopN) |
1907 | gspca_dev->sd_desc->stopN(gspca_dev); | |
6a709749 JFM |
1908 | destroy_urbs(gspca_dev); |
1909 | gspca_set_alt0(gspca_dev); | |
012d6b02 JFM |
1910 | if (gspca_dev->sd_desc->stop0) |
1911 | gspca_dev->sd_desc->stop0(gspca_dev); | |
6a709749 JFM |
1912 | return 0; |
1913 | } | |
1914 | EXPORT_SYMBOL(gspca_suspend); | |
1915 | ||
1916 | int gspca_resume(struct usb_interface *intf) | |
1917 | { | |
1918 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
1919 | ||
1920 | gspca_dev->frozen = 0; | |
012d6b02 JFM |
1921 | gspca_dev->sd_desc->init(gspca_dev); |
1922 | if (gspca_dev->streaming) | |
1923 | return gspca_init_transfer(gspca_dev); | |
1e89e2da | 1924 | return 0; |
6a709749 JFM |
1925 | } |
1926 | EXPORT_SYMBOL(gspca_resume); | |
1927 | #endif | |
dcef3237 HG |
1928 | /* -- cam driver utility functions -- */ |
1929 | ||
1930 | /* auto gain and exposure algorithm based on the knee algorithm described here: | |
1931 | http://ytse.tricolour.net/docs/LowLightOptimization.html | |
1932 | ||
1933 | Returns 0 if no changes were made, 1 if the gain and or exposure settings | |
1934 | where changed. */ | |
1935 | int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum, | |
1936 | int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee) | |
1937 | { | |
1938 | int i, steps, gain, orig_gain, exposure, orig_exposure, autogain; | |
1939 | const struct ctrl *gain_ctrl = NULL; | |
1940 | const struct ctrl *exposure_ctrl = NULL; | |
1941 | const struct ctrl *autogain_ctrl = NULL; | |
1942 | int retval = 0; | |
1943 | ||
1944 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
1945 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN) | |
1946 | gain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
1947 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE) | |
1948 | exposure_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
1949 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN) | |
1950 | autogain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
1951 | } | |
1952 | if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) { | |
1953 | PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called " | |
1954 | "on cam without (auto)gain/exposure"); | |
1955 | return 0; | |
1956 | } | |
1957 | ||
1958 | if (gain_ctrl->get(gspca_dev, &gain) || | |
1959 | exposure_ctrl->get(gspca_dev, &exposure) || | |
1960 | autogain_ctrl->get(gspca_dev, &autogain) || !autogain) | |
1961 | return 0; | |
1962 | ||
1963 | orig_gain = gain; | |
1964 | orig_exposure = exposure; | |
1965 | ||
1966 | /* If we are of a multiple of deadzone, do multiple steps to reach the | |
1967 | desired lumination fast (with the risc of a slight overshoot) */ | |
1968 | steps = abs(desired_avg_lum - avg_lum) / deadzone; | |
1969 | ||
1970 | PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d\n", | |
1971 | avg_lum, desired_avg_lum, steps); | |
1972 | ||
1973 | for (i = 0; i < steps; i++) { | |
1974 | if (avg_lum > desired_avg_lum) { | |
1975 | if (gain > gain_knee) | |
1976 | gain--; | |
1977 | else if (exposure > exposure_knee) | |
1978 | exposure--; | |
1979 | else if (gain > gain_ctrl->qctrl.default_value) | |
1980 | gain--; | |
1981 | else if (exposure > exposure_ctrl->qctrl.minimum) | |
1982 | exposure--; | |
1983 | else if (gain > gain_ctrl->qctrl.minimum) | |
1984 | gain--; | |
1985 | else | |
1986 | break; | |
1987 | } else { | |
1988 | if (gain < gain_ctrl->qctrl.default_value) | |
1989 | gain++; | |
1990 | else if (exposure < exposure_knee) | |
1991 | exposure++; | |
1992 | else if (gain < gain_knee) | |
1993 | gain++; | |
1994 | else if (exposure < exposure_ctrl->qctrl.maximum) | |
1995 | exposure++; | |
1996 | else if (gain < gain_ctrl->qctrl.maximum) | |
1997 | gain++; | |
1998 | else | |
1999 | break; | |
2000 | } | |
2001 | } | |
2002 | ||
2003 | if (gain != orig_gain) { | |
2004 | gain_ctrl->set(gspca_dev, gain); | |
2005 | retval = 1; | |
2006 | } | |
2007 | if (exposure != orig_exposure) { | |
2008 | exposure_ctrl->set(gspca_dev, exposure); | |
2009 | retval = 1; | |
2010 | } | |
2011 | ||
2012 | return retval; | |
2013 | } | |
2014 | EXPORT_SYMBOL(gspca_auto_gain_n_exposure); | |
2015 | ||
63eb9546 JFM |
2016 | /* -- module insert / remove -- */ |
2017 | static int __init gspca_init(void) | |
2018 | { | |
bb64e86c JFM |
2019 | info("main v%d.%d.%d registered", |
2020 | (DRIVER_VERSION_NUMBER >> 16) & 0xff, | |
2021 | (DRIVER_VERSION_NUMBER >> 8) & 0xff, | |
2022 | DRIVER_VERSION_NUMBER & 0xff); | |
63eb9546 JFM |
2023 | return 0; |
2024 | } | |
2025 | static void __exit gspca_exit(void) | |
2026 | { | |
2027 | info("main deregistered"); | |
2028 | } | |
2029 | ||
2030 | module_init(gspca_init); | |
2031 | module_exit(gspca_exit); | |
2032 | ||
335b3f88 | 2033 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
2034 | module_param_named(debug, gspca_debug, int, 0644); |
2035 | MODULE_PARM_DESC(debug, | |
2036 | "Debug (bit) 0x01:error 0x02:probe 0x04:config" | |
d43fa32f JFM |
2037 | " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout" |
2038 | " 0x0100: v4l2"); | |
6a7eba24 | 2039 | #endif |