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> |
6b060ffe | 33 | #include <linux/kref.h> |
63eb9546 | 34 | #include <asm/page.h> |
956e42d2 | 35 | #include <linux/uaccess.h> |
63eb9546 | 36 | #include <linux/jiffies.h> |
35ea11ff | 37 | #include <media/v4l2-ioctl.h> |
63eb9546 JFM |
38 | |
39 | #include "gspca.h" | |
40 | ||
d43fa32f | 41 | /* global values */ |
ac0d6df6 | 42 | #define DEF_NURBS 2 /* default number of URBs */ |
d43fa32f | 43 | |
63eb9546 JFM |
44 | MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>"); |
45 | MODULE_DESCRIPTION("GSPCA USB Camera Driver"); | |
46 | MODULE_LICENSE("GPL"); | |
47 | ||
3371bcc3 | 48 | #define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 3, 0) |
63eb9546 JFM |
49 | |
50 | static int video_nr = -1; | |
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; |
6a7eba24 | 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) { |
62ee8eee | 135 | #ifdef CONFIG_PM |
6a709749 | 136 | if (!gspca_dev->frozen) |
62ee8eee | 137 | #endif |
6a709749 | 138 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); |
6a7eba24 JFM |
139 | return; /* disconnection ? */ |
140 | } | |
63eb9546 JFM |
141 | pkt_scan = gspca_dev->sd_desc->pkt_scan; |
142 | for (i = 0; i < urb->number_of_packets; i++) { | |
143 | ||
144 | /* check the availability of the frame buffer */ | |
1b60e1ad JFM |
145 | frame = gspca_get_i_frame(gspca_dev); |
146 | if (!frame) { | |
63eb9546 JFM |
147 | gspca_dev->last_packet_type = DISCARD_PACKET; |
148 | break; | |
149 | } | |
150 | ||
151 | /* check the packet status and length */ | |
152 | len = urb->iso_frame_desc[i].actual_length; | |
6a7eba24 JFM |
153 | if (len == 0) |
154 | continue; | |
63eb9546 JFM |
155 | st = urb->iso_frame_desc[i].status; |
156 | if (st) { | |
6a7eba24 JFM |
157 | PDEBUG(D_ERR, |
158 | "ISOC data error: [%d] len=%d, status=%d", | |
63eb9546 JFM |
159 | i, len, st); |
160 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
161 | continue; | |
162 | } | |
63eb9546 JFM |
163 | |
164 | /* let the packet be analyzed by the subdriver */ | |
165 | PDEBUG(D_PACK, "packet [%d] o:%d l:%d", | |
166 | i, urb->iso_frame_desc[i].offset, len); | |
6a7eba24 | 167 | data = (__u8 *) urb->transfer_buffer |
63eb9546 JFM |
168 | + urb->iso_frame_desc[i].offset; |
169 | pkt_scan(gspca_dev, frame, data, len); | |
170 | } | |
171 | ||
172 | /* resubmit the URB */ | |
173 | urb->status = 0; | |
174 | st = usb_submit_urb(urb, GFP_ATOMIC); | |
175 | if (st < 0) | |
176 | PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st); | |
177 | } | |
178 | ||
d43fa32f JFM |
179 | /* |
180 | * ISOC message interrupt from the USB device | |
181 | * | |
ac0d6df6 | 182 | * Analyse each packet and call the subdriver for copy to the frame buffer. |
d43fa32f | 183 | */ |
ac0d6df6 | 184 | static void isoc_irq(struct urb *urb |
6a7eba24 | 185 | ) |
d43fa32f JFM |
186 | { |
187 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
188 | ||
3647fea8 | 189 | PDEBUG(D_PACK, "isoc irq"); |
d43fa32f JFM |
190 | if (!gspca_dev->streaming) |
191 | return; | |
192 | fill_frame(gspca_dev, urb); | |
193 | } | |
194 | ||
0be01004 JFM |
195 | /* |
196 | * bulk message interrupt from the USB device | |
197 | */ | |
198 | static void bulk_irq(struct urb *urb | |
199 | ) | |
200 | { | |
201 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
202 | struct gspca_frame *frame; | |
0be01004 JFM |
203 | |
204 | PDEBUG(D_PACK, "bulk irq"); | |
205 | if (!gspca_dev->streaming) | |
206 | return; | |
207 | if (urb->status != 0 && urb->status != -ECONNRESET) { | |
208 | #ifdef CONFIG_PM | |
209 | if (!gspca_dev->frozen) | |
210 | #endif | |
211 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); | |
212 | return; /* disconnection ? */ | |
213 | } | |
214 | ||
215 | /* check the availability of the frame buffer */ | |
1b60e1ad JFM |
216 | frame = gspca_get_i_frame(gspca_dev); |
217 | if (!frame) { | |
0be01004 JFM |
218 | gspca_dev->last_packet_type = DISCARD_PACKET; |
219 | } else { | |
220 | PDEBUG(D_PACK, "packet l:%d", urb->actual_length); | |
221 | gspca_dev->sd_desc->pkt_scan(gspca_dev, | |
222 | frame, | |
223 | urb->transfer_buffer, | |
224 | urb->actual_length); | |
225 | } | |
0be01004 JFM |
226 | } |
227 | ||
63eb9546 JFM |
228 | /* |
229 | * add data to the current frame | |
230 | * | |
ac0d6df6 JFM |
231 | * This function is called by the subdrivers at interrupt level. |
232 | * | |
63eb9546 JFM |
233 | * To build a frame, these ones must add |
234 | * - one FIRST_PACKET | |
235 | * - 0 or many INTER_PACKETs | |
236 | * - one LAST_PACKET | |
237 | * DISCARD_PACKET invalidates the whole frame. | |
238 | * On LAST_PACKET, a new frame is returned. | |
239 | */ | |
240 | struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev, | |
e293e599 | 241 | enum gspca_packet_type packet_type, |
63eb9546 | 242 | struct gspca_frame *frame, |
a5ae2062 | 243 | const __u8 *data, |
63eb9546 JFM |
244 | int len) |
245 | { | |
246 | int i, j; | |
247 | ||
e2997a72 | 248 | PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len); |
63eb9546 JFM |
249 | |
250 | /* when start of a new frame, if the current frame buffer | |
251 | * is not queued, discard the whole frame */ | |
252 | if (packet_type == FIRST_PACKET) { | |
d43fa32f JFM |
253 | if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS) |
254 | != V4L2_BUF_FLAG_QUEUED) { | |
63eb9546 JFM |
255 | gspca_dev->last_packet_type = DISCARD_PACKET; |
256 | return frame; | |
257 | } | |
258 | frame->data_end = frame->data; | |
259 | jiffies_to_timeval(get_jiffies_64(), | |
260 | &frame->v4l2_buf.timestamp); | |
261 | frame->v4l2_buf.sequence = ++gspca_dev->sequence; | |
d43fa32f | 262 | } else if (gspca_dev->last_packet_type == DISCARD_PACKET) { |
06ca78fa JFM |
263 | if (packet_type == LAST_PACKET) |
264 | gspca_dev->last_packet_type = packet_type; | |
63eb9546 | 265 | return frame; |
d43fa32f | 266 | } |
63eb9546 | 267 | |
d43fa32f | 268 | /* append the packet to the frame buffer */ |
63eb9546 JFM |
269 | if (len > 0) { |
270 | if (frame->data_end - frame->data + len | |
271 | > frame->v4l2_buf.length) { | |
a9e11134 | 272 | PDEBUG(D_ERR|D_PACK, "frame overflow %zd > %d", |
63eb9546 JFM |
273 | frame->data_end - frame->data + len, |
274 | frame->v4l2_buf.length); | |
275 | packet_type = DISCARD_PACKET; | |
276 | } else { | |
ac0d6df6 | 277 | memcpy(frame->data_end, data, len); |
63eb9546 JFM |
278 | frame->data_end += len; |
279 | } | |
280 | } | |
281 | gspca_dev->last_packet_type = packet_type; | |
282 | ||
219423c1 | 283 | /* if last packet, wake up the application and advance in the queue */ |
63eb9546 JFM |
284 | if (packet_type == LAST_PACKET) { |
285 | frame->v4l2_buf.bytesused = frame->data_end - frame->data; | |
286 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_QUEUED; | |
287 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_DONE; | |
288 | atomic_inc(&gspca_dev->nevent); | |
289 | wake_up_interruptible(&gspca_dev->wq); /* event = new frame */ | |
d43fa32f JFM |
290 | i = (gspca_dev->fr_i + 1) % gspca_dev->nframes; |
291 | gspca_dev->fr_i = i; | |
63eb9546 JFM |
292 | PDEBUG(D_FRAM, "frame complete len:%d q:%d i:%d o:%d", |
293 | frame->v4l2_buf.bytesused, | |
294 | gspca_dev->fr_q, | |
295 | i, | |
296 | gspca_dev->fr_o); | |
297 | j = gspca_dev->fr_queue[i]; | |
298 | frame = &gspca_dev->frame[j]; | |
63eb9546 JFM |
299 | } |
300 | return frame; | |
301 | } | |
302 | EXPORT_SYMBOL(gspca_frame_add); | |
303 | ||
304 | static int gspca_is_compressed(__u32 format) | |
305 | { | |
306 | switch (format) { | |
307 | case V4L2_PIX_FMT_MJPEG: | |
308 | case V4L2_PIX_FMT_JPEG: | |
50a871fe | 309 | case V4L2_PIX_FMT_SPCA561: |
ab8f12cf | 310 | case V4L2_PIX_FMT_PAC207: |
63eb9546 JFM |
311 | return 1; |
312 | } | |
313 | return 0; | |
314 | } | |
315 | ||
316 | static void *rvmalloc(unsigned long size) | |
317 | { | |
318 | void *mem; | |
319 | unsigned long adr; | |
320 | ||
63eb9546 | 321 | mem = vmalloc_32(size); |
efab8211 | 322 | if (mem != NULL) { |
63eb9546 JFM |
323 | adr = (unsigned long) mem; |
324 | while ((long) size > 0) { | |
325 | SetPageReserved(vmalloc_to_page((void *) adr)); | |
326 | adr += PAGE_SIZE; | |
327 | size -= PAGE_SIZE; | |
328 | } | |
329 | } | |
330 | return mem; | |
331 | } | |
332 | ||
ac0d6df6 | 333 | static void rvfree(void *mem, long size) |
63eb9546 JFM |
334 | { |
335 | unsigned long adr; | |
336 | ||
63eb9546 | 337 | adr = (unsigned long) mem; |
ac0d6df6 | 338 | while (size > 0) { |
63eb9546 JFM |
339 | ClearPageReserved(vmalloc_to_page((void *) adr)); |
340 | adr += PAGE_SIZE; | |
341 | size -= PAGE_SIZE; | |
342 | } | |
343 | vfree(mem); | |
344 | } | |
345 | ||
346 | static int frame_alloc(struct gspca_dev *gspca_dev, | |
d43fa32f | 347 | unsigned int count) |
63eb9546 | 348 | { |
d43fa32f JFM |
349 | struct gspca_frame *frame; |
350 | unsigned int frsz; | |
351 | int i; | |
63eb9546 | 352 | |
c2446b3e JFM |
353 | i = gspca_dev->curr_mode; |
354 | frsz = gspca_dev->cam.cam_mode[i].sizeimage; | |
63eb9546 | 355 | PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz); |
63eb9546 | 356 | frsz = PAGE_ALIGN(frsz); |
63eb9546 | 357 | gspca_dev->frsz = frsz; |
c2446b3e JFM |
358 | if (count > GSPCA_MAX_FRAMES) |
359 | count = GSPCA_MAX_FRAMES; | |
ac0d6df6 JFM |
360 | gspca_dev->frbuf = rvmalloc(frsz * count); |
361 | if (!gspca_dev->frbuf) { | |
362 | err("frame alloc failed"); | |
363 | return -ENOMEM; | |
63eb9546 JFM |
364 | } |
365 | gspca_dev->nframes = count; | |
366 | for (i = 0; i < count; i++) { | |
d43fa32f JFM |
367 | frame = &gspca_dev->frame[i]; |
368 | frame->v4l2_buf.index = i; | |
369 | frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
370 | frame->v4l2_buf.flags = 0; | |
371 | frame->v4l2_buf.field = V4L2_FIELD_NONE; | |
372 | frame->v4l2_buf.length = frsz; | |
373 | frame->v4l2_buf.memory = gspca_dev->memory; | |
374 | frame->v4l2_buf.sequence = 0; | |
ac0d6df6 | 375 | frame->data = frame->data_end = |
d43fa32f | 376 | gspca_dev->frbuf + i * frsz; |
ac0d6df6 | 377 | frame->v4l2_buf.m.offset = i * frsz; |
63eb9546 JFM |
378 | } |
379 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
380 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
381 | gspca_dev->sequence = 0; | |
382 | atomic_set(&gspca_dev->nevent, 0); | |
d43fa32f | 383 | return 0; |
63eb9546 JFM |
384 | } |
385 | ||
386 | static void frame_free(struct gspca_dev *gspca_dev) | |
387 | { | |
388 | int i; | |
389 | ||
390 | PDEBUG(D_STREAM, "frame free"); | |
efab8211 | 391 | if (gspca_dev->frbuf != NULL) { |
63eb9546 JFM |
392 | rvfree(gspca_dev->frbuf, |
393 | gspca_dev->nframes * gspca_dev->frsz); | |
394 | gspca_dev->frbuf = NULL; | |
395 | for (i = 0; i < gspca_dev->nframes; i++) | |
396 | gspca_dev->frame[i].data = NULL; | |
397 | } | |
398 | gspca_dev->nframes = 0; | |
399 | } | |
400 | ||
d43fa32f | 401 | static void destroy_urbs(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
402 | { |
403 | struct urb *urb; | |
404 | unsigned int i; | |
405 | ||
406 | PDEBUG(D_STREAM, "kill transfer"); | |
44732819 | 407 | for (i = 0; i < MAX_NURBS; i++) { |
4aa0d037 | 408 | urb = gspca_dev->urb[i]; |
63eb9546 | 409 | if (urb == NULL) |
d43fa32f | 410 | break; |
63eb9546 | 411 | |
4aa0d037 | 412 | gspca_dev->urb[i] = NULL; |
63eb9546 | 413 | usb_kill_urb(urb); |
efab8211 | 414 | if (urb->transfer_buffer != NULL) |
63eb9546 JFM |
415 | usb_buffer_free(gspca_dev->dev, |
416 | urb->transfer_buffer_length, | |
4aa0d037 | 417 | urb->transfer_buffer, |
63eb9546 | 418 | urb->transfer_dma); |
63eb9546 JFM |
419 | usb_free_urb(urb); |
420 | } | |
63eb9546 JFM |
421 | } |
422 | ||
423 | /* | |
219423c1 | 424 | * look for an input transfer endpoint in an alternate setting |
63eb9546 | 425 | */ |
0be01004 JFM |
426 | static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, |
427 | __u8 epaddr, | |
428 | __u8 xfer) | |
63eb9546 JFM |
429 | { |
430 | struct usb_host_endpoint *ep; | |
431 | int i, attr; | |
432 | ||
433 | epaddr |= USB_DIR_IN; | |
434 | for (i = 0; i < alt->desc.bNumEndpoints; i++) { | |
435 | ep = &alt->endpoint[i]; | |
436 | if (ep->desc.bEndpointAddress == epaddr) { | |
437 | attr = ep->desc.bmAttributes | |
438 | & USB_ENDPOINT_XFERTYPE_MASK; | |
0be01004 | 439 | if (attr == xfer) |
63eb9546 JFM |
440 | return ep; |
441 | break; | |
442 | } | |
443 | } | |
444 | return NULL; | |
445 | } | |
446 | ||
447 | /* | |
219423c1 | 448 | * look for an input (isoc or bulk) endpoint |
63eb9546 JFM |
449 | * |
450 | * The endpoint is defined by the subdriver. | |
451 | * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep). | |
452 | * This routine may be called many times when the bandwidth is too small | |
453 | * (the bandwidth is checked on urb submit). | |
454 | */ | |
0be01004 | 455 | static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
456 | { |
457 | struct usb_interface *intf; | |
458 | struct usb_host_endpoint *ep; | |
459 | int i, ret; | |
460 | ||
461 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
6a7eba24 | 462 | ep = NULL; |
63eb9546 | 463 | i = gspca_dev->alt; /* previous alt setting */ |
95d9142c JFM |
464 | |
465 | /* try isoc */ | |
63eb9546 | 466 | while (--i > 0) { /* alt 0 is unusable */ |
0be01004 JFM |
467 | ep = alt_xfer(&intf->altsetting[i], |
468 | gspca_dev->cam.epaddr, | |
95d9142c | 469 | USB_ENDPOINT_XFER_ISOC); |
63eb9546 JFM |
470 | if (ep) |
471 | break; | |
472 | } | |
95d9142c JFM |
473 | |
474 | /* if no isoc, try bulk */ | |
6a7eba24 | 475 | if (ep == NULL) { |
95d9142c JFM |
476 | ep = alt_xfer(&intf->altsetting[0], |
477 | gspca_dev->cam.epaddr, | |
478 | USB_ENDPOINT_XFER_BULK); | |
479 | if (ep == NULL) { | |
480 | err("no transfer endpoint found"); | |
481 | return NULL; | |
482 | } | |
63eb9546 | 483 | } |
0be01004 | 484 | PDEBUG(D_STREAM, "use alt %d ep 0x%02x", |
63eb9546 | 485 | i, ep->desc.bEndpointAddress); |
95d9142c JFM |
486 | if (i > 0) { |
487 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i); | |
488 | if (ret < 0) { | |
489 | err("set interface err %d", ret); | |
490 | return NULL; | |
491 | } | |
63eb9546 | 492 | } |
d43fa32f | 493 | gspca_dev->alt = i; /* memorize the current alt setting */ |
63eb9546 JFM |
494 | return ep; |
495 | } | |
496 | ||
497 | /* | |
0be01004 | 498 | * create the URBs for image transfer |
63eb9546 JFM |
499 | */ |
500 | static int create_urbs(struct gspca_dev *gspca_dev, | |
501 | struct usb_host_endpoint *ep) | |
502 | { | |
503 | struct urb *urb; | |
d43fa32f | 504 | int n, nurbs, i, psize, npkt, bsize; |
63eb9546 JFM |
505 | |
506 | /* calculate the packet size and the number of packets */ | |
63eb9546 | 507 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
d43fa32f | 508 | |
95d9142c JFM |
509 | if (gspca_dev->alt != 0) { /* isoc */ |
510 | ||
511 | /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ | |
512 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); | |
0be01004 JFM |
513 | npkt = ISO_MAX_SIZE / psize; |
514 | if (npkt > ISO_MAX_PKT) | |
515 | npkt = ISO_MAX_PKT; | |
516 | bsize = psize * npkt; | |
517 | PDEBUG(D_STREAM, | |
518 | "isoc %d pkts size %d = bsize:%d", | |
519 | npkt, psize, bsize); | |
51977a8d | 520 | nurbs = DEF_NURBS; |
95d9142c | 521 | } else { /* bulk */ |
0be01004 | 522 | npkt = 0; |
95d9142c JFM |
523 | bsize = gspca_dev->cam. bulk_size; |
524 | if (bsize == 0) | |
525 | bsize = psize; | |
0be01004 | 526 | PDEBUG(D_STREAM, "bulk bsize:%d", bsize); |
51977a8d | 527 | nurbs = 1; |
0be01004 JFM |
528 | } |
529 | ||
6a7eba24 | 530 | gspca_dev->nurbs = nurbs; |
d43fa32f | 531 | for (n = 0; n < nurbs; n++) { |
63eb9546 JFM |
532 | urb = usb_alloc_urb(npkt, GFP_KERNEL); |
533 | if (!urb) { | |
534 | err("usb_alloc_urb failed"); | |
0d0548e6 | 535 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
536 | return -ENOMEM; |
537 | } | |
4aa0d037 | 538 | urb->transfer_buffer = usb_buffer_alloc(gspca_dev->dev, |
63eb9546 JFM |
539 | bsize, |
540 | GFP_KERNEL, | |
541 | &urb->transfer_dma); | |
542 | ||
4aa0d037 | 543 | if (urb->transfer_buffer == NULL) { |
63eb9546 | 544 | usb_free_urb(urb); |
63eb9546 | 545 | err("usb_buffer_urb failed"); |
0d0548e6 | 546 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
547 | return -ENOMEM; |
548 | } | |
4aa0d037 | 549 | gspca_dev->urb[n] = urb; |
63eb9546 JFM |
550 | urb->dev = gspca_dev->dev; |
551 | urb->context = gspca_dev; | |
63eb9546 | 552 | urb->transfer_buffer_length = bsize; |
0be01004 JFM |
553 | if (npkt != 0) { /* ISOC */ |
554 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, | |
555 | ep->desc.bEndpointAddress); | |
6c49da7f FZ |
556 | urb->transfer_flags = URB_ISO_ASAP |
557 | | URB_NO_TRANSFER_DMA_MAP; | |
0be01004 JFM |
558 | urb->interval = ep->desc.bInterval; |
559 | urb->complete = isoc_irq; | |
560 | urb->number_of_packets = npkt; | |
561 | for (i = 0; i < npkt; i++) { | |
562 | urb->iso_frame_desc[i].length = psize; | |
563 | urb->iso_frame_desc[i].offset = psize * i; | |
564 | } | |
565 | } else { /* bulk */ | |
566 | urb->pipe = usb_rcvbulkpipe(gspca_dev->dev, | |
567 | ep->desc.bEndpointAddress), | |
6c49da7f | 568 | urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; |
0be01004 | 569 | urb->complete = bulk_irq; |
63eb9546 JFM |
570 | } |
571 | } | |
572 | return 0; | |
573 | } | |
574 | ||
575 | /* | |
576 | * start the USB transfer | |
577 | */ | |
578 | static int gspca_init_transfer(struct gspca_dev *gspca_dev) | |
579 | { | |
63eb9546 JFM |
580 | struct usb_host_endpoint *ep; |
581 | int n, ret; | |
582 | ||
e2997a72 HG |
583 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
584 | return -ERESTARTSYS; | |
63eb9546 | 585 | |
d43fa32f JFM |
586 | /* set the higher alternate setting and |
587 | * loop until urb submit succeeds */ | |
588 | gspca_dev->alt = gspca_dev->nbalt; | |
63eb9546 | 589 | for (;;) { |
d43fa32f | 590 | PDEBUG(D_STREAM, "init transfer alt %d", gspca_dev->alt); |
0be01004 | 591 | ep = get_ep(gspca_dev); |
63eb9546 JFM |
592 | if (ep == NULL) { |
593 | ret = -EIO; | |
594 | goto out; | |
595 | } | |
596 | ret = create_urbs(gspca_dev, ep); | |
597 | if (ret < 0) | |
598 | goto out; | |
599 | ||
600 | /* start the cam */ | |
72ab97ce JFM |
601 | ret = gspca_dev->sd_desc->start(gspca_dev); |
602 | if (ret < 0) { | |
603 | destroy_urbs(gspca_dev); | |
604 | goto out; | |
605 | } | |
63eb9546 JFM |
606 | gspca_dev->streaming = 1; |
607 | atomic_set(&gspca_dev->nevent, 0); | |
608 | ||
219423c1 | 609 | /* bulk transfers are started by the subdriver */ |
95d9142c | 610 | if (gspca_dev->alt == 0) |
51977a8d JFM |
611 | break; |
612 | ||
63eb9546 | 613 | /* submit the URBs */ |
d43fa32f | 614 | for (n = 0; n < gspca_dev->nurbs; n++) { |
4aa0d037 | 615 | ret = usb_submit_urb(gspca_dev->urb[n], GFP_KERNEL); |
63eb9546 JFM |
616 | if (ret < 0) { |
617 | PDEBUG(D_ERR|D_STREAM, | |
618 | "usb_submit_urb [%d] err %d", n, ret); | |
e2997a72 | 619 | gspca_dev->streaming = 0; |
d43fa32f | 620 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
621 | if (ret == -ENOSPC) |
622 | break; /* try the previous alt */ | |
623 | goto out; | |
624 | } | |
625 | } | |
626 | if (ret >= 0) | |
627 | break; | |
628 | } | |
629 | out: | |
630 | mutex_unlock(&gspca_dev->usb_lock); | |
631 | return ret; | |
632 | } | |
633 | ||
634 | static int gspca_set_alt0(struct gspca_dev *gspca_dev) | |
635 | { | |
636 | int ret; | |
637 | ||
638 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0); | |
639 | if (ret < 0) | |
640 | PDEBUG(D_ERR|D_STREAM, "set interface 0 err %d", ret); | |
641 | return ret; | |
642 | } | |
643 | ||
219423c1 | 644 | /* Note: both the queue and the usb locks should be held when calling this */ |
63eb9546 JFM |
645 | static void gspca_stream_off(struct gspca_dev *gspca_dev) |
646 | { | |
63eb9546 | 647 | gspca_dev->streaming = 0; |
d43fa32f | 648 | atomic_set(&gspca_dev->nevent, 0); |
98522a7b JFM |
649 | if (gspca_dev->present |
650 | && gspca_dev->sd_desc->stopN) | |
651 | gspca_dev->sd_desc->stopN(gspca_dev); | |
652 | destroy_urbs(gspca_dev); | |
653 | gspca_set_alt0(gspca_dev); | |
654 | if (gspca_dev->sd_desc->stop0) | |
655 | gspca_dev->sd_desc->stop0(gspca_dev); | |
656 | PDEBUG(D_STREAM, "stream off OK"); | |
63eb9546 JFM |
657 | } |
658 | ||
d43fa32f | 659 | static void gspca_set_default_mode(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
660 | { |
661 | int i; | |
662 | ||
663 | i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ | |
664 | gspca_dev->curr_mode = i; | |
665 | gspca_dev->width = gspca_dev->cam.cam_mode[i].width; | |
666 | gspca_dev->height = gspca_dev->cam.cam_mode[i].height; | |
c2446b3e | 667 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
668 | } |
669 | ||
670 | static int wxh_to_mode(struct gspca_dev *gspca_dev, | |
671 | int width, int height) | |
672 | { | |
673 | int i; | |
674 | ||
d43fa32f JFM |
675 | for (i = gspca_dev->cam.nmodes; --i > 0; ) { |
676 | if (width >= gspca_dev->cam.cam_mode[i].width | |
677 | && height >= gspca_dev->cam.cam_mode[i].height) | |
63eb9546 JFM |
678 | break; |
679 | } | |
63eb9546 JFM |
680 | return i; |
681 | } | |
682 | ||
63eb9546 JFM |
683 | /* |
684 | * search a mode with the right pixel format | |
685 | */ | |
686 | static int gspca_get_mode(struct gspca_dev *gspca_dev, | |
687 | int mode, | |
688 | int pixfmt) | |
689 | { | |
690 | int modeU, modeD; | |
691 | ||
692 | modeU = modeD = mode; | |
693 | while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { | |
694 | if (--modeD >= 0) { | |
c2446b3e JFM |
695 | if (gspca_dev->cam.cam_mode[modeD].pixelformat |
696 | == pixfmt) | |
63eb9546 JFM |
697 | return modeD; |
698 | } | |
699 | if (++modeU < gspca_dev->cam.nmodes) { | |
c2446b3e JFM |
700 | if (gspca_dev->cam.cam_mode[modeU].pixelformat |
701 | == pixfmt) | |
63eb9546 JFM |
702 | return modeU; |
703 | } | |
704 | } | |
705 | return -EINVAL; | |
706 | } | |
707 | ||
e078770a | 708 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
709 | struct v4l2_fmtdesc *fmtdesc) |
710 | { | |
711 | struct gspca_dev *gspca_dev = priv; | |
6a7eba24 | 712 | int i, j, index; |
63eb9546 JFM |
713 | __u32 fmt_tb[8]; |
714 | ||
63eb9546 JFM |
715 | /* give an index to each format */ |
716 | index = 0; | |
717 | j = 0; | |
718 | for (i = gspca_dev->cam.nmodes; --i >= 0; ) { | |
c2446b3e | 719 | fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
720 | j = 0; |
721 | for (;;) { | |
722 | if (fmt_tb[j] == fmt_tb[index]) | |
723 | break; | |
724 | j++; | |
725 | } | |
726 | if (j == index) { | |
727 | if (fmtdesc->index == index) | |
728 | break; /* new format */ | |
729 | index++; | |
730 | if (index >= sizeof fmt_tb / sizeof fmt_tb[0]) | |
731 | return -EINVAL; | |
732 | } | |
733 | } | |
734 | if (i < 0) | |
735 | return -EINVAL; /* no more format */ | |
736 | ||
63eb9546 JFM |
737 | fmtdesc->pixelformat = fmt_tb[index]; |
738 | if (gspca_is_compressed(fmt_tb[index])) | |
739 | fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; | |
d43fa32f | 740 | fmtdesc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
63eb9546 JFM |
741 | fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; |
742 | fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; | |
743 | fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; | |
744 | fmtdesc->description[3] = fmtdesc->pixelformat >> 24; | |
745 | fmtdesc->description[4] = '\0'; | |
746 | return 0; | |
747 | } | |
748 | ||
e078770a | 749 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
750 | struct v4l2_format *fmt) |
751 | { | |
752 | struct gspca_dev *gspca_dev = priv; | |
c2446b3e | 753 | int mode; |
63eb9546 | 754 | |
6a7eba24 JFM |
755 | if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
756 | return -EINVAL; | |
c2446b3e JFM |
757 | mode = gspca_dev->curr_mode; |
758 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], | |
759 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
760 | return 0; |
761 | } | |
762 | ||
e078770a | 763 | static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
764 | struct v4l2_format *fmt) |
765 | { | |
24c530b4 | 766 | int w, h, mode, mode2; |
63eb9546 | 767 | |
6a7eba24 JFM |
768 | if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
769 | return -EINVAL; | |
4aa0d037 JFM |
770 | w = fmt->fmt.pix.width; |
771 | h = fmt->fmt.pix.height; | |
d43fa32f | 772 | |
335b3f88 | 773 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
774 | if (gspca_debug & D_CONF) |
775 | PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h); | |
776 | #endif | |
777 | /* search the closest mode for width and height */ | |
778 | mode = wxh_to_mode(gspca_dev, w, h); | |
779 | ||
780 | /* OK if right palette */ | |
c2446b3e JFM |
781 | if (gspca_dev->cam.cam_mode[mode].pixelformat |
782 | != fmt->fmt.pix.pixelformat) { | |
63eb9546 JFM |
783 | |
784 | /* else, search the closest mode with the same pixel format */ | |
785 | mode2 = gspca_get_mode(gspca_dev, mode, | |
786 | fmt->fmt.pix.pixelformat); | |
c2446b3e | 787 | if (mode2 >= 0) |
63eb9546 | 788 | mode = mode2; |
c2446b3e JFM |
789 | /* else |
790 | ; * no chance, return this mode */ | |
63eb9546 | 791 | } |
c2446b3e JFM |
792 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], |
793 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
794 | return mode; /* used when s_fmt */ |
795 | } | |
796 | ||
e078770a | 797 | static int vidioc_try_fmt_vid_cap(struct file *file, |
63eb9546 JFM |
798 | void *priv, |
799 | struct v4l2_format *fmt) | |
800 | { | |
4aa0d037 | 801 | struct gspca_dev *gspca_dev = priv; |
63eb9546 JFM |
802 | int ret; |
803 | ||
e078770a | 804 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
805 | if (ret < 0) |
806 | return ret; | |
807 | return 0; | |
808 | } | |
809 | ||
e078770a | 810 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
811 | struct v4l2_format *fmt) |
812 | { | |
813 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 814 | int ret; |
63eb9546 | 815 | |
e2997a72 HG |
816 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
817 | return -ERESTARTSYS; | |
d43fa32f | 818 | |
e078770a | 819 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
820 | if (ret < 0) |
821 | goto out; | |
822 | ||
d43fa32f JFM |
823 | if (gspca_dev->nframes != 0 |
824 | && fmt->fmt.pix.sizeimage > gspca_dev->frsz) { | |
825 | ret = -EINVAL; | |
826 | goto out; | |
827 | } | |
828 | ||
50a871fe JFM |
829 | if (ret == gspca_dev->curr_mode) { |
830 | ret = 0; | |
63eb9546 | 831 | goto out; /* same mode */ |
50a871fe | 832 | } |
d43fa32f JFM |
833 | |
834 | if (gspca_dev->streaming) { | |
835 | ret = -EBUSY; | |
836 | goto out; | |
e2997a72 | 837 | } |
4aa0d037 JFM |
838 | gspca_dev->width = fmt->fmt.pix.width; |
839 | gspca_dev->height = fmt->fmt.pix.height; | |
63eb9546 JFM |
840 | gspca_dev->pixfmt = fmt->fmt.pix.pixelformat; |
841 | gspca_dev->curr_mode = ret; | |
d43fa32f | 842 | |
d43fa32f | 843 | ret = 0; |
63eb9546 JFM |
844 | out: |
845 | mutex_unlock(&gspca_dev->queue_lock); | |
846 | return ret; | |
847 | } | |
848 | ||
6b060ffe FZ |
849 | static void gspca_delete(struct kref *kref) |
850 | { | |
851 | struct gspca_dev *gspca_dev = container_of(kref, struct gspca_dev, kref); | |
852 | ||
853 | PDEBUG(D_STREAM, "device deleted"); | |
854 | ||
855 | kfree(gspca_dev->usb_buf); | |
856 | kfree(gspca_dev); | |
857 | } | |
858 | ||
63eb9546 JFM |
859 | static int dev_open(struct inode *inode, struct file *file) |
860 | { | |
861 | struct gspca_dev *gspca_dev; | |
862 | int ret; | |
863 | ||
d43fa32f | 864 | PDEBUG(D_STREAM, "%s open", current->comm); |
e07a1d8a | 865 | gspca_dev = video_drvdata(file); |
e2997a72 HG |
866 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
867 | return -ERESTARTSYS; | |
63eb9546 JFM |
868 | if (!gspca_dev->present) { |
869 | ret = -ENODEV; | |
870 | goto out; | |
871 | } | |
872 | ||
012d6b02 | 873 | if (gspca_dev->users > 4) { /* (arbitrary value) */ |
63eb9546 JFM |
874 | ret = -EBUSY; |
875 | goto out; | |
876 | } | |
5c4fa002 JFM |
877 | |
878 | /* protect the subdriver against rmmod */ | |
879 | if (!try_module_get(gspca_dev->module)) { | |
880 | ret = -ENODEV; | |
881 | goto out; | |
882 | } | |
883 | ||
63eb9546 | 884 | gspca_dev->users++; |
6b060ffe FZ |
885 | |
886 | /* one more user */ | |
887 | kref_get(&gspca_dev->kref); | |
888 | ||
63eb9546 | 889 | file->private_data = gspca_dev; |
335b3f88 | 890 | #ifdef GSPCA_DEBUG |
63eb9546 | 891 | /* activate the v4l2 debug */ |
d43fa32f | 892 | if (gspca_debug & D_V4L2) |
e07a1d8a | 893 | gspca_dev->vdev->debug |= V4L2_DEBUG_IOCTL |
9de436cf | 894 | | V4L2_DEBUG_IOCTL_ARG; |
63eb9546 | 895 | else |
e07a1d8a | 896 | gspca_dev->vdev->debug &= ~(V4L2_DEBUG_IOCTL |
9de436cf | 897 | | V4L2_DEBUG_IOCTL_ARG); |
63eb9546 | 898 | #endif |
012d6b02 | 899 | ret = 0; |
63eb9546 JFM |
900 | out: |
901 | mutex_unlock(&gspca_dev->queue_lock); | |
902 | if (ret != 0) | |
903 | PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret); | |
904 | else | |
d43fa32f | 905 | PDEBUG(D_STREAM, "open done"); |
63eb9546 JFM |
906 | return ret; |
907 | } | |
908 | ||
909 | static int dev_close(struct inode *inode, struct file *file) | |
910 | { | |
911 | struct gspca_dev *gspca_dev = file->private_data; | |
912 | ||
d43fa32f | 913 | PDEBUG(D_STREAM, "%s close", current->comm); |
e2997a72 HG |
914 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
915 | return -ERESTARTSYS; | |
916 | gspca_dev->users--; | |
e2997a72 | 917 | |
5b77ae77 | 918 | /* if the file did the capture, free the streaming resources */ |
4aa0d037 | 919 | if (gspca_dev->capt_file == file) { |
a1e8288b JFM |
920 | if (gspca_dev->streaming) { |
921 | mutex_lock(&gspca_dev->usb_lock); | |
922 | gspca_stream_off(gspca_dev); | |
923 | mutex_unlock(&gspca_dev->usb_lock); | |
924 | } | |
4aa0d037 | 925 | frame_free(gspca_dev); |
efab8211 | 926 | gspca_dev->capt_file = NULL; |
d43fa32f | 927 | gspca_dev->memory = GSPCA_MEMORY_NO; |
4aa0d037 | 928 | } |
d43fa32f | 929 | file->private_data = NULL; |
5c4fa002 | 930 | module_put(gspca_dev->module); |
63eb9546 | 931 | mutex_unlock(&gspca_dev->queue_lock); |
6b060ffe | 932 | |
d43fa32f | 933 | PDEBUG(D_STREAM, "close done"); |
6b060ffe FZ |
934 | |
935 | kref_put(&gspca_dev->kref, gspca_delete); | |
936 | ||
63eb9546 JFM |
937 | return 0; |
938 | } | |
939 | ||
940 | static int vidioc_querycap(struct file *file, void *priv, | |
941 | struct v4l2_capability *cap) | |
942 | { | |
943 | struct gspca_dev *gspca_dev = priv; | |
944 | ||
63eb9546 JFM |
945 | memset(cap, 0, sizeof *cap); |
946 | strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver); | |
c6edaf16 JFM |
947 | if (gspca_dev->dev->product != NULL) { |
948 | strncpy(cap->card, gspca_dev->dev->product, | |
949 | sizeof cap->card); | |
950 | } else { | |
951 | snprintf(cap->card, sizeof cap->card, | |
952 | "USB Camera (%04x:%04x)", | |
953 | le16_to_cpu(gspca_dev->dev->descriptor.idVendor), | |
954 | le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); | |
955 | } | |
63eb9546 JFM |
956 | strncpy(cap->bus_info, gspca_dev->dev->bus->bus_name, |
957 | sizeof cap->bus_info); | |
958 | cap->version = DRIVER_VERSION_NUMBER; | |
959 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | |
960 | | V4L2_CAP_STREAMING | |
961 | | V4L2_CAP_READWRITE; | |
962 | return 0; | |
963 | } | |
964 | ||
965 | static int vidioc_queryctrl(struct file *file, void *priv, | |
966 | struct v4l2_queryctrl *q_ctrl) | |
967 | { | |
968 | struct gspca_dev *gspca_dev = priv; | |
f50ba1be | 969 | int i, ix; |
6a7eba24 JFM |
970 | u32 id; |
971 | ||
f50ba1be | 972 | ix = -1; |
6a7eba24 JFM |
973 | id = q_ctrl->id; |
974 | if (id & V4L2_CTRL_FLAG_NEXT_CTRL) { | |
975 | id &= V4L2_CTRL_ID_MASK; | |
976 | id++; | |
977 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
0f523c2f | 978 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id) |
f50ba1be JFM |
979 | continue; |
980 | if (ix < 0) { | |
981 | ix = i; | |
982 | continue; | |
6a7eba24 | 983 | } |
f50ba1be JFM |
984 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id |
985 | > gspca_dev->sd_desc->ctrls[ix].qctrl.id) | |
986 | continue; | |
987 | ix = i; | |
6a7eba24 | 988 | } |
6a7eba24 | 989 | } |
63eb9546 | 990 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { |
6a7eba24 | 991 | if (id == gspca_dev->sd_desc->ctrls[i].qctrl.id) { |
f50ba1be JFM |
992 | ix = i; |
993 | break; | |
63eb9546 JFM |
994 | } |
995 | } | |
f50ba1be JFM |
996 | if (ix < 0) |
997 | return -EINVAL; | |
998 | memcpy(q_ctrl, &gspca_dev->sd_desc->ctrls[ix].qctrl, | |
999 | sizeof *q_ctrl); | |
1000 | if (gspca_dev->ctrl_dis & (1 << ix)) | |
1001 | q_ctrl->flags |= V4L2_CTRL_FLAG_DISABLED; | |
1002 | return 0; | |
63eb9546 JFM |
1003 | } |
1004 | ||
1005 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
1006 | struct v4l2_control *ctrl) | |
1007 | { | |
1008 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 1009 | const struct ctrl *ctrls; |
63eb9546 JFM |
1010 | int i, ret; |
1011 | ||
63eb9546 JFM |
1012 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; |
1013 | i < gspca_dev->sd_desc->nctrls; | |
1014 | i++, ctrls++) { | |
1015 | if (ctrl->id != ctrls->qctrl.id) | |
1016 | continue; | |
0f523c2f HG |
1017 | if (gspca_dev->ctrl_dis & (1 << i)) |
1018 | return -EINVAL; | |
63eb9546 | 1019 | if (ctrl->value < ctrls->qctrl.minimum |
fcf5cb24 | 1020 | || ctrl->value > ctrls->qctrl.maximum) |
63eb9546 JFM |
1021 | return -ERANGE; |
1022 | PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value); | |
e2997a72 HG |
1023 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1024 | return -ERESTARTSYS; | |
63eb9546 JFM |
1025 | ret = ctrls->set(gspca_dev, ctrl->value); |
1026 | mutex_unlock(&gspca_dev->usb_lock); | |
1027 | return ret; | |
1028 | } | |
1029 | return -EINVAL; | |
1030 | } | |
1031 | ||
1032 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
1033 | struct v4l2_control *ctrl) | |
1034 | { | |
1035 | struct gspca_dev *gspca_dev = priv; | |
1036 | ||
a5ae2062 | 1037 | const struct ctrl *ctrls; |
63eb9546 JFM |
1038 | int i, ret; |
1039 | ||
1040 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; | |
1041 | i < gspca_dev->sd_desc->nctrls; | |
1042 | i++, ctrls++) { | |
1043 | if (ctrl->id != ctrls->qctrl.id) | |
1044 | continue; | |
0f523c2f HG |
1045 | if (gspca_dev->ctrl_dis & (1 << i)) |
1046 | return -EINVAL; | |
e2997a72 HG |
1047 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1048 | return -ERESTARTSYS; | |
63eb9546 JFM |
1049 | ret = ctrls->get(gspca_dev, &ctrl->value); |
1050 | mutex_unlock(&gspca_dev->usb_lock); | |
1051 | return ret; | |
1052 | } | |
1053 | return -EINVAL; | |
1054 | } | |
1055 | ||
1056 | static int vidioc_querymenu(struct file *file, void *priv, | |
1057 | struct v4l2_querymenu *qmenu) | |
1058 | { | |
1059 | struct gspca_dev *gspca_dev = priv; | |
1060 | ||
1061 | if (!gspca_dev->sd_desc->querymenu) | |
1062 | return -EINVAL; | |
1063 | return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu); | |
1064 | } | |
1065 | ||
1066 | static int vidioc_enum_input(struct file *file, void *priv, | |
1067 | struct v4l2_input *input) | |
1068 | { | |
1069 | struct gspca_dev *gspca_dev = priv; | |
1070 | ||
1071 | if (input->index != 0) | |
1072 | return -EINVAL; | |
1073 | memset(input, 0, sizeof *input); | |
1074 | input->type = V4L2_INPUT_TYPE_CAMERA; | |
1075 | strncpy(input->name, gspca_dev->sd_desc->name, | |
1076 | sizeof input->name); | |
1077 | return 0; | |
1078 | } | |
1079 | ||
1080 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) | |
1081 | { | |
1082 | *i = 0; | |
1083 | return 0; | |
1084 | } | |
1085 | ||
1086 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) | |
1087 | { | |
1088 | if (i > 0) | |
1089 | return -EINVAL; | |
1090 | return (0); | |
1091 | } | |
1092 | ||
1093 | static int vidioc_reqbufs(struct file *file, void *priv, | |
1094 | struct v4l2_requestbuffers *rb) | |
1095 | { | |
1096 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 1097 | int i, ret = 0; |
63eb9546 | 1098 | |
63eb9546 JFM |
1099 | if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1100 | return -EINVAL; | |
d43fa32f | 1101 | switch (rb->memory) { |
5b77ae77 | 1102 | case GSPCA_MEMORY_READ: /* (internal call) */ |
d43fa32f | 1103 | case V4L2_MEMORY_MMAP: |
d43fa32f | 1104 | case V4L2_MEMORY_USERPTR: |
6a7eba24 | 1105 | break; |
d43fa32f | 1106 | default: |
63eb9546 | 1107 | return -EINVAL; |
d43fa32f | 1108 | } |
e2997a72 HG |
1109 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1110 | return -ERESTARTSYS; | |
d43fa32f | 1111 | |
5b77ae77 JFM |
1112 | if (gspca_dev->memory != GSPCA_MEMORY_NO |
1113 | && gspca_dev->memory != rb->memory) { | |
4aa0d037 JFM |
1114 | ret = -EBUSY; |
1115 | goto out; | |
1116 | } | |
d43fa32f | 1117 | |
5b77ae77 JFM |
1118 | /* only one file may do the capture */ |
1119 | if (gspca_dev->capt_file != NULL | |
1120 | && gspca_dev->capt_file != file) { | |
1121 | ret = -EBUSY; | |
1122 | goto out; | |
1123 | } | |
1124 | ||
1125 | /* if allocated, the buffers must not be mapped */ | |
1126 | for (i = 0; i < gspca_dev->nframes; i++) { | |
1127 | if (gspca_dev->frame[i].vma_use_count) { | |
ac0d6df6 JFM |
1128 | ret = -EBUSY; |
1129 | goto out; | |
1130 | } | |
5b77ae77 JFM |
1131 | } |
1132 | ||
1133 | /* stop streaming */ | |
1134 | if (gspca_dev->streaming) { | |
1135 | mutex_lock(&gspca_dev->usb_lock); | |
1136 | gspca_stream_off(gspca_dev); | |
1137 | mutex_unlock(&gspca_dev->usb_lock); | |
1138 | } | |
1139 | ||
1140 | /* free the previous allocated buffers, if any */ | |
1141 | if (gspca_dev->nframes != 0) { | |
1142 | frame_free(gspca_dev); | |
1143 | gspca_dev->capt_file = NULL; | |
1144 | } | |
1145 | if (rb->count == 0) /* unrequest */ | |
1146 | goto out; | |
1147 | gspca_dev->memory = rb->memory; | |
1148 | ret = frame_alloc(gspca_dev, rb->count); | |
1149 | if (ret == 0) { | |
1150 | rb->count = gspca_dev->nframes; | |
1151 | gspca_dev->capt_file = file; | |
4aa0d037 JFM |
1152 | } |
1153 | out: | |
63eb9546 JFM |
1154 | mutex_unlock(&gspca_dev->queue_lock); |
1155 | PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count); | |
1156 | return ret; | |
1157 | } | |
1158 | ||
1159 | static int vidioc_querybuf(struct file *file, void *priv, | |
1160 | struct v4l2_buffer *v4l2_buf) | |
1161 | { | |
1162 | struct gspca_dev *gspca_dev = priv; | |
1163 | struct gspca_frame *frame; | |
1164 | ||
63eb9546 JFM |
1165 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE |
1166 | || v4l2_buf->index < 0 | |
1167 | || v4l2_buf->index >= gspca_dev->nframes) | |
1168 | return -EINVAL; | |
1169 | ||
1170 | frame = &gspca_dev->frame[v4l2_buf->index]; | |
1171 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1172 | return 0; | |
1173 | } | |
1174 | ||
1175 | static int vidioc_streamon(struct file *file, void *priv, | |
1176 | enum v4l2_buf_type buf_type) | |
1177 | { | |
1178 | struct gspca_dev *gspca_dev = priv; | |
1179 | int ret; | |
1180 | ||
63eb9546 JFM |
1181 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1182 | return -EINVAL; | |
e2997a72 HG |
1183 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1184 | return -ERESTARTSYS; | |
63eb9546 JFM |
1185 | if (!gspca_dev->present) { |
1186 | ret = -ENODEV; | |
1187 | goto out; | |
1188 | } | |
1189 | if (gspca_dev->nframes == 0) { | |
1190 | ret = -EINVAL; | |
1191 | goto out; | |
1192 | } | |
1193 | if (!gspca_dev->streaming) { | |
1194 | ret = gspca_init_transfer(gspca_dev); | |
1195 | if (ret < 0) | |
1196 | goto out; | |
1197 | } | |
335b3f88 | 1198 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
1199 | if (gspca_debug & D_STREAM) { |
1200 | PDEBUG_MODE("stream on OK", | |
1201 | gspca_dev->pixfmt, | |
1202 | gspca_dev->width, | |
1203 | gspca_dev->height); | |
1204 | } | |
1205 | #endif | |
e2997a72 | 1206 | ret = 0; |
63eb9546 JFM |
1207 | out: |
1208 | mutex_unlock(&gspca_dev->queue_lock); | |
1209 | return ret; | |
1210 | } | |
1211 | ||
1212 | static int vidioc_streamoff(struct file *file, void *priv, | |
1213 | enum v4l2_buf_type buf_type) | |
1214 | { | |
1215 | struct gspca_dev *gspca_dev = priv; | |
5b77ae77 | 1216 | int i, ret; |
63eb9546 | 1217 | |
63eb9546 JFM |
1218 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1219 | return -EINVAL; | |
4aa0d037 JFM |
1220 | if (!gspca_dev->streaming) |
1221 | return 0; | |
1222 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1223 | return -ERESTARTSYS; | |
5b77ae77 JFM |
1224 | |
1225 | /* stop streaming */ | |
4aa0d037 JFM |
1226 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { |
1227 | ret = -ERESTARTSYS; | |
1228 | goto out; | |
63eb9546 | 1229 | } |
4aa0d037 | 1230 | gspca_stream_off(gspca_dev); |
4aa0d037 | 1231 | mutex_unlock(&gspca_dev->usb_lock); |
5b77ae77 JFM |
1232 | |
1233 | /* empty the application queues */ | |
1234 | for (i = 0; i < gspca_dev->nframes; i++) | |
1235 | gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS; | |
1236 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
1237 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
1238 | gspca_dev->sequence = 0; | |
1239 | atomic_set(&gspca_dev->nevent, 0); | |
1240 | ret = 0; | |
4aa0d037 JFM |
1241 | out: |
1242 | mutex_unlock(&gspca_dev->queue_lock); | |
1243 | return ret; | |
63eb9546 JFM |
1244 | } |
1245 | ||
1246 | static int vidioc_g_jpegcomp(struct file *file, void *priv, | |
1247 | struct v4l2_jpegcompression *jpegcomp) | |
1248 | { | |
1249 | struct gspca_dev *gspca_dev = priv; | |
1250 | int ret; | |
1251 | ||
1252 | if (!gspca_dev->sd_desc->get_jcomp) | |
1253 | return -EINVAL; | |
e2997a72 HG |
1254 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1255 | return -ERESTARTSYS; | |
63eb9546 JFM |
1256 | ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); |
1257 | mutex_unlock(&gspca_dev->usb_lock); | |
1258 | return ret; | |
1259 | } | |
1260 | ||
1261 | static int vidioc_s_jpegcomp(struct file *file, void *priv, | |
1262 | struct v4l2_jpegcompression *jpegcomp) | |
1263 | { | |
1264 | struct gspca_dev *gspca_dev = priv; | |
1265 | int ret; | |
1266 | ||
e2997a72 HG |
1267 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1268 | return -ERESTARTSYS; | |
63eb9546 JFM |
1269 | if (!gspca_dev->sd_desc->set_jcomp) |
1270 | return -EINVAL; | |
1271 | ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); | |
1272 | mutex_unlock(&gspca_dev->usb_lock); | |
1273 | return ret; | |
1274 | } | |
1275 | ||
1276 | static int vidioc_g_parm(struct file *filp, void *priv, | |
1277 | struct v4l2_streamparm *parm) | |
1278 | { | |
1279 | struct gspca_dev *gspca_dev = priv; | |
1280 | ||
6a7eba24 | 1281 | memset(parm, 0, sizeof *parm); |
63eb9546 JFM |
1282 | parm->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
1283 | parm->parm.capture.readbuffers = gspca_dev->nbufread; | |
1284 | return 0; | |
1285 | } | |
1286 | ||
1287 | static int vidioc_s_parm(struct file *filp, void *priv, | |
1288 | struct v4l2_streamparm *parm) | |
1289 | { | |
1290 | struct gspca_dev *gspca_dev = priv; | |
1291 | int n; | |
1292 | ||
63eb9546 JFM |
1293 | n = parm->parm.capture.readbuffers; |
1294 | if (n == 0 || n > GSPCA_MAX_FRAMES) | |
1295 | parm->parm.capture.readbuffers = gspca_dev->nbufread; | |
1296 | else | |
1297 | gspca_dev->nbufread = n; | |
63eb9546 JFM |
1298 | return 0; |
1299 | } | |
1300 | ||
6a7eba24 JFM |
1301 | static int vidioc_s_std(struct file *filp, void *priv, |
1302 | v4l2_std_id *parm) | |
1303 | { | |
1304 | return 0; | |
1305 | } | |
1306 | ||
63eb9546 JFM |
1307 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
1308 | static int vidiocgmbuf(struct file *file, void *priv, | |
1309 | struct video_mbuf *mbuf) | |
1310 | { | |
1311 | struct gspca_dev *gspca_dev = file->private_data; | |
1312 | int i; | |
1313 | ||
1314 | PDEBUG(D_STREAM, "cgmbuf"); | |
1315 | if (gspca_dev->nframes == 0) { | |
63eb9546 | 1316 | int ret; |
6a7eba24 JFM |
1317 | |
1318 | { | |
1319 | struct v4l2_format fmt; | |
1320 | ||
1321 | memset(&fmt, 0, sizeof fmt); | |
1322 | fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1323 | i = gspca_dev->cam.nmodes - 1; /* highest mode */ | |
1324 | fmt.fmt.pix.width = gspca_dev->cam.cam_mode[i].width; | |
1325 | fmt.fmt.pix.height = gspca_dev->cam.cam_mode[i].height; | |
1326 | fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR24; | |
e078770a | 1327 | ret = vidioc_s_fmt_vid_cap(file, priv, &fmt); |
6a7eba24 JFM |
1328 | if (ret != 0) |
1329 | return ret; | |
1330 | } | |
1331 | { | |
1332 | struct v4l2_requestbuffers rb; | |
1333 | ||
1334 | memset(&rb, 0, sizeof rb); | |
1335 | rb.count = 4; | |
1336 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1337 | rb.memory = V4L2_MEMORY_MMAP; | |
1338 | ret = vidioc_reqbufs(file, priv, &rb); | |
1339 | if (ret != 0) | |
1340 | return ret; | |
1341 | } | |
63eb9546 JFM |
1342 | } |
1343 | mbuf->frames = gspca_dev->nframes; | |
1344 | mbuf->size = gspca_dev->frsz * gspca_dev->nframes; | |
1345 | for (i = 0; i < mbuf->frames; i++) | |
1346 | mbuf->offsets[i] = gspca_dev->frame[i].v4l2_buf.m.offset; | |
1347 | return 0; | |
1348 | } | |
1349 | #endif | |
1350 | ||
1351 | static int dev_mmap(struct file *file, struct vm_area_struct *vma) | |
1352 | { | |
1353 | struct gspca_dev *gspca_dev = file->private_data; | |
efab8211 | 1354 | struct gspca_frame *frame; |
63eb9546 JFM |
1355 | struct page *page; |
1356 | unsigned long addr, start, size; | |
1357 | int i, ret; | |
63eb9546 JFM |
1358 | |
1359 | start = vma->vm_start; | |
1360 | size = vma->vm_end - vma->vm_start; | |
1361 | PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size); | |
1362 | ||
e2997a72 HG |
1363 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1364 | return -ERESTARTSYS; | |
63eb9546 JFM |
1365 | if (!gspca_dev->present) { |
1366 | ret = -ENODEV; | |
4aa0d037 JFM |
1367 | goto out; |
1368 | } | |
1369 | if (gspca_dev->capt_file != file) { | |
1370 | ret = -EINVAL; | |
1371 | goto out; | |
63eb9546 JFM |
1372 | } |
1373 | ||
efab8211 | 1374 | frame = NULL; |
63eb9546 JFM |
1375 | for (i = 0; i < gspca_dev->nframes; ++i) { |
1376 | if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) { | |
1377 | PDEBUG(D_STREAM, "mmap bad memory type"); | |
1378 | break; | |
1379 | } | |
1380 | if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT) | |
1381 | == vma->vm_pgoff) { | |
1382 | frame = &gspca_dev->frame[i]; | |
1383 | break; | |
1384 | } | |
1385 | } | |
efab8211 | 1386 | if (frame == NULL) { |
63eb9546 JFM |
1387 | PDEBUG(D_STREAM, "mmap no frame buffer found"); |
1388 | ret = -EINVAL; | |
4aa0d037 | 1389 | goto out; |
63eb9546 JFM |
1390 | } |
1391 | #ifdef CONFIG_VIDEO_V4L1_COMPAT | |
ac0d6df6 JFM |
1392 | /* v4l1 maps all the buffers */ |
1393 | if (i != 0 | |
1394 | || size != frame->v4l2_buf.length * gspca_dev->nframes) | |
63eb9546 | 1395 | #endif |
ac0d6df6 | 1396 | if (size != frame->v4l2_buf.length) { |
63eb9546 JFM |
1397 | PDEBUG(D_STREAM, "mmap bad size"); |
1398 | ret = -EINVAL; | |
4aa0d037 | 1399 | goto out; |
63eb9546 JFM |
1400 | } |
1401 | ||
1402 | /* | |
1403 | * - VM_IO marks the area as being a mmaped region for I/O to a | |
1404 | * device. It also prevents the region from being core dumped. | |
1405 | */ | |
1406 | vma->vm_flags |= VM_IO; | |
1407 | ||
1408 | addr = (unsigned long) frame->data; | |
1409 | while (size > 0) { | |
1410 | page = vmalloc_to_page((void *) addr); | |
1411 | ret = vm_insert_page(vma, start, page); | |
1412 | if (ret < 0) | |
4aa0d037 | 1413 | goto out; |
63eb9546 JFM |
1414 | start += PAGE_SIZE; |
1415 | addr += PAGE_SIZE; | |
1416 | size -= PAGE_SIZE; | |
1417 | } | |
1418 | ||
1419 | vma->vm_ops = &gspca_vm_ops; | |
1420 | vma->vm_private_data = frame; | |
1421 | gspca_vm_open(vma); | |
e2997a72 | 1422 | ret = 0; |
4aa0d037 | 1423 | out: |
63eb9546 JFM |
1424 | mutex_unlock(&gspca_dev->queue_lock); |
1425 | return ret; | |
1426 | } | |
1427 | ||
63eb9546 JFM |
1428 | /* |
1429 | * wait for a video frame | |
1430 | * | |
1431 | * If a frame is ready, its index is returned. | |
1432 | */ | |
d43fa32f | 1433 | static int frame_wait(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1434 | int nonblock_ing) |
1435 | { | |
1436 | struct gspca_frame *frame; | |
1437 | int i, j, ret; | |
1438 | ||
d43fa32f | 1439 | /* check if a frame is ready */ |
63eb9546 JFM |
1440 | i = gspca_dev->fr_o; |
1441 | j = gspca_dev->fr_queue[i]; | |
1442 | frame = &gspca_dev->frame[j]; | |
82643d0e JFM |
1443 | if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) { |
1444 | atomic_dec(&gspca_dev->nevent); | |
63eb9546 | 1445 | goto ok; |
82643d0e | 1446 | } |
63eb9546 JFM |
1447 | if (nonblock_ing) /* no frame yet */ |
1448 | return -EAGAIN; | |
1449 | ||
1450 | /* wait till a frame is ready */ | |
1451 | for (;;) { | |
4aa0d037 JFM |
1452 | ret = wait_event_interruptible_timeout(gspca_dev->wq, |
1453 | atomic_read(&gspca_dev->nevent) > 0, | |
1454 | msecs_to_jiffies(3000)); | |
1455 | if (ret <= 0) { | |
1456 | if (ret < 0) | |
82643d0e JFM |
1457 | return ret; /* interrupt */ |
1458 | return -EIO; /* timeout */ | |
4aa0d037 | 1459 | } |
82643d0e | 1460 | atomic_dec(&gspca_dev->nevent); |
e2997a72 HG |
1461 | if (!gspca_dev->streaming || !gspca_dev->present) |
1462 | return -EIO; | |
63eb9546 JFM |
1463 | i = gspca_dev->fr_o; |
1464 | j = gspca_dev->fr_queue[i]; | |
1465 | frame = &gspca_dev->frame[j]; | |
1466 | if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) | |
1467 | break; | |
1468 | } | |
63eb9546 | 1469 | ok: |
63eb9546 JFM |
1470 | gspca_dev->fr_o = (i + 1) % gspca_dev->nframes; |
1471 | PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d", | |
1472 | gspca_dev->fr_q, | |
1473 | gspca_dev->fr_i, | |
1474 | gspca_dev->fr_o); | |
e2997a72 | 1475 | |
739570bb JFM |
1476 | if (gspca_dev->sd_desc->dq_callback) { |
1477 | mutex_lock(&gspca_dev->usb_lock); | |
e2997a72 | 1478 | gspca_dev->sd_desc->dq_callback(gspca_dev); |
739570bb JFM |
1479 | mutex_unlock(&gspca_dev->usb_lock); |
1480 | } | |
63eb9546 JFM |
1481 | return j; |
1482 | } | |
1483 | ||
1484 | /* | |
1485 | * dequeue a video buffer | |
1486 | * | |
1487 | * If nonblock_ing is false, block until a buffer is available. | |
1488 | */ | |
1489 | static int vidioc_dqbuf(struct file *file, void *priv, | |
1490 | struct v4l2_buffer *v4l2_buf) | |
1491 | { | |
1492 | struct gspca_dev *gspca_dev = priv; | |
1493 | struct gspca_frame *frame; | |
1494 | int i, ret; | |
1495 | ||
1496 | PDEBUG(D_FRAM, "dqbuf"); | |
ac0d6df6 JFM |
1497 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1498 | return -EINVAL; | |
1499 | if (v4l2_buf->memory != gspca_dev->memory) | |
63eb9546 | 1500 | return -EINVAL; |
5b77ae77 JFM |
1501 | |
1502 | /* if not streaming, be sure the application will not loop forever */ | |
1503 | if (!(file->f_flags & O_NONBLOCK) | |
1504 | && !gspca_dev->streaming && gspca_dev->users == 1) | |
63eb9546 JFM |
1505 | return -EINVAL; |
1506 | ||
5b77ae77 JFM |
1507 | /* only the capturing file may dequeue */ |
1508 | if (gspca_dev->capt_file != file) | |
1509 | return -EINVAL; | |
1510 | ||
1511 | /* only one dequeue / read at a time */ | |
63eb9546 JFM |
1512 | if (mutex_lock_interruptible(&gspca_dev->read_lock)) |
1513 | return -ERESTARTSYS; | |
1514 | ||
d43fa32f | 1515 | ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK); |
63eb9546 | 1516 | if (ret < 0) |
4aa0d037 | 1517 | goto out; |
63eb9546 JFM |
1518 | i = ret; /* frame index */ |
1519 | frame = &gspca_dev->frame[i]; | |
ac0d6df6 | 1520 | if (gspca_dev->memory == V4L2_MEMORY_USERPTR) { |
c6eb8eaf | 1521 | if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr, |
ac0d6df6 JFM |
1522 | frame->data, |
1523 | frame->v4l2_buf.bytesused)) { | |
1524 | PDEBUG(D_ERR|D_STREAM, | |
1525 | "dqbuf cp to user failed"); | |
1526 | ret = -EFAULT; | |
1527 | goto out; | |
1528 | } | |
1529 | } | |
63eb9546 JFM |
1530 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; |
1531 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1532 | PDEBUG(D_FRAM, "dqbuf %d", i); | |
1533 | ret = 0; | |
4aa0d037 | 1534 | out: |
63eb9546 JFM |
1535 | mutex_unlock(&gspca_dev->read_lock); |
1536 | return ret; | |
1537 | } | |
1538 | ||
1539 | /* | |
1540 | * queue a video buffer | |
1541 | * | |
1542 | * Attempting to queue a buffer that has already been | |
1543 | * queued will return -EINVAL. | |
1544 | */ | |
1545 | static int vidioc_qbuf(struct file *file, void *priv, | |
1546 | struct v4l2_buffer *v4l2_buf) | |
1547 | { | |
1548 | struct gspca_dev *gspca_dev = priv; | |
1549 | struct gspca_frame *frame; | |
1550 | int i, index, ret; | |
1551 | ||
1552 | PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index); | |
1553 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1554 | return -EINVAL; | |
1555 | ||
5b77ae77 JFM |
1556 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1557 | return -ERESTARTSYS; | |
1558 | ||
63eb9546 JFM |
1559 | index = v4l2_buf->index; |
1560 | if ((unsigned) index >= gspca_dev->nframes) { | |
d43fa32f | 1561 | PDEBUG(D_FRAM, |
63eb9546 | 1562 | "qbuf idx %d >= %d", index, gspca_dev->nframes); |
5b77ae77 JFM |
1563 | ret = -EINVAL; |
1564 | goto out; | |
63eb9546 | 1565 | } |
5b77ae77 | 1566 | if (v4l2_buf->memory != gspca_dev->memory) { |
d43fa32f | 1567 | PDEBUG(D_FRAM, "qbuf bad memory type"); |
5b77ae77 JFM |
1568 | ret = -EINVAL; |
1569 | goto out; | |
63eb9546 | 1570 | } |
e2997a72 | 1571 | |
5b77ae77 | 1572 | frame = &gspca_dev->frame[index]; |
d43fa32f JFM |
1573 | if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) { |
1574 | PDEBUG(D_FRAM, "qbuf bad state"); | |
63eb9546 JFM |
1575 | ret = -EINVAL; |
1576 | goto out; | |
1577 | } | |
1578 | ||
1579 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED; | |
63eb9546 | 1580 | |
d43fa32f | 1581 | if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) { |
63eb9546 JFM |
1582 | frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr; |
1583 | frame->v4l2_buf.length = v4l2_buf->length; | |
1584 | } | |
1585 | ||
1586 | /* put the buffer in the 'queued' queue */ | |
1587 | i = gspca_dev->fr_q; | |
1588 | gspca_dev->fr_queue[i] = index; | |
1589 | gspca_dev->fr_q = (i + 1) % gspca_dev->nframes; | |
1590 | PDEBUG(D_FRAM, "qbuf q:%d i:%d o:%d", | |
1591 | gspca_dev->fr_q, | |
1592 | gspca_dev->fr_i, | |
1593 | gspca_dev->fr_o); | |
1594 | ||
1595 | v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED; | |
1596 | v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE; | |
1597 | ret = 0; | |
1598 | out: | |
1599 | mutex_unlock(&gspca_dev->queue_lock); | |
1600 | return ret; | |
1601 | } | |
1602 | ||
d43fa32f JFM |
1603 | /* |
1604 | * allocate the resources for read() | |
1605 | */ | |
1606 | static int read_alloc(struct gspca_dev *gspca_dev, | |
1607 | struct file *file) | |
63eb9546 | 1608 | { |
63eb9546 | 1609 | struct v4l2_buffer v4l2_buf; |
d43fa32f | 1610 | int i, ret; |
63eb9546 | 1611 | |
d43fa32f | 1612 | PDEBUG(D_STREAM, "read alloc"); |
63eb9546 JFM |
1613 | if (gspca_dev->nframes == 0) { |
1614 | struct v4l2_requestbuffers rb; | |
1615 | ||
1616 | memset(&rb, 0, sizeof rb); | |
1617 | rb.count = gspca_dev->nbufread; | |
1618 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1619 | rb.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1620 | ret = vidioc_reqbufs(file, gspca_dev, &rb); |
1621 | if (ret != 0) { | |
d43fa32f | 1622 | PDEBUG(D_STREAM, "read reqbuf err %d", ret); |
63eb9546 JFM |
1623 | return ret; |
1624 | } | |
1625 | memset(&v4l2_buf, 0, sizeof v4l2_buf); | |
1626 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1627 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1628 | for (i = 0; i < gspca_dev->nbufread; i++) { |
1629 | v4l2_buf.index = i; | |
63eb9546 JFM |
1630 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); |
1631 | if (ret != 0) { | |
1632 | PDEBUG(D_STREAM, "read qbuf err: %d", ret); | |
1633 | return ret; | |
1634 | } | |
1635 | } | |
d43fa32f JFM |
1636 | gspca_dev->memory = GSPCA_MEMORY_READ; |
1637 | } | |
4aa0d037 | 1638 | |
d43fa32f JFM |
1639 | /* start streaming */ |
1640 | ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE); | |
1641 | if (ret != 0) | |
1642 | PDEBUG(D_STREAM, "read streamon err %d", ret); | |
1643 | return ret; | |
1644 | } | |
1645 | ||
1646 | static unsigned int dev_poll(struct file *file, poll_table *wait) | |
1647 | { | |
1648 | struct gspca_dev *gspca_dev = file->private_data; | |
1649 | int i, ret; | |
1650 | ||
1651 | PDEBUG(D_FRAM, "poll"); | |
1652 | ||
1653 | poll_wait(file, &gspca_dev->wq, wait); | |
1654 | if (!gspca_dev->present) | |
1655 | return POLLERR; | |
1656 | ||
5b77ae77 JFM |
1657 | /* if reqbufs is not done, the user would use read() */ |
1658 | if (gspca_dev->nframes == 0) { | |
1659 | if (gspca_dev->memory != GSPCA_MEMORY_NO) | |
1660 | return POLLERR; /* not the 1st time */ | |
d43fa32f | 1661 | ret = read_alloc(gspca_dev, file); |
5b77ae77 JFM |
1662 | if (ret != 0) |
1663 | return POLLERR; | |
63eb9546 JFM |
1664 | } |
1665 | ||
d43fa32f JFM |
1666 | if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) |
1667 | return POLLERR; | |
1668 | if (!gspca_dev->present) { | |
1669 | ret = POLLERR; | |
1670 | goto out; | |
1671 | } | |
1672 | ||
5b77ae77 | 1673 | /* check the next incoming buffer */ |
d43fa32f JFM |
1674 | i = gspca_dev->fr_o; |
1675 | i = gspca_dev->fr_queue[i]; | |
1676 | if (gspca_dev->frame[i].v4l2_buf.flags & V4L2_BUF_FLAG_DONE) | |
1677 | ret = POLLIN | POLLRDNORM; /* something to read */ | |
1678 | else | |
1679 | ret = 0; | |
1680 | out: | |
1681 | mutex_unlock(&gspca_dev->queue_lock); | |
1682 | return ret; | |
1683 | } | |
1684 | ||
1685 | static ssize_t dev_read(struct file *file, char __user *data, | |
1686 | size_t count, loff_t *ppos) | |
1687 | { | |
1688 | struct gspca_dev *gspca_dev = file->private_data; | |
1689 | struct gspca_frame *frame; | |
1690 | struct v4l2_buffer v4l2_buf; | |
1691 | struct timeval timestamp; | |
82643d0e | 1692 | int n, ret, ret2; |
d43fa32f | 1693 | |
a9e11134 | 1694 | PDEBUG(D_FRAM, "read (%zd)", count); |
d43fa32f JFM |
1695 | if (!gspca_dev->present) |
1696 | return -ENODEV; | |
1697 | switch (gspca_dev->memory) { | |
1698 | case GSPCA_MEMORY_NO: /* first time */ | |
1699 | ret = read_alloc(gspca_dev, file); | |
1700 | if (ret != 0) | |
1701 | return ret; | |
1702 | break; | |
1703 | case GSPCA_MEMORY_READ: | |
82643d0e JFM |
1704 | if (gspca_dev->capt_file == file) |
1705 | break; | |
1706 | /* fall thru */ | |
d43fa32f JFM |
1707 | default: |
1708 | return -EINVAL; | |
1709 | } | |
1710 | ||
63eb9546 JFM |
1711 | /* get a frame */ |
1712 | jiffies_to_timeval(get_jiffies_64(), ×tamp); | |
1713 | timestamp.tv_sec--; | |
82643d0e JFM |
1714 | n = 2; |
1715 | for (;;) { | |
63eb9546 JFM |
1716 | memset(&v4l2_buf, 0, sizeof v4l2_buf); |
1717 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1718 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1719 | ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf); |
1720 | if (ret != 0) { | |
1721 | PDEBUG(D_STREAM, "read dqbuf err %d", ret); | |
1722 | return ret; | |
1723 | } | |
1724 | ||
1725 | /* if the process slept for more than 1 second, | |
219423c1 | 1726 | * get a newer frame */ |
63eb9546 | 1727 | frame = &gspca_dev->frame[v4l2_buf.index]; |
82643d0e JFM |
1728 | if (--n < 0) |
1729 | break; /* avoid infinite loop */ | |
63eb9546 JFM |
1730 | if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec) |
1731 | break; | |
1732 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1733 | if (ret != 0) { | |
1734 | PDEBUG(D_STREAM, "read qbuf err %d", ret); | |
1735 | return ret; | |
1736 | } | |
1737 | } | |
1738 | ||
1739 | /* copy the frame */ | |
ac0d6df6 JFM |
1740 | if (count > frame->v4l2_buf.bytesused) |
1741 | count = frame->v4l2_buf.bytesused; | |
63eb9546 JFM |
1742 | ret = copy_to_user(data, frame->data, count); |
1743 | if (ret != 0) { | |
1744 | PDEBUG(D_ERR|D_STREAM, | |
a9e11134 | 1745 | "read cp to user lack %d / %zd", ret, count); |
63eb9546 JFM |
1746 | ret = -EFAULT; |
1747 | goto out; | |
1748 | } | |
1749 | ret = count; | |
1750 | out: | |
1751 | /* in each case, requeue the buffer */ | |
1752 | ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1753 | if (ret2 != 0) | |
1754 | return ret2; | |
1755 | return ret; | |
1756 | } | |
1757 | ||
63eb9546 JFM |
1758 | static struct file_operations dev_fops = { |
1759 | .owner = THIS_MODULE, | |
1760 | .open = dev_open, | |
1761 | .release = dev_close, | |
1762 | .read = dev_read, | |
1763 | .mmap = dev_mmap, | |
1764 | .ioctl = video_ioctl2, | |
6a7eba24 JFM |
1765 | #ifdef CONFIG_COMPAT |
1766 | .compat_ioctl = v4l_compat_ioctl32, | |
1767 | #endif | |
63eb9546 JFM |
1768 | .llseek = no_llseek, |
1769 | .poll = dev_poll, | |
1770 | }; | |
1771 | ||
a399810c | 1772 | static const struct v4l2_ioctl_ops dev_ioctl_ops = { |
63eb9546 JFM |
1773 | .vidioc_querycap = vidioc_querycap, |
1774 | .vidioc_dqbuf = vidioc_dqbuf, | |
1775 | .vidioc_qbuf = vidioc_qbuf, | |
e078770a MCC |
1776 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
1777 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
1778 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
1779 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
63eb9546 JFM |
1780 | .vidioc_streamon = vidioc_streamon, |
1781 | .vidioc_queryctrl = vidioc_queryctrl, | |
1782 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
1783 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
1784 | .vidioc_querymenu = vidioc_querymenu, | |
1785 | .vidioc_enum_input = vidioc_enum_input, | |
1786 | .vidioc_g_input = vidioc_g_input, | |
1787 | .vidioc_s_input = vidioc_s_input, | |
1788 | .vidioc_reqbufs = vidioc_reqbufs, | |
1789 | .vidioc_querybuf = vidioc_querybuf, | |
1790 | .vidioc_streamoff = vidioc_streamoff, | |
1791 | .vidioc_g_jpegcomp = vidioc_g_jpegcomp, | |
1792 | .vidioc_s_jpegcomp = vidioc_s_jpegcomp, | |
1793 | .vidioc_g_parm = vidioc_g_parm, | |
1794 | .vidioc_s_parm = vidioc_s_parm, | |
6a7eba24 | 1795 | .vidioc_s_std = vidioc_s_std, |
63eb9546 JFM |
1796 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
1797 | .vidiocgmbuf = vidiocgmbuf, | |
1798 | #endif | |
1799 | }; | |
1800 | ||
a399810c HV |
1801 | static struct video_device gspca_template = { |
1802 | .name = "gspca main driver", | |
a399810c HV |
1803 | .fops = &dev_fops, |
1804 | .ioctl_ops = &dev_ioctl_ops, | |
e07a1d8a | 1805 | .release = video_device_release, |
a399810c HV |
1806 | .minor = -1, |
1807 | }; | |
1808 | ||
63eb9546 JFM |
1809 | /* |
1810 | * probe and create a new gspca device | |
1811 | * | |
1812 | * This function must be called by the sub-driver when it is | |
1813 | * called for probing a new device. | |
1814 | */ | |
1815 | int gspca_dev_probe(struct usb_interface *intf, | |
1816 | const struct usb_device_id *id, | |
1817 | const struct sd_desc *sd_desc, | |
d43fa32f JFM |
1818 | int dev_size, |
1819 | struct module *module) | |
63eb9546 JFM |
1820 | { |
1821 | struct usb_interface_descriptor *interface; | |
1822 | struct gspca_dev *gspca_dev; | |
1823 | struct usb_device *dev = interface_to_usbdev(intf); | |
1824 | int ret; | |
63eb9546 | 1825 | |
6a7eba24 | 1826 | PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct); |
63eb9546 JFM |
1827 | |
1828 | /* we don't handle multi-config cameras */ | |
1829 | if (dev->descriptor.bNumConfigurations != 1) | |
1830 | return -ENODEV; | |
1831 | interface = &intf->cur_altsetting->desc; | |
1832 | if (interface->bInterfaceNumber > 0) | |
1833 | return -ENODEV; | |
1834 | ||
1835 | /* create the device */ | |
1836 | if (dev_size < sizeof *gspca_dev) | |
1837 | dev_size = sizeof *gspca_dev; | |
1838 | gspca_dev = kzalloc(dev_size, GFP_KERNEL); | |
e293e599 | 1839 | if (!gspca_dev) { |
63eb9546 | 1840 | err("couldn't kzalloc gspca struct"); |
e293e599 | 1841 | return -ENOMEM; |
63eb9546 | 1842 | } |
6b060ffe | 1843 | kref_init(&gspca_dev->kref); |
8295d99e JFM |
1844 | gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL); |
1845 | if (!gspca_dev->usb_buf) { | |
1846 | err("out of memory"); | |
e293e599 | 1847 | ret = -ENOMEM; |
8295d99e JFM |
1848 | goto out; |
1849 | } | |
63eb9546 JFM |
1850 | gspca_dev->dev = dev; |
1851 | gspca_dev->iface = interface->bInterfaceNumber; | |
d43fa32f | 1852 | gspca_dev->nbalt = intf->num_altsetting; |
63eb9546 | 1853 | gspca_dev->sd_desc = sd_desc; |
63eb9546 JFM |
1854 | gspca_dev->nbufread = 2; |
1855 | ||
012d6b02 | 1856 | /* configure the subdriver and initialize the USB device */ |
63eb9546 | 1857 | ret = gspca_dev->sd_desc->config(gspca_dev, id); |
012d6b02 JFM |
1858 | if (ret < 0) |
1859 | goto out; | |
1860 | ret = gspca_dev->sd_desc->init(gspca_dev); | |
63eb9546 JFM |
1861 | if (ret < 0) |
1862 | goto out; | |
1863 | ret = gspca_set_alt0(gspca_dev); | |
1864 | if (ret < 0) | |
1865 | goto out; | |
1866 | gspca_set_default_mode(gspca_dev); | |
1867 | ||
1868 | mutex_init(&gspca_dev->usb_lock); | |
1869 | mutex_init(&gspca_dev->read_lock); | |
1870 | mutex_init(&gspca_dev->queue_lock); | |
1871 | init_waitqueue_head(&gspca_dev->wq); | |
1872 | ||
1873 | /* init video stuff */ | |
e07a1d8a JFM |
1874 | gspca_dev->vdev = video_device_alloc(); |
1875 | memcpy(gspca_dev->vdev, &gspca_template, sizeof gspca_template); | |
1876 | gspca_dev->vdev->parent = &dev->dev; | |
5c4fa002 | 1877 | gspca_dev->module = module; |
ee56a4d3 | 1878 | gspca_dev->present = 1; |
e07a1d8a JFM |
1879 | video_set_drvdata(gspca_dev->vdev, gspca_dev); |
1880 | ret = video_register_device(gspca_dev->vdev, | |
63eb9546 JFM |
1881 | VFL_TYPE_GRABBER, |
1882 | video_nr); | |
1883 | if (ret < 0) { | |
1884 | err("video_register_device err %d", ret); | |
e07a1d8a | 1885 | video_device_release(gspca_dev->vdev); |
63eb9546 JFM |
1886 | goto out; |
1887 | } | |
1888 | ||
63eb9546 JFM |
1889 | usb_set_intfdata(intf, gspca_dev); |
1890 | PDEBUG(D_PROBE, "probe ok"); | |
1891 | return 0; | |
1892 | out: | |
e07a1d8a JFM |
1893 | kfree(gspca_dev->usb_buf); |
1894 | kfree(gspca_dev); | |
63eb9546 JFM |
1895 | return ret; |
1896 | } | |
1897 | EXPORT_SYMBOL(gspca_dev_probe); | |
1898 | ||
1899 | /* | |
1900 | * USB disconnection | |
1901 | * | |
1902 | * This function must be called by the sub-driver | |
1903 | * when the device disconnects, after the specific resources are freed. | |
1904 | */ | |
1905 | void gspca_disconnect(struct usb_interface *intf) | |
1906 | { | |
4aa0d037 | 1907 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
63eb9546 | 1908 | |
6b060ffe FZ |
1909 | usb_set_intfdata(intf, NULL); |
1910 | ||
63eb9546 | 1911 | /* We don't want people trying to open up the device */ |
e07a1d8a | 1912 | video_unregister_device(gspca_dev->vdev); |
6b060ffe | 1913 | |
3145b8c1 JFM |
1914 | gspca_dev->present = 0; |
1915 | gspca_dev->streaming = 0; | |
1916 | ||
6b060ffe FZ |
1917 | kref_put(&gspca_dev->kref, gspca_delete); |
1918 | ||
63eb9546 JFM |
1919 | PDEBUG(D_PROBE, "disconnect complete"); |
1920 | } | |
1921 | EXPORT_SYMBOL(gspca_disconnect); | |
1922 | ||
6a709749 JFM |
1923 | #ifdef CONFIG_PM |
1924 | int gspca_suspend(struct usb_interface *intf, pm_message_t message) | |
1925 | { | |
1926 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
1927 | ||
1928 | if (!gspca_dev->streaming) | |
1929 | return 0; | |
1930 | gspca_dev->frozen = 1; /* avoid urb error messages */ | |
012d6b02 JFM |
1931 | if (gspca_dev->sd_desc->stopN) |
1932 | gspca_dev->sd_desc->stopN(gspca_dev); | |
6a709749 JFM |
1933 | destroy_urbs(gspca_dev); |
1934 | gspca_set_alt0(gspca_dev); | |
012d6b02 JFM |
1935 | if (gspca_dev->sd_desc->stop0) |
1936 | gspca_dev->sd_desc->stop0(gspca_dev); | |
6a709749 JFM |
1937 | return 0; |
1938 | } | |
1939 | EXPORT_SYMBOL(gspca_suspend); | |
1940 | ||
1941 | int gspca_resume(struct usb_interface *intf) | |
1942 | { | |
1943 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
1944 | ||
1945 | gspca_dev->frozen = 0; | |
012d6b02 JFM |
1946 | gspca_dev->sd_desc->init(gspca_dev); |
1947 | if (gspca_dev->streaming) | |
1948 | return gspca_init_transfer(gspca_dev); | |
1e89e2da | 1949 | return 0; |
6a709749 JFM |
1950 | } |
1951 | EXPORT_SYMBOL(gspca_resume); | |
1952 | #endif | |
dcef3237 HG |
1953 | /* -- cam driver utility functions -- */ |
1954 | ||
1955 | /* auto gain and exposure algorithm based on the knee algorithm described here: | |
1956 | http://ytse.tricolour.net/docs/LowLightOptimization.html | |
1957 | ||
1958 | Returns 0 if no changes were made, 1 if the gain and or exposure settings | |
1959 | where changed. */ | |
1960 | int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum, | |
1961 | int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee) | |
1962 | { | |
1963 | int i, steps, gain, orig_gain, exposure, orig_exposure, autogain; | |
1964 | const struct ctrl *gain_ctrl = NULL; | |
1965 | const struct ctrl *exposure_ctrl = NULL; | |
1966 | const struct ctrl *autogain_ctrl = NULL; | |
1967 | int retval = 0; | |
1968 | ||
1969 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
1970 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN) | |
1971 | gain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
1972 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE) | |
1973 | exposure_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
1974 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN) | |
1975 | autogain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
1976 | } | |
1977 | if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) { | |
1978 | PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called " | |
1979 | "on cam without (auto)gain/exposure"); | |
1980 | return 0; | |
1981 | } | |
1982 | ||
1983 | if (gain_ctrl->get(gspca_dev, &gain) || | |
1984 | exposure_ctrl->get(gspca_dev, &exposure) || | |
1985 | autogain_ctrl->get(gspca_dev, &autogain) || !autogain) | |
1986 | return 0; | |
1987 | ||
1988 | orig_gain = gain; | |
1989 | orig_exposure = exposure; | |
1990 | ||
1991 | /* If we are of a multiple of deadzone, do multiple steps to reach the | |
1992 | desired lumination fast (with the risc of a slight overshoot) */ | |
1993 | steps = abs(desired_avg_lum - avg_lum) / deadzone; | |
1994 | ||
1995 | PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d\n", | |
1996 | avg_lum, desired_avg_lum, steps); | |
1997 | ||
1998 | for (i = 0; i < steps; i++) { | |
1999 | if (avg_lum > desired_avg_lum) { | |
2000 | if (gain > gain_knee) | |
2001 | gain--; | |
2002 | else if (exposure > exposure_knee) | |
2003 | exposure--; | |
2004 | else if (gain > gain_ctrl->qctrl.default_value) | |
2005 | gain--; | |
2006 | else if (exposure > exposure_ctrl->qctrl.minimum) | |
2007 | exposure--; | |
2008 | else if (gain > gain_ctrl->qctrl.minimum) | |
2009 | gain--; | |
2010 | else | |
2011 | break; | |
2012 | } else { | |
2013 | if (gain < gain_ctrl->qctrl.default_value) | |
2014 | gain++; | |
2015 | else if (exposure < exposure_knee) | |
2016 | exposure++; | |
2017 | else if (gain < gain_knee) | |
2018 | gain++; | |
2019 | else if (exposure < exposure_ctrl->qctrl.maximum) | |
2020 | exposure++; | |
2021 | else if (gain < gain_ctrl->qctrl.maximum) | |
2022 | gain++; | |
2023 | else | |
2024 | break; | |
2025 | } | |
2026 | } | |
2027 | ||
2028 | if (gain != orig_gain) { | |
2029 | gain_ctrl->set(gspca_dev, gain); | |
2030 | retval = 1; | |
2031 | } | |
2032 | if (exposure != orig_exposure) { | |
2033 | exposure_ctrl->set(gspca_dev, exposure); | |
2034 | retval = 1; | |
2035 | } | |
2036 | ||
2037 | return retval; | |
2038 | } | |
2039 | EXPORT_SYMBOL(gspca_auto_gain_n_exposure); | |
2040 | ||
63eb9546 JFM |
2041 | /* -- module insert / remove -- */ |
2042 | static int __init gspca_init(void) | |
2043 | { | |
bb64e86c JFM |
2044 | info("main v%d.%d.%d registered", |
2045 | (DRIVER_VERSION_NUMBER >> 16) & 0xff, | |
2046 | (DRIVER_VERSION_NUMBER >> 8) & 0xff, | |
2047 | DRIVER_VERSION_NUMBER & 0xff); | |
63eb9546 JFM |
2048 | return 0; |
2049 | } | |
2050 | static void __exit gspca_exit(void) | |
2051 | { | |
2052 | info("main deregistered"); | |
2053 | } | |
2054 | ||
2055 | module_init(gspca_init); | |
2056 | module_exit(gspca_exit); | |
2057 | ||
335b3f88 | 2058 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
2059 | module_param_named(debug, gspca_debug, int, 0644); |
2060 | MODULE_PARM_DESC(debug, | |
2061 | "Debug (bit) 0x01:error 0x02:probe 0x04:config" | |
d43fa32f JFM |
2062 | " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout" |
2063 | " 0x0100: v4l2"); | |
6a7eba24 | 2064 | #endif |