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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 JFM |
34 | #include <linux/jiffies.h> |
35 | ||
36 | #include "gspca.h" | |
37 | ||
d43fa32f | 38 | /* global values */ |
ac0d6df6 | 39 | #define DEF_NURBS 2 /* default number of URBs */ |
d43fa32f | 40 | |
63eb9546 JFM |
41 | MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>"); |
42 | MODULE_DESCRIPTION("GSPCA USB Camera Driver"); | |
43 | MODULE_LICENSE("GPL"); | |
44 | ||
5b77ae77 JFM |
45 | #define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 1, 7) |
46 | static const char version[] = "2.1.7"; | |
63eb9546 JFM |
47 | |
48 | static int video_nr = -1; | |
49 | ||
d646e701 | 50 | #ifdef CONFIG_VIDEO_ADV_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 | ||
105 | /* | |
d43fa32f | 106 | * fill a video frame from an URB and resubmit |
63eb9546 | 107 | */ |
d43fa32f JFM |
108 | static void fill_frame(struct gspca_dev *gspca_dev, |
109 | struct urb *urb) | |
63eb9546 | 110 | { |
63eb9546 | 111 | struct gspca_frame *frame; |
6a7eba24 | 112 | __u8 *data; /* address of data in the iso message */ |
63eb9546 JFM |
113 | int i, j, len, st; |
114 | cam_pkt_op pkt_scan; | |
115 | ||
6a7eba24 JFM |
116 | if (urb->status != 0) { |
117 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); | |
118 | return; /* disconnection ? */ | |
119 | } | |
63eb9546 JFM |
120 | pkt_scan = gspca_dev->sd_desc->pkt_scan; |
121 | for (i = 0; i < urb->number_of_packets; i++) { | |
122 | ||
123 | /* check the availability of the frame buffer */ | |
124 | j = gspca_dev->fr_i; | |
125 | j = gspca_dev->fr_queue[j]; | |
126 | frame = &gspca_dev->frame[j]; | |
d43fa32f | 127 | if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS) |
63eb9546 JFM |
128 | != V4L2_BUF_FLAG_QUEUED) { |
129 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
130 | break; | |
131 | } | |
132 | ||
133 | /* check the packet status and length */ | |
134 | len = urb->iso_frame_desc[i].actual_length; | |
6a7eba24 JFM |
135 | if (len == 0) |
136 | continue; | |
63eb9546 JFM |
137 | st = urb->iso_frame_desc[i].status; |
138 | if (st) { | |
6a7eba24 JFM |
139 | PDEBUG(D_ERR, |
140 | "ISOC data error: [%d] len=%d, status=%d", | |
63eb9546 JFM |
141 | i, len, st); |
142 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
143 | continue; | |
144 | } | |
63eb9546 JFM |
145 | |
146 | /* let the packet be analyzed by the subdriver */ | |
147 | PDEBUG(D_PACK, "packet [%d] o:%d l:%d", | |
148 | i, urb->iso_frame_desc[i].offset, len); | |
6a7eba24 | 149 | data = (__u8 *) urb->transfer_buffer |
63eb9546 JFM |
150 | + urb->iso_frame_desc[i].offset; |
151 | pkt_scan(gspca_dev, frame, data, len); | |
152 | } | |
153 | ||
154 | /* resubmit the URB */ | |
155 | urb->status = 0; | |
156 | st = usb_submit_urb(urb, GFP_ATOMIC); | |
157 | if (st < 0) | |
158 | PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st); | |
159 | } | |
160 | ||
d43fa32f JFM |
161 | /* |
162 | * ISOC message interrupt from the USB device | |
163 | * | |
ac0d6df6 | 164 | * Analyse each packet and call the subdriver for copy to the frame buffer. |
d43fa32f | 165 | */ |
ac0d6df6 | 166 | static void isoc_irq(struct urb *urb |
6a7eba24 | 167 | ) |
d43fa32f JFM |
168 | { |
169 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
170 | ||
3647fea8 | 171 | PDEBUG(D_PACK, "isoc irq"); |
d43fa32f JFM |
172 | if (!gspca_dev->streaming) |
173 | return; | |
174 | fill_frame(gspca_dev, urb); | |
175 | } | |
176 | ||
63eb9546 JFM |
177 | /* |
178 | * add data to the current frame | |
179 | * | |
ac0d6df6 JFM |
180 | * This function is called by the subdrivers at interrupt level. |
181 | * | |
63eb9546 JFM |
182 | * To build a frame, these ones must add |
183 | * - one FIRST_PACKET | |
184 | * - 0 or many INTER_PACKETs | |
185 | * - one LAST_PACKET | |
186 | * DISCARD_PACKET invalidates the whole frame. | |
187 | * On LAST_PACKET, a new frame is returned. | |
188 | */ | |
189 | struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev, | |
190 | int packet_type, | |
191 | struct gspca_frame *frame, | |
a5ae2062 | 192 | const __u8 *data, |
63eb9546 JFM |
193 | int len) |
194 | { | |
195 | int i, j; | |
196 | ||
e2997a72 | 197 | PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len); |
63eb9546 JFM |
198 | |
199 | /* when start of a new frame, if the current frame buffer | |
200 | * is not queued, discard the whole frame */ | |
201 | if (packet_type == FIRST_PACKET) { | |
d43fa32f JFM |
202 | if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS) |
203 | != V4L2_BUF_FLAG_QUEUED) { | |
63eb9546 JFM |
204 | gspca_dev->last_packet_type = DISCARD_PACKET; |
205 | return frame; | |
206 | } | |
207 | frame->data_end = frame->data; | |
208 | jiffies_to_timeval(get_jiffies_64(), | |
209 | &frame->v4l2_buf.timestamp); | |
210 | frame->v4l2_buf.sequence = ++gspca_dev->sequence; | |
d43fa32f | 211 | } else if (gspca_dev->last_packet_type == DISCARD_PACKET) { |
63eb9546 | 212 | return frame; |
d43fa32f | 213 | } |
63eb9546 | 214 | |
d43fa32f | 215 | /* append the packet to the frame buffer */ |
63eb9546 JFM |
216 | if (len > 0) { |
217 | if (frame->data_end - frame->data + len | |
218 | > frame->v4l2_buf.length) { | |
a9e11134 | 219 | PDEBUG(D_ERR|D_PACK, "frame overflow %zd > %d", |
63eb9546 JFM |
220 | frame->data_end - frame->data + len, |
221 | frame->v4l2_buf.length); | |
222 | packet_type = DISCARD_PACKET; | |
223 | } else { | |
ac0d6df6 | 224 | memcpy(frame->data_end, data, len); |
63eb9546 JFM |
225 | frame->data_end += len; |
226 | } | |
227 | } | |
228 | gspca_dev->last_packet_type = packet_type; | |
229 | ||
230 | /* if last packet, wake the application and advance in the queue */ | |
231 | if (packet_type == LAST_PACKET) { | |
232 | frame->v4l2_buf.bytesused = frame->data_end - frame->data; | |
233 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_QUEUED; | |
234 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_DONE; | |
235 | atomic_inc(&gspca_dev->nevent); | |
236 | wake_up_interruptible(&gspca_dev->wq); /* event = new frame */ | |
d43fa32f JFM |
237 | i = (gspca_dev->fr_i + 1) % gspca_dev->nframes; |
238 | gspca_dev->fr_i = i; | |
63eb9546 JFM |
239 | PDEBUG(D_FRAM, "frame complete len:%d q:%d i:%d o:%d", |
240 | frame->v4l2_buf.bytesused, | |
241 | gspca_dev->fr_q, | |
242 | i, | |
243 | gspca_dev->fr_o); | |
244 | j = gspca_dev->fr_queue[i]; | |
245 | frame = &gspca_dev->frame[j]; | |
63eb9546 JFM |
246 | } |
247 | return frame; | |
248 | } | |
249 | EXPORT_SYMBOL(gspca_frame_add); | |
250 | ||
251 | static int gspca_is_compressed(__u32 format) | |
252 | { | |
253 | switch (format) { | |
254 | case V4L2_PIX_FMT_MJPEG: | |
255 | case V4L2_PIX_FMT_JPEG: | |
50a871fe | 256 | case V4L2_PIX_FMT_SPCA561: |
ab8f12cf | 257 | case V4L2_PIX_FMT_PAC207: |
63eb9546 JFM |
258 | return 1; |
259 | } | |
260 | return 0; | |
261 | } | |
262 | ||
263 | static void *rvmalloc(unsigned long size) | |
264 | { | |
265 | void *mem; | |
266 | unsigned long adr; | |
267 | ||
d43fa32f | 268 | /* size = PAGE_ALIGN(size); (already done) */ |
63eb9546 | 269 | mem = vmalloc_32(size); |
efab8211 | 270 | if (mem != NULL) { |
63eb9546 JFM |
271 | adr = (unsigned long) mem; |
272 | while ((long) size > 0) { | |
273 | SetPageReserved(vmalloc_to_page((void *) adr)); | |
274 | adr += PAGE_SIZE; | |
275 | size -= PAGE_SIZE; | |
276 | } | |
277 | } | |
278 | return mem; | |
279 | } | |
280 | ||
ac0d6df6 | 281 | static void rvfree(void *mem, long size) |
63eb9546 JFM |
282 | { |
283 | unsigned long adr; | |
284 | ||
63eb9546 | 285 | adr = (unsigned long) mem; |
ac0d6df6 | 286 | while (size > 0) { |
63eb9546 JFM |
287 | ClearPageReserved(vmalloc_to_page((void *) adr)); |
288 | adr += PAGE_SIZE; | |
289 | size -= PAGE_SIZE; | |
290 | } | |
291 | vfree(mem); | |
292 | } | |
293 | ||
294 | static int frame_alloc(struct gspca_dev *gspca_dev, | |
d43fa32f | 295 | unsigned int count) |
63eb9546 | 296 | { |
d43fa32f JFM |
297 | struct gspca_frame *frame; |
298 | unsigned int frsz; | |
299 | int i; | |
63eb9546 | 300 | |
c2446b3e JFM |
301 | i = gspca_dev->curr_mode; |
302 | frsz = gspca_dev->cam.cam_mode[i].sizeimage; | |
63eb9546 | 303 | PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz); |
63eb9546 | 304 | frsz = PAGE_ALIGN(frsz); |
63eb9546 | 305 | gspca_dev->frsz = frsz; |
c2446b3e JFM |
306 | if (count > GSPCA_MAX_FRAMES) |
307 | count = GSPCA_MAX_FRAMES; | |
ac0d6df6 JFM |
308 | gspca_dev->frbuf = rvmalloc(frsz * count); |
309 | if (!gspca_dev->frbuf) { | |
310 | err("frame alloc failed"); | |
311 | return -ENOMEM; | |
63eb9546 JFM |
312 | } |
313 | gspca_dev->nframes = count; | |
314 | for (i = 0; i < count; i++) { | |
d43fa32f JFM |
315 | frame = &gspca_dev->frame[i]; |
316 | frame->v4l2_buf.index = i; | |
317 | frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
318 | frame->v4l2_buf.flags = 0; | |
319 | frame->v4l2_buf.field = V4L2_FIELD_NONE; | |
320 | frame->v4l2_buf.length = frsz; | |
321 | frame->v4l2_buf.memory = gspca_dev->memory; | |
322 | frame->v4l2_buf.sequence = 0; | |
ac0d6df6 | 323 | frame->data = frame->data_end = |
d43fa32f | 324 | gspca_dev->frbuf + i * frsz; |
ac0d6df6 | 325 | frame->v4l2_buf.m.offset = i * frsz; |
63eb9546 JFM |
326 | } |
327 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
328 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
329 | gspca_dev->sequence = 0; | |
330 | atomic_set(&gspca_dev->nevent, 0); | |
d43fa32f | 331 | return 0; |
63eb9546 JFM |
332 | } |
333 | ||
334 | static void frame_free(struct gspca_dev *gspca_dev) | |
335 | { | |
336 | int i; | |
337 | ||
338 | PDEBUG(D_STREAM, "frame free"); | |
efab8211 | 339 | if (gspca_dev->frbuf != NULL) { |
63eb9546 JFM |
340 | rvfree(gspca_dev->frbuf, |
341 | gspca_dev->nframes * gspca_dev->frsz); | |
342 | gspca_dev->frbuf = NULL; | |
343 | for (i = 0; i < gspca_dev->nframes; i++) | |
344 | gspca_dev->frame[i].data = NULL; | |
345 | } | |
346 | gspca_dev->nframes = 0; | |
347 | } | |
348 | ||
d43fa32f | 349 | static void destroy_urbs(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
350 | { |
351 | struct urb *urb; | |
352 | unsigned int i; | |
353 | ||
354 | PDEBUG(D_STREAM, "kill transfer"); | |
d43fa32f | 355 | for (i = 0; i < MAX_NURBS; ++i) { |
4aa0d037 | 356 | urb = gspca_dev->urb[i]; |
63eb9546 | 357 | if (urb == NULL) |
d43fa32f | 358 | break; |
63eb9546 | 359 | |
4aa0d037 | 360 | gspca_dev->urb[i] = NULL; |
63eb9546 | 361 | usb_kill_urb(urb); |
efab8211 | 362 | if (urb->transfer_buffer != NULL) |
63eb9546 JFM |
363 | usb_buffer_free(gspca_dev->dev, |
364 | urb->transfer_buffer_length, | |
4aa0d037 | 365 | urb->transfer_buffer, |
63eb9546 | 366 | urb->transfer_dma); |
63eb9546 JFM |
367 | usb_free_urb(urb); |
368 | } | |
63eb9546 JFM |
369 | } |
370 | ||
371 | /* | |
372 | * search an input isochronous endpoint in an alternate setting | |
373 | */ | |
374 | static struct usb_host_endpoint *alt_isoc(struct usb_host_interface *alt, | |
375 | __u8 epaddr) | |
376 | { | |
377 | struct usb_host_endpoint *ep; | |
378 | int i, attr; | |
379 | ||
380 | epaddr |= USB_DIR_IN; | |
381 | for (i = 0; i < alt->desc.bNumEndpoints; i++) { | |
382 | ep = &alt->endpoint[i]; | |
383 | if (ep->desc.bEndpointAddress == epaddr) { | |
384 | attr = ep->desc.bmAttributes | |
385 | & USB_ENDPOINT_XFERTYPE_MASK; | |
386 | if (attr == USB_ENDPOINT_XFER_ISOC) | |
387 | return ep; | |
388 | break; | |
389 | } | |
390 | } | |
391 | return NULL; | |
392 | } | |
393 | ||
394 | /* | |
395 | * search an input isochronous endpoint | |
396 | * | |
397 | * The endpoint is defined by the subdriver. | |
398 | * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep). | |
399 | * This routine may be called many times when the bandwidth is too small | |
400 | * (the bandwidth is checked on urb submit). | |
401 | */ | |
402 | struct usb_host_endpoint *get_isoc_ep(struct gspca_dev *gspca_dev) | |
403 | { | |
404 | struct usb_interface *intf; | |
405 | struct usb_host_endpoint *ep; | |
406 | int i, ret; | |
407 | ||
408 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
6a7eba24 | 409 | ep = NULL; |
63eb9546 JFM |
410 | i = gspca_dev->alt; /* previous alt setting */ |
411 | while (--i > 0) { /* alt 0 is unusable */ | |
412 | ep = alt_isoc(&intf->altsetting[i], gspca_dev->cam.epaddr); | |
413 | if (ep) | |
414 | break; | |
415 | } | |
6a7eba24 | 416 | if (ep == NULL) { |
63eb9546 JFM |
417 | err("no ISOC endpoint found"); |
418 | return NULL; | |
419 | } | |
420 | PDEBUG(D_STREAM, "use ISOC alt %d ep 0x%02x", | |
421 | i, ep->desc.bEndpointAddress); | |
422 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i); | |
423 | if (ret < 0) { | |
424 | err("set interface err %d", ret); | |
425 | return NULL; | |
426 | } | |
d43fa32f | 427 | gspca_dev->alt = i; /* memorize the current alt setting */ |
63eb9546 JFM |
428 | return ep; |
429 | } | |
430 | ||
431 | /* | |
432 | * create the isochronous URBs | |
433 | */ | |
434 | static int create_urbs(struct gspca_dev *gspca_dev, | |
435 | struct usb_host_endpoint *ep) | |
436 | { | |
437 | struct urb *urb; | |
d43fa32f | 438 | int n, nurbs, i, psize, npkt, bsize; |
63eb9546 JFM |
439 | |
440 | /* calculate the packet size and the number of packets */ | |
63eb9546 | 441 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
d43fa32f | 442 | |
63eb9546 JFM |
443 | /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ |
444 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); | |
445 | npkt = ISO_MAX_SIZE / psize; | |
446 | if (npkt > ISO_MAX_PKT) | |
447 | npkt = ISO_MAX_PKT; | |
448 | bsize = psize * npkt; | |
63eb9546 JFM |
449 | PDEBUG(D_STREAM, |
450 | "isoc %d pkts size %d (bsize:%d)", npkt, psize, bsize); | |
ac0d6df6 | 451 | nurbs = DEF_NURBS; |
6a7eba24 | 452 | gspca_dev->nurbs = nurbs; |
d43fa32f | 453 | for (n = 0; n < nurbs; n++) { |
63eb9546 JFM |
454 | urb = usb_alloc_urb(npkt, GFP_KERNEL); |
455 | if (!urb) { | |
456 | err("usb_alloc_urb failed"); | |
457 | return -ENOMEM; | |
458 | } | |
4aa0d037 | 459 | urb->transfer_buffer = usb_buffer_alloc(gspca_dev->dev, |
63eb9546 JFM |
460 | bsize, |
461 | GFP_KERNEL, | |
462 | &urb->transfer_dma); | |
463 | ||
4aa0d037 | 464 | if (urb->transfer_buffer == NULL) { |
63eb9546 | 465 | usb_free_urb(urb); |
d43fa32f | 466 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
467 | err("usb_buffer_urb failed"); |
468 | return -ENOMEM; | |
469 | } | |
4aa0d037 | 470 | gspca_dev->urb[n] = urb; |
63eb9546 JFM |
471 | urb->dev = gspca_dev->dev; |
472 | urb->context = gspca_dev; | |
473 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, | |
474 | ep->desc.bEndpointAddress); | |
4aa0d037 JFM |
475 | urb->transfer_flags = URB_ISO_ASAP |
476 | | URB_NO_TRANSFER_DMA_MAP; | |
63eb9546 | 477 | urb->interval = ep->desc.bInterval; |
ac0d6df6 | 478 | urb->complete = isoc_irq; |
63eb9546 JFM |
479 | urb->number_of_packets = npkt; |
480 | urb->transfer_buffer_length = bsize; | |
481 | for (i = 0; i < npkt; i++) { | |
482 | urb->iso_frame_desc[i].length = psize; | |
483 | urb->iso_frame_desc[i].offset = psize * i; | |
484 | } | |
485 | } | |
486 | return 0; | |
487 | } | |
488 | ||
489 | /* | |
490 | * start the USB transfer | |
491 | */ | |
492 | static int gspca_init_transfer(struct gspca_dev *gspca_dev) | |
493 | { | |
63eb9546 JFM |
494 | struct usb_host_endpoint *ep; |
495 | int n, ret; | |
496 | ||
e2997a72 HG |
497 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
498 | return -ERESTARTSYS; | |
63eb9546 | 499 | |
d43fa32f JFM |
500 | /* set the higher alternate setting and |
501 | * loop until urb submit succeeds */ | |
502 | gspca_dev->alt = gspca_dev->nbalt; | |
63eb9546 | 503 | for (;;) { |
d43fa32f | 504 | PDEBUG(D_STREAM, "init transfer alt %d", gspca_dev->alt); |
63eb9546 JFM |
505 | ep = get_isoc_ep(gspca_dev); |
506 | if (ep == NULL) { | |
507 | ret = -EIO; | |
508 | goto out; | |
509 | } | |
510 | ret = create_urbs(gspca_dev, ep); | |
511 | if (ret < 0) | |
512 | goto out; | |
513 | ||
514 | /* start the cam */ | |
515 | gspca_dev->sd_desc->start(gspca_dev); | |
516 | gspca_dev->streaming = 1; | |
517 | atomic_set(&gspca_dev->nevent, 0); | |
518 | ||
519 | /* submit the URBs */ | |
d43fa32f | 520 | for (n = 0; n < gspca_dev->nurbs; n++) { |
4aa0d037 | 521 | ret = usb_submit_urb(gspca_dev->urb[n], GFP_KERNEL); |
63eb9546 JFM |
522 | if (ret < 0) { |
523 | PDEBUG(D_ERR|D_STREAM, | |
524 | "usb_submit_urb [%d] err %d", n, ret); | |
e2997a72 | 525 | gspca_dev->streaming = 0; |
d43fa32f | 526 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
527 | if (ret == -ENOSPC) |
528 | break; /* try the previous alt */ | |
529 | goto out; | |
530 | } | |
531 | } | |
532 | if (ret >= 0) | |
533 | break; | |
534 | } | |
535 | out: | |
536 | mutex_unlock(&gspca_dev->usb_lock); | |
537 | return ret; | |
538 | } | |
539 | ||
540 | static int gspca_set_alt0(struct gspca_dev *gspca_dev) | |
541 | { | |
542 | int ret; | |
543 | ||
544 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0); | |
545 | if (ret < 0) | |
546 | PDEBUG(D_ERR|D_STREAM, "set interface 0 err %d", ret); | |
547 | return ret; | |
548 | } | |
549 | ||
e2997a72 | 550 | /* Note both the queue and the usb lock should be hold when calling this */ |
63eb9546 JFM |
551 | static void gspca_stream_off(struct gspca_dev *gspca_dev) |
552 | { | |
63eb9546 | 553 | gspca_dev->streaming = 0; |
d43fa32f | 554 | atomic_set(&gspca_dev->nevent, 0); |
63eb9546 JFM |
555 | if (gspca_dev->present) { |
556 | gspca_dev->sd_desc->stopN(gspca_dev); | |
d43fa32f | 557 | destroy_urbs(gspca_dev); |
63eb9546 JFM |
558 | gspca_set_alt0(gspca_dev); |
559 | gspca_dev->sd_desc->stop0(gspca_dev); | |
560 | PDEBUG(D_STREAM, "stream off OK"); | |
63eb9546 | 561 | } |
63eb9546 JFM |
562 | } |
563 | ||
d43fa32f | 564 | static void gspca_set_default_mode(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
565 | { |
566 | int i; | |
567 | ||
568 | i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ | |
569 | gspca_dev->curr_mode = i; | |
570 | gspca_dev->width = gspca_dev->cam.cam_mode[i].width; | |
571 | gspca_dev->height = gspca_dev->cam.cam_mode[i].height; | |
c2446b3e | 572 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
573 | } |
574 | ||
575 | static int wxh_to_mode(struct gspca_dev *gspca_dev, | |
576 | int width, int height) | |
577 | { | |
578 | int i; | |
579 | ||
d43fa32f JFM |
580 | for (i = gspca_dev->cam.nmodes; --i > 0; ) { |
581 | if (width >= gspca_dev->cam.cam_mode[i].width | |
582 | && height >= gspca_dev->cam.cam_mode[i].height) | |
63eb9546 JFM |
583 | break; |
584 | } | |
63eb9546 JFM |
585 | return i; |
586 | } | |
587 | ||
63eb9546 JFM |
588 | /* |
589 | * search a mode with the right pixel format | |
590 | */ | |
591 | static int gspca_get_mode(struct gspca_dev *gspca_dev, | |
592 | int mode, | |
593 | int pixfmt) | |
594 | { | |
595 | int modeU, modeD; | |
596 | ||
597 | modeU = modeD = mode; | |
598 | while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { | |
599 | if (--modeD >= 0) { | |
c2446b3e JFM |
600 | if (gspca_dev->cam.cam_mode[modeD].pixelformat |
601 | == pixfmt) | |
63eb9546 JFM |
602 | return modeD; |
603 | } | |
604 | if (++modeU < gspca_dev->cam.nmodes) { | |
c2446b3e JFM |
605 | if (gspca_dev->cam.cam_mode[modeU].pixelformat |
606 | == pixfmt) | |
63eb9546 JFM |
607 | return modeU; |
608 | } | |
609 | } | |
610 | return -EINVAL; | |
611 | } | |
612 | ||
e078770a | 613 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
614 | struct v4l2_fmtdesc *fmtdesc) |
615 | { | |
616 | struct gspca_dev *gspca_dev = priv; | |
6a7eba24 | 617 | int i, j, index; |
63eb9546 JFM |
618 | __u32 fmt_tb[8]; |
619 | ||
63eb9546 JFM |
620 | /* give an index to each format */ |
621 | index = 0; | |
622 | j = 0; | |
623 | for (i = gspca_dev->cam.nmodes; --i >= 0; ) { | |
c2446b3e | 624 | fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
625 | j = 0; |
626 | for (;;) { | |
627 | if (fmt_tb[j] == fmt_tb[index]) | |
628 | break; | |
629 | j++; | |
630 | } | |
631 | if (j == index) { | |
632 | if (fmtdesc->index == index) | |
633 | break; /* new format */ | |
634 | index++; | |
635 | if (index >= sizeof fmt_tb / sizeof fmt_tb[0]) | |
636 | return -EINVAL; | |
637 | } | |
638 | } | |
639 | if (i < 0) | |
640 | return -EINVAL; /* no more format */ | |
641 | ||
63eb9546 JFM |
642 | fmtdesc->pixelformat = fmt_tb[index]; |
643 | if (gspca_is_compressed(fmt_tb[index])) | |
644 | fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; | |
d43fa32f | 645 | fmtdesc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
63eb9546 JFM |
646 | fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; |
647 | fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; | |
648 | fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; | |
649 | fmtdesc->description[3] = fmtdesc->pixelformat >> 24; | |
650 | fmtdesc->description[4] = '\0'; | |
651 | return 0; | |
652 | } | |
653 | ||
e078770a | 654 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
655 | struct v4l2_format *fmt) |
656 | { | |
657 | struct gspca_dev *gspca_dev = priv; | |
c2446b3e | 658 | int mode; |
63eb9546 | 659 | |
6a7eba24 JFM |
660 | if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
661 | return -EINVAL; | |
c2446b3e JFM |
662 | mode = gspca_dev->curr_mode; |
663 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], | |
664 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
665 | return 0; |
666 | } | |
667 | ||
e078770a | 668 | static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
669 | struct v4l2_format *fmt) |
670 | { | |
24c530b4 | 671 | int w, h, mode, mode2; |
63eb9546 | 672 | |
6a7eba24 JFM |
673 | if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
674 | return -EINVAL; | |
4aa0d037 JFM |
675 | w = fmt->fmt.pix.width; |
676 | h = fmt->fmt.pix.height; | |
d43fa32f | 677 | |
d646e701 | 678 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
63eb9546 JFM |
679 | if (gspca_debug & D_CONF) |
680 | PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h); | |
681 | #endif | |
682 | /* search the closest mode for width and height */ | |
683 | mode = wxh_to_mode(gspca_dev, w, h); | |
684 | ||
685 | /* OK if right palette */ | |
c2446b3e JFM |
686 | if (gspca_dev->cam.cam_mode[mode].pixelformat |
687 | != fmt->fmt.pix.pixelformat) { | |
63eb9546 JFM |
688 | |
689 | /* else, search the closest mode with the same pixel format */ | |
690 | mode2 = gspca_get_mode(gspca_dev, mode, | |
691 | fmt->fmt.pix.pixelformat); | |
c2446b3e | 692 | if (mode2 >= 0) |
63eb9546 | 693 | mode = mode2; |
c2446b3e JFM |
694 | /* else |
695 | ; * no chance, return this mode */ | |
63eb9546 | 696 | } |
c2446b3e JFM |
697 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], |
698 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
699 | return mode; /* used when s_fmt */ |
700 | } | |
701 | ||
e078770a | 702 | static int vidioc_try_fmt_vid_cap(struct file *file, |
63eb9546 JFM |
703 | void *priv, |
704 | struct v4l2_format *fmt) | |
705 | { | |
4aa0d037 | 706 | struct gspca_dev *gspca_dev = priv; |
63eb9546 JFM |
707 | int ret; |
708 | ||
e078770a | 709 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
710 | if (ret < 0) |
711 | return ret; | |
712 | return 0; | |
713 | } | |
714 | ||
e078770a | 715 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
716 | struct v4l2_format *fmt) |
717 | { | |
718 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 719 | int ret; |
63eb9546 | 720 | |
e2997a72 HG |
721 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
722 | return -ERESTARTSYS; | |
d43fa32f | 723 | |
e078770a | 724 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
725 | if (ret < 0) |
726 | goto out; | |
727 | ||
d43fa32f JFM |
728 | if (gspca_dev->nframes != 0 |
729 | && fmt->fmt.pix.sizeimage > gspca_dev->frsz) { | |
730 | ret = -EINVAL; | |
731 | goto out; | |
732 | } | |
733 | ||
50a871fe JFM |
734 | if (ret == gspca_dev->curr_mode) { |
735 | ret = 0; | |
63eb9546 | 736 | goto out; /* same mode */ |
50a871fe | 737 | } |
d43fa32f JFM |
738 | |
739 | if (gspca_dev->streaming) { | |
740 | ret = -EBUSY; | |
741 | goto out; | |
e2997a72 | 742 | } |
4aa0d037 JFM |
743 | gspca_dev->width = fmt->fmt.pix.width; |
744 | gspca_dev->height = fmt->fmt.pix.height; | |
63eb9546 JFM |
745 | gspca_dev->pixfmt = fmt->fmt.pix.pixelformat; |
746 | gspca_dev->curr_mode = ret; | |
d43fa32f | 747 | |
d43fa32f | 748 | ret = 0; |
63eb9546 JFM |
749 | out: |
750 | mutex_unlock(&gspca_dev->queue_lock); | |
751 | return ret; | |
752 | } | |
753 | ||
754 | static int dev_open(struct inode *inode, struct file *file) | |
755 | { | |
756 | struct gspca_dev *gspca_dev; | |
757 | int ret; | |
758 | ||
d43fa32f | 759 | PDEBUG(D_STREAM, "%s open", current->comm); |
63eb9546 | 760 | gspca_dev = (struct gspca_dev *) video_devdata(file); |
e2997a72 HG |
761 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
762 | return -ERESTARTSYS; | |
63eb9546 JFM |
763 | if (!gspca_dev->present) { |
764 | ret = -ENODEV; | |
765 | goto out; | |
766 | } | |
767 | ||
768 | /* if not done yet, initialize the sensor */ | |
769 | if (gspca_dev->users == 0) { | |
e2997a72 HG |
770 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { |
771 | ret = -ERESTARTSYS; | |
63eb9546 | 772 | goto out; |
e2997a72 | 773 | } |
63eb9546 JFM |
774 | ret = gspca_dev->sd_desc->open(gspca_dev); |
775 | mutex_unlock(&gspca_dev->usb_lock); | |
776 | if (ret != 0) { | |
777 | PDEBUG(D_ERR|D_CONF, "init device failed %d", ret); | |
778 | goto out; | |
779 | } | |
e2997a72 | 780 | } else if (gspca_dev->users > 4) { /* (arbitrary value) */ |
63eb9546 JFM |
781 | ret = -EBUSY; |
782 | goto out; | |
783 | } | |
784 | gspca_dev->users++; | |
785 | file->private_data = gspca_dev; | |
d646e701 | 786 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
63eb9546 | 787 | /* activate the v4l2 debug */ |
d43fa32f | 788 | if (gspca_debug & D_V4L2) |
63eb9546 JFM |
789 | gspca_dev->vdev.debug |= 3; |
790 | else | |
791 | gspca_dev->vdev.debug &= ~3; | |
792 | #endif | |
793 | out: | |
794 | mutex_unlock(&gspca_dev->queue_lock); | |
795 | if (ret != 0) | |
796 | PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret); | |
797 | else | |
d43fa32f | 798 | PDEBUG(D_STREAM, "open done"); |
63eb9546 JFM |
799 | return ret; |
800 | } | |
801 | ||
802 | static int dev_close(struct inode *inode, struct file *file) | |
803 | { | |
804 | struct gspca_dev *gspca_dev = file->private_data; | |
805 | ||
d43fa32f | 806 | PDEBUG(D_STREAM, "%s close", current->comm); |
e2997a72 HG |
807 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
808 | return -ERESTARTSYS; | |
809 | gspca_dev->users--; | |
e2997a72 | 810 | |
5b77ae77 | 811 | /* if the file did the capture, free the streaming resources */ |
4aa0d037 JFM |
812 | if (gspca_dev->capt_file == file) { |
813 | mutex_lock(&gspca_dev->usb_lock); | |
814 | if (gspca_dev->streaming) | |
815 | gspca_stream_off(gspca_dev); | |
816 | gspca_dev->sd_desc->close(gspca_dev); | |
817 | mutex_unlock(&gspca_dev->usb_lock); | |
818 | frame_free(gspca_dev); | |
efab8211 | 819 | gspca_dev->capt_file = NULL; |
d43fa32f | 820 | gspca_dev->memory = GSPCA_MEMORY_NO; |
4aa0d037 | 821 | } |
d43fa32f | 822 | file->private_data = NULL; |
63eb9546 | 823 | mutex_unlock(&gspca_dev->queue_lock); |
d43fa32f | 824 | PDEBUG(D_STREAM, "close done"); |
63eb9546 JFM |
825 | return 0; |
826 | } | |
827 | ||
828 | static int vidioc_querycap(struct file *file, void *priv, | |
829 | struct v4l2_capability *cap) | |
830 | { | |
831 | struct gspca_dev *gspca_dev = priv; | |
832 | ||
63eb9546 JFM |
833 | memset(cap, 0, sizeof *cap); |
834 | strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver); | |
835 | strncpy(cap->card, gspca_dev->cam.dev_name, sizeof cap->card); | |
836 | strncpy(cap->bus_info, gspca_dev->dev->bus->bus_name, | |
837 | sizeof cap->bus_info); | |
838 | cap->version = DRIVER_VERSION_NUMBER; | |
839 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | |
840 | | V4L2_CAP_STREAMING | |
841 | | V4L2_CAP_READWRITE; | |
842 | return 0; | |
843 | } | |
844 | ||
6a7eba24 | 845 | /* the use of V4L2_CTRL_FLAG_NEXT_CTRL asks for the controls to be sorted */ |
63eb9546 JFM |
846 | static int vidioc_queryctrl(struct file *file, void *priv, |
847 | struct v4l2_queryctrl *q_ctrl) | |
848 | { | |
849 | struct gspca_dev *gspca_dev = priv; | |
850 | int i; | |
6a7eba24 JFM |
851 | u32 id; |
852 | ||
853 | id = q_ctrl->id; | |
854 | if (id & V4L2_CTRL_FLAG_NEXT_CTRL) { | |
855 | id &= V4L2_CTRL_ID_MASK; | |
856 | id++; | |
857 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
858 | if (id >= gspca_dev->sd_desc->ctrls[i].qctrl.id) { | |
859 | memcpy(q_ctrl, | |
860 | &gspca_dev->sd_desc->ctrls[i].qctrl, | |
861 | sizeof *q_ctrl); | |
862 | return 0; | |
863 | } | |
864 | } | |
865 | return -EINVAL; | |
866 | } | |
63eb9546 | 867 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { |
6a7eba24 | 868 | if (id == gspca_dev->sd_desc->ctrls[i].qctrl.id) { |
63eb9546 JFM |
869 | memcpy(q_ctrl, |
870 | &gspca_dev->sd_desc->ctrls[i].qctrl, | |
871 | sizeof *q_ctrl); | |
872 | return 0; | |
873 | } | |
874 | } | |
6a7eba24 JFM |
875 | if (id >= V4L2_CID_BASE |
876 | && id <= V4L2_CID_LASTP1) { | |
63eb9546 JFM |
877 | q_ctrl->flags |= V4L2_CTRL_FLAG_DISABLED; |
878 | return 0; | |
879 | } | |
880 | return -EINVAL; | |
881 | } | |
882 | ||
883 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
884 | struct v4l2_control *ctrl) | |
885 | { | |
886 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 887 | const struct ctrl *ctrls; |
63eb9546 JFM |
888 | int i, ret; |
889 | ||
63eb9546 JFM |
890 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; |
891 | i < gspca_dev->sd_desc->nctrls; | |
892 | i++, ctrls++) { | |
893 | if (ctrl->id != ctrls->qctrl.id) | |
894 | continue; | |
895 | if (ctrl->value < ctrls->qctrl.minimum | |
896 | && ctrl->value > ctrls->qctrl.maximum) | |
897 | return -ERANGE; | |
898 | PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value); | |
e2997a72 HG |
899 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
900 | return -ERESTARTSYS; | |
63eb9546 JFM |
901 | ret = ctrls->set(gspca_dev, ctrl->value); |
902 | mutex_unlock(&gspca_dev->usb_lock); | |
903 | return ret; | |
904 | } | |
905 | return -EINVAL; | |
906 | } | |
907 | ||
908 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
909 | struct v4l2_control *ctrl) | |
910 | { | |
911 | struct gspca_dev *gspca_dev = priv; | |
912 | ||
a5ae2062 | 913 | const struct ctrl *ctrls; |
63eb9546 JFM |
914 | int i, ret; |
915 | ||
916 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; | |
917 | i < gspca_dev->sd_desc->nctrls; | |
918 | i++, ctrls++) { | |
919 | if (ctrl->id != ctrls->qctrl.id) | |
920 | continue; | |
e2997a72 HG |
921 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
922 | return -ERESTARTSYS; | |
63eb9546 JFM |
923 | ret = ctrls->get(gspca_dev, &ctrl->value); |
924 | mutex_unlock(&gspca_dev->usb_lock); | |
925 | return ret; | |
926 | } | |
927 | return -EINVAL; | |
928 | } | |
929 | ||
930 | static int vidioc_querymenu(struct file *file, void *priv, | |
931 | struct v4l2_querymenu *qmenu) | |
932 | { | |
933 | struct gspca_dev *gspca_dev = priv; | |
934 | ||
935 | if (!gspca_dev->sd_desc->querymenu) | |
936 | return -EINVAL; | |
937 | return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu); | |
938 | } | |
939 | ||
940 | static int vidioc_enum_input(struct file *file, void *priv, | |
941 | struct v4l2_input *input) | |
942 | { | |
943 | struct gspca_dev *gspca_dev = priv; | |
944 | ||
945 | if (input->index != 0) | |
946 | return -EINVAL; | |
947 | memset(input, 0, sizeof *input); | |
948 | input->type = V4L2_INPUT_TYPE_CAMERA; | |
949 | strncpy(input->name, gspca_dev->sd_desc->name, | |
950 | sizeof input->name); | |
951 | return 0; | |
952 | } | |
953 | ||
954 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) | |
955 | { | |
956 | *i = 0; | |
957 | return 0; | |
958 | } | |
959 | ||
960 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) | |
961 | { | |
962 | if (i > 0) | |
963 | return -EINVAL; | |
964 | return (0); | |
965 | } | |
966 | ||
967 | static int vidioc_reqbufs(struct file *file, void *priv, | |
968 | struct v4l2_requestbuffers *rb) | |
969 | { | |
970 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 971 | int i, ret = 0; |
63eb9546 | 972 | |
63eb9546 JFM |
973 | if (rb->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
974 | return -EINVAL; | |
d43fa32f | 975 | switch (rb->memory) { |
5b77ae77 | 976 | case GSPCA_MEMORY_READ: /* (internal call) */ |
d43fa32f | 977 | case V4L2_MEMORY_MMAP: |
d43fa32f | 978 | case V4L2_MEMORY_USERPTR: |
6a7eba24 | 979 | break; |
d43fa32f | 980 | default: |
63eb9546 | 981 | return -EINVAL; |
d43fa32f | 982 | } |
e2997a72 HG |
983 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
984 | return -ERESTARTSYS; | |
d43fa32f | 985 | |
5b77ae77 JFM |
986 | if (gspca_dev->memory != GSPCA_MEMORY_NO |
987 | && gspca_dev->memory != rb->memory) { | |
4aa0d037 JFM |
988 | ret = -EBUSY; |
989 | goto out; | |
990 | } | |
d43fa32f | 991 | |
5b77ae77 JFM |
992 | /* only one file may do the capture */ |
993 | if (gspca_dev->capt_file != NULL | |
994 | && gspca_dev->capt_file != file) { | |
995 | ret = -EBUSY; | |
996 | goto out; | |
997 | } | |
998 | ||
999 | /* if allocated, the buffers must not be mapped */ | |
1000 | for (i = 0; i < gspca_dev->nframes; i++) { | |
1001 | if (gspca_dev->frame[i].vma_use_count) { | |
ac0d6df6 JFM |
1002 | ret = -EBUSY; |
1003 | goto out; | |
1004 | } | |
5b77ae77 JFM |
1005 | } |
1006 | ||
1007 | /* stop streaming */ | |
1008 | if (gspca_dev->streaming) { | |
1009 | mutex_lock(&gspca_dev->usb_lock); | |
1010 | gspca_stream_off(gspca_dev); | |
1011 | mutex_unlock(&gspca_dev->usb_lock); | |
1012 | } | |
1013 | ||
1014 | /* free the previous allocated buffers, if any */ | |
1015 | if (gspca_dev->nframes != 0) { | |
1016 | frame_free(gspca_dev); | |
1017 | gspca_dev->capt_file = NULL; | |
1018 | } | |
1019 | if (rb->count == 0) /* unrequest */ | |
1020 | goto out; | |
1021 | gspca_dev->memory = rb->memory; | |
1022 | ret = frame_alloc(gspca_dev, rb->count); | |
1023 | if (ret == 0) { | |
1024 | rb->count = gspca_dev->nframes; | |
1025 | gspca_dev->capt_file = file; | |
4aa0d037 JFM |
1026 | } |
1027 | out: | |
63eb9546 JFM |
1028 | mutex_unlock(&gspca_dev->queue_lock); |
1029 | PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count); | |
1030 | return ret; | |
1031 | } | |
1032 | ||
1033 | static int vidioc_querybuf(struct file *file, void *priv, | |
1034 | struct v4l2_buffer *v4l2_buf) | |
1035 | { | |
1036 | struct gspca_dev *gspca_dev = priv; | |
1037 | struct gspca_frame *frame; | |
1038 | ||
63eb9546 JFM |
1039 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE |
1040 | || v4l2_buf->index < 0 | |
1041 | || v4l2_buf->index >= gspca_dev->nframes) | |
1042 | return -EINVAL; | |
1043 | ||
1044 | frame = &gspca_dev->frame[v4l2_buf->index]; | |
1045 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1046 | return 0; | |
1047 | } | |
1048 | ||
1049 | static int vidioc_streamon(struct file *file, void *priv, | |
1050 | enum v4l2_buf_type buf_type) | |
1051 | { | |
1052 | struct gspca_dev *gspca_dev = priv; | |
1053 | int ret; | |
1054 | ||
63eb9546 JFM |
1055 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1056 | return -EINVAL; | |
e2997a72 HG |
1057 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1058 | return -ERESTARTSYS; | |
63eb9546 JFM |
1059 | if (!gspca_dev->present) { |
1060 | ret = -ENODEV; | |
1061 | goto out; | |
1062 | } | |
1063 | if (gspca_dev->nframes == 0) { | |
1064 | ret = -EINVAL; | |
1065 | goto out; | |
1066 | } | |
1067 | if (!gspca_dev->streaming) { | |
1068 | ret = gspca_init_transfer(gspca_dev); | |
1069 | if (ret < 0) | |
1070 | goto out; | |
1071 | } | |
d646e701 | 1072 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
63eb9546 JFM |
1073 | if (gspca_debug & D_STREAM) { |
1074 | PDEBUG_MODE("stream on OK", | |
1075 | gspca_dev->pixfmt, | |
1076 | gspca_dev->width, | |
1077 | gspca_dev->height); | |
1078 | } | |
1079 | #endif | |
e2997a72 | 1080 | ret = 0; |
63eb9546 JFM |
1081 | out: |
1082 | mutex_unlock(&gspca_dev->queue_lock); | |
1083 | return ret; | |
1084 | } | |
1085 | ||
1086 | static int vidioc_streamoff(struct file *file, void *priv, | |
1087 | enum v4l2_buf_type buf_type) | |
1088 | { | |
1089 | struct gspca_dev *gspca_dev = priv; | |
5b77ae77 | 1090 | int i, ret; |
63eb9546 | 1091 | |
63eb9546 JFM |
1092 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1093 | return -EINVAL; | |
4aa0d037 JFM |
1094 | if (!gspca_dev->streaming) |
1095 | return 0; | |
1096 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1097 | return -ERESTARTSYS; | |
5b77ae77 JFM |
1098 | |
1099 | /* stop streaming */ | |
4aa0d037 JFM |
1100 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { |
1101 | ret = -ERESTARTSYS; | |
1102 | goto out; | |
63eb9546 | 1103 | } |
4aa0d037 | 1104 | gspca_stream_off(gspca_dev); |
4aa0d037 | 1105 | mutex_unlock(&gspca_dev->usb_lock); |
5b77ae77 JFM |
1106 | |
1107 | /* empty the application queues */ | |
1108 | for (i = 0; i < gspca_dev->nframes; i++) | |
1109 | gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS; | |
1110 | gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0; | |
1111 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
1112 | gspca_dev->sequence = 0; | |
1113 | atomic_set(&gspca_dev->nevent, 0); | |
1114 | ret = 0; | |
4aa0d037 JFM |
1115 | out: |
1116 | mutex_unlock(&gspca_dev->queue_lock); | |
1117 | return ret; | |
63eb9546 JFM |
1118 | } |
1119 | ||
1120 | static int vidioc_g_jpegcomp(struct file *file, void *priv, | |
1121 | struct v4l2_jpegcompression *jpegcomp) | |
1122 | { | |
1123 | struct gspca_dev *gspca_dev = priv; | |
1124 | int ret; | |
1125 | ||
1126 | if (!gspca_dev->sd_desc->get_jcomp) | |
1127 | return -EINVAL; | |
e2997a72 HG |
1128 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1129 | return -ERESTARTSYS; | |
63eb9546 JFM |
1130 | ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); |
1131 | mutex_unlock(&gspca_dev->usb_lock); | |
1132 | return ret; | |
1133 | } | |
1134 | ||
1135 | static int vidioc_s_jpegcomp(struct file *file, void *priv, | |
1136 | struct v4l2_jpegcompression *jpegcomp) | |
1137 | { | |
1138 | struct gspca_dev *gspca_dev = priv; | |
1139 | int ret; | |
1140 | ||
e2997a72 HG |
1141 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1142 | return -ERESTARTSYS; | |
63eb9546 JFM |
1143 | if (!gspca_dev->sd_desc->set_jcomp) |
1144 | return -EINVAL; | |
1145 | ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); | |
1146 | mutex_unlock(&gspca_dev->usb_lock); | |
1147 | return ret; | |
1148 | } | |
1149 | ||
1150 | static int vidioc_g_parm(struct file *filp, void *priv, | |
1151 | struct v4l2_streamparm *parm) | |
1152 | { | |
1153 | struct gspca_dev *gspca_dev = priv; | |
1154 | ||
6a7eba24 | 1155 | memset(parm, 0, sizeof *parm); |
63eb9546 JFM |
1156 | parm->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
1157 | parm->parm.capture.readbuffers = gspca_dev->nbufread; | |
1158 | return 0; | |
1159 | } | |
1160 | ||
1161 | static int vidioc_s_parm(struct file *filp, void *priv, | |
1162 | struct v4l2_streamparm *parm) | |
1163 | { | |
1164 | struct gspca_dev *gspca_dev = priv; | |
1165 | int n; | |
1166 | ||
63eb9546 JFM |
1167 | n = parm->parm.capture.readbuffers; |
1168 | if (n == 0 || n > GSPCA_MAX_FRAMES) | |
1169 | parm->parm.capture.readbuffers = gspca_dev->nbufread; | |
1170 | else | |
1171 | gspca_dev->nbufread = n; | |
63eb9546 JFM |
1172 | return 0; |
1173 | } | |
1174 | ||
6a7eba24 JFM |
1175 | static int vidioc_s_std(struct file *filp, void *priv, |
1176 | v4l2_std_id *parm) | |
1177 | { | |
1178 | return 0; | |
1179 | } | |
1180 | ||
63eb9546 JFM |
1181 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
1182 | static int vidiocgmbuf(struct file *file, void *priv, | |
1183 | struct video_mbuf *mbuf) | |
1184 | { | |
1185 | struct gspca_dev *gspca_dev = file->private_data; | |
1186 | int i; | |
1187 | ||
1188 | PDEBUG(D_STREAM, "cgmbuf"); | |
1189 | if (gspca_dev->nframes == 0) { | |
63eb9546 | 1190 | int ret; |
6a7eba24 JFM |
1191 | |
1192 | { | |
1193 | struct v4l2_format fmt; | |
1194 | ||
1195 | memset(&fmt, 0, sizeof fmt); | |
1196 | fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1197 | i = gspca_dev->cam.nmodes - 1; /* highest mode */ | |
1198 | fmt.fmt.pix.width = gspca_dev->cam.cam_mode[i].width; | |
1199 | fmt.fmt.pix.height = gspca_dev->cam.cam_mode[i].height; | |
1200 | fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR24; | |
e078770a | 1201 | ret = vidioc_s_fmt_vid_cap(file, priv, &fmt); |
6a7eba24 JFM |
1202 | if (ret != 0) |
1203 | return ret; | |
1204 | } | |
1205 | { | |
1206 | struct v4l2_requestbuffers rb; | |
1207 | ||
1208 | memset(&rb, 0, sizeof rb); | |
1209 | rb.count = 4; | |
1210 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1211 | rb.memory = V4L2_MEMORY_MMAP; | |
1212 | ret = vidioc_reqbufs(file, priv, &rb); | |
1213 | if (ret != 0) | |
1214 | return ret; | |
1215 | } | |
63eb9546 JFM |
1216 | } |
1217 | mbuf->frames = gspca_dev->nframes; | |
1218 | mbuf->size = gspca_dev->frsz * gspca_dev->nframes; | |
1219 | for (i = 0; i < mbuf->frames; i++) | |
1220 | mbuf->offsets[i] = gspca_dev->frame[i].v4l2_buf.m.offset; | |
1221 | return 0; | |
1222 | } | |
1223 | #endif | |
1224 | ||
1225 | static int dev_mmap(struct file *file, struct vm_area_struct *vma) | |
1226 | { | |
1227 | struct gspca_dev *gspca_dev = file->private_data; | |
efab8211 | 1228 | struct gspca_frame *frame; |
63eb9546 JFM |
1229 | struct page *page; |
1230 | unsigned long addr, start, size; | |
1231 | int i, ret; | |
63eb9546 JFM |
1232 | |
1233 | start = vma->vm_start; | |
1234 | size = vma->vm_end - vma->vm_start; | |
1235 | PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size); | |
1236 | ||
e2997a72 HG |
1237 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1238 | return -ERESTARTSYS; | |
63eb9546 JFM |
1239 | if (!gspca_dev->present) { |
1240 | ret = -ENODEV; | |
4aa0d037 JFM |
1241 | goto out; |
1242 | } | |
1243 | if (gspca_dev->capt_file != file) { | |
1244 | ret = -EINVAL; | |
1245 | goto out; | |
63eb9546 JFM |
1246 | } |
1247 | ||
efab8211 | 1248 | frame = NULL; |
63eb9546 JFM |
1249 | for (i = 0; i < gspca_dev->nframes; ++i) { |
1250 | if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) { | |
1251 | PDEBUG(D_STREAM, "mmap bad memory type"); | |
1252 | break; | |
1253 | } | |
1254 | if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT) | |
1255 | == vma->vm_pgoff) { | |
1256 | frame = &gspca_dev->frame[i]; | |
1257 | break; | |
1258 | } | |
1259 | } | |
efab8211 | 1260 | if (frame == NULL) { |
63eb9546 JFM |
1261 | PDEBUG(D_STREAM, "mmap no frame buffer found"); |
1262 | ret = -EINVAL; | |
4aa0d037 | 1263 | goto out; |
63eb9546 JFM |
1264 | } |
1265 | #ifdef CONFIG_VIDEO_V4L1_COMPAT | |
ac0d6df6 JFM |
1266 | /* v4l1 maps all the buffers */ |
1267 | if (i != 0 | |
1268 | || size != frame->v4l2_buf.length * gspca_dev->nframes) | |
63eb9546 | 1269 | #endif |
ac0d6df6 | 1270 | if (size != frame->v4l2_buf.length) { |
63eb9546 JFM |
1271 | PDEBUG(D_STREAM, "mmap bad size"); |
1272 | ret = -EINVAL; | |
4aa0d037 | 1273 | goto out; |
63eb9546 JFM |
1274 | } |
1275 | ||
1276 | /* | |
1277 | * - VM_IO marks the area as being a mmaped region for I/O to a | |
1278 | * device. It also prevents the region from being core dumped. | |
1279 | */ | |
1280 | vma->vm_flags |= VM_IO; | |
1281 | ||
1282 | addr = (unsigned long) frame->data; | |
1283 | while (size > 0) { | |
1284 | page = vmalloc_to_page((void *) addr); | |
1285 | ret = vm_insert_page(vma, start, page); | |
1286 | if (ret < 0) | |
4aa0d037 | 1287 | goto out; |
63eb9546 JFM |
1288 | start += PAGE_SIZE; |
1289 | addr += PAGE_SIZE; | |
1290 | size -= PAGE_SIZE; | |
1291 | } | |
1292 | ||
1293 | vma->vm_ops = &gspca_vm_ops; | |
1294 | vma->vm_private_data = frame; | |
1295 | gspca_vm_open(vma); | |
e2997a72 | 1296 | ret = 0; |
4aa0d037 | 1297 | out: |
63eb9546 JFM |
1298 | mutex_unlock(&gspca_dev->queue_lock); |
1299 | return ret; | |
1300 | } | |
1301 | ||
63eb9546 JFM |
1302 | /* |
1303 | * wait for a video frame | |
1304 | * | |
1305 | * If a frame is ready, its index is returned. | |
1306 | */ | |
d43fa32f | 1307 | static int frame_wait(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1308 | int nonblock_ing) |
1309 | { | |
1310 | struct gspca_frame *frame; | |
1311 | int i, j, ret; | |
1312 | ||
d43fa32f | 1313 | /* check if a frame is ready */ |
63eb9546 JFM |
1314 | i = gspca_dev->fr_o; |
1315 | j = gspca_dev->fr_queue[i]; | |
1316 | frame = &gspca_dev->frame[j]; | |
82643d0e JFM |
1317 | if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) { |
1318 | atomic_dec(&gspca_dev->nevent); | |
63eb9546 | 1319 | goto ok; |
82643d0e | 1320 | } |
63eb9546 JFM |
1321 | if (nonblock_ing) /* no frame yet */ |
1322 | return -EAGAIN; | |
1323 | ||
1324 | /* wait till a frame is ready */ | |
1325 | for (;;) { | |
4aa0d037 JFM |
1326 | ret = wait_event_interruptible_timeout(gspca_dev->wq, |
1327 | atomic_read(&gspca_dev->nevent) > 0, | |
1328 | msecs_to_jiffies(3000)); | |
1329 | if (ret <= 0) { | |
1330 | if (ret < 0) | |
82643d0e JFM |
1331 | return ret; /* interrupt */ |
1332 | return -EIO; /* timeout */ | |
4aa0d037 | 1333 | } |
82643d0e | 1334 | atomic_dec(&gspca_dev->nevent); |
e2997a72 HG |
1335 | if (!gspca_dev->streaming || !gspca_dev->present) |
1336 | return -EIO; | |
63eb9546 JFM |
1337 | i = gspca_dev->fr_o; |
1338 | j = gspca_dev->fr_queue[i]; | |
1339 | frame = &gspca_dev->frame[j]; | |
1340 | if (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) | |
1341 | break; | |
1342 | } | |
63eb9546 | 1343 | ok: |
63eb9546 JFM |
1344 | gspca_dev->fr_o = (i + 1) % gspca_dev->nframes; |
1345 | PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d", | |
1346 | gspca_dev->fr_q, | |
1347 | gspca_dev->fr_i, | |
1348 | gspca_dev->fr_o); | |
e2997a72 | 1349 | |
739570bb JFM |
1350 | if (gspca_dev->sd_desc->dq_callback) { |
1351 | mutex_lock(&gspca_dev->usb_lock); | |
e2997a72 | 1352 | gspca_dev->sd_desc->dq_callback(gspca_dev); |
739570bb JFM |
1353 | mutex_unlock(&gspca_dev->usb_lock); |
1354 | } | |
63eb9546 JFM |
1355 | return j; |
1356 | } | |
1357 | ||
1358 | /* | |
1359 | * dequeue a video buffer | |
1360 | * | |
1361 | * If nonblock_ing is false, block until a buffer is available. | |
1362 | */ | |
1363 | static int vidioc_dqbuf(struct file *file, void *priv, | |
1364 | struct v4l2_buffer *v4l2_buf) | |
1365 | { | |
1366 | struct gspca_dev *gspca_dev = priv; | |
1367 | struct gspca_frame *frame; | |
1368 | int i, ret; | |
1369 | ||
1370 | PDEBUG(D_FRAM, "dqbuf"); | |
ac0d6df6 JFM |
1371 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1372 | return -EINVAL; | |
1373 | if (v4l2_buf->memory != gspca_dev->memory) | |
63eb9546 | 1374 | return -EINVAL; |
5b77ae77 JFM |
1375 | |
1376 | /* if not streaming, be sure the application will not loop forever */ | |
1377 | if (!(file->f_flags & O_NONBLOCK) | |
1378 | && !gspca_dev->streaming && gspca_dev->users == 1) | |
63eb9546 JFM |
1379 | return -EINVAL; |
1380 | ||
5b77ae77 JFM |
1381 | /* only the capturing file may dequeue */ |
1382 | if (gspca_dev->capt_file != file) | |
1383 | return -EINVAL; | |
1384 | ||
1385 | /* only one dequeue / read at a time */ | |
63eb9546 JFM |
1386 | if (mutex_lock_interruptible(&gspca_dev->read_lock)) |
1387 | return -ERESTARTSYS; | |
1388 | ||
d43fa32f | 1389 | ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK); |
63eb9546 | 1390 | if (ret < 0) |
4aa0d037 | 1391 | goto out; |
63eb9546 JFM |
1392 | i = ret; /* frame index */ |
1393 | frame = &gspca_dev->frame[i]; | |
ac0d6df6 JFM |
1394 | if (gspca_dev->memory == V4L2_MEMORY_USERPTR) { |
1395 | if (copy_to_user((__u8 *) frame->v4l2_buf.m.userptr, | |
1396 | frame->data, | |
1397 | frame->v4l2_buf.bytesused)) { | |
1398 | PDEBUG(D_ERR|D_STREAM, | |
1399 | "dqbuf cp to user failed"); | |
1400 | ret = -EFAULT; | |
1401 | goto out; | |
1402 | } | |
1403 | } | |
63eb9546 JFM |
1404 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; |
1405 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1406 | PDEBUG(D_FRAM, "dqbuf %d", i); | |
1407 | ret = 0; | |
4aa0d037 | 1408 | out: |
63eb9546 JFM |
1409 | mutex_unlock(&gspca_dev->read_lock); |
1410 | return ret; | |
1411 | } | |
1412 | ||
1413 | /* | |
1414 | * queue a video buffer | |
1415 | * | |
1416 | * Attempting to queue a buffer that has already been | |
1417 | * queued will return -EINVAL. | |
1418 | */ | |
1419 | static int vidioc_qbuf(struct file *file, void *priv, | |
1420 | struct v4l2_buffer *v4l2_buf) | |
1421 | { | |
1422 | struct gspca_dev *gspca_dev = priv; | |
1423 | struct gspca_frame *frame; | |
1424 | int i, index, ret; | |
1425 | ||
1426 | PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index); | |
1427 | if (v4l2_buf->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1428 | return -EINVAL; | |
1429 | ||
5b77ae77 JFM |
1430 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1431 | return -ERESTARTSYS; | |
1432 | ||
63eb9546 JFM |
1433 | index = v4l2_buf->index; |
1434 | if ((unsigned) index >= gspca_dev->nframes) { | |
d43fa32f | 1435 | PDEBUG(D_FRAM, |
63eb9546 | 1436 | "qbuf idx %d >= %d", index, gspca_dev->nframes); |
5b77ae77 JFM |
1437 | ret = -EINVAL; |
1438 | goto out; | |
63eb9546 | 1439 | } |
5b77ae77 | 1440 | if (v4l2_buf->memory != gspca_dev->memory) { |
d43fa32f | 1441 | PDEBUG(D_FRAM, "qbuf bad memory type"); |
5b77ae77 JFM |
1442 | ret = -EINVAL; |
1443 | goto out; | |
63eb9546 | 1444 | } |
e2997a72 | 1445 | |
5b77ae77 | 1446 | frame = &gspca_dev->frame[index]; |
d43fa32f JFM |
1447 | if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) { |
1448 | PDEBUG(D_FRAM, "qbuf bad state"); | |
63eb9546 JFM |
1449 | ret = -EINVAL; |
1450 | goto out; | |
1451 | } | |
1452 | ||
1453 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED; | |
d43fa32f | 1454 | /* frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; */ |
63eb9546 | 1455 | |
d43fa32f | 1456 | if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) { |
63eb9546 JFM |
1457 | frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr; |
1458 | frame->v4l2_buf.length = v4l2_buf->length; | |
1459 | } | |
1460 | ||
1461 | /* put the buffer in the 'queued' queue */ | |
1462 | i = gspca_dev->fr_q; | |
1463 | gspca_dev->fr_queue[i] = index; | |
1464 | gspca_dev->fr_q = (i + 1) % gspca_dev->nframes; | |
1465 | PDEBUG(D_FRAM, "qbuf q:%d i:%d o:%d", | |
1466 | gspca_dev->fr_q, | |
1467 | gspca_dev->fr_i, | |
1468 | gspca_dev->fr_o); | |
1469 | ||
1470 | v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED; | |
1471 | v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE; | |
1472 | ret = 0; | |
1473 | out: | |
1474 | mutex_unlock(&gspca_dev->queue_lock); | |
1475 | return ret; | |
1476 | } | |
1477 | ||
d43fa32f JFM |
1478 | /* |
1479 | * allocate the resources for read() | |
1480 | */ | |
1481 | static int read_alloc(struct gspca_dev *gspca_dev, | |
1482 | struct file *file) | |
63eb9546 | 1483 | { |
63eb9546 | 1484 | struct v4l2_buffer v4l2_buf; |
d43fa32f | 1485 | int i, ret; |
63eb9546 | 1486 | |
d43fa32f | 1487 | PDEBUG(D_STREAM, "read alloc"); |
63eb9546 JFM |
1488 | if (gspca_dev->nframes == 0) { |
1489 | struct v4l2_requestbuffers rb; | |
1490 | ||
1491 | memset(&rb, 0, sizeof rb); | |
1492 | rb.count = gspca_dev->nbufread; | |
1493 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1494 | rb.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1495 | ret = vidioc_reqbufs(file, gspca_dev, &rb); |
1496 | if (ret != 0) { | |
d43fa32f | 1497 | PDEBUG(D_STREAM, "read reqbuf err %d", ret); |
63eb9546 JFM |
1498 | return ret; |
1499 | } | |
1500 | memset(&v4l2_buf, 0, sizeof v4l2_buf); | |
1501 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1502 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1503 | for (i = 0; i < gspca_dev->nbufread; i++) { |
1504 | v4l2_buf.index = i; | |
63eb9546 JFM |
1505 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); |
1506 | if (ret != 0) { | |
1507 | PDEBUG(D_STREAM, "read qbuf err: %d", ret); | |
1508 | return ret; | |
1509 | } | |
1510 | } | |
d43fa32f JFM |
1511 | gspca_dev->memory = GSPCA_MEMORY_READ; |
1512 | } | |
4aa0d037 | 1513 | |
d43fa32f JFM |
1514 | /* start streaming */ |
1515 | ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE); | |
1516 | if (ret != 0) | |
1517 | PDEBUG(D_STREAM, "read streamon err %d", ret); | |
1518 | return ret; | |
1519 | } | |
1520 | ||
1521 | static unsigned int dev_poll(struct file *file, poll_table *wait) | |
1522 | { | |
1523 | struct gspca_dev *gspca_dev = file->private_data; | |
1524 | int i, ret; | |
1525 | ||
1526 | PDEBUG(D_FRAM, "poll"); | |
1527 | ||
1528 | poll_wait(file, &gspca_dev->wq, wait); | |
1529 | if (!gspca_dev->present) | |
1530 | return POLLERR; | |
1531 | ||
5b77ae77 JFM |
1532 | /* if reqbufs is not done, the user would use read() */ |
1533 | if (gspca_dev->nframes == 0) { | |
1534 | if (gspca_dev->memory != GSPCA_MEMORY_NO) | |
1535 | return POLLERR; /* not the 1st time */ | |
d43fa32f | 1536 | ret = read_alloc(gspca_dev, file); |
5b77ae77 JFM |
1537 | if (ret != 0) |
1538 | return POLLERR; | |
63eb9546 JFM |
1539 | } |
1540 | ||
d43fa32f JFM |
1541 | if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) |
1542 | return POLLERR; | |
1543 | if (!gspca_dev->present) { | |
1544 | ret = POLLERR; | |
1545 | goto out; | |
1546 | } | |
1547 | ||
5b77ae77 | 1548 | /* check the next incoming buffer */ |
d43fa32f JFM |
1549 | i = gspca_dev->fr_o; |
1550 | i = gspca_dev->fr_queue[i]; | |
1551 | if (gspca_dev->frame[i].v4l2_buf.flags & V4L2_BUF_FLAG_DONE) | |
1552 | ret = POLLIN | POLLRDNORM; /* something to read */ | |
1553 | else | |
1554 | ret = 0; | |
1555 | out: | |
1556 | mutex_unlock(&gspca_dev->queue_lock); | |
1557 | return ret; | |
1558 | } | |
1559 | ||
1560 | static ssize_t dev_read(struct file *file, char __user *data, | |
1561 | size_t count, loff_t *ppos) | |
1562 | { | |
1563 | struct gspca_dev *gspca_dev = file->private_data; | |
1564 | struct gspca_frame *frame; | |
1565 | struct v4l2_buffer v4l2_buf; | |
1566 | struct timeval timestamp; | |
82643d0e | 1567 | int n, ret, ret2; |
d43fa32f | 1568 | |
a9e11134 | 1569 | PDEBUG(D_FRAM, "read (%zd)", count); |
d43fa32f JFM |
1570 | if (!gspca_dev->present) |
1571 | return -ENODEV; | |
1572 | switch (gspca_dev->memory) { | |
1573 | case GSPCA_MEMORY_NO: /* first time */ | |
1574 | ret = read_alloc(gspca_dev, file); | |
1575 | if (ret != 0) | |
1576 | return ret; | |
1577 | break; | |
1578 | case GSPCA_MEMORY_READ: | |
82643d0e JFM |
1579 | if (gspca_dev->capt_file == file) |
1580 | break; | |
1581 | /* fall thru */ | |
d43fa32f JFM |
1582 | default: |
1583 | return -EINVAL; | |
1584 | } | |
1585 | ||
63eb9546 JFM |
1586 | /* get a frame */ |
1587 | jiffies_to_timeval(get_jiffies_64(), ×tamp); | |
1588 | timestamp.tv_sec--; | |
82643d0e JFM |
1589 | n = 2; |
1590 | for (;;) { | |
63eb9546 JFM |
1591 | memset(&v4l2_buf, 0, sizeof v4l2_buf); |
1592 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1593 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1594 | ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf); |
1595 | if (ret != 0) { | |
1596 | PDEBUG(D_STREAM, "read dqbuf err %d", ret); | |
1597 | return ret; | |
1598 | } | |
1599 | ||
1600 | /* if the process slept for more than 1 second, | |
82643d0e | 1601 | * get anewer frame */ |
63eb9546 | 1602 | frame = &gspca_dev->frame[v4l2_buf.index]; |
82643d0e JFM |
1603 | if (--n < 0) |
1604 | break; /* avoid infinite loop */ | |
63eb9546 JFM |
1605 | if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec) |
1606 | break; | |
1607 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1608 | if (ret != 0) { | |
1609 | PDEBUG(D_STREAM, "read qbuf err %d", ret); | |
1610 | return ret; | |
1611 | } | |
1612 | } | |
1613 | ||
1614 | /* copy the frame */ | |
ac0d6df6 JFM |
1615 | if (count > frame->v4l2_buf.bytesused) |
1616 | count = frame->v4l2_buf.bytesused; | |
63eb9546 JFM |
1617 | ret = copy_to_user(data, frame->data, count); |
1618 | if (ret != 0) { | |
1619 | PDEBUG(D_ERR|D_STREAM, | |
a9e11134 | 1620 | "read cp to user lack %d / %zd", ret, count); |
63eb9546 JFM |
1621 | ret = -EFAULT; |
1622 | goto out; | |
1623 | } | |
1624 | ret = count; | |
1625 | out: | |
1626 | /* in each case, requeue the buffer */ | |
1627 | ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1628 | if (ret2 != 0) | |
1629 | return ret2; | |
1630 | return ret; | |
1631 | } | |
1632 | ||
d43fa32f | 1633 | static void dev_release(struct video_device *vfd) |
63eb9546 JFM |
1634 | { |
1635 | /* nothing */ | |
1636 | } | |
1637 | ||
1638 | static struct file_operations dev_fops = { | |
1639 | .owner = THIS_MODULE, | |
1640 | .open = dev_open, | |
1641 | .release = dev_close, | |
1642 | .read = dev_read, | |
1643 | .mmap = dev_mmap, | |
1644 | .ioctl = video_ioctl2, | |
6a7eba24 JFM |
1645 | #ifdef CONFIG_COMPAT |
1646 | .compat_ioctl = v4l_compat_ioctl32, | |
1647 | #endif | |
63eb9546 JFM |
1648 | .llseek = no_llseek, |
1649 | .poll = dev_poll, | |
1650 | }; | |
1651 | ||
1652 | static struct video_device gspca_template = { | |
1653 | .name = "gspca main driver", | |
1654 | .type = VID_TYPE_CAPTURE, | |
1655 | .fops = &dev_fops, | |
d43fa32f | 1656 | .release = dev_release, /* mandatory */ |
63eb9546 JFM |
1657 | .minor = -1, |
1658 | .vidioc_querycap = vidioc_querycap, | |
1659 | .vidioc_dqbuf = vidioc_dqbuf, | |
1660 | .vidioc_qbuf = vidioc_qbuf, | |
e078770a MCC |
1661 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
1662 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
1663 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
1664 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
63eb9546 JFM |
1665 | .vidioc_streamon = vidioc_streamon, |
1666 | .vidioc_queryctrl = vidioc_queryctrl, | |
1667 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
1668 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
1669 | .vidioc_querymenu = vidioc_querymenu, | |
1670 | .vidioc_enum_input = vidioc_enum_input, | |
1671 | .vidioc_g_input = vidioc_g_input, | |
1672 | .vidioc_s_input = vidioc_s_input, | |
1673 | .vidioc_reqbufs = vidioc_reqbufs, | |
1674 | .vidioc_querybuf = vidioc_querybuf, | |
1675 | .vidioc_streamoff = vidioc_streamoff, | |
1676 | .vidioc_g_jpegcomp = vidioc_g_jpegcomp, | |
1677 | .vidioc_s_jpegcomp = vidioc_s_jpegcomp, | |
1678 | .vidioc_g_parm = vidioc_g_parm, | |
1679 | .vidioc_s_parm = vidioc_s_parm, | |
6a7eba24 | 1680 | .vidioc_s_std = vidioc_s_std, |
63eb9546 JFM |
1681 | #ifdef CONFIG_VIDEO_V4L1_COMPAT |
1682 | .vidiocgmbuf = vidiocgmbuf, | |
1683 | #endif | |
1684 | }; | |
1685 | ||
1686 | /* | |
1687 | * probe and create a new gspca device | |
1688 | * | |
1689 | * This function must be called by the sub-driver when it is | |
1690 | * called for probing a new device. | |
1691 | */ | |
1692 | int gspca_dev_probe(struct usb_interface *intf, | |
1693 | const struct usb_device_id *id, | |
1694 | const struct sd_desc *sd_desc, | |
d43fa32f JFM |
1695 | int dev_size, |
1696 | struct module *module) | |
63eb9546 JFM |
1697 | { |
1698 | struct usb_interface_descriptor *interface; | |
1699 | struct gspca_dev *gspca_dev; | |
1700 | struct usb_device *dev = interface_to_usbdev(intf); | |
1701 | int ret; | |
63eb9546 | 1702 | |
6a7eba24 | 1703 | PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct); |
63eb9546 JFM |
1704 | |
1705 | /* we don't handle multi-config cameras */ | |
1706 | if (dev->descriptor.bNumConfigurations != 1) | |
1707 | return -ENODEV; | |
1708 | interface = &intf->cur_altsetting->desc; | |
1709 | if (interface->bInterfaceNumber > 0) | |
1710 | return -ENODEV; | |
1711 | ||
1712 | /* create the device */ | |
1713 | if (dev_size < sizeof *gspca_dev) | |
1714 | dev_size = sizeof *gspca_dev; | |
1715 | gspca_dev = kzalloc(dev_size, GFP_KERNEL); | |
1716 | if (gspca_dev == NULL) { | |
1717 | err("couldn't kzalloc gspca struct"); | |
1718 | return -EIO; | |
1719 | } | |
1720 | gspca_dev->dev = dev; | |
1721 | gspca_dev->iface = interface->bInterfaceNumber; | |
d43fa32f | 1722 | gspca_dev->nbalt = intf->num_altsetting; |
63eb9546 JFM |
1723 | gspca_dev->sd_desc = sd_desc; |
1724 | /* gspca_dev->users = 0; (done by kzalloc) */ | |
1725 | gspca_dev->nbufread = 2; | |
1726 | ||
1727 | /* configure the subdriver */ | |
1728 | ret = gspca_dev->sd_desc->config(gspca_dev, id); | |
1729 | if (ret < 0) | |
1730 | goto out; | |
1731 | ret = gspca_set_alt0(gspca_dev); | |
1732 | if (ret < 0) | |
1733 | goto out; | |
1734 | gspca_set_default_mode(gspca_dev); | |
1735 | ||
1736 | mutex_init(&gspca_dev->usb_lock); | |
1737 | mutex_init(&gspca_dev->read_lock); | |
1738 | mutex_init(&gspca_dev->queue_lock); | |
1739 | init_waitqueue_head(&gspca_dev->wq); | |
1740 | ||
1741 | /* init video stuff */ | |
1742 | memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template); | |
5e85e732 | 1743 | gspca_dev->vdev.parent = &dev->dev; |
d43fa32f JFM |
1744 | memcpy(&gspca_dev->fops, &dev_fops, sizeof gspca_dev->fops); |
1745 | gspca_dev->vdev.fops = &gspca_dev->fops; | |
1746 | gspca_dev->fops.owner = module; /* module protection */ | |
63eb9546 JFM |
1747 | ret = video_register_device(&gspca_dev->vdev, |
1748 | VFL_TYPE_GRABBER, | |
1749 | video_nr); | |
1750 | if (ret < 0) { | |
1751 | err("video_register_device err %d", ret); | |
1752 | goto out; | |
1753 | } | |
1754 | ||
1755 | gspca_dev->present = 1; | |
1756 | usb_set_intfdata(intf, gspca_dev); | |
1757 | PDEBUG(D_PROBE, "probe ok"); | |
1758 | return 0; | |
1759 | out: | |
1760 | kfree(gspca_dev); | |
1761 | return ret; | |
1762 | } | |
1763 | EXPORT_SYMBOL(gspca_dev_probe); | |
1764 | ||
1765 | /* | |
1766 | * USB disconnection | |
1767 | * | |
1768 | * This function must be called by the sub-driver | |
1769 | * when the device disconnects, after the specific resources are freed. | |
1770 | */ | |
1771 | void gspca_disconnect(struct usb_interface *intf) | |
1772 | { | |
4aa0d037 | 1773 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
63eb9546 JFM |
1774 | |
1775 | if (!gspca_dev) | |
1776 | return; | |
1777 | gspca_dev->present = 0; | |
e2997a72 HG |
1778 | mutex_lock(&gspca_dev->queue_lock); |
1779 | mutex_lock(&gspca_dev->usb_lock); | |
1780 | gspca_dev->streaming = 0; | |
d43fa32f | 1781 | destroy_urbs(gspca_dev); |
63eb9546 | 1782 | mutex_unlock(&gspca_dev->usb_lock); |
e2997a72 | 1783 | mutex_unlock(&gspca_dev->queue_lock); |
63eb9546 JFM |
1784 | while (gspca_dev->users != 0) { /* wait until fully closed */ |
1785 | atomic_inc(&gspca_dev->nevent); | |
1786 | wake_up_interruptible(&gspca_dev->wq); /* wake processes */ | |
1787 | schedule(); | |
1788 | } | |
1789 | /* We don't want people trying to open up the device */ | |
1790 | video_unregister_device(&gspca_dev->vdev); | |
1791 | /* Free the memory */ | |
1792 | kfree(gspca_dev); | |
1793 | PDEBUG(D_PROBE, "disconnect complete"); | |
1794 | } | |
1795 | EXPORT_SYMBOL(gspca_disconnect); | |
1796 | ||
dcef3237 HG |
1797 | /* -- cam driver utility functions -- */ |
1798 | ||
1799 | /* auto gain and exposure algorithm based on the knee algorithm described here: | |
1800 | http://ytse.tricolour.net/docs/LowLightOptimization.html | |
1801 | ||
1802 | Returns 0 if no changes were made, 1 if the gain and or exposure settings | |
1803 | where changed. */ | |
1804 | int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum, | |
1805 | int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee) | |
1806 | { | |
1807 | int i, steps, gain, orig_gain, exposure, orig_exposure, autogain; | |
1808 | const struct ctrl *gain_ctrl = NULL; | |
1809 | const struct ctrl *exposure_ctrl = NULL; | |
1810 | const struct ctrl *autogain_ctrl = NULL; | |
1811 | int retval = 0; | |
1812 | ||
1813 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
1814 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN) | |
1815 | gain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
1816 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE) | |
1817 | exposure_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
1818 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN) | |
1819 | autogain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
1820 | } | |
1821 | if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) { | |
1822 | PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called " | |
1823 | "on cam without (auto)gain/exposure"); | |
1824 | return 0; | |
1825 | } | |
1826 | ||
1827 | if (gain_ctrl->get(gspca_dev, &gain) || | |
1828 | exposure_ctrl->get(gspca_dev, &exposure) || | |
1829 | autogain_ctrl->get(gspca_dev, &autogain) || !autogain) | |
1830 | return 0; | |
1831 | ||
1832 | orig_gain = gain; | |
1833 | orig_exposure = exposure; | |
1834 | ||
1835 | /* If we are of a multiple of deadzone, do multiple steps to reach the | |
1836 | desired lumination fast (with the risc of a slight overshoot) */ | |
1837 | steps = abs(desired_avg_lum - avg_lum) / deadzone; | |
1838 | ||
1839 | PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d\n", | |
1840 | avg_lum, desired_avg_lum, steps); | |
1841 | ||
1842 | for (i = 0; i < steps; i++) { | |
1843 | if (avg_lum > desired_avg_lum) { | |
1844 | if (gain > gain_knee) | |
1845 | gain--; | |
1846 | else if (exposure > exposure_knee) | |
1847 | exposure--; | |
1848 | else if (gain > gain_ctrl->qctrl.default_value) | |
1849 | gain--; | |
1850 | else if (exposure > exposure_ctrl->qctrl.minimum) | |
1851 | exposure--; | |
1852 | else if (gain > gain_ctrl->qctrl.minimum) | |
1853 | gain--; | |
1854 | else | |
1855 | break; | |
1856 | } else { | |
1857 | if (gain < gain_ctrl->qctrl.default_value) | |
1858 | gain++; | |
1859 | else if (exposure < exposure_knee) | |
1860 | exposure++; | |
1861 | else if (gain < gain_knee) | |
1862 | gain++; | |
1863 | else if (exposure < exposure_ctrl->qctrl.maximum) | |
1864 | exposure++; | |
1865 | else if (gain < gain_ctrl->qctrl.maximum) | |
1866 | gain++; | |
1867 | else | |
1868 | break; | |
1869 | } | |
1870 | } | |
1871 | ||
1872 | if (gain != orig_gain) { | |
1873 | gain_ctrl->set(gspca_dev, gain); | |
1874 | retval = 1; | |
1875 | } | |
1876 | if (exposure != orig_exposure) { | |
1877 | exposure_ctrl->set(gspca_dev, exposure); | |
1878 | retval = 1; | |
1879 | } | |
1880 | ||
1881 | return retval; | |
1882 | } | |
1883 | EXPORT_SYMBOL(gspca_auto_gain_n_exposure); | |
1884 | ||
63eb9546 JFM |
1885 | /* -- module insert / remove -- */ |
1886 | static int __init gspca_init(void) | |
1887 | { | |
1888 | info("main v%s registered", version); | |
1889 | return 0; | |
1890 | } | |
1891 | static void __exit gspca_exit(void) | |
1892 | { | |
1893 | info("main deregistered"); | |
1894 | } | |
1895 | ||
1896 | module_init(gspca_init); | |
1897 | module_exit(gspca_exit); | |
1898 | ||
d646e701 | 1899 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
63eb9546 JFM |
1900 | module_param_named(debug, gspca_debug, int, 0644); |
1901 | MODULE_PARM_DESC(debug, | |
1902 | "Debug (bit) 0x01:error 0x02:probe 0x04:config" | |
d43fa32f JFM |
1903 | " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout" |
1904 | " 0x0100: v4l2"); | |
6a7eba24 | 1905 | #endif |