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Commit | Line | Data |
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63eb9546 JFM |
1 | /* |
2 | * Main USB camera driver | |
3 | * | |
27c6f9e5 | 4 | * Copyright (C) 2008-2010 Jean-François Moine <http://moinejf.free.fr> |
63eb9546 | 5 | * |
0274d42e MN |
6 | * Camera button input handling by Márton Németh |
7 | * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu> | |
8 | * | |
63eb9546 JFM |
9 | * This program is free software; you can redistribute it and/or modify it |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2 of the License, or (at your | |
12 | * option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
16 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
17 | * for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software Foundation, | |
21 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | */ | |
23 | ||
24 | #define MODULE_NAME "gspca" | |
25 | ||
26 | #include <linux/init.h> | |
cf0fe08d | 27 | #include <linux/version.h> |
63eb9546 JFM |
28 | #include <linux/fs.h> |
29 | #include <linux/vmalloc.h> | |
30 | #include <linux/sched.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/mm.h> | |
33 | #include <linux/string.h> | |
34 | #include <linux/pagemap.h> | |
956e42d2 | 35 | #include <linux/io.h> |
63eb9546 | 36 | #include <asm/page.h> |
956e42d2 | 37 | #include <linux/uaccess.h> |
2f51d00f | 38 | #include <linux/ktime.h> |
35ea11ff | 39 | #include <media/v4l2-ioctl.h> |
63eb9546 JFM |
40 | |
41 | #include "gspca.h" | |
42 | ||
f7628015 | 43 | #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) |
0274d42e MN |
44 | #include <linux/input.h> |
45 | #include <linux/usb/input.h> | |
e070bf9e | 46 | #endif |
0274d42e | 47 | |
d43fa32f | 48 | /* global values */ |
8fee8453 JFM |
49 | #define DEF_NURBS 3 /* default number of URBs */ |
50 | #if DEF_NURBS > MAX_NURBS | |
51 | #error "DEF_NURBS too big" | |
52 | #endif | |
d43fa32f | 53 | |
27c6f9e5 | 54 | MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>"); |
63eb9546 JFM |
55 | MODULE_DESCRIPTION("GSPCA USB Camera Driver"); |
56 | MODULE_LICENSE("GPL"); | |
57 | ||
30d4554a | 58 | #define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 10, 0) |
63eb9546 | 59 | |
335b3f88 | 60 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
61 | int gspca_debug = D_ERR | D_PROBE; |
62 | EXPORT_SYMBOL(gspca_debug); | |
63 | ||
64 | static void PDEBUG_MODE(char *txt, __u32 pixfmt, int w, int h) | |
65 | { | |
66 | if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') { | |
67 | PDEBUG(D_CONF|D_STREAM, "%s %c%c%c%c %dx%d", | |
68 | txt, | |
69 | pixfmt & 0xff, | |
70 | (pixfmt >> 8) & 0xff, | |
71 | (pixfmt >> 16) & 0xff, | |
72 | pixfmt >> 24, | |
73 | w, h); | |
74 | } else { | |
75 | PDEBUG(D_CONF|D_STREAM, "%s 0x%08x %dx%d", | |
76 | txt, | |
77 | pixfmt, | |
78 | w, h); | |
79 | } | |
80 | } | |
81 | #else | |
82 | #define PDEBUG_MODE(txt, pixfmt, w, h) | |
83 | #endif | |
84 | ||
77ee3318 | 85 | /* specific memory types - !! should be different from V4L2_MEMORY_xxx */ |
d43fa32f JFM |
86 | #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */ |
87 | #define GSPCA_MEMORY_READ 7 | |
88 | ||
d43fa32f | 89 | #define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE) |
d43fa32f | 90 | |
63eb9546 JFM |
91 | /* |
92 | * VMA operations. | |
93 | */ | |
94 | static void gspca_vm_open(struct vm_area_struct *vma) | |
95 | { | |
96 | struct gspca_frame *frame = vma->vm_private_data; | |
97 | ||
98 | frame->vma_use_count++; | |
99 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED; | |
100 | } | |
101 | ||
102 | static void gspca_vm_close(struct vm_area_struct *vma) | |
103 | { | |
104 | struct gspca_frame *frame = vma->vm_private_data; | |
105 | ||
106 | if (--frame->vma_use_count <= 0) | |
107 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED; | |
108 | } | |
109 | ||
f0f37e2f | 110 | static const struct vm_operations_struct gspca_vm_ops = { |
63eb9546 JFM |
111 | .open = gspca_vm_open, |
112 | .close = gspca_vm_close, | |
113 | }; | |
114 | ||
0274d42e MN |
115 | /* |
116 | * Input and interrupt endpoint handling functions | |
117 | */ | |
f7628015 | 118 | #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) |
0274d42e MN |
119 | static void int_irq(struct urb *urb) |
120 | { | |
121 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
122 | int ret; | |
123 | ||
124 | ret = urb->status; | |
125 | switch (ret) { | |
126 | case 0: | |
127 | if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev, | |
128 | urb->transfer_buffer, urb->actual_length) < 0) { | |
129 | PDEBUG(D_ERR, "Unknown packet received"); | |
130 | } | |
131 | break; | |
132 | ||
133 | case -ENOENT: | |
134 | case -ECONNRESET: | |
135 | case -ENODEV: | |
136 | case -ESHUTDOWN: | |
137 | /* Stop is requested either by software or hardware is gone, | |
138 | * keep the ret value non-zero and don't resubmit later. | |
139 | */ | |
140 | break; | |
141 | ||
142 | default: | |
143 | PDEBUG(D_ERR, "URB error %i, resubmitting", urb->status); | |
144 | urb->status = 0; | |
145 | ret = 0; | |
146 | } | |
147 | ||
148 | if (ret == 0) { | |
149 | ret = usb_submit_urb(urb, GFP_ATOMIC); | |
150 | if (ret < 0) | |
151 | PDEBUG(D_ERR, "Resubmit URB failed with error %i", ret); | |
152 | } | |
153 | } | |
154 | ||
155 | static int gspca_input_connect(struct gspca_dev *dev) | |
156 | { | |
157 | struct input_dev *input_dev; | |
158 | int err = 0; | |
159 | ||
160 | dev->input_dev = NULL; | |
ac82f59f | 161 | if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) { |
0274d42e MN |
162 | input_dev = input_allocate_device(); |
163 | if (!input_dev) | |
164 | return -ENOMEM; | |
165 | ||
166 | usb_make_path(dev->dev, dev->phys, sizeof(dev->phys)); | |
167 | strlcat(dev->phys, "/input0", sizeof(dev->phys)); | |
168 | ||
169 | input_dev->name = dev->sd_desc->name; | |
170 | input_dev->phys = dev->phys; | |
171 | ||
172 | usb_to_input_id(dev->dev, &input_dev->id); | |
173 | ||
174 | input_dev->evbit[0] = BIT_MASK(EV_KEY); | |
175 | input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA); | |
176 | input_dev->dev.parent = &dev->dev->dev; | |
177 | ||
178 | err = input_register_device(input_dev); | |
179 | if (err) { | |
180 | PDEBUG(D_ERR, "Input device registration failed " | |
181 | "with error %i", err); | |
182 | input_dev->dev.parent = NULL; | |
183 | input_free_device(input_dev); | |
184 | } else { | |
185 | dev->input_dev = input_dev; | |
186 | } | |
10ee2402 | 187 | } |
0274d42e MN |
188 | |
189 | return err; | |
190 | } | |
191 | ||
192 | static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev, | |
193 | struct usb_endpoint_descriptor *ep) | |
194 | { | |
195 | unsigned int buffer_len; | |
196 | int interval; | |
197 | struct urb *urb; | |
198 | struct usb_device *dev; | |
199 | void *buffer = NULL; | |
200 | int ret = -EINVAL; | |
201 | ||
b26d6e21 | 202 | buffer_len = le16_to_cpu(ep->wMaxPacketSize); |
0274d42e | 203 | interval = ep->bInterval; |
c4dc692c | 204 | PDEBUG(D_CONF, "found int in endpoint: 0x%x, " |
0274d42e MN |
205 | "buffer_len=%u, interval=%u", |
206 | ep->bEndpointAddress, buffer_len, interval); | |
207 | ||
208 | dev = gspca_dev->dev; | |
209 | ||
210 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
211 | if (!urb) { | |
212 | ret = -ENOMEM; | |
213 | goto error; | |
214 | } | |
215 | ||
7a9b1492 | 216 | buffer = usb_alloc_coherent(dev, buffer_len, |
0274d42e MN |
217 | GFP_KERNEL, &urb->transfer_dma); |
218 | if (!buffer) { | |
219 | ret = -ENOMEM; | |
220 | goto error_buffer; | |
221 | } | |
222 | usb_fill_int_urb(urb, dev, | |
223 | usb_rcvintpipe(dev, ep->bEndpointAddress), | |
224 | buffer, buffer_len, | |
225 | int_irq, (void *)gspca_dev, interval); | |
226 | gspca_dev->int_urb = urb; | |
227 | ret = usb_submit_urb(urb, GFP_KERNEL); | |
228 | if (ret < 0) { | |
c4dc692c | 229 | PDEBUG(D_ERR, "submit int URB failed with error %i", ret); |
0274d42e MN |
230 | goto error_submit; |
231 | } | |
232 | return ret; | |
233 | ||
234 | error_submit: | |
997ea58e DM |
235 | usb_free_coherent(dev, |
236 | urb->transfer_buffer_length, | |
237 | urb->transfer_buffer, | |
238 | urb->transfer_dma); | |
0274d42e MN |
239 | error_buffer: |
240 | usb_free_urb(urb); | |
241 | error: | |
242 | return ret; | |
243 | } | |
244 | ||
10ee2402 | 245 | static void gspca_input_create_urb(struct gspca_dev *gspca_dev) |
0274d42e | 246 | { |
0274d42e MN |
247 | struct usb_interface *intf; |
248 | struct usb_host_interface *intf_desc; | |
249 | struct usb_endpoint_descriptor *ep; | |
250 | int i; | |
251 | ||
252 | if (gspca_dev->sd_desc->int_pkt_scan) { | |
253 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
254 | intf_desc = intf->cur_altsetting; | |
255 | for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { | |
256 | ep = &intf_desc->endpoint[i].desc; | |
257 | if (usb_endpoint_dir_in(ep) && | |
258 | usb_endpoint_xfer_int(ep)) { | |
259 | ||
10ee2402 | 260 | alloc_and_submit_int_urb(gspca_dev, ep); |
0274d42e MN |
261 | break; |
262 | } | |
263 | } | |
264 | } | |
0274d42e MN |
265 | } |
266 | ||
267 | static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) | |
268 | { | |
269 | struct urb *urb; | |
270 | ||
271 | urb = gspca_dev->int_urb; | |
272 | if (urb) { | |
273 | gspca_dev->int_urb = NULL; | |
274 | usb_kill_urb(urb); | |
997ea58e DM |
275 | usb_free_coherent(gspca_dev->dev, |
276 | urb->transfer_buffer_length, | |
277 | urb->transfer_buffer, | |
278 | urb->transfer_dma); | |
0274d42e MN |
279 | usb_free_urb(urb); |
280 | } | |
281 | } | |
f7628015 RD |
282 | #else |
283 | static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) | |
284 | { | |
285 | } | |
286 | ||
287 | static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev) | |
288 | { | |
289 | } | |
290 | ||
291 | static inline int gspca_input_connect(struct gspca_dev *dev) | |
292 | { | |
293 | return 0; | |
294 | } | |
0274d42e MN |
295 | #endif |
296 | ||
63eb9546 | 297 | /* |
d43fa32f | 298 | * fill a video frame from an URB and resubmit |
63eb9546 | 299 | */ |
d43fa32f JFM |
300 | static void fill_frame(struct gspca_dev *gspca_dev, |
301 | struct urb *urb) | |
63eb9546 | 302 | { |
8d584a53 | 303 | u8 *data; /* address of data in the iso message */ |
1b60e1ad | 304 | int i, len, st; |
63eb9546 JFM |
305 | cam_pkt_op pkt_scan; |
306 | ||
6a7eba24 | 307 | if (urb->status != 0) { |
090264e5 JFM |
308 | if (urb->status == -ESHUTDOWN) |
309 | return; /* disconnection */ | |
62ee8eee | 310 | #ifdef CONFIG_PM |
6a540bdf HG |
311 | if (gspca_dev->frozen) |
312 | return; | |
62ee8eee | 313 | #endif |
6a540bdf | 314 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); |
8157852f | 315 | urb->status = 0; |
bf926adf | 316 | goto resubmit; |
6a7eba24 | 317 | } |
63eb9546 JFM |
318 | pkt_scan = gspca_dev->sd_desc->pkt_scan; |
319 | for (i = 0; i < urb->number_of_packets; i++) { | |
320 | ||
63eb9546 JFM |
321 | /* check the packet status and length */ |
322 | len = urb->iso_frame_desc[i].actual_length; | |
ff374747 JFM |
323 | if (len == 0) { |
324 | if (gspca_dev->empty_packet == 0) | |
325 | gspca_dev->empty_packet = 1; | |
6a7eba24 | 326 | continue; |
ff374747 | 327 | } |
63eb9546 JFM |
328 | st = urb->iso_frame_desc[i].status; |
329 | if (st) { | |
6a7eba24 JFM |
330 | PDEBUG(D_ERR, |
331 | "ISOC data error: [%d] len=%d, status=%d", | |
63eb9546 JFM |
332 | i, len, st); |
333 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
334 | continue; | |
335 | } | |
63eb9546 JFM |
336 | |
337 | /* let the packet be analyzed by the subdriver */ | |
338 | PDEBUG(D_PACK, "packet [%d] o:%d l:%d", | |
339 | i, urb->iso_frame_desc[i].offset, len); | |
8d584a53 | 340 | data = (u8 *) urb->transfer_buffer |
63eb9546 | 341 | + urb->iso_frame_desc[i].offset; |
76dd272b | 342 | pkt_scan(gspca_dev, data, len); |
63eb9546 JFM |
343 | } |
344 | ||
bf926adf | 345 | resubmit: |
63eb9546 | 346 | /* resubmit the URB */ |
63eb9546 JFM |
347 | st = usb_submit_urb(urb, GFP_ATOMIC); |
348 | if (st < 0) | |
349 | PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st); | |
350 | } | |
351 | ||
d43fa32f JFM |
352 | /* |
353 | * ISOC message interrupt from the USB device | |
354 | * | |
ac0d6df6 | 355 | * Analyse each packet and call the subdriver for copy to the frame buffer. |
d43fa32f | 356 | */ |
8d584a53 | 357 | static void isoc_irq(struct urb *urb) |
d43fa32f JFM |
358 | { |
359 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
360 | ||
3647fea8 | 361 | PDEBUG(D_PACK, "isoc irq"); |
d43fa32f JFM |
362 | if (!gspca_dev->streaming) |
363 | return; | |
364 | fill_frame(gspca_dev, urb); | |
365 | } | |
366 | ||
0be01004 JFM |
367 | /* |
368 | * bulk message interrupt from the USB device | |
369 | */ | |
8d584a53 | 370 | static void bulk_irq(struct urb *urb) |
0be01004 JFM |
371 | { |
372 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
dff369aa | 373 | int st; |
0be01004 JFM |
374 | |
375 | PDEBUG(D_PACK, "bulk irq"); | |
376 | if (!gspca_dev->streaming) | |
377 | return; | |
880ae24d JFM |
378 | switch (urb->status) { |
379 | case 0: | |
380 | break; | |
090264e5 JFM |
381 | case -ESHUTDOWN: |
382 | return; /* disconnection */ | |
880ae24d | 383 | default: |
0be01004 | 384 | #ifdef CONFIG_PM |
6a540bdf HG |
385 | if (gspca_dev->frozen) |
386 | return; | |
0be01004 | 387 | #endif |
6a540bdf | 388 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); |
8157852f | 389 | urb->status = 0; |
bf926adf | 390 | goto resubmit; |
0be01004 JFM |
391 | } |
392 | ||
d131c3c9 JFM |
393 | PDEBUG(D_PACK, "packet l:%d", urb->actual_length); |
394 | gspca_dev->sd_desc->pkt_scan(gspca_dev, | |
d131c3c9 JFM |
395 | urb->transfer_buffer, |
396 | urb->actual_length); | |
dff369aa | 397 | |
bf926adf | 398 | resubmit: |
dff369aa AO |
399 | /* resubmit the URB */ |
400 | if (gspca_dev->cam.bulk_nurbs != 0) { | |
401 | st = usb_submit_urb(urb, GFP_ATOMIC); | |
402 | if (st < 0) | |
403 | PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st); | |
404 | } | |
0be01004 JFM |
405 | } |
406 | ||
63eb9546 JFM |
407 | /* |
408 | * add data to the current frame | |
409 | * | |
ac0d6df6 JFM |
410 | * This function is called by the subdrivers at interrupt level. |
411 | * | |
63eb9546 JFM |
412 | * To build a frame, these ones must add |
413 | * - one FIRST_PACKET | |
414 | * - 0 or many INTER_PACKETs | |
415 | * - one LAST_PACKET | |
416 | * DISCARD_PACKET invalidates the whole frame. | |
417 | * On LAST_PACKET, a new frame is returned. | |
418 | */ | |
76dd272b JFM |
419 | void gspca_frame_add(struct gspca_dev *gspca_dev, |
420 | enum gspca_packet_type packet_type, | |
421 | const u8 *data, | |
422 | int len) | |
63eb9546 | 423 | { |
3ec342f2 | 424 | struct gspca_frame *frame; |
63eb9546 JFM |
425 | int i, j; |
426 | ||
e2997a72 | 427 | PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len); |
d131c3c9 | 428 | |
63eb9546 | 429 | if (packet_type == FIRST_PACKET) { |
f7059eaa JFM |
430 | i = atomic_read(&gspca_dev->fr_i); |
431 | ||
432 | /* if there are no queued buffer, discard the whole frame */ | |
433 | if (i == atomic_read(&gspca_dev->fr_q)) { | |
434 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
435 | return; | |
436 | } | |
b192ca98 JFM |
437 | j = gspca_dev->fr_queue[i]; |
438 | frame = &gspca_dev->frame[j]; | |
2f51d00f | 439 | frame->v4l2_buf.timestamp = ktime_to_timeval(ktime_get()); |
63eb9546 | 440 | frame->v4l2_buf.sequence = ++gspca_dev->sequence; |
f7059eaa | 441 | gspca_dev->image = frame->data; |
b192ca98 | 442 | gspca_dev->image_len = 0; |
d43fa32f | 443 | } else if (gspca_dev->last_packet_type == DISCARD_PACKET) { |
06ca78fa JFM |
444 | if (packet_type == LAST_PACKET) |
445 | gspca_dev->last_packet_type = packet_type; | |
76dd272b | 446 | return; |
d43fa32f | 447 | } |
63eb9546 | 448 | |
d43fa32f | 449 | /* append the packet to the frame buffer */ |
63eb9546 | 450 | if (len > 0) { |
b192ca98 JFM |
451 | if (gspca_dev->image_len + len > gspca_dev->frsz) { |
452 | PDEBUG(D_ERR|D_PACK, "frame overflow %d > %d", | |
453 | gspca_dev->image_len + len, | |
454 | gspca_dev->frsz); | |
63eb9546 JFM |
455 | packet_type = DISCARD_PACKET; |
456 | } else { | |
b192ca98 JFM |
457 | memcpy(gspca_dev->image + gspca_dev->image_len, |
458 | data, len); | |
459 | gspca_dev->image_len += len; | |
63eb9546 JFM |
460 | } |
461 | } | |
462 | gspca_dev->last_packet_type = packet_type; | |
463 | ||
f7059eaa JFM |
464 | /* if last packet, invalidate packet concatenation until |
465 | * next first packet, wake up the application and advance | |
466 | * in the queue */ | |
63eb9546 | 467 | if (packet_type == LAST_PACKET) { |
f7059eaa | 468 | i = atomic_read(&gspca_dev->fr_i); |
b192ca98 JFM |
469 | j = gspca_dev->fr_queue[i]; |
470 | frame = &gspca_dev->frame[j]; | |
471 | frame->v4l2_buf.bytesused = gspca_dev->image_len; | |
02bbcb9d JFM |
472 | frame->v4l2_buf.flags = (frame->v4l2_buf.flags |
473 | | V4L2_BUF_FLAG_DONE) | |
474 | & ~V4L2_BUF_FLAG_QUEUED; | |
f7059eaa JFM |
475 | i = (i + 1) % GSPCA_MAX_FRAMES; |
476 | atomic_set(&gspca_dev->fr_i, i); | |
63eb9546 | 477 | wake_up_interruptible(&gspca_dev->wq); /* event = new frame */ |
f7059eaa JFM |
478 | PDEBUG(D_FRAM, "frame complete len:%d", |
479 | frame->v4l2_buf.bytesused); | |
480 | gspca_dev->image = NULL; | |
481 | gspca_dev->image_len = 0; | |
63eb9546 | 482 | } |
63eb9546 JFM |
483 | } |
484 | EXPORT_SYMBOL(gspca_frame_add); | |
485 | ||
486 | static int gspca_is_compressed(__u32 format) | |
487 | { | |
488 | switch (format) { | |
489 | case V4L2_PIX_FMT_MJPEG: | |
490 | case V4L2_PIX_FMT_JPEG: | |
50a871fe | 491 | case V4L2_PIX_FMT_SPCA561: |
ab8f12cf | 492 | case V4L2_PIX_FMT_PAC207: |
d661e622 | 493 | case V4L2_PIX_FMT_MR97310A: |
63eb9546 JFM |
494 | return 1; |
495 | } | |
496 | return 0; | |
497 | } | |
498 | ||
63eb9546 | 499 | static int frame_alloc(struct gspca_dev *gspca_dev, |
d43fa32f | 500 | unsigned int count) |
63eb9546 | 501 | { |
d43fa32f JFM |
502 | struct gspca_frame *frame; |
503 | unsigned int frsz; | |
504 | int i; | |
63eb9546 | 505 | |
c2446b3e JFM |
506 | i = gspca_dev->curr_mode; |
507 | frsz = gspca_dev->cam.cam_mode[i].sizeimage; | |
63eb9546 | 508 | PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz); |
63eb9546 | 509 | frsz = PAGE_ALIGN(frsz); |
63eb9546 | 510 | gspca_dev->frsz = frsz; |
f7059eaa JFM |
511 | if (count >= GSPCA_MAX_FRAMES) |
512 | count = GSPCA_MAX_FRAMES - 1; | |
e795d912 | 513 | gspca_dev->frbuf = vmalloc_32(frsz * count); |
ac0d6df6 JFM |
514 | if (!gspca_dev->frbuf) { |
515 | err("frame alloc failed"); | |
516 | return -ENOMEM; | |
63eb9546 JFM |
517 | } |
518 | gspca_dev->nframes = count; | |
519 | for (i = 0; i < count; i++) { | |
d43fa32f JFM |
520 | frame = &gspca_dev->frame[i]; |
521 | frame->v4l2_buf.index = i; | |
522 | frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
523 | frame->v4l2_buf.flags = 0; | |
524 | frame->v4l2_buf.field = V4L2_FIELD_NONE; | |
525 | frame->v4l2_buf.length = frsz; | |
526 | frame->v4l2_buf.memory = gspca_dev->memory; | |
527 | frame->v4l2_buf.sequence = 0; | |
b192ca98 | 528 | frame->data = gspca_dev->frbuf + i * frsz; |
ac0d6df6 | 529 | frame->v4l2_buf.m.offset = i * frsz; |
63eb9546 | 530 | } |
f7059eaa JFM |
531 | atomic_set(&gspca_dev->fr_q, 0); |
532 | atomic_set(&gspca_dev->fr_i, 0); | |
533 | gspca_dev->fr_o = 0; | |
d43fa32f | 534 | return 0; |
63eb9546 JFM |
535 | } |
536 | ||
537 | static void frame_free(struct gspca_dev *gspca_dev) | |
538 | { | |
539 | int i; | |
540 | ||
541 | PDEBUG(D_STREAM, "frame free"); | |
efab8211 | 542 | if (gspca_dev->frbuf != NULL) { |
e795d912 | 543 | vfree(gspca_dev->frbuf); |
63eb9546 JFM |
544 | gspca_dev->frbuf = NULL; |
545 | for (i = 0; i < gspca_dev->nframes; i++) | |
546 | gspca_dev->frame[i].data = NULL; | |
547 | } | |
548 | gspca_dev->nframes = 0; | |
549 | } | |
550 | ||
d43fa32f | 551 | static void destroy_urbs(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
552 | { |
553 | struct urb *urb; | |
554 | unsigned int i; | |
555 | ||
556 | PDEBUG(D_STREAM, "kill transfer"); | |
44732819 | 557 | for (i = 0; i < MAX_NURBS; i++) { |
4aa0d037 | 558 | urb = gspca_dev->urb[i]; |
63eb9546 | 559 | if (urb == NULL) |
d43fa32f | 560 | break; |
63eb9546 | 561 | |
4aa0d037 | 562 | gspca_dev->urb[i] = NULL; |
090264e5 | 563 | usb_kill_urb(urb); |
efab8211 | 564 | if (urb->transfer_buffer != NULL) |
997ea58e DM |
565 | usb_free_coherent(gspca_dev->dev, |
566 | urb->transfer_buffer_length, | |
567 | urb->transfer_buffer, | |
568 | urb->transfer_dma); | |
63eb9546 JFM |
569 | usb_free_urb(urb); |
570 | } | |
63eb9546 JFM |
571 | } |
572 | ||
e4dac289 JFM |
573 | static int gspca_set_alt0(struct gspca_dev *gspca_dev) |
574 | { | |
575 | int ret; | |
576 | ||
577 | if (gspca_dev->alt == 0) | |
578 | return 0; | |
579 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0); | |
580 | if (ret < 0) | |
581 | PDEBUG(D_ERR|D_STREAM, "set alt 0 err %d", ret); | |
582 | return ret; | |
583 | } | |
584 | ||
585 | /* Note: both the queue and the usb locks should be held when calling this */ | |
586 | static void gspca_stream_off(struct gspca_dev *gspca_dev) | |
587 | { | |
588 | gspca_dev->streaming = 0; | |
589 | if (gspca_dev->present) { | |
590 | if (gspca_dev->sd_desc->stopN) | |
591 | gspca_dev->sd_desc->stopN(gspca_dev); | |
592 | destroy_urbs(gspca_dev); | |
593 | gspca_input_destroy_urb(gspca_dev); | |
594 | gspca_set_alt0(gspca_dev); | |
595 | gspca_input_create_urb(gspca_dev); | |
596 | } | |
597 | ||
598 | /* always call stop0 to free the subdriver's resources */ | |
599 | if (gspca_dev->sd_desc->stop0) | |
600 | gspca_dev->sd_desc->stop0(gspca_dev); | |
601 | PDEBUG(D_STREAM, "stream off OK"); | |
602 | } | |
603 | ||
63eb9546 | 604 | /* |
219423c1 | 605 | * look for an input transfer endpoint in an alternate setting |
63eb9546 | 606 | */ |
0be01004 | 607 | static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, |
6929dc6b | 608 | int xfer) |
63eb9546 JFM |
609 | { |
610 | struct usb_host_endpoint *ep; | |
611 | int i, attr; | |
612 | ||
63eb9546 JFM |
613 | for (i = 0; i < alt->desc.bNumEndpoints; i++) { |
614 | ep = &alt->endpoint[i]; | |
50e06dee | 615 | attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; |
30d35e49 JFM |
616 | if (attr == xfer |
617 | && ep->desc.wMaxPacketSize != 0) | |
50e06dee | 618 | return ep; |
63eb9546 JFM |
619 | } |
620 | return NULL; | |
621 | } | |
622 | ||
623 | /* | |
219423c1 | 624 | * look for an input (isoc or bulk) endpoint |
63eb9546 JFM |
625 | * |
626 | * The endpoint is defined by the subdriver. | |
627 | * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep). | |
628 | * This routine may be called many times when the bandwidth is too small | |
629 | * (the bandwidth is checked on urb submit). | |
630 | */ | |
0be01004 | 631 | static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
632 | { |
633 | struct usb_interface *intf; | |
634 | struct usb_host_endpoint *ep; | |
6929dc6b | 635 | int xfer, i, ret; |
63eb9546 JFM |
636 | |
637 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
6a7eba24 | 638 | ep = NULL; |
6929dc6b JFM |
639 | xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK |
640 | : USB_ENDPOINT_XFER_ISOC; | |
63eb9546 | 641 | i = gspca_dev->alt; /* previous alt setting */ |
a511ba94 | 642 | if (gspca_dev->cam.reverse_alts) { |
35680baa JFM |
643 | if (gspca_dev->audio) |
644 | i++; | |
a511ba94 HG |
645 | while (++i < gspca_dev->nbalt) { |
646 | ep = alt_xfer(&intf->altsetting[i], xfer); | |
647 | if (ep) | |
648 | break; | |
649 | } | |
650 | } else { | |
35680baa JFM |
651 | if (gspca_dev->audio) |
652 | i--; | |
a511ba94 HG |
653 | while (--i >= 0) { |
654 | ep = alt_xfer(&intf->altsetting[i], xfer); | |
655 | if (ep) | |
656 | break; | |
657 | } | |
63eb9546 | 658 | } |
6a7eba24 | 659 | if (ep == NULL) { |
6929dc6b JFM |
660 | err("no transfer endpoint found"); |
661 | return NULL; | |
63eb9546 | 662 | } |
0be01004 | 663 | PDEBUG(D_STREAM, "use alt %d ep 0x%02x", |
63eb9546 | 664 | i, ep->desc.bEndpointAddress); |
1c8336d3 | 665 | gspca_dev->alt = i; /* memorize the current alt setting */ |
8dd07ef1 | 666 | if (gspca_dev->nbalt > 1) { |
0274d42e | 667 | gspca_input_destroy_urb(gspca_dev); |
95d9142c JFM |
668 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i); |
669 | if (ret < 0) { | |
6929dc6b | 670 | err("set alt %d err %d", i, ret); |
0274d42e | 671 | ep = NULL; |
95d9142c | 672 | } |
0274d42e | 673 | gspca_input_create_urb(gspca_dev); |
63eb9546 | 674 | } |
63eb9546 JFM |
675 | return ep; |
676 | } | |
677 | ||
678 | /* | |
0be01004 | 679 | * create the URBs for image transfer |
63eb9546 JFM |
680 | */ |
681 | static int create_urbs(struct gspca_dev *gspca_dev, | |
682 | struct usb_host_endpoint *ep) | |
683 | { | |
684 | struct urb *urb; | |
d43fa32f | 685 | int n, nurbs, i, psize, npkt, bsize; |
63eb9546 JFM |
686 | |
687 | /* calculate the packet size and the number of packets */ | |
63eb9546 | 688 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
d43fa32f | 689 | |
6929dc6b | 690 | if (!gspca_dev->cam.bulk) { /* isoc */ |
95d9142c JFM |
691 | |
692 | /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ | |
1f53b0b0 JFM |
693 | if (gspca_dev->pkt_size == 0) |
694 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); | |
695 | else | |
696 | psize = gspca_dev->pkt_size; | |
49cb6b04 JFM |
697 | npkt = gspca_dev->cam.npkt; |
698 | if (npkt == 0) | |
699 | npkt = 32; /* default value */ | |
0be01004 JFM |
700 | bsize = psize * npkt; |
701 | PDEBUG(D_STREAM, | |
702 | "isoc %d pkts size %d = bsize:%d", | |
703 | npkt, psize, bsize); | |
51977a8d | 704 | nurbs = DEF_NURBS; |
95d9142c | 705 | } else { /* bulk */ |
0be01004 | 706 | npkt = 0; |
dff369aa | 707 | bsize = gspca_dev->cam.bulk_size; |
95d9142c JFM |
708 | if (bsize == 0) |
709 | bsize = psize; | |
0be01004 | 710 | PDEBUG(D_STREAM, "bulk bsize:%d", bsize); |
dff369aa AO |
711 | if (gspca_dev->cam.bulk_nurbs != 0) |
712 | nurbs = gspca_dev->cam.bulk_nurbs; | |
713 | else | |
714 | nurbs = 1; | |
0be01004 JFM |
715 | } |
716 | ||
d43fa32f | 717 | for (n = 0; n < nurbs; n++) { |
63eb9546 JFM |
718 | urb = usb_alloc_urb(npkt, GFP_KERNEL); |
719 | if (!urb) { | |
720 | err("usb_alloc_urb failed"); | |
721 | return -ENOMEM; | |
722 | } | |
db870875 | 723 | gspca_dev->urb[n] = urb; |
997ea58e | 724 | urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev, |
63eb9546 JFM |
725 | bsize, |
726 | GFP_KERNEL, | |
727 | &urb->transfer_dma); | |
728 | ||
4aa0d037 | 729 | if (urb->transfer_buffer == NULL) { |
997ea58e | 730 | err("usb_alloc_coherent failed"); |
63eb9546 JFM |
731 | return -ENOMEM; |
732 | } | |
63eb9546 JFM |
733 | urb->dev = gspca_dev->dev; |
734 | urb->context = gspca_dev; | |
63eb9546 | 735 | urb->transfer_buffer_length = bsize; |
0be01004 JFM |
736 | if (npkt != 0) { /* ISOC */ |
737 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, | |
738 | ep->desc.bEndpointAddress); | |
6c49da7f FZ |
739 | urb->transfer_flags = URB_ISO_ASAP |
740 | | URB_NO_TRANSFER_DMA_MAP; | |
0be01004 JFM |
741 | urb->interval = ep->desc.bInterval; |
742 | urb->complete = isoc_irq; | |
743 | urb->number_of_packets = npkt; | |
744 | for (i = 0; i < npkt; i++) { | |
745 | urb->iso_frame_desc[i].length = psize; | |
746 | urb->iso_frame_desc[i].offset = psize * i; | |
747 | } | |
748 | } else { /* bulk */ | |
749 | urb->pipe = usb_rcvbulkpipe(gspca_dev->dev, | |
750 | ep->desc.bEndpointAddress), | |
6c49da7f | 751 | urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; |
0be01004 | 752 | urb->complete = bulk_irq; |
63eb9546 JFM |
753 | } |
754 | } | |
755 | return 0; | |
756 | } | |
757 | ||
758 | /* | |
759 | * start the USB transfer | |
760 | */ | |
761 | static int gspca_init_transfer(struct gspca_dev *gspca_dev) | |
762 | { | |
63eb9546 | 763 | struct usb_host_endpoint *ep; |
db870875 | 764 | struct urb *urb; |
63eb9546 JFM |
765 | int n, ret; |
766 | ||
e2997a72 HG |
767 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
768 | return -ERESTARTSYS; | |
63eb9546 | 769 | |
090264e5 JFM |
770 | if (!gspca_dev->present) { |
771 | ret = -ENODEV; | |
772 | goto out; | |
773 | } | |
774 | ||
f7059eaa JFM |
775 | /* reset the streaming variables */ |
776 | gspca_dev->image = NULL; | |
777 | gspca_dev->image_len = 0; | |
778 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
779 | gspca_dev->sequence = 0; | |
780 | ||
ab6c8cf2 JFM |
781 | gspca_dev->usb_err = 0; |
782 | ||
d43fa32f JFM |
783 | /* set the higher alternate setting and |
784 | * loop until urb submit succeeds */ | |
a511ba94 HG |
785 | if (gspca_dev->cam.reverse_alts) |
786 | gspca_dev->alt = 0; | |
787 | else | |
788 | gspca_dev->alt = gspca_dev->nbalt; | |
789 | ||
1f53b0b0 JFM |
790 | if (gspca_dev->sd_desc->isoc_init) { |
791 | ret = gspca_dev->sd_desc->isoc_init(gspca_dev); | |
792 | if (ret < 0) | |
793 | goto out; | |
794 | } | |
795 | ep = get_ep(gspca_dev); | |
796 | if (ep == NULL) { | |
797 | ret = -EIO; | |
798 | goto out; | |
799 | } | |
63eb9546 | 800 | for (;;) { |
47aaca96 JFM |
801 | if (!gspca_dev->cam.no_urb_create) { |
802 | PDEBUG(D_STREAM, "init transfer alt %d", | |
803 | gspca_dev->alt); | |
804 | ret = create_urbs(gspca_dev, ep); | |
805 | if (ret < 0) { | |
806 | destroy_urbs(gspca_dev); | |
807 | goto out; | |
808 | } | |
db870875 | 809 | } |
63eb9546 | 810 | |
8fe2f1d5 | 811 | /* clear the bulk endpoint */ |
6929dc6b | 812 | if (gspca_dev->cam.bulk) |
8fe2f1d5 | 813 | usb_clear_halt(gspca_dev->dev, |
50e06dee | 814 | gspca_dev->urb[0]->pipe); |
8fe2f1d5 | 815 | |
63eb9546 | 816 | /* start the cam */ |
72ab97ce JFM |
817 | ret = gspca_dev->sd_desc->start(gspca_dev); |
818 | if (ret < 0) { | |
819 | destroy_urbs(gspca_dev); | |
820 | goto out; | |
821 | } | |
63eb9546 | 822 | gspca_dev->streaming = 1; |
63eb9546 | 823 | |
dff369aa | 824 | /* some bulk transfers are started by the subdriver */ |
6929dc6b | 825 | if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0) |
51977a8d JFM |
826 | break; |
827 | ||
63eb9546 | 828 | /* submit the URBs */ |
db870875 JFM |
829 | for (n = 0; n < MAX_NURBS; n++) { |
830 | urb = gspca_dev->urb[n]; | |
831 | if (urb == NULL) | |
832 | break; | |
833 | ret = usb_submit_urb(urb, GFP_KERNEL); | |
1f53b0b0 JFM |
834 | if (ret < 0) |
835 | break; | |
63eb9546 JFM |
836 | } |
837 | if (ret >= 0) | |
838 | break; | |
e4dac289 | 839 | gspca_stream_off(gspca_dev); |
4bdf4a83 JFM |
840 | if (ret != -ENOSPC) { |
841 | PDEBUG(D_ERR|D_STREAM, | |
842 | "usb_submit_urb alt %d err %d", | |
843 | gspca_dev->alt, ret); | |
1f53b0b0 | 844 | goto out; |
4bdf4a83 | 845 | } |
1f53b0b0 JFM |
846 | |
847 | /* the bandwidth is not wide enough | |
848 | * negociate or try a lower alternate setting */ | |
4bdf4a83 JFM |
849 | PDEBUG(D_ERR|D_STREAM, |
850 | "bandwidth not wide enough - trying again"); | |
1f53b0b0 JFM |
851 | msleep(20); /* wait for kill complete */ |
852 | if (gspca_dev->sd_desc->isoc_nego) { | |
853 | ret = gspca_dev->sd_desc->isoc_nego(gspca_dev); | |
854 | if (ret < 0) | |
855 | goto out; | |
856 | } else { | |
857 | ep = get_ep(gspca_dev); | |
858 | if (ep == NULL) { | |
859 | ret = -EIO; | |
860 | goto out; | |
861 | } | |
862 | } | |
63eb9546 JFM |
863 | } |
864 | out: | |
865 | mutex_unlock(&gspca_dev->usb_lock); | |
866 | return ret; | |
867 | } | |
868 | ||
d43fa32f | 869 | static void gspca_set_default_mode(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
870 | { |
871 | int i; | |
872 | ||
873 | i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ | |
874 | gspca_dev->curr_mode = i; | |
875 | gspca_dev->width = gspca_dev->cam.cam_mode[i].width; | |
876 | gspca_dev->height = gspca_dev->cam.cam_mode[i].height; | |
c2446b3e | 877 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
878 | } |
879 | ||
880 | static int wxh_to_mode(struct gspca_dev *gspca_dev, | |
881 | int width, int height) | |
882 | { | |
883 | int i; | |
884 | ||
d43fa32f JFM |
885 | for (i = gspca_dev->cam.nmodes; --i > 0; ) { |
886 | if (width >= gspca_dev->cam.cam_mode[i].width | |
887 | && height >= gspca_dev->cam.cam_mode[i].height) | |
63eb9546 JFM |
888 | break; |
889 | } | |
63eb9546 JFM |
890 | return i; |
891 | } | |
892 | ||
63eb9546 JFM |
893 | /* |
894 | * search a mode with the right pixel format | |
895 | */ | |
896 | static int gspca_get_mode(struct gspca_dev *gspca_dev, | |
897 | int mode, | |
898 | int pixfmt) | |
899 | { | |
900 | int modeU, modeD; | |
901 | ||
902 | modeU = modeD = mode; | |
903 | while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { | |
904 | if (--modeD >= 0) { | |
c2446b3e JFM |
905 | if (gspca_dev->cam.cam_mode[modeD].pixelformat |
906 | == pixfmt) | |
63eb9546 JFM |
907 | return modeD; |
908 | } | |
909 | if (++modeU < gspca_dev->cam.nmodes) { | |
c2446b3e JFM |
910 | if (gspca_dev->cam.cam_mode[modeU].pixelformat |
911 | == pixfmt) | |
63eb9546 JFM |
912 | return modeU; |
913 | } | |
914 | } | |
915 | return -EINVAL; | |
916 | } | |
917 | ||
af1d9afa BJ |
918 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
919 | static int vidioc_g_register(struct file *file, void *priv, | |
920 | struct v4l2_dbg_register *reg) | |
921 | { | |
922 | int ret; | |
923 | struct gspca_dev *gspca_dev = priv; | |
924 | ||
925 | if (!gspca_dev->sd_desc->get_chip_ident) | |
926 | return -EINVAL; | |
927 | ||
928 | if (!gspca_dev->sd_desc->get_register) | |
929 | return -EINVAL; | |
930 | ||
931 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
932 | return -ERESTARTSYS; | |
8c4ebae4 | 933 | gspca_dev->usb_err = 0; |
af1d9afa BJ |
934 | if (gspca_dev->present) |
935 | ret = gspca_dev->sd_desc->get_register(gspca_dev, reg); | |
936 | else | |
937 | ret = -ENODEV; | |
938 | mutex_unlock(&gspca_dev->usb_lock); | |
939 | ||
940 | return ret; | |
941 | } | |
942 | ||
943 | static int vidioc_s_register(struct file *file, void *priv, | |
944 | struct v4l2_dbg_register *reg) | |
945 | { | |
946 | int ret; | |
947 | struct gspca_dev *gspca_dev = priv; | |
948 | ||
949 | if (!gspca_dev->sd_desc->get_chip_ident) | |
950 | return -EINVAL; | |
951 | ||
952 | if (!gspca_dev->sd_desc->set_register) | |
953 | return -EINVAL; | |
954 | ||
955 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
956 | return -ERESTARTSYS; | |
8c4ebae4 | 957 | gspca_dev->usb_err = 0; |
af1d9afa BJ |
958 | if (gspca_dev->present) |
959 | ret = gspca_dev->sd_desc->set_register(gspca_dev, reg); | |
960 | else | |
961 | ret = -ENODEV; | |
962 | mutex_unlock(&gspca_dev->usb_lock); | |
963 | ||
964 | return ret; | |
965 | } | |
966 | #endif | |
967 | ||
968 | static int vidioc_g_chip_ident(struct file *file, void *priv, | |
969 | struct v4l2_dbg_chip_ident *chip) | |
970 | { | |
971 | int ret; | |
972 | struct gspca_dev *gspca_dev = priv; | |
973 | ||
974 | if (!gspca_dev->sd_desc->get_chip_ident) | |
975 | return -EINVAL; | |
976 | ||
977 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
978 | return -ERESTARTSYS; | |
8c4ebae4 | 979 | gspca_dev->usb_err = 0; |
af1d9afa BJ |
980 | if (gspca_dev->present) |
981 | ret = gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip); | |
982 | else | |
983 | ret = -ENODEV; | |
984 | mutex_unlock(&gspca_dev->usb_lock); | |
985 | ||
986 | return ret; | |
987 | } | |
988 | ||
e078770a | 989 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
990 | struct v4l2_fmtdesc *fmtdesc) |
991 | { | |
992 | struct gspca_dev *gspca_dev = priv; | |
6a7eba24 | 993 | int i, j, index; |
63eb9546 JFM |
994 | __u32 fmt_tb[8]; |
995 | ||
63eb9546 JFM |
996 | /* give an index to each format */ |
997 | index = 0; | |
998 | j = 0; | |
999 | for (i = gspca_dev->cam.nmodes; --i >= 0; ) { | |
c2446b3e | 1000 | fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
1001 | j = 0; |
1002 | for (;;) { | |
1003 | if (fmt_tb[j] == fmt_tb[index]) | |
1004 | break; | |
1005 | j++; | |
1006 | } | |
1007 | if (j == index) { | |
1008 | if (fmtdesc->index == index) | |
1009 | break; /* new format */ | |
1010 | index++; | |
80297125 | 1011 | if (index >= ARRAY_SIZE(fmt_tb)) |
63eb9546 JFM |
1012 | return -EINVAL; |
1013 | } | |
1014 | } | |
1015 | if (i < 0) | |
1016 | return -EINVAL; /* no more format */ | |
1017 | ||
63eb9546 JFM |
1018 | fmtdesc->pixelformat = fmt_tb[index]; |
1019 | if (gspca_is_compressed(fmt_tb[index])) | |
1020 | fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; | |
1021 | fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; | |
1022 | fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; | |
1023 | fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; | |
1024 | fmtdesc->description[3] = fmtdesc->pixelformat >> 24; | |
1025 | fmtdesc->description[4] = '\0'; | |
1026 | return 0; | |
1027 | } | |
1028 | ||
e078770a | 1029 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
1030 | struct v4l2_format *fmt) |
1031 | { | |
1032 | struct gspca_dev *gspca_dev = priv; | |
c2446b3e | 1033 | int mode; |
63eb9546 | 1034 | |
c2446b3e JFM |
1035 | mode = gspca_dev->curr_mode; |
1036 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], | |
1037 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
1038 | return 0; |
1039 | } | |
1040 | ||
e078770a | 1041 | static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1042 | struct v4l2_format *fmt) |
1043 | { | |
24c530b4 | 1044 | int w, h, mode, mode2; |
63eb9546 | 1045 | |
4aa0d037 JFM |
1046 | w = fmt->fmt.pix.width; |
1047 | h = fmt->fmt.pix.height; | |
d43fa32f | 1048 | |
335b3f88 | 1049 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
1050 | if (gspca_debug & D_CONF) |
1051 | PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h); | |
1052 | #endif | |
1053 | /* search the closest mode for width and height */ | |
1054 | mode = wxh_to_mode(gspca_dev, w, h); | |
1055 | ||
1056 | /* OK if right palette */ | |
c2446b3e JFM |
1057 | if (gspca_dev->cam.cam_mode[mode].pixelformat |
1058 | != fmt->fmt.pix.pixelformat) { | |
63eb9546 JFM |
1059 | |
1060 | /* else, search the closest mode with the same pixel format */ | |
1061 | mode2 = gspca_get_mode(gspca_dev, mode, | |
1062 | fmt->fmt.pix.pixelformat); | |
c2446b3e | 1063 | if (mode2 >= 0) |
63eb9546 | 1064 | mode = mode2; |
c2446b3e JFM |
1065 | /* else |
1066 | ; * no chance, return this mode */ | |
63eb9546 | 1067 | } |
c2446b3e JFM |
1068 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], |
1069 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
1070 | return mode; /* used when s_fmt */ |
1071 | } | |
1072 | ||
e078770a | 1073 | static int vidioc_try_fmt_vid_cap(struct file *file, |
63eb9546 JFM |
1074 | void *priv, |
1075 | struct v4l2_format *fmt) | |
1076 | { | |
4aa0d037 | 1077 | struct gspca_dev *gspca_dev = priv; |
63eb9546 JFM |
1078 | int ret; |
1079 | ||
e078770a | 1080 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
1081 | if (ret < 0) |
1082 | return ret; | |
1083 | return 0; | |
1084 | } | |
1085 | ||
e078770a | 1086 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
1087 | struct v4l2_format *fmt) |
1088 | { | |
1089 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 1090 | int ret; |
63eb9546 | 1091 | |
e2997a72 HG |
1092 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1093 | return -ERESTARTSYS; | |
d43fa32f | 1094 | |
e078770a | 1095 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
1096 | if (ret < 0) |
1097 | goto out; | |
1098 | ||
d43fa32f JFM |
1099 | if (gspca_dev->nframes != 0 |
1100 | && fmt->fmt.pix.sizeimage > gspca_dev->frsz) { | |
1101 | ret = -EINVAL; | |
1102 | goto out; | |
1103 | } | |
1104 | ||
50a871fe JFM |
1105 | if (ret == gspca_dev->curr_mode) { |
1106 | ret = 0; | |
63eb9546 | 1107 | goto out; /* same mode */ |
50a871fe | 1108 | } |
d43fa32f JFM |
1109 | |
1110 | if (gspca_dev->streaming) { | |
1111 | ret = -EBUSY; | |
1112 | goto out; | |
e2997a72 | 1113 | } |
4aa0d037 JFM |
1114 | gspca_dev->width = fmt->fmt.pix.width; |
1115 | gspca_dev->height = fmt->fmt.pix.height; | |
63eb9546 JFM |
1116 | gspca_dev->pixfmt = fmt->fmt.pix.pixelformat; |
1117 | gspca_dev->curr_mode = ret; | |
d43fa32f | 1118 | |
d43fa32f | 1119 | ret = 0; |
63eb9546 JFM |
1120 | out: |
1121 | mutex_unlock(&gspca_dev->queue_lock); | |
1122 | return ret; | |
1123 | } | |
1124 | ||
11c635a2 HG |
1125 | static int vidioc_enum_framesizes(struct file *file, void *priv, |
1126 | struct v4l2_frmsizeenum *fsize) | |
1127 | { | |
1128 | struct gspca_dev *gspca_dev = priv; | |
1129 | int i; | |
1130 | __u32 index = 0; | |
1131 | ||
1132 | for (i = 0; i < gspca_dev->cam.nmodes; i++) { | |
1133 | if (fsize->pixel_format != | |
1134 | gspca_dev->cam.cam_mode[i].pixelformat) | |
1135 | continue; | |
1136 | ||
1137 | if (fsize->index == index) { | |
1138 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
1139 | fsize->discrete.width = | |
1140 | gspca_dev->cam.cam_mode[i].width; | |
1141 | fsize->discrete.height = | |
1142 | gspca_dev->cam.cam_mode[i].height; | |
1143 | return 0; | |
1144 | } | |
1145 | index++; | |
1146 | } | |
1147 | ||
1148 | return -EINVAL; | |
1149 | } | |
1150 | ||
28ffe77f AO |
1151 | static int vidioc_enum_frameintervals(struct file *filp, void *priv, |
1152 | struct v4l2_frmivalenum *fival) | |
1153 | { | |
1154 | struct gspca_dev *gspca_dev = priv; | |
1155 | int mode = wxh_to_mode(gspca_dev, fival->width, fival->height); | |
1156 | __u32 i; | |
1157 | ||
1158 | if (gspca_dev->cam.mode_framerates == NULL || | |
1159 | gspca_dev->cam.mode_framerates[mode].nrates == 0) | |
1160 | return -EINVAL; | |
1161 | ||
1162 | if (fival->pixel_format != | |
1163 | gspca_dev->cam.cam_mode[mode].pixelformat) | |
1164 | return -EINVAL; | |
1165 | ||
1166 | for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) { | |
1167 | if (fival->index == i) { | |
1168 | fival->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
1169 | fival->discrete.numerator = 1; | |
1170 | fival->discrete.denominator = | |
1171 | gspca_dev->cam.mode_framerates[mode].rates[i]; | |
1172 | return 0; | |
1173 | } | |
1174 | } | |
1175 | ||
1176 | return -EINVAL; | |
1177 | } | |
1178 | ||
d0182306 | 1179 | static void gspca_release(struct video_device *vfd) |
6b060ffe | 1180 | { |
d0182306 | 1181 | struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev); |
6b060ffe | 1182 | |
38c7c036 LP |
1183 | PDEBUG(D_PROBE, "%s released", |
1184 | video_device_node_name(&gspca_dev->vdev)); | |
6b060ffe FZ |
1185 | |
1186 | kfree(gspca_dev->usb_buf); | |
1187 | kfree(gspca_dev); | |
1188 | } | |
1189 | ||
bec43661 | 1190 | static int dev_open(struct file *file) |
63eb9546 JFM |
1191 | { |
1192 | struct gspca_dev *gspca_dev; | |
1193 | int ret; | |
1194 | ||
0d07e240 | 1195 | PDEBUG(D_STREAM, "[%s] open", current->comm); |
a12ca6a6 | 1196 | gspca_dev = (struct gspca_dev *) video_devdata(file); |
e2997a72 HG |
1197 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1198 | return -ERESTARTSYS; | |
63eb9546 JFM |
1199 | if (!gspca_dev->present) { |
1200 | ret = -ENODEV; | |
1201 | goto out; | |
1202 | } | |
1203 | ||
012d6b02 | 1204 | if (gspca_dev->users > 4) { /* (arbitrary value) */ |
63eb9546 JFM |
1205 | ret = -EBUSY; |
1206 | goto out; | |
1207 | } | |
5c4fa002 JFM |
1208 | |
1209 | /* protect the subdriver against rmmod */ | |
1210 | if (!try_module_get(gspca_dev->module)) { | |
1211 | ret = -ENODEV; | |
1212 | goto out; | |
1213 | } | |
1214 | ||
63eb9546 | 1215 | gspca_dev->users++; |
6b060ffe | 1216 | |
63eb9546 | 1217 | file->private_data = gspca_dev; |
335b3f88 | 1218 | #ifdef GSPCA_DEBUG |
63eb9546 | 1219 | /* activate the v4l2 debug */ |
d43fa32f | 1220 | if (gspca_debug & D_V4L2) |
a12ca6a6 | 1221 | gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL |
9de436cf | 1222 | | V4L2_DEBUG_IOCTL_ARG; |
63eb9546 | 1223 | else |
a12ca6a6 | 1224 | gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL |
9de436cf | 1225 | | V4L2_DEBUG_IOCTL_ARG); |
63eb9546 | 1226 | #endif |
012d6b02 | 1227 | ret = 0; |
63eb9546 JFM |
1228 | out: |
1229 | mutex_unlock(&gspca_dev->queue_lock); | |
1230 | if (ret != 0) | |
1231 | PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret); | |
1232 | else | |
d43fa32f | 1233 | PDEBUG(D_STREAM, "open done"); |
63eb9546 JFM |
1234 | return ret; |
1235 | } | |
1236 | ||
bec43661 | 1237 | static int dev_close(struct file *file) |
63eb9546 JFM |
1238 | { |
1239 | struct gspca_dev *gspca_dev = file->private_data; | |
1240 | ||
0d07e240 | 1241 | PDEBUG(D_STREAM, "[%s] close", current->comm); |
e2997a72 HG |
1242 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1243 | return -ERESTARTSYS; | |
1244 | gspca_dev->users--; | |
e2997a72 | 1245 | |
5b77ae77 | 1246 | /* if the file did the capture, free the streaming resources */ |
4aa0d037 | 1247 | if (gspca_dev->capt_file == file) { |
a1e8288b JFM |
1248 | if (gspca_dev->streaming) { |
1249 | mutex_lock(&gspca_dev->usb_lock); | |
8c4ebae4 | 1250 | gspca_dev->usb_err = 0; |
a1e8288b JFM |
1251 | gspca_stream_off(gspca_dev); |
1252 | mutex_unlock(&gspca_dev->usb_lock); | |
1253 | } | |
4aa0d037 | 1254 | frame_free(gspca_dev); |
efab8211 | 1255 | gspca_dev->capt_file = NULL; |
d43fa32f | 1256 | gspca_dev->memory = GSPCA_MEMORY_NO; |
4aa0d037 | 1257 | } |
d43fa32f | 1258 | file->private_data = NULL; |
5c4fa002 | 1259 | module_put(gspca_dev->module); |
63eb9546 | 1260 | mutex_unlock(&gspca_dev->queue_lock); |
6b060ffe | 1261 | |
d43fa32f | 1262 | PDEBUG(D_STREAM, "close done"); |
6b060ffe | 1263 | |
63eb9546 JFM |
1264 | return 0; |
1265 | } | |
1266 | ||
1267 | static int vidioc_querycap(struct file *file, void *priv, | |
1268 | struct v4l2_capability *cap) | |
1269 | { | |
1270 | struct gspca_dev *gspca_dev = priv; | |
090264e5 | 1271 | int ret; |
63eb9546 | 1272 | |
090264e5 JFM |
1273 | /* protect the access to the usb device */ |
1274 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1275 | return -ERESTARTSYS; | |
1276 | if (!gspca_dev->present) { | |
1277 | ret = -ENODEV; | |
1278 | goto out; | |
1279 | } | |
63eb9546 | 1280 | strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver); |
c6edaf16 JFM |
1281 | if (gspca_dev->dev->product != NULL) { |
1282 | strncpy(cap->card, gspca_dev->dev->product, | |
1283 | sizeof cap->card); | |
1284 | } else { | |
1285 | snprintf(cap->card, sizeof cap->card, | |
1286 | "USB Camera (%04x:%04x)", | |
1287 | le16_to_cpu(gspca_dev->dev->descriptor.idVendor), | |
1288 | le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); | |
1289 | } | |
5932028f | 1290 | usb_make_path(gspca_dev->dev, cap->bus_info, sizeof(cap->bus_info)); |
63eb9546 JFM |
1291 | cap->version = DRIVER_VERSION_NUMBER; |
1292 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | |
1293 | | V4L2_CAP_STREAMING | |
1294 | | V4L2_CAP_READWRITE; | |
090264e5 JFM |
1295 | ret = 0; |
1296 | out: | |
1297 | mutex_unlock(&gspca_dev->usb_lock); | |
1298 | return ret; | |
63eb9546 JFM |
1299 | } |
1300 | ||
a0001a28 HG |
1301 | static const struct ctrl *get_ctrl(struct gspca_dev *gspca_dev, |
1302 | int id) | |
1303 | { | |
1304 | const struct ctrl *ctrls; | |
1305 | int i; | |
1306 | ||
1307 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; | |
1308 | i < gspca_dev->sd_desc->nctrls; | |
1309 | i++, ctrls++) { | |
1310 | if (gspca_dev->ctrl_dis & (1 << i)) | |
1311 | continue; | |
1312 | if (id == ctrls->qctrl.id) | |
1313 | return ctrls; | |
1314 | } | |
1315 | return NULL; | |
1316 | } | |
1317 | ||
63eb9546 JFM |
1318 | static int vidioc_queryctrl(struct file *file, void *priv, |
1319 | struct v4l2_queryctrl *q_ctrl) | |
1320 | { | |
1321 | struct gspca_dev *gspca_dev = priv; | |
a0001a28 HG |
1322 | const struct ctrl *ctrls; |
1323 | int i; | |
6a7eba24 JFM |
1324 | u32 id; |
1325 | ||
a0001a28 | 1326 | ctrls = NULL; |
6a7eba24 JFM |
1327 | id = q_ctrl->id; |
1328 | if (id & V4L2_CTRL_FLAG_NEXT_CTRL) { | |
1329 | id &= V4L2_CTRL_ID_MASK; | |
1330 | id++; | |
1331 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
a0001a28 | 1332 | if (gspca_dev->ctrl_dis & (1 << i)) |
f50ba1be | 1333 | continue; |
b8bfb5fb | 1334 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id) |
f50ba1be | 1335 | continue; |
b8bfb5fb | 1336 | if (ctrls && gspca_dev->sd_desc->ctrls[i].qctrl.id |
a0001a28 | 1337 | > ctrls->qctrl.id) |
b8bfb5fb | 1338 | continue; |
a0001a28 | 1339 | ctrls = &gspca_dev->sd_desc->ctrls[i]; |
63eb9546 | 1340 | } |
83955556 JFM |
1341 | if (ctrls == NULL) |
1342 | return -EINVAL; | |
a0001a28 HG |
1343 | } else { |
1344 | ctrls = get_ctrl(gspca_dev, id); | |
83955556 JFM |
1345 | if (ctrls == NULL) |
1346 | return -EINVAL; | |
4af85668 | 1347 | i = ctrls - gspca_dev->sd_desc->ctrls; |
63eb9546 | 1348 | } |
a0001a28 | 1349 | memcpy(q_ctrl, ctrls, sizeof *q_ctrl); |
4af85668 JFM |
1350 | if (gspca_dev->ctrl_inac & (1 << i)) |
1351 | q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE; | |
f50ba1be | 1352 | return 0; |
63eb9546 JFM |
1353 | } |
1354 | ||
1355 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
1356 | struct v4l2_control *ctrl) | |
1357 | { | |
1358 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 1359 | const struct ctrl *ctrls; |
a0001a28 | 1360 | int ret; |
63eb9546 | 1361 | |
a0001a28 HG |
1362 | ctrls = get_ctrl(gspca_dev, ctrl->id); |
1363 | if (ctrls == NULL) | |
1364 | return -EINVAL; | |
1365 | ||
1366 | if (ctrl->value < ctrls->qctrl.minimum | |
1367 | || ctrl->value > ctrls->qctrl.maximum) | |
1368 | return -ERANGE; | |
1369 | PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value); | |
1370 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1371 | return -ERESTARTSYS; | |
8c4ebae4 | 1372 | gspca_dev->usb_err = 0; |
a0001a28 HG |
1373 | if (gspca_dev->present) |
1374 | ret = ctrls->set(gspca_dev, ctrl->value); | |
1375 | else | |
1376 | ret = -ENODEV; | |
1377 | mutex_unlock(&gspca_dev->usb_lock); | |
1378 | return ret; | |
63eb9546 JFM |
1379 | } |
1380 | ||
1381 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
1382 | struct v4l2_control *ctrl) | |
1383 | { | |
1384 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 1385 | const struct ctrl *ctrls; |
a0001a28 | 1386 | int ret; |
63eb9546 | 1387 | |
a0001a28 HG |
1388 | ctrls = get_ctrl(gspca_dev, ctrl->id); |
1389 | if (ctrls == NULL) | |
1390 | return -EINVAL; | |
1391 | ||
1392 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1393 | return -ERESTARTSYS; | |
8c4ebae4 | 1394 | gspca_dev->usb_err = 0; |
a0001a28 HG |
1395 | if (gspca_dev->present) |
1396 | ret = ctrls->get(gspca_dev, &ctrl->value); | |
1397 | else | |
1398 | ret = -ENODEV; | |
1399 | mutex_unlock(&gspca_dev->usb_lock); | |
1400 | return ret; | |
63eb9546 JFM |
1401 | } |
1402 | ||
1403 | static int vidioc_querymenu(struct file *file, void *priv, | |
1404 | struct v4l2_querymenu *qmenu) | |
1405 | { | |
1406 | struct gspca_dev *gspca_dev = priv; | |
1407 | ||
1408 | if (!gspca_dev->sd_desc->querymenu) | |
1409 | return -EINVAL; | |
1410 | return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu); | |
1411 | } | |
1412 | ||
1413 | static int vidioc_enum_input(struct file *file, void *priv, | |
1414 | struct v4l2_input *input) | |
1415 | { | |
1416 | struct gspca_dev *gspca_dev = priv; | |
1417 | ||
1418 | if (input->index != 0) | |
1419 | return -EINVAL; | |
63eb9546 | 1420 | input->type = V4L2_INPUT_TYPE_CAMERA; |
dfa76fa2 | 1421 | input->status = gspca_dev->cam.input_flags; |
63eb9546 JFM |
1422 | strncpy(input->name, gspca_dev->sd_desc->name, |
1423 | sizeof input->name); | |
1424 | return 0; | |
1425 | } | |
1426 | ||
1427 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) | |
1428 | { | |
1429 | *i = 0; | |
1430 | return 0; | |
1431 | } | |
1432 | ||
1433 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) | |
1434 | { | |
1435 | if (i > 0) | |
1436 | return -EINVAL; | |
1437 | return (0); | |
1438 | } | |
1439 | ||
1440 | static int vidioc_reqbufs(struct file *file, void *priv, | |
1441 | struct v4l2_requestbuffers *rb) | |
1442 | { | |
1443 | struct gspca_dev *gspca_dev = priv; | |
832d0a91 | 1444 | int i, ret = 0, streaming; |
63eb9546 | 1445 | |
a2ba6f27 JFM |
1446 | i = rb->memory; /* (avoid compilation warning) */ |
1447 | switch (i) { | |
5b77ae77 | 1448 | case GSPCA_MEMORY_READ: /* (internal call) */ |
d43fa32f | 1449 | case V4L2_MEMORY_MMAP: |
d43fa32f | 1450 | case V4L2_MEMORY_USERPTR: |
6a7eba24 | 1451 | break; |
d43fa32f | 1452 | default: |
63eb9546 | 1453 | return -EINVAL; |
d43fa32f | 1454 | } |
e2997a72 HG |
1455 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1456 | return -ERESTARTSYS; | |
d43fa32f | 1457 | |
5b77ae77 JFM |
1458 | if (gspca_dev->memory != GSPCA_MEMORY_NO |
1459 | && gspca_dev->memory != rb->memory) { | |
4aa0d037 JFM |
1460 | ret = -EBUSY; |
1461 | goto out; | |
1462 | } | |
d43fa32f | 1463 | |
5b77ae77 JFM |
1464 | /* only one file may do the capture */ |
1465 | if (gspca_dev->capt_file != NULL | |
1466 | && gspca_dev->capt_file != file) { | |
1467 | ret = -EBUSY; | |
1468 | goto out; | |
1469 | } | |
1470 | ||
1471 | /* if allocated, the buffers must not be mapped */ | |
1472 | for (i = 0; i < gspca_dev->nframes; i++) { | |
1473 | if (gspca_dev->frame[i].vma_use_count) { | |
ac0d6df6 JFM |
1474 | ret = -EBUSY; |
1475 | goto out; | |
1476 | } | |
5b77ae77 JFM |
1477 | } |
1478 | ||
1479 | /* stop streaming */ | |
832d0a91 JFM |
1480 | streaming = gspca_dev->streaming; |
1481 | if (streaming) { | |
5b77ae77 | 1482 | mutex_lock(&gspca_dev->usb_lock); |
8c4ebae4 | 1483 | gspca_dev->usb_err = 0; |
5b77ae77 JFM |
1484 | gspca_stream_off(gspca_dev); |
1485 | mutex_unlock(&gspca_dev->usb_lock); | |
1486 | } | |
1487 | ||
1488 | /* free the previous allocated buffers, if any */ | |
1489 | if (gspca_dev->nframes != 0) { | |
1490 | frame_free(gspca_dev); | |
1491 | gspca_dev->capt_file = NULL; | |
1492 | } | |
1493 | if (rb->count == 0) /* unrequest */ | |
1494 | goto out; | |
1495 | gspca_dev->memory = rb->memory; | |
1496 | ret = frame_alloc(gspca_dev, rb->count); | |
1497 | if (ret == 0) { | |
1498 | rb->count = gspca_dev->nframes; | |
1499 | gspca_dev->capt_file = file; | |
832d0a91 JFM |
1500 | if (streaming) |
1501 | ret = gspca_init_transfer(gspca_dev); | |
4aa0d037 JFM |
1502 | } |
1503 | out: | |
63eb9546 JFM |
1504 | mutex_unlock(&gspca_dev->queue_lock); |
1505 | PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count); | |
1506 | return ret; | |
1507 | } | |
1508 | ||
1509 | static int vidioc_querybuf(struct file *file, void *priv, | |
1510 | struct v4l2_buffer *v4l2_buf) | |
1511 | { | |
1512 | struct gspca_dev *gspca_dev = priv; | |
1513 | struct gspca_frame *frame; | |
1514 | ||
13752bd9 | 1515 | if (v4l2_buf->index < 0 |
63eb9546 JFM |
1516 | || v4l2_buf->index >= gspca_dev->nframes) |
1517 | return -EINVAL; | |
1518 | ||
1519 | frame = &gspca_dev->frame[v4l2_buf->index]; | |
1520 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1521 | return 0; | |
1522 | } | |
1523 | ||
1524 | static int vidioc_streamon(struct file *file, void *priv, | |
1525 | enum v4l2_buf_type buf_type) | |
1526 | { | |
1527 | struct gspca_dev *gspca_dev = priv; | |
1528 | int ret; | |
1529 | ||
63eb9546 JFM |
1530 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1531 | return -EINVAL; | |
e2997a72 HG |
1532 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1533 | return -ERESTARTSYS; | |
090264e5 | 1534 | |
18bf99aa JFM |
1535 | /* check the capture file */ |
1536 | if (gspca_dev->capt_file != file) { | |
1537 | ret = -EBUSY; | |
1538 | goto out; | |
1539 | } | |
1540 | ||
1edabe71 JFM |
1541 | if (gspca_dev->nframes == 0 |
1542 | || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) { | |
63eb9546 JFM |
1543 | ret = -EINVAL; |
1544 | goto out; | |
1545 | } | |
1546 | if (!gspca_dev->streaming) { | |
1547 | ret = gspca_init_transfer(gspca_dev); | |
1548 | if (ret < 0) | |
1549 | goto out; | |
1550 | } | |
335b3f88 | 1551 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
1552 | if (gspca_debug & D_STREAM) { |
1553 | PDEBUG_MODE("stream on OK", | |
1554 | gspca_dev->pixfmt, | |
1555 | gspca_dev->width, | |
1556 | gspca_dev->height); | |
1557 | } | |
1558 | #endif | |
e2997a72 | 1559 | ret = 0; |
63eb9546 JFM |
1560 | out: |
1561 | mutex_unlock(&gspca_dev->queue_lock); | |
1562 | return ret; | |
1563 | } | |
1564 | ||
1565 | static int vidioc_streamoff(struct file *file, void *priv, | |
1566 | enum v4l2_buf_type buf_type) | |
1567 | { | |
1568 | struct gspca_dev *gspca_dev = priv; | |
f7059eaa | 1569 | int ret; |
63eb9546 | 1570 | |
63eb9546 JFM |
1571 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1572 | return -EINVAL; | |
4aa0d037 JFM |
1573 | if (!gspca_dev->streaming) |
1574 | return 0; | |
1575 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1576 | return -ERESTARTSYS; | |
5b77ae77 | 1577 | |
18bf99aa JFM |
1578 | /* check the capture file */ |
1579 | if (gspca_dev->capt_file != file) { | |
1580 | ret = -EBUSY; | |
1581 | goto out; | |
1582 | } | |
1583 | ||
5b77ae77 | 1584 | /* stop streaming */ |
4aa0d037 JFM |
1585 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { |
1586 | ret = -ERESTARTSYS; | |
1587 | goto out; | |
63eb9546 | 1588 | } |
8c4ebae4 | 1589 | gspca_dev->usb_err = 0; |
4aa0d037 | 1590 | gspca_stream_off(gspca_dev); |
4aa0d037 | 1591 | mutex_unlock(&gspca_dev->usb_lock); |
5b77ae77 | 1592 | |
f7059eaa JFM |
1593 | /* empty the transfer queues */ |
1594 | atomic_set(&gspca_dev->fr_q, 0); | |
1595 | atomic_set(&gspca_dev->fr_i, 0); | |
1596 | gspca_dev->fr_o = 0; | |
5b77ae77 | 1597 | ret = 0; |
4aa0d037 JFM |
1598 | out: |
1599 | mutex_unlock(&gspca_dev->queue_lock); | |
1600 | return ret; | |
63eb9546 JFM |
1601 | } |
1602 | ||
1603 | static int vidioc_g_jpegcomp(struct file *file, void *priv, | |
1604 | struct v4l2_jpegcompression *jpegcomp) | |
1605 | { | |
1606 | struct gspca_dev *gspca_dev = priv; | |
1607 | int ret; | |
1608 | ||
1609 | if (!gspca_dev->sd_desc->get_jcomp) | |
1610 | return -EINVAL; | |
e2997a72 HG |
1611 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1612 | return -ERESTARTSYS; | |
8c4ebae4 | 1613 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1614 | if (gspca_dev->present) |
1615 | ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); | |
1616 | else | |
1617 | ret = -ENODEV; | |
63eb9546 JFM |
1618 | mutex_unlock(&gspca_dev->usb_lock); |
1619 | return ret; | |
1620 | } | |
1621 | ||
1622 | static int vidioc_s_jpegcomp(struct file *file, void *priv, | |
1623 | struct v4l2_jpegcompression *jpegcomp) | |
1624 | { | |
1625 | struct gspca_dev *gspca_dev = priv; | |
1626 | int ret; | |
1627 | ||
63eb9546 JFM |
1628 | if (!gspca_dev->sd_desc->set_jcomp) |
1629 | return -EINVAL; | |
f86d4a91 JP |
1630 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1631 | return -ERESTARTSYS; | |
8c4ebae4 | 1632 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1633 | if (gspca_dev->present) |
1634 | ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); | |
1635 | else | |
1636 | ret = -ENODEV; | |
63eb9546 JFM |
1637 | mutex_unlock(&gspca_dev->usb_lock); |
1638 | return ret; | |
1639 | } | |
1640 | ||
1641 | static int vidioc_g_parm(struct file *filp, void *priv, | |
1642 | struct v4l2_streamparm *parm) | |
1643 | { | |
1644 | struct gspca_dev *gspca_dev = priv; | |
1645 | ||
63eb9546 | 1646 | parm->parm.capture.readbuffers = gspca_dev->nbufread; |
627a5ef7 JP |
1647 | |
1648 | if (gspca_dev->sd_desc->get_streamparm) { | |
1649 | int ret; | |
1650 | ||
1651 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1652 | return -ERESTARTSYS; | |
8c4ebae4 | 1653 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1654 | if (gspca_dev->present) |
1655 | ret = gspca_dev->sd_desc->get_streamparm(gspca_dev, | |
1656 | parm); | |
1657 | else | |
1658 | ret = -ENODEV; | |
627a5ef7 JP |
1659 | mutex_unlock(&gspca_dev->usb_lock); |
1660 | return ret; | |
1661 | } | |
1662 | ||
63eb9546 JFM |
1663 | return 0; |
1664 | } | |
1665 | ||
1666 | static int vidioc_s_parm(struct file *filp, void *priv, | |
1667 | struct v4l2_streamparm *parm) | |
1668 | { | |
1669 | struct gspca_dev *gspca_dev = priv; | |
1670 | int n; | |
1671 | ||
63eb9546 | 1672 | n = parm->parm.capture.readbuffers; |
f7059eaa | 1673 | if (n == 0 || n >= GSPCA_MAX_FRAMES) |
63eb9546 JFM |
1674 | parm->parm.capture.readbuffers = gspca_dev->nbufread; |
1675 | else | |
1676 | gspca_dev->nbufread = n; | |
627a5ef7 JP |
1677 | |
1678 | if (gspca_dev->sd_desc->set_streamparm) { | |
1679 | int ret; | |
1680 | ||
1681 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1682 | return -ERESTARTSYS; | |
8c4ebae4 | 1683 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1684 | if (gspca_dev->present) |
1685 | ret = gspca_dev->sd_desc->set_streamparm(gspca_dev, | |
1686 | parm); | |
1687 | else | |
1688 | ret = -ENODEV; | |
627a5ef7 JP |
1689 | mutex_unlock(&gspca_dev->usb_lock); |
1690 | return ret; | |
1691 | } | |
1692 | ||
63eb9546 JFM |
1693 | return 0; |
1694 | } | |
1695 | ||
63eb9546 JFM |
1696 | static int dev_mmap(struct file *file, struct vm_area_struct *vma) |
1697 | { | |
1698 | struct gspca_dev *gspca_dev = file->private_data; | |
efab8211 | 1699 | struct gspca_frame *frame; |
63eb9546 JFM |
1700 | struct page *page; |
1701 | unsigned long addr, start, size; | |
1702 | int i, ret; | |
63eb9546 JFM |
1703 | |
1704 | start = vma->vm_start; | |
1705 | size = vma->vm_end - vma->vm_start; | |
1706 | PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size); | |
1707 | ||
e2997a72 HG |
1708 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1709 | return -ERESTARTSYS; | |
63eb9546 JFM |
1710 | if (!gspca_dev->present) { |
1711 | ret = -ENODEV; | |
4aa0d037 JFM |
1712 | goto out; |
1713 | } | |
1714 | if (gspca_dev->capt_file != file) { | |
1715 | ret = -EINVAL; | |
1716 | goto out; | |
63eb9546 JFM |
1717 | } |
1718 | ||
efab8211 | 1719 | frame = NULL; |
63eb9546 JFM |
1720 | for (i = 0; i < gspca_dev->nframes; ++i) { |
1721 | if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) { | |
1722 | PDEBUG(D_STREAM, "mmap bad memory type"); | |
1723 | break; | |
1724 | } | |
1725 | if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT) | |
1726 | == vma->vm_pgoff) { | |
1727 | frame = &gspca_dev->frame[i]; | |
1728 | break; | |
1729 | } | |
1730 | } | |
efab8211 | 1731 | if (frame == NULL) { |
63eb9546 JFM |
1732 | PDEBUG(D_STREAM, "mmap no frame buffer found"); |
1733 | ret = -EINVAL; | |
4aa0d037 | 1734 | goto out; |
63eb9546 | 1735 | } |
38bff697 | 1736 | if (size != frame->v4l2_buf.length) { |
63eb9546 JFM |
1737 | PDEBUG(D_STREAM, "mmap bad size"); |
1738 | ret = -EINVAL; | |
4aa0d037 | 1739 | goto out; |
63eb9546 JFM |
1740 | } |
1741 | ||
1742 | /* | |
1743 | * - VM_IO marks the area as being a mmaped region for I/O to a | |
1744 | * device. It also prevents the region from being core dumped. | |
1745 | */ | |
1746 | vma->vm_flags |= VM_IO; | |
1747 | ||
1748 | addr = (unsigned long) frame->data; | |
1749 | while (size > 0) { | |
1750 | page = vmalloc_to_page((void *) addr); | |
1751 | ret = vm_insert_page(vma, start, page); | |
1752 | if (ret < 0) | |
4aa0d037 | 1753 | goto out; |
63eb9546 JFM |
1754 | start += PAGE_SIZE; |
1755 | addr += PAGE_SIZE; | |
1756 | size -= PAGE_SIZE; | |
1757 | } | |
1758 | ||
d50e257e | 1759 | vma->vm_ops = &gspca_vm_ops; |
63eb9546 JFM |
1760 | vma->vm_private_data = frame; |
1761 | gspca_vm_open(vma); | |
e2997a72 | 1762 | ret = 0; |
4aa0d037 | 1763 | out: |
63eb9546 JFM |
1764 | mutex_unlock(&gspca_dev->queue_lock); |
1765 | return ret; | |
1766 | } | |
1767 | ||
63eb9546 JFM |
1768 | /* |
1769 | * wait for a video frame | |
1770 | * | |
1771 | * If a frame is ready, its index is returned. | |
1772 | */ | |
d43fa32f | 1773 | static int frame_wait(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1774 | int nonblock_ing) |
1775 | { | |
f7059eaa | 1776 | int i, ret; |
63eb9546 | 1777 | |
d43fa32f | 1778 | /* check if a frame is ready */ |
63eb9546 | 1779 | i = gspca_dev->fr_o; |
f7059eaa | 1780 | if (i == atomic_read(&gspca_dev->fr_i)) { |
181b704f HG |
1781 | if (nonblock_ing) |
1782 | return -EAGAIN; | |
1783 | ||
1784 | /* wait till a frame is ready */ | |
4aa0d037 | 1785 | ret = wait_event_interruptible_timeout(gspca_dev->wq, |
f7059eaa | 1786 | i != atomic_read(&gspca_dev->fr_i) || |
181b704f HG |
1787 | !gspca_dev->streaming || !gspca_dev->present, |
1788 | msecs_to_jiffies(3000)); | |
1789 | if (ret < 0) | |
1790 | return ret; | |
1791 | if (ret == 0 || !gspca_dev->streaming || !gspca_dev->present) | |
e2997a72 | 1792 | return -EIO; |
63eb9546 | 1793 | } |
181b704f | 1794 | |
f7059eaa | 1795 | gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES; |
e2997a72 | 1796 | |
739570bb JFM |
1797 | if (gspca_dev->sd_desc->dq_callback) { |
1798 | mutex_lock(&gspca_dev->usb_lock); | |
8c4ebae4 | 1799 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1800 | if (gspca_dev->present) |
1801 | gspca_dev->sd_desc->dq_callback(gspca_dev); | |
739570bb JFM |
1802 | mutex_unlock(&gspca_dev->usb_lock); |
1803 | } | |
f7059eaa | 1804 | return gspca_dev->fr_queue[i]; |
63eb9546 JFM |
1805 | } |
1806 | ||
1807 | /* | |
1808 | * dequeue a video buffer | |
1809 | * | |
1810 | * If nonblock_ing is false, block until a buffer is available. | |
1811 | */ | |
1812 | static int vidioc_dqbuf(struct file *file, void *priv, | |
1813 | struct v4l2_buffer *v4l2_buf) | |
1814 | { | |
1815 | struct gspca_dev *gspca_dev = priv; | |
1816 | struct gspca_frame *frame; | |
1817 | int i, ret; | |
1818 | ||
1819 | PDEBUG(D_FRAM, "dqbuf"); | |
ac0d6df6 | 1820 | if (v4l2_buf->memory != gspca_dev->memory) |
63eb9546 | 1821 | return -EINVAL; |
5b77ae77 | 1822 | |
090264e5 JFM |
1823 | if (!gspca_dev->present) |
1824 | return -ENODEV; | |
1825 | ||
5b77ae77 JFM |
1826 | /* if not streaming, be sure the application will not loop forever */ |
1827 | if (!(file->f_flags & O_NONBLOCK) | |
1828 | && !gspca_dev->streaming && gspca_dev->users == 1) | |
63eb9546 JFM |
1829 | return -EINVAL; |
1830 | ||
5b77ae77 JFM |
1831 | /* only the capturing file may dequeue */ |
1832 | if (gspca_dev->capt_file != file) | |
1833 | return -EINVAL; | |
1834 | ||
1835 | /* only one dequeue / read at a time */ | |
63eb9546 JFM |
1836 | if (mutex_lock_interruptible(&gspca_dev->read_lock)) |
1837 | return -ERESTARTSYS; | |
1838 | ||
d43fa32f | 1839 | ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK); |
63eb9546 | 1840 | if (ret < 0) |
4aa0d037 | 1841 | goto out; |
63eb9546 JFM |
1842 | i = ret; /* frame index */ |
1843 | frame = &gspca_dev->frame[i]; | |
ac0d6df6 | 1844 | if (gspca_dev->memory == V4L2_MEMORY_USERPTR) { |
c6eb8eaf | 1845 | if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr, |
ac0d6df6 JFM |
1846 | frame->data, |
1847 | frame->v4l2_buf.bytesused)) { | |
1848 | PDEBUG(D_ERR|D_STREAM, | |
1849 | "dqbuf cp to user failed"); | |
1850 | ret = -EFAULT; | |
1851 | goto out; | |
1852 | } | |
1853 | } | |
63eb9546 JFM |
1854 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; |
1855 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1856 | PDEBUG(D_FRAM, "dqbuf %d", i); | |
1857 | ret = 0; | |
4aa0d037 | 1858 | out: |
63eb9546 JFM |
1859 | mutex_unlock(&gspca_dev->read_lock); |
1860 | return ret; | |
1861 | } | |
1862 | ||
1863 | /* | |
1864 | * queue a video buffer | |
1865 | * | |
1866 | * Attempting to queue a buffer that has already been | |
1867 | * queued will return -EINVAL. | |
1868 | */ | |
1869 | static int vidioc_qbuf(struct file *file, void *priv, | |
1870 | struct v4l2_buffer *v4l2_buf) | |
1871 | { | |
1872 | struct gspca_dev *gspca_dev = priv; | |
1873 | struct gspca_frame *frame; | |
1874 | int i, index, ret; | |
1875 | ||
1876 | PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index); | |
63eb9546 | 1877 | |
5b77ae77 JFM |
1878 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1879 | return -ERESTARTSYS; | |
1880 | ||
63eb9546 JFM |
1881 | index = v4l2_buf->index; |
1882 | if ((unsigned) index >= gspca_dev->nframes) { | |
d43fa32f | 1883 | PDEBUG(D_FRAM, |
63eb9546 | 1884 | "qbuf idx %d >= %d", index, gspca_dev->nframes); |
5b77ae77 JFM |
1885 | ret = -EINVAL; |
1886 | goto out; | |
63eb9546 | 1887 | } |
5b77ae77 | 1888 | if (v4l2_buf->memory != gspca_dev->memory) { |
d43fa32f | 1889 | PDEBUG(D_FRAM, "qbuf bad memory type"); |
5b77ae77 JFM |
1890 | ret = -EINVAL; |
1891 | goto out; | |
63eb9546 | 1892 | } |
e2997a72 | 1893 | |
5b77ae77 | 1894 | frame = &gspca_dev->frame[index]; |
d43fa32f JFM |
1895 | if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) { |
1896 | PDEBUG(D_FRAM, "qbuf bad state"); | |
63eb9546 JFM |
1897 | ret = -EINVAL; |
1898 | goto out; | |
1899 | } | |
1900 | ||
1901 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED; | |
63eb9546 | 1902 | |
d43fa32f | 1903 | if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) { |
63eb9546 JFM |
1904 | frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr; |
1905 | frame->v4l2_buf.length = v4l2_buf->length; | |
1906 | } | |
1907 | ||
1908 | /* put the buffer in the 'queued' queue */ | |
f7059eaa | 1909 | i = atomic_read(&gspca_dev->fr_q); |
63eb9546 | 1910 | gspca_dev->fr_queue[i] = index; |
f7059eaa | 1911 | atomic_set(&gspca_dev->fr_q, (i + 1) % GSPCA_MAX_FRAMES); |
63eb9546 JFM |
1912 | |
1913 | v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED; | |
1914 | v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE; | |
1915 | ret = 0; | |
1916 | out: | |
1917 | mutex_unlock(&gspca_dev->queue_lock); | |
1918 | return ret; | |
1919 | } | |
1920 | ||
d43fa32f JFM |
1921 | /* |
1922 | * allocate the resources for read() | |
1923 | */ | |
1924 | static int read_alloc(struct gspca_dev *gspca_dev, | |
1925 | struct file *file) | |
63eb9546 | 1926 | { |
63eb9546 | 1927 | struct v4l2_buffer v4l2_buf; |
d43fa32f | 1928 | int i, ret; |
63eb9546 | 1929 | |
d43fa32f | 1930 | PDEBUG(D_STREAM, "read alloc"); |
63eb9546 JFM |
1931 | if (gspca_dev->nframes == 0) { |
1932 | struct v4l2_requestbuffers rb; | |
1933 | ||
1934 | memset(&rb, 0, sizeof rb); | |
1935 | rb.count = gspca_dev->nbufread; | |
1936 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1937 | rb.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1938 | ret = vidioc_reqbufs(file, gspca_dev, &rb); |
1939 | if (ret != 0) { | |
d43fa32f | 1940 | PDEBUG(D_STREAM, "read reqbuf err %d", ret); |
63eb9546 JFM |
1941 | return ret; |
1942 | } | |
1943 | memset(&v4l2_buf, 0, sizeof v4l2_buf); | |
1944 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1945 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1946 | for (i = 0; i < gspca_dev->nbufread; i++) { |
1947 | v4l2_buf.index = i; | |
63eb9546 JFM |
1948 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); |
1949 | if (ret != 0) { | |
1950 | PDEBUG(D_STREAM, "read qbuf err: %d", ret); | |
1951 | return ret; | |
1952 | } | |
1953 | } | |
d43fa32f JFM |
1954 | gspca_dev->memory = GSPCA_MEMORY_READ; |
1955 | } | |
4aa0d037 | 1956 | |
d43fa32f JFM |
1957 | /* start streaming */ |
1958 | ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE); | |
1959 | if (ret != 0) | |
1960 | PDEBUG(D_STREAM, "read streamon err %d", ret); | |
1961 | return ret; | |
1962 | } | |
1963 | ||
1964 | static unsigned int dev_poll(struct file *file, poll_table *wait) | |
1965 | { | |
1966 | struct gspca_dev *gspca_dev = file->private_data; | |
f7059eaa | 1967 | int ret; |
d43fa32f JFM |
1968 | |
1969 | PDEBUG(D_FRAM, "poll"); | |
1970 | ||
1971 | poll_wait(file, &gspca_dev->wq, wait); | |
d43fa32f | 1972 | |
5b77ae77 JFM |
1973 | /* if reqbufs is not done, the user would use read() */ |
1974 | if (gspca_dev->nframes == 0) { | |
1975 | if (gspca_dev->memory != GSPCA_MEMORY_NO) | |
1976 | return POLLERR; /* not the 1st time */ | |
d43fa32f | 1977 | ret = read_alloc(gspca_dev, file); |
5b77ae77 JFM |
1978 | if (ret != 0) |
1979 | return POLLERR; | |
63eb9546 JFM |
1980 | } |
1981 | ||
d43fa32f JFM |
1982 | if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) |
1983 | return POLLERR; | |
d43fa32f | 1984 | |
f7059eaa JFM |
1985 | /* check if an image has been received */ |
1986 | if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i)) | |
1987 | ret = POLLIN | POLLRDNORM; /* yes */ | |
d43fa32f JFM |
1988 | else |
1989 | ret = 0; | |
d43fa32f | 1990 | mutex_unlock(&gspca_dev->queue_lock); |
090264e5 JFM |
1991 | if (!gspca_dev->present) |
1992 | return POLLHUP; | |
d43fa32f JFM |
1993 | return ret; |
1994 | } | |
1995 | ||
1996 | static ssize_t dev_read(struct file *file, char __user *data, | |
1997 | size_t count, loff_t *ppos) | |
1998 | { | |
1999 | struct gspca_dev *gspca_dev = file->private_data; | |
2000 | struct gspca_frame *frame; | |
2001 | struct v4l2_buffer v4l2_buf; | |
2002 | struct timeval timestamp; | |
82643d0e | 2003 | int n, ret, ret2; |
d43fa32f | 2004 | |
a9e11134 | 2005 | PDEBUG(D_FRAM, "read (%zd)", count); |
d43fa32f JFM |
2006 | if (!gspca_dev->present) |
2007 | return -ENODEV; | |
2008 | switch (gspca_dev->memory) { | |
2009 | case GSPCA_MEMORY_NO: /* first time */ | |
2010 | ret = read_alloc(gspca_dev, file); | |
2011 | if (ret != 0) | |
2012 | return ret; | |
2013 | break; | |
2014 | case GSPCA_MEMORY_READ: | |
82643d0e JFM |
2015 | if (gspca_dev->capt_file == file) |
2016 | break; | |
2017 | /* fall thru */ | |
d43fa32f JFM |
2018 | default: |
2019 | return -EINVAL; | |
2020 | } | |
2021 | ||
63eb9546 | 2022 | /* get a frame */ |
2f51d00f | 2023 | timestamp = ktime_to_timeval(ktime_get()); |
63eb9546 | 2024 | timestamp.tv_sec--; |
82643d0e JFM |
2025 | n = 2; |
2026 | for (;;) { | |
63eb9546 JFM |
2027 | memset(&v4l2_buf, 0, sizeof v4l2_buf); |
2028 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 2029 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
2030 | ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf); |
2031 | if (ret != 0) { | |
2032 | PDEBUG(D_STREAM, "read dqbuf err %d", ret); | |
2033 | return ret; | |
2034 | } | |
2035 | ||
2036 | /* if the process slept for more than 1 second, | |
219423c1 | 2037 | * get a newer frame */ |
63eb9546 | 2038 | frame = &gspca_dev->frame[v4l2_buf.index]; |
82643d0e JFM |
2039 | if (--n < 0) |
2040 | break; /* avoid infinite loop */ | |
63eb9546 JFM |
2041 | if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec) |
2042 | break; | |
2043 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
2044 | if (ret != 0) { | |
2045 | PDEBUG(D_STREAM, "read qbuf err %d", ret); | |
2046 | return ret; | |
2047 | } | |
2048 | } | |
2049 | ||
2050 | /* copy the frame */ | |
ac0d6df6 JFM |
2051 | if (count > frame->v4l2_buf.bytesused) |
2052 | count = frame->v4l2_buf.bytesused; | |
63eb9546 JFM |
2053 | ret = copy_to_user(data, frame->data, count); |
2054 | if (ret != 0) { | |
2055 | PDEBUG(D_ERR|D_STREAM, | |
a9e11134 | 2056 | "read cp to user lack %d / %zd", ret, count); |
63eb9546 JFM |
2057 | ret = -EFAULT; |
2058 | goto out; | |
2059 | } | |
2060 | ret = count; | |
2061 | out: | |
2062 | /* in each case, requeue the buffer */ | |
2063 | ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
2064 | if (ret2 != 0) | |
2065 | return ret2; | |
2066 | return ret; | |
2067 | } | |
2068 | ||
bec43661 | 2069 | static struct v4l2_file_operations dev_fops = { |
63eb9546 JFM |
2070 | .owner = THIS_MODULE, |
2071 | .open = dev_open, | |
2072 | .release = dev_close, | |
2073 | .read = dev_read, | |
2074 | .mmap = dev_mmap, | |
bec43661 | 2075 | .unlocked_ioctl = video_ioctl2, |
63eb9546 JFM |
2076 | .poll = dev_poll, |
2077 | }; | |
2078 | ||
a399810c | 2079 | static const struct v4l2_ioctl_ops dev_ioctl_ops = { |
63eb9546 JFM |
2080 | .vidioc_querycap = vidioc_querycap, |
2081 | .vidioc_dqbuf = vidioc_dqbuf, | |
2082 | .vidioc_qbuf = vidioc_qbuf, | |
e078770a MCC |
2083 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
2084 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
2085 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
2086 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
63eb9546 JFM |
2087 | .vidioc_streamon = vidioc_streamon, |
2088 | .vidioc_queryctrl = vidioc_queryctrl, | |
2089 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
2090 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
2091 | .vidioc_querymenu = vidioc_querymenu, | |
2092 | .vidioc_enum_input = vidioc_enum_input, | |
2093 | .vidioc_g_input = vidioc_g_input, | |
2094 | .vidioc_s_input = vidioc_s_input, | |
2095 | .vidioc_reqbufs = vidioc_reqbufs, | |
2096 | .vidioc_querybuf = vidioc_querybuf, | |
2097 | .vidioc_streamoff = vidioc_streamoff, | |
2098 | .vidioc_g_jpegcomp = vidioc_g_jpegcomp, | |
2099 | .vidioc_s_jpegcomp = vidioc_s_jpegcomp, | |
2100 | .vidioc_g_parm = vidioc_g_parm, | |
2101 | .vidioc_s_parm = vidioc_s_parm, | |
11c635a2 | 2102 | .vidioc_enum_framesizes = vidioc_enum_framesizes, |
28ffe77f | 2103 | .vidioc_enum_frameintervals = vidioc_enum_frameintervals, |
af1d9afa BJ |
2104 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
2105 | .vidioc_g_register = vidioc_g_register, | |
2106 | .vidioc_s_register = vidioc_s_register, | |
2107 | #endif | |
2108 | .vidioc_g_chip_ident = vidioc_g_chip_ident, | |
63eb9546 JFM |
2109 | }; |
2110 | ||
a399810c HV |
2111 | static struct video_device gspca_template = { |
2112 | .name = "gspca main driver", | |
a399810c HV |
2113 | .fops = &dev_fops, |
2114 | .ioctl_ops = &dev_ioctl_ops, | |
d0182306 | 2115 | .release = gspca_release, |
a399810c HV |
2116 | }; |
2117 | ||
63eb9546 JFM |
2118 | /* |
2119 | * probe and create a new gspca device | |
2120 | * | |
2121 | * This function must be called by the sub-driver when it is | |
2122 | * called for probing a new device. | |
2123 | */ | |
4462864d | 2124 | int gspca_dev_probe2(struct usb_interface *intf, |
63eb9546 JFM |
2125 | const struct usb_device_id *id, |
2126 | const struct sd_desc *sd_desc, | |
d43fa32f JFM |
2127 | int dev_size, |
2128 | struct module *module) | |
63eb9546 | 2129 | { |
63eb9546 JFM |
2130 | struct gspca_dev *gspca_dev; |
2131 | struct usb_device *dev = interface_to_usbdev(intf); | |
2132 | int ret; | |
63eb9546 | 2133 | |
6a7eba24 | 2134 | PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct); |
63eb9546 | 2135 | |
63eb9546 JFM |
2136 | /* create the device */ |
2137 | if (dev_size < sizeof *gspca_dev) | |
2138 | dev_size = sizeof *gspca_dev; | |
2139 | gspca_dev = kzalloc(dev_size, GFP_KERNEL); | |
e293e599 | 2140 | if (!gspca_dev) { |
63eb9546 | 2141 | err("couldn't kzalloc gspca struct"); |
e293e599 | 2142 | return -ENOMEM; |
63eb9546 | 2143 | } |
8295d99e JFM |
2144 | gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL); |
2145 | if (!gspca_dev->usb_buf) { | |
2146 | err("out of memory"); | |
e293e599 | 2147 | ret = -ENOMEM; |
8295d99e JFM |
2148 | goto out; |
2149 | } | |
63eb9546 | 2150 | gspca_dev->dev = dev; |
4462864d | 2151 | gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber; |
d43fa32f | 2152 | gspca_dev->nbalt = intf->num_altsetting; |
35680baa JFM |
2153 | |
2154 | /* check if any audio device */ | |
2155 | if (dev->config->desc.bNumInterfaces != 1) { | |
2156 | int i; | |
2157 | struct usb_interface *intf2; | |
2158 | ||
2159 | for (i = 0; i < dev->config->desc.bNumInterfaces; i++) { | |
2160 | intf2 = dev->config->interface[i]; | |
2161 | if (intf2 != NULL | |
2162 | && intf2->altsetting != NULL | |
2163 | && intf2->altsetting->desc.bInterfaceClass == | |
2164 | USB_CLASS_AUDIO) { | |
2165 | gspca_dev->audio = 1; | |
2166 | break; | |
2167 | } | |
2168 | } | |
2169 | } | |
2170 | ||
63eb9546 | 2171 | gspca_dev->sd_desc = sd_desc; |
63eb9546 | 2172 | gspca_dev->nbufread = 2; |
ff374747 | 2173 | gspca_dev->empty_packet = -1; /* don't check the empty packets */ |
63eb9546 | 2174 | |
012d6b02 | 2175 | /* configure the subdriver and initialize the USB device */ |
ba38ee8e | 2176 | ret = sd_desc->config(gspca_dev, id); |
012d6b02 JFM |
2177 | if (ret < 0) |
2178 | goto out; | |
ba38ee8e | 2179 | ret = sd_desc->init(gspca_dev); |
63eb9546 JFM |
2180 | if (ret < 0) |
2181 | goto out; | |
2182 | gspca_set_default_mode(gspca_dev); | |
2183 | ||
10ee2402 HG |
2184 | ret = gspca_input_connect(gspca_dev); |
2185 | if (ret) | |
2186 | goto out; | |
2187 | ||
63eb9546 JFM |
2188 | mutex_init(&gspca_dev->usb_lock); |
2189 | mutex_init(&gspca_dev->read_lock); | |
2190 | mutex_init(&gspca_dev->queue_lock); | |
2191 | init_waitqueue_head(&gspca_dev->wq); | |
2192 | ||
2193 | /* init video stuff */ | |
ba38ee8e | 2194 | memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template); |
24441631 | 2195 | gspca_dev->vdev.parent = &intf->dev; |
5c4fa002 | 2196 | gspca_dev->module = module; |
ee56a4d3 | 2197 | gspca_dev->present = 1; |
a12ca6a6 | 2198 | ret = video_register_device(&gspca_dev->vdev, |
63eb9546 | 2199 | VFL_TYPE_GRABBER, |
8d584a53 | 2200 | -1); |
63eb9546 JFM |
2201 | if (ret < 0) { |
2202 | err("video_register_device err %d", ret); | |
2203 | goto out; | |
2204 | } | |
2205 | ||
63eb9546 | 2206 | usb_set_intfdata(intf, gspca_dev); |
38c7c036 | 2207 | PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev)); |
0274d42e | 2208 | |
10ee2402 | 2209 | gspca_input_create_urb(gspca_dev); |
0274d42e | 2210 | |
63eb9546 JFM |
2211 | return 0; |
2212 | out: | |
f7628015 | 2213 | #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) |
10ee2402 HG |
2214 | if (gspca_dev->input_dev) |
2215 | input_unregister_device(gspca_dev->input_dev); | |
e7637521 | 2216 | #endif |
e07a1d8a JFM |
2217 | kfree(gspca_dev->usb_buf); |
2218 | kfree(gspca_dev); | |
63eb9546 JFM |
2219 | return ret; |
2220 | } | |
4462864d JFM |
2221 | EXPORT_SYMBOL(gspca_dev_probe2); |
2222 | ||
2223 | /* same function as the previous one, but check the interface */ | |
2224 | int gspca_dev_probe(struct usb_interface *intf, | |
2225 | const struct usb_device_id *id, | |
2226 | const struct sd_desc *sd_desc, | |
2227 | int dev_size, | |
2228 | struct module *module) | |
2229 | { | |
2230 | struct usb_device *dev = interface_to_usbdev(intf); | |
2231 | ||
2232 | /* we don't handle multi-config cameras */ | |
2233 | if (dev->descriptor.bNumConfigurations != 1) { | |
2234 | PDEBUG(D_ERR, "%04x:%04x too many config", | |
2235 | id->idVendor, id->idProduct); | |
2236 | return -ENODEV; | |
2237 | } | |
2238 | ||
2239 | /* the USB video interface must be the first one */ | |
2240 | if (dev->config->desc.bNumInterfaces != 1 | |
c4dc692c | 2241 | && intf->cur_altsetting->desc.bInterfaceNumber != 0) |
4462864d | 2242 | return -ENODEV; |
4462864d JFM |
2243 | |
2244 | return gspca_dev_probe2(intf, id, sd_desc, dev_size, module); | |
2245 | } | |
63eb9546 JFM |
2246 | EXPORT_SYMBOL(gspca_dev_probe); |
2247 | ||
2248 | /* | |
2249 | * USB disconnection | |
2250 | * | |
2251 | * This function must be called by the sub-driver | |
2252 | * when the device disconnects, after the specific resources are freed. | |
2253 | */ | |
2254 | void gspca_disconnect(struct usb_interface *intf) | |
2255 | { | |
4aa0d037 | 2256 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
f7628015 | 2257 | #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) |
0274d42e | 2258 | struct input_dev *input_dev; |
e070bf9e | 2259 | #endif |
63eb9546 | 2260 | |
38c7c036 LP |
2261 | PDEBUG(D_PROBE, "%s disconnect", |
2262 | video_device_node_name(&gspca_dev->vdev)); | |
ad28127d | 2263 | mutex_lock(&gspca_dev->usb_lock); |
6e4ae872 | 2264 | gspca_dev->present = 0; |
6e4ae872 | 2265 | |
090264e5 JFM |
2266 | if (gspca_dev->streaming) { |
2267 | destroy_urbs(gspca_dev); | |
2268 | wake_up_interruptible(&gspca_dev->wq); | |
2269 | } | |
2270 | ||
f7628015 | 2271 | #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) |
0274d42e MN |
2272 | gspca_input_destroy_urb(gspca_dev); |
2273 | input_dev = gspca_dev->input_dev; | |
2274 | if (input_dev) { | |
2275 | gspca_dev->input_dev = NULL; | |
2276 | input_unregister_device(input_dev); | |
2277 | } | |
e070bf9e | 2278 | #endif |
0274d42e | 2279 | |
090264e5 | 2280 | /* the device is freed at exit of this function */ |
ad28127d | 2281 | gspca_dev->dev = NULL; |
090264e5 JFM |
2282 | mutex_unlock(&gspca_dev->usb_lock); |
2283 | ||
6b060ffe FZ |
2284 | usb_set_intfdata(intf, NULL); |
2285 | ||
a12ca6a6 JFM |
2286 | /* release the device */ |
2287 | /* (this will call gspca_release() immediatly or on last close) */ | |
2288 | video_unregister_device(&gspca_dev->vdev); | |
3145b8c1 | 2289 | |
0d07e240 | 2290 | /* PDEBUG(D_PROBE, "disconnect complete"); */ |
63eb9546 JFM |
2291 | } |
2292 | EXPORT_SYMBOL(gspca_disconnect); | |
2293 | ||
6a709749 JFM |
2294 | #ifdef CONFIG_PM |
2295 | int gspca_suspend(struct usb_interface *intf, pm_message_t message) | |
2296 | { | |
2297 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
2298 | ||
2299 | if (!gspca_dev->streaming) | |
2300 | return 0; | |
2301 | gspca_dev->frozen = 1; /* avoid urb error messages */ | |
012d6b02 JFM |
2302 | if (gspca_dev->sd_desc->stopN) |
2303 | gspca_dev->sd_desc->stopN(gspca_dev); | |
6a709749 | 2304 | destroy_urbs(gspca_dev); |
0274d42e | 2305 | gspca_input_destroy_urb(gspca_dev); |
6a709749 | 2306 | gspca_set_alt0(gspca_dev); |
012d6b02 JFM |
2307 | if (gspca_dev->sd_desc->stop0) |
2308 | gspca_dev->sd_desc->stop0(gspca_dev); | |
6a709749 JFM |
2309 | return 0; |
2310 | } | |
2311 | EXPORT_SYMBOL(gspca_suspend); | |
2312 | ||
2313 | int gspca_resume(struct usb_interface *intf) | |
2314 | { | |
2315 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
2316 | ||
2317 | gspca_dev->frozen = 0; | |
012d6b02 | 2318 | gspca_dev->sd_desc->init(gspca_dev); |
0274d42e | 2319 | gspca_input_create_urb(gspca_dev); |
012d6b02 JFM |
2320 | if (gspca_dev->streaming) |
2321 | return gspca_init_transfer(gspca_dev); | |
1e89e2da | 2322 | return 0; |
6a709749 JFM |
2323 | } |
2324 | EXPORT_SYMBOL(gspca_resume); | |
2325 | #endif | |
dcef3237 HG |
2326 | /* -- cam driver utility functions -- */ |
2327 | ||
2328 | /* auto gain and exposure algorithm based on the knee algorithm described here: | |
2329 | http://ytse.tricolour.net/docs/LowLightOptimization.html | |
2330 | ||
2331 | Returns 0 if no changes were made, 1 if the gain and or exposure settings | |
2332 | where changed. */ | |
2333 | int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum, | |
2334 | int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee) | |
2335 | { | |
2336 | int i, steps, gain, orig_gain, exposure, orig_exposure, autogain; | |
2337 | const struct ctrl *gain_ctrl = NULL; | |
2338 | const struct ctrl *exposure_ctrl = NULL; | |
2339 | const struct ctrl *autogain_ctrl = NULL; | |
2340 | int retval = 0; | |
2341 | ||
2342 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
26984b09 HG |
2343 | if (gspca_dev->ctrl_dis & (1 << i)) |
2344 | continue; | |
dcef3237 HG |
2345 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN) |
2346 | gain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2347 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE) | |
2348 | exposure_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2349 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN) | |
2350 | autogain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2351 | } | |
2352 | if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) { | |
2353 | PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called " | |
2354 | "on cam without (auto)gain/exposure"); | |
2355 | return 0; | |
2356 | } | |
2357 | ||
2358 | if (gain_ctrl->get(gspca_dev, &gain) || | |
2359 | exposure_ctrl->get(gspca_dev, &exposure) || | |
2360 | autogain_ctrl->get(gspca_dev, &autogain) || !autogain) | |
2361 | return 0; | |
2362 | ||
2363 | orig_gain = gain; | |
2364 | orig_exposure = exposure; | |
2365 | ||
2366 | /* If we are of a multiple of deadzone, do multiple steps to reach the | |
2367 | desired lumination fast (with the risc of a slight overshoot) */ | |
2368 | steps = abs(desired_avg_lum - avg_lum) / deadzone; | |
2369 | ||
1c44d81d | 2370 | PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d", |
dcef3237 HG |
2371 | avg_lum, desired_avg_lum, steps); |
2372 | ||
2373 | for (i = 0; i < steps; i++) { | |
2374 | if (avg_lum > desired_avg_lum) { | |
2375 | if (gain > gain_knee) | |
2376 | gain--; | |
2377 | else if (exposure > exposure_knee) | |
2378 | exposure--; | |
2379 | else if (gain > gain_ctrl->qctrl.default_value) | |
2380 | gain--; | |
2381 | else if (exposure > exposure_ctrl->qctrl.minimum) | |
2382 | exposure--; | |
2383 | else if (gain > gain_ctrl->qctrl.minimum) | |
2384 | gain--; | |
2385 | else | |
2386 | break; | |
2387 | } else { | |
2388 | if (gain < gain_ctrl->qctrl.default_value) | |
2389 | gain++; | |
2390 | else if (exposure < exposure_knee) | |
2391 | exposure++; | |
2392 | else if (gain < gain_knee) | |
2393 | gain++; | |
2394 | else if (exposure < exposure_ctrl->qctrl.maximum) | |
2395 | exposure++; | |
2396 | else if (gain < gain_ctrl->qctrl.maximum) | |
2397 | gain++; | |
2398 | else | |
2399 | break; | |
2400 | } | |
2401 | } | |
2402 | ||
2403 | if (gain != orig_gain) { | |
2404 | gain_ctrl->set(gspca_dev, gain); | |
2405 | retval = 1; | |
2406 | } | |
2407 | if (exposure != orig_exposure) { | |
2408 | exposure_ctrl->set(gspca_dev, exposure); | |
2409 | retval = 1; | |
2410 | } | |
2411 | ||
2412 | return retval; | |
2413 | } | |
2414 | EXPORT_SYMBOL(gspca_auto_gain_n_exposure); | |
2415 | ||
63eb9546 JFM |
2416 | /* -- module insert / remove -- */ |
2417 | static int __init gspca_init(void) | |
2418 | { | |
bb64e86c JFM |
2419 | info("main v%d.%d.%d registered", |
2420 | (DRIVER_VERSION_NUMBER >> 16) & 0xff, | |
2421 | (DRIVER_VERSION_NUMBER >> 8) & 0xff, | |
2422 | DRIVER_VERSION_NUMBER & 0xff); | |
63eb9546 JFM |
2423 | return 0; |
2424 | } | |
2425 | static void __exit gspca_exit(void) | |
2426 | { | |
2427 | info("main deregistered"); | |
2428 | } | |
2429 | ||
2430 | module_init(gspca_init); | |
2431 | module_exit(gspca_exit); | |
2432 | ||
335b3f88 | 2433 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
2434 | module_param_named(debug, gspca_debug, int, 0644); |
2435 | MODULE_PARM_DESC(debug, | |
2436 | "Debug (bit) 0x01:error 0x02:probe 0x04:config" | |
d43fa32f JFM |
2437 | " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout" |
2438 | " 0x0100: v4l2"); | |
6a7eba24 | 2439 | #endif |