Commit | Line | Data |
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63eb9546 JFM |
1 | /* |
2 | * Main USB camera driver | |
3 | * | |
59929cef | 4 | * Copyright (C) 2008-2011 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 | ||
133a9fe9 JP |
24 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
25 | ||
63eb9546 JFM |
26 | #define MODULE_NAME "gspca" |
27 | ||
28 | #include <linux/init.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/vmalloc.h> | |
31 | #include <linux/sched.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/mm.h> | |
34 | #include <linux/string.h> | |
35 | #include <linux/pagemap.h> | |
956e42d2 | 36 | #include <linux/io.h> |
63eb9546 | 37 | #include <asm/page.h> |
956e42d2 | 38 | #include <linux/uaccess.h> |
2f51d00f | 39 | #include <linux/ktime.h> |
35ea11ff | 40 | #include <media/v4l2-ioctl.h> |
63eb9546 JFM |
41 | |
42 | #include "gspca.h" | |
43 | ||
f7628015 | 44 | #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) |
0274d42e MN |
45 | #include <linux/input.h> |
46 | #include <linux/usb/input.h> | |
e070bf9e | 47 | #endif |
0274d42e | 48 | |
d43fa32f | 49 | /* global values */ |
8fee8453 JFM |
50 | #define DEF_NURBS 3 /* default number of URBs */ |
51 | #if DEF_NURBS > MAX_NURBS | |
52 | #error "DEF_NURBS too big" | |
53 | #endif | |
d43fa32f | 54 | |
b0eaab76 MCC |
55 | #define DRIVER_VERSION_NUMBER "2.13.0" |
56 | ||
27c6f9e5 | 57 | MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>"); |
63eb9546 JFM |
58 | MODULE_DESCRIPTION("GSPCA USB Camera Driver"); |
59 | MODULE_LICENSE("GPL"); | |
b0eaab76 | 60 | MODULE_VERSION(DRIVER_VERSION_NUMBER); |
63eb9546 | 61 | |
335b3f88 | 62 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
63 | int gspca_debug = D_ERR | D_PROBE; |
64 | EXPORT_SYMBOL(gspca_debug); | |
65 | ||
66 | static void PDEBUG_MODE(char *txt, __u32 pixfmt, int w, int h) | |
67 | { | |
68 | if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') { | |
69 | PDEBUG(D_CONF|D_STREAM, "%s %c%c%c%c %dx%d", | |
70 | txt, | |
71 | pixfmt & 0xff, | |
72 | (pixfmt >> 8) & 0xff, | |
73 | (pixfmt >> 16) & 0xff, | |
74 | pixfmt >> 24, | |
75 | w, h); | |
76 | } else { | |
77 | PDEBUG(D_CONF|D_STREAM, "%s 0x%08x %dx%d", | |
78 | txt, | |
79 | pixfmt, | |
80 | w, h); | |
81 | } | |
82 | } | |
83 | #else | |
84 | #define PDEBUG_MODE(txt, pixfmt, w, h) | |
85 | #endif | |
86 | ||
77ee3318 | 87 | /* specific memory types - !! should be different from V4L2_MEMORY_xxx */ |
d43fa32f JFM |
88 | #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */ |
89 | #define GSPCA_MEMORY_READ 7 | |
90 | ||
d43fa32f | 91 | #define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE) |
d43fa32f | 92 | |
63eb9546 JFM |
93 | /* |
94 | * VMA operations. | |
95 | */ | |
96 | static void gspca_vm_open(struct vm_area_struct *vma) | |
97 | { | |
98 | struct gspca_frame *frame = vma->vm_private_data; | |
99 | ||
100 | frame->vma_use_count++; | |
101 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED; | |
102 | } | |
103 | ||
104 | static void gspca_vm_close(struct vm_area_struct *vma) | |
105 | { | |
106 | struct gspca_frame *frame = vma->vm_private_data; | |
107 | ||
108 | if (--frame->vma_use_count <= 0) | |
109 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED; | |
110 | } | |
111 | ||
f0f37e2f | 112 | static const struct vm_operations_struct gspca_vm_ops = { |
63eb9546 JFM |
113 | .open = gspca_vm_open, |
114 | .close = gspca_vm_close, | |
115 | }; | |
116 | ||
0274d42e MN |
117 | /* |
118 | * Input and interrupt endpoint handling functions | |
119 | */ | |
f7628015 | 120 | #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) |
0274d42e MN |
121 | static void int_irq(struct urb *urb) |
122 | { | |
123 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
124 | int ret; | |
125 | ||
126 | ret = urb->status; | |
127 | switch (ret) { | |
128 | case 0: | |
129 | if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev, | |
130 | urb->transfer_buffer, urb->actual_length) < 0) { | |
131 | PDEBUG(D_ERR, "Unknown packet received"); | |
132 | } | |
133 | break; | |
134 | ||
135 | case -ENOENT: | |
136 | case -ECONNRESET: | |
137 | case -ENODEV: | |
138 | case -ESHUTDOWN: | |
139 | /* Stop is requested either by software or hardware is gone, | |
140 | * keep the ret value non-zero and don't resubmit later. | |
141 | */ | |
142 | break; | |
143 | ||
144 | default: | |
145 | PDEBUG(D_ERR, "URB error %i, resubmitting", urb->status); | |
146 | urb->status = 0; | |
147 | ret = 0; | |
148 | } | |
149 | ||
150 | if (ret == 0) { | |
151 | ret = usb_submit_urb(urb, GFP_ATOMIC); | |
152 | if (ret < 0) | |
133a9fe9 | 153 | pr_err("Resubmit URB failed with error %i\n", ret); |
0274d42e MN |
154 | } |
155 | } | |
156 | ||
157 | static int gspca_input_connect(struct gspca_dev *dev) | |
158 | { | |
159 | struct input_dev *input_dev; | |
160 | int err = 0; | |
161 | ||
162 | dev->input_dev = NULL; | |
ac82f59f | 163 | if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) { |
0274d42e MN |
164 | input_dev = input_allocate_device(); |
165 | if (!input_dev) | |
166 | return -ENOMEM; | |
167 | ||
168 | usb_make_path(dev->dev, dev->phys, sizeof(dev->phys)); | |
169 | strlcat(dev->phys, "/input0", sizeof(dev->phys)); | |
170 | ||
171 | input_dev->name = dev->sd_desc->name; | |
172 | input_dev->phys = dev->phys; | |
173 | ||
174 | usb_to_input_id(dev->dev, &input_dev->id); | |
175 | ||
176 | input_dev->evbit[0] = BIT_MASK(EV_KEY); | |
177 | input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA); | |
178 | input_dev->dev.parent = &dev->dev->dev; | |
179 | ||
180 | err = input_register_device(input_dev); | |
181 | if (err) { | |
133a9fe9 JP |
182 | pr_err("Input device registration failed with error %i\n", |
183 | err); | |
0274d42e MN |
184 | input_dev->dev.parent = NULL; |
185 | input_free_device(input_dev); | |
186 | } else { | |
187 | dev->input_dev = input_dev; | |
188 | } | |
10ee2402 | 189 | } |
0274d42e MN |
190 | |
191 | return err; | |
192 | } | |
193 | ||
194 | static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev, | |
195 | struct usb_endpoint_descriptor *ep) | |
196 | { | |
197 | unsigned int buffer_len; | |
198 | int interval; | |
199 | struct urb *urb; | |
200 | struct usb_device *dev; | |
201 | void *buffer = NULL; | |
202 | int ret = -EINVAL; | |
203 | ||
b26d6e21 | 204 | buffer_len = le16_to_cpu(ep->wMaxPacketSize); |
0274d42e | 205 | interval = ep->bInterval; |
c4dc692c | 206 | PDEBUG(D_CONF, "found int in endpoint: 0x%x, " |
0274d42e MN |
207 | "buffer_len=%u, interval=%u", |
208 | ep->bEndpointAddress, buffer_len, interval); | |
209 | ||
210 | dev = gspca_dev->dev; | |
211 | ||
212 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
213 | if (!urb) { | |
214 | ret = -ENOMEM; | |
215 | goto error; | |
216 | } | |
217 | ||
7a9b1492 | 218 | buffer = usb_alloc_coherent(dev, buffer_len, |
0274d42e MN |
219 | GFP_KERNEL, &urb->transfer_dma); |
220 | if (!buffer) { | |
221 | ret = -ENOMEM; | |
222 | goto error_buffer; | |
223 | } | |
224 | usb_fill_int_urb(urb, dev, | |
225 | usb_rcvintpipe(dev, ep->bEndpointAddress), | |
226 | buffer, buffer_len, | |
227 | int_irq, (void *)gspca_dev, interval); | |
882787ff | 228 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
0274d42e MN |
229 | ret = usb_submit_urb(urb, GFP_KERNEL); |
230 | if (ret < 0) { | |
c4dc692c | 231 | PDEBUG(D_ERR, "submit int URB failed with error %i", ret); |
0274d42e MN |
232 | goto error_submit; |
233 | } | |
2661da47 | 234 | gspca_dev->int_urb = urb; |
0274d42e MN |
235 | return ret; |
236 | ||
237 | error_submit: | |
997ea58e DM |
238 | usb_free_coherent(dev, |
239 | urb->transfer_buffer_length, | |
240 | urb->transfer_buffer, | |
241 | urb->transfer_dma); | |
0274d42e MN |
242 | error_buffer: |
243 | usb_free_urb(urb); | |
244 | error: | |
245 | return ret; | |
246 | } | |
247 | ||
10ee2402 | 248 | static void gspca_input_create_urb(struct gspca_dev *gspca_dev) |
0274d42e | 249 | { |
0274d42e MN |
250 | struct usb_interface *intf; |
251 | struct usb_host_interface *intf_desc; | |
252 | struct usb_endpoint_descriptor *ep; | |
253 | int i; | |
254 | ||
255 | if (gspca_dev->sd_desc->int_pkt_scan) { | |
256 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
257 | intf_desc = intf->cur_altsetting; | |
258 | for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { | |
259 | ep = &intf_desc->endpoint[i].desc; | |
260 | if (usb_endpoint_dir_in(ep) && | |
261 | usb_endpoint_xfer_int(ep)) { | |
262 | ||
10ee2402 | 263 | alloc_and_submit_int_urb(gspca_dev, ep); |
0274d42e MN |
264 | break; |
265 | } | |
266 | } | |
267 | } | |
0274d42e MN |
268 | } |
269 | ||
270 | static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) | |
271 | { | |
272 | struct urb *urb; | |
273 | ||
274 | urb = gspca_dev->int_urb; | |
275 | if (urb) { | |
276 | gspca_dev->int_urb = NULL; | |
277 | usb_kill_urb(urb); | |
997ea58e DM |
278 | usb_free_coherent(gspca_dev->dev, |
279 | urb->transfer_buffer_length, | |
280 | urb->transfer_buffer, | |
281 | urb->transfer_dma); | |
0274d42e MN |
282 | usb_free_urb(urb); |
283 | } | |
284 | } | |
f7628015 RD |
285 | #else |
286 | static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) | |
287 | { | |
288 | } | |
289 | ||
290 | static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev) | |
291 | { | |
292 | } | |
293 | ||
294 | static inline int gspca_input_connect(struct gspca_dev *dev) | |
295 | { | |
296 | return 0; | |
297 | } | |
0274d42e MN |
298 | #endif |
299 | ||
63eb9546 | 300 | /* |
d43fa32f | 301 | * fill a video frame from an URB and resubmit |
63eb9546 | 302 | */ |
d43fa32f JFM |
303 | static void fill_frame(struct gspca_dev *gspca_dev, |
304 | struct urb *urb) | |
63eb9546 | 305 | { |
8d584a53 | 306 | u8 *data; /* address of data in the iso message */ |
1b60e1ad | 307 | int i, len, st; |
63eb9546 JFM |
308 | cam_pkt_op pkt_scan; |
309 | ||
6a7eba24 | 310 | if (urb->status != 0) { |
090264e5 JFM |
311 | if (urb->status == -ESHUTDOWN) |
312 | return; /* disconnection */ | |
62ee8eee | 313 | #ifdef CONFIG_PM |
6a540bdf HG |
314 | if (gspca_dev->frozen) |
315 | return; | |
62ee8eee | 316 | #endif |
6a540bdf | 317 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); |
8157852f | 318 | urb->status = 0; |
bf926adf | 319 | goto resubmit; |
6a7eba24 | 320 | } |
63eb9546 JFM |
321 | pkt_scan = gspca_dev->sd_desc->pkt_scan; |
322 | for (i = 0; i < urb->number_of_packets; i++) { | |
95f18be2 | 323 | len = urb->iso_frame_desc[i].actual_length; |
63eb9546 | 324 | |
63eb9546 | 325 | /* check the packet status and length */ |
63eb9546 JFM |
326 | st = urb->iso_frame_desc[i].status; |
327 | if (st) { | |
133a9fe9 JP |
328 | pr_err("ISOC data error: [%d] len=%d, status=%d\n", |
329 | i, len, st); | |
63eb9546 JFM |
330 | gspca_dev->last_packet_type = DISCARD_PACKET; |
331 | continue; | |
332 | } | |
76ebc16b JFM |
333 | if (len == 0) { |
334 | if (gspca_dev->empty_packet == 0) | |
335 | gspca_dev->empty_packet = 1; | |
336 | continue; | |
337 | } | |
63eb9546 JFM |
338 | |
339 | /* let the packet be analyzed by the subdriver */ | |
340 | PDEBUG(D_PACK, "packet [%d] o:%d l:%d", | |
341 | i, urb->iso_frame_desc[i].offset, len); | |
8d584a53 | 342 | data = (u8 *) urb->transfer_buffer |
63eb9546 | 343 | + urb->iso_frame_desc[i].offset; |
76dd272b | 344 | pkt_scan(gspca_dev, data, len); |
63eb9546 JFM |
345 | } |
346 | ||
bf926adf | 347 | resubmit: |
63eb9546 | 348 | /* resubmit the URB */ |
63eb9546 JFM |
349 | st = usb_submit_urb(urb, GFP_ATOMIC); |
350 | if (st < 0) | |
133a9fe9 | 351 | pr_err("usb_submit_urb() ret %d\n", st); |
63eb9546 JFM |
352 | } |
353 | ||
d43fa32f JFM |
354 | /* |
355 | * ISOC message interrupt from the USB device | |
356 | * | |
ac0d6df6 | 357 | * Analyse each packet and call the subdriver for copy to the frame buffer. |
d43fa32f | 358 | */ |
8d584a53 | 359 | static void isoc_irq(struct urb *urb) |
d43fa32f JFM |
360 | { |
361 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
362 | ||
3647fea8 | 363 | PDEBUG(D_PACK, "isoc irq"); |
d43fa32f JFM |
364 | if (!gspca_dev->streaming) |
365 | return; | |
366 | fill_frame(gspca_dev, urb); | |
367 | } | |
368 | ||
0be01004 JFM |
369 | /* |
370 | * bulk message interrupt from the USB device | |
371 | */ | |
8d584a53 | 372 | static void bulk_irq(struct urb *urb) |
0be01004 JFM |
373 | { |
374 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
dff369aa | 375 | int st; |
0be01004 JFM |
376 | |
377 | PDEBUG(D_PACK, "bulk irq"); | |
378 | if (!gspca_dev->streaming) | |
379 | return; | |
880ae24d JFM |
380 | switch (urb->status) { |
381 | case 0: | |
382 | break; | |
090264e5 JFM |
383 | case -ESHUTDOWN: |
384 | return; /* disconnection */ | |
880ae24d | 385 | default: |
0be01004 | 386 | #ifdef CONFIG_PM |
6a540bdf HG |
387 | if (gspca_dev->frozen) |
388 | return; | |
0be01004 | 389 | #endif |
6a540bdf | 390 | PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status); |
8157852f | 391 | urb->status = 0; |
bf926adf | 392 | goto resubmit; |
0be01004 JFM |
393 | } |
394 | ||
d131c3c9 JFM |
395 | PDEBUG(D_PACK, "packet l:%d", urb->actual_length); |
396 | gspca_dev->sd_desc->pkt_scan(gspca_dev, | |
d131c3c9 JFM |
397 | urb->transfer_buffer, |
398 | urb->actual_length); | |
dff369aa | 399 | |
bf926adf | 400 | resubmit: |
dff369aa AO |
401 | /* resubmit the URB */ |
402 | if (gspca_dev->cam.bulk_nurbs != 0) { | |
403 | st = usb_submit_urb(urb, GFP_ATOMIC); | |
404 | if (st < 0) | |
133a9fe9 | 405 | pr_err("usb_submit_urb() ret %d\n", st); |
dff369aa | 406 | } |
0be01004 JFM |
407 | } |
408 | ||
63eb9546 JFM |
409 | /* |
410 | * add data to the current frame | |
411 | * | |
ac0d6df6 JFM |
412 | * This function is called by the subdrivers at interrupt level. |
413 | * | |
63eb9546 JFM |
414 | * To build a frame, these ones must add |
415 | * - one FIRST_PACKET | |
416 | * - 0 or many INTER_PACKETs | |
417 | * - one LAST_PACKET | |
418 | * DISCARD_PACKET invalidates the whole frame. | |
63eb9546 | 419 | */ |
76dd272b JFM |
420 | void gspca_frame_add(struct gspca_dev *gspca_dev, |
421 | enum gspca_packet_type packet_type, | |
422 | const u8 *data, | |
423 | int len) | |
63eb9546 | 424 | { |
3ec342f2 | 425 | struct gspca_frame *frame; |
63eb9546 JFM |
426 | int i, j; |
427 | ||
e2997a72 | 428 | PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len); |
d131c3c9 | 429 | |
63eb9546 | 430 | if (packet_type == FIRST_PACKET) { |
f7059eaa JFM |
431 | i = atomic_read(&gspca_dev->fr_i); |
432 | ||
433 | /* if there are no queued buffer, discard the whole frame */ | |
434 | if (i == atomic_read(&gspca_dev->fr_q)) { | |
435 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
2e0544a8 | 436 | gspca_dev->sequence++; |
f7059eaa JFM |
437 | return; |
438 | } | |
b192ca98 JFM |
439 | j = gspca_dev->fr_queue[i]; |
440 | frame = &gspca_dev->frame[j]; | |
2f51d00f | 441 | frame->v4l2_buf.timestamp = ktime_to_timeval(ktime_get()); |
2e0544a8 | 442 | frame->v4l2_buf.sequence = gspca_dev->sequence++; |
f7059eaa | 443 | gspca_dev->image = frame->data; |
b192ca98 | 444 | gspca_dev->image_len = 0; |
fe988f56 JFM |
445 | } else { |
446 | switch (gspca_dev->last_packet_type) { | |
447 | case DISCARD_PACKET: | |
fa4376d2 | 448 | if (packet_type == LAST_PACKET) { |
fe988f56 | 449 | gspca_dev->last_packet_type = packet_type; |
fa4376d2 HG |
450 | gspca_dev->image = NULL; |
451 | gspca_dev->image_len = 0; | |
452 | } | |
fe988f56 JFM |
453 | return; |
454 | case LAST_PACKET: | |
455 | return; | |
456 | } | |
d43fa32f | 457 | } |
63eb9546 | 458 | |
d43fa32f | 459 | /* append the packet to the frame buffer */ |
63eb9546 | 460 | if (len > 0) { |
b192ca98 JFM |
461 | if (gspca_dev->image_len + len > gspca_dev->frsz) { |
462 | PDEBUG(D_ERR|D_PACK, "frame overflow %d > %d", | |
463 | gspca_dev->image_len + len, | |
464 | gspca_dev->frsz); | |
63eb9546 JFM |
465 | packet_type = DISCARD_PACKET; |
466 | } else { | |
fe988f56 JFM |
467 | /* !! image is NULL only when last pkt is LAST or DISCARD |
468 | if (gspca_dev->image == NULL) { | |
133a9fe9 | 469 | pr_err("gspca_frame_add() image == NULL\n"); |
fe988f56 JFM |
470 | return; |
471 | } | |
472 | */ | |
b192ca98 JFM |
473 | memcpy(gspca_dev->image + gspca_dev->image_len, |
474 | data, len); | |
475 | gspca_dev->image_len += len; | |
63eb9546 JFM |
476 | } |
477 | } | |
478 | gspca_dev->last_packet_type = packet_type; | |
479 | ||
f7059eaa JFM |
480 | /* if last packet, invalidate packet concatenation until |
481 | * next first packet, wake up the application and advance | |
482 | * in the queue */ | |
63eb9546 | 483 | if (packet_type == LAST_PACKET) { |
f7059eaa | 484 | i = atomic_read(&gspca_dev->fr_i); |
b192ca98 JFM |
485 | j = gspca_dev->fr_queue[i]; |
486 | frame = &gspca_dev->frame[j]; | |
487 | frame->v4l2_buf.bytesused = gspca_dev->image_len; | |
02bbcb9d JFM |
488 | frame->v4l2_buf.flags = (frame->v4l2_buf.flags |
489 | | V4L2_BUF_FLAG_DONE) | |
490 | & ~V4L2_BUF_FLAG_QUEUED; | |
f7059eaa JFM |
491 | i = (i + 1) % GSPCA_MAX_FRAMES; |
492 | atomic_set(&gspca_dev->fr_i, i); | |
63eb9546 | 493 | wake_up_interruptible(&gspca_dev->wq); /* event = new frame */ |
f7059eaa JFM |
494 | PDEBUG(D_FRAM, "frame complete len:%d", |
495 | frame->v4l2_buf.bytesused); | |
496 | gspca_dev->image = NULL; | |
497 | gspca_dev->image_len = 0; | |
63eb9546 | 498 | } |
63eb9546 JFM |
499 | } |
500 | EXPORT_SYMBOL(gspca_frame_add); | |
501 | ||
502 | static int gspca_is_compressed(__u32 format) | |
503 | { | |
504 | switch (format) { | |
505 | case V4L2_PIX_FMT_MJPEG: | |
506 | case V4L2_PIX_FMT_JPEG: | |
50a871fe | 507 | case V4L2_PIX_FMT_SPCA561: |
ab8f12cf | 508 | case V4L2_PIX_FMT_PAC207: |
d661e622 | 509 | case V4L2_PIX_FMT_MR97310A: |
63eb9546 JFM |
510 | return 1; |
511 | } | |
512 | return 0; | |
513 | } | |
514 | ||
d642de2e HG |
515 | static int frame_alloc(struct gspca_dev *gspca_dev, struct file *file, |
516 | enum v4l2_memory memory, unsigned int count) | |
63eb9546 | 517 | { |
d43fa32f JFM |
518 | struct gspca_frame *frame; |
519 | unsigned int frsz; | |
520 | int i; | |
63eb9546 | 521 | |
c2446b3e JFM |
522 | i = gspca_dev->curr_mode; |
523 | frsz = gspca_dev->cam.cam_mode[i].sizeimage; | |
63eb9546 | 524 | PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz); |
63eb9546 | 525 | frsz = PAGE_ALIGN(frsz); |
f7059eaa JFM |
526 | if (count >= GSPCA_MAX_FRAMES) |
527 | count = GSPCA_MAX_FRAMES - 1; | |
e795d912 | 528 | gspca_dev->frbuf = vmalloc_32(frsz * count); |
ac0d6df6 | 529 | if (!gspca_dev->frbuf) { |
133a9fe9 | 530 | pr_err("frame alloc failed\n"); |
ac0d6df6 | 531 | return -ENOMEM; |
63eb9546 | 532 | } |
d642de2e HG |
533 | gspca_dev->capt_file = file; |
534 | gspca_dev->memory = memory; | |
535 | gspca_dev->frsz = frsz; | |
63eb9546 JFM |
536 | gspca_dev->nframes = count; |
537 | for (i = 0; i < count; i++) { | |
d43fa32f JFM |
538 | frame = &gspca_dev->frame[i]; |
539 | frame->v4l2_buf.index = i; | |
540 | frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
541 | frame->v4l2_buf.flags = 0; | |
542 | frame->v4l2_buf.field = V4L2_FIELD_NONE; | |
543 | frame->v4l2_buf.length = frsz; | |
d642de2e | 544 | frame->v4l2_buf.memory = memory; |
d43fa32f | 545 | frame->v4l2_buf.sequence = 0; |
b192ca98 | 546 | frame->data = gspca_dev->frbuf + i * frsz; |
ac0d6df6 | 547 | frame->v4l2_buf.m.offset = i * frsz; |
63eb9546 | 548 | } |
f7059eaa JFM |
549 | atomic_set(&gspca_dev->fr_q, 0); |
550 | atomic_set(&gspca_dev->fr_i, 0); | |
551 | gspca_dev->fr_o = 0; | |
d43fa32f | 552 | return 0; |
63eb9546 JFM |
553 | } |
554 | ||
555 | static void frame_free(struct gspca_dev *gspca_dev) | |
556 | { | |
557 | int i; | |
558 | ||
559 | PDEBUG(D_STREAM, "frame free"); | |
efab8211 | 560 | if (gspca_dev->frbuf != NULL) { |
e795d912 | 561 | vfree(gspca_dev->frbuf); |
63eb9546 JFM |
562 | gspca_dev->frbuf = NULL; |
563 | for (i = 0; i < gspca_dev->nframes; i++) | |
564 | gspca_dev->frame[i].data = NULL; | |
565 | } | |
566 | gspca_dev->nframes = 0; | |
d642de2e HG |
567 | gspca_dev->frsz = 0; |
568 | gspca_dev->capt_file = NULL; | |
569 | gspca_dev->memory = GSPCA_MEMORY_NO; | |
63eb9546 JFM |
570 | } |
571 | ||
d43fa32f | 572 | static void destroy_urbs(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
573 | { |
574 | struct urb *urb; | |
575 | unsigned int i; | |
576 | ||
577 | PDEBUG(D_STREAM, "kill transfer"); | |
44732819 | 578 | for (i = 0; i < MAX_NURBS; i++) { |
4aa0d037 | 579 | urb = gspca_dev->urb[i]; |
63eb9546 | 580 | if (urb == NULL) |
d43fa32f | 581 | break; |
63eb9546 | 582 | |
4aa0d037 | 583 | gspca_dev->urb[i] = NULL; |
090264e5 | 584 | usb_kill_urb(urb); |
efab8211 | 585 | if (urb->transfer_buffer != NULL) |
997ea58e DM |
586 | usb_free_coherent(gspca_dev->dev, |
587 | urb->transfer_buffer_length, | |
588 | urb->transfer_buffer, | |
589 | urb->transfer_dma); | |
63eb9546 JFM |
590 | usb_free_urb(urb); |
591 | } | |
63eb9546 JFM |
592 | } |
593 | ||
e4dac289 JFM |
594 | static int gspca_set_alt0(struct gspca_dev *gspca_dev) |
595 | { | |
596 | int ret; | |
597 | ||
598 | if (gspca_dev->alt == 0) | |
599 | return 0; | |
600 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0); | |
601 | if (ret < 0) | |
133a9fe9 | 602 | pr_err("set alt 0 err %d\n", ret); |
e4dac289 JFM |
603 | return ret; |
604 | } | |
605 | ||
606 | /* Note: both the queue and the usb locks should be held when calling this */ | |
607 | static void gspca_stream_off(struct gspca_dev *gspca_dev) | |
608 | { | |
609 | gspca_dev->streaming = 0; | |
610 | if (gspca_dev->present) { | |
611 | if (gspca_dev->sd_desc->stopN) | |
612 | gspca_dev->sd_desc->stopN(gspca_dev); | |
613 | destroy_urbs(gspca_dev); | |
614 | gspca_input_destroy_urb(gspca_dev); | |
615 | gspca_set_alt0(gspca_dev); | |
616 | gspca_input_create_urb(gspca_dev); | |
617 | } | |
618 | ||
619 | /* always call stop0 to free the subdriver's resources */ | |
620 | if (gspca_dev->sd_desc->stop0) | |
621 | gspca_dev->sd_desc->stop0(gspca_dev); | |
622 | PDEBUG(D_STREAM, "stream off OK"); | |
623 | } | |
624 | ||
63eb9546 | 625 | /* |
219423c1 | 626 | * look for an input transfer endpoint in an alternate setting |
63eb9546 | 627 | */ |
0be01004 | 628 | static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, |
6929dc6b | 629 | int xfer) |
63eb9546 JFM |
630 | { |
631 | struct usb_host_endpoint *ep; | |
632 | int i, attr; | |
633 | ||
63eb9546 JFM |
634 | for (i = 0; i < alt->desc.bNumEndpoints; i++) { |
635 | ep = &alt->endpoint[i]; | |
50e06dee | 636 | attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; |
30d35e49 | 637 | if (attr == xfer |
7106225a PC |
638 | && ep->desc.wMaxPacketSize != 0 |
639 | && usb_endpoint_dir_in(&ep->desc)) | |
50e06dee | 640 | return ep; |
63eb9546 JFM |
641 | } |
642 | return NULL; | |
643 | } | |
644 | ||
645 | /* | |
219423c1 | 646 | * look for an input (isoc or bulk) endpoint |
63eb9546 JFM |
647 | * |
648 | * The endpoint is defined by the subdriver. | |
649 | * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep). | |
650 | * This routine may be called many times when the bandwidth is too small | |
651 | * (the bandwidth is checked on urb submit). | |
652 | */ | |
0be01004 | 653 | static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
654 | { |
655 | struct usb_interface *intf; | |
656 | struct usb_host_endpoint *ep; | |
6929dc6b | 657 | int xfer, i, ret; |
63eb9546 JFM |
658 | |
659 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
6a7eba24 | 660 | ep = NULL; |
6929dc6b JFM |
661 | xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK |
662 | : USB_ENDPOINT_XFER_ISOC; | |
63eb9546 | 663 | i = gspca_dev->alt; /* previous alt setting */ |
a511ba94 HG |
664 | if (gspca_dev->cam.reverse_alts) { |
665 | while (++i < gspca_dev->nbalt) { | |
666 | ep = alt_xfer(&intf->altsetting[i], xfer); | |
667 | if (ep) | |
668 | break; | |
669 | } | |
670 | } else { | |
671 | while (--i >= 0) { | |
672 | ep = alt_xfer(&intf->altsetting[i], xfer); | |
673 | if (ep) | |
674 | break; | |
675 | } | |
63eb9546 | 676 | } |
6a7eba24 | 677 | if (ep == NULL) { |
133a9fe9 | 678 | pr_err("no transfer endpoint found\n"); |
6929dc6b | 679 | return NULL; |
63eb9546 | 680 | } |
0be01004 | 681 | PDEBUG(D_STREAM, "use alt %d ep 0x%02x", |
63eb9546 | 682 | i, ep->desc.bEndpointAddress); |
1c8336d3 | 683 | gspca_dev->alt = i; /* memorize the current alt setting */ |
8dd07ef1 | 684 | if (gspca_dev->nbalt > 1) { |
95d9142c JFM |
685 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i); |
686 | if (ret < 0) { | |
133a9fe9 | 687 | pr_err("set alt %d err %d\n", i, ret); |
0274d42e | 688 | ep = NULL; |
95d9142c | 689 | } |
63eb9546 | 690 | } |
63eb9546 JFM |
691 | return ep; |
692 | } | |
693 | ||
694 | /* | |
0be01004 | 695 | * create the URBs for image transfer |
63eb9546 JFM |
696 | */ |
697 | static int create_urbs(struct gspca_dev *gspca_dev, | |
698 | struct usb_host_endpoint *ep) | |
699 | { | |
700 | struct urb *urb; | |
d43fa32f | 701 | int n, nurbs, i, psize, npkt, bsize; |
63eb9546 JFM |
702 | |
703 | /* calculate the packet size and the number of packets */ | |
63eb9546 | 704 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
d43fa32f | 705 | |
6929dc6b | 706 | if (!gspca_dev->cam.bulk) { /* isoc */ |
95d9142c JFM |
707 | |
708 | /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ | |
1f53b0b0 JFM |
709 | if (gspca_dev->pkt_size == 0) |
710 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); | |
711 | else | |
712 | psize = gspca_dev->pkt_size; | |
49cb6b04 JFM |
713 | npkt = gspca_dev->cam.npkt; |
714 | if (npkt == 0) | |
715 | npkt = 32; /* default value */ | |
0be01004 JFM |
716 | bsize = psize * npkt; |
717 | PDEBUG(D_STREAM, | |
718 | "isoc %d pkts size %d = bsize:%d", | |
719 | npkt, psize, bsize); | |
51977a8d | 720 | nurbs = DEF_NURBS; |
95d9142c | 721 | } else { /* bulk */ |
0be01004 | 722 | npkt = 0; |
dff369aa | 723 | bsize = gspca_dev->cam.bulk_size; |
95d9142c JFM |
724 | if (bsize == 0) |
725 | bsize = psize; | |
0be01004 | 726 | PDEBUG(D_STREAM, "bulk bsize:%d", bsize); |
dff369aa AO |
727 | if (gspca_dev->cam.bulk_nurbs != 0) |
728 | nurbs = gspca_dev->cam.bulk_nurbs; | |
729 | else | |
730 | nurbs = 1; | |
0be01004 JFM |
731 | } |
732 | ||
d43fa32f | 733 | for (n = 0; n < nurbs; n++) { |
63eb9546 JFM |
734 | urb = usb_alloc_urb(npkt, GFP_KERNEL); |
735 | if (!urb) { | |
133a9fe9 | 736 | pr_err("usb_alloc_urb failed\n"); |
63eb9546 JFM |
737 | return -ENOMEM; |
738 | } | |
db870875 | 739 | gspca_dev->urb[n] = urb; |
997ea58e | 740 | urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev, |
63eb9546 JFM |
741 | bsize, |
742 | GFP_KERNEL, | |
743 | &urb->transfer_dma); | |
744 | ||
4aa0d037 | 745 | if (urb->transfer_buffer == NULL) { |
133a9fe9 | 746 | pr_err("usb_alloc_coherent failed\n"); |
63eb9546 JFM |
747 | return -ENOMEM; |
748 | } | |
63eb9546 JFM |
749 | urb->dev = gspca_dev->dev; |
750 | urb->context = gspca_dev; | |
63eb9546 | 751 | urb->transfer_buffer_length = bsize; |
0be01004 JFM |
752 | if (npkt != 0) { /* ISOC */ |
753 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, | |
754 | ep->desc.bEndpointAddress); | |
6c49da7f FZ |
755 | urb->transfer_flags = URB_ISO_ASAP |
756 | | URB_NO_TRANSFER_DMA_MAP; | |
480992b3 JFM |
757 | if (gspca_dev->dev->speed == USB_SPEED_LOW) |
758 | urb->interval = ep->desc.bInterval; | |
759 | else | |
760 | urb->interval = 1 << (ep->desc.bInterval - 1); | |
0be01004 JFM |
761 | urb->complete = isoc_irq; |
762 | urb->number_of_packets = npkt; | |
763 | for (i = 0; i < npkt; i++) { | |
764 | urb->iso_frame_desc[i].length = psize; | |
765 | urb->iso_frame_desc[i].offset = psize * i; | |
766 | } | |
767 | } else { /* bulk */ | |
768 | urb->pipe = usb_rcvbulkpipe(gspca_dev->dev, | |
a23c1947 | 769 | ep->desc.bEndpointAddress); |
6c49da7f | 770 | urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; |
0be01004 | 771 | urb->complete = bulk_irq; |
63eb9546 JFM |
772 | } |
773 | } | |
774 | return 0; | |
775 | } | |
776 | ||
777 | /* | |
778 | * start the USB transfer | |
779 | */ | |
780 | static int gspca_init_transfer(struct gspca_dev *gspca_dev) | |
781 | { | |
63eb9546 | 782 | struct usb_host_endpoint *ep; |
db870875 | 783 | struct urb *urb; |
63eb9546 JFM |
784 | int n, ret; |
785 | ||
e2997a72 HG |
786 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
787 | return -ERESTARTSYS; | |
63eb9546 | 788 | |
090264e5 JFM |
789 | if (!gspca_dev->present) { |
790 | ret = -ENODEV; | |
314b3e08 | 791 | goto unlock; |
090264e5 JFM |
792 | } |
793 | ||
f7059eaa JFM |
794 | /* reset the streaming variables */ |
795 | gspca_dev->image = NULL; | |
796 | gspca_dev->image_len = 0; | |
797 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
798 | gspca_dev->sequence = 0; | |
799 | ||
ab6c8cf2 JFM |
800 | gspca_dev->usb_err = 0; |
801 | ||
d43fa32f JFM |
802 | /* set the higher alternate setting and |
803 | * loop until urb submit succeeds */ | |
a511ba94 HG |
804 | if (gspca_dev->cam.reverse_alts) |
805 | gspca_dev->alt = 0; | |
806 | else | |
807 | gspca_dev->alt = gspca_dev->nbalt; | |
808 | ||
1f53b0b0 JFM |
809 | if (gspca_dev->sd_desc->isoc_init) { |
810 | ret = gspca_dev->sd_desc->isoc_init(gspca_dev); | |
811 | if (ret < 0) | |
314b3e08 | 812 | goto unlock; |
1f53b0b0 | 813 | } |
314b3e08 HG |
814 | |
815 | gspca_input_destroy_urb(gspca_dev); | |
1f53b0b0 JFM |
816 | ep = get_ep(gspca_dev); |
817 | if (ep == NULL) { | |
818 | ret = -EIO; | |
819 | goto out; | |
820 | } | |
63eb9546 | 821 | for (;;) { |
47aaca96 JFM |
822 | if (!gspca_dev->cam.no_urb_create) { |
823 | PDEBUG(D_STREAM, "init transfer alt %d", | |
824 | gspca_dev->alt); | |
825 | ret = create_urbs(gspca_dev, ep); | |
826 | if (ret < 0) { | |
827 | destroy_urbs(gspca_dev); | |
828 | goto out; | |
829 | } | |
db870875 | 830 | } |
63eb9546 | 831 | |
8fe2f1d5 | 832 | /* clear the bulk endpoint */ |
6929dc6b | 833 | if (gspca_dev->cam.bulk) |
8fe2f1d5 | 834 | usb_clear_halt(gspca_dev->dev, |
50e06dee | 835 | gspca_dev->urb[0]->pipe); |
8fe2f1d5 | 836 | |
63eb9546 | 837 | /* start the cam */ |
72ab97ce JFM |
838 | ret = gspca_dev->sd_desc->start(gspca_dev); |
839 | if (ret < 0) { | |
840 | destroy_urbs(gspca_dev); | |
841 | goto out; | |
842 | } | |
63eb9546 | 843 | gspca_dev->streaming = 1; |
63eb9546 | 844 | |
dff369aa | 845 | /* some bulk transfers are started by the subdriver */ |
6929dc6b | 846 | if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0) |
51977a8d JFM |
847 | break; |
848 | ||
63eb9546 | 849 | /* submit the URBs */ |
db870875 JFM |
850 | for (n = 0; n < MAX_NURBS; n++) { |
851 | urb = gspca_dev->urb[n]; | |
852 | if (urb == NULL) | |
853 | break; | |
854 | ret = usb_submit_urb(urb, GFP_KERNEL); | |
1f53b0b0 JFM |
855 | if (ret < 0) |
856 | break; | |
63eb9546 JFM |
857 | } |
858 | if (ret >= 0) | |
859 | break; | |
e4dac289 | 860 | gspca_stream_off(gspca_dev); |
4bdf4a83 | 861 | if (ret != -ENOSPC) { |
133a9fe9 JP |
862 | pr_err("usb_submit_urb alt %d err %d\n", |
863 | gspca_dev->alt, ret); | |
1f53b0b0 | 864 | goto out; |
4bdf4a83 | 865 | } |
1f53b0b0 JFM |
866 | |
867 | /* the bandwidth is not wide enough | |
25985edc | 868 | * negotiate or try a lower alternate setting */ |
4bdf4a83 JFM |
869 | PDEBUG(D_ERR|D_STREAM, |
870 | "bandwidth not wide enough - trying again"); | |
1f53b0b0 JFM |
871 | msleep(20); /* wait for kill complete */ |
872 | if (gspca_dev->sd_desc->isoc_nego) { | |
873 | ret = gspca_dev->sd_desc->isoc_nego(gspca_dev); | |
874 | if (ret < 0) | |
875 | goto out; | |
876 | } else { | |
877 | ep = get_ep(gspca_dev); | |
878 | if (ep == NULL) { | |
879 | ret = -EIO; | |
880 | goto out; | |
881 | } | |
882 | } | |
63eb9546 JFM |
883 | } |
884 | out: | |
314b3e08 HG |
885 | gspca_input_create_urb(gspca_dev); |
886 | unlock: | |
63eb9546 JFM |
887 | mutex_unlock(&gspca_dev->usb_lock); |
888 | return ret; | |
889 | } | |
890 | ||
d43fa32f | 891 | static void gspca_set_default_mode(struct gspca_dev *gspca_dev) |
63eb9546 | 892 | { |
6a33091f | 893 | struct gspca_ctrl *ctrl; |
63eb9546 JFM |
894 | int i; |
895 | ||
896 | i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ | |
897 | gspca_dev->curr_mode = i; | |
898 | gspca_dev->width = gspca_dev->cam.cam_mode[i].width; | |
899 | gspca_dev->height = gspca_dev->cam.cam_mode[i].height; | |
c2446b3e | 900 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat; |
6a33091f JFM |
901 | |
902 | /* set the current control values to their default values | |
903 | * which may have changed in sd_init() */ | |
904 | ctrl = gspca_dev->cam.ctrls; | |
905 | if (ctrl != NULL) { | |
906 | for (i = 0; | |
907 | i < gspca_dev->sd_desc->nctrls; | |
908 | i++, ctrl++) | |
909 | ctrl->val = ctrl->def; | |
910 | } | |
63eb9546 JFM |
911 | } |
912 | ||
913 | static int wxh_to_mode(struct gspca_dev *gspca_dev, | |
914 | int width, int height) | |
915 | { | |
916 | int i; | |
917 | ||
d43fa32f JFM |
918 | for (i = gspca_dev->cam.nmodes; --i > 0; ) { |
919 | if (width >= gspca_dev->cam.cam_mode[i].width | |
920 | && height >= gspca_dev->cam.cam_mode[i].height) | |
63eb9546 JFM |
921 | break; |
922 | } | |
63eb9546 JFM |
923 | return i; |
924 | } | |
925 | ||
63eb9546 JFM |
926 | /* |
927 | * search a mode with the right pixel format | |
928 | */ | |
929 | static int gspca_get_mode(struct gspca_dev *gspca_dev, | |
930 | int mode, | |
931 | int pixfmt) | |
932 | { | |
933 | int modeU, modeD; | |
934 | ||
935 | modeU = modeD = mode; | |
936 | while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { | |
937 | if (--modeD >= 0) { | |
c2446b3e JFM |
938 | if (gspca_dev->cam.cam_mode[modeD].pixelformat |
939 | == pixfmt) | |
63eb9546 JFM |
940 | return modeD; |
941 | } | |
942 | if (++modeU < gspca_dev->cam.nmodes) { | |
c2446b3e JFM |
943 | if (gspca_dev->cam.cam_mode[modeU].pixelformat |
944 | == pixfmt) | |
63eb9546 JFM |
945 | return modeU; |
946 | } | |
947 | } | |
948 | return -EINVAL; | |
949 | } | |
950 | ||
af1d9afa BJ |
951 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
952 | static int vidioc_g_register(struct file *file, void *priv, | |
953 | struct v4l2_dbg_register *reg) | |
954 | { | |
955 | int ret; | |
956 | struct gspca_dev *gspca_dev = priv; | |
957 | ||
958 | if (!gspca_dev->sd_desc->get_chip_ident) | |
959 | return -EINVAL; | |
960 | ||
961 | if (!gspca_dev->sd_desc->get_register) | |
962 | return -EINVAL; | |
963 | ||
964 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
965 | return -ERESTARTSYS; | |
8c4ebae4 | 966 | gspca_dev->usb_err = 0; |
af1d9afa BJ |
967 | if (gspca_dev->present) |
968 | ret = gspca_dev->sd_desc->get_register(gspca_dev, reg); | |
969 | else | |
970 | ret = -ENODEV; | |
971 | mutex_unlock(&gspca_dev->usb_lock); | |
972 | ||
973 | return ret; | |
974 | } | |
975 | ||
976 | static int vidioc_s_register(struct file *file, void *priv, | |
977 | struct v4l2_dbg_register *reg) | |
978 | { | |
979 | int ret; | |
980 | struct gspca_dev *gspca_dev = priv; | |
981 | ||
982 | if (!gspca_dev->sd_desc->get_chip_ident) | |
983 | return -EINVAL; | |
984 | ||
985 | if (!gspca_dev->sd_desc->set_register) | |
986 | return -EINVAL; | |
987 | ||
988 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
989 | return -ERESTARTSYS; | |
8c4ebae4 | 990 | gspca_dev->usb_err = 0; |
af1d9afa BJ |
991 | if (gspca_dev->present) |
992 | ret = gspca_dev->sd_desc->set_register(gspca_dev, reg); | |
993 | else | |
994 | ret = -ENODEV; | |
995 | mutex_unlock(&gspca_dev->usb_lock); | |
996 | ||
997 | return ret; | |
998 | } | |
999 | #endif | |
1000 | ||
1001 | static int vidioc_g_chip_ident(struct file *file, void *priv, | |
1002 | struct v4l2_dbg_chip_ident *chip) | |
1003 | { | |
1004 | int ret; | |
1005 | struct gspca_dev *gspca_dev = priv; | |
1006 | ||
1007 | if (!gspca_dev->sd_desc->get_chip_ident) | |
1008 | return -EINVAL; | |
1009 | ||
1010 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1011 | return -ERESTARTSYS; | |
8c4ebae4 | 1012 | gspca_dev->usb_err = 0; |
af1d9afa BJ |
1013 | if (gspca_dev->present) |
1014 | ret = gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip); | |
1015 | else | |
1016 | ret = -ENODEV; | |
1017 | mutex_unlock(&gspca_dev->usb_lock); | |
1018 | ||
1019 | return ret; | |
1020 | } | |
1021 | ||
e078770a | 1022 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
1023 | struct v4l2_fmtdesc *fmtdesc) |
1024 | { | |
1025 | struct gspca_dev *gspca_dev = priv; | |
6a7eba24 | 1026 | int i, j, index; |
63eb9546 JFM |
1027 | __u32 fmt_tb[8]; |
1028 | ||
63eb9546 JFM |
1029 | /* give an index to each format */ |
1030 | index = 0; | |
1031 | j = 0; | |
1032 | for (i = gspca_dev->cam.nmodes; --i >= 0; ) { | |
c2446b3e | 1033 | fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
1034 | j = 0; |
1035 | for (;;) { | |
1036 | if (fmt_tb[j] == fmt_tb[index]) | |
1037 | break; | |
1038 | j++; | |
1039 | } | |
1040 | if (j == index) { | |
1041 | if (fmtdesc->index == index) | |
1042 | break; /* new format */ | |
1043 | index++; | |
80297125 | 1044 | if (index >= ARRAY_SIZE(fmt_tb)) |
63eb9546 JFM |
1045 | return -EINVAL; |
1046 | } | |
1047 | } | |
1048 | if (i < 0) | |
1049 | return -EINVAL; /* no more format */ | |
1050 | ||
63eb9546 JFM |
1051 | fmtdesc->pixelformat = fmt_tb[index]; |
1052 | if (gspca_is_compressed(fmt_tb[index])) | |
1053 | fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; | |
1054 | fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; | |
1055 | fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; | |
1056 | fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; | |
1057 | fmtdesc->description[3] = fmtdesc->pixelformat >> 24; | |
1058 | fmtdesc->description[4] = '\0'; | |
1059 | return 0; | |
1060 | } | |
1061 | ||
e078770a | 1062 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
1063 | struct v4l2_format *fmt) |
1064 | { | |
1065 | struct gspca_dev *gspca_dev = priv; | |
c2446b3e | 1066 | int mode; |
63eb9546 | 1067 | |
c2446b3e JFM |
1068 | mode = gspca_dev->curr_mode; |
1069 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], | |
1070 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
1071 | return 0; |
1072 | } | |
1073 | ||
e078770a | 1074 | static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1075 | struct v4l2_format *fmt) |
1076 | { | |
24c530b4 | 1077 | int w, h, mode, mode2; |
63eb9546 | 1078 | |
4aa0d037 JFM |
1079 | w = fmt->fmt.pix.width; |
1080 | h = fmt->fmt.pix.height; | |
d43fa32f | 1081 | |
335b3f88 | 1082 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
1083 | if (gspca_debug & D_CONF) |
1084 | PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h); | |
1085 | #endif | |
1086 | /* search the closest mode for width and height */ | |
1087 | mode = wxh_to_mode(gspca_dev, w, h); | |
1088 | ||
1089 | /* OK if right palette */ | |
c2446b3e JFM |
1090 | if (gspca_dev->cam.cam_mode[mode].pixelformat |
1091 | != fmt->fmt.pix.pixelformat) { | |
63eb9546 JFM |
1092 | |
1093 | /* else, search the closest mode with the same pixel format */ | |
1094 | mode2 = gspca_get_mode(gspca_dev, mode, | |
1095 | fmt->fmt.pix.pixelformat); | |
c2446b3e | 1096 | if (mode2 >= 0) |
63eb9546 | 1097 | mode = mode2; |
c2446b3e JFM |
1098 | /* else |
1099 | ; * no chance, return this mode */ | |
63eb9546 | 1100 | } |
c2446b3e JFM |
1101 | memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode], |
1102 | sizeof fmt->fmt.pix); | |
63eb9546 JFM |
1103 | return mode; /* used when s_fmt */ |
1104 | } | |
1105 | ||
e078770a | 1106 | static int vidioc_try_fmt_vid_cap(struct file *file, |
63eb9546 JFM |
1107 | void *priv, |
1108 | struct v4l2_format *fmt) | |
1109 | { | |
4aa0d037 | 1110 | struct gspca_dev *gspca_dev = priv; |
63eb9546 JFM |
1111 | int ret; |
1112 | ||
e078770a | 1113 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
1114 | if (ret < 0) |
1115 | return ret; | |
1116 | return 0; | |
1117 | } | |
1118 | ||
e078770a | 1119 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
1120 | struct v4l2_format *fmt) |
1121 | { | |
1122 | struct gspca_dev *gspca_dev = priv; | |
d43fa32f | 1123 | int ret; |
63eb9546 | 1124 | |
e2997a72 HG |
1125 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1126 | return -ERESTARTSYS; | |
d43fa32f | 1127 | |
e078770a | 1128 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
1129 | if (ret < 0) |
1130 | goto out; | |
1131 | ||
d43fa32f JFM |
1132 | if (gspca_dev->nframes != 0 |
1133 | && fmt->fmt.pix.sizeimage > gspca_dev->frsz) { | |
1134 | ret = -EINVAL; | |
1135 | goto out; | |
1136 | } | |
1137 | ||
50a871fe JFM |
1138 | if (ret == gspca_dev->curr_mode) { |
1139 | ret = 0; | |
63eb9546 | 1140 | goto out; /* same mode */ |
50a871fe | 1141 | } |
d43fa32f JFM |
1142 | |
1143 | if (gspca_dev->streaming) { | |
1144 | ret = -EBUSY; | |
1145 | goto out; | |
e2997a72 | 1146 | } |
4aa0d037 JFM |
1147 | gspca_dev->width = fmt->fmt.pix.width; |
1148 | gspca_dev->height = fmt->fmt.pix.height; | |
63eb9546 JFM |
1149 | gspca_dev->pixfmt = fmt->fmt.pix.pixelformat; |
1150 | gspca_dev->curr_mode = ret; | |
d43fa32f | 1151 | |
d43fa32f | 1152 | ret = 0; |
63eb9546 JFM |
1153 | out: |
1154 | mutex_unlock(&gspca_dev->queue_lock); | |
1155 | return ret; | |
1156 | } | |
1157 | ||
11c635a2 HG |
1158 | static int vidioc_enum_framesizes(struct file *file, void *priv, |
1159 | struct v4l2_frmsizeenum *fsize) | |
1160 | { | |
1161 | struct gspca_dev *gspca_dev = priv; | |
1162 | int i; | |
1163 | __u32 index = 0; | |
1164 | ||
1165 | for (i = 0; i < gspca_dev->cam.nmodes; i++) { | |
1166 | if (fsize->pixel_format != | |
1167 | gspca_dev->cam.cam_mode[i].pixelformat) | |
1168 | continue; | |
1169 | ||
1170 | if (fsize->index == index) { | |
1171 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
1172 | fsize->discrete.width = | |
1173 | gspca_dev->cam.cam_mode[i].width; | |
1174 | fsize->discrete.height = | |
1175 | gspca_dev->cam.cam_mode[i].height; | |
1176 | return 0; | |
1177 | } | |
1178 | index++; | |
1179 | } | |
1180 | ||
1181 | return -EINVAL; | |
1182 | } | |
1183 | ||
28ffe77f AO |
1184 | static int vidioc_enum_frameintervals(struct file *filp, void *priv, |
1185 | struct v4l2_frmivalenum *fival) | |
1186 | { | |
1187 | struct gspca_dev *gspca_dev = priv; | |
1188 | int mode = wxh_to_mode(gspca_dev, fival->width, fival->height); | |
1189 | __u32 i; | |
1190 | ||
1191 | if (gspca_dev->cam.mode_framerates == NULL || | |
1192 | gspca_dev->cam.mode_framerates[mode].nrates == 0) | |
1193 | return -EINVAL; | |
1194 | ||
1195 | if (fival->pixel_format != | |
1196 | gspca_dev->cam.cam_mode[mode].pixelformat) | |
1197 | return -EINVAL; | |
1198 | ||
1199 | for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) { | |
1200 | if (fival->index == i) { | |
1201 | fival->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
1202 | fival->discrete.numerator = 1; | |
1203 | fival->discrete.denominator = | |
1204 | gspca_dev->cam.mode_framerates[mode].rates[i]; | |
1205 | return 0; | |
1206 | } | |
1207 | } | |
1208 | ||
1209 | return -EINVAL; | |
1210 | } | |
1211 | ||
d0182306 | 1212 | static void gspca_release(struct video_device *vfd) |
6b060ffe | 1213 | { |
d0182306 | 1214 | struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev); |
6b060ffe | 1215 | |
38c7c036 LP |
1216 | PDEBUG(D_PROBE, "%s released", |
1217 | video_device_node_name(&gspca_dev->vdev)); | |
6b060ffe FZ |
1218 | |
1219 | kfree(gspca_dev->usb_buf); | |
1220 | kfree(gspca_dev); | |
1221 | } | |
1222 | ||
bec43661 | 1223 | static int dev_open(struct file *file) |
63eb9546 JFM |
1224 | { |
1225 | struct gspca_dev *gspca_dev; | |
63eb9546 | 1226 | |
0d07e240 | 1227 | PDEBUG(D_STREAM, "[%s] open", current->comm); |
a12ca6a6 | 1228 | gspca_dev = (struct gspca_dev *) video_devdata(file); |
7f6eb118 HG |
1229 | if (!gspca_dev->present) |
1230 | return -ENODEV; | |
5c4fa002 JFM |
1231 | |
1232 | /* protect the subdriver against rmmod */ | |
7f6eb118 HG |
1233 | if (!try_module_get(gspca_dev->module)) |
1234 | return -ENODEV; | |
6b060ffe | 1235 | |
63eb9546 | 1236 | file->private_data = gspca_dev; |
335b3f88 | 1237 | #ifdef GSPCA_DEBUG |
63eb9546 | 1238 | /* activate the v4l2 debug */ |
d43fa32f | 1239 | if (gspca_debug & D_V4L2) |
a12ca6a6 | 1240 | gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL |
9de436cf | 1241 | | V4L2_DEBUG_IOCTL_ARG; |
63eb9546 | 1242 | else |
a12ca6a6 | 1243 | gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL |
9de436cf | 1244 | | V4L2_DEBUG_IOCTL_ARG); |
63eb9546 | 1245 | #endif |
7f6eb118 | 1246 | return 0; |
63eb9546 JFM |
1247 | } |
1248 | ||
bec43661 | 1249 | static int dev_close(struct file *file) |
63eb9546 JFM |
1250 | { |
1251 | struct gspca_dev *gspca_dev = file->private_data; | |
1252 | ||
0d07e240 | 1253 | PDEBUG(D_STREAM, "[%s] close", current->comm); |
e2997a72 HG |
1254 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1255 | return -ERESTARTSYS; | |
e2997a72 | 1256 | |
5b77ae77 | 1257 | /* if the file did the capture, free the streaming resources */ |
4aa0d037 | 1258 | if (gspca_dev->capt_file == file) { |
a1e8288b JFM |
1259 | if (gspca_dev->streaming) { |
1260 | mutex_lock(&gspca_dev->usb_lock); | |
8c4ebae4 | 1261 | gspca_dev->usb_err = 0; |
a1e8288b JFM |
1262 | gspca_stream_off(gspca_dev); |
1263 | mutex_unlock(&gspca_dev->usb_lock); | |
1264 | } | |
4aa0d037 | 1265 | frame_free(gspca_dev); |
4aa0d037 | 1266 | } |
d43fa32f | 1267 | file->private_data = NULL; |
5c4fa002 | 1268 | module_put(gspca_dev->module); |
63eb9546 | 1269 | mutex_unlock(&gspca_dev->queue_lock); |
6b060ffe | 1270 | |
d43fa32f | 1271 | PDEBUG(D_STREAM, "close done"); |
6b060ffe | 1272 | |
63eb9546 JFM |
1273 | return 0; |
1274 | } | |
1275 | ||
1276 | static int vidioc_querycap(struct file *file, void *priv, | |
1277 | struct v4l2_capability *cap) | |
1278 | { | |
1279 | struct gspca_dev *gspca_dev = priv; | |
090264e5 | 1280 | int ret; |
63eb9546 | 1281 | |
090264e5 JFM |
1282 | /* protect the access to the usb device */ |
1283 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1284 | return -ERESTARTSYS; | |
1285 | if (!gspca_dev->present) { | |
1286 | ret = -ENODEV; | |
1287 | goto out; | |
1288 | } | |
e7d712cc | 1289 | strlcpy((char *) cap->driver, gspca_dev->sd_desc->name, |
d8518590 | 1290 | sizeof cap->driver); |
c6edaf16 | 1291 | if (gspca_dev->dev->product != NULL) { |
e7d712cc | 1292 | strlcpy((char *) cap->card, gspca_dev->dev->product, |
c6edaf16 JFM |
1293 | sizeof cap->card); |
1294 | } else { | |
d8518590 | 1295 | snprintf((char *) cap->card, sizeof cap->card, |
c6edaf16 JFM |
1296 | "USB Camera (%04x:%04x)", |
1297 | le16_to_cpu(gspca_dev->dev->descriptor.idVendor), | |
1298 | le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); | |
1299 | } | |
d8518590 JFM |
1300 | usb_make_path(gspca_dev->dev, (char *) cap->bus_info, |
1301 | sizeof(cap->bus_info)); | |
63eb9546 JFM |
1302 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
1303 | | V4L2_CAP_STREAMING | |
1304 | | V4L2_CAP_READWRITE; | |
090264e5 JFM |
1305 | ret = 0; |
1306 | out: | |
1307 | mutex_unlock(&gspca_dev->usb_lock); | |
1308 | return ret; | |
63eb9546 JFM |
1309 | } |
1310 | ||
6a33091f | 1311 | static int get_ctrl(struct gspca_dev *gspca_dev, |
a0001a28 HG |
1312 | int id) |
1313 | { | |
1314 | const struct ctrl *ctrls; | |
1315 | int i; | |
1316 | ||
1317 | for (i = 0, ctrls = gspca_dev->sd_desc->ctrls; | |
1318 | i < gspca_dev->sd_desc->nctrls; | |
1319 | i++, ctrls++) { | |
1320 | if (gspca_dev->ctrl_dis & (1 << i)) | |
1321 | continue; | |
1322 | if (id == ctrls->qctrl.id) | |
6a33091f | 1323 | return i; |
a0001a28 | 1324 | } |
6a33091f | 1325 | return -1; |
a0001a28 HG |
1326 | } |
1327 | ||
63eb9546 JFM |
1328 | static int vidioc_queryctrl(struct file *file, void *priv, |
1329 | struct v4l2_queryctrl *q_ctrl) | |
1330 | { | |
1331 | struct gspca_dev *gspca_dev = priv; | |
a0001a28 | 1332 | const struct ctrl *ctrls; |
6a33091f JFM |
1333 | struct gspca_ctrl *gspca_ctrl; |
1334 | int i, idx; | |
6a7eba24 JFM |
1335 | u32 id; |
1336 | ||
1337 | id = q_ctrl->id; | |
1338 | if (id & V4L2_CTRL_FLAG_NEXT_CTRL) { | |
1339 | id &= V4L2_CTRL_ID_MASK; | |
1340 | id++; | |
6a33091f | 1341 | idx = -1; |
6a7eba24 | 1342 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { |
a0001a28 | 1343 | if (gspca_dev->ctrl_dis & (1 << i)) |
f50ba1be | 1344 | continue; |
b8bfb5fb | 1345 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id) |
f50ba1be | 1346 | continue; |
6a33091f JFM |
1347 | if (idx >= 0 |
1348 | && gspca_dev->sd_desc->ctrls[i].qctrl.id | |
780e3121 | 1349 | > gspca_dev->sd_desc->ctrls[idx].qctrl.id) |
b8bfb5fb | 1350 | continue; |
6a33091f | 1351 | idx = i; |
63eb9546 | 1352 | } |
a0001a28 | 1353 | } else { |
6a33091f | 1354 | idx = get_ctrl(gspca_dev, id); |
63eb9546 | 1355 | } |
6a33091f JFM |
1356 | if (idx < 0) |
1357 | return -EINVAL; | |
1358 | ctrls = &gspca_dev->sd_desc->ctrls[idx]; | |
1359 | memcpy(q_ctrl, &ctrls->qctrl, sizeof *q_ctrl); | |
1360 | if (gspca_dev->cam.ctrls != NULL) { | |
1361 | gspca_ctrl = &gspca_dev->cam.ctrls[idx]; | |
1362 | q_ctrl->default_value = gspca_ctrl->def; | |
1363 | q_ctrl->minimum = gspca_ctrl->min; | |
1364 | q_ctrl->maximum = gspca_ctrl->max; | |
1365 | } | |
1366 | if (gspca_dev->ctrl_inac & (1 << idx)) | |
4af85668 | 1367 | q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE; |
f50ba1be | 1368 | return 0; |
63eb9546 JFM |
1369 | } |
1370 | ||
1371 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
1372 | struct v4l2_control *ctrl) | |
1373 | { | |
1374 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 1375 | const struct ctrl *ctrls; |
6a33091f JFM |
1376 | struct gspca_ctrl *gspca_ctrl; |
1377 | int idx, ret; | |
63eb9546 | 1378 | |
6a33091f JFM |
1379 | idx = get_ctrl(gspca_dev, ctrl->id); |
1380 | if (idx < 0) | |
a0001a28 | 1381 | return -EINVAL; |
6a33091f JFM |
1382 | if (gspca_dev->ctrl_inac & (1 << idx)) |
1383 | return -EINVAL; | |
1384 | ctrls = &gspca_dev->sd_desc->ctrls[idx]; | |
1385 | if (gspca_dev->cam.ctrls != NULL) { | |
1386 | gspca_ctrl = &gspca_dev->cam.ctrls[idx]; | |
1387 | if (ctrl->value < gspca_ctrl->min | |
1388 | || ctrl->value > gspca_ctrl->max) | |
1389 | return -ERANGE; | |
1390 | } else { | |
1391 | gspca_ctrl = NULL; | |
1392 | if (ctrl->value < ctrls->qctrl.minimum | |
1393 | || ctrl->value > ctrls->qctrl.maximum) | |
1394 | return -ERANGE; | |
1395 | } | |
a0001a28 HG |
1396 | PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value); |
1397 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1398 | return -ERESTARTSYS; | |
6a33091f JFM |
1399 | if (!gspca_dev->present) { |
1400 | ret = -ENODEV; | |
1401 | goto out; | |
1402 | } | |
8c4ebae4 | 1403 | gspca_dev->usb_err = 0; |
6a33091f | 1404 | if (ctrls->set != NULL) { |
a0001a28 | 1405 | ret = ctrls->set(gspca_dev, ctrl->value); |
6a33091f JFM |
1406 | goto out; |
1407 | } | |
1408 | if (gspca_ctrl != NULL) { | |
1409 | gspca_ctrl->val = ctrl->value; | |
1410 | if (ctrls->set_control != NULL | |
1411 | && gspca_dev->streaming) | |
1412 | ctrls->set_control(gspca_dev); | |
1413 | } | |
1414 | ret = gspca_dev->usb_err; | |
1415 | out: | |
a0001a28 HG |
1416 | mutex_unlock(&gspca_dev->usb_lock); |
1417 | return ret; | |
63eb9546 JFM |
1418 | } |
1419 | ||
1420 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
1421 | struct v4l2_control *ctrl) | |
1422 | { | |
1423 | struct gspca_dev *gspca_dev = priv; | |
a5ae2062 | 1424 | const struct ctrl *ctrls; |
6a33091f | 1425 | int idx, ret; |
63eb9546 | 1426 | |
6a33091f JFM |
1427 | idx = get_ctrl(gspca_dev, ctrl->id); |
1428 | if (idx < 0) | |
a0001a28 | 1429 | return -EINVAL; |
6a33091f | 1430 | ctrls = &gspca_dev->sd_desc->ctrls[idx]; |
a0001a28 HG |
1431 | |
1432 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1433 | return -ERESTARTSYS; | |
6a33091f JFM |
1434 | if (!gspca_dev->present) { |
1435 | ret = -ENODEV; | |
1436 | goto out; | |
1437 | } | |
8c4ebae4 | 1438 | gspca_dev->usb_err = 0; |
6a33091f | 1439 | if (ctrls->get != NULL) { |
a0001a28 | 1440 | ret = ctrls->get(gspca_dev, &ctrl->value); |
6a33091f JFM |
1441 | goto out; |
1442 | } | |
1443 | if (gspca_dev->cam.ctrls != NULL) | |
1444 | ctrl->value = gspca_dev->cam.ctrls[idx].val; | |
1445 | ret = 0; | |
1446 | out: | |
a0001a28 HG |
1447 | mutex_unlock(&gspca_dev->usb_lock); |
1448 | return ret; | |
63eb9546 JFM |
1449 | } |
1450 | ||
1451 | static int vidioc_querymenu(struct file *file, void *priv, | |
1452 | struct v4l2_querymenu *qmenu) | |
1453 | { | |
1454 | struct gspca_dev *gspca_dev = priv; | |
1455 | ||
1456 | if (!gspca_dev->sd_desc->querymenu) | |
1457 | return -EINVAL; | |
1458 | return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu); | |
1459 | } | |
1460 | ||
1461 | static int vidioc_enum_input(struct file *file, void *priv, | |
1462 | struct v4l2_input *input) | |
1463 | { | |
1464 | struct gspca_dev *gspca_dev = priv; | |
1465 | ||
1466 | if (input->index != 0) | |
1467 | return -EINVAL; | |
63eb9546 | 1468 | input->type = V4L2_INPUT_TYPE_CAMERA; |
dfa76fa2 | 1469 | input->status = gspca_dev->cam.input_flags; |
e7d712cc | 1470 | strlcpy(input->name, gspca_dev->sd_desc->name, |
63eb9546 JFM |
1471 | sizeof input->name); |
1472 | return 0; | |
1473 | } | |
1474 | ||
1475 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) | |
1476 | { | |
1477 | *i = 0; | |
1478 | return 0; | |
1479 | } | |
1480 | ||
1481 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) | |
1482 | { | |
1483 | if (i > 0) | |
1484 | return -EINVAL; | |
1485 | return (0); | |
1486 | } | |
1487 | ||
1488 | static int vidioc_reqbufs(struct file *file, void *priv, | |
1489 | struct v4l2_requestbuffers *rb) | |
1490 | { | |
1491 | struct gspca_dev *gspca_dev = priv; | |
832d0a91 | 1492 | int i, ret = 0, streaming; |
63eb9546 | 1493 | |
a2ba6f27 JFM |
1494 | i = rb->memory; /* (avoid compilation warning) */ |
1495 | switch (i) { | |
5b77ae77 | 1496 | case GSPCA_MEMORY_READ: /* (internal call) */ |
d43fa32f | 1497 | case V4L2_MEMORY_MMAP: |
d43fa32f | 1498 | case V4L2_MEMORY_USERPTR: |
6a7eba24 | 1499 | break; |
d43fa32f | 1500 | default: |
63eb9546 | 1501 | return -EINVAL; |
d43fa32f | 1502 | } |
e2997a72 HG |
1503 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1504 | return -ERESTARTSYS; | |
d43fa32f | 1505 | |
5b77ae77 | 1506 | if (gspca_dev->memory != GSPCA_MEMORY_NO |
ce5610bc | 1507 | && gspca_dev->memory != GSPCA_MEMORY_READ |
5b77ae77 | 1508 | && gspca_dev->memory != rb->memory) { |
4aa0d037 JFM |
1509 | ret = -EBUSY; |
1510 | goto out; | |
1511 | } | |
d43fa32f | 1512 | |
5b77ae77 JFM |
1513 | /* only one file may do the capture */ |
1514 | if (gspca_dev->capt_file != NULL | |
1515 | && gspca_dev->capt_file != file) { | |
1516 | ret = -EBUSY; | |
1517 | goto out; | |
1518 | } | |
1519 | ||
1520 | /* if allocated, the buffers must not be mapped */ | |
1521 | for (i = 0; i < gspca_dev->nframes; i++) { | |
1522 | if (gspca_dev->frame[i].vma_use_count) { | |
ac0d6df6 JFM |
1523 | ret = -EBUSY; |
1524 | goto out; | |
1525 | } | |
5b77ae77 JFM |
1526 | } |
1527 | ||
1528 | /* stop streaming */ | |
832d0a91 JFM |
1529 | streaming = gspca_dev->streaming; |
1530 | if (streaming) { | |
5b77ae77 | 1531 | mutex_lock(&gspca_dev->usb_lock); |
8c4ebae4 | 1532 | gspca_dev->usb_err = 0; |
5b77ae77 JFM |
1533 | gspca_stream_off(gspca_dev); |
1534 | mutex_unlock(&gspca_dev->usb_lock); | |
59929cef JFM |
1535 | |
1536 | /* Don't restart the stream when switching from read | |
1537 | * to mmap mode */ | |
1538 | if (gspca_dev->memory == GSPCA_MEMORY_READ) | |
1539 | streaming = 0; | |
5b77ae77 JFM |
1540 | } |
1541 | ||
1542 | /* free the previous allocated buffers, if any */ | |
d642de2e | 1543 | if (gspca_dev->nframes != 0) |
5b77ae77 | 1544 | frame_free(gspca_dev); |
5b77ae77 JFM |
1545 | if (rb->count == 0) /* unrequest */ |
1546 | goto out; | |
d642de2e | 1547 | ret = frame_alloc(gspca_dev, file, rb->memory, rb->count); |
5b77ae77 JFM |
1548 | if (ret == 0) { |
1549 | rb->count = gspca_dev->nframes; | |
832d0a91 JFM |
1550 | if (streaming) |
1551 | ret = gspca_init_transfer(gspca_dev); | |
4aa0d037 JFM |
1552 | } |
1553 | out: | |
63eb9546 JFM |
1554 | mutex_unlock(&gspca_dev->queue_lock); |
1555 | PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count); | |
1556 | return ret; | |
1557 | } | |
1558 | ||
1559 | static int vidioc_querybuf(struct file *file, void *priv, | |
1560 | struct v4l2_buffer *v4l2_buf) | |
1561 | { | |
1562 | struct gspca_dev *gspca_dev = priv; | |
1563 | struct gspca_frame *frame; | |
1564 | ||
13752bd9 | 1565 | if (v4l2_buf->index < 0 |
63eb9546 JFM |
1566 | || v4l2_buf->index >= gspca_dev->nframes) |
1567 | return -EINVAL; | |
1568 | ||
1569 | frame = &gspca_dev->frame[v4l2_buf->index]; | |
1570 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1571 | return 0; | |
1572 | } | |
1573 | ||
1574 | static int vidioc_streamon(struct file *file, void *priv, | |
1575 | enum v4l2_buf_type buf_type) | |
1576 | { | |
1577 | struct gspca_dev *gspca_dev = priv; | |
1578 | int ret; | |
1579 | ||
63eb9546 JFM |
1580 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1581 | return -EINVAL; | |
e2997a72 HG |
1582 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1583 | return -ERESTARTSYS; | |
090264e5 | 1584 | |
18bf99aa JFM |
1585 | /* check the capture file */ |
1586 | if (gspca_dev->capt_file != file) { | |
1587 | ret = -EBUSY; | |
1588 | goto out; | |
1589 | } | |
1590 | ||
1edabe71 JFM |
1591 | if (gspca_dev->nframes == 0 |
1592 | || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) { | |
63eb9546 JFM |
1593 | ret = -EINVAL; |
1594 | goto out; | |
1595 | } | |
1596 | if (!gspca_dev->streaming) { | |
1597 | ret = gspca_init_transfer(gspca_dev); | |
1598 | if (ret < 0) | |
1599 | goto out; | |
1600 | } | |
335b3f88 | 1601 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
1602 | if (gspca_debug & D_STREAM) { |
1603 | PDEBUG_MODE("stream on OK", | |
1604 | gspca_dev->pixfmt, | |
1605 | gspca_dev->width, | |
1606 | gspca_dev->height); | |
1607 | } | |
1608 | #endif | |
e2997a72 | 1609 | ret = 0; |
63eb9546 JFM |
1610 | out: |
1611 | mutex_unlock(&gspca_dev->queue_lock); | |
1612 | return ret; | |
1613 | } | |
1614 | ||
1615 | static int vidioc_streamoff(struct file *file, void *priv, | |
1616 | enum v4l2_buf_type buf_type) | |
1617 | { | |
1618 | struct gspca_dev *gspca_dev = priv; | |
f7059eaa | 1619 | int ret; |
63eb9546 | 1620 | |
63eb9546 JFM |
1621 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1622 | return -EINVAL; | |
4e770f76 | 1623 | |
4aa0d037 JFM |
1624 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1625 | return -ERESTARTSYS; | |
5b77ae77 | 1626 | |
4e770f76 HG |
1627 | if (!gspca_dev->streaming) { |
1628 | ret = 0; | |
1629 | goto out; | |
1630 | } | |
1631 | ||
18bf99aa JFM |
1632 | /* check the capture file */ |
1633 | if (gspca_dev->capt_file != file) { | |
1634 | ret = -EBUSY; | |
1635 | goto out; | |
1636 | } | |
1637 | ||
5b77ae77 | 1638 | /* stop streaming */ |
4aa0d037 JFM |
1639 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { |
1640 | ret = -ERESTARTSYS; | |
1641 | goto out; | |
63eb9546 | 1642 | } |
8c4ebae4 | 1643 | gspca_dev->usb_err = 0; |
4aa0d037 | 1644 | gspca_stream_off(gspca_dev); |
4aa0d037 | 1645 | mutex_unlock(&gspca_dev->usb_lock); |
0d0ae15d HG |
1646 | /* In case another thread is waiting in dqbuf */ |
1647 | wake_up_interruptible(&gspca_dev->wq); | |
5b77ae77 | 1648 | |
f7059eaa JFM |
1649 | /* empty the transfer queues */ |
1650 | atomic_set(&gspca_dev->fr_q, 0); | |
1651 | atomic_set(&gspca_dev->fr_i, 0); | |
1652 | gspca_dev->fr_o = 0; | |
5b77ae77 | 1653 | ret = 0; |
4aa0d037 JFM |
1654 | out: |
1655 | mutex_unlock(&gspca_dev->queue_lock); | |
1656 | return ret; | |
63eb9546 JFM |
1657 | } |
1658 | ||
1659 | static int vidioc_g_jpegcomp(struct file *file, void *priv, | |
1660 | struct v4l2_jpegcompression *jpegcomp) | |
1661 | { | |
1662 | struct gspca_dev *gspca_dev = priv; | |
1663 | int ret; | |
1664 | ||
1665 | if (!gspca_dev->sd_desc->get_jcomp) | |
1666 | return -EINVAL; | |
e2997a72 HG |
1667 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1668 | return -ERESTARTSYS; | |
8c4ebae4 | 1669 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1670 | if (gspca_dev->present) |
1671 | ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); | |
1672 | else | |
1673 | ret = -ENODEV; | |
63eb9546 JFM |
1674 | mutex_unlock(&gspca_dev->usb_lock); |
1675 | return ret; | |
1676 | } | |
1677 | ||
1678 | static int vidioc_s_jpegcomp(struct file *file, void *priv, | |
1679 | struct v4l2_jpegcompression *jpegcomp) | |
1680 | { | |
1681 | struct gspca_dev *gspca_dev = priv; | |
1682 | int ret; | |
1683 | ||
63eb9546 JFM |
1684 | if (!gspca_dev->sd_desc->set_jcomp) |
1685 | return -EINVAL; | |
f86d4a91 JP |
1686 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) |
1687 | return -ERESTARTSYS; | |
8c4ebae4 | 1688 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1689 | if (gspca_dev->present) |
1690 | ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); | |
1691 | else | |
1692 | ret = -ENODEV; | |
63eb9546 JFM |
1693 | mutex_unlock(&gspca_dev->usb_lock); |
1694 | return ret; | |
1695 | } | |
1696 | ||
1697 | static int vidioc_g_parm(struct file *filp, void *priv, | |
1698 | struct v4l2_streamparm *parm) | |
1699 | { | |
1700 | struct gspca_dev *gspca_dev = priv; | |
1701 | ||
63eb9546 | 1702 | parm->parm.capture.readbuffers = gspca_dev->nbufread; |
627a5ef7 JP |
1703 | |
1704 | if (gspca_dev->sd_desc->get_streamparm) { | |
1705 | int ret; | |
1706 | ||
1707 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1708 | return -ERESTARTSYS; | |
668f44a6 JFM |
1709 | if (gspca_dev->present) { |
1710 | gspca_dev->usb_err = 0; | |
1711 | gspca_dev->sd_desc->get_streamparm(gspca_dev, parm); | |
1712 | ret = gspca_dev->usb_err; | |
1713 | } else { | |
090264e5 | 1714 | ret = -ENODEV; |
668f44a6 | 1715 | } |
627a5ef7 JP |
1716 | mutex_unlock(&gspca_dev->usb_lock); |
1717 | return ret; | |
1718 | } | |
1719 | ||
63eb9546 JFM |
1720 | return 0; |
1721 | } | |
1722 | ||
1723 | static int vidioc_s_parm(struct file *filp, void *priv, | |
1724 | struct v4l2_streamparm *parm) | |
1725 | { | |
1726 | struct gspca_dev *gspca_dev = priv; | |
1727 | int n; | |
1728 | ||
63eb9546 | 1729 | n = parm->parm.capture.readbuffers; |
f7059eaa | 1730 | if (n == 0 || n >= GSPCA_MAX_FRAMES) |
63eb9546 JFM |
1731 | parm->parm.capture.readbuffers = gspca_dev->nbufread; |
1732 | else | |
1733 | gspca_dev->nbufread = n; | |
627a5ef7 JP |
1734 | |
1735 | if (gspca_dev->sd_desc->set_streamparm) { | |
1736 | int ret; | |
1737 | ||
1738 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1739 | return -ERESTARTSYS; | |
668f44a6 JFM |
1740 | if (gspca_dev->present) { |
1741 | gspca_dev->usb_err = 0; | |
1742 | gspca_dev->sd_desc->set_streamparm(gspca_dev, parm); | |
1743 | ret = gspca_dev->usb_err; | |
1744 | } else { | |
090264e5 | 1745 | ret = -ENODEV; |
668f44a6 | 1746 | } |
627a5ef7 JP |
1747 | mutex_unlock(&gspca_dev->usb_lock); |
1748 | return ret; | |
1749 | } | |
1750 | ||
63eb9546 JFM |
1751 | return 0; |
1752 | } | |
1753 | ||
63eb9546 JFM |
1754 | static int dev_mmap(struct file *file, struct vm_area_struct *vma) |
1755 | { | |
1756 | struct gspca_dev *gspca_dev = file->private_data; | |
efab8211 | 1757 | struct gspca_frame *frame; |
63eb9546 JFM |
1758 | struct page *page; |
1759 | unsigned long addr, start, size; | |
1760 | int i, ret; | |
63eb9546 JFM |
1761 | |
1762 | start = vma->vm_start; | |
1763 | size = vma->vm_end - vma->vm_start; | |
1764 | PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size); | |
1765 | ||
e2997a72 HG |
1766 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1767 | return -ERESTARTSYS; | |
63eb9546 JFM |
1768 | if (!gspca_dev->present) { |
1769 | ret = -ENODEV; | |
4aa0d037 JFM |
1770 | goto out; |
1771 | } | |
1772 | if (gspca_dev->capt_file != file) { | |
1773 | ret = -EINVAL; | |
1774 | goto out; | |
63eb9546 JFM |
1775 | } |
1776 | ||
efab8211 | 1777 | frame = NULL; |
63eb9546 JFM |
1778 | for (i = 0; i < gspca_dev->nframes; ++i) { |
1779 | if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) { | |
1780 | PDEBUG(D_STREAM, "mmap bad memory type"); | |
1781 | break; | |
1782 | } | |
1783 | if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT) | |
1784 | == vma->vm_pgoff) { | |
1785 | frame = &gspca_dev->frame[i]; | |
1786 | break; | |
1787 | } | |
1788 | } | |
efab8211 | 1789 | if (frame == NULL) { |
63eb9546 JFM |
1790 | PDEBUG(D_STREAM, "mmap no frame buffer found"); |
1791 | ret = -EINVAL; | |
4aa0d037 | 1792 | goto out; |
63eb9546 | 1793 | } |
38bff697 | 1794 | if (size != frame->v4l2_buf.length) { |
63eb9546 JFM |
1795 | PDEBUG(D_STREAM, "mmap bad size"); |
1796 | ret = -EINVAL; | |
4aa0d037 | 1797 | goto out; |
63eb9546 JFM |
1798 | } |
1799 | ||
1800 | /* | |
1801 | * - VM_IO marks the area as being a mmaped region for I/O to a | |
1802 | * device. It also prevents the region from being core dumped. | |
1803 | */ | |
1804 | vma->vm_flags |= VM_IO; | |
1805 | ||
1806 | addr = (unsigned long) frame->data; | |
1807 | while (size > 0) { | |
1808 | page = vmalloc_to_page((void *) addr); | |
1809 | ret = vm_insert_page(vma, start, page); | |
1810 | if (ret < 0) | |
4aa0d037 | 1811 | goto out; |
63eb9546 JFM |
1812 | start += PAGE_SIZE; |
1813 | addr += PAGE_SIZE; | |
1814 | size -= PAGE_SIZE; | |
1815 | } | |
1816 | ||
d50e257e | 1817 | vma->vm_ops = &gspca_vm_ops; |
63eb9546 JFM |
1818 | vma->vm_private_data = frame; |
1819 | gspca_vm_open(vma); | |
e2997a72 | 1820 | ret = 0; |
4aa0d037 | 1821 | out: |
63eb9546 JFM |
1822 | mutex_unlock(&gspca_dev->queue_lock); |
1823 | return ret; | |
1824 | } | |
1825 | ||
27074efa HG |
1826 | static int frame_ready_nolock(struct gspca_dev *gspca_dev, struct file *file, |
1827 | enum v4l2_memory memory) | |
1828 | { | |
1829 | if (!gspca_dev->present) | |
1830 | return -ENODEV; | |
1831 | if (gspca_dev->capt_file != file || gspca_dev->memory != memory || | |
1832 | !gspca_dev->streaming) | |
1833 | return -EINVAL; | |
1834 | ||
1835 | /* check if a frame is ready */ | |
1836 | return gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i); | |
1837 | } | |
1838 | ||
1839 | static int frame_ready(struct gspca_dev *gspca_dev, struct file *file, | |
1840 | enum v4l2_memory memory) | |
1841 | { | |
1842 | int ret; | |
1843 | ||
1844 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1845 | return -ERESTARTSYS; | |
1846 | ret = frame_ready_nolock(gspca_dev, file, memory); | |
1847 | mutex_unlock(&gspca_dev->queue_lock); | |
1848 | return ret; | |
1849 | } | |
1850 | ||
63eb9546 | 1851 | /* |
27074efa | 1852 | * dequeue a video buffer |
63eb9546 | 1853 | * |
27074efa | 1854 | * If nonblock_ing is false, block until a buffer is available. |
63eb9546 | 1855 | */ |
27074efa HG |
1856 | static int vidioc_dqbuf(struct file *file, void *priv, |
1857 | struct v4l2_buffer *v4l2_buf) | |
63eb9546 | 1858 | { |
27074efa HG |
1859 | struct gspca_dev *gspca_dev = priv; |
1860 | struct gspca_frame *frame; | |
1861 | int i, j, ret; | |
63eb9546 | 1862 | |
27074efa HG |
1863 | PDEBUG(D_FRAM, "dqbuf"); |
1864 | ||
1865 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1866 | return -ERESTARTSYS; | |
1867 | ||
1868 | for (;;) { | |
1869 | ret = frame_ready_nolock(gspca_dev, file, v4l2_buf->memory); | |
1870 | if (ret < 0) | |
1871 | goto out; | |
1872 | if (ret > 0) | |
1873 | break; | |
1874 | ||
1875 | mutex_unlock(&gspca_dev->queue_lock); | |
1876 | ||
1877 | if (file->f_flags & O_NONBLOCK) | |
181b704f HG |
1878 | return -EAGAIN; |
1879 | ||
1880 | /* wait till a frame is ready */ | |
4aa0d037 | 1881 | ret = wait_event_interruptible_timeout(gspca_dev->wq, |
27074efa | 1882 | frame_ready(gspca_dev, file, v4l2_buf->memory), |
181b704f HG |
1883 | msecs_to_jiffies(3000)); |
1884 | if (ret < 0) | |
1885 | return ret; | |
27074efa | 1886 | if (ret == 0) |
e2997a72 | 1887 | return -EIO; |
27074efa HG |
1888 | |
1889 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1890 | return -ERESTARTSYS; | |
63eb9546 | 1891 | } |
181b704f | 1892 | |
27074efa HG |
1893 | i = gspca_dev->fr_o; |
1894 | j = gspca_dev->fr_queue[i]; | |
1895 | frame = &gspca_dev->frame[j]; | |
1896 | ||
f7059eaa | 1897 | gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES; |
e2997a72 | 1898 | |
739570bb JFM |
1899 | if (gspca_dev->sd_desc->dq_callback) { |
1900 | mutex_lock(&gspca_dev->usb_lock); | |
8c4ebae4 | 1901 | gspca_dev->usb_err = 0; |
090264e5 JFM |
1902 | if (gspca_dev->present) |
1903 | gspca_dev->sd_desc->dq_callback(gspca_dev); | |
739570bb JFM |
1904 | mutex_unlock(&gspca_dev->usb_lock); |
1905 | } | |
5b77ae77 | 1906 | |
4a82bc60 HG |
1907 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; |
1908 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1909 | PDEBUG(D_FRAM, "dqbuf %d", j); | |
1910 | ret = 0; | |
1911 | ||
ac0d6df6 | 1912 | if (gspca_dev->memory == V4L2_MEMORY_USERPTR) { |
c6eb8eaf | 1913 | if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr, |
ac0d6df6 JFM |
1914 | frame->data, |
1915 | frame->v4l2_buf.bytesused)) { | |
1916 | PDEBUG(D_ERR|D_STREAM, | |
1917 | "dqbuf cp to user failed"); | |
1918 | ret = -EFAULT; | |
ac0d6df6 JFM |
1919 | } |
1920 | } | |
4aa0d037 | 1921 | out: |
27074efa | 1922 | mutex_unlock(&gspca_dev->queue_lock); |
63eb9546 JFM |
1923 | return ret; |
1924 | } | |
1925 | ||
1926 | /* | |
1927 | * queue a video buffer | |
1928 | * | |
1929 | * Attempting to queue a buffer that has already been | |
1930 | * queued will return -EINVAL. | |
1931 | */ | |
1932 | static int vidioc_qbuf(struct file *file, void *priv, | |
1933 | struct v4l2_buffer *v4l2_buf) | |
1934 | { | |
1935 | struct gspca_dev *gspca_dev = priv; | |
1936 | struct gspca_frame *frame; | |
1937 | int i, index, ret; | |
1938 | ||
1939 | PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index); | |
63eb9546 | 1940 | |
5b77ae77 JFM |
1941 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1942 | return -ERESTARTSYS; | |
1943 | ||
63eb9546 JFM |
1944 | index = v4l2_buf->index; |
1945 | if ((unsigned) index >= gspca_dev->nframes) { | |
d43fa32f | 1946 | PDEBUG(D_FRAM, |
63eb9546 | 1947 | "qbuf idx %d >= %d", index, gspca_dev->nframes); |
5b77ae77 JFM |
1948 | ret = -EINVAL; |
1949 | goto out; | |
63eb9546 | 1950 | } |
5b77ae77 | 1951 | if (v4l2_buf->memory != gspca_dev->memory) { |
d43fa32f | 1952 | PDEBUG(D_FRAM, "qbuf bad memory type"); |
5b77ae77 JFM |
1953 | ret = -EINVAL; |
1954 | goto out; | |
63eb9546 | 1955 | } |
e2997a72 | 1956 | |
5b77ae77 | 1957 | frame = &gspca_dev->frame[index]; |
d43fa32f JFM |
1958 | if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) { |
1959 | PDEBUG(D_FRAM, "qbuf bad state"); | |
63eb9546 JFM |
1960 | ret = -EINVAL; |
1961 | goto out; | |
1962 | } | |
1963 | ||
1964 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED; | |
63eb9546 | 1965 | |
d43fa32f | 1966 | if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) { |
63eb9546 JFM |
1967 | frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr; |
1968 | frame->v4l2_buf.length = v4l2_buf->length; | |
1969 | } | |
1970 | ||
1971 | /* put the buffer in the 'queued' queue */ | |
f7059eaa | 1972 | i = atomic_read(&gspca_dev->fr_q); |
63eb9546 | 1973 | gspca_dev->fr_queue[i] = index; |
f7059eaa | 1974 | atomic_set(&gspca_dev->fr_q, (i + 1) % GSPCA_MAX_FRAMES); |
63eb9546 JFM |
1975 | |
1976 | v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED; | |
1977 | v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE; | |
1978 | ret = 0; | |
1979 | out: | |
1980 | mutex_unlock(&gspca_dev->queue_lock); | |
1981 | return ret; | |
1982 | } | |
1983 | ||
d43fa32f JFM |
1984 | /* |
1985 | * allocate the resources for read() | |
1986 | */ | |
1987 | static int read_alloc(struct gspca_dev *gspca_dev, | |
1988 | struct file *file) | |
63eb9546 | 1989 | { |
63eb9546 | 1990 | struct v4l2_buffer v4l2_buf; |
d43fa32f | 1991 | int i, ret; |
63eb9546 | 1992 | |
d43fa32f | 1993 | PDEBUG(D_STREAM, "read alloc"); |
63eb9546 JFM |
1994 | if (gspca_dev->nframes == 0) { |
1995 | struct v4l2_requestbuffers rb; | |
1996 | ||
1997 | memset(&rb, 0, sizeof rb); | |
1998 | rb.count = gspca_dev->nbufread; | |
1999 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 2000 | rb.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
2001 | ret = vidioc_reqbufs(file, gspca_dev, &rb); |
2002 | if (ret != 0) { | |
d43fa32f | 2003 | PDEBUG(D_STREAM, "read reqbuf err %d", ret); |
63eb9546 JFM |
2004 | return ret; |
2005 | } | |
2006 | memset(&v4l2_buf, 0, sizeof v4l2_buf); | |
2007 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 2008 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
2009 | for (i = 0; i < gspca_dev->nbufread; i++) { |
2010 | v4l2_buf.index = i; | |
63eb9546 JFM |
2011 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); |
2012 | if (ret != 0) { | |
2013 | PDEBUG(D_STREAM, "read qbuf err: %d", ret); | |
2014 | return ret; | |
2015 | } | |
2016 | } | |
d43fa32f JFM |
2017 | gspca_dev->memory = GSPCA_MEMORY_READ; |
2018 | } | |
4aa0d037 | 2019 | |
d43fa32f JFM |
2020 | /* start streaming */ |
2021 | ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE); | |
2022 | if (ret != 0) | |
2023 | PDEBUG(D_STREAM, "read streamon err %d", ret); | |
2024 | return ret; | |
2025 | } | |
2026 | ||
2027 | static unsigned int dev_poll(struct file *file, poll_table *wait) | |
2028 | { | |
2029 | struct gspca_dev *gspca_dev = file->private_data; | |
f7059eaa | 2030 | int ret; |
d43fa32f JFM |
2031 | |
2032 | PDEBUG(D_FRAM, "poll"); | |
2033 | ||
2034 | poll_wait(file, &gspca_dev->wq, wait); | |
d43fa32f | 2035 | |
5b77ae77 | 2036 | /* if reqbufs is not done, the user would use read() */ |
ee362991 | 2037 | if (gspca_dev->memory == GSPCA_MEMORY_NO) { |
d43fa32f | 2038 | ret = read_alloc(gspca_dev, file); |
5b77ae77 JFM |
2039 | if (ret != 0) |
2040 | return POLLERR; | |
63eb9546 JFM |
2041 | } |
2042 | ||
d43fa32f JFM |
2043 | if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) |
2044 | return POLLERR; | |
d43fa32f | 2045 | |
f7059eaa JFM |
2046 | /* check if an image has been received */ |
2047 | if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i)) | |
2048 | ret = POLLIN | POLLRDNORM; /* yes */ | |
d43fa32f JFM |
2049 | else |
2050 | ret = 0; | |
d43fa32f | 2051 | mutex_unlock(&gspca_dev->queue_lock); |
090264e5 JFM |
2052 | if (!gspca_dev->present) |
2053 | return POLLHUP; | |
d43fa32f JFM |
2054 | return ret; |
2055 | } | |
2056 | ||
2057 | static ssize_t dev_read(struct file *file, char __user *data, | |
2058 | size_t count, loff_t *ppos) | |
2059 | { | |
2060 | struct gspca_dev *gspca_dev = file->private_data; | |
2061 | struct gspca_frame *frame; | |
2062 | struct v4l2_buffer v4l2_buf; | |
2063 | struct timeval timestamp; | |
82643d0e | 2064 | int n, ret, ret2; |
d43fa32f | 2065 | |
a9e11134 | 2066 | PDEBUG(D_FRAM, "read (%zd)", count); |
d43fa32f JFM |
2067 | if (!gspca_dev->present) |
2068 | return -ENODEV; | |
ee362991 | 2069 | if (gspca_dev->memory == GSPCA_MEMORY_NO) { /* first time ? */ |
d43fa32f JFM |
2070 | ret = read_alloc(gspca_dev, file); |
2071 | if (ret != 0) | |
2072 | return ret; | |
d43fa32f JFM |
2073 | } |
2074 | ||
63eb9546 | 2075 | /* get a frame */ |
2f51d00f | 2076 | timestamp = ktime_to_timeval(ktime_get()); |
63eb9546 | 2077 | timestamp.tv_sec--; |
82643d0e JFM |
2078 | n = 2; |
2079 | for (;;) { | |
63eb9546 JFM |
2080 | memset(&v4l2_buf, 0, sizeof v4l2_buf); |
2081 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 2082 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
2083 | ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf); |
2084 | if (ret != 0) { | |
2085 | PDEBUG(D_STREAM, "read dqbuf err %d", ret); | |
2086 | return ret; | |
2087 | } | |
2088 | ||
2089 | /* if the process slept for more than 1 second, | |
219423c1 | 2090 | * get a newer frame */ |
63eb9546 | 2091 | frame = &gspca_dev->frame[v4l2_buf.index]; |
82643d0e JFM |
2092 | if (--n < 0) |
2093 | break; /* avoid infinite loop */ | |
63eb9546 JFM |
2094 | if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec) |
2095 | break; | |
2096 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
2097 | if (ret != 0) { | |
2098 | PDEBUG(D_STREAM, "read qbuf err %d", ret); | |
2099 | return ret; | |
2100 | } | |
2101 | } | |
2102 | ||
2103 | /* copy the frame */ | |
ac0d6df6 JFM |
2104 | if (count > frame->v4l2_buf.bytesused) |
2105 | count = frame->v4l2_buf.bytesused; | |
63eb9546 JFM |
2106 | ret = copy_to_user(data, frame->data, count); |
2107 | if (ret != 0) { | |
2108 | PDEBUG(D_ERR|D_STREAM, | |
a9e11134 | 2109 | "read cp to user lack %d / %zd", ret, count); |
63eb9546 JFM |
2110 | ret = -EFAULT; |
2111 | goto out; | |
2112 | } | |
2113 | ret = count; | |
2114 | out: | |
2115 | /* in each case, requeue the buffer */ | |
2116 | ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
2117 | if (ret2 != 0) | |
2118 | return ret2; | |
2119 | return ret; | |
2120 | } | |
2121 | ||
bec43661 | 2122 | static struct v4l2_file_operations dev_fops = { |
63eb9546 JFM |
2123 | .owner = THIS_MODULE, |
2124 | .open = dev_open, | |
2125 | .release = dev_close, | |
2126 | .read = dev_read, | |
2127 | .mmap = dev_mmap, | |
bec43661 | 2128 | .unlocked_ioctl = video_ioctl2, |
63eb9546 JFM |
2129 | .poll = dev_poll, |
2130 | }; | |
2131 | ||
a399810c | 2132 | static const struct v4l2_ioctl_ops dev_ioctl_ops = { |
63eb9546 JFM |
2133 | .vidioc_querycap = vidioc_querycap, |
2134 | .vidioc_dqbuf = vidioc_dqbuf, | |
2135 | .vidioc_qbuf = vidioc_qbuf, | |
e078770a MCC |
2136 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
2137 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
2138 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
2139 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
63eb9546 JFM |
2140 | .vidioc_streamon = vidioc_streamon, |
2141 | .vidioc_queryctrl = vidioc_queryctrl, | |
2142 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
2143 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
2144 | .vidioc_querymenu = vidioc_querymenu, | |
2145 | .vidioc_enum_input = vidioc_enum_input, | |
2146 | .vidioc_g_input = vidioc_g_input, | |
2147 | .vidioc_s_input = vidioc_s_input, | |
2148 | .vidioc_reqbufs = vidioc_reqbufs, | |
2149 | .vidioc_querybuf = vidioc_querybuf, | |
2150 | .vidioc_streamoff = vidioc_streamoff, | |
2151 | .vidioc_g_jpegcomp = vidioc_g_jpegcomp, | |
2152 | .vidioc_s_jpegcomp = vidioc_s_jpegcomp, | |
2153 | .vidioc_g_parm = vidioc_g_parm, | |
2154 | .vidioc_s_parm = vidioc_s_parm, | |
11c635a2 | 2155 | .vidioc_enum_framesizes = vidioc_enum_framesizes, |
28ffe77f | 2156 | .vidioc_enum_frameintervals = vidioc_enum_frameintervals, |
af1d9afa BJ |
2157 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
2158 | .vidioc_g_register = vidioc_g_register, | |
2159 | .vidioc_s_register = vidioc_s_register, | |
2160 | #endif | |
2161 | .vidioc_g_chip_ident = vidioc_g_chip_ident, | |
63eb9546 JFM |
2162 | }; |
2163 | ||
59929cef | 2164 | static const struct video_device gspca_template = { |
a399810c | 2165 | .name = "gspca main driver", |
a399810c HV |
2166 | .fops = &dev_fops, |
2167 | .ioctl_ops = &dev_ioctl_ops, | |
d0182306 | 2168 | .release = gspca_release, |
a399810c HV |
2169 | }; |
2170 | ||
6a33091f JFM |
2171 | /* initialize the controls */ |
2172 | static void ctrls_init(struct gspca_dev *gspca_dev) | |
2173 | { | |
2174 | struct gspca_ctrl *ctrl; | |
2175 | int i; | |
2176 | ||
2177 | for (i = 0, ctrl = gspca_dev->cam.ctrls; | |
2178 | i < gspca_dev->sd_desc->nctrls; | |
2179 | i++, ctrl++) { | |
2180 | ctrl->def = gspca_dev->sd_desc->ctrls[i].qctrl.default_value; | |
2181 | ctrl->val = ctrl->def; | |
2182 | ctrl->min = gspca_dev->sd_desc->ctrls[i].qctrl.minimum; | |
2183 | ctrl->max = gspca_dev->sd_desc->ctrls[i].qctrl.maximum; | |
2184 | } | |
2185 | } | |
2186 | ||
63eb9546 JFM |
2187 | /* |
2188 | * probe and create a new gspca device | |
2189 | * | |
2190 | * This function must be called by the sub-driver when it is | |
2191 | * called for probing a new device. | |
2192 | */ | |
4462864d | 2193 | int gspca_dev_probe2(struct usb_interface *intf, |
63eb9546 JFM |
2194 | const struct usb_device_id *id, |
2195 | const struct sd_desc *sd_desc, | |
d43fa32f JFM |
2196 | int dev_size, |
2197 | struct module *module) | |
63eb9546 | 2198 | { |
63eb9546 JFM |
2199 | struct gspca_dev *gspca_dev; |
2200 | struct usb_device *dev = interface_to_usbdev(intf); | |
2201 | int ret; | |
63eb9546 | 2202 | |
6a7eba24 | 2203 | PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct); |
63eb9546 | 2204 | |
63eb9546 JFM |
2205 | /* create the device */ |
2206 | if (dev_size < sizeof *gspca_dev) | |
2207 | dev_size = sizeof *gspca_dev; | |
2208 | gspca_dev = kzalloc(dev_size, GFP_KERNEL); | |
e293e599 | 2209 | if (!gspca_dev) { |
133a9fe9 | 2210 | pr_err("couldn't kzalloc gspca struct\n"); |
e293e599 | 2211 | return -ENOMEM; |
63eb9546 | 2212 | } |
8295d99e JFM |
2213 | gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL); |
2214 | if (!gspca_dev->usb_buf) { | |
133a9fe9 | 2215 | pr_err("out of memory\n"); |
e293e599 | 2216 | ret = -ENOMEM; |
8295d99e JFM |
2217 | goto out; |
2218 | } | |
63eb9546 | 2219 | gspca_dev->dev = dev; |
4462864d | 2220 | gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber; |
d43fa32f | 2221 | gspca_dev->nbalt = intf->num_altsetting; |
35680baa JFM |
2222 | |
2223 | /* check if any audio device */ | |
2224 | if (dev->config->desc.bNumInterfaces != 1) { | |
2225 | int i; | |
2226 | struct usb_interface *intf2; | |
2227 | ||
2228 | for (i = 0; i < dev->config->desc.bNumInterfaces; i++) { | |
2229 | intf2 = dev->config->interface[i]; | |
2230 | if (intf2 != NULL | |
2231 | && intf2->altsetting != NULL | |
2232 | && intf2->altsetting->desc.bInterfaceClass == | |
2233 | USB_CLASS_AUDIO) { | |
2234 | gspca_dev->audio = 1; | |
2235 | break; | |
2236 | } | |
2237 | } | |
2238 | } | |
2239 | ||
63eb9546 | 2240 | gspca_dev->sd_desc = sd_desc; |
63eb9546 | 2241 | gspca_dev->nbufread = 2; |
ff374747 | 2242 | gspca_dev->empty_packet = -1; /* don't check the empty packets */ |
63eb9546 | 2243 | |
012d6b02 | 2244 | /* configure the subdriver and initialize the USB device */ |
ba38ee8e | 2245 | ret = sd_desc->config(gspca_dev, id); |
012d6b02 JFM |
2246 | if (ret < 0) |
2247 | goto out; | |
6a33091f JFM |
2248 | if (gspca_dev->cam.ctrls != NULL) |
2249 | ctrls_init(gspca_dev); | |
ba38ee8e | 2250 | ret = sd_desc->init(gspca_dev); |
63eb9546 JFM |
2251 | if (ret < 0) |
2252 | goto out; | |
2253 | gspca_set_default_mode(gspca_dev); | |
2254 | ||
10ee2402 HG |
2255 | ret = gspca_input_connect(gspca_dev); |
2256 | if (ret) | |
2257 | goto out; | |
2258 | ||
63eb9546 | 2259 | mutex_init(&gspca_dev->usb_lock); |
63eb9546 JFM |
2260 | mutex_init(&gspca_dev->queue_lock); |
2261 | init_waitqueue_head(&gspca_dev->wq); | |
2262 | ||
2263 | /* init video stuff */ | |
ba38ee8e | 2264 | memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template); |
24441631 | 2265 | gspca_dev->vdev.parent = &intf->dev; |
5c4fa002 | 2266 | gspca_dev->module = module; |
ee56a4d3 | 2267 | gspca_dev->present = 1; |
a12ca6a6 | 2268 | ret = video_register_device(&gspca_dev->vdev, |
63eb9546 | 2269 | VFL_TYPE_GRABBER, |
8d584a53 | 2270 | -1); |
63eb9546 | 2271 | if (ret < 0) { |
133a9fe9 | 2272 | pr_err("video_register_device err %d\n", ret); |
63eb9546 JFM |
2273 | goto out; |
2274 | } | |
2275 | ||
63eb9546 | 2276 | usb_set_intfdata(intf, gspca_dev); |
38c7c036 | 2277 | PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev)); |
0274d42e | 2278 | |
10ee2402 | 2279 | gspca_input_create_urb(gspca_dev); |
0274d42e | 2280 | |
63eb9546 JFM |
2281 | return 0; |
2282 | out: | |
f7628015 | 2283 | #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) |
10ee2402 HG |
2284 | if (gspca_dev->input_dev) |
2285 | input_unregister_device(gspca_dev->input_dev); | |
e7637521 | 2286 | #endif |
e07a1d8a JFM |
2287 | kfree(gspca_dev->usb_buf); |
2288 | kfree(gspca_dev); | |
63eb9546 JFM |
2289 | return ret; |
2290 | } | |
4462864d JFM |
2291 | EXPORT_SYMBOL(gspca_dev_probe2); |
2292 | ||
2293 | /* same function as the previous one, but check the interface */ | |
2294 | int gspca_dev_probe(struct usb_interface *intf, | |
2295 | const struct usb_device_id *id, | |
2296 | const struct sd_desc *sd_desc, | |
2297 | int dev_size, | |
2298 | struct module *module) | |
2299 | { | |
2300 | struct usb_device *dev = interface_to_usbdev(intf); | |
2301 | ||
2302 | /* we don't handle multi-config cameras */ | |
2303 | if (dev->descriptor.bNumConfigurations != 1) { | |
133a9fe9 JP |
2304 | pr_err("%04x:%04x too many config\n", |
2305 | id->idVendor, id->idProduct); | |
4462864d JFM |
2306 | return -ENODEV; |
2307 | } | |
2308 | ||
2309 | /* the USB video interface must be the first one */ | |
2310 | if (dev->config->desc.bNumInterfaces != 1 | |
c4dc692c | 2311 | && intf->cur_altsetting->desc.bInterfaceNumber != 0) |
4462864d | 2312 | return -ENODEV; |
4462864d JFM |
2313 | |
2314 | return gspca_dev_probe2(intf, id, sd_desc, dev_size, module); | |
2315 | } | |
63eb9546 JFM |
2316 | EXPORT_SYMBOL(gspca_dev_probe); |
2317 | ||
2318 | /* | |
2319 | * USB disconnection | |
2320 | * | |
2321 | * This function must be called by the sub-driver | |
2322 | * when the device disconnects, after the specific resources are freed. | |
2323 | */ | |
2324 | void gspca_disconnect(struct usb_interface *intf) | |
2325 | { | |
4aa0d037 | 2326 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
f7628015 | 2327 | #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) |
0274d42e | 2328 | struct input_dev *input_dev; |
e070bf9e | 2329 | #endif |
63eb9546 | 2330 | |
38c7c036 LP |
2331 | PDEBUG(D_PROBE, "%s disconnect", |
2332 | video_device_node_name(&gspca_dev->vdev)); | |
ad28127d | 2333 | mutex_lock(&gspca_dev->usb_lock); |
4e770f76 | 2334 | |
6e4ae872 | 2335 | gspca_dev->present = 0; |
4e770f76 | 2336 | wake_up_interruptible(&gspca_dev->wq); |
6e4ae872 | 2337 | |
4e770f76 | 2338 | destroy_urbs(gspca_dev); |
090264e5 | 2339 | |
f7628015 | 2340 | #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE) |
0274d42e MN |
2341 | gspca_input_destroy_urb(gspca_dev); |
2342 | input_dev = gspca_dev->input_dev; | |
2343 | if (input_dev) { | |
2344 | gspca_dev->input_dev = NULL; | |
2345 | input_unregister_device(input_dev); | |
2346 | } | |
e070bf9e | 2347 | #endif |
0274d42e | 2348 | |
090264e5 | 2349 | /* the device is freed at exit of this function */ |
ad28127d | 2350 | gspca_dev->dev = NULL; |
090264e5 JFM |
2351 | mutex_unlock(&gspca_dev->usb_lock); |
2352 | ||
6b060ffe FZ |
2353 | usb_set_intfdata(intf, NULL); |
2354 | ||
a12ca6a6 | 2355 | /* release the device */ |
25985edc | 2356 | /* (this will call gspca_release() immediately or on last close) */ |
a12ca6a6 | 2357 | video_unregister_device(&gspca_dev->vdev); |
3145b8c1 | 2358 | |
0d07e240 | 2359 | /* PDEBUG(D_PROBE, "disconnect complete"); */ |
63eb9546 JFM |
2360 | } |
2361 | EXPORT_SYMBOL(gspca_disconnect); | |
2362 | ||
6a709749 JFM |
2363 | #ifdef CONFIG_PM |
2364 | int gspca_suspend(struct usb_interface *intf, pm_message_t message) | |
2365 | { | |
2366 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
2367 | ||
2368 | if (!gspca_dev->streaming) | |
2369 | return 0; | |
2370 | gspca_dev->frozen = 1; /* avoid urb error messages */ | |
012d6b02 JFM |
2371 | if (gspca_dev->sd_desc->stopN) |
2372 | gspca_dev->sd_desc->stopN(gspca_dev); | |
6a709749 | 2373 | destroy_urbs(gspca_dev); |
0274d42e | 2374 | gspca_input_destroy_urb(gspca_dev); |
6a709749 | 2375 | gspca_set_alt0(gspca_dev); |
012d6b02 JFM |
2376 | if (gspca_dev->sd_desc->stop0) |
2377 | gspca_dev->sd_desc->stop0(gspca_dev); | |
6a709749 JFM |
2378 | return 0; |
2379 | } | |
2380 | EXPORT_SYMBOL(gspca_suspend); | |
2381 | ||
2382 | int gspca_resume(struct usb_interface *intf) | |
2383 | { | |
2384 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
2385 | ||
2386 | gspca_dev->frozen = 0; | |
012d6b02 | 2387 | gspca_dev->sd_desc->init(gspca_dev); |
0274d42e | 2388 | gspca_input_create_urb(gspca_dev); |
012d6b02 JFM |
2389 | if (gspca_dev->streaming) |
2390 | return gspca_init_transfer(gspca_dev); | |
1e89e2da | 2391 | return 0; |
6a709749 JFM |
2392 | } |
2393 | EXPORT_SYMBOL(gspca_resume); | |
2394 | #endif | |
dcef3237 HG |
2395 | /* -- cam driver utility functions -- */ |
2396 | ||
2397 | /* auto gain and exposure algorithm based on the knee algorithm described here: | |
2398 | http://ytse.tricolour.net/docs/LowLightOptimization.html | |
2399 | ||
2400 | Returns 0 if no changes were made, 1 if the gain and or exposure settings | |
2401 | where changed. */ | |
2402 | int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum, | |
2403 | int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee) | |
2404 | { | |
2405 | int i, steps, gain, orig_gain, exposure, orig_exposure, autogain; | |
2406 | const struct ctrl *gain_ctrl = NULL; | |
2407 | const struct ctrl *exposure_ctrl = NULL; | |
2408 | const struct ctrl *autogain_ctrl = NULL; | |
2409 | int retval = 0; | |
2410 | ||
2411 | for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) { | |
26984b09 HG |
2412 | if (gspca_dev->ctrl_dis & (1 << i)) |
2413 | continue; | |
dcef3237 HG |
2414 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN) |
2415 | gain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2416 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE) | |
2417 | exposure_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2418 | if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN) | |
2419 | autogain_ctrl = &gspca_dev->sd_desc->ctrls[i]; | |
2420 | } | |
2421 | if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) { | |
2422 | PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called " | |
2423 | "on cam without (auto)gain/exposure"); | |
2424 | return 0; | |
2425 | } | |
2426 | ||
2427 | if (gain_ctrl->get(gspca_dev, &gain) || | |
2428 | exposure_ctrl->get(gspca_dev, &exposure) || | |
2429 | autogain_ctrl->get(gspca_dev, &autogain) || !autogain) | |
2430 | return 0; | |
2431 | ||
2432 | orig_gain = gain; | |
2433 | orig_exposure = exposure; | |
2434 | ||
2435 | /* If we are of a multiple of deadzone, do multiple steps to reach the | |
2436 | desired lumination fast (with the risc of a slight overshoot) */ | |
2437 | steps = abs(desired_avg_lum - avg_lum) / deadzone; | |
2438 | ||
1c44d81d | 2439 | PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d", |
dcef3237 HG |
2440 | avg_lum, desired_avg_lum, steps); |
2441 | ||
2442 | for (i = 0; i < steps; i++) { | |
2443 | if (avg_lum > desired_avg_lum) { | |
2444 | if (gain > gain_knee) | |
2445 | gain--; | |
2446 | else if (exposure > exposure_knee) | |
2447 | exposure--; | |
2448 | else if (gain > gain_ctrl->qctrl.default_value) | |
2449 | gain--; | |
2450 | else if (exposure > exposure_ctrl->qctrl.minimum) | |
2451 | exposure--; | |
2452 | else if (gain > gain_ctrl->qctrl.minimum) | |
2453 | gain--; | |
2454 | else | |
2455 | break; | |
2456 | } else { | |
2457 | if (gain < gain_ctrl->qctrl.default_value) | |
2458 | gain++; | |
2459 | else if (exposure < exposure_knee) | |
2460 | exposure++; | |
2461 | else if (gain < gain_knee) | |
2462 | gain++; | |
2463 | else if (exposure < exposure_ctrl->qctrl.maximum) | |
2464 | exposure++; | |
2465 | else if (gain < gain_ctrl->qctrl.maximum) | |
2466 | gain++; | |
2467 | else | |
2468 | break; | |
2469 | } | |
2470 | } | |
2471 | ||
2472 | if (gain != orig_gain) { | |
2473 | gain_ctrl->set(gspca_dev, gain); | |
2474 | retval = 1; | |
2475 | } | |
2476 | if (exposure != orig_exposure) { | |
2477 | exposure_ctrl->set(gspca_dev, exposure); | |
2478 | retval = 1; | |
2479 | } | |
2480 | ||
2481 | return retval; | |
2482 | } | |
2483 | EXPORT_SYMBOL(gspca_auto_gain_n_exposure); | |
2484 | ||
63eb9546 JFM |
2485 | /* -- module insert / remove -- */ |
2486 | static int __init gspca_init(void) | |
2487 | { | |
133a9fe9 | 2488 | pr_info("v" DRIVER_VERSION_NUMBER " registered\n"); |
63eb9546 JFM |
2489 | return 0; |
2490 | } | |
2491 | static void __exit gspca_exit(void) | |
2492 | { | |
63eb9546 JFM |
2493 | } |
2494 | ||
2495 | module_init(gspca_init); | |
2496 | module_exit(gspca_exit); | |
2497 | ||
335b3f88 | 2498 | #ifdef GSPCA_DEBUG |
63eb9546 JFM |
2499 | module_param_named(debug, gspca_debug, int, 0644); |
2500 | MODULE_PARM_DESC(debug, | |
2501 | "Debug (bit) 0x01:error 0x02:probe 0x04:config" | |
f8e5677f | 2502 | " 0x08:stream 0x10:frame 0x20:packet" |
d43fa32f | 2503 | " 0x0100: v4l2"); |
6a7eba24 | 2504 | #endif |