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 | ||
f22123fa | 26 | #define GSPCA_VERSION "2.14.0" |
63eb9546 JFM |
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> |
62bba5dd | 41 | #include <media/v4l2-ctrls.h> |
2333565d | 42 | #include <media/v4l2-fh.h> |
d57fb9f8 | 43 | #include <media/v4l2-event.h> |
63eb9546 JFM |
44 | |
45 | #include "gspca.h" | |
46 | ||
13a00fab | 47 | #if IS_ENABLED(CONFIG_INPUT) |
0274d42e MN |
48 | #include <linux/input.h> |
49 | #include <linux/usb/input.h> | |
e070bf9e | 50 | #endif |
0274d42e | 51 | |
d43fa32f | 52 | /* global values */ |
8fee8453 JFM |
53 | #define DEF_NURBS 3 /* default number of URBs */ |
54 | #if DEF_NURBS > MAX_NURBS | |
55 | #error "DEF_NURBS too big" | |
56 | #endif | |
d43fa32f | 57 | |
27c6f9e5 | 58 | MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>"); |
63eb9546 JFM |
59 | MODULE_DESCRIPTION("GSPCA USB Camera Driver"); |
60 | MODULE_LICENSE("GPL"); | |
f22123fa | 61 | MODULE_VERSION(GSPCA_VERSION); |
63eb9546 | 62 | |
c93396e1 | 63 | int gspca_debug; |
63eb9546 JFM |
64 | EXPORT_SYMBOL(gspca_debug); |
65 | ||
c93396e1 TK |
66 | static void PDEBUG_MODE(struct gspca_dev *gspca_dev, int debug, char *txt, |
67 | __u32 pixfmt, int w, int h) | |
63eb9546 JFM |
68 | { |
69 | if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') { | |
c93396e1 | 70 | PDEBUG(debug, "%s %c%c%c%c %dx%d", |
63eb9546 JFM |
71 | txt, |
72 | pixfmt & 0xff, | |
73 | (pixfmt >> 8) & 0xff, | |
74 | (pixfmt >> 16) & 0xff, | |
75 | pixfmt >> 24, | |
76 | w, h); | |
77 | } else { | |
c93396e1 | 78 | PDEBUG(debug, "%s 0x%08x %dx%d", |
63eb9546 JFM |
79 | txt, |
80 | pixfmt, | |
81 | w, h); | |
82 | } | |
83 | } | |
63eb9546 | 84 | |
77ee3318 | 85 | /* specific memory types - !! should be different from V4L2_MEMORY_xxx */ |
d43fa32f JFM |
86 | #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */ |
87 | #define GSPCA_MEMORY_READ 7 | |
88 | ||
d43fa32f | 89 | #define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE) |
d43fa32f | 90 | |
63eb9546 JFM |
91 | /* |
92 | * VMA operations. | |
93 | */ | |
94 | static void gspca_vm_open(struct vm_area_struct *vma) | |
95 | { | |
96 | struct gspca_frame *frame = vma->vm_private_data; | |
97 | ||
98 | frame->vma_use_count++; | |
99 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED; | |
100 | } | |
101 | ||
102 | static void gspca_vm_close(struct vm_area_struct *vma) | |
103 | { | |
104 | struct gspca_frame *frame = vma->vm_private_data; | |
105 | ||
106 | if (--frame->vma_use_count <= 0) | |
107 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED; | |
108 | } | |
109 | ||
f0f37e2f | 110 | static const struct vm_operations_struct gspca_vm_ops = { |
63eb9546 JFM |
111 | .open = gspca_vm_open, |
112 | .close = gspca_vm_close, | |
113 | }; | |
114 | ||
0274d42e MN |
115 | /* |
116 | * Input and interrupt endpoint handling functions | |
117 | */ | |
13a00fab | 118 | #if IS_ENABLED(CONFIG_INPUT) |
0274d42e MN |
119 | static void int_irq(struct urb *urb) |
120 | { | |
121 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
122 | int ret; | |
123 | ||
124 | ret = urb->status; | |
125 | switch (ret) { | |
126 | case 0: | |
127 | if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev, | |
128 | urb->transfer_buffer, urb->actual_length) < 0) { | |
c93396e1 | 129 | PERR("Unknown packet received"); |
0274d42e MN |
130 | } |
131 | break; | |
132 | ||
133 | case -ENOENT: | |
134 | case -ECONNRESET: | |
135 | case -ENODEV: | |
136 | case -ESHUTDOWN: | |
137 | /* Stop is requested either by software or hardware is gone, | |
138 | * keep the ret value non-zero and don't resubmit later. | |
139 | */ | |
140 | break; | |
141 | ||
142 | default: | |
c93396e1 | 143 | PERR("URB error %i, resubmitting", urb->status); |
0274d42e MN |
144 | urb->status = 0; |
145 | ret = 0; | |
146 | } | |
147 | ||
148 | if (ret == 0) { | |
149 | ret = usb_submit_urb(urb, GFP_ATOMIC); | |
150 | if (ret < 0) | |
133a9fe9 | 151 | pr_err("Resubmit URB failed with error %i\n", ret); |
0274d42e MN |
152 | } |
153 | } | |
154 | ||
155 | static int gspca_input_connect(struct gspca_dev *dev) | |
156 | { | |
157 | struct input_dev *input_dev; | |
158 | int err = 0; | |
159 | ||
160 | dev->input_dev = NULL; | |
ac82f59f | 161 | if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) { |
0274d42e MN |
162 | input_dev = input_allocate_device(); |
163 | if (!input_dev) | |
164 | return -ENOMEM; | |
165 | ||
166 | usb_make_path(dev->dev, dev->phys, sizeof(dev->phys)); | |
167 | strlcat(dev->phys, "/input0", sizeof(dev->phys)); | |
168 | ||
169 | input_dev->name = dev->sd_desc->name; | |
170 | input_dev->phys = dev->phys; | |
171 | ||
172 | usb_to_input_id(dev->dev, &input_dev->id); | |
173 | ||
174 | input_dev->evbit[0] = BIT_MASK(EV_KEY); | |
175 | input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA); | |
176 | input_dev->dev.parent = &dev->dev->dev; | |
177 | ||
178 | err = input_register_device(input_dev); | |
179 | if (err) { | |
133a9fe9 JP |
180 | pr_err("Input device registration failed with error %i\n", |
181 | err); | |
0274d42e MN |
182 | input_dev->dev.parent = NULL; |
183 | input_free_device(input_dev); | |
184 | } else { | |
185 | dev->input_dev = input_dev; | |
186 | } | |
10ee2402 | 187 | } |
0274d42e MN |
188 | |
189 | return err; | |
190 | } | |
191 | ||
192 | static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev, | |
193 | struct usb_endpoint_descriptor *ep) | |
194 | { | |
195 | unsigned int buffer_len; | |
196 | int interval; | |
197 | struct urb *urb; | |
198 | struct usb_device *dev; | |
199 | void *buffer = NULL; | |
200 | int ret = -EINVAL; | |
201 | ||
b26d6e21 | 202 | buffer_len = le16_to_cpu(ep->wMaxPacketSize); |
0274d42e | 203 | interval = ep->bInterval; |
c4dc692c | 204 | PDEBUG(D_CONF, "found int in endpoint: 0x%x, " |
0274d42e MN |
205 | "buffer_len=%u, interval=%u", |
206 | ep->bEndpointAddress, buffer_len, interval); | |
207 | ||
208 | dev = gspca_dev->dev; | |
209 | ||
210 | urb = usb_alloc_urb(0, GFP_KERNEL); | |
211 | if (!urb) { | |
212 | ret = -ENOMEM; | |
213 | goto error; | |
214 | } | |
215 | ||
7a9b1492 | 216 | buffer = usb_alloc_coherent(dev, buffer_len, |
0274d42e MN |
217 | GFP_KERNEL, &urb->transfer_dma); |
218 | if (!buffer) { | |
219 | ret = -ENOMEM; | |
220 | goto error_buffer; | |
221 | } | |
222 | usb_fill_int_urb(urb, dev, | |
223 | usb_rcvintpipe(dev, ep->bEndpointAddress), | |
224 | buffer, buffer_len, | |
225 | int_irq, (void *)gspca_dev, interval); | |
882787ff | 226 | urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; |
0274d42e MN |
227 | ret = usb_submit_urb(urb, GFP_KERNEL); |
228 | if (ret < 0) { | |
c93396e1 | 229 | PERR("submit int URB failed with error %i", ret); |
0274d42e MN |
230 | goto error_submit; |
231 | } | |
2661da47 | 232 | gspca_dev->int_urb = urb; |
0274d42e MN |
233 | return ret; |
234 | ||
235 | error_submit: | |
997ea58e DM |
236 | usb_free_coherent(dev, |
237 | urb->transfer_buffer_length, | |
238 | urb->transfer_buffer, | |
239 | urb->transfer_dma); | |
0274d42e MN |
240 | error_buffer: |
241 | usb_free_urb(urb); | |
242 | error: | |
243 | return ret; | |
244 | } | |
245 | ||
10ee2402 | 246 | static void gspca_input_create_urb(struct gspca_dev *gspca_dev) |
0274d42e | 247 | { |
0274d42e MN |
248 | struct usb_interface *intf; |
249 | struct usb_host_interface *intf_desc; | |
250 | struct usb_endpoint_descriptor *ep; | |
251 | int i; | |
252 | ||
253 | if (gspca_dev->sd_desc->int_pkt_scan) { | |
254 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); | |
255 | intf_desc = intf->cur_altsetting; | |
256 | for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) { | |
257 | ep = &intf_desc->endpoint[i].desc; | |
258 | if (usb_endpoint_dir_in(ep) && | |
259 | usb_endpoint_xfer_int(ep)) { | |
260 | ||
10ee2402 | 261 | alloc_and_submit_int_urb(gspca_dev, ep); |
0274d42e MN |
262 | break; |
263 | } | |
264 | } | |
265 | } | |
0274d42e MN |
266 | } |
267 | ||
268 | static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) | |
269 | { | |
270 | struct urb *urb; | |
271 | ||
272 | urb = gspca_dev->int_urb; | |
273 | if (urb) { | |
274 | gspca_dev->int_urb = NULL; | |
275 | usb_kill_urb(urb); | |
997ea58e DM |
276 | usb_free_coherent(gspca_dev->dev, |
277 | urb->transfer_buffer_length, | |
278 | urb->transfer_buffer, | |
279 | urb->transfer_dma); | |
0274d42e MN |
280 | usb_free_urb(urb); |
281 | } | |
282 | } | |
f7628015 RD |
283 | #else |
284 | static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev) | |
285 | { | |
286 | } | |
287 | ||
288 | static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev) | |
289 | { | |
290 | } | |
291 | ||
292 | static inline int gspca_input_connect(struct gspca_dev *dev) | |
293 | { | |
294 | return 0; | |
295 | } | |
0274d42e MN |
296 | #endif |
297 | ||
63eb9546 | 298 | /* |
d43fa32f | 299 | * fill a video frame from an URB and resubmit |
63eb9546 | 300 | */ |
d43fa32f JFM |
301 | static void fill_frame(struct gspca_dev *gspca_dev, |
302 | struct urb *urb) | |
63eb9546 | 303 | { |
8d584a53 | 304 | u8 *data; /* address of data in the iso message */ |
1b60e1ad | 305 | int i, len, st; |
63eb9546 JFM |
306 | cam_pkt_op pkt_scan; |
307 | ||
6a7eba24 | 308 | if (urb->status != 0) { |
090264e5 JFM |
309 | if (urb->status == -ESHUTDOWN) |
310 | return; /* disconnection */ | |
62ee8eee | 311 | #ifdef CONFIG_PM |
6a540bdf HG |
312 | if (gspca_dev->frozen) |
313 | return; | |
62ee8eee | 314 | #endif |
c93396e1 | 315 | PERR("urb status: %d", urb->status); |
8157852f | 316 | urb->status = 0; |
bf926adf | 317 | goto resubmit; |
6a7eba24 | 318 | } |
63eb9546 JFM |
319 | pkt_scan = gspca_dev->sd_desc->pkt_scan; |
320 | for (i = 0; i < urb->number_of_packets; i++) { | |
95f18be2 | 321 | len = urb->iso_frame_desc[i].actual_length; |
63eb9546 | 322 | |
63eb9546 | 323 | /* check the packet status and length */ |
63eb9546 JFM |
324 | st = urb->iso_frame_desc[i].status; |
325 | if (st) { | |
133a9fe9 JP |
326 | pr_err("ISOC data error: [%d] len=%d, status=%d\n", |
327 | i, len, st); | |
63eb9546 JFM |
328 | gspca_dev->last_packet_type = DISCARD_PACKET; |
329 | continue; | |
330 | } | |
76ebc16b JFM |
331 | if (len == 0) { |
332 | if (gspca_dev->empty_packet == 0) | |
333 | gspca_dev->empty_packet = 1; | |
334 | continue; | |
335 | } | |
63eb9546 JFM |
336 | |
337 | /* let the packet be analyzed by the subdriver */ | |
338 | PDEBUG(D_PACK, "packet [%d] o:%d l:%d", | |
339 | i, urb->iso_frame_desc[i].offset, len); | |
8d584a53 | 340 | data = (u8 *) urb->transfer_buffer |
63eb9546 | 341 | + urb->iso_frame_desc[i].offset; |
76dd272b | 342 | pkt_scan(gspca_dev, data, len); |
63eb9546 JFM |
343 | } |
344 | ||
bf926adf | 345 | resubmit: |
63eb9546 | 346 | /* resubmit the URB */ |
63eb9546 JFM |
347 | st = usb_submit_urb(urb, GFP_ATOMIC); |
348 | if (st < 0) | |
133a9fe9 | 349 | pr_err("usb_submit_urb() ret %d\n", st); |
63eb9546 JFM |
350 | } |
351 | ||
d43fa32f JFM |
352 | /* |
353 | * ISOC message interrupt from the USB device | |
354 | * | |
ac0d6df6 | 355 | * Analyse each packet and call the subdriver for copy to the frame buffer. |
d43fa32f | 356 | */ |
8d584a53 | 357 | static void isoc_irq(struct urb *urb) |
d43fa32f JFM |
358 | { |
359 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
360 | ||
3647fea8 | 361 | PDEBUG(D_PACK, "isoc irq"); |
d43fa32f JFM |
362 | if (!gspca_dev->streaming) |
363 | return; | |
364 | fill_frame(gspca_dev, urb); | |
365 | } | |
366 | ||
0be01004 JFM |
367 | /* |
368 | * bulk message interrupt from the USB device | |
369 | */ | |
8d584a53 | 370 | static void bulk_irq(struct urb *urb) |
0be01004 JFM |
371 | { |
372 | struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context; | |
dff369aa | 373 | int st; |
0be01004 JFM |
374 | |
375 | PDEBUG(D_PACK, "bulk irq"); | |
376 | if (!gspca_dev->streaming) | |
377 | return; | |
880ae24d JFM |
378 | switch (urb->status) { |
379 | case 0: | |
380 | break; | |
090264e5 JFM |
381 | case -ESHUTDOWN: |
382 | return; /* disconnection */ | |
880ae24d | 383 | default: |
0be01004 | 384 | #ifdef CONFIG_PM |
6a540bdf HG |
385 | if (gspca_dev->frozen) |
386 | return; | |
0be01004 | 387 | #endif |
c93396e1 | 388 | PERR("urb status: %d", urb->status); |
8157852f | 389 | urb->status = 0; |
bf926adf | 390 | goto resubmit; |
0be01004 JFM |
391 | } |
392 | ||
d131c3c9 JFM |
393 | PDEBUG(D_PACK, "packet l:%d", urb->actual_length); |
394 | gspca_dev->sd_desc->pkt_scan(gspca_dev, | |
d131c3c9 JFM |
395 | urb->transfer_buffer, |
396 | urb->actual_length); | |
dff369aa | 397 | |
bf926adf | 398 | resubmit: |
dff369aa AO |
399 | /* resubmit the URB */ |
400 | if (gspca_dev->cam.bulk_nurbs != 0) { | |
401 | st = usb_submit_urb(urb, GFP_ATOMIC); | |
402 | if (st < 0) | |
133a9fe9 | 403 | pr_err("usb_submit_urb() ret %d\n", st); |
dff369aa | 404 | } |
0be01004 JFM |
405 | } |
406 | ||
63eb9546 JFM |
407 | /* |
408 | * add data to the current frame | |
409 | * | |
ac0d6df6 JFM |
410 | * This function is called by the subdrivers at interrupt level. |
411 | * | |
63eb9546 JFM |
412 | * To build a frame, these ones must add |
413 | * - one FIRST_PACKET | |
414 | * - 0 or many INTER_PACKETs | |
415 | * - one LAST_PACKET | |
416 | * DISCARD_PACKET invalidates the whole frame. | |
63eb9546 | 417 | */ |
76dd272b JFM |
418 | void gspca_frame_add(struct gspca_dev *gspca_dev, |
419 | enum gspca_packet_type packet_type, | |
420 | const u8 *data, | |
421 | int len) | |
63eb9546 | 422 | { |
3ec342f2 | 423 | struct gspca_frame *frame; |
63eb9546 JFM |
424 | int i, j; |
425 | ||
e2997a72 | 426 | PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len); |
d131c3c9 | 427 | |
63eb9546 | 428 | if (packet_type == FIRST_PACKET) { |
f7059eaa JFM |
429 | i = atomic_read(&gspca_dev->fr_i); |
430 | ||
431 | /* if there are no queued buffer, discard the whole frame */ | |
432 | if (i == atomic_read(&gspca_dev->fr_q)) { | |
433 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
2e0544a8 | 434 | gspca_dev->sequence++; |
f7059eaa JFM |
435 | return; |
436 | } | |
b192ca98 JFM |
437 | j = gspca_dev->fr_queue[i]; |
438 | frame = &gspca_dev->frame[j]; | |
5ba0e2c3 | 439 | v4l2_get_timestamp(&frame->v4l2_buf.timestamp); |
2e0544a8 | 440 | frame->v4l2_buf.sequence = gspca_dev->sequence++; |
f7059eaa | 441 | gspca_dev->image = frame->data; |
b192ca98 | 442 | gspca_dev->image_len = 0; |
fe988f56 JFM |
443 | } else { |
444 | switch (gspca_dev->last_packet_type) { | |
445 | case DISCARD_PACKET: | |
fa4376d2 | 446 | if (packet_type == LAST_PACKET) { |
fe988f56 | 447 | gspca_dev->last_packet_type = packet_type; |
fa4376d2 HG |
448 | gspca_dev->image = NULL; |
449 | gspca_dev->image_len = 0; | |
450 | } | |
fe988f56 JFM |
451 | return; |
452 | case LAST_PACKET: | |
453 | return; | |
454 | } | |
d43fa32f | 455 | } |
63eb9546 | 456 | |
d43fa32f | 457 | /* append the packet to the frame buffer */ |
63eb9546 | 458 | if (len > 0) { |
b192ca98 | 459 | if (gspca_dev->image_len + len > gspca_dev->frsz) { |
c93396e1 | 460 | PERR("frame overflow %d > %d", |
b192ca98 JFM |
461 | gspca_dev->image_len + len, |
462 | gspca_dev->frsz); | |
63eb9546 JFM |
463 | packet_type = DISCARD_PACKET; |
464 | } else { | |
fe988f56 JFM |
465 | /* !! image is NULL only when last pkt is LAST or DISCARD |
466 | if (gspca_dev->image == NULL) { | |
133a9fe9 | 467 | pr_err("gspca_frame_add() image == NULL\n"); |
fe988f56 JFM |
468 | return; |
469 | } | |
470 | */ | |
b192ca98 JFM |
471 | memcpy(gspca_dev->image + gspca_dev->image_len, |
472 | data, len); | |
473 | gspca_dev->image_len += len; | |
63eb9546 JFM |
474 | } |
475 | } | |
476 | gspca_dev->last_packet_type = packet_type; | |
477 | ||
f7059eaa JFM |
478 | /* if last packet, invalidate packet concatenation until |
479 | * next first packet, wake up the application and advance | |
480 | * in the queue */ | |
63eb9546 | 481 | if (packet_type == LAST_PACKET) { |
f7059eaa | 482 | i = atomic_read(&gspca_dev->fr_i); |
b192ca98 JFM |
483 | j = gspca_dev->fr_queue[i]; |
484 | frame = &gspca_dev->frame[j]; | |
485 | frame->v4l2_buf.bytesused = gspca_dev->image_len; | |
02bbcb9d JFM |
486 | frame->v4l2_buf.flags = (frame->v4l2_buf.flags |
487 | | V4L2_BUF_FLAG_DONE) | |
488 | & ~V4L2_BUF_FLAG_QUEUED; | |
f7059eaa JFM |
489 | i = (i + 1) % GSPCA_MAX_FRAMES; |
490 | atomic_set(&gspca_dev->fr_i, i); | |
63eb9546 | 491 | wake_up_interruptible(&gspca_dev->wq); /* event = new frame */ |
f7059eaa JFM |
492 | PDEBUG(D_FRAM, "frame complete len:%d", |
493 | frame->v4l2_buf.bytesused); | |
494 | gspca_dev->image = NULL; | |
495 | gspca_dev->image_len = 0; | |
63eb9546 | 496 | } |
63eb9546 JFM |
497 | } |
498 | EXPORT_SYMBOL(gspca_frame_add); | |
499 | ||
d642de2e HG |
500 | static int frame_alloc(struct gspca_dev *gspca_dev, struct file *file, |
501 | enum v4l2_memory memory, unsigned int count) | |
63eb9546 | 502 | { |
d43fa32f JFM |
503 | struct gspca_frame *frame; |
504 | unsigned int frsz; | |
505 | int i; | |
63eb9546 | 506 | |
1966bc2a | 507 | frsz = gspca_dev->pixfmt.sizeimage; |
63eb9546 | 508 | PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz); |
63eb9546 | 509 | frsz = PAGE_ALIGN(frsz); |
f7059eaa JFM |
510 | if (count >= GSPCA_MAX_FRAMES) |
511 | count = GSPCA_MAX_FRAMES - 1; | |
e795d912 | 512 | gspca_dev->frbuf = vmalloc_32(frsz * count); |
ac0d6df6 | 513 | if (!gspca_dev->frbuf) { |
133a9fe9 | 514 | pr_err("frame alloc failed\n"); |
ac0d6df6 | 515 | return -ENOMEM; |
63eb9546 | 516 | } |
d642de2e HG |
517 | gspca_dev->capt_file = file; |
518 | gspca_dev->memory = memory; | |
519 | gspca_dev->frsz = frsz; | |
63eb9546 JFM |
520 | gspca_dev->nframes = count; |
521 | for (i = 0; i < count; i++) { | |
d43fa32f JFM |
522 | frame = &gspca_dev->frame[i]; |
523 | frame->v4l2_buf.index = i; | |
524 | frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
c21f0cb4 | 525 | frame->v4l2_buf.flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
d43fa32f JFM |
526 | frame->v4l2_buf.field = V4L2_FIELD_NONE; |
527 | frame->v4l2_buf.length = frsz; | |
d642de2e | 528 | frame->v4l2_buf.memory = memory; |
d43fa32f | 529 | frame->v4l2_buf.sequence = 0; |
b192ca98 | 530 | frame->data = gspca_dev->frbuf + i * frsz; |
ac0d6df6 | 531 | frame->v4l2_buf.m.offset = i * frsz; |
63eb9546 | 532 | } |
f7059eaa JFM |
533 | atomic_set(&gspca_dev->fr_q, 0); |
534 | atomic_set(&gspca_dev->fr_i, 0); | |
535 | gspca_dev->fr_o = 0; | |
d43fa32f | 536 | return 0; |
63eb9546 JFM |
537 | } |
538 | ||
539 | static void frame_free(struct gspca_dev *gspca_dev) | |
540 | { | |
541 | int i; | |
542 | ||
543 | PDEBUG(D_STREAM, "frame free"); | |
efab8211 | 544 | if (gspca_dev->frbuf != NULL) { |
e795d912 | 545 | vfree(gspca_dev->frbuf); |
63eb9546 JFM |
546 | gspca_dev->frbuf = NULL; |
547 | for (i = 0; i < gspca_dev->nframes; i++) | |
548 | gspca_dev->frame[i].data = NULL; | |
549 | } | |
550 | gspca_dev->nframes = 0; | |
d642de2e HG |
551 | gspca_dev->frsz = 0; |
552 | gspca_dev->capt_file = NULL; | |
553 | gspca_dev->memory = GSPCA_MEMORY_NO; | |
63eb9546 JFM |
554 | } |
555 | ||
d43fa32f | 556 | static void destroy_urbs(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
557 | { |
558 | struct urb *urb; | |
559 | unsigned int i; | |
560 | ||
561 | PDEBUG(D_STREAM, "kill transfer"); | |
44732819 | 562 | for (i = 0; i < MAX_NURBS; i++) { |
4aa0d037 | 563 | urb = gspca_dev->urb[i]; |
63eb9546 | 564 | if (urb == NULL) |
d43fa32f | 565 | break; |
63eb9546 | 566 | |
4aa0d037 | 567 | gspca_dev->urb[i] = NULL; |
090264e5 | 568 | usb_kill_urb(urb); |
8b2c3da1 WY |
569 | usb_free_coherent(gspca_dev->dev, |
570 | urb->transfer_buffer_length, | |
571 | urb->transfer_buffer, | |
572 | urb->transfer_dma); | |
63eb9546 JFM |
573 | usb_free_urb(urb); |
574 | } | |
63eb9546 JFM |
575 | } |
576 | ||
e4dac289 JFM |
577 | static int gspca_set_alt0(struct gspca_dev *gspca_dev) |
578 | { | |
579 | int ret; | |
580 | ||
581 | if (gspca_dev->alt == 0) | |
582 | return 0; | |
583 | ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0); | |
584 | if (ret < 0) | |
133a9fe9 | 585 | pr_err("set alt 0 err %d\n", ret); |
e4dac289 JFM |
586 | return ret; |
587 | } | |
588 | ||
589 | /* Note: both the queue and the usb locks should be held when calling this */ | |
590 | static void gspca_stream_off(struct gspca_dev *gspca_dev) | |
591 | { | |
592 | gspca_dev->streaming = 0; | |
a3cc74d4 | 593 | gspca_dev->usb_err = 0; |
eb238732 HG |
594 | if (gspca_dev->sd_desc->stopN) |
595 | gspca_dev->sd_desc->stopN(gspca_dev); | |
596 | destroy_urbs(gspca_dev); | |
597 | gspca_input_destroy_urb(gspca_dev); | |
598 | gspca_set_alt0(gspca_dev); | |
599 | gspca_input_create_urb(gspca_dev); | |
e4dac289 JFM |
600 | if (gspca_dev->sd_desc->stop0) |
601 | gspca_dev->sd_desc->stop0(gspca_dev); | |
602 | PDEBUG(D_STREAM, "stream off OK"); | |
603 | } | |
604 | ||
63eb9546 | 605 | /* |
2fe15245 AO |
606 | * look for an input transfer endpoint in an alternate setting. |
607 | * | |
608 | * If xfer_ep is invalid, return the first valid ep found, otherwise | |
609 | * look for exactly the ep with address equal to xfer_ep. | |
63eb9546 | 610 | */ |
0be01004 | 611 | static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt, |
2fe15245 | 612 | int xfer, int xfer_ep) |
63eb9546 JFM |
613 | { |
614 | struct usb_host_endpoint *ep; | |
615 | int i, attr; | |
616 | ||
63eb9546 JFM |
617 | for (i = 0; i < alt->desc.bNumEndpoints; i++) { |
618 | ep = &alt->endpoint[i]; | |
50e06dee | 619 | attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; |
30d35e49 | 620 | if (attr == xfer |
7106225a | 621 | && ep->desc.wMaxPacketSize != 0 |
2fe15245 AO |
622 | && usb_endpoint_dir_in(&ep->desc) |
623 | && (xfer_ep < 0 || ep->desc.bEndpointAddress == xfer_ep)) | |
50e06dee | 624 | return ep; |
63eb9546 JFM |
625 | } |
626 | return NULL; | |
627 | } | |
628 | ||
27b12023 JFM |
629 | /* compute the minimum bandwidth for the current transfer */ |
630 | static u32 which_bandwidth(struct gspca_dev *gspca_dev) | |
631 | { | |
632 | u32 bandwidth; | |
27b12023 | 633 | |
18bef42c | 634 | /* get the (max) image size */ |
1966bc2a | 635 | bandwidth = gspca_dev->pixfmt.sizeimage; |
27b12023 | 636 | |
18bef42c | 637 | /* if the image is compressed, estimate its mean size */ |
eb3fb7c9 | 638 | if (!gspca_dev->cam.needs_full_bandwidth && |
1966bc2a OZ |
639 | bandwidth < gspca_dev->pixfmt.width * |
640 | gspca_dev->pixfmt.height) | |
18bef42c | 641 | bandwidth = bandwidth * 3 / 8; /* 0.375 */ |
27b12023 JFM |
642 | |
643 | /* estimate the frame rate */ | |
644 | if (gspca_dev->sd_desc->get_streamparm) { | |
645 | struct v4l2_streamparm parm; | |
646 | ||
27b12023 JFM |
647 | gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm); |
648 | bandwidth *= parm.parm.capture.timeperframe.denominator; | |
1153f04d | 649 | bandwidth /= parm.parm.capture.timeperframe.numerator; |
27b12023 | 650 | } else { |
18bef42c JFM |
651 | |
652 | /* don't hope more than 15 fps with USB 1.1 and | |
653 | * image resolution >= 640x480 */ | |
1966bc2a | 654 | if (gspca_dev->pixfmt.width >= 640 |
18bef42c JFM |
655 | && gspca_dev->dev->speed == USB_SPEED_FULL) |
656 | bandwidth *= 15; /* 15 fps */ | |
657 | else | |
658 | bandwidth *= 30; /* 30 fps */ | |
27b12023 JFM |
659 | } |
660 | ||
661 | PDEBUG(D_STREAM, "min bandwidth: %d", bandwidth); | |
662 | return bandwidth; | |
663 | } | |
664 | ||
665 | /* endpoint table */ | |
666 | #define MAX_ALT 16 | |
667 | struct ep_tb_s { | |
668 | u32 alt; | |
669 | u32 bandwidth; | |
670 | }; | |
671 | ||
63eb9546 | 672 | /* |
27b12023 JFM |
673 | * build the table of the endpoints |
674 | * and compute the minimum bandwidth for the image transfer | |
63eb9546 | 675 | */ |
66957b86 | 676 | static int build_isoc_ep_tb(struct gspca_dev *gspca_dev, |
27b12023 | 677 | struct usb_interface *intf, |
27b12023 | 678 | struct ep_tb_s *ep_tb) |
63eb9546 | 679 | { |
63eb9546 | 680 | struct usb_host_endpoint *ep; |
27b12023 JFM |
681 | int i, j, nbalt, psize, found; |
682 | u32 bandwidth, last_bw; | |
63eb9546 | 683 | |
27b12023 JFM |
684 | nbalt = intf->num_altsetting; |
685 | if (nbalt > MAX_ALT) | |
686 | nbalt = MAX_ALT; /* fixme: should warn */ | |
687 | ||
688 | /* build the endpoint table */ | |
689 | i = 0; | |
690 | last_bw = 0; | |
691 | for (;;) { | |
692 | ep_tb->bandwidth = 2000 * 2000 * 120; | |
693 | found = 0; | |
694 | for (j = 0; j < nbalt; j++) { | |
66957b86 | 695 | ep = alt_xfer(&intf->altsetting[j], |
2fe15245 AO |
696 | USB_ENDPOINT_XFER_ISOC, |
697 | gspca_dev->xfer_ep); | |
27b12023 JFM |
698 | if (ep == NULL) |
699 | continue; | |
d0d3435b HG |
700 | if (ep->desc.bInterval == 0) { |
701 | pr_err("alt %d iso endp with 0 interval\n", j); | |
702 | continue; | |
703 | } | |
27b12023 | 704 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
66957b86 | 705 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); |
d0d3435b | 706 | bandwidth = psize * 1000; |
27b12023 | 707 | if (gspca_dev->dev->speed == USB_SPEED_HIGH |
8ad2d06f | 708 | || gspca_dev->dev->speed >= USB_SPEED_SUPER) |
27b12023 | 709 | bandwidth *= 8; |
d0d3435b | 710 | bandwidth /= 1 << (ep->desc.bInterval - 1); |
27b12023 JFM |
711 | if (bandwidth <= last_bw) |
712 | continue; | |
713 | if (bandwidth < ep_tb->bandwidth) { | |
714 | ep_tb->bandwidth = bandwidth; | |
715 | ep_tb->alt = j; | |
716 | found = 1; | |
717 | } | |
95d9142c | 718 | } |
27b12023 JFM |
719 | if (!found) |
720 | break; | |
721 | PDEBUG(D_STREAM, "alt %d bandwidth %d", | |
722 | ep_tb->alt, ep_tb->bandwidth); | |
723 | last_bw = ep_tb->bandwidth; | |
724 | i++; | |
725 | ep_tb++; | |
726 | } | |
727 | ||
2d39059a HG |
728 | /* |
729 | * If the camera: | |
730 | * has a usb audio class interface (a built in usb mic); and | |
731 | * is a usb 1 full speed device; and | |
732 | * uses the max full speed iso bandwidth; and | |
733 | * and has more than 1 alt setting | |
734 | * then skip the highest alt setting to spare bandwidth for the mic | |
735 | */ | |
736 | if (gspca_dev->audio && | |
737 | gspca_dev->dev->speed == USB_SPEED_FULL && | |
738 | last_bw >= 1000000 && | |
739 | i > 1) { | |
740 | PDEBUG(D_STREAM, "dev has usb audio, skipping highest alt"); | |
741 | i--; | |
742 | ep_tb--; | |
743 | } | |
744 | ||
27b12023 JFM |
745 | /* get the requested bandwidth and start at the highest atlsetting */ |
746 | bandwidth = which_bandwidth(gspca_dev); | |
747 | ep_tb--; | |
748 | while (i > 1) { | |
749 | ep_tb--; | |
750 | if (ep_tb->bandwidth < bandwidth) | |
751 | break; | |
752 | i--; | |
63eb9546 | 753 | } |
27b12023 | 754 | return i; |
63eb9546 JFM |
755 | } |
756 | ||
757 | /* | |
0be01004 | 758 | * create the URBs for image transfer |
63eb9546 JFM |
759 | */ |
760 | static int create_urbs(struct gspca_dev *gspca_dev, | |
761 | struct usb_host_endpoint *ep) | |
762 | { | |
763 | struct urb *urb; | |
d43fa32f | 764 | int n, nurbs, i, psize, npkt, bsize; |
63eb9546 JFM |
765 | |
766 | /* calculate the packet size and the number of packets */ | |
63eb9546 | 767 | psize = le16_to_cpu(ep->desc.wMaxPacketSize); |
d43fa32f | 768 | |
6929dc6b | 769 | if (!gspca_dev->cam.bulk) { /* isoc */ |
95d9142c JFM |
770 | |
771 | /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */ | |
1f53b0b0 JFM |
772 | if (gspca_dev->pkt_size == 0) |
773 | psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3)); | |
774 | else | |
775 | psize = gspca_dev->pkt_size; | |
49cb6b04 JFM |
776 | npkt = gspca_dev->cam.npkt; |
777 | if (npkt == 0) | |
778 | npkt = 32; /* default value */ | |
0be01004 JFM |
779 | bsize = psize * npkt; |
780 | PDEBUG(D_STREAM, | |
781 | "isoc %d pkts size %d = bsize:%d", | |
782 | npkt, psize, bsize); | |
51977a8d | 783 | nurbs = DEF_NURBS; |
95d9142c | 784 | } else { /* bulk */ |
0be01004 | 785 | npkt = 0; |
dff369aa | 786 | bsize = gspca_dev->cam.bulk_size; |
95d9142c JFM |
787 | if (bsize == 0) |
788 | bsize = psize; | |
0be01004 | 789 | PDEBUG(D_STREAM, "bulk bsize:%d", bsize); |
dff369aa AO |
790 | if (gspca_dev->cam.bulk_nurbs != 0) |
791 | nurbs = gspca_dev->cam.bulk_nurbs; | |
792 | else | |
793 | nurbs = 1; | |
0be01004 JFM |
794 | } |
795 | ||
d43fa32f | 796 | for (n = 0; n < nurbs; n++) { |
63eb9546 | 797 | urb = usb_alloc_urb(npkt, GFP_KERNEL); |
452b53f7 | 798 | if (!urb) |
63eb9546 | 799 | return -ENOMEM; |
db870875 | 800 | gspca_dev->urb[n] = urb; |
997ea58e | 801 | urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev, |
63eb9546 JFM |
802 | bsize, |
803 | GFP_KERNEL, | |
804 | &urb->transfer_dma); | |
805 | ||
4aa0d037 | 806 | if (urb->transfer_buffer == NULL) { |
133a9fe9 | 807 | pr_err("usb_alloc_coherent failed\n"); |
63eb9546 JFM |
808 | return -ENOMEM; |
809 | } | |
63eb9546 JFM |
810 | urb->dev = gspca_dev->dev; |
811 | urb->context = gspca_dev; | |
63eb9546 | 812 | urb->transfer_buffer_length = bsize; |
0be01004 JFM |
813 | if (npkt != 0) { /* ISOC */ |
814 | urb->pipe = usb_rcvisocpipe(gspca_dev->dev, | |
815 | ep->desc.bEndpointAddress); | |
6c49da7f FZ |
816 | urb->transfer_flags = URB_ISO_ASAP |
817 | | URB_NO_TRANSFER_DMA_MAP; | |
51e23be2 | 818 | urb->interval = 1 << (ep->desc.bInterval - 1); |
0be01004 JFM |
819 | urb->complete = isoc_irq; |
820 | urb->number_of_packets = npkt; | |
821 | for (i = 0; i < npkt; i++) { | |
822 | urb->iso_frame_desc[i].length = psize; | |
823 | urb->iso_frame_desc[i].offset = psize * i; | |
824 | } | |
825 | } else { /* bulk */ | |
826 | urb->pipe = usb_rcvbulkpipe(gspca_dev->dev, | |
a23c1947 | 827 | ep->desc.bEndpointAddress); |
6c49da7f | 828 | urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; |
0be01004 | 829 | urb->complete = bulk_irq; |
63eb9546 JFM |
830 | } |
831 | } | |
832 | return 0; | |
833 | } | |
834 | ||
835 | /* | |
836 | * start the USB transfer | |
837 | */ | |
838 | static int gspca_init_transfer(struct gspca_dev *gspca_dev) | |
839 | { | |
27b12023 | 840 | struct usb_interface *intf; |
63eb9546 | 841 | struct usb_host_endpoint *ep; |
db870875 | 842 | struct urb *urb; |
27b12023 JFM |
843 | struct ep_tb_s ep_tb[MAX_ALT]; |
844 | int n, ret, xfer, alt, alt_idx; | |
63eb9546 | 845 | |
f7059eaa JFM |
846 | /* reset the streaming variables */ |
847 | gspca_dev->image = NULL; | |
848 | gspca_dev->image_len = 0; | |
849 | gspca_dev->last_packet_type = DISCARD_PACKET; | |
850 | gspca_dev->sequence = 0; | |
851 | ||
ab6c8cf2 JFM |
852 | gspca_dev->usb_err = 0; |
853 | ||
27b12023 | 854 | /* do the specific subdriver stuff before endpoint selection */ |
47faa6f8 HG |
855 | intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface); |
856 | gspca_dev->alt = gspca_dev->cam.bulk ? intf->num_altsetting : 0; | |
1f53b0b0 JFM |
857 | if (gspca_dev->sd_desc->isoc_init) { |
858 | ret = gspca_dev->sd_desc->isoc_init(gspca_dev); | |
859 | if (ret < 0) | |
a3d6e8cc | 860 | return ret; |
1f53b0b0 | 861 | } |
27b12023 JFM |
862 | xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK |
863 | : USB_ENDPOINT_XFER_ISOC; | |
314b3e08 | 864 | |
66957b86 | 865 | /* if bulk or the subdriver forced an altsetting, get the endpoint */ |
27b12023 JFM |
866 | if (gspca_dev->alt != 0) { |
867 | gspca_dev->alt--; /* (previous version compatibility) */ | |
2fe15245 AO |
868 | ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer, |
869 | gspca_dev->xfer_ep); | |
27b12023 JFM |
870 | if (ep == NULL) { |
871 | pr_err("bad altsetting %d\n", gspca_dev->alt); | |
a3d6e8cc | 872 | return -EIO; |
27b12023 JFM |
873 | } |
874 | ep_tb[0].alt = gspca_dev->alt; | |
875 | alt_idx = 1; | |
876 | } else { | |
59234e59 AO |
877 | /* else, compute the minimum bandwidth |
878 | * and build the endpoint table */ | |
66957b86 | 879 | alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb); |
27b12023 JFM |
880 | if (alt_idx <= 0) { |
881 | pr_err("no transfer endpoint found\n"); | |
a3d6e8cc | 882 | return -EIO; |
27b12023 | 883 | } |
1f53b0b0 | 884 | } |
27b12023 JFM |
885 | |
886 | /* set the highest alternate setting and | |
887 | * loop until urb submit succeeds */ | |
888 | gspca_input_destroy_urb(gspca_dev); | |
889 | ||
890 | gspca_dev->alt = ep_tb[--alt_idx].alt; | |
891 | alt = -1; | |
63eb9546 | 892 | for (;;) { |
27b12023 JFM |
893 | if (alt != gspca_dev->alt) { |
894 | alt = gspca_dev->alt; | |
6121ca57 | 895 | if (intf->num_altsetting > 1) { |
27b12023 JFM |
896 | ret = usb_set_interface(gspca_dev->dev, |
897 | gspca_dev->iface, | |
898 | alt); | |
899 | if (ret < 0) { | |
4274d84c JFM |
900 | if (ret == -ENOSPC) |
901 | goto retry; /*fixme: ugly*/ | |
27b12023 JFM |
902 | pr_err("set alt %d err %d\n", alt, ret); |
903 | goto out; | |
904 | } | |
905 | } | |
906 | } | |
47aaca96 | 907 | if (!gspca_dev->cam.no_urb_create) { |
27b12023 JFM |
908 | PDEBUG(D_STREAM, "init transfer alt %d", alt); |
909 | ret = create_urbs(gspca_dev, | |
2fe15245 AO |
910 | alt_xfer(&intf->altsetting[alt], xfer, |
911 | gspca_dev->xfer_ep)); | |
47aaca96 JFM |
912 | if (ret < 0) { |
913 | destroy_urbs(gspca_dev); | |
914 | goto out; | |
915 | } | |
db870875 | 916 | } |
63eb9546 | 917 | |
8fe2f1d5 | 918 | /* clear the bulk endpoint */ |
6929dc6b | 919 | if (gspca_dev->cam.bulk) |
8fe2f1d5 | 920 | usb_clear_halt(gspca_dev->dev, |
50e06dee | 921 | gspca_dev->urb[0]->pipe); |
8fe2f1d5 | 922 | |
63eb9546 | 923 | /* start the cam */ |
72ab97ce JFM |
924 | ret = gspca_dev->sd_desc->start(gspca_dev); |
925 | if (ret < 0) { | |
926 | destroy_urbs(gspca_dev); | |
927 | goto out; | |
928 | } | |
63eb9546 | 929 | gspca_dev->streaming = 1; |
82b343b2 | 930 | v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler); |
63eb9546 | 931 | |
dff369aa | 932 | /* some bulk transfers are started by the subdriver */ |
6929dc6b | 933 | if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0) |
51977a8d JFM |
934 | break; |
935 | ||
63eb9546 | 936 | /* submit the URBs */ |
db870875 JFM |
937 | for (n = 0; n < MAX_NURBS; n++) { |
938 | urb = gspca_dev->urb[n]; | |
939 | if (urb == NULL) | |
940 | break; | |
941 | ret = usb_submit_urb(urb, GFP_KERNEL); | |
1f53b0b0 JFM |
942 | if (ret < 0) |
943 | break; | |
63eb9546 JFM |
944 | } |
945 | if (ret >= 0) | |
27b12023 JFM |
946 | break; /* transfer is started */ |
947 | ||
948 | /* something when wrong | |
949 | * stop the webcam and free the transfer resources */ | |
e4dac289 | 950 | gspca_stream_off(gspca_dev); |
4bdf4a83 | 951 | if (ret != -ENOSPC) { |
133a9fe9 JP |
952 | pr_err("usb_submit_urb alt %d err %d\n", |
953 | gspca_dev->alt, ret); | |
1f53b0b0 | 954 | goto out; |
4bdf4a83 | 955 | } |
1f53b0b0 JFM |
956 | |
957 | /* the bandwidth is not wide enough | |
25985edc | 958 | * negotiate or try a lower alternate setting */ |
4274d84c | 959 | retry: |
c93396e1 | 960 | PERR("alt %d - bandwidth not wide enough, trying again", alt); |
1f53b0b0 JFM |
961 | msleep(20); /* wait for kill complete */ |
962 | if (gspca_dev->sd_desc->isoc_nego) { | |
963 | ret = gspca_dev->sd_desc->isoc_nego(gspca_dev); | |
964 | if (ret < 0) | |
965 | goto out; | |
966 | } else { | |
27b12023 JFM |
967 | if (alt_idx <= 0) { |
968 | pr_err("no transfer endpoint found\n"); | |
1f53b0b0 JFM |
969 | ret = -EIO; |
970 | goto out; | |
971 | } | |
ac97ecc8 | 972 | gspca_dev->alt = ep_tb[--alt_idx].alt; |
1f53b0b0 | 973 | } |
63eb9546 JFM |
974 | } |
975 | out: | |
314b3e08 | 976 | gspca_input_create_urb(gspca_dev); |
63eb9546 JFM |
977 | return ret; |
978 | } | |
979 | ||
d43fa32f | 980 | static void gspca_set_default_mode(struct gspca_dev *gspca_dev) |
63eb9546 JFM |
981 | { |
982 | int i; | |
983 | ||
984 | i = gspca_dev->cam.nmodes - 1; /* take the highest mode */ | |
985 | gspca_dev->curr_mode = i; | |
1966bc2a | 986 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i]; |
6a33091f | 987 | |
62bba5dd HV |
988 | /* does nothing if ctrl_handler == NULL */ |
989 | v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler); | |
63eb9546 JFM |
990 | } |
991 | ||
b3f18ec6 AO |
992 | static int wxh_to_mode(struct gspca_dev *gspca_dev, |
993 | int width, int height) | |
994 | { | |
995 | int i; | |
996 | ||
997 | for (i = 0; i < gspca_dev->cam.nmodes; i++) { | |
998 | if (width == gspca_dev->cam.cam_mode[i].width | |
999 | && height == gspca_dev->cam.cam_mode[i].height) | |
1000 | return i; | |
1001 | } | |
1002 | return -EINVAL; | |
1003 | } | |
1004 | ||
9a08e461 | 1005 | static int wxh_to_nearest_mode(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1006 | int width, int height) |
1007 | { | |
1008 | int i; | |
1009 | ||
d43fa32f JFM |
1010 | for (i = gspca_dev->cam.nmodes; --i > 0; ) { |
1011 | if (width >= gspca_dev->cam.cam_mode[i].width | |
1012 | && height >= gspca_dev->cam.cam_mode[i].height) | |
63eb9546 JFM |
1013 | break; |
1014 | } | |
63eb9546 JFM |
1015 | return i; |
1016 | } | |
1017 | ||
63eb9546 JFM |
1018 | /* |
1019 | * search a mode with the right pixel format | |
1020 | */ | |
1021 | static int gspca_get_mode(struct gspca_dev *gspca_dev, | |
1022 | int mode, | |
1023 | int pixfmt) | |
1024 | { | |
1025 | int modeU, modeD; | |
1026 | ||
1027 | modeU = modeD = mode; | |
1028 | while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) { | |
1029 | if (--modeD >= 0) { | |
c2446b3e JFM |
1030 | if (gspca_dev->cam.cam_mode[modeD].pixelformat |
1031 | == pixfmt) | |
63eb9546 JFM |
1032 | return modeD; |
1033 | } | |
1034 | if (++modeU < gspca_dev->cam.nmodes) { | |
c2446b3e JFM |
1035 | if (gspca_dev->cam.cam_mode[modeU].pixelformat |
1036 | == pixfmt) | |
63eb9546 JFM |
1037 | return modeU; |
1038 | } | |
1039 | } | |
1040 | return -EINVAL; | |
1041 | } | |
1042 | ||
af1d9afa | 1043 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
b1c85cc0 HV |
1044 | static int vidioc_g_chip_info(struct file *file, void *priv, |
1045 | struct v4l2_dbg_chip_info *chip) | |
af1d9afa | 1046 | { |
f4c1605a | 1047 | struct gspca_dev *gspca_dev = video_drvdata(file); |
af1d9afa | 1048 | |
8c4ebae4 | 1049 | gspca_dev->usb_err = 0; |
b1c85cc0 HV |
1050 | if (gspca_dev->sd_desc->get_chip_info) |
1051 | return gspca_dev->sd_desc->get_chip_info(gspca_dev, chip); | |
1052 | return chip->match.addr ? -EINVAL : 0; | |
af1d9afa BJ |
1053 | } |
1054 | ||
b1c85cc0 HV |
1055 | static int vidioc_g_register(struct file *file, void *priv, |
1056 | struct v4l2_dbg_register *reg) | |
af1d9afa | 1057 | { |
f4c1605a | 1058 | struct gspca_dev *gspca_dev = video_drvdata(file); |
af1d9afa | 1059 | |
8c4ebae4 | 1060 | gspca_dev->usb_err = 0; |
b1c85cc0 | 1061 | return gspca_dev->sd_desc->get_register(gspca_dev, reg); |
af1d9afa | 1062 | } |
af1d9afa | 1063 | |
b1c85cc0 HV |
1064 | static int vidioc_s_register(struct file *file, void *priv, |
1065 | const struct v4l2_dbg_register *reg) | |
af1d9afa | 1066 | { |
f4c1605a | 1067 | struct gspca_dev *gspca_dev = video_drvdata(file); |
af1d9afa | 1068 | |
8c4ebae4 | 1069 | gspca_dev->usb_err = 0; |
b1c85cc0 | 1070 | return gspca_dev->sd_desc->set_register(gspca_dev, reg); |
af1d9afa | 1071 | } |
b1c85cc0 | 1072 | #endif |
af1d9afa | 1073 | |
e078770a | 1074 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
1075 | struct v4l2_fmtdesc *fmtdesc) |
1076 | { | |
f4c1605a | 1077 | struct gspca_dev *gspca_dev = video_drvdata(file); |
6a7eba24 | 1078 | int i, j, index; |
63eb9546 JFM |
1079 | __u32 fmt_tb[8]; |
1080 | ||
63eb9546 JFM |
1081 | /* give an index to each format */ |
1082 | index = 0; | |
1083 | j = 0; | |
1084 | for (i = gspca_dev->cam.nmodes; --i >= 0; ) { | |
c2446b3e | 1085 | fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat; |
63eb9546 JFM |
1086 | j = 0; |
1087 | for (;;) { | |
1088 | if (fmt_tb[j] == fmt_tb[index]) | |
1089 | break; | |
1090 | j++; | |
1091 | } | |
1092 | if (j == index) { | |
1093 | if (fmtdesc->index == index) | |
1094 | break; /* new format */ | |
1095 | index++; | |
80297125 | 1096 | if (index >= ARRAY_SIZE(fmt_tb)) |
63eb9546 JFM |
1097 | return -EINVAL; |
1098 | } | |
1099 | } | |
1100 | if (i < 0) | |
1101 | return -EINVAL; /* no more format */ | |
1102 | ||
63eb9546 | 1103 | fmtdesc->pixelformat = fmt_tb[index]; |
b796fb6e JFM |
1104 | if (gspca_dev->cam.cam_mode[i].sizeimage < |
1105 | gspca_dev->cam.cam_mode[i].width * | |
1106 | gspca_dev->cam.cam_mode[i].height) | |
63eb9546 JFM |
1107 | fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED; |
1108 | fmtdesc->description[0] = fmtdesc->pixelformat & 0xff; | |
1109 | fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff; | |
1110 | fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff; | |
1111 | fmtdesc->description[3] = fmtdesc->pixelformat >> 24; | |
1112 | fmtdesc->description[4] = '\0'; | |
1113 | return 0; | |
1114 | } | |
1115 | ||
e078770a | 1116 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
1117 | struct v4l2_format *fmt) |
1118 | { | |
f4c1605a | 1119 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 | 1120 | |
1966bc2a | 1121 | fmt->fmt.pix = gspca_dev->pixfmt; |
d52e2381 LP |
1122 | /* some drivers use priv internally, zero it before giving it back to |
1123 | the core */ | |
ac3322b0 | 1124 | fmt->fmt.pix.priv = 0; |
63eb9546 JFM |
1125 | return 0; |
1126 | } | |
1127 | ||
e078770a | 1128 | static int try_fmt_vid_cap(struct gspca_dev *gspca_dev, |
63eb9546 JFM |
1129 | struct v4l2_format *fmt) |
1130 | { | |
24c530b4 | 1131 | int w, h, mode, mode2; |
63eb9546 | 1132 | |
4aa0d037 JFM |
1133 | w = fmt->fmt.pix.width; |
1134 | h = fmt->fmt.pix.height; | |
d43fa32f | 1135 | |
c93396e1 TK |
1136 | PDEBUG_MODE(gspca_dev, D_CONF, "try fmt cap", |
1137 | fmt->fmt.pix.pixelformat, w, h); | |
1138 | ||
9a08e461 AO |
1139 | /* search the nearest mode for width and height */ |
1140 | mode = wxh_to_nearest_mode(gspca_dev, w, h); | |
63eb9546 JFM |
1141 | |
1142 | /* OK if right palette */ | |
c2446b3e JFM |
1143 | if (gspca_dev->cam.cam_mode[mode].pixelformat |
1144 | != fmt->fmt.pix.pixelformat) { | |
63eb9546 JFM |
1145 | |
1146 | /* else, search the closest mode with the same pixel format */ | |
1147 | mode2 = gspca_get_mode(gspca_dev, mode, | |
1148 | fmt->fmt.pix.pixelformat); | |
c2446b3e | 1149 | if (mode2 >= 0) |
63eb9546 | 1150 | mode = mode2; |
63eb9546 | 1151 | } |
ac3322b0 | 1152 | fmt->fmt.pix = gspca_dev->cam.cam_mode[mode]; |
7d687af4 OZ |
1153 | if (gspca_dev->sd_desc->try_fmt) { |
1154 | /* pass original resolution to subdriver try_fmt */ | |
1155 | fmt->fmt.pix.width = w; | |
1156 | fmt->fmt.pix.height = h; | |
1157 | gspca_dev->sd_desc->try_fmt(gspca_dev, fmt); | |
1158 | } | |
d52e2381 LP |
1159 | /* some drivers use priv internally, zero it before giving it back to |
1160 | the core */ | |
ac3322b0 | 1161 | fmt->fmt.pix.priv = 0; |
63eb9546 JFM |
1162 | return mode; /* used when s_fmt */ |
1163 | } | |
1164 | ||
e078770a | 1165 | static int vidioc_try_fmt_vid_cap(struct file *file, |
63eb9546 JFM |
1166 | void *priv, |
1167 | struct v4l2_format *fmt) | |
1168 | { | |
f4c1605a | 1169 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 JFM |
1170 | int ret; |
1171 | ||
e078770a | 1172 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
1173 | if (ret < 0) |
1174 | return ret; | |
1175 | return 0; | |
1176 | } | |
1177 | ||
e078770a | 1178 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
63eb9546 JFM |
1179 | struct v4l2_format *fmt) |
1180 | { | |
f4c1605a | 1181 | struct gspca_dev *gspca_dev = video_drvdata(file); |
d43fa32f | 1182 | int ret; |
63eb9546 | 1183 | |
e2997a72 HG |
1184 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1185 | return -ERESTARTSYS; | |
d43fa32f | 1186 | |
e078770a | 1187 | ret = try_fmt_vid_cap(gspca_dev, fmt); |
63eb9546 JFM |
1188 | if (ret < 0) |
1189 | goto out; | |
1190 | ||
d43fa32f JFM |
1191 | if (gspca_dev->nframes != 0 |
1192 | && fmt->fmt.pix.sizeimage > gspca_dev->frsz) { | |
1193 | ret = -EINVAL; | |
1194 | goto out; | |
1195 | } | |
1196 | ||
d43fa32f JFM |
1197 | if (gspca_dev->streaming) { |
1198 | ret = -EBUSY; | |
1199 | goto out; | |
e2997a72 | 1200 | } |
63eb9546 | 1201 | gspca_dev->curr_mode = ret; |
7d687af4 OZ |
1202 | if (gspca_dev->sd_desc->try_fmt) |
1203 | /* subdriver try_fmt can modify format parameters */ | |
1204 | gspca_dev->pixfmt = fmt->fmt.pix; | |
1205 | else | |
1206 | gspca_dev->pixfmt = gspca_dev->cam.cam_mode[ret]; | |
d43fa32f | 1207 | |
d43fa32f | 1208 | ret = 0; |
63eb9546 JFM |
1209 | out: |
1210 | mutex_unlock(&gspca_dev->queue_lock); | |
1211 | return ret; | |
1212 | } | |
1213 | ||
11c635a2 HG |
1214 | static int vidioc_enum_framesizes(struct file *file, void *priv, |
1215 | struct v4l2_frmsizeenum *fsize) | |
1216 | { | |
f4c1605a | 1217 | struct gspca_dev *gspca_dev = video_drvdata(file); |
11c635a2 HG |
1218 | int i; |
1219 | __u32 index = 0; | |
1220 | ||
7d687af4 OZ |
1221 | if (gspca_dev->sd_desc->enum_framesizes) |
1222 | return gspca_dev->sd_desc->enum_framesizes(gspca_dev, fsize); | |
1223 | ||
11c635a2 HG |
1224 | for (i = 0; i < gspca_dev->cam.nmodes; i++) { |
1225 | if (fsize->pixel_format != | |
1226 | gspca_dev->cam.cam_mode[i].pixelformat) | |
1227 | continue; | |
1228 | ||
1229 | if (fsize->index == index) { | |
1230 | fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; | |
1231 | fsize->discrete.width = | |
1232 | gspca_dev->cam.cam_mode[i].width; | |
1233 | fsize->discrete.height = | |
1234 | gspca_dev->cam.cam_mode[i].height; | |
1235 | return 0; | |
1236 | } | |
1237 | index++; | |
1238 | } | |
1239 | ||
1240 | return -EINVAL; | |
1241 | } | |
1242 | ||
28ffe77f AO |
1243 | static int vidioc_enum_frameintervals(struct file *filp, void *priv, |
1244 | struct v4l2_frmivalenum *fival) | |
1245 | { | |
f4c1605a | 1246 | struct gspca_dev *gspca_dev = video_drvdata(filp); |
b3f18ec6 | 1247 | int mode; |
28ffe77f AO |
1248 | __u32 i; |
1249 | ||
b3f18ec6 AO |
1250 | mode = wxh_to_mode(gspca_dev, fival->width, fival->height); |
1251 | if (mode < 0) | |
1252 | return -EINVAL; | |
1253 | ||
28ffe77f AO |
1254 | if (gspca_dev->cam.mode_framerates == NULL || |
1255 | gspca_dev->cam.mode_framerates[mode].nrates == 0) | |
1256 | return -EINVAL; | |
1257 | ||
1258 | if (fival->pixel_format != | |
1259 | gspca_dev->cam.cam_mode[mode].pixelformat) | |
1260 | return -EINVAL; | |
1261 | ||
1262 | for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) { | |
1263 | if (fival->index == i) { | |
c0925ba3 | 1264 | fival->type = V4L2_FRMIVAL_TYPE_DISCRETE; |
28ffe77f AO |
1265 | fival->discrete.numerator = 1; |
1266 | fival->discrete.denominator = | |
1267 | gspca_dev->cam.mode_framerates[mode].rates[i]; | |
1268 | return 0; | |
1269 | } | |
1270 | } | |
1271 | ||
1272 | return -EINVAL; | |
1273 | } | |
1274 | ||
a3d6e8cc | 1275 | static void gspca_release(struct v4l2_device *v4l2_device) |
6b060ffe | 1276 | { |
a3d6e8cc HV |
1277 | struct gspca_dev *gspca_dev = |
1278 | container_of(v4l2_device, struct gspca_dev, v4l2_dev); | |
6b060ffe | 1279 | |
62bba5dd | 1280 | v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler); |
2333565d | 1281 | v4l2_device_unregister(&gspca_dev->v4l2_dev); |
6b060ffe FZ |
1282 | kfree(gspca_dev->usb_buf); |
1283 | kfree(gspca_dev); | |
1284 | } | |
1285 | ||
bec43661 | 1286 | static int dev_open(struct file *file) |
63eb9546 | 1287 | { |
f4c1605a | 1288 | struct gspca_dev *gspca_dev = video_drvdata(file); |
b563a0d0 | 1289 | int ret; |
63eb9546 | 1290 | |
0d07e240 | 1291 | PDEBUG(D_STREAM, "[%s] open", current->comm); |
5c4fa002 JFM |
1292 | |
1293 | /* protect the subdriver against rmmod */ | |
7f6eb118 HG |
1294 | if (!try_module_get(gspca_dev->module)) |
1295 | return -ENODEV; | |
6b060ffe | 1296 | |
b563a0d0 AK |
1297 | ret = v4l2_fh_open(file); |
1298 | if (ret) | |
1299 | module_put(gspca_dev->module); | |
1300 | return ret; | |
63eb9546 JFM |
1301 | } |
1302 | ||
bec43661 | 1303 | static int dev_close(struct file *file) |
63eb9546 | 1304 | { |
f4c1605a | 1305 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 | 1306 | |
0d07e240 | 1307 | PDEBUG(D_STREAM, "[%s] close", current->comm); |
a3d6e8cc HV |
1308 | |
1309 | /* Needed for gspca_stream_off, always lock before queue_lock! */ | |
1310 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
e2997a72 | 1311 | return -ERESTARTSYS; |
e2997a72 | 1312 | |
a3d6e8cc HV |
1313 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) { |
1314 | mutex_unlock(&gspca_dev->usb_lock); | |
1315 | return -ERESTARTSYS; | |
1316 | } | |
1317 | ||
5b77ae77 | 1318 | /* if the file did the capture, free the streaming resources */ |
4aa0d037 | 1319 | if (gspca_dev->capt_file == file) { |
a3cc74d4 | 1320 | if (gspca_dev->streaming) |
a1e8288b | 1321 | gspca_stream_off(gspca_dev); |
4aa0d037 | 1322 | frame_free(gspca_dev); |
4aa0d037 | 1323 | } |
5c4fa002 | 1324 | module_put(gspca_dev->module); |
63eb9546 | 1325 | mutex_unlock(&gspca_dev->queue_lock); |
a3d6e8cc | 1326 | mutex_unlock(&gspca_dev->usb_lock); |
6b060ffe | 1327 | |
d43fa32f | 1328 | PDEBUG(D_STREAM, "close done"); |
6b060ffe | 1329 | |
2333565d | 1330 | return v4l2_fh_release(file); |
63eb9546 JFM |
1331 | } |
1332 | ||
1333 | static int vidioc_querycap(struct file *file, void *priv, | |
1334 | struct v4l2_capability *cap) | |
1335 | { | |
f4c1605a | 1336 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 | 1337 | |
e7d712cc | 1338 | strlcpy((char *) cap->driver, gspca_dev->sd_desc->name, |
d8518590 | 1339 | sizeof cap->driver); |
c6edaf16 | 1340 | if (gspca_dev->dev->product != NULL) { |
e7d712cc | 1341 | strlcpy((char *) cap->card, gspca_dev->dev->product, |
c6edaf16 JFM |
1342 | sizeof cap->card); |
1343 | } else { | |
d8518590 | 1344 | snprintf((char *) cap->card, sizeof cap->card, |
c6edaf16 JFM |
1345 | "USB Camera (%04x:%04x)", |
1346 | le16_to_cpu(gspca_dev->dev->descriptor.idVendor), | |
1347 | le16_to_cpu(gspca_dev->dev->descriptor.idProduct)); | |
1348 | } | |
d8518590 JFM |
1349 | usb_make_path(gspca_dev->dev, (char *) cap->bus_info, |
1350 | sizeof(cap->bus_info)); | |
cc7b6f25 | 1351 | cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
63eb9546 JFM |
1352 | | V4L2_CAP_STREAMING |
1353 | | V4L2_CAP_READWRITE; | |
cc7b6f25 | 1354 | cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; |
a3d6e8cc | 1355 | return 0; |
63eb9546 JFM |
1356 | } |
1357 | ||
63eb9546 JFM |
1358 | static int vidioc_enum_input(struct file *file, void *priv, |
1359 | struct v4l2_input *input) | |
1360 | { | |
f4c1605a | 1361 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 JFM |
1362 | |
1363 | if (input->index != 0) | |
1364 | return -EINVAL; | |
63eb9546 | 1365 | input->type = V4L2_INPUT_TYPE_CAMERA; |
dfa76fa2 | 1366 | input->status = gspca_dev->cam.input_flags; |
e7d712cc | 1367 | strlcpy(input->name, gspca_dev->sd_desc->name, |
63eb9546 JFM |
1368 | sizeof input->name); |
1369 | return 0; | |
1370 | } | |
1371 | ||
1372 | static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) | |
1373 | { | |
1374 | *i = 0; | |
1375 | return 0; | |
1376 | } | |
1377 | ||
1378 | static int vidioc_s_input(struct file *file, void *priv, unsigned int i) | |
1379 | { | |
1380 | if (i > 0) | |
1381 | return -EINVAL; | |
1382 | return (0); | |
1383 | } | |
1384 | ||
1385 | static int vidioc_reqbufs(struct file *file, void *priv, | |
1386 | struct v4l2_requestbuffers *rb) | |
1387 | { | |
f4c1605a | 1388 | struct gspca_dev *gspca_dev = video_drvdata(file); |
832d0a91 | 1389 | int i, ret = 0, streaming; |
63eb9546 | 1390 | |
a2ba6f27 JFM |
1391 | i = rb->memory; /* (avoid compilation warning) */ |
1392 | switch (i) { | |
5b77ae77 | 1393 | case GSPCA_MEMORY_READ: /* (internal call) */ |
d43fa32f | 1394 | case V4L2_MEMORY_MMAP: |
d43fa32f | 1395 | case V4L2_MEMORY_USERPTR: |
6a7eba24 | 1396 | break; |
d43fa32f | 1397 | default: |
63eb9546 | 1398 | return -EINVAL; |
d43fa32f | 1399 | } |
e2997a72 HG |
1400 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1401 | return -ERESTARTSYS; | |
d43fa32f | 1402 | |
5b77ae77 | 1403 | if (gspca_dev->memory != GSPCA_MEMORY_NO |
ce5610bc | 1404 | && gspca_dev->memory != GSPCA_MEMORY_READ |
5b77ae77 | 1405 | && gspca_dev->memory != rb->memory) { |
4aa0d037 JFM |
1406 | ret = -EBUSY; |
1407 | goto out; | |
1408 | } | |
d43fa32f | 1409 | |
5b77ae77 JFM |
1410 | /* only one file may do the capture */ |
1411 | if (gspca_dev->capt_file != NULL | |
1412 | && gspca_dev->capt_file != file) { | |
1413 | ret = -EBUSY; | |
1414 | goto out; | |
1415 | } | |
1416 | ||
1417 | /* if allocated, the buffers must not be mapped */ | |
1418 | for (i = 0; i < gspca_dev->nframes; i++) { | |
1419 | if (gspca_dev->frame[i].vma_use_count) { | |
ac0d6df6 JFM |
1420 | ret = -EBUSY; |
1421 | goto out; | |
1422 | } | |
5b77ae77 JFM |
1423 | } |
1424 | ||
1425 | /* stop streaming */ | |
832d0a91 JFM |
1426 | streaming = gspca_dev->streaming; |
1427 | if (streaming) { | |
5b77ae77 | 1428 | gspca_stream_off(gspca_dev); |
59929cef JFM |
1429 | |
1430 | /* Don't restart the stream when switching from read | |
1431 | * to mmap mode */ | |
1432 | if (gspca_dev->memory == GSPCA_MEMORY_READ) | |
1433 | streaming = 0; | |
5b77ae77 JFM |
1434 | } |
1435 | ||
1436 | /* free the previous allocated buffers, if any */ | |
d642de2e | 1437 | if (gspca_dev->nframes != 0) |
5b77ae77 | 1438 | frame_free(gspca_dev); |
5b77ae77 JFM |
1439 | if (rb->count == 0) /* unrequest */ |
1440 | goto out; | |
d642de2e | 1441 | ret = frame_alloc(gspca_dev, file, rb->memory, rb->count); |
5b77ae77 JFM |
1442 | if (ret == 0) { |
1443 | rb->count = gspca_dev->nframes; | |
832d0a91 JFM |
1444 | if (streaming) |
1445 | ret = gspca_init_transfer(gspca_dev); | |
4aa0d037 JFM |
1446 | } |
1447 | out: | |
63eb9546 JFM |
1448 | mutex_unlock(&gspca_dev->queue_lock); |
1449 | PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count); | |
1450 | return ret; | |
1451 | } | |
1452 | ||
1453 | static int vidioc_querybuf(struct file *file, void *priv, | |
1454 | struct v4l2_buffer *v4l2_buf) | |
1455 | { | |
f4c1605a | 1456 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 JFM |
1457 | struct gspca_frame *frame; |
1458 | ||
3a70c3fb | 1459 | if (v4l2_buf->index >= gspca_dev->nframes) |
63eb9546 JFM |
1460 | return -EINVAL; |
1461 | ||
1462 | frame = &gspca_dev->frame[v4l2_buf->index]; | |
1463 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1464 | return 0; | |
1465 | } | |
1466 | ||
1467 | static int vidioc_streamon(struct file *file, void *priv, | |
1468 | enum v4l2_buf_type buf_type) | |
1469 | { | |
f4c1605a | 1470 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 JFM |
1471 | int ret; |
1472 | ||
63eb9546 JFM |
1473 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1474 | return -EINVAL; | |
e2997a72 HG |
1475 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1476 | return -ERESTARTSYS; | |
090264e5 | 1477 | |
18bf99aa JFM |
1478 | /* check the capture file */ |
1479 | if (gspca_dev->capt_file != file) { | |
1480 | ret = -EBUSY; | |
1481 | goto out; | |
1482 | } | |
1483 | ||
1edabe71 JFM |
1484 | if (gspca_dev->nframes == 0 |
1485 | || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) { | |
63eb9546 JFM |
1486 | ret = -EINVAL; |
1487 | goto out; | |
1488 | } | |
1489 | if (!gspca_dev->streaming) { | |
1490 | ret = gspca_init_transfer(gspca_dev); | |
1491 | if (ret < 0) | |
1492 | goto out; | |
1493 | } | |
1966bc2a OZ |
1494 | PDEBUG_MODE(gspca_dev, D_STREAM, "stream on OK", |
1495 | gspca_dev->pixfmt.pixelformat, | |
1496 | gspca_dev->pixfmt.width, gspca_dev->pixfmt.height); | |
e2997a72 | 1497 | ret = 0; |
63eb9546 JFM |
1498 | out: |
1499 | mutex_unlock(&gspca_dev->queue_lock); | |
1500 | return ret; | |
1501 | } | |
1502 | ||
1503 | static int vidioc_streamoff(struct file *file, void *priv, | |
1504 | enum v4l2_buf_type buf_type) | |
1505 | { | |
f4c1605a | 1506 | struct gspca_dev *gspca_dev = video_drvdata(file); |
af05ef01 | 1507 | int i, ret; |
63eb9546 | 1508 | |
63eb9546 JFM |
1509 | if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
1510 | return -EINVAL; | |
4e770f76 | 1511 | |
4aa0d037 JFM |
1512 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1513 | return -ERESTARTSYS; | |
5b77ae77 | 1514 | |
4e770f76 HG |
1515 | if (!gspca_dev->streaming) { |
1516 | ret = 0; | |
1517 | goto out; | |
1518 | } | |
1519 | ||
18bf99aa JFM |
1520 | /* check the capture file */ |
1521 | if (gspca_dev->capt_file != file) { | |
1522 | ret = -EBUSY; | |
1523 | goto out; | |
1524 | } | |
1525 | ||
5b77ae77 | 1526 | /* stop streaming */ |
4aa0d037 | 1527 | gspca_stream_off(gspca_dev); |
0d0ae15d HG |
1528 | /* In case another thread is waiting in dqbuf */ |
1529 | wake_up_interruptible(&gspca_dev->wq); | |
5b77ae77 | 1530 | |
f7059eaa | 1531 | /* empty the transfer queues */ |
af05ef01 HG |
1532 | for (i = 0; i < gspca_dev->nframes; i++) |
1533 | gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS; | |
f7059eaa JFM |
1534 | atomic_set(&gspca_dev->fr_q, 0); |
1535 | atomic_set(&gspca_dev->fr_i, 0); | |
1536 | gspca_dev->fr_o = 0; | |
5b77ae77 | 1537 | ret = 0; |
4aa0d037 JFM |
1538 | out: |
1539 | mutex_unlock(&gspca_dev->queue_lock); | |
1540 | return ret; | |
63eb9546 JFM |
1541 | } |
1542 | ||
1543 | static int vidioc_g_jpegcomp(struct file *file, void *priv, | |
1544 | struct v4l2_jpegcompression *jpegcomp) | |
1545 | { | |
f4c1605a | 1546 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 | 1547 | |
8c4ebae4 | 1548 | gspca_dev->usb_err = 0; |
a3d6e8cc | 1549 | return gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp); |
63eb9546 JFM |
1550 | } |
1551 | ||
1552 | static int vidioc_s_jpegcomp(struct file *file, void *priv, | |
d88aab53 | 1553 | const struct v4l2_jpegcompression *jpegcomp) |
63eb9546 | 1554 | { |
f4c1605a | 1555 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 | 1556 | |
8c4ebae4 | 1557 | gspca_dev->usb_err = 0; |
a3d6e8cc | 1558 | return gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp); |
63eb9546 JFM |
1559 | } |
1560 | ||
1561 | static int vidioc_g_parm(struct file *filp, void *priv, | |
1562 | struct v4l2_streamparm *parm) | |
1563 | { | |
f4c1605a | 1564 | struct gspca_dev *gspca_dev = video_drvdata(filp); |
63eb9546 | 1565 | |
63eb9546 | 1566 | parm->parm.capture.readbuffers = gspca_dev->nbufread; |
627a5ef7 JP |
1567 | |
1568 | if (gspca_dev->sd_desc->get_streamparm) { | |
a3d6e8cc HV |
1569 | gspca_dev->usb_err = 0; |
1570 | gspca_dev->sd_desc->get_streamparm(gspca_dev, parm); | |
1571 | return gspca_dev->usb_err; | |
627a5ef7 | 1572 | } |
63eb9546 JFM |
1573 | return 0; |
1574 | } | |
1575 | ||
1576 | static int vidioc_s_parm(struct file *filp, void *priv, | |
1577 | struct v4l2_streamparm *parm) | |
1578 | { | |
f4c1605a | 1579 | struct gspca_dev *gspca_dev = video_drvdata(filp); |
c7e5a726 | 1580 | unsigned int n; |
63eb9546 | 1581 | |
63eb9546 | 1582 | n = parm->parm.capture.readbuffers; |
f7059eaa | 1583 | if (n == 0 || n >= GSPCA_MAX_FRAMES) |
63eb9546 JFM |
1584 | parm->parm.capture.readbuffers = gspca_dev->nbufread; |
1585 | else | |
1586 | gspca_dev->nbufread = n; | |
627a5ef7 JP |
1587 | |
1588 | if (gspca_dev->sd_desc->set_streamparm) { | |
a3d6e8cc HV |
1589 | gspca_dev->usb_err = 0; |
1590 | gspca_dev->sd_desc->set_streamparm(gspca_dev, parm); | |
1591 | return gspca_dev->usb_err; | |
627a5ef7 JP |
1592 | } |
1593 | ||
63eb9546 JFM |
1594 | return 0; |
1595 | } | |
1596 | ||
63eb9546 JFM |
1597 | static int dev_mmap(struct file *file, struct vm_area_struct *vma) |
1598 | { | |
f4c1605a | 1599 | struct gspca_dev *gspca_dev = video_drvdata(file); |
efab8211 | 1600 | struct gspca_frame *frame; |
63eb9546 JFM |
1601 | struct page *page; |
1602 | unsigned long addr, start, size; | |
1603 | int i, ret; | |
63eb9546 JFM |
1604 | |
1605 | start = vma->vm_start; | |
1606 | size = vma->vm_end - vma->vm_start; | |
1607 | PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size); | |
1608 | ||
e2997a72 HG |
1609 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1610 | return -ERESTARTSYS; | |
4aa0d037 JFM |
1611 | if (gspca_dev->capt_file != file) { |
1612 | ret = -EINVAL; | |
1613 | goto out; | |
63eb9546 JFM |
1614 | } |
1615 | ||
efab8211 | 1616 | frame = NULL; |
63eb9546 JFM |
1617 | for (i = 0; i < gspca_dev->nframes; ++i) { |
1618 | if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) { | |
1619 | PDEBUG(D_STREAM, "mmap bad memory type"); | |
1620 | break; | |
1621 | } | |
1622 | if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT) | |
1623 | == vma->vm_pgoff) { | |
1624 | frame = &gspca_dev->frame[i]; | |
1625 | break; | |
1626 | } | |
1627 | } | |
efab8211 | 1628 | if (frame == NULL) { |
63eb9546 JFM |
1629 | PDEBUG(D_STREAM, "mmap no frame buffer found"); |
1630 | ret = -EINVAL; | |
4aa0d037 | 1631 | goto out; |
63eb9546 | 1632 | } |
38bff697 | 1633 | if (size != frame->v4l2_buf.length) { |
63eb9546 JFM |
1634 | PDEBUG(D_STREAM, "mmap bad size"); |
1635 | ret = -EINVAL; | |
4aa0d037 | 1636 | goto out; |
63eb9546 JFM |
1637 | } |
1638 | ||
1639 | /* | |
1640 | * - VM_IO marks the area as being a mmaped region for I/O to a | |
1641 | * device. It also prevents the region from being core dumped. | |
1642 | */ | |
1643 | vma->vm_flags |= VM_IO; | |
1644 | ||
1645 | addr = (unsigned long) frame->data; | |
1646 | while (size > 0) { | |
1647 | page = vmalloc_to_page((void *) addr); | |
1648 | ret = vm_insert_page(vma, start, page); | |
1649 | if (ret < 0) | |
4aa0d037 | 1650 | goto out; |
63eb9546 JFM |
1651 | start += PAGE_SIZE; |
1652 | addr += PAGE_SIZE; | |
1653 | size -= PAGE_SIZE; | |
1654 | } | |
1655 | ||
d50e257e | 1656 | vma->vm_ops = &gspca_vm_ops; |
63eb9546 JFM |
1657 | vma->vm_private_data = frame; |
1658 | gspca_vm_open(vma); | |
e2997a72 | 1659 | ret = 0; |
4aa0d037 | 1660 | out: |
63eb9546 JFM |
1661 | mutex_unlock(&gspca_dev->queue_lock); |
1662 | return ret; | |
1663 | } | |
1664 | ||
27074efa HG |
1665 | static int frame_ready_nolock(struct gspca_dev *gspca_dev, struct file *file, |
1666 | enum v4l2_memory memory) | |
1667 | { | |
1668 | if (!gspca_dev->present) | |
1669 | return -ENODEV; | |
1670 | if (gspca_dev->capt_file != file || gspca_dev->memory != memory || | |
1671 | !gspca_dev->streaming) | |
1672 | return -EINVAL; | |
1673 | ||
1674 | /* check if a frame is ready */ | |
1675 | return gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i); | |
1676 | } | |
1677 | ||
1678 | static int frame_ready(struct gspca_dev *gspca_dev, struct file *file, | |
1679 | enum v4l2_memory memory) | |
1680 | { | |
1681 | int ret; | |
1682 | ||
1683 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1684 | return -ERESTARTSYS; | |
1685 | ret = frame_ready_nolock(gspca_dev, file, memory); | |
1686 | mutex_unlock(&gspca_dev->queue_lock); | |
1687 | return ret; | |
1688 | } | |
1689 | ||
63eb9546 | 1690 | /* |
27074efa | 1691 | * dequeue a video buffer |
63eb9546 | 1692 | * |
27074efa | 1693 | * If nonblock_ing is false, block until a buffer is available. |
63eb9546 | 1694 | */ |
27074efa HG |
1695 | static int vidioc_dqbuf(struct file *file, void *priv, |
1696 | struct v4l2_buffer *v4l2_buf) | |
63eb9546 | 1697 | { |
f4c1605a | 1698 | struct gspca_dev *gspca_dev = video_drvdata(file); |
27074efa HG |
1699 | struct gspca_frame *frame; |
1700 | int i, j, ret; | |
63eb9546 | 1701 | |
27074efa HG |
1702 | PDEBUG(D_FRAM, "dqbuf"); |
1703 | ||
1704 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1705 | return -ERESTARTSYS; | |
1706 | ||
1707 | for (;;) { | |
1708 | ret = frame_ready_nolock(gspca_dev, file, v4l2_buf->memory); | |
1709 | if (ret < 0) | |
1710 | goto out; | |
1711 | if (ret > 0) | |
1712 | break; | |
1713 | ||
1714 | mutex_unlock(&gspca_dev->queue_lock); | |
1715 | ||
1716 | if (file->f_flags & O_NONBLOCK) | |
181b704f HG |
1717 | return -EAGAIN; |
1718 | ||
1719 | /* wait till a frame is ready */ | |
4aa0d037 | 1720 | ret = wait_event_interruptible_timeout(gspca_dev->wq, |
27074efa | 1721 | frame_ready(gspca_dev, file, v4l2_buf->memory), |
181b704f HG |
1722 | msecs_to_jiffies(3000)); |
1723 | if (ret < 0) | |
1724 | return ret; | |
27074efa | 1725 | if (ret == 0) |
e2997a72 | 1726 | return -EIO; |
27074efa HG |
1727 | |
1728 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) | |
1729 | return -ERESTARTSYS; | |
63eb9546 | 1730 | } |
181b704f | 1731 | |
27074efa HG |
1732 | i = gspca_dev->fr_o; |
1733 | j = gspca_dev->fr_queue[i]; | |
1734 | frame = &gspca_dev->frame[j]; | |
1735 | ||
f7059eaa | 1736 | gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES; |
e2997a72 | 1737 | |
4a82bc60 HG |
1738 | frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; |
1739 | memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); | |
1740 | PDEBUG(D_FRAM, "dqbuf %d", j); | |
1741 | ret = 0; | |
1742 | ||
ac0d6df6 | 1743 | if (gspca_dev->memory == V4L2_MEMORY_USERPTR) { |
c6eb8eaf | 1744 | if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr, |
ac0d6df6 JFM |
1745 | frame->data, |
1746 | frame->v4l2_buf.bytesused)) { | |
c93396e1 | 1747 | PERR("dqbuf cp to user failed"); |
ac0d6df6 | 1748 | ret = -EFAULT; |
ac0d6df6 JFM |
1749 | } |
1750 | } | |
4aa0d037 | 1751 | out: |
27074efa | 1752 | mutex_unlock(&gspca_dev->queue_lock); |
a3d6e8cc HV |
1753 | |
1754 | if (ret == 0 && gspca_dev->sd_desc->dq_callback) { | |
1755 | mutex_lock(&gspca_dev->usb_lock); | |
1756 | gspca_dev->usb_err = 0; | |
1757 | if (gspca_dev->present) | |
1758 | gspca_dev->sd_desc->dq_callback(gspca_dev); | |
1759 | mutex_unlock(&gspca_dev->usb_lock); | |
1760 | } | |
1761 | ||
63eb9546 JFM |
1762 | return ret; |
1763 | } | |
1764 | ||
1765 | /* | |
1766 | * queue a video buffer | |
1767 | * | |
1768 | * Attempting to queue a buffer that has already been | |
1769 | * queued will return -EINVAL. | |
1770 | */ | |
1771 | static int vidioc_qbuf(struct file *file, void *priv, | |
1772 | struct v4l2_buffer *v4l2_buf) | |
1773 | { | |
f4c1605a | 1774 | struct gspca_dev *gspca_dev = video_drvdata(file); |
63eb9546 JFM |
1775 | struct gspca_frame *frame; |
1776 | int i, index, ret; | |
1777 | ||
1778 | PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index); | |
63eb9546 | 1779 | |
5b77ae77 JFM |
1780 | if (mutex_lock_interruptible(&gspca_dev->queue_lock)) |
1781 | return -ERESTARTSYS; | |
1782 | ||
63eb9546 JFM |
1783 | index = v4l2_buf->index; |
1784 | if ((unsigned) index >= gspca_dev->nframes) { | |
d43fa32f | 1785 | PDEBUG(D_FRAM, |
63eb9546 | 1786 | "qbuf idx %d >= %d", index, gspca_dev->nframes); |
5b77ae77 JFM |
1787 | ret = -EINVAL; |
1788 | goto out; | |
63eb9546 | 1789 | } |
5b77ae77 | 1790 | if (v4l2_buf->memory != gspca_dev->memory) { |
d43fa32f | 1791 | PDEBUG(D_FRAM, "qbuf bad memory type"); |
5b77ae77 JFM |
1792 | ret = -EINVAL; |
1793 | goto out; | |
63eb9546 | 1794 | } |
e2997a72 | 1795 | |
5b77ae77 | 1796 | frame = &gspca_dev->frame[index]; |
d43fa32f JFM |
1797 | if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) { |
1798 | PDEBUG(D_FRAM, "qbuf bad state"); | |
63eb9546 JFM |
1799 | ret = -EINVAL; |
1800 | goto out; | |
1801 | } | |
1802 | ||
1803 | frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED; | |
63eb9546 | 1804 | |
d43fa32f | 1805 | if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) { |
63eb9546 JFM |
1806 | frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr; |
1807 | frame->v4l2_buf.length = v4l2_buf->length; | |
1808 | } | |
1809 | ||
1810 | /* put the buffer in the 'queued' queue */ | |
f7059eaa | 1811 | i = atomic_read(&gspca_dev->fr_q); |
63eb9546 | 1812 | gspca_dev->fr_queue[i] = index; |
f7059eaa | 1813 | atomic_set(&gspca_dev->fr_q, (i + 1) % GSPCA_MAX_FRAMES); |
63eb9546 JFM |
1814 | |
1815 | v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED; | |
1816 | v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE; | |
1817 | ret = 0; | |
1818 | out: | |
1819 | mutex_unlock(&gspca_dev->queue_lock); | |
1820 | return ret; | |
1821 | } | |
1822 | ||
d43fa32f JFM |
1823 | /* |
1824 | * allocate the resources for read() | |
1825 | */ | |
1826 | static int read_alloc(struct gspca_dev *gspca_dev, | |
1827 | struct file *file) | |
63eb9546 | 1828 | { |
63eb9546 | 1829 | struct v4l2_buffer v4l2_buf; |
d43fa32f | 1830 | int i, ret; |
63eb9546 | 1831 | |
d43fa32f | 1832 | PDEBUG(D_STREAM, "read alloc"); |
a3d6e8cc HV |
1833 | |
1834 | if (mutex_lock_interruptible(&gspca_dev->usb_lock)) | |
1835 | return -ERESTARTSYS; | |
1836 | ||
63eb9546 JFM |
1837 | if (gspca_dev->nframes == 0) { |
1838 | struct v4l2_requestbuffers rb; | |
1839 | ||
1840 | memset(&rb, 0, sizeof rb); | |
1841 | rb.count = gspca_dev->nbufread; | |
1842 | rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1843 | rb.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1844 | ret = vidioc_reqbufs(file, gspca_dev, &rb); |
1845 | if (ret != 0) { | |
d43fa32f | 1846 | PDEBUG(D_STREAM, "read reqbuf err %d", ret); |
a3d6e8cc | 1847 | goto out; |
63eb9546 JFM |
1848 | } |
1849 | memset(&v4l2_buf, 0, sizeof v4l2_buf); | |
1850 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1851 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1852 | for (i = 0; i < gspca_dev->nbufread; i++) { |
1853 | v4l2_buf.index = i; | |
63eb9546 JFM |
1854 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); |
1855 | if (ret != 0) { | |
1856 | PDEBUG(D_STREAM, "read qbuf err: %d", ret); | |
a3d6e8cc | 1857 | goto out; |
63eb9546 JFM |
1858 | } |
1859 | } | |
d43fa32f | 1860 | } |
4aa0d037 | 1861 | |
d43fa32f JFM |
1862 | /* start streaming */ |
1863 | ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE); | |
1864 | if (ret != 0) | |
1865 | PDEBUG(D_STREAM, "read streamon err %d", ret); | |
a3d6e8cc HV |
1866 | out: |
1867 | mutex_unlock(&gspca_dev->usb_lock); | |
d43fa32f JFM |
1868 | return ret; |
1869 | } | |
1870 | ||
1871 | static unsigned int dev_poll(struct file *file, poll_table *wait) | |
1872 | { | |
f4c1605a | 1873 | struct gspca_dev *gspca_dev = video_drvdata(file); |
a2d887c5 HG |
1874 | unsigned long req_events = poll_requested_events(wait); |
1875 | int ret = 0; | |
d43fa32f JFM |
1876 | |
1877 | PDEBUG(D_FRAM, "poll"); | |
1878 | ||
a2d887c5 HG |
1879 | if (req_events & POLLPRI) |
1880 | ret |= v4l2_ctrl_poll(file, wait); | |
d43fa32f | 1881 | |
a2d887c5 HG |
1882 | if (req_events & (POLLIN | POLLRDNORM)) { |
1883 | /* if reqbufs is not done, the user would use read() */ | |
1884 | if (gspca_dev->memory == GSPCA_MEMORY_NO) { | |
1885 | if (read_alloc(gspca_dev, file) != 0) { | |
1886 | ret |= POLLERR; | |
1887 | goto out; | |
1888 | } | |
1889 | } | |
63eb9546 | 1890 | |
a2d887c5 | 1891 | poll_wait(file, &gspca_dev->wq, wait); |
d43fa32f | 1892 | |
a2d887c5 HG |
1893 | /* check if an image has been received */ |
1894 | if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) { | |
1895 | ret |= POLLERR; | |
1896 | goto out; | |
1897 | } | |
1898 | if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i)) | |
1899 | ret |= POLLIN | POLLRDNORM; | |
1900 | mutex_unlock(&gspca_dev->queue_lock); | |
1901 | } | |
1902 | ||
1903 | out: | |
090264e5 | 1904 | if (!gspca_dev->present) |
a2d887c5 HG |
1905 | ret |= POLLHUP; |
1906 | ||
d43fa32f JFM |
1907 | return ret; |
1908 | } | |
1909 | ||
1910 | static ssize_t dev_read(struct file *file, char __user *data, | |
1911 | size_t count, loff_t *ppos) | |
1912 | { | |
f4c1605a | 1913 | struct gspca_dev *gspca_dev = video_drvdata(file); |
d43fa32f JFM |
1914 | struct gspca_frame *frame; |
1915 | struct v4l2_buffer v4l2_buf; | |
1916 | struct timeval timestamp; | |
82643d0e | 1917 | int n, ret, ret2; |
d43fa32f | 1918 | |
a9e11134 | 1919 | PDEBUG(D_FRAM, "read (%zd)", count); |
ee362991 | 1920 | if (gspca_dev->memory == GSPCA_MEMORY_NO) { /* first time ? */ |
d43fa32f JFM |
1921 | ret = read_alloc(gspca_dev, file); |
1922 | if (ret != 0) | |
1923 | return ret; | |
d43fa32f JFM |
1924 | } |
1925 | ||
63eb9546 | 1926 | /* get a frame */ |
5ba0e2c3 | 1927 | v4l2_get_timestamp(×tamp); |
63eb9546 | 1928 | timestamp.tv_sec--; |
82643d0e JFM |
1929 | n = 2; |
1930 | for (;;) { | |
63eb9546 JFM |
1931 | memset(&v4l2_buf, 0, sizeof v4l2_buf); |
1932 | v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
ac0d6df6 | 1933 | v4l2_buf.memory = GSPCA_MEMORY_READ; |
63eb9546 JFM |
1934 | ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf); |
1935 | if (ret != 0) { | |
1936 | PDEBUG(D_STREAM, "read dqbuf err %d", ret); | |
1937 | return ret; | |
1938 | } | |
1939 | ||
1940 | /* if the process slept for more than 1 second, | |
219423c1 | 1941 | * get a newer frame */ |
63eb9546 | 1942 | frame = &gspca_dev->frame[v4l2_buf.index]; |
82643d0e JFM |
1943 | if (--n < 0) |
1944 | break; /* avoid infinite loop */ | |
63eb9546 JFM |
1945 | if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec) |
1946 | break; | |
1947 | ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1948 | if (ret != 0) { | |
1949 | PDEBUG(D_STREAM, "read qbuf err %d", ret); | |
1950 | return ret; | |
1951 | } | |
1952 | } | |
1953 | ||
1954 | /* copy the frame */ | |
ac0d6df6 JFM |
1955 | if (count > frame->v4l2_buf.bytesused) |
1956 | count = frame->v4l2_buf.bytesused; | |
63eb9546 JFM |
1957 | ret = copy_to_user(data, frame->data, count); |
1958 | if (ret != 0) { | |
c93396e1 | 1959 | PERR("read cp to user lack %d / %zd", ret, count); |
63eb9546 JFM |
1960 | ret = -EFAULT; |
1961 | goto out; | |
1962 | } | |
1963 | ret = count; | |
1964 | out: | |
1965 | /* in each case, requeue the buffer */ | |
1966 | ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf); | |
1967 | if (ret2 != 0) | |
1968 | return ret2; | |
1969 | return ret; | |
1970 | } | |
1971 | ||
bec43661 | 1972 | static struct v4l2_file_operations dev_fops = { |
63eb9546 JFM |
1973 | .owner = THIS_MODULE, |
1974 | .open = dev_open, | |
1975 | .release = dev_close, | |
1976 | .read = dev_read, | |
1977 | .mmap = dev_mmap, | |
bec43661 | 1978 | .unlocked_ioctl = video_ioctl2, |
63eb9546 JFM |
1979 | .poll = dev_poll, |
1980 | }; | |
1981 | ||
a399810c | 1982 | static const struct v4l2_ioctl_ops dev_ioctl_ops = { |
63eb9546 JFM |
1983 | .vidioc_querycap = vidioc_querycap, |
1984 | .vidioc_dqbuf = vidioc_dqbuf, | |
1985 | .vidioc_qbuf = vidioc_qbuf, | |
e078770a MCC |
1986 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
1987 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
1988 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
1989 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
63eb9546 | 1990 | .vidioc_streamon = vidioc_streamon, |
63eb9546 JFM |
1991 | .vidioc_enum_input = vidioc_enum_input, |
1992 | .vidioc_g_input = vidioc_g_input, | |
1993 | .vidioc_s_input = vidioc_s_input, | |
1994 | .vidioc_reqbufs = vidioc_reqbufs, | |
1995 | .vidioc_querybuf = vidioc_querybuf, | |
1996 | .vidioc_streamoff = vidioc_streamoff, | |
1997 | .vidioc_g_jpegcomp = vidioc_g_jpegcomp, | |
1998 | .vidioc_s_jpegcomp = vidioc_s_jpegcomp, | |
1999 | .vidioc_g_parm = vidioc_g_parm, | |
2000 | .vidioc_s_parm = vidioc_s_parm, | |
11c635a2 | 2001 | .vidioc_enum_framesizes = vidioc_enum_framesizes, |
28ffe77f | 2002 | .vidioc_enum_frameintervals = vidioc_enum_frameintervals, |
af1d9afa | 2003 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
b1c85cc0 | 2004 | .vidioc_g_chip_info = vidioc_g_chip_info, |
af1d9afa BJ |
2005 | .vidioc_g_register = vidioc_g_register, |
2006 | .vidioc_s_register = vidioc_s_register, | |
2007 | #endif | |
d57fb9f8 HV |
2008 | .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
2009 | .vidioc_unsubscribe_event = v4l2_event_unsubscribe, | |
63eb9546 JFM |
2010 | }; |
2011 | ||
59929cef | 2012 | static const struct video_device gspca_template = { |
a399810c | 2013 | .name = "gspca main driver", |
a399810c HV |
2014 | .fops = &dev_fops, |
2015 | .ioctl_ops = &dev_ioctl_ops, | |
a3d6e8cc | 2016 | .release = video_device_release_empty, /* We use v4l2_dev.release */ |
a399810c HV |
2017 | }; |
2018 | ||
63eb9546 JFM |
2019 | /* |
2020 | * probe and create a new gspca device | |
2021 | * | |
2022 | * This function must be called by the sub-driver when it is | |
2023 | * called for probing a new device. | |
2024 | */ | |
4462864d | 2025 | int gspca_dev_probe2(struct usb_interface *intf, |
63eb9546 JFM |
2026 | const struct usb_device_id *id, |
2027 | const struct sd_desc *sd_desc, | |
d43fa32f JFM |
2028 | int dev_size, |
2029 | struct module *module) | |
63eb9546 | 2030 | { |
63eb9546 JFM |
2031 | struct gspca_dev *gspca_dev; |
2032 | struct usb_device *dev = interface_to_usbdev(intf); | |
2033 | int ret; | |
63eb9546 | 2034 | |
ee7dd4e0 JFM |
2035 | pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n", |
2036 | sd_desc->name, id->idVendor, id->idProduct); | |
63eb9546 | 2037 | |
63eb9546 JFM |
2038 | /* create the device */ |
2039 | if (dev_size < sizeof *gspca_dev) | |
2040 | dev_size = sizeof *gspca_dev; | |
2041 | gspca_dev = kzalloc(dev_size, GFP_KERNEL); | |
e293e599 | 2042 | if (!gspca_dev) { |
133a9fe9 | 2043 | pr_err("couldn't kzalloc gspca struct\n"); |
e293e599 | 2044 | return -ENOMEM; |
63eb9546 | 2045 | } |
8295d99e JFM |
2046 | gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL); |
2047 | if (!gspca_dev->usb_buf) { | |
133a9fe9 | 2048 | pr_err("out of memory\n"); |
e293e599 | 2049 | ret = -ENOMEM; |
8295d99e JFM |
2050 | goto out; |
2051 | } | |
63eb9546 | 2052 | gspca_dev->dev = dev; |
4462864d | 2053 | gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber; |
2fe15245 | 2054 | gspca_dev->xfer_ep = -1; |
35680baa JFM |
2055 | |
2056 | /* check if any audio device */ | |
5dae603d | 2057 | if (dev->actconfig->desc.bNumInterfaces != 1) { |
35680baa JFM |
2058 | int i; |
2059 | struct usb_interface *intf2; | |
2060 | ||
5dae603d HG |
2061 | for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) { |
2062 | intf2 = dev->actconfig->interface[i]; | |
35680baa JFM |
2063 | if (intf2 != NULL |
2064 | && intf2->altsetting != NULL | |
2065 | && intf2->altsetting->desc.bInterfaceClass == | |
2066 | USB_CLASS_AUDIO) { | |
2067 | gspca_dev->audio = 1; | |
2068 | break; | |
2069 | } | |
2070 | } | |
2071 | } | |
2072 | ||
a3d6e8cc | 2073 | gspca_dev->v4l2_dev.release = gspca_release; |
2333565d HV |
2074 | ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev); |
2075 | if (ret) | |
2076 | goto out; | |
63eb9546 | 2077 | gspca_dev->sd_desc = sd_desc; |
63eb9546 | 2078 | gspca_dev->nbufread = 2; |
ff374747 | 2079 | gspca_dev->empty_packet = -1; /* don't check the empty packets */ |
62bba5dd | 2080 | gspca_dev->vdev = gspca_template; |
2333565d | 2081 | gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev; |
f4c1605a | 2082 | video_set_drvdata(&gspca_dev->vdev, gspca_dev); |
62bba5dd HV |
2083 | gspca_dev->module = module; |
2084 | gspca_dev->present = 1; | |
2085 | ||
2086 | mutex_init(&gspca_dev->usb_lock); | |
a3d6e8cc | 2087 | gspca_dev->vdev.lock = &gspca_dev->usb_lock; |
62bba5dd HV |
2088 | mutex_init(&gspca_dev->queue_lock); |
2089 | init_waitqueue_head(&gspca_dev->wq); | |
63eb9546 | 2090 | |
012d6b02 | 2091 | /* configure the subdriver and initialize the USB device */ |
ba38ee8e | 2092 | ret = sd_desc->config(gspca_dev, id); |
012d6b02 JFM |
2093 | if (ret < 0) |
2094 | goto out; | |
ba38ee8e | 2095 | ret = sd_desc->init(gspca_dev); |
62bba5dd HV |
2096 | if (ret < 0) |
2097 | goto out; | |
2098 | if (sd_desc->init_controls) | |
2099 | ret = sd_desc->init_controls(gspca_dev); | |
63eb9546 JFM |
2100 | if (ret < 0) |
2101 | goto out; | |
2102 | gspca_set_default_mode(gspca_dev); | |
2103 | ||
10ee2402 HG |
2104 | ret = gspca_input_connect(gspca_dev); |
2105 | if (ret) | |
2106 | goto out; | |
2107 | ||
a3d6e8cc HV |
2108 | /* |
2109 | * Don't take usb_lock for these ioctls. This improves latency if | |
2110 | * usb_lock is taken for a long time, e.g. when changing a control | |
2111 | * value, and a new frame is ready to be dequeued. | |
2112 | */ | |
152a3a73 HV |
2113 | v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_DQBUF); |
2114 | v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QBUF); | |
2115 | v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QUERYBUF); | |
ac3322b0 | 2116 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
b1c85cc0 | 2117 | if (!gspca_dev->sd_desc->get_register) |
ac3322b0 | 2118 | v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_G_REGISTER); |
b1c85cc0 | 2119 | if (!gspca_dev->sd_desc->set_register) |
ac3322b0 HV |
2120 | v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_S_REGISTER); |
2121 | #endif | |
2122 | if (!gspca_dev->sd_desc->get_jcomp) | |
2123 | v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_G_JPEGCOMP); | |
2124 | if (!gspca_dev->sd_desc->set_jcomp) | |
2125 | v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_S_JPEGCOMP); | |
a3d6e8cc | 2126 | |
63eb9546 | 2127 | /* init video stuff */ |
a12ca6a6 | 2128 | ret = video_register_device(&gspca_dev->vdev, |
63eb9546 | 2129 | VFL_TYPE_GRABBER, |
8d584a53 | 2130 | -1); |
63eb9546 | 2131 | if (ret < 0) { |
133a9fe9 | 2132 | pr_err("video_register_device err %d\n", ret); |
63eb9546 JFM |
2133 | goto out; |
2134 | } | |
2135 | ||
63eb9546 | 2136 | usb_set_intfdata(intf, gspca_dev); |
38c7c036 | 2137 | PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev)); |
0274d42e | 2138 | |
10ee2402 | 2139 | gspca_input_create_urb(gspca_dev); |
0274d42e | 2140 | |
63eb9546 JFM |
2141 | return 0; |
2142 | out: | |
13a00fab | 2143 | #if IS_ENABLED(CONFIG_INPUT) |
10ee2402 HG |
2144 | if (gspca_dev->input_dev) |
2145 | input_unregister_device(gspca_dev->input_dev); | |
e7637521 | 2146 | #endif |
62bba5dd | 2147 | v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler); |
e07a1d8a JFM |
2148 | kfree(gspca_dev->usb_buf); |
2149 | kfree(gspca_dev); | |
63eb9546 JFM |
2150 | return ret; |
2151 | } | |
4462864d JFM |
2152 | EXPORT_SYMBOL(gspca_dev_probe2); |
2153 | ||
2154 | /* same function as the previous one, but check the interface */ | |
2155 | int gspca_dev_probe(struct usb_interface *intf, | |
2156 | const struct usb_device_id *id, | |
2157 | const struct sd_desc *sd_desc, | |
2158 | int dev_size, | |
2159 | struct module *module) | |
2160 | { | |
2161 | struct usb_device *dev = interface_to_usbdev(intf); | |
2162 | ||
2163 | /* we don't handle multi-config cameras */ | |
2164 | if (dev->descriptor.bNumConfigurations != 1) { | |
133a9fe9 JP |
2165 | pr_err("%04x:%04x too many config\n", |
2166 | id->idVendor, id->idProduct); | |
4462864d JFM |
2167 | return -ENODEV; |
2168 | } | |
2169 | ||
2170 | /* the USB video interface must be the first one */ | |
5dae603d | 2171 | if (dev->actconfig->desc.bNumInterfaces != 1 |
c4dc692c | 2172 | && intf->cur_altsetting->desc.bInterfaceNumber != 0) |
4462864d | 2173 | return -ENODEV; |
4462864d JFM |
2174 | |
2175 | return gspca_dev_probe2(intf, id, sd_desc, dev_size, module); | |
2176 | } | |
63eb9546 JFM |
2177 | EXPORT_SYMBOL(gspca_dev_probe); |
2178 | ||
2179 | /* | |
2180 | * USB disconnection | |
2181 | * | |
2182 | * This function must be called by the sub-driver | |
2183 | * when the device disconnects, after the specific resources are freed. | |
2184 | */ | |
2185 | void gspca_disconnect(struct usb_interface *intf) | |
2186 | { | |
4aa0d037 | 2187 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); |
13a00fab | 2188 | #if IS_ENABLED(CONFIG_INPUT) |
0274d42e | 2189 | struct input_dev *input_dev; |
e070bf9e | 2190 | #endif |
63eb9546 | 2191 | |
38c7c036 LP |
2192 | PDEBUG(D_PROBE, "%s disconnect", |
2193 | video_device_node_name(&gspca_dev->vdev)); | |
a3d6e8cc | 2194 | |
ad28127d | 2195 | mutex_lock(&gspca_dev->usb_lock); |
4e770f76 | 2196 | |
6e4ae872 | 2197 | gspca_dev->present = 0; |
4e770f76 | 2198 | destroy_urbs(gspca_dev); |
090264e5 | 2199 | |
13a00fab | 2200 | #if IS_ENABLED(CONFIG_INPUT) |
0274d42e MN |
2201 | gspca_input_destroy_urb(gspca_dev); |
2202 | input_dev = gspca_dev->input_dev; | |
2203 | if (input_dev) { | |
2204 | gspca_dev->input_dev = NULL; | |
2205 | input_unregister_device(input_dev); | |
2206 | } | |
e070bf9e | 2207 | #endif |
eb238732 HG |
2208 | /* Free subdriver's streaming resources / stop sd workqueue(s) */ |
2209 | if (gspca_dev->sd_desc->stop0 && gspca_dev->streaming) | |
2210 | gspca_dev->sd_desc->stop0(gspca_dev); | |
2211 | gspca_dev->streaming = 0; | |
345321dc | 2212 | gspca_dev->dev = NULL; |
eb238732 | 2213 | wake_up_interruptible(&gspca_dev->wq); |
0274d42e | 2214 | |
2333565d | 2215 | v4l2_device_disconnect(&gspca_dev->v4l2_dev); |
a3d6e8cc | 2216 | video_unregister_device(&gspca_dev->vdev); |
090264e5 | 2217 | |
a3d6e8cc | 2218 | mutex_unlock(&gspca_dev->usb_lock); |
6b060ffe | 2219 | |
25985edc | 2220 | /* (this will call gspca_release() immediately or on last close) */ |
a3d6e8cc | 2221 | v4l2_device_put(&gspca_dev->v4l2_dev); |
63eb9546 JFM |
2222 | } |
2223 | EXPORT_SYMBOL(gspca_disconnect); | |
2224 | ||
6a709749 JFM |
2225 | #ifdef CONFIG_PM |
2226 | int gspca_suspend(struct usb_interface *intf, pm_message_t message) | |
2227 | { | |
2228 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
2229 | ||
36adfca9 HG |
2230 | gspca_input_destroy_urb(gspca_dev); |
2231 | ||
6a709749 JFM |
2232 | if (!gspca_dev->streaming) |
2233 | return 0; | |
36adfca9 | 2234 | |
a3d6e8cc | 2235 | mutex_lock(&gspca_dev->usb_lock); |
6a709749 | 2236 | gspca_dev->frozen = 1; /* avoid urb error messages */ |
9a190c85 | 2237 | gspca_dev->usb_err = 0; |
012d6b02 JFM |
2238 | if (gspca_dev->sd_desc->stopN) |
2239 | gspca_dev->sd_desc->stopN(gspca_dev); | |
6a709749 JFM |
2240 | destroy_urbs(gspca_dev); |
2241 | gspca_set_alt0(gspca_dev); | |
a3d6e8cc | 2242 | if (gspca_dev->sd_desc->stop0) |
012d6b02 | 2243 | gspca_dev->sd_desc->stop0(gspca_dev); |
a3d6e8cc | 2244 | mutex_unlock(&gspca_dev->usb_lock); |
36adfca9 | 2245 | |
6a709749 JFM |
2246 | return 0; |
2247 | } | |
2248 | EXPORT_SYMBOL(gspca_suspend); | |
2249 | ||
2250 | int gspca_resume(struct usb_interface *intf) | |
2251 | { | |
2252 | struct gspca_dev *gspca_dev = usb_get_intfdata(intf); | |
254902b0 | 2253 | int streaming, ret = 0; |
6a709749 | 2254 | |
a3d6e8cc | 2255 | mutex_lock(&gspca_dev->usb_lock); |
6a709749 | 2256 | gspca_dev->frozen = 0; |
9a190c85 | 2257 | gspca_dev->usb_err = 0; |
012d6b02 | 2258 | gspca_dev->sd_desc->init(gspca_dev); |
62bba5dd HV |
2259 | /* |
2260 | * Most subdrivers send all ctrl values on sd_start and thus | |
2261 | * only write to the device registers on s_ctrl when streaming -> | |
2262 | * Clear streaming to avoid setting all ctrls twice. | |
2263 | */ | |
2264 | streaming = gspca_dev->streaming; | |
2265 | gspca_dev->streaming = 0; | |
a3d6e8cc | 2266 | if (streaming) |
254902b0 | 2267 | ret = gspca_init_transfer(gspca_dev); |
36adfca9 HG |
2268 | else |
2269 | gspca_input_create_urb(gspca_dev); | |
a3d6e8cc | 2270 | mutex_unlock(&gspca_dev->usb_lock); |
36adfca9 | 2271 | |
254902b0 | 2272 | return ret; |
6a709749 JFM |
2273 | } |
2274 | EXPORT_SYMBOL(gspca_resume); | |
2275 | #endif | |
dcef3237 | 2276 | |
63eb9546 JFM |
2277 | /* -- module insert / remove -- */ |
2278 | static int __init gspca_init(void) | |
2279 | { | |
f22123fa | 2280 | pr_info("v" GSPCA_VERSION " registered\n"); |
63eb9546 JFM |
2281 | return 0; |
2282 | } | |
2283 | static void __exit gspca_exit(void) | |
2284 | { | |
63eb9546 JFM |
2285 | } |
2286 | ||
2287 | module_init(gspca_init); | |
2288 | module_exit(gspca_exit); | |
2289 | ||
2290 | module_param_named(debug, gspca_debug, int, 0644); | |
2291 | MODULE_PARM_DESC(debug, | |
c93396e1 | 2292 | "1:probe 2:config 3:stream 4:frame 5:packet 6:usbi 7:usbo"); |