1 /*
2 * Copyright (c) 2013,2016 Lubomir Rintel
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions, and the following disclaimer,
10 * without modification.
11 * 2. The name of the author may not be used to endorse or promote products
12 * derived from this software without specific prior written permission.
13 *
14 * Alternatively, this software may be distributed under the terms of the
15 * GNU General Public License ("GPL").
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29 /*
30 * Fushicai USBTV007 Audio-Video Grabber Driver
31 *
32 * Product web site:
33 * http://www.fushicai.com/products_detail/&productId=d05449ee-b690-42f9-a661-aa7353894bed.html
34 *
35 * Following LWN articles were very useful in construction of this driver:
36 * Video4Linux2 API series: http://lwn.net/Articles/203924/
37 * videobuf2 API explanation: http://lwn.net/Articles/447435/
38 * Thanks go to Jonathan Corbet for providing this quality documentation.
39 * He is awesome.
40 *
41 * No physical hardware was harmed running Windows during the
42 * reverse-engineering activity
43 */
44
45 #include <media/v4l2-ioctl.h>
46 #include <media/videobuf2-v4l2.h>
47
48 #include "usbtv.h"
49
50 static const struct usbtv_norm_params norm_params[] = {
51 {
52 .norm = V4L2_STD_525_60,
53 .cap_width = 720,
54 .cap_height = 480,
55 },
56 {
57 .norm = V4L2_STD_625_50,
58 .cap_width = 720,
59 .cap_height = 576,
60 }
61 };
62
usbtv_configure_for_norm(struct usbtv * usbtv,v4l2_std_id norm)63 static int usbtv_configure_for_norm(struct usbtv *usbtv, v4l2_std_id norm)
64 {
65 int i, ret = 0;
66 const struct usbtv_norm_params *params = NULL;
67
68 for (i = 0; i < ARRAY_SIZE(norm_params); i++) {
69 if (norm_params[i].norm & norm) {
70 params = &norm_params[i];
71 break;
72 }
73 }
74
75 if (params) {
76 usbtv->width = params->cap_width;
77 usbtv->height = params->cap_height;
78 usbtv->n_chunks = usbtv->width * usbtv->height
79 / 4 / USBTV_CHUNK;
80 usbtv->norm = norm;
81 } else
82 ret = -EINVAL;
83
84 return ret;
85 }
86
usbtv_select_input(struct usbtv * usbtv,int input)87 static int usbtv_select_input(struct usbtv *usbtv, int input)
88 {
89 int ret;
90
91 static const u16 composite[][2] = {
92 { USBTV_BASE + 0x0105, 0x0060 },
93 { USBTV_BASE + 0x011f, 0x00f2 },
94 { USBTV_BASE + 0x0127, 0x0060 },
95 { USBTV_BASE + 0x00ae, 0x0010 },
96 { USBTV_BASE + 0x0239, 0x0060 },
97 };
98
99 static const u16 svideo[][2] = {
100 { USBTV_BASE + 0x0105, 0x0010 },
101 { USBTV_BASE + 0x011f, 0x00ff },
102 { USBTV_BASE + 0x0127, 0x0060 },
103 { USBTV_BASE + 0x00ae, 0x0030 },
104 { USBTV_BASE + 0x0239, 0x0060 },
105 };
106
107 switch (input) {
108 case USBTV_COMPOSITE_INPUT:
109 ret = usbtv_set_regs(usbtv, composite, ARRAY_SIZE(composite));
110 break;
111 case USBTV_SVIDEO_INPUT:
112 ret = usbtv_set_regs(usbtv, svideo, ARRAY_SIZE(svideo));
113 break;
114 default:
115 ret = -EINVAL;
116 }
117
118 if (!ret)
119 usbtv->input = input;
120
121 return ret;
122 }
123
usbtv_norm_to_16f_reg(v4l2_std_id norm)124 static uint16_t usbtv_norm_to_16f_reg(v4l2_std_id norm)
125 {
126 /* NTSC M/M-JP/M-KR */
127 if (norm & V4L2_STD_NTSC)
128 return 0x00b8;
129 /* PAL BG/DK/H/I */
130 if (norm & V4L2_STD_PAL)
131 return 0x00ee;
132 /* SECAM B/D/G/H/K/K1/L/Lc */
133 if (norm & V4L2_STD_SECAM)
134 return 0x00ff;
135 if (norm & V4L2_STD_NTSC_443)
136 return 0x00a8;
137 if (norm & (V4L2_STD_PAL_M | V4L2_STD_PAL_60))
138 return 0x00bc;
139 if (norm & V4L2_STD_PAL_Nc)
140 return 0x00fe;
141 /* Fallback to automatic detection for other standards */
142 return 0x0000;
143 }
144
usbtv_select_norm(struct usbtv * usbtv,v4l2_std_id norm)145 static int usbtv_select_norm(struct usbtv *usbtv, v4l2_std_id norm)
146 {
147 int ret;
148 /* These are the series of register values used to configure the
149 * decoder for a specific standard.
150 * The first 21 register writes are copied from the
151 * Settings\DecoderDefaults registry keys present in the Windows driver
152 * .INF file, and control various image tuning parameters (color
153 * correction, sharpness, ...).
154 */
155 static const u16 pal[][2] = {
156 /* "AVPAL" tuning sequence from .INF file */
157 { USBTV_BASE + 0x0003, 0x0004 },
158 { USBTV_BASE + 0x001a, 0x0068 },
159 { USBTV_BASE + 0x0100, 0x00d3 },
160 { USBTV_BASE + 0x010e, 0x0072 },
161 { USBTV_BASE + 0x010f, 0x00a2 },
162 { USBTV_BASE + 0x0112, 0x00b0 },
163 { USBTV_BASE + 0x0115, 0x0015 },
164 { USBTV_BASE + 0x0117, 0x0001 },
165 { USBTV_BASE + 0x0118, 0x002c },
166 { USBTV_BASE + 0x012d, 0x0010 },
167 { USBTV_BASE + 0x012f, 0x0020 },
168 { USBTV_BASE + 0x0220, 0x002e },
169 { USBTV_BASE + 0x0225, 0x0008 },
170 { USBTV_BASE + 0x024e, 0x0002 },
171 { USBTV_BASE + 0x024f, 0x0002 },
172 { USBTV_BASE + 0x0254, 0x0059 },
173 { USBTV_BASE + 0x025a, 0x0016 },
174 { USBTV_BASE + 0x025b, 0x0035 },
175 { USBTV_BASE + 0x0263, 0x0017 },
176 { USBTV_BASE + 0x0266, 0x0016 },
177 { USBTV_BASE + 0x0267, 0x0036 },
178 /* End image tuning */
179 { USBTV_BASE + 0x024e, 0x0002 },
180 { USBTV_BASE + 0x024f, 0x0002 },
181 };
182
183 static const u16 ntsc[][2] = {
184 /* "AVNTSC" tuning sequence from .INF file */
185 { USBTV_BASE + 0x0003, 0x0004 },
186 { USBTV_BASE + 0x001a, 0x0079 },
187 { USBTV_BASE + 0x0100, 0x00d3 },
188 { USBTV_BASE + 0x010e, 0x0068 },
189 { USBTV_BASE + 0x010f, 0x009c },
190 { USBTV_BASE + 0x0112, 0x00f0 },
191 { USBTV_BASE + 0x0115, 0x0015 },
192 { USBTV_BASE + 0x0117, 0x0000 },
193 { USBTV_BASE + 0x0118, 0x00fc },
194 { USBTV_BASE + 0x012d, 0x0004 },
195 { USBTV_BASE + 0x012f, 0x0008 },
196 { USBTV_BASE + 0x0220, 0x002e },
197 { USBTV_BASE + 0x0225, 0x0008 },
198 { USBTV_BASE + 0x024e, 0x0002 },
199 { USBTV_BASE + 0x024f, 0x0001 },
200 { USBTV_BASE + 0x0254, 0x005f },
201 { USBTV_BASE + 0x025a, 0x0012 },
202 { USBTV_BASE + 0x025b, 0x0001 },
203 { USBTV_BASE + 0x0263, 0x001c },
204 { USBTV_BASE + 0x0266, 0x0011 },
205 { USBTV_BASE + 0x0267, 0x0005 },
206 /* End image tuning */
207 { USBTV_BASE + 0x024e, 0x0002 },
208 { USBTV_BASE + 0x024f, 0x0002 },
209 };
210
211 static const u16 secam[][2] = {
212 /* "AVSECAM" tuning sequence from .INF file */
213 { USBTV_BASE + 0x0003, 0x0004 },
214 { USBTV_BASE + 0x001a, 0x0073 },
215 { USBTV_BASE + 0x0100, 0x00dc },
216 { USBTV_BASE + 0x010e, 0x0072 },
217 { USBTV_BASE + 0x010f, 0x00a2 },
218 { USBTV_BASE + 0x0112, 0x0090 },
219 { USBTV_BASE + 0x0115, 0x0035 },
220 { USBTV_BASE + 0x0117, 0x0001 },
221 { USBTV_BASE + 0x0118, 0x0030 },
222 { USBTV_BASE + 0x012d, 0x0004 },
223 { USBTV_BASE + 0x012f, 0x0008 },
224 { USBTV_BASE + 0x0220, 0x002d },
225 { USBTV_BASE + 0x0225, 0x0028 },
226 { USBTV_BASE + 0x024e, 0x0008 },
227 { USBTV_BASE + 0x024f, 0x0002 },
228 { USBTV_BASE + 0x0254, 0x0069 },
229 { USBTV_BASE + 0x025a, 0x0016 },
230 { USBTV_BASE + 0x025b, 0x0035 },
231 { USBTV_BASE + 0x0263, 0x0021 },
232 { USBTV_BASE + 0x0266, 0x0016 },
233 { USBTV_BASE + 0x0267, 0x0036 },
234 /* End image tuning */
235 { USBTV_BASE + 0x024e, 0x0002 },
236 { USBTV_BASE + 0x024f, 0x0002 },
237 };
238
239 ret = usbtv_configure_for_norm(usbtv, norm);
240
241 if (!ret) {
242 /* Masks for norms using a NTSC or PAL color encoding. */
243 static const v4l2_std_id ntsc_mask =
244 V4L2_STD_NTSC | V4L2_STD_NTSC_443;
245 static const v4l2_std_id pal_mask =
246 V4L2_STD_PAL | V4L2_STD_PAL_60 | V4L2_STD_PAL_M |
247 V4L2_STD_PAL_Nc;
248
249 if (norm & ntsc_mask)
250 ret = usbtv_set_regs(usbtv, ntsc, ARRAY_SIZE(ntsc));
251 else if (norm & pal_mask)
252 ret = usbtv_set_regs(usbtv, pal, ARRAY_SIZE(pal));
253 else if (norm & V4L2_STD_SECAM)
254 ret = usbtv_set_regs(usbtv, secam, ARRAY_SIZE(secam));
255 else
256 ret = -EINVAL;
257 }
258
259 if (!ret) {
260 /* Configure the decoder for the color standard */
261 const u16 cfg[][2] = {
262 { USBTV_BASE + 0x016f, usbtv_norm_to_16f_reg(norm) }
263 };
264 ret = usbtv_set_regs(usbtv, cfg, ARRAY_SIZE(cfg));
265 }
266
267 return ret;
268 }
269
usbtv_setup_capture(struct usbtv * usbtv)270 static int usbtv_setup_capture(struct usbtv *usbtv)
271 {
272 int ret;
273 static const u16 setup[][2] = {
274 /* These seem to enable the device. */
275 { USBTV_BASE + 0x0008, 0x0001 },
276 { USBTV_BASE + 0x01d0, 0x00ff },
277 { USBTV_BASE + 0x01d9, 0x0002 },
278
279 /* These seem to influence color parameters, such as
280 * brightness, etc. */
281 { USBTV_BASE + 0x0239, 0x0040 },
282 { USBTV_BASE + 0x0240, 0x0000 },
283 { USBTV_BASE + 0x0241, 0x0000 },
284 { USBTV_BASE + 0x0242, 0x0002 },
285 { USBTV_BASE + 0x0243, 0x0080 },
286 { USBTV_BASE + 0x0244, 0x0012 },
287 { USBTV_BASE + 0x0245, 0x0090 },
288 { USBTV_BASE + 0x0246, 0x0000 },
289
290 { USBTV_BASE + 0x0278, 0x002d },
291 { USBTV_BASE + 0x0279, 0x000a },
292 { USBTV_BASE + 0x027a, 0x0032 },
293 { 0xf890, 0x000c },
294 { 0xf894, 0x0086 },
295
296 { USBTV_BASE + 0x00ac, 0x00c0 },
297 { USBTV_BASE + 0x00ad, 0x0000 },
298 { USBTV_BASE + 0x00a2, 0x0012 },
299 { USBTV_BASE + 0x00a3, 0x00e0 },
300 { USBTV_BASE + 0x00a4, 0x0028 },
301 { USBTV_BASE + 0x00a5, 0x0082 },
302 { USBTV_BASE + 0x00a7, 0x0080 },
303 { USBTV_BASE + 0x0000, 0x0014 },
304 { USBTV_BASE + 0x0006, 0x0003 },
305 { USBTV_BASE + 0x0090, 0x0099 },
306 { USBTV_BASE + 0x0091, 0x0090 },
307 { USBTV_BASE + 0x0094, 0x0068 },
308 { USBTV_BASE + 0x0095, 0x0070 },
309 { USBTV_BASE + 0x009c, 0x0030 },
310 { USBTV_BASE + 0x009d, 0x00c0 },
311 { USBTV_BASE + 0x009e, 0x00e0 },
312 { USBTV_BASE + 0x0019, 0x0006 },
313 { USBTV_BASE + 0x008c, 0x00ba },
314 { USBTV_BASE + 0x0101, 0x00ff },
315 { USBTV_BASE + 0x010c, 0x00b3 },
316 { USBTV_BASE + 0x01b2, 0x0080 },
317 { USBTV_BASE + 0x01b4, 0x00a0 },
318 { USBTV_BASE + 0x014c, 0x00ff },
319 { USBTV_BASE + 0x014d, 0x00ca },
320 { USBTV_BASE + 0x0113, 0x0053 },
321 { USBTV_BASE + 0x0119, 0x008a },
322 { USBTV_BASE + 0x013c, 0x0003 },
323 { USBTV_BASE + 0x0150, 0x009c },
324 { USBTV_BASE + 0x0151, 0x0071 },
325 { USBTV_BASE + 0x0152, 0x00c6 },
326 { USBTV_BASE + 0x0153, 0x0084 },
327 { USBTV_BASE + 0x0154, 0x00bc },
328 { USBTV_BASE + 0x0155, 0x00a0 },
329 { USBTV_BASE + 0x0156, 0x00a0 },
330 { USBTV_BASE + 0x0157, 0x009c },
331 { USBTV_BASE + 0x0158, 0x001f },
332 { USBTV_BASE + 0x0159, 0x0006 },
333 { USBTV_BASE + 0x015d, 0x0000 },
334 };
335
336 ret = usbtv_set_regs(usbtv, setup, ARRAY_SIZE(setup));
337 if (ret)
338 return ret;
339
340 ret = usbtv_select_norm(usbtv, usbtv->norm);
341 if (ret)
342 return ret;
343
344 ret = usbtv_select_input(usbtv, usbtv->input);
345 if (ret)
346 return ret;
347
348 ret = v4l2_ctrl_handler_setup(&usbtv->ctrl);
349 if (ret)
350 return ret;
351
352 return 0;
353 }
354
355 /* Copy data from chunk into a frame buffer, deinterlacing the data
356 * into every second line. Unfortunately, they don't align nicely into
357 * 720 pixel lines, as the chunk is 240 words long, which is 480 pixels.
358 * Therefore, we break down the chunk into two halves before copying,
359 * so that we can interleave a line if needed.
360 *
361 * Each "chunk" is 240 words; a word in this context equals 4 bytes.
362 * Image format is YUYV/YUV 4:2:2, consisting of Y Cr Y Cb, defining two
363 * pixels, the Cr and Cb shared between the two pixels, but each having
364 * separate Y values. Thus, the 240 words equal 480 pixels. It therefore,
365 * takes 1.5 chunks to make a 720 pixel-wide line for the frame.
366 * The image is interlaced, so there is a "scan" of odd lines, followed
367 * by "scan" of even numbered lines.
368 *
369 * Following code is writing the chunks in correct sequence, skipping
370 * the rows based on "odd" value.
371 * line 1: chunk[0][ 0..479] chunk[0][480..959] chunk[1][ 0..479]
372 * line 3: chunk[1][480..959] chunk[2][ 0..479] chunk[2][480..959]
373 * ...etc.
374 */
usbtv_chunk_to_vbuf(u32 * frame,__be32 * src,int chunk_no,int odd)375 static void usbtv_chunk_to_vbuf(u32 *frame, __be32 *src, int chunk_no, int odd)
376 {
377 int half;
378
379 for (half = 0; half < 2; half++) {
380 int part_no = chunk_no * 2 + half;
381 int line = part_no / 3;
382 int part_index = (line * 2 + !odd) * 3 + (part_no % 3);
383
384 u32 *dst = &frame[part_index * USBTV_CHUNK/2];
385
386 memcpy(dst, src, USBTV_CHUNK/2 * sizeof(*src));
387 src += USBTV_CHUNK/2;
388 }
389 }
390
391 /* Called for each 256-byte image chunk.
392 * First word identifies the chunk, followed by 240 words of image
393 * data and padding. */
usbtv_image_chunk(struct usbtv * usbtv,__be32 * chunk)394 static void usbtv_image_chunk(struct usbtv *usbtv, __be32 *chunk)
395 {
396 int frame_id, odd, chunk_no;
397 u32 *frame;
398 struct usbtv_buf *buf;
399 unsigned long flags;
400
401 /* Ignore corrupted lines. */
402 if (!USBTV_MAGIC_OK(chunk))
403 return;
404 frame_id = USBTV_FRAME_ID(chunk);
405 odd = USBTV_ODD(chunk);
406 chunk_no = USBTV_CHUNK_NO(chunk);
407 if (chunk_no >= usbtv->n_chunks)
408 return;
409
410 /* Beginning of a frame. */
411 if (chunk_no == 0) {
412 usbtv->frame_id = frame_id;
413 usbtv->chunks_done = 0;
414 }
415
416 if (usbtv->frame_id != frame_id)
417 return;
418
419 spin_lock_irqsave(&usbtv->buflock, flags);
420 if (list_empty(&usbtv->bufs)) {
421 /* No free buffers. Userspace likely too slow. */
422 spin_unlock_irqrestore(&usbtv->buflock, flags);
423 return;
424 }
425
426 /* First available buffer. */
427 buf = list_first_entry(&usbtv->bufs, struct usbtv_buf, list);
428 frame = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
429
430 /* Copy the chunk data. */
431 usbtv_chunk_to_vbuf(frame, &chunk[1], chunk_no, odd);
432 usbtv->chunks_done++;
433
434 /* Last chunk in a field */
435 if (chunk_no == usbtv->n_chunks-1) {
436 /* Last chunk in a frame, signalling an end */
437 if (odd && !usbtv->last_odd) {
438 int size = vb2_plane_size(&buf->vb.vb2_buf, 0);
439 enum vb2_buffer_state state = usbtv->chunks_done ==
440 usbtv->n_chunks ?
441 VB2_BUF_STATE_DONE :
442 VB2_BUF_STATE_ERROR;
443
444 buf->vb.field = V4L2_FIELD_INTERLACED;
445 buf->vb.sequence = usbtv->sequence++;
446 buf->vb.vb2_buf.timestamp = ktime_get_ns();
447 vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size);
448 vb2_buffer_done(&buf->vb.vb2_buf, state);
449 list_del(&buf->list);
450 }
451 usbtv->last_odd = odd;
452 }
453
454 spin_unlock_irqrestore(&usbtv->buflock, flags);
455 }
456
457 /* Got image data. Each packet contains a number of 256-word chunks we
458 * compose the image from. */
usbtv_iso_cb(struct urb * ip)459 static void usbtv_iso_cb(struct urb *ip)
460 {
461 int ret;
462 int i;
463 struct usbtv *usbtv = (struct usbtv *)ip->context;
464
465 switch (ip->status) {
466 /* All fine. */
467 case 0:
468 break;
469 /* Device disconnected or capture stopped? */
470 case -ENODEV:
471 case -ENOENT:
472 case -ECONNRESET:
473 case -ESHUTDOWN:
474 return;
475 /* Unknown error. Retry. */
476 default:
477 dev_warn(usbtv->dev, "Bad response for ISO request.\n");
478 goto resubmit;
479 }
480
481 for (i = 0; i < ip->number_of_packets; i++) {
482 int size = ip->iso_frame_desc[i].actual_length;
483 unsigned char *data = ip->transfer_buffer +
484 ip->iso_frame_desc[i].offset;
485 int offset;
486
487 for (offset = 0; USBTV_CHUNK_SIZE * offset < size; offset++)
488 usbtv_image_chunk(usbtv,
489 (__be32 *)&data[USBTV_CHUNK_SIZE * offset]);
490 }
491
492 resubmit:
493 ret = usb_submit_urb(ip, GFP_ATOMIC);
494 if (ret < 0)
495 dev_warn(usbtv->dev, "Could not resubmit ISO URB\n");
496 }
497
usbtv_setup_iso_transfer(struct usbtv * usbtv)498 static struct urb *usbtv_setup_iso_transfer(struct usbtv *usbtv)
499 {
500 struct urb *ip;
501 int size = usbtv->iso_size;
502 int i;
503
504 ip = usb_alloc_urb(USBTV_ISOC_PACKETS, GFP_KERNEL);
505 if (ip == NULL)
506 return NULL;
507
508 ip->dev = usbtv->udev;
509 ip->context = usbtv;
510 ip->pipe = usb_rcvisocpipe(usbtv->udev, USBTV_VIDEO_ENDP);
511 ip->interval = 1;
512 ip->transfer_flags = URB_ISO_ASAP;
513 ip->transfer_buffer = kcalloc(USBTV_ISOC_PACKETS, size,
514 GFP_KERNEL);
515 if (!ip->transfer_buffer) {
516 usb_free_urb(ip);
517 return NULL;
518 }
519 ip->complete = usbtv_iso_cb;
520 ip->number_of_packets = USBTV_ISOC_PACKETS;
521 ip->transfer_buffer_length = size * USBTV_ISOC_PACKETS;
522 for (i = 0; i < USBTV_ISOC_PACKETS; i++) {
523 ip->iso_frame_desc[i].offset = size * i;
524 ip->iso_frame_desc[i].length = size;
525 }
526
527 return ip;
528 }
529
usbtv_stop(struct usbtv * usbtv)530 static void usbtv_stop(struct usbtv *usbtv)
531 {
532 int i;
533 unsigned long flags;
534
535 /* Cancel running transfers. */
536 for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) {
537 struct urb *ip = usbtv->isoc_urbs[i];
538
539 if (ip == NULL)
540 continue;
541 usb_kill_urb(ip);
542 kfree(ip->transfer_buffer);
543 usb_free_urb(ip);
544 usbtv->isoc_urbs[i] = NULL;
545 }
546
547 /* Return buffers to userspace. */
548 spin_lock_irqsave(&usbtv->buflock, flags);
549 while (!list_empty(&usbtv->bufs)) {
550 struct usbtv_buf *buf = list_first_entry(&usbtv->bufs,
551 struct usbtv_buf, list);
552 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
553 list_del(&buf->list);
554 }
555 spin_unlock_irqrestore(&usbtv->buflock, flags);
556 }
557
usbtv_start(struct usbtv * usbtv)558 static int usbtv_start(struct usbtv *usbtv)
559 {
560 int i;
561 int ret;
562
563 usbtv_audio_suspend(usbtv);
564
565 ret = usb_set_interface(usbtv->udev, 0, 0);
566 if (ret < 0)
567 return ret;
568
569 ret = usbtv_setup_capture(usbtv);
570 if (ret < 0)
571 return ret;
572
573 ret = usb_set_interface(usbtv->udev, 0, 1);
574 if (ret < 0)
575 return ret;
576
577 usbtv_audio_resume(usbtv);
578
579 for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) {
580 struct urb *ip;
581
582 ip = usbtv_setup_iso_transfer(usbtv);
583 if (ip == NULL) {
584 ret = -ENOMEM;
585 goto start_fail;
586 }
587 usbtv->isoc_urbs[i] = ip;
588
589 ret = usb_submit_urb(ip, GFP_KERNEL);
590 if (ret < 0)
591 goto start_fail;
592 }
593
594 return 0;
595
596 start_fail:
597 usbtv_stop(usbtv);
598 return ret;
599 }
600
usbtv_querycap(struct file * file,void * priv,struct v4l2_capability * cap)601 static int usbtv_querycap(struct file *file, void *priv,
602 struct v4l2_capability *cap)
603 {
604 struct usbtv *dev = video_drvdata(file);
605
606 strscpy(cap->driver, "usbtv", sizeof(cap->driver));
607 strscpy(cap->card, "usbtv", sizeof(cap->card));
608 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
609 return 0;
610 }
611
usbtv_enum_input(struct file * file,void * priv,struct v4l2_input * i)612 static int usbtv_enum_input(struct file *file, void *priv,
613 struct v4l2_input *i)
614 {
615 struct usbtv *dev = video_drvdata(file);
616
617 switch (i->index) {
618 case USBTV_COMPOSITE_INPUT:
619 strscpy(i->name, "Composite", sizeof(i->name));
620 break;
621 case USBTV_SVIDEO_INPUT:
622 strscpy(i->name, "S-Video", sizeof(i->name));
623 break;
624 default:
625 return -EINVAL;
626 }
627
628 i->type = V4L2_INPUT_TYPE_CAMERA;
629 i->std = dev->vdev.tvnorms;
630 return 0;
631 }
632
usbtv_enum_fmt_vid_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)633 static int usbtv_enum_fmt_vid_cap(struct file *file, void *priv,
634 struct v4l2_fmtdesc *f)
635 {
636 if (f->index > 0)
637 return -EINVAL;
638
639 f->pixelformat = V4L2_PIX_FMT_YUYV;
640 return 0;
641 }
642
usbtv_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)643 static int usbtv_fmt_vid_cap(struct file *file, void *priv,
644 struct v4l2_format *f)
645 {
646 struct usbtv *usbtv = video_drvdata(file);
647
648 f->fmt.pix.width = usbtv->width;
649 f->fmt.pix.height = usbtv->height;
650 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
651 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
652 f->fmt.pix.bytesperline = usbtv->width * 2;
653 f->fmt.pix.sizeimage = (f->fmt.pix.bytesperline * f->fmt.pix.height);
654 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
655
656 return 0;
657 }
658
usbtv_g_std(struct file * file,void * priv,v4l2_std_id * norm)659 static int usbtv_g_std(struct file *file, void *priv, v4l2_std_id *norm)
660 {
661 struct usbtv *usbtv = video_drvdata(file);
662 *norm = usbtv->norm;
663 return 0;
664 }
665
usbtv_s_std(struct file * file,void * priv,v4l2_std_id norm)666 static int usbtv_s_std(struct file *file, void *priv, v4l2_std_id norm)
667 {
668 int ret = -EINVAL;
669 struct usbtv *usbtv = video_drvdata(file);
670
671 if (norm & USBTV_TV_STD)
672 ret = usbtv_select_norm(usbtv, norm);
673
674 return ret;
675 }
676
usbtv_g_input(struct file * file,void * priv,unsigned int * i)677 static int usbtv_g_input(struct file *file, void *priv, unsigned int *i)
678 {
679 struct usbtv *usbtv = video_drvdata(file);
680 *i = usbtv->input;
681 return 0;
682 }
683
usbtv_s_input(struct file * file,void * priv,unsigned int i)684 static int usbtv_s_input(struct file *file, void *priv, unsigned int i)
685 {
686 struct usbtv *usbtv = video_drvdata(file);
687
688 return usbtv_select_input(usbtv, i);
689 }
690
691 static const struct v4l2_ioctl_ops usbtv_ioctl_ops = {
692 .vidioc_querycap = usbtv_querycap,
693 .vidioc_enum_input = usbtv_enum_input,
694 .vidioc_enum_fmt_vid_cap = usbtv_enum_fmt_vid_cap,
695 .vidioc_g_fmt_vid_cap = usbtv_fmt_vid_cap,
696 .vidioc_try_fmt_vid_cap = usbtv_fmt_vid_cap,
697 .vidioc_s_fmt_vid_cap = usbtv_fmt_vid_cap,
698 .vidioc_g_std = usbtv_g_std,
699 .vidioc_s_std = usbtv_s_std,
700 .vidioc_g_input = usbtv_g_input,
701 .vidioc_s_input = usbtv_s_input,
702
703 .vidioc_reqbufs = vb2_ioctl_reqbufs,
704 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
705 .vidioc_querybuf = vb2_ioctl_querybuf,
706 .vidioc_create_bufs = vb2_ioctl_create_bufs,
707 .vidioc_qbuf = vb2_ioctl_qbuf,
708 .vidioc_dqbuf = vb2_ioctl_dqbuf,
709 .vidioc_streamon = vb2_ioctl_streamon,
710 .vidioc_streamoff = vb2_ioctl_streamoff,
711 };
712
713 static const struct v4l2_file_operations usbtv_fops = {
714 .owner = THIS_MODULE,
715 .unlocked_ioctl = video_ioctl2,
716 .mmap = vb2_fop_mmap,
717 .open = v4l2_fh_open,
718 .release = vb2_fop_release,
719 .read = vb2_fop_read,
720 .poll = vb2_fop_poll,
721 };
722
usbtv_queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])723 static int usbtv_queue_setup(struct vb2_queue *vq,
724 unsigned int *nbuffers,
725 unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[])
726 {
727 struct usbtv *usbtv = vb2_get_drv_priv(vq);
728 unsigned size = USBTV_CHUNK * usbtv->n_chunks * 2 * sizeof(u32);
729
730 if (vq->num_buffers + *nbuffers < 2)
731 *nbuffers = 2 - vq->num_buffers;
732 if (*nplanes)
733 return sizes[0] < size ? -EINVAL : 0;
734 *nplanes = 1;
735 sizes[0] = size;
736
737 return 0;
738 }
739
usbtv_buf_queue(struct vb2_buffer * vb)740 static void usbtv_buf_queue(struct vb2_buffer *vb)
741 {
742 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
743 struct usbtv *usbtv = vb2_get_drv_priv(vb->vb2_queue);
744 struct usbtv_buf *buf = container_of(vbuf, struct usbtv_buf, vb);
745 unsigned long flags;
746
747 if (usbtv->udev == NULL) {
748 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
749 return;
750 }
751
752 spin_lock_irqsave(&usbtv->buflock, flags);
753 list_add_tail(&buf->list, &usbtv->bufs);
754 spin_unlock_irqrestore(&usbtv->buflock, flags);
755 }
756
usbtv_start_streaming(struct vb2_queue * vq,unsigned int count)757 static int usbtv_start_streaming(struct vb2_queue *vq, unsigned int count)
758 {
759 struct usbtv *usbtv = vb2_get_drv_priv(vq);
760
761 if (usbtv->udev == NULL)
762 return -ENODEV;
763
764 usbtv->last_odd = 1;
765 usbtv->sequence = 0;
766 return usbtv_start(usbtv);
767 }
768
usbtv_stop_streaming(struct vb2_queue * vq)769 static void usbtv_stop_streaming(struct vb2_queue *vq)
770 {
771 struct usbtv *usbtv = vb2_get_drv_priv(vq);
772
773 if (usbtv->udev)
774 usbtv_stop(usbtv);
775 }
776
777 static const struct vb2_ops usbtv_vb2_ops = {
778 .queue_setup = usbtv_queue_setup,
779 .buf_queue = usbtv_buf_queue,
780 .start_streaming = usbtv_start_streaming,
781 .stop_streaming = usbtv_stop_streaming,
782 .wait_prepare = vb2_ops_wait_prepare,
783 .wait_finish = vb2_ops_wait_finish,
784 };
785
usbtv_s_ctrl(struct v4l2_ctrl * ctrl)786 static int usbtv_s_ctrl(struct v4l2_ctrl *ctrl)
787 {
788 struct usbtv *usbtv = container_of(ctrl->handler, struct usbtv,
789 ctrl);
790 u8 *data;
791 u16 index, size;
792 int ret;
793
794 data = kmalloc(3, GFP_KERNEL);
795 if (!data)
796 return -ENOMEM;
797
798 /*
799 * Read in the current brightness/contrast registers. We need them
800 * both, because the values are for some reason interleaved.
801 */
802 if (ctrl->id == V4L2_CID_BRIGHTNESS || ctrl->id == V4L2_CID_CONTRAST) {
803 ret = usb_control_msg(usbtv->udev,
804 usb_rcvctrlpipe(usbtv->udev, 0), USBTV_CONTROL_REG,
805 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
806 0, USBTV_BASE + 0x0244, (void *)data, 3,
807 USB_CTRL_GET_TIMEOUT);
808 if (ret < 0)
809 goto error;
810 }
811
812 switch (ctrl->id) {
813 case V4L2_CID_BRIGHTNESS:
814 index = USBTV_BASE + 0x0244;
815 size = 3;
816 data[0] &= 0xf0;
817 data[0] |= (ctrl->val >> 8) & 0xf;
818 data[2] = ctrl->val & 0xff;
819 break;
820 case V4L2_CID_CONTRAST:
821 index = USBTV_BASE + 0x0244;
822 size = 3;
823 data[0] &= 0x0f;
824 data[0] |= (ctrl->val >> 4) & 0xf0;
825 data[1] = ctrl->val & 0xff;
826 break;
827 case V4L2_CID_SATURATION:
828 index = USBTV_BASE + 0x0242;
829 data[0] = ctrl->val >> 8;
830 data[1] = ctrl->val & 0xff;
831 size = 2;
832 break;
833 case V4L2_CID_HUE:
834 index = USBTV_BASE + 0x0240;
835 size = 2;
836 if (ctrl->val > 0) {
837 data[0] = 0x92 + (ctrl->val >> 8);
838 data[1] = ctrl->val & 0xff;
839 } else {
840 data[0] = 0x82 + (-ctrl->val >> 8);
841 data[1] = -ctrl->val & 0xff;
842 }
843 break;
844 case V4L2_CID_SHARPNESS:
845 index = USBTV_BASE + 0x0239;
846 data[0] = 0;
847 data[1] = ctrl->val;
848 size = 2;
849 break;
850 default:
851 kfree(data);
852 return -EINVAL;
853 }
854
855 ret = usb_control_msg(usbtv->udev, usb_sndctrlpipe(usbtv->udev, 0),
856 USBTV_CONTROL_REG,
857 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
858 0, index, (void *)data, size, USB_CTRL_SET_TIMEOUT);
859
860 error:
861 if (ret < 0)
862 dev_warn(usbtv->dev, "Failed to submit a control request.\n");
863
864 kfree(data);
865 return ret;
866 }
867
868 static const struct v4l2_ctrl_ops usbtv_ctrl_ops = {
869 .s_ctrl = usbtv_s_ctrl,
870 };
871
usbtv_release(struct v4l2_device * v4l2_dev)872 static void usbtv_release(struct v4l2_device *v4l2_dev)
873 {
874 struct usbtv *usbtv = container_of(v4l2_dev, struct usbtv, v4l2_dev);
875
876 v4l2_device_unregister(&usbtv->v4l2_dev);
877 v4l2_ctrl_handler_free(&usbtv->ctrl);
878 kfree(usbtv);
879 }
880
usbtv_video_init(struct usbtv * usbtv)881 int usbtv_video_init(struct usbtv *usbtv)
882 {
883 int ret;
884
885 (void)usbtv_configure_for_norm(usbtv, V4L2_STD_525_60);
886
887 spin_lock_init(&usbtv->buflock);
888 mutex_init(&usbtv->v4l2_lock);
889 mutex_init(&usbtv->vb2q_lock);
890 INIT_LIST_HEAD(&usbtv->bufs);
891
892 /* videobuf2 structure */
893 usbtv->vb2q.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
894 usbtv->vb2q.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
895 usbtv->vb2q.drv_priv = usbtv;
896 usbtv->vb2q.buf_struct_size = sizeof(struct usbtv_buf);
897 usbtv->vb2q.ops = &usbtv_vb2_ops;
898 usbtv->vb2q.mem_ops = &vb2_vmalloc_memops;
899 usbtv->vb2q.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
900 usbtv->vb2q.lock = &usbtv->vb2q_lock;
901 ret = vb2_queue_init(&usbtv->vb2q);
902 if (ret < 0) {
903 dev_warn(usbtv->dev, "Could not initialize videobuf2 queue\n");
904 return ret;
905 }
906
907 /* controls */
908 v4l2_ctrl_handler_init(&usbtv->ctrl, 4);
909 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops,
910 V4L2_CID_CONTRAST, 0, 0x3ff, 1, 0x1d0);
911 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops,
912 V4L2_CID_BRIGHTNESS, 0, 0x3ff, 1, 0x1c0);
913 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops,
914 V4L2_CID_SATURATION, 0, 0x3ff, 1, 0x200);
915 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops,
916 V4L2_CID_HUE, -0xdff, 0xdff, 1, 0x000);
917 v4l2_ctrl_new_std(&usbtv->ctrl, &usbtv_ctrl_ops,
918 V4L2_CID_SHARPNESS, 0x0, 0xff, 1, 0x60);
919 ret = usbtv->ctrl.error;
920 if (ret < 0) {
921 dev_warn(usbtv->dev, "Could not initialize controls\n");
922 goto ctrl_fail;
923 }
924
925 /* v4l2 structure */
926 usbtv->v4l2_dev.ctrl_handler = &usbtv->ctrl;
927 usbtv->v4l2_dev.release = usbtv_release;
928 ret = v4l2_device_register(usbtv->dev, &usbtv->v4l2_dev);
929 if (ret < 0) {
930 dev_warn(usbtv->dev, "Could not register v4l2 device\n");
931 goto v4l2_fail;
932 }
933
934 /* Video structure */
935 strscpy(usbtv->vdev.name, "usbtv", sizeof(usbtv->vdev.name));
936 usbtv->vdev.v4l2_dev = &usbtv->v4l2_dev;
937 usbtv->vdev.release = video_device_release_empty;
938 usbtv->vdev.fops = &usbtv_fops;
939 usbtv->vdev.ioctl_ops = &usbtv_ioctl_ops;
940 usbtv->vdev.tvnorms = USBTV_TV_STD;
941 usbtv->vdev.queue = &usbtv->vb2q;
942 usbtv->vdev.lock = &usbtv->v4l2_lock;
943 usbtv->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
944 V4L2_CAP_STREAMING;
945 video_set_drvdata(&usbtv->vdev, usbtv);
946 ret = video_register_device(&usbtv->vdev, VFL_TYPE_VIDEO, -1);
947 if (ret < 0) {
948 dev_warn(usbtv->dev, "Could not register video device\n");
949 goto vdev_fail;
950 }
951
952 return 0;
953
954 vdev_fail:
955 v4l2_device_unregister(&usbtv->v4l2_dev);
956 v4l2_fail:
957 ctrl_fail:
958 v4l2_ctrl_handler_free(&usbtv->ctrl);
959
960 return ret;
961 }
962
usbtv_video_free(struct usbtv * usbtv)963 void usbtv_video_free(struct usbtv *usbtv)
964 {
965 mutex_lock(&usbtv->vb2q_lock);
966 mutex_lock(&usbtv->v4l2_lock);
967
968 usbtv_stop(usbtv);
969 vb2_video_unregister_device(&usbtv->vdev);
970 v4l2_device_disconnect(&usbtv->v4l2_dev);
971
972 mutex_unlock(&usbtv->v4l2_lock);
973 mutex_unlock(&usbtv->vb2q_lock);
974
975 v4l2_device_put(&usbtv->v4l2_dev);
976 }
977