Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 1 | /* |
| 2 | * Fushicai USBTV007 Video Grabber Driver |
| 3 | * |
| 4 | * Product web site: |
| 5 | * http://www.fushicai.com/products_detail/&productId=d05449ee-b690-42f9-a661-aa7353894bed.html |
| 6 | * |
| 7 | * Following LWN articles were very useful in construction of this driver: |
| 8 | * Video4Linux2 API series: http://lwn.net/Articles/203924/ |
| 9 | * videobuf2 API explanation: http://lwn.net/Articles/447435/ |
| 10 | * Thanks go to Jonathan Corbet for providing this quality documentation. |
| 11 | * He is awesome. |
| 12 | * |
| 13 | * Copyright (c) 2013 Lubomir Rintel |
| 14 | * All rights reserved. |
| 15 | * No physical hardware was harmed running Windows during the |
| 16 | * reverse-engineering activity |
| 17 | * |
| 18 | * Redistribution and use in source and binary forms, with or without |
| 19 | * modification, are permitted provided that the following conditions |
| 20 | * are met: |
| 21 | * 1. Redistributions of source code must retain the above copyright |
| 22 | * notice, this list of conditions, and the following disclaimer, |
| 23 | * without modification. |
| 24 | * 2. The name of the author may not be used to endorse or promote products |
| 25 | * derived from this software without specific prior written permission. |
| 26 | * |
| 27 | * Alternatively, this software may be distributed under the terms of the |
| 28 | * GNU General Public License ("GPL"). |
| 29 | */ |
| 30 | |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 31 | #include <media/v4l2-ioctl.h> |
| 32 | #include <media/videobuf2-core.h> |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 33 | |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 34 | #include "usbtv.h" |
Georg Kaindl | 0e0fe39 | 2013-10-21 12:01:36 -0300 | [diff] [blame] | 35 | |
| 36 | static struct usbtv_norm_params norm_params[] = { |
| 37 | { |
| 38 | .norm = V4L2_STD_525_60, |
| 39 | .cap_width = 720, |
| 40 | .cap_height = 480, |
| 41 | }, |
| 42 | { |
| 43 | .norm = V4L2_STD_PAL, |
| 44 | .cap_width = 720, |
| 45 | .cap_height = 576, |
| 46 | } |
| 47 | }; |
| 48 | |
Georg Kaindl | 0e0fe39 | 2013-10-21 12:01:36 -0300 | [diff] [blame] | 49 | static int usbtv_configure_for_norm(struct usbtv *usbtv, v4l2_std_id norm) |
| 50 | { |
| 51 | int i, ret = 0; |
| 52 | struct usbtv_norm_params *params = NULL; |
| 53 | |
| 54 | for (i = 0; i < ARRAY_SIZE(norm_params); i++) { |
| 55 | if (norm_params[i].norm & norm) { |
| 56 | params = &norm_params[i]; |
| 57 | break; |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | if (params) { |
| 62 | usbtv->width = params->cap_width; |
| 63 | usbtv->height = params->cap_height; |
| 64 | usbtv->n_chunks = usbtv->width * usbtv->height |
| 65 | / 4 / USBTV_CHUNK; |
| 66 | usbtv->norm = params->norm; |
| 67 | } else |
| 68 | ret = -EINVAL; |
| 69 | |
| 70 | return ret; |
| 71 | } |
| 72 | |
Lubomir Rintel | 2206112 | 2013-07-12 05:03:03 -0300 | [diff] [blame] | 73 | static int usbtv_select_input(struct usbtv *usbtv, int input) |
| 74 | { |
| 75 | int ret; |
| 76 | |
| 77 | static const u16 composite[][2] = { |
| 78 | { USBTV_BASE + 0x0105, 0x0060 }, |
| 79 | { USBTV_BASE + 0x011f, 0x00f2 }, |
| 80 | { USBTV_BASE + 0x0127, 0x0060 }, |
| 81 | { USBTV_BASE + 0x00ae, 0x0010 }, |
| 82 | { USBTV_BASE + 0x0284, 0x00aa }, |
| 83 | { USBTV_BASE + 0x0239, 0x0060 }, |
| 84 | }; |
| 85 | |
| 86 | static const u16 svideo[][2] = { |
| 87 | { USBTV_BASE + 0x0105, 0x0010 }, |
| 88 | { USBTV_BASE + 0x011f, 0x00ff }, |
| 89 | { USBTV_BASE + 0x0127, 0x0060 }, |
| 90 | { USBTV_BASE + 0x00ae, 0x0030 }, |
| 91 | { USBTV_BASE + 0x0284, 0x0088 }, |
| 92 | { USBTV_BASE + 0x0239, 0x0060 }, |
| 93 | }; |
| 94 | |
| 95 | switch (input) { |
| 96 | case USBTV_COMPOSITE_INPUT: |
| 97 | ret = usbtv_set_regs(usbtv, composite, ARRAY_SIZE(composite)); |
| 98 | break; |
| 99 | case USBTV_SVIDEO_INPUT: |
| 100 | ret = usbtv_set_regs(usbtv, svideo, ARRAY_SIZE(svideo)); |
| 101 | break; |
| 102 | default: |
| 103 | ret = -EINVAL; |
| 104 | } |
| 105 | |
| 106 | if (!ret) |
| 107 | usbtv->input = input; |
| 108 | |
| 109 | return ret; |
| 110 | } |
| 111 | |
Georg Kaindl | 0e0fe39 | 2013-10-21 12:01:36 -0300 | [diff] [blame] | 112 | static int usbtv_select_norm(struct usbtv *usbtv, v4l2_std_id norm) |
| 113 | { |
| 114 | int ret; |
| 115 | static const u16 pal[][2] = { |
| 116 | { USBTV_BASE + 0x001a, 0x0068 }, |
| 117 | { USBTV_BASE + 0x010e, 0x0072 }, |
| 118 | { USBTV_BASE + 0x010f, 0x00a2 }, |
| 119 | { USBTV_BASE + 0x0112, 0x00b0 }, |
| 120 | { USBTV_BASE + 0x0117, 0x0001 }, |
| 121 | { USBTV_BASE + 0x0118, 0x002c }, |
| 122 | { USBTV_BASE + 0x012d, 0x0010 }, |
| 123 | { USBTV_BASE + 0x012f, 0x0020 }, |
| 124 | { USBTV_BASE + 0x024f, 0x0002 }, |
| 125 | { USBTV_BASE + 0x0254, 0x0059 }, |
| 126 | { USBTV_BASE + 0x025a, 0x0016 }, |
| 127 | { USBTV_BASE + 0x025b, 0x0035 }, |
| 128 | { USBTV_BASE + 0x0263, 0x0017 }, |
| 129 | { USBTV_BASE + 0x0266, 0x0016 }, |
| 130 | { USBTV_BASE + 0x0267, 0x0036 } |
| 131 | }; |
| 132 | |
| 133 | static const u16 ntsc[][2] = { |
| 134 | { USBTV_BASE + 0x001a, 0x0079 }, |
| 135 | { USBTV_BASE + 0x010e, 0x0068 }, |
| 136 | { USBTV_BASE + 0x010f, 0x009c }, |
| 137 | { USBTV_BASE + 0x0112, 0x00f0 }, |
| 138 | { USBTV_BASE + 0x0117, 0x0000 }, |
| 139 | { USBTV_BASE + 0x0118, 0x00fc }, |
| 140 | { USBTV_BASE + 0x012d, 0x0004 }, |
| 141 | { USBTV_BASE + 0x012f, 0x0008 }, |
| 142 | { USBTV_BASE + 0x024f, 0x0001 }, |
| 143 | { USBTV_BASE + 0x0254, 0x005f }, |
| 144 | { USBTV_BASE + 0x025a, 0x0012 }, |
| 145 | { USBTV_BASE + 0x025b, 0x0001 }, |
| 146 | { USBTV_BASE + 0x0263, 0x001c }, |
| 147 | { USBTV_BASE + 0x0266, 0x0011 }, |
| 148 | { USBTV_BASE + 0x0267, 0x0005 } |
| 149 | }; |
| 150 | |
| 151 | ret = usbtv_configure_for_norm(usbtv, norm); |
| 152 | |
| 153 | if (!ret) { |
| 154 | if (norm & V4L2_STD_525_60) |
| 155 | ret = usbtv_set_regs(usbtv, ntsc, ARRAY_SIZE(ntsc)); |
| 156 | else if (norm & V4L2_STD_PAL) |
| 157 | ret = usbtv_set_regs(usbtv, pal, ARRAY_SIZE(pal)); |
| 158 | } |
| 159 | |
| 160 | return ret; |
| 161 | } |
| 162 | |
Lubomir Rintel | 2206112 | 2013-07-12 05:03:03 -0300 | [diff] [blame] | 163 | static int usbtv_setup_capture(struct usbtv *usbtv) |
| 164 | { |
| 165 | int ret; |
| 166 | static const u16 setup[][2] = { |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 167 | /* These seem to enable the device. */ |
| 168 | { USBTV_BASE + 0x0008, 0x0001 }, |
| 169 | { USBTV_BASE + 0x01d0, 0x00ff }, |
| 170 | { USBTV_BASE + 0x01d9, 0x0002 }, |
| 171 | |
| 172 | /* These seem to influence color parameters, such as |
| 173 | * brightness, etc. */ |
| 174 | { USBTV_BASE + 0x0239, 0x0040 }, |
| 175 | { USBTV_BASE + 0x0240, 0x0000 }, |
| 176 | { USBTV_BASE + 0x0241, 0x0000 }, |
| 177 | { USBTV_BASE + 0x0242, 0x0002 }, |
| 178 | { USBTV_BASE + 0x0243, 0x0080 }, |
| 179 | { USBTV_BASE + 0x0244, 0x0012 }, |
| 180 | { USBTV_BASE + 0x0245, 0x0090 }, |
| 181 | { USBTV_BASE + 0x0246, 0x0000 }, |
| 182 | |
| 183 | { USBTV_BASE + 0x0278, 0x002d }, |
| 184 | { USBTV_BASE + 0x0279, 0x000a }, |
| 185 | { USBTV_BASE + 0x027a, 0x0032 }, |
| 186 | { 0xf890, 0x000c }, |
| 187 | { 0xf894, 0x0086 }, |
| 188 | |
| 189 | { USBTV_BASE + 0x00ac, 0x00c0 }, |
| 190 | { USBTV_BASE + 0x00ad, 0x0000 }, |
| 191 | { USBTV_BASE + 0x00a2, 0x0012 }, |
| 192 | { USBTV_BASE + 0x00a3, 0x00e0 }, |
| 193 | { USBTV_BASE + 0x00a4, 0x0028 }, |
| 194 | { USBTV_BASE + 0x00a5, 0x0082 }, |
| 195 | { USBTV_BASE + 0x00a7, 0x0080 }, |
| 196 | { USBTV_BASE + 0x0000, 0x0014 }, |
| 197 | { USBTV_BASE + 0x0006, 0x0003 }, |
| 198 | { USBTV_BASE + 0x0090, 0x0099 }, |
| 199 | { USBTV_BASE + 0x0091, 0x0090 }, |
| 200 | { USBTV_BASE + 0x0094, 0x0068 }, |
| 201 | { USBTV_BASE + 0x0095, 0x0070 }, |
| 202 | { USBTV_BASE + 0x009c, 0x0030 }, |
| 203 | { USBTV_BASE + 0x009d, 0x00c0 }, |
| 204 | { USBTV_BASE + 0x009e, 0x00e0 }, |
| 205 | { USBTV_BASE + 0x0019, 0x0006 }, |
| 206 | { USBTV_BASE + 0x008c, 0x00ba }, |
| 207 | { USBTV_BASE + 0x0101, 0x00ff }, |
| 208 | { USBTV_BASE + 0x010c, 0x00b3 }, |
| 209 | { USBTV_BASE + 0x01b2, 0x0080 }, |
| 210 | { USBTV_BASE + 0x01b4, 0x00a0 }, |
| 211 | { USBTV_BASE + 0x014c, 0x00ff }, |
| 212 | { USBTV_BASE + 0x014d, 0x00ca }, |
| 213 | { USBTV_BASE + 0x0113, 0x0053 }, |
| 214 | { USBTV_BASE + 0x0119, 0x008a }, |
| 215 | { USBTV_BASE + 0x013c, 0x0003 }, |
| 216 | { USBTV_BASE + 0x0150, 0x009c }, |
| 217 | { USBTV_BASE + 0x0151, 0x0071 }, |
| 218 | { USBTV_BASE + 0x0152, 0x00c6 }, |
| 219 | { USBTV_BASE + 0x0153, 0x0084 }, |
| 220 | { USBTV_BASE + 0x0154, 0x00bc }, |
| 221 | { USBTV_BASE + 0x0155, 0x00a0 }, |
| 222 | { USBTV_BASE + 0x0156, 0x00a0 }, |
| 223 | { USBTV_BASE + 0x0157, 0x009c }, |
| 224 | { USBTV_BASE + 0x0158, 0x001f }, |
| 225 | { USBTV_BASE + 0x0159, 0x0006 }, |
| 226 | { USBTV_BASE + 0x015d, 0x0000 }, |
| 227 | |
| 228 | { USBTV_BASE + 0x0284, 0x0088 }, |
| 229 | { USBTV_BASE + 0x0003, 0x0004 }, |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 230 | { USBTV_BASE + 0x0100, 0x00d3 }, |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 231 | { USBTV_BASE + 0x0115, 0x0015 }, |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 232 | { USBTV_BASE + 0x0220, 0x002e }, |
| 233 | { USBTV_BASE + 0x0225, 0x0008 }, |
| 234 | { USBTV_BASE + 0x024e, 0x0002 }, |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 235 | { USBTV_BASE + 0x024e, 0x0002 }, |
| 236 | { USBTV_BASE + 0x024f, 0x0002 }, |
| 237 | }; |
| 238 | |
Lubomir Rintel | 2206112 | 2013-07-12 05:03:03 -0300 | [diff] [blame] | 239 | ret = usbtv_set_regs(usbtv, setup, ARRAY_SIZE(setup)); |
| 240 | if (ret) |
| 241 | return ret; |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 242 | |
Georg Kaindl | 0e0fe39 | 2013-10-21 12:01:36 -0300 | [diff] [blame] | 243 | ret = usbtv_select_norm(usbtv, usbtv->norm); |
| 244 | if (ret) |
| 245 | return ret; |
| 246 | |
Lubomir Rintel | 2206112 | 2013-07-12 05:03:03 -0300 | [diff] [blame] | 247 | ret = usbtv_select_input(usbtv, usbtv->input); |
| 248 | if (ret) |
| 249 | return ret; |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 250 | |
| 251 | return 0; |
| 252 | } |
| 253 | |
Lubomir Rintel | 3080072 | 2013-07-02 07:56:38 -0300 | [diff] [blame] | 254 | /* Copy data from chunk into a frame buffer, deinterlacing the data |
| 255 | * into every second line. Unfortunately, they don't align nicely into |
| 256 | * 720 pixel lines, as the chunk is 240 words long, which is 480 pixels. |
| 257 | * Therefore, we break down the chunk into two halves before copyting, |
| 258 | * so that we can interleave a line if needed. */ |
| 259 | static void usbtv_chunk_to_vbuf(u32 *frame, u32 *src, int chunk_no, int odd) |
| 260 | { |
| 261 | int half; |
| 262 | |
| 263 | for (half = 0; half < 2; half++) { |
| 264 | int part_no = chunk_no * 2 + half; |
| 265 | int line = part_no / 3; |
| 266 | int part_index = (line * 2 + !odd) * 3 + (part_no % 3); |
| 267 | |
| 268 | u32 *dst = &frame[part_index * USBTV_CHUNK/2]; |
| 269 | memcpy(dst, src, USBTV_CHUNK/2 * sizeof(*src)); |
| 270 | src += USBTV_CHUNK/2; |
| 271 | } |
| 272 | } |
| 273 | |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 274 | /* Called for each 256-byte image chunk. |
| 275 | * First word identifies the chunk, followed by 240 words of image |
| 276 | * data and padding. */ |
| 277 | static void usbtv_image_chunk(struct usbtv *usbtv, u32 *chunk) |
| 278 | { |
| 279 | int frame_id, odd, chunk_no; |
| 280 | u32 *frame; |
| 281 | struct usbtv_buf *buf; |
| 282 | unsigned long flags; |
| 283 | |
| 284 | /* Ignore corrupted lines. */ |
| 285 | if (!USBTV_MAGIC_OK(chunk)) |
| 286 | return; |
| 287 | frame_id = USBTV_FRAME_ID(chunk); |
| 288 | odd = USBTV_ODD(chunk); |
| 289 | chunk_no = USBTV_CHUNK_NO(chunk); |
Georg Kaindl | 0e0fe39 | 2013-10-21 12:01:36 -0300 | [diff] [blame] | 290 | if (chunk_no >= usbtv->n_chunks) |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 291 | return; |
| 292 | |
| 293 | /* Beginning of a frame. */ |
Lubomir Rintel | 6ee0faa | 2013-07-02 07:56:39 -0300 | [diff] [blame] | 294 | if (chunk_no == 0) { |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 295 | usbtv->frame_id = frame_id; |
Lubomir Rintel | 6ee0faa | 2013-07-02 07:56:39 -0300 | [diff] [blame] | 296 | usbtv->chunks_done = 0; |
| 297 | } |
| 298 | |
| 299 | if (usbtv->frame_id != frame_id) |
| 300 | return; |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 301 | |
| 302 | spin_lock_irqsave(&usbtv->buflock, flags); |
| 303 | if (list_empty(&usbtv->bufs)) { |
| 304 | /* No free buffers. Userspace likely too slow. */ |
| 305 | spin_unlock_irqrestore(&usbtv->buflock, flags); |
| 306 | return; |
| 307 | } |
| 308 | |
| 309 | /* First available buffer. */ |
| 310 | buf = list_first_entry(&usbtv->bufs, struct usbtv_buf, list); |
| 311 | frame = vb2_plane_vaddr(&buf->vb, 0); |
| 312 | |
Lubomir Rintel | 3080072 | 2013-07-02 07:56:38 -0300 | [diff] [blame] | 313 | /* Copy the chunk data. */ |
| 314 | usbtv_chunk_to_vbuf(frame, &chunk[1], chunk_no, odd); |
Lubomir Rintel | 6ee0faa | 2013-07-02 07:56:39 -0300 | [diff] [blame] | 315 | usbtv->chunks_done++; |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 316 | |
| 317 | /* Last chunk in a frame, signalling an end */ |
Georg Kaindl | 0e0fe39 | 2013-10-21 12:01:36 -0300 | [diff] [blame] | 318 | if (odd && chunk_no == usbtv->n_chunks-1) { |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 319 | int size = vb2_plane_size(&buf->vb, 0); |
Lubomir Rintel | 6ee0faa | 2013-07-02 07:56:39 -0300 | [diff] [blame] | 320 | enum vb2_buffer_state state = usbtv->chunks_done == |
Georg Kaindl | 0e0fe39 | 2013-10-21 12:01:36 -0300 | [diff] [blame] | 321 | usbtv->n_chunks ? |
Lubomir Rintel | 6ee0faa | 2013-07-02 07:56:39 -0300 | [diff] [blame] | 322 | VB2_BUF_STATE_DONE : |
| 323 | VB2_BUF_STATE_ERROR; |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 324 | |
| 325 | buf->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED; |
| 326 | buf->vb.v4l2_buf.sequence = usbtv->sequence++; |
| 327 | v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp); |
| 328 | vb2_set_plane_payload(&buf->vb, 0, size); |
Lubomir Rintel | 6ee0faa | 2013-07-02 07:56:39 -0300 | [diff] [blame] | 329 | vb2_buffer_done(&buf->vb, state); |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 330 | list_del(&buf->list); |
| 331 | } |
| 332 | |
| 333 | spin_unlock_irqrestore(&usbtv->buflock, flags); |
| 334 | } |
| 335 | |
| 336 | /* Got image data. Each packet contains a number of 256-word chunks we |
| 337 | * compose the image from. */ |
| 338 | static void usbtv_iso_cb(struct urb *ip) |
| 339 | { |
| 340 | int ret; |
| 341 | int i; |
| 342 | struct usbtv *usbtv = (struct usbtv *)ip->context; |
| 343 | |
| 344 | switch (ip->status) { |
| 345 | /* All fine. */ |
| 346 | case 0: |
| 347 | break; |
| 348 | /* Device disconnected or capture stopped? */ |
| 349 | case -ENODEV: |
| 350 | case -ENOENT: |
| 351 | case -ECONNRESET: |
| 352 | case -ESHUTDOWN: |
| 353 | return; |
| 354 | /* Unknown error. Retry. */ |
| 355 | default: |
| 356 | dev_warn(usbtv->dev, "Bad response for ISO request.\n"); |
| 357 | goto resubmit; |
| 358 | } |
| 359 | |
| 360 | for (i = 0; i < ip->number_of_packets; i++) { |
| 361 | int size = ip->iso_frame_desc[i].actual_length; |
| 362 | unsigned char *data = ip->transfer_buffer + |
| 363 | ip->iso_frame_desc[i].offset; |
| 364 | int offset; |
| 365 | |
| 366 | for (offset = 0; USBTV_CHUNK_SIZE * offset < size; offset++) |
| 367 | usbtv_image_chunk(usbtv, |
| 368 | (u32 *)&data[USBTV_CHUNK_SIZE * offset]); |
| 369 | } |
| 370 | |
| 371 | resubmit: |
| 372 | ret = usb_submit_urb(ip, GFP_ATOMIC); |
| 373 | if (ret < 0) |
| 374 | dev_warn(usbtv->dev, "Could not resubmit ISO URB\n"); |
| 375 | } |
| 376 | |
| 377 | static struct urb *usbtv_setup_iso_transfer(struct usbtv *usbtv) |
| 378 | { |
| 379 | struct urb *ip; |
| 380 | int size = usbtv->iso_size; |
| 381 | int i; |
| 382 | |
| 383 | ip = usb_alloc_urb(USBTV_ISOC_PACKETS, GFP_KERNEL); |
| 384 | if (ip == NULL) |
| 385 | return NULL; |
| 386 | |
| 387 | ip->dev = usbtv->udev; |
| 388 | ip->context = usbtv; |
| 389 | ip->pipe = usb_rcvisocpipe(usbtv->udev, USBTV_VIDEO_ENDP); |
| 390 | ip->interval = 1; |
| 391 | ip->transfer_flags = URB_ISO_ASAP; |
| 392 | ip->transfer_buffer = kzalloc(size * USBTV_ISOC_PACKETS, |
| 393 | GFP_KERNEL); |
| 394 | ip->complete = usbtv_iso_cb; |
| 395 | ip->number_of_packets = USBTV_ISOC_PACKETS; |
| 396 | ip->transfer_buffer_length = size * USBTV_ISOC_PACKETS; |
| 397 | for (i = 0; i < USBTV_ISOC_PACKETS; i++) { |
| 398 | ip->iso_frame_desc[i].offset = size * i; |
| 399 | ip->iso_frame_desc[i].length = size; |
| 400 | } |
| 401 | |
| 402 | return ip; |
| 403 | } |
| 404 | |
| 405 | static void usbtv_stop(struct usbtv *usbtv) |
| 406 | { |
| 407 | int i; |
| 408 | unsigned long flags; |
| 409 | |
| 410 | /* Cancel running transfers. */ |
| 411 | for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) { |
| 412 | struct urb *ip = usbtv->isoc_urbs[i]; |
| 413 | if (ip == NULL) |
| 414 | continue; |
| 415 | usb_kill_urb(ip); |
| 416 | kfree(ip->transfer_buffer); |
| 417 | usb_free_urb(ip); |
| 418 | usbtv->isoc_urbs[i] = NULL; |
| 419 | } |
| 420 | |
| 421 | /* Return buffers to userspace. */ |
| 422 | spin_lock_irqsave(&usbtv->buflock, flags); |
| 423 | while (!list_empty(&usbtv->bufs)) { |
| 424 | struct usbtv_buf *buf = list_first_entry(&usbtv->bufs, |
| 425 | struct usbtv_buf, list); |
| 426 | vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR); |
| 427 | list_del(&buf->list); |
| 428 | } |
| 429 | spin_unlock_irqrestore(&usbtv->buflock, flags); |
| 430 | } |
| 431 | |
| 432 | static int usbtv_start(struct usbtv *usbtv) |
| 433 | { |
| 434 | int i; |
| 435 | int ret; |
| 436 | |
| 437 | ret = usb_set_interface(usbtv->udev, 0, 0); |
| 438 | if (ret < 0) |
| 439 | return ret; |
| 440 | |
| 441 | ret = usbtv_setup_capture(usbtv); |
| 442 | if (ret < 0) |
| 443 | return ret; |
| 444 | |
| 445 | ret = usb_set_interface(usbtv->udev, 0, 1); |
| 446 | if (ret < 0) |
| 447 | return ret; |
| 448 | |
| 449 | for (i = 0; i < USBTV_ISOC_TRANSFERS; i++) { |
| 450 | struct urb *ip; |
| 451 | |
| 452 | ip = usbtv_setup_iso_transfer(usbtv); |
| 453 | if (ip == NULL) { |
| 454 | ret = -ENOMEM; |
| 455 | goto start_fail; |
| 456 | } |
| 457 | usbtv->isoc_urbs[i] = ip; |
| 458 | |
| 459 | ret = usb_submit_urb(ip, GFP_KERNEL); |
| 460 | if (ret < 0) |
| 461 | goto start_fail; |
| 462 | } |
| 463 | |
| 464 | return 0; |
| 465 | |
| 466 | start_fail: |
| 467 | usbtv_stop(usbtv); |
| 468 | return ret; |
| 469 | } |
| 470 | |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 471 | static int usbtv_querycap(struct file *file, void *priv, |
| 472 | struct v4l2_capability *cap) |
| 473 | { |
| 474 | struct usbtv *dev = video_drvdata(file); |
| 475 | |
| 476 | strlcpy(cap->driver, "usbtv", sizeof(cap->driver)); |
| 477 | strlcpy(cap->card, "usbtv", sizeof(cap->card)); |
| 478 | usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info)); |
| 479 | cap->device_caps = V4L2_CAP_VIDEO_CAPTURE; |
| 480 | cap->device_caps |= V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; |
| 481 | cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; |
| 482 | return 0; |
| 483 | } |
| 484 | |
| 485 | static int usbtv_enum_input(struct file *file, void *priv, |
| 486 | struct v4l2_input *i) |
| 487 | { |
Georg Kaindl | 0e0fe39 | 2013-10-21 12:01:36 -0300 | [diff] [blame] | 488 | struct usbtv *dev = video_drvdata(file); |
| 489 | |
Lubomir Rintel | 2206112 | 2013-07-12 05:03:03 -0300 | [diff] [blame] | 490 | switch (i->index) { |
| 491 | case USBTV_COMPOSITE_INPUT: |
| 492 | strlcpy(i->name, "Composite", sizeof(i->name)); |
| 493 | break; |
| 494 | case USBTV_SVIDEO_INPUT: |
| 495 | strlcpy(i->name, "S-Video", sizeof(i->name)); |
| 496 | break; |
| 497 | default: |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 498 | return -EINVAL; |
Lubomir Rintel | 2206112 | 2013-07-12 05:03:03 -0300 | [diff] [blame] | 499 | } |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 500 | |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 501 | i->type = V4L2_INPUT_TYPE_CAMERA; |
Georg Kaindl | 0e0fe39 | 2013-10-21 12:01:36 -0300 | [diff] [blame] | 502 | i->std = dev->vdev.tvnorms; |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 503 | return 0; |
| 504 | } |
| 505 | |
| 506 | static int usbtv_enum_fmt_vid_cap(struct file *file, void *priv, |
| 507 | struct v4l2_fmtdesc *f) |
| 508 | { |
| 509 | if (f->index > 0) |
| 510 | return -EINVAL; |
| 511 | |
| 512 | strlcpy(f->description, "16 bpp YUY2, 4:2:2, packed", |
| 513 | sizeof(f->description)); |
| 514 | f->pixelformat = V4L2_PIX_FMT_YUYV; |
| 515 | return 0; |
| 516 | } |
| 517 | |
| 518 | static int usbtv_fmt_vid_cap(struct file *file, void *priv, |
| 519 | struct v4l2_format *f) |
| 520 | { |
Georg Kaindl | 0e0fe39 | 2013-10-21 12:01:36 -0300 | [diff] [blame] | 521 | struct usbtv *usbtv = video_drvdata(file); |
| 522 | |
| 523 | f->fmt.pix.width = usbtv->width; |
| 524 | f->fmt.pix.height = usbtv->height; |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 525 | f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV; |
| 526 | f->fmt.pix.field = V4L2_FIELD_INTERLACED; |
Georg Kaindl | 0e0fe39 | 2013-10-21 12:01:36 -0300 | [diff] [blame] | 527 | f->fmt.pix.bytesperline = usbtv->width * 2; |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 528 | f->fmt.pix.sizeimage = (f->fmt.pix.bytesperline * f->fmt.pix.height); |
| 529 | f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; |
Georg Kaindl | 0e0fe39 | 2013-10-21 12:01:36 -0300 | [diff] [blame] | 530 | |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 531 | return 0; |
| 532 | } |
| 533 | |
| 534 | static int usbtv_g_std(struct file *file, void *priv, v4l2_std_id *norm) |
| 535 | { |
Georg Kaindl | 0e0fe39 | 2013-10-21 12:01:36 -0300 | [diff] [blame] | 536 | struct usbtv *usbtv = video_drvdata(file); |
| 537 | *norm = usbtv->norm; |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 538 | return 0; |
| 539 | } |
| 540 | |
Georg Kaindl | 0e0fe39 | 2013-10-21 12:01:36 -0300 | [diff] [blame] | 541 | static int usbtv_s_std(struct file *file, void *priv, v4l2_std_id norm) |
| 542 | { |
| 543 | int ret = -EINVAL; |
| 544 | struct usbtv *usbtv = video_drvdata(file); |
| 545 | |
| 546 | if ((norm & V4L2_STD_525_60) || (norm & V4L2_STD_PAL)) |
| 547 | ret = usbtv_select_norm(usbtv, norm); |
| 548 | |
| 549 | return ret; |
| 550 | } |
| 551 | |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 552 | static int usbtv_g_input(struct file *file, void *priv, unsigned int *i) |
| 553 | { |
Lubomir Rintel | 2206112 | 2013-07-12 05:03:03 -0300 | [diff] [blame] | 554 | struct usbtv *usbtv = video_drvdata(file); |
| 555 | *i = usbtv->input; |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 556 | return 0; |
| 557 | } |
| 558 | |
| 559 | static int usbtv_s_input(struct file *file, void *priv, unsigned int i) |
| 560 | { |
Lubomir Rintel | 2206112 | 2013-07-12 05:03:03 -0300 | [diff] [blame] | 561 | struct usbtv *usbtv = video_drvdata(file); |
| 562 | return usbtv_select_input(usbtv, i); |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 563 | } |
| 564 | |
Fengguang Wu | 9b05837 | 2014-02-04 06:02:02 -0300 | [diff] [blame] | 565 | static struct v4l2_ioctl_ops usbtv_ioctl_ops = { |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 566 | .vidioc_querycap = usbtv_querycap, |
| 567 | .vidioc_enum_input = usbtv_enum_input, |
| 568 | .vidioc_enum_fmt_vid_cap = usbtv_enum_fmt_vid_cap, |
| 569 | .vidioc_g_fmt_vid_cap = usbtv_fmt_vid_cap, |
| 570 | .vidioc_try_fmt_vid_cap = usbtv_fmt_vid_cap, |
| 571 | .vidioc_s_fmt_vid_cap = usbtv_fmt_vid_cap, |
| 572 | .vidioc_g_std = usbtv_g_std, |
| 573 | .vidioc_s_std = usbtv_s_std, |
| 574 | .vidioc_g_input = usbtv_g_input, |
| 575 | .vidioc_s_input = usbtv_s_input, |
| 576 | |
| 577 | .vidioc_reqbufs = vb2_ioctl_reqbufs, |
| 578 | .vidioc_prepare_buf = vb2_ioctl_prepare_buf, |
| 579 | .vidioc_querybuf = vb2_ioctl_querybuf, |
| 580 | .vidioc_create_bufs = vb2_ioctl_create_bufs, |
| 581 | .vidioc_qbuf = vb2_ioctl_qbuf, |
| 582 | .vidioc_dqbuf = vb2_ioctl_dqbuf, |
| 583 | .vidioc_streamon = vb2_ioctl_streamon, |
| 584 | .vidioc_streamoff = vb2_ioctl_streamoff, |
| 585 | }; |
| 586 | |
Fengguang Wu | 9b05837 | 2014-02-04 06:02:02 -0300 | [diff] [blame] | 587 | static struct v4l2_file_operations usbtv_fops = { |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 588 | .owner = THIS_MODULE, |
| 589 | .unlocked_ioctl = video_ioctl2, |
| 590 | .mmap = vb2_fop_mmap, |
| 591 | .open = v4l2_fh_open, |
| 592 | .release = vb2_fop_release, |
| 593 | .read = vb2_fop_read, |
| 594 | .poll = vb2_fop_poll, |
| 595 | }; |
| 596 | |
| 597 | static int usbtv_queue_setup(struct vb2_queue *vq, |
| 598 | const struct v4l2_format *v4l_fmt, unsigned int *nbuffers, |
| 599 | unsigned int *nplanes, unsigned int sizes[], void *alloc_ctxs[]) |
| 600 | { |
Georg Kaindl | 0e0fe39 | 2013-10-21 12:01:36 -0300 | [diff] [blame] | 601 | struct usbtv *usbtv = vb2_get_drv_priv(vq); |
| 602 | |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 603 | if (*nbuffers < 2) |
| 604 | *nbuffers = 2; |
| 605 | *nplanes = 1; |
Georg Kaindl | 0e0fe39 | 2013-10-21 12:01:36 -0300 | [diff] [blame] | 606 | sizes[0] = USBTV_CHUNK * usbtv->n_chunks * 2 * sizeof(u32); |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 607 | |
| 608 | return 0; |
| 609 | } |
| 610 | |
| 611 | static void usbtv_buf_queue(struct vb2_buffer *vb) |
| 612 | { |
| 613 | struct usbtv *usbtv = vb2_get_drv_priv(vb->vb2_queue); |
| 614 | struct usbtv_buf *buf = container_of(vb, struct usbtv_buf, vb); |
| 615 | unsigned long flags; |
| 616 | |
| 617 | if (usbtv->udev == NULL) { |
| 618 | vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); |
| 619 | return; |
| 620 | } |
| 621 | |
| 622 | spin_lock_irqsave(&usbtv->buflock, flags); |
| 623 | list_add_tail(&buf->list, &usbtv->bufs); |
| 624 | spin_unlock_irqrestore(&usbtv->buflock, flags); |
| 625 | } |
| 626 | |
| 627 | static int usbtv_start_streaming(struct vb2_queue *vq, unsigned int count) |
| 628 | { |
| 629 | struct usbtv *usbtv = vb2_get_drv_priv(vq); |
| 630 | |
| 631 | if (usbtv->udev == NULL) |
| 632 | return -ENODEV; |
| 633 | |
| 634 | return usbtv_start(usbtv); |
| 635 | } |
| 636 | |
Hans Verkuil | e37559b | 2014-04-17 02:47:21 -0300 | [diff] [blame^] | 637 | static void usbtv_stop_streaming(struct vb2_queue *vq) |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 638 | { |
| 639 | struct usbtv *usbtv = vb2_get_drv_priv(vq); |
| 640 | |
Hans Verkuil | e37559b | 2014-04-17 02:47:21 -0300 | [diff] [blame^] | 641 | if (usbtv->udev) |
| 642 | usbtv_stop(usbtv); |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 643 | } |
| 644 | |
Fengguang Wu | 9b05837 | 2014-02-04 06:02:02 -0300 | [diff] [blame] | 645 | static struct vb2_ops usbtv_vb2_ops = { |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 646 | .queue_setup = usbtv_queue_setup, |
| 647 | .buf_queue = usbtv_buf_queue, |
| 648 | .start_streaming = usbtv_start_streaming, |
| 649 | .stop_streaming = usbtv_stop_streaming, |
| 650 | }; |
| 651 | |
| 652 | static void usbtv_release(struct v4l2_device *v4l2_dev) |
| 653 | { |
| 654 | struct usbtv *usbtv = container_of(v4l2_dev, struct usbtv, v4l2_dev); |
| 655 | |
| 656 | v4l2_device_unregister(&usbtv->v4l2_dev); |
| 657 | vb2_queue_release(&usbtv->vb2q); |
| 658 | kfree(usbtv); |
| 659 | } |
| 660 | |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 661 | int usbtv_video_init(struct usbtv *usbtv) |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 662 | { |
| 663 | int ret; |
Georg Kaindl | 0e0fe39 | 2013-10-21 12:01:36 -0300 | [diff] [blame] | 664 | |
| 665 | (void)usbtv_configure_for_norm(usbtv, V4L2_STD_525_60); |
| 666 | |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 667 | spin_lock_init(&usbtv->buflock); |
| 668 | mutex_init(&usbtv->v4l2_lock); |
| 669 | mutex_init(&usbtv->vb2q_lock); |
| 670 | INIT_LIST_HEAD(&usbtv->bufs); |
| 671 | |
| 672 | /* videobuf2 structure */ |
| 673 | usbtv->vb2q.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| 674 | usbtv->vb2q.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ; |
| 675 | usbtv->vb2q.drv_priv = usbtv; |
| 676 | usbtv->vb2q.buf_struct_size = sizeof(struct usbtv_buf); |
| 677 | usbtv->vb2q.ops = &usbtv_vb2_ops; |
| 678 | usbtv->vb2q.mem_ops = &vb2_vmalloc_memops; |
Sakari Ailus | ade4868 | 2014-02-25 19:12:19 -0300 | [diff] [blame] | 679 | usbtv->vb2q.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 680 | usbtv->vb2q.lock = &usbtv->vb2q_lock; |
| 681 | ret = vb2_queue_init(&usbtv->vb2q); |
| 682 | if (ret < 0) { |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 683 | dev_warn(usbtv->dev, "Could not initialize videobuf2 queue\n"); |
| 684 | return ret; |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 685 | } |
| 686 | |
| 687 | /* v4l2 structure */ |
| 688 | usbtv->v4l2_dev.release = usbtv_release; |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 689 | ret = v4l2_device_register(usbtv->dev, &usbtv->v4l2_dev); |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 690 | if (ret < 0) { |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 691 | dev_warn(usbtv->dev, "Could not register v4l2 device\n"); |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 692 | goto v4l2_fail; |
| 693 | } |
| 694 | |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 695 | /* Video structure */ |
| 696 | strlcpy(usbtv->vdev.name, "usbtv", sizeof(usbtv->vdev.name)); |
| 697 | usbtv->vdev.v4l2_dev = &usbtv->v4l2_dev; |
| 698 | usbtv->vdev.release = video_device_release_empty; |
| 699 | usbtv->vdev.fops = &usbtv_fops; |
| 700 | usbtv->vdev.ioctl_ops = &usbtv_ioctl_ops; |
Georg Kaindl | 0e0fe39 | 2013-10-21 12:01:36 -0300 | [diff] [blame] | 701 | usbtv->vdev.tvnorms = USBTV_TV_STD; |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 702 | usbtv->vdev.queue = &usbtv->vb2q; |
| 703 | usbtv->vdev.lock = &usbtv->v4l2_lock; |
| 704 | set_bit(V4L2_FL_USE_FH_PRIO, &usbtv->vdev.flags); |
| 705 | video_set_drvdata(&usbtv->vdev, usbtv); |
| 706 | ret = video_register_device(&usbtv->vdev, VFL_TYPE_GRABBER, -1); |
| 707 | if (ret < 0) { |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 708 | dev_warn(usbtv->dev, "Could not register video device\n"); |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 709 | goto vdev_fail; |
| 710 | } |
| 711 | |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 712 | return 0; |
| 713 | |
| 714 | vdev_fail: |
| 715 | v4l2_device_unregister(&usbtv->v4l2_dev); |
| 716 | v4l2_fail: |
| 717 | vb2_queue_release(&usbtv->vb2q); |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 718 | |
| 719 | return ret; |
| 720 | } |
| 721 | |
Federico Simoncelli | a3550ea | 2014-01-07 19:13:21 -0300 | [diff] [blame] | 722 | void usbtv_video_free(struct usbtv *usbtv) |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 723 | { |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 724 | mutex_lock(&usbtv->vb2q_lock); |
| 725 | mutex_lock(&usbtv->v4l2_lock); |
| 726 | |
| 727 | usbtv_stop(usbtv); |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 728 | video_unregister_device(&usbtv->vdev); |
| 729 | v4l2_device_disconnect(&usbtv->v4l2_dev); |
Lubomir Rintel | f3d27f3 | 2013-06-17 10:29:06 -0300 | [diff] [blame] | 730 | |
| 731 | mutex_unlock(&usbtv->v4l2_lock); |
| 732 | mutex_unlock(&usbtv->vb2q_lock); |
| 733 | |
| 734 | v4l2_device_put(&usbtv->v4l2_dev); |
| 735 | } |