Hans Verkuil | bd98516 | 2005-11-13 16:07:56 -0800 | [diff] [blame] | 1 | /* cx25840 VBI functions |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or |
| 4 | * modify it under the terms of the GNU General Public License |
| 5 | * as published by the Free Software Foundation; either version 2 |
| 6 | * of the License, or (at your option) any later version. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this program; if not, write to the Free Software |
| 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 16 | */ |
| 17 | |
| 18 | |
| 19 | #include <linux/videodev2.h> |
| 20 | #include <linux/i2c.h> |
| 21 | #include <media/v4l2-common.h> |
| 22 | |
| 23 | #include "cx25840.h" |
| 24 | |
Hans Verkuil | d92c20e | 2006-01-09 15:32:41 -0200 | [diff] [blame] | 25 | static int odd_parity(u8 c) |
Hans Verkuil | bd98516 | 2005-11-13 16:07:56 -0800 | [diff] [blame] | 26 | { |
| 27 | c ^= (c >> 4); |
| 28 | c ^= (c >> 2); |
| 29 | c ^= (c >> 1); |
| 30 | |
| 31 | return c & 1; |
| 32 | } |
| 33 | |
Hans Verkuil | d92c20e | 2006-01-09 15:32:41 -0200 | [diff] [blame] | 34 | static int decode_vps(u8 * dst, u8 * p) |
Hans Verkuil | bd98516 | 2005-11-13 16:07:56 -0800 | [diff] [blame] | 35 | { |
| 36 | static const u8 biphase_tbl[] = { |
| 37 | 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, |
| 38 | 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, |
| 39 | 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96, |
| 40 | 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2, |
| 41 | 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94, |
| 42 | 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0, |
| 43 | 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, |
| 44 | 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, |
| 45 | 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5, |
| 46 | 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1, |
| 47 | 0xc3, 0x4b, 0x43, 0xc3, 0x87, 0x0f, 0x07, 0x87, |
| 48 | 0x83, 0x0b, 0x03, 0x83, 0xc3, 0x4b, 0x43, 0xc3, |
| 49 | 0xc1, 0x49, 0x41, 0xc1, 0x85, 0x0d, 0x05, 0x85, |
| 50 | 0x81, 0x09, 0x01, 0x81, 0xc1, 0x49, 0x41, 0xc1, |
| 51 | 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5, |
| 52 | 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1, |
| 53 | 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4, |
| 54 | 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0, |
| 55 | 0xc2, 0x4a, 0x42, 0xc2, 0x86, 0x0e, 0x06, 0x86, |
| 56 | 0x82, 0x0a, 0x02, 0x82, 0xc2, 0x4a, 0x42, 0xc2, |
| 57 | 0xc0, 0x48, 0x40, 0xc0, 0x84, 0x0c, 0x04, 0x84, |
| 58 | 0x80, 0x08, 0x00, 0x80, 0xc0, 0x48, 0x40, 0xc0, |
| 59 | 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4, |
| 60 | 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0, |
| 61 | 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, |
| 62 | 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, |
| 63 | 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96, |
| 64 | 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2, |
| 65 | 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94, |
| 66 | 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0, |
| 67 | 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, |
| 68 | 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, |
| 69 | }; |
| 70 | |
| 71 | u8 c, err = 0; |
| 72 | int i; |
| 73 | |
| 74 | for (i = 0; i < 2 * 13; i += 2) { |
| 75 | err |= biphase_tbl[p[i]] | biphase_tbl[p[i + 1]]; |
| 76 | c = (biphase_tbl[p[i + 1]] & 0xf) | |
| 77 | ((biphase_tbl[p[i]] & 0xf) << 4); |
| 78 | dst[i / 2] = c; |
| 79 | } |
| 80 | |
| 81 | return err & 0xf0; |
| 82 | } |
| 83 | |
| 84 | void cx25840_vbi_setup(struct i2c_client *client) |
| 85 | { |
| 86 | v4l2_std_id std = cx25840_get_v4lstd(client); |
| 87 | |
| 88 | if (std & ~V4L2_STD_NTSC) { |
| 89 | /* datasheet startup, step 8d */ |
| 90 | cx25840_write(client, 0x49f, 0x11); |
| 91 | |
| 92 | cx25840_write(client, 0x470, 0x84); |
| 93 | cx25840_write(client, 0x471, 0x00); |
| 94 | cx25840_write(client, 0x472, 0x2d); |
| 95 | cx25840_write(client, 0x473, 0x5d); |
| 96 | |
| 97 | cx25840_write(client, 0x474, 0x24); |
| 98 | cx25840_write(client, 0x475, 0x40); |
| 99 | cx25840_write(client, 0x476, 0x24); |
| 100 | cx25840_write(client, 0x477, 0x28); |
| 101 | |
| 102 | cx25840_write(client, 0x478, 0x1f); |
| 103 | cx25840_write(client, 0x479, 0x02); |
| 104 | |
| 105 | if (std & V4L2_STD_SECAM) { |
| 106 | cx25840_write(client, 0x47a, 0x80); |
| 107 | cx25840_write(client, 0x47b, 0x00); |
| 108 | cx25840_write(client, 0x47c, 0x5f); |
| 109 | cx25840_write(client, 0x47d, 0x42); |
| 110 | } else { |
| 111 | cx25840_write(client, 0x47a, 0x90); |
| 112 | cx25840_write(client, 0x47b, 0x20); |
| 113 | cx25840_write(client, 0x47c, 0x63); |
| 114 | cx25840_write(client, 0x47d, 0x82); |
| 115 | } |
| 116 | |
| 117 | cx25840_write(client, 0x47e, 0x0a); |
| 118 | cx25840_write(client, 0x47f, 0x01); |
| 119 | } else { |
| 120 | /* datasheet startup, step 8d */ |
| 121 | cx25840_write(client, 0x49f, 0x14); |
| 122 | |
| 123 | cx25840_write(client, 0x470, 0x7a); |
| 124 | cx25840_write(client, 0x471, 0x00); |
| 125 | cx25840_write(client, 0x472, 0x2d); |
| 126 | cx25840_write(client, 0x473, 0x5b); |
| 127 | |
| 128 | cx25840_write(client, 0x474, 0x1a); |
| 129 | cx25840_write(client, 0x475, 0x70); |
| 130 | cx25840_write(client, 0x476, 0x1e); |
| 131 | cx25840_write(client, 0x477, 0x1e); |
| 132 | |
| 133 | cx25840_write(client, 0x478, 0x1f); |
| 134 | cx25840_write(client, 0x479, 0x02); |
| 135 | cx25840_write(client, 0x47a, 0x50); |
| 136 | cx25840_write(client, 0x47b, 0x66); |
| 137 | |
| 138 | cx25840_write(client, 0x47c, 0x1f); |
| 139 | cx25840_write(client, 0x47d, 0x7c); |
| 140 | cx25840_write(client, 0x47e, 0x08); |
| 141 | cx25840_write(client, 0x47f, 0x00); |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | int cx25840_vbi(struct i2c_client *client, unsigned int cmd, void *arg) |
| 146 | { |
| 147 | struct v4l2_format *fmt; |
| 148 | struct v4l2_sliced_vbi_format *svbi; |
| 149 | |
| 150 | switch (cmd) { |
| 151 | case VIDIOC_G_FMT: |
| 152 | { |
| 153 | static u16 lcr2vbi[] = { |
Mauro Carvalho Chehab | 6ac48b4 | 2006-01-23 17:11:05 -0200 | [diff] [blame] | 154 | 0, V4L2_SLICED_TELETEXT_PAL_B, 0, /* 1 */ |
Hans Verkuil | bd98516 | 2005-11-13 16:07:56 -0800 | [diff] [blame] | 155 | 0, V4L2_SLICED_WSS_625, 0, /* 4 */ |
| 156 | V4L2_SLICED_CAPTION_525, /* 6 */ |
| 157 | 0, 0, V4L2_SLICED_VPS, 0, 0, /* 9 */ |
| 158 | 0, 0, 0, 0 |
| 159 | }; |
| 160 | int i; |
| 161 | |
| 162 | fmt = arg; |
| 163 | if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) |
| 164 | return -EINVAL; |
| 165 | svbi = &fmt->fmt.sliced; |
| 166 | memset(svbi, 0, sizeof(*svbi)); |
| 167 | /* we're done if raw VBI is active */ |
| 168 | if ((cx25840_read(client, 0x404) & 0x10) == 0) |
| 169 | break; |
| 170 | |
| 171 | for (i = 7; i <= 23; i++) { |
| 172 | u8 v = cx25840_read(client, 0x424 + i - 7); |
| 173 | |
| 174 | svbi->service_lines[0][i] = lcr2vbi[v >> 4]; |
| 175 | svbi->service_lines[1][i] = lcr2vbi[v & 0xf]; |
| 176 | svbi->service_set |= |
| 177 | svbi->service_lines[0][i] | svbi->service_lines[1][i]; |
| 178 | } |
| 179 | break; |
| 180 | } |
| 181 | |
| 182 | case VIDIOC_S_FMT: |
| 183 | { |
| 184 | int is_pal = !(cx25840_get_v4lstd(client) & V4L2_STD_NTSC); |
| 185 | int vbi_offset = is_pal ? 1 : 0; |
| 186 | int i, x; |
| 187 | u8 lcr[24]; |
| 188 | |
| 189 | fmt = arg; |
| 190 | if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) |
| 191 | return -EINVAL; |
| 192 | svbi = &fmt->fmt.sliced; |
| 193 | if (svbi->service_set == 0) { |
| 194 | /* raw VBI */ |
| 195 | memset(svbi, 0, sizeof(*svbi)); |
| 196 | |
| 197 | /* Setup VBI */ |
| 198 | cx25840_vbi_setup(client); |
| 199 | |
| 200 | /* VBI Offset */ |
| 201 | cx25840_write(client, 0x47f, vbi_offset); |
| 202 | cx25840_write(client, 0x404, 0x2e); |
| 203 | break; |
| 204 | } |
| 205 | |
| 206 | for (x = 0; x <= 23; x++) |
| 207 | lcr[x] = 0x00; |
| 208 | |
| 209 | /* Setup VBI */ |
| 210 | cx25840_vbi_setup(client); |
| 211 | |
| 212 | /* Sliced VBI */ |
| 213 | cx25840_write(client, 0x404, 0x36); /* Ancillery data */ |
| 214 | cx25840_write(client, 0x406, 0x13); |
| 215 | cx25840_write(client, 0x47f, vbi_offset); |
| 216 | |
| 217 | if (is_pal) { |
| 218 | for (i = 0; i <= 6; i++) |
| 219 | svbi->service_lines[0][i] = |
| 220 | svbi->service_lines[1][i] = 0; |
| 221 | } else { |
| 222 | for (i = 0; i <= 9; i++) |
| 223 | svbi->service_lines[0][i] = |
| 224 | svbi->service_lines[1][i] = 0; |
| 225 | |
| 226 | for (i = 22; i <= 23; i++) |
| 227 | svbi->service_lines[0][i] = |
| 228 | svbi->service_lines[1][i] = 0; |
| 229 | } |
| 230 | |
| 231 | for (i = 7; i <= 23; i++) { |
| 232 | for (x = 0; x <= 1; x++) { |
| 233 | switch (svbi->service_lines[1-x][i]) { |
Mauro Carvalho Chehab | 6ac48b4 | 2006-01-23 17:11:05 -0200 | [diff] [blame] | 234 | case V4L2_SLICED_TELETEXT_PAL_B: |
Hans Verkuil | bd98516 | 2005-11-13 16:07:56 -0800 | [diff] [blame] | 235 | lcr[i] |= 1 << (4 * x); |
| 236 | break; |
| 237 | case V4L2_SLICED_WSS_625: |
| 238 | lcr[i] |= 4 << (4 * x); |
| 239 | break; |
| 240 | case V4L2_SLICED_CAPTION_525: |
| 241 | lcr[i] |= 6 << (4 * x); |
| 242 | break; |
| 243 | case V4L2_SLICED_VPS: |
| 244 | lcr[i] |= 9 << (4 * x); |
| 245 | break; |
| 246 | } |
| 247 | } |
| 248 | } |
| 249 | |
| 250 | for (x = 1, i = 0x424; i <= 0x434; i++, x++) { |
| 251 | cx25840_write(client, i, lcr[6 + x]); |
| 252 | } |
| 253 | |
| 254 | cx25840_write(client, 0x43c, 0x16); |
| 255 | |
| 256 | if (is_pal) { |
| 257 | cx25840_write(client, 0x474, 0x2a); |
| 258 | } else { |
| 259 | cx25840_write(client, 0x474, 0x1a + 6); |
| 260 | } |
| 261 | break; |
| 262 | } |
| 263 | |
| 264 | case VIDIOC_INT_DECODE_VBI_LINE: |
| 265 | { |
| 266 | struct v4l2_decode_vbi_line *vbi = arg; |
| 267 | u8 *p = vbi->p; |
| 268 | int id1, id2, l, err = 0; |
| 269 | |
| 270 | if (p[0] || p[1] != 0xff || p[2] != 0xff || |
| 271 | (p[3] != 0x55 && p[3] != 0x91)) { |
| 272 | vbi->line = vbi->type = 0; |
| 273 | break; |
| 274 | } |
| 275 | |
| 276 | p += 4; |
| 277 | id1 = p[-1]; |
| 278 | id2 = p[0] & 0xf; |
| 279 | l = p[2] & 0x3f; |
| 280 | l += 5; |
| 281 | p += 4; |
| 282 | |
| 283 | switch (id2) { |
| 284 | case 1: |
Mauro Carvalho Chehab | 6ac48b4 | 2006-01-23 17:11:05 -0200 | [diff] [blame] | 285 | id2 = V4L2_SLICED_TELETEXT_PAL_B; |
Hans Verkuil | bd98516 | 2005-11-13 16:07:56 -0800 | [diff] [blame] | 286 | break; |
| 287 | case 4: |
| 288 | id2 = V4L2_SLICED_WSS_625; |
| 289 | break; |
| 290 | case 6: |
| 291 | id2 = V4L2_SLICED_CAPTION_525; |
| 292 | err = !odd_parity(p[0]) || !odd_parity(p[1]); |
| 293 | break; |
| 294 | case 9: |
| 295 | id2 = V4L2_SLICED_VPS; |
| 296 | if (decode_vps(p, p) != 0) { |
| 297 | err = 1; |
| 298 | } |
| 299 | break; |
| 300 | default: |
| 301 | id2 = 0; |
| 302 | err = 1; |
| 303 | break; |
| 304 | } |
| 305 | |
| 306 | vbi->type = err ? 0 : id2; |
| 307 | vbi->line = err ? 0 : l; |
| 308 | vbi->is_second_field = err ? 0 : (id1 == 0x55); |
| 309 | vbi->p = p; |
| 310 | break; |
| 311 | } |
| 312 | } |
| 313 | |
| 314 | return 0; |
| 315 | } |