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 #include <media/drv-intf/cx25840.h> 23 24 #include "cx25840-core.h" 25 26 static int odd_parity(u8 c) 27 { 28 c ^= (c >> 4); 29 c ^= (c >> 2); 30 c ^= (c >> 1); 31 32 return c & 1; 33 } 34 35 static int decode_vps(u8 * dst, u8 * p) 36 { 37 static const u8 biphase_tbl[] = { 38 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, 39 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, 40 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96, 41 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2, 42 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94, 43 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0, 44 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, 45 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, 46 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5, 47 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1, 48 0xc3, 0x4b, 0x43, 0xc3, 0x87, 0x0f, 0x07, 0x87, 49 0x83, 0x0b, 0x03, 0x83, 0xc3, 0x4b, 0x43, 0xc3, 50 0xc1, 0x49, 0x41, 0xc1, 0x85, 0x0d, 0x05, 0x85, 51 0x81, 0x09, 0x01, 0x81, 0xc1, 0x49, 0x41, 0xc1, 52 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5, 53 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1, 54 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4, 55 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0, 56 0xc2, 0x4a, 0x42, 0xc2, 0x86, 0x0e, 0x06, 0x86, 57 0x82, 0x0a, 0x02, 0x82, 0xc2, 0x4a, 0x42, 0xc2, 58 0xc0, 0x48, 0x40, 0xc0, 0x84, 0x0c, 0x04, 0x84, 59 0x80, 0x08, 0x00, 0x80, 0xc0, 0x48, 0x40, 0xc0, 60 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4, 61 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0, 62 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, 63 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, 64 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96, 65 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2, 66 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94, 67 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0, 68 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, 69 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, 70 }; 71 72 u8 c, err = 0; 73 int i; 74 75 for (i = 0; i < 2 * 13; i += 2) { 76 err |= biphase_tbl[p[i]] | biphase_tbl[p[i + 1]]; 77 c = (biphase_tbl[p[i + 1]] & 0xf) | 78 ((biphase_tbl[p[i]] & 0xf) << 4); 79 dst[i / 2] = c; 80 } 81 82 return err & 0xf0; 83 } 84 85 int cx25840_g_sliced_fmt(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *svbi) 86 { 87 struct i2c_client *client = v4l2_get_subdevdata(sd); 88 struct cx25840_state *state = to_state(sd); 89 static const u16 lcr2vbi[] = { 90 0, V4L2_SLICED_TELETEXT_B, 0, /* 1 */ 91 0, V4L2_SLICED_WSS_625, 0, /* 4 */ 92 V4L2_SLICED_CAPTION_525, /* 6 */ 93 0, 0, V4L2_SLICED_VPS, 0, 0, /* 9 */ 94 0, 0, 0, 0 95 }; 96 int is_pal = !(state->std & V4L2_STD_525_60); 97 int i; 98 99 memset(svbi->service_lines, 0, sizeof(svbi->service_lines)); 100 svbi->service_set = 0; 101 /* we're done if raw VBI is active */ 102 if ((cx25840_read(client, 0x404) & 0x10) == 0) 103 return 0; 104 105 if (is_pal) { 106 for (i = 7; i <= 23; i++) { 107 u8 v = cx25840_read(client, 108 state->vbi_regs_offset + 0x424 + i - 7); 109 110 svbi->service_lines[0][i] = lcr2vbi[v >> 4]; 111 svbi->service_lines[1][i] = lcr2vbi[v & 0xf]; 112 svbi->service_set |= svbi->service_lines[0][i] | 113 svbi->service_lines[1][i]; 114 } 115 } else { 116 for (i = 10; i <= 21; i++) { 117 u8 v = cx25840_read(client, 118 state->vbi_regs_offset + 0x424 + i - 10); 119 120 svbi->service_lines[0][i] = lcr2vbi[v >> 4]; 121 svbi->service_lines[1][i] = lcr2vbi[v & 0xf]; 122 svbi->service_set |= svbi->service_lines[0][i] | 123 svbi->service_lines[1][i]; 124 } 125 } 126 return 0; 127 } 128 129 int cx25840_s_raw_fmt(struct v4l2_subdev *sd, struct v4l2_vbi_format *fmt) 130 { 131 struct i2c_client *client = v4l2_get_subdevdata(sd); 132 struct cx25840_state *state = to_state(sd); 133 int is_pal = !(state->std & V4L2_STD_525_60); 134 int vbi_offset = is_pal ? 1 : 0; 135 136 /* Setup standard */ 137 cx25840_std_setup(client); 138 139 /* VBI Offset */ 140 if (is_cx23888(state)) 141 cx25840_write(client, 0x54f, vbi_offset); 142 else 143 cx25840_write(client, 0x47f, vbi_offset); 144 cx25840_write(client, 0x404, 0x2e); 145 return 0; 146 } 147 148 int cx25840_s_sliced_fmt(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *svbi) 149 { 150 struct i2c_client *client = v4l2_get_subdevdata(sd); 151 struct cx25840_state *state = to_state(sd); 152 int is_pal = !(state->std & V4L2_STD_525_60); 153 int vbi_offset = is_pal ? 1 : 0; 154 int i, x; 155 u8 lcr[24]; 156 157 for (x = 0; x <= 23; x++) 158 lcr[x] = 0x00; 159 160 /* Setup standard */ 161 cx25840_std_setup(client); 162 163 /* Sliced VBI */ 164 cx25840_write(client, 0x404, 0x32); /* Ancillary data */ 165 cx25840_write(client, 0x406, 0x13); 166 if (is_cx23888(state)) 167 cx25840_write(client, 0x54f, vbi_offset); 168 else 169 cx25840_write(client, 0x47f, vbi_offset); 170 171 if (is_pal) { 172 for (i = 0; i <= 6; i++) 173 svbi->service_lines[0][i] = 174 svbi->service_lines[1][i] = 0; 175 } else { 176 for (i = 0; i <= 9; i++) 177 svbi->service_lines[0][i] = 178 svbi->service_lines[1][i] = 0; 179 180 for (i = 22; i <= 23; i++) 181 svbi->service_lines[0][i] = 182 svbi->service_lines[1][i] = 0; 183 } 184 185 for (i = 7; i <= 23; i++) { 186 for (x = 0; x <= 1; x++) { 187 switch (svbi->service_lines[1-x][i]) { 188 case V4L2_SLICED_TELETEXT_B: 189 lcr[i] |= 1 << (4 * x); 190 break; 191 case V4L2_SLICED_WSS_625: 192 lcr[i] |= 4 << (4 * x); 193 break; 194 case V4L2_SLICED_CAPTION_525: 195 lcr[i] |= 6 << (4 * x); 196 break; 197 case V4L2_SLICED_VPS: 198 lcr[i] |= 9 << (4 * x); 199 break; 200 } 201 } 202 } 203 204 if (is_pal) { 205 for (x = 1, i = state->vbi_regs_offset + 0x424; 206 i <= state->vbi_regs_offset + 0x434; i++, x++) 207 cx25840_write(client, i, lcr[6 + x]); 208 } else { 209 for (x = 1, i = state->vbi_regs_offset + 0x424; 210 i <= state->vbi_regs_offset + 0x430; i++, x++) 211 cx25840_write(client, i, lcr[9 + x]); 212 for (i = state->vbi_regs_offset + 0x431; 213 i <= state->vbi_regs_offset + 0x434; i++) 214 cx25840_write(client, i, 0); 215 } 216 217 cx25840_write(client, state->vbi_regs_offset + 0x43c, 0x16); 218 if (is_cx23888(state)) 219 cx25840_write(client, 0x428, is_pal ? 0x2a : 0x22); 220 else 221 cx25840_write(client, 0x474, is_pal ? 0x2a : 0x22); 222 return 0; 223 } 224 225 int cx25840_decode_vbi_line(struct v4l2_subdev *sd, struct v4l2_decode_vbi_line *vbi) 226 { 227 struct cx25840_state *state = to_state(sd); 228 u8 *p = vbi->p; 229 int id1, id2, l, err = 0; 230 231 if (p[0] || p[1] != 0xff || p[2] != 0xff || 232 (p[3] != 0x55 && p[3] != 0x91)) { 233 vbi->line = vbi->type = 0; 234 return 0; 235 } 236 237 p += 4; 238 id1 = p[-1]; 239 id2 = p[0] & 0xf; 240 l = p[2] & 0x3f; 241 l += state->vbi_line_offset; 242 p += 4; 243 244 switch (id2) { 245 case 1: 246 id2 = V4L2_SLICED_TELETEXT_B; 247 break; 248 case 4: 249 id2 = V4L2_SLICED_WSS_625; 250 break; 251 case 6: 252 id2 = V4L2_SLICED_CAPTION_525; 253 err = !odd_parity(p[0]) || !odd_parity(p[1]); 254 break; 255 case 9: 256 id2 = V4L2_SLICED_VPS; 257 if (decode_vps(p, p) != 0) 258 err = 1; 259 break; 260 default: 261 id2 = 0; 262 err = 1; 263 break; 264 } 265 266 vbi->type = err ? 0 : id2; 267 vbi->line = err ? 0 : l; 268 vbi->is_second_field = err ? 0 : (id1 == 0x55); 269 vbi->p = p; 270 return 0; 271 } 272