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 14 15 #include <linux/videodev2.h> 16 #include <linux/i2c.h> 17 #include <media/v4l2-common.h> 18 #include <media/drv-intf/cx25840.h> 19 20 #include "cx25840-core.h" 21 22 static int odd_parity(u8 c) 23 { 24 c ^= (c >> 4); 25 c ^= (c >> 2); 26 c ^= (c >> 1); 27 28 return c & 1; 29 } 30 31 static int decode_vps(u8 * dst, u8 * p) 32 { 33 static const u8 biphase_tbl[] = { 34 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, 35 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, 36 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96, 37 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2, 38 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94, 39 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0, 40 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, 41 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, 42 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5, 43 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1, 44 0xc3, 0x4b, 0x43, 0xc3, 0x87, 0x0f, 0x07, 0x87, 45 0x83, 0x0b, 0x03, 0x83, 0xc3, 0x4b, 0x43, 0xc3, 46 0xc1, 0x49, 0x41, 0xc1, 0x85, 0x0d, 0x05, 0x85, 47 0x81, 0x09, 0x01, 0x81, 0xc1, 0x49, 0x41, 0xc1, 48 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5, 49 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1, 50 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4, 51 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0, 52 0xc2, 0x4a, 0x42, 0xc2, 0x86, 0x0e, 0x06, 0x86, 53 0x82, 0x0a, 0x02, 0x82, 0xc2, 0x4a, 0x42, 0xc2, 54 0xc0, 0x48, 0x40, 0xc0, 0x84, 0x0c, 0x04, 0x84, 55 0x80, 0x08, 0x00, 0x80, 0xc0, 0x48, 0x40, 0xc0, 56 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4, 57 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0, 58 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, 59 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, 60 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96, 61 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2, 62 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94, 63 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0, 64 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, 65 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, 66 }; 67 68 u8 c, err = 0; 69 int i; 70 71 for (i = 0; i < 2 * 13; i += 2) { 72 err |= biphase_tbl[p[i]] | biphase_tbl[p[i + 1]]; 73 c = (biphase_tbl[p[i + 1]] & 0xf) | 74 ((biphase_tbl[p[i]] & 0xf) << 4); 75 dst[i / 2] = c; 76 } 77 78 return err & 0xf0; 79 } 80 81 int cx25840_g_sliced_fmt(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *svbi) 82 { 83 struct i2c_client *client = v4l2_get_subdevdata(sd); 84 struct cx25840_state *state = to_state(sd); 85 static const u16 lcr2vbi[] = { 86 0, V4L2_SLICED_TELETEXT_B, 0, /* 1 */ 87 0, V4L2_SLICED_WSS_625, 0, /* 4 */ 88 V4L2_SLICED_CAPTION_525, /* 6 */ 89 0, 0, V4L2_SLICED_VPS, 0, 0, /* 9 */ 90 0, 0, 0, 0 91 }; 92 int is_pal = !(state->std & V4L2_STD_525_60); 93 int i; 94 95 memset(svbi->service_lines, 0, sizeof(svbi->service_lines)); 96 svbi->service_set = 0; 97 /* we're done if raw VBI is active */ 98 if ((cx25840_read(client, 0x404) & 0x10) == 0) 99 return 0; 100 101 if (is_pal) { 102 for (i = 7; i <= 23; i++) { 103 u8 v = cx25840_read(client, 104 state->vbi_regs_offset + 0x424 + i - 7); 105 106 svbi->service_lines[0][i] = lcr2vbi[v >> 4]; 107 svbi->service_lines[1][i] = lcr2vbi[v & 0xf]; 108 svbi->service_set |= svbi->service_lines[0][i] | 109 svbi->service_lines[1][i]; 110 } 111 } else { 112 for (i = 10; i <= 21; i++) { 113 u8 v = cx25840_read(client, 114 state->vbi_regs_offset + 0x424 + i - 10); 115 116 svbi->service_lines[0][i] = lcr2vbi[v >> 4]; 117 svbi->service_lines[1][i] = lcr2vbi[v & 0xf]; 118 svbi->service_set |= svbi->service_lines[0][i] | 119 svbi->service_lines[1][i]; 120 } 121 } 122 return 0; 123 } 124 125 int cx25840_s_raw_fmt(struct v4l2_subdev *sd, struct v4l2_vbi_format *fmt) 126 { 127 struct i2c_client *client = v4l2_get_subdevdata(sd); 128 struct cx25840_state *state = to_state(sd); 129 int is_pal = !(state->std & V4L2_STD_525_60); 130 int vbi_offset = is_pal ? 1 : 0; 131 132 /* Setup standard */ 133 cx25840_std_setup(client); 134 135 /* VBI Offset */ 136 if (is_cx23888(state)) 137 cx25840_write(client, 0x54f, vbi_offset); 138 else 139 cx25840_write(client, 0x47f, vbi_offset); 140 cx25840_write(client, 0x404, 0x2e); 141 return 0; 142 } 143 144 int cx25840_s_sliced_fmt(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *svbi) 145 { 146 struct i2c_client *client = v4l2_get_subdevdata(sd); 147 struct cx25840_state *state = to_state(sd); 148 int is_pal = !(state->std & V4L2_STD_525_60); 149 int vbi_offset = is_pal ? 1 : 0; 150 int i, x; 151 u8 lcr[24]; 152 153 for (x = 0; x <= 23; x++) 154 lcr[x] = 0x00; 155 156 /* Setup standard */ 157 cx25840_std_setup(client); 158 159 /* Sliced VBI */ 160 cx25840_write(client, 0x404, 0x32); /* Ancillary data */ 161 cx25840_write(client, 0x406, 0x13); 162 if (is_cx23888(state)) 163 cx25840_write(client, 0x54f, vbi_offset); 164 else 165 cx25840_write(client, 0x47f, vbi_offset); 166 167 if (is_pal) { 168 for (i = 0; i <= 6; i++) 169 svbi->service_lines[0][i] = 170 svbi->service_lines[1][i] = 0; 171 } else { 172 for (i = 0; i <= 9; i++) 173 svbi->service_lines[0][i] = 174 svbi->service_lines[1][i] = 0; 175 176 for (i = 22; i <= 23; i++) 177 svbi->service_lines[0][i] = 178 svbi->service_lines[1][i] = 0; 179 } 180 181 for (i = 7; i <= 23; i++) { 182 for (x = 0; x <= 1; x++) { 183 switch (svbi->service_lines[1-x][i]) { 184 case V4L2_SLICED_TELETEXT_B: 185 lcr[i] |= 1 << (4 * x); 186 break; 187 case V4L2_SLICED_WSS_625: 188 lcr[i] |= 4 << (4 * x); 189 break; 190 case V4L2_SLICED_CAPTION_525: 191 lcr[i] |= 6 << (4 * x); 192 break; 193 case V4L2_SLICED_VPS: 194 lcr[i] |= 9 << (4 * x); 195 break; 196 } 197 } 198 } 199 200 if (is_pal) { 201 for (x = 1, i = state->vbi_regs_offset + 0x424; 202 i <= state->vbi_regs_offset + 0x434; i++, x++) 203 cx25840_write(client, i, lcr[6 + x]); 204 } else { 205 for (x = 1, i = state->vbi_regs_offset + 0x424; 206 i <= state->vbi_regs_offset + 0x430; i++, x++) 207 cx25840_write(client, i, lcr[9 + x]); 208 for (i = state->vbi_regs_offset + 0x431; 209 i <= state->vbi_regs_offset + 0x434; i++) 210 cx25840_write(client, i, 0); 211 } 212 213 cx25840_write(client, state->vbi_regs_offset + 0x43c, 0x16); 214 if (is_cx23888(state)) 215 cx25840_write(client, 0x428, is_pal ? 0x2a : 0x22); 216 else 217 cx25840_write(client, 0x474, is_pal ? 0x2a : 0x22); 218 return 0; 219 } 220 221 int cx25840_decode_vbi_line(struct v4l2_subdev *sd, struct v4l2_decode_vbi_line *vbi) 222 { 223 struct cx25840_state *state = to_state(sd); 224 u8 *p = vbi->p; 225 int id1, id2, l, err = 0; 226 227 if (p[0] || p[1] != 0xff || p[2] != 0xff || 228 (p[3] != 0x55 && p[3] != 0x91)) { 229 vbi->line = vbi->type = 0; 230 return 0; 231 } 232 233 p += 4; 234 id1 = p[-1]; 235 id2 = p[0] & 0xf; 236 l = p[2] & 0x3f; 237 l += state->vbi_line_offset; 238 p += 4; 239 240 switch (id2) { 241 case 1: 242 id2 = V4L2_SLICED_TELETEXT_B; 243 break; 244 case 4: 245 id2 = V4L2_SLICED_WSS_625; 246 break; 247 case 6: 248 id2 = V4L2_SLICED_CAPTION_525; 249 err = !odd_parity(p[0]) || !odd_parity(p[1]); 250 break; 251 case 9: 252 id2 = V4L2_SLICED_VPS; 253 if (decode_vps(p, p) != 0) 254 err = 1; 255 break; 256 default: 257 id2 = 0; 258 err = 1; 259 break; 260 } 261 262 vbi->type = err ? 0 : id2; 263 vbi->line = err ? 0 : l; 264 vbi->is_second_field = err ? 0 : (id1 == 0x55); 265 vbi->p = p; 266 return 0; 267 } 268