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1// SPDX-License-Identifier: GPL-2.0-or-later2/* cx25840 VBI functions3 */4 5 6#include <linux/videodev2.h>7#include <linux/i2c.h>8#include <media/v4l2-common.h>9#include <media/drv-intf/cx25840.h>10 11#include "cx25840-core.h"12 13static int odd_parity(u8 c)14{15 c ^= (c >> 4);16 c ^= (c >> 2);17 c ^= (c >> 1);18 19 return c & 1;20}21 22static int decode_vps(u8 * dst, u8 * p)23{24 static const u8 biphase_tbl[] = {25 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,26 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,27 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96,28 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2,29 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94,30 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0,31 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,32 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,33 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5,34 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1,35 0xc3, 0x4b, 0x43, 0xc3, 0x87, 0x0f, 0x07, 0x87,36 0x83, 0x0b, 0x03, 0x83, 0xc3, 0x4b, 0x43, 0xc3,37 0xc1, 0x49, 0x41, 0xc1, 0x85, 0x0d, 0x05, 0x85,38 0x81, 0x09, 0x01, 0x81, 0xc1, 0x49, 0x41, 0xc1,39 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5,40 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1,41 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4,42 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0,43 0xc2, 0x4a, 0x42, 0xc2, 0x86, 0x0e, 0x06, 0x86,44 0x82, 0x0a, 0x02, 0x82, 0xc2, 0x4a, 0x42, 0xc2,45 0xc0, 0x48, 0x40, 0xc0, 0x84, 0x0c, 0x04, 0x84,46 0x80, 0x08, 0x00, 0x80, 0xc0, 0x48, 0x40, 0xc0,47 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4,48 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0,49 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,50 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,51 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96,52 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2,53 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94,54 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0,55 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,56 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,57 };58 59 u8 c, err = 0;60 int i;61 62 for (i = 0; i < 2 * 13; i += 2) {63 err |= biphase_tbl[p[i]] | biphase_tbl[p[i + 1]];64 c = (biphase_tbl[p[i + 1]] & 0xf) |65 ((biphase_tbl[p[i]] & 0xf) << 4);66 dst[i / 2] = c;67 }68 69 return err & 0xf0;70}71 72int cx25840_g_sliced_fmt(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *svbi)73{74 struct i2c_client *client = v4l2_get_subdevdata(sd);75 struct cx25840_state *state = to_state(sd);76 static const u16 lcr2vbi[] = {77 0, V4L2_SLICED_TELETEXT_B, 0, /* 1 */78 0, V4L2_SLICED_WSS_625, 0, /* 4 */79 V4L2_SLICED_CAPTION_525, /* 6 */80 0, 0, V4L2_SLICED_VPS, 0, 0, /* 9 */81 0, 0, 0, 082 };83 int is_pal = !(state->std & V4L2_STD_525_60);84 int i;85 86 memset(svbi->service_lines, 0, sizeof(svbi->service_lines));87 svbi->service_set = 0;88 /* we're done if raw VBI is active */89 /* TODO: this will have to be changed for generic_mode VBI */90 if ((cx25840_read(client, 0x404) & 0x10) == 0)91 return 0;92 93 if (is_pal) {94 for (i = 7; i <= 23; i++) {95 u8 v = cx25840_read(client,96 state->vbi_regs_offset + 0x424 + i - 7);97 98 svbi->service_lines[0][i] = lcr2vbi[v >> 4];99 svbi->service_lines[1][i] = lcr2vbi[v & 0xf];100 svbi->service_set |= svbi->service_lines[0][i] |101 svbi->service_lines[1][i];102 }103 } else {104 for (i = 10; i <= 21; i++) {105 u8 v = cx25840_read(client,106 state->vbi_regs_offset + 0x424 + i - 10);107 108 svbi->service_lines[0][i] = lcr2vbi[v >> 4];109 svbi->service_lines[1][i] = lcr2vbi[v & 0xf];110 svbi->service_set |= svbi->service_lines[0][i] |111 svbi->service_lines[1][i];112 }113 }114 return 0;115}116 117int cx25840_s_raw_fmt(struct v4l2_subdev *sd, struct v4l2_vbi_format *fmt)118{119 struct i2c_client *client = v4l2_get_subdevdata(sd);120 struct cx25840_state *state = to_state(sd);121 int is_pal = !(state->std & V4L2_STD_525_60);122 int vbi_offset = is_pal ? 1 : 0;123 124 /* Setup standard */125 cx25840_std_setup(client);126 127 /* VBI Offset */128 if (is_cx23888(state))129 cx25840_write(client, 0x54f, vbi_offset);130 else131 cx25840_write(client, 0x47f, vbi_offset);132 /* TODO: this will have to be changed for generic_mode VBI */133 cx25840_write(client, 0x404, 0x2e);134 return 0;135}136 137int cx25840_s_sliced_fmt(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *svbi)138{139 struct i2c_client *client = v4l2_get_subdevdata(sd);140 struct cx25840_state *state = to_state(sd);141 int is_pal = !(state->std & V4L2_STD_525_60);142 int vbi_offset = is_pal ? 1 : 0;143 int i, x;144 u8 lcr[24];145 146 for (x = 0; x <= 23; x++)147 lcr[x] = 0x00;148 149 /* Setup standard */150 cx25840_std_setup(client);151 152 /* Sliced VBI */153 /* TODO: this will have to be changed for generic_mode VBI */154 cx25840_write(client, 0x404, 0x32); /* Ancillary data */155 cx25840_write(client, 0x406, 0x13);156 if (is_cx23888(state))157 cx25840_write(client, 0x54f, vbi_offset);158 else159 cx25840_write(client, 0x47f, vbi_offset);160 161 if (is_pal) {162 for (i = 0; i <= 6; i++)163 svbi->service_lines[0][i] =164 svbi->service_lines[1][i] = 0;165 } else {166 for (i = 0; i <= 9; i++)167 svbi->service_lines[0][i] =168 svbi->service_lines[1][i] = 0;169 170 for (i = 22; i <= 23; i++)171 svbi->service_lines[0][i] =172 svbi->service_lines[1][i] = 0;173 }174 175 for (i = 7; i <= 23; i++) {176 for (x = 0; x <= 1; x++) {177 switch (svbi->service_lines[1-x][i]) {178 case V4L2_SLICED_TELETEXT_B:179 lcr[i] |= 1 << (4 * x);180 break;181 case V4L2_SLICED_WSS_625:182 lcr[i] |= 4 << (4 * x);183 break;184 case V4L2_SLICED_CAPTION_525:185 lcr[i] |= 6 << (4 * x);186 break;187 case V4L2_SLICED_VPS:188 lcr[i] |= 9 << (4 * x);189 break;190 }191 }192 }193 194 if (is_pal) {195 for (x = 1, i = state->vbi_regs_offset + 0x424;196 i <= state->vbi_regs_offset + 0x434; i++, x++)197 cx25840_write(client, i, lcr[6 + x]);198 } else {199 for (x = 1, i = state->vbi_regs_offset + 0x424;200 i <= state->vbi_regs_offset + 0x430; i++, x++)201 cx25840_write(client, i, lcr[9 + x]);202 for (i = state->vbi_regs_offset + 0x431;203 i <= state->vbi_regs_offset + 0x434; i++)204 cx25840_write(client, i, 0);205 }206 207 cx25840_write(client, state->vbi_regs_offset + 0x43c, 0x16);208 /* TODO: this will have to be changed for generic_mode VBI */209 if (is_cx23888(state))210 cx25840_write(client, 0x428, is_pal ? 0x2a : 0x22);211 else212 cx25840_write(client, 0x474, is_pal ? 0x2a : 0x22);213 return 0;214}215 216int cx25840_decode_vbi_line(struct v4l2_subdev *sd, struct v4l2_decode_vbi_line *vbi)217{218 struct cx25840_state *state = to_state(sd);219 u8 *p = vbi->p;220 int id1, id2, l, err = 0;221 222 if (p[0] || p[1] != 0xff || p[2] != 0xff ||223 (p[3] != 0x55 && p[3] != 0x91)) {224 vbi->line = vbi->type = 0;225 return 0;226 }227 228 p += 4;229 id1 = p[-1];230 id2 = p[0] & 0xf;231 l = p[2] & 0x3f;232 l += state->vbi_line_offset;233 p += 4;234 235 switch (id2) {236 case 1:237 id2 = V4L2_SLICED_TELETEXT_B;238 break;239 case 4:240 id2 = V4L2_SLICED_WSS_625;241 break;242 case 6:243 id2 = V4L2_SLICED_CAPTION_525;244 err = !odd_parity(p[0]) || !odd_parity(p[1]);245 break;246 case 9:247 id2 = V4L2_SLICED_VPS;248 if (decode_vps(p, p) != 0)249 err = 1;250 break;251 default:252 id2 = 0;253 err = 1;254 break;255 }256 257 vbi->type = err ? 0 : id2;258 vbi->line = err ? 0 : l;259 vbi->is_second_field = err ? 0 : (id1 == 0x55);260 vbi->p = p;261 return 0;262}263