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262 lines
6.9 KiB
262 lines
6.9 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* cx25840 VBI functions |
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*/ |
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#include <linux/videodev2.h> |
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#include <linux/i2c.h> |
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#include <media/v4l2-common.h> |
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#include <media/drv-intf/cx25840.h> |
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#include "cx25840-core.h" |
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static int odd_parity(u8 c) |
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{ |
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c ^= (c >> 4); |
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c ^= (c >> 2); |
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c ^= (c >> 1); |
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return c & 1; |
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} |
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static int decode_vps(u8 * dst, u8 * p) |
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{ |
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static const u8 biphase_tbl[] = { |
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0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, |
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0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, |
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0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96, |
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0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2, |
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0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94, |
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0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0, |
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0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, |
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0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, |
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0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5, |
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0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1, |
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0xc3, 0x4b, 0x43, 0xc3, 0x87, 0x0f, 0x07, 0x87, |
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0x83, 0x0b, 0x03, 0x83, 0xc3, 0x4b, 0x43, 0xc3, |
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0xc1, 0x49, 0x41, 0xc1, 0x85, 0x0d, 0x05, 0x85, |
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0x81, 0x09, 0x01, 0x81, 0xc1, 0x49, 0x41, 0xc1, |
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0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5, |
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0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1, |
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0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4, |
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0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0, |
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0xc2, 0x4a, 0x42, 0xc2, 0x86, 0x0e, 0x06, 0x86, |
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0x82, 0x0a, 0x02, 0x82, 0xc2, 0x4a, 0x42, 0xc2, |
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0xc0, 0x48, 0x40, 0xc0, 0x84, 0x0c, 0x04, 0x84, |
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0x80, 0x08, 0x00, 0x80, 0xc0, 0x48, 0x40, 0xc0, |
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0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4, |
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0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0, |
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0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, |
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0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, |
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0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96, |
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0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2, |
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0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94, |
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0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0, |
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0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4, |
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0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0, |
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}; |
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u8 c, err = 0; |
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int i; |
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for (i = 0; i < 2 * 13; i += 2) { |
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err |= biphase_tbl[p[i]] | biphase_tbl[p[i + 1]]; |
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c = (biphase_tbl[p[i + 1]] & 0xf) | |
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((biphase_tbl[p[i]] & 0xf) << 4); |
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dst[i / 2] = c; |
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} |
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return err & 0xf0; |
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} |
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int cx25840_g_sliced_fmt(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *svbi) |
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{ |
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struct i2c_client *client = v4l2_get_subdevdata(sd); |
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struct cx25840_state *state = to_state(sd); |
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static const u16 lcr2vbi[] = { |
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0, V4L2_SLICED_TELETEXT_B, 0, /* 1 */ |
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0, V4L2_SLICED_WSS_625, 0, /* 4 */ |
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V4L2_SLICED_CAPTION_525, /* 6 */ |
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0, 0, V4L2_SLICED_VPS, 0, 0, /* 9 */ |
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0, 0, 0, 0 |
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}; |
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int is_pal = !(state->std & V4L2_STD_525_60); |
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int i; |
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memset(svbi->service_lines, 0, sizeof(svbi->service_lines)); |
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svbi->service_set = 0; |
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/* we're done if raw VBI is active */ |
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/* TODO: this will have to be changed for generic_mode VBI */ |
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if ((cx25840_read(client, 0x404) & 0x10) == 0) |
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return 0; |
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if (is_pal) { |
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for (i = 7; i <= 23; i++) { |
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u8 v = cx25840_read(client, |
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state->vbi_regs_offset + 0x424 + i - 7); |
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svbi->service_lines[0][i] = lcr2vbi[v >> 4]; |
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svbi->service_lines[1][i] = lcr2vbi[v & 0xf]; |
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svbi->service_set |= svbi->service_lines[0][i] | |
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svbi->service_lines[1][i]; |
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} |
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} else { |
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for (i = 10; i <= 21; i++) { |
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u8 v = cx25840_read(client, |
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state->vbi_regs_offset + 0x424 + i - 10); |
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svbi->service_lines[0][i] = lcr2vbi[v >> 4]; |
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svbi->service_lines[1][i] = lcr2vbi[v & 0xf]; |
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svbi->service_set |= svbi->service_lines[0][i] | |
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svbi->service_lines[1][i]; |
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} |
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} |
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return 0; |
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} |
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int cx25840_s_raw_fmt(struct v4l2_subdev *sd, struct v4l2_vbi_format *fmt) |
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{ |
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struct i2c_client *client = v4l2_get_subdevdata(sd); |
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struct cx25840_state *state = to_state(sd); |
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int is_pal = !(state->std & V4L2_STD_525_60); |
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int vbi_offset = is_pal ? 1 : 0; |
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/* Setup standard */ |
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cx25840_std_setup(client); |
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/* VBI Offset */ |
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if (is_cx23888(state)) |
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cx25840_write(client, 0x54f, vbi_offset); |
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else |
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cx25840_write(client, 0x47f, vbi_offset); |
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/* TODO: this will have to be changed for generic_mode VBI */ |
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cx25840_write(client, 0x404, 0x2e); |
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return 0; |
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} |
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int cx25840_s_sliced_fmt(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *svbi) |
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{ |
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struct i2c_client *client = v4l2_get_subdevdata(sd); |
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struct cx25840_state *state = to_state(sd); |
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int is_pal = !(state->std & V4L2_STD_525_60); |
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int vbi_offset = is_pal ? 1 : 0; |
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int i, x; |
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u8 lcr[24]; |
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for (x = 0; x <= 23; x++) |
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lcr[x] = 0x00; |
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/* Setup standard */ |
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cx25840_std_setup(client); |
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/* Sliced VBI */ |
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/* TODO: this will have to be changed for generic_mode VBI */ |
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cx25840_write(client, 0x404, 0x32); /* Ancillary data */ |
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cx25840_write(client, 0x406, 0x13); |
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if (is_cx23888(state)) |
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cx25840_write(client, 0x54f, vbi_offset); |
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else |
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cx25840_write(client, 0x47f, vbi_offset); |
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if (is_pal) { |
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for (i = 0; i <= 6; i++) |
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svbi->service_lines[0][i] = |
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svbi->service_lines[1][i] = 0; |
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} else { |
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for (i = 0; i <= 9; i++) |
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svbi->service_lines[0][i] = |
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svbi->service_lines[1][i] = 0; |
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for (i = 22; i <= 23; i++) |
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svbi->service_lines[0][i] = |
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svbi->service_lines[1][i] = 0; |
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} |
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for (i = 7; i <= 23; i++) { |
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for (x = 0; x <= 1; x++) { |
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switch (svbi->service_lines[1-x][i]) { |
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case V4L2_SLICED_TELETEXT_B: |
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lcr[i] |= 1 << (4 * x); |
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break; |
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case V4L2_SLICED_WSS_625: |
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lcr[i] |= 4 << (4 * x); |
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break; |
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case V4L2_SLICED_CAPTION_525: |
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lcr[i] |= 6 << (4 * x); |
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break; |
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case V4L2_SLICED_VPS: |
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lcr[i] |= 9 << (4 * x); |
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break; |
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} |
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} |
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} |
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if (is_pal) { |
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for (x = 1, i = state->vbi_regs_offset + 0x424; |
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i <= state->vbi_regs_offset + 0x434; i++, x++) |
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cx25840_write(client, i, lcr[6 + x]); |
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} else { |
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for (x = 1, i = state->vbi_regs_offset + 0x424; |
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i <= state->vbi_regs_offset + 0x430; i++, x++) |
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cx25840_write(client, i, lcr[9 + x]); |
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for (i = state->vbi_regs_offset + 0x431; |
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i <= state->vbi_regs_offset + 0x434; i++) |
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cx25840_write(client, i, 0); |
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} |
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cx25840_write(client, state->vbi_regs_offset + 0x43c, 0x16); |
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/* TODO: this will have to be changed for generic_mode VBI */ |
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if (is_cx23888(state)) |
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cx25840_write(client, 0x428, is_pal ? 0x2a : 0x22); |
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else |
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cx25840_write(client, 0x474, is_pal ? 0x2a : 0x22); |
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return 0; |
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} |
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int cx25840_decode_vbi_line(struct v4l2_subdev *sd, struct v4l2_decode_vbi_line *vbi) |
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{ |
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struct cx25840_state *state = to_state(sd); |
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u8 *p = vbi->p; |
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int id1, id2, l, err = 0; |
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if (p[0] || p[1] != 0xff || p[2] != 0xff || |
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(p[3] != 0x55 && p[3] != 0x91)) { |
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vbi->line = vbi->type = 0; |
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return 0; |
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} |
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p += 4; |
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id1 = p[-1]; |
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id2 = p[0] & 0xf; |
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l = p[2] & 0x3f; |
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l += state->vbi_line_offset; |
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p += 4; |
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switch (id2) { |
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case 1: |
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id2 = V4L2_SLICED_TELETEXT_B; |
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break; |
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case 4: |
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id2 = V4L2_SLICED_WSS_625; |
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break; |
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case 6: |
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id2 = V4L2_SLICED_CAPTION_525; |
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err = !odd_parity(p[0]) || !odd_parity(p[1]); |
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break; |
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case 9: |
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id2 = V4L2_SLICED_VPS; |
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if (decode_vps(p, p) != 0) |
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err = 1; |
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break; |
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default: |
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id2 = 0; |
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err = 1; |
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break; |
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} |
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vbi->type = err ? 0 : id2; |
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vbi->line = err ? 0 : l; |
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vbi->is_second_field = err ? 0 : (id1 == 0x55); |
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vbi->p = p; |
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return 0; |
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}
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