aboutsummaryrefslogtreecommitdiff
path: root/drivers/media/video/cx18/cx18-av-vbi.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/video/cx18/cx18-av-vbi.c')
-rw-r--r--drivers/media/video/cx18/cx18-av-vbi.c413
1 files changed, 413 insertions, 0 deletions
diff --git a/drivers/media/video/cx18/cx18-av-vbi.c b/drivers/media/video/cx18/cx18-av-vbi.c
new file mode 100644
index 00000000000..d09f1daf4eb
--- /dev/null
+++ b/drivers/media/video/cx18/cx18-av-vbi.c
@@ -0,0 +1,413 @@
+/*
+ * cx18 ADEC VBI functions
+ *
+ * Derived from cx25840-vbi.c
+ *
+ * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+
+#include "cx18-driver.h"
+
+static int odd_parity(u8 c)
+{
+ c ^= (c >> 4);
+ c ^= (c >> 2);
+ c ^= (c >> 1);
+
+ return c & 1;
+}
+
+static int decode_vps(u8 *dst, u8 *p)
+{
+ static const u8 biphase_tbl[] = {
+ 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
+ 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
+ 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96,
+ 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2,
+ 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94,
+ 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0,
+ 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
+ 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
+ 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5,
+ 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1,
+ 0xc3, 0x4b, 0x43, 0xc3, 0x87, 0x0f, 0x07, 0x87,
+ 0x83, 0x0b, 0x03, 0x83, 0xc3, 0x4b, 0x43, 0xc3,
+ 0xc1, 0x49, 0x41, 0xc1, 0x85, 0x0d, 0x05, 0x85,
+ 0x81, 0x09, 0x01, 0x81, 0xc1, 0x49, 0x41, 0xc1,
+ 0xe1, 0x69, 0x61, 0xe1, 0xa5, 0x2d, 0x25, 0xa5,
+ 0xa1, 0x29, 0x21, 0xa1, 0xe1, 0x69, 0x61, 0xe1,
+ 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4,
+ 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0,
+ 0xc2, 0x4a, 0x42, 0xc2, 0x86, 0x0e, 0x06, 0x86,
+ 0x82, 0x0a, 0x02, 0x82, 0xc2, 0x4a, 0x42, 0xc2,
+ 0xc0, 0x48, 0x40, 0xc0, 0x84, 0x0c, 0x04, 0x84,
+ 0x80, 0x08, 0x00, 0x80, 0xc0, 0x48, 0x40, 0xc0,
+ 0xe0, 0x68, 0x60, 0xe0, 0xa4, 0x2c, 0x24, 0xa4,
+ 0xa0, 0x28, 0x20, 0xa0, 0xe0, 0x68, 0x60, 0xe0,
+ 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
+ 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
+ 0xd2, 0x5a, 0x52, 0xd2, 0x96, 0x1e, 0x16, 0x96,
+ 0x92, 0x1a, 0x12, 0x92, 0xd2, 0x5a, 0x52, 0xd2,
+ 0xd0, 0x58, 0x50, 0xd0, 0x94, 0x1c, 0x14, 0x94,
+ 0x90, 0x18, 0x10, 0x90, 0xd0, 0x58, 0x50, 0xd0,
+ 0xf0, 0x78, 0x70, 0xf0, 0xb4, 0x3c, 0x34, 0xb4,
+ 0xb0, 0x38, 0x30, 0xb0, 0xf0, 0x78, 0x70, 0xf0,
+ };
+
+ u8 c, err = 0;
+ int i;
+
+ for (i = 0; i < 2 * 13; i += 2) {
+ err |= biphase_tbl[p[i]] | biphase_tbl[p[i + 1]];
+ c = (biphase_tbl[p[i + 1]] & 0xf) |
+ ((biphase_tbl[p[i]] & 0xf) << 4);
+ dst[i / 2] = c;
+ }
+
+ return err & 0xf0;
+}
+
+void cx18_av_vbi_setup(struct cx18 *cx)
+{
+ struct cx18_av_state *state = &cx->av_state;
+ v4l2_std_id std = state->std;
+ int hblank, hactive, burst, vblank, vactive, sc;
+ int vblank656, src_decimation;
+ int luma_lpf, uv_lpf, comb;
+ u32 pll_int, pll_frac, pll_post;
+
+ /* datasheet startup, step 8d */
+ if (std & ~V4L2_STD_NTSC)
+ cx18_av_write(cx, 0x49f, 0x11);
+ else
+ cx18_av_write(cx, 0x49f, 0x14);
+
+ if (std & V4L2_STD_625_50) {
+ hblank = 0x084;
+ hactive = 0x2d0;
+ burst = 0x5d;
+ vblank = 0x024;
+ vactive = 0x244;
+ vblank656 = 0x28;
+ src_decimation = 0x21f;
+
+ luma_lpf = 2;
+ if (std & V4L2_STD_SECAM) {
+ uv_lpf = 0;
+ comb = 0;
+ sc = 0x0a425f;
+ } else if (std == V4L2_STD_PAL_Nc) {
+ uv_lpf = 1;
+ comb = 0x20;
+ sc = 556453;
+ } else {
+ uv_lpf = 1;
+ comb = 0x20;
+ sc = 0x0a8263;
+ }
+ } else {
+ hactive = 720;
+ hblank = 122;
+ vactive = 487;
+ luma_lpf = 1;
+ uv_lpf = 1;
+
+ src_decimation = 0x21f;
+ if (std == V4L2_STD_PAL_60) {
+ vblank = 26;
+ vblank656 = 26;
+ burst = 0x5b;
+ luma_lpf = 2;
+ comb = 0x20;
+ sc = 0x0a8263;
+ } else if (std == V4L2_STD_PAL_M) {
+ vblank = 20;
+ vblank656 = 24;
+ burst = 0x61;
+ comb = 0x20;
+
+ sc = 555452;
+ } else {
+ vblank = 26;
+ vblank656 = 26;
+ burst = 0x5b;
+ comb = 0x66;
+ sc = 556063;
+ }
+ }
+
+ /* DEBUG: Displays configured PLL frequency */
+ pll_int = cx18_av_read(cx, 0x108);
+ pll_frac = cx18_av_read4(cx, 0x10c) & 0x1ffffff;
+ pll_post = cx18_av_read(cx, 0x109);
+ CX18_DEBUG_INFO("PLL regs = int: %u, frac: %u, post: %u\n",
+ pll_int, pll_frac, pll_post);
+
+ if (pll_post) {
+ int fin, fsc;
+ int pll = 28636363L * ((((u64)pll_int) << 25) + pll_frac);
+
+ pll >>= 25;
+ pll /= pll_post;
+ CX18_DEBUG_INFO("PLL = %d.%06d MHz\n",
+ pll / 1000000, pll % 1000000);
+ CX18_DEBUG_INFO("PLL/8 = %d.%06d MHz\n",
+ pll / 8000000, (pll / 8) % 1000000);
+
+ fin = ((u64)src_decimation * pll) >> 12;
+ CX18_DEBUG_INFO("ADC Sampling freq = %d.%06d MHz\n",
+ fin / 1000000, fin % 1000000);
+
+ fsc = (((u64)sc) * pll) >> 24L;
+ CX18_DEBUG_INFO("Chroma sub-carrier freq = %d.%06d MHz\n",
+ fsc / 1000000, fsc % 1000000);
+
+ CX18_DEBUG_INFO("hblank %i, hactive %i, "
+ "vblank %i , vactive %i, vblank656 %i, src_dec %i,"
+ "burst 0x%02x, luma_lpf %i, uv_lpf %i, comb 0x%02x,"
+ " sc 0x%06x\n",
+ hblank, hactive, vblank, vactive, vblank656,
+ src_decimation, burst, luma_lpf, uv_lpf, comb, sc);
+ }
+
+ /* Sets horizontal blanking delay and active lines */
+ cx18_av_write(cx, 0x470, hblank);
+ cx18_av_write(cx, 0x471, 0xff & (((hblank >> 8) & 0x3) |
+ (hactive << 4)));
+ cx18_av_write(cx, 0x472, hactive >> 4);
+
+ /* Sets burst gate delay */
+ cx18_av_write(cx, 0x473, burst);
+
+ /* Sets vertical blanking delay and active duration */
+ cx18_av_write(cx, 0x474, vblank);
+ cx18_av_write(cx, 0x475, 0xff & (((vblank >> 8) & 0x3) |
+ (vactive << 4)));
+ cx18_av_write(cx, 0x476, vactive >> 4);
+ cx18_av_write(cx, 0x477, vblank656);
+
+ /* Sets src decimation rate */
+ cx18_av_write(cx, 0x478, 0xff & src_decimation);
+ cx18_av_write(cx, 0x479, 0xff & (src_decimation >> 8));
+
+ /* Sets Luma and UV Low pass filters */
+ cx18_av_write(cx, 0x47a, luma_lpf << 6 | ((uv_lpf << 4) & 0x30));
+
+ /* Enables comb filters */
+ cx18_av_write(cx, 0x47b, comb);
+
+ /* Sets SC Step*/
+ cx18_av_write(cx, 0x47c, sc);
+ cx18_av_write(cx, 0x47d, 0xff & sc >> 8);
+ cx18_av_write(cx, 0x47e, 0xff & sc >> 16);
+
+ /* Sets VBI parameters */
+ if (std & V4L2_STD_625_50) {
+ cx18_av_write(cx, 0x47f, 0x01);
+ state->vbi_line_offset = 5;
+ } else {
+ cx18_av_write(cx, 0x47f, 0x00);
+ state->vbi_line_offset = 8;
+ }
+}
+
+int cx18_av_vbi(struct cx18 *cx, unsigned int cmd, void *arg)
+{
+ struct cx18_av_state *state = &cx->av_state;
+ struct v4l2_format *fmt;
+ struct v4l2_sliced_vbi_format *svbi;
+
+ switch (cmd) {
+ case VIDIOC_G_FMT:
+ {
+ static u16 lcr2vbi[] = {
+ 0, V4L2_SLICED_TELETEXT_B, 0, /* 1 */
+ 0, V4L2_SLICED_WSS_625, 0, /* 4 */
+ V4L2_SLICED_CAPTION_525, /* 6 */
+ 0, 0, V4L2_SLICED_VPS, 0, 0, /* 9 */
+ 0, 0, 0, 0
+ };
+ int is_pal = !(state->std & V4L2_STD_525_60);
+ int i;
+
+ fmt = arg;
+ if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
+ return -EINVAL;
+ svbi = &fmt->fmt.sliced;
+ memset(svbi, 0, sizeof(*svbi));
+ /* we're done if raw VBI is active */
+ if ((cx18_av_read(cx, 0x404) & 0x10) == 0)
+ break;
+
+ if (is_pal) {
+ for (i = 7; i <= 23; i++) {
+ u8 v = cx18_av_read(cx, 0x424 + i - 7);
+
+ svbi->service_lines[0][i] = lcr2vbi[v >> 4];
+ svbi->service_lines[1][i] = lcr2vbi[v & 0xf];
+ svbi->service_set |= svbi->service_lines[0][i] |
+ svbi->service_lines[1][i];
+ }
+ } else {
+ for (i = 10; i <= 21; i++) {
+ u8 v = cx18_av_read(cx, 0x424 + i - 10);
+
+ svbi->service_lines[0][i] = lcr2vbi[v >> 4];
+ svbi->service_lines[1][i] = lcr2vbi[v & 0xf];
+ svbi->service_set |= svbi->service_lines[0][i] |
+ svbi->service_lines[1][i];
+ }
+ }
+ break;
+ }
+
+ case VIDIOC_S_FMT:
+ {
+ int is_pal = !(state->std & V4L2_STD_525_60);
+ int vbi_offset = is_pal ? 1 : 0;
+ int i, x;
+ u8 lcr[24];
+
+ fmt = arg;
+ if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE)
+ return -EINVAL;
+ svbi = &fmt->fmt.sliced;
+ if (svbi->service_set == 0) {
+ /* raw VBI */
+ memset(svbi, 0, sizeof(*svbi));
+
+ /* Setup VBI */
+ cx18_av_vbi_setup(cx);
+
+ /* VBI Offset */
+ cx18_av_write(cx, 0x47f, vbi_offset);
+ cx18_av_write(cx, 0x404, 0x2e);
+ break;
+ }
+
+ for (x = 0; x <= 23; x++)
+ lcr[x] = 0x00;
+
+ /* Setup VBI */
+ cx18_av_vbi_setup(cx);
+
+ /* Sliced VBI */
+ cx18_av_write(cx, 0x404, 0x32); /* Ancillary data */
+ cx18_av_write(cx, 0x406, 0x13);
+ cx18_av_write(cx, 0x47f, vbi_offset);
+
+ if (is_pal) {
+ for (i = 0; i <= 6; i++)
+ svbi->service_lines[0][i] =
+ svbi->service_lines[1][i] = 0;
+ } else {
+ for (i = 0; i <= 9; i++)
+ svbi->service_lines[0][i] =
+ svbi->service_lines[1][i] = 0;
+
+ for (i = 22; i <= 23; i++)
+ svbi->service_lines[0][i] =
+ svbi->service_lines[1][i] = 0;
+ }
+
+ for (i = 7; i <= 23; i++) {
+ for (x = 0; x <= 1; x++) {
+ switch (svbi->service_lines[1-x][i]) {
+ case V4L2_SLICED_TELETEXT_B:
+ lcr[i] |= 1 << (4 * x);
+ break;
+ case V4L2_SLICED_WSS_625:
+ lcr[i] |= 4 << (4 * x);
+ break;
+ case V4L2_SLICED_CAPTION_525:
+ lcr[i] |= 6 << (4 * x);
+ break;
+ case V4L2_SLICED_VPS:
+ lcr[i] |= 9 << (4 * x);
+ break;
+ }
+ }
+ }
+
+ if (is_pal) {
+ for (x = 1, i = 0x424; i <= 0x434; i++, x++)
+ cx18_av_write(cx, i, lcr[6 + x]);
+ } else {
+ for (x = 1, i = 0x424; i <= 0x430; i++, x++)
+ cx18_av_write(cx, i, lcr[9 + x]);
+ for (i = 0x431; i <= 0x434; i++)
+ cx18_av_write(cx, i, 0);
+ }
+
+ cx18_av_write(cx, 0x43c, 0x16);
+ cx18_av_write(cx, 0x474, is_pal ? 0x2a : 0x22);
+ break;
+ }
+
+ case VIDIOC_INT_DECODE_VBI_LINE:
+ {
+ struct v4l2_decode_vbi_line *vbi = arg;
+ u8 *p = vbi->p;
+ int id1, id2, l, err = 0;
+
+ if (p[0] || p[1] != 0xff || p[2] != 0xff ||
+ (p[3] != 0x55 && p[3] != 0x91)) {
+ vbi->line = vbi->type = 0;
+ break;
+ }
+
+ p += 4;
+ id1 = p[-1];
+ id2 = p[0] & 0xf;
+ l = p[2] & 0x3f;
+ l += state->vbi_line_offset;
+ p += 4;
+
+ switch (id2) {
+ case 1:
+ id2 = V4L2_SLICED_TELETEXT_B;
+ break;
+ case 4:
+ id2 = V4L2_SLICED_WSS_625;
+ break;
+ case 6:
+ id2 = V4L2_SLICED_CAPTION_525;
+ err = !odd_parity(p[0]) || !odd_parity(p[1]);
+ break;
+ case 9:
+ id2 = V4L2_SLICED_VPS;
+ if (decode_vps(p, p) != 0)
+ err = 1;
+ break;
+ default:
+ id2 = 0;
+ err = 1;
+ break;
+ }
+
+ vbi->type = err ? 0 : id2;
+ vbi->line = err ? 0 : l;
+ vbi->is_second_field = err ? 0 : (id1 == 0x55);
+ vbi->p = p;
+ break;
+ }
+ }
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-16 11:13:35 +0000