From adbc75d3cf3691d649c8dac1f32ee21f332f0f4c Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Fri, 30 Jan 2009 22:33:02 -0500 Subject: cx18: Clean-up and enable sliced VBI handling From: Andy Walls Removed legacy ivtv state variables, added comments, and cleaned up sliced VBI related code. Enabled sliced VBI. Priority: normal Signed-off-by: Andy Walls --- linux/drivers/media/video/cx18/cx18-av-vbi.c | 92 ++++++++++++++++++++++------ 1 file changed, 72 insertions(+), 20 deletions(-) (limited to 'linux/drivers/media/video/cx18/cx18-av-vbi.c') diff --git a/linux/drivers/media/video/cx18/cx18-av-vbi.c b/linux/drivers/media/video/cx18/cx18-av-vbi.c index 1527ea4f6..72325d774 100644 --- a/linux/drivers/media/video/cx18/cx18-av-vbi.c +++ b/linux/drivers/media/video/cx18/cx18-av-vbi.c @@ -24,6 +24,52 @@ #include "cx18-driver.h" +/* + * For sliced VBI output, we set up to use VIP-1.1, 10-bit mode, + * NN counts 4 bytes Dwords, an IDID of 0x00 0x80 or one with the VBI line #. + * Thus, according to the VIP-2 Spec, our VBI ancillary data lines + * (should!) look like: + * 4 byte EAV code: 0xff 0x00 0x00 0xRP + * unknown number of possible idle bytes + * 3 byte Anc data preamble: 0x00 0xff 0xff + * 1 byte data identifier: ne010iii (parity bits, 010, DID bits) + * 1 byte secondary data id: nessssss (parity bits, SDID bits) + * 1 byte data word count: necccccc (parity bits, NN Dword count) + * 2 byte Internal DID: 0x00 0x80 (programmed value) + * 4*NN data bytes + * 1 byte checksum + * Fill bytes needed to fil out to 4*NN bytes of payload + * + * The RP codes for EAVs when in VIP-1.1 mode, not in raw mode, & + * in the vertical blanking interval are: + * 0xb0 (Task 0 VerticalBlank HorizontalBlank 0 0 0 0) + * 0xf0 (Task EvenField VerticalBlank HorizontalBlank 0 0 0 0) + * + * Since the V bit is only allowed to toggle in the EAV RP code, just + * before the first active region line and for active lines, they are: + * 0x90 (Task 0 0 HorizontalBlank 0 0 0 0) + * 0xd0 (Task EvenField 0 HorizontalBlank 0 0 0 0) + * + * The user application DID bytes we care about are: + * 0x91 (1 0 010 0 !ActiveLine AncDataPresent) + * 0x55 (0 1 010 2ndField !ActiveLine AncDataPresent) + * + */ +static const u8 sliced_vbi_did[2] = { 0x91, 0x55 }; + +struct vbi_anc_data { + /* u8 eav[4]; */ + /* u8 idle[]; Variable number of idle bytes */ + u8 preamble[3]; + u8 did; + u8 sdid; + u8 data_count; + u8 idid[2]; + u8 payload[1]; /* 4*data_count of payload */ + /* u8 checksum; */ + /* u8 fill[]; Variable number of fill bytes */ +}; + static int odd_parity(u8 c) { c ^= (c >> 4); @@ -96,7 +142,7 @@ int cx18_av_vbi(struct cx18 *cx, unsigned int cmd, void *arg) 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 */ + V4L2_SLICED_VPS, 0, 0, 0, 0, /* 7 - unlike cx25840 */ 0, 0, 0, 0 }; int is_pal = !(state->std & V4L2_STD_525_60); @@ -220,47 +266,53 @@ int cx18_av_vbi(struct cx18 *cx, unsigned int cmd, void *arg) 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)) { + u8 *p; + struct vbi_anc_data *anc = (struct vbi_anc_data *) vbi->p; + int did, sdid, l, err = 0; + + /* + * Check for the ancillary data header for sliced VBI + */ + if (anc->preamble[0] || + anc->preamble[1] != 0xff || anc->preamble[2] != 0xff || + (anc->did != sliced_vbi_did[0] && + anc->did != sliced_vbi_did[1])) { vbi->line = vbi->type = 0; break; } - p += 4; - id1 = p[-1]; - id2 = p[0] & 0xf; - l = p[2] & 0x3f; + did = anc->did; + sdid = anc->sdid & 0xf; + l = anc->idid[0] & 0x3f; l += state->vbi_line_offset; - p += 4; + p = anc->payload; - switch (id2) { + /* Decode the SDID set by the slicer */ + switch (sdid) { case 1: - id2 = V4L2_SLICED_TELETEXT_B; + sdid = V4L2_SLICED_TELETEXT_B; break; case 4: - id2 = V4L2_SLICED_WSS_625; + sdid = V4L2_SLICED_WSS_625; break; case 6: - id2 = V4L2_SLICED_CAPTION_525; + sdid = V4L2_SLICED_CAPTION_525; err = !odd_parity(p[0]) || !odd_parity(p[1]); break; - case 9: - id2 = V4L2_SLICED_VPS; + case 7: /* Differs from cx25840 */ + sdid = V4L2_SLICED_VPS; if (decode_vps(p, p) != 0) err = 1; break; default: - id2 = 0; + sdid = 0; err = 1; break; } - vbi->type = err ? 0 : id2; + vbi->type = err ? 0 : sdid; vbi->line = err ? 0 : l; - vbi->is_second_field = err ? 0 : (id1 == 0x55); + vbi->is_second_field = err ? 0 : (did == sliced_vbi_did[1]); vbi->p = p; break; } -- cgit v1.2.3 From 1bef7beb0e6804e68c391f35f95c364e9c25bb53 Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Thu, 5 Feb 2009 20:37:49 -0500 Subject: cx18: Fix VBI ioctl() handling and Raw/Sliced VBI state management From: Andy Walls More sliced VBI fixes to bring the cx18 driver closer to full V4L2 spec compliance for VBI and to get sliced VBI working better. Priority: normal Signed-off-by: Andy Walls --- linux/drivers/media/video/cx18/cx18-av-vbi.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) (limited to 'linux/drivers/media/video/cx18/cx18-av-vbi.c') diff --git a/linux/drivers/media/video/cx18/cx18-av-vbi.c b/linux/drivers/media/video/cx18/cx18-av-vbi.c index 72325d774..b5763372a 100644 --- a/linux/drivers/media/video/cx18/cx18-av-vbi.c +++ b/linux/drivers/media/video/cx18/cx18-av-vbi.c @@ -25,8 +25,8 @@ #include "cx18-driver.h" /* - * For sliced VBI output, we set up to use VIP-1.1, 10-bit mode, - * NN counts 4 bytes Dwords, an IDID of 0x00 0x80 or one with the VBI line #. + * For sliced VBI output, we set up to use VIP-1.1, 8-bit mode, + * NN counts 1 byte Dwords, an IDID with the VBI line # in it. * Thus, according to the VIP-2 Spec, our VBI ancillary data lines * (should!) look like: * 4 byte EAV code: 0xff 0x00 0x00 0xRP @@ -35,8 +35,8 @@ * 1 byte data identifier: ne010iii (parity bits, 010, DID bits) * 1 byte secondary data id: nessssss (parity bits, SDID bits) * 1 byte data word count: necccccc (parity bits, NN Dword count) - * 2 byte Internal DID: 0x00 0x80 (programmed value) - * 4*NN data bytes + * 2 byte Internal DID: VBI-line-# 0x80 + * NN data bytes * 1 byte checksum * Fill bytes needed to fil out to 4*NN bytes of payload * @@ -65,7 +65,7 @@ struct vbi_anc_data { u8 sdid; u8 data_count; u8 idid[2]; - u8 payload[1]; /* 4*data_count of payload */ + u8 payload[1]; /* data_count of payload */ /* u8 checksum; */ /* u8 fill[]; Variable number of fill bytes */ }; @@ -215,6 +215,7 @@ int cx18_av_vbi(struct cx18 *cx, unsigned int cmd, void *arg) cx18_av_write(cx, 0x406, 0x13); cx18_av_write(cx, 0x47f, vbi_offset); + /* Force impossible lines to 0 */ if (is_pal) { for (i = 0; i <= 6; i++) svbi->service_lines[0][i] = @@ -229,6 +230,7 @@ int cx18_av_vbi(struct cx18 *cx, unsigned int cmd, void *arg) svbi->service_lines[1][i] = 0; } + /* Build register values for requested service lines */ for (i = 7; i <= 23; i++) { for (x = 0; x <= 1; x++) { switch (svbi->service_lines[1-x][i]) { @@ -242,7 +244,7 @@ int cx18_av_vbi(struct cx18 *cx, unsigned int cmd, void *arg) lcr[i] |= 6 << (4 * x); break; case V4L2_SLICED_VPS: - lcr[i] |= 9 << (4 * x); + lcr[i] |= 7 << (4 * x); /*'840 differs*/ break; } } -- cgit v1.2.3 From f9263f9b94e9a6f28065616efc07eb78d000a662 Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Sun, 8 Feb 2009 20:40:04 -0500 Subject: cx18: Finally get sliced VBI working - for 525 line 60 Hz systems at least From: Andy Walls Sliced VBI, in the manner that ivtv implements it as a separate data stream, now works for 525 line 60 Hz systems like NTSC-M. It may work for 625 line 50 Hz systems, but I have more engineering work to do, to verify it is operating properly. Sliced data insertion into the MPEG PS should be working, but is untested. Priority: normal Signed-off-by: Andy Walls --- linux/drivers/media/video/cx18/cx18-av-vbi.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'linux/drivers/media/video/cx18/cx18-av-vbi.c') diff --git a/linux/drivers/media/video/cx18/cx18-av-vbi.c b/linux/drivers/media/video/cx18/cx18-av-vbi.c index b5763372a..43267d1af 100644 --- a/linux/drivers/media/video/cx18/cx18-av-vbi.c +++ b/linux/drivers/media/video/cx18/cx18-av-vbi.c @@ -182,7 +182,6 @@ int cx18_av_vbi(struct cx18 *cx, unsigned int cmd, void *arg) 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]; @@ -199,7 +198,7 @@ int cx18_av_vbi(struct cx18 *cx, unsigned int cmd, void *arg) cx18_av_std_setup(cx); /* VBI Offset */ - cx18_av_write(cx, 0x47f, vbi_offset); + cx18_av_write(cx, 0x47f, state->slicer_line_delay); cx18_av_write(cx, 0x404, 0x2e); break; } @@ -213,7 +212,7 @@ int cx18_av_vbi(struct cx18 *cx, unsigned int cmd, void *arg) /* Sliced VBI */ cx18_av_write(cx, 0x404, 0x32); /* Ancillary data */ cx18_av_write(cx, 0x406, 0x13); - cx18_av_write(cx, 0x47f, vbi_offset); + cx18_av_write(cx, 0x47f, state->slicer_line_delay); /* Force impossible lines to 0 */ if (is_pal) { @@ -261,7 +260,8 @@ int cx18_av_vbi(struct cx18 *cx, unsigned int cmd, void *arg) } cx18_av_write(cx, 0x43c, 0x16); - cx18_av_write(cx, 0x474, is_pal ? 0x2a : 0x22); + /* FIXME - should match vblank set in cx18_av_std_setup() */ + cx18_av_write(cx, 0x474, is_pal ? 0x2a : 26); break; } @@ -286,7 +286,7 @@ int cx18_av_vbi(struct cx18 *cx, unsigned int cmd, void *arg) did = anc->did; sdid = anc->sdid & 0xf; l = anc->idid[0] & 0x3f; - l += state->vbi_line_offset; + l += state->slicer_line_offset; p = anc->payload; /* Decode the SDID set by the slicer */ -- cgit v1.2.3