V4L/DVB (10439): cx18: Clean-up and enable sliced VBI handling

Removed legacy ivtv state variables, added comments, and cleaned
up sliced VBI related code.  Enabled sliced VBI.

Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cx18/cx18-av-core.c

@@ -169,9 +169,14 @@ static void cx18_av_initialize(struct cx18 *cx)
 	/* Set VGA_TRACK_RANGE to 0x20 */
 	cx18_av_and_or4(cx, CXADEC_DFE_CTRL2, 0xFFFF00FF, 0x00002000);
 
-	/* Enable VBI capture */
-	cx18_av_write4(cx, CXADEC_OUT_CTRL1, 0x4010253F);
-	/* cx18_av_write4(cx, CXADEC_OUT_CTRL1, 0x4010253E); */
+	/*
+	 * Initial VBI setup
+	 * VIP-1.1, 10 bit mode, enable Raw, disable sliced,
+	 * don't clamp raw samples when codes are in use, 4 byte user D-words,
+	 * programmed IDID, RP code V bit transition on VBLANK, data during
+	 * blanking intervals
+	 */
+	cx18_av_write4(cx, CXADEC_OUT_CTRL1, 0x4010252e);
 
 	/* Set the video input.
 	   The setting in MODE_CTRL gets lost when we do the above setup */

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;
 	}

drivers/media/video/cx18/cx18-cards.c

@@ -51,7 +51,7 @@ static struct cx18_card_tuner_i2c cx18_i2c_std = {
 static const struct cx18_card cx18_card_hvr1600_esmt = {
 	.type = CX18_CARD_HVR_1600_ESMT,
 	.name = "Hauppauge HVR-1600",
-	.comment = "Raw VBI supported; Sliced VBI is not yet supported\n",
+	.comment = "Simultaneous Digital and Analog TV capture supported\n",
 	.v4l2_capabilities = CX18_CAP_ENCODER,
 	.hw_audio_ctrl = CX18_HW_CX23418,
 	.hw_muxer = CX18_HW_CS5345,
@@ -97,7 +97,7 @@ static const struct cx18_card cx18_card_hvr1600_esmt = {
 static const struct cx18_card cx18_card_hvr1600_samsung = {
 	.type = CX18_CARD_HVR_1600_SAMSUNG,
 	.name = "Hauppauge HVR-1600 (Preproduction)",
-	.comment = "Raw VBI supported; Sliced VBI is not yet supported\n",
+	.comment = "Simultaneous Digital and Analog TV capture supported\n",
 	.v4l2_capabilities = CX18_CAP_ENCODER,
 	.hw_audio_ctrl = CX18_HW_CX23418,
 	.hw_muxer = CX18_HW_CS5345,
@@ -152,7 +152,7 @@ static const struct cx18_card_pci_info cx18_pci_h900[] = {
 static const struct cx18_card cx18_card_h900 = {
 	.type = CX18_CARD_COMPRO_H900,
 	.name = "Compro VideoMate H900",
-	.comment = "Raw VBI supported; Sliced VBI is not yet supported\n",
+	.comment = "Analog TV capture supported\n",
 	.v4l2_capabilities = CX18_CAP_ENCODER,
 	.hw_audio_ctrl = CX18_HW_CX23418,
 	.hw_all = CX18_HW_TUNER,
@@ -249,7 +249,7 @@ static const struct cx18_card_pci_info cx18_pci_cnxt_raptor_pal[] = {
 static const struct cx18_card cx18_card_cnxt_raptor_pal = {
 	.type = CX18_CARD_CNXT_RAPTOR_PAL,
 	.name = "Conexant Raptor PAL/SECAM",
-	.comment = "Raw VBI supported; Sliced VBI is not yet supported\n",
+	.comment = "Analog TV capture supported\n",
 	.v4l2_capabilities = CX18_CAP_ENCODER,
 	.hw_audio_ctrl = CX18_HW_CX23418,
 	.hw_muxer = CX18_HW_GPIO,

drivers/media/video/cx18/cx18-cards.h

@@ -49,8 +49,7 @@
 /* V4L2 capability aliases */
 #define CX18_CAP_ENCODER (V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TUNER | \
 			  V4L2_CAP_AUDIO | V4L2_CAP_READWRITE | \
-			  V4L2_CAP_VBI_CAPTURE)
-/* | V4L2_CAP_SLICED_VBI_CAPTURE) not yet */
+			  V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE)
 
 struct cx18_card_video_input {
 	u8  video_type; 	/* video input type */

drivers/media/video/cx18/cx18-controls.c

@@ -178,8 +178,8 @@ static int cx18_setup_vbi_fmt(struct cx18 *cx, enum v4l2_mpeg_stream_vbi_fmt fmt
 		int i;
 
 		for (i = 0; i < CX18_VBI_FRAMES; i++) {
-			/* Yuck, hardcoded. Needs to be a define */
-			cx->vbi.sliced_mpeg_data[i] = kmalloc(2049, GFP_KERNEL);
+			cx->vbi.sliced_mpeg_data[i] =
+			       kmalloc(CX18_SLICED_MPEG_DATA_BUFSZ, GFP_KERNEL);
 			if (cx->vbi.sliced_mpeg_data[i] == NULL) {
 				while (--i >= 0) {
 					kfree(cx->vbi.sliced_mpeg_data[i]);

drivers/media/video/cx18/cx18-driver.c

@@ -586,7 +586,8 @@ static int __devinit cx18_init_struct1(struct cx18 *cx)
 		(cx->params.video_temporal_filter_mode << 1) |
 		(cx->params.video_median_filter_type << 2);
 	cx->params.port = CX2341X_PORT_MEMORY;
-	cx->params.capabilities = CX2341X_CAP_HAS_TS | CX2341X_CAP_HAS_AC3;
+	cx->params.capabilities =
+	  CX2341X_CAP_HAS_TS | CX2341X_CAP_HAS_AC3 | CX2341X_CAP_HAS_SLICED_VBI;
 	init_waitqueue_head(&cx->cap_w);
 	init_waitqueue_head(&cx->mb_apu_waitq);
 	init_waitqueue_head(&cx->mb_cpu_waitq);
@@ -596,49 +597,6 @@ static int __devinit cx18_init_struct1(struct cx18 *cx)
 	cx->vbi.in.type = V4L2_BUF_TYPE_VBI_CAPTURE;
 	cx->vbi.sliced_in = &cx->vbi.in.fmt.sliced;
 
-	/*
-	 * The VBI line sizes depend on the pixel clock and the horiz rate
-	 *
-	 * (1/Fh)*(2*Fp) = Samples/line
-	 *     = 4 bytes EAV + Anc data in hblank + 4 bytes SAV + active samples
-	 *
-	 *  Sliced VBI is sent as ancillary data during horizontal blanking
-	 *  Raw VBI is sent as active video samples during vertcal blanking
-	 *
-	 *  We use a  BT.656 pxiel clock of 13.5 MHz and a BT.656 active line
-	 *  length of 720 pixels @ 4:2:2 sampling.  Thus...
-	 *
-	 *  For systems that use a 15.734 kHz horizontal rate, such as
-	 *  NTSC-M, PAL-M, PAL-60, and other 60 Hz/525 line systems, we have:
-	 *
-	 *  (1/15.734 kHz) * 2 * 13.5 MHz = 1716 samples/line =
-	 *  4 bytes SAV + 268 bytes anc data + 4 bytes SAV + 1440 active samples
-	 *
-	 *  For systems that use a 15.625 kHz horizontal rate, such as
-	 *  PAL-B/G/H, PAL-I, SECAM-L and other 50 Hz/625 line systems, we have:
-	 *
-	 *  (1/15.625 kHz) * 2 * 13.5 MHz = 1728 samples/line =
-	 *  4 bytes SAV + 280 bytes anc data + 4 bytes SAV + 1440 active samples
-	 *
-	 */
-
-	/* FIXME: init these based on tuner std & modify when std changes */
-	/* CX18-AV-Core number of VBI samples output per horizontal line */
-	cx->vbi.raw_decoder_line_size = 1444;   /* 4 byte SAV + 2 * 720 */
-	cx->vbi.sliced_decoder_line_size = 272; /* 60 Hz: 268+4, 50 Hz: 280+4 */
-
-	/* CX18-AV-Core VBI samples/line possibly rounded up */
-	cx->vbi.raw_size = 1444;   /* Real max size is 1444 */
-	cx->vbi.sliced_size = 284; /* Real max size is  284 */
-
-	/*
-	 * CX18-AV-Core SAV/EAV RP codes in VIP 1.x mode
-	 * Task Field VerticalBlank HorizontalBlank 0 0 0 0
-	 */
-	cx->vbi.raw_decoder_sav_odd_field = 0x20;     /*   V  */
-	cx->vbi.raw_decoder_sav_even_field = 0x60;    /*  FV  */
-	cx->vbi.sliced_decoder_sav_odd_field = 0xB0;  /* T VH - actually EAV */
-	cx->vbi.sliced_decoder_sav_even_field = 0xF0; /* TFVH - actually EAV */
 	return 0;
 }
 
@@ -671,7 +629,6 @@ static void __devinit cx18_init_struct2(struct cx18 *cx)
 	cx->av_state.aud_input = CX18_AV_AUDIO8;
 	cx->av_state.audclk_freq = 48000;
 	cx->av_state.audmode = V4L2_TUNER_MODE_LANG1;
-	/* FIXME - 8 is NTSC value, investigate */
 	cx->av_state.vbi_line_offset = 8;
 }
 
@@ -936,7 +893,7 @@ static int __devinit cx18_probe(struct pci_dev *pci_dev,
 	 * suboptimal, as the CVBS and SVideo inputs could use a different std
 	 * and the buffer could end up being too small in that case.
 	 */
-	vbi_buf_size = cx->vbi.raw_size * (cx->is_60hz ? 24 : 36) / 2;
+	vbi_buf_size = vbi_active_samples * (cx->is_60hz ? 24 : 36) / 2;
 	cx->stream_buf_size[CX18_ENC_STREAM_TYPE_VBI] = vbi_buf_size;
 
 	if (cx->stream_buffers[CX18_ENC_STREAM_TYPE_VBI] < 0)