From c41e20d9cba3b133cd88e35cd86c02781b32f62a Mon Sep 17 00:00:00 2001
From: Hugo Grostabussiat <bonstra@bonstra.fr.eu.org>
Date: Sun, 8 Apr 2018 17:11:57 -0400
Subject: [PATCH] media: usbtv: Add SECAM support

Add support for the SECAM norm, using the "AVSECAM" decoder configuration
sequence found in Windows driver's .INF file.

For reference, the "AVSECAM" sequence in the .INF file is:
0x04,0x73,0xDC,0x72,0xA2,0x90,0x35,0x01,0x30,0x04,0x08,0x2D,0x28,0x08,
0x02,0x69,0x16,0x35,0x21,0x16,0x36

Signed-off-by: Hugo Grostabussiat <bonstra@bonstra.fr.eu.org>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
---
 drivers/media/usb/usbtv/usbtv-video.c | 38 ++++++++++++++++++++++++++-
 drivers/media/usb/usbtv/usbtv.h       |  2 +-
 2 files changed, 38 insertions(+), 2 deletions(-)

diff --git a/drivers/media/usb/usbtv/usbtv-video.c b/drivers/media/usb/usbtv/usbtv-video.c
index 97f9790954f9..6b0a10173388 100644
--- a/drivers/media/usb/usbtv/usbtv-video.c
+++ b/drivers/media/usb/usbtv/usbtv-video.c
@@ -57,6 +57,11 @@ static struct usbtv_norm_params norm_params[] = {
 		.norm = V4L2_STD_PAL,
 		.cap_width = 720,
 		.cap_height = 576,
+	},
+	{
+		.norm = V4L2_STD_SECAM,
+		.cap_width = 720,
+		.cap_height = 576,
 	}
 };
 
@@ -187,6 +192,34 @@ static int usbtv_select_norm(struct usbtv *usbtv, v4l2_std_id norm)
 		{ USBTV_BASE + 0x024f, 0x0002 },
 	};
 
+	static const u16 secam[][2] = {
+		/* "AVSECAM" tuning sequence from .INF file */
+		{ USBTV_BASE + 0x0003, 0x0004 },
+		{ USBTV_BASE + 0x001a, 0x0073 },
+		{ USBTV_BASE + 0x0100, 0x00dc },
+		{ USBTV_BASE + 0x010e, 0x0072 },
+		{ USBTV_BASE + 0x010f, 0x00a2 },
+		{ USBTV_BASE + 0x0112, 0x0090 },
+		{ USBTV_BASE + 0x0115, 0x0035 },
+		{ USBTV_BASE + 0x0117, 0x0001 },
+		{ USBTV_BASE + 0x0118, 0x0030 },
+		{ USBTV_BASE + 0x012d, 0x0004 },
+		{ USBTV_BASE + 0x012f, 0x0008 },
+		{ USBTV_BASE + 0x0220, 0x002d },
+		{ USBTV_BASE + 0x0225, 0x0028 },
+		{ USBTV_BASE + 0x024e, 0x0008 },
+		{ USBTV_BASE + 0x024f, 0x0002 },
+		{ USBTV_BASE + 0x0254, 0x0069 },
+		{ USBTV_BASE + 0x025a, 0x0016 },
+		{ USBTV_BASE + 0x025b, 0x0035 },
+		{ USBTV_BASE + 0x0263, 0x0021 },
+		{ USBTV_BASE + 0x0266, 0x0016 },
+		{ USBTV_BASE + 0x0267, 0x0036 },
+		/* Epilog */
+		{ USBTV_BASE + 0x024e, 0x0002 },
+		{ USBTV_BASE + 0x024f, 0x0002 },
+	};
+
 	ret = usbtv_configure_for_norm(usbtv, norm);
 
 	if (!ret) {
@@ -194,6 +227,8 @@ static int usbtv_select_norm(struct usbtv *usbtv, v4l2_std_id norm)
 			ret = usbtv_set_regs(usbtv, ntsc, ARRAY_SIZE(ntsc));
 		else if (norm & V4L2_STD_PAL)
 			ret = usbtv_set_regs(usbtv, pal, ARRAY_SIZE(pal));
+		else if (norm & V4L2_STD_SECAM)
+			ret = usbtv_set_regs(usbtv, secam, ARRAY_SIZE(secam));
 	}
 
 	return ret;
@@ -605,7 +640,8 @@ static int usbtv_s_std(struct file *file, void *priv, v4l2_std_id norm)
 	int ret = -EINVAL;
 	struct usbtv *usbtv = video_drvdata(file);
 
-	if ((norm & V4L2_STD_525_60) || (norm & V4L2_STD_PAL))
+	if ((norm & V4L2_STD_525_60) || (norm & V4L2_STD_PAL) ||
+			(norm & V4L2_STD_SECAM))
 		ret = usbtv_select_norm(usbtv, norm);
 
 	return ret;
diff --git a/drivers/media/usb/usbtv/usbtv.h b/drivers/media/usb/usbtv/usbtv.h
index 0231e449877e..77a368e90fd0 100644
--- a/drivers/media/usb/usbtv/usbtv.h
+++ b/drivers/media/usb/usbtv/usbtv.h
@@ -68,7 +68,7 @@
 #define USBTV_ODD(chunk)	((be32_to_cpu(chunk[0]) & 0x0000f000) >> 15)
 #define USBTV_CHUNK_NO(chunk)	(be32_to_cpu(chunk[0]) & 0x00000fff)
 
-#define USBTV_TV_STD  (V4L2_STD_525_60 | V4L2_STD_PAL)
+#define USBTV_TV_STD  (V4L2_STD_525_60 | V4L2_STD_PAL | V4L2_STD_SECAM)
 
 /* parameters for supported TV norms */
 struct usbtv_norm_params {