V4L/DVB (4050): Add NTSC sliced VBI support to the cx25840 module.

NTSC sliced VBI support by Christopher Neufeld <television@cneufeld.ca>
with additional fixes by Hans Verkuil <hverkuil@xs4all.nl>.

Signed-off-by: Christopher Neufeld <television@cneufeld.ca>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

3 files changed, 24 insertions, 5 deletions

diff --git a/drivers/media/video/cx25840/cx25840-core.c b/drivers/media/video/cx25840/cx25840-core.c
index e4655e3c2520..6d7207e67d6f 100644
--- a/drivers/media/video/cx25840/cx25840-core.c
+++ b/drivers/media/video/cx25840/cx25840-core.c
@@ -10,6 +10,9 @@
  *
  * VBI support by Hans Verkuil <hverkuil@xs4all.nl>.
  *
+ * NTSC sliced VBI support by Christopher Neufeld <television@cneufeld.ca>
+ * with additional fixes by 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
@@ -982,6 +985,7 @@ static int cx25840_detect_client(struct i2c_adapter *adapter, int address,
         state->audclk_freq = 48000;
         state->pvr150_workaround = 0;
         state->audmode = V4L2_TUNER_MODE_LANG1;
+        state->vbi_line_offset = 8;
         state->id = id;
 
         if (state->is_cx25836)
diff --git a/drivers/media/video/cx25840/cx25840-core.h b/drivers/media/video/cx25840/cx25840-core.h
index 69d7bd2bcb29..b1321920dfe7 100644
--- a/drivers/media/video/cx25840/cx25840-core.h
+++ b/drivers/media/video/cx25840/cx25840-core.h
@@ -40,6 +40,7 @@ struct cx25840_state {
         enum cx25840_audio_input aud_input;
         u32 audclk_freq;
         int audmode;
+        int vbi_line_offset;
         enum v4l2_chip_ident id;
         int is_cx25836;
 };
diff --git a/drivers/media/video/cx25840/cx25840-vbi.c b/drivers/media/video/cx25840/cx25840-vbi.c
index 57feca288d2b..c124974c55b1 100644
--- a/drivers/media/video/cx25840/cx25840-vbi.c
+++ b/drivers/media/video/cx25840/cx25840-vbi.c
@@ -84,6 +84,7 @@ static int decode_vps(u8 * dst, u8 * p)
 
 void cx25840_vbi_setup(struct i2c_client *client)
 {
+        struct cx25840_state *state = i2c_get_clientdata(client);
         v4l2_std_id std = cx25840_get_v4lstd(client);
 
         if (std & ~V4L2_STD_NTSC) {
@@ -117,6 +118,7 @@ void cx25840_vbi_setup(struct i2c_client *client)
 
                 cx25840_write(client, 0x47e, 0x0a);
                 cx25840_write(client, 0x47f, 0x01);
+                state->vbi_line_offset = 5;
         } else {
                 /* datasheet startup, step 8d */
                 cx25840_write(client, 0x49f, 0x14);
@@ -140,11 +142,13 @@ void cx25840_vbi_setup(struct i2c_client *client)
                 cx25840_write(client, 0x47d, 0x7c);
                 cx25840_write(client, 0x47e, 0x08);
                 cx25840_write(client, 0x47f, 0x00);
+                state->vbi_line_offset = 8;
         }
 }
 
 int cx25840_vbi(struct i2c_client *client, unsigned int cmd, void *arg)
 {
+        struct cx25840_state *state = i2c_get_clientdata(client);
         struct v4l2_format *fmt;
         struct v4l2_sliced_vbi_format *svbi;
 
@@ -211,7 +215,7 @@ int cx25840_vbi(struct i2c_client *client, unsigned int cmd, void *arg)
                 cx25840_vbi_setup(client);
 
                 /* Sliced VBI */
-                cx25840_write(client, 0x404, 0x36);     /* Ancillery data */
+                cx25840_write(client, 0x404, 0x32);     /* Ancillary data */
                 cx25840_write(client, 0x406, 0x13);
                 cx25840_write(client, 0x47f, vbi_offset);
 
@@ -248,8 +252,18 @@ int cx25840_vbi(struct i2c_client *client, unsigned int cmd, void *arg)
                         }
                 }
 
-                for (x = 1, i = 0x424; i <= 0x434; i++, x++) {
-                        cx25840_write(client, i, lcr[6 + x]);
+                if (is_pal) {
+                        for (x = 1, i = 0x424; i <= 0x434; i++, x++) {
+                                cx25840_write(client, i, lcr[6 + x]);
+                        }
+                }
+                else {
+                        for (x = 1, i = 0x424; i <= 0x430; i++, x++) {
+                                cx25840_write(client, i, lcr[9 + x]);
+                        }
+                        for (i = 0x431; i <= 0x434; i++) {
+                                cx25840_write(client, i, 0);
+                        }
                 }
 
                 cx25840_write(client, 0x43c, 0x16);
@@ -257,7 +271,7 @@ int cx25840_vbi(struct i2c_client *client, unsigned int cmd, void *arg)
                 if (is_pal) {
                         cx25840_write(client, 0x474, 0x2a);
                 } else {
-                        cx25840_write(client, 0x474, 0x1a + 6);
+                        cx25840_write(client, 0x474, 0x22);
                 }
                 break;
         }
@@ -278,7 +292,7 @@ int cx25840_vbi(struct i2c_client *client, unsigned int cmd, void *arg)
                 id1 = p[-1];
                 id2 = p[0] & 0xf;
                 l = p[2] & 0x3f;
-                l += 5;
+                l += state->vbi_line_offset;
                 p += 4;
 
                 switch (id2) {