V4L/DVB (7366): Support for a 16-channel bt878 card

I have what looks like a Geovision GV-600 (or 650) card. It has a large
chip in the middle labeled

CONEXANT
FUSION 878A
25878-13
E345881.1
0312 TAIWAN

It has an audio connector coming out from a chip labeled

ATMEL
0242
AT89C2051-24PI

It is identified as follows on my Debian GNU/Linux Etch (kernel 2.6.18)

...
01:0a.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11)
01:0a.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 11)
...
01:0a.0 0400: 109e:036e (rev 11)
        Subsystem: 008a:763c
        Flags: bus master, medium devsel, latency 64, IRQ 58
        Memory at dfffe000 (32-bit, prefetchable) [size=4K]
        Capabilities: [44] Vital Product Data
        Capabilities: [4c] Power Management version 2

01:0a.1 0480: 109e:0878 (rev 11)
        Subsystem: 008a:763c
        Flags: bus master, medium devsel, latency 64, IRQ 58
        Memory at dffff000 (32-bit, prefetchable) [size=4K]
        Capabilities: [44] Vital Product Data
        Capabilities: [4c] Power Management version 2

It was being detected as a GENERIC UNKNOWN CARD both by the 2.6.18
kernel and the latest v4l-dvb drivers, but it did not work at all. The
card has sixteen (16) BNC video inputs, four of them on the board itself
and twelve on three daughter-cards. It has a single bt878 chip, no tuner
and what looks like and audio input. After doing some research I managed
to get only eight channels working by forcing card=125 and those DID NOT
match channels 0-7 on the card, and no audio.

Based on what was working for card=125, I added the card definition
block, added a specific muxsel routine and got the card working fully
with xawtv, where the sixteen channels show up as Composite0 to
Composite15, matching the channel labels in the card and daughter-cards.
I have made no efforts yet to get audio working, but would appreciate
any pointers.

Signed-off-by: Ernesto Hernández-Novich <emhn@usb.ve>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

Documentation/video4linux/CARDLIST.bttv

@@ -148,3 +148,4 @@
 147 -> VoodooTV 200 (USA)                                  [121a:3000]
 148 -> DViCO FusionHDTV 2                                  [dbc0:d200]
 149 -> Typhoon TV-Tuner PCI (50684)
+150 -> Geovision GV-600                                    [008a:763c]

drivers/media/video/bt8xx/bttv-cards.c

@@ -71,6 +71,8 @@ static void kodicom4400r_init(struct bttv *btv);
 static void sigmaSLC_muxsel(struct bttv *btv, unsigned int input);
 static void sigmaSQ_muxsel(struct bttv *btv, unsigned int input);
 
+static void geovision_muxsel(struct bttv *btv, unsigned int input);
+
 static int terratec_active_radio_upgrade(struct bttv *btv);
 static int tea5757_read(struct bttv *btv);
 static int tea5757_write(struct bttv *btv, int value);
@@ -301,6 +303,7 @@ static struct CARD {
 	{ 0xd50018ac, BTTV_BOARD_DVICO_FUSIONHDTV_5_LITE,    "DViCO FusionHDTV 5 Lite" },
 	{ 0x00261822, BTTV_BOARD_TWINHAN_DST,	"DNTV Live! Mini "},
 	{ 0xd200dbc0, BTTV_BOARD_DVICO_FUSIONHDTV_2,	"DViCO FusionHDTV 2" },
+	{ 0x763c008a, BTTV_BOARD_GEOVISION_GV600,	"GeoVision GV-600" },
 
 	{ 0, -1, NULL }
 };
@@ -2994,6 +2997,24 @@ struct tvcard bttv_tvcards[] = {
 		.tuner_addr     = ADDR_UNSET,
 		.radio_addr     = ADDR_UNSET,
 	},
+	[BTTV_BOARD_GEOVISION_GV600] = {
+		/* emhn@usb.ve */
+		.name             = "Geovision GV-600",
+		.video_inputs     = 16,
+		.audio_inputs     = 0,
+		.tuner            = UNSET,
+		.svhs             = UNSET,
+		.gpiomask         = 0x0,
+		.muxsel           = { 2, 2, 2, 2, 2, 2, 2, 2,
+				      2, 2, 2, 2, 2, 2, 2, 2 },
+		.muxsel_hook      = geovision_muxsel,
+		.gpiomux          = { 0 },
+		.no_msp34xx       = 1,
+		.pll              = PLL_28,
+		.tuner_type       = UNSET,
+		.tuner_addr	  = ADDR_UNSET,
+		.radio_addr       = ADDR_UNSET,
+	},
 };
 
 static const unsigned int bttv_num_tvcards = ARRAY_SIZE(bttv_tvcards);
@@ -3333,6 +3354,13 @@ static void sigmaSLC_muxsel(struct bttv *btv, unsigned int input)
 	gpio_bits( 3<<9, inmux<<9 );
 }
 
+static void geovision_muxsel(struct bttv *btv, unsigned int input)
+{
+	unsigned int inmux = input % 16;
+	gpio_inout(0xf, 0xf);
+	gpio_bits(0xf, inmux);
+}
+
 /* ----------------------------------------------------------------------- */
 
 static void bttv_reset_audio(struct bttv *btv)

drivers/media/video/bt8xx/bttv.h

@@ -173,6 +173,7 @@
 #define BTTV_BOARD_VOODOOTV_200		   0x93
 #define BTTV_BOARD_DVICO_FUSIONHDTV_2	   0x94
 #define BTTV_BOARD_TYPHOON_TVTUNERPCI	   0x95
+#define BTTV_BOARD_GEOVISION_GV600	   0x96
 
 
 /* more card-specific defines */