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[media] bt8xx: add support for Tongwei Video Technology TD-3116 

The following patch adds support for the Tongwei Video Technology TD-3116 board. This
is a Bt878 based capture card with 16 inputs meant for surveilance applications.
It also offers a way to check which inputs have a video signal while capturing another
input. In addition there are a number of alarm inputs and outputs available and there
is microcontroller which is presumably intended for use as a system watchdog. None of
these extra capabilities are supported by the patch.

Signed-off-by: Peter De Schrijver <p2@psychaos.be>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Peter De Schrijver 2011-11-06 10:15:47 -03:00 committed by Mauro Carvalho Chehab
parent 3822c7cef7
commit de2843b663
2 changed files with 50 additions and 0 deletions
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49
drivers/media/video/bt8xx/bttv-cards.c
View File

@ -80,6 +80,8 @@ static void phytec_muxsel(struct bttv *btv, unsigned int input);
static void gv800s_muxsel(struct bttv *btv, unsigned int input);
static void gv800s_init(struct bttv *btv);
static void td3116_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);
@ -342,6 +344,7 @@ static struct CARD {
{ 0x15401835, BTTV_BOARD_PV183, "Provideo PV183-6" },
{ 0x15401836, BTTV_BOARD_PV183, "Provideo PV183-7" },
{ 0x15401837, BTTV_BOARD_PV183, "Provideo PV183-8" },
{ 0x3116f200, BTTV_BOARD_TVT_TD3116, "Tongwei Video Technology TD-3116" },
{ 0, -1, NULL }
};
@ -2880,6 +2883,16 @@ struct tvcard bttv_tvcards[] = {
.tuner_type = TUNER_ABSENT,
.tuner_addr = ADDR_UNSET,
},
[BTTV_BOARD_TVT_TD3116] = {
.name = "Tongwei Video Technology TD-3116",
.video_inputs = 16,
.gpiomask = 0xc00ff,
.muxsel = MUXSEL(2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2),
.muxsel_hook = td3116_muxsel,
.svhs = NO_SVHS,
.pll = PLL_28,
.tuner_type = TUNER_ABSENT,
},
};
static const unsigned int bttv_num_tvcards = ARRAY_SIZE(bttv_tvcards);
@ -3229,6 +3242,42 @@ static void geovision_muxsel(struct bttv *btv, unsigned int input)
gpio_bits(0xf, inmux);
}
/*
* The TD3116 has 2 74HC4051 muxes wired to the MUX0 input of a bt878.
* The first 74HC4051 has the lower 8 inputs, the second one the higher 8.
* The muxes are controlled via a 74HC373 latch which is connected to
* GPIOs 0-7. GPIO 18 is connected to the LE signal of the latch.
* Q0 of the latch is connected to the Enable (~E) input of the first
* 74HC4051. Q1 - Q3 are connected to S0 - S2 of the same 74HC4051.
* Q4 - Q7 are connected to the second 74HC4051 in the same way.
*/
static void td3116_latch_value(struct bttv *btv, u32 value)
{
gpio_bits((1<<18) | 0xff, value);
gpio_bits((1<<18) | 0xff, (1<<18) | value);
udelay(1);
gpio_bits((1<<18) | 0xff, value);
}
static void td3116_muxsel(struct bttv *btv, unsigned int input)
{
u32 value;
u32 highbit;
highbit = (input & 0x8) >> 3 ;
/* Disable outputs and set value in the mux */
value = 0x11; /* Disable outputs */
value |= ((input & 0x7) << 1) << (4 * highbit);
td3116_latch_value(btv, value);
/* Enable the correct output */
value &= ~0x11;
value |= ((highbit ^ 0x1) << 4) | highbit;
td3116_latch_value(btv, value);
}
/* ----------------------------------------------------------------------- */
static void bttv_reset_audio(struct bttv *btv)

1
drivers/media/video/bt8xx/bttv.h
View File

@ -183,6 +183,7 @@
#define BTTV_BOARD_GEOVISION_GV800S 0x9d
#define BTTV_BOARD_GEOVISION_GV800S_SL 0x9e
#define BTTV_BOARD_PV183 0x9f
#define BTTV_BOARD_TVT_TD3116 0xa0
/* more card-specific defines */