[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>
diff --git a/drivers/media/video/bt8xx/bttv-cards.c b/drivers/media/video/bt8xx/bttv-cards.c
index 076b7f2..ff2933a 100644
--- a/drivers/media/video/bt8xx/bttv-cards.c
+++ b/drivers/media/video/bt8xx/bttv-cards.c
@@ -80,6 +80,8 @@
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 @@
{ 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 @@
.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 @@
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)