rush: audio: Add I2C1 init and audio clock enable/resets
This should allow the max98090 codec to play beeps via
AHUB/I2S1 thru the depthcharge sound driver.
BUG=none
BRANCH=none
TEST=Saw max98090 codec init signon and register dump.
No sound yet.
Change-Id: I0bc8401e76b2c80a01083ac933a39f6cd4d1b78a
Signed-off-by: Tom Warren <twarren@nvidia.com>
Reviewed-on: https://chromium-review.googlesource.com/229496
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
diff --git a/src/mainboard/google/rush/mainboard.c b/src/mainboard/google/rush/mainboard.c
index 8ea3f4e..bb4da19 100644
--- a/src/mainboard/google/rush/mainboard.c
+++ b/src/mainboard/google/rush/mainboard.c
@@ -25,6 +25,7 @@
#include <soc/clk_rst.h>
#include <soc/clock.h>
#include <soc/funitcfg.h>
+#include <soc/nvidia/tegra/i2c.h>
#include <soc/nvidia/tegra/usb.h>
#include <soc/padconfig.h>
#include <soc/spi.h>
@@ -67,9 +68,16 @@
PAD_CFG_GPIO_INPUT(USB_VBUS_EN1, PINMUX_PULL_UP),
};
+static const struct pad_config i2c1_pad[] = {
+ /* GEN1 I2C */
+ PAD_CFG_SFIO(GEN1_I2C_SCL, PINMUX_INPUT_ENABLE, I2C1),
+ PAD_CFG_SFIO(GEN1_I2C_SDA, PINMUX_INPUT_ENABLE, I2C1),
+};
+
static const struct funit_cfg funitcfgs[] = {
FUNIT_CFG(SDMMC3, PLLP, 48000, sdmmc3_pad, ARRAY_SIZE(sdmmc3_pad)),
FUNIT_CFG(SDMMC4, PLLP, 48000, sdmmc4_pad, ARRAY_SIZE(sdmmc4_pad)),
+ FUNIT_CFG(I2C1, PLLP, 100, i2c1_pad, ARRAY_SIZE(i2c1_pad)),
};
static void setup_ec_spi(void)
@@ -87,6 +95,30 @@
usb_setup_utmip((void *)TEGRA_USB3_BASE);
}
+/* Audio init: clocks and enables/resets */
+static void setup_audio(void)
+{
+ /* External peripheral 1: audio codec (max98090) using 12MHz CLK1 */
+ clock_configure_source(extperiph1, CLK_M, 12000);
+
+ /*
+ * We need 1.5MHz for I2S1. So, we use CLK_M. CLK_DIVIDER macro
+ * returns a divisor (0xe) a little bit off from the ideal value (0xd),
+ * but it's good enough for beeps.
+ */
+ clock_configure_source(i2s1, CLK_M, 1500);
+
+ clock_external_output(1); /* For external MAX98090 audio codec. */
+
+ /*
+ * Confirmed by NVIDIA hardware team, we need to take ALL audio devices
+ * connected to AHUB (AUDIO, APBIF, I2S, DAM, AMX, ADX, SPDIF, AFC) out
+ * of reset and clock-enabled, otherwise reading AHUB devices (in our
+ * case, I2S/APBIF/AUDIO<XBAR>) will hang.
+ */
+ clock_enable_audio();
+}
+
static void mainboard_init(device_t dev)
{
soc_configure_pads(padcfgs, ARRAY_SIZE(padcfgs));
@@ -94,14 +126,17 @@
setup_ec_spi();
setup_usb();
+
+ setup_audio();
+ i2c_init(I2C1_BUS); /* for max98090 codec */
}
static void mainboard_enable(device_t dev)
{
- dev->ops->init = &mainboard_init;
+ dev->ops->init = &mainboard_init;
}
struct chip_operations mainboard_ops = {
- .name = "rush",
- .enable_dev = mainboard_enable,
+ .name = "rush",
+ .enable_dev = mainboard_enable,
};
diff --git a/src/soc/nvidia/tegra132/include/soc/clock.h b/src/soc/nvidia/tegra132/include/soc/clock.h
index 34693cb..5bc8f23 100644
--- a/src/soc/nvidia/tegra132/include/soc/clock.h
+++ b/src/soc/nvidia/tegra132/include/soc/clock.h
@@ -187,6 +187,9 @@
PLLE = 7,
PLLA = 8,
UNUSED = 100,
+ UNUSED1 = 101,
+ UNUSED2 = 102,
+ UNUSED3 = 103,
};
#define CLK_SRC_DEV_ID(dev, src) CLK_SRC_##dev##_##src
@@ -221,6 +224,8 @@
CLK_SRC_DEVICE(SDMMC3, PLLP, PLLC2, PLLC, PLLC3, PLLM, PLLE, CLK_M),
CLK_SRC_DEVICE(SDMMC4, PLLP, PLLC2, PLLC, PLLC3, PLLM, PLLE, CLK_M),
CLK_SRC_DEVICE(UARTA, PLLP, PLLC2, PLLC, PLLC3, PLLM, UNUSED, CLK_M),
+ CLK_SRC_DEVICE(i2s1, PLLA, UNUSED, CLK_S, UNUSED1, PLLP, UNUSED2, CLK_M),
+ CLK_SRC_DEVICE(extperiph1, PLLA, CLK_S, PLLP, CLK_M, PLLE, UNUSED, UNUSED1),
};
/* PLL stabilization delay in usec */
