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google/rush: 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: I1ee0b61f5cbfe587ebd16b7dd9dce08d9d62c2c5
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: f4ee2ce3704711a9e00531b7599a1bcf194203ec
Original-Change-Id: I0bc8401e76b2c80a01083ac933a39f6cd4d1b78a
Original-Signed-off-by: Tom Warren <twarren@nvidia.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/229496
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Commit-Queue: Mike Frysinger <vapier@chromium.org>
Reviewed-on: http://review.coreboot.org/9429
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Tom Warren 2014-11-13 13:16:28 -07:00 committed by Patrick Georgi
parent 9f7d3ad136
commit 8315622ff1
2 changed files with 43 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
src/mainboard/google/rush/mainboard.c
View File

@ -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 @@ static const struct pad_config padcfgs[] = {
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 @@ static void setup_usb(void)
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));
@ -94,6 +126,9 @@ static void mainboard_init(device_t dev)
setup_ec_spi();
setup_usb();
setup_audio();
i2c_init(I2C1_BUS); /* for max98090 codec */
}
static void mainboard_enable(device_t dev)

5
src/soc/nvidia/tegra132/include/soc/clock.h
View File

@ -187,6 +187,9 @@ enum {
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 @@ enum {
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 */