mb/google/geralt: Add MAX98390 support for Geralt

Add a config "USE_MAX98390" to enable MAX98390 support.

MAX98390 is an I2S smart amplifier used in Geralt. It is also the
default speaker for Geralt reference board.

BUG=b:250459803
BRANCH=none
TEST=Verify beep function through CLI in depthcharge successfully.

Change-Id: I814f440cc5ac2a13404d01fb3baafeec092b1e74
Signed-off-by: Trevor Wu <trevor.wu@mediatek.com>
Signed-off-by: jason-ch chen <Jason-ch.Chen@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73412
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>

4 files changed, 54 insertions, 0 deletions

diff --git a/src/mainboard/google/geralt/Kconfig b/src/mainboard/google/geralt/Kconfig
index 8de4fea931..af4d7e0d80 100644
--- a/src/mainboard/google/geralt/Kconfig
+++ b/src/mainboard/google/geralt/Kconfig
@@ -60,4 +60,14 @@ config DRIVER_TPM_I2C_ADDR
 config SDCARD_INIT
 	bool
 	default y
+
+choice
+	prompt "Speaker AMP for Geralt"
+	default USE_MAX98390 if BOARD_GOOGLE_GERALT
+
+config USE_MAX98390
+	bool "MAX98390"
+
+endchoice
+
 endif
diff --git a/src/mainboard/google/geralt/chromeos.c b/src/mainboard/google/geralt/chromeos.c
index 266fc78db1..10fc9d314f 100644
--- a/src/mainboard/google/geralt/chromeos.c
+++ b/src/mainboard/google/geralt/chromeos.c
@@ -18,6 +18,7 @@ void setup_chromeos_gpios(void)
 	/* Set up GPOs */
 	gpio_output(GPIO_AP_EC_WARM_RST_REQ, 0);
 	gpio_output(GPIO_EN_SPKR, 0);
+	gpio_output(GPIO_RST_SPKR_L, 0);
 	gpio_output(GPIO_XHCI_INIT_DONE, 0);
 }
 
@@ -39,6 +40,13 @@ void fill_lb_gpios(struct lb_gpios *gpios)
 		};
 		lb_add_gpios(gpios, sd_card_gpios, ARRAY_SIZE(sd_card_gpios));
 	}
+
+	if (CONFIG(USE_MAX98390)) {
+		struct lb_gpio max98390_gpios[] = {
+			{GPIO_RST_SPKR_L.id, ACTIVE_LOW, -1, "speaker reset"},
+		};
+		lb_add_gpios(gpios, max98390_gpios, ARRAY_SIZE(max98390_gpios));
+	}
 }
 
 int tis_plat_irq_status(void)
diff --git a/src/mainboard/google/geralt/gpio.h b/src/mainboard/google/geralt/gpio.h
index 36f488e7b8..126cfe8f3f 100644
--- a/src/mainboard/google/geralt/gpio.h
+++ b/src/mainboard/google/geralt/gpio.h
@@ -12,8 +12,13 @@
 #define GPIO_EC_AP_INT_ODL	GPIO(DPI_DE)
 #define GPIO_EN_SPKR		GPIO(I2SIN_D2)
 #define GPIO_GSC_AP_INT_ODL	GPIO(GPIO00)
+#define GPIO_RST_SPKR_L		GPIO(I2SO2_D1)
 #define GPIO_XHCI_INIT_DONE	GPIO(DPI_CK)
 
+#define GPIO_I2SI1_LRCK		GPIO(I2SO2_D2)
+#define GPIO_I2SI1_BCK		GPIO(I2SIN_D3)
+#define GPIO_I2SO1_D0		GPIO(GPIO11)
+
 #define GPIO_EDP_BL_PWM_1V8		GPIO(DISP_PWM1)
 #define GPIO_EDP_HPD_1V8		GPIO(GPIO17)
 #define GPIO_EN_PP3300_EDP_DISP_X	GPIO(DSI1_LCM_RST)
diff --git a/src/mainboard/google/geralt/mainboard.c b/src/mainboard/google/geralt/mainboard.c
index ee8b005d3e..1422398342 100644
--- a/src/mainboard/google/geralt/mainboard.c
+++ b/src/mainboard/google/geralt/mainboard.c
@@ -3,13 +3,42 @@
 #include <bootmode.h>
 #include <device/device.h>
 #include <soc/bl31.h>
+#include <soc/i2c.h>
 #include <soc/msdc.h>
 #include <soc/mt6359p.h>
+#include <soc/mtcmos.h>
 #include <soc/usb.h>
 
 #include "display.h"
 #include "gpio.h"
 
+#define AFE_SE_SECURE_CON	(AUDIO_BASE + 0x17a8)
+
+static void configure_i2s(void)
+{
+	/* Audio PWR */
+	mtcmos_audio_power_on();
+	mtcmos_protect_audio_bus();
+
+	/* Switch to normal mode */
+	write32p(AFE_SE_SECURE_CON, 0x0);
+
+	/* SoC I2S */
+	gpio_set_mode(GPIO_I2SI1_LRCK, PAD_I2SO2_D2_FUNC_TDMIN_LRCK);
+	gpio_set_mode(GPIO_I2SI1_BCK, PAD_I2SIN_D3_FUNC_TDMIN_BCK);
+	gpio_set_mode(GPIO_I2SO1_D0, PAD_GPIO11_FUNC_I2SO1_D0);
+}
+
+static void configure_audio(void)
+{
+	if (CONFIG(USE_MAX98390)) {
+		printk(BIOS_DEBUG, "Configure MAX98390 audio\n");
+
+		mtk_i2c_bus_init(I2C0, I2C_SPEED_FAST);
+		configure_i2s();
+	}
+}
+
 static void mainboard_init(struct device *dev)
 {
 	mt6359p_init_pmif_arb();
@@ -23,6 +52,8 @@ static void mainboard_init(struct device *dev)
 
 	mtk_msdc_configure_emmc(true);
 
+	configure_audio();
+
 	if (CONFIG(SDCARD_INIT))
 		mtk_msdc_configure_sdcard();