soc/amd/picasso: allow USB_PD port setting override

Allow to override the RFMUX setting if the board does not use PD chip.

BUG=b:177389383
BRANCH=none
TEST=Build; Check the USB_PD port been override.

Change-Id: Idd559b67668846805005a6e00f5a84655310f348
Signed-off-by: Chris Wang <chris.wang@amd.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49932
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

3 files changed, 46 insertions, 0 deletions

diff --git a/src/soc/amd/picasso/chip.h b/src/soc/amd/picasso/chip.h
index be30efa87c..244d7831ec 100644
--- a/src/soc/amd/picasso/chip.h
+++ b/src/soc/amd/picasso/chip.h
@@ -48,7 +48,25 @@ union __packed usb3_force_gen1 {
 		uint8_t usb3_port_force_gen1_en;
 };
 
+enum rfmux_configuration_setting {
+	USB_PD_RFMUX_SAFE_STATE = 0x0,
+	USB_PD_RFMUX_USB31_MODE = 0x1,
+	USB_PD_RFMUX_USB31_MODE_FLIP = 0x2,
+	USB_PD_RFMUX_ATE_MODE = 0x3,
+	USB_PD_RFMUX_DP_X2_MODE = 0x4,
+	USB_PD_RFMUX_MF_MODE_ALT_D_F = 0x6,
+	USB_PD_RFMUX_DP_X2_MODE_FLIP = 0x8,
+	USB_PD_RFMUX_MF_MODE_ALT_D_F_FLIP = 0x9,
+	USB_PD_RFMUX_DP_X4_MODE = 0xc,
+};
+
+struct usb_pd_control {
+		uint8_t rfmux_override_en;
+		uint32_t rfmux_config;
+};
+
 #define USB_PORT_COUNT	6
+#define USB_PD_PORT_COUNT 2
 
 enum sd_emmc_driver_strength {
 	SD_EMMC_DRIVE_STRENGTH_B,
@@ -257,6 +275,9 @@ struct soc_amd_picasso_config {
 	uint8_t pwron_varybl_to_blon;
 	uint8_t pwrdown_bloff_to_varybloff;
 	uint8_t min_allowed_bl_level;
+
+	/* allow USB PD port setting override */
+	struct usb_pd_control usb_pd_config_override[USB_PD_PORT_COUNT];
 };
 
 #endif /* __PICASSO_CHIP_H__ */
diff --git a/src/soc/amd/picasso/fch.c b/src/soc/amd/picasso/fch.c
index 4fdaa391e7..4db7a8c615 100644
--- a/src/soc/amd/picasso/fch.c
+++ b/src/soc/amd/picasso/fch.c
@@ -101,6 +101,22 @@ void sb_clk_output_48Mhz(void)
 	misc_write32(MISC_CLK_CNTL1, ctrl);
 }
 
+static void sb_rfmux_config_override(void)
+{
+	u8 port;
+	const struct soc_amd_picasso_config *cfg;
+
+	cfg = config_of_soc();
+
+	for (port = 0; port < USB_PD_PORT_COUNT; port++) {
+		if (cfg->usb_pd_config_override[port].rfmux_override_en) {
+			write32((void *)(USB_PD_PORT_CONTROL + PD_PORT_MUX_OFFSET(port)),
+				cfg->usb_pd_config_override[port].rfmux_config
+				| USB_PD_RFMUX_OVERRIDE);
+		}
+	}
+}
+
 static void sb_init_acpi_ports(void)
 {
 	u32 reg;
@@ -218,6 +234,8 @@ void southbridge_init(void *chip_info)
 	gpp_clk_setup();
 
 	sb_clk_output_48Mhz();
+
+	sb_rfmux_config_override();
 }
 
 void southbridge_final(void *chip_info)
diff --git a/src/soc/amd/picasso/include/soc/i2c.h b/src/soc/amd/picasso/include/soc/i2c.h
index 3e94a1ad62..41b930b186 100644
--- a/src/soc/amd/picasso/include/soc/i2c.h
+++ b/src/soc/amd/picasso/include/soc/i2c.h
@@ -21,6 +21,13 @@ struct soc_amd_i2c_save {
 #define I2C2_SCL_PIN_IOMUX_GPIOxx	GPIO_113_IOMUX_GPIOxx
 #define I2C3_SCL_PIN_IOMUX_GPIOxx	GPIO_19_IOMUX_GPIOxx
 
+#define I2C4_USB_PD_CTRL_OFFSET	0x600
+#define USB_PD_PORT_CONTROL	(APU_I2C4_BASE + I2C4_USB_PD_CTRL_OFFSET)
+#define PD_PORT_MUX_OFFSET(x)	(0x10 * (x))
+#define DP_REVERSE	BIT(4)
+#define USB_PD_RFMUX_OVERRIDE	BIT(8)
+#define USB_PD_DP_OVERRIDE	BIT(9)
+
 void sb_reset_i2c_slaves(void);
 
 /* Sets the base address for the specific I2C bus. */