mb/google/guybrush: Add variant_espi_gpio_table

Add separate gpio table for early eSPI bus init. Remove espi GPIO from
early_gpio_table. This allows for initializing eSPI separately from
other GPIOs. Simplify verstage_mainboard_early_init.

BUG=b:200578885
BRANCH=None
TEST=Build and boot guybrush

Change-Id: I0cd439f207df7c27575ae363b207293d40485bf8
Signed-off-by: Rob Barnes <robbarnes@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59082
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Reviewed-by: Kangheui Won <khwon@chromium.org>

src/mainboard/google/guybrush/bootblock.c

@@ -31,8 +31,8 @@ void mb_set_up_early_espi(void)
 void bootblock_mainboard_early_init(void)
 {
 	uint32_t dword;
-	size_t base_num_gpios, override_num_gpios;
-	const struct soc_amd_gpio *base_gpios, *override_gpios;
+	size_t num_gpios, override_num_gpios;
+	const struct soc_amd_gpio *gpios, *override_gpios;
 
 	/* Beware that the bit definitions for LPC_LDRQ0_PU_EN and LPC_LDRQ0_PD_EN are swapped
 	   on Picasso and older compared to Renoir/Cezanne and newer */
@@ -50,11 +50,12 @@ void bootblock_mainboard_early_init(void)
 	if (CONFIG(VBOOT_STARTS_BEFORE_BOOTBLOCK))
 		return;
 
-	base_gpios = variant_early_gpio_table(&base_num_gpios);
-	override_gpios = variant_early_override_gpio_table(&override_num_gpios);
+	gpios = variant_espi_gpio_table(&num_gpios);
+	gpio_configure_pads(gpios, num_gpios);
 
-	gpio_configure_pads_with_override(base_gpios, base_num_gpios,
-			override_gpios, override_num_gpios);
+	gpios = variant_early_gpio_table(&num_gpios);
+	override_gpios = variant_early_override_gpio_table(&override_num_gpios);
+	gpio_configure_pads_with_override(gpios, num_gpios, override_gpios, override_num_gpios);
 
 	/* Set a timer to make sure there's enough delay for
 	 * the Fibocom 350 PCIe init

src/mainboard/google/guybrush/variants/baseboard/gpio.c

@@ -206,10 +206,23 @@ static const struct soc_amd_gpio early_gpio_table[] = {
 	PAD_NF(GPIO_19, I2C3_SCL, PULL_NONE),
 	/* I2C3_SDA */
 	PAD_NF(GPIO_20, I2C3_SDA, PULL_NONE),
-	/* ESPI_CS_L */
-	PAD_NF(GPIO_30, ESPI_CS_L, PULL_NONE),
 	/* GSC_SOC_INT_L */
 	PAD_INT(GPIO_85, PULL_NONE, EDGE_LOW, STATUS_DELIVERY),
+
+/* Enable UART 0 */
+	/* UART0_RXD */
+	PAD_NF(GPIO_141, UART0_RXD, PULL_NONE),
+	/* UART0_TXD */
+	PAD_NF(GPIO_143, UART0_TXD, PULL_NONE),
+
+/* Support EC trusted */
+	/* SD_EX_PRSNT_L(Guybrush BoardID 1 only) / EC_IN_RW_OD */
+	PAD_GPI(GPIO_91, PULL_NONE),
+};
+
+static const struct soc_amd_gpio espi_gpio_table[] = {
+	/* ESPI_CS_L */
+	PAD_NF(GPIO_30, ESPI_CS_L, PULL_NONE),
 	/* ESPI_SOC_CLK */
 	PAD_NF(GPIO_86, SPI_CLK, PULL_NONE),
 	/* ESPI1_DATA0 */
@@ -222,16 +235,6 @@ static const struct soc_amd_gpio early_gpio_table[] = {
 	PAD_NF(GPIO_107, SPI2_HOLD_L_ESPI2_D3, PULL_NONE),
 	/* ESPI_ALERT_L */
 	PAD_NF(GPIO_108, ESPI_ALERT_D1, PULL_NONE),
-
-/* Enable UART 0 */
-	/* UART0_RXD */
-	PAD_NF(GPIO_141, UART0_RXD, PULL_NONE),
-	/* UART0_TXD */
-	PAD_NF(GPIO_143, UART0_TXD, PULL_NONE),
-
-/* Support EC trusted */
-	/* SD_EX_PRSNT_L(Guybrush BoardID 1 only) / EC_IN_RW_OD */
-	PAD_GPI(GPIO_91, PULL_NONE),
 };
 
 /* Power-on timing requirements:
@@ -344,3 +347,9 @@ const __weak struct soc_amd_gpio *variant_sleep_gpio_table(size_t *size)
 	*size = ARRAY_SIZE(sleep_gpio_table);
 	return sleep_gpio_table;
 }
+
+const __weak struct soc_amd_gpio *variant_espi_gpio_table(size_t *size)
+{
+	*size = ARRAY_SIZE(espi_gpio_table);
+	return espi_gpio_table;
+}

src/mainboard/google/guybrush/variants/baseboard/include/baseboard/variants.h

@@ -40,6 +40,9 @@ const struct soc_amd_gpio *variant_pcie_gpio_table(size_t *size);
 /* This function provides GPIO settings before entering sleep. */
 const struct soc_amd_gpio *variant_sleep_gpio_table(size_t *size);
 
+/* This function provides GPIO settings for eSPI bus. */
+const struct soc_amd_gpio *variant_espi_gpio_table(size_t *size);
+
 bool variant_has_pcie_wwan(void);
 
 void variant_update_dxio_descriptors(fsp_dxio_descriptor *dxio_descriptors);

src/mainboard/google/guybrush/verstage.c

@@ -4,41 +4,45 @@
 #include <amdblocks/gpio.h>
 #include <arch/io.h>
 #include <baseboard/variants.h>
+#include <psp_verstage.h>
 #include <security/vboot/vboot_common.h>
 #include <soc/southbridge.h>
 
-static void setup_gpio(void)
+void verstage_mainboard_early_init(void)
 {
 	const struct soc_amd_gpio *gpios, *override_gpios;
 	size_t num_gpios, override_num_gpios;
 
-	if (CONFIG(VBOOT_STARTS_BEFORE_BOOTBLOCK)) {
-		gpios = variant_early_gpio_table(&num_gpios);
-		override_gpios = variant_early_override_gpio_table(&override_num_gpios);
+	if (!CONFIG(VBOOT_STARTS_BEFORE_BOOTBLOCK))
+		return;
 
-		gpio_configure_pads_with_override(gpios, num_gpios,
-				override_gpios, override_num_gpios);
-	}
+	gpios = variant_early_gpio_table(&num_gpios);
+	override_gpios = variant_early_override_gpio_table(&override_num_gpios);
+	gpio_configure_pads_with_override(gpios, num_gpios, override_gpios, override_num_gpios);
 }
 
-void verstage_mainboard_early_init(void)
+void verstage_mainboard_espi_init(void)
 {
-	setup_gpio();
+	const struct soc_amd_gpio *gpios;
+	size_t num_gpios;
+	uint32_t dword;
+
+	if (!CONFIG(VBOOT_STARTS_BEFORE_BOOTBLOCK))
+		return;
+
+	gpios = variant_espi_gpio_table(&num_gpios);
+	gpio_configure_pads(gpios, num_gpios);
 
 	/*
-	 * TODO : Make common function in cezanne code and just call it
-	 * when PCI access is fixed in the PSP (b/186602472).
-	 * For now the PSP doesn't configure LPC so it should be fine.
-	 */
-	if (CONFIG(VBOOT_STARTS_BEFORE_BOOTBLOCK)) {
-		uint32_t dword;
-		printk(BIOS_DEBUG, "Verstage configure eSPI\n");
-		dword = pm_io_read32(PM_SPI_PAD_PU_PD);
-		dword |= PM_ESPI_CS_USE_DATA2;
-		pm_io_write32(PM_SPI_PAD_PU_PD, dword);
+	* TODO : Make common function in cezanne code and just call it
+	* when PCI access is fixed in the PSP (b/186602472).
+	* For now the PSP doesn't configure LPC so it should be fine.
+	*/
+	dword = pm_io_read32(PM_SPI_PAD_PU_PD);
+	dword |= PM_ESPI_CS_USE_DATA2;
+	pm_io_write32(PM_SPI_PAD_PU_PD, dword);
 
-		dword = pm_io_read32(PM_ACPI_CONF);
-		dword |= PM_ACPI_S5_LPC_PIN_MODE | PM_ACPI_S5_LPC_PIN_MODE_SEL;
-		pm_io_write32(PM_ACPI_CONF, dword);
-	}
+	dword = pm_io_read32(PM_ACPI_CONF);
+	dword |= PM_ACPI_S5_LPC_PIN_MODE | PM_ACPI_S5_LPC_PIN_MODE_SEL;
+	pm_io_write32(PM_ACPI_CONF, dword);
 }

src/soc/amd/common/psp_verstage/include/psp_verstage.h

@@ -48,6 +48,7 @@
 void test_svc_calls(void);
 uint32_t unmap_fch_devices(void);
 uint32_t verstage_soc_early_init(void);
+void verstage_mainboard_espi_init(void);
 void verstage_soc_init(void);
 uintptr_t *map_spi_rom(void);
 

src/soc/amd/common/psp_verstage/psp_verstage.c

@@ -24,6 +24,7 @@
 extern char _bss_start, _bss_end;
 
 void __weak verstage_mainboard_early_init(void) {}
+void __weak verstage_mainboard_espi_init(void) {}
 void __weak verstage_mainboard_init(void) {}
 uint32_t __weak get_max_workbuf_size(uint32_t *size)
 {
@@ -233,8 +234,11 @@ void Main(void)
 		svc_debug_print("verstage_soc_early_init failed! -- rebooting\n");
 		vboot_reboot();
 	}
-	svc_debug_print("calling verstage_mainboard_early_init\n");
 
+	printk(BIOS_DEBUG, "calling verstage_mainboard_espi_init\n");
+	verstage_mainboard_espi_init();
+
+	printk(BIOS_DEBUG, "calling verstage_mainboard_early_init\n");
 	verstage_mainboard_early_init();
 
 	svc_write_postcode(POSTCODE_LATE_INIT);