soc/amd/picasso: add eMMC MMIO device to devicetree

Add the eMMC MMIO device to the devicetree and make it use the common
AMD eMMC driver. Since there is now a device for this in the devicetree,
also use this device to determine if the FSP should be told if the eMMC
controller is supposed to be disabled.

TEST=On Mandolin the eMMC controller both disappears in the Windows 10
     device manager and in dmesg on Ubuntu 2022.04 LTS
TEST=Morphius with NVMe SSD still works

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I5453b69df776d2ce1f3be11e37cd26c8c64f0cd5
Reviewed-on: https://review.coreboot.org/c/coreboot/+/77990
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>

src/mainboard/amd/bilby/devicetree.cb

@@ -8,10 +8,6 @@ chip soc/amd/picasso
 	register "common_config.fadt_boot_arch" = "ACPI_FADT_LEGACY_DEVICES | ACPI_FADT_8042"
 	register "common_config.fadt_flags" = "ACPI_FADT_SLEEP_BUTTON" # See table 5-34 ACPI 6.3 spec
 
-	register "emmc_config" = "{
-		.timing = SD_EMMC_DISABLE,
-	}"
-
 	register "has_usb2_phy_tune_params" = "1"
 
 	# Controller0 Port0 Default

src/mainboard/amd/mandolin/variants/cereme/devicetree.cb

@@ -8,10 +8,6 @@ chip soc/amd/picasso
 	register "common_config.fadt_boot_arch" = "ACPI_FADT_LEGACY_DEVICES | ACPI_FADT_8042"
 	register "common_config.fadt_flags" = "ACPI_FADT_SLEEP_BUTTON" # See table 5-34 ACPI 6.3 spec
 
-	register "emmc_config" = "{
-		.timing = SD_EMMC_DISABLE,
-	}"
-
 	register "has_usb2_phy_tune_params" = "1"
 
 	# Controller0 Port0 Default

src/mainboard/amd/mandolin/variants/mandolin/devicetree.cb

@@ -8,10 +8,6 @@ chip soc/amd/picasso
 	register "common_config.fadt_boot_arch" = "ACPI_FADT_LEGACY_DEVICES | ACPI_FADT_8042"
 	register "common_config.fadt_flags" = "ACPI_FADT_SLEEP_BUTTON" # See table 5-34 ACPI 6.3 spec
 
-	register "emmc_config" = "{
-		.timing = SD_EMMC_DISABLE,
-	}"
-
 	register "has_usb2_phy_tune_params" = "1"
 
 	# Controller0 Port0 Default

src/mainboard/google/zork/variants/baseboard/dalboz/devicetree.cb

@@ -388,4 +388,6 @@ chip soc/amd/picasso
 
 	device ref uart_0 on end # console
 
+	device ref emmc on end
+
 end	# chip soc/amd/picasso

src/mainboard/google/zork/variants/baseboard/trembyle/devicetree.cb

@@ -436,4 +436,6 @@ chip soc/amd/picasso
 
 	device ref uart_0 on end # console
 
+	device ref emmc on end
+
 end	# chip soc/amd/picasso

src/mainboard/google/zork/variants/berknip/variant.c

@@ -4,13 +4,9 @@
 
 void variant_devtree_update(void)
 {
-	struct soc_amd_picasso_config *cfg;
-
-	cfg = config_of_soc();
-
 	/*
 	 * Enable eMMC if eMMC bit is set in FW_CONFIG or device is unprovisioned.
 	 */
 	if (!(variant_has_emmc() || boot_is_factory_unprovisioned()))
-		cfg->emmc_config.timing = SD_EMMC_DISABLE;
+		DEV_PTR(emmc)->enabled = 0;
 }

src/mainboard/google/zork/variants/dalboz/variant.c

@@ -59,7 +59,7 @@ void variant_devtree_update(void)
 			cfg->emmc_config.timing = SD_EMMC_EMMC_HS200;
 		}
 	} else {
-		cfg->emmc_config.timing = SD_EMMC_DISABLE;
+		DEV_PTR(emmc)->enabled = 0;
 	}
 
 	update_audio_configuration();

src/mainboard/google/zork/variants/ezkinil/variant.c

@@ -7,13 +7,9 @@
 
 void variant_devtree_update(void)
 {
-	struct soc_amd_picasso_config *cfg;
-
-	cfg = config_of_soc();
-
 	/*
 	 * Enable eMMC if eMMC bit is set in FW_CONFIG or device is unprovisioned.
 	 */
 	if (!(variant_has_emmc() || boot_is_factory_unprovisioned()))
-		cfg->emmc_config.timing = SD_EMMC_DISABLE;
+		DEV_PTR(emmc)->enabled = 0;
 }

src/mainboard/google/zork/variants/morphius/variant.c

@@ -4,13 +4,9 @@
 
 void variant_devtree_update(void)
 {
-	struct soc_amd_picasso_config *cfg;
-
-	cfg = config_of_soc();
-
 	/*
 	 * Enable eMMC if eMMC bit is set in FW_CONFIG or device is unprovisioned.
 	 */
 	if (!(variant_has_emmc() || boot_is_factory_unprovisioned()))
-		cfg->emmc_config.timing = SD_EMMC_DISABLE;
+		DEV_PTR(emmc)->enabled = 0;
 }

src/soc/amd/picasso/Kconfig

@@ -37,6 +37,7 @@ config SOC_AMD_PICASSO
 	select SOC_AMD_COMMON_BLOCK_DATA_FABRIC
 	select SOC_AMD_COMMON_BLOCK_DATA_FABRIC_DOMAIN
 	select SOC_AMD_COMMON_BLOCK_DATA_FABRIC_NP_REGION
+	select SOC_AMD_COMMON_BLOCK_EMMC
 	select SOC_AMD_COMMON_BLOCK_GRAPHICS
 	select SOC_AMD_COMMON_BLOCK_HAS_ESPI
 	select SOC_AMD_COMMON_BLOCK_HDA

src/soc/amd/picasso/acpi/mmio.asl

@@ -87,9 +87,10 @@ Device (MMC0)
 		}
 	}
 
+	Name (STAT, 0x0)
 	Method (_STA, 0x0, NotSerialized)
 	{
-		Return (0x0F)
+		Return (STAT)
 	}
 }
 

src/soc/amd/picasso/chip.h

@@ -177,6 +177,9 @@ struct soc_amd_picasso_config {
 		 *  HS400 -> NONE (0x05)
 		 *
 		 * The kernel driver uses a heuristic to determine if HS400 is supported.
+		 *
+		 * If the eMMC MMIO device is disabled in the devicetree,
+		 * fsps_update_emmc_config will set timing to SD_EMMC_DISABLE.
 		*/
 		enum {
 			SD_EMMC_DISABLE,

src/soc/amd/picasso/chipset.cb

@@ -57,4 +57,5 @@ chip soc/amd/picasso
 	device mmio 0xfedca000 alias uart_1 off ops amd_uart_mmio_ops end
 	device mmio 0xfedce000 alias uart_2 off ops amd_uart_mmio_ops end
 	device mmio 0xfedcf000 alias uart_3 off ops amd_uart_mmio_ops end
+	device mmio 0xfedd5000 alias emmc off ops amd_emmc_mmio_ops end
 end

src/soc/amd/picasso/fsp_s_params.c

@@ -56,6 +56,11 @@ static void fsps_update_emmc_config(FSP_S_CONFIG *scfg,
 		break;
 	}
 
+	/* Make sure that the FSP knows that the EMMC controller should be disabled when the
+	   corresponding MMIO device is disabled */
+	if (!DEV_PTR(emmc)->enabled)
+		val = SD_DISABLE;
+
 	scfg->emmc0_mode = val;
 	scfg->emmc0_sdr104_hs400_driver_strength =
 		cfg->emmc_config.sdr104_hs400_driver_strength;