[tiU21.01 PATCH 0/3] AM62x ESM support
This patch series adds support for AM62x ESM (Error Signaling Modules).
The Error Signaling Module (ESM) aggregates events and errors from throughout the device into one location. It can signal interrupts to a processor to deal with an event, and manipulate an error pin to signal an external hardware that an error has occurred. Therefore an external controller is able to reset the device. Two ESM can be used : one for main domain devices and another one for MCU domain devices. Event outputs generated by main ESM can be routed to MCU ESM as inputs, and trigger MCU ESM generating its event outputs.
Following are required in defconfig: CONFIG_ESM_K3=y CONFIG_SPL_MISC=y CONFIG_SPL_DRIVERS_MISC=y
Julien Panis (3): arm64: dts: k3-am625-r5: Add support for ESM devices arm64: mach-k3: am625_init: Probe ESM nodes configs: am62x_evm_r5: Add support for ESM
arch/arm/dts/k3-am625-r5-sk.dts | 16 +++++++++++++ arch/arm/mach-k3/am625_init.c | 23 +++++++++++++++++++ arch/arm/mach-k3/include/mach/am62_hardware.h | 3 +++ configs/am62x_evm_r5_defconfig | 3 +++ 4 files changed, 45 insertions(+)
Add main ESM and MCU ESM nodes to AM625-R5 device tree.
Signed-off-by: Julien Panis jpanis@baylibre.com --- arch/arm/dts/k3-am625-r5-sk.dts | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/arch/arm/dts/k3-am625-r5-sk.dts b/arch/arm/dts/k3-am625-r5-sk.dts index 2691af40a145..54896937d270 100644 --- a/arch/arm/dts/k3-am625-r5-sk.dts +++ b/arch/arm/dts/k3-am625-r5-sk.dts @@ -78,6 +78,15 @@ ti,secure-host; };
+&cbass_mcu { + mcu_esm: esm@4100000 { + compatible = "ti,j721e-esm"; + reg = <0x0 0x4100000 0x0 0x1000>; + ti,esm-pins = <0>, <1>, <2>, <85>; + u-boot,dm-spl; + }; +}; + &cbass_main { sa3_secproxy: secproxy@44880000 { u-boot,dm-spl; @@ -95,6 +104,13 @@ mbox-names = "tx", "rx", "boot_notify"; u-boot,dm-spl; }; + + main_esm: esm@420000 { + compatible = "ti,j721e-esm"; + reg = <0x0 0x420000 0x0 0x1000>; + ti,esm-pins = <160>, <161>, <162>, <163>, <177>, <178>; + u-boot,dm-spl; + }; };
&mcu_pmx0 {
On AM62x devices, main ESM error event outputs can be routed to MCU ESM as inputs. So, two ESM device nodes are expected in the device tree : one for main ESM and another one for MCU ESM. MCU ESM error output can trigger the reset logic to reset the device when CTRLMMR_MCU_RST_CTRL:MCU_ESM_ERROR_RESET_EN_Z is set to '0'.
Signed-off-by: Julien Panis jpanis@baylibre.com --- arch/arm/mach-k3/am625_init.c | 23 +++++++++++++++++++ arch/arm/mach-k3/include/mach/am62_hardware.h | 3 +++ 2 files changed, 26 insertions(+)
diff --git a/arch/arm/mach-k3/am625_init.c b/arch/arm/mach-k3/am625_init.c index 0d9525992bb0..dfd95b8053b5 100644 --- a/arch/arm/mach-k3/am625_init.c +++ b/arch/arm/mach-k3/am625_init.c @@ -64,6 +64,15 @@ static void ctrl_mmr_unlock(void) mmr_unlock(PADCFG_MMR1_BASE, 1); }
+static __maybe_unused void enable_mcu_esm_reset(void) +{ + /* Set CTRLMMR_MCU_RST_CTRL:MCU_ESM_ERROR_RST_EN_Z to '0' (low active) */ + u32 stat = readl(CTRLMMR_MCU_RST_CTRL); + + stat &= RST_CTRL_ESM_ERROR_RST_EN_Z_MASK; + writel(stat, CTRLMMR_MCU_RST_CTRL); +} + void board_init_f(ulong dummy) { struct udevice *dev; @@ -142,6 +151,20 @@ void board_init_f(ulong dummy) /* Output System Firmware version info */ k3_sysfw_print_ver();
+ if (IS_ENABLED(CONFIG_ESM_K3)) { + /* Probe/configure ESM0 */ + ret = uclass_get_device_by_name(UCLASS_MISC, "esm@420000", &dev); + if (ret) + printf("esm main init failed: %d\n", ret); + + /* Probe/configure MCUESM */ + ret = uclass_get_device_by_name(UCLASS_MISC, "esm@4100000", &dev); + if (ret) + printf("esm mcu init failed: %d\n", ret); + + enable_mcu_esm_reset(); + } + #if defined(CONFIG_K3_AM64_DDRSS) ret = uclass_get_device(UCLASS_RAM, 0, &dev); if (ret) diff --git a/arch/arm/mach-k3/include/mach/am62_hardware.h b/arch/arm/mach-k3/include/mach/am62_hardware.h index cfabd20cbd79..9118d052042a 100644 --- a/arch/arm/mach-k3/include/mach/am62_hardware.h +++ b/arch/arm/mach-k3/include/mach/am62_hardware.h @@ -29,6 +29,7 @@ #define MAIN_DEVSTAT_BACKUP_BOOTMODE_SHIFT 10 #define MAIN_DEVSTAT_BACKUP_BOOTMODE_CFG_MASK BIT(13) #define MAIN_DEVSTAT_BACKUP_BOOTMODE_CFG_SHIFT 13 +#define RST_CTRL_ESM_ERROR_RST_EN_Z_MASK (~BIT(17))
/* Primary Bootmode MMC Config macros */ #define MAIN_DEVSTAT_PRIMARY_MMC_PORT_MASK 0x4 @@ -67,6 +68,8 @@ #define MCU_CTRL_DEVICE_CLKOUT_32K_CTRL (MCU_CTRL_MMR0_BASE + 0x8058) #define MCU_CTRL_DEVICE_CLKOUT_LFOSC_SELECT_VAL (0x3)
+#define CTRLMMR_MCU_RST_CTRL (MCU_CTRL_MMR0_BASE + 0x18170) + #define ROM_ENTENDED_BOOT_DATA_INFO 0x43c3f1e0
/* Use Last 2K as Scratch pad */
Enable ESM driver for AM62x in R5 SPL/u-boot build.
Signed-off-by: Julien Panis jpanis@baylibre.com --- configs/am62x_evm_r5_defconfig | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/configs/am62x_evm_r5_defconfig b/configs/am62x_evm_r5_defconfig index 2e340cd6f416..64cd4a4acd09 100644 --- a/configs/am62x_evm_r5_defconfig +++ b/configs/am62x_evm_r5_defconfig @@ -96,3 +96,6 @@ CONFIG_SPL_TIMER=y CONFIG_OMAP_TIMER=y CONFIG_LIB_RATIONAL=y CONFIG_SPL_LIB_RATIONAL=y +CONFIG_ESM_K3=y +CONFIG_SPL_MISC=y +CONFIG_SPL_DRIVERS_MISC=y
participants (1)
-
Julien Panis