After wakeup from deep sleep, Clear EPU registers as early as possible to prevent from possible issue. It's also safe to clear at normal boot.
Signed-off-by: Chenhui Zhao chenhui.zhao@freescale.com --- arch/arm/cpu/armv7/ls102xa/Makefile | 1 + arch/arm/cpu/armv7/ls102xa/cpu.c | 16 +++++++ arch/arm/cpu/armv7/ls102xa/fsl_epu.c | 57 +++++++++++++++++++++++ arch/arm/cpu/armv7/ls102xa/fsl_epu.h | 68 ++++++++++++++++++++++++++++ arch/arm/include/asm/arch-ls102xa/config.h | 1 + 5 files changed, 143 insertions(+), 0 deletions(-) create mode 100644 arch/arm/cpu/armv7/ls102xa/fsl_epu.c create mode 100644 arch/arm/cpu/armv7/ls102xa/fsl_epu.h
diff --git a/arch/arm/cpu/armv7/ls102xa/Makefile b/arch/arm/cpu/armv7/ls102xa/Makefile index d82ce8d..ae4f25d 100644 --- a/arch/arm/cpu/armv7/ls102xa/Makefile +++ b/arch/arm/cpu/armv7/ls102xa/Makefile @@ -7,6 +7,7 @@ obj-y += cpu.o obj-y += clock.o obj-y += timer.o +obj-y += fsl_epu.o
obj-$(CONFIG_OF_LIBFDT) += fdt.o obj-$(CONFIG_SYS_HAS_SERDES) += fsl_ls1_serdes.o ls102xa_serdes.o diff --git a/arch/arm/cpu/armv7/ls102xa/cpu.c b/arch/arm/cpu/armv7/ls102xa/cpu.c index b7dde45..fae6c68 100644 --- a/arch/arm/cpu/armv7/ls102xa/cpu.c +++ b/arch/arm/cpu/armv7/ls102xa/cpu.c @@ -12,6 +12,8 @@ #include <netdev.h> #include <fsl_esdhc.h>
+#include "fsl_epu.h" + DECLARE_GLOBAL_DATA_PTR;
#if defined(CONFIG_DISPLAY_CPUINFO) @@ -101,3 +103,17 @@ int cpu_eth_init(bd_t *bis)
return 0; } + +int arch_cpu_init(void) +{ + void *epu_base = (void *)(CONFIG_SYS_DCSRBAR + EPU_BLOCK_OFFSET); + + /* + * After wakeup from deep sleep, Clear EPU registers + * as early as possible to prevent from possible issue. + * It's also safe to clear at normal boot. + */ + fsl_epu_clean(epu_base); + + return 0; +} diff --git a/arch/arm/cpu/armv7/ls102xa/fsl_epu.c b/arch/arm/cpu/armv7/ls102xa/fsl_epu.c new file mode 100644 index 0000000..6212640 --- /dev/null +++ b/arch/arm/cpu/armv7/ls102xa/fsl_epu.c @@ -0,0 +1,57 @@ +/* + * Copyright 2014 Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> + +#include "fsl_epu.h" + +/** + * fsl_epu_clean - Clear EPU registers + */ +void fsl_epu_clean(void *epu_base) +{ + u32 offset; + + /* follow the exact sequence to clear the registers */ + /* Clear EPACRn */ + for (offset = EPACR0; offset <= EPACR15; offset += EPACR_STRIDE) + out_be32(epu_base + offset, 0); + + /* Clear EPEVTCRn */ + for (offset = EPEVTCR0; offset <= EPEVTCR9; offset += EPEVTCR_STRIDE) + out_be32(epu_base + offset, 0); + + /* Clear EPGCR */ + out_be32(epu_base + EPGCR, 0); + + /* Clear EPSMCRn */ + for (offset = EPSMCR0; offset <= EPSMCR15; offset += EPSMCR_STRIDE) + out_be32(epu_base + offset, 0); + + /* Clear EPCCRn */ + for (offset = EPCCR0; offset <= EPCCR31; offset += EPCCR_STRIDE) + out_be32(epu_base + offset, 0); + + /* Clear EPCMPRn */ + for (offset = EPCMPR0; offset <= EPCMPR31; offset += EPCMPR_STRIDE) + out_be32(epu_base + offset, 0); + + /* Clear EPCTRn */ + for (offset = EPCTR0; offset <= EPCTR31; offset += EPCTR_STRIDE) + out_be32(epu_base + offset, 0); + + /* Clear EPIMCRn */ + for (offset = EPIMCR0; offset <= EPIMCR31; offset += EPIMCR_STRIDE) + out_be32(epu_base + offset, 0); + + /* Clear EPXTRIGCRn */ + out_be32(epu_base + EPXTRIGCR, 0); + + /* Clear EPECRn */ + for (offset = EPECR0; offset <= EPECR15; offset += EPECR_STRIDE) + out_be32(epu_base + offset, 0); +} diff --git a/arch/arm/cpu/armv7/ls102xa/fsl_epu.h b/arch/arm/cpu/armv7/ls102xa/fsl_epu.h new file mode 100644 index 0000000..d658aad --- /dev/null +++ b/arch/arm/cpu/armv7/ls102xa/fsl_epu.h @@ -0,0 +1,68 @@ +/* + * Copyright 2014 Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __FSL_EPU_H +#define __FSL_EPU_H + +#include <asm/types.h> + +#define FSL_STRIDE_4B 4 +#define FSL_STRIDE_8B 8 + +/* Block offsets */ +#define EPU_BLOCK_OFFSET 0x00000000 + +/* EPGCR (Event Processor Global Control Register) */ +#define EPGCR 0x000 + +/* EPEVTCR0-9 (Event Processor EVT Pin Control Registers) */ +#define EPEVTCR0 0x050 +#define EPEVTCR9 0x074 +#define EPEVTCR_STRIDE FSL_STRIDE_4B + +/* EPXTRIGCR (Event Processor Crosstrigger Control Register) */ +#define EPXTRIGCR 0x090 + +/* EPIMCR0-31 (Event Processor Input Mux Control Registers) */ +#define EPIMCR0 0x100 +#define EPIMCR31 0x17C +#define EPIMCR_STRIDE FSL_STRIDE_4B + +/* EPSMCR0-15 (Event Processor SCU Mux Control Registers) */ +#define EPSMCR0 0x200 +#define EPSMCR15 0x278 +#define EPSMCR_STRIDE FSL_STRIDE_8B + +/* EPECR0-15 (Event Processor Event Control Registers) */ +#define EPECR0 0x300 +#define EPECR15 0x33C +#define EPECR_STRIDE FSL_STRIDE_4B + +/* EPACR0-15 (Event Processor Action Control Registers) */ +#define EPACR0 0x400 +#define EPACR15 0x43C +#define EPACR_STRIDE FSL_STRIDE_4B + +/* EPCCRi0-15 (Event Processor Counter Control Registers) */ +#define EPCCR0 0x800 +#define EPCCR15 0x83C +#define EPCCR31 0x87C +#define EPCCR_STRIDE FSL_STRIDE_4B + +/* EPCMPR0-15 (Event Processor Counter Compare Registers) */ +#define EPCMPR0 0x900 +#define EPCMPR15 0x93C +#define EPCMPR31 0x97C +#define EPCMPR_STRIDE FSL_STRIDE_4B + +/* EPCTR0-31 (Event Processor Counter Register) */ +#define EPCTR0 0xA00 +#define EPCTR31 0xA7C +#define EPCTR_STRIDE FSL_STRIDE_4B + +void fsl_epu_clean(void *epu_base); + +#endif diff --git a/arch/arm/include/asm/arch-ls102xa/config.h b/arch/arm/include/asm/arch-ls102xa/config.h index f2c9687..6fff74c 100644 --- a/arch/arm/include/asm/arch-ls102xa/config.h +++ b/arch/arm/include/asm/arch-ls102xa/config.h @@ -13,6 +13,7 @@ #define OCRAM_SIZE 0x00020000
#define CONFIG_SYS_IMMR 0x01000000 +#define CONFIG_SYS_DCSRBAR 0x20000000
#define CONFIG_SYS_FSL_DDR_ADDR (CONFIG_SYS_IMMR + 0x00080000) #define CONFIG_SYS_CCI400_ADDR (CONFIG_SYS_IMMR + 0x00180000)