Enable Atmel sama5d3xek boart spl boot support, which can load u-boot from SD card with FAT file system.
Signed-off-by: Bo Shen voice.shen@atmel.com
--- Changes in v4: - Add comments to DDR refresh timing register.
Changes in v3: - Move plla and mck configure to spl.c file
Changes in v2: - Move spl related code to at91-common folder
arch/arm/cpu/armv7/Makefile | 2 +- arch/arm/cpu/at91-common/Makefile | 2 +- arch/arm/cpu/at91-common/spl.c | 90 ++++++++++++++++++++++++++ arch/arm/cpu/at91-common/u-boot-spl.lds | 50 ++++++++++++++ arch/arm/include/asm/arch-at91/at91_common.h | 4 ++ arch/arm/include/asm/arch-at91/spl.h | 20 ++++++ board/atmel/sama5d3xek/sama5d3xek.c | 85 ++++++++++++++++++++++++ include/configs/sama5d3xek.h | 34 ++++++++++ 8 files changed, 285 insertions(+), 2 deletions(-) create mode 100644 arch/arm/cpu/at91-common/spl.c create mode 100644 arch/arm/cpu/at91-common/u-boot-spl.lds create mode 100644 arch/arm/include/asm/arch-at91/spl.h
diff --git a/arch/arm/cpu/armv7/Makefile b/arch/arm/cpu/armv7/Makefile index d3347b3..0467d00 100644 --- a/arch/arm/cpu/armv7/Makefile +++ b/arch/arm/cpu/armv7/Makefile @@ -12,7 +12,7 @@ obj-y += cache_v7.o obj-y += cpu.o obj-y += syslib.o
-ifneq ($(CONFIG_AM43XX)$(CONFIG_AM33XX)$(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX)$(CONFIG_TEGRA)$(CONFIG_MX6)$(CONFIG_TI81XX),) +ifneq ($(CONFIG_AM43XX)$(CONFIG_AM33XX)$(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX)$(CONFIG_TEGRA)$(CONFIG_MX6)$(CONFIG_TI81XX)$(CONFIG_AT91FAMILY),) ifneq ($(CONFIG_SKIP_LOWLEVEL_INIT),y) obj-y += lowlevel_init.o endif diff --git a/arch/arm/cpu/at91-common/Makefile b/arch/arm/cpu/at91-common/Makefile index 671a05e..d97053f 100644 --- a/arch/arm/cpu/at91-common/Makefile +++ b/arch/arm/cpu/at91-common/Makefile @@ -8,4 +8,4 @@ # SPDX-License-Identifier: GPL-2.0+ #
-obj-$(CONFIG_SPL_BUILD) += mpddrc.o +obj-$(CONFIG_SPL_BUILD) += mpddrc.o spl.o diff --git a/arch/arm/cpu/at91-common/spl.c b/arch/arm/cpu/at91-common/spl.c new file mode 100644 index 0000000..37c0cc4 --- /dev/null +++ b/arch/arm/cpu/at91-common/spl.c @@ -0,0 +1,90 @@ +/* + * Copyright (C) 2013 Atmel Corporation + * Bo Shen voice.shen@atmel.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/at91_common.h> +#include <asm/arch/at91_pmc.h> +#include <asm/arch/at91_wdt.h> +#include <asm/arch/clk.h> +#include <spl.h> + +static void at91_disable_wdt(void) +{ + struct at91_wdt *wdt = (struct at91_wdt *)ATMEL_BASE_WDT; + + writel(AT91_WDT_MR_WDDIS, &wdt->mr); +} + +void at91_plla_init(u32 pllar) +{ + struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; + + writel(pllar, &pmc->pllar); + while (!(readl(&pmc->sr) & (AT91_PMC_LOCKA | AT91_PMC_MCKRDY))) + ; +} + +void at91_mck_init(u32 mckr) +{ + struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; + u32 tmp; + + tmp = readl(&pmc->mckr); + tmp &= ~(AT91_PMC_MCKR_PRES_MASK | + AT91_PMC_MCKR_MDIV_MASK | + AT91_PMC_MCKR_PLLADIV_2); + tmp |= mckr & (AT91_PMC_MCKR_PRES_MASK | + AT91_PMC_MCKR_MDIV_MASK | + AT91_PMC_MCKR_PLLADIV_2); + writel(tmp, &pmc->mckr); + + while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY)) + ; +} + + +u32 spl_boot_device(void) +{ +#ifdef CONFIG_SYS_USE_MMC + return BOOT_DEVICE_MMC1; +#endif + return BOOT_DEVICE_NONE; +} + +u32 spl_boot_mode(void) +{ + switch (spl_boot_device()) { +#ifdef CONFIG_SYS_USE_MMC + case BOOT_DEVICE_MMC1: + return MMCSD_MODE_FAT; + break; +#endif + case BOOT_DEVICE_NONE: + default: + hang(); + } +} + +void s_init(void) +{ + /* disable watchdog */ + at91_disable_wdt(); + + /* PMC configuration */ + at91_pmc_init(); + + at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK); + + timer_init(); + + board_early_init_f(); + + preloader_console_init(); + + mem_init(); +} diff --git a/arch/arm/cpu/at91-common/u-boot-spl.lds b/arch/arm/cpu/at91-common/u-boot-spl.lds new file mode 100644 index 0000000..038335d --- /dev/null +++ b/arch/arm/cpu/at91-common/u-boot-spl.lds @@ -0,0 +1,50 @@ +/* + * (C) Copyright 2002 + * Gary Jennejohn, DENX Software Engineering, garyj@denx.de + * + * (C) Copyright 2010 + * Texas Instruments, <www.ti.com> + * Aneesh V aneesh@ti.com + * + * (C) 2013 Atmel Corporation + * Bo Shen voice.shen@atmel.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +MEMORY { .sram : ORIGIN = CONFIG_SPL_TEXT_BASE, \ + LENGTH = CONFIG_SPL_MAX_SIZE } +MEMORY { .sdram : ORIGIN = CONFIG_SPL_BSS_START_ADDR, \ + LENGTH = CONFIG_SPL_BSS_MAX_SIZE } + +OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm") +OUTPUT_ARCH(arm) +ENTRY(_start) +SECTIONS +{ + .text : + { + __start = .; + arch/arm/cpu/armv7/start.o (.text*) + *(.text*) + } >.sram + + . = ALIGN(4); + .rodata : { *(SORT_BY_ALIGNMENT(.rodata*)) } >.sram + + . = ALIGN(4); + .data : { *(SORT_BY_ALIGNMENT(.data*)) } >.sram + + . = ALIGN(4); + __image_copy_end = .; + _end = .; + + .bss : + { + . = ALIGN(4); + __bss_start = .; + *(.bss*) + . = ALIGN(4); + __bss_end = .; + } >.sdram +} diff --git a/arch/arm/include/asm/arch-at91/at91_common.h b/arch/arm/include/asm/arch-at91/at91_common.h index abcb97d..3ca4d5b 100644 --- a/arch/arm/include/asm/arch-at91/at91_common.h +++ b/arch/arm/include/asm/arch-at91/at91_common.h @@ -22,5 +22,9 @@ void at91_spi1_hw_init(unsigned long cs_mask); void at91_udp_hw_init(void); void at91_uhp_hw_init(void); void at91_lcd_hw_init(void); +void at91_plla_init(u32 pllar); +void at91_mck_init(u32 mckr); +void at91_pmc_init(void); +void mem_init(void);
#endif /* AT91_COMMON_H */ diff --git a/arch/arm/include/asm/arch-at91/spl.h b/arch/arm/include/asm/arch-at91/spl.h new file mode 100644 index 0000000..68c5349 --- /dev/null +++ b/arch/arm/include/asm/arch-at91/spl.h @@ -0,0 +1,20 @@ +/* + * Copyright (C) 2013 Atmel Corporation + * Bo Shen voice.shen@atmel.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _ASM_ARCH_SPL_H_ +#define _ASM_ARCH_SPL_H_ + +enum { + BOOT_DEVICE_NONE, +#ifdef CONFIG_SYS_USE_MMC + BOOT_DEVICE_MMC1, + BOOT_DEVICE_MMC2, + BOOT_DEVICE_MMC2_2, +#endif +}; + +#endif diff --git a/board/atmel/sama5d3xek/sama5d3xek.c b/board/atmel/sama5d3xek/sama5d3xek.c index f245f98..0ab8020 100644 --- a/board/atmel/sama5d3xek/sama5d3xek.c +++ b/board/atmel/sama5d3xek/sama5d3xek.c @@ -20,6 +20,9 @@ #include <micrel.h> #include <net.h> #include <netdev.h> +#include <spl.h> +#include <asm/arch/atmel_mpddrc.h> +#include <asm/arch/at91_wdt.h>
#ifdef CONFIG_USB_GADGET_ATMEL_USBA #include <asm/arch/atmel_usba_udc.h> @@ -296,3 +299,85 @@ void spi_cs_deactivate(struct spi_slave *slave) } } #endif /* CONFIG_ATMEL_SPI */ + +/* SPL */ +#ifdef CONFIG_SPL_BUILD +void spl_board_init(void) +{ +#ifdef CONFIG_SYS_USE_MMC + sama5d3xek_mci_hw_init(); +#endif +} + +static void ddr2_conf(struct atmel_mpddr *ddr2) +{ + ddr2->md = (ATMEL_MPDDRC_MD_DBW_32_BITS | ATMEL_MPDDRC_MD_DDR2_SDRAM); + + ddr2->cr = (ATMEL_MPDDRC_CR_NC_COL_10 | + ATMEL_MPDDRC_CR_NR_ROW_14 | + ATMEL_MPDDRC_CR_CAS_DDR_CAS3 | + ATMEL_MPDDRC_CR_ENRDM_ON | + ATMEL_MPDDRC_CR_NB_8BANKS | + ATMEL_MPDDRC_CR_NDQS_DISABLED | + ATMEL_MPDDRC_CR_DECOD_INTERLEAVED | + ATMEL_MPDDRC_CR_UNAL_SUPPORTED); + /* + * As the DDR2-SDRAm device requires a refresh time is 7.8125us + * when DDR run at 133MHz, so it needs (7.8125us * 133MHz / 10^9) clocks + */ + ddr2->rtr = 0x411; + + ddr2->tpr0 = (6 << ATMEL_MPDDRC_TPR0_TRAS_OFFSET | + 2 << ATMEL_MPDDRC_TPR0_TRCD_OFFSET | + 2 << ATMEL_MPDDRC_TPR0_TWR_OFFSET | + 8 << ATMEL_MPDDRC_TPR0_TRC_OFFSET | + 2 << ATMEL_MPDDRC_TPR0_TRP_OFFSET | + 2 << ATMEL_MPDDRC_TPR0_TRRD_OFFSET | + 2 << ATMEL_MPDDRC_TPR0_TWTR_OFFSET | + 2 << ATMEL_MPDDRC_TPR0_TMRD_OFFSET); + + ddr2->tpr1 = (2 << ATMEL_MPDDRC_TPR1_TXP_OFFSET | + 200 << ATMEL_MPDDRC_TPR1_TXSRD_OFFSET | + 28 << ATMEL_MPDDRC_TPR1_TXSNR_OFFSET | + 26 << ATMEL_MPDDRC_TPR1_TRFC_OFFSET); + + ddr2->tpr2 = (7 << ATMEL_MPDDRC_TPR2_TFAW_OFFSET | + 2 << ATMEL_MPDDRC_TPR2_TRTP_OFFSET | + 2 << ATMEL_MPDDRC_TPR2_TRPA_OFFSET | + 7 << ATMEL_MPDDRC_TPR2_TXARDS_OFFSET | + 8 << ATMEL_MPDDRC_TPR2_TXARD_OFFSET); +} + +void mem_init(void) +{ + struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; + struct atmel_mpddr ddr2; + + ddr2_conf(&ddr2); + + /* enable MPDDR clock */ + at91_periph_clk_enable(ATMEL_ID_MPDDRC); + writel(0x4, &pmc->scer); + + /* DDRAM2 Controller initialize */ + ddr2_init(ATMEL_BASE_DDRCS, &ddr2); +} + +void at91_pmc_init(void) +{ + struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; + u32 tmp; + + tmp = AT91_PMC_PLLAR_29 | + AT91_PMC_PLLXR_PLLCOUNT(0x3f) | + AT91_PMC_PLLXR_MUL(43) | + AT91_PMC_PLLXR_DIV(1); + at91_plla_init(tmp); + + writel(0x3 << 8, &pmc->pllicpr); + + tmp = AT91_PMC_MCKR_MDIV_4 | + AT91_PMC_MCKR_CSS_PLLA; + at91_mck_init(tmp); +} +#endif diff --git a/include/configs/sama5d3xek.h b/include/configs/sama5d3xek.h index 5a6f0fc..c34feb5 100644 --- a/include/configs/sama5d3xek.h +++ b/include/configs/sama5d3xek.h @@ -24,7 +24,10 @@ #define CONFIG_AT91FAMILY #define CONFIG_ARCH_CPU_INIT
+#ifndef CONFIG_SPL_BUILD #define CONFIG_SKIP_LOWLEVEL_INIT +#endif + #define CONFIG_BOARD_EARLY_INIT_F #define CONFIG_DISPLAY_CPUINFO
@@ -93,8 +96,12 @@ #define CONFIG_SYS_SDRAM_BASE ATMEL_BASE_DDRCS #define CONFIG_SYS_SDRAM_SIZE 0x20000000
+#ifdef CONFIG_SPL_BUILD +#define CONFIG_SYS_INIT_SP_ADDR 0x310000 +#else #define CONFIG_SYS_INIT_SP_ADDR \ (CONFIG_SYS_SDRAM_BASE + 4 * 1024 - GENERATED_GBL_DATA_SIZE) +#endif
/* SerialFlash */ #define CONFIG_CMD_SF @@ -235,4 +242,31 @@ /* Size of malloc() pool */ #define CONFIG_SYS_MALLOC_LEN (1024 * 1024)
+/* SPL */ +#define CONFIG_SPL +#define CONFIG_SPL_FRAMEWORK +#define CONFIG_SPL_TEXT_BASE 0x300000 +#define CONFIG_SPL_MAX_SIZE 0x10000 +#define CONFIG_SPL_BSS_START_ADDR 0x20000000 +#define CONFIG_SPL_BSS_MAX_SIZE 0x80000 +#define CONFIG_SYS_SPL_MALLOC_START 0x20080000 +#define CONFIG_SYS_SPL_MALLOC_SIZE 0x80000 + +#define CONFIG_SPL_LIBCOMMON_SUPPORT +#define CONFIG_SPL_LIBGENERIC_SUPPORT +#define CONFIG_SPL_GPIO_SUPPORT +#define CONFIG_SPL_SERIAL_SUPPORT + +#define CONFIG_SPL_BOARD_INIT +#ifdef CONFIG_SYS_USE_MMC +#define CONFIG_SPL_LDSCRIPT arch/arm/cpu/at91-common/u-boot-spl.lds +#define CONFIG_SPL_MMC_SUPPORT +#define CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS 0x400 +#define CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR 0x200 +#define CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION 1 +#define CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME "u-boot.img" +#define CONFIG_SPL_FAT_SUPPORT +#define CONFIG_SPL_LIBDISK_SUPPORT +#endif + #endif