[U-Boot] [PATCH v3 6/6] arm: atmel: sama5d3: spl boot from fat fs SD card

Bo Shen
2013-11-06T05:29:17Z

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 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 | 1 +
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 | 82 +++++++++++++++++++++++
include/configs/sama5d3xek.h | 34 ++++++++++
8 files changed, 282 insertions(+), 1 deletion(-)
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 ee4b021..aea4e8b 100644
--- a/arch/arm/cpu/armv7/Makefile
+++ b/arch/arm/cpu/armv7/Makefile
@@ -16,7 +16,7 @@ COBJS += cache_v7.o
COBJS += cpu.o
COBJS += 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),)
SOBJS += lowlevel_init.o
endif

diff --git a/arch/arm/cpu/at91-common/Makefile b/arch/arm/cpu/at91-common/Makefile
index 6f1a9e6..4377a0b 100644
--- a/arch/arm/cpu/at91-common/Makefile
+++ b/arch/arm/cpu/at91-common/Makefile
@@ -13,6 +13,7 @@ include $(TOPDIR)/config.mk
LIB = $(obj)libat91-common.o

COBJS-$(CONFIG_SPL_BUILD) += mpddrc.o
+COBJS-$(CONFIG_SPL_BUILD) += spl.o

SRCS := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))
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..846a1b8 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 +299,82 @@ 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
+}
+
+void ddr2_conf(struct atmel_mpddr *ddr2)
+{
+ ddr2->mdr = (ATMEL_MPDDRC_MDR_DBW_32BITS | ATMEL_MPDDRC_MDR_DDR2_SDRAM);
+
+ ddr2->cr = (ATMEL_MPDDRC_CR_NC_COL_10 |
+ ATMEL_MPDDRC_CR_NR_ROW_14 |
+ ATMEL_MPDDRC_CR_CAS_3 |
+ ATMEL_MPDDRC_CR_EN_ENRDM |
+ ATMEL_MPDDRC_CR_NB_8BANKS |
+ ATMEL_MPDDRC_CR_DIS_NDQS |
+ ATMEL_MPDDRC_CR_DECOD_INTERLEAVED |
+ ATMEL_MPDDRC_CR_UNAL_SUPPORTED);
+
+ ddr2->rtr = 0x411;
+
+ ddr2->tp0r = (6 << ATMEL_MPDDRC_TP0R_TRAS_OFFSET |
+ 2 << ATMEL_MPDDRC_TP0R_TRCD_OFFSET |
+ 2 << ATMEL_MPDDRC_TP0R_TWR_OFFSET |
+ 8 << ATMEL_MPDDRC_TP0R_TRC_OFFSET |
+ 2 << ATMEL_MPDDRC_TP0R_TRP_OFFSET |
+ 2 << ATMEL_MPDDRC_TP0R_TRRD_OFFSET |
+ 2 << ATMEL_MPDDRC_TP0R_TWTR_OFFSET |
+ 2 << ATMEL_MPDDRC_TP0R_TMRD_OFFSET);
+
+ ddr2->tp1r = (2 << ATMEL_MPDDRC_TP1R_TXP_OFFSET |
+ 200 << ATMEL_MPDDRC_TP1R_TXSRD_OFFSET |
+ 28 << ATMEL_MPDDRC_TP1R_TXSNR_OFFSET |
+ 26 << ATMEL_MPDDRC_TP1R_TRFC_OFFSET);
+
+ ddr2->tp2r = (7 << ATMEL_MPDDRC_TP2R_TFAW_OFFSET |
+ 2 << ATMEL_MPDDRC_TP2R_TRTP_OFFSET |
+ 2 << ATMEL_MPDDRC_TP2R_TRPA_OFFSET |
+ 7 << ATMEL_MPDDRC_TP2R_TXARDS_OFFSET |
+ 8 << ATMEL_MPDDRC_TP2R_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 79c0068..9c80e82 100644
--- a/include/configs/sama5d3xek.h
+++ b/include/configs/sama5d3xek.h
@@ -25,7 +25,10 @@
#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

@@ -94,8 +97,12 @@
#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
--
1.7.9.5