This patch adds support for EMMC booting on SMDK5250.
Signed-off-by: Amar <amarendra...@samsung.com>
---
board/samsung/smdk5250/clock_init.c | 18 +++++++++++++
board/samsung/smdk5250/clock_init.h | 5 ++++
board/samsung/smdk5250/spl_boot.c | 52 ++++++++++++++++++++++++++++++++-----
3 files changed, 69 insertions(+), 6 deletions(-)
diff --git a/board/samsung/smdk5250/clock_init.c
b/board/samsung/smdk5250/clock_init.c
index c009ae5..90d2199 100644
--- a/board/samsung/smdk5250/clock_init.c
+++ b/board/samsung/smdk5250/clock_init.c
@@ -28,6 +28,7 @@
#include <asm/arch/clk.h>
#include <asm/arch/clock.h>
#include <asm/arch/spl.h>
+#include <asm/arch/dwmmc.h>
#include "clock_init.h"
#include "setup.h"
@@ -664,3 +665,20 @@ void clock_init_dp_clock(void)
/* We run DP at 267 Mhz */
setbits_le32(&clk->div_disp1_0, CLK_DIV_DISP1_0_FIMD1);
}
+
+/*
+ * Set clock divisor value for booting from emmc.
+ * Set DWMMC channel-0 clk div to operate mmc0 device at 50MHz.
+ */
+void emmc_boot_clk_div_set(void)
+{
+ struct exynos5_clock *clk = (struct exynos5_clock *)EXYNOS5_CLOCK_BASE;
+ unsigned int addr;
+ unsigned int div_mmc;
+
+ addr = (unsigned int) &clk->div_fsys1;
+
+ div_mmc = readl(addr) & ~FSYS1_MMC0_DIV_MASK;
+ div_mmc |= FSYS1_MMC0_DIV_VAL;
+ writel(div_mmc, addr);
+}
diff --git a/board/samsung/smdk5250/clock_init.h
b/board/samsung/smdk5250/clock_init.h
index f751bcb..9b156f7 100644
--- a/board/samsung/smdk5250/clock_init.h
+++ b/board/samsung/smdk5250/clock_init.h
@@ -146,4 +146,9 @@ struct mem_timings *clock_get_mem_timings(void);
* Initialize clock for the device
*/
void system_clock_init(void);
+
+/*
+ * Set clock divisor value for booting from emmc.
+ */
+void emmc_boot_clk_div_set(void);
#endif
diff --git a/board/samsung/smdk5250/spl_boot.c
b/board/samsung/smdk5250/spl_boot.c
index d8f3c1e..e94677b 100644
--- a/board/samsung/smdk5250/spl_boot.c
+++ b/board/samsung/smdk5250/spl_boot.c
@@ -23,16 +23,41 @@
#include<common.h>
#include<config.h>
+#include <asm/arch-exynos/dmc.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/clk.h>
+
+#include "clock_init.h"
+
+/* Index into irom ptr table */
+enum index {
+ MMC_INDEX,
+ EMMC44_INDEX,
+ EMMC44_END_INDEX,
+ SPI_INDEX,
+};
+
+/* IROM Function Pointers Table */
+void (*irom_ptr_table[])(void) = {
+ [MMC_INDEX] = (void *)0x02020030, /* iROM Function Pointer
+ -SDMMC boot */
+ [EMMC44_INDEX] = (void *)0x02020044, /* iROM Function Pointer
+ -EMMC 4.4 boot */
+ [EMMC44_END_INDEX] = (void *)0x02020048,/* iROM Function Pointer
+ -EMMC 4.4 end boot opration */
+ [SPI_INDEX] = (void *)0x02020058, /* iROM Function Pointer
+ -SPI boot */
+ };
+
enum boot_mode {
BOOT_MODE_MMC = 4,
BOOT_MODE_SERIAL = 20,
+ BOOT_MODE_EMMC = 8, /* EMMC4.4 */
/* Boot based on Operating Mode pin settings */
BOOT_MODE_OM = 32,
BOOT_MODE_USB, /* Boot using USB download */
};
- typedef u32 (*spi_copy_func_t)(u32 offset, u32 nblock, u32 dst);
-
/*
* Copy U-boot from mmc to RAM:
* COPY_BL2_FNPTR_ADDR: Address in iRAM, which Contains
@@ -40,23 +65,38 @@ enum boot_mode {
*/
void copy_uboot_to_ram(void)
{
- spi_copy_func_t spi_copy;
enum boot_mode bootmode;
- u32 (*copy_bl2)(u32, u32, u32);
+ u32 (*spi_copy)(u32 offset, u32 nblock, u32 dst);
+ u32 (*copy_bl2)(u32 offset, u32 nblock, u32 dst);
+ u32 (*copy_bl2_from_emmc)(u32 nblock, u32 dst);
+ void (*end_bootop_from_emmc)(void);
bootmode = readl(EXYNOS5_POWER_BASE) & OM_STAT;
switch (bootmode) {
case BOOT_MODE_SERIAL:
- spi_copy = *(spi_copy_func_t *)EXYNOS_COPY_SPI_FNPTR_ADDR;
+ spi_copy = (void *) *(u32 *)irom_ptr_table[SPI_INDEX];
spi_copy(SPI_FLASH_UBOOT_POS, CONFIG_BL2_SIZE,
CONFIG_SYS_TEXT_BASE);
break;
case BOOT_MODE_MMC:
- copy_bl2 = (void *) *(u32 *)COPY_BL2_FNPTR_ADDR;
+ copy_bl2 = (void *) *(u32 *)irom_ptr_table[MMC_INDEX];
copy_bl2(BL2_START_OFFSET, BL2_SIZE_BLOC_COUNT,
CONFIG_SYS_TEXT_BASE);
break;
+ case BOOT_MODE_EMMC:
+ emmc_boot_clk_div_set();
+
+ copy_bl2_from_emmc =
+ (void *) *(u32 *)irom_ptr_table[EMMC44_INDEX];
+ end_bootop_from_emmc =
+ (void *) *(u32 *)irom_ptr_table[EMMC44_END_INDEX];
+
+ copy_bl2_from_emmc(BL2_SIZE_BLOC_COUNT, CONFIG_SYS_TEXT_BASE);
+ end_bootop_from_emmc();
+
+ break;
+
default:
break;
}
--
1.8.0
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