This patch adds support for EMMC booting on SMDK5250.
Signed-off-by: Amar <amarendra...@samsung.com>
---
Changes since V1:
1)Updated spl_boot.c file to maintain irom pointer table
instead of using the #define values defined in header file.
Changes since V2:
1)Updation of commit message and resubmition of proper patch set.
Changes since V3:
No change.
Changes since V4:
1)The function get_irom_func(int index) has been added to avoid
type casting at many places.
2)The changes to file arch/arm/include/asm/arch-exynos/clk.h are
included in this patch file.
Changes since V5:
No change.
Changes since V6:
No change.
Changes since V7:
1)The macros FSYS1_MMC0_DIV_MASK and FSYS1_MMC0_DIV_VAL are made
local to file clock_init.c.
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 5b9e82f..b288e66 100644
--- a/board/samsung/smdk5250/clock_init.c
+++ b/board/samsung/smdk5250/clock_init.c
@@ -28,10 +28,14 @@
#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"
+#define FSYS1_MMC0_DIV_MASK 0xff0f
+#define FSYS1_MMC0_DIV_VAL 0x0701
+
DECLARE_GLOBAL_DATA_PTR;
struct arm_clk_ratios arm_clk_ratios[] = {
@@ -664,3 +668,17 @@ 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 div_mmc;
+
+ div_mmc = readl((unsigned int) &clk->div_fsys1) & ~FSYS1_MMC0_DIV_MASK;
+ div_mmc |= FSYS1_MMC0_DIV_VAL;
+ writel(div_mmc, (unsigned int) &clk->div_fsys1);
+}
diff --git a/board/samsung/smdk5250/clock_init.h
b/board/samsung/smdk5250/clock_init.h
index f751bcb..20a1d47 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..fa2c0b2 100644
--- a/board/samsung/smdk5250/spl_boot.c
+++ b/board/samsung/smdk5250/spl_boot.c
@@ -23,15 +23,42 @@
#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 */
+u32 irom_ptr_table[] = {
+ [MMC_INDEX] = 0x02020030, /* iROM Function Pointer-SDMMC boot */
+ [EMMC44_INDEX] = 0x02020044, /* iROM Function Pointer-EMMC4.4 boot*/
+ [EMMC44_END_INDEX] = 0x02020048,/* iROM Function Pointer
+ -EMMC4.4 end boot operation */
+ [SPI_INDEX] = 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);
+void *get_irom_func(int index)
+{
+ return (void *)*(u32 *)irom_ptr_table[index];
+}
/*
* Copy U-boot from mmc to RAM:
@@ -40,23 +67,36 @@ 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);
+ /* read Operation Mode ststus register to find the bootmode */
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 = get_irom_func(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 = get_irom_func(MMC_INDEX);
copy_bl2(BL2_START_OFFSET, BL2_SIZE_BLOC_COUNT,
CONFIG_SYS_TEXT_BASE);
break;
+ case BOOT_MODE_EMMC:
+ /* Set the FSYS1 clock divisor value for EMMC boot */
+ emmc_boot_clk_div_set();
+
+ copy_bl2_from_emmc = get_irom_func(EMMC44_INDEX);
+ end_bootop_from_emmc = get_irom_func(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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