SMDK5250: Enable EMMC booting

This patch adds support for EMMC booting on SMDK5250.

Signed-off-by: Amar <amarendra.xt@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

diff --git a/board/samsung/smdk5250/clock_init.c b/board/samsung/smdk5250/clock_init.c
index 5b9e82fdf7bc4d2a4c3f1191fd73100b1b2889b0..b288e66f0ebef945c91fe1d5db8b426b77f5394c 100644 (file)
--- 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 f751bcb65a6ea9f8dd16438be951a7a56a95b194..20a1d47e06de2420314f7e8e0907237e32fe3281 100644 (file)
--- 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 c0bcf460f156abf7f431928b7926fba799278c1c..98f2286f9efac619c16ba5ab162ac4aa6fb0a308 100644 (file)
--- a/board/samsung/smdk5250/spl_boot.c
+++ b/board/samsung/smdk5250/spl_boot.c
@@ -23,16 +23,44 @@
 #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,
+       USB_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 */
+       [USB_INDEX] = 0x02020070,       /* iROM Function Pointer-USB 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);
-       typedef u32 (*usb_copy_func_t)(void);
+void *get_irom_func(int index)
+{
+       return (void *)*(u32 *)irom_ptr_table[index];
+}
 
 /*
  * Set/clear program flow prediction and return the previous state.
@@ -55,13 +83,15 @@ static int config_branch_prediction(int set_cr_z)
 */
 void copy_uboot_to_ram(void)
 {
-       spi_copy_func_t spi_copy;
-       usb_copy_func_t usb_copy;
-
        int is_cr_z_set;
        unsigned int sec_boot_check;
        enum boot_mode bootmode = BOOT_MODE_OM;
-       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);
+       u32 (*usb_copy)(void);
 
        /* Read iRAM location to check for secondary USB boot mode */
        sec_boot_check = readl(EXYNOS_IRAM_SECONDARY_BASE);
@@ -73,14 +103,24 @@ void copy_uboot_to_ram(void)
 
        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);
+                        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);
+                        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;
        case BOOT_MODE_USB:
                /*
@@ -88,8 +128,7 @@ void copy_uboot_to_ram(void)
                 * before copy from USB device to RAM
                 */
                is_cr_z_set = config_branch_prediction(0);
-               usb_copy = *(usb_copy_func_t *)
-                               EXYNOS_COPY_USB_FNPTR_ADDR;
+               usb_copy = get_irom_func(USB_INDEX);
                usb_copy();
                config_branch_prediction(is_cr_z_set);
                break;
@@ -117,5 +156,4 @@ void board_init_r(gd_t *id, ulong dest_addr)
        while (1)
                ;
 }
-
 void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3) {}