x210項目重新回顧之三移植uboot_2013.10到x210開發板

細節參見朱老師課程，

代碼參見https://github.com/jimingkang/news5pv210裏面uboot_2013.10(官方)和aston_uboot_2013.10(朱老師移植的)

-------------------------------------------------------------------------------------------------------------------------------

1 生成補丁；diff -urN u-boot-2013.10 u-boot-2013.10_aston >2013_uboot_aston.txt

2.分析變動，發現主要修改的文件如下：

#第一階段（BL1）和重定位

arch/arm/cpu/armv7/start.S 
arch/arm/lib/crt0.S 
/arch/arm/lib/board.c
board/samsung/goni/lowlevel_init.S 
arch/arm/cpu/u-boot.lds 
board/samsung/goni/Makefile

include/s5pc110.h 
include/configs/s5p_goni.h 
arch/arm/cpu/armv7/s5p-common/cpu_info.c .
arch/arm/include/asm/arch-s5pc1xx/cpu.h

#時鐘
arch/arm/cpu/armv7/s5pc1xx/clock.c 

# sd/mmc driver mmc驅動

include/movi.h
 /root/winshare/s5pv210/uboot/u-boot-2013.10/drivers/mmc/mmc.c 
/root/winshare/s5pv210/uboot/u-boot-2013.10/drivers/mmc/s3c_hsmmc.c 
 /root/winshare/s5pv210/uboot/u-boot-2013.10/include/mmc.h 
 /root/winshare/s5pv210/uboot/u-boot-2013.10/include/s3c_hsmmc.h
 /root/winshare/s5pv210/uboot/u-boot-2013.10/common/cmd_mmc.c 
 /root/winshare/s5pv210/uboot/u-boot-2013.10/drivers/mmc/Makefile

#network 網絡
/root/winshare/s5pv210/uboot/u-boot-2013.10/net/eth.c

具體修改如下：

1）start.S

+    // 添加16字節佔位，否則和sd_fusing中mkbl1不適配，就會出現校驗和失敗
+    .word 0x2000
+    .word 0x0
+    .word 0x0
+    .word 0x0
+

+.globl _bss_start
+_bss_start:
+    .word __bss_start
+    
+.globl _bss_end
+_bss_end:
+    .word _end
+

+    // 在cpu_init_crit函數中最後初始化完了DDR，然後在下面跳轉到了第二階段，所以
+    // 重定位代碼就在這裏進行
+
+    // 第一步: 加一個調試信息串口輸出字符來做調試定位
+    // 打印字符'A'
+    ldr r1, =0x41414141
+    ldr r2, =0xE2900820
+    str r1, [r2]        @'A'
+
+    // 正式開始重定位
+    
+    /* get ready to call C functions */
+    ldr    sp, _TEXT_BASE    /* setup temp stack pointer */
+    sub    sp, sp, #12
+    mov    fp, #0            /* no previous frame, so fp=0 */
+
+    ldr    r0, =0xff000fff
+    bic    r1, pc, r0        /* r0 <- current base addr of code */
+    ldr    r2, _TEXT_BASE        /* r1 <- original base addr in ram */
+    bic    r2, r2, r0        /* r0 <- current base addr of code */
+    cmp     r1, r2                  /* compare r0, r1                  */
+    beq     after_copy        /* r0 == r1 then skip flash copy   */
+
+/* If BL1 was copied from SD/MMC CH2 */
+    ldr    r0, =0xD0037488
+    ldr    r1, [r0]
+    ldr    r2, =0xEB200000
+    cmp    r1, r2
+    beq     mmcsd_boot
+    
+mmcsd_boot:
+        bl        movi_bl2_copy
+        b        after_copy
+
+after_copy:
+    // 這裏有一些設置sp的代碼，暫時不要，到時候不對了再說
+    
+clear_bss:
+    ldr    r0, _bss_start        /* find start of bss segment        */
+    ldr    r1, _bss_end        /* stop here                        */
+    mov     r2, #0x00000000        /* clear                            */
+
+clbss_l:
+    str    r2, [r0]        /* clear loop...                    */
+    add    r0, r0, #4
+    cmp    r0, r1
+    ble    clbss_l

+    // 第一階段和第二階段的分界點
+    ldr    pc, __main
+__main:    .word _main
 
 

2）鏈接文件

diff -urN u-boot-2013.10/arch/arm/cpu/u-boot.lds u-boot-2013.10_aston/arch/arm/cpu/u-boot.lds
@@ -19,6 +19,9 @@
     {
         *(.__image_copy_start)
         CPUDIR/start.o (.text*)
+        board/samsung/goni/lowlevel_init.o (.text*)
+        board/samsung/goni/cpu_init.o (.text*)
+        board/samsung/goni/movi.o (.text*)
         *(.text*)
     }
 3)cpu.h

diff -urN u-boot-2013.10/arch/arm/include/asm/arch-s5pc1xx/cpu.h u-boot-2013.10_aston/arch/arm/include/asm/arch-s5pc1xx/cpu.h
 

4)board.c

diff -urN u-boot-2013.10/arch/arm/lib/board.c u-boot-2013.10_aston/arch/arm/lib/board.c
註釋//enable_caches();

5) crt0.S

diff -urN u-boot-2013.10/arch/arm/lib/crt0.S u-boot-2013.10_aston/arch/arm/lib/crt0.S
 

6)cpu_init.S

diff -urN u-boot-2013.10/board/samsung/goni/cpu_init.S u-boot-2013.10_aston/board/samsung/goni/cpu_init.S
增加函數mem_ctrl_asm_init，準備給start.S調用

7)goni.c

diff -urN u-boot-2013.10/board/samsung/goni/goni.c u-boot-2013.10_aston/board/samsung/goni/goni.c

添加：#include <s5pc110.h>
添加函數 dm9000_pre_init
 修改：int board_init(void)
 {
     /* Set Initial global variables */
     s5pc110_gpio = (struct s5pc110_gpio *)S5PC110_GPIO_BASE;
 
-    gd->bd->bi_arch_number = MACH_TYPE_GONI;
+    gd->bd->bi_arch_number = MACH_TYPE_SMDKV210;        // 在這裏更改
     gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
 
 添加網卡初始化
+#ifdef CONFIG_DRIVER_DM9000
+    dm9000_pre_init();
+#endif

 
 int power_init_board(void)
 {
+#if 0
     int ret;
 
     /*
@@ -39,14 +75,13 @@
     ret = pmic_init(I2C_0);
     if (ret)
         return ret;
-
+#endif
     return 0;
 }
 添加內存條初始化
 int dram_init(void)
 {
-    gd->ram_size = PHYS_SDRAM_1_SIZE + PHYS_SDRAM_2_SIZE +
-            PHYS_SDRAM_3_SIZE;
+    gd->ram_size = PHYS_SDRAM_1_SIZE + PHYS_SDRAM_2_SIZE;
 
     return 0;
 }
@@ -57,14 +92,14 @@
     gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
     gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
     gd->bd->bi_dram[1].size = PHYS_SDRAM_2_SIZE;
-    gd->bd->bi_dram[2].start = PHYS_SDRAM_3;
-    gd->bd->bi_dram[2].size = PHYS_SDRAM_3_SIZE;
+    
 }
 
 #ifdef CONFIG_DISPLAY_BOARDINFO
 int checkboard(void)
 {
-    puts("Board:\tGoni\n");
+    //puts("Board:\tGoni\n");
+    puts("Board:\tAston210\n");
     return 0;
 }
 #endif
 添加mmc也即是sd卡初始化
 #ifdef CONFIG_GENERIC_MMC
 int board_mmc_init(bd_t *bis)
 {
+#ifdef CONFIG_S3C_HSMMC
+    setup_hsmmc_clock();
+    setup_hsmmc_cfg_gpio();
+    return smdk_s3c_hsmmc_init();
+#else
+    return 0;
+#endif
+
+    
+
+#if 0
     int i, ret, ret_sd = 0;
 
     /* MASSMEMORY_EN: XMSMDATA7: GPJ2[7] output high */
-    s5p_gpio_direction_output(&s5pc110_gpio->j2, 7, 1);
+    s5p_gpio_direction_output(&s5pc110_gpio->j2, 7, 1);            // GPJ2_7
 
     /*
      * MMC0 GPIO
@@ -88,7 +134,7 @@
         if (i == 2)
             continue;
         /* GPG0[0:6] special function 2 */
-        s5p_gpio_cfg_pin(&s5pc110_gpio->g0, i, 0x2);
+        s5p_gpio_cfg_pin(&s5pc110_gpio->g0, i, 0x2);        // GPG0_i 0x2
         /* GPG0[0:6] pull disable */
         s5p_gpio_set_pull(&s5pc110_gpio->g0, i, GPIO_PULL_NONE);
         /* GPG0[0:6] drv 4x */
@@ -99,6 +145,23 @@
     if (ret)
         error("MMC: Failed to init MMC:0.\n");
 
+    for (i = 0; i < 7; i++) {
+        if (i == 2)
+            continue;
+
+        /* GPG2[0:6] special function 2 */
+        s5p_gpio_cfg_pin(&s5pc110_gpio->g2, i, 0x2);
+        /* GPG2[0:6] pull disable */
+        s5p_gpio_set_pull(&s5pc110_gpio->g2, i, GPIO_PULL_NONE);
+        /* GPG2[0:6] drv 4x */
+        s5p_gpio_set_drv(&s5pc110_gpio->g2, i, GPIO_DRV_4X);
+    }
+
+    ret_sd = s5p_mmc_init(2, 4);
+    if (ret_sd)
+        error("MMC: Failed to init SD card (MMC:2).\n");
+
+#if 0
     /*
      * SD card (T_FLASH) detect and init
      * T_FLASH_DETECT: EINT28: GPH3[4] input mode
@@ -123,8 +186,10 @@
         if (ret_sd)
             error("MMC: Failed to init SD card (MMC:2).\n");
     }
+#endif
 
     return ret & ret_sd;
+#endif
 }
 #endif

 

8)level_init.S

diff -urN u-boot-2013.10/board/samsung/goni/lowlevel_init.S u-boot-2013.10_aston/board/samsung/goni/lowlevel_init.S

+#include <s5pc110.h>
 

 
  // 我們添加的開發板供電制鎖的代碼
+    ldr r0, =0xE010E81C
+    ldr r1, =0x301
+    str r1, [r0]
+
     /* setting SRAM */
     ldreq    r0, =S5PC100_SROMC_BASE
     ldrne    r0, =S5PC110_SROMC_BASE
@@ -195,10 +201,25 @@
     str    r5, [r1, #0xf00]            @ INTADDRESS
     str    r5, [r2, #0xf00]            @ INTADDRESS
 
+    // for clock init
+    bl    system_clock_init
+
     /* for UART */
     bl    uart_asm_init
 

//sram初始化，可以不要，因爲三星其他地方幫我們已經初始化了
-    bl    internal_ram_init     
+    // DDR init
+    bl    mem_ctrl_asm_init        //
+
+    // 打印字符'K'
+    
+    ldr r1, =0x4b4b4b4b
+    ldr r2, =0xE2900820
+    str r1, [r2]        @'K'
+
+    mov    lr, r11
+    mov    pc, lr
+
+    //bl    internal_ram_init
 
     cmp    r7, r8
     /* Clear wakeup status register */
@@ -245,145 +266,201 @@
  * void system_clock_init(void)
  */
 system_clock_init:
-    ldr    r0, =S5PC110_CLOCK_BASE        @ 0xE0100000
//時鐘初始化設置
+#if 1
+    ldr r0, =ELFIN_CLOCK_POWER_BASE @0xe0100000
+        
+    /* Set Mux to FIN */
+    ldr r1, =0x0
+    str r1, [r0, #CLK_SRC0_OFFSET]
+        
+    ldr r1, =APLL_LOCKTIME_VAL
+    str r1, [r0, #APLL_LOCK_OFFSET]
+        
+    /* Disable PLL */
+retryloop:
+    ldr r1, =0x0
+    str r1, [r0, #APLL_CON0_OFFSET]
+    ldr r1, =0x0
+    str r1, [r0, #MPLL_CON_OFFSET]
+        
+    ldr r1, =0x0
+    str r1, [r0, #MPLL_CON_OFFSET]
+        
+    ldr     r1, [r0, #CLK_DIV0_OFFSET]
+    ldr r2, =CLK_DIV0_MASK
+    bic r1, r1, r2
+        
+    ldr r2, =CLK_DIV0_VAL
+    orr r1, r1, r2
+    str r1, [r0, #CLK_DIV0_OFFSET]
+        
+    ldr r1, =APLL_VAL
+    str r1, [r0, #APLL_CON0_OFFSET]
+        
+    ldr r1, =MPLL_VAL
+    str r1, [r0, #MPLL_CON_OFFSET]
+        
+    ldr r1, =VPLL_VAL
+    str r1, [r0, #VPLL_CON_OFFSET]
+#if defined(CONFIG_EVT1)
+    ldr r1, =AFC_ON
+    str r1, [r0, #APLL_CON1_OFFSET]
+#endif
+    mov r1, #0x10000
+1:    subs    r1, r1, #1
+    bne 1b
+        
+
+    /* MPLL software workaround */
+    ldr r1, [r0, #MPLL_CON_OFFSET]
+    orr     r1, r1, #(1<<28)
+    str r1, [r0, #MPLL_CON_OFFSET]
+        
+    mov r1, #0x100
+1:    subs    r1, r1, #1
+    bne 1b
+        
+    ldr r1, [r0, #MPLL_CON_OFFSET]
+    and r1, r1, #(1<<29)
+    cmp r1, #(1<<29)
+    bne     retryloop
+    
+    /* H/W lock detect disable */
+    ldr r1, [r0, #MPLL_CON_OFFSET]
+    bic     r1, r1, #(1<<28)
+    str r1, [r0, #MPLL_CON_OFFSET]
+
+        
+    ldr r1, [r0, #CLK_SRC0_OFFSET]
+    ldr r2, =0x10001111
+    orr r1, r1, r2
+    str r1, [r0, #CLK_SRC0_OFFSET]
+                
+    /* CLK_DIV6 */
+    ldr r1, [r0, #CLK_DIV6_OFFSET]
+    bic r1, r1, #(0x7<<12)    @; ONENAND_RATIO: 0
+    str r1, [r0, #CLK_DIV6_OFFSET]
+        
+    mov pc, lr
+#endif
 

 
 internal_ram_init:
     ldreq    r0, =0xE3800000
@@ -446,4 +523,9 @@
     orr    r1, r1, #(1 << 7)        @ 7 = 7 * 1-bit
     str    r1, [r0, #0x4]            @ S5PC1XX_GPIO_DAT_OFFSET
 200:
+    // 串口2輸出字符'O'
+    ldr    r1, =0x4f4f4f4f
+    ldr r2, =0xE2900820
+    str    r1, [r2]        @'O'
+
     mov    pc, lr

 

9)Makefile

diff -urN u-boot-2013.10/board/samsung/goni/Makefile u-boot-2013.10_aston/board/samsung/goni/Makefile
+COBJS-y    := goni.o setup_hsmmc.o
+#SOBJS    := lowlevel_init.o
+LOW     := lowlevel_init.o cpu_init.o movi.o
 
 SRCS    := $(SOBJS:.o=.S) $(COBJS-y:.o=.c)
 OBJS    := $(addprefix $(obj),$(COBJS-y))
 SOBJS    := $(addprefix $(obj),$(SOBJS)) 
+
+all:    $(obj).depend $(LOW) $(LIB)
+
 $(LIB):    $(obj).depend $(SOBJS) $(OBJS)
     $(call cmd_link_o_target, $(SOBJS) $(OBJS))

10)movi.c

diff -urN u-boot-2013.10/board/samsung/goni/movi.c u-boot-2013.10_aston/board/samsung/goni/movi.c
添加函數：movi_bl2_copy  ，在start.S裏用到
@@ -0,0 +1,44 @@
+#include <common.h>
+#include <s5pc110.h>
+
+#include <movi.h>
+#include <asm/io.h>
+//#include <regs.h>
+#include <mmc.h>

+
+typedef u32(*copy_sd_mmc_to_mem)
+(u32 channel, u32 start_block, u16 block_size, u32 *trg, u32 init);
+
+void movi_bl2_copy(void)
+{
+    ulong ch;
+
+    ch = *(volatile u32 *)(0xD0037488);
+    copy_sd_mmc_to_mem copy_bl2 =
+        (copy_sd_mmc_to_mem) (*(u32 *) (0xD0037F98));
+
+    u32 ret;
+    if (ch == 0xEB000000) {
+        ret = copy_bl2(0, MOVI_BL2_POS, MOVI_BL2_BLKCNT,
+            CFG_PHY_UBOOT_BASE, 0);
+    }
+    else if (ch == 0xEB200000) {
+        ret = copy_bl2(2, MOVI_BL2_POS, MOVI_BL2_BLKCNT,
+            CFG_PHY_UBOOT_BASE, 0);
+    }
+    else
+        return;
+
+    if (ret == 0)
+        while (1)
+            ;
+    else
+        return;
+}
+

3. 編譯：

make s5p_goni_config

make CROSS_COMPILE=arm-none-linux-gnueabi-

 

 

4.編譯後，輸出：

--------------------------------------------------------------

SD checksum Error
KA

U-Boot 2013.10 (May 23 2020 - 13:53:39) for ASTON210

CPU:    S5PC110@400MHz
Board:  Goni
I2C:   ready
DRAM:  464 MiB
Board PMIC init
MMC:   SAMSUNG SDHCI: 0
Error detected in status(0x208020)!
Error detected in status(0x208020)!
Using default environment

In:    serial
Out:   serial
Err:   serial
Net:   Net Initialization Skipped
No ethernet found.
Hit any key to stop autoboot:  0
Unknown command 'onenand' - try 'help'
Wrong Image Format for bootm command
ERROR: can't get kernel image!