S3C2440移植 u-boot-2016.11
移植完成后使用以下命令制作补丁文件：
make distclean
mv u-boot-2016.11 u-boot-2016.11_new
tar xjf u-boot-2016.11.tar.bz2
diff -urN u-boot-2016.11 u-boot-2016.11_new > u-boot-2016.11_new.patch
patch -p1 < ../u-boot-2016.11_new.patch然后我们通过补丁文件来回顾一下修改的地方：
u-boot-2016.11/include/configs/smdk2410.h文件中：
添加CONFIG_S3C2440宏定义，DM9000网卡配置，内核启动参数。修改环境变量在Norflash中的地址，因为u-boot-2016.11 生成的bin文件大小有521KB，环境变量的存放地址要在bin文件后面。
-#define CONFIG_S3C2410 /* specifically a SAMSUNG S3C2410 SoC */
+#define CONFIG_S3C2440 /* specifically a SAMSUNG S3C2410 SoC */
-#define CONFIG_CS8900 /* we have a CS8900 on-board */
-#define CONFIG_CS8900_BASE 0x19000300
-#define CONFIG_CS8900_BUS16 /* the Linux driver does accesses as shorts */
+
+#define CONFIG_DRIVER_DM9000 1
+#define CONFIG_DM9000_BASE 0x20000000
+#define DM9000_IO CONFIG_DM9000_BASE
+#define DM9000_DATA (CONFIG_DM9000_BASE + 4)
+
+/* Booting Linux */
+#define CONFIG_BOOTARGS "console=ttySAC0 root=/dev/medblock3 "
+#define CONFIG_BOOTCOMMAND "nand read 30000000 0x0 0x200000;bootm 30000000"
#define CONFIG_NETMASK 255.255.255.0
-#define CONFIG_IPADDR 10.0.0.110
-#define CONFIG_SERVERIP 10.0.0.1
+#define CONFIG_IPADDR 192.168.0.10
+#define CONFIG_SERVERIP 192.168.0.11
+
-#define CONFIG_SYS_MAX_FLASH_SECT (19)
+#define CONFIG_SYS_MAX_FLASH_SECT (256)
-#define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + 0x070000)
+#define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + 0x0F0000)
#define CONFIG_ENV_IS_IN_FLASH
#define CONFIG_ENV_SIZE 0x10000u-boot-2016.11/arch/arm/cpu/arm920t/start.S文件中：
加入设置时钟和开启ICACHE
- /* FCLK:HCLK:PCLK = 1:2:4 */
- /* default FCLK is 120 MHz ! */
- ldr r0, =CLKDIVN
- mov r1, #3
- str r1, [r0]
+#define S3C2440_MPLL_400MHZ ((0x5c<<12)|(0x01<<4)|(0x01))
+ /* 2. 设置时钟 */
+ ldr r0, =0x4c000014
+ // mov r1, #0x03; // FCLK:HCLK:PCLK=1:2:4, HDIVN=1,PDIVN=1
+ mov r1, #0x05; // FCLK:HCLK:PCLK=1:4:8
+ str r1, [r0]
+
+ /* 如果HDIVN非0，CPU的总线模式应该从“fast bus mode”变为“asynchronous bus mode” */
+ mrc p15, 0, r1, c1, c0, 0 /* 读出控制寄存器 */
+ orr r1, r1, #0xc0000000 /* 设置为“asynchronous bus mode” */
+ mcr p15, 0, r1, c1, c0, 0 /* 写入控制寄存器 */
+
+ /* MPLLCON = S3C2440_MPLL_200MHZ */
+ ldr r0, =0x4c000004
+ ldr r1, =S3C2440_MPLL_400MHZ
+ str r1, [r0]
+
+ /* 启动ICACHE */
+ mrc p15, 0, r0, c1, c0, 0 @ read control reg
+ orr r0, r0, #(1<<12)
+ mcr p15, 0, r0, c1, c0, 0 @ write it back
#endif /* CONFIG_S3C24X0 */u-boot-2016.11/board/samsung/smdk2410/lowlevel_init.S文件中：
根据S3C2440手册，修改存储控制寄存器。
SMRDATA:
- .word (0+(B1_BWSCON<<4)+(B2_BWSCON<<8)+(B3_BWSCON<<12)+(B4_BWSCON<<16)+(B5_BWSCON<<20)+(B6_BWSCON<<24)+(B7_BWSCON<<28))
- .word ((B0_Tacs<<13)+(B0_Tcos<<11)+(B0_Tacc<<8)+(B0_Tcoh<<6)+(B0_Tah<<4)+(B0_Tacp<<2)+(B0_PMC))
- .word ((B1_Tacs<<13)+(B1_Tcos<<11)+(B1_Tacc<<8)+(B1_Tcoh<<6)+(B1_Tah<<4)+(B1_Tacp<<2)+(B1_PMC))
- .word ((B2_Tacs<<13)+(B2_Tcos<<11)+(B2_Tacc<<8)+(B2_Tcoh<<6)+(B2_Tah<<4)+(B2_Tacp<<2)+(B2_PMC))
- .word ((B3_Tacs<<13)+(B3_Tcos<<11)+(B3_Tacc<<8)+(B3_Tcoh<<6)+(B3_Tah<<4)+(B3_Tacp<<2)+(B3_PMC))
- .word ((B4_Tacs<<13)+(B4_Tcos<<11)+(B4_Tacc<<8)+(B4_Tcoh<<6)+(B4_Tah<<4)+(B4_Tacp<<2)+(B4_PMC))
- .word ((B5_Tacs<<13)+(B5_Tcos<<11)+(B5_Tacc<<8)+(B5_Tcoh<<6)+(B5_Tah<<4)+(B5_Tacp<<2)+(B5_PMC))
- .word ((B6_MT<<15)+(B6_Trcd<<2)+(B6_SCAN))
- .word ((B7_MT<<15)+(B7_Trcd<<2)+(B7_SCAN))
- .word ((REFEN<<23)+(TREFMD<<22)+(Trp<<20)+(Trc<<18)+(Tchr<<16)+REFCNT)
- .word 0x32
- .word 0x30
- .word 0x30
+ .long 0x22011110 //BWSCON
+ .long 0x00000700 //BANKCON0
+ .long 0x00000700 //BANKCON1
+ .long 0x00000700 //BANKCON2
+ .long 0x00000700 //BANKCON3
+ .long 0x00000740 //BANKCON4
+ .long 0x00000700 //BANKCON5
+ .long 0x00018005 //BANKCON6
+ .long 0x00018005 //BANKCON7
+ .long 0x008C04F4 // REFRESH
+ .long 0x000000B1 //BANKSIZE
+ .long 0x00000030 //MRSRB6u-boot-2016.11/board/samsung/smdk2410/smdk2410.c文件中：
因在/start.S文件已经设置时钟，所以去掉本文件中设置时钟代码。另外开发板使用DM9000网卡，参考别的开发板，加入调用网卡初始化函数。
/* to reduce PLL lock time, adjust the LOCKTIME register */
- writel(0xFFFFFF, &clk_power->locktime);
/* configure MPLL */
- writel((M_MDIV << 12) + (M_PDIV << 4) + M_SDIV,
- &clk_power->mpllcon);
+#ifdef CONFIG_DRIVER_DM9000
+ rc = dm9000_initialize(bis);
+#endifu-boot-2016.11/drivers/mtd/jedec_flash.c文件中：
本开发板使用Norflash为MX29LV160DB，在结构体中加入该芯片的配置信息。
+ {
+ .mfr_id = (u16)MX_MANUFACT,
+ .dev_id = 0x2249,
+ .name = "MXIC MX29LV160DB",
+ .uaddr = { /* unlock addr */
+ [1] = MTD_UADDR_0x0555_0x02AA /* x16 */
+ },
+ .DevSize = SIZE_1MiB,
+ .CmdSet = P_ID_AMD_STD,
+ .NumEraseRegions= 4,
+ .regions = {
+ ERASEINFO(16*1024, 1),
+ ERASEINFO(8*1024, 2),
+ ERASEINFO(32*1024, 1),
+ ERASEINFO(64*1024, 31),
+ }
+ },u-boot-2016.11/drivers/mtd/nand/s3c2410_nand.c文件：
修改了hwcontrol()函数，添加了片选函数，在board_nand_init函数中初始化时序并使能nandFlash控制器。
- if (ctrl & NAND_CTRL_CHANGE) {
- ulong IO_ADDR_W = (ulong)nand;
-
- if (!(ctrl & NAND_CLE))
- IO_ADDR_W |= S3C2410_ADDR_NCLE;
- if (!(ctrl & NAND_ALE))
- IO_ADDR_W |= S3C2410_ADDR_NALE;
-
- chip->IO_ADDR_W = (void *)IO_ADDR_W;
-
- if (ctrl & NAND_NCE)
- writel(readl(&nand->nfconf) & ~S3C2410_NFCONF_nFCE,
- &nand->nfconf);
- else
- writel(readl(&nand->nfconf) | S3C2410_NFCONF_nFCE,
- &nand->nfconf);
+ if (ctrl & NAND_CLE) {
+ writeb(cmd, &nand->nfcmd);
}
+ else if(ctrl & NAND_ALE)
+ {
+ writeb(cmd, &nand->nfaddr);
- if (cmd != NAND_CMD_NONE)
- writeb(cmd, chip->IO_ADDR_W);
+ }
+
+
+static void s3c24x0_nand_select_chip(struct mtd_info *mtd, int chipnr)
+{
+ struct s3c24x0_nand *nand_reg = s3c24x0_get_base_nand();
+
+ switch (chipnr) {
+ case -1: /*取消选中*/
+ nand_reg->nfcont |= (1<<1);
+ break;
+ case 0:
+ nand_reg->nfcont &= ~(1<<1);
+ break;
+
+ default:
+ BUG();
+ }
+}
+
int board_nand_init(struct nand_chip *nand)
{
+/*
cfg = S3C2410_NFCONF_EN;
cfg |= S3C2410_NFCONF_TACLS(tacls - 1);
cfg |= S3C2410_NFCONF_TWRPH0(twrph0 - 1);
cfg |= S3C2410_NFCONF_TWRPH1(twrph1 - 1);
+*/
+
+//初始化时序
+ cfg = ((tacls - 1)<<12) |((twrph0 - 1)<<8) |((twrph1 - 1)<<4);
+
writel(cfg, &nand_reg->nfconf);
+//使能NAND FLASH控制器，初始化ECC,禁止片选
+ writel((1<<4)|(1<<1)|(1<<0), &nand_reg->nfcont);
- nand->select_chip = NULL;
+ nand->select_chip = s3c24x0_nand_select_chip;