TQ2440 Linux 系统移植

文章由LinuxBoy分享于2019-04-01 08:04:52热评（506）

TQ2440 Linux 系统移植

一、u-boot基本常用命令
1. 基本环境设置
setenv serverip 192.168.1.115
setenv ipaddr 192.168.1.211
setenv gatewayip 192.168.1.1
setenv ethaddr 1E:23:37:48:5A:6B

setenv bootargs root=/dev/mtdblock2 rootfstype=yaffs init=/linuxrc mem=64M console=ttySAC0,115200

setenv bootcmd nand read 30008000 80000 200000 \; bootm

saveenv

2. 烧写Boot
tftp 30008000 u-boot-tq.bin
nand erase 0 60000
nand write 30008000 0 60000

3. 加载内核
tftp 30008000 zImage.img
bootm

4. 烧写rootfs
(1)如果是256MB的Nand Flash，使用如下命令烧写：
   tftp 30008000 root_tq2440.yaffs2
   nand erase 480000 FB60000
   nand write.yaffs 30008000 480000 $(filesize)

(2)如果是64MB的Nand Flash，使用如下命令烧写：
   tftp 30008000 root_tq2440.yaffs2
   nand erase 480000 3B60000
   nand write.yaffs 30008000 480000 $(filesize)

5. 烧写内核

tftp 30008000 zImage.img
nand erase 80000 400000
nand write 30008000 80000 200000

6. 使用nfs配置:

setenv bootargs root=nfs nfsroot=192.168.1.115:/source/rootfs ip=192.168.1.211 console=ttySAC0,115200 init=/linuxrc mem=64M

二、Linux 2.6.32.10在tq2440开发板上的移植

明确相关板级配置:
(1) CPU -- s3c2440, 外部晶振12M
(2) SDRAM -- 64MB
(3) Nand Flash -- 64MB[K9F1208] 或 256MB[K9F2G08]
(4) 网卡 -- DM9000, 映射在BANK4

0. 外部晶振频率修改
static void __init smdk2440_map_io(void)
{
        s3c24xx_init_io(smdk2440_iodesc, ARRAY_SIZE(smdk2440_iodesc));
        s3c24xx_init_clocks(16934400);
        s3c24xx_init_uarts(smdk2440_uartcfgs, ARRAY_SIZE(smdk2440_uartcfgs));
}

=》

static void __init smdk2440_map_io(void)
{
        s3c24xx_init_io(smdk2440_iodesc, ARRAY_SIZE(smdk2440_iodesc));
        s3c24xx_init_clocks(12000000); //修改为12M
        s3c24xx_init_uarts(smdk2440_uartcfgs, ARRAY_SIZE(smdk2440_uartcfgs));
}

1.修改nand flash分区:
arch/arm/plat-s3c24xx/common-smdk.c

(1)如果是256MB的Nand,按如下修改 [256MB -- 0x10000000]

/* NAND parititon from 2.4.18-swl5 */
static struct mtd_partition smdk_default_nand_part[] = {
        [0] = {
                .name   = "BootLoader",
                .size   = 0x00060000,   /* 3 Blocks -- 384K*/
                .offset = 0,
        },
        [1] = {
                .name   = "Kernel",
                .size   = 0x00400000,   /* 32 Blocks -- 4MB */
                .offset = 0x00080000,
        },
        [2] = {
                .name   = "Rootfs",
                .size   = 0x0FB80000,   /* 251MB + 512KB*/
                .offset = 0x00480000,
        }
};

如果是256MB的Nand，使用uboot擦出分区命令如下：
//Erase Kernel Partition
nand erase 80000 400000

//Erase Rootfs Partition
nand erase 480000 FB80000

(2) 如果是64MB的Nand,按如下修改 [64MB -- 0x4000000]

/* NAND parititon from 2.4.18-swl5 */
static struct mtd_partition smdk_default_nand_part[] = {
        [0] = {
                .name   = "BootLoader",
                .size   = 0x00060000,   /* 24 Blocks -- 384K*/
                .offset = 0,
        },
        [1] = {
                .name   = "Kernel",
                .size   = 0x00400000,   /* 256 Blocks -- 4MB */
                .offset = 0x00080000,
        },
        [2] = {
                .name   = "Rootfs",
                .size   = 0x03B80000,   /* 59MB + 512KB*/
                .offset = 0x00480000,
        }
};

如果是64MB的Nand，使用uboot擦出分区命令如下：
//Erase Kernel Partition
nand erase 80000 400000

//Erase Rootfs Partition
nand erase 480000 3B80000

2. yaffs2补丁：

./patch-ker.sh c ../linux-2.6.32.10

3. DM9000网络驱动移植
(1)
arch/arm/mach-s3c2440/mach-smdk2440.c
增加

#include <linux/dm9000.h>

/* DM9000 */
static struct resource s3c_dm9k_resource[] = {
    [0] = {
        .start = S3C2410_CS4,
        .end = S3C2410_CS4 + 3,
        .flags = IORESOURCE_MEM,
    },
    [1] = {
        .start = S3C2410_CS4 + 4,
        .end = S3C2410_CS4 + 4 + 3,
        .flags = IORESOURCE_MEM,
    },
    [2] = {
        .start = IRQ_EINT7,
        .end = IRQ_EINT7,
        .flags = IORESOURCE_IRQ | IRQF_TRIGGER_RISING,
    }

};

static struct dm9000_plat_data s3c_dm9k_platdata = {
.flags = DM9000_PLATF_16BITONLY,
};

struct platform_device s3c_device_dm9000 = {
    .name = "dm9000",
    .id   = 0,
    .num_resources = ARRAY_SIZE(s3c_dm9k_resource),
    .resource = s3c_dm9k_resource,
    .dev   = {
        .platform_data = &s3c_dm9k_platdata,
    }
};

(2)
static struct platform_device *smdk2440_devices[] __initdata = {
        &s3c_device_usb,
        &s3c_device_lcd,
        &s3c_device_wdt,
        &s3c_device_i2c0,
        &s3c_device_iis,
#ifdef CONFIG_DM9000
        &s3c_device_dm9000,
#endif
};

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TQ2440 Linux 系统移植