linux-2.6.33移植到FL2440

宿主机：ubuntu10.04

目标机：fl2440
交叉编译器：arm-linux-gcc-3.4.1
交叉编译器路径：/usr/local/arm/3.4.1
要移植的内核版本：linux-2.6.33.19

<1>移植yaffs2驱动

yaffs下载地址：http://www.aleph1.co.uk/cgi-bin/viewcvs.cgi

tar zxvf yaffs2.tar.gz

cd yaffs2

./patch-ker.sh c /linux-2.6.33.19

<2>修改机器码

1. s3c2410 ARCH_S3C2410 S3C2410 193    删掉

1. s3c2440 ARCH_S3C2440 S3C2440 362

修改为

1. s3c2440 ARCH_S3C2440 S3C2440 193

<3> 指定编译器

ARCH                ?= arm
CROSS_COMPILE        ?= arm-linux-

<4>增加devfs文件器支持

找到 menu "Pseudo filesystems"

大概在105行

config DEVFS_FS
         bool "/dev file system support (OBSOLETE)"
         default y 
config DEVFS_MOUNT
bool "Automatically mount at boot"
default y
depends on DEVFS_FS

<5>修改晶振频率

arch/arm/mach-s3c2440/mach-smdk2440.c

s3c24xx_init_clocks(12000000);

<6>修改MTD分区

arch/arm/plat-s3c24xx/common-smdk.c

static struct mtd_partition smdk_default_nand_part[] = {
[0] = {
            .name        = "boot",
            .size        = 0x00020000,
            .offset = 0
    },
    [1] = {
            .name        = "bootParam",
            .size        = 0x00060000,
            .offset = 0x00020000,
    },
    [2] = {
            .name        = "Kernel",
            .size        = 0x00300000,
            .offset = 0x00500000,
    },
    [3] = {
            .name        = "fs_yaffs",
            .size        = 0x03c00000,
            .offset = 0x00800000,
        },       
    [4] = {
            .name        = "eboot",
            .size        = 0x00080000,
            .offset = 0x04400000,
    },
    [5] = {
            .name        = "WINCE",
            .size        = 0x03b80000,
            .offset = 0x04480000,
    }
};

<7>关闭ECC校验

drivers/mtd/nand/s3c2410.c

  chip->ecc.mode = NAND_ECC_NONE;

<8>修改nandflash驱动，支持K9F1G08的nandflash
修改drivers/mtd/nand下面的nand_bbt.c文件：

static struct nand_bbt_descr largepage_memorybased = {
        .options = 0,
        .offs = 0,
        .len = 1,           // 原数值为2，支持2K每页的flash修改为1。K9F1G08，K9F2G08是2k每页的flash
        .pattern = scan_ff_pattern
};
static struct nand_bbt_descr largepage_flashbased = {
        .options = NAND_BBT_SCAN2NDPAGE,
        .offs = 0,
        .len = 1,           //原数值为2，支持2K每页的flash修改为1。K9F1G08，K9F2G08是2k每页的flash
        .pattern = scan_ff_pattern
};

<9>开始配置内核

make s3c2410_defconfig

去掉S3C2400 Machines、S3C2410 Machines、S3C2412 Machines、S3C2442 Machines的所有选项，否则会报错。如果现在编译内核，下载到开发板中，内核就可以正常启动了。呵呵，有了雏形，咱们继续移植设备驱动

<10>支持RTC

arch/arm/mach-s3c2440/mach-smdk2440.c

static struct platform_device *smdk2440_devices[] __initdata = {
        &s3c_device_usb,
        &s3c_device_lcd,
        &s3c_device_wdt,
        &s3c_device_i2c0,
        &s3c_device_iis,
        &s3c_device_rtc,
};

<11>移植UDA1341

arch/arm/mach-s3c2440/mach-smdk2440.c

添加头文件

#include
#include

添加代码

static struct s3c24xx_uda134x_platform_data s3c24xx_uda134x_data = {
        .l3_clk = S3C2410_GPB(4),
        .l3_data = S3C2410_GPB(3),
        .l3_mode = S3C2410_GPB(2),
        .model = UDA134X_UDA1341,
};

static struct platform_device s3c24xx_uda134x = {
        .name = "s3c24xx_uda134x",
        .dev = {
                .platform_data    = &s3c24xx_uda134x_data,
        }
};

把设备添加到平台当中

static struct platform_device *smdk2440_devices[] __initdata = {
        &s3c_device_usb,
        &s3c_device_lcd,
        &s3c_device_wdt,
        &s3c_device_i2c0,
        &s3c_device_iis,
        &s3c_device_rtc,
        &s3c24xx_uda134x,
};

<12>移植DM9000

修改 drivers/net/dm9000.c 文件

#include
#include
#include

在dm9000_probe 函数开始增加：

unsigned char ne_def_eth_mac_addr[]={0x00,0x12,0x34,0x56,0x80,0x49};
    static void *bwscon;
    static void *gpfcon;
    static void *extint0;
    static void *intmsk;
    #define BWSCON           (0x48000000)
    #define GPFCON           (0x56000050)
    #define EXTINT0           (0x56000088)
    #define INTMSK           (0x4A000008)
        bwscon=ioremap_nocache(BWSCON,0x0000004);
        gpfcon=ioremap_nocache(GPFCON,0x0000004);
        extint0=ioremap_nocache(EXTINT0,0x0000004);
        intmsk=ioremap_nocache(INTMSK,0x0000004);
        writel(readl(bwscon)|0xc0000,bwscon);
        writel( (readl(gpfcon) & ~(0x3 << 14)) | (0x2 << 14), gpfcon);
        writel( readl(gpfcon) | (0x1 << 7), gpfcon); // Disable pull-up
        writel( (readl(extint0) & ~(0xf << 28)) | (0x4 << 28), extint0); //rising edge
        writel( (readl(intmsk))  & ~0x80, intmsk);  

在这个函数的最后需要修改：

if (!is_valid_ether_addr(ndev->dev_addr)) {
                mac_src = "chip";
                for (i = 0; i < 6; i++)
                        //ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
                        ndev->dev_addr[i] = ne_def_eth_mac_addr[i];
        }

2. 修改arch/arm/mach-s3c2440/mach-smdk2440.c，添加设备

static struct platform_device *smdk2440_devices[] __initdata = {
        &s3c_device_usb,
        &s3c_device_lcd,
        &s3c_device_wdt,
        &s3c_device_i2c0,
        &s3c_device_iis,

         &s3c_device_rtc,
        &s3c24xx_uda134x,
        &s3c_device_dm9000,
};

3. 修改 arch/arm/plat-s3c24xx/devs.c

#include

static struct resource s3c_dm9000_resource[] = {
        [0] = {
        .start = S3C24XX_PA_DM9000,
        .end   = S3C24XX_PA_DM9000+ 0x3,
        .flags = IORESOURCE_MEM
        },
        [1]={
        .start = S3C24XX_PA_DM9000 + 0x4, //CMD pin is A2
        .end = S3C24XX_PA_DM9000 + 0x4 + 0x7c,
        .flags = IORESOURCE_MEM
        },
        [2] = {
        .start = IRQ_EINT7,
        .end   = IRQ_EINT7,
        .flags = IORESOURCE_IRQ
        },
        };