其中有一些需要修改源码的地方会在下面说明。
9. 保存配置并退出xconfig,生成zImage文件 #make zImage
复制代码OK,将生成的zImage文件烧到开发板上就可以了。
(1). 启动
|---Boot options| |---Default kernel command string: [root=/dev/mtdblock3 rootfstype=cramfs init=/linuxrc console=ttySAC0,115200
devfs=mount mem=64]
分析:
/dev/mtdblock3 : 表示MTD分区的第3个分区存储根文件系统
rootfstype=cramfs : 分区是cramfs类型,这项不加应该关系不大
init=/linuxrc : 启动的首个脚本即根目录下的linuxrc
console=ttySAC0,115200 : 使用串口1作为串口调试,波特率设置为115200; 现在已经摒弃了以前使用ttyS0的写法
devfs=mount : 在/sbin/init运行之前能自动挂载/dev为devfs文件系统
mem=64 : 存储器大小为64M
(2).LCD支持.
修改mach-smdk2410.c文件,添加:
static struct s3c2410fb_display smdk2410_lcd_cfg __initdata = {
.lcdcon5 = S3C2410_LCDCON5_FRM565 |
S3C2410_LCDCON5_INVVLINE |
S3C2410_LCDCON5_INVVFRAME |
S3C2410_LCDCON5_PWREN |
S3C2410_LCDCON5_HWSWP,
.type = S3C2410_LCDCON1_TFT,
.width = 320,
.height = 240,
.pixclock = 270000,
.xres = 320,
.yres = 240,
.bpp = 16,
.left_margin =8,
.right_margin = 5,
.hsync_len = 63,
.upper_margin = 15,
.lower_margin = 3,
.vsync_len = 5,
};
static struct s3c2410fb_mach_info smdk2410_fb_info __initdata = {
.displays = &smdk2410_lcd_cfg,
.num_displays = 1,
.default_display = 0,
#if 0
.gpccon = 0xaa940659,
.gpccon_mask = 0xffffffff,
.gpcup = 0x0000ffff,
.gpcup_mask = 0xffffffff,
.gpdcon = 0xaa84aaa0,
.gpdcon_mask = 0xffffffff,
.gpdup = 0x0000faff,
.gpdup_mask = 0xffffffff,
#endif
.lpcsel = 0, //((0xCE6) & ~7) | 1<4,
};
复制代码(2)添加对SD卡支持
修改mach-smdk2410.c文件添加:&s3c_device_sdi,
(3)对128Mflash支持
修改/linux-2.6.28.7/drivers/mtd/nand下面的nand_bbt.c文件: static struct nand_bbt_descr largepage_memorybased = {
.options = 0,
.offs = 0,
.len = 2, // 支持128M修改为1
.pattern = scan_ff_pattern
};
static struct nand_bbt_descr largepage_flashbased = {
.options = NAND_BBT_SCAN2NDPAGE,
.offs = 0,
.len = 2, // 支持128M修改为1
.pattern = scan_ff_pattern
};
复制代码(4)修改对dm9000网卡支持
a.修改 drivers/net/dm9000.c 文件:
头文件增加:
#include //by bai
#include
#include
复制代码在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);
复制代码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); //by bai
ndev->dev_addr[i] = ne_def_eth_mac_addr[i];
}
复制代码b.修改arch/arm/mach-s3c2410/mach-smdk2410.c
在static struct platform_device *smdk2410_devices[] __initdata中添加: &s3c_device_dm9000,
static struct map_desc smdk2410_iodesc[] __initdata = {
[0] = {
.virtual = (unsigned long)S3C24XX_VA_DM9000,
.pfn = __phys_to_pfn(S3C24XX_PA_DM9000),
.length = SZ_1M,
.type = MT_DEVICE,
},
};
复制代码c.vi arch/arm/plat-s3c24xx/devs.c
添加头文件 #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