移植SD卡驱动 for mini2440 & Linux2.6.30.4

添加SD设备到设备初始化列表中：
# gedit arch/arm/plat-s3c24xx/common-smdk.c
在186行：

/* devices we initialise */
static struct platform_device __initdata *smdk_devs[] = {
      &s3c_device_nand,
      &s3c_device_sdi, //加入这一句
      &smdk_led4,
      &smdk_led5,
      &smdk_led6,
      &smdk_led7,
};

添加和开发板相关的 SD 卡插拔引发的中断：
# gedit drivers/mmc/host/s3cmci.c
在1335行，添加如下内容：

host->irq_cd = IRQ_EINT16;
s3c2410_gpio_cfgpin(S3C2410_GPG8, S3C2410_GPG8_EINT16);

后来发现，系统启动后插入大容量卡时会出现初始化错误的问题，网上找到答案－－供电未稳定～～解决方法：
# gedit drivers/mmc/core/sd.c
找到 mmc_sd_init_card() 函数的定义，
在调用 mmc_read_switch(card) 函数前加上10ms的延时，即加入下面的一句：
mdelay(10);

配置：
# make menuconfig
选上以下几项：

Device Drivers --->
        <*> MMC/SD/SDIO card support --->
        --- MMC/SD/SDIO card support
                *** MMC/SD/SDIO Card Drivers ***
                        <*> MMC block device driver
                *** MMC/SD/SDIO Host Controller Drivers ***
                        <*> Samsung S3C SD/MMC Card Interface suppor

编译：
# make zImage

下载新内核，启动后插入SD卡：

s3c2440-sdi s3c2440-sdi: running at 0kHz (requested: 0kHz.
s3c2440-sdi s3c2440-sdi: running at 198kHz (requested: 197kHz).
s3c2440-sdi s3c2440-sdi: running at 198kHz (requested: 197kHz).
s3c2440-sdi s3c2440-sdi: running at 198kHz (requested: 197kHz).
s3c2440-sdi s3c2440-sdi: running at 198kHz (requested: 197kHz).
s3c2440-sdi s3c2440-sdi: running at 198kHz (requested: 197kHz).
s3c2440-sdi s3c2440-sdi: running at 198kHz (requested: 197kHz).
s3c2440-sdi s3c2440-sdi: running at 198kHz (requested: 197kHz).
s3c2440-sdi s3c2440-sdi: running at 16875kHz (requested:).
s3c2440-sdi s3c2440-sdi: running at 16875kHz (requested:).
mmc0: new SD card at address e624
mmcblk0: mmc0:e624 SD128 120 MiB
 mmcblk0: p1 p2
FAT: bogus number of reserved sectors 25000kHz 25000kHz