2440+30.4 SD卡移植 （五）

SD卡移植
    在linux-2.6.30.4 中自带了SD卡的驱动，我们只需要做简单的改懂就可以使用SD卡。并且该SD卡驱动支持到32GB 的超大容量。

参考资料：tq移植手册
         



    修改"arch/arm/plat-s3c24xx/common-smdk.c" 在186行添加

smdk_devs数组中需要添加s3c_device_sdi设备

    修改"divers/mmc/host/s3cmci.c"

修改mmc驱动。drivers/mmc/host/s3cmci.c文件的s3cmci_probe()函数中需要修改CardDetect中断号，根据开发板的设置此中断号为EINT16，对应s3c2440为GPG8引脚。具体添加内容如下：
        //host->irq_cd = s3c2410_gpio_getirq(host->pdata->gpio_detect);                 
        //添加irq_cd的中断号为IRQ_EINT16且设置GPG8脚为16号中断的输入引脚                
        host->irq_cd = IRQ_EINT16;                                                      
        s3c2410_gpio_cfgpin(S3C2410_GPG(8),S3C2410_GPG8_EINT16);

   make menuconfig 选项支持 SD卡

Device Driver
    <*>MMC/SD/SDIO card support->
     ---MMC/SD/SDIO card support
        <*> MMC block device driver
        [*] MMC block device driver
        [*] Use bounce buffer for simple hosts
        <*> Samsung S3C SD/MMC Card Interface suppoet
       其他的不选

启动过程

。。。。。。。
usbcore: registered new interface driver libusual
usbcore: registered new interface driver usbserial
USB Serial support registered for generic
usbcore: registered new interface driver usbserial_generic
usbserial: USB Serial Driver core
USB Serial support registered for FTDI USB Serial Device
usbcore: registered new interface driver ftdi_sio
ftdi_sio: v1.4.3:USB FTDI Serial Converters Driver
USB Serial support registered for pl2303
usbcore: registered new interface driver pl2303
pl2303: Prolific PL2303 USB to serial adaptor driver
mice: PS/2 mouse device common for all mice
S3C2410 Watchdog Timer, (c) 2004 Simtec Electronics
s3c2410-wdt s3c2410-wdt: watchdog inactive, reset disabled, irq enabled
mapped channel 0 to 0
s3c2440-sdi s3c2440-sdi: powered down.
s3c2440-sdi s3c2440-sdi: initialisation done.
s3c2440-sdi s3c2440-sdi: running at 0kHz (requested: 0kHz).
Advanced Linux Sound Architecture Driver Version 1.0.20.
ALSA device list:
  No soundcards found.
s3c2440-sdi s3c2440-sdi: running at 196kHz (requested: 195kHz).
TCP cubic registered
NET: Registered protocol family 17
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
s3c2440-sdi s3c2440-sdi: running at 196kHz (requested: 195kHz).
s3c2440-sdi s3c2440-sdi: running at 196kHz (requested: 195kHz).
s3c2440-sdi s3c2440-sdi: powered down.
yaffs: dev is 32505858 name is "mtdblock2"
yaffs: passed flags ""
yaffs: Attempting MTD mount on 31.2, "mtdblock2"
。。。。。。

操作过程

[\u@\h \W]# ls
bin         lib         opt         sddisk      usr
dev         linuxrc     proc        sys         var
etc         lost+found  root        tmp         web
home        mnt         sbin        udisk
[\u@\h \W]# s3c2440-sdi s3c2440-sdi: running at 0kHz (requested: 0kHz).
s3c2440-sdi s3c2440-sdi: running at 196kHz (requested: 195kHz).
s3c2440-sdi s3c2440-sdi: running at 196kHz (requested: 195kHz).
s3c2440-sdi s3c2440-sdi: running at 196kHz (requested: 195kHz).
s3c2440-sdi s3c2440-sdi: running at 196kHz (requested: 195kHz).
s3c2440-sdi s3c2440-sdi: running at 196kHz (requested: 195kHz).
s3c2440-sdi s3c2440-sdi: running at 196kHz (requested: 195kHz).
s3c2440-sdi s3c2440-sdi: running at 196kHz (requested: 195kHz).
s3c2440-sdi s3c2440-sdi: running at 25000kHz (requested: 25000kHz).
s3c2440-sdi s3c2440-sdi: running at 25000kHz (requested: 25000kHz).
mmc0: new SD card at address d175
mmcblk1: mmc0:d175 SD02G 1.83 GiB
 mmcblk1: p1      ####注意这里  把mmcblk1 和p1 和在一起就是设备名称，挂载时使用
FAT: utf8 is not a recommended IO charset for FAT filesystems, filesystem will be case

[\u@\h \W]# mount /dev/mmcblk1p1 /mnt/sd/
[\u@\h \W]# ls /mnt/sd/
libpng12.so  test.txt
[\u@\h \W]# umount /mnt/sd/