嵌入式

Linux下SD卡驱动移植

2019-07-13 00:10发布

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 使用Linux3.2.81内核   1.arch/arm/mach-s3c2440/mach-smdk2440.c platform结构中增加&s3c_device_sdi语句。 static structplatform_device*smdk2440_devices[] __initdata = { &s3c_device_usb, &s3c_device_lcd, &s3c_device_wdt, &s3c_device_i2c, &s3c_device_iis, &s3c_device_nand, &s3c_device_sdi,                //add here };   2、添加和开发板相关的 SD 卡插拔引发的中断：drivers/mmc/host/s3cmci.c   host->sdio_irqen= enable;       //添加以下两行，根据原理图进行相应引脚的修改       host->irq_cd = IRQ_EINT16;       s3c2410_gpio_cfgpin(S3C2410_GPG(8),S3C2410_GPG8_EINT16);         if (enable == host->sdio_irqen)              goto same_state;   3、执行make menuconfig              Device Driversà                     <*> MMC/SD/SDIO cardsupportà                              <*>  MMC block device driver                              <*>  Samsung S3C SD/MMC Card Interface support                              [*]    Hardware support for SDIO IRQ      //一定要选          Filesystemsà                     DOS/FAT/NT Filesystemsà                            (936) Default codepage for FAT                     Native language supportà                            <*>   Simplified Chinese charset (CP936, GB2312)   //支持中文                            <*>   NLS ISO 8859-1  (Latin 1; Western European Languages)   4、重新编译内核，然后下载 5、挂载SD卡 :  mount -tvfat /dev/mmcblk0 /mnt

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