我们用的是S3C6410，做了一个底板，跟友善的硬件上的区别在于没有把写保护SD0_nWP连接到XhiDATA16/EINT21/GPL13脚上，就是说SD0_nWP是悬空的。
现在调试SD卡出现以下打印信息，不知道是不是这个写保护信号脚SD0_nWP没接的原因还是别的原因，很急，请高手指点，谢谢
mmc0: Timeout waiting for hardware interrupt.
mmc0: mmc_rescan_try_freq: trying to init card at 300000 Hz
*************************************************
mmc0: error -110 whilst initialising SD card
mmc0: Timeout waiting for hardware interrupt.
mmc0: mmc_rescan_try_freq: trying to init card at 200000 Hz
*************************************************
mmc0: error -110 whilst initialising SD card
mmc0: Timeout waiting for hardware interrupt.
mmc0: mmc_rescan_try_freq: trying to init card at 100000 Hz
*************************************************
mmc0: error -110 whilst initialising SD card
mmc0: Timeout waiting for hardware interrupt.
mmc1: mmc_rescan_try_freq: trying to init card at 400000 Hz
mmc1: mmc_rescan_try_freq: trying to init card at 300000 Hz
mmc1: mmc_rescan_try_freq: trying to init card at 200000 Hz
mmc1: mmc_rescan_try_freq: trying to init card at 100000 Hz
