cmd52命令发送mmc_linux2.6.24.3下移植SD/MMC到S3C2440上的全过程

移植SD/MMC驱动&＃xff0c;费劲周折&＃xff0c;问题最大是patch不对。不过千辛万苦总算是找到了。特来分享。

1。首先下载2.6.24.3内核源码。其他内核不保证可以。移植部分就不讲了&＃xff0c;如果不会参考我的其他文章。我仅仅测试了这个。

2.去http://svnweb.openmoko.org/*checkout*/branches/src/target/kernel/2.6.24.x/patches/s3c_mci.patch?rev&＃61;4096

下载SD/MMC patch&＃xff0c;其他早期版本不行&＃xff0c;我就栽倒了这个地方。

3.把 s3c_mci.patch copy到linux-2.6.24.3下。执行patch -p1

4.make menuconfig&＃xff0c;选择MMC/SD &＃xff0c;选择语言CP437,ISO 8859-1,最好也同时选择SCSI相关的东西吧&＃xff0c;连USB也一块支持了。

(昨天SD一直不成功&＃xff0c;就把U盘测试了&＃xff0c;至少要保证有成绩啊。

5.对于patch生成的s3cmci.c还要加入detect脚位&＃xff0c;我选择的是S3C2410_GPG8。设定&＃xff1a;

static struct s3c24xx_mci_pdata s3cmci_def_pdata &＃61; {

.do_dma        &＃61; 0,

.gpio_detect    &＃61; S3C2410_GPG8,

.set_power    &＃61; NULL,

.ocr_avail    &＃61; MMC_VDD_32_33,

};

6.编译下载。

出现信息如下&＃xff1a;

--------start mdev-------

s3c2440-sdi s3c2410-sdi: running at 0kHz (requested: 0kHz).

s3c2440-sdi s3c2410-sdi: running at 198kHz (requested: 197kHz).

s3c2440-sdi s3c2410-sdi: running at 198kHz (requested: 197kHz).

s3c2440-sdi s3c2410-sdi: running at 198kHz (requested: 197kHz).

s3c2440-sdi s3c2410-sdi: CMD[FAIL(-110)] #2 op:CMD8 arg:0x000001aa flags:0x082f5

retries:0 Status:nothing to complete

s3c2440-sdi s3c2410-sdi: CMD[FAIL(-110)] #3 op:CMD5 arg:0x00000000 flags:0x082e1

retries:3 Status:nothing to complete

s3c2440-sdi s3c2410-sdi: CMD[FAIL(-110)] #4 op:CMD5 arg:0x00000000 flags:0x082e1

retries:2 Status:nothing to complete

s3c2440-sdi s3c2410-sdi: CMD[FAIL(-110)] #5 op:CMD5 arg:0x00000000 flags:0x082e1

retries:1 Status:nothing to complete

s3c2440-sdi s3c2410-sdi: CMD[FAIL(-110)] #6 op:CMD5 arg:0x00000000 flags:0x082e1

retries:0 Status:nothing to complete

s3c2440-sdi s3c2410-sdi: running at 198kHz (requested: 197kHz).

s3c2440-sdi s3c2410-sdi: running at 198kHz (requested: 197kHz).

s3c2440-sdi s3c2410-sdi: running at 198kHz (requested: 197kHz).

s3c2440-sdi s3c2410-sdi: CMD[FAIL(-110)] #10 op:CMD8 arg:0x000001aa flags:0x082f

5 retries:0 Status:nothing to complete

s3c2440-sdi s3c2410-sdi: running at 198kHz (requested: 197kHz).

s3c2440-sdi s3c2410-sdi: running at 16875kHz (requested: 25000kHz).

s3c2440-sdi s3c2410-sdi: running at 16875kHz (requested: 25000kHz).

mmc0: new SD card at address 73ef

mmcblk0: mmc0:73ef SD064 62080KiB

mmcblk0:<7>mmc0: starting CMD18 arg 00000000 flags 000000b5

p1

***********************

love linux

starting pid 801, tty &＃39;&＃39;: &＃39;-/bin/sh&＃39;

Processing /etc/profile...

Set search library path in /etc/profile

Set user path in /etc/profile

Done

[root&＃64;/]#cat /proc/partitions

major minor  #blocks  name

31     0        384 mtdblock0

31     1       2048 mtdblock1

31     2      63040 mtdblock2

179     0      62080 mmcblk0

179     1      62060 mmcblk0p1

[root&＃64;/]#mount -t vfat /dev/mmcblk0p1 /mnt/temp

成功&＃xff0c;ok。感谢所有的Linux开发和支持者。感谢openmoko开源软件。

(creator)