分类： LINUX
2010-03-29 14:00:43
内核版本：2.6.30.4
1. 添加s3cmci..c和s3cmci.h到drivers/mmc目录下(这两个文件在drivers/mmc/host下已存在，若编译内核时出错就把这两个文件拷贝到drivers/mmc下，而且s3cmci.c是基于s3c系列的，要将关于s3c2412和s3c2440的注释掉，否则会出现
Error:Driver 's3c2410-sdi' is already registered,aborting...
Error:Driver 's3c2412-sdi' is already registered,aborting...
Error:Driver 's3c2440-sdi' is already registered,aborting...
但是这样只可以改掉后两条错误，第一条仍然存在)，添加regs-sdi.h、mmc_debug.h到include/asm-arm/中(
添加的regs-sdi.h的内容如下：
/* linux/include/asm/arch-s3c2410/regs-sdi.h
*
* Copyright (c) 2004 Simtec Electronics
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* S3C2410 MMC/SDIO register definitions
*
* Changelog:
* 18-Aug-2004 Ben Dooks Created initial file
* 29-Nov-2004 Koen Martens Added some missing defines, fixed duplicates
* 29-Nov-2004 Ben Dooks Updated Koen's patch
*/
#ifndef __ASM_ARM_REGS_SDI
#define __ASM_ARM_REGS_SDI "regs-sdi.h"
#define S3C2410_SDICON (0x00)
#define S3C2410_SDIPRE (0x04)
#define S3C2410_SDICMDARG (0x08)
#define S3C2410_SDICMDCON (0x0C)
#define S3C2410_SDICMDSTAT (0x10)
#define S3C2410_SDIRSP0 (0x14)
#define S3C2410_SDIRSP1 (0x18)
#define S3C2410_SDIRSP2 (0x1C)
#define S3C2410_SDIRSP3 (0x20)
#define S3C2410_SDITIMER (0x24)
#define S3C2410_SDIBSIZE (0x28)
#define S3C2410_SDIDCON (0x2C)
#define S3C2410_SDIDCNT (0x30)
#define S3C2410_SDIDSTA (0x34)
#define S3C2410_SDIFSTA (0x38)
//#ifdef CONFIG_CPU_S3C2440
#define S3C2440_SDIDATA (0x40)
#define S3C2440_SDIIMSK (0x3c)
#define S3C2440_SDICON_SDRESET (1<<8)
#define S3C2440_SDICON_MMCCLOCK (1<<5)
#define S3C2440_SDIDCON_DS_BYTE (0<<22)
#define S3C2440_SDIDCON_DS_HALFWORD (1<<22)
#define S3C2440_SDIDCON_DS_WORD (2<<22)
#define S3C2440_SDIDCON_DATSTART (1<<14)
#define S3C2440_SDIFSTA_FIFORESET (1<<16)
#define S3C2440_SDIFSTA_FIFOFAIL (3<<14) /* 3 is correct (2 bits) */
//#else
#define S3C2410_SDIDATA (0x3C)
#define S3C2410_SDIIMSK (0x40)
//#endif
#define S3C2410_SDICON_BYTEORDER (1<<4)
#define S3C2410_SDICON_SDIOIRQ (1<<3)
#define S3C2410_SDICON_RWAITEN (1<<2)
#define S3C2410_SDICON_FIFORESET (1<<1)
#define S3C2410_SDICON_CLOCKTYPE (1<<0)
#define S3C2410_SDICMDCON_ABORT (1<<12)
#define S3C2410_SDICMDCON_WITHDATA (1<<11)
#define S3C2410_SDICMDCON_LONGRSP (1<<10)
#define S3C2410_SDICMDCON_WAITRSP (1<<9)
#define S3C2410_SDICMDCON_CMDSTART (1<<8)
#define S3C2410_SDICMDCON_SENDERHOST (1<<6)
//#define S3C2410_SDICMDCON_INDEX (0xff)
#define S3C2410_SDICMDCON_INDEX (0x3f)
#define S3C2410_SDICMDSTAT_CRCFAIL (1<<12)
#define S3C2410_SDICMDSTAT_CMDSENT (1<<11)
#define S3C2410_SDICMDSTAT_CMDTIMEOUT (1<<10)
#define S3C2410_SDICMDSTAT_RSPFIN (1<<9)
#define S3C2410_SDICMDSTAT_XFERING (1<<8)
#define S3C2410_SDICMDSTAT_INDEX (0xff)
#define S3C2410_SDIDCON_IRQPERIOD (1<<21)
#define S3C2410_SDIDCON_TXAFTERRESP (1<<20)
#define S3C2410_SDIDCON_RXAFTERCMD (1<<19)
#define S3C2410_SDIDCON_BUSYAFTERCMD (1<<18)
#define S3C2410_SDIDCON_BLOCKMODE (1<<17)
#define S3C2410_SDIDCON_WIDEBUS (1<<16)
#define S3C2410_SDIDCON_DMAEN (1<<15)
#define S3C2410_SDIDCON_STOP (1<<14)
#define S3C2410_SDIDCON_DATMODE (3<<12)
#define S3C2410_SDIDCON_BLKNUM (0x7ff)
/* constants for S3C2410_SDIDCON_DATMODE */
#define S3C2410_SDIDCON_XFER_READY (0<<12)
#define S3C2410_SDIDCON_XFER_CHKSTART (1<<12)
#define S3C2410_SDIDCON_XFER_RXSTART (2<<12)
#define S3C2410_SDIDCON_XFER_TXSTART (3<<12)
#define S3C2410_SDIDCON_BLKNUM_MASK (0xFFF)
#define S3C2410_SDIDCNT_BLKNUM_SHIFT (12)
#define S3C2410_SDIDCNT_BLKNUM (0x7ff)
#define S3C2410_SDIDSTA_RDYWAITREQ (1<<10)
#define S3C2410_SDIDSTA_SDIOIRQDETECT (1<<9)
#define S3C2410_SDIDSTA_FIFOFAIL (1<<8) /* reserved on 2440 */
#define S3C2410_SDIDSTA_CRCFAIL (1<<7)
#define S3C2410_SDIDSTA_RXCRCFAIL (1<<6)
#define S3C2410_SDIDSTA_DATATIMEOUT (1<<5)
#define S3C2410_SDIDSTA_XFERFINISH (1<<4)
#define S3C2410_SDIDSTA_BUSYFINISH (1<<3)
#define S3C2410_SDIDSTA_SBITERR (1<<2) /* reserved on 2410a/2440 */
#define S3C2410_SDIDSTA_TXDATAON (1<<1)
#define S3C2410_SDIDSTA_RXDATAON (1<<0)
#define S3C2410_SDIFSTA_TFDET (1<<13)
#define S3C2410_SDIFSTA_RFDET (1<<12)
//#define S3C2410_SDIFSTA_TXHALF (1<<11)
//#define S3C2410_SDIFSTA_TXEMPTY (1<<10)
#define S3C2410_SDIFSTA_TFHALF (1<<11)
#define S3C2410_SDIFSTA_TFEMPTY (1<<10)
#define S3C2410_SDIFSTA_RFLAST (1<<9)
#define S3C2410_SDIFSTA_RFFULL (1<<8)
#define S3C2410_SDIFSTA_RFHALF (1<<7)
#define S3C2410_SDIFSTA_COUNTMASK (0x7f)
#define S3C2410_SDIIMSK_RESPONSECRC (1<<17)
#define S3C2410_SDIIMSK_CMDSENT (1<<16)
#define S3C2410_SDIIMSK_CMDTIMEOUT (1<<15)
#define S3C2410_SDIIMSK_RESPONSEND (1<<14)
#define S3C2410_SDIIMSK_READWAIT (1<<13)
#define S3C2410_SDIIMSK_SDIOIRQ (1<<12)
#define S3C2410_SDIIMSK_FIFOFAIL (1<<11)
#define S3C2410_SDIIMSK_CRCSTATUS (1<<10)
#define S3C2410_SDIIMSK_DATACRC (1<<9)
#define S3C2410_SDIIMSK_DATATIMEOUT (1<<8)
#define S3C2410_SDIIMSK_DATAFINISH (1<<7)
#define S3C2410_SDIIMSK_BUSYFINISH (1<<6)
#define S3C2410_SDIIMSK_SBITERR (1<<5) /* reserved 2440/2410a */
#define S3C2410_SDIIMSK_TXFIFOHALF (1<<4)
#define S3C2410_SDIIMSK_TXFIFOEMPTY (1<<3)
#define S3C2410_SDIIMSK_RXFIFOLAST (1<<2)
#define S3C2410_SDIIMSK_RXFIFOFULL (1<<1)
#define S3C2410_SDIIMSK_RXFIFOHALF (1<<0)
#endif /* __ASM_ARM_REGS_SDI */
添加的mmc_debug.h的内容如下：
#ifndef MMC_DEBUG_H
#define MMC_DEBUG_H
char *mmc_cmd2str(int err);
char *mmc_err2str(int err);
#endif /* MMC_DEBUG_H */ )。
2. 删除s3c2410mci.c中以下几句：(在2.6.30.4内核中已存在的s3cmci.c中没有下面的这段代码，故不用改动即可)
if(host->mrq->cmd->flags & MMC_RSP_CRC) {
host->mrq->cmd->error = MMC_ERR_BADCRC;
goto transfer_closed;
}
3. 在arch/arm/mach-s3c2410/mach－smdk2410.c platform结构中增加&s3c_device_sdi语句,同时要添加头文件#include
static struct platform_device *smdk2410_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
};
4. 修改drivers/mmc下的Kconfig和Makefile。
在Kconfig中添加：
menu "MMC/SD Card support"
config SD //add here
tristate "SD support"
help
config MMC
tristate "MMC support"
help
MMC is the "multi-media card" bus protocol.
If you want MMC support, you should say Y here and also to the specific driver for your MMC interface.
endmenu
在Makefile中添加：
obj-$(CONFIG_MMC_ARMMMCI) += mmci.o
obj-$(CONFIG_MMC_PXA) += pxamci.o
obj-$(CONFIG_MMC_WBSD) += wbsd.o
obj-$(CONFIG_SD) +=s3cmci.o
5. 添加内核的支持
Make menuconfig，将内核中关于MMC/SD的选项都选上，
最后make zImage
通常的驱动还不支持热插拔，因此在内核启动前先将sd卡插上。移植成功后，在启动信息中会显示：
mmc0: new SD card at address 8fe4
mmcblk0: mmc0:8fe4 SD02G 1.84 GiB
mmcblk0:
eth0: link up, 100Mbps, full-duplex, lpa 0xC5E1
如果使用的SD卡是没有被格式化的，就会出现如下信息：
mmc0: new SD card at address 8fe4
mmcblk0: mmc0:8fe4 SD02G 1.84 GiB
mmcblk0: unknown partition table
eth0: link up, 100Mbps, full-duplex, lpa 0xC5E1
可以通过用读卡器将SD卡格式化成FAT32格式的，然后对其进行分区，不分区也可以，默认为只有一个区
移植成功后，挂载一个文件系统，在文件系统下挂载SD卡
Mount -t vfat /dev/mmcblk0 /mnt
若挂载成功，就可以在/mnt下看到SD卡的内容
Cat /proc/partitions
查看分区信息