TE2410移植linux-2.6.14及调试过程总结(1)

returndriver_register(&s3c2410_nand_driver);

}

static struct device_drivers3c2410_nand_driver= {

.name= "s3c2410-nand",

.bus= &platform_bus_type,

.probe=s3c2410_nand_probe,

.remove= s3c2410_nand_remove,

};

static ints3c2410_nand_probe(struct device *dev)

{

returns3c24xx_nand_probe(dev, 0);

}

static ints3c24xx_nand_probe(struct device *dev, int is_s3c2440)

{

struct platform_device *pdev = to_platform_device(dev);

struct s3c2410_platform_nand *plat = to_nand_plat(dev);

struct s3c2410_nand_info *info;

struct s3c2410_nand_mtd *nmtd;

struct s3c2410_nand_set *sets;

struct resource *res;

. . .

for (setno = 0; setno < nr_sets; setno++, nmtd++) {

pr_debug("initialising set %d (%p, info %p)\n",

setno, nmtd, info);

s3c2410_nand_init_chip(info, nmtd, sets);

nmtd->scan_res =nand_scan(&nmtd->mtd,

(sets) ? sets->nr_chips : 1);

if (nmtd->scan_res == 0) {

s3c2410_nand_add_partition(info, nmtd, sets);

}

if (sets != NULL)

sets++;

}

. . .

}

经过串口打印出nmtd->scan_res的值为1,根据

if (nmtd->scan_res == 0) {

s3c2410_nand_add_partition(info, nmtd, sets);

}

来判断,应该返回0.

进入nand_scan

int nand_scan (struct mtd_info *mtd, int maxchips)

{

int i, nand_maf_id, nand_dev_id, busw, maf_id;

struct nand_chip *this = mtd->priv;

. . .

/* Select the device */

this->select_chip(mtd, 0);

/* Send the command for reading device ID */

this->cmdfunc (mtd, NAND_CMD_READID, 0x00, -1);

/* Read manufacturer and device IDs */

nand_maf_id= this->read_byte(mtd);

nand_dev_id= this->read_byte(mtd);

. . .

/* Print and store flash device information */

for (i = 0; nand_flash_ids[i].name != NULL; i++) {

if (nand_dev_id != nand_flash_ids[i].id)

continue;

if (!mtd->name) mtd->name = nand_flash_ids[i].name;

this->chipsize = nand_flash_ids[i].chipsize < 20;

. . .

/* Try to identify manufacturer */

for (maf_id = 0; nand_manuf_ids[maf_id].id != 0x0; maf_id++) {

if (nand_manuf_ids[maf_id].id == nand_maf_id)

break;

}

. . .

printk (KERN_INFO "NAND device: Manufacturer ID:"

" 0x%02x, Chip ID: 0x%02x (%s %s)\n", nand_maf_id, nand_dev_id,

nand_manuf_ids[maf_id].name , nand_flash_ids[i].name);

break;

}

if (!nand_flash_ids[i].name) {

printk (KERN_WARNING "No NAND device found!!!\n");

this->select_chip(mtd, -1);

return 1;

}

. . .

}

根据上面的代码可以看出没有在nand_flash_ids数组中找到nand_dev_id匹配值,记得在u-boot中也有nand_probe函数检测NAND Flash,打印出2个ID值如下

NAND:Flash chip found:Manufacturer ID:0xEC, Chip ID:0x76

Linux中nand_flash_ids和nand_manuf_ids数组内容如下:

/*

*Chip ID list*

*Name. ID code, pagesize, chipsize in MegaByte, eraseblock size,

*/

struct nand_flash_dev nand_flash_ids[] = {

{"NAND 1MiB 5V 8-bit",0x6e, 256, 1, 0x1000, 0},

{"NAND 2MiB 5V 8-bit",0x64, 256, 2, 0x1000, 0},

{"NAND 4MiB 5V 8-bit",0x6b, 512, 4, 0x2000, 0},

{"NAND 1MiB 3,3V 8-bit",0xe8, 256, 1, 0x1000, 0},

{"NAND 1MiB 3,3V 8-bit",0xec, 256, 1, 0x1000, 0},

{"NAND 2MiB 3,3V 8-bit",0xea, 256, 2, 0x1000, 0},

{"NAND 4MiB 3,3V 8-bit",0xd5, 512, 4, 0x2000, 0},

{"NAND 4MiB 3,3V 8-bit",0xe3, 512, 4, 0x2000, 0},

{"NAND 4MiB 3,3V 8-bit",0xe5, 512, 4, 0x2000, 0},

. . .

{"NAND 64MiB 3,3V 8-bit",0x76, 512, 64, 0x4000, 0},

. . .

{NULL,}

};

/*

*Manufacturer ID list

*/

struct nand_manufacturers nand_manuf_ids[] = {

{NAND_MFR_TOSHIBA, "Toshiba"},

{NAND_MFR_SAMSUNG, "Samsung"},

{NAND_MFR_FUJITSU, "Fujitsu"},

{NAND_MFR_NATIONAL, "National"},

{NAND_MFR_RENESAS, "Renesas"},

{NAND_MFR_STMICRO, "ST Micro"},

{NAND_MFR_HYNIX, "Hynix"},

{0x0, "Unknown"}

};

/*

* NAND Flash Manufacturer ID Codes

*/

#define NAND_MFR_TOSHIBA0x98

#defineNAND_MFR_SAMSUNG0xec

#define NAND_MFR_FUJITSU0x04

#define NAND_MFR_NATIONAL0x8f

#define NAND_MFR_RENESAS0x07

#define NAND_MFR_STMICRO0x20

#define NAND_MFR_HYNIX0xad

这样就说明nand_scan中读取NAND Flash的id值是错误的,不是0xec和0x76,从串口