AM335X开发板无法识别NAND Flash的问题

好的！还有一个问题就是我在我自己的板子上移植，首先注释掉了读eeprom，将板件强制置为gp_evm,如下：

board.c

void do_board_detect(void)
{
enable_i2c0_pin_mux();

/*
i2c_init(CONFIG_SYS_OMAP24_I2C_SPEED, CONFIG_SYS_OMAP24_I2C_SLAVE)

if (ti_i2c_eeprom_am_get(-1, CONFIG_SYS_I2C_EEPROM_ADDR))
printf("ti_i2c_eeprom_init failed\n");
*/ /*edit by zhangzhihua 2017/04/04*/
}

board.h

static inline int board_is_gp_evm(void)
{
//return board_ti_is("A33515BB");
return true;/*edit by zhangzhihua 2017/04/04*/
}

mux.c

else if (board_is_gp_evm()) {
/* General Purpose EVM */
unsigned short profile = detect_daughter_board_profile();
configure_module_pin_mux(rgmii1_pin_mux);
configure_module_pin_mux(mmc0_pin_mux);
/* In profile #2 i2c1 and spi0 conflict. */
//if (profile & ~PROFILE_2)
// configure_module_pin_mux(i2c1_pin_mux);
/* Profiles 2 & 3 don't have NAND */
#ifdef CONFIG_NAND
//if (profile & ~(PROFILE_2 | PROFILE_3)) /*edit by zhangzhihua 2017/04/04*/
configure_module_pin_mux(nand_pin_mux);
#endif
//else if (profile == PROFILE_2) {/*edit by zhangzhihua 2017/04/04*/
configure_module_pin_mux(mmc1_pin_mux);
configure_module_pin_mux(spi0_pin_mux);
//}/*edit by zhangzhihua 2017/04/04*/
}

static struct module_pin_mux nand_pin_mux[] = {
{OFFSET(gpmc_ad0), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD0 */
{OFFSET(gpmc_ad1), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD1 */
{OFFSET(gpmc_ad2), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD2 */
{OFFSET(gpmc_ad3), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD3 */
{OFFSET(gpmc_ad4), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD4 */
{OFFSET(gpmc_ad5), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD5 */
{OFFSET(gpmc_ad6), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD6 */
{OFFSET(gpmc_ad7), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD7 */
#ifdef CONFIG_SYS_NAND_BUSWIDTH_16BIT
{OFFSET(gpmc_ad8), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD8 */
{OFFSET(gpmc_ad9), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD9 */
{OFFSET(gpmc_ad10), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD10 */
{OFFSET(gpmc_ad11), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD11 */
{OFFSET(gpmc_ad12), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD12 */
{OFFSET(gpmc_ad13), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD13 */
{OFFSET(gpmc_ad14), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD14 */
{OFFSET(gpmc_ad15), (MODE(0) | PULLUDDIS | RXACTIVE)}, /* AD15 */
#endif
{OFFSET(gpmc_wait0), (MODE(0) | PULLUP_EN | RXACTIVE)}, /* nWAIT */
{OFFSET(gpmc_wpn), (MODE(7) | PULLUP_EN)}, /* nWP */
{OFFSET(gpmc_csn0), (MODE(0) | PULLUP_EN)}, /* nCS */
{OFFSET(gpmc_wen), (MODE(0) | PULLDOWN_EN)}, /* WEN */
{OFFSET(gpmc_oen_ren), (MODE(0) | PULLDOWN_EN)}, /* OE */
{OFFSET(gpmc_advn_ale), (MODE(0) | PULLDOWN_EN)}, /* ADV_ALE */
{OFFSET(gpmc_be0n_cle), (MODE(0) | PULLDOWN_EN)}, /* BE_CLE */
{-1},
};

但是在nand_base.c里的nand_get_flash_type时读出来的devid和mafid不对，正确的devid是0xDC，但是读出来是0xF0，是我nand_pin_mux配置不对还是需要其他配置？（我参考了手上能运行的一个老版本uboot里面的nand_pin_mux是一致的）！

U-Boot SPL 2016.05-00304-gad06f64-dirty (Apr 05 2017 - 09:08:47)
Trying to boot from MMC1
reading args
spl_load_image_fat_os: error reading image args, err - -1
reading u-boot.img
reading u-boot.img
reading u-boot.img
reading u-boot.img

U-Boot 2016.05-00304-gad06f64-dirty (Apr 05 2017 - 09:08:47 +0800)

CPU : AM335X-GP rev 2.1
Model: TI AM335x EVM
Watchdog enabled
DRAM: 512 MiB
NAND: In nand.c:Start to get_nand_dev_by_index
In nand-uclass.c get_nand_dev_by_index
nand_base.c:Start to scan nand flash
In nand_base.c:NAND Flash ID is 0xF0 ,maf_id is 0xF0
0 MiB
MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
MMC: no card present
** Bad device mmc 0 **
Using default environment

<ethaddr> not set. Validating first E-fuse MAC
Net: Could not get PHY for ethernet@4a100000: addr 0
eth0: ethernet@4a100000
Warning: usb_ether MAC addresses don't match:
Address in SROM is de:ad:be:ef:00:01
Address in environment is b0:d5:cc:81:84:a3
, eth1: usb_ether
Press SPACE to abort autoboot in 2 seconds
=>

是的，Nand 的ad0 123 ...7和MMC1引脚冲突了