我们这边是根据beaglebone白板改的
之前一直都很正常
最近有两块板子，启动之后走到
omap2-nand omap2-nand.0: start nand_scan_ident...........
这句就停住了，软件方面说是nand读取失败，我这边量外部电路都是正常的
请问各位大神知道具体是哪的问题么？请给个指点
非常感谢
下面是全部打印：
[loader] U-Boot SPL 2011.09-svn2128 (Mar 20 2014 - 14:25:38)
[loader] Texas Instruments Revision detection unimplemented
Incorrect magic number in EEPROM
read_eeprom() failure
boot device - 8
OMAP SD/MMC: 0
reading u-boot.img
reading u-boot.img
U-Boot 2011.09-svn1590 (Nov 13 2013 - 14:44:59)
I2C: ready
DRAM: 256 MiB
WARNING: Caches not enabled
Incorrect magic number in EEPROM
NAND: HW ECC Hamming Code selected
Enter nand_get_flash_type.......
No NAND device found!!!
base_address[134217728]: 0x00000080
0 MiB
MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
*** Warning - readenv() failed, using default environment
Net: cpsw
Hit any key to stop autoboot: 0
SD/MMC found on device 0
reading uEnv.txt
** Unable to read "uEnv.txt" from mmc 0:1 **
reading uImage
3070712 bytes read
## Booting kernel from Legacy Image at 80007fc0 ...
Image Name: Linux-3.2.0-svn2128
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 3070648 Bytes = 2.9 MiB
Load Address: 80008000
Entry Point: 80008000
Verifying Checksum ... OK
XIP Kernel Image ... OK
OK
Starting kernel ...
Uncompressing Linux... done, booting the kernel.
[ 0.000000] Linux version 3.2.0-svn2128 (judy@localhost.localdomain) (gcc version 4.5.3 20110311 (prerelease) (GCC) ) #88 Thu Apr 24 08:46:29 CST 2014
[ 0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c53c7d
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[ 0.000000] Machine: am335xevm
[ 0.000000] Memory policy: ECC disabled, Data cache writeback
[ 0.000000] AM335X ES1.0 (sgx neon )
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 65024
[ 0.000000] Kernel command line: console=ttyO0,115200n8 root=/dev/mmcblk0p2 rw rootfstype=ext3 rootwait ip=none
[ 0.000000] PID hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
[ 0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
[ 0.000000] Memory: 256MB = 256MB total
[ 0.000000] Memory: 253444k/253444k available, 8700k reserved, 0K highmem
[ 0.000000] Virtual kernel memory layout:
[ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)
[ 0.000000] fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)
[ 0.000000] vmalloc : 0xd0800000 - 0xff000000 ( 744 MB)
[ 0.000000] lowmem : 0xc0000000 - 0xd0000000 ( 256 MB)
[ 0.000000] modules : 0xbf000000 - 0xc0000000 ( 16 MB)
[ 0.000000] .text : 0xc0008000 - 0xc057a000 (5576 kB)
[ 0.000000] .init : 0xc057a000 - 0xc05b7000 ( 244 kB)
[ 0.000000] .data : 0xc05b8000 - 0xc0615340 ( 373 kB)
[ 0.000000] .bss : 0xc0615364 - 0xc06421e4 ( 180 kB)
[ 0.000000] NR_IRQS:396
[ 0.000000] IRQ: Found an INTC at 0xfa200000 (revision 5.0) with 128 interrupts
[ 0.000000] Total of 128 interrupts on 1 active controller
[ 0.000000] OMAP clockevent source: GPTIMER2 at 24000000 Hz
[ 0.000000] OMAP clocksource: GPTIMER1 at 32768 Hz
[ 0.000000] sched_clock: 32 bits at 32kHz, resolution 30517ns, wraps every 131071999ms
[ 0.000000] Console: colour dummy device 80x30
[ 0.000183] Calibrating delay loop... 498.89 BogoMIPS (lpj=2494464)
[ 0.058563] pid_max: default: 32768 minimum: 301
[ 0.058715] Security Framework initialized
[ 0.058837] Mount-cache hash table entries: 512
[ 0.059326] CPU: Testing write buffer coherency: ok
[ 0.080902] omap_hwmod: gfx: failed to hardreset
[ 0.097656] omap_hwmod: pruss: failed to hardreset
[ 0.099090] print_constraints: dummy:
[ 0.099548] NET: Registered protocol family 16
[ 0.102355] OMAP GPIO hardware version 0.1
[ 0.105926] omap_mux_init: Add partition: #1: core, flags: 0
[ 0.108886] omap_i2c.1: alias fck already exists
[ 0.110076] omap2_mcspi.1: alias fck already exists
[ 0.110382] omap2_mcspi.2: alias fck already exists
[ 0.110748] edma.0: alias fck already exists
[ 0.110778] edma.0: alias fck already exists
[ 0.110778] edma.0: alias fck already exists
[ 0.147033] bio: create slab <bio-0> at 0
[ 0.150024] SCSI subsystem initialized
[ 0.152221] usbcore: registered new interface driver usbfs
[ 0.152435] enter usb_hub_init.......................................
[ 0.152648] usbcore: registered new interface driver hub
[ 0.152923] usbcore: registered new device driver usb
[ 0.153106] musb-ti81xx musb-ti81xx: musb0, board_mode=0x13, plat_mode=0x3
[ 0.153472] musb-ti81xx musb-ti81xx: musb1, board_mode=0x13, plat_mode=0x1
[ 0.154998] omap_i2c omap_i2c.1: bus 1 rev2.4.0 at 100 kHz
[ 0.156860] tps65910 1-002d: could not be detected
[ 0.158050] Advanced Linux Sound Architecture Driver Version 1.0.24.
[ 0.158355] in register_netdevice, dev->name=lo
[ 0.158386] Enter netdev_register_kobject
[ 0.159027] end register_netdevice
[ 0.159667] Switching to clocksource gp timer
[ 0.181274] musb-hdrc: version 6.0, ?dma?, otg (peripheral+host)
[ 0.181488] musb-hdrc musb-hdrc.0: dma type: pio
[ 0.182708] musb-hdrc musb-hdrc.0: USB OTG mode controller at d081c000 using PIO, IRQ 18
[ 0.182922] musb-hdrc musb-hdrc.1: dma type: pio
[ 0.183441] musb-hdrc musb-hdrc.1: MUSB HDRC host driver
[ 0.183532] musb-hdrc musb-hdrc.1: new USB bus registered, assigned bus number 1
[ 0.183715] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[ 0.183715] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.183746] usb usb1: Product: MUSB HDRC host driver
[ 0.183746] usb usb1: Manufacturer: Linux 3.2.0-svn2128 musb-hcd
[ 0.183776] usb usb1: SerialNumber: musb-hdrc.1
[ 0.184875] hub 1-0:1.0: enter hub_probe()........
[ 0.184906] hub 1-0:1.0: USB hub found
[ 0.184936] hub 1-0:1.0: call hub_configure()........
[ 0.184967] hub 1-0:1.0: 1 port detected
[ 0.185729] musb-hdrc musb-hdrc.1: USB Host mode controller at d081e800 using PIO, IRQ 19
[ 0.186279] NET: Registered protocol family 2
[ 0.186523] IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.186889] TCP established hash table entries: 8192 (order: 4, 65536 bytes)
[ 0.187133] TCP bind hash table entries: 8192 (order: 3, 32768 bytes)
[ 0.187255] TCP: Hash tables configured (established 8192 bind 8192)
[ 0.187286] TCP reno registered
[ 0.187286] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 0.187316] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 0.187561] NET: Registered protocol family 1
[ 0.187896] RPC: Registered named UNIX socket transport module.
[ 0.187927] RPC: Registered udp transport module.
[ 0.187927] RPC: Registered tcp transport module.
[ 0.187957] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 0.188262] NetWinder Floating Point Emulator V0.97 (double precision)
[ 0.202301] VFS: Disk quotas dquot_6.5.2
[ 0.202362] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[ 0.203094] msgmni has been set to 495
[ 0.204040] io scheduler noop registered
[ 0.204071] io scheduler deadline registered
[ 0.204132] io scheduler cfq registered (default)
[ 0.205749] Could not set LED4 to fully on
[ 0.207885] omap_uart.0: ttyO0 at MMIO 0x44e09000 (irq = 72) is a OMAP UART0
[ 0.783142] ti81xx_interrupt 939: VBUS error workaround (delay coming)
[ 0.790039] console [ttyO0] enabled
[ 0.794525] omap_uart.1: ttyO1 at MMIO 0x48022000 (irq = 73) is a OMAP UART1
[ 0.802612] omap_uart.2: ttyO2 at MMIO 0x48024000 (irq = 74) is a OMAP UART2
[ 0.810607] omap_uart.3: ttyO3 at MMIO 0x481a6000 (irq = 44) is a OMAP UART3
[ 0.818572] omap_uart.4: ttyO4 at MMIO 0x481a8000 (irq = 45) is a OMAP UART4
[ 0.826568] omap_uart.5: ttyO5 at MMIO 0x481aa000 (irq = 46) is a OMAP UART5
[ 0.847442] brd: module loaded
[ 0.857666] loop: module loaded
[ 0.861267] i2c-core: driver [tsl2550] using legacy suspend method
[ 0.867797] i2c-core: driver [tsl2550] using legacy resume method
[ 0.874328] at24 1-0051: 32768 byte 24c256 EEPROM, writable, 64 bytes/write
[ 0.940246] No daughter card found
[ 0.943908] at24 1-0050: 32768 byte 24c256 EEPROM, writable, 64 bytes/write
[ 0.959564] Board name:
[ 0.962982] Board version:
[ 0.966278] The board is a AM335x Beaglebone.
[ 0.971832] tps65217 1-0024: TPS65217 ID 0xf version 1.1
[ 0.979766] print_constraints: DCDC1: 900 <--> 1800 mV at 1800 mV
[ 0.988616] print_constraints: DCDC2: 900 <--> 3300 mV at 1100 mV
[ 0.997436] print_constraints: DCDC3: 900 <--> 1500 mV at 1100 mV
[ 1.006256] print_constraints: LDO1: 1000 <--> 3300 mV at 1800 mV
[ 1.015075] print_constraints: LDO2: 900 <--> 3300 mV at 3300 mV
[ 1.023803] print_constraints: LDO3: 1800 <--> 3300 mV at 3300 mV
[ 1.032623] print_constraints: LDO4: 1800 <--> 3300 mV at 3300 mV
[ 1.039825] omap_hsmmc.0: alias fck already exists
[ 1.045593] Enter evm_nand_init...............
[ 1.051177] [GPMC] Enter gpmc_probe...............
[ 1.056427] omap-gpmc omap-gpmc: GPMC revision 6.0
[ 1.061492] [GPMC] start call gpmc_nand_init...............
[ 1.067474] Registering NAND on CS0
[ 1.071960] SETUP GPMC_FPGA PIN
[ 1.075714] gpmc_fpga_init(),add into am335x_FPGA_boardinfo
[ 1.081604] SET timing for gmfc-fpga.
[ 1.085845] in am33xx_cpsw_init, cpsw_slaves[0] = FF:FF:FF:FF:FF:FF
[ 1.092468] in am33xx_cpsw_init, cpsw_slaves[1] = FF:FF:FF:FF:FF:FF
[ 1.101806] init_mtdblock..............
[ 1.105957] mtdoops: mtd device (mtddev=name/number) must be supplied
[ 1.113464] omap2-nand driver initializing
[ 1.117858] Enter omap_nand_probe...........
[ 1.122558] omap2-nand omap2-nand.0: start nand_scan_ident...........
