准备把板子的代码由DVRRDK_02.00.00.23升级到DVRRDK_04.00.00.03，按照ti的wiki：http://processors.wiki.ti.com/index.php/TI81XX_PSP_UBOOT_User_Guide
做好启动系统的SD卡，碰到如下的问题：
1. 板子设置为从NAND启动(BTMODE[3:0]=0011), 因为NAND里有DRRRDK2.0的uboot，所以会启动uboot，启动后
我用命令（nand erase 0x0 0x260000）把nand中的uboot部分擦掉，目的是让板子可以从SD卡启动。然后reset
成功的从SD卡启动了，接着把DVRRDK4.0的uboot写到nand里，设置好启动参数，加载内核后内核的打印信息不出来
反复验证后，发现需要把启动方式设置为从SD卡启动(BTMODE[3:0]=0111)，启动一次系统。之后不管是设置为从SD
卡启动还是从nand启动，内核的打印信息都可以出来。
2. 在DVRRDK4.0的uboot下，加载内核后认不到nand分区，发现是在内核代码中nand_base.c文件nand_get_flash_type
函数里读不出nand的任何信息，maf_id dev_id id_data[0] id_data[1]全部是0xff。而使用DVRRDK2.0的uboot加载同样
的内核就正常
以下是系统的log：
U-Boot 2010.06-dirty (Jun 30 2015 - 14:40:23)
DRAM: 1 GiB
MMC: OMAP SD/MMC: 0
Using default environment
Hit any key to stop autoboot: 0
TI8168_EVM#boot
raise: Signal # 8 caught
reading u-boot.noxip.bin
214184 bytes read
## Starting application at 0x80800000 ...
U-Boot 2010.06-dirty (Jul 01 2015 - 09:09:51)
TI8168-GP rev 2.0
HDVICP clk : 600MHz
L3 Fast clk : 549MHz
HDVPSS clk : 274MHz
Ducati M3 clk : 274MHz
DSP clk : 1000MHz
ARM clk : 987MHz
DDR clk : 531MHz
I2C: ready
DRAM: 1 GiB
NAND: HW ECC BCH8 Selected
256 MiB
MMC: OMAP SD/MMC: 0
:,;;:;:;;;;;;;;r;;:,;;:;:;;;;;;;;:,;;:;:;;;;;;;;:,;;:;:;;;;;;;;:;;;;;;;;:,;;:;:
;,;:::;;;;r;;;rssiSiS552X5252525259GX2X9hX9X9XX2325S55252i5:,;;:;:;;;;;;;;:,;;:
;:;;;;;;;rrssSsS52S22h52299GGAAMHMM#BBH#B#HMM#HMBA&&XX2255S2S5Si:,;;:;:;;;;;;;;
;:;;r;;rsrrriiXS5S329&A&MH#BMB#A&9XXA252GXiSXX39AAMMMBB&G22S5i2SSiiiisi:,;;:;:;
;;;;;r;rr2iisiih393HB#B#AA99i22irrrX3X52AGsisss2Xii2299HBMA&X2S5S5iSiisSsi:,;;:
r:r;rrsrsihXSi2&##MHB&Ahh3AGHGA9G9h&#H##@@@##MAMMXXX9SSS29&&HGGX2i5iisiiisisi:,
;;rrrrsSiiiA&ABH&A9GAGhAhBAMHA9HM@@@@@@@@@@@@@@@@@@@HHhAh2S2SX9&Gh22SSiisiiisii
r:rrssisiS2XM##&h3AGAX&3GG3Ssr5H@M#HM2; ;2X&&&MHMB###GBB#B&XXSSs529XX55iSsisisi
r;rsrisSi2XHAhX99A3XXG&&XS;:,rH#HGhAS @@@@3rs2XBM@@A552&&AHA2XiisSS252SSsisSs
r;issi5S22&&3iSSX292&hXsr;;:;h@&G339&S9@@@@2@MA&9&HB##Xris29ABMAAX2ir;rsSi5iss5
rrsSi2XhG&9GXh399&X99i;;;;;;r#H&293H9X#@@@@@@@B&9GhAH@XrrsrsiXABHB&HG2rr;rrSiSi
;:rsisS599&AA9XG&3A35r;:::;,;BMh&&2iX5A@@@@@@@&392X5GB2;;;r;iSX393A##A&Xi:::rsi
;:rss552222X553&XHMhir;;::,:,h#HhGSXhG3#@@@@#AXXS2XAHA;::;;;;ss55XShBA3239r:,;;
r;ii2S5SSi2i53hirsh2srr::,,,,;MMXX359&Ah3h&Si59SX99A#i:,::::;;sri2,.2r;:SGAr;,:
;:;rrrrssiriXGSi::shs;;;,,,:,,rBBA9h5s5h5iS5isi2SAHB5:,,,:::;rrs5&SrisSX5Srrr:,
;,r;;;;rsriSSrrrr;;5Xrr;;,:,,.,;9AA2SsisS5323XXXG9&i:.,,::;;r;;;srrrrrr;;:;::::
:,;r;r;rrissrrr;:;::;s;;;;,:,,..,r293h222hXXAAGGGX;:,,,:,:,::;:;::,:,,,,...,,,,
;,;;;;rrrrrrrrirr;,.,,:::::::,,,,.,;SX&ABAB2hhXir:,,.,,.,,:,,,,..,,,..,..,,,..:
:.:;:;;;:;;;;r;rrs;:.. ,,:::::,:,:,,.::rrsrr;;,,.......,..,....,,,,,,,...,.,,:,
:.:::,::::::;;r;rrr;:.......,.,.,,:::,,...............,,::.,,,,:,::,,:,:,,,:,;:
,.::,:,,,,,;;;;;;;;r;;::,..............................;;;:;::::,:::::::,:,:,,,
: ,,:,,,,,,,,,,,,,:;rrr;;:;,,,,,,,::,.,.:.,.,;s,:;;;;:;:;;;;;::::,:::,:::,:,:,:
,.,,,,,,,...,,.,,....................................:,............:,,,:,:,,,,,
Net: Detected MACID:84:7e:40:7f:d1:38
Ethernet PHY: GENERIC @ 0x01
DaVinci EMAC
Hit any key to stop autoboot: 0
TI8168_EVM#print
bootdelay=3
baudrate=115200
autoload=no
verify=yes
bootfile=uImage
ramdisk_file=ramdisk.gz
loadaddr=0x81000000
script_addr=0x80900000
loadbootscript=fatload mmc 0 ${script_addr} boot.scr
bootscript= echo Running bootscript from MMC/SD to set the ENV...; source ${script_addr}
ethaddr=84:7e:40:7f:d1:38
ethact=DaVinci EMAC
bootcmd=nand read 0x81000000 0x00280000 0x296800; bootm 0x81000000
bootargs=mem=128M ddr_mem=1024M console=ttyO2,115200n8 root=/dev/mtdblock3 rw rootfstype=jffs2 ip=192.168.1.77:192.168.1.36:192.168.1.1:255.255.255.0::eth0:off vram=20M notifyk.vpssm3_sva=0xbfd00000
filesize=295F38
fileaddr=81000000
ipaddr=192.168.1.66
serverip=192.168.1.36
stdin=serial
stdout=serial
stderr=serial
ver=U-Boot 2010.06-dirty (Jul 01 2015 - 09:09:51)
Environment size: 755/131068 bytes
TI8168_EVM#boot
NAND read: device 0 offset 0x280000, size 0x296800
Skipping bad block 0x004c0000
2713600 bytes read: OK
## Booting kernel from Legacy Image at 81000000 ...
Image Name: Linux-2.6.37+
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 2711288 Bytes = 2.6 MiB
Load Address: 80008000
Entry Point: 80008000
Verifying Checksum ... OK
Loading Kernel Image ... OK
OK
Starting kernel ...
Uncompressing Linux... done, booting the kernel.
Linux version 2.6.37+ (root@ubuntu) (gcc version 4.3.3 (Sourcery G++ Lite 2009q1-203) ) #48 Thu Jul 2 09:48:57 HKT 2015
CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c53c7f
CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine: ti8168evm
vram size = 20971520 at 0x0
ti81xx_reserve: ### Reserved DDR region @87f00000
reserved size = 20971520 at 0x0
FB: Reserving 20971520 bytes SDRAM for VRAM
Memory policy: ECC disabled, Data cache writeback
OMAP chip is TI8168 2.0
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 27136
Kernel command line: mem=128M ddr_mem=1024M console=ttyO2,115200n8 root=/dev/mtdblock3 rw rootfstype=jffs2 ip=192.168.1.77:192.168.1.36:192.168.1.1:255.255.255.0::eth0:off vram=20M notifyk.vpssm3_sva=0xbfd00000
PID hash table entries: 512 (order: -1, 2048 bytes)
Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
Memory: 106MB 1MB = 107MB total
Memory: 102188k/102188k available, 28884k reserved, 0K highmem
Virtual kernel memory layout:
vector : 0xffff0000 - 0xffff1000 ( 4 kB)
fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)
DMA : 0xffc00000 - 0xffe00000 ( 2 MB)
vmalloc : 0xc8800000 - 0xf8000000 ( 760 MB)
lowmem : 0xc0000000 - 0xc8000000 ( 128 MB)
pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB)
modules : 0xbf000000 - 0xbfe00000 ( 14 MB)
.init : 0xc0008000 - 0xc0042000 ( 232 kB)
.text : 0xc0042000 - 0xc057e000 (5360 kB)
.data : 0xc057e000 - 0xc05d7440 ( 358 kB)
SLUB: Genslabs=11, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
NR_IRQS:407
IRQ: Found an INTC at 0xfa200000 (revision 5.0) with 128 interrupts
Total of 128 interrupts on 1 active controller
GPMC revision 6.0
Trying to install interrupt handler for IRQ400
Trying to install interrupt handler for IRQ401
Trying to install interrupt handler for IRQ402
Trying to install interrupt handler for IRQ403
Trying to install interrupt handler for IRQ404
Trying to install interrupt handler for IRQ405
Trying to install interrupt handler for IRQ406
Trying to install type control for IRQ407
Trying to set irq flags for IRQ407
OMAP clockevent source: GPTIMER1 at 27000000 Hz
Console: colour dummy device 80x30
Calibrating delay loop... 986.31 BogoMIPS (lpj=4931584)
pid_max: default: 32768 minimum: 301
Security Framework initialized
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
devtmpfs: initialized
TI81XX: Map 0x87f00000 to 0xfe500000 for dram barrier
TI81XX: Map 0x40300000 to 0xfe600000 for sram barrier
omap_voltage_early_init: voltage driver support not added
regulator: core version 0.5
regulator: dummy:
NET: Registered protocol family 16
omap_voltage_domain_lookup: Voltage driver init not yet happened.Faulting!
omap_voltage_add_dev: VDD specified does not exist!
OMAP GPIO hardware version 0.1
OMAP GPIO hardware version 0.1
ti8168_evm mode
HuanYi NVCT 4.2 Linux version 2.6.37+
omap_mux_init: Add partition: #1: core, flags: 0
_omap_mux_get_by_name: Could not find signal i2c2_scl.i2c2_scl
_omap_mux_get_by_name: Could not find signal i2c2_sda.i2c2_sda
registered ti816x_gpio_vr device
ti8168_evm init ok
registered ti816x_sr device
Cannot clk_get ck_32
pm_dbg_init: only OMAP3 supported
registered ti81xx_vpss device
registered ti81xx_vidout device
registered ti81xx on-chip HDMI device
registered ti81xx_fb device
registered ti81xx_vin device
ti81xx_pcie: Invoking PCI BIOS...
ti81xx_pcie: Setting up Host Controller...
ti81xx_pcie: Register base mapped @0xc8820000
ti81xx_pcie: Starting PCI scan...
PCI: bus0: Fast back to back transfers enabled
ti81xx_pcie: PCI scan done.
bio: create slab <bio-0> at 0
regulator: VFB: 800 <--> 1025 mV at 1025 mV
vgaarb: loaded
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
registerd cppi-dma Intr @ IRQ 17
Cppi41 Init Done
omap_i2c omap_i2c.1: bus 1 rev4.0 at 100 kHz
omap_i2c omap_i2c.2: bus 2 rev4.0 at 100 kHz
Advanced Linux Sound Architecture Driver Version 1.0.23.
Switching to clocksource gp timer
musb-hdrc: version 6.0, host, debug=0
musb-hdrc musb-hdrc.0: dma type: dma-cppi41
musb-hdrc musb-hdrc.0: MUSB HDRC host driver
musb-hdrc musb-hdrc.0: new USB bus registered, assigned bus number 1
usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb1: Product: MUSB HDRC host driver
usb usb1: Manufacturer: Linux 2.6.37+ musb-hcd
usb usb1: SerialNumber: musb-hdrc.0
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
musb-hdrc musb-hdrc.0: USB Host mode controller at c881e000 using DMA, IRQ 18
musb-hdrc musb-hdrc.1: dma type: dma-cppi41
musb-hdrc musb-hdrc.1: MUSB HDRC host driver
musb-hdrc musb-hdrc.1: new USB bus registered, assigned bus number 2
usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb2: Product: MUSB HDRC host driver
usb usb2: Manufacturer: Linux 2.6.37+ musb-hcd
usb usb2: SerialNumber: musb-hdrc.1
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 1 port detected
musb-hdrc musb-hdrc.1: USB Host mode controller at c8826800 using DMA, IRQ 19
NET: Registered protocol family 2
IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
TCP established hash table entries: 4096 (order: 3, 32768 bytes)
TCP bind hash table entries: 4096 (order: 2, 16384 bytes)
TCP: Hash tables configured (established 4096 bind 4096)
TCP reno registered
UDP hash table entries: 256 (order: 0, 4096 bytes)
UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
NET: Registered protocol family 1
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
NetWinder Floating Point Emulator V0.97 (double precision)
PMU: registered new PMU device of type 0
omap-iommu omap-iommu.0: ducati registered
omap-iommu omap-iommu.1: sys registered
JFFS2 version 2.2. (NAND) 漏 2001-2006 Red Hat, Inc.
msgmni has been set to 199
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
seed_gpio major#: 253, minor#: 0
Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
omap_uart.0: ttyO0 at MMIO 0x48020000 (irq = 72) is a OMAP UART0
omap_uart.1: ttyO1 at MMIO 0x48022000 (irq = 73) is a OMAP UART1
omap_uart.2: ttyO2 at MMIO 0x48024000 (irq = 74) is a OMAP UART2
console [ttyO2] enabled
brd: module loaded
loop: module loaded
ahci probe: devid name is ahci
ahci CAP register dump =0x6726ff81
Modified ahci CAP register dump =0x6f26ff81
ahci ahci.0: forcing PORTS_IMPL to 0x3
ahci: SSS flag set, parallel bus scan disabled
ahci ahci.0: AHCI 0001.0100 32 slots 2 ports 3 Gbps 0x3 impl platform mode
ahci ahci.0: flags: ncq sntf stag pm led clo only pmp pio slum part ccc
scsi0 : ahci_platform
scsi1 : ahci_platform
ata1: SATA max UDMA/133 irq_stat 0x00000040, connection status changed irq 16
ata2: SATA max UDMA/133 mmio [mem 0x4a140000-0x4a150fff] port 0x180 irq 16
omap2-nand driver initializing
----------omap2-nand driver initializing over--------
-------------nand_flash_dev------------
nand_get_flash_type: maf_id is ff, dev_id is ff
nand_get_flash_type: second ID read is ff,ff
-------------return ERR_PTR------------
davinci_mdio davinci_mdio.0: davinci mdio revision 1.6
davinci_mdio davinci_mdio.0: detected phy mask fffffffd
davinci_mdio.0: probed
davinci_mdio davinci_mdio.0: phy[1]: device 0:01, driver unknown
PPP generic driver version 2.4.2
PPP Deflate Compression module registered
PPP BSD Compression module registered
usbcore: registered new interface driver dm9601
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
usbcore: registered new interface driver usbserial
USB Serial support registered for generic
usb 1-1: new high speed USB device using musb-hdrc and address 2
usb 1-1: New USB device found, idVendor=12d1, idProduct=1573
usb 1-1: New USB device strings: Mfr=5, Product=4, SerialNumber=0
usb 1-1: Product: HUAWEI Mobile
usb 1-1: Manufacturer: Huawei Technologies
usbcore: registered new interface driver usbserial_generic
usbserial: USB Serial Driver core
USB Serial support registered for GSM modem (1-port)
option 1-1:2.2: GSM modem (1-port) converter detected
usb 1-1: GSM modem (1-port) converter now attached to ttyUSB0
option 1-1:2.3: GSM modem (1-port) converter detected
usb 1-1: GSM modem (1-port) converter now attached to ttyUSB1
option 1-1:2.4: GSM modem (1-port) converter detected
usb 1-1: GSM modem (1-port) converter now attached to ttyUSB2
option 1-1:2.5: GSM modem (1-port) converter detected
usb 1-1: GSM modem (1-port) converter now attached to ttyUSB3
option 1-1:2.6: GSM modem (1-port) converter detected
usb 1-1: GSM modem (1-port) converter now attached to ttyUSB4
usbcore: registered new interface driver option
option: v0.7.2:USB Driver for GSM modems
mice: PS/2 mouse device common for all mice
rtc-ds1307 1-0068: rtc core: registered ds1337 as rtc0
omap_rtc omap_rtc: rtc core: registered omap_rtc as rtc1
i2c /dev entries driver
Linux video capture interface: v2.00
usbcore: registered new interface driver uvcvideo
USB Video Class driver (v1.0.0)
OMAP Watchdog Timer Rev 0x00: initial timeout 60 sec
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
notify_init : notify drivercreated for remote proc id 2 at physical Address 0xbfd00000
Asahi Kasei AK4104 ALSA SoC Codec Driver
Cirrus Logic CS4270 ALSA SoC Codec Driver
Registered tvp5158 audio codec
asoc: tlv320aic3x-hifi <-> davinci-mcasp.2 mapping ok
asoc: HDMI-DAI-CODEC <-> hdmi-dai mapping ok
ALSA device list:
#0: TI81XX SOUND0
#1: TI81XX SOUND1
TCP cubic registered
NET: Registered protocol family 17
VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3
omap_voltage_late_init: Voltage driver support not added
Power Management for TI81XX.
smartreflex smartreflex: Driver initialized
rtc-ds1307 1-0068: setting system clock to 2000-04-11 05:52:38 UTC (955432358)
mmc0: new high speed SDHC card at address 1234
mmcblk0: mmc0:1234 SA04G 3.63 GiB (ro)
mmcblk0: p1 p2
davinci_mdio davinci_mdio.0: resetting idled controller
net eth0: attached PHY driver [Generic PHY] (mii_bus:phy_addr=0:01, id=282f014)
IP-Config: Complete:
device=eth0, addr=192.168.1.77, mask=255.255.255.0, gw=192.168.1.1,
host=192.168.1.77, domain=, nis-domain=(none),
bootserver=192.168.1.36, rootserver=192.168.1.36, rootpath=
ata1: softreset failed (device not ready)
ata1: softreset failed (device not ready)
ata1: link is slow to respond, please be patient (ready=0)
ata1: softreset failed (device not ready)
ata1: limiting SATA link speed to 1.5 Gbps
ata1: softreset failed (device not ready)
ata1: reset failed, giving up
ata2: SATA link down (SStatus 0 SControl 300)
VFS: Unable to mount root fs via NFS, trying floppy.
List of all partitions:
b300 3813376 mmcblk0 driver: mmcblk
b301 72261 mmcblk0p1 00000000-0000-0000-0000-000000000mmcblk0p1
b302 3735112 mmcblk0p2 00000000-0000-0000-0000-000000000mmcblk0p2
No filesystem could mount root, tried: jffs2
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
Backtrace:
[<c0050bdc>] (dump_backtrace+0x0/0x110) from [<c03ca570>] (dump_stack+0x18/0x1c)
r7:c5c00000 r6:c007a248 r5:c0030a4c r4:c05d8050
[<c03ca558>] (dump_stack+0x0/0x1c) from [<c03ca5d4>] (panic+0x60/0x17c)
[<c03ca574>] (panic+0x0/0x17c) from [<c00092b4>] (mount_block_root+0x1e0/0x220)
r3:00000000 r2:00000020 r1:c6429f58 r0:c04f42ec
[<c00090d4>] (mount_block_root+0x0/0x220) from [<c00093a0>] (mount_root+0xac/0xcc)
[<c00092f4>] (mount_root+0x0/0xcc) from [<c0009530>] (prepare_namespace+0x170/0x1d4)
r4:c05d74a4
[<c00093c0>] (prepare_namespace+0x0/0x1d4) from [<c00087c4>] (kernel_init+0x114/0x154)
r5:c00086b0 r4:c05d7440
[<c00086b0>] (kernel_init+0x0/0x154) from [<c007a248>] (do_exit+0x0/0x5e4)
r5:c00086b0 r4:00000000
我对比了两个版本的开发包中uboot代码中nand部分的差异，也没发现有什么可以更改的地方，还请大家帮忙看看，谢谢！