硬件参照dm8127ipnc设计的，把dm8127做为usb的host，外接u盘，内核配置如下
系统起来后，插入u盘，u盘指示灯是亮的，其他没有反应，内核有关usb信息如下：
root@dm8127-evm:~# dmesg | grep usb
musb-hdrc: version 6.0, host, debug=0
musb-hdrc musb-hdrc.0: dma type: dma-cppi41
PM: Adding info for platform:nop_usb_xceiv.0
usb2phy: computed values rxcalib(15)DACs(35 12 14)
usb2phy: override computed values rxcalib(15)DACs(35 12 14)
usb2phy_config: musb(0) rxcalib done, rxcalib read value 6f71d976
musb-hdrc: ConfigData=0xde (UTMI-8, dyn FIFOs, bulk combine, bulk split, HB-ISO Rx, HB-ISO Tx, SoftConn)
musb-hdrc: MHDRC RTL version 2.0
musb-hdrc: setup fifo_mode 4
musb-hdrc: 28/31 max ep, 16384/16384 memory
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_DM8127_IPNC_3.80.00 musb-hcd
usb usb1: SerialNumber: musb-hdrc.0
PM: Adding info for usb:usb1
PM: Adding info for usb:1-0:1.0
PM: Adding info for No Bus:usbdev1.1
musb-hdrc musb-hdrc.0: USB Host mode controller at c581e000 using DMA, IRQ 18
Registered /proc/driver/musb_hdrc.0
musb-hdrc musb-hdrc.1: dma type: dma-cppi41
PM: Adding info for platform:nop_usb_xceiv.1
usb2phy: computed values rxcalib(15)DACs(31 16 17)
usb2phy: override computed values rxcalib(15)DACs(31 16 17)
usb2phy_config: musb(1) rxcalib done, rxcalib read value 6f6fe18e
musb-hdrc: ConfigData=0xde (UTMI-8, dyn FIFOs, bulk combine, bulk split, HB-ISO Rx, HB-ISO Tx, SoftConn)
musb-hdrc: MHDRC RTL version 2.0
musb-hdrc: setup fifo_mode 4
musb-hdrc: 28/31 max ep, 16384/16384 memory
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_DM8127_IPNC_3.80.00 musb-hcd
usb usb2: SerialNumber: musb-hdrc.1
PM: Adding info for usb:usb2
PM: Adding info for usb:2-0:1.0
PM: Adding info for No Bus:usbdev2.1
musb-hdrc musb-hdrc.1: USB Host mode controller at c5828800 using DMA, IRQ 19
Registered /proc/driver/musb_hdrc.1
usbcore: registered new interface driver usb-storage
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
系统打印信息如下：
NAND read: device 0 offset 0x1c0000, size 0x400000
4194304 bytes read: OK
## Booting kernel from Legacy Image at 81000000 ...
Image Name: Linux-2.6.37_DM8127_IPNC_3.80.00
Created: 2017-09-20 10:18:24 UTC
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 2707464 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_DM8127_IPNC_3.80.00 (root@davinci) (gcc version 4.5.3 20110311 (prerelease) (GCC) ) #1 Wed Sep 20 18:18:20 CST 2017
CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c53c7f
CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine: ti8148ipnc
vram size = 4194304 at 0x0
bootconsole [earlycon0] enabled
ti81xx_reserve: ### Reserved DDR region @84f00000
reserved size = 4194304 at 0x0
FB: Reserving 4194304 bytes SDRAM for VRAM
Memory policy: ECC disabled, Data cache writeback
OMAP chip is TI8148 2.1
SRAM: Mapped pa 0x402f1000 to va 0xfe400000 size: 0xf000
Built 1 zonelists in Zone order, mobility grouping on. Total pages: 19040
Kernel command line: console=ttyO0,115200n8 lpj=4997120 mem=80M notifyk.vpssm3_sva=0xBFD00000 vram=4M cmemk.phys_start=0x85000000 cmemk.phys_end=0x89000000 cmemk.allowOverlap=1 earlyprintk ip=dhcp eth=00:11:22:33:44:66 root=/dev/nfs rw nfsroot=192.168.1.251:/home/davinci/dm8127/v3.8.0/Source/ipnc_rdk/target/filesys,nolock mac=00:11:22:33:44:66
cpsw: kernel boot params Ethernet address: 00:11:22:33:44:66
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: 74MB 1MB = 75MB total
Memory: 70224k/70224k available, 11696k reserved, 0K highmem
Virtual kernel memory layout:
vector : 0xffff0000 - 0xffff1000 ( 4 kB)
fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)
DMA : 0xffc00000 - 0xffe00000 ( 2 MB)
vmalloc : 0xc5800000 - 0xf8000000 ( 808 MB)
lowmem : 0xc0000000 - 0xc5000000 ( 80 MB)
pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB)
modules : 0xbf000000 - 0xbfe00000 ( 14 MB)
.init : 0xc0008000 - 0xc003f000 ( 220 kB)
.text : 0xc003f000 - 0xc0528000 (5028 kB)
.data : 0xc0528000 - 0xc056cb40 ( 275 kB)
SLUB: Genslabs=11, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
NR_IRQS:375
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 IRQ368
Trying to install interrupt handler for IRQ369
Trying to install interrupt handler for IRQ370
Trying to install interrupt handler for IRQ371
Trying to install interrupt handler for IRQ372
Trying to install interrupt handler for IRQ373
Trying to install interrupt handler for IRQ374
Trying to install type control for IRQ375
Trying to set irq flags for IRQ375
OMAP clockevent source: GPTIMER1 at 20000000 Hz
Console: colour dummy device 80x30
Calibrating delay loop (skipped) preset value.. 999.42 BogoMIPS (lpj=4997120)
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 0x84f00000 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
OMAP GPIO hardware version 0.1
OMAP GPIO hardware version 0.1
omap_mux_init: Add partition: #1: core, flags: 4
TY: gpio mux_init in board-ti8148ipnc.c
Cannot clk_get ck_32
Debugfs: Only enabling/disabling deep sleep and wakeup timer is supported now
registered ti81xx_vpss device
registered ti81xx_vidout device
registered ti81xx on-chip HDMI device
registered ti81xx_fb device
PWM0 init success.
PWM1 init success.
bio: create slab <bio-0> at 0
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
USBSS revision 4ea2080b
registerd cppi-dma Intr @ IRQ 17
Cppi41 Init Done
omap_i2c omap_i2c.1: bus 1 rev4.0 at 100 kHz
regulator: VRTC: 1800 mV
regulator: VIO: 1500 mV
regulator: VDD1: 600 <--> 1500 mV at 1350 mV
regulator: VDD2: 600 <--> 1500 mV at 1350 mV
regulator: VDDCTRL: 600 <--> 1400 mV at 1350 mV
regulator: LDO1: 1100 <--> 3300 mV at 1800 mV
regulator: LDO2: 1100 <--> 3300 mV at 1800 mV
regulator: LDO3: 1100 <--> 3300 mV at 3300 mV
regulator: LDO4: 1100 <--> 3300 mV at 1800 mV
regulator: LDO5: 1100 <--> 3300 mV at 3300 mV
regulator: LDO6: 1100 <--> 3300 mV at 3300 mV
regulator: LDO7: 1100 <--> 3300 mV at 3300 mV
regulator: LDO8: 1100 <--> 3300 mV at 1800 mV
tps65911-rtc tps65911-rtc: rtc core: registered tps65911-rtc as rtc0
tps65910 1-002d: No interrupt support, no core IRQ
omap_i2c omap_i2c.3: bus 3 rev4.0 at 400 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 controller-0 revision 4ea20800
usb2phy: computed values rxcalib(15)DACs(35 12 14)
usb2phy: override computed values rxcalib(15)DACs(35 12 14)
usb2phy_config: musb(0) rxcalib done, rxcalib read value 6f71d976
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_DM8127_IPNC_3.80.00 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 c581e000 using DMA, IRQ 18
musb-hdrc musb-hdrc.1: dma type: dma-cppi41
MUSB controller-1 revision 4ea20800
usb2phy: computed values rxcalib(15)DACs(31 16 17)
usb2phy: override computed values rxcalib(15)DACs(31 16 17)
usb2phy_config: musb(1) rxcalib done, rxcalib read value 6f6fe18e
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_DM8127_IPNC_3.80.00 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 c5828800 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
squashfs: version 4.0 (2009/01/31) Phillip Lougher
NTFS driver 2.1.29 [Flags: R/W].
JFFS2 version 2.2. (NAND) 漏 2001-2006 Red Hat, Inc.
msgmni has been set to 137
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
CMEMK module: built on Sep 20 2017 at 18:13:14
Reference Linux version 2.6.37
File /home/davinci/dm8127/v3.8.0/Source/ti_tools/linuxutils_3_23_00_01/packages/ti/sdo/linuxutils/cmem/src/module/cmemk.c
allocated heap buffer 0xc7000000 of size 0x4000000
cmemk initialized
DM8127 user gpio init ok.
Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
omap_uart.0: ttyO0 at MMIO 0x48020000 (irq = 72) is a OMAP UART0
console [ttyO0] enabled, bootconsole disabled
console [ttyO0] enabled, bootconsole disabled
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
omap_uart.3: ttyO3 at MMIO 0x481a6000 (irq = 44) is a OMAP UART3
omap_uart.4: ttyO4 at MMIO 0x481a8000 (irq = 45) is a OMAP UART4
omap_uart.5: ttyO5 at MMIO 0x481aa000 (irq = 46) is a OMAP UART5
brd: module loaded
loop: module loaded
omap2-nand driver initializing
NAND device: Manufacturer ID: 0xec, Chip ID: 0xdc (Samsung )
omap2-nand: detected x8 NAND flash
Creating 8 MTD partitions on "omap2-nand.0":
0x000000000000-0x000000020000 : "U-Boot-min"
0x000000020000-0x000000180000 : "U-Boot"
0x000000180000-0x0000001c0000 : "U-Boot Env"
0x0000001c0000-0x000000800000 : "Kernel"
0x000000800000-0x000002b00000 : "Basefs"
0x000002b00000-0x000009900000 : "ubifs"
0x000009900000-0x00000e900000 : "userapp"
0x00000e900000-0x000020000000 : "user data"
davinci_mdio davinci_mdio.0: davinci mdio revision 1.6
davinci_mdio davinci_mdio.0: detected phy mask fffffffe
davinci_mdio.0: probed
davinci_mdio davinci_mdio.0: phy[0]: device 0:00, driver unknown
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
mice: PS/2 mouse device common for all mice
i2c /dev entries driver
Linux video capture interface: v2.00
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
cm: Module associated with clock hdmi_i2s_fck didn't enable in 100000 tries
asoc: tlv320aic3x-hifi <-> davinci-mcasp.2 mapping ok
asoc: HDMI-DAI-CODEC <-> hdmi-dai mapping ok
ALSA device list:
#0: TI8148 IPNC
nf_conntrack version 0.5.0 (1097 buckets, 4388 max)
ip_tables: (C) 2000-2006 Netfilter Core Team
TCP cubic registered
NET: Registered protocol family 17
NET: Registered protocol family 15
Bridge firewalling registered
lib80211: common routines for IEEE802.11 drivers
Registering the dns_resolver key type
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.
Detected MACID=0:11:22:33:44:66
tps65911-rtc tps65911-rtc: setting system clock to 2000-01-01 00:00:43 UTC (946684843)
CPSW phy found : id is : 0x4dd074
PHY 0:01 not found
Sending DHCP requests .
PHY: 0:00 - Link is Up - 100/Full
., OK
IP-Config: Got DHCP answer from 192.168.1.1, my address is 192.168.1.65
IP-Config: Complete:
device=eth0, addr=192.168.1.65, mask=255.255.255.0, gw=192.168.1.1,
host=192.168.1.65, domain=, nis-domain=(none),
bootserver=192.168.1.1, rootserver=192.168.1.251, rootpath=
VFS: Mounted root (nfs filesystem) on device 0:14.
devtmpfs: mounted
Freeing init memory: 220K
INIT: version 2.86 booting
Please wait: booting...
Starting udev
Root filesystem already rw, not remounting
Caching udev devnodes
root: mount: mounting /dev/root on / failed: No such file or directory
NOT configuring network interfaces: / is an NFS mount
rm: cannot remove '/tmp': Device or resource busy
Thu Nov 29 09:10:00 GMT-8 2012
inside finish.sh
UBI: attaching mtd6 to ubi0
UBI: physical eraseblock size: 131072 bytes (128 KiB)
UBI: logical eraseblock size: 126976 bytes
UBI: smallest flash I/O unit: 2048
UBI: sub-page size: 512
UBI: VID header offset: 2048 (aligned 2048)
UBI: data offset: 4096
UBI: max. sequence number: 42
UBI: attached mtd6 to ubi0
UBI: MTD device name: "userapp"
UBI: MTD device size: 80 MiB
UBI: number of good PEBs: 640
UBI: number of bad PEBs: 0
UBI: number of corrupted PEBs: 0
UBI: max. allowed volumes: 128
UBI: wear-leveling threshold: 4096
UBI: number of internal volumes: 1
UBI: number of user volumes: 1
UBI: available PEBs: 0
UBI: total number of reserved PEBs: 640
UBI: number of PEBs reserved for bad PEB handling: 6
UBI: max/mean erase counter: 2/0
UBI: image sequence number: 1577342759
UBI: background thread "ubi_bgt0d" started, PID 268
INIT: Entering runlevel: 5 640 LEBs (81264640 bytes, 77.5 MiB), available 0 LEBs
Starting telnet daemon.
Starting syslogd/klogd: done
问题怎么定位？或者哪里还需要配置，ti专家和弄过的大神们给点建议。谢谢~
