WR841N V3的USB不能挂载

zx***

USB加5V电源，R96接4.7K电阻，RAM已升到64M，上支持USB的固件。发现插上USB，无任何信息，请高手指点问题原因。
启动信息如下：
[    0.000000] Linux version 3.3.8 (haxc@haxc--pc) (gcc version 4.6.3 20120201 (prerelease) (Linaro GCC 4.6-2012.02) ) #2 Sun Sep 29 10:54:26 CST 2013
[    0.000000] MyLoader: sysp=11402000, boardp=00001040, parts=08000100
[    0.000000] bootconsole [early0] enabled
[    0.000000] CPU revision is: 00019374 (MIPS 24Kc)
[    0.000000] SoC: Atheros AR9130 rev 2
[    0.000000] Clocks: CPU:400.000MHz, DDR:400.000MHz, AHB:100.000MHz, Ref:5.000MHz
[    0.000000] Determined physical RAM map:
[    0.000000]  memory: 04000000 @ 00000000 (usable)
[    0.000000] Initrd not found or empty - disabling initrd
[    0.000000] Zone PFN ranges:
[    0.000000]   Normal   0x00000000 -> 0x00004000
[    0.000000] Movable zone start PFN for each node
[    0.000000] Early memory PFN ranges
[    0.000000]     0: 0x00000000 -> 0x00004000
[    0.000000] On node 0 totalpages: 16384
[    0.000000] free_area_init_node: node 0, pgdat 802e6270, node_mem_map 81000000
[    0.000000]   Normal zone: 128 pages used for memmap
[    0.000000]   Normal zone: 0 pages reserved
[    0.000000]   Normal zone: 16256 pages, LIFO batch:3
[    0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[    0.000000] pcpu-alloc: [0] 0
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 16256
[    0.000000] Kernel command line:  board=TL-WR941ND console=ttyS0,115200 rootfstype=squashfs,jffs2 noinitrd
[    0.000000] PID hash table entries: 256 (order: -2, 1024 bytes)
[    0.000000] Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
[    0.000000] Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
[    0.000000] Primary instruction cache 64kB, VIPT, 4-way, linesize 32 bytes.
[    0.000000] Primary data cache 32kB, 4-way, VIPT, cache aliases, linesize 32 bytes
[    0.000000] Writing ErrCtl register=00000000
[    0.000000] Readback ErrCtl register=00000000
[    0.000000] Memory: 61532k/65536k available (2173k kernel code, 4004k reserved, 412k data, 212k init, 0k highmem)
[    0.000000] SLUB: Genslabs=9, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] NR_IRQS:51
[    0.000000] Calibrating delay loop... 265.42 BogoMIPS (lpj=1327104)
[    0.100000] pid_max: default: 32768 minimum: 301
[    0.110000] Mount-cache hash table entries: 512
[    0.120000] NET: Registered protocol family 16
[    0.130000] gpiochip_add: registered GPIOs 0 to 21 on device: ath79
[    0.140000] MIPS: machine is TP-LINK TL-WR941ND
[    0.410000] bio: create slab <bio-0> at 0
[    0.420000] Switching to clocksource MIPS
[    0.430000] NET: Registered protocol family 2
[    0.480000] IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.560000] TCP established hash table entries: 2048 (order: 2, 16384 bytes)
[    0.650000] TCP bind hash table entries: 2048 (order: 1, 8192 bytes)
[    0.720000] TCP: Hash tables configured (established 2048 bind 2048)
[    0.800000] TCP reno registered
[    0.840000] UDP hash table entries: 256 (order: 0, 4096 bytes)
[    0.910000] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[    0.980000] NET: Registered protocol family 1
[    1.030000] PCI: CLS 0 bytes, default 32
[    1.050000] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[    1.120000] JFFS2 version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY) (c) 2001-2006 Red Hat, Inc.
[    1.240000] msgmni has been set to 120
[    1.280000] io scheduler noop registered
[    1.330000] io scheduler deadline registered (default)
[    1.390000] Serial: 8250/16550 driver, 1 ports, IRQ sharing disabled
[    1.490000] serial8250.0: ttyS0 at MMIO 0x18020000 (irq = 11) is a 16550A
[    1.570000] console [ttyS0] enabled, bootconsole disabled
[    1.580000] m25p80 spi0.0: found 320s33b, expected m25p80
[    1.590000] m25p80 spi0.0: 320s33b (4096 Kbytes)
[    1.590000] 6 tp-link partitions found on MTD device spi0.0
[    1.600000] Creating 6 MTD partitions on "spi0.0":
[    1.600000] 0x000000000000-0x000000020000 : "u-boot"
[    1.610000] 0x000000020000-0x000000108c00 : "kernel"
[    1.610000] mtd: partition "kernel" must either start or end on erase block boundary or be smaller than an erase block -- forcing read-only
[    1.630000] 0x000000108c00-0x0000003f0000 : "rootfs"
[    1.630000] mtd: partition "rootfs" must either start or end on erase block boundary or be smaller than an erase block -- forcing read-only
[    1.650000] mtd: partition "rootfs" set to be root filesystem
[    1.650000] mtd: partition "rootfs_data" created automatically, ofs=390000, len=60000
[    1.660000] 0x000000390000-0x0000003f0000 : "rootfs_data"
[    1.670000] 0x0000003f0000-0x000000400000 : "art"
[    1.670000] 0x000000020000-0x0000003f0000 : "firmware"
[    1.680000] 0x000000000000-0x000000400000 : "fullflash"
[    1.700000] ag71xx_mdio: probed
[    1.710000] eth0: Atheros AG71xx at 0xb9000000, irq 4
[    2.010000] TCP cubic registered
[    2.020000] NET: Registered protocol family 17
[    2.020000] Distributed Switch Architecture driver version 0.1
[    2.030000] eth0[0]: detected a Marvell 88E6060 switch
[    2.050000] dsa slave smi: probed
[    2.060000] 8021q: 802.1Q VLAN Support v1.8
[    2.080000] VFS: Mounted root (squashfs filesystem) readonly on device 31:2.
[    2.090000] Freeing unused kernel memory: 212k freed
[    6.000000] ar71xx: pll_reg 0xb8050014: 0x13000a44
[    6.000000] eth0: link up (100Mbps/Full duplex)
[    6.310000] Registered led device: tp-link:green:system
[    6.310000] Registered led device: tp-link:red:qss
[    6.310000] Registered led device: tp-link:green:qss
[    6.310000] Registered led device: tp-link:green:wlan
[    9.770000] JFFS2 notice: (502) jffs2_build_xattr_subsystem: complete building xattr subsystem, 2 of xdatum (1 unchecked, 1 orphan) and 42 of xref (0 dead, 24 orphan) found.
[   10.710000] SCSI subsystem initialized
[   11.030000] usbcore: registered new interface driver usbfs
[   11.040000] usbcore: registered new interface driver hub
[   11.040000] usbcore: registered new device driver usb
[   11.630000] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[   11.640000] ehci-platform ehci-platform: Generic Platform EHCI Controller
[   11.650000] ehci-platform ehci-platform: new USB bus registered, assigned bus number 1
[   11.690000] ehci-platform ehci-platform: irq 3, io mem 0x1b000000
[   11.710000] ehci-platform ehci-platform: USB 2.0 started, EHCI 1.00
[   11.710000] hub 1-0:1.0: USB hub found
[   11.720000] hub 1-0:1.0: 1 port detected
[   11.730000] Initializing USB Mass Storage driver...
[   11.740000] usbcore: registered new interface driver usb-storage
[   11.750000] USB Mass Storage support registered.
[   32.070000] eth0: link down
[   34.480000] Loading modules backported from Linux version master-2013-06-27-0-gdcfa6d5
[   34.490000] Backport generated by backports.git backports-20130617-4-ge3220f5
[   34.800000] cfg80211: Calling CRDA to update world regulatory domain
[   34.800000] cfg80211: World regulatory domain updated:
[   34.810000] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[   34.820000] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[   34.830000] cfg80211:   (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[   34.830000] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
[   34.840000] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[   34.850000] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[   36.350000] ath: EEPROM regdomain: 0x809c
[   36.350000] ath: EEPROM indicates we should expect a country code
[   36.350000] ath: doing EEPROM country->regdmn map search
[   36.350000] ath: country maps to regdmn code: 0x52
[   36.350000] ath: Country alpha2 being used: CN
[   36.350000] ath: Regpair used: 0x52
[   36.350000] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
[   36.360000] ieee80211 phy0: Atheros AR9100 MAC/BB Rev:7 AR2122 RF Rev:a2 mem=0xb80c0000, irq=2
[   36.370000] cfg80211: Calling CRDA for country: CN
[   36.370000] cfg80211: Regulatory domain changed to country: CN
[   36.380000] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[   36.390000] cfg80211:   (2402000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm)
[   36.390000] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (N/A, 3000 mBm)
[   36.530000] PPP generic driver version 2.4.2
[   36.880000] ip_tables: (C) 2000-2006 Netfilter Core Team
[   37.090000] NET: Registered protocol family 24
[   37.150000] nf_conntrack version 0.5.0 (964 buckets, 3856 max)
[   37.540000] xt_time: kernel timezone is -0000
[   38.140000] usbcore: registered new interface driver usblp
[   38.280000] usbcore: registered new interface driver ums-alauda
[   38.300000] usbcore: registered new interface driver ums-cypress
[   38.330000] usbcore: registered new interface driver ums-datafab
[   38.350000] usbcore: registered new interface driver ums-freecom
[   38.370000] usbcore: registered new interface driver ums-isd200
[   38.390000] usbcore: registered new interface driver ums-jumpshot
[   38.410000] usbcore: registered new interface driver ums-karma
[   38.440000] usbcore: registered new interface driver ums-sddr09
[   38.460000] usbcore: registered new interface driver ums-sddr55
[   38.480000] usbcore: registered new interface driver ums-usbat
[   38.530000] usbcore: registered new interface driver usbhid
[   38.540000] usbhid: USB HID core driver
[   43.520000] ar71xx: pll_reg 0xb8050014: 0x13000a44
[   43.520000] eth0: link up (100Mbps/Full duplex)
[   43.530000] device lan1 entered promiscuous mode
[   43.530000] device eth0 entered promiscuous mode
[   43.550000] device lan2 entered promiscuous mode
[   43.600000] device lan3 entered promiscuous mode
[   43.610000] device lan4 entered promiscuous mode
[   44.040000] wan: link up, 100 Mb/s, full duplex, flow control disabled

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另外lsusb信息：
# lsusb
Bus 001 Device 001: ID 1d6b:0002

zx***

USB需要u-boot支持吗？

fengl***

841V3 16M  64M USB,带电源  70包邮