| 发表于：2007-05-13 18:49:29 楼主 |
向各位高手请教，最近我移植了linux-2.6.20（+2.6.20-at91.patch)到at91rm9200的板子上，在usb口上插上u盘可用，信息如下：
usb 1-1: new full speed usb device using at91_ohci and address 11
usb 1-1: configuration #1 chosen from 1 choice
scsi0 : scsi emulation for usb mass storage devices
scsi 0:0:0:0: direct-access usb flash disk 2.00 pq: 0 ansi: 2
scsi device sda: 509376 512-byte hdwr sectors （261 mb)
sda: write protect is off
sda: assuming drive cache: write through
scsi device sda: 509376 512-byte hdwr sectors （261 mb)
sda: write protect is off
sda: assuming drive cache: write through
sda: sda1
sd 0:0:0:0: attached scsi removable disk sda
说明usb口上插入u盘时可以用的。
在usb口上插入usb hub 提示信息如下：
# usb 1-1: new full speed usb device using at91_ohci and address 6
usb 1-1: configuration #1 chosen from 1 choice
hub 1-1:1.0: usb hub found
hub 1-1:1.0: 4 ports detected
说明系统检测到了usb hub
但是在usb hub上插上u盘过后出现信息如下：
usb 1-1.2: new full speed usb device using at91_ohci and address 7
usb 1-1.2: device descriptor read/64, error -62
usb 1-1.2: device descriptor read/64, error -62
usb 1-1.2: new full speed usb device using at91_ohci and address 8
usb 1-1.2: device descriptor read/64, error -62
usb 1-1.2: device descriptor read/64, error -62
usb 1-1.2: new full speed usb device using at91_ohci and address 9
usb 1-1.2: device not accepting address 9, error -62
usb 1-1.2: new full speed usb device using at91_ohci and address 10
usb 1-1.2: device not accepting address 10, error -62
我在asm-generic/errno.h中 error -62 为：
#define etime 62 /* timer expired */
在documentation/usb/error-codes.txt
-etime （**) no response packet received within the prescribed
bus turn-around time. this error may instead be
reported as -eproto or -eilseq.
请各路高手帮我分析一下，到底是什么原因？不胜感激。
其他的2.6的内核也试过了，也出现同样的问题。 |
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