USB设备无法识别
本帖最后由 thzhr2009 于 2013-07-17 16:33 编辑板子CPU：s3c2416
linux：2.6.21
目前正在调板子的USB DEVICE驱动，现在板子加载驱动模块g_file_storage.ko成功，在加载驱动后PC也可检测到设备，但是无法识别，以下为使用抓包软件bus hound在PC上抓取到的插入板子时的数据交互过程：
21.0 URB 50 00 08 0000 00 00 00CONTROL TRANSFER 5us 3.3.0 2013-07-1714:52:16.004
21 IRP 06 00 90 0100 00 00 00 10us 3.4.0 2013-07-1714:52:16.004
21.0 CTL 23 01 10 0003 00 00 00CLEAR FEATURE 13us 4.1.0 2013-07-1714:52:16.004usbhub
21.0 URB 50 00 08 0000 00 00 00CONTROL TRANSFER228us 4.2.0 2013-07-1714:52:16.004
21 IRP 06 00 90 0100 00 00 00 3us 4.3.0 2013-07-1714:52:16.004
21.0 CTL a3 00 00 0001 00 04 00GET STATUS 58us 5.1.0 2013-07-1714:52:16.004usbhub
21.0 4IN 00 01 00 00 .... 304us 5.2.0 2013-07-1714:52:16.004
21.0 URB 50 00 08 0000 00 00 00CONTROL TRANSFER 3us 5.3.0 2013-07-1714:52:16.004
21 IRP 06 00 90 0100 00 00 00 1us 5.4.0 2013-07-1714:52:16.004
21.0 CTL a3 00 00 0002 00 04 00GET STATUS 35us 6.1.0 2013-07-1714:52:16.004usbhub
21.0 4IN 00 01 00 00 .... 237us 6.2.0 2013-07-1714:52:16.004
21.0 URB 50 00 08 0000 00 00 00CONTROL TRANSFER 11us 6.3.0 2013-07-1714:52:16.004
21 IRP 06 00 90 0100 00 00 00 1us 6.4.0 2013-07-1714:52:16.004
21.0 CTL a3 00 00 0003 00 04 00GET STATUS 35us 7.1.0(2) 2013-07-1714:52:16.004usbhub
21.0 4IN 01 01 00 00 .... 172us 7.2.0 2013-07-1714:52:16.004
21.0 URB 50 00 08 0000 00 00 00CONTROL TRANSFER 4us 7.3.0 2013-07-1714:52:16.004
21 IRP 06 00 90 0100 00 00 00 9us 7.4.0 2013-07-1714:52:16.004
21.0 CTL 23 03 04 0003 00 00 00 SET FEATURE 115ms 9.1.0 2013-07-1714:52:16.128usbhub
21.0 URB 50 00 08 0000 00 00 00CONTROL TRANSFER204us 9.2.0 2013-07-1714:52:16.128
21 IRP 06 00 90 0100 00 00 00 3us 9.3.0 2013-07-1714:52:16.128
21.1 1IN 08 . 14ms 10.1.0 2013-07-1714:52:16.144usbhub
21.1 URB 48 00 09 0000 00 00 00BULK/INT XFER 5us 10.2.0 2013-07-1714:52:16.144
21 IRP 06 00 00 0100 00 00 00 1us 10.3.0 2013-07-1714:52:16.144
请问下是什么问题，请高手指点下。 目前排查到在/driver/usb/gadget/s3c-udc-hs.c中函数reconfig_usbd.c中有问题，该函数主要完成USB寄存器配置，原函数中使用__raw_writel完成寄存器配置，但加载驱动时会报段错误，将该函数置为空就可加载。排查发现时对寄存器操作应使用虚拟地址，原来使用物理地址，因此我使用ioremap结合iowrite32进行配置，或者ioremap结合__raw_writel操作，但仍然报段错误，无论对哪个寄存器操作，请问这怎么回事.
我的操作如下：
volatile unsigned long phys;
volatile unsigned long virt;
phys=0x49800000;
virt=(unsigned long)ioremap(phys,0x10);
//__raw_writel(0x04,*(unsigned long *)(virt+0x14));
iowrite32(0x04,*(unsigned long *)(virt+0x14));
iowrite32(0x07,*(unsigned long *)(virt+0x08));
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