Hello. I'm making custom version of u-boot for our device, based on 1.1.6. I can't get usb storage to work. My usb host successfully gets initiated, finds storage device, and fails to connect it. The problem probably is on SCSI commands level. In usb storage driver(file common/usb_storage.c), there is the function usb_stor_get_info(). It sends different SCSI commands. I got the following things. Inquiry command passes well. In the source version, there was test_unit_ready command, that failed every time. I've tried to place it before inquiry, and i also have tried to place request_sense before them all. These commands failed, and caused device to disconnect, so no more commands can be passed. What can be problem, that makes these commands fail? Usb flash stick works good with Linux.
Here is some debug output.
Test unit ready:
COMMAND phase cbw.dCBWSignature == 43425355 CBWSIGNATURE==43425355 td->hwBE == 33fffda6 td->hwCBP == 33fffd88 td->hwNextTD == 33e55580 STATUS phase td->hwBE == 33fffde8 td->hwCBP == 33fffddc td->hwNextTD == 33e555c0 dCSWSignature == 53425355 dCSWTag == 0 dCSWDataResidue == 0 bCSWStatus == 1 ptr[0] 0x55 ptr[1] 0x53 ptr[2] 0x42 ptr[3] 0x53 ptr[4] 0x0 ptr[5] 0x0 ptr[6] 0x0 ptr[7 FAILED
Request sense:
COMMAND phase td->hwBE == 33fffda6 td->hwCBP == 33fffd88 td->hwNextTD == 33e55580 DATA phase td->hwBE == 33e525d5 td->hwCBP == 33e525c4 td->hwNextTD == 33e555c0 stat = USB_ST_CRC_ERR; usb_bulk_msg error status 32
Inquiry:
COMMAND phase td->hwBE == 33fffdb6 td->hwCBP == 33fffd98 td->hwNextTD == 33e55580 DATA phase td->hwBE == 33e523d7 td->hwCBP == 33e523b4 td->hwNextTD == 33e555c0 pdata[0] 0x0 pdata[1] 0x80 pdata[2] 0x0 pdata[3] 0x1 pdata[4] 0x1f pdata[5] 0x0 pdata[ STATUS phase td->hwBE == 33fffdf8 td->hwCBP == 33fffdec td->hwNextTD == 33e55500 dCSWSignature == 53425355 dCSWTag == 0 dCSWDataResidue == 0 bCSWStatus == 0 ptr[0] 0x55 ptr[1] 0x53 ptr[2] 0x42 ptr[3] 0x53 ptr[4] 0x0 ptr[5] 0x0 ptr[6] 0x0 ptr[7 inquiry returns 0 vendor: product: silicon-power revision: PMAP type == 0 ISO Vers 0, Response Data 1