Greetings,
I faced with problem: when I read data from USB Storage It unpredictably goes to 'RESET:stall' condition. After this read continuously fall down to usb_stor_BBB_reset() function Comment to this function told about Reset recovery: * For Reset Recovery the host shall issue in the following order: * a) a Bulk-Only Mass Storage Reset * b) a Clear Feature HALT to the Bulk-In endpoint * c) a Clear Feature HALT to the Bulk-Out endpoint * * This is done in 3 steps. * * If the reset doesn't succeed, the device should be port reset.
Whereas Universal Serial Bus Specification Revision 2.0 in section 8.5.3 describes that STALL handshake will be returned on all succeeding accesses until a SETUP PID is received.
I can't understand how correctly work with STALL status and where is a root of problem.
Debug information is following:
STATUS phase dev=3f3b03d8, pipe=c8008383, buffer=3f1f7490, length=13, req=(null) TOKEN=0x80008d00 .read10: start 7c70 blocks 28 COMMAND phase dev=3f3b03d8, pipe=c8008303, buffer=3f1f7444, length=31, req=(null) TOKEN=0x80008c00 DATA phase dev=3f3b03d8, pipe=c8008383, buffer=0058e000, length=20480, req=(null) TOKEN=0x8000dd08 usb_bulk_msg error status 32 BBB_reset usb_control_msg: request: 0xFF, requesttype: 0x21, value 0x0 index 0x0 length 0x0 dev=3f3b03d8, pipe=88000303, buffer=(null), length=0, req=3f1f7430 req=255 (0xff), type=33 (0x21), value=0 (0x0), index=0 TOKEN=0x80248 RESET:stall Read ERROR COMMAND phase dev=3f3b03d8, pipe=c8008303, buffer=3f1f7444, length=31, req=(null) dev=3, usbsts=0x88, p[1]=0x8001205, p[2]=0x0 usb_stor_BBB_comdat:usb_bulk_msg error failed to send CBW status -2147483648 BBB_reset usb_control_msg: request: 0xFF, requesttype: 0x21, value 0x0 index 0x0 length 0x0 dev=3f3b03d8, pipe=88000303, buffer=(null), length=0, req=3f1f7430 req=255 (0xff), type=33 (0x21), value=0 (0x0), index=0 TOKEN=0x80248 RESET:stall Request Sense returned 00 00 00 .read10: start 7c70 blocks 28 COMMAND phase dev=3f3b03d8, pipe=c8008303, buffer=3f1f7444, length=31, req=(null) dev=3, usbsts=0x88, p[1]=0x8001205, p[2]=0x0 usb_stor_BBB_comdat:usb_bulk_msg error failed to send CBW status -2147483648 BBB_reset usb_control_msg: request: 0xFF, requesttype: 0x21, value 0x0 index 0x0 length 0x0 dev=3f3b03d8, pipe=88000303, buffer=(null), length=0, req=3f1f7430 req=255 (0xff), type=33 (0x21), value=0 (0x0), index=0 TOKEN=0x80248 RESET:stall Read ERROR COMMAND phase dev=3f3b03d8, pipe=c8008303, buffer=3f1f7444, length=31, req=(null) dev=3, usbsts=0x88, p[1]=0x8001205, p[2]=0x0 usb_stor_BBB_comdat:usb_bulk_msg error failed to send CBW status -2147483648 BBB_reset usb_control_msg: request: 0xFF, requesttype: 0x21, value 0x0 index 0x0 length 0x0 dev=3f3b03d8, pipe=88000303, buffer=(null), length=0, req=3f1f7430 req=255 (0xff), type=33 (0x21), value=0 (0x0), index=0 TOKEN=0x80248 RESET:stall Request Sense returned 00 00 00 .read10: start 7c70 blocks 28 COMMAND phase dev=3f3b03d8, pipe=c8008303, buffer=3f1f7444, length=31, req=(null) dev=3, usbsts=0x88, p[1]=0x8001205, p[2]=0x0 usb_stor_BBB_comdat:usb_bulk_msg error failed to send CBW status -2147483648 BBB_reset usb_control_msg: request: 0xFF, requesttype: 0x21, value 0x0 index 0x0 length 0x0 dev=3f3b03d8, pipe=88000303, buffer=(null), length=0, req=3f1f7430 req=255 (0xff), type=33 (0x21), value=0 (0x0), index=0 TOKEN=0x80248 RESET:stall Read ERROR