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AM335x read USB STAT register values

Hayden Kim
Genius 15580 points

With "devmem2" utility, I wnat to check USB STAT register values.

When I read the values, it seems that the value is not correct (all values are '0').

So, can you guide how to check the correct USB status register values?

(before USB memory stick connect)

(USB1REV)
Read at address 0x47401800 (0xb6f72800): 0x4EA20800
(USB1CTRL)
Read at address 0x47401814 (0xb6f44814): 0x00000000
(USB1STAT)
Read at address 0x47401818 (0xb6f1d818): 0x00000001
(USB1IRQMSTAT)
Read at address 0x47401820 (0xb6fba820): 0x00000000
(USB1IRQSTATRAW0)
Read at address 0x47401828 (0xb6f91828): 0x00000000
(USB1IRQSTATRAW1)
Read at address 0x4740182C (0xb6fe682c): 0x00000000
(USB1IRQSTAT0)
Read at address 0x47401830 (0xb6fbd830): 0x00000000
(USB1IRQSTAT1)
Read at address 0x47401834 (0xb6f6c834): 0x00000000

(after USB memory stick connect)

(USB1REV)
Read at address 0x47401800 (0xb6f72800): 0x4EA20800
(USB1CTRL)
Read at address 0x47401814 (0xb6f44814): 0x00000000
(USB1STAT)
Read at address 0x47401818 (0xb6f1d818): 0x00000001
(USB1IRQMSTAT)
Read at address 0x47401820 (0xb6fba820): 0x00000000
(USB1IRQSTATRAW0)
Read at address 0x47401828 (0xb6f91828): 0x00000000
(USB1IRQSTATRAW1)
Read at address 0x4740182C (0xb6fe682c): 0x00000008
(USB1IRQSTAT0)
Read at address 0x47401830 (0xb6fbd830): 0x00000000
(USB1IRQSTAT1)
Read at address 0x47401834 (0xb6f6c834): 0x00000000

Thanks and regards,

Hayden