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authorBing Zhao <bzhao@marvell.com>2009-05-19 22:48:19 -0400
committerJohn W. Linville <linville@tuxdriver.com>2009-05-22 14:06:00 -0400
commitb136a1414c94b4bda1057b4ffde26253d2527628 (patch)
tree0a534b4665d2b9478f2372473587b1d881e783e7 /drivers/acpi
parente70a5ac5d27166cfe5bfbe8f63017af3b09d72ce (diff)
libertas: get SD8688 rx length with one CMD52
Usually, the 16-bit rx length is read from scratch pad registers with two CMD52 transactions: SD8385: IF_SDIO_SCRATCH_OLD (0x80fe/0x80ff) SD8686/SD8688: IF_SDIO_SCRATCH (0x34/0x35) Alternatively, SD8688 firmware offers an enhanced method for driver to read an 8-bit rx length (in units) with a single CMD52: IF_SDIO_RX_UNIT 0x43 is read one time after firmware is ready. IF_SDIO_RX_LEN 0x42 is read every time when rx interrupt is received. Signed-off-by: Bing Zhao <bzhao@marvell.com> Acked-by: Dan Williams <dcbw@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/acpi')
0 files changed, 0 insertions, 0 deletions