[SCSI] ufs: rework link start-up process

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Link start-up requires long time with multiphase handshakes
between UFS host and device. This affects driver's probe time.
This patch let link start-up run asynchronously. Link start-up
will be executed at the end of prove separately.
Along with this change, the following is worked.

Defined completion time of uic command to avoid a permanent wait.
Added mutex to guarantee of uic command at a time.
Adapted some sequence of controller initialization after link statup
according to HCI standard.

Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com>
Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org>
Tested-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Santosh Y <santoshsy@gmail.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

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This commit is contained in:

Seungwon Jeon 2013-06-26 22:39:29 +05:30 • committed by James Bottomley

parent 261ea45203

commit 6ccf44fe4c

2 changed files with 208 additions and 97 deletions

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295

drivers/scsi/ufs/ufshcd.c

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10

drivers/scsi/ufs/ufshcd.h

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