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path: root/drivers/scsi/ufs
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2012-07-20[SCSI] ufs: fix incorrect return value about SUCCESS and FAILEDNamjae Jeon
Currently the UFS host driver has returned incorrect values for SUCCESS and FAILED. Fix it to return the correct value to the upper layer. Signed-off-by: Namjae Jeon <linkinjeon@gmail.com> Acked-by: Santosh Y <santoshsy@gmail.com> Signed-off-by: Venkatraman S <svenkatr@ti.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-07-20[SCSI] ufs: reverse the ufshcd_is_device_present logicVenkatraman S
Otherwise it counter intuitively returns 0 if device is present. Signed-off-by: Venkatraman S <svenkatr@ti.com> Reviewed-by: Namjae Jeon <linkinjeon@gmail.com> Acked-by: Santosh Y <santoshsy@gmail.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-07-20[SCSI] ufs: use module_pci_driverVenkatraman S
Use macro module_pci_driver and get rid of boilerplate code. No functional changes. Signed-off-by: Venkatraman S <svenkatr@ti.com> Acked-by: Santosh Y <santoshsy@gmail.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-05-23[SCSI] ufs: fix potential NULL pointer dereferencing error in ufshcd_prove.Namjae Jeon
Avoid dereferencing a NULL pointer if scsi_host_alloc is failed. Signed-off-by: Namjae Jeon <linkinjeon@gmail.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-05-10[SCSI] ufs: Assign UTRLBAU = upper_32_ bits(UTRLD base address)Santosh Yaraganavi
UTP Transfer request list base registers UTRLBA and UTRLBAU must be assigned, lower-32 and upper-32 bits of UTRLD list physical base addresses respectively. Currently UTRLBAU is being assigned lower-32 bits of UTRLD physical base address. This will cause an issue with controllers that can support 64-bit addressing. This patch correctly assigns upper-32 bits of UTRLD physical base address to UTRLBAU. Reported-by: Rene De Jong <rene.dejong@arm.com> Signed-off-by: Santosh Yaraganavi <santoshsy@gmail.com> Reviewed-by: Vinayak Holikatti <vinholikatti@gmail.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-05-10[SCSI] ufs: Fix evaluation of UTP task completion codeVenkatraman S
While interpreting the result of UTP task completion status, by using boolean &&, the evaluation would fail when the UPIU_TASK_MANAGEMENT_FUNC_SUCCEEDED was received. Either UPIU_TASK_MANAGEMENT_FUNC_COMPL or UPIU_TASK_MANAGEMENT_FUNC_SUCCEEDED should be considered as a success result. Reported-by: Joe Perches <joe@perches.com> Signed-off-by: Venkatraman S <svenkatr@ti.com> Reviewed-by: Namjae Jeon <linkinjeon@gmail.com> Acked-by: Santosh Y <santoshsy@gmail.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2012-03-27[SCSI] ufshcd: UFS Host controller driverSantosh Yaraganavi
This patch adds support for Universal Flash Storage(UFS) host controllers. The UFS host controller driver includes host controller initialization method. The Initialization process involves following steps: - Initiate UFS Host Controller initialization process by writing to Host controller enable register - Configure UFS Host controller registers with host memory space datastructure offsets. - Unipro link startup procedure - Check for connected device - Configure UFS host controller to process requests - Enable required interrupts - Configure interrupt aggregation [jejb: fix warnings in 32 bit compile] Signed-off-by: Santosh Yaraganavi <santoshsy@gmail.com> Signed-off-by: Vinayak Holikatti <vinholikatti@gmail.com> Reviewed-by: Arnd Bergmann <arnd@linaro.org> Reviewed-by: Vishak G <vishak.g@samsung.com> Reviewed-by: Girish K S <girish.shivananjappa@linaro.org> Reviewed-by: Namjae Jeon <linkinjeon@gmail.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>