| Message ID | 20200417175944.47189-2-alim.akhtar@samsung.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | exynos-ufs: Add support for UFS HCI | expand |
> > In the right behavior, setting the bit to '0' indicates clear and '1' > indicates no change. If host controller handles this the other way, > UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR can be used. > > Signed-off-by: Seungwon Jeon <essuuj@gmail.com> > Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com> Reviewed-by: Avri Altman <avri.altman@wdc.com>
On 2020-04-18 01:59, Alim Akhtar wrote: > In the right behavior, setting the bit to '0' indicates clear and '1' > indicates no change. If host controller handles this the other way, > UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR can be used. > > Signed-off-by: Seungwon Jeon <essuuj@gmail.com> > Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com> Reviewed-by: Can Guo <cang@codeaurora.org> > --- > drivers/scsi/ufs/ufshcd.c | 11 +++++++++-- > drivers/scsi/ufs/ufshcd.h | 5 +++++ > 2 files changed, 14 insertions(+), 2 deletions(-) > > diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c > index 698e8d20b4ba..3655b88fc862 100644 > --- a/drivers/scsi/ufs/ufshcd.c > +++ b/drivers/scsi/ufs/ufshcd.c > @@ -645,7 +645,11 @@ static inline int ufshcd_get_tr_ocs(struct > ufshcd_lrb *lrbp) > */ > static inline void ufshcd_utrl_clear(struct ufs_hba *hba, u32 pos) > { > - ufshcd_writel(hba, ~(1 << pos), REG_UTP_TRANSFER_REQ_LIST_CLEAR); > + if (hba->quirks & UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR) > + ufshcd_writel(hba, (1 << pos), REG_UTP_TRANSFER_REQ_LIST_CLEAR); > + else > + ufshcd_writel(hba, ~(1 << pos), > + REG_UTP_TRANSFER_REQ_LIST_CLEAR); > } > > /** > @@ -655,7 +659,10 @@ static inline void ufshcd_utrl_clear(struct > ufs_hba *hba, u32 pos) > */ > static inline void ufshcd_utmrl_clear(struct ufs_hba *hba, u32 pos) > { > - ufshcd_writel(hba, ~(1 << pos), REG_UTP_TASK_REQ_LIST_CLEAR); > + if (hba->quirks & UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR) > + ufshcd_writel(hba, (1 << pos), REG_UTP_TASK_REQ_LIST_CLEAR); > + else > + ufshcd_writel(hba, ~(1 << pos), REG_UTP_TASK_REQ_LIST_CLEAR); > } > > /** > diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h > index 6ffc08ad85f6..071f0edf3f64 100644 > --- a/drivers/scsi/ufs/ufshcd.h > +++ b/drivers/scsi/ufs/ufshcd.h > @@ -518,6 +518,11 @@ enum ufshcd_quirks { > * ops (get_ufs_hci_version) to get the correct version. > */ > UFSHCD_QUIRK_BROKEN_UFS_HCI_VERSION = 1 << 5, > + > + /* > + * Clear handling for transfer/task request list is just opposite. > + */ > + UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR = 1 << 6, > }; > > enum ufshcd_caps { > > base-commit: 8f3d9f354286745c751374f5f1fcafee6b3f3136
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 698e8d20b4ba..3655b88fc862 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -645,7 +645,11 @@ static inline int ufshcd_get_tr_ocs(struct ufshcd_lrb *lrbp) */ static inline void ufshcd_utrl_clear(struct ufs_hba *hba, u32 pos) { - ufshcd_writel(hba, ~(1 << pos), REG_UTP_TRANSFER_REQ_LIST_CLEAR); + if (hba->quirks & UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR) + ufshcd_writel(hba, (1 << pos), REG_UTP_TRANSFER_REQ_LIST_CLEAR); + else + ufshcd_writel(hba, ~(1 << pos), + REG_UTP_TRANSFER_REQ_LIST_CLEAR); } /** @@ -655,7 +659,10 @@ static inline void ufshcd_utrl_clear(struct ufs_hba *hba, u32 pos) */ static inline void ufshcd_utmrl_clear(struct ufs_hba *hba, u32 pos) { - ufshcd_writel(hba, ~(1 << pos), REG_UTP_TASK_REQ_LIST_CLEAR); + if (hba->quirks & UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR) + ufshcd_writel(hba, (1 << pos), REG_UTP_TASK_REQ_LIST_CLEAR); + else + ufshcd_writel(hba, ~(1 << pos), REG_UTP_TASK_REQ_LIST_CLEAR); } /** diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 6ffc08ad85f6..071f0edf3f64 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -518,6 +518,11 @@ enum ufshcd_quirks { * ops (get_ufs_hci_version) to get the correct version. */ UFSHCD_QUIRK_BROKEN_UFS_HCI_VERSION = 1 << 5, + + /* + * Clear handling for transfer/task request list is just opposite. + */ + UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR = 1 << 6, }; enum ufshcd_caps {