[PATCH v2 02/15] scsi: ufs: add quirk to enable host controller without ph configuration

Chanho Park
2021-07-14T07:12:26Z

From: jongmin jeong <jjmin.jeong@samsung.com>

samsung ExynosAuto SoC has two types of host controller interface to
support the virtualization of UFS Device.
One is the physical host(PH) that the same as conventaional UFSHCI,
and the other is the virtual host(VH) that support data transfer function only.

In this structure, the virtual host does not support like device management.
This patch skips the physical host interface configuration part that cannot
be performed in the virtual host.

Suggested-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: jongmin jeong <jjmin.jeong@samsung.com>
Signed-off-by: Chanho Park <chanho61.park@samsung.com>
---
drivers/scsi/ufs/ufshcd.c | 3 +++
drivers/scsi/ufs/ufshcd.h | 6 ++++++
2 files changed, 9 insertions(+)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 9702086e9860..0df337aa1e6f 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -7988,6 +7988,9 @@ static int ufshcd_probe_hba(struct ufs_hba *hba, bool async)
if (ret)
goto out;

+ if (hba->quirks & UFSHCD_QUIRK_SKIP_PH_CONFIGURATION)
+ goto out;
+
/* Debug counters initialization */
ufshcd_clear_dbg_ufs_stats(hba);

diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index e67b1fcfe1a2..e18b12028796 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -573,6 +573,12 @@ enum ufshcd_quirks {
* support UIC command
*/
UFSHCD_QUIRK_BROKEN_UIC_CMD = 1 << 15,
+
+ /*
+ * This quirk needs to be enabled if the host controller cannot
+ * support physical host configuration.
+ */
+ UFSHCD_QUIRK_SKIP_PH_CONFIGURATION = 1 << 16,
};

enum ufshcd_caps {
--
2.32.0