From: jongmin jeong <jjmin.jeong@xxxxxxxxxxx>
samsung ExynosAuto9 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 UIC command.
To support this, we add the quirk and return 0 when the UIC command
send function is called.
Cc: Alim Akhtar <alim.akhtar@xxxxxxxxxxx>
Cc: James E.J. Bottomley <jejb@xxxxxxxxxxxxx>
Cc: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Cc: Bart Van Assche <bvanassche@xxxxxxx>
Reviewed-by: Alim Akhtar <alim.akhtar@xxxxxxxxxxx>
Signed-off-by: jongmin jeong <jjmin.jeong@xxxxxxxxxxx>
Signed-off-by: Chanho Park <chanho61.park@xxxxxxxxxxx>
---
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 188de6f91050..7cf8e688aec8 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -2322,6 +2322,9 @@ int ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd)
int ret;
unsigned long flags;
+ if (hba->quirks & UFSHCD_QUIRK_BROKEN_UIC_CMD)
+ return 0;
+
ufshcd_hold(hba, false);
mutex_lock(&hba->uic_cmd_mutex);
ufshcd_add_delay_before_dme_cmd(hba);
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index f0da5d3db1fa..5d485d65591f 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -588,6 +588,12 @@ enum ufshcd_quirks {
* This quirk allows only sg entries aligned with page size.
*/
UFSHCD_QUIRK_ALIGN_SG_WITH_PAGE_SIZE = 1 << 14,
+
+ /*
+ * This quirk needs to be enabled if the host controller does not
+ * support UIC command
+ */
+ UFSHCD_QUIRK_BROKEN_UIC_CMD = 1 << 15,
};
enum ufshcd_caps {
--
2.33.0
