From: Seungwon Jeon <tgih....@samsung.com>
Some host controller needs specific handling before/after
(un)hibernation, This change adds specific callback function
to support vendor's implementation.
Signed-off-by: Seungwon Jeon <tgih....@samsung.com>
Signed-off-by: Alim Akhtar <alim.akh...@samsung.com>
---
drivers/scsi/ufs/ufshcd.c | 36 ++++++++++++++++++++++++++++++++----
drivers/scsi/ufs/ufshcd.h | 3 +++
2 files changed, 35 insertions(+), 4 deletions(-)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index bc27f5e..d425ea1 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -181,8 +181,7 @@ static int ufshcd_probe_hba(struct ufs_hba *hba);
static int __ufshcd_setup_clocks(struct ufs_hba *hba, bool on,
bool skip_ref_clk);
static int ufshcd_setup_clocks(struct ufs_hba *hba, bool on);
-static int ufshcd_uic_hibern8_exit(struct ufs_hba *hba);
-static int ufshcd_uic_hibern8_enter(struct ufs_hba *hba);
+static int ufshcd_uic_hibern8_ctrl(struct ufs_hba *hba, bool en);
static inline void ufshcd_add_delay_before_dme_cmd(struct ufs_hba *hba);
static int ufshcd_host_reset_and_restore(struct ufs_hba *hba);
static irqreturn_t ufshcd_intr(int irq, void *__hba);
@@ -215,6 +214,16 @@ static inline void ufshcd_disable_irq(struct ufs_hba *hba)
}
}
+static inline int ufshcd_uic_hibern8_enter(struct ufs_hba *hba)
+{
+ return ufshcd_uic_hibern8_ctrl(hba, true);
+}
+
+static inline int ufshcd_uic_hibern8_exit(struct ufs_hba *hba)
+{
+ return ufshcd_uic_hibern8_ctrl(hba, false);
+}
+
/*
* ufshcd_wait_for_register - wait for register value to change
* @hba - per-adapter interface
@@ -2395,7 +2404,7 @@ out:
return ret;
}
-static int ufshcd_uic_hibern8_enter(struct ufs_hba *hba)
+static int __ufshcd_uic_hibern8_enter(struct ufs_hba *hba)
{
struct uic_command uic_cmd = {0};
@@ -2404,7 +2413,7 @@ static int ufshcd_uic_hibern8_enter(struct ufs_hba *hba)
return ufshcd_uic_pwr_ctrl(hba, &uic_cmd);
}
-static int ufshcd_uic_hibern8_exit(struct ufs_hba *hba)
+static int __ufshcd_uic_hibern8_exit(struct ufs_hba *hba)
{
struct uic_command uic_cmd = {0};
int ret;
@@ -2419,6 +2428,25 @@ static int ufshcd_uic_hibern8_exit(struct ufs_hba *hba)
return ret;
}
+static int ufshcd_uic_hibern8_ctrl(struct ufs_hba *hba, bool en)
+{
+ int ret;
+
+ if (hba->vops && hba->vops->hibern8_notify)
+ hba->vops->hibern8_notify(hba, en, PRE_CHANGE);
+
+ ret = en ? __ufshcd_uic_hibern8_enter(hba) :
+ __ufshcd_uic_hibern8_exit(hba);
+ if (ret)
+ goto out;
+
+ if (hba->vops && hba->vops->hibern8_notify)
+ hba->vops->hibern8_notify(hba, en, POST_CHANGE);
+
+out:
+ return ret;
+}
+
/**
* ufshcd_init_pwr_info - setting the POR (power on reset)
* values in hba power info
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 0b7dde0..045968e 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -260,6 +260,8 @@ struct ufs_pwr_mode_info {
* @specify_nexus_t_xfer_req:
* @specify_nexus_t_tm_req: called before command is issued to allow vendor
* specific handling to be set for nexus type.
+ * @hibern8_notify: called before and after hibernate/unhibernate is carried
out
+ * to allow vendor spesific implementation.
* @suspend: called during host controller PM callback
* @resume: called during host controller PM callback
*/
@@ -276,6 +278,7 @@ struct ufs_hba_variant_ops {
int (*pwr_change_notify)(struct ufs_hba *,
bool, struct ufs_pa_layer_attr *,
struct ufs_pa_layer_attr *);
+ int (*hibern8_notify)(struct ufs_hba *, bool, bool);
void (*specify_nexus_t_xfer_req)(struct ufs_hba *,
int, struct scsi_cmnd *);
void (*specify_nexus_t_tm_req)(struct ufs_hba *, int, u8);
--
1.7.10.4
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