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From: Stanley Chu <stanley.chu@mediatek.com>
To: <linux-scsi@vger.kernel.org>, <martin.petersen@oracle.com>,
	<avri.altman@wdc.com>, <alim.akhtar@samsung.com>,
	<jejb@linux.ibm.com>
Cc: Stanley Chu <stanley.chu@mediatek.com>,
	bvanassche@acm.org, andy.teng@mediatek.com,
	chun-hung.wu@mediatek.com, kuohong.wang@mediatek.com,
	linux-kernel@vger.kernel.org, cang@codeaurora.org,
	linux-mediatek@lists.infradead.org, peter.wang@mediatek.com,
	matthias.bgg@gmail.com, beanhuo@micron.com,
	linux-arm-kernel@lists.infradead.org, asutoshd@codeaurora.org
Subject: [PATCH v1 3/4] scsi: ufs: allow customized delay for host enabling
Date: Thu, 5 Mar 2020 12:07:03 +0800	[thread overview]
Message-ID: <20200305040704.10645-4-stanley.chu@mediatek.com> (raw)
In-Reply-To: <20200305040704.10645-1-stanley.chu@mediatek.com>

Currently a 1 ms delay is applied before polling CONTROLLER_ENABLE
bit. This delay may not be required or can be changed in different
controllers. Make the delay as a changeable value in struct ufs_hba to
allow it customized by vendors.

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
---
 drivers/scsi/ufs/ufshcd.c | 6 +++++-
 drivers/scsi/ufs/ufshcd.h | 1 +
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index ed61ecb98b2d..39cae907abd0 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -4282,7 +4282,10 @@ int ufshcd_hba_enable(struct ufs_hba *hba)
 	 * instruction might be read back.
 	 * This delay can be changed based on the controller.
 	 */
-	usleep_range(1000, 1100);
+	if (hba->hba_enable_delay_us) {
+		usleep_range(hba->hba_enable_delay_us,
+			     hba->hba_enable_delay_us + 100);
+	}
 
 	/* wait for the host controller to complete initialization */
 	retry = 10;
@@ -8402,6 +8405,7 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq)
 
 	hba->mmio_base = mmio_base;
 	hba->irq = irq;
+	hba->hba_enable_delay_us = 1000;
 
 	err = ufshcd_hba_init(hba);
 	if (err)
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 49ade1bfd085..baf1143d4839 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -662,6 +662,7 @@ struct ufs_hba {
 	u32 eh_flags;
 	u32 intr_mask;
 	u16 ee_ctrl_mask;
+	u16 hba_enable_delay_us;
 	bool is_powered;
 
 	/* Work Queues */
-- 
2.18.0
_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek

WARNING: multiple messages have this Message-ID (diff)
From: Stanley Chu <stanley.chu@mediatek.com>
To: <linux-scsi@vger.kernel.org>, <martin.petersen@oracle.com>,
	<avri.altman@wdc.com>, <alim.akhtar@samsung.com>,
	<jejb@linux.ibm.com>
Cc: <beanhuo@micron.com>, <asutoshd@codeaurora.org>,
	<cang@codeaurora.org>, <matthias.bgg@gmail.com>,
	<bvanassche@acm.org>, <linux-mediatek@lists.infradead.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>, <kuohong.wang@mediatek.com>,
	<peter.wang@mediatek.com>, <chun-hung.wu@mediatek.com>,
	<andy.teng@mediatek.com>, Stanley Chu <stanley.chu@mediatek.com>
Subject: [PATCH v1 3/4] scsi: ufs: allow customized delay for host enabling
Date: Thu, 5 Mar 2020 12:07:03 +0800	[thread overview]
Message-ID: <20200305040704.10645-4-stanley.chu@mediatek.com> (raw)
In-Reply-To: <20200305040704.10645-1-stanley.chu@mediatek.com>

Currently a 1 ms delay is applied before polling CONTROLLER_ENABLE
bit. This delay may not be required or can be changed in different
controllers. Make the delay as a changeable value in struct ufs_hba to
allow it customized by vendors.

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
---
 drivers/scsi/ufs/ufshcd.c | 6 +++++-
 drivers/scsi/ufs/ufshcd.h | 1 +
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index ed61ecb98b2d..39cae907abd0 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -4282,7 +4282,10 @@ int ufshcd_hba_enable(struct ufs_hba *hba)
 	 * instruction might be read back.
 	 * This delay can be changed based on the controller.
 	 */
-	usleep_range(1000, 1100);
+	if (hba->hba_enable_delay_us) {
+		usleep_range(hba->hba_enable_delay_us,
+			     hba->hba_enable_delay_us + 100);
+	}
 
 	/* wait for the host controller to complete initialization */
 	retry = 10;
@@ -8402,6 +8405,7 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq)
 
 	hba->mmio_base = mmio_base;
 	hba->irq = irq;
+	hba->hba_enable_delay_us = 1000;
 
 	err = ufshcd_hba_init(hba);
 	if (err)
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 49ade1bfd085..baf1143d4839 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -662,6 +662,7 @@ struct ufs_hba {
 	u32 eh_flags;
 	u32 intr_mask;
 	u16 ee_ctrl_mask;
+	u16 hba_enable_delay_us;
 	bool is_powered;
 
 	/* Work Queues */
-- 
2.18.0

WARNING: multiple messages have this Message-ID (diff)
From: Stanley Chu <stanley.chu@mediatek.com>
To: <linux-scsi@vger.kernel.org>, <martin.petersen@oracle.com>,
	<avri.altman@wdc.com>, <alim.akhtar@samsung.com>,
	<jejb@linux.ibm.com>
Cc: Stanley Chu <stanley.chu@mediatek.com>,
	bvanassche@acm.org, andy.teng@mediatek.com,
	chun-hung.wu@mediatek.com, kuohong.wang@mediatek.com,
	linux-kernel@vger.kernel.org, cang@codeaurora.org,
	linux-mediatek@lists.infradead.org, peter.wang@mediatek.com,
	matthias.bgg@gmail.com, beanhuo@micron.com,
	linux-arm-kernel@lists.infradead.org, asutoshd@codeaurora.org
Subject: [PATCH v1 3/4] scsi: ufs: allow customized delay for host enabling
Date: Thu, 5 Mar 2020 12:07:03 +0800	[thread overview]
Message-ID: <20200305040704.10645-4-stanley.chu@mediatek.com> (raw)
In-Reply-To: <20200305040704.10645-1-stanley.chu@mediatek.com>

Currently a 1 ms delay is applied before polling CONTROLLER_ENABLE
bit. This delay may not be required or can be changed in different
controllers. Make the delay as a changeable value in struct ufs_hba to
allow it customized by vendors.

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
---
 drivers/scsi/ufs/ufshcd.c | 6 +++++-
 drivers/scsi/ufs/ufshcd.h | 1 +
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index ed61ecb98b2d..39cae907abd0 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -4282,7 +4282,10 @@ int ufshcd_hba_enable(struct ufs_hba *hba)
 	 * instruction might be read back.
 	 * This delay can be changed based on the controller.
 	 */
-	usleep_range(1000, 1100);
+	if (hba->hba_enable_delay_us) {
+		usleep_range(hba->hba_enable_delay_us,
+			     hba->hba_enable_delay_us + 100);
+	}
 
 	/* wait for the host controller to complete initialization */
 	retry = 10;
@@ -8402,6 +8405,7 @@ int ufshcd_init(struct ufs_hba *hba, void __iomem *mmio_base, unsigned int irq)
 
 	hba->mmio_base = mmio_base;
 	hba->irq = irq;
+	hba->hba_enable_delay_us = 1000;
 
 	err = ufshcd_hba_init(hba);
 	if (err)
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index 49ade1bfd085..baf1143d4839 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -662,6 +662,7 @@ struct ufs_hba {
 	u32 eh_flags;
 	u32 intr_mask;
 	u16 ee_ctrl_mask;
+	u16 hba_enable_delay_us;
 	bool is_powered;
 
 	/* Work Queues */
-- 
2.18.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  parent reply	other threads:[~2020-03-05  4:10 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-05  4:07 [PATCH v1 0/4] scsi: ufs: some cleanups and make the delay for host enabling customizable Stanley Chu
2020-03-05  4:07 ` Stanley Chu
2020-03-05  4:07 ` Stanley Chu
2020-03-05  4:07 ` [PATCH v1 1/4] scsi: ufs: remove init_prefetch_data in struct ufs_hba Stanley Chu
2020-03-05  4:07   ` Stanley Chu
2020-03-05  4:07   ` Stanley Chu
2020-03-05  4:07 ` [PATCH v1 2/4] scsi: ufs: use an enum for host capabilities Stanley Chu
2020-03-05  4:07   ` Stanley Chu
2020-03-05  4:07   ` Stanley Chu
2020-03-05  5:44   ` Can Guo
2020-03-05  5:44     ` Can Guo
2020-03-05  5:44     ` Can Guo
2020-03-05  4:07 ` Stanley Chu [this message]
2020-03-05  4:07   ` [PATCH v1 3/4] scsi: ufs: allow customized delay for host enabling Stanley Chu
2020-03-05  4:07   ` Stanley Chu
2020-03-05  5:45   ` Can Guo
2020-03-05  5:45     ` Can Guo
2020-03-05  5:45     ` Can Guo
2020-03-05  4:07 ` [PATCH v1 4/4] scsi: ufs-mediatek: remove " Stanley Chu
2020-03-05  4:07   ` Stanley Chu
2020-03-05  4:07   ` Stanley Chu
2020-03-05 13:14   ` Avri Altman
2020-03-05 13:14     ` Avri Altman
2020-03-05 13:14     ` Avri Altman
2020-03-05 13:25     ` Stanley Chu
2020-03-05 13:25       ` Stanley Chu
2020-03-05 13:25       ` Stanley Chu

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