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phy: qcom-ufs: add UFS HS-G4 support

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New generation (3.0) UFS devices are capable of running at HS-G4
(High Speed Gear 4) mode which is 2x faster than previous generation
UFS devices. However, if the connected UFS device is only capable of HS-G3
at maximum, putting the UFS PHY to its HS-G4 settings would cause power
penalty. This change adds a boolean variable to the PHY calibration API to
allow the callers tell the calibration API whether HS-G3 or HS-G4 settings
should be configured. The value of this boolean variable is decided by the
UFS PHY's submode.

Change-Id: Id2e5fc2285e71ae07ab3b9a19c2aa3937ad465c8
Signed-off-by: Can Guo <cang@codeaurora.org>
This commit is contained in:
Can Guo 2019-08-20 01:08:34 -07:00
commit 47bdb5f1ce
5 changed files with 19 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

6
drivers/phy/qualcomm/phy-qcom-ufs-i.h
View file

@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2013-2015, Linux Foundation. All rights reserved.
* Copyright (c) 2013-2015, 2019, Linux Foundation. All rights reserved.
*/
#ifndef UFS_QCOM_PHY_I_H_
@ -97,6 +97,7 @@ struct ufs_qcom_phy {
struct ufs_qcom_phy_specific_ops *phy_spec_ops;
enum phy_mode mode;
int submode;
struct reset_control *ufs_reset;
};
@ -114,7 +115,8 @@ struct ufs_qcom_phy {
* Rx line config
*/
struct ufs_qcom_phy_specific_ops {
int (*calibrate)(struct ufs_qcom_phy *ufs_qcom_phy, bool is_rate_B);
int (*calibrate)(struct ufs_qcom_phy *ufs_qcom_phy, bool is_rate_B,
bool is_g4);
void (*start_serdes)(struct ufs_qcom_phy *phy);
int (*is_physical_coding_sublayer_ready)(struct ufs_qcom_phy *phy);
void (*set_tx_lane_enable)(struct ufs_qcom_phy *phy, u32 val);

6
drivers/phy/qualcomm/phy-qcom-ufs-qmp-14nm.c
View file

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2013-2015, Linux Foundation. All rights reserved.
* Copyright (c) 2013-2015, 2019, Linux Foundation. All rights reserved.
*/
#include "phy-qcom-ufs-qmp-14nm.h"
@ -10,7 +10,7 @@
static
int ufs_qcom_phy_qmp_14nm_phy_calibrate(struct ufs_qcom_phy *ufs_qcom_phy,
bool is_rate_B)
bool is_rate_B, bool is_g4)
{
int tbl_size_A = ARRAY_SIZE(phy_cal_table_rate_A);
int tbl_size_B = ARRAY_SIZE(phy_cal_table_rate_B);
@ -44,6 +44,8 @@ int ufs_qcom_phy_qmp_14nm_set_mode(struct phy *generic_phy,
if (mode > 0)
phy_common->mode = mode;
phy_common->submode = submode;
return 0;
}

6
drivers/phy/qualcomm/phy-qcom-ufs-qmp-20nm.c
View file

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2013-2015, Linux Foundation. All rights reserved.
* Copyright (c) 2013-2015, 2019, Linux Foundation. All rights reserved.
*/
#include "phy-qcom-ufs-qmp-20nm.h"
@ -9,7 +9,7 @@
static
int ufs_qcom_phy_qmp_20nm_phy_calibrate(struct ufs_qcom_phy *ufs_qcom_phy,
bool is_rate_B)
bool is_rate_B, bool is_g4)
{
struct ufs_qcom_phy_calibration *tbl_A, *tbl_B;
int tbl_size_A, tbl_size_B;
@ -63,6 +63,8 @@ int ufs_qcom_phy_qmp_20nm_set_mode(struct phy *generic_phy,
if (mode > 0)
phy_common->mode = mode;
phy_common->submode = submode;
return 0;
}

4
drivers/phy/qualcomm/phy-qcom-ufs-qrbtc-sdm845.c
View file

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2016, Linux Foundation. All rights reserved.
* Copyright (c) 2016, 2019, Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@ -19,7 +19,7 @@
static
int ufs_qcom_phy_qrbtc_sdm845_phy_calibrate(struct ufs_qcom_phy *ufs_qcom_phy,
bool is_rate_B)
bool is_rate_B, bool is_g4)
{
int err;
int tbl_size_A, tbl_size_B;

6
drivers/phy/qualcomm/phy-qcom-ufs.c
View file

@ -599,6 +599,7 @@ int ufs_qcom_phy_power_on(struct phy *generic_phy)
struct ufs_qcom_phy *phy_common = get_ufs_qcom_phy(generic_phy);
struct device *dev = phy_common->dev;
bool is_rate_B = false;
bool is_gear4 = false;
int err;
err = ufs_qcom_phy_enable_vreg(dev, &phy_common->vdda_phy);
@ -656,7 +657,10 @@ int ufs_qcom_phy_power_on(struct phy *generic_phy)
if (phy_common->mode == PHY_MODE_UFS_HS_B)
is_rate_B = true;
err = phy_common->phy_spec_ops->calibrate(phy_common, is_rate_B);
is_gear4 = !!phy_common->submode;
err = phy_common->phy_spec_ops->calibrate(phy_common, is_rate_B,
is_gear4);
if (err)
goto out_disable_ref_clk;