Release 4.7 drivers/phy/phy-qcom-ufs-qmp-14nm.c
/*
* Copyright (c) 2013-2015, 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
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include "phy-qcom-ufs-qmp-14nm.h"
#define UFS_PHY_NAME "ufs_phy_qmp_14nm"
#define UFS_PHY_VDDA_PHY_UV (925000)
static
int ufs_qcom_phy_qmp_14nm_phy_calibrate(struct ufs_qcom_phy *ufs_qcom_phy,
bool is_rate_B)
{
int tbl_size_A = ARRAY_SIZE(phy_cal_table_rate_A);
int tbl_size_B = ARRAY_SIZE(phy_cal_table_rate_B);
int err;
err = ufs_qcom_phy_calibrate(ufs_qcom_phy, phy_cal_table_rate_A,
tbl_size_A, phy_cal_table_rate_B, tbl_size_B, is_rate_B);
if (err)
dev_err(ufs_qcom_phy->dev,
"%s: ufs_qcom_phy_calibrate() failed %d\n",
__func__, err);
return err;
}
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static
void ufs_qcom_phy_qmp_14nm_advertise_quirks(struct ufs_qcom_phy *phy_common)
{
phy_common->quirks =
UFS_QCOM_PHY_QUIRK_HIBERN8_EXIT_AFTER_PHY_PWR_COLLAPSE;
}
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static int ufs_qcom_phy_qmp_14nm_init(struct phy *generic_phy)
{
struct ufs_qcom_phy_qmp_14nm *phy = phy_get_drvdata(generic_phy);
struct ufs_qcom_phy *phy_common = &phy->common_cfg;
int err;
err = ufs_qcom_phy_init_clks(generic_phy, phy_common);
if (err) {
dev_err(phy_common->dev, "%s: ufs_qcom_phy_init_clks() failed %d\n",
__func__, err);
goto out;
}
err = ufs_qcom_phy_init_vregulators(generic_phy, phy_common);
if (err) {
dev_err(phy_common->dev, "%s: ufs_qcom_phy_init_vregulators() failed %d\n",
__func__, err);
goto out;
}
phy_common->vdda_phy.max_uV = UFS_PHY_VDDA_PHY_UV;
phy_common->vdda_phy.min_uV = UFS_PHY_VDDA_PHY_UV;
ufs_qcom_phy_qmp_14nm_advertise_quirks(phy_common);
out:
return err;
}
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static
void ufs_qcom_phy_qmp_14nm_power_control(struct ufs_qcom_phy *phy, bool val)
{
writel_relaxed(val ? 0x1 : 0x0, phy->mmio + UFS_PHY_POWER_DOWN_CONTROL);
/*
* Before any transactions involving PHY, ensure PHY knows
* that it's analog rail is powered ON (or OFF).
*/
mb();
}
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static inline
void ufs_qcom_phy_qmp_14nm_set_tx_lane_enable(struct ufs_qcom_phy *phy, u32 val)
{
/*
* 14nm PHY does not have TX_LANE_ENABLE register.
* Implement this function so as not to propagate error to caller.
*/
}
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static inline void ufs_qcom_phy_qmp_14nm_start_serdes(struct ufs_qcom_phy *phy)
{
u32 tmp;
tmp = readl_relaxed(phy->mmio + UFS_PHY_PHY_START);
tmp &= ~MASK_SERDES_START;
tmp |= (1 << OFFSET_SERDES_START);
writel_relaxed(tmp, phy->mmio + UFS_PHY_PHY_START);
/* Ensure register value is committed */
mb();
}
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static int ufs_qcom_phy_qmp_14nm_is_pcs_ready(struct ufs_qcom_phy *phy_common)
{
int err = 0;
u32 val;
err = readl_poll_timeout(phy_common->mmio + UFS_PHY_PCS_READY_STATUS,
val, (val & MASK_PCS_READY), 10, 1000000);
if (err)
dev_err(phy_common->dev, "%s: poll for pcs failed err = %d\n",
__func__, err);
return err;
}
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static const struct phy_ops ufs_qcom_phy_qmp_14nm_phy_ops = {
.init = ufs_qcom_phy_qmp_14nm_init,
.exit = ufs_qcom_phy_exit,
.power_on = ufs_qcom_phy_power_on,
.power_off = ufs_qcom_phy_power_off,
.owner = THIS_MODULE,
};
static struct ufs_qcom_phy_specific_ops phy_14nm_ops = {
.calibrate_phy = ufs_qcom_phy_qmp_14nm_phy_calibrate,
.start_serdes = ufs_qcom_phy_qmp_14nm_start_serdes,
.is_physical_coding_sublayer_ready = ufs_qcom_phy_qmp_14nm_is_pcs_ready,
.set_tx_lane_enable = ufs_qcom_phy_qmp_14nm_set_tx_lane_enable,
.power_control = ufs_qcom_phy_qmp_14nm_power_control,
};
static int ufs_qcom_phy_qmp_14nm_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct phy *generic_phy;
struct ufs_qcom_phy_qmp_14nm *phy;
int err = 0;
phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
if (!phy) {
dev_err(dev, "%s: failed to allocate phy\n", __func__);
err = -ENOMEM;
goto out;
}
generic_phy = ufs_qcom_phy_generic_probe(pdev, &phy->common_cfg,
&ufs_qcom_phy_qmp_14nm_phy_ops, &phy_14nm_ops);
if (!generic_phy) {
dev_err(dev, "%s: ufs_qcom_phy_generic_probe() failed\n",
__func__);
err = -EIO;
goto out;
}
phy_set_drvdata(generic_phy, phy);
strlcpy(phy->common_cfg.name, UFS_PHY_NAME,
sizeof(phy->common_cfg.name));
out:
return err;
}
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static int ufs_qcom_phy_qmp_14nm_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct phy *generic_phy = to_phy(dev);
struct ufs_qcom_phy *ufs_qcom_phy = get_ufs_qcom_phy(generic_phy);
int err = 0;
err = ufs_qcom_phy_remove(generic_phy, ufs_qcom_phy);
if (err)
dev_err(dev, "%s: ufs_qcom_phy_remove failed = %d\n",
__func__, err);
return err;
}
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static const struct of_device_id ufs_qcom_phy_qmp_14nm_of_match[] = {
{.compatible = "qcom,ufs-phy-qmp-14nm"},
{},
};
MODULE_DEVICE_TABLE(of, ufs_qcom_phy_qmp_14nm_of_match);
static struct platform_driver ufs_qcom_phy_qmp_14nm_driver = {
.probe = ufs_qcom_phy_qmp_14nm_probe,
.remove = ufs_qcom_phy_qmp_14nm_remove,
.driver = {
.of_match_table = ufs_qcom_phy_qmp_14nm_of_match,
.name = "ufs_qcom_phy_qmp_14nm",
},
};
module_platform_driver(ufs_qcom_phy_qmp_14nm_driver);
MODULE_DESCRIPTION("Universal Flash Storage (UFS) QCOM PHY QMP 14nm");
MODULE_LICENSE("GPL v2");
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