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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2018 MediaTek Inc.
* Author: Jie Qiu <jie.qiu@mediatek.com>
*/
#include "phy-mtk-hdmi.h"
static int mtk_hdmi_phy_power_on(struct phy *phy);
static int mtk_hdmi_phy_power_off(struct phy *phy);
static const struct phy_ops mtk_hdmi_phy_dev_ops = {
.power_on = mtk_hdmi_phy_power_on,
.power_off = mtk_hdmi_phy_power_off,
.owner = THIS_MODULE,
};
inline struct mtk_hdmi_phy *to_mtk_hdmi_phy(struct clk_hw *hw)
{
return container_of(hw, struct mtk_hdmi_phy, pll_hw);
}
static int mtk_hdmi_phy_power_on(struct phy *phy)
{
struct mtk_hdmi_phy *hdmi_phy = phy_get_drvdata(phy);
int ret;
ret = clk_prepare_enable(hdmi_phy->pll);
if (ret < 0)
return ret;
hdmi_phy->conf->hdmi_phy_enable_tmds(hdmi_phy);
return 0;
}
static int mtk_hdmi_phy_power_off(struct phy *phy)
{
struct mtk_hdmi_phy *hdmi_phy = phy_get_drvdata(phy);
hdmi_phy->conf->hdmi_phy_disable_tmds(hdmi_phy);
clk_disable_unprepare(hdmi_phy->pll);
return 0;
}
static const struct phy_ops *
mtk_hdmi_phy_dev_get_ops(const struct mtk_hdmi_phy *hdmi_phy)
{
if (hdmi_phy && hdmi_phy->conf &&
hdmi_phy->conf->hdmi_phy_enable_tmds &&
hdmi_phy->conf->hdmi_phy_disable_tmds)
return &mtk_hdmi_phy_dev_ops;
if (hdmi_phy)
dev_err(hdmi_phy->dev, "Failed to get dev ops of phy\n");
return NULL;
}
static void mtk_hdmi_phy_clk_get_data(struct mtk_hdmi_phy *hdmi_phy,
struct clk_init_data *clk_init)
{
clk_init->flags = hdmi_phy->conf->flags;
clk_init->ops = hdmi_phy->conf->hdmi_phy_clk_ops;
}
static int mtk_hdmi_phy_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct mtk_hdmi_phy *hdmi_phy;
struct clk *ref_clk;
const char *ref_clk_name;
struct clk_init_data clk_init = {
.num_parents = 1,
.parent_names = (const char * const *)&ref_clk_name,
};
struct phy *phy;
struct phy_provider *phy_provider;
int ret;
hdmi_phy = devm_kzalloc(dev, sizeof(*hdmi_phy), GFP_KERNEL);
if (!hdmi_phy)
return -ENOMEM;
hdmi_phy->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(hdmi_phy->regs))
return PTR_ERR(hdmi_phy->regs);
ref_clk = devm_clk_get(dev, "pll_ref");
if (IS_ERR(ref_clk))
return dev_err_probe(dev, PTR_ERR(ref_clk),
"Failed to get PLL reference clock\n");
ref_clk_name = __clk_get_name(ref_clk);
ret = of_property_read_string(dev->of_node, "clock-output-names",
&clk_init.name);
if (ret < 0)
return dev_err_probe(dev, ret, "Failed to read clock-output-names\n");
hdmi_phy->dev = dev;
hdmi_phy->conf =
(struct mtk_hdmi_phy_conf *)of_device_get_match_data(dev);
mtk_hdmi_phy_clk_get_data(hdmi_phy, &clk_init);
hdmi_phy->pll_hw.init = &clk_init;
hdmi_phy->pll = devm_clk_register(dev, &hdmi_phy->pll_hw);
if (IS_ERR(hdmi_phy->pll))
return dev_err_probe(dev, PTR_ERR(hdmi_phy->pll),
"Failed to register PLL\n");
ret = of_property_read_u32(dev->of_node, "mediatek,ibias",
&hdmi_phy->ibias);
if (ret < 0)
return dev_err_probe(dev, ret, "Failed to get ibias\n");
ret = of_property_read_u32(dev->of_node, "mediatek,ibias_up",
&hdmi_phy->ibias_up);
if (ret < 0)
return dev_err_probe(dev, ret, "Failed to get ibias_up\n");
dev_info(dev, "Using default TX DRV impedance: 4.2k/36\n");
hdmi_phy->drv_imp_clk = 0x30;
hdmi_phy->drv_imp_d2 = 0x30;
hdmi_phy->drv_imp_d1 = 0x30;
hdmi_phy->drv_imp_d0 = 0x30;
phy = devm_phy_create(dev, NULL, mtk_hdmi_phy_dev_get_ops(hdmi_phy));
if (IS_ERR(phy))
return dev_err_probe(dev, PTR_ERR(phy), "Cannot create HDMI PHY\n");
phy_set_drvdata(phy, hdmi_phy);
phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
if (IS_ERR(phy_provider))
return dev_err_probe(dev, PTR_ERR(phy_provider),
"Failed to register HDMI PHY\n");
if (hdmi_phy->conf->pll_default_off)
hdmi_phy->conf->hdmi_phy_disable_tmds(hdmi_phy);
return of_clk_add_provider(dev->of_node, of_clk_src_simple_get,
hdmi_phy->pll);
}
static const struct of_device_id mtk_hdmi_phy_match[] = {
{ .compatible = "mediatek,mt2701-hdmi-phy",
.data = &mtk_hdmi_phy_2701_conf,
},
{ .compatible = "mediatek,mt8173-hdmi-phy",
.data = &mtk_hdmi_phy_8173_conf,
},
{},
};
MODULE_DEVICE_TABLE(of, mtk_hdmi_phy_match);
static struct platform_driver mtk_hdmi_phy_driver = {
.probe = mtk_hdmi_phy_probe,
.driver = {
.name = "mediatek-hdmi-phy",
.of_match_table = mtk_hdmi_phy_match,
},
};
module_platform_driver(mtk_hdmi_phy_driver);
MODULE_DESCRIPTION("MediaTek HDMI PHY Driver");
MODULE_LICENSE("GPL v2");
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