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/*
* Copyright (c) 2016, The 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 <linux/of_device.h>
#include "hdmi.h"
static int msm_hdmi_phy_resource_init(struct hdmi_phy *phy)
{
struct hdmi_phy_cfg *cfg = phy->cfg;
struct device *dev = &phy->pdev->dev;
int i, ret;
phy->regs = devm_kcalloc(dev, cfg->num_regs, sizeof(phy->regs[0]),
GFP_KERNEL);
if (!phy->regs)
return -ENOMEM;
phy->clks = devm_kcalloc(dev, cfg->num_clks, sizeof(phy->clks[0]),
GFP_KERNEL);
if (!phy->clks)
return -ENOMEM;
for (i = 0; i < cfg->num_regs; i++) {
struct regulator *reg;
reg = devm_regulator_get(dev, cfg->reg_names[i]);
if (IS_ERR(reg)) {
ret = PTR_ERR(reg);
DRM_DEV_ERROR(dev, "failed to get phy regulator: %s (%d)\n",
cfg->reg_names[i], ret);
return ret;
}
phy->regs[i] = reg;
}
for (i = 0; i < cfg->num_clks; i++) {
struct clk *clk;
clk = msm_clk_get(phy->pdev, cfg->clk_names[i]);
if (IS_ERR(clk)) {
ret = PTR_ERR(clk);
DRM_DEV_ERROR(dev, "failed to get phy clock: %s (%d)\n",
cfg->clk_names[i], ret);
return ret;
}
phy->clks[i] = clk;
}
return 0;
}
int msm_hdmi_phy_resource_enable(struct hdmi_phy *phy)
{
struct hdmi_phy_cfg *cfg = phy->cfg;
struct device *dev = &phy->pdev->dev;
int i, ret = 0;
pm_runtime_get_sync(dev);
for (i = 0; i < cfg->num_regs; i++) {
ret = regulator_enable(phy->regs[i]);
if (ret)
DRM_DEV_ERROR(dev, "failed to enable regulator: %s (%d)\n",
cfg->reg_names[i], ret);
}
for (i = 0; i < cfg->num_clks; i++) {
ret = clk_prepare_enable(phy->clks[i]);
if (ret)
DRM_DEV_ERROR(dev, "failed to enable clock: %s (%d)\n",
cfg->clk_names[i], ret);
}
return ret;
}
void msm_hdmi_phy_resource_disable(struct hdmi_phy *phy)
{
struct hdmi_phy_cfg *cfg = phy->cfg;
struct device *dev = &phy->pdev->dev;
int i;
for (i = cfg->num_clks - 1; i >= 0; i--)
clk_disable_unprepare(phy->clks[i]);
for (i = cfg->num_regs - 1; i >= 0; i--)
regulator_disable(phy->regs[i]);
pm_runtime_put_sync(dev);
}
void msm_hdmi_phy_powerup(struct hdmi_phy *phy, unsigned long int pixclock)
{
if (!phy || !phy->cfg->powerup)
return;
phy->cfg->powerup(phy, pixclock);
}
void msm_hdmi_phy_powerdown(struct hdmi_phy *phy)
{
if (!phy || !phy->cfg->powerdown)
return;
phy->cfg->powerdown(phy);
}
static int msm_hdmi_phy_pll_init(struct platform_device *pdev,
enum hdmi_phy_type type)
{
int ret;
switch (type) {
case MSM_HDMI_PHY_8960:
ret = msm_hdmi_pll_8960_init(pdev);
break;
case MSM_HDMI_PHY_8996:
ret = msm_hdmi_pll_8996_init(pdev);
break;
/*
* we don't have PLL support for these, don't report an error for now
*/
case MSM_HDMI_PHY_8x60:
case MSM_HDMI_PHY_8x74:
default:
ret = 0;
break;
}
return ret;
}
static int msm_hdmi_phy_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct hdmi_phy *phy;
int ret;
phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
if (!phy)
return -ENODEV;
phy->cfg = (struct hdmi_phy_cfg *)of_device_get_match_data(dev);
if (!phy->cfg)
return -ENODEV;
phy->mmio = msm_ioremap(pdev, "hdmi_phy", "HDMI_PHY");
if (IS_ERR(phy->mmio)) {
DRM_DEV_ERROR(dev, "%s: failed to map phy base\n", __func__);
return -ENOMEM;
}
phy->pdev = pdev;
ret = msm_hdmi_phy_resource_init(phy);
if (ret)
return ret;
pm_runtime_enable(&pdev->dev);
ret = msm_hdmi_phy_resource_enable(phy);
if (ret)
return ret;
ret = msm_hdmi_phy_pll_init(pdev, phy->cfg->type);
if (ret) {
DRM_DEV_ERROR(dev, "couldn't init PLL\n");
msm_hdmi_phy_resource_disable(phy);
return ret;
}
msm_hdmi_phy_resource_disable(phy);
platform_set_drvdata(pdev, phy);
return 0;
}
static int msm_hdmi_phy_remove(struct platform_device *pdev)
{
pm_runtime_disable(&pdev->dev);
return 0;
}
static const struct of_device_id msm_hdmi_phy_dt_match[] = {
{ .compatible = "qcom,hdmi-phy-8660",
.data = &msm_hdmi_phy_8x60_cfg },
{ .compatible = "qcom,hdmi-phy-8960",
.data = &msm_hdmi_phy_8960_cfg },
{ .compatible = "qcom,hdmi-phy-8974",
.data = &msm_hdmi_phy_8x74_cfg },
{ .compatible = "qcom,hdmi-phy-8084",
.data = &msm_hdmi_phy_8x74_cfg },
{ .compatible = "qcom,hdmi-phy-8996",
.data = &msm_hdmi_phy_8996_cfg },
{}
};
static struct platform_driver msm_hdmi_phy_platform_driver = {
.probe = msm_hdmi_phy_probe,
.remove = msm_hdmi_phy_remove,
.driver = {
.name = "msm_hdmi_phy",
.of_match_table = msm_hdmi_phy_dt_match,
},
};
void __init msm_hdmi_phy_driver_register(void)
{
platform_driver_register(&msm_hdmi_phy_platform_driver);
}
void __exit msm_hdmi_phy_driver_unregister(void)
{
platform_driver_unregister(&msm_hdmi_phy_platform_driver);
}
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