/*
* phy-da8xx-usb - TI DaVinci DA8xx USB PHY driver
*
* Copyright (C) 2016 David Lechner <david@lechnology.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* 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/clk.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/mfd/da8xx-cfgchip.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#define PHY_INIT_BITS (CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN)
struct da8xx_usb_phy {
struct phy_provider *phy_provider;
struct phy *usb11_phy;
struct phy *usb20_phy;
struct clk *usb11_clk;
struct clk *usb20_clk;
struct regmap *regmap;
};
static int da8xx_usb11_phy_power_on(struct phy *phy)
{
struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy);
int ret;
ret = clk_prepare_enable(d_phy->usb11_clk);
if (ret)
return ret;
regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM,
CFGCHIP2_USB1SUSPENDM);
return 0;
}
static int da8xx_usb11_phy_power_off(struct phy *phy)
{
struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy);
regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM, 0);
clk_disable_unprepare(d_phy->usb11_clk);
return 0;
}
static const struct phy_ops da8xx_usb11_phy_ops = {
.power_on = da8xx_usb11_phy_power_on,
.power_off = da8xx_usb11_phy_power_off,
.owner = THIS_MODULE,
};
static int da8xx_usb20_phy_power_on(struct phy *phy)
{
struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy);
int ret;
ret = clk_prepare_enable(d_phy->usb20_clk);
if (ret)
return ret;
regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN, 0);
return 0;
}
static int da8xx_usb20_phy_power_off(struct phy *phy)
{
struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy);
regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN,
CFGCHIP2_OTGPWRDN);
clk_disable_unprepare(d_phy->usb20_clk);
return 0;
}
static int da8xx_usb20_phy_set_mode(struct phy *phy, enum phy_mode mode)
{
struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy);
u32 val;
switch (mode) {
case PHY_MODE_USB_HOST: /* Force VBUS valid, ID = 0 */
val = CFGCHIP2_OTGMODE_FORCE_HOST;
break;
case PHY_MODE_USB_DEVICE: /* Force VBUS valid, ID = 1 */
val = CFGCHIP2_OTGMODE_FORCE_DEVICE;
break;
case PHY_MODE_USB_OTG: /* Don't override the VBUS/ID comparators */
val = CFGCHIP2_OTGMODE_NO_OVERRIDE;
break;
default:
return -EINVAL;
}
regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGMODE_MASK,
val);
return 0;
}
static const struct phy_ops da8xx_usb20_phy_ops = {
.power_on = da8xx_usb20_phy_power_on,
.power_off = da8xx_usb20_phy_power_off,
.set_mode = da8xx_usb20_phy_set_mode,
.owner = THIS_MODULE,
};
static struct phy *da8xx_usb_phy_of_xlate(struct device *dev,
struct of_phandle_args *args)
{
struct da8xx_usb_phy *d_phy = dev_get_drvdata(dev);
if (!d_phy)
return ERR_PTR(-ENODEV);
switch (args->args[0]) {
case 0:
return d_phy->usb20_phy;
case 1:
return d_phy->usb11_phy;
default:
return ERR_PTR(-EINVAL);
}
}
static int da8xx_usb_phy_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
struct da8xx_usb_phy *d_phy;
d_phy = devm_kzalloc(dev, sizeof(*d_phy), GFP_KERNEL);
if (!d_phy)
return -ENOMEM;
if (node)
d_phy->regmap = syscon_regmap_lookup_by_compatible(
"ti,da830-cfgchip");
else
d_phy->regmap = syscon_regmap_lookup_by_pdevname("syscon");
if (IS_ERR(d_phy->regmap)) {
dev_err(dev, "Failed to get syscon\n");
return PTR_ERR(d_phy->regmap);
}
d_phy->usb11_clk = devm_clk_get(dev, "usb11_phy");
if (IS_ERR(d_phy->usb11_clk)) {
dev_err(dev, "Failed to get usb11_phy clock\n");
return PTR_ERR(d_phy->usb11_clk);
}
d_phy->usb20_clk = devm_clk_get(dev, "usb20_phy");
if (IS_ERR(d_phy->usb20_clk)) {
dev_err(dev, "Failed to get usb20_phy clock\n");
return PTR_ERR(d_phy->usb20_clk);
}
d_phy->usb11_phy = devm_phy_create(dev, node, &da8xx_usb11_phy_ops);
if (IS_ERR(d_phy->usb11_phy)) {
dev_err(dev, "Failed to create usb11 phy\n");
return PTR_ERR(d_phy->usb11_phy);
}
d_phy->usb20_phy = devm_phy_create(dev, node, &da8xx_usb20_phy_ops);
if (IS_ERR(d_phy->usb20_phy)) {
dev_err(dev, "Failed to create usb20 phy\n");
return PTR_ERR(d_phy->usb20_phy);
}
platform_set_drvdata(pdev, d_phy);
phy_set_drvdata(d_phy->usb11_phy, d_phy);
phy_set_drvdata(d_phy->usb20_phy, d_phy);
if (node) {
d_phy->phy_provider = devm_of_phy_provider_register(dev,
da8xx_usb_phy_of_xlate);
if (IS_ERR(d_phy->phy_provider)) {
dev_err(dev, "Failed to create phy provider\n");
return PTR_ERR(d_phy->phy_provider);
}
} else {
int ret;
ret = phy_create_lookup(d_phy->usb11_phy, "usb-phy",
"ohci-da8xx");
if (ret)
dev_warn(dev, "Failed to create usb11 phy lookup\n");
ret = phy_create_lookup(d_phy->usb20_phy, "usb-phy",
"musb-da8xx");
if (ret)
dev_warn(dev, "Failed to create usb20 phy lookup\n");
}
regmap_write_bits(d_phy->regmap, CFGCHIP(2),
PHY_INIT_BITS, PHY_INIT_BITS);
return 0;
}
static int da8xx_usb_phy_remove(struct platform_device *pdev)
{
struct da8xx_usb_phy *d_phy = platform_get_drvdata(pdev);
if (!pdev->dev.of_node) {
phy_remove_lookup(d_phy->usb20_phy, "usb-phy", "musb-da8xx");
phy_remove_lookup(d_phy->usb11_phy, "usb-phy", "ohci-da8xx");
}
return 0;
}
static const struct of_device_id da8xx_usb_phy_ids[] = {
{ .compatible = "ti,da830-usb-phy" },
{ }
};
MODULE_DEVICE_TABLE(of, da8xx_usb_phy_ids);
static struct platform_driver da8xx_usb_phy_driver = {
.probe = da8xx_usb_phy_probe,
.remove = da8xx_usb_phy_remove,
.driver = {
.name = "da8xx-usb-phy",
.of_match_table = da8xx_usb_phy_ids,
},
};
module_platform_driver(da8xx_usb_phy_driver);
MODULE_ALIAS("platform:da8xx-usb-phy");
MODULE_AUTHOR("David Lechner <david@lechnology.com>");
MODULE_DESCRIPTION("TI DA8xx USB PHY driver");
MODULE_LICENSE("GPL v2");
