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phy: socionext: add USB2 PHY driver for UniPhier SoC
Add a driver for PHY interface built into USB2 controller implemented on UniPhier SoCs. This driver supports HS-PHY for Pro4 and LD11. Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Kunihiko Hayashi
Kishon Vijay Abraham I
parent
39f6863649
commit
c339d3e0fb
@ -2,6 +2,19 @@
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# PHY drivers for Socionext platforms.
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#
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config PHY_UNIPHIER_USB2
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tristate "UniPhier USB2 PHY driver"
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depends on ARCH_UNIPHIER || COMPILE_TEST
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depends on OF && HAS_IOMEM
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select GENERIC_PHY
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select MFD_SYSCON
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help
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Enable this to support USB PHY implemented on USB2 controller
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on UniPhier SoCs. This driver provides interface to interact
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with USB 2.0 PHY that is part of the UniPhier SoC.
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In case of Pro4, it is necessary to specify this USB2 PHY instead
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of USB3 HS-PHY.
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config PHY_UNIPHIER_USB3
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tristate "UniPhier USB3 PHY driver"
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depends on ARCH_UNIPHIER || COMPILE_TEST
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@ -3,4 +3,5 @@
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# Makefile for the phy drivers.
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#
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obj-$(CONFIG_PHY_UNIPHIER_USB2) += phy-uniphier-usb2.o
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obj-$(CONFIG_PHY_UNIPHIER_USB3) += phy-uniphier-usb3hs.o phy-uniphier-usb3ss.o
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244
drivers/phy/socionext/phy-uniphier-usb2.c
Normal file
244
drivers/phy/socionext/phy-uniphier-usb2.c
Normal file
@ -0,0 +1,244 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* phy-uniphier-usb2.c - PHY driver for UniPhier USB2 controller
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* Copyright 2015-2018 Socionext Inc.
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* Author:
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* Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
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*/
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#include <linux/mfd/syscon.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/phy/phy.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/regulator/consumer.h>
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#define SG_USBPHY1CTRL 0x500
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#define SG_USBPHY1CTRL2 0x504
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#define SG_USBPHY2CTRL 0x508
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#define SG_USBPHY2CTRL2 0x50c /* LD11 */
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#define SG_USBPHY12PLL 0x50c /* Pro4 */
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#define SG_USBPHY3CTRL 0x510
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#define SG_USBPHY3CTRL2 0x514
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#define SG_USBPHY4CTRL 0x518 /* Pro4 */
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#define SG_USBPHY4CTRL2 0x51c /* Pro4 */
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#define SG_USBPHY34PLL 0x51c /* Pro4 */
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struct uniphier_u2phy_param {
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u32 offset;
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u32 value;
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};
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struct uniphier_u2phy_soc_data {
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struct uniphier_u2phy_param config0;
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struct uniphier_u2phy_param config1;
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};
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struct uniphier_u2phy_priv {
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struct regmap *regmap;
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struct phy *phy;
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struct regulator *vbus;
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const struct uniphier_u2phy_soc_data *data;
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struct uniphier_u2phy_priv *next;
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};
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static int uniphier_u2phy_power_on(struct phy *phy)
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{
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struct uniphier_u2phy_priv *priv = phy_get_drvdata(phy);
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int ret = 0;
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if (priv->vbus)
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ret = regulator_enable(priv->vbus);
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return ret;
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}
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static int uniphier_u2phy_power_off(struct phy *phy)
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{
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struct uniphier_u2phy_priv *priv = phy_get_drvdata(phy);
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if (priv->vbus)
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regulator_disable(priv->vbus);
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return 0;
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}
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static int uniphier_u2phy_init(struct phy *phy)
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{
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struct uniphier_u2phy_priv *priv = phy_get_drvdata(phy);
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if (!priv->data)
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return 0;
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regmap_write(priv->regmap, priv->data->config0.offset,
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priv->data->config0.value);
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regmap_write(priv->regmap, priv->data->config1.offset,
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priv->data->config1.value);
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return 0;
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}
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static struct phy *uniphier_u2phy_xlate(struct device *dev,
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struct of_phandle_args *args)
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{
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struct uniphier_u2phy_priv *priv = dev_get_drvdata(dev);
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while (priv && args->np != priv->phy->dev.of_node)
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priv = priv->next;
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if (!priv) {
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dev_err(dev, "Failed to find appropriate phy\n");
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return ERR_PTR(-EINVAL);
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}
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return priv->phy;
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}
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static const struct phy_ops uniphier_u2phy_ops = {
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.init = uniphier_u2phy_init,
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.power_on = uniphier_u2phy_power_on,
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.power_off = uniphier_u2phy_power_off,
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.owner = THIS_MODULE,
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};
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static int uniphier_u2phy_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct device_node *parent, *child;
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struct uniphier_u2phy_priv *priv = NULL, *next = NULL;
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struct phy_provider *phy_provider;
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struct regmap *regmap;
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const struct uniphier_u2phy_soc_data *data;
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int ret, data_idx, ndatas;
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data = of_device_get_match_data(dev);
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if (WARN_ON(!data))
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return -EINVAL;
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/* get number of data */
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for (ndatas = 0; data[ndatas].config0.offset; ndatas++)
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;
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parent = of_get_parent(dev->of_node);
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regmap = syscon_node_to_regmap(parent);
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of_node_put(parent);
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if (IS_ERR(regmap)) {
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dev_err(dev, "Failed to get regmap\n");
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return PTR_ERR(regmap);
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}
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for_each_child_of_node(dev->of_node, child) {
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv) {
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ret = -ENOMEM;
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goto out_put_child;
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}
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priv->regmap = regmap;
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priv->vbus = devm_regulator_get_optional(dev, "vbus");
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if (IS_ERR(priv->vbus)) {
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if (PTR_ERR(priv->vbus) == -EPROBE_DEFER) {
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ret = PTR_ERR(priv->vbus);
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goto out_put_child;
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}
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priv->vbus = NULL;
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}
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priv->phy = devm_phy_create(dev, child, &uniphier_u2phy_ops);
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if (IS_ERR(priv->phy)) {
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dev_err(dev, "Failed to create phy\n");
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ret = PTR_ERR(priv->phy);
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goto out_put_child;
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}
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ret = of_property_read_u32(child, "reg", &data_idx);
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if (ret) {
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dev_err(dev, "Failed to get reg property\n");
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goto out_put_child;
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}
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if (data_idx < ndatas)
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priv->data = &data[data_idx];
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else
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dev_warn(dev, "No phy configuration: %s\n",
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child->full_name);
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phy_set_drvdata(priv->phy, priv);
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priv->next = next;
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next = priv;
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}
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dev_set_drvdata(dev, priv);
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phy_provider = devm_of_phy_provider_register(dev,
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uniphier_u2phy_xlate);
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return PTR_ERR_OR_ZERO(phy_provider);
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out_put_child:
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of_node_put(child);
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return ret;
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}
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static const struct uniphier_u2phy_soc_data uniphier_pro4_data[] = {
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{
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.config0 = { SG_USBPHY1CTRL, 0x05142400 },
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.config1 = { SG_USBPHY12PLL, 0x00010010 },
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},
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{
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.config0 = { SG_USBPHY2CTRL, 0x05142400 },
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.config1 = { SG_USBPHY12PLL, 0x00010010 },
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},
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{
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.config0 = { SG_USBPHY3CTRL, 0x05142400 },
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.config1 = { SG_USBPHY34PLL, 0x00010010 },
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},
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{
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.config0 = { SG_USBPHY4CTRL, 0x05142400 },
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.config1 = { SG_USBPHY34PLL, 0x00010010 },
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},
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{ /* sentinel */ }
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};
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static const struct uniphier_u2phy_soc_data uniphier_ld11_data[] = {
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{
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.config0 = { SG_USBPHY1CTRL, 0x82280000 },
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.config1 = { SG_USBPHY1CTRL2, 0x00000106 },
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},
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{
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.config0 = { SG_USBPHY2CTRL, 0x82280000 },
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.config1 = { SG_USBPHY2CTRL2, 0x00000106 },
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},
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{
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.config0 = { SG_USBPHY3CTRL, 0x82280000 },
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.config1 = { SG_USBPHY3CTRL2, 0x00000106 },
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},
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{ /* sentinel */ }
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};
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static const struct of_device_id uniphier_u2phy_match[] = {
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{
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.compatible = "socionext,uniphier-pro4-usb2-phy",
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.data = &uniphier_pro4_data,
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},
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{
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.compatible = "socionext,uniphier-ld11-usb2-phy",
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.data = &uniphier_ld11_data,
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},
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, uniphier_u2phy_match);
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static struct platform_driver uniphier_u2phy_driver = {
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.probe = uniphier_u2phy_probe,
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.driver = {
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.name = "uniphier-usb2-phy",
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.of_match_table = uniphier_u2phy_match,
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},
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};
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module_platform_driver(uniphier_u2phy_driver);
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MODULE_AUTHOR("Kunihiko Hayashi <hayashi.kunihiko@socionext.com>");
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MODULE_DESCRIPTION("UniPhier PHY driver for USB2 controller");
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MODULE_LICENSE("GPL v2");
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