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- // SPDX-License-Identifier: GPL-2.0
- /*
- * phy-uniphier-usb2.c - PHY driver for UniPhier USB2 controller
- * Copyright 2015-2018 Socionext Inc.
- * Author:
- * Kunihiko Hayashi <[email protected]>
- */
- #include <linux/mfd/syscon.h>
- #include <linux/module.h>
- #include <linux/of.h>
- #include <linux/of_platform.h>
- #include <linux/phy/phy.h>
- #include <linux/platform_device.h>
- #include <linux/regmap.h>
- #include <linux/regulator/consumer.h>
- #define SG_USBPHY1CTRL 0x500
- #define SG_USBPHY1CTRL2 0x504
- #define SG_USBPHY2CTRL 0x508
- #define SG_USBPHY2CTRL2 0x50c /* LD11 */
- #define SG_USBPHY12PLL 0x50c /* Pro4 */
- #define SG_USBPHY3CTRL 0x510
- #define SG_USBPHY3CTRL2 0x514
- #define SG_USBPHY4CTRL 0x518 /* Pro4 */
- #define SG_USBPHY4CTRL2 0x51c /* Pro4 */
- #define SG_USBPHY34PLL 0x51c /* Pro4 */
- struct uniphier_u2phy_param {
- u32 offset;
- u32 value;
- };
- struct uniphier_u2phy_soc_data {
- struct uniphier_u2phy_param config0;
- struct uniphier_u2phy_param config1;
- };
- struct uniphier_u2phy_priv {
- struct regmap *regmap;
- struct phy *phy;
- struct regulator *vbus;
- const struct uniphier_u2phy_soc_data *data;
- struct uniphier_u2phy_priv *next;
- };
- static int uniphier_u2phy_power_on(struct phy *phy)
- {
- struct uniphier_u2phy_priv *priv = phy_get_drvdata(phy);
- int ret = 0;
- if (priv->vbus)
- ret = regulator_enable(priv->vbus);
- return ret;
- }
- static int uniphier_u2phy_power_off(struct phy *phy)
- {
- struct uniphier_u2phy_priv *priv = phy_get_drvdata(phy);
- if (priv->vbus)
- regulator_disable(priv->vbus);
- return 0;
- }
- static int uniphier_u2phy_init(struct phy *phy)
- {
- struct uniphier_u2phy_priv *priv = phy_get_drvdata(phy);
- if (!priv->data)
- return 0;
- regmap_write(priv->regmap, priv->data->config0.offset,
- priv->data->config0.value);
- regmap_write(priv->regmap, priv->data->config1.offset,
- priv->data->config1.value);
- return 0;
- }
- static struct phy *uniphier_u2phy_xlate(struct device *dev,
- struct of_phandle_args *args)
- {
- struct uniphier_u2phy_priv *priv = dev_get_drvdata(dev);
- while (priv && args->np != priv->phy->dev.of_node)
- priv = priv->next;
- if (!priv) {
- dev_err(dev, "Failed to find appropriate phy\n");
- return ERR_PTR(-EINVAL);
- }
- return priv->phy;
- }
- static const struct phy_ops uniphier_u2phy_ops = {
- .init = uniphier_u2phy_init,
- .power_on = uniphier_u2phy_power_on,
- .power_off = uniphier_u2phy_power_off,
- .owner = THIS_MODULE,
- };
- static int uniphier_u2phy_probe(struct platform_device *pdev)
- {
- struct device *dev = &pdev->dev;
- struct device_node *parent, *child;
- struct uniphier_u2phy_priv *priv = NULL, *next = NULL;
- struct phy_provider *phy_provider;
- struct regmap *regmap;
- const struct uniphier_u2phy_soc_data *data;
- int ret, data_idx, ndatas;
- data = of_device_get_match_data(dev);
- if (WARN_ON(!data))
- return -EINVAL;
- /* get number of data */
- for (ndatas = 0; data[ndatas].config0.offset; ndatas++)
- ;
- parent = of_get_parent(dev->of_node);
- regmap = syscon_node_to_regmap(parent);
- of_node_put(parent);
- if (IS_ERR(regmap)) {
- dev_err(dev, "Failed to get regmap\n");
- return PTR_ERR(regmap);
- }
- for_each_child_of_node(dev->of_node, child) {
- priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
- if (!priv) {
- ret = -ENOMEM;
- goto out_put_child;
- }
- priv->regmap = regmap;
- priv->vbus = devm_regulator_get_optional(dev, "vbus");
- if (IS_ERR(priv->vbus)) {
- if (PTR_ERR(priv->vbus) == -EPROBE_DEFER) {
- ret = PTR_ERR(priv->vbus);
- goto out_put_child;
- }
- priv->vbus = NULL;
- }
- priv->phy = devm_phy_create(dev, child, &uniphier_u2phy_ops);
- if (IS_ERR(priv->phy)) {
- dev_err(dev, "Failed to create phy\n");
- ret = PTR_ERR(priv->phy);
- goto out_put_child;
- }
- ret = of_property_read_u32(child, "reg", &data_idx);
- if (ret) {
- dev_err(dev, "Failed to get reg property\n");
- goto out_put_child;
- }
- if (data_idx < ndatas)
- priv->data = &data[data_idx];
- else
- dev_warn(dev, "No phy configuration: %s\n",
- child->full_name);
- phy_set_drvdata(priv->phy, priv);
- priv->next = next;
- next = priv;
- }
- dev_set_drvdata(dev, priv);
- phy_provider = devm_of_phy_provider_register(dev,
- uniphier_u2phy_xlate);
- return PTR_ERR_OR_ZERO(phy_provider);
- out_put_child:
- of_node_put(child);
- return ret;
- }
- static const struct uniphier_u2phy_soc_data uniphier_pro4_data[] = {
- {
- .config0 = { SG_USBPHY1CTRL, 0x05142400 },
- .config1 = { SG_USBPHY12PLL, 0x00010010 },
- },
- {
- .config0 = { SG_USBPHY2CTRL, 0x05142400 },
- .config1 = { SG_USBPHY12PLL, 0x00010010 },
- },
- {
- .config0 = { SG_USBPHY3CTRL, 0x05142400 },
- .config1 = { SG_USBPHY34PLL, 0x00010010 },
- },
- {
- .config0 = { SG_USBPHY4CTRL, 0x05142400 },
- .config1 = { SG_USBPHY34PLL, 0x00010010 },
- },
- { /* sentinel */ }
- };
- static const struct uniphier_u2phy_soc_data uniphier_ld11_data[] = {
- {
- .config0 = { SG_USBPHY1CTRL, 0x82280000 },
- .config1 = { SG_USBPHY1CTRL2, 0x00000106 },
- },
- {
- .config0 = { SG_USBPHY2CTRL, 0x82280000 },
- .config1 = { SG_USBPHY2CTRL2, 0x00000106 },
- },
- {
- .config0 = { SG_USBPHY3CTRL, 0x82280000 },
- .config1 = { SG_USBPHY3CTRL2, 0x00000106 },
- },
- { /* sentinel */ }
- };
- static const struct of_device_id uniphier_u2phy_match[] = {
- {
- .compatible = "socionext,uniphier-pro4-usb2-phy",
- .data = &uniphier_pro4_data,
- },
- {
- .compatible = "socionext,uniphier-ld11-usb2-phy",
- .data = &uniphier_ld11_data,
- },
- { /* sentinel */ }
- };
- MODULE_DEVICE_TABLE(of, uniphier_u2phy_match);
- static struct platform_driver uniphier_u2phy_driver = {
- .probe = uniphier_u2phy_probe,
- .driver = {
- .name = "uniphier-usb2-phy",
- .of_match_table = uniphier_u2phy_match,
- },
- };
- module_platform_driver(uniphier_u2phy_driver);
- MODULE_AUTHOR("Kunihiko Hayashi <[email protected]>");
- MODULE_DESCRIPTION("UniPhier PHY driver for USB2 controller");
- MODULE_LICENSE("GPL v2");
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