[linux.git] / drivers / phy / socionext / phy-uniphier-usb2.c

// 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");
Commit	Line	Data
c339d3e0 KH	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* phy-uniphier-usb2.c - PHY driver for UniPhier USB2 controller
	4	* Copyright 2015-2018 Socionext Inc.
	5	* Author:
	6	* Kunihiko Hayashi <[email protected]>
	7	*/
	8
	9	#include <linux/mfd/syscon.h>
	10	#include <linux/module.h>
	11	#include <linux/of.h>
	12	#include <linux/of_platform.h>
	13	#include <linux/phy/phy.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/regmap.h>
	16	#include <linux/regulator/consumer.h>
	17
	18	#define SG_USBPHY1CTRL 0x500
	19	#define SG_USBPHY1CTRL2 0x504
	20	#define SG_USBPHY2CTRL 0x508
	21	#define SG_USBPHY2CTRL2 0x50c /* LD11 */
	22	#define SG_USBPHY12PLL 0x50c /* Pro4 */
	23	#define SG_USBPHY3CTRL 0x510
	24	#define SG_USBPHY3CTRL2 0x514
	25	#define SG_USBPHY4CTRL 0x518 /* Pro4 */
	26	#define SG_USBPHY4CTRL2 0x51c /* Pro4 */
	27	#define SG_USBPHY34PLL 0x51c /* Pro4 */
	28
	29	struct uniphier_u2phy_param {
	30	u32 offset;
	31	u32 value;
	32	};
	33
	34	struct uniphier_u2phy_soc_data {
	35	struct uniphier_u2phy_param config0;
	36	struct uniphier_u2phy_param config1;
	37	};
	38
	39	struct uniphier_u2phy_priv {
	40	struct regmap *regmap;
	41	struct phy *phy;
	42	struct regulator *vbus;
	43	const struct uniphier_u2phy_soc_data *data;
	44	struct uniphier_u2phy_priv *next;
	45	};
	46
	47	static int uniphier_u2phy_power_on(struct phy *phy)
	48	{
	49	struct uniphier_u2phy_priv *priv = phy_get_drvdata(phy);
	50	int ret = 0;
	51
	52	if (priv->vbus)
	53	ret = regulator_enable(priv->vbus);
	54
	55	return ret;
	56	}
	57
	58	static int uniphier_u2phy_power_off(struct phy *phy)
	59	{
	60	struct uniphier_u2phy_priv *priv = phy_get_drvdata(phy);
	61
	62	if (priv->vbus)
	63	regulator_disable(priv->vbus);
	64
65	return 0;
66	}
67
68	static int uniphier_u2phy_init(struct phy *phy)
69	{
70	struct uniphier_u2phy_priv *priv = phy_get_drvdata(phy);
71
72	if (!priv->data)
73	return 0;
74
75	regmap_write(priv->regmap, priv->data->config0.offset,
76	priv->data->config0.value);
77	regmap_write(priv->regmap, priv->data->config1.offset,
78	priv->data->config1.value);
79
80	return 0;
81	}
82
83	static struct phy uniphier_u2phy_xlate(struct device dev,
84	struct of_phandle_args *args)
85	{
86	struct uniphier_u2phy_priv *priv = dev_get_drvdata(dev);
87
88	while (priv && args->np != priv->phy->dev.of_node)
89	priv = priv->next;
90
91	if (!priv) {
92	dev_err(dev, "Failed to find appropriate phy\n");
93	return ERR_PTR(-EINVAL);
94	}
95
96	return priv->phy;
97	}
98
99	static const struct phy_ops uniphier_u2phy_ops = {
100	.init = uniphier_u2phy_init,
101	.power_on = uniphier_u2phy_power_on,
102	.power_off = uniphier_u2phy_power_off,
103	.owner = THIS_MODULE,
104	};
105
106	static int uniphier_u2phy_probe(struct platform_device *pdev)
107	{
108	struct device *dev = &pdev->dev;
109	struct device_node parent, child;
110	struct uniphier_u2phy_priv priv = NULL, next = NULL;
111	struct phy_provider *phy_provider;
112	struct regmap *regmap;
113	const struct uniphier_u2phy_soc_data *data;
114	int ret, data_idx, ndatas;
115
116	data = of_device_get_match_data(dev);
117	if (WARN_ON(!data))
118	return -EINVAL;
119
120	/* get number of data */
121	for (ndatas = 0; data[ndatas].config0.offset; ndatas++)
122	;
123
124	parent = of_get_parent(dev->of_node);
125	regmap = syscon_node_to_regmap(parent);
126	of_node_put(parent);
127	if (IS_ERR(regmap)) {
128	dev_err(dev, "Failed to get regmap\n");
129	return PTR_ERR(regmap);
130	}
131
132	for_each_child_of_node(dev->of_node, child) {
133	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
134	if (!priv) {
135	ret = -ENOMEM;
136	goto out_put_child;
137	}
138	priv->regmap = regmap;
139
140	priv->vbus = devm_regulator_get_optional(dev, "vbus");
141	if (IS_ERR(priv->vbus)) {
142	if (PTR_ERR(priv->vbus) == -EPROBE_DEFER) {
143	ret = PTR_ERR(priv->vbus);
144	goto out_put_child;
145	}
146	priv->vbus = NULL;
147	}
148
149	priv->phy = devm_phy_create(dev, child, &uniphier_u2phy_ops);
150	if (IS_ERR(priv->phy)) {
151	dev_err(dev, "Failed to create phy\n");
152	ret = PTR_ERR(priv->phy);
153	goto out_put_child;
154	}
155
156	ret = of_property_read_u32(child, "reg", &data_idx);
157	if (ret) {
158	dev_err(dev, "Failed to get reg property\n");
159	goto out_put_child;
160	}
161
162	if (data_idx < ndatas)
163	priv->data = &data[data_idx];
164	else
165	dev_warn(dev, "No phy configuration: %s\n",
166	child->full_name);
167
168	phy_set_drvdata(priv->phy, priv);
169	priv->next = next;
170	next = priv;
171	}
172
173	dev_set_drvdata(dev, priv);
174	phy_provider = devm_of_phy_provider_register(dev,
175	uniphier_u2phy_xlate);
176	return PTR_ERR_OR_ZERO(phy_provider);
177
178	out_put_child:
179	of_node_put(child);
180
181	return ret;
182	}
183
184	static const struct uniphier_u2phy_soc_data uniphier_pro4_data[] = {
185	{
186	.config0 = { SG_USBPHY1CTRL, 0x05142400 },
187	.config1 = { SG_USBPHY12PLL, 0x00010010 },
188	},
189	{
190	.config0 = { SG_USBPHY2CTRL, 0x05142400 },
191	.config1 = { SG_USBPHY12PLL, 0x00010010 },
192	},
193	{
194	.config0 = { SG_USBPHY3CTRL, 0x05142400 },
195	.config1 = { SG_USBPHY34PLL, 0x00010010 },
196	},
197	{
198	.config0 = { SG_USBPHY4CTRL, 0x05142400 },
199	.config1 = { SG_USBPHY34PLL, 0x00010010 },
200	},
201	{ /* sentinel */ }
202	};
203
204	static const struct uniphier_u2phy_soc_data uniphier_ld11_data[] = {
205	{
206	.config0 = { SG_USBPHY1CTRL, 0x82280000 },
207	.config1 = { SG_USBPHY1CTRL2, 0x00000106 },
208	},
209	{
210	.config0 = { SG_USBPHY2CTRL, 0x82280000 },
211	.config1 = { SG_USBPHY2CTRL2, 0x00000106 },
212	},
213	{
214	.config0 = { SG_USBPHY3CTRL, 0x82280000 },
215	.config1 = { SG_USBPHY3CTRL2, 0x00000106 },
216	},
217	{ /* sentinel */ }
218	};
219
220	static const struct of_device_id uniphier_u2phy_match[] = {
221	{
222	.compatible = "socionext,uniphier-pro4-usb2-phy",
223	.data = &uniphier_pro4_data,
224	},
225	{
226	.compatible = "socionext,uniphier-ld11-usb2-phy",
227	.data = &uniphier_ld11_data,
228	},
229	{ /* sentinel */ }
230	};
231	MODULE_DEVICE_TABLE(of, uniphier_u2phy_match);
232
233	static struct platform_driver uniphier_u2phy_driver = {
234	.probe = uniphier_u2phy_probe,
235	.driver = {
236	.name = "uniphier-usb2-phy",
237	.of_match_table = uniphier_u2phy_match,
238	},
239	};
240	module_platform_driver(uniphier_u2phy_driver);
241
242	MODULE_AUTHOR("Kunihiko Hayashi <[email protected]>");
243	MODULE_DESCRIPTION("UniPhier PHY driver for USB2 controller");
244	MODULE_LICENSE("GPL v2");