summaryrefslogtreecommitdiffstats
path: root/include/linux/phy/phy.h
blob: 679ce6e42079d91b635595b3753363231f447fd4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
/*
 * phy.h -- generic phy header file
 *
 * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
 *
 * Author: Kishon Vijay Abraham I <kishon@ti.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; either version 2 of the License, or
 * (at your option) any later version.
 */

#ifndef __DRIVERS_PHY_H
#define __DRIVERS_PHY_H

#include <linux/err.h>
#include <of.h>
#include <regulator.h>

struct phy;

/**
 * struct phy_ops - set of function pointers for performing phy operations
 * @init: operation to be performed for initializing phy
 * @exit: operation to be performed while exiting
 * @power_on: powering on the phy
 * @power_off: powering off the phy
 * @owner: the module owner containing the ops
 */
struct phy_ops {
	int	(*init)(struct phy *phy);
	int	(*exit)(struct phy *phy);
	int	(*power_on)(struct phy *phy);
	int	(*power_off)(struct phy *phy);
	struct usb_phy *(*to_usbphy)(struct phy *phy);
};

/**
 * struct phy_attrs - represents phy attributes
 * @bus_width: Data path width implemented by PHY
 */
struct phy_attrs {
	u32			bus_width;
};

/**
 * struct phy - represents the phy device
 * @dev: phy device
 * @id: id of the phy device
 * @ops: function pointers for performing phy operations
 * @mutex: mutex to protect phy_ops
 * @init_count: used to protect when the PHY is used by multiple consumers
 * @power_count: used to protect when the PHY is used by multiple consumers
 * @phy_attrs: used to specify PHY specific attributes
 */
struct phy {
	struct device_d		dev;
	int			id;
	const struct phy_ops	*ops;
	int			init_count;
	int			power_count;
	struct phy_attrs	attrs;
	struct regulator	*pwr;
};

/**
 * struct phy_provider - represents the phy provider
 * @dev: phy provider device
 * @owner: the module owner having of_xlate
 * @of_xlate: function pointer to obtain phy instance from phy pointer
 * @list: to maintain a linked list of PHY providers
 */
struct phy_provider {
	struct device_d		*dev;
	struct list_head	list;
	struct phy * (*of_xlate)(struct device_d *dev,
		struct of_phandle_args *args);
};

/**
 * struct phy_consumer - represents the phy consumer
 * @dev_name: the device name of the controller that will use this PHY device
 * @port: name given to the consumer port
 */
struct phy_consumer {
	const char *dev_name;
	const char *port;
};

/**
 * struct phy_init_data - contains the list of PHY consumers
 * @num_consumers: number of consumers for this PHY device
 * @consumers: list of PHY consumers
 */
struct phy_init_data {
	unsigned int num_consumers;
	struct phy_consumer *consumers;
};

#define PHY_CONSUMER(_dev_name, _port)				\
{								\
	.dev_name	= _dev_name,				\
	.port		= _port,				\
}

#define	to_phy(dev)	(container_of((dev), struct phy, dev))

#define	of_phy_provider_register(dev, xlate)	\
	__of_phy_provider_register((dev), (xlate))


static inline void phy_set_drvdata(struct phy *phy, void *data)
{
	phy->dev.priv = data;
}

static inline void *phy_get_drvdata(struct phy *phy)
{
	return phy->dev.priv;
}

#if IS_ENABLED(CONFIG_GENERIC_PHY)
int phy_init(struct phy *phy);
int phy_exit(struct phy *phy);
int phy_power_on(struct phy *phy);
int phy_power_off(struct phy *phy);
static inline int phy_get_bus_width(struct phy *phy)
{
	return phy->attrs.bus_width;
}
static inline void phy_set_bus_width(struct phy *phy, int bus_width)
{
	phy->attrs.bus_width = bus_width;
}
struct phy *phy_get(struct device_d *dev, const char *string);
struct phy *phy_optional_get(struct device_d *dev, const char *string);
struct phy *of_phy_get_by_phandle(struct device_d *dev, const char *phandle,
				  u8 index);
void phy_put(struct phy *phy);
struct phy *of_phy_get(struct device_node *np, const char *con_id);
struct phy *phy_create(struct device_d *dev, struct device_node *node,
		       const struct phy_ops *ops);
void phy_destroy(struct phy *phy);
struct phy_provider *__of_phy_provider_register(struct device_d *dev,
	struct phy * (*of_xlate)(struct device_d *dev,
	struct of_phandle_args *args));
void of_phy_provider_unregister(struct phy_provider *phy_provider);
struct usb_phy *phy_to_usbphy(struct phy *phy);
struct phy *phy_get_by_index(struct device_d *dev, int index);
#else
static inline int phy_init(struct phy *phy)
{
	if (!phy)
		return 0;
	return -ENOSYS;
}

static inline int phy_exit(struct phy *phy)
{
	if (!phy)
		return 0;
	return -ENOSYS;
}

static inline int phy_power_on(struct phy *phy)
{
	if (!phy)
		return 0;
	return -ENOSYS;
}

static inline int phy_power_off(struct phy *phy)
{
	if (!phy)
		return 0;
	return -ENOSYS;
}

static inline int phy_get_bus_width(struct phy *phy)
{
	return -ENOSYS;
}

static inline void phy_set_bus_width(struct phy *phy, int bus_width)
{
	return;
}

static inline struct phy *phy_get(struct device_d *dev, const char *string)
{
	return ERR_PTR(-ENOSYS);
}

static inline struct phy *phy_optional_get(struct device_d *dev,
					   const char *string)
{
	return ERR_PTR(-ENOSYS);
}

static inline struct phy *of_phy_get_by_phandle(struct device_d *dev,
						const char *phandle, u8 index)
{
	return ERR_PTR(-ENOSYS);
}

static inline void phy_put(struct phy *phy)
{
}

static inline struct phy *of_phy_get(struct device_node *np, const char *con_id)
{
	return ERR_PTR(-ENOSYS);
}

static inline struct phy *phy_create(struct device_d *dev,
				     struct device_node *node,
				     const struct phy_ops *ops)
{
	return ERR_PTR(-ENOSYS);
}

static inline void phy_destroy(struct phy *phy)
{
}

static inline struct phy_provider *__of_phy_provider_register(
	struct device_d *dev, struct phy * (*of_xlate)(
	struct device_d *dev, struct of_phandle_args *args))
{
	return ERR_PTR(-ENOSYS);
}

static inline void of_phy_provider_unregister(struct phy_provider *phy_provider)
{
}

static inline struct usb_phy *phy_to_usbphy(struct phy *phy)
{
	return NULL;
}

static inline struct phy *phy_get_by_index(struct device_d *dev, int index)
{
	return ERR_PTR(-ENODEV);
}

#endif

#endif /* __DRIVERS_PHY_H */