summaryrefslogtreecommitdiff
path: root/include/generic-phy.h
blob: a17d900e4bd21f81401149ea9f4bb8110c7c62a0 (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
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
 * Written by Jean-Jacques Hiblot  <jjhiblot@ti.com>
 */

#ifndef __GENERIC_PHY_H
#define __GENERIC_PHY_H

#include <dm/ofnode.h>

struct ofnode_phandle_args;

/**
 * struct phy - A handle to (allowing control of) a single phy port.
 *
 * Clients provide storage for phy handles. The content of the structure is
 * managed solely by the PHY API and PHY drivers. A phy struct is
 * initialized by "get"ing the phy struct. The phy struct is passed to all
 * other phy APIs to identify which PHY port to operate upon.
 *
 * @dev: The device which implements the PHY port.
 * @id: The PHY ID within the provider.
 *
 */
struct phy {
	struct udevice *dev;
	unsigned long id;
};

/*
 * struct udevice_ops - set of function pointers for phy operations
 * @init: operation to be performed for initializing phy (optional)
 * @exit: operation to be performed while exiting (optional)
 * @reset: reset the phy (optional).
 * @power_on: powering on the phy (optional)
 * @power_off: powering off the phy (optional)
 */
struct phy_ops {
	/**
	 * of_xlate - Translate a client's device-tree (OF) phy specifier.
	 *
	 * The PHY core calls this function as the first step in implementing
	 * a client's generic_phy_get_by_*() call.
	 *
	 * If this function pointer is set to NULL, the PHY core will use a
	 * default implementation, which assumes #phy-cells = <0> or
	 * #phy-cells = <1>, and in the later case that the DT cell
	 * contains a simple integer PHY port ID.
	 *
	 * @phy:	The phy struct to hold the translation result.
	 * @args:	The phy specifier values from device tree.
	 * @return 0 if OK, or a negative error code.
	 */
	int	(*of_xlate)(struct phy *phy, struct ofnode_phandle_args *args);

	/**
	 * init - initialize the hardware.
	 *
	 * Hardware intialization should not be done in during probe() but
	 * should be implemented in this init() function. It could be starting
	 * PLL, taking a controller out of reset, routing, etc. This function
	 * is typically called only once per PHY port.
	 * If power_on() is not implemented, it must power up the phy.
	 *
	 * @phy:	the PHY port to initialize
	 * @return 0 if OK, or a negative error code.
	 */
	int	(*init)(struct phy *phy);

	/**
	* exit - de-initialize the PHY device
	*
	* Hardware de-intialization should be done here. Every step done in
	* init() should be undone here.
	* This could be used to suspend the phy to reduce power consumption or
	* to put the phy in a known condition before booting the OS (though it
	* is NOT called automatically before booting the OS)
	* If power_off() is not implemented, it must power down the phy.
	*
	* @phy:	PHY port to be de-initialized
	* @return 0 if OK, or a negative error code
	*/
	int	(*exit)(struct phy *phy);

	/**
	* reset - resets a PHY device without shutting down
	*
	* @phy:	PHY port to be reset
	*
	* During runtime, the PHY may need to be reset in order to
	* re-establish connection etc without being shut down or exit.
	*
	* @return 0 if OK, or a negative error code
	*/
	int	(*reset)(struct phy *phy);

	/**
	* power_on - power on a PHY device
	*
	* @phy:	PHY port to be powered on
	*
	* During runtime, the PHY may need to be powered on or off several
	* times. This function is used to power on the PHY. It relies on the
	* setup done in init(). If init() is not implemented, it must take care
	* of setting up the context (PLLs, ...)
	*
	* @return 0 if OK, or a negative error code
	*/
	int	(*power_on)(struct phy *phy);

	/**
	* power_off - power off a PHY device
	*
	* @phy:	PHY port to be powered off
	*
	* During runtime, the PHY may need to be powered on or off several
	* times. This function is used to power off the PHY. Except if
	* init()/deinit() are not implemented, it must not de-initialize
	* everything.
	*
	* @return 0 if OK, or a negative error code
	*/
	int	(*power_off)(struct phy *phy);

	/**
	* configure - configure a PHY device
	*
	* @phy:	PHY port to be configured
	* @params: PHY Parameters, underlying data is specific to the PHY function
	*
	* During runtime, the PHY may need to be configured for it's main function.
	* This function configures the PHY for it's main function following
	* power_on/off() after beeing initialized.
	*
	* @return 0 if OK, or a negative error code
	*/
	int	(*configure)(struct phy *phy, void *params);
};

/**
 * struct phy_bulk - A handle to (allowing control of) a bulk of phys.
 *
 * Consumers provide storage for the phy bulk. The content of the structure is
 * managed solely by the phy API. A phy bulk struct is initialized
 * by "get"ing the phy bulk struct.
 * The phy bulk struct is passed to all other bulk phy APIs to apply
 * the API to all the phy in the bulk struct.
 *
 * @phys: An array of phy handles.
 * @count: The number of phy handles in the phys array.
 */
struct phy_bulk {
	struct phy *phys;
	unsigned int count;
};

#ifdef CONFIG_PHY

/**
 * generic_phy_init() - initialize the PHY port
 *
 * @phy:	the PHY port to initialize
 * @return 0 if OK, or a negative error code
 */
int generic_phy_init(struct phy *phy);

/**
 * generic_phy_init() - de-initialize the PHY device
 *
 * @phy:	PHY port to be de-initialized
 * @return 0 if OK, or a negative error code
 */
int generic_phy_exit(struct phy *phy);

/**
 * generic_phy_reset() - resets a PHY device without shutting down
 *
 * @phy:	PHY port to be reset
 *@return 0 if OK, or a negative error code
 */
int generic_phy_reset(struct phy *phy);

/**
 * generic_phy_power_on() - power on a PHY device
 *
 * @phy:	PHY port to be powered on
 * @return 0 if OK, or a negative error code
 */
int generic_phy_power_on(struct phy *phy);

/**
 * generic_phy_power_off() - power off a PHY device
 *
 * @phy:	PHY port to be powered off
 * @return 0 if OK, or a negative error code
 */
int generic_phy_power_off(struct phy *phy);

/**
 * generic_phy_configure() - configure a PHY device
 *
 * @phy:	PHY port to be configured
 * @params: 	PHY Parameters, underlying data is specific to the PHY function
 * @return 0 if OK, or a negative error code
 */
int generic_phy_configure(struct phy *phy, void *params);


/**
 * generic_phy_get_by_index() - Get a PHY device by integer index.
 *
 * @user:	the client device
 * @index:	The index in the list of available PHYs
 * @phy:	A pointer to the PHY port
 *
 * This looks up a PHY device for a client device based on its position in the
 * list of the possible PHYs.
 *
 * example:
 * usb1: usb_otg_ss@xxx {
 *       compatible = "xxx";
 *       reg = <xxx>;
 *   .
 *   .
 *   phys = <&usb2_phy>, <&usb3_phy>;
 *   .
 *   .
 * };
 * the USB2 phy can be accessed by passing index '0' and the USB3 phy can
 * be accessed by passing index '1'
 *
 * @return 0 if OK, or a negative error code
 */
int generic_phy_get_by_index(struct udevice *user, int index,
			     struct phy *phy);

/**
 * generic_phy_get_by_index_nodev() - Get a PHY device by integer index
 * without a device
 *
 * @node:	The client ofnode.
 * @index:	The index in the list of available PHYs
 * @phy:	A pointer to the PHY port
 *
 * This is a version of generic_phy_get_by_index() that does not use a device.
 *
 * This looks up a PHY device for a client device based on its ofnode and on
 * its position in the list of the possible PHYs.
 *
 * example:
 * usb1: usb_otg_ss@xxx {
 *       compatible = "xxx";
 *       reg = <xxx>;
 *   .
 *   .
 *   phys = <&usb2_phy>, <&usb3_phy>;
 *   .
 *   .
 * };
 * the USB2 phy can be accessed by passing index '0' and the USB3 phy can
 * be accessed by passing index '1'
 *
 * @return 0 if OK, or a negative error code
 */
int generic_phy_get_by_index_nodev(ofnode node, int index, struct phy *phy);

/**
 * generic_phy_get_by_name() - Get a PHY device by its name.
 *
 * @user:	the client device
 * @phy_name:	The name of the PHY in the list of possible PHYs
 * @phy:	A pointer to the PHY port
 *
 * This looks up a PHY device for a client device in the
 * list of the possible PHYs based on its name.
 *
 * example:
 * usb1: usb_otg_ss@xxx {
 *       compatible = "xxx";
 *       reg = <xxx>;
 *   .
 *   .
 *   phys = <&usb2_phy>, <&usb3_phy>;
 *   phy-names = "usb2phy", "usb3phy";
 *   .
 *   .
 * };
 * the USB3 phy can be accessed using "usb3phy", and USB2 by using "usb2phy"
 *
 * @return 0 if OK, or a negative error code
 */
int generic_phy_get_by_name(struct udevice *user, const char *phy_name,
			    struct phy *phy);

/**
 * generic_phy_get_bulk - Get all phys of a device.
 *
 * This looks up and gets all phys of the consumer device; each device is
 * assumed to have n phys associated with it somehow, and this function finds
 * and gets all of them in a separate structure.
 *
 * @dev:	The consumer device.
 * @bulk	A pointer to a phy bulk struct to initialize.
 * @return 0 if OK, or a negative error code.
 */
int generic_phy_get_bulk(struct udevice *dev, struct phy_bulk *bulk);

/**
 * generic_phy_init_bulk() - Initialize all phys in a phy bulk struct.
 *
 * @bulk:	A phy bulk struct that was previously successfully requested
 *		by generic_phy_get_bulk().
 * @return 0 if OK, or negative error code.
 */
int generic_phy_init_bulk(struct phy_bulk *bulk);

/**
 * generic_phy_exit_bulk() - de-initialize all phys in a phy bulk struct.
 *
 * @bulk:	A phy bulk struct that was previously successfully requested
 *		by generic_phy_get_bulk().
 * @return 0 if OK, or negative error code.
 */
int generic_phy_exit_bulk(struct phy_bulk *bulk);

/**
 * generic_phy_power_on_bulk() - Power on all phys in a phy	bulk struct.
 *
 * @bulk:	A phy bulk struct that was previously successfully requested
 *		by generic_phy_get_bulk().
 * @return 0 if OK, or negative error code.
 */
int generic_phy_power_on_bulk(struct phy_bulk *bulk);

/**
 * generic_phy_power_off_bulk() - Power off all phys in a phy bulk struct.
 *
 * @bulk:	A phy bulk struct that was previously successfully requested
 *		by generic_phy_get_bulk().
 * @return 0 if OK, or negative error code.
 */
int generic_phy_power_off_bulk(struct phy_bulk *bulk);

#else /* CONFIG_PHY */

static inline int generic_phy_init(struct phy *phy)
{
	return 0;
}

static inline int generic_phy_exit(struct phy *phy)
{
	return 0;
}

static inline int generic_phy_reset(struct phy *phy)
{
	return 0;
}

static inline int generic_phy_power_on(struct phy *phy)
{
	return 0;
}

static inline int generic_phy_power_off(struct phy *phy)
{
	return 0;
}

static inline int generic_phy_get_by_index(struct udevice *user, int index,
			     struct phy *phy)
{
	return 0;
}

static inline int generic_phy_get_by_name(struct udevice *user, const char *phy_name,
			    struct phy *phy)
{
	return 0;
}

static inline int
generic_phy_get_bulk(struct udevice *dev, struct phy_bulk *bulk)
{
	return 0;
}

static inline int generic_phy_init_bulk(struct phy_bulk *bulk)
{
	return 0;
}

static inline int generic_phy_exit_bulk(struct phy_bulk *bulk)
{
	return 0;
}

static inline int generic_phy_power_on_bulk(struct phy_bulk *bulk)
{
	return 0;
}

static inline int generic_phy_power_off_bulk(struct phy_bulk *bulk)
{
	return 0;
}

#endif /* CONFIG_PHY */

/**
 * generic_phy_valid() - check if PHY port is valid
 *
 * @phy:	the PHY port to check
 * @return TRUE if valid, or FALSE
 */
static inline bool generic_phy_valid(struct phy *phy)
{
	return phy && phy->dev;
}

#endif /*__GENERIC_PHY_H */