summaryrefslogtreecommitdiffstats
path: root/kernel/drivers/clk/samsung/clk.h
blob: e4c75383cea718c7fb563db70fbdd8452b1f9bd8 (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
/*
 * Copyright (c) 2013 Samsung Electronics Co., Ltd.
 * Copyright (c) 2013 Linaro Ltd.
 * Author: Thomas Abraham <thomas.ab@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Common Clock Framework support for all Samsung platforms
*/

#ifndef __SAMSUNG_CLK_H
#define __SAMSUNG_CLK_H

#include <linux/clkdev.h>
#include <linux/clk-provider.h>
#include "clk-pll.h"

/**
 * struct samsung_clk_provider: information about clock provider
 * @reg_base: virtual address for the register base.
 * @clk_data: holds clock related data like clk* and number of clocks.
 * @lock: maintains exclusion between callbacks for a given clock-provider.
 */
struct samsung_clk_provider {
	void __iomem *reg_base;
	struct clk_onecell_data clk_data;
	spinlock_t lock;
};

/**
 * struct samsung_clock_alias: information about mux clock
 * @id: platform specific id of the clock.
 * @dev_name: name of the device to which this clock belongs.
 * @alias: optional clock alias name to be assigned to this clock.
 */
struct samsung_clock_alias {
	unsigned int		id;
	const char		*dev_name;
	const char		*alias;
};

#define ALIAS(_id, dname, a)	\
	{							\
		.id		= _id,				\
		.dev_name	= dname,			\
		.alias		= a,				\
	}

#define MHZ (1000 * 1000)

/**
 * struct samsung_fixed_rate_clock: information about fixed-rate clock
 * @id: platform specific id of the clock.
 * @name: name of this fixed-rate clock.
 * @parent_name: optional parent clock name.
 * @flags: optional fixed-rate clock flags.
 * @fixed-rate: fixed clock rate of this clock.
 */
struct samsung_fixed_rate_clock {
	unsigned int		id;
	char			*name;
	const char		*parent_name;
	unsigned long		flags;
	unsigned long		fixed_rate;
};

#define FRATE(_id, cname, pname, f, frate)		\
	{						\
		.id		= _id,			\
		.name		= cname,		\
		.parent_name	= pname,		\
		.flags		= f,			\
		.fixed_rate	= frate,		\
	}

/*
 * struct samsung_fixed_factor_clock: information about fixed-factor clock
 * @id: platform specific id of the clock.
 * @name: name of this fixed-factor clock.
 * @parent_name: parent clock name.
 * @mult: fixed multiplication factor.
 * @div: fixed division factor.
 * @flags: optional fixed-factor clock flags.
 */
struct samsung_fixed_factor_clock {
	unsigned int		id;
	char			*name;
	const char		*parent_name;
	unsigned long		mult;
	unsigned long		div;
	unsigned long		flags;
};

#define FFACTOR(_id, cname, pname, m, d, f)		\
	{						\
		.id		= _id,			\
		.name		= cname,		\
		.parent_name	= pname,		\
		.mult		= m,			\
		.div		= d,			\
		.flags		= f,			\
	}

/**
 * struct samsung_mux_clock: information about mux clock
 * @id: platform specific id of the clock.
 * @dev_name: name of the device to which this clock belongs.
 * @name: name of this mux clock.
 * @parent_names: array of pointer to parent clock names.
 * @num_parents: number of parents listed in @parent_names.
 * @flags: optional flags for basic clock.
 * @offset: offset of the register for configuring the mux.
 * @shift: starting bit location of the mux control bit-field in @reg.
 * @width: width of the mux control bit-field in @reg.
 * @mux_flags: flags for mux-type clock.
 * @alias: optional clock alias name to be assigned to this clock.
 */
struct samsung_mux_clock {
	unsigned int		id;
	const char		*dev_name;
	const char		*name;
	const char		**parent_names;
	u8			num_parents;
	unsigned long		flags;
	unsigned long		offset;
	u8			shift;
	u8			width;
	u8			mux_flags;
	const char		*alias;
};

#define __MUX(_id, dname, cname, pnames, o, s, w, f, mf, a)	\
	{							\
		.id		= _id,				\
		.dev_name	= dname,			\
		.name		= cname,			\
		.parent_names	= pnames,			\
		.num_parents	= ARRAY_SIZE(pnames),		\
		.flags		= (f) | CLK_SET_RATE_NO_REPARENT, \
		.offset		= o,				\
		.shift		= s,				\
		.width		= w,				\
		.mux_flags	= mf,				\
		.alias		= a,				\
	}

#define MUX(_id, cname, pnames, o, s, w)			\
	__MUX(_id, NULL, cname, pnames, o, s, w, 0, 0, NULL)

#define MUX_A(_id, cname, pnames, o, s, w, a)			\
	__MUX(_id, NULL, cname, pnames, o, s, w, 0, 0, a)

#define MUX_F(_id, cname, pnames, o, s, w, f, mf)		\
	__MUX(_id, NULL, cname, pnames, o, s, w, f, mf, NULL)

#define MUX_FA(_id, cname, pnames, o, s, w, f, mf, a)		\
	__MUX(_id, NULL, cname, pnames, o, s, w, f, mf, a)

/**
 * @id: platform specific id of the clock.
 * struct samsung_div_clock: information about div clock
 * @dev_name: name of the device to which this clock belongs.
 * @name: name of this div clock.
 * @parent_name: name of the parent clock.
 * @flags: optional flags for basic clock.
 * @offset: offset of the register for configuring the div.
 * @shift: starting bit location of the div control bit-field in @reg.
 * @div_flags: flags for div-type clock.
 * @alias: optional clock alias name to be assigned to this clock.
 */
struct samsung_div_clock {
	unsigned int		id;
	const char		*dev_name;
	const char		*name;
	const char		*parent_name;
	unsigned long		flags;
	unsigned long		offset;
	u8			shift;
	u8			width;
	u8			div_flags;
	const char		*alias;
	struct clk_div_table	*table;
};

#define __DIV(_id, dname, cname, pname, o, s, w, f, df, a, t)	\
	{							\
		.id		= _id,				\
		.dev_name	= dname,			\
		.name		= cname,			\
		.parent_name	= pname,			\
		.flags		= f,				\
		.offset		= o,				\
		.shift		= s,				\
		.width		= w,				\
		.div_flags	= df,				\
		.alias		= a,				\
		.table		= t,				\
	}

#define DIV(_id, cname, pname, o, s, w)				\
	__DIV(_id, NULL, cname, pname, o, s, w, 0, 0, NULL, NULL)

#define DIV_A(_id, cname, pname, o, s, w, a)			\
	__DIV(_id, NULL, cname, pname, o, s, w, 0, 0, a, NULL)

#define DIV_F(_id, cname, pname, o, s, w, f, df)		\
	__DIV(_id, NULL, cname, pname, o, s, w, f, df, NULL, NULL)

#define DIV_T(_id, cname, pname, o, s, w, t)			\
	__DIV(_id, NULL, cname, pname, o, s, w, 0, 0, NULL, t)

/**
 * struct samsung_gate_clock: information about gate clock
 * @id: platform specific id of the clock.
 * @dev_name: name of the device to which this clock belongs.
 * @name: name of this gate clock.
 * @parent_name: name of the parent clock.
 * @flags: optional flags for basic clock.
 * @offset: offset of the register for configuring the gate.
 * @bit_idx: bit index of the gate control bit-field in @reg.
 * @gate_flags: flags for gate-type clock.
 * @alias: optional clock alias name to be assigned to this clock.
 */
struct samsung_gate_clock {
	unsigned int		id;
	const char		*dev_name;
	const char		*name;
	const char		*parent_name;
	unsigned long		flags;
	unsigned long		offset;
	u8			bit_idx;
	u8			gate_flags;
	const char		*alias;
};

#define __GATE(_id, dname, cname, pname, o, b, f, gf, a)	\
	{							\
		.id		= _id,				\
		.dev_name	= dname,			\
		.name		= cname,			\
		.parent_name	= pname,			\
		.flags		= f,				\
		.offset		= o,				\
		.bit_idx	= b,				\
		.gate_flags	= gf,				\
		.alias		= a,				\
	}

#define GATE(_id, cname, pname, o, b, f, gf)			\
	__GATE(_id, NULL, cname, pname, o, b, f, gf, NULL)

#define GATE_A(_id, cname, pname, o, b, f, gf, a)		\
	__GATE(_id, NULL, cname, pname, o, b, f, gf, a)

#define GATE_D(_id, dname, cname, pname, o, b, f, gf)		\
	__GATE(_id, dname, cname, pname, o, b, f, gf, NULL)

#define GATE_DA(_id, dname, cname, pname, o, b, f, gf, a)	\
	__GATE(_id, dname, cname, pname, o, b, f, gf, a)

#define PNAME(x) static const char *x[] __initdata

/**
 * struct samsung_clk_reg_dump: register dump of clock controller registers.
 * @offset: clock register offset from the controller base address.
 * @value: the value to be register at offset.
 */
struct samsung_clk_reg_dump {
	u32	offset;
	u32	value;
};

/**
 * struct samsung_pll_clock: information about pll clock
 * @id: platform specific id of the clock.
 * @dev_name: name of the device to which this clock belongs.
 * @name: name of this pll clock.
 * @parent_name: name of the parent clock.
 * @flags: optional flags for basic clock.
 * @con_offset: offset of the register for configuring the PLL.
 * @lock_offset: offset of the register for locking the PLL.
 * @type: Type of PLL to be registered.
 * @alias: optional clock alias name to be assigned to this clock.
 */
struct samsung_pll_clock {
	unsigned int		id;
	const char		*dev_name;
	const char		*name;
	const char		*parent_name;
	unsigned long		flags;
	int			con_offset;
	int			lock_offset;
	enum samsung_pll_type	type;
	const struct samsung_pll_rate_table *rate_table;
	const char              *alias;
};

#define __PLL(_typ, _id, _dname, _name, _pname, _flags, _lock, _con,	\
		_rtable, _alias)					\
	{								\
		.id		= _id,					\
		.type		= _typ,					\
		.dev_name	= _dname,				\
		.name		= _name,				\
		.parent_name	= _pname,				\
		.flags		= CLK_GET_RATE_NOCACHE,			\
		.con_offset	= _con,					\
		.lock_offset	= _lock,				\
		.rate_table	= _rtable,				\
		.alias		= _alias,				\
	}

#define PLL(_typ, _id, _name, _pname, _lock, _con, _rtable)	\
	__PLL(_typ, _id, NULL, _name, _pname, CLK_GET_RATE_NOCACHE,	\
		_lock, _con, _rtable, _name)

#define PLL_A(_typ, _id, _name, _pname, _lock, _con, _alias, _rtable) \
	__PLL(_typ, _id, NULL, _name, _pname, CLK_GET_RATE_NOCACHE,	\
		_lock, _con, _rtable, _alias)

struct samsung_clock_reg_cache {
	struct list_head node;
	void __iomem *reg_base;
	struct samsung_clk_reg_dump *rdump;
	unsigned int rd_num;
};

struct samsung_cmu_info {
	/* list of pll clocks and respective count */
	struct samsung_pll_clock *pll_clks;
	unsigned int nr_pll_clks;
	/* list of mux clocks and respective count */
	struct samsung_mux_clock *mux_clks;
	unsigned int nr_mux_clks;
	/* list of div clocks and respective count */
	struct samsung_div_clock *div_clks;
	unsigned int nr_div_clks;
	/* list of gate clocks and respective count */
	struct samsung_gate_clock *gate_clks;
	unsigned int nr_gate_clks;
	/* list of fixed clocks and respective count */
	struct samsung_fixed_rate_clock *fixed_clks;
	unsigned int nr_fixed_clks;
	/* list of fixed factor clocks and respective count */
	struct samsung_fixed_factor_clock *fixed_factor_clks;
	unsigned int nr_fixed_factor_clks;
	/* total number of clocks with IDs assigned*/
	unsigned int nr_clk_ids;

	/* list and number of clocks registers */
	unsigned long *clk_regs;
	unsigned int nr_clk_regs;
};

extern struct samsung_clk_provider *__init samsung_clk_init(
			struct device_node *np, void __iomem *base,
			unsigned long nr_clks);
extern void __init samsung_clk_of_add_provider(struct device_node *np,
			struct samsung_clk_provider *ctx);
extern void __init samsung_clk_of_register_fixed_ext(
			struct samsung_clk_provider *ctx,
			struct samsung_fixed_rate_clock *fixed_rate_clk,
			unsigned int nr_fixed_rate_clk,
			const struct of_device_id *clk_matches);

extern void samsung_clk_add_lookup(struct samsung_clk_provider *ctx,
			struct clk *clk, unsigned int id);

extern void samsung_clk_register_alias(struct samsung_clk_provider *ctx,
			struct samsung_clock_alias *list,
			unsigned int nr_clk);
extern void __init samsung_clk_register_fixed_rate(
			struct samsung_clk_provider *ctx,
			struct samsung_fixed_rate_clock *clk_list,
			unsigned int nr_clk);
extern void __init samsung_clk_register_fixed_factor(
			struct samsung_clk_provider *ctx,
			struct samsung_fixed_factor_clock *list,
			unsigned int nr_clk);
extern void __init samsung_clk_register_mux(struct samsung_clk_provider *ctx,
			struct samsung_mux_clock *clk_list,
			unsigned int nr_clk);
extern void __init samsung_clk_register_div(struct samsung_clk_provider *ctx,
			struct samsung_div_clock *clk_list,
			unsigned int nr_clk);
extern void __init samsung_clk_register_gate(struct samsung_clk_provider *ctx,
			struct samsung_gate_clock *clk_list,
			unsigned int nr_clk);
extern void __init samsung_clk_register_pll(struct samsung_clk_provider *ctx,
			struct samsung_pll_clock *pll_list,
			unsigned int nr_clk, void __iomem *base);

extern struct samsung_clk_provider __init *samsung_cmu_register_one(
			struct device_node *,
			struct samsung_cmu_info *);

extern unsigned long _get_rate(const char *clk_name);

extern void samsung_clk_save(void __iomem *base,
			struct samsung_clk_reg_dump *rd,
			unsigned int num_regs);
extern void samsung_clk_restore(void __iomem *base,
			const struct samsung_clk_reg_dump *rd,
			unsigned int num_regs);
extern struct samsung_clk_reg_dump *samsung_clk_alloc_reg_dump(
			const unsigned long *rdump,
			unsigned long nr_rdump);

#endif /* __SAMSUNG_CLK_H */