summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-shmobile/clock-r8a7791.c
blob: c9a26f16ce5b68bb1fc01a9c036a8299262df0e7 (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
/*
 * r8a7791 clock framework support
 *
 * Copyright (C) 2013  Renesas Electronics Corporation
 * Copyright (C) 2013  Renesas Solutions Corp.
 * Copyright (C) 2013  Magnus Damm
 *
 * 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; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/sh_clk.h>
#include <linux/clkdev.h>
#include <mach/clock.h>
#include <mach/common.h>

/*
 *   MD		EXTAL		PLL0	PLL1	PLL3
 * 14 13 19	(MHz)		*1	*1
 *---------------------------------------------------
 * 0  0  0	15 x 1		x172/2	x208/2	x106
 * 0  0  1	15 x 1		x172/2	x208/2	x88
 * 0  1  0	20 x 1		x130/2	x156/2	x80
 * 0  1  1	20 x 1		x130/2	x156/2	x66
 * 1  0  0	26 / 2		x200/2	x240/2	x122
 * 1  0  1	26 / 2		x200/2	x240/2	x102
 * 1  1  0	30 / 2		x172/2	x208/2	x106
 * 1  1  1	30 / 2		x172/2	x208/2	x88
 *
 * *1 :	Table 7.6 indicates VCO ouput (PLLx = VCO/2)
 *	see "p1 / 2" on R8A7791_CLOCK_ROOT() below
 */

#define MD(nr)	(1 << nr)

#define CPG_BASE 0xe6150000
#define CPG_LEN 0x1000

#define SMSTPCR0	0xE6150130
#define SMSTPCR1	0xE6150134
#define SMSTPCR2	0xe6150138
#define SMSTPCR3	0xE615013C
#define SMSTPCR5	0xE6150144
#define SMSTPCR7	0xe615014c
#define SMSTPCR8	0xE6150990
#define SMSTPCR9	0xE6150994
#define SMSTPCR10	0xE6150998
#define SMSTPCR11	0xE615099C

#define MODEMR		0xE6160060
#define SDCKCR		0xE6150074
#define SD2CKCR		0xE6150078
#define SD3CKCR		0xE615007C
#define MMC0CKCR	0xE6150240
#define MMC1CKCR	0xE6150244
#define SSPCKCR		0xE6150248
#define SSPRSCKCR	0xE615024C

static struct clk_mapping cpg_mapping = {
	.phys   = CPG_BASE,
	.len    = CPG_LEN,
};

static struct clk extal_clk = {
	/* .rate will be updated on r8a7791_clock_init() */
	.mapping	= &cpg_mapping,
};

static struct sh_clk_ops followparent_clk_ops = {
	.recalc	= followparent_recalc,
};

static struct clk main_clk = {
	/* .parent will be set r8a73a4_clock_init */
	.ops	= &followparent_clk_ops,
};

/*
 * clock ratio of these clock will be updated
 * on r8a7791_clock_init()
 */
SH_FIXED_RATIO_CLK_SET(pll1_clk,		main_clk,	1, 1);
SH_FIXED_RATIO_CLK_SET(pll3_clk,		main_clk,	1, 1);

/* fixed ratio clock */
SH_FIXED_RATIO_CLK_SET(extal_div2_clk,		extal_clk,	1, 2);
SH_FIXED_RATIO_CLK_SET(cp_clk,			extal_clk,	1, 2);

SH_FIXED_RATIO_CLK_SET(pll1_div2_clk,		pll1_clk,	1, 2);
SH_FIXED_RATIO_CLK_SET(hp_clk,			pll1_clk,	1, 12);
SH_FIXED_RATIO_CLK_SET(p_clk,			pll1_clk,	1, 24);
SH_FIXED_RATIO_CLK_SET(rclk_clk,		pll1_clk,	1, (48 * 1024));
SH_FIXED_RATIO_CLK_SET(mp_clk,			pll1_div2_clk,	1, 15);

static struct clk *main_clks[] = {
	&extal_clk,
	&extal_div2_clk,
	&main_clk,
	&pll1_clk,
	&pll1_div2_clk,
	&pll3_clk,
	&hp_clk,
	&p_clk,
	&rclk_clk,
	&mp_clk,
	&cp_clk,
};

/* MSTP */
enum {
	MSTP721, MSTP720,
	MSTP719, MSTP718, MSTP715, MSTP714,
	MSTP216, MSTP207, MSTP206,
	MSTP204, MSTP203, MSTP202, MSTP1105, MSTP1106, MSTP1107,
	MSTP124,
	MSTP_NR
};

static struct clk mstp_clks[MSTP_NR] = {
	[MSTP721] = SH_CLK_MSTP32(&p_clk, SMSTPCR7, 21, 0), /* SCIF0 */
	[MSTP720] = SH_CLK_MSTP32(&p_clk, SMSTPCR7, 20, 0), /* SCIF1 */
	[MSTP719] = SH_CLK_MSTP32(&p_clk, SMSTPCR7, 19, 0), /* SCIF2 */
	[MSTP718] = SH_CLK_MSTP32(&p_clk, SMSTPCR7, 18, 0), /* SCIF3 */
	[MSTP715] = SH_CLK_MSTP32(&p_clk, SMSTPCR7, 15, 0), /* SCIF4 */
	[MSTP714] = SH_CLK_MSTP32(&p_clk, SMSTPCR7, 14, 0), /* SCIF5 */
	[MSTP216] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 16, 0), /* SCIFB2 */
	[MSTP207] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 7, 0), /* SCIFB1 */
	[MSTP206] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 6, 0), /* SCIFB0 */
	[MSTP204] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 4, 0), /* SCIFA0 */
	[MSTP203] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 3, 0), /* SCIFA1 */
	[MSTP202] = SH_CLK_MSTP32(&mp_clk, SMSTPCR2, 2, 0), /* SCIFA2 */
	[MSTP1105] = SH_CLK_MSTP32(&mp_clk, SMSTPCR11, 5, 0), /* SCIFA3 */
	[MSTP1106] = SH_CLK_MSTP32(&mp_clk, SMSTPCR11, 6, 0), /* SCIFA4 */
	[MSTP1107] = SH_CLK_MSTP32(&mp_clk, SMSTPCR11, 7, 0), /* SCIFA5 */
	[MSTP124] = SH_CLK_MSTP32(&rclk_clk, SMSTPCR1, 24, 0), /* CMT0 */
};

static struct clk_lookup lookups[] = {

	/* main clocks */
	CLKDEV_CON_ID("extal",		&extal_clk),
	CLKDEV_CON_ID("extal_div2",	&extal_div2_clk),
	CLKDEV_CON_ID("main",		&main_clk),
	CLKDEV_CON_ID("pll1",		&pll1_clk),
	CLKDEV_CON_ID("pll1_div2",	&pll1_div2_clk),
	CLKDEV_CON_ID("pll3",		&pll3_clk),
	CLKDEV_CON_ID("hp",		&hp_clk),
	CLKDEV_CON_ID("p",		&p_clk),
	CLKDEV_CON_ID("rclk",		&rclk_clk),
	CLKDEV_CON_ID("mp",		&mp_clk),
	CLKDEV_CON_ID("cp",		&cp_clk),
	CLKDEV_CON_ID("peripheral_clk", &hp_clk),

	/* MSTP */
	CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP204]), /* SCIFA0 */
	CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP203]), /* SCIFA1 */
	CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP206]), /* SCIFB0 */
	CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP207]), /* SCIFB1 */
	CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP216]), /* SCIFB2 */
	CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP202]), /* SCIFA2 */
	CLKDEV_DEV_ID("sh-sci.6", &mstp_clks[MSTP721]), /* SCIF0 */
	CLKDEV_DEV_ID("sh-sci.7", &mstp_clks[MSTP720]), /* SCIF1 */
	CLKDEV_DEV_ID("sh-sci.8", &mstp_clks[MSTP719]), /* SCIF2 */
	CLKDEV_DEV_ID("sh-sci.9", &mstp_clks[MSTP718]), /* SCIF3 */
	CLKDEV_DEV_ID("sh-sci.10", &mstp_clks[MSTP715]), /* SCIF4 */
	CLKDEV_DEV_ID("sh-sci.11", &mstp_clks[MSTP714]), /* SCIF5 */
	CLKDEV_DEV_ID("sh-sci.12", &mstp_clks[MSTP1105]), /* SCIFA3 */
	CLKDEV_DEV_ID("sh-sci.13", &mstp_clks[MSTP1106]), /* SCIFA4 */
	CLKDEV_DEV_ID("sh-sci.14", &mstp_clks[MSTP1107]), /* SCIFA5 */
	CLKDEV_DEV_ID("sh_cmt.0", &mstp_clks[MSTP124]),
};

#define R8A7791_CLOCK_ROOT(e, m, p0, p1, p30, p31)		\
	extal_clk.rate	= e * 1000 * 1000;			\
	main_clk.parent	= m;					\
	SH_CLK_SET_RATIO(&pll1_clk_ratio, p1 / 2, 1);		\
	if (mode & MD(19))					\
		SH_CLK_SET_RATIO(&pll3_clk_ratio, p31, 1);	\
	else							\
		SH_CLK_SET_RATIO(&pll3_clk_ratio, p30, 1)


void __init r8a7791_clock_init(void)
{
	void __iomem *modemr = ioremap_nocache(MODEMR, PAGE_SIZE);
	u32 mode;
	int k, ret = 0;

	BUG_ON(!modemr);
	mode = ioread32(modemr);
	iounmap(modemr);

	switch (mode & (MD(14) | MD(13))) {
	case 0:
		R8A7791_CLOCK_ROOT(15, &extal_clk, 172, 208, 106, 88);
		break;
	case MD(13):
		R8A7791_CLOCK_ROOT(20, &extal_clk, 130, 156, 80, 66);
		break;
	case MD(14):
		R8A7791_CLOCK_ROOT(26, &extal_div2_clk, 200, 240, 122, 102);
		break;
	case MD(13) | MD(14):
		R8A7791_CLOCK_ROOT(30, &extal_div2_clk, 172, 208, 106, 88);
		break;
	}

	for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
		ret = clk_register(main_clks[k]);

	if (!ret)
		ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);

	clkdev_add_table(lookups, ARRAY_SIZE(lookups));

	if (!ret)
		shmobile_clk_init();
	else
		goto epanic;

	return;

epanic:
	panic("failed to setup r8a7791 clocks\n");
}