1 /*
2  * arch/sh/kernel/cpu/sh4a/clock-sh7734.c
3  *
4  * Clock framework for SH7734
5  *
6  * Copyright (C) 2011, 2012 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
7  * Copyright (C) 2011, 2012 Renesas Solutions Corp.
8  *
9  * This file is subject to the terms and conditions of the GNU General Public
10  * License.  See the file "COPYING" in the main directory of this archive
11  * for more details.
12  */
13 
14 #include <linux/init.h>
15 #include <linux/kernel.h>
16 #include <linux/io.h>
17 #include <linux/clkdev.h>
18 #include <linux/delay.h>
19 #include <asm/clock.h>
20 #include <asm/freq.h>
21 
22 static struct clk extal_clk = {
23 	.rate       = 33333333,
24 };
25 
26 #define MODEMR          (0xFFCC0020)
27 #define MODEMR_MASK     (0x6)
28 #define MODEMR_533MHZ   (0x2)
29 
30 static unsigned long pll_recalc(struct clk *clk)
31 {
32 	int mode = 12;
33 	u32 r = __raw_readl(MODEMR);
34 
35 	if ((r & MODEMR_MASK) & MODEMR_533MHZ)
36 		mode = 16;
37 
38 	return clk->parent->rate * mode;
39 }
40 
41 static struct sh_clk_ops pll_clk_ops = {
42 	.recalc		= pll_recalc,
43 };
44 
45 static struct clk pll_clk = {
46 	.ops        = &pll_clk_ops,
47 	.parent     = &extal_clk,
48 	.flags      = CLK_ENABLE_ON_INIT,
49 };
50 
51 static struct clk *main_clks[] = {
52 	&extal_clk,
53 	&pll_clk,
54 };
55 
56 static int multipliers[] = { 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
57 static int divisors[] = { 1, 3, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24 };
58 
59 static struct clk_div_mult_table div4_div_mult_table = {
60 	.divisors = divisors,
61 	.nr_divisors = ARRAY_SIZE(divisors),
62 	.multipliers = multipliers,
63 	.nr_multipliers = ARRAY_SIZE(multipliers),
64 };
65 
66 static struct clk_div4_table div4_table = {
67 	.div_mult_table = &div4_div_mult_table,
68 };
69 
70 enum { DIV4_I, DIV4_S, DIV4_B, DIV4_M, DIV4_S1, DIV4_P, DIV4_NR };
71 
72 #define DIV4(_reg, _bit, _mask, _flags) \
73 	SH_CLK_DIV4(&pll_clk, _reg, _bit, _mask, _flags)
74 
75 struct clk div4_clks[DIV4_NR] = {
76 	[DIV4_I] = DIV4(FRQMR1, 28, 0x0003, CLK_ENABLE_ON_INIT),
77 	[DIV4_S] = DIV4(FRQMR1, 20, 0x000C, CLK_ENABLE_ON_INIT),
78 	[DIV4_B] = DIV4(FRQMR1, 16, 0x0140, CLK_ENABLE_ON_INIT),
79 	[DIV4_M] = DIV4(FRQMR1, 12, 0x0004, CLK_ENABLE_ON_INIT),
80 	[DIV4_S1] = DIV4(FRQMR1, 4, 0x0030, CLK_ENABLE_ON_INIT),
81 	[DIV4_P] = DIV4(FRQMR1, 0, 0x0140, CLK_ENABLE_ON_INIT),
82 };
83 
84 #define MSTPCR0	0xFFC80030
85 #define MSTPCR1	0xFFC80034
86 #define MSTPCR3	0xFFC8003C
87 
88 enum {
89 	MSTP030, MSTP029, /* IIC */
90 	MSTP026, MSTP025, MSTP024, /* SCIF */
91 	MSTP023,
92 	MSTP022, MSTP021,
93 	MSTP019, /* HSCIF */
94 	MSTP016, MSTP015, MSTP014, /* TMU / TIMER */
95 	MSTP012, MSTP011, MSTP010, MSTP009, MSTP008, /* SSI */
96 	MSTP007, /* HSPI */
97 	MSTP115, /* ADMAC */
98 	MSTP114, /* GETHER */
99 	MSTP111, /* DMAC */
100 	MSTP109, /* VIDEOIN1 */
101 	MSTP108, /* VIDEOIN0 */
102 	MSTP107, /* RGPVBG */
103 	MSTP106, /* 2DG */
104 	MSTP103, /* VIEW */
105 	MSTP100, /* USB */
106 	MSTP331, /* MMC */
107 	MSTP330, /* MIMLB */
108 	MSTP323, /* SDHI0 */
109 	MSTP322, /* SDHI1 */
110 	MSTP321, /* SDHI2 */
111 	MSTP320, /* RQSPI */
112 	MSTP319, /* SRC0 */
113 	MSTP318, /* SRC1 */
114 	MSTP317, /* RSPI */
115 	MSTP316, /* RCAN0 */
116 	MSTP315, /* RCAN1 */
117 	MSTP314, /* FLTCL */
118 	MSTP313, /* ADC */
119 	MSTP312, /* MTU */
120 	MSTP304, /* IE-BUS */
121 	MSTP303, /* RTC */
122 	MSTP302, /* HIF */
123 	MSTP301, /* STIF0 */
124 	MSTP300, /* STIF1 */
125 	MSTP_NR };
126 
127 static struct clk mstp_clks[MSTP_NR] = {
128 	/* MSTPCR0 */
129 	[MSTP030] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 30, 0),
130 	[MSTP029] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 29, 0),
131 	[MSTP026] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 26, 0),
132 	[MSTP025] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 25, 0),
133 	[MSTP024] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 24, 0),
134 	[MSTP023] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 23, 0),
135 	[MSTP022] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 22, 0),
136 	[MSTP021] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 21, 0),
137 	[MSTP019] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 19, 0),
138 	[MSTP016] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 16, 0),
139 	[MSTP015] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 15, 0),
140 	[MSTP014] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 14, 0),
141 	[MSTP012] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 12, 0),
142 	[MSTP011] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 11, 0),
143 	[MSTP010] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 10, 0),
144 	[MSTP009] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 9, 0),
145 	[MSTP008] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 8, 0),
146 	[MSTP007] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 7, 0),
147 
148 	/* MSTPCR1 */
149 	[MSTP115] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 15, 0),
150 	[MSTP114] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 14, 0),
151 	[MSTP111] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 11, 0),
152 	[MSTP109] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 9, 0),
153 	[MSTP108] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 8, 0),
154 	[MSTP107] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 7, 0),
155 	[MSTP106] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 6, 0),
156 	[MSTP103] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 3, 0),
157 	[MSTP100] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 0, 0),
158 
159 	/* MSTPCR3 */
160 	[MSTP331] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 31, 0),
161 	[MSTP330] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 30, 0),
162 	[MSTP323] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 23, 0),
163 	[MSTP322] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 22, 0),
164 	[MSTP321] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 21, 0),
165 	[MSTP320] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 20, 0),
166 	[MSTP319] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 19, 0),
167 	[MSTP318] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 18, 0),
168 	[MSTP317] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 17, 0),
169 	[MSTP316] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 16, 0),
170 	[MSTP315] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 15, 0),
171 	[MSTP314] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 14, 0),
172 	[MSTP313] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 13, 0),
173 	[MSTP312] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 12, 0),
174 	[MSTP304] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3,  4, 0),
175 	[MSTP303] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3,  3, 0),
176 	[MSTP302] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3,  2, 0),
177 	[MSTP301] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3,  1, 0),
178 	[MSTP300] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3,  0, 0),
179 };
180 
181 static struct clk_lookup lookups[] = {
182 	/* main clocks */
183 	CLKDEV_CON_ID("extal", &extal_clk),
184 	CLKDEV_CON_ID("pll_clk", &pll_clk),
185 
186 	/* clocks */
187 	CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]),
188 	CLKDEV_CON_ID("shyway_clk", &div4_clks[DIV4_S]),
189 	CLKDEV_CON_ID("ddr_clk", &div4_clks[DIV4_M]),
190 	CLKDEV_CON_ID("bus_clk", &div4_clks[DIV4_B]),
191 	CLKDEV_CON_ID("shyway_clk1", &div4_clks[DIV4_S1]),
192 	CLKDEV_CON_ID("peripheral_clk", &div4_clks[DIV4_P]),
193 
194 	/* MSTP32 clocks */
195 	CLKDEV_DEV_ID("i2c-sh7734.0", &mstp_clks[MSTP030]),
196 	CLKDEV_DEV_ID("i2c-sh7734.1", &mstp_clks[MSTP029]),
197 	CLKDEV_ICK_ID("sci_fck", "sh-sci.0", &mstp_clks[MSTP026]),
198 	CLKDEV_ICK_ID("sci_fck", "sh-sci.1", &mstp_clks[MSTP025]),
199 	CLKDEV_ICK_ID("sci_fck", "sh-sci.2", &mstp_clks[MSTP024]),
200 	CLKDEV_ICK_ID("sci_fck", "sh-sci.3", &mstp_clks[MSTP023]),
201 	CLKDEV_ICK_ID("sci_fck", "sh-sci.4", &mstp_clks[MSTP022]),
202 	CLKDEV_ICK_ID("sci_fck", "sh-sci.5", &mstp_clks[MSTP021]),
203 	CLKDEV_CON_ID("hscif", &mstp_clks[MSTP019]),
204 	CLKDEV_ICK_ID("fck", "sh-tmu.0", &mstp_clks[MSTP016]),
205 	CLKDEV_ICK_ID("fck", "sh-tmu.1", &mstp_clks[MSTP015]),
206 	CLKDEV_ICK_ID("fck", "sh-tmu.2", &mstp_clks[MSTP014]),
207 	CLKDEV_CON_ID("ssi0", &mstp_clks[MSTP012]),
208 	CLKDEV_CON_ID("ssi1", &mstp_clks[MSTP011]),
209 	CLKDEV_CON_ID("ssi2", &mstp_clks[MSTP010]),
210 	CLKDEV_CON_ID("ssi3", &mstp_clks[MSTP009]),
211 	CLKDEV_CON_ID("sss", &mstp_clks[MSTP008]),
212 	CLKDEV_CON_ID("hspi", &mstp_clks[MSTP007]),
213 	CLKDEV_CON_ID("usb_fck", &mstp_clks[MSTP100]),
214 	CLKDEV_CON_ID("videoin0", &mstp_clks[MSTP109]),
215 	CLKDEV_CON_ID("videoin1", &mstp_clks[MSTP108]),
216 	CLKDEV_CON_ID("rgpvg", &mstp_clks[MSTP107]),
217 	CLKDEV_CON_ID("2dg", &mstp_clks[MSTP106]),
218 	CLKDEV_CON_ID("view", &mstp_clks[MSTP103]),
219 
220 	CLKDEV_CON_ID("mmc0", &mstp_clks[MSTP331]),
221 	CLKDEV_CON_ID("mimlb0", &mstp_clks[MSTP330]),
222 	CLKDEV_CON_ID("sdhi0", &mstp_clks[MSTP323]),
223 	CLKDEV_CON_ID("sdhi1", &mstp_clks[MSTP322]),
224 	CLKDEV_CON_ID("sdhi2", &mstp_clks[MSTP321]),
225 	CLKDEV_CON_ID("rqspi0", &mstp_clks[MSTP320]),
226 	CLKDEV_CON_ID("src0", &mstp_clks[MSTP319]),
227 	CLKDEV_CON_ID("src1", &mstp_clks[MSTP318]),
228 	CLKDEV_CON_ID("rsp0", &mstp_clks[MSTP317]),
229 	CLKDEV_CON_ID("rcan0", &mstp_clks[MSTP316]),
230 	CLKDEV_CON_ID("rcan1", &mstp_clks[MSTP315]),
231 	CLKDEV_CON_ID("fltcl0", &mstp_clks[MSTP314]),
232 	CLKDEV_CON_ID("adc0", &mstp_clks[MSTP313]),
233 	CLKDEV_CON_ID("mtu0", &mstp_clks[MSTP312]),
234 	CLKDEV_CON_ID("iebus0", &mstp_clks[MSTP304]),
235 	CLKDEV_DEV_ID("sh7734-gether.0", &mstp_clks[MSTP114]),
236 	CLKDEV_CON_ID("rtc0", &mstp_clks[MSTP303]),
237 	CLKDEV_CON_ID("hif0", &mstp_clks[MSTP302]),
238 	CLKDEV_CON_ID("stif0", &mstp_clks[MSTP301]),
239 	CLKDEV_CON_ID("stif1", &mstp_clks[MSTP300]),
240 };
241 
242 int __init arch_clk_init(void)
243 {
244 	int i, ret = 0;
245 
246 	for (i = 0; i < ARRAY_SIZE(main_clks); i++)
247 		ret |= clk_register(main_clks[i]);
248 
249 	for (i = 0; i < ARRAY_SIZE(lookups); i++)
250 		clkdev_add(&lookups[i]);
251 
252 	if (!ret)
253 		ret = sh_clk_div4_register(div4_clks, ARRAY_SIZE(div4_clks),
254 			&div4_table);
255 
256 	if (!ret)
257 		ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);
258 
259 	return ret;
260 }
261