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b621370a MD |
1 | /* |
2 | * arch/sh/kernel/cpu/sh4a/clock-sh7724.c | |
3 | * | |
4 | * SH7724 clock framework support | |
5 | * | |
6 | * Copyright (C) 2009 Magnus Damm | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | #include <linux/init.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/io.h> | |
24 | #include <asm/clock.h> | |
25 | ||
26 | /* SH7724 registers */ | |
27 | #define FRQCRA 0xa4150000 | |
28 | #define FRQCRB 0xa4150004 | |
29 | #define VCLKCR 0xa4150048 | |
30 | #define FCLKACR 0xa4150008 | |
31 | #define FCLKBCR 0xa415000c | |
32 | #define IRDACLKCR 0xa4150018 | |
33 | #define PLLCR 0xa4150024 | |
34 | #define MSTPCR0 0xa4150030 | |
35 | #define MSTPCR1 0xa4150034 | |
36 | #define MSTPCR2 0xa4150038 | |
37 | #define SPUCLKCR 0xa415003c | |
38 | #define FLLFRQ 0xa4150050 | |
39 | #define LSTATS 0xa4150060 | |
40 | ||
41 | /* Fixed 32 KHz root clock for RTC and Power Management purposes */ | |
42 | static struct clk r_clk = { | |
43 | .name = "rclk", | |
44 | .id = -1, | |
45 | .rate = 32768, | |
46 | }; | |
47 | ||
48 | /* | |
49 | * Default rate for the root input clock, reset this with clk_set_rate() | |
50 | * from the platform code. | |
51 | */ | |
52 | struct clk extal_clk = { | |
53 | .name = "extal", | |
54 | .id = -1, | |
55 | .rate = 33333333, | |
56 | }; | |
57 | ||
58 | /* The fll multiplies the 32khz r_clk, may be used instead of extal */ | |
59 | static unsigned long fll_recalc(struct clk *clk) | |
60 | { | |
61 | unsigned long mult = 0; | |
62 | unsigned long div = 1; | |
63 | ||
64 | if (__raw_readl(PLLCR) & 0x1000) | |
65 | mult = __raw_readl(FLLFRQ) & 0x3ff; | |
66 | ||
67 | if (__raw_readl(FLLFRQ) & 0x4000) | |
68 | div = 2; | |
69 | ||
70 | return (clk->parent->rate * mult) / div; | |
71 | } | |
72 | ||
73 | static struct clk_ops fll_clk_ops = { | |
74 | .recalc = fll_recalc, | |
75 | }; | |
76 | ||
77 | static struct clk fll_clk = { | |
78 | .name = "fll_clk", | |
79 | .id = -1, | |
80 | .ops = &fll_clk_ops, | |
81 | .parent = &r_clk, | |
82 | .flags = CLK_ENABLE_ON_INIT, | |
83 | }; | |
84 | ||
85 | static unsigned long pll_recalc(struct clk *clk) | |
86 | { | |
87 | unsigned long mult = 1; | |
88 | ||
89 | if (__raw_readl(PLLCR) & 0x4000) | |
90 | mult = (((__raw_readl(FRQCRA) >> 24) & 0x3f) + 1) * 2; | |
91 | ||
92 | return clk->parent->rate * mult; | |
93 | } | |
94 | ||
95 | static struct clk_ops pll_clk_ops = { | |
96 | .recalc = pll_recalc, | |
97 | }; | |
98 | ||
99 | static struct clk pll_clk = { | |
100 | .name = "pll_clk", | |
101 | .id = -1, | |
102 | .ops = &pll_clk_ops, | |
103 | .flags = CLK_ENABLE_ON_INIT, | |
104 | }; | |
105 | ||
106 | /* A fixed divide-by-3 block use by the div6 clocks */ | |
107 | static unsigned long div3_recalc(struct clk *clk) | |
108 | { | |
109 | return clk->parent->rate / 3; | |
110 | } | |
111 | ||
112 | static struct clk_ops div3_clk_ops = { | |
113 | .recalc = div3_recalc, | |
114 | }; | |
115 | ||
116 | static struct clk div3_clk = { | |
117 | .name = "div3_clk", | |
118 | .id = -1, | |
119 | .ops = &div3_clk_ops, | |
120 | .parent = &pll_clk, | |
121 | }; | |
122 | ||
123 | struct clk *main_clks[] = { | |
124 | &r_clk, | |
125 | &extal_clk, | |
126 | &fll_clk, | |
127 | &pll_clk, | |
128 | &div3_clk, | |
129 | }; | |
130 | ||
131 | static int divisors[] = { 2, 0, 4, 6, 8, 12, 16, 0, 24, 32, 36, 48, 0, 72 }; | |
132 | ||
133 | static struct clk_div_mult_table div4_table = { | |
134 | .divisors = divisors, | |
135 | .nr_divisors = ARRAY_SIZE(divisors), | |
136 | }; | |
137 | ||
138 | enum { DIV4_I, DIV4_SH, DIV4_B, DIV4_P, DIV4_M1, DIV4_NR }; | |
139 | ||
140 | #define DIV4(_str, _reg, _bit, _mask, _flags) \ | |
141 | SH_CLK_DIV4(_str, &pll_clk, _reg, _bit, _mask, _flags) | |
142 | ||
143 | struct clk div4_clks[DIV4_NR] = { | |
144 | [DIV4_I] = DIV4("cpu_clk", FRQCRA, 20, 0x2f7d, CLK_ENABLE_ON_INIT), | |
145 | [DIV4_SH] = DIV4("shyway_clk", FRQCRA, 12, 0x2f7c, CLK_ENABLE_ON_INIT), | |
146 | [DIV4_B] = DIV4("bus_clk", FRQCRA, 8, 0x2f7c, CLK_ENABLE_ON_INIT), | |
147 | [DIV4_P] = DIV4("peripheral_clk", FRQCRA, 0, 0x2f7c, 0), | |
148 | [DIV4_M1] = DIV4("vpu_clk", FRQCRB, 4, 0x2f7c, 0), | |
149 | }; | |
150 | ||
151 | struct clk div6_clks[] = { | |
152 | SH_CLK_DIV6("video_clk", &div3_clk, VCLKCR, 0), | |
153 | SH_CLK_DIV6("fsia_clk", &div3_clk, FCLKACR, 0), | |
154 | SH_CLK_DIV6("fsib_clk", &div3_clk, FCLKBCR, 0), | |
155 | SH_CLK_DIV6("irda_clk", &div3_clk, IRDACLKCR, 0), | |
156 | SH_CLK_DIV6("spu_clk", &div3_clk, SPUCLKCR, 0), | |
157 | }; | |
158 | ||
159 | #define MSTP(_str, _parent, _reg, _bit, _force_on, _need_cpg, _need_ram) \ | |
160 | SH_CLK_MSTP32(_str, -1, _parent, _reg, _bit, _force_on * CLK_ENABLE_ON_INIT) | |
161 | ||
162 | static struct clk mstp_clks[] = { | |
163 | MSTP("tlb0", &div4_clks[DIV4_I], MSTPCR0, 31, 1, 1, 0), | |
164 | MSTP("ic0", &div4_clks[DIV4_I], MSTPCR0, 30, 1, 1, 0), | |
165 | MSTP("oc0", &div4_clks[DIV4_I], MSTPCR0, 29, 1, 1, 0), | |
166 | MSTP("rs0", &div4_clks[DIV4_B], MSTPCR0, 28, 1, 1, 0), | |
167 | MSTP("ilmem0", &div4_clks[DIV4_I], MSTPCR0, 27, 1, 1, 0), | |
168 | MSTP("l2c0", &div4_clks[DIV4_SH], MSTPCR0, 26, 1, 1, 0), | |
169 | MSTP("fpu0", &div4_clks[DIV4_I], MSTPCR0, 24, 1, 1, 0), | |
170 | MSTP("intc0", &div4_clks[DIV4_P], MSTPCR0, 22, 1, 1, 0), | |
171 | MSTP("dmac0", &div4_clks[DIV4_B], MSTPCR0, 21, 0, 1, 1), | |
172 | MSTP("sh0", &div4_clks[DIV4_SH], MSTPCR0, 20, 0, 1, 0), | |
173 | MSTP("hudi0", &div4_clks[DIV4_P], MSTPCR0, 19, 0, 1, 0), | |
174 | MSTP("ubc0", &div4_clks[DIV4_I], MSTPCR0, 17, 0, 1, 0), | |
175 | MSTP("tmu0", &div4_clks[DIV4_P], MSTPCR0, 15, 0, 1, 0), | |
176 | MSTP("cmt0", &r_clk, MSTPCR0, 14, 0, 0, 0), | |
177 | MSTP("rwdt0", &r_clk, MSTPCR0, 13, 0, 0, 0), | |
178 | MSTP("dmac1", &div4_clks[DIV4_B], MSTPCR0, 12, 0, 1, 1), | |
179 | MSTP("tmu1", &div4_clks[DIV4_P], MSTPCR0, 10, 0, 1, 0), | |
180 | MSTP("scif0", &div4_clks[DIV4_P], MSTPCR0, 9, 0, 1, 0), | |
181 | MSTP("scif1", &div4_clks[DIV4_P], MSTPCR0, 8, 0, 1, 0), | |
182 | MSTP("scif2", &div4_clks[DIV4_P], MSTPCR0, 7, 0, 1, 0), | |
183 | MSTP("scif3", &div4_clks[DIV4_B], MSTPCR0, 6, 0, 1, 0), | |
184 | MSTP("scif4", &div4_clks[DIV4_B], MSTPCR0, 5, 0, 1, 0), | |
185 | MSTP("scif5", &div4_clks[DIV4_B], MSTPCR0, 4, 0, 1, 0), | |
186 | MSTP("msiof0", &div4_clks[DIV4_B], MSTPCR0, 2, 0, 1, 0), | |
187 | MSTP("msiof1", &div4_clks[DIV4_B], MSTPCR0, 1, 0, 1, 0), | |
188 | ||
189 | MSTP("keysc0", &r_clk, MSTPCR1, 12, 0, 0, 0), | |
190 | MSTP("rtc0", &r_clk, MSTPCR1, 11, 0, 0, 0), | |
191 | MSTP("i2c0", &div4_clks[DIV4_P], MSTPCR1, 9, 0, 1, 0), | |
192 | MSTP("i2c1", &div4_clks[DIV4_P], MSTPCR1, 8, 0, 1, 0), | |
193 | ||
194 | MSTP("mmc0", &div4_clks[DIV4_B], MSTPCR2, 29, 0, 1, 0), | |
195 | MSTP("eth0", &div4_clks[DIV4_B], MSTPCR2, 28, 0, 1, 0), | |
196 | MSTP("atapi0", &div4_clks[DIV4_B], MSTPCR2, 26, 0, 1, 0), | |
197 | MSTP("tpu0", &div4_clks[DIV4_B], MSTPCR2, 25, 0, 1, 0), | |
198 | MSTP("irda0", &div4_clks[DIV4_P], MSTPCR2, 24, 0, 1, 0), | |
199 | MSTP("tsif0", &div4_clks[DIV4_B], MSTPCR2, 22, 0, 1, 0), | |
200 | MSTP("usb1", &div4_clks[DIV4_B], MSTPCR2, 21, 0, 1, 1), | |
201 | MSTP("usb0", &div4_clks[DIV4_B], MSTPCR2, 20, 0, 1, 1), | |
202 | MSTP("2dg0", &div4_clks[DIV4_B], MSTPCR2, 19, 0, 1, 1), | |
203 | MSTP("sdhi0", &div4_clks[DIV4_B], MSTPCR2, 18, 0, 1, 0), | |
204 | MSTP("sdhi1", &div4_clks[DIV4_B], MSTPCR2, 17, 0, 1, 0), | |
205 | MSTP("veu1", &div4_clks[DIV4_B], MSTPCR2, 15, 1, 1, 1), | |
206 | MSTP("ceu1", &div4_clks[DIV4_B], MSTPCR2, 13, 0, 1, 1), | |
207 | MSTP("beu1", &div4_clks[DIV4_B], MSTPCR2, 12, 0, 1, 1), | |
208 | MSTP("2ddmac0", &div4_clks[DIV4_SH], MSTPCR2, 10, 0, 1, 1), | |
209 | MSTP("spu0", &div4_clks[DIV4_B], MSTPCR2, 9, 0, 1, 0), | |
210 | MSTP("jpu0", &div4_clks[DIV4_B], MSTPCR2, 6, 1, 1, 1), | |
211 | MSTP("vou0", &div4_clks[DIV4_B], MSTPCR2, 5, 0, 1, 1), | |
212 | MSTP("beu0", &div4_clks[DIV4_B], MSTPCR2, 4, 0, 1, 1), | |
213 | MSTP("ceu0", &div4_clks[DIV4_B], MSTPCR2, 3, 0, 1, 1), | |
214 | MSTP("veu0", &div4_clks[DIV4_B], MSTPCR2, 2, 1, 1, 1), | |
215 | MSTP("vpu0", &div4_clks[DIV4_B], MSTPCR2, 1, 1, 1, 1), | |
216 | MSTP("lcdc0", &div4_clks[DIV4_B], MSTPCR2, 0, 0, 1, 1), | |
217 | }; | |
218 | ||
219 | int __init arch_clk_init(void) | |
220 | { | |
221 | int k, ret = 0; | |
222 | ||
223 | /* autodetect extal or fll configuration */ | |
224 | if (__raw_readl(PLLCR) & 0x1000) | |
225 | pll_clk.parent = &fll_clk; | |
226 | else | |
227 | pll_clk.parent = &extal_clk; | |
228 | ||
229 | for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++) | |
230 | ret = clk_register(main_clks[k]); | |
231 | ||
232 | if (!ret) | |
233 | ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table); | |
234 | ||
235 | if (!ret) | |
236 | ret = sh_clk_div6_register(div6_clks, ARRAY_SIZE(div6_clks)); | |
237 | ||
238 | if (!ret) | |
239 | ret = sh_clk_mstp32_register(mstp_clks, ARRAY_SIZE(mstp_clks)); | |
240 | ||
241 | return ret; | |
242 | } |