Commit | Line | Data |
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1929cb34 | 1 | /* |
2 | * arch/sh/kernel/cpu/sh4a/clock-sh7722.c | |
3 | * | |
46e9371c | 4 | * SH7722 clock framework support |
1929cb34 | 5 | * |
46e9371c | 6 | * Copyright (C) 2009 Magnus Damm |
1929cb34 | 7 | * |
46e9371c MD |
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 | |
1929cb34 | 20 | */ |
21 | #include <linux/init.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/io.h> | |
e4e06697 | 24 | #include <asm/clkdev.h> |
1929cb34 | 25 | #include <asm/clock.h> |
a61c1a63 MD |
26 | #include <asm/hwblk.h> |
27 | #include <cpu/sh7722.h> | |
1929cb34 | 28 | |
46e9371c MD |
29 | /* SH7722 registers */ |
30 | #define FRQCR 0xa4150000 | |
31 | #define VCLKCR 0xa4150004 | |
32 | #define SCLKACR 0xa4150008 | |
33 | #define SCLKBCR 0xa415000c | |
34 | #define IRDACLKCR 0xa4150018 | |
35 | #define PLLCR 0xa4150024 | |
46e9371c MD |
36 | #define DLLFRQ 0xa4150050 |
37 | ||
38 | /* Fixed 32 KHz root clock for RTC and Power Management purposes */ | |
39 | static struct clk r_clk = { | |
40 | .name = "rclk", | |
41 | .id = -1, | |
42 | .rate = 32768, | |
1929cb34 | 43 | }; |
44 | ||
1929cb34 | 45 | /* |
46e9371c MD |
46 | * Default rate for the root input clock, reset this with clk_set_rate() |
47 | * from the platform code. | |
1929cb34 | 48 | */ |
46e9371c MD |
49 | struct clk extal_clk = { |
50 | .name = "extal", | |
51 | .id = -1, | |
52 | .rate = 33333333, | |
1929cb34 | 53 | }; |
54 | ||
46e9371c MD |
55 | /* The dll block multiplies the 32khz r_clk, may be used instead of extal */ |
56 | static unsigned long dll_recalc(struct clk *clk) | |
1929cb34 | 57 | { |
46e9371c | 58 | unsigned long mult; |
1929cb34 | 59 | |
46e9371c MD |
60 | if (__raw_readl(PLLCR) & 0x1000) |
61 | mult = __raw_readl(DLLFRQ); | |
1929cb34 | 62 | else |
46e9371c | 63 | mult = 0; |
1929cb34 | 64 | |
46e9371c | 65 | return clk->parent->rate * mult; |
1929cb34 | 66 | } |
67 | ||
46e9371c MD |
68 | static struct clk_ops dll_clk_ops = { |
69 | .recalc = dll_recalc, | |
1312994c MD |
70 | }; |
71 | ||
46e9371c MD |
72 | static struct clk dll_clk = { |
73 | .name = "dll_clk", | |
74 | .id = -1, | |
75 | .ops = &dll_clk_ops, | |
76 | .parent = &r_clk, | |
77 | .flags = CLK_ENABLE_ON_INIT, | |
78 | }; | |
1929cb34 | 79 | |
46e9371c | 80 | static unsigned long pll_recalc(struct clk *clk) |
1929cb34 | 81 | { |
46e9371c MD |
82 | unsigned long mult = 1; |
83 | unsigned long div = 1; | |
1929cb34 | 84 | |
46e9371c MD |
85 | if (__raw_readl(PLLCR) & 0x4000) |
86 | mult = (((__raw_readl(FRQCR) >> 24) & 0x1f) + 1); | |
87 | else | |
88 | div = 2; | |
1929cb34 | 89 | |
46e9371c | 90 | return (clk->parent->rate * mult) / div; |
1929cb34 | 91 | } |
92 | ||
46e9371c MD |
93 | static struct clk_ops pll_clk_ops = { |
94 | .recalc = pll_recalc, | |
1929cb34 | 95 | }; |
96 | ||
46e9371c MD |
97 | static struct clk pll_clk = { |
98 | .name = "pll_clk", | |
99 | .id = -1, | |
100 | .ops = &pll_clk_ops, | |
101 | .flags = CLK_ENABLE_ON_INIT, | |
1929cb34 | 102 | }; |
103 | ||
46e9371c MD |
104 | struct clk *main_clks[] = { |
105 | &r_clk, | |
106 | &extal_clk, | |
107 | &dll_clk, | |
108 | &pll_clk, | |
1929cb34 | 109 | }; |
110 | ||
46e9371c MD |
111 | static int multipliers[] = { 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1 }; |
112 | static int divisors[] = { 1, 3, 2, 5, 3, 4, 5, 6, 8, 10, 12, 16, 20 }; | |
1929cb34 | 113 | |
0a5f337e | 114 | static struct clk_div_mult_table div4_div_mult_table = { |
46e9371c MD |
115 | .divisors = divisors, |
116 | .nr_divisors = ARRAY_SIZE(divisors), | |
117 | .multipliers = multipliers, | |
118 | .nr_multipliers = ARRAY_SIZE(multipliers), | |
7c7e02a2 | 119 | }; |
1312994c | 120 | |
0a5f337e MD |
121 | static struct clk_div4_table div4_table = { |
122 | .div_mult_table = &div4_div_mult_table, | |
123 | }; | |
124 | ||
46e9371c MD |
125 | #define DIV4(_str, _reg, _bit, _mask, _flags) \ |
126 | SH_CLK_DIV4(_str, &pll_clk, _reg, _bit, _mask, _flags) | |
1929cb34 | 127 | |
31c3af50 GL |
128 | enum { DIV4_I, DIV4_U, DIV4_SH, DIV4_B, DIV4_B3, DIV4_P, DIV4_NR }; |
129 | ||
46e9371c MD |
130 | struct clk div4_clks[DIV4_NR] = { |
131 | [DIV4_I] = DIV4("cpu_clk", FRQCR, 20, 0x1fef, CLK_ENABLE_ON_INIT), | |
132 | [DIV4_U] = DIV4("umem_clk", FRQCR, 16, 0x1fff, CLK_ENABLE_ON_INIT), | |
133 | [DIV4_SH] = DIV4("shyway_clk", FRQCR, 12, 0x1fff, CLK_ENABLE_ON_INIT), | |
134 | [DIV4_B] = DIV4("bus_clk", FRQCR, 8, 0x1fff, CLK_ENABLE_ON_INIT), | |
135 | [DIV4_B3] = DIV4("b3_clk", FRQCR, 4, 0x1fff, CLK_ENABLE_ON_INIT), | |
136 | [DIV4_P] = DIV4("peripheral_clk", FRQCR, 0, 0x1fff, 0), | |
31c3af50 GL |
137 | }; |
138 | ||
139 | enum { DIV4_IRDA, DIV4_ENABLE_NR }; | |
140 | ||
141 | struct clk div4_enable_clks[DIV4_ENABLE_NR] = { | |
142 | [DIV4_IRDA] = DIV4("irda_clk", IRDACLKCR, 0, 0x1fff, 0), | |
143 | }; | |
144 | ||
145 | enum { DIV4_SIUA, DIV4_SIUB, DIV4_REPARENT_NR }; | |
146 | ||
147 | struct clk div4_reparent_clks[DIV4_REPARENT_NR] = { | |
46e9371c MD |
148 | [DIV4_SIUA] = DIV4("siua_clk", SCLKACR, 0, 0x1fff, 0), |
149 | [DIV4_SIUB] = DIV4("siub_clk", SCLKBCR, 0, 0x1fff, 0), | |
1929cb34 | 150 | }; |
151 | ||
46e9371c MD |
152 | struct clk div6_clks[] = { |
153 | SH_CLK_DIV6("video_clk", &pll_clk, VCLKCR, 0), | |
1929cb34 | 154 | }; |
155 | ||
a61c1a63 MD |
156 | #define R_CLK &r_clk |
157 | #define P_CLK &div4_clks[DIV4_P] | |
158 | #define B_CLK &div4_clks[DIV4_B] | |
159 | #define U_CLK &div4_clks[DIV4_U] | |
aea167cb | 160 | |
f3d51e13 | 161 | static struct clk mstp_clks[HWBLK_NR] = { |
a61c1a63 MD |
162 | SH_HWBLK_CLK("uram0", -1, U_CLK, HWBLK_URAM, CLK_ENABLE_ON_INIT), |
163 | SH_HWBLK_CLK("xymem0", -1, B_CLK, HWBLK_XYMEM, CLK_ENABLE_ON_INIT), | |
04b17317 PM |
164 | SH_HWBLK_CLK("tmu_fck", -1, P_CLK, HWBLK_TMU, 0), |
165 | SH_HWBLK_CLK("cmt_fck", -1, R_CLK, HWBLK_CMT, 0), | |
a61c1a63 MD |
166 | SH_HWBLK_CLK("rwdt0", -1, R_CLK, HWBLK_RWDT, 0), |
167 | SH_HWBLK_CLK("flctl0", -1, P_CLK, HWBLK_FLCTL, 0), | |
e4e06697 MD |
168 | SH_HWBLK_CLK("sci_fck", -1, P_CLK, HWBLK_SCIF0, 0), |
169 | SH_HWBLK_CLK("sci_fck", -1, P_CLK, HWBLK_SCIF1, 0), | |
170 | SH_HWBLK_CLK("sci_fck", -1, P_CLK, HWBLK_SCIF2, 0), | |
a61c1a63 MD |
171 | |
172 | SH_HWBLK_CLK("i2c0", -1, P_CLK, HWBLK_IIC, 0), | |
173 | SH_HWBLK_CLK("rtc0", -1, R_CLK, HWBLK_RTC, 0), | |
174 | ||
175 | SH_HWBLK_CLK("sdhi0", -1, P_CLK, HWBLK_SDHI, 0), | |
176 | SH_HWBLK_CLK("keysc0", -1, R_CLK, HWBLK_KEYSC, 0), | |
177 | SH_HWBLK_CLK("usbf0", -1, P_CLK, HWBLK_USBF, 0), | |
178 | SH_HWBLK_CLK("2dg0", -1, B_CLK, HWBLK_2DG, 0), | |
179 | SH_HWBLK_CLK("siu0", -1, B_CLK, HWBLK_SIU, 0), | |
180 | SH_HWBLK_CLK("vou0", -1, B_CLK, HWBLK_VOU, 0), | |
cc58f597 | 181 | SH_HWBLK_CLK("jpu0", -1, B_CLK, HWBLK_JPU, 0), |
a61c1a63 MD |
182 | SH_HWBLK_CLK("beu0", -1, B_CLK, HWBLK_BEU, 0), |
183 | SH_HWBLK_CLK("ceu0", -1, B_CLK, HWBLK_CEU, 0), | |
cc58f597 MD |
184 | SH_HWBLK_CLK("veu0", -1, B_CLK, HWBLK_VEU, 0), |
185 | SH_HWBLK_CLK("vpu0", -1, B_CLK, HWBLK_VPU, 0), | |
a61c1a63 | 186 | SH_HWBLK_CLK("lcdc0", -1, P_CLK, HWBLK_LCDC, 0), |
1929cb34 | 187 | }; |
188 | ||
e4e06697 MD |
189 | static struct clk_lookup lookups[] = { |
190 | { | |
191 | /* TMU0 */ | |
192 | .dev_id = "sh_tmu.0", | |
193 | .con_id = "tmu_fck", | |
194 | .clk = &mstp_clks[HWBLK_TMU], | |
195 | }, { | |
196 | /* TMU1 */ | |
197 | .dev_id = "sh_tmu.1", | |
198 | .con_id = "tmu_fck", | |
199 | .clk = &mstp_clks[HWBLK_TMU], | |
200 | }, { | |
201 | /* TMU2 */ | |
202 | .dev_id = "sh_tmu.2", | |
203 | .con_id = "tmu_fck", | |
204 | .clk = &mstp_clks[HWBLK_TMU], | |
205 | }, { | |
206 | /* SCIF0 */ | |
207 | .dev_id = "sh-sci.0", | |
208 | .con_id = "sci_fck", | |
209 | .clk = &mstp_clks[HWBLK_SCIF0], | |
210 | }, { | |
211 | /* SCIF1 */ | |
212 | .dev_id = "sh-sci.1", | |
213 | .con_id = "sci_fck", | |
214 | .clk = &mstp_clks[HWBLK_SCIF1], | |
215 | }, { | |
216 | /* SCIF2 */ | |
217 | .dev_id = "sh-sci.2", | |
218 | .con_id = "sci_fck", | |
219 | .clk = &mstp_clks[HWBLK_SCIF2], | |
220 | }, | |
221 | }; | |
222 | ||
dfbbbe92 | 223 | int __init arch_clk_init(void) |
1929cb34 | 224 | { |
46e9371c | 225 | int k, ret = 0; |
1929cb34 | 226 | |
46e9371c MD |
227 | /* autodetect extal or dll configuration */ |
228 | if (__raw_readl(PLLCR) & 0x1000) | |
229 | pll_clk.parent = &dll_clk; | |
230 | else | |
231 | pll_clk.parent = &extal_clk; | |
253b0887 | 232 | |
46e9371c MD |
233 | for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++) |
234 | ret = clk_register(main_clks[k]); | |
7c7e02a2 | 235 | |
e4e06697 MD |
236 | clkdev_add_table(lookups, ARRAY_SIZE(lookups)); |
237 | ||
46e9371c MD |
238 | if (!ret) |
239 | ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table); | |
7c7e02a2 | 240 | |
31c3af50 GL |
241 | if (!ret) |
242 | ret = sh_clk_div4_enable_register(div4_enable_clks, | |
243 | DIV4_ENABLE_NR, &div4_table); | |
244 | ||
245 | if (!ret) | |
246 | ret = sh_clk_div4_reparent_register(div4_reparent_clks, | |
247 | DIV4_REPARENT_NR, &div4_table); | |
248 | ||
46e9371c MD |
249 | if (!ret) |
250 | ret = sh_clk_div6_register(div6_clks, ARRAY_SIZE(div6_clks)); | |
aea167cb | 251 | |
46e9371c | 252 | if (!ret) |
f3d51e13 | 253 | ret = sh_hwblk_clk_register(mstp_clks, HWBLK_NR); |
0c0daec7 | 254 | |
46e9371c | 255 | return ret; |
1929cb34 | 256 | } |