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c521dc02 MD |
1 | /* |
2 | * arch/sh/kernel/cpu/sh4a/clock-sh7723.c | |
3 | * | |
4 | * SH7723 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> | |
f4221802 PM |
24 | #include <linux/clk.h> |
25 | #include <asm/clkdev.h> | |
c521dc02 | 26 | #include <asm/clock.h> |
2094e504 MD |
27 | #include <asm/hwblk.h> |
28 | #include <cpu/sh7723.h> | |
c521dc02 MD |
29 | |
30 | /* SH7723 registers */ | |
31 | #define FRQCR 0xa4150000 | |
32 | #define VCLKCR 0xa4150004 | |
33 | #define SCLKACR 0xa4150008 | |
34 | #define SCLKBCR 0xa415000c | |
35 | #define IRDACLKCR 0xa4150018 | |
36 | #define PLLCR 0xa4150024 | |
c521dc02 MD |
37 | #define DLLFRQ 0xa4150050 |
38 | ||
39 | /* Fixed 32 KHz root clock for RTC and Power Management purposes */ | |
40 | static struct clk r_clk = { | |
c521dc02 MD |
41 | .rate = 32768, |
42 | }; | |
43 | ||
44 | /* | |
45 | * Default rate for the root input clock, reset this with clk_set_rate() | |
46 | * from the platform code. | |
47 | */ | |
48 | struct clk extal_clk = { | |
c521dc02 MD |
49 | .rate = 33333333, |
50 | }; | |
51 | ||
52 | /* The dll multiplies the 32khz r_clk, may be used instead of extal */ | |
53 | static unsigned long dll_recalc(struct clk *clk) | |
54 | { | |
55 | unsigned long mult; | |
56 | ||
57 | if (__raw_readl(PLLCR) & 0x1000) | |
58 | mult = __raw_readl(DLLFRQ); | |
59 | else | |
60 | mult = 0; | |
61 | ||
62 | return clk->parent->rate * mult; | |
63 | } | |
64 | ||
65 | static struct clk_ops dll_clk_ops = { | |
66 | .recalc = dll_recalc, | |
67 | }; | |
68 | ||
69 | static struct clk dll_clk = { | |
c521dc02 MD |
70 | .ops = &dll_clk_ops, |
71 | .parent = &r_clk, | |
72 | .flags = CLK_ENABLE_ON_INIT, | |
73 | }; | |
74 | ||
75 | static unsigned long pll_recalc(struct clk *clk) | |
76 | { | |
77 | unsigned long mult = 1; | |
78 | unsigned long div = 1; | |
79 | ||
80 | if (__raw_readl(PLLCR) & 0x4000) | |
81 | mult = (((__raw_readl(FRQCR) >> 24) & 0x1f) + 1); | |
82 | else | |
83 | div = 2; | |
84 | ||
85 | return (clk->parent->rate * mult) / div; | |
86 | } | |
87 | ||
88 | static struct clk_ops pll_clk_ops = { | |
89 | .recalc = pll_recalc, | |
90 | }; | |
91 | ||
92 | static struct clk pll_clk = { | |
c521dc02 MD |
93 | .ops = &pll_clk_ops, |
94 | .flags = CLK_ENABLE_ON_INIT, | |
95 | }; | |
96 | ||
97 | struct clk *main_clks[] = { | |
98 | &r_clk, | |
99 | &extal_clk, | |
100 | &dll_clk, | |
101 | &pll_clk, | |
102 | }; | |
103 | ||
104 | static int multipliers[] = { 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1 }; | |
105 | static int divisors[] = { 1, 3, 2, 5, 3, 4, 5, 6, 8, 10, 12, 16, 20 }; | |
106 | ||
0a5f337e | 107 | static struct clk_div_mult_table div4_div_mult_table = { |
c521dc02 MD |
108 | .divisors = divisors, |
109 | .nr_divisors = ARRAY_SIZE(divisors), | |
110 | .multipliers = multipliers, | |
111 | .nr_multipliers = ARRAY_SIZE(multipliers), | |
112 | }; | |
113 | ||
0a5f337e MD |
114 | static struct clk_div4_table div4_table = { |
115 | .div_mult_table = &div4_div_mult_table, | |
116 | }; | |
117 | ||
801cd56e | 118 | enum { DIV4_I, DIV4_U, DIV4_SH, DIV4_B, DIV4_B3, DIV4_P, DIV4_NR }; |
c521dc02 | 119 | |
914ebf0b MD |
120 | #define DIV4(_reg, _bit, _mask, _flags) \ |
121 | SH_CLK_DIV4(&pll_clk, _reg, _bit, _mask, _flags) | |
c521dc02 MD |
122 | |
123 | struct clk div4_clks[DIV4_NR] = { | |
914ebf0b MD |
124 | [DIV4_I] = DIV4(FRQCR, 20, 0x0dbf, CLK_ENABLE_ON_INIT), |
125 | [DIV4_U] = DIV4(FRQCR, 16, 0x0dbf, CLK_ENABLE_ON_INIT), | |
126 | [DIV4_SH] = DIV4(FRQCR, 12, 0x0dbf, CLK_ENABLE_ON_INIT), | |
127 | [DIV4_B] = DIV4(FRQCR, 8, 0x0dbf, CLK_ENABLE_ON_INIT), | |
128 | [DIV4_B3] = DIV4(FRQCR, 4, 0x0db4, CLK_ENABLE_ON_INIT), | |
129 | [DIV4_P] = DIV4(FRQCR, 0, 0x0dbf, 0), | |
801cd56e MD |
130 | }; |
131 | ||
132 | enum { DIV4_IRDA, DIV4_ENABLE_NR }; | |
133 | ||
134 | struct clk div4_enable_clks[DIV4_ENABLE_NR] = { | |
914ebf0b | 135 | [DIV4_IRDA] = DIV4(IRDACLKCR, 0, 0x0dbf, 0), |
c521dc02 MD |
136 | }; |
137 | ||
801cd56e MD |
138 | enum { DIV4_SIUA, DIV4_SIUB, DIV4_REPARENT_NR }; |
139 | ||
140 | struct clk div4_reparent_clks[DIV4_REPARENT_NR] = { | |
914ebf0b MD |
141 | [DIV4_SIUA] = DIV4(SCLKACR, 0, 0x0dbf, 0), |
142 | [DIV4_SIUB] = DIV4(SCLKBCR, 0, 0x0dbf, 0), | |
801cd56e | 143 | }; |
098ec49b MD |
144 | enum { DIV6_V, DIV6_NR }; |
145 | ||
146 | struct clk div6_clks[DIV6_NR] = { | |
9e1985e1 | 147 | [DIV6_V] = SH_CLK_DIV6(&pll_clk, VCLKCR, 0), |
c521dc02 MD |
148 | }; |
149 | ||
c521dc02 MD |
150 | static struct clk mstp_clks[] = { |
151 | /* See page 60 of Datasheet V1.0: Overview -> Block Diagram */ | |
08134c3c MD |
152 | SH_HWBLK_CLK(HWBLK_TLB, &div4_clks[DIV4_I], CLK_ENABLE_ON_INIT), |
153 | SH_HWBLK_CLK(HWBLK_IC, &div4_clks[DIV4_I], CLK_ENABLE_ON_INIT), | |
154 | SH_HWBLK_CLK(HWBLK_OC, &div4_clks[DIV4_I], CLK_ENABLE_ON_INIT), | |
155 | SH_HWBLK_CLK(HWBLK_L2C, &div4_clks[DIV4_SH], CLK_ENABLE_ON_INIT), | |
156 | SH_HWBLK_CLK(HWBLK_ILMEM, &div4_clks[DIV4_I], CLK_ENABLE_ON_INIT), | |
157 | SH_HWBLK_CLK(HWBLK_FPU, &div4_clks[DIV4_I], CLK_ENABLE_ON_INIT), | |
158 | SH_HWBLK_CLK(HWBLK_INTC, &div4_clks[DIV4_I], CLK_ENABLE_ON_INIT), | |
159 | SH_HWBLK_CLK(HWBLK_DMAC0, &div4_clks[DIV4_B], 0), | |
160 | SH_HWBLK_CLK(HWBLK_SHYWAY, &div4_clks[DIV4_SH], CLK_ENABLE_ON_INIT), | |
161 | SH_HWBLK_CLK(HWBLK_HUDI, &div4_clks[DIV4_P], 0), | |
162 | SH_HWBLK_CLK(HWBLK_UBC, &div4_clks[DIV4_I], 0), | |
163 | SH_HWBLK_CLK(HWBLK_TMU0, &div4_clks[DIV4_P], 0), | |
164 | SH_HWBLK_CLK(HWBLK_CMT, &r_clk, 0), | |
165 | SH_HWBLK_CLK(HWBLK_RWDT, &r_clk, 0), | |
166 | SH_HWBLK_CLK(HWBLK_DMAC1, &div4_clks[DIV4_B], 0), | |
167 | SH_HWBLK_CLK(HWBLK_TMU1, &div4_clks[DIV4_P], 0), | |
168 | SH_HWBLK_CLK(HWBLK_FLCTL, &div4_clks[DIV4_P], 0), | |
169 | SH_HWBLK_CLK(HWBLK_SCIF0, &div4_clks[DIV4_P], 0), | |
170 | SH_HWBLK_CLK(HWBLK_SCIF1, &div4_clks[DIV4_P], 0), | |
171 | SH_HWBLK_CLK(HWBLK_SCIF2, &div4_clks[DIV4_P], 0), | |
172 | SH_HWBLK_CLK(HWBLK_SCIF3, &div4_clks[DIV4_B], 0), | |
173 | SH_HWBLK_CLK(HWBLK_SCIF4, &div4_clks[DIV4_B], 0), | |
174 | SH_HWBLK_CLK(HWBLK_SCIF5, &div4_clks[DIV4_B], 0), | |
175 | SH_HWBLK_CLK(HWBLK_MSIOF0, &div4_clks[DIV4_B], 0), | |
176 | SH_HWBLK_CLK(HWBLK_MSIOF1, &div4_clks[DIV4_B], 0), | |
177 | SH_HWBLK_CLK(HWBLK_MERAM, &div4_clks[DIV4_SH], 0), | |
178 | ||
179 | SH_HWBLK_CLK(HWBLK_IIC, &div4_clks[DIV4_P], 0), | |
180 | SH_HWBLK_CLK(HWBLK_RTC, &r_clk, 0), | |
181 | ||
182 | SH_HWBLK_CLK(HWBLK_ATAPI, &div4_clks[DIV4_SH], 0), | |
183 | SH_HWBLK_CLK(HWBLK_ADC, &div4_clks[DIV4_P], 0), | |
184 | SH_HWBLK_CLK(HWBLK_TPU, &div4_clks[DIV4_B], 0), | |
185 | SH_HWBLK_CLK(HWBLK_IRDA, &div4_clks[DIV4_P], 0), | |
186 | SH_HWBLK_CLK(HWBLK_TSIF, &div4_clks[DIV4_B], 0), | |
187 | SH_HWBLK_CLK(HWBLK_ICB, &div4_clks[DIV4_B], CLK_ENABLE_ON_INIT), | |
188 | SH_HWBLK_CLK(HWBLK_SDHI0, &div4_clks[DIV4_B], 0), | |
189 | SH_HWBLK_CLK(HWBLK_SDHI1, &div4_clks[DIV4_B], 0), | |
190 | SH_HWBLK_CLK(HWBLK_KEYSC, &r_clk, 0), | |
191 | SH_HWBLK_CLK(HWBLK_USB, &div4_clks[DIV4_B], 0), | |
192 | SH_HWBLK_CLK(HWBLK_2DG, &div4_clks[DIV4_B], 0), | |
193 | SH_HWBLK_CLK(HWBLK_SIU, &div4_clks[DIV4_B], 0), | |
194 | SH_HWBLK_CLK(HWBLK_VEU2H1, &div4_clks[DIV4_B], 0), | |
195 | SH_HWBLK_CLK(HWBLK_VOU, &div4_clks[DIV4_B], 0), | |
196 | SH_HWBLK_CLK(HWBLK_BEU, &div4_clks[DIV4_B], 0), | |
197 | SH_HWBLK_CLK(HWBLK_CEU, &div4_clks[DIV4_B], 0), | |
198 | SH_HWBLK_CLK(HWBLK_VEU2H0, &div4_clks[DIV4_B], 0), | |
199 | SH_HWBLK_CLK(HWBLK_VPU, &div4_clks[DIV4_B], 0), | |
200 | SH_HWBLK_CLK(HWBLK_LCDC, &div4_clks[DIV4_B], 0), | |
c521dc02 MD |
201 | }; |
202 | ||
fd30401b MD |
203 | #define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk } |
204 | ||
f4221802 | 205 | static struct clk_lookup lookups[] = { |
00522ac3 MD |
206 | /* main clocks */ |
207 | CLKDEV_CON_ID("rclk", &r_clk), | |
208 | CLKDEV_CON_ID("extal", &extal_clk), | |
209 | CLKDEV_CON_ID("dll_clk", &dll_clk), | |
210 | CLKDEV_CON_ID("pll_clk", &pll_clk), | |
211 | ||
3f662349 MD |
212 | /* DIV4 clocks */ |
213 | CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]), | |
214 | CLKDEV_CON_ID("umem_clk", &div4_clks[DIV4_U]), | |
215 | CLKDEV_CON_ID("shyway_clk", &div4_clks[DIV4_SH]), | |
216 | CLKDEV_CON_ID("bus_clk", &div4_clks[DIV4_B]), | |
217 | CLKDEV_CON_ID("b3_clk", &div4_clks[DIV4_B3]), | |
218 | CLKDEV_CON_ID("peripheral_clk", &div4_clks[DIV4_P]), | |
219 | CLKDEV_CON_ID("irda_clk", &div4_enable_clks[DIV4_IRDA]), | |
220 | CLKDEV_CON_ID("siua_clk", &div4_reparent_clks[DIV4_SIUA]), | |
221 | CLKDEV_CON_ID("siub_clk", &div4_reparent_clks[DIV4_SIUB]), | |
222 | ||
098ec49b MD |
223 | /* DIV6 clocks */ |
224 | CLKDEV_CON_ID("video_clk", &div6_clks[DIV6_V]), | |
225 | ||
fd30401b MD |
226 | /* MSTP clocks */ |
227 | CLKDEV_CON_ID("tlb0", &mstp_clks[HWBLK_TLB]), | |
228 | CLKDEV_CON_ID("ic0", &mstp_clks[HWBLK_IC]), | |
229 | CLKDEV_CON_ID("oc0", &mstp_clks[HWBLK_OC]), | |
230 | CLKDEV_CON_ID("l2c0", &mstp_clks[HWBLK_L2C]), | |
231 | CLKDEV_CON_ID("ilmem0", &mstp_clks[HWBLK_ILMEM]), | |
232 | CLKDEV_CON_ID("fpu0", &mstp_clks[HWBLK_FPU]), | |
233 | CLKDEV_CON_ID("intc0", &mstp_clks[HWBLK_INTC]), | |
234 | CLKDEV_CON_ID("dmac0", &mstp_clks[HWBLK_DMAC0]), | |
235 | CLKDEV_CON_ID("sh0", &mstp_clks[HWBLK_SHYWAY]), | |
236 | CLKDEV_CON_ID("hudi0", &mstp_clks[HWBLK_HUDI]), | |
237 | CLKDEV_CON_ID("ubc0", &mstp_clks[HWBLK_UBC]), | |
f4221802 PM |
238 | { |
239 | /* TMU0 */ | |
240 | .dev_id = "sh_tmu.0", | |
241 | .con_id = "tmu_fck", | |
f3d51e13 | 242 | .clk = &mstp_clks[HWBLK_TMU0], |
f4221802 PM |
243 | }, { |
244 | /* TMU1 */ | |
245 | .dev_id = "sh_tmu.1", | |
246 | .con_id = "tmu_fck", | |
f3d51e13 | 247 | .clk = &mstp_clks[HWBLK_TMU0], |
f4221802 PM |
248 | }, { |
249 | /* TMU2 */ | |
250 | .dev_id = "sh_tmu.2", | |
251 | .con_id = "tmu_fck", | |
f3d51e13 | 252 | .clk = &mstp_clks[HWBLK_TMU0], |
fd30401b MD |
253 | }, |
254 | CLKDEV_CON_ID("cmt_fck", &mstp_clks[HWBLK_CMT]), | |
255 | CLKDEV_CON_ID("rwdt0", &mstp_clks[HWBLK_RWDT]), | |
256 | CLKDEV_CON_ID("dmac1", &mstp_clks[HWBLK_DMAC1]), | |
257 | { | |
f4221802 PM |
258 | /* TMU3 */ |
259 | .dev_id = "sh_tmu.3", | |
260 | .con_id = "tmu_fck", | |
f3d51e13 | 261 | .clk = &mstp_clks[HWBLK_TMU1], |
f4221802 PM |
262 | }, { |
263 | /* TMU4 */ | |
264 | .dev_id = "sh_tmu.4", | |
265 | .con_id = "tmu_fck", | |
f3d51e13 | 266 | .clk = &mstp_clks[HWBLK_TMU1], |
f4221802 PM |
267 | }, { |
268 | /* TMU5 */ | |
269 | .dev_id = "sh_tmu.5", | |
270 | .con_id = "tmu_fck", | |
f3d51e13 | 271 | .clk = &mstp_clks[HWBLK_TMU1], |
fd30401b MD |
272 | }, |
273 | CLKDEV_CON_ID("flctl0", &mstp_clks[HWBLK_FLCTL]), | |
274 | { | |
e4e06697 MD |
275 | /* SCIF0 */ |
276 | .dev_id = "sh-sci.0", | |
277 | .con_id = "sci_fck", | |
278 | .clk = &mstp_clks[HWBLK_SCIF0], | |
279 | }, { | |
280 | /* SCIF1 */ | |
281 | .dev_id = "sh-sci.1", | |
282 | .con_id = "sci_fck", | |
283 | .clk = &mstp_clks[HWBLK_SCIF1], | |
284 | }, { | |
285 | /* SCIF2 */ | |
286 | .dev_id = "sh-sci.2", | |
287 | .con_id = "sci_fck", | |
288 | .clk = &mstp_clks[HWBLK_SCIF2], | |
289 | }, { | |
290 | /* SCIF3 */ | |
291 | .dev_id = "sh-sci.3", | |
292 | .con_id = "sci_fck", | |
293 | .clk = &mstp_clks[HWBLK_SCIF3], | |
294 | }, { | |
295 | /* SCIF4 */ | |
296 | .dev_id = "sh-sci.4", | |
297 | .con_id = "sci_fck", | |
298 | .clk = &mstp_clks[HWBLK_SCIF4], | |
299 | }, { | |
300 | /* SCIF5 */ | |
301 | .dev_id = "sh-sci.5", | |
302 | .con_id = "sci_fck", | |
303 | .clk = &mstp_clks[HWBLK_SCIF5], | |
f4221802 | 304 | }, |
fd30401b MD |
305 | CLKDEV_CON_ID("msiof0", &mstp_clks[HWBLK_MSIOF0]), |
306 | CLKDEV_CON_ID("msiof1", &mstp_clks[HWBLK_MSIOF1]), | |
307 | CLKDEV_CON_ID("meram0", &mstp_clks[HWBLK_MERAM]), | |
308 | CLKDEV_CON_ID("i2c0", &mstp_clks[HWBLK_IIC]), | |
309 | CLKDEV_CON_ID("rtc0", &mstp_clks[HWBLK_RTC]), | |
310 | CLKDEV_CON_ID("atapi0", &mstp_clks[HWBLK_ATAPI]), | |
311 | CLKDEV_CON_ID("adc0", &mstp_clks[HWBLK_ADC]), | |
312 | CLKDEV_CON_ID("tpu0", &mstp_clks[HWBLK_TPU]), | |
313 | CLKDEV_CON_ID("irda0", &mstp_clks[HWBLK_IRDA]), | |
314 | CLKDEV_CON_ID("tsif0", &mstp_clks[HWBLK_TSIF]), | |
315 | CLKDEV_CON_ID("icb0", &mstp_clks[HWBLK_ICB]), | |
316 | CLKDEV_CON_ID("sdhi0", &mstp_clks[HWBLK_SDHI0]), | |
317 | CLKDEV_CON_ID("sdhi1", &mstp_clks[HWBLK_SDHI1]), | |
318 | CLKDEV_CON_ID("keysc0", &mstp_clks[HWBLK_KEYSC]), | |
319 | CLKDEV_CON_ID("usb0", &mstp_clks[HWBLK_USB]), | |
320 | CLKDEV_CON_ID("2dg0", &mstp_clks[HWBLK_2DG]), | |
321 | CLKDEV_CON_ID("siu0", &mstp_clks[HWBLK_SIU]), | |
322 | CLKDEV_CON_ID("veu1", &mstp_clks[HWBLK_VEU2H1]), | |
323 | CLKDEV_CON_ID("vou0", &mstp_clks[HWBLK_VOU]), | |
324 | CLKDEV_CON_ID("beu0", &mstp_clks[HWBLK_BEU]), | |
325 | CLKDEV_CON_ID("ceu0", &mstp_clks[HWBLK_CEU]), | |
326 | CLKDEV_CON_ID("veu0", &mstp_clks[HWBLK_VEU2H0]), | |
327 | CLKDEV_CON_ID("vpu0", &mstp_clks[HWBLK_VPU]), | |
328 | CLKDEV_CON_ID("lcdc0", &mstp_clks[HWBLK_LCDC]), | |
f4221802 PM |
329 | }; |
330 | ||
c521dc02 MD |
331 | int __init arch_clk_init(void) |
332 | { | |
333 | int k, ret = 0; | |
334 | ||
335 | /* autodetect extal or dll configuration */ | |
336 | if (__raw_readl(PLLCR) & 0x1000) | |
337 | pll_clk.parent = &dll_clk; | |
338 | else | |
339 | pll_clk.parent = &extal_clk; | |
340 | ||
341 | for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++) | |
f4221802 PM |
342 | ret |= clk_register(main_clks[k]); |
343 | ||
344 | clkdev_add_table(lookups, ARRAY_SIZE(lookups)); | |
c521dc02 MD |
345 | |
346 | if (!ret) | |
347 | ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table); | |
348 | ||
801cd56e MD |
349 | if (!ret) |
350 | ret = sh_clk_div4_enable_register(div4_enable_clks, | |
351 | DIV4_ENABLE_NR, &div4_table); | |
352 | ||
353 | if (!ret) | |
354 | ret = sh_clk_div4_reparent_register(div4_reparent_clks, | |
355 | DIV4_REPARENT_NR, &div4_table); | |
356 | ||
c521dc02 | 357 | if (!ret) |
098ec49b | 358 | ret = sh_clk_div6_register(div6_clks, DIV6_NR); |
c521dc02 MD |
359 | |
360 | if (!ret) | |
f3d51e13 | 361 | ret = sh_hwblk_clk_register(mstp_clks, HWBLK_NR); |
c521dc02 MD |
362 | |
363 | return ret; | |
364 | } |