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6d9598e2 MD |
1 | /* |
2 | * sh73a0 clock framework support | |
3 | * | |
4 | * Copyright (C) 2010 Magnus Damm | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | #include <linux/init.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/io.h> | |
22 | #include <linux/sh_clk.h> | |
6ef9f6fd | 23 | #include <linux/clkdev.h> |
6d9598e2 | 24 | #include <mach/common.h> |
6d9598e2 | 25 | |
f6d84f4a MD |
26 | #define FRQCRA 0xe6150000 |
27 | #define FRQCRB 0xe6150004 | |
28 | #define FRQCRD 0xe61500e4 | |
29 | #define VCLKCR1 0xe6150008 | |
30 | #define VCLKCR2 0xe615000C | |
31 | #define VCLKCR3 0xe615001C | |
32 | #define ZBCKCR 0xe6150010 | |
33 | #define FLCKCR 0xe6150014 | |
34 | #define SD0CKCR 0xe6150074 | |
35 | #define SD1CKCR 0xe6150078 | |
36 | #define SD2CKCR 0xe615007C | |
37 | #define FSIACKCR 0xe6150018 | |
38 | #define FSIBCKCR 0xe6150090 | |
39 | #define SUBCKCR 0xe6150080 | |
40 | #define SPUACKCR 0xe6150084 | |
41 | #define SPUVCKCR 0xe6150094 | |
42 | #define MSUCKCR 0xe6150088 | |
43 | #define HSICKCR 0xe615008C | |
44 | #define MFCK1CR 0xe6150098 | |
45 | #define MFCK2CR 0xe615009C | |
46 | #define DSITCKCR 0xe6150060 | |
47 | #define DSI0PCKCR 0xe6150064 | |
48 | #define DSI1PCKCR 0xe6150068 | |
49 | #define DSI0PHYCR 0xe615006C | |
50 | #define DSI1PHYCR 0xe6150070 | |
51 | #define PLLECR 0xe61500d0 | |
52 | #define PLL0CR 0xe61500d8 | |
53 | #define PLL1CR 0xe6150028 | |
54 | #define PLL2CR 0xe615002c | |
55 | #define PLL3CR 0xe61500dc | |
6d9598e2 MD |
56 | #define SMSTPCR0 0xe6150130 |
57 | #define SMSTPCR1 0xe6150134 | |
58 | #define SMSTPCR2 0xe6150138 | |
59 | #define SMSTPCR3 0xe615013c | |
60 | #define SMSTPCR4 0xe6150140 | |
61 | #define SMSTPCR5 0xe6150144 | |
f6d84f4a | 62 | #define CKSCR 0xe61500c0 |
6d9598e2 MD |
63 | |
64 | /* Fixed 32 KHz root clock from EXTALR pin */ | |
65 | static struct clk r_clk = { | |
66 | .rate = 32768, | |
67 | }; | |
68 | ||
f6d84f4a MD |
69 | /* |
70 | * 26MHz default rate for the EXTAL1 root input clock. | |
71 | * If needed, reset this with clk_set_rate() from the platform code. | |
72 | */ | |
73 | struct clk sh73a0_extal1_clk = { | |
74 | .rate = 26000000, | |
75 | }; | |
76 | ||
77 | /* | |
78 | * 48MHz default rate for the EXTAL2 root input clock. | |
79 | * If needed, reset this with clk_set_rate() from the platform code. | |
80 | */ | |
81 | struct clk sh73a0_extal2_clk = { | |
82 | .rate = 48000000, | |
83 | }; | |
84 | ||
85 | /* A fixed divide-by-2 block */ | |
86 | static unsigned long div2_recalc(struct clk *clk) | |
87 | { | |
88 | return clk->parent->rate / 2; | |
89 | } | |
90 | ||
91 | static struct clk_ops div2_clk_ops = { | |
92 | .recalc = div2_recalc, | |
93 | }; | |
94 | ||
95 | /* Divide extal1 by two */ | |
96 | static struct clk extal1_div2_clk = { | |
97 | .ops = &div2_clk_ops, | |
98 | .parent = &sh73a0_extal1_clk, | |
99 | }; | |
100 | ||
101 | /* Divide extal2 by two */ | |
102 | static struct clk extal2_div2_clk = { | |
103 | .ops = &div2_clk_ops, | |
104 | .parent = &sh73a0_extal2_clk, | |
105 | }; | |
106 | ||
107 | static struct clk_ops main_clk_ops = { | |
108 | .recalc = followparent_recalc, | |
109 | }; | |
110 | ||
111 | /* Main clock */ | |
112 | static struct clk main_clk = { | |
113 | .ops = &main_clk_ops, | |
114 | }; | |
115 | ||
116 | /* PLL0, PLL1, PLL2, PLL3 */ | |
117 | static unsigned long pll_recalc(struct clk *clk) | |
118 | { | |
119 | unsigned long mult = 1; | |
120 | ||
121 | if (__raw_readl(PLLECR) & (1 << clk->enable_bit)) | |
122 | mult = (((__raw_readl(clk->enable_reg) >> 24) & 0x3f) + 1); | |
123 | ||
124 | return clk->parent->rate * mult; | |
125 | } | |
126 | ||
127 | static struct clk_ops pll_clk_ops = { | |
128 | .recalc = pll_recalc, | |
129 | }; | |
130 | ||
131 | static struct clk pll0_clk = { | |
132 | .ops = &pll_clk_ops, | |
133 | .flags = CLK_ENABLE_ON_INIT, | |
134 | .parent = &main_clk, | |
135 | .enable_reg = (void __iomem *)PLL0CR, | |
136 | .enable_bit = 0, | |
6d9598e2 MD |
137 | }; |
138 | ||
f6d84f4a MD |
139 | static struct clk pll1_clk = { |
140 | .ops = &pll_clk_ops, | |
141 | .flags = CLK_ENABLE_ON_INIT, | |
142 | .parent = &main_clk, | |
143 | .enable_reg = (void __iomem *)PLL1CR, | |
144 | .enable_bit = 1, | |
145 | }; | |
146 | ||
147 | static struct clk pll2_clk = { | |
148 | .ops = &pll_clk_ops, | |
149 | .flags = CLK_ENABLE_ON_INIT, | |
150 | .parent = &main_clk, | |
151 | .enable_reg = (void __iomem *)PLL2CR, | |
152 | .enable_bit = 2, | |
153 | }; | |
154 | ||
155 | static struct clk pll3_clk = { | |
156 | .ops = &pll_clk_ops, | |
157 | .flags = CLK_ENABLE_ON_INIT, | |
158 | .parent = &main_clk, | |
159 | .enable_reg = (void __iomem *)PLL3CR, | |
160 | .enable_bit = 3, | |
161 | }; | |
162 | ||
163 | /* Divide PLL1 by two */ | |
164 | static struct clk pll1_div2_clk = { | |
165 | .ops = &div2_clk_ops, | |
166 | .parent = &pll1_clk, | |
b028f94b YT |
167 | }; |
168 | ||
6d9598e2 MD |
169 | static struct clk *main_clks[] = { |
170 | &r_clk, | |
f6d84f4a MD |
171 | &sh73a0_extal1_clk, |
172 | &sh73a0_extal2_clk, | |
173 | &extal1_div2_clk, | |
174 | &extal2_div2_clk, | |
175 | &main_clk, | |
176 | &pll0_clk, | |
177 | &pll1_clk, | |
178 | &pll2_clk, | |
179 | &pll3_clk, | |
180 | &pll1_div2_clk, | |
181 | }; | |
182 | ||
183 | static void div4_kick(struct clk *clk) | |
184 | { | |
185 | unsigned long value; | |
186 | ||
187 | /* set KICK bit in FRQCRB to update hardware setting */ | |
188 | value = __raw_readl(FRQCRB); | |
189 | value |= (1 << 31); | |
190 | __raw_writel(value, FRQCRB); | |
191 | } | |
192 | ||
193 | static int divisors[] = { 2, 3, 4, 6, 8, 12, 16, 18, | |
c070c203 | 194 | 24, 0, 36, 48, 7 }; |
f6d84f4a MD |
195 | |
196 | static struct clk_div_mult_table div4_div_mult_table = { | |
197 | .divisors = divisors, | |
198 | .nr_divisors = ARRAY_SIZE(divisors), | |
199 | }; | |
200 | ||
201 | static struct clk_div4_table div4_table = { | |
202 | .div_mult_table = &div4_div_mult_table, | |
203 | .kick = div4_kick, | |
204 | }; | |
205 | ||
206 | enum { DIV4_I, DIV4_ZG, DIV4_M3, DIV4_B, DIV4_M1, DIV4_M2, | |
207 | DIV4_Z, DIV4_ZTR, DIV4_ZT, DIV4_ZX, DIV4_HP, DIV4_NR }; | |
208 | ||
209 | #define DIV4(_reg, _bit, _mask, _flags) \ | |
210 | SH_CLK_DIV4(&pll1_clk, _reg, _bit, _mask, _flags) | |
211 | ||
212 | static struct clk div4_clks[DIV4_NR] = { | |
213 | [DIV4_I] = DIV4(FRQCRA, 20, 0xfff, CLK_ENABLE_ON_INIT), | |
214 | [DIV4_ZG] = DIV4(FRQCRA, 16, 0xbff, CLK_ENABLE_ON_INIT), | |
dcdb318f | 215 | [DIV4_M3] = DIV4(FRQCRA, 12, 0xfff, CLK_ENABLE_ON_INIT), |
f6d84f4a MD |
216 | [DIV4_B] = DIV4(FRQCRA, 8, 0xfff, CLK_ENABLE_ON_INIT), |
217 | [DIV4_M1] = DIV4(FRQCRA, 4, 0xfff, 0), | |
218 | [DIV4_M2] = DIV4(FRQCRA, 0, 0xfff, 0), | |
219 | [DIV4_Z] = DIV4(FRQCRB, 24, 0xbff, 0), | |
220 | [DIV4_ZTR] = DIV4(FRQCRB, 20, 0xfff, 0), | |
221 | [DIV4_ZT] = DIV4(FRQCRB, 16, 0xfff, 0), | |
222 | [DIV4_ZX] = DIV4(FRQCRB, 12, 0xfff, 0), | |
223 | [DIV4_HP] = DIV4(FRQCRB, 4, 0xfff, 0), | |
224 | }; | |
225 | ||
226 | enum { DIV6_VCK1, DIV6_VCK2, DIV6_VCK3, DIV6_ZB1, | |
227 | DIV6_FLCTL, DIV6_SDHI0, DIV6_SDHI1, DIV6_SDHI2, | |
228 | DIV6_FSIA, DIV6_FSIB, DIV6_SUB, | |
229 | DIV6_SPUA, DIV6_SPUV, DIV6_MSU, | |
230 | DIV6_HSI, DIV6_MFG1, DIV6_MFG2, | |
231 | DIV6_DSIT, DIV6_DSI0P, DIV6_DSI1P, | |
232 | DIV6_NR }; | |
233 | ||
234 | static struct clk div6_clks[DIV6_NR] = { | |
235 | [DIV6_VCK1] = SH_CLK_DIV6(&pll1_div2_clk, VCLKCR1, 0), | |
236 | [DIV6_VCK2] = SH_CLK_DIV6(&pll1_div2_clk, VCLKCR2, 0), | |
237 | [DIV6_VCK3] = SH_CLK_DIV6(&pll1_div2_clk, VCLKCR3, 0), | |
238 | [DIV6_ZB1] = SH_CLK_DIV6(&pll1_div2_clk, ZBCKCR, 0), | |
239 | [DIV6_FLCTL] = SH_CLK_DIV6(&pll1_div2_clk, FLCKCR, 0), | |
240 | [DIV6_SDHI0] = SH_CLK_DIV6(&pll1_div2_clk, SD0CKCR, 0), | |
241 | [DIV6_SDHI1] = SH_CLK_DIV6(&pll1_div2_clk, SD1CKCR, 0), | |
242 | [DIV6_SDHI2] = SH_CLK_DIV6(&pll1_div2_clk, SD2CKCR, 0), | |
243 | [DIV6_FSIA] = SH_CLK_DIV6(&pll1_div2_clk, FSIACKCR, 0), | |
244 | [DIV6_FSIB] = SH_CLK_DIV6(&pll1_div2_clk, FSIBCKCR, 0), | |
245 | [DIV6_SUB] = SH_CLK_DIV6(&sh73a0_extal2_clk, SUBCKCR, 0), | |
246 | [DIV6_SPUA] = SH_CLK_DIV6(&pll1_div2_clk, SPUACKCR, 0), | |
247 | [DIV6_SPUV] = SH_CLK_DIV6(&pll1_div2_clk, SPUVCKCR, 0), | |
248 | [DIV6_MSU] = SH_CLK_DIV6(&pll1_div2_clk, MSUCKCR, 0), | |
249 | [DIV6_HSI] = SH_CLK_DIV6(&pll1_div2_clk, HSICKCR, 0), | |
250 | [DIV6_MFG1] = SH_CLK_DIV6(&pll1_div2_clk, MFCK1CR, 0), | |
251 | [DIV6_MFG2] = SH_CLK_DIV6(&pll1_div2_clk, MFCK2CR, 0), | |
252 | [DIV6_DSIT] = SH_CLK_DIV6(&pll1_div2_clk, DSITCKCR, 0), | |
253 | [DIV6_DSI0P] = SH_CLK_DIV6(&pll1_div2_clk, DSI0PCKCR, 0), | |
254 | [DIV6_DSI1P] = SH_CLK_DIV6(&pll1_div2_clk, DSI1PCKCR, 0), | |
6d9598e2 MD |
255 | }; |
256 | ||
f6d84f4a | 257 | enum { MSTP001, |
5010f3db | 258 | MSTP125, MSTP116, |
f6d84f4a MD |
259 | MSTP219, |
260 | MSTP207, MSTP206, MSTP204, MSTP203, MSTP202, MSTP201, MSTP200, | |
a33bb8a2 | 261 | MSTP331, MSTP329, MSTP325, MSTP323, MSTP312, |
696d6e17 | 262 | MSTP411, MSTP410, MSTP403, |
6d9598e2 MD |
263 | MSTP_NR }; |
264 | ||
265 | #define MSTP(_parent, _reg, _bit, _flags) \ | |
266 | SH_CLK_MSTP32(_parent, _reg, _bit, _flags) | |
267 | ||
268 | static struct clk mstp_clks[MSTP_NR] = { | |
f6d84f4a | 269 | [MSTP001] = MSTP(&div4_clks[DIV4_HP], SMSTPCR0, 1, 0), /* IIC2 */ |
5010f3db | 270 | [MSTP125] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR1, 25, 0), /* TMU0 */ |
f6d84f4a MD |
271 | [MSTP116] = MSTP(&div4_clks[DIV4_HP], SMSTPCR1, 16, 0), /* IIC0 */ |
272 | [MSTP219] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 19, 0), /* SCIFA7 */ | |
273 | [MSTP207] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 7, 0), /* SCIFA5 */ | |
274 | [MSTP206] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 6, 0), /* SCIFB */ | |
275 | [MSTP204] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 4, 0), /* SCIFA0 */ | |
276 | [MSTP203] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 3, 0), /* SCIFA1 */ | |
277 | [MSTP202] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 2, 0), /* SCIFA2 */ | |
278 | [MSTP201] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 1, 0), /* SCIFA3 */ | |
279 | [MSTP200] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 0, 0), /* SCIFA4 */ | |
280 | [MSTP331] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR3, 31, 0), /* SCIFA6 */ | |
6d9598e2 | 281 | [MSTP329] = MSTP(&r_clk, SMSTPCR3, 29, 0), /* CMT10 */ |
5a1b70a4 | 282 | [MSTP325] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR3, 25, 0), /* IrDA */ |
f6d84f4a | 283 | [MSTP323] = MSTP(&div4_clks[DIV4_HP], SMSTPCR3, 23, 0), /* IIC1 */ |
6bf45a10 | 284 | [MSTP312] = MSTP(&div4_clks[DIV4_HP], SMSTPCR3, 12, 0), /* MMCIF0 */ |
f6d84f4a MD |
285 | [MSTP411] = MSTP(&div4_clks[DIV4_HP], SMSTPCR4, 11, 0), /* IIC3 */ |
286 | [MSTP410] = MSTP(&div4_clks[DIV4_HP], SMSTPCR4, 10, 0), /* IIC4 */ | |
019c4ae3 | 287 | [MSTP403] = MSTP(&r_clk, SMSTPCR4, 3, 0), /* KEYSC */ |
6d9598e2 MD |
288 | }; |
289 | ||
f6d84f4a | 290 | #define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk } |
6d9598e2 MD |
291 | #define CLKDEV_DEV_ID(_id, _clk) { .dev_id = _id, .clk = _clk } |
292 | ||
293 | static struct clk_lookup lookups[] = { | |
f6d84f4a MD |
294 | /* main clocks */ |
295 | CLKDEV_CON_ID("r_clk", &r_clk), | |
296 | ||
6d9598e2 | 297 | /* MSTP32 clocks */ |
696d6e17 | 298 | CLKDEV_DEV_ID("i2c-sh_mobile.2", &mstp_clks[MSTP001]), /* I2C2 */ |
5010f3db MD |
299 | CLKDEV_DEV_ID("sh_tmu.0", &mstp_clks[MSTP125]), /* TMU00 */ |
300 | CLKDEV_DEV_ID("sh_tmu.1", &mstp_clks[MSTP125]), /* TMU01 */ | |
696d6e17 | 301 | CLKDEV_DEV_ID("i2c-sh_mobile.0", &mstp_clks[MSTP116]), /* I2C0 */ |
6d9598e2 MD |
302 | CLKDEV_DEV_ID("sh-sci.7", &mstp_clks[MSTP219]), /* SCIFA7 */ |
303 | CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP207]), /* SCIFA5 */ | |
304 | CLKDEV_DEV_ID("sh-sci.8", &mstp_clks[MSTP206]), /* SCIFB */ | |
305 | CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP204]), /* SCIFA0 */ | |
306 | CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP203]), /* SCIFA1 */ | |
307 | CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP202]), /* SCIFA2 */ | |
308 | CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP201]), /* SCIFA3 */ | |
309 | CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP200]), /* SCIFA4 */ | |
310 | CLKDEV_DEV_ID("sh-sci.6", &mstp_clks[MSTP331]), /* SCIFA6 */ | |
311 | CLKDEV_DEV_ID("sh_cmt.10", &mstp_clks[MSTP329]), /* CMT10 */ | |
a33bb8a2 | 312 | CLKDEV_DEV_ID("sh_irda.0", &mstp_clks[MSTP325]), /* IrDA */ |
b028f94b | 313 | CLKDEV_DEV_ID("i2c-sh_mobile.1", &mstp_clks[MSTP323]), /* I2C1 */ |
6bf45a10 | 314 | CLKDEV_DEV_ID("sh_mmcif.0", &mstp_clks[MSTP312]), /* MMCIF0 */ |
b028f94b YT |
315 | CLKDEV_DEV_ID("i2c-sh_mobile.3", &mstp_clks[MSTP411]), /* I2C3 */ |
316 | CLKDEV_DEV_ID("i2c-sh_mobile.4", &mstp_clks[MSTP410]), /* I2C4 */ | |
019c4ae3 | 317 | CLKDEV_DEV_ID("sh_keysc.0", &mstp_clks[MSTP403]), /* KEYSC */ |
6d9598e2 MD |
318 | }; |
319 | ||
320 | void __init sh73a0_clock_init(void) | |
321 | { | |
322 | int k, ret = 0; | |
323 | ||
f6d84f4a MD |
324 | /* detect main clock parent */ |
325 | switch ((__raw_readl(CKSCR) >> 24) & 0x03) { | |
326 | case 0: | |
327 | main_clk.parent = &sh73a0_extal1_clk; | |
328 | break; | |
329 | case 1: | |
330 | main_clk.parent = &extal1_div2_clk; | |
331 | break; | |
332 | case 2: | |
333 | main_clk.parent = &sh73a0_extal2_clk; | |
334 | break; | |
335 | case 3: | |
336 | main_clk.parent = &extal2_div2_clk; | |
337 | break; | |
338 | } | |
339 | ||
6d9598e2 MD |
340 | for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++) |
341 | ret = clk_register(main_clks[k]); | |
342 | ||
f6d84f4a MD |
343 | if (!ret) |
344 | ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table); | |
345 | ||
346 | if (!ret) | |
347 | ret = sh_clk_div6_register(div6_clks, DIV6_NR); | |
348 | ||
6d9598e2 MD |
349 | if (!ret) |
350 | ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR); | |
351 | ||
352 | clkdev_add_table(lookups, ARRAY_SIZE(lookups)); | |
353 | ||
354 | if (!ret) | |
355 | clk_init(); | |
356 | else | |
357 | panic("failed to setup sh73a0 clocks\n"); | |
358 | } |