2 * arch/sh/kernel/cpu/sh4a/clock-sh7724.c
4 * SH7724 clock framework support
6 * Copyright (C) 2009 Magnus Damm
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
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.
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
21 #include <linux/init.h>
22 #include <linux/kernel.h>
24 #include <linux/clk.h>
25 #include <asm/clkdev.h>
26 #include <asm/clock.h>
27 #include <asm/hwblk.h>
28 #include <cpu/sh7724.h>
30 /* SH7724 registers */
31 #define FRQCRA 0xa4150000
32 #define FRQCRB 0xa4150004
33 #define VCLKCR 0xa4150048
34 #define FCLKACR 0xa4150008
35 #define FCLKBCR 0xa415000c
36 #define IRDACLKCR 0xa4150018
37 #define PLLCR 0xa4150024
38 #define SPUCLKCR 0xa415003c
39 #define FLLFRQ 0xa4150050
40 #define LSTATS 0xa4150060
42 /* Fixed 32 KHz root clock for RTC and Power Management purposes */
43 static struct clk r_clk
= {
50 * Default rate for the root input clock, reset this with clk_set_rate()
51 * from the platform code.
53 struct clk extal_clk
= {
59 /* The fll multiplies the 32khz r_clk, may be used instead of extal */
60 static unsigned long fll_recalc(struct clk
*clk
)
62 unsigned long mult
= 0;
63 unsigned long div
= 1;
65 if (__raw_readl(PLLCR
) & 0x1000)
66 mult
= __raw_readl(FLLFRQ
) & 0x3ff;
68 if (__raw_readl(FLLFRQ
) & 0x4000)
71 return (clk
->parent
->rate
* mult
) / div
;
74 static struct clk_ops fll_clk_ops
= {
78 static struct clk fll_clk
= {
83 .flags
= CLK_ENABLE_ON_INIT
,
86 static unsigned long pll_recalc(struct clk
*clk
)
88 unsigned long mult
= 1;
90 if (__raw_readl(PLLCR
) & 0x4000)
91 mult
= (((__raw_readl(FRQCRA
) >> 24) & 0x3f) + 1) * 2;
93 return clk
->parent
->rate
* mult
;
96 static struct clk_ops pll_clk_ops
= {
100 static struct clk pll_clk
= {
104 .flags
= CLK_ENABLE_ON_INIT
,
107 /* A fixed divide-by-3 block use by the div6 clocks */
108 static unsigned long div3_recalc(struct clk
*clk
)
110 return clk
->parent
->rate
/ 3;
113 static struct clk_ops div3_clk_ops
= {
114 .recalc
= div3_recalc
,
117 static struct clk div3_clk
= {
120 .ops
= &div3_clk_ops
,
124 struct clk
*main_clks
[] = {
132 static void div4_kick(struct clk
*clk
)
136 /* set KICK bit in FRQCRA to update hardware setting */
137 value
= __raw_readl(FRQCRA
);
139 __raw_writel(value
, FRQCRA
);
142 static int divisors
[] = { 2, 3, 4, 6, 8, 12, 16, 0, 24, 32, 36, 48, 0, 72 };
144 static struct clk_div_mult_table div4_div_mult_table
= {
145 .divisors
= divisors
,
146 .nr_divisors
= ARRAY_SIZE(divisors
),
149 static struct clk_div4_table div4_table
= {
150 .div_mult_table
= &div4_div_mult_table
,
154 enum { DIV4_I
, DIV4_SH
, DIV4_B
, DIV4_P
, DIV4_M1
, DIV4_NR
};
156 #define DIV4(_str, _reg, _bit, _mask, _flags) \
157 SH_CLK_DIV4(_str, &pll_clk, _reg, _bit, _mask, _flags)
159 struct clk div4_clks
[DIV4_NR
] = {
160 [DIV4_I
] = DIV4("cpu_clk", FRQCRA
, 20, 0x2f7d, CLK_ENABLE_ON_INIT
),
161 [DIV4_SH
] = DIV4("shyway_clk", FRQCRA
, 12, 0x2f7c, CLK_ENABLE_ON_INIT
),
162 [DIV4_B
] = DIV4("bus_clk", FRQCRA
, 8, 0x2f7c, CLK_ENABLE_ON_INIT
),
163 [DIV4_P
] = DIV4("peripheral_clk", FRQCRA
, 0, 0x2f7c, 0),
164 [DIV4_M1
] = DIV4("vpu_clk", FRQCRB
, 4, 0x2f7c, CLK_ENABLE_ON_INIT
),
167 enum { DIV6_V
, DIV6_FA
, DIV6_FB
, DIV6_I
, DIV6_S
, DIV6_NR
};
169 struct clk div6_clks
[DIV6_NR
] = {
170 [DIV6_V
] = SH_CLK_DIV6(&div3_clk
, VCLKCR
, 0),
171 [DIV6_FA
] = SH_CLK_DIV6(&div3_clk
, FCLKACR
, 0),
172 [DIV6_FB
] = SH_CLK_DIV6(&div3_clk
, FCLKBCR
, 0),
173 [DIV6_I
] = SH_CLK_DIV6(&div3_clk
, IRDACLKCR
, 0),
174 [DIV6_S
] = SH_CLK_DIV6(&div3_clk
, SPUCLKCR
, CLK_ENABLE_ON_INIT
),
177 static struct clk mstp_clks
[HWBLK_NR
] = {
178 SH_HWBLK_CLK(HWBLK_TLB
, &div4_clks
[DIV4_I
], CLK_ENABLE_ON_INIT
),
179 SH_HWBLK_CLK(HWBLK_IC
, &div4_clks
[DIV4_I
], CLK_ENABLE_ON_INIT
),
180 SH_HWBLK_CLK(HWBLK_OC
, &div4_clks
[DIV4_I
], CLK_ENABLE_ON_INIT
),
181 SH_HWBLK_CLK(HWBLK_RSMEM
, &div4_clks
[DIV4_B
], CLK_ENABLE_ON_INIT
),
182 SH_HWBLK_CLK(HWBLK_ILMEM
, &div4_clks
[DIV4_I
], CLK_ENABLE_ON_INIT
),
183 SH_HWBLK_CLK(HWBLK_L2C
, &div4_clks
[DIV4_SH
], CLK_ENABLE_ON_INIT
),
184 SH_HWBLK_CLK(HWBLK_FPU
, &div4_clks
[DIV4_I
], CLK_ENABLE_ON_INIT
),
185 SH_HWBLK_CLK(HWBLK_INTC
, &div4_clks
[DIV4_P
], CLK_ENABLE_ON_INIT
),
186 SH_HWBLK_CLK(HWBLK_DMAC0
, &div4_clks
[DIV4_B
], 0),
187 SH_HWBLK_CLK(HWBLK_SHYWAY
, &div4_clks
[DIV4_SH
], CLK_ENABLE_ON_INIT
),
188 SH_HWBLK_CLK(HWBLK_HUDI
, &div4_clks
[DIV4_P
], 0),
189 SH_HWBLK_CLK(HWBLK_UBC
, &div4_clks
[DIV4_I
], 0),
190 SH_HWBLK_CLK(HWBLK_TMU0
, &div4_clks
[DIV4_P
], 0),
191 SH_HWBLK_CLK(HWBLK_CMT
, &r_clk
, 0),
192 SH_HWBLK_CLK(HWBLK_RWDT
, &r_clk
, 0),
193 SH_HWBLK_CLK(HWBLK_DMAC1
, &div4_clks
[DIV4_B
], 0),
194 SH_HWBLK_CLK(HWBLK_TMU1
, &div4_clks
[DIV4_P
], 0),
195 SH_HWBLK_CLK(HWBLK_SCIF0
, &div4_clks
[DIV4_P
], 0),
196 SH_HWBLK_CLK(HWBLK_SCIF1
, &div4_clks
[DIV4_P
], 0),
197 SH_HWBLK_CLK(HWBLK_SCIF2
, &div4_clks
[DIV4_P
], 0),
198 SH_HWBLK_CLK(HWBLK_SCIF3
, &div4_clks
[DIV4_B
], 0),
199 SH_HWBLK_CLK(HWBLK_SCIF4
, &div4_clks
[DIV4_B
], 0),
200 SH_HWBLK_CLK(HWBLK_SCIF5
, &div4_clks
[DIV4_B
], 0),
201 SH_HWBLK_CLK(HWBLK_MSIOF0
, &div4_clks
[DIV4_B
], 0),
202 SH_HWBLK_CLK(HWBLK_MSIOF1
, &div4_clks
[DIV4_B
], 0),
204 SH_HWBLK_CLK(HWBLK_KEYSC
, &r_clk
, 0),
205 SH_HWBLK_CLK(HWBLK_RTC
, &r_clk
, 0),
206 SH_HWBLK_CLK(HWBLK_IIC0
, &div4_clks
[DIV4_P
], 0),
207 SH_HWBLK_CLK(HWBLK_IIC1
, &div4_clks
[DIV4_P
], 0),
209 SH_HWBLK_CLK(HWBLK_MMC
, &div4_clks
[DIV4_B
], 0),
210 SH_HWBLK_CLK(HWBLK_ETHER
, &div4_clks
[DIV4_B
], 0),
211 SH_HWBLK_CLK(HWBLK_ATAPI
, &div4_clks
[DIV4_B
], 0),
212 SH_HWBLK_CLK(HWBLK_TPU
, &div4_clks
[DIV4_B
], 0),
213 SH_HWBLK_CLK(HWBLK_IRDA
, &div4_clks
[DIV4_P
], 0),
214 SH_HWBLK_CLK(HWBLK_TSIF
, &div4_clks
[DIV4_B
], 0),
215 SH_HWBLK_CLK(HWBLK_USB1
, &div4_clks
[DIV4_B
], 0),
216 SH_HWBLK_CLK(HWBLK_USB0
, &div4_clks
[DIV4_B
], 0),
217 SH_HWBLK_CLK(HWBLK_2DG
, &div4_clks
[DIV4_B
], 0),
218 SH_HWBLK_CLK(HWBLK_SDHI0
, &div4_clks
[DIV4_B
], 0),
219 SH_HWBLK_CLK(HWBLK_SDHI1
, &div4_clks
[DIV4_B
], 0),
220 SH_HWBLK_CLK(HWBLK_VEU1
, &div4_clks
[DIV4_B
], 0),
221 SH_HWBLK_CLK(HWBLK_CEU1
, &div4_clks
[DIV4_B
], 0),
222 SH_HWBLK_CLK(HWBLK_BEU1
, &div4_clks
[DIV4_B
], 0),
223 SH_HWBLK_CLK(HWBLK_2DDMAC
, &div4_clks
[DIV4_SH
], 0),
224 SH_HWBLK_CLK(HWBLK_SPU
, &div4_clks
[DIV4_B
], 0),
225 SH_HWBLK_CLK(HWBLK_JPU
, &div4_clks
[DIV4_B
], 0),
226 SH_HWBLK_CLK(HWBLK_VOU
, &div4_clks
[DIV4_B
], 0),
227 SH_HWBLK_CLK(HWBLK_BEU0
, &div4_clks
[DIV4_B
], 0),
228 SH_HWBLK_CLK(HWBLK_CEU0
, &div4_clks
[DIV4_B
], 0),
229 SH_HWBLK_CLK(HWBLK_VEU0
, &div4_clks
[DIV4_B
], 0),
230 SH_HWBLK_CLK(HWBLK_VPU
, &div4_clks
[DIV4_B
], 0),
231 SH_HWBLK_CLK(HWBLK_LCDC
, &div4_clks
[DIV4_B
], 0),
234 #define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk }
236 static struct clk_lookup lookups
[] = {
238 CLKDEV_CON_ID("video_clk", &div6_clks
[DIV6_V
]),
239 CLKDEV_CON_ID("fsia_clk", &div6_clks
[DIV6_FA
]),
240 CLKDEV_CON_ID("fsib_clk", &div6_clks
[DIV6_FB
]),
241 CLKDEV_CON_ID("irda_clk", &div6_clks
[DIV6_I
]),
242 CLKDEV_CON_ID("spu_clk", &div6_clks
[DIV6_S
]),
245 CLKDEV_CON_ID("tlb0", &mstp_clks
[HWBLK_TLB
]),
246 CLKDEV_CON_ID("ic0", &mstp_clks
[HWBLK_IC
]),
247 CLKDEV_CON_ID("oc0", &mstp_clks
[HWBLK_OC
]),
248 CLKDEV_CON_ID("rs0", &mstp_clks
[HWBLK_RSMEM
]),
249 CLKDEV_CON_ID("ilmem0", &mstp_clks
[HWBLK_ILMEM
]),
250 CLKDEV_CON_ID("l2c0", &mstp_clks
[HWBLK_L2C
]),
251 CLKDEV_CON_ID("fpu0", &mstp_clks
[HWBLK_FPU
]),
252 CLKDEV_CON_ID("intc0", &mstp_clks
[HWBLK_INTC
]),
253 CLKDEV_CON_ID("dmac0", &mstp_clks
[HWBLK_DMAC0
]),
254 CLKDEV_CON_ID("sh0", &mstp_clks
[HWBLK_SHYWAY
]),
255 CLKDEV_CON_ID("hudi0", &mstp_clks
[HWBLK_HUDI
]),
256 CLKDEV_CON_ID("ubc0", &mstp_clks
[HWBLK_UBC
]),
259 .dev_id
= "sh_tmu.0",
261 .clk
= &mstp_clks
[HWBLK_TMU0
],
264 .dev_id
= "sh_tmu.1",
266 .clk
= &mstp_clks
[HWBLK_TMU0
],
269 .dev_id
= "sh_tmu.2",
271 .clk
= &mstp_clks
[HWBLK_TMU0
],
274 .dev_id
= "sh_tmu.3",
276 .clk
= &mstp_clks
[HWBLK_TMU1
],
278 CLKDEV_CON_ID("cmt_fck", &mstp_clks
[HWBLK_CMT
]),
279 CLKDEV_CON_ID("rwdt0", &mstp_clks
[HWBLK_RWDT
]),
280 CLKDEV_CON_ID("dmac1", &mstp_clks
[HWBLK_DMAC1
]),
283 .dev_id
= "sh_tmu.4",
285 .clk
= &mstp_clks
[HWBLK_TMU1
],
288 .dev_id
= "sh_tmu.5",
290 .clk
= &mstp_clks
[HWBLK_TMU1
],
293 .dev_id
= "sh-sci.0",
295 .clk
= &mstp_clks
[HWBLK_SCIF0
],
298 .dev_id
= "sh-sci.1",
300 .clk
= &mstp_clks
[HWBLK_SCIF1
],
303 .dev_id
= "sh-sci.2",
305 .clk
= &mstp_clks
[HWBLK_SCIF2
],
308 .dev_id
= "sh-sci.3",
310 .clk
= &mstp_clks
[HWBLK_SCIF3
],
313 .dev_id
= "sh-sci.4",
315 .clk
= &mstp_clks
[HWBLK_SCIF4
],
318 .dev_id
= "sh-sci.5",
320 .clk
= &mstp_clks
[HWBLK_SCIF5
],
322 CLKDEV_CON_ID("msiof0", &mstp_clks
[HWBLK_MSIOF0
]),
323 CLKDEV_CON_ID("msiof1", &mstp_clks
[HWBLK_MSIOF1
]),
324 CLKDEV_CON_ID("keysc0", &mstp_clks
[HWBLK_KEYSC
]),
325 CLKDEV_CON_ID("rtc0", &mstp_clks
[HWBLK_RTC
]),
326 CLKDEV_CON_ID("i2c0", &mstp_clks
[HWBLK_IIC0
]),
327 CLKDEV_CON_ID("i2c1", &mstp_clks
[HWBLK_IIC1
]),
328 CLKDEV_CON_ID("mmc0", &mstp_clks
[HWBLK_MMC
]),
329 CLKDEV_CON_ID("eth0", &mstp_clks
[HWBLK_ETHER
]),
330 CLKDEV_CON_ID("atapi0", &mstp_clks
[HWBLK_ATAPI
]),
331 CLKDEV_CON_ID("tpu0", &mstp_clks
[HWBLK_TPU
]),
332 CLKDEV_CON_ID("irda0", &mstp_clks
[HWBLK_IRDA
]),
333 CLKDEV_CON_ID("tsif0", &mstp_clks
[HWBLK_TSIF
]),
334 CLKDEV_CON_ID("usb1", &mstp_clks
[HWBLK_USB1
]),
335 CLKDEV_CON_ID("usb0", &mstp_clks
[HWBLK_USB0
]),
336 CLKDEV_CON_ID("2dg0", &mstp_clks
[HWBLK_2DG
]),
337 CLKDEV_CON_ID("sdhi0", &mstp_clks
[HWBLK_SDHI0
]),
338 CLKDEV_CON_ID("sdhi1", &mstp_clks
[HWBLK_SDHI1
]),
339 CLKDEV_CON_ID("veu1", &mstp_clks
[HWBLK_VEU1
]),
340 CLKDEV_CON_ID("ceu1", &mstp_clks
[HWBLK_CEU1
]),
341 CLKDEV_CON_ID("beu1", &mstp_clks
[HWBLK_BEU1
]),
342 CLKDEV_CON_ID("2ddmac0", &mstp_clks
[HWBLK_2DDMAC
]),
343 CLKDEV_CON_ID("spu0", &mstp_clks
[HWBLK_SPU
]),
344 CLKDEV_CON_ID("jpu0", &mstp_clks
[HWBLK_JPU
]),
345 CLKDEV_CON_ID("vou0", &mstp_clks
[HWBLK_VOU
]),
346 CLKDEV_CON_ID("beu0", &mstp_clks
[HWBLK_BEU0
]),
347 CLKDEV_CON_ID("ceu0", &mstp_clks
[HWBLK_CEU0
]),
348 CLKDEV_CON_ID("veu0", &mstp_clks
[HWBLK_VEU0
]),
349 CLKDEV_CON_ID("vpu0", &mstp_clks
[HWBLK_VPU
]),
350 CLKDEV_CON_ID("lcdc0", &mstp_clks
[HWBLK_LCDC
]),
353 int __init
arch_clk_init(void)
357 /* autodetect extal or fll configuration */
358 if (__raw_readl(PLLCR
) & 0x1000)
359 pll_clk
.parent
= &fll_clk
;
361 pll_clk
.parent
= &extal_clk
;
363 for (k
= 0; !ret
&& (k
< ARRAY_SIZE(main_clks
)); k
++)
364 ret
= clk_register(main_clks
[k
]);
366 clkdev_add_table(lookups
, ARRAY_SIZE(lookups
));
369 ret
= sh_clk_div4_register(div4_clks
, DIV4_NR
, &div4_table
);
372 ret
= sh_clk_div6_register(div6_clks
, DIV6_NR
);
375 ret
= sh_hwblk_clk_register(mstp_clks
, HWBLK_NR
);