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 <asm/clock.h>
25 #include <asm/hwblk.h>
26 #include <cpu/sh7724.h>
28 /* SH7724 registers */
29 #define FRQCRA 0xa4150000
30 #define FRQCRB 0xa4150004
31 #define VCLKCR 0xa4150048
32 #define FCLKACR 0xa4150008
33 #define FCLKBCR 0xa415000c
34 #define IRDACLKCR 0xa4150018
35 #define PLLCR 0xa4150024
36 #define SPUCLKCR 0xa415003c
37 #define FLLFRQ 0xa4150050
38 #define LSTATS 0xa4150060
40 /* Fixed 32 KHz root clock for RTC and Power Management purposes */
41 static struct clk r_clk
= {
48 * Default rate for the root input clock, reset this with clk_set_rate()
49 * from the platform code.
51 struct clk extal_clk
= {
57 /* The fll multiplies the 32khz r_clk, may be used instead of extal */
58 static unsigned long fll_recalc(struct clk
*clk
)
60 unsigned long mult
= 0;
61 unsigned long div
= 1;
63 if (__raw_readl(PLLCR
) & 0x1000)
64 mult
= __raw_readl(FLLFRQ
) & 0x3ff;
66 if (__raw_readl(FLLFRQ
) & 0x4000)
69 return (clk
->parent
->rate
* mult
) / div
;
72 static struct clk_ops fll_clk_ops
= {
76 static struct clk fll_clk
= {
81 .flags
= CLK_ENABLE_ON_INIT
,
84 static unsigned long pll_recalc(struct clk
*clk
)
86 unsigned long mult
= 1;
88 if (__raw_readl(PLLCR
) & 0x4000)
89 mult
= (((__raw_readl(FRQCRA
) >> 24) & 0x3f) + 1) * 2;
91 return clk
->parent
->rate
* mult
;
94 static struct clk_ops pll_clk_ops
= {
98 static struct clk pll_clk
= {
102 .flags
= CLK_ENABLE_ON_INIT
,
105 /* A fixed divide-by-3 block use by the div6 clocks */
106 static unsigned long div3_recalc(struct clk
*clk
)
108 return clk
->parent
->rate
/ 3;
111 static struct clk_ops div3_clk_ops
= {
112 .recalc
= div3_recalc
,
115 static struct clk div3_clk
= {
118 .ops
= &div3_clk_ops
,
122 struct clk
*main_clks
[] = {
130 static int divisors
[] = { 2, 3, 4, 6, 8, 12, 16, 0, 24, 32, 36, 48, 0, 72 };
132 static struct clk_div_mult_table div4_table
= {
133 .divisors
= divisors
,
134 .nr_divisors
= ARRAY_SIZE(divisors
),
137 enum { DIV4_I
, DIV4_SH
, DIV4_B
, DIV4_P
, DIV4_M1
, DIV4_NR
};
139 #define DIV4(_str, _reg, _bit, _mask, _flags) \
140 SH_CLK_DIV4(_str, &pll_clk, _reg, _bit, _mask, _flags)
142 struct clk div4_clks
[DIV4_NR
] = {
143 [DIV4_I
] = DIV4("cpu_clk", FRQCRA
, 20, 0x2f7d, CLK_ENABLE_ON_INIT
),
144 [DIV4_SH
] = DIV4("shyway_clk", FRQCRA
, 12, 0x2f7c, CLK_ENABLE_ON_INIT
),
145 [DIV4_B
] = DIV4("bus_clk", FRQCRA
, 8, 0x2f7c, CLK_ENABLE_ON_INIT
),
146 [DIV4_P
] = DIV4("peripheral_clk", FRQCRA
, 0, 0x2f7c, 0),
147 [DIV4_M1
] = DIV4("vpu_clk", FRQCRB
, 4, 0x2f7c, 0),
150 struct clk div6_clks
[] = {
151 SH_CLK_DIV6("video_clk", &div3_clk
, VCLKCR
, 0),
152 SH_CLK_DIV6("fsia_clk", &div3_clk
, FCLKACR
, 0),
153 SH_CLK_DIV6("fsib_clk", &div3_clk
, FCLKBCR
, 0),
154 SH_CLK_DIV6("irda_clk", &div3_clk
, IRDACLKCR
, 0),
155 SH_CLK_DIV6("spu_clk", &div3_clk
, SPUCLKCR
, 0),
158 #define R_CLK (&r_clk)
159 #define P_CLK (&div4_clks[DIV4_P])
160 #define B_CLK (&div4_clks[DIV4_B])
161 #define I_CLK (&div4_clks[DIV4_I])
162 #define SH_CLK (&div4_clks[DIV4_SH])
164 static struct clk mstp_clks
[] = {
165 SH_HWBLK_CLK("tlb0", -1, I_CLK
, HWBLK_TLB
, CLK_ENABLE_ON_INIT
),
166 SH_HWBLK_CLK("ic0", -1, I_CLK
, HWBLK_IC
, CLK_ENABLE_ON_INIT
),
167 SH_HWBLK_CLK("oc0", -1, I_CLK
, HWBLK_OC
, CLK_ENABLE_ON_INIT
),
168 SH_HWBLK_CLK("rs0", -1, B_CLK
, HWBLK_RSMEM
, CLK_ENABLE_ON_INIT
),
169 SH_HWBLK_CLK("ilmem0", -1, I_CLK
, HWBLK_ILMEM
, CLK_ENABLE_ON_INIT
),
170 SH_HWBLK_CLK("l2c0", -1, SH_CLK
, HWBLK_L2C
, CLK_ENABLE_ON_INIT
),
171 SH_HWBLK_CLK("fpu0", -1, I_CLK
, HWBLK_FPU
, CLK_ENABLE_ON_INIT
),
172 SH_HWBLK_CLK("intc0", -1, P_CLK
, HWBLK_INTC
, CLK_ENABLE_ON_INIT
),
173 SH_HWBLK_CLK("dmac0", -1, B_CLK
, HWBLK_DMAC0
, 0),
174 SH_HWBLK_CLK("sh0", -1, SH_CLK
, HWBLK_SHYWAY
, CLK_ENABLE_ON_INIT
),
175 SH_HWBLK_CLK("hudi0", -1, P_CLK
, HWBLK_HUDI
, 0),
176 SH_HWBLK_CLK("ubc0", -1, I_CLK
, HWBLK_UBC
, 0),
177 SH_HWBLK_CLK("tmu0", -1, P_CLK
, HWBLK_TMU0
, 0),
178 SH_HWBLK_CLK("cmt0", -1, R_CLK
, HWBLK_CMT
, 0),
179 SH_HWBLK_CLK("rwdt0", -1, R_CLK
, HWBLK_RWDT
, 0),
180 SH_HWBLK_CLK("dmac1", -1, B_CLK
, HWBLK_DMAC1
, 0),
181 SH_HWBLK_CLK("tmu1", -1, P_CLK
, HWBLK_TMU1
, 0),
182 SH_HWBLK_CLK("scif0", -1, P_CLK
, HWBLK_SCIF0
, 0),
183 SH_HWBLK_CLK("scif1", -1, P_CLK
, HWBLK_SCIF1
, 0),
184 SH_HWBLK_CLK("scif2", -1, P_CLK
, HWBLK_SCIF2
, 0),
185 SH_HWBLK_CLK("scif3", -1, B_CLK
, HWBLK_SCIF3
, 0),
186 SH_HWBLK_CLK("scif4", -1, B_CLK
, HWBLK_SCIF4
, 0),
187 SH_HWBLK_CLK("scif5", -1, B_CLK
, HWBLK_SCIF5
, 0),
188 SH_HWBLK_CLK("msiof0", -1, B_CLK
, HWBLK_MSIOF0
, 0),
189 SH_HWBLK_CLK("msiof1", -1, B_CLK
, HWBLK_MSIOF1
, 0),
191 SH_HWBLK_CLK("keysc0", -1, R_CLK
, HWBLK_KEYSC
, 0),
192 SH_HWBLK_CLK("rtc0", -1, R_CLK
, HWBLK_RTC
, 0),
193 SH_HWBLK_CLK("i2c0", -1, P_CLK
, HWBLK_IIC0
, 0),
194 SH_HWBLK_CLK("i2c1", -1, P_CLK
, HWBLK_IIC1
, 0),
196 SH_HWBLK_CLK("mmc0", -1, B_CLK
, HWBLK_MMC
, 0),
197 SH_HWBLK_CLK("eth0", -1, B_CLK
, HWBLK_ETHER
, 0),
198 SH_HWBLK_CLK("atapi0", -1, B_CLK
, HWBLK_ATAPI
, 0),
199 SH_HWBLK_CLK("tpu0", -1, B_CLK
, HWBLK_TPU
, 0),
200 SH_HWBLK_CLK("irda0", -1, P_CLK
, HWBLK_IRDA
, 0),
201 SH_HWBLK_CLK("tsif0", -1, B_CLK
, HWBLK_TSIF
, 0),
202 SH_HWBLK_CLK("usb1", -1, B_CLK
, HWBLK_USB1
, 0),
203 SH_HWBLK_CLK("usb0", -1, B_CLK
, HWBLK_USB0
, 0),
204 SH_HWBLK_CLK("2dg0", -1, B_CLK
, HWBLK_2DG
, 0),
205 SH_HWBLK_CLK("sdhi0", -1, B_CLK
, HWBLK_SDHI0
, 0),
206 SH_HWBLK_CLK("sdhi1", -1, B_CLK
, HWBLK_SDHI1
, 0),
207 SH_HWBLK_CLK("veu1", -1, B_CLK
, HWBLK_VEU1
, 0),
208 SH_HWBLK_CLK("ceu1", -1, B_CLK
, HWBLK_CEU1
, 0),
209 SH_HWBLK_CLK("beu1", -1, B_CLK
, HWBLK_BEU1
, 0),
210 SH_HWBLK_CLK("2ddmac0", -1, SH_CLK
, HWBLK_2DDMAC
, 0),
211 SH_HWBLK_CLK("spu0", -1, B_CLK
, HWBLK_SPU
, 0),
212 SH_HWBLK_CLK("jpu0", -1, B_CLK
, HWBLK_JPU
, 0),
213 SH_HWBLK_CLK("vou0", -1, B_CLK
, HWBLK_VOU
, 0),
214 SH_HWBLK_CLK("beu0", -1, B_CLK
, HWBLK_BEU0
, 0),
215 SH_HWBLK_CLK("ceu0", -1, B_CLK
, HWBLK_CEU0
, 0),
216 SH_HWBLK_CLK("veu0", -1, B_CLK
, HWBLK_VEU0
, 0),
217 SH_HWBLK_CLK("vpu0", -1, B_CLK
, HWBLK_VPU
, 0),
218 SH_HWBLK_CLK("lcdc0", -1, B_CLK
, HWBLK_LCDC
, 0),
221 int __init
arch_clk_init(void)
225 /* autodetect extal or fll configuration */
226 if (__raw_readl(PLLCR
) & 0x1000)
227 pll_clk
.parent
= &fll_clk
;
229 pll_clk
.parent
= &extal_clk
;
231 for (k
= 0; !ret
&& (k
< ARRAY_SIZE(main_clks
)); k
++)
232 ret
= clk_register(main_clks
[k
]);
235 ret
= sh_clk_div4_register(div4_clks
, DIV4_NR
, &div4_table
);
238 ret
= sh_clk_div6_register(div6_clks
, ARRAY_SIZE(div6_clks
));
241 ret
= sh_hwblk_clk_register(mstp_clks
, ARRAY_SIZE(mstp_clks
));