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sh: get rid of div6 clock names
[net-next-2.6.git] / arch / sh / kernel / cpu / sh4a / clock-sh7722.c
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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 *
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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>
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26#include <asm/hwblk.h>
27#include <cpu/sh7722.h>
1929cb34 28
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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
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36#define DLLFRQ 0xa4150050
37
38/* Fixed 32 KHz root clock for RTC and Power Management purposes */
39static struct clk r_clk = {
40 .name = "rclk",
41 .id = -1,
42 .rate = 32768,
1929cb34 43};
44
1929cb34 45/*
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46 * Default rate for the root input clock, reset this with clk_set_rate()
47 * from the platform code.
1929cb34 48 */
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49struct clk extal_clk = {
50 .name = "extal",
51 .id = -1,
52 .rate = 33333333,
1929cb34 53};
54
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55/* The dll block multiplies the 32khz r_clk, may be used instead of extal */
56static unsigned long dll_recalc(struct clk *clk)
1929cb34 57{
46e9371c 58 unsigned long mult;
1929cb34 59
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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
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68static struct clk_ops dll_clk_ops = {
69 .recalc = dll_recalc,
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70};
71
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72static 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 80static unsigned long pll_recalc(struct clk *clk)
1929cb34 81{
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82 unsigned long mult = 1;
83 unsigned long div = 1;
1929cb34 84
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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
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93static struct clk_ops pll_clk_ops = {
94 .recalc = pll_recalc,
1929cb34 95};
96
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97static 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
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104struct clk *main_clks[] = {
105 &r_clk,
106 &extal_clk,
107 &dll_clk,
108 &pll_clk,
1929cb34 109};
110
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111static int multipliers[] = { 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
112static int divisors[] = { 1, 3, 2, 5, 3, 4, 5, 6, 8, 10, 12, 16, 20 };
1929cb34 113
0a5f337e 114static struct clk_div_mult_table div4_div_mult_table = {
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115 .divisors = divisors,
116 .nr_divisors = ARRAY_SIZE(divisors),
117 .multipliers = multipliers,
118 .nr_multipliers = ARRAY_SIZE(multipliers),
7c7e02a2 119};
1312994c 120
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121static struct clk_div4_table div4_table = {
122 .div_mult_table = &div4_div_mult_table,
123};
124
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125#define DIV4(_str, _reg, _bit, _mask, _flags) \
126 SH_CLK_DIV4(_str, &pll_clk, _reg, _bit, _mask, _flags)
1929cb34 127
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128enum { DIV4_I, DIV4_U, DIV4_SH, DIV4_B, DIV4_B3, DIV4_P, DIV4_NR };
129
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130struct 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),
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137};
138
139enum { DIV4_IRDA, DIV4_ENABLE_NR };
140
141struct clk div4_enable_clks[DIV4_ENABLE_NR] = {
142 [DIV4_IRDA] = DIV4("irda_clk", IRDACLKCR, 0, 0x1fff, 0),
143};
144
145enum { DIV4_SIUA, DIV4_SIUB, DIV4_REPARENT_NR };
146
147struct clk div4_reparent_clks[DIV4_REPARENT_NR] = {
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148 [DIV4_SIUA] = DIV4("siua_clk", SCLKACR, 0, 0x1fff, 0),
149 [DIV4_SIUB] = DIV4("siub_clk", SCLKBCR, 0, 0x1fff, 0),
1929cb34 150};
151
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152enum { DIV6_V, DIV6_NR };
153
154struct clk div6_clks[DIV6_NR] = {
9e1985e1 155 [DIV6_V] = SH_CLK_DIV6(&pll_clk, VCLKCR, 0),
1929cb34 156};
157
f3d51e13 158static struct clk mstp_clks[HWBLK_NR] = {
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159 SH_HWBLK_CLK(HWBLK_URAM, &div4_clks[DIV4_U], CLK_ENABLE_ON_INIT),
160 SH_HWBLK_CLK(HWBLK_XYMEM, &div4_clks[DIV4_B], CLK_ENABLE_ON_INIT),
161 SH_HWBLK_CLK(HWBLK_TMU, &div4_clks[DIV4_P], 0),
162 SH_HWBLK_CLK(HWBLK_CMT, &r_clk, 0),
163 SH_HWBLK_CLK(HWBLK_RWDT, &r_clk, 0),
164 SH_HWBLK_CLK(HWBLK_FLCTL, &div4_clks[DIV4_P], 0),
165 SH_HWBLK_CLK(HWBLK_SCIF0, &div4_clks[DIV4_P], 0),
166 SH_HWBLK_CLK(HWBLK_SCIF1, &div4_clks[DIV4_P], 0),
167 SH_HWBLK_CLK(HWBLK_SCIF2, &div4_clks[DIV4_P], 0),
168
169 SH_HWBLK_CLK(HWBLK_IIC, &div4_clks[DIV4_P], 0),
170 SH_HWBLK_CLK(HWBLK_RTC, &r_clk, 0),
171
172 SH_HWBLK_CLK(HWBLK_SDHI, &div4_clks[DIV4_P], 0),
173 SH_HWBLK_CLK(HWBLK_KEYSC, &r_clk, 0),
174 SH_HWBLK_CLK(HWBLK_USBF, &div4_clks[DIV4_P], 0),
175 SH_HWBLK_CLK(HWBLK_2DG, &div4_clks[DIV4_B], 0),
176 SH_HWBLK_CLK(HWBLK_SIU, &div4_clks[DIV4_B], 0),
177 SH_HWBLK_CLK(HWBLK_VOU, &div4_clks[DIV4_B], 0),
178 SH_HWBLK_CLK(HWBLK_JPU, &div4_clks[DIV4_B], 0),
179 SH_HWBLK_CLK(HWBLK_BEU, &div4_clks[DIV4_B], 0),
180 SH_HWBLK_CLK(HWBLK_CEU, &div4_clks[DIV4_B], 0),
181 SH_HWBLK_CLK(HWBLK_VEU, &div4_clks[DIV4_B], 0),
182 SH_HWBLK_CLK(HWBLK_VPU, &div4_clks[DIV4_B], 0),
183 SH_HWBLK_CLK(HWBLK_LCDC, &div4_clks[DIV4_P], 0),
1929cb34 184};
185
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186#define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk }
187
e4e06697 188static struct clk_lookup lookups[] = {
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189 /* DIV6 clocks */
190 CLKDEV_CON_ID("video_clk", &div6_clks[DIV6_V]),
191
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192 /* MSTP clocks */
193 CLKDEV_CON_ID("uram0", &mstp_clks[HWBLK_URAM]),
194 CLKDEV_CON_ID("xymem0", &mstp_clks[HWBLK_XYMEM]),
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195 {
196 /* TMU0 */
197 .dev_id = "sh_tmu.0",
198 .con_id = "tmu_fck",
199 .clk = &mstp_clks[HWBLK_TMU],
200 }, {
201 /* TMU1 */
202 .dev_id = "sh_tmu.1",
203 .con_id = "tmu_fck",
204 .clk = &mstp_clks[HWBLK_TMU],
205 }, {
206 /* TMU2 */
207 .dev_id = "sh_tmu.2",
208 .con_id = "tmu_fck",
209 .clk = &mstp_clks[HWBLK_TMU],
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210 },
211 CLKDEV_CON_ID("cmt_fck", &mstp_clks[HWBLK_CMT]),
212 CLKDEV_CON_ID("rwdt0", &mstp_clks[HWBLK_RWDT]),
213 CLKDEV_CON_ID("flctl0", &mstp_clks[HWBLK_FLCTL]),
214 {
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215 /* SCIF0 */
216 .dev_id = "sh-sci.0",
217 .con_id = "sci_fck",
218 .clk = &mstp_clks[HWBLK_SCIF0],
219 }, {
220 /* SCIF1 */
221 .dev_id = "sh-sci.1",
222 .con_id = "sci_fck",
223 .clk = &mstp_clks[HWBLK_SCIF1],
224 }, {
225 /* SCIF2 */
226 .dev_id = "sh-sci.2",
227 .con_id = "sci_fck",
228 .clk = &mstp_clks[HWBLK_SCIF2],
229 },
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230 CLKDEV_CON_ID("i2c0", &mstp_clks[HWBLK_IIC]),
231 CLKDEV_CON_ID("rtc0", &mstp_clks[HWBLK_RTC]),
232 CLKDEV_CON_ID("sdhi0", &mstp_clks[HWBLK_SDHI]),
233 CLKDEV_CON_ID("keysc0", &mstp_clks[HWBLK_KEYSC]),
234 CLKDEV_CON_ID("usbf0", &mstp_clks[HWBLK_USBF]),
235 CLKDEV_CON_ID("2dg0", &mstp_clks[HWBLK_2DG]),
236 CLKDEV_CON_ID("siu0", &mstp_clks[HWBLK_SIU]),
237 CLKDEV_CON_ID("vou0", &mstp_clks[HWBLK_VOU]),
238 CLKDEV_CON_ID("jpu0", &mstp_clks[HWBLK_JPU]),
239 CLKDEV_CON_ID("beu0", &mstp_clks[HWBLK_BEU]),
240 CLKDEV_CON_ID("ceu0", &mstp_clks[HWBLK_CEU]),
241 CLKDEV_CON_ID("veu0", &mstp_clks[HWBLK_VEU]),
242 CLKDEV_CON_ID("vpu0", &mstp_clks[HWBLK_VPU]),
243 CLKDEV_CON_ID("lcdc0", &mstp_clks[HWBLK_LCDC]),
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244};
245
dfbbbe92 246int __init arch_clk_init(void)
1929cb34 247{
46e9371c 248 int k, ret = 0;
1929cb34 249
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250 /* autodetect extal or dll configuration */
251 if (__raw_readl(PLLCR) & 0x1000)
252 pll_clk.parent = &dll_clk;
253 else
254 pll_clk.parent = &extal_clk;
253b0887 255
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256 for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
257 ret = clk_register(main_clks[k]);
7c7e02a2 258
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259 clkdev_add_table(lookups, ARRAY_SIZE(lookups));
260
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261 if (!ret)
262 ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);
7c7e02a2 263
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264 if (!ret)
265 ret = sh_clk_div4_enable_register(div4_enable_clks,
266 DIV4_ENABLE_NR, &div4_table);
267
268 if (!ret)
269 ret = sh_clk_div4_reparent_register(div4_reparent_clks,
270 DIV4_REPARENT_NR, &div4_table);
271
46e9371c 272 if (!ret)
098ec49b 273 ret = sh_clk_div6_register(div6_clks, DIV6_NR);
aea167cb 274
46e9371c 275 if (!ret)
f3d51e13 276 ret = sh_hwblk_clk_register(mstp_clks, HWBLK_NR);
0c0daec7 277
46e9371c 278 return ret;
1929cb34 279}