sh: sh7343 div4 clkdev lookup
[linux-2.6-block.git] / arch / sh / kernel / cpu / sh4a / clock-sh7366.c
CommitLineData
4ed37394
MD
1/*
2 * arch/sh/kernel/cpu/sh4a/clock-sh7366.c
3 *
4 * SH7366 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>
098ec49b 24#include <asm/clkdev.h>
4ed37394
MD
25#include <asm/clock.h>
26
27/* SH7366 registers */
28#define FRQCR 0xa4150000
29#define VCLKCR 0xa4150004
30#define SCLKACR 0xa4150008
31#define SCLKBCR 0xa415000c
32#define PLLCR 0xa4150024
33#define MSTPCR0 0xa4150030
34#define MSTPCR1 0xa4150034
35#define MSTPCR2 0xa4150038
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,
43};
44
45/*
46 * Default rate for the root input clock, reset this with clk_set_rate()
47 * from the platform code.
48 */
49struct clk extal_clk = {
50 .name = "extal",
51 .id = -1,
52 .rate = 33333333,
53};
54
55/* The dll block multiplies the 32khz r_clk, may be used instead of extal */
56static unsigned long dll_recalc(struct clk *clk)
57{
58 unsigned long mult;
59
60 if (__raw_readl(PLLCR) & 0x1000)
61 mult = __raw_readl(DLLFRQ);
62 else
63 mult = 0;
64
65 return clk->parent->rate * mult;
66}
67
68static struct clk_ops dll_clk_ops = {
69 .recalc = dll_recalc,
70};
71
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};
79
80static unsigned long pll_recalc(struct clk *clk)
81{
82 unsigned long mult = 1;
83 unsigned long div = 1;
84
85 if (__raw_readl(PLLCR) & 0x4000)
86 mult = (((__raw_readl(FRQCR) >> 24) & 0x1f) + 1);
87 else
88 div = 2;
89
90 return (clk->parent->rate * mult) / div;
91}
92
93static struct clk_ops pll_clk_ops = {
94 .recalc = pll_recalc,
95};
96
97static struct clk pll_clk = {
98 .name = "pll_clk",
99 .id = -1,
100 .ops = &pll_clk_ops,
101 .flags = CLK_ENABLE_ON_INIT,
102};
103
104struct clk *main_clks[] = {
105 &r_clk,
106 &extal_clk,
107 &dll_clk,
108 &pll_clk,
109};
110
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 };
113
0a5f337e 114static struct clk_div_mult_table div4_div_mult_table = {
4ed37394
MD
115 .divisors = divisors,
116 .nr_divisors = ARRAY_SIZE(divisors),
117 .multipliers = multipliers,
118 .nr_multipliers = ARRAY_SIZE(multipliers),
119};
120
0a5f337e
MD
121static struct clk_div4_table div4_table = {
122 .div_mult_table = &div4_div_mult_table,
123};
124
4ed37394
MD
125enum { DIV4_I, DIV4_U, DIV4_SH, DIV4_B, DIV4_B3, DIV4_P,
126 DIV4_SIUA, DIV4_SIUB, DIV4_NR };
127
128#define DIV4(_str, _reg, _bit, _mask, _flags) \
129 SH_CLK_DIV4(_str, &pll_clk, _reg, _bit, _mask, _flags)
130
131struct clk div4_clks[DIV4_NR] = {
132 [DIV4_I] = DIV4("cpu_clk", FRQCR, 20, 0x1fef, CLK_ENABLE_ON_INIT),
133 [DIV4_U] = DIV4("umem_clk", FRQCR, 16, 0x1fff, CLK_ENABLE_ON_INIT),
134 [DIV4_SH] = DIV4("shyway_clk", FRQCR, 12, 0x1fff, CLK_ENABLE_ON_INIT),
135 [DIV4_B] = DIV4("bus_clk", FRQCR, 8, 0x1fff, CLK_ENABLE_ON_INIT),
136 [DIV4_B3] = DIV4("b3_clk", FRQCR, 4, 0x1fff, CLK_ENABLE_ON_INIT),
137 [DIV4_P] = DIV4("peripheral_clk", FRQCR, 0, 0x1fff, 0),
138 [DIV4_SIUA] = DIV4("siua_clk", SCLKACR, 0, 0x1fff, 0),
139 [DIV4_SIUB] = DIV4("siub_clk", SCLKBCR, 0, 0x1fff, 0),
140};
141
098ec49b
MD
142enum { DIV6_V, DIV6_NR };
143
144struct clk div6_clks[DIV6_NR] = {
9e1985e1 145 [DIV6_V] = SH_CLK_DIV6(&pll_clk, VCLKCR, 0),
4ed37394
MD
146};
147
c77a9c3e
MD
148#define MSTP(_parent, _reg, _bit, _flags) \
149 SH_CLK_MSTP32(_parent, _reg, _bit, _flags)
4ed37394 150
4780683a
MD
151enum { MSTP031, MSTP030, MSTP029, MSTP028, MSTP026,
152 MSTP023, MSTP022, MSTP021, MSTP020, MSTP019, MSTP018, MSTP017, MSTP016,
153 MSTP015, MSTP014, MSTP013, MSTP012, MSTP011, MSTP010,
154 MSTP007, MSTP006, MSTP005, MSTP002, MSTP001,
155 MSTP109, MSTP100,
156 MSTP227, MSTP226, MSTP224, MSTP223, MSTP222, MSTP218, MSTP217,
157 MSTP211, MSTP207, MSTP205, MSTP204, MSTP203, MSTP202, MSTP201, MSTP200,
158 MSTP_NR };
159
160static struct clk mstp_clks[MSTP_NR] = {
4ed37394 161 /* See page 52 of Datasheet V0.40: Overview -> Block Diagram */
c77a9c3e
MD
162 [MSTP031] = MSTP(&div4_clks[DIV4_I], MSTPCR0, 31, CLK_ENABLE_ON_INIT),
163 [MSTP030] = MSTP(&div4_clks[DIV4_I], MSTPCR0, 30, CLK_ENABLE_ON_INIT),
164 [MSTP029] = MSTP(&div4_clks[DIV4_I], MSTPCR0, 29, CLK_ENABLE_ON_INIT),
165 [MSTP028] = MSTP(&div4_clks[DIV4_SH], MSTPCR0, 28, CLK_ENABLE_ON_INIT),
166 [MSTP026] = MSTP(&div4_clks[DIV4_B], MSTPCR0, 26, CLK_ENABLE_ON_INIT),
167 [MSTP023] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 23, 0),
168 [MSTP022] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 22, 0),
169 [MSTP021] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 21, 0),
170 [MSTP020] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 20, 0),
171 [MSTP019] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 19, 0),
172 [MSTP017] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 17, 0),
173 [MSTP015] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 15, 0),
174 [MSTP014] = MSTP(&r_clk, MSTPCR0, 14, 0),
175 [MSTP013] = MSTP(&r_clk, MSTPCR0, 13, 0),
176 [MSTP011] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 11, 0),
177 [MSTP010] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 10, 0),
178 [MSTP007] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 7, 0),
179 [MSTP006] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 6, 0),
180 [MSTP005] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 5, 0),
181 [MSTP002] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 2, 0),
182 [MSTP001] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 1, 0),
183
184 [MSTP109] = MSTP(&div4_clks[DIV4_P], MSTPCR1, 9, 0),
185
186 [MSTP227] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 27, 0),
187 [MSTP226] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 26, 0),
188 [MSTP224] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 24, 0),
189 [MSTP223] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 23, 0),
190 [MSTP222] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 22, 0),
191 [MSTP218] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 18, 0),
192 [MSTP217] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 17, 0),
193 [MSTP211] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 11, 0),
194 [MSTP207] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 7, CLK_ENABLE_ON_INIT),
195 [MSTP205] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 5, 0),
196 [MSTP204] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 4, 0),
197 [MSTP203] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 3, 0),
198 [MSTP202] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 2, CLK_ENABLE_ON_INIT),
199 [MSTP201] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 1, CLK_ENABLE_ON_INIT),
200 [MSTP200] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 0, 0),
4ed37394
MD
201};
202
098ec49b
MD
203#define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk }
204
205static struct clk_lookup lookups[] = {
206 /* DIV6 clocks */
207 CLKDEV_CON_ID("video_clk", &div6_clks[DIV6_V]),
b87cecef
MD
208
209 /* MSTP32 clocks */
210 CLKDEV_CON_ID("tlb0", &mstp_clks[MSTP031]),
211 CLKDEV_CON_ID("ic0", &mstp_clks[MSTP030]),
212 CLKDEV_CON_ID("oc0", &mstp_clks[MSTP029]),
213 CLKDEV_CON_ID("rsmem0", &mstp_clks[MSTP028]),
214 CLKDEV_CON_ID("xymem0", &mstp_clks[MSTP026]),
215 CLKDEV_CON_ID("intc3", &mstp_clks[MSTP023]),
216 CLKDEV_CON_ID("intc0", &mstp_clks[MSTP022]),
217 CLKDEV_CON_ID("dmac0", &mstp_clks[MSTP021]),
218 CLKDEV_CON_ID("sh0", &mstp_clks[MSTP020]),
219 CLKDEV_CON_ID("hudi0", &mstp_clks[MSTP019]),
220 CLKDEV_CON_ID("ubc0", &mstp_clks[MSTP017]),
221 CLKDEV_CON_ID("tmu_fck", &mstp_clks[MSTP015]),
222 CLKDEV_CON_ID("cmt_fck", &mstp_clks[MSTP014]),
223 CLKDEV_CON_ID("rwdt0", &mstp_clks[MSTP013]),
224 CLKDEV_CON_ID("mfi0", &mstp_clks[MSTP011]),
225 CLKDEV_CON_ID("flctl0", &mstp_clks[MSTP010]),
226 {
227 /* SCIF0 */
228 .dev_id = "sh-sci.0",
229 .con_id = "sci_fck",
230 .clk = &mstp_clks[MSTP007],
231 }, {
232 /* SCIF1 */
233 .dev_id = "sh-sci.1",
234 .con_id = "sci_fck",
235 .clk = &mstp_clks[MSTP006],
236 }, {
237 /* SCIF2 */
238 .dev_id = "sh-sci.2",
239 .con_id = "sci_fck",
240 .clk = &mstp_clks[MSTP005],
241 },
242 CLKDEV_CON_ID("msiof0", &mstp_clks[MSTP002]),
243 CLKDEV_CON_ID("sbr0", &mstp_clks[MSTP001]),
244 CLKDEV_CON_ID("i2c0", &mstp_clks[MSTP109]),
245 CLKDEV_CON_ID("icb0", &mstp_clks[MSTP227]),
246 CLKDEV_CON_ID("meram0", &mstp_clks[MSTP226]),
247 CLKDEV_CON_ID("dacy1", &mstp_clks[MSTP224]),
248 CLKDEV_CON_ID("dacy0", &mstp_clks[MSTP223]),
249 CLKDEV_CON_ID("tsif0", &mstp_clks[MSTP222]),
250 CLKDEV_CON_ID("sdhi0", &mstp_clks[MSTP218]),
251 CLKDEV_CON_ID("mmcif0", &mstp_clks[MSTP217]),
252 CLKDEV_CON_ID("usbf0", &mstp_clks[MSTP211]),
253 CLKDEV_CON_ID("veu1", &mstp_clks[MSTP207]),
254 CLKDEV_CON_ID("vou0", &mstp_clks[MSTP205]),
255 CLKDEV_CON_ID("beu0", &mstp_clks[MSTP204]),
256 CLKDEV_CON_ID("ceu0", &mstp_clks[MSTP203]),
257 CLKDEV_CON_ID("veu0", &mstp_clks[MSTP202]),
258 CLKDEV_CON_ID("vpu0", &mstp_clks[MSTP201]),
259 CLKDEV_CON_ID("lcdc0", &mstp_clks[MSTP200]),
098ec49b
MD
260};
261
4ed37394
MD
262int __init arch_clk_init(void)
263{
264 int k, ret = 0;
265
266 /* autodetect extal or dll configuration */
267 if (__raw_readl(PLLCR) & 0x1000)
268 pll_clk.parent = &dll_clk;
269 else
270 pll_clk.parent = &extal_clk;
271
272 for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
273 ret = clk_register(main_clks[k]);
274
098ec49b
MD
275 clkdev_add_table(lookups, ARRAY_SIZE(lookups));
276
4ed37394
MD
277 if (!ret)
278 ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);
279
280 if (!ret)
098ec49b 281 ret = sh_clk_div6_register(div6_clks, DIV6_NR);
4ed37394
MD
282
283 if (!ret)
4780683a 284 ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR);
4ed37394
MD
285
286 return ret;
287}