2 * arch/sh/kernel/cpu/sh4a/clock-sh7343.c
4 * SH7343 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/clkdev.h>
25 #include <asm/clock.h>
27 /* SH7343 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
38 /* Fixed 32 KHz root clock for RTC and Power Management purposes */
39 static struct clk r_clk = {
46 * Default rate for the root input clock, reset this with clk_set_rate()
47 * from the platform code.
49 struct clk extal_clk = {
55 /* The dll block multiplies the 32khz r_clk, may be used instead of extal */
56 static unsigned long dll_recalc(struct clk *clk)
60 if (__raw_readl(PLLCR) & 0x1000)
61 mult = __raw_readl(DLLFRQ);
65 return clk->parent->rate * mult;
68 static struct clk_ops dll_clk_ops = {
72 static struct clk dll_clk = {
77 .flags = CLK_ENABLE_ON_INIT,
80 static unsigned long pll_recalc(struct clk *clk)
82 unsigned long mult = 1;
84 if (__raw_readl(PLLCR) & 0x4000)
85 mult = (((__raw_readl(FRQCR) >> 24) & 0x1f) + 1);
87 return clk->parent->rate * mult;
90 static struct clk_ops pll_clk_ops = {
94 static struct clk pll_clk = {
98 .flags = CLK_ENABLE_ON_INIT,
101 struct clk *main_clks[] = {
108 static int multipliers[] = { 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1 };
109 static int divisors[] = { 1, 3, 2, 5, 3, 4, 5, 6, 8, 10, 12, 16, 20 };
111 static struct clk_div_mult_table div4_div_mult_table = {
112 .divisors = divisors,
113 .nr_divisors = ARRAY_SIZE(divisors),
114 .multipliers = multipliers,
115 .nr_multipliers = ARRAY_SIZE(multipliers),
118 static struct clk_div4_table div4_table = {
119 .div_mult_table = &div4_div_mult_table,
122 enum { DIV4_I, DIV4_U, DIV4_SH, DIV4_B, DIV4_B3, DIV4_P,
123 DIV4_SIUA, DIV4_SIUB, DIV4_NR };
125 #define DIV4(_str, _reg, _bit, _mask, _flags) \
126 SH_CLK_DIV4(_str, &pll_clk, _reg, _bit, _mask, _flags)
128 struct clk div4_clks[DIV4_NR] = {
129 [DIV4_I] = DIV4("cpu_clk", FRQCR, 20, 0x1fff, CLK_ENABLE_ON_INIT),
130 [DIV4_U] = DIV4("umem_clk", FRQCR, 16, 0x1fff, CLK_ENABLE_ON_INIT),
131 [DIV4_SH] = DIV4("shyway_clk", FRQCR, 12, 0x1fff, CLK_ENABLE_ON_INIT),
132 [DIV4_B] = DIV4("bus_clk", FRQCR, 8, 0x1fff, CLK_ENABLE_ON_INIT),
133 [DIV4_B3] = DIV4("b3_clk", FRQCR, 4, 0x1fff, CLK_ENABLE_ON_INIT),
134 [DIV4_P] = DIV4("peripheral_clk", FRQCR, 0, 0x1fff, 0),
135 [DIV4_SIUA] = DIV4("siua_clk", SCLKACR, 0, 0x1fff, 0),
136 [DIV4_SIUB] = DIV4("siub_clk", SCLKBCR, 0, 0x1fff, 0),
139 enum { DIV6_V, DIV6_NR };
141 struct clk div6_clks[DIV6_NR] = {
142 [DIV6_V] = SH_CLK_DIV6(&pll_clk, VCLKCR, 0),
145 #define MSTP(_str, _parent, _reg, _bit, _flags) \
146 SH_CLK_MSTP32(_str, -1, _parent, _reg, _bit, _flags)
148 enum { MSTP031, MSTP030, MSTP029, MSTP028, MSTP026,
149 MSTP023, MSTP022, MSTP021, MSTP020, MSTP019, MSTP018, MSTP017, MSTP016,
150 MSTP015, MSTP014, MSTP013, MSTP012, MSTP011, MSTP010,
151 MSTP007, MSTP006, MSTP005, MSTP004, MSTP003, MSTP002, MSTP001,
152 MSTP109, MSTP108, MSTP100,
153 MSTP225, MSTP224, MSTP218, MSTP217, MSTP216,
154 MSTP214, MSTP213, MSTP212, MSTP211, MSTP208,
155 MSTP206, MSTP205, MSTP204, MSTP203, MSTP202, MSTP201, MSTP200,
158 static struct clk mstp_clks[MSTP_NR] = {
159 [MSTP031] = MSTP("tlb0", &div4_clks[DIV4_I], MSTPCR0, 31, CLK_ENABLE_ON_INIT),
160 [MSTP030] = MSTP("ic0", &div4_clks[DIV4_I], MSTPCR0, 30, CLK_ENABLE_ON_INIT),
161 [MSTP029] = MSTP("oc0", &div4_clks[DIV4_I], MSTPCR0, 29, CLK_ENABLE_ON_INIT),
162 [MSTP028] = MSTP("uram0", &div4_clks[DIV4_U], MSTPCR0, 28, CLK_ENABLE_ON_INIT),
163 [MSTP026] = MSTP("xymem0", &div4_clks[DIV4_B], MSTPCR0, 26, CLK_ENABLE_ON_INIT),
164 [MSTP023] = MSTP("intc3", &div4_clks[DIV4_P], MSTPCR0, 23, 0),
165 [MSTP022] = MSTP("intc0", &div4_clks[DIV4_P], MSTPCR0, 22, 0),
166 [MSTP021] = MSTP("dmac0", &div4_clks[DIV4_P], MSTPCR0, 21, 0),
167 [MSTP020] = MSTP("sh0", &div4_clks[DIV4_P], MSTPCR0, 20, 0),
168 [MSTP019] = MSTP("hudi0", &div4_clks[DIV4_P], MSTPCR0, 19, 0),
169 [MSTP017] = MSTP("ubc0", &div4_clks[DIV4_P], MSTPCR0, 17, 0),
170 [MSTP015] = MSTP("tmu_fck", &div4_clks[DIV4_P], MSTPCR0, 15, 0),
171 [MSTP014] = MSTP("cmt_fck", &r_clk, MSTPCR0, 14, 0),
172 [MSTP013] = MSTP("rwdt0", &r_clk, MSTPCR0, 13, 0),
173 [MSTP011] = MSTP("mfi0", &div4_clks[DIV4_P], MSTPCR0, 11, 0),
174 [MSTP010] = MSTP("flctl0", &div4_clks[DIV4_P], MSTPCR0, 10, 0),
175 [MSTP007] = SH_CLK_MSTP32("sci_fck", 0, &div4_clks[DIV4_P], MSTPCR0, 7, 0),
176 [MSTP006] = SH_CLK_MSTP32("sci_fck", 1, &div4_clks[DIV4_P], MSTPCR0, 6, 0),
177 [MSTP005] = SH_CLK_MSTP32("sci_fck", 2, &div4_clks[DIV4_P], MSTPCR0, 5, 0),
178 [MSTP004] = SH_CLK_MSTP32("sci_fck", 3, &div4_clks[DIV4_P], MSTPCR0, 4, 0),
179 [MSTP003] = MSTP("sio0", &div4_clks[DIV4_P], MSTPCR0, 3, 0),
180 [MSTP002] = MSTP("siof0", &div4_clks[DIV4_P], MSTPCR0, 2, 0),
181 [MSTP001] = MSTP("siof1", &div4_clks[DIV4_P], MSTPCR0, 1, 0),
183 [MSTP109] = MSTP("i2c0", &div4_clks[DIV4_P], MSTPCR1, 9, 0),
184 [MSTP108] = MSTP("i2c1", &div4_clks[DIV4_P], MSTPCR1, 8, 0),
186 [MSTP225] = MSTP("tpu0", &div4_clks[DIV4_P], MSTPCR2, 25, 0),
187 [MSTP224] = MSTP("irda0", &div4_clks[DIV4_P], MSTPCR2, 24, 0),
188 [MSTP218] = MSTP("sdhi0", &div4_clks[DIV4_P], MSTPCR2, 18, 0),
189 [MSTP217] = MSTP("mmcif0", &div4_clks[DIV4_P], MSTPCR2, 17, 0),
190 [MSTP216] = MSTP("sim0", &div4_clks[DIV4_P], MSTPCR2, 16, 0),
191 [MSTP214] = MSTP("keysc0", &r_clk, MSTPCR2, 14, 0),
192 [MSTP213] = MSTP("tsif0", &div4_clks[DIV4_P], MSTPCR2, 13, 0),
193 [MSTP212] = MSTP("s3d40", &div4_clks[DIV4_P], MSTPCR2, 12, 0),
194 [MSTP211] = MSTP("usbf0", &div4_clks[DIV4_P], MSTPCR2, 11, 0),
195 [MSTP208] = MSTP("siu0", &div4_clks[DIV4_B], MSTPCR2, 8, 0),
196 [MSTP206] = MSTP("jpu0", &div4_clks[DIV4_B], MSTPCR2, 6, CLK_ENABLE_ON_INIT),
197 [MSTP205] = MSTP("vou0", &div4_clks[DIV4_B], MSTPCR2, 5, 0),
198 [MSTP204] = MSTP("beu0", &div4_clks[DIV4_B], MSTPCR2, 4, 0),
199 [MSTP203] = MSTP("ceu0", &div4_clks[DIV4_B], MSTPCR2, 3, 0),
200 [MSTP202] = MSTP("veu0", &div4_clks[DIV4_B], MSTPCR2, 2, CLK_ENABLE_ON_INIT),
201 [MSTP201] = MSTP("vpu0", &div4_clks[DIV4_B], MSTPCR2, 1, CLK_ENABLE_ON_INIT),
202 [MSTP200] = MSTP("lcdc0", &div4_clks[DIV4_B], MSTPCR2, 0, 0),
205 #define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk }
207 static struct clk_lookup lookups[] = {
209 CLKDEV_CON_ID("video_clk", &div6_clks[DIV6_V]),
212 int __init arch_clk_init(void)
216 /* autodetect extal or dll configuration */
217 if (__raw_readl(PLLCR) & 0x1000)
218 pll_clk.parent = &dll_clk;
220 pll_clk.parent = &extal_clk;
222 for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
223 ret = clk_register(main_clks[k]);
225 clkdev_add_table(lookups, ARRAY_SIZE(lookups));
228 ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);
231 ret = sh_clk_div6_register(div6_clks, DIV6_NR);
234 ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR);