1 /* 2 * arch/sh/kernel/cpu/sh4a/clock-sh7734.c 3 * 4 * Clock framework for SH7734 5 * 6 * Copyright (C) 2011, 2012 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com> 7 * Copyright (C) 2011, 2012 Renesas Solutions Corp. 8 * 9 * This file is subject to the terms and conditions of the GNU General Public 10 * License. See the file "COPYING" in the main directory of this archive 11 * for more details. 12 */ 13 14 #include <linux/init.h> 15 #include <linux/kernel.h> 16 #include <linux/io.h> 17 #include <linux/clkdev.h> 18 #include <linux/delay.h> 19 #include <asm/clock.h> 20 #include <asm/freq.h> 21 22 static struct clk extal_clk = { 23 .rate = 33333333, 24 }; 25 26 #define MODEMR (0xFFCC0020) 27 #define MODEMR_MASK (0x6) 28 #define MODEMR_533MHZ (0x2) 29 30 static unsigned long pll_recalc(struct clk *clk) 31 { 32 int mode = 12; 33 u32 r = __raw_readl(MODEMR); 34 35 if ((r & MODEMR_MASK) & MODEMR_533MHZ) 36 mode = 16; 37 38 return clk->parent->rate * mode; 39 } 40 41 static struct sh_clk_ops pll_clk_ops = { 42 .recalc = pll_recalc, 43 }; 44 45 static struct clk pll_clk = { 46 .ops = &pll_clk_ops, 47 .parent = &extal_clk, 48 .flags = CLK_ENABLE_ON_INIT, 49 }; 50 51 static struct clk *main_clks[] = { 52 &extal_clk, 53 &pll_clk, 54 }; 55 56 static int multipliers[] = { 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 }; 57 static int divisors[] = { 1, 3, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24 }; 58 59 static struct clk_div_mult_table div4_div_mult_table = { 60 .divisors = divisors, 61 .nr_divisors = ARRAY_SIZE(divisors), 62 .multipliers = multipliers, 63 .nr_multipliers = ARRAY_SIZE(multipliers), 64 }; 65 66 static struct clk_div4_table div4_table = { 67 .div_mult_table = &div4_div_mult_table, 68 }; 69 70 enum { DIV4_I, DIV4_S, DIV4_B, DIV4_M, DIV4_S1, DIV4_P, DIV4_NR }; 71 72 #define DIV4(_reg, _bit, _mask, _flags) \ 73 SH_CLK_DIV4(&pll_clk, _reg, _bit, _mask, _flags) 74 75 struct clk div4_clks[DIV4_NR] = { 76 [DIV4_I] = DIV4(FRQMR1, 28, 0x0003, CLK_ENABLE_ON_INIT), 77 [DIV4_S] = DIV4(FRQMR1, 20, 0x000C, CLK_ENABLE_ON_INIT), 78 [DIV4_B] = DIV4(FRQMR1, 16, 0x0140, CLK_ENABLE_ON_INIT), 79 [DIV4_M] = DIV4(FRQMR1, 12, 0x0004, CLK_ENABLE_ON_INIT), 80 [DIV4_S1] = DIV4(FRQMR1, 4, 0x0030, CLK_ENABLE_ON_INIT), 81 [DIV4_P] = DIV4(FRQMR1, 0, 0x0140, CLK_ENABLE_ON_INIT), 82 }; 83 84 #define MSTPCR0 0xFFC80030 85 #define MSTPCR1 0xFFC80034 86 #define MSTPCR3 0xFFC8003C 87 88 enum { 89 MSTP030, MSTP029, /* IIC */ 90 MSTP026, MSTP025, MSTP024, /* SCIF */ 91 MSTP023, 92 MSTP022, MSTP021, 93 MSTP019, /* HSCIF */ 94 MSTP016, MSTP015, MSTP014, /* TMU / TIMER */ 95 MSTP012, MSTP011, MSTP010, MSTP009, MSTP008, /* SSI */ 96 MSTP007, /* HSPI */ 97 MSTP115, /* ADMAC */ 98 MSTP114, /* GETHER */ 99 MSTP111, /* DMAC */ 100 MSTP109, /* VIDEOIN1 */ 101 MSTP108, /* VIDEOIN0 */ 102 MSTP107, /* RGPVBG */ 103 MSTP106, /* 2DG */ 104 MSTP103, /* VIEW */ 105 MSTP100, /* USB */ 106 MSTP331, /* MMC */ 107 MSTP330, /* MIMLB */ 108 MSTP323, /* SDHI0 */ 109 MSTP322, /* SDHI1 */ 110 MSTP321, /* SDHI2 */ 111 MSTP320, /* RQSPI */ 112 MSTP319, /* SRC0 */ 113 MSTP318, /* SRC1 */ 114 MSTP317, /* RSPI */ 115 MSTP316, /* RCAN0 */ 116 MSTP315, /* RCAN1 */ 117 MSTP314, /* FLTCL */ 118 MSTP313, /* ADC */ 119 MSTP312, /* MTU */ 120 MSTP304, /* IE-BUS */ 121 MSTP303, /* RTC */ 122 MSTP302, /* HIF */ 123 MSTP301, /* STIF0 */ 124 MSTP300, /* STIF1 */ 125 MSTP_NR }; 126 127 static struct clk mstp_clks[MSTP_NR] = { 128 /* MSTPCR0 */ 129 [MSTP030] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 30, 0), 130 [MSTP029] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 29, 0), 131 [MSTP026] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 26, 0), 132 [MSTP025] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 25, 0), 133 [MSTP024] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 24, 0), 134 [MSTP023] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 23, 0), 135 [MSTP022] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 22, 0), 136 [MSTP021] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 21, 0), 137 [MSTP019] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 19, 0), 138 [MSTP016] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 16, 0), 139 [MSTP015] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 15, 0), 140 [MSTP014] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 14, 0), 141 [MSTP012] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 12, 0), 142 [MSTP011] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 11, 0), 143 [MSTP010] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 10, 0), 144 [MSTP009] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 9, 0), 145 [MSTP008] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 8, 0), 146 [MSTP007] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 7, 0), 147 148 /* MSTPCR1 */ 149 [MSTP115] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 15, 0), 150 [MSTP114] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 14, 0), 151 [MSTP111] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 11, 0), 152 [MSTP109] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 9, 0), 153 [MSTP108] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 8, 0), 154 [MSTP107] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 7, 0), 155 [MSTP106] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 6, 0), 156 [MSTP103] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 3, 0), 157 [MSTP100] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 0, 0), 158 159 /* MSTPCR3 */ 160 [MSTP331] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 31, 0), 161 [MSTP330] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 30, 0), 162 [MSTP323] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 23, 0), 163 [MSTP322] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 22, 0), 164 [MSTP321] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 21, 0), 165 [MSTP320] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 20, 0), 166 [MSTP319] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 19, 0), 167 [MSTP318] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 18, 0), 168 [MSTP317] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 17, 0), 169 [MSTP316] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 16, 0), 170 [MSTP315] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 15, 0), 171 [MSTP314] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 14, 0), 172 [MSTP313] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 13, 0), 173 [MSTP312] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 12, 0), 174 [MSTP304] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 4, 0), 175 [MSTP303] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 3, 0), 176 [MSTP302] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 2, 0), 177 [MSTP301] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 1, 0), 178 [MSTP300] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR3, 0, 0), 179 }; 180 181 static struct clk_lookup lookups[] = { 182 /* main clocks */ 183 CLKDEV_CON_ID("extal", &extal_clk), 184 CLKDEV_CON_ID("pll_clk", &pll_clk), 185 186 /* clocks */ 187 CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]), 188 CLKDEV_CON_ID("shyway_clk", &div4_clks[DIV4_S]), 189 CLKDEV_CON_ID("ddr_clk", &div4_clks[DIV4_M]), 190 CLKDEV_CON_ID("bus_clk", &div4_clks[DIV4_B]), 191 CLKDEV_CON_ID("shyway_clk1", &div4_clks[DIV4_S1]), 192 CLKDEV_CON_ID("peripheral_clk", &div4_clks[DIV4_P]), 193 194 /* MSTP32 clocks */ 195 CLKDEV_DEV_ID("i2c-sh7734.0", &mstp_clks[MSTP030]), 196 CLKDEV_DEV_ID("i2c-sh7734.1", &mstp_clks[MSTP029]), 197 CLKDEV_ICK_ID("fck", "sh-sci.0", &mstp_clks[MSTP026]), 198 CLKDEV_ICK_ID("fck", "sh-sci.1", &mstp_clks[MSTP025]), 199 CLKDEV_ICK_ID("fck", "sh-sci.2", &mstp_clks[MSTP024]), 200 CLKDEV_ICK_ID("fck", "sh-sci.3", &mstp_clks[MSTP023]), 201 CLKDEV_ICK_ID("fck", "sh-sci.4", &mstp_clks[MSTP022]), 202 CLKDEV_ICK_ID("fck", "sh-sci.5", &mstp_clks[MSTP021]), 203 CLKDEV_CON_ID("hscif", &mstp_clks[MSTP019]), 204 CLKDEV_ICK_ID("fck", "sh-tmu.0", &mstp_clks[MSTP016]), 205 CLKDEV_ICK_ID("fck", "sh-tmu.1", &mstp_clks[MSTP015]), 206 CLKDEV_ICK_ID("fck", "sh-tmu.2", &mstp_clks[MSTP014]), 207 CLKDEV_CON_ID("ssi0", &mstp_clks[MSTP012]), 208 CLKDEV_CON_ID("ssi1", &mstp_clks[MSTP011]), 209 CLKDEV_CON_ID("ssi2", &mstp_clks[MSTP010]), 210 CLKDEV_CON_ID("ssi3", &mstp_clks[MSTP009]), 211 CLKDEV_CON_ID("sss", &mstp_clks[MSTP008]), 212 CLKDEV_CON_ID("hspi", &mstp_clks[MSTP007]), 213 CLKDEV_CON_ID("usb_fck", &mstp_clks[MSTP100]), 214 CLKDEV_CON_ID("videoin0", &mstp_clks[MSTP109]), 215 CLKDEV_CON_ID("videoin1", &mstp_clks[MSTP108]), 216 CLKDEV_CON_ID("rgpvg", &mstp_clks[MSTP107]), 217 CLKDEV_CON_ID("2dg", &mstp_clks[MSTP106]), 218 CLKDEV_CON_ID("view", &mstp_clks[MSTP103]), 219 220 CLKDEV_CON_ID("mmc0", &mstp_clks[MSTP331]), 221 CLKDEV_CON_ID("mimlb0", &mstp_clks[MSTP330]), 222 CLKDEV_CON_ID("sdhi0", &mstp_clks[MSTP323]), 223 CLKDEV_CON_ID("sdhi1", &mstp_clks[MSTP322]), 224 CLKDEV_CON_ID("sdhi2", &mstp_clks[MSTP321]), 225 CLKDEV_CON_ID("rqspi0", &mstp_clks[MSTP320]), 226 CLKDEV_CON_ID("src0", &mstp_clks[MSTP319]), 227 CLKDEV_CON_ID("src1", &mstp_clks[MSTP318]), 228 CLKDEV_CON_ID("rsp0", &mstp_clks[MSTP317]), 229 CLKDEV_CON_ID("rcan0", &mstp_clks[MSTP316]), 230 CLKDEV_CON_ID("rcan1", &mstp_clks[MSTP315]), 231 CLKDEV_CON_ID("fltcl0", &mstp_clks[MSTP314]), 232 CLKDEV_CON_ID("adc0", &mstp_clks[MSTP313]), 233 CLKDEV_CON_ID("mtu0", &mstp_clks[MSTP312]), 234 CLKDEV_CON_ID("iebus0", &mstp_clks[MSTP304]), 235 CLKDEV_DEV_ID("sh7734-gether.0", &mstp_clks[MSTP114]), 236 CLKDEV_CON_ID("rtc0", &mstp_clks[MSTP303]), 237 CLKDEV_CON_ID("hif0", &mstp_clks[MSTP302]), 238 CLKDEV_CON_ID("stif0", &mstp_clks[MSTP301]), 239 CLKDEV_CON_ID("stif1", &mstp_clks[MSTP300]), 240 }; 241 242 int __init arch_clk_init(void) 243 { 244 int i, ret = 0; 245 246 for (i = 0; i < ARRAY_SIZE(main_clks); i++) 247 ret |= clk_register(main_clks[i]); 248 249 clkdev_add_table(lookups, ARRAY_SIZE(lookups)); 250 251 if (!ret) 252 ret = sh_clk_div4_register(div4_clks, ARRAY_SIZE(div4_clks), 253 &div4_table); 254 255 if (!ret) 256 ret = sh_clk_mstp_register(mstp_clks, MSTP_NR); 257 258 return ret; 259 } 260