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> 24 #include <linux/clkdev.h> 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 */ 39 static struct clk r_clk = { 40 .rate = 32768, 41 }; 42 43 /* 44 * Default rate for the root input clock, reset this with clk_set_rate() 45 * from the platform code. 46 */ 47 struct clk extal_clk = { 48 .rate = 33333333, 49 }; 50 51 /* The dll block multiplies the 32khz r_clk, may be used instead of extal */ 52 static unsigned long dll_recalc(struct clk *clk) 53 { 54 unsigned long mult; 55 56 if (__raw_readl(PLLCR) & 0x1000) 57 mult = __raw_readl(DLLFRQ); 58 else 59 mult = 0; 60 61 return clk->parent->rate * mult; 62 } 63 64 static struct clk_ops dll_clk_ops = { 65 .recalc = dll_recalc, 66 }; 67 68 static struct clk dll_clk = { 69 .ops = &dll_clk_ops, 70 .parent = &r_clk, 71 .flags = CLK_ENABLE_ON_INIT, 72 }; 73 74 static unsigned long pll_recalc(struct clk *clk) 75 { 76 unsigned long mult = 1; 77 unsigned long div = 1; 78 79 if (__raw_readl(PLLCR) & 0x4000) 80 mult = (((__raw_readl(FRQCR) >> 24) & 0x1f) + 1); 81 else 82 div = 2; 83 84 return (clk->parent->rate * mult) / div; 85 } 86 87 static struct clk_ops pll_clk_ops = { 88 .recalc = pll_recalc, 89 }; 90 91 static struct clk pll_clk = { 92 .ops = &pll_clk_ops, 93 .flags = CLK_ENABLE_ON_INIT, 94 }; 95 96 struct clk *main_clks[] = { 97 &r_clk, 98 &extal_clk, 99 &dll_clk, 100 &pll_clk, 101 }; 102 103 static int multipliers[] = { 1, 2, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1 }; 104 static int divisors[] = { 1, 3, 2, 5, 3, 4, 5, 6, 8, 10, 12, 16, 20 }; 105 106 static struct clk_div_mult_table div4_div_mult_table = { 107 .divisors = divisors, 108 .nr_divisors = ARRAY_SIZE(divisors), 109 .multipliers = multipliers, 110 .nr_multipliers = ARRAY_SIZE(multipliers), 111 }; 112 113 static struct clk_div4_table div4_table = { 114 .div_mult_table = &div4_div_mult_table, 115 }; 116 117 enum { DIV4_I, DIV4_U, DIV4_SH, DIV4_B, DIV4_B3, DIV4_P, 118 DIV4_SIUA, DIV4_SIUB, DIV4_NR }; 119 120 #define DIV4(_reg, _bit, _mask, _flags) \ 121 SH_CLK_DIV4(&pll_clk, _reg, _bit, _mask, _flags) 122 123 struct clk div4_clks[DIV4_NR] = { 124 [DIV4_I] = DIV4(FRQCR, 20, 0x1fef, CLK_ENABLE_ON_INIT), 125 [DIV4_U] = DIV4(FRQCR, 16, 0x1fff, CLK_ENABLE_ON_INIT), 126 [DIV4_SH] = DIV4(FRQCR, 12, 0x1fff, CLK_ENABLE_ON_INIT), 127 [DIV4_B] = DIV4(FRQCR, 8, 0x1fff, CLK_ENABLE_ON_INIT), 128 [DIV4_B3] = DIV4(FRQCR, 4, 0x1fff, CLK_ENABLE_ON_INIT), 129 [DIV4_P] = DIV4(FRQCR, 0, 0x1fff, 0), 130 [DIV4_SIUA] = DIV4(SCLKACR, 0, 0x1fff, 0), 131 [DIV4_SIUB] = DIV4(SCLKBCR, 0, 0x1fff, 0), 132 }; 133 134 enum { DIV6_V, DIV6_NR }; 135 136 struct clk div6_clks[DIV6_NR] = { 137 [DIV6_V] = SH_CLK_DIV6(&pll_clk, VCLKCR, 0), 138 }; 139 140 #define MSTP(_parent, _reg, _bit, _flags) \ 141 SH_CLK_MSTP32(_parent, _reg, _bit, _flags) 142 143 enum { MSTP031, MSTP030, MSTP029, MSTP028, MSTP026, 144 MSTP023, MSTP022, MSTP021, MSTP020, MSTP019, MSTP018, MSTP017, MSTP016, 145 MSTP015, MSTP014, MSTP013, MSTP012, MSTP011, MSTP010, 146 MSTP007, MSTP006, MSTP005, MSTP002, MSTP001, 147 MSTP109, MSTP100, 148 MSTP227, MSTP226, MSTP224, MSTP223, MSTP222, MSTP218, MSTP217, 149 MSTP211, MSTP207, MSTP205, MSTP204, MSTP203, MSTP202, MSTP201, MSTP200, 150 MSTP_NR }; 151 152 static struct clk mstp_clks[MSTP_NR] = { 153 /* See page 52 of Datasheet V0.40: Overview -> Block Diagram */ 154 [MSTP031] = MSTP(&div4_clks[DIV4_I], MSTPCR0, 31, CLK_ENABLE_ON_INIT), 155 [MSTP030] = MSTP(&div4_clks[DIV4_I], MSTPCR0, 30, CLK_ENABLE_ON_INIT), 156 [MSTP029] = MSTP(&div4_clks[DIV4_I], MSTPCR0, 29, CLK_ENABLE_ON_INIT), 157 [MSTP028] = MSTP(&div4_clks[DIV4_SH], MSTPCR0, 28, CLK_ENABLE_ON_INIT), 158 [MSTP026] = MSTP(&div4_clks[DIV4_B], MSTPCR0, 26, CLK_ENABLE_ON_INIT), 159 [MSTP023] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 23, 0), 160 [MSTP022] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 22, 0), 161 [MSTP021] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 21, 0), 162 [MSTP020] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 20, 0), 163 [MSTP019] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 19, 0), 164 [MSTP017] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 17, 0), 165 [MSTP015] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 15, 0), 166 [MSTP014] = MSTP(&r_clk, MSTPCR0, 14, 0), 167 [MSTP013] = MSTP(&r_clk, MSTPCR0, 13, 0), 168 [MSTP011] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 11, 0), 169 [MSTP010] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 10, 0), 170 [MSTP007] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 7, 0), 171 [MSTP006] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 6, 0), 172 [MSTP005] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 5, 0), 173 [MSTP002] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 2, 0), 174 [MSTP001] = MSTP(&div4_clks[DIV4_P], MSTPCR0, 1, 0), 175 176 [MSTP109] = MSTP(&div4_clks[DIV4_P], MSTPCR1, 9, 0), 177 178 [MSTP227] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 27, 0), 179 [MSTP226] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 26, 0), 180 [MSTP224] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 24, 0), 181 [MSTP223] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 23, 0), 182 [MSTP222] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 22, 0), 183 [MSTP218] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 18, 0), 184 [MSTP217] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 17, 0), 185 [MSTP211] = MSTP(&div4_clks[DIV4_P], MSTPCR2, 11, 0), 186 [MSTP207] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 7, CLK_ENABLE_ON_INIT), 187 [MSTP205] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 5, 0), 188 [MSTP204] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 4, 0), 189 [MSTP203] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 3, 0), 190 [MSTP202] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 2, CLK_ENABLE_ON_INIT), 191 [MSTP201] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 1, CLK_ENABLE_ON_INIT), 192 [MSTP200] = MSTP(&div4_clks[DIV4_B], MSTPCR2, 0, 0), 193 }; 194 195 #define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk } 196 197 static struct clk_lookup lookups[] = { 198 /* main clocks */ 199 CLKDEV_CON_ID("rclk", &r_clk), 200 CLKDEV_CON_ID("extal", &extal_clk), 201 CLKDEV_CON_ID("dll_clk", &dll_clk), 202 CLKDEV_CON_ID("pll_clk", &pll_clk), 203 204 /* DIV4 clocks */ 205 CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]), 206 CLKDEV_CON_ID("umem_clk", &div4_clks[DIV4_U]), 207 CLKDEV_CON_ID("shyway_clk", &div4_clks[DIV4_SH]), 208 CLKDEV_CON_ID("bus_clk", &div4_clks[DIV4_B]), 209 CLKDEV_CON_ID("b3_clk", &div4_clks[DIV4_B3]), 210 CLKDEV_CON_ID("peripheral_clk", &div4_clks[DIV4_P]), 211 CLKDEV_CON_ID("siua_clk", &div4_clks[DIV4_SIUA]), 212 CLKDEV_CON_ID("siub_clk", &div4_clks[DIV4_SIUB]), 213 214 /* DIV6 clocks */ 215 CLKDEV_CON_ID("video_clk", &div6_clks[DIV6_V]), 216 217 /* MSTP32 clocks */ 218 CLKDEV_CON_ID("tlb0", &mstp_clks[MSTP031]), 219 CLKDEV_CON_ID("ic0", &mstp_clks[MSTP030]), 220 CLKDEV_CON_ID("oc0", &mstp_clks[MSTP029]), 221 CLKDEV_CON_ID("rsmem0", &mstp_clks[MSTP028]), 222 CLKDEV_CON_ID("xymem0", &mstp_clks[MSTP026]), 223 CLKDEV_CON_ID("intc3", &mstp_clks[MSTP023]), 224 CLKDEV_CON_ID("intc0", &mstp_clks[MSTP022]), 225 CLKDEV_CON_ID("dmac0", &mstp_clks[MSTP021]), 226 CLKDEV_CON_ID("sh0", &mstp_clks[MSTP020]), 227 CLKDEV_CON_ID("hudi0", &mstp_clks[MSTP019]), 228 CLKDEV_CON_ID("ubc0", &mstp_clks[MSTP017]), 229 CLKDEV_CON_ID("tmu_fck", &mstp_clks[MSTP015]), 230 CLKDEV_CON_ID("cmt_fck", &mstp_clks[MSTP014]), 231 CLKDEV_CON_ID("rwdt0", &mstp_clks[MSTP013]), 232 CLKDEV_CON_ID("mfi0", &mstp_clks[MSTP011]), 233 CLKDEV_CON_ID("flctl0", &mstp_clks[MSTP010]), 234 { 235 /* SCIF0 */ 236 .dev_id = "sh-sci.0", 237 .con_id = "sci_fck", 238 .clk = &mstp_clks[MSTP007], 239 }, { 240 /* SCIF1 */ 241 .dev_id = "sh-sci.1", 242 .con_id = "sci_fck", 243 .clk = &mstp_clks[MSTP006], 244 }, { 245 /* SCIF2 */ 246 .dev_id = "sh-sci.2", 247 .con_id = "sci_fck", 248 .clk = &mstp_clks[MSTP005], 249 }, 250 CLKDEV_CON_ID("msiof0", &mstp_clks[MSTP002]), 251 CLKDEV_CON_ID("sbr0", &mstp_clks[MSTP001]), 252 CLKDEV_CON_ID("i2c0", &mstp_clks[MSTP109]), 253 CLKDEV_CON_ID("icb0", &mstp_clks[MSTP227]), 254 CLKDEV_CON_ID("meram0", &mstp_clks[MSTP226]), 255 CLKDEV_CON_ID("dacy1", &mstp_clks[MSTP224]), 256 CLKDEV_CON_ID("dacy0", &mstp_clks[MSTP223]), 257 CLKDEV_CON_ID("tsif0", &mstp_clks[MSTP222]), 258 CLKDEV_CON_ID("sdhi0", &mstp_clks[MSTP218]), 259 CLKDEV_CON_ID("mmcif0", &mstp_clks[MSTP217]), 260 CLKDEV_CON_ID("usbf0", &mstp_clks[MSTP211]), 261 CLKDEV_CON_ID("veu1", &mstp_clks[MSTP207]), 262 CLKDEV_CON_ID("vou0", &mstp_clks[MSTP205]), 263 CLKDEV_CON_ID("beu0", &mstp_clks[MSTP204]), 264 CLKDEV_CON_ID("ceu0", &mstp_clks[MSTP203]), 265 CLKDEV_CON_ID("veu0", &mstp_clks[MSTP202]), 266 CLKDEV_CON_ID("vpu0", &mstp_clks[MSTP201]), 267 CLKDEV_CON_ID("lcdc0", &mstp_clks[MSTP200]), 268 }; 269 270 int __init arch_clk_init(void) 271 { 272 int k, ret = 0; 273 274 /* autodetect extal or dll configuration */ 275 if (__raw_readl(PLLCR) & 0x1000) 276 pll_clk.parent = &dll_clk; 277 else 278 pll_clk.parent = &extal_clk; 279 280 for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++) 281 ret = clk_register(main_clks[k]); 282 283 clkdev_add_table(lookups, ARRAY_SIZE(lookups)); 284 285 if (!ret) 286 ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table); 287 288 if (!ret) 289 ret = sh_clk_div6_register(div6_clks, DIV6_NR); 290 291 if (!ret) 292 ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR); 293 294 return ret; 295 } 296