1 /* 2 * arch/sh/kernel/cpu/sh4a/clock-sh7786.c 3 * 4 * SH7786 support for the clock framework 5 * 6 * Copyright (C) 2010 Paul Mundt 7 * 8 * This file is subject to the terms and conditions of the GNU General Public 9 * License. See the file "COPYING" in the main directory of this archive 10 * for more details. 11 */ 12 #include <linux/init.h> 13 #include <linux/kernel.h> 14 #include <linux/clk.h> 15 #include <linux/io.h> 16 #include <asm/clkdev.h> 17 #include <asm/clock.h> 18 #include <asm/freq.h> 19 20 /* 21 * Default rate for the root input clock, reset this with clk_set_rate() 22 * from the platform code. 23 */ 24 static struct clk extal_clk = { 25 .rate = 33333333, 26 }; 27 28 static unsigned long pll_recalc(struct clk *clk) 29 { 30 int multiplier; 31 32 /* 33 * Clock modes 0, 1, and 2 use an x64 multiplier against PLL1, 34 * while modes 3, 4, and 5 use an x32. 35 */ 36 multiplier = (sh_mv.mv_mode_pins() & 0xf) < 3 ? 64 : 32; 37 38 return clk->parent->rate * multiplier; 39 } 40 41 static struct 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 *clks[] = { 52 &extal_clk, 53 &pll_clk, 54 }; 55 56 static unsigned int div2[] = { 1, 2, 4, 6, 8, 12, 16, 18, 57 24, 32, 36, 48 }; 58 59 static struct clk_div_mult_table div4_div_mult_table = { 60 .divisors = div2, 61 .nr_divisors = ARRAY_SIZE(div2), 62 }; 63 64 static struct clk_div4_table div4_table = { 65 .div_mult_table = &div4_div_mult_table, 66 }; 67 68 enum { DIV4_I, DIV4_SH, DIV4_B, DIV4_DDR, DIV4_DU, DIV4_P, DIV4_NR }; 69 70 #define DIV4(_bit, _mask, _flags) \ 71 SH_CLK_DIV4(&pll_clk, FRQMR1, _bit, _mask, _flags) 72 73 struct clk div4_clks[DIV4_NR] = { 74 [DIV4_P] = DIV4(0, 0x0b40, 0), 75 [DIV4_DU] = DIV4(4, 0x0010, 0), 76 [DIV4_DDR] = DIV4(12, 0x0002, CLK_ENABLE_ON_INIT), 77 [DIV4_B] = DIV4(16, 0x0360, CLK_ENABLE_ON_INIT), 78 [DIV4_SH] = DIV4(20, 0x0002, CLK_ENABLE_ON_INIT), 79 [DIV4_I] = DIV4(28, 0x0006, CLK_ENABLE_ON_INIT), 80 }; 81 82 #define MSTPCR0 0xffc40030 83 #define MSTPCR1 0xffc40034 84 85 enum { MSTP029, MSTP028, MSTP027, MSTP026, MSTP025, MSTP024, 86 MSTP023, MSTP022, MSTP021, MSTP020, MSTP017, MSTP016, 87 MSTP015, MSTP014, MSTP011, MSTP010, MSTP009, MSTP008, 88 MSTP005, MSTP004, MSTP002, 89 MSTP112, MSTP110, MSTP109, MSTP108, 90 MSTP105, MSTP104, MSTP103, MSTP102, 91 MSTP_NR }; 92 93 static struct clk mstp_clks[MSTP_NR] = { 94 /* MSTPCR0 */ 95 [MSTP029] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 29, 0), 96 [MSTP028] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 28, 0), 97 [MSTP027] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 27, 0), 98 [MSTP026] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 26, 0), 99 [MSTP025] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 25, 0), 100 [MSTP024] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 24, 0), 101 [MSTP023] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 23, 0), 102 [MSTP022] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 22, 0), 103 [MSTP021] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 21, 0), 104 [MSTP020] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 20, 0), 105 [MSTP017] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 17, 0), 106 [MSTP016] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 16, 0), 107 [MSTP015] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 15, 0), 108 [MSTP014] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 14, 0), 109 [MSTP011] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 11, 0), 110 [MSTP010] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 10, 0), 111 [MSTP009] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 9, 0), 112 [MSTP008] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 8, 0), 113 [MSTP005] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 5, 0), 114 [MSTP004] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 4, 0), 115 [MSTP002] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 2, 0), 116 117 /* MSTPCR1 */ 118 [MSTP112] = SH_CLK_MSTP32(NULL, MSTPCR1, 12, 0), 119 [MSTP110] = SH_CLK_MSTP32(NULL, MSTPCR1, 10, 0), 120 [MSTP109] = SH_CLK_MSTP32(NULL, MSTPCR1, 9, 0), 121 [MSTP108] = SH_CLK_MSTP32(NULL, MSTPCR1, 8, 0), 122 [MSTP105] = SH_CLK_MSTP32(NULL, MSTPCR1, 5, 0), 123 [MSTP104] = SH_CLK_MSTP32(NULL, MSTPCR1, 4, 0), 124 [MSTP103] = SH_CLK_MSTP32(NULL, MSTPCR1, 3, 0), 125 [MSTP102] = SH_CLK_MSTP32(NULL, MSTPCR1, 2, 0), 126 }; 127 128 #define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk } 129 130 static struct clk_lookup lookups[] = { 131 /* main clocks */ 132 CLKDEV_CON_ID("extal", &extal_clk), 133 CLKDEV_CON_ID("pll_clk", &pll_clk), 134 135 /* DIV4 clocks */ 136 CLKDEV_CON_ID("peripheral_clk", &div4_clks[DIV4_P]), 137 CLKDEV_CON_ID("du_clk", &div4_clks[DIV4_DU]), 138 CLKDEV_CON_ID("ddr_clk", &div4_clks[DIV4_DDR]), 139 CLKDEV_CON_ID("bus_clk", &div4_clks[DIV4_B]), 140 CLKDEV_CON_ID("shyway_clk", &div4_clks[DIV4_SH]), 141 CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]), 142 143 /* MSTP32 clocks */ 144 { 145 /* SCIF5 */ 146 .dev_id = "sh-sci.5", 147 .con_id = "sci_fck", 148 .clk = &mstp_clks[MSTP029], 149 }, { 150 /* SCIF4 */ 151 .dev_id = "sh-sci.4", 152 .con_id = "sci_fck", 153 .clk = &mstp_clks[MSTP028], 154 }, { 155 /* SCIF3 */ 156 .dev_id = "sh-sci.3", 157 .con_id = "sci_fck", 158 .clk = &mstp_clks[MSTP027], 159 }, { 160 /* SCIF2 */ 161 .dev_id = "sh-sci.2", 162 .con_id = "sci_fck", 163 .clk = &mstp_clks[MSTP026], 164 }, { 165 /* SCIF1 */ 166 .dev_id = "sh-sci.1", 167 .con_id = "sci_fck", 168 .clk = &mstp_clks[MSTP025], 169 }, { 170 /* SCIF0 */ 171 .dev_id = "sh-sci.0", 172 .con_id = "sci_fck", 173 .clk = &mstp_clks[MSTP024], 174 }, 175 CLKDEV_CON_ID("ssi3_fck", &mstp_clks[MSTP023]), 176 CLKDEV_CON_ID("ssi2_fck", &mstp_clks[MSTP022]), 177 CLKDEV_CON_ID("ssi1_fck", &mstp_clks[MSTP021]), 178 CLKDEV_CON_ID("ssi0_fck", &mstp_clks[MSTP020]), 179 CLKDEV_CON_ID("hac1_fck", &mstp_clks[MSTP017]), 180 CLKDEV_CON_ID("hac0_fck", &mstp_clks[MSTP016]), 181 CLKDEV_CON_ID("i2c1_fck", &mstp_clks[MSTP015]), 182 CLKDEV_CON_ID("i2c0_fck", &mstp_clks[MSTP014]), 183 { 184 /* TMU0 */ 185 .dev_id = "sh_tmu.0", 186 .con_id = "tmu_fck", 187 .clk = &mstp_clks[MSTP008], 188 }, { 189 /* TMU1 */ 190 .dev_id = "sh_tmu.1", 191 .con_id = "tmu_fck", 192 .clk = &mstp_clks[MSTP008], 193 }, { 194 /* TMU2 */ 195 .dev_id = "sh_tmu.2", 196 .con_id = "tmu_fck", 197 .clk = &mstp_clks[MSTP008], 198 }, { 199 /* TMU3 */ 200 .dev_id = "sh_tmu.3", 201 .con_id = "tmu_fck", 202 .clk = &mstp_clks[MSTP009], 203 }, { 204 /* TMU4 */ 205 .dev_id = "sh_tmu.4", 206 .con_id = "tmu_fck", 207 .clk = &mstp_clks[MSTP009], 208 }, { 209 /* TMU5 */ 210 .dev_id = "sh_tmu.5", 211 .con_id = "tmu_fck", 212 .clk = &mstp_clks[MSTP009], 213 }, { 214 /* TMU6 */ 215 .dev_id = "sh_tmu.6", 216 .con_id = "tmu_fck", 217 .clk = &mstp_clks[MSTP010], 218 }, { 219 /* TMU7 */ 220 .dev_id = "sh_tmu.7", 221 .con_id = "tmu_fck", 222 .clk = &mstp_clks[MSTP010], 223 }, { 224 /* TMU8 */ 225 .dev_id = "sh_tmu.8", 226 .con_id = "tmu_fck", 227 .clk = &mstp_clks[MSTP010], 228 }, { 229 /* TMU9 */ 230 .dev_id = "sh_tmu.9", 231 .con_id = "tmu_fck", 232 .clk = &mstp_clks[MSTP011], 233 }, { 234 /* TMU10 */ 235 .dev_id = "sh_tmu.10", 236 .con_id = "tmu_fck", 237 .clk = &mstp_clks[MSTP011], 238 }, { 239 /* TMU11 */ 240 .dev_id = "sh_tmu.11", 241 .con_id = "tmu_fck", 242 .clk = &mstp_clks[MSTP011], 243 }, 244 CLKDEV_CON_ID("sdif1_fck", &mstp_clks[MSTP005]), 245 CLKDEV_CON_ID("sdif0_fck", &mstp_clks[MSTP004]), 246 CLKDEV_CON_ID("hspi_fck", &mstp_clks[MSTP002]), 247 CLKDEV_CON_ID("usb_fck", &mstp_clks[MSTP112]), 248 CLKDEV_CON_ID("pcie2_fck", &mstp_clks[MSTP110]), 249 CLKDEV_CON_ID("pcie1_fck", &mstp_clks[MSTP109]), 250 CLKDEV_CON_ID("pcie0_fck", &mstp_clks[MSTP108]), 251 CLKDEV_CON_ID("dmac_11_6_fck", &mstp_clks[MSTP105]), 252 CLKDEV_CON_ID("dmac_5_0_fck", &mstp_clks[MSTP104]), 253 CLKDEV_CON_ID("du_fck", &mstp_clks[MSTP103]), 254 CLKDEV_CON_ID("ether_fck", &mstp_clks[MSTP102]), 255 }; 256 257 int __init arch_clk_init(void) 258 { 259 int i, ret = 0; 260 261 for (i = 0; i < ARRAY_SIZE(clks); i++) 262 ret |= clk_register(clks[i]); 263 for (i = 0; i < ARRAY_SIZE(lookups); i++) 264 clkdev_add(&lookups[i]); 265 266 if (!ret) 267 ret = sh_clk_div4_register(div4_clks, ARRAY_SIZE(div4_clks), 268 &div4_table); 269 if (!ret) 270 ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR); 271 272 return ret; 273 } 274