drivers/clk/renesas/r8a77970-cpg-mssr.c

   1 /*
   2  * r8a77970 Clock Pulse Generator / Module Standby and Software Reset
   3  *
   4  * Copyright (C) 2017-2018 Cogent Embedded Inc.
   5  *
   6  * Based on r8a7795-cpg-mssr.c
   7  *
   8  * Copyright (C) 2015 Glider bvba
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; version 2 of the License.
  13  */
  14
  15 #include <linux/clk-provider.h>
  16 #include <linux/device.h>
  17 #include <linux/init.h>
  18 #include <linux/kernel.h>
  19 #include <linux/soc/renesas/rcar-rst.h>
  20
  21 #include <dt-bindings/clock/r8a77970-cpg-mssr.h>
  22
  23 #include "renesas-cpg-mssr.h"
  24 #include "rcar-gen3-cpg.h"
  25
  26 #define CPG_SD0CKCR             0x0074
  27
  28 enum r8a77970_clk_types {
  29         CLK_TYPE_R8A77970_SD0H = CLK_TYPE_GEN3_SOC_BASE,
  30         CLK_TYPE_R8A77970_SD0,
  31 };
  32
  33 enum clk_ids {
  34         /* Core Clock Outputs exported to DT */
  35         LAST_DT_CORE_CLK = R8A77970_CLK_OSC,
  36
  37         /* External Input Clocks */
  38         CLK_EXTAL,
  39         CLK_EXTALR,
  40
  41         /* Internal Core Clocks */
  42         CLK_MAIN,
  43         CLK_PLL0,
  44         CLK_PLL1,
  45         CLK_PLL3,
  46         CLK_PLL1_DIV2,
  47         CLK_PLL1_DIV4,
  48
  49         /* Module Clocks */
  50         MOD_CLK_BASE
  51 };
  52
  53 static spinlock_t cpg_lock;
  54
  55 static const struct clk_div_table cpg_sd0h_div_table[] = {
  56         {  0,  2 }, {  1,  3 }, {  2,  4 }, {  3,  6 },
  57         {  4,  8 }, {  5, 12 }, {  6, 16 }, {  7, 18 },
  58         {  8, 24 }, { 10, 36 }, { 11, 48 }, {  0,  0 },
  59 };
  60
  61 static const struct clk_div_table cpg_sd0_div_table[] = {
  62         {  4,  8 }, {  5, 12 }, {  6, 16 }, {  7, 18 },
  63         {  8, 24 }, { 10, 36 }, { 11, 48 }, { 12, 10 },
  64         {  0,  0 },
  65 };
  66
  67 static const struct cpg_core_clk r8a77970_core_clks[] __initconst = {
  68         /* External Clock Inputs */
  69         DEF_INPUT("extal",      CLK_EXTAL),
  70         DEF_INPUT("extalr",     CLK_EXTALR),
  71
  72         /* Internal Core Clocks */
  73         DEF_BASE(".main",       CLK_MAIN, CLK_TYPE_GEN3_MAIN, CLK_EXTAL),
  74         DEF_BASE(".pll0",       CLK_PLL0, CLK_TYPE_GEN3_PLL0, CLK_MAIN),
  75         DEF_BASE(".pll1",       CLK_PLL1, CLK_TYPE_GEN3_PLL1, CLK_MAIN),
  76         DEF_BASE(".pll3",       CLK_PLL3, CLK_TYPE_GEN3_PLL3, CLK_MAIN),
  77
  78         DEF_FIXED(".pll1_div2", CLK_PLL1_DIV2,  CLK_PLL1,       2, 1),
  79         DEF_FIXED(".pll1_div4", CLK_PLL1_DIV4,  CLK_PLL1_DIV2,  2, 1),
  80
  81         /* Core Clock Outputs */
  82         DEF_FIXED("ztr",        R8A77970_CLK_ZTR,   CLK_PLL1_DIV2,  6, 1),
  83         DEF_FIXED("ztrd2",      R8A77970_CLK_ZTRD2, CLK_PLL1_DIV2, 12, 1),
  84         DEF_FIXED("zt",         R8A77970_CLK_ZT,    CLK_PLL1_DIV2,  4, 1),
  85         DEF_FIXED("zx",         R8A77970_CLK_ZX,    CLK_PLL1_DIV2,  3, 1),
  86         DEF_FIXED("s1d1",       R8A77970_CLK_S1D1,  CLK_PLL1_DIV2,  4, 1),
  87         DEF_FIXED("s1d2",       R8A77970_CLK_S1D2,  CLK_PLL1_DIV2,  8, 1),
  88         DEF_FIXED("s1d4",       R8A77970_CLK_S1D4,  CLK_PLL1_DIV2, 16, 1),
  89         DEF_FIXED("s2d1",       R8A77970_CLK_S2D1,  CLK_PLL1_DIV2,  6, 1),
  90         DEF_FIXED("s2d2",       R8A77970_CLK_S2D2,  CLK_PLL1_DIV2, 12, 1),
  91         DEF_FIXED("s2d4",       R8A77970_CLK_S2D4,  CLK_PLL1_DIV2, 24, 1),
  92
  93         DEF_BASE("sd0h", R8A77970_CLK_SD0H, CLK_TYPE_R8A77970_SD0H,
  94                  CLK_PLL1_DIV2),
  95         DEF_BASE("sd0", R8A77970_CLK_SD0, CLK_TYPE_R8A77970_SD0, CLK_PLL1_DIV2),
  96
  97         DEF_FIXED("cl",         R8A77970_CLK_CL,    CLK_PLL1_DIV2, 48, 1),
  98         DEF_FIXED("cp",         R8A77970_CLK_CP,    CLK_EXTAL,      2, 1),
  99
 100         DEF_DIV6P1("canfd",     R8A77970_CLK_CANFD, CLK_PLL1_DIV4, 0x244),
 101         DEF_DIV6P1("mso",       R8A77970_CLK_MSO,   CLK_PLL1_DIV4, 0x014),
 102         DEF_DIV6P1("csi0",      R8A77970_CLK_CSI0,  CLK_PLL1_DIV4, 0x00c),
 103
 104         DEF_FIXED("osc",        R8A77970_CLK_OSC,   CLK_PLL1_DIV2, 12*1024, 1),
 105         DEF_FIXED("r",          R8A77970_CLK_R,     CLK_EXTALR,    1, 1),
 106 };
 107
 108 static const struct mssr_mod_clk r8a77970_mod_clks[] __initconst = {
 109         DEF_MOD("tmu4",                  121,   R8A77970_CLK_S2D2),
 110         DEF_MOD("tmu3",                  122,   R8A77970_CLK_S2D2),
 111         DEF_MOD("tmu2",                  123,   R8A77970_CLK_S2D2),
 112         DEF_MOD("tmu1",                  124,   R8A77970_CLK_S2D2),
 113         DEF_MOD("tmu0",                  125,   R8A77970_CLK_CP),
 114         DEF_MOD("ivcp1e",                127,   R8A77970_CLK_S2D1),
 115         DEF_MOD("scif4",                 203,   R8A77970_CLK_S2D4),
 116         DEF_MOD("scif3",                 204,   R8A77970_CLK_S2D4),
 117         DEF_MOD("scif1",                 206,   R8A77970_CLK_S2D4),
 118         DEF_MOD("scif0",                 207,   R8A77970_CLK_S2D4),
 119         DEF_MOD("msiof3",                208,   R8A77970_CLK_MSO),
 120         DEF_MOD("msiof2",                209,   R8A77970_CLK_MSO),
 121         DEF_MOD("msiof1",                210,   R8A77970_CLK_MSO),
 122         DEF_MOD("msiof0",                211,   R8A77970_CLK_MSO),
 123         DEF_MOD("mfis",                  213,   R8A77970_CLK_S2D2),
 124         DEF_MOD("sys-dmac2",             217,   R8A77970_CLK_S2D1),
 125         DEF_MOD("sys-dmac1",             218,   R8A77970_CLK_S2D1),
 126         DEF_MOD("cmt3",                  300,   R8A77970_CLK_R),
 127         DEF_MOD("cmt2",                  301,   R8A77970_CLK_R),
 128         DEF_MOD("cmt1",                  302,   R8A77970_CLK_R),
 129         DEF_MOD("cmt0",                  303,   R8A77970_CLK_R),
 130         DEF_MOD("tpu0",                  304,   R8A77970_CLK_S2D4),
 131         DEF_MOD("sd-if",                 314,   R8A77970_CLK_SD0),
 132         DEF_MOD("rwdt",                  402,   R8A77970_CLK_R),
 133         DEF_MOD("intc-ex",               407,   R8A77970_CLK_CP),
 134         DEF_MOD("intc-ap",               408,   R8A77970_CLK_S2D1),
 135         DEF_MOD("hscif3",                517,   R8A77970_CLK_S2D1),
 136         DEF_MOD("hscif2",                518,   R8A77970_CLK_S2D1),
 137         DEF_MOD("hscif1",                519,   R8A77970_CLK_S2D1),
 138         DEF_MOD("hscif0",                520,   R8A77970_CLK_S2D1),
 139         DEF_MOD("thermal",               522,   R8A77970_CLK_CP),
 140         DEF_MOD("pwm",                   523,   R8A77970_CLK_S2D4),
 141         DEF_MOD("fcpvd0",                603,   R8A77970_CLK_S2D1),
 142         DEF_MOD("vspd0",                 623,   R8A77970_CLK_S2D1),
 143         DEF_MOD("csi40",                 716,   R8A77970_CLK_CSI0),
 144         DEF_MOD("du0",                   724,   R8A77970_CLK_S2D1),
 145         DEF_MOD("lvds",                  727,   R8A77970_CLK_S2D1),
 146         DEF_MOD("vin3",                  808,   R8A77970_CLK_S2D1),
 147         DEF_MOD("vin2",                  809,   R8A77970_CLK_S2D1),
 148         DEF_MOD("vin1",                  810,   R8A77970_CLK_S2D1),
 149         DEF_MOD("vin0",                  811,   R8A77970_CLK_S2D1),
 150         DEF_MOD("etheravb",              812,   R8A77970_CLK_S2D2),
 151         DEF_MOD("gpio5",                 907,   R8A77970_CLK_CP),
 152         DEF_MOD("gpio4",                 908,   R8A77970_CLK_CP),
 153         DEF_MOD("gpio3",                 909,   R8A77970_CLK_CP),
 154         DEF_MOD("gpio2",                 910,   R8A77970_CLK_CP),
 155         DEF_MOD("gpio1",                 911,   R8A77970_CLK_CP),
 156         DEF_MOD("gpio0",                 912,   R8A77970_CLK_CP),
 157         DEF_MOD("can-fd",                914,   R8A77970_CLK_S2D2),
 158         DEF_MOD("i2c4",                  927,   R8A77970_CLK_S2D2),
 159         DEF_MOD("i2c3",                  928,   R8A77970_CLK_S2D2),
 160         DEF_MOD("i2c2",                  929,   R8A77970_CLK_S2D2),
 161         DEF_MOD("i2c1",                  930,   R8A77970_CLK_S2D2),
 162         DEF_MOD("i2c0",                  931,   R8A77970_CLK_S2D2),
 163 };
 164
 165 static const unsigned int r8a77970_crit_mod_clks[] __initconst = {
 166         MOD_CLK_ID(408),        /* INTC-AP (GIC) */
 167 };
 168
 169
 170 /*
 171  * CPG Clock Data
 172  */
 173
 174 /*
 175  *   MD         EXTAL           PLL0    PLL1    PLL3
 176  * 14 13 19     (MHz)
 177  *-------------------------------------------------
 178  * 0  0  0      16.66 x 1       x192    x192    x96
 179  * 0  0  1      16.66 x 1       x192    x192    x80
 180  * 0  1  0      20    x 1       x160    x160    x80
 181  * 0  1  1      20    x 1       x160    x160    x66
 182  * 1  0  0      27    / 2       x236    x236    x118
 183  * 1  0  1      27    / 2       x236    x236    x98
 184  * 1  1  0      33.33 / 2       x192    x192    x96
 185  * 1  1  1      33.33 / 2       x192    x192    x80
 186  */
 187 #define CPG_PLL_CONFIG_INDEX(md)        ((((md) & BIT(14)) >> 12) | \
 188                                          (((md) & BIT(13)) >> 12) | \
 189                                          (((md) & BIT(19)) >> 19))
 190
 191 static const struct rcar_gen3_cpg_pll_config cpg_pll_configs[8] __initconst = {
 192         /* EXTAL div    PLL1 mult/div   PLL3 mult/div */
 193         { 1,            192,    1,      96,     1,      },
 194         { 1,            192,    1,      80,     1,      },
 195         { 1,            160,    1,      80,     1,      },
 196         { 1,            160,    1,      66,     1,      },
 197         { 2,            236,    1,      118,    1,      },
 198         { 2,            236,    1,      98,     1,      },
 199         { 2,            192,    1,      96,     1,      },
 200         { 2,            192,    1,      80,     1,      },
 201 };
 202
 203 static int __init r8a77970_cpg_mssr_init(struct device *dev)
 204 {
 205         const struct rcar_gen3_cpg_pll_config *cpg_pll_config;
 206         u32 cpg_mode;
 207         int error;
 208
 209         error = rcar_rst_read_mode_pins(&cpg_mode);
 210         if (error)
 211                 return error;
 212
 213         spin_lock_init(&cpg_lock);
 214
 215         cpg_pll_config = &cpg_pll_configs[CPG_PLL_CONFIG_INDEX(cpg_mode)];
 216
 217         return rcar_gen3_cpg_init(cpg_pll_config, CLK_EXTALR, cpg_mode);
 218 }
 219
 220 static struct clk * __init r8a77970_cpg_clk_register(struct device *dev,
 221         const struct cpg_core_clk *core, const struct cpg_mssr_info *info,
 222         struct clk **clks, void __iomem *base,
 223         struct raw_notifier_head *notifiers)
 224 {
 225         const struct clk_div_table *table;
 226         const struct clk *parent;
 227         unsigned int shift;
 228
 229         switch (core->type) {
 230         case CLK_TYPE_R8A77970_SD0H:
 231                 table = cpg_sd0h_div_table;
 232                 shift = 8;
 233                 break;
 234         case CLK_TYPE_R8A77970_SD0:
 235                 table = cpg_sd0_div_table;
 236                 shift = 4;
 237                 break;
 238         default:
 239                 return rcar_gen3_cpg_clk_register(dev, core, info, clks, base,
 240                                                   notifiers);
 241         }
 242
 243         parent = clks[core->parent];
 244         if (IS_ERR(parent))
 245                 return ERR_CAST(parent);
 246
 247         return clk_register_divider_table(NULL, core->name,
 248                                           __clk_get_name(parent), 0,
 249                                           base + CPG_SD0CKCR,
 250                                           shift, 4, 0, table, &cpg_lock);
 251 }
 252
 253 const struct cpg_mssr_info r8a77970_cpg_mssr_info __initconst = {
 254         /* Core Clocks */
 255         .core_clks = r8a77970_core_clks,
 256         .num_core_clks = ARRAY_SIZE(r8a77970_core_clks),
 257         .last_dt_core_clk = LAST_DT_CORE_CLK,
 258         .num_total_core_clks = MOD_CLK_BASE,
 259
 260         /* Module Clocks */
 261         .mod_clks = r8a77970_mod_clks,
 262         .num_mod_clks = ARRAY_SIZE(r8a77970_mod_clks),
 263         .num_hw_mod_clks = 12 * 32,
 264
 265         /* Critical Module Clocks */
 266         .crit_mod_clks = r8a77970_crit_mod_clks,
 267         .num_crit_mod_clks = ARRAY_SIZE(r8a77970_crit_mod_clks),
 268
 269         /* Callbacks */
 270         .init = r8a77970_cpg_mssr_init,
 271         .cpg_clk_register = r8a77970_cpg_clk_register,
 272 };