drivers/clk/renesas/r8a7796-cpg-mssr.c

   1 /*
   2  * r8a7796 Clock Pulse Generator / Module Standby and Software Reset
   3  *
   4  * Copyright (C) 2016 Glider bvba
   5  *
   6  * Based on r8a7795-cpg-mssr.c
   7  *
   8  * Copyright (C) 2015 Glider bvba
   9  * Copyright (C) 2015 Renesas Electronics Corp.
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; version 2 of the License.
  14  */
  15
  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/r8a7796-cpg-mssr.h>
  22
  23 #include "renesas-cpg-mssr.h"
  24 #include "rcar-gen3-cpg.h"
  25
  26 enum clk_ids {
  27         /* Core Clock Outputs exported to DT */
  28         LAST_DT_CORE_CLK = R8A7796_CLK_OSC,
  29
  30         /* External Input Clocks */
  31         CLK_EXTAL,
  32         CLK_EXTALR,
  33
  34         /* Internal Core Clocks */
  35         CLK_MAIN,
  36         CLK_PLL0,
  37         CLK_PLL1,
  38         CLK_PLL2,
  39         CLK_PLL3,
  40         CLK_PLL4,
  41         CLK_PLL1_DIV2,
  42         CLK_PLL1_DIV4,
  43         CLK_S0,
  44         CLK_S1,
  45         CLK_S2,
  46         CLK_S3,
  47         CLK_SDSRC,
  48         CLK_SSPSRC,
  49         CLK_RINT,
  50
  51         /* Module Clocks */
  52         MOD_CLK_BASE
  53 };
  54
  55 static const struct cpg_core_clk r8a7796_core_clks[] __initconst = {
  56         /* External Clock Inputs */
  57         DEF_INPUT("extal",      CLK_EXTAL),
  58         DEF_INPUT("extalr",     CLK_EXTALR),
  59
  60         /* Internal Core Clocks */
  61         DEF_BASE(".main",       CLK_MAIN, CLK_TYPE_GEN3_MAIN, CLK_EXTAL),
  62         DEF_BASE(".pll0",       CLK_PLL0, CLK_TYPE_GEN3_PLL0, CLK_MAIN),
  63         DEF_BASE(".pll1",       CLK_PLL1, CLK_TYPE_GEN3_PLL1, CLK_MAIN),
  64         DEF_BASE(".pll2",       CLK_PLL2, CLK_TYPE_GEN3_PLL2, CLK_MAIN),
  65         DEF_BASE(".pll3",       CLK_PLL3, CLK_TYPE_GEN3_PLL3, CLK_MAIN),
  66         DEF_BASE(".pll4",       CLK_PLL4, CLK_TYPE_GEN3_PLL4, CLK_MAIN),
  67
  68         DEF_FIXED(".pll1_div2", CLK_PLL1_DIV2,     CLK_PLL1,       2, 1),
  69         DEF_FIXED(".pll1_div4", CLK_PLL1_DIV4,     CLK_PLL1_DIV2,  2, 1),
  70         DEF_FIXED(".s0",        CLK_S0,            CLK_PLL1_DIV2,  2, 1),
  71         DEF_FIXED(".s1",        CLK_S1,            CLK_PLL1_DIV2,  3, 1),
  72         DEF_FIXED(".s2",        CLK_S2,            CLK_PLL1_DIV2,  4, 1),
  73         DEF_FIXED(".s3",        CLK_S3,            CLK_PLL1_DIV2,  6, 1),
  74         DEF_FIXED(".sdsrc",     CLK_SDSRC,         CLK_PLL1_DIV2,  2, 1),
  75
  76         /* Core Clock Outputs */
  77         DEF_FIXED("ztr",        R8A7796_CLK_ZTR,   CLK_PLL1_DIV2,  6, 1),
  78         DEF_FIXED("ztrd2",      R8A7796_CLK_ZTRD2, CLK_PLL1_DIV2, 12, 1),
  79         DEF_FIXED("zt",         R8A7796_CLK_ZT,    CLK_PLL1_DIV2,  4, 1),
  80         DEF_FIXED("zx",         R8A7796_CLK_ZX,    CLK_PLL1_DIV2,  2, 1),
  81         DEF_FIXED("s0d1",       R8A7796_CLK_S0D1,  CLK_S0,         1, 1),
  82         DEF_FIXED("s0d2",       R8A7796_CLK_S0D2,  CLK_S0,         2, 1),
  83         DEF_FIXED("s0d3",       R8A7796_CLK_S0D3,  CLK_S0,         3, 1),
  84         DEF_FIXED("s0d4",       R8A7796_CLK_S0D4,  CLK_S0,         4, 1),
  85         DEF_FIXED("s0d6",       R8A7796_CLK_S0D6,  CLK_S0,         6, 1),
  86         DEF_FIXED("s0d8",       R8A7796_CLK_S0D8,  CLK_S0,         8, 1),
  87         DEF_FIXED("s0d12",      R8A7796_CLK_S0D12, CLK_S0,        12, 1),
  88         DEF_FIXED("s1d1",       R8A7796_CLK_S1D1,  CLK_S1,         1, 1),
  89         DEF_FIXED("s1d2",       R8A7796_CLK_S1D2,  CLK_S1,         2, 1),
  90         DEF_FIXED("s1d4",       R8A7796_CLK_S1D4,  CLK_S1,         4, 1),
  91         DEF_FIXED("s2d1",       R8A7796_CLK_S2D1,  CLK_S2,         1, 1),
  92         DEF_FIXED("s2d2",       R8A7796_CLK_S2D2,  CLK_S2,         2, 1),
  93         DEF_FIXED("s2d4",       R8A7796_CLK_S2D4,  CLK_S2,         4, 1),
  94         DEF_FIXED("s3d1",       R8A7796_CLK_S3D1,  CLK_S3,         1, 1),
  95         DEF_FIXED("s3d2",       R8A7796_CLK_S3D2,  CLK_S3,         2, 1),
  96         DEF_FIXED("s3d4",       R8A7796_CLK_S3D4,  CLK_S3,         4, 1),
  97
  98         DEF_GEN3_SD("sd0",      R8A7796_CLK_SD0,   CLK_SDSRC,     0x074),
  99         DEF_GEN3_SD("sd1",      R8A7796_CLK_SD1,   CLK_SDSRC,     0x078),
 100         DEF_GEN3_SD("sd2",      R8A7796_CLK_SD2,   CLK_SDSRC,     0x268),
 101         DEF_GEN3_SD("sd3",      R8A7796_CLK_SD3,   CLK_SDSRC,     0x26c),
 102
 103         DEF_FIXED("cl",         R8A7796_CLK_CL,    CLK_PLL1_DIV2, 48, 1),
 104         DEF_FIXED("cp",         R8A7796_CLK_CP,    CLK_EXTAL,      2, 1),
 105
 106         DEF_DIV6P1("canfd",     R8A7796_CLK_CANFD, CLK_PLL1_DIV4, 0x244),
 107         DEF_DIV6P1("csi0",      R8A7796_CLK_CSI0,  CLK_PLL1_DIV4, 0x00c),
 108         DEF_DIV6P1("mso",       R8A7796_CLK_MSO,   CLK_PLL1_DIV4, 0x014),
 109         DEF_DIV6P1("hdmi",      R8A7796_CLK_HDMI,  CLK_PLL1_DIV4, 0x250),
 110
 111         DEF_DIV6_RO("osc",      R8A7796_CLK_OSC,   CLK_EXTAL, CPG_RCKCR,  8),
 112         DEF_DIV6_RO("r_int",    CLK_RINT,          CLK_EXTAL, CPG_RCKCR, 32),
 113
 114         DEF_BASE("r",           R8A7796_CLK_R,     CLK_TYPE_GEN3_R, CLK_RINT),
 115 };
 116
 117 static const struct mssr_mod_clk r8a7796_mod_clks[] __initconst = {
 118         DEF_MOD("scif5",                 202,   R8A7796_CLK_S3D4),
 119         DEF_MOD("scif4",                 203,   R8A7796_CLK_S3D4),
 120         DEF_MOD("scif3",                 204,   R8A7796_CLK_S3D4),
 121         DEF_MOD("scif1",                 206,   R8A7796_CLK_S3D4),
 122         DEF_MOD("scif0",                 207,   R8A7796_CLK_S3D4),
 123         DEF_MOD("msiof3",                208,   R8A7796_CLK_MSO),
 124         DEF_MOD("msiof2",                209,   R8A7796_CLK_MSO),
 125         DEF_MOD("msiof1",                210,   R8A7796_CLK_MSO),
 126         DEF_MOD("msiof0",                211,   R8A7796_CLK_MSO),
 127         DEF_MOD("sys-dmac2",             217,   R8A7796_CLK_S0D3),
 128         DEF_MOD("sys-dmac1",             218,   R8A7796_CLK_S0D3),
 129         DEF_MOD("sys-dmac0",             219,   R8A7796_CLK_S0D3),
 130         DEF_MOD("cmt3",                  300,   R8A7796_CLK_R),
 131         DEF_MOD("cmt2",                  301,   R8A7796_CLK_R),
 132         DEF_MOD("cmt1",                  302,   R8A7796_CLK_R),
 133         DEF_MOD("cmt0",                  303,   R8A7796_CLK_R),
 134         DEF_MOD("scif2",                 310,   R8A7796_CLK_S3D4),
 135         DEF_MOD("sdif3",                 311,   R8A7796_CLK_SD3),
 136         DEF_MOD("sdif2",                 312,   R8A7796_CLK_SD2),
 137         DEF_MOD("sdif1",                 313,   R8A7796_CLK_SD1),
 138         DEF_MOD("sdif0",                 314,   R8A7796_CLK_SD0),
 139         DEF_MOD("pcie1",                 318,   R8A7796_CLK_S3D1),
 140         DEF_MOD("pcie0",                 319,   R8A7796_CLK_S3D1),
 141         DEF_MOD("usb-dmac0",             330,   R8A7796_CLK_S3D1),
 142         DEF_MOD("usb-dmac1",             331,   R8A7796_CLK_S3D1),
 143         DEF_MOD("rwdt",                  402,   R8A7796_CLK_R),
 144         DEF_MOD("intc-ex",               407,   R8A7796_CLK_CP),
 145         DEF_MOD("intc-ap",               408,   R8A7796_CLK_S3D1),
 146         DEF_MOD("audmac1",               501,   R8A7796_CLK_S0D3),
 147         DEF_MOD("audmac0",               502,   R8A7796_CLK_S0D3),
 148         DEF_MOD("drif7",                 508,   R8A7796_CLK_S3D2),
 149         DEF_MOD("drif6",                 509,   R8A7796_CLK_S3D2),
 150         DEF_MOD("drif5",                 510,   R8A7796_CLK_S3D2),
 151         DEF_MOD("drif4",                 511,   R8A7796_CLK_S3D2),
 152         DEF_MOD("drif3",                 512,   R8A7796_CLK_S3D2),
 153         DEF_MOD("drif2",                 513,   R8A7796_CLK_S3D2),
 154         DEF_MOD("drif1",                 514,   R8A7796_CLK_S3D2),
 155         DEF_MOD("drif0",                 515,   R8A7796_CLK_S3D2),
 156         DEF_MOD("hscif4",                516,   R8A7796_CLK_S3D1),
 157         DEF_MOD("hscif3",                517,   R8A7796_CLK_S3D1),
 158         DEF_MOD("hscif2",                518,   R8A7796_CLK_S3D1),
 159         DEF_MOD("hscif1",                519,   R8A7796_CLK_S3D1),
 160         DEF_MOD("hscif0",                520,   R8A7796_CLK_S3D1),
 161         DEF_MOD("thermal",               522,   R8A7796_CLK_CP),
 162         DEF_MOD("pwm",                   523,   R8A7796_CLK_S0D12),
 163         DEF_MOD("fcpvd2",                601,   R8A7796_CLK_S0D2),
 164         DEF_MOD("fcpvd1",                602,   R8A7796_CLK_S0D2),
 165         DEF_MOD("fcpvd0",                603,   R8A7796_CLK_S0D2),
 166         DEF_MOD("fcpvb0",                607,   R8A7796_CLK_S0D1),
 167         DEF_MOD("fcpvi0",                611,   R8A7796_CLK_S0D1),
 168         DEF_MOD("fcpf0",                 615,   R8A7796_CLK_S0D1),
 169         DEF_MOD("fcpci0",                617,   R8A7796_CLK_S0D2),
 170         DEF_MOD("fcpcs",                 619,   R8A7796_CLK_S0D2),
 171         DEF_MOD("vspd2",                 621,   R8A7796_CLK_S0D2),
 172         DEF_MOD("vspd1",                 622,   R8A7796_CLK_S0D2),
 173         DEF_MOD("vspd0",                 623,   R8A7796_CLK_S0D2),
 174         DEF_MOD("vspb",                  626,   R8A7796_CLK_S0D1),
 175         DEF_MOD("vspi0",                 631,   R8A7796_CLK_S0D1),
 176         DEF_MOD("ehci1",                 702,   R8A7796_CLK_S3D4),
 177         DEF_MOD("ehci0",                 703,   R8A7796_CLK_S3D4),
 178         DEF_MOD("hsusb",                 704,   R8A7796_CLK_S3D4),
 179         DEF_MOD("csi20",                 714,   R8A7796_CLK_CSI0),
 180         DEF_MOD("csi40",                 716,   R8A7796_CLK_CSI0),
 181         DEF_MOD("du2",                   722,   R8A7796_CLK_S2D1),
 182         DEF_MOD("du1",                   723,   R8A7796_CLK_S2D1),
 183         DEF_MOD("du0",                   724,   R8A7796_CLK_S2D1),
 184         DEF_MOD("lvds",                  727,   R8A7796_CLK_S2D1),
 185         DEF_MOD("hdmi0",                 729,   R8A7796_CLK_HDMI),
 186         DEF_MOD("vin7",                  804,   R8A7796_CLK_S0D2),
 187         DEF_MOD("vin6",                  805,   R8A7796_CLK_S0D2),
 188         DEF_MOD("vin5",                  806,   R8A7796_CLK_S0D2),
 189         DEF_MOD("vin4",                  807,   R8A7796_CLK_S0D2),
 190         DEF_MOD("vin3",                  808,   R8A7796_CLK_S0D2),
 191         DEF_MOD("vin2",                  809,   R8A7796_CLK_S0D2),
 192         DEF_MOD("vin1",                  810,   R8A7796_CLK_S0D2),
 193         DEF_MOD("vin0",                  811,   R8A7796_CLK_S0D2),
 194         DEF_MOD("etheravb",              812,   R8A7796_CLK_S0D6),
 195         DEF_MOD("imr1",                  822,   R8A7796_CLK_S0D2),
 196         DEF_MOD("imr0",                  823,   R8A7796_CLK_S0D2),
 197         DEF_MOD("gpio7",                 905,   R8A7796_CLK_S3D4),
 198         DEF_MOD("gpio6",                 906,   R8A7796_CLK_S3D4),
 199         DEF_MOD("gpio5",                 907,   R8A7796_CLK_S3D4),
 200         DEF_MOD("gpio4",                 908,   R8A7796_CLK_S3D4),
 201         DEF_MOD("gpio3",                 909,   R8A7796_CLK_S3D4),
 202         DEF_MOD("gpio2",                 910,   R8A7796_CLK_S3D4),
 203         DEF_MOD("gpio1",                 911,   R8A7796_CLK_S3D4),
 204         DEF_MOD("gpio0",                 912,   R8A7796_CLK_S3D4),
 205         DEF_MOD("can-fd",                914,   R8A7796_CLK_S3D2),
 206         DEF_MOD("can-if1",               915,   R8A7796_CLK_S3D4),
 207         DEF_MOD("can-if0",               916,   R8A7796_CLK_S3D4),
 208         DEF_MOD("i2c6",                  918,   R8A7796_CLK_S0D6),
 209         DEF_MOD("i2c5",                  919,   R8A7796_CLK_S0D6),
 210         DEF_MOD("i2c-dvfs",              926,   R8A7796_CLK_CP),
 211         DEF_MOD("i2c4",                  927,   R8A7796_CLK_S0D6),
 212         DEF_MOD("i2c3",                  928,   R8A7796_CLK_S0D6),
 213         DEF_MOD("i2c2",                  929,   R8A7796_CLK_S3D2),
 214         DEF_MOD("i2c1",                  930,   R8A7796_CLK_S3D2),
 215         DEF_MOD("i2c0",                  931,   R8A7796_CLK_S3D2),
 216         DEF_MOD("ssi-all",              1005,   R8A7796_CLK_S3D4),
 217         DEF_MOD("ssi9",                 1006,   MOD_CLK_ID(1005)),
 218         DEF_MOD("ssi8",                 1007,   MOD_CLK_ID(1005)),
 219         DEF_MOD("ssi7",                 1008,   MOD_CLK_ID(1005)),
 220         DEF_MOD("ssi6",                 1009,   MOD_CLK_ID(1005)),
 221         DEF_MOD("ssi5",                 1010,   MOD_CLK_ID(1005)),
 222         DEF_MOD("ssi4",                 1011,   MOD_CLK_ID(1005)),
 223         DEF_MOD("ssi3",                 1012,   MOD_CLK_ID(1005)),
 224         DEF_MOD("ssi2",                 1013,   MOD_CLK_ID(1005)),
 225         DEF_MOD("ssi1",                 1014,   MOD_CLK_ID(1005)),
 226         DEF_MOD("ssi0",                 1015,   MOD_CLK_ID(1005)),
 227         DEF_MOD("scu-all",              1017,   R8A7796_CLK_S3D4),
 228         DEF_MOD("scu-dvc1",             1018,   MOD_CLK_ID(1017)),
 229         DEF_MOD("scu-dvc0",             1019,   MOD_CLK_ID(1017)),
 230         DEF_MOD("scu-ctu1-mix1",        1020,   MOD_CLK_ID(1017)),
 231         DEF_MOD("scu-ctu0-mix0",        1021,   MOD_CLK_ID(1017)),
 232         DEF_MOD("scu-src9",             1022,   MOD_CLK_ID(1017)),
 233         DEF_MOD("scu-src8",             1023,   MOD_CLK_ID(1017)),
 234         DEF_MOD("scu-src7",             1024,   MOD_CLK_ID(1017)),
 235         DEF_MOD("scu-src6",             1025,   MOD_CLK_ID(1017)),
 236         DEF_MOD("scu-src5",             1026,   MOD_CLK_ID(1017)),
 237         DEF_MOD("scu-src4",             1027,   MOD_CLK_ID(1017)),
 238         DEF_MOD("scu-src3",             1028,   MOD_CLK_ID(1017)),
 239         DEF_MOD("scu-src2",             1029,   MOD_CLK_ID(1017)),
 240         DEF_MOD("scu-src1",             1030,   MOD_CLK_ID(1017)),
 241         DEF_MOD("scu-src0",             1031,   MOD_CLK_ID(1017)),
 242 };
 243
 244 static const unsigned int r8a7796_crit_mod_clks[] __initconst = {
 245         MOD_CLK_ID(408),        /* INTC-AP (GIC) */
 246 };
 247
 248
 249 /*
 250  * CPG Clock Data
 251  */
 252
 253 /*
 254  *   MD         EXTAL           PLL0    PLL1    PLL2    PLL3    PLL4
 255  * 14 13 19 17  (MHz)
 256  *-------------------------------------------------------------------
 257  * 0  0  0  0   16.66 x 1       x180    x192    x144    x192    x144
 258  * 0  0  0  1   16.66 x 1       x180    x192    x144    x128    x144
 259  * 0  0  1  0   Prohibited setting
 260  * 0  0  1  1   16.66 x 1       x180    x192    x144    x192    x144
 261  * 0  1  0  0   20    x 1       x150    x160    x120    x160    x120
 262  * 0  1  0  1   20    x 1       x150    x160    x120    x106    x120
 263  * 0  1  1  0   Prohibited setting
 264  * 0  1  1  1   20    x 1       x150    x160    x120    x160    x120
 265  * 1  0  0  0   25    x 1       x120    x128    x96     x128    x96
 266  * 1  0  0  1   25    x 1       x120    x128    x96     x84     x96
 267  * 1  0  1  0   Prohibited setting
 268  * 1  0  1  1   25    x 1       x120    x128    x96     x128    x96
 269  * 1  1  0  0   33.33 / 2       x180    x192    x144    x192    x144
 270  * 1  1  0  1   33.33 / 2       x180    x192    x144    x128    x144
 271  * 1  1  1  0   Prohibited setting
 272  * 1  1  1  1   33.33 / 2       x180    x192    x144    x192    x144
 273  */
 274 #define CPG_PLL_CONFIG_INDEX(md)        ((((md) & BIT(14)) >> 11) | \
 275                                          (((md) & BIT(13)) >> 11) | \
 276                                          (((md) & BIT(19)) >> 18) | \
 277                                          (((md) & BIT(17)) >> 17))
 278
 279 static const struct rcar_gen3_cpg_pll_config cpg_pll_configs[16] __initconst = {
 280         /* EXTAL div    PLL1 mult       PLL3 mult */
 281         { 1,            192,            192,    },
 282         { 1,            192,            128,    },
 283         { 0, /* Prohibited setting */           },
 284         { 1,            192,            192,    },
 285         { 1,            160,            160,    },
 286         { 1,            160,            106,    },
 287         { 0, /* Prohibited setting */           },
 288         { 1,            160,            160,    },
 289         { 1,            128,            128,    },
 290         { 1,            128,            84,     },
 291         { 0, /* Prohibited setting */           },
 292         { 1,            128,            128,    },
 293         { 2,            192,            192,    },
 294         { 2,            192,            128,    },
 295         { 0, /* Prohibited setting */           },
 296         { 2,            192,            192,    },
 297 };
 298
 299 static int __init r8a7796_cpg_mssr_init(struct device *dev)
 300 {
 301         const struct rcar_gen3_cpg_pll_config *cpg_pll_config;
 302         u32 cpg_mode;
 303         int error;
 304
 305         error = rcar_rst_read_mode_pins(&cpg_mode);
 306         if (error)
 307                 return error;
 308
 309         cpg_pll_config = &cpg_pll_configs[CPG_PLL_CONFIG_INDEX(cpg_mode)];
 310         if (!cpg_pll_config->extal_div) {
 311                 dev_err(dev, "Prohibited setting (cpg_mode=0x%x)\n", cpg_mode);
 312                 return -EINVAL;
 313         }
 314
 315         return rcar_gen3_cpg_init(cpg_pll_config, CLK_EXTALR, cpg_mode);
 316 }
 317
 318 const struct cpg_mssr_info r8a7796_cpg_mssr_info __initconst = {
 319         /* Core Clocks */
 320         .core_clks = r8a7796_core_clks,
 321         .num_core_clks = ARRAY_SIZE(r8a7796_core_clks),
 322         .last_dt_core_clk = LAST_DT_CORE_CLK,
 323         .num_total_core_clks = MOD_CLK_BASE,
 324
 325         /* Module Clocks */
 326         .mod_clks = r8a7796_mod_clks,
 327         .num_mod_clks = ARRAY_SIZE(r8a7796_mod_clks),
 328         .num_hw_mod_clks = 12 * 32,
 329
 330         /* Critical Module Clocks */
 331         .crit_mod_clks = r8a7796_crit_mod_clks,
 332         .num_crit_mod_clks = ARRAY_SIZE(r8a7796_crit_mod_clks),
 333
 334         /* Callbacks */
 335         .init = r8a7796_cpg_mssr_init,
 336         .cpg_clk_register = rcar_gen3_cpg_clk_register,
 337 };