// SPDX-License-Identifier: GPL-2.0
/*
 * r8a774b1 Clock Pulse Generator / Module Standby and Software Reset
 *
 * Copyright (C) 2019 Renesas Electronics Corp.
 *
 * Based on r8a7796-cpg-mssr.c
 *
 * Copyright (C) 2016 Glider bvba
 */

#include <linux/device.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/soc/renesas/rcar-rst.h>

#include <dt-bindings/clock/r8a774b1-cpg-mssr.h>

#include "renesas-cpg-mssr.h"
#include "rcar-gen3-cpg.h"

enum clk_ids {
        /* Core Clock Outputs exported to DT */
        LAST_DT_CORE_CLK = R8A774B1_CLK_CANFD,

        /* External Input Clocks */
        CLK_EXTAL,
        CLK_EXTALR,

        /* Internal Core Clocks */
        CLK_MAIN,
        CLK_PLL0,
        CLK_PLL1,
        CLK_PLL3,
        CLK_PLL4,
        CLK_PLL1_DIV2,
        CLK_PLL1_DIV4,
        CLK_S0,
        CLK_S1,
        CLK_S2,
        CLK_S3,
        CLK_SDSRC,
        CLK_RPCSRC,
        CLK_RINT,

        /* Module Clocks */
        MOD_CLK_BASE
};

static const struct cpg_core_clk r8a774b1_core_clks[] __initconst = {
        /* External Clock Inputs */
        DEF_INPUT("extal",      CLK_EXTAL),
        DEF_INPUT("extalr",     CLK_EXTALR),

        /* Internal Core Clocks */
        DEF_BASE(".main",       CLK_MAIN, CLK_TYPE_GEN3_MAIN, CLK_EXTAL),
        DEF_BASE(".pll0",       CLK_PLL0, CLK_TYPE_GEN3_PLL0, CLK_MAIN),
        DEF_BASE(".pll1",       CLK_PLL1, CLK_TYPE_GEN3_PLL1, CLK_MAIN),
        DEF_BASE(".pll3",       CLK_PLL3, CLK_TYPE_GEN3_PLL3, CLK_MAIN),
        DEF_BASE(".pll4",       CLK_PLL4, CLK_TYPE_GEN3_PLL4, CLK_MAIN),

        DEF_FIXED(".pll1_div2", CLK_PLL1_DIV2,     CLK_PLL1,       2, 1),
        DEF_FIXED(".pll1_div4", CLK_PLL1_DIV4,     CLK_PLL1_DIV2,  2, 1),
        DEF_FIXED(".s0",        CLK_S0,            CLK_PLL1_DIV2,  2, 1),
        DEF_FIXED(".s1",        CLK_S1,            CLK_PLL1_DIV2,  3, 1),
        DEF_FIXED(".s2",        CLK_S2,            CLK_PLL1_DIV2,  4, 1),
        DEF_FIXED(".s3",        CLK_S3,            CLK_PLL1_DIV2,  6, 1),
        DEF_FIXED(".sdsrc",     CLK_SDSRC,         CLK_PLL1_DIV2,  2, 1),

        DEF_BASE(".rpcsrc",     CLK_RPCSRC, CLK_TYPE_GEN3_RPCSRC, CLK_PLL1),

        DEF_GEN3_OSC(".r",      CLK_RINT,          CLK_EXTAL,      32),

        /* Core Clock Outputs */
        DEF_GEN3_Z("z",         R8A774B1_CLK_Z,     CLK_TYPE_GEN3_Z,  CLK_PLL0, 2, 8),
        DEF_GEN3_Z("zg",        R8A774B1_CLK_ZG,    CLK_TYPE_GEN3_ZG, CLK_PLL4, 4, 24),
        DEF_FIXED("ztr",        R8A774B1_CLK_ZTR,   CLK_PLL1_DIV2,  6, 1),
        DEF_FIXED("ztrd2",      R8A774B1_CLK_ZTRD2, CLK_PLL1_DIV2, 12, 1),
        DEF_FIXED("zt",         R8A774B1_CLK_ZT,    CLK_PLL1_DIV2,  4, 1),
        DEF_FIXED("zx",         R8A774B1_CLK_ZX,    CLK_PLL1_DIV2,  2, 1),
        DEF_FIXED("s0d1",       R8A774B1_CLK_S0D1,  CLK_S0,         1, 1),
        DEF_FIXED("s0d2",       R8A774B1_CLK_S0D2,  CLK_S0,         2, 1),
        DEF_FIXED("s0d3",       R8A774B1_CLK_S0D3,  CLK_S0,         3, 1),
        DEF_FIXED("s0d4",       R8A774B1_CLK_S0D4,  CLK_S0,         4, 1),
        DEF_FIXED("s0d6",       R8A774B1_CLK_S0D6,  CLK_S0,         6, 1),
        DEF_FIXED("s0d8",       R8A774B1_CLK_S0D8,  CLK_S0,         8, 1),
        DEF_FIXED("s0d12",      R8A774B1_CLK_S0D12, CLK_S0,        12, 1),
        DEF_FIXED("s1d2",       R8A774B1_CLK_S1D2,  CLK_S1,         2, 1),
        DEF_FIXED("s1d4",       R8A774B1_CLK_S1D4,  CLK_S1,         4, 1),
        DEF_FIXED("s2d1",       R8A774B1_CLK_S2D1,  CLK_S2,         1, 1),
        DEF_FIXED("s2d2",       R8A774B1_CLK_S2D2,  CLK_S2,         2, 1),
        DEF_FIXED("s2d4",       R8A774B1_CLK_S2D4,  CLK_S2,         4, 1),
        DEF_FIXED("s3d1",       R8A774B1_CLK_S3D1,  CLK_S3,         1, 1),
        DEF_FIXED("s3d2",       R8A774B1_CLK_S3D2,  CLK_S3,         2, 1),
        DEF_FIXED("s3d4",       R8A774B1_CLK_S3D4,  CLK_S3,         4, 1),

        DEF_GEN3_SDH("sd0h",    R8A774B1_CLK_SD0H,  CLK_SDSRC,         0x074),
        DEF_GEN3_SDH("sd1h",    R8A774B1_CLK_SD1H,  CLK_SDSRC,         0x078),
        DEF_GEN3_SDH("sd2h",    R8A774B1_CLK_SD2H,  CLK_SDSRC,         0x268),
        DEF_GEN3_SDH("sd3h",    R8A774B1_CLK_SD3H,  CLK_SDSRC,         0x26c),
        DEF_GEN3_SD("sd0",      R8A774B1_CLK_SD0,   R8A774B1_CLK_SD0H, 0x074),
        DEF_GEN3_SD("sd1",      R8A774B1_CLK_SD1,   R8A774B1_CLK_SD1H, 0x078),
        DEF_GEN3_SD("sd2",      R8A774B1_CLK_SD2,   R8A774B1_CLK_SD2H, 0x268),
        DEF_GEN3_SD("sd3",      R8A774B1_CLK_SD3,   R8A774B1_CLK_SD3H, 0x26c),

        DEF_BASE("rpc",         R8A774B1_CLK_RPC,   CLK_TYPE_GEN3_RPC,   CLK_RPCSRC),
        DEF_BASE("rpcd2",       R8A774B1_CLK_RPCD2, CLK_TYPE_GEN3_RPCD2, R8A774B1_CLK_RPC),

        DEF_FIXED("cl",         R8A774B1_CLK_CL,    CLK_PLL1_DIV2, 48, 1),
        DEF_FIXED("cp",         R8A774B1_CLK_CP,    CLK_EXTAL,      2, 1),
        DEF_FIXED("cpex",       R8A774B1_CLK_CPEX,  CLK_EXTAL,      2, 1),

        DEF_DIV6P1("canfd",     R8A774B1_CLK_CANFD, CLK_PLL1_DIV4, 0x244),
        DEF_DIV6P1("csi0",      R8A774B1_CLK_CSI0,  CLK_PLL1_DIV4, 0x00c),
        DEF_DIV6P1("mso",       R8A774B1_CLK_MSO,   CLK_PLL1_DIV4, 0x014),
        DEF_DIV6P1("hdmi",      R8A774B1_CLK_HDMI,  CLK_PLL1_DIV4, 0x250),

        DEF_GEN3_OSC("osc",     R8A774B1_CLK_OSC,   CLK_EXTAL,     8),

        DEF_BASE("r",           R8A774B1_CLK_R,     CLK_TYPE_GEN3_R, CLK_RINT),
};

static const struct mssr_mod_clk r8a774b1_mod_clks[] __initconst = {
        DEF_MOD("3dge",                  112,   R8A774B1_CLK_ZG),
        DEF_MOD("tmu4",                  121,   R8A774B1_CLK_S0D6),
        DEF_MOD("tmu3",                  122,   R8A774B1_CLK_S3D2),
        DEF_MOD("tmu2",                  123,   R8A774B1_CLK_S3D2),
        DEF_MOD("tmu1",                  124,   R8A774B1_CLK_S3D2),
        DEF_MOD("tmu0",                  125,   R8A774B1_CLK_CP),
        DEF_MOD("fdp1-0",                119,   R8A774B1_CLK_S0D1),
        DEF_MOD("scif5",                 202,   R8A774B1_CLK_S3D4),
        DEF_MOD("scif4",                 203,   R8A774B1_CLK_S3D4),
        DEF_MOD("scif3",                 204,   R8A774B1_CLK_S3D4),
        DEF_MOD("scif1",                 206,   R8A774B1_CLK_S3D4),
        DEF_MOD("scif0",                 207,   R8A774B1_CLK_S3D4),
        DEF_MOD("msiof3",                208,   R8A774B1_CLK_MSO),
        DEF_MOD("msiof2",                209,   R8A774B1_CLK_MSO),
        DEF_MOD("msiof1",                210,   R8A774B1_CLK_MSO),
        DEF_MOD("msiof0",                211,   R8A774B1_CLK_MSO),
        DEF_MOD("sys-dmac2",             217,   R8A774B1_CLK_S3D1),
        DEF_MOD("sys-dmac1",             218,   R8A774B1_CLK_S3D1),
        DEF_MOD("sys-dmac0",             219,   R8A774B1_CLK_S0D3),
        DEF_MOD("cmt3",                  300,   R8A774B1_CLK_R),
        DEF_MOD("cmt2",                  301,   R8A774B1_CLK_R),
        DEF_MOD("cmt1",                  302,   R8A774B1_CLK_R),
        DEF_MOD("cmt0",                  303,   R8A774B1_CLK_R),
        DEF_MOD("tpu0",                  304,   R8A774B1_CLK_S3D4),
        DEF_MOD("scif2",                 310,   R8A774B1_CLK_S3D4),
        DEF_MOD("sdif3",                 311,   R8A774B1_CLK_SD3),
        DEF_MOD("sdif2",                 312,   R8A774B1_CLK_SD2),
        DEF_MOD("sdif1",                 313,   R8A774B1_CLK_SD1),
        DEF_MOD("sdif0",                 314,   R8A774B1_CLK_SD0),
        DEF_MOD("pcie1",                 318,   R8A774B1_CLK_S3D1),
        DEF_MOD("pcie0",                 319,   R8A774B1_CLK_S3D1),
        DEF_MOD("usb3-if0",              328,   R8A774B1_CLK_S3D1),
        DEF_MOD("usb-dmac0",             330,   R8A774B1_CLK_S3D1),
        DEF_MOD("usb-dmac1",             331,   R8A774B1_CLK_S3D1),
        DEF_MOD("rwdt",                  402,   R8A774B1_CLK_R),
        DEF_MOD("intc-ex",               407,   R8A774B1_CLK_CP),
        DEF_MOD("intc-ap",               408,   R8A774B1_CLK_S0D3),
        DEF_MOD("audmac1",               501,   R8A774B1_CLK_S1D2),
        DEF_MOD("audmac0",               502,   R8A774B1_CLK_S1D2),
        DEF_MOD("hscif4",                516,   R8A774B1_CLK_S3D1),
        DEF_MOD("hscif3",                517,   R8A774B1_CLK_S3D1),
        DEF_MOD("hscif2",                518,   R8A774B1_CLK_S3D1),
        DEF_MOD("hscif1",                519,   R8A774B1_CLK_S3D1),
        DEF_MOD("hscif0",                520,   R8A774B1_CLK_S3D1),
        DEF_MOD("thermal",               522,   R8A774B1_CLK_CP),
        DEF_MOD("pwm",                   523,   R8A774B1_CLK_S0D12),
        DEF_MOD("fcpvd1",                602,   R8A774B1_CLK_S0D2),
        DEF_MOD("fcpvd0",                603,   R8A774B1_CLK_S0D2),
        DEF_MOD("fcpvb0",                607,   R8A774B1_CLK_S0D1),
        DEF_MOD("fcpvi0",                611,   R8A774B1_CLK_S0D1),
        DEF_MOD("fcpf0",                 615,   R8A774B1_CLK_S0D1),
        DEF_MOD("fcpcs",                 619,   R8A774B1_CLK_S0D2),
        DEF_MOD("vspd1",                 622,   R8A774B1_CLK_S0D2),
        DEF_MOD("vspd0",                 623,   R8A774B1_CLK_S0D2),
        DEF_MOD("vspb",                  626,   R8A774B1_CLK_S0D1),
        DEF_MOD("vspi0",                 631,   R8A774B1_CLK_S0D1),
        DEF_MOD("ehci1",                 702,   R8A774B1_CLK_S3D2),
        DEF_MOD("ehci0",                 703,   R8A774B1_CLK_S3D2),
        DEF_MOD("hsusb",                 704,   R8A774B1_CLK_S3D2),
        DEF_MOD("csi20",                 714,   R8A774B1_CLK_CSI0),
        DEF_MOD("csi40",                 716,   R8A774B1_CLK_CSI0),
        DEF_MOD("du3",                   721,   R8A774B1_CLK_S2D1),
        DEF_MOD("du1",                   723,   R8A774B1_CLK_S2D1),
        DEF_MOD("du0",                   724,   R8A774B1_CLK_S2D1),
        DEF_MOD("lvds",                  727,   R8A774B1_CLK_S2D1),
        DEF_MOD("hdmi0",                 729,   R8A774B1_CLK_HDMI),
        DEF_MOD("vin7",                  804,   R8A774B1_CLK_S0D2),
        DEF_MOD("vin6",                  805,   R8A774B1_CLK_S0D2),
        DEF_MOD("vin5",                  806,   R8A774B1_CLK_S0D2),
        DEF_MOD("vin4",                  807,   R8A774B1_CLK_S0D2),
        DEF_MOD("vin3",                  808,   R8A774B1_CLK_S0D2),
        DEF_MOD("vin2",                  809,   R8A774B1_CLK_S0D2),
        DEF_MOD("vin1",                  810,   R8A774B1_CLK_S0D2),
        DEF_MOD("vin0",                  811,   R8A774B1_CLK_S0D2),
        DEF_MOD("etheravb",              812,   R8A774B1_CLK_S0D6),
        DEF_MOD("sata0",                 815,   R8A774B1_CLK_S3D2),
        DEF_MOD("gpio7",                 905,   R8A774B1_CLK_S3D4),
        DEF_MOD("gpio6",                 906,   R8A774B1_CLK_S3D4),
        DEF_MOD("gpio5",                 907,   R8A774B1_CLK_S3D4),
        DEF_MOD("gpio4",                 908,   R8A774B1_CLK_S3D4),
        DEF_MOD("gpio3",                 909,   R8A774B1_CLK_S3D4),
        DEF_MOD("gpio2",                 910,   R8A774B1_CLK_S3D4),
        DEF_MOD("gpio1",                 911,   R8A774B1_CLK_S3D4),
        DEF_MOD("gpio0",                 912,   R8A774B1_CLK_S3D4),
        DEF_MOD("can-fd",                914,   R8A774B1_CLK_S3D2),
        DEF_MOD("can-if1",               915,   R8A774B1_CLK_S3D4),
        DEF_MOD("can-if0",               916,   R8A774B1_CLK_S3D4),
        DEF_MOD("rpc-if",                917,   R8A774B1_CLK_RPCD2),
        DEF_MOD("i2c6",                  918,   R8A774B1_CLK_S0D6),
        DEF_MOD("i2c5",                  919,   R8A774B1_CLK_S0D6),
        DEF_MOD("adg",                   922,   R8A774B1_CLK_S0D4),
        DEF_MOD("iic-pmic",              926,   R8A774B1_CLK_CP),
        DEF_MOD("i2c4",                  927,   R8A774B1_CLK_S0D6),
        DEF_MOD("i2c3",                  928,   R8A774B1_CLK_S0D6),
        DEF_MOD("i2c2",                  929,   R8A774B1_CLK_S3D2),
        DEF_MOD("i2c1",                  930,   R8A774B1_CLK_S3D2),
        DEF_MOD("i2c0",                  931,   R8A774B1_CLK_S3D2),
        DEF_MOD("ssi-all",              1005,   R8A774B1_CLK_S3D4),
        DEF_MOD("ssi9",                 1006,   MOD_CLK_ID(1005)),
        DEF_MOD("ssi8",                 1007,   MOD_CLK_ID(1005)),
        DEF_MOD("ssi7",                 1008,   MOD_CLK_ID(1005)),
        DEF_MOD("ssi6",                 1009,   MOD_CLK_ID(1005)),
        DEF_MOD("ssi5",                 1010,   MOD_CLK_ID(1005)),
        DEF_MOD("ssi4",                 1011,   MOD_CLK_ID(1005)),
        DEF_MOD("ssi3",                 1012,   MOD_CLK_ID(1005)),
        DEF_MOD("ssi2",                 1013,   MOD_CLK_ID(1005)),
        DEF_MOD("ssi1",                 1014,   MOD_CLK_ID(1005)),
        DEF_MOD("ssi0",                 1015,   MOD_CLK_ID(1005)),
        DEF_MOD("scu-all",              1017,   R8A774B1_CLK_S3D4),
        DEF_MOD("scu-dvc1",             1018,   MOD_CLK_ID(1017)),
        DEF_MOD("scu-dvc0",             1019,   MOD_CLK_ID(1017)),
        DEF_MOD("scu-ctu1-mix1",        1020,   MOD_CLK_ID(1017)),
        DEF_MOD("scu-ctu0-mix0",        1021,   MOD_CLK_ID(1017)),
        DEF_MOD("scu-src9",             1022,   MOD_CLK_ID(1017)),
        DEF_MOD("scu-src8",             1023,   MOD_CLK_ID(1017)),
        DEF_MOD("scu-src7",             1024,   MOD_CLK_ID(1017)),
        DEF_MOD("scu-src6",             1025,   MOD_CLK_ID(1017)),
        DEF_MOD("scu-src5",             1026,   MOD_CLK_ID(1017)),
        DEF_MOD("scu-src4",             1027,   MOD_CLK_ID(1017)),
        DEF_MOD("scu-src3",             1028,   MOD_CLK_ID(1017)),
        DEF_MOD("scu-src2",             1029,   MOD_CLK_ID(1017)),
        DEF_MOD("scu-src1",             1030,   MOD_CLK_ID(1017)),
        DEF_MOD("scu-src0",             1031,   MOD_CLK_ID(1017)),
};

static const unsigned int r8a774b1_crit_mod_clks[] __initconst = {
        MOD_CLK_ID(402),        /* RWDT */
        MOD_CLK_ID(408),        /* INTC-AP (GIC) */
};

/*
 * CPG Clock Data
 */

/*
 *   MD         EXTAL           PLL0    PLL1    PLL3    PLL4    OSC
 * 14 13 19 17  (MHz)
 *-----------------------------------------------------------------
 * 0  0  0  0   16.66 x 1       x180    x192    x192    x144    /16
 * 0  0  0  1   16.66 x 1       x180    x192    x128    x144    /16
 * 0  0  1  0   Prohibited setting
 * 0  0  1  1   16.66 x 1       x180    x192    x192    x144    /16
 * 0  1  0  0   20    x 1       x150    x160    x160    x120    /19
 * 0  1  0  1   20    x 1       x150    x160    x106    x120    /19
 * 0  1  1  0   Prohibited setting
 * 0  1  1  1   20    x 1       x150    x160    x160    x120    /19
 * 1  0  0  0   25    x 1       x120    x128    x128    x96     /24
 * 1  0  0  1   25    x 1       x120    x128    x84     x96     /24
 * 1  0  1  0   Prohibited setting
 * 1  0  1  1   25    x 1       x120    x128    x128    x96     /24
 * 1  1  0  0   33.33 / 2       x180    x192    x192    x144    /32
 * 1  1  0  1   33.33 / 2       x180    x192    x128    x144    /32
 * 1  1  1  0   Prohibited setting
 * 1  1  1  1   33.33 / 2       x180    x192    x192    x144    /32
 */
#define CPG_PLL_CONFIG_INDEX(md)        ((((md) & BIT(14)) >> 11) | \
                                         (((md) & BIT(13)) >> 11) | \
                                         (((md) & BIT(19)) >> 18) | \
                                         (((md) & BIT(17)) >> 17))

static const struct rcar_gen3_cpg_pll_config cpg_pll_configs[16] __initconst = {
        /* EXTAL div    PLL1 mult/div   PLL3 mult/div   OSC prediv */
        { 1,            192,    1,      192,    1,      16,     },
        { 1,            192,    1,      128,    1,      16,     },
        { 0, /* Prohibited setting */                           },
        { 1,            192,    1,      192,    1,      16,     },
        { 1,            160,    1,      160,    1,      19,     },
        { 1,            160,    1,      106,    1,      19,     },
        { 0, /* Prohibited setting */                           },
        { 1,            160,    1,      160,    1,      19,     },
        { 1,            128,    1,      128,    1,      24,     },
        { 1,            128,    1,      84,     1,      24,     },
        { 0, /* Prohibited setting */                           },
        { 1,            128,    1,      128,    1,      24,     },
        { 2,            192,    1,      192,    1,      32,     },
        { 2,            192,    1,      128,    1,      32,     },
        { 0, /* Prohibited setting */                           },
        { 2,            192,    1,      192,    1,      32,     },
};

static int __init r8a774b1_cpg_mssr_init(struct device *dev)
{
        const struct rcar_gen3_cpg_pll_config *cpg_pll_config;
        u32 cpg_mode;
        int error;

        error = rcar_rst_read_mode_pins(&cpg_mode);
        if (error)
                return error;

        cpg_pll_config = &cpg_pll_configs[CPG_PLL_CONFIG_INDEX(cpg_mode)];
        if (!cpg_pll_config->extal_div) {
                dev_err(dev, "Prohibited setting (cpg_mode=0x%x)\n", cpg_mode);
                return -EINVAL;
        }

        return rcar_gen3_cpg_init(cpg_pll_config, CLK_EXTALR, cpg_mode);
}

const struct cpg_mssr_info r8a774b1_cpg_mssr_info __initconst = {
        /* Core Clocks */
        .core_clks = r8a774b1_core_clks,
        .num_core_clks = ARRAY_SIZE(r8a774b1_core_clks),
        .last_dt_core_clk = LAST_DT_CORE_CLK,
        .num_total_core_clks = MOD_CLK_BASE,

        /* Module Clocks */
        .mod_clks = r8a774b1_mod_clks,
        .num_mod_clks = ARRAY_SIZE(r8a774b1_mod_clks),
        .num_hw_mod_clks = 12 * 32,

        /* Critical Module Clocks */
        .crit_mod_clks = r8a774b1_crit_mod_clks,
        .num_crit_mod_clks = ARRAY_SIZE(r8a774b1_crit_mod_clks),

        /* Callbacks */
        .init = r8a774b1_cpg_mssr_init,
        .cpg_clk_register = rcar_gen3_cpg_clk_register,
};