// SPDX-License-Identifier: GPL-2.0
/*
 * r8a77470 Clock Pulse Generator / Module Standby and Software Reset
 *
 * Copyright (C) 2018 Renesas Electronics Corp.
 */

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

#include <dt-bindings/clock/r8a77470-cpg-mssr.h>

#include "renesas-cpg-mssr.h"
#include "rcar-gen2-cpg.h"

enum clk_ids {
        /* Core Clock Outputs exported to DT */
        LAST_DT_CORE_CLK = R8A77470_CLK_OSC,

        /* External Input Clocks */
        CLK_EXTAL,
        CLK_USB_EXTAL,

        /* Internal Core Clocks */
        CLK_MAIN,
        CLK_PLL0,
        CLK_PLL1,
        CLK_PLL3,
        CLK_PLL1_DIV2,

        /* Module Clocks */
        MOD_CLK_BASE
};

static const struct cpg_core_clk r8a77470_core_clks[] __initconst = {
        /* External Clock Inputs */
        DEF_INPUT("extal",      CLK_EXTAL),
        DEF_INPUT("usb_extal",  CLK_USB_EXTAL),

        /* Internal Core Clocks */
        DEF_BASE(".main",       CLK_MAIN, CLK_TYPE_GEN2_MAIN, CLK_EXTAL),
        DEF_BASE(".pll0",       CLK_PLL0, CLK_TYPE_GEN2_PLL0, CLK_MAIN),
        DEF_BASE(".pll1",       CLK_PLL1, CLK_TYPE_GEN2_PLL1, CLK_MAIN),
        DEF_BASE(".pll3",       CLK_PLL3, CLK_TYPE_GEN2_PLL3, CLK_MAIN),

        DEF_FIXED(".pll1_div2", CLK_PLL1_DIV2, CLK_PLL1, 2, 1),

        /* Core Clock Outputs */
        DEF_BASE("sdh",  R8A77470_CLK_SDH,  CLK_TYPE_GEN2_SDH,  CLK_PLL1),
        DEF_BASE("sd0",  R8A77470_CLK_SD0,  CLK_TYPE_GEN2_SD0,  CLK_PLL1),
        DEF_BASE("sd1",  R8A77470_CLK_SD1,  CLK_TYPE_GEN2_SD1,  CLK_PLL1),
        DEF_BASE("qspi", R8A77470_CLK_QSPI, CLK_TYPE_GEN2_QSPI, CLK_PLL1_DIV2),
        DEF_BASE("rcan", R8A77470_CLK_RCAN, CLK_TYPE_GEN2_RCAN, CLK_USB_EXTAL),

        DEF_FIXED("z2",    R8A77470_CLK_Z2,     CLK_PLL0,           1, 1),
        DEF_FIXED("zx",    R8A77470_CLK_ZX,     CLK_PLL1,           3, 1),
        DEF_FIXED("zs",    R8A77470_CLK_ZS,     CLK_PLL1,           6, 1),
        DEF_FIXED("hp",    R8A77470_CLK_HP,     CLK_PLL1,          12, 1),
        DEF_FIXED("b",     R8A77470_CLK_B,      CLK_PLL1,          12, 1),
        DEF_FIXED("lb",    R8A77470_CLK_LB,     CLK_PLL1,          24, 1),
        DEF_FIXED("p",     R8A77470_CLK_P,      CLK_PLL1,          24, 1),
        DEF_FIXED("cl",    R8A77470_CLK_CL,     CLK_PLL1,          48, 1),
        DEF_FIXED("cp",    R8A77470_CLK_CP,     CLK_PLL1,          48, 1),
        DEF_FIXED("m2",    R8A77470_CLK_M2,     CLK_PLL1,           8, 1),
        DEF_FIXED("zb3",   R8A77470_CLK_ZB3,    CLK_PLL3,           4, 1),
        DEF_FIXED("mp",    R8A77470_CLK_MP,     CLK_PLL1_DIV2,     15, 1),
        DEF_FIXED("cpex",  R8A77470_CLK_CPEX,   CLK_EXTAL,          2, 1),
        DEF_FIXED("r",     R8A77470_CLK_R,      CLK_PLL1,       49152, 1),
        DEF_FIXED("osc",   R8A77470_CLK_OSC,    CLK_PLL1,       12288, 1),

        DEF_DIV6P1("sd2",  R8A77470_CLK_SD2,    CLK_PLL1_DIV2,  0x078),
};

static const struct mssr_mod_clk r8a77470_mod_clks[] __initconst = {
        DEF_MOD("msiof0",                  0,   R8A77470_CLK_MP),
        DEF_MOD("vcp0",                  101,   R8A77470_CLK_ZS),
        DEF_MOD("vpc0",                  103,   R8A77470_CLK_ZS),
        DEF_MOD("tmu1",                  111,   R8A77470_CLK_P),
        DEF_MOD("3dg",                   112,   R8A77470_CLK_ZS),
        DEF_MOD("2d-dmac",               115,   R8A77470_CLK_ZS),
        DEF_MOD("fdp1-0",                119,   R8A77470_CLK_ZS),
        DEF_MOD("tmu3",                  121,   R8A77470_CLK_P),
        DEF_MOD("tmu2",                  122,   R8A77470_CLK_P),
        DEF_MOD("cmt0",                  124,   R8A77470_CLK_R),
        DEF_MOD("vsp1du0",               128,   R8A77470_CLK_ZS),
        DEF_MOD("vsps",                  131,   R8A77470_CLK_ZS),
        DEF_MOD("msiof2",                205,   R8A77470_CLK_MP),
        DEF_MOD("msiof1",                208,   R8A77470_CLK_MP),
        DEF_MOD("sys-dmac1",             218,   R8A77470_CLK_ZS),
        DEF_MOD("sys-dmac0",             219,   R8A77470_CLK_ZS),
        DEF_MOD("sdhi2",                 312,   R8A77470_CLK_SD2),
        DEF_MOD("sdhi1",                 313,   R8A77470_CLK_SD1),
        DEF_MOD("sdhi0",                 314,   R8A77470_CLK_SD0),
        DEF_MOD("usbhs-dmac0-ch1",       326,   R8A77470_CLK_HP),
        DEF_MOD("usbhs-dmac1-ch1",       327,   R8A77470_CLK_HP),
        DEF_MOD("cmt1",                  329,   R8A77470_CLK_R),
        DEF_MOD("usbhs-dmac0-ch0",       330,   R8A77470_CLK_HP),
        DEF_MOD("usbhs-dmac1-ch0",       331,   R8A77470_CLK_HP),
        DEF_MOD("rwdt",                  402,   R8A77470_CLK_R),
        DEF_MOD("irqc",                  407,   R8A77470_CLK_CP),
        DEF_MOD("intc-sys",              408,   R8A77470_CLK_ZS),
        DEF_MOD("audio-dmac0",           502,   R8A77470_CLK_HP),
        DEF_MOD("pwm",                   523,   R8A77470_CLK_P),
        DEF_MOD("usb-ehci-0",            703,   R8A77470_CLK_MP),
        DEF_MOD("usbhs-0",               704,   R8A77470_CLK_HP),
        DEF_MOD("usb-ehci-1",            705,   R8A77470_CLK_MP),
        DEF_MOD("usbhs-1",               706,   R8A77470_CLK_HP),
        DEF_MOD("hscif2",                713,   R8A77470_CLK_ZS),
        DEF_MOD("scif5",                 714,   R8A77470_CLK_P),
        DEF_MOD("scif4",                 715,   R8A77470_CLK_P),
        DEF_MOD("hscif1",                716,   R8A77470_CLK_ZS),
        DEF_MOD("hscif0",                717,   R8A77470_CLK_ZS),
        DEF_MOD("scif3",                 718,   R8A77470_CLK_P),
        DEF_MOD("scif2",                 719,   R8A77470_CLK_P),
        DEF_MOD("scif1",                 720,   R8A77470_CLK_P),
        DEF_MOD("scif0",                 721,   R8A77470_CLK_P),
        DEF_MOD("du1",                   723,   R8A77470_CLK_ZX),
        DEF_MOD("du0",                   724,   R8A77470_CLK_ZX),
        DEF_MOD("ipmmu-sgx",             800,   R8A77470_CLK_ZX),
        DEF_MOD("etheravb",              812,   R8A77470_CLK_HP),
        DEF_MOD("ether",                 813,   R8A77470_CLK_P),
        DEF_MOD("gpio5",                 907,   R8A77470_CLK_CP),
        DEF_MOD("gpio4",                 908,   R8A77470_CLK_CP),
        DEF_MOD("gpio3",                 909,   R8A77470_CLK_CP),
        DEF_MOD("gpio2",                 910,   R8A77470_CLK_CP),
        DEF_MOD("gpio1",                 911,   R8A77470_CLK_CP),
        DEF_MOD("gpio0",                 912,   R8A77470_CLK_CP),
        DEF_MOD("can1",                  915,   R8A77470_CLK_P),
        DEF_MOD("can0",                  916,   R8A77470_CLK_P),
        DEF_MOD("qspi_mod-1",            917,   R8A77470_CLK_QSPI),
        DEF_MOD("qspi_mod-0",            918,   R8A77470_CLK_QSPI),
        DEF_MOD("i2c4",                  927,   R8A77470_CLK_HP),
        DEF_MOD("i2c3",                  928,   R8A77470_CLK_HP),
        DEF_MOD("i2c2",                  929,   R8A77470_CLK_HP),
        DEF_MOD("i2c1",                  930,   R8A77470_CLK_HP),
        DEF_MOD("i2c0",                  931,   R8A77470_CLK_HP),
        DEF_MOD("ssi-all",              1005,   R8A77470_CLK_P),
        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,   R8A77470_CLK_P),
        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-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)),
};

static const unsigned int r8a77470_crit_mod_clks[] __initconst = {
        MOD_CLK_ID(402),        /* RWDT */
        MOD_CLK_ID(408),        /* INTC-SYS (GIC) */
};

/*
 * CPG Clock Data
 */

/*
 *    MD        EXTAL           PLL0    PLL1    PLL3
 * 14 13        (MHz)           *1      *2
 *---------------------------------------------------
 * 0  0         20              x80     x78     x50
 * 0  1         26              x60     x60     x56
 * 1  0         Prohibited setting
 * 1  1         30              x52     x52     x50
 *
 * *1 : Table 7.4 indicates VCO output (PLL0 = VCO)
 * *2 : Table 7.4 indicates VCO output (PLL1 = VCO)
 */
#define CPG_PLL_CONFIG_INDEX(md)        ((((md) & BIT(14)) >> 13) | \
                                         (((md) & BIT(13)) >> 13))

static const struct rcar_gen2_cpg_pll_config cpg_pll_configs[4] __initconst = {
        /* EXTAL div    PLL1 mult x2    PLL3 mult */
        { 1,            156,            50,     },
        { 1,            120,            56,     },
        { /* Invalid*/                          },
        { 1,            104,            50,     },
};

static int __init r8a77470_cpg_mssr_init(struct device *dev)
{
        const struct rcar_gen2_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)];

        return rcar_gen2_cpg_init(cpg_pll_config, 2, cpg_mode);
}

const struct cpg_mssr_info r8a77470_cpg_mssr_info __initconst = {
        /* Core Clocks */
        .core_clks = r8a77470_core_clks,
        .num_core_clks = ARRAY_SIZE(r8a77470_core_clks),
        .last_dt_core_clk = LAST_DT_CORE_CLK,
        .num_total_core_clks = MOD_CLK_BASE,

        /* Module Clocks */
        .mod_clks = r8a77470_mod_clks,
        .num_mod_clks = ARRAY_SIZE(r8a77470_mod_clks),
        .num_hw_mod_clks = 12 * 32,

        /* Critical Module Clocks */
        .crit_mod_clks = r8a77470_crit_mod_clks,
        .num_crit_mod_clks = ARRAY_SIZE(r8a77470_crit_mod_clks),

        /* Callbacks */
        .init = r8a77470_cpg_mssr_init,
        .cpg_clk_register = rcar_gen2_cpg_clk_register,
};