/*
* (C) Copyright 2010-2015
* NVIDIA Corporation <www.nvidia.com>
*
 * SPDX-License-Identifier:     GPL-2.0+
*/

/* Tegra AP (Application Processor) code */

#include <common.h>
#include <linux/bug.h>
#include <asm/io.h>
#include <asm/arch/gp_padctrl.h>
#include <asm/arch/mc.h>
#include <asm/arch-tegra/ap.h>
#include <asm/arch-tegra/clock.h>
#include <asm/arch-tegra/fuse.h>
#include <asm/arch-tegra/pmc.h>
#include <asm/arch-tegra/scu.h>
#include <asm/arch-tegra/tegra.h>
#include <asm/arch-tegra/warmboot.h>

int tegra_get_chip(void)
{
        int rev;
        struct apb_misc_gp_ctlr *gp =
                (struct apb_misc_gp_ctlr *)NV_PA_APB_MISC_GP_BASE;

        /*
         * This is undocumented, Chip ID is bits 15:8 of the register
         * APB_MISC + 0x804, and has value 0x20 for Tegra20, 0x30 for
         * Tegra30, 0x35 for T114, and 0x40 for Tegra124.
         */
        rev = (readl(&gp->hidrev) & HIDREV_CHIPID_MASK) >> HIDREV_CHIPID_SHIFT;
        debug("%s: CHIPID is 0x%02X\n", __func__, rev);

        return rev;
}

int tegra_get_sku_info(void)
{
        int sku_id;
        struct fuse_regs *fuse = (struct fuse_regs *)NV_PA_FUSE_BASE;

        sku_id = readl(&fuse->sku_info) & 0xff;
        debug("%s: SKU info byte is 0x%02X\n", __func__, sku_id);

        return sku_id;
}

int tegra_get_chip_sku(void)
{
        uint sku_id, chip_id;

        chip_id = tegra_get_chip();
        sku_id = tegra_get_sku_info();

        switch (chip_id) {
        case CHIPID_TEGRA20:
                switch (sku_id) {
                case SKU_ID_T20_7:
                case SKU_ID_T20:
                        return TEGRA_SOC_T20;
                case SKU_ID_T25SE:
                case SKU_ID_AP25:
                case SKU_ID_T25:
                case SKU_ID_AP25E:
                case SKU_ID_T25E:
                        return TEGRA_SOC_T25;
                }
                break;
        case CHIPID_TEGRA30:
                switch (sku_id) {
                case SKU_ID_T33:
                case SKU_ID_T30:
                case SKU_ID_TM30MQS_P_A3:
                default:
                        return TEGRA_SOC_T30;
                }
                break;
        case CHIPID_TEGRA114:
                switch (sku_id) {
                case SKU_ID_T114_ENG:
                case SKU_ID_T114_1:
                default:
                        return TEGRA_SOC_T114;
                }
                break;
        case CHIPID_TEGRA124:
                switch (sku_id) {
                case SKU_ID_T124_ENG:
                default:
                        return TEGRA_SOC_T124;
                }
                break;
        case CHIPID_TEGRA210:
                switch (sku_id) {
                case SKU_ID_T210_ENG:
                default:
                        return TEGRA_SOC_T210;
                }
                break;
        }

        /* unknown chip/sku id */
        printf("%s: ERROR: UNKNOWN CHIP/SKU ID COMBO (0x%02X/0x%02X)\n",
                __func__, chip_id, sku_id);
        return TEGRA_SOC_UNKNOWN;
}

#ifndef CONFIG_ARM64
static void enable_scu(void)
{
        struct scu_ctlr *scu = (struct scu_ctlr *)NV_PA_ARM_PERIPHBASE;
        u32 reg;

        /* Only enable the SCU on T20/T25 */
        if (tegra_get_chip() != CHIPID_TEGRA20)
                return;

        /* If SCU already setup/enabled, return */
        if (readl(&scu->scu_ctrl) & SCU_CTRL_ENABLE)
                return;

        /* Invalidate all ways for all processors */
        writel(0xFFFF, &scu->scu_inv_all);

        /* Enable SCU - bit 0 */
        reg = readl(&scu->scu_ctrl);
        reg |= SCU_CTRL_ENABLE;
        writel(reg, &scu->scu_ctrl);
}

static u32 get_odmdata(void)
{
        /*
         * ODMDATA is stored in the BCT in IRAM by the BootROM.
         * The BCT start and size are stored in the BIT in IRAM.
         * Read the data @ bct_start + (bct_size - 12). This works
         * on BCTs for currently supported SoCs, which are locked down.
         * If this changes in new chips, we can revisit this algorithm.
         */
        unsigned long bct_start;
        u32 odmdata;

        bct_start = readl(NV_PA_BASE_SRAM + NVBOOTINFOTABLE_BCTPTR);
        odmdata = readl(bct_start + BCT_ODMDATA_OFFSET);

        return odmdata;
}

static void init_pmc_scratch(void)
{
        struct pmc_ctlr *const pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
        u32 odmdata;
        int i;

        /* SCRATCH0 is initialized by the boot ROM and shouldn't be cleared */
        for (i = 0; i < 23; i++)
                writel(0, &pmc->pmc_scratch1+i);

        /* ODMDATA is for kernel use to determine RAM size, LP config, etc. */
        odmdata = get_odmdata();
        writel(odmdata, &pmc->pmc_scratch20);
}

#ifdef CONFIG_ARMV7_SECURE_RESERVE_SIZE
void protect_secure_section(void)
{
        struct mc_ctlr *mc = (struct mc_ctlr *)NV_PA_MC_BASE;

        /* Must be MB aligned */
        BUILD_BUG_ON(CONFIG_ARMV7_SECURE_BASE & 0xFFFFF);
        BUILD_BUG_ON(CONFIG_ARMV7_SECURE_RESERVE_SIZE & 0xFFFFF);

        writel(CONFIG_ARMV7_SECURE_BASE, &mc->mc_security_cfg0);
        writel(CONFIG_ARMV7_SECURE_RESERVE_SIZE >> 20, &mc->mc_security_cfg1);
}
#endif

#if defined(CONFIG_ARMV7_NONSEC)
static void smmu_flush(struct mc_ctlr *mc)
{
        (void)readl(&mc->mc_smmu_config);
}

static void smmu_enable(void)
{
        struct mc_ctlr *mc = (struct mc_ctlr *)NV_PA_MC_BASE;
        u32 value;

        /*
         * Enable translation for all clients since access to this register
         * is restricted to TrustZone-secured requestors. The kernel will use
         * the per-SWGROUP enable bits to enable or disable translations.
         */
        writel(0xffffffff, &mc->mc_smmu_translation_enable_0);
        writel(0xffffffff, &mc->mc_smmu_translation_enable_1);
        writel(0xffffffff, &mc->mc_smmu_translation_enable_2);
        writel(0xffffffff, &mc->mc_smmu_translation_enable_3);

        /*
         * Enable SMMU globally since access to this register is restricted
         * to TrustZone-secured requestors.
         */
        value = readl(&mc->mc_smmu_config);
        value |= TEGRA_MC_SMMU_CONFIG_ENABLE;
        writel(value, &mc->mc_smmu_config);

        smmu_flush(mc);
}
#else
static void smmu_enable(void)
{
}
#endif

void s_init(void)
{
        /* Init PMC scratch memory */
        init_pmc_scratch();

        enable_scu();

        /* init the cache */
        config_cache();

        /* enable SMMU */
        smmu_enable();
}
#endif