/*
 * Copyright (c) 2023, MediaTek Inc. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <common/debug.h>
#include <drivers/spm/mt_spm_resource_req.h>
#include <lib/pm/mtk_pm.h>
#include <lpm/mt_lp_api.h>
#include <lpm/mt_lp_rm.h>
#include <mt_spm.h>
#include <mt_spm_cond.h>
#include <mt_spm_conservation.h>
#include <mt_spm_constraint.h>
#include <mt_spm_idle.h>
#include <mt_spm_internal.h>
#include <mt_spm_notifier.h>
#include "mt_spm_rc_api.h"
#include "mt_spm_rc_internal.h"
#include <mt_spm_reg.h>
#include <mt_spm_suspend.h>

#define CONSTRAINT_DRAM_ALLOW (MT_RM_CONSTRAINT_ALLOW_DRAM_S0 | \
			       MT_RM_CONSTRAINT_ALLOW_DRAM_S1 | \
			       MT_RM_CONSTRAINT_ALLOW_CPU_BUCK_OFF)

#define CONSTRAINT_DRAM_PCM_FLAG (SPM_FLAG_DISABLE_INFRA_PDN | \
				  SPM_FLAG_DISABLE_VCORE_DVS | \
				  SPM_FLAG_DISABLE_VCORE_DFS | \
				  SPM_FLAG_SRAM_SLEEP_CTRL | \
				  SPM_FLAG_KEEP_CSYSPWRACK_HIGH | \
				  SPM_FLAG_DISABLE_DRAMC_MCU_SRAM_SLEEP)

#define CONSTRAINT_DRAM_PCM_FLAG1 (0)

#define CONSTRAINT_DRAM_RESOURCE_REQ (MT_SPM_SYSPLL | MT_SPM_INFRA | MT_SPM_26M)

static struct mt_spm_cond_tables cond_dram = {
	.table_cg = {
		0xFF5DD002,	/* MTCMOS1 */
		0x0000003C,	/* MTCMOS2 */
		0x27AF8000,	/* INFRA0  */
		0x20010876,	/* INFRA1  */
		0x86000640,	/* INFRA2  */
		0x00000000,	/* INFRA3  */
		0x80000000,	/* INFRA4  */
		0x01002A00,	/* PERI0   */
		0x00080000,	/* VPPSYS0_0  */
		0x38803000,     /* VPPSYS0_1  */
		0x00081450,	/* VPPSYS1_0  */
		0x00003000,     /* VPPSYS1_1  */
		0x00000000,	/* VDOSYS0_0  */
		0x00000000,     /* VDOSYS0_1  */
		0x000001F8,	/* VDOSYS1_0  */
		0x000001E0,     /* VDOSYS1_1  */
		0x00FB0007,	/* VDOSYS1_2  */
	},
	.table_pll = 0U,
};

static struct mt_spm_cond_tables cond_dram_res = {
	.table_cg = { 0U },
	.table_pll = 0U,
};

static struct constraint_status status = {
	.id = MT_RM_CONSTRAINT_ID_DRAM,
	.is_valid = (MT_SPM_RC_VALID_SW |
		     MT_SPM_RC_VALID_COND_CHECK |
		     MT_SPM_RC_VALID_COND_LATCH |
		     MT_SPM_RC_VALID_XSOC_BBLPM |
		     MT_SPM_RC_VALID_TRACE_TIME),
	.is_cond_block = 0U,
	.enter_cnt = 0U,
	.cond_res = &cond_dram_res,
	.residency = 0ULL,
};

static unsigned short ext_status_dram;

int spm_dram_conduct(int state_id, struct spm_lp_scen *spm_lp, unsigned int *resource_req)
{
	unsigned int res_req = CONSTRAINT_DRAM_RESOURCE_REQ;

	if ((spm_lp == NULL) || (resource_req == NULL)) {
		return -1;
	}

	spm_lp->pwrctrl->pcm_flags = (uint32_t)CONSTRAINT_DRAM_PCM_FLAG;
	spm_lp->pwrctrl->pcm_flags1 = (uint32_t)CONSTRAINT_DRAM_PCM_FLAG1;

	*resource_req |= res_req;
	return 0;
}

bool spm_is_valid_rc_dram(unsigned int cpu, int state_id)
{
	return (!(status.is_cond_block && (status.is_valid & MT_SPM_RC_VALID_COND_CHECK)) &&
		IS_MT_RM_RC_READY(status.is_valid) &&
		(IS_PLAT_SUSPEND_ID(state_id) ||
		 (state_id == MT_PLAT_PWR_STATE_SYSTEM_MEM) ||
		 (state_id == MT_PLAT_PWR_STATE_SYSTEM_PLL) ||
		 (state_id == MT_PLAT_PWR_STATE_SYSTEM_BUS)));
}

static int update_rc_condition(const void *val)
{
	const struct mt_spm_cond_tables *tlb = (const struct mt_spm_cond_tables *)val;
	const struct mt_spm_cond_tables *tlb_check = (const struct mt_spm_cond_tables *)&cond_dram;

	if (tlb == NULL) {
		return MT_RM_STATUS_BAD;
	}

	status.is_cond_block = mt_spm_cond_check(tlb, tlb_check,
						 (status.is_valid & MT_SPM_RC_VALID_COND_LATCH) ?
						  &cond_dram_res : NULL);
	return MT_RM_STATUS_OK;
}

static void update_rc_clkbuf_status(const void *val)
{
	unsigned int is_flight = (val) ? !!(*((unsigned int *)val) == FLIGHT_MODE_ON) : 0;

	if (is_flight != 0U) {
		spm_rc_constraint_valid_set(MT_RM_CONSTRAINT_ID_DRAM,
					    MT_RM_CONSTRAINT_ID_DRAM,
					    MT_SPM_RC_VALID_FLIGHTMODE,
					    (struct constraint_status * const)&status);
	} else {
		spm_rc_constraint_valid_clr(MT_RM_CONSTRAINT_ID_DRAM,
					    MT_RM_CONSTRAINT_ID_DRAM,
					    MT_SPM_RC_VALID_FLIGHTMODE,
					    (struct constraint_status * const)&status);
	}
}

static void update_rc_ufs_status(const void *val)
{
	unsigned int is_ufs_h8 = (val) ? !!(*((unsigned int *)val) == UFS_REF_CLK_OFF) : 0;

	if (is_ufs_h8 != 0U) {
		spm_rc_constraint_valid_set(MT_RM_CONSTRAINT_ID_DRAM,
					    MT_RM_CONSTRAINT_ID_DRAM,
					    MT_SPM_RC_VALID_UFS_H8,
					    (struct constraint_status * const)&status);
	} else {
		spm_rc_constraint_valid_clr(MT_RM_CONSTRAINT_ID_DRAM,
					    MT_RM_CONSTRAINT_ID_DRAM,
					    MT_SPM_RC_VALID_UFS_H8,
					    (struct constraint_status * const)&status);
	}
}

static void update_rc_status(const void *val)
{
	const struct rc_common_state *st;

	st = (const struct rc_common_state *)val;

	if (st == NULL) {
		return;
	}

	if (st->type == CONSTRAINT_UPDATE_COND_CHECK) {
		struct mt_spm_cond_tables * const tlb = &cond_dram;

		spm_rc_condition_modifier(st->id, st->act, st->value,
					  MT_RM_CONSTRAINT_ID_DRAM, tlb);
	} else if ((st->type == CONSTRAINT_UPDATE_VALID) ||
		   (st->type == CONSTRAINT_RESIDNECY)) {
		spm_rc_constraint_status_set(st->id, st->type, st->act,
					     MT_RM_CONSTRAINT_ID_DRAM,
					     (struct constraint_status * const)st->value,
					     (struct constraint_status * const)&status);
	} else {
		INFO("[%s:%d] - Unknown type: 0x%x\n", __func__, __LINE__, st->type);
	}
}

int spm_update_rc_dram(int state_id, int type, const void *val)
{
	int res = MT_RM_STATUS_OK;

	switch (type) {
	case PLAT_RC_UPDATE_CONDITION:
		res = update_rc_condition(val);
		break;
	case PLAT_RC_CLKBUF_STATUS:
		update_rc_clkbuf_status(val);
		break;
	case PLAT_RC_UFS_STATUS:
		update_rc_ufs_status(val);
		break;
	case PLAT_RC_STATUS:
		update_rc_status(val);
		break;
	default:
		INFO("[%s:%d] - Do nothing for type: %d\n", __func__, __LINE__, type);
		break;
	}

	return res;
}

unsigned int spm_allow_rc_dram(int state_id)
{
	return CONSTRAINT_DRAM_ALLOW;
}

int spm_run_rc_dram(unsigned int cpu, int state_id)
{
	unsigned int ext_op = MT_SPM_EX_OP_HW_S1_DETECT;
	unsigned int allows = CONSTRAINT_DRAM_ALLOW;

	ext_status_dram = status.is_valid;

	if (IS_MT_SPM_RC_BBLPM_MODE(ext_status_dram)) {
#ifdef MT_SPM_USING_SRCLKEN_RC
		ext_op |= MT_SPM_EX_OP_SRCLKEN_RC_BBLPM;
#else
		allows |= MT_RM_CONSTRAINT_ALLOW_BBLPM;
#endif
	}

#ifndef MTK_PLAT_SPM_SSPM_NOTIFIER_UNSUPPORT
	mt_spm_sspm_notify_u32(MT_SPM_NOTIFY_LP_ENTER, allows | (IS_PLAT_SUSPEND_ID(state_id) ?
			       (MT_RM_CONSTRAINT_ALLOW_AP_SUSPEND) : (0U)));
#else
	(void)allows;
#endif

	if (ext_status_dram & MT_SPM_RC_VALID_TRACE_TIME) {
		ext_op |= MT_SPM_EX_OP_TRACE_TIMESTAMP_EN;
	}

	if (IS_PLAT_SUSPEND_ID(state_id)) {
		mt_spm_suspend_enter(state_id,
				     (MT_SPM_EX_OP_CLR_26M_RECORD |
				      MT_SPM_EX_OP_SET_WDT |
				      MT_SPM_EX_OP_SET_SUSPEND_MODE |
				      MT_SPM_EX_OP_HW_S1_DETECT),
				     CONSTRAINT_DRAM_RESOURCE_REQ);
	} else {
		mt_spm_idle_generic_enter(state_id, ext_op, spm_dram_conduct);
	}

	return 0;
}

int spm_reset_rc_dram(unsigned int cpu, int state_id)
{
	unsigned int ext_op = MT_SPM_EX_OP_HW_S1_DETECT;
	unsigned int allows = CONSTRAINT_DRAM_ALLOW;

	if (IS_MT_SPM_RC_BBLPM_MODE(ext_status_dram)) {
#ifdef MT_SPM_USING_SRCLKEN_RC
		ext_op |= MT_SPM_EX_OP_SRCLKEN_RC_BBLPM;
#else
		allows |= MT_RM_CONSTRAINT_ALLOW_BBLPM;
#endif
	}

#ifndef MTK_PLAT_SPM_SSPM_NOTIFIER_UNSUPPORT
	mt_spm_sspm_notify_u32(MT_SPM_NOTIFY_LP_LEAVE, allows);
#else
	(void)allows;
#endif

	if (ext_status_dram & MT_SPM_RC_VALID_TRACE_TIME) {
		ext_op |= MT_SPM_EX_OP_TRACE_TIMESTAMP_EN;
	}

	if (IS_PLAT_SUSPEND_ID(state_id)) {
		mt_spm_suspend_resume(state_id,
				      (MT_SPM_EX_OP_SET_WDT | MT_SPM_EX_OP_HW_S1_DETECT),
				      NULL);
	} else {
		struct wake_status *waken = NULL;

		if (spm_unlikely(status.is_valid & MT_SPM_RC_VALID_TRACE_EVENT)) {
			ext_op |= MT_SPM_EX_OP_TRACE_LP;
		}
		mt_spm_idle_generic_resume(state_id, ext_op, &waken, NULL);
		status.enter_cnt++;

		if (spm_unlikely(status.is_valid & MT_SPM_RC_VALID_RESIDNECY)) {
			status.residency += (waken != NULL) ? waken->tr.comm.timer_out : 0;
		}
	}

	return 0;
}

int spm_get_status_rc_dram(unsigned int type, void *priv)
{
	int ret = MT_RM_STATUS_OK;

	if (type == PLAT_RC_STATUS) {
		int res = 0;
		struct rc_common_state *st = (struct rc_common_state *)priv;

		if (st == NULL) {
			return MT_RM_STATUS_BAD;
		}

		res = spm_rc_constraint_status_get(st->id, st->type,
						   st->act, MT_RM_CONSTRAINT_ID_DRAM,
						   (struct constraint_status * const)&status,
						   (struct constraint_status * const)st->value);
		if ((res == 0) && (st->id != MT_RM_CONSTRAINT_ID_ALL)) {
			ret = MT_RM_STATUS_STOP;
		}
	}
	return ret;
}