/*
 * Copyright (c) 2021, MediaTek Inc. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <common/debug.h>
#include <lib/mmio.h>
#include <mt_spm.h>
#include <mt_spm_conservation.h>
#include <mt_spm_internal.h>
#include <mt_spm_rc_internal.h>
#include <mt_spm_reg.h>
#include <mt_spm_resource_req.h>
#include <mt_spm_suspend.h>
#include <plat_pm.h>
#include <uart.h>

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

#define SPM_SUSPEND_SLEEP_PCM_FLAG1	0

#define SPM_SUSPEND_PCM_FLAG				\
	(SPM_FLAG_DISABLE_VCORE_DVS |			\
	 SPM_FLAG_DISABLE_VCORE_DFS |			\
	 SPM_FLAG_ENABLE_TIA_WORKAROUND |		\
	 SPM_FLAG_DISABLE_DRAMC_MCU_SRAM_SLEEP |	\
	 SPM_FLAG_SRAM_SLEEP_CTRL)

#define SPM_SUSPEND_PCM_FLAG1		0

/* Suspend spm power control */
#define __WAKE_SRC_FOR_SUSPEND_COMMON__			\
	(R12_PCM_TIMER |				\
	 R12_KP_IRQ_B |					\
	 R12_APWDT_EVENT_B |				\
	 R12_CONN2AP_SPM_WAKEUP_B |			\
	 R12_EINT_EVENT_B |				\
	 R12_CONN_WDT_IRQ_B |				\
	 R12_CCIF0_EVENT_B |				\
	 R12_SSPM2SPM_WAKEUP_B |			\
	 R12_SCP2SPM_WAKEUP_B |				\
	 R12_USBX_CDSC_B |				\
	 R12_USBX_POWERDWN_B |				\
	 R12_SYS_TIMER_EVENT_B |			\
	 R12_EINT_EVENT_SECURE_B |			\
	 R12_SYS_CIRQ_IRQ_B |				\
	 R12_MD2AP_PEER_EVENT_B |			\
	 R12_MD1_WDT_B |				\
	 R12_CLDMA_EVENT_B |				\
	 R12_REG_CPU_WAKEUP |				\
	 R12_APUSYS_WAKE_HOST_B)

#if defined(CFG_MICROTRUST_TEE_SUPPORT)
#define WAKE_SRC_FOR_SUSPEND (__WAKE_SRC_FOR_SUSPEND_COMMON__)
#else
#define WAKE_SRC_FOR_SUSPEND			\
	(__WAKE_SRC_FOR_SUSPEND_COMMON__ |	\
	 R12_SEJ_EVENT_B)
#endif

static struct pwr_ctrl suspend_ctrl = {
	.wake_src = WAKE_SRC_FOR_SUSPEND,

	/* SPM_AP_STANDBY_CON */
	/* [0] */
	.reg_wfi_op = 0,
	/* [1] */
	.reg_wfi_type = 0,
	/* [2] */
	.reg_mp0_cputop_idle_mask = 0,
	/* [3] */
	.reg_mp1_cputop_idle_mask = 0,
	/* [4] */
	.reg_mcusys_idle_mask = 0,
	/* [25] */
	.reg_md_apsrc_1_sel = 0,
	/* [26] */
	.reg_md_apsrc_0_sel = 0,
	/* [29] */
	.reg_conn_apsrc_sel = 0,

	/* SPM_SRC_REQ */
	/* [0] */
	.reg_spm_apsrc_req = 0,
	/* [1] */
	.reg_spm_f26m_req = 0,
	/* [3] */
	.reg_spm_infra_req = 0,
	/* [4] */
	.reg_spm_vrf18_req = 0,
	/* [7] FIXME: default disable HW Auto S1*/
	.reg_spm_ddr_en_req = 1,
	/* [8] */
	.reg_spm_dvfs_req = 0,
	/* [9] */
	.reg_spm_sw_mailbox_req = 0,
	/* [10] */
	.reg_spm_sspm_mailbox_req = 0,
	/* [11] */
	.reg_spm_adsp_mailbox_req = 0,
	/* [12] */
	.reg_spm_scp_mailbox_req = 0,

	/* SPM_SRC_MASK */
	/* [0] */
	.reg_sspm_srcclkena_0_mask_b = 1,
	/* [1] */
	.reg_sspm_infra_req_0_mask_b = 1,
	/* [2] */
	.reg_sspm_apsrc_req_0_mask_b = 1,
	/* [3] */
	.reg_sspm_vrf18_req_0_mask_b = 1,
	/* [4] */
	.reg_sspm_ddr_en_0_mask_b = 1,
	/* [5] */
	.reg_scp_srcclkena_mask_b = 1,
	/* [6] */
	.reg_scp_infra_req_mask_b = 1,
	/* [7] */
	.reg_scp_apsrc_req_mask_b = 1,
	/* [8] */
	.reg_scp_vrf18_req_mask_b = 1,
	/* [9] */
	.reg_scp_ddr_en_mask_b = 1,
	/* [10] */
	.reg_audio_dsp_srcclkena_mask_b = 1,
	/* [11] */
	.reg_audio_dsp_infra_req_mask_b = 1,
	/* [12] */
	.reg_audio_dsp_apsrc_req_mask_b = 1,
	/* [13] */
	.reg_audio_dsp_vrf18_req_mask_b = 1,
	/* [14] */
	.reg_audio_dsp_ddr_en_mask_b = 1,
	/* [15] */
	.reg_apu_srcclkena_mask_b = 1,
	/* [16] */
	.reg_apu_infra_req_mask_b = 1,
	/* [17] */
	.reg_apu_apsrc_req_mask_b = 1,
	/* [18] */
	.reg_apu_vrf18_req_mask_b = 1,
	/* [19] */
	.reg_apu_ddr_en_mask_b = 1,
	/* [20] */
	.reg_cpueb_srcclkena_mask_b = 1,
	/* [21] */
	.reg_cpueb_infra_req_mask_b = 1,
	/* [22] */
	.reg_cpueb_apsrc_req_mask_b = 1,
	/* [23] */
	.reg_cpueb_vrf18_req_mask_b = 1,
	/* [24] */
	.reg_cpueb_ddr_en_mask_b = 1,
	/* [25] */
	.reg_bak_psri_srcclkena_mask_b = 0,
	/* [26] */
	.reg_bak_psri_infra_req_mask_b = 0,
	/* [27] */
	.reg_bak_psri_apsrc_req_mask_b = 0,
	/* [28] */
	.reg_bak_psri_vrf18_req_mask_b = 0,
	/* [29] */
	.reg_bak_psri_ddr_en_mask_b = 0,

	/* SPM_SRC2_MASK */
	/* [0] */
	.reg_msdc0_srcclkena_mask_b = 1,
	/* [1] */
	.reg_msdc0_infra_req_mask_b = 1,
	/* [2] */
	.reg_msdc0_apsrc_req_mask_b = 1,
	/* [3] */
	.reg_msdc0_vrf18_req_mask_b = 1,
	/* [4] */
	.reg_msdc0_ddr_en_mask_b = 1,
	/* [5] */
	.reg_msdc1_srcclkena_mask_b = 1,
	/* [6] */
	.reg_msdc1_infra_req_mask_b = 1,
	/* [7] */
	.reg_msdc1_apsrc_req_mask_b = 1,
	/* [8] */
	.reg_msdc1_vrf18_req_mask_b = 1,
	/* [9] */
	.reg_msdc1_ddr_en_mask_b = 1,
	/* [10] */
	.reg_msdc2_srcclkena_mask_b = 1,
	/* [11] */
	.reg_msdc2_infra_req_mask_b = 1,
	/* [12] */
	.reg_msdc2_apsrc_req_mask_b = 1,
	/* [13] */
	.reg_msdc2_vrf18_req_mask_b = 1,
	/* [14] */
	.reg_msdc2_ddr_en_mask_b = 1,
	/* [15] */
	.reg_ufs_srcclkena_mask_b = 0,
	/* [16] */
	.reg_ufs_infra_req_mask_b = 0,
	/* [17] */
	.reg_ufs_apsrc_req_mask_b = 0,
	/* [18] */
	.reg_ufs_vrf18_req_mask_b = 0,
	/* [19] */
	.reg_ufs_ddr_en_mask_b = 0,
	/* [20] */
	.reg_usb_srcclkena_mask_b = 1,
	/* [21] */
	.reg_usb_infra_req_mask_b = 1,
	/* [22] */
	.reg_usb_apsrc_req_mask_b = 1,
	/* [23] */
	.reg_usb_vrf18_req_mask_b = 1,
	/* [24] */
	.reg_usb_ddr_en_mask_b = 1,
	/* [25] */
	.reg_pextp_p0_srcclkena_mask_b = 1,
	/* [26] */
	.reg_pextp_p0_infra_req_mask_b = 1,
	/* [27] */
	.reg_pextp_p0_apsrc_req_mask_b = 1,
	/* [28] */
	.reg_pextp_p0_vrf18_req_mask_b = 1,
	/* [29] */
	.reg_pextp_p0_ddr_en_mask_b = 1,

	/* SPM_SRC3_MASK */
	/* [0] */
	.reg_pextp_p1_srcclkena_mask_b = 1,
	/* [1] */
	.reg_pextp_p1_infra_req_mask_b = 1,
	/* [2] */
	.reg_pextp_p1_apsrc_req_mask_b = 1,
	/* [3] */
	.reg_pextp_p1_vrf18_req_mask_b = 1,
	/* [4] */
	.reg_pextp_p1_ddr_en_mask_b = 1,
	/* [5] */
	.reg_gce0_infra_req_mask_b = 1,
	/* [6] */
	.reg_gce0_apsrc_req_mask_b = 1,
	/* [7] */
	.reg_gce0_vrf18_req_mask_b = 1,
	/* [8] */
	.reg_gce0_ddr_en_mask_b = 1,
	/* [9] */
	.reg_gce1_infra_req_mask_b = 1,
	/* [10] */
	.reg_gce1_apsrc_req_mask_b = 1,
	/* [11] */
	.reg_gce1_vrf18_req_mask_b = 1,
	/* [12] */
	.reg_gce1_ddr_en_mask_b = 1,
	/* [13] */
	.reg_spm_srcclkena_reserved_mask_b = 1,
	/* [14] */
	.reg_spm_infra_req_reserved_mask_b = 1,
	/* [15] */
	.reg_spm_apsrc_req_reserved_mask_b = 1,
	/* [16] */
	.reg_spm_vrf18_req_reserved_mask_b = 1,
	/* [17] */
	.reg_spm_ddr_en_reserved_mask_b = 1,
	/* [18] */
	.reg_disp0_apsrc_req_mask_b = 1,
	/* [19] */
	.reg_disp0_ddr_en_mask_b = 1,
	/* [20] */
	.reg_disp1_apsrc_req_mask_b = 1,
	/* [21] */
	.reg_disp1_ddr_en_mask_b = 1,
	/* [22] */
	.reg_disp2_apsrc_req_mask_b = 1,
	/* [23] */
	.reg_disp2_ddr_en_mask_b = 1,
	/* [24] */
	.reg_disp3_apsrc_req_mask_b = 1,
	/* [25] */
	.reg_disp3_ddr_en_mask_b = 1,
	/* [26] */
	.reg_infrasys_apsrc_req_mask_b = 0,
	/* [27] */
	.reg_infrasys_ddr_en_mask_b = 1,

	/* [28] */
	.reg_cg_check_srcclkena_mask_b = 1,
	/* [29] */
	.reg_cg_check_apsrc_req_mask_b = 1,
	/* [30] */
	.reg_cg_check_vrf18_req_mask_b = 1,
	/* [31] */
	.reg_cg_check_ddr_en_mask_b = 1,

	/* SPM_SRC4_MASK */
	/* [8:0] */
	.reg_mcusys_merge_apsrc_req_mask_b = 0x17,
	/* [17:9] */
	.reg_mcusys_merge_ddr_en_mask_b = 0x17,
	/* [19:18] */
	.reg_dramc_md32_infra_req_mask_b = 0,
	/* [21:20] */
	.reg_dramc_md32_vrf18_req_mask_b = 0,
	/* [23:22] */
	.reg_dramc_md32_ddr_en_mask_b = 0,
	/* [24] */
	.reg_dvfsrc_event_trigger_mask_b = 1,

	/* SPM_WAKEUP_EVENT_MASK2 */
	/* [3:0] */
	.reg_sc_sw2spm_wakeup_mask_b = 0,
	/* [4] */
	.reg_sc_adsp2spm_wakeup_mask_b = 0,
	/* [8:5] */
	.reg_sc_sspm2spm_wakeup_mask_b = 0,
	/* [9] */
	.reg_sc_scp2spm_wakeup_mask_b = 0,
	/* [10] */
	.reg_csyspwrup_ack_mask = 0,
	/* [11] */
	.reg_csyspwrup_req_mask = 1,

	/* SPM_WAKEUP_EVENT_MASK */
	/* [31:0] */
	.reg_wakeup_event_mask = 0xC1382213,

	/* SPM_WAKEUP_EVENT_EXT_MASK */
	/* [31:0] */
	.reg_ext_wakeup_event_mask = 0xFFFFFFFF,
};

struct spm_lp_scen __spm_suspend = {
	.pwrctrl = &suspend_ctrl,
};

int mt_spm_suspend_mode_set(int mode)
{
	if (mode == MT_SPM_SUSPEND_SLEEP) {
		suspend_ctrl.pcm_flags = SPM_SUSPEND_SLEEP_PCM_FLAG;
		suspend_ctrl.pcm_flags1 = SPM_SUSPEND_SLEEP_PCM_FLAG1;
	} else {
		suspend_ctrl.pcm_flags = SPM_SUSPEND_PCM_FLAG;
		suspend_ctrl.pcm_flags1 = SPM_SUSPEND_PCM_FLAG1;
	}

	return 0;
}

int mt_spm_suspend_enter(int state_id, unsigned int ext_opand,
			 unsigned int resource_req)
{
	/* If FMAudio / ADSP is active, change to sleep suspend mode */
	if ((ext_opand & MT_SPM_EX_OP_SET_SUSPEND_MODE) != 0U) {
		mt_spm_suspend_mode_set(MT_SPM_SUSPEND_SLEEP);
	}

	/* Notify MCUPM that device is going suspend flow */
	mmio_write_32(MCUPM_MBOX_OFFSET_PDN, MCUPM_POWER_DOWN);

	/* Notify UART to sleep */
	mt_uart_save();

	return spm_conservation(state_id, ext_opand,
				&__spm_suspend, resource_req);
}

void mt_spm_suspend_resume(int state_id, unsigned int ext_opand,
			   struct wake_status **status)
{
	spm_conservation_finish(state_id, ext_opand, &__spm_suspend, status);

	/* Notify UART to wakeup */
	mt_uart_restore();

	/* Notify MCUPM that device leave suspend */
	mmio_write_32(MCUPM_MBOX_OFFSET_PDN, 0);

	/* If FMAudio / ADSP is active, change back to suspend mode */
	if ((ext_opand & MT_SPM_EX_OP_SET_SUSPEND_MODE) != 0U) {
		mt_spm_suspend_mode_set(MT_SPM_SUSPEND_SYSTEM_PDN);
	}
}

void mt_spm_suspend_init(void)
{
	spm_conservation_pwrctrl_init(__spm_suspend.pwrctrl);
}