/*
 * Copyright (c) 2018-2024, Arm Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <assert.h>

#include <libfdt.h>

#include <common/bl_common.h>
#include <common/debug.h>
#include <drivers/arm/css/css_mhu_doorbell.h>
#include <drivers/arm/css/scmi.h>
#include <drivers/generic_delay_timer.h>
#include <plat/arm/common/plat_arm.h>

#include <plat/common/platform.h>

#include <plat/arm/css/common/css_pm.h>

#include <sgi_ras.h>
#include <sgi_variant.h>

sgi_platform_info_t sgi_plat_info;

static scmi_channel_plat_info_t sgi575_scmi_plat_info = {
		.scmi_mbx_mem = CSS_SCMI_PAYLOAD_BASE,
		.db_reg_addr = PLAT_CSS_MHU_BASE + CSS_SCMI_MHU_DB_REG_OFF,
		.db_preserve_mask = 0xfffffffe,
		.db_modify_mask = 0x1,
		.ring_doorbell = &mhu_ring_doorbell,
};

static scmi_channel_plat_info_t plat_rd_scmi_info[] = {
	{
		.scmi_mbx_mem = CSS_SCMI_PAYLOAD_BASE,
		.db_reg_addr = PLAT_CSS_MHU_BASE + SENDER_REG_SET(0),
		.db_preserve_mask = 0xfffffffe,
		.db_modify_mask = 0x1,
		.ring_doorbell = &mhuv2_ring_doorbell,
	},
	#if (CSS_SGI_CHIP_COUNT > 1)
	{
		.scmi_mbx_mem = CSS_SCMI_PAYLOAD_BASE +
			CSS_SGI_REMOTE_CHIP_MEM_OFFSET(1),
		.db_reg_addr = PLAT_CSS_MHU_BASE
			+ CSS_SGI_REMOTE_CHIP_MEM_OFFSET(1) + SENDER_REG_SET(0),
		.db_preserve_mask = 0xfffffffe,
		.db_modify_mask = 0x1,
		.ring_doorbell = &mhuv2_ring_doorbell,
	},
	#endif
	#if (CSS_SGI_CHIP_COUNT > 2)
	{
		.scmi_mbx_mem = CSS_SCMI_PAYLOAD_BASE +
			CSS_SGI_REMOTE_CHIP_MEM_OFFSET(2),
		.db_reg_addr = PLAT_CSS_MHU_BASE +
			CSS_SGI_REMOTE_CHIP_MEM_OFFSET(2) + SENDER_REG_SET(0),
		.db_preserve_mask = 0xfffffffe,
		.db_modify_mask = 0x1,
		.ring_doorbell = &mhuv2_ring_doorbell,
	},
	#endif
	#if (CSS_SGI_CHIP_COUNT > 3)
	{
		.scmi_mbx_mem = CSS_SCMI_PAYLOAD_BASE +
			CSS_SGI_REMOTE_CHIP_MEM_OFFSET(3),
		.db_reg_addr = PLAT_CSS_MHU_BASE +
			CSS_SGI_REMOTE_CHIP_MEM_OFFSET(3) + SENDER_REG_SET(0),
		.db_preserve_mask = 0xfffffffe,
		.db_modify_mask = 0x1,
		.ring_doorbell = &mhuv2_ring_doorbell,
	},
	#endif
};

scmi_channel_plat_info_t *plat_css_get_scmi_info(unsigned int channel_id)
{
	if (sgi_plat_info.platform_id == RD_N1E1_EDGE_SID_VER_PART_NUM ||
		sgi_plat_info.platform_id == RD_V1_SID_VER_PART_NUM ||
		sgi_plat_info.platform_id == RD_N2_SID_VER_PART_NUM ||
		sgi_plat_info.platform_id == RD_V2_SID_VER_PART_NUM ||
		sgi_plat_info.platform_id == RD_N2_CFG1_SID_VER_PART_NUM ||
		sgi_plat_info.platform_id == RD_N2_CFG3_SID_VER_PART_NUM) {
		if (channel_id >= ARRAY_SIZE(plat_rd_scmi_info)) {
			panic();
		}
		return &plat_rd_scmi_info[channel_id];
	} else if (sgi_plat_info.platform_id == SGI575_SSC_VER_PART_NUM) {
		return &sgi575_scmi_plat_info;
	} else {
		panic();
	}
}

void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
				u_register_t arg2, u_register_t arg3)
{
	sgi_plat_info.platform_id = plat_arm_sgi_get_platform_id();
	sgi_plat_info.config_id = plat_arm_sgi_get_config_id();
	sgi_plat_info.multi_chip_mode = plat_arm_sgi_get_multi_chip_mode();

	arm_bl31_early_platform_setup((void *)arg0, arg1, arg2, (void *)arg3);
}

void sgi_bl31_common_platform_setup(void)
{
	generic_delay_timer_init();

	arm_bl31_platform_setup();

	/* Configure the warm reboot SGI for primary core */
	css_setup_cpu_pwr_down_intr();

#if CSS_SYSTEM_GRACEFUL_RESET
	/* Register priority level handlers for reboot */
	ehf_register_priority_handler(PLAT_REBOOT_PRI,
			css_reboot_interrupt_handler);
#endif
}

const plat_psci_ops_t *plat_arm_psci_override_pm_ops(plat_psci_ops_t *ops)
{
	/*
	 * For RD-E1-Edge, only CPU power ON/OFF, PSCI platform callbacks are
	 * supported.
	 */
	if (((sgi_plat_info.platform_id == RD_N1E1_EDGE_SID_VER_PART_NUM) &&
	    (sgi_plat_info.config_id == RD_E1_EDGE_CONFIG_ID))) {
		ops->cpu_standby = NULL;
		ops->system_off = NULL;
		ops->system_reset = NULL;
		ops->get_sys_suspend_power_state = NULL;
		ops->pwr_domain_suspend = NULL;
		ops->pwr_domain_suspend_finish = NULL;
	}

	return css_scmi_override_pm_ops(ops);
}