gpc.c

/*
 * Copyright 2019-2020 NXP
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>

#include <common/debug.h>
#include <drivers/delay_timer.h>
#include <lib/mmio.h>
#include <lib/psci/psci.h>
#include <lib/smccc.h>
#include <services/std_svc.h>

#include <gpc.h>
#include <imx_sip_svc.h>
#include <platform_def.h>

#define CCGR(x)		(0x4000 + (x) * 0x10)

void imx_gpc_init(void)
{
	unsigned int val;
	int i;

	/* mask all the wakeup irq by default */
	for (i = 0; i < 4; i++) {
		mmio_write_32(IMX_GPC_BASE + IMR1_CORE0_A53 + i * 4, ~0x0);
		mmio_write_32(IMX_GPC_BASE + IMR1_CORE1_A53 + i * 4, ~0x0);
		mmio_write_32(IMX_GPC_BASE + IMR1_CORE2_A53 + i * 4, ~0x0);
		mmio_write_32(IMX_GPC_BASE + IMR1_CORE3_A53 + i * 4, ~0x0);
		mmio_write_32(IMX_GPC_BASE + IMR1_CORE0_M4 + i * 4, ~0x0);
	}

	val = mmio_read_32(IMX_GPC_BASE + LPCR_A53_BSC);
	/* use GIC wake_request to wakeup C0~C3 from LPM */
	val |= CORE_WKUP_FROM_GIC;
	/* clear the MASTER0 LPM handshake */
	val &= ~MASTER0_LPM_HSK;
	mmio_write_32(IMX_GPC_BASE + LPCR_A53_BSC, val);

	/* clear MASTER1 & MASTER2 mapping in CPU0(A53) */
	mmio_clrbits_32(IMX_GPC_BASE + MST_CPU_MAPPING, (MASTER1_MAPPING |
		MASTER2_MAPPING));

	/* set all mix/PU in A53 domain */
	mmio_write_32(IMX_GPC_BASE + PGC_CPU_0_1_MAPPING, 0xffff);

	/*
	 * Set the CORE & SCU power up timing:
	 * SW = 0x1, SW2ISO = 0x1;
	 * the CPU CORE and SCU power up timming counter
	 * is drived  by 32K OSC, each domain's power up
	 * latency is (SW + SW2ISO) / 32768
	 */
	mmio_write_32(IMX_GPC_BASE + COREx_PGC_PCR(0) + 0x4, 0x401);
	mmio_write_32(IMX_GPC_BASE + COREx_PGC_PCR(1) + 0x4, 0x401);
	mmio_write_32(IMX_GPC_BASE + COREx_PGC_PCR(2) + 0x4, 0x401);
	mmio_write_32(IMX_GPC_BASE + COREx_PGC_PCR(3) + 0x4, 0x401);
	mmio_write_32(IMX_GPC_BASE + PLAT_PGC_PCR + 0x4, 0x401);
	mmio_write_32(IMX_GPC_BASE + PGC_SCU_TIMING,
		      (0x59 << TMC_TMR_SHIFT) | 0x5B | (0x2 << TRC1_TMC_SHIFT));

	/* set DUMMY PDN/PUP ACK by default for A53 domain */
	mmio_write_32(IMX_GPC_BASE + PGC_ACK_SEL_A53,
		      A53_DUMMY_PUP_ACK | A53_DUMMY_PDN_ACK);

	/* clear DSM by default */
	val = mmio_read_32(IMX_GPC_BASE + SLPCR);
	val &= ~SLPCR_EN_DSM;
	/* enable the fast wakeup wait mode */
	val |= SLPCR_A53_FASTWUP_WAIT_MODE;
	/* clear the RBC */
	val &= ~(0x3f << SLPCR_RBC_COUNT_SHIFT);
	/* set the STBY_COUNT to 0x5, (128 * 30)us */
	val &= ~(0x7 << SLPCR_STBY_COUNT_SHFT);
	val |= (0x5 << SLPCR_STBY_COUNT_SHFT);
	mmio_write_32(IMX_GPC_BASE + SLPCR, val);

	/*
	 * USB PHY power up needs to make sure RESET bit in SRC is clear,
	 * otherwise, the PU power up bit in GPC will NOT self-cleared.
	 * only need to do it once.
	 */
	mmio_clrbits_32(IMX_SRC_BASE + SRC_OTG1PHY_SCR, 0x1);

	/* enable all the power domain by default */
	for (i = 0; i < 103; i++)
		mmio_write_32(IMX_CCM_BASE + CCGR(i), 0x3);
	mmio_write_32(IMX_GPC_BASE + PU_PGC_UP_TRG, 0x485);
}