drivers/staging/renesas/rcar/ddr/dram_sub_func.c

/*
 * Copyright (c) 2015-2019, Renesas Electronics Corporation. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <common/debug.h>
#include <lib/mmio.h>

#include "dram_sub_func.h"
#include "rcar_def.h"

#if RCAR_SYSTEM_SUSPEND
/* Local defines */
#define DRAM_BACKUP_GPIO_USE		(0)
#include "iic_dvfs.h"
#if PMIC_ROHM_BD9571
#define	PMIC_SLAVE_ADDR			(0x30U)
#define	PMIC_BKUP_MODE_CNT		(0x20U)
#define	PMIC_QLLM_CNT			(0x27U)
#define	BIT_BKUP_CTRL_OUT		((uint8_t)(1U << 4U))
#define	BIT_QLLM_DDR0_EN		((uint8_t)(1U << 0U))
#define	BIT_QLLM_DDR1_EN		((uint8_t)(1U << 1U))
#endif

#define	GPIO_OUTDT1			(0xE6051008U)
#define GPIO_OUTDT3			(0xE6053008U)
#define GPIO_INDT3			(0xE605300CU)
#define GPIO_OUTDT6			(0xE6055408U)

#if DRAM_BACKUP_GPIO_USE == 1
#define GPIO_BKUP_REQB_SHIFT_SALVATOR	(9U)	/* GP1_9 (BKUP_REQB) */
#define GPIO_BKUP_REQB_SHIFT_EBISU	(14U)	/* GP6_14(BKUP_REQB) */
#define GPIO_BKUP_REQB_SHIFT_CONDOR	(1U)	/* GP3_1 (BKUP_REQB) */
#endif
#define GPIO_BKUP_TRG_SHIFT_SALVATOR	(8U)	/* GP1_8 (BKUP_TRG) */
#define GPIO_BKUP_TRG_SHIFT_EBISU	(13U)	/* GP6_13(BKUP_TRG) */
#define GPIO_BKUP_TRG_SHIFT_CONDOR	(0U)	/* GP3_0 (BKUP_TRG) */

#define DRAM_BKUP_TRG_LOOP_CNT	(1000U)
#endif

void rcar_dram_get_boot_status(uint32_t * status)
{
#if RCAR_SYSTEM_SUSPEND

	uint32_t reg_data;
	uint32_t product;
	uint32_t shift;
	uint32_t gpio;

	product = mmio_read_32(PRR) & PRR_PRODUCT_MASK;
	if (product == PRR_PRODUCT_V3H) {
		shift = GPIO_BKUP_TRG_SHIFT_CONDOR;
		gpio = GPIO_INDT3;
	} else if (product == PRR_PRODUCT_E3) {
		shift = GPIO_BKUP_TRG_SHIFT_EBISU;
		gpio = GPIO_INDT6;
	} else {
		shift = GPIO_BKUP_TRG_SHIFT_SALVATOR;
		gpio = GPIO_INDT1;
	}

	reg_data = mmio_read_32(gpio);
	if (0U != (reg_data & ((uint32_t)1U << shift))) {
		*status = DRAM_BOOT_STATUS_WARM;
	} else {
		*status = DRAM_BOOT_STATUS_COLD;
	}
#else	/* RCAR_SYSTEM_SUSPEND */
	*status = DRAM_BOOT_STATUS_COLD;
#endif	/* RCAR_SYSTEM_SUSPEND */
}

int32_t rcar_dram_update_boot_status(uint32_t status)
{
	int32_t ret = 0;
#if RCAR_SYSTEM_SUSPEND
	uint32_t reg_data;
#if PMIC_ROHM_BD9571
#if DRAM_BACKUP_GPIO_USE == 0
	uint8_t bkup_mode_cnt = 0U;
#else
	uint32_t reqb, outd;
#endif
	uint8_t qllm_cnt = 0U;
	int32_t i2c_dvfs_ret = -1;
#endif
	uint32_t loop_count;
	uint32_t product;
	uint32_t trg;
	uint32_t gpio;

	product = mmio_read_32(PRR) & PRR_PRODUCT_MASK;
	if (product == PRR_PRODUCT_V3H) {
#if DRAM_BACKUP_GPIO_USE == 1
		reqb = GPIO_BKUP_REQB_SHIFT_CONDOR;
		outd = GPIO_OUTDT3;
#endif
		trg = GPIO_BKUP_TRG_SHIFT_CONDOR;
		gpio = GPIO_INDT3;
	} else if (product == PRR_PRODUCT_E3) {
#if DRAM_BACKUP_GPIO_USE == 1
		reqb = GPIO_BKUP_REQB_SHIFT_EBISU;
		outd = GPIO_OUTDT6;
#endif
		trg = GPIO_BKUP_TRG_SHIFT_EBISU;
		gpio = GPIO_INDT6;
	} else {
#if DRAM_BACKUP_GPIO_USE == 1
		reqb = GPIO_BKUP_REQB_SHIFT_SALVATOR;
		outd = GPIO_OUTDT1;
#endif
		trg = GPIO_BKUP_TRG_SHIFT_SALVATOR;
		gpio = GPIO_INDT1;
	}

	if (status == DRAM_BOOT_STATUS_WARM) {
#if DRAM_BACKUP_GPIO_USE==1
	mmio_setbits_32(outd, 1U << reqb);
#else
#if PMIC_ROHM_BD9571
		/* Set BKUP_CRTL_OUT=High (BKUP mode cnt register) */
		i2c_dvfs_ret = rcar_iic_dvfs_receive(PMIC_SLAVE_ADDR,
				PMIC_BKUP_MODE_CNT, &bkup_mode_cnt);
		if (0 != i2c_dvfs_ret) {
			ERROR("BKUP mode cnt READ ERROR.\n");
			ret = DRAM_UPDATE_STATUS_ERR;
		} else {
			bkup_mode_cnt &= (uint8_t)~BIT_BKUP_CTRL_OUT;
			i2c_dvfs_ret = rcar_iic_dvfs_send(PMIC_SLAVE_ADDR,
					PMIC_BKUP_MODE_CNT, bkup_mode_cnt);
			if (0 != i2c_dvfs_ret) {
				ERROR("BKUP mode cnt WRITE ERROR. "
					"value = %d\n", bkup_mode_cnt);
				ret = DRAM_UPDATE_STATUS_ERR;
			}
		}
#endif /* PMIC_ROHM_BD9571 */
#endif /* DRAM_BACKUP_GPIO_USE==1 */
		/* Wait BKUP_TRG=Low */
		loop_count = DRAM_BKUP_TRG_LOOP_CNT;
		while (0U < loop_count) {
			reg_data = mmio_read_32(gpio);
			if ((reg_data &
				((uint32_t)1U << trg)) == 0U) {
				break;
			}
			loop_count--;
		}
		if (0U == loop_count) {
			ERROR(	"\nWarm booting...\n" \
				" The potential of BKUP_TRG did not switch " \
				"to Low.\n If you expect the operation of " \
				"cold boot,\n check the board configuration" \
				" (ex, Dip-SW) and/or the H/W failure.\n");
			ret = DRAM_UPDATE_STATUS_ERR;
		}
	}
#if PMIC_ROHM_BD9571
	if(0 == ret) {
		qllm_cnt = (BIT_QLLM_DDR0_EN | BIT_QLLM_DDR1_EN);
		i2c_dvfs_ret = rcar_iic_dvfs_send(PMIC_SLAVE_ADDR,
				PMIC_QLLM_CNT, qllm_cnt);
		if (0 != i2c_dvfs_ret) {
			ERROR("QLLM cnt WRITE ERROR. "
				"value = %d\n", qllm_cnt);
			ret = DRAM_UPDATE_STATUS_ERR;
		}
	}
#endif
#endif
	return ret;
}