drivers/phy/samsung/phy-exynosautov920-ufs.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * UFS PHY driver data for Samsung ExynosAuto v920 SoC
 *
 * Copyright (C) 2024 Samsung Electronics Co., Ltd.
 */

#include "phy-samsung-ufs.h"

#define EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CTRL			0x708
#define EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CTRL_MASK		0x1
#define EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CTRL_EN		BIT(0)
#define EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CDR_LOCK_STATUS	0x5e

#define EXYNOSAUTOV920_CDR_LOCK_OFFSET				0xce4

#define PHY_EXYNOSAUTOV920_LANE_OFFSET				0x200
#define PHY_TRSV_REG_CFG_AUTOV920(o, v, d) \
	PHY_TRSV_REG_CFG_OFFSET(o, v, d, PHY_EXYNOSAUTOV920_LANE_OFFSET)

/* Calibration for phy initialization */
static const struct samsung_ufs_phy_cfg exynosautov920_pre_init_cfg[] = {
	PHY_COMN_REG_CFG(0x29, 0x22, PWR_MODE_ANY),
	PHY_COMN_REG_CFG(0x43, 0x10, PWR_MODE_ANY),
	PHY_COMN_REG_CFG(0x3c, 0x14, PWR_MODE_ANY),
	PHY_COMN_REG_CFG(0x46, 0x48, PWR_MODE_ANY),
	PHY_COMN_REG_CFG(0x04, 0x95, PWR_MODE_ANY),
	PHY_COMN_REG_CFG(0x06, 0x30, PWR_MODE_ANY),

	PHY_TRSV_REG_CFG_AUTOV920(0x200, 0x00, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x201, 0x06, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x202, 0x06, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x203, 0x0a, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x204, 0x00, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x205, 0x10, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x207, 0x0c, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x2e1, 0xc0, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x22d, 0xf8, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x234, 0x60, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x238, 0x13, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x239, 0x48, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x23a, 0x01, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x23b, 0x29, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x23c, 0x2a, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x23d, 0x01, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x23e, 0x14, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x23f, 0x13, PWR_MODE_ANY),

	PHY_TRSV_REG_CFG_AUTOV920(0x240, 0x4a, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x243, 0x40, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x244, 0x02, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x25d, 0x00, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x25e, 0x3f, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x25f, 0xff, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x26f, 0xf0, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x273, 0x33, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x274, 0x50, PWR_MODE_ANY),

	PHY_TRSV_REG_CFG_AUTOV920(0x284, 0x02, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x285, 0x02, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x2a2, 0x04, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x27d, 0x01, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x2fa, 0x01, PWR_MODE_ANY),

	PHY_TRSV_REG_CFG_AUTOV920(0x286, 0x03, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x287, 0x03, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x288, 0x03, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x289, 0x03, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x2b3, 0x04, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x2b6, 0x0b, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x2b7, 0x0b, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x2b8, 0x0b, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x2b9, 0x0b, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x2ba, 0x0b, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x2bb, 0x06, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x2bc, 0x06, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x2bd, 0x06, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x2be, 0x06, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x34b, 0x01, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x34c, 0x24, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x34d, 0x23, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x34e, 0x45, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x34f, 0x00, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x350, 0x31, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x351, 0x00, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x352, 0x02, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x353, 0x00, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x354, 0x01, PWR_MODE_ANY),

	PHY_COMN_REG_CFG(0x43, 0x18, PWR_MODE_ANY),
	PHY_COMN_REG_CFG(0x43, 0x00, PWR_MODE_ANY),

	END_UFS_PHY_CFG,
};

/* Calibration for HS mode series A/B */
static const struct samsung_ufs_phy_cfg exynosautov920_pre_pwr_hs_cfg[] = {
	PHY_TRSV_REG_CFG_AUTOV920(0x369, 0x11, PWR_MODE_ANY),
	PHY_TRSV_REG_CFG_AUTOV920(0x246, 0x03, PWR_MODE_ANY),

	END_UFS_PHY_CFG,
};

static const struct samsung_ufs_phy_cfg exynosautov920_post_pwr_hs_cfg[] = {
	END_UFS_PHY_CFG,
};

#define DELAY_IN_US	40
#define RETRY_CNT	100
#define EXYNOSAUTOV920_CDR_LOCK_MASK	0x8

int exynosautov920_ufs_phy_wait_cdr_lock(struct phy *phy, u8 lane)
{
	struct samsung_ufs_phy *ufs_phy = get_samsung_ufs_phy(phy);
	u32 reg, i;

	struct samsung_ufs_phy_cfg cfg[4] = {
		PHY_TRSV_REG_CFG_AUTOV920(0x222, 0x10, PWR_MODE_ANY),
		PHY_TRSV_REG_CFG_AUTOV920(0x222, 0x18, PWR_MODE_ANY),
		PHY_TRSV_REG_CFG_AUTOV920(0x246, 0x01, PWR_MODE_ANY),
		END_UFS_PHY_CFG,
	};

	for (i = 0; i < RETRY_CNT; i++) {
		udelay(DELAY_IN_US);

		reg = readl(ufs_phy->reg_pma + EXYNOSAUTOV920_CDR_LOCK_OFFSET +
			(PHY_APB_ADDR(PHY_EXYNOSAUTOV920_LANE_OFFSET) * lane));

		if ((reg & EXYNOSAUTOV920_CDR_LOCK_MASK)
					== EXYNOSAUTOV920_CDR_LOCK_MASK) {
			samsung_ufs_phy_config(ufs_phy, &cfg[2], lane);
			return 0;
		}

		udelay(DELAY_IN_US);

		/* Disable and enable CDR */
		samsung_ufs_phy_config(ufs_phy, &cfg[0], lane);
		samsung_ufs_phy_config(ufs_phy, &cfg[1], lane);
	}

	dev_err(ufs_phy->dev, "failed to get phy cdr lock\n");
	return -ETIMEDOUT;
}

static const struct samsung_ufs_phy_cfg *exynosautov920_ufs_phy_cfgs[CFG_TAG_MAX] = {
	[CFG_PRE_INIT]          = exynosautov920_pre_init_cfg,
	[CFG_PRE_PWR_HS]        = exynosautov920_pre_pwr_hs_cfg,
	[CFG_POST_PWR_HS]       = exynosautov920_post_pwr_hs_cfg,
};

static const char * const exynosautov920_ufs_phy_clks[] = {
	"ref_clk",
};

const struct samsung_ufs_phy_drvdata exynosautov920_ufs_phy = {
	.cfgs = exynosautov920_ufs_phy_cfgs,
	.isol = {
		.offset = EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CTRL,
		.mask = EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CTRL_MASK,
		.en = EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CTRL_EN,
	},
	.clk_list = exynosautov920_ufs_phy_clks,
	.num_clks = ARRAY_SIZE(exynosautov920_ufs_phy_clks),
	.cdr_lock_status_offset = EXYNOSAUTOV920_EMBEDDED_COMBO_PHY_CDR_LOCK_STATUS,
	.wait_for_cdr = exynosautov920_ufs_phy_wait_cdr_lock,
};