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path: root/src/drivers/generic/bayhub/bh720.h
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/*
 * Driver for BayHub Technology BH720 PCI to eMMC 5.0 HS200 bridge
 *
 * This file is part of the coreboot project.
 *
 * Copyright 2018 Google LLC.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

enum {
	BH720_PROTECT                   = 0xd0,
	BH720_PROTECT_LOCK_OFF          = 0,
	BH720_PROTECT_LOCK_ON           = BIT(0),
	BH720_PROTECT_OFF               = 0,
	BH720_PROTECT_ON                = BIT(31),

	BH720_LINK_CTRL                 = 0x90,
	BH720_LINK_CTRL_L0_ENABLE       = BIT(0),
	BH720_LINK_CTRL_L1_ENABLE       = BIT(1),
	BH720_LINK_CTRL_CLKREQ          = BIT(8),

	BH720_MISC2                     = 0xf0,
	BH720_MISC2_ASPM_DISABLE        = BIT(0),
	BH720_MISC2_APSM_CLKREQ_L1      = BIT(7),
	BH720_MISC2_APSM_PHY_L1         = BIT(10),
	BH720_MISC2_APSM_MORE           = BIT(12),

	BH720_MEM_RW_DATA               = 0x200,
	BH720_MEM_RW_ADR                = 0x204,
	BH720_MEM_ACCESS_EN             = 0x208,
	BH720_PCR                       = 0x304,
	BH720_PCR_DATA_CMD_DRV_MAX      = 7,
	BH720_PCR_CLK_DRV_MAX           = 7,

	BH720_RTD3_L1                   = 0x3e0,
	BH720_RTD3_L1_DISABLE_L1        = BIT(28),
};

void bh720_driving_strength(struct device *dev);