arm-trusted-firmware/include/drivers/cadence/cdns_combo_phy.h

/*
 * Copyright (c) 2022-2023, Intel Corporation. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#ifndef CDN_COMBOPHY_H
#define CDN_COMBOPHY_H

/* SRS */
#define SDMMC_CDN_SRS02			0x8
#define SDMMC_CDN_SRS03			0xC
#define SDMMC_CDN_SRS04			0x10
#define SDMMC_CDN_SRS05			0x14
#define SDMMC_CDN_SRS06			0x18
#define SDMMC_CDN_SRS07			0x1C
#define SDMMC_CDN_SRS09			0x24
#define SDMMC_CDN_SRS10			0x28
#define SDMMC_CDN_SRS11			0x2C
#define SDMMC_CDN_SRS12			0x30
#define SDMMC_CDN_SRS13			0x34
#define SDMMC_CDN_SRS14			0x38

/* SRS03 */
/* Response Type Select
 * Defines the expected response length.
 */
#define SDMMC_CDN_RTS				16

/* Command CRC Check Enable
 * When set to 1, the host checks if the CRC field of the response is valid.
 * When 0, the CRC check is disabled and the CRC field of the response is ignored.
 */
#define SDMMC_CDN_CRCCE				19

/* Command Index
 * This field contains a command number (index) of the command to be sent.
 */
#define SDMMC_CDN_CIDX				24

/* SRS09 */
/* Card Inserted
 * Indicates if the card is inserted inside the slot.
 */
#define SDMMC_CDN_CI				16

/* SRS10 */
/* Data Transfer Width
 * Bit used to configure DAT bus width to 1 or 4.
 */
#define SDMMC_CDN_DTW				1

/* Extended Data Transfer Width
 * This bit is to enable/disable 8-bit DAT bus width mode.
 */
#define SDMMC_CDN_EDTW				5

/* SD Bus Power for VDD1
 * When set to 1, the VDD1 voltage is supplied to card/device.
 */
#define SDMMC_CDN_BP				8

/* SD Bus Voltage Select
 * This field is used to configure VDD1 voltage level.
 */
#define SDMMC_CDN_BVS				9

/* SRS11 */
/* Internal Clock Enable
 * This field is designated to controls (enable/disable) external clock generator.
 */
#define SDMMC_CDN_ICE				0

/* Internal Clock Stable
 * When 1, indicates that the clock on sdmclk pin of the host is stable.
 * When 0, indicates that the clock is not stable .
 */
#define SDMMC_CDN_ICS				1

/* SD Clock Enable
 * When set, SDCLK clock is enabled.
 * When clear, SDCLK clock is stopped.
 */
#define SDMMC_CDN_SDCE				2

/* USDCLK Frequency Select
 * This is used to calculate frequency of USDCLK clock.
 */
#define SDMMC_CDN_USDCLKFS			6

/* SDCLK Frequency Select
 * This is used to calculate frequency of SDCLK clock.
 */
#define SDMMC_CDN_SDCLKFS				8

/* Data Timeout Counter Value
 * This value determines the interval by which DAT line timeouts are detected
 */
#define SDMMC_CDN_DTCV				16

/* SRS12 */
/* Command Complete
 * Generated when the end bit of the response is received.
 */
#define SDMMC_CDN_CC				0

/* Transfer Complete
 * Generated when the transfer which uses the DAT line is complete.
 */
#define SDMMC_CDN_TC				1

/* Error Interrupt
 * The software can check for an error by reading this single bit first.
 */
#define SDMMC_CDN_EINT				15

/* SRS14 */
/* Command Complete Interrupt Enable */
#define SDMMC_CDN_CC_IE				0

/* Transfer Complete Interrupt Enable */
#define SDMMC_CDN_TC_IE				1

/* DMA Interrupt Enable */
#define SDMMC_CDN_DMAINT_IE			3

/* Combo PHY DLL registers */
#define CP_DLL_REG_BASE			(0x10B92000)
#define CP_DLL_DQ_TIMING_REG		(0x00)
#define CP_DLL_DQS_TIMING_REG		(0x04)
#define CP_DLL_GATE_LPBK_CTRL_REG	(0x08)
#define CP_DLL_MASTER_CTRL_REG		(0x0C)
#define CP_DLL_SLAVE_CTRL_REG		(0x10)
#define CP_DLL_IE_TIMING_REG		(0x14)

#define CP_DQ_TIMING_REG_SDR		(0x00000002)
#define CP_DQS_TIMING_REG_SDR		(0x00100004)
#define CP_GATE_LPBK_CTRL_REG_SDR	(0x00D80000)
#define CP_DLL_MASTER_CTRL_REG_SDR	(0x00800000)
#define CP_DLL_SLAVE_CTRL_REG_SDR	(0x00000000)

#define CP_DLL(_reg)			(CP_DLL_REG_BASE \
					+ (CP_DLL_##_reg))

/* Control Timing Block registers */
#define CP_CTB_REG_BASE			(0x10B92080)
#define CP_CTB_CTRL_REG			(0x00)
#define CP_CTB_TSEL_REG			(0x04)
#define CP_CTB_GPIO_CTRL0		(0x08)
#define CP_CTB_GPIO_CTRL1		(0x0C)
#define CP_CTB_GPIO_STATUS0		(0x10)
#define CP_CTB_GPIO_STATUS1		(0x14)

#define CP_CTRL_REG_SDR			(0x00004040)
#define CP_TSEL_REG_SDR			(0x00000000)

#define CP_CTB(_reg)			(CP_CTB_REG_BASE \
					+ (CP_CTB_##_reg))

/* Combo PHY */
#define SDMMC_CDN_REG_BASE		0x10808200
#define PHY_DQ_TIMING_REG		0x2000
#define PHY_DQS_TIMING_REG		0x2004
#define PHY_GATE_LPBK_CTRL_REG		0x2008
#define PHY_DLL_MASTER_CTRL_REG		0x200C
#define PHY_DLL_SLAVE_CTRL_REG		0x2010
#define PHY_CTRL_REG			0x2080
#define PHY_REG_ADDR_MASK		0xFFFF
#define PHY_REG_DATA_MASK		0xFFFFFFFF

/* PHY_DQS_TIMING_REG */
#define CP_USE_EXT_LPBK_DQS(x)		((x) << 22) //0x1
#define CP_USE_LPBK_DQS(x)		((x) << 21) //0x1
#define CP_USE_PHONY_DQS(x)		((x) << 20) //0x1
#define CP_USE_PHONY_DQS_CMD(x)		((x) << 19) //0x1

/* PHY_GATE_LPBK_CTRL_REG */
#define CP_SYNC_METHOD(x)		((x) << 31) //0x1
#define CP_SW_HALF_CYCLE_SHIFT(x)	((x) << 28) //0x1
#define CP_RD_DEL_SEL(x)		((x) << 19) //0x3f
#define CP_UNDERRUN_SUPPRESS(x)		((x) << 18) //0x1
#define CP_GATE_CFG_ALWAYS_ON(x)	((x) << 6) //0x1

/* PHY_DLL_MASTER_CTRL_REG */
#define CP_DLL_BYPASS_MODE(x)		((x) << 23) //0x1
#define CP_DLL_START_POINT(x)		((x) << 0) //0xff

/* PHY_DLL_SLAVE_CTRL_REG */
#define CP_READ_DQS_CMD_DELAY(x)	((x) << 24) //0xff
#define CP_CLK_WRDQS_DELAY(x)		((x) << 16) //0xff
#define CP_CLK_WR_DELAY(x)		((x) << 8) //0xff
#define CP_READ_DQS_DELAY(x)		((x) << 0) //0xff

/* PHY_DQ_TIMING_REG */
#define CP_IO_MASK_ALWAYS_ON(x)		((x) << 31) //0x1
#define CP_IO_MASK_END(x)		((x) << 27) //0x7
#define CP_IO_MASK_START(x)		((x) << 24) //0x7
#define CP_DATA_SELECT_OE_END(x)	((x) << 0) //0x7

/* PHY_CTRL_REG */
#define CP_PHONY_DQS_TIMING_MASK	0x3F
#define CP_PHONY_DQS_TIMING_SHIFT	4

/* Shared Macros */
#define SDMMC_CDN(_reg)			(SDMMC_CDN_REG_BASE + \
					(SDMMC_CDN_##_reg))

struct cdns_sdmmc_combo_phy {
	uint32_t	cp_clk_wr_delay;
	uint32_t	cp_clk_wrdqs_delay;
	uint32_t	cp_data_select_oe_end;
	uint32_t	cp_dll_bypass_mode;
	uint32_t	cp_dll_locked_mode;
	uint32_t	cp_dll_start_point;
	uint32_t	cp_gate_cfg_always_on;
	uint32_t	cp_io_mask_always_on;
	uint32_t	cp_io_mask_end;
	uint32_t	cp_io_mask_start;
	uint32_t	cp_rd_del_sel;
	uint32_t	cp_read_dqs_cmd_delay;
	uint32_t	cp_read_dqs_delay;
	uint32_t	cp_sw_half_cycle_shift;
	uint32_t	cp_sync_method;
	uint32_t	cp_underrun_suppress;
	uint32_t	cp_use_ext_lpbk_dqs;
	uint32_t	cp_use_lpbk_dqs;
	uint32_t	cp_use_phony_dqs;
	uint32_t	cp_use_phony_dqs_cmd;
};

/* Function Prototype */

int cdns_sdmmc_write_phy_reg(uint32_t phy_reg_addr, uint32_t phy_reg_addr_value,
			uint32_t phy_reg_data, uint32_t phy_reg_data_value);
int cdns_sd_card_detect(void);
int cdns_emmc_card_reset(void);

#endif