arch/arm/include/asm/arch-rockchip/sdram.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * Copyright (C) 2017 Rockchip Electronics Co., Ltd.
 */

#ifndef _ASM_ARCH_SDRAM_H
#define _ASM_ARCH_SDRAM_H

enum {
	DDR4 = 0,
	DDR3 = 0x3,
	LPDDR2 = 0x5,
	LPDDR3 = 0x6,
	LPDDR4 = 0x7,
	UNUSED = 0xFF
};

/*
 * sys_reg bitfield struct
 * [31]		row_3_4_ch1
 * [30]		row_3_4_ch0
 * [29:28]	chinfo
 * [27]		rank_ch1
 * [26:25]	col_ch1
 * [24]		bk_ch1
 * [23:22]	cs0_row_ch1
 * [21:20]	cs1_row_ch1
 * [19:18]	bw_ch1
 * [17:16]	dbw_ch1;
 * [15:13]	ddrtype
 * [12]		channelnum
 * [11]		rank_ch0
 * [10:9]	col_ch0
 * [8]		bk_ch0
 * [7:6]	cs0_row_ch0
 * [5:4]	cs1_row_ch0
 * [3:2]	bw_ch0
 * [1:0]	dbw_ch0
*/
#define SYS_REG_DDRTYPE_SHIFT		13
#define DDR_SYS_REG_VERSION		2
#define SYS_REG_DDRTYPE_MASK		7
#define SYS_REG_NUM_CH_SHIFT		12
#define SYS_REG_NUM_CH_MASK		1
#define SYS_REG_ROW_3_4_SHIFT(ch)	(30 + (ch))
#define SYS_REG_ROW_3_4_MASK		1
#define SYS_REG_ENC_ROW_3_4(n, ch)	((n) << (30 + (ch)))
#define SYS_REG_CHINFO_SHIFT(ch)	(28 + (ch))
#define SYS_REG_ENC_CHINFO(ch)		(1 << SYS_REG_CHINFO_SHIFT(ch))
#define SYS_REG_ENC_DDRTYPE(n)		((n) << SYS_REG_DDRTYPE_SHIFT)
#define SYS_REG_ENC_NUM_CH(n)		(((n) - SYS_REG_NUM_CH_MASK) << \
					SYS_REG_NUM_CH_SHIFT)
#define SYS_REG_RANK_SHIFT(ch)		(11 + (ch) * 16)
#define SYS_REG_RANK_MASK		1
#define SYS_REG_ENC_RANK(n, ch)		(((n) - SYS_REG_RANK_MASK) << \
					 SYS_REG_RANK_SHIFT(ch))
#define SYS_REG_COL_SHIFT(ch)		(9 + (ch) * 16)
#define SYS_REG_COL_MASK		3
#define SYS_REG_ENC_COL(n, ch)		(((n) - 9) << SYS_REG_COL_SHIFT(ch))
#define SYS_REG_BK_SHIFT(ch)		(8 + (ch) * 16)
#define SYS_REG_BK_MASK			1
#define SYS_REG_ENC_BK(n, ch)		(((n) == 3 ? 0 : 1) << \
					SYS_REG_BK_SHIFT(ch))
#define SYS_REG_CS0_ROW_SHIFT(ch)	(6 + (ch) * 16)
#define SYS_REG_CS0_ROW_MASK		3
#define SYS_REG_CS1_ROW_SHIFT(ch)	(4 + (ch) * 16)
#define SYS_REG_CS1_ROW_MASK		3
#define SYS_REG_BW_SHIFT(ch)		(2 + (ch) * 16)
#define SYS_REG_BW_MASK			3
#define SYS_REG_ENC_BW(n, ch)		((2 >> (n)) << SYS_REG_BW_SHIFT(ch))
#define SYS_REG_DBW_SHIFT(ch)		((ch) * 16)
#define SYS_REG_DBW_MASK		3
#define SYS_REG_ENC_DBW(n, ch)		((2 >> (n)) << SYS_REG_DBW_SHIFT(ch))

#define SYS_REG_ENC_VERSION(n)		((n) << 28)
#define SYS_REG_ENC_CS0_ROW(n, os_reg2, os_reg3, ch) do { \
			(os_reg2) |= (((n) - 13) & 0x3) << (6 + 16 * (ch)); \
			(os_reg3) |= ((((n) - 13) & 0x4) >> 2) << \
				     (5 + 2 * (ch)); \
		} while (0)

#define SYS_REG_ENC_CS1_ROW(n, os_reg2, os_reg3, ch) do { \
			(os_reg2) &= (~(0x3 << (4 + 16 * (ch)))); \
			(os_reg3) &= (~(0x1 << (4 + 2 * (ch)))); \
			(os_reg2) |= (((n) - 13) & 0x3) << (4 + 16 * (ch)); \
			(os_reg3) |= ((((n) - 13) & 0x4) >> 2) << \
				     (4 + 2 * (ch)); \
		} while (0)

#define SYS_REG_CS1_COL_SHIFT(ch)	(0 + 2 * (ch))
#define SYS_REG_ENC_CS1_COL(n, ch)      (((n) - 9) << SYS_REG_CS1_COL_SHIFT(ch))

/* Get sdram size decode from reg */
size_t rockchip_sdram_size(phys_addr_t reg);

/* Called by U-Boot board_init_r for Rockchip SoCs */
int dram_init(void);

#endif