There are some function like os_reg setting, capacity detect functions, can be used as common code for different Rockchip SoCs, add a sdram_common.c for all these functions.
Signed-off-by: YouMin Chen cym@rock-chips.com Signed-off-by: Kever Yang kever.yang@rock-chips.com ---
Changes in v2: None
.../include/asm/arch-rockchip/sdram_common.h | 31 ++ drivers/ram/rockchip/Kconfig | 6 + drivers/ram/rockchip/Makefile | 2 +- drivers/ram/rockchip/sdram_common.c | 285 ++++++++++++++++++ 4 files changed, 323 insertions(+), 1 deletion(-) create mode 100644 drivers/ram/rockchip/sdram_common.c
diff --git a/arch/arm/include/asm/arch-rockchip/sdram_common.h b/arch/arm/include/asm/arch-rockchip/sdram_common.h index cd3d7f97d8..36d31156be 100644 --- a/arch/arm/include/asm/arch-rockchip/sdram_common.h +++ b/arch/arm/include/asm/arch-rockchip/sdram_common.h @@ -6,6 +6,15 @@ #ifndef _ASM_ARCH_SDRAM_COMMON_H #define _ASM_ARCH_SDRAM_COMMON_H
+#ifndef MHZ +#define MHZ (1000 * 1000) +#endif + +#define PATTERN (0x5aa5f00f) + +#define MIN(a, b) (((a) > (b)) ? (b) : (a)) +#define MAX(a, b) (((a) > (b)) ? (a) : (b)) + struct sdram_cap_info { unsigned int rank; /* dram column number, 0 means this channel is invalid */ @@ -125,4 +134,26 @@ void sdram_print_ddr_info(struct sdram_cap_info *cap_info, void sdram_print_stride(unsigned int stride); #endif /* CONFIG_RAM_ROCKCHIP_DEBUG */
+void sdram_org_config(struct sdram_cap_info *cap_info, + struct sdram_base_params *base, + u32 *p_os_reg2, u32 *p_os_reg3, u32 channel); + +int sdram_detect_bw(struct sdram_cap_info *cap_info); +int sdram_detect_cs(struct sdram_cap_info *cap_info); +int sdram_detect_col(struct sdram_cap_info *cap_info, + u32 coltmp); +int sdram_detect_bank(struct sdram_cap_info *cap_info, + u32 coltmp, u32 bktmp); +int sdram_detect_bg(struct sdram_cap_info *cap_info, + u32 coltmp); +int sdram_detect_dbw(struct sdram_cap_info *cap_info, u32 dram_type); +int sdram_detect_row(struct sdram_cap_info *cap_info, + u32 coltmp, u32 bktmp, u32 rowtmp); +int sdram_detect_row_3_4(struct sdram_cap_info *cap_info, + u32 coltmp, u32 bktmp); +int sdram_detect_high_row(struct sdram_cap_info *cap_info); +int sdram_detect_cs1_row(struct sdram_cap_info *cap_info, u32 dram_type); +u64 sdram_get_cs_cap(struct sdram_cap_info *cap_info, u32 cs, u32 dram_type); +void sdram_copy_to_reg(u32 *dest, const u32 *src, u32 n); + #endif diff --git a/drivers/ram/rockchip/Kconfig b/drivers/ram/rockchip/Kconfig index 4f274e01b3..dcc06b3fd3 100644 --- a/drivers/ram/rockchip/Kconfig +++ b/drivers/ram/rockchip/Kconfig @@ -5,6 +5,12 @@ config RAM_ROCKCHIP help This enables support for ram drivers Rockchip SoCs.
+config ROCKCHIP_SDRAM_COMMON + bool "Enable rockchip sdram common driver" + depends on TPL_RAM || SPL_RAM + help + This enable sdram common driver + if RAM_ROCKCHIP
config RAM_ROCKCHIP_DEBUG diff --git a/drivers/ram/rockchip/Makefile b/drivers/ram/rockchip/Makefile index feb1f82d00..3d4f2f4ebf 100644 --- a/drivers/ram/rockchip/Makefile +++ b/drivers/ram/rockchip/Makefile @@ -2,7 +2,7 @@ # # Copyright (c) 2017 Theobroma Systems Design und Consulting GmbH # - +obj-$(CONFIG_ROCKCHIP_SDRAM_COMMON) += sdram_common.o obj-$(CONFIG_RAM_ROCKCHIP_DEBUG) += sdram_debug.o obj-$(CONFIG_ROCKCHIP_RK3368) = dmc-rk3368.o obj-$(CONFIG_ROCKCHIP_RK3128) = sdram_rk3128.o diff --git a/drivers/ram/rockchip/sdram_common.c b/drivers/ram/rockchip/sdram_common.c new file mode 100644 index 0000000000..3f0e1d9a42 --- /dev/null +++ b/drivers/ram/rockchip/sdram_common.c @@ -0,0 +1,285 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * (C) Copyright 2018 Rockchip Electronics Co., Ltd. + */ + +#include <common.h> +#include <debug_uart.h> +#include <ram.h> +#include <asm/io.h> +#include <asm/arch-rockchip/sdram.h> +#include <asm/arch-rockchip/sdram_common.h> + +/* n: Unit bytes */ +void sdram_copy_to_reg(u32 *dest, const u32 *src, u32 n) +{ + int i; + + for (i = 0; i < n / sizeof(u32); i++) { + writel(*src, dest); + src++; + dest++; + } +} + +void sdram_org_config(struct sdram_cap_info *cap_info, + struct sdram_base_params *base, + u32 *p_os_reg2, u32 *p_os_reg3, u32 channel) +{ + *p_os_reg2 |= SYS_REG_ENC_DDRTYPE(base->dramtype); + *p_os_reg2 |= SYS_REG_ENC_NUM_CH(base->num_channels); + + *p_os_reg2 |= SYS_REG_ENC_ROW_3_4(cap_info->row_3_4, channel); + *p_os_reg2 |= SYS_REG_ENC_CHINFO(channel); + *p_os_reg2 |= SYS_REG_ENC_RANK(cap_info->rank, channel); + *p_os_reg2 |= SYS_REG_ENC_COL(cap_info->col, channel); + *p_os_reg2 |= SYS_REG_ENC_BK(cap_info->bk, channel); + *p_os_reg2 |= SYS_REG_ENC_BW(cap_info->bw, channel); + *p_os_reg2 |= SYS_REG_ENC_DBW(cap_info->dbw, channel); + + SYS_REG_ENC_CS0_ROW(cap_info->cs0_row, *p_os_reg2, *p_os_reg3, channel); + if (cap_info->cs1_row) + SYS_REG_ENC_CS1_ROW(cap_info->cs1_row, *p_os_reg2, + *p_os_reg3, channel); + *p_os_reg3 |= SYS_REG_ENC_CS1_COL(cap_info->col, channel); + *p_os_reg3 |= SYS_REG_ENC_VERSION(DDR_SYS_REG_VERSION); +} + +int sdram_detect_bw(struct sdram_cap_info *cap_info) +{ + return 0; +} + +int sdram_detect_cs(struct sdram_cap_info *cap_info) +{ + return 0; +} + +int sdram_detect_col(struct sdram_cap_info *cap_info, + u32 coltmp) +{ + void __iomem *test_addr; + u32 col; + u32 bw = cap_info->bw; + + for (col = coltmp; col >= 9; col -= 1) { + writel(0, CONFIG_SYS_SDRAM_BASE); + test_addr = (void __iomem *)(CONFIG_SYS_SDRAM_BASE + + (1ul << (col + bw - 1ul))); + writel(PATTERN, test_addr); + if ((readl(test_addr) == PATTERN) && + (readl(CONFIG_SYS_SDRAM_BASE) == 0)) + break; + } + if (col == 8) { + printascii("col error\n"); + return -1; + } + + cap_info->col = col; + + return 0; +} + +int sdram_detect_bank(struct sdram_cap_info *cap_info, + u32 coltmp, u32 bktmp) +{ + void __iomem *test_addr; + u32 bk; + u32 bw = cap_info->bw; + + test_addr = (void __iomem *)(CONFIG_SYS_SDRAM_BASE + + (1ul << (coltmp + bktmp + bw - 1ul))); + writel(0, CONFIG_SYS_SDRAM_BASE); + writel(PATTERN, test_addr); + if ((readl(test_addr) == PATTERN) && + (readl(CONFIG_SYS_SDRAM_BASE) == 0)) + bk = 3; + else + bk = 2; + + cap_info->bk = bk; + + return 0; +} + +/* detect bg for ddr4 */ +int sdram_detect_bg(struct sdram_cap_info *cap_info, + u32 coltmp) +{ + void __iomem *test_addr; + u32 dbw; + u32 bw = cap_info->bw; + + test_addr = (void __iomem *)(CONFIG_SYS_SDRAM_BASE + + (1ul << (coltmp + bw + 1ul))); + writel(0, CONFIG_SYS_SDRAM_BASE); + writel(PATTERN, test_addr); + if ((readl(test_addr) == PATTERN) && + (readl(CONFIG_SYS_SDRAM_BASE) == 0)) + dbw = 0; + else + dbw = 1; + + cap_info->dbw = dbw; + + return 0; +} + +/* detect dbw for ddr3,lpddr2,lpddr3,lpddr4 */ +int sdram_detect_dbw(struct sdram_cap_info *cap_info, u32 dram_type) +{ + u32 row, col, bk, bw, cs_cap, cs; + u32 die_bw_0 = 0, die_bw_1 = 0; + + if (dram_type == DDR3 || dram_type == LPDDR4) { + cap_info->dbw = 1; + } else if (dram_type == LPDDR3 || dram_type == LPDDR2) { + row = cap_info->cs0_row; + col = cap_info->col; + bk = cap_info->bk; + cs = cap_info->rank; + bw = cap_info->bw; + cs_cap = (1 << (row + col + bk + bw - 20)); + if (bw == 2) { + if (cs_cap <= 0x2000000) /* 256Mb */ + die_bw_0 = (col < 9) ? 2 : 1; + else if (cs_cap <= 0x10000000) /* 2Gb */ + die_bw_0 = (col < 10) ? 2 : 1; + else if (cs_cap <= 0x40000000) /* 8Gb */ + die_bw_0 = (col < 11) ? 2 : 1; + else + die_bw_0 = (col < 12) ? 2 : 1; + if (cs > 1) { + row = cap_info->cs1_row; + cs_cap = (1 << (row + col + bk + bw - 20)); + if (cs_cap <= 0x2000000) /* 256Mb */ + die_bw_0 = (col < 9) ? 2 : 1; + else if (cs_cap <= 0x10000000) /* 2Gb */ + die_bw_0 = (col < 10) ? 2 : 1; + else if (cs_cap <= 0x40000000) /* 8Gb */ + die_bw_0 = (col < 11) ? 2 : 1; + else + die_bw_0 = (col < 12) ? 2 : 1; + } + } else { + die_bw_1 = 1; + die_bw_0 = 1; + } + cap_info->dbw = (die_bw_0 > die_bw_1) ? die_bw_0 : die_bw_1; + } + + return 0; +} + +int sdram_detect_row(struct sdram_cap_info *cap_info, + u32 coltmp, u32 bktmp, u32 rowtmp) +{ + u32 row; + u32 bw = cap_info->bw; + void __iomem *test_addr; + + for (row = rowtmp; row > 12; row--) { + writel(0, CONFIG_SYS_SDRAM_BASE); + test_addr = (void __iomem *)(CONFIG_SYS_SDRAM_BASE + + (1ul << (row + bktmp + coltmp + bw - 1ul))); + writel(PATTERN, test_addr); + if ((readl(test_addr) == PATTERN) && + (readl(CONFIG_SYS_SDRAM_BASE) == 0)) + break; + } + if (row == 12) { + printascii("row error"); + return -1; + } + + cap_info->cs0_row = row; + + return 0; +} + +int sdram_detect_row_3_4(struct sdram_cap_info *cap_info, + u32 coltmp, u32 bktmp) +{ + u32 row_3_4; + u32 bw = cap_info->bw; + u32 row = cap_info->cs0_row; + void __iomem *test_addr, *test_addr1; + + test_addr = CONFIG_SYS_SDRAM_BASE; + test_addr1 = (void __iomem *)(CONFIG_SYS_SDRAM_BASE + + (0x3ul << (row + bktmp + coltmp + bw - 1ul - 1ul))); + + writel(0, test_addr); + writel(PATTERN, test_addr1); + if ((readl(test_addr) == 0) && (readl(test_addr1) == PATTERN)) + row_3_4 = 0; + else + row_3_4 = 1; + + cap_info->row_3_4 = row_3_4; + + return 0; +} + +int sdram_detect_high_row(struct sdram_cap_info *cap_info) +{ + cap_info->cs0_high16bit_row = cap_info->cs0_row; + cap_info->cs1_high16bit_row = cap_info->cs1_row; + + return 0; +} + +int sdram_detect_cs1_row(struct sdram_cap_info *cap_info, u32 dram_type) +{ + void __iomem *test_addr; + u32 row = 0, bktmp, coltmp, bw; + ulong cs0_cap; + u32 byte_mask; + + if (cap_info->rank == 2) { + cs0_cap = sdram_get_cs_cap(cap_info, 0, dram_type); + + if (dram_type == DDR4) { + if (cap_info->dbw == 0) + bktmp = cap_info->bk + 2; + else + bktmp = cap_info->bk + 1; + } else { + bktmp = cap_info->bk; + } + bw = cap_info->bw; + coltmp = cap_info->col; + + /* + * because px30 support axi split,min bandwidth + * is 8bit. if cs0 is 32bit, cs1 may 32bit or 16bit + * so we check low 16bit data when detect cs1 row. + * if cs0 is 16bit/8bit, we check low 8bit data. + */ + if (bw == 2) + byte_mask = 0xFFFF; + else + byte_mask = 0xFF; + + /* detect cs1 row */ + for (row = cap_info->cs0_row; row > 12; row--) { + test_addr = (void __iomem *)(CONFIG_SYS_SDRAM_BASE + + cs0_cap + + (1ul << (row + bktmp + coltmp + bw - 1ul))); + writel(0, CONFIG_SYS_SDRAM_BASE + cs0_cap); + writel(PATTERN, test_addr); + + if (((readl(test_addr) & byte_mask) == + (PATTERN & byte_mask)) && + ((readl(CONFIG_SYS_SDRAM_BASE + cs0_cap) & + byte_mask) == 0)) { + break; + } + } + } + + cap_info->cs1_row = row; + + return 0; +}