diff options
Diffstat (limited to 'arch/mips/mach-mtmips/mt7628/ddr.c')
| -rw-r--r-- | arch/mips/mach-mtmips/mt7628/ddr.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/arch/mips/mach-mtmips/mt7628/ddr.c b/arch/mips/mach-mtmips/mt7628/ddr.c new file mode 100644 index 0000000000..06c0ca6854 --- /dev/null +++ b/arch/mips/mach-mtmips/mt7628/ddr.c @@ -0,0 +1,173 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020 MediaTek Inc. + * + * Author: Weijie Gao <weijie.gao@mediatek.com> + */ + +#include <common.h> +#include <asm/addrspace.h> +#include <linux/bitops.h> +#include <linux/sizes.h> +#include <linux/io.h> +#include <mach/ddr.h> +#include <mach/mc.h> +#include "mt7628.h" + +DECLARE_GLOBAL_DATA_PTR; + +/* DDR2 DQ_DLY */ +#define DDR2_DQ_DLY \ + ((0x8 << DQ1_DELAY_COARSE_TUNING_S) | \ + (0x2 << DQ1_DELAY_FINE_TUNING_S) | \ + (0x8 << DQ0_DELAY_COARSE_TUNING_S) | \ + (0x2 << DQ0_DELAY_FINE_TUNING_S)) + +/* DDR2 DQS_DLY */ +#define DDR2_DQS_DLY \ + ((0x8 << DQS1_DELAY_COARSE_TUNING_S) | \ + (0x3 << DQS1_DELAY_FINE_TUNING_S) | \ + (0x8 << DQS0_DELAY_COARSE_TUNING_S) | \ + (0x3 << DQS0_DELAY_FINE_TUNING_S)) + +const struct mc_ddr_cfg ddr1_cfgs_200mhz[] = { + [DRAM_8MB] = { 0x34A1EB94, 0x20262324, 0x28000033, 0x00000002, 0x00000000 }, + [DRAM_16MB] = { 0x34A1EB94, 0x202A2324, 0x28000033, 0x00000002, 0x00000000 }, + [DRAM_32MB] = { 0x34A1E5CA, 0x202E2324, 0x28000033, 0x00000002, 0x00000000 }, + [DRAM_64MB] = { 0x3421E5CA, 0x20322324, 0x28000033, 0x00000002, 0x00000000 }, + [DRAM_128MB] = { 0x241B05CA, 0x20362334, 0x28000033, 0x00000002, 0x00000000 }, +}; + +const struct mc_ddr_cfg ddr1_cfgs_160mhz[] = { + [DRAM_8MB] = { 0x239964A1, 0x20262323, 0x00000033, 0x00000002, 0x00000000 }, + [DRAM_16MB] = { 0x239964A1, 0x202A2323, 0x00000033, 0x00000002, 0x00000000 }, + [DRAM_32MB] = { 0x239964A1, 0x202E2323, 0x00000033, 0x00000002, 0x00000000 }, + [DRAM_64MB] = { 0x239984A1, 0x20322323, 0x00000033, 0x00000002, 0x00000000 }, + [DRAM_128MB] = { 0x239AB4A1, 0x20362333, 0x00000033, 0x00000002, 0x00000000 }, +}; + +const struct mc_ddr_cfg ddr2_cfgs_200mhz[] = { + [DRAM_32MB] = { 0x2519E2E5, 0x222E2323, 0x68000C43, 0x00000452, 0x0000000A }, + [DRAM_64MB] = { 0x249AA2E5, 0x22322323, 0x68000C43, 0x00000452, 0x0000000A }, + [DRAM_128MB] = { 0x249B42E5, 0x22362323, 0x68000C43, 0x00000452, 0x0000000A }, + [DRAM_256MB] = { 0x249CE2E5, 0x223A2323, 0x68000C43, 0x00000452, 0x0000000A }, +}; + +const struct mc_ddr_cfg ddr2_cfgs_160mhz[] = { + [DRAM_32MB] = { 0x23918250, 0x222E2322, 0x40000A43, 0x00000452, 0x00000006 }, + [DRAM_64MB] = { 0x239A2250, 0x22322322, 0x40000A43, 0x00000452, 0x00000008 }, + [DRAM_128MB] = { 0x2392A250, 0x22362322, 0x40000A43, 0x00000452, 0x00000008 }, + [DRAM_256MB] = { 0x24140250, 0x223A2322, 0x40000A43, 0x00000452, 0x00000008 }, +}; + +static void mt7628_memc_reset(int assert) +{ + void __iomem *sysc = ioremap_nocache(SYSCTL_BASE, SYSCTL_SIZE); + + if (assert) + setbits_32(sysc + SYSCTL_RSTCTL_REG, MC_RST); + else + clrbits_32(sysc + SYSCTL_RSTCTL_REG, MC_RST); +} + +static void mt7628_ddr_pad_ldo_config(int ddr_type, int pkg_type) +{ + void __iomem *rgc = ioremap_nocache(RGCTL_BASE, RGCTL_SIZE); + u32 ck_pad1, cmd_pad1, dq_pad0, dq_pad1, dqs_pad0, dqs_pad1; + + setbits_32(rgc + RGCTL_PMU_G0_REG, PMU_CFG_EN); + + if (ddr_type == DRAM_DDR1) + setbits_32(rgc + RGCTL_PMU_G3_REG, RG_DDRLDO_VOSEL); + else + clrbits_32(rgc + RGCTL_PMU_G3_REG, RG_DDRLDO_VOSEL); + + setbits_32(rgc + RGCTL_PMU_G3_REG, NI_DDRLDO_EN); + + __udelay(250 * 50); + + setbits_32(rgc + RGCTL_PMU_G3_REG, NI_DDRLDO_STB); + setbits_32(rgc + RGCTL_PMU_G1_REG, RG_BUCK_FPWM); + + ck_pad1 = readl(rgc + RGCTL_DDR_PAD_CK_G1_REG); + cmd_pad1 = readl(rgc + RGCTL_DDR_PAD_CMD_G1_REG); + dq_pad0 = readl(rgc + RGCTL_DDR_PAD_DQ_G0_REG); + dq_pad1 = readl(rgc + RGCTL_DDR_PAD_DQ_G1_REG); + dqs_pad0 = readl(rgc + RGCTL_DDR_PAD_DQS_G0_REG); + dqs_pad1 = readl(rgc + RGCTL_DDR_PAD_DQS_G1_REG); + + ck_pad1 &= ~(DRVP_M | DRVN_M); + cmd_pad1 &= ~(DRVP_M | DRVN_M); + dq_pad0 &= ~RTT_M; + dq_pad1 &= ~(DRVP_M | DRVN_M); + dqs_pad0 &= ~RTT_M; + dqs_pad1 &= ~(DRVP_M | DRVN_M); + + if (pkg_type == PKG_ID_KN) { + ck_pad1 |= (3 << DRVP_S) | (3 << DRVN_S); + cmd_pad1 |= (3 << DRVP_S) | (3 << DRVN_S); + dq_pad1 |= (3 << DRVP_S) | (3 << DRVN_S); + dqs_pad1 |= (3 << DRVP_S) | (3 << DRVN_S); + } else { + ck_pad1 |= (12 << DRVP_S) | (12 << DRVN_S); + cmd_pad1 |= (2 << DRVP_S) | (2 << DRVN_S); + dqs_pad1 |= (12 << DRVP_S) | (12 << DRVN_S); + if (ddr_type == DRAM_DDR1) + dq_pad1 |= (7 << DRVP_S) | (7 << DRVN_S); + else + dq_pad1 |= (4 << DRVP_S) | (4 << DRVN_S); + } + + writel(ck_pad1, rgc + RGCTL_DDR_PAD_CK_G1_REG); + writel(cmd_pad1, rgc + RGCTL_DDR_PAD_CMD_G1_REG); + writel(dq_pad0, rgc + RGCTL_DDR_PAD_DQ_G0_REG); + writel(dq_pad1, rgc + RGCTL_DDR_PAD_DQ_G1_REG); + writel(dqs_pad0, rgc + RGCTL_DDR_PAD_DQS_G0_REG); + writel(dqs_pad1, rgc + RGCTL_DDR_PAD_DQS_G1_REG); +} + +void mt7628_ddr_init(void) +{ + void __iomem *sysc; + int ddr_type, pkg_type, lspd; + struct mc_ddr_init_param param; + + sysc = ioremap_nocache(SYSCTL_BASE, SYSCTL_SIZE); + ddr_type = readl(sysc + SYSCTL_SYSCFG0_REG) & DRAM_TYPE; + pkg_type = !!(readl(sysc + SYSCTL_CHIP_REV_ID_REG) & PKG_ID); + lspd = readl(sysc + SYSCTL_CLKCFG0_REG) & + (CPU_PLL_FROM_BBP | CPU_PLL_FROM_XTAL); + + mt7628_memc_reset(1); + __udelay(200); + + mt7628_ddr_pad_ldo_config(ddr_type, pkg_type); + + param.memc = ioremap_nocache(MEMCTL_BASE, MEMCTL_SIZE); + param.dq_dly = DDR2_DQ_DLY; + param.dqs_dly = DDR2_DQS_DLY; + param.mc_reset = mt7628_memc_reset; + param.memsize = 0; + param.bus_width = 0; + + if (pkg_type == PKG_ID_KN) + ddr_type = DRAM_DDR1; + + if (ddr_type == DRAM_DDR1) { + if (lspd) + param.cfgs = ddr1_cfgs_160mhz; + else + param.cfgs = ddr1_cfgs_200mhz; + ddr1_init(¶m); + } else { + if (lspd) + param.cfgs = ddr2_cfgs_160mhz; + else + param.cfgs = ddr2_cfgs_200mhz; + ddr2_init(¶m); + } + + ddr_calibrate(param.memc, param.memsize, param.bus_width); + + gd->ram_size = param.memsize; +} |