diff options
Diffstat (limited to 'arch/arm/mach-uniphier/dram/umc-pro4.c')
| -rw-r--r-- | arch/arm/mach-uniphier/dram/umc-pro4.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/dram/umc-pro4.c b/arch/arm/mach-uniphier/dram/umc-pro4.c new file mode 100644 index 0000000000..23fb7b9f53 --- /dev/null +++ b/arch/arm/mach-uniphier/dram/umc-pro4.c @@ -0,0 +1,186 @@ +/* + * Copyright (C) 2011-2015 Masahiro Yamada <yamada.masahiro@socionext.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/sizes.h> +#include <asm/processor.h> + +#include "../init.h" +#include "ddrphy-regs.h" +#include "umc-regs.h" + +#define DRAM_CH_NR 2 + +enum dram_size { + DRAM_SZ_128M, + DRAM_SZ_256M, + DRAM_SZ_512M, + DRAM_SZ_NR, +}; + +static u32 umc_spcctla[DRAM_SZ_NR] = {0x002b0617, 0x003f0617, 0x00770617}; + +static void umc_start_ssif(void __iomem *ssif_base) +{ + writel(0x00000000, ssif_base + 0x0000b004); + writel(0xffffffff, ssif_base + 0x0000c004); + writel(0x000fffcf, ssif_base + 0x0000c008); + writel(0x00000001, ssif_base + 0x0000b000); + writel(0x00000001, ssif_base + 0x0000c000); + + writel(0x03010100, ssif_base + UMC_HDMCHSEL); + writel(0x03010101, ssif_base + UMC_MDMCHSEL); + writel(0x03010100, ssif_base + UMC_DVCCHSEL); + writel(0x03010100, ssif_base + UMC_DMDCHSEL); + + writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_FETCH); + writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMQUE0); + writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMWC0); + writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMRC0); + writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMQUE1); + writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMWC1); + writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_COMRC1); + writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_WC); + writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_RC); + writel(0x00000000, ssif_base + UMC_CLKEN_SSIF_DST); + writel(0x00000000, ssif_base + 0x0000c044); /* DCGIV_SSIF_REG */ + + writel(0x00000001, ssif_base + UMC_CPURST); + writel(0x00000001, ssif_base + UMC_IDSRST); + writel(0x00000001, ssif_base + UMC_IXMRST); + writel(0x00000001, ssif_base + UMC_HDMRST); + writel(0x00000001, ssif_base + UMC_MDMRST); + writel(0x00000001, ssif_base + UMC_HDDRST); + writel(0x00000001, ssif_base + UMC_MDDRST); + writel(0x00000001, ssif_base + UMC_SIORST); + writel(0x00000001, ssif_base + UMC_GIORST); + writel(0x00000001, ssif_base + UMC_HD2RST); + writel(0x00000001, ssif_base + UMC_VIORST); + writel(0x00000001, ssif_base + UMC_DVCRST); + writel(0x00000001, ssif_base + UMC_RGLRST); + writel(0x00000001, ssif_base + UMC_VPERST); + writel(0x00000001, ssif_base + UMC_AIORST); + writel(0x00000001, ssif_base + UMC_DMDRST); +} + +static int umc_dramcont_init(void __iomem *dc_base, void __iomem *ca_base, + int freq, unsigned long size, bool ddr3plus) +{ + enum dram_size size_e; + + if (freq != 1600) { + pr_err("Unsupported DDR frequency %d MHz\n", freq); + return -EINVAL; + } + + if (ddr3plus) { + pr_err("DDR3+ is not supported\n"); + return -EINVAL; + } + + switch (size) { + case SZ_128M: + size_e = DRAM_SZ_128M; + break; + case SZ_256M: + size_e = DRAM_SZ_256M; + break; + case SZ_512M: + size_e = DRAM_SZ_512M; + break; + default: + pr_err("unsupported DRAM size 0x%08lx (per 16bit)\n", size); + return -EINVAL; + } + + writel(0x66bb0f17, dc_base + UMC_CMDCTLA); + writel(0x18c6aa44, dc_base + UMC_CMDCTLB); + writel(umc_spcctla[size_e], dc_base + UMC_SPCCTLA); + writel(0x00ff0008, dc_base + UMC_SPCCTLB); + writel(0x000c00ae, dc_base + UMC_RDATACTL_D0); + writel(0x000c00ae, dc_base + UMC_RDATACTL_D1); + writel(0x04060802, dc_base + UMC_WDATACTL_D0); + writel(0x04060802, dc_base + UMC_WDATACTL_D1); + writel(0x04a02000, dc_base + UMC_DATASET); + writel(0x00000000, ca_base + 0x2300); + writel(0x00400020, dc_base + UMC_DCCGCTL); + writel(0x0000000f, dc_base + 0x7000); + writel(0x0000000f, dc_base + 0x8000); + writel(0x000000c3, dc_base + 0x8004); + writel(0x00000071, dc_base + 0x8008); + writel(0x00000004, dc_base + UMC_FLOWCTLG); + writel(0x00000000, dc_base + 0x0060); + writel(0x80000201, ca_base + 0xc20); + writel(0x0801e01e, dc_base + UMC_FLOWCTLA); + writel(0x00200000, dc_base + UMC_FLOWCTLB); + writel(0x00004444, dc_base + UMC_FLOWCTLC); + writel(0x200a0a00, dc_base + UMC_SPCSETB); + writel(0x00010000, dc_base + UMC_SPCSETD); + writel(0x80000020, dc_base + UMC_DFICUPDCTLA); + + return 0; +} + +static int umc_ch_init(void __iomem *dc_base, void __iomem *ca_base, + int freq, unsigned long size, unsigned int width, + bool ddr3plus) +{ + void __iomem *phy_base = dc_base + 0x00001000; + int nr_phy = width / 16; + int phy, ret; + + writel(UMC_INITSET_INIT1EN, dc_base + UMC_INITSET); + while (readl(dc_base + UMC_INITSET) & UMC_INITSTAT_INIT1ST) + cpu_relax(); + + for (phy = 0; phy < nr_phy; phy++) { + writel(0x00000100 | ((1 << (phy + 1)) - 1), + dc_base + UMC_DIOCTLA); + + ret = ph1_ld4_ddrphy_init(phy_base, freq, ddr3plus); + if (ret) + return ret; + + ddrphy_prepare_training(phy_base, phy); + ret = ddrphy_training(phy_base); + if (ret) + return ret; + + phy_base += 0x00001000; + } + + return umc_dramcont_init(dc_base, ca_base, freq, size / (width / 16), + ddr3plus); +} + +int ph1_pro4_umc_init(const struct uniphier_board_data *bd) +{ + void __iomem *umc_base = (void __iomem *)0x5b800000; + void __iomem *ca_base = umc_base + 0x00001000; + void __iomem *dc_base = umc_base + 0x00400000; + void __iomem *ssif_base = umc_base; + int ch, ret; + + for (ch = 0; ch < DRAM_CH_NR; ch++) { + ret = umc_ch_init(dc_base, ca_base, bd->dram_freq, + bd->dram_ch[ch].size, + bd->dram_ch[ch].width, + bd->dram_ddr3plus); + if (ret) { + pr_err("failed to initialize UMC ch%d\n", ch); + return ret; + } + + ca_base += 0x00001000; + dc_base += 0x00200000; + } + + umc_start_ssif(ssif_base); + + return 0; +} |
