79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2014 Panasonic Corporation
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* Copyright (C) 2015-2016 Socionext Inc.
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*/
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#include <linux/bitops.h>
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#include <linux/errno.h>
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#include <linux/io.h>
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#include <linux/printk.h>
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#include "ddrphy-init.h"
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#include "ddrphy-regs.h"
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enum dram_freq {
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DRAM_FREQ_1333M,
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DRAM_FREQ_1600M,
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DRAM_FREQ_NR,
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};
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static u32 ddrphy_ptr0[DRAM_FREQ_NR] = {0x0a806844, 0x0c807d04};
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static u32 ddrphy_ptr1[DRAM_FREQ_NR] = {0x208e0124, 0x2710015E};
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static u32 ddrphy_ptr3[DRAM_FREQ_NR] = {0x0f051616, 0x12061A80};
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static u32 ddrphy_ptr4[DRAM_FREQ_NR] = {0x06ae08d6, 0x08027100};
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static u32 ddrphy_dtpr0[DRAM_FREQ_NR] = {0x85589955, 0x999cbb66};
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static u32 ddrphy_dtpr1[DRAM_FREQ_NR] = {0x1a8363c0, 0x1a878400};
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static u32 ddrphy_dtpr2[DRAM_FREQ_NR] = {0x5002c200, 0xa00214f8};
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static u32 ddrphy_mr0[DRAM_FREQ_NR] = {0x00000b51, 0x00000d71};
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static u32 ddrphy_mr2[DRAM_FREQ_NR] = {0x00000290, 0x00000298};
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int uniphier_ld4_ddrphy_init(void __iomem *phy_base, int freq, bool ddr3plus)
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{
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enum dram_freq freq_e;
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u32 tmp;
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switch (freq) {
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case 1333:
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freq_e = DRAM_FREQ_1333M;
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break;
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case 1600:
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freq_e = DRAM_FREQ_1600M;
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break;
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default:
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pr_err("unsupported DRAM frequency %d MHz\n", freq);
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return -EINVAL;
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}
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writel(0x0300c473, phy_base + PHY_PGCR1);
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writel(ddrphy_ptr0[freq_e], phy_base + PHY_PTR0);
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writel(ddrphy_ptr1[freq_e], phy_base + PHY_PTR1);
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writel(0x00083DEF, phy_base + PHY_PTR2);
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writel(ddrphy_ptr3[freq_e], phy_base + PHY_PTR3);
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writel(ddrphy_ptr4[freq_e], phy_base + PHY_PTR4);
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writel(0xF004001A, phy_base + PHY_DSGCR);
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/* change the value of the on-die pull-up/pull-down registors */
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tmp = readl(phy_base + PHY_DXCCR);
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tmp &= ~0x0ee0;
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tmp |= PHY_DXCCR_DQSNRES_688_OHM | PHY_DXCCR_DQSRES_688_OHM;
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writel(tmp, phy_base + PHY_DXCCR);
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writel(0x0000040B, phy_base + PHY_DCR);
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writel(ddrphy_dtpr0[freq_e], phy_base + PHY_DTPR0);
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writel(ddrphy_dtpr1[freq_e], phy_base + PHY_DTPR1);
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writel(ddrphy_dtpr2[freq_e], phy_base + PHY_DTPR2);
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writel(ddrphy_mr0[freq_e], phy_base + PHY_MR0);
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writel(0x00000006, phy_base + PHY_MR1);
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writel(ddrphy_mr2[freq_e], phy_base + PHY_MR2);
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writel(ddr3plus ? 0x00000800 : 0x00000000, phy_base + PHY_MR3);
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while (!(readl(phy_base + PHY_PGSR0) & PHY_PGSR0_IDONE))
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;
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writel(0x0300C473, phy_base + PHY_PGCR1);
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writel(0x0000005D, phy_base + PHY_ZQ_BASE + PHY_ZQ_CR1);
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return 0;
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}
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