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6257a0b0e9
The if-else statements for the frequency-dependent register settings seem clumsy. Moving them to arrays would make it cleaner. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/*
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* Copyright (C) 2014-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <linux/err.h>
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#include <linux/types.h>
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#include <linux/io.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 ph1_ld4_ddrphy_init(struct ddrphy __iomem *phy, 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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printf("unsupported DRAM frequency %d MHz\n", freq);
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return -EINVAL;
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}
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writel(0x0300c473, &phy->pgcr[1]);
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writel(ddrphy_ptr0[freq_e], &phy->ptr[0]);
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writel(ddrphy_ptr1[freq_e], &phy->ptr[1]);
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writel(0x00083DEF, &phy->ptr[2]);
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writel(ddrphy_ptr3[freq_e], &phy->ptr[3]);
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writel(ddrphy_ptr4[freq_e], &phy->ptr[4]);
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writel(0xF004001A, &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->dxccr);
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tmp &= ~0x0ee0;
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tmp |= DXCCR_DQSNRES_688_OHM | DXCCR_DQSRES_688_OHM;
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writel(tmp, &phy->dxccr);
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writel(0x0000040B, &phy->dcr);
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writel(ddrphy_dtpr0[freq_e], &phy->dtpr[0]);
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writel(ddrphy_dtpr1[freq_e], &phy->dtpr[1]);
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writel(ddrphy_dtpr2[freq_e], &phy->dtpr[2]);
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writel(ddrphy_mr0[freq_e], &phy->mr0);
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writel(0x00000006, &phy->mr1);
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writel(ddrphy_mr2[freq_e], &phy->mr2);
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writel(ddr3plus ? 0x00000800 : 0x00000000, &phy->mr3);
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while (!(readl(&phy->pgsr[0]) & PGSR0_IDONE))
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;
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writel(0x0300C473, &phy->pgcr[1]);
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writel(0x0000005D, &phy->zq[0].cr[1]);
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return 0;
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}
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