umc-ld4.c
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/*
* Copyright (C) 2011-2014 Panasonic Corporation
* Copyright (C) 2015-2016 Socionext Inc.
* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/sizes.h>
#include <asm/processor.h>
#include "../init.h"
#include "ddrphy-init.h"
#include "umc-regs.h"
#define DRAM_CH_NR 2
enum dram_freq {
DRAM_FREQ_1333M,
DRAM_FREQ_1600M,
DRAM_FREQ_NR,
};
enum dram_size {
DRAM_SZ_128M,
DRAM_SZ_256M,
DRAM_SZ_NR,
};
static u32 umc_cmdctla_plus[DRAM_FREQ_NR] = {0x45990b11, 0x36bb0f17};
static u32 umc_cmdctlb_plus[DRAM_FREQ_NR] = {0x16958924, 0x18c6aa24};
static u32 umc_spcctla[DRAM_FREQ_NR][DRAM_SZ_NR] = {
{0x00240512, 0x00350512},
{0x002b0617, 0x003f0617},
};
static u32 umc_spcctlb[DRAM_FREQ_NR] = {0x00ff0006, 0x00ff0008};
static u32 umc_rdatactl[DRAM_FREQ_NR] = {0x000a00ac, 0x000c00ae};
static int umc_get_rank(int ch)
{
return ch; /* ch0: rank0, ch1: rank1 for this SoC */
}
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(0x03010101, ssif_base + UMC_MDMCHSEL);
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(0x00000001, ssif_base + UMC_CPURST);
writel(0x00000001, ssif_base + UMC_IDSRST);
writel(0x00000001, ssif_base + UMC_IXMRST);
writel(0x00000001, ssif_base + UMC_MDMRST);
writel(0x00000001, ssif_base + UMC_MDDRST);
writel(0x00000001, ssif_base + UMC_SIORST);
writel(0x00000001, ssif_base + UMC_VIORST);
writel(0x00000001, ssif_base + UMC_FRCRST);
writel(0x00000001, ssif_base + UMC_RGLRST);
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_freq freq_e;
enum dram_size size_e;
if (!ddr3plus) {
pr_err("DDR3 standard is not supported\n");
return -EINVAL;
}
switch (freq) {
case 1333:
freq_e = DRAM_FREQ_1333M;
break;
case 1600:
freq_e = DRAM_FREQ_1600M;
break;
default:
pr_err("unsupported DRAM frequency %d MHz\n", freq);
return -EINVAL;
}
switch (size) {
case 0:
return 0;
case SZ_128M:
size_e = DRAM_SZ_128M;
break;
case SZ_256M:
size_e = DRAM_SZ_256M;
break;
default:
pr_err("unsupported DRAM size 0x%08lx\n", size);
return -EINVAL;
}
writel(umc_cmdctla_plus[freq_e], dc_base + UMC_CMDCTLA);
writel(umc_cmdctlb_plus[freq_e], dc_base + UMC_CMDCTLB);
writel(umc_spcctla[freq_e][size_e], dc_base + UMC_SPCCTLA);
writel(umc_spcctlb[freq_e], dc_base + UMC_SPCCTLB);
writel(umc_rdatactl[freq_e], dc_base + UMC_RDATACTL_D0);
writel(0x04060806, dc_base + UMC_WDATACTL_D0);
writel(0x04a02000, dc_base + UMC_DATASET);
writel(0x00000000, ca_base + 0x2300);
writel(0x00400020, dc_base + UMC_DCCGCTL);
writel(0x00000003, dc_base + 0x7000);
writel(0x0000000f, dc_base + 0x8000);
writel(0x000000c3, dc_base + 0x8004);
writel(0x00000071, dc_base + 0x8008);
writel(0x0000003b, dc_base + UMC_DICGCTLA);
writel(0x020a0808, dc_base + UMC_DICGCTLB);
writel(0x00000004, dc_base + UMC_FLOWCTLG);
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(0x00000000, dc_base + UMC_SPCSETD);
writel(0x00000520, dc_base + UMC_DFICUPDCTLA);
return 0;
}
static int umc_ch_init(void __iomem *dc_base, void __iomem *ca_base,
int freq, unsigned long size, bool ddr3plus, int ch)
{
void __iomem *phy_base = dc_base + 0x00001000;
int ret;
writel(UMC_INITSET_INIT1EN, dc_base + UMC_INITSET);
while (readl(dc_base + UMC_INITSTAT) & UMC_INITSTAT_INIT1ST)
cpu_relax();
writel(0x00000101, dc_base + UMC_DIOCTLA);
ret = uniphier_ld4_ddrphy_init(phy_base, freq, ddr3plus);
if (ret)
return ret;
ddrphy_prepare_training(phy_base, umc_get_rank(ch));
ret = ddrphy_training(phy_base);
if (ret)
return ret;
return umc_dramcont_init(dc_base, ca_base, freq, size, ddr3plus);
}
int uniphier_ld4_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->flags & UNIPHIER_BD_DDR3PLUS), ch);
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;
}