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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2019 Intel Corporation <www.intel.com>
*
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <div64.h>
#include <fdtdec.h>
#include <hang.h>
#include <log.h>
#include <ram.h>
#include <reset.h>
#include "sdram_soc64.h"
#include <wait_bit.h>
#include <asm/arch/firewall.h>
#include <asm/arch/reset_manager.h>
#include <asm/arch/system_manager.h>
#include <asm/io.h>
#include <linux/sizes.h>
DECLARE_GLOBAL_DATA_PTR;
int sdram_mmr_init_full(struct udevice *dev)
{
struct altera_sdram_platdata *plat = dev->platdata;
struct altera_sdram_priv *priv = dev_get_priv(dev);
u32 i;
int ret;
phys_size_t hw_size;
bd_t bd = {0};
/* Ensure HMC clock is running */
if (poll_hmc_clock_status()) {
debug("DDR: Error as HMC clock was not running\n");
return -EPERM;
}
/* Trying 3 times to do a calibration */
for (i = 0; i < 3; i++) {
ret = wait_for_bit_le32((const void *)(plat->hmc +
DDRCALSTAT),
DDR_HMC_DDRCALSTAT_CAL_MSK, true, 1000,
false);
if (!ret)
break;
emif_reset(plat);
}
if (ret) {
puts("DDR: Error as SDRAM calibration failed\n");
return -EPERM;
}
debug("DDR: Calibration success\n");
/*
* Configure the DDR IO size
* niosreserve0: Used to indicate DDR width &
* bit[7:0] = Number of data bits (bit[6:5] 0x01=32bit, 0x10=64bit)
* bit[8] = 1 if user-mode OCT is present
* bit[9] = 1 if warm reset compiled into EMIF Cal Code
* bit[10] = 1 if warm reset is on during generation in EMIF Cal
* niosreserve1: IP ADCDS version encoded as 16 bit value
* bit[2:0] = Variant (0=not special,1=FAE beta, 2=Customer beta,
* 3=EAP, 4-6 are reserved)
* bit[5:3] = Service Pack # (e.g. 1)
* bit[9:6] = Minor Release #
* bit[14:10] = Major Release #
*/
/* Configure DDR IO size x16, x32 and x64 mode */
u32 update_value;
update_value = hmc_readl(plat, NIOSRESERVED0);
update_value = (update_value & 0xFF) >> 5;
/* Configure DDR data rate 0-HAlf-rate 1-Quarter-rate */
update_value |= (hmc_readl(plat, CTRLCFG3) & 0x4);
hmc_ecc_writel(plat, update_value, DDRIOCTRL);
/* Copy values MMR IOHMC dramaddrw to HMC adp DRAMADDRWIDTH */
hmc_ecc_writel(plat, hmc_readl(plat, DRAMADDRW), DRAMADDRWIDTH);
/* assigning the SDRAM size */
phys_size_t size = sdram_calculate_size(plat);
if (size <= 0)
hw_size = PHYS_SDRAM_1_SIZE;
else
hw_size = size;
/* Get bank configuration from devicetree */
ret = fdtdec_decode_ram_size(gd->fdt_blob, NULL, 0, NULL,
(phys_size_t *)&gd->ram_size, &bd);
if (ret) {
puts("DDR: Failed to decode memory node\n");
return -ENXIO;
}
if (gd->ram_size != hw_size) {
printf("DDR: Warning: DRAM size from device tree (%lld MiB)\n",
gd->ram_size >> 20);
printf(" mismatch with hardware (%lld MiB).\n",
hw_size >> 20);
}
if (gd->ram_size > hw_size) {
printf("DDR: Error: DRAM size from device tree is greater\n");
printf(" than hardware size.\n");
hang();
}
printf("DDR: %lld MiB\n", gd->ram_size >> 20);
/* This enables nonsecure access to DDR */
/* mpuregion0addr_limit */
FW_MPU_DDR_SCR_WRITEL(gd->ram_size - 1,
FW_MPU_DDR_SCR_MPUREGION0ADDR_LIMIT);
FW_MPU_DDR_SCR_WRITEL(0x1F, FW_MPU_DDR_SCR_MPUREGION0ADDR_LIMITEXT);
/* nonmpuregion0addr_limit */
FW_MPU_DDR_SCR_WRITEL(gd->ram_size - 1,
FW_MPU_DDR_SCR_NONMPUREGION0ADDR_LIMIT);
/* Enable mpuregion0enable and nonmpuregion0enable */
FW_MPU_DDR_SCR_WRITEL(MPUREGION0_ENABLE | NONMPUREGION0_ENABLE,
FW_MPU_DDR_SCR_EN_SET);
u32 ctrlcfg1 = hmc_readl(plat, CTRLCFG1);
/* Enable or disable the DDR ECC */
if (CTRLCFG1_CFG_CTRL_EN_ECC(ctrlcfg1)) {
setbits_le32(plat->hmc + ECCCTRL1,
(DDR_HMC_ECCCTL_AWB_CNT_RST_SET_MSK |
DDR_HMC_ECCCTL_CNT_RST_SET_MSK |
DDR_HMC_ECCCTL_ECC_EN_SET_MSK));
clrbits_le32(plat->hmc + ECCCTRL1,
(DDR_HMC_ECCCTL_AWB_CNT_RST_SET_MSK |
DDR_HMC_ECCCTL_CNT_RST_SET_MSK));
setbits_le32(plat->hmc + ECCCTRL2,
(DDR_HMC_ECCCTL2_RMW_EN_SET_MSK |
DDR_HMC_ECCCTL2_AWB_EN_SET_MSK));
setbits_le32(plat->hmc + ERRINTEN,
DDR_HMC_ERRINTEN_DERRINTEN_EN_SET_MSK);
if (!cpu_has_been_warmreset())
sdram_init_ecc_bits(&bd);
} else {
clrbits_le32(plat->hmc + ECCCTRL1,
(DDR_HMC_ECCCTL_AWB_CNT_RST_SET_MSK |
DDR_HMC_ECCCTL_CNT_RST_SET_MSK |
DDR_HMC_ECCCTL_ECC_EN_SET_MSK));
clrbits_le32(plat->hmc + ECCCTRL2,
(DDR_HMC_ECCCTL2_RMW_EN_SET_MSK |
DDR_HMC_ECCCTL2_AWB_EN_SET_MSK));
}
/* Enable non-secure reads/writes to HMC Adapter for SDRAM ECC */
writel(FW_HMC_ADAPTOR_MPU_MASK, FW_HMC_ADAPTOR_REG_ADDR);
sdram_size_check(&bd);
priv->info.base = bd.bi_dram[0].start;
priv->info.size = gd->ram_size;
debug("DDR: HMC init success\n");
return 0;
}
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