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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2016 Freescale Semiconductor, Inc.
*/
/*
* Generic driver for Freescale MMDC(Multi Mode DDR Controller).
*/
#include <common.h>
#include <fsl_mmdc.h>
#include <asm/io.h>
static void set_wait_for_bits_clear(void *ptr, u32 value, u32 bits)
{
int timeout = 1000;
out_be32(ptr, value);
while (in_be32(ptr) & bits) {
udelay(100);
timeout--;
}
if (timeout <= 0)
printf("Error: %p wait for clear timeout.\n", ptr);
}
void mmdc_init(const struct fsl_mmdc_info *priv)
{
struct mmdc_regs *mmdc = (struct mmdc_regs *)CONFIG_SYS_FSL_DDR_ADDR;
unsigned int tmp;
/* 1. set configuration request */
out_be32(&mmdc->mdscr, MDSCR_ENABLE_CON_REQ);
/* 2. configure the desired timing parameters */
out_be32(&mmdc->mdotc, priv->mdotc);
out_be32(&mmdc->mdcfg0, priv->mdcfg0);
out_be32(&mmdc->mdcfg1, priv->mdcfg1);
out_be32(&mmdc->mdcfg2, priv->mdcfg2);
/* 3. configure DDR type and other miscellaneous parameters */
out_be32(&mmdc->mdmisc, priv->mdmisc);
out_be32(&mmdc->mpmur0, MMDC_MPMUR0_FRC_MSR);
out_be32(&mmdc->mdrwd, priv->mdrwd);
out_be32(&mmdc->mpodtctrl, priv->mpodtctrl);
/* 4. configure the required delay while leaving reset */
out_be32(&mmdc->mdor, priv->mdor);
/* 5. configure DDR physical parameters */
/* set row/column address width, burst length, data bus width */
tmp = priv->mdctl & ~(MDCTL_SDE0 | MDCTL_SDE1);
out_be32(&mmdc->mdctl, tmp);
/* configure address space partition */
out_be32(&mmdc->mdasp, priv->mdasp);
/* 6. perform a ZQ calibration - not needed here, doing in #8b */
/* 7. enable MMDC with the desired chip select */
#if (CONFIG_CHIP_SELECTS_PER_CTRL == 1)
out_be32(&mmdc->mdctl, tmp | MDCTL_SDE0);
#elif (CONFIG_CHIP_SELECTS_PER_CTRL == 2)
out_be32(&mmdc->mdctl, tmp | MDCTL_SDE0 | MDCTL_SDE1);
#endif
/* 8a. dram init sequence: update MRs for ZQ, ODT, PRE, etc */
out_be32(&mmdc->mdscr, CMD_ADDR_LSB_MR_ADDR(8) | MDSCR_ENABLE_CON_REQ |
CMD_LOAD_MODE_REG | CMD_BANK_ADDR_2);
out_be32(&mmdc->mdscr, CMD_ADDR_LSB_MR_ADDR(0) | MDSCR_ENABLE_CON_REQ |
CMD_LOAD_MODE_REG | CMD_BANK_ADDR_3);
out_be32(&mmdc->mdscr, CMD_ADDR_LSB_MR_ADDR(4) | MDSCR_ENABLE_CON_REQ |
CMD_LOAD_MODE_REG | CMD_BANK_ADDR_1);
out_be32(&mmdc->mdscr, CMD_ADDR_MSB_MR_OP(0x19) |
CMD_ADDR_LSB_MR_ADDR(0x30) |
MDSCR_ENABLE_CON_REQ |
CMD_LOAD_MODE_REG | CMD_BANK_ADDR_0);
/* 8b. ZQ calibration */
out_be32(&mmdc->mdscr, CMD_ADDR_MSB_MR_OP(0x4) | MDSCR_ENABLE_CON_REQ |
CMD_ZQ_CALIBRATION | CMD_BANK_ADDR_0);
set_wait_for_bits_clear(&mmdc->mpzqhwctrl, priv->mpzqhwctrl,
MPZQHWCTRL_ZQ_HW_FORCE);
/* 9a. calibrations now, wr lvl */
out_be32(&mmdc->mdscr, CMD_ADDR_LSB_MR_ADDR(0x84) |
MDSCR_ENABLE_CON_REQ |
CMD_LOAD_MODE_REG | CMD_BANK_ADDR_1);
out_be32(&mmdc->mdscr, MDSCR_ENABLE_CON_REQ | MDSCR_WL_EN |
CMD_NORMAL);
set_wait_for_bits_clear(&mmdc->mpwlgcr, MPWLGCR_HW_WL_EN,
MPWLGCR_HW_WL_EN);
mdelay(1);
out_be32(&mmdc->mdscr, CMD_ADDR_LSB_MR_ADDR(4) | MDSCR_ENABLE_CON_REQ |
CMD_LOAD_MODE_REG | CMD_BANK_ADDR_1);
out_be32(&mmdc->mdscr, MDSCR_ENABLE_CON_REQ);
mdelay(1);
/* 9b. read DQS gating calibration */
out_be32(&mmdc->mdscr, CMD_ADDR_MSB_MR_OP(4) | MDSCR_ENABLE_CON_REQ |
CMD_PRECHARGE_BANK_OPEN | CMD_BANK_ADDR_0);
out_be32(&mmdc->mdscr, CMD_ADDR_LSB_MR_ADDR(4) | MDSCR_ENABLE_CON_REQ |
CMD_LOAD_MODE_REG | CMD_BANK_ADDR_3);
out_be32(&mmdc->mppdcmpr2, MPPDCMPR2_MPR_COMPARE_EN);
/* set absolute read delay offset */
if (priv->mprddlctl)
out_be32(&mmdc->mprddlctl, priv->mprddlctl);
else
out_be32(&mmdc->mprddlctl, MMDC_MPRDDLCTL_DEFAULT_DELAY);
set_wait_for_bits_clear(&mmdc->mpdgctrl0,
AUTO_RD_DQS_GATING_CALIBRATION_EN,
AUTO_RD_DQS_GATING_CALIBRATION_EN);
out_be32(&mmdc->mdscr, MDSCR_ENABLE_CON_REQ | CMD_LOAD_MODE_REG |
CMD_BANK_ADDR_3);
/* 9c. read calibration */
out_be32(&mmdc->mdscr, CMD_ADDR_MSB_MR_OP(4) | MDSCR_ENABLE_CON_REQ |
CMD_PRECHARGE_BANK_OPEN | CMD_BANK_ADDR_0);
out_be32(&mmdc->mdscr, CMD_ADDR_LSB_MR_ADDR(4) | MDSCR_ENABLE_CON_REQ |
CMD_LOAD_MODE_REG | CMD_BANK_ADDR_3);
out_be32(&mmdc->mppdcmpr2, MPPDCMPR2_MPR_COMPARE_EN);
set_wait_for_bits_clear(&mmdc->mprddlhwctl,
MPRDDLHWCTL_AUTO_RD_CALIBRATION_EN,
MPRDDLHWCTL_AUTO_RD_CALIBRATION_EN);
out_be32(&mmdc->mdscr, MDSCR_ENABLE_CON_REQ | CMD_LOAD_MODE_REG |
CMD_BANK_ADDR_3);
/* 10. configure power-down, self-refresh entry, exit parameters */
out_be32(&mmdc->mdpdc, priv->mdpdc);
out_be32(&mmdc->mapsr, MMDC_MAPSR_PWR_SAV_CTRL_STAT);
/* 11. ZQ config again? do nothing here */
/* 12. refresh scheme */
set_wait_for_bits_clear(&mmdc->mdref, priv->mdref,
MDREF_START_REFRESH);
/* 13. disable CON_REQ */
out_be32(&mmdc->mdscr, MDSCR_DISABLE_CFG_REQ);
}
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