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/*
* Copyright (C) 2016 Socionext Inc.
* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <linux/io.h>
#include <linux/sizes.h>
#include <dm/device.h>
#include <mmc.h>
#include <sdhci.h>
/* HRS - Host Register Set (specific to Cadence) */
#define SDHCI_CDNS_HRS04 0x10 /* PHY access port */
#define SDHCI_CDNS_HRS04_ACK BIT(26)
#define SDHCI_CDNS_HRS04_RD BIT(25)
#define SDHCI_CDNS_HRS04_WR BIT(24)
#define SDHCI_CDNS_HRS04_RDATA_SHIFT 12
#define SDHCI_CDNS_HRS04_WDATA_SHIFT 8
#define SDHCI_CDNS_HRS04_ADDR_SHIFT 0
/* SRS - Slot Register Set (SDHCI-compatible) */
#define SDHCI_CDNS_SRS_BASE 0x200
/* PHY */
#define SDHCI_CDNS_PHY_DLY_SD_HS 0x00
#define SDHCI_CDNS_PHY_DLY_SD_DEFAULT 0x01
#define SDHCI_CDNS_PHY_DLY_UHS_SDR12 0x02
#define SDHCI_CDNS_PHY_DLY_UHS_SDR25 0x03
#define SDHCI_CDNS_PHY_DLY_UHS_SDR50 0x04
#define SDHCI_CDNS_PHY_DLY_UHS_DDR50 0x05
#define SDHCI_CDNS_PHY_DLY_EMMC_LEGACY 0x06
#define SDHCI_CDNS_PHY_DLY_EMMC_SDR 0x07
#define SDHCI_CDNS_PHY_DLY_EMMC_DDR 0x08
struct sdhci_cdns_plat {
struct mmc_config cfg;
struct mmc mmc;
void __iomem *hrs_addr;
};
static void sdhci_cdns_write_phy_reg(struct sdhci_cdns_plat *plat,
u8 addr, u8 data)
{
void __iomem *reg = plat->hrs_addr + SDHCI_CDNS_HRS04;
u32 tmp;
tmp = (data << SDHCI_CDNS_HRS04_WDATA_SHIFT) |
(addr << SDHCI_CDNS_HRS04_ADDR_SHIFT);
writel(tmp, reg);
tmp |= SDHCI_CDNS_HRS04_WR;
writel(tmp, reg);
tmp &= ~SDHCI_CDNS_HRS04_WR;
writel(tmp, reg);
}
static void sdhci_cdns_phy_init(struct sdhci_cdns_plat *plat)
{
sdhci_cdns_write_phy_reg(plat, SDHCI_CDNS_PHY_DLY_SD_HS, 4);
sdhci_cdns_write_phy_reg(plat, SDHCI_CDNS_PHY_DLY_SD_DEFAULT, 4);
sdhci_cdns_write_phy_reg(plat, SDHCI_CDNS_PHY_DLY_EMMC_LEGACY, 9);
sdhci_cdns_write_phy_reg(plat, SDHCI_CDNS_PHY_DLY_EMMC_SDR, 2);
sdhci_cdns_write_phy_reg(plat, SDHCI_CDNS_PHY_DLY_EMMC_DDR, 3);
}
static int sdhci_cdns_bind(struct udevice *dev)
{
struct sdhci_cdns_plat *plat = dev_get_platdata(dev);
return sdhci_bind(dev, &plat->mmc, &plat->cfg);
}
static int sdhci_cdns_probe(struct udevice *dev)
{
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct sdhci_cdns_plat *plat = dev_get_platdata(dev);
struct sdhci_host *host = dev_get_priv(dev);
fdt_addr_t base;
int ret;
base = dev_get_addr(dev);
if (base == FDT_ADDR_T_NONE)
return -EINVAL;
plat->hrs_addr = devm_ioremap(dev, base, SZ_1K);
if (!plat->hrs_addr)
return -ENOMEM;
host->name = dev->name;
host->ioaddr = plat->hrs_addr + SDHCI_CDNS_SRS_BASE;
host->quirks |= SDHCI_QUIRK_WAIT_SEND_CMD;
sdhci_cdns_phy_init(plat);
ret = sdhci_setup_cfg(&plat->cfg, host, 0, 0);
if (ret)
return ret;
upriv->mmc = &plat->mmc;
host->mmc = &plat->mmc;
host->mmc->priv = host;
return sdhci_probe(dev);
}
static const struct udevice_id sdhci_cdns_match[] = {
{ .compatible = "socionext,uniphier-sd4hc" },
{ .compatible = "cdns,sd4hc" },
{ /* sentinel */ }
};
U_BOOT_DRIVER(sdhci_cdns) = {
.name = "sdhci-cdns",
.id = UCLASS_MMC,
.of_match = sdhci_cdns_match,
.bind = sdhci_cdns_bind,
.probe = sdhci_cdns_probe,
.priv_auto_alloc_size = sizeof(struct sdhci_host),
.platdata_auto_alloc_size = sizeof(struct sdhci_cdns_plat),
.ops = &sdhci_ops,
};
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