Mirrors/u-boot
2
0
Fork 0
mirror of https://github.com/AsahiLinux/u-boot synced 2024-12-26 21:13:48 +00:00
Code Issues Projects Releases Packages Wiki Activity
u-boot/drivers/mmc/sdhci-cadence.c
Simon Glass 401d1c4f5d common: Drop asm/global_data.h from common header 
Move this out of the common header and include it only where needed.  In
a number of cases this requires adding "struct udevice;" to avoid adding
another large header or in other cases replacing / adding missing header
files that had been pulled in, very indirectly.   Finally, we have a few
cases where we did not need to include <asm/global_data.h> at all, so
remove that include.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
2021-02-02 15:33:42 -05:00

316 lines
8.3 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Socionext Inc.
* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
*/
#include <common.h>
#include <dm.h>
#include <asm/global_data.h>
#include <dm/device_compat.h>
#include <linux/bitfield.h>
#include <linux/bitops.h>
#include <linux/bug.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/sizes.h>
#include <linux/libfdt.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 GENMASK(23, 16)
#define SDHCI_CDNS_HRS04_WDATA GENMASK(15, 8)
#define SDHCI_CDNS_HRS04_ADDR GENMASK(5, 0)
#define SDHCI_CDNS_HRS06 0x18 /* eMMC control */
#define SDHCI_CDNS_HRS06_TUNE_UP BIT(15)
#define SDHCI_CDNS_HRS06_TUNE GENMASK(13, 8)
#define SDHCI_CDNS_HRS06_MODE GENMASK(2, 0)
#define SDHCI_CDNS_HRS06_MODE_SD 0x0
#define SDHCI_CDNS_HRS06_MODE_MMC_SDR 0x2
#define SDHCI_CDNS_HRS06_MODE_MMC_DDR 0x3
#define SDHCI_CDNS_HRS06_MODE_MMC_HS200 0x4
#define SDHCI_CDNS_HRS06_MODE_MMC_HS400 0x5
#define SDHCI_CDNS_HRS06_MODE_MMC_HS400ES 0x6
/* 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
#define SDHCI_CDNS_PHY_DLY_SDCLK 0x0b
#define SDHCI_CDNS_PHY_DLY_HSMMC 0x0c
#define SDHCI_CDNS_PHY_DLY_STROBE 0x0d
/*
* The tuned val register is 6 bit-wide, but not the whole of the range is
* available. The range 0-42 seems to be available (then 43 wraps around to 0)
* but I am not quite sure if it is official. Use only 0 to 39 for safety.
*/
#define SDHCI_CDNS_MAX_TUNING_LOOP 40
struct sdhci_cdns_plat {
struct mmc_config cfg;
struct mmc mmc;
void __iomem *hrs_addr;
};
struct sdhci_cdns_phy_cfg {
const char *property;
u8 addr;
};
static const struct sdhci_cdns_phy_cfg sdhci_cdns_phy_cfgs[] = {
{ "cdns,phy-input-delay-sd-highspeed", SDHCI_CDNS_PHY_DLY_SD_HS, },
{ "cdns,phy-input-delay-legacy", SDHCI_CDNS_PHY_DLY_SD_DEFAULT, },
{ "cdns,phy-input-delay-sd-uhs-sdr12", SDHCI_CDNS_PHY_DLY_UHS_SDR12, },
{ "cdns,phy-input-delay-sd-uhs-sdr25", SDHCI_CDNS_PHY_DLY_UHS_SDR25, },
{ "cdns,phy-input-delay-sd-uhs-sdr50", SDHCI_CDNS_PHY_DLY_UHS_SDR50, },
{ "cdns,phy-input-delay-sd-uhs-ddr50", SDHCI_CDNS_PHY_DLY_UHS_DDR50, },
{ "cdns,phy-input-delay-mmc-highspeed", SDHCI_CDNS_PHY_DLY_EMMC_SDR, },
{ "cdns,phy-input-delay-mmc-ddr", SDHCI_CDNS_PHY_DLY_EMMC_DDR, },
{ "cdns,phy-dll-delay-sdclk", SDHCI_CDNS_PHY_DLY_SDCLK, },
{ "cdns,phy-dll-delay-sdclk-hsmmc", SDHCI_CDNS_PHY_DLY_HSMMC, },
{ "cdns,phy-dll-delay-strobe", SDHCI_CDNS_PHY_DLY_STROBE, },
};
static int 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;
int ret;
tmp = FIELD_PREP(SDHCI_CDNS_HRS04_WDATA, data) |
FIELD_PREP(SDHCI_CDNS_HRS04_ADDR, addr);
writel(tmp, reg);
tmp |= SDHCI_CDNS_HRS04_WR;
writel(tmp, reg);
ret = readl_poll_timeout(reg, tmp, tmp & SDHCI_CDNS_HRS04_ACK, 10);
if (ret)
return ret;
tmp &= ~SDHCI_CDNS_HRS04_WR;
writel(tmp, reg);
return 0;
}
static int sdhci_cdns_phy_init(struct sdhci_cdns_plat *plat,
const void *fdt, int nodeoffset)
{
const fdt32_t *prop;
int ret, i;
for (i = 0; i < ARRAY_SIZE(sdhci_cdns_phy_cfgs); i++) {
prop = fdt_getprop(fdt, nodeoffset,
sdhci_cdns_phy_cfgs[i].property, NULL);
if (!prop)
continue;
ret = sdhci_cdns_write_phy_reg(plat,
sdhci_cdns_phy_cfgs[i].addr,
fdt32_to_cpu(*prop));
if (ret)
return ret;
}
return 0;
}
static void sdhci_cdns_set_control_reg(struct sdhci_host *host)
{
struct mmc *mmc = host->mmc;
struct sdhci_cdns_plat *plat = dev_get_plat(mmc->dev);
unsigned int clock = mmc->clock;
u32 mode, tmp;
/*
* REVISIT:
* The mode should be decided by MMC_TIMING_* like Linux, but
* U-Boot does not support timing. Use the clock frequency instead.
*/
if (clock <= 26000000) {
mode = SDHCI_CDNS_HRS06_MODE_SD; /* use this for Legacy */
} else if (clock <= 52000000) {
if (mmc->ddr_mode)
mode = SDHCI_CDNS_HRS06_MODE_MMC_DDR;
else
mode = SDHCI_CDNS_HRS06_MODE_MMC_SDR;
} else {
if (mmc->ddr_mode)
mode = SDHCI_CDNS_HRS06_MODE_MMC_HS400;
else
mode = SDHCI_CDNS_HRS06_MODE_MMC_HS200;
}
tmp = readl(plat->hrs_addr + SDHCI_CDNS_HRS06);
tmp &= ~SDHCI_CDNS_HRS06_MODE;
tmp |= FIELD_PREP(SDHCI_CDNS_HRS06_MODE, mode);
writel(tmp, plat->hrs_addr + SDHCI_CDNS_HRS06);
}
static const struct sdhci_ops sdhci_cdns_ops = {
.set_control_reg = sdhci_cdns_set_control_reg,
};
static int sdhci_cdns_set_tune_val(struct sdhci_cdns_plat *plat,
unsigned int val)
{
void __iomem *reg = plat->hrs_addr + SDHCI_CDNS_HRS06;
u32 tmp;
int i, ret;
if (WARN_ON(!FIELD_FIT(SDHCI_CDNS_HRS06_TUNE, val)))
return -EINVAL;
tmp = readl(reg);
tmp &= ~SDHCI_CDNS_HRS06_TUNE;
tmp |= FIELD_PREP(SDHCI_CDNS_HRS06_TUNE, val);
/*
* Workaround for IP errata:
* The IP6116 SD/eMMC PHY design has a timing issue on receive data
* path. Send tune request twice.
*/
for (i = 0; i < 2; i++) {
tmp |= SDHCI_CDNS_HRS06_TUNE_UP;
writel(tmp, reg);
ret = readl_poll_timeout(reg, tmp,
!(tmp & SDHCI_CDNS_HRS06_TUNE_UP), 1);
if (ret)
return ret;
}
return 0;
}
static int __maybe_unused sdhci_cdns_execute_tuning(struct udevice *dev,
unsigned int opcode)
{
struct sdhci_cdns_plat *plat = dev_get_plat(dev);
struct mmc *mmc = &plat->mmc;
int cur_streak = 0;
int max_streak = 0;
int end_of_streak = 0;
int i;
/*
* This handler only implements the eMMC tuning that is specific to
* this controller. The tuning for SD timing should be handled by the
* SDHCI core.
*/
if (!IS_MMC(mmc))
return -ENOTSUPP;
if (WARN_ON(opcode != MMC_CMD_SEND_TUNING_BLOCK_HS200))
return -EINVAL;
for (i = 0; i < SDHCI_CDNS_MAX_TUNING_LOOP; i++) {
if (sdhci_cdns_set_tune_val(plat, i) ||
mmc_send_tuning(mmc, opcode, NULL)) { /* bad */
cur_streak = 0;
} else { /* good */
cur_streak++;
if (cur_streak > max_streak) {
max_streak = cur_streak;
end_of_streak = i;
}
}
}
if (!max_streak) {
dev_err(dev, "no tuning point found\n");
return -EIO;
}
return sdhci_cdns_set_tune_val(plat, end_of_streak - max_streak / 2);
}
static struct dm_mmc_ops sdhci_cdns_mmc_ops;
static int sdhci_cdns_bind(struct udevice *dev)
{
struct sdhci_cdns_plat *plat = dev_get_plat(dev);
return sdhci_bind(dev, &plat->mmc, &plat->cfg);
}
static int sdhci_cdns_probe(struct udevice *dev)
{
DECLARE_GLOBAL_DATA_PTR;
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct sdhci_cdns_plat *plat = dev_get_plat(dev);
struct sdhci_host *host = dev_get_priv(dev);
fdt_addr_t base;
int ret;
base = dev_read_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->ops = &sdhci_cdns_ops;
host->quirks |= SDHCI_QUIRK_WAIT_SEND_CMD;
sdhci_cdns_mmc_ops = sdhci_ops;
#ifdef MMC_SUPPORTS_TUNING
sdhci_cdns_mmc_ops.execute_tuning = sdhci_cdns_execute_tuning;
#endif
ret = mmc_of_parse(dev, &plat->cfg);
if (ret)
return ret;
ret = sdhci_cdns_phy_init(plat, gd->fdt_blob, dev_of_offset(dev));
if (ret)
return ret;
host->mmc = &plat->mmc;
host->mmc->dev = dev;
ret = sdhci_setup_cfg(&plat->cfg, host, 0, 0);
if (ret)
return ret;
upriv->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 = sizeof(struct sdhci_host),
.plat_auto = sizeof(struct sdhci_cdns_plat),
.ops = &sdhci_cdns_mmc_ops,
};
Reference in a new issue View git blame Copy permalink