nds32_mmc.c
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/*
* Andestech ATFSDC010 SD/MMC driver
*
* (C) Copyright 2017
* Rick Chen, NDS32 Software Engineering, rick@andestech.com
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <clk.h>
#include <dm.h>
#include <dt-structs.h>
#include <errno.h>
#include <mapmem.h>
#include <mmc.h>
#include <pwrseq.h>
#include <syscon.h>
#include <linux/err.h>
#include <faraday/ftsdc010.h>
#include "ftsdc010_mci.h"
DECLARE_GLOBAL_DATA_PTR;
#if CONFIG_IS_ENABLED(OF_PLATDATA)
struct nds_mmc {
fdt32_t bus_width;
bool cap_mmc_highspeed;
bool cap_sd_highspeed;
fdt32_t clock_freq_min_max[2];
struct phandle_2_cell clocks[4];
fdt32_t fifo_depth;
fdt32_t reg[2];
};
#endif
struct nds_mmc_plat {
#if CONFIG_IS_ENABLED(OF_PLATDATA)
struct nds_mmc dtplat;
#endif
struct mmc_config cfg;
struct mmc mmc;
};
struct ftsdc_priv {
struct clk clk;
struct ftsdc010_chip chip;
int fifo_depth;
bool fifo_mode;
u32 minmax[2];
};
static int nds32_mmc_ofdata_to_platdata(struct udevice *dev)
{
#if !CONFIG_IS_ENABLED(OF_PLATDATA)
struct ftsdc_priv *priv = dev_get_priv(dev);
struct ftsdc010_chip *chip = &priv->chip;
chip->name = dev->name;
chip->ioaddr = (void *)devfdt_get_addr(dev);
chip->buswidth = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
"bus-width", 4);
chip->priv = dev;
priv->fifo_depth = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
"fifo-depth", 0);
priv->fifo_mode = fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),
"fifo-mode");
if (fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(dev),
"clock-freq-min-max", priv->minmax, 2)) {
int val = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
"max-frequency", -EINVAL);
if (val < 0)
return val;
priv->minmax[0] = 400000; /* 400 kHz */
priv->minmax[1] = val;
} else {
debug("%s: 'clock-freq-min-max' property was deprecated.\n",
__func__);
}
#endif
chip->sclk = priv->minmax[1];
chip->regs = chip->ioaddr;
return 0;
}
static int nds32_mmc_probe(struct udevice *dev)
{
struct nds_mmc_plat *plat = dev_get_platdata(dev);
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct ftsdc_priv *priv = dev_get_priv(dev);
struct ftsdc010_chip *chip = &priv->chip;
struct udevice *pwr_dev __maybe_unused;
#if CONFIG_IS_ENABLED(OF_PLATDATA)
int ret;
struct nds_mmc *dtplat = &plat->dtplat;
chip->name = dev->name;
chip->ioaddr = map_sysmem(dtplat->reg[0], dtplat->reg[1]);
chip->buswidth = dtplat->bus_width;
chip->priv = dev;
chip->dev_index = 1;
memcpy(priv->minmax, dtplat->clock_freq_min_max, sizeof(priv->minmax));
ret = clk_get_by_index_platdata(dev, 0, dtplat->clocks, &priv->clk);
if (ret < 0)
return ret;
#endif
ftsdc_setup_cfg(&plat->cfg, dev->name, chip->buswidth, chip->caps,
priv->minmax[1] , priv->minmax[0]);
chip->mmc = &plat->mmc;
chip->mmc->priv = &priv->chip;
chip->mmc->dev = dev;
upriv->mmc = chip->mmc;
return ftsdc010_probe(dev);
}
static int nds32_mmc_bind(struct udevice *dev)
{
struct nds_mmc_plat *plat = dev_get_platdata(dev);
return ftsdc010_bind(dev, &plat->mmc, &plat->cfg);
}
static const struct udevice_id nds32_mmc_ids[] = {
{ .compatible = "andestech,atsdc010" },
{ }
};
U_BOOT_DRIVER(nds32_mmc_drv) = {
.name = "nds32_mmc",
.id = UCLASS_MMC,
.of_match = nds32_mmc_ids,
.ofdata_to_platdata = nds32_mmc_ofdata_to_platdata,
.ops = &dm_ftsdc010_ops,
.bind = nds32_mmc_bind,
.probe = nds32_mmc_probe,
.priv_auto_alloc_size = sizeof(struct ftsdc_priv),
.platdata_auto_alloc_size = sizeof(struct nds_mmc_plat),
};