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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2015 Linaro
* peter.griffin <peter.griffin@linaro.org>
*/
#include <common.h>
#include <clk.h>
#include <dm.h>
#include <dwmmc.h>
#include <errno.h>
#include <fdtdec.h>
#include <malloc.h>
#include <reset.h>
#include <asm/global_data.h>
#include <dm/device_compat.h>
DECLARE_GLOBAL_DATA_PTR;
enum hi6220_dwmmc_clk_type {
HI6220_DWMMC_CLK_BIU,
HI6220_DWMMC_CLK_CIU,
HI6220_DWMMC_CLK_CNT,
};
struct hi6220_dwmmc_plat {
struct mmc_config cfg;
struct mmc mmc;
};
struct hi6220_dwmmc_priv_data {
struct dwmci_host host;
struct clk *clks[HI6220_DWMMC_CLK_CNT];
struct reset_ctl_bulk rsts;
};
struct hisi_mmc_data {
unsigned int clock;
bool use_fifo;
};
static int hi6220_dwmmc_of_to_plat(struct udevice *dev)
{
struct hi6220_dwmmc_priv_data *priv = dev_get_priv(dev);
struct dwmci_host *host = &priv->host;
int ret;
if (CONFIG_IS_ENABLED(CLK) && CONFIG_IS_ENABLED(DM_RESET)) {
priv->clks[HI6220_DWMMC_CLK_BIU] = devm_clk_get(dev, "biu");
if (IS_ERR(priv->clks[HI6220_DWMMC_CLK_BIU])) {
ret = PTR_ERR(priv->clks[HI6220_DWMMC_CLK_BIU]);
dev_err(dev, "Failed to get BIU clock(ret = %d).\n", ret);
return log_msg_ret("clk", ret);
}
priv->clks[HI6220_DWMMC_CLK_CIU] = devm_clk_get(dev, "ciu");
if (IS_ERR(priv->clks[HI6220_DWMMC_CLK_CIU])) {
ret = PTR_ERR(priv->clks[HI6220_DWMMC_CLK_CIU]);
dev_err(dev, "Failed to get CIU clock(ret = %d).\n", ret);
return log_msg_ret("clk", ret);
}
ret = reset_get_bulk(dev, &priv->rsts);
if (ret) {
dev_err(dev, "Failed to get resets(ret = %d)", ret);
return log_msg_ret("rst", ret);
}
}
host->name = dev->name;
host->ioaddr = dev_read_addr_ptr(dev);
host->buswidth = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
"bus-width", 4);
/* use non-removable property for differentiating SD card and eMMC */
if (dev_read_bool(dev, "non-removable"))
host->dev_index = 0;
else
host->dev_index = 1;
host->priv = priv;
return 0;
}
static int hi6220_dwmmc_probe(struct udevice *dev)
{
struct hi6220_dwmmc_plat *plat = dev_get_plat(dev);
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct hi6220_dwmmc_priv_data *priv = dev_get_priv(dev);
struct dwmci_host *host = &priv->host;
struct hisi_mmc_data *mmc_data;
int ret;
mmc_data = (struct hisi_mmc_data *)dev_get_driver_data(dev);
host->bus_hz = mmc_data->clock;
if (CONFIG_IS_ENABLED(CLK) && CONFIG_IS_ENABLED(DM_RESET)) {
ret = clk_prepare_enable(priv->clks[HI6220_DWMMC_CLK_BIU]);
if (ret) {
dev_err(dev, "Failed to enable biu clock(ret = %d).\n", ret);
return log_msg_ret("clk", ret);
}
ret = clk_prepare_enable(priv->clks[HI6220_DWMMC_CLK_CIU]);
if (ret) {
dev_err(dev, "Failed to enable ciu clock(ret = %d).\n", ret);
return log_msg_ret("clk", ret);
}
ret = reset_deassert_bulk(&priv->rsts);
if (ret) {
dev_err(dev, "Failed to deassert resets(ret = %d).\n", ret);
return log_msg_ret("rst", ret);
}
host->bus_hz = clk_get_rate(priv->clks[HI6220_DWMMC_CLK_CIU]);
if (host->bus_hz <= 0) {
dev_err(dev, "Failed to get ciu clock rate(ret = %d).\n", ret);
return log_msg_ret("clk", ret);
}
}
dev_dbg(dev, "bus clock rate: %d.\n", host->bus_hz);
dwmci_setup_cfg(&plat->cfg, host, host->bus_hz, 400000);
host->mmc = &plat->mmc;
host->fifo_mode = mmc_data->use_fifo;
host->mmc->priv = &priv->host;
upriv->mmc = host->mmc;
host->mmc->dev = dev;
return dwmci_probe(dev);
}
static int hi6220_dwmmc_bind(struct udevice *dev)
{
struct hi6220_dwmmc_plat *plat = dev_get_plat(dev);
int ret;
ret = dwmci_bind(dev, &plat->mmc, &plat->cfg);
if (ret)
return ret;
return 0;
}
static const struct hisi_mmc_data hi3660_mmc_data = {
.clock = 3200000,
.use_fifo = true,
};
static const struct hisi_mmc_data hi6220_mmc_data = {
.clock = 50000000,
.use_fifo = false,
};
static const struct udevice_id hi6220_dwmmc_ids[] = {
{ .compatible = "hisilicon,hi6220-dw-mshc",
.data = (ulong)&hi6220_mmc_data },
{ .compatible = "hisilicon,hi3798cv200-dw-mshc",
.data = (ulong)&hi6220_mmc_data },
{ .compatible = "hisilicon,hi3798mv200-dw-mshc",
.data = (ulong)&hi6220_mmc_data },
{ .compatible = "hisilicon,hi3660-dw-mshc",
.data = (ulong)&hi3660_mmc_data },
{ }
};
U_BOOT_DRIVER(hi6220_dwmmc_drv) = {
.name = "hi6220_dwmmc",
.id = UCLASS_MMC,
.of_match = hi6220_dwmmc_ids,
.of_to_plat = hi6220_dwmmc_of_to_plat,
.ops = &dm_dwmci_ops,
.bind = hi6220_dwmmc_bind,
.probe = hi6220_dwmmc_probe,
.priv_auto = sizeof(struct hi6220_dwmmc_priv_data),
.plat_auto = sizeof(struct hi6220_dwmmc_plat),
};
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