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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2013 Altera Corporation <www.altera.com>
*/
#include <common.h>
#include <asm/arch/clock_manager.h>
#include <asm/arch/system_manager.h>
#include <clk.h>
#include <dm.h>
#include <dwmmc.h>
#include <errno.h>
#include <fdtdec.h>
#include <linux/libfdt.h>
#include <linux/err.h>
#include <malloc.h>
#include <reset.h>
DECLARE_GLOBAL_DATA_PTR;
struct socfpga_dwmci_plat {
struct mmc_config cfg;
struct mmc mmc;
};
/* socfpga implmentation specific driver private data */
struct dwmci_socfpga_priv_data {
struct dwmci_host host;
unsigned int drvsel;
unsigned int smplsel;
};
static void socfpga_dwmci_reset(struct udevice *dev)
{
struct reset_ctl_bulk reset_bulk;
int ret;
ret = reset_get_bulk(dev, &reset_bulk);
if (ret) {
dev_warn(dev, "Can't get reset: %d\n", ret);
return;
}
reset_deassert_bulk(&reset_bulk);
}
static void socfpga_dwmci_clksel(struct dwmci_host *host)
{
struct dwmci_socfpga_priv_data *priv = host->priv;
u32 sdmmc_mask = ((priv->smplsel & 0x7) << SYSMGR_SDMMC_SMPLSEL_SHIFT) |
((priv->drvsel & 0x7) << SYSMGR_SDMMC_DRVSEL_SHIFT);
/* Disable SDMMC clock. */
clrbits_le32(socfpga_get_clkmgr_addr() + CLKMGR_PERPLL_EN,
CLKMGR_PERPLLGRP_EN_SDMMCCLK_MASK);
debug("%s: drvsel %d smplsel %d\n", __func__,
priv->drvsel, priv->smplsel);
writel(sdmmc_mask, socfpga_get_sysmgr_addr() + SYSMGR_SDMMC);
debug("%s: SYSMGR_SDMMCGRP_CTRL_REG = 0x%x\n", __func__,
readl(socfpga_get_sysmgr_addr() + SYSMGR_SDMMC));
/* Enable SDMMC clock */
setbits_le32(socfpga_get_clkmgr_addr() + CLKMGR_PERPLL_EN,
CLKMGR_PERPLLGRP_EN_SDMMCCLK_MASK);
}
static int socfpga_dwmmc_get_clk_rate(struct udevice *dev)
{
struct dwmci_socfpga_priv_data *priv = dev_get_priv(dev);
struct dwmci_host *host = &priv->host;
#if CONFIG_IS_ENABLED(CLK)
struct clk clk;
int ret;
ret = clk_get_by_index(dev, 1, &clk);
if (ret)
return ret;
host->bus_hz = clk_get_rate(&clk);
clk_free(&clk);
#else
/* Fixed clock divide by 4 which due to the SDMMC wrapper */
host->bus_hz = cm_get_mmc_controller_clk_hz();
#endif
if (host->bus_hz == 0) {
printf("DWMMC: MMC clock is zero!");
return -EINVAL;
}
return 0;
}
static int socfpga_dwmmc_ofdata_to_platdata(struct udevice *dev)
{
struct dwmci_socfpga_priv_data *priv = dev_get_priv(dev);
struct dwmci_host *host = &priv->host;
int fifo_depth;
fifo_depth = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
"fifo-depth", 0);
if (fifo_depth < 0) {
printf("DWMMC: Can't get FIFO depth\n");
return -EINVAL;
}
host->name = dev->name;
host->ioaddr = (void *)devfdt_get_addr(dev);
host->buswidth = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
"bus-width", 4);
host->clksel = socfpga_dwmci_clksel;
/*
* TODO(sjg@chromium.org): Remove the need for this hack.
* We only have one dwmmc block on gen5 SoCFPGA.
*/
host->dev_index = 0;
host->fifoth_val = MSIZE(0x2) |
RX_WMARK(fifo_depth / 2 - 1) | TX_WMARK(fifo_depth / 2);
priv->drvsel = fdtdec_get_uint(gd->fdt_blob, dev_of_offset(dev),
"drvsel", 3);
priv->smplsel = fdtdec_get_uint(gd->fdt_blob, dev_of_offset(dev),
"smplsel", 0);
host->priv = priv;
return 0;
}
static int socfpga_dwmmc_probe(struct udevice *dev)
{
#ifdef CONFIG_BLK
struct socfpga_dwmci_plat *plat = dev_get_platdata(dev);
#endif
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct dwmci_socfpga_priv_data *priv = dev_get_priv(dev);
struct dwmci_host *host = &priv->host;
int ret;
ret = socfpga_dwmmc_get_clk_rate(dev);
if (ret)
return ret;
socfpga_dwmci_reset(dev);
#ifdef CONFIG_BLK
dwmci_setup_cfg(&plat->cfg, host, host->bus_hz, 400000);
host->mmc = &plat->mmc;
#else
ret = add_dwmci(host, host->bus_hz, 400000);
if (ret)
return ret;
#endif
host->mmc->priv = &priv->host;
upriv->mmc = host->mmc;
host->mmc->dev = dev;
return dwmci_probe(dev);
}
static int socfpga_dwmmc_bind(struct udevice *dev)
{
#ifdef CONFIG_BLK
struct socfpga_dwmci_plat *plat = dev_get_platdata(dev);
int ret;
ret = dwmci_bind(dev, &plat->mmc, &plat->cfg);
if (ret)
return ret;
#endif
return 0;
}
static const struct udevice_id socfpga_dwmmc_ids[] = {
{ .compatible = "altr,socfpga-dw-mshc" },
{ }
};
U_BOOT_DRIVER(socfpga_dwmmc_drv) = {
.name = "socfpga_dwmmc",
.id = UCLASS_MMC,
.of_match = socfpga_dwmmc_ids,
.ofdata_to_platdata = socfpga_dwmmc_ofdata_to_platdata,
.ops = &dm_dwmci_ops,
.bind = socfpga_dwmmc_bind,
.probe = socfpga_dwmmc_probe,
.priv_auto_alloc_size = sizeof(struct dwmci_socfpga_priv_data),
.platdata_auto_alloc_size = sizeof(struct socfpga_dwmci_plat),
};
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