nds32: mmc: Support ftsdc010 DM.

Add nds32_mmc to support ftsdc010 dm flow.

Signed-off-by: Rick Chen <rick@andestech.com>

drivers/mmc/Kconfig

@@ -401,6 +401,18 @@ config STM32_SDMMC2
 	  If you have a board based on such a SoC and with a SD/MMC slot,
 	  say Y or M here.
 
+config MMC_NDS32
+	bool "Andestech SD/MMC controller support"
+	depends on DM_MMC && OF_CONTROL && BLK && FTSDC010
+	help
+	  This enables support for the Andestech SD/MMM controller, which is
+	  based on Faraday IP.
+
+config FTSDC010
+	bool "Ftsdc010 SD/MMC controller Support"
+	help
+	  This SD/MMC controller is present in Andestech SoCs which is based on Faraday IP.
+
 endif
 
 config TEGRA124_MMC_DISABLE_EXT_LOOPBACK

drivers/mmc/Makefile

@@ -44,6 +44,7 @@ obj-$(CONFIG_MMC_SANDBOX)		+= sandbox_mmc.o
 obj-$(CONFIG_SH_MMCIF) += sh_mmcif.o
 obj-$(CONFIG_SH_SDHI) += sh_sdhi.o
 obj-$(CONFIG_STM32_SDMMC2) += stm32_sdmmc2.o
+obj-$(CONFIG_MMC_NDS32) += nds32_mmc.o
 
 # SDHCI
 obj-$(CONFIG_MMC_SDHCI)			+= sdhci.o

drivers/mmc/nds32_mmc.c

@@ -0,0 +1,136 @@
+/*
+ * 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),
+};