[U-Boot] [PATCH v3 4/5] mmc: rockchip: add SDHCI driver support for rockchip soc

[Kever Yang]

Rockchip rk3399 using arasan sdhci-5.1 controller.
This patch add the controller support to enable mmc device and tested on
rk3399 evb board.

Signed-off-by: Kever Yang <kever.yang at rock-chips.com>
---

Changes in v3: None
Changes in v2: None

 drivers/mmc/Kconfig          |  6 +++++
 drivers/mmc/Makefile         |  1 +
 drivers/mmc/rockchip_sdhci.c | 58 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 65 insertions(+)
 create mode 100644 drivers/mmc/rockchip_sdhci.c

diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index c80efc3..75c2d92 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -52,6 +52,12 @@ config ZYNQ_SDHCI
 	help
 	  Support for Arasan SDHCI host controller on Zynq/ZynqMP ARM SoCs platform
 
+config ROCKCHIP_SDHCI
+	bool "Arasan SDHCI controller for Rockchip support"
+	depends on DM_MMC && OF_CONTROL
+	help
+	  Support for Arasan SDHCI host controller on Rockchip ARM SoCs platform
+
 config MMC_UNIPHIER
 	bool "UniPhier SD/MMC Host Controller support"
 	depends on ARCH_UNIPHIER
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index 3da4817..7cb2ab0 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -53,6 +53,7 @@ obj-$(CONFIG_SPEAR_SDHCI) += spear_sdhci.o
 obj-$(CONFIG_TEGRA_MMC) += tegra_mmc.o
 obj-$(CONFIG_MMC_UNIPHIER) += uniphier-sd.o
 obj-$(CONFIG_ZYNQ_SDHCI) += zynq_sdhci.o
+obj-$(CONFIG_ROCKCHIP_SDHCI) += rockchip_sdhci.o
 
 ifdef CONFIG_SPL_BUILD
 obj-$(CONFIG_SPL_MMC_BOOT) += fsl_esdhc_spl.o
diff --git a/drivers/mmc/rockchip_sdhci.c b/drivers/mmc/rockchip_sdhci.c
new file mode 100644
index 0000000..bee269d
--- /dev/null
+++ b/drivers/mmc/rockchip_sdhci.c
@@ -0,0 +1,58 @@
+/*
+ * (C) Copyright 2016 Fuzhou Rockchip Electronics Co., Ltd
+ *
+ * Rockchip SD Host Controller Interface
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <fdtdec.h>
+#include <libfdt.h>
+#include <malloc.h>
+#include <sdhci.h>
+
+/* 400KHz is max freq for card ID etc. Use that as min */
+#define EMMC_MIN_FREQ	400000
+
+static int arasan_sdhci_probe(struct udevice *dev)
+{
+	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+	struct sdhci_host *host = dev_get_priv(dev);
+
+
+	host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
+	host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD;
+
+	add_sdhci(host, CONFIG_ROCKCHIP_SDHCI_MAX_FREQ, EMMC_MIN_FREQ);
+
+	upriv->mmc = host->mmc;
+	host->mmc->dev = dev;
+
+	return 0;
+}
+
+static int arasan_sdhci_ofdata_to_platdata(struct udevice *dev)
+{
+	struct sdhci_host *host = dev_get_priv(dev);
+
+	host->name = dev->name;
+	host->ioaddr = (void *)dev_get_addr(dev);
+
+	return 0;
+}
+
+static const struct udevice_id arasan_sdhci_ids[] = {
+	{ .compatible = "arasan,sdhci-5.1" },
+	{ }
+};
+
+U_BOOT_DRIVER(arasan_sdhci_drv) = {
+	.name		= "arasan_sdhci",
+	.id		= UCLASS_MMC,
+	.of_match	= arasan_sdhci_ids,
+	.ofdata_to_platdata = arasan_sdhci_ofdata_to_platdata,
+	.probe		= arasan_sdhci_probe,
+	.priv_auto_alloc_size = sizeof(struct sdhci_host),
+};
-- 
1.9.1