Merge branch 'master' of git://git.denx.de/u-boot-atmel

2 files changed, 133 insertions, 0 deletions

diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index dc8f2b6852e..3616deedf37 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -34,6 +34,16 @@ config MSM_SDHCI
           SD 3.0 specifications. Both SD and eMMC devices are supported.
 	  Card-detect gpios are not supported.
 
+config ATMEL_SDHCI
+	bool "Atmel SDHCI controller support"
+	depends on DM_MMC && BLK && DM_MMC_OPS && ARCH_AT91
+	help
+	  This enables support for the Atmel SDHCI controller, which supports
+	  the embedded MultiMedia Card (e.MMC) Specification V4.51, the SD
+	  Memory Card Specification V3.0, and the SDIO V3.0 specification.
+	  It is compliant with the SD Host Controller Standard V3.0
+	  specification.
+
 config ROCKCHIP_DWMMC
 	bool "Rockchip SD/MMC controller support"
 	depends on DM_MMC && OF_CONTROL
diff --git a/drivers/mmc/atmel_sdhci.c b/drivers/mmc/atmel_sdhci.c
index 24b68b640bb..dd6bd33515c 100644
--- a/drivers/mmc/atmel_sdhci.c
+++ b/drivers/mmc/atmel_sdhci.c
@@ -6,12 +6,15 @@
  */
 
 #include <common.h>
+#include <clk.h>
+#include <dm.h>
 #include <malloc.h>
 #include <sdhci.h>
 #include <asm/arch/clk.h>
 
 #define ATMEL_SDHC_MIN_FREQ	400000
 
+#ifndef CONFIG_DM_MMC
 int atmel_sdhci_init(void *regbase, u32 id)
 {
 	struct sdhci_host *host;
@@ -38,3 +41,123 @@ int atmel_sdhci_init(void *regbase, u32 id)
 
 	return 0;
 }
+
+#else
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct atmel_sdhci_plat {
+	struct mmc_config cfg;
+	struct mmc mmc;
+};
+
+static int atmel_sdhci_get_clk(struct udevice *dev, int index, struct clk *clk)
+{
+	struct udevice *dev_clk;
+	int periph, ret;
+
+	ret = clk_get_by_index(dev, index, clk);
+	if (ret)
+		return ret;
+
+	periph = fdtdec_get_uint(gd->fdt_blob, clk->dev->of_offset, "reg", -1);
+	if (periph < 0)
+		return -EINVAL;
+
+	dev_clk = dev_get_parent(clk->dev);
+	ret = clk_request(dev_clk, clk);
+	if (ret)
+		return ret;
+
+	clk->id = periph;
+
+	return 0;
+}
+
+static int atmel_sdhci_probe(struct udevice *dev)
+{
+	struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+	struct atmel_sdhci_plat *plat = dev_get_platdata(dev);
+	struct sdhci_host *host = dev_get_priv(dev);
+	u32 max_clk;
+	u32 caps, caps_1;
+	u32 clk_base, clk_mul;
+	ulong gck_rate;
+	struct clk clk;
+	int ret;
+
+	ret = atmel_sdhci_get_clk(dev, 0, &clk);
+	if (ret)
+		return ret;
+
+	ret = clk_enable(&clk);
+	if (ret)
+		return ret;
+
+	host->name = dev->name;
+	host->ioaddr = (void *)dev_get_addr(dev);
+
+	host->quirks = 0;
+	host->bus_width	= fdtdec_get_int(gd->fdt_blob, dev->of_offset,
+					 "bus-width", 4);
+
+	caps = sdhci_readl(host, SDHCI_CAPABILITIES);
+	clk_base = (caps & SDHCI_CLOCK_V3_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
+	caps_1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
+	clk_mul = (caps_1 & SDHCI_CLOCK_MUL_MASK) >> SDHCI_CLOCK_MUL_SHIFT;
+	gck_rate = clk_base * 1000000 * (clk_mul + 1);
+
+	ret = atmel_sdhci_get_clk(dev, 1, &clk);
+	if (ret)
+		return ret;
+
+	ret = clk_set_rate(&clk, gck_rate);
+	if (ret)
+		return ret;
+
+	max_clk = clk_get_rate(&clk);
+	if (!max_clk)
+		return -EINVAL;
+
+	ret = sdhci_setup_cfg(&plat->cfg, host, max_clk, ATMEL_SDHC_MIN_FREQ);
+	if (ret)
+		return ret;
+
+	host->mmc = &plat->mmc;
+	host->mmc->dev = dev;
+	host->mmc->priv = host;
+	upriv->mmc = host->mmc;
+
+	clk_free(&clk);
+
+	return sdhci_probe(dev);
+}
+
+static int atmel_sdhci_bind(struct udevice *dev)
+{
+	struct atmel_sdhci_plat *plat = dev_get_platdata(dev);
+	int ret;
+
+	ret = sdhci_bind(dev, &plat->mmc, &plat->cfg);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static const struct udevice_id atmel_sdhci_ids[] = {
+	{ .compatible = "atmel,sama5d2-sdhci" },
+	{ }
+};
+
+U_BOOT_DRIVER(atmel_sdhci_drv) = {
+	.name		= "atmel_sdhci",
+	.id		= UCLASS_MMC,
+	.of_match	= atmel_sdhci_ids,
+	.ops		= &sdhci_ops,
+	.bind		= atmel_sdhci_bind,
+	.probe		= atmel_sdhci_probe,
+	.priv_auto_alloc_size = sizeof(struct sdhci_host),
+	.platdata_auto_alloc_size = sizeof(struct atmel_sdhci_plat),
+};
+#endif