mmc: tangier: Add Intel Tangier eMMC/SDHCI driver
This patch adds Intel Tangier eMMC/SDHCI driver.
Intel Tangier SoC contains a hybrid of PCI and non-PCI devices. SDHCI
controller is one of the devices which are *not* on a PCI and, hence,
cannot be enumerated by standard PCI means. This driver, allows for
SDHCI controller on Tangier SoC to work in U-Boot.
Signed-off-by: Vincent Tinelli <vincent.tinelli@intel.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index 78091cc..05e0b10 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -325,6 +325,20 @@
If unsure, say N.
+config MMC_SDHCI_TANGIER
+ bool "Tangier SDHCI controller support"
+ depends on DM_MMC && BLK
+ depends on MMC_SDHCI
+ help
+ This selects support for SDHCI controller on Tanginer
+ SoC. Note that this controller does not sit on PCI bus and,
+ hence, cannot be enumerated by standard PCI means.
+
+ If you're using an Intel Tangier SoC (available on Intel
+ Edison board), say Y here.
+
+ If unsure, say N.
+
config MMC_SDHCI_TEGRA
bool "SDHCI platform support for the Tegra SD/MMC Controller"
depends on TEGRA
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index 1e8d23f..6a26a52 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -62,6 +62,7 @@
obj-$(CONFIG_MMC_SDHCI_S5P) += s5p_sdhci.o
obj-$(CONFIG_MMC_SDHCI_SPEAR) += spear_sdhci.o
obj-$(CONFIG_MMC_SDHCI_STI) += sti_sdhci.o
+obj-$(CONFIG_MMC_SDHCI_TANGIER) += tangier_sdhci.o
obj-$(CONFIG_MMC_SDHCI_TEGRA) += tegra_mmc.o
obj-$(CONFIG_MMC_SDHCI_XENON) += xenon_sdhci.o
obj-$(CONFIG_MMC_SDHCI_ZYNQ) += zynq_sdhci.o
diff --git a/drivers/mmc/tangier_sdhci.c b/drivers/mmc/tangier_sdhci.c
new file mode 100644
index 0000000..77b18e7
--- /dev/null
+++ b/drivers/mmc/tangier_sdhci.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2017 Intel Corporation
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#include <common.h>
+#include <dm.h>
+#include <dm/device.h>
+#include <linux/io.h>
+#include <linux/sizes.h>
+#include <malloc.h>
+#include <mmc.h>
+#include <sdhci.h>
+
+#define SDHCI_TANGIER_FMAX 200000000
+#define SDHCI_TANGIER_FMIN 400000
+
+struct sdhci_tangier_plat {
+ struct mmc_config cfg;
+ struct mmc mmc;
+ void __iomem *ioaddr;
+};
+
+static int sdhci_tangier_bind(struct udevice *dev)
+{
+ struct sdhci_tangier_plat *plat = dev_get_platdata(dev);
+
+ return sdhci_bind(dev, &plat->mmc, &plat->cfg);
+}
+
+static int sdhci_tangier_probe(struct udevice *dev)
+{
+ struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+ struct sdhci_tangier_plat *plat = dev_get_platdata(dev);
+ struct sdhci_host *host = dev_get_priv(dev);
+ fdt_addr_t base;
+ int ret;
+
+ base = dev_get_addr(dev);
+ if (base == FDT_ADDR_T_NONE)
+ return -EINVAL;
+
+ plat->ioaddr = devm_ioremap(dev, base, SZ_1K);
+ if (!plat->ioaddr)
+ return -ENOMEM;
+
+ host->name = dev->name;
+ host->ioaddr = plat->ioaddr;
+ host->quirks = SDHCI_QUIRK_NO_HISPD_BIT | SDHCI_QUIRK_BROKEN_VOLTAGE |
+ SDHCI_QUIRK_32BIT_DMA_ADDR | SDHCI_QUIRK_WAIT_SEND_CMD;
+
+ /* MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195 */
+ host->voltages = MMC_VDD_165_195;
+
+ ret = sdhci_setup_cfg(&plat->cfg, host, SDHCI_TANGIER_FMAX,
+ SDHCI_TANGIER_FMIN);
+ if (ret)
+ return ret;
+
+ upriv->mmc = &plat->mmc;
+ host->mmc = &plat->mmc;
+ host->mmc->priv = host;
+
+ return sdhci_probe(dev);
+}
+
+static const struct udevice_id sdhci_tangier_match[] = {
+ { .compatible = "intel,sdhci-tangier" },
+ { /* sentinel */ }
+};
+
+U_BOOT_DRIVER(sdhci_tangier) = {
+ .name = "sdhci-tangier",
+ .id = UCLASS_MMC,
+ .of_match = sdhci_tangier_match,
+ .bind = sdhci_tangier_bind,
+ .probe = sdhci_tangier_probe,
+ .ops = &sdhci_ops,
+ .priv_auto_alloc_size = sizeof(struct sdhci_host),
+ .platdata_auto_alloc_size = sizeof(struct sdhci_tangier_plat),
+};