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mmc: tangier: Add Intel Tangier eMMC/SDHCI driver

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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>
This commit is contained in:
Felipe Balbi 2017-02-20 14:24:14 +03:00 committed by Stefan Roese
parent ac9c4912c0
commit aff32df522
3 changed files with 96 additions and 0 deletions
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14
drivers/mmc/Kconfig
View file

@ -325,6 +325,20 @@ config MMC_SDHCI_XENON
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

1
drivers/mmc/Makefile
View file

@ -62,6 +62,7 @@ obj-$(CONFIG_MMC_SDHCI_ROCKCHIP) += rockchip_sdhci.o
obj-$(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

81
drivers/mmc/tangier_sdhci.c Normal file
View file

@ -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),
};