mmc: sdhci-acpi: add SDHCI ACPI driver
Add a driver for SDHCI controllers enumerated via ACPI and identified by the ACPI Compatibility ID PNP0D40 (or other SDHCI-specific ACPI hardware IDs in the future). [rjw: Added the changelog.] Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Acked-by: Chris Ball <cjb@laptop.org> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Adrian Hunter
Rafael J. Wysocki
parent
142b007b65
commit
c4e050376c
@ -81,6 +81,18 @@ config MMC_RICOH_MMC
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If unsure, say Y.
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config MMC_SDHCI_ACPI
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tristate "SDHCI support for ACPI enumerated SDHCI controllers"
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depends on MMC_SDHCI && ACPI
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help
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This selects support for ACPI enumerated SDHCI controllers,
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identified by ACPI Compatibility ID PNP0D40 or specific
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ACPI Hardware IDs.
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If you have a controller with this interface, say Y or M here.
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If unsure, say N.
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config MMC_SDHCI_PLTFM
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tristate "SDHCI platform and OF driver helper"
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depends on MMC_SDHCI
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@ -9,6 +9,7 @@ obj-$(CONFIG_MMC_MXS) += mxs-mmc.o
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obj-$(CONFIG_MMC_SDHCI) += sdhci.o
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obj-$(CONFIG_MMC_SDHCI_PCI) += sdhci-pci.o
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obj-$(subst m,y,$(CONFIG_MMC_SDHCI_PCI)) += sdhci-pci-data.o
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obj-$(CONFIG_MMC_SDHCI_ACPI) += sdhci-acpi.o
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obj-$(CONFIG_MMC_SDHCI_PXAV3) += sdhci-pxav3.o
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obj-$(CONFIG_MMC_SDHCI_PXAV2) += sdhci-pxav2.o
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obj-$(CONFIG_MMC_SDHCI_S3C) += sdhci-s3c.o
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304
drivers/mmc/host/sdhci-acpi.c
Normal file
304
drivers/mmc/host/sdhci-acpi.c
Normal file
@ -0,0 +1,304 @@
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/*
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* Secure Digital Host Controller Interface ACPI driver.
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*
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* Copyright (c) 2012, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <linux/init.h>
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#include <linux/export.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/ioport.h>
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#include <linux/io.h>
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#include <linux/dma-mapping.h>
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#include <linux/compiler.h>
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#include <linux/stddef.h>
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#include <linux/bitops.h>
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#include <linux/types.h>
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#include <linux/err.h>
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#include <linux/interrupt.h>
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#include <linux/acpi.h>
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#include <linux/pm.h>
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#include <linux/pm_runtime.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/pm.h>
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#include <linux/mmc/sdhci.h>
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#include "sdhci.h"
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enum {
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SDHCI_ACPI_SD_CD = BIT(0),
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SDHCI_ACPI_RUNTIME_PM = BIT(1),
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};
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struct sdhci_acpi_chip {
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const struct sdhci_ops *ops;
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unsigned int quirks;
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unsigned int quirks2;
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unsigned long caps;
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unsigned int caps2;
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mmc_pm_flag_t pm_caps;
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};
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struct sdhci_acpi_slot {
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const struct sdhci_acpi_chip *chip;
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unsigned int quirks;
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unsigned int quirks2;
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unsigned long caps;
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unsigned int caps2;
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mmc_pm_flag_t pm_caps;
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unsigned int flags;
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};
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struct sdhci_acpi_host {
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struct sdhci_host *host;
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const struct sdhci_acpi_slot *slot;
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struct platform_device *pdev;
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bool use_runtime_pm;
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};
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static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
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{
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return c->slot && (c->slot->flags & flag);
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}
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static int sdhci_acpi_enable_dma(struct sdhci_host *host)
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{
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return 0;
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}
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static const struct sdhci_ops sdhci_acpi_ops_dflt = {
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.enable_dma = sdhci_acpi_enable_dma,
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};
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static const struct acpi_device_id sdhci_acpi_ids[] = {
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{ "PNP0D40" },
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{ },
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};
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MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
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static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(const char *hid)
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{
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const struct acpi_device_id *id;
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for (id = sdhci_acpi_ids; id->id[0]; id++)
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if (!strcmp(id->id, hid))
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return (const struct sdhci_acpi_slot *)id->driver_data;
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return NULL;
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}
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static int __devinit sdhci_acpi_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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acpi_handle handle = ACPI_HANDLE(dev);
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struct acpi_device *device;
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struct sdhci_acpi_host *c;
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struct sdhci_host *host;
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struct resource *iomem;
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resource_size_t len;
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const char *hid;
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int err;
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if (acpi_bus_get_device(handle, &device))
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return -ENODEV;
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if (acpi_bus_get_status(device) || !device->status.present)
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return -ENODEV;
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hid = acpi_device_hid(device);
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iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!iomem)
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return -ENOMEM;
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len = resource_size(iomem);
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if (len < 0x100)
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dev_err(dev, "Invalid iomem size!\n");
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if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
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return -ENOMEM;
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host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host));
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if (IS_ERR(host))
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return PTR_ERR(host);
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c = sdhci_priv(host);
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c->host = host;
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c->slot = sdhci_acpi_get_slot(hid);
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c->pdev = pdev;
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c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
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platform_set_drvdata(pdev, c);
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host->hw_name = "ACPI";
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host->ops = &sdhci_acpi_ops_dflt;
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host->irq = platform_get_irq(pdev, 0);
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host->ioaddr = devm_ioremap_nocache(dev, iomem->start,
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resource_size(iomem));
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if (host->ioaddr == NULL) {
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err = -ENOMEM;
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goto err_free;
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}
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if (!dev->dma_mask) {
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u64 dma_mask;
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if (sdhci_readl(host, SDHCI_CAPABILITIES) & SDHCI_CAN_64BIT) {
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/* 64-bit DMA is not supported at present */
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dma_mask = DMA_BIT_MASK(32);
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} else {
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dma_mask = DMA_BIT_MASK(32);
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}
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dev->dma_mask = &dev->coherent_dma_mask;
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dev->coherent_dma_mask = dma_mask;
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}
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if (c->slot) {
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if (c->slot->chip) {
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host->ops = c->slot->chip->ops;
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host->quirks |= c->slot->chip->quirks;
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host->quirks2 |= c->slot->chip->quirks2;
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host->mmc->caps |= c->slot->chip->caps;
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host->mmc->caps2 |= c->slot->chip->caps2;
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host->mmc->pm_caps |= c->slot->chip->pm_caps;
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}
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host->quirks |= c->slot->quirks;
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host->quirks2 |= c->slot->quirks2;
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host->mmc->caps |= c->slot->caps;
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host->mmc->caps2 |= c->slot->caps2;
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host->mmc->pm_caps |= c->slot->pm_caps;
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}
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err = sdhci_add_host(host);
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if (err)
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goto err_free;
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if (c->use_runtime_pm) {
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pm_suspend_ignore_children(dev, 1);
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pm_runtime_set_autosuspend_delay(dev, 50);
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pm_runtime_use_autosuspend(dev);
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pm_runtime_enable(dev);
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}
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return 0;
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err_free:
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platform_set_drvdata(pdev, NULL);
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sdhci_free_host(c->host);
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return err;
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}
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static int __devexit sdhci_acpi_remove(struct platform_device *pdev)
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{
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struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
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struct device *dev = &pdev->dev;
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int dead;
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if (c->use_runtime_pm) {
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pm_runtime_get_sync(dev);
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pm_runtime_disable(dev);
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pm_runtime_put_noidle(dev);
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}
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dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0);
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sdhci_remove_host(c->host, dead);
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platform_set_drvdata(pdev, NULL);
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sdhci_free_host(c->host);
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return 0;
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}
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#ifdef CONFIG_PM_SLEEP
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static int sdhci_acpi_suspend(struct device *dev)
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{
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struct sdhci_acpi_host *c = dev_get_drvdata(dev);
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return sdhci_suspend_host(c->host);
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}
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static int sdhci_acpi_resume(struct device *dev)
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{
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struct sdhci_acpi_host *c = dev_get_drvdata(dev);
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return sdhci_resume_host(c->host);
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}
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#else
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#define sdhci_acpi_suspend NULL
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#define sdhci_acpi_resume NULL
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#endif
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#ifdef CONFIG_PM_RUNTIME
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static int sdhci_acpi_runtime_suspend(struct device *dev)
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{
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struct sdhci_acpi_host *c = dev_get_drvdata(dev);
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return sdhci_runtime_suspend_host(c->host);
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}
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static int sdhci_acpi_runtime_resume(struct device *dev)
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{
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struct sdhci_acpi_host *c = dev_get_drvdata(dev);
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return sdhci_runtime_resume_host(c->host);
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}
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static int sdhci_acpi_runtime_idle(struct device *dev)
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{
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return 0;
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}
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#else
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#define sdhci_acpi_runtime_suspend NULL
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#define sdhci_acpi_runtime_resume NULL
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#define sdhci_acpi_runtime_idle NULL
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#endif
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static const struct dev_pm_ops sdhci_acpi_pm_ops = {
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.suspend = sdhci_acpi_suspend,
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.resume = sdhci_acpi_resume,
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.runtime_suspend = sdhci_acpi_runtime_suspend,
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.runtime_resume = sdhci_acpi_runtime_resume,
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.runtime_idle = sdhci_acpi_runtime_idle,
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};
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static struct platform_driver sdhci_acpi_driver = {
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.driver = {
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.name = "sdhci-acpi",
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.owner = THIS_MODULE,
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.acpi_match_table = sdhci_acpi_ids,
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.pm = &sdhci_acpi_pm_ops,
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},
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.probe = sdhci_acpi_probe,
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.remove = __devexit_p(sdhci_acpi_remove),
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};
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module_platform_driver(sdhci_acpi_driver);
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MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
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MODULE_AUTHOR("Adrian Hunter");
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MODULE_LICENSE("GPL v2");
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