/*
* Secure Digital Host Controller Interface ACPI driver.
*
* Copyright (c) 2012, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <linux/init.h>
#include <linux/export.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <linux/dma-mapping.h>
#include <linux/compiler.h>
#include <linux/stddef.h>
#include <linux/bitops.h>
#include <linux/types.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/acpi.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/mmc/host.h>
#include <linux/mmc/pm.h>
#include <linux/mmc/sdhci.h>
#include "sdhci.h"
enum {
SDHCI_ACPI_SD_CD = BIT(0),
SDHCI_ACPI_RUNTIME_PM = BIT(1),
};
struct sdhci_acpi_chip {
const struct sdhci_ops *ops;
unsigned int quirks;
unsigned int quirks2;
unsigned long caps;
unsigned int caps2;
mmc_pm_flag_t pm_caps;
};
struct sdhci_acpi_slot {
const struct sdhci_acpi_chip *chip;
unsigned int quirks;
unsigned int quirks2;
unsigned long caps;
unsigned int caps2;
mmc_pm_flag_t pm_caps;
unsigned int flags;
};
struct sdhci_acpi_host {
struct sdhci_host *host;
const struct sdhci_acpi_slot *slot;
struct platform_device *pdev;
bool use_runtime_pm;
};
static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
{
return c->slot && (c->slot->flags & flag);
}
static int sdhci_acpi_enable_dma(struct sdhci_host *host)
{
return 0;
}
static const struct sdhci_ops sdhci_acpi_ops_dflt = {
.enable_dma = sdhci_acpi_enable_dma,
};
static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
.quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
.caps = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD,
.flags = SDHCI_ACPI_RUNTIME_PM,
.pm_caps = MMC_PM_KEEP_POWER,
};
static const struct acpi_device_id sdhci_acpi_ids[] = {
{ "INT33C6", (kernel_ulong_t)&sdhci_acpi_slot_int_sdio },
{ "PNP0D40" },
{ },
};
MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(const char *hid)
{
const struct acpi_device_id *id;
for (id = sdhci_acpi_ids; id->id[0]; id++)
if (!strcmp(id->id, hid))
return (const struct sdhci_acpi_slot *)id->driver_data;
return NULL;
}
static int __devinit sdhci_acpi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
acpi_handle handle = ACPI_HANDLE(dev);
struct acpi_device *device;
struct sdhci_acpi_host *c;
struct sdhci_host *host;
struct resource *iomem;
resource_size_t len;
const char *hid;
int err;
if (acpi_bus_get_device(handle, &device))
return -ENODEV;
if (acpi_bus_get_status(device) || !device->status.present)
return -ENODEV;
hid = acpi_device_hid(device);
iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!iomem)
return -ENOMEM;
len = resource_size(iomem);
if (len < 0x100)
dev_err(dev, "Invalid iomem size!\n");
if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
return -ENOMEM;
host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host));
if (IS_ERR(host))
return PTR_ERR(host);
c = sdhci_priv(host);
c->host = host;
c->slot = sdhci_acpi_get_slot(hid);
c->pdev = pdev;
c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
platform_set_drvdata(pdev, c);
host->hw_name = "ACPI";
host->ops = &sdhci_acpi_ops_dflt;
host->irq = platform_get_irq(pdev, 0);
host->ioaddr = devm_ioremap_nocache(dev, iomem->start,
resource_size(iomem));
if (host->ioaddr == NULL) {
err = -ENOMEM;
goto err_free;
}
if (!dev->dma_mask) {
u64 dma_mask;
if (sdhci_readl(host, SDHCI_CAPABILITIES) & SDHCI_CAN_64BIT) {
/* 64-bit DMA is not supported at present */
dma_mask = DMA_BIT_MASK(32);
} else {
dma_mask = DMA_BIT_MASK(32);
}
dev->dma_mask = &dev->coherent_dma_mask;
dev->coherent_dma_mask = dma_mask;
}
if (c->slot) {
if (c->slot->chip) {
host->ops = c->slot->chip->ops;
host->quirks |= c->slot->chip->quirks;
host->quirks2 |= c->slot->chip->quirks2;
host->mmc->caps |= c->slot->chip->caps;
host->mmc->caps2 |= c->slot->chip->caps2;
host->mmc->pm_caps |= c->slot->chip->pm_caps;
}
host->quirks |= c->slot->quirks;
host->quirks2 |= c->slot->quirks2;
host->mmc->caps |= c->slot->caps;
host->mmc->caps2 |= c->slot->caps2;
host->mmc->pm_caps |= c->slot->pm_caps;
}
err = sdhci_add_host(host);
if (err)
goto err_free;
if (c->use_runtime_pm) {
pm_suspend_ignore_children(dev, 1);
pm_runtime_set_autosuspend_delay(dev, 50);
pm_runtime_use_autosuspend(dev);
pm_runtime_enable(dev);
}
return 0;
err_free:
platform_set_drvdata(pdev, NULL);
sdhci_free_host(c->host);
return err;
}
static int __devexit sdhci_acpi_remove(struct platform_device *pdev)
{
struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
struct device *dev = &pdev->dev;
int dead;
if (c->use_runtime_pm) {
pm_runtime_get_sync(dev);
pm_runtime_disable(dev);
pm_runtime_put_noidle(dev);
}
dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0);
sdhci_remove_host(c->host, dead);
platform_set_drvdata(pdev, NULL);
sdhci_free_host(c->host);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int sdhci_acpi_suspend(struct device *dev)
{
struct sdhci_acpi_host *c = dev_get_drvdata(dev);
return sdhci_suspend_host(c->host);
}
static int sdhci_acpi_resume(struct device *dev)
{
struct sdhci_acpi_host *c = dev_get_drvdata(dev);
return sdhci_resume_host(c->host);
}
#else
#define sdhci_acpi_suspend NULL
#define sdhci_acpi_resume NULL
#endif
#ifdef CONFIG_PM_RUNTIME
static int sdhci_acpi_runtime_suspend(struct device *dev)
{
struct sdhci_acpi_host *c = dev_get_drvdata(dev);
return sdhci_runtime_suspend_host(c->host);
}
static int sdhci_acpi_runtime_resume(struct device *dev)
{
struct sdhci_acpi_host *c = dev_get_drvdata(dev);
return sdhci_runtime_resume_host(c->host);
}
static int sdhci_acpi_runtime_idle(struct device *dev)
{
return 0;
}
#else
#define sdhci_acpi_runtime_suspend NULL
#define sdhci_acpi_runtime_resume NULL
#define sdhci_acpi_runtime_idle NULL
#endif
static const struct dev_pm_ops sdhci_acpi_pm_ops = {
.suspend = sdhci_acpi_suspend,
.resume = sdhci_acpi_resume,
.runtime_suspend = sdhci_acpi_runtime_suspend,
.runtime_resume = sdhci_acpi_runtime_resume,
.runtime_idle = sdhci_acpi_runtime_idle,
};
static struct platform_driver sdhci_acpi_driver = {
.driver = {
.name = "sdhci-acpi",
.owner = THIS_MODULE,
.acpi_match_table = sdhci_acpi_ids,
.pm = &sdhci_acpi_pm_ops,
},
.probe = sdhci_acpi_probe,
.remove = __devexit_p(sdhci_acpi_remove),
};
module_platform_driver(sdhci_acpi_driver);
MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
MODULE_AUTHOR("Adrian Hunter");
MODULE_LICENSE("GPL v2");
