[mirror_ubuntu-zesty-kernel.git] / drivers / mmc / host / sdhci-acpi.c

/*
 * 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/delay.h>

#include <linux/mmc/host.h>
#include <linux/mmc/pm.h>
#include <linux/mmc/slot-gpio.h>
#include <linux/mmc/sdhci.h>

#include "sdhci.h"

enum {
	SDHCI_ACPI_SD_CD		= BIT(0),
	SDHCI_ACPI_RUNTIME_PM		= BIT(1),
	SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL	= BIT(2),
};

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 void sdhci_acpi_int_hw_reset(struct sdhci_host *host)
{
	u8 reg;

	reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
	reg |= 0x10;
	sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
	/* For eMMC, minimum is 1us but give it 9us for good measure */
	udelay(9);
	reg &= ~0x10;
	sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
	/* For eMMC, minimum is 200us but give it 300us for good measure */
	usleep_range(300, 1000);
}

static const struct sdhci_ops sdhci_acpi_ops_dflt = {
	.enable_dma = sdhci_acpi_enable_dma,
};

static const struct sdhci_ops sdhci_acpi_ops_int = {
	.enable_dma = sdhci_acpi_enable_dma,
	.hw_reset   = sdhci_acpi_int_hw_reset,
};

static const struct sdhci_acpi_chip sdhci_acpi_chip_int = {
	.ops = &sdhci_acpi_ops_int,
};

static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
	.chip    = &sdhci_acpi_chip_int,
	.caps    = MMC_CAP_8_BIT_DATA | MMC_CAP_NONREMOVABLE | MMC_CAP_HW_RESET,
	.caps2   = MMC_CAP2_HC_ERASE_SZ,
	.flags   = SDHCI_ACPI_RUNTIME_PM,
};

static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
	.quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
	.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 sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
	.flags   = SDHCI_ACPI_SD_CD | SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL |
		   SDHCI_ACPI_RUNTIME_PM,
	.quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON,
};

struct sdhci_acpi_uid_slot {
	const char *hid;
	const char *uid;
	const struct sdhci_acpi_slot *slot;
};

static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = {
	{ "80860F14" , "1" , &sdhci_acpi_slot_int_emmc },
	{ "80860F14" , "3" , &sdhci_acpi_slot_int_sd   },
	{ "80860F16" , NULL, &sdhci_acpi_slot_int_sd   },
	{ "INT33BB"  , "2" , &sdhci_acpi_slot_int_sdio },
	{ "INT33C6"  , NULL, &sdhci_acpi_slot_int_sdio },
	{ "INT3436"  , NULL, &sdhci_acpi_slot_int_sdio },
	{ "PNP0D40"  },
	{ },
};

static const struct acpi_device_id sdhci_acpi_ids[] = {
	{ "80860F14" },
	{ "80860F16" },
	{ "INT33BB"  },
	{ "INT33C6"  },
	{ "INT3436"  },
	{ "PNP0D40"  },
	{ },
};
MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);

static const struct sdhci_acpi_slot *sdhci_acpi_get_slot_by_ids(const char *hid,
								const char *uid)
{
	const struct sdhci_acpi_uid_slot *u;

	for (u = sdhci_acpi_uids; u->hid; u++) {
		if (strcmp(u->hid, hid))
			continue;
		if (!u->uid)
			return u->slot;
		if (uid && !strcmp(u->uid, uid))
			return u->slot;
	}
	return NULL;
}

static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(acpi_handle handle,
							 const char *hid)
{
	const struct sdhci_acpi_slot *slot;
	struct acpi_device_info *info;
	const char *uid = NULL;
	acpi_status status;

	status = acpi_get_object_info(handle, &info);
	if (!ACPI_FAILURE(status) && (info->valid & ACPI_VALID_UID))
		uid = info->unique_id.string;

	slot = sdhci_acpi_get_slot_by_ids(hid, uid);

	kfree(info);
	return slot;
}

static int 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(handle, 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);
		}

		err = dma_coerce_mask_and_coherent(dev, dma_mask);
		if (err)
			goto err_free;
	}

	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;
	}

	host->mmc->caps2 |= MMC_CAP2_NO_PRESCAN_POWERUP;

	if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
		bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL);

		if (mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0)) {
			dev_warn(dev, "failed to setup card detect gpio\n");
			c->use_runtime_pm = false;
		}
	}

	err = sdhci_add_host(host);
	if (err)
		goto err_free;

	if (c->use_runtime_pm) {
		pm_runtime_set_active(dev);
		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:
	sdhci_free_host(c->host);
	return err;
}

static int 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);
	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	= 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");
Commit	Line	Data
c4e05037 AH	1	/*
	2	* Secure Digital Host Controller Interface ACPI driver.
	3	*
	4	* Copyright (c) 2012, Intel Corporation.
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms and conditions of the GNU General Public License,
	8	* version 2, as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope it will be useful, but WITHOUT
	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	13	* more details.
	14	*
	15	* You should have received a copy of the GNU General Public License along with
	16	* this program; if not, write to the Free Software Foundation, Inc.,
	17	* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
	18	*
	19	*/
	20
	21	#include <linux/init.h>
	22	#include <linux/export.h>
	23	#include <linux/module.h>
	24	#include <linux/device.h>
	25	#include <linux/platform_device.h>
	26	#include <linux/ioport.h>
	27	#include <linux/io.h>
	28	#include <linux/dma-mapping.h>
	29	#include <linux/compiler.h>
	30	#include <linux/stddef.h>
	31	#include <linux/bitops.h>
	32	#include <linux/types.h>
	33	#include <linux/err.h>
	34	#include <linux/interrupt.h>
	35	#include <linux/acpi.h>
	36	#include <linux/pm.h>
	37	#include <linux/pm_runtime.h>
b04fa064	38	#include <linux/delay.h>
c4e05037 AH	39
	40	#include <linux/mmc/host.h>
	41	#include <linux/mmc/pm.h>
4fd4409c	42	#include <linux/mmc/slot-gpio.h>
c4e05037 AH	43	#include <linux/mmc/sdhci.h>
	44
	45	#include "sdhci.h"
	46
	47	enum {
4fd4409c AH	48	SDHCI_ACPI_SD_CD = BIT(0),
	49	SDHCI_ACPI_RUNTIME_PM = BIT(1),
	50	SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL = BIT(2),
c4e05037 AH	51	};
	52
	53	struct sdhci_acpi_chip {
	54	const struct sdhci_ops *ops;
	55	unsigned int quirks;
	56	unsigned int quirks2;
	57	unsigned long caps;
	58	unsigned int caps2;
	59	mmc_pm_flag_t pm_caps;
	60	};
	61
	62	struct sdhci_acpi_slot {
	63	const struct sdhci_acpi_chip *chip;
	64	unsigned int quirks;
	65	unsigned int quirks2;
	66	unsigned long caps;
	67	unsigned int caps2;
	68	mmc_pm_flag_t pm_caps;
	69	unsigned int flags;
	70	};
	71
	72	struct sdhci_acpi_host {
	73	struct sdhci_host *host;
	74	const struct sdhci_acpi_slot *slot;
	75	struct platform_device *pdev;
	76	bool use_runtime_pm;
	77	};
	78
	79	static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
	80	{
	81	return c->slot && (c->slot->flags & flag);
	82	}
	83
	84	static int sdhci_acpi_enable_dma(struct sdhci_host *host)
	85	{
	86	return 0;
	87	}
	88
b04fa064 AH	89	static void sdhci_acpi_int_hw_reset(struct sdhci_host *host)
	90	{
	91	u8 reg;
	92
	93	reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
	94	reg \|= 0x10;
	95	sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
	96	/* For eMMC, minimum is 1us but give it 9us for good measure */
	97	udelay(9);
	98	reg &= ~0x10;
	99	sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
	100	/* For eMMC, minimum is 200us but give it 300us for good measure */
	101	usleep_range(300, 1000);
	102	}
	103
c4e05037 AH	104	static const struct sdhci_ops sdhci_acpi_ops_dflt = {
	105	.enable_dma = sdhci_acpi_enable_dma,
	106	};
	107
b04fa064 AH	108	static const struct sdhci_ops sdhci_acpi_ops_int = {
	109	.enable_dma = sdhci_acpi_enable_dma,
	110	.hw_reset = sdhci_acpi_int_hw_reset,
	111	};
	112
	113	static const struct sdhci_acpi_chip sdhci_acpi_chip_int = {
	114	.ops = &sdhci_acpi_ops_int,
	115	};
	116
07a58883	117	static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
b04fa064 AH	118	.chip = &sdhci_acpi_chip_int,
b04fa064 AH	119	.caps = MMC_CAP_8_BIT_DATA \| MMC_CAP_NONREMOVABLE \| MMC_CAP_HW_RESET,
07a58883 AH	120	.caps2 = MMC_CAP2_HC_ERASE_SZ,
	121	.flags = SDHCI_ACPI_RUNTIME_PM,
	122	};
	123
e5571397	124	static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
c6748017	125	.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
e5571397 AH	126	.quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
	127	.caps = MMC_CAP_NONREMOVABLE \| MMC_CAP_POWER_OFF_CARD,
	128	.flags = SDHCI_ACPI_RUNTIME_PM,
	129	.pm_caps = MMC_PM_KEEP_POWER,
	130	};
	131
07a58883	132	static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
4fd4409c AH	133	.flags = SDHCI_ACPI_SD_CD \| SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL \|
4fd4409c AH	134	SDHCI_ACPI_RUNTIME_PM,
a61abe6e	135	.quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON,
07a58883 AH	136	};
	137
	138	struct sdhci_acpi_uid_slot {
	139	const char *hid;
	140	const char *uid;
	141	const struct sdhci_acpi_slot *slot;
	142	};
	143
	144	static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = {
	145	{ "80860F14" , "1" , &sdhci_acpi_slot_int_emmc },
	146	{ "80860F14" , "3" , &sdhci_acpi_slot_int_sd },
aad95dc4	147	{ "80860F16" , NULL, &sdhci_acpi_slot_int_sd },
07a58883 AH	148	{ "INT33BB" , "2" , &sdhci_acpi_slot_int_sdio },
07a58883 AH	149	{ "INT33C6" , NULL, &sdhci_acpi_slot_int_sdio },
07c001c1	150	{ "INT3436" , NULL, &sdhci_acpi_slot_int_sdio },
07a58883 AH	151	{ "PNP0D40" },
	152	{ },
	153	};
	154
c4e05037	155	static const struct acpi_device_id sdhci_acpi_ids[] = {
07a58883	156	{ "80860F14" },
aad95dc4	157	{ "80860F16" },
07a58883 AH	158	{ "INT33BB" },
07a58883 AH	159	{ "INT33C6" },
07c001c1	160	{ "INT3436" },
07a58883	161	{ "PNP0D40" },
c4e05037 AH	162	{ },
	163	};
	164	MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
	165
07a58883 AH	166	static const struct sdhci_acpi_slot sdhci_acpi_get_slot_by_ids(const char hid,
07a58883 AH	167	const char *uid)
c4e05037	168	{
07a58883 AH	169	const struct sdhci_acpi_uid_slot *u;
	170
	171	for (u = sdhci_acpi_uids; u->hid; u++) {
	172	if (strcmp(u->hid, hid))
	173	continue;
	174	if (!u->uid)
	175	return u->slot;
	176	if (uid && !strcmp(u->uid, uid))
	177	return u->slot;
	178	}
c4e05037 AH	179	return NULL;
	180	}
	181
07a58883 AH	182	static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(acpi_handle handle,
	183	const char *hid)
	184	{
	185	const struct sdhci_acpi_slot *slot;
	186	struct acpi_device_info *info;
	187	const char *uid = NULL;
	188	acpi_status status;
	189
	190	status = acpi_get_object_info(handle, &info);
	191	if (!ACPI_FAILURE(status) && (info->valid & ACPI_VALID_UID))
	192	uid = info->unique_id.string;
	193
	194	slot = sdhci_acpi_get_slot_by_ids(hid, uid);
	195
	196	kfree(info);
	197	return slot;
	198	}
	199
4e608e4e	200	static int sdhci_acpi_probe(struct platform_device *pdev)
c4e05037 AH	201	{
	202	struct device *dev = &pdev->dev;
	203	acpi_handle handle = ACPI_HANDLE(dev);
	204	struct acpi_device *device;
	205	struct sdhci_acpi_host *c;
	206	struct sdhci_host *host;
	207	struct resource *iomem;
	208	resource_size_t len;
	209	const char *hid;
87875655	210	int err;
c4e05037 AH	211
	212	if (acpi_bus_get_device(handle, &device))
	213	return -ENODEV;
	214
	215	if (acpi_bus_get_status(device) \|\| !device->status.present)
	216	return -ENODEV;
	217
	218	hid = acpi_device_hid(device);
	219
	220	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	221	if (!iomem)
	222	return -ENOMEM;
	223
	224	len = resource_size(iomem);
	225	if (len < 0x100)
	226	dev_err(dev, "Invalid iomem size!\n");
	227
	228	if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
	229	return -ENOMEM;
	230
	231	host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host));
	232	if (IS_ERR(host))
	233	return PTR_ERR(host);
	234
	235	c = sdhci_priv(host);
	236	c->host = host;
07a58883	237	c->slot = sdhci_acpi_get_slot(handle, hid);
c4e05037 AH	238	c->pdev = pdev;
	239	c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
	240
	241	platform_set_drvdata(pdev, c);
	242
	243	host->hw_name = "ACPI";
	244	host->ops = &sdhci_acpi_ops_dflt;
	245	host->irq = platform_get_irq(pdev, 0);
	246
	247	host->ioaddr = devm_ioremap_nocache(dev, iomem->start,
	248	resource_size(iomem));
	249	if (host->ioaddr == NULL) {
	250	err = -ENOMEM;
	251	goto err_free;
	252	}
	253
	254	if (!dev->dma_mask) {
	255	u64 dma_mask;
	256
	257	if (sdhci_readl(host, SDHCI_CAPABILITIES) & SDHCI_CAN_64BIT) {
	258	/* 64-bit DMA is not supported at present */
	259	dma_mask = DMA_BIT_MASK(32);
	260	} else {
	261	dma_mask = DMA_BIT_MASK(32);
	262	}
	263
07f4450c RK	264	err = dma_coerce_mask_and_coherent(dev, dma_mask);
	265	if (err)
	266	goto err_free;
c4e05037 AH	267	}
	268
	269	if (c->slot) {
	270	if (c->slot->chip) {
	271	host->ops = c->slot->chip->ops;
	272	host->quirks \|= c->slot->chip->quirks;
	273	host->quirks2 \|= c->slot->chip->quirks2;
	274	host->mmc->caps \|= c->slot->chip->caps;
	275	host->mmc->caps2 \|= c->slot->chip->caps2;
	276	host->mmc->pm_caps \|= c->slot->chip->pm_caps;
	277	}
	278	host->quirks \|= c->slot->quirks;
	279	host->quirks2 \|= c->slot->quirks2;
	280	host->mmc->caps \|= c->slot->caps;
	281	host->mmc->caps2 \|= c->slot->caps2;
	282	host->mmc->pm_caps \|= c->slot->pm_caps;
	283	}
	284
0d3e3350 AH	285	host->mmc->caps2 \|= MMC_CAP2_NO_PRESCAN_POWERUP;
0d3e3350 AH	286
a61abe6e	287	if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
4fd4409c AH	288	bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL);
	289
	290	if (mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0)) {
	291	dev_warn(dev, "failed to setup card detect gpio\n");
a61abe6e	292	c->use_runtime_pm = false;
4fd4409c	293	}
a61abe6e AH	294	}
a61abe6e AH	295
4fd4409c AH	296	err = sdhci_add_host(host);
	297	if (err)
	298	goto err_free;
	299
c4e05037	300	if (c->use_runtime_pm) {
1d1ff458	301	pm_runtime_set_active(dev);
c4e05037 AH	302	pm_suspend_ignore_children(dev, 1);
	303	pm_runtime_set_autosuspend_delay(dev, 50);
	304	pm_runtime_use_autosuspend(dev);
	305	pm_runtime_enable(dev);
	306	}
	307
	308	return 0;
	309
	310	err_free:
c4e05037 AH	311	sdhci_free_host(c->host);
	312	return err;
	313	}
	314
4e608e4e	315	static int sdhci_acpi_remove(struct platform_device *pdev)
c4e05037 AH	316	{
	317	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	318	struct device *dev = &pdev->dev;
	319	int dead;
	320
	321	if (c->use_runtime_pm) {
	322	pm_runtime_get_sync(dev);
	323	pm_runtime_disable(dev);
	324	pm_runtime_put_noidle(dev);
	325	}
	326
	327	dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0);
	328	sdhci_remove_host(c->host, dead);
c4e05037 AH	329	sdhci_free_host(c->host);
	330
	331	return 0;
	332	}
	333
	334	#ifdef CONFIG_PM_SLEEP
	335
	336	static int sdhci_acpi_suspend(struct device *dev)
	337	{
	338	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
	339
	340	return sdhci_suspend_host(c->host);
	341	}
	342
	343	static int sdhci_acpi_resume(struct device *dev)
	344	{
	345	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
	346
	347	return sdhci_resume_host(c->host);
	348	}
	349
	350	#else
	351
	352	#define sdhci_acpi_suspend NULL
	353	#define sdhci_acpi_resume NULL
	354
	355	#endif
	356
	357	#ifdef CONFIG_PM_RUNTIME
	358
	359	static int sdhci_acpi_runtime_suspend(struct device *dev)
	360	{
	361	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
	362
	363	return sdhci_runtime_suspend_host(c->host);
	364	}
	365
	366	static int sdhci_acpi_runtime_resume(struct device *dev)
	367	{
	368	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
	369
	370	return sdhci_runtime_resume_host(c->host);
	371	}
	372
	373	static int sdhci_acpi_runtime_idle(struct device *dev)
	374	{
	375	return 0;
	376	}
	377
	378	#else
	379
	380	#define sdhci_acpi_runtime_suspend NULL
	381	#define sdhci_acpi_runtime_resume NULL
	382	#define sdhci_acpi_runtime_idle NULL
	383
	384	#endif
	385
	386	static const struct dev_pm_ops sdhci_acpi_pm_ops = {
	387	.suspend = sdhci_acpi_suspend,
	388	.resume = sdhci_acpi_resume,
	389	.runtime_suspend = sdhci_acpi_runtime_suspend,
	390	.runtime_resume = sdhci_acpi_runtime_resume,
	391	.runtime_idle = sdhci_acpi_runtime_idle,
	392	};
393
394	static struct platform_driver sdhci_acpi_driver = {
395	.driver = {
396	.name = "sdhci-acpi",
397	.owner = THIS_MODULE,
398	.acpi_match_table = sdhci_acpi_ids,
399	.pm = &sdhci_acpi_pm_ops,
400	},
401	.probe = sdhci_acpi_probe,
4e608e4e	402	.remove = sdhci_acpi_remove,
c4e05037 AH	403	};
	404
	405	module_platform_driver(sdhci_acpi_driver);
	406
	407	MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
	408	MODULE_AUTHOR("Adrian Hunter");
	409	MODULE_LICENSE("GPL v2");