[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;
	int (*probe_slot)(struct platform_device *, const char *, const char *);
	int (*remove_slot)(struct platform_device *);
};

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 = {
	.set_clock = sdhci_set_clock,
	.enable_dma = sdhci_acpi_enable_dma,
	.set_bus_width = sdhci_set_bus_width,
	.reset = sdhci_reset,
	.set_uhs_signaling = sdhci_set_uhs_signaling,
};

static const struct sdhci_ops sdhci_acpi_ops_int = {
	.set_clock = sdhci_set_clock,
	.enable_dma = sdhci_acpi_enable_dma,
	.set_bus_width = sdhci_set_bus_width,
	.reset = sdhci_reset,
	.set_uhs_signaling = sdhci_set_uhs_signaling,
	.hw_reset   = sdhci_acpi_int_hw_reset,
};

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

static int sdhci_acpi_emmc_probe_slot(struct platform_device *pdev,
				      const char *hid, const char *uid)
{
	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	struct sdhci_host *host;

	if (!c || !c->host)
		return 0;

	host = c->host;

	/* Platform specific code during emmc proble slot goes here */

	if (hid && uid && !strcmp(hid, "80860F14") && !strcmp(uid, "1") &&
	    sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 &&
	    sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807)
		host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */

	return 0;
}

static int sdhci_acpi_sdio_probe_slot(struct platform_device *pdev,
				      const char *hid, const char *uid)
{
	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	struct sdhci_host *host;

	if (!c || !c->host)
		return 0;

	host = c->host;

	/* Platform specific code during emmc proble slot goes here */

	return 0;
}

static int sdhci_acpi_sd_probe_slot(struct platform_device *pdev,
				    const char *hid, const char *uid)
{
	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	struct sdhci_host *host;

	if (!c || !c->host || !c->slot)
		return 0;

	host = c->host;

	/* Platform specific code during emmc proble slot goes here */

	return 0;
}

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 | MMC_CAP_1_8V_DDR,
	.caps2   = MMC_CAP2_HC_ERASE_SZ,
	.flags   = SDHCI_ACPI_RUNTIME_PM,
	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN | SDHCI_QUIRK2_STOP_WITH_TC,
	.probe_slot	= sdhci_acpi_emmc_probe_slot,
};

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,
	.probe_slot	= sdhci_acpi_sdio_probe_slot,
};

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 |
		   SDHCI_QUIRK2_STOP_WITH_TC,
	.probe_slot	= sdhci_acpi_sd_probe_slot,
};

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 },
	{ "INT33BB"  , "3" , &sdhci_acpi_slot_int_sd },
	{ "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(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 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;
	const char *uid;
	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);
	uid = device->pnp.unique_id;

	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, uid);
	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->probe_slot) {
			err = c->slot->probe_slot(pdev, hid, uid);
			if (err)
				goto err_free;
		}
		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, NULL)) {
			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);
	}

	if (c->slot && c->slot->remove_slot)
		c->slot->remove_slot(pdev);

	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;
}

#endif

static const struct dev_pm_ops sdhci_acpi_pm_ops = {
	.suspend		= sdhci_acpi_suspend,
	.resume			= sdhci_acpi_resume,
	SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend,
			sdhci_acpi_runtime_resume, 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
	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>
	38	#include <linux/delay.h>
	39
	40	#include <linux/mmc/host.h>
	41	#include <linux/mmc/pm.h>
	42	#include <linux/mmc/slot-gpio.h>
	43	#include <linux/mmc/sdhci.h>
	44
	45	#include "sdhci.h"
	46
	47	enum {
	48	SDHCI_ACPI_SD_CD = BIT(0),
	49	SDHCI_ACPI_RUNTIME_PM = BIT(1),
	50	SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL = BIT(2),
	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	int (probe_slot)(struct platform_device , const char , const char );
	71	int (remove_slot)(struct platform_device );
	72	};
	73
	74	struct sdhci_acpi_host {
	75	struct sdhci_host *host;
	76	const struct sdhci_acpi_slot *slot;
	77	struct platform_device *pdev;
	78	bool use_runtime_pm;
	79	};
	80
	81	static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
	82	{
	83	return c->slot && (c->slot->flags & flag);
	84	}
	85
	86	static int sdhci_acpi_enable_dma(struct sdhci_host *host)
	87	{
	88	return 0;
	89	}
	90
	91	static void sdhci_acpi_int_hw_reset(struct sdhci_host *host)
	92	{
	93	u8 reg;
	94
	95	reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
	96	reg \|= 0x10;
	97	sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
	98	/* For eMMC, minimum is 1us but give it 9us for good measure */
	99	udelay(9);
	100	reg &= ~0x10;
	101	sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
	102	/* For eMMC, minimum is 200us but give it 300us for good measure */
	103	usleep_range(300, 1000);
	104	}
	105
	106	static const struct sdhci_ops sdhci_acpi_ops_dflt = {
	107	.set_clock = sdhci_set_clock,
	108	.enable_dma = sdhci_acpi_enable_dma,
	109	.set_bus_width = sdhci_set_bus_width,
	110	.reset = sdhci_reset,
	111	.set_uhs_signaling = sdhci_set_uhs_signaling,
	112	};
	113
	114	static const struct sdhci_ops sdhci_acpi_ops_int = {
	115	.set_clock = sdhci_set_clock,
	116	.enable_dma = sdhci_acpi_enable_dma,
	117	.set_bus_width = sdhci_set_bus_width,
	118	.reset = sdhci_reset,
	119	.set_uhs_signaling = sdhci_set_uhs_signaling,
	120	.hw_reset = sdhci_acpi_int_hw_reset,
	121	};
	122
	123	static const struct sdhci_acpi_chip sdhci_acpi_chip_int = {
	124	.ops = &sdhci_acpi_ops_int,
	125	};
	126
	127	static int sdhci_acpi_emmc_probe_slot(struct platform_device *pdev,
	128	const char hid, const char uid)
	129	{
	130	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	131	struct sdhci_host *host;
	132
	133	if (!c \|\| !c->host)
	134	return 0;
	135
	136	host = c->host;
	137
	138	/* Platform specific code during emmc proble slot goes here */
	139
	140	if (hid && uid && !strcmp(hid, "80860F14") && !strcmp(uid, "1") &&
	141	sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 &&
	142	sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807)
	143	host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */
	144
	145	return 0;
	146	}
	147
	148	static int sdhci_acpi_sdio_probe_slot(struct platform_device *pdev,
	149	const char hid, const char uid)
	150	{
	151	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	152	struct sdhci_host *host;
	153
	154	if (!c \|\| !c->host)
	155	return 0;
	156
	157	host = c->host;
	158
	159	/* Platform specific code during emmc proble slot goes here */
	160
	161	return 0;
	162	}
	163
	164	static int sdhci_acpi_sd_probe_slot(struct platform_device *pdev,
	165	const char hid, const char uid)
	166	{
	167	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	168	struct sdhci_host *host;
	169
	170	if (!c \|\| !c->host \|\| !c->slot)
	171	return 0;
	172
	173	host = c->host;
	174
	175	/* Platform specific code during emmc proble slot goes here */
	176
	177	return 0;
	178	}
	179
	180	static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
	181	.chip = &sdhci_acpi_chip_int,
	182	.caps = MMC_CAP_8_BIT_DATA \| MMC_CAP_NONREMOVABLE \|
	183	MMC_CAP_HW_RESET \| MMC_CAP_1_8V_DDR,
	184	.caps2 = MMC_CAP2_HC_ERASE_SZ,
	185	.flags = SDHCI_ACPI_RUNTIME_PM,
	186	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN \| SDHCI_QUIRK2_STOP_WITH_TC,
	187	.probe_slot = sdhci_acpi_emmc_probe_slot,
	188	};
	189
	190	static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
	191	.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
	192	.quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
	193	.caps = MMC_CAP_NONREMOVABLE \| MMC_CAP_POWER_OFF_CARD,
	194	.flags = SDHCI_ACPI_RUNTIME_PM,
	195	.pm_caps = MMC_PM_KEEP_POWER,
	196	.probe_slot = sdhci_acpi_sdio_probe_slot,
	197	};
	198
	199	static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
	200	.flags = SDHCI_ACPI_SD_CD \| SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL \|
	201	SDHCI_ACPI_RUNTIME_PM,
	202	.quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON \|
	203	SDHCI_QUIRK2_STOP_WITH_TC,
	204	.probe_slot = sdhci_acpi_sd_probe_slot,
	205	};
	206
	207	struct sdhci_acpi_uid_slot {
	208	const char *hid;
	209	const char *uid;
	210	const struct sdhci_acpi_slot *slot;
	211	};
	212
	213	static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = {
	214	{ "80860F14" , "1" , &sdhci_acpi_slot_int_emmc },
	215	{ "80860F14" , "3" , &sdhci_acpi_slot_int_sd },
	216	{ "80860F16" , NULL, &sdhci_acpi_slot_int_sd },
	217	{ "INT33BB" , "2" , &sdhci_acpi_slot_int_sdio },
	218	{ "INT33BB" , "3" , &sdhci_acpi_slot_int_sd },
	219	{ "INT33C6" , NULL, &sdhci_acpi_slot_int_sdio },
	220	{ "INT3436" , NULL, &sdhci_acpi_slot_int_sdio },
	221	{ "PNP0D40" },
	222	{ },
	223	};
	224
	225	static const struct acpi_device_id sdhci_acpi_ids[] = {
	226	{ "80860F14" },
	227	{ "80860F16" },
	228	{ "INT33BB" },
	229	{ "INT33C6" },
	230	{ "INT3436" },
	231	{ "PNP0D40" },
	232	{ },
	233	};
	234	MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
	235
	236	static const struct sdhci_acpi_slot sdhci_acpi_get_slot(const char hid,
	237	const char *uid)
	238	{
	239	const struct sdhci_acpi_uid_slot *u;
	240
	241	for (u = sdhci_acpi_uids; u->hid; u++) {
	242	if (strcmp(u->hid, hid))
	243	continue;
	244	if (!u->uid)
	245	return u->slot;
	246	if (uid && !strcmp(u->uid, uid))
	247	return u->slot;
	248	}
	249	return NULL;
	250	}
	251
	252	static int sdhci_acpi_probe(struct platform_device *pdev)
	253	{
	254	struct device *dev = &pdev->dev;
	255	acpi_handle handle = ACPI_HANDLE(dev);
	256	struct acpi_device *device;
	257	struct sdhci_acpi_host *c;
	258	struct sdhci_host *host;
	259	struct resource *iomem;
	260	resource_size_t len;
	261	const char *hid;
	262	const char *uid;
	263	int err;
	264
	265	if (acpi_bus_get_device(handle, &device))
	266	return -ENODEV;
	267
	268	if (acpi_bus_get_status(device) \|\| !device->status.present)
	269	return -ENODEV;
	270
	271	hid = acpi_device_hid(device);
	272	uid = device->pnp.unique_id;
	273
	274	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	275	if (!iomem)
	276	return -ENOMEM;
	277
	278	len = resource_size(iomem);
	279	if (len < 0x100)
	280	dev_err(dev, "Invalid iomem size!\n");
	281
	282	if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
	283	return -ENOMEM;
	284
	285	host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host));
	286	if (IS_ERR(host))
	287	return PTR_ERR(host);
	288
	289	c = sdhci_priv(host);
	290	c->host = host;
	291	c->slot = sdhci_acpi_get_slot(hid, uid);
	292	c->pdev = pdev;
	293	c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
	294
	295	platform_set_drvdata(pdev, c);
	296
	297	host->hw_name = "ACPI";
	298	host->ops = &sdhci_acpi_ops_dflt;
	299	host->irq = platform_get_irq(pdev, 0);
	300
	301	host->ioaddr = devm_ioremap_nocache(dev, iomem->start,
	302	resource_size(iomem));
	303	if (host->ioaddr == NULL) {
	304	err = -ENOMEM;
	305	goto err_free;
	306	}
	307
	308	if (!dev->dma_mask) {
	309	u64 dma_mask;
	310
	311	if (sdhci_readl(host, SDHCI_CAPABILITIES) & SDHCI_CAN_64BIT) {
	312	/* 64-bit DMA is not supported at present */
	313	dma_mask = DMA_BIT_MASK(32);
	314	} else {
	315	dma_mask = DMA_BIT_MASK(32);
	316	}
	317
	318	err = dma_coerce_mask_and_coherent(dev, dma_mask);
	319	if (err)
	320	goto err_free;
	321	}
	322
	323	if (c->slot) {
	324	if (c->slot->probe_slot) {
	325	err = c->slot->probe_slot(pdev, hid, uid);
	326	if (err)
	327	goto err_free;
	328	}
	329	if (c->slot->chip) {
	330	host->ops = c->slot->chip->ops;
	331	host->quirks \|= c->slot->chip->quirks;
	332	host->quirks2 \|= c->slot->chip->quirks2;
	333	host->mmc->caps \|= c->slot->chip->caps;
	334	host->mmc->caps2 \|= c->slot->chip->caps2;
	335	host->mmc->pm_caps \|= c->slot->chip->pm_caps;
	336	}
	337	host->quirks \|= c->slot->quirks;
	338	host->quirks2 \|= c->slot->quirks2;
	339	host->mmc->caps \|= c->slot->caps;
	340	host->mmc->caps2 \|= c->slot->caps2;
	341	host->mmc->pm_caps \|= c->slot->pm_caps;
	342	}
	343
	344	host->mmc->caps2 \|= MMC_CAP2_NO_PRESCAN_POWERUP;
	345
	346	if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
	347	bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL);
	348
	349	if (mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0, NULL)) {
	350	dev_warn(dev, "failed to setup card detect gpio\n");
	351	c->use_runtime_pm = false;
	352	}
	353	}
	354
	355	err = sdhci_add_host(host);
	356	if (err)
	357	goto err_free;
	358
	359	if (c->use_runtime_pm) {
	360	pm_runtime_set_active(dev);
	361	pm_suspend_ignore_children(dev, 1);
	362	pm_runtime_set_autosuspend_delay(dev, 50);
	363	pm_runtime_use_autosuspend(dev);
	364	pm_runtime_enable(dev);
	365	}
	366
	367	return 0;
	368
	369	err_free:
	370	sdhci_free_host(c->host);
	371	return err;
	372	}
	373
	374	static int sdhci_acpi_remove(struct platform_device *pdev)
	375	{
	376	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	377	struct device *dev = &pdev->dev;
	378	int dead;
	379
	380	if (c->use_runtime_pm) {
	381	pm_runtime_get_sync(dev);
	382	pm_runtime_disable(dev);
	383	pm_runtime_put_noidle(dev);
	384	}
	385
	386	if (c->slot && c->slot->remove_slot)
	387	c->slot->remove_slot(pdev);
	388
	389	dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0);
	390	sdhci_remove_host(c->host, dead);
	391	sdhci_free_host(c->host);
	392
	393	return 0;
	394	}
	395
	396	#ifdef CONFIG_PM_SLEEP
	397
	398	static int sdhci_acpi_suspend(struct device *dev)
	399	{
	400	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
	401
	402	return sdhci_suspend_host(c->host);
	403	}
	404
	405	static int sdhci_acpi_resume(struct device *dev)
	406	{
	407	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
	408
	409	return sdhci_resume_host(c->host);
	410	}
	411
	412	#else
	413
	414	#define sdhci_acpi_suspend NULL
	415	#define sdhci_acpi_resume NULL
	416
	417	#endif
	418
	419	#ifdef CONFIG_PM_RUNTIME
	420
	421	static int sdhci_acpi_runtime_suspend(struct device *dev)
	422	{
	423	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
	424
	425	return sdhci_runtime_suspend_host(c->host);
	426	}
	427
	428	static int sdhci_acpi_runtime_resume(struct device *dev)
	429	{
	430	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
	431
	432	return sdhci_runtime_resume_host(c->host);
	433	}
	434
	435	static int sdhci_acpi_runtime_idle(struct device *dev)
	436	{
	437	return 0;
	438	}
	439
	440	#endif
	441
	442	static const struct dev_pm_ops sdhci_acpi_pm_ops = {
	443	.suspend = sdhci_acpi_suspend,
	444	.resume = sdhci_acpi_resume,
	445	SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend,
	446	sdhci_acpi_runtime_resume, sdhci_acpi_runtime_idle)
	447	};
	448
	449	static struct platform_driver sdhci_acpi_driver = {
	450	.driver = {
	451	.name = "sdhci-acpi",
	452	.owner = THIS_MODULE,
	453	.acpi_match_table = sdhci_acpi_ids,
	454	.pm = &sdhci_acpi_pm_ops,
	455	},
	456	.probe = sdhci_acpi_probe,
	457	.remove = sdhci_acpi_remove,
	458	};
	459
	460	module_platform_driver(sdhci_acpi_driver);
	461
	462	MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
	463	MODULE_AUTHOR("Adrian Hunter");
	464	MODULE_LICENSE("GPL v2");