[linux-2.6-block.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 "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;
	bool				dma_setup;
};

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)
{
	struct sdhci_acpi_host *c = sdhci_priv(host);
	struct device *dev = &c->pdev->dev;
	int err = -1;

	if (c->dma_setup)
		return 0;

	if (host->flags & SDHCI_USE_64_BIT_DMA) {
		if (host->quirks2 & SDHCI_QUIRK2_BROKEN_64_BIT_DMA) {
			host->flags &= ~SDHCI_USE_64_BIT_DMA;
		} else {
			err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
			if (err)
				dev_warn(dev, "Failed to set 64-bit DMA mask\n");
		}
	}

	if (err)
		err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));

	c->dma_setup = !err;

	return err;
}

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 bxt_get_cd(struct mmc_host *mmc)
{
	int gpio_cd = mmc_gpio_get_cd(mmc);
	struct sdhci_host *host = mmc_priv(mmc);
	unsigned long flags;
	int ret = 0;

	if (!gpio_cd)
		return 0;

	pm_runtime_get_sync(mmc->parent);

	spin_lock_irqsave(&host->lock, flags);

	if (host->flags & SDHCI_DEVICE_DEAD)
		goto out;

	ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
out:
	spin_unlock_irqrestore(&host->lock, flags);

	pm_runtime_mark_last_busy(mmc->parent);
	pm_runtime_put_autosuspend(mmc->parent);

	return ret;
}

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 probe 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 sdio probe 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 sd probe slot goes here */

	if (hid && !strcmp(hid, "80865ACA"))
		host->mmc_host_ops.get_cd = bxt_get_cd;

	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 |
		   MMC_CAP_BUS_WIDTH_TEST | MMC_CAP_WAIT_WHILE_BUSY,
	.caps2   = MMC_CAP2_HC_ERASE_SZ,
	.flags   = SDHCI_ACPI_RUNTIME_PM,
	.quirks  = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
		   SDHCI_QUIRK2_STOP_WITH_TC |
		   SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
	.probe_slot	= sdhci_acpi_emmc_probe_slot,
};

static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
	.quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
		   SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
	.quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
	.caps    = MMC_CAP_NONREMOVABLE | MMC_CAP_POWER_OFF_CARD |
		   MMC_CAP_BUS_WIDTH_TEST | MMC_CAP_WAIT_WHILE_BUSY,
	.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,
	.quirks  = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
	.quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |
		   SDHCI_QUIRK2_STOP_WITH_TC,
	.caps    = MMC_CAP_BUS_WIDTH_TEST | MMC_CAP_WAIT_WHILE_BUSY,
	.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[] = {
	{ "80865ACA", NULL, &sdhci_acpi_slot_int_sd },
	{ "80865ACC", NULL, &sdhci_acpi_slot_int_emmc },
	{ "80865AD0", NULL, &sdhci_acpi_slot_int_sdio },
	{ "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 },
	{ "INT344D"  , NULL, &sdhci_acpi_slot_int_sdio },
	{ "PNP0FFF"  , "3" , &sdhci_acpi_slot_int_sd   },
	{ "PNP0D40"  },
	{ },
};

static const struct acpi_device_id sdhci_acpi_ids[] = {
	{ "80865ACA" },
	{ "80865ACC" },
	{ "80865AD0" },
	{ "80860F14" },
	{ "80860F16" },
	{ "INT33BB"  },
	{ "INT33C6"  },
	{ "INT3436"  },
	{ "INT344D"  },
	{ "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 (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

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);
}

#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, NULL)
};

static struct platform_driver sdhci_acpi_driver = {
	.driver = {
		.name			= "sdhci-acpi",
		.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
	44	#include "sdhci.h"
	45
	46	enum {
4fd4409c AH	47	SDHCI_ACPI_SD_CD = BIT(0),
	48	SDHCI_ACPI_RUNTIME_PM = BIT(1),
	49	SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL = BIT(2),
c4e05037 AH	50	};
	51
	52	struct sdhci_acpi_chip {
	53	const struct sdhci_ops *ops;
	54	unsigned int quirks;
	55	unsigned int quirks2;
	56	unsigned long caps;
	57	unsigned int caps2;
	58	mmc_pm_flag_t pm_caps;
	59	};
	60
	61	struct sdhci_acpi_slot {
	62	const struct sdhci_acpi_chip *chip;
	63	unsigned int quirks;
	64	unsigned int quirks2;
	65	unsigned long caps;
	66	unsigned int caps2;
	67	mmc_pm_flag_t pm_caps;
	68	unsigned int flags;
7dafca83	69	int (probe_slot)(struct platform_device , const char , const char );
578b36b6	70	int (remove_slot)(struct platform_device );
c4e05037 AH	71	};
	72
	73	struct sdhci_acpi_host {
	74	struct sdhci_host *host;
	75	const struct sdhci_acpi_slot *slot;
	76	struct platform_device *pdev;
	77	bool use_runtime_pm;
4f64f843	78	bool dma_setup;
c4e05037 AH	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	{
4f64f843 AH	88	struct sdhci_acpi_host *c = sdhci_priv(host);
	89	struct device *dev = &c->pdev->dev;
	90	int err = -1;
	91
	92	if (c->dma_setup)
	93	return 0;
	94
	95	if (host->flags & SDHCI_USE_64_BIT_DMA) {
	96	if (host->quirks2 & SDHCI_QUIRK2_BROKEN_64_BIT_DMA) {
	97	host->flags &= ~SDHCI_USE_64_BIT_DMA;
	98	} else {
	99	err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
	100	if (err)
	101	dev_warn(dev, "Failed to set 64-bit DMA mask\n");
	102	}
	103	}
	104
	105	if (err)
	106	err = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
	107
	108	c->dma_setup = !err;
	109
	110	return err;
c4e05037 AH	111	}
c4e05037 AH	112
b04fa064 AH	113	static void sdhci_acpi_int_hw_reset(struct sdhci_host *host)
	114	{
	115	u8 reg;
	116
	117	reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
	118	reg \|= 0x10;
	119	sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
	120	/* For eMMC, minimum is 1us but give it 9us for good measure */
	121	udelay(9);
	122	reg &= ~0x10;
	123	sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
	124	/* For eMMC, minimum is 200us but give it 300us for good measure */
	125	usleep_range(300, 1000);
	126	}
	127
c4e05037	128	static const struct sdhci_ops sdhci_acpi_ops_dflt = {
1771059c	129	.set_clock = sdhci_set_clock,
c4e05037	130	.enable_dma = sdhci_acpi_enable_dma,
2317f56c	131	.set_bus_width = sdhci_set_bus_width,
03231f9b	132	.reset = sdhci_reset,
96d7b78c	133	.set_uhs_signaling = sdhci_set_uhs_signaling,
c4e05037 AH	134	};
c4e05037 AH	135
b04fa064	136	static const struct sdhci_ops sdhci_acpi_ops_int = {
1771059c	137	.set_clock = sdhci_set_clock,
b04fa064	138	.enable_dma = sdhci_acpi_enable_dma,
2317f56c	139	.set_bus_width = sdhci_set_bus_width,
03231f9b	140	.reset = sdhci_reset,
96d7b78c	141	.set_uhs_signaling = sdhci_set_uhs_signaling,
b04fa064 AH	142	.hw_reset = sdhci_acpi_int_hw_reset,
	143	};
	144
	145	static const struct sdhci_acpi_chip sdhci_acpi_chip_int = {
	146	.ops = &sdhci_acpi_ops_int,
	147	};
	148
6a645dd8 AH	149	static int bxt_get_cd(struct mmc_host *mmc)
	150	{
	151	int gpio_cd = mmc_gpio_get_cd(mmc);
	152	struct sdhci_host *host = mmc_priv(mmc);
	153	unsigned long flags;
	154	int ret = 0;
	155
	156	if (!gpio_cd)
	157	return 0;
	158
	159	pm_runtime_get_sync(mmc->parent);
	160
	161	spin_lock_irqsave(&host->lock, flags);
	162
	163	if (host->flags & SDHCI_DEVICE_DEAD)
	164	goto out;
	165
	166	ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
	167	out:
	168	spin_unlock_irqrestore(&host->lock, flags);
	169
	170	pm_runtime_mark_last_busy(mmc->parent);
	171	pm_runtime_put_autosuspend(mmc->parent);
	172
	173	return ret;
	174	}
	175
7dafca83 AH	176	static int sdhci_acpi_emmc_probe_slot(struct platform_device *pdev,
7dafca83 AH	177	const char hid, const char uid)
578b36b6 GY	178	{
	179	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	180	struct sdhci_host *host;
	181
	182	if (!c \|\| !c->host)
	183	return 0;
	184
	185	host = c->host;
	186
94203042	187	/* Platform specific code during emmc probe slot goes here */
578b36b6	188
8024379e AH	189	if (hid && uid && !strcmp(hid, "80860F14") && !strcmp(uid, "1") &&
	190	sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 &&
	191	sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807)
	192	host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */
	193
578b36b6 GY	194	return 0;
	195	}
	196
7dafca83 AH	197	static int sdhci_acpi_sdio_probe_slot(struct platform_device *pdev,
7dafca83 AH	198	const char hid, const char uid)
578b36b6 GY	199	{
	200	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	201	struct sdhci_host *host;
	202
	203	if (!c \|\| !c->host)
	204	return 0;
	205
	206	host = c->host;
	207
94203042	208	/* Platform specific code during sdio probe slot goes here */
578b36b6 GY	209
	210	return 0;
	211	}
	212
7dafca83 AH	213	static int sdhci_acpi_sd_probe_slot(struct platform_device *pdev,
7dafca83 AH	214	const char hid, const char uid)
578b36b6 GY	215	{
	216	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	217	struct sdhci_host *host;
	218
	219	if (!c \|\| !c->host \|\| !c->slot)
	220	return 0;
	221
	222	host = c->host;
	223
94203042	224	/* Platform specific code during sd probe slot goes here */
578b36b6	225
6a645dd8 AH	226	if (hid && !strcmp(hid, "80865ACA"))
	227	host->mmc_host_ops.get_cd = bxt_get_cd;
	228
578b36b6 GY	229	return 0;
	230	}
	231
07a58883	232	static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
b04fa064	233	.chip = &sdhci_acpi_chip_int,
f25c3372	234	.caps = MMC_CAP_8_BIT_DATA \| MMC_CAP_NONREMOVABLE \|
9d65cb88 AH	235	MMC_CAP_HW_RESET \| MMC_CAP_1_8V_DDR \|
9d65cb88 AH	236	MMC_CAP_BUS_WIDTH_TEST \| MMC_CAP_WAIT_WHILE_BUSY,
07a58883 AH	237	.caps2 = MMC_CAP2_HC_ERASE_SZ,
07a58883 AH	238	.flags = SDHCI_ACPI_RUNTIME_PM,
e1f5633a	239	.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
e839b134 AH	240	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN \|
	241	SDHCI_QUIRK2_STOP_WITH_TC \|
	242	SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
578b36b6	243	.probe_slot = sdhci_acpi_emmc_probe_slot,
07a58883 AH	244	};
07a58883 AH	245
e5571397	246	static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
e1f5633a AH	247	.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION \|
e1f5633a AH	248	SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
e5571397	249	.quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
9d65cb88 AH	250	.caps = MMC_CAP_NONREMOVABLE \| MMC_CAP_POWER_OFF_CARD \|
9d65cb88 AH	251	MMC_CAP_BUS_WIDTH_TEST \| MMC_CAP_WAIT_WHILE_BUSY,
e5571397 AH	252	.flags = SDHCI_ACPI_RUNTIME_PM,
e5571397 AH	253	.pm_caps = MMC_PM_KEEP_POWER,
578b36b6	254	.probe_slot = sdhci_acpi_sdio_probe_slot,
e5571397 AH	255	};
e5571397 AH	256
07a58883	257	static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
4fd4409c AH	258	.flags = SDHCI_ACPI_SD_CD \| SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL \|
4fd4409c AH	259	SDHCI_ACPI_RUNTIME_PM,
e1f5633a	260	.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
934e31b9 AH	261	.quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON \|
934e31b9 AH	262	SDHCI_QUIRK2_STOP_WITH_TC,
9d65cb88	263	.caps = MMC_CAP_BUS_WIDTH_TEST \| MMC_CAP_WAIT_WHILE_BUSY,
578b36b6	264	.probe_slot = sdhci_acpi_sd_probe_slot,
07a58883 AH	265	};
	266
	267	struct sdhci_acpi_uid_slot {
	268	const char *hid;
	269	const char *uid;
	270	const struct sdhci_acpi_slot *slot;
	271	};
	272
	273	static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = {
e839b134 AH	274	{ "80865ACA", NULL, &sdhci_acpi_slot_int_sd },
	275	{ "80865ACC", NULL, &sdhci_acpi_slot_int_emmc },
	276	{ "80865AD0", NULL, &sdhci_acpi_slot_int_sdio },
07a58883 AH	277	{ "80860F14" , "1" , &sdhci_acpi_slot_int_emmc },
07a58883 AH	278	{ "80860F14" , "3" , &sdhci_acpi_slot_int_sd },
aad95dc4	279	{ "80860F16" , NULL, &sdhci_acpi_slot_int_sd },
07a58883	280	{ "INT33BB" , "2" , &sdhci_acpi_slot_int_sdio },
7147eaf3	281	{ "INT33BB" , "3" , &sdhci_acpi_slot_int_sd },
07a58883	282	{ "INT33C6" , NULL, &sdhci_acpi_slot_int_sdio },
07c001c1	283	{ "INT3436" , NULL, &sdhci_acpi_slot_int_sdio },
d0ed8e6b	284	{ "INT344D" , NULL, &sdhci_acpi_slot_int_sdio },
0cd2f044	285	{ "PNP0FFF" , "3" , &sdhci_acpi_slot_int_sd },
07a58883 AH	286	{ "PNP0D40" },
	287	{ },
	288	};
	289
c4e05037	290	static const struct acpi_device_id sdhci_acpi_ids[] = {
e839b134 AH	291	{ "80865ACA" },
	292	{ "80865ACC" },
	293	{ "80865AD0" },
07a58883	294	{ "80860F14" },
aad95dc4	295	{ "80860F16" },
07a58883 AH	296	{ "INT33BB" },
07a58883 AH	297	{ "INT33C6" },
07c001c1	298	{ "INT3436" },
d0ed8e6b	299	{ "INT344D" },
07a58883	300	{ "PNP0D40" },
c4e05037 AH	301	{ },
	302	};
	303	MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
	304
3db35251 AH	305	static const struct sdhci_acpi_slot sdhci_acpi_get_slot(const char hid,
3db35251 AH	306	const char *uid)
c4e05037	307	{
07a58883 AH	308	const struct sdhci_acpi_uid_slot *u;
	309
	310	for (u = sdhci_acpi_uids; u->hid; u++) {
	311	if (strcmp(u->hid, hid))
	312	continue;
	313	if (!u->uid)
	314	return u->slot;
	315	if (uid && !strcmp(u->uid, uid))
	316	return u->slot;
	317	}
c4e05037 AH	318	return NULL;
	319	}
	320
4e608e4e	321	static int sdhci_acpi_probe(struct platform_device *pdev)
c4e05037 AH	322	{
	323	struct device *dev = &pdev->dev;
	324	acpi_handle handle = ACPI_HANDLE(dev);
	325	struct acpi_device *device;
	326	struct sdhci_acpi_host *c;
	327	struct sdhci_host *host;
	328	struct resource *iomem;
	329	resource_size_t len;
	330	const char *hid;
3db35251	331	const char *uid;
87875655	332	int err;
c4e05037 AH	333
	334	if (acpi_bus_get_device(handle, &device))
	335	return -ENODEV;
	336
	337	if (acpi_bus_get_status(device) \|\| !device->status.present)
	338	return -ENODEV;
	339
	340	hid = acpi_device_hid(device);
3db35251	341	uid = device->pnp.unique_id;
c4e05037 AH	342
	343	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	344	if (!iomem)
	345	return -ENOMEM;
	346
	347	len = resource_size(iomem);
	348	if (len < 0x100)
	349	dev_err(dev, "Invalid iomem size!\n");
	350
	351	if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
	352	return -ENOMEM;
	353
	354	host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host));
	355	if (IS_ERR(host))
	356	return PTR_ERR(host);
	357
	358	c = sdhci_priv(host);
	359	c->host = host;
3db35251	360	c->slot = sdhci_acpi_get_slot(hid, uid);
c4e05037 AH	361	c->pdev = pdev;
	362	c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
	363
	364	platform_set_drvdata(pdev, c);
	365
	366	host->hw_name = "ACPI";
	367	host->ops = &sdhci_acpi_ops_dflt;
	368	host->irq = platform_get_irq(pdev, 0);
	369
	370	host->ioaddr = devm_ioremap_nocache(dev, iomem->start,
	371	resource_size(iomem));
	372	if (host->ioaddr == NULL) {
	373	err = -ENOMEM;
	374	goto err_free;
	375	}
	376
c4e05037	377	if (c->slot) {
578b36b6	378	if (c->slot->probe_slot) {
7dafca83	379	err = c->slot->probe_slot(pdev, hid, uid);
578b36b6 GY	380	if (err)
	381	goto err_free;
	382	}
c4e05037 AH	383	if (c->slot->chip) {
	384	host->ops = c->slot->chip->ops;
	385	host->quirks \|= c->slot->chip->quirks;
	386	host->quirks2 \|= c->slot->chip->quirks2;
	387	host->mmc->caps \|= c->slot->chip->caps;
	388	host->mmc->caps2 \|= c->slot->chip->caps2;
	389	host->mmc->pm_caps \|= c->slot->chip->pm_caps;
	390	}
	391	host->quirks \|= c->slot->quirks;
	392	host->quirks2 \|= c->slot->quirks2;
	393	host->mmc->caps \|= c->slot->caps;
	394	host->mmc->caps2 \|= c->slot->caps2;
	395	host->mmc->pm_caps \|= c->slot->pm_caps;
	396	}
	397
0d3e3350 AH	398	host->mmc->caps2 \|= MMC_CAP2_NO_PRESCAN_POWERUP;
0d3e3350 AH	399
a61abe6e	400	if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
4fd4409c AH	401	bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL);
4fd4409c AH	402
89168b48	403	if (mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0, NULL)) {
4fd4409c	404	dev_warn(dev, "failed to setup card detect gpio\n");
a61abe6e	405	c->use_runtime_pm = false;
4fd4409c	406	}
a61abe6e AH	407	}
a61abe6e AH	408
4fd4409c AH	409	err = sdhci_add_host(host);
	410	if (err)
	411	goto err_free;
	412
c4e05037	413	if (c->use_runtime_pm) {
1d1ff458	414	pm_runtime_set_active(dev);
c4e05037 AH	415	pm_suspend_ignore_children(dev, 1);
	416	pm_runtime_set_autosuspend_delay(dev, 50);
	417	pm_runtime_use_autosuspend(dev);
	418	pm_runtime_enable(dev);
	419	}
	420
	421	return 0;
	422
	423	err_free:
c4e05037 AH	424	sdhci_free_host(c->host);
	425	return err;
	426	}
	427
4e608e4e	428	static int sdhci_acpi_remove(struct platform_device *pdev)
c4e05037 AH	429	{
	430	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	431	struct device *dev = &pdev->dev;
	432	int dead;
	433
	434	if (c->use_runtime_pm) {
	435	pm_runtime_get_sync(dev);
	436	pm_runtime_disable(dev);
	437	pm_runtime_put_noidle(dev);
	438	}
	439
578b36b6 GY	440	if (c->slot && c->slot->remove_slot)
	441	c->slot->remove_slot(pdev);
	442
c4e05037 AH	443	dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0);
c4e05037 AH	444	sdhci_remove_host(c->host, dead);
c4e05037 AH	445	sdhci_free_host(c->host);
	446
	447	return 0;
	448	}
	449
	450	#ifdef CONFIG_PM_SLEEP
	451
	452	static int sdhci_acpi_suspend(struct device *dev)
	453	{
	454	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
	455
	456	return sdhci_suspend_host(c->host);
	457	}
	458
	459	static int sdhci_acpi_resume(struct device *dev)
	460	{
	461	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
	462
	463	return sdhci_resume_host(c->host);
	464	}
	465
	466	#else
	467
	468	#define sdhci_acpi_suspend NULL
	469	#define sdhci_acpi_resume NULL
	470
	471	#endif
	472
162d6f98	473	#ifdef CONFIG_PM
c4e05037 AH	474
	475	static int sdhci_acpi_runtime_suspend(struct device *dev)
	476	{
	477	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
	478
	479	return sdhci_runtime_suspend_host(c->host);
	480	}
	481
	482	static int sdhci_acpi_runtime_resume(struct device *dev)
	483	{
	484	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
	485
	486	return sdhci_runtime_resume_host(c->host);
	487	}
	488
c4e05037 AH	489	#endif
	490
	491	static const struct dev_pm_ops sdhci_acpi_pm_ops = {
	492	.suspend = sdhci_acpi_suspend,
	493	.resume = sdhci_acpi_resume,
1d75f74b	494	SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend,
9b449e99	495	sdhci_acpi_runtime_resume, NULL)
c4e05037 AH	496	};
	497
	498	static struct platform_driver sdhci_acpi_driver = {
	499	.driver = {
	500	.name = "sdhci-acpi",
c4e05037 AH	501	.acpi_match_table = sdhci_acpi_ids,
	502	.pm = &sdhci_acpi_pm_ops,
	503	},
	504	.probe = sdhci_acpi_probe,
4e608e4e	505	.remove = sdhci_acpi_remove,
c4e05037 AH	506	};
	507
	508	module_platform_driver(sdhci_acpi_driver);
	509
	510	MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
	511	MODULE_AUTHOR("Adrian Hunter");
	512	MODULE_LICENSE("GPL v2");