[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>

#ifdef CONFIG_X86
#include <asm/cpu_device_id.h>
#include <asm/intel-family.h>
#include <asm/iosf_mbi.h>
#endif

#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 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,
	.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,
	.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,
};

#ifdef CONFIG_X86

static bool sdhci_acpi_byt(void)
{
	static const struct x86_cpu_id byt[] = {
		{ X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT1 },
		{}
	};

	return x86_match_cpu(byt);
}

#define BYT_IOSF_SCCEP			0x63
#define BYT_IOSF_OCP_NETCTRL0		0x1078
#define BYT_IOSF_OCP_TIMEOUT_BASE	GENMASK(10, 8)

static void sdhci_acpi_byt_setting(struct device *dev)
{
	u32 val = 0;

	if (!sdhci_acpi_byt())
		return;

	if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0,
			  &val)) {
		dev_err(dev, "%s read error\n", __func__);
		return;
	}

	if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE))
		return;

	val &= ~BYT_IOSF_OCP_TIMEOUT_BASE;

	if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0,
			   val)) {
		dev_err(dev, "%s write error\n", __func__);
		return;
	}

	dev_dbg(dev, "%s completed\n", __func__);
}

static bool sdhci_acpi_byt_defer(struct device *dev)
{
	if (!sdhci_acpi_byt())
		return false;

	if (!iosf_mbi_available())
		return true;

	sdhci_acpi_byt_setting(dev);

	return false;
}

#else

static inline void sdhci_acpi_byt_setting(struct device *dev)
{
}

static inline bool sdhci_acpi_byt_defer(struct device *dev)
{
	return false;
}

#endif

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;

	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);

	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_CMD_DURING_TFR | 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_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_WAIT_WHILE_BUSY | MMC_CAP_AGGRESSIVE_PM,
	.probe_slot	= sdhci_acpi_sd_probe_slot,
};

static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd_3v = {
	.quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
	.quirks2 = SDHCI_QUIRK2_NO_1_8_V,
	.caps    = MMC_CAP_NONREMOVABLE,
};

static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = {
	.quirks  = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
	.caps    = MMC_CAP_NONREMOVABLE,
};

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" , "2" , &sdhci_acpi_slot_int_sdio },
	{ "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"  },
	{ "QCOM8051", NULL, &sdhci_acpi_slot_qcom_sd_3v },
	{ "QCOM8052", NULL, &sdhci_acpi_slot_qcom_sd },
	{ },
};

static const struct acpi_device_id sdhci_acpi_ids[] = {
	{ "80865ACA" },
	{ "80865ACC" },
	{ "80865AD0" },
	{ "80860F14" },
	{ "80860F16" },
	{ "INT33BB"  },
	{ "INT33C6"  },
	{ "INT3436"  },
	{ "INT344D"  },
	{ "PNP0D40"  },
	{ "QCOM8051" },
	{ "QCOM8052" },
	{ },
};
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, *child;
	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;

	/* Power on the SDHCI controller and its children */
	acpi_device_fix_up_power(device);
	list_for_each_entry(child, &device->children, node)
		if (child->status.present && child->status.enabled)
			acpi_device_fix_up_power(child);

	if (acpi_bus_get_status(device) || !device->status.present)
		return -ENODEV;

	if (sdhci_acpi_byt_defer(dev))
		return -EPROBE_DEFER;

	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);

		err = mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0, NULL);
		if (err) {
			if (err == -EPROBE_DEFER)
				goto err_free;
			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);
	}

	device_enable_async_suspend(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);
	struct sdhci_host *host = c->host;

	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
		mmc_retune_needed(host->mmc);

	return sdhci_suspend_host(host);
}

static int sdhci_acpi_resume(struct device *dev)
{
	struct sdhci_acpi_host *c = dev_get_drvdata(dev);

	sdhci_acpi_byt_setting(&c->pdev->dev);

	return sdhci_resume_host(c->host);
}

#endif

#ifdef CONFIG_PM

static int sdhci_acpi_runtime_suspend(struct device *dev)
{
	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
	struct sdhci_host *host = c->host;

	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
		mmc_retune_needed(host->mmc);

	return sdhci_runtime_suspend_host(host);
}

static int sdhci_acpi_runtime_resume(struct device *dev)
{
	struct sdhci_acpi_host *c = dev_get_drvdata(dev);

	sdhci_acpi_byt_setting(&c->pdev->dev);

	return sdhci_runtime_resume_host(c->host);
}

#endif

static const struct dev_pm_ops sdhci_acpi_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(sdhci_acpi_suspend, 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	43
6e1c7d61 AH	44	#ifdef CONFIG_X86
6e1c7d61 AH	45	#include <asm/cpu_device_id.h>
8ba4cb53	46	#include <asm/intel-family.h>
6e1c7d61 AH	47	#include <asm/iosf_mbi.h>
	48	#endif
	49
c4e05037 AH	50	#include "sdhci.h"
	51
	52	enum {
4fd4409c AH	53	SDHCI_ACPI_SD_CD = BIT(0),
	54	SDHCI_ACPI_RUNTIME_PM = BIT(1),
	55	SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL = BIT(2),
c4e05037 AH	56	};
	57
	58	struct sdhci_acpi_chip {
	59	const struct sdhci_ops *ops;
	60	unsigned int quirks;
	61	unsigned int quirks2;
	62	unsigned long caps;
	63	unsigned int caps2;
	64	mmc_pm_flag_t pm_caps;
	65	};
	66
	67	struct sdhci_acpi_slot {
	68	const struct sdhci_acpi_chip *chip;
	69	unsigned int quirks;
	70	unsigned int quirks2;
	71	unsigned long caps;
	72	unsigned int caps2;
	73	mmc_pm_flag_t pm_caps;
	74	unsigned int flags;
7dafca83	75	int (probe_slot)(struct platform_device , const char , const char );
578b36b6	76	int (remove_slot)(struct platform_device );
c4e05037 AH	77	};
	78
	79	struct sdhci_acpi_host {
	80	struct sdhci_host *host;
	81	const struct sdhci_acpi_slot *slot;
	82	struct platform_device *pdev;
	83	bool use_runtime_pm;
	84	};
	85
	86	static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
	87	{
	88	return c->slot && (c->slot->flags & flag);
	89	}
	90
b04fa064 AH	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
c4e05037	106	static const struct sdhci_ops sdhci_acpi_ops_dflt = {
1771059c	107	.set_clock = sdhci_set_clock,
2317f56c	108	.set_bus_width = sdhci_set_bus_width,
03231f9b	109	.reset = sdhci_reset,
96d7b78c	110	.set_uhs_signaling = sdhci_set_uhs_signaling,
c4e05037 AH	111	};
c4e05037 AH	112
b04fa064	113	static const struct sdhci_ops sdhci_acpi_ops_int = {
1771059c	114	.set_clock = sdhci_set_clock,
2317f56c	115	.set_bus_width = sdhci_set_bus_width,
03231f9b	116	.reset = sdhci_reset,
96d7b78c	117	.set_uhs_signaling = sdhci_set_uhs_signaling,
b04fa064 AH	118	.hw_reset = sdhci_acpi_int_hw_reset,
	119	};
	120
	121	static const struct sdhci_acpi_chip sdhci_acpi_chip_int = {
	122	.ops = &sdhci_acpi_ops_int,
	123	};
	124
6e1c7d61 AH	125	#ifdef CONFIG_X86
	126
	127	static bool sdhci_acpi_byt(void)
	128	{
	129	static const struct x86_cpu_id byt[] = {
8ba4cb53	130	{ X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_SILVERMONT1 },
6e1c7d61 AH	131	{}
	132	};
	133
	134	return x86_match_cpu(byt);
	135	}
	136
	137	#define BYT_IOSF_SCCEP 0x63
	138	#define BYT_IOSF_OCP_NETCTRL0 0x1078
	139	#define BYT_IOSF_OCP_TIMEOUT_BASE GENMASK(10, 8)
	140
	141	static void sdhci_acpi_byt_setting(struct device *dev)
	142	{
	143	u32 val = 0;
	144
	145	if (!sdhci_acpi_byt())
	146	return;
	147
	148	if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0,
	149	&val)) {
	150	dev_err(dev, "%s read error\n", __func__);
	151	return;
	152	}
	153
	154	if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE))
	155	return;
	156
	157	val &= ~BYT_IOSF_OCP_TIMEOUT_BASE;
	158
	159	if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0,
	160	val)) {
	161	dev_err(dev, "%s write error\n", __func__);
	162	return;
	163	}
	164
	165	dev_dbg(dev, "%s completed\n", __func__);
	166	}
	167
	168	static bool sdhci_acpi_byt_defer(struct device *dev)
	169	{
	170	if (!sdhci_acpi_byt())
	171	return false;
	172
	173	if (!iosf_mbi_available())
	174	return true;
	175
	176	sdhci_acpi_byt_setting(dev);
	177
	178	return false;
	179	}
	180
	181	#else
	182
	183	static inline void sdhci_acpi_byt_setting(struct device *dev)
	184	{
	185	}
	186
	187	static inline bool sdhci_acpi_byt_defer(struct device *dev)
	188	{
	189	return false;
	190	}
	191
	192	#endif
	193
6a645dd8 AH	194	static int bxt_get_cd(struct mmc_host *mmc)
	195	{
	196	int gpio_cd = mmc_gpio_get_cd(mmc);
	197	struct sdhci_host *host = mmc_priv(mmc);
	198	unsigned long flags;
	199	int ret = 0;
	200
	201	if (!gpio_cd)
	202	return 0;
	203
6a645dd8 AH	204	spin_lock_irqsave(&host->lock, flags);
	205
	206	if (host->flags & SDHCI_DEVICE_DEAD)
	207	goto out;
	208
	209	ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
	210	out:
	211	spin_unlock_irqrestore(&host->lock, flags);
	212
6a645dd8 AH	213	return ret;
	214	}
	215
7dafca83 AH	216	static int sdhci_acpi_emmc_probe_slot(struct platform_device *pdev,
7dafca83 AH	217	const char hid, const char uid)
578b36b6 GY	218	{
	219	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	220	struct sdhci_host *host;
	221
	222	if (!c \|\| !c->host)
	223	return 0;
	224
	225	host = c->host;
	226
94203042	227	/* Platform specific code during emmc probe slot goes here */
578b36b6	228
8024379e AH	229	if (hid && uid && !strcmp(hid, "80860F14") && !strcmp(uid, "1") &&
	230	sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 &&
	231	sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807)
	232	host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */
	233
578b36b6 GY	234	return 0;
	235	}
	236
7dafca83 AH	237	static int sdhci_acpi_sdio_probe_slot(struct platform_device *pdev,
7dafca83 AH	238	const char hid, const char uid)
578b36b6 GY	239	{
	240	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	241	struct sdhci_host *host;
	242
	243	if (!c \|\| !c->host)
	244	return 0;
	245
	246	host = c->host;
	247
94203042	248	/* Platform specific code during sdio probe slot goes here */
578b36b6 GY	249
	250	return 0;
	251	}
	252
7dafca83 AH	253	static int sdhci_acpi_sd_probe_slot(struct platform_device *pdev,
7dafca83 AH	254	const char hid, const char uid)
578b36b6 GY	255	{
	256	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	257	struct sdhci_host *host;
	258
	259	if (!c \|\| !c->host \|\| !c->slot)
	260	return 0;
	261
	262	host = c->host;
	263
94203042	264	/* Platform specific code during sd probe slot goes here */
578b36b6	265
d3e97407	266	if (hid && !strcmp(hid, "80865ACA"))
6a645dd8 AH	267	host->mmc_host_ops.get_cd = bxt_get_cd;
6a645dd8 AH	268
578b36b6 GY	269	return 0;
	270	}
	271
07a58883	272	static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
b04fa064	273	.chip = &sdhci_acpi_chip_int,
f25c3372	274	.caps = MMC_CAP_8_BIT_DATA \| MMC_CAP_NONREMOVABLE \|
9d65cb88	275	MMC_CAP_HW_RESET \| MMC_CAP_1_8V_DDR \|
c80f275f	276	MMC_CAP_CMD_DURING_TFR \| MMC_CAP_WAIT_WHILE_BUSY,
07a58883 AH	277	.caps2 = MMC_CAP2_HC_ERASE_SZ,
07a58883 AH	278	.flags = SDHCI_ACPI_RUNTIME_PM,
e1f5633a	279	.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
e839b134 AH	280	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN \|
	281	SDHCI_QUIRK2_STOP_WITH_TC \|
	282	SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
578b36b6	283	.probe_slot = sdhci_acpi_emmc_probe_slot,
07a58883 AH	284	};
07a58883 AH	285
e5571397	286	static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
e1f5633a AH	287	.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION \|
e1f5633a AH	288	SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
e5571397	289	.quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
9d65cb88	290	.caps = MMC_CAP_NONREMOVABLE \| MMC_CAP_POWER_OFF_CARD \|
265984b3	291	MMC_CAP_WAIT_WHILE_BUSY,
e5571397 AH	292	.flags = SDHCI_ACPI_RUNTIME_PM,
e5571397 AH	293	.pm_caps = MMC_PM_KEEP_POWER,
578b36b6	294	.probe_slot = sdhci_acpi_sdio_probe_slot,
e5571397 AH	295	};
e5571397 AH	296
07a58883	297	static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
4fd4409c AH	298	.flags = SDHCI_ACPI_SD_CD \| SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL \|
4fd4409c AH	299	SDHCI_ACPI_RUNTIME_PM,
e1f5633a	300	.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
934e31b9 AH	301	.quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON \|
934e31b9 AH	302	SDHCI_QUIRK2_STOP_WITH_TC,
d3e97407	303	.caps = MMC_CAP_WAIT_WHILE_BUSY \| MMC_CAP_AGGRESSIVE_PM,
578b36b6	304	.probe_slot = sdhci_acpi_sd_probe_slot,
07a58883 AH	305	};
07a58883 AH	306
70cce2af PE	307	static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd_3v = {
	308	.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
	309	.quirks2 = SDHCI_QUIRK2_NO_1_8_V,
	310	.caps = MMC_CAP_NONREMOVABLE,
	311	};
	312
	313	static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = {
	314	.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
	315	.caps = MMC_CAP_NONREMOVABLE,
	316	};
	317
07a58883 AH	318	struct sdhci_acpi_uid_slot {
	319	const char *hid;
	320	const char *uid;
	321	const struct sdhci_acpi_slot *slot;
	322	};
	323
	324	static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = {
e839b134 AH	325	{ "80865ACA", NULL, &sdhci_acpi_slot_int_sd },
	326	{ "80865ACC", NULL, &sdhci_acpi_slot_int_emmc },
	327	{ "80865AD0", NULL, &sdhci_acpi_slot_int_sdio },
07a58883	328	{ "80860F14" , "1" , &sdhci_acpi_slot_int_emmc },
db52d4f8	329	{ "80860F14" , "2" , &sdhci_acpi_slot_int_sdio },
07a58883	330	{ "80860F14" , "3" , &sdhci_acpi_slot_int_sd },
aad95dc4	331	{ "80860F16" , NULL, &sdhci_acpi_slot_int_sd },
07a58883	332	{ "INT33BB" , "2" , &sdhci_acpi_slot_int_sdio },
7147eaf3	333	{ "INT33BB" , "3" , &sdhci_acpi_slot_int_sd },
07a58883	334	{ "INT33C6" , NULL, &sdhci_acpi_slot_int_sdio },
07c001c1	335	{ "INT3436" , NULL, &sdhci_acpi_slot_int_sdio },
d0ed8e6b	336	{ "INT344D" , NULL, &sdhci_acpi_slot_int_sdio },
0cd2f044	337	{ "PNP0FFF" , "3" , &sdhci_acpi_slot_int_sd },
07a58883	338	{ "PNP0D40" },
70cce2af PE	339	{ "QCOM8051", NULL, &sdhci_acpi_slot_qcom_sd_3v },
70cce2af PE	340	{ "QCOM8052", NULL, &sdhci_acpi_slot_qcom_sd },
07a58883 AH	341	{ },
	342	};
	343
c4e05037	344	static const struct acpi_device_id sdhci_acpi_ids[] = {
e839b134 AH	345	{ "80865ACA" },
	346	{ "80865ACC" },
	347	{ "80865AD0" },
07a58883	348	{ "80860F14" },
aad95dc4	349	{ "80860F16" },
07a58883 AH	350	{ "INT33BB" },
07a58883 AH	351	{ "INT33C6" },
07c001c1	352	{ "INT3436" },
d0ed8e6b	353	{ "INT344D" },
07a58883	354	{ "PNP0D40" },
70cce2af PE	355	{ "QCOM8051" },
70cce2af PE	356	{ "QCOM8052" },
c4e05037 AH	357	{ },
	358	};
	359	MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
	360
3db35251 AH	361	static const struct sdhci_acpi_slot sdhci_acpi_get_slot(const char hid,
3db35251 AH	362	const char *uid)
c4e05037	363	{
07a58883 AH	364	const struct sdhci_acpi_uid_slot *u;
	365
	366	for (u = sdhci_acpi_uids; u->hid; u++) {
	367	if (strcmp(u->hid, hid))
	368	continue;
	369	if (!u->uid)
	370	return u->slot;
	371	if (uid && !strcmp(u->uid, uid))
	372	return u->slot;
	373	}
c4e05037 AH	374	return NULL;
	375	}
	376
4e608e4e	377	static int sdhci_acpi_probe(struct platform_device *pdev)
c4e05037 AH	378	{
	379	struct device *dev = &pdev->dev;
	380	acpi_handle handle = ACPI_HANDLE(dev);
e5bbf307	381	struct acpi_device device, child;
c4e05037 AH	382	struct sdhci_acpi_host *c;
	383	struct sdhci_host *host;
	384	struct resource *iomem;
	385	resource_size_t len;
	386	const char *hid;
3db35251	387	const char *uid;
87875655	388	int err;
c4e05037 AH	389
	390	if (acpi_bus_get_device(handle, &device))
	391	return -ENODEV;
	392
e5bbf307 AH	393	/* Power on the SDHCI controller and its children */
	394	acpi_device_fix_up_power(device);
	395	list_for_each_entry(child, &device->children, node)
e1d070c3 HG	396	if (child->status.present && child->status.enabled)
e1d070c3 HG	397	acpi_device_fix_up_power(child);
e5bbf307	398
c4e05037 AH	399	if (acpi_bus_get_status(device) \|\| !device->status.present)
	400	return -ENODEV;
	401
6e1c7d61 AH	402	if (sdhci_acpi_byt_defer(dev))
	403	return -EPROBE_DEFER;
	404
c4e05037	405	hid = acpi_device_hid(device);
3db35251	406	uid = device->pnp.unique_id;
c4e05037 AH	407
	408	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	409	if (!iomem)
	410	return -ENOMEM;
	411
	412	len = resource_size(iomem);
	413	if (len < 0x100)
	414	dev_err(dev, "Invalid iomem size!\n");
	415
	416	if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
	417	return -ENOMEM;
	418
	419	host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host));
	420	if (IS_ERR(host))
	421	return PTR_ERR(host);
	422
	423	c = sdhci_priv(host);
	424	c->host = host;
3db35251	425	c->slot = sdhci_acpi_get_slot(hid, uid);
c4e05037 AH	426	c->pdev = pdev;
	427	c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
	428
	429	platform_set_drvdata(pdev, c);
	430
	431	host->hw_name = "ACPI";
	432	host->ops = &sdhci_acpi_ops_dflt;
	433	host->irq = platform_get_irq(pdev, 0);
	434
	435	host->ioaddr = devm_ioremap_nocache(dev, iomem->start,
	436	resource_size(iomem));
	437	if (host->ioaddr == NULL) {
	438	err = -ENOMEM;
	439	goto err_free;
	440	}
	441
c4e05037	442	if (c->slot) {
578b36b6	443	if (c->slot->probe_slot) {
7dafca83	444	err = c->slot->probe_slot(pdev, hid, uid);
578b36b6 GY	445	if (err)
	446	goto err_free;
	447	}
c4e05037 AH	448	if (c->slot->chip) {
	449	host->ops = c->slot->chip->ops;
	450	host->quirks \|= c->slot->chip->quirks;
	451	host->quirks2 \|= c->slot->chip->quirks2;
	452	host->mmc->caps \|= c->slot->chip->caps;
	453	host->mmc->caps2 \|= c->slot->chip->caps2;
	454	host->mmc->pm_caps \|= c->slot->chip->pm_caps;
	455	}
	456	host->quirks \|= c->slot->quirks;
	457	host->quirks2 \|= c->slot->quirks2;
	458	host->mmc->caps \|= c->slot->caps;
	459	host->mmc->caps2 \|= c->slot->caps2;
	460	host->mmc->pm_caps \|= c->slot->pm_caps;
	461	}
	462
0d3e3350 AH	463	host->mmc->caps2 \|= MMC_CAP2_NO_PRESCAN_POWERUP;
0d3e3350 AH	464
a61abe6e	465	if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
4fd4409c AH	466	bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL);
4fd4409c AH	467
e28d6f04 ZR	468	err = mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0, NULL);
	469	if (err) {
	470	if (err == -EPROBE_DEFER)
	471	goto err_free;
4fd4409c	472	dev_warn(dev, "failed to setup card detect gpio\n");
a61abe6e	473	c->use_runtime_pm = false;
4fd4409c	474	}
a61abe6e AH	475	}
a61abe6e AH	476
4fd4409c AH	477	err = sdhci_add_host(host);
	478	if (err)
	479	goto err_free;
	480
c4e05037	481	if (c->use_runtime_pm) {
1d1ff458	482	pm_runtime_set_active(dev);
c4e05037 AH	483	pm_suspend_ignore_children(dev, 1);
	484	pm_runtime_set_autosuspend_delay(dev, 50);
	485	pm_runtime_use_autosuspend(dev);
	486	pm_runtime_enable(dev);
	487	}
	488
4e6a2ef9 FZ	489	device_enable_async_suspend(dev);
4e6a2ef9 FZ	490
c4e05037 AH	491	return 0;
	492
	493	err_free:
c4e05037 AH	494	sdhci_free_host(c->host);
	495	return err;
	496	}
	497
4e608e4e	498	static int sdhci_acpi_remove(struct platform_device *pdev)
c4e05037 AH	499	{
	500	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	501	struct device *dev = &pdev->dev;
	502	int dead;
	503
	504	if (c->use_runtime_pm) {
	505	pm_runtime_get_sync(dev);
	506	pm_runtime_disable(dev);
	507	pm_runtime_put_noidle(dev);
	508	}
	509
578b36b6 GY	510	if (c->slot && c->slot->remove_slot)
	511	c->slot->remove_slot(pdev);
	512
c4e05037 AH	513	dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0);
c4e05037 AH	514	sdhci_remove_host(c->host, dead);
c4e05037 AH	515	sdhci_free_host(c->host);
	516
	517	return 0;
	518	}
	519
	520	#ifdef CONFIG_PM_SLEEP
	521
	522	static int sdhci_acpi_suspend(struct device *dev)
	523	{
	524	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
d38dcad4	525	struct sdhci_host *host = c->host;
c4e05037	526
d38dcad4 AH	527	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
	528	mmc_retune_needed(host->mmc);
	529
	530	return sdhci_suspend_host(host);
c4e05037 AH	531	}
	532
	533	static int sdhci_acpi_resume(struct device *dev)
	534	{
	535	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
	536
6e1c7d61 AH	537	sdhci_acpi_byt_setting(&c->pdev->dev);
6e1c7d61 AH	538
c4e05037 AH	539	return sdhci_resume_host(c->host);
	540	}
	541
c4e05037 AH	542	#endif
c4e05037 AH	543
162d6f98	544	#ifdef CONFIG_PM
c4e05037 AH	545
	546	static int sdhci_acpi_runtime_suspend(struct device *dev)
	547	{
	548	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
d38dcad4 AH	549	struct sdhci_host *host = c->host;
	550
	551	if (host->tuning_mode != SDHCI_TUNING_MODE_3)
	552	mmc_retune_needed(host->mmc);
c4e05037	553
d38dcad4	554	return sdhci_runtime_suspend_host(host);
c4e05037 AH	555	}
	556
	557	static int sdhci_acpi_runtime_resume(struct device *dev)
	558	{
	559	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
	560
6e1c7d61 AH	561	sdhci_acpi_byt_setting(&c->pdev->dev);
6e1c7d61 AH	562
c4e05037 AH	563	return sdhci_runtime_resume_host(c->host);
	564	}
	565
c4e05037 AH	566	#endif
	567
	568	static const struct dev_pm_ops sdhci_acpi_pm_ops = {
dafed447	569	SET_SYSTEM_SLEEP_PM_OPS(sdhci_acpi_suspend, sdhci_acpi_resume)
1d75f74b	570	SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend,
9b449e99	571	sdhci_acpi_runtime_resume, NULL)
c4e05037 AH	572	};
	573
	574	static struct platform_driver sdhci_acpi_driver = {
	575	.driver = {
	576	.name = "sdhci-acpi",
c4e05037 AH	577	.acpi_match_table = sdhci_acpi_ids,
	578	.pm = &sdhci_acpi_pm_ops,
	579	},
	580	.probe = sdhci_acpi_probe,
4e608e4e	581	.remove = sdhci_acpi_remove,
c4e05037 AH	582	};
	583
	584	module_platform_driver(sdhci_acpi_driver);
	585
	586	MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
	587	MODULE_AUTHOR("Adrian Hunter");
	588	MODULE_LICENSE("GPL v2");