[deliverable/linux.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/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, 0x37 },
		{}
	};

	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_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,
};

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" , "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;
	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;

	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);

		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);
	}

	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);

	return sdhci_suspend_host(c->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);
}

#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);

	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 = {
	.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	43
6e1c7d61 AH	44	#ifdef CONFIG_X86
	45	#include <asm/cpu_device_id.h>
	46	#include <asm/iosf_mbi.h>
	47	#endif
	48
c4e05037 AH	49	#include "sdhci.h"
	50
	51	enum {
4fd4409c AH	52	SDHCI_ACPI_SD_CD = BIT(0),
	53	SDHCI_ACPI_RUNTIME_PM = BIT(1),
	54	SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL = BIT(2),
c4e05037 AH	55	};
	56
	57	struct sdhci_acpi_chip {
	58	const struct sdhci_ops *ops;
	59	unsigned int quirks;
	60	unsigned int quirks2;
	61	unsigned long caps;
	62	unsigned int caps2;
	63	mmc_pm_flag_t pm_caps;
	64	};
	65
	66	struct sdhci_acpi_slot {
	67	const struct sdhci_acpi_chip *chip;
	68	unsigned int quirks;
	69	unsigned int quirks2;
	70	unsigned long caps;
	71	unsigned int caps2;
	72	mmc_pm_flag_t pm_caps;
	73	unsigned int flags;
7dafca83	74	int (probe_slot)(struct platform_device , const char , const char );
578b36b6	75	int (remove_slot)(struct platform_device );
c4e05037 AH	76	};
	77
	78	struct sdhci_acpi_host {
	79	struct sdhci_host *host;
	80	const struct sdhci_acpi_slot *slot;
	81	struct platform_device *pdev;
	82	bool use_runtime_pm;
	83	};
	84
	85	static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag)
	86	{
	87	return c->slot && (c->slot->flags & flag);
	88	}
	89
b04fa064 AH	90	static void sdhci_acpi_int_hw_reset(struct sdhci_host *host)
	91	{
	92	u8 reg;
	93
	94	reg = sdhci_readb(host, SDHCI_POWER_CONTROL);
	95	reg \|= 0x10;
	96	sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
	97	/* For eMMC, minimum is 1us but give it 9us for good measure */
	98	udelay(9);
	99	reg &= ~0x10;
	100	sdhci_writeb(host, reg, SDHCI_POWER_CONTROL);
	101	/* For eMMC, minimum is 200us but give it 300us for good measure */
	102	usleep_range(300, 1000);
	103	}
	104
c4e05037	105	static const struct sdhci_ops sdhci_acpi_ops_dflt = {
1771059c	106	.set_clock = sdhci_set_clock,
2317f56c	107	.set_bus_width = sdhci_set_bus_width,
03231f9b	108	.reset = sdhci_reset,
96d7b78c	109	.set_uhs_signaling = sdhci_set_uhs_signaling,
c4e05037 AH	110	};
c4e05037 AH	111
b04fa064	112	static const struct sdhci_ops sdhci_acpi_ops_int = {
1771059c	113	.set_clock = sdhci_set_clock,
2317f56c	114	.set_bus_width = sdhci_set_bus_width,
03231f9b	115	.reset = sdhci_reset,
96d7b78c	116	.set_uhs_signaling = sdhci_set_uhs_signaling,
b04fa064 AH	117	.hw_reset = sdhci_acpi_int_hw_reset,
	118	};
	119
	120	static const struct sdhci_acpi_chip sdhci_acpi_chip_int = {
	121	.ops = &sdhci_acpi_ops_int,
	122	};
	123
6e1c7d61 AH	124	#ifdef CONFIG_X86
	125
	126	static bool sdhci_acpi_byt(void)
	127	{
	128	static const struct x86_cpu_id byt[] = {
	129	{ X86_VENDOR_INTEL, 6, 0x37 },
	130	{}
	131	};
	132
	133	return x86_match_cpu(byt);
	134	}
	135
	136	#define BYT_IOSF_SCCEP 0x63
	137	#define BYT_IOSF_OCP_NETCTRL0 0x1078
	138	#define BYT_IOSF_OCP_TIMEOUT_BASE GENMASK(10, 8)
	139
	140	static void sdhci_acpi_byt_setting(struct device *dev)
	141	{
	142	u32 val = 0;
	143
	144	if (!sdhci_acpi_byt())
	145	return;
	146
	147	if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0,
	148	&val)) {
	149	dev_err(dev, "%s read error\n", __func__);
	150	return;
	151	}
	152
	153	if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE))
	154	return;
	155
	156	val &= ~BYT_IOSF_OCP_TIMEOUT_BASE;
	157
	158	if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0,
	159	val)) {
	160	dev_err(dev, "%s write error\n", __func__);
	161	return;
	162	}
	163
	164	dev_dbg(dev, "%s completed\n", __func__);
	165	}
	166
	167	static bool sdhci_acpi_byt_defer(struct device *dev)
	168	{
	169	if (!sdhci_acpi_byt())
	170	return false;
	171
	172	if (!iosf_mbi_available())
	173	return true;
	174
	175	sdhci_acpi_byt_setting(dev);
	176
	177	return false;
	178	}
	179
	180	#else
	181
	182	static inline void sdhci_acpi_byt_setting(struct device *dev)
	183	{
	184	}
	185
	186	static inline bool sdhci_acpi_byt_defer(struct device *dev)
	187	{
188	return false;
189	}
190
191	#endif
192
6a645dd8 AH	193	static int bxt_get_cd(struct mmc_host *mmc)
	194	{
	195	int gpio_cd = mmc_gpio_get_cd(mmc);
	196	struct sdhci_host *host = mmc_priv(mmc);
	197	unsigned long flags;
	198	int ret = 0;
	199
	200	if (!gpio_cd)
	201	return 0;
	202
6a645dd8 AH	203	spin_lock_irqsave(&host->lock, flags);
	204
	205	if (host->flags & SDHCI_DEVICE_DEAD)
	206	goto out;
	207
	208	ret = !!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT);
	209	out:
	210	spin_unlock_irqrestore(&host->lock, flags);
	211
6a645dd8 AH	212	return ret;
	213	}
	214
7dafca83 AH	215	static int sdhci_acpi_emmc_probe_slot(struct platform_device *pdev,
7dafca83 AH	216	const char hid, const char uid)
578b36b6 GY	217	{
	218	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	219	struct sdhci_host *host;
	220
	221	if (!c \|\| !c->host)
	222	return 0;
	223
	224	host = c->host;
	225
94203042	226	/* Platform specific code during emmc probe slot goes here */
578b36b6	227
8024379e AH	228	if (hid && uid && !strcmp(hid, "80860F14") && !strcmp(uid, "1") &&
	229	sdhci_readl(host, SDHCI_CAPABILITIES) == 0x446cc8b2 &&
	230	sdhci_readl(host, SDHCI_CAPABILITIES_1) == 0x00000807)
	231	host->timeout_clk = 1000; /* 1000 kHz i.e. 1 MHz */
	232
578b36b6 GY	233	return 0;
	234	}
	235
7dafca83 AH	236	static int sdhci_acpi_sdio_probe_slot(struct platform_device *pdev,
7dafca83 AH	237	const char hid, const char uid)
578b36b6 GY	238	{
	239	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	240	struct sdhci_host *host;
	241
	242	if (!c \|\| !c->host)
	243	return 0;
	244
	245	host = c->host;
	246
94203042	247	/* Platform specific code during sdio probe slot goes here */
578b36b6 GY	248
	249	return 0;
	250	}
	251
7dafca83 AH	252	static int sdhci_acpi_sd_probe_slot(struct platform_device *pdev,
7dafca83 AH	253	const char hid, const char uid)
578b36b6 GY	254	{
	255	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	256	struct sdhci_host *host;
	257
	258	if (!c \|\| !c->host \|\| !c->slot)
	259	return 0;
	260
	261	host = c->host;
	262
94203042	263	/* Platform specific code during sd probe slot goes here */
578b36b6	264
6a645dd8 AH	265	if (hid && !strcmp(hid, "80865ACA"))
	266	host->mmc_host_ops.get_cd = bxt_get_cd;
	267
578b36b6 GY	268	return 0;
	269	}
	270
07a58883	271	static const struct sdhci_acpi_slot sdhci_acpi_slot_int_emmc = {
b04fa064	272	.chip = &sdhci_acpi_chip_int,
f25c3372	273	.caps = MMC_CAP_8_BIT_DATA \| MMC_CAP_NONREMOVABLE \|
9d65cb88 AH	274	MMC_CAP_HW_RESET \| MMC_CAP_1_8V_DDR \|
9d65cb88 AH	275	MMC_CAP_BUS_WIDTH_TEST \| MMC_CAP_WAIT_WHILE_BUSY,
07a58883 AH	276	.caps2 = MMC_CAP2_HC_ERASE_SZ,
07a58883 AH	277	.flags = SDHCI_ACPI_RUNTIME_PM,
e1f5633a	278	.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
e839b134 AH	279	.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN \|
	280	SDHCI_QUIRK2_STOP_WITH_TC \|
	281	SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400,
578b36b6	282	.probe_slot = sdhci_acpi_emmc_probe_slot,
07a58883 AH	283	};
07a58883 AH	284
e5571397	285	static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sdio = {
e1f5633a AH	286	.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION \|
e1f5633a AH	287	SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
e5571397	288	.quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON,
9d65cb88 AH	289	.caps = MMC_CAP_NONREMOVABLE \| MMC_CAP_POWER_OFF_CARD \|
9d65cb88 AH	290	MMC_CAP_BUS_WIDTH_TEST \| MMC_CAP_WAIT_WHILE_BUSY,
e5571397 AH	291	.flags = SDHCI_ACPI_RUNTIME_PM,
e5571397 AH	292	.pm_caps = MMC_PM_KEEP_POWER,
578b36b6	293	.probe_slot = sdhci_acpi_sdio_probe_slot,
e5571397 AH	294	};
e5571397 AH	295
07a58883	296	static const struct sdhci_acpi_slot sdhci_acpi_slot_int_sd = {
4fd4409c AH	297	.flags = SDHCI_ACPI_SD_CD \| SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL \|
4fd4409c AH	298	SDHCI_ACPI_RUNTIME_PM,
e1f5633a	299	.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
934e31b9 AH	300	.quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON \|
934e31b9 AH	301	SDHCI_QUIRK2_STOP_WITH_TC,
9d65cb88	302	.caps = MMC_CAP_BUS_WIDTH_TEST \| MMC_CAP_WAIT_WHILE_BUSY,
578b36b6	303	.probe_slot = sdhci_acpi_sd_probe_slot,
07a58883 AH	304	};
07a58883 AH	305
70cce2af PE	306	static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd_3v = {
	307	.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
	308	.quirks2 = SDHCI_QUIRK2_NO_1_8_V,
	309	.caps = MMC_CAP_NONREMOVABLE,
	310	};
	311
	312	static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = {
	313	.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION,
	314	.caps = MMC_CAP_NONREMOVABLE,
	315	};
	316
07a58883 AH	317	struct sdhci_acpi_uid_slot {
	318	const char *hid;
	319	const char *uid;
	320	const struct sdhci_acpi_slot *slot;
	321	};
	322
	323	static const struct sdhci_acpi_uid_slot sdhci_acpi_uids[] = {
e839b134 AH	324	{ "80865ACA", NULL, &sdhci_acpi_slot_int_sd },
	325	{ "80865ACC", NULL, &sdhci_acpi_slot_int_emmc },
	326	{ "80865AD0", NULL, &sdhci_acpi_slot_int_sdio },
07a58883 AH	327	{ "80860F14" , "1" , &sdhci_acpi_slot_int_emmc },
07a58883 AH	328	{ "80860F14" , "3" , &sdhci_acpi_slot_int_sd },
aad95dc4	329	{ "80860F16" , NULL, &sdhci_acpi_slot_int_sd },
07a58883	330	{ "INT33BB" , "2" , &sdhci_acpi_slot_int_sdio },
7147eaf3	331	{ "INT33BB" , "3" , &sdhci_acpi_slot_int_sd },
07a58883	332	{ "INT33C6" , NULL, &sdhci_acpi_slot_int_sdio },
07c001c1	333	{ "INT3436" , NULL, &sdhci_acpi_slot_int_sdio },
d0ed8e6b	334	{ "INT344D" , NULL, &sdhci_acpi_slot_int_sdio },
0cd2f044	335	{ "PNP0FFF" , "3" , &sdhci_acpi_slot_int_sd },
07a58883	336	{ "PNP0D40" },
70cce2af PE	337	{ "QCOM8051", NULL, &sdhci_acpi_slot_qcom_sd_3v },
70cce2af PE	338	{ "QCOM8052", NULL, &sdhci_acpi_slot_qcom_sd },
07a58883 AH	339	{ },
	340	};
	341
c4e05037	342	static const struct acpi_device_id sdhci_acpi_ids[] = {
e839b134 AH	343	{ "80865ACA" },
	344	{ "80865ACC" },
	345	{ "80865AD0" },
07a58883	346	{ "80860F14" },
aad95dc4	347	{ "80860F16" },
07a58883 AH	348	{ "INT33BB" },
07a58883 AH	349	{ "INT33C6" },
07c001c1	350	{ "INT3436" },
d0ed8e6b	351	{ "INT344D" },
07a58883	352	{ "PNP0D40" },
70cce2af PE	353	{ "QCOM8051" },
70cce2af PE	354	{ "QCOM8052" },
c4e05037 AH	355	{ },
	356	};
	357	MODULE_DEVICE_TABLE(acpi, sdhci_acpi_ids);
	358
3db35251 AH	359	static const struct sdhci_acpi_slot sdhci_acpi_get_slot(const char hid,
3db35251 AH	360	const char *uid)
c4e05037	361	{
07a58883 AH	362	const struct sdhci_acpi_uid_slot *u;
	363
	364	for (u = sdhci_acpi_uids; u->hid; u++) {
	365	if (strcmp(u->hid, hid))
	366	continue;
	367	if (!u->uid)
	368	return u->slot;
	369	if (uid && !strcmp(u->uid, uid))
	370	return u->slot;
	371	}
c4e05037 AH	372	return NULL;
	373	}
	374
4e608e4e	375	static int sdhci_acpi_probe(struct platform_device *pdev)
c4e05037 AH	376	{
	377	struct device *dev = &pdev->dev;
	378	acpi_handle handle = ACPI_HANDLE(dev);
	379	struct acpi_device *device;
	380	struct sdhci_acpi_host *c;
	381	struct sdhci_host *host;
	382	struct resource *iomem;
	383	resource_size_t len;
	384	const char *hid;
3db35251	385	const char *uid;
87875655	386	int err;
c4e05037 AH	387
	388	if (acpi_bus_get_device(handle, &device))
	389	return -ENODEV;
	390
	391	if (acpi_bus_get_status(device) \|\| !device->status.present)
	392	return -ENODEV;
	393
6e1c7d61 AH	394	if (sdhci_acpi_byt_defer(dev))
	395	return -EPROBE_DEFER;
	396
c4e05037	397	hid = acpi_device_hid(device);
3db35251	398	uid = device->pnp.unique_id;
c4e05037 AH	399
	400	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	401	if (!iomem)
	402	return -ENOMEM;
	403
	404	len = resource_size(iomem);
	405	if (len < 0x100)
	406	dev_err(dev, "Invalid iomem size!\n");
	407
	408	if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev)))
	409	return -ENOMEM;
	410
	411	host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host));
	412	if (IS_ERR(host))
	413	return PTR_ERR(host);
	414
	415	c = sdhci_priv(host);
	416	c->host = host;
3db35251	417	c->slot = sdhci_acpi_get_slot(hid, uid);
c4e05037 AH	418	c->pdev = pdev;
	419	c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM);
	420
	421	platform_set_drvdata(pdev, c);
	422
	423	host->hw_name = "ACPI";
	424	host->ops = &sdhci_acpi_ops_dflt;
	425	host->irq = platform_get_irq(pdev, 0);
	426
	427	host->ioaddr = devm_ioremap_nocache(dev, iomem->start,
	428	resource_size(iomem));
	429	if (host->ioaddr == NULL) {
	430	err = -ENOMEM;
	431	goto err_free;
	432	}
	433
c4e05037	434	if (c->slot) {
578b36b6	435	if (c->slot->probe_slot) {
7dafca83	436	err = c->slot->probe_slot(pdev, hid, uid);
578b36b6 GY	437	if (err)
	438	goto err_free;
	439	}
c4e05037 AH	440	if (c->slot->chip) {
	441	host->ops = c->slot->chip->ops;
	442	host->quirks \|= c->slot->chip->quirks;
	443	host->quirks2 \|= c->slot->chip->quirks2;
	444	host->mmc->caps \|= c->slot->chip->caps;
	445	host->mmc->caps2 \|= c->slot->chip->caps2;
	446	host->mmc->pm_caps \|= c->slot->chip->pm_caps;
	447	}
	448	host->quirks \|= c->slot->quirks;
	449	host->quirks2 \|= c->slot->quirks2;
	450	host->mmc->caps \|= c->slot->caps;
	451	host->mmc->caps2 \|= c->slot->caps2;
	452	host->mmc->pm_caps \|= c->slot->pm_caps;
	453	}
	454
0d3e3350 AH	455	host->mmc->caps2 \|= MMC_CAP2_NO_PRESCAN_POWERUP;
0d3e3350 AH	456
a61abe6e	457	if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) {
4fd4409c AH	458	bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL);
4fd4409c AH	459
89168b48	460	if (mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0, NULL)) {
4fd4409c	461	dev_warn(dev, "failed to setup card detect gpio\n");
a61abe6e	462	c->use_runtime_pm = false;
4fd4409c	463	}
a61abe6e AH	464	}
a61abe6e AH	465
4fd4409c AH	466	err = sdhci_add_host(host);
	467	if (err)
	468	goto err_free;
	469
c4e05037	470	if (c->use_runtime_pm) {
1d1ff458	471	pm_runtime_set_active(dev);
c4e05037 AH	472	pm_suspend_ignore_children(dev, 1);
	473	pm_runtime_set_autosuspend_delay(dev, 50);
	474	pm_runtime_use_autosuspend(dev);
	475	pm_runtime_enable(dev);
	476	}
	477
4e6a2ef9 FZ	478	device_enable_async_suspend(dev);
4e6a2ef9 FZ	479
c4e05037 AH	480	return 0;
	481
	482	err_free:
c4e05037 AH	483	sdhci_free_host(c->host);
	484	return err;
	485	}
	486
4e608e4e	487	static int sdhci_acpi_remove(struct platform_device *pdev)
c4e05037 AH	488	{
	489	struct sdhci_acpi_host *c = platform_get_drvdata(pdev);
	490	struct device *dev = &pdev->dev;
	491	int dead;
	492
	493	if (c->use_runtime_pm) {
	494	pm_runtime_get_sync(dev);
	495	pm_runtime_disable(dev);
	496	pm_runtime_put_noidle(dev);
	497	}
	498
578b36b6 GY	499	if (c->slot && c->slot->remove_slot)
	500	c->slot->remove_slot(pdev);
	501
c4e05037 AH	502	dead = (sdhci_readl(c->host, SDHCI_INT_STATUS) == ~0);
c4e05037 AH	503	sdhci_remove_host(c->host, dead);
c4e05037 AH	504	sdhci_free_host(c->host);
	505
	506	return 0;
	507	}
	508
	509	#ifdef CONFIG_PM_SLEEP
	510
	511	static int sdhci_acpi_suspend(struct device *dev)
	512	{
	513	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
	514
	515	return sdhci_suspend_host(c->host);
	516	}
	517
	518	static int sdhci_acpi_resume(struct device *dev)
	519	{
	520	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
	521
6e1c7d61 AH	522	sdhci_acpi_byt_setting(&c->pdev->dev);
6e1c7d61 AH	523
c4e05037 AH	524	return sdhci_resume_host(c->host);
	525	}
	526
	527	#else
	528
	529	#define sdhci_acpi_suspend NULL
	530	#define sdhci_acpi_resume NULL
	531
	532	#endif
	533
162d6f98	534	#ifdef CONFIG_PM
c4e05037 AH	535
	536	static int sdhci_acpi_runtime_suspend(struct device *dev)
	537	{
	538	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
	539
	540	return sdhci_runtime_suspend_host(c->host);
	541	}
	542
	543	static int sdhci_acpi_runtime_resume(struct device *dev)
	544	{
	545	struct sdhci_acpi_host *c = dev_get_drvdata(dev);
	546
6e1c7d61 AH	547	sdhci_acpi_byt_setting(&c->pdev->dev);
6e1c7d61 AH	548
c4e05037 AH	549	return sdhci_runtime_resume_host(c->host);
	550	}
	551
c4e05037 AH	552	#endif
	553
	554	static const struct dev_pm_ops sdhci_acpi_pm_ops = {
	555	.suspend = sdhci_acpi_suspend,
	556	.resume = sdhci_acpi_resume,
1d75f74b	557	SET_RUNTIME_PM_OPS(sdhci_acpi_runtime_suspend,
9b449e99	558	sdhci_acpi_runtime_resume, NULL)
c4e05037 AH	559	};
	560
	561	static struct platform_driver sdhci_acpi_driver = {
	562	.driver = {
	563	.name = "sdhci-acpi",
c4e05037 AH	564	.acpi_match_table = sdhci_acpi_ids,
	565	.pm = &sdhci_acpi_pm_ops,
	566	},
	567	.probe = sdhci_acpi_probe,
4e608e4e	568	.remove = sdhci_acpi_remove,
c4e05037 AH	569	};
	570
	571	module_platform_driver(sdhci_acpi_driver);
	572
	573	MODULE_DESCRIPTION("Secure Digital Host Controller Interface ACPI driver");
	574	MODULE_AUTHOR("Adrian Hunter");
	575	MODULE_LICENSE("GPL v2");