acer-wmi.c 30.5 KB
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/*
 *  Acer WMI Laptop Extras
 *
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 *  Copyright (C) 2007-2009	Carlos Corbacho <carlos@strangeworlds.co.uk>
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 *
 *  Based on acer_acpi:
 *    Copyright (C) 2005-2007	E.M. Smith
 *    Copyright (C) 2007-2008	Carlos Corbacho <cathectic@gmail.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/dmi.h>
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#include <linux/fb.h>
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#include <linux/backlight.h>
#include <linux/leds.h>
#include <linux/platform_device.h>
#include <linux/acpi.h>
#include <linux/i8042.h>
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#include <linux/rfkill.h>
#include <linux/workqueue.h>
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#include <linux/debugfs.h>
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#include <linux/slab.h>
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#include <acpi/acpi_drivers.h>

MODULE_AUTHOR("Carlos Corbacho");
MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
MODULE_LICENSE("GPL");

#define ACER_LOGPREFIX "acer-wmi: "
#define ACER_ERR KERN_ERR ACER_LOGPREFIX
#define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
#define ACER_INFO KERN_INFO ACER_LOGPREFIX

/*
 * The following defines quirks to get some specific functions to work
 * which are known to not be supported over ACPI-WMI (such as the mail LED
 * on WMID based Acer's)
 */
struct acer_quirks {
	const char *vendor;
	const char *model;
	u16 quirks;
};

/*
 * Magic Number
 * Meaning is unknown - this number is required for writing to ACPI for AMW0
 * (it's also used in acerhk when directly accessing the BIOS)
 */
#define ACER_AMW0_WRITE	0x9610

/*
 * Bit masks for the AMW0 interface
 */
#define ACER_AMW0_WIRELESS_MASK  0x35
#define ACER_AMW0_BLUETOOTH_MASK 0x34
#define ACER_AMW0_MAILLED_MASK   0x31

/*
 * Method IDs for WMID interface
 */
#define ACER_WMID_GET_WIRELESS_METHODID		1
#define ACER_WMID_GET_BLUETOOTH_METHODID	2
#define ACER_WMID_GET_BRIGHTNESS_METHODID	3
#define ACER_WMID_SET_WIRELESS_METHODID		4
#define ACER_WMID_SET_BLUETOOTH_METHODID	5
#define ACER_WMID_SET_BRIGHTNESS_METHODID	6
#define ACER_WMID_GET_THREEG_METHODID		10
#define ACER_WMID_SET_THREEG_METHODID		11

/*
 * Acer ACPI method GUIDs
 */
#define AMW0_GUID1		"67C3371D-95A3-4C37-BB61-DD47B491DAAB"
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#define AMW0_GUID2		"431F16ED-0C2B-444C-B267-27DEB140CF9C"
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#define WMID_GUID1		"6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3"
#define WMID_GUID2		"95764E09-FB56-4e83-B31A-37761F60994A"

MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");

/*
 * Interface capability flags
 */
#define ACER_CAP_MAILLED		(1<<0)
#define ACER_CAP_WIRELESS		(1<<1)
#define ACER_CAP_BLUETOOTH		(1<<2)
#define ACER_CAP_BRIGHTNESS		(1<<3)
#define ACER_CAP_THREEG			(1<<4)
#define ACER_CAP_ANY			(0xFFFFFFFF)

/*
 * Interface type flags
 */
enum interface_flags {
	ACER_AMW0,
	ACER_AMW0_V2,
	ACER_WMID,
};

#define ACER_DEFAULT_WIRELESS  0
#define ACER_DEFAULT_BLUETOOTH 0
#define ACER_DEFAULT_MAILLED   0
#define ACER_DEFAULT_THREEG    0

static int max_brightness = 0xF;

static int mailled = -1;
static int brightness = -1;
static int threeg = -1;
static int force_series;

module_param(mailled, int, 0444);
module_param(brightness, int, 0444);
module_param(threeg, int, 0444);
module_param(force_series, int, 0444);
MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
MODULE_PARM_DESC(force_series, "Force a different laptop series");

struct acer_data {
	int mailled;
	int threeg;
	int brightness;
};

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struct acer_debug {
	struct dentry *root;
	struct dentry *devices;
	u32 wmid_devices;
};

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static struct rfkill *wireless_rfkill;
static struct rfkill *bluetooth_rfkill;

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/* Each low-level interface must define at least some of the following */
struct wmi_interface {
	/* The WMI device type */
	u32 type;

	/* The capabilities this interface provides */
	u32 capability;

	/* Private data for the current interface */
	struct acer_data data;
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	/* debugfs entries associated with this interface */
	struct acer_debug debug;
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};

/* The static interface pointer, points to the currently detected interface */
static struct wmi_interface *interface;

/*
 * Embedded Controller quirks
 * Some laptops require us to directly access the EC to either enable or query
 * features that are not available through WMI.
 */

struct quirk_entry {
	u8 wireless;
	u8 mailled;
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	s8 brightness;
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	u8 bluetooth;
};

static struct quirk_entry *quirks;

static void set_quirks(void)
{
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	if (!interface)
		return;

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	if (quirks->mailled)
		interface->capability |= ACER_CAP_MAILLED;

	if (quirks->brightness)
		interface->capability |= ACER_CAP_BRIGHTNESS;
}

static int dmi_matched(const struct dmi_system_id *dmi)
{
	quirks = dmi->driver_data;
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	return 1;
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}

static struct quirk_entry quirk_unknown = {
};

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static struct quirk_entry quirk_acer_aspire_1520 = {
	.brightness = -1,
};

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static struct quirk_entry quirk_acer_travelmate_2490 = {
	.mailled = 1,
};

/* This AMW0 laptop has no bluetooth */
static struct quirk_entry quirk_medion_md_98300 = {
	.wireless = 1,
};

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static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
	.wireless = 2,
};

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/* The Aspire One has a dummy ACPI-WMI interface - disable it */
static struct dmi_system_id __devinitdata acer_blacklist[] = {
	{
		.ident = "Acer Aspire One (SSD)",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
			DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
		},
	},
	{
		.ident = "Acer Aspire One (HDD)",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
			DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
		},
	},
	{}
};

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static struct dmi_system_id acer_quirks[] = {
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	{
		.callback = dmi_matched,
		.ident = "Acer Aspire 1360",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
		},
		.driver_data = &quirk_acer_aspire_1520,
	},
	{
		.callback = dmi_matched,
		.ident = "Acer Aspire 1520",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
		},
		.driver_data = &quirk_acer_aspire_1520,
	},
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	{
		.callback = dmi_matched,
		.ident = "Acer Aspire 3100",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
		},
		.driver_data = &quirk_acer_travelmate_2490,
	},
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	{
		.callback = dmi_matched,
		.ident = "Acer Aspire 3610",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
		},
		.driver_data = &quirk_acer_travelmate_2490,
	},
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	{
		.callback = dmi_matched,
		.ident = "Acer Aspire 5100",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
		},
		.driver_data = &quirk_acer_travelmate_2490,
	},
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	{
		.callback = dmi_matched,
		.ident = "Acer Aspire 5610",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
		},
		.driver_data = &quirk_acer_travelmate_2490,
	},
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	{
		.callback = dmi_matched,
		.ident = "Acer Aspire 5630",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
		},
		.driver_data = &quirk_acer_travelmate_2490,
	},
	{
		.callback = dmi_matched,
		.ident = "Acer Aspire 5650",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
		},
		.driver_data = &quirk_acer_travelmate_2490,
	},
	{
		.callback = dmi_matched,
		.ident = "Acer Aspire 5680",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
		},
		.driver_data = &quirk_acer_travelmate_2490,
	},
	{
		.callback = dmi_matched,
		.ident = "Acer Aspire 9110",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
		},
		.driver_data = &quirk_acer_travelmate_2490,
	},
	{
		.callback = dmi_matched,
		.ident = "Acer TravelMate 2490",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
			DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
		},
		.driver_data = &quirk_acer_travelmate_2490,
	},
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	{
		.callback = dmi_matched,
		.ident = "Acer TravelMate 4200",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
			DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
		},
		.driver_data = &quirk_acer_travelmate_2490,
	},
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	{
		.callback = dmi_matched,
		.ident = "Fujitsu Siemens Amilo Li 1718",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
			DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
		},
		.driver_data = &quirk_fujitsu_amilo_li_1718,
	},
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	{
		.callback = dmi_matched,
		.ident = "Medion MD 98300",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
			DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
		},
		.driver_data = &quirk_medion_md_98300,
	},
	{}
};

/* Find which quirks are needed for a particular vendor/ model pair */
static void find_quirks(void)
{
	if (!force_series) {
		dmi_check_system(acer_quirks);
	} else if (force_series == 2490) {
		quirks = &quirk_acer_travelmate_2490;
	}

	if (quirks == NULL)
		quirks = &quirk_unknown;

	set_quirks();
}

/*
 * General interface convenience methods
 */

static bool has_cap(u32 cap)
{
	if ((interface->capability & cap) != 0)
		return 1;

	return 0;
}

/*
 * AMW0 (V1) interface
 */
struct wmab_args {
	u32 eax;
	u32 ebx;
	u32 ecx;
	u32 edx;
};

struct wmab_ret {
	u32 eax;
	u32 ebx;
	u32 ecx;
	u32 edx;
	u32 eex;
};

static acpi_status wmab_execute(struct wmab_args *regbuf,
struct acpi_buffer *result)
{
	struct acpi_buffer input;
	acpi_status status;
	input.length = sizeof(struct wmab_args);
	input.pointer = (u8 *)regbuf;

	status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);

	return status;
}

static acpi_status AMW0_get_u32(u32 *value, u32 cap,
struct wmi_interface *iface)
{
	int err;
	u8 result;

	switch (cap) {
	case ACER_CAP_MAILLED:
		switch (quirks->mailled) {
		default:
			err = ec_read(0xA, &result);
			if (err)
				return AE_ERROR;
			*value = (result >> 7) & 0x1;
			return AE_OK;
		}
		break;
	case ACER_CAP_WIRELESS:
		switch (quirks->wireless) {
		case 1:
			err = ec_read(0x7B, &result);
			if (err)
				return AE_ERROR;
			*value = result & 0x1;
			return AE_OK;
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		case 2:
			err = ec_read(0x71, &result);
			if (err)
				return AE_ERROR;
			*value = result & 0x1;
			return AE_OK;
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		default:
			err = ec_read(0xA, &result);
			if (err)
				return AE_ERROR;
			*value = (result >> 2) & 0x1;
			return AE_OK;
		}
		break;
	case ACER_CAP_BLUETOOTH:
		switch (quirks->bluetooth) {
		default:
			err = ec_read(0xA, &result);
			if (err)
				return AE_ERROR;
			*value = (result >> 4) & 0x1;
			return AE_OK;
		}
		break;
	case ACER_CAP_BRIGHTNESS:
		switch (quirks->brightness) {
		default:
			err = ec_read(0x83, &result);
			if (err)
				return AE_ERROR;
			*value = result;
			return AE_OK;
		}
		break;
	default:
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		return AE_ERROR;
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	}
	return AE_OK;
}

static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
{
	struct wmab_args args;

	args.eax = ACER_AMW0_WRITE;
	args.ebx = value ? (1<<8) : 0;
	args.ecx = args.edx = 0;

	switch (cap) {
	case ACER_CAP_MAILLED:
		if (value > 1)
			return AE_BAD_PARAMETER;
		args.ebx |= ACER_AMW0_MAILLED_MASK;
		break;
	case ACER_CAP_WIRELESS:
		if (value > 1)
			return AE_BAD_PARAMETER;
		args.ebx |= ACER_AMW0_WIRELESS_MASK;
		break;
	case ACER_CAP_BLUETOOTH:
		if (value > 1)
			return AE_BAD_PARAMETER;
		args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
		break;
	case ACER_CAP_BRIGHTNESS:
		if (value > max_brightness)
			return AE_BAD_PARAMETER;
		switch (quirks->brightness) {
		default:
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			return ec_write(0x83, value);
			break;
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		}
	default:
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		return AE_ERROR;
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	}

	/* Actually do the set */
	return wmab_execute(&args, NULL);
}

static acpi_status AMW0_find_mailled(void)
{
	struct wmab_args args;
	struct wmab_ret ret;
	acpi_status status = AE_OK;
	struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object *obj;

	args.eax = 0x86;
	args.ebx = args.ecx = args.edx = 0;

	status = wmab_execute(&args, &out);
	if (ACPI_FAILURE(status))
		return status;

	obj = (union acpi_object *) out.pointer;
	if (obj && obj->type == ACPI_TYPE_BUFFER &&
	obj->buffer.length == sizeof(struct wmab_ret)) {
		ret = *((struct wmab_ret *) obj->buffer.pointer);
	} else {
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		kfree(out.pointer);
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		return AE_ERROR;
	}

	if (ret.eex & 0x1)
		interface->capability |= ACER_CAP_MAILLED;

	kfree(out.pointer);

	return AE_OK;
}

static acpi_status AMW0_set_capabilities(void)
{
	struct wmab_args args;
	struct wmab_ret ret;
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	acpi_status status;
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	struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object *obj;

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	/*
	 * On laptops with this strange GUID (non Acer), normal probing doesn't
	 * work.
	 */
	if (wmi_has_guid(AMW0_GUID2)) {
		interface->capability |= ACER_CAP_WIRELESS;
		return AE_OK;
	}

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	args.eax = ACER_AMW0_WRITE;
	args.ecx = args.edx = 0;

	args.ebx = 0xa2 << 8;
	args.ebx |= ACER_AMW0_WIRELESS_MASK;

	status = wmab_execute(&args, &out);
	if (ACPI_FAILURE(status))
		return status;

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	obj = out.pointer;
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	if (obj && obj->type == ACPI_TYPE_BUFFER &&
	obj->buffer.length == sizeof(struct wmab_ret)) {
		ret = *((struct wmab_ret *) obj->buffer.pointer);
	} else {
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		status = AE_ERROR;
		goto out;
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	}

	if (ret.eax & 0x1)
		interface->capability |= ACER_CAP_WIRELESS;

	args.ebx = 2 << 8;
	args.ebx |= ACER_AMW0_BLUETOOTH_MASK;

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	/*
	 * It's ok to use existing buffer for next wmab_execute call.
	 * But we need to kfree(out.pointer) if next wmab_execute fail.
	 */
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	status = wmab_execute(&args, &out);
	if (ACPI_FAILURE(status))
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		goto out;
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	obj = (union acpi_object *) out.pointer;
	if (obj && obj->type == ACPI_TYPE_BUFFER
	&& obj->buffer.length == sizeof(struct wmab_ret)) {
		ret = *((struct wmab_ret *) obj->buffer.pointer);
	} else {
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		status = AE_ERROR;
		goto out;
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	}

	if (ret.eax & 0x1)
		interface->capability |= ACER_CAP_BLUETOOTH;

	/*
	 * This appears to be safe to enable, since all Wistron based laptops
	 * appear to use the same EC register for brightness, even if they
	 * differ for wireless, etc
	 */
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	if (quirks->brightness >= 0)
		interface->capability |= ACER_CAP_BRIGHTNESS;
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	status = AE_OK;
out:
	kfree(out.pointer);
	return status;
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}

static struct wmi_interface AMW0_interface = {
	.type = ACER_AMW0,
};

static struct wmi_interface AMW0_V2_interface = {
	.type = ACER_AMW0_V2,
};

/*
 * New interface (The WMID interface)
 */
static acpi_status
WMI_execute_u32(u32 method_id, u32 in, u32 *out)
{
	struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
	struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object *obj;
	u32 tmp;
	acpi_status status;

	status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);

	if (ACPI_FAILURE(status))
		return status;

	obj = (union acpi_object *) result.pointer;
	if (obj && obj->type == ACPI_TYPE_BUFFER &&
		obj->buffer.length == sizeof(u32)) {
		tmp = *((u32 *) obj->buffer.pointer);
	} else {
		tmp = 0;
	}

	if (out)
		*out = tmp;

	kfree(result.pointer);

	return status;
}

static acpi_status WMID_get_u32(u32 *value, u32 cap,
struct wmi_interface *iface)
{
	acpi_status status;
	u8 tmp;
	u32 result, method_id = 0;

	switch (cap) {
	case ACER_CAP_WIRELESS:
		method_id = ACER_WMID_GET_WIRELESS_METHODID;
		break;
	case ACER_CAP_BLUETOOTH:
		method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
		break;
	case ACER_CAP_BRIGHTNESS:
		method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
		break;
	case ACER_CAP_THREEG:
		method_id = ACER_WMID_GET_THREEG_METHODID;
		break;
	case ACER_CAP_MAILLED:
		if (quirks->mailled == 1) {
			ec_read(0x9f, &tmp);
			*value = tmp & 0x1;
			return 0;
		}
	default:
714
		return AE_ERROR;
715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754
	}
	status = WMI_execute_u32(method_id, 0, &result);

	if (ACPI_SUCCESS(status))
		*value = (u8)result;

	return status;
}

static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
{
	u32 method_id = 0;
	char param;

	switch (cap) {
	case ACER_CAP_BRIGHTNESS:
		if (value > max_brightness)
			return AE_BAD_PARAMETER;
		method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
		break;
	case ACER_CAP_WIRELESS:
		if (value > 1)
			return AE_BAD_PARAMETER;
		method_id = ACER_WMID_SET_WIRELESS_METHODID;
		break;
	case ACER_CAP_BLUETOOTH:
		if (value > 1)
			return AE_BAD_PARAMETER;
		method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
		break;
	case ACER_CAP_THREEG:
		if (value > 1)
			return AE_BAD_PARAMETER;
		method_id = ACER_WMID_SET_THREEG_METHODID;
		break;
	case ACER_CAP_MAILLED:
		if (value > 1)
			return AE_BAD_PARAMETER;
		if (quirks->mailled == 1) {
			param = value ? 0x92 : 0x93;
755
			i8042_lock_chip();
756
			i8042_command(&param, 0x1059);
757
			i8042_unlock_chip();
758 759 760 761
			return 0;
		}
		break;
	default:
762
		return AE_ERROR;
763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782
	}
	return WMI_execute_u32(method_id, (u32)value, NULL);
}

static acpi_status WMID_set_capabilities(void)
{
	struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
	union acpi_object *obj;
	acpi_status status;
	u32 devices;

	status = wmi_query_block(WMID_GUID2, 1, &out);
	if (ACPI_FAILURE(status))
		return status;

	obj = (union acpi_object *) out.pointer;
	if (obj && obj->type == ACPI_TYPE_BUFFER &&
		obj->buffer.length == sizeof(u32)) {
		devices = *((u32 *) obj->buffer.pointer);
	} else {
783
		kfree(out.pointer);
784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799
		return AE_ERROR;
	}

	/* Not sure on the meaning of the relevant bits yet to detect these */
	interface->capability |= ACER_CAP_WIRELESS;
	interface->capability |= ACER_CAP_THREEG;

	/* WMID always provides brightness methods */
	interface->capability |= ACER_CAP_BRIGHTNESS;

	if (devices & 0x10)
		interface->capability |= ACER_CAP_BLUETOOTH;

	if (!(devices & 0x20))
		max_brightness = 0x9;

800
	kfree(out.pointer);
801 802 803 804 805 806 807 808 809 810 811 812 813
	return status;
}

static struct wmi_interface wmid_interface = {
	.type = ACER_WMID,
};

/*
 * Generic Device (interface-independent)
 */

static acpi_status get_u32(u32 *value, u32 cap)
{
814
	acpi_status status = AE_ERROR;
815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834

	switch (interface->type) {
	case ACER_AMW0:
		status = AMW0_get_u32(value, cap, interface);
		break;
	case ACER_AMW0_V2:
		if (cap == ACER_CAP_MAILLED) {
			status = AMW0_get_u32(value, cap, interface);
			break;
		}
	case ACER_WMID:
		status = WMID_get_u32(value, cap, interface);
		break;
	}

	return status;
}

static acpi_status set_u32(u32 value, u32 cap)
{
835 836
	acpi_status status;

837 838 839 840 841
	if (interface->capability & cap) {
		switch (interface->type) {
		case ACER_AMW0:
			return AMW0_set_u32(value, cap, interface);
		case ACER_AMW0_V2:
842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858
			if (cap == ACER_CAP_MAILLED)
				return AMW0_set_u32(value, cap, interface);

			/*
			 * On some models, some WMID methods don't toggle
			 * properly. For those cases, we want to run the AMW0
			 * method afterwards to be certain we've really toggled
			 * the device state.
			 */
			if (cap == ACER_CAP_WIRELESS ||
				cap == ACER_CAP_BLUETOOTH) {
				status = WMID_set_u32(value, cap, interface);
				if (ACPI_FAILURE(status))
					return status;

				return AMW0_set_u32(value, cap, interface);
			}
859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888
		case ACER_WMID:
			return WMID_set_u32(value, cap, interface);
		default:
			return AE_BAD_PARAMETER;
		}
	}
	return AE_BAD_PARAMETER;
}

static void __init acer_commandline_init(void)
{
	/*
	 * These will all fail silently if the value given is invalid, or the
	 * capability isn't available on the given interface
	 */
	set_u32(mailled, ACER_CAP_MAILLED);
	set_u32(threeg, ACER_CAP_THREEG);
	set_u32(brightness, ACER_CAP_BRIGHTNESS);
}

/*
 * LED device (Mail LED only, no other LEDs known yet)
 */
static void mail_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
	set_u32(value, ACER_CAP_MAILLED);
}

static struct led_classdev mail_led = {
889
	.name = "acer-wmi::mail",
890 891 892
	.brightness_set = mail_led_set,
};

893
static int __devinit acer_led_init(struct device *dev)
894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916
{
	return led_classdev_register(dev, &mail_led);
}

static void acer_led_exit(void)
{
	led_classdev_unregister(&mail_led);
}

/*
 * Backlight device
 */
static struct backlight_device *acer_backlight_device;

static int read_brightness(struct backlight_device *bd)
{
	u32 value;
	get_u32(&value, ACER_CAP_BRIGHTNESS);
	return value;
}

static int update_bl_status(struct backlight_device *bd)
{
917 918 919 920 921 922 923 924 925
	int intensity = bd->props.brightness;

	if (bd->props.power != FB_BLANK_UNBLANK)
		intensity = 0;
	if (bd->props.fb_blank != FB_BLANK_UNBLANK)
		intensity = 0;

	set_u32(intensity, ACER_CAP_BRIGHTNESS);

926 927 928 929 930 931 932 933
	return 0;
}

static struct backlight_ops acer_bl_ops = {
	.get_brightness = read_brightness,
	.update_status = update_bl_status,
};

934
static int __devinit acer_backlight_init(struct device *dev)
935
{
936
	struct backlight_properties props;
937 938
	struct backlight_device *bd;

939 940 941 942
	memset(&props, 0, sizeof(struct backlight_properties));
	props.max_brightness = max_brightness;
	bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
				       &props);
943 944 945 946 947 948 949 950
	if (IS_ERR(bd)) {
		printk(ACER_ERR "Could not register Acer backlight device\n");
		acer_backlight_device = NULL;
		return PTR_ERR(bd);
	}

	acer_backlight_device = bd;

951
	bd->props.power = FB_BLANK_UNBLANK;
952
	bd->props.brightness = read_brightness(bd);
953 954 955 956
	backlight_update_status(bd);
	return 0;
}

957
static void acer_backlight_exit(void)
958 959 960 961
{
	backlight_device_unregister(acer_backlight_device);
}

962 963 964 965 966 967 968 969 970 971 972 973
/*
 * Rfkill devices
 */
static void acer_rfkill_update(struct work_struct *ignored);
static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
static void acer_rfkill_update(struct work_struct *ignored)
{
	u32 state;
	acpi_status status;

	status = get_u32(&state, ACER_CAP_WIRELESS);
	if (ACPI_SUCCESS(status))
T
Troy Moure 已提交
974
		rfkill_set_sw_state(wireless_rfkill, !state);
975 976 977 978

	if (has_cap(ACER_CAP_BLUETOOTH)) {
		status = get_u32(&state, ACER_CAP_BLUETOOTH);
		if (ACPI_SUCCESS(status))
T
Troy Moure 已提交
979
			rfkill_set_sw_state(bluetooth_rfkill, !state);
980 981
	}

982
	schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
983 984
}

J
Johannes Berg 已提交
985
static int acer_rfkill_set(void *data, bool blocked)
986 987
{
	acpi_status status;
J
Johannes Berg 已提交
988
	u32 cap = (unsigned long)data;
A
Alan Jenkins 已提交
989
	status = set_u32(!blocked, cap);
990 991 992 993 994
	if (ACPI_FAILURE(status))
		return -ENODEV;
	return 0;
}

J
Johannes Berg 已提交
995 996 997 998 999 1000 1001
static const struct rfkill_ops acer_rfkill_ops = {
	.set_block = acer_rfkill_set,
};

static struct rfkill *acer_rfkill_register(struct device *dev,
					   enum rfkill_type type,
					   char *name, u32 cap)
1002 1003 1004 1005
{
	int err;
	struct rfkill *rfkill_dev;

J
Johannes Berg 已提交
1006 1007 1008
	rfkill_dev = rfkill_alloc(name, dev, type,
				  &acer_rfkill_ops,
				  (void *)(unsigned long)cap);
1009 1010 1011 1012 1013
	if (!rfkill_dev)
		return ERR_PTR(-ENOMEM);

	err = rfkill_register(rfkill_dev);
	if (err) {
J
Johannes Berg 已提交
1014
		rfkill_destroy(rfkill_dev);
1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032
		return ERR_PTR(err);
	}
	return rfkill_dev;
}

static int acer_rfkill_init(struct device *dev)
{
	wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
		"acer-wireless", ACER_CAP_WIRELESS);
	if (IS_ERR(wireless_rfkill))
		return PTR_ERR(wireless_rfkill);

	if (has_cap(ACER_CAP_BLUETOOTH)) {
		bluetooth_rfkill = acer_rfkill_register(dev,
			RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
			ACER_CAP_BLUETOOTH);
		if (IS_ERR(bluetooth_rfkill)) {
			rfkill_unregister(wireless_rfkill);
J
Johannes Berg 已提交
1033
			rfkill_destroy(wireless_rfkill);
1034 1035 1036 1037
			return PTR_ERR(bluetooth_rfkill);
		}
	}

1038
	schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1039 1040 1041 1042 1043 1044 1045

	return 0;
}

static void acer_rfkill_exit(void)
{
	cancel_delayed_work_sync(&acer_rfkill_work);
J
Johannes Berg 已提交
1046

1047
	rfkill_unregister(wireless_rfkill);
J
Johannes Berg 已提交
1048 1049
	rfkill_destroy(wireless_rfkill);

1050 1051
	if (has_cap(ACER_CAP_BLUETOOTH)) {
		rfkill_unregister(bluetooth_rfkill);
J
Johannes Berg 已提交
1052
		rfkill_destroy(bluetooth_rfkill);
1053 1054 1055 1056
	}
	return;
}

1057
/*
1058
 * sysfs interface
1059
 */
1060 1061 1062
static ssize_t show_bool_threeg(struct device *dev,
	struct device_attribute *attr, char *buf)
{
1063
	u32 result; \
1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080
	acpi_status status = get_u32(&result, ACER_CAP_THREEG);
	if (ACPI_SUCCESS(status))
		return sprintf(buf, "%u\n", result);
	return sprintf(buf, "Read error\n");
}

static ssize_t set_bool_threeg(struct device *dev,
	struct device_attribute *attr, const char *buf, size_t count)
{
	u32 tmp = simple_strtoul(buf, NULL, 10);
	acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
		if (ACPI_FAILURE(status))
			return -EINVAL;
	return count;
}
static DEVICE_ATTR(threeg, S_IWUGO | S_IRUGO | S_IWUSR, show_bool_threeg,
	set_bool_threeg);
1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096

static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
	char *buf)
{
	switch (interface->type) {
	case ACER_AMW0:
		return sprintf(buf, "AMW0\n");
	case ACER_AMW0_V2:
		return sprintf(buf, "AMW0 v2\n");
	case ACER_WMID:
		return sprintf(buf, "WMID\n");
	default:
		return sprintf(buf, "Error!\n");
	}
}

1097
static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1098

1099 1100 1101 1102 1103 1104 1105 1106
/*
 * debugfs functions
 */
static u32 get_wmid_devices(void)
{
	struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
	union acpi_object *obj;
	acpi_status status;
1107
	u32 devices = 0;
1108 1109 1110 1111 1112 1113 1114 1115

	status = wmi_query_block(WMID_GUID2, 1, &out);
	if (ACPI_FAILURE(status))
		return 0;

	obj = (union acpi_object *) out.pointer;
	if (obj && obj->type == ACPI_TYPE_BUFFER &&
		obj->buffer.length == sizeof(u32)) {
1116
		devices = *((u32 *) obj->buffer.pointer);
1117
	}
1118 1119 1120

	kfree(out.pointer);
	return devices;
1121 1122
}

1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141
/*
 * Platform device
 */
static int __devinit acer_platform_probe(struct platform_device *device)
{
	int err;

	if (has_cap(ACER_CAP_MAILLED)) {
		err = acer_led_init(&device->dev);
		if (err)
			goto error_mailled;
	}

	if (has_cap(ACER_CAP_BRIGHTNESS)) {
		err = acer_backlight_init(&device->dev);
		if (err)
			goto error_brightness;
	}

1142
	err = acer_rfkill_init(&device->dev);
1143 1144
	if (err)
		goto error_rfkill;
1145 1146

	return err;
1147

1148 1149 1150
error_rfkill:
	if (has_cap(ACER_CAP_BRIGHTNESS))
		acer_backlight_exit();
1151
error_brightness:
1152 1153
	if (has_cap(ACER_CAP_MAILLED))
		acer_led_exit();
1154 1155 1156 1157 1158 1159 1160 1161 1162 1163
error_mailled:
	return err;
}

static int acer_platform_remove(struct platform_device *device)
{
	if (has_cap(ACER_CAP_MAILLED))
		acer_led_exit();
	if (has_cap(ACER_CAP_BRIGHTNESS))
		acer_backlight_exit();
1164 1165

	acer_rfkill_exit();
1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252
	return 0;
}

static int acer_platform_suspend(struct platform_device *dev,
pm_message_t state)
{
	u32 value;
	struct acer_data *data = &interface->data;

	if (!data)
		return -ENOMEM;

	if (has_cap(ACER_CAP_MAILLED)) {
		get_u32(&value, ACER_CAP_MAILLED);
		data->mailled = value;
	}

	if (has_cap(ACER_CAP_BRIGHTNESS)) {
		get_u32(&value, ACER_CAP_BRIGHTNESS);
		data->brightness = value;
	}

	return 0;
}

static int acer_platform_resume(struct platform_device *device)
{
	struct acer_data *data = &interface->data;

	if (!data)
		return -ENOMEM;

	if (has_cap(ACER_CAP_MAILLED))
		set_u32(data->mailled, ACER_CAP_MAILLED);

	if (has_cap(ACER_CAP_BRIGHTNESS))
		set_u32(data->brightness, ACER_CAP_BRIGHTNESS);

	return 0;
}

static struct platform_driver acer_platform_driver = {
	.driver = {
		.name = "acer-wmi",
		.owner = THIS_MODULE,
	},
	.probe = acer_platform_probe,
	.remove = acer_platform_remove,
	.suspend = acer_platform_suspend,
	.resume = acer_platform_resume,
};

static struct platform_device *acer_platform_device;

static int remove_sysfs(struct platform_device *device)
{
	if (has_cap(ACER_CAP_THREEG))
		device_remove_file(&device->dev, &dev_attr_threeg);

	device_remove_file(&device->dev, &dev_attr_interface);

	return 0;
}

static int create_sysfs(void)
{
	int retval = -ENOMEM;

	if (has_cap(ACER_CAP_THREEG)) {
		retval = device_create_file(&acer_platform_device->dev,
			&dev_attr_threeg);
		if (retval)
			goto error_sysfs;
	}

	retval = device_create_file(&acer_platform_device->dev,
		&dev_attr_interface);
	if (retval)
		goto error_sysfs;

	return 0;

error_sysfs:
		remove_sysfs(acer_platform_device);
	return retval;
}

1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275
static void remove_debugfs(void)
{
	debugfs_remove(interface->debug.devices);
	debugfs_remove(interface->debug.root);
}

static int create_debugfs(void)
{
	interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
	if (!interface->debug.root) {
		printk(ACER_ERR "Failed to create debugfs directory");
		return -ENOMEM;
	}

	interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
					interface->debug.root,
					&interface->debug.wmid_devices);
	if (!interface->debug.devices)
		goto error_debugfs;

	return 0;

error_debugfs:
1276
	remove_debugfs();
1277 1278 1279
	return -ENOMEM;
}

1280 1281 1282 1283
static int __init acer_wmi_init(void)
{
	int err;

1284
	printk(ACER_INFO "Acer Laptop ACPI-WMI Extras\n");
1285

1286 1287 1288 1289 1290 1291
	if (dmi_check_system(acer_blacklist)) {
		printk(ACER_INFO "Blacklisted hardware detected - "
				"not loading\n");
		return -ENODEV;
	}

1292 1293
	find_quirks();

1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304
	/*
	 * Detect which ACPI-WMI interface we're using.
	 */
	if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
		interface = &AMW0_V2_interface;

	if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
		interface = &wmid_interface;

	if (wmi_has_guid(WMID_GUID2) && interface) {
		if (ACPI_FAILURE(WMID_set_capabilities())) {
1305 1306
			printk(ACER_ERR "Unable to detect available WMID "
					"devices\n");
1307 1308 1309
			return -ENODEV;
		}
	} else if (!wmi_has_guid(WMID_GUID2) && interface) {
1310
		printk(ACER_ERR "No WMID device detection method found\n");
1311 1312 1313 1314 1315 1316 1317
		return -ENODEV;
	}

	if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
		interface = &AMW0_interface;

		if (ACPI_FAILURE(AMW0_set_capabilities())) {
1318 1319
			printk(ACER_ERR "Unable to detect available AMW0 "
					"devices\n");
1320 1321 1322 1323
			return -ENODEV;
		}
	}

1324 1325
	if (wmi_has_guid(AMW0_GUID1))
		AMW0_find_mailled();
1326 1327

	if (!interface) {
1328 1329
		printk(ACER_ERR "No or unsupported WMI interface, unable to "
				"load\n");
1330 1331 1332
		return -ENODEV;
	}

1333 1334
	set_quirks();

1335
	if (acpi_video_backlight_support() && has_cap(ACER_CAP_BRIGHTNESS)) {
1336 1337 1338 1339 1340
		interface->capability &= ~ACER_CAP_BRIGHTNESS;
		printk(ACER_INFO "Brightness must be controlled by "
		       "generic video driver\n");
	}

1341 1342
	err = platform_driver_register(&acer_platform_driver);
	if (err) {
1343 1344 1345
		printk(ACER_ERR "Unable to register platform driver.\n");
		goto error_platform_register;
	}
1346

1347
	acer_platform_device = platform_device_alloc("acer-wmi", -1);
1348 1349 1350 1351 1352 1353 1354 1355
	if (!acer_platform_device) {
		err = -ENOMEM;
		goto error_device_alloc;
	}

	err = platform_device_add(acer_platform_device);
	if (err)
		goto error_device_add;
1356 1357 1358

	err = create_sysfs();
	if (err)
1359
		goto error_create_sys;
1360

1361 1362 1363 1364
	if (wmi_has_guid(WMID_GUID2)) {
		interface->debug.wmid_devices = get_wmid_devices();
		err = create_debugfs();
		if (err)
1365
			goto error_create_debugfs;
1366 1367
	}

1368 1369 1370 1371 1372
	/* Override any initial settings with values from the commandline */
	acer_commandline_init();

	return 0;

1373 1374 1375 1376 1377 1378 1379 1380
error_create_debugfs:
	remove_sysfs(acer_platform_device);
error_create_sys:
	platform_device_del(acer_platform_device);
error_device_add:
	platform_device_put(acer_platform_device);
error_device_alloc:
	platform_driver_unregister(&acer_platform_driver);
1381
error_platform_register:
1382
	return err;
1383 1384 1385 1386 1387
}

static void __exit acer_wmi_exit(void)
{
	remove_sysfs(acer_platform_device);
1388
	remove_debugfs();
1389
	platform_device_unregister(acer_platform_device);
1390 1391 1392 1393 1394 1395 1396 1397
	platform_driver_unregister(&acer_platform_driver);

	printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
	return;
}

module_init(acer_wmi_init);
module_exit(acer_wmi_exit);