path: root/drivers/platform/x86/eeepc-laptop.c

/*
 *  eeepc-laptop.c - Asus Eee PC extras
 *
 *  Based on asus_acpi.c as patched for the Eee PC by Asus:
 *  ftp://ftp.asus.com/pub/ASUS/EeePC/701/ASUS_ACPI_071126.rar
 *  Based on eee.c from eeepc-linux
 *
 *  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.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/backlight.h>
#include <linux/fb.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/slab.h>
#include <acpi/acpi_drivers.h>
#include <acpi/acpi_bus.h>
#include <linux/uaccess.h>
#include <linux/input.h>
#include <linux/input/sparse-keymap.h>
#include <linux/rfkill.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
#include <linux/leds.h>
#include <linux/dmi.h>

#define EEEPC_LAPTOP_VERSION	"0.1"
#define EEEPC_LAPTOP_NAME	"Eee PC Hotkey Driver"
#define EEEPC_LAPTOP_FILE	"eeepc"

#define EEEPC_ACPI_CLASS	"hotkey"
#define EEEPC_ACPI_DEVICE_NAME	"Hotkey"
#define EEEPC_ACPI_HID		"ASUS010"

MODULE_AUTHOR("Corentin Chary, Eric Cooper");
MODULE_DESCRIPTION(EEEPC_LAPTOP_NAME);
MODULE_LICENSE("GPL");

static bool hotplug_disabled;

module_param(hotplug_disabled, bool, 0444);
MODULE_PARM_DESC(hotplug_disabled,
		 "Disable hotplug for wireless device. "
		 "If your laptop need that, please report to "
		 "acpi4asus-user@lists.sourceforge.net.");

/*
 * Definitions for Asus EeePC
 */
#define NOTIFY_BRN_MIN	0x20
#define NOTIFY_BRN_MAX	0x2f

enum {
	DISABLE_ASL_WLAN = 0x0001,
	DISABLE_ASL_BLUETOOTH = 0x0002,
	DISABLE_ASL_IRDA = 0x0004,
	DISABLE_ASL_CAMERA = 0x0008,
	DISABLE_ASL_TV = 0x0010,
	DISABLE_ASL_GPS = 0x0020,
	DISABLE_ASL_DISPLAYSWITCH = 0x0040,
	DISABLE_ASL_MODEM = 0x0080,
	DISABLE_ASL_CARDREADER = 0x0100,
	DISABLE_ASL_3G = 0x0200,
	DISABLE_ASL_WIMAX = 0x0400,
	DISABLE_ASL_HWCF = 0x0800
};

enum {
	CM_ASL_WLAN = 0,
	CM_ASL_BLUETOOTH,
	CM_ASL_IRDA,
	CM_ASL_1394,
	CM_ASL_CAMERA,
	CM_ASL_TV,
	CM_ASL_GPS,
	CM_ASL_DVDROM,
	CM_ASL_DISPLAYSWITCH,
	CM_ASL_PANELBRIGHT,
	CM_ASL_BIOSFLASH,
	CM_ASL_ACPIFLASH,
	CM_ASL_CPUFV,
	CM_ASL_CPUTEMPERATURE,
	CM_ASL_FANCPU,
	CM_ASL_FANCHASSIS,
	CM_ASL_USBPORT1,
	CM_ASL_USBPORT2,
	CM_ASL_USBPORT3,
	CM_ASL_MODEM,
	CM_ASL_CARDREADER,
	CM_ASL_3G,
	CM_ASL_WIMAX,
	CM_ASL_HWCF,
	CM_ASL_LID,
	CM_ASL_TYPE,
	CM_ASL_PANELPOWER,	/*P901*/
	CM_ASL_TPD
};

static const char *cm_getv[] = {
	"WLDG", "BTHG", NULL, NULL,
	"CAMG", NULL, NULL, NULL,
	NULL, "PBLG", NULL, NULL,
	"CFVG", NULL, NULL, NULL,
	"USBG", NULL, NULL, "MODG",
	"CRDG", "M3GG", "WIMG", "HWCF",
	"LIDG",	"TYPE", "PBPG",	"TPDG"
};

static const char *cm_setv[] = {
	"WLDS", "BTHS", NULL, NULL,
	"CAMS", NULL, NULL, NULL,
	"SDSP", "PBLS", "HDPS", NULL,
	"CFVS", NULL, NULL, NULL,
	"USBG", NULL, NULL, "MODS",
	"CRDS", "M3GS", "WIMS", NULL,
	NULL, NULL, "PBPS", "TPDS"
};

static const struct key_entry eeepc_keymap[] = {
	{ KE_KEY, 0x10, { KEY_WLAN } },
	{ KE_KEY, 0x11, { KEY_WLAN } },
	{ KE_KEY, 0x12, { KEY_PROG1 } },
	{ KE_KEY, 0x13, { KEY_MUTE } },
	{ KE_KEY, 0x14, { KEY_VOLUMEDOWN } },
	{ KE_KEY, 0x15, { KEY_VOLUMEUP } },
	{ KE_KEY, 0x16, { KEY_DISPLAY_OFF } },
	{ KE_KEY, 0x1a, { KEY_COFFEE } },
	{ KE_KEY, 0x1b, { KEY_ZOOM } },
	{ KE_KEY, 0x1c, { KEY_PROG2 } },
	{ KE_KEY, 0x1d, { KEY_PROG3 } },
	{ KE_KEY, NOTIFY_BRN_MIN, { KEY_BRIGHTNESSDOWN } },
	{ KE_KEY, NOTIFY_BRN_MAX, { KEY_BRIGHTNESSUP } },
	{ KE_KEY, 0x30, { KEY_SWITCHVIDEOMODE } },
	{ KE_KEY, 0x31, { KEY_SWITCHVIDEOMODE } },
	{ KE_KEY, 0x32, { KEY_SWITCHVIDEOMODE } },
	{ KE_KEY, 0x37, { KEY_F13 } }, /* Disable Touchpad */
	{ KE_KEY, 0x38, { KEY_F14 } },
	{ KE_END, 0 },
};

/*
 * This is the main structure, we can use it to store useful information
 */
struct eeepc_laptop {
	acpi_handle handle;		/* the handle of the acpi device */
	u32 cm_supported;		/* the control methods supported
					   by this BIOS */
	bool cpufv_disabled;
	bool hotplug_disabled;
	u16 event_count[128];		/* count for each event */

	struct platform_device *platform_device;
	struct acpi_device *device;		/* the device we are in */
	struct device *hwmon_device;
	struct backlight_device *backlight_device;

	struct input_dev *inputdev;

	struct rfkill *wlan_rfkill;
	struct rfkill *bluetooth_rfkill;
	struct rfkill *wwan3g_rfkill;
	struct rfkill *wimax_rfkill;

	struct hotplug_slot *hotplug_slot;
	struct mutex hotplug_lock;

	struct led_classdev tpd_led;
	int tpd_led_wk;
	struct workqueue_struct *led_workqueue;
	struct work_struct tpd_led_work;
};

/*
 * ACPI Helpers
 */
static int write_acpi_int(acpi_handle handle, const char *method, int val)
{
	struct acpi_object_list params;
	union acpi_object in_obj;
	acpi_status status;

	params.count = 1;
	params.pointer = &in_obj;
	in_obj.type = ACPI_TYPE_INTEGER;
	in_obj.integer.value = val;

	status = acpi_evaluate_object(handle, (char *)method, &params, NULL);
	return (status == AE_OK ? 0 : -1);
}

static int read_acpi_int(acpi_handle handle, const char *method, int *val)
{
	acpi_status status;
	unsigned long long result;

	status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
	if (ACPI_FAILURE(status)) {
		*val = -1;
		return -1;
	} else {
		*val = result;
		return 0;
	}
}

static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value)
{
	const char *method = cm_setv[cm];

	if (method == NULL)
		return -ENODEV;
	if ((eeepc->cm_supported & (0x1 << cm)) == 0)
		return -ENODEV;

	if (write_acpi_int(eeepc->handle, method, value))
		pr_warn("Error writing %s\n", method);
	return 0;
}

static int get_