drivers/misc/thinkpad_acpi.h - kernel/msm-5.4 - Gitiles

 /*
  *  thinkpad_acpi.h - ThinkPad ACPI Extras
  *
  *
  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
  *  Copyright (C) 2006-2007 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
  *
  *  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., 51 Franklin Street, Fifth Floor, Boston, MA
  *  02110-1301, USA.
  */

 #ifndef __THINKPAD_ACPI_H__
 #define __THINKPAD_ACPI_H__

 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/types.h>
 #include <linux/string.h>
 #include <linux/list.h>
 #include <linux/mutex.h>

 #include <linux/proc_fs.h>
 #include <linux/sysfs.h>
 #include <linux/backlight.h>
 #include <linux/fb.h>
 #include <linux/platform_device.h>
 #include <linux/hwmon.h>
 #include <linux/hwmon-sysfs.h>
 #include <asm/uaccess.h>

 #include <linux/dmi.h>
 #include <linux/jiffies.h>
 #include <linux/workqueue.h>

 #include <acpi/acpi_drivers.h>
 #include <acpi/acnamesp.h>


 /****************************************************************************
  * Main driver
  */

 #define IBM_NAME "thinkpad"
 #define IBM_DESC "ThinkPad ACPI Extras"
 #define IBM_FILE "thinkpad_acpi"
 #define IBM_URL "http://ibm-acpi.sf.net/"
 #define IBM_MAIL "ibm-acpi-devel@lists.sourceforge.net"

 #define IBM_PROC_DIR "ibm"
 #define IBM_ACPI_EVENT_PREFIX "ibm"
 #define IBM_DRVR_NAME IBM_FILE

 #define IBM_LOG IBM_FILE ": "
 #define IBM_ERR	   KERN_ERR    IBM_LOG
 #define IBM_NOTICE KERN_NOTICE IBM_LOG
 #define IBM_INFO   KERN_INFO   IBM_LOG
 #define IBM_DEBUG  KERN_DEBUG  IBM_LOG

 #define IBM_MAX_ACPI_ARGS 3

 /* ThinkPad CMOS commands */
 #define TP_CMOS_VOLUME_DOWN	0
 #define TP_CMOS_VOLUME_UP	1
 #define TP_CMOS_VOLUME_MUTE	2
 #define TP_CMOS_BRIGHTNESS_UP	4
 #define TP_CMOS_BRIGHTNESS_DOWN	5

 #define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
 #define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 #define strlencmp(a,b) (strncmp((a), (b), strlen(b)))

 /* Debugging */
 #define TPACPI_DBG_ALL		0xffff
 #define TPACPI_DBG_ALL		0xffff
 #define TPACPI_DBG_INIT		0x0001
 #define TPACPI_DBG_EXIT		0x0002
 #define dbg_printk(a_dbg_level, format, arg...) \
 	do { if (dbg_level & a_dbg_level) \
 		printk(IBM_DEBUG "%s: " format, __func__ , ## arg); } while (0)
 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 #define vdbg_printk(a_dbg_level, format, arg...) \
 	dbg_printk(a_dbg_level, format, ## arg)
 static const char *str_supported(int is_supported);
 #else
 #define vdbg_printk(a_dbg_level, format, arg...)
 #endif

 /* ACPI HIDs */
 #define IBM_HKEY_HID    "IBM0068"
 #define IBM_PCI_HID     "PNP0A03"

 /* ACPI helpers */
 static int __must_check acpi_evalf(acpi_handle handle,
 		      void *res, char *method, char *fmt, ...);
 static int __must_check acpi_ec_read(int i, u8 * p);
 static int __must_check acpi_ec_write(int i, u8 v);
 static int __must_check _sta(acpi_handle handle);

 /* ACPI handles */
 static acpi_handle root_handle;			/* root namespace */
 static acpi_handle ec_handle;			/* EC */
 static acpi_handle ecrd_handle, ecwr_handle;	/* 570 EC access */
 static acpi_handle cmos_handle, hkey_handle;	/* basic thinkpad handles */

 static void drv_acpi_handle_init(char *name,
 		   acpi_handle *handle, acpi_handle parent,
 		   char **paths, int num_paths, char **path);
 #define IBM_ACPIHANDLE_INIT(object)						\
 	drv_acpi_handle_init(#object, &object##_handle, *object##_parent,	\
 		object##_paths, ARRAY_SIZE(object##_paths), &object##_path)

 /* ThinkPad ACPI helpers */
 static int issue_thinkpad_cmos_command(int cmos_cmd);

 /* procfs support */
 static struct proc_dir_entry *proc_dir;

 /* procfs helpers */
 static int dispatch_procfs_read(char *page, char **start, off_t off,
 		int count, int *eof, void *data);
 static int dispatch_procfs_write(struct file *file,
 		const char __user * userbuf,
 		unsigned long count, void *data);
 static char *next_cmd(char **cmds);

 /* sysfs support */
 struct attribute_set {
 	unsigned int members, max_members;
 	struct attribute_group group;
 };

 static struct attribute_set *create_attr_set(unsigned int max_members,
 						const char* name);
 #define destroy_attr_set(_set) \
 	kfree(_set);
 static int add_to_attr_set(struct attribute_set* s, struct attribute *attr);
 static int add_many_to_attr_set(struct attribute_set* s,
 			struct attribute **attr,
 			unsigned int count);
 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 	sysfs_create_group(_kobj, &_attr_set->group)
 static void delete_attr_set(struct attribute_set* s, struct kobject *kobj);

 static int parse_strtoul(const char *buf, unsigned long max,
 			unsigned long *value);

 /* Device model */
 static struct platform_device *tpacpi_pdev;
 static struct class_device *tpacpi_hwmon;
 static struct platform_driver tpacpi_pdriver;
 static int tpacpi_create_driver_attributes(struct device_driver *drv);
 static void tpacpi_remove_driver_attributes(struct device_driver *drv);

 /* Module */
 static int experimental;
 static u32 dbg_level;
 static int force_load;
 static char *ibm_thinkpad_ec_found;

 static char* check_dmi_for_ec(void);
 static int thinkpad_acpi_module_init(void);
 static void thinkpad_acpi_module_exit(void);


 /****************************************************************************
  * Subdrivers
  */

 struct ibm_struct;

 struct tp_acpi_drv_struct {
 	char *hid;
 	struct acpi_driver *driver;

 	void (*notify) (struct ibm_struct *, u32);
 	acpi_handle *handle;
 	u32 type;
 	struct acpi_device *device;
 };

 struct ibm_struct {
 	char *name;

 	int (*read) (char *);
 	int (*write) (char *);
 	void (*exit) (void);

 	struct list_head all_drivers;

 	struct tp_acpi_drv_struct *acpi;

 	struct {
 		u8 acpi_driver_registered:1;
 		u8 acpi_notify_installed:1;
 		u8 proc_created:1;
 		u8 init_called:1;
 		u8 experimental:1;
 	} flags;
 };

 struct ibm_init_struct {
 	char param[32];

 	int (*init) (struct ibm_init_struct *);
 	struct ibm_struct *data;
 };

 static struct {
 #ifdef CONFIG_THINKPAD_ACPI_BAY
 	u16 bay_status:1;
 	u16 bay_eject:1;
 	u16 bay_status2:1;
 	u16 bay_eject2:1;
 #endif
 	u16 bluetooth:1;
 	u16 hotkey:1;
 	u16 hotkey_mask:1;
 	u16 light:1;
 	u16 light_status:1;
 	u16 wan:1;
 	u16 fan_ctrl_status_undef:1;
 } tp_features;

 static struct list_head tpacpi_all_drivers;

 static struct ibm_init_struct ibms_init[];
 static int set_ibm_param(const char *val, struct kernel_param *kp);
 static int ibm_init(struct ibm_init_struct *iibm);
 static void ibm_exit(struct ibm_struct *ibm);


 /*
  * procfs master subdriver
  */
 static int thinkpad_acpi_driver_init(struct ibm_init_struct *iibm);
 static int thinkpad_acpi_driver_read(char *p);


 /*
  * Bay subdriver
  */

 #ifdef CONFIG_THINKPAD_ACPI_BAY
 static acpi_handle bay_handle, bay_ej_handle;
 static acpi_handle bay2_handle, bay2_ej_handle;

 static int bay_init(struct ibm_init_struct *iibm);
 static void bay_notify(struct ibm_struct *ibm, u32 event);
 static int bay_read(char *p);
 static int bay_write(char *buf);
 #endif /* CONFIG_THINKPAD_ACPI_BAY */


 /*
  * Beep subdriver
  */

 static acpi_handle beep_handle;

 static int beep_read(char *p);
 static int beep_write(char *buf);


 /*
  * Bluetooth subdriver
  */

 #define TPACPI_BLUETH_SYSFS_GROUP "bluetooth"

 enum {
 	/* ACPI GBDC/SBDC bits */
 	TP_ACPI_BLUETOOTH_HWPRESENT	= 0x01,	/* Bluetooth hw available */
 	TP_ACPI_BLUETOOTH_RADIOSSW	= 0x02,	/* Bluetooth radio enabled */
 	TP_ACPI_BLUETOOTH_UNK		= 0x04,	/* unknown function */
 };

 static int bluetooth_init(struct ibm_init_struct *iibm);
 static int bluetooth_get_radiosw(void);
 static int bluetooth_set_radiosw(int radio_on);
 static int bluetooth_read(char *p);
 static int bluetooth_write(char *buf);


 /*
  * Brightness (backlight) subdriver
  */

 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"

 static struct backlight_device *ibm_backlight_device;
 static int brightness_offset = 0x31;

 static int brightness_init(struct ibm_init_struct *iibm);
 static void brightness_exit(void);
 static int brightness_get(struct backlight_device *bd);
 static int brightness_set(int value);
 static int brightness_update_status(struct backlight_device *bd);
 static int brightness_read(char *p);
 static int brightness_write(char *buf);


 /*
  * CMOS subdriver
  */

 static int cmos_read(char *p);
 static int cmos_write(char *buf);


 /*
  * Dock subdriver
  */

 #ifdef CONFIG_THINKPAD_ACPI_DOCK
 static acpi_handle pci_handle;
 static acpi_handle dock_handle;

 static void dock_notify(struct ibm_struct *ibm, u32 event);
 static int dock_read(char *p);
 static int dock_write(char *buf);
 #endif /* CONFIG_THINKPAD_ACPI_DOCK */


 /*
  * EC dump subdriver
  */

 static int ecdump_read(char *p) ;
 static int ecdump_write(char *buf);


 /*
  * Fan subdriver
  */

 enum {					/* Fan control constants */
 	fan_status_offset = 0x2f,	/* EC register 0x2f */
 	fan_rpm_offset = 0x84,		/* EC register 0x84: LSB, 0x85 MSB (RPM)
 					 * 0x84 must be read before 0x85 */

 	TP_EC_FAN_FULLSPEED = 0x40,	/* EC fan mode: full speed */
 	TP_EC_FAN_AUTO	    = 0x80,	/* EC fan mode: auto fan control */

 	TPACPI_FAN_LAST_LEVEL = 0x100,	/* Use cached last-seen fan level */
 };

 enum fan_status_access_mode {
 	TPACPI_FAN_NONE = 0,		/* No fan status or control */
 	TPACPI_FAN_RD_ACPI_GFAN,	/* Use ACPI GFAN */
 	TPACPI_FAN_RD_TPEC,		/* Use ACPI EC regs 0x2f, 0x84-0x85 */
 };

 enum fan_control_access_mode {
 	TPACPI_FAN_WR_NONE = 0,		/* No fan control */
 	TPACPI_FAN_WR_ACPI_SFAN,	/* Use ACPI SFAN */
 	TPACPI_FAN_WR_TPEC,		/* Use ACPI EC reg 0x2f */
 	TPACPI_FAN_WR_ACPI_FANS,	/* Use ACPI FANS and EC reg 0x2f */
 };

 enum fan_control_commands {
 	TPACPI_FAN_CMD_SPEED 	= 0x0001,	/* speed command */
 	TPACPI_FAN_CMD_LEVEL 	= 0x0002,	/* level command  */
 	TPACPI_FAN_CMD_ENABLE	= 0x0004,	/* enable/disable cmd,
 						 * and also watchdog cmd */
 };

 static int fan_control_allowed;

 static enum fan_status_access_mode fan_status_access_mode;
 static enum fan_control_access_mode fan_control_access_mode;
 static enum fan_control_commands fan_control_commands;
 static u8 fan_control_initial_status;
 static u8 fan_control_desired_level;
 static int fan_watchdog_maxinterval;

 static struct mutex fan_mutex;

 static acpi_handle fans_handle, gfan_handle, sfan_handle;

 static int fan_init(struct ibm_init_struct *iibm);
 static void fan_exit(void);
 static int fan_get_status(u8 *status);
 static int fan_get_status_safe(u8 *status);
 static int fan_get_speed(unsigned int *speed);
 static void fan_update_desired_level(u8 status);
 static void fan_watchdog_fire(struct work_struct *ignored);
 static void fan_watchdog_reset(void);
 static int fan_set_level(int level);
 static int fan_set_level_safe(int level);
 static int fan_set_enable(void);
 static int fan_set_disable(void);
 static int fan_set_speed(int speed);
 static int fan_read(char *p);
 static int fan_write(char *buf);
 static int fan_write_cmd_level(const char *cmd, int *rc);
 static int fan_write_cmd_enable(const char *cmd, int *rc);
 static int fan_write_cmd_disable(const char *cmd, int *rc);
 static int fan_write_cmd_speed(const char *cmd, int *rc);
 static int fan_write_cmd_watchdog(const char *cmd, int *rc);


 /*
  * Hotkey subdriver
  */

 #define TPACPI_HOTKEY_SYSFS_GROUP "hotkey"

 static int hotkey_orig_status;
 static int hotkey_orig_mask;

 static struct mutex hotkey_mutex;

 static int hotkey_init(struct ibm_init_struct *iibm);
 static void hotkey_exit(void);
 static int hotkey_get(int *status, int *mask);
 static int hotkey_set(int status, int mask);
 static void hotkey_notify(struct ibm_struct *ibm, u32 event);
 static int hotkey_read(char *p);
 static int hotkey_write(char *buf);


 /*
  * LED subdriver
  */

 enum led_access_mode {
 	TPACPI_LED_NONE = 0,
 	TPACPI_LED_570,	/* 570 */
 	TPACPI_LED_OLD,	/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
 	TPACPI_LED_NEW,	/* all others */
 };

 enum {	/* For TPACPI_LED_OLD */
 	TPACPI_LED_EC_HLCL = 0x0c,	/* EC reg to get led to power on */
 	TPACPI_LED_EC_HLBL = 0x0d,	/* EC reg to blink a lit led */
 	TPACPI_LED_EC_HLMS = 0x0e,	/* EC reg to select led to command */
 };

 static enum led_access_mode led_supported;
 static acpi_handle led_handle;

 static int led_init(struct ibm_init_struct *iibm);
 static int led_read(char *p);
 static int led_write(char *buf);

 /*
  * Light (thinklight) subdriver
  */

 static acpi_handle lght_handle, ledb_handle;

 static int light_init(struct ibm_init_struct *iibm);
 static int light_read(char *p);
 static int light_write(char *buf);


 /*
  * Thermal subdriver
  */

 enum thermal_access_mode {
 	TPACPI_THERMAL_NONE = 0,	/* No thermal support */
 	TPACPI_THERMAL_ACPI_TMP07,	/* Use ACPI TMP0-7 */
 	TPACPI_THERMAL_ACPI_UPDT,	/* Use ACPI TMP0-7 with UPDT */
 	TPACPI_THERMAL_TPEC_8,		/* Use ACPI EC regs, 8 sensors */
 	TPACPI_THERMAL_TPEC_16,		/* Use ACPI EC regs, 16 sensors */
 };

 enum { /* TPACPI_THERMAL_TPEC_* */
 	TP_EC_THERMAL_TMP0 = 0x78,	/* ACPI EC regs TMP 0..7 */
 	TP_EC_THERMAL_TMP8 = 0xC0,	/* ACPI EC regs TMP 8..15 */
 	TP_EC_THERMAL_TMP_NA = -128,	/* ACPI EC sensor not available */
 };

 #define TPACPI_MAX_THERMAL_SENSORS 16	/* Max thermal sensors supported */
 struct ibm_thermal_sensors_struct {
 	s32 temp[TPACPI_MAX_THERMAL_SENSORS];
 };

 static enum thermal_access_mode thermal_read_mode;

 static int thermal_init(struct ibm_init_struct *iibm);
 static int thermal_get_sensor(int idx, s32 *value);
 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s);
 static int thermal_read(char *p);


 /*
  * Video subdriver
  */

 enum video_access_mode {
 	TPACPI_VIDEO_NONE = 0,
 	TPACPI_VIDEO_570,	/* 570 */
 	TPACPI_VIDEO_770,	/* 600e/x, 770e, 770x */
 	TPACPI_VIDEO_NEW,	/* all others */
 };

 enum {	/* video status flags, based on VIDEO_570 */
 	TP_ACPI_VIDEO_S_LCD = 0x01,	/* LCD output enabled */
 	TP_ACPI_VIDEO_S_CRT = 0x02,	/* CRT output enabled */
 	TP_ACPI_VIDEO_S_DVI = 0x08,	/* DVI output enabled */
 };

 enum {  /* TPACPI_VIDEO_570 constants */
 	TP_ACPI_VIDEO_570_PHSCMD = 0x87,	/* unknown magic constant :( */
 	TP_ACPI_VIDEO_570_PHSMASK = 0x03,	/* PHS bits that map to
 						 * video_status_flags */
 	TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,	/* unknown magic constant :( */
 	TP_ACPI_VIDEO_570_PHS2SET = 0x80,	/* unknown magic constant :( */
 };

 static enum video_access_mode video_supported;
 static int video_orig_autosw;
 static acpi_handle vid_handle, vid2_handle;

 static int video_init(struct ibm_init_struct *iibm);
 static void video_exit(void);
 static int video_outputsw_get(void);
 static int video_outputsw_set(int status);
 static int video_autosw_get(void);
 static int video_autosw_set(int enable);
 static int video_outputsw_cycle(void);
 static int video_expand_toggle(void);
 static int video_read(char *p);
 static int video_write(char *buf);


 /*
  * Volume subdriver
  */

 static int volume_offset = 0x30;

 static int volume_read(char *p);
 static int volume_write(char *buf);


 /*
  * Wan subdriver
  */

 #define TPACPI_WAN_SYSFS_GROUP "wwan"

 enum {
 	/* ACPI GWAN/SWAN bits */
 	TP_ACPI_WANCARD_HWPRESENT	= 0x01,	/* Wan hw available */
 	TP_ACPI_WANCARD_RADIOSSW	= 0x02,	/* Wan radio enabled */
 	TP_ACPI_WANCARD_UNK		= 0x04,	/* unknown function */
 };

 static int wan_init(struct ibm_init_struct *iibm);
 static int wan_get_radiosw(void);
 static int wan_set_radiosw(int radio_on);
 static int wan_read(char *p);
 static int wan_write(char *buf);


 #endif /* __THINKPAD_ACPI_H */
	/*
	* thinkpad_acpi.h - ThinkPad ACPI Extras
	*
	*
	* Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
	* Copyright (C) 2006-2007 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
	*
	* 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., 51 Franklin Street, Fifth Floor, Boston, MA
	* 02110-1301, USA.
	*/

	#ifndef __THINKPAD_ACPI_H__
	#define __THINKPAD_ACPI_H__

	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/types.h>
	#include <linux/string.h>
	#include <linux/list.h>
	#include <linux/mutex.h>

	#include <linux/proc_fs.h>
	#include <linux/sysfs.h>
	#include <linux/backlight.h>
	#include <linux/fb.h>
	#include <linux/platform_device.h>
	#include <linux/hwmon.h>
	#include <linux/hwmon-sysfs.h>
	#include <asm/uaccess.h>

	#include <linux/dmi.h>
	#include <linux/jiffies.h>
	#include <linux/workqueue.h>

	#include <acpi/acpi_drivers.h>
	#include <acpi/acnamesp.h>


	/****************************************************************************
	* Main driver
	*/

	#define IBM_NAME "thinkpad"
	#define IBM_DESC "ThinkPad ACPI Extras"
	#define IBM_FILE "thinkpad_acpi"
	#define IBM_URL "http://ibm-acpi.sf.net/"
	#define IBM_MAIL "ibm-acpi-devel@lists.sourceforge.net"

	#define IBM_PROC_DIR "ibm"
	#define IBM_ACPI_EVENT_PREFIX "ibm"
	#define IBM_DRVR_NAME IBM_FILE

	#define IBM_LOG IBM_FILE ": "
	#define IBM_ERR KERN_ERR IBM_LOG
	#define IBM_NOTICE KERN_NOTICE IBM_LOG
	#define IBM_INFO KERN_INFO IBM_LOG
	#define IBM_DEBUG KERN_DEBUG IBM_LOG

	#define IBM_MAX_ACPI_ARGS 3

	/* ThinkPad CMOS commands */
	#define TP_CMOS_VOLUME_DOWN 0
	#define TP_CMOS_VOLUME_UP 1
	#define TP_CMOS_VOLUME_MUTE 2
	#define TP_CMOS_BRIGHTNESS_UP 4
	#define TP_CMOS_BRIGHTNESS_DOWN 5

	#define onoff(status,bit) ((status) & (1 << (bit)) ? "on" : "off")
	#define enabled(status,bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
	#define strlencmp(a,b) (strncmp((a), (b), strlen(b)))

	/* Debugging */
	#define TPACPI_DBG_ALL 0xffff
	#define TPACPI_DBG_ALL 0xffff
	#define TPACPI_DBG_INIT 0x0001
	#define TPACPI_DBG_EXIT 0x0002
	#define dbg_printk(a_dbg_level, format, arg...) \
	do { if (dbg_level & a_dbg_level) \
	printk(IBM_DEBUG "%s: " format, __func__ , ## arg); } while (0)
	#ifdef CONFIG_THINKPAD_ACPI_DEBUG
	#define vdbg_printk(a_dbg_level, format, arg...) \
	dbg_printk(a_dbg_level, format, ## arg)
	static const char *str_supported(int is_supported);
	#else
	#define vdbg_printk(a_dbg_level, format, arg...)
	#endif

	/* ACPI HIDs */
	#define IBM_HKEY_HID "IBM0068"
	#define IBM_PCI_HID "PNP0A03"

	/* ACPI helpers */
	static int __must_check acpi_evalf(acpi_handle handle,
	void res, char method, char *fmt, ...);
	static int __must_check acpi_ec_read(int i, u8 * p);
	static int __must_check acpi_ec_write(int i, u8 v);
	static int __must_check _sta(acpi_handle handle);

	/* ACPI handles */
	static acpi_handle root_handle; /* root namespace */
	static acpi_handle ec_handle; /* EC */
	static acpi_handle ecrd_handle, ecwr_handle; /* 570 EC access */
	static acpi_handle cmos_handle, hkey_handle; /* basic thinkpad handles */

	static void drv_acpi_handle_init(char *name,
	acpi_handle *handle, acpi_handle parent,
	char paths, int num_paths, char path);
	#define IBM_ACPIHANDLE_INIT(object) \
	drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
	object##_paths, ARRAY_SIZE(object##_paths), &object##_path)

	/* ThinkPad ACPI helpers */
	static int issue_thinkpad_cmos_command(int cmos_cmd);

	/* procfs support */
	static struct proc_dir_entry *proc_dir;

	/* procfs helpers */
	static int dispatch_procfs_read(char page, char *start, off_t off,
	int count, int eof, void data);
	static int dispatch_procfs_write(struct file *file,
	const char __user * userbuf,
	unsigned long count, void *data);
	static char next_cmd(char *cmds);

	/* sysfs support */
	struct attribute_set {
	unsigned int members, max_members;
	struct attribute_group group;
	};

	static struct attribute_set *create_attr_set(unsigned int max_members,
	const char* name);
	#define destroy_attr_set(_set) \
	kfree(_set);
	static int add_to_attr_set(struct attribute_set* s, struct attribute *attr);
	static int add_many_to_attr_set(struct attribute_set* s,
	struct attribute **attr,
	unsigned int count);
	#define register_attr_set_with_sysfs(_attr_set, _kobj) \
	sysfs_create_group(_kobj, &_attr_set->group)
	static void delete_attr_set(struct attribute_set* s, struct kobject *kobj);

	static int parse_strtoul(const char *buf, unsigned long max,
	unsigned long *value);

	/* Device model */
	static struct platform_device *tpacpi_pdev;
	static struct class_device *tpacpi_hwmon;
	static struct platform_driver tpacpi_pdriver;
	static int tpacpi_create_driver_attributes(struct device_driver *drv);
	static void tpacpi_remove_driver_attributes(struct device_driver *drv);

	/* Module */
	static int experimental;
	static u32 dbg_level;
	static int force_load;
	static char *ibm_thinkpad_ec_found;

	static char* check_dmi_for_ec(void);
	static int thinkpad_acpi_module_init(void);
	static void thinkpad_acpi_module_exit(void);


	/****************************************************************************
	* Subdrivers
	*/

	struct ibm_struct;

	struct tp_acpi_drv_struct {
	char *hid;
	struct acpi_driver *driver;

	void (notify) (struct ibm_struct , u32);
	acpi_handle *handle;
	u32 type;
	struct acpi_device *device;
	};

	struct ibm_struct {
	char *name;

	int (read) (char );
	int (write) (char );
	void (*exit) (void);

	struct list_head all_drivers;

	struct tp_acpi_drv_struct *acpi;

	struct {
	u8 acpi_driver_registered:1;
	u8 acpi_notify_installed:1;
	u8 proc_created:1;
	u8 init_called:1;
	u8 experimental:1;
	} flags;
	};

	struct ibm_init_struct {
	char param[32];

	int (init) (struct ibm_init_struct );
	struct ibm_struct *data;
	};

	static struct {
	#ifdef CONFIG_THINKPAD_ACPI_BAY
	u16 bay_status:1;
	u16 bay_eject:1;
	u16 bay_status2:1;
	u16 bay_eject2:1;
	#endif
	u16 bluetooth:1;
	u16 hotkey:1;
	u16 hotkey_mask:1;
	u16 light:1;
	u16 light_status:1;
	u16 wan:1;
	u16 fan_ctrl_status_undef:1;
	} tp_features;

	static struct list_head tpacpi_all_drivers;

	static struct ibm_init_struct ibms_init[];
	static int set_ibm_param(const char val, struct kernel_param kp);
	static int ibm_init(struct ibm_init_struct *iibm);
	static void ibm_exit(struct ibm_struct *ibm);


	/*
	* procfs master subdriver
	*/
	static int thinkpad_acpi_driver_init(struct ibm_init_struct *iibm);
	static int thinkpad_acpi_driver_read(char *p);


	/*
	* Bay subdriver
	*/

	#ifdef CONFIG_THINKPAD_ACPI_BAY
	static acpi_handle bay_handle, bay_ej_handle;
	static acpi_handle bay2_handle, bay2_ej_handle;

	static int bay_init(struct ibm_init_struct *iibm);
	static void bay_notify(struct ibm_struct *ibm, u32 event);
	static int bay_read(char *p);
	static int bay_write(char *buf);
	#endif /* CONFIG_THINKPAD_ACPI_BAY */


	/*
	* Beep subdriver
	*/

	static acpi_handle beep_handle;

	static int beep_read(char *p);
	static int beep_write(char *buf);


	/*
	* Bluetooth subdriver
	*/

	#define TPACPI_BLUETH_SYSFS_GROUP "bluetooth"

	enum {
	/* ACPI GBDC/SBDC bits */
	TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */
	TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */
	TP_ACPI_BLUETOOTH_UNK = 0x04, /* unknown function */
	};

	static int bluetooth_init(struct ibm_init_struct *iibm);
	static int bluetooth_get_radiosw(void);
	static int bluetooth_set_radiosw(int radio_on);
	static int bluetooth_read(char *p);
	static int bluetooth_write(char *buf);


	/*
	* Brightness (backlight) subdriver
	*/

	#define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"

	static struct backlight_device *ibm_backlight_device;
	static int brightness_offset = 0x31;

	static int brightness_init(struct ibm_init_struct *iibm);
	static void brightness_exit(void);
	static int brightness_get(struct backlight_device *bd);
	static int brightness_set(int value);
	static int brightness_update_status(struct backlight_device *bd);
	static int brightness_read(char *p);
	static int brightness_write(char *buf);


	/*
	* CMOS subdriver
	*/

	static int cmos_read(char *p);
	static int cmos_write(char *buf);


	/*
	* Dock subdriver
	*/

	#ifdef CONFIG_THINKPAD_ACPI_DOCK
	static acpi_handle pci_handle;
	static acpi_handle dock_handle;

	static void dock_notify(struct ibm_struct *ibm, u32 event);
	static int dock_read(char *p);
	static int dock_write(char *buf);
	#endif /* CONFIG_THINKPAD_ACPI_DOCK */


	/*
	* EC dump subdriver
	*/

	static int ecdump_read(char *p) ;
	static int ecdump_write(char *buf);


	/*
	* Fan subdriver
	*/

	enum { /* Fan control constants */
	fan_status_offset = 0x2f, /* EC register 0x2f */
	fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM)
	* 0x84 must be read before 0x85 */

	TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */
	TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */

	TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */
	};

	enum fan_status_access_mode {
	TPACPI_FAN_NONE = 0, /* No fan status or control */
	TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */
	TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */
	};

	enum fan_control_access_mode {
	TPACPI_FAN_WR_NONE = 0, /* No fan control */
	TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */
	TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */
	TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */
	};

	enum fan_control_commands {
	TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */
	TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */
	TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd,
	* and also watchdog cmd */
	};

	static int fan_control_allowed;

	static enum fan_status_access_mode fan_status_access_mode;
	static enum fan_control_access_mode fan_control_access_mode;
	static enum fan_control_commands fan_control_commands;
	static u8 fan_control_initial_status;
	static u8 fan_control_desired_level;
	static int fan_watchdog_maxinterval;

	static struct mutex fan_mutex;

	static acpi_handle fans_handle, gfan_handle, sfan_handle;

	static int fan_init(struct ibm_init_struct *iibm);
	static void fan_exit(void);
	static int fan_get_status(u8 *status);
	static int fan_get_status_safe(u8 *status);
	static int fan_get_speed(unsigned int *speed);
	static void fan_update_desired_level(u8 status);
	static void fan_watchdog_fire(struct work_struct *ignored);
	static void fan_watchdog_reset(void);
	static int fan_set_level(int level);
	static int fan_set_level_safe(int level);
	static int fan_set_enable(void);
	static int fan_set_disable(void);
	static int fan_set_speed(int speed);
	static int fan_read(char *p);
	static int fan_write(char *buf);
	static int fan_write_cmd_level(const char cmd, int rc);
	static int fan_write_cmd_enable(const char cmd, int rc);
	static int fan_write_cmd_disable(const char cmd, int rc);
	static int fan_write_cmd_speed(const char cmd, int rc);
	static int fan_write_cmd_watchdog(const char cmd, int rc);


	/*
	* Hotkey subdriver
	*/

	#define TPACPI_HOTKEY_SYSFS_GROUP "hotkey"

	static int hotkey_orig_status;
	static int hotkey_orig_mask;

	static struct mutex hotkey_mutex;

	static int hotkey_init(struct ibm_init_struct *iibm);
	static void hotkey_exit(void);
	static int hotkey_get(int status, int mask);
	static int hotkey_set(int status, int mask);
	static void hotkey_notify(struct ibm_struct *ibm, u32 event);
	static int hotkey_read(char *p);
	static int hotkey_write(char *buf);


	/*
	* LED subdriver
	*/

	enum led_access_mode {
	TPACPI_LED_NONE = 0,
	TPACPI_LED_570, /* 570 */
	TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
	TPACPI_LED_NEW, /* all others */
	};

	enum { /* For TPACPI_LED_OLD */
	TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */
	TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */
	TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */
	};

	static enum led_access_mode led_supported;
	static acpi_handle led_handle;

	static int led_init(struct ibm_init_struct *iibm);
	static int led_read(char *p);
	static int led_write(char *buf);

	/*
	* Light (thinklight) subdriver
	*/

	static acpi_handle lght_handle, ledb_handle;

	static int light_init(struct ibm_init_struct *iibm);
	static int light_read(char *p);
	static int light_write(char *buf);


	/*
	* Thermal subdriver
	*/

	enum thermal_access_mode {
	TPACPI_THERMAL_NONE = 0, /* No thermal support */
	TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */
	TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */
	TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */
	TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */
	};

	enum { /* TPACPI_THERMAL_TPEC_* */
	TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */
	TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */
	TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */
	};

	#define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */
	struct ibm_thermal_sensors_struct {
	s32 temp[TPACPI_MAX_THERMAL_SENSORS];
	};

	static enum thermal_access_mode thermal_read_mode;

	static int thermal_init(struct ibm_init_struct *iibm);
	static int thermal_get_sensor(int idx, s32 *value);
	static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s);
	static int thermal_read(char *p);


	/*
	* Video subdriver
	*/

	enum video_access_mode {
	TPACPI_VIDEO_NONE = 0,
	TPACPI_VIDEO_570, /* 570 */
	TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */
	TPACPI_VIDEO_NEW, /* all others */
	};

	enum { /* video status flags, based on VIDEO_570 */
	TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */
	TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */
	TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */
	};

	enum { /* TPACPI_VIDEO_570 constants */
	TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */
	TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to
	* video_status_flags */
	TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */
	TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */
	};

	static enum video_access_mode video_supported;
	static int video_orig_autosw;
	static acpi_handle vid_handle, vid2_handle;

	static int video_init(struct ibm_init_struct *iibm);
	static void video_exit(void);
	static int video_outputsw_get(void);
	static int video_outputsw_set(int status);
	static int video_autosw_get(void);
	static int video_autosw_set(int enable);
	static int video_outputsw_cycle(void);
	static int video_expand_toggle(void);
	static int video_read(char *p);
	static int video_write(char *buf);


	/*
	* Volume subdriver
	*/

	static int volume_offset = 0x30;

	static int volume_read(char *p);
	static int volume_write(char *buf);


	/*
	* Wan subdriver
	*/

	#define TPACPI_WAN_SYSFS_GROUP "wwan"

	enum {
	/* ACPI GWAN/SWAN bits */
	TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */
	TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */
	TP_ACPI_WANCARD_UNK = 0x04, /* unknown function */
	};

	static int wan_init(struct ibm_init_struct *iibm);
	static int wan_get_radiosw(void);
	static int wan_set_radiosw(int radio_on);
	static int wan_read(char *p);
	static int wan_write(char *buf);


	#endif /* __THINKPAD_ACPI_H */