path: root/drivers/misc/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/nvram.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 <linux/input.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>

#include <linux/pci_ids.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

/* ThinkPad CMOS NVRAM constants */
#define TP_NVRAM_ADDR_BRIGHTNESS       0x5e
#define TP_NVRAM_MASK_LEVEL_BRIGHTNESS 0x07
#define TP_NVRAM_POS_LEVEL_BRIGHTNESS 0

#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

/* Input IDs */
#define TPACPI_HKEY_INPUT_VENDOR	PCI_VENDOR_ID_IBM
#define TPACPI_HKEY_INPUT_PRODUCT	0x5054 /* "TP" */
#define TPACPI_HKEY_INPUT_VERSION	0x4101

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

/* 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 struct input_dev *tpacpi_inputdev;
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 unsigned int hotkey_report_mode;

static int thinkpad_acpi_module_init(void);
static void thinkpad_acpi_module_exit(void);


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

struct ibm_struct;

struct tp_acpi_drv_struct {
	const struct acpi_device_id *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);
	void (*resume) (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 hotkey_wlsw:1;
	u16 light:1;
	u16 light_status:1;
	u16 wan:1;
	u16 fan_ctrl_status_undef:1;
	u16 input_device_registered:1;
	u16 platform_drv_registered:1;
	u16 platform_drv_attrs_registered:1;
} tp_features;

struct thinkpad_id_data {
	unsigned int vendor;	/* ThinkPad vendor:
				 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */

	char *bios_version_str;	/* Something like 1ZET51WW (1.03z) */
	char *ec_version_str;	/* Something like 1ZHT51WW-1.04a */

	u16 bios_model;		/* Big Endian, TP-1Y = 0x5931, 0 = unknown */
	u16 ec_model;

	char *model_str;
};

static struct thinkpad_id_data thinkpad_id;

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);