/*
* asus-laptop.c - Asus Laptop Support
*
*
* Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor
* Copyright (C) 2006 Corentin Chary
*
* 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
*
*
* The development page for this driver is located at
* http://sourceforge.net/projects/acpi4asus/
*
* Credits:
* Pontus Fuchs - Helper functions, cleanup
* Johann Wiesner - Small compile fixes
* John Belmonte - ACPI code for Toshiba laptop was a good starting point.
* Eric Burghard - LED display support for W1N
* Josh Green - Light Sens support
* Thomas Tuttle - His first patch for led support was very helpfull
*
*/
#include <linux/autoconf.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/err.h>
#include <linux/proc_fs.h>
#include <linux/backlight.h>
#include <linux/fb.h>
#include <linux/leds.h>
#include <linux/platform_device.h>
#include <acpi/acpi_drivers.h>
#include <acpi/acpi_bus.h>
#include <asm/uaccess.h>
#define ASUS_LAPTOP_VERSION "0.40"
#define ASUS_HOTK_NAME "Asus Laptop Support"
#define ASUS_HOTK_CLASS "hotkey"
#define ASUS_HOTK_DEVICE_NAME "Hotkey"
#define ASUS_HOTK_HID "ATK0100"
#define ASUS_HOTK_FILE "asus-laptop"
#define ASUS_HOTK_PREFIX "\\_SB.ATKD."
/*
* Some events we use, same for all Asus
*/
#define ATKD_BR_UP 0x10
#define ATKD_BR_DOWN 0x20
#define ATKD_LCD_ON 0x33
#define ATKD_LCD_OFF 0x34
/*
* Known bits returned by \_SB.ATKD.HWRS
*/
#define WL_HWRS 0x80
#define BT_HWRS 0x100
/*
* Flags for hotk status
* WL_ON and BT_ON are also used for wireless_status()
*/
#define WL_ON 0x01 //internal Wifi
#define BT_ON 0x02 //internal Bluetooth
#define MLED_ON 0x04 //mail LED
#define TLED_ON 0x08 //touchpad LED
#define RLED_ON 0x10 //Record LED
#define PLED_ON 0x20 //Phone LED
#define LCD_ON 0x40 //LCD backlight
#define ASUS_LOG ASUS_HOTK_FILE ": "
#define ASUS_ERR KERN_ERR ASUS_LOG
#define ASUS_WARNING KERN_WARNING ASUS_LOG
#define ASUS_NOTICE KERN_NOTICE ASUS_LOG
#define ASUS_INFO KERN_INFO ASUS_LOG
#define ASUS_DEBUG KERN_DEBUG ASUS_LOG
MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary");
MODULE_DESCRIPTION(ASUS_HOTK_NAME);
MODULE_LICENSE("GPL");
#define ASUS_HANDLE(object, paths...) \
static acpi_handle object##_handle = NULL; \
static char *object##_paths[] = { paths }
/* LED */
ASUS_HANDLE(mled_set, ASUS_HOTK_PREFIX "MLED");
ASUS_HANDLE(tled_set, ASUS_HOTK_PREFIX "TLED");
ASUS_HANDLE(rled_set, ASUS_HOTK_PREFIX "RLED"); /* W1JC */
ASUS_HANDLE(pled_set, ASUS_HOTK_PREFIX "PLED"); /* A7J */
/* LEDD */
ASUS_HANDLE(ledd_set, ASUS_HOTK_PREFIX "SLCM");
/* Bluetooth and WLAN
* WLED and BLED are not handled like other XLED, because in some dsdt
* they also control the WLAN/Bluetooth device.
*/
ASUS_HANDLE(wl_switch, ASUS_HOTK_PREFIX "WLED");
ASUS_HANDLE(bt_switch, ASUS_HOTK_PREFIX "BLED");
ASUS_HANDLE(wireless_status, ASUS_HOTK_PREFIX "RSTS"); /* All new models */
/* Brightness */
ASUS_HANDLE(brightness_set, ASUS_HOTK_PREFIX "SPLV");
ASUS_HANDLE(brightness_get, ASUS_HOTK_PREFIX "GPLV");
/* Backlight */
ASUS_HANDLE(lcd_switch, "\\_SB.PCI0.SBRG.EC0._Q10", /* All new models */
"\\_SB.PCI0.ISA.EC0._Q10", /* A1x */
"\\_SB.PCI0.PX40.ECD0._Q10", /* L3C */
"\\_SB.PCI0.PX40.EC0.Q10", /* M1A */
"\\_SB.PCI0.LPCB.EC0._Q10", /* P30 */
"\\_SB.PCI0.PX40.Q10", /* S1x */
"\\Q10"); /* A2x, L2D, L3D, M2E */
/* Display */
ASUS_HANDLE(display_set, ASUS_HOTK_PREFIX "SDSP");
ASUS_HANDLE(display_get, "\\_SB.PCI0.P0P1.VGA.GETD", /* A6B, A6K A6R A7D F3JM L4R M6R A3G
M6A M6V VX-1 V6J V6V W3Z */
"\\_SB.PCI0.P0P2.VGA.GETD", /* A3E A4K, A4D A4L A6J A7J A8J Z71V M9V
S5A M5A z33A W1Jc W2V */
"\\_SB.PCI0.P0P3.VGA.GETD", /* A6V A6Q */
"\\_SB.PCI0.P0PA.VGA.GETD", /* A6T, A6M */
"\\_SB.PCI0.PCI1.VGAC.NMAP", /* L3C */
"\\_SB.PCI0.VGA.GETD", /* Z96F */
"\\ACTD", /* A2D */
"\\ADVG", /* A4G Z71A W1N W5A W5F M2N M3N M5N M6N S1N S5N */
"\\DNXT", /* P30 */
"\\INFB", /* A2H D1 L2D L3D L3H L2E L5D L5C M1A M2E L4L W3V */
"\\SSTE"); /* A3F A6F A3N A3L M6N W3N W6A */
ASUS_HANDLE(ls_switch, ASUS_HOTK_PREFIX "ALSC"); /* Z71A Z71V */
ASUS_HANDLE(ls_level, ASUS_HOTK_PREFIX "ALSL"); /* Z71A Z71V */
/*
* This is the main structure, we can use it to store anything interesting
* about the hotk device
*/
struct asus_hotk {
char *name; //laptop name
struct acpi_device *device; //the device we are in
acpi_handle handle; //the handle of the hotk device
char status; //status of the hotk, for LEDs, ...
u32 ledd_status; //status of the LED display
u8 light_level; //light sensor level
u8 light_switch; //light sensor switch value
u16 event_count[128]; //count for each event TODO make this better
};
/*
* This header is made available to allow proper configuration given model,
* revision number , ... this info cannot go in struct asus_hotk because it is
* available before the hotk
*/
static struct acpi_table_header *asus_info;
/* The actual device the driver binds to */
static struct asus_hotk *hotk;
/*
* The hotkey driver declaration
*/
static int asus_hotk_add(struct acpi_device *device);
static int asus_hotk_remove(struct acpi_device *device, int type);
static struct acpi_driver asus_hotk_driver = {
.name = ASUS_HOTK_NAME,
.class = ASUS_HOTK_CLASS,
.ids = ASUS_HOTK_HID,
.ops = {
.add = asus_hotk_add,
.remove = asus_hotk_remove,
},
};
/* The backlight device /sys/class/backlight */
static struct backlight_device *asus_backlight_device;
/*
* The backlight class declaration
*/
static int read_brightness(struct backlight_device *bd);
static int update_bl_status(struct backlight_device *bd);
static struct backlight_properties asusbl_data = {
.owner = THIS_MODULE,
.get_brightness = read_brightness,
.update_status = update_bl_status,
.max_brightness = 15,
};
/* These functions actually update the LED's, and are called from a
* workqueue. By doing this as separate work rather than when the LED
* subsystem asks, we avoid messing with the Asus ACPI stuff during a
* potentially bad time, such as a timer interrupt. */
static struct workqueue_struct *led_workqueue;
#define ASUS_LED(object, ledname) \
static void object##_led_set(struct led_classdev *led_cdev, \
enum led_brightness value); \
static void object##_led_update(struct work_struct *ignored); \
static int object##_led_wk; \
DECLARE_WORK(object##_led_work, object##_led_update); \
static struct led_classdev object##_led = { \
.name = "asus:" ledname, \
.brightness_set = object##_led_set, \
}
ASUS_LED(mled, "mail");
ASUS_LED(tled, "touchpad");
ASUS_LED(rled, "record");
ASUS_LED(pled, "phone");
/*
* This function evaluates an ACPI method, given an int as parameter, the
* method is searched within the scope of the handle, can be NULL. The output
* of the method is written is output, which can also be NULL
*
* returns 1 if write is successful, 0 else.
*/
static int write_acpi_int(acpi_handle handle, const char *method, int val,
struct acpi_buffer *output)
{
struct acpi_object_list params; //list of input parameters (an int here)
union acpi_object in_obj; //the only param we use
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, ¶ms, output);
return (status == AE_OK);
}
static int read_acpi_int(acpi_handle handle, const char *method, int *val,
struct acpi_object_list *params)
{
struct acpi_buffer output;
union acpi_object out_obj;
acpi_status status;
output.length = sizeof(out_obj);
output.pointer = &out_obj;
status = acpi_evaluate_object(handle, (char *)method, params, &output);
*val = out_obj.integer.value;
return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
}
static int read_wireless_status(int mask)
{
int status;
if (!wireless_status_handle)
return (hotk->status & mask) ? 1 : 0;
if (read_acpi_int(wireless_status_handle, NULL, &status, NULL)) {
return (status & mask) ? 1 : 0;
} else
printk(ASUS_WARNING "Error reading Wireless status\n");
return (hotk->status & mask) ? 1 : 0;
}
/* Generic LED functions */
static int read_status(int mask)
{
/* There is a special method for both wireless devices */
if (mask == BT_ON || mask == WL_ON)
return read_wireless_status(mask);
return (hotk->status & mask) ? 1 : 0;
}
static void write_status(acpi_handle handle, int out, int mask, int invert)
{
hotk->status = (out) ? (hotk->status | mask) : (hotk->status & ~mask);
if (invert) /* invert target value */
out = !out & 0x1;
if (handle && !write_acpi_int(handle, NULL, out, NULL))
printk(ASUS_WARNING " write failed\n");
}
/* /sys/class/led handlers */
#define ASUS_LED_HANDLER(object, mask, invert) \
static void object##_led_set(struct led_classdev *led_cdev, \
enum led_brightness value) \
{ \
object##_led_wk = value; \
queue_work(led_workqueue, &object##_led_work); \
} \
static void object##_led_update(struct work_struct *ignored) \
{ \
int value = object##_led_wk; \
write_status(object##_set_handle, value, (mask), (invert)); \
}
ASUS_LED_HANDLER(mled, MLED_ON, 1);
ASUS_LED_HANDLER(pled, PLED_ON, 0);
ASUS_LED_HANDLER(rled, RLED_ON, 0);
ASUS_LED_HANDLER(tled, TLED_ON, 0);
static int get_lcd_state(void)
{
return read_status(LCD_ON);
}
static int set_lcd_state(int value)
{
int lcd = 0;
acpi_status status = 0;
lcd = value ? 1 : 0;
if (lcd == get_lcd_state())
return 0;
if (lcd_switch_handle) {
status = acpi_evaluate_object(lcd_switch_handle,
NULL, NULL, NULL);
if (ACPI_FAILURE(status))
printk(ASUS_WARNING "Error switching LCD\n");
}
write_status(NULL, lcd, LCD_ON, 0);
return 0;
}
static void lcd_blank(int blank)
{
struct backlight_device *bd = asus_backlight_device;
if (bd) {
down(&bd->sem);
if (likely(bd->props)) {
bd->props->power = blank;
if (likely(bd->props->update_status))
bd->props->update_status(bd);
}
up(&bd->sem);
}
}
static int read_brightness(struct backlight_device *bd)
{
int value;
if (!read_acpi_int(brightness_get_handle, NULL, &value, NULL))
printk(ASUS_WARNING "Error reading brightness\n");
return value;
}
static int set_brightness(struct backlight_device *bd, int value)
{
int ret = 0;
value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
/* 0 <= value <= 15 */
if (!write_acpi_int(brightness_set_handle, NULL, value, NULL)) {
printk(ASUS_WARNING "Error changing brightness\n");
ret = -EIO;
}
return ret;
}
static int update_bl_status(struct backlight_device *bd)
{
int rv;
int value = bd->props->brightness;
rv = set_brightness(bd, value);
if (rv)
return rv;
value = (bd->props->power == FB_BLANK_UNBLANK) ? 1 : 0;
return set_lcd_state(value);
}
/*
* Platform device handlers
*/
/*
* We write our info in page, we begin at offset off and cannot write more
* than count bytes. We set eof to 1 if we handle those 2 values. We return the
* number of bytes written in page
*/
static ssize_t show_infos(struct device *dev,
struct device_attribute *attr, char *page)
{
int len = 0;
int temp;
char buf[16]; //enough for all info
/*
* We use the easy way, we don't care of off and count, so we don't set eof
* to 1
*/
len += sprintf(page, ASUS_HOTK_NAME " " ASUS_LAPTOP_VERSION "\n");
len += sprintf(page + len, "Model reference : %s\n", hotk->name);
/*
* The SFUN method probably allows the original driver to get the list
* of features supported by a given model. For now, 0x0100 or 0x0800
* bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
* The significance of others is yet to be found.
*/
if (read_acpi_int(hotk->handle, "SFUN", &temp, NULL))
len +=
sprintf(page + len, "SFUN value : 0x%04x\n", temp);
/*
* Another value for userspace: the ASYM method returns 0x02 for
* battery low and 0x04 for battery critical, its readings tend to be
* more accurate than those provided by _BST.
* Note: since not all the laptops provide this method, errors are
* silently ignored.
*/
if (read_acpi_int(hotk->handle, "ASYM", &temp, NULL))
len +=
sprintf(page + len, "ASYM value : 0x%04x\n", temp);
if (asus_info) {
snprintf(buf, 16, "%d", asus_info->length);
len += sprintf(page + len, "DSDT length : %s\n", buf);
snprintf(buf, 16, "%d", asus_info->checksum);
len += sprintf(page + len, "DSDT checksum : %s\n", buf);
snprintf(buf, 16, "%d", asus_info->revision);
len += sprintf(page + len, "DSDT revision : %s\n", buf);
snprintf(buf, 7, "%s", asus_info->oem_id);
len += sprintf(page + len, "OEM id : %s\n", buf);
snprintf(buf, 9, "%s", asus_info->oem_table_id);
len += sprintf(page + len, "OEM table id : %s\n", buf);
snprintf(buf, 16, "%x", asus_info->oem_revision);
len += sprintf(page + len, "OEM revision : 0x%s\n", buf);
snprintf(buf, 5, "%s", asus_info->asl_compiler_id);
len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
snprintf(buf, 16, "%x", asus_info->asl_compiler_revision);
len += sprintf(page + len, "ASL comp revision : 0x%s\n", buf);
}
return len;
}
static int parse_arg(const char *buf, unsigned long count, int *val)
{
if (!count)
return 0;
if (count > 31)
return -EINVAL;
if (sscanf(buf, "%i", val) != 1)
return -EINVAL;
return count;
}
static ssize_t store_status(const char *buf, size_t count,
acpi_handle handle, int mask, int invert)
{
int rv, value;
int out = 0;
rv = parse_arg(buf, count, &value);
if (rv > 0)
out = value ? 1 : 0;
write_status(handle, out, mask, invert);
return rv;
}
/*
* LEDD display
*/
static ssize_t show_ledd(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "0x%08x\n", hotk->ledd_status);
}
static ssize_t store_ledd(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
int rv, value;
rv = parse_arg(buf, count, &value);
if (rv > 0) {
if (!write_acpi_int(ledd_set_handle, NULL, value, NULL))
printk(ASUS_WARNING "LED display write failed\n");
else
hotk->ledd_status = (u32) value;
}
return rv;
}
/*
* WLAN
*/
static ssize_t show_wlan(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%d\n", read_status(WL_ON));
}
static ssize_t store_wlan(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
return store_status(buf, count, wl_switch_handle, WL_ON, 0);
}
/*
* Bluetooth
*/
static ssize_t show_bluetooth(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%d\n", read_status(BT_ON));
}
static ssize_t store_bluetooth(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
return store_status(buf, count, bt_switch_handle, BT_ON, 0);
}
/*
* Display
*/
static void set_display(int value)
{
/* no sanity check needed for now */
if (!write_acpi_int(display_set_handle, NULL, value, NULL))
printk(ASUS_WARNING "Error setting display\n");
return;
}
static int read_display(void)
{
int value = 0;
/* In most of the case, we know how to set the display, but sometime
we can't read it */
if (display_get_handle) {
if (!read_acpi_int(display_get_handle, NULL, &value, NULL))
printk(ASUS_WARNING "Error reading display status\n");
}
value &= 0x0F; /* needed for some models, shouldn't hurt others */
return value;
}
/*
* Now, *this* one could be more user-friendly, but so far, no-one has
* complained. The significance of bits is the same as in store_disp()
*/
static ssize_t show_disp(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%d\n", read_display());
}
/*
* Experimental support for display switching. As of now: 1 should activate
* the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI.
* Any combination (bitwise) of these will suffice. I never actually tested 4
* displays hooked up simultaneously, so be warned. See the acpi4asus README
* for more info.
*/
static ssize_t store_disp(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
int rv, value;
rv = parse_arg(buf, count, &value);
if (rv > 0)
set_display(value);
return rv;
}
/*
* Light Sens
*/
static void set_light_sens_switch(int value)
{
if (!write_acpi_int(ls_switch_handle, NULL, value, NULL))
printk(ASUS_WARNING "Error setting light sensor switch\n");
hotk->light_switch = value;
}
static ssize_t show_lssw(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%d\n", hotk->light_switch);
}
static ssize_t store_lssw(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
int rv, value;
rv = parse_arg(buf, count, &value);
if (rv > 0)
set_light_sens_switch(value ? 1 : 0);
return rv;
}
static void set_light_sens_level(int value)
{
if (!write_acpi_int(ls_level_handle, NULL, value, NULL))
printk(ASUS_WARNING "Error setting light sensor level\n");
hotk->light_level = value;
}
static ssize_t show_lslvl(struct device *dev,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%d\n", hotk->light_level);
}
static ssize_t store_lslvl(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
int rv, value;
rv = parse_arg(buf, count, &value);
if (rv > 0) {
value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
/* 0 <= value <= 15 */
set_light_sens_level(value);
}
return rv;
}
static void asus_hotk_notify(acpi_handle handle, u32 event, void *data)
{
/* TODO Find a better way to handle events count. */
if (!hotk)
return;
/*
* We need to tell the backlight device when the backlight power is
* switched
*/
if (event == ATKD_LCD_ON) {
write_status(NULL, 1, LCD_ON, 0);
lcd_blank(FB_BLANK_UNBLANK);
} else if (event == ATKD_LCD_OFF) {
write_status(NULL, 0, LCD_ON, 0);
lcd_blank(FB_BLANK_POWERDOWN);
}
acpi_bus_generate_event(hotk->device, event,
hotk->event_count[event % 128]++);
return;
}
#define ASUS_CREATE_DEVICE_ATTR(_name) \
struct device_attribute dev_attr_##_name = { \
.attr = { \
.name = __stringify(_name), \
.mode = 0, \
.owner = THIS_MODULE }, \
.show = NULL, \
.store = NULL, \
}
#define ASUS_SET_DEVICE_ATTR(_name, _mode, _show, _store) \
do { \
dev_attr_##_name.attr.mode = _mode; \
dev_attr_##_name.show = _show; \
dev_attr_##_name.store = _store; \
} while(0)
static ASUS_CREATE_DEVICE_ATTR(infos);
static ASUS_CREATE_DEVICE_ATTR(wlan);
static ASUS_CREATE_DEVICE_ATTR(bluetooth);
static ASUS_CREATE_DEVICE_ATTR(display);
static ASUS_CREATE_DEVICE_ATTR(ledd);
static ASUS_CREATE_DEVICE_ATTR(ls_switch);
static ASUS_CREATE_DEVICE_ATTR(ls_level);
static struct attribute *asuspf_attributes[] = {
&dev_attr_infos.attr,
&dev_attr_wlan.attr,
&dev_attr_bluetooth.attr,
&dev_attr_display.attr,
&dev_attr_ledd.attr,
&dev_attr_ls_switch.attr,
&dev_attr_ls_level.attr,
NULL
};
static struct attribute_group asuspf_attribute_group = {
.attrs = asuspf_attributes
};
static struct platform_driver asuspf_driver = {
.driver = {
.name = ASUS_HOTK_FILE,
.owner = THIS_MODULE,
}
};
static struct platform_device *asuspf_device;
static void asus_hotk_add_fs(void)
{
ASUS_SET_DEVICE_ATTR(infos, 0444, show_infos, NULL);
if (wl_switch_handle)
ASUS_SET_DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan);
if (bt_switch_handle)
ASUS_SET_DEVICE_ATTR(bluetooth, 0644,
show_bluetooth, store_bluetooth);
if (display_set_handle && display_get_handle)
ASUS_SET_DEVICE_ATTR(display, 0644, show_disp, store_disp);
else if (display_set_handle)
ASUS_SET_DEVICE_ATTR(display, 0200, NULL, store_disp);
if (ledd_set_handle)
ASUS_SET_DEVICE_ATTR(ledd, 0644, show_ledd, store_ledd);
if (ls_switch_handle && ls_level_handle) {
ASUS_SET_DEVICE_ATTR(ls_level, 0644, show_lslvl, store_lslvl);
ASUS_SET_DEVICE_ATTR(ls_switch, 0644, show_lssw, store_lssw);
}
}
static int asus_handle_init(char *name, acpi_handle * handle,
char **paths, int num_paths)
{
int i;
acpi_status status;
for (i = 0; i < num_paths; i++) {
status = acpi_get_handle(NULL, paths[i], handle);
if (ACPI_SUCCESS(status))
return 0;
}
*handle = NULL;
return -ENODEV;
}
#define ASUS_HANDLE_INIT(object) \
asus_handle_init(#object, &object##_handle, object##_paths, \
ARRAY_SIZE(object##_paths))
/*
* This function is used to initialize the hotk with right values. In this
* method, we can make all the detection we want, and modify the hotk struct
*/
static int asus_hotk_get_info(void)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
struct acpi_buffer dsdt = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *model = NULL;
int bsts_result, hwrs_result;
char *string = NULL;
acpi_status status;
/*
* Get DSDT headers early enough to allow for differentiating between
* models, but late enough to allow acpi_bus_register_driver() to fail
* before doing anything ACPI-specific. Should we encounter a machine,
* which needs special handling (i.e. its hotkey device has a different
* HID), this bit will be moved. A global variable asus_info contains
* the DSDT header.
*/
status = acpi_get_table(ACPI_TABLE_ID_DSDT, 1, &dsdt);
if (ACPI_FAILURE(status))
printk(ASUS_WARNING "Couldn't get the DSDT table header\n");
else
asus_info = dsdt.pointer;
/* We have to write 0 on init this far for all ASUS models */
if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
printk(ASUS_ERR "Hotkey initialization failed\n");
return -ENODEV;
}
/* This needs to be called for some laptops to init properly */
if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result, NULL))
printk(ASUS_WARNING "Error calling BSTS\n");
else if (bsts_result)
printk(ASUS_NOTICE "BSTS called, 0x%02x returned\n",
bsts_result);
/*
* Try to match the object returned by INIT to the specific model.
* Handle every possible object (or the lack of thereof) the DSDT
* writers might throw at us. When in trouble, we pass NULL to
* asus_model_match() and try something completely different.
*/
if (buffer.pointer) {
model = buffer.pointer;
switch (model->type) {
case ACPI_TYPE_STRING:
string = model->string.pointer;
break;
case ACPI_TYPE_BUFFER:
string = model->buffer.pointer;
break;
default:
string = "";
break;
}
}
hotk->name = kstrdup(string, GFP_KERNEL);
if (!hotk->name)
return -ENOMEM;
if (*string)
printk(ASUS_NOTICE " %s model detected\n", string);
ASUS_HANDLE_INIT(mled_set);
ASUS_HANDLE_INIT(tled_set);
ASUS_HANDLE_INIT(rled_set);
ASUS_HANDLE_INIT(pled_set);
ASUS_HANDLE_INIT(ledd_set);
/*
* The HWRS method return informations about the hardware.
* 0x80 bit is for WLAN, 0x100 for Bluetooth.
* The significance of others is yet to be found.
* If we don't find the method, we assume the device are present.
*/
if (!read_acpi_int(hotk->handle, "HRWS", &hwrs_result, NULL))
hwrs_result = WL_HWRS | BT_HWRS;
if (hwrs_result & WL_HWRS)
ASUS_HANDLE_INIT(wl_switch);
if (hwrs_result & BT_HWRS)
ASUS_HANDLE_INIT(bt_switch);
ASUS_HANDLE_INIT(wireless_status);
ASUS_HANDLE_INIT(brightness_set);
ASUS_HANDLE_INIT(brightness_get);
ASUS_HANDLE_INIT(lcd_switch);
ASUS_HANDLE_INIT(display_set);
ASUS_HANDLE_INIT(display_get);
/* There is a lot of models with "ALSL", but a few get
a real light sens, so we need to check it. */
if (ASUS_HANDLE_INIT(ls_switch))
ASUS_HANDLE_INIT(ls_level);
kfree(model);
return AE_OK;
}
static int asus_hotk_check(void)
{
int result = 0;
result = acpi_bus_get_status(hotk->device);
if (result)
return result;
if (hotk->device->status.present) {
result = asus_hotk_get_info();
} else {
printk(ASUS_ERR "Hotkey device not present, aborting\n");
return -EINVAL;
}
return result;
}
static int asus_hotk_found;
static int asus_hotk_add(struct acpi_device *device)
{
acpi_status status = AE_OK;
int result;
if (!device)
return -EINVAL;
printk(ASUS_NOTICE "Asus Laptop Support version %s\n",
ASUS_LAPTOP_VERSION);
hotk = kmalloc(sizeof(struct asus_hotk), GFP_KERNEL);
if (!hotk)
return -ENOMEM;
memset(hotk, 0, sizeof(struct asus_hotk));
hotk->handle = device->handle;
strcpy(acpi_device_name(device), ASUS_HOTK_DEVICE_NAME);
strcpy(acpi_device_class(device), ASUS_HOTK_CLASS);
acpi_driver_data(device) = hotk;
hotk->device = device;
result = asus_hotk_check();
if (result)
goto end;
asus_hotk_add_fs();
/*
* We install the handler, it will receive the hotk in parameter, so, we
* could add other data to the hotk struct
*/
status = acpi_install_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
asus_hotk_notify, hotk);
if (ACPI_FAILURE(status))
printk(ASUS_ERR "Error installing notify handler\n");
asus_hotk_found = 1;
/* WLED and BLED are on by default */
write_status(bt_switch_handle, 1, BT_ON, 0);
write_status(wl_switch_handle, 1, WL_ON, 0);
/* LCD Backlight is on by default */
write_status(NULL, 1, LCD_ON, 0);
/* LED display is off by default */
hotk->ledd_status = 0xFFF;
/* Set initial values of light sensor and level */
hotk->light_switch = 1; /* Default to light sensor disabled */
hotk->light_level = 0; /* level 5 for sensor sensitivity */
if (ls_switch_handle)
set_light_sens_switch(hotk->light_switch);
if (ls_level_handle)
set_light_sens_level(hotk->light_level);
end:
if (result) {
kfree(hotk->name);
kfree(hotk);
}
return result;
}
static int asus_hotk_remove(struct acpi_device *device, int type)
{
acpi_status status = 0;
if (!device || !acpi_driver_data(device))
return -EINVAL;
status = acpi_remove_notify_handler(hotk->handle, ACPI_SYSTEM_NOTIFY,
asus_hotk_notify);
if (ACPI_FAILURE(status))
printk(ASUS_ERR "Error removing notify handler\n");
kfree(hotk->name);
kfree(hotk);
return 0;
}
static void asus_backlight_exit(void)
{
if (asus_backlight_device)
backlight_device_unregister(asus_backlight_device);
}
#define ASUS_LED_UNREGISTER(object) \
if(object##_led.class_dev \
&& !IS_ERR(object##_led.class_dev)) \
led_classdev_unregister(&object##_led)
static void asus_led_exit(void)
{
ASUS_LED_UNREGISTER(mled);
ASUS_LED_UNREGISTER(tled);
ASUS_LED_UNREGISTER(pled);
ASUS_LED_UNREGISTER(rled);
destroy_workqueue(led_workqueue);
}
static void __exit asus_laptop_exit(void)
{
asus_backlight_exit();
asus_led_exit();
acpi_bus_unregister_driver(&asus_hotk_driver);
sysfs_remove_group(&asuspf_device->dev.kobj, &asuspf_attribute_group);
platform_device_unregister(asuspf_device);
platform_driver_unregister(&asuspf_driver);
kfree(asus_info);
}
static int asus_backlight_init(struct device *dev)
{
struct backlight_device *bd;
if (brightness_set_handle && lcd_switch_handle) {
bd = backlight_device_register(ASUS_HOTK_FILE, dev,
NULL, &asusbl_data);
if (IS_ERR(bd)) {
printk(ASUS_ERR
"Could not register asus backlight device\n");
asus_backlight_device = NULL;
return PTR_ERR(bd);
}
asus_backlight_device = bd;
down(&bd->sem);
if (likely(bd->props)) {
bd->props->brightness = read_brightness(NULL);
bd->props->power = FB_BLANK_UNBLANK;
if (likely(bd->props->update_status))
bd->props->update_status(bd);
}
up(&bd->sem);
}
return 0;
}
static int asus_led_register(acpi_handle handle,
struct led_classdev *ldev, struct device *dev)
{
if (!handle)
return 0;
return led_classdev_register(dev, ldev);
}
#define ASUS_LED_REGISTER(object, device) \
asus_led_register(object##_set_handle, &object##_led, device)
static int asus_led_init(struct device *dev)
{
int rv;
rv = ASUS_LED_REGISTER(mled, dev);
if (rv)
return rv;
rv = ASUS_LED_REGISTER(tled, dev);
if (rv)
return rv;
rv = ASUS_LED_REGISTER(rled, dev);
if (rv)
return rv;
rv = ASUS_LED_REGISTER(pled, dev);
if (rv)
return rv;
led_workqueue = create_singlethread_workqueue("led_workqueue");
if (!led_workqueue)
return -ENOMEM;
return 0;
}
static int __init asus_laptop_init(void)
{
struct device *dev;
int result;
if (acpi_disabled)
return -ENODEV;
if (!acpi_specific_hotkey_enabled) {
printk(ASUS_ERR "Using generic hotkey driver\n");
return -ENODEV;
}
result = acpi_bus_register_driver(&asus_hotk_driver);
if (result < 0)
return result;
/*
* This is a bit of a kludge. We only want this module loaded
* for ASUS systems, but there's currently no way to probe the
* ACPI namespace for ASUS HIDs. So we just return failure if
* we didn't find one, which will cause the module to be
* unloaded.
*/
if (!asus_hotk_found) {
acpi_bus_unregister_driver(&asus_hotk_driver);
return -ENODEV;
}
dev = acpi_get_physical_device(hotk->device->handle);
result = asus_backlight_init(dev);
if (result)
goto fail_backlight;
result = asus_led_init(dev);
if (result)
goto fail_led;
/* Register platform stuff */
result = platform_driver_register(&asuspf_driver);
if (result)
goto fail_platform_driver;
asuspf_device = platform_device_alloc(ASUS_HOTK_FILE, -1);
if (!asuspf_device) {
result = -ENOMEM;
goto fail_platform_device1;
}
result = platform_device_add(asuspf_device);
if (result)
goto fail_platform_device2;
result = sysfs_create_group(&asuspf_device->dev.kobj,
&asuspf_attribute_group);
if (result)
goto fail_sysfs;
return 0;
fail_sysfs:
platform_device_del(asuspf_device);
fail_platform_device2:
platform_device_put(asuspf_device);
fail_platform_device1:
platform_driver_unregister(&asuspf_driver);
fail_platform_driver:
asus_led_exit();
fail_led:
asus_backlight_exit();
fail_backlight:
return result;
}
module_init(asus_laptop_init);
module_exit(asus_laptop_exit);
