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linux/drivers/platform/x86/asus_acpi.c
Matthew Garrett bb7ca747f8 backlight: add backlight type 
There may be multiple ways of controlling the backlight on a given
machine.  Allow drivers to expose the type of interface they are
providing, making it possible for userspace to make appropriate policy
decisions.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: David Airlie <airlied@linux.ie>
Cc: Alex Deucher <alexdeucher@gmail.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-22 17:43:59 -07:00

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/*
* asus_acpi.c - Asus Laptop ACPI Extras
*
*
* Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor
*
* 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.
* <20>ic Burghard - LED display support for W1N
*
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/backlight.h>
#include <acpi/acpi_drivers.h>
#include <acpi/acpi_bus.h>
#include <asm/uaccess.h>
#define ASUS_ACPI_VERSION "0.30"
#define PROC_ASUS "asus" /* The directory */
#define PROC_MLED "mled"
#define PROC_WLED "wled"
#define PROC_TLED "tled"
#define PROC_BT "bluetooth"
#define PROC_LEDD "ledd"
#define PROC_INFO "info"
#define PROC_LCD "lcd"
#define PROC_BRN "brn"
#define PROC_DISP "disp"
#define ACPI_HOTK_NAME "Asus Laptop ACPI Extras Driver"
#define ACPI_HOTK_CLASS "hotkey"
#define ACPI_HOTK_DEVICE_NAME "Hotkey"
/*
* Some events we use, same for all Asus
*/
#define BR_UP 0x10
#define BR_DOWN 0x20
/*
* Flags for hotk status
*/
#define MLED_ON 0x01 /* Mail LED */
#define WLED_ON 0x02 /* Wireless LED */
#define TLED_ON 0x04 /* Touchpad LED */
#define BT_ON 0x08 /* Internal Bluetooth */
MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
MODULE_DESCRIPTION(ACPI_HOTK_NAME);
MODULE_LICENSE("GPL");
static uid_t asus_uid;
static gid_t asus_gid;
module_param(asus_uid, uint, 0);
MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus");
module_param(asus_gid, uint, 0);
MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus");
/* For each model, all features implemented,
* those marked with R are relative to HOTK, A for absolute */
struct model_data {
char *name; /* name of the laptop________________A */
char *mt_mled; /* method to handle mled_____________R */
char *mled_status; /* node to handle mled reading_______A */
char *mt_wled; /* method to handle wled_____________R */
char *wled_status; /* node to handle wled reading_______A */
char *mt_tled; /* method to handle tled_____________R */
char *tled_status; /* node to handle tled reading_______A */
char *mt_ledd; /* method to handle LED display______R */
char *mt_bt_switch; /* method to switch Bluetooth on/off_R */
char *bt_status; /* no model currently supports this__? */
char *mt_lcd_switch; /* method to turn LCD on/off_________A */
char *lcd_status; /* node to read LCD panel state______A */
char *brightness_up; /* method to set brightness up_______A */
char *brightness_down; /* method to set brightness down ____A */
char *brightness_set; /* method to set absolute brightness_R */
char *brightness_get; /* method to get absolute brightness_R */
char *brightness_status;/* node to get brightness____________A */
char *display_set; /* method to set video output________R */
char *display_get; /* method to get video output________R */
};
/*
* This is the main structure, we can use it to store anything interesting
* about the hotk device
*/
struct asus_hotk {
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 */
struct model_data *methods; /* methods available on the laptop */
u8 brightness; /* brightness level */
enum {
A1x = 0, /* A1340D, A1300F */
A2x, /* A2500H */
A4G, /* A4700G */
D1x, /* D1 */
L2D, /* L2000D */
L3C, /* L3800C */
L3D, /* L3400D */
L3H, /* L3H, L2000E, L5D */
L4R, /* L4500R */
L5x, /* L5800C */
L8L, /* L8400L */
M1A, /* M1300A */
M2E, /* M2400E, L4400L */
M6N, /* M6800N, W3400N */
M6R, /* M6700R, A3000G */
P30, /* Samsung P30 */
S1x, /* S1300A, but also L1400B and M2400A (L84F) */
S2x, /* S200 (J1 reported), Victor MP-XP7210 */
W1N, /* W1000N */
W5A, /* W5A */
W3V, /* W3030V */
xxN, /* M2400N, M3700N, M5200N, M6800N,
S1300N, S5200N*/
A4S, /* Z81sp */
F3Sa, /* (Centrino) */
R1F,
END_MODEL
} model; /* Models currently supported */
u16 event_count[128]; /* Count for each event TODO make this better */
};
/* Here we go */
#define A1x_PREFIX "\\_SB.PCI0.ISA.EC0."
#define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0."
#define M1A_PREFIX "\\_SB.PCI0.PX40.EC0."
#define P30_PREFIX "\\_SB.PCI0.LPCB.EC0."
#define S1x_PREFIX "\\_SB.PCI0.PX40."
#define S2x_PREFIX A1x_PREFIX
#define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0."
static struct model_data model_conf[END_MODEL] = {
/*
* TODO I have seen a SWBX and AIBX method on some models, like L1400B,
* it seems to be a kind of switch, but what for ?
*/
{
.name = "A1x",
.mt_mled = "MLED",
.mled_status = "\\MAIL",
.mt_lcd_switch = A1x_PREFIX "_Q10",
.lcd_status = "\\BKLI",
.brightness_up = A1x_PREFIX "_Q0E",
.brightness_down = A1x_PREFIX "_Q0F"},
{
.name = "A2x",
.mt_mled = "MLED",
.mt_wled = "WLED",
.wled_status = "\\SG66",
.mt_lcd_switch = "\\Q10",
.lcd_status = "\\BAOF",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\INFB"},
{
.name = "A4G",
.mt_mled = "MLED",
/* WLED present, but not controlled by ACPI */
.mt_lcd_switch = xxN_PREFIX "_Q10",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\ADVG"},
{
.name = "D1x",
.mt_mled = "MLED",
.mt_lcd_switch = "\\Q0D",
.lcd_status = "\\GP11",
.brightness_up = "\\Q0C",
.brightness_down = "\\Q0B",
.brightness_status = "\\BLVL",
.display_set = "SDSP",
.display_get = "\\INFB"},
{
.name = "L2D",
.mt_mled = "MLED",
.mled_status = "\\SGP6",
.mt_wled = "WLED",
.wled_status = "\\RCP3",
.mt_lcd_switch = "\\Q10",
.lcd_status = "\\SGP0",
.brightness_up = "\\Q0E",
.brightness_down = "\\Q0F",
.display_set = "SDSP",
.display_get = "\\INFB"},
{
.name = "L3C",
.mt_mled = "MLED",
.mt_wled = "WLED",
.mt_lcd_switch = L3C_PREFIX "_Q10",
.lcd_status = "\\GL32",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"},
{
.name = "L3D",
.mt_mled = "MLED",
.mled_status = "\\MALD",
.mt_wled = "WLED",
.mt_lcd_switch = "\\Q10",
.lcd_status = "\\BKLG",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\INFB"},
{
.name = "L3H",
.mt_mled = "MLED",
.mt_wled = "WLED",
.mt_lcd_switch = "EHK",
.lcd_status = "\\_SB.PCI0.PM.PBC",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\INFB"},
{
.name = "L4R",
.mt_mled = "MLED",
.mt_wled = "WLED",
.wled_status = "\\_SB.PCI0.SBRG.SG13",
.mt_lcd_switch = xxN_PREFIX "_Q10",
.lcd_status = "\\_SB.PCI0.SBSM.SEO4",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
{
.name = "L5x",
.mt_mled = "MLED",
/* WLED present, but not controlled by ACPI */
.mt_tled = "TLED",
.mt_lcd_switch = "\\Q0D",
.lcd_status = "\\BAOF",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\INFB"},
{
.name = "L8L"
/* No features, but at least support the hotkeys */
},
{
.name = "M1A",
.mt_mled = "MLED",
.mt_lcd_switch = M1A_PREFIX "Q10",
.lcd_status = "\\PNOF",
.brightness_up = M1A_PREFIX "Q0E",
.brightness_down = M1A_PREFIX "Q0F",
.brightness_status = "\\BRIT",
.display_set = "SDSP",
.display_get = "\\INFB"},
{
.name = "M2E",
.mt_mled = "MLED",
.mt_wled = "WLED",
.mt_lcd_switch = "\\Q10",
.lcd_status = "\\GP06",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\INFB"},
{
.name = "M6N",
.mt_mled = "MLED",
.mt_wled = "WLED",
.wled_status = "\\_SB.PCI0.SBRG.SG13",
.mt_lcd_switch = xxN_PREFIX "_Q10",
.lcd_status = "\\_SB.BKLT",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\SSTE"},
{
.name = "M6R",
.mt_mled = "MLED",
.mt_wled = "WLED",
.mt_lcd_switch = xxN_PREFIX "_Q10",
.lcd_status = "\\_SB.PCI0.SBSM.SEO4",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
{
.name = "P30",
.mt_wled = "WLED",
.mt_lcd_switch = P30_PREFIX "_Q0E",
.lcd_status = "\\BKLT",
.brightness_up = P30_PREFIX "_Q68",
.brightness_down = P30_PREFIX "_Q69",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\DNXT"},
{
.name = "S1x",
.mt_mled = "MLED",
.mled_status = "\\EMLE",
.mt_wled = "WLED",
.mt_lcd_switch = S1x_PREFIX "Q10",
.lcd_status = "\\PNOF",
.brightness_set = "SPLV",
.brightness_get = "GPLV"},
{
.name = "S2x",
.mt_mled = "MLED",
.mled_status = "\\MAIL",
.mt_lcd_switch = S2x_PREFIX "_Q10",
.lcd_status = "\\BKLI",
.brightness_up = S2x_PREFIX "_Q0B",
.brightness_down = S2x_PREFIX "_Q0A"},
{
.name = "W1N",
.mt_mled = "MLED",
.mt_wled = "WLED",
.mt_ledd = "SLCM",
.mt_lcd_switch = xxN_PREFIX "_Q10",
.lcd_status = "\\BKLT",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\ADVG"},
{
.name = "W5A",
.mt_bt_switch = "BLED",
.mt_wled = "WLED",
.mt_lcd_switch = xxN_PREFIX "_Q10",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\ADVG"},
{
.name = "W3V",
.mt_mled = "MLED",
.mt_wled = "WLED",
.mt_lcd_switch = xxN_PREFIX "_Q10",
.lcd_status = "\\BKLT",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\INFB"},
{
.name = "xxN",
.mt_mled = "MLED",
/* WLED present, but not controlled by ACPI */
.mt_lcd_switch = xxN_PREFIX "_Q10",
.lcd_status = "\\BKLT",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\ADVG"},
{
.name = "A4S",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.mt_bt_switch = "BLED",
.mt_wled = "WLED"
},
{
.name = "F3Sa",
.mt_bt_switch = "BLED",
.mt_wled = "WLED",
.mt_mled = "MLED",
.brightness_get = "GPLV",
.brightness_set = "SPLV",
.mt_lcd_switch = "\\_SB.PCI0.SBRG.EC0._Q10",
.lcd_status = "\\_SB.PCI0.SBRG.EC0.RPIN",
.display_get = "\\ADVG",
.display_set = "SDSP",
},
{
.name = "R1F",
.mt_bt_switch = "BLED",
.mt_mled = "MLED",
.mt_wled = "WLED",
.mt_lcd_switch = "\\Q10",
.lcd_status = "\\GP06",
.brightness_set = "SPLV",
.brightness_get = "GPLV",
.display_set = "SDSP",
.display_get = "\\INFB"
}
};
/* procdir we use */
static struct proc_dir_entry *asus_proc_dir;
static struct backlight_device *asus_backlight_device;
/*
* 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 and autoloading declaration
*/
static int asus_hotk_add(struct acpi_device *device);
static int asus_hotk_remove(struct acpi_device *device, int type);
static void asus_hotk_notify(struct acpi_device *device, u32 event);
static const struct acpi_device_id asus_device_ids[] = {
{"ATK0100", 0},
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, asus_device_ids);
static struct acpi_driver asus_hotk_driver = {
.name = "asus_acpi",
.class = ACPI_HOTK_CLASS,
.owner = THIS_MODULE,
.ids = asus_device_ids,
.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
.ops = {
.add = asus_hotk_add,
.remove = asus_hotk_remove,
.notify = asus_hotk_notify,
},
};
/*
* 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 (int) */
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, &params, output);
return (status == AE_OK);
}
static int read_acpi_int(acpi_handle handle, const char *method, int *val)
{
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, NULL, &output);
*val = out_obj.integer.value;
return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
}
static int asus_info_proc_show(struct seq_file *m, void *v)
{
int temp;
seq_printf(m, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
seq_printf(m, "Model reference : %s\n", hotk->methods->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))
seq_printf(m, "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))
seq_printf(m, "ASYM value : 0x%04x\n", temp);
if (asus_info) {
seq_printf(m, "DSDT length : %d\n", asus_info->length);
seq_printf(m, "DSDT checksum : %d\n", asus_info->checksum);
seq_printf(m, "DSDT revision : %d\n", asus_info->revision);
seq_printf(m, "OEM id : %.*s\n", ACPI_OEM_ID_SIZE, asus_info->oem_id);
seq_printf(m, "OEM table id : %.*s\n", ACPI_OEM_TABLE_ID_SIZE, asus_info->oem_table_id);
seq_printf(m, "OEM revision : 0x%x\n", asus_info->oem_revision);
seq_printf(m, "ASL comp vendor id : %.*s\n", ACPI_NAME_SIZE, asus_info->asl_compiler_id);
seq_printf(m, "ASL comp revision : 0x%x\n", asus_info->asl_compiler_revision);
}
return 0;
}
static int asus_info_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, asus_info_proc_show, NULL);
}
static const struct file_operations asus_info_proc_fops = {
.owner = THIS_MODULE,
.open = asus_info_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
/*
* /proc 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
*/
/* Generic LED functions */
static int read_led(const char *ledname, int ledmask)
{
if (ledname) {
int led_status;
if (read_acpi_int(NULL, ledname, &led_status))
return led_status;
else
printk(KERN_WARNING "Asus ACPI: Error reading LED "
"status\n");
}
return (hotk->status & ledmask) ? 1 : 0;
}
static int parse_arg(const char __user *buf, unsigned long count, int *val)
{
char s[32];
if (!count)
return 0;
if (count > 31)
return -EINVAL;
if (copy_from_user(s, buf, count))
return -EFAULT;
s[count] = 0;
if (sscanf(s, "%i", val) != 1)
return -EINVAL;
return count;
}
/* FIXME: kill extraneous args so it can be called independently */
static int
write_led(const char __user *buffer, unsigned long count,
char *ledname, int ledmask, int invert)
{
int rv, value;
int led_out = 0;
rv = parse_arg(buffer, count, &value);
if (rv > 0)
led_out = value ? 1 : 0;
hotk->status =
(led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
if (invert) /* invert target value */
led_out = !led_out;
if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
printk(KERN_WARNING "Asus ACPI: LED (%s) write failed\n",
ledname);
return rv;
}
/*
* Proc handlers for MLED
*/
static int mled_proc_show(struct seq_file *m, void *v)
{
seq_printf(m, "%d\n", read_led(hotk->methods->mled_status, MLED_ON));
return 0;
}
static int mled_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, mled_proc_show, NULL);
}
static ssize_t mled_proc_write(struct file *file, const char __user *buffer,
size_t count, loff_t *pos)
{
return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
}
static const struct file_operations mled_proc_fops = {
.owner = THIS_MODULE,
.open = mled_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = mled_proc_write,
};
/*
* Proc handlers for LED display
*/
static int ledd_proc_show(struct seq_file *m, void *v)
{
seq_printf(m, "0x%08x\n", hotk->ledd_status);
return 0;
}
static int ledd_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, ledd_proc_show, NULL);
}
static ssize_t ledd_proc_write(struct file *file, const char __user *buffer,
size_t count, loff_t *pos)
{
int rv, value;
rv = parse_arg(buffer, count, &value);
if (rv > 0) {
if (!write_acpi_int
(hotk->handle, hotk->methods->mt_ledd, value, NULL))
printk(KERN_WARNING
"Asus ACPI: LED display write failed\n");
else
hotk->ledd_status = (u32) value;
}
return rv;
}
static const struct file_operations ledd_proc_fops = {
.owner = THIS_MODULE,
.open = ledd_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = ledd_proc_write,
};
/*
* Proc handlers for WLED
*/
static int wled_proc_show(struct seq_file *m, void *v)
{
seq_printf(m, "%d\n", read_led(hotk->methods->wled_status, WLED_ON));
return 0;
}
static int wled_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, wled_proc_show, NULL);
}
static ssize_t wled_proc_write(struct file *file, const char __user *buffer,
size_t count, loff_t *pos)
{
return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
}
static const struct file_operations wled_proc_fops = {
.owner = THIS_MODULE,
.open = wled_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = wled_proc_write,
};
/*
* Proc handlers for Bluetooth
*/
static int bluetooth_proc_show(struct seq_file *m, void *v)
{
seq_printf(m, "%d\n", read_led(hotk->methods->bt_status, BT_ON));
return 0;
}
static int bluetooth_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, bluetooth_proc_show, NULL);
}
static ssize_t bluetooth_proc_write(struct file *file,
const char __user *buffer, size_t count, loff_t *pos)
{
/* Note: mt_bt_switch controls both internal Bluetooth adapter's
presence and its LED */
return write_led(buffer, count, hotk->methods->mt_bt_switch, BT_ON, 0);
}
static const struct file_operations bluetooth_proc_fops = {
.owner = THIS_MODULE,
.open = bluetooth_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = bluetooth_proc_write,
};
/*
* Proc handlers for TLED
*/
static int tled_proc_show(struct seq_file *m, void *v)
{
seq_printf(m, "%d\n", read_led(hotk->methods->tled_status, TLED_ON));
return 0;
}
static int tled_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, tled_proc_show, NULL);
}
static ssize_t tled_proc_write(struct file *file, const char __user *buffer,
size_t count, loff_t *pos)
{
return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
}
static const struct file_operations tled_proc_fops = {
.owner = THIS_MODULE,
.open = tled_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = tled_proc_write,
};
static int get_lcd_state(void)
{
int lcd = 0;
if (hotk->model == L3H) {
/* L3H and the like have to be handled differently */
acpi_status status = 0;
struct acpi_object_list input;
union acpi_object mt_params[2];
struct acpi_buffer output;
union acpi_object out_obj;
input.count = 2;
input.pointer = mt_params;
/* Note: the following values are partly guessed up, but
otherwise they seem to work */
mt_params[0].type = ACPI_TYPE_INTEGER;
mt_params[0].integer.value = 0x02;
mt_params[1].type = ACPI_TYPE_INTEGER;
mt_params[1].integer.value = 0x02;
output.length = sizeof(out_obj);
output.pointer = &out_obj;
status =
acpi_evaluate_object(NULL, hotk->methods->lcd_status,
&input, &output);
if (status != AE_OK)
return -1;
if (out_obj.type == ACPI_TYPE_INTEGER)
/* That's what the AML code does */
lcd = out_obj.integer.value >> 8;
} else if (hotk->model == F3Sa) {
unsigned long long tmp;
union acpi_object param;
struct acpi_object_list input;
acpi_status status;
/* Read pin 11 */
param.type = ACPI_TYPE_INTEGER;
param.integer.value = 0x11;
input.count = 1;
input.pointer = &param;
status = acpi_evaluate_integer(NULL, hotk->methods->lcd_status,
&input, &tmp);
if (status != AE_OK)
return -1;
lcd = tmp;
} else {
/* We don't have to check anything if we are here */
if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
printk(KERN_WARNING
"Asus ACPI: Error reading LCD status\n");
if (hotk->model == L2D)
lcd = ~lcd;
}
return (lcd & 1);
}
static int set_lcd_state(int value)
{
int lcd = 0;
acpi_status status = 0;
lcd = value ? 1 : 0;
if (lcd != get_lcd_state()) {
/* switch */
if (hotk->model != L3H) {
status =
acpi_evaluate_object(NULL,
hotk->methods->mt_lcd_switch,
NULL, NULL);
} else {
/* L3H and the like must be handled differently */
if (!write_acpi_int
(hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
NULL))
status = AE_ERROR;
/* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
the exact behaviour is simulated here */
}
if (ACPI_FAILURE(status))
printk(KERN_WARNING "Asus ACPI: Error switching LCD\n");
}
return 0;
}
static int lcd_proc_show(struct seq_file *m, void *v)
{
seq_printf(m, "%d\n", get_lcd_state());
return 0;
}
static int lcd_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, lcd_proc_show, NULL);
}
static ssize_t lcd_proc_write(struct file *file, const char __user *buffer,
size_t count, loff_t *pos)
{
int rv, value;
rv = parse_arg(buffer, count, &value);
if (rv > 0)
set_lcd_state(value);
return rv;
}
static const struct file_operations lcd_proc_fops = {
.owner = THIS_MODULE,
.open = lcd_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = lcd_proc_write,
};
static int read_brightness(struct backlight_device *bd)
{
int value;
if (hotk->methods->brightness_get) { /* SPLV/GPLV laptop */
if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
&value))
printk(KERN_WARNING
"Asus ACPI: Error reading brightness\n");
} else if (hotk->methods->brightness_status) { /* For D1 for example */
if (!read_acpi_int(NULL, hotk->methods->brightness_status,
&value))
printk(KERN_WARNING
"Asus ACPI: Error reading brightness\n");
} else /* No GPLV method */
value = hotk->brightness;
return value;
}
/*
* Change the brightness level
*/
static int set_brightness(int value)
{
acpi_status status = 0;
int ret = 0;
/* SPLV laptop */
if (hotk->methods->brightness_set) {
if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
value, NULL)) {
printk(KERN_WARNING
"Asus ACPI: Error changing brightness\n");
ret = -EIO;
}
goto out;
}
/* No SPLV method if we are here, act as appropriate */
value -= read_brightness(NULL);
while (value != 0) {
status = acpi_evaluate_object(NULL, (value > 0) ?
hotk->methods->brightness_up :
hotk->methods->brightness_down,
NULL, NULL);
(value > 0) ? value-- : value++;
if (ACPI_FAILURE(status)) {
printk(KERN_WARNING
"Asus ACPI: Error changing brightness\n");
ret = -EIO;
}
}
out:
return ret;
}
static int set_brightness_status(struct backlight_device *bd)
{
return set_brightness(bd->props.brightness);
}
static int brn_proc_show(struct seq_file *m, void *v)
{
seq_printf(m, "%d\n", read_brightness(NULL));
return 0;
}
static int brn_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, brn_proc_show, NULL);
}
static ssize_t brn_proc_write(struct file *file, const char __user *buffer,
size_t count, loff_t *pos)
{
int rv, value;
rv = parse_arg(buffer, count, &value);
if (rv > 0) {
value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
/* 0 <= value <= 15 */
set_brightness(value);
}
return rv;
}
static const struct file_operations brn_proc_fops = {
.owner = THIS_MODULE,
.open = brn_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = brn_proc_write,
};
static void set_display(int value)
{
/* no sanity check needed for now */
if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
value, NULL))
printk(KERN_WARNING "Asus ACPI: Error setting display\n");
return;
}
/*
* Now, *this* one could be more user-friendly, but so far, no-one has
* complained. The significance of bits is the same as in proc_write_disp()
*/
static int disp_proc_show(struct seq_file *m, void *v)
{
int value = 0;
if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
printk(KERN_WARNING
"Asus ACPI: Error reading display status\n");
value &= 0x07; /* needed for some models, shouldn't hurt others */
seq_printf(m, "%d\n", value);
return 0;
}
static int disp_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, disp_proc_show, NULL);
}
/*
* Experimental support for display switching. As of now: 1 should activate
* the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
* (bitwise) of these will suffice. I never actually tested 3 displays hooked
* up simultaneously, so be warned. See the acpi4asus README for more info.
*/
static ssize_t disp_proc_write(struct file *file, const char __user *buffer,
size_t count, loff_t *pos)
{
int rv, value;
rv = parse_arg(buffer, count, &value);
if (rv > 0)
set_display(value);
return rv;
}
static const struct file_operations disp_proc_fops = {
.owner = THIS_MODULE,
.open = disp_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = disp_proc_write,
};
static int
asus_proc_add(char *name, const struct file_operations *proc_fops, mode_t mode,
struct acpi_device *device)
{
struct proc_dir_entry *proc;
proc = proc_create_data(name, mode, acpi_device_dir(device),
proc_fops, acpi_driver_data(device));
if (!proc) {
printk(KERN_WARNING " Unable to create %s fs entry\n", name);
return -1;
}
proc->uid = asus_uid;
proc->gid = asus_gid;
return 0;
}
static int asus_hotk_add_fs(struct acpi_device *device)
{
struct proc_dir_entry *proc;
mode_t mode;
if ((asus_uid == 0) && (asus_gid == 0)) {
mode = S_IFREG | S_IRUGO | S_IWUSR | S_IWGRP;
} else {
mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
printk(KERN_WARNING " asus_uid and asus_gid parameters are "
"deprecated, use chown and chmod instead!\n");
}
acpi_device_dir(device) = asus_proc_dir;
if (!acpi_device_dir(device))
return -ENODEV;
proc = proc_create(PROC_INFO, mode, acpi_device_dir(device),
&asus_info_proc_fops);
if (proc) {
proc->uid = asus_uid;
proc->gid = asus_gid;
} else {
printk(KERN_WARNING " Unable to create " PROC_INFO
" fs entry\n");
}
if (hotk->methods->mt_wled) {
asus_proc_add(PROC_WLED, &wled_proc_fops, mode, device);
}
if (hotk->methods->mt_ledd) {
asus_proc_add(PROC_LEDD, &ledd_proc_fops, mode, device);
}
if (hotk->methods->mt_mled) {
asus_proc_add(PROC_MLED, &mled_proc_fops, mode, device);
}
if (hotk->methods->mt_tled) {
asus_proc_add(PROC_TLED, &tled_proc_fops, mode, device);
}
if (hotk->methods->mt_bt_switch) {
asus_proc_add(PROC_BT, &bluetooth_proc_fops, mode, device);
}
/*
* We need both read node and write method as LCD switch is also
* accessible from the keyboard
*/
if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
asus_proc_add(PROC_LCD, &lcd_proc_fops, mode, device);
}
if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
(hotk->methods->brightness_get && hotk->methods->brightness_set)) {
asus_proc_add(PROC_BRN, &brn_proc_fops, mode, device);
}
if (hotk->methods->display_set) {
asus_proc_add(PROC_DISP, &disp_proc_fops, mode, device);
}
return 0;
}
static int asus_hotk_remove_fs(struct acpi_device *device)
{
if (acpi_device_dir(device)) {
remove_proc_entry(PROC_INFO, acpi_device_dir(device));
if (hotk->methods->mt_wled)
remove_proc_entry(PROC_WLED, acpi_device_dir(device));
if (hotk->methods->mt_mled)
remove_proc_entry(PROC_MLED, acpi_device_dir(device));
if (hotk->methods->mt_tled)
remove_proc_entry(PROC_TLED, acpi_device_dir(device));
if (hotk->methods->mt_ledd)
remove_proc_entry(PROC_LEDD, acpi_device_dir(device));
if (hotk->methods->mt_bt_switch)
remove_proc_entry(PROC_BT, acpi_device_dir(device));
if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
remove_proc_entry(PROC_LCD, acpi_device_dir(device));
if ((hotk->methods->brightness_up
&& hotk->methods->brightness_down)
|| (hotk->methods->brightness_get
&& hotk->methods->brightness_set))
remove_proc_entry(PROC_BRN, acpi_device_dir(device));
if (hotk->methods->display_set)
remove_proc_entry(PROC_DISP, acpi_device_dir(device));
}
return 0;
}
static void asus_hotk_notify(struct acpi_device *device, u32 event)
{
/* TODO Find a better way to handle events count. */
if (!hotk)
return;
/*
* The BIOS *should* be sending us device events, but apparently
* Asus uses system events instead, so just ignore any device
* events we get.
*/
if (event > ACPI_MAX_SYS_NOTIFY)
return;
if ((event & ~((u32) BR_UP)) < 16)
hotk->brightness = (event & ~((u32) BR_UP));
else if ((event & ~((u32) BR_DOWN)) < 16)
hotk->brightness = (event & ~((u32) BR_DOWN));
acpi_bus_generate_proc_event(hotk->device, event,
hotk->event_count[event % 128]++);
return;
}
/*
* Match the model string to the list of supported models. Return END_MODEL if
* no match or model is NULL.
*/
static int asus_model_match(char *model)
{
if (model == NULL)
return END_MODEL;
if (strncmp(model, "L3D", 3) == 0)
return L3D;
else if (strncmp(model, "L2E", 3) == 0 ||
strncmp(model, "L3H", 3) == 0 || strncmp(model, "L5D", 3) == 0)
return L3H;
else if (strncmp(model, "L3", 2) == 0 || strncmp(model, "L2B", 3) == 0)
return L3C;
else if (strncmp(model, "L8L", 3) == 0)
return L8L;
else if (strncmp(model, "L4R", 3) == 0)
return L4R;
else if (strncmp(model, "M6N", 3) == 0 || strncmp(model, "W3N", 3) == 0)
return M6N;
else if (strncmp(model, "M6R", 3) == 0 || strncmp(model, "A3G", 3) == 0)
return M6R;
else if (strncmp(model, "M2N", 3) == 0 ||
strncmp(model, "M3N", 3) == 0 ||
strncmp(model, "M5N", 3) == 0 ||
strncmp(model, "S1N", 3) == 0 ||
strncmp(model, "S5N", 3) == 0)
return xxN;
else if (strncmp(model, "M1", 2) == 0)
return M1A;
else if (strncmp(model, "M2", 2) == 0 || strncmp(model, "L4E", 3) == 0)
return M2E;
else if (strncmp(model, "L2", 2) == 0)
return L2D;
else if (strncmp(model, "L8", 2) == 0)
return S1x;
else if (strncmp(model, "D1", 2) == 0)
return D1x;
else if (strncmp(model, "A1", 2) == 0)
return A1x;
else if (strncmp(model, "A2", 2) == 0)
return A2x;
else if (strncmp(model, "J1", 2) == 0)
return S2x;
else if (strncmp(model, "L5", 2) == 0)
return L5x;
else if (strncmp(model, "A4G", 3) == 0)
return A4G;
else if (strncmp(model, "W1N", 3) == 0)
return W1N;
else if (strncmp(model, "W3V", 3) == 0)
return W3V;
else if (strncmp(model, "W5A", 3) == 0)
return W5A;
else if (strncmp(model, "R1F", 3) == 0)
return R1F;
else if (strncmp(model, "A4S", 3) == 0)
return A4S;
else if (strncmp(model, "F3Sa", 4) == 0)
return F3Sa;
else
return END_MODEL;
}
/*
* 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 };
union acpi_object *model = NULL;
int bsts_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_SIG_DSDT, 1, &asus_info);
if (ACPI_FAILURE(status))
printk(KERN_WARNING " Couldn't get the DSDT table header\n");
/* We have to write 0 on init this far for all ASUS models */
if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
printk(KERN_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))
printk(KERN_WARNING " Error calling BSTS\n");
else if (bsts_result)
printk(KERN_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:
kfree(model);
model = NULL;
break;
}
}
hotk->model = asus_model_match(string);
if (hotk->model == END_MODEL) { /* match failed */
if (asus_info &&
strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
hotk->model = P30;
printk(KERN_NOTICE
" Samsung P30 detected, supported\n");
hotk->methods = &model_conf[hotk->model];
kfree(model);
return 0;
} else {
hotk->model = M2E;
printk(KERN_NOTICE " unsupported model %s, trying "
"default values\n", string);
printk(KERN_NOTICE
" send /proc/acpi/dsdt to the developers\n");
kfree(model);
return -ENODEV;
}
}
hotk->methods = &model_conf[hotk->model];
printk(KERN_NOTICE " %s model detected, supported\n", string);
/* Sort of per-model blacklist */
if (strncmp(string, "L2B", 3) == 0)
hotk->methods->lcd_status = NULL;
/* L2B is similar enough to L3C to use its settings, with this only
exception */
else if (strncmp(string, "A3G", 3) == 0)
hotk->methods->lcd_status = "\\BLFG";
/* A3G is like M6R */
else if (strncmp(string, "S5N", 3) == 0 ||
strncmp(string, "M5N", 3) == 0 ||
strncmp(string, "W3N", 3) == 0)
hotk->methods->mt_mled = NULL;
/* S5N, M5N and W3N have no MLED */
else if (strncmp(string, "L5D", 3) == 0)
hotk->methods->mt_wled = NULL;
/* L5D's WLED is not controlled by ACPI */
else if (strncmp(string, "M2N", 3) == 0 ||
strncmp(string, "W3V", 3) == 0 ||
strncmp(string, "S1N", 3) == 0)
hotk->methods->mt_wled = "WLED";
/* M2N, S1N and W3V have a usable WLED */
else if (asus_info) {
if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
hotk->methods->mled_status = NULL;
/* S1300A reports L84F, but L1400B too, account for that */
}
kfree(model);
return 0;
}
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(KERN_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;
printk(KERN_NOTICE "Asus Laptop ACPI Extras version %s\n",
ASUS_ACPI_VERSION);
hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL);
if (!hotk)
return -ENOMEM;
hotk->handle = device->handle;
strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
device->driver_data = hotk;
hotk->device = device;
result = asus_hotk_check();
if (result)
goto end;
result = asus_hotk_add_fs(device);
if (result)
goto end;
/* For laptops without GPLV: init the hotk->brightness value */
if ((!hotk->methods->brightness_get)
&& (!hotk->methods->brightness_status)
&& (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
status =
acpi_evaluate_object(NULL, hotk->methods->brightness_down,
NULL, NULL);
if (ACPI_FAILURE(status))
printk(KERN_WARNING " Error changing brightness\n");
else {
status =
acpi_evaluate_object(NULL,
hotk->methods->brightness_up,
NULL, NULL);
if (ACPI_FAILURE(status))
printk(KERN_WARNING " Strange, error changing"
" brightness\n");
}
}
asus_hotk_found = 1;
/* LED display is off by default */
hotk->ledd_status = 0xFFF;
end:
if (result)
kfree(hotk);
return result;
}
static int asus_hotk_remove(struct acpi_device *device, int type)
{
asus_hotk_remove_fs(device);
kfree(hotk);
return 0;
}
static const struct backlight_ops asus_backlight_data = {
.get_brightness = read_brightness,
.update_status = set_brightness_status,
};
static void asus_acpi_exit(void)
{
if (asus_backlight_device)
backlight_device_unregister(asus_backlight_device);
acpi_bus_unregister_driver(&asus_hotk_driver);
remove_proc_entry(PROC_ASUS, acpi_root_dir);
return;
}
static int __init asus_acpi_init(void)
{
struct backlight_properties props;
int result;
result = acpi_bus_register_driver(&asus_hotk_driver);
if (result < 0)
return result;
asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
if (!asus_proc_dir) {
printk(KERN_ERR "Asus ACPI: Unable to create /proc entry\n");
acpi_bus_unregister_driver(&asus_hotk_driver);
return -ENODEV;
}
/*
* 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);
remove_proc_entry(PROC_ASUS, acpi_root_dir);
return -ENODEV;
}
memset(&props, 0, sizeof(struct backlight_properties));
props.type = BACKLIGHT_PLATFORM;
props.max_brightness = 15;
asus_backlight_device = backlight_device_register("asus", NULL, NULL,
&asus_backlight_data,
&props);
if (IS_ERR(asus_backlight_device)) {
printk(KERN_ERR "Could not register asus backlight device\n");
asus_backlight_device = NULL;
asus_acpi_exit();
return -ENODEV;
}
return 0;
}
module_init(asus_acpi_init);
module_exit(asus_acpi_exit);
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