/*
* eepc-laptop.c - Asus Eee PC extras
*
* Based on asus_acpi.c as patched for the Eee PC by Asus:
* ftp://ftp.asus.com/pub/ASUS/EeePC/701/ASUS_ACPI_071126.rar
* Based on eee.c from eeepc-linux
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/platform_device.h>
#include <acpi/acpi_drivers.h>
#include <acpi/acpi_bus.h>
#include <linux/uaccess.h>
#define EEEPC_LAPTOP_VERSION "0.1"
#define EEEPC_HOTK_NAME "Eee PC Hotkey Driver"
#define EEEPC_HOTK_FILE "eeepc"
#define EEEPC_HOTK_CLASS "hotkey"
#define EEEPC_HOTK_DEVICE_NAME "Hotkey"
#define EEEPC_HOTK_HID "ASUS010"
#define EEEPC_LOG EEEPC_HOTK_FILE ": "
#define EEEPC_ERR KERN_ERR EEEPC_LOG
#define EEEPC_WARNING KERN_WARNING EEEPC_LOG
#define EEEPC_NOTICE KERN_NOTICE EEEPC_LOG
#define EEEPC_INFO KERN_INFO EEEPC_LOG
/*
* Definitions for Asus EeePC
*/
#define NOTIFY_WLAN_ON 0x10
enum {
DISABLE_ASL_WLAN = 0x0001,
DISABLE_ASL_BLUETOOTH = 0x0002,
DISABLE_ASL_IRDA = 0x0004,
DISABLE_ASL_CAMERA = 0x0008,
DISABLE_ASL_TV = 0x0010,
DISABLE_ASL_GPS = 0x0020,
DISABLE_ASL_DISPLAYSWITCH = 0x0040,
DISABLE_ASL_MODEM = 0x0080,
DISABLE_ASL_CARDREADER = 0x0100
};
enum {
CM_ASL_WLAN = 0,
CM_ASL_BLUETOOTH,
CM_ASL_IRDA,
CM_ASL_1394,
CM_ASL_CAMERA,
CM_ASL_TV,
CM_ASL_GPS,
CM_ASL_DVDROM,
CM_ASL_DISPLAYSWITCH,
CM_ASL_PANELBRIGHT,
CM_ASL_BIOSFLASH,
CM_ASL_ACPIFLASH,
CM_ASL_CPUFV,
CM_ASL_CPUTEMPERATURE,
CM_ASL_FANCPU,
CM_ASL_FANCHASSIS,
CM_ASL_USBPORT1,
CM_ASL_USBPORT2,
CM_ASL_USBPORT3,
CM_ASL_MODEM,
CM_ASL_CARDREADER,
CM_ASL_LID
};
const char *cm_getv[] = {
"WLDG", NULL, NULL, NULL,
"CAMG", NULL, NULL, NULL,
NULL, "PBLG", NULL, NULL,
"CFVG", NULL, NULL, NULL,
"USBG", NULL, NULL, "MODG",
"CRDG", "LIDG"
};
const char *cm_setv[] = {
"WLDS", NULL, NULL, NULL,
"CAMS", NULL, NULL, NULL,
"SDSP", "PBLS", "HDPS", NULL,
"CFVS", NULL, NULL, NULL,
"USBG", NULL, NULL, "MODS",
"CRDS", NULL
};
/*
* This is the main structure, we can use it to store useful information
* about the hotk device
*/
struct eeepc_hotk {
struct acpi_device *device; /* the device we are in */
acpi_handle handle; /* the handle of the hotk device */
u32 cm_supported; /* the control methods supported
by this BIOS */
uint init_flag; /* Init flags */
u16 event_count[128]; /* count for each event */
};
/* The actual device the driver binds to */
static struct eeepc_hotk *ehotk;
/* Platform device/driver */
static struct platform_driver platform_driver = {
.driver = {
.name = EEEPC_HOTK_FILE,
.owner = THIS_MODULE,
}
};
static struct platform_device *platform_device;
/*
* The hotkey driver declaration
*/
static int eeepc_hotk_add(struct acpi_device *device);
static int eeepc_hotk_remove(struct acpi_device *device, int type);
static const struct acpi_device_id eeepc_device_ids[] = {
{EEEPC_HOTK_HID, 0},
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
static struct acpi_driver eeepc_hotk_driver = {
.name = EEEPC_HOTK_NAME,
.class = EEEPC_HOTK_CLASS,
.ids = eeepc_device_ids,
.ops = {
.add = eeepc_hotk_add,
.remove = eeepc_hotk_remove,
},
};
MODULE_AUTHOR("Corentin Chary, Eric Cooper");
MODULE_DESCRIPTION(EEEPC_HOTK_NAME);
MODULE_LICENSE("GPL");
/*
* ACPI Helpers
*/
static int write_acpi_int(acpi_handle handle, const char *method, int val,
struct acpi_buffer *output)
{
struct acpi_object_list params;
union acpi_object in_obj;
acpi_status status;
params.count = 1;
params.pointer = &in_obj;
in_obj.type = ACPI_TYPE_INTEGER;
in_obj.integer.value = val;
status = acpi_evaluate_object(handle, (char *)method, ¶ms, output);
return (status == AE_OK ? 0 : -1);
}
static int read_acpi_int(acpi_handle handle, const char *method, int *val)
{
acpi_status status;
ulong result;
status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
if (ACPI_FAILURE(status)) {
*val = -1;
return -1;
} else {
*val = result;
return 0;
}
}
static int set_acpi(int cm, int value)
{
if (ehotk->cm_supported & (0x1 << cm)) {
const char *method = cm_setv[cm];
if (method == NULL)
return -ENODEV;
if (write_acpi_int(ehotk->handle, method, value, NULL))
printk(EEEPC_WARNING "Error writing %s\n", method);
}
return 0;
}
static int get_acpi(int cm)
{
int value = -1;
if ((ehotk->cm_supported & (0x1 << cm))) {
const char *method = cm_getv[cm];
if (method == NULL)
return -ENODEV;
if (read_acpi_int(ehotk->handle, method, &value))
printk(EEEPC_WARNING "Error reading %s\n", method);
}
return value;
}
/*
* Sys helpers
*/
static int parse_arg(const char *buf, unsigned long count, int *val)
{
if (!count)
return 0;
if (sscanf(buf, "%i", val) != 1)
return -EINVAL;
return count;
}
static ssize_t store_sys_acpi(int cm, const char *buf, size_t count)
{
int rv, value;
rv = parse_arg(buf, count, &value);
if (rv > 0)
set_acpi(cm, value);
return rv;
}
static ssize_t show_sys_acpi(int cm, char *buf)
{
return sprintf(buf, "%d\n", get_acpi(cm));
}
#define EEEPC_CREATE_DEVICE_ATTR(_name, _cm) \
static ssize_t show_##_name(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
return show_sys_acpi(_cm, buf); \
} \
static ssize_t store_##_name(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
return store_sys_acpi(_cm, buf, count); \
} \
static struct device_attribute dev_attr_##_name = { \
.attr = { \
.name = __stringify(_name), \
.mode = 0644 }, \
.show = show_##_name, \
.store = store_##_name, \
}
EEEPC_CREATE_DEVICE_ATTR(camera, CM_ASL_CAMERA);
EEEPC_CREATE_DEVICE_ATTR(cardr, CM_ASL_CARDREADER);
EEEPC_CREATE_DEVICE_ATTR(disp, CM_ASL_DISPLAYSWITCH);
EEEPC_CREATE_DEVICE_ATTR(wlan, CM_ASL_WLAN);
static struct attribute *platform_attributes[] = {
&dev_attr_camera.attr,
&dev_attr_cardr.attr,
&dev_attr_disp.attr,
&dev_attr_wlan.attr,
NULL
};
static struct attribute_group platform_attribute_group = {
.attrs = platform_attributes
};
/*
* Hotkey functions
*/
static int eeepc_hotk_check(void)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
int result;
result = acpi_bus_get_status(ehotk->device);
if (result)
return result;
if (ehotk->device->status.present) {
if (write_acpi_int(ehotk->handle, "INIT", ehotk->init_flag,
&buffer)) {
printk(EEEPC_ERR "Hotkey initialization failed\n");
return -ENODEV;
} else {
printk(EEEPC_NOTICE "Hotkey init flags 0x%x\n",
ehotk->init_flag);
}
/* get control methods supported */
if (read_acpi_int(ehotk->handle, "CMSG"
, &ehotk->cm_supported)) {
printk(EEEPC_ERR
"Get control methods supported failed\n");
return -ENODEV;
} else {
printk(EEEPC_INFO
"Get control methods supported: 0x%x\n",
ehotk->cm_supported);
}
} else {
printk(EEEPC_ERR "Hotkey device not present, aborting\n");
return -EINVAL;
}
return 0;
}
static void notify_wlan(u32 *event)
{
/* if DISABLE_ASL_WLAN is set, the notify code for fn+f2
will always be 0x10 */
if (ehotk->cm_supported & (0x1 << CM_ASL_WLAN)) {
const char *method = cm_getv[CM_ASL_WLAN];
int value;
if (read_acpi_int(ehotk->handle, method, &value))
printk(EEEPC_WARNING "Error reading %s\n",
method);
else if (value == 1)
*event = 0x11;
}
}
static void eeepc_hotk_notify(acpi_handle handle, u32 event, void *data)
{
if (!ehotk)
return;
if (event == NOTIFY_WLAN_ON && (DISABLE_ASL_WLAN & ehotk->init_flag))
notify_wlan(&event);
acpi_bus_generate_proc_event(ehotk->device, event,
ehotk->event_count[event % 128]++);
}
static int eeepc_hotk_add(struct acpi_device *device)
{
acpi_status status = AE_OK;
int result;
if (!device)
return -EINVAL;
printk(EEEPC_NOTICE EEEPC_HOTK_NAME "\n");
ehotk = kzalloc(sizeof(struct eeepc_hotk), GFP_KERNEL);
if (!ehotk)
return -ENOMEM;
ehotk->init_flag = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
ehotk->handle = device->handle;
strcpy(acpi_device_name(device), EEEPC_HOTK_DEVICE_NAME);
strcpy(acpi_device_class(device), EEEPC_HOTK_CLASS);
acpi_driver_data(device) = ehotk;
ehotk->device = device;
result = eeepc_hotk_check();
if (result)
goto end;
status = acpi_install_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
eeepc_hotk_notify, ehotk);
if (ACPI_FAILURE(status))
printk(EEEPC_ERR "Error installing notify handler\n");
end:
if (result) {
kfree(ehotk);
ehotk = NULL;
}
return result;
}
static int eeepc_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(ehotk->handle, ACPI_SYSTEM_NOTIFY,
eeepc_hotk_notify);
if (ACPI_FAILURE(status))
printk(EEEPC_ERR "Error removing notify handler\n");
kfree(ehotk);
return 0;
}
/*
* exit/init
*/
static void __exit eeepc_laptop_exit(void)
{
acpi_bus_unregister_driver(&eeepc_hotk_driver);
sysfs_remove_group(&platform_device->dev.kobj,
&platform_attribute_group);
platform_device_unregister(platform_device);
platform_driver_unregister(&platform_driver);
}
static int __init eeepc_laptop_init(void)
{
struct device *dev;
int result;
if (acpi_disabled)
return -ENODEV;
result = acpi_bus_register_driver(&eeepc_hotk_driver);
if (result < 0)
return result;
if (!ehotk) {
acpi_bus_unregister_driver(&eeepc_hotk_driver);
return -ENODEV;
}
dev = acpi_get_physical_device(ehotk->device->handle);
/* Register platform stuff */
result = platform_driver_register(&platform_driver);
if (result)
goto fail_platform_driver;
platform_device = platform_device_alloc(EEEPC_HOTK_FILE, -1);
if (!platform_device) {
result = -ENOMEM;
goto fail_platform_device1;
}
result = platform_device_add(platform_device);
if (result)
goto fail_platform_device2;
result = sysfs_create_group(&platform_device->dev.kobj,
&platform_attribute_group);
if (result)
goto fail_sysfs;
return 0;
fail_sysfs:
platform_device_del(platform_device);
fail_platform_device2:
platform_device_put(platform_device);
fail_platform_device1:
platform_driver_unregister(&platform_driver);
fail_platform_driver:
return result;
}
module_init(eeepc_laptop_init);
module_exit(eeepc_laptop_exit);
