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linux/drivers/misc/acer-wmi.c

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/*
* Acer WMI Laptop Extras
*
* Copyright (C) 2007-2008 Carlos Corbacho <carlos@strangeworlds.co.uk>
*
* Based on acer_acpi:
* Copyright (C) 2005-2007 E.M. Smith
* Copyright (C) 2007-2008 Carlos Corbacho <cathectic@gmail.com>
*
* 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
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/dmi.h>
#include <linux/fb.h>
#include <linux/backlight.h>
#include <linux/leds.h>
#include <linux/platform_device.h>
#include <linux/acpi.h>
#include <linux/i8042.h>
#include <linux/debugfs.h>
#include <acpi/acpi_drivers.h>
MODULE_AUTHOR("Carlos Corbacho");
MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
MODULE_LICENSE("GPL");
#define ACER_LOGPREFIX "acer-wmi: "
#define ACER_ERR KERN_ERR ACER_LOGPREFIX
#define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
#define ACER_INFO KERN_INFO ACER_LOGPREFIX
/*
* The following defines quirks to get some specific functions to work
* which are known to not be supported over ACPI-WMI (such as the mail LED
* on WMID based Acer's)
*/
struct acer_quirks {
const char *vendor;
const char *model;
u16 quirks;
};
/*
* Magic Number
* Meaning is unknown - this number is required for writing to ACPI for AMW0
* (it's also used in acerhk when directly accessing the BIOS)
*/
#define ACER_AMW0_WRITE 0x9610
/*
* Bit masks for the AMW0 interface
*/
#define ACER_AMW0_WIRELESS_MASK 0x35
#define ACER_AMW0_BLUETOOTH_MASK 0x34
#define ACER_AMW0_MAILLED_MASK 0x31
/*
* Method IDs for WMID interface
*/
#define ACER_WMID_GET_WIRELESS_METHODID 1
#define ACER_WMID_GET_BLUETOOTH_METHODID 2
#define ACER_WMID_GET_BRIGHTNESS_METHODID 3
#define ACER_WMID_SET_WIRELESS_METHODID 4
#define ACER_WMID_SET_BLUETOOTH_METHODID 5
#define ACER_WMID_SET_BRIGHTNESS_METHODID 6
#define ACER_WMID_GET_THREEG_METHODID 10
#define ACER_WMID_SET_THREEG_METHODID 11
/*
* Acer ACPI method GUIDs
*/
#define AMW0_GUID1 "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
#define AMW0_GUID2 "431F16ED-0C2B-444C-B267-27DEB140CF9C"
#define WMID_GUID1 "6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3"
#define WMID_GUID2 "95764E09-FB56-4e83-B31A-37761F60994A"
MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");
/* Temporary workaround until the WMI sysfs interface goes in */
MODULE_ALIAS("dmi:*:*Acer*:*:");
/*
* Interface capability flags
*/
#define ACER_CAP_MAILLED (1<<0)
#define ACER_CAP_WIRELESS (1<<1)
#define ACER_CAP_BLUETOOTH (1<<2)
#define ACER_CAP_BRIGHTNESS (1<<3)
#define ACER_CAP_THREEG (1<<4)
#define ACER_CAP_ANY (0xFFFFFFFF)
/*
* Interface type flags
*/
enum interface_flags {
ACER_AMW0,
ACER_AMW0_V2,
ACER_WMID,
};
#define ACER_DEFAULT_WIRELESS 0
#define ACER_DEFAULT_BLUETOOTH 0
#define ACER_DEFAULT_MAILLED 0
#define ACER_DEFAULT_THREEG 0
static int max_brightness = 0xF;
static int wireless = -1;
static int bluetooth = -1;
static int mailled = -1;
static int brightness = -1;
static int threeg = -1;
static int force_series;
module_param(mailled, int, 0444);
module_param(wireless, int, 0444);
module_param(bluetooth, int, 0444);
module_param(brightness, int, 0444);
module_param(threeg, int, 0444);
module_param(force_series, int, 0444);
MODULE_PARM_DESC(wireless, "Set initial state of Wireless hardware");
MODULE_PARM_DESC(bluetooth, "Set initial state of Bluetooth hardware");
MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
MODULE_PARM_DESC(force_series, "Force a different laptop series");
struct acer_data {
int mailled;
int wireless;
int bluetooth;
int threeg;
int brightness;
};
struct acer_debug {
struct dentry *root;
struct dentry *devices;
u32 wmid_devices;
};
/* Each low-level interface must define at least some of the following */
struct wmi_interface {
/* The WMI device type */
u32 type;
/* The capabilities this interface provides */
u32 capability;
/* Private data for the current interface */
struct acer_data data;
/* debugfs entries associated with this interface */
struct acer_debug debug;
};
/* The static interface pointer, points to the currently detected interface */
static struct wmi_interface *interface;
/*
* Embedded Controller quirks
* Some laptops require us to directly access the EC to either enable or query
* features that are not available through WMI.
*/
struct quirk_entry {
u8 wireless;
u8 mailled;
s8 brightness;
u8 bluetooth;
};
static struct quirk_entry *quirks;
static void set_quirks(void)
{
if (quirks->mailled)
interface->capability |= ACER_CAP_MAILLED;
if (quirks->brightness)
interface->capability |= ACER_CAP_BRIGHTNESS;
}
static int dmi_matched(const struct dmi_system_id *dmi)
{
quirks = dmi->driver_data;
return 0;
}
static struct quirk_entry quirk_unknown = {
};
static struct quirk_entry quirk_acer_aspire_1520 = {
.brightness = -1,
};
static struct quirk_entry quirk_acer_travelmate_2490 = {
.mailled = 1,
};
/* This AMW0 laptop has no bluetooth */
static struct quirk_entry quirk_medion_md_98300 = {
.wireless = 1,
};
static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
.wireless = 2,
};
static struct dmi_system_id acer_quirks[] = {
{
.callback = dmi_matched,
.ident = "Acer Aspire 1360",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
},
.driver_data = &quirk_acer_aspire_1520,
},
{
.callback = dmi_matched,
.ident = "Acer Aspire 1520",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
},
.driver_data = &quirk_acer_aspire_1520,
},
{
.callback = dmi_matched,
.ident = "Acer Aspire 3100",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
},
.driver_data = &quirk_acer_travelmate_2490,
},
{
.callback = dmi_matched,
.ident = "Acer Aspire 3610",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
},
.driver_data = &quirk_acer_travelmate_2490,
},
{
.callback = dmi_matched,
.ident = "Acer Aspire 5100",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
},
.driver_data = &quirk_acer_travelmate_2490,
},
{
.callback = dmi_matched,
.ident = "Acer Aspire 5610",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
},
.driver_data = &quirk_acer_travelmate_2490,
},
{
.callback = dmi_matched,
.ident = "Acer Aspire 5630",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
},
.driver_data = &quirk_acer_travelmate_2490,
},
{
.callback = dmi_matched,
.ident = "Acer Aspire 5650",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
},
.driver_data = &quirk_acer_travelmate_2490,
},
{
.callback = dmi_matched,
.ident = "Acer Aspire 5680",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
},
.driver_data = &quirk_acer_travelmate_2490,
},
{
.callback = dmi_matched,
.ident = "Acer Aspire 9110",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
},
.driver_data = &quirk_acer_travelmate_2490,
},
{
.callback = dmi_matched,
.ident = "Acer TravelMate 2490",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
},
.driver_data = &quirk_acer_travelmate_2490,
},
{
.callback = dmi_matched,
.ident = "Acer TravelMate 4200",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
},
.driver_data = &quirk_acer_travelmate_2490,
},
{
.callback = dmi_matched,
.ident = "Fujitsu Siemens Amilo Li 1718",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
},
.driver_data = &quirk_fujitsu_amilo_li_1718,
},
{
.callback = dmi_matched,
.ident = "Medion MD 98300",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
},
.driver_data = &quirk_medion_md_98300,
},
{}
};
/* Find which quirks are needed for a particular vendor/ model pair */
static void find_quirks(void)
{
if (!force_series) {
dmi_check_system(acer_quirks);
} else if (force_series == 2490) {
quirks = &quirk_acer_travelmate_2490;
}
if (quirks == NULL)
quirks = &quirk_unknown;
set_quirks();
}
/*
* General interface convenience methods
*/
static bool has_cap(u32 cap)
{
if ((interface->capability & cap) != 0)
return 1;
return 0;
}
/*
* AMW0 (V1) interface
*/
struct wmab_args {
u32 eax;
u32 ebx;
u32 ecx;
u32 edx;
};
struct wmab_ret {
u32 eax;
u32 ebx;
u32 ecx;
u32 edx;
u32 eex;
};
static acpi_status wmab_execute(struct wmab_args *regbuf,
struct acpi_buffer *result)
{
struct acpi_buffer input;
acpi_status status;
input.length = sizeof(struct wmab_args);
input.pointer = (u8 *)regbuf;
status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
return status;
}
static acpi_status AMW0_get_u32(u32 *value, u32 cap,
struct wmi_interface *iface)
{
int err;
u8 result;
switch (cap) {
case ACER_CAP_MAILLED:
switch (quirks->mailled) {
default:
err = ec_read(0xA, &result);
if (err)
return AE_ERROR;
*value = (result >> 7) & 0x1;
return AE_OK;
}
break;
case ACER_CAP_WIRELESS:
switch (quirks->wireless) {
case 1:
err = ec_read(0x7B, &result);
if (err)
return AE_ERROR;
*value = result & 0x1;
return AE_OK;
case 2:
err = ec_read(0x71, &result);
if (err)
return AE_ERROR;
*value = result & 0x1;
return AE_OK;
default:
err = ec_read(0xA, &result);
if (err)
return AE_ERROR;
*value = (result >> 2) & 0x1;
return AE_OK;
}
break;
case ACER_CAP_BLUETOOTH:
switch (quirks->bluetooth) {
default:
err = ec_read(0xA, &result);
if (err)
return AE_ERROR;
*value = (result >> 4) & 0x1;
return AE_OK;
}
break;
case ACER_CAP_BRIGHTNESS:
switch (quirks->brightness) {
default:
err = ec_read(0x83, &result);
if (err)
return AE_ERROR;
*value = result;
return AE_OK;
}
break;
default:
return AE_BAD_ADDRESS;
}
return AE_OK;
}
static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
{
struct wmab_args args;
args.eax = ACER_AMW0_WRITE;
args.ebx = value ? (1<<8) : 0;
args.ecx = args.edx = 0;
switch (cap) {
case ACER_CAP_MAILLED:
if (value > 1)
return AE_BAD_PARAMETER;
args.ebx |= ACER_AMW0_MAILLED_MASK;
break;
case ACER_CAP_WIRELESS:
if (value > 1)
return AE_BAD_PARAMETER;
args.ebx |= ACER_AMW0_WIRELESS_MASK;
break;
case ACER_CAP_BLUETOOTH:
if (value > 1)
return AE_BAD_PARAMETER;
args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
break;
case ACER_CAP_BRIGHTNESS:
if (value > max_brightness)
return AE_BAD_PARAMETER;
switch (quirks->brightness) {
default:
return ec_write(0x83, value);
break;
}
default:
return AE_BAD_ADDRESS;
}
/* Actually do the set */
return wmab_execute(&args, NULL);
}
static acpi_status AMW0_find_mailled(void)
{
struct wmab_args args;
struct wmab_ret ret;
acpi_status status = AE_OK;
struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
args.eax = 0x86;
args.ebx = args.ecx = args.edx = 0;
status = wmab_execute(&args, &out);
if (ACPI_FAILURE(status))
return status;
obj = (union acpi_object *) out.pointer;
if (obj && obj->type == ACPI_TYPE_BUFFER &&
obj->buffer.length == sizeof(struct wmab_ret)) {
ret = *((struct wmab_ret *) obj->buffer.pointer);
} else {
return AE_ERROR;
}
if (ret.eex & 0x1)
interface->capability |= ACER_CAP_MAILLED;
kfree(out.pointer);
return AE_OK;
}
static acpi_status AMW0_set_capabilities(void)
{
struct wmab_args args;
struct wmab_ret ret;
acpi_status status = AE_OK;
struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
/*
* On laptops with this strange GUID (non Acer), normal probing doesn't
* work.
*/
if (wmi_has_guid(AMW0_GUID2)) {
interface->capability |= ACER_CAP_WIRELESS;
return AE_OK;
}
args.eax = ACER_AMW0_WRITE;
args.ecx = args.edx = 0;
args.ebx = 0xa2 << 8;
args.ebx |= ACER_AMW0_WIRELESS_MASK;
status = wmab_execute(&args, &out);
if (ACPI_FAILURE(status))
return status;
obj = (union acpi_object *) out.pointer;
if (obj && obj->type == ACPI_TYPE_BUFFER &&
obj->buffer.length == sizeof(struct wmab_ret)) {
ret = *((struct wmab_ret *) obj->buffer.pointer);
} else {
return AE_ERROR;
}
if (ret.eax & 0x1)
interface->capability |= ACER_CAP_WIRELESS;
args.ebx = 2 << 8;
args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
status = wmab_execute(&args, &out);
if (ACPI_FAILURE(status))
return status;
obj = (union acpi_object *) out.pointer;
if (obj && obj->type == ACPI_TYPE_BUFFER
&& obj->buffer.length == sizeof(struct wmab_ret)) {
ret = *((struct wmab_ret *) obj->buffer.pointer);
} else {
return AE_ERROR;
}
if (ret.eax & 0x1)
interface->capability |= ACER_CAP_BLUETOOTH;
kfree(out.pointer);
/*
* This appears to be safe to enable, since all Wistron based laptops
* appear to use the same EC register for brightness, even if they
* differ for wireless, etc
*/
if (quirks->brightness >= 0)
interface->capability |= ACER_CAP_BRIGHTNESS;
return AE_OK;
}
static struct wmi_interface AMW0_interface = {
.type = ACER_AMW0,
};
static struct wmi_interface AMW0_V2_interface = {
.type = ACER_AMW0_V2,
};
/*
* New interface (The WMID interface)
*/
static acpi_status
WMI_execute_u32(u32 method_id, u32 in, u32 *out)
{
struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
u32 tmp;
acpi_status status;
status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
if (ACPI_FAILURE(status))
return status;
obj = (union acpi_object *) result.pointer;
if (obj && obj->type == ACPI_TYPE_BUFFER &&
obj->buffer.length == sizeof(u32)) {
tmp = *((u32 *) obj->buffer.pointer);
} else {
tmp = 0;
}
if (out)
*out = tmp;
kfree(result.pointer);
return status;
}
static acpi_status WMID_get_u32(u32 *value, u32 cap,
struct wmi_interface *iface)
{
acpi_status status;
u8 tmp;
u32 result, method_id = 0;
switch (cap) {
case ACER_CAP_WIRELESS:
method_id = ACER_WMID_GET_WIRELESS_METHODID;
break;
case ACER_CAP_BLUETOOTH:
method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
break;
case ACER_CAP_BRIGHTNESS:
method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
break;
case ACER_CAP_THREEG:
method_id = ACER_WMID_GET_THREEG_METHODID;
break;
case ACER_CAP_MAILLED:
if (quirks->mailled == 1) {
ec_read(0x9f, &tmp);
*value = tmp & 0x1;
return 0;
}
default:
return AE_BAD_ADDRESS;
}
status = WMI_execute_u32(method_id, 0, &result);
if (ACPI_SUCCESS(status))
*value = (u8)result;
return status;
}
static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
{
u32 method_id = 0;
char param;
switch (cap) {
case ACER_CAP_BRIGHTNESS:
if (value > max_brightness)
return AE_BAD_PARAMETER;
method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
break;
case ACER_CAP_WIRELESS:
if (value > 1)
return AE_BAD_PARAMETER;
method_id = ACER_WMID_SET_WIRELESS_METHODID;
break;
case ACER_CAP_BLUETOOTH:
if (value > 1)
return AE_BAD_PARAMETER;
method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
break;
case ACER_CAP_THREEG:
if (value > 1)
return AE_BAD_PARAMETER;
method_id = ACER_WMID_SET_THREEG_METHODID;
break;
case ACER_CAP_MAILLED:
if (value > 1)
return AE_BAD_PARAMETER;
if (quirks->mailled == 1) {
param = value ? 0x92 : 0x93;
i8042_command(&param, 0x1059);
return 0;
}
break;
default:
return AE_BAD_ADDRESS;
}
return WMI_execute_u32(method_id, (u32)value, NULL);
}
static acpi_status WMID_set_capabilities(void)
{
struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
union acpi_object *obj;
acpi_status status;
u32 devices;
status = wmi_query_block(WMID_GUID2, 1, &out);
if (ACPI_FAILURE(status))
return status;
obj = (union acpi_object *) out.pointer;
if (obj && obj->type == ACPI_TYPE_BUFFER &&
obj->buffer.length == sizeof(u32)) {
devices = *((u32 *) obj->buffer.pointer);
} else {
return AE_ERROR;
}
/* Not sure on the meaning of the relevant bits yet to detect these */
interface->capability |= ACER_CAP_WIRELESS;
interface->capability |= ACER_CAP_THREEG;
/* WMID always provides brightness methods */
interface->capability |= ACER_CAP_BRIGHTNESS;
if (devices & 0x10)
interface->capability |= ACER_CAP_BLUETOOTH;
if (!(devices & 0x20))
max_brightness = 0x9;
return status;
}
static struct wmi_interface wmid_interface = {
.type = ACER_WMID,
};
/*
* Generic Device (interface-independent)
*/
static acpi_status get_u32(u32 *value, u32 cap)
{
acpi_status status = AE_BAD_ADDRESS;
switch (interface->type) {
case ACER_AMW0:
status = AMW0_get_u32(value, cap, interface);
break;
case ACER_AMW0_V2:
if (cap == ACER_CAP_MAILLED) {
status = AMW0_get_u32(value, cap, interface);
break;
}
case ACER_WMID:
status = WMID_get_u32(value, cap, interface);
break;
}
return status;
}
static acpi_status set_u32(u32 value, u32 cap)
{
acpi_status status;
if (interface->capability & cap) {
switch (interface->type) {
case ACER_AMW0:
return AMW0_set_u32(value, cap, interface);
case ACER_AMW0_V2:
if (cap == ACER_CAP_MAILLED)
return AMW0_set_u32(value, cap, interface);
/*
* On some models, some WMID methods don't toggle
* properly. For those cases, we want to run the AMW0
* method afterwards to be certain we've really toggled
* the device state.
*/
if (cap == ACER_CAP_WIRELESS ||
cap == ACER_CAP_BLUETOOTH) {
status = WMID_set_u32(value, cap, interface);
if (ACPI_FAILURE(status))
return status;
return AMW0_set_u32(value, cap, interface);
}
case ACER_WMID:
return WMID_set_u32(value, cap, interface);
default:
return AE_BAD_PARAMETER;
}
}
return AE_BAD_PARAMETER;
}
static void __init acer_commandline_init(void)
{
/*
* These will all fail silently if the value given is invalid, or the
* capability isn't available on the given interface
*/
set_u32(mailled, ACER_CAP_MAILLED);
set_u32(wireless, ACER_CAP_WIRELESS);
set_u32(bluetooth, ACER_CAP_BLUETOOTH);
set_u32(threeg, ACER_CAP_THREEG);
set_u32(brightness, ACER_CAP_BRIGHTNESS);
}
/*
* LED device (Mail LED only, no other LEDs known yet)
*/
static void mail_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
set_u32(value, ACER_CAP_MAILLED);
}
static struct led_classdev mail_led = {
.name = "acer-wmi::mail",
.brightness_set = mail_led_set,
};
static int __devinit acer_led_init(struct device *dev)
{
return led_classdev_register(dev, &mail_led);
}
static void acer_led_exit(void)
{
led_classdev_unregister(&mail_led);
}
/*
* Backlight device
*/
static struct backlight_device *acer_backlight_device;
static int read_brightness(struct backlight_device *bd)
{
u32 value;
get_u32(&value, ACER_CAP_BRIGHTNESS);
return value;
}
static int update_bl_status(struct backlight_device *bd)
{
int intensity = bd->props.brightness;
if (bd->props.power != FB_BLANK_UNBLANK)
intensity = 0;
if (bd->props.fb_blank != FB_BLANK_UNBLANK)
intensity = 0;
set_u32(intensity, ACER_CAP_BRIGHTNESS);
return 0;
}
static struct backlight_ops acer_bl_ops = {
.get_brightness = read_brightness,
.update_status = update_bl_status,
};
static int __devinit acer_backlight_init(struct device *dev)
{
struct backlight_device *bd;
bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops);
if (IS_ERR(bd)) {
printk(ACER_ERR "Could not register Acer backlight device\n");
acer_backlight_device = NULL;
return PTR_ERR(bd);
}
acer_backlight_device = bd;
bd->props.power = FB_BLANK_UNBLANK;
bd->props.brightness = max_brightness;
bd->props.max_brightness = max_brightness;
backlight_update_status(bd);
return 0;
}
static void acer_backlight_exit(void)
{
backlight_device_unregister(acer_backlight_device);
}
/*
* Read/ write bool sysfs macro
*/
#define show_set_bool(value, cap) \
static ssize_t \
show_bool_##value(struct device *dev, struct device_attribute *attr, \
char *buf) \
{ \
u32 result; \
acpi_status status = get_u32(&result, cap); \
if (ACPI_SUCCESS(status)) \
return sprintf(buf, "%u\n", result); \
return sprintf(buf, "Read error\n"); \
} \
\
static ssize_t \
set_bool_##value(struct device *dev, struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
u32 tmp = simple_strtoul(buf, NULL, 10); \
acpi_status status = set_u32(tmp, cap); \
if (ACPI_FAILURE(status)) \
return -EINVAL; \
return count; \
} \
static DEVICE_ATTR(value, S_IWUGO | S_IRUGO | S_IWUSR, \
show_bool_##value, set_bool_##value);
show_set_bool(wireless, ACER_CAP_WIRELESS);
show_set_bool(bluetooth, ACER_CAP_BLUETOOTH);
show_set_bool(threeg, ACER_CAP_THREEG);
/*
* Read interface sysfs macro
*/
static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
char *buf)
{
switch (interface->type) {
case ACER_AMW0:
return sprintf(buf, "AMW0\n");
case ACER_AMW0_V2:
return sprintf(buf, "AMW0 v2\n");
case ACER_WMID:
return sprintf(buf, "WMID\n");
default:
return sprintf(buf, "Error!\n");
}
}
static DEVICE_ATTR(interface, S_IWUGO | S_IRUGO | S_IWUSR,
show_interface, NULL);
/*
* debugfs functions
*/
static u32 get_wmid_devices(void)
{
struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
union acpi_object *obj;
acpi_status status;
status = wmi_query_block(WMID_GUID2, 1, &out);
if (ACPI_FAILURE(status))
return 0;
obj = (union acpi_object *) out.pointer;
if (obj && obj->type == ACPI_TYPE_BUFFER &&
obj->buffer.length == sizeof(u32)) {
return *((u32 *) obj->buffer.pointer);
} else {
return 0;
}
}
/*
* Platform device
*/
static int __devinit acer_platform_probe(struct platform_device *device)
{
int err;
if (has_cap(ACER_CAP_MAILLED)) {
err = acer_led_init(&device->dev);
if (err)
goto error_mailled;
}
if (has_cap(ACER_CAP_BRIGHTNESS)) {
err = acer_backlight_init(&device->dev);
if (err)
goto error_brightness;
}
return 0;
error_brightness:
acer_led_exit();
error_mailled:
return err;
}
static int acer_platform_remove(struct platform_device *device)
{
if (has_cap(ACER_CAP_MAILLED))
acer_led_exit();
if (has_cap(ACER_CAP_BRIGHTNESS))
acer_backlight_exit();
return 0;
}
static int acer_platform_suspend(struct platform_device *dev,
pm_message_t state)
{
u32 value;
struct acer_data *data = &interface->data;
if (!data)
return -ENOMEM;
if (has_cap(ACER_CAP_WIRELESS)) {
get_u32(&value, ACER_CAP_WIRELESS);
data->wireless = value;
}
if (has_cap(ACER_CAP_BLUETOOTH)) {
get_u32(&value, ACER_CAP_BLUETOOTH);
data->bluetooth = value;
}
if (has_cap(ACER_CAP_MAILLED)) {
get_u32(&value, ACER_CAP_MAILLED);
data->mailled = value;
}
if (has_cap(ACER_CAP_BRIGHTNESS)) {
get_u32(&value, ACER_CAP_BRIGHTNESS);
data->brightness = value;
}
return 0;
}
static int acer_platform_resume(struct platform_device *device)
{
struct acer_data *data = &interface->data;
if (!data)
return -ENOMEM;
if (has_cap(ACER_CAP_WIRELESS))
set_u32(data->wireless, ACER_CAP_WIRELESS);
if (has_cap(ACER_CAP_BLUETOOTH))
set_u32(data->bluetooth, ACER_CAP_BLUETOOTH);
if (has_cap(ACER_CAP_THREEG))
set_u32(data->threeg, ACER_CAP_THREEG);
if (has_cap(ACER_CAP_MAILLED))
set_u32(data->mailled, ACER_CAP_MAILLED);
if (has_cap(ACER_CAP_BRIGHTNESS))
set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
return 0;
}
static struct platform_driver acer_platform_driver = {
.driver = {
.name = "acer-wmi",
.owner = THIS_MODULE,
},
.probe = acer_platform_probe,
.remove = acer_platform_remove,
.suspend = acer_platform_suspend,
.resume = acer_platform_resume,
};
static struct platform_device *acer_platform_device;
static int remove_sysfs(struct platform_device *device)
{
if (has_cap(ACER_CAP_WIRELESS))
device_remove_file(&device->dev, &dev_attr_wireless);
if (has_cap(ACER_CAP_BLUETOOTH))
device_remove_file(&device->dev, &dev_attr_bluetooth);
if (has_cap(ACER_CAP_THREEG))
device_remove_file(&device->dev, &dev_attr_threeg);
device_remove_file(&device->dev, &dev_attr_interface);
return 0;
}
static int create_sysfs(void)
{
int retval = -ENOMEM;
if (has_cap(ACER_CAP_WIRELESS)) {
retval = device_create_file(&acer_platform_device->dev,
&dev_attr_wireless);
if (retval)
goto error_sysfs;
}
if (has_cap(ACER_CAP_BLUETOOTH)) {
retval = device_create_file(&acer_platform_device->dev,
&dev_attr_bluetooth);
if (retval)
goto error_sysfs;
}
if (has_cap(ACER_CAP_THREEG)) {
retval = device_create_file(&acer_platform_device->dev,
&dev_attr_threeg);
if (retval)
goto error_sysfs;
}
retval = device_create_file(&acer_platform_device->dev,
&dev_attr_interface);
if (retval)
goto error_sysfs;
return 0;
error_sysfs:
remove_sysfs(acer_platform_device);
return retval;
}
static void remove_debugfs(void)
{
debugfs_remove(interface->debug.devices);
debugfs_remove(interface->debug.root);
}
static int create_debugfs(void)
{
interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
if (!interface->debug.root) {
printk(ACER_ERR "Failed to create debugfs directory");
return -ENOMEM;
}
interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
interface->debug.root,
&interface->debug.wmid_devices);
if (!interface->debug.devices)
goto error_debugfs;
return 0;
error_debugfs:
remove_debugfs();
return -ENOMEM;
}
static int __init acer_wmi_init(void)
{
int err;
printk(ACER_INFO "Acer Laptop ACPI-WMI Extras\n");
find_quirks();
/*
* Detect which ACPI-WMI interface we're using.
*/
if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
interface = &AMW0_V2_interface;
if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
interface = &wmid_interface;
if (wmi_has_guid(WMID_GUID2) && interface) {
if (ACPI_FAILURE(WMID_set_capabilities())) {
printk(ACER_ERR "Unable to detect available WMID "
"devices\n");
return -ENODEV;
}
} else if (!wmi_has_guid(WMID_GUID2) && interface) {
printk(ACER_ERR "No WMID device detection method found\n");
return -ENODEV;
}
if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
interface = &AMW0_interface;
if (ACPI_FAILURE(AMW0_set_capabilities())) {
printk(ACER_ERR "Unable to detect available AMW0 "
"devices\n");
return -ENODEV;
}
}
if (wmi_has_guid(AMW0_GUID1))
AMW0_find_mailled();
if (!interface) {
printk(ACER_ERR "No or unsupported WMI interface, unable to "
"load\n");
return -ENODEV;
}
if (platform_driver_register(&acer_platform_driver)) {
printk(ACER_ERR "Unable to register platform driver.\n");
goto error_platform_register;
}
acer_platform_device = platform_device_alloc("acer-wmi", -1);
platform_device_add(acer_platform_device);
err = create_sysfs();
if (err)
return err;
if (wmi_has_guid(WMID_GUID2)) {
interface->debug.wmid_devices = get_wmid_devices();
err = create_debugfs();
if (err)
return err;
}
/* Override any initial settings with values from the commandline */
acer_commandline_init();
return 0;
error_platform_register:
return -ENODEV;
}
static void __exit acer_wmi_exit(void)
{
remove_sysfs(acer_platform_device);
platform_device_del(acer_platform_device);
platform_driver_unregister(&acer_platform_driver);
printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
return;
}
module_init(acer_wmi_init);
module_exit(acer_wmi_exit);
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