// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for Dell laptop extras
*
* Copyright ( c ) Red Hat < mjg @ redhat . com >
* Copyright ( c ) 2014 Gabriele Mazzotta < gabriele . mzt @ gmail . com >
* Copyright ( c ) 2014 Pali Roh á r < pali @ kernel . org >
*
* Based on documentation in the libsmbios package :
* Copyright ( C ) 2005 - 2014 Dell Inc .
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/backlight.h>
#include <linux/err.h>
#include <linux/dmi.h>
#include <linux/io.h>
#include <linux/rfkill.h>
#include <linux/power_supply.h>
#include <linux/sysfs.h>
#include <linux/acpi.h>
#include <linux/mm.h>
#include <linux/i8042.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <acpi/battery.h>
#include <acpi/video.h>
#include "dell-rbtn.h"
#include "dell-smbios.h"
#include "dell-wmi-privacy.h"
struct quirk_entry {
bool touchpad_led;
bool kbd_led_not_present;
bool kbd_led_levels_off_1;
bool kbd_missing_ac_tag;
bool needs_kbd_timeouts;
/*
* Ordered list of timeouts expressed in seconds .
* The list must end with - 1
*/
int kbd_timeouts[];
};
static struct quirk_entry *quirks;
static struct quirk_entry quirk_dell_vostro_v130 = {
.touchpad_led = true ,
};
static int __init dmi_matched(const struct dmi_system_id *dmi)
{
quirks = dmi->driver_data;
return 1 ;
}
/*
* These values come from Windows utility provided by Dell . If any other value
* is used then BIOS silently set timeout to 0 without any error message .
*/
static struct quirk_entry quirk_dell_xps13_9333 = {
.needs_kbd_timeouts = true ,
.kbd_timeouts = { 0 , 5 , 15 , 60 , 5 * 60 , 15 * 60 , -1 },
};
static struct quirk_entry quirk_dell_xps13_9370 = {
.kbd_missing_ac_tag = true ,
};
static struct quirk_entry quirk_dell_latitude_e6410 = {
.kbd_led_levels_off_1 = true ,
};
static struct quirk_entry quirk_dell_inspiron_1012 = {
.kbd_led_not_present = true ,
};
static struct quirk_entry quirk_dell_latitude_7520 = {
.kbd_missing_ac_tag = true ,
};
static struct platform_driver platform_driver = {
.driver = {
.name = "dell-laptop" ,
}
};
static struct platform_device *platform_device;
static struct backlight_device *dell_backlight_device;
static struct rfkill *wifi_rfkill;
static struct rfkill *bluetooth_rfkill;
static struct rfkill *wwan_rfkill;
static bool force_rfkill;
static bool micmute_led_registered;
static bool mute_led_registered;
struct battery_mode_info {
int token;
enum power_supply_charge_type charge_type;
};
static const struct battery_mode_info battery_modes[] = {
{ BAT_PRI_AC_MODE_TOKEN, POWER_SUPPLY_CHARGE_TYPE_TRICKLE },
{ BAT_EXPRESS_MODE_TOKEN, POWER_SUPPLY_CHARGE_TYPE_FAST },
{ BAT_STANDARD_MODE_TOKEN, POWER_SUPPLY_CHARGE_TYPE_STANDARD },
{ BAT_ADAPTIVE_MODE_TOKEN, POWER_SUPPLY_CHARGE_TYPE_ADAPTIVE },
{ BAT_CUSTOM_MODE_TOKEN, POWER_SUPPLY_CHARGE_TYPE_CUSTOM },
};
static u32 battery_supported_modes;
module_param(force_rfkill, bool , 0444 );
MODULE_PARM_DESC(force_rfkill, "enable rfkill on non whitelisted models" );
static const struct dmi_system_id dell_device_table[] __initconst = {
{
.ident = "Dell laptop" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_CHASSIS_TYPE, "8" ),
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_CHASSIS_TYPE, "9" ), /*Laptop*/
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_CHASSIS_TYPE, "10" ), /*Notebook*/
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_CHASSIS_TYPE, "30" ), /*Tablet*/
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_CHASSIS_TYPE, "31" ), /*Convertible*/
},
},
{
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_CHASSIS_TYPE, "32" ), /*Detachable*/
},
},
{
.ident = "Dell Computer Corporation" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation" ),
DMI_MATCH(DMI_CHASSIS_TYPE, "8" ),
},
},
{ }
};
MODULE_DEVICE_TABLE(dmi, dell_device_table);
static const struct dmi_system_id dell_quirks[] __initconst = {
{
.callback = dmi_matched,
.ident = "Dell Vostro V130" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V130" ),
},
.driver_data = &quirk_dell_vostro_v130,
},
{
.callback = dmi_matched,
.ident = "Dell Vostro V131" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131" ),
},
.driver_data = &quirk_dell_vostro_v130,
},
{
.callback = dmi_matched,
.ident = "Dell Vostro 3350" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3350" ),
},
.driver_data = &quirk_dell_vostro_v130,
},
{
.callback = dmi_matched,
.ident = "Dell Vostro 3555" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3555" ),
},
.driver_data = &quirk_dell_vostro_v130,
},
{
.callback = dmi_matched,
.ident = "Dell Inspiron N311z" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N311z" ),
},
.driver_data = &quirk_dell_vostro_v130,
},
{
.callback = dmi_matched,
.ident = "Dell Inspiron M5110" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron M5110" ),
},
.driver_data = &quirk_dell_vostro_v130,
},
{
.callback = dmi_matched,
.ident = "Dell Vostro 3360" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3360" ),
},
.driver_data = &quirk_dell_vostro_v130,
},
{
.callback = dmi_matched,
.ident = "Dell Vostro 3460" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3460" ),
},
.driver_data = &quirk_dell_vostro_v130,
},
{
.callback = dmi_matched,
.ident = "Dell Vostro 3560" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3560" ),
},
.driver_data = &quirk_dell_vostro_v130,
},
{
.callback = dmi_matched,
.ident = "Dell Vostro 3450" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Dell System Vostro 3450" ),
},
.driver_data = &quirk_dell_vostro_v130,
},
{
.callback = dmi_matched,
.ident = "Dell Inspiron 5420" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5420" ),
},
.driver_data = &quirk_dell_vostro_v130,
},
{
.callback = dmi_matched,
.ident = "Dell Inspiron 5520" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5520" ),
},
.driver_data = &quirk_dell_vostro_v130,
},
{
.callback = dmi_matched,
.ident = "Dell Inspiron 5720" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5720" ),
},
.driver_data = &quirk_dell_vostro_v130,
},
{
.callback = dmi_matched,
.ident = "Dell Inspiron 7420" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7420" ),
},
.driver_data = &quirk_dell_vostro_v130,
},
{
.callback = dmi_matched,
.ident = "Dell Inspiron 7520" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7520" ),
},
.driver_data = &quirk_dell_vostro_v130,
},
{
.callback = dmi_matched,
.ident = "Dell Inspiron 7720" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7720" ),
},
.driver_data = &quirk_dell_vostro_v130,
},
{
.callback = dmi_matched,
.ident = "Dell XPS13 9333" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "XPS13 9333" ),
},
.driver_data = &quirk_dell_xps13_9333,
},
{
.callback = dmi_matched,
.ident = "Dell XPS 13 9370" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9370" ),
},
.driver_data = &quirk_dell_xps13_9370,
},
{
.callback = dmi_matched,
.ident = "Dell Latitude E6410" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6410" ),
},
.driver_data = &quirk_dell_latitude_e6410,
},
{
.callback = dmi_matched,
.ident = "Dell Inspiron 1012" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012" ),
},
.driver_data = &quirk_dell_inspiron_1012,
},
{
.callback = dmi_matched,
.ident = "Dell Inspiron 1018" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1018" ),
},
.driver_data = &quirk_dell_inspiron_1012,
},
{
.callback = dmi_matched,
.ident = "Dell Latitude 7520" ,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc." ),
DMI_MATCH(DMI_PRODUCT_NAME, "Latitude 7520" ),
},
.driver_data = &quirk_dell_latitude_7520,
},
{ }
};
/* -1 is a sentinel value, telling us to use token->value */
#define USE_TVAL ((u32) -1 )
static int dell_send_request_for_tokenid(struct calling_interface_buffer *buffer,
u16 class , u16 select, u16 tokenid,
u32 val)
{
struct calling_interface_token *token;
token = dell_smbios_find_token(tokenid);
if (!token)
return -ENODEV;
if (val == USE_TVAL)
val = token->value;
dell_fill_request(buffer, token->location, val, 0 , 0 );
return dell_send_request(buffer, class , select);
}
static inline int dell_set_std_token_value(struct calling_interface_buffer *buffer,
u16 tokenid, u32 value)
{
return dell_send_request_for_tokenid(buffer, CLASS_TOKEN_WRITE,
SELECT_TOKEN_STD, tokenid, value);
}
/*
* Derived from information in smbios - wireless - ctl :
*
* cbSelect 17 , Value 11
*
* Return Wireless Info
* cbArg1 , byte0 = 0 x00
*
* cbRes1 Standard return codes ( 0 , - 1 , - 2 )
* cbRes2 Info bit flags :
*
* 0 Hardware switch supported ( 1 )
* 1 WiFi locator supported ( 1 )
* 2 WLAN supported ( 1 )
* 3 Bluetooth ( BT ) supported ( 1 )
* 4 WWAN supported ( 1 )
* 5 Wireless KBD supported ( 1 )
* 6 Uw b supported ( 1 )
* 7 WiGig supported ( 1 )
* 8 WLAN installed ( 1 )
* 9 BT installed ( 1 )
* 10 WWAN installed ( 1 )
* 11 Uw b installed ( 1 )
* 12 WiGig installed ( 1 )
* 13 - 15 Reserved ( 0 )
* 16 Hardware ( HW ) switch is On ( 1 )
* 17 WLAN disabled ( 1 )
* 18 BT disabled ( 1 )
* 19 WWAN disabled ( 1 )
* 20 Uw b disabled ( 1 )
* 21 WiGig disabled ( 1 )
* 20 - 31 Reserved ( 0 )
*
* cbRes3 NVRAM size in bytes
* cbRes4 , byte 0 NVRAM format version number
*
*
* Set QuickSet Radio Disable Flag
* cbArg1 , byte0 = 0 x01
* cbArg1 , byte1
* Radio ID value :
* 0 Radio Status
* 1 WLAN ID
* 2 BT ID
* 3 WWAN ID
* 4 UWB ID
* 5 WIGIG ID
* cbArg1 , byte2 Flag bits :
* 0 QuickSet disables radio ( 1 )
* 1 - 7 Reserved ( 0 )
*
* cbRes1 Standard return codes ( 0 , - 1 , - 2 )
* cbRes2 QuickSet ( QS ) radio disable bit map :
* 0 QS disables WLAN
* 1 QS disables BT
* 2 QS disables WWAN
* 3 QS disables UWB
* 4 QS disables WIGIG
* 5 - 31 Reserved ( 0 )
*
* Wireless Switch Configuration
* cbArg1 , byte0 = 0 x02
*
* cbArg1 , byte1
* Subcommand :
* 0 Get config
* 1 Set config
* 2 Set WiFi locator enable / disable
* cbArg1 , byte2
* Switch settings ( if byte 1 = = 1 ) :
* 0 WLAN sw itch control ( 1 )
* 1 BT sw itch control ( 1 )
* 2 WWAN sw itch control ( 1 )
* 3 UWB sw itch control ( 1 )
* 4 WiGig sw itch control ( 1 )
* 5 - 7 Reserved ( 0 )
* cbArg1 , byte2 Enable bits ( if byte 1 = = 2 ) :
* 0 Enable WiFi locator ( 1 )
*
* cbRes1 Standard return codes ( 0 , - 1 , - 2 )
* cbRes2 QuickSet radio disable bit map :
* 0 WLAN controlled by sw itch ( 1 )
* 1 BT controlled by sw itch ( 1 )
* 2 WWAN controlled by sw itch ( 1 )
* 3 UWB controlled by sw itch ( 1 )
* 4 WiGig controlled by sw itch ( 1 )
* 5 - 6 Reserved ( 0 )
* 7 Wireless sw itch config locked ( 1 )
* 8 WiFi locator enabled ( 1 )
* 9 - 14 Reserved ( 0 )
* 15 WiFi locator setting locked ( 1 )
* 16 - 31 Reserved ( 0 )
*
* Read Local Config Data ( LCD )
* cbArg1 , byte0 = 0 x10
* cbArg1 , byte1 NVRAM index low byte
* cbArg1 , byte2 NVRAM index high byte
* cbRes1 Standard return codes ( 0 , - 1 , - 2 )
* cbRes2 4 bytes read from LCD [ index ]
* cbRes3 4 bytes read from LCD [ index + 4 ]
* cbRes4 4 bytes read from LCD [ index + 8 ]
*
* Write Local Config Data ( LCD )
* cbArg1 , byte0 = 0 x11
* cbArg1 , byte1 NVRAM index low byte
* cbArg1 , byte2 NVRAM index high byte
* cbArg2 4 bytes to w rite at LCD [ index ]
* cbArg3 4 bytes to w rite at LCD [ index + 4 ]
* cbArg4 4 bytes to w rite at LCD [ index + 8 ]
* cbRes1 Standard return codes ( 0 , - 1 , - 2 )
*
* Populate Local Config Data from NVRAM
* cbArg1 , byte0 = 0 x12
* cbRes1 Standard return codes ( 0 , - 1 , - 2 )
*
* Commit Local Config Data to NVRAM
* cbArg1 , byte0 = 0 x13
* cbRes1 Standard return codes ( 0 , - 1 , - 2 )
*/
static int dell_rfkill_set(void *data, bool blocked)
{
int disable = blocked ? 1 : 0 ;
unsigned long radio = (unsigned long )data;
int hwswitch_bit = (unsigned long )data - 1 ;
struct calling_interface_buffer buffer;
int hwswitch;
int status;
int ret;
dell_fill_request(&buffer, 0 , 0 , 0 , 0 );
ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
if (ret)
return ret;
status = buffer.output[1 ];
dell_fill_request(&buffer, 0 x2, 0 , 0 , 0 );
ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
if (ret)
return ret;
hwswitch = buffer.output[1 ];
/* If the hardware switch controls this radio, and the hardware
switch is disabled, always disable the radio */
if (ret == 0 && (hwswitch & BIT(hwswitch_bit)) &&
(status & BIT(0 )) && !(status & BIT(16 )))
disable = 1 ;
dell_fill_request(&buffer, 1 | (radio<<8 ) | (disable << 16 ), 0 , 0 , 0 );
ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
return ret;
}
static void dell_rfkill_update_sw_state(struct rfkill *rfkill, int radio,
int status)
{
if (status & BIT(0 )) {
/* Has hw-switch, sync sw_state to BIOS */
struct calling_interface_buffer buffer;
int block = rfkill_blocked(rfkill);
dell_fill_request(&buffer,
1 | (radio << 8 ) | (block << 16 ), 0 , 0 , 0 );
dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
} else {
/* No hw-switch, sync BIOS state to sw_state */
rfkill_set_sw_state(rfkill, !!(status & BIT(radio + 16 )));
}
}
static void dell_rfkill_update_hw_state(struct rfkill *rfkill, int radio,
int status, int hwswitch)
{
if (hwswitch & (BIT(radio - 1 )))
rfkill_set_hw_state(rfkill, !(status & BIT(16 )));
}
static void dell_rfkill_query(struct rfkill *rfkill, void *data)
{
int radio = ((unsigned long )data & 0 xF);
struct calling_interface_buffer buffer;
int hwswitch;
int status;
int ret;
dell_fill_request(&buffer, 0 , 0 , 0 , 0 );
ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
status = buffer.output[1 ];
if (ret != 0 || !(status & BIT(0 ))) {
return ;
}
dell_fill_request(&buffer, 0 x2, 0 , 0 , 0 );
ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
hwswitch = buffer.output[1 ];
if (ret != 0 )
return ;
dell_rfkill_update_hw_state(rfkill, radio, status, hwswitch);
}
static const struct rfkill_ops dell_rfkill_ops = {
.set_block = dell_rfkill_set,
.query = dell_rfkill_query,
};
static struct dentry *dell_laptop_dir;
static int dell_debugfs_show(struct seq_file *s, void *data)
{
struct calling_interface_buffer buffer;
int hwswitch_state;
int hwswitch_ret;
int status;
int ret;
dell_fill_request(&buffer, 0 , 0 , 0 , 0 );
ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
if (ret)
return ret;
status = buffer.output[1 ];
dell_fill_request(&buffer, 0 x2, 0 , 0 , 0 );
hwswitch_ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
if (hwswitch_ret)
return hwswitch_ret;
hwswitch_state = buffer.output[1 ];
seq_printf(s, "return:\t%d\n" , ret);
seq_printf(s, "status:\t0x%X\n" , status);
seq_printf(s, "Bit 0 : Hardware switch supported: %lu\n" ,
status & BIT(0 ));
seq_printf(s, "Bit 1 : Wifi locator supported: %lu\n" ,
(status & BIT(1 )) >> 1 );
seq_printf(s, "Bit 2 : Wifi is supported: %lu\n" ,
(status & BIT(2 )) >> 2 );
seq_printf(s, "Bit 3 : Bluetooth is supported: %lu\n" ,
(status & BIT(3 )) >> 3 );
seq_printf(s, "Bit 4 : WWAN is supported: %lu\n" ,
(status & BIT(4 )) >> 4 );
seq_printf(s, "Bit 5 : Wireless keyboard supported: %lu\n" ,
(status & BIT(5 )) >> 5 );
seq_printf(s, "Bit 6 : UWB supported: %lu\n" ,
(status & BIT(6 )) >> 6 );
seq_printf(s, "Bit 7 : WiGig supported: %lu\n" ,
(status & BIT(7 )) >> 7 );
seq_printf(s, "Bit 8 : Wifi is installed: %lu\n" ,
(status & BIT(8 )) >> 8 );
seq_printf(s, "Bit 9 : Bluetooth is installed: %lu\n" ,
(status & BIT(9 )) >> 9 );
seq_printf(s, "Bit 10: WWAN is installed: %lu\n" ,
(status & BIT(10 )) >> 10 );
seq_printf(s, "Bit 11: UWB installed: %lu\n" ,
(status & BIT(11 )) >> 11 );
seq_printf(s, "Bit 12: WiGig installed: %lu\n" ,
(status & BIT(12 )) >> 12 );
seq_printf(s, "Bit 16: Hardware switch is on: %lu\n" ,
(status & BIT(16 )) >> 16 );
seq_printf(s, "Bit 17: Wifi is blocked: %lu\n" ,
(status & BIT(17 )) >> 17 );
seq_printf(s, "Bit 18: Bluetooth is blocked: %lu\n" ,
(status & BIT(18 )) >> 18 );
seq_printf(s, "Bit 19: WWAN is blocked: %lu\n" ,
(status & BIT(19 )) >> 19 );
seq_printf(s, "Bit 20: UWB is blocked: %lu\n" ,
(status & BIT(20 )) >> 20 );
seq_printf(s, "Bit 21: WiGig is blocked: %lu\n" ,
(status & BIT(21 )) >> 21 );
seq_printf(s, "\nhwswitch_return:\t%d\n" , hwswitch_ret);
seq_printf(s, "hwswitch_state:\t0x%X\n" , hwswitch_state);
seq_printf(s, "Bit 0 : Wifi controlled by switch: %lu\n" ,
hwswitch_state & BIT(0 ));
seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n" ,
(hwswitch_state & BIT(1 )) >> 1 );
seq_printf(s, "Bit 2 : WWAN controlled by switch: %lu\n" ,
(hwswitch_state & BIT(2 )) >> 2 );
seq_printf(s, "Bit 3 : UWB controlled by switch: %lu\n" ,
(hwswitch_state & BIT(3 )) >> 3 );
seq_printf(s, "Bit 4 : WiGig controlled by switch: %lu\n" ,
(hwswitch_state & BIT(4 )) >> 4 );
seq_printf(s, "Bit 7 : Wireless switch config locked: %lu\n" ,
(hwswitch_state & BIT(7 )) >> 7 );
seq_printf(s, "Bit 8 : Wifi locator enabled: %lu\n" ,
(hwswitch_state & BIT(8 )) >> 8 );
seq_printf(s, "Bit 15: Wifi locator setting locked: %lu\n" ,
(hwswitch_state & BIT(15 )) >> 15 );
return 0 ;
}
DEFINE_SHOW_ATTRIBUTE(dell_debugfs);
static void dell_update_rfkill(struct work_struct *ignored)
{
struct calling_interface_buffer buffer;
int hwswitch = 0 ;
int status;
int ret;
dell_fill_request(&buffer, 0 , 0 , 0 , 0 );
ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
status = buffer.output[1 ];
if (ret != 0 )
return ;
dell_fill_request(&buffer, 0 x2, 0 , 0 , 0 );
ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
if (ret == 0 && (status & BIT(0 )))
hwswitch = buffer.output[1 ];
if (wifi_rfkill) {
dell_rfkill_update_hw_state(wifi_rfkill, 1 , status, hwswitch);
dell_rfkill_update_sw_state(wifi_rfkill, 1 , status);
}
if (bluetooth_rfkill) {
dell_rfkill_update_hw_state(bluetooth_rfkill, 2 , status,
hwswitch);
dell_rfkill_update_sw_state(bluetooth_rfkill, 2 , status);
}
if (wwan_rfkill) {
dell_rfkill_update_hw_state(wwan_rfkill, 3 , status, hwswitch);
dell_rfkill_update_sw_state(wwan_rfkill, 3 , status);
}
}
static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill);
static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str, struct serio *port,
void *context)
{
static bool extended;
if (str & I8042_STR_AUXDATA)
return false ;
if (unlikely(data == 0 xe0)) {
extended = true ;
return false ;
} else if (unlikely(extended)) {
switch (data) {
case 0 x8:
schedule_delayed_work(&dell_rfkill_work,
round_jiffies_relative(HZ / 4 ));
break ;
}
extended = false ;
}
return false ;
}
static int (*dell_rbtn_notifier_register_func)(struct notifier_block *);
static int (*dell_rbtn_notifier_unregister_func)(struct notifier_block *);
static int dell_laptop_rbtn_notifier_call(struct notifier_block *nb,
unsigned long action, void *data)
{
schedule_delayed_work(&dell_rfkill_work, 0 );
return NOTIFY_OK;
}
static struct notifier_block dell_laptop_rbtn_notifier = {
.notifier_call = dell_laptop_rbtn_notifier_call,
};
static int __init dell_setup_rfkill(void )
{
struct calling_interface_buffer buffer;
int status, ret, whitelisted;
const char *product;
/*
* rfkill support causes trouble on various models , mostly Inspirons .
* So we whitelist certain series , and don ' t support rfkill on others .
*/
whitelisted = 0 ;
product = dmi_get_system_info(DMI_PRODUCT_NAME);
if (product && (strncmp(product, "Latitude" , 8 ) == 0 ||
strncmp(product, "Precision" , 9 ) == 0 ))
whitelisted = 1 ;
if (!force_rfkill && !whitelisted)
return 0 ;
dell_fill_request(&buffer, 0 , 0 , 0 , 0 );
ret = dell_send_request(&buffer, CLASS_INFO, SELECT_RFKILL);
status = buffer.output[1 ];
/* dell wireless info smbios call is not supported */
if (ret != 0 )
return 0 ;
/* rfkill is only tested on laptops with a hwswitch */
if (!(status & BIT(0 )) && !force_rfkill)
return 0 ;
if ((status & (1 <<2 |1 <<8 )) == (1 <<2 |1 <<8 )) {
wifi_rfkill = rfkill_alloc("dell-wifi" , &platform_device->dev,
RFKILL_TYPE_WLAN,
&dell_rfkill_ops, (void *) 1 );
if (!wifi_rfkill) {
ret = -ENOMEM;
goto err_wifi;
}
ret = rfkill_register(wifi_rfkill);
if (ret)
goto err_wifi;
}
if ((status & (1 <<3 |1 <<9 )) == (1 <<3 |1 <<9 )) {
bluetooth_rfkill = rfkill_alloc("dell-bluetooth" ,
&platform_device->dev,
RFKILL_TYPE_BLUETOOTH,
&dell_rfkill_ops, (void *) 2 );
if (!bluetooth_rfkill) {
ret = -ENOMEM;
goto err_bluetooth;
}
ret = rfkill_register(bluetooth_rfkill);
if (ret)
goto err_bluetooth;
}
if ((status & (1 <<4 |1 <<10 )) == (1 <<4 |1 <<10 )) {
wwan_rfkill = rfkill_alloc("dell-wwan" ,
&platform_device->dev,
RFKILL_TYPE_WWAN,
&dell_rfkill_ops, (void *) 3 );
if (!wwan_rfkill) {
ret = -ENOMEM;
goto err_wwan;
}
ret = rfkill_register(wwan_rfkill);
if (ret)
goto err_wwan;
}
/*
* Dell Airplane Mode Switch driver ( dell - rbtn ) supports ACPI devices
* which can receive events from HW slider switch .
*
* Dell SMBIOS on whitelisted models supports controlling radio devices
* but does not support receiving HW button switch events . We can use
* i8042 filter hook function to receive keyboard data and handle
* keycode for HW button .
*
* So if it is possible we will use Dell Airplane Mode Switch ACPI
* driver for receiving HW events and Dell SMBIOS for setting rfkill
* states . If ACPI driver or device is not available we will fallback to
* i8042 filter hook function .
*
* To prevent duplicate rfkill devices which control and do same thing ,
* dell - rbtn driver will automatically remove its own rfkill devices
* once function dell_rbtn_notifier_register ( ) is called .
*/
dell_rbtn_notifier_register_func =
symbol_request(dell_rbtn_notifier_register);
if (dell_rbtn_notifier_register_func) {
dell_rbtn_notifier_unregister_func =
symbol_request(dell_rbtn_notifier_unregister);
if (!dell_rbtn_notifier_unregister_func) {
symbol_put(dell_rbtn_notifier_register);
dell_rbtn_notifier_register_func = NULL;
}
}
if (dell_rbtn_notifier_register_func) {
ret = dell_rbtn_notifier_register_func(
&dell_laptop_rbtn_notifier);
symbol_put(dell_rbtn_notifier_register);
dell_rbtn_notifier_register_func = NULL;
if (ret != 0 ) {
symbol_put(dell_rbtn_notifier_unregister);
dell_rbtn_notifier_unregister_func = NULL;
}
} else {
pr_info("Symbols from dell-rbtn acpi driver are not available\n" );
ret = -ENODEV;
}
if (ret == 0 ) {
pr_info("Using dell-rbtn acpi driver for receiving events\n" );
} else if (ret != -ENODEV) {
pr_warn("Unable to register dell rbtn notifier\n" );
goto err_filter;
} else {
ret = i8042_install_filter(dell_laptop_i8042_filter, NULL);
if (ret) {
pr_warn("Unable to install key filter\n" );
goto err_filter;
}
pr_info("Using i8042 filter function for receiving events\n" );
}
return 0 ;
err_filter:
if (wwan_rfkill)
rfkill_unregister(wwan_rfkill);
err_wwan:
rfkill_destroy(wwan_rfkill);
if (bluetooth_rfkill)
rfkill_unregister(bluetooth_rfkill);
err_bluetooth:
rfkill_destroy(bluetooth_rfkill);
if (wifi_rfkill)
rfkill_unregister(wifi_rfkill);
err_wifi:
rfkill_destroy(wifi_rfkill);
return ret;
}
static void dell_cleanup_rfkill(void )
{
if (dell_rbtn_notifier_unregister_func) {
dell_rbtn_notifier_unregister_func(&dell_laptop_rbtn_notifier);
symbol_put(dell_rbtn_notifier_unregister);
dell_rbtn_notifier_unregister_func = NULL;
} else {
i8042_remove_filter(dell_laptop_i8042_filter);
}
cancel_delayed_work_sync(&dell_rfkill_work);
if (wifi_rfkill) {
rfkill_unregister(wifi_rfkill);
rfkill_destroy(wifi_rfkill);
}
if (bluetooth_rfkill) {
rfkill_unregister(bluetooth_rfkill);
rfkill_destroy(bluetooth_rfkill);
}
if (wwan_rfkill) {
rfkill_unregister(wwan_rfkill);
rfkill_destroy(wwan_rfkill);
}
}
static int dell_send_intensity(struct backlight_device *bd)
{
struct calling_interface_buffer buffer;
u16 select;
select = power_supply_is_system_supplied() > 0 ?
SELECT_TOKEN_AC : SELECT_TOKEN_BAT;
return dell_send_request_for_tokenid(&buffer, CLASS_TOKEN_WRITE,
select, BRIGHTNESS_TOKEN, bd->props.brightness);
}
static int dell_get_intensity(struct backlight_device *bd)
{
struct calling_interface_buffer buffer;
int ret;
u16 select;
select = power_supply_is_system_supplied() > 0 ?
SELECT_TOKEN_AC : SELECT_TOKEN_BAT;
ret = dell_send_request_for_tokenid(&buffer, CLASS_TOKEN_READ,
select, BRIGHTNESS_TOKEN, 0 );
if (ret == 0 )
ret = buffer.output[1 ];
return ret;
}
static const struct backlight_ops dell_ops = {
.get_brightness = dell_get_intensity,
.update_status = dell_send_intensity,
};
static void touchpad_led_on(void )
{
int command = 0 x97;
char data = 1 ;
i8042_command(&data, command | 1 << 12 );
}
static void touchpad_led_off(void )
{
int command = 0 x97;
char data = 2 ;
i8042_command(&data, command | 1 << 12 );
}
static void touchpad_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
if (value > 0 )
touchpad_led_on();
else
touchpad_led_off();
}
static struct led_classdev touchpad_led = {
.name = "dell-laptop::touchpad" ,
.brightness_set = touchpad_led_set,
.flags = LED_CORE_SUSPENDRESUME,
};
static int __init touchpad_led_init(struct device *dev)
{
return led_classdev_register(dev, &touchpad_led);
}
static void touchpad_led_exit(void )
{
led_classdev_unregister(&touchpad_led);
}
/*
* Derived from information in smbios - keyboard - ctl :
*
* cbClass 4
* cbSelect 11
* Keyboard illumination
* cbArg1 determines the function to be performed
*
* cbArg1 0 x0 = Get Feature Information
* cbRES1 Standard return codes ( 0 , - 1 , - 2 )
* cbRES2 , word0 Bitmap of user - selectable modes
* bit 0 Always off ( All systems )
* bit 1 Always on ( Travis ATG , Siberia )
* bit 2 Auto : ALS - based On ; ALS - based Off ( Travis ATG )
* bit 3 Auto : ALS - and input - activity - based On ; input - activity based Off
* bit 4 Auto : Input - activity - based On ; input - activity based Off
* bit 5 Auto : Input - activity - based On ( illumination level 25 % ) ; input - activity based Off
* bit 6 Auto : Input - activity - based On ( illumination level 50 % ) ; input - activity based Off
* bit 7 Auto : Input - activity - based On ( illumination level 75 % ) ; input - activity based Off
* bit 8 Auto : Input - activity - based On ( illumination level 100 % ) ; input - activity based Off
* bits 9 - 15 Reserved for future use
* cbRES2 , byte2 Reserved for future use
* cbRES2 , byte3 Keyboard illumination type
* 0 Reserved
* 1 Tasklight
* 2 Backlight
* 3 - 255 Reserved for future use
* cbRES3 , byte0 Supported auto keyboard illumination trigger bitmap .
* bit 0 Any keystroke
* bit 1 Touchpad activity
* bit 2 Pointing stick
* bit 3 Any mouse
* bits 4 - 7 Reserved for future use
* cbRES3 , byte1 Supported timeout unit bitmap
* bit 0 Seconds
* bit 1 Minutes
* bit 2 Hours
* bit 3 Days
* bits 4 - 7 Reserved for future use
* cbRES3 , byte2 Number of keyboard light brightness levels
* cbRES4 , byte0 Maximum acceptable seconds value ( 0 if seconds not supported ) .
* cbRES4 , byte1 Maximum acceptable minutes value ( 0 if minutes not supported ) .
* cbRES4 , byte2 Maximum acceptable hours value ( 0 if hours not supported ) .
* cbRES4 , byte3 Maximum acceptable days value ( 0 if days not supported )
*
* cbArg1 0 x1 = Get Current State
* cbRES1 Standard return codes ( 0 , - 1 , - 2 )
* cbRES2 , word0 Bitmap of current mode state
* bit 0 Always off ( All systems )
* bit 1 Always on ( Travis ATG , Siberia )
* bit 2 Auto : ALS - based On ; ALS - based Off ( Travis ATG )
* bit 3 Auto : ALS - and input - activity - based On ; input - activity based Off
* bit 4 Auto : Input - activity - based On ; input - activity based Off
* bit 5 Auto : Input - activity - based On ( illumination level 25 % ) ; input - activity based Off
* bit 6 Auto : Input - activity - based On ( illumination level 50 % ) ; input - activity based Off
* bit 7 Auto : Input - activity - based On ( illumination level 75 % ) ; input - activity based Off
* bit 8 Auto : Input - activity - based On ( illumination level 100 % ) ; input - activity based Off
* bits 9 - 15 Reserved for future use
* Note : Only One bit can be set
* cbRES2 , byte2 Currently active auto keyboard illumination triggers .
* bit 0 Any keystroke
* bit 1 Touchpad activity
* bit 2 Pointing stick
* bit 3 Any mouse
* bits 4 - 7 Reserved for future use
* cbRES2 , byte3 Current Timeout on battery
* bits 7 : 6 Timeout units indicator :
* 00 b Seconds
* 01 b Minutes
* 10 b Hours
* 11 b Days
* bits 5 : 0 Timeout value ( 0 - 63 ) in sec / min / hr / day
* NOTE : A value of 0 means always on ( no timeout ) if any bits of RES3 byte
* are set upon return from the [ Get feature information ] call .
* cbRES3 , byte0 Current setting of ALS value that turns the light on or off .
* cbRES3 , byte1 Current ALS reading
* cbRES3 , byte2 Current keyboard light level .
* cbRES3 , byte3 Current timeout on AC Power
* bits 7 : 6 Timeout units indicator :
* 00 b Seconds
* 01 b Minutes
* 10 b Hours
* 11 b Days
* Bits 5 : 0 Timeout value ( 0 - 63 ) in sec / min / hr / day
* NOTE : A value of 0 means always on ( no timeout ) if any bits of RES3 byte2
* are set upon return from the upon return from the [ Get Feature information ] call .
*
* cbArg1 0 x2 = Set New State
* cbRES1 Standard return codes ( 0 , - 1 , - 2 )
* cbArg2 , word0 Bitmap of current mode state
* bit 0 Always off ( All systems )
* bit 1 Always on ( Travis ATG , Siberia )
* bit 2 Auto : ALS - based On ; ALS - based Off ( Travis ATG )
* bit 3 Auto : ALS - and input - activity - based On ; input - activity based Off
* bit 4 Auto : Input - activity - based On ; input - activity based Off
* bit 5 Auto : Input - activity - based On ( illumination level 25 % ) ; input - activity based Off
* bit 6 Auto : Input - activity - based On ( illumination level 50 % ) ; input - activity based Off
* bit 7 Auto : Input - activity - based On ( illumination level 75 % ) ; input - activity based Off
* bit 8 Auto : Input - activity - based On ( illumination level 100 % ) ; input - activity based Off
* bits 9 - 15 Reserved for future use
* Note : Only One bit can be set
* cbArg2 , byte2 Desired auto keyboard illumination triggers . Must remain inactive to allow
* keyboard to turn off automatically .
* bit 0 Any keystroke
* bit 1 Touchpad activity
* bit 2 Pointing stick
* bit 3 Any mouse
* bits 4 - 7 Reserved for future use
* cbArg2 , byte3 Desired Timeout on battery
* bits 7 : 6 Timeout units indicator :
* 00 b Seconds
* 01 b Minutes
* 10 b Hours
* 11 b Days
* bits 5 : 0 Timeout value ( 0 - 63 ) in sec / min / hr / day
* cbArg3 , byte0 Desired setting of ALS value that turns the light on or off .
* cbArg3 , byte2 Desired keyboard light level .
* cbArg3 , byte3 Desired Timeout on AC power
* bits 7 : 6 Timeout units indicator :
* 00 b Seconds
* 01 b Minutes
* 10 b Hours
* 11 b Days
* bits 5 : 0 Timeout value ( 0 - 63 ) in sec / min / hr / day
*/
enum kbd_timeout_unit {
KBD_TIMEOUT_SECONDS = 0 ,
KBD_TIMEOUT_MINUTES,
KBD_TIMEOUT_HOURS,
KBD_TIMEOUT_DAYS,
};
enum kbd_mode_bit {
KBD_MODE_BIT_OFF = 0 ,
KBD_MODE_BIT_ON,
KBD_MODE_BIT_ALS,
KBD_MODE_BIT_TRIGGER_ALS,
KBD_MODE_BIT_TRIGGER,
KBD_MODE_BIT_TRIGGER_25,
KBD_MODE_BIT_TRIGGER_50,
KBD_MODE_BIT_TRIGGER_75,
KBD_MODE_BIT_TRIGGER_100,
};
#define kbd_is_als_mode_bit(bit) \
((bit) == KBD_MODE_BIT_ALS || (bit) == KBD_MODE_BIT_TRIGGER_ALS)
#define kbd_is_trigger_mode_bit(bit) \
((bit) >= KBD_MODE_BIT_TRIGGER_ALS && (bit) <= KBD_MODE_BIT_TRIGGER_100)
#define kbd_is_level_mode_bit(bit) \
((bit) >= KBD_MODE_BIT_TRIGGER_25 && (bit) <= KBD_MODE_BIT_TRIGGER_100)
struct kbd_info {
u16 modes;
u8 type;
u8 triggers;
u8 levels;
u8 seconds;
u8 minutes;
u8 hours;
u8 days;
};
struct kbd_state {
u8 mode_bit;
u8 triggers;
u8 timeout_value;
u8 timeout_unit;
u8 timeout_value_ac;
u8 timeout_unit_ac;
u8 als_setting;
u8 als_value;
u8 level;
};
static const int kbd_tokens[] = {
KBD_LED_OFF_TOKEN,
KBD_LED_AUTO_25_TOKEN,
KBD_LED_AUTO_50_TOKEN,
KBD_LED_AUTO_75_TOKEN,
KBD_LED_AUTO_100_TOKEN,
KBD_LED_ON_TOKEN,
};
static u16 kbd_token_bits;
static struct kbd_info kbd_info;
static bool kbd_als_supported;
static bool kbd_triggers_supported;
static bool kbd_timeout_ac_supported;
static u8 kbd_mode_levels[16 ];
static int kbd_mode_levels_count;
static u8 kbd_previous_level;
static u8 kbd_previous_mode_bit;
static bool kbd_led_present;
static DEFINE_MUTEX(kbd_led_mutex);
static enum led_brightness kbd_led_level;
/*
* NOTE : there are three ways to set the keyboard backlight level .
* First , via kbd_state . mode_bit ( assigning KBD_MODE_BIT_TRIGGER_ * value ) .
* Second , via kbd_state . level ( assigning numerical value < = kbd_info . levels ) .
* Third , via SMBIOS tokens ( KBD_LED_ * in kbd_tokens )
*
* There are laptops which support only one of these methods . If we want to
* support as many machines as possible we need to implement all three methods .
* The first two methods use the kbd_state structure . The third uses SMBIOS
* tokens . If kbd_info . levels = = 0 , the machine does not support setting the
* keyboard backlight level via kbd_state . level .
*/
static int kbd_get_info(struct kbd_info *info)
{
struct calling_interface_buffer buffer;
u8 units;
int ret;
dell_fill_request(&buffer, 0 , 0 , 0 , 0 );
ret = dell_send_request(&buffer,
CLASS_KBD_BACKLIGHT, SELECT_KBD_BACKLIGHT);
if (ret)
return ret;
info->modes = buffer.output[1 ] & 0 xFFFF;
info->type = (buffer.output[1 ] >> 24 ) & 0 xFF;
info->triggers = buffer.output[2 ] & 0 xFF;
units = (buffer.output[2 ] >> 8 ) & 0 xFF;
info->levels = (buffer.output[2 ] >> 16 ) & 0 xFF;
if (quirks && quirks->kbd_led_levels_off_1 && info->levels)
info->levels--;
if (units & BIT(0 ))
info->seconds = (buffer.output[3 ] >> 0 ) & 0 xFF;
if (units & BIT(1 ))
info->minutes = (buffer.output[3 ] >> 8 ) & 0 xFF;
if (units & BIT(2 ))
info->hours = (buffer.output[3 ] >> 16 ) & 0 xFF;
if (units & BIT(3 ))
info->days = (buffer.output[3 ] >> 24 ) & 0 xFF;
return ret;
}
static unsigned int kbd_get_max_level(void )
{
if (kbd_info.levels != 0 )
return kbd_info.levels;
if (kbd_mode_levels_count > 0 )
return kbd_mode_levels_count - 1 ;
return 0 ;
}
static int kbd_get_level(struct kbd_state *state)
{
int i;
if (kbd_info.levels != 0 )
return state->level;
if (kbd_mode_levels_count > 0 ) {
for (i = 0 ; i < kbd_mode_levels_count; ++i)
if (kbd_mode_levels[i] == state->mode_bit)
return i;
return 0 ;
}
return -EINVAL;
}
static int kbd_set_level(struct kbd_state *state, u8 level)
{
if (kbd_info.levels != 0 ) {
if (level != 0 )
kbd_previous_level = level;
if (state->level == level)
return 0 ;
state->level = level;
if (level != 0 && state->mode_bit == KBD_MODE_BIT_OFF)
state->mode_bit = kbd_previous_mode_bit;
else if (level == 0 && state->mode_bit != KBD_MODE_BIT_OFF) {
kbd_previous_mode_bit = state->mode_bit;
state->mode_bit = KBD_MODE_BIT_OFF;
}
return 0 ;
}
if (kbd_mode_levels_count > 0 && level < kbd_mode_levels_count) {
if (level != 0 )
kbd_previous_level = level;
state->mode_bit = kbd_mode_levels[level];
return 0 ;
}
return -EINVAL;
}
static int kbd_get_state(struct kbd_state *state)
{
struct calling_interface_buffer buffer;
int ret;
dell_fill_request(&buffer, 0 x1, 0 , 0 , 0 );
ret = dell_send_request(&buffer,
CLASS_KBD_BACKLIGHT, SELECT_KBD_BACKLIGHT);
if (ret)
return ret;
state->mode_bit = ffs(buffer.output[1 ] & 0 xFFFF);
if (state->mode_bit != 0 )
state->mode_bit--;
state->triggers = (buffer.output[1 ] >> 16 ) & 0 xFF;
state->timeout_value = (buffer.output[1 ] >> 24 ) & 0 x3F;
state->timeout_unit = (buffer.output[1 ] >> 30 ) & 0 x3;
state->als_setting = buffer.output[2 ] & 0 xFF;
state->als_value = (buffer.output[2 ] >> 8 ) & 0 xFF;
state->level = (buffer.output[2 ] >> 16 ) & 0 xFF;
state->timeout_value_ac = (buffer.output[2 ] >> 24 ) & 0 x3F;
state->timeout_unit_ac = (buffer.output[2 ] >> 30 ) & 0 x3;
return ret;
}
static int kbd_set_state(struct kbd_state *state)
{
struct calling_interface_buffer buffer;
int ret;
u32 input1;
u32 input2;
input1 = BIT(state->mode_bit) & 0 xFFFF;
input1 |= (state->triggers & 0 xFF) << 16 ;
input1 |= (state->timeout_value & 0 x3F) << 24 ;
input1 |= (state->timeout_unit & 0 x3) << 30 ;
input2 = state->als_setting & 0 xFF;
input2 |= (state->level & 0 xFF) << 16 ;
input2 |= (state->timeout_value_ac & 0 x3F) << 24 ;
input2 |= (state->timeout_unit_ac & 0 x3) << 30 ;
dell_fill_request(&buffer, 0 x2, input1, input2, 0 );
ret = dell_send_request(&buffer,
CLASS_KBD_BACKLIGHT, SELECT_KBD_BACKLIGHT);
return ret;
}
static int kbd_set_state_safe(struct kbd_state *state, struct kbd_state *old)
{
int ret;
ret = kbd_set_state(state);
if (ret == 0 )
return 0 ;
/*
* When setting the new state fails , try to restore the previous one .
* This is needed on some machines where BIOS sets a default state when
* setting a new state fails . This default state could be all off .
*/
if (kbd_set_state(old))
pr_err("Setting old previous keyboard state failed\n" );
return ret;
}
static int kbd_set_token_bit(u8 bit)
{
struct calling_interface_buffer buffer;
if (bit >= ARRAY_SIZE(kbd_tokens))
return -EINVAL;
return dell_set_std_token_value(&buffer, kbd_tokens[bit], USE_TVAL);
}
static int kbd_get_token_bit(u8 bit)
{
struct calling_interface_buffer buffer;
struct calling_interface_token *token;
int ret;
int val;
if (bit >= ARRAY_SIZE(kbd_tokens))
return -EINVAL;
token = dell_smbios_find_token(kbd_tokens[bit]);
if (!token)
return -EINVAL;
dell_fill_request(&buffer, token->location, 0 , 0 , 0 );
ret = dell_send_request(&buffer, CLASS_TOKEN_READ, SELECT_TOKEN_STD);
if (ret)
return ret;
val = buffer.output[1 ];
return (val == token->value);
}
static int kbd_get_first_active_token_bit(void )
{
int i;
int ret;
for (i = 0 ; i < ARRAY_SIZE(kbd_tokens); ++i) {
ret = kbd_get_token_bit(i);
if (ret == 1 )
return i;
}
return ret;
}
static int kbd_get_valid_token_counts(void )
{
return hweight16(kbd_token_bits);
}
static inline int kbd_init_info(void )
{
struct kbd_state state;
int ret;
int i;
ret = kbd_get_info(&kbd_info);
if (ret)
return ret;
/* NOTE: Old models without KBD_LED_AC_TOKEN token supports only one
* timeout value which is shared for both battery and AC power
* settings . So do not try to set AC values on old models .
*/
if ((quirks && quirks->kbd_missing_ac_tag) ||
dell_smbios_find_token(KBD_LED_AC_TOKEN))
kbd_timeout_ac_supported = true ;
kbd_get_state(&state);
/* NOTE: timeout value is stored in 6 bits so max value is 63 */
if (kbd_info.seconds > 63 )
kbd_info.seconds = 63 ;
if (kbd_info.minutes > 63 )
kbd_info.minutes = 63 ;
if (kbd_info.hours > 63 )
kbd_info.hours = 63 ;
if (kbd_info.days > 63 )
kbd_info.days = 63 ;
/* NOTE: On tested machines ON mode did not work and caused
* problems ( turned backlight off ) so do not use it
*/
kbd_info.modes &= ~BIT(KBD_MODE_BIT_ON);
kbd_previous_level = kbd_get_level(&state);
kbd_previous_mode_bit = state.mode_bit;
if (kbd_previous_level == 0 && kbd_get_max_level() != 0 )
kbd_previous_level = 1 ;
if (kbd_previous_mode_bit == KBD_MODE_BIT_OFF) {
kbd_previous_mode_bit =
ffs(kbd_info.modes & ~BIT(KBD_MODE_BIT_OFF));
if (kbd_previous_mode_bit != 0 )
kbd_previous_mode_bit--;
}
if (kbd_info.modes & (BIT(KBD_MODE_BIT_ALS) |
BIT(KBD_MODE_BIT_TRIGGER_ALS)))
kbd_als_supported = true ;
if (kbd_info.modes & (
BIT(KBD_MODE_BIT_TRIGGER_ALS) | BIT(KBD_MODE_BIT_TRIGGER) |
BIT(KBD_MODE_BIT_TRIGGER_25) | BIT(KBD_MODE_BIT_TRIGGER_50) |
BIT(KBD_MODE_BIT_TRIGGER_75) | BIT(KBD_MODE_BIT_TRIGGER_100)
))
kbd_triggers_supported = true ;
/* kbd_mode_levels[0] is reserved, see below */
for (i = 0 ; i < 16 ; ++i)
if (kbd_is_level_mode_bit(i) && (BIT(i) & kbd_info.modes))
kbd_mode_levels[1 + kbd_mode_levels_count++] = i;
/*
* Find the first supported mode and assign to kbd_mode_levels [ 0 ] .
* This should be 0 ( off ) , but we cannot depend on the BIOS to
* support 0 .
*/
if (kbd_mode_levels_count > 0 ) {
for (i = 0 ; i < 16 ; ++i) {
if (BIT(i) & kbd_info.modes) {
kbd_mode_levels[0 ] = i;
break ;
}
}
kbd_mode_levels_count++;
}
return 0 ;
}
static inline void __init kbd_init_tokens(void )
{
int i;
for (i = 0 ; i < ARRAY_SIZE(kbd_tokens); ++i)
if (dell_smbios_find_token(kbd_tokens[i]))
kbd_token_bits |= BIT(i);
}
static void __init kbd_init(void )
{
int ret;
if (quirks && quirks->kbd_led_not_present)
return ;
ret = kbd_init_info();
kbd_init_tokens();
/*
* Only supports keyboard backlight when it has at least two modes .
*/
if ((ret == 0 && (kbd_info.levels != 0 || kbd_mode_levels_count >= 2 ))
|| kbd_get_valid_token_counts() >= 2 )
kbd_led_present = true ;
}
static ssize_t kbd_led_timeout_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct kbd_state new_state;
struct kbd_state state;
bool convert;
int value;
int ret;
char ch;
u8 unit;
int i;
ret = sscanf(buf, "%d %c" , &value, &ch);
if (ret < 1 )
return -EINVAL;
else if (ret == 1 )
ch = 's' ;
if (value < 0 )
return -EINVAL;
convert = false ;
switch (ch) {
case 's' :
if (value > kbd_info.seconds)
convert = true ;
unit = KBD_TIMEOUT_SECONDS;
break ;
case 'm' :
if (value > kbd_info.minutes)
convert = true ;
unit = KBD_TIMEOUT_MINUTES;
break ;
case 'h' :
if (value > kbd_info.hours)
convert = true ;
unit = KBD_TIMEOUT_HOURS;
break ;
case 'd' :
if (value > kbd_info.days)
convert = true ;
unit = KBD_TIMEOUT_DAYS;
break ;
default :
return -EINVAL;
}
if (quirks && quirks->needs_kbd_timeouts)
convert = true ;
if (convert) {
/* Convert value from current units to seconds */
switch (unit) {
case KBD_TIMEOUT_DAYS:
value *= 24 ;
fallthrough;
case KBD_TIMEOUT_HOURS:
value *= 60 ;
fallthrough;
case KBD_TIMEOUT_MINUTES:
value *= 60 ;
unit = KBD_TIMEOUT_SECONDS;
}
if (quirks && quirks->needs_kbd_timeouts) {
for (i = 0 ; quirks->kbd_timeouts[i] != -1 ; i++) {
if (value <= quirks->kbd_timeouts[i]) {
value = quirks->kbd_timeouts[i];
break ;
}
}
}
if (value <= kbd_info.seconds && kbd_info.seconds) {
unit = KBD_TIMEOUT_SECONDS;
} else if (value / 60 <= kbd_info.minutes && kbd_info.minutes) {
value /= 60 ;
unit = KBD_TIMEOUT_MINUTES;
} else if (value / (60 * 60 ) <= kbd_info.hours && kbd_info.hours) {
value /= (60 * 60 );
unit = KBD_TIMEOUT_HOURS;
} else if (value / (60 * 60 * 24 ) <= kbd_info.days && kbd_info.days) {
value /= (60 * 60 * 24 );
unit = KBD_TIMEOUT_DAYS;
} else {
return -EINVAL;
}
}
mutex_lock(&kbd_led_mutex);
ret = kbd_get_state(&state);
if (ret)
goto out;
new_state = state;
if (kbd_timeout_ac_supported && power_supply_is_system_supplied() > 0 ) {
new_state.timeout_value_ac = value;
new_state.timeout_unit_ac = unit;
} else {
new_state.timeout_value = value;
new_state.timeout_unit = unit;
}
ret = kbd_set_state_safe(&new_state, &state);
if (ret)
goto out;
ret = count;
out:
mutex_unlock(&kbd_led_mutex);
return ret;
}
static ssize_t kbd_led_timeout_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct kbd_state state;
int value;
int ret;
int len;
u8 unit;
ret = kbd_get_state(&state);
if (ret)
return ret;
if (kbd_timeout_ac_supported && power_supply_is_system_supplied() > 0 ) {
value = state.timeout_value_ac;
unit = state.timeout_unit_ac;
} else {
value = state.timeout_value;
unit = state.timeout_unit;
}
len = sprintf(buf, "%d" , value);
switch (unit) {
case KBD_TIMEOUT_SECONDS:
return len + sprintf(buf+len, "s\n" );
case KBD_TIMEOUT_MINUTES:
return len + sprintf(buf+len, "m\n" );
case KBD_TIMEOUT_HOURS:
return len + sprintf(buf+len, "h\n" );
case KBD_TIMEOUT_DAYS:
return len + sprintf(buf+len, "d\n" );
default :
return -EINVAL;
}
return len;
}
static DEVICE_ATTR(stop_timeout, S_IRUGO | S_IWUSR,
kbd_led_timeout_show, kbd_led_timeout_store);
static const char * const kbd_led_triggers[] = {
"keyboard" ,
"touchpad" ,
/*"trackstick"*/ NULL, /* NOTE: trackstick is just alias for touchpad */
"mouse" ,
};
static ssize_t kbd_led_triggers_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct kbd_state new_state;
struct kbd_state state;
bool triggers_enabled = false ;
int trigger_bit = -1 ;
char trigger[21 ];
int i, ret;
ret = sscanf(buf, "%20s" , trigger);
if (ret != 1 )
return -EINVAL;
if (trigger[0 ] != '+' && trigger[0 ] != '-' )
return -EINVAL;
mutex_lock(&kbd_led_mutex);
ret = kbd_get_state(&state);
if (ret)
goto out;
if (kbd_triggers_supported)
triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
if (kbd_triggers_supported) {
for (i = 0 ; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
if (!(kbd_info.triggers & BIT(i)))
continue ;
if (!kbd_led_triggers[i])
continue ;
if (strcmp(trigger+1 , kbd_led_triggers[i]) != 0 )
continue ;
if (trigger[0 ] == '+' &&
triggers_enabled && (state.triggers & BIT(i))) {
ret = count;
goto out;
}
if (trigger[0 ] == '-' &&
(!triggers_enabled || !(state.triggers & BIT(i)))) {
ret = count;
goto out;
}
trigger_bit = i;
break ;
}
}
if (trigger_bit == -1 ) {
ret = -EINVAL;
goto out;
}
new_state = state;
if (trigger[0 ] == '+' )
new_state.triggers |= BIT(trigger_bit);
else {
new_state.triggers &= ~BIT(trigger_bit);
/*
* NOTE : trackstick bit ( 2 ) must be disabled when
* disabling touchpad bit ( 1 ) , otherwise touchpad
* bit ( 1 ) will not be disabled
*/
if (trigger_bit == 1 )
new_state.triggers &= ~BIT(2 );
}
if ((kbd_info.triggers & new_state.triggers) !=
new_state.triggers) {
ret = -EINVAL;
goto out;
}
if (new_state.triggers && !triggers_enabled) {
new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
kbd_set_level(&new_state, kbd_previous_level);
} else if (new_state.triggers == 0 ) {
kbd_set_level(&new_state, 0 );
}
if (!(kbd_info.modes & BIT(new_state.mode_bit))) {
ret = -EINVAL;
goto out;
}
ret = kbd_set_state_safe(&new_state, &state);
if (ret)
goto out;
if (new_state.mode_bit != KBD_MODE_BIT_OFF)
kbd_previous_mode_bit = new_state.mode_bit;
ret = count;
out:
mutex_unlock(&kbd_led_mutex);
return ret;
}
static ssize_t kbd_led_triggers_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct kbd_state state;
bool triggers_enabled;
int level, i, ret;
int len = 0 ;
ret = kbd_get_state(&state);
if (ret)
return ret;
len = 0 ;
if (kbd_triggers_supported) {
triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
level = kbd_get_level(&state);
for (i = 0 ; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
if (!(kbd_info.triggers & BIT(i)))
continue ;
if (!kbd_led_triggers[i])
continue ;
if ((triggers_enabled || level <= 0 ) &&
(state.triggers & BIT(i)))
buf[len++] = '+' ;
else
buf[len++] = '-' ;
len += sprintf(buf+len, "%s " , kbd_led_triggers[i]);
}
}
if (len)
buf[len - 1 ] = '\n' ;
return len;
}
static DEVICE_ATTR(start_triggers, S_IRUGO | S_IWUSR,
kbd_led_triggers_show, kbd_led_triggers_store);
static ssize_t kbd_led_als_enabled_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct kbd_state new_state;
struct kbd_state state;
bool triggers_enabled = false ;
int enable;
int ret;
ret = kstrtoint(buf, 0 , &enable);
if (ret)
return ret;
mutex_lock(&kbd_led_mutex);
ret = kbd_get_state(&state);
if (ret)
goto out;
if (enable == kbd_is_als_mode_bit(state.mode_bit)) {
ret = count;
goto out;
}
new_state = state;
if (kbd_triggers_supported)
triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
if (enable) {
if (triggers_enabled)
new_state.mode_bit = KBD_MODE_BIT_TRIGGER_ALS;
else
new_state.mode_bit = KBD_MODE_BIT_ALS;
} else {
if (triggers_enabled) {
new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
kbd_set_level(&new_state, kbd_previous_level);
} else {
new_state.mode_bit = KBD_MODE_BIT_ON;
}
}
if (!(kbd_info.modes & BIT(new_state.mode_bit))) {
ret = -EINVAL;
goto out;
}
ret = kbd_set_state_safe(&new_state, &state);
if (ret)
goto out;
kbd_previous_mode_bit = new_state.mode_bit;
ret = count;
out:
mutex_unlock(&kbd_led_mutex);
return ret;
}
static ssize_t kbd_led_als_enabled_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct kbd_state state;
bool enabled = false ;
int ret;
ret = kbd_get_state(&state);
if (ret)
return ret;
enabled = kbd_is_als_mode_bit(state.mode_bit);
return sprintf(buf, "%d\n" , enabled ? 1 : 0 );
}
static DEVICE_ATTR(als_enabled, S_IRUGO | S_IWUSR,
kbd_led_als_enabled_show, kbd_led_als_enabled_store);
static ssize_t kbd_led_als_setting_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct kbd_state state;
struct kbd_state new_state;
u8 setting;
int ret;
ret = kstrtou8(buf, 10 , &setting);
if (ret)
return ret;
mutex_lock(&kbd_led_mutex);
ret = kbd_get_state(&state);
if (ret)
goto out;
new_state = state;
new_state.als_setting = setting;
ret = kbd_set_state_safe(&new_state, &state);
if (ret)
goto out;
ret = count;
out:
mutex_unlock(&kbd_led_mutex);
return ret;
}
static ssize_t kbd_led_als_setting_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct kbd_state state;
int ret;
ret = kbd_get_state(&state);
if (ret)
return ret;
return sprintf(buf, "%d\n" , state.als_setting);
}
static DEVICE_ATTR(als_setting, S_IRUGO | S_IWUSR,
kbd_led_als_setting_show, kbd_led_als_setting_store);
static struct attribute *kbd_led_attrs[] = {
&dev_attr_stop_timeout.attr,
&dev_attr_start_triggers.attr,
NULL,
};
static const struct attribute_group kbd_led_group = {
.attrs = kbd_led_attrs,
};
static struct attribute *kbd_led_als_attrs[] = {
&dev_attr_als_enabled.attr,
&dev_attr_als_setting.attr,
NULL,
};
static const struct attribute_group kbd_led_als_group = {
.attrs = kbd_led_als_attrs,
};
static const struct attribute_group *kbd_led_groups[] = {
&kbd_led_group,
&kbd_led_als_group,
NULL,
};
static enum led_brightness kbd_led_level_get(struct led_classdev *led_cdev)
{
int ret;
u16 num;
struct kbd_state state;
if (kbd_get_max_level()) {
ret = kbd_get_state(&state);
if (ret)
return 0 ;
ret = kbd_get_level(&state);
if (ret < 0 )
return 0 ;
return ret;
}
if (kbd_get_valid_token_counts()) {
ret = kbd_get_first_active_token_bit();
if (ret < 0 )
return 0 ;
for (num = kbd_token_bits; num != 0 && ret > 0 ; --ret)
num &= num - 1 ; /* clear the first bit set */
if (num == 0 )
return 0 ;
return ffs(num) - 1 ;
}
pr_warn("Keyboard brightness level control not supported\n" );
return 0 ;
}
static int kbd_led_level_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
enum led_brightness new_value = value;
struct kbd_state state;
struct kbd_state new_state;
u16 num;
int ret;
mutex_lock(&kbd_led_mutex);
if (kbd_get_max_level()) {
ret = kbd_get_state(&state);
if (ret)
goto out;
new_state = state;
ret = kbd_set_level(&new_state, value);
if (ret)
goto out;
ret = kbd_set_state_safe(&new_state, &state);
} else if (kbd_get_valid_token_counts()) {
for (num = kbd_token_bits; num != 0 && value > 0 ; --value)
num &= num - 1 ; /* clear the first bit set */
if (num == 0 )
ret = 0 ;
else
ret = kbd_set_token_bit(ffs(num) - 1 );
} else {
pr_warn("Keyboard brightness level control not supported\n" );
ret = -ENXIO;
}
out:
if (ret == 0 )
kbd_led_level = new_value;
mutex_unlock(&kbd_led_mutex);
return ret;
}
static struct led_classdev kbd_led = {
.name = "dell::kbd_backlight" ,
.flags = LED_BRIGHT_HW_CHANGED,
.brightness_set_blocking = kbd_led_level_set,
.brightness_get = kbd_led_level_get,
.groups = kbd_led_groups,
};
static int __init kbd_led_init(struct device *dev)
{
int ret;
kbd_init();
if (!kbd_led_present)
return -ENODEV;
if (!kbd_als_supported)
kbd_led_groups[1 ] = NULL;
kbd_led.max_brightness = kbd_get_max_level();
if (!kbd_led.max_brightness) {
kbd_led.max_brightness = kbd_get_valid_token_counts();
if (kbd_led.max_brightness)
kbd_led.max_brightness--;
}
kbd_led_level = kbd_led_level_get(NULL);
ret = led_classdev_register(dev, &kbd_led);
if (ret)
kbd_led_present = false ;
return ret;
}
static void brightness_set_exit(struct led_classdev *led_cdev,
enum led_brightness value)
{
/* Don't change backlight level on exit */
};
static void kbd_led_exit(void )
{
if (!kbd_led_present)
return ;
kbd_led.brightness_set = brightness_set_exit;
led_classdev_unregister(&kbd_led);
}
static int dell_laptop_notifier_call(struct notifier_block *nb,
unsigned long action, void *data)
{
bool changed = false ;
enum led_brightness new_kbd_led_level;
switch (action) {
case DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED:
if (!kbd_led_present)
break ;
mutex_lock(&kbd_led_mutex);
new_kbd_led_level = kbd_led_level_get(&kbd_led);
if (kbd_led_level != new_kbd_led_level) {
kbd_led_level = new_kbd_led_level;
changed = true ;
}
mutex_unlock(&kbd_led_mutex);
if (changed)
led_classdev_notify_brightness_hw_changed(&kbd_led,
kbd_led_level);
break ;
}
return NOTIFY_OK;
}
static struct notifier_block dell_laptop_notifier = {
.notifier_call = dell_laptop_notifier_call,
};
static int micmute_led_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct calling_interface_buffer buffer;
u32 tokenid;
tokenid = brightness == LED_OFF ?
GLOBAL_MIC_MUTE_DISABLE : GLOBAL_MIC_MUTE_ENABLE;
return dell_set_std_token_value(&buffer, tokenid, USE_TVAL);
}
static struct led_classdev micmute_led_cdev = {
.name = "platform::micmute" ,
.max_brightness = 1 ,
.brightness_set_blocking = micmute_led_set,
.default_trigger = "audio-micmute" ,
};
static int mute_led_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct calling_interface_buffer buffer;
u32 tokenid;
tokenid = brightness == LED_OFF ?
GLOBAL_MUTE_DISABLE : GLOBAL_MUTE_ENABLE;
return dell_set_std_token_value(&buffer, tokenid, USE_TVAL);
}
static struct led_classdev mute_led_cdev = {
.name = "platform::mute" ,
.max_brightness = 1 ,
.brightness_set_blocking = mute_led_set,
.default_trigger = "audio-mute" ,
};
static int dell_battery_set_mode(const u16 tokenid)
{
struct calling_interface_buffer buffer;
return dell_set_std_token_value(&buffer, tokenid, USE_TVAL);
}
static int dell_battery_read(const u16 tokenid)
{
struct calling_interface_buffer buffer;
int err;
err = dell_send_request_for_tokenid(&buffer, CLASS_TOKEN_READ,
SELECT_TOKEN_STD, tokenid, 0 );
if (err)
return err;
if (buffer.output[1 ] > INT_MAX)
return -EIO;
return buffer.output[1 ];
}
static bool dell_battery_mode_is_active(const u16 tokenid)
{
struct calling_interface_token *token;
int ret;
ret = dell_battery_read(tokenid);
if (ret < 0 )
return false ;
token = dell_smbios_find_token(tokenid);
/* token's already verified by dell_battery_read() */
return token->value == (u16) ret;
}
/*
* The rules : the minimum start charging value is 50 % . The maximum
* start charging value is 95 % . The minimum end charging value is
* 55 % . The maximum end charging value is 100 % . And finally , there
* has to be at least a 5 % difference between start & end values .
*/
#define CHARGE_START_MIN 50
#define CHARGE_START_MAX 95
#define CHARGE_END_MIN 55
#define CHARGE_END_MAX 100
#define CHARGE_MIN_DIFF 5
static int dell_battery_set_custom_charge_start(int start)
{
struct calling_interface_buffer buffer;
int end;
start = clamp(start, CHARGE_START_MIN, CHARGE_START_MAX);
end = dell_battery_read(BAT_CUSTOM_CHARGE_END);
if (end < 0 )
return end;
if ((end - start) < CHARGE_MIN_DIFF)
start = end - CHARGE_MIN_DIFF;
return dell_set_std_token_value(&buffer, BAT_CUSTOM_CHARGE_START,
start);
}
static int dell_battery_set_custom_charge_end(int end)
{
struct calling_interface_buffer buffer;
int start;
end = clamp(end, CHARGE_END_MIN, CHARGE_END_MAX);
start = dell_battery_read(BAT_CUSTOM_CHARGE_START);
if (start < 0 )
return start;
if ((end - start) < CHARGE_MIN_DIFF)
end = start + CHARGE_MIN_DIFF;
return dell_set_std_token_value(&buffer, BAT_CUSTOM_CHARGE_END, end);
}
static ssize_t charge_types_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
enum power_supply_charge_type charge_type;
int i;
for (i = 0 ; i < ARRAY_SIZE(battery_modes); i++) {
charge_type = battery_modes[i].charge_type;
if (!(battery_supported_modes & BIT(charge_type)))
continue ;
if (!dell_battery_mode_is_active(battery_modes[i].token))
continue ;
return power_supply_charge_types_show(dev, battery_supported_modes,
charge_type, buf);
}
/* No active mode found */
return -EIO;
}
static ssize_t charge_types_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
int charge_type, err, i;
charge_type = power_supply_charge_types_parse(battery_supported_modes, buf);
if (charge_type < 0 )
return charge_type;
for (i = 0 ; i < ARRAY_SIZE(battery_modes); i++) {
if (battery_modes[i].charge_type == charge_type)
break ;
}
if (i == ARRAY_SIZE(battery_modes))
return -ENOENT;
err = dell_battery_set_mode(battery_modes[i].token);
if (err)
return err;
return size;
}
static ssize_t charge_control_start_threshold_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int start;
start = dell_battery_read(BAT_CUSTOM_CHARGE_START);
if (start < 0 )
return start;
if (start > CHARGE_START_MAX)
return -EIO;
return sysfs_emit(buf, "%d\n" , start);
}
static ssize_t charge_control_start_threshold_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
int ret, start;
ret = kstrtoint(buf, 10 , &start);
if (ret)
return ret;
if (start < 0 || start > 100 )
return -EINVAL;
ret = dell_battery_set_custom_charge_start(start);
if (ret)
return ret;
return size;
}
static ssize_t charge_control_end_threshold_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int end;
end = dell_battery_read(BAT_CUSTOM_CHARGE_END);
if (end < 0 )
return end;
if (end > CHARGE_END_MAX)
return -EIO;
return sysfs_emit(buf, "%d\n" , end);
}
static ssize_t charge_control_end_threshold_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
int ret, end;
ret = kstrtouint(buf, 10 , &end);
if (ret)
return ret;
if (end < 0 || end > 100 )
return -EINVAL;
ret = dell_battery_set_custom_charge_end(end);
if (ret)
return ret;
return size;
}
static DEVICE_ATTR_RW(charge_control_start_threshold);
static DEVICE_ATTR_RW(charge_control_end_threshold);
static DEVICE_ATTR_RW(charge_types);
static struct attribute *dell_battery_attrs[] = {
&dev_attr_charge_control_start_threshold.attr,
&dev_attr_charge_control_end_threshold.attr,
&dev_attr_charge_types.attr,
NULL,
};
ATTRIBUTE_GROUPS(dell_battery);
static bool dell_battery_supported(struct power_supply *battery)
{
/* We currently only support the primary battery */
return strcmp(battery->desc->name, "BAT0" ) == 0 ;
}
static int dell_battery_add(struct power_supply *battery,
struct acpi_battery_hook *hook)
{
/* Return 0 instead of an error to avoid being unloaded */
if (!dell_battery_supported(battery))
return 0 ;
return device_add_groups(&battery->dev, dell_battery_groups);
}
static int dell_battery_remove(struct power_supply *battery,
struct acpi_battery_hook *hook)
{
if (!dell_battery_supported(battery))
return 0 ;
device_remove_groups(&battery->dev, dell_battery_groups);
return 0 ;
}
static struct acpi_battery_hook dell_battery_hook = {
.add_battery = dell_battery_add,
.remove_battery = dell_battery_remove,
.name = "Dell Primary Battery Extension" ,
};
static u32 __init battery_get_supported_modes(void )
{
u32 modes = 0 ;
int i;
for (i = 0 ; i < ARRAY_SIZE(battery_modes); i++) {
if (dell_smbios_find_token(battery_modes[i].token))
modes |= BIT(battery_modes[i].charge_type);
}
return modes;
}
static void __init dell_battery_init(struct device *dev)
{
battery_supported_modes = battery_get_supported_modes();
if (battery_supported_modes != 0 )
battery_hook_register(&dell_battery_hook);
}
static void dell_battery_exit(void )
{
if (battery_supported_modes != 0 )
battery_hook_unregister(&dell_battery_hook);
}
static int __init dell_init(void )
{
struct calling_interface_buffer buffer;
int max_intensity = 0 ;
int ret;
if (!dmi_check_system(dell_device_table))
return -ENODEV;
quirks = NULL;
/* find if this machine support other functions */
dmi_check_system(dell_quirks);
ret = platform_driver_register(&platform_driver);
if (ret)
goto fail_platform_driver;
platform_device = platform_device_alloc("dell-laptop" , PLATFORM_DEVID_NONE);
if (!platform_device) {
ret = -ENOMEM;
goto fail_platform_device1;
}
ret = platform_device_add(platform_device);
if (ret)
goto fail_platform_device2;
ret = dell_setup_rfkill();
if (ret) {
pr_warn("Unable to setup rfkill\n" );
goto fail_rfkill;
}
if (quirks && quirks->touchpad_led)
touchpad_led_init(&platform_device->dev);
kbd_led_init(&platform_device->dev);
dell_battery_init(&platform_device->dev);
dell_laptop_dir = debugfs_create_dir("dell_laptop" , NULL);
debugfs_create_file("rfkill" , 0444 , dell_laptop_dir, NULL,
&dell_debugfs_fops);
dell_laptop_register_notifier(&dell_laptop_notifier);
if (dell_smbios_find_token(GLOBAL_MIC_MUTE_DISABLE) &&
dell_smbios_find_token(GLOBAL_MIC_MUTE_ENABLE) &&
!dell_privacy_has_mic_mute()) {
ret = led_classdev_register(&platform_device->dev, &micmute_led_cdev);
if (ret < 0 )
goto fail_led;
micmute_led_registered = true ;
}
if (dell_smbios_find_token(GLOBAL_MUTE_DISABLE) &&
dell_smbios_find_token(GLOBAL_MUTE_ENABLE)) {
ret = led_classdev_register(&platform_device->dev, &mute_led_cdev);
if (ret < 0 )
goto fail_backlight;
mute_led_registered = true ;
}
if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
return 0 ;
ret = dell_send_request_for_tokenid(&buffer, CLASS_TOKEN_READ,
SELECT_TOKEN_AC, BRIGHTNESS_TOKEN, 0 );
if (ret == 0 )
max_intensity = buffer.output[3 ];
if (max_intensity) {
struct backlight_properties props;
memset(&props, 0 , sizeof (struct backlight_properties));
props.type = BACKLIGHT_PLATFORM;
props.max_brightness = max_intensity;
dell_backlight_device = backlight_device_register("dell_backlight" ,
&platform_device->dev,
NULL,
&dell_ops,
&props);
if (IS_ERR(dell_backlight_device)) {
ret = PTR_ERR(dell_backlight_device);
dell_backlight_device = NULL;
goto fail_backlight;
}
dell_backlight_device->props.brightness =
dell_get_intensity(dell_backlight_device);
if (dell_backlight_device->props.brightness < 0 ) {
ret = dell_backlight_device->props.brightness;
goto fail_get_brightness;
}
backlight_update_status(dell_backlight_device);
}
return 0 ;
fail_get_brightness:
backlight_device_unregister(dell_backlight_device);
fail_backlight:
if (micmute_led_registered)
led_classdev_unregister(&micmute_led_cdev);
if (mute_led_registered)
led_classdev_unregister(&mute_led_cdev);
fail_led:
dell_battery_exit();
dell_cleanup_rfkill();
fail_rfkill:
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 ret;
}
static void __exit dell_exit(void )
{
dell_laptop_unregister_notifier(&dell_laptop_notifier);
debugfs_remove_recursive(dell_laptop_dir);
if (quirks && quirks->touchpad_led)
touchpad_led_exit();
kbd_led_exit();
dell_battery_exit();
backlight_device_unregister(dell_backlight_device);
if (micmute_led_registered)
led_classdev_unregister(&micmute_led_cdev);
if (mute_led_registered)
led_classdev_unregister(&mute_led_cdev);
dell_cleanup_rfkill();
if (platform_device) {
platform_device_unregister(platform_device);
platform_driver_unregister(&platform_driver);
}
}
/* dell-rbtn.c driver export functions which will not work correctly (and could
* cause kernel crash ) if they are called before dell - rbtn . c init code . This is
* not problem when dell - rbtn . c is compiled as external module . When both files
* ( dell - rbtn . c and dell - laptop . c ) are compiled statically into kernel , then we
* need to ensure that dell_init ( ) will be called after initializing dell - rbtn .
* This can be achieved by late_initcall ( ) instead module_init ( ) .
*/
late_initcall(dell_init);
module_exit(dell_exit);
MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>" );
MODULE_AUTHOR("Gabriele Mazzotta <gabriele.mzt@gmail.com>" );
MODULE_AUTHOR("Pali Rohár <pali@kernel.org>" );
MODULE_DESCRIPTION("Dell laptop driver" );
MODULE_LICENSE("GPL" );
Messung V0.5 in Prozent C=99 H=91 G=94
¤ Diese beiden folgenden Angebotsgruppen bietet das Unternehmen0.90Angebot
(Wie Sie bei der Firma Beratungs- und Dienstleistungen beauftragen können 2026-10-03)
¤
*Eine klare Vorstellung vom Zielzustand