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dell-laptop.c
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for Dell laptop extras
*
* Copyright (c) Red Hat <[email protected]>
* Copyright (c) 2014 Gabriele Mazzotta <[email protected]>
* Copyright (c) 2014 Pali Rohár <[email protected]>
*
* 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 = 0x00
*
* 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 = 0x01
* 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 = 0x02
*
* 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 = 0x10
* 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 = 0x11
* 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 = 0x12
* cbRes1 Standard return codes (0, -1, -2)
*
* Commit Local Config Data to NVRAM
* cbArg1, byte0 = 0x13
* 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, 0x2, 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 & 0xF);
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, 0x2, 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, 0x2, 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, 0x2, 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 == 0xe0)) {
extended = true;
return false;
} else if (unlikely(extended)) {
switch (data) {
case 0x8:
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 = 0x97;
char data = 1;
i8042_command(&data, command | 1 << 12);
}
static void touchpad_led_off(void)
{
int command = 0x97;
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);