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linux-next/drivers/platform/x86/dell-laptop.c
Greg Kroah-Hartman 9ea18802d0 platform/x86: dell-laptop: no need to check return value of debugfs_create functions 
When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: "Pali Rohár" <pali.rohar@gmail.com>
Cc: Darren Hart <dvhart@infradead.org>
Cc: Andy Shevchenko <andy@infradead.org>
Cc: platform-driver-x86@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2019-06-17 15:20:58 +03:00

2278 lines
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/*
* 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 Rohár <pali.rohar@gmail.com>
*
* Based on documentation in the libsmbios package:
* Copyright (C) 2005-2014 Dell Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#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/acpi.h>
#include <linux/mm.h>
#include <linux/i8042.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <acpi/video.h>
#include "dell-rbtn.h"
#include "dell-smbios.h"
struct quirk_entry {
bool touchpad_led;
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 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;
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,
},
{ }
};
static void dell_fill_request(struct calling_interface_buffer *buffer,
u32 arg0, u32 arg1, u32 arg2, u32 arg3)
{
memset(buffer, 0, sizeof(struct calling_interface_buffer));
buffer->input[0] = arg0;
buffer->input[1] = arg1;
buffer->input[2] = arg2;
buffer->input[3] = arg3;
}
static int dell_send_request(struct calling_interface_buffer *buffer,
u16 class, u16 select)
{
int ret;
buffer->cmd_class = class;
buffer->cmd_select = select;
ret = dell_smbios_call(buffer);
if (ret != 0)
return ret;
return dell_smbios_error(buffer->output[0]);
}
/*
* 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)
{
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);
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;
struct calling_interface_token *token;
int ret;
token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
if (!token)
return -ENODEV;
dell_fill_request(&buffer,
token->location, bd->props.brightness, 0, 0);
if (power_supply_is_system_supplied() > 0)
ret = dell_send_request(&buffer,
CLASS_TOKEN_WRITE, SELECT_TOKEN_AC);
else
ret = dell_send_request(&buffer,
CLASS_TOKEN_WRITE, SELECT_TOKEN_BAT);
return ret;
}
static int dell_get_intensity(struct backlight_device *bd)
{
struct calling_interface_buffer buffer;
struct calling_interface_token *token;
int ret;
token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
if (!token)
return -ENODEV;
dell_fill_request(&buffer, token->location, 0, 0, 0);
if (power_supply_is_system_supplied() > 0)
ret = dell_send_request(&buffer,
CLASS_TOKEN_READ, SELECT_TOKEN_AC);
else
ret = dell_send_request(&buffer,
CLASS_TOKEN_READ, SELECT_TOKEN_BAT);
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);
}
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 0x0 = 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 0x1 = 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:
* 00b Seconds
* 01b Minutes
* 10b Hours
* 11b 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:
* 00b Seconds
* 01b Minutes
* 10b Hours
* 11b 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 0x2 = 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:
* 00b Seconds
* 01b Minutes
* 10b Hours
* 11b 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:
* 00b Seconds
* 01b Minutes
* 10b Hours
* 11b 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] & 0xFFFF;
info->type = (buffer.output[1] >> 24) & 0xFF;
info->triggers = buffer.output[2] & 0xFF;
units = (buffer.output[2] >> 8) & 0xFF;
info->levels = (buffer.output[2] >> 16) & 0xFF;
if (quirks && quirks->kbd_led_levels_off_1 && info->levels)
info->levels--;
if (units & BIT(0))
info->seconds = (buffer.output[3] >> 0) & 0xFF;
if (units & BIT(1))
info->minutes = (buffer.output[3] >> 8) & 0xFF;
if (units & BIT(2))
info->hours = (buffer.output[3] >> 16) & 0xFF;
if (units & BIT(3))
info->days = (buffer.output[3] >> 24) & 0xFF;
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, 0x1, 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] & 0xFFFF);
if (state->mode_bit != 0)
state->mode_bit--;
state->triggers = (buffer.output[1] >> 16) & 0xFF;
state->timeout_value = (buffer.output[1] >> 24) & 0x3F;
state->timeout_unit = (buffer.output[1] >> 30) & 0x3;
state->als_setting = buffer.output[2] & 0xFF;
state->als_value = (buffer.output[2] >> 8) & 0xFF;
state->level = (buffer.output[2] >> 16) & 0xFF;
state->timeout_value_ac = (buffer.output[2] >> 24) & 0x3F;
state->timeout_unit_ac = (buffer.output[2] >> 30) & 0x3;
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) & 0xFFFF;
input1 |= (state->triggers & 0xFF) << 16;
input1 |= (state->timeout_value & 0x3F) << 24;
input1 |= (state->timeout_unit & 0x3) << 30;
input2 = state->als_setting & 0xFF;
input2 |= (state->level & 0xFF) << 16;
input2 |= (state->timeout_value_ac & 0x3F) << 24;
input2 |= (state->timeout_unit_ac & 0x3) << 30;
dell_fill_request(&buffer, 0x2, 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;
struct calling_interface_token *token;
int ret;
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, token->value, 0, 0);
ret = dell_send_request(&buffer, CLASS_TOKEN_WRITE, SELECT_TOKEN_STD);
return ret;
}
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);
val = buffer.output[1];
if (ret)
return ret;
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 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 kbd_init(void)
{
int ret;
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;
/* fall through */
case KBD_TIMEOUT_HOURS:
value *= 60;
/* fall through */
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;
struct calling_interface_token *token;
int state = brightness != LED_OFF;
if (state == 0)
token = dell_smbios_find_token(GLOBAL_MIC_MUTE_DISABLE);
else
token = dell_smbios_find_token(GLOBAL_MIC_MUTE_ENABLE);
if (!token)
return -ENODEV;
dell_fill_request(&buffer, token->location, token->value, 0, 0);
dell_send_request(&buffer, CLASS_TOKEN_WRITE, SELECT_TOKEN_STD);
return 0;
}
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 __init dell_init(void)
{
struct calling_interface_token *token;
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", -1);
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_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);
micmute_led_cdev.brightness = ledtrig_audio_get(LED_AUDIO_MICMUTE);
ret = led_classdev_register(&platform_device->dev, &micmute_led_cdev);
if (ret < 0)
goto fail_led;
if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
return 0;
token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
if (token) {
struct calling_interface_buffer buffer;
dell_fill_request(&buffer, token->location, 0, 0, 0);
ret = dell_send_request(&buffer,
CLASS_TOKEN_READ, SELECT_TOKEN_AC);
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:
led_classdev_unregister(&micmute_led_cdev);
fail_led:
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();
backlight_device_unregister(dell_backlight_device);
led_classdev_unregister(&micmute_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.rohar@gmail.com>");
MODULE_DESCRIPTION("Dell laptop driver");
MODULE_LICENSE("GPL");
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