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linux/drivers/platform/x86/dell-laptop.c
Pali Rohár 22565ba0bf dell-laptop: Do not cache hwswitch state 
The hwswitch state can be changed at runtime, so make sure dell-laptop
always knows the current state. It can be modified by the userspace
utility smbios-wireless-ctl.

Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
2015-07-06 15:35:23 -07:00

2254 lines
55 KiB
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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/slab.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <acpi/video.h>
#include "../../firmware/dcdbas.h"
#include "dell-rbtn.h"
#define BRIGHTNESS_TOKEN 0x7d
#define KBD_LED_OFF_TOKEN 0x01E1
#define KBD_LED_ON_TOKEN 0x01E2
#define KBD_LED_AUTO_TOKEN 0x01E3
#define KBD_LED_AUTO_25_TOKEN 0x02EA
#define KBD_LED_AUTO_50_TOKEN 0x02EB
#define KBD_LED_AUTO_75_TOKEN 0x02EC
#define KBD_LED_AUTO_100_TOKEN 0x02F6
/* This structure will be modified by the firmware when we enter
* system management mode, hence the volatiles */
struct calling_interface_buffer {
u16 class;
u16 select;
volatile u32 input[4];
volatile u32 output[4];
} __packed;
struct calling_interface_token {
u16 tokenID;
u16 location;
union {
u16 value;
u16 stringlength;
};
};
struct calling_interface_structure {
struct dmi_header header;
u16 cmdIOAddress;
u8 cmdIOCode;
u32 supportedCmds;
struct calling_interface_token tokens[];
} __packed;
struct quirk_entry {
u8 touchpad_led;
int 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 = 1,
};
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 = 1,
.kbd_timeouts = { 0, 5, 15, 60, 5 * 60, 15 * 60, -1 },
};
static int da_command_address;
static int da_command_code;
static int da_num_tokens;
static struct calling_interface_token *da_tokens;
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*/
},
},
{
.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,
},
{ }
};
static struct calling_interface_buffer *buffer;
static DEFINE_MUTEX(buffer_mutex);
static void clear_buffer(void)
{
memset(buffer, 0, sizeof(struct calling_interface_buffer));
}
static void get_buffer(void)
{
mutex_lock(&buffer_mutex);
clear_buffer();
}
static void release_buffer(void)
{
mutex_unlock(&buffer_mutex);
}
static void __init parse_da_table(const struct dmi_header *dm)
{
/* Final token is a terminator, so we don't want to copy it */
int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1;
struct calling_interface_token *new_da_tokens;
struct calling_interface_structure *table =
container_of(dm, struct calling_interface_structure, header);
/* 4 bytes of table header, plus 7 bytes of Dell header, plus at least
6 bytes of entry */
if (dm->length < 17)
return;
da_command_address = table->cmdIOAddress;
da_command_code = table->cmdIOCode;
new_da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) *
sizeof(struct calling_interface_token),
GFP_KERNEL);
if (!new_da_tokens)
return;
da_tokens = new_da_tokens;
memcpy(da_tokens+da_num_tokens, table->tokens,
sizeof(struct calling_interface_token) * tokens);
da_num_tokens += tokens;
}
static void __init find_tokens(const struct dmi_header *dm, void *dummy)
{
switch (dm->type) {
case 0xd4: /* Indexed IO */
case 0xd5: /* Protected Area Type 1 */
case 0xd6: /* Protected Area Type 2 */
break;
case 0xda: /* Calling interface */
parse_da_table(dm);
break;
}
}
static int find_token_id(int tokenid)
{
int i;
for (i = 0; i < da_num_tokens; i++) {
if (da_tokens[i].tokenID == tokenid)
return i;
}
return -1;
}
static int find_token_location(int tokenid)
{
int id;
id = find_token_id(tokenid);
if (id == -1)
return -1;
return da_tokens[id].location;
}
static struct calling_interface_buffer *
dell_send_request(struct calling_interface_buffer *buffer, int class,
int select)
{
struct smi_cmd command;
command.magic = SMI_CMD_MAGIC;
command.command_address = da_command_address;
command.command_code = da_command_code;
command.ebx = virt_to_phys(buffer);
command.ecx = 0x42534931;
buffer->class = class;
buffer->select = select;
dcdbas_smi_request(&command);
return buffer;
}
static inline int dell_smi_error(int value)
{
switch (value) {
case 0: /* Completed successfully */
return 0;
case -1: /* Completed with error */
return -EIO;
case -2: /* Function not supported */
return -ENXIO;
default: /* Unknown error */
return -EINVAL;
}
}
/*
* 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;
int hwswitch;
int status;
int ret;
get_buffer();
dell_send_request(buffer, 17, 11);
ret = buffer->output[0];
status = buffer->output[1];
if (ret != 0)
goto out;
clear_buffer();
buffer->input[0] = 0x2;
dell_send_request(buffer, 17, 11);
ret = buffer->output[0];
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;
clear_buffer();
buffer->input[0] = (1 | (radio<<8) | (disable << 16));
dell_send_request(buffer, 17, 11);
ret = buffer->output[0];
out:
release_buffer();
return dell_smi_error(ret);
}
/* Must be called with the buffer held */
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 */
int block = rfkill_blocked(rfkill);
clear_buffer();
buffer->input[0] = (1 | (radio << 8) | (block << 16));
dell_send_request(buffer, 17, 11);
} 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);
int hwswitch;
int status;
int ret;
get_buffer();
dell_send_request(buffer, 17, 11);
ret = buffer->output[0];
status = buffer->output[1];
if (ret != 0 || !(status & BIT(0))) {
release_buffer();
return;
}
clear_buffer();
buffer->input[0] = 0x2;
dell_send_request(buffer, 17, 11);
ret = buffer->output[0];
hwswitch = buffer->output[1];
release_buffer();
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)
{
int hwswitch_state;
int hwswitch_ret;
int status;
int ret;
get_buffer();
dell_send_request(buffer, 17, 11);
ret = buffer->output[0];
status = buffer->output[1];
clear_buffer();
buffer->input[0] = 0x2;
dell_send_request(buffer, 17, 11);
hwswitch_ret = buffer->output[0];
hwswitch_state = buffer->output[1];
release_buffer();
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;
}
static int dell_debugfs_open(struct inode *inode, struct file *file)
{
return single_open(file, dell_debugfs_show, inode->i_private);
}
static const struct file_operations dell_debugfs_fops = {
.owner = THIS_MODULE,
.open = dell_debugfs_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static void dell_update_rfkill(struct work_struct *ignored)
{
int hwswitch = 0;
int status;
int ret;
get_buffer();
dell_send_request(buffer, 17, 11);
ret = buffer->output[0];
status = buffer->output[1];
if (ret != 0)
goto out;
clear_buffer();
buffer->input[0] = 0x2;
dell_send_request(buffer, 17, 11);
ret = buffer->output[0];
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);
}
out:
release_buffer();
}
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)
{
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;
get_buffer();
dell_send_request(buffer, 17, 11);
ret = buffer->output[0];
status = buffer->output[1];
release_buffer();
/* 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)
{
int token;
int ret;
token = find_token_location(BRIGHTNESS_TOKEN);
if (token == -1)
return -ENODEV;
get_buffer();
buffer->input[0] = token;
buffer->input[1] = bd->props.brightness;
if (power_supply_is_system_supplied() > 0)
dell_send_request(buffer, 1, 2);
else
dell_send_request(buffer, 1, 1);
ret = dell_smi_error(buffer->output[0]);
release_buffer();
return ret;
}
static int dell_get_intensity(struct backlight_device *bd)
{
int token;
int ret;
token = find_token_location(BRIGHTNESS_TOKEN);
if (token == -1)
return -ENODEV;
get_buffer();
buffer->input[0] = token;
if (power_supply_is_system_supplied() > 0)
dell_send_request(buffer, 0, 2);
else
dell_send_request(buffer, 0, 1);
if (buffer->output[0])
ret = dell_smi_error(buffer->output[0]);
else
ret = buffer->output[1];
release_buffer();
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
* 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.
*
* 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
* 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.
*/
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 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 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;
/*
* 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)
{
u8 units;
int ret;
get_buffer();
buffer->input[0] = 0x0;
dell_send_request(buffer, 4, 11);
ret = buffer->output[0];
if (ret) {
ret = dell_smi_error(ret);
goto out;
}
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 (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;
out:
release_buffer();
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)
{
int ret;
get_buffer();
buffer->input[0] = 0x1;
dell_send_request(buffer, 4, 11);
ret = buffer->output[0];
if (ret) {
ret = dell_smi_error(ret);
goto out;
}
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;
out:
release_buffer();
return ret;
}
static int kbd_set_state(struct kbd_state *state)
{
int ret;
get_buffer();
buffer->input[0] = 0x2;
buffer->input[1] = BIT(state->mode_bit) & 0xFFFF;
buffer->input[1] |= (state->triggers & 0xFF) << 16;
buffer->input[1] |= (state->timeout_value & 0x3F) << 24;
buffer->input[1] |= (state->timeout_unit & 0x3) << 30;
buffer->input[2] = state->als_setting & 0xFF;
buffer->input[2] |= (state->level & 0xFF) << 16;
dell_send_request(buffer, 4, 11);
ret = buffer->output[0];
release_buffer();
return dell_smi_error(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)
{
int id;
int ret;
if (bit >= ARRAY_SIZE(kbd_tokens))
return -EINVAL;
id = find_token_id(kbd_tokens[bit]);
if (id == -1)
return -EINVAL;
get_buffer();
buffer->input[0] = da_tokens[id].location;
buffer->input[1] = da_tokens[id].value;
dell_send_request(buffer, 1, 0);
ret = buffer->output[0];
release_buffer();
return dell_smi_error(ret);
}
static int kbd_get_token_bit(u8 bit)
{
int id;
int ret;
int val;
if (bit >= ARRAY_SIZE(kbd_tokens))
return -EINVAL;
id = find_token_id(kbd_tokens[bit]);
if (id == -1)
return -EINVAL;
get_buffer();
buffer->input[0] = da_tokens[id].location;
dell_send_request(buffer, 0, 0);
ret = buffer->output[0];
val = buffer->output[1];
release_buffer();
if (ret)
return dell_smi_error(ret);
return (val == da_tokens[id].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;
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 (find_token_id(kbd_tokens[i]) != -1)
kbd_token_bits |= BIT(i);
}
static void kbd_init(void)
{
int ret;
ret = kbd_init_info();
kbd_init_tokens();
if (kbd_token_bits != 0 || ret == 0)
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;
case KBD_TIMEOUT_HOURS:
value *= 60;
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;
}
}
ret = kbd_get_state(&state);
if (ret)
return ret;
new_state = state;
new_state.timeout_value = value;
new_state.timeout_unit = unit;
ret = kbd_set_state_safe(&new_state, &state);
if (ret)
return ret;
return count;
}
static ssize_t kbd_led_timeout_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct kbd_state state;
int ret;
int len;
ret = kbd_get_state(&state);
if (ret)
return ret;
len = sprintf(buf, "%d", state.timeout_value);
switch (state.timeout_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;
ret = kbd_get_state(&state);
if (ret)
return ret;
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)))
return count;
if (trigger[0] == '-' &&
(!triggers_enabled || !(state.triggers & BIT(i))))
return count;
trigger_bit = i;
break;
}
}
if (trigger_bit != -1) {
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)
return -EINVAL;
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)))
return -EINVAL;
ret = kbd_set_state_safe(&new_state, &state);
if (ret)
return ret;
if (new_state.mode_bit != KBD_MODE_BIT_OFF)
kbd_previous_mode_bit = new_state.mode_bit;
return count;
}
return -EINVAL;
}
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;
ret = kbd_get_state(&state);
if (ret)
return ret;
if (enable == kbd_is_als_mode_bit(state.mode_bit))
return count;
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)))
return -EINVAL;
ret = kbd_set_state_safe(&new_state, &state);
if (ret)
return ret;
kbd_previous_mode_bit = new_state.mode_bit;
return count;
}
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;
ret = kbd_get_state(&state);
if (ret)
return ret;
new_state = state;
new_state.als_setting = setting;
ret = kbd_set_state_safe(&new_state, &state);
if (ret)
return ret;
return count;
}
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 void kbd_led_level_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct kbd_state state;
struct kbd_state new_state;
u16 num;
if (kbd_get_max_level()) {
if (kbd_get_state(&state))
return;
new_state = state;
if (kbd_set_level(&new_state, value))
return;
kbd_set_state_safe(&new_state, &state);
return;
}
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)
return;
kbd_set_token_bit(ffs(num) - 1);
return;
}
pr_warn("Keyboard brightness level control not supported\n");
}
static struct led_classdev kbd_led = {
.name = "dell::kbd_backlight",
.brightness_set = kbd_led_level_set,
.brightness_get = kbd_led_level_get,
.groups = kbd_led_groups,
};
static int __init kbd_led_init(struct device *dev)
{
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--;
}
return led_classdev_register(dev, &kbd_led);
}
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 __init dell_init(void)
{
int max_intensity = 0;
int token;
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);
dmi_walk(find_tokens, NULL);
if (!da_tokens) {
pr_info("Unable to find dmi tokens\n");
return -ENODEV;
}
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;
/*
* Allocate buffer below 4GB for SMI data--only 32-bit physical addr
* is passed to SMI handler.
*/
buffer = (void *)__get_free_page(GFP_KERNEL | GFP_DMA32);
if (!buffer) {
ret = -ENOMEM;
goto fail_buffer;
}
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);
if (dell_laptop_dir != NULL)
debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL,
&dell_debugfs_fops);
if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
return 0;
token = find_token_location(BRIGHTNESS_TOKEN);
if (token != -1) {
get_buffer();
buffer->input[0] = token;
dell_send_request(buffer, 0, 2);
if (buffer->output[0] == 0)
max_intensity = buffer->output[3];
release_buffer();
}
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);
backlight_update_status(dell_backlight_device);
}
return 0;
fail_backlight:
dell_cleanup_rfkill();
fail_rfkill:
free_page((unsigned long)buffer);
fail_buffer:
platform_device_del(platform_device);
fail_platform_device2:
platform_device_put(platform_device);
fail_platform_device1:
platform_driver_unregister(&platform_driver);
fail_platform_driver:
kfree(da_tokens);
return ret;
}
static void __exit dell_exit(void)
{
debugfs_remove_recursive(dell_laptop_dir);
if (quirks && quirks->touchpad_led)
touchpad_led_exit();
kbd_led_exit();
backlight_device_unregister(dell_backlight_device);
dell_cleanup_rfkill();
if (platform_device) {
platform_device_unregister(platform_device);
platform_driver_unregister(&platform_driver);
}
kfree(da_tokens);
free_page((unsigned long)buffer);
}
/* 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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