Skip to content

L
linux
Commit b78695a7 authored by Darren Hart's avatar Darren Hart
Browse files
Options

Revert "platform: x86: dell-laptop: Add support for keyboard backlight" 

This reverts commit 02b2aaaa.

This interface was determined to be flawed and required too invasive a
fix for the RC cycle. This will be revisited in 3.20.
Signed-off-by: default avatarDarren Hart <dvhart@linux.intel.com>
parent dc583769
Hide whitespace changes
Inline Side-by-side
Showing with 6 additions and 1049 deletions
drivers/platform/x86/dell-laptop.c
View file @ b78695a7
......@@ -2,11 +2,9 @@
* 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.
* Based on documentation in the libsmbios package, Copyright (C) 2005 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
......@@ -34,13 +32,6 @@
#include "../../firmware/dcdbas.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 */
......@@ -71,13 +62,6 @@ struct calling_interface_structure {
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;
......@@ -92,15 +76,6 @@ static int __init dmi_matched(const struct dmi_system_id *dmi)
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;
......@@ -292,15 +267,6 @@ static const struct dmi_system_id dell_quirks[] __initconst = {
},
.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,
},
{ }
};
......@@ -365,29 +331,17 @@ static void __init find_tokens(const struct dmi_header *dm, void *dummy)
}
}
static int find_token_id(int tokenid)
static int find_token_location(int tokenid)
{
int i;
for (i = 0; i < da_num_tokens; i++) {
if (da_tokens[i].tokenID == tokenid)
return i;
return da_tokens[i].location;
}
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)
......@@ -408,20 +362,6 @@ dell_send_request(struct calling_interface_buffer *buffer, int class,
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 DellWirelessCtl.cpp:
Class 17, select 11 is radio control. It returns an array of 32-bit values.
......@@ -776,7 +716,7 @@ static int dell_send_intensity(struct backlight_device *bd)
else
dell_send_request(buffer, 1, 1);
out:
out:
release_buffer();
return ret;
}
......@@ -800,7 +740,7 @@ static int dell_get_intensity(struct backlight_device *bd)
ret = buffer->output[1];
out:
out:
release_buffer();
return ret;
}
......@@ -849,984 +789,6 @@ 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;
bool als_enabled = false;
bool disable_als = false;
bool enable_als = 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_als_supported)
als_enabled = kbd_is_als_mode_bit(state.mode_bit);
if (kbd_triggers_supported)
triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
if (kbd_als_supported) {
if (strcmp(trigger, "+als") == 0) {
if (als_enabled)
return count;
enable_als = true;
} else if (strcmp(trigger, "-als") == 0) {
if (!als_enabled)
return count;
disable_als = true;
}
}
if (enable_als || disable_als) {
new_state = state;
if (enable_als) {
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;
}
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) {
if (als_enabled)
new_state.mode_bit = KBD_MODE_BIT_TRIGGER_ALS;
else {
new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
kbd_set_level(&new_state, kbd_previous_level);
}
} else if (new_state.triggers == 0) {
if (als_enabled)
new_state.mode_bit = KBD_MODE_BIT_ALS;
else
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 (kbd_als_supported) {
if (kbd_is_als_mode_bit(state.mode_bit))
len += sprintf(buf+len, "+als ");
else
len += sprintf(buf+len, "-als ");
}
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_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_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_show, kbd_led_als_store);
static struct attribute *kbd_led_attrs[] = {
&dev_attr_stop_timeout.attr,
&dev_attr_start_triggers.attr,
&dev_attr_als_setting.attr,
NULL,
};
ATTRIBUTE_GROUPS(kbd_led);
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;
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;
......@@ -1879,8 +841,6 @@ static int __init dell_init(void)
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,
......@@ -1948,7 +908,6 @@ static void __exit dell_exit(void)
debugfs_remove_recursive(dell_laptop_dir);
if (quirks && quirks->touchpad_led)
touchpad_led_exit();
kbd_led_exit();
i8042_remove_filter(dell_laptop_i8042_filter);
cancel_delayed_work_sync(&dell_rfkill_work);
backlight_device_unregister(dell_backlight_device);
......@@ -1965,7 +924,5 @@ module_init(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");
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7