Merge branch 'thinkpad-acpi' into release
diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt
index 41bc99f..3d76507 100644
--- a/Documentation/laptops/thinkpad-acpi.txt
+++ b/Documentation/laptops/thinkpad-acpi.txt
@@ -20,7 +20,8 @@
kernel 2.6.29 and release 0.22.
The driver is named "thinkpad-acpi". In some places, like module
-names, "thinkpad_acpi" is used because of userspace issues.
+names and log messages, "thinkpad_acpi" is used because of userspace
+issues.
"tpacpi" is used as a shorthand where "thinkpad-acpi" would be too
long due to length limitations on some Linux kernel versions.
@@ -37,7 +38,7 @@
- ThinkLight on and off
- limited docking and undocking
- UltraBay eject
- - CMOS control
+ - CMOS/UCMS control
- LED control
- ACPI sounds
- temperature sensors
@@ -46,6 +47,7 @@
- Volume control
- Fan control and monitoring: fan speed, fan enable/disable
- WAN enable and disable
+ - UWB enable and disable
A compatibility table by model and feature is maintained on the web
site, http://ibm-acpi.sf.net/. I appreciate any success or failure
@@ -53,7 +55,7 @@
Please include the following information in your report:
- ThinkPad model name
- - a copy of your DSDT, from /proc/acpi/dsdt
+ - a copy of your ACPI tables, using the "acpidump" utility
- a copy of the output of dmidecode, with serial numbers
and UUIDs masked off
- which driver features work and which don't
@@ -66,17 +68,18 @@
------------
If you are compiling this driver as included in the Linux kernel
-sources, simply enable the CONFIG_THINKPAD_ACPI option, and optionally
-enable the CONFIG_THINKPAD_ACPI_BAY option if you want the
-thinkpad-specific bay functionality.
+sources, look for the CONFIG_THINKPAD_ACPI Kconfig option.
+It is located on the menu path: "Device Drivers" -> "X86 Platform
+Specific Device Drivers" -> "ThinkPad ACPI Laptop Extras".
+
Features
--------
The driver exports two different interfaces to userspace, which can be
used to access the features it provides. One is a legacy procfs-based
-interface, which will be removed at some time in the distant future.
-The other is a new sysfs-based interface which is not complete yet.
+interface, which will be removed at some time in the future. The other
+is a new sysfs-based interface which is not complete yet.
The procfs interface creates the /proc/acpi/ibm directory. There is a
file under that directory for each feature it supports. The procfs
@@ -111,15 +114,17 @@
as a driver attribute (see below).
Sysfs driver attributes are on the driver's sysfs attribute space,
-for 2.6.23 this is /sys/bus/platform/drivers/thinkpad_acpi/ and
+for 2.6.23+ this is /sys/bus/platform/drivers/thinkpad_acpi/ and
/sys/bus/platform/drivers/thinkpad_hwmon/
Sysfs device attributes are on the thinkpad_acpi device sysfs attribute
-space, for 2.6.23 this is /sys/devices/platform/thinkpad_acpi/.
+space, for 2.6.23+ this is /sys/devices/platform/thinkpad_acpi/.
Sysfs device attributes for the sensors and fan are on the
thinkpad_hwmon device's sysfs attribute space, but you should locate it
-looking for a hwmon device with the name attribute of "thinkpad".
+looking for a hwmon device with the name attribute of "thinkpad", or
+better yet, through libsensors.
+
Driver version
--------------
@@ -129,6 +134,7 @@
The driver name and version. No commands can be written to this file.
+
Sysfs interface version
-----------------------
@@ -160,6 +166,7 @@
(an attribute not being there *is* a valid way to make it clear that a
feature is not available in sysfs).
+
Hot keys
--------
@@ -172,17 +179,14 @@
firmware that such a driver is present, and modifies how the ThinkPad
firmware will behave in many situations.
-The driver enables the hot key feature automatically when loaded. The
-feature can later be disabled and enabled back at runtime. The driver
-will also restore the hot key feature to its previous state and mask
-when it is unloaded.
+The driver enables the HKEY ("hot key") event reporting automatically
+when loaded, and disables it when it is removed.
-When the hotkey feature is enabled and the hot key mask is set (see
-below), the driver will report HKEY events in the following format:
+The driver will report HKEY events in the following format:
ibm/hotkey HKEY 00000080 0000xxxx
-Some of these events refer to hot key presses, but not all.
+Some of these events refer to hot key presses, but not all of them.
The driver will generate events over the input layer for hot keys and
radio switches, and over the ACPI netlink layer for other events. The
@@ -214,13 +218,17 @@
The following commands can be written to the /proc/acpi/ibm/hotkey file:
- echo enable > /proc/acpi/ibm/hotkey -- enable the hot keys feature
- echo disable > /proc/acpi/ibm/hotkey -- disable the hot keys feature
echo 0xffffffff > /proc/acpi/ibm/hotkey -- enable all hot keys
echo 0 > /proc/acpi/ibm/hotkey -- disable all possible hot keys
... any other 8-hex-digit mask ...
echo reset > /proc/acpi/ibm/hotkey -- restore the original mask
+The following commands have been deprecated and will cause the kernel
+to log a warning:
+
+ echo enable > /proc/acpi/ibm/hotkey -- does nothing
+ echo disable > /proc/acpi/ibm/hotkey -- returns an error
+
The procfs interface does not support NVRAM polling control. So as to
maintain maximum bug-to-bug compatibility, it does not report any masks,
nor does it allow one to manipulate the hot key mask when the firmware
@@ -229,12 +237,9 @@
sysfs notes:
hotkey_bios_enabled:
- Returns the status of the hot keys feature when
- thinkpad-acpi was loaded. Upon module unload, the hot
- key feature status will be restored to this value.
+ DEPRECATED, WILL BE REMOVED SOON.
- 0: hot keys were disabled
- 1: hot keys were enabled (unusual)
+ Returns 0.
hotkey_bios_mask:
Returns the hot keys mask when thinkpad-acpi was loaded.
@@ -242,13 +247,10 @@
to this value.
hotkey_enable:
- Enables/disables the hot keys feature in the ACPI
- firmware, and reports current status of the hot keys
- feature. Has no effect on the NVRAM hot key polling
- functionality.
+ DEPRECATED, WILL BE REMOVED SOON.
- 0: disables the hot keys feature / feature disabled
- 1: enables the hot keys feature / feature enabled
+ 0: returns -EPERM
+ 1: does nothing
hotkey_mask:
bit mask to enable driver-handling (and depending on
@@ -618,6 +620,7 @@
and map them to KEY_BRIGHTNESS_UP and KEY_BRIGHTNESS_DOWN. Process
these keys on userspace somehow (e.g. by calling xbacklight).
+
Bluetooth
---------
@@ -628,6 +631,9 @@
This feature shows the presence and current state of a ThinkPad
Bluetooth device in the internal ThinkPad CDC slot.
+If the ThinkPad supports it, the Bluetooth state is stored in NVRAM,
+so it is kept across reboots and power-off.
+
Procfs notes:
If Bluetooth is installed, the following commands can be used:
@@ -652,6 +658,7 @@
rfkill controller switch "tpacpi_bluetooth_sw": refer to
Documentation/rfkill.txt for details.
+
Video output control -- /proc/acpi/ibm/video
--------------------------------------------
@@ -693,11 +700,8 @@
features of this driver, as it uses the same ACPI methods as
Fn-F7. Video switching on the console should still work.
-UPDATE: There's now a patch for the X.org Radeon driver which
-addresses this issue. Some people are reporting success with the patch
-while others are still having problems. For more information:
+UPDATE: refer to https://bugs.freedesktop.org/show_bug.cgi?id=2000
-https://bugs.freedesktop.org/show_bug.cgi?id=2000
ThinkLight control
------------------
@@ -720,10 +724,11 @@
documentation, in Documentation/leds-class.txt. The ThinkLight LED name
is "tpacpi::thinklight".
-Due to limitations in the sysfs LED class, if the status of the thinklight
+Due to limitations in the sysfs LED class, if the status of the ThinkLight
cannot be read or if it is unknown, thinkpad-acpi will report it as "off".
It is impossible to know if the status returned through sysfs is valid.
+
Docking / undocking -- /proc/acpi/ibm/dock
------------------------------------------
@@ -784,6 +789,7 @@
UltraBase docks and "dumb" port replicators like the Mini Dock (the
latter don't need any ACPI support, actually).
+
UltraBay eject -- /proc/acpi/ibm/bay
------------------------------------
@@ -847,8 +853,9 @@
Note: the UltraBay eject support on the 600e/x, A22p and A3x is
EXPERIMENTAL and may not work as expected. USE WITH CAUTION!
-CMOS control
-------------
+
+CMOS/UCMS control
+-----------------
procfs: /proc/acpi/ibm/cmos
sysfs device attribute: cmos_command
@@ -882,6 +889,7 @@
in newer ThinkPads it is just a compatibility layer. Do not use it, it is
exported just as a debug tool.
+
LED control
-----------
@@ -893,6 +901,17 @@
LED indicators as well. Newer ThinkPads cannot query the real status
of the LED indicators.
+Because misuse of the LEDs could induce an unaware user to perform
+dangerous actions (like undocking or ejecting a bay device while the
+buses are still active), or mask an important alarm (such as a nearly
+empty battery, or a broken battery), access to most LEDs is
+restricted.
+
+Unrestricted access to all LEDs requires that thinkpad-acpi be
+compiled with the CONFIG_THINKPAD_ACPI_UNSAFE_LEDS option enabled.
+Distributions must never enable this option. Individual users that
+are aware of the consequences are welcome to enabling it.
+
procfs notes:
The available commands are:
@@ -939,6 +958,7 @@
"timer" trigger, and leave the delay_on and delay_off parameters set to
zero (to request hardware acceleration autodetection).
+
ACPI sounds -- /proc/acpi/ibm/beep
----------------------------------
@@ -968,6 +988,7 @@
16 - one medium-pitched beep repeating constantly, stop with 17
17 - stop 16
+
Temperature sensors
-------------------
@@ -1115,6 +1136,7 @@
with this, do send me your results (including some complete dumps with
a description of the conditions when they were taken.)
+
LCD brightness control
----------------------
@@ -1124,10 +1146,9 @@
This feature allows software control of the LCD brightness on ThinkPad
models which don't have a hardware brightness slider.
-It has some limitations: the LCD backlight cannot be actually turned on or
-off by this interface, and in many ThinkPad models, the "dim while on
-battery" functionality will be enabled by the BIOS when this interface is
-used, and cannot be controlled.
+It has some limitations: the LCD backlight cannot be actually turned
+on or off by this interface, it just controls the backlight brightness
+level.
On IBM (and some of the earlier Lenovo) ThinkPads, the backlight control
has eight brightness levels, ranging from 0 to 7. Some of the levels
@@ -1136,10 +1157,15 @@
from 0 to 15.
There are two interfaces to the firmware for direct brightness control,
-EC and CMOS. To select which one should be used, use the
+EC and UCMS (or CMOS). To select which one should be used, use the
brightness_mode module parameter: brightness_mode=1 selects EC mode,
-brightness_mode=2 selects CMOS mode, brightness_mode=3 selects both EC
-and CMOS. The driver tries to auto-detect which interface to use.
+brightness_mode=2 selects UCMS mode, brightness_mode=3 selects EC
+mode with NVRAM backing (so that brightness changes are remembered
+across shutdown/reboot).
+
+The driver tries to select which interface to use from a table of
+defaults for each ThinkPad model. If it makes a wrong choice, please
+report this as a bug, so that we can fix it.
When display backlight brightness controls are available through the
standard ACPI interface, it is best to use it instead of this direct
@@ -1201,6 +1227,7 @@
and maybe reduce the life of the backlight lamps by needlessly kicking
its level up and down at every change.
+
Volume control -- /proc/acpi/ibm/volume
---------------------------------------
@@ -1217,6 +1244,11 @@
up or down command (the level command will not unmute the volume).
The current volume level and mute state is shown in the file.
+The ALSA mixer interface to this feature is still missing, but patches
+to add it exist. That problem should be addressed in the not so
+distant future.
+
+
Fan control and monitoring: fan speed, fan enable/disable
---------------------------------------------------------
@@ -1383,8 +1415,11 @@
sysfs device attribute: wwan_enable (deprecated)
sysfs rfkill class: switch "tpacpi_wwan_sw"
-This feature shows the presence and current state of a W-WAN (Sierra
-Wireless EV-DO) device.
+This feature shows the presence and current state of the built-in
+Wireless WAN device.
+
+If the ThinkPad supports it, the WWAN state is stored in NVRAM,
+so it is kept across reboots and power-off.
It was tested on a Lenovo ThinkPad X60. It should probably work on other
ThinkPad models which come with this module installed.
@@ -1413,6 +1448,7 @@
rfkill controller switch "tpacpi_wwan_sw": refer to
Documentation/rfkill.txt for details.
+
EXPERIMENTAL: UWB
-----------------
@@ -1431,6 +1467,7 @@
rfkill controller switch "tpacpi_uwb_sw": refer to
Documentation/rfkill.txt for details.
+
Multiple Commands, Module Parameters
------------------------------------
@@ -1445,6 +1482,7 @@
modprobe thinkpad_acpi hotkey=enable,0xffff video=auto_disable
+
Enabling debugging output
-------------------------
@@ -1457,8 +1495,15 @@
to enable more than one output class, just add their values.
Debug bitmask Description
+ 0x8000 Disclose PID of userspace programs
+ accessing some functions of the driver
0x0001 Initialization and probing
0x0002 Removal
+ 0x0004 RF Transmitter control (RFKILL)
+ (bluetooth, WWAN, UWB...)
+ 0x0008 HKEY event interface, hotkeys
+ 0x0010 Fan control
+ 0x0020 Backlight brightness
There is also a kernel build option to enable more debugging
information, which may be necessary to debug driver problems.
@@ -1467,6 +1512,7 @@
at runtime through sysfs, using the driver attribute debug_level. The
attribute takes the same bitmask as the debug module parameter above.
+
Force loading of module
-----------------------
@@ -1505,3 +1551,7 @@
0x020200: Add poll()/select() support to the following attributes:
hotkey_radio_sw, wakeup_hotunplug_complete, wakeup_reason
+
+0x020300: hotkey enable/disable support removed, attributes
+ hotkey_bios_enabled and hotkey_enable deprecated and
+ marked for removal.
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 3608081..d45c6ab 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -226,6 +226,30 @@
If you are not sure, say N here.
+config THINKPAD_ACPI_UNSAFE_LEDS
+ bool "Allow control of important LEDs (unsafe)"
+ depends on THINKPAD_ACPI
+ default n
+ ---help---
+ Overriding LED state on ThinkPads can mask important
+ firmware alerts (like critical battery condition), or misled
+ the user into damaging the hardware (undocking or ejecting
+ the bay while buses are still active), etc.
+
+ LED control on the ThinkPad is write-only (with very few
+ exceptions on very ancient models), which makes it
+ impossible to know beforehand if important information will
+ be lost when one changes LED state.
+
+ Users that know what they are doing can enable this option
+ and the driver will allow control of every LED, including
+ the ones on the dock stations.
+
+ Never enable this option on a distribution kernel.
+
+ Say N here, unless you are building a kernel for your own
+ use, and need to control the important firmware LEDs.
+
config THINKPAD_ACPI_DOCK
bool "Legacy Docking Station Support"
depends on THINKPAD_ACPI
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index d243320..ba3682c 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -3,7 +3,7 @@
*
*
* Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
- * Copyright (C) 2006-2008 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
+ * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -22,7 +22,7 @@
*/
#define TPACPI_VERSION "0.22"
-#define TPACPI_SYSFS_VERSION 0x020200
+#define TPACPI_SYSFS_VERSION 0x020300
/*
* Changelog:
@@ -54,6 +54,7 @@
#include <linux/string.h>
#include <linux/list.h>
#include <linux/mutex.h>
+#include <linux/sched.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/delay.h>
@@ -172,29 +173,26 @@
TPACPI_RFK_UWB_SW_ID,
};
-/* Debugging */
+/* printk headers */
#define TPACPI_LOG TPACPI_FILE ": "
-#define TPACPI_ALERT KERN_ALERT TPACPI_LOG
-#define TPACPI_CRIT KERN_CRIT TPACPI_LOG
-#define TPACPI_ERR KERN_ERR TPACPI_LOG
-#define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
-#define TPACPI_INFO KERN_INFO TPACPI_LOG
-#define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
+#define TPACPI_EMERG KERN_EMERG TPACPI_LOG
+#define TPACPI_ALERT KERN_ALERT TPACPI_LOG
+#define TPACPI_CRIT KERN_CRIT TPACPI_LOG
+#define TPACPI_ERR KERN_ERR TPACPI_LOG
+#define TPACPI_WARN KERN_WARNING TPACPI_LOG
+#define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
+#define TPACPI_INFO KERN_INFO TPACPI_LOG
+#define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG
+/* Debugging printk groups */
#define TPACPI_DBG_ALL 0xffff
+#define TPACPI_DBG_DISCLOSETASK 0x8000
#define TPACPI_DBG_INIT 0x0001
#define TPACPI_DBG_EXIT 0x0002
-#define dbg_printk(a_dbg_level, format, arg...) \
- do { if (dbg_level & a_dbg_level) \
- printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
- } while (0)
-#ifdef CONFIG_THINKPAD_ACPI_DEBUG
-#define vdbg_printk(a_dbg_level, format, arg...) \
- dbg_printk(a_dbg_level, format, ## arg)
-static const char *str_supported(int is_supported);
-#else
-#define vdbg_printk(a_dbg_level, format, arg...)
-#endif
+#define TPACPI_DBG_RFKILL 0x0004
+#define TPACPI_DBG_HKEY 0x0008
+#define TPACPI_DBG_FAN 0x0010
+#define TPACPI_DBG_BRGHT 0x0020
#define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
#define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
@@ -277,7 +275,6 @@
static struct {
u16 hotkey_mask_ff:1;
- u16 bright_cmos_ec_unsync:1;
} tp_warned;
struct thinkpad_id_data {
@@ -326,6 +323,39 @@
#endif
+/*************************************************************************
+ * Debugging helpers
+ */
+
+#define dbg_printk(a_dbg_level, format, arg...) \
+ do { if (dbg_level & (a_dbg_level)) \
+ printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
+ } while (0)
+
+#ifdef CONFIG_THINKPAD_ACPI_DEBUG
+#define vdbg_printk dbg_printk
+static const char *str_supported(int is_supported);
+#else
+#define vdbg_printk(a_dbg_level, format, arg...) \
+ do { } while (0)
+#endif
+
+static void tpacpi_log_usertask(const char * const what)
+{
+ printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
+ what, task_tgid_vnr(current));
+}
+
+#define tpacpi_disclose_usertask(what, format, arg...) \
+ do { \
+ if (unlikely( \
+ (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
+ (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
+ printk(TPACPI_DEBUG "%s: PID %d: " format, \
+ what, task_tgid_vnr(current), ## arg); \
+ } \
+ } while (0)
+
/****************************************************************************
****************************************************************************
*
@@ -989,10 +1019,13 @@
/* try to set the initial state as the default for the rfkill
* type, since we ask the firmware to preserve it across S5 in
* NVRAM */
- rfkill_set_default(rfktype,
+ if (rfkill_set_default(rfktype,
(initial_state == RFKILL_STATE_UNBLOCKED) ?
RFKILL_STATE_UNBLOCKED :
- RFKILL_STATE_SOFT_BLOCKED);
+ RFKILL_STATE_SOFT_BLOCKED) == -EPERM)
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "Default state for %s cannot be changed\n",
+ name);
}
*rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
@@ -1020,6 +1053,21 @@
return 0;
}
+static void printk_deprecated_attribute(const char * const what,
+ const char * const details)
+{
+ tpacpi_log_usertask("deprecated sysfs attribute");
+ printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
+ "will be removed. %s\n",
+ what, details);
+}
+
+static void printk_deprecated_rfkill_attribute(const char * const what)
+{
+ printk_deprecated_attribute(what,
+ "Please switch to generic rfkill before year 2010");
+}
+
/*************************************************************************
* thinkpad-acpi driver attributes
*/
@@ -1382,7 +1430,6 @@
static int hotkey_autosleep_ack;
-static int hotkey_orig_status;
static u32 hotkey_orig_mask;
static u32 hotkey_all_mask;
static u32 hotkey_reserved_mask;
@@ -1529,9 +1576,9 @@
return 0;
}
-static int hotkey_status_set(int status)
+static int hotkey_status_set(bool enable)
{
- if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
+ if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
return -EIO;
return 0;
@@ -1847,6 +1894,9 @@
{
int res, status;
+ printk_deprecated_attribute("hotkey_enable",
+ "Hotkey reporting is always enabled");
+
res = hotkey_status_get(&status);
if (res)
return res;
@@ -1859,14 +1909,17 @@
const char *buf, size_t count)
{
unsigned long t;
- int res;
+
+ printk_deprecated_attribute("hotkey_enable",
+ "Hotkeys can be disabled through hotkey_mask");
if (parse_strtoul(buf, 1, &t))
return -EINVAL;
- res = hotkey_status_set(t);
+ if (t == 0)
+ return -EPERM;
- return (res) ? res : count;
+ return count;
}
static struct device_attribute dev_attr_hotkey_enable =
@@ -1910,6 +1963,8 @@
mutex_unlock(&hotkey_mutex);
+ tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
+
return (res) ? res : count;
}
@@ -1922,7 +1977,7 @@
struct device_attribute *attr,
char *buf)
{
- return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
+ return sprintf(buf, "0\n");
}
static struct device_attribute dev_attr_hotkey_bios_enabled =
@@ -1996,6 +2051,8 @@
mutex_unlock(&hotkey_mutex);
+ tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
+
return count;
}
@@ -2028,6 +2085,8 @@
hotkey_poll_setup(1);
mutex_unlock(&hotkey_mutex);
+ tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
+
return count;
}
@@ -2197,11 +2256,11 @@
kfree(hotkey_keycode_map);
if (tp_features.hotkey) {
- dbg_printk(TPACPI_DBG_EXIT,
+ dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
"restoring original hot key mask\n");
/* no short-circuit boolean operator below! */
if ((hotkey_mask_set(hotkey_orig_mask) |
- hotkey_status_set(hotkey_orig_status)) != 0)
+ hotkey_status_set(false)) != 0)
printk(TPACPI_ERR
"failed to restore hot key mask "
"to BIOS defaults\n");
@@ -2327,7 +2386,8 @@
int status;
int hkeyv;
- vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
+ "initializing hotkey subdriver\n");
BUG_ON(!tpacpi_inputdev);
BUG_ON(tpacpi_inputdev->open != NULL ||
@@ -2344,7 +2404,8 @@
/* hotkey not supported on 570 */
tp_features.hotkey = hkey_handle != NULL;
- vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
+ "hotkeys are %s\n",
str_supported(tp_features.hotkey));
if (!tp_features.hotkey)
@@ -2376,10 +2437,14 @@
* T4x, X31, and later
*/
tp_features.hotkey_mask = 1;
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
+ "firmware HKEY interface version: 0x%x\n",
+ hkeyv);
}
}
- vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
+ "hotkey masks are %s\n",
str_supported(tp_features.hotkey_mask));
if (tp_features.hotkey_mask) {
@@ -2396,10 +2461,6 @@
/* hotkey_source_mask *must* be zero for
* the first hotkey_mask_get */
- res = hotkey_status_get(&hotkey_orig_status);
- if (res)
- goto err_exit;
-
if (tp_features.hotkey_mask) {
res = hotkey_mask_get();
if (res)
@@ -2422,7 +2483,7 @@
hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
}
- vdbg_printk(TPACPI_DBG_INIT,
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
"hotkey source mask 0x%08x, polling freq %d\n",
hotkey_source_mask, hotkey_poll_freq);
#endif
@@ -2476,12 +2537,12 @@
}
if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
- dbg_printk(TPACPI_DBG_INIT,
+ dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
"using Lenovo default hot key map\n");
memcpy(hotkey_keycode_map, &lenovo_keycode_map,
TPACPI_HOTKEY_MAP_SIZE);
} else {
- dbg_printk(TPACPI_DBG_INIT,
+ dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
"using IBM default hot key map\n");
memcpy(hotkey_keycode_map, &ibm_keycode_map,
TPACPI_HOTKEY_MAP_SIZE);
@@ -2538,8 +2599,9 @@
| (1 << TP_ACPI_HOTKEYSCAN_FNEND);
}
- dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
- res = hotkey_status_set(1);
+ dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
+ "enabling firmware HKEY event interface...\n");
+ res = hotkey_status_set(true);
if (res) {
hotkey_exit();
return res;
@@ -2552,8 +2614,8 @@
return res;
}
- dbg_printk(TPACPI_DBG_INIT,
- "legacy hot key reporting over procfs %s\n",
+ dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
+ "legacy ibm/hotkey event reporting over procfs %s\n",
(hotkey_report_mode < 2) ?
"enabled" : "disabled");
@@ -2884,9 +2946,17 @@
return len;
}
+static void hotkey_enabledisable_warn(void)
+{
+ tpacpi_log_usertask("procfs hotkey enable/disable");
+ WARN(1, TPACPI_WARN
+ "hotkey enable/disable functionality has been "
+ "removed from the driver. Hotkeys are always enabled.\n");
+}
+
static int hotkey_write(char *buf)
{
- int res, status;
+ int res;
u32 mask;
char *cmd;
@@ -2896,17 +2966,16 @@
if (mutex_lock_killable(&hotkey_mutex))
return -ERESTARTSYS;
- status = -1;
mask = hotkey_mask;
res = 0;
while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "enable") == 0) {
- status = 1;
+ hotkey_enabledisable_warn();
} else if (strlencmp(cmd, "disable") == 0) {
- status = 0;
+ hotkey_enabledisable_warn();
+ res = -EPERM;
} else if (strlencmp(cmd, "reset") == 0) {
- status = hotkey_orig_status;
mask = hotkey_orig_mask;
} else if (sscanf(cmd, "0x%x", &mask) == 1) {
/* mask set */
@@ -2917,8 +2986,10 @@
goto errexit;
}
}
- if (status != -1)
- res = hotkey_status_set(status);
+
+ if (!res)
+ tpacpi_disclose_usertask("procfs hotkey",
+ "set mask to 0x%08x\n", mask);
if (!res && mask != hotkey_mask)
res = hotkey_mask_set(mask);
@@ -2971,13 +3042,17 @@
TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */
};
+#define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw"
+
static struct rfkill *tpacpi_bluetooth_rfkill;
static void bluetooth_suspend(pm_message_t state)
{
/* Try to make sure radio will resume powered off */
- acpi_evalf(NULL, NULL, "\\BLTH", "vd",
- TP_ACPI_BLTH_PWR_OFF_ON_RESUME);
+ if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
+ TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "bluetooth power down on resume request failed\n");
}
static int bluetooth_get_radiosw(void)
@@ -3015,6 +3090,10 @@
if (status < 0)
return;
rfkill_force_state(tpacpi_bluetooth_rfkill, status);
+
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "forced rfkill state to %d\n",
+ status);
}
static int bluetooth_set_radiosw(int radio_on, int update_rfk)
@@ -3030,6 +3109,9 @@
&& radio_on)
return -EPERM;
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "will %s bluetooth\n", radio_on ? "enable" : "disable");
+
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_bluetoothemul) {
tpacpi_bluetooth_emulstate = !!radio_on;
@@ -3060,6 +3142,8 @@
{
int status;
+ printk_deprecated_rfkill_attribute("bluetooth_enable");
+
status = bluetooth_get_radiosw();
if (status < 0)
return status;
@@ -3075,9 +3159,13 @@
unsigned long t;
int res;
+ printk_deprecated_rfkill_attribute("bluetooth_enable");
+
if (parse_strtoul(buf, 1, &t))
return -EINVAL;
+ tpacpi_disclose_usertask("bluetooth_enable", "set to %ld\n", t);
+
res = bluetooth_set_radiosw(t, 1);
return (res) ? res : count;
@@ -3111,6 +3199,8 @@
static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
{
+ dbg_printk(TPACPI_DBG_RFKILL,
+ "request to change radio state to %d\n", state);
return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
}
@@ -3121,6 +3211,9 @@
TP_ACPI_BLTH_SAVE_STATE))
printk(TPACPI_NOTICE
"failed to save bluetooth state to NVRAM\n");
+ else
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "bluestooth state saved to NVRAM\n");
}
static void bluetooth_exit(void)
@@ -3139,7 +3232,8 @@
int res;
int status = 0;
- vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
+ "initializing bluetooth subdriver\n");
TPACPI_ACPIHANDLE_INIT(hkey);
@@ -3148,7 +3242,8 @@
tp_features.bluetooth = hkey_handle &&
acpi_evalf(hkey_handle, &status, "GBDC", "qd");
- vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
+ "bluetooth is %s, status 0x%02x\n",
str_supported(tp_features.bluetooth),
status);
@@ -3163,7 +3258,7 @@
!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
/* no bluetooth hardware present in system */
tp_features.bluetooth = 0;
- dbg_printk(TPACPI_DBG_INIT,
+ dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
"bluetooth hardware not installed\n");
}
@@ -3178,7 +3273,7 @@
res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
&tpacpi_bluetooth_rfkill,
RFKILL_TYPE_BLUETOOTH,
- "tpacpi_bluetooth_sw",
+ TPACPI_RFK_BLUETOOTH_SW_NAME,
true,
tpacpi_bluetooth_rfk_set,
tpacpi_bluetooth_rfk_get);
@@ -3211,19 +3306,27 @@
static int bluetooth_write(char *buf)
{
char *cmd;
+ int state = -1;
if (!tp_features.bluetooth)
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "enable") == 0) {
- bluetooth_set_radiosw(1, 1);
+ state = 1;
} else if (strlencmp(cmd, "disable") == 0) {
- bluetooth_set_radiosw(0, 1);
+ state = 0;
} else
return -EINVAL;
}
+ if (state != -1) {
+ tpacpi_disclose_usertask("procfs bluetooth",
+ "attempt to %s\n",
+ state ? "enable" : "disable");
+ bluetooth_set_radiosw(state, 1);
+ }
+
return 0;
}
@@ -3248,13 +3351,17 @@
off / last state */
};
+#define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw"
+
static struct rfkill *tpacpi_wan_rfkill;
static void wan_suspend(pm_message_t state)
{
/* Try to make sure radio will resume powered off */
- acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
- TP_ACPI_WGSV_PWR_OFF_ON_RESUME);
+ if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
+ TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "WWAN power down on resume request failed\n");
}
static int wan_get_radiosw(void)
@@ -3292,6 +3399,10 @@
if (status < 0)
return;
rfkill_force_state(tpacpi_wan_rfkill, status);
+
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "forced rfkill state to %d\n",
+ status);
}
static int wan_set_radiosw(int radio_on, int update_rfk)
@@ -3307,6 +3418,9 @@
&& radio_on)
return -EPERM;
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "will %s WWAN\n", radio_on ? "enable" : "disable");
+
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_wwanemul) {
tpacpi_wwan_emulstate = !!radio_on;
@@ -3337,6 +3451,8 @@
{
int status;
+ printk_deprecated_rfkill_attribute("wwan_enable");
+
status = wan_get_radiosw();
if (status < 0)
return status;
@@ -3352,9 +3468,13 @@
unsigned long t;
int res;
+ printk_deprecated_rfkill_attribute("wwan_enable");
+
if (parse_strtoul(buf, 1, &t))
return -EINVAL;
+ tpacpi_disclose_usertask("wwan_enable", "set to %ld\n", t);
+
res = wan_set_radiosw(t, 1);
return (res) ? res : count;
@@ -3388,6 +3508,8 @@
static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
{
+ dbg_printk(TPACPI_DBG_RFKILL,
+ "request to change radio state to %d\n", state);
return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
}
@@ -3398,6 +3520,9 @@
TP_ACPI_WGSV_SAVE_STATE))
printk(TPACPI_NOTICE
"failed to save WWAN state to NVRAM\n");
+ else
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "WWAN state saved to NVRAM\n");
}
static void wan_exit(void)
@@ -3416,14 +3541,16 @@
int res;
int status = 0;
- vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
+ "initializing wan subdriver\n");
TPACPI_ACPIHANDLE_INIT(hkey);
tp_features.wan = hkey_handle &&
acpi_evalf(hkey_handle, &status, "GWAN", "qd");
- vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
+ "wan is %s, status 0x%02x\n",
str_supported(tp_features.wan),
status);
@@ -3438,7 +3565,7 @@
!(status & TP_ACPI_WANCARD_HWPRESENT)) {
/* no wan hardware present in system */
tp_features.wan = 0;
- dbg_printk(TPACPI_DBG_INIT,
+ dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
"wan hardware not installed\n");
}
@@ -3453,7 +3580,7 @@
res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
&tpacpi_wan_rfkill,
RFKILL_TYPE_WWAN,
- "tpacpi_wwan_sw",
+ TPACPI_RFK_WWAN_SW_NAME,
true,
tpacpi_wan_rfk_set,
tpacpi_wan_rfk_get);
@@ -3471,6 +3598,8 @@
int len = 0;
int status = wan_get_radiosw();
+ tpacpi_disclose_usertask("procfs wan", "read");
+
if (!tp_features.wan)
len += sprintf(p + len, "status:\t\tnot supported\n");
else {
@@ -3486,19 +3615,27 @@
static int wan_write(char *buf)
{
char *cmd;
+ int state = -1;
if (!tp_features.wan)
return -ENODEV;
while ((cmd = next_cmd(&buf))) {
if (strlencmp(cmd, "enable") == 0) {
- wan_set_radiosw(1, 1);
+ state = 1;
} else if (strlencmp(cmd, "disable") == 0) {
- wan_set_radiosw(0, 1);
+ state = 0;
} else
return -EINVAL;
}
+ if (state != -1) {
+ tpacpi_disclose_usertask("procfs wan",
+ "attempt to %s\n",
+ state ? "enable" : "disable");
+ wan_set_radiosw(state, 1);
+ }
+
return 0;
}
@@ -3521,6 +3658,8 @@
TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */
};
+#define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw"
+
static struct rfkill *tpacpi_uwb_rfkill;
static int uwb_get_radiosw(void)
@@ -3558,6 +3697,10 @@
if (status < 0)
return;
rfkill_force_state(tpacpi_uwb_rfkill, status);
+
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "forced rfkill state to %d\n",
+ status);
}
static int uwb_set_radiosw(int radio_on, int update_rfk)
@@ -3573,6 +3716,9 @@
&& radio_on)
return -EPERM;
+ vdbg_printk(TPACPI_DBG_RFKILL,
+ "will %s UWB\n", radio_on ? "enable" : "disable");
+
#ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
if (dbg_uwbemul) {
tpacpi_uwb_emulstate = !!radio_on;
@@ -3607,6 +3753,8 @@
static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
{
+ dbg_printk(TPACPI_DBG_RFKILL,
+ "request to change radio state to %d\n", state);
return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
}
@@ -3621,14 +3769,16 @@
int res;
int status = 0;
- vdbg_printk(TPACPI_DBG_INIT, "initializing uwb subdriver\n");
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
+ "initializing uwb subdriver\n");
TPACPI_ACPIHANDLE_INIT(hkey);
tp_features.uwb = hkey_handle &&
acpi_evalf(hkey_handle, &status, "GUWB", "qd");
- vdbg_printk(TPACPI_DBG_INIT, "uwb is %s, status 0x%02x\n",
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
+ "uwb is %s, status 0x%02x\n",
str_supported(tp_features.uwb),
status);
@@ -3653,7 +3803,7 @@
res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
&tpacpi_uwb_rfkill,
RFKILL_TYPE_UWB,
- "tpacpi_uwb_sw",
+ TPACPI_RFK_UWB_SW_NAME,
false,
tpacpi_uwb_rfk_set,
tpacpi_uwb_rfk_get);
@@ -4602,6 +4752,16 @@
"tpacpi::unknown_led",
"tpacpi::standby",
};
+#define TPACPI_SAFE_LEDS 0x0081U
+
+static inline bool tpacpi_is_led_restricted(const unsigned int led)
+{
+#ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
+ return false;
+#else
+ return (TPACPI_SAFE_LEDS & (1 << led)) == 0;
+#endif
+}
static int led_get_status(const unsigned int led)
{
@@ -4639,16 +4799,20 @@
switch (led_supported) {
case TPACPI_LED_570:
/* 570 */
- if (led > 7)
+ if (unlikely(led > 7))
return -EINVAL;
+ if (unlikely(tpacpi_is_led_restricted(led)))
+ return -EPERM;
if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
(1 << led), led_sled_arg1[ledstatus]))
rc = -EIO;
break;
case TPACPI_LED_OLD:
/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
- if (led > 7)
+ if (unlikely(led > 7))
return -EINVAL;
+ if (unlikely(tpacpi_is_led_restricted(led)))
+ return -EPERM;
rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
if (rc >= 0)
rc = ec_write(TPACPI_LED_EC_HLBL,
@@ -4659,6 +4823,10 @@
break;
case TPACPI_LED_NEW:
/* all others */
+ if (unlikely(led >= TPACPI_LED_NUMLEDS))
+ return -EINVAL;
+ if (unlikely(tpacpi_is_led_restricted(led)))
+ return -EPERM;
if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
led, led_led_arg1[ledstatus]))
rc = -EIO;
@@ -4751,6 +4919,30 @@
kfree(tpacpi_leds);
}
+static int __init tpacpi_init_led(unsigned int led)
+{
+ int rc;
+
+ tpacpi_leds[led].led = led;
+
+ tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
+ tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
+ if (led_supported == TPACPI_LED_570)
+ tpacpi_leds[led].led_classdev.brightness_get =
+ &led_sysfs_get;
+
+ tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
+
+ INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
+
+ rc = led_classdev_register(&tpacpi_pdev->dev,
+ &tpacpi_leds[led].led_classdev);
+ if (rc < 0)
+ tpacpi_leds[led].led_classdev.name = NULL;
+
+ return rc;
+}
+
static int __init led_init(struct ibm_init_struct *iibm)
{
unsigned int i;
@@ -4784,27 +4976,21 @@
}
for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
- tpacpi_leds[i].led = i;
-
- tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set;
- tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set;
- if (led_supported == TPACPI_LED_570)
- tpacpi_leds[i].led_classdev.brightness_get =
- &led_sysfs_get;
-
- tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i];
-
- INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker);
-
- rc = led_classdev_register(&tpacpi_pdev->dev,
- &tpacpi_leds[i].led_classdev);
- if (rc < 0) {
- tpacpi_leds[i].led_classdev.name = NULL;
- led_exit();
- return rc;
+ if (!tpacpi_is_led_restricted(i)) {
+ rc = tpacpi_init_led(i);
+ if (rc < 0) {
+ led_exit();
+ return rc;
+ }
}
}
+#ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
+ if (led_supported != TPACPI_LED_NONE)
+ printk(TPACPI_NOTICE
+ "warning: userspace override of important "
+ "firmware LEDs is enabled\n");
+#endif
return (led_supported != TPACPI_LED_NONE)? 0 : 1;
}
@@ -5340,6 +5526,20 @@
#define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
+/*
+ * ThinkPads can read brightness from two places: EC HBRV (0x31), or
+ * CMOS NVRAM byte 0x5E, bits 0-3.
+ *
+ * EC HBRV (0x31) has the following layout
+ * Bit 7: unknown function
+ * Bit 6: unknown function
+ * Bit 5: Z: honour scale changes, NZ: ignore scale changes
+ * Bit 4: must be set to zero to avoid problems
+ * Bit 3-0: backlight brightness level
+ *
+ * brightness_get_raw returns status data in the HBRV layout
+ */
+
enum {
TP_EC_BACKLIGHT = 0x31,
@@ -5349,108 +5549,164 @@
TP_EC_BACKLIGHT_MAPSW = 0x20,
};
+enum tpacpi_brightness_access_mode {
+ TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */
+ TPACPI_BRGHT_MODE_EC, /* EC control */
+ TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */
+ TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */
+ TPACPI_BRGHT_MODE_MAX
+};
+
static struct backlight_device *ibm_backlight_device;
-static int brightness_mode;
+
+static enum tpacpi_brightness_access_mode brightness_mode =
+ TPACPI_BRGHT_MODE_MAX;
+
static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
static struct mutex brightness_mutex;
-/*
- * ThinkPads can read brightness from two places: EC 0x31, or
- * CMOS NVRAM byte 0x5E, bits 0-3.
- *
- * EC 0x31 has the following layout
- * Bit 7: unknown function
- * Bit 6: unknown function
- * Bit 5: Z: honour scale changes, NZ: ignore scale changes
- * Bit 4: must be set to zero to avoid problems
- * Bit 3-0: backlight brightness level
- *
- * brightness_get_raw returns status data in the EC 0x31 layout
- */
-static int brightness_get_raw(int *status)
+/* NVRAM brightness access,
+ * call with brightness_mutex held! */
+static unsigned int tpacpi_brightness_nvram_get(void)
{
- u8 lec = 0, lcmos = 0, level = 0;
+ u8 lnvram;
- if (brightness_mode & 1) {
- if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
- return -EIO;
- level = lec & TP_EC_BACKLIGHT_LVLMSK;
- };
- if (brightness_mode & 2) {
- lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
- & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
- >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
- lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
- level = lcmos;
- }
+ lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
+ & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
+ >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
+ lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
- if (brightness_mode == 3) {
- *status = lec; /* Prefer EC, CMOS is just a backing store */
- lec &= TP_EC_BACKLIGHT_LVLMSK;
- if (lec == lcmos)
- tp_warned.bright_cmos_ec_unsync = 0;
- else {
- if (!tp_warned.bright_cmos_ec_unsync) {
- printk(TPACPI_ERR
- "CMOS NVRAM (%u) and EC (%u) do not "
- "agree on display brightness level\n",
- (unsigned int) lcmos,
- (unsigned int) lec);
- tp_warned.bright_cmos_ec_unsync = 1;
- }
+ return lnvram;
+}
+
+static void tpacpi_brightness_checkpoint_nvram(void)
+{
+ u8 lec = 0;
+ u8 b_nvram;
+
+ if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
+ return;
+
+ vdbg_printk(TPACPI_DBG_BRGHT,
+ "trying to checkpoint backlight level to NVRAM...\n");
+
+ if (mutex_lock_killable(&brightness_mutex) < 0)
+ return;
+
+ if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
+ goto unlock;
+ lec &= TP_EC_BACKLIGHT_LVLMSK;
+ b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
+
+ if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
+ >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
+ /* NVRAM needs update */
+ b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
+ TP_NVRAM_POS_LEVEL_BRIGHTNESS);
+ b_nvram |= lec;
+ nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
+ dbg_printk(TPACPI_DBG_BRGHT,
+ "updated NVRAM backlight level to %u (0x%02x)\n",
+ (unsigned int) lec, (unsigned int) b_nvram);
+ } else
+ vdbg_printk(TPACPI_DBG_BRGHT,
+ "NVRAM backlight level already is %u (0x%02x)\n",
+ (unsigned int) lec, (unsigned int) b_nvram);
+
+unlock:
+ mutex_unlock(&brightness_mutex);
+}
+
+
+/* call with brightness_mutex held! */
+static int tpacpi_brightness_get_raw(int *status)
+{
+ u8 lec = 0;
+
+ switch (brightness_mode) {
+ case TPACPI_BRGHT_MODE_UCMS_STEP:
+ *status = tpacpi_brightness_nvram_get();
+ return 0;
+ case TPACPI_BRGHT_MODE_EC:
+ case TPACPI_BRGHT_MODE_ECNVRAM:
+ if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
return -EIO;
- }
- } else {
- *status = level;
+ *status = lec;
+ return 0;
+ default:
+ return -ENXIO;
}
+}
+
+/* call with brightness_mutex held! */
+/* do NOT call with illegal backlight level value */
+static int tpacpi_brightness_set_ec(unsigned int value)
+{
+ u8 lec = 0;
+
+ if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
+ return -EIO;
+
+ if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
+ (lec & TP_EC_BACKLIGHT_CMDMSK) |
+ (value & TP_EC_BACKLIGHT_LVLMSK))))
+ return -EIO;
+
+ return 0;
+}
+
+/* call with brightness_mutex held! */
+static int tpacpi_brightness_set_ucmsstep(unsigned int value)
+{
+ int cmos_cmd, inc;
+ unsigned int current_value, i;
+
+ current_value = tpacpi_brightness_nvram_get();
+
+ if (value == current_value)
+ return 0;
+
+ cmos_cmd = (value > current_value) ?
+ TP_CMOS_BRIGHTNESS_UP :
+ TP_CMOS_BRIGHTNESS_DOWN;
+ inc = (value > current_value) ? 1 : -1;
+
+ for (i = current_value; i != value; i += inc)
+ if (issue_thinkpad_cmos_command(cmos_cmd))
+ return -EIO;
return 0;
}
/* May return EINTR which can always be mapped to ERESTARTSYS */
-static int brightness_set(int value)
+static int brightness_set(unsigned int value)
{
- int cmos_cmd, inc, i, res;
- int current_value;
- int command_bits;
+ int res;
if (value > ((tp_features.bright_16levels)? 15 : 7) ||
value < 0)
return -EINVAL;
+ vdbg_printk(TPACPI_DBG_BRGHT,
+ "set backlight level to %d\n", value);
+
res = mutex_lock_killable(&brightness_mutex);
if (res < 0)
return res;
- res = brightness_get_raw(¤t_value);
- if (res < 0)
- goto errout;
-
- command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
- current_value &= TP_EC_BACKLIGHT_LVLMSK;
-
- cmos_cmd = value > current_value ?
- TP_CMOS_BRIGHTNESS_UP :
- TP_CMOS_BRIGHTNESS_DOWN;
- inc = (value > current_value)? 1 : -1;
-
- res = 0;
- for (i = current_value; i != value; i += inc) {
- if ((brightness_mode & 2) &&
- issue_thinkpad_cmos_command(cmos_cmd)) {
- res = -EIO;
- goto errout;
- }
- if ((brightness_mode & 1) &&
- !acpi_ec_write(TP_EC_BACKLIGHT,
- (i + inc) | command_bits)) {
- res = -EIO;
- goto errout;;
- }
+ switch (brightness_mode) {
+ case TPACPI_BRGHT_MODE_EC:
+ case TPACPI_BRGHT_MODE_ECNVRAM:
+ res = tpacpi_brightness_set_ec(value);
+ break;
+ case TPACPI_BRGHT_MODE_UCMS_STEP:
+ res = tpacpi_brightness_set_ucmsstep(value);
+ break;
+ default:
+ res = -ENXIO;
}
-errout:
mutex_unlock(&brightness_mutex);
return res;
}
@@ -5459,21 +5715,34 @@
static int brightness_update_status(struct backlight_device *bd)
{
- /* it is the backlight class's job (caller) to handle
- * EINTR and other errors properly */
- return brightness_set(
+ unsigned int level =
(bd->props.fb_blank == FB_BLANK_UNBLANK &&
bd->props.power == FB_BLANK_UNBLANK) ?
- bd->props.brightness : 0);
+ bd->props.brightness : 0;
+
+ dbg_printk(TPACPI_DBG_BRGHT,
+ "backlight: attempt to set level to %d\n",
+ level);
+
+ /* it is the backlight class's job (caller) to handle
+ * EINTR and other errors properly */
+ return brightness_set(level);
}
static int brightness_get(struct backlight_device *bd)
{
int status, res;
- res = brightness_get_raw(&status);
+ res = mutex_lock_killable(&brightness_mutex);
if (res < 0)
- return 0; /* FIXME: teach backlight about error handling */
+ return 0;
+
+ res = tpacpi_brightness_get_raw(&status);
+
+ mutex_unlock(&brightness_mutex);
+
+ if (res < 0)
+ return 0;
return status & TP_EC_BACKLIGHT_LVLMSK;
}
@@ -5523,7 +5792,7 @@
}
if (!brightness_enable) {
- dbg_printk(TPACPI_DBG_INIT,
+ dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
"brightness support disabled by "
"module parameter\n");
return 1;
@@ -5538,20 +5807,38 @@
if (b == 16)
tp_features.bright_16levels = 1;
- if (!brightness_mode) {
- if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
- brightness_mode = 2;
- else
- brightness_mode = 3;
-
- dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
- brightness_mode);
- }
-
- if (brightness_mode > 3)
+ /*
+ * Check for module parameter bogosity, note that we
+ * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
+ * able to detect "unspecified"
+ */
+ if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
return -EINVAL;
- if (brightness_get_raw(&b) < 0)
+ /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
+ if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
+ brightness_mode == TPACPI_BRGHT_MODE_MAX) {
+ if (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) {
+ /*
+ * IBM models that define HBRV probably have
+ * EC-based backlight level control
+ */
+ if (acpi_evalf(ec_handle, NULL, "HBRV", "qd"))
+ /* T40-T43, R50-R52, R50e, R51e, X31-X41 */
+ brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
+ else
+ /* all other IBM ThinkPads */
+ brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
+ } else
+ /* All Lenovo ThinkPads */
+ brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
+
+ dbg_printk(TPACPI_DBG_BRGHT,
+ "selected brightness_mode=%d\n",
+ brightness_mode);
+ }
+
+ if (tpacpi_brightness_get_raw(&b) < 0)
return 1;
if (tp_features.bright_16levels)
@@ -5565,7 +5852,8 @@
printk(TPACPI_ERR "Could not register backlight device\n");
return PTR_ERR(ibm_backlight_device);
}
- vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
+ "brightness is supported\n");
ibm_backlight_device->props.max_brightness =
(tp_features.bright_16levels)? 15 : 7;
@@ -5575,13 +5863,25 @@
return 0;
}
+static void brightness_suspend(pm_message_t state)
+{
+ tpacpi_brightness_checkpoint_nvram();
+}
+
+static void brightness_shutdown(void)
+{
+ tpacpi_brightness_checkpoint_nvram();
+}
+
static void brightness_exit(void)
{
if (ibm_backlight_device) {
- vdbg_printk(TPACPI_DBG_EXIT,
+ vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
"calling backlight_device_unregister()\n");
backlight_device_unregister(ibm_backlight_device);
}
+
+ tpacpi_brightness_checkpoint_nvram();
}
static int brightness_read(char *p)
@@ -5628,6 +5928,9 @@
return -EINVAL;
}
+ tpacpi_disclose_usertask("procfs brightness",
+ "set level to %d\n", level);
+
/*
* Now we know what the final level should be, so we try to set it.
* Doing it this way makes the syscall restartable in case of EINTR
@@ -5641,6 +5944,8 @@
.read = brightness_read,
.write = brightness_write,
.exit = brightness_exit,
+ .suspend = brightness_suspend,
+ .shutdown = brightness_shutdown,
};
/*************************************************************************
@@ -6086,6 +6391,9 @@
default:
return -ENXIO;
}
+
+ vdbg_printk(TPACPI_DBG_FAN,
+ "fan control: set fan control register to 0x%02x\n", level);
return 0;
}
@@ -6163,6 +6471,11 @@
}
mutex_unlock(&fan_mutex);
+
+ if (!rc)
+ vdbg_printk(TPACPI_DBG_FAN,
+ "fan control: set fan control register to 0x%02x\n",
+ s);
return rc;
}
@@ -6199,6 +6512,9 @@
rc = -ENXIO;
}
+ if (!rc)
+ vdbg_printk(TPACPI_DBG_FAN,
+ "fan control: set fan control register to 0\n");
mutex_unlock(&fan_mutex);
return rc;
@@ -6327,6 +6643,9 @@
if (parse_strtoul(buf, 2, &t))
return -EINVAL;
+ tpacpi_disclose_usertask("hwmon pwm1_enable",
+ "set fan mode to %lu\n", t);
+
switch (t) {
case 0:
level = TP_EC_FAN_FULLSPEED;
@@ -6392,6 +6711,9 @@
if (parse_strtoul(buf, 255, &s))
return -EINVAL;
+ tpacpi_disclose_usertask("hwmon pwm1",
+ "set fan speed to %lu\n", s);
+
/* scale down from 0-255 to 0-7 */
newlevel = (s >> 5) & 0x07;
@@ -6458,6 +6780,8 @@
fan_watchdog_maxinterval = t;
fan_watchdog_reset();
+ tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
+
return count;
}
@@ -6479,7 +6803,8 @@
{
int rc;
- vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
+ "initializing fan subdriver\n");
mutex_init(&fan_mutex);
fan_status_access_mode = TPACPI_FAN_NONE;
@@ -6538,7 +6863,8 @@
}
}
- vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
+ vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
+ "fan is %s, modes %d, %d\n",
str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
fan_control_access_mode != TPACPI_FAN_WR_NONE),
fan_status_access_mode, fan_control_access_mode);
@@ -6547,7 +6873,7 @@
if (!fan_control_allowed) {
fan_control_access_mode = TPACPI_FAN_WR_NONE;
fan_control_commands = 0;
- dbg_printk(TPACPI_DBG_INIT,
+ dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
"fan control features disabled by parameter\n");
}
@@ -6576,7 +6902,7 @@
static void fan_exit(void)
{
- vdbg_printk(TPACPI_DBG_EXIT,
+ vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
"cancelling any pending fan watchdog tasks\n");
/* FIXME: can we really do this unconditionally? */
@@ -6757,6 +7083,9 @@
if (*rc == -ENXIO)
printk(TPACPI_ERR "level command accepted for unsupported "
"access mode %d", fan_control_access_mode);
+ else if (!*rc)
+ tpacpi_disclose_usertask("procfs fan",
+ "set level to %d\n", level);
return 1;
}
@@ -6770,6 +7099,8 @@
if (*rc == -ENXIO)
printk(TPACPI_ERR "enable command accepted for unsupported "
"access mode %d", fan_control_access_mode);
+ else if (!*rc)
+ tpacpi_disclose_usertask("procfs fan", "enable\n");
return 1;
}
@@ -6783,6 +7114,8 @@
if (*rc == -ENXIO)
printk(TPACPI_ERR "disable command accepted for unsupported "
"access mode %d", fan_control_access_mode);
+ else if (!*rc)
+ tpacpi_disclose_usertask("procfs fan", "disable\n");
return 1;
}
@@ -6801,6 +7134,9 @@
if (*rc == -ENXIO)
printk(TPACPI_ERR "speed command accepted for unsupported "
"access mode %d", fan_control_access_mode);
+ else if (!*rc)
+ tpacpi_disclose_usertask("procfs fan",
+ "set speed to %d\n", speed);
return 1;
}
@@ -6814,8 +7150,12 @@
if (interval < 0 || interval > 120)
*rc = -EINVAL;
- else
+ else {
fan_watchdog_maxinterval = interval;
+ tpacpi_disclose_usertask("procfs fan",
+ "set watchdog timer to %d\n",
+ interval);
+ }
return 1;
}
@@ -7244,10 +7584,10 @@
MODULE_PARM_DESC(fan_control,
"Enables setting fan parameters features when true");
-module_param_named(brightness_mode, brightness_mode, int, 0);
+module_param_named(brightness_mode, brightness_mode, uint, 0);
MODULE_PARM_DESC(brightness_mode,
"Selects brightness control strategy: "
- "0=auto, 1=EC, 2=CMOS, 3=both");
+ "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
module_param(brightness_enable, uint, 0);
MODULE_PARM_DESC(brightness_enable,
@@ -7517,9 +7857,6 @@
return 0;
}
-/* Please remove this in year 2009 */
-MODULE_ALIAS("ibm_acpi");
-
MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
/*
