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author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-16 19:32:27 +0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-16 19:32:27 +0400 |
commit | 605f884d05cc0de8c3bde36281d58216011f51a5 (patch) | |
tree | 28d62f20b36b059c397bbf8e7e9a033b638990d0 /Documentation | |
parent | 49899007b9401486421c99bb269db89b88136e47 (diff) | |
parent | 186e4e89a0922d75fba476f15b723e541cc34bea (diff) | |
download | linux-605f884d05cc0de8c3bde36281d58216011f51a5.tar.xz |
Merge branch 'for_linus' of git://cavan.codon.org.uk/platform-drivers-x86
Pull x86 platform driver updates from Matthew Garrett:
"A moderate number of changes, but nothing awfully significant.
A lot of const cleanups, some reworking and additions to the rfkill
quirks in the asus driver, a new driver for generating falling laptop
events on Toshibas and some misc fixes.
Maybe vendors have stopped inventing things"
* 'for_linus' of git://cavan.codon.org.uk/platform-drivers-x86: (41 commits)
platform/x86: Enable build support for toshiba_haps
Documentation: Add file about toshiba_haps module
platform/x86: Toshiba HDD Active Protection Sensor
asus-nb-wmi: Add wapf4 quirk for the U32U
alienware-wmi: make hdmi_mux enabled on case-by-case basis
ideapad-laptop: Constify DMI table and other r/o variables
asus-nb-wmi.c: Rename x401u quirk to wapf4
compal-laptop: correct invalid hwmon name
toshiba_acpi: Add Qosmio X75-A to the alt keymap dmi list
toshiba_acpi: Add extra check to backlight code
Fix log message about future removal of interface
ideapad-laptop: Disable touchpad interface on Yoga models
asus-nb-wmi: Add wapf4 quirk for the X550CC
intel_ips: Make ips_mcp_limits variables static
thinkpad_acpi: Mark volume_alsa_control_{vol,mute} as __initdata
fujitsu-laptop: Mark fujitsu_dmi_table[] DMI table as __initconst
hp-wmi: Add missing __init annotations to initialization code
hp_accel: Constify ACPI and DMI tables
fujitsu-tablet: Mark DMI callbacks as __init code
dell-laptop: Mark dell_quirks[] DMI table as __initconst
...
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/laptops/00-INDEX | 2 | ||||
-rw-r--r-- | Documentation/laptops/toshiba_haps.txt | 76 |
2 files changed, 78 insertions, 0 deletions
diff --git a/Documentation/laptops/00-INDEX b/Documentation/laptops/00-INDEX index d399ae1fc724..a3b4f209e562 100644 --- a/Documentation/laptops/00-INDEX +++ b/Documentation/laptops/00-INDEX @@ -18,3 +18,5 @@ sonypi.txt - info on Linux Sony Programmable I/O Device support. thinkpad-acpi.txt - information on the (IBM and Lenovo) ThinkPad ACPI Extras driver. +toshiba_haps.txt + - information on the Toshiba HDD Active Protection Sensor driver. diff --git a/Documentation/laptops/toshiba_haps.txt b/Documentation/laptops/toshiba_haps.txt new file mode 100644 index 000000000000..11dbcfdc9e7a --- /dev/null +++ b/Documentation/laptops/toshiba_haps.txt @@ -0,0 +1,76 @@ +Kernel driver toshiba_haps +Toshiba HDD Active Protection Sensor +==================================== + +Author: Azael Avalos <coproscefalo@gmail.com> + + +0. Contents +----------- + +1. Description +2. Interface +3. Accelerometer axes +4. Supported devices +5. Usage + + +1. Description +-------------- + +This driver provides support for the accelerometer found in various Toshiba +laptops, being called "Toshiba HDD Protection - Shock Sensor" officialy, +and detects laptops automatically with this device. +On Windows, Toshiba provided software monitors this device and provides +automatic HDD protection (head unload) on sudden moves or harsh vibrations, +however, this driver only provides a notification via a sysfs file to let +userspace tools or daemons act accordingly, as well as providing a sysfs +file to set the desired protection level or sensor sensibility. + + +2. Interface +------------ + +This device comes with 3 methods: +_STA - Checks existence of the device, returning Zero if the device does not + exists or is not supported. +PTLV - Sets the desired protection level. +RSSS - Shuts down the HDD protection interface for a few seconds, + then restores normal operation. + +Note: +The presence of Solid State Drives (SSD) can make this driver to fail loading, +given the fact that such drives have no movable parts, and thus, not requiring +any "protection" as well as failing during the evaluation of the _STA method +found under this device. + + +3. Accelerometer axes +--------------------- + +This device does not report any axes, however, to query the sensor position +a couple HCI (Hardware Configuration Interface) calls (0x6D and 0xA6) are +provided to query such information, handled by the kernel module toshiba_acpi +since kernel version 3.15. + + +4. Supported devices +-------------------- + +This driver binds itself to the ACPI device TOS620A, and any Toshiba laptop +with this device is supported, given the fact that they have the presence of +conventional HDD and not only SSD, or a combination of both HDD and SSD. + + +5. Usage +-------- + +The sysfs files under /sys/devices/LNXSYSTM:00/LNXSYBUS:00/TOS620A:00/ are: +protection_level - The protection_level is readable and writeable, and + provides a way to let userspace query the current protection + level, as well as set the desired protection level, the + available protection levels are: + 0 - Disabled | 1 - Low | 2 - Medium | 3 - High +reset_protection - The reset_protection entry is writeable only, being "1" + the only parameter it accepts, it is used to trigger + a reset of the protection interface. |