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Diffstat (limited to 'Documentation/laptops/toshiba_haps.txt')
| -rw-r--r-- | Documentation/laptops/toshiba_haps.txt | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/Documentation/laptops/toshiba_haps.txt b/Documentation/laptops/toshiba_haps.txt deleted file mode 100644 index 0c1d88dedbde..000000000000 --- a/Documentation/laptops/toshiba_haps.txt +++ /dev/null @@ -1,76 +0,0 @@ -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" officially, -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. |