Hello all, I've created a patch that enables support for the TOS620A device, an accelerometer device on many Toshiba laptops to detect hard drive shock. Included is a pretty simple ACPI module and will send out notifications via netlink and procfs when the detected state changes. This module will send a value of 0x80 when vibration is detected from the HDAPS device, and 0x81 when the laptop has been stable for about 1-2 seconds. There are 3 different levels of sensitivity set explicitly in ACPI. These are essentially 'low', 'medium', and 'high'. (1, 2, 3 respectively). For the actual parking of the hard drive heads, I then use two separate ACPI2 event files. The first is triggered when vibration is detected: event=HAPS 00000080 action=echo 30000 > /sys/block/sd?/device/unload_heads and to reset: event=HAPS 00000081 action=echo 0 > /sys/block/sd?/device/unload_heads It creates 2 sysfs attributes. The first is 'status', which just returns 1 if the device exists and everything is cool. The second is 'protlevel' which is RW and allows you to view the current protection level or set a new level. Since it is a full module patch, I've included a link to download. Please let me know what you think. Thanks! Signed off by: Nate Nelson <nmn@xxxxxxxxxxxxxxxxxxxx> --- http://www.nathanielmnelson.com/sites/default/files/toshiba_hdaps-3.8.10.patch -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
