diff options
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/x86/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/platform/x86/hp_accel.c | 44 |
2 files changed, 45 insertions, 0 deletions
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 4dcfb7116a04..a2eabe6ff9ad 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -202,6 +202,7 @@ config TC1100_WMI config HP_ACCEL tristate "HP laptop accelerometer" depends on INPUT && ACPI + depends on SERIO_I8042 select SENSORS_LIS3LV02D select NEW_LEDS select LEDS_CLASS diff --git a/drivers/platform/x86/hp_accel.c b/drivers/platform/x86/hp_accel.c index 13e14ec1d3d7..6bec745b6b92 100644 --- a/drivers/platform/x86/hp_accel.c +++ b/drivers/platform/x86/hp_accel.c @@ -37,6 +37,8 @@ #include <linux/leds.h> #include <linux/atomic.h> #include <linux/acpi.h> +#include <linux/i8042.h> +#include <linux/serio.h> #include "../../misc/lis3lv02d/lis3lv02d.h" #define DRIVER_NAME "hp_accel" @@ -73,6 +75,13 @@ static inline void delayed_sysfs_set(struct led_classdev *led_cdev, /* HP-specific accelerometer driver ------------------------------------ */ +/* e0 25, e0 26, e0 27, e0 28 are scan codes that the accelerometer with acpi id + * HPQ6000 sends through the keyboard bus */ +#define ACCEL_1 0x25 +#define ACCEL_2 0x26 +#define ACCEL_3 0x27 +#define ACCEL_4 0x28 + /* For automatic insertion of the module */ static const struct acpi_device_id lis3lv02d_device_ids[] = { {"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */ @@ -294,6 +303,35 @@ static void lis3lv02d_enum_resources(struct acpi_device *device) printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n"); } +static bool hp_accel_i8042_filter(unsigned char data, unsigned char str, + struct serio *port) +{ + static bool extended; + + if (str & I8042_STR_AUXDATA) + return false; + + if (data == 0xe0) { + extended = true; + return true; + } else if (unlikely(extended)) { + extended = false; + + switch (data) { + case ACCEL_1: + case ACCEL_2: + case ACCEL_3: + case ACCEL_4: + return true; + default: + serio_interrupt(port, 0xe0, 0); + return false; + } + } + + return false; +} + static int lis3lv02d_add(struct acpi_device *device) { int ret; @@ -326,6 +364,11 @@ static int lis3lv02d_add(struct acpi_device *device) if (ret) return ret; + /* filter to remove HPQ6000 accelerometer data + * from keyboard bus stream */ + if (strstr(dev_name(&device->dev), "HPQ6000")) + i8042_install_filter(hp_accel_i8042_filter); + INIT_WORK(&hpled_led.work, delayed_set_status_worker); ret = led_classdev_register(NULL, &hpled_led.led_classdev); if (ret) { @@ -343,6 +386,7 @@ static int lis3lv02d_remove(struct acpi_device *device) if (!device) return -EINVAL; + i8042_remove_filter(hp_accel_i8042_filter); lis3lv02d_joystick_disable(&lis3_dev); lis3lv02d_poweroff(&lis3_dev); |