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authorLinus Torvalds <torvalds@linux-foundation.org>2014-11-14 14:20:46 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-11-14 14:20:46 -0800
commit5ae93760cbedda64eab0a7012cc3785c32399641 (patch)
tree234554665182ca5f391e081de2a7339b2640ff27 /drivers
parente57c641ffb75b90c7f7637916e390dc837b70917 (diff)
parent0cdbcd6d3ebeffa7d1a475ed7a294315cd046a11 (diff)
Merge tag 'platform-drivers-x86-v3.18-3' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86
Pull x86 platform drivers fixlets from Darren Hart: "Just two patches to remove hp_accel events from the keyboard bus stream via an i8042 filter" * tag 'platform-drivers-x86-v3.18-3' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86: platform: hp_accel: Add SERIO_I8042 as a dependency since it now includes i8042.h/serio.h platform: hp_accel: add a i8042 filter to remove HPQ6000 data from kb bus stream
Diffstat (limited to 'drivers')
-rw-r--r--drivers/platform/x86/Kconfig1
-rw-r--r--drivers/platform/x86/hp_accel.c44
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);

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