The rfkill interface on Dells only sends a notification that the switch
has been changed via the keyboard controller. Add a filter so we can
pick these notifications up and update the rfkill state appropriately.
Signed-off-by: Matthew Garrett <mjg@xxxxxxxxxx>
---
drivers/platform/x86/Kconfig | 1 +
drivers/platform/x86/dell-laptop.c | 43 ++++++++++++++++++++++++++++++++++++
2 files changed, 44 insertions(+), 0 deletions(-)
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index 55ca39d..4d42e95 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -79,6 +79,7 @@ config DELL_LAPTOP
depends on BACKLIGHT_CLASS_DEVICE
depends on RFKILL || RFKILL = n
depends on POWER_SUPPLY
+ depends on SERIO_I8042
default n
---help---
This driver adds support for rfkill and backlight control to Dell
diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
index 9061111..0071b56 100644
--- a/drivers/platform/x86/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -22,6 +22,7 @@
#include <linux/rfkill.h>
#include <linux/power_supply.h>
#include <linux/acpi.h>
+#include <linux/i8042.h>
#include "../../firmware/dcdbas.h"
#define BRIGHTNESS_TOKEN 0x7d
@@ -206,6 +207,16 @@ static const struct rfkill_ops dell_rfkill_ops = {
.query = dell_rfkill_query,
};
+static void dell_rfkill_update(void)
+{
+ if (wifi_rfkill)
+ dell_rfkill_query(wifi_rfkill, (void *)1);
+ if (bluetooth_rfkill)
+ dell_rfkill_query(bluetooth_rfkill, (void *)2);
+ if (wwan_rfkill)
+ dell_rfkill_query(wwan_rfkill, (void *)3);
+}
+
static int dell_setup_rfkill(void)
{
struct calling_interface_buffer buffer;
@@ -310,6 +321,29 @@ static struct backlight_ops dell_ops = {
.update_status = dell_send_intensity,
};
+bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
+ struct serio *port)
+{
+ static bool extended;
+
+ if (str & 0x20)
+ return false;
+
+ if (unlikely(data == 0xe0)) {
+ extended = true;
+ return false;
+ } else if (unlikely(extended)) {
+ switch (data) {
+ case 0x8:
+ dell_rfkill_update();
+ break;
+ }
+ extended = false;
+ }
+
+ return false;
+}
+
static int __init dell_init(void)
{
struct calling_interface_buffer buffer;
@@ -333,6 +367,13 @@ static int __init dell_init(void)
goto out;
}
+ ret = i8042_install_filter(dell_laptop_i8042_filter);
+ if (ret) {
+ printk(KERN_WARNING
+ "dell-laptop: Unable to install key filter\n");
+ goto out;
+ }
+
#ifdef CONFIG_ACPI
/* In the event of an ACPI backlight being available, don't
* register the platform controller.
@@ -369,6 +410,7 @@ static int __init dell_init(void)
return 0;
out:
+ i8042_remove_filter(dell_laptop_i8042_filter);
if (wifi_rfkill)
rfkill_unregister(wifi_rfkill);
if (bluetooth_rfkill)
@@ -381,6 +423,7 @@ out:
static void __exit dell_exit(void)
{
+ i8042_remove_filter(dell_laptop_i8042_filter);
backlight_device_unregister(dell_backlight_device);
if (wifi_rfkill)
rfkill_unregister(wifi_rfkill);
--
1.6.5.2
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