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Subject[PATCH 4/4] msi-laptop: Add i8042 filter to sync sw state with BIOS when function key pressed
From: Lee, Chun-Yi <jlee@novell.com>

There have some MSI netbook change devices state by EC when user press
wlan/bluetooth/wwan function keys. So, add a i8042 filter to sync sw
state with BIOS when function keys pressed.

Signed-off-by: Lee, Chun-Yi <jlee@novell.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
v2 - fixed some things Dmitry pointed out - gregkh
drivers/platform/x86/msi-laptop.c | 59 ++++++++++++++++++++++++++++++++++++-
1 files changed, 58 insertions(+), 1 deletions(-)
diff --git a/drivers/platform/x86/msi-laptop.c b/drivers/platform/x86/msi-laptop.c
index 34bec2e..0b17590 100644
--- a/drivers/platform/x86/msi-laptop.c
+++ b/drivers/platform/x86/msi-laptop.c
@@ -59,6 +59,7 @@
#include <linux/backlight.h>
#include <linux/platform_device.h>
#include <linux/rfkill.h>
+#include <linux/i8042.h>

#define MSI_DRIVER_VERSION "0.5"

@@ -581,6 +582,46 @@ static void rfkill_cleanup(void)
}
}

+static void msi_update_rfkill(struct work_struct *ignored)
+{
+ get_wireless_state_ec_standard();
+
+ if (rfk_wlan)
+ rfkill_set_sw_state(rfk_wlan, !wlan_s);
+ if (rfk_bluetooth)
+ rfkill_set_sw_state(rfk_bluetooth, !bluetooth_s);
+ if (rfk_threeg)
+ rfkill_set_sw_state(rfk_threeg, !threeg_s);
+}
+static DECLARE_DELAYED_WORK(msi_rfkill_work, msi_update_rfkill);
+
+static bool msi_laptop_i8042_filter(unsigned char data, unsigned char str,
+ struct serio *port)
+{
+ static bool extended;
+
+ if (str & 0x20)
+ return false;
+
+ /* 0x54 wwan, 0x62 bluetooth, 0x76 wlan*/
+ if (unlikely(data == 0xe0)) {
+ extended = true;
+ return false;
+ } else if (unlikely(extended)) {
+ switch (data) {
+ case 0x54:
+ case 0x62:
+ case 0x76:
+ schedule_delayed_work(&msi_rfkill_work,
+ round_jiffies_relative(0.5 * HZ));
+ break;
+ }
+ extended = false;
+ }
+
+ return false;
+}
+
static void msi_init_rfkill(struct work_struct *ignored)
{
if (rfk_wlan) {
@@ -706,9 +747,24 @@ static int load_scm_model_init(struct platform_device *sdev)
/* initial rfkill */
result = rfkill_init(sdev);
if (result < 0)
- return result;
+ goto fail_rfkill;
+
+ result = i8042_install_filter(msi_laptop_i8042_filter);
+ if (result) {
+ printk(KERN_ERR
+ "msi-laptop: Unable to install key filter\n");
+ goto fail_filter;
+ }

return 0;
+
+fail_filter:
+ rfkill_cleanup();
+
+fail_rfkill:
+
+ return result;
+
}

static int __init msi_init(void)
@@ -819,6 +875,7 @@ static void __exit msi_cleanup(void)
platform_driver_unregister(&msipf_driver);
backlight_device_unregister(msibl_device);

+ i8042_remove_filter(msi_laptop_i8042_filter);
rfkill_cleanup();

/* Enable automatic brightness control again */

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