01/01: [I8042PRT] Enable keyboard clock explicitly (fixes Lenovo ACPI bug). CORE-14256 (#434)

[Nikita Krapivin]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=10645167b8cf68a21e1944...

commit 10645167b8cf68a21e1944444c6278d9c92835c4
Author:     Nikita Krapivin [e-mail]
AuthorDate: Thu Mar 22 02:07:30 2018 +0500
Commit:     Hermès BÉLUSCA - MAÏTO [e-mail]
CommitDate: Wed Mar 21 22:07:30 2018 +0100

[I8042PRT] Enable keyboard clock explicitly (fixes Lenovo ACPI bug). CORE-14256 (#434)
---
 drivers/input/i8042prt/i8042prt.h | 2 ++
 drivers/input/i8042prt/pnp.c      | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/drivers/input/i8042prt/i8042prt.h b/drivers/input/i8042prt/i8042prt.h
index acae330ecc..71be982326 100644
--- a/drivers/input/i8042prt/i8042prt.h
+++ b/drivers/input/i8042prt/i8042prt.h
@@ -223,6 +223,8 @@ typedef struct _I8042_HOOK_WORKITEM
 #define MOUSE_ENAB         0xA8
 #define MOUSE_LINE_TEST    0xA9
 #define CTRL_SELF_TEST     0xAA
+#define KBD_CLK_DISABLE    0xAD
+#define KBD_CLK_ENABLE     0xAE
 #define CTRL_WRITE_MOUSE   0xD4

/*-----------------------------------------------------
diff --git a/drivers/input/i8042prt/pnp.c b/drivers/input/i8042prt/pnp.c
index b95dc9a98a..e5fe57b208 100644
--- a/drivers/input/i8042prt/pnp.c
+++ b/drivers/input/i8042prt/pnp.c
@@ -274,6 +274,10 @@ i8042ConnectKeyboardInterrupt(
     TRACE_(I8042PRT, "i8042ConnectKeyboardInterrupt()\n");

PortDeviceExtension = DeviceExtension->Common.PortDeviceExtension;
+
+    // Enable keyboard clock line
+    i8042Write(PortDeviceExtension, PortDeviceExtension->ControlPort, KBD_CLK_ENABLE);
+
     DirqlMax = MAX(
         PortDeviceExtension->KeyboardInterrupt.Dirql,
         PortDeviceExtension->MouseInterrupt.Dirql);