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path: root/include/linux/i8042.h
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2016-07-28Input: i8042 - break load dependency between atkbd/psmouse and i8042Dmitry Torokhov1-6/+0
As explained in 1407814240-4275-1-git-send-email-decui@microsoft.com we have a hard load dependency between i8042 and atkbd which prevents keyboard from working on Gen2 Hyper-V VMs. > hyperv_keyboard invokes serio_interrupt(), which needs a valid serio > driver like atkbd.c. atkbd.c depends on libps2.c because it invokes > ps2_command(). libps2.c depends on i8042.c because it invokes > i8042_check_port_owner(). As a result, hyperv_keyboard actually > depends on i8042.c. > > For a Generation 2 Hyper-V VM (meaning no i8042 device emulated), if a > Linux VM (like Arch Linux) happens to configure CONFIG_SERIO_I8042=m > rather than =y, atkbd.ko can't load because i8042.ko can't load(due to > no i8042 device emulated) and finally hyperv_keyboard can't work and > the user can't input: https://bugs.archlinux.org/task/39820 > (Ubuntu/RHEL/SUSE aren't affected since they use CONFIG_SERIO_I8042=y) To break the dependency we move away from using i8042_check_port_owner() and instead allow serio port owner specify a mutex that clients should use to serialize PS/2 command stream. Reported-by: Mark Laws <mdl@60hz.org> Tested-by: Mark Laws <mdl@60hz.org> Cc: stable@vger.kernel.org Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2013-08-26Input: add driver for slidebar on Lenovo IdeaPad laptopsAndrey Moiseev1-0/+24
This driver adds support for slidebars found on some Lenovo IdeaPad laptops (the slidebars work with SlideNav/Desktop Navigator under Windows). Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=16004 Registers 'IdeaPad Slidebar' input device and /sys/devices/platform/ideapad_slidebar/slidebar_mode for switching slidebar's modes. Now works on: IdeaPad Y550, Y550P. May work on (testing and adding new models is needed): Ideapad Y560, Y460, Y450, Y650, and, probably, some others. Signed-off-by: Andrey Moiseev <o2g.org.ru@gmail.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2010-06-30Input: i8042 - mark stubs in i8042.h "static inline"Feng Tang1-6/+6
Otherwise we may run into following: drivers/platform/built-in.o: In function `i8042_lock_chip': /home/test/ws2/projects/linux-2.6/include/linux/i8042.h:50: multiple definition of `i8042_lock_chip' drivers/input/serio/built-in.o:/home/test/ws2/projects/linux-2.6/include/linux/i8042.h:50: first defined here ... make[1]: *** [drivers/built-in.o] Error 1 make: *** [drivers] Error 2 Signed-off-by: Feng Tang <feng.tang@intel.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2009-12-12Input: i8042 - allow installing platform filters for incoming dataMatthew Garrett1-1/+17
Some hardware (such as Dell laptops) signal a variety of events through the i8042 controller, even if these don't map to keyboard events. Add support for drivers to filter the i8042 event stream in order to respond to these events and (if appropriate) block them from entering the input stream. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2009-09-18Input: libps2 - additional locking for i8042 portsDmitry Torokhov1-0/+30
The serio ports on i8042 are not completely isolated; while we provide enough locking to ensure proper serialization when accessing control and data registers AUX and KBD ports can still have an effect on each other on PS/2 protocol level. The most prominent effect is that issuing a command for the device connected to one port may cause abort of the command currently executing by the device connected to another port. Since i8042 nor serio subsystem are not aware of the details of the PS/2 protocol (length of the commands and their replies and so on) the locking should be done on libps2 level by adding special handling when we see that we are dealing with serio port on i8042. Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2007-10-22Input: i8042 - export i8042_command()Márton Németh1-0/+35
Export the i8042_command() function which manages the mutual exclusion with the help of the i8042_lock spinlock. This allows to access i8042 safely from other parts of the kernel. Signed-off-by: Márton Németh <nm127@freemail.hu> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>