Commit Graph

28 Commits

Author SHA1 Message Date
Jiri Kosina 6b7b8e488b Merge branch 'master' into upstream.
This is sync with Linus' tree to receive KEY_IMAGES definition
that went in through input tree.
2011-05-18 17:06:49 +02:00
Bruno Prémont 8c4e708d01 HID: picolcd: Avoid compile warning/error triggered by copy_from_user()
With CONFIG_DEBUG_STRICT_USER_COPY_CHECKS=y compilation of PicoLCD
driver fails on copy_from_user(), without it a warning is generated:

  CC [M]  drivers/hid/hid-picolcd.o
In file included from /usr/src/linux-2.6/arch/x86/include/asm/uaccess.h:571,
                 from /usr/src/linux-2.6/arch/x86/include/asm/sections.h:5,
                 from /usr/src/linux-2.6/arch/x86/include/asm/hw_irq.h:26,
                 from /usr/src/linux-2.6/include/linux/irq.h:359,
                 from /usr/src/linux-2.6/arch/x86/include/asm/hardirq.h:5,
                 from /usr/src/linux-2.6/include/linux/hardirq.h:7,
                 from /usr/src/linux-2.6/include/linux/interrupt.h:12,
                 from /usr/src/linux-2.6/include/linux/usb.h:15,
                 from /usr/src/linux-2.6/drivers/hid/hid-picolcd.c:25:
In function 'copy_from_user',
    inlined from 'picolcd_debug_eeprom_write' at drivers/hid/hid-picolcd.c:1592:
arch/x86/include/asm/uaccess_32.h:212: error: call to 'copy_from_user_overflow' declared with attribute error: copy_from_user() buffer size is not provably correct

gcc-4.4.5 is not able to track size calculation when it is stored into
a variable, thus tell copy_from_user() maximum size via
min(*max-size*, *effective-size*) explicitly and inline how much to copy
at most.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-05-05 13:45:52 +02:00
Lucas De Marchi 25985edced Fix common misspellings
Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-31 11:26:23 -03:00
Matthew Garrett bb7ca747f8 backlight: add backlight type
There may be multiple ways of controlling the backlight on a given
machine.  Allow drivers to expose the type of interface they are
providing, making it possible for userspace to make appropriate policy
decisions.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: David Airlie <airlied@linux.ie>
Cc: Alex Deucher <alexdeucher@gmail.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-22 17:43:59 -07:00
Jiri Kosina a7153258b7 Merge branches 'upstream' and 'upstream-fixes' into for-linus 2011-01-08 01:08:19 +01:00
Jesper Juhl 0fbf8ed976 HID: hid-picolcd: Fix memory leak in picolcd_debug_out_report()
We have a memory leak in drivers/hid/hid-picolcd.c::picolcd_debug_out_report()
in an error path..  We are not always freeing the memory allocated to
'buff' - this patch makes sure we always kfree() what we allocate with
kmalloc() when it is no longer needed.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-01-03 00:11:30 +01:00
David Sterba 86280a2088 HID: picolcd: fix misuse of logical operation in place of bitop
CC: Bruno Prémont <bonbons@linux-vserver.org>
CC: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-12-27 16:38:16 +01:00
Tejun Heo c4ffafa51b HID: hid-picolcd: don't use flush_scheduled_work()
flush_scheduled_work() is deprecated and scheduled to be removed.
Directly flush picolcd_fb_cleanup on exit instead.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-12-11 18:38:20 +01:00
Joe Perches 4291ee305e HID: Add and use hid_<level>: dev_<level> equivalents
Neaten current uses of dev_<level> by adding and using
hid specific hid_<level> macros.

Convert existing uses of dev_<level> uses to hid_<level>.
Convert hid-pidff printk uses to hid_<level>.

Remove err_hid and use hid_err instead.

Add missing newlines to logging messages where necessary.
Coalesce format strings.

Add and use pr_fmt(fmt) KBUILD_MODNAME ": " fmt

Other miscellaneous changes:

Add const struct hid_device * argument to hid-core functions
extract() and implement() so hid_<level> can be used by them.
Fix bad indentation in hid-core hid_input_field function
that calls extract() function above.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-12-10 15:10:38 +01:00
Dmitry Torokhov 5bea7660bb HID: add hid_hw_open/close/power() handlers
Instead of exposing the guts of hid->ll_driver relationship to HID
sub-drivers provide these helpers to encapsulate the details.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-12-08 14:35:14 +01:00
Bruno Prémont 1778ca298b HID: picolcd: correct ordering of framebuffer freeing
Fix the free() ordering (which was never reached due to wrong check).

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-08-06 14:53:10 +02:00
Dan Carpenter a106025015 HID: picolcd: testing the wrong variable
"ref_cnt" is a point to the reference count and it's non-null.  We really
want to test the reference count itself.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-08-06 14:51:10 +02:00
Bruno Prémont 225b459006 HID: picolcd: implement refcounting of framebuffer
As our device may be hot-unplugged and framebuffer cannot handle
this case by itself we need to keep track of usage count so as
to release fb_info and framebuffer memory only after the last user
has closed framebuffer.

We need to do the freeing in a scheduled work as fb_release()
is called with fb_info lock held.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-07-12 18:07:36 +02:00
Bruno Prémont 365f1fcd0d HID: picolcd: do not reallocate memory on depth change
Reallocating memory in depth change does not work well if some
userspace application has mmapped() the framebuffer as that mapping
does not get adjusted (thus application continues to write to old
buffer).
In addition doing deferred_io_cleanup() and init() inside of set_par()
tends to deadlock with fbcon's flashing cursor.

Avoid all this by allocating a buffer that can hold 8bpp framebuffer
and just use 1/8 of it while running at 1bpp.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-07-12 18:07:35 +02:00
Bruno Prémont b70884ff3a HID: picolcd: Add minimal palette required by fbcon on 8bpp
Add a minimal palette so fbcon does not try to dereference
a NULL point when fb is set to 8bpp.

fbcon stores pixels the other way around in bytes for 1bpp
than intially implemented, correct this.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-07-12 18:07:35 +02:00
Bruno Prémont a7c9a0aa17 HID: picolcd: fix deferred_io init/cleanup to fb ordering
Adjust ordering if framebuffer (un)registration and defio init/cleanup
to match the correct order (init defio, register FB ... unregister FB,
cleanup defio)

Acked-by: Jaya Kumar <jayakumar.lkml@gmail.com>
Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-07-11 22:57:17 +02:00
Julia Lawall aeacb6fd30 HID: picolcd: Eliminate use after free
The skip label frees resp, which has not been allocated at the point of
this goto and then does a break, based on the fact that err is non-zero.
This is replaced by a break directly.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@free@
expression E;
position p;
@@
kfree@p(E)

@@
expression free.E, subE<=free.E, E1;
position free.p;
@@

  kfree@p(E)
  ...
(
  subE = E1
|
* E
)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-05-17 10:42:37 +02:00
Bruno Prémont 9d71ea057b HID: add PM support to PicoLCD device
Add PM support in order to turn off backlight on suspend, restore
it on resume and especially restore complete state on reset-resume.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-05-03 15:25:52 +02:00
Bruno Prémont 0b5adf92ec HID: split picolcd's operation_mode sysfs attribute
Original operation_mode sysfs attribute accepts the operation mode
as main value with an option delay as second value to change
the start-up delay on mode change.

As it is preferred to have exactly one value per sysfs attribute,
extract this delay into a separate sysfs attribute called
operation_mode_delay.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-04-27 15:31:26 +02:00
Bruno Prémont 76d17e6ca3 HID: fix picolcd's version parsing
During grouping of version checking code bootloader mode's version
bytes got swapped. Fix their order.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-04-26 11:44:09 +02:00
Bruno Prémont 5435f2818e HID: hid-picolcd depends on LCD_CLASS_DEVICE
HID_PICOLCD should depend on LCD_CLASS_DEVICE, otherwise the
build fails when HID_PICOLCD=y and LCD_CLASS_DEVICE=m:

hid-picolcd.c:(.text+0x84523f): undefined reference to `lcd_device_unregister'
hid-picolcd.c:(.text+0x8478ab): undefined reference to `lcd_device_register'
hid-picolcd.c:(.text+0x84c15f): undefined reference to `lcd_device_unregister'

Same applies to FB, BACKLIGHT_CLASS_DEVICE and LEDS_CLASS.

Add suboptions for those features to handle the deps on kbuild side
and just check HID_PICOLCD_* in the code.

Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-04-11 20:26:46 +02:00
Jiri Kosina eb741103f1 HID: picolcd: fix build failure
Using copy_{to,from}_user requires the include of linux/uaccess.h.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-04-01 08:24:42 +02:00
Bruno Prémont 9bbf2b98ba HID: add experimental access to PicoLCD device's EEPROM and FLASH
The PicoLCD device has a small amount of EEPROM and also provides access
to its FLASH where firmware and splash image are saved.
In flasher mode FLASH access is the only active feature.

Give read/write access to both via debugfs files.

NOTE: EEPROM and FLASH access should be switched to better suited API,
      until then the will reside in debugfs

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-03-31 11:32:31 +02:00
Bruno Prémont 467d652306 HID: add GPO (leds) support to PicoLCD device
Add leds support to PicoLCD device to drive the GPO pins.

GPO support depends on leds class and is only being
compiled if leds class has been selected.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-03-31 11:32:29 +02:00
Bruno Prémont e8d931bb59 HID: add lcd support to PicoLCD device
Add lcd support to PicoLCD device.

LCD support depends on lcd class and is only being
compiled if lcd class has been selected.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-03-31 11:32:26 +02:00
Bruno Prémont f1c2176140 HID: add backlight support to PicoLCD device
Add backlight support to PicoLCD device.

Backlight support depends on backlight class and is only being
compiled if backlight class has been selected.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-03-31 11:32:11 +02:00
Bruno Prémont b8c21cf697 HID: add framebuffer support to PicoLCD device
Add framebuffer support to PicoLCD device with use of deferred-io.

Only changed areas of framebuffer get sent to device in order to
save USB bandwidth and especially resources on PicoLCD device or
allow higher refresh rate for a small area. Changed tiles are
determined while updating shadow framebuffer.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-03-31 11:21:29 +02:00
Bruno Prémont 236db47c2b HID: new driver for PicoLCD device
Add basic driver for PicoLCD graphics device.
Initially support keypad with input device and provide support
for debugging communication via events file from debugfs.

Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-03-31 11:20:59 +02:00