Fix some confusing comments in drivers/media/IR/*
Signed-off-by: NDavid Härdeman <david@hardeman.nu>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/IR/ir-keytable.c would alloc a suitably sized keymap table
only to have it resized as it is populated with the initial keymap.
Signed-off-by: NDavid Härdeman <david@hardeman.nu>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Fix a double initialization of the same spinlock in drivers/media/IR/rc-map.c.
Signed-off-by: NDavid Härdeman <david@hardeman.nu>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Driver is not properly initializing u64 constants on 32 bit systems:
drivers/media/IR/imon.c:301: warning: integer constant is too large for ‘long’ type
drivers/media/IR/imon.c:302: warning: integer constant is too large for ‘long’ type
drivers/media/IR/imon.c:304: warning: integer constant is too large for ‘long’ type
drivers/media/IR/imon.c:305: warning: integer constant is too large for ‘long’ type
drivers/media/IR/imon.c:308: warning: integer constant is too large for ‘long’ type
drivers/media/IR/imon.c:309: warning: integer constant is too large for ‘long’ type
drivers/media/IR/imon.c:310: warning: integer constant is too large for ‘long’ type

Fix also a few troubles at error printk handling:
drivers/media/IR/imon.c: In function ‘imon_init_intf0’:
drivers/media/IR/imon.c:1909: warning: ‘ret’ may be used uninitialized in this function
drivers/media/IR/imon.c: In function ‘imon_init_intf1’:
drivers/media/IR/imon.c:1989: warning: ‘ret’ may be used uninitialized in this function

Cc: Jarod Wilson <jarod@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This patch adds a Sony12/15/20 decoder to ir-core.
Signed-off-by: NDavid Härdeman <david@hardeman.nu>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This patch adds a JVC decoder to ir-core.
Signed-off-by: NDavid Härdeman <david@hardeman.nu>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

As reported by checkpatch.pl:

ERROR: open brace '{' following function declarations go on the next line
+static inline bool geq_margin(unsigned d1, unsigned d2, unsigned margin) {

ERROR: open brace '{' following function declarations go on the next line
+static inline bool eq_margin(unsigned d1, unsigned d2, unsigned margin) {

ERROR: open brace '{' following function declarations go on the next line
+static inline bool is_transition(struct ir_raw_event *x, struct ir_raw_event *y) {

Cc: David Härdeman <david@hardeman.nu>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This patch implements the agreed upon 1:31 integer encoded pulse/duration
struct for ir-core raw decoders. All decoders have been tested after the
change. Comments are welcome.
Signed-off-by: NDavid Härdeman <david@hardeman.nu>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This is a new driver for the SoundGraph iMON and Antec Veris IR/display
devices commonly found in many home theater pc cases and as after-market
case additions.

[mchehab@redhat.com: add KERN_CONT on line 2098 to shutup checkpatc.pl]
Signed-off-by: NJarod Wilson <jarod@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This adds the keymaps for the hardware decode scancodes imon
devices create for their native imon pad (and mini) remotes,
and the hardware scancodes generated by the imon devices when
used with an rc6 windows media center ed. remote.
Signed-off-by: NJarod Wilson <jarod@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The imon driver I've previously submitted and have been porting to
use ir-core needs to use ir_g_keycode_from_table, as ir_keydown is
not sufficient, due to these things having really oddball hardware
decoders in them. This just moves the function declaration from
ir-core-priv.h over to ir-core.h.
Signed-off-by: NJarod Wilson <jarod@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Instead of removing an entry, the logic were doing both a deletion and
a key addition, as shown by the log:

[11517.323314] ir_getkeycode: unknown key for scancode 0x0050
[11517.326529] ir_do_setkeycode: #80: Deleting scan 0x0050
[11517.326529] ir_do_setkeycode: #80: New scan 0x0050 with key 0x0000
[11517.340598] ir_getkeycode: unknown key for scancode 0x0051
[11517.343811] ir_do_setkeycode: #81: Deleting scan 0x0051
[11517.343811] ir_do_setkeycode: #81: New scan 0x0051 with key 0x0000
[11517.357889] ir_getkeycode: unknown key for scancode 0x0052
[11517.361104] ir_do_setkeycode: #82: Deleting scan 0x0052
[11517.361104] ir_do_setkeycode: #82: New scan 0x0052 with key 0x0000
[11517.375453] ir_getkeycode: unknown key for scancode 0x0053
[11517.378474] ir_do_setkeycode: #83: Deleting scan 0x0053
[11517.378474] ir_do_setkeycode: #83: New scan 0x0053 with key 0x0000
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

There's no need to use quotation marks at the uevent names for the
driver and table.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

As Adreas pointed, RC6 should use CONFIG_IR_RC6_DECODER_MODULE, instead
of the RC5 config option.

Thanks-to: Andreas Oberitter <obi@linuxtv.org>
Acked-by: NDavid Härdeman <david@hardeman.nu>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This patch adds an RC6 decoder (modes 0 and 6A) to ir-core.
Signed-off-by: NDavid Härdeman <david@hardeman.nu>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This patch adds NECx support to drivers/media/IR/ir-nec-decoder.c
Signed-off-by: NDavid Härdeman <david@hardeman.nu>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This patch adds RC5x support to drivers/media/IR/ir-rc5-decoder.c
Signed-off-by: NDavid Härdeman <david@hardeman.nu>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/IR/ir-raw-event.c:55: warning: ‘wq_load’ defined but not used
drivers/media/IR/ir-raw-event.c:222: warning: ‘init_decoders’ defined but not used
drivers/media/IR/rc-map.c: In function ‘get_rc_map’:
drivers/media/IR/rc-map.c:40: warning: unused variable ‘rc’
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

ir-core.h has the kABI to be used by the bridge drivers, when needing to register
IR protocols and pass IR events. However, the same file also contains IR subsystem
internal calls, meant to be used inside ir-core and between ir-core and the raw
decoders.

Better to move those functions to an internal header, for some reasons:

1) Header will be a little more cleaner;

2) It avoids the need of recompile everything (bridge/hardware drivers, etc),
   just because a new decoder were added, or some other internal change were needed;

3) Better organize the ir-core API, splitting the functions that are internal to
   IR core and the ancillary drivers (decoders, lirc_dev) from the features that
   should be exported to IR subsystem clients.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/IR/ir-raw-event.c is currently written with the assumption
that all "raw" hardware will generate events only on state change (i.e.
when a pulse or space starts).

However, some hardware (like mceusb, probably the most popular IR receiver
out there) only generates duration data (and that data is buffered so using
any kind of timing on the data is futile).

Furthermore, using signed int's to represent pulse/space durations is a
well-known approach when writing ir decoders.

With this patch:

- s64 int's are used to represent pulse/space durations in ns

- a workqueue is used to decode the ir protocols outside of interrupt context

- #defines are added to make decoders clearer

- decoder reset is implemented by passing a zero duration to the kfifo queue
  and decoders are updated accordingly
Signed-off-by: NDavid Härdeman <david@hardeman.nu>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/IR/ir-sysfs.c: In function ‘store_protocol’:
drivers/media/IR/ir-sysfs.c:93: warning: suggest parentheses around assignment used as truth value
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Hardware decoders have a more limited set of decoders than software ones.
In general, they support just one protocol at a given time, but allow
changing between a few options.

Rename the previous badly named "current_protocol" as just "protocol",
meaning the current protocol(s) accepted by the driver, and
add a "support_protocols" to represent the entire universe of supported
protocols by that specific hardware.

As commented on http://lwn.net/Articles/378884/, the "one file, one value"
rule doesn't fit nor does make much sense for bitmap or enum values. So, the
supported_protocols will enum all supported protocols, and the protocol
will present all active protocols.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Some devices have in-hardware Remote Controller decoder, while others
need a software decoder to get the IR code. As each software decoder
can be enabled/disabled individually, allowing multiple protocol
decoding capability.

On the other hand, hardware decoders have a limited protocol
support, often being able of decoding just one protocol each time.
So, each type needs a different set of capabilities to control the
supported protocol(s).
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

When the remote controller class is anyway being renamed from ir to rc
this would be a good time to also rename the devices from rcrcvX to rcX.

I know we haven't reached any agreement on whether transmission will
eventually be handled by the same device, but this change will at
least make the device name non-receive-specific which will make it
possible in the future (and if a different approach is finally
agreed upon, the device name still works).
Signed-off-by: NDavid Härdeman <david@hardeman.nu>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Some spinlocks are not properly initialized on ir core:

[  471.714132] BUG: spinlock bad magic on CPU#0, modprobe/1899
[  471.719838]  lock: f92a08ac, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0
[  471.727301] Pid: 1899, comm: modprobe Not tainted 2.6.33 #36
[  471.733062] Call Trace:
[  471.735537]  [<c1498793>] ? printk+0x1d/0x22
[  471.739866]  [<c12694e3>] spin_bug+0xa3/0xf0
[  471.744224]  [<c126962d>] do_raw_spin_lock+0x7d/0x160
[  471.749364]  [<f92a01ff>] ? ir_rc5_register+0x6f/0xf0 [ir_rc5_decoder]

So, use static initialization for the static spinlocks, instead of the
dynamic ones (currently used), as proposed by David Härdeman on one
of his RFC patches.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Reimplement the RC-5 decoder state machine. Code is now clear, and works
properly. It is also simpler than the previous implementations.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

A previous cleanup patch removed more than needed. Re-add the logic that
disable the decoders.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

A few hardware Remote Controller decoders, even using a standard protocol,
aren't able to provide the entire scancode. Due to that, the capability
of using other IR's are limited on those hardware.

Adds a way to indicate to ir-core what are the bits that the hardware
provides, from a scancode, allowing the addition of a complete IR table
to the kernel and allowing a limited support for changing the Remote
Controller on those devices.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Now that the decoders are state machine, there's no need to create
an ancillary buffer while decoding the protocol. Just call the decoders
code directly, event by event.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This decoder is also based on a state machine, just like the NEC protocol
decoder. It is pedantic in the sense that accepts only 14 bits. As there
are some variants that outputs less bits, it needs to be improved to also
handle those.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Remove dead code and properly name a few constants
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Thanks to Andy Walls <awalls@md.metrocast.net> for pointing me his
code, that gave me some ideas to better implement it.

After some work with saa7134 bits, I found a way to catch both IRQ
edge pulses. By enabling it, the NEC decoder can now take both
pulse and spaces into account, making it more precise.

Instead of the old strategy of handling the events all at once,
this code implements a state machine. Due to that, it handles
individual pulse or space events, validating them against the
protocol, producing a much more reliable decoding.

With the new implementation, the protocol trailer bits are properly
handled, making possible for the repeat key to work.

Also, the code is now capable of handling both NEC and NEC extended
IR devices. With NEC, it produces a 16 bits code, while with NEC
extended, a 24 bits code is returned.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Rewrites the keyup/keydown logic in drivers/media/IR/ir-keytable.c.

All knowledge of keystates etc is now internal to ir-keytable.c
and not scattered around ir-raw-event.c and ir-nec-decoder.c (where
it doesn't belong).

In addition, I've changed the API slightly so that ir_input_dev is
passed as the first argument rather than input_dev. If we're ever
going to support multiple keytables we need to move towards making
ir_input_dev the main interface from a driver POV and obscure away
the input_dev as an implementational detail in ir-core.
Signed-off-by: NDavid Härdeman <david@hardeman.nu>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The attached patch rewrites much of the keytable code in
drivers/media/IR/ir-keytable.c.

The scancodes are now inserted into the array in sorted
order which allows for a binary search on lookup.

The code has also been shrunk by about 150 lines.

In addition it fixes the following bugs:

Any use of ir_seek_table() was racy.

ir_dev->driver_name is leaked between ir_input_register() and
ir_input_unregister().

ir_setkeycode() unconditionally does clear_bit() on dev->keybit
when removing a mapping, but there might be another mapping with
a different scancode and the same keycode.

This version has been updated to incorporate patch feedback from
Mauro Carvalho Chehab.

[mchehab@redhat.com: Fix a conflict with RC keytable breakup patches and input changes]
Signed-off-by: NDavid Härdeman <david@hardeman.nu>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Now that the remote keymaps were broken into separate modules,
get rid of the keycode tables that were hardcoded into ir-common.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Instead of using the ugly keymap sequences, use the new rc-*.ko keymap
files. For now, it is still needed to have one keymap loaded, for the
RC code to work. Later patches will remove this depenency.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

A latter patch will reuse the ir_input_register with a different meaning.
Before it, change all occurrences to a temporary name.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The original Remote Controller approach were very messy: a big file,
that were part of ir-common kernel module, containing 64 different
RC keymap tables, used by the V4L/DVB drivers.

Better to break each RC keymap table into a separate module,
registering them into rc core on a process similar to the fs/nls tables.

As an userspace program is now in charge of loading those tables,
adds an option to allow the complete removal of those tables from
kernelspace.

Yet, on embedded devices like Set Top Boxes and TV sets, maybe the
only available input device is the IR. So, we should keep allowing
the usage of in-kernel tables, but a latter patch should change
the default to 'n', after giving some time for distros to add
the v4l-utils with the ir-keytable program, to allow the table
load via userspace.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>