diff options
author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-03-24 20:47:53 -0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-05-18 00:52:59 -0300 |
commit | 995187bed30c0545e8da88372e9807da0a85911e (patch) | |
tree | e3e28eff10f8f01f1bfd7ff865a29076bf6700dc /drivers/media/IR | |
parent | 9f1547829a6f39fe6b2da22653dff40502f3d568 (diff) |
V4L/DVB: ir-core: dynamically load the compiled IR protocols
Instead of hardcoding the protocols into ir-core, add a register interface
for the IR protocol decoders, and convert ir-nec-decoder into a client of
ir-core.
With this approach, it is possible to dynamically load the needed IR protocols,
and to add a RAW IR interface module, registered as one IR raw protocol decoder.
This patch opens a way to register a lirc_dev interface to work as an userspace
IR protocol decoder.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/IR')
-rw-r--r-- | drivers/media/IR/Kconfig | 9 | ||||
-rw-r--r-- | drivers/media/IR/Makefile | 3 | ||||
-rw-r--r-- | drivers/media/IR/ir-nec-decoder.c | 35 | ||||
-rw-r--r-- | drivers/media/IR/ir-raw-event.c | 57 | ||||
-rw-r--r-- | drivers/media/IR/ir-sysfs.c | 7 |
5 files changed, 101 insertions, 10 deletions
diff --git a/drivers/media/IR/Kconfig b/drivers/media/IR/Kconfig index 4dde7d180a32..de410d46ae26 100644 --- a/drivers/media/IR/Kconfig +++ b/drivers/media/IR/Kconfig @@ -7,3 +7,12 @@ config VIDEO_IR tristate depends on IR_CORE default IR_CORE + +config IR_NEC_DECODER + tristate "Enable IR raw decoder for NEC protocol" + depends on IR_CORE + default y + + ---help--- + Enable this option if you have IR with NEC protocol, and + if the IR is decoded in software diff --git a/drivers/media/IR/Makefile b/drivers/media/IR/Makefile index 18794c7b0ea6..6140b2712c8a 100644 --- a/drivers/media/IR/Makefile +++ b/drivers/media/IR/Makefile @@ -1,5 +1,6 @@ ir-common-objs := ir-functions.o ir-keymaps.o -ir-core-objs := ir-keytable.o ir-sysfs.o ir-raw-event.o ir-nec-decoder.o +ir-core-objs := ir-keytable.o ir-sysfs.o ir-raw-event.o obj-$(CONFIG_IR_CORE) += ir-core.o obj-$(CONFIG_VIDEO_IR) += ir-common.o +obj-$(CONFIG_IR_NEC_DECODER) += ir-nec-decoder.o diff --git a/drivers/media/IR/ir-nec-decoder.c b/drivers/media/IR/ir-nec-decoder.c index 104482a6991e..c9a986dd57fd 100644 --- a/drivers/media/IR/ir-nec-decoder.c +++ b/drivers/media/IR/ir-nec-decoder.c @@ -1,4 +1,4 @@ -/* ir-raw-event.c - handle IR Pulse/Space event +/* ir-nec-decoder.c - handle NEC IR Pulse/Space protocol * * Copyright (C) 2010 by Mauro Carvalho Chehab <mchehab@redhat.com> * @@ -147,7 +147,7 @@ static int __ir_nec_decode(struct input_dev *input_dev, if (++count == 32) break; } - *pos++; + (*pos)++; /* * Fixme: may need to accept Extended NEC protocol? @@ -181,9 +181,9 @@ err: * This function returns the number of decoded pulses or -EINVAL if no * pulse got decoded */ -int ir_nec_decode(struct input_dev *input_dev, - struct ir_raw_event *evs, - int len) +static int ir_nec_decode(struct input_dev *input_dev, + struct ir_raw_event *evs, + int len) { int pos = 0; int rc = 0; @@ -198,4 +198,27 @@ int ir_nec_decode(struct input_dev *input_dev, return rc; } -EXPORT_SYMBOL_GPL(ir_nec_decode); +static struct ir_raw_handler nec_handler = { + .decode = ir_nec_decode, +}; + +static int __init ir_nec_decode_init(void) +{ + ir_raw_handler_register(&nec_handler); + + printk(KERN_INFO "IR NEC protocol handler initialized\n"); + return 0; +} + +static void __exit ir_nec_decode_exit(void) +{ + ir_raw_handler_unregister(&nec_handler); +} + +module_init(ir_nec_decode_init); +module_exit(ir_nec_decode_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>"); +MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)"); +MODULE_DESCRIPTION("NEC IR protocol decoder"); diff --git a/drivers/media/IR/ir-raw-event.c b/drivers/media/IR/ir-raw-event.c index 0ae55433cef9..3eae128400ea 100644 --- a/drivers/media/IR/ir-raw-event.c +++ b/drivers/media/IR/ir-raw-event.c @@ -13,10 +13,18 @@ */ #include <media/ir-core.h> +#include <linux/workqueue.h> /* Define the max number of bit transitions per IR keycode */ #define MAX_IR_EVENT_SIZE 256 +/* Used to handle IR raw handler extensions */ +static LIST_HEAD(ir_raw_handler_list); +static DEFINE_MUTEX(ir_raw_handler_lock); + +/* Used to load the decoders */ +static struct work_struct wq_load; + static void ir_keyup_timer(unsigned long data) { struct input_dev *input_dev = (struct input_dev *)data; @@ -101,6 +109,7 @@ int ir_raw_event_handle(struct input_dev *input_dev) int rc; struct ir_raw_event *evs; int len, i; + struct ir_raw_handler *ir_raw_handler; /* * Store the events into a temporary buffer. This allows calling more than @@ -122,10 +131,56 @@ int ir_raw_event_handle(struct input_dev *input_dev) evs[i].type, (evs[i].delta.tv_nsec + 500) / 1000); } - rc = ir_nec_decode(input_dev, evs, len); + /* + * Call all ir decoders. This allows decoding the same event with + * more than one protocol handler. + * FIXME: better handle the returned code: does it make sense to use + * other decoders, if the first one already handled the IR? + */ + list_for_each_entry(ir_raw_handler, &ir_raw_handler_list, list) { + rc = ir_raw_handler->decode(input_dev, evs, len); + } kfree(evs); return rc; } EXPORT_SYMBOL_GPL(ir_raw_event_handle); + +/* + * Extension interface - used to register the IR decoders + */ + +int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler) +{ + mutex_lock(&ir_raw_handler_lock); + list_add_tail(&ir_raw_handler->list, &ir_raw_handler_list); + mutex_unlock(&ir_raw_handler_lock); + return 0; +} +EXPORT_SYMBOL(ir_raw_handler_register); + +void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler) +{ + mutex_lock(&ir_raw_handler_lock); + list_del(&ir_raw_handler->list); + mutex_unlock(&ir_raw_handler_lock); +} +EXPORT_SYMBOL(ir_raw_handler_unregister); + +static void init_decoders(struct work_struct *work) +{ + /* Load the decoder modules */ + + load_nec_decode(); + + /* If needed, we may later add some init code. In this case, + it is needed to change the CONFIG_MODULE test at ir-core.h + */ +} + +void ir_raw_init(void) +{ + INIT_WORK(&wq_load, init_decoders); + schedule_work(&wq_load); +}
\ No newline at end of file diff --git a/drivers/media/IR/ir-sysfs.c b/drivers/media/IR/ir-sysfs.c index 253e66999f18..2279d5594b05 100644 --- a/drivers/media/IR/ir-sysfs.c +++ b/drivers/media/IR/ir-sysfs.c @@ -1,6 +1,6 @@ /* ir-register.c - handle IR scancode->keycode tables * - * Copyright (C) 2009 by Mauro Carvalho Chehab <mchehab@redhat.com> + * Copyright (C) 2009-2010 by Mauro Carvalho Chehab <mchehab@redhat.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -28,7 +28,7 @@ static char *ir_devnode(struct device *dev, mode_t *mode) return kasprintf(GFP_KERNEL, "irrcv/%s", dev_name(dev)); } -struct class ir_input_class = { +static struct class ir_input_class = { .name = "irrcv", .devnode = ir_devnode, }; @@ -251,6 +251,9 @@ static int __init ir_core_init(void) return rc; } + /* Initialize/load the decoders that will be used */ + ir_raw_init(); + return 0; } |