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Diffstat (limited to 'drivers/media/IR/ir-raw-event.c')
-rw-r--r--drivers/media/IR/ir-raw-event.c251
1 files changed, 0 insertions, 251 deletions
diff --git a/drivers/media/IR/ir-raw-event.c b/drivers/media/IR/ir-raw-event.c
deleted file mode 100644
index ea68a3f2eff..00000000000
--- a/drivers/media/IR/ir-raw-event.c
+++ /dev/null
@@ -1,251 +0,0 @@
-/* ir-raw-event.c - handle IR Pulse/Space event
- *
- * Copyright (C) 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
- * the Free Software Foundation version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include <linux/workqueue.h>
-#include <linux/spinlock.h>
-#include <linux/sched.h>
-#include "ir-core-priv.h"
-
-/* Define the max number of pulse/space transitions to buffer */
-#define MAX_IR_EVENT_SIZE 512
-
-/* Used to handle IR raw handler extensions */
-static LIST_HEAD(ir_raw_handler_list);
-static DEFINE_SPINLOCK(ir_raw_handler_lock);
-
-/**
- * RUN_DECODER() - runs an operation on all IR decoders
- * @ops: IR raw handler operation to be called
- * @arg: arguments to be passed to the callback
- *
- * Calls ir_raw_handler::ops for all registered IR handlers. It prevents
- * new decode addition/removal while running, by locking ir_raw_handler_lock
- * mutex. If an error occurs, it stops the ops. Otherwise, it returns a sum
- * of the return codes.
- */
-#define RUN_DECODER(ops, ...) ({ \
- struct ir_raw_handler *_ir_raw_handler; \
- int _sumrc = 0, _rc; \
- spin_lock(&ir_raw_handler_lock); \
- list_for_each_entry(_ir_raw_handler, &ir_raw_handler_list, list) { \
- if (_ir_raw_handler->ops) { \
- _rc = _ir_raw_handler->ops(__VA_ARGS__); \
- if (_rc < 0) \
- break; \
- _sumrc += _rc; \
- } \
- } \
- spin_unlock(&ir_raw_handler_lock); \
- _sumrc; \
-})
-
-#ifdef MODULE
-/* Used to load the decoders */
-static struct work_struct wq_load;
-#endif
-
-static void ir_raw_event_work(struct work_struct *work)
-{
- struct ir_raw_event ev;
- struct ir_raw_event_ctrl *raw =
- container_of(work, struct ir_raw_event_ctrl, rx_work);
-
- while (kfifo_out(&raw->kfifo, &ev, sizeof(ev)) == sizeof(ev))
- RUN_DECODER(decode, raw->input_dev, ev);
-}
-
-int ir_raw_event_register(struct input_dev *input_dev)
-{
- struct ir_input_dev *ir = input_get_drvdata(input_dev);
- int rc;
-
- ir->raw = kzalloc(sizeof(*ir->raw), GFP_KERNEL);
- if (!ir->raw)
- return -ENOMEM;
-
- ir->raw->input_dev = input_dev;
- INIT_WORK(&ir->raw->rx_work, ir_raw_event_work);
-
- rc = kfifo_alloc(&ir->raw->kfifo, sizeof(s64) * MAX_IR_EVENT_SIZE,
- GFP_KERNEL);
- if (rc < 0) {
- kfree(ir->raw);
- ir->raw = NULL;
- return rc;
- }
-
- rc = RUN_DECODER(raw_register, input_dev);
- if (rc < 0) {
- kfifo_free(&ir->raw->kfifo);
- kfree(ir->raw);
- ir->raw = NULL;
- return rc;
- }
-
- return rc;
-}
-
-void ir_raw_event_unregister(struct input_dev *input_dev)
-{
- struct ir_input_dev *ir = input_get_drvdata(input_dev);
-
- if (!ir->raw)
- return;
-
- cancel_work_sync(&ir->raw->rx_work);
- RUN_DECODER(raw_unregister, input_dev);
-
- kfifo_free(&ir->raw->kfifo);
- kfree(ir->raw);
- ir->raw = NULL;
-}
-
-/**
- * ir_raw_event_store() - pass a pulse/space duration to the raw ir decoders
- * @input_dev: the struct input_dev device descriptor
- * @ev: the struct ir_raw_event descriptor of the pulse/space
- *
- * This routine (which may be called from an interrupt context) stores a
- * pulse/space duration for the raw ir decoding state machines. Pulses are
- * signalled as positive values and spaces as negative values. A zero value
- * will reset the decoding state machines.
- */
-int ir_raw_event_store(struct input_dev *input_dev, struct ir_raw_event *ev)
-{
- struct ir_input_dev *ir = input_get_drvdata(input_dev);
-
- if (!ir->raw)
- return -EINVAL;
-
- if (kfifo_in(&ir->raw->kfifo, ev, sizeof(*ev)) != sizeof(*ev))
- return -ENOMEM;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(ir_raw_event_store);
-
-/**
- * ir_raw_event_store_edge() - notify raw ir decoders of the start of a pulse/space
- * @input_dev: the struct input_dev device descriptor
- * @type: the type of the event that has occurred
- *
- * This routine (which may be called from an interrupt context) is used to
- * store the beginning of an ir pulse or space (or the start/end of ir
- * reception) for the raw ir decoding state machines. This is used by
- * hardware which does not provide durations directly but only interrupts
- * (or similar events) on state change.
- */
-int ir_raw_event_store_edge(struct input_dev *input_dev, enum raw_event_type type)
-{
- struct ir_input_dev *ir = input_get_drvdata(input_dev);
- ktime_t now;
- s64 delta; /* ns */
- struct ir_raw_event ev;
- int rc = 0;
-
- if (!ir->raw)
- return -EINVAL;
-
- now = ktime_get();
- delta = ktime_to_ns(ktime_sub(now, ir->raw->last_event));
-
- /* Check for a long duration since last event or if we're
- * being called for the first time, note that delta can't
- * possibly be negative.
- */
- ev.duration = 0;
- if (delta > IR_MAX_DURATION || !ir->raw->last_type)
- type |= IR_START_EVENT;
- else
- ev.duration = delta;
-
- if (type & IR_START_EVENT)
- ir_raw_event_reset(input_dev);
- else if (ir->raw->last_type & IR_SPACE) {
- ev.pulse = false;
- rc = ir_raw_event_store(input_dev, &ev);
- } else if (ir->raw->last_type & IR_PULSE) {
- ev.pulse = true;
- rc = ir_raw_event_store(input_dev, &ev);
- } else
- return 0;
-
- ir->raw->last_event = now;
- ir->raw->last_type = type;
- return rc;
-}
-EXPORT_SYMBOL_GPL(ir_raw_event_store_edge);
-
-/**
- * ir_raw_event_handle() - schedules the decoding of stored ir data
- * @input_dev: the struct input_dev device descriptor
- *
- * This routine will signal the workqueue to start decoding stored ir data.
- */
-void ir_raw_event_handle(struct input_dev *input_dev)
-{
- struct ir_input_dev *ir = input_get_drvdata(input_dev);
-
- if (!ir->raw)
- return;
-
- schedule_work(&ir->raw->rx_work);
-}
-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)
-{
- spin_lock(&ir_raw_handler_lock);
- list_add_tail(&ir_raw_handler->list, &ir_raw_handler_list);
- spin_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)
-{
- spin_lock(&ir_raw_handler_lock);
- list_del(&ir_raw_handler->list);
- spin_unlock(&ir_raw_handler_lock);
-}
-EXPORT_SYMBOL(ir_raw_handler_unregister);
-
-#ifdef MODULE
-static void init_decoders(struct work_struct *work)
-{
- /* Load the decoder modules */
-
- load_nec_decode();
- load_rc5_decode();
- load_rc6_decode();
- load_jvc_decode();
- load_sony_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
- */
-}
-#endif
-
-void ir_raw_init(void)
-{
-#ifdef MODULE
- INIT_WORK(&wq_load, init_decoders);
- schedule_work(&wq_load);
-#endif
-}
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