1 files changed, 0 insertions, 419 deletions

diff --git a/drivers/media/IR/ir-rc6-decoder.c b/drivers/media/IR/ir-rc6-decoder.c
deleted file mode 100644
index 2bf479f4f1b..00000000000
--- a/drivers/media/IR/ir-rc6-decoder.c
+++ /dev/null
@@ -1,419 +0,0 @@
-/* ir-rc6-decoder.c - A decoder for the RC6 IR protocol
- *
- * Copyright (C) 2010 by David Härdeman <david@hardeman.nu>
- *
- * 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 "ir-core-priv.h"
-
-/*
- * This decoder currently supports:
- * RC6-0-16	(standard toggle bit in header)
- * RC6-6A-24	(no toggle bit)
- * RC6-6A-32	(MCE version with toggle bit in body)
- */
-
-#define RC6_UNIT		444444	/* us */
-#define RC6_HEADER_NBITS	4	/* not including toggle bit */
-#define RC6_0_NBITS		16
-#define RC6_6A_SMALL_NBITS	24
-#define RC6_6A_LARGE_NBITS	32
-#define RC6_PREFIX_PULSE	(6 * RC6_UNIT)
-#define RC6_PREFIX_SPACE	(2 * RC6_UNIT)
-#define RC6_BIT_START		(1 * RC6_UNIT)
-#define RC6_BIT_END		(1 * RC6_UNIT)
-#define RC6_TOGGLE_START	(2 * RC6_UNIT)
-#define RC6_TOGGLE_END		(2 * RC6_UNIT)
-#define RC6_MODE_MASK		0x07	/* for the header bits */
-#define RC6_STARTBIT_MASK	0x08	/* for the header bits */
-#define RC6_6A_MCE_TOGGLE_MASK	0x8000	/* for the body bits */
-
-/* Used to register rc6_decoder clients */
-static LIST_HEAD(decoder_list);
-static DEFINE_SPINLOCK(decoder_lock);
-
-enum rc6_mode {
-	RC6_MODE_0,
-	RC6_MODE_6A,
-	RC6_MODE_UNKNOWN,
-};
-
-enum rc6_state {
-	STATE_INACTIVE,
-	STATE_PREFIX_SPACE,
-	STATE_HEADER_BIT_START,
-	STATE_HEADER_BIT_END,
-	STATE_TOGGLE_START,
-	STATE_TOGGLE_END,
-	STATE_BODY_BIT_START,
-	STATE_BODY_BIT_END,
-	STATE_FINISHED,
-};
-
-struct decoder_data {
-	struct list_head	list;
-	struct ir_input_dev	*ir_dev;
-	int			enabled:1;
-
-	/* State machine control */
-	enum rc6_state		state;
-	u8			header;
-	u32			body;
-	struct ir_raw_event	prev_ev;
-	bool			toggle;
-	unsigned		count;
-	unsigned		wanted_bits;
-};
-
-
-/**
- * get_decoder_data()	- gets decoder data
- * @input_dev:	input device
- *
- * Returns the struct decoder_data that corresponds to a device
- */
-static struct decoder_data *get_decoder_data(struct  ir_input_dev *ir_dev)
-{
-	struct decoder_data *data = NULL;
-
-	spin_lock(&decoder_lock);
-	list_for_each_entry(data, &decoder_list, list) {
-		if (data->ir_dev == ir_dev)
-			break;
-	}
-	spin_unlock(&decoder_lock);
-	return data;
-}
-
-static ssize_t store_enabled(struct device *d,
-			     struct device_attribute *mattr,
-			     const char *buf,
-			     size_t len)
-{
-	unsigned long value;
-	struct ir_input_dev *ir_dev = dev_get_drvdata(d);
-	struct decoder_data *data = get_decoder_data(ir_dev);
-
-	if (!data)
-		return -EINVAL;
-
-	if (strict_strtoul(buf, 10, &value) || value > 1)
-		return -EINVAL;
-
-	data->enabled = value;
-
-	return len;
-}
-
-static ssize_t show_enabled(struct device *d,
-			     struct device_attribute *mattr, char *buf)
-{
-	struct ir_input_dev *ir_dev = dev_get_drvdata(d);
-	struct decoder_data *data = get_decoder_data(ir_dev);
-
-	if (!data)
-		return -EINVAL;
-
-	if (data->enabled)
-		return sprintf(buf, "1\n");
-	else
-	return sprintf(buf, "0\n");
-}
-
-static DEVICE_ATTR(enabled, S_IRUGO | S_IWUSR, show_enabled, store_enabled);
-
-static struct attribute *decoder_attributes[] = {
-	&dev_attr_enabled.attr,
-	NULL
-};
-
-static struct attribute_group decoder_attribute_group = {
-	.name	= "rc6_decoder",
-	.attrs	= decoder_attributes,
-};
-
-static enum rc6_mode rc6_mode(struct decoder_data *data) {
-	switch (data->header & RC6_MODE_MASK) {
-	case 0:
-		return RC6_MODE_0;
-	case 6:
-		if (!data->toggle)
-			return RC6_MODE_6A;
-		/* fall through */
-	default:
-		return RC6_MODE_UNKNOWN;
-	}
-}
-
-/**
- * ir_rc6_decode() - Decode one RC6 pulse or space
- * @input_dev:	the struct input_dev descriptor of the device
- * @ev:		the struct ir_raw_event descriptor of the pulse/space
- *
- * This function returns -EINVAL if the pulse violates the state machine
- */
-static int ir_rc6_decode(struct input_dev *input_dev, struct ir_raw_event ev)
-{
-	struct decoder_data *data;
-	struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
-	u32 scancode;
-	u8 toggle;
-
-	data = get_decoder_data(ir_dev);
-	if (!data)
-		return -EINVAL;
-
-	if (!data->enabled)
-		return 0;
-
-	if (IS_RESET(ev)) {
-		data->state = STATE_INACTIVE;
-		return 0;
-	}
-
-	if (!geq_margin(ev.duration, RC6_UNIT, RC6_UNIT / 2))
-		goto out;
-
-again:
-	IR_dprintk(2, "RC6 decode started at state %i (%uus %s)\n",
-		   data->state, TO_US(ev.duration), TO_STR(ev.pulse));
-
-	if (!geq_margin(ev.duration, RC6_UNIT, RC6_UNIT / 2))
-		return 0;
-
-	switch (data->state) {
-
-	case STATE_INACTIVE:
-		if (!ev.pulse)
-			break;
-
-		/* Note: larger margin on first pulse since each RC6_UNIT
-		   is quite short and some hardware takes some time to
-		   adjust to the signal */
-		if (!eq_margin(ev.duration, RC6_PREFIX_PULSE, RC6_UNIT))
-			break;
-
-		data->state = STATE_PREFIX_SPACE;
-		data->count = 0;
-		return 0;
-
-	case STATE_PREFIX_SPACE:
-		if (ev.pulse)
-			break;
-
-		if (!eq_margin(ev.duration, RC6_PREFIX_SPACE, RC6_UNIT / 2))
-			break;
-
-		data->state = STATE_HEADER_BIT_START;
-		return 0;
-
-	case STATE_HEADER_BIT_START:
-		if (!eq_margin(ev.duration, RC6_BIT_START, RC6_UNIT / 2))
-			break;
-
-		data->header <<= 1;
-		if (ev.pulse)
-			data->header |= 1;
-		data->count++;
-		data->prev_ev = ev;
-		data->state = STATE_HEADER_BIT_END;
-		return 0;
-
-	case STATE_HEADER_BIT_END:
-		if (!is_transition(&ev, &data->prev_ev))
-			break;
-
-		if (data->count == RC6_HEADER_NBITS)
-			data->state = STATE_TOGGLE_START;
-		else
-			data->state = STATE_HEADER_BIT_START;
-
-		decrease_duration(&ev, RC6_BIT_END);
-		goto again;
-
-	case STATE_TOGGLE_START:
-		if (!eq_margin(ev.duration, RC6_TOGGLE_START, RC6_UNIT / 2))
-			break;
-
-		data->toggle = ev.pulse;
-		data->prev_ev = ev;
-		data->state = STATE_TOGGLE_END;
-		return 0;
-
-	case STATE_TOGGLE_END:
-		if (!is_transition(&ev, &data->prev_ev) ||
-		    !geq_margin(ev.duration, RC6_TOGGLE_END, RC6_UNIT / 2))
-			break;
-
-		if (!(data->header & RC6_STARTBIT_MASK)) {
-			IR_dprintk(1, "RC6 invalid start bit\n");
-			break;
-		}
-
-		data->state = STATE_BODY_BIT_START;
-		data->prev_ev = ev;
-		decrease_duration(&ev, RC6_TOGGLE_END);
-		data->count = 0;
-
-		switch (rc6_mode(data)) {
-		case RC6_MODE_0:
-			data->wanted_bits = RC6_0_NBITS;
-			break;
-		case RC6_MODE_6A:
-			/* This might look weird, but we basically
-			   check the value of the first body bit to
-			   determine the number of bits in mode 6A */
-			if ((!ev.pulse && !geq_margin(ev.duration, RC6_UNIT, RC6_UNIT / 2)) ||
-			    geq_margin(ev.duration, RC6_UNIT, RC6_UNIT / 2))
-				data->wanted_bits = RC6_6A_LARGE_NBITS;
-			else
-				data->wanted_bits = RC6_6A_SMALL_NBITS;
-			break;
-		default:
-			IR_dprintk(1, "RC6 unknown mode\n");
-			goto out;
-		}
-		goto again;
-
-	case STATE_BODY_BIT_START:
-		if (!eq_margin(ev.duration, RC6_BIT_START, RC6_UNIT / 2))
-			break;
-
-		data->body <<= 1;
-		if (ev.pulse)
-			data->body |= 1;
-		data->count++;
-		data->prev_ev = ev;
-
-		data->state = STATE_BODY_BIT_END;
-		return 0;
-
-	case STATE_BODY_BIT_END:
-		if (!is_transition(&ev, &data->prev_ev))
-			break;
-
-		if (data->count == data->wanted_bits)
-			data->state = STATE_FINISHED;
-		else
-			data->state = STATE_BODY_BIT_START;
-
-		decrease_duration(&ev, RC6_BIT_END);
-		goto again;
-
-	case STATE_FINISHED:
-		if (ev.pulse)
-			break;
-
-		switch (rc6_mode(data)) {
-		case RC6_MODE_0:
-			scancode = data->body & 0xffff;
-			toggle = data->toggle;
-			IR_dprintk(1, "RC6(0) scancode 0x%04x (toggle: %u)\n",
-				   scancode, toggle);
-			break;
-		case RC6_MODE_6A:
-			if (data->wanted_bits == RC6_6A_LARGE_NBITS) {
-				toggle = data->body & RC6_6A_MCE_TOGGLE_MASK ? 1 : 0;
-				scancode = data->body & ~RC6_6A_MCE_TOGGLE_MASK;
-			} else {
-				toggle = 0;
-				scancode = data->body & 0xffffff;
-			}
-
-			IR_dprintk(1, "RC6(6A) scancode 0x%08x (toggle: %u)\n",
-				   scancode, toggle);
-			break;
-		default:
-			IR_dprintk(1, "RC6 unknown mode\n");
-			goto out;
-		}
-
-		ir_keydown(input_dev, scancode, toggle);
-		data->state = STATE_INACTIVE;
-		return 0;
-	}
-
-out:
-	IR_dprintk(1, "RC6 decode failed at state %i (%uus %s)\n",
-		   data->state, TO_US(ev.duration), TO_STR(ev.pulse));
-	data->state = STATE_INACTIVE;
-	return -EINVAL;
-}
-
-static int ir_rc6_register(struct input_dev *input_dev)
-{
-	struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
-	struct decoder_data *data;
-	int rc;
-
-	rc = sysfs_create_group(&ir_dev->dev.kobj, &decoder_attribute_group);
-	if (rc < 0)
-		return rc;
-
-	data = kzalloc(sizeof(*data), GFP_KERNEL);
-	if (!data) {
-		sysfs_remove_group(&ir_dev->dev.kobj, &decoder_attribute_group);
-		return -ENOMEM;
-	}
-
-	data->ir_dev = ir_dev;
-	data->enabled = 1;
-
-	spin_lock(&decoder_lock);
-	list_add_tail(&data->list, &decoder_list);
-	spin_unlock(&decoder_lock);
-
-	return 0;
-}
-
-static int ir_rc6_unregister(struct input_dev *input_dev)
-{
-	struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
-	static struct decoder_data *data;
-
-	data = get_decoder_data(ir_dev);
-	if (!data)
-		return 0;
-
-	sysfs_remove_group(&ir_dev->dev.kobj, &decoder_attribute_group);
-
-	spin_lock(&decoder_lock);
-	list_del(&data->list);
-	spin_unlock(&decoder_lock);
-
-	return 0;
-}
-
-static struct ir_raw_handler rc6_handler = {
-	.decode		= ir_rc6_decode,
-	.raw_register	= ir_rc6_register,
-	.raw_unregister	= ir_rc6_unregister,
-};
-
-static int __init ir_rc6_decode_init(void)
-{
-	ir_raw_handler_register(&rc6_handler);
-
-	printk(KERN_INFO "IR RC6 protocol handler initialized\n");
-	return 0;
-}
-
-static void __exit ir_rc6_decode_exit(void)
-{
-	ir_raw_handler_unregister(&rc6_handler);
-}
-
-module_init(ir_rc6_decode_init);
-module_exit(ir_rc6_decode_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("David Härdeman <david@hardeman.nu>");
-MODULE_DESCRIPTION("RC6 IR protocol decoder");