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input: mt: Break out slots handling 

In preparation for common code to handle a larger set of MT slots
devices, move the slots handling over to a separate file.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
This commit is contained in:
Henrik Rydberg 2010-11-27 09:16:48 +01:00
parent c8ddb2713c
commit 47c78e8913
9 changed files with 108 additions and 65 deletions
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1
drivers/hid/hid-3m-pct.c
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@ -19,6 +19,7 @@
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/usb.h>
#include <linux/input/mt.h>
MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
MODULE_DESCRIPTION("3M PCT multitouch panels");

2
drivers/input/Makefile
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@ -5,7 +5,7 @@
# Each configuration option enables a list of files.
obj-$(CONFIG_INPUT) += input-core.o
input-core-objs := input.o input-compat.o ff-core.o
input-core-objs := input.o input-compat.o ff-core.o input-mt.o
obj-$(CONFIG_INPUT_FF_MEMLESS) += ff-memless.o
obj-$(CONFIG_INPUT_POLLDEV) += input-polldev.o

58
drivers/input/input-mt.c Normal file
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@ -0,0 +1,58 @@
/*
* Input Multitouch Library
*
* Copyright (c) 2008-2010 Henrik Rydberg
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*/
#include <linux/input/mt.h>
#include <linux/slab.h>
/**
* input_mt_create_slots() - create MT input slots
* @dev: input device supporting MT events and finger tracking
* @num_slots: number of slots used by the device
*
* This function allocates all necessary memory for MT slot handling in the
* input device, and adds ABS_MT_SLOT to the device capabilities. All slots
* are initially marked as unused by setting ABS_MT_TRACKING_ID to -1.
*/
int input_mt_create_slots(struct input_dev *dev, unsigned int num_slots)
{
int i;
if (!num_slots)
return 0;
dev->mt = kcalloc(num_slots, sizeof(struct input_mt_slot), GFP_KERNEL);
if (!dev->mt)
return -ENOMEM;
dev->mtsize = num_slots;
input_set_abs_params(dev, ABS_MT_SLOT, 0, num_slots - 1, 0, 0);
/* Mark slots as 'unused' */
for (i = 0; i < num_slots; i++)
input_mt_set_value(&dev->mt[i], ABS_MT_TRACKING_ID, -1);
return 0;
}
EXPORT_SYMBOL(input_mt_create_slots);
/**
* input_mt_destroy_slots() - frees the MT slots of the input device
* @dev: input device with allocated MT slots
*
* This function is only needed in error path as the input core will
* automatically free the MT slots when the device is destroyed.
*/
void input_mt_destroy_slots(struct input_dev *dev)
{
kfree(dev->mt);
dev->mt = NULL;
dev->mtsize = 0;
}
EXPORT_SYMBOL(input_mt_destroy_slots);

48
drivers/input/input.c
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@ -12,7 +12,7 @@
#include <linux/init.h>
#include <linux/types.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/random.h>
@ -1690,52 +1690,6 @@ void input_free_device(struct input_dev *dev)
}
EXPORT_SYMBOL(input_free_device);
/**
* input_mt_create_slots() - create MT input slots
* @dev: input device supporting MT events and finger tracking
* @num_slots: number of slots used by the device
*
* This function allocates all necessary memory for MT slot handling in the
* input device, and adds ABS_MT_SLOT to the device capabilities. All slots
* are initially marked as unused by setting ABS_MT_TRACKING_ID to -1.
*/
int input_mt_create_slots(struct input_dev *dev, unsigned int num_slots)
{
int i;
if (!num_slots)
return 0;
dev->mt = kcalloc(num_slots, sizeof(struct input_mt_slot), GFP_KERNEL);
if (!dev->mt)
return -ENOMEM;
dev->mtsize = num_slots;
input_set_abs_params(dev, ABS_MT_SLOT, 0, num_slots - 1, 0, 0);
/* Mark slots as 'unused' */
for (i = 0; i < num_slots; i++)
dev->mt[i].abs[ABS_MT_TRACKING_ID - ABS_MT_FIRST] = -1;
return 0;
}
EXPORT_SYMBOL(input_mt_create_slots);
/**
* input_mt_destroy_slots() - frees the MT slots of the input device
* @dev: input device with allocated MT slots
*
* This function is only needed in error path as the input core will
* automatically free the MT slots when the device is destroyed.
*/
void input_mt_destroy_slots(struct input_dev *dev)
{
kfree(dev->mt);
dev->mt = NULL;
dev->mtsize = 0;
}
EXPORT_SYMBOL(input_mt_destroy_slots);
/**
* input_set_capability - mark device as capable of a certain event
* @dev: device that is capable of emitting or accepting event

1
drivers/input/misc/uinput.c
View File

@ -37,6 +37,7 @@
#include <linux/fs.h>
#include <linux/miscdevice.h>
#include <linux/uinput.h>
#include <linux/input/mt.h>
#include "../input-compat.h"
static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)

1
drivers/input/tablet/wacom_wac.c
View File

@ -14,6 +14,7 @@
#include "wacom_wac.h"
#include "wacom.h"
#include <linux/input/mt.h>
static int wacom_penpartner_irq(struct wacom_wac *wacom)
{

2
drivers/input/touchscreen/wacom_w8001.c
View File

@ -15,7 +15,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/serio.h>
#include <linux/init.h>
#include <linux/ctype.h>

16
include/linux/input.h
View File

@ -1082,14 +1082,6 @@ struct ff_effect {
#include <linux/timer.h>
#include <linux/mod_devicetable.h>
/**
* struct input_mt_slot - represents the state of an input MT slot
* @abs: holds current values of ABS_MT axes for this slot
*/
struct input_mt_slot {
int abs[ABS_MT_LAST - ABS_MT_FIRST + 1];
};
/**
* struct input_dev - represents an input device
* @name: name of the device
@ -1461,11 +1453,6 @@ static inline void input_mt_sync(struct input_dev *dev)
input_event(dev, EV_SYN, SYN_MT_REPORT, 0);
}
static inline void input_mt_slot(struct input_dev *dev, int slot)
{
input_event(dev, EV_ABS, ABS_MT_SLOT, slot);
}
void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int code);
/**
@ -1578,8 +1565,5 @@ int input_ff_erase(struct input_dev *dev, int effect_id, struct file *file);
int input_ff_create_memless(struct input_dev *dev, void *data,
int (*play_effect)(struct input_dev *, void *, struct ff_effect *));
int input_mt_create_slots(struct input_dev *dev, unsigned int num_slots);
void input_mt_destroy_slots(struct input_dev *dev);
#endif
#endif

44
include/linux/input/mt.h Normal file
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@ -0,0 +1,44 @@
#ifndef _INPUT_MT_H
#define _INPUT_MT_H
/*
* Input Multitouch Library
*
* Copyright (c) 2010 Henrik Rydberg
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*/
#include <linux/input.h>
/**
* struct input_mt_slot - represents the state of an input MT slot
* @abs: holds current values of ABS_MT axes for this slot
*/
struct input_mt_slot {
int abs[ABS_MT_LAST - ABS_MT_FIRST + 1];
};
static inline void input_mt_set_value(struct input_mt_slot *slot,
unsigned code, int value)
{
slot->abs[code - ABS_MT_FIRST] = value;
}
static inline int input_mt_get_value(const struct input_mt_slot *slot,
unsigned code)
{
return slot->abs[code - ABS_MT_FIRST];
}
int input_mt_create_slots(struct input_dev *dev, unsigned int num_slots);
void input_mt_destroy_slots(struct input_dev *dev);
static inline void input_mt_slot(struct input_dev *dev, int slot)
{
input_event(dev, EV_ABS, ABS_MT_SLOT, slot);
}
#endif