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driver/keyboard: add keyboard upperhalf driver

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Signed-off-by: yinshengkai <yinshengkai@xiaomi.com>
This commit is contained in:
yinshengkai 2022-02-18 22:36:06 +08:00 committed by Petro Karashchenko
parent 20c6d50eae
commit a0fa07c275
4 changed files with 560 additions and 0 deletions
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15
drivers/input/Kconfig
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@ -35,6 +35,21 @@ config INPUT_TOUCHSCREEN
select MM_CIRCBUF select MM_CIRCBUF
default n default n
config INPUT_KEYBOARD
bool
select MM_CIRCBUF
default n
if INPUT_KEYBOARD
config INPUT_KEYBOARD_BUFFSIZE
int "Number keyboard data buffer"
default 64
---help---
Maximum number of keyboard data buffer
endif # INPUT_KEYBOARD
config INPUT_UINPUT config INPUT_UINPUT
bool bool
default n default n

4
drivers/input/Make.defs
View File

@ -80,6 +80,10 @@ endif
endif endif
ifeq ($(CONFIG_INPUT_KEYBOARD),y)
CSRCS += keyboard_upper.c
endif
ifeq ($(CONFIG_INPUT_DJOYSTICK),y) ifeq ($(CONFIG_INPUT_DJOYSTICK),y)
CSRCS += djoystick.c CSRCS += djoystick.c
endif endif

444
drivers/input/keyboard_upper.c Normal file
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@ -0,0 +1,444 @@
/****************************************************************************
* drivers/input/keyboard_upper.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <assert.h>
#include <debug.h>
#include <fcntl.h>
#include <poll.h>
#include <nuttx/input/keyboard.h>
#include <nuttx/kmalloc.h>
#include <nuttx/list.h>
#include <nuttx/mm/circbuf.h>
#include <nuttx/semaphore.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
struct keyboard_opriv_s
{
sem_t waitsem;
sem_t locksem;
struct circbuf_s circ;
struct list_node node;
FAR struct pollfd *fds;
};
/* This structure is for keyboard upper half driver */
struct keyboard_upperhalf_s
{
sem_t exclsem; /* Manages exclusive access to this structure */
struct list_node head; /* Head of list */
FAR struct keyboard_lowerhalf_s
*lower; /* A pointer of lower half instance */
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static int keyboard_open(FAR struct file *filep);
static int keyboard_close(FAR struct file *filep);
static ssize_t keyboard_read(FAR struct file *filep, FAR char *buffer,
size_t len);
static ssize_t keyboard_write(FAR struct file *filep, FAR const char *buffer,
size_t len);
static int keyboard_poll(FAR struct file *filep, FAR struct pollfd *fds,
bool setup);
static void keyboard_notify(FAR struct keyboard_opriv_s *buffer);
/****************************************************************************
* Private Data
****************************************************************************/
static const struct file_operations g_keyboard_fops =
{
keyboard_open, /* open */
keyboard_close, /* close */
keyboard_read, /* read */
keyboard_write, /* write */
NULL, /* seek */
NULL, /* ioctl */
keyboard_poll /* poll */
#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
, NULL /* unlink */
#endif
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: keyboard_notify
****************************************************************************/
static void keyboard_notify(FAR struct keyboard_opriv_s *opriv)
{
FAR struct pollfd *fds = opriv->fds;
if (fds != NULL)
{
fds->revents |= (fds->events & POLLIN);
if (fds->revents != 0)
{
/* report event log */
int semcount;
nxsem_get_value(fds->sem, &semcount);
if (semcount < 1)
{
nxsem_post(fds->sem);
}
}
}
}
/****************************************************************************
* Name: keyboard_open
****************************************************************************/
static int keyboard_open(FAR struct file *filep)
{
FAR struct keyboard_opriv_s *opriv = NULL;
FAR struct inode *inode = filep->f_inode;
FAR struct keyboard_upperhalf_s *upper = inode->i_private;
int ret;
ret = nxsem_wait(&upper->exclsem);
if (ret < 0)
{
return ret;
}
opriv = kmm_zalloc(sizeof(FAR struct keyboard_opriv_s));
if (opriv == NULL)
{
nxsem_post(&upper->exclsem);
return -ENOMEM;
}
/* Initializes the buffer for each open file */
ret = circbuf_init(&opriv->circ, NULL, CONFIG_INPUT_KEYBOARD_BUFFSIZE);
if (ret < 0)
{
kmm_free(opriv);
nxsem_post(&upper->exclsem);
return ret;
}
/* Perform the operations required by the lower level */
if (upper->lower->open)
{
ret = upper->lower->open(upper->lower);
if (ret < 0)
{
kmm_free(opriv);
nxsem_post(&upper->exclsem);
return ret;
}
}
nxsem_init(&opriv->waitsem, 0, 0);
nxsem_init(&opriv->locksem, 0, 1);
nxsem_set_protocol(&opriv->waitsem, SEM_PRIO_NONE);
list_add_tail(&upper->head, &opriv->node);
filep->f_priv = opriv;
nxsem_post(&upper->exclsem);
return ret;
}
/****************************************************************************
* Name: keyboard_close
****************************************************************************/
static int keyboard_close(FAR struct file *filep)
{
FAR struct keyboard_opriv_s *opriv = filep->f_priv;
FAR struct inode *inode = filep->f_inode;
FAR struct keyboard_upperhalf_s *upper = inode->i_private;
int ret;
ret = nxsem_wait(&upper->exclsem);
if (ret < 0)
{
return ret;
}
/* Perform the operations required by the lower level */
if (upper->lower->close)
{
ret = upper->lower->close(upper->lower);
if (ret < 0)
{
goto out;
}
}
list_delete(&opriv->node);
circbuf_uninit(&opriv->circ);
nxsem_destroy(&opriv->waitsem);
nxsem_destroy(&opriv->locksem);
kmm_free(opriv);
out:
nxsem_post(&upper->exclsem);
return ret;
}
/****************************************************************************
* Name: keyboard_read
****************************************************************************/
static ssize_t keyboard_read(FAR struct file *filep,
FAR char *buff, size_t len)
{
FAR struct keyboard_opriv_s *opriv = filep->f_priv;
int ret;
/* Make sure that we have exclusive access to the private data structure */
ret = nxsem_wait(&opriv->locksem);
if (ret < 0)
{
return ret;
}
/* Is there keyboard data now? */
while (circbuf_is_empty(&opriv->circ))
{
if ((filep->f_oflags & O_NONBLOCK) != 0)
{
ret = -EAGAIN;
goto out;
}
else
{
nxsem_post(&opriv->locksem);
ret = nxsem_wait_uninterruptible(&opriv->waitsem);
if (ret < 0)
{
return ret;
}
ret = nxsem_wait(&opriv->locksem);
if (ret < 0)
{
return ret;
}
}
}
ret = circbuf_read(&opriv->circ, buff, len);
out:
nxsem_post(&opriv->locksem);
return ret;
}
/****************************************************************************
* Name: keyboard_poll
****************************************************************************/
static int keyboard_poll(FAR struct file *filep,
FAR struct pollfd *fds, bool setup)
{
FAR struct keyboard_opriv_s *opriv = filep->f_priv;
int ret;
ret = nxsem_wait(&opriv->locksem);
if (ret < 0)
{
return ret;
}
if (setup)
{
if (opriv->fds == NULL)
{
opriv->fds = fds;
fds->priv = &opriv->fds;
}
else
{
ret = -EBUSY;
goto errout;
}
if (!circbuf_is_empty(&opriv->circ))
{
keyboard_notify(opriv);
}
}
else
{
opriv->fds = NULL;
fds->priv = NULL;
}
errout:
nxsem_post(&opriv->locksem);
return ret;
}
/****************************************************************************
* Name: keyboard_write
****************************************************************************/
static ssize_t keyboard_write(FAR struct file *filep,
FAR const char *buffer, size_t buflen)
{
FAR struct inode *inode = filep->f_inode;
FAR struct keyboard_upperhalf_s *upper = inode->i_private;
FAR struct keyboard_lowerhalf_s *lower = upper->lower;
if (lower->write != NULL)
{
return lower->write(lower, buffer, buflen);
}
return -ENOSYS;
}
/****************************************************************************
* Public Function
****************************************************************************/
/****************************************************************************
* Name: keyboard_register
****************************************************************************/
int keyboard_register(FAR struct keyboard_lowerhalf_s *lower,
FAR const char *path)
{
FAR struct keyboard_upperhalf_s *upper;
int ret;
iinfo("Registering %s\n", path);
if (lower == NULL)
{
ierr("ERROR: invalid touchscreen device\n");
return -EINVAL;
}
upper = kmm_zalloc(sizeof(struct keyboard_upperhalf_s));
if (upper == NULL)
{
ierr("ERROR: Failed to mem alloc!\n");
return -ENOMEM;
}
upper->lower = lower;
lower->priv = upper;
list_initialize(&upper->head);
nxsem_init(&upper->exclsem, 0, 1);
ret = register_driver(path, &g_keyboard_fops, 0666, upper);
if (ret < 0)
{
nxsem_destroy(&upper->exclsem);
kmm_free(upper);
return ret;
}
return ret;
}
/****************************************************************************
* Name: keyboard_unregister
****************************************************************************/
int keyboard_unregister(FAR struct keyboard_lowerhalf_s *lower,
FAR const char *path)
{
FAR struct keyboard_upperhalf_s *upper;
int ret;
DEBUGASSERT(lower != NULL);
DEBUGASSERT(lower->priv != NULL);
upper = lower->priv;
iinfo("UnRegistering %s\n", path);
ret = unregister_driver(path);
if (ret < 0)
{
return ret;
}
nxsem_destroy(&upper->exclsem);
kmm_free(upper);
return 0;
}
/****************************************************************************
* keyboard_event
****************************************************************************/
void keyboard_event(FAR struct keyboard_lowerhalf_s *lower, uint32_t keycode,
uint32_t type)
{
FAR struct keyboard_upperhalf_s *upper = lower->priv;
FAR struct keyboard_opriv_s *opriv;
struct keyboard_event_s key;
int semcount;
if (nxsem_wait(&upper->exclsem) < 0)
{
return;
}
key.code = keycode;
key.type = type;
list_for_every_entry(&upper->head, opriv, struct keyboard_opriv_s, node)
{
if (nxsem_wait(&opriv->locksem) == 0)
{
circbuf_overwrite(&opriv->circ, &key,
sizeof(struct keyboard_event_s));
nxsem_get_value(&opriv->waitsem, &semcount);
if (semcount < 1)
{
nxsem_post(&opriv->waitsem);
}
keyboard_notify(opriv);
nxsem_post(&opriv->locksem);
}
}
nxsem_post(&upper->exclsem);
}

97
include/nuttx/input/keyboard.h Normal file
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@ -0,0 +1,97 @@
/****************************************************************************
* include/nuttx/input/keyboard.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __INCLUDE_NUTTX_INPUT_KEYBOARD_H
#define __INCLUDE_NUTTX_INPUT_KEYBOARD_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/input/x11_keysym.h>
#include <nuttx/input/x11_xf86keysym.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define KEYBOARD_PRESS 0 /* Key press event */
#define KEYBOARD_RELEASE 1 /* Key release event */
/****************************************************************************
* Public Types
****************************************************************************/
struct keyboard_event_s
{
uint32_t type;
uint32_t code;
};
struct keyboard_lowerhalf_s
{
FAR void *priv;
CODE int (*open)(FAR struct keyboard_lowerhalf_s *lower);
CODE int (*close)(FAR struct keyboard_lowerhalf_s *lower);
CODE ssize_t (*write)(FAR struct keyboard_lowerhalf_s *lower,
FAR const char *buffer, size_t buflen);
};
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/****************************************************************************
* Name: keyboard_event
****************************************************************************/
void keyboard_event(FAR struct keyboard_lowerhalf_s *lower, uint32_t keycode,
uint32_t type);
/****************************************************************************
* Name: keyboard_register
****************************************************************************/
int keyboard_register(FAR struct keyboard_lowerhalf_s *lower,
FAR const char *path);
/****************************************************************************
* Name: keyboard_register
****************************************************************************/
int keyboard_unregister(FAR struct keyboard_lowerhalf_s *lower,
FAR const char *path);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* __INCLUDE_NUTTX_INPUT_KEYBOARD_H */