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nuttx/wireless/ieee802154/radio802154_device.c

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/****************************************************************************
* wireless/ieee802154/radio802154_device.c
*
* Copyright (C) 2014-2015 Gregory Nutt. All rights reserved.
* Copyright (C) 2014-2015 Sebastien Lorquet. All rights reserved.
* Author: Sebastien Lorquet <sebastien@lorquet.fr>
* Author: Anthony Merlino <anthony@vergeaero.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <nuttx/arch.h>
#include <nuttx/kmalloc.h>
#include <nuttx/wireless/ieee802154/ieee802154_radio.h>
#include "radio802154_ioctl.h"
/****************************************************************************
* Private Types
****************************************************************************/
struct radio802154_devwrapper_s
{
FAR struct ieee802154_radio_s *child;
sem_t devsem; /* Device access serialization semaphore */
bool opened; /* This device can only be opened once */
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static void radio802154dev_semtake(FAR struct radio802154_devwrapper_s *dev);
static int radio802154dev_open(FAR struct file *filep);
static int radio802154dev_close(FAR struct file *filep);
static ssize_t radio802154dev_read(FAR struct file *filep, FAR char *buffer,
size_t len);
static ssize_t radio802154dev_write(FAR struct file *filep,
FAR const char *buffer, size_t len);
static int radio802154dev_ioctl(FAR struct file *filep, int cmd,
unsigned long arg);
/****************************************************************************
* Private Data
****************************************************************************/
static const struct file_operations radio802154dev_fops =
{
radio802154dev_open , /* open */
radio802154dev_close, /* close */
radio802154dev_read , /* read */
radio802154dev_write, /* write */
NULL, /* seek */
radio802154dev_ioctl /* ioctl */
#ifndef CONFIG_DISABLE_POLL
, NULL /* poll */
#endif
#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
, NULL /* unlink */
#endif
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: radio802154dev_semtake
*
* Description:
* Acquire the semaphore used for access serialization.
*
****************************************************************************/
static void radio802154dev_semtake(FAR struct radio802154_devwrapper_s *dev)
{
/* Take the semaphore (perhaps waiting) */
while (sem_wait(&dev->devsem) != 0)
{
/* The only case that an error should occur here is if
* the wait was awakened by a signal.
*/
DEBUGASSERT(errno == EINTR);
}
}
/****************************************************************************
* Name: radio802154dev_semgive
*
* Description:
* Release the semaphore used for access serialization.
*
****************************************************************************/
static inline void radio802154dev_semgive(FAR struct radio802154_devwrapper_s *dev)
{
sem_post(&dev->devsem);
}
/****************************************************************************
* Name: radio802154dev_open
*
* Description:
* Open the 802.15.4 radio character device.
*
****************************************************************************/
static int radio802154dev_open(FAR struct file *filep)
{
FAR struct inode *inode;
FAR struct radio802154_devwrapper_s *dev;
DEBUGASSERT(filep != NULL && filep->f_inode != NULL);
inode = filep->f_inode;
dev = inode->i_private;
DEBUGASSERT(dev != NULL);
/* Get exclusive access to the driver data structures */
radio802154dev_semtake(dev);
if (dev->opened)
{
/* Already opened */
return -EMFILE;
}
else
{
/* Enable interrupts (only rx for now)*/
//mrf24j40_setreg(dev->spi, MRF24J40_INTCON, ~(MRF24J40_INTCON_RXIE) );
//dev->lower->enable(dev->lower, TRUE);
dev->opened = true;
}
radio802154dev_semgive(dev);
return OK;
}
/****************************************************************************
* Name: radio802154dev_close
*
* Description:
* Close the 802.15.4 radio character device.
*
****************************************************************************/
static int radio802154dev_close(FAR struct file *filep)
{
FAR struct inode *inode;
FAR struct radio802154_devwrapper_s *dev;
int ret = OK;
DEBUGASSERT(filep != NULL && filep->f_inode != NULL);
inode = filep->f_inode;
dev = inode->i_private;
DEBUGASSERT(dev != NULL);
/* Get exclusive access to the driver data structures */
radio802154dev_semtake(dev);
if (!dev->opened)
{
/* Driver has not been opened */
ret = -EIO;
}
else
{
/* Disable interrupts */
//mrf24j40_setreg(dev->spi, MRF24J40_INTCON, 0xFF );
//dev->lower->enable(dev->lower, FALSE);
dev->opened = false;
}
radio802154dev_semgive(dev);
return ret;
}
/****************************************************************************
* Name: radio802154dev_read
*
* Description:
* Return the last received packet.
* TODO: Return a packet from the receive queue. The buffer must be a pointer to a
* struct ieee802154_packet_s structure, with a correct length.
*
****************************************************************************/
static ssize_t radio802154dev_read(FAR struct file *filep, FAR char *buffer, size_t len)
{
FAR struct inode *inode;
FAR struct radio802154_devwrapper_s *dev;
FAR struct ieee802154_packet_s *buf;
int ret = OK;
DEBUGASSERT(filep != NULL && filep->f_inode != NULL);
inode = filep->f_inode;
dev = inode->i_private;
DEBUGASSERT(dev != NULL && buffer != NULL);
buf = (FAR struct ieee802154_packet_s*)buffer;
/* Get exclusive access to the driver data structures */
if (len < sizeof(struct ieee802154_packet_s))
{
ret = -EINVAL;
goto done;
}
#warning Receive needs to be redone!
#if 0
ret = dev->child->ops->rxenable(dev->child, 1, buf);
if (ret < 0)
{
goto done;
}
/* if no packet is received, this will produce -EAGAIN
* The user is responsible for sleeping until sth arrives
*/
#if 0
ret = sem_trywait(&dev->child->rxsem);
#else
ret = sem_wait(&dev->child->rxsem);
#endif
if (ret < 0)
{
ret = -errno;
goto done;
}
/* Disable read until we have process the current read */
dev->child->ops->rxenable(dev->child, 0, NULL);
ret = buf->len;
#endif
done:
return ret;
}
/****************************************************************************
* Name: radio802154dev_write
*
* Description:
* Send a packet immediately.
* TODO: Put a packet in the send queue. The packet will be sent as soon
* as possible. The buffer must point to a struct radio802154_packet_s
* with the correct length.
*
****************************************************************************/
static ssize_t radio802154dev_write(FAR struct file *filep,
FAR const char *buffer, size_t len)
{
FAR struct inode *inode;
FAR struct radio802154_devwrapper_s *dev;
FAR struct ieee802154_packet_s *packet;
FAR struct timespec timeout;
int ret = OK;
DEBUGASSERT(filep != NULL && filep->f_inode != NULL);
inode = filep->f_inode;
dev = inode->i_private;
DEBUGASSERT(dev != NULL);
/* Get exclusive access to the driver data structures */
/* TODO: Make this an option or have a new method of doing timeout from
* ioctrl.
*/
timeout.tv_sec = 1;
timeout.tv_nsec = 0;
/* Sanity checks */
if (len < sizeof(struct ieee802154_packet_s))
{
ret = -EINVAL;
//goto done;
/* TODO Double check I like having assert here. It is a bigger problem
* if buffers are to small.
*/
DEBUGASSERT(0);
}
packet = (FAR struct ieee802154_packet_s*) buffer;
if (packet->len > 125) /* Max len 125, 2 FCS bytes auto added by mrf */
{
ret = -EPERM;
//goto done;
DEBUGASSERT(0);
}
/* Copy packet to normal device TX fifo.
* Beacons and GTS transmission will be handled via IOCTLs
*/
#warning Fix this when transmit interface is complete
#if 0
ret = dev->child->ops->transmit(dev->child, packet);
if (ret != packet->len)
{
ret = -EPERM;
goto done;
}
if (sem_timedwait(&dev->child->txsem, &timeout))
{
wlerr("Radio Device timedout on Tx\n");
}
#endif
done:
/* Okay, tx interrupt received. check transmission status to decide success. */
return ret;
}
/****************************************************************************
* Name: radio802154dev_ioctl
*
* Description:
* Control the MRF24J40 device. This is where the real operations happen.
*
****************************************************************************/
static int radio802154dev_ioctl(FAR struct file *filep, int cmd,
unsigned long arg)
{
FAR struct inode *inode;
FAR struct radio802154_devwrapper_s *dev;
FAR struct ieee802154_radio_s *child;
int ret = OK;
DEBUGASSERT(filep != NULL && filep->f_inode != NULL);
inode = filep->f_inode;
dev = inode->i_private;
DEBUGASSERT(dev != NULL && dev->child != NULL);
child = dev->child;
/* Get exclusive access to the driver data structures */
switch (cmd)
{
case PHY802154IOC_SET_CHAN:
ret = radio802154_setchannel(child, (uint8_t)arg);
break;
case PHY802154IOC_GET_CHAN:
ret = radio802154_getchannel(child, (FAR uint8_t*)arg);
break;
case PHY802154IOC_SET_PANID:
ret = radio802154_setpanid(child, (uint16_t)arg);
break;
case PHY802154IOC_GET_PANID:
ret = radio802154_getpanid(child, (FAR uint16_t*)arg);
break;
case PHY802154IOC_SET_SADDR:
ret = radio802154_setsaddr(child, (uint16_t)arg);
break;
case PHY802154IOC_GET_SADDR:
ret = radio802154_getsaddr(child, (FAR uint16_t*)arg);
break;
case PHY802154IOC_SET_EADDR:
ret = radio802154_seteaddr(child, (FAR uint8_t*)arg);
break;
case PHY802154IOC_GET_EADDR:
ret = radio802154_geteaddr(child, (FAR uint8_t*)arg);
break;
case PHY802154IOC_SET_PROMISC:
ret = radio802154_setpromisc(child, (bool)arg);
break;
case PHY802154IOC_GET_PROMISC:
ret = radio802154_getpromisc(child, (FAR bool*)arg);
break;
case PHY802154IOC_SET_DEVMODE:
ret = radio802154_setdevmode(child, (uint8_t)arg);
break;
case PHY802154IOC_GET_DEVMODE:
ret = radio802154_getdevmode(child, (FAR uint8_t*)arg);
break;
case PHY802154IOC_SET_TXPWR:
ret = radio802154_settxpower(child, (int32_t)arg);
break;
case PHY802154IOC_GET_TXPWR:
ret = radio802154_gettxpower(child, (FAR int32_t*)arg);
break;
case PHY802154IOC_SET_CCA:
ret = radio802154_setcca(child, (FAR struct ieee802154_cca_s*)arg);
break;
case PHY802154IOC_GET_CCA:
ret = radio802154_getcca(child, (FAR struct ieee802154_cca_s*)arg);
break;
case PHY802154IOC_ENERGYDETECT:
ret = radio802154_energydetect(child, (FAR uint8_t*)arg);
break;
default:
ret = child->ops->ioctl(child, cmd,arg);
break;
}
return ret;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: radio802154dev_register
*
* Description:
* Register a character driver to access the IEEE 802.15.4 radio from
* user-space
*
* Input Parameters:
* radio - Pointer to the radio struct to be registerd.
* devname - The name of the IEEE 802.15.4 radio to be registered.
*
* Returned Values:
* Zero (OK) is returned on success. Otherwise a negated errno value is
* returned to indicate the nature of the failure.
*
****************************************************************************/
int radio802154dev_register(FAR struct ieee802154_radio_s *radio,
FAR char *devname)
{
FAR struct radio802154_devwrapper_s *dev;
dev = kmm_zalloc(sizeof(struct radio802154_devwrapper_s));
if (dev == NULL)
{
return -ENOMEM;
}
dev->child = radio;
sem_init(&dev->devsem, 0, 1); /* Allow the device to be opened once before blocking */
return register_driver(devname, &radio802154dev_fops, 0666, dev);
}
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