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nuttx/configs/same70-xplained/src/sam_mrf24j40.c

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/****************************************************************************
* configs/same70-xplained/src/sam_mrf24j40.c
*
* Copyright (C) 2017 Gregory Nutt, All rights reserver
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 <stdio.h>
#include <stdint.h>
#include <errno.h>
#include <assert.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/fs/fs.h>
#include <nuttx/wireless/ieee802154/ieee802154_mac.h>
#include <nuttx/wireless/ieee802154/mrf24j40.h>
#include "sam_gpio.h"
#include "sam_spi.h"
#include "same70-xplained.h"
#ifdef HAVE_MRF24J40
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#undef BEE_RESET
/****************************************************************************
* Private Types
****************************************************************************/
struct sam_priv_s
{
struct mrf24j40_lower_s dev;
uint32_t intcfg;
#ifdef BEE_RESET
uint32_t rstcfg;
#endif
uint8_t irq;
uint8_t csno;
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* IRQ/GPIO access callbacks. These operations all hidden behind callbacks
* to isolate the MRF24J40 driver from differences in GPIO interrupt handling
* varying boards and MCUs.
*
* irq_attach - Attach the MRF24J40 interrupt handler to the GPIO
interrupt
* irq_enable - Enable or disable the GPIO interrupt
*/
static int sam_attach_irq(FAR const struct mrf24j40_lower_s *lower,
xcpt_t handler, FAR void *arg);
static void sam_enable_irq(FAR const struct mrf24j40_lower_s *lower,
bool state);
static int sam_mrf24j40_devsetup(FAR struct sam_priv_s *priv);
/****************************************************************************
* Private Data
****************************************************************************/
/* A reference to a structure of this type must be passed to the MRF24J40
* driver. This structure provides information about the configuration
* of the MRF24J40 and provides some board-specific hooks.
*
* Memory for this structure is provided by the caller. It is not copied
* by the driver and is presumed to persist while the driver is active. The
* memory must be writable because, under certain circumstances, the driver
* may modify frequency or X plate resistance values.
*/
#ifdef CONFIG_SAME70XPLAINED_MB1_BEE
static struct sam_priv_s g_mrf24j40_mb1_priv =
{
.dev.attach = sam_attach_irq,
.dev.enable = sam_enable_irq,
.intcfg = CLICK_MB1_INTR,
#ifdef BEE_RESET
.rstcfg = CLICK_MB1_RESET,
#endif
.irq = IRQ_MB1,
.csno = MB1_CSNO,
};
#endif
#ifdef CONFIG_SAME70XPLAINED_MB2_BEE
static struct sam_priv_s g_mrf24j40_mb2_priv =
{
.dev.attach = sam_attach_irq,
.dev.enable = sam_enable_irq,
.intcfg = CLICK_MB2_INTR,
#ifdef BEE_RESET
.rstcfg = CLICK_MB2_RESET,
#endif
.irq = IRQ_MB2,
.csno = MB2_CSNO,
};
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/* IRQ/GPIO access callbacks. These operations all hidden behind
* callbacks to isolate the MRF24J40 driver from differences in GPIO
* interrupt handling by varying boards and MCUs. If possible,
* interrupts should be configured on both rising and falling edges
* so that contact and loss-of-contact events can be detected.
*
* irq_attach - Attach the MRF24J40 interrupt handler to the GPIO
* interrupt
* irq_enable - Enable or disable the GPIO interrupt
*/
static int sam_attach_irq(FAR const struct mrf24j40_lower_s *lower,
xcpt_t handler, FAR void *arg)
{
FAR struct sam_priv_s *priv = (FAR struct sam_priv_s *)lower;
int ret;
DEBUGASSERT(priv != NULL);
ret = irq_attach(priv->irq, handler, arg);
if (ret < 0)
{
wlerr("ERROR: Failed to attach WM8904 interrupt: %d\n", ret);
}
return ret;
}
static void sam_enable_irq(FAR const struct mrf24j40_lower_s *lower,
bool state)
{
FAR struct sam_priv_s *priv = (FAR struct sam_priv_s *)lower;
static bool enabled;
irqstate_t flags;
/* The caller should not attempt to enable interrupts if the handler
* has not yet been 'attached'
*/
DEBUGASSERT(priv != NULL);
wlinfo("state: %d irq: %u\n", (int)state, priv->irq);
/* Has the interrupt state changed */
flags = enter_critical_section();
if (state != enabled)
{
/* Enable or disable interrupts */
if (state)
{
wlinfo("Enabling\n");
sam_gpioirqenable(priv->irq);
enabled = true;
}
else
{
wlinfo("Disabling\n");
sam_gpioirqdisable(priv->irq);
enabled = false;
}
}
leave_critical_section(flags);
}
/****************************************************************************
* Name: sam_mrf24j40_devsetup
*
* Description:
* Initialize one the MRF24J40 device in one mikroBUS slot
*
* Returned Value:
* Zero is returned on success. Otherwise, a negated errno value is
* returned to indicate the nature of the failure.
*
****************************************************************************/
static int sam_mrf24j40_devsetup(FAR struct sam_priv_s *priv)
{
FAR struct ieee802154_radio_s *radio;
MACHANDLE mac;
FAR struct spi_dev_s *spi;
int ret;
#ifdef BEE_RESET
/* Bring the MRF24J40 out of reset
* NOTE: Not necessary. The RST# input is pulled high on the BEE.
*/
(void)sam_configgpio(priv->rstcfg);
sam_gpiowrite(priv->rstcfg, true);
#endif
/* Configure the interrupt pin */
(void)sam_configgpio(priv->intcfg);
sam_gpioirq(priv->intcfg);
/* Initialize the SPI bus and get an instance of the SPI interface */
spi = sam_spibus_initialize(priv->csno);
if (spi == NULL)
{
wlerr("ERROR: Failed to initialize SPI bus %d\n", priv->csno);
return -ENODEV;
}
/* Initialize and register the SPI MRF24J40 device */
radio = mrf24j40_init(spi, &priv->dev);
if (radio == NULL)
{
wlerr("ERROR: Failed to initialize MRF24J40 radio\n");
return -ENODEV;
}
/* Create a 802.15.4 MAC device from a 802.15.4 compatible radio device. */
mac = mac802154_create(radio);
if (mac == NULL)
{
wlerr("ERROR: Failed to initialize IEEE802.15.4 MAC\n");
return -ENODEV;
}
#ifdef CONFIG_IEEE802154_NETDEV
/* Use the IEEE802.15.4 MAC interface instance to create a 6LoWPAN
* network interface by wrapping the MAC interface instance in a
* network device driver via mac802154dev_register().
*/
ret = mac802154netdev_register(mac);
if (ret < 0)
{
wlerr("ERROR: Failed to register the MAC network driver wpan%d: %d\n",
0, ret);
return ret;
}
#endif
#ifdef CONFIG_IEEE802154_MACDEV
/* If want to call these APIs from userspace, you have to wrap the MAC
* interface in a character device via mac802154dev_register().
*/
ret = mac802154dev_register(mac, 0);
if (ret < 0)
{
wlerr("ERROR: Failed to register the MAC character driver /dev/ieee%d: %d\n",
0, ret);
return ret;
}
#endif
return OK;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: sam_mrf24j40_initialize
*
* Description:
* Initialize the MRF24J40 device.
*
* Returned Value:
* Zero is returned on success. Otherwise, a negated errno value is
* returned to indicate the nature of the failure.
*
****************************************************************************/
int sam_mrf24j40_initialize(void)
{
int ret;
#ifdef CONFIG_SAME70XPLAINED_MB1_BEE
wlinfo("Configuring BEE in mikroBUS1\n");
ret = sam_mrf24j40_devsetup(&g_mrf24j40_mb1_priv);
if (ret < 0)
{
wlerr("ERROR: Failed to initialize BD in mikroBUS1: %d\n", ret);
}
#endif
#ifdef CONFIG_SAME70XPLAINED_MB2_BEE
wlinfo("Configuring BEE in mikroBUS2\n");
ret = sam_mrf24j40_devsetup(&g_mrf24j40_mb2_priv);
if (ret < 0)
{
wlerr("ERROR: Failed to initialize BD in mikroBUS2: %d\n", ret);
}
#endif
UNUSED(ret);
return OK;
}
#endif /* HAVE_MRF24J40 */
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