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nuttx/drivers/wireless/ieee802154/mrf24j40.c

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/****************************************************************************
* drivers/wireless/ieee802154/mrf24j40.c
*
* Copyright (C) 2015-2016 Sebastien Lorquet. All rights reserved.
* Author: Sebastien Lorquet <sebastien@lorquet.fr>
*
* 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 <assert.h>
#include <debug.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <semaphore.h>
#include <nuttx/arch.h>
#include <nuttx/kmalloc.h>
#include <nuttx/wqueue.h>
#include <nuttx/fs/fs.h>
#include <nuttx/spi/spi.h>
#include <nuttx/wireless/ieee802154/mrf24j40.h>
#include <nuttx/wireless/ieee802154/ieee802154_radio.h>
#include "mrf24j40.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef CONFIG_SCHED_HPWORK
#error High priority work queue required in this driver
#endif
#ifndef CONFIG_IEEE802154_MRF24J40_SPIMODE
# define CONFIG_IEEE802154_MRF24J40_SPIMODE SPIDEV_MODE0
#endif
#ifndef CONFIG_IEEE802154_MRF24J40_FREQUENCY
# define CONFIG_IEEE802154_MRF24J40_FREQUENCY 8000000
#endif
#ifndef CONFIG_SPI_EXCHANGE
# error CONFIG_SPI_EXCHANGE required for this driver
#endif
/* Definitions for the device structure */
#define MRF24J40_RXMODE_NORMAL 0
#define MRF24J40_RXMODE_PROMISC 1
#define MRF24J40_RXMODE_NOCRC 2
/* Definitions for PA control on high power modules */
#define MRF24J40_PA_AUTO 1
#define MRF24J40_PA_ED 2
#define MRF24J40_PA_SLEEP 3
/****************************************************************************
* Private Types
****************************************************************************/
/* A MRF24J40 device instance */
struct mrf24j40_dev_s
{
struct ieee802154_dev_s ieee; /* The public device instance */
FAR struct spi_dev_s *spi; /* Saved SPI interface instance */
struct work_s irqwork; /* Interrupt continuation work queue support */
FAR const struct mrf24j40_lower_s *lower; /* Low-level MCU-specific support */
uint16_t panid; /* PAN identifier, FFFF = not set */
uint16_t saddr; /* short address, FFFF = not set */
uint8_t eaddr[8]; /* extended address, FFFFFFFFFFFFFFFF = not set */
uint8_t channel; /* 11 to 26 for the 2.4 GHz band */
uint8_t devmode; /* device mode: device, coord, pancoord */
uint8_t paenabled; /* enable usage of PA */
uint8_t rxmode; /* Reception mode: Main, no CRC, promiscuous */
int32_t txpower; /* TX power in mBm = dBm/100 */
struct ieee802154_cca_s cca; /* Clear channel assessement method */
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* Internal operations */
static void mrf24j40_lock (FAR struct spi_dev_s *spi);
static void mrf24j40_setreg (FAR struct spi_dev_s *spi, uint32_t addr, uint8_t val);
static uint8_t mrf24j40_getreg (FAR struct spi_dev_s *spi, uint32_t addr);
static int mrf24j40_resetrfsm (FAR struct mrf24j40_dev_s *dev);
static int mrf24j40_pacontrol (FAR struct mrf24j40_dev_s *dev, int mode);
static int mrf24j40_initialize(FAR struct mrf24j40_dev_s *dev);
static int mrf24j40_setrxmode (FAR struct mrf24j40_dev_s *dev, int mode);
static int mrf24j40_regdump (FAR struct mrf24j40_dev_s *dev);
static void mrf24j40_irqwork_rx(FAR struct mrf24j40_dev_s *dev);
static void mrf24j40_irqwork_tx(FAR struct mrf24j40_dev_s *dev);
static void mrf24j40_irqworker (FAR void *arg);
static int mrf24j40_interrupt (int irq, FAR void *context);
/* Driver operations */
static int mrf24j40_setchannel (FAR struct ieee802154_dev_s *ieee, uint8_t chan);
static int mrf24j40_getchannel (FAR struct ieee802154_dev_s *ieee, FAR uint8_t *chan);
static int mrf24j40_setpanid (FAR struct ieee802154_dev_s *ieee, uint16_t panid);
static int mrf24j40_getpanid (FAR struct ieee802154_dev_s *ieee, FAR uint16_t *panid);
static int mrf24j40_setsaddr (FAR struct ieee802154_dev_s *ieee, uint16_t saddr);
static int mrf24j40_getsaddr (FAR struct ieee802154_dev_s *ieee, FAR uint16_t *saddr);
static int mrf24j40_seteaddr (FAR struct ieee802154_dev_s *ieee, FAR uint8_t *eaddr);
static int mrf24j40_geteaddr (FAR struct ieee802154_dev_s *ieee, FAR uint8_t *eaddr);
static int mrf24j40_setpromisc (FAR struct ieee802154_dev_s *ieee, bool promisc);
static int mrf24j40_getpromisc (FAR struct ieee802154_dev_s *ieee, FAR bool *promisc);
static int mrf24j40_setdevmode (FAR struct ieee802154_dev_s *ieee, uint8_t mode);
static int mrf24j40_getdevmode (FAR struct ieee802154_dev_s *ieee, FAR uint8_t *mode);
static int mrf24j40_settxpower (FAR struct ieee802154_dev_s *ieee, int32_t txpwr);
static int mrf24j40_gettxpower (FAR struct ieee802154_dev_s *ieee, FAR int32_t *txpwr);
static int mrf24j40_setcca (FAR struct ieee802154_dev_s *ieee, FAR struct ieee802154_cca_s *cca);
static int mrf24j40_getcca (FAR struct ieee802154_dev_s *ieee, FAR struct ieee802154_cca_s *cca);
static int mrf24j40_ioctl (FAR struct ieee802154_dev_s *ieee, int cmd, unsigned long arg);
static int mrf24j40_energydetect(FAR struct ieee802154_dev_s *ieee, FAR uint8_t *energy);
static int mrf24j40_rxenable (FAR struct ieee802154_dev_s *ieee, bool state, FAR struct ieee802154_packet_s *packet);
static int mrf24j40_transmit (FAR struct ieee802154_dev_s *ieee, FAR struct ieee802154_packet_s *packet);
/* These are pointers to ALL registered MRF24J40 devices.
* This table is used during irqs to find the context
* Only one device is supported for now.
* More devices can be supported in the future by lookup them up
* using the IRQ number. See the ENC28J60 or CC3000 drivers for reference.
*/
static struct mrf24j40_dev_s g_mrf24j40_devices[1];
static const struct ieee802154_devops_s mrf24j40_devops =
{
mrf24j40_setchannel, mrf24j40_getchannel,
mrf24j40_setpanid , mrf24j40_getpanid,
mrf24j40_setsaddr , mrf24j40_getsaddr,
mrf24j40_seteaddr , mrf24j40_geteaddr,
mrf24j40_setpromisc, mrf24j40_getpromisc,
mrf24j40_setdevmode, mrf24j40_getdevmode,
mrf24j40_settxpower, mrf24j40_gettxpower,
mrf24j40_setcca , mrf24j40_getcca,
mrf24j40_ioctl,
mrf24j40_energydetect,
mrf24j40_rxenable,
mrf24j40_transmit
};
/****************************************************************************
* Private Functions
****************************************************************************/
/* Hardware access routines */
/****************************************************************************
* Name: mrf24j40_lock
*
* Description:
* Acquire exclusive access to the shared SPI bus.
*
****************************************************************************/
static void mrf24j40_lock(FAR struct spi_dev_s *spi)
{
SPI_LOCK (spi, 1);
SPI_SETBITS (spi, 8);
SPI_SETMODE (spi, CONFIG_IEEE802154_MRF24J40_SPIMODE);
SPI_SETFREQUENCY(spi, CONFIG_IEEE802154_MRF24J40_FREQUENCY);
}
/****************************************************************************
* Name: mrf24j40_unlock
*
* Description:
* Release exclusive access to the shared SPI bus.
*
****************************************************************************/
static inline void mrf24j40_unlock(FAR struct spi_dev_s *spi)
{
SPI_LOCK(spi,0);
}
/****************************************************************************
* Name: mrf24j40_setreg
*
* Description:
* Define the value of an MRF24J40 device register
*
****************************************************************************/
static void mrf24j40_setreg(FAR struct spi_dev_s *spi, uint32_t addr, uint8_t val)
{
uint8_t buf[3];
int len;
if (!(addr&0x80000000))
{
addr &= 0x3F; /* 6-bit address */
addr <<= 1;
addr |= 0x01; /* writing */
buf[0] = addr;
len = 1;
}
else
{
addr &= 0x3FF; /* 10-bit address */
addr <<= 5;
addr |= 0x8010; /* writing long */
buf[0] = (addr >> 8);
buf[1] = (addr & 0xFF);
len = 2;
}
buf[len++] = val;
mrf24j40_lock(spi);
SPI_SELECT(spi, SPIDEV_IEEE802154, true);
SPI_SNDBLOCK(spi, buf, len);
SPI_SELECT(spi, SPIDEV_IEEE802154, false);
mrf24j40_unlock(spi);
}
/****************************************************************************
* Name: mrf24j40_getreg
*
* Description:
* Return the value of an MRF24J40 device register
*
****************************************************************************/
static uint8_t mrf24j40_getreg(FAR struct spi_dev_s *spi, uint32_t addr)
{
uint8_t buf[3];
uint8_t rx[3];
int len;
if (!(addr&0x80000000))
{
/* 6-bit address */
addr &= 0x3F;
addr <<= 1;
buf[0] = addr;
len = 1;
}
else
{
/* 10-bit address */
addr &= 0x3FF;
addr <<= 5;
addr |= 0x8000;
buf[0] = (addr >> 8);
buf[1] = (addr & 0xFF);
len = 2;
}
buf[len++] = 0xFF; /* dummy */
mrf24j40_lock (spi);
SPI_SELECT (spi, SPIDEV_IEEE802154, true);
SPI_EXCHANGE (spi, buf, rx, len);
SPI_SELECT (spi, SPIDEV_IEEE802154, false);
mrf24j40_unlock(spi);
/*winfo("r[%04X]=%02X\n", addr, rx[len-1]);*/
return rx[len-1];
}
/****************************************************************************
* Name: mrf24j40_resetrfsm
*
* Description:
* Reset the RF state machine. Required at boot, after channel change,
* and probably after PA settings.
*
****************************************************************************/
static int mrf24j40_resetrfsm(FAR struct mrf24j40_dev_s *dev)
{
uint8_t reg;
reg = mrf24j40_getreg(dev->spi, MRF24J40_RFCTL);
reg |= 0x04;
mrf24j40_setreg(dev->spi, MRF24J40_RFCTL, reg);
reg &= ~0x04;
mrf24j40_setreg(dev->spi, MRF24J40_RFCTL, reg);
up_udelay(200);
return OK;
}
/****************************************************************************
* Name: mrf24j40_pacontrol
*
* Description:
* Control the external LNA/PA on the MRF24J40MB/MC/MD/ME modules
* GPIO 1: PA enable
* GPIO 2: LNA enable
* GPIO 3: PA power enable (not required on MB)
****************************************************************************/
static int mrf24j40_pacontrol(FAR struct mrf24j40_dev_s *dev, int mode)
{
if (!dev->paenabled)
{
return OK;
}
if (mode == MRF24J40_PA_AUTO)
{
mrf24j40_setreg(dev->spi, MRF24J40_TRISGPIO, 0x08);
mrf24j40_setreg(dev->spi, MRF24J40_GPIO , 0x08);
mrf24j40_setreg(dev->spi, MRF24J40_TESTMODE, 0x0F);
}
else if (mode == MRF24J40_PA_ED)
{
mrf24j40_setreg(dev->spi, MRF24J40_TESTMODE, 0x08);
mrf24j40_setreg(dev->spi, MRF24J40_TRISGPIO, 0x0F);
mrf24j40_setreg(dev->spi, MRF24J40_GPIO , 0x0C);
}
else if (mode == MRF24J40_PA_SLEEP)
{
mrf24j40_setreg(dev->spi, MRF24J40_TESTMODE, 0x08);
mrf24j40_setreg(dev->spi, MRF24J40_TRISGPIO, 0x0F);
mrf24j40_setreg(dev->spi, MRF24J40_GPIO , 0x00);
}
else
{
return -EINVAL;
}
mrf24j40_resetrfsm(dev);
return OK;
}
/****************************************************************************
* Name: mrf24j40_initialize
*
* Description:
* Reset the device and put in in order of operation
*
****************************************************************************/
static int mrf24j40_initialize(FAR struct mrf24j40_dev_s *dev)
{
/* Software reset */
mrf24j40_setreg(dev->spi, MRF24J40_SOFTRST , 0x07); /* 00000111 Reset */
while(mrf24j40_getreg(dev->spi, MRF24J40_SOFTRST) & 0x07);
/* Apply recommended settings */
mrf24j40_setreg(dev->spi, MRF24J40_PACON2 , 0x98); /* 10011000 Enable FIFO (default), TXONTS=6 (recommended), TXONT<8:7>=0 */
mrf24j40_setreg(dev->spi, MRF24J40_TXSTBL , 0x95); /* 10010101 set the SIFS period. RFSTBL=9, MSIFS=5, aMinSIFSPeriod=14 (min 12) */
mrf24j40_setreg(dev->spi, MRF24J40_TXPEND , 0x7C); /* 01111100 set the LIFS period, MLIFS=1Fh=31 aMinLIFSPeriod=40 (min 40) */
mrf24j40_setreg(dev->spi, MRF24J40_TXTIME , 0x30); /* 00110000 set the turnaround time, TURNTIME=3 aTurnAroundTime=12 */
mrf24j40_setreg(dev->spi, MRF24J40_RFCON1 , 0x02); /* 00000010 VCO optimization, recommended value */
mrf24j40_setreg(dev->spi, MRF24J40_RFCON2 , 0x80); /* 10000000 Enable PLL */
mrf24j40_setreg(dev->spi, MRF24J40_RFCON6 , 0x90); /* 10010000 TX filter enable, fast 20M recovery, No bat monitor*/
mrf24j40_setreg(dev->spi, MRF24J40_RFCON7 , 0x80); /* 10000000 Sleep clock on internal 100 kHz */
mrf24j40_setreg(dev->spi, MRF24J40_RFCON8 , 0x10); /* 00010000 VCO control bit, as recommended */
mrf24j40_setreg(dev->spi, MRF24J40_SLPCON1, 0x01); /* 00000001 no CLKOUT, default divisor */
mrf24j40_setreg(dev->spi, MRF24J40_BBREG6 , 0x40); /* 01000000 Append RSSI to rx packets */
return OK;
}
/****************************************************************************
* Name: mrf24j40_setrxmode
*
* Description:
* Set the RX mode (normal, promiscuous, no CRC)
*
****************************************************************************/
static int mrf24j40_setrxmode(FAR struct mrf24j40_dev_s *dev, int mode)
{
uint8_t reg;
if (mode < MRF24J40_RXMODE_NORMAL || mode > MRF24J40_RXMODE_NOCRC)
{
return -EINVAL;
}
reg = mrf24j40_getreg(dev->spi, MRF24J40_RXMCR);
reg &= ~0x03;
reg |= mode;
/* Set mode options */
if (mode != MRF24J40_RXMODE_NORMAL)
{
/* Promisc and error modes: Disable auto ACK */
reg |= MRF24J40_RXMCR_NOACKRSP;
}
else
{
/* Normal mode : enable auto-ACK */
reg &= ~MRF24J40_RXMCR_NOACKRSP;
}
mrf24j40_setreg(dev->spi, MRF24J40_RXMCR, reg);
dev->rxmode = mode;
winfo("%u\n", (unsigned)mode);
return OK;
}
/* Publicized driver routines */
/****************************************************************************
* Name: mrf24j40_setchannel
*
* Description:
* Define the current radio channel the device is operating on.
* In the 2.4 GHz, there are 16 channels, each 2 MHz wide, 5 MHz spacing:
* Chan MHz Chan MHz Chan MHz Chan MHz
* 11 2405 15 2425 19 2445 23 2465
* 12 2410 16 2430 20 2450 24 2470
* 13 2415 17 2435 21 2455 25 2475
* 14 2420 18 2440 22 2460 26 2480
*
****************************************************************************/
static int mrf24j40_setchannel(FAR struct ieee802154_dev_s *ieee,
uint8_t chan)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
if (chan<11 || chan>26)
{
werr("ERROR: Invalid chan: %d\n",chan);
return -EINVAL;
}
/* 15. Set channel – See Section 3.4 “Channel Selection”. */
mrf24j40_setreg(dev->spi, MRF24J40_RFCON0, (chan - 11) << 4 | 0x03);
/* 17. RFCTL (0x36) = 0x04 – Reset RF state machine.
* 18. RFCTL (0x36) = 0x00.
*/
mrf24j40_resetrfsm(dev);
dev->channel = chan;
//winfo("%u\n", (unsigned)chan);
return OK;
}
/****************************************************************************
* Name: mrf24j40_getchannel
*
* Description:
* Define the current radio channel the device is operating on.
*
****************************************************************************/
static int mrf24j40_getchannel(FAR struct ieee802154_dev_s *ieee,
FAR uint8_t *chan)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
*chan = dev->channel;
return OK;
}
/****************************************************************************
* Name: mrf24j40_setpanid
*
* Description:
* Define the PAN ID the device is operating on.
*
****************************************************************************/
static int mrf24j40_setpanid(FAR struct ieee802154_dev_s *ieee,
uint16_t panid)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
mrf24j40_setreg(dev->spi, MRF24J40_PANIDH, (uint8_t)(panid>>8));
mrf24j40_setreg(dev->spi, MRF24J40_PANIDL, (uint8_t)(panid&0xFF));
dev->panid = panid;
winfo("%04X\n", (unsigned)panid);
return OK;
}
/****************************************************************************
* Name: mrf24j40_getpanid
*
* Description:
* Define the current PAN ID the device is operating on.
*
****************************************************************************/
static int mrf24j40_getpanid(FAR struct ieee802154_dev_s *ieee,
FAR uint16_t *panid)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
*panid = dev->panid;
return OK;
}
/****************************************************************************
* Name: mrf24j40_setsaddr
*
* Description:
* Define the device short address. The following addresses are special:
* FFFEh : Broadcast
* FFFFh : Unspecified
*
****************************************************************************/
static int mrf24j40_setsaddr(FAR struct ieee802154_dev_s *ieee,
uint16_t saddr)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
mrf24j40_setreg(dev->spi, MRF24J40_SADRH, (uint8_t)(saddr>>8));
mrf24j40_setreg(dev->spi, MRF24J40_SADRL, (uint8_t)(saddr&0xFF));
dev->saddr = saddr;
winfo("%04X\n", (unsigned)saddr);
return OK;
}
/****************************************************************************
* Name: mrf24j40_getsaddr
*
* Description:
* Define the current short address the device is using.
*
****************************************************************************/
static int mrf24j40_getsaddr(FAR struct ieee802154_dev_s *ieee,
FAR uint16_t *saddr)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
*saddr = dev->saddr;
return OK;
}
/****************************************************************************
* Name: mrf24j40_seteaddr
*
* Description:
* Define the device extended address. The following addresses are special:
* FFFFFFFFFFFFFFFFh : Unspecified
*
****************************************************************************/
static int mrf24j40_seteaddr(FAR struct ieee802154_dev_s *ieee,
FAR uint8_t *eaddr)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
int i;
for (i=0; i<8; i++)
{
mrf24j40_setreg(dev->spi, MRF24J40_EADR0 + i, eaddr[i]);
dev->eaddr[i] = eaddr[i];
}
return OK;
}
/****************************************************************************
* Name: mrf24j40_geteaddr
*
* Description:
* Define the current extended address the device is using.
*
****************************************************************************/
static int mrf24j40_geteaddr(FAR struct ieee802154_dev_s *ieee,
FAR uint8_t *eaddr)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
memcpy(eaddr, dev->eaddr, 8);
return OK;
}
/****************************************************************************
* Name: mrf24j40_setpromisc
*
* Description:
* Set the device into promiscuous mode, e.g do not filter any incoming
* frame.
*
****************************************************************************/
static int mrf24j40_setpromisc(FAR struct ieee802154_dev_s *ieee,
bool promisc)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
return mrf24j40_setrxmode(dev, promisc ? MRF24J40_RXMODE_PROMISC :
MRF24J40_RXMODE_NORMAL);
}
/****************************************************************************
* Name: mrf24j40_getpromisc
*
* Description:
* Get the device receive mode.
*
****************************************************************************/
static int mrf24j40_getpromisc(FAR struct ieee802154_dev_s *ieee,
FAR bool *promisc)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
*promisc = (dev->rxmode == MRF24J40_RXMODE_PROMISC);
return OK;
}
/****************************************************************************
* Name: mrf24j40_setdevmode
*
* Description:
* Define the device behaviour: normal end device or coordinator
*
****************************************************************************/
static int mrf24j40_setdevmode(FAR struct ieee802154_dev_s *ieee,
uint8_t mode)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
int ret = OK;
uint8_t reg;
/* Disable slotted mode until I decide to implement slotted mode */
reg = mrf24j40_getreg(dev->spi, MRF24J40_TXMCR);
reg &= ~MRF24J40_TXMCR_SLOTTED;
mrf24j40_setreg(dev->spi, MRF24J40_TXMCR, reg);
mrf24j40_setreg(dev->spi, MRF24J40_ORDER, 0xFF);
/* Define dev mode */
reg = mrf24j40_getreg(dev->spi, MRF24J40_RXMCR);
if (mode == IEEE802154_MODE_PANCOORD)
{
reg |= MRF24J40_RXMCR_PANCOORD;
reg &= ~MRF24J40_RXMCR_COORD;
}
else if (mode == IEEE802154_MODE_COORD)
{
reg |= MRF24J40_RXMCR_COORD;
reg &= ~MRF24J40_RXMCR_PANCOORD;
}
else if (mode == IEEE802154_MODE_DEVICE)
{
reg &= ~MRF24J40_RXMCR_PANCOORD;
reg &= ~MRF24J40_RXMCR_COORD;
}
else
{
return -EINVAL;
}
mrf24j40_setreg(dev->spi, MRF24J40_RXMCR, reg);
dev->devmode = mode;
return ret;
}
/****************************************************************************
* Name: mrf24j40_setdevmode
*
* Description:
* Return the current device mode
*
****************************************************************************/
static int mrf24j40_getdevmode(FAR struct ieee802154_dev_s *ieee,
FAR uint8_t *mode)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
*mode = dev->devmode;
return OK;
}
/****************************************************************************
* Name: mrf24j40_settxpower
*
* Description:
* Define the transmit power. Value is passed in mBm, it is rounded to
* the nearest value. Some MRF modules have a power amplifier, this routine
* does not care about this. We only change the CHIP output power.
*
****************************************************************************/
static int mrf24j40_settxpower(FAR struct ieee802154_dev_s *ieee,
int32_t txpwr)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
uint8_t reg;
int save_txpwr = txpwr;
if (txpwr <= -3000 && txpwr > -3630)
{
reg = 0xC0;
txpwr += 3000;
}
else if (txpwr <= -2000)
{
reg = 0x80;
txpwr += 2000;
}
else if (txpwr <= -1000)
{
reg = 0x40;
txpwr += 1000;
}
else if (txpwr <= 0)
{
reg = 0x00;
}
else
{
return -EINVAL;
}
_info("remaining attenuation: %d mBm\n",txpwr);
switch(txpwr/100)
{
case -9:
case -8:
case -7:
case -6: reg |= 0x07; break;
case -5: reg |= 0x06; break;
case -4: reg |= 0x05; break;
case -3: reg |= 0x04; break;
case -2: reg |= 0x03; break;
case -1: reg |= 0x02; break;
case 0: reg |= 0x00; break; /* value 0x01 is 0.5 db, not used */
default: return -EINVAL;
}
mrf24j40_setreg(dev->spi, MRF24J40_RFCON3, reg);
dev->txpower = save_txpwr;
return OK;
}
/****************************************************************************
* Name: mrf24j40_gettxpower
*
* Description:
* Return the actual transmit power, in mBm.
*
****************************************************************************/
static int mrf24j40_gettxpower(FAR struct ieee802154_dev_s *ieee,
FAR int32_t *txpwr)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
*txpwr = dev->txpower;
return OK;
}
/****************************************************************************
* Name: mrf24j40_setcca
*
* Description:
* Define the Clear Channel Assessement method.
*
****************************************************************************/
static int mrf24j40_setcca(FAR struct ieee802154_dev_s *ieee,
FAR struct ieee802154_cca_s *cca)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
uint8_t mode;
if (!cca->use_ed && !cca->use_cs)
{
return -EINVAL;
}
if (cca->use_cs && cca->csth > 0x0f)
{
return -EINVAL;
}
mode = mrf24j40_getreg(dev->spi, MRF24J40_BBREG2);
mode &= 0x03;
if (cca->use_ed)
{
mode |= MRF24J40_BBREG2_CCAMODE_ED;
mrf24j40_setreg(dev->spi, MRF24J40_CCAEDTH, cca->edth);
}
if (cca->use_cs)
{
mode |= MRF24J40_BBREG2_CCAMODE_CS;
mode |= cca->csth << 2;
}
mrf24j40_setreg(dev->spi, MRF24J40_BBREG2, mode);
memcpy(&dev->cca, cca, sizeof(struct ieee802154_cca_s));
return OK;
}
/****************************************************************************
* Name: mrf24j40_getcca
*
* Description:
* Return the Clear Channel Assessement method.
*
****************************************************************************/
static int mrf24j40_getcca(FAR struct ieee802154_dev_s *ieee,
FAR struct ieee802154_cca_s *cca)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
memcpy(cca, &dev->cca, sizeof(struct ieee802154_cca_s));
return OK;
}
/****************************************************************************
* Name: mrf24j40_regdump
*
* Description:
* Display the value of all registers.
*
****************************************************************************/
static int mrf24j40_regdump(FAR struct mrf24j40_dev_s *dev)
{
uint32_t i;
char buf[4+16*3+2+1];
int len=0;
winfo("Short regs:\n");
for (i = 0; i < 0x40; i++)
{
if ((i & 15) == 0)
{
len=sprintf(buf, "%02x: ",i&0xFF);
}
len += sprintf(buf+len, "%02x ", mrf24j40_getreg(dev->spi, i));
if ((i & 15) == 15)
{
sprintf(buf+len, "\n");
winfo("%s", buf);
}
}
winfo("Long regs:\n");
for (i=0x80000200;i<0x80000250;i++)
{
if ((i&15)==0)
{
len=sprintf(buf, "%02x: ",i&0xFF);
}
len += sprintf(buf+len, "%02x ", mrf24j40_getreg(dev->spi, i));
if ((i & 15) == 15)
{
sprintf(buf+len, "\n");
winfo("%s", buf);
}
}
return 0;
}
/****************************************************************************
* Name: mrf24j40_ioctl
*
* Description:
* Misc/unofficial device controls.
*
****************************************************************************/
static int mrf24j40_ioctl(FAR struct ieee802154_dev_s *ieee, int cmd,
unsigned long arg)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
switch(cmd)
{
case 1000:
return mrf24j40_regdump(dev);
case 1001: dev->paenabled = (uint8_t)arg;
winfo("PA %sabled\n", arg ? "en" : "dis");
return OK;
default:
return -ENOTTY;
}
}
/****************************************************************************
* Name: mrf24j40_energydetect
*
* Description:
* Measure the RSSI level for the current channel.
*
****************************************************************************/
static int mrf24j40_energydetect(FAR struct ieee802154_dev_s *ieee,
FAR uint8_t *energy)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
uint8_t reg;
/* Manually enable the LNA*/
mrf24j40_pacontrol(dev, MRF24J40_PA_ED);
/* Set RSSI average duration to 8 symbols */
reg = mrf24j40_getreg(dev->spi, MRF24J40_TXBCON1);
reg |= 0x30;
mrf24j40_setreg(dev->spi, MRF24J40_TXBCON1, reg);
/* 1. Set RSSIMODE1 0x3E<7> – Initiate RSSI calculation. */
mrf24j40_setreg(dev->spi, MRF24J40_BBREG6, 0x80);
/* 2. Wait until RSSIRDY 0x3E<0> is set to ‘1’ – RSSI calculation is
* complete.
*/
while(!(mrf24j40_getreg(dev->spi, MRF24J40_BBREG6) & 0x01));
/* 3. Read RSSI 0x210<7:0> – The RSSI register contains the averaged RSSI
* received power level for 8 symbol periods.
*/
*energy = mrf24j40_getreg(dev->spi, MRF24J40_RSSI);
mrf24j40_setreg(dev->spi, MRF24J40_BBREG6, 0x40);
/* Back to automatic control */
mrf24j40_pacontrol(dev, MRF24J40_PA_AUTO);
return OK;
}
/* Packet exchange */
/****************************************************************************
* Name: mrf24j40_transmit
*
* Description:
* Send a regular packet over the air.
*
****************************************************************************/
static int mrf24j40_transmit(FAR struct ieee802154_dev_s *ieee, FAR struct ieee802154_packet_s *packet)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
uint32_t addr;
uint8_t reg;
int ret;
int hlen = 3; /* include frame control and seq number */
uint8_t fc1, fc2;
mrf24j40_pacontrol(dev, MRF24J40_PA_AUTO);
addr = 0x80000000;
/* Enable tx int */
reg = mrf24j40_getreg(dev->spi, MRF24J40_INTCON);
reg &= ~MRF24J40_INTCON_TXNIE;
mrf24j40_setreg(dev->spi, MRF24J40_INTCON, reg);
/* Analyze frame control to compute header length */
fc1 = packet->data[0];
fc2 = packet->data[1];
// winfo("fc1 %02X fc2 %02X\n", fc1,fc2);
if ((fc2 & IEEE802154_FC2_DADDR) == IEEE802154_DADDR_SHORT)
{
hlen += 2 + 2; /* Destination PAN + shortaddr */
}
else if ((fc2 & IEEE802154_FC2_DADDR) == IEEE802154_DADDR_EXT)
{
hlen += 2 + 8; /* Destination PAN + extaddr */
}
if ((fc2 & IEEE802154_FC2_SADDR) == IEEE802154_SADDR_SHORT)
{
if ((fc1 & IEEE802154_FC1_INTRA) != IEEE802154_INTRA)
{
hlen += 2; /* No PAN compression, source PAN is different from dest PAN */
}
hlen += 2; /* Source saddr */
}
else if ((fc2 & IEEE802154_FC2_SADDR) == IEEE802154_SADDR_EXT)
{
if ((fc1 & IEEE802154_FC1_INTRA) != IEEE802154_INTRA)
{
hlen += 2; /* No PAN compression, source PAN is different from dest PAN */
}
hlen += 8; /* Ext saddr */
}
// winfo("hlen %d\n",hlen);
/* Header len, 0, TODO for security modes */
mrf24j40_setreg(dev->spi, addr++, hlen);
/* Frame length */
mrf24j40_setreg(dev->spi, addr++, packet->len);
/* Frame data */
for (ret = 0; ret < packet->len; ret++) /* this sets the correct val for ret */
{
mrf24j40_setreg(dev->spi, addr++, packet->data[ret]);
}
/* If the frame control field contains
* an acknowledgment request, set the TXNACKREQ bit.
* See IEEE 802.15.4/2003 7.2.1.1 page 112 for info.
*/
reg = MRF24J40_TXNCON_TXNTRIG;
if (fc1 & IEEE802154_FC1_ACKREQ)
{
reg |= MRF24J40_TXNCON_TXNACKREQ;
}
/* Trigger packet emission */
mrf24j40_setreg(dev->spi, MRF24J40_TXNCON, reg);
/* Suspend calling thread until transmit is complete */
return sem_wait(&ieee->txsem);
}
/****************************************************************************
* Name: mrf24j40_irqwork_tx
*
* Description:
* Manage completion of packet transmission.
*
****************************************************************************/
static void mrf24j40_irqwork_tx(FAR struct mrf24j40_dev_s *dev)
{
uint8_t txstat;
uint8_t reg;
txstat = mrf24j40_getreg(dev->spi, MRF24J40_TXSTAT);
/* 1 means it failed, we want 1 to mean it worked.
* tx_ok = !(tmp & ~(1 << TXNSTAT));
* retries = tmp >> 6;
* channel_busy = (tmp & (1 << CCAFAIL));
*/
//winfo("TXSTAT%02X!\n", txstat);
#warning TODO report errors
UNUSED(txstat);
/* Disable tx int */
reg = mrf24j40_getreg(dev->spi, MRF24J40_INTCON);
reg |= MRF24J40_INTCON_TXNIE;
mrf24j40_setreg(dev->spi, MRF24J40_INTCON, reg);
/* Wake up the thread that triggered the transmission */
sem_post(&dev->ieee.txsem);
}
/****************************************************************************
* Name: mrf24j40_enablerx
*
* Description:
* Enable reception of a packet. The interrupt will signal the rx semaphore.
*
****************************************************************************/
static int mrf24j40_rxenable(FAR struct ieee802154_dev_s *ieee, bool state,
FAR struct ieee802154_packet_s *packet)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)ieee;
uint8_t reg;
if (state)
{
mrf24j40_pacontrol(dev, MRF24J40_PA_AUTO);
ieee->rxbuf = packet;
/* Enable rx int */
reg = mrf24j40_getreg(dev->spi, MRF24J40_INTCON);
reg &= ~MRF24J40_INTCON_RXIE;
mrf24j40_setreg(dev->spi, MRF24J40_INTCON, reg);
}
else
{
ieee->rxbuf = NULL;
}
return OK;
}
/****************************************************************************
* Name: mrf24j40_irqwork_rx
*
* Description:
* Manage packet reception.
*
****************************************************************************/
static void mrf24j40_irqwork_rx(FAR struct mrf24j40_dev_s *dev)
{
uint32_t addr;
uint32_t index;
uint8_t reg;
/*winfo("!\n");*/
/* Disable rx int */
reg = mrf24j40_getreg(dev->spi, MRF24J40_INTCON);
reg |= MRF24J40_INTCON_RXIE;
mrf24j40_setreg(dev->spi, MRF24J40_INTCON, reg);
/* Disable packet reception */
mrf24j40_setreg(dev->spi, MRF24J40_BBREG1, MRF24J40_BBREG1_RXDECINV);
/* Read packet */
addr = 0x80000300;
dev->ieee.rxbuf->len = mrf24j40_getreg(dev->spi, addr++);
/*winfo("len %3d\n", dev->ieee.rxbuf->len);*/
for (index = 0; index < dev->ieee.rxbuf->len; index++)
{
dev->ieee.rxbuf->data[index] = mrf24j40_getreg(dev->spi, addr++);
}
dev->ieee.rxbuf->lqi = mrf24j40_getreg(dev->spi, addr++);
dev->ieee.rxbuf->rssi = mrf24j40_getreg(dev->spi, addr++);
/* Reduce len by 2, we only receive frames with correct crc, no check required */
dev->ieee.rxbuf->len -= 2;
/* Enable reception of next packet by flushing the fifo.
* This is an MRF24J40 errata (no. 1).
*/
mrf24j40_setreg(dev->spi, MRF24J40_RXFLUSH, 1);
/* Enable packet reception */
mrf24j40_setreg(dev->spi, MRF24J40_BBREG1, 0);
sem_post(&dev->ieee.rxsem);
}
/****************************************************************************
* Name: mrf24j40_irqworker
*
* Description:
* Perform interrupt handling logic outside of the interrupt handler (on
* the work queue thread).
*
* Parameters:
* arg - The reference to the driver structure (cast to void*)
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
static void mrf24j40_irqworker(FAR void *arg)
{
FAR struct mrf24j40_dev_s *dev = (FAR struct mrf24j40_dev_s *)arg;
uint8_t intstat;
DEBUGASSERT(dev);
DEBUGASSERT(dev->spi);
/* Read and store INTSTAT - this clears the register. */
intstat = mrf24j40_getreg(dev->spi, MRF24J40_INTSTAT);
// winfo("INT%02X\n", intstat);
/* Do work according to the pending interrupts */
if ((intstat & MRF24J40_INTSTAT_RXIF))
{
/* A packet was received, retrieve it */
mrf24j40_irqwork_rx(dev);
}
if ((intstat & MRF24J40_INTSTAT_TXNIF))
{
/* A packet was transmitted or failed*/
mrf24j40_irqwork_tx(dev);
}
/* Re-Enable GPIO interrupts */
dev->lower->enable(dev->lower, TRUE);
}
/****************************************************************************
* Name: mrf24j40_interrupt
*
* Description:
* Hardware interrupt handler
*
* Parameters:
* irq - Number of the IRQ that generated the interrupt
* context - Interrupt register state save info (architecture-specific)
*
* Returned Value:
* OK on success
*
* Assumptions:
*
****************************************************************************/
static int mrf24j40_interrupt(int irq, FAR void *context)
{
/* To support multiple devices,
* retrieve the priv structure using the irq number
*/
register FAR struct mrf24j40_dev_s *dev = &g_mrf24j40_devices[0];
/* In complex environments, we cannot do SPI transfers from the interrupt
* handler because semaphores are probably used to lock the SPI bus. In
* this case, we will defer processing to the worker thread. This is also
* much kinder in the use of system resources and is, therefore, probably
* a good thing to do in any event.
*/
DEBUGASSERT(work_available(&dev->irqwork));
/* Notice that further GPIO interrupts are disabled until the work is
* actually performed. This is to prevent overrun of the worker thread.
* Interrupts are re-enabled in enc_irqworker() when the work is completed.
*/
dev->lower->enable(dev->lower, FALSE);
return work_queue(HPWORK, &dev->irqwork, mrf24j40_irqworker, (FAR void *)dev, 0);
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: mrf24j40_init
*
* Description:
* Return an mrf24j40 device for use by other drivers.
*
****************************************************************************/
FAR struct ieee802154_dev_s *mrf24j40_init(FAR struct spi_dev_s *spi,
FAR const struct mrf24j40_lower_s *lower)
{
FAR struct mrf24j40_dev_s *dev;
struct ieee802154_cca_s cca;
#if 0
dev = kmm_zalloc(sizeof(struct mrf24j40_dev_s));
if (!dev)
{
return NULL;
}
#else
dev = &g_mrf24j40_devices[0];
#endif
/* Attach irq */
if (lower->attach(lower, mrf24j40_interrupt) != OK)
{
#if 0
free(dev);
#endif
return NULL;
}
dev->ieee.ops = &mrf24j40_devops;
sem_init(&dev->ieee.rxsem, 0, 0);
sem_init(&dev->ieee.txsem, 0, 0);
dev->lower = lower;
dev->spi = spi;
mrf24j40_initialize(dev);
mrf24j40_setchannel(&dev->ieee, 11);
mrf24j40_setpanid (&dev->ieee, IEEE802154_PAN_DEFAULT);
mrf24j40_setsaddr (&dev->ieee, IEEE802154_SADDR_UNSPEC);
mrf24j40_seteaddr (&dev->ieee, IEEE802154_EADDR_UNSPEC);
/* Default device params */
cca.use_ed = 1;
cca.use_cs = 0;
cca.edth = 0x60; /* CCA mode ED, no carrier sense, recommenced ED threshold -69 dBm */
mrf24j40_setcca(&dev->ieee, &cca);
mrf24j40_setrxmode(dev, MRF24J40_RXMODE_NORMAL);
mrf24j40_settxpower(&dev->ieee, 0); /*16. Set transmitter power .*/
mrf24j40_pacontrol(dev, MRF24J40_PA_AUTO);
dev->lower->enable(dev->lower, TRUE);
return &dev->ieee;
}
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