/**************************************************************************** * drivers/wireless/ieee802154/mrf24j40.c * * Copyright (C) 2015-2016 Sebastien Lorquet. All rights reserved. * Author: Sebastien Lorquet * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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_radio_s { struct ieee802154_radio_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_radio_s *dev); static int mrf24j40_pacontrol(FAR struct mrf24j40_radio_s *dev, int mode); static int mrf24j40_initialize(FAR struct mrf24j40_radio_s *dev); static int mrf24j40_setrxmode(FAR struct mrf24j40_radio_s *dev, int mode); static int mrf24j40_regdump(FAR struct mrf24j40_radio_s *dev); static void mrf24j40_irqwork_rx(FAR struct mrf24j40_radio_s *dev); static void mrf24j40_irqwork_tx(FAR struct mrf24j40_radio_s *dev); static void mrf24j40_irqworker(FAR void *arg); static int mrf24j40_interrupt(int irq, FAR void *context, FAR void *arg); /* Driver operations */ static int mrf24j40_setchannel(FAR struct ieee802154_radio_s *ieee, uint8_t chan); static int mrf24j40_getchannel(FAR struct ieee802154_radio_s *ieee, FAR uint8_t *chan); static int mrf24j40_setpanid(FAR struct ieee802154_radio_s *ieee, uint16_t panid); static int mrf24j40_getpanid(FAR struct ieee802154_radio_s *ieee, FAR uint16_t *panid); static int mrf24j40_setsaddr(FAR struct ieee802154_radio_s *ieee, uint16_t saddr); static int mrf24j40_getsaddr(FAR struct ieee802154_radio_s *ieee, FAR uint16_t *saddr); static int mrf24j40_seteaddr(FAR struct ieee802154_radio_s *ieee, FAR uint8_t *eaddr); static int mrf24j40_geteaddr(FAR struct ieee802154_radio_s *ieee, FAR uint8_t *eaddr); static int mrf24j40_setpromisc(FAR struct ieee802154_radio_s *ieee, bool promisc); static int mrf24j40_getpromisc(FAR struct ieee802154_radio_s *ieee, FAR bool *promisc); static int mrf24j40_setdevmode(FAR struct ieee802154_radio_s *ieee, uint8_t mode); static int mrf24j40_getdevmode(FAR struct ieee802154_radio_s *ieee, FAR uint8_t *mode); static int mrf24j40_settxpower(FAR struct ieee802154_radio_s *ieee, int32_t txpwr); static int mrf24j40_gettxpower(FAR struct ieee802154_radio_s *ieee, FAR int32_t *txpwr); static int mrf24j40_setcca(FAR struct ieee802154_radio_s *ieee, FAR struct ieee802154_cca_s *cca); static int mrf24j40_getcca(FAR struct ieee802154_radio_s *ieee, FAR struct ieee802154_cca_s *cca); static int mrf24j40_ioctl(FAR struct ieee802154_radio_s *ieee, int cmd, unsigned long arg); static int mrf24j40_energydetect(FAR struct ieee802154_radio_s *ieee, FAR uint8_t *energy); static int mrf24j40_rxenable(FAR struct ieee802154_radio_s *ieee, bool state, FAR struct ieee802154_packet_s *packet); static int mrf24j40_transmit(FAR struct ieee802154_radio_s *ieee, FAR struct ieee802154_packet_s *packet); /**************************************************************************** * Private Data ****************************************************************************/ /* 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_radio_s g_mrf24j40_devices[1]; static const struct ieee802154_radioops_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 ****************************************************************************/ /**************************************************************************** * 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); /* wlinfo("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_radio_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_radio_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_radio_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_radio_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; wlinfo("%u\n", (unsigned)mode); return OK; } /**************************************************************************** * 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_radio_s *ieee, uint8_t chan) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_s *)ieee; if (chan < 11 || chan > 26) { wlerr("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; //wlinfo("%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_radio_s *ieee, FAR uint8_t *chan) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_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_radio_s *ieee, uint16_t panid) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_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; wlinfo("%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_radio_s *ieee, FAR uint16_t *panid) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_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_radio_s *ieee, uint16_t saddr) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_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; wlinfo("%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_radio_s *ieee, FAR uint16_t *saddr) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_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_radio_s *ieee, FAR uint8_t *eaddr) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_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_radio_s *ieee, FAR uint8_t *eaddr) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_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_radio_s *ieee, bool promisc) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_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_radio_s *ieee, FAR bool *promisc) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_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_radio_s *ieee, uint8_t mode) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_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_radio_s *ieee, FAR uint8_t *mode) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_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_radio_s *ieee, int32_t txpwr) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_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; } wlinfo("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; /* value 0x01 is 0.5 db, not used */ break; 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_radio_s *ieee, FAR int32_t *txpwr) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_s *)ieee; *txpwr = dev->txpower; return OK; } /**************************************************************************** * Name: mrf24j40_setcca * * Description: * Define the Clear Channel Assessement method. * ****************************************************************************/ static int mrf24j40_setcca(FAR struct ieee802154_radio_s *ieee, FAR struct ieee802154_cca_s *cca) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_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_radio_s *ieee, FAR struct ieee802154_cca_s *cca) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_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_radio_s *dev) { uint32_t i; char buf[4+16*3+2+1]; int len = 0; wlinfo("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"); wlinfo("%s", buf); } } wlinfo("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"); wlinfo("%s", buf); } } return 0; } /**************************************************************************** * Name: mrf24j40_ioctl * * Description: * Misc/unofficial device controls. * ****************************************************************************/ static int mrf24j40_ioctl(FAR struct ieee802154_radio_s *ieee, int cmd, unsigned long arg) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_s *)ieee; switch(cmd) { case 1000: return mrf24j40_regdump(dev); case 1001: dev->paenabled = (uint8_t)arg; wlinfo("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_radio_s *ieee, FAR uint8_t *energy) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_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_radio_s *ieee, FAR struct ieee802154_packet_s *packet) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_s *)ieee; uint32_t addr; uint8_t reg; int ret; int hlen = 3; /* Include frame control and seq number */ uint16_t frame_ctrl; mrf24j40_pacontrol(dev, MRF24J40_PA_AUTO); addr = MRF24J40_TXBUF_BASE; /* 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 */ frame_ctrl = packet->data[0]; frame_ctrl |= packet->data[1] << 8; if ((frame_ctrl & IEEE802154_FRAMECTRL_DADDR)== IEEE802154_ADDRMODE_SHORT) { hlen += 2 + 2; /* Destination PAN + shortaddr */ } else if ((frame_ctrl & IEEE802154_FRAMECTRL_DADDR) == IEEE802154_ADDRMODE_EXTENDED) { hlen += 2 + 8; /* Destination PAN + extaddr */ } if (!(frame_ctrl & IEEE802154_FRAMECTRL_INTRA)) { hlen += 2; /* No PAN compression, source PAN is different from dest PAN */ } if ((frame_ctrl & IEEE802154_FRAMECTRL_SADDR)== IEEE802154_ADDRMODE_SHORT) { hlen += 2; /* Source saddr */ } else if ((frame_ctrl & IEEE802154_FRAMECTRL_SADDR) == IEEE802154_ADDRMODE_EXTENDED) { hlen += 8; /* Ext saddr */ } /* 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 (frame_ctrl & IEEE802154_FRAMECTRL_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_radio_s *dev) { uint8_t txstat; uint8_t reg; txstat = mrf24j40_getreg(dev->spi, MRF24J40_TXSTAT); reg = mrf24j40_getreg(dev->spi, MRF24J40_TXSTAT); /* 1 means it failed, we want 1 to mean it worked. */ dev->ieee.txok = (reg & MRF24J40_TXSTAT_TXNSTAT) != MRF24J40_TXSTAT_TXNSTAT; dev->ieee.txretries = (reg & MRF24J40_TXSTAT_X_MASK) >> MRF24J40_TXSTAT_X_SHIFT; dev->ieee.txbusy = (reg & MRF24J40_TXSTAT_CCAFAIL) == MRF24J40_TXSTAT_CCAFAIL; //wlinfo("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_rxenable * * Description: * Enable reception of a packet. The interrupt will signal the rx semaphore. * ****************************************************************************/ static int mrf24j40_rxenable(FAR struct ieee802154_radio_s *ieee, bool state, FAR struct ieee802154_packet_s *packet) { FAR struct mrf24j40_radio_s *dev = (FAR struct mrf24j40_radio_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_radio_s *dev) { uint32_t addr; uint32_t index; uint8_t reg; /* wlinfo("!\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 = MRF24J40_RXBUF_BASE; dev->ieee.rxbuf->len = mrf24j40_getreg(dev->spi, addr++); /* wlinfo("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_radio_s *dev = (FAR struct mrf24j40_radio_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); //wlinfo("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, FAR void *arg) { /* To support multiple devices, * retrieve the priv structure using the irq number * * REVISIT: This will not handler multiple MRF24J40 devices. The correct * solutions is to pass the struct mrf24j40_radio_s in the call to * irq_attach() as the third 'arg' parameter. That will be provided here * and the correct instance can be obtained with a simply case of 'arg'. */ register FAR struct mrf24j40_radio_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_radio_s *mrf24j40_init(FAR struct spi_dev_s *spi, FAR const struct mrf24j40_lower_s *lower) { FAR struct mrf24j40_radio_s *dev; struct ieee802154_cca_s cca; #if 0 dev = kmm_zalloc(sizeof(struct mrf24j40_radio_s)); if (dev == NULL) { return NULL; } #else dev = &g_mrf24j40_devices[0]; #endif /* Attach irq. * * REVISIT: A third argument is required to pass the instance of 'lower' * to the interrupt handler. */ if (lower->attach(lower, mrf24j40_interrupt) != OK) { #if 0 free(dev); #endif return NULL; } dev->ieee.ops = &mrf24j40_devops; /* Initialize semaphores */ sem_init(&dev->ieee.rxsem, 0, 0); sem_init(&dev->ieee.txsem, 0, 0); /* These semaphores are all used for signaling and, hence, should * not have priority inheritance enabled. */ sem_setprotocol(&dev->ieee.rxsem, SEM_PRIO_NONE); sem_setprotocol(&dev->ieee.txsem, SEM_PRIO_NONE); dev->lower = lower; dev->spi = spi; mrf24j40_initialize(dev); mrf24j40_setchannel(&dev->ieee, 11); mrf24j40_setpanid (&dev->ieee, 0xFFFF); mrf24j40_setsaddr (&dev->ieee, 0xFFFF); mrf24j40_seteaddr (&dev->ieee, (uint8_t*)"\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF"); /* 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; }