/**************************************************************************** * drivers/wireless/ieee802154/at86rf23x/at86rf23x.c * * Copyright (C) 2016 Matt Poppe. All rights reserved. * Author: Matt Poppe * * 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 "at86rf23x.h" /************************************************************************************ * Pre-processor Definitions ************************************************************************************/ #ifndef CONFIG_SCHED_HPWORK # error High priority work queue required in this driver #endif #ifndef CONFIG_SPI_EXCHANGE # error CONFIG_SPI_EXCHANGE required for this driver #endif #ifndef CONFIG_IEEE802154_at86rf23x_SPIMODE # define CONFIG_IEEE802154_at86rf23x_SPIMODE SPIDEV_MODE0 #endif #ifndef CONFIG_IEEE802154_at86rf23x_FREQUENCY # define CONFIG_IEEE802154_at86rf23x_FREQUENCY 1000000 #endif /* Definitions for the device structure */ #define AT86RF23X_RXMODE_NORMAL 0 #define AT86RF23X_RXMODE_PROMISC 1 #define AT86RF23X_RXMODE_NOCRC 2 #define AT86RF23X_RXMODE_AUTOACK 3 /* Definitions for PA control on high power modules */ #define AT86RF23X_PA_AUTO 1 #define AT86RF23X_PA_ED 2 #define AT86RF23X_PA_SLEEP 3 /************************************************************************************ * Private Types ************************************************************************************/ /* AT86RF23x device instance * * Make sure that struct ieee802154_radio_s remains first. If not it will break the * code */ struct at86rf23x_dev_s { struct ieee802154_radio_s ieee; /* 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 at86rf23x_lower_s *lower; /* Low-level MCU-specific support */ uint8_t panid[2]; /* 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 at86rf23x_lock(FAR struct spi_dev_s *spi); static void at86rf23x_unlock(FAR struct spi_dev_s *spi); static void at86rf23x_setreg(FAR struct spi_dev_s *spi, uint32_t addr, uint8_t val); static uint8_t at86rf23x_getreg(FAR struct spi_dev_s *spi, uint32_t addr); static int at86rf23x_writeframe(FAR struct spi_dev_s *spi, FAR uint8_t *frame, uint8_t len); static uint8_t at86rf23x_readframe(FAR struct spi_dev_s *spi, FAR uint8_t *frame_rx); static int at86rf23x_setTRXstate(FAR struct at86rf23x_dev_s *dev, uint8_t state, uint8_t force); static uint8_t at86rf23x_getTRXstate(FAR struct at86rf23x_dev_s *dev); static int at86rf23x_resetrf(FAR struct at86rf23x_dev_s *dev); static int at86rf23x_initialize(FAR struct at86rf23x_dev_s *dev); static int at86rf23x_regdump(FAR struct at86rf23x_dev_s *dev); static void at86rf23x_irqwork_rx(FAR struct at86rf23x_dev_s *dev); static void at86rf23x_irqwork_tx(FAR struct at86rf23x_dev_s *dev); static void at86rf23x_irqworker(FAR void *arg); static int at86rf23x_interrupt(int irq, FAR void *context, FAR void *arg); static int at86rf23x_setchannel(FAR struct ieee802154_radio_s *ieee, uint8_t chan); static int at86rf23x_getchannel(FAR struct ieee802154_radio_s *ieee, FAR uint8_t *chan); static int at86rf23x_setpanid(FAR struct ieee802154_radio_s *ieee, uint16_t panid); static int at86rf23x_getpanid(FAR struct ieee802154_radio_s *ieee, FAR uint16_t *panid); static int at86rf23x_setsaddr(FAR struct ieee802154_radio_s *ieee, uint16_t saddr); static int at86rf23x_getsaddr(FAR struct ieee802154_radio_s *ieee, FAR uint16_t *saddr); static int at86rf23x_seteaddr(FAR struct ieee802154_radio_s *ieee, FAR uint8_t *eaddr); static int at86rf23x_geteaddr(FAR struct ieee802154_radio_s *ieee, FAR uint8_t *eaddr); static int at86rf23x_setpromisc(FAR struct ieee802154_radio_s *ieee, bool promisc); static int at86rf23x_getpromisc(FAR struct ieee802154_radio_s *ieee, FAR bool *promisc); static int at86rf23x_setdevmode(FAR struct ieee802154_radio_s *ieee, uint8_t mode); static int at86rf23x_getdevmode(FAR struct ieee802154_radio_s *ieee, FAR uint8_t *mode); static int at86rf23x_settxpower(FAR struct ieee802154_radio_s *ieee, int32_t txpwr); static int at86rf23x_gettxpower(FAR struct ieee802154_radio_s *ieee, FAR int32_t *txpwr); static int at86rf23x_setcca(FAR struct ieee802154_radio_s *ieee, FAR struct ieee802154_cca_s *cca); static int at86rf23x_getcca(FAR struct ieee802154_radio_s *ieee, FAR struct ieee802154_cca_s *cca); static int at86rf23x_energydetect(FAR struct ieee802154_radio_s *ieee, FAR uint8_t *energy); /* Driver operations */ static int at86rf23x_rxenable(FAR struct ieee802154_radio_s *ieee, bool state, FAR struct ieee802154_packet_s *packet); static int at86rf23x_transmit(FAR struct ieee802154_radio_s *ieee, FAR struct ieee802154_packet_s *packet); /**************************************************************************** * Private Data ****************************************************************************/ /* These are pointers to ALL registered at86rf23x 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 at86rf23x_dev_s g_at86rf23x_devices[1]; static const struct ieee802154_radioops_s at86rf23x_devops = { .ioctl = at86rf23x_ioctl, .rxenable = at86rf23x_rxenable, .transmit = at86rf23x_transmit }; /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Name: at86rf23x_lock * * Description: * Acquire exclusive access to the shared SPI bus. * ****************************************************************************/ static void at86rf23x_lock(FAR struct spi_dev_s *spi) { SPI_LOCK(spi, 1); SPI_SETBITS(spi, 8); SPI_SETMODE(spi, CONFIG_IEEE802154_at86rf23x_SPIMODE); SPI_SETFREQUENCY(spi, CONFIG_IEEE802154_at86rf23x_FREQUENCY); } /**************************************************************************** * Name: at86rf23x_unlock * * Description: * Release exclusive access to the shared SPI bus. * ****************************************************************************/ static void at86rf23x_unlock(FAR struct spi_dev_s *spi) { SPI_LOCK(spi, 0); } /**************************************************************************** * Name: at86rf23x_setreg * * Description: * Define the value of an at86rf23x device register * ****************************************************************************/ static void at86rf23x_setreg(FAR struct spi_dev_s *spi, uint32_t addr, uint8_t val) { uint8_t reg[2]; reg[0] = addr; reg[0] |= RF23X_SPI_REG_WRITE; reg[1] = val; at86rf23x_lock(spi); SPI_SELECT(spi, SPIDEV_IEEE802154(0), true); SPI_SNDBLOCK(spi, reg, 2); SPI_SELECT(spi, SPIDEV_IEEE802154(0), false); at86rf23x_unlock(spi); wlinfo("0x%02X->r[0x%02X]\n", val, addr); } /**************************************************************************** * Name: at86rf23x_getreg * * Description: * Return the value of an at86rf23x device register * ****************************************************************************/ static uint8_t at86rf23x_getreg(FAR struct spi_dev_s *spi, uint32_t addr) { uint8_t reg[2]; uint8_t val[2]; /* Add Read mask to desired register */ reg[0] = addr | RF23X_SPI_REG_READ; at86rf23x_lock (spi); SPI_SELECT(spi, SPIDEV_IEEE802154(0), true); SPI_EXCHANGE(spi, reg, val, 2); SPI_SELECT(spi, SPIDEV_IEEE802154(0), false); at86rf23x_unlock(spi); wlinfo("r[0x%02X]=0x%02X\n",addr,val[1]); return val[1]; } /**************************************************************************** * Name: at86rf23x_setregbits * * Description: * Read the current value of the register. Change only the portion * of the register we need to change and write the value back to the * register. * ****************************************************************************/ static void at86rf23x_setregbits(FAR struct spi_dev_s *spi, uint8_t addr, uint8_t pos, uint8_t mask, uint8_t val) { uint8_t reg; reg = at86rf23x_getreg(spi, addr); reg = (reg & ~(mask << pos)) | (val << pos); at86rf23x_setreg(spi, addr, reg); } /**************************************************************************** * Name: at86rf23x_getregbits * * Description: * Return the value of an section of the at86rf23x device register. * ****************************************************************************/ static uint8_t at86rf23x_getregbits(FAR struct spi_dev_s *spi, uint8_t addr, uint8_t pos, uint8_t mask) { uint8_t val; val = at86rf23x_getreg(spi, addr); val = (val >> pos) & mask; return val; } /**************************************************************************** * Name: at86rf23x_writebuffer * * Description: * Write frame to the transmit buffer of the radio. This does not * initiate the transfer, just write to the buffer. * ****************************************************************************/ static int at86rf23x_writeframe(FAR struct spi_dev_s *spi, FAR uint8_t *frame, uint8_t len) { //report_packet(frame_wr, len); uint8_t reg = RF23X_SPI_FRAME_WRITE; at86rf23x_lock(spi); SPI_SELECT(spi, SPIDEV_IEEE802154(0), true); SPI_SNDBLOCK(spi, ®, 1); SPI_SNDBLOCK(spi, &frame, len); SPI_SELECT(spi, SPIDEV_IEEE802154(0), false); at86rf23x_unlock(spi); return len; } /**************************************************************************** * Name: at86rf23x_readframe * * Description: * Read the buffer memory of the radio. This is used when the radio * indicates a frame has been received. * ****************************************************************************/ static uint8_t at86rf23x_readframe(FAR struct spi_dev_s *spi, FAR uint8_t *frame_rx) { uint8_t len, reg; reg = RF23X_SPI_FRAME_READ; at86rf23x_lock(spi); SPI_SELECT(spi, SPIDEV_IEEE802154(0), true); SPI_SNDBLOCK(spi, ®, 1); SPI_RECVBLOCK(spi, &len, 1); SPI_RECVBLOCK(spi, frame_rx, len+3); SPI_SELECT(spi, SPIDEV_IEEE802154(0), false); at86rf23x_unlock(spi); return len; } /**************************************************************************** * Name: at86rf23x_getTRXstate * * Description: * Return the current status of the TRX state machine. * ****************************************************************************/ static uint8_t at86rf23x_getTRXstate(FAR struct at86rf23x_dev_s *dev) { return at86rf23x_getregbits(dev->spi, RF23X_TRXSTATUS_STATUS); } /**************************************************************************** * Name: at86rf23x_setTRXstate * * Description: * Set the TRX state machine to the desired state. If the state machine * cannot move to the desired state an ERROR is returned. If the transistion * is successful an OK is returned. This is a long running function due to * waiting for the transistion delay between states. This can be as long as * 510us. * ****************************************************************************/ static int at86rf23x_setTRXstate(FAR struct at86rf23x_dev_s *dev, uint8_t state, uint8_t force) { /* Get the current state of the transceiver */ uint8_t status = at86rf23x_getTRXstate(dev); int ret = OK; /* TODO I don't have every state included verify this will work with SLEEP */ if ((status != TRX_STATUS_TRXOFF) && (status != TRX_STATUS_RXON) && (status != TRX_STATUS_PLLON) && (status != TRX_STATUS_RXAACKON) && (status != TRX_STATUS_TXARETON) && (status != TRX_STATUS_PON)) { wlerr("ERROR: Invalid State\n"); return ERROR; } int8_t init_status = status; /* Start the state change */ switch(state) { case TRX_CMD_TRXOFF: if (status == TRX_STATUS_TRXOFF) { break; } /* verify in a state that will transfer to TRX_OFF if not check if * force is required. */ if ((status == TRX_STATUS_RXON) || (status == TRX_STATUS_PLLON) || (status == TRX_STATUS_RXAACKON) || (status == TRX_STATUS_TXARETON)) { at86rf23x_setregbits(dev->spi, RF23X_TRXCMD_STATE, TRX_CMD_TRXOFF); up_udelay(RF23X_TIME_TRANSITION_PLL_ACTIVE); } else if (status == TRX_STATUS_PON) { at86rf23x_setregbits(dev->spi, RF23X_TRXCMD_STATE, TRX_CMD_TRXOFF); up_udelay(RF23X_TIME_P_ON_TO_TRXOFF); } else if (force) { at86rf23x_setregbits(dev->spi, RF23X_TRXCMD_STATE, TRX_CMD_FORCETRXOFF); up_udelay(RF23X_TIME_FORCE_TRXOFF); } status = at86rf23x_getregbits(dev->spi, RF23X_TRXSTATUS_STATUS); if (status != TRX_STATUS_TRXOFF) { ret = ERROR; } break; case TRX_CMD_RX_ON: if (status == TRX_STATUS_RXON) { break; } if (status == TRX_STATUS_TRXOFF) { at86rf23x_setregbits(dev->spi, RF23X_TRXCMD_STATE, TRX_CMD_RX_ON); up_udelay(RF23X_TIME_TRXOFF_TO_PLL); } else if ((status == TRX_STATUS_RXAACKON) || (status == TRX_STATUS_RXON) || (status == TRX_STATUS_PLLON) || (status == TRX_STATUS_TXARETON)) { at86rf23x_setregbits(dev->spi, RF23X_TRXCMD_STATE, TRX_CMD_RX_ON); up_udelay(RF23X_TIME_TRANSITION_PLL_ACTIVE); } status = at86rf23x_getregbits(dev->spi, RF23X_TRXSTATUS_STATUS); if (status != TRX_STATUS_RXON) { ret = ERROR; } break; /* Transition to PLL_ON */ case TRX_CMD_PLL_ON: if (status == TRX_STATUS_PLLON) { break; } if (status == TRX_STATUS_TRXOFF) { at86rf23x_setregbits(dev->spi, RF23X_TRXCMD_STATE, TRX_CMD_PLL_ON); up_udelay(RF23X_TIME_TRXOFF_TO_PLL); } else { at86rf23x_setregbits(dev->spi, RF23X_TRXCMD_STATE, TRX_CMD_PLL_ON); up_udelay(RF23X_TIME_TRANSITION_PLL_ACTIVE); } status = at86rf23x_getregbits(dev->spi, RF23X_TRXSTATUS_STATUS); if (status != TRX_STATUS_PLLON) { ret = ERROR; } break; case TRX_CMD_RX_AACK_ON: if (status == TRX_STATUS_RXAACKON) { break; } if (status == TRX_STATUS_TRXOFF || status == TRX_STATUS_TXARETON) { at86rf23x_setregbits(dev->spi, RF23X_TRXCMD_STATE, TRX_CMD_RX_ON); (status == TRX_STATUS_TRXOFF) ? up_udelay(RF23X_TIME_TRXOFF_TO_PLL) : up_udelay(RF23X_TIME_TRANSITION_PLL_ACTIVE); } status = at86rf23x_getTRXstate(dev); if ((status == TRX_STATUS_RXON) || (status == TRX_STATUS_PLLON)) { at86rf23x_setregbits(dev->spi, RF23X_TRXCMD_STATE, TRX_CMD_RX_AACK_ON); up_udelay(RF23X_TIME_TRANSITION_PLL_ACTIVE); } status = at86rf23x_getregbits(dev->spi, RF23X_TRXSTATUS_STATUS); if (status != TRX_STATUS_RXAACKON) { ret = ERROR; } break; case TRX_STATUS_TXARETON: if (status == TRX_STATUS_TXARETON) { break; } if (status == TRX_STATUS_TRXOFF) { at86rf23x_setregbits(dev->spi, RF23X_TRXCMD_STATE, TRX_CMD_RX_ON); up_udelay(RF23X_TIME_TRXOFF_TO_PLL); } if ((status == TRX_STATUS_RXON) || (status == TRX_STATUS_PLLON)) { at86rf23x_setregbits(dev->spi, RF23X_TRXCMD_STATE, TRX_CMD_TX_ARET_ON); up_udelay(RF23X_TIME_TRANSITION_PLL_ACTIVE); } else if (status == TRX_STATUS_RXAACKON) { at86rf23x_setregbits(dev->spi, RF23X_TRXCMD_STATE, TRX_CMD_RX_ON); up_udelay(RF23X_TIME_TRANSITION_PLL_ACTIVE); at86rf23x_setregbits(dev->spi, RF23X_TRXCMD_STATE, TRX_CMD_TX_ARET_ON); up_udelay(RF23X_TIME_TRANSITION_PLL_ACTIVE); } status = at86rf23x_getregbits(dev->spi, RF23X_TRXSTATUS_STATUS); if (status != TRX_STATUS_TXARETON) { ret = ERROR; } break; case TRX_STATUS_SLEEP: at86rf23x_setregbits(dev->spi, RF23X_TRXCMD_STATE, TRX_CMD_FORCETRXOFF); up_udelay(RF23X_TIME_CMD_FORCE_TRX_OFF); dev->lower->slptr(dev->lower, true); up_udelay(RF23X_TIME_TRXOFF_TO_SLEEP); status = at86rf23x_getregbits(dev->spi, RF23X_TRXSTATUS_STATUS); break; default: wlerr("ERRPR: %s \n", EINVAL_STR); init_status = 0;/* Placed this here to keep compiler happy when not in debug */ return -EINVAL; } if (ret == ERROR) { wlerr("ERROR: State Transistion Error\n"); } wlinfo("Radio state change state[0x%02x]->state[0x%02x]\n", init_status, status); return ret; } /**************************************************************************** * Name: at86rf23x_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 at86rf23x_setchannel(FAR struct ieee802154_radio_s *ieee, uint8_t chan) { FAR struct at86rf23x_dev_s *dev = (FAR struct at86rf23x_dev_s *)ieee; uint8_t state; /* Validate if chan is a valid channel */ if (chan < 11 || chan > 26) { wlerr("ERROR: Invalid requested chan: %d\n",chan); return -EINVAL; } /* Validate we are in an acceptable mode to change the channel */ state = at86rf23x_getTRXstate(dev); if ((TRX_STATUS_SLEEP == state) || (TRX_STATUS_PON == state)) { wlerr("ERROR: Radio in invalid mode [%02x] to set the channel\n", state); return ERROR; } /* Set the Channel on the transceiver */ at86rf23x_setregbits(dev->spi, RF23X_CCA_BITS_CHANNEL, chan); /* Set the channel within local device */ dev->channel = chan; wlinfo("CHANNEL Changed to %d\n", chan); return OK; } /**************************************************************************** * Name: at86rf23x_getchannel * * 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 * * This section assumes that the transceiver is not in SLEEP or P_ON state. * * ****************************************************************************/ static int at86rf23x_getchannel(FAR struct ieee802154_radio_s *ieee, FAR uint8_t *chan) { FAR struct at86rf23x_dev_s *dev = (FAR struct at86rf23x_dev_s *)ieee; /* Set the Channel on the transceiver */ *chan = at86rf23x_getregbits(dev->spi, RF23X_CCA_BITS_CHANNEL); /* Set the channel within local device */ dev->channel = *chan; return OK; } /**************************************************************************** * Name: at86rf23x_setpanid * * Description: * Define the PAN ID for the network. * ****************************************************************************/ static int at86rf23x_setpanid(FAR struct ieee802154_radio_s *ieee, uint16_t panid) { FAR struct at86rf23x_dev_s *dev = (struct at86rf23x_dev_s *)ieee; uint8_t *pan = (uint8_t *)&panid; at86rf23x_setreg(dev->spi, RF23X_REG_PANID0, pan[0]); at86rf23x_setreg(dev->spi, RF23X_REG_PANID1, pan[1]); return OK; } /**************************************************************************** * Name: at86rf23x_getpanid * * Description: * Define the PAN ID for the network. * ****************************************************************************/ static int at86rf23x_getpanid(FAR struct ieee802154_radio_s *ieee, FAR uint16_t *panid) { FAR struct at86rf23x_dev_s *dev = (struct at86rf23x_dev_s *)ieee; uint8_t *pan = (uint8_t *)panid; /* TODO: Check if we need to pay attention to endianness */ pan[0] = at86rf23x_getreg(dev->spi, RF23X_REG_PANID0); pan[1] = at86rf23x_getreg(dev->spi, RF23X_REG_PANID1); return OK; } /**************************************************************************** * Name: at86rf23x_setsaddr * * Description: * Define the Short Address for the device. * ****************************************************************************/ static int at86rf23x_setsaddr(FAR struct ieee802154_radio_s *ieee, uint16_t saddr) { FAR struct at86rf23x_dev_s *dev = (struct at86rf23x_dev_s *)ieee; uint8_t *addr = (uint8_t *)&saddr; at86rf23x_setreg(dev->spi, RF23X_REG_SADDR0, addr[0]); at86rf23x_setreg(dev->spi, RF23X_REG_SADDR1, addr[1]); return OK; } /**************************************************************************** * Name: at86rf23x_getsaddr * * Description: * Get the short address of the device. * ****************************************************************************/ static int at86rf23x_getsaddr(FAR struct ieee802154_radio_s *ieee, FAR uint16_t *saddr) { FAR struct at86rf23x_dev_s *dev = (struct at86rf23x_dev_s *)ieee; uint8_t *addr = (uint8_t *)saddr; /* TODO: Check if we need to pay attention to endianness */ addr[0] = at86rf23x_getreg(dev->spi, RF23X_REG_SADDR0); addr[1] = at86rf23x_getreg(dev->spi, RF23X_REG_SADDR1); return OK; } /**************************************************************************** * Name: at86rf23x_seteaddr * * Description: * Set the IEEE address of the device. * ****************************************************************************/ static int at86rf23x_seteaddr(FAR struct ieee802154_radio_s *ieee, FAR uint8_t *eaddr) { FAR struct at86rf23x_dev_s *dev = (struct at86rf23x_dev_s *)ieee; /* TODO: Check if we need to pay attention to endianness */ at86rf23x_setreg(dev->spi, RF23X_REG_IEEEADDR0, eaddr[0]); at86rf23x_setreg(dev->spi, RF23X_REG_IEEEADDR1, eaddr[1]); at86rf23x_setreg(dev->spi, RF23X_REG_IEEEADDR2, eaddr[2]); at86rf23x_setreg(dev->spi, RF23X_REG_IEEEADDR3, eaddr[3]); at86rf23x_setreg(dev->spi, RF23X_REG_IEEEADDR4, eaddr[4]); at86rf23x_setreg(dev->spi, RF23X_REG_IEEEADDR5, eaddr[5]); at86rf23x_setreg(dev->spi, RF23X_REG_IEEEADDR6, eaddr[6]); at86rf23x_setreg(dev->spi, RF23X_REG_IEEEADDR7, eaddr[7]); return OK; } /**************************************************************************** * Name: at86rf23x_geteaddr * * Description: * Get the IEEE address of the device. * ****************************************************************************/ static int at86rf23x_geteaddr(FAR struct ieee802154_radio_s *ieee, FAR uint8_t *eaddr) { FAR struct at86rf23x_dev_s *dev = (struct at86rf23x_dev_s *)ieee; /* TODO: Check if we need to pay attention to endianness */ eaddr[0] = at86rf23x_getreg(dev->spi, RF23X_REG_IEEEADDR0); eaddr[1] = at86rf23x_getreg(dev->spi, RF23X_REG_IEEEADDR1); eaddr[2] = at86rf23x_getreg(dev->spi, RF23X_REG_IEEEADDR2); eaddr[3] = at86rf23x_getreg(dev->spi, RF23X_REG_IEEEADDR3); eaddr[4] = at86rf23x_getreg(dev->spi, RF23X_REG_IEEEADDR4); eaddr[5] = at86rf23x_getreg(dev->spi, RF23X_REG_IEEEADDR5); eaddr[6] = at86rf23x_getreg(dev->spi, RF23X_REG_IEEEADDR6); eaddr[7] = at86rf23x_getreg(dev->spi, RF23X_REG_IEEEADDR7); return OK; } /**************************************************************************** * Name: at86rf23x_setpromisc * * Description: * enable/disable promiscuous mode. * ****************************************************************************/ static int at86rf23x_setpromisc(FAR struct ieee802154_radio_s *ieee, bool promisc) { FAR struct at86rf23x_dev_s *dev = (struct at86rf23x_dev_s *)ieee; /* TODO: Check what mode I should be in to activate promiscuous mode: * This is way to simple of an implementation. Many other things should be set * and/or checked before we set the device into promiscuous mode */ at86rf23x_setregbits(dev->spi, RF23X_XAHCTRL1_BITS_PROM_MODE, promisc); return OK; } /**************************************************************************** * Name: at86rf23x_getpromisc * * Description: * Check if the device is in promiscuous mode. * ****************************************************************************/ static int at86rf23x_getpromisc(FAR struct ieee802154_radio_s *ieee, FAR bool *promisc) { FAR struct at86rf23x_dev_s *dev = (struct at86rf23x_dev_s *)ieee; *promisc = at86rf23x_getregbits(dev->spi, RF23X_XAHCTRL1_BITS_PROM_MODE); return OK; } /**************************************************************************** * Name: at86rf23x_setdevmode * * Description: * Check if the device is in promiscuous mode. * ****************************************************************************/ static int at86rf23x_setdevmode(FAR struct ieee802154_radio_s *ieee, uint8_t mode) { FAR struct at86rf23x_dev_s *dev = (struct at86rf23x_dev_s *)ieee; /* Define dev mode */ if (mode == IEEE802154_MODE_PANCOORD) { at86rf23x_setregbits(dev->spi, RF23X_CSMASEED1_IAMCOORD_BITS, 0x01); } else if (mode == IEEE802154_MODE_COORD) { /* ????? */ } else if (mode == IEEE802154_MODE_DEVICE) { at86rf23x_setregbits(dev->spi, RF23X_CSMASEED1_IAMCOORD_BITS, 0x00); } else { return -EINVAL; } dev->devmode = mode; return OK; } /**************************************************************************** * Name: at86rf23x_getdevmode * * Description: * get the device mode type of the radio. * ****************************************************************************/ static int at86rf23x_getdevmode(FAR struct ieee802154_radio_s *ieee, FAR uint8_t *mode) { FAR struct at86rf23x_dev_s *dev = (struct at86rf23x_dev_s *)ieee; int val; val = at86rf23x_getregbits(dev->spi, RF23X_CSMASEED1_IAMCOORD_BITS); if (val == 1) { *mode = IEEE802154_MODE_PANCOORD; } else { *mode = IEEE802154_MODE_DEVICE; } return OK; } /**************************************************************************** * Name: at86rf23x_settxpower * * Description: * set the tx power attenuation or amplification * ****************************************************************************/ static int at86rf23x_settxpower(FAR struct ieee802154_radio_s *ieee, int32_t txpwr) { FAR struct at86rf23x_dev_s *dev = (struct at86rf23x_dev_s *)ieee; /* TODO: this needs alot of work to make sure all chips can share this function */ /* Right now we only set tx power to 0 */ at86rf23x_setreg(dev->spi, RF23X_REG_TXPWR, RF23X_TXPWR_0); return OK; } /**************************************************************************** * Name: at86rf23x_gettxpower * * Description: * get the tx power attenuation or amplification. * ****************************************************************************/ static int at86rf23x_gettxpower(FAR struct ieee802154_radio_s *ieee, FAR int32_t *txpwr) { FAR struct at86rf23x_dev_s *dev = (struct at86rf23x_dev_s *)ieee; uint8_t reg; /* TODO: this needs alot of work to make sure all chips can share this * function. */ /* Right now we only get negative values */ reg = at86rf23x_getreg(dev->spi, RF23X_REG_TXPWR); switch (reg) { case RF23X_TXPWR_POS_4: *txpwr = 0; break; case RF23X_TXPWR_POS_3_7: *txpwr =0; break; case RF23X_TXPWR_POS_3_4: *txpwr = 0; break; case RF23X_TXPWR_POS_3: *txpwr = 0; break; case RF23X_TXPWR_POS_2_5: *txpwr = 0; break; case RF23X_TXPWR_POS_2: *txpwr = 0; break; case RF23X_TXPWR_POS_1: *txpwr = 0; break; case RF23X_TXPWR_0: *txpwr =0; break; case RF23X_TXPWR_NEG_1: *txpwr = 1000; break; case RF23X_TXPWR_NEG_2: *txpwr = 2000; break; case RF23X_TXPWR_NEG_3: *txpwr = 3000; break; case RF23X_TXPWR_NEG_4: *txpwr = 4000; break; case RF23X_TXPWR_NEG_6: *txpwr = 6000; break; case RF23X_TXPWR_NEG_8: *txpwr = 8000; break; case RF23X_TXPWR_NEG_12: *txpwr = 12000; break; case RF23X_TXPWR_NEG_17: *txpwr = 17000; break; } return OK; } /**************************************************************************** * Name: at86rf23x_setcca * * Description: * Configures if energy detection is used or carrier sense. The base * measurement is configured here as well * ****************************************************************************/ static int at86rf23x_setcca(FAR struct ieee802154_radio_s *ieee, FAR struct ieee802154_cca_s *cca) { FAR struct at86rf23x_dev_s *dev = (struct at86rf23x_dev_s *)ieee; /* TODO: This doesn't fit the RF233 completely come back to this */ if (!cca->use_ed && !cca->use_cs) { return -EINVAL; } if (cca->use_cs && cca->csth > 0x0f) { return -EINVAL; } if (cca->use_ed) { at86rf23x_setregbits(dev->spi, RF23X_CCA_BITS_MODE, RF23X_CCA_MODE_ED); } if (cca->use_cs) { at86rf23x_setregbits(dev->spi, RF23X_CCA_BITS_MODE, RF23X_CCA_MODE_CS); } memcpy(&dev->cca, cca, sizeof(struct ieee802154_cca_s)); return OK; } /**************************************************************************** * Name: at86rf23x_getcca * * Description: * Get CCA for ???: TODO: need to implement * ****************************************************************************/ static int at86rf23x_getcca(FAR struct ieee802154_radio_s *ieee, FAR struct ieee802154_cca_s *cca) { FAR struct at86rf23x_dev_s *dev = (struct at86rf23x_dev_s *)ieee; #warning at86rf23x_getcca not implemented. UNUSED(dev); UNUSED(cca); return ERROR; } /**************************************************************************** * Name: at86rf23x_energydetect * * Description: * Perform energy detection scan. TODO: Need to implement. * ****************************************************************************/ static int at86rf23x_energydetect(FAR struct ieee802154_radio_s *ieee, FAR uint8_t *energy) { #warning at86rf23x_energydetect not implemented. /* Not yet implemented */ return ERROR; } /**************************************************************************** * Name: at86rf23x_initialize * * Description: * Initialize the radio. * ****************************************************************************/ int at86rf23x_initialize(FAR struct at86rf23x_dev_s *dev) { uint8_t part; uint8_t version; at86rf23x_resetrf(dev); part = at86rf23x_getreg(dev->spi, RF23X_REG_PART); version = at86rf23x_getreg(dev->spi, RF23X_REG_VERSION); wlinfo("Radio part: 0x%02x version: 0x%02x found\n", part, version); return OK; } /**************************************************************************** * Name: at86rf23x_resetrf * * Description: * Hard Reset of the radio. The reset also brings the radio into the * TRX_OFF state. * ****************************************************************************/ static int at86rf23x_resetrf(FAR struct at86rf23x_dev_s *dev) { FAR const struct at86rf23x_lower_s *lower = dev->lower; uint8_t trx_status, retry_cnt = 0; /* Reset the radio */ lower->reset(lower, false); lower->slptr(lower, false); up_udelay(RF23X_TIME_RESET); lower->reset(lower, true); /* Dummy read of IRQ register */ at86rf23x_getreg(dev->spi, RF23X_REG_IRQ_STATUS); do { trx_status = at86rf23x_setTRXstate(dev, TRX_CMD_TRXOFF, true); if (retry_cnt == RF23X_MAX_RETRY_RESET_TO_TRX_OFF) { wlerr("ERROR: Reset of transceiver failed\n"); return ERROR; } retry_cnt++; } while (trx_status != OK); return OK; } /**************************************************************************** * Name: at86rf23x_rxenable * * Description: * puts the radio into RX mode and brings in the buffer to handle * RX messages. * ****************************************************************************/ static int at86rf23x_rxenable(FAR struct ieee802154_radio_s *ieee, bool state, FAR struct ieee802154_packet_s *packet) { FAR struct at86rf23x_dev_s *dev = (FAR struct at86rf23x_dev_s *)ieee; /* Set the radio to the receive state */ return at86rf23x_setTRXstate(dev, TRX_CMD_RX_ON, false); /* Enable the RX IRQ */ /* TODO: * I am not sure what to do here since the at86rf23x shares the * irq with the tx finished. Better planning needs to be done on * my end. */ /* Set buffer to receive next packet */ ieee->rxbuf = packet; } /**************************************************************************** * Name: at86rf23x_interrupt * * Description: * Actual interrupt handler ran inside privileged space. * ****************************************************************************/ static int at86rf23x_interrupt(int irq, FAR void *context, FAR void *arg) { FAR struct at86rf23x_dev_s *dev = (FAR struct at86rf23x_dev_s *)arg; DEBUGASSERT(dev != NULL); /* 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, at86rf23x_irqworker, (FAR void *)dev, 0); } /**************************************************************************** * Name: at86rf23x_regdump * * Description: * Dumps all the RF23X radios registers from 00 - 2F there are a few other * registers that don't get dumped but just fore the ease of code I left * them out. * ****************************************************************************/ static int at86rf23x_regdump(FAR struct at86rf23x_dev_s *dev) { uint32_t i; char buf[4 + 16 * 3 + 2 + 1]; int len=0; wlinfo("RF23X regs:\n"); for (i = 0; i < 0x30; i++) { /* First row and every 15 regs */ if ((i & 0x0f) == 0) { len = sprintf(buf, "%02x: ", i & 0xFF); } /* Print the register value */ len += sprintf(buf+len, "%02x ", at86rf23x_getreg(dev->spi, i)); /* At the end of each 15 regs or end of rf233s regs and actually print * debug message. */ if ((i & 15) == 15 || i == 0x2f) { sprintf(buf + len, "\n"); wlinfo("%s" ,buf);q } } /* TODO: I have a few more regs that are not consecutive. Will print later */ return 0; } /**************************************************************************** * Name: at86rf23x_irqworker * * Description: * Actual thread to handle the irq outside of privaleged mode. * ****************************************************************************/ static void at86rf23x_irqworker(FAR void *arg) { FAR struct at86rf23x_dev_s *dev = (FAR struct at86rf23x_dev_s *)arg; uint8_t irq_status = at86rf23x_getreg(dev->spi, RF23X_REG_IRQ_STATUS); wlinfo("IRQ: 0x%02X\n", irq_status); if ((irq_status & (1<<3)) != 0) { if ((irq_status & (1<<2)) != 0) { at86rf23x_irqwork_rx(dev); } else { at86rf23x_irqwork_tx(dev); } } else { wlerr("ERROR: Unknown IRQ Status: %d\n", irq_status); /* Re-enable the IRQ even if we don't know how to handle previous * status. */ dev->lower->enable(dev->lower, true); } } /**************************************************************************** * Name: at86rf23x_irqwork_rx * * Description: * Misc/unofficial device controls. * ****************************************************************************/ static void at86rf23x_irqwork_rx(FAR struct at86rf23x_dev_s *dev) { uint8_t rx_len; wlinfo("6LOWPAN:Rx IRQ\n"); rx_len = at86rf23x_readframe(dev->spi, dev->ieee.rxbuf->data); dev->ieee.rxbuf->len = rx_len; dev->ieee.rxbuf->lqi = 0; dev->ieee.rxbuf->rssi = 0; nxsem_post(&dev->ieee.rxsem); /* TODO: * Not to sure yet what I should do here. I will something * soon. */ /* Re-enable the IRQ */ dev->lower->enable(dev->lower, true); } /**************************************************************************** * Name: at86rf23x_irqwork_tx * * Description: * Misc/unofficial device controls. * ****************************************************************************/ static void at86rf23x_irqwork_tx(FAR struct at86rf23x_dev_s *dev) { wlinfo("6LOWPAN:Tx IRQ\n"); /* TODO: * There needs to be more here but for now just alert the waiting * thread. Maybe put it back into Rx mode */ /* Re enable the IRQ */ dev->lower->enable(dev->lower, true); nxsem_post(&dev->ieee.txsem); } /**************************************************************************** * Name: at86rf23x_transmit * * Description: * transmission the packet. Send the packet to the radio and initiate the * transmit process. Then block the function till we have a successful * transmission * ****************************************************************************/ static int at86rf23x_transmit(FAR struct ieee802154_radio_s *ieee, FAR struct ieee802154_packet_s *packet) { FAR struct at86rf23x_dev_s *dev = (FAR struct at86rf23x_dev_s *)ieee; /* TODO: * A plan needs to be made on when we declare the transmission successful. * 1. If the packet is sent * 2. If we receive an ACK. * 3. Where do we control the retry process? */ if (at86rf23x_setTRXstate(dev, TRX_CMD_PLL_ON, false)) { at86rf23x_writeframe(dev->spi, packet->data, packet->len); } else { wlerr("ERROR: Transmit could not put the radio in a Tx state\n"); return ERROR; } /* Put the thread that requested transfer to a waiting state */ nxsem_wait(&dev->ieee.txsem); /* TODO Verify that I want to stay in the PLL state or if I want to roll * back to RX_ON. */ return OK; } /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: at86rf23x_init * * Description: * Return an at86rf23x device for use by other drivers. * ****************************************************************************/ FAR struct ieee802154_radio_s *at86rf23x_init(FAR struct spi_dev_s *spi, FAR const struct at86rf23x_lower_s *lower) { FAR struct at86rf23x_dev_s *dev; struct ieee802154_cca_s cca; dev = &g_at86rf23x_devices[0]; /* Attach the interface, lower driver, and devops */ dev->spi = spi; dev->lower = lower; dev->ieee.ops = &at86rf23x_devops; /* Attach irq */ if (lower->attach(lower, at86rf23x_interrupt, dev) != OK) { return NULL; } nxsem_init(&dev->ieee.rxsem, 0, 0); nxsem_init(&dev->ieee.txsem, 0, 0); /* Initialize device */ at86rf23x_initialize(dev); /* Configure the desired IRQs of the devices */ at86rf23x_setreg(dev->spi, RF23X_REG_IRQ_MASK, RF23X_IRQ_MASK_DEFAULT); /* Turn the PLL to the on state */ at86rf23x_setTRXstate(dev, TRX_CMD_PLL_ON, false); /* SEED value of the CSMA backoff algorithm. */ #ifdef RF23X_ANTENNA_DIVERSITY /* Use antenna diversity */ trx_bit_write(SR_ANT_CTRL, ANTENNA_DEFAULT); trx_bit_write(SR_PDT_THRES, THRES_ANT_DIV_ENABLE); trx_bit_write(SR_ANT_DIV_EN, ANT_DIV_ENABLE); trx_bit_write(SR_ANT_EXT_SW_EN, ANT_EXT_SW_ENABLE); #endif #ifdef RF23X_TIMESTAMP /* Enable timestamp init code goes here */ #endif #ifdef RF23X_RF_FRONTEND_CTRL /* Init front end control code goes here */ #endif /* Set the channel of the radio */ at86rf23x_setchannel(&dev->ieee, 12); /* Configure the Pan id */ //at86rf23x_setpanid(&dev->ieee, IEEE802154_PAN_DEFAULT); /* Configure the Short Addr */ //at86rf23x_setsaddr(&dev->ieee, IEEE802154_SADDR_UNSPEC); /* Configure the IEEE Addr */ //at86rf23x_seteaddr(&dev->ieee, IEEE802154_EADDR_UNSPEC); /* Default device params at86rf23x defaults to energy detect only */ cca.use_ed = 1; cca.use_cs = 0; cca.edth = 0x60; /* CCA mode ED, no carrier sense, recommenced ED * threshold -69 dBm */ at86rf23x_setcca(&dev->ieee, &cca); /* Put the Device to RX ON Mode */ //at86rf23x_setTRXstate(dev, TRX_CMD_RX_ON, false); /* Enable Radio IRQ */ lower->enable(lower, true); return &dev->ieee; }