640 lines
16 KiB
C
640 lines
16 KiB
C
/*
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* Copyright (c) 2019 Manivannan Sadhasivam
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* Copyright (c) 2020 Grinn
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/drivers/gpio.h>
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#include <zephyr/drivers/lora.h>
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#include <zephyr/drivers/spi.h>
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#include <zephyr/zephyr.h>
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#include "sx12xx_common.h"
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#include <zephyr/logging/log.h>
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LOG_MODULE_REGISTER(sx127x, CONFIG_LORA_LOG_LEVEL);
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#if DT_HAS_COMPAT_STATUS_OKAY(semtech_sx1272)
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#include <sx1272/sx1272.h>
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#define DT_DRV_COMPAT semtech_sx1272
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#define SX127xCheckRfFrequency SX1272CheckRfFrequency
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#define SX127xGetBoardTcxoWakeupTime SX1272GetBoardTcxoWakeupTime
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#define SX127xSetAntSwLowPower SX1272SetAntSwLowPower
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#define SX127xSetBoardTcxo SX1272SetBoardTcxo
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#define SX127xSetAntSw SX1272SetAntSw
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#define SX127xReset SX1272Reset
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#define SX127xIoIrqInit SX1272IoIrqInit
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#define SX127xWriteBuffer SX1272WriteBuffer
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#define SX127xReadBuffer SX1272ReadBuffer
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#define SX127xSetRfTxPower SX1272SetRfTxPower
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#define SX127xGetDio1PinState SX1272GetDio1PinState
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#define SX127xInit SX1272Init
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#define SX127xGetStatus SX1272GetStatus
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#define SX127xSetModem SX1272SetModem
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#define SX127xSetChannel SX1272SetChannel
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#define SX127xIsChannelFree SX1272IsChannelFree
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#define SX127xRandom SX1272Random
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#define SX127xSetRxConfig SX1272SetRxConfig
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#define SX127xSetTxConfig SX1272SetTxConfig
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#define SX127xGetTimeOnAir SX1272GetTimeOnAir
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#define SX127xSend SX1272Send
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#define SX127xSetSleep SX1272SetSleep
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#define SX127xSetStby SX1272SetStby
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#define SX127xSetRx SX1272SetRx
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#define SX127xWrite SX1272Write
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#define SX127xRead SX1272Read
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#define SX127xSetMaxPayloadLength SX1272SetMaxPayloadLength
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#define SX127xSetPublicNetwork SX1272SetPublicNetwork
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#define SX127xGetWakeupTime SX1272GetWakeupTime
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#define SX127xSetTxContinuousWave SX1272SetTxContinuousWave
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#elif DT_HAS_COMPAT_STATUS_OKAY(semtech_sx1276)
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#include <sx1276/sx1276.h>
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#define DT_DRV_COMPAT semtech_sx1276
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#define SX127xCheckRfFrequency SX1276CheckRfFrequency
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#define SX127xGetBoardTcxoWakeupTime SX1276GetBoardTcxoWakeupTime
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#define SX127xSetAntSwLowPower SX1276SetAntSwLowPower
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#define SX127xSetBoardTcxo SX1276SetBoardTcxo
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#define SX127xSetAntSw SX1276SetAntSw
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#define SX127xReset SX1276Reset
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#define SX127xIoIrqInit SX1276IoIrqInit
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#define SX127xWriteBuffer SX1276WriteBuffer
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#define SX127xReadBuffer SX1276ReadBuffer
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#define SX127xSetRfTxPower SX1276SetRfTxPower
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#define SX127xGetDio1PinState SX1276GetDio1PinState
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#define SX127xInit SX1276Init
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#define SX127xGetStatus SX1276GetStatus
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#define SX127xSetModem SX1276SetModem
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#define SX127xSetChannel SX1276SetChannel
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#define SX127xIsChannelFree SX1276IsChannelFree
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#define SX127xRandom SX1276Random
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#define SX127xSetRxConfig SX1276SetRxConfig
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#define SX127xSetTxConfig SX1276SetTxConfig
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#define SX127xGetTimeOnAir SX1276GetTimeOnAir
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#define SX127xSend SX1276Send
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#define SX127xSetSleep SX1276SetSleep
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#define SX127xSetStby SX1276SetStby
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#define SX127xSetRx SX1276SetRx
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#define SX127xWrite SX1276Write
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#define SX127xRead SX1276Read
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#define SX127xSetMaxPayloadLength SX1276SetMaxPayloadLength
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#define SX127xSetPublicNetwork SX1276SetPublicNetwork
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#define SX127xGetWakeupTime SX1276GetWakeupTime
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#define SX127xSetTxContinuousWave SX1276SetTxContinuousWave
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#else
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#error No SX127x instance in device tree.
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#endif
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BUILD_ASSERT(DT_NUM_INST_STATUS_OKAY(semtech_sx1272) +
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DT_NUM_INST_STATUS_OKAY(semtech_sx1276) <= 1,
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"Multiple SX127x instances in DT");
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#if DT_INST_NODE_HAS_PROP(0, tcxo_power_startup_delay_ms)
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#define TCXO_POWER_STARTUP_DELAY_MS \
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DT_INST_PROP(0, tcxo_power_startup_delay_ms)
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#else
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#define TCXO_POWER_STARTUP_DELAY_MS 0
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#endif
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/*
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* Those macros must be in sync with 'power-amplifier-output' dts property.
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*/
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#define SX127X_PA_RFO 0
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#define SX127X_PA_BOOST 1
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#if DT_INST_NODE_HAS_PROP(0, rfo_enable_gpios) && \
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DT_INST_NODE_HAS_PROP(0, pa_boost_enable_gpios)
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#define SX127X_PA_OUTPUT(power) \
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((power) > 14 ? SX127X_PA_BOOST : SX127X_PA_RFO)
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#elif DT_INST_NODE_HAS_PROP(0, rfo_enable_gpios)
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#define SX127X_PA_OUTPUT(power) SX127X_PA_RFO
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#elif DT_INST_NODE_HAS_PROP(0, pa_boost_enable_gpios)
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#define SX127X_PA_OUTPUT(power) SX127X_PA_BOOST
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#elif DT_INST_NODE_HAS_PROP(0, power_amplifier_output)
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#define SX127X_PA_OUTPUT(power) \
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DT_INST_ENUM_IDX(0, power_amplifier_output)
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#else
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BUILD_ASSERT(0, "None of rfo-enable-gpios, pa-boost-enable-gpios and "
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"power-amplifier-output has been specified. "
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"Look at semtech,sx127x-base.yaml to fix that.");
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#endif
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#define SX127X_PADAC_20DBM_ON (RF_PADAC_20DBM_ON)
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#define SX127X_PADAC_20DBM_OFF (RF_PADAC_20DBM_OFF)
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#define SX127X_PADAC_20DBM_MASK (~RF_PADAC_20DBM_MASK)
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#define SX127X_PACONFIG_PASELECT_PABOOST (RF_PACONFIG_PASELECT_PABOOST)
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#define SX127X_PACONFIG_OUTPUTPOWER_MASK (~RF_PACONFIG_OUTPUTPOWER_MASK)
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#ifdef RF_PACONFIG_MAX_POWER_MASK
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#define SX127X_PACONFIG_MAX_POWER_SHIFT 4
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#endif
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extern DioIrqHandler *DioIrq[];
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/* Helper macro that UTIL_LISTIFY can use and produces an element with comma */
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#define SX127X_DIO_GPIO_LEN(inst) \
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DT_INST_PROP_LEN(inst, dio_gpios)
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#define SX127X_DIO_GPIO_ELEM(idx, inst) \
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GPIO_DT_SPEC_INST_GET_BY_IDX(inst, dio_gpios, idx)
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#define SX127X_DIO_GPIO_INIT(n) \
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LISTIFY(SX127X_DIO_GPIO_LEN(n), SX127X_DIO_GPIO_ELEM, (,), n)
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static const struct gpio_dt_spec sx127x_dios[] = { SX127X_DIO_GPIO_INIT(0) };
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#define SX127X_MAX_DIO ARRAY_SIZE(sx127x_dios)
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struct sx127x_config {
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struct spi_dt_spec bus;
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struct gpio_dt_spec reset;
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#if DT_INST_NODE_HAS_PROP(0, antenna_enable_gpios)
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struct gpio_dt_spec antenna_enable;
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#endif
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#if DT_INST_NODE_HAS_PROP(0, rfi_enable_gpios)
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struct gpio_dt_spec rfi_enable;
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#endif
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#if DT_INST_NODE_HAS_PROP(0, rfo_enable_gpios)
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struct gpio_dt_spec rfo_enable;
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#endif
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#if DT_INST_NODE_HAS_PROP(0, pa_boost_enable_gpios)
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struct gpio_dt_spec pa_boost_enable;
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#endif
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#if DT_INST_NODE_HAS_PROP(0, tcxo_power_gpios)
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struct gpio_dt_spec tcxo_power;
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#endif
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};
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static const struct sx127x_config dev_config = {
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.bus = SPI_DT_SPEC_INST_GET(0, SPI_WORD_SET(8) | SPI_TRANSFER_MSB, 0),
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.reset = GPIO_DT_SPEC_INST_GET(0, reset_gpios),
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#if DT_INST_NODE_HAS_PROP(0, antenna_enable_gpios)
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.antenna_enable = GPIO_DT_SPEC_INST_GET(0, antenna_enable_gpios),
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#endif
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#if DT_INST_NODE_HAS_PROP(0, rfi_enable_gpios)
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.rfi_enable = GPIO_DT_SPEC_INST_GET(0, rfi_enable_gpios),
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#endif
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#if DT_INST_NODE_HAS_PROP(0, rfo_enable_gpios)
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.rfo_enable = GPIO_DT_SPEC_INST_GET(0, rfo_enable_gpios),
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#endif
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#if DT_INST_NODE_HAS_PROP(0, pa_boost_enable_gpios)
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.pa_boost_enable = GPIO_DT_SPEC_INST_GET(0, pa_boost_enable_gpios),
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#endif
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#if DT_INST_NODE_HAS_PROP(0, tcxo_power_gpios)
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.tcxo_power = GPIO_DT_SPEC_INST_GET(0, tcxo_power_gpios),
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#endif
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};
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static struct sx127x_data {
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#if DT_INST_NODE_HAS_PROP(0, rfo_enable_gpios) && \
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DT_INST_NODE_HAS_PROP(0, pa_boost_enable_gpios)
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uint8_t tx_power;
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#endif
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#if DT_INST_NODE_HAS_PROP(0, tcxo_power_gpios)
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bool tcxo_power_enabled;
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#endif
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struct k_work dio_work[SX127X_MAX_DIO];
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} dev_data;
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static int8_t clamp_int8(int8_t x, int8_t min, int8_t max)
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{
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if (x < min) {
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return min;
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} else if (x > max) {
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return max;
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} else {
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return x;
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}
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}
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bool SX127xCheckRfFrequency(uint32_t frequency)
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{
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/* TODO */
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return true;
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}
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uint32_t SX127xGetBoardTcxoWakeupTime(void)
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{
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return TCXO_POWER_STARTUP_DELAY_MS;
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}
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static inline void sx127x_antenna_enable(int val)
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{
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#if DT_INST_NODE_HAS_PROP(0, antenna_enable_gpios)
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gpio_pin_set_dt(&dev_config.antenna_enable, val);
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#endif
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}
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static inline void sx127x_rfi_enable(int val)
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{
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#if DT_INST_NODE_HAS_PROP(0, rfi_enable_gpios)
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gpio_pin_set_dt(&dev_config.rfi_enable, val);
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#endif
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}
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static inline void sx127x_rfo_enable(int val)
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{
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#if DT_INST_NODE_HAS_PROP(0, rfo_enable_gpios)
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gpio_pin_set_dt(&dev_config.rfo_enable, val);
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#endif
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}
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static inline void sx127x_pa_boost_enable(int val)
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{
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#if DT_INST_NODE_HAS_PROP(0, pa_boost_enable_gpios)
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gpio_pin_set_dt(&dev_config.pa_boost_enable, val);
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#endif
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}
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void SX127xSetAntSwLowPower(bool low_power)
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{
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if (low_power) {
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/* force inactive (low power) state of all antenna paths */
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sx127x_rfi_enable(0);
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sx127x_rfo_enable(0);
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sx127x_pa_boost_enable(0);
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sx127x_antenna_enable(0);
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} else {
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sx127x_antenna_enable(1);
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/* rely on SX127xSetAntSw() to configure proper antenna path */
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}
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}
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void SX127xSetBoardTcxo(uint8_t state)
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{
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#if DT_INST_NODE_HAS_PROP(0, tcxo_power_gpios)
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bool enable = state;
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if (enable == dev_data.tcxo_power_enabled) {
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return;
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}
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if (enable) {
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gpio_pin_set_dt(&dev_config.tcxo_power, 1);
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if (TCXO_POWER_STARTUP_DELAY_MS > 0) {
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k_sleep(K_MSEC(TCXO_POWER_STARTUP_DELAY_MS));
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}
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} else {
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gpio_pin_set_dt(&dev_config.tcxo_power, 0);
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}
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dev_data.tcxo_power_enabled = enable;
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#endif
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}
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void SX127xSetAntSw(uint8_t opMode)
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{
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switch (opMode) {
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case RFLR_OPMODE_TRANSMITTER:
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sx127x_rfi_enable(0);
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if (SX127X_PA_OUTPUT(dev_data.tx_power) == SX127X_PA_BOOST) {
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sx127x_rfo_enable(0);
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sx127x_pa_boost_enable(1);
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} else {
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sx127x_pa_boost_enable(0);
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sx127x_rfo_enable(1);
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}
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break;
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default:
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sx127x_rfo_enable(0);
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sx127x_pa_boost_enable(0);
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sx127x_rfi_enable(1);
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break;
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}
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}
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void SX127xReset(void)
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{
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SX127xSetBoardTcxo(true);
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gpio_pin_set_dt(&dev_config.reset, 1);
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k_sleep(K_MSEC(1));
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gpio_pin_set_dt(&dev_config.reset, 0);
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k_sleep(K_MSEC(6));
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}
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static void sx127x_dio_work_handle(struct k_work *work)
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{
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int dio = work - dev_data.dio_work;
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(*DioIrq[dio])(NULL);
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}
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static void sx127x_irq_callback(const struct device *dev,
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struct gpio_callback *cb, uint32_t pins)
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{
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unsigned int i, pin;
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pin = find_lsb_set(pins) - 1;
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for (i = 0; i < SX127X_MAX_DIO; i++) {
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if (dev == sx127x_dios[i].port &&
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pin == sx127x_dios[i].pin) {
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k_work_submit(&dev_data.dio_work[i]);
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}
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}
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}
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void SX127xIoIrqInit(DioIrqHandler **irqHandlers)
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{
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unsigned int i;
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static struct gpio_callback callbacks[SX127X_MAX_DIO];
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/* Setup DIO gpios */
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for (i = 0; i < SX127X_MAX_DIO; i++) {
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if (!irqHandlers[i]) {
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continue;
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}
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if (!device_is_ready(sx127x_dios[i].port)) {
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LOG_ERR("GPIO port %s not ready",
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sx127x_dios[i].port->name);
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return;
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}
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k_work_init(&dev_data.dio_work[i], sx127x_dio_work_handle);
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gpio_pin_configure_dt(&sx127x_dios[i], GPIO_INPUT);
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gpio_init_callback(&callbacks[i],
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sx127x_irq_callback,
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BIT(sx127x_dios[i].pin));
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if (gpio_add_callback(sx127x_dios[i].port, &callbacks[i]) < 0) {
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LOG_ERR("Could not set gpio callback.");
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return;
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}
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gpio_pin_interrupt_configure_dt(&sx127x_dios[i],
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GPIO_INT_EDGE_TO_ACTIVE);
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}
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}
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static int sx127x_transceive(uint8_t reg, bool write, void *data, size_t length)
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{
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const struct spi_buf buf[2] = {
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{
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.buf = ®,
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.len = sizeof(reg)
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},
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{
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.buf = data,
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.len = length
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}
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};
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struct spi_buf_set tx = {
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.buffers = buf,
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.count = ARRAY_SIZE(buf),
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};
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if (!write) {
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const struct spi_buf_set rx = {
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.buffers = buf,
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.count = ARRAY_SIZE(buf)
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};
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return spi_transceive_dt(&dev_config.bus, &tx, &rx);
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}
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return spi_write_dt(&dev_config.bus, &tx);
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}
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int sx127x_read(uint8_t reg_addr, uint8_t *data, uint8_t len)
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{
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return sx127x_transceive(reg_addr, false, data, len);
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}
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int sx127x_write(uint8_t reg_addr, uint8_t *data, uint8_t len)
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{
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return sx127x_transceive(reg_addr | BIT(7), true, data, len);
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}
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void SX127xWriteBuffer(uint32_t addr, uint8_t *buffer, uint8_t size)
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{
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int ret;
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ret = sx127x_write(addr, buffer, size);
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if (ret < 0) {
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LOG_ERR("Unable to write address: 0x%x", addr);
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}
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}
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void SX127xReadBuffer(uint32_t addr, uint8_t *buffer, uint8_t size)
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{
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int ret;
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ret = sx127x_read(addr, buffer, size);
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if (ret < 0) {
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LOG_ERR("Unable to read address: 0x%x", addr);
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}
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}
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void SX127xSetRfTxPower(int8_t power)
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{
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int ret;
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uint8_t pa_config = 0;
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uint8_t pa_dac = 0;
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ret = sx127x_read(REG_PADAC, &pa_dac, 1);
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if (ret < 0) {
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LOG_ERR("Unable to read PA dac");
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return;
|
|
}
|
|
|
|
pa_dac &= ~SX127X_PADAC_20DBM_MASK;
|
|
|
|
if (SX127X_PA_OUTPUT(power) == SX127X_PA_BOOST) {
|
|
power = clamp_int8(power, 2, 20);
|
|
|
|
pa_config |= SX127X_PACONFIG_PASELECT_PABOOST;
|
|
if (power > 17) {
|
|
pa_dac |= SX127X_PADAC_20DBM_ON;
|
|
pa_config |= (power - 5) & SX127X_PACONFIG_OUTPUTPOWER_MASK;
|
|
} else {
|
|
pa_dac |= SX127X_PADAC_20DBM_OFF;
|
|
pa_config |= (power - 2) & SX127X_PACONFIG_OUTPUTPOWER_MASK;
|
|
}
|
|
} else {
|
|
#ifdef SX127X_PACONFIG_MAX_POWER_SHIFT
|
|
power = clamp_int8(power, -4, 15);
|
|
|
|
pa_dac |= SX127X_PADAC_20DBM_OFF;
|
|
if (power > 0) {
|
|
/* Set the power range to 0 -- 10.8+0.6*7 dBm */
|
|
pa_config |= 7 << SX127X_PACONFIG_MAX_POWER_SHIFT;
|
|
pa_config |= power & SX127X_PACONFIG_OUTPUTPOWER_MASK;
|
|
} else {
|
|
/* Set the power range to -4.2 -- 10.8+0.6*0 dBm */
|
|
pa_config |= (power + 4) & SX127X_PACONFIG_OUTPUTPOWER_MASK;
|
|
}
|
|
#else
|
|
power = clamp_int8(power, -1, 14);
|
|
|
|
pa_dac |= SX127X_PADAC_20DBM_OFF;
|
|
pa_config |= (power + 1) & SX127X_PACONFIG_OUTPUTPOWER_MASK;
|
|
#endif
|
|
}
|
|
|
|
#if DT_INST_NODE_HAS_PROP(0, rfo_enable_gpios) && \
|
|
DT_INST_NODE_HAS_PROP(0, pa_boost_enable_gpios)
|
|
dev_data.tx_power = power;
|
|
#endif
|
|
|
|
ret = sx127x_write(REG_PACONFIG, &pa_config, 1);
|
|
if (ret < 0) {
|
|
LOG_ERR("Unable to write PA config");
|
|
return;
|
|
}
|
|
|
|
ret = sx127x_write(REG_PADAC, &pa_dac, 1);
|
|
if (ret < 0) {
|
|
LOG_ERR("Unable to write PA dac");
|
|
return;
|
|
}
|
|
}
|
|
|
|
uint32_t SX127xGetDio1PinState(void)
|
|
{
|
|
#if SX127X_DIO_GPIO_LEN(0) >= 2
|
|
if (gpio_pin_get_dt(&sx127x_dios[1]) > 0) {
|
|
return 1U;
|
|
}
|
|
#endif
|
|
|
|
return 0U;
|
|
}
|
|
|
|
/* Initialize Radio driver callbacks */
|
|
const struct Radio_s Radio = {
|
|
.Init = SX127xInit,
|
|
.GetStatus = SX127xGetStatus,
|
|
.SetModem = SX127xSetModem,
|
|
.SetChannel = SX127xSetChannel,
|
|
.IsChannelFree = SX127xIsChannelFree,
|
|
.Random = SX127xRandom,
|
|
.SetRxConfig = SX127xSetRxConfig,
|
|
.SetTxConfig = SX127xSetTxConfig,
|
|
.CheckRfFrequency = SX127xCheckRfFrequency,
|
|
.TimeOnAir = SX127xGetTimeOnAir,
|
|
.Send = SX127xSend,
|
|
.Sleep = SX127xSetSleep,
|
|
.Standby = SX127xSetStby,
|
|
.Rx = SX127xSetRx,
|
|
.Write = SX127xWrite,
|
|
.Read = SX127xRead,
|
|
.WriteBuffer = SX127xWriteBuffer,
|
|
.ReadBuffer = SX127xReadBuffer,
|
|
.SetMaxPayloadLength = SX127xSetMaxPayloadLength,
|
|
.SetPublicNetwork = SX127xSetPublicNetwork,
|
|
.GetWakeupTime = SX127xGetWakeupTime,
|
|
.IrqProcess = NULL,
|
|
.RxBoosted = NULL,
|
|
.SetRxDutyCycle = NULL,
|
|
.SetTxContinuousWave = SX127xSetTxContinuousWave,
|
|
};
|
|
|
|
static int sx127x_antenna_configure(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = sx12xx_configure_pin(antenna_enable, GPIO_OUTPUT_INACTIVE);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
|
|
ret = sx12xx_configure_pin(rfi_enable, GPIO_OUTPUT_INACTIVE);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
|
|
ret = sx12xx_configure_pin(rfo_enable, GPIO_OUTPUT_INACTIVE);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
|
|
ret = sx12xx_configure_pin(pa_boost_enable, GPIO_OUTPUT_INACTIVE);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sx127x_lora_init(const struct device *dev)
|
|
{
|
|
int ret;
|
|
uint8_t regval;
|
|
|
|
if (!spi_is_ready(&dev_config.bus)) {
|
|
LOG_ERR("SPI device not ready");
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = sx12xx_configure_pin(tcxo_power, GPIO_OUTPUT_INACTIVE);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
|
|
/* Setup Reset gpio and perform soft reset */
|
|
ret = sx12xx_configure_pin(reset, GPIO_OUTPUT_ACTIVE);
|
|
if (ret) {
|
|
return ret;
|
|
}
|
|
|
|
k_sleep(K_MSEC(100));
|
|
gpio_pin_set_dt(&dev_config.reset, 0);
|
|
k_sleep(K_MSEC(100));
|
|
|
|
ret = sx127x_read(REG_VERSION, ®val, 1);
|
|
if (ret < 0) {
|
|
LOG_ERR("Unable to read version info");
|
|
return -EIO;
|
|
}
|
|
|
|
LOG_INF("SX127x version 0x%02x found", regval);
|
|
|
|
ret = sx127x_antenna_configure();
|
|
if (ret < 0) {
|
|
LOG_ERR("Unable to configure antenna");
|
|
return -EIO;
|
|
}
|
|
|
|
ret = sx12xx_init(dev);
|
|
if (ret < 0) {
|
|
LOG_ERR("Failed to initialize SX12xx common");
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct lora_driver_api sx127x_lora_api = {
|
|
.config = sx12xx_lora_config,
|
|
.send = sx12xx_lora_send,
|
|
.send_async = sx12xx_lora_send_async,
|
|
.recv = sx12xx_lora_recv,
|
|
.recv_async = sx12xx_lora_recv_async,
|
|
.test_cw = sx12xx_lora_test_cw,
|
|
};
|
|
|
|
DEVICE_DT_INST_DEFINE(0, &sx127x_lora_init, NULL, NULL,
|
|
NULL, POST_KERNEL, CONFIG_LORA_INIT_PRIORITY,
|
|
&sx127x_lora_api);
|