hackrf

/*
 * Copyright 2012-2026 Great Scott Gadgets <info@greatscottgadgets.com>
 * Copyright 2012 Jared Boone
 * Copyright 2013 Benjamin Vernoux
 *
 * This file is part of HackRF.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#include "rf_path.h"

#include "max283x.h"
#include "max5864.h"
#include "mixer.h"
#include "platform_detect.h"
#ifdef IS_NOT_JAWBREAKER
	#include <libopencm3/lpc43xx/scu.h>
	#include "platform_scu.h"
	#include "platform_gpio.h"
#endif

/* RF Path instance. */
rf_path_t rf_path = {
	.switchctrl = 0,
};

/*
 * RF switches on Jawbreaker are controlled by General Purpose Outputs (GPO) on
 * the RFFC5072.
 *
 * On HackRF One, the same signals are controlled by GPIO on the LPC.
 * SWITCHCTRL_NO_TX_AMP_PWR and SWITCHCTRL_NO_RX_AMP_PWR are not normally used
 * on HackRF One as the amplifier power is instead controlled only by
 * SWITCHCTRL_AMP_BYPASS.
 *
 * The rad1o also uses GPIO pins to control the different switches. The amplifiers
 * are also connected to the LPC.
 *
 * On Praline, a subset of control signals is managed by GPIO pins on the LPC, while
 * the remaining signals are generated through combinatorial logic in hardware.
 */
#define SWITCHCTRL_NO_TX_AMP_PWR (1 << 0) /* GPO1 turn off TX amp power */
#define SWITCHCTRL_AMP_BYPASS    (1 << 1) /* GPO2 bypass amp section */
#define SWITCHCTRL_TX            (1 << 2) /* GPO3 1 for TX mode, 0 for RX mode */
#define SWITCHCTRL_MIX_BYPASS    (1 << 3) /* GPO4 bypass RFFC5072 mixer section */
#define SWITCHCTRL_HP            (1 << 4) /* GPO5 1 for high-pass, 0 for low-pass */
#define SWITCHCTRL_NO_RX_AMP_PWR (1 << 5) /* GPO6 turn off RX amp power */

/*
 *  GPO6  GPO5  GPO4 GPO3  GPO2  GPO1
 * !RXAMP  HP  MIXBP  TX  AMPBP !TXAMP  Mix mode   Amp mode
 *    1    X     1    1     1      1    TX bypass  Bypass
 *    1    X     1    1     0      0    TX bypass  TX amplified
 *    1    1     0    1     1      1    TX high    Bypass
 *    1    1     0    1     0      0    TX high    TX amplified
 *    1    0     0    1     1      1    TX low     Bypass
 *    1    0     0    1     0      0    TX low     TX amplified
 *    1    X     1    0     1      1    RX bypass  Bypass
 *    0    X     1    0     0      1    RX bypass  RX amplified
 *    1    1     0    0     1      1    RX high    Bypass
 *    0    1     0    0     0      1    RX high    RX amplified
 *    1    0     0    0     1      1    RX low     Bypass
 *    0    0     0    0     0      1    RX low     RX amplified
 */

/*
 * Safe (initial) switch settings turn off both amplifiers and enable both amp
 * bypass and mixer bypass.
 */
#define SWITCHCTRL_SAFE                                                     \
	(SWITCHCTRL_NO_TX_AMP_PWR | SWITCHCTRL_AMP_BYPASS | SWITCHCTRL_TX | \
	 SWITCHCTRL_MIX_BYPASS | SWITCHCTRL_HP | SWITCHCTRL_NO_RX_AMP_PWR)

/*
 * Antenna port power on HackRF One (except r9) is controlled by GPO1 on the
 * RFFC5072.  This is the only thing we use RFFC5072 GPO for on HackRF One.
 * The value of SWITCHCTRL_NO_ANT_PWR does not correspond to the GPO1 bit in
 * the gpo register.
 */

#define SWITCHCTRL_ANT_PWR (1 << 6) /* turn on antenna port power */

#ifdef IS_HACKRF_ONE
static void switchctrl_set_hackrf_one(rf_path_t* const rf_path, uint8_t ctrl)
{
	board_id_t board_id = detected_platform();

	if (ctrl & SWITCHCTRL_TX) {
		if (board_id != BOARD_ID_HACKRF1_R9) {
			gpio_set(rf_path->gpio_tx);
		}
		gpio_clear(rf_path->gpio_rx);
	} else {
		if (board_id != BOARD_ID_HACKRF1_R9) {
			gpio_clear(rf_path->gpio_tx);
		}
		gpio_set(rf_path->gpio_rx);
	}

	if (ctrl & SWITCHCTRL_MIX_BYPASS) {
		gpio_set(rf_path->gpio_mix_bypass);
		gpio_clear(rf_path->gpio_no_mix_bypass);
		if (ctrl & SWITCHCTRL_TX) {
			gpio_set(rf_path->gpio_tx_mix_bp);
			gpio_clear(rf_path->gpio_rx_mix_bp);
		} else {
			gpio_clear(rf_path->gpio_tx_mix_bp);
			gpio_set(rf_path->gpio_rx_mix_bp);
		}
	} else {
		gpio_clear(rf_path->gpio_mix_bypass);
		gpio_set(rf_path->gpio_no_mix_bypass);
		gpio_clear(rf_path->gpio_tx_mix_bp);
		gpio_clear(rf_path->gpio_rx_mix_bp);
	}

	if (ctrl & SWITCHCTRL_HP) {
		gpio_set(rf_path->gpio_hp);
		gpio_clear(rf_path->gpio_lp);
	} else {
		gpio_clear(rf_path->gpio_hp);
		gpio_set(rf_path->gpio_lp);
	}

	if (ctrl & SWITCHCTRL_AMP_BYPASS) {
		gpio_set(rf_path->gpio_amp_bypass);
		gpio_clear(rf_path->gpio_tx_amp);
		gpio_set(rf_path->gpio_no_tx_amp_pwr);
		gpio_clear(rf_path->gpio_rx_amp);
		gpio_set(rf_path->gpio_no_rx_amp_pwr);
	} else if (ctrl & SWITCHCTRL_TX) {
		gpio_clear(rf_path->gpio_amp_bypass);
		gpio_set(rf_path->gpio_tx_amp);
		gpio_clear(rf_path->gpio_no_tx_amp_pwr);
		gpio_clear(rf_path->gpio_rx_amp);
		gpio_set(rf_path->gpio_no_rx_amp_pwr);
	} else {
		gpio_clear(rf_path->gpio_amp_bypass);
		gpio_clear(rf_path->gpio_tx_amp);
		gpio_set(rf_path->gpio_no_tx_amp_pwr);
		gpio_set(rf_path->gpio_rx_amp);
		gpio_clear(rf_path->gpio_no_rx_amp_pwr);
	}

	/*
	 * These normally shouldn't be set post-Jawbreaker, but they can be
	 * used to explicitly turn off power to the amplifiers while AMP_BYPASS
	 * is unset:
	 */
	if (ctrl & SWITCHCTRL_NO_TX_AMP_PWR) {
		gpio_set(rf_path->gpio_no_tx_amp_pwr);
	}
	if (ctrl & SWITCHCTRL_NO_RX_AMP_PWR) {
		gpio_set(rf_path->gpio_no_rx_amp_pwr);
	}

	if (board_id == BOARD_ID_HACKRF1_R9) {
		if (ctrl & SWITCHCTRL_ANT_PWR) {
			gpio_clear(rf_path->gpio_h1r9_no_ant_pwr);
		} else {
			gpio_set(rf_path->gpio_h1r9_no_ant_pwr);
		}
	} else {
		if (ctrl & SWITCHCTRL_ANT_PWR) {
			mixer_set_gpo(
				&mixer,
				0x00); /* turn on antenna power by clearing GPO1 */
		} else {
			mixer_set_gpo(
				&mixer,
				0x01); /* turn off antenna power by setting GPO1 */
		}
	}
}
#endif

#ifdef IS_PRALINE
static void switchctrl_set_praline(rf_path_t* const rf_path, uint8_t ctrl)
{
	if (ctrl & SWITCHCTRL_TX) {
		gpio_set(rf_path->gpio_tx_en);
		if (ctrl & SWITCHCTRL_NO_TX_AMP_PWR) {
			ctrl |= SWITCHCTRL_AMP_BYPASS;
		}
	} else {
		gpio_clear(rf_path->gpio_tx_en);
		if (ctrl & SWITCHCTRL_NO_RX_AMP_PWR) {
			ctrl |= SWITCHCTRL_AMP_BYPASS;
		}
	}

	if (ctrl & SWITCHCTRL_MIX_BYPASS) {
		gpio_set(rf_path->gpio_mix_en_n);
	} else {
		gpio_clear(rf_path->gpio_mix_en_n);
	}

	if (ctrl & SWITCHCTRL_HP) {
		gpio_clear(rf_path->gpio_lpf_en);
	} else {
		gpio_set(rf_path->gpio_lpf_en);
	}

	if (ctrl & SWITCHCTRL_AMP_BYPASS) {
		gpio_clear(rf_path->gpio_rf_amp_en);
	} else {
		gpio_set(rf_path->gpio_rf_amp_en);
	}

	if (ctrl & SWITCHCTRL_ANT_PWR) {
		gpio_clear(rf_path->gpio_ant_bias_en_n);
	} else {
		gpio_set(rf_path->gpio_ant_bias_en_n);
	}
}
#endif

#ifdef IS_RAD1O
static void switchctrl_set_rad1o(rf_path_t* const rf_path, uint8_t ctrl)
{
	if (ctrl & SWITCHCTRL_TX) {
		gpio_set(rf_path->gpio_tx_rx_n);
		gpio_clear(rf_path->gpio_tx_rx);
	} else {
		gpio_clear(rf_path->gpio_tx_rx_n);
		gpio_set(rf_path->gpio_tx_rx);
	}

	if (ctrl & SWITCHCTRL_MIX_BYPASS) {
		gpio_clear(rf_path->gpio_by_mix);
		gpio_set(rf_path->gpio_by_mix_n);
		gpio_clear(rf_path->gpio_mixer_en);
	} else {
		gpio_set(rf_path->gpio_by_mix);
		gpio_clear(rf_path->gpio_by_mix_n);
		gpio_set(rf_path->gpio_mixer_en);
	}

	if (ctrl & SWITCHCTRL_HP) {
		gpio_set(rf_path->gpio_low_high_filt);
		gpio_clear(rf_path->gpio_low_high_filt_n);
	} else {
		gpio_clear(rf_path->gpio_low_high_filt);
		gpio_set(rf_path->gpio_low_high_filt_n);
	}

	if (ctrl & SWITCHCTRL_AMP_BYPASS) {
		gpio_clear(rf_path->gpio_by_amp);
		gpio_set(rf_path->gpio_by_amp_n);

		gpio_clear(rf_path->gpio_tx_amp);
		gpio_clear(rf_path->gpio_rx_lna);

	} else if (ctrl & SWITCHCTRL_TX) {
		gpio_set(rf_path->gpio_by_amp);
		gpio_clear(rf_path->gpio_by_amp_n);

		gpio_set(rf_path->gpio_tx_amp);
		gpio_clear(rf_path->gpio_rx_lna);

	} else {
		gpio_set(rf_path->gpio_by_amp);
		gpio_clear(rf_path->gpio_by_amp_n);

		gpio_clear(rf_path->gpio_tx_amp);
		gpio_set(rf_path->gpio_rx_lna);
	}

	/*
	 * These normally shouldn't be set post-Jawbreaker, but they can be
	 * used to explicitly turn off power to the amplifiers while AMP_BYPASS
	 * is unset:
	 */
	if (ctrl & SWITCHCTRL_NO_TX_AMP_PWR) {
		gpio_clear(rf_path->gpio_tx_amp);
	}
	if (ctrl & SWITCHCTRL_NO_RX_AMP_PWR) {
		gpio_clear(rf_path->gpio_rx_lna);
	}
}
#endif

static void switchctrl_set(rf_path_t* const rf_path, const uint8_t gpo)
{
#ifdef IS_JAWBREAKER
	if (IS_JAWBREAKER) {
		(void) rf_path;
		mixer_set_gpo(&mixer, gpo);
	}
#endif
#ifdef IS_HACKRF_ONE
	if (IS_HACKRF_ONE) {
		switchctrl_set_hackrf_one(rf_path, gpo);
	}
#endif
#ifdef IS_PRALINE
	if (IS_PRALINE) {
		switchctrl_set_praline(rf_path, gpo);
	}
#endif
#ifdef IS_RAD1O
	if (IS_RAD1O) {
		switchctrl_set_rad1o(rf_path, gpo);
	}
#endif
}

void rf_path_pin_shutdown(void)
{
#ifdef IS_PRALINE
	if (IS_PRALINE) {
		const platform_scu_t* scu = platform_scu();

		/* Configure RF switch control signals */
		scu_pinmux(scu->TX_EN, SCU_GPIO_PDN | SCU_CONF_FUNCTION0);
		board_rev_t rev = detected_revision();
		if ((rev == BOARD_REV_PRALINE_R1_0) ||
		    (rev == BOARD_REV_GSG_PRALINE_R1_0)) {
			scu_pinmux(scu->MIX_EN_N_R1_0, SCU_GPIO_PDN | SCU_CONF_FUNCTION4);
		} else {
			scu_pinmux(scu->MIX_EN_N, SCU_GPIO_PDN | SCU_CONF_FUNCTION0);
		}
		scu_pinmux(scu->LPF_EN, SCU_GPIO_PDN | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->RF_AMP_EN, SCU_GPIO_PDN | SCU_CONF_FUNCTION0);

		/* Configure antenna port power control signal */
		scu_pinmux(scu->ANT_BIAS_EN_N, SCU_GPIO_PDN | SCU_CONF_FUNCTION0);

		/* Configure RF power supply (VAA) switch */
		scu_pinmux(scu->NO_VAA_ENABLE, SCU_GPIO_PDN | SCU_CONF_FUNCTION0);

		/* Disable narrowband filter. */
		narrowband_filter_set(0);
		gpio_output(platform_gpio()->aa_en);
	}
#endif
}

void rf_path_pin_setup(rf_path_t* const rf_path)
{
#ifdef IS_JAWBREAKER
	(void) rf_path;
#else
	const platform_gpio_t* gpio = platform_gpio();
	const platform_scu_t* scu = platform_scu();
#endif

	// initialize rf_path struct and assign gpio's
#ifdef IS_HACKRF_ONE
	if (IS_HACKRF_ONE) {
		*rf_path = (rf_path_t){
			.switchctrl = 0,
			.gpio_hp = gpio->hp,
			.gpio_lp = gpio->lp,
			.gpio_tx_mix_bp = gpio->tx_mix_bp,
			.gpio_no_mix_bypass = gpio->no_mix_bypass,
			.gpio_rx_mix_bp = gpio->rx_mix_bp,
			.gpio_tx_amp = gpio->tx_amp,
			.gpio_tx = gpio->tx,
			.gpio_mix_bypass = gpio->mix_bypass,
			.gpio_rx = gpio->rx,
			.gpio_no_tx_amp_pwr = gpio->no_tx_amp_pwr,
			.gpio_amp_bypass = gpio->amp_bypass,
			.gpio_rx_amp = gpio->rx_amp,
			.gpio_no_rx_amp_pwr = gpio->no_rx_amp_pwr,
		};
	#ifdef IS_H1_R9
		if (IS_H1_R9) {
			rf_path->gpio_rx = gpio->h1r9_rx;
			rf_path->gpio_h1r9_no_ant_pwr = gpio->h1r9_no_ant_pwr;
		}
	#endif
	}
#endif

#ifdef IS_RAD1O
	if (IS_RAD1O) {
		*rf_path = (rf_path_t){
			.switchctrl = 0,
			.gpio_tx_rx_n = gpio->tx_rx_n,
			.gpio_tx_rx = gpio->tx_rx,
			.gpio_by_mix = gpio->by_mix,
			.gpio_by_mix_n = gpio->by_mix_n,
			.gpio_by_amp = gpio->by_amp,
			.gpio_by_amp_n = gpio->by_amp_n,
			.gpio_mixer_en = gpio->mixer_en,
			.gpio_low_high_filt = gpio->low_high_filt,
			.gpio_low_high_filt_n = gpio->low_high_filt_n,
			.gpio_tx_amp = gpio->tx_amp,
			.gpio_rx_lna = gpio->rx_lna,
		};
	}
#endif

#ifdef IS_PRALINE
	if (IS_PRALINE) {
		*rf_path = (rf_path_t){
			.switchctrl = 0,
			.gpio_tx_en = gpio->tx_en,
			.gpio_mix_en_n = gpio->mix_en_n,
			.gpio_lpf_en = gpio->lpf_en,
			.gpio_rf_amp_en = gpio->rf_amp_en,
			.gpio_ant_bias_en_n = gpio->ant_bias_en_n,
		};
		if ((detected_revision() == BOARD_REV_PRALINE_R1_0) ||
		    (detected_revision() == BOARD_REV_GSG_PRALINE_R1_0)) {
			rf_path->gpio_mix_en_n = gpio->mix_en_n_r1_0;
		}
		scu_pinmux(scu->PINMUX_FPGA_CRESET, SCU_GPIO_NOPULL | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->PINMUX_FPGA_CDONE, SCU_GPIO_PUP | SCU_CONF_FUNCTION4);
		scu_pinmux(scu->PINMUX_FPGA_SPI_CS, SCU_GPIO_NOPULL | SCU_CONF_FUNCTION0);
	}
#endif

#ifdef IS_HACKRF_ONE
	if (IS_HACKRF_ONE) {
		/* Configure RF switch control signals */
		// clang-format off
		scu_pinmux(scu->HP,            SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->LP,            SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->TX_MIX_BP,     SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->NO_MIX_BYPASS, SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->RX_MIX_BP,     SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->TX_AMP,        SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->MIX_BYPASS,    SCU_GPIO_FAST | SCU_CONF_FUNCTION4);
		scu_pinmux(scu->NO_TX_AMP_PWR, SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->AMP_BYPASS,    SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->RX_AMP,        SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->NO_RX_AMP_PWR, SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		// clang-format on
	#ifdef IS_H1_R9
		if (IS_H1_R9) {
			scu_pinmux(scu->H1R9_RX, SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
			scu_pinmux(
				scu->H1R9_NO_ANT_PWR,
				SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
			gpio_clear(rf_path->gpio_h1r9_no_ant_pwr);
			gpio_output(rf_path->gpio_h1r9_no_ant_pwr);
			scu_pinmux(
				scu->H1R9_NO_VAA_EN,
				SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		}
	#endif
	#ifdef IS_NOT_H1_R9
		if (IS_NOT_H1_R9) {
			scu_pinmux(scu->TX, SCU_GPIO_FAST | SCU_CONF_FUNCTION4);
			scu_pinmux(scu->RX, SCU_GPIO_FAST | SCU_CONF_FUNCTION4);
			gpio_output(rf_path->gpio_tx);
			scu_pinmux(scu->NO_VAA_ENABLE, SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		}
	#endif

		/*
		 * Safe (initial) switch settings turn off both amplifiers and antenna port
		 * power and enable both amp bypass and mixer bypass.
		 */
		switchctrl_set(rf_path, SWITCHCTRL_SAFE);

		/* Configure RF switch control signals as outputs */
		gpio_output(rf_path->gpio_amp_bypass);
		gpio_output(rf_path->gpio_no_mix_bypass);
		gpio_output(rf_path->gpio_rx_amp);
		gpio_output(rf_path->gpio_no_rx_amp_pwr);
		gpio_output(rf_path->gpio_hp);
		gpio_output(rf_path->gpio_lp);
		gpio_output(rf_path->gpio_tx_mix_bp);
		gpio_output(rf_path->gpio_rx_mix_bp);
		gpio_output(rf_path->gpio_tx_amp);
		gpio_output(rf_path->gpio_no_tx_amp_pwr);
		gpio_output(rf_path->gpio_mix_bypass);
		gpio_output(rf_path->gpio_rx);
	}
#endif
#ifdef IS_RAD1O
	if (IS_RAD1O) {
		/* Configure RF switch control signals */
		// clang-format off
		scu_pinmux(scu->BY_AMP,          SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->BY_AMP_N,        SCU_GPIO_FAST | SCU_CONF_FUNCTION4);
		scu_pinmux(scu->TX_RX,           SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->TX_RX_N,         SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->BY_MIX,          SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->BY_MIX_N,        SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->LOW_HIGH_FILT,   SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->LOW_HIGH_FILT_N, SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->TX_AMP,          SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->RX_LNA,          SCU_GPIO_FAST | SCU_CONF_FUNCTION4);
		scu_pinmux(scu->MIXER_EN,        SCU_GPIO_FAST | SCU_CONF_FUNCTION4);
		// clang-format on

		/* Configure RF power supply (VAA) switch */
		scu_pinmux(scu->VAA_ENABLE, SCU_GPIO_FAST | SCU_CONF_FUNCTION0);

		/*
		 * Safe (initial) switch settings turn off both amplifiers and antenna port
		 * power and enable both amp bypass and mixer bypass.
		 */
		switchctrl_set(rf_path, SWITCHCTRL_SAFE);

		/* Configure RF switch control signals as outputs */
		gpio_output(rf_path->gpio_tx_rx_n);
		gpio_output(rf_path->gpio_tx_rx);
		gpio_output(rf_path->gpio_by_mix);
		gpio_output(rf_path->gpio_by_mix_n);
		gpio_output(rf_path->gpio_by_amp);
		gpio_output(rf_path->gpio_by_amp_n);
		gpio_output(rf_path->gpio_mixer_en);
		gpio_output(rf_path->gpio_low_high_filt);
		gpio_output(rf_path->gpio_low_high_filt_n);
		gpio_output(rf_path->gpio_tx_amp);
		gpio_output(rf_path->gpio_rx_lna);
	}
#endif

#ifdef IS_PRALINE
	if (IS_PRALINE) {
		/* Configure RF switch control signals */
		scu_pinmux(scu->TX_EN, SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		board_rev_t rev = detected_revision();
		if ((rev == BOARD_REV_PRALINE_R1_0) ||
		    (rev == BOARD_REV_GSG_PRALINE_R1_0)) {
			scu_pinmux(scu->MIX_EN_N_R1_0, SCU_GPIO_FAST | SCU_CONF_FUNCTION4);
		} else {
			scu_pinmux(scu->MIX_EN_N, SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		}
		scu_pinmux(scu->LPF_EN, SCU_GPIO_FAST | SCU_CONF_FUNCTION0);
		scu_pinmux(scu->RF_AMP_EN, SCU_GPIO_FAST | SCU_CONF_FUNCTION0);

		/* Configure antenna port power control signal */
		scu_pinmux(scu->ANT_BIAS_EN_N, SCU_GPIO_FAST | SCU_CONF_FUNCTION0);

		/* Configure RF power supply (VAA) switch */
		scu_pinmux(scu->NO_VAA_ENABLE, SCU_GPIO_FAST | SCU_CONF_FUNCTION0);

		/*
		 * Safe (initial) switch settings turn off both amplifiers and antenna port
		 * power and enable both amp bypass and mixer bypass.
		 */
		switchctrl_set(rf_path, SWITCHCTRL_SAFE);

		/* Configure RF switch control signals as outputs */
		gpio_output(rf_path->gpio_ant_bias_en_n);
		gpio_output(rf_path->gpio_tx_en);
		gpio_output(rf_path->gpio_mix_en_n);
		gpio_output(rf_path->gpio_lpf_en);
		gpio_output(rf_path->gpio_rf_amp_en);
	}
#endif
}

void rf_path_init(rf_path_t* const rf_path)
{
	max5864_setup(&max5864);
	max5864_shutdown(&max5864);

	max283x_setup(&max283x);
	max283x_start(&max283x);

#ifdef IS_RAD1O
	if (IS_RAD1O) {
		mixer_setup(&mixer, MAX2871_VARIANT);
	}
#endif
#ifdef IS_NOT_RAD1O
	if (IS_NOT_RAD1O) {
	#ifdef IS_NOT_HACKRF_ONE
		if (IS_NOT_HACKRF_ONE) {
			mixer_setup(&mixer, RFFC5071_VARIANT);
		}
	#endif
	}
#endif
	rf_path->switchctrl = SWITCHCTRL_SAFE;
}

void rf_path_set_direction(rf_path_t* const rf_path, const rf_path_direction_t direction)
{
	/* Turn off TX and RX amplifiers, then enable based on direction and bypass state. */
	rf_path->switchctrl |= SWITCHCTRL_NO_TX_AMP_PWR | SWITCHCTRL_NO_RX_AMP_PWR;

	switch (direction) {
	case RF_PATH_DIRECTION_TX:
		rf_path->switchctrl |= SWITCHCTRL_TX;
		if ((rf_path->switchctrl & SWITCHCTRL_AMP_BYPASS) == 0) {
			/* TX amplifier is in path, be sure to enable TX amplifier. */
			rf_path->switchctrl &= ~SWITCHCTRL_NO_TX_AMP_PWR;
		}
		if (rf_path->switchctrl & SWITCHCTRL_MIX_BYPASS) {
			mixer_disable(&mixer);
		} else {
			mixer_enable(&mixer);
		}
		max5864_tx(&max5864);
		max283x_tx(&max283x);
		break;

	case RF_PATH_DIRECTION_RX:
		rf_path->switchctrl &= ~SWITCHCTRL_TX;
		if ((rf_path->switchctrl & SWITCHCTRL_AMP_BYPASS) == 0) {
			/* RX amplifier is in path, be sure to enable RX amplifier. */
			rf_path->switchctrl &= ~SWITCHCTRL_NO_RX_AMP_PWR;
		}
		if (rf_path->switchctrl & SWITCHCTRL_MIX_BYPASS) {
			mixer_disable(&mixer);
		} else {
			mixer_enable(&mixer);
		}
		max5864_rx(&max5864);
		max283x_rx(&max283x);
		break;

#ifdef IS_PRALINE
	case RF_PATH_DIRECTION_TX_CALIBRATION:
	case RF_PATH_DIRECTION_RX_CALIBRATION:
		rf_path->switchctrl &= ~SWITCHCTRL_TX;
		mixer_disable(&mixer);
		max5864_xcvr(&max5864);
		if (direction == RF_PATH_DIRECTION_TX_CALIBRATION) {
			max283x_tx_calibration(&max283x);
		} else {
			max283x_rx_calibration(&max283x);
		}
		break;
#endif

	case RF_PATH_DIRECTION_OFF:
	default:
		rf_path_set_lna(rf_path, 0);
		/* Set RF path to receive direction when "off" */
		rf_path->switchctrl &= ~SWITCHCTRL_TX;
		mixer_disable(&mixer);
		max5864_standby(&max5864);
		max283x_set_mode(&max283x, MAX283x_MODE_STANDBY);
		break;
	}

	switchctrl_set(rf_path, rf_path->switchctrl);
}

void rf_path_set_filter(rf_path_t* const rf_path, const rf_path_filter_t filter)
{
	switch (filter) {
	default:
	case RF_PATH_FILTER_BYPASS:
		rf_path->switchctrl |= SWITCHCTRL_MIX_BYPASS;
		mixer_disable(&mixer);
		break;

	case RF_PATH_FILTER_LOW_PASS:
		rf_path->switchctrl &= ~(SWITCHCTRL_HP | SWITCHCTRL_MIX_BYPASS);
		mixer_enable(&mixer);
		break;

	case RF_PATH_FILTER_HIGH_PASS:
		rf_path->switchctrl &= ~SWITCHCTRL_MIX_BYPASS;
		rf_path->switchctrl |= SWITCHCTRL_HP;
		mixer_enable(&mixer);
		break;
	}

	switchctrl_set(rf_path, rf_path->switchctrl);
}

void rf_path_set_lna(rf_path_t* const rf_path, const uint_fast8_t enable)
{
	if (enable) {
		if (rf_path->switchctrl & SWITCHCTRL_TX) {
			/* AMP_BYPASS=0, NO_RX_AMP_PWR=1, NO_TX_AMP_PWR=0 */
			rf_path->switchctrl |= SWITCHCTRL_NO_RX_AMP_PWR;
			rf_path->switchctrl &=
				~(SWITCHCTRL_AMP_BYPASS | SWITCHCTRL_NO_TX_AMP_PWR);
		} else {
			/* AMP_BYPASS=0, NO_RX_AMP_PWR=0, NO_TX_AMP_PWR=1 */
			rf_path->switchctrl |= SWITCHCTRL_NO_TX_AMP_PWR;
			rf_path->switchctrl &=
				~(SWITCHCTRL_AMP_BYPASS | SWITCHCTRL_NO_RX_AMP_PWR);
		}
	} else {
		/* AMP_BYPASS=1, NO_RX_AMP_PWR=1, NO_TX_AMP_PWR=1 */
		rf_path->switchctrl |= SWITCHCTRL_AMP_BYPASS | SWITCHCTRL_NO_TX_AMP_PWR |
			SWITCHCTRL_NO_RX_AMP_PWR;
	}

	switchctrl_set(rf_path, rf_path->switchctrl);
}

/* antenna port power control */
void rf_path_set_antenna(rf_path_t* const rf_path, const uint_fast8_t enable)
{
	if (enable) {
		rf_path->switchctrl |= SWITCHCTRL_ANT_PWR;
	} else {
		rf_path->switchctrl &= ~(SWITCHCTRL_ANT_PWR);
	}

	switchctrl_set(rf_path, rf_path->switchctrl);
}

#ifdef IS_PRALINE
void narrowband_filter_set(const uint8_t value)
{
	gpio_write(platform_gpio()->aa_en, value & 1);
}
#endif