blob: 8bdefedd1908d471f53bd933fe979338aadb9296 [file] [log] [blame]
/*
* Copyright (c) 2021 Florin Stancu
*
* SPDX-License-Identifier: Apache-2.0
*/
/*
* Implements the RF driver callback to configure the on-board antenna
* switch.
*/
#define DT_DRV_COMPAT skyworks_sky13317
#include <zephyr/init.h>
#include <zephyr/device.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/drivers/pinctrl.h>
#include <ti/drivers/rf/RF.h>
#include <driverlib/rom.h>
#include <driverlib/interrupt.h>
/* custom pinctrl states for the antenna mux */
#define PINCTRL_STATE_ANT_24G 1
#define PINCTRL_STATE_ANT_24G_PA 2
#define PINCTRL_STATE_ANT_SUBG 3
#define PINCTRL_STATE_ANT_SUBG_PA 4
#define BOARD_ANT_GPIO_24G 0
#define BOARD_ANT_GPIO_PA 1
#define BOARD_ANT_GPIO_SUBG 2
#define ANTENNA_MUX DT_NODELABEL(antenna_mux0)
static int board_antenna_init(const struct device *dev);
static void board_cc13xx_rf_callback(RF_Handle client, RF_GlobalEvent events,
void *arg);
const RFCC26XX_HWAttrsV2 RFCC26XX_hwAttrs = {
.hwiPriority = INT_PRI_LEVEL7,
.swiPriority = 0,
.xoscHfAlwaysNeeded = true,
/* RF driver callback for custom antenna switching */
.globalCallback = board_cc13xx_rf_callback,
/* Subscribe to events */
.globalEventMask = (RF_GlobalEventRadioSetup |
RF_GlobalEventRadioPowerDown),
};
PINCTRL_DT_INST_DEFINE(0);
DEVICE_DT_INST_DEFINE(0, board_antenna_init, NULL, NULL, NULL,
POST_KERNEL, CONFIG_BOARD_ANTENNA_INIT_PRIO, NULL);
static const struct pinctrl_dev_config *ant_pcfg = PINCTRL_DT_INST_DEV_CONFIG_GET(0);
static const struct gpio_dt_spec ant_gpios[] = {
GPIO_DT_SPEC_GET_BY_IDX_OR(ANTENNA_MUX, gpios, BOARD_ANT_GPIO_24G, {0}),
GPIO_DT_SPEC_GET_BY_IDX_OR(ANTENNA_MUX, gpios, BOARD_ANT_GPIO_PA, {0}),
GPIO_DT_SPEC_GET_BY_IDX_OR(ANTENNA_MUX, gpios, BOARD_ANT_GPIO_SUBG, {0}),
};
/**
* Antenna switch GPIO init routine.
*/
int board_antenna_init(const struct device *dev)
{
ARG_UNUSED(dev);
int i;
/* default pinctrl configuration: set all antenna mux control pins as GPIOs */
pinctrl_apply_state(ant_pcfg, PINCTRL_STATE_DEFAULT);
/* set all GPIOs to 0 (all RF paths disabled) */
for (i = 0; i < ARRAY_SIZE(ant_gpios); i++) {
gpio_pin_configure_dt(&ant_gpios[i], 0);
}
return 0;
}
/**
* Custom TI RFCC26XX callback for switching the on-board antenna mux on radio setup.
*/
void board_cc13xx_rf_callback(RF_Handle client, RF_GlobalEvent events, void *arg)
{
bool sub1GHz = false;
uint8_t loDivider = 0;
int i;
/* Clear all antenna switch GPIOs (for all cases). */
for (i = 0; i < ARRAY_SIZE(ant_gpios); i++) {
gpio_pin_configure_dt(&ant_gpios[i], 0);
}
if (events & RF_GlobalEventRadioSetup) {
/* Decode the current PA configuration. */
RF_TxPowerTable_PAType paType = (RF_TxPowerTable_PAType)
RF_getTxPower(client).paType;
/* Decode the generic argument as a setup command. */
RF_RadioSetup *setupCommand = (RF_RadioSetup *)arg;
switch (setupCommand->common.commandNo) {
case CMD_RADIO_SETUP:
case CMD_BLE5_RADIO_SETUP:
loDivider = RF_LODIVIDER_MASK & setupCommand->common.loDivider;
break;
case CMD_PROP_RADIO_DIV_SETUP:
loDivider = RF_LODIVIDER_MASK & setupCommand->prop_div.loDivider;
break;
default:
break;
}
sub1GHz = (loDivider != 0);
if (sub1GHz) {
if (paType == RF_TxPowerTable_HighPA) {
/* Note: RFC_GPO3 is a work-around because the RFC_GPO1 */
/* is sometimes not de-asserted on CC1352 Rev A. */
pinctrl_apply_state(ant_pcfg, PINCTRL_STATE_ANT_SUBG_PA);
} else {
pinctrl_apply_state(ant_pcfg, PINCTRL_STATE_ANT_SUBG);
/* Manually set the sub-GHZ antenna switch DIO */
gpio_pin_configure_dt(&ant_gpios[BOARD_ANT_GPIO_SUBG], 1);
}
} else /* 2.4 GHz */ {
if (paType == RF_TxPowerTable_HighPA) {
pinctrl_apply_state(ant_pcfg, PINCTRL_STATE_ANT_24G_PA);
} else {
pinctrl_apply_state(ant_pcfg, PINCTRL_STATE_ANT_24G);
/* Manually set the 2.4GHZ antenna switch DIO */
gpio_pin_configure_dt(&ant_gpios[BOARD_ANT_GPIO_24G], 1);
}
}
} else {
pinctrl_apply_state(ant_pcfg, PINCTRL_STATE_DEFAULT);
}
}