sx126x: add support for multiple simultaneous variants

drivers/include/sx126x.h

@@ -32,6 +32,27 @@
 extern "C" {
 #endif
 
+/**
+ * @brief   Whether there's only one variant of this driver at compile time or
+ * not.
+ */
+#define SX126X_SINGLE ((            \
+                          IS_USED(MODULE_SX1261) \
+                        + IS_USED(MODULE_SX1262) \
+                        + IS_USED(MODULE_SX1268) \
+                        + IS_USED(MODULE_LLCC68) \
+                        ) == 1)
+
+/**
+ * @brief   Variant of the SX126x driver.
+ */
+typedef enum {
+    SX126X_TYPE_SX1261,
+    SX126X_TYPE_SX1262,
+    SX126X_TYPE_SX1268,
+    SX126X_TYPE_LLCC68,
+} sx126x_type_t;
+
 /**
  * @brief   Device initialization parameters
  */
@@ -42,6 +63,7 @@ typedef struct {
     gpio_t busy_pin;                    /**< Busy pin */
     gpio_t dio1_pin;                    /**< Dio1 pin */
     sx126x_reg_mod_t regulator;         /**< Power regulator mode */
+    sx126x_type_t type;                 /**< Variant of sx126x */
 } sx126x_params_t;
 
 /**

drivers/sx126x/Kconfig

@@ -1,14 +1,44 @@
 # Copyright (c) 2021 Inria
+# Copyright (c) 2021 HAW Hamburg
 #
 # This file is subject to the terms and conditions of the GNU Lesser
 # General Public License v2.1. See the file LICENSE in the top level
 # directory for more details.
-#
+
+menu "Driver sx126x"
+    depends on TEST_KCONFIG
 
 config MODULE_SX126X
-    bool "SX126X LoRa Sub-GHz radio"
+    bool
-    depends on HAS_PERIPH_GPIO_IRQ
+    select PACKAGE_DRIVER_SX126X
-    depends on PACKAGE_DRIVER_SX126X
-    depends on TEST_KCONFIG
-    select MODULE_PERIPH_GPIO_IRQ
     select MODULE_IOLIST
+
+if HAS_PERIPH_SPI && HAS_PERIPH_GPIO_IRQ
+
+config MODULE_SX1261
+    bool "SX1261"
+    select MODULE_SX126X
+    select MODULE_PERIPH_GPIO
+    select MODULE_PERIPH_GPIO_IRQ
+
+config MODULE_SX1262
+    bool "SX1262"
+    select MODULE_SX126X
+    select MODULE_PERIPH_GPIO
+    select MODULE_PERIPH_GPIO_IRQ
+
+config MODULE_SX1268
+    bool "SX1268"
+    select MODULE_SX126X
+    select MODULE_PERIPH_GPIO
+    select MODULE_PERIPH_GPIO_IRQ
+
+config MODULE_LLCC68
+    bool "LLCC68"
+    select MODULE_SX126X
+    select MODULE_PERIPH_GPIO
+    select MODULE_PERIPH_GPIO_IRQ
+
+endif
+
+endmenu

drivers/sx126x/include/sx126x_internal.h

@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2021 HAW Hamburg
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @defgroup    drivers_sx126x_internal SX1261/2/8 and LLCC68 internal functions
+ * @ingroup     drivers_sx126x
+ * @brief       Internal functions for the SX1261/2/8 and LLCC68
+ *
+ * @{
+ *
+ * @file
+ *
+ * @author      José I. Alamos <jose.alamos@haw-hamburg.de>
+ */
+#ifndef SX126X_INTERNAL_H
+#define SX126X_INTERNAL_H
+
+#include <assert.h>
+#include "sx126x.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief   Check whether the device model is sx1261
+ *
+ * @param[in] dev                      Device descriptor of the driver
+ *
+ * @retval    true if the device is sx1261
+ * @retval    false otherwise
+ */
+static inline bool sx126x_is_sx1261(sx126x_t *dev)
+{
+    assert(dev);
+    if (SX126X_SINGLE) {
+        return IS_USED(MODULE_SX1261);
+    }
+    else {
+        return dev->params->type == SX126X_TYPE_SX1261;
+    }
+}
+
+/**
+ * @brief   Check whether the device model is sx1262
+ *
+ * @param[in] dev                      Device descriptor of the driver
+ *
+ * @retval    true if the device is sx1262
+ * @retval    false otherwise
+ */
+static inline bool sx126x_is_sx1262(sx126x_t *dev)
+{
+    assert(dev);
+    if (SX126X_SINGLE) {
+        return IS_USED(MODULE_SX1262);
+    }
+    else {
+        return dev->params->type == SX126X_TYPE_SX1262;
+    }
+}
+
+/**
+ * @brief   Check whether the device model is llcc68
+ *
+ * @param[in] dev                      Device descriptor of the driver
+ *
+ * @retval    true if the device is llcc68
+ * @retval    false otherwise
+ */
+static inline bool sx126x_is_llcc68(sx126x_t *dev)
+{
+    assert(dev);
+    if (SX126X_SINGLE) {
+        return IS_USED(MODULE_LLCC68);
+    }
+    else {
+        return dev->params->type == SX126X_TYPE_LLCC68;
+    }
+}
+
+/**
+ * @brief   Check whether the device model is sx1268
+ *
+ * @param[in] dev                      Device descriptor of the driver
+ *
+ * @retval    true if the device is sx1268
+ * @retval    false otherwise
+ */
+static inline bool sx126x_is_sx1268(sx126x_t *dev)
+{
+    assert(dev);
+    if (SX126X_SINGLE) {
+        return IS_USED(MODULE_SX1268);
+    }
+    else {
+        return dev->params->type == SX126X_TYPE_SX1268;
+    }
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SX126X_INTERNAL_H */
+/** @} */

drivers/sx126x/include/sx126x_params.h

@@ -57,11 +57,26 @@ extern "C" {
 #define SX126X_PARAM_REGULATOR              SX126X_REG_MODE_DCDC
 #endif
 
+#ifndef SX126X_PARAM_TYPE
+#    if IS_USED(MODULE_SX1261)
+#        define SX126X_PARAM_TYPE SX126X_TYPE_SX1261
+#    elif IS_USED(MODULE_SX1262)
+#        define SX126X_PARAM_TYPE SX126X_TYPE_SX1262
+#    elif IS_USED(MODULE_SX1268)
+#        define SX126X_PARAM_TYPE SX126X_TYPE_SX1268
+#    elif IS_USED(MODULE_LLCC68)
+#        define SX126X_PARAM_TYPE SX126X_TYPE_LLCC68
+#    else
+#        error "You should select at least one of the SX126x variants."
+#    endif
+#endif
+
 #define SX126X_PARAMS             { .spi = SX126X_PARAM_SPI,            \
                                     .nss_pin = SX126X_PARAM_SPI_NSS,    \
                                     .reset_pin = SX126X_PARAM_RESET,    \
                                     .busy_pin = SX126X_PARAM_BUSY,      \
                                     .dio1_pin = SX126X_PARAM_DIO1,      \
+                                    .type     = SX126X_PARAM_TYPE,      \
                                     .regulator = SX126X_PARAM_REGULATOR }
 /**@}*/
 

drivers/sx126x/sx126x.c

@@ -28,6 +28,7 @@
 #include "sx126x_driver.h"
 #include "sx126x.h"
 #include "sx126x_params.h"
+#include "sx126x_internal.h"
 
 #define ENABLE_DEBUG 0
 #include "debug.h"
@@ -104,13 +105,13 @@ static void sx126x_init_default_config(sx126x_t *dev)
      * Values used here comes from the datasheet, section 13.1.14 SetPaConfig
      * and are optimal for a TX output power of 14dBm.
      */
-    if (IS_USED(MODULE_LLCC68) || IS_USED(MODULE_SX1262)) {
+    if (sx126x_is_llcc68(dev) || sx126x_is_sx1262(dev)) {
         sx126x_set_pa_cfg(dev, &sx1262_pa_cfg);
     }
-    else if (IS_USED(MODULE_SX1268)) {
+    else if (sx126x_is_sx1268(dev)) {
         sx126x_set_pa_cfg(dev, &sx1268_pa_cfg);
     }
-    else { /* IS_USED(MODULE_SX1261) */
+    else { /* sx126x_is_sx1261(dev) */
         sx126x_set_pa_cfg(dev, &sx1261_pa_cfg);
     }
     sx126x_set_tx_params(dev, CONFIG_SX126X_TX_POWER_DEFAULT, CONFIG_SX126X_RAMP_TIME_DEFAULT);

drivers/sx126x/sx126x_netdev.c

@@ -29,15 +29,13 @@
 
 #include "sx126x.h"
 #include "sx126x_netdev.h"
+#include "sx126x_internal.h"
 
 #define ENABLE_DEBUG 0
 #include "debug.h"
 
-#if IS_USED(MODULE_LLCC68)
+const uint8_t llcc68_max_sf = LORA_SF11;
-#define SX126X_MAX_SF       LORA_SF11
+const uint8_t sx126x_max_sf = LORA_SF12;
-#else
-#define SX126X_MAX_SF       LORA_SF12
-#endif
 
 static int _send(netdev_t *netdev, const iolist_t *iolist)
 {
@@ -357,7 +355,10 @@ static int _set(netdev_t *netdev, netopt_t opt, const void *val, size_t len)
     case NETOPT_SPREADING_FACTOR:
         assert(len <= sizeof(uint8_t));
         uint8_t sf = *((const uint8_t *)val);
-        if ((sf < LORA_SF6) || (sf > SX126X_MAX_SF)) {
+        const uint8_t max_sf = sx126x_is_llcc68(dev)
+                               ? llcc68_max_sf
+                               : sx126x_max_sf;
+        if ((sf < LORA_SF6) || (sf > max_sf)) {
             res = -EINVAL;
             break;
         }

tests/driver_sx126x/app.config.test

@@ -1,7 +1,6 @@
 # this file enables modules defined in Kconfig. Do not use this file for
 # application configuration. This is only needed during migration.
-CONFIG_MODULE_SX126X=y
+CONFIG_MODULE_SX1261=y
-CONFIG_PACKAGE_DRIVER_SX126X=y
 
 CONFIG_MODULE_SHELL=y
 CONFIG_MODULE_SHELL_COMMANDS=y