tja1042: add driver for tja1042 CAN transceiver

drivers/Makefile.dep

@@ -245,3 +245,8 @@ ifneq (,$(filter adc%1c,$(USEMODULE)))
   FEATURES_REQUIRED += periph_i2c
   USEMODULE += adcxx1c
 endif
+
+ifneq (,$(filter tja1042,$(USEMODULE)))
+  USEMODULE += can_trx
+  FEATURES_REQUIRED += periph_gpio
+endif

drivers/include/tja1042.h

@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2016-2018  OTA keys S.A.
+ *
+ * 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_tja1042 TJA1042
+ * @ingroup     drivers
+ * @ingroup     trx_can
+ * @brief       tja1042 High Speed CAN transceiver driver
+ *
+ * @{
+ *
+ * @file
+ * @brief       tja1042 generic CAN transceiver interface initialization
+ *
+ * @author      Aurelien Gonce <aurelien.gonce@altran.com>
+ * @author      Vincent Dupont <vincent@otakeys.com>
+ */
+#ifndef TJA1042_H
+#define TJA1042_H
+
+#include <stdio.h>
+
+#include "periph/gpio.h"
+#include "can/can_trx.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief   tja1042 CAN trx descriptor
+ */
+typedef struct tja1042_trx {
+    /**
+     *  set mode interface
+     */
+    can_trx_t trx;
+
+    /**
+     *  Mode pin of tja1042 device
+     */
+    gpio_t stb_pin;
+
+} tja1042_trx_t;
+
+/**
+ * @brief   Set mode interface
+ *
+ * @param[in] dev      Pointer to the tja1042 descriptor
+ * @param[in] mode     mode to set
+ *
+ * @return  0 on success
+ * @return -1 on error
+ */
+int tja1042_trx_set_mode(can_trx_t *dev, can_trx_mode_t mode);
+
+/**
+ * @brief   Initialize the given tja1042
+ *
+ * @param[in] dev      Pointer to the tja1042 descriptor
+ *
+ * @return  0 on success
+ * @return -1 on error
+ */
+int tja1042_trx_init(can_trx_t *dev);
+
+/**
+ * @brief   tja1042 driver
+ */
+extern const trx_driver_t tja1042_driver;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* TJA1042_H */
+/** @} */

drivers/tja1042/Makefile

@@ -0,0 +1 @@
+include $(RIOTBASE)/Makefile.base

drivers/tja1042/tja1042.c

@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2016-2018  OTA keys S.A.
+ *
+ * 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.
+ */
+
+/**
+ * @ingroup     drivers_tja1042
+ * @{
+ *
+ * @file
+ * @brief       generic CAN transceiver implementation for tja1042
+ *
+ * @author      Aurelien Gonce <aurelien.gonce@altran.com>
+ * @author      Vincent Dupont <vincent@otakeys.com>
+ *
+ * @}
+ */
+
+#include <assert.h>
+
+#define ENABLE_DEBUG (0)
+#include "debug.h"
+
+#include "tja1042.h"
+
+int tja1042_trx_set_mode(can_trx_t *dev, can_trx_mode_t mode)
+{
+    tja1042_trx_t *tja1042 = (tja1042_trx_t *)dev;
+    int ret;
+
+    DEBUG("tja1042_trx_set_mode: dev=%p, mode=%d\n", (void *)dev, (int)mode);
+
+    switch (mode) {
+    case TRX_NORMAL_MODE:
+    case TRX_SILENT_MODE:
+        gpio_clear(tja1042->stb_pin);
+        ret = 0;
+        break;
+
+    case TRX_SLEEP_MODE:
+        gpio_set(tja1042->stb_pin);
+        ret = 0;
+        break;
+
+    default:
+        ret = -1;
+        break;
+    }
+
+    return ret;
+}
+
+int tja1042_trx_init(can_trx_t *dev)
+{
+    assert(dev != NULL);
+
+    tja1042_trx_t *tja1042 = (tja1042_trx_t *)dev;
+
+    gpio_init(tja1042->stb_pin, GPIO_OUT);
+    tja1042_trx_set_mode(dev, TRX_NORMAL_MODE);
+
+    return 0;
+}
+
+const trx_driver_t tja1042_driver = {
+    .init = tja1042_trx_init,
+    .set_mode = tja1042_trx_set_mode,
+};