nimble/drivers: Add driver for SKY66405 FEM

nimble/drivers/fem/sky66405/include/sky66405/sky66405.h

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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+
+#ifndef _SKY66405_H
+#define _SKY66405_H
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void sky66405_rx_bypass(uint8_t enabled);
+void sky66405_tx_bypass(uint8_t enabled);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SKY66405_H */

nimble/drivers/fem/sky66405/pkg.yml

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+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+pkg.name: nimble/drivers/fem/sky66405
+pkg.description: Driver for SKY66405 front-end module
+pkg.author: "Apache Mynewt <dev@mynewt.apache.org>"
+pkg.homepage: "https://mynewt.apache.org/"
+pkg.apis:
+    - ble_fem_pa
+    - ble_fem_lna
+pkg.deps:
+    - nimble/controller
+
+pkg.init:
+    sky66405_init: 999

nimble/drivers/fem/sky66405/src/sky66405.c

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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#include <syscfg/syscfg.h>
+#include <hal/hal_gpio.h>
+#include <controller/ble_fem.h>
+#include <sky66405/sky66405.h>
+
+static struct {
+    uint8_t rx_bypass : 1;
+    uint8_t tx_bypass : 1;
+} sky66405_config = {
+    .rx_bypass = MYNEWT_VAL(SKY66405_RX_BYPASS),
+    .tx_bypass = MYNEWT_VAL(SKY66405_TX_BYPASS),
+};
+
+static void
+sky66405_bypass(uint8_t enabled)
+{
+    /* this is called only if bypass is enabled which means CPS PIN is
+     * correctly set and there is no need to check it here.
+     */
+    hal_gpio_write(MYNEWT_VAL(SKY66405_PIN_CPS), enabled);
+}
+
+void
+ble_fem_pa_init(void)
+{
+    sky66405_tx_bypass(0);
+}
+
+void
+ble_fem_pa_enable(void)
+{
+    if (sky66405_config.tx_bypass) {
+        sky66405_bypass(1);
+    }
+}
+
+void
+ble_fem_pa_disable(void)
+{
+    if (sky66405_config.tx_bypass) {
+        sky66405_bypass(0);
+    }
+}
+
+void
+ble_fem_lna_init(void)
+{
+    sky66405_rx_bypass(0);
+}
+
+void
+ble_fem_lna_enable(void)
+{
+    if (sky66405_config.rx_bypass) {
+        sky66405_bypass(1);
+    }
+}
+
+void
+ble_fem_lna_disable(void)
+{
+    if (sky66405_config.rx_bypass) {
+        sky66405_bypass(0);
+    }
+}
+
+void
+sky66405_rx_bypass(uint8_t enabled)
+{
+    int pin = MYNEWT_VAL(SKY66405_PIN_CPS);
+
+    if (pin >= 0) {
+        sky66405_config.rx_bypass = enabled;
+        sky66405_bypass(enabled);
+    }
+}
+
+void
+sky66405_tx_bypass(uint8_t enabled)
+{
+    int pin = MYNEWT_VAL(SKY66405_PIN_CPS);
+
+    if (pin >= 0) {
+        sky66405_config.tx_bypass = enabled;
+        sky66405_bypass(enabled);
+    }
+}
+
+void
+sky66405_init(void)
+{
+    int pin;
+
+    /* Disable bypass, we'll enable it when needed */
+    pin = MYNEWT_VAL(SKY66405_PIN_CPS);
+    if (pin >= 0) {
+        hal_gpio_init_out(pin, 0);
+    }
+}

nimble/drivers/fem/sky66405/syscfg.yml

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+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+syscfg.defs:
+    SKY66405_PIN_CPS:
+        description: >
+            GPIO pin number to control CPS signal.
+            When set to '-1', pin state will not be changed and it should be
+            driven externally.
+        value: -1
+    SKY66405_TX_BYPASS:
+        description: >
+            Enables bypass for TX which effectively disables operation as PA.
+            Only valid if CPS signal is controller by driver.
+        value: 0
+    SKY66405_RX_BYPASS:
+        description: >
+            Enables bypass for RX which effectively disables operation as PA.
+            Only valid if CPS signal is controller by driver.
+        value: 0
+
+syscfg.vals.!BLE_FEM_PA:
+    # Enable TX bypass by default if PA is disabled
+    SKY66405_TX_BYPASS: 1
+
+syscfg.vals.!BLE_FEM_LNA:
+    # Enable RX bypass by default if LNA is disabled
+    SKY66405_RX_BYPASS: 1