android-things: Prep for peripheralmanager support

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

src/peripheralman/peripheralman_gpio.c

@@ -0,0 +1,222 @@
+/*
+ * Author: Constantin Musca <constantin.musca@intel.com>
+ * Copyright (c) 2016 Intel Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <peripheralmanager/peripheral_manager_client.h>
+#include <peripheralmanager/gpio.h>
+
+// API
+#include "mraa/gpio.h"
+
+// mraa internals
+#include "mraa_internal.h"
+
+extern BPeripheralManagerClient *client;
+extern char **gpios;
+extern int gpios_count;
+
+mraa_gpio_context
+mraa_gpio_init_raw(int pin)
+{
+    return NULL;
+}
+
+mraa_gpio_context
+mraa_gpio_init(int pin)
+{
+    mraa_gpio_context dev;
+    int rc;
+
+    if (pin > gpios_count) {
+        // invalid pin number specified
+        return NULL;
+    }
+
+    if ((dev = (mraa_gpio_context)calloc(sizeof(struct _gpio), 1)) == NULL) {
+        return NULL;
+    }
+
+    rc = BPeripheralManagerClient_openGpio(client, gpios[pin], &dev->bgpio);
+    if (rc != 0) {
+        free(dev);
+        return NULL;
+    }
+    dev->pin = pin;
+
+    return dev;
+}
+
+mraa_result_t
+mraa_gpio_close(mraa_gpio_context dev)
+{
+    if (dev->bgpio != NULL) {
+        BGpio_delete(dev->bgpio);
+    }
+
+    free(dev);
+    return MRAA_SUCCESS;
+}
+
+mraa_result_t
+mraa_gpio_dir(mraa_gpio_context dev, mraa_gpio_dir_t dir)
+{
+    int rc;
+
+    if (dev->bgpio == NULL) {
+        return MRAA_ERROR_INVALID_HANDLE;
+    }
+
+    switch (dir) {
+        case MRAA_GPIO_IN:
+            rc = BGpio_setDirection(dev->bgpio, DIRECTION_IN);
+            break;
+        case MRAA_GPIO_OUT:
+        case MRAA_GPIO_OUT_HIGH:
+            rc = BGpio_setDirection(dev->bgpio, DIRECTION_OUT_INITIALLY_HIGH);
+            break;
+        case MRAA_GPIO_OUT_LOW:
+            rc = BGpio_setDirection(dev->bgpio, DIRECTION_OUT_INITIALLY_LOW);
+            break;
+    }
+    if (rc != 0) {
+        return MRAA_ERROR_INVALID_HANDLE;
+    }
+
+    return MRAA_SUCCESS;
+}
+
+mraa_result_t
+mraa_gpio_read_dir(mraa_gpio_context dev, mraa_gpio_dir_t *dir)
+{
+    syslog(LOG_WARNING, "gpio mraa: function not implemented in PMRAA\n");
+    return MRAA_ERROR_FEATURE_NOT_IMPLEMENTED;
+}
+
+mraa_result_t
+mraa_gpio_write(mraa_gpio_context dev, int val)
+{
+    int rc;
+
+    if (dev->bgpio == NULL) {
+        return MRAA_ERROR_INVALID_HANDLE;
+    }
+
+    rc = BGpio_setValue(dev->bgpio, val);
+    if (rc != 0) {
+        return MRAA_ERROR_INVALID_RESOURCE;
+    }
+
+    return MRAA_SUCCESS;
+}
+
+int
+mraa_gpio_read(mraa_gpio_context dev)
+{
+    int rc, val;
+
+    if (dev->bgpio == NULL) {
+        return -1;
+    }
+
+    rc = BGpio_getValue(dev->bgpio, &val);
+    if (rc != 0) {
+        return -1;
+    }
+
+    return val;
+}
+
+mraa_result_t
+mraa_gpio_edge_mode(mraa_gpio_context dev, mraa_gpio_edge_t mode)
+{
+    int rc;
+
+    if (dev->bgpio == NULL) {
+        return MRAA_ERROR_INVALID_HANDLE;
+    }
+
+    switch (mode) {
+        case MRAA_GPIO_EDGE_BOTH:
+            rc = BGpio_setEdgeTriggerType(dev->bgpio, BOTH_EDGE);
+            break;
+        case MRAA_GPIO_EDGE_FALLING:
+            rc = BGpio_setEdgeTriggerType(dev->bgpio, FALLING_EDGE);
+            break;
+        case MRAA_GPIO_EDGE_RISING:
+            rc = BGpio_setEdgeTriggerType(dev->bgpio, RISING_EDGE);
+            break;
+        case MRAA_GPIO_EDGE_NONE:
+            rc = BGpio_setEdgeTriggerType(dev->bgpio, NONE_EDGE);
+            break;
+    }
+    if (rc != 0) {
+        return MRAA_ERROR_INVALID_HANDLE;
+    }
+
+    return MRAA_SUCCESS;
+};
+
+mraa_result_t
+mraa_gpio_isr(mraa_gpio_context dev, mraa_gpio_edge_t edge, void (*fptr)(void*), void* args)
+{
+    return MRAA_ERROR_FEATURE_NOT_IMPLEMENTED;
+}
+
+mraa_result_t
+mraa_gpio_isr_exit(mraa_gpio_context dev)
+{
+    return MRAA_ERROR_FEATURE_NOT_IMPLEMENTED;
+}
+
+mraa_result_t
+mraa_gpio_owner(mraa_gpio_context dev, mraa_boolean_t own)
+{
+    syslog(LOG_WARNING, "gpio mraa: function not implemented in PMRAA");
+    return MRAA_ERROR_FEATURE_NOT_IMPLEMENTED;
+}
+
+mraa_result_t
+mraa_gpio_mode(mraa_gpio_context dev, mraa_gpio_mode_t mode)
+{
+    return MRAA_ERROR_FEATURE_NOT_IMPLEMENTED;
+}
+
+mraa_result_t
+mraa_gpio_use_mmaped(mraa_gpio_context dev, mraa_boolean_t mmap_en)
+{
+    syslog(LOG_WARNING, "gpio mraa: function not implemented in PMRAA");
+    return MRAA_ERROR_FEATURE_NOT_IMPLEMENTED;
+}
+
+int
+mraa_gpio_get_pin(mraa_gpio_context dev)
+{
+    return dev->pin;
+}
+int
+mraa_gpio_get_pin_raw(mraa_gpio_context dev)
+{
+    syslog(LOG_WARNING, "mraa: function not implemented in PMRAA");
+    return -1;
+}