-/*
- * gio.c
+/* Copyright (C) 2013-2015 Czech Technical University in Prague
+ * Authors:
+ * - Michal Horn <hornmich@fel.cvut.cz>
+ * - Michal Sojka <sojkam1@fel.cvut.cz>
+ *
+ * This document contains proprietary information belonging to Czech
+ * Technical University in Prague. Passing on and copying of this
+ * document, and communication of its contents is not permitted
+ * without prior written authorization.
*
- * Created on: 29.10.2014
- * Author: Michal Horn
*/
+#include "base.h"
#include "rpp/gio.h"
+#include "drv/gio_tab.h"
+#include "rpp/mutex.h"
+
+RPP_MUTEX_DEFINE(mutex_gio);
+
+static uint32_t ports_initialized = 0;
-static boolean_t gioa_initialized = FALSE;
-static boolean_t giob_initialized = FALSE;
-static boolean_t nhet_initialized = FALSE;
+/* Configuration consistency check */
+STATIC_ASSERT(RPP_GIO_PORT_GIOA == (1 << GIO_PORT_GIOA) &&
+ RPP_GIO_PORT_GIOB == (1 << GIO_PORT_GIOB) &&
+ RPP_GIO_PORT_NHET1 == (1 << GIO_PORT_HET1),
+ Port_configuration_is_not_consistent);
-int8_t rpp_gio_init(uint32_t ports)
+int8_t rpp_gio_init(uint32_t init_ports)
{
- uint8_t pin = 0;
-
- if (ports & RPP_GIO_PORT_GIOA && !gioa_initialized) {
- gioREG->GCR0 = 1; // Bring GIO out of reset
- for (pin = PIN_MAP_GIOA_BEGIN; pin <= PIN_MAP_GIOA_END; pin++) {
- hal_gpio_pin_conf(pin_map[pin].pin_desc);
- }
- gioa_initialized = TRUE;
- }
+ enum pin_name pin;
+ if (!RPP_MUTEX_INIT(mutex_gio))
+ return FAILURE;
- if (ports & RPP_GIO_PORT_GIOB && !giob_initialized) {
- gioREG->GCR0 = 1; // Bring GIO out of reset
- for (pin = PIN_MAP_GIOB_BEGIN; pin <= PIN_MAP_GIOB_END; pin++) {
- hal_gpio_pin_conf(pin_map[pin].pin_desc);
- }
- giob_initialized = TRUE;
- }
+ gioREG->GCR0 = 1; // Bring GIO out of reset
- if (ports & RPP_GIO_PORT_NHET1 && nhet_initialized) {
- for (pin = PIN_MAP_HET1_BEGIN; pin <= PIN_MAP_HET1_END; pin++) {
- hal_gpio_pin_conf(pin_map[pin].pin_desc);
- }
- nhet_initialized = TRUE;
+ for (pin = (enum pin_name)0; pin < _PIN_COUNT; pin++) {
+ int port_num = gio_port(gio_table[pin].pin_dsc);
+ if ((init_ports & (1 << port_num)) &&
+ !(ports_initialized & (1 << port_num)))
+ gio_setup(gio_table[pin].pin_dsc);
}
+ ports_initialized |= init_ports;
+
+ return SUCCESS;
+}
+
+int8_t rpp_gio_set(enum pin_name pin, boolean_t value)
+{
+ if (ports_initialized == 0 || pin >= _PIN_COUNT || pin < 0)
+ return FAILURE;
+
+ gio_tab_set(pin, value); /* Thread safe */
+ return SUCCESS;
+}
+
+int8_t rpp_gio_get(enum pin_name pin)
+{
+ if (ports_initialized == 0 || pin >= _PIN_COUNT || pin < 0)
+ return FAILURE;
+
+ boolean_t ret_val = gio_tab_get(pin) ? 1 : 0; /* Thread safe */
+
+ return ret_val;
+}
+
+int8_t rpp_gio_setup(enum pin_name pin, enum rpp_gio_io io, enum rpp_gio_in_mode in_mode,
+ boolean_t open_drain)
+{
+ if (ports_initialized == 0 || pin >= _PIN_COUNT || pin < 0)
+ return FAILURE;
+
+ uint32_t mode_flags[] = {
+ [RPP_GIO_MODE_PULLDIS] = GIO_PIN_CONF_MODE_PDIS,
+ [RPP_GIO_MODE_PULLUP] = GIO_PIN_CONF_MODE_PU | GIO_PIN_CONF_MODE_PEN,
+ [RPP_GIO_MODE_PULLDOWN] = GIO_PIN_CONF_MODE_PD | GIO_PIN_CONF_MODE_PEN,
+ };
+ uint32_t dsc = gio_table[pin].pin_dsc & ~GIO_PIN_CONF_MASK;
+ dsc |= (io == RPP_GIO_OUT) ? GIO_PIN_CONF_DIR_OUT : GIO_PIN_CONF_DIR_IN;
+ dsc |= mode_flags[in_mode];
+ dsc |= open_drain ? GIO_PIN_CONF_OD_ON : GIO_PIN_CONF_OD_OFF;
+
+ RPP_MUTEX_LOCK(mutex_gio);
+ gio_setup(dsc);
+ RPP_MUTEX_UNLOCK(mutex_gio);
+
return SUCCESS;
}