bsps: Add Termios console driver initialization

Add a simple Termios console driver using a table for statically
registered devices used in console_initialize() and dynamic installation
via console_device_install().

c/src/lib/libbsp/Makefile.am

@@ -34,6 +34,7 @@ include_bspdir = $(includedir)/bsp
 include_bsp_HEADERS =
 include_bsp_HEADERS += shared/include/default-initial-extension.h
 include_bsp_HEADERS += shared/include/fatal.h
+include_bsp_HEADERS += shared/include/console-termios.h
 
 include $(srcdir)/preinstall.am
 include $(top_srcdir)/automake/subdirs.am

c/src/lib/libbsp/preinstall.am

@@ -26,3 +26,7 @@ $(PROJECT_INCLUDE)/bsp/fatal.h: shared/include/fatal.h $(PROJECT_INCLUDE)/bsp/$(
 	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bsp/fatal.h
 PREINSTALL_FILES += $(PROJECT_INCLUDE)/bsp/fatal.h
 
+$(PROJECT_INCLUDE)/bsp/console-termios.h: shared/include/console-termios.h $(PROJECT_INCLUDE)/bsp/$(dirstamp)
+	$(INSTALL_DATA) $< $(PROJECT_INCLUDE)/bsp/console-termios.h
+PREINSTALL_FILES += $(PROJECT_INCLUDE)/bsp/console-termios.h
+

c/src/lib/libbsp/shared/console-termios-init.c

@@ -0,0 +1,101 @@
+/*
+ * Copyright (c) 2014 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#include <bsp/console-termios.h>
+#include <bsp/fatal.h>
+
+#include <rtems/console.h>
+
+static rtems_interrupt_lock console_lock =
+  RTEMS_INTERRUPT_LOCK_INITIALIZER( "console" );
+
+static rtems_device_major_number console_major = UINT32_MAX;
+
+static rtems_device_minor_number console_minor;
+
+rtems_status_code console_device_install(
+  const char                         *device_file,
+  const rtems_termios_device_handler *handler,
+  const rtems_termios_device_flow    *flow,
+  rtems_termios_device_context       *context
+)
+{
+  rtems_interrupt_lock_context lock_context;
+  rtems_device_minor_number    minor;
+
+  rtems_interrupt_lock_acquire( &console_lock, &lock_context );
+  minor = console_minor;
+  ++console_minor;
+  rtems_interrupt_lock_release( &console_lock, &lock_context );
+
+  return rtems_termios_device_install(
+    device_file,
+    console_major,
+    minor,
+    handler,
+    flow,
+    context
+  );
+}
+
+bool console_device_probe_default(rtems_termios_device_context *context)
+{
+  (void) context;
+
+  return true;
+}
+
+rtems_device_driver console_initialize(
+  rtems_device_major_number  major,
+  rtems_device_minor_number  minor,
+  void                      *arg
+)
+{
+  bool console_device_done = false;
+
+  rtems_termios_initialize();
+
+  for ( minor = 0; minor < console_device_count; ++minor ) {
+    const console_device *ctx = &console_device_table[ minor ];
+    rtems_status_code     sc;
+
+    if ( ( *ctx->probe )( ctx->context ) ) {
+      sc = rtems_termios_device_install(
+        ctx->device_file,
+        major,
+        minor,
+        ctx->handler,
+        ctx->flow,
+        ctx->context
+      );
+      if ( sc != RTEMS_SUCCESSFUL ) {
+        bsp_fatal( BSP_FATAL_CONSOLE_INSTALL_0 );
+      }
+
+      if ( !console_device_done ) {
+        console_device_done = true;
+
+        sc = rtems_io_register_name( CONSOLE_DEVICE_NAME, major, minor );
+        if ( sc != RTEMS_SUCCESSFUL ) {
+          bsp_fatal( BSP_FATAL_CONSOLE_INSTALL_1 );
+        }
+      }
+    }
+  }
+
+  console_major = major;
+  console_minor = minor;
+
+  return RTEMS_SUCCESSFUL;
+}

c/src/lib/libbsp/shared/include/console-termios.h

@@ -0,0 +1,136 @@
+/*
+ * Copyright (c) 2014 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#ifndef BSP_CONSOLE_TERMIOS_H
+#define BSP_CONSOLE_TERMIOS_H
+
+#include <rtems/termiostypes.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * @defgroup ConsoleTermios Termios Console Driver
+ *
+ * @ingroup TermiostypesSupport
+ *
+ * @brief Console driver for Termios devices.
+ *
+ * In order to use this driver add the following lines to the Makefile.am of
+ * the BSP:
+ *
+ * @code
+ * libbsp_a_SOURCES += ../../shared/console-termios-init.c
+ * libbsp_a_SOURCES += ../../shared/console-termios.c
+ * libbsp_a_SOURCES += console/console-config.c
+ * @endcode
+ *
+ * Define the console_device_table and console_device_count in the
+ * console-config.c file of the BSP.
+ *
+ * @{
+ */
+
+/**
+ * @brief Console device probe function type.
+ *
+ * @param[in] context The Termios device context.
+ *
+ * @retval true Install this device.
+ * @retval false Otherwise.
+ */
+typedef bool (*console_device_probe)(rtems_termios_device_context *context);
+
+/**
+ * @brief Console device information.
+ */
+typedef struct {
+  /**
+   * @brief The device file path.
+   *
+   * The "/dev/console" device will be automatically installed as the first
+   * device of console_device_table with a successful probe.
+   */
+  const char *device_file;
+
+  /**
+   * @brief The device probe function.
+   */
+  console_device_probe probe;
+
+  /**
+   * @brief The Termios device handler.
+   */
+  const rtems_termios_device_handler *handler;
+
+  /**
+   * @brief The Termios device flow control handler.
+   */
+  const rtems_termios_device_flow *flow;
+
+  /**
+   * @brief The Termios device context.
+   */
+  rtems_termios_device_context *context;
+} console_device;
+
+/**
+ * @brief Installs a console device after console driver initialization.
+ *
+ * @param[in] device_file The device file path.
+ * @param[in] handler The Termios device handler.  It must be persistent
+ *   throughout the installed time of the device.
+ * @param[in] flow The Termios device flow control handler.  The device flow
+ *   control handler are optional and may be @c NULL.  If present must be
+ *   persistent throughout the installed time of the device.
+ * @param[in] context The Termios device context.  It must be persistent
+ *   throughout the installed time of the device.
+ */
+rtems_status_code console_device_install(
+  const char                         *device_file,
+  const rtems_termios_device_handler *handler,
+  const rtems_termios_device_flow    *flow,
+  rtems_termios_device_context       *context
+);
+
+/**
+ * @brief Returns true and does nothing else.
+ */
+bool console_device_probe_default(rtems_termios_device_context *context);
+
+/**
+ * @brief Table for console devices installed via console_initialize() during
+ * system initialization.
+ *
+ * It must be provided by the BSP.
+ *
+ * @see console_device_count.
+ */
+extern const console_device console_device_table[];
+
+/**
+ * @brief Count of entries in the console_device_table.
+ *
+ * It must be provided by the BSP.
+ */
+extern const size_t console_device_count;
+
+/** @{ */
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* BSP_CONSOLE_TERMIOS_H */

c/src/lib/libbsp/shared/include/fatal.h

@@ -38,6 +38,8 @@ typedef enum {
   BSP_FATAL_CONSOLE_REGISTER_DEV_0,
   BSP_FATAL_CONSOLE_REGISTER_DEV_1,
   BSP_FATAL_CONSOLE_NO_DEV,
+  BSP_FATAL_CONSOLE_INSTALL_0,
+  BSP_FATAL_CONSOLE_INSTALL_1,
 
   /* ARM fatal codes */
   BSP_ARM_A9MPCORE_FATAL_CLOCK_IRQ_INSTALL = BSP_FATAL_CODE_BLOCK(1),