termios: Add <rtems/termiosdevice.h>

Add <rtems/termiosdevice.h> which does not depend on <rtems/libio.h> to
provide rtems_termios_device_context and rtems_termios_device_handler.
For polled serial device drivers, this removes a header file dependency
to the full file system support.

7 files changed, 314 insertions, 247 deletions

diff --git a/bsps/arm/xilinx-zynq/console/console-init.c b/bsps/arm/xilinx-zynq/console/console-init.c
index 5eb69dc224..72fa27da11 100644
--- a/bsps/arm/xilinx-zynq/console/console-init.c
+++ b/bsps/arm/xilinx-zynq/console/console-init.c
@@ -26,6 +26,7 @@
  */
 
 #include <rtems/console.h>
+#include <rtems/termiostypes.h>
 
 #include <bsp.h>
 #include <dev/serial/zynq-uart.h>
diff --git a/bsps/include/dev/serial/zynq-uart.h b/bsps/include/dev/serial/zynq-uart.h
index 245c6d2afc..e7854af5f1 100644
--- a/bsps/include/dev/serial/zynq-uart.h
+++ b/bsps/include/dev/serial/zynq-uart.h
@@ -34,7 +34,7 @@
 #ifndef LIBBSP_ARM_XILINX_ZYNQ_UART_H
 #define LIBBSP_ARM_XILINX_ZYNQ_UART_H
 
-#include <rtems/termiostypes.h>
+#include <rtems/termiosdevice.h>
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/bsps/shared/dev/serial/zynq-uart.c b/bsps/shared/dev/serial/zynq-uart.c
index 10e5d2acff..390ee1f527 100644
--- a/bsps/shared/dev/serial/zynq-uart.c
+++ b/bsps/shared/dev/serial/zynq-uart.c
@@ -28,6 +28,7 @@
 #include <dev/serial/zynq-uart.h>
 #include <dev/serial/zynq-uart-regs.h>
 #include <bsp/irq.h>
+#include <rtems/termiostypes.h>
 
 #include <bspopts.h>
 
diff --git a/cpukit/include/rtems/libio.h b/cpukit/include/rtems/libio.h
index cb0e6879a9..6898168aa6 100644
--- a/cpukit/include/rtems/libio.h
+++ b/cpukit/include/rtems/libio.h
@@ -1360,7 +1360,7 @@ typedef struct {
 /**
  * @brief Parameter block for open/close.
  */
-typedef struct {
+typedef struct rtems_libio_open_close_args {
   rtems_libio_t          *iop;
   uint32_t                flags;
   uint32_t                mode;
diff --git a/cpukit/include/rtems/termiosdevice.h b/cpukit/include/rtems/termiosdevice.h
new file mode 100644
index 0000000000..17d05e61f6
--- /dev/null
+++ b/cpukit/include/rtems/termiosdevice.h
@@ -0,0 +1,300 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @ingroup TermiostypesSupport
+ *
+ * @brief This header file provides the interfaces of the
+ *   @ref TermiostypesSupport.
+ */
+
+/*
+ * Copyright (C) 2014, 2017 embedded brains GmbH & Co. KG
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RTEMS_TERMIOSDEVICE_H
+#define _RTEMS_TERMIOSDEVICE_H
+
+#include <rtems/thread.h>
+#include <rtems/rtems/intr.h>
+
+#include <sys/ioccom.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+struct rtems_libio_open_close_args;
+struct rtems_termios_tty;
+struct termios;
+
+/**
+ * @defgroup TermiostypesSupport RTEMS Termios Device Support
+ *
+ * @ingroup libcsupport
+ *
+ * @brief This group contains the Termios Device Support provided by RTEMS.
+ */
+
+/**
+ * @brief Termios device context.
+ *
+ * @see RTEMS_TERMIOS_DEVICE_CONTEXT_INITIALIZER(),
+ * rtems_termios_device_context_initialize() and
+ * rtems_termios_device_install().
+ */
+typedef struct rtems_termios_device_context {
+  union {
+    /* Used for TERMIOS_POLLED and TERMIOS_IRQ_DRIVEN */
+    rtems_interrupt_lock interrupt;
+
+    /* Used for TERMIOS_IRQ_SERVER_DRIVEN and TERMIOS_TASK_DRIVEN */
+    rtems_mutex mutex;
+  } lock;
+
+  void ( *lock_acquire )(
+    struct rtems_termios_device_context *,
+    rtems_interrupt_lock_context *
+  );
+
+  void ( *lock_release )(
+    struct rtems_termios_device_context *,
+    rtems_interrupt_lock_context *
+  );
+} rtems_termios_device_context;
+
+typedef enum {
+  TERMIOS_POLLED,
+  TERMIOS_IRQ_DRIVEN,
+  TERMIOS_TASK_DRIVEN,
+  TERMIOS_IRQ_SERVER_DRIVEN
+} rtems_termios_device_mode;
+
+/**
+ * @brief Termios device handler.
+ *
+ * @see rtems_termios_device_install().
+ */
+typedef struct {
+  /**
+   * @brief First open of this device.
+   *
+   * @param[in] tty The Termios control.  This parameter may be passed to
+   *   interrupt service routines since it must be provided for the
+   *   rtems_termios_enqueue_raw_characters() and
+   *   rtems_termios_dequeue_characters() functions.
+   * @param[in] context The Termios device context.
+   * @param[in] term The current Termios attributes.
+   * @param[in] args The open/close arguments.  This is parameter provided to
+   *   support legacy drivers.  It must not be used by new drivers.
+   *
+   * @retval true Successful operation.
+   * @retval false Cannot open device.
+   *
+   * @see rtems_termios_get_device_context() and rtems_termios_set_best_baud().
+   */
+  bool (*first_open)(
+    struct rtems_termios_tty           *tty,
+    rtems_termios_device_context       *context,
+    struct termios                     *term,
+    struct rtems_libio_open_close_args *args
+  );
+
+  /**
+   * @brief Last close of this device.
+   *
+   * @param[in] tty The Termios control.
+   * @param[in] context The Termios device context.
+   * @param[in] args The open/close arguments.  This is parameter provided to
+   *   support legacy drivers.  It must not be used by new drivers.
+   */
+  void (*last_close)(
+    struct rtems_termios_tty           *tty,
+    rtems_termios_device_context       *context,
+    struct rtems_libio_open_close_args *args
+  );
+
+  /**
+   * @brief Polled read.
+   *
+   * In case mode is TERMIOS_IRQ_DRIVEN, TERMIOS_IRQ_SERVER_DRIVEN or
+   * TERMIOS_TASK_DRIVEN, then data is received via
+   * rtems_termios_enqueue_raw_characters().
+   *
+   * @param[in] context The Termios device context.
+   *
+   * @retval char The received data encoded as unsigned char.
+   * @retval -1 No data currently available.
+   */
+  int (*poll_read)(rtems_termios_device_context *context);
+
+  /**
+   * @brief Polled write in case mode is TERMIOS_POLLED or write support
+   * otherwise.
+   *
+   * @param[in] context The Termios device context.
+   * @param[in] buf The output buffer.
+   * @param[in] len The output buffer length in characters.
+   */
+  void (*write)(
+    rtems_termios_device_context *context,
+    const char *buf,
+    size_t len
+  );
+
+  /**
+   * @brief Set attributes after a Termios settings change.
+   *
+   * @param[in] context The Termios device context.
+   * @param[in] term The new Termios attributes.
+   *
+   * @retval true Successful operation.
+   * @retval false Invalid attributes.
+   */
+  bool (*set_attributes)(
+    rtems_termios_device_context *context,
+    const struct termios         *term
+  );
+
+  /**
+   * @brief IO control handler.
+   *
+   * Invoked in case the Termios layer cannot deal with the IO request.
+   *
+   * @param[in] context The Termios device context.
+   * @param[in] request The IO control request.
+   * @param[in] buffer The IO control buffer.
+   */
+  int (*ioctl)(
+    rtems_termios_device_context *context,
+    ioctl_command_t               request,
+    void                         *buffer
+  );
+
+  /**
+   * @brief Termios device mode.
+   */
+  rtems_termios_device_mode mode;
+} rtems_termios_device_handler;
+
+/**
+ * @brief Termios device flow control handler.
+ *
+ * @see rtems_termios_device_install().
+ */
+typedef struct {
+  /**
+   * @brief Indicate to stop remote transmitter.
+   *
+   * @param[in] context The Termios device context.
+   */
+  void (*stop_remote_tx)(rtems_termios_device_context *context);
+
+  /**
+   * @brief Indicate to start remote transmitter.
+   *
+   * @param[in] context The Termios device context.
+   */
+  void (*start_remote_tx)(rtems_termios_device_context *context);
+} rtems_termios_device_flow;
+
+void rtems_termios_device_lock_acquire_default(
+  rtems_termios_device_context *ctx,
+  rtems_interrupt_lock_context *lock_context
+);
+
+void rtems_termios_device_lock_release_default(
+  rtems_termios_device_context *ctx,
+  rtems_interrupt_lock_context *lock_context
+);
+
+/**
+ * @brief Initializes a device context.
+ *
+ * @param[in] context The Termios device context.
+ * @param[in] name The name for the interrupt lock.  This name must be a
+ *   string persistent throughout the life time of this lock.  The name is only
+ *   used if profiling is enabled.
+ */
+static inline void rtems_termios_device_context_initialize(
+  rtems_termios_device_context *context,
+  const char                   *name
+)
+{
+  rtems_interrupt_lock_initialize( &context->lock.interrupt, name );
+  context->lock_acquire = rtems_termios_device_lock_acquire_default;
+  context->lock_release = rtems_termios_device_lock_release_default;
+}
+
+/**
+ * @brief Initializer for static initialization of Termios device contexts.
+ *
+ * @param name The name for the interrupt lock.  It must be a string.  The name
+ *   is only used if profiling is enabled.
+ */
+#define RTEMS_TERMIOS_DEVICE_CONTEXT_INITIALIZER( name ) \
+  { \
+    { RTEMS_INTERRUPT_LOCK_INITIALIZER( name ) }, \
+    rtems_termios_device_lock_acquire_default, \
+    rtems_termios_device_lock_release_default \
+  }
+
+/**
+ * @brief Acquires the device lock.
+ *
+ * @param[in] context The device context.
+ * @param[in] lock_context The local interrupt lock context for an acquire and
+ *   release pair.
+ */
+static inline void rtems_termios_device_lock_acquire(
+  rtems_termios_device_context *context,
+  rtems_interrupt_lock_context *lock_context
+)
+{
+  ( *context->lock_acquire )( context, lock_context );
+}
+
+/**
+ * @brief Releases the device lock.
+ *
+ * @param[in] context The device context.
+ * @param[in] lock_context The local interrupt lock context for an acquire and
+ *   release pair.
+ */
+static inline void rtems_termios_device_lock_release(
+  rtems_termios_device_context *context,
+  rtems_interrupt_lock_context *lock_context
+)
+{
+  ( *context->lock_release )( context, lock_context );
+}
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* _RTEMS_TERMIOSDEVICE_H */
diff --git a/cpukit/include/rtems/termiostypes.h b/cpukit/include/rtems/termiostypes.h
index 67f3461b1f..5cf418a5eb 100644
--- a/cpukit/include/rtems/termiostypes.h
+++ b/cpukit/include/rtems/termiostypes.h
@@ -39,8 +39,7 @@
 #include <rtems/libio.h>
 #include <rtems/assoc.h>
 #include <rtems/chain.h>
-#include <rtems/thread.h>
-#include <sys/ioccom.h>
+#include <rtems/termiosdevice.h>
 #include <stdint.h>
 #include <termios.h>
 
@@ -49,11 +48,9 @@ extern "C" {
 #endif
 
 /**
- *  @defgroup TermiostypesSupport RTEMS Termios Device Support
+ * @addtogroup TermiostypesSupport
  *
- *  @ingroup libcsupport
- *
- *  @brief RTEMS Termios Device Support Internal Data Structures
+ * @{
  */
 
 /*
@@ -75,211 +72,6 @@ struct rtems_termios_rawbuf {
   rtems_binary_semaphore Semaphore;
 };
 
-typedef enum {
-  TERMIOS_POLLED,
-  TERMIOS_IRQ_DRIVEN,
-  TERMIOS_TASK_DRIVEN,
-  TERMIOS_IRQ_SERVER_DRIVEN
-} rtems_termios_device_mode;
-
-struct rtems_termios_tty;
-
-/**
- * @brief Termios device context.
- *
- * @see RTEMS_TERMIOS_DEVICE_CONTEXT_INITIALIZER(),
- * rtems_termios_device_context_initialize() and
- * rtems_termios_device_install().
- */
-typedef struct rtems_termios_device_context {
-  union {
-    /* Used for TERMIOS_POLLED and TERMIOS_IRQ_DRIVEN */
-    rtems_interrupt_lock interrupt;
-
-    /* Used for TERMIOS_IRQ_SERVER_DRIVEN or TERMIOS_TASK_DRIVEN */
-    rtems_mutex mutex;
-  } lock;
-
-  void ( *lock_acquire )(
-    struct rtems_termios_device_context *,
-    rtems_interrupt_lock_context *
-  );
-
-  void ( *lock_release )(
-    struct rtems_termios_device_context *,
-    rtems_interrupt_lock_context *
-  );
-} rtems_termios_device_context;
-
-void rtems_termios_device_lock_acquire_default(
-  rtems_termios_device_context *ctx,
-  rtems_interrupt_lock_context *lock_context
-);
-
-void rtems_termios_device_lock_release_default(
-  rtems_termios_device_context *ctx,
-  rtems_interrupt_lock_context *lock_context
-);
-
-/**
- * @brief Initializes a device context.
- *
- * @param[in] context The Termios device context.
- * @param[in] name The name for the interrupt lock.  This name must be a
- *   string persistent throughout the life time of this lock.  The name is only
- *   used if profiling is enabled.
- */
-static inline void rtems_termios_device_context_initialize(
-  rtems_termios_device_context *context,
-  const char                   *name
-)
-{
-  rtems_interrupt_lock_initialize( &context->lock.interrupt, name );
-  context->lock_acquire = rtems_termios_device_lock_acquire_default;
-  context->lock_release = rtems_termios_device_lock_release_default;
-}
-
-/**
- * @brief Initializer for static initialization of Termios device contexts.
- *
- * @param name The name for the interrupt lock.  It must be a string.  The name
- *   is only used if profiling is enabled.
- */
-#define RTEMS_TERMIOS_DEVICE_CONTEXT_INITIALIZER( name ) \
-  { \
-    { RTEMS_INTERRUPT_LOCK_INITIALIZER( name ) }, \
-    rtems_termios_device_lock_acquire_default, \
-    rtems_termios_device_lock_release_default \
-  }
-
-/**
- * @brief Termios device handler.
- *
- * @see rtems_termios_device_install().
- */
-typedef struct {
-  /**
-   * @brief First open of this device.
-   *
-   * @param[in] tty The Termios control.  This parameter may be passed to
-   *   interrupt service routines since it must be provided for the
-   *   rtems_termios_enqueue_raw_characters() and
-   *   rtems_termios_dequeue_characters() functions.
-   * @param[in] context The Termios device context.
-   * @param[in] term The current Termios attributes.
-   * @param[in] args The open/close arguments.  This is parameter provided to
-   *   support legacy drivers.  It must not be used by new drivers.
-   *
-   * @retval true Successful operation.
-   * @retval false Cannot open device.
-   *
-   * @see rtems_termios_get_device_context() and rtems_termios_set_best_baud().
-   */
-  bool (*first_open)(
-    struct rtems_termios_tty      *tty,
-    rtems_termios_device_context  *context,
-    struct termios                *term,
-    rtems_libio_open_close_args_t *args
-  );
-
-  /**
-   * @brief Last close of this device.
-   *
-   * @param[in] tty The Termios control.
-   * @param[in] context The Termios device context.
-   * @param[in] args The open/close arguments.  This is parameter provided to
-   *   support legacy drivers.  It must not be used by new drivers.
-   */
-  void (*last_close)(
-    struct rtems_termios_tty      *tty,
-    rtems_termios_device_context  *context,
-    rtems_libio_open_close_args_t *args
-  );
-
-  /**
-   * @brief Polled read.
-   *
-   * In case mode is TERMIOS_IRQ_DRIVEN, TERMIOS_IRQ_SERVER_DRIVEN or
-   * TERMIOS_TASK_DRIVEN, then data is received via
-   * rtems_termios_enqueue_raw_characters().
-   *
-   * @param[in] context The Termios device context.
-   *
-   * @retval char The received data encoded as unsigned char.
-   * @retval -1 No data currently available.
-   */
-  int (*poll_read)(rtems_termios_device_context *context);
-
-  /**
-   * @brief Polled write in case mode is TERMIOS_POLLED or write support
-   * otherwise.
-   *
-   * @param[in] context The Termios device context.
-   * @param[in] buf The output buffer.
-   * @param[in] len The output buffer length in characters.
-   */
-  void (*write)(
-    rtems_termios_device_context *context,
-    const char *buf,
-    size_t len
-  );
-
-  /**
-   * @brief Set attributes after a Termios settings change.
-   *
-   * @param[in] context The Termios device context.
-   * @param[in] term The new Termios attributes.
-   *
-   * @retval true Successful operation.
-   * @retval false Invalid attributes.
-   */
-  bool (*set_attributes)(
-    rtems_termios_device_context *context,
-    const struct termios         *term
-  );
-
-  /**
-   * @brief IO control handler.
-   *
-   * Invoked in case the Termios layer cannot deal with the IO request.
-   *
-   * @param[in] context The Termios device context.
-   * @param[in] request The IO control request.
-   * @param[in] buffer The IO control buffer.
-   */
-  int (*ioctl)(
-    rtems_termios_device_context *context,
-    ioctl_command_t               request,
-    void                         *buffer
-  );
-
-  /**
-   * @brief Termios device mode.
-   */
-  rtems_termios_device_mode mode;
-} rtems_termios_device_handler;
-
-/**
- * @brief Termios device flow control handler.
- *
- * @see rtems_termios_device_install().
- */
-typedef struct {
-  /**
-   * @brief Indicate to stop remote transmitter.
-   *
-   * @param[in] context The Termios device context.
-   */
-  void (*stop_remote_tx)(rtems_termios_device_context *context);
-
-  /**
-   * @brief Indicate to start remote transmitter.
-   *
-   * @param[in] context The Termios device context.
-   */
-  void (*start_remote_tx)(rtems_termios_device_context *context);
-} rtems_termios_device_flow;
-
 /**
  * @brief Termios device node for installed devices.
  *
@@ -456,36 +248,6 @@ static inline void *rtems_termios_get_device_context(
 }
 
 /**
- * @brief Acquires the device lock.
- *
- * @param[in] context The device context.
- * @param[in] lock_context The local interrupt lock context for an acquire and
- *   release pair.
- */
-static inline void rtems_termios_device_lock_acquire(
-  rtems_termios_device_context *context,
-  rtems_interrupt_lock_context *lock_context
-)
-{
-  ( *context->lock_acquire )( context, lock_context );
-}
-
-/**
- * @brief Releases the device lock.
- *
- * @param[in] context The device context.
- * @param[in] lock_context The local interrupt lock context for an acquire and
- *   release pair.
- */
-static inline void rtems_termios_device_lock_release(
-  rtems_termios_device_context *context,
-  rtems_interrupt_lock_context *lock_context
-)
-{
-  ( *context->lock_release )( context, lock_context );
-}
-
-/**
  * @brief Sets the best baud value in the Termios control.
  *
  * The valid Termios baud values are between 0 and 460800.  The Termios baud
diff --git a/cpukit/libcsupport/src/termiosinitialize.c b/cpukit/libcsupport/src/termiosinitialize.c
index 35aa1eb955..ae80243b2a 100644
--- a/cpukit/libcsupport/src/termiosinitialize.c
+++ b/cpukit/libcsupport/src/termiosinitialize.c
@@ -1,8 +1,11 @@
 /**
- *  @file
+ * @file
  *
- *  @brief Termios Initialization
- *  @ingroup Termios
+ * @ingroup TermiostypesSupport
+ *
+ * @brief This source file contains the implementation of
+ *   rtems_termios_device_lock_acquire_default() and
+ *   rtems_termios_device_lock_release_default().
  */
 
 /*
@@ -17,7 +20,7 @@
 #include "config.h"
 #endif
 
-#include <rtems/termiostypes.h>
+#include <rtems/termiosdevice.h>
 
 void
 rtems_termios_device_lock_acquire_default(