--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cs/services/tty/tty.c	Fri Oct 16 06:23:26 2020 +0000
@@ -0,0 +1,259 @@
+/****************************************************************************/
+/*                                                                          */
+/*  File Name:  tty.c                                                       */
+/*                                                                          */
+/*  Purpose:  This file contains all the functions used to manage the       */
+/*            TTY feature.                                                  */
+/*                                                                          */
+/*  Version   0.1                                                           */
+/*                                                                          */
+/*  Date        Modification                                                */
+/*  ------------------------------------                                    */
+/*  18 Jan 2003 Create                                                      */
+/*                                                                          */
+/*  Author                                                                  */
+/*     Frederic Turgis                                                      */
+/*                                                                          */
+/* (C) Copyright 2003 by Texas Instruments Incorporated, All Rights Reserved*/
+/****************************************************************************/
+
+#ifndef _WINDOWS
+  #include "config/l1sw.cfg"
+#endif
+
+#if (L1_GTT == 1)
+
+  #include "tty/tty_api.h"
+  #include "tty/tty_i.h"
+
+  #include "rv/rv_general.h"
+  #include "rvf/rvf_target.h"
+
+  #include "l1gtt_signa.h"
+  #include "audio/audio_structs_i.h"
+  #include "audio/audio_const_i.h"
+
+  /* extern variables & prototypes */
+
+  extern T_TTY_ENV_CTRL_BLK *tty_env_ctrl_blk_p;
+  extern T_AUDIO_ENV_CTRL_BLK *p_audio_gbl_var;
+
+  extern void    *audio_allocate_l1_message (UINT16 size);
+  extern T_RV_RET audio_send_l1_message     (INT16 message_id, void *message);
+
+  /********************************************************************************/
+  /*                                                                              */
+  /*    Function Name:   tty_send_status                                          */
+  /*                                                                              */
+  /*    Purpose:  This function sends the TTY status to the entity.               */
+  /*                                                                              */
+  /*    Input Parameters:                                                         */
+  /*        status,                                                               */
+  /*        return path                                                           */
+  /*                                                                              */
+  /*    Output Parameters:                                                        */
+  /*        None.                                                                 */
+  /*                                                                              */
+  /*    Note:                                                                     */
+  /*        None.                                                                 */
+  /*                                                                              */
+  /*    Revision History:                                                         */
+  /*        None.                                                                 */
+  /*                                                                              */
+  /********************************************************************************/
+  void tty_send_status (T_AUDIO_RET status, T_RV_RETURN return_path)
+  {
+    T_AUDIO_TTY_STATUS *p_send_message = NULL;
+    T_RVF_MB_STATUS mb_status = RVF_RED;
+
+    while (mb_status == RVF_RED)
+    {
+      /* allocate the message buffer */
+      mb_status = rvf_get_buf (p_audio_gbl_var->mb_external,
+                               sizeof (T_AUDIO_TTY_STATUS),
+                               (T_RVF_BUFFER **) (&p_send_message));
+
+      /* If insufficient resources, then report a memory error and abort. */
+      /* and wait until more ressource is given */
+      if (mb_status == RVF_RED)
+      {
+        TTY_SEND_TRACE("TTY: Not Enough Memory (Red!) ",RV_TRACE_LEVEL_ERROR);
+        rvf_delay(RVF_MS_TO_TICKS(1000));
+      }
+    }
+    /* fill the header of the message */
+    ((T_AUDIO_TTY_STATUS *)p_send_message)->os_hdr.msg_id = AUDIO_TTY_STATUS_MSG;
+
+    /* fill the status parameters */
+    ((T_AUDIO_TTY_STATUS *)p_send_message)->status = status;
+
+    if (return_path.callback_func == NULL)
+    {
+      /* send the message to the entity */
+      rvf_send_msg (return_path.addr_id, p_send_message);
+    }
+    else
+    {
+      /* call the callback function */
+      (*return_path.callback_func)((void *)(p_send_message));
+      rvf_free_buf((T_RVF_BUFFER *)p_send_message);
+    }
+  }
+
+  /********************************************************************************/
+  /*                                                                              */
+  /*    Function Name:   tty_manager                                              */
+  /*                                                                              */
+  /*    Purpose:  This function is called to manage TTY                           */
+  /*                                                                              */
+  /*    Input Parameters:                                                         */
+  /*        message                                                               */
+  /*                                                                              */
+  /*    Output Parameters:                                                        */
+  /*        None.                                                                 */
+  /*                                                                              */
+  /*    Note:                                                                     */
+  /*        None.                                                                 */
+  /*                                                                              */
+  /*    Revision History:                                                         */
+  /*        None.                                                                 */
+  /*                                                                              */
+  /********************************************************************************/
+  void tty_manager (T_RV_HDR *p_message)
+  {
+    /* Declare local variables. */
+    void *p_send_message;
+
+    /**************** tty_manager function begins *********************/
+    switch(tty_env_ctrl_blk_p->state)
+    {
+      case TTY_IDLE:
+      {
+        switch(p_message->msg_id)
+        {
+          case TTY_START_REQ:
+          {
+            /* save the return path */
+            tty_env_ctrl_blk_p->return_path.callback_func = ((T_TTY_START *)p_message)->return_path.callback_func;
+            tty_env_ctrl_blk_p->return_path.addr_id       = ((T_TTY_START *)p_message)->return_path.addr_id;
+
+            /* allocate the buffer for the message to the L1 */
+            p_send_message = audio_allocate_l1_message(0);
+            if (p_send_message != NULL)
+            {
+              /* send the start command to the audio L1 */
+              audio_send_l1_message(MMI_GTT_START_REQ, p_send_message);
+            }
+
+            /* change state */
+            tty_env_ctrl_blk_p->state = TTY_WAIT_START_CON;
+          }
+          break;
+          case TTY_STOP_REQ:
+          {
+            TTY_SEND_TRACE("TTY: STOP ERROR EVENT ",RV_TRACE_LEVEL_ERROR);
+          }
+          break;
+        }
+      } /* case TTY_IDLE */
+      break;
+
+      case TTY_WAIT_START_CON:
+      {
+        switch(p_message->msg_id)
+        {
+          case MMI_GTT_START_CON:
+          {
+            /* change state */
+            tty_env_ctrl_blk_p->state = TTY_WAIT_STOP_COMMAND;
+          }
+          break;
+          case TTY_STOP_REQ:
+          {
+            /* change state */
+            tty_env_ctrl_blk_p->state = TTY_WAIT_START_CON_TO_STOP;
+          }
+          break;
+        }
+      } /* case TTY_WAIT_START_CON */
+      break;
+
+      case TTY_WAIT_START_CON_TO_STOP:
+      {
+        switch(p_message->msg_id)
+        {
+          case MMI_GTT_START_CON:
+          {
+            /* send the stop command to the audio L1 */
+            p_send_message = audio_allocate_l1_message(0);
+            if (p_send_message != NULL)
+            {
+              audio_send_l1_message(MMI_GTT_STOP_REQ, p_send_message);
+            }
+
+            /* change state */
+            tty_env_ctrl_blk_p->state = TTY_WAIT_STOP_CON;
+          }
+          break;
+          case TTY_STOP_REQ:
+          {
+            TTY_SEND_TRACE("TTY: STOP ERROR EVENT ",RV_TRACE_LEVEL_ERROR);
+          }
+          break;
+        }
+      }
+      break;
+
+      case TTY_WAIT_STOP_COMMAND:
+      {
+        switch(p_message->msg_id)
+        {
+          case TTY_STOP_REQ:
+          {
+            /* send the stop command to the audio L1 */
+            p_send_message = audio_allocate_l1_message(0);
+            if (p_send_message != NULL)
+            {
+              audio_send_l1_message(MMI_GTT_STOP_REQ, p_send_message);
+            }
+
+            /* change state */
+            tty_env_ctrl_blk_p->state = TTY_WAIT_STOP_CON;
+          }
+          break;
+          case MMI_GTT_STOP_CON:
+          {
+            tty_send_status (AUDIO_OK, tty_env_ctrl_blk_p->return_path);
+
+            /* change state */
+            tty_env_ctrl_blk_p->state = TTY_IDLE;
+          }
+          break;
+        }
+      } /* case TTY_WAIT_STOP_COMMAND */
+      break;
+
+      case TTY_WAIT_STOP_CON:
+      {
+        switch(p_message->msg_id)
+        {
+          case MMI_GTT_STOP_CON:
+          {
+            tty_send_status (AUDIO_OK, tty_env_ctrl_blk_p->return_path);
+
+            /* change state */
+            tty_env_ctrl_blk_p->state = TTY_IDLE;
+          }
+          break;
+          case TTY_STOP_REQ:
+          {
+            TTY_SEND_TRACE("TTY: STOP ERROR EVENT ",RV_TRACE_LEVEL_ERROR);
+          }
+          break;
+        }
+      } /* case TTY_WAIT_STOP_CON */
+      break;
+
+    } /* switch(tty_env_ctrl_blk_p->state) */
+  }
+#endif /* L1_GTT */