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//==========================================================================
//
// vnc_mouse.c
//
//
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later
// version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License
// along with eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): Chris Garry <cgarry@sweeneydesign.co.uk>
// Contributors:
// Date: 2003-08-22
// Purpose:
// Description: mouse driver for the VNC serevr
//
//####DESCRIPTIONEND####
//
//========================================================================*/
#include <cyg/kernel/kapi.h>
#include <cyg/infra/diag.h> /* diag_printf */
#include <cyg/hal/hal_io.h>
#include <cyg/hal/hal_arch.h>
#include <cyg/hal/drv_api.h>
#include <cyg/hal/hal_intr.h>
#include <cyg/infra/cyg_type.h>
#include <cyg/infra/cyg_ass.h>
#include <cyg/fileio/fileio.h> /*select() functionality */
#include <cyg/io/devtab.h>
#include <pkgconf/vnc_server.h>
/* Local function prototypes */
static Cyg_ErrNo mouse_read(cyg_io_handle_t handle,
void *buffer,
cyg_uint32 *len);
static cyg_bool mouse_select(cyg_io_handle_t handle,
cyg_uint32 which,
cyg_addrword_t info);
static Cyg_ErrNo mouse_set_config(cyg_io_handle_t handle,
cyg_uint32 key,
const void *buffer,
cyg_uint32 *len);
static Cyg_ErrNo mouse_get_config(cyg_io_handle_t handle,
cyg_uint32 key,
void *buffer,
cyg_uint32 *len);
static bool mouse_init(struct cyg_devtab_entry *tab);
static Cyg_ErrNo mouse_lookup(struct cyg_devtab_entry **tab,
struct cyg_devtab_entry *st,
const char *name);
CHAR_DEVIO_TABLE(vnc_mouse_handlers,
NULL, /* Unsupported write() function */
mouse_read,
mouse_select,
mouse_get_config,
mouse_set_config);
CHAR_DEVTAB_ENTRY(vnc_mouse_device,
CYGDAT_VNC_SERVER_MOUSE_NAME,
NULL, /* Base device name */
&vnc_mouse_handlers,
mouse_init,
mouse_lookup,
NULL); /* Private data pointer */
#define MAX_EVENTS CYGNUM_VNC_SERVER_MOUSE_EVENTS
static cyg_uint8 data_queue[MAX_EVENTS*8];
static int queue_put_ptr = 0;
static int queue_get_ptr = 0;
static int data_in_queue = 0;
static cyg_selinfo mouse_select_info;
static cyg_bool mouse_select_active;
static int mouse_active = 0;
/*
* Mouse event handler routine - called by main VNC server loop
* when new mouse data is received from client
*/
void vnc_mouse_handler(cyg_uint8 *data)
{
if (!mouse_active)
{
/* Mouse is not active yet - ignore incoming data */
return;
}
/* Add the single mouse event data to the data queue */
cyg_scheduler_lock();
if (data_in_queue >= (MAX_EVENTS*8))
{
diag_printf("VNC mouse driver buffer overflow\n");
cyg_scheduler_unlock();
return;
}
data_queue[queue_put_ptr] = 0; /* Button info MSB */
data_queue[queue_put_ptr+1] = data[1]; /* Button info LSB */
data_queue[queue_put_ptr+2] = data[2]; /* x-coord MSB */
data_queue[queue_put_ptr+3] = data[3]; /* x-coord LSB */
data_queue[queue_put_ptr+4] = data[4]; /* y-coord MSB */
data_queue[queue_put_ptr+5] = data[5]; /* y-coord LSB */
data_queue[queue_put_ptr+6] = 0;
data_queue[queue_put_ptr+7] = 0;
/* Increment pointer */
queue_put_ptr +=8;
if (queue_put_ptr >= (MAX_EVENTS*8))
{
queue_put_ptr = 0;
}
/* Increment count of data in queue */
data_in_queue += 8;
/* Wake up select() */
if (mouse_select_active) {
mouse_select_active = false;
cyg_selwakeup(&mouse_select_info);
}
cyg_scheduler_unlock();
}
static Cyg_ErrNo mouse_read(cyg_io_handle_t handle,
void *buffer,
cyg_uint32 *len)
{
int total; /* Total bytes to read */
cyg_uint8 *bp = (unsigned char *)buffer;
int i;
cyg_scheduler_lock(); /* Prevent interaction with mouse_handler funcion */
/* Each mouse event generates 8 x cyg_uint8 values in the queue
* 0-1: Mouse button data
* 2-3: x-coord of mouse
* 4-5: y-coord of mouse
* 6-7: always zero
*/
if (*len <= data_in_queue)
{
/* Send all requested data */
total = *len;
}
else
{
/* read() is requesting more data than there is in the queue */
/* Send all data from the queue */
total = data_in_queue;
}
for (i = 0; i < total; i++)
{
bp[i] = data_queue[queue_get_ptr];
if (++queue_get_ptr >= (MAX_EVENTS*8))
{
queue_get_ptr = 0;
}
}
data_in_queue -= total;
cyg_scheduler_unlock(); // Allow DSRs again
*len = total;
return ENOERR;
}
static cyg_bool mouse_select(cyg_io_handle_t handle,
cyg_uint32 which,
cyg_addrword_t info)
{
if (which == CYG_FREAD) {
cyg_scheduler_lock();
if (data_in_queue >= 8) {
cyg_scheduler_unlock();
return true;
}
if (!mouse_select_active) {
mouse_select_active = true;
cyg_selrecord(info, &mouse_select_info);
}
cyg_scheduler_unlock();
}
return false;
}
static Cyg_ErrNo mouse_set_config(cyg_io_handle_t handle,
cyg_uint32 key,
const void *buffer,
cyg_uint32 *len)
{
return EINVAL;
}
static Cyg_ErrNo mouse_get_config(cyg_io_handle_t handle,
cyg_uint32 key,
void *buffer,
cyg_uint32 *len)
{
return EINVAL;
}
static bool mouse_init(struct cyg_devtab_entry *tab)
{
cyg_selinit(&mouse_select_info);
return true;
}
static Cyg_ErrNo mouse_lookup(struct cyg_devtab_entry **tab,
struct cyg_devtab_entry *st,
const char *name)
{
mouse_active = 1;
return ENOERR;
}
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