You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
152 lines
3.6 KiB
152 lines
3.6 KiB
|
|
/*
|
|
* IBM ASM Service Processor Device Driver
|
|
*
|
|
* This program 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 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*
|
|
* Copyright (C) IBM Corporation, 2004
|
|
*
|
|
* Author: Max Asböck <amax@us.ibm.com>
|
|
*
|
|
*/
|
|
|
|
/* Remote mouse and keyboard event handling functions */
|
|
|
|
#include "ibmasm.h"
|
|
#include "remote.h"
|
|
|
|
int ibmasm_init_remote_queue(struct service_processor *sp)
|
|
{
|
|
struct remote_queue *q = &sp->remote_queue;
|
|
|
|
disable_mouse_interrupts(sp);
|
|
|
|
q->open = 0;
|
|
q->size = 0;
|
|
|
|
q->start = kmalloc(DRIVER_REMOTE_QUEUE_SIZE * sizeof(struct remote_event), GFP_KERNEL);
|
|
if (q->start == 0)
|
|
return -ENOMEM;
|
|
|
|
q->end = q->start + DRIVER_REMOTE_QUEUE_SIZE;
|
|
q->reader = q->start;
|
|
q->writer = q->start;
|
|
q->size = DRIVER_REMOTE_QUEUE_SIZE;
|
|
init_waitqueue_head(&q->wait);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void ibmasm_free_remote_queue(struct service_processor *sp)
|
|
{
|
|
kfree(sp->remote_queue.start);
|
|
}
|
|
|
|
void ibmasm_advance_reader(struct remote_queue *q, unsigned int n)
|
|
{
|
|
q->reader += n;
|
|
if (q->reader >= q->end)
|
|
q->reader -= q->size;
|
|
}
|
|
|
|
size_t ibmasm_events_available(struct remote_queue *q)
|
|
{
|
|
ssize_t diff = q->writer - q->reader;
|
|
|
|
return (diff >= 0) ? diff : q->end - q->reader;
|
|
}
|
|
|
|
|
|
static int space_free(struct remote_queue *q)
|
|
{
|
|
if (q->reader == q->writer)
|
|
return q->size - 1;
|
|
|
|
return ( (q->reader + q->size - q->writer) % q->size ) - 1;
|
|
}
|
|
|
|
static void set_mouse_event(struct remote_input *input, struct mouse_event *mouse)
|
|
{
|
|
static char last_buttons = 0;
|
|
|
|
mouse->x = input->data.mouse.x;
|
|
mouse->y = input->data.mouse.y;
|
|
|
|
if (input->mouse_buttons == REMOTE_MOUSE_DOUBLE_CLICK) {
|
|
mouse->buttons = REMOTE_MOUSE_DOUBLE_CLICK;
|
|
last_buttons = 0;
|
|
return;
|
|
}
|
|
mouse->transitions = last_buttons ^ input->mouse_buttons;
|
|
mouse->buttons = input->mouse_buttons;
|
|
|
|
last_buttons = input->mouse_buttons;
|
|
}
|
|
|
|
static void set_keyboard_event(struct remote_input *input, struct keyboard_event *keyboard)
|
|
{
|
|
keyboard->key_code = input->data.keyboard.key_code;
|
|
keyboard->key_down = input->data.keyboard.key_down;
|
|
}
|
|
|
|
static int add_to_driver_queue(struct remote_queue *q, struct remote_input *input)
|
|
{
|
|
struct remote_event *event = q->writer;
|
|
|
|
if (space_free(q) < 1) {
|
|
return 1;
|
|
}
|
|
|
|
switch(input->type) {
|
|
case (INPUT_TYPE_MOUSE):
|
|
event->type = INPUT_TYPE_MOUSE;
|
|
set_mouse_event(input, &event->data.mouse);
|
|
break;
|
|
case (INPUT_TYPE_KEYBOARD):
|
|
event->type = INPUT_TYPE_KEYBOARD;
|
|
set_keyboard_event(input, &event->data.keyboard);
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
event->type = input->type;
|
|
|
|
q->writer++;
|
|
if (q->writer == q->end)
|
|
q->writer = q->start;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
void ibmasm_handle_mouse_interrupt(struct service_processor *sp)
|
|
{
|
|
unsigned long reader;
|
|
unsigned long writer;
|
|
struct remote_input input;
|
|
|
|
reader = get_queue_reader(sp);
|
|
writer = get_queue_writer(sp);
|
|
|
|
while (reader != writer) {
|
|
memcpy(&input, (void *)get_queue_entry(sp, reader), sizeof(struct remote_input));
|
|
|
|
if (add_to_driver_queue(&sp->remote_queue, &input))
|
|
break;
|
|
|
|
reader = advance_queue_reader(sp, reader);
|
|
}
|
|
wake_up_interruptible(&sp->remote_queue.wait);
|
|
}
|
|
|