static ssize_t read_mouse(struct file * file, char * buffer,
size_t count, loff_t *ppos)
{
ssize_t i;
if (count < 3)
return -EINVAL;
if (!mouse.ready)
return -EAGAIN;
ATIXL_MSE_DISABLE_UPDATE();
/* Allowed interrupts to occur during data gathering - shouldn't hurt */
put_user((char)(~mouse.latch_buttons&7) | 0x80 , buffer);
if (mouse.dx < -127)
mouse.dx = -127;
if (mouse.dx > 127)
mouse.dx = 127;
put_user((char)mouse.dx, buffer + 1);
if (mouse.dy < -127)
mouse.dy = -127;
if (mouse.dy > 127)
mouse.dy = 127;
put_user((char)-mouse.dy, buffer + 2);
for(i = 3; i < count; i++)
put_user(0x00, buffer + i);
mouse.dx = 0;
mouse.dy = 0;
mouse.latch_buttons = mouse.buttons;
mouse.ready = 0;
ATIXL_MSE_ENABLE_UPDATE();
return i; /* i data bytes returned */
}
void mouse_interrupt(int irq, void *dev_id, struct pt_regs * regs)
{
char dx, dy, buttons;
ATIXL_MSE_DISABLE_UPDATE(); /* Note that interrupts are still enabled */
outb(ATIXL_MSE_READ_X, ATIXL_MSE_CONTROL_PORT); /* Select IR1 - X movement */
dx = inb( ATIXL_MSE_DATA_PORT);
outb(ATIXL_MSE_READ_Y, ATIXL_MSE_CONTROL_PORT); /* Select IR2 - Y movement */
dy = inb( ATIXL_MSE_DATA_PORT);
outb(ATIXL_MSE_READ_BUTTONS, ATIXL_MSE_CONTROL_PORT); /* Select IR0 - Button Status */
buttons = inb( ATIXL_MSE_DATA_PORT);
busmouse_add_movementbuttons(msedev, dx, -dy, buttons);
ATIXL_MSE_ENABLE_UPDATE();
}
void mouse_interrupt(int unused)
{
char dx, dy, buttons;
ATIXL_MSE_DISABLE_UPDATE(); /* Note that interrupts are still enabled */
outb(ATIXL_MSE_READ_X, ATIXL_MSE_CONTROL_PORT); /* Select IR1 - X movement */
dx = inb( ATIXL_MSE_DATA_PORT);
outb(ATIXL_MSE_READ_Y, ATIXL_MSE_CONTROL_PORT); /* Select IR2 - Y movement */
dy = inb( ATIXL_MSE_DATA_PORT);
outb(ATIXL_MSE_READ_BUTTONS, ATIXL_MSE_CONTROL_PORT); /* Select IR0 - Button Status */
buttons = inb( ATIXL_MSE_DATA_PORT);
if (dx != 0 || dy != 0 || buttons != mouse.latch_buttons) {
mouse.latch_buttons |= buttons;
mouse.dx += dx;
mouse.dy += dy;
mouse.ready = 1;
wake_up_interruptible(&mouse.wait);
}
ATIXL_MSE_ENABLE_UPDATE();
}
void mouse_interrupt(int irq, void *dev_id, struct pt_regs * regs)
{
char dx, dy, buttons;
ATIXL_MSE_DISABLE_UPDATE(); /* Note that interrupts are still enabled */
outb(ATIXL_MSE_READ_X, ATIXL_MSE_CONTROL_PORT); /* Select IR1 - X movement */
dx = inb( ATIXL_MSE_DATA_PORT);
outb(ATIXL_MSE_READ_Y, ATIXL_MSE_CONTROL_PORT); /* Select IR2 - Y movement */
dy = inb( ATIXL_MSE_DATA_PORT);
outb(ATIXL_MSE_READ_BUTTONS, ATIXL_MSE_CONTROL_PORT); /* Select IR0 - Button Status */
buttons = inb( ATIXL_MSE_DATA_PORT);
if (dx != 0 || dy != 0 || buttons != mouse.latch_buttons) {
add_mouse_randomness((buttons << 16) + (dy << 8) + dx);
mouse.latch_buttons |= buttons;
mouse.dx += dx;
mouse.dy += dy;
mouse.ready = 1;
wake_up_interruptible(&mouse.wait);
if (mouse.fasync)
kill_fasync(mouse.fasync, SIGIO);
}
ATIXL_MSE_ENABLE_UPDATE();
}
