static void
fs3270_deactivate(struct raw3270_view *view)
{
struct fs3270 *fp;
fp = (struct fs3270 *) view;
fp->active = 0;
/* If an old init command is still running just return. */
if (!raw3270_request_final(fp->init))
return;
/* Prepare read-buffer request. */
raw3270_request_set_cmd(fp->init, TC_RDBUF);
/*
* Hackish: skip first 5 bytes of the idal buffer to make
* room for the TW_KR/TO_SBA/<address>/<address>/TO_IC sequence
* in the activation command.
*/
fp->rdbuf->data[0] += 5;
fp->rdbuf->size -= 5;
raw3270_request_set_idal(fp->init, fp->rdbuf);
fp->init->rescnt = 0;
fp->init->callback = fs3270_save_callback;
/* Start I/O to read in the 3270 buffer. */
fp->init->rc = raw3270_start_locked(view, fp->init);
if (fp->init->rc)
fp->init->callback(fp->init, NULL);
}
/*
* Process reads from fullscreen 3270.
*/
static ssize_t
fs3270_read(struct file *filp, char *data, size_t count, loff_t *off)
{
struct fs3270 *fp;
struct raw3270_request *rq;
struct idal_buffer *ib;
int rc;
if (count == 0 || count > 65535)
return -EINVAL;
fp = filp->private_data;
if (!fp)
return -ENODEV;
ib = idal_buffer_alloc(count, 0);
if (!ib)
return -ENOMEM;
rq = raw3270_request_alloc(0);
if (!IS_ERR(rq)) {
if (fp->read_command == 0 && fp->write_command != 0)
fp->read_command = 6;
raw3270_request_set_cmd(rq, fp->read_command ? : 2);
raw3270_request_set_idal(rq, ib);
wait_event(fp->attn_wait, fp->attention);
rc = fs3270_do_io(&fp->view, rq);
if (rc == 0 && idal_buffer_to_user(ib, data, count))
rc = -EFAULT;
raw3270_request_free(rq);
} else
static int
fs3270_activate(struct raw3270_view *view)
{
struct fs3270 *fp;
char *cp;
int rc;
fp = (struct fs3270 *) view;
/* If an old init command is still running just return. */
if (!raw3270_request_final(fp->init))
return 0;
if (fp->rdbuf_size == 0) {
/* No saved buffer. Just clear the screen. */
raw3270_request_set_cmd(fp->init, TC_EWRITEA);
fp->init->callback = fs3270_reset_callback;
} else {
/* Restore fullscreen buffer saved by fs3270_deactivate. */
raw3270_request_set_cmd(fp->init, TC_EWRITEA);
raw3270_request_set_idal(fp->init, fp->rdbuf);
fp->init->ccw.count = fp->rdbuf_size;
cp = fp->rdbuf->data[0];
cp[0] = TW_KR;
cp[1] = TO_SBA;
cp[2] = cp[6];
cp[3] = cp[7];
cp[4] = TO_IC;
cp[5] = TO_SBA;
cp[6] = 0x40;
cp[7] = 0x40;
fp->init->rescnt = 0;
fp->init->callback = fs3270_restore_callback;
}
rc = fp->init->rc = raw3270_start_locked(view, fp->init);
if (rc)
fp->init->callback(fp->init, NULL);
else
fp->active = 1;
return rc;
}
