static void l4ser_shm_tx_chars(struct uart_port *port)
{
struct l4ser_shm_uart_port *l4port = (struct l4ser_shm_uart_port *)port;
struct circ_buf *xmit = &port->state->xmit;
int c, do_trigger = 0;
struct tty_struct *tty = port->state->port.tty;
tty->hw_stopped = 0;
tty->stopped = 0;
if (port->x_char) {
if (tx_buf(port, &port->x_char, 1)) {
L4XV_V(f);
port->icount.tx++;
port->x_char = 0;
L4XV_L(f);
l4shmc_trigger(&l4port->tx_sig);
L4XV_U(f);
}
return;
}
if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
return;
}
while (!uart_circ_empty(xmit)) {
unsigned long r;
c = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE);
if (!(r = tx_buf(port, &xmit->buf[xmit->tail], c)))
break;
xmit->tail = (xmit->tail + r) & (UART_XMIT_SIZE - 1);
port->icount.tx += r;
do_trigger = 1;
}
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(port);
if (do_trigger) {
L4XV_V(f);
L4XV_L(f);
l4shmc_trigger(&l4port->tx_sig);
L4XV_U(f);
}
}
int collision (void)
{
unsigned short csr, sta;
/* tell G64 to start bounce with LRR and BRD set */
print (2, "\rTest Remote collision:\n");
csr = LRREQ_BIT + BRDIS_BIT;
if (set_csr (bc, rt, &csr, &status) == -1)
BAD1 ("system error in set LRR+BRD");
print (2, "LRR + BRD set in RT\r");
/* test first the receive buffer */
csr = RB_BIT;
if (set_csr (bc, rt, &csr, &status) == -1)
BAD1 ("system error in set RB");
if (wait_for_csr (TB_BIT, TB_BIT, 60, 1) == 0) {
print (1, "Erreur de synchro. Le RT n'a pas mits son bit TB a 1\n");
erreur++;
return (1);
}
print (1, "Test du receive buffer");
rx_buf (); /* test receive buffer */
rx_buf (); /* test receive buffer */
rx_buf (); /* test receive buffer */
print (1, "\n");
csr = RB_BIT;
if (clr_csr (bc, rt, &csr, &status) == -1)
BAD1 ("system error in clr RB");
/* Wait for the end of the G64 */
if (wait_for_csr (TB_BIT, 0, 60, 1) == 0) {
print (1, "Erreur de synchro. Le RT n'a pas mis son bit TB a 0\n");
erreur++;
return (1);
}
/* Then test the transmit buffer */
csr = TB_BIT;
if (set_csr (bc, rt, &csr, &status) == -1)
BAD1 ("system error in set TB");
if (wait_for_csr (RB_BIT, RB_BIT, 60, 1) == 0) {
print (1, "Erreur de synchro. Le RT n'a pas mits son bit RB a 1\n");
erreur++;
return (1);
}
print (1, "Test du transmit buffer");
tx_buf (); /* test transmit buffer */
tx_buf (); /* test transmit buffer */
tx_buf (); /* test transmit buffer */
print (1, "\n");
csr = TB_BIT;
if (clr_csr (bc, rt, &csr, &sta) == -1)
BAD1 ("system error in clr TB");
/* Wait for the end of the G64 */
if (wait_for_csr (RB_BIT, 0, 60, 1) == 0) {
print (1, "Erreur de synchro. Le RT n'a pas mis son bit RB a 0\n");
return (1);
}
/* clear collision pattern LRR and BRD set */
csr = LRREQ_BIT + BRDIS_BIT;
if (clr_csr (bc, rt, &csr, &status) == -1)
BAD1 ("system error in clr LRR+BRD");
if (get_csr (bc, rt, &csr, &status) == -1)
BAD1 ("system error in get_csr");
if ((csr & INV_BIT) == INV_BIT) {
print (0, "Le G64 a detecte une ou plusieurs erreurs au cours du test collision\n");
erreur++;
csr = INV_BIT;
if (clr_csr (bc, rt, &csr, &status) == -1)
BAD1 ("system error in clr INV");
if (t_err)
return t_err;
}
return (erreur);
}
