static void ambauart_tx_chars(struct uart_info *info)
{
struct uart_port *port = info->port;
int count;
if (port->x_char) {
UART_PUT_CHAR(port, port->x_char);
port->icount.tx++;
port->x_char = 0;
return;
}
if (info->xmit.head == info->xmit.tail
|| info->tty->stopped
|| info->tty->hw_stopped) {
ambauart_stop_tx(port, 0);
return;
}
count = port->fifosize >> 1;
do {
UART_PUT_CHAR(port, info->xmit.buf[info->xmit.tail]);
info->xmit.tail = (info->xmit.tail + 1) & (UART_XMIT_SIZE - 1);
port->icount.tx++;
if (info->xmit.head == info->xmit.tail)
break;
} while (--count > 0);
if (CIRC_CNT(info->xmit.head, info->xmit.tail, UART_XMIT_SIZE) <
WAKEUP_CHARS)
uart_event(info, EVT_WRITE_WAKEUP);
if (info->xmit.head == info->xmit.tail)
ambauart_stop_tx(info->port, 0);
}
static int plser_tx_chars(struct uart_info *info)
{
struct uart_port *port = info->port;
if (port->x_char) {
if (! plser_tx_available(port)) {
return 1;
}
plser_writeb(port, port->x_char, SER_DATA);
port->icount.tx++;
port->x_char = 0;
return 0;
}
if (info->xmit.head == info->xmit.tail
|| info->tty->stopped
|| info->tty->hw_stopped) {
plser_stop_tx(info->port, 0);
return 0;
}
/*
* Tried using FIFO (not checking TNF) for fifo fill:
* still had the '4 bytes repeated' problem.
*/
while (plser_tx_available(port)) {
plser_writeb(port, info->xmit.buf[info->xmit.tail], SER_DATA);
info->xmit.tail = (info->xmit.tail + 1) & (UART_XMIT_SIZE - 1);
port->icount.tx++;
if (info->xmit.head == info->xmit.tail)
break;
}
if (CIRC_CNT(info->xmit.head, info->xmit.tail, UART_XMIT_SIZE) <
WAKEUP_CHARS)
uart_event(info, EVT_WRITE_WAKEUP);
if (info->xmit.head == info->xmit.tail)
plser_stop_tx(info->port, 0);
else
return 1;
return 0;
}
static inline void
anakin_tx_chars(struct uart_info *info)
{
if (info->x_char) {
anakin_transmit_x_char(info);
return;
}
if (info->xmit.head == info->xmit.tail
|| info->tty->stopped
|| info->tty->hw_stopped) {
anakin_stop_tx(info->port, 0);
return;
}
anakin_transmit_buffer(info);
if (CIRC_CNT(info->xmit.head,
info->xmit.tail,
UART_XMIT_SIZE) < WAKEUP_CHARS)
uart_event(info, EVT_WRITE_WAKEUP);
}
static void omahauart_tx_chars(struct uart_info *info)
{
struct uart_port *port = info->port;
volatile unsigned int status;
if (port->x_char) {
UART_PUT_CHAR(port, port->x_char);
port->icount.tx++;
port->x_char = 0;
return;
}
if (info->xmit.head == info->xmit.tail
|| info->tty->stopped
|| info->tty->hw_stopped) {
omahauart_stop_tx(port, 0);
return;
}
status = UART_FIFO_STATUS(info->port);
// FIll FIFO as far as possible
while(UART_TX_DATA(UART_FIFO_STATUS(info->port)))
{
UART_PUT_CHAR(port, info->xmit.buf[info->xmit.tail]);
info->xmit.tail = (info->xmit.tail + 1) & (UART_XMIT_SIZE - 1);
port->icount.tx++;
if (info->xmit.head == info->xmit.tail)
break;
}
if (CIRC_CNT(info->xmit.head, info->xmit.tail, UART_XMIT_SIZE) <
WAKEUP_CHARS)
uart_event(info, EVT_WRITE_WAKEUP);
if (info->xmit.head == info->xmit.tail)
omahauart_stop_tx(info->port, 0);
}
static void clps711xuart_int_tx(int irq, void *dev_id, struct pt_regs *regs)
{
struct uart_info *info = dev_id;
struct uart_port *port = info->port;
int count;
if (port->x_char) {
clps_writel(port->x_char, UARTDR(port));
port->icount.tx++;
port->x_char = 0;
return;
}
if (info->xmit.head == info->xmit.tail
|| info->tty->stopped
|| info->tty->hw_stopped) {
clps711xuart_stop_tx(info->port, 0);
return;
}
count = port->fifosize >> 1;
do {
clps_writel(info->xmit.buf[info->xmit.tail], UARTDR(port));
info->xmit.tail = (info->xmit.tail + 1) & (UART_XMIT_SIZE - 1);
port->icount.tx++;
if (info->xmit.head == info->xmit.tail)
break;
} while (--count > 0);
if (CIRC_CNT(info->xmit.head,
info->xmit.tail,
UART_XMIT_SIZE) < WAKEUP_CHARS)
uart_event(info, EVT_WRITE_WAKEUP);
if (info->xmit.head == info->xmit.tail)
clps711xuart_stop_tx(info->port, 0);
}
static void sa1100_tx_chars(struct uart_info *info)
{
struct uart_port *port = info->port;
if (port->x_char) {
UART_PUT_CHAR(port, port->x_char);
port->icount.tx++;
port->x_char = 0;
return;
}
if (info->xmit.head == info->xmit.tail
|| info->tty->stopped
|| info->tty->hw_stopped) {
sa1100_stop_tx(info->port, 0);
return;
}
/*
* Tried using FIFO (not checking TNF) for fifo fill:
* still had the '4 bytes repeated' problem.
*/
while (UART_GET_UTSR1(port) & UTSR1_TNF) {
UART_PUT_CHAR(port, info->xmit.buf[info->xmit.tail]);
info->xmit.tail = (info->xmit.tail + 1) & (UART_XMIT_SIZE - 1);
port->icount.tx++;
if (info->xmit.head == info->xmit.tail)
break;
}
if (CIRC_CNT(info->xmit.head, info->xmit.tail, UART_XMIT_SIZE) <
WAKEUP_CHARS)
uart_event(info, EVT_WRITE_WAKEUP);
if (info->xmit.head == info->xmit.tail)
sa1100_stop_tx(info->port, 0);
}
static inline void main_event(void)
{
uart_event();
}
