static void
pnx8xxx_set_termios(struct uart_port *port, struct ktermios *termios,
struct ktermios *old)
{
struct pnx8xxx_port *sport = (struct pnx8xxx_port *)port;
unsigned long flags;
unsigned int lcr_fcr, old_ien, baud, quot;
unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8;
while ((termios->c_cflag & CSIZE) != CS7 &&
(termios->c_cflag & CSIZE) != CS8) {
termios->c_cflag &= ~CSIZE;
termios->c_cflag |= old_csize;
old_csize = CS8;
}
if ((termios->c_cflag & CSIZE) == CS8)
lcr_fcr = PNX8XXX_UART_LCR_8BIT;
else
lcr_fcr = 0;
if (termios->c_cflag & CSTOPB)
lcr_fcr |= PNX8XXX_UART_LCR_2STOPB;
if (termios->c_cflag & PARENB) {
lcr_fcr |= PNX8XXX_UART_LCR_PAREN;
if (!(termios->c_cflag & PARODD))
lcr_fcr |= PNX8XXX_UART_LCR_PAREVN;
}
baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
quot = uart_get_divisor(port, baud);
spin_lock_irqsave(&sport->port.lock, flags);
sport->port.read_status_mask = ISTAT_TO_SM(PNX8XXX_UART_INT_RXOVRN) |
ISTAT_TO_SM(PNX8XXX_UART_INT_EMPTY) |
ISTAT_TO_SM(PNX8XXX_UART_INT_RX);
if (termios->c_iflag & INPCK)
sport->port.read_status_mask |=
FIFO_TO_SM(PNX8XXX_UART_FIFO_RXFE) |
FIFO_TO_SM(PNX8XXX_UART_FIFO_RXPAR);
if (termios->c_iflag & (BRKINT | PARMRK))
sport->port.read_status_mask |=
ISTAT_TO_SM(PNX8XXX_UART_INT_BREAK);
sport->port.ignore_status_mask = 0;
if (termios->c_iflag & IGNPAR)
sport->port.ignore_status_mask |=
FIFO_TO_SM(PNX8XXX_UART_FIFO_RXFE) |
FIFO_TO_SM(PNX8XXX_UART_FIFO_RXPAR);
if (termios->c_iflag & IGNBRK) {
sport->port.ignore_status_mask |=
ISTAT_TO_SM(PNX8XXX_UART_INT_BREAK);
if (termios->c_iflag & IGNPAR)
sport->port.ignore_status_mask |=
ISTAT_TO_SM(PNX8XXX_UART_INT_RXOVRN);
}
if ((termios->c_cflag & CREAD) == 0)
sport->port.ignore_status_mask |=
ISTAT_TO_SM(PNX8XXX_UART_INT_RX);
del_timer_sync(&sport->timer);
uart_update_timeout(port, termios->c_cflag, baud);
old_ien = serial_in(sport, PNX8XXX_IEN);
serial_out(sport, PNX8XXX_IEN, old_ien & ~(PNX8XXX_UART_INT_ALLTX |
PNX8XXX_UART_INT_ALLRX));
while (serial_in(sport, PNX8XXX_FIFO) & PNX8XXX_UART_FIFO_TXFIFO_STA)
barrier();
serial_out(sport, PNX8XXX_IEN, 0);
lcr_fcr |= PNX8XXX_UART_LCR_TX_RST;
lcr_fcr |= PNX8XXX_UART_LCR_RX_RST;
serial_out(sport, PNX8XXX_LCR, lcr_fcr);
quot -= 1;
serial_out(sport, PNX8XXX_BAUD, quot);
serial_out(sport, PNX8XXX_ICLR, -1);
serial_out(sport, PNX8XXX_IEN, old_ien);
if (UART_ENABLE_MS(&sport->port, termios->c_cflag))
pnx8xxx_enable_ms(&sport->port);
spin_unlock_irqrestore(&sport->port.lock, flags);
}
static void
ip3106_rx_chars(struct ip3106_port *sport, struct pt_regs *regs)
{
struct tty_struct *tty = sport->port.info->tty;
unsigned int status, ch, flg, ignored = 0;
status = FIFO_TO_SM(serial_in(sport, IP3106_FIFO)) |
ISTAT_TO_SM(serial_in(sport, IP3106_ISTAT));
while (status & FIFO_TO_SM(IP3106_UART_FIFO_RXFIFO)) {
ch = serial_in(sport, IP3106_FIFO);
if (tty->flip.count >= TTY_FLIPBUF_SIZE)
goto ignore_char;
sport->port.icount.rx++;
flg = TTY_NORMAL;
/*
* note that the error handling code is
* out of the main execution path
*/
if (status & FIFO_TO_SM(IP3106_UART_FIFO_RXFE |
IP3106_UART_FIFO_RXPAR))
goto handle_error;
if (uart_handle_sysrq_char(&sport->port, ch, regs))
goto ignore_char;
error_return:
tty_insert_flip_char(tty, ch, flg);
ignore_char:
serial_out(sport, IP3106_LCR, serial_in(sport, IP3106_LCR) |
IP3106_UART_LCR_RX_NEXT);
status = FIFO_TO_SM(serial_in(sport, IP3106_FIFO)) |
ISTAT_TO_SM(serial_in(sport, IP3106_ISTAT));
}
out:
tty_flip_buffer_push(tty);
return;
handle_error:
if (status & FIFO_TO_SM(IP3106_UART_FIFO_RXPAR))
sport->port.icount.parity++;
else if (status & FIFO_TO_SM(IP3106_UART_FIFO_RXFE))
sport->port.icount.frame++;
if (status & ISTAT_TO_SM(IP3106_UART_INT_RXOVRN))
sport->port.icount.overrun++;
if (status & sport->port.ignore_status_mask) {
if (++ignored > 100)
goto out;
goto ignore_char;
}
// status &= sport->port.read_status_mask;
if (status & FIFO_TO_SM(IP3106_UART_FIFO_RXPAR))
flg = TTY_PARITY;
else if (status & FIFO_TO_SM(IP3106_UART_FIFO_RXFE))
flg = TTY_FRAME;
if (status & ISTAT_TO_SM(IP3106_UART_INT_RXOVRN)) {
/*
* overrun does *not* affect the character
* we read from the FIFO
*/
tty_insert_flip_char(tty, ch, flg);
ch = 0;
flg = TTY_OVERRUN;
}
#ifdef SUPPORT_SYSRQ
sport->port.sysrq = 0;
#endif
goto error_return;
}
static void pnx8xxx_rx_chars(struct pnx8xxx_port *sport)
{
struct tty_struct *tty = sport->port.state->port.tty;
unsigned int status, ch, flg;
status = FIFO_TO_SM(serial_in(sport, PNX8XXX_FIFO)) |
ISTAT_TO_SM(serial_in(sport, PNX8XXX_ISTAT));
while (status & FIFO_TO_SM(PNX8XXX_UART_FIFO_RXFIFO)) {
ch = serial_in(sport, PNX8XXX_FIFO) & 0xff;
sport->port.icount.rx++;
flg = TTY_NORMAL;
if (status & (FIFO_TO_SM(PNX8XXX_UART_FIFO_RXFE |
PNX8XXX_UART_FIFO_RXPAR |
PNX8XXX_UART_FIFO_RXBRK) |
ISTAT_TO_SM(PNX8XXX_UART_INT_RXOVRN))) {
if (status & FIFO_TO_SM(PNX8XXX_UART_FIFO_RXBRK)) {
status &= ~(FIFO_TO_SM(PNX8XXX_UART_FIFO_RXFE) |
FIFO_TO_SM(PNX8XXX_UART_FIFO_RXPAR));
sport->port.icount.brk++;
if (uart_handle_break(&sport->port))
goto ignore_char;
} else if (status & FIFO_TO_SM(PNX8XXX_UART_FIFO_RXPAR))
sport->port.icount.parity++;
else if (status & FIFO_TO_SM(PNX8XXX_UART_FIFO_RXFE))
sport->port.icount.frame++;
if (status & ISTAT_TO_SM(PNX8XXX_UART_INT_RXOVRN))
sport->port.icount.overrun++;
status &= sport->port.read_status_mask;
if (status & FIFO_TO_SM(PNX8XXX_UART_FIFO_RXPAR))
flg = TTY_PARITY;
else if (status & FIFO_TO_SM(PNX8XXX_UART_FIFO_RXFE))
flg = TTY_FRAME;
#ifdef SUPPORT_SYSRQ
sport->port.sysrq = 0;
#endif
}
if (uart_handle_sysrq_char(&sport->port, ch))
goto ignore_char;
uart_insert_char(&sport->port, status,
ISTAT_TO_SM(PNX8XXX_UART_INT_RXOVRN), ch, flg);
ignore_char:
serial_out(sport, PNX8XXX_LCR, serial_in(sport, PNX8XXX_LCR) |
PNX8XXX_UART_LCR_RX_NEXT);
status = FIFO_TO_SM(serial_in(sport, PNX8XXX_FIFO)) |
ISTAT_TO_SM(serial_in(sport, PNX8XXX_ISTAT));
}
tty_flip_buffer_push(tty);
}
static void
pnx8xxx_set_termios(struct uart_port *port, struct ktermios *termios,
struct ktermios *old)
{
struct pnx8xxx_port *sport = (struct pnx8xxx_port *)port;
unsigned long flags;
unsigned int lcr_fcr, old_ien, baud, quot;
unsigned int old_csize = old ? old->c_cflag & CSIZE : CS8;
/*
* We only support CS7 and CS8.
*/
while ((termios->c_cflag & CSIZE) != CS7 &&
(termios->c_cflag & CSIZE) != CS8) {
termios->c_cflag &= ~CSIZE;
termios->c_cflag |= old_csize;
old_csize = CS8;
}
if ((termios->c_cflag & CSIZE) == CS8)
lcr_fcr = PNX8XXX_UART_LCR_8BIT;
else
lcr_fcr = 0;
if (termios->c_cflag & CSTOPB)
lcr_fcr |= PNX8XXX_UART_LCR_2STOPB;
if (termios->c_cflag & PARENB) {
lcr_fcr |= PNX8XXX_UART_LCR_PAREN;
if (!(termios->c_cflag & PARODD))
lcr_fcr |= PNX8XXX_UART_LCR_PAREVN;
}
/*
* Ask the core to calculate the divisor for us.
*/
baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
quot = uart_get_divisor(port, baud);
spin_lock_irqsave(&sport->port.lock, flags);
sport->port.read_status_mask = ISTAT_TO_SM(PNX8XXX_UART_INT_RXOVRN) |
ISTAT_TO_SM(PNX8XXX_UART_INT_EMPTY) |
ISTAT_TO_SM(PNX8XXX_UART_INT_RX);
if (termios->c_iflag & INPCK)
sport->port.read_status_mask |=
FIFO_TO_SM(PNX8XXX_UART_FIFO_RXFE) |
FIFO_TO_SM(PNX8XXX_UART_FIFO_RXPAR);
if (termios->c_iflag & (BRKINT | PARMRK))
sport->port.read_status_mask |=
ISTAT_TO_SM(PNX8XXX_UART_INT_BREAK);
/*
* Characters to ignore
*/
sport->port.ignore_status_mask = 0;
if (termios->c_iflag & IGNPAR)
sport->port.ignore_status_mask |=
FIFO_TO_SM(PNX8XXX_UART_FIFO_RXFE) |
FIFO_TO_SM(PNX8XXX_UART_FIFO_RXPAR);
if (termios->c_iflag & IGNBRK) {
sport->port.ignore_status_mask |=
ISTAT_TO_SM(PNX8XXX_UART_INT_BREAK);
/*
* If we're ignoring parity and break indicators,
* ignore overruns too (for real raw support).
*/
if (termios->c_iflag & IGNPAR)
sport->port.ignore_status_mask |=
ISTAT_TO_SM(PNX8XXX_UART_INT_RXOVRN);
}
/*
* ignore all characters if CREAD is not set
*/
if ((termios->c_cflag & CREAD) == 0)
sport->port.ignore_status_mask |=
ISTAT_TO_SM(PNX8XXX_UART_INT_RX);
del_timer_sync(&sport->timer);
/*
* Update the per-port timeout.
*/
uart_update_timeout(port, termios->c_cflag, baud);
/*
* disable interrupts and drain transmitter
*/
old_ien = serial_in(sport, PNX8XXX_IEN);
serial_out(sport, PNX8XXX_IEN, old_ien & ~(PNX8XXX_UART_INT_ALLTX |
PNX8XXX_UART_INT_ALLRX));
while (serial_in(sport, PNX8XXX_FIFO) & PNX8XXX_UART_FIFO_TXFIFO_STA)
barrier();
/* then, disable everything */
serial_out(sport, PNX8XXX_IEN, 0);
/* Reset the Rx and Tx FIFOs too */
lcr_fcr |= PNX8XXX_UART_LCR_TX_RST;
lcr_fcr |= PNX8XXX_UART_LCR_RX_RST;
/* set the parity, stop bits and data size */
serial_out(sport, PNX8XXX_LCR, lcr_fcr);
/* set the baud rate */
quot -= 1;
serial_out(sport, PNX8XXX_BAUD, quot);
serial_out(sport, PNX8XXX_ICLR, -1);
serial_out(sport, PNX8XXX_IEN, old_ien);
if (UART_ENABLE_MS(&sport->port, termios->c_cflag))
pnx8xxx_enable_ms(&sport->port);
spin_unlock_irqrestore(&sport->port.lock, flags);
}
