diff options
| -rw-r--r-- | drivers/tty/serial/8250.c | 29 | ||||
| -rw-r--r-- | include/linux/serial_8250.h | 4 |
2 files changed, 19 insertions, 14 deletions
diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c index 5274228fa03c..9c0396fa3915 100644 --- a/drivers/tty/serial/8250.c +++ b/drivers/tty/serial/8250.c @@ -1300,8 +1300,6 @@ static void serial8250_stop_tx(struct uart_port *port) } } -static void transmit_chars(struct uart_8250_port *up); - static void serial8250_start_tx(struct uart_port *port) { struct uart_8250_port *up = @@ -1318,7 +1316,7 @@ static void serial8250_start_tx(struct uart_port *port) if ((up->port.type == PORT_RM9000) ? (lsr & UART_LSR_THRE) : (lsr & UART_LSR_TEMT)) - transmit_chars(up); + serial8250_tx_chars(up); } } @@ -1376,12 +1374,12 @@ static void clear_rx_fifo(struct uart_8250_port *up) } /* - * receive_chars: processes according to the passed in LSR + * serial8250_rx_chars: processes according to the passed in LSR * value, and returns the remaining LSR bits not handled * by this Rx routine. */ -static unsigned char -receive_chars(struct uart_8250_port *up, unsigned char lsr) +unsigned char +serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr) { struct tty_struct *tty = up->port.state->port.tty; unsigned char ch; @@ -1462,8 +1460,9 @@ ignore_char: spin_lock(&up->port.lock); return lsr; } +EXPORT_SYMBOL_GPL(serial8250_rx_chars); -static void transmit_chars(struct uart_8250_port *up) +void serial8250_tx_chars(struct uart_8250_port *up) { struct circ_buf *xmit = &up->port.state->xmit; int count; @@ -1500,8 +1499,9 @@ static void transmit_chars(struct uart_8250_port *up) if (uart_circ_empty(xmit)) __stop_tx(up); } +EXPORT_SYMBOL_GPL(serial8250_tx_chars); -static unsigned int check_modem_status(struct uart_8250_port *up) +unsigned int serial8250_modem_status(struct uart_8250_port *up) { unsigned int status = serial_in(up, UART_MSR); @@ -1523,6 +1523,7 @@ static unsigned int check_modem_status(struct uart_8250_port *up) return status; } +EXPORT_SYMBOL_GPL(serial8250_modem_status); /* * This handles the interrupt from one port. @@ -1539,10 +1540,10 @@ static void serial8250_handle_port(struct uart_8250_port *up) DEBUG_INTR("status = %x...", status); if (status & (UART_LSR_DR | UART_LSR_BI)) - status = receive_chars(up, status); - check_modem_status(up); + status = serial8250_rx_chars(up, status); + serial8250_modem_status(up); if (status & UART_LSR_THRE) - transmit_chars(up); + serial8250_tx_chars(up); spin_unlock_irqrestore(&up->port.lock, flags); } @@ -1782,7 +1783,7 @@ static void serial8250_backup_timeout(unsigned long data) } if (!(iir & UART_IIR_NO_INT)) - transmit_chars(up); + serial8250_tx_chars(up); if (is_real_interrupt(up->port.irq)) serial_out(up, UART_IER, ier); @@ -1816,7 +1817,7 @@ static unsigned int serial8250_get_mctrl(struct uart_port *port) unsigned int status; unsigned int ret; - status = check_modem_status(up); + status = serial8250_modem_status(up); ret = 0; if (status & UART_MSR_DCD) @@ -2863,7 +2864,7 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count) * while processing with interrupts off. */ if (up->msr_saved_flags) - check_modem_status(up); + serial8250_modem_status(up); if (locked) spin_unlock(&up->port.lock); diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h index 1f05bbeac01e..b44034eca123 100644 --- a/include/linux/serial_8250.h +++ b/include/linux/serial_8250.h @@ -66,6 +66,7 @@ enum { * dependent on the 8250 driver. */ struct uart_port; +struct uart_8250_port; int serial8250_register_port(struct uart_port *); void serial8250_unregister_port(int line); @@ -82,6 +83,9 @@ extern void serial8250_do_set_termios(struct uart_port *port, extern void serial8250_do_pm(struct uart_port *port, unsigned int state, unsigned int oldstate); int serial8250_handle_irq(struct uart_port *port, unsigned int iir); +unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr); +void serial8250_tx_chars(struct uart_8250_port *up); +unsigned int serial8250_modem_status(struct uart_8250_port *up); extern void serial8250_set_isa_configurator(void (*v) (int port, struct uart_port *up, |