Blackfin serial driver: implement support for ignoring parity/break errors
properly setting up and respecting the read_status_mask / ignore_status_mask fields of the serial core Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mike Frysinger
Linus Torvalds
parent
5c4e472b0a
commit
2ac5ee4738
|
|
@ -6,8 +6,6 @@
|
|||
* Created:
|
||||
* Description: Driver for blackfin 5xx serial ports
|
||||
*
|
||||
* Rev: $Id: bfin_5xx.c,v 1.19 2006/09/24 02:33:53 aubrey Exp $
|
||||
*
|
||||
* Modified:
|
||||
* Copyright 2006 Analog Devices Inc.
|
||||
*
|
||||
|
|
@ -152,7 +150,7 @@ static void local_put_char(struct bfin_serial_port *uart, char ch)
|
|||
|
||||
static void bfin_serial_rx_chars(struct bfin_serial_port *uart)
|
||||
{
|
||||
struct tty_struct *tty = uart->port.info?uart->port.info->tty:0;
|
||||
struct tty_struct *tty = uart->port.info->tty;
|
||||
unsigned int status, ch, flg;
|
||||
#ifdef BF533_FAMILY
|
||||
static int in_break = 0;
|
||||
|
|
@ -173,8 +171,10 @@ static void bfin_serial_rx_chars(struct bfin_serial_port *uart)
|
|||
if (ch != 0) {
|
||||
in_break = 0;
|
||||
ch = UART_GET_CHAR(uart);
|
||||
}
|
||||
return;
|
||||
if (bfin_revid() < 5)
|
||||
return;
|
||||
} else
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
|
||||
|
|
@ -185,27 +185,32 @@ static void bfin_serial_rx_chars(struct bfin_serial_port *uart)
|
|||
uart->port.icount.brk++;
|
||||
if (uart_handle_break(&uart->port))
|
||||
goto ignore_char;
|
||||
flg = TTY_BREAK;
|
||||
} else if (status & PE) {
|
||||
flg = TTY_PARITY;
|
||||
}
|
||||
if (status & PE)
|
||||
uart->port.icount.parity++;
|
||||
} else if (status & OE) {
|
||||
flg = TTY_OVERRUN;
|
||||
if (status & OE)
|
||||
uart->port.icount.overrun++;
|
||||
} else if (status & FE) {
|
||||
flg = TTY_FRAME;
|
||||
if (status & FE)
|
||||
uart->port.icount.frame++;
|
||||
} else
|
||||
|
||||
status &= uart->port.read_status_mask;
|
||||
|
||||
if (status & BI)
|
||||
flg = TTY_BREAK;
|
||||
else if (status & PE)
|
||||
flg = TTY_PARITY;
|
||||
else if (status & FE)
|
||||
flg = TTY_FRAME;
|
||||
else
|
||||
flg = TTY_NORMAL;
|
||||
|
||||
if (uart_handle_sysrq_char(&uart->port, ch))
|
||||
goto ignore_char;
|
||||
if (tty)
|
||||
uart_insert_char(&uart->port, status, 2, ch, flg);
|
||||
|
||||
ignore_char:
|
||||
if (tty)
|
||||
tty_flip_buffer_push(tty);
|
||||
uart_insert_char(&uart->port, status, OE, ch, flg);
|
||||
|
||||
ignore_char:
|
||||
tty_flip_buffer_push(tty);
|
||||
}
|
||||
|
||||
static void bfin_serial_tx_chars(struct bfin_serial_port *uart)
|
||||
|
|
@ -254,7 +259,6 @@ static irqreturn_t bfin_serial_rx_int(int irq, void *dev_id)
|
|||
static irqreturn_t bfin_serial_tx_int(int irq, void *dev_id)
|
||||
{
|
||||
struct bfin_serial_port *uart = dev_id;
|
||||
unsigned short status;
|
||||
|
||||
spin_lock(&uart->port.lock);
|
||||
while ((UART_GET_IIR(uart) & IIR_STATUS) == IIR_TX_READY)
|
||||
|
|
@ -325,7 +329,7 @@ static void bfin_serial_dma_tx_chars(struct bfin_serial_port *uart)
|
|||
spin_unlock_irqrestore(&uart->port.lock, flags);
|
||||
}
|
||||
|
||||
static void bfin_serial_dma_rx_chars(struct bfin_serial_port * uart)
|
||||
static void bfin_serial_dma_rx_chars(struct bfin_serial_port *uart)
|
||||
{
|
||||
struct tty_struct *tty = uart->port.info->tty;
|
||||
int i, flg, status;
|
||||
|
|
@ -337,25 +341,32 @@ static void bfin_serial_dma_rx_chars(struct bfin_serial_port * uart)
|
|||
uart->port.icount.brk++;
|
||||
if (uart_handle_break(&uart->port))
|
||||
goto dma_ignore_char;
|
||||
flg = TTY_BREAK;
|
||||
} else if (status & PE) {
|
||||
flg = TTY_PARITY;
|
||||
}
|
||||
if (status & PE)
|
||||
uart->port.icount.parity++;
|
||||
} else if (status & OE) {
|
||||
flg = TTY_OVERRUN;
|
||||
if (status & OE)
|
||||
uart->port.icount.overrun++;
|
||||
} else if (status & FE) {
|
||||
flg = TTY_FRAME;
|
||||
if (status & FE)
|
||||
uart->port.icount.frame++;
|
||||
} else
|
||||
|
||||
status &= uart->port.read_status_mask;
|
||||
|
||||
if (status & BI)
|
||||
flg = TTY_BREAK;
|
||||
else if (status & PE)
|
||||
flg = TTY_PARITY;
|
||||
else if (status & FE)
|
||||
flg = TTY_FRAME;
|
||||
else
|
||||
flg = TTY_NORMAL;
|
||||
|
||||
for (i = uart->rx_dma_buf.head; i < uart->rx_dma_buf.tail; i++) {
|
||||
if (uart_handle_sysrq_char(&uart->port, uart->rx_dma_buf.buf[i]))
|
||||
goto dma_ignore_char;
|
||||
uart_insert_char(&uart->port, status, 2, uart->rx_dma_buf.buf[i], flg);
|
||||
uart_insert_char(&uart->port, status, OE, uart->rx_dma_buf.buf[i], flg);
|
||||
}
|
||||
dma_ignore_char:
|
||||
|
||||
dma_ignore_char:
|
||||
tty_flip_buffer_push(tty);
|
||||
}
|
||||
|
||||
|
|
@ -620,13 +631,27 @@ bfin_serial_set_termios(struct uart_port *port, struct ktermios *termios,
|
|||
lcr |= EPS;
|
||||
}
|
||||
|
||||
/* These controls are not implemented for this port */
|
||||
termios->c_iflag |= INPCK | BRKINT | PARMRK;
|
||||
termios->c_iflag &= ~(IGNPAR | IGNBRK);
|
||||
port->read_status_mask = OE;
|
||||
if (termios->c_iflag & INPCK)
|
||||
port->read_status_mask |= (FE | PE);
|
||||
if (termios->c_iflag & (BRKINT | PARMRK))
|
||||
port->read_status_mask |= BI;
|
||||
|
||||
/* These controls are not implemented for this port */
|
||||
termios->c_iflag |= INPCK | BRKINT | PARMRK;
|
||||
termios->c_iflag &= ~(IGNPAR | IGNBRK);
|
||||
/*
|
||||
* Characters to ignore
|
||||
*/
|
||||
port->ignore_status_mask = 0;
|
||||
if (termios->c_iflag & IGNPAR)
|
||||
port->ignore_status_mask |= FE | PE;
|
||||
if (termios->c_iflag & IGNBRK) {
|
||||
port->ignore_status_mask |= BI;
|
||||
/*
|
||||
* If we're ignoring parity and break indicators,
|
||||
* ignore overruns too (for real raw support).
|
||||
*/
|
||||
if (termios->c_iflag & IGNPAR)
|
||||
port->ignore_status_mask |= OE;
|
||||
}
|
||||
|
||||
baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
|
||||
quot = uart_get_divisor(port, baud);
|
||||
|
|
|
|||
Loading…
Reference in a new issue