diff options
| author |   Alan Cox <alan@linux.intel.com> | 2012-07-12 13:00:31 +0100 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-07-12 14:48:11 -0700 |
| commit | eb26dfe8aa7eeb5a5aa0b7574550125f8aa4c3b3 (patch) | |
| tree | 8734be494ef3888bf39d0f0a472cc37c5843c4b6 /drivers/tty/serial/8250/8250.c | |
| parent | 8250: propogate the bugs field (diff) | |
| download | linux-dev-eb26dfe8aa7eeb5a5aa0b7574550125f8aa4c3b3.tar.xz linux-dev-eb26dfe8aa7eeb5a5aa0b7574550125f8aa4c3b3.zip | |
8250: add support for ASIX devices with a FIFO bug
Information and a different patch provided by <donald@asix.com.tw>. We do
it a little differently to keep the modularity and to avoid playing with
RLSI.
We add a new uart bug for the parity flaw and set it in the pci matches.
If parity check is enabled then we drop the FIFO trigger to 1 as per the
Asix reference code.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/8250/8250.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index ca42d16e5a12..44f52c6f15b9 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -2202,6 +2202,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, unsigned char cval, fcr = 0; unsigned long flags; unsigned int baud, quot; + int fifo_bug = 0; switch (termios->c_cflag & CSIZE) { case CS5: @@ -2221,8 +2222,11 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, if (termios->c_cflag & CSTOPB) cval |= UART_LCR_STOP; - if (termios->c_cflag & PARENB) + if (termios->c_cflag & PARENB) { cval |= UART_LCR_PARITY; + if (up->bugs & UART_BUG_PARITY) + fifo_bug = 1; + } if (!(termios->c_cflag & PARODD)) cval |= UART_LCR_EPAR; #ifdef CMSPAR @@ -2246,7 +2250,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, if (up->capabilities & UART_CAP_FIFO && port->fifosize > 1) { fcr = uart_config[port->type].fcr; - if (baud < 2400) { + if (baud < 2400 || fifo_bug) { fcr &= ~UART_FCR_TRIGGER_MASK; fcr |= UART_FCR_TRIGGER_1; } |