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| author |   Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> | 2011-02-23 10:03:17 +0900 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@suse.de> | 2011-02-22 17:22:04 -0800 |
| commit | 9af7155bb03675ba2d4d68428a4345e0511ce8dd (patch) | |
| tree | 82c11187bbbaab18601e0a554c120d6aed04a15f /drivers/tty | |
| parent | pch_uart: fix uart clock setting issue (diff) | |
| download | linux-dev-9af7155bb03675ba2d4d68428a4345e0511ce8dd.tar.xz linux-dev-9af7155bb03675ba2d4d68428a4345e0511ce8dd.zip | |
pch_uart: fix auto flow control miss-setting issue
Currently, auto-flow control setting processing is not set correctly.
This patch fixes the issue.
Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/pch_uart.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index 189886122516..0c95051fa0a4 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -218,6 +218,7 @@ struct eg20t_port { struct pch_uart_buffer rxbuf; unsigned int dmsr; unsigned int fcr; + unsigned int mcr; unsigned int use_dma; unsigned int use_dma_flag; struct dma_async_tx_descriptor *desc_tx; @@ -1007,7 +1008,6 @@ static unsigned int pch_uart_get_mctrl(struct uart_port *port) static void pch_uart_set_mctrl(struct uart_port *port, unsigned int mctrl) { u32 mcr = 0; - unsigned int dat; struct eg20t_port *priv = container_of(port, struct eg20t_port, port); if (mctrl & TIOCM_DTR) @@ -1017,11 +1017,11 @@ static void pch_uart_set_mctrl(struct uart_port *port, unsigned int mctrl) if (mctrl & TIOCM_LOOP) mcr |= UART_MCR_LOOP; - if (mctrl) { - dat = pch_uart_get_mctrl(port); - dat |= mcr; - iowrite8(dat, priv->membase + UART_MCR); - } + if (priv->mcr & UART_MCR_AFE) + mcr |= UART_MCR_AFE; + + if (mctrl) + iowrite8(mcr, priv->membase + UART_MCR); } static void pch_uart_stop_tx(struct uart_port *port) @@ -1215,6 +1215,13 @@ static void pch_uart_set_termios(struct uart_port *port, } else { parity = PCH_UART_HAL_PARITY_NONE; } + + /* Only UART0 has auto hardware flow function */ + if ((termios->c_cflag & CRTSCTS) && (priv->fifo_size == 256)) + priv->mcr |= UART_MCR_AFE; + else + priv->mcr &= ~UART_MCR_AFE; + termios->c_cflag &= ~CMSPAR; /* Mark/Space parity is not supported */ baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16); |