diff options
| -rw-r--r-- | drivers/tty/serial/imx.c | 98 |
1 files changed, 49 insertions, 49 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 8ec8127bc3dc..161e9ed768e4 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -732,6 +732,55 @@ static void imx_dma_rxint(struct imx_port *sport) spin_unlock_irqrestore(&sport->port.lock, flags); } +/* + * We have a modem side uart, so the meanings of RTS and CTS are inverted. + */ +static unsigned int imx_get_hwmctrl(struct imx_port *sport) +{ + unsigned int tmp = TIOCM_DSR; + unsigned usr1 = readl(sport->port.membase + USR1); + + if (usr1 & USR1_RTSS) + tmp |= TIOCM_CTS; + + /* in DCE mode DCDIN is always 0 */ + if (!(usr1 & USR2_DCDIN)) + tmp |= TIOCM_CAR; + + if (sport->dte_mode) + if (!(readl(sport->port.membase + USR2) & USR2_RIIN)) + tmp |= TIOCM_RI; + + return tmp; +} + +/* + * Handle any change of modem status signal since we were last called. + */ +static void imx_mctrl_check(struct imx_port *sport) +{ + unsigned int status, changed; + + status = imx_get_hwmctrl(sport); + changed = status ^ sport->old_status; + + if (changed == 0) + return; + + sport->old_status = status; + + if (changed & TIOCM_RI && status & TIOCM_RI) + sport->port.icount.rng++; + if (changed & TIOCM_DSR) + sport->port.icount.dsr++; + if (changed & TIOCM_CAR) + uart_handle_dcd_change(&sport->port, status & TIOCM_CAR); + if (changed & TIOCM_CTS) + uart_handle_cts_change(&sport->port, status & TIOCM_CTS); + + wake_up_interruptible(&sport->port.state->port.delta_msr_wait); +} + static irqreturn_t imx_int(int irq, void *dev_id) { struct imx_port *sport = dev_id; @@ -794,28 +843,6 @@ static unsigned int imx_tx_empty(struct uart_port *port) return ret; } -/* - * We have a modem side uart, so the meanings of RTS and CTS are inverted. - */ -static unsigned int imx_get_hwmctrl(struct imx_port *sport) -{ - unsigned int tmp = TIOCM_DSR; - unsigned usr1 = readl(sport->port.membase + USR1); - - if (usr1 & USR1_RTSS) - tmp |= TIOCM_CTS; - - /* in DCE mode DCDIN is always 0 */ - if (!(usr1 & USR2_DCDIN)) - tmp |= TIOCM_CAR; - - if (sport->dte_mode) - if (!(readl(sport->port.membase + USR2) & USR2_RIIN)) - tmp |= TIOCM_RI; - - return tmp; -} - static unsigned int imx_get_mctrl(struct uart_port *port) { struct imx_port *sport = (struct imx_port *)port; @@ -873,33 +900,6 @@ static void imx_break_ctl(struct uart_port *port, int break_state) } /* - * Handle any change of modem status signal since we were last called. - */ -static void imx_mctrl_check(struct imx_port *sport) -{ - unsigned int status, changed; - - status = imx_get_hwmctrl(sport); - changed = status ^ sport->old_status; - - if (changed == 0) - return; - - sport->old_status = status; - - if (changed & TIOCM_RI && status & TIOCM_RI) - sport->port.icount.rng++; - if (changed & TIOCM_DSR) - sport->port.icount.dsr++; - if (changed & TIOCM_CAR) - uart_handle_dcd_change(&sport->port, status & TIOCM_CAR); - if (changed & TIOCM_CTS) - uart_handle_cts_change(&sport->port, status & TIOCM_CTS); - - wake_up_interruptible(&sport->port.state->port.delta_msr_wait); -} - -/* * This is our per-port timeout handler, for checking the * modem status signals. */ |