diff options
Diffstat (limited to 'drivers/tty/serial/stm32-usart.c')
| -rw-r--r-- | drivers/tty/serial/stm32-usart.c | 33 |
1 files changed, 25 insertions, 8 deletions
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c index ba503dd04ce2..ee6c7762d355 100644 --- a/drivers/tty/serial/stm32-usart.c +++ b/drivers/tty/serial/stm32-usart.c @@ -129,13 +129,9 @@ static int stm32_config_rs485(struct uart_port *port, if (rs485conf->flags & SER_RS485_RTS_ON_SEND) { cr3 &= ~USART_CR3_DEP; rs485conf->flags &= ~SER_RS485_RTS_AFTER_SEND; - mctrl_gpio_set(stm32_port->gpios, - stm32_port->port.mctrl & ~TIOCM_RTS); } else { cr3 |= USART_CR3_DEP; rs485conf->flags |= SER_RS485_RTS_AFTER_SEND; - mctrl_gpio_set(stm32_port->gpios, - stm32_port->port.mctrl | TIOCM_RTS); } writel_relaxed(cr3, port->membase + ofs->cr3); @@ -541,17 +537,42 @@ static void stm32_disable_ms(struct uart_port *port) /* Transmit stop */ static void stm32_stop_tx(struct uart_port *port) { + struct stm32_port *stm32_port = to_stm32_port(port); + struct serial_rs485 *rs485conf = &port->rs485; + stm32_tx_interrupt_disable(port); + + if (rs485conf->flags & SER_RS485_ENABLED) { + if (rs485conf->flags & SER_RS485_RTS_ON_SEND) { + mctrl_gpio_set(stm32_port->gpios, + stm32_port->port.mctrl & ~TIOCM_RTS); + } else { + mctrl_gpio_set(stm32_port->gpios, + stm32_port->port.mctrl | TIOCM_RTS); + } + } } /* There are probably characters waiting to be transmitted. */ static void stm32_start_tx(struct uart_port *port) { + struct stm32_port *stm32_port = to_stm32_port(port); + struct serial_rs485 *rs485conf = &port->rs485; struct circ_buf *xmit = &port->state->xmit; if (uart_circ_empty(xmit)) return; + if (rs485conf->flags & SER_RS485_ENABLED) { + if (rs485conf->flags & SER_RS485_RTS_ON_SEND) { + mctrl_gpio_set(stm32_port->gpios, + stm32_port->port.mctrl | TIOCM_RTS); + } else { + mctrl_gpio_set(stm32_port->gpios, + stm32_port->port.mctrl & ~TIOCM_RTS); + } + } + stm32_transmit_chars(port); } @@ -851,13 +872,9 @@ static void stm32_set_termios(struct uart_port *port, struct ktermios *termios, if (rs485conf->flags & SER_RS485_RTS_ON_SEND) { cr3 &= ~USART_CR3_DEP; rs485conf->flags &= ~SER_RS485_RTS_AFTER_SEND; - mctrl_gpio_set(stm32_port->gpios, - stm32_port->port.mctrl & ~TIOCM_RTS); } else { cr3 |= USART_CR3_DEP; rs485conf->flags |= SER_RS485_RTS_AFTER_SEND; - mctrl_gpio_set(stm32_port->gpios, - stm32_port->port.mctrl | TIOCM_RTS); } } else { |