diff options
Diffstat (limited to 'drivers/tty/serial/atmel_serial.c')
| -rw-r--r-- | drivers/tty/serial/atmel_serial.c | 22 |
1 files changed, 10 insertions, 12 deletions
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index 27dade29646b..2a8f528153e7 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -165,6 +165,7 @@ struct atmel_uart_port { struct tasklet_struct tasklet; unsigned int irq_status; unsigned int irq_status_prev; + unsigned int status_change; struct circ_buf rx_ring; @@ -315,8 +316,7 @@ static int atmel_config_rs485(struct uart_port *port, if (rs485conf->flags & SER_RS485_ENABLED) { dev_dbg(port->dev, "Setting UART to RS485\n"); atmel_port->tx_done_mask = ATMEL_US_TXEMPTY; - if ((rs485conf->delay_rts_after_send) > 0) - UART_PUT_TTGR(port, rs485conf->delay_rts_after_send); + UART_PUT_TTGR(port, rs485conf->delay_rts_after_send); mode |= ATMEL_US_USMODE_RS485; } else { dev_dbg(port->dev, "Setting UART to RS232\n"); @@ -354,8 +354,7 @@ static void atmel_set_mctrl(struct uart_port *port, u_int mctrl) /* override mode to RS485 if needed, otherwise keep the current mode */ if (port->rs485.flags & SER_RS485_ENABLED) { - if ((port->rs485.delay_rts_after_send) > 0) - UART_PUT_TTGR(port, port->rs485.delay_rts_after_send); + UART_PUT_TTGR(port, port->rs485.delay_rts_after_send); mode &= ~ATMEL_US_USMODE; mode |= ATMEL_US_USMODE_RS485; } @@ -1177,6 +1176,9 @@ atmel_handle_status(struct uart_port *port, unsigned int pending, if (pending & (ATMEL_US_RIIC | ATMEL_US_DSRIC | ATMEL_US_DCDIC | ATMEL_US_CTSIC)) { atmel_port->irq_status = status; + atmel_port->status_change = atmel_port->irq_status ^ + atmel_port->irq_status_prev; + atmel_port->irq_status_prev = status; tasklet_schedule(&atmel_port->tasklet); } } @@ -1523,17 +1525,14 @@ static void atmel_tasklet_func(unsigned long data) { struct uart_port *port = (struct uart_port *)data; struct atmel_uart_port *atmel_port = to_atmel_uart_port(port); - unsigned int status; - unsigned int status_change; + unsigned int status = atmel_port->irq_status; + unsigned int status_change = atmel_port->status_change; /* The interrupt handler does not take the lock */ spin_lock(&port->lock); atmel_port->schedule_tx(port); - status = atmel_port->irq_status; - status_change = status ^ atmel_port->irq_status_prev; - if (status_change & (ATMEL_US_RI | ATMEL_US_DSR | ATMEL_US_DCD | ATMEL_US_CTS)) { /* TODO: All reads to CSR will clear these interrupts! */ @@ -1548,7 +1547,7 @@ static void atmel_tasklet_func(unsigned long data) wake_up_interruptible(&port->state->port.delta_msr_wait); - atmel_port->irq_status_prev = status; + atmel_port->status_change = 0; } atmel_port->schedule_rx(port); @@ -2061,8 +2060,7 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios, /* mode */ if (port->rs485.flags & SER_RS485_ENABLED) { - if ((port->rs485.delay_rts_after_send) > 0) - UART_PUT_TTGR(port, port->rs485.delay_rts_after_send); + UART_PUT_TTGR(port, port->rs485.delay_rts_after_send); mode |= ATMEL_US_USMODE_RS485; } else if (termios->c_cflag & CRTSCTS) { /* RS232 with hardware handshake (RTS/CTS) */ |