diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/char/riscom8.c | 89 |
1 files changed, 41 insertions, 48 deletions
diff --git a/drivers/char/riscom8.c b/drivers/char/riscom8.c index 3cfa22d469e0..0a8d1e56c993 100644 --- a/drivers/char/riscom8.c +++ b/drivers/char/riscom8.c @@ -793,26 +793,21 @@ static void rc_change_speed(struct tty_struct *tty, struct riscom_board *bp, } /* Must be called with interrupts enabled */ -static int rc_setup_port(struct tty_struct *tty, struct riscom_board *bp, - struct riscom_port *port) +static int rc_activate_port(struct tty_port *port, struct tty_struct *tty) { + struct riscom_port *rp = container_of(port, struct riscom_port, port); + struct riscom_board *bp = port_Board(rp); unsigned long flags; - if (port->port.flags & ASYNC_INITIALIZED) - return 0; - - if (tty_port_alloc_xmit_buf(&port->port) < 0) + if (tty_port_alloc_xmit_buf(port) < 0) return -ENOMEM; spin_lock_irqsave(&riscom_lock, flags); clear_bit(TTY_IO_ERROR, &tty->flags); - if (port->port.count == 1) - bp->count++; - port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; - rc_change_speed(tty, bp, port); - port->port.flags |= ASYNC_INITIALIZED; - + bp->count++; + rp->xmit_cnt = rp->xmit_head = rp->xmit_tail = 0; + rc_change_speed(tty, bp, rp); spin_unlock_irqrestore(&riscom_lock, flags); return 0; } @@ -821,9 +816,6 @@ static int rc_setup_port(struct tty_struct *tty, struct riscom_board *bp, static void rc_shutdown_port(struct tty_struct *tty, struct riscom_board *bp, struct riscom_port *port) { - if (!(port->port.flags & ASYNC_INITIALIZED)) - return; - #ifdef RC_REPORT_OVERRUN printk(KERN_INFO "rc%d: port %d: Total %ld overruns were detected.\n", board_No(bp), port_No(port), port->overrun); @@ -840,11 +832,6 @@ static void rc_shutdown_port(struct tty_struct *tty, } #endif tty_port_free_xmit_buf(&port->port); - if (C_HUPCL(tty)) { - /* Drop DTR */ - bp->DTR |= (1u << port_No(port)); - rc_out(bp, RC_DTR, bp->DTR); - } /* Select port */ rc_out(bp, CD180_CAR, port_No(port)); @@ -856,7 +843,6 @@ static void rc_shutdown_port(struct tty_struct *tty, rc_out(bp, CD180_IER, port->IER); set_bit(TTY_IO_ERROR, &tty->flags); - port->port.flags &= ~ASYNC_INITIALIZED; if (--bp->count < 0) { printk(KERN_INFO "rc%d: rc_shutdown_port: " @@ -889,6 +875,20 @@ static int carrier_raised(struct tty_port *port) return CD; } +static void dtr_rts(struct tty_port *port, int onoff) +{ + struct riscom_port *p = container_of(port, struct riscom_port, port); + struct riscom_board *bp = port_Board(p); + unsigned long flags; + + spin_lock_irqsave(&riscom_lock, flags); + bp->DTR &= ~(1u << port_No(p)); + if (onoff == 0) + bp->DTR |= (1u << port_No(p)); + rc_out(bp, RC_DTR, bp->DTR); + spin_unlock_irqrestore(&riscom_lock, flags); +} + static int rc_open(struct tty_struct *tty, struct file *filp) { int board; @@ -909,14 +909,7 @@ static int rc_open(struct tty_struct *tty, struct file *filp) if (error) return error; - port->port.count++; - tty->driver_data = port; - tty_port_tty_set(&port->port, tty); - - error = rc_setup_port(tty, bp, port); - if (error == 0) - error = tty_port_block_til_ready(&port->port, tty, filp); - return error; + return tty_port_open(&port->port, tty, filp); } static void rc_flush_buffer(struct tty_struct *tty) @@ -950,24 +943,23 @@ static void rc_close_port(struct tty_port *port) spin_lock_irqsave(&riscom_lock, flags); rp->IER &= ~IER_RXD; - if (port->flags & ASYNC_INITIALIZED) { - rp->IER &= ~IER_TXRDY; - rp->IER |= IER_TXEMPTY; - rc_out(bp, CD180_CAR, port_No(rp)); - rc_out(bp, CD180_IER, rp->IER); - /* - * Before we drop DTR, make sure the UART transmitter - * has completely drained; this is especially - * important if there is a transmit FIFO! - */ - timeout = jiffies + HZ; - while (rp->IER & IER_TXEMPTY) { - spin_unlock_irqrestore(&riscom_lock, flags); - msleep_interruptible(jiffies_to_msecs(rp->timeout)); - spin_lock_irqsave(&riscom_lock, flags); - if (time_after(jiffies, timeout)) - break; - } + + rp->IER &= ~IER_TXRDY; + rp->IER |= IER_TXEMPTY; + rc_out(bp, CD180_CAR, port_No(rp)); + rc_out(bp, CD180_IER, rp->IER); + /* + * Before we drop DTR, make sure the UART transmitter + * has completely drained; this is especially + * important if there is a transmit FIFO! + */ + timeout = jiffies + HZ; + while (rp->IER & IER_TXEMPTY) { + spin_unlock_irqrestore(&riscom_lock, flags); + msleep_interruptible(jiffies_to_msecs(rp->timeout)); + spin_lock_irqsave(&riscom_lock, flags); + if (time_after(jiffies, timeout)) + break; } rc_shutdown_port(port->tty, bp, rp); spin_unlock_irqrestore(&riscom_lock, flags); @@ -1354,7 +1346,6 @@ static void rc_hangup(struct tty_struct *tty) if (rc_paranoia_check(port, tty->name, "rc_hangup")) return; - rc_shutdown_port(tty, port_Board(port), port); tty_port_hangup(&port->port); } @@ -1401,7 +1392,9 @@ static const struct tty_operations riscom_ops = { static const struct tty_port_operations riscom_port_ops = { .carrier_raised = carrier_raised, + .dtr_rts = dtr_rts, .shutdown = rc_close_port, + .activate = rc_activate_port, }; |