#include <linux/init.h>
#include <linux/delay.h>
#include <linux/tty_flip.h>
+#include <linux/smp_lock.h>
#include <linux/spinlock.h>
+#include <linux/device.h>
#include <linux/uaccess.h>
if (port == NULL)
return;
- tty = port->port.tty;
+ tty = tty_port_tty_get(&port->port);
#ifdef RC_REPORT_OVERRUN
status = rc_in(bp, CD180_RCSR);
#endif
ch = rc_in(bp, CD180_RDR);
if (!status)
- return;
+ goto out;
if (status & RCSR_TOUT) {
printk(KERN_WARNING "rc%d: port %d: Receiver timeout. "
"Hardware problems ?\n",
board_No(bp), port_No(port));
- return;
+ goto out;
} else if (status & RCSR_BREAK) {
printk(KERN_INFO "rc%d: port %d: Handling break...\n",
board_No(bp), port_No(port));
flag = TTY_BREAK;
- if (port->port.flags & ASYNC_SAK)
+ if (tty && (port->port.flags & ASYNC_SAK))
do_SAK(tty);
} else if (status & RCSR_PE)
else
flag = TTY_NORMAL;
- tty_insert_flip_char(tty, ch, flag);
- tty_flip_buffer_push(tty);
+ if (tty) {
+ tty_insert_flip_char(tty, ch, flag);
+ tty_flip_buffer_push(tty);
+ }
+out:
+ tty_kref_put(tty);
}
static void rc_receive(struct riscom_board const *bp)
if (port == NULL)
return;
- tty = port->port.tty;
+ tty = tty_port_tty_get(&port->port);
count = rc_in(bp, CD180_RDCR);
#endif
while (count--) {
- if (tty_buffer_request_room(tty, 1) == 0) {
- printk(KERN_WARNING "rc%d: port %d: Working around "
- "flip buffer overflow.\n",
- board_No(bp), port_No(port));
- break;
- }
- tty_insert_flip_char(tty, rc_in(bp, CD180_RDR), TTY_NORMAL);
+ u8 ch = rc_in(bp, CD180_RDR);
+ if (tty)
+ tty_insert_flip_char(tty, ch, TTY_NORMAL);
+ }
+ if (tty) {
+ tty_flip_buffer_push(tty);
+ tty_kref_put(tty);
}
- tty_flip_buffer_push(tty);
}
static void rc_transmit(struct riscom_board const *bp)
if (port == NULL)
return;
- tty = port->port.tty;
+ tty = tty_port_tty_get(&port->port);
if (port->IER & IER_TXEMPTY) {
/* FIFO drained */
rc_out(bp, CD180_CAR, port_No(port));
port->IER &= ~IER_TXEMPTY;
rc_out(bp, CD180_IER, port->IER);
- return;
+ goto out;
}
if ((port->xmit_cnt <= 0 && !port->break_length)
- || tty->stopped || tty->hw_stopped) {
+ || (tty && (tty->stopped || tty->hw_stopped))) {
rc_out(bp, CD180_CAR, port_No(port));
port->IER &= ~IER_TXRDY;
rc_out(bp, CD180_IER, port->IER);
- return;
+ goto out;
}
if (port->break_length) {
rc_out(bp, CD180_CCR, CCR_CORCHG2);
port->break_length = 0;
}
- return;
+ goto out;
}
count = CD180_NFIFO;
port->IER &= ~IER_TXRDY;
rc_out(bp, CD180_IER, port->IER);
}
- if (port->xmit_cnt <= port->wakeup_chars)
+ if (tty && port->xmit_cnt <= port->wakeup_chars)
tty_wakeup(tty);
+out:
+ tty_kref_put(tty);
}
static void rc_check_modem(struct riscom_board const *bp)
if (port == NULL)
return;
- tty = port->port.tty;
+ tty = tty_port_tty_get(&port->port);
mcr = rc_in(bp, CD180_MCR);
if (mcr & MCR_CDCHG) {
if (rc_in(bp, CD180_MSVR) & MSVR_CD)
wake_up_interruptible(&port->port.open_wait);
- else
+ else if (tty)
tty_hangup(tty);
}
#ifdef RISCOM_BRAIN_DAMAGED_CTS
if (mcr & MCR_CTSCHG) {
if (rc_in(bp, CD180_MSVR) & MSVR_CTS) {
- tty->hw_stopped = 0;
port->IER |= IER_TXRDY;
- if (port->xmit_cnt <= port->wakeup_chars)
- tty_wakeup(tty);
+ if (tty) {
+ tty->hw_stopped = 0;
+ if (port->xmit_cnt <= port->wakeup_chars)
+ tty_wakeup(tty);
+ }
} else {
- tty->hw_stopped = 1;
+ if (tty)
+ tty->hw_stopped = 1;
port->IER &= ~IER_TXRDY;
}
rc_out(bp, CD180_IER, port->IER);
}
if (mcr & MCR_DSRCHG) {
if (rc_in(bp, CD180_MSVR) & MSVR_DSR) {
- tty->hw_stopped = 0;
port->IER |= IER_TXRDY;
- if (port->xmit_cnt <= port->wakeup_chars)
- tty_wakeup(tty);
+ if (tty) {
+ tty->hw_stopped = 0;
+ if (port->xmit_cnt <= port->wakeup_chars)
+ tty_wakeup(tty);
+ }
} else {
- tty->hw_stopped = 1;
+ if (tty)
+ tty->hw_stopped = 1;
port->IER &= ~IER_TXRDY;
}
rc_out(bp, CD180_IER, port->IER);
/* Clear change bits */
rc_out(bp, CD180_MCR, 0);
+ tty_kref_put(tty);
}
/* The main interrupt processing routine */
* Setting up port characteristics.
* Must be called with disabled interrupts
*/
-static void rc_change_speed(struct riscom_board *bp, struct riscom_port *port)
+static void rc_change_speed(struct tty_struct *tty, struct riscom_board *bp,
+ struct riscom_port *port)
{
- struct tty_struct *tty = port->port.tty;
unsigned long baud;
long tmp;
unsigned char cor1 = 0, cor3 = 0;
}
/* Must be called with interrupts enabled */
-static int rc_setup_port(struct riscom_board *bp, struct riscom_port *port)
+static int rc_setup_port(struct tty_struct *tty, struct riscom_board *bp,
+ struct riscom_port *port)
{
unsigned long flags;
spin_lock_irqsave(&riscom_lock, flags);
- clear_bit(TTY_IO_ERROR, &port->port.tty->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(bp, port);
+ rc_change_speed(tty, bp, port);
port->port.flags |= ASYNC_INITIALIZED;
spin_unlock_irqrestore(&riscom_lock, flags);
port->port.count++;
tty->driver_data = port;
- port->port.tty = tty;
+ tty_port_tty_set(&port->port, tty);
- error = rc_setup_port(bp, port);
+ error = rc_setup_port(tty, bp, port);
if (error == 0)
error = tty_port_block_til_ready(&port->port, tty, filp);
return error;
tty_wakeup(tty);
}
-static void rc_close(struct tty_struct *tty, struct file *filp)
+static void rc_close_port(struct tty_port *port)
{
- struct riscom_port *port = tty->driver_data;
- struct riscom_board *bp;
unsigned long flags;
+ struct riscom_port *rp = container_of(port, struct riscom_port, port);
+ struct riscom_board *bp = port_Board(rp);
unsigned long timeout;
-
- if (!port || rc_paranoia_check(port, tty->name, "close"))
- return;
-
- bp = port_Board(port);
-
- if (tty_port_close_start(&port->port, tty, filp) == 0)
- return;
/*
* At this point we stop accepting input. To do this, we
*/
spin_lock_irqsave(&riscom_lock, flags);
- port->IER &= ~IER_RXD;
- if (port->port.flags & ASYNC_INITIALIZED) {
- port->IER &= ~IER_TXRDY;
- port->IER |= IER_TXEMPTY;
- rc_out(bp, CD180_CAR, port_No(port));
- rc_out(bp, CD180_IER, port->IER);
+ 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 (port->IER & IER_TXEMPTY) {
+ while (rp->IER & IER_TXEMPTY) {
spin_unlock_irqrestore(&riscom_lock, flags);
- msleep_interruptible(jiffies_to_msecs(port->timeout));
+ msleep_interruptible(jiffies_to_msecs(rp->timeout));
spin_lock_irqsave(&riscom_lock, flags);
if (time_after(jiffies, timeout))
break;
}
}
- rc_shutdown_port(tty, bp, port);
- rc_flush_buffer(tty);
+ rc_shutdown_port(port->tty, bp, rp);
spin_unlock_irqrestore(&riscom_lock, flags);
+}
+
+static void rc_close(struct tty_struct *tty, struct file *filp)
+{
+ struct riscom_port *port = tty->driver_data;
- tty_port_close_end(&port->port, tty);
+ if (!port || rc_paranoia_check(port, tty->name, "close"))
+ return;
+ tty_port_close(&port->port, tty, filp);
}
static int rc_write(struct tty_struct *tty,
return 0;
}
-static int rc_set_serial_info(struct riscom_port *port,
+static int rc_set_serial_info(struct tty_struct *tty, struct riscom_port *port,
struct serial_struct __user *newinfo)
{
struct serial_struct tmp;
if (copy_from_user(&tmp, newinfo, sizeof(tmp)))
return -EFAULT;
-#if 0
- if ((tmp.irq != bp->irq) ||
- (tmp.port != bp->base) ||
- (tmp.type != PORT_CIRRUS) ||
- (tmp.baud_base != (RC_OSCFREQ + CD180_TPC/2) / CD180_TPC) ||
- (tmp.custom_divisor != 0) ||
- (tmp.xmit_fifo_size != CD180_NFIFO) ||
- (tmp.flags & ~RISCOM_LEGAL_FLAGS))
- return -EINVAL;
-#endif
-
change_speed = ((port->port.flags & ASYNC_SPD_MASK) !=
(tmp.flags & ASYNC_SPD_MASK));
unsigned long flags;
spin_lock_irqsave(&riscom_lock, flags);
- rc_change_speed(bp, port);
+ rc_change_speed(tty, bp, port);
spin_unlock_irqrestore(&riscom_lock, flags);
}
return 0;
break;
case TIOCSSERIAL:
lock_kernel();
- retval = rc_set_serial_info(port, argp);
+ retval = rc_set_serial_info(tty, port, argp);
unlock_kernel();
break;
default:
static void rc_hangup(struct tty_struct *tty)
{
struct riscom_port *port = tty->driver_data;
- struct riscom_board *bp;
- unsigned long flags;
if (rc_paranoia_check(port, tty->name, "rc_hangup"))
return;
- bp = port_Board(port);
-
- rc_shutdown_port(tty, bp, port);
- spin_lock_irqsave(&port->port.lock, flags);
- port->port.count = 0;
- port->port.flags &= ~ASYNC_NORMAL_ACTIVE;
- port->port.tty = NULL;
- wake_up_interruptible(&port->port.open_wait);
- spin_unlock_irqrestore(&port->port.lock, flags);
+ rc_shutdown_port(tty, port_Board(port), port);
+ tty_port_hangup(&port->port);
}
static void rc_set_termios(struct tty_struct *tty,
return;
spin_lock_irqsave(&riscom_lock, flags);
- rc_change_speed(port_Board(port), port);
+ rc_change_speed(tty, port_Board(port), port);
spin_unlock_irqrestore(&riscom_lock, flags);
if ((old_termios->c_cflag & CRTSCTS) &&
static const struct tty_port_operations riscom_port_ops = {
.carrier_raised = carrier_raised,
+ .shutdown = rc_close_port,
};
module_param(iobase3, int, 0);
MODULE_LICENSE("GPL");
+MODULE_ALIAS_CHARDEV_MAJOR(RISCOM8_NORMAL_MAJOR);
#endif /* MODULE */
/*
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff