u8 __iomem *int_space;
};
+static inline struct ipoctal *chan_to_ipoctal(struct ipoctal_channel *chan,
+ unsigned int index)
+{
+ return container_of(chan, struct ipoctal, channel[index]);
+}
+
+static void ipoctal_reset_channel(struct ipoctal_channel *channel)
+{
+ iowrite8(CR_DISABLE_RX | CR_DISABLE_TX, &channel->regs->w.cr);
+ channel->rx_enable = 0;
+ iowrite8(CR_CMD_RESET_RX, &channel->regs->w.cr);
+ iowrite8(CR_CMD_RESET_TX, &channel->regs->w.cr);
+ iowrite8(CR_CMD_RESET_ERR_STATUS, &channel->regs->w.cr);
+ iowrite8(CR_CMD_RESET_MR, &channel->regs->w.cr);
+}
+
static int ipoctal_port_activate(struct tty_port *port, struct tty_struct *tty)
{
struct ipoctal_channel *channel;
static int ipoctal_open(struct tty_struct *tty, struct file *file)
{
- struct ipoctal_channel *channel;
+ struct ipoctal_channel *channel = dev_get_drvdata(tty->dev);
+ struct ipoctal *ipoctal = chan_to_ipoctal(channel, tty->index);
+ int err;
- channel = dev_get_drvdata(tty->dev);
tty->driver_data = channel;
- return tty_port_open(&channel->tty_port, tty, file);
+ if (!ipack_get_carrier(ipoctal->dev))
+ return -EBUSY;
+
+ err = tty_port_open(&channel->tty_port, tty, file);
+ if (err)
+ ipack_put_carrier(ipoctal->dev);
+
+ return err;
}
static void ipoctal_reset_stats(struct ipoctal_stats *stats)
flag = TTY_FRAME;
}
if (sr & SR_RECEIVED_BREAK) {
- iowrite8(CR_CMD_RESET_BREAK_CHANGE, &channel->regs->w.cr);
channel->stats.rcv_break++;
flag = TTY_BREAK;
}
isr = ioread8(&channel->block_regs->r.isr);
sr = ioread8(&channel->regs->r.sr);
+ if (isr & (IMR_DELTA_BREAK_A | IMR_DELTA_BREAK_B))
+ iowrite8(CR_CMD_RESET_BREAK_CHANGE, &channel->regs->w.cr);
+
if ((sr & SR_TX_EMPTY) && (channel->nb_bytes == 0)) {
iowrite8(CR_DISABLE_TX, &channel->regs->w.cr);
/* In case of RS-485, change from TX to RX when finishing TX.
channel->isr_rx_rdy_mask = ISR_RxRDY_FFULL_A;
}
- iowrite8(CR_DISABLE_RX | CR_DISABLE_TX, &channel->regs->w.cr);
- channel->rx_enable = 0;
- iowrite8(CR_CMD_RESET_RX, &channel->regs->w.cr);
- iowrite8(CR_CMD_RESET_TX, &channel->regs->w.cr);
+ ipoctal_reset_channel(channel);
iowrite8(MR1_CHRL_8_BITS | MR1_ERROR_CHAR | MR1_RxINT_RxRDY,
&channel->regs->w.mr); /* mr1 */
iowrite8(0, &channel->regs->w.mr); /* mr2 */
cflag = tty->termios.c_cflag;
/* Disable and reset everything before change the setup */
- iowrite8(CR_DISABLE_RX | CR_DISABLE_TX, &channel->regs->w.cr);
- iowrite8(CR_CMD_RESET_RX, &channel->regs->w.cr);
- iowrite8(CR_CMD_RESET_TX, &channel->regs->w.cr);
- iowrite8(CR_CMD_RESET_ERR_STATUS, &channel->regs->w.cr);
- iowrite8(CR_CMD_RESET_MR, &channel->regs->w.cr);
+ ipoctal_reset_channel(channel);
/* Set Bits per chars */
switch (cflag & CSIZE) {
tty_port_hangup(&channel->tty_port);
- iowrite8(CR_DISABLE_RX | CR_DISABLE_TX, &channel->regs->w.cr);
- channel->rx_enable = 0;
- iowrite8(CR_CMD_RESET_RX, &channel->regs->w.cr);
- iowrite8(CR_CMD_RESET_TX, &channel->regs->w.cr);
- iowrite8(CR_CMD_RESET_ERR_STATUS, &channel->regs->w.cr);
- iowrite8(CR_CMD_RESET_MR, &channel->regs->w.cr);
+ ipoctal_reset_channel(channel);
clear_bit(ASYNCB_INITIALIZED, &channel->tty_port.flags);
wake_up_interruptible(&channel->tty_port.open_wait);
if (channel == NULL)
return;
- iowrite8(CR_DISABLE_RX | CR_DISABLE_TX, &channel->regs->w.cr);
- channel->rx_enable = 0;
- iowrite8(CR_CMD_RESET_RX, &channel->regs->w.cr);
- iowrite8(CR_CMD_RESET_TX, &channel->regs->w.cr);
- iowrite8(CR_CMD_RESET_ERR_STATUS, &channel->regs->w.cr);
- iowrite8(CR_CMD_RESET_MR, &channel->regs->w.cr);
+ ipoctal_reset_channel(channel);
clear_bit(ASYNCB_INITIALIZED, &channel->tty_port.flags);
}
+static void ipoctal_cleanup(struct tty_struct *tty)
+{
+ struct ipoctal_channel *channel = tty->driver_data;
+ struct ipoctal *ipoctal = chan_to_ipoctal(channel, tty->index);
+
+ /* release the carrier driver */
+ ipack_put_carrier(ipoctal->dev);
+}
+
static const struct tty_operations ipoctal_fops = {
.ioctl = NULL,
.open = ipoctal_open,
.get_icount = ipoctal_get_icount,
.hangup = ipoctal_hangup,
.shutdown = ipoctal_shutdown,
+ .cleanup = ipoctal_cleanup,
};
static int ipoctal_probe(struct ipack_device *dev)