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ipack/devices/ipoctal: added shutdown callback 

Added shutdown callback to disable RX and TX when there is no other client
accesing the device.

Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Samuel Iglesias Gonsalvez 2012-12-10 11:50:08 +01:00 committed by Greg Kroah-Hartman
parent b0d17fbdac
commit e0f8d323f3
1 changed files with 17 additions and 0 deletions
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17
drivers/ipack/devices/ipoctal.c
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@ -625,6 +625,22 @@ static void ipoctal_hangup(struct tty_struct *tty)
wake_up_interruptible(&channel->tty_port.open_wait);
}
static void ipoctal_shutdown(struct tty_struct *tty)
{
struct ipoctal_channel *channel = tty->driver_data;
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);
clear_bit(ASYNCB_INITIALIZED, &channel->tty_port.flags);
}
static const struct tty_operations ipoctal_fops = {
.ioctl = NULL,
.open = ipoctal_open,
@ -635,6 +651,7 @@ static const struct tty_operations ipoctal_fops = {
.chars_in_buffer = ipoctal_chars_in_buffer,
.get_icount = ipoctal_get_icount,
.hangup = ipoctal_hangup,
.shutdown = ipoctal_shutdown,
};
static int ipoctal_probe(struct ipack_device *dev)