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authorSamuel Iglesias Gonsalvez <siglesias@igalia.com>2012-12-10 14:50:08 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-01-16 06:24:39 +0400
commite0f8d323f34dee3f47388dc3d87e7c428b077a0d (patch)
treead0c03cfb1a579fa893adf48843cbf88dee5d26c /drivers/ipack/devices
parentb0d17fbdacb32f9f4b9ee1ad2b8f42f6a480d842 (diff)
downloadlinux-e0f8d323f34dee3f47388dc3d87e7c428b077a0d.tar.xz
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>
Diffstat (limited to 'drivers/ipack/devices')
-rw-r--r--drivers/ipack/devices/ipoctal.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c
index 8666d2d05eef..0b3c4b8fe830 100644
--- a/drivers/ipack/devices/ipoctal.c
+++ b/drivers/ipack/devices/ipoctal.c
@@ -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)