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tty/hvc_console: Add DTR/RTS callback to handle HUPCL control
Introduce a new callback to explicitly handle the HUPCL termios control flag. This prepares for a follow-up commit for the hvc_iucv device driver to improve handling when to drop an established network connection. The callback naming is based on the recently added tty_port interface to facilitate a potential refactoring of the hvc_console to use tty_port functions. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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parent
e84f54fc58
commit
33e745a192
2 changed files with 13 additions and 1 deletions
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@ -361,7 +361,12 @@ static int hvc_open(struct tty_struct *tty, struct file * filp)
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tty->driver_data = NULL;
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tty_port_put(&hp->port);
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printk(KERN_ERR "hvc_open: request_irq failed with rc %d.\n", rc);
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}
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} else
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/* We are ready... raise DTR/RTS */
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if (C_BAUD(tty))
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if (hp->ops->dtr_rts)
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hp->ops->dtr_rts(hp, 1);
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/* Force wakeup of the polling thread */
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hvc_kick();
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@ -393,6 +398,10 @@ static void hvc_close(struct tty_struct *tty, struct file * filp)
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/* We are done with the tty pointer now. */
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tty_port_tty_set(&hp->port, NULL);
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if (C_HUPCL(tty))
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if (hp->ops->dtr_rts)
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hp->ops->dtr_rts(hp, 0);
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if (hp->ops->notifier_del)
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hp->ops->notifier_del(hp, hp->data);
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@ -75,6 +75,9 @@ struct hv_ops {
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/* tiocmget/set implementation */
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int (*tiocmget)(struct hvc_struct *hp);
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int (*tiocmset)(struct hvc_struct *hp, unsigned int set, unsigned int clear);
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/* Callbacks to handle tty ports */
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void (*dtr_rts)(struct hvc_struct *hp, int raise);
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};
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/* Register a vterm and a slot index for use as a console (console_init) */
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