On Tue, 2013-07-02 at 17:07 +0200, Hendrik Brueckner wrote:
> 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.
I only just noticed that ... oops. Why add those dtr_rts() calls ? We
already have tiocmset in there which is used to set DTR on HVSI consoles
such as hvc_opal when using hvsi_lib...
Any reason why a separate callback was needed ?
Cheers,
Ben.
> Signed-off-by: Hendrik Brueckner <brueckner@xxxxxxxxxxxxxxxxxx>
> ---
> drivers/tty/hvc/hvc_console.c | 11 ++++++++++-
> drivers/tty/hvc/hvc_console.h | 3 +++
> 2 files changed, 13 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c
> index eb255e8..9eba119 100644
> --- a/drivers/tty/hvc/hvc_console.c
> +++ b/drivers/tty/hvc/hvc_console.c
> @@ -361,7 +361,12 @@ static int hvc_open(struct tty_struct *tty, struct file * filp)
> tty->driver_data = NULL;
> tty_port_put(&hp->port);
> printk(KERN_ERR "hvc_open: request_irq failed with rc %d.\n", rc);
> - }
> + } else
> + /* We are ready... raise DTR/RTS */
> + if (C_BAUD(tty))
> + if (hp->ops->dtr_rts)
> + hp->ops->dtr_rts(hp, 1);
> +
> /* Force wakeup of the polling thread */
> hvc_kick();
>
> @@ -393,6 +398,10 @@ static void hvc_close(struct tty_struct *tty, struct file * filp)
> /* We are done with the tty pointer now. */
> tty_port_tty_set(&hp->port, NULL);
>
> + if (C_HUPCL(tty))
> + if (hp->ops->dtr_rts)
> + hp->ops->dtr_rts(hp, 0);
> +
> if (hp->ops->notifier_del)
> hp->ops->notifier_del(hp, hp->data);
>
> diff --git a/drivers/tty/hvc/hvc_console.h b/drivers/tty/hvc/hvc_console.h
> index 674d23c..9131019 100644
> --- a/drivers/tty/hvc/hvc_console.h
> +++ b/drivers/tty/hvc/hvc_console.h
> @@ -75,6 +75,9 @@ struct hv_ops {
> /* tiocmget/set implementation */
> int (*tiocmget)(struct hvc_struct *hp);
> int (*tiocmset)(struct hvc_struct *hp, unsigned int set, unsigned int clear);
> +
> + /* Callbacks to handle tty ports */
> + void (*dtr_rts)(struct hvc_struct *hp, int raise);
> };
>
> /* Register a vterm and a slot index for use as a console (console_init) */
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