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sparc64: vcc: Add open & close TTY operations

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Add handlers to support TTY open & close operations

Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Reviewed-by: Liam Merwick <liam.merwick@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jag Raman 2017-08-15 17:03:04 -04:00 committed by David S. Miller
parent 103b9b0bc9
commit 63a7174484
1 changed files with 62 additions and 1 deletions
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63
drivers/tty/vcc.c
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@ -746,7 +746,68 @@ static struct vio_driver vcc_driver = {
.name = "vcc",
};
static const struct tty_operations vcc_ops;
static int vcc_open(struct tty_struct *tty, struct file *vcc_file)
{
struct vcc_port *port;
if (unlikely(!tty)) {
pr_err("VCC: open: Invalid TTY handle\n");
return -ENXIO;
}
if (tty->count > 1)
return -EBUSY;
port = vcc_get_ne(tty->index);
if (unlikely(!port)) {
pr_err("VCC: open: Failed to find VCC port\n");
return -ENODEV;
}
if (unlikely(!port->vio.lp)) {
pr_err("VCC: open: LDC channel not configured\n");
vcc_put(port, false);
return -EPIPE;
}
vccdbgl(port->vio.lp);
vcc_put(port, false);
if (unlikely(!tty->port)) {
pr_err("VCC: open: TTY port not found\n");
return -ENXIO;
}
if (unlikely(!tty->port->ops)) {
pr_err("VCC: open: TTY ops not defined\n");
return -ENXIO;
}
return tty_port_open(tty->port, tty, vcc_file);
}
static void vcc_close(struct tty_struct *tty, struct file *vcc_file)
{
if (unlikely(!tty)) {
pr_err("VCC: close: Invalid TTY handle\n");
return;
}
if (unlikely(tty->count > 1))
return;
if (unlikely(!tty->port)) {
pr_err("VCC: close: TTY port not found\n");
return;
}
tty_port_close(tty->port, tty, vcc_file);
}
static const struct tty_operations vcc_ops = {
.open = vcc_open,
.close = vcc_close,
};
#define VCC_TTY_FLAGS (TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_REAL_RAW)