sparc64: vcc: Add open & close TTY operations

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>

diff --git a/drivers/tty/vcc.c b/drivers/tty/vcc.c
index 91f663d207b6f4f9d3e9eb6aae55a65599867e48..f964fb20e4bab20531965ca39efbd00b06e600ac 100644 (file)
--- a/drivers/tty/vcc.c
+++ b/drivers/tty/vcc.c
@@ -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)