diff options
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/tty/vcc.c | 63 |
1 files changed, 62 insertions, 1 deletions
diff --git a/drivers/tty/vcc.c b/drivers/tty/vcc.c index 91f663d207b6..f964fb20e4ba 100644 --- 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) |