diff options
Diffstat (limited to 'drivers/tty/vcc.c')
| -rw-r--r-- | drivers/tty/vcc.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/drivers/tty/vcc.c b/drivers/tty/vcc.c index f913217159ee..5e608173b091 100644 --- a/drivers/tty/vcc.c +++ b/drivers/tty/vcc.c @@ -487,6 +487,8 @@ static struct vio_version vcc_versions[] = { { .major = 1, .minor = 0 }, }; +static struct tty_port_operations vcc_port_ops = { 0 }; + static ssize_t vcc_sysfs_domain_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -994,6 +996,75 @@ static int vcc_break_ctl(struct tty_struct *tty, int state) return 0; } +static int vcc_install(struct tty_driver *driver, struct tty_struct *tty) +{ + struct vcc_port *port_vcc; + struct tty_port *port_tty; + int ret; + + if (unlikely(!tty)) { + pr_err("VCC: install: Invalid TTY handle\n"); + return -ENXIO; + } + + if (tty->index >= VCC_MAX_PORTS) + return -EINVAL; + + ret = tty_standard_install(driver, tty); + if (ret) + return ret; + + port_tty = kzalloc(sizeof(struct tty_port), GFP_KERNEL); + if (!port_tty) + return -ENOMEM; + + port_vcc = vcc_get(tty->index, true); + if (!port_vcc) { + pr_err("VCC: install: Failed to find VCC port\n"); + tty->port = NULL; + kfree(port_tty); + return -ENODEV; + } + + tty_port_init(port_tty); + port_tty->ops = &vcc_port_ops; + tty->port = port_tty; + + port_vcc->tty = tty; + + vcc_put(port_vcc, true); + + return 0; +} + +static void vcc_cleanup(struct tty_struct *tty) +{ + struct vcc_port *port; + + if (unlikely(!tty)) { + pr_err("VCC: cleanup: Invalid TTY handle\n"); + return; + } + + port = vcc_get(tty->index, true); + if (port) { + port->tty = NULL; + + if (port->removed) { + vcc_table_remove(tty->index); + kfree(port->vio.name); + kfree(port->domain); + kfree(port); + } else { + vcc_put(port, true); + } + } + + tty_port_destroy(tty->port); + kfree(tty->port); + tty->port = NULL; +} + static const struct tty_operations vcc_ops = { .open = vcc_open, .close = vcc_close, @@ -1002,6 +1073,8 @@ static const struct tty_operations vcc_ops = { .write_room = vcc_write_room, .chars_in_buffer = vcc_chars_in_buffer, .break_ctl = vcc_break_ctl, + .install = vcc_install, + .cleanup = vcc_cleanup, }; #define VCC_TTY_FLAGS (TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_REAL_RAW) |