diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/serial/usb-serial.c | 154 |
1 files changed, 77 insertions, 77 deletions
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index f1a1f0fb6d1..266dc583867 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -166,6 +166,41 @@ void usb_serial_put(struct usb_serial *serial) /***************************************************************************** * Driver tty interface functions *****************************************************************************/ + +/** + * serial_install - install tty + * @driver: the driver (USB in our case) + * @tty: the tty being created + * + * Create the termios objects for this tty. We use the default + * USB serial settings but permit them to be overridden by + * serial->type->init_termios. + */ +static int serial_install(struct tty_driver *driver, struct tty_struct *tty) +{ + int idx = tty->index; + struct usb_serial *serial; + int retval; + + /* If the termios setup has yet to be done */ + if (tty->driver->termios[idx] == NULL) { + /* perform the standard setup */ + retval = tty_init_termios(tty); + if (retval) + return retval; + /* allow the driver to update it */ + serial = usb_serial_get_by_index(tty->index); + if (serial->type->init_termios) + serial->type->init_termios(tty); + usb_serial_put(serial); + } + /* Final install (we use the default method) */ + tty_driver_kref_get(driver); + tty->count++; + driver->ttys[idx] = tty; + return 0; +} + static int serial_open (struct tty_struct *tty, struct file *filp) { struct usb_serial *serial; @@ -264,13 +299,11 @@ bailout_serial_put: } /** - * serial_do_down - shut down hardware - * @port: port to shut down + * serial_do_down - shut down hardware + * @port: port to shut down * - * Shut down a USB port unless it is the console. We never shut down the - * console hardware as it will always be in use. - * - * Don't free any resources at this point + * Shut down a USB serial port unless it is the console. We never + * shut down the console hardware as it will always be in use. */ static void serial_do_down(struct usb_serial_port *port) { @@ -278,8 +311,10 @@ static void serial_do_down(struct usb_serial_port *port) struct usb_serial *serial; struct module *owner; - /* The console is magical, do not hang up the console hardware - or there will be tears */ + /* + * The console is magical. Do not hang up the console hardware + * or there will be tears. + */ if (port->console) return; @@ -293,24 +328,50 @@ static void serial_do_down(struct usb_serial_port *port) mutex_unlock(&port->mutex); } +static void serial_hangup(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + serial_do_down(port); + tty_port_hangup(&port->port); + /* We must not free port yet - the USB serial layer depends on it's + continued existence */ +} + +static void serial_close(struct tty_struct *tty, struct file *filp) +{ + struct usb_serial_port *port = tty->driver_data; + + if (!port) + return; + + dbg("%s - port %d", __func__, port->number); + + if (tty_port_close_start(&port->port, tty, filp) == 0) + return; + serial_do_down(port); + tty_port_close_end(&port->port, tty); + tty_port_tty_set(&port->port, NULL); + +} + /** - * serial_do_free - free resources post close/hangup - * @port: port to free up + * serial_do_free - free resources post close/hangup + * @port: port to free up * - * Do the resource freeing and refcount dropping for the port. We must - * be careful about ordering and we must avoid freeing up the console. + * Do the resource freeing and refcount dropping for the port. + * Avoid freeing the console. * - * Called when the last tty kref is dropped. + * Called when the last tty kref is dropped. */ - static void serial_do_free(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; struct usb_serial *serial; struct module *owner; - /* The console is magical, do not hang up the console hardware - or there will be tears */ + /* The console is magical. Do not hang up the console hardware + * or there will be tears. + */ if (port == NULL || port->console) return; @@ -326,32 +387,6 @@ static void serial_do_free(struct tty_struct *tty) module_put(owner); } -static void serial_close(struct tty_struct *tty, struct file *filp) -{ - struct usb_serial_port *port = tty->driver_data; - - if (!port) - return; - - dbg("%s - port %d", __func__, port->number); - - if (tty_port_close_start(&port->port, tty, filp) == 0) - return; - serial_do_down(port); - tty_port_close_end(&port->port, tty); - tty_port_tty_set(&port->port, NULL); - -} - -static void serial_hangup(struct tty_struct *tty) -{ - struct usb_serial_port *port = tty->driver_data; - serial_do_down(port); - tty_port_hangup(&port->port); - /* We must not free port yet - the USB serial layer depends on it's - continued existence */ -} - static int serial_write(struct tty_struct *tty, const unsigned char *buf, int count) { @@ -699,41 +734,6 @@ static const struct tty_port_operations serial_port_ops = { .dtr_rts = serial_dtr_rts, }; -/** - * serial_install - install tty - * @driver: the driver (USB in our case) - * @tty: the tty being created - * - * Create the termios objects for this tty. We use the default USB - * serial ones but permit them to be overriddenby serial->type->termios. - * This lets us remove all the ugly hackery - */ - -static int serial_install(struct tty_driver *driver, struct tty_struct *tty) -{ - int idx = tty->index; - struct usb_serial *serial; - int retval; - - /* If the termios setup has yet to be done */ - if (tty->driver->termios[idx] == NULL) { - /* perform the standard setup */ - retval = tty_init_termios(tty); - if (retval) - return retval; - /* allow the driver to update it */ - serial = usb_serial_get_by_index(tty->index); - if (serial->type->init_termios) - serial->type->init_termios(tty); - usb_serial_put(serial); - } - /* Final install (we use the default method) */ - tty_driver_kref_get(driver); - tty->count++; - driver->ttys[idx] = tty; - return 0; -} - int usb_serial_probe(struct usb_interface *interface, const struct usb_device_id *id) { |