From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- drivers/usb/serial/bus.c | 134 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 134 insertions(+) create mode 100644 drivers/usb/serial/bus.c (limited to 'drivers/usb/serial/bus.c') diff --git a/drivers/usb/serial/bus.c b/drivers/usb/serial/bus.c new file mode 100644 index 0000000..2f612c2 --- /dev/null +++ b/drivers/usb/serial/bus.c @@ -0,0 +1,134 @@ +/* + * USB Serial Converter Bus specific functions + * + * Copyright (C) 2002 Greg Kroah-Hartman (greg@kroah.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version + * 2 as published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include "usb-serial.h" + +static int usb_serial_device_match (struct device *dev, struct device_driver *drv) +{ + struct usb_serial_device_type *driver; + const struct usb_serial_port *port; + + /* + * drivers are already assigned to ports in serial_probe so it's + * a simple check here. + */ + port = to_usb_serial_port(dev); + if (!port) + return 0; + + driver = to_usb_serial_driver(drv); + + if (driver == port->serial->type) + return 1; + + return 0; +} + +struct bus_type usb_serial_bus_type = { + .name = "usb-serial", + .match = usb_serial_device_match, +}; + +static int usb_serial_device_probe (struct device *dev) +{ + struct usb_serial_device_type *driver; + struct usb_serial_port *port; + int retval = 0; + int minor; + + port = to_usb_serial_port(dev); + if (!port) { + retval = -ENODEV; + goto exit; + } + + driver = port->serial->type; + if (driver->port_probe) { + if (!try_module_get(driver->owner)) { + dev_err(dev, "module get failed, exiting\n"); + retval = -EIO; + goto exit; + } + retval = driver->port_probe (port); + module_put(driver->owner); + if (retval) + goto exit; + } + + minor = port->number; + tty_register_device (usb_serial_tty_driver, minor, dev); + dev_info(&port->serial->dev->dev, + "%s converter now attached to ttyUSB%d\n", + driver->name, minor); + +exit: + return retval; +} + +static int usb_serial_device_remove (struct device *dev) +{ + struct usb_serial_device_type *driver; + struct usb_serial_port *port; + int retval = 0; + int minor; + + port = to_usb_serial_port(dev); + if (!port) { + return -ENODEV; + } + + driver = port->serial->type; + if (driver->port_remove) { + if (!try_module_get(driver->owner)) { + dev_err(dev, "module get failed, exiting\n"); + retval = -EIO; + goto exit; + } + retval = driver->port_remove (port); + module_put(driver->owner); + } +exit: + minor = port->number; + tty_unregister_device (usb_serial_tty_driver, minor); + dev_info(dev, "%s converter now disconnected from ttyUSB%d\n", + driver->name, minor); + + return retval; +} + +int usb_serial_bus_register(struct usb_serial_device_type *device) +{ + int retval; + + if (device->short_name) + device->driver.name = (char *)device->short_name; + else + device->driver.name = (char *)device->name; + device->driver.bus = &usb_serial_bus_type; + device->driver.probe = usb_serial_device_probe; + device->driver.remove = usb_serial_device_remove; + device->driver.owner = device->owner; + + retval = driver_register(&device->driver); + + return retval; +} + +void usb_serial_bus_deregister(struct usb_serial_device_type *device) +{ + driver_unregister (&device->driver); +} + -- cgit v1.1