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| 1 | /* | |||
| 2 | * USB Serial Converter Bus specific functions | |||
| 3 | * | |||
| 4 | * Copyright (C) 2002 Greg Kroah-Hartman (greg@kroah.com) | |||
| 5 | * | |||
| 6 | * This program is free software; you can redistribute it and/or | |||
| 7 | * modify it under the terms of the GNU General Public License version | |||
| 8 | * 2 as published by the Free Software Foundation. | |||
| 9 | */ | |||
| 10 | ||||
| 11 | #include <linux/config.h> | |||
| 12 | #include <linux/kernel.h> | |||
| 13 | #include <linux/errno.h> | |||
| 14 | #include <linux/tty.h> | |||
| 15 | #include <linux/module.h> | |||
| 16 | #include <linux/usb.h> | |||
| 17 | #include "usb-serial.h" | |||
| 18 | ||||
| 0 | 0 | - | 19 | static int usb_serial_device_match (struct device *dev, struct device_driver *drv) |
| 20 | { | |||
| 21 | struct usb_serial_driver *driver; | |||
| 22 | const struct usb_serial_port *port; | |||
| 23 | ||||
| 24 | /* | |||
| 25 | * drivers are already assigned to ports in serial_probe so it's | |||
| 26 | * a simple check here. | |||
| 27 | */ | |||
| 28 | port = to_usb_serial_port(dev); | |||
| 0 | 0 | - | 29 | if (!port) |
| 0 | - | 30 | return 0; | |
| 31 | ||||
| 32 | driver = to_usb_serial_driver(drv); | |||
| 33 | ||||
| 0 | 0 | - | 34 | if (driver == port->serial->type) |
| 0 | - | 35 | return 1; | |
| 36 | ||||
| 0 | - | 37 | return 0; | |
| 38 | } | |||
| 39 | ||||
| 0 | 0 | - | 40 | static int usb_serial_device_probe (struct device *dev) |
| 41 | { | |||
| 42 | struct usb_serial_driver *driver; | |||
| 43 | struct usb_serial_port *port; | |||
| 44 | int retval = 0; | |||
| 45 | int minor; | |||
| 46 | ||||
| 47 | port = to_usb_serial_port(dev); | |||
| 0 | 0 | - | 48 | if (!port) { |
| 49 | retval = -ENODEV; | |||
| 0 | - | 50 | goto exit; | |
| 51 | } | |||
| 52 | ||||
| 53 | driver = port->serial->type; | |||
| 0 | 0 | - | 54 | if (driver->port_probe) { |
| 0 | 0 | - | 55 | if (!try_module_get(driver->driver.owner)) { |
| 56 | dev_err(dev, "module get failed, exiting\n"); | |||
| 0 | 0 | - | 56 | ternary-?: ( dev ) -> driver |
| 57 | retval = -EIO; | |||
| 0 | - | 58 | goto exit; | |
| 59 | } | |||
| 60 | retval = driver->port_probe (port); | |||
| 61 | module_put(driver->driver.owner); | |||
| 0 | 0 | - | 62 | if (retval) |
| 0 | - | 63 | goto exit; | |
| 64 | } | |||
| 65 | ||||
| 66 | minor = port->number; | |||
| 67 | tty_register_device (usb_serial_tty_driver, minor, dev); | |||
| 68 | dev_info(&port->serial->dev->dev, | |||
| 0 | 0 | - | 68 | ternary-?: ( & port -> serial -> dev -> dev ) .. |
| 69 | "%s converter now attached to ttyUSB%d\n", | |||
| 70 | driver->description, minor); | |||
| 71 | ||||
| 72 | exit: | |||
| 0 | - | 73 | return retval; | |
| 74 | } | |||
| 75 | ||||
| 0 | 0 | - | 76 | static int usb_serial_device_remove (struct device *dev) |
| 77 | { | |||
| 78 | struct usb_serial_driver *driver; | |||
| 79 | struct usb_serial_port *port; | |||
| 80 | int retval = 0; | |||
| 81 | int minor; | |||
| 82 | ||||
| 83 | port = to_usb_serial_port(dev); | |||
| 0 | 0 | - | 84 | if (!port) { |
| 0 | - | 85 | return -ENODEV; | |
| 86 | } | |||
| 87 | ||||
| 88 | driver = port->serial->type; | |||
| 0 | 0 | - | 89 | if (driver->port_remove) { |
| 0 | 0 | - | 90 | if (!try_module_get(driver->driver.owner)) { |
| 91 | dev_err(dev, "module get failed, exiting\n"); | |||
| 0 | 0 | - | 91 | ternary-?: ( dev ) -> driver |
| 92 | retval = -EIO; | |||
| 0 | - | 93 | goto exit; | |
| 94 | } | |||
| 95 | retval = driver->port_remove (port); | |||
| 96 | module_put(driver->driver.owner); | |||
| 97 | } | |||
| 98 | exit: | |||
| 99 | minor = port->number; | |||
| 100 | tty_unregister_device (usb_serial_tty_driver, minor); | |||
| 101 | dev_info(dev, "%s converter now disconnected from ttyUSB%d\n", | |||
| 0 | 0 | - | 101 | ternary-?: ( dev ) -> driver |
| 102 | driver->description, minor); | |||
| 103 | ||||
| 0 | - | 104 | return retval; | |
| 105 | } | |||
| 106 | ||||
| 107 | struct bus_type usb_serial_bus_type = { | |||
| 108 | .name = "usb-serial", | |||
| 109 | .match = usb_serial_device_match, | |||
| 110 | .probe = usb_serial_device_probe, | |||
| 111 | .remove = usb_serial_device_remove, | |||
| 112 | }; | |||
| 113 | ||||
| 0 | 0 | - | 114 | int usb_serial_bus_register(struct usb_serial_driver *driver) |
| 115 | { | |||
| 116 | int retval; | |||
| 117 | ||||
| 118 | driver->driver.bus = &usb_serial_bus_type; | |||
| 119 | retval = driver_register(&driver->driver); | |||
| 120 | ||||
| 0 | - | 121 | return retval; | |
| 122 | } | |||
| 123 | ||||
| 0 | 0 | - | 124 | void usb_serial_bus_deregister(struct usb_serial_driver *driver) |
| 125 | { | |||
| 126 | driver_unregister(&driver->driver); | |||
| 127 | } | |||
| 128 | ||||
| ***TER 0% (0/42) of SOURCE FILE bus.c | ||||