2 * USB Serial Converter Bus specific functions
4 * Copyright (C) 2002 Greg Kroah-Hartman (greg@kroah.com)
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.
11 #include <linux/kernel.h>
12 #include <linux/errno.h>
13 #include <linux/tty.h>
14 #include <linux/slab.h>
15 #include <linux/module.h>
16 #include <linux/usb.h>
17 #include <linux/usb/serial.h>
19 static int usb_serial_device_match(struct device
*dev
,
20 struct device_driver
*drv
)
22 struct usb_serial_driver
*driver
;
23 const struct usb_serial_port
*port
;
26 * drivers are already assigned to ports in serial_probe so it's
27 * a simple check here.
29 port
= to_usb_serial_port(dev
);
33 driver
= to_usb_serial_driver(drv
);
35 if (driver
== port
->serial
->type
)
41 static ssize_t
show_port_number(struct device
*dev
,
42 struct device_attribute
*attr
, char *buf
)
44 struct usb_serial_port
*port
= to_usb_serial_port(dev
);
46 return sprintf(buf
, "%d\n", port
->number
- port
->serial
->minor
);
49 static DEVICE_ATTR(port_number
, S_IRUGO
, show_port_number
, NULL
);
51 static int usb_serial_device_probe(struct device
*dev
)
53 struct usb_serial_driver
*driver
;
54 struct usb_serial_port
*port
;
58 port
= to_usb_serial_port(dev
);
64 driver
= port
->serial
->type
;
65 if (driver
->port_probe
) {
66 retval
= driver
->port_probe(port
);
71 retval
= device_create_file(dev
, &dev_attr_port_number
);
73 if (driver
->port_remove
)
74 retval
= driver
->port_remove(port
);
79 tty_register_device(usb_serial_tty_driver
, minor
, dev
);
80 dev_info(&port
->serial
->dev
->dev
,
81 "%s converter now attached to ttyUSB%d\n",
82 driver
->description
, minor
);
88 static int usb_serial_device_remove(struct device
*dev
)
90 struct usb_serial_driver
*driver
;
91 struct usb_serial_port
*port
;
95 port
= to_usb_serial_port(dev
);
99 device_remove_file(&port
->dev
, &dev_attr_port_number
);
101 driver
= port
->serial
->type
;
102 if (driver
->port_remove
)
103 retval
= driver
->port_remove(port
);
105 minor
= port
->number
;
106 tty_unregister_device(usb_serial_tty_driver
, minor
);
107 dev_info(dev
, "%s converter now disconnected from ttyUSB%d\n",
108 driver
->description
, minor
);
113 #ifdef CONFIG_HOTPLUG
114 static ssize_t
store_new_id(struct device_driver
*driver
,
115 const char *buf
, size_t count
)
117 struct usb_serial_driver
*usb_drv
= to_usb_serial_driver(driver
);
118 ssize_t retval
= usb_store_new_id(&usb_drv
->dynids
, driver
, buf
, count
);
120 if (retval
>= 0 && usb_drv
->usb_driver
!= NULL
)
121 retval
= usb_store_new_id(&usb_drv
->usb_driver
->dynids
,
122 &usb_drv
->usb_driver
->drvwrap
.driver
,
127 static ssize_t
show_dynids(struct device_driver
*driver
, char *buf
)
129 struct usb_serial_driver
*usb_drv
= to_usb_serial_driver(driver
);
131 return usb_show_dynids(&usb_drv
->dynids
, buf
);
134 static struct driver_attribute drv_attrs
[] = {
135 __ATTR(new_id
, S_IRUGO
| S_IWUSR
, show_dynids
, store_new_id
),
139 static void free_dynids(struct usb_serial_driver
*drv
)
141 struct usb_dynid
*dynid
, *n
;
143 spin_lock(&drv
->dynids
.lock
);
144 list_for_each_entry_safe(dynid
, n
, &drv
->dynids
.list
, node
) {
145 list_del(&dynid
->node
);
148 spin_unlock(&drv
->dynids
.lock
);
152 static struct driver_attribute drv_attrs
[] = {
155 static inline void free_dynids(struct usb_serial_driver
*drv
)
160 struct bus_type usb_serial_bus_type
= {
161 .name
= "usb-serial",
162 .match
= usb_serial_device_match
,
163 .probe
= usb_serial_device_probe
,
164 .remove
= usb_serial_device_remove
,
165 .drv_attrs
= drv_attrs
,
168 int usb_serial_bus_register(struct usb_serial_driver
*driver
)
172 driver
->driver
.bus
= &usb_serial_bus_type
;
173 spin_lock_init(&driver
->dynids
.lock
);
174 INIT_LIST_HEAD(&driver
->dynids
.list
);
176 retval
= driver_register(&driver
->driver
);
181 void usb_serial_bus_deregister(struct usb_serial_driver
*driver
)
184 driver_unregister(&driver
->driver
);