Commit | Line | Data |
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1da177e4 LT |
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 | ||
1da177e4 LT |
11 | #include <linux/kernel.h> |
12 | #include <linux/errno.h> | |
13 | #include <linux/tty.h> | |
5a0e3ad6 | 14 | #include <linux/slab.h> |
1da177e4 LT |
15 | #include <linux/module.h> |
16 | #include <linux/usb.h> | |
a969888c | 17 | #include <linux/usb/serial.h> |
1da177e4 | 18 | |
c97611c1 AC |
19 | static int usb_serial_device_match(struct device *dev, |
20 | struct device_driver *drv) | |
1da177e4 | 21 | { |
ea65370d | 22 | struct usb_serial_driver *driver; |
1da177e4 LT |
23 | const struct usb_serial_port *port; |
24 | ||
25 | /* | |
26 | * drivers are already assigned to ports in serial_probe so it's | |
27 | * a simple check here. | |
28 | */ | |
29 | port = to_usb_serial_port(dev); | |
30 | if (!port) | |
31 | return 0; | |
32 | ||
33 | driver = to_usb_serial_driver(drv); | |
34 | ||
35 | if (driver == port->serial->type) | |
36 | return 1; | |
37 | ||
38 | return 0; | |
39 | } | |
40 | ||
154547c4 | 41 | static ssize_t port_number_show(struct device *dev, |
ce0d9325 RK |
42 | struct device_attribute *attr, char *buf) |
43 | { | |
44 | struct usb_serial_port *port = to_usb_serial_port(dev); | |
45 | ||
1143832e | 46 | return sprintf(buf, "%d\n", port->port_number); |
ce0d9325 | 47 | } |
154547c4 | 48 | static DEVICE_ATTR_RO(port_number); |
ce0d9325 | 49 | |
c97611c1 | 50 | static int usb_serial_device_probe(struct device *dev) |
1da177e4 | 51 | { |
ea65370d | 52 | struct usb_serial_driver *driver; |
1da177e4 LT |
53 | struct usb_serial_port *port; |
54 | int retval = 0; | |
55 | int minor; | |
56 | ||
57 | port = to_usb_serial_port(dev); | |
58 | if (!port) { | |
59 | retval = -ENODEV; | |
60 | goto exit; | |
61 | } | |
62 | ||
d5fd650c BM |
63 | /* make sure suspend/resume doesn't race against port_probe */ |
64 | retval = usb_autopm_get_interface(port->serial->interface); | |
65 | if (retval) | |
66 | goto exit; | |
67 | ||
1da177e4 LT |
68 | driver = port->serial->type; |
69 | if (driver->port_probe) { | |
c97611c1 | 70 | retval = driver->port_probe(port); |
1da177e4 | 71 | if (retval) |
d5fd650c | 72 | goto exit_with_autopm; |
1da177e4 LT |
73 | } |
74 | ||
ce0d9325 | 75 | retval = device_create_file(dev, &dev_attr_port_number); |
c706ebdf AS |
76 | if (retval) { |
77 | if (driver->port_remove) | |
78 | retval = driver->port_remove(port); | |
d5fd650c | 79 | goto exit_with_autopm; |
c706ebdf | 80 | } |
ce0d9325 | 81 | |
1143832e | 82 | minor = port->minor; |
c97611c1 AC |
83 | tty_register_device(usb_serial_tty_driver, minor, dev); |
84 | dev_info(&port->serial->dev->dev, | |
1da177e4 | 85 | "%s converter now attached to ttyUSB%d\n", |
269bda1c | 86 | driver->description, minor); |
1da177e4 | 87 | |
d5fd650c BM |
88 | exit_with_autopm: |
89 | usb_autopm_put_interface(port->serial->interface); | |
1da177e4 LT |
90 | exit: |
91 | return retval; | |
92 | } | |
93 | ||
c97611c1 | 94 | static int usb_serial_device_remove(struct device *dev) |
1da177e4 | 95 | { |
ea65370d | 96 | struct usb_serial_driver *driver; |
1da177e4 LT |
97 | struct usb_serial_port *port; |
98 | int retval = 0; | |
99 | int minor; | |
100 | ||
101 | port = to_usb_serial_port(dev); | |
c97611c1 | 102 | if (!port) |
1da177e4 | 103 | return -ENODEV; |
1da177e4 | 104 | |
d5fd650c BM |
105 | /* make sure suspend/resume doesn't race against port_remove */ |
106 | usb_autopm_get_interface(port->serial->interface); | |
107 | ||
1143832e | 108 | minor = port->minor; |
5cb27dde JH |
109 | tty_unregister_device(usb_serial_tty_driver, minor); |
110 | ||
ce0d9325 RK |
111 | device_remove_file(&port->dev, &dev_attr_port_number); |
112 | ||
1da177e4 | 113 | driver = port->serial->type; |
c706ebdf | 114 | if (driver->port_remove) |
c97611c1 | 115 | retval = driver->port_remove(port); |
c706ebdf | 116 | |
1da177e4 | 117 | dev_info(dev, "%s converter now disconnected from ttyUSB%d\n", |
269bda1c | 118 | driver->description, minor); |
1da177e4 | 119 | |
d5fd650c | 120 | usb_autopm_put_interface(port->serial->interface); |
1da177e4 LT |
121 | return retval; |
122 | } | |
123 | ||
d13a280f | 124 | static ssize_t new_id_store(struct device_driver *driver, |
93bacefc GKH |
125 | const char *buf, size_t count) |
126 | { | |
127 | struct usb_serial_driver *usb_drv = to_usb_serial_driver(driver); | |
128 | ssize_t retval = usb_store_new_id(&usb_drv->dynids, driver, buf, count); | |
129 | ||
130 | if (retval >= 0 && usb_drv->usb_driver != NULL) | |
131 | retval = usb_store_new_id(&usb_drv->usb_driver->dynids, | |
132 | &usb_drv->usb_driver->drvwrap.driver, | |
133 | buf, count); | |
134 | return retval; | |
135 | } | |
136 | ||
d13a280f | 137 | static ssize_t new_id_show(struct device_driver *driver, char *buf) |
ef206f3f BM |
138 | { |
139 | struct usb_serial_driver *usb_drv = to_usb_serial_driver(driver); | |
140 | ||
141 | return usb_show_dynids(&usb_drv->dynids, buf); | |
142 | } | |
d13a280f | 143 | static DRIVER_ATTR_RW(new_id); |
ef206f3f | 144 | |
d13a280f GKH |
145 | static struct attribute *usb_serial_drv_attrs[] = { |
146 | &driver_attr_new_id.attr, | |
147 | NULL, | |
93bacefc | 148 | }; |
d13a280f | 149 | ATTRIBUTE_GROUPS(usb_serial_drv); |
93bacefc GKH |
150 | |
151 | static void free_dynids(struct usb_serial_driver *drv) | |
152 | { | |
153 | struct usb_dynid *dynid, *n; | |
154 | ||
155 | spin_lock(&drv->dynids.lock); | |
156 | list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { | |
157 | list_del(&dynid->node); | |
158 | kfree(dynid); | |
159 | } | |
160 | spin_unlock(&drv->dynids.lock); | |
161 | } | |
162 | ||
ac33bc3d RK |
163 | struct bus_type usb_serial_bus_type = { |
164 | .name = "usb-serial", | |
165 | .match = usb_serial_device_match, | |
166 | .probe = usb_serial_device_probe, | |
167 | .remove = usb_serial_device_remove, | |
d13a280f | 168 | .drv_groups = usb_serial_drv_groups, |
ac33bc3d RK |
169 | }; |
170 | ||
ea65370d | 171 | int usb_serial_bus_register(struct usb_serial_driver *driver) |
1da177e4 LT |
172 | { |
173 | int retval; | |
174 | ||
ea65370d | 175 | driver->driver.bus = &usb_serial_bus_type; |
93bacefc GKH |
176 | spin_lock_init(&driver->dynids.lock); |
177 | INIT_LIST_HEAD(&driver->dynids.list); | |
178 | ||
ea65370d | 179 | retval = driver_register(&driver->driver); |
1da177e4 LT |
180 | |
181 | return retval; | |
182 | } | |
183 | ||
ea65370d | 184 | void usb_serial_bus_deregister(struct usb_serial_driver *driver) |
1da177e4 | 185 | { |
93bacefc | 186 | free_dynids(driver); |
ea65370d | 187 | driver_unregister(&driver->driver); |
1da177e4 LT |
188 | } |
189 |