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; | |
c14829fa | 100 | int autopm_err; |
1da177e4 LT |
101 | |
102 | port = to_usb_serial_port(dev); | |
c97611c1 | 103 | if (!port) |
1da177e4 | 104 | return -ENODEV; |
1da177e4 | 105 | |
c14829fa JH |
106 | /* |
107 | * Make sure suspend/resume doesn't race against port_remove. | |
108 | * | |
109 | * Note that no further runtime PM callbacks will be made if | |
110 | * autopm_get fails. | |
111 | */ | |
112 | autopm_err = usb_autopm_get_interface(port->serial->interface); | |
d5fd650c | 113 | |
1143832e | 114 | minor = port->minor; |
5cb27dde JH |
115 | tty_unregister_device(usb_serial_tty_driver, minor); |
116 | ||
ce0d9325 RK |
117 | device_remove_file(&port->dev, &dev_attr_port_number); |
118 | ||
1da177e4 | 119 | driver = port->serial->type; |
c706ebdf | 120 | if (driver->port_remove) |
c97611c1 | 121 | retval = driver->port_remove(port); |
c706ebdf | 122 | |
1da177e4 | 123 | dev_info(dev, "%s converter now disconnected from ttyUSB%d\n", |
269bda1c | 124 | driver->description, minor); |
1da177e4 | 125 | |
c14829fa JH |
126 | if (!autopm_err) |
127 | usb_autopm_put_interface(port->serial->interface); | |
128 | ||
1da177e4 LT |
129 | return retval; |
130 | } | |
131 | ||
d13a280f | 132 | static ssize_t new_id_store(struct device_driver *driver, |
93bacefc GKH |
133 | const char *buf, size_t count) |
134 | { | |
135 | struct usb_serial_driver *usb_drv = to_usb_serial_driver(driver); | |
2fc82c2d WS |
136 | ssize_t retval = usb_store_new_id(&usb_drv->dynids, usb_drv->id_table, |
137 | driver, buf, count); | |
93bacefc GKH |
138 | |
139 | if (retval >= 0 && usb_drv->usb_driver != NULL) | |
140 | retval = usb_store_new_id(&usb_drv->usb_driver->dynids, | |
2fc82c2d | 141 | usb_drv->usb_driver->id_table, |
93bacefc GKH |
142 | &usb_drv->usb_driver->drvwrap.driver, |
143 | buf, count); | |
144 | return retval; | |
145 | } | |
146 | ||
d13a280f | 147 | static ssize_t new_id_show(struct device_driver *driver, char *buf) |
ef206f3f BM |
148 | { |
149 | struct usb_serial_driver *usb_drv = to_usb_serial_driver(driver); | |
150 | ||
151 | return usb_show_dynids(&usb_drv->dynids, buf); | |
152 | } | |
d13a280f | 153 | static DRIVER_ATTR_RW(new_id); |
ef206f3f | 154 | |
d13a280f GKH |
155 | static struct attribute *usb_serial_drv_attrs[] = { |
156 | &driver_attr_new_id.attr, | |
157 | NULL, | |
93bacefc | 158 | }; |
d13a280f | 159 | ATTRIBUTE_GROUPS(usb_serial_drv); |
93bacefc GKH |
160 | |
161 | static void free_dynids(struct usb_serial_driver *drv) | |
162 | { | |
163 | struct usb_dynid *dynid, *n; | |
164 | ||
165 | spin_lock(&drv->dynids.lock); | |
166 | list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { | |
167 | list_del(&dynid->node); | |
168 | kfree(dynid); | |
169 | } | |
170 | spin_unlock(&drv->dynids.lock); | |
171 | } | |
172 | ||
ac33bc3d RK |
173 | struct bus_type usb_serial_bus_type = { |
174 | .name = "usb-serial", | |
175 | .match = usb_serial_device_match, | |
176 | .probe = usb_serial_device_probe, | |
177 | .remove = usb_serial_device_remove, | |
d13a280f | 178 | .drv_groups = usb_serial_drv_groups, |
ac33bc3d RK |
179 | }; |
180 | ||
ea65370d | 181 | int usb_serial_bus_register(struct usb_serial_driver *driver) |
1da177e4 LT |
182 | { |
183 | int retval; | |
184 | ||
ea65370d | 185 | driver->driver.bus = &usb_serial_bus_type; |
93bacefc GKH |
186 | spin_lock_init(&driver->dynids.lock); |
187 | INIT_LIST_HEAD(&driver->dynids.list); | |
188 | ||
ea65370d | 189 | retval = driver_register(&driver->driver); |
1da177e4 LT |
190 | |
191 | return retval; | |
192 | } | |
193 | ||
ea65370d | 194 | void usb_serial_bus_deregister(struct usb_serial_driver *driver) |
1da177e4 | 195 | { |
93bacefc | 196 | free_dynids(driver); |
ea65370d | 197 | driver_unregister(&driver->driver); |
1da177e4 LT |
198 | } |
199 |