Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * USB Serial Converter driver | |
3 | * | |
502b95c1 | 4 | * Copyright (C) 1999 - 2005 Greg Kroah-Hartman (greg@kroah.com) |
1da177e4 LT |
5 | * Copyright (C) 2000 Peter Berger (pberger@brimson.com) |
6 | * Copyright (C) 2000 Al Borchers (borchers@steinerpoint.com) | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License version | |
10 | * 2 as published by the Free Software Foundation. | |
11 | * | |
502b95c1 | 12 | * This driver was originally based on the ACM driver by Armin Fuerst (which was |
1da177e4 LT |
13 | * based on a driver by Brad Keryan) |
14 | * | |
a8d6f0a9 AC |
15 | * See Documentation/usb/usb-serial.txt for more information on using this |
16 | * driver | |
1da177e4 | 17 | * |
1da177e4 LT |
18 | */ |
19 | ||
1da177e4 LT |
20 | #include <linux/kernel.h> |
21 | #include <linux/errno.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/tty.h> | |
25 | #include <linux/tty_driver.h> | |
26 | #include <linux/tty_flip.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/moduleparam.h> | |
29 | #include <linux/spinlock.h> | |
1ce7dd26 | 30 | #include <linux/mutex.h> |
1da177e4 | 31 | #include <linux/list.h> |
a8d6f0a9 | 32 | #include <linux/uaccess.h> |
1da177e4 | 33 | #include <linux/usb.h> |
a969888c | 34 | #include <linux/usb/serial.h> |
1da177e4 LT |
35 | #include "pl2303.h" |
36 | ||
37 | /* | |
38 | * Version Information | |
39 | */ | |
1da177e4 LT |
40 | #define DRIVER_AUTHOR "Greg Kroah-Hartman, greg@kroah.com, http://www.kroah.com/linux/" |
41 | #define DRIVER_DESC "USB Serial Driver core" | |
42 | ||
34f8e761 PZ |
43 | static void port_free(struct usb_serial_port *port); |
44 | ||
1da177e4 LT |
45 | /* Driver structure we register with the USB core */ |
46 | static struct usb_driver usb_serial_driver = { | |
1da177e4 LT |
47 | .name = "usbserial", |
48 | .probe = usb_serial_probe, | |
49 | .disconnect = usb_serial_disconnect, | |
ec22559e ON |
50 | .suspend = usb_serial_suspend, |
51 | .resume = usb_serial_resume, | |
ba9dc657 | 52 | .no_dynamic_id = 1, |
1da177e4 LT |
53 | }; |
54 | ||
55 | /* There is no MODULE_DEVICE_TABLE for usbserial.c. Instead | |
56 | the MODULE_DEVICE_TABLE declarations in each serial driver | |
57 | cause the "hotplug" program to pull in whatever module is necessary | |
58 | via modprobe, and modprobe will load usbserial because the serial | |
59 | drivers depend on it. | |
60 | */ | |
61 | ||
62 | static int debug; | |
a8d6f0a9 AC |
63 | /* initially all NULL */ |
64 | static struct usb_serial *serial_table[SERIAL_TTY_MINORS]; | |
3ddad823 | 65 | static DEFINE_MUTEX(table_lock); |
1da177e4 LT |
66 | static LIST_HEAD(usb_serial_driver_list); |
67 | ||
68 | struct usb_serial *usb_serial_get_by_index(unsigned index) | |
69 | { | |
34ef50e5 ON |
70 | struct usb_serial *serial; |
71 | ||
3ddad823 | 72 | mutex_lock(&table_lock); |
34ef50e5 | 73 | serial = serial_table[index]; |
1da177e4 LT |
74 | |
75 | if (serial) | |
76 | kref_get(&serial->kref); | |
3ddad823 | 77 | mutex_unlock(&table_lock); |
1da177e4 LT |
78 | return serial; |
79 | } | |
80 | ||
a8d6f0a9 AC |
81 | static struct usb_serial *get_free_serial(struct usb_serial *serial, |
82 | int num_ports, unsigned int *minor) | |
1da177e4 LT |
83 | { |
84 | unsigned int i, j; | |
85 | int good_spot; | |
86 | ||
441b62c1 | 87 | dbg("%s %d", __func__, num_ports); |
1da177e4 LT |
88 | |
89 | *minor = 0; | |
3ddad823 | 90 | mutex_lock(&table_lock); |
1da177e4 LT |
91 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) { |
92 | if (serial_table[i]) | |
93 | continue; | |
94 | ||
95 | good_spot = 1; | |
96 | for (j = 1; j <= num_ports-1; ++j) | |
97 | if ((i+j >= SERIAL_TTY_MINORS) || (serial_table[i+j])) { | |
98 | good_spot = 0; | |
99 | i += j; | |
100 | break; | |
101 | } | |
102 | if (good_spot == 0) | |
103 | continue; | |
104 | ||
105 | *minor = i; | |
a1f721c8 | 106 | j = 0; |
441b62c1 | 107 | dbg("%s - minor base = %d", __func__, *minor); |
a1f721c8 | 108 | for (i = *minor; (i < (*minor + num_ports)) && (i < SERIAL_TTY_MINORS); ++i) { |
1da177e4 | 109 | serial_table[i] = serial; |
a1f721c8 ON |
110 | serial->port[j++]->number = i; |
111 | } | |
3ddad823 | 112 | mutex_unlock(&table_lock); |
1da177e4 LT |
113 | return serial; |
114 | } | |
3ddad823 | 115 | mutex_unlock(&table_lock); |
1da177e4 LT |
116 | return NULL; |
117 | } | |
118 | ||
119 | static void return_serial(struct usb_serial *serial) | |
120 | { | |
121 | int i; | |
122 | ||
441b62c1 | 123 | dbg("%s", __func__); |
1da177e4 | 124 | |
a8d6f0a9 | 125 | for (i = 0; i < serial->num_ports; ++i) |
1da177e4 | 126 | serial_table[serial->minor + i] = NULL; |
1da177e4 LT |
127 | } |
128 | ||
129 | static void destroy_serial(struct kref *kref) | |
130 | { | |
131 | struct usb_serial *serial; | |
132 | struct usb_serial_port *port; | |
133 | int i; | |
134 | ||
135 | serial = to_usb_serial(kref); | |
136 | ||
441b62c1 | 137 | dbg("%s - %s", __func__, serial->type->description); |
1da177e4 | 138 | |
521b85ae JR |
139 | serial->type->shutdown(serial); |
140 | ||
141 | /* return the minor range that this device had */ | |
0282b7f2 AS |
142 | if (serial->minor != SERIAL_TTY_NO_MINOR) |
143 | return_serial(serial); | |
521b85ae | 144 | |
1da177e4 | 145 | for (i = 0; i < serial->num_ports; ++i) |
95da310e | 146 | serial->port[i]->port.count = 0; |
1da177e4 LT |
147 | |
148 | /* the ports are cleaned up and released in port_release() */ | |
149 | for (i = 0; i < serial->num_ports; ++i) | |
150 | if (serial->port[i]->dev.parent != NULL) { | |
151 | device_unregister(&serial->port[i]->dev); | |
152 | serial->port[i] = NULL; | |
153 | } | |
154 | ||
155 | /* If this is a "fake" port, we have to clean it up here, as it will | |
156 | * not get cleaned up in port_release() as it was never registered with | |
157 | * the driver core */ | |
158 | if (serial->num_ports < serial->num_port_pointers) { | |
a8d6f0a9 AC |
159 | for (i = serial->num_ports; |
160 | i < serial->num_port_pointers; ++i) { | |
1da177e4 LT |
161 | port = serial->port[i]; |
162 | if (!port) | |
163 | continue; | |
34f8e761 | 164 | port_free(port); |
1da177e4 LT |
165 | } |
166 | } | |
167 | ||
168 | usb_put_dev(serial->dev); | |
169 | ||
170 | /* free up any memory that we allocated */ | |
a8d6f0a9 | 171 | kfree(serial); |
1da177e4 LT |
172 | } |
173 | ||
73e487fd GL |
174 | void usb_serial_put(struct usb_serial *serial) |
175 | { | |
3ddad823 | 176 | mutex_lock(&table_lock); |
73e487fd | 177 | kref_put(&serial->kref, destroy_serial); |
3ddad823 | 178 | mutex_unlock(&table_lock); |
73e487fd GL |
179 | } |
180 | ||
1da177e4 LT |
181 | /***************************************************************************** |
182 | * Driver tty interface functions | |
183 | *****************************************************************************/ | |
a8d6f0a9 | 184 | static int serial_open (struct tty_struct *tty, struct file *filp) |
1da177e4 LT |
185 | { |
186 | struct usb_serial *serial; | |
187 | struct usb_serial_port *port; | |
188 | unsigned int portNumber; | |
189 | int retval; | |
a8d6f0a9 | 190 | |
441b62c1 | 191 | dbg("%s", __func__); |
1da177e4 LT |
192 | |
193 | /* get the serial object associated with this tty pointer */ | |
194 | serial = usb_serial_get_by_index(tty->index); | |
195 | if (!serial) { | |
196 | tty->driver_data = NULL; | |
197 | return -ENODEV; | |
198 | } | |
199 | ||
200 | portNumber = tty->index - serial->minor; | |
201 | port = serial->port[portNumber]; | |
71a84163 LFC |
202 | if (!port) { |
203 | retval = -ENODEV; | |
204 | goto bailout_kref_put; | |
205 | } | |
8a4613f0 | 206 | |
71a84163 LFC |
207 | if (mutex_lock_interruptible(&port->mutex)) { |
208 | retval = -ERESTARTSYS; | |
209 | goto bailout_kref_put; | |
210 | } | |
a8d6f0a9 | 211 | |
95da310e | 212 | ++port->port.count; |
1da177e4 | 213 | |
ca85485c PF |
214 | /* set up our port structure making the tty driver |
215 | * remember our port object, and us it */ | |
216 | tty->driver_data = port; | |
4a90f09b | 217 | tty_port_tty_set(&port->port, tty); |
1da177e4 | 218 | |
95da310e | 219 | if (port->port.count == 1) { |
1da177e4 LT |
220 | |
221 | /* lock this module before we call it | |
222 | * this may fail, which means we must bail out, | |
223 | * safe because we are called with BKL held */ | |
18fcac35 | 224 | if (!try_module_get(serial->type->driver.owner)) { |
1da177e4 | 225 | retval = -ENODEV; |
71a84163 | 226 | goto bailout_mutex_unlock; |
1da177e4 LT |
227 | } |
228 | ||
f0fbd5b9 SS |
229 | retval = usb_autopm_get_interface(serial->interface); |
230 | if (retval) | |
231 | goto bailout_module_put; | |
a8d6f0a9 | 232 | /* only call the device specific open if this |
1da177e4 | 233 | * is the first time the port is opened */ |
95da310e | 234 | retval = serial->type->open(tty, port, filp); |
1da177e4 | 235 | if (retval) |
f0fbd5b9 | 236 | goto bailout_interface_put; |
1da177e4 LT |
237 | } |
238 | ||
1ce7dd26 | 239 | mutex_unlock(&port->mutex); |
1da177e4 LT |
240 | return 0; |
241 | ||
f0fbd5b9 SS |
242 | bailout_interface_put: |
243 | usb_autopm_put_interface(serial->interface); | |
1da177e4 | 244 | bailout_module_put: |
18fcac35 | 245 | module_put(serial->type->driver.owner); |
71a84163 | 246 | bailout_mutex_unlock: |
95da310e | 247 | port->port.count = 0; |
b059c81a | 248 | tty->driver_data = NULL; |
4a90f09b | 249 | tty_port_tty_set(&port->port, NULL); |
1ce7dd26 | 250 | mutex_unlock(&port->mutex); |
71a84163 | 251 | bailout_kref_put: |
73e487fd | 252 | usb_serial_put(serial); |
1da177e4 LT |
253 | return retval; |
254 | } | |
255 | ||
a8d6f0a9 | 256 | static void serial_close(struct tty_struct *tty, struct file *filp) |
1da177e4 | 257 | { |
81671ddb | 258 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
259 | |
260 | if (!port) | |
261 | return; | |
262 | ||
441b62c1 | 263 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 264 | |
1ce7dd26 | 265 | mutex_lock(&port->mutex); |
8a4613f0 | 266 | |
95da310e | 267 | if (port->port.count == 0) { |
1ce7dd26 | 268 | mutex_unlock(&port->mutex); |
91c0bce2 GKH |
269 | return; |
270 | } | |
1da177e4 | 271 | |
95da310e AC |
272 | --port->port.count; |
273 | if (port->port.count == 0) | |
a8d6f0a9 | 274 | /* only call the device specific close if this |
1da177e4 | 275 | * port is being closed by the last owner */ |
95da310e | 276 | port->serial->type->close(tty, port, filp); |
1da177e4 | 277 | |
95da310e | 278 | if (port->port.count == (port->console? 1 : 0)) { |
4a90f09b AC |
279 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
280 | if (tty) { | |
281 | if (tty->driver_data) | |
282 | tty->driver_data = NULL; | |
283 | tty_port_tty_set(&port->port, NULL); | |
1da177e4 | 284 | } |
9a6b1efa | 285 | } |
1da177e4 | 286 | |
95da310e | 287 | if (port->port.count == 0) { |
62ad296b ON |
288 | mutex_lock(&port->serial->disc_mutex); |
289 | if (!port->serial->disconnected) | |
290 | usb_autopm_put_interface(port->serial->interface); | |
291 | mutex_unlock(&port->serial->disc_mutex); | |
18fcac35 | 292 | module_put(port->serial->type->driver.owner); |
f0fbd5b9 | 293 | } |
1da177e4 | 294 | |
1ce7dd26 | 295 | mutex_unlock(&port->mutex); |
73e487fd | 296 | usb_serial_put(port->serial); |
1da177e4 LT |
297 | } |
298 | ||
a8d6f0a9 AC |
299 | static int serial_write(struct tty_struct *tty, const unsigned char *buf, |
300 | int count) | |
1da177e4 | 301 | { |
81671ddb | 302 | struct usb_serial_port *port = tty->driver_data; |
3ff4fd94 | 303 | int retval = -ENODEV; |
1da177e4 | 304 | |
f34d7a5b | 305 | if (port->serial->dev->state == USB_STATE_NOTATTACHED) |
487f9c67 LFC |
306 | goto exit; |
307 | ||
441b62c1 | 308 | dbg("%s - port %d, %d byte(s)", __func__, port->number, count); |
1da177e4 | 309 | |
95da310e | 310 | /* count is managed under the mutex lock for the tty so cannot |
a8d6f0a9 | 311 | drop to zero until after the last close completes */ |
95da310e | 312 | WARN_ON(!port->port.count); |
1da177e4 LT |
313 | |
314 | /* pass on to the driver specific version of this function */ | |
95da310e | 315 | retval = port->serial->type->write(tty, port, buf, count); |
1da177e4 LT |
316 | |
317 | exit: | |
318 | return retval; | |
319 | } | |
320 | ||
a8d6f0a9 | 321 | static int serial_write_room(struct tty_struct *tty) |
1da177e4 | 322 | { |
81671ddb | 323 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 324 | dbg("%s - port %d", __func__, port->number); |
95da310e | 325 | WARN_ON(!port->port.count); |
1da177e4 | 326 | /* pass on to the driver specific version of this function */ |
95da310e | 327 | return port->serial->type->write_room(tty); |
1da177e4 LT |
328 | } |
329 | ||
a8d6f0a9 | 330 | static int serial_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 331 | { |
81671ddb | 332 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 333 | dbg("%s = port %d", __func__, port->number); |
1da177e4 | 334 | |
95da310e | 335 | WARN_ON(!port->port.count); |
1da177e4 | 336 | /* pass on to the driver specific version of this function */ |
95da310e | 337 | return port->serial->type->chars_in_buffer(tty); |
1da177e4 LT |
338 | } |
339 | ||
a8d6f0a9 | 340 | static void serial_throttle(struct tty_struct *tty) |
1da177e4 | 341 | { |
81671ddb | 342 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 343 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 344 | |
95da310e | 345 | WARN_ON(!port->port.count); |
1da177e4 LT |
346 | /* pass on to the driver specific version of this function */ |
347 | if (port->serial->type->throttle) | |
95da310e | 348 | port->serial->type->throttle(tty); |
1da177e4 LT |
349 | } |
350 | ||
a8d6f0a9 | 351 | static void serial_unthrottle(struct tty_struct *tty) |
1da177e4 | 352 | { |
81671ddb | 353 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 354 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 355 | |
95da310e | 356 | WARN_ON(!port->port.count); |
1da177e4 LT |
357 | /* pass on to the driver specific version of this function */ |
358 | if (port->serial->type->unthrottle) | |
95da310e | 359 | port->serial->type->unthrottle(tty); |
1da177e4 LT |
360 | } |
361 | ||
a8d6f0a9 AC |
362 | static int serial_ioctl(struct tty_struct *tty, struct file *file, |
363 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 364 | { |
81671ddb | 365 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 LT |
366 | int retval = -ENODEV; |
367 | ||
441b62c1 | 368 | dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd); |
1da177e4 | 369 | |
95da310e | 370 | WARN_ON(!port->port.count); |
1da177e4 | 371 | |
a8d6f0a9 AC |
372 | /* pass on to the driver specific version of this function |
373 | if it is available */ | |
f34d7a5b AC |
374 | if (port->serial->type->ioctl) { |
375 | lock_kernel(); | |
95da310e | 376 | retval = port->serial->type->ioctl(tty, file, cmd, arg); |
f34d7a5b | 377 | unlock_kernel(); |
a8d6f0a9 | 378 | } else |
1da177e4 | 379 | retval = -ENOIOCTLCMD; |
1da177e4 LT |
380 | return retval; |
381 | } | |
382 | ||
a8d6f0a9 | 383 | static void serial_set_termios(struct tty_struct *tty, struct ktermios *old) |
1da177e4 | 384 | { |
81671ddb | 385 | struct usb_serial_port *port = tty->driver_data; |
441b62c1 | 386 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 387 | |
95da310e | 388 | WARN_ON(!port->port.count); |
a8d6f0a9 AC |
389 | /* pass on to the driver specific version of this function |
390 | if it is available */ | |
1da177e4 | 391 | if (port->serial->type->set_termios) |
95da310e | 392 | port->serial->type->set_termios(tty, port, old); |
33785091 AC |
393 | else |
394 | tty_termios_copy_hw(tty->termios, old); | |
1da177e4 LT |
395 | } |
396 | ||
9e98966c | 397 | static int serial_break(struct tty_struct *tty, int break_state) |
1da177e4 | 398 | { |
81671ddb | 399 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 400 | |
441b62c1 | 401 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 402 | |
95da310e | 403 | WARN_ON(!port->port.count); |
a8d6f0a9 AC |
404 | /* pass on to the driver specific version of this function |
405 | if it is available */ | |
f34d7a5b AC |
406 | if (port->serial->type->break_ctl) { |
407 | lock_kernel(); | |
95da310e | 408 | port->serial->type->break_ctl(tty, break_state); |
f34d7a5b AC |
409 | unlock_kernel(); |
410 | } | |
9e98966c | 411 | return 0; |
1da177e4 LT |
412 | } |
413 | ||
a8d6f0a9 AC |
414 | static int serial_read_proc(char *page, char **start, off_t off, int count, |
415 | int *eof, void *data) | |
1da177e4 LT |
416 | { |
417 | struct usb_serial *serial; | |
418 | int length = 0; | |
419 | int i; | |
420 | off_t begin = 0; | |
421 | char tmp[40]; | |
422 | ||
441b62c1 | 423 | dbg("%s", __func__); |
a8d6f0a9 | 424 | length += sprintf(page, "usbserinfo:1.0 driver:2.0\n"); |
1da177e4 LT |
425 | for (i = 0; i < SERIAL_TTY_MINORS && length < PAGE_SIZE; ++i) { |
426 | serial = usb_serial_get_by_index(i); | |
427 | if (serial == NULL) | |
428 | continue; | |
429 | ||
a8d6f0a9 | 430 | length += sprintf(page+length, "%d:", i); |
18fcac35 | 431 | if (serial->type->driver.owner) |
a8d6f0a9 AC |
432 | length += sprintf(page+length, " module:%s", |
433 | module_name(serial->type->driver.owner)); | |
434 | length += sprintf(page+length, " name:\"%s\"", | |
435 | serial->type->description); | |
436 | length += sprintf(page+length, " vendor:%04x product:%04x", | |
437 | le16_to_cpu(serial->dev->descriptor.idVendor), | |
438 | le16_to_cpu(serial->dev->descriptor.idProduct)); | |
439 | length += sprintf(page+length, " num_ports:%d", | |
440 | serial->num_ports); | |
441 | length += sprintf(page+length, " port:%d", | |
442 | i - serial->minor + 1); | |
1da177e4 | 443 | usb_make_path(serial->dev, tmp, sizeof(tmp)); |
a8d6f0a9 AC |
444 | length += sprintf(page+length, " path:%s", tmp); |
445 | ||
446 | length += sprintf(page+length, "\n"); | |
59925838 MU |
447 | if ((length + begin) > (off + count)) { |
448 | usb_serial_put(serial); | |
1da177e4 | 449 | goto done; |
59925838 | 450 | } |
1da177e4 LT |
451 | if ((length + begin) < off) { |
452 | begin += length; | |
453 | length = 0; | |
454 | } | |
73e487fd | 455 | usb_serial_put(serial); |
1da177e4 LT |
456 | } |
457 | *eof = 1; | |
458 | done: | |
459 | if (off >= (length + begin)) | |
460 | return 0; | |
461 | *start = page + (off-begin); | |
a8d6f0a9 | 462 | return (count < begin+length-off) ? count : begin+length-off; |
1da177e4 LT |
463 | } |
464 | ||
a8d6f0a9 | 465 | static int serial_tiocmget(struct tty_struct *tty, struct file *file) |
1da177e4 | 466 | { |
81671ddb | 467 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 468 | |
441b62c1 | 469 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 470 | |
95da310e | 471 | WARN_ON(!port->port.count); |
1da177e4 | 472 | if (port->serial->type->tiocmget) |
95da310e | 473 | return port->serial->type->tiocmget(tty, file); |
1da177e4 LT |
474 | return -EINVAL; |
475 | } | |
476 | ||
a8d6f0a9 | 477 | static int serial_tiocmset(struct tty_struct *tty, struct file *file, |
1da177e4 LT |
478 | unsigned int set, unsigned int clear) |
479 | { | |
81671ddb | 480 | struct usb_serial_port *port = tty->driver_data; |
1da177e4 | 481 | |
441b62c1 | 482 | dbg("%s - port %d", __func__, port->number); |
1da177e4 | 483 | |
95da310e | 484 | WARN_ON(!port->port.count); |
1da177e4 | 485 | if (port->serial->type->tiocmset) |
95da310e | 486 | return port->serial->type->tiocmset(tty, file, set, clear); |
1da177e4 LT |
487 | return -EINVAL; |
488 | } | |
489 | ||
cf2c7481 PZ |
490 | /* |
491 | * We would be calling tty_wakeup here, but unfortunately some line | |
492 | * disciplines have an annoying habit of calling tty->write from | |
493 | * the write wakeup callback (e.g. n_hdlc.c). | |
494 | */ | |
495 | void usb_serial_port_softint(struct usb_serial_port *port) | |
496 | { | |
497 | schedule_work(&port->work); | |
498 | } | |
a8d6f0a9 | 499 | EXPORT_SYMBOL_GPL(usb_serial_port_softint); |
cf2c7481 | 500 | |
c4028958 | 501 | static void usb_serial_port_work(struct work_struct *work) |
1da177e4 | 502 | { |
c4028958 DH |
503 | struct usb_serial_port *port = |
504 | container_of(work, struct usb_serial_port, work); | |
1da177e4 LT |
505 | struct tty_struct *tty; |
506 | ||
441b62c1 | 507 | dbg("%s - port %d", __func__, port->number); |
a8d6f0a9 | 508 | |
1da177e4 LT |
509 | if (!port) |
510 | return; | |
511 | ||
4a90f09b | 512 | tty = tty_port_tty_get(&port->port); |
1da177e4 LT |
513 | if (!tty) |
514 | return; | |
515 | ||
516 | tty_wakeup(tty); | |
4a90f09b | 517 | tty_kref_put(tty); |
1da177e4 LT |
518 | } |
519 | ||
520 | static void port_release(struct device *dev) | |
521 | { | |
522 | struct usb_serial_port *port = to_usb_serial_port(dev); | |
523 | ||
7071a3ce | 524 | dbg ("%s - %s", __func__, dev_name(dev)); |
34f8e761 PZ |
525 | port_free(port); |
526 | } | |
527 | ||
34ef50e5 | 528 | static void kill_traffic(struct usb_serial_port *port) |
34f8e761 | 529 | { |
1da177e4 | 530 | usb_kill_urb(port->read_urb); |
1da177e4 | 531 | usb_kill_urb(port->write_urb); |
5adceac5 ON |
532 | /* |
533 | * This is tricky. | |
534 | * Some drivers submit the read_urb in the | |
535 | * handler for the write_urb or vice versa | |
536 | * this order determines the order in which | |
537 | * usb_kill_urb() must be used to reliably | |
538 | * kill the URBs. As it is unknown here, | |
539 | * both orders must be used in turn. | |
540 | * The call below is not redundant. | |
541 | */ | |
542 | usb_kill_urb(port->read_urb); | |
1da177e4 | 543 | usb_kill_urb(port->interrupt_in_urb); |
1da177e4 | 544 | usb_kill_urb(port->interrupt_out_urb); |
34ef50e5 ON |
545 | } |
546 | ||
547 | static void port_free(struct usb_serial_port *port) | |
548 | { | |
549 | kill_traffic(port); | |
550 | usb_free_urb(port->read_urb); | |
551 | usb_free_urb(port->write_urb); | |
552 | usb_free_urb(port->interrupt_in_urb); | |
1da177e4 LT |
553 | usb_free_urb(port->interrupt_out_urb); |
554 | kfree(port->bulk_in_buffer); | |
555 | kfree(port->bulk_out_buffer); | |
556 | kfree(port->interrupt_in_buffer); | |
557 | kfree(port->interrupt_out_buffer); | |
34f8e761 | 558 | flush_scheduled_work(); /* port->work */ |
1da177e4 LT |
559 | kfree(port); |
560 | } | |
561 | ||
a8d6f0a9 AC |
562 | static struct usb_serial *create_serial(struct usb_device *dev, |
563 | struct usb_interface *interface, | |
564 | struct usb_serial_driver *driver) | |
1da177e4 LT |
565 | { |
566 | struct usb_serial *serial; | |
567 | ||
80b6ca48 | 568 | serial = kzalloc(sizeof(*serial), GFP_KERNEL); |
1da177e4 | 569 | if (!serial) { |
441b62c1 | 570 | dev_err(&dev->dev, "%s - out of memory\n", __func__); |
1da177e4 LT |
571 | return NULL; |
572 | } | |
1da177e4 | 573 | serial->dev = usb_get_dev(dev); |
ea65370d | 574 | serial->type = driver; |
1da177e4 LT |
575 | serial->interface = interface; |
576 | kref_init(&serial->kref); | |
a1cd7e99 | 577 | mutex_init(&serial->disc_mutex); |
0282b7f2 | 578 | serial->minor = SERIAL_TTY_NO_MINOR; |
1da177e4 LT |
579 | |
580 | return serial; | |
581 | } | |
582 | ||
93bacefc | 583 | static const struct usb_device_id *match_dynamic_id(struct usb_interface *intf, |
a8d6f0a9 | 584 | struct usb_serial_driver *drv) |
93bacefc GKH |
585 | { |
586 | struct usb_dynid *dynid; | |
587 | ||
588 | spin_lock(&drv->dynids.lock); | |
589 | list_for_each_entry(dynid, &drv->dynids.list, node) { | |
590 | if (usb_match_one_id(intf, &dynid->id)) { | |
591 | spin_unlock(&drv->dynids.lock); | |
592 | return &dynid->id; | |
593 | } | |
594 | } | |
595 | spin_unlock(&drv->dynids.lock); | |
596 | return NULL; | |
597 | } | |
598 | ||
599 | static const struct usb_device_id *get_iface_id(struct usb_serial_driver *drv, | |
600 | struct usb_interface *intf) | |
601 | { | |
602 | const struct usb_device_id *id; | |
603 | ||
604 | id = usb_match_id(intf, drv->id_table); | |
605 | if (id) { | |
606 | dbg("static descriptor matches"); | |
607 | goto exit; | |
608 | } | |
609 | id = match_dynamic_id(intf, drv); | |
610 | if (id) | |
611 | dbg("dynamic descriptor matches"); | |
612 | exit: | |
613 | return id; | |
614 | } | |
615 | ||
a8d6f0a9 AC |
616 | static struct usb_serial_driver *search_serial_device( |
617 | struct usb_interface *iface) | |
1da177e4 | 618 | { |
1da177e4 | 619 | const struct usb_device_id *id; |
063a2da8 | 620 | struct usb_serial_driver *drv; |
1da177e4 | 621 | |
93b1fae4 | 622 | /* Check if the usb id matches a known device */ |
063a2da8 AS |
623 | list_for_each_entry(drv, &usb_serial_driver_list, driver_list) { |
624 | id = get_iface_id(drv, iface); | |
93bacefc | 625 | if (id) |
063a2da8 | 626 | return drv; |
1da177e4 LT |
627 | } |
628 | ||
629 | return NULL; | |
630 | } | |
631 | ||
632 | int usb_serial_probe(struct usb_interface *interface, | |
633 | const struct usb_device_id *id) | |
634 | { | |
a8d6f0a9 | 635 | struct usb_device *dev = interface_to_usbdev(interface); |
1da177e4 LT |
636 | struct usb_serial *serial = NULL; |
637 | struct usb_serial_port *port; | |
638 | struct usb_host_interface *iface_desc; | |
639 | struct usb_endpoint_descriptor *endpoint; | |
640 | struct usb_endpoint_descriptor *interrupt_in_endpoint[MAX_NUM_PORTS]; | |
641 | struct usb_endpoint_descriptor *interrupt_out_endpoint[MAX_NUM_PORTS]; | |
642 | struct usb_endpoint_descriptor *bulk_in_endpoint[MAX_NUM_PORTS]; | |
643 | struct usb_endpoint_descriptor *bulk_out_endpoint[MAX_NUM_PORTS]; | |
ea65370d | 644 | struct usb_serial_driver *type = NULL; |
1da177e4 | 645 | int retval; |
dd9ca5d9 | 646 | unsigned int minor; |
1da177e4 LT |
647 | int buffer_size; |
648 | int i; | |
649 | int num_interrupt_in = 0; | |
650 | int num_interrupt_out = 0; | |
651 | int num_bulk_in = 0; | |
652 | int num_bulk_out = 0; | |
653 | int num_ports = 0; | |
654 | int max_endpoints; | |
655 | ||
4b10f0f3 | 656 | lock_kernel(); /* guard against unloading a serial driver module */ |
1da177e4 LT |
657 | type = search_serial_device(interface); |
658 | if (!type) { | |
4b10f0f3 | 659 | unlock_kernel(); |
1da177e4 LT |
660 | dbg("none matched"); |
661 | return -ENODEV; | |
662 | } | |
663 | ||
a8d6f0a9 | 664 | serial = create_serial(dev, interface, type); |
1da177e4 | 665 | if (!serial) { |
4b10f0f3 | 666 | unlock_kernel(); |
441b62c1 | 667 | dev_err(&interface->dev, "%s - out of memory\n", __func__); |
1da177e4 LT |
668 | return -ENOMEM; |
669 | } | |
670 | ||
671 | /* if this device type has a probe function, call it */ | |
672 | if (type->probe) { | |
673 | const struct usb_device_id *id; | |
674 | ||
18fcac35 | 675 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 676 | unlock_kernel(); |
a8d6f0a9 AC |
677 | dev_err(&interface->dev, |
678 | "module get failed, exiting\n"); | |
679 | kfree(serial); | |
1da177e4 LT |
680 | return -EIO; |
681 | } | |
682 | ||
93bacefc | 683 | id = get_iface_id(type, interface); |
1da177e4 | 684 | retval = type->probe(serial, id); |
18fcac35 | 685 | module_put(type->driver.owner); |
1da177e4 LT |
686 | |
687 | if (retval) { | |
4b10f0f3 | 688 | unlock_kernel(); |
a8d6f0a9 AC |
689 | dbg("sub driver rejected device"); |
690 | kfree(serial); | |
1da177e4 LT |
691 | return retval; |
692 | } | |
693 | } | |
694 | ||
695 | /* descriptor matches, let's find the endpoints needed */ | |
696 | /* check out the endpoints */ | |
697 | iface_desc = interface->cur_altsetting; | |
698 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
699 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 LFC |
700 | |
701 | if (usb_endpoint_is_bulk_in(endpoint)) { | |
1da177e4 LT |
702 | /* we found a bulk in endpoint */ |
703 | dbg("found bulk in on endpoint %d", i); | |
704 | bulk_in_endpoint[num_bulk_in] = endpoint; | |
705 | ++num_bulk_in; | |
706 | } | |
707 | ||
4fa1bbf5 | 708 | if (usb_endpoint_is_bulk_out(endpoint)) { |
1da177e4 LT |
709 | /* we found a bulk out endpoint */ |
710 | dbg("found bulk out on endpoint %d", i); | |
711 | bulk_out_endpoint[num_bulk_out] = endpoint; | |
712 | ++num_bulk_out; | |
713 | } | |
4fa1bbf5 LFC |
714 | |
715 | if (usb_endpoint_is_int_in(endpoint)) { | |
1da177e4 LT |
716 | /* we found a interrupt in endpoint */ |
717 | dbg("found interrupt in on endpoint %d", i); | |
718 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
719 | ++num_interrupt_in; | |
720 | } | |
721 | ||
4fa1bbf5 | 722 | if (usb_endpoint_is_int_out(endpoint)) { |
1da177e4 LT |
723 | /* we found an interrupt out endpoint */ |
724 | dbg("found interrupt out on endpoint %d", i); | |
725 | interrupt_out_endpoint[num_interrupt_out] = endpoint; | |
726 | ++num_interrupt_out; | |
727 | } | |
728 | } | |
729 | ||
730 | #if defined(CONFIG_USB_SERIAL_PL2303) || defined(CONFIG_USB_SERIAL_PL2303_MODULE) | |
a8d6f0a9 | 731 | /* BEGIN HORRIBLE HACK FOR PL2303 */ |
1da177e4 LT |
732 | /* this is needed due to the looney way its endpoints are set up */ |
733 | if (((le16_to_cpu(dev->descriptor.idVendor) == PL2303_VENDOR_ID) && | |
734 | (le16_to_cpu(dev->descriptor.idProduct) == PL2303_PRODUCT_ID)) || | |
735 | ((le16_to_cpu(dev->descriptor.idVendor) == ATEN_VENDOR_ID) && | |
8fd80133 JS |
736 | (le16_to_cpu(dev->descriptor.idProduct) == ATEN_PRODUCT_ID)) || |
737 | ((le16_to_cpu(dev->descriptor.idVendor) == ALCOR_VENDOR_ID) && | |
ce816cf9 AB |
738 | (le16_to_cpu(dev->descriptor.idProduct) == ALCOR_PRODUCT_ID)) || |
739 | ((le16_to_cpu(dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) && | |
740 | (le16_to_cpu(dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_EF81))) { | |
1da177e4 LT |
741 | if (interface != dev->actconfig->interface[0]) { |
742 | /* check out the endpoints of the other interface*/ | |
743 | iface_desc = dev->actconfig->interface[0]->cur_altsetting; | |
744 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
745 | endpoint = &iface_desc->endpoint[i].desc; | |
4fa1bbf5 | 746 | if (usb_endpoint_is_int_in(endpoint)) { |
1da177e4 LT |
747 | /* we found a interrupt in endpoint */ |
748 | dbg("found interrupt in for Prolific device on separate interface"); | |
749 | interrupt_in_endpoint[num_interrupt_in] = endpoint; | |
750 | ++num_interrupt_in; | |
751 | } | |
752 | } | |
753 | } | |
754 | ||
755 | /* Now make sure the PL-2303 is configured correctly. | |
756 | * If not, give up now and hope this hack will work | |
757 | * properly during a later invocation of usb_serial_probe | |
758 | */ | |
759 | if (num_bulk_in == 0 || num_bulk_out == 0) { | |
4b10f0f3 | 760 | unlock_kernel(); |
1da177e4 | 761 | dev_info(&interface->dev, "PL-2303 hack: descriptors matched but endpoints did not\n"); |
a8d6f0a9 | 762 | kfree(serial); |
1da177e4 LT |
763 | return -ENODEV; |
764 | } | |
765 | } | |
766 | /* END HORRIBLE HACK FOR PL2303 */ | |
767 | #endif | |
768 | ||
1da177e4 LT |
769 | #ifdef CONFIG_USB_SERIAL_GENERIC |
770 | if (type == &usb_serial_generic_device) { | |
771 | num_ports = num_bulk_out; | |
772 | if (num_ports == 0) { | |
4b10f0f3 | 773 | unlock_kernel(); |
a8d6f0a9 AC |
774 | dev_err(&interface->dev, |
775 | "Generic device with no bulk out, not allowed.\n"); | |
776 | kfree(serial); | |
1da177e4 LT |
777 | return -EIO; |
778 | } | |
779 | } | |
780 | #endif | |
781 | if (!num_ports) { | |
782 | /* if this device type has a calc_num_ports function, call it */ | |
783 | if (type->calc_num_ports) { | |
18fcac35 | 784 | if (!try_module_get(type->driver.owner)) { |
4b10f0f3 | 785 | unlock_kernel(); |
a8d6f0a9 AC |
786 | dev_err(&interface->dev, |
787 | "module get failed, exiting\n"); | |
788 | kfree(serial); | |
1da177e4 LT |
789 | return -EIO; |
790 | } | |
a8d6f0a9 | 791 | num_ports = type->calc_num_ports(serial); |
18fcac35 | 792 | module_put(type->driver.owner); |
1da177e4 LT |
793 | } |
794 | if (!num_ports) | |
795 | num_ports = type->num_ports; | |
796 | } | |
797 | ||
1da177e4 LT |
798 | serial->num_ports = num_ports; |
799 | serial->num_bulk_in = num_bulk_in; | |
800 | serial->num_bulk_out = num_bulk_out; | |
801 | serial->num_interrupt_in = num_interrupt_in; | |
802 | serial->num_interrupt_out = num_interrupt_out; | |
803 | ||
063a2da8 AS |
804 | /* found all that we need */ |
805 | dev_info(&interface->dev, "%s converter detected\n", | |
806 | type->description); | |
807 | ||
1da177e4 | 808 | /* create our ports, we need as many as the max endpoints */ |
a8d6f0a9 AC |
809 | /* we don't use num_ports here because some devices have more |
810 | endpoint pairs than ports */ | |
1da177e4 LT |
811 | max_endpoints = max(num_bulk_in, num_bulk_out); |
812 | max_endpoints = max(max_endpoints, num_interrupt_in); | |
813 | max_endpoints = max(max_endpoints, num_interrupt_out); | |
814 | max_endpoints = max(max_endpoints, (int)serial->num_ports); | |
815 | serial->num_port_pointers = max_endpoints; | |
4b10f0f3 ON |
816 | unlock_kernel(); |
817 | ||
a8d6f0a9 AC |
818 | dbg("%s - setting up %d port structures for this device", |
819 | __func__, max_endpoints); | |
1da177e4 | 820 | for (i = 0; i < max_endpoints; ++i) { |
80b6ca48 | 821 | port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL); |
1da177e4 LT |
822 | if (!port) |
823 | goto probe_error; | |
4a90f09b | 824 | tty_port_init(&port->port); |
1da177e4 | 825 | port->serial = serial; |
507ca9bc | 826 | spin_lock_init(&port->lock); |
1ce7dd26 | 827 | mutex_init(&port->mutex); |
c4028958 | 828 | INIT_WORK(&port->work, usb_serial_port_work); |
1da177e4 LT |
829 | serial->port[i] = port; |
830 | } | |
831 | ||
832 | /* set up the endpoint information */ | |
833 | for (i = 0; i < num_bulk_in; ++i) { | |
834 | endpoint = bulk_in_endpoint[i]; | |
835 | port = serial->port[i]; | |
a8d6f0a9 | 836 | port->read_urb = usb_alloc_urb(0, GFP_KERNEL); |
1da177e4 LT |
837 | if (!port->read_urb) { |
838 | dev_err(&interface->dev, "No free urbs available\n"); | |
839 | goto probe_error; | |
840 | } | |
841 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
842 | port->bulk_in_size = buffer_size; | |
843 | port->bulk_in_endpointAddress = endpoint->bEndpointAddress; | |
a8d6f0a9 | 844 | port->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL); |
1da177e4 | 845 | if (!port->bulk_in_buffer) { |
a8d6f0a9 AC |
846 | dev_err(&interface->dev, |
847 | "Couldn't allocate bulk_in_buffer\n"); | |
1da177e4 LT |
848 | goto probe_error; |
849 | } | |
a8d6f0a9 AC |
850 | usb_fill_bulk_urb(port->read_urb, dev, |
851 | usb_rcvbulkpipe(dev, | |
852 | endpoint->bEndpointAddress), | |
853 | port->bulk_in_buffer, buffer_size, | |
854 | serial->type->read_bulk_callback, port); | |
1da177e4 LT |
855 | } |
856 | ||
857 | for (i = 0; i < num_bulk_out; ++i) { | |
858 | endpoint = bulk_out_endpoint[i]; | |
859 | port = serial->port[i]; | |
860 | port->write_urb = usb_alloc_urb(0, GFP_KERNEL); | |
861 | if (!port->write_urb) { | |
862 | dev_err(&interface->dev, "No free urbs available\n"); | |
863 | goto probe_error; | |
864 | } | |
865 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
866 | port->bulk_out_size = buffer_size; | |
867 | port->bulk_out_endpointAddress = endpoint->bEndpointAddress; | |
a8d6f0a9 | 868 | port->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL); |
1da177e4 | 869 | if (!port->bulk_out_buffer) { |
a8d6f0a9 AC |
870 | dev_err(&interface->dev, |
871 | "Couldn't allocate bulk_out_buffer\n"); | |
1da177e4 LT |
872 | goto probe_error; |
873 | } | |
a8d6f0a9 AC |
874 | usb_fill_bulk_urb(port->write_urb, dev, |
875 | usb_sndbulkpipe(dev, | |
876 | endpoint->bEndpointAddress), | |
877 | port->bulk_out_buffer, buffer_size, | |
878 | serial->type->write_bulk_callback, port); | |
1da177e4 LT |
879 | } |
880 | ||
881 | if (serial->type->read_int_callback) { | |
882 | for (i = 0; i < num_interrupt_in; ++i) { | |
883 | endpoint = interrupt_in_endpoint[i]; | |
884 | port = serial->port[i]; | |
885 | port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
886 | if (!port->interrupt_in_urb) { | |
a8d6f0a9 AC |
887 | dev_err(&interface->dev, |
888 | "No free urbs available\n"); | |
1da177e4 LT |
889 | goto probe_error; |
890 | } | |
891 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
a8d6f0a9 AC |
892 | port->interrupt_in_endpointAddress = |
893 | endpoint->bEndpointAddress; | |
894 | port->interrupt_in_buffer = kmalloc(buffer_size, | |
895 | GFP_KERNEL); | |
1da177e4 | 896 | if (!port->interrupt_in_buffer) { |
a8d6f0a9 AC |
897 | dev_err(&interface->dev, |
898 | "Couldn't allocate interrupt_in_buffer\n"); | |
1da177e4 LT |
899 | goto probe_error; |
900 | } | |
a8d6f0a9 AC |
901 | usb_fill_int_urb(port->interrupt_in_urb, dev, |
902 | usb_rcvintpipe(dev, | |
903 | endpoint->bEndpointAddress), | |
904 | port->interrupt_in_buffer, buffer_size, | |
905 | serial->type->read_int_callback, port, | |
906 | endpoint->bInterval); | |
1da177e4 LT |
907 | } |
908 | } else if (num_interrupt_in) { | |
909 | dbg("the device claims to support interrupt in transfers, but read_int_callback is not defined"); | |
910 | } | |
a8d6f0a9 | 911 | |
1da177e4 LT |
912 | if (serial->type->write_int_callback) { |
913 | for (i = 0; i < num_interrupt_out; ++i) { | |
914 | endpoint = interrupt_out_endpoint[i]; | |
915 | port = serial->port[i]; | |
916 | port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
917 | if (!port->interrupt_out_urb) { | |
a8d6f0a9 AC |
918 | dev_err(&interface->dev, |
919 | "No free urbs available\n"); | |
1da177e4 LT |
920 | goto probe_error; |
921 | } | |
922 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); | |
923 | port->interrupt_out_size = buffer_size; | |
a8d6f0a9 AC |
924 | port->interrupt_out_endpointAddress = |
925 | endpoint->bEndpointAddress; | |
926 | port->interrupt_out_buffer = kmalloc(buffer_size, | |
927 | GFP_KERNEL); | |
1da177e4 | 928 | if (!port->interrupt_out_buffer) { |
a8d6f0a9 AC |
929 | dev_err(&interface->dev, |
930 | "Couldn't allocate interrupt_out_buffer\n"); | |
1da177e4 LT |
931 | goto probe_error; |
932 | } | |
a8d6f0a9 AC |
933 | usb_fill_int_urb(port->interrupt_out_urb, dev, |
934 | usb_sndintpipe(dev, | |
935 | endpoint->bEndpointAddress), | |
936 | port->interrupt_out_buffer, buffer_size, | |
937 | serial->type->write_int_callback, port, | |
938 | endpoint->bInterval); | |
1da177e4 LT |
939 | } |
940 | } else if (num_interrupt_out) { | |
941 | dbg("the device claims to support interrupt out transfers, but write_int_callback is not defined"); | |
942 | } | |
a8d6f0a9 | 943 | |
1da177e4 LT |
944 | /* if this device type has an attach function, call it */ |
945 | if (type->attach) { | |
18fcac35 | 946 | if (!try_module_get(type->driver.owner)) { |
a8d6f0a9 AC |
947 | dev_err(&interface->dev, |
948 | "module get failed, exiting\n"); | |
1da177e4 LT |
949 | goto probe_error; |
950 | } | |
a8d6f0a9 | 951 | retval = type->attach(serial); |
18fcac35 | 952 | module_put(type->driver.owner); |
1da177e4 LT |
953 | if (retval < 0) |
954 | goto probe_error; | |
955 | if (retval > 0) { | |
a8d6f0a9 AC |
956 | /* quietly accept this device, but don't bind to a |
957 | serial port as it's about to disappear */ | |
1da177e4 LT |
958 | goto exit; |
959 | } | |
960 | } | |
961 | ||
a8d6f0a9 | 962 | if (get_free_serial(serial, num_ports, &minor) == NULL) { |
34ef50e5 ON |
963 | dev_err(&interface->dev, "No more free serial devices\n"); |
964 | goto probe_error; | |
965 | } | |
c744f99e | 966 | serial->minor = minor; |
34ef50e5 | 967 | |
1da177e4 LT |
968 | /* register all of the individual ports with the driver core */ |
969 | for (i = 0; i < num_ports; ++i) { | |
970 | port = serial->port[i]; | |
971 | port->dev.parent = &interface->dev; | |
972 | port->dev.driver = NULL; | |
973 | port->dev.bus = &usb_serial_bus_type; | |
974 | port->dev.release = &port_release; | |
975 | ||
0031a06e | 976 | dev_set_name(&port->dev, "ttyUSB%d", port->number); |
7071a3ce | 977 | dbg ("%s - registering %s", __func__, dev_name(&port->dev)); |
13f4db9e GKH |
978 | retval = device_register(&port->dev); |
979 | if (retval) | |
980 | dev_err(&port->dev, "Error registering port device, " | |
981 | "continuing\n"); | |
1da177e4 LT |
982 | } |
983 | ||
a8d6f0a9 | 984 | usb_serial_console_init(debug, minor); |
1da177e4 LT |
985 | |
986 | exit: | |
987 | /* success */ | |
a8d6f0a9 | 988 | usb_set_intfdata(interface, serial); |
1da177e4 LT |
989 | return 0; |
990 | ||
991 | probe_error: | |
992 | for (i = 0; i < num_bulk_in; ++i) { | |
993 | port = serial->port[i]; | |
994 | if (!port) | |
995 | continue; | |
95d43166 | 996 | usb_free_urb(port->read_urb); |
1da177e4 LT |
997 | kfree(port->bulk_in_buffer); |
998 | } | |
999 | for (i = 0; i < num_bulk_out; ++i) { | |
1000 | port = serial->port[i]; | |
1001 | if (!port) | |
1002 | continue; | |
95d43166 | 1003 | usb_free_urb(port->write_urb); |
1da177e4 LT |
1004 | kfree(port->bulk_out_buffer); |
1005 | } | |
1006 | for (i = 0; i < num_interrupt_in; ++i) { | |
1007 | port = serial->port[i]; | |
1008 | if (!port) | |
1009 | continue; | |
95d43166 | 1010 | usb_free_urb(port->interrupt_in_urb); |
1da177e4 LT |
1011 | kfree(port->interrupt_in_buffer); |
1012 | } | |
1013 | for (i = 0; i < num_interrupt_out; ++i) { | |
1014 | port = serial->port[i]; | |
1015 | if (!port) | |
1016 | continue; | |
95d43166 | 1017 | usb_free_urb(port->interrupt_out_urb); |
1da177e4 LT |
1018 | kfree(port->interrupt_out_buffer); |
1019 | } | |
1020 | ||
1da177e4 LT |
1021 | /* free up any memory that we allocated */ |
1022 | for (i = 0; i < serial->num_port_pointers; ++i) | |
1023 | kfree(serial->port[i]); | |
a8d6f0a9 | 1024 | kfree(serial); |
1da177e4 LT |
1025 | return -EIO; |
1026 | } | |
a8d6f0a9 | 1027 | EXPORT_SYMBOL_GPL(usb_serial_probe); |
1da177e4 LT |
1028 | |
1029 | void usb_serial_disconnect(struct usb_interface *interface) | |
1030 | { | |
1031 | int i; | |
a8d6f0a9 | 1032 | struct usb_serial *serial = usb_get_intfdata(interface); |
1da177e4 LT |
1033 | struct device *dev = &interface->dev; |
1034 | struct usb_serial_port *port; | |
1035 | ||
73e487fd | 1036 | usb_serial_console_disconnect(serial); |
a8d6f0a9 | 1037 | dbg("%s", __func__); |
1da177e4 | 1038 | |
a1cd7e99 | 1039 | mutex_lock(&serial->disc_mutex); |
a8d6f0a9 | 1040 | usb_set_intfdata(interface, NULL); |
a1cd7e99 ON |
1041 | /* must set a flag, to signal subdrivers */ |
1042 | serial->disconnected = 1; | |
1043 | for (i = 0; i < serial->num_ports; ++i) { | |
1044 | port = serial->port[i]; | |
1045 | if (port) { | |
4a90f09b AC |
1046 | struct tty_struct *tty = tty_port_tty_get(&port->port); |
1047 | if (tty) { | |
1048 | tty_hangup(tty); | |
1049 | tty_kref_put(tty); | |
1050 | } | |
a1cd7e99 | 1051 | kill_traffic(port); |
1da177e4 | 1052 | } |
1da177e4 | 1053 | } |
a1cd7e99 ON |
1054 | /* let the last holder of this object |
1055 | * cause it to be cleaned up */ | |
1056 | mutex_unlock(&serial->disc_mutex); | |
1057 | usb_serial_put(serial); | |
1da177e4 LT |
1058 | dev_info(dev, "device disconnected\n"); |
1059 | } | |
a8d6f0a9 | 1060 | EXPORT_SYMBOL_GPL(usb_serial_disconnect); |
1da177e4 | 1061 | |
ec22559e ON |
1062 | int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) |
1063 | { | |
1064 | struct usb_serial *serial = usb_get_intfdata(intf); | |
1065 | struct usb_serial_port *port; | |
1066 | int i, r = 0; | |
1067 | ||
e31c1880 ON |
1068 | for (i = 0; i < serial->num_ports; ++i) { |
1069 | port = serial->port[i]; | |
1070 | if (port) | |
1071 | kill_traffic(port); | |
ec22559e ON |
1072 | } |
1073 | ||
1074 | if (serial->type->suspend) | |
e31c1880 | 1075 | r = serial->type->suspend(serial, message); |
ec22559e ON |
1076 | |
1077 | return r; | |
1078 | } | |
1079 | EXPORT_SYMBOL(usb_serial_suspend); | |
1080 | ||
1081 | int usb_serial_resume(struct usb_interface *intf) | |
1082 | { | |
1083 | struct usb_serial *serial = usb_get_intfdata(intf); | |
1084 | ||
8abaee23 SS |
1085 | if (serial->type->resume) |
1086 | return serial->type->resume(serial); | |
1087 | return 0; | |
ec22559e ON |
1088 | } |
1089 | EXPORT_SYMBOL(usb_serial_resume); | |
1090 | ||
b68e31d0 | 1091 | static const struct tty_operations serial_ops = { |
1da177e4 LT |
1092 | .open = serial_open, |
1093 | .close = serial_close, | |
1094 | .write = serial_write, | |
1095 | .write_room = serial_write_room, | |
1096 | .ioctl = serial_ioctl, | |
1097 | .set_termios = serial_set_termios, | |
1098 | .throttle = serial_throttle, | |
1099 | .unthrottle = serial_unthrottle, | |
1100 | .break_ctl = serial_break, | |
1101 | .chars_in_buffer = serial_chars_in_buffer, | |
1102 | .read_proc = serial_read_proc, | |
1103 | .tiocmget = serial_tiocmget, | |
1104 | .tiocmset = serial_tiocmset, | |
1105 | }; | |
1106 | ||
1107 | struct tty_driver *usb_serial_tty_driver; | |
1108 | ||
1109 | static int __init usb_serial_init(void) | |
1110 | { | |
1111 | int i; | |
1112 | int result; | |
1113 | ||
1114 | usb_serial_tty_driver = alloc_tty_driver(SERIAL_TTY_MINORS); | |
1115 | if (!usb_serial_tty_driver) | |
1116 | return -ENOMEM; | |
1117 | ||
1118 | /* Initialize our global data */ | |
a8d6f0a9 | 1119 | for (i = 0; i < SERIAL_TTY_MINORS; ++i) |
1da177e4 | 1120 | serial_table[i] = NULL; |
1da177e4 LT |
1121 | |
1122 | result = bus_register(&usb_serial_bus_type); | |
1123 | if (result) { | |
194343d9 GKH |
1124 | printk(KERN_ERR "usb-serial: %s - registering bus driver " |
1125 | "failed\n", __func__); | |
1da177e4 LT |
1126 | goto exit_bus; |
1127 | } | |
1128 | ||
1da177e4 LT |
1129 | usb_serial_tty_driver->owner = THIS_MODULE; |
1130 | usb_serial_tty_driver->driver_name = "usbserial"; | |
1da177e4 LT |
1131 | usb_serial_tty_driver->name = "ttyUSB"; |
1132 | usb_serial_tty_driver->major = SERIAL_TTY_MAJOR; | |
1133 | usb_serial_tty_driver->minor_start = 0; | |
1134 | usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1135 | usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
a8d6f0a9 AC |
1136 | usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | |
1137 | TTY_DRIVER_DYNAMIC_DEV; | |
1da177e4 | 1138 | usb_serial_tty_driver->init_termios = tty_std_termios; |
a8d6f0a9 AC |
1139 | usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD |
1140 | | HUPCL | CLOCAL; | |
a5b6f60c AC |
1141 | usb_serial_tty_driver->init_termios.c_ispeed = 9600; |
1142 | usb_serial_tty_driver->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
1143 | tty_set_operations(usb_serial_tty_driver, &serial_ops); |
1144 | result = tty_register_driver(usb_serial_tty_driver); | |
1145 | if (result) { | |
194343d9 GKH |
1146 | printk(KERN_ERR "usb-serial: %s - tty_register_driver failed\n", |
1147 | __func__); | |
1da177e4 LT |
1148 | goto exit_reg_driver; |
1149 | } | |
1150 | ||
1151 | /* register the USB driver */ | |
1152 | result = usb_register(&usb_serial_driver); | |
1153 | if (result < 0) { | |
194343d9 GKH |
1154 | printk(KERN_ERR "usb-serial: %s - usb_register failed\n", |
1155 | __func__); | |
1da177e4 LT |
1156 | goto exit_tty; |
1157 | } | |
1158 | ||
06299db3 GKH |
1159 | /* register the generic driver, if we should */ |
1160 | result = usb_serial_generic_register(debug); | |
1161 | if (result < 0) { | |
194343d9 GKH |
1162 | printk(KERN_ERR "usb-serial: %s - registering generic " |
1163 | "driver failed\n", __func__); | |
06299db3 GKH |
1164 | goto exit_generic; |
1165 | } | |
1166 | ||
c197a8db | 1167 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
1da177e4 LT |
1168 | |
1169 | return result; | |
1170 | ||
06299db3 GKH |
1171 | exit_generic: |
1172 | usb_deregister(&usb_serial_driver); | |
1173 | ||
1da177e4 LT |
1174 | exit_tty: |
1175 | tty_unregister_driver(usb_serial_tty_driver); | |
1176 | ||
1177 | exit_reg_driver: | |
1da177e4 LT |
1178 | bus_unregister(&usb_serial_bus_type); |
1179 | ||
1180 | exit_bus: | |
194343d9 GKH |
1181 | printk(KERN_ERR "usb-serial: %s - returning with error %d\n", |
1182 | __func__, result); | |
1da177e4 LT |
1183 | put_tty_driver(usb_serial_tty_driver); |
1184 | return result; | |
1185 | } | |
1186 | ||
1187 | ||
1188 | static void __exit usb_serial_exit(void) | |
1189 | { | |
1190 | usb_serial_console_exit(); | |
1191 | ||
1192 | usb_serial_generic_deregister(); | |
1193 | ||
1194 | usb_deregister(&usb_serial_driver); | |
1195 | tty_unregister_driver(usb_serial_tty_driver); | |
1196 | put_tty_driver(usb_serial_tty_driver); | |
1197 | bus_unregister(&usb_serial_bus_type); | |
1198 | } | |
1199 | ||
1200 | ||
1201 | module_init(usb_serial_init); | |
1202 | module_exit(usb_serial_exit); | |
1203 | ||
1204 | #define set_to_generic_if_null(type, function) \ | |
1205 | do { \ | |
1206 | if (!type->function) { \ | |
1207 | type->function = usb_serial_generic_##function; \ | |
1208 | dbg("Had to override the " #function \ | |
a8d6f0a9 | 1209 | " usb serial operation with the generic one.");\ |
1da177e4 LT |
1210 | } \ |
1211 | } while (0) | |
1212 | ||
ea65370d | 1213 | static void fixup_generic(struct usb_serial_driver *device) |
1da177e4 LT |
1214 | { |
1215 | set_to_generic_if_null(device, open); | |
1216 | set_to_generic_if_null(device, write); | |
1217 | set_to_generic_if_null(device, close); | |
1218 | set_to_generic_if_null(device, write_room); | |
1219 | set_to_generic_if_null(device, chars_in_buffer); | |
1220 | set_to_generic_if_null(device, read_bulk_callback); | |
1221 | set_to_generic_if_null(device, write_bulk_callback); | |
1222 | set_to_generic_if_null(device, shutdown); | |
f0fbd5b9 | 1223 | set_to_generic_if_null(device, resume); |
1da177e4 LT |
1224 | } |
1225 | ||
a8d6f0a9 | 1226 | int usb_serial_register(struct usb_serial_driver *driver) |
1da177e4 | 1227 | { |
a8d6f0a9 | 1228 | /* must be called with BKL held */ |
1da177e4 LT |
1229 | int retval; |
1230 | ||
ea65370d | 1231 | fixup_generic(driver); |
1da177e4 | 1232 | |
269bda1c GKH |
1233 | if (!driver->description) |
1234 | driver->description = driver->driver.name; | |
1235 | ||
1da177e4 | 1236 | /* Add this device to our list of devices */ |
ea65370d | 1237 | list_add(&driver->driver_list, &usb_serial_driver_list); |
1da177e4 | 1238 | |
ea65370d | 1239 | retval = usb_serial_bus_register(driver); |
1da177e4 | 1240 | if (retval) { |
194343d9 GKH |
1241 | printk(KERN_ERR "usb-serial: problem %d when registering " |
1242 | "driver %s\n", retval, driver->description); | |
ea65370d | 1243 | list_del(&driver->driver_list); |
a8d6f0a9 | 1244 | } else |
c197a8db | 1245 | printk(KERN_INFO "USB Serial support registered for %s\n", |
a8d6f0a9 | 1246 | driver->description); |
1da177e4 LT |
1247 | |
1248 | return retval; | |
1249 | } | |
a8d6f0a9 | 1250 | EXPORT_SYMBOL_GPL(usb_serial_register); |
1da177e4 LT |
1251 | |
1252 | ||
a8d6f0a9 | 1253 | void usb_serial_deregister(struct usb_serial_driver *device) |
1da177e4 | 1254 | { |
a8d6f0a9 | 1255 | /* must be called with BKL held */ |
c197a8db GKH |
1256 | printk(KERN_INFO "USB Serial deregistering driver %s\n", |
1257 | device->description); | |
1da177e4 LT |
1258 | list_del(&device->driver_list); |
1259 | usb_serial_bus_deregister(device); | |
1260 | } | |
1da177e4 | 1261 | EXPORT_SYMBOL_GPL(usb_serial_deregister); |
1da177e4 LT |
1262 | |
1263 | /* Module information */ | |
a8d6f0a9 AC |
1264 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1265 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1266 | MODULE_LICENSE("GPL"); |
1267 | ||
1268 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
1269 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |