Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * USB Serial Converter Generic functions | |
3 | * | |
d83b4053 | 4 | * Copyright (C) 2010 - 2011 Johan Hovold (jhovold@gmail.com) |
1da177e4 LT |
5 | * Copyright (C) 1999 - 2002 Greg Kroah-Hartman (greg@kroah.com) |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License version | |
9 | * 2 as published by the Free Software Foundation. | |
10 | * | |
11 | */ | |
12 | ||
1da177e4 LT |
13 | #include <linux/kernel.h> |
14 | #include <linux/errno.h> | |
15 | #include <linux/slab.h> | |
7f0ae3a8 | 16 | #include <linux/sysrq.h> |
1da177e4 LT |
17 | #include <linux/tty.h> |
18 | #include <linux/tty_flip.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/moduleparam.h> | |
21 | #include <linux/usb.h> | |
a969888c | 22 | #include <linux/usb/serial.h> |
ae64387a | 23 | #include <linux/uaccess.h> |
8e8dce06 | 24 | #include <linux/kfifo.h> |
1f87158e | 25 | #include <linux/serial.h> |
d9b1b787 | 26 | |
1da177e4 | 27 | #ifdef CONFIG_USB_SERIAL_GENERIC |
b46d60fc | 28 | |
1da177e4 LT |
29 | static __u16 vendor = 0x05f9; |
30 | static __u16 product = 0xffff; | |
31 | ||
32 | module_param(vendor, ushort, 0); | |
33 | MODULE_PARM_DESC(vendor, "User specified USB idVendor"); | |
34 | ||
35 | module_param(product, ushort, 0); | |
36 | MODULE_PARM_DESC(product, "User specified USB idProduct"); | |
37 | ||
38 | static struct usb_device_id generic_device_ids[2]; /* Initially all zeroes. */ | |
39 | ||
40 | /* All of the device info needed for the Generic Serial Converter */ | |
ea65370d | 41 | struct usb_serial_driver usb_serial_generic_device = { |
18fcac35 GKH |
42 | .driver = { |
43 | .owner = THIS_MODULE, | |
269bda1c | 44 | .name = "generic", |
18fcac35 | 45 | }, |
1da177e4 | 46 | .id_table = generic_device_ids, |
1da177e4 | 47 | .num_ports = 1, |
f9c99bb8 AS |
48 | .disconnect = usb_serial_generic_disconnect, |
49 | .release = usb_serial_generic_release, | |
253ca923 JR |
50 | .throttle = usb_serial_generic_throttle, |
51 | .unthrottle = usb_serial_generic_unthrottle, | |
ec22559e | 52 | .resume = usb_serial_generic_resume, |
1da177e4 LT |
53 | }; |
54 | ||
765e0ba6 AS |
55 | static struct usb_serial_driver * const serial_drivers[] = { |
56 | &usb_serial_generic_device, NULL | |
57 | }; | |
58 | ||
1da177e4 LT |
59 | #endif |
60 | ||
3033bc8d | 61 | int usb_serial_generic_register(void) |
1da177e4 LT |
62 | { |
63 | int retval = 0; | |
64 | ||
1da177e4 LT |
65 | #ifdef CONFIG_USB_SERIAL_GENERIC |
66 | generic_device_ids[0].idVendor = vendor; | |
67 | generic_device_ids[0].idProduct = product; | |
ae64387a AC |
68 | generic_device_ids[0].match_flags = |
69 | USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_PRODUCT; | |
1da177e4 LT |
70 | |
71 | /* register our generic driver with ourselves */ | |
0b84704a AS |
72 | retval = usb_serial_register_drivers(serial_drivers, |
73 | "usbserial_generic", generic_device_ids); | |
1da177e4 LT |
74 | #endif |
75 | return retval; | |
76 | } | |
77 | ||
ae64387a | 78 | void usb_serial_generic_deregister(void) |
1da177e4 LT |
79 | { |
80 | #ifdef CONFIG_USB_SERIAL_GENERIC | |
81 | /* remove our generic driver */ | |
68e24113 | 82 | usb_serial_deregister_drivers(serial_drivers); |
1da177e4 LT |
83 | #endif |
84 | } | |
85 | ||
a509a7e4 | 86 | int usb_serial_generic_open(struct tty_struct *tty, struct usb_serial_port *port) |
1da177e4 | 87 | { |
1da177e4 | 88 | int result = 0; |
253ca923 | 89 | unsigned long flags; |
1da177e4 | 90 | |
253ca923 JR |
91 | /* clear the throttle flags */ |
92 | spin_lock_irqsave(&port->lock, flags); | |
93 | port->throttled = 0; | |
94 | port->throttle_req = 0; | |
95 | spin_unlock_irqrestore(&port->lock, flags); | |
96 | ||
97 | /* if we have a bulk endpoint, start reading from it */ | |
41bd72f9 | 98 | if (port->bulk_in_size) |
d83b4053 | 99 | result = usb_serial_generic_submit_read_urbs(port, GFP_KERNEL); |
1da177e4 LT |
100 | |
101 | return result; | |
102 | } | |
815ddc99 | 103 | EXPORT_SYMBOL_GPL(usb_serial_generic_open); |
1da177e4 | 104 | |
95da310e | 105 | static void generic_cleanup(struct usb_serial_port *port) |
1da177e4 | 106 | { |
ec3ee508 | 107 | unsigned long flags; |
27c7acf2 | 108 | int i; |
1da177e4 | 109 | |
19c61853 JH |
110 | if (port->bulk_out_size) { |
111 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) | |
112 | usb_kill_urb(port->write_urbs[i]); | |
113 | ||
114 | spin_lock_irqsave(&port->lock, flags); | |
115 | kfifo_reset_out(&port->write_fifo); | |
116 | spin_unlock_irqrestore(&port->lock, flags); | |
117 | } | |
118 | if (port->bulk_in_size) { | |
119 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) | |
120 | usb_kill_urb(port->read_urbs[i]); | |
1da177e4 LT |
121 | } |
122 | } | |
123 | ||
335f8514 | 124 | void usb_serial_generic_close(struct usb_serial_port *port) |
1da177e4 | 125 | { |
ae64387a | 126 | generic_cleanup(port); |
1da177e4 | 127 | } |
f26788da | 128 | EXPORT_SYMBOL_GPL(usb_serial_generic_close); |
1da177e4 | 129 | |
eaa3bcb0 | 130 | int usb_serial_generic_prepare_write_buffer(struct usb_serial_port *port, |
c23e5fc1 | 131 | void *dest, size_t size) |
eaa3bcb0 | 132 | { |
c23e5fc1 | 133 | return kfifo_out_locked(&port->write_fifo, dest, size, &port->lock); |
715b1dc0 JW |
134 | } |
135 | ||
8e8dce06 DV |
136 | /** |
137 | * usb_serial_generic_write_start - kick off an URB write | |
138 | * @port: Pointer to the &struct usb_serial_port data | |
139 | * | |
27c7acf2 | 140 | * Returns zero on success, or a negative errno value |
8e8dce06 DV |
141 | */ |
142 | static int usb_serial_generic_write_start(struct usb_serial_port *port) | |
143 | { | |
27c7acf2 JH |
144 | struct urb *urb; |
145 | int count, result; | |
8e8dce06 | 146 | unsigned long flags; |
27c7acf2 | 147 | int i; |
8e8dce06 | 148 | |
27c7acf2 JH |
149 | if (test_and_set_bit_lock(USB_SERIAL_WRITE_BUSY, &port->flags)) |
150 | return 0; | |
151 | retry: | |
8e8dce06 | 152 | spin_lock_irqsave(&port->lock, flags); |
27c7acf2 JH |
153 | if (!port->write_urbs_free || !kfifo_len(&port->write_fifo)) { |
154 | clear_bit_unlock(USB_SERIAL_WRITE_BUSY, &port->flags); | |
50a5f70c JH |
155 | spin_unlock_irqrestore(&port->lock, flags); |
156 | return 0; | |
8e8dce06 | 157 | } |
27c7acf2 JH |
158 | i = (int)find_first_bit(&port->write_urbs_free, |
159 | ARRAY_SIZE(port->write_urbs)); | |
8e8dce06 DV |
160 | spin_unlock_irqrestore(&port->lock, flags); |
161 | ||
27c7acf2 | 162 | urb = port->write_urbs[i]; |
eaa3bcb0 | 163 | count = port->serial->type->prepare_write_buffer(port, |
c23e5fc1 JH |
164 | urb->transfer_buffer, |
165 | port->bulk_out_size); | |
27c7acf2 | 166 | urb->transfer_buffer_length = count; |
59d33f2f | 167 | usb_serial_debug_data(&port->dev, __func__, count, urb->transfer_buffer); |
b58af406 JH |
168 | spin_lock_irqsave(&port->lock, flags); |
169 | port->tx_bytes += count; | |
170 | spin_unlock_irqrestore(&port->lock, flags); | |
171 | ||
172 | clear_bit(i, &port->write_urbs_free); | |
27c7acf2 | 173 | result = usb_submit_urb(urb, GFP_ATOMIC); |
8e8dce06 | 174 | if (result) { |
f1475a00 | 175 | dev_err_console(port, "%s - error submitting urb: %d\n", |
8e8dce06 | 176 | __func__, result); |
b58af406 JH |
177 | set_bit(i, &port->write_urbs_free); |
178 | spin_lock_irqsave(&port->lock, flags); | |
179 | port->tx_bytes -= count; | |
180 | spin_unlock_irqrestore(&port->lock, flags); | |
181 | ||
27c7acf2 | 182 | clear_bit_unlock(USB_SERIAL_WRITE_BUSY, &port->flags); |
30af7fb5 JH |
183 | return result; |
184 | } | |
30af7fb5 | 185 | |
27c7acf2 JH |
186 | /* Try sending off another urb, unless in irq context (in which case |
187 | * there will be no free urb). */ | |
188 | if (!in_irq()) | |
189 | goto retry; | |
190 | ||
191 | clear_bit_unlock(USB_SERIAL_WRITE_BUSY, &port->flags); | |
192 | ||
193 | return 0; | |
8e8dce06 DV |
194 | } |
195 | ||
196 | /** | |
197 | * usb_serial_generic_write - generic write function for serial USB devices | |
198 | * @tty: Pointer to &struct tty_struct for the device | |
199 | * @port: Pointer to the &usb_serial_port structure for the device | |
200 | * @buf: Pointer to the data to write | |
201 | * @count: Number of bytes to write | |
202 | * | |
203 | * Returns the number of characters actually written, which may be anything | |
204 | * from zero to @count. If an error occurs, it returns the negative errno | |
205 | * value. | |
206 | */ | |
95da310e AC |
207 | int usb_serial_generic_write(struct tty_struct *tty, |
208 | struct usb_serial_port *port, const unsigned char *buf, int count) | |
1da177e4 | 209 | { |
1da177e4 | 210 | int result; |
1da177e4 | 211 | |
eb8878a8 JH |
212 | /* only do something if we have a bulk out endpoint */ |
213 | if (!port->bulk_out_size) | |
214 | return -ENODEV; | |
215 | ||
1a1405e2 | 216 | if (!count) |
ae64387a | 217 | return 0; |
1da177e4 | 218 | |
119eecc8 | 219 | count = kfifo_in_locked(&port->write_fifo, buf, count, &port->lock); |
8e8dce06 | 220 | result = usb_serial_generic_write_start(port); |
c23e5fc1 JH |
221 | if (result) |
222 | return result; | |
1da177e4 | 223 | |
c23e5fc1 | 224 | return count; |
1da177e4 | 225 | } |
98fcb5f7 | 226 | EXPORT_SYMBOL_GPL(usb_serial_generic_write); |
1da177e4 | 227 | |
ae64387a | 228 | int usb_serial_generic_write_room(struct tty_struct *tty) |
1da177e4 | 229 | { |
95da310e | 230 | struct usb_serial_port *port = tty->driver_data; |
715b1dc0 | 231 | unsigned long flags; |
25d514ca | 232 | int room; |
1da177e4 | 233 | |
eb8878a8 JH |
234 | if (!port->bulk_out_size) |
235 | return 0; | |
236 | ||
715b1dc0 | 237 | spin_lock_irqsave(&port->lock, flags); |
c23e5fc1 | 238 | room = kfifo_avail(&port->write_fifo); |
715b1dc0 | 239 | spin_unlock_irqrestore(&port->lock, flags); |
1da177e4 | 240 | |
689c2781 | 241 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); |
a5b6f60c | 242 | return room; |
1da177e4 LT |
243 | } |
244 | ||
95da310e | 245 | int usb_serial_generic_chars_in_buffer(struct tty_struct *tty) |
1da177e4 | 246 | { |
95da310e | 247 | struct usb_serial_port *port = tty->driver_data; |
715b1dc0 | 248 | unsigned long flags; |
eb8878a8 | 249 | int chars; |
1da177e4 | 250 | |
eb8878a8 JH |
251 | if (!port->bulk_out_size) |
252 | return 0; | |
253 | ||
25719e6b | 254 | spin_lock_irqsave(&port->lock, flags); |
c23e5fc1 | 255 | chars = kfifo_len(&port->write_fifo) + port->tx_bytes; |
25719e6b | 256 | spin_unlock_irqrestore(&port->lock, flags); |
1da177e4 | 257 | |
689c2781 | 258 | dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars); |
95da310e | 259 | return chars; |
1da177e4 | 260 | } |
428d9988 | 261 | EXPORT_SYMBOL_GPL(usb_serial_generic_chars_in_buffer); |
1da177e4 | 262 | |
d83b4053 JH |
263 | static int usb_serial_generic_submit_read_urb(struct usb_serial_port *port, |
264 | int index, gfp_t mem_flags) | |
265 | { | |
266 | int res; | |
267 | ||
268 | if (!test_and_clear_bit(index, &port->read_urbs_free)) | |
269 | return 0; | |
270 | ||
49bd196d | 271 | dev_dbg(&port->dev, "%s - urb %d\n", __func__, index); |
d83b4053 JH |
272 | |
273 | res = usb_submit_urb(port->read_urbs[index], mem_flags); | |
274 | if (res) { | |
275 | if (res != -EPERM) { | |
276 | dev_err(&port->dev, | |
277 | "%s - usb_submit_urb failed: %d\n", | |
278 | __func__, res); | |
279 | } | |
280 | set_bit(index, &port->read_urbs_free); | |
281 | return res; | |
282 | } | |
283 | ||
284 | return 0; | |
285 | } | |
286 | ||
287 | int usb_serial_generic_submit_read_urbs(struct usb_serial_port *port, | |
41bd72f9 | 288 | gfp_t mem_flags) |
1da177e4 | 289 | { |
d83b4053 JH |
290 | int res; |
291 | int i; | |
1da177e4 | 292 | |
d83b4053 JH |
293 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) { |
294 | res = usb_serial_generic_submit_read_urb(port, i, mem_flags); | |
295 | if (res) | |
296 | goto err; | |
0ae14743 | 297 | } |
d83b4053 JH |
298 | |
299 | return 0; | |
300 | err: | |
301 | for (; i >= 0; --i) | |
302 | usb_kill_urb(port->read_urbs[i]); | |
303 | ||
304 | return res; | |
1da177e4 | 305 | } |
d83b4053 | 306 | EXPORT_SYMBOL_GPL(usb_serial_generic_submit_read_urbs); |
253ca923 | 307 | |
23154320 | 308 | void usb_serial_generic_process_read_urb(struct urb *urb) |
1abdeeb1 | 309 | { |
0f3d5bae | 310 | struct usb_serial_port *port = urb->context; |
98fcb5f7 JW |
311 | char *ch = (char *)urb->transfer_buffer; |
312 | int i; | |
313 | ||
56a1df46 JH |
314 | if (!urb->actual_length) |
315 | return; | |
316 | ||
4cd1de0a AC |
317 | /* The per character mucking around with sysrq path it too slow for |
318 | stuff like 3G modems, so shortcircuit it in the 99.9999999% of cases | |
319 | where the USB serial is not a console anyway */ | |
bd5afa9e | 320 | if (!port->port.console || !port->sysrq) |
05c7cd39 | 321 | tty_insert_flip_string(&port->port, ch, urb->actual_length); |
4cd1de0a | 322 | else { |
4cd1de0a | 323 | for (i = 0; i < urb->actual_length; i++, ch++) { |
6ee9f4b4 | 324 | if (!usb_serial_handle_sysrq_char(port, *ch)) |
92a19f9c | 325 | tty_insert_flip_char(&port->port, *ch, TTY_NORMAL); |
4cd1de0a | 326 | } |
1abdeeb1 | 327 | } |
2e124b4a | 328 | tty_flip_buffer_push(&port->port); |
1abdeeb1 | 329 | } |
23154320 | 330 | EXPORT_SYMBOL_GPL(usb_serial_generic_process_read_urb); |
1abdeeb1 | 331 | |
95da310e | 332 | void usb_serial_generic_read_bulk_callback(struct urb *urb) |
253ca923 | 333 | { |
cdc97792 | 334 | struct usb_serial_port *port = urb->context; |
253ca923 | 335 | unsigned char *data = urb->transfer_buffer; |
bfaeafcf | 336 | unsigned long flags; |
d83b4053 | 337 | int i; |
253ca923 | 338 | |
d83b4053 JH |
339 | for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) { |
340 | if (urb == port->read_urbs[i]) | |
341 | break; | |
342 | } | |
343 | set_bit(i, &port->read_urbs_free); | |
253ca923 | 344 | |
49bd196d JH |
345 | dev_dbg(&port->dev, "%s - urb %d, len %d\n", __func__, i, |
346 | urb->actual_length); | |
689c2781 | 347 | |
d83b4053 | 348 | if (urb->status) { |
689c2781 GKH |
349 | dev_dbg(&port->dev, "%s - non-zero urb status: %d\n", |
350 | __func__, urb->status); | |
253ca923 JR |
351 | return; |
352 | } | |
353 | ||
59d33f2f | 354 | usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); |
23154320 | 355 | port->serial->type->process_read_urb(urb); |
253ca923 JR |
356 | |
357 | /* Throttle the device if requested by tty */ | |
bfaeafcf | 358 | spin_lock_irqsave(&port->lock, flags); |
ae64387a AC |
359 | port->throttled = port->throttle_req; |
360 | if (!port->throttled) { | |
b507cc97 | 361 | spin_unlock_irqrestore(&port->lock, flags); |
d83b4053 | 362 | usb_serial_generic_submit_read_urb(port, i, GFP_ATOMIC); |
ae64387a | 363 | } else |
b507cc97 | 364 | spin_unlock_irqrestore(&port->lock, flags); |
253ca923 | 365 | } |
166ffccf | 366 | EXPORT_SYMBOL_GPL(usb_serial_generic_read_bulk_callback); |
1da177e4 | 367 | |
95da310e | 368 | void usb_serial_generic_write_bulk_callback(struct urb *urb) |
1da177e4 | 369 | { |
715b1dc0 | 370 | unsigned long flags; |
cdc97792 | 371 | struct usb_serial_port *port = urb->context; |
fbd27225 | 372 | int status = urb->status; |
27c7acf2 | 373 | int i; |
1da177e4 | 374 | |
c23e5fc1 JH |
375 | for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) |
376 | if (port->write_urbs[i] == urb) | |
377 | break; | |
25915302 | 378 | |
c23e5fc1 JH |
379 | spin_lock_irqsave(&port->lock, flags); |
380 | port->tx_bytes -= urb->transfer_buffer_length; | |
381 | set_bit(i, &port->write_urbs_free); | |
382 | spin_unlock_irqrestore(&port->lock, flags); | |
383 | ||
384 | if (status) { | |
689c2781 GKH |
385 | dev_dbg(&port->dev, "%s - non-zero urb status: %d\n", |
386 | __func__, status); | |
27c7acf2 | 387 | |
30af7fb5 | 388 | spin_lock_irqsave(&port->lock, flags); |
c23e5fc1 | 389 | kfifo_reset_out(&port->write_fifo); |
30af7fb5 | 390 | spin_unlock_irqrestore(&port->lock, flags); |
c23e5fc1 JH |
391 | } else { |
392 | usb_serial_generic_write_start(port); | |
1da177e4 | 393 | } |
8e8dce06 | 394 | |
cf2c7481 | 395 | usb_serial_port_softint(port); |
1da177e4 | 396 | } |
bb833986 | 397 | EXPORT_SYMBOL_GPL(usb_serial_generic_write_bulk_callback); |
1da177e4 | 398 | |
95da310e | 399 | void usb_serial_generic_throttle(struct tty_struct *tty) |
253ca923 | 400 | { |
95da310e | 401 | struct usb_serial_port *port = tty->driver_data; |
253ca923 JR |
402 | unsigned long flags; |
403 | ||
253ca923 JR |
404 | /* Set the throttle request flag. It will be picked up |
405 | * by usb_serial_generic_read_bulk_callback(). */ | |
406 | spin_lock_irqsave(&port->lock, flags); | |
407 | port->throttle_req = 1; | |
408 | spin_unlock_irqrestore(&port->lock, flags); | |
409 | } | |
f1e949ac | 410 | EXPORT_SYMBOL_GPL(usb_serial_generic_throttle); |
253ca923 | 411 | |
95da310e | 412 | void usb_serial_generic_unthrottle(struct tty_struct *tty) |
253ca923 | 413 | { |
95da310e | 414 | struct usb_serial_port *port = tty->driver_data; |
253ca923 | 415 | int was_throttled; |
253ca923 | 416 | |
253ca923 | 417 | /* Clear the throttle flags */ |
0f3d5bae | 418 | spin_lock_irq(&port->lock); |
253ca923 JR |
419 | was_throttled = port->throttled; |
420 | port->throttled = port->throttle_req = 0; | |
0f3d5bae | 421 | spin_unlock_irq(&port->lock); |
253ca923 | 422 | |
0f3d5bae | 423 | if (was_throttled) |
d83b4053 | 424 | usb_serial_generic_submit_read_urbs(port, GFP_KERNEL); |
253ca923 | 425 | } |
f1e949ac | 426 | EXPORT_SYMBOL_GPL(usb_serial_generic_unthrottle); |
253ca923 | 427 | |
7f0ae3a8 | 428 | #ifdef CONFIG_MAGIC_SYSRQ |
6ee9f4b4 | 429 | int usb_serial_handle_sysrq_char(struct usb_serial_port *port, unsigned int ch) |
98fcb5f7 | 430 | { |
bd5afa9e | 431 | if (port->sysrq && port->port.console) { |
98fcb5f7 | 432 | if (ch && time_before(jiffies, port->sysrq)) { |
f335397d | 433 | handle_sysrq(ch); |
98fcb5f7 JW |
434 | port->sysrq = 0; |
435 | return 1; | |
436 | } | |
437 | port->sysrq = 0; | |
438 | } | |
439 | return 0; | |
440 | } | |
7f0ae3a8 | 441 | #else |
6ee9f4b4 | 442 | int usb_serial_handle_sysrq_char(struct usb_serial_port *port, unsigned int ch) |
7f0ae3a8 RD |
443 | { |
444 | return 0; | |
445 | } | |
446 | #endif | |
98fcb5f7 JW |
447 | EXPORT_SYMBOL_GPL(usb_serial_handle_sysrq_char); |
448 | ||
449 | int usb_serial_handle_break(struct usb_serial_port *port) | |
450 | { | |
451 | if (!port->sysrq) { | |
452 | port->sysrq = jiffies + HZ*5; | |
453 | return 1; | |
454 | } | |
455 | port->sysrq = 0; | |
456 | return 0; | |
457 | } | |
458 | EXPORT_SYMBOL_GPL(usb_serial_handle_break); | |
459 | ||
d14fc1a7 LP |
460 | /** |
461 | * usb_serial_handle_dcd_change - handle a change of carrier detect state | |
462 | * @port: usb_serial_port structure for the open port | |
463 | * @tty: tty_struct structure for the port | |
464 | * @status: new carrier detect status, nonzero if active | |
465 | */ | |
466 | void usb_serial_handle_dcd_change(struct usb_serial_port *usb_port, | |
467 | struct tty_struct *tty, unsigned int status) | |
468 | { | |
469 | struct tty_port *port = &usb_port->port; | |
470 | ||
49bd196d | 471 | dev_dbg(&usb_port->dev, "%s - status %d\n", __func__, status); |
d14fc1a7 LP |
472 | |
473 | if (status) | |
474 | wake_up_interruptible(&port->open_wait); | |
475 | else if (tty && !C_CLOCAL(tty)) | |
476 | tty_hangup(tty); | |
477 | } | |
478 | EXPORT_SYMBOL_GPL(usb_serial_handle_dcd_change); | |
479 | ||
8e8dce06 DV |
480 | int usb_serial_generic_resume(struct usb_serial *serial) |
481 | { | |
482 | struct usb_serial_port *port; | |
483 | int i, c = 0, r; | |
484 | ||
485 | for (i = 0; i < serial->num_ports; i++) { | |
486 | port = serial->port[i]; | |
1f87158e | 487 | if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags)) |
8e8dce06 DV |
488 | continue; |
489 | ||
d83b4053 JH |
490 | if (port->bulk_in_size) { |
491 | r = usb_serial_generic_submit_read_urbs(port, | |
492 | GFP_NOIO); | |
8e8dce06 DV |
493 | if (r < 0) |
494 | c++; | |
495 | } | |
496 | ||
27c7acf2 | 497 | if (port->bulk_out_size) { |
8e8dce06 DV |
498 | r = usb_serial_generic_write_start(port); |
499 | if (r < 0) | |
500 | c++; | |
501 | } | |
502 | } | |
503 | ||
504 | return c ? -EIO : 0; | |
505 | } | |
506 | EXPORT_SYMBOL_GPL(usb_serial_generic_resume); | |
507 | ||
f9c99bb8 | 508 | void usb_serial_generic_disconnect(struct usb_serial *serial) |
1da177e4 LT |
509 | { |
510 | int i; | |
511 | ||
1da177e4 | 512 | /* stop reads and writes on all ports */ |
ae64387a | 513 | for (i = 0; i < serial->num_ports; ++i) |
1da177e4 | 514 | generic_cleanup(serial->port[i]); |
1da177e4 | 515 | } |
5c7efeb7 | 516 | EXPORT_SYMBOL_GPL(usb_serial_generic_disconnect); |
1da177e4 | 517 | |
f9c99bb8 AS |
518 | void usb_serial_generic_release(struct usb_serial *serial) |
519 | { | |
f9c99bb8 | 520 | } |