Commit | Line | Data |
---|---|---|
57262b82 GKH |
1 | /* |
2 | * Opticon USB barcode to serial driver | |
3 | * | |
309a0579 | 4 | * Copyright (C) 2011 Martin Jansen <martin.jansen@opticon.com> |
648d4e16 GKH |
5 | * Copyright (C) 2008 - 2009 Greg Kroah-Hartman <gregkh@suse.de> |
6 | * Copyright (C) 2008 - 2009 Novell Inc. | |
57262b82 GKH |
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 | */ | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/tty.h> | |
16 | #include <linux/tty_driver.h> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
57262b82 | 18 | #include <linux/tty_flip.h> |
faac64ad | 19 | #include <linux/serial.h> |
57262b82 GKH |
20 | #include <linux/module.h> |
21 | #include <linux/usb.h> | |
22 | #include <linux/usb/serial.h> | |
23 | #include <linux/uaccess.h> | |
24 | ||
309a0579 MJ |
25 | #define CONTROL_RTS 0x02 |
26 | #define RESEND_CTS_STATE 0x03 | |
27 | ||
28 | /* max number of write urbs in flight */ | |
29 | #define URB_UPPER_LIMIT 8 | |
30 | ||
31 | /* This driver works for the Opticon 1D barcode reader | |
32 | * an examples of 1D barcode types are EAN, UPC, Code39, IATA etc.. */ | |
33 | #define DRIVER_DESC "Opticon USB barcode to serial driver (1D)" | |
34 | ||
7d40d7e8 | 35 | static const struct usb_device_id id_table[] = { |
57262b82 GKH |
36 | { USB_DEVICE(0x065a, 0x0009) }, |
37 | { }, | |
38 | }; | |
39 | MODULE_DEVICE_TABLE(usb, id_table); | |
40 | ||
41 | /* This structure holds all of the individual device information */ | |
42 | struct opticon_private { | |
57262b82 GKH |
43 | struct usb_serial_port *port; |
44 | unsigned char *bulk_in_buffer; | |
45 | struct urb *bulk_read_urb; | |
46 | int buffer_size; | |
47 | u8 bulk_address; | |
48 | spinlock_t lock; /* protects the following flags */ | |
49 | bool throttled; | |
50 | bool actually_throttled; | |
51 | bool rts; | |
309a0579 | 52 | bool cts; |
648d4e16 | 53 | int outstanding_urbs; |
57262b82 GKH |
54 | }; |
55 | ||
648d4e16 | 56 | |
309a0579 MJ |
57 | |
58 | static void opticon_read_bulk_callback(struct urb *urb) | |
57262b82 GKH |
59 | { |
60 | struct opticon_private *priv = urb->context; | |
61 | unsigned char *data = urb->transfer_buffer; | |
62 | struct usb_serial_port *port = priv->port; | |
63 | int status = urb->status; | |
64 | struct tty_struct *tty; | |
65 | int result; | |
57262b82 | 66 | int data_length; |
309a0579 | 67 | unsigned long flags; |
57262b82 | 68 | |
57262b82 GKH |
69 | switch (status) { |
70 | case 0: | |
71 | /* success */ | |
72 | break; | |
73 | case -ECONNRESET: | |
74 | case -ENOENT: | |
75 | case -ESHUTDOWN: | |
76 | /* this urb is terminated, clean up */ | |
e29a7738 | 77 | dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", |
d44d9ab7 | 78 | __func__, status); |
57262b82 GKH |
79 | return; |
80 | default: | |
e29a7738 | 81 | dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", |
d44d9ab7 | 82 | __func__, status); |
57262b82 GKH |
83 | goto exit; |
84 | } | |
85 | ||
59d33f2f | 86 | usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); |
57262b82 GKH |
87 | |
88 | if (urb->actual_length > 2) { | |
89 | data_length = urb->actual_length - 2; | |
90 | ||
91 | /* | |
92 | * Data from the device comes with a 2 byte header: | |
93 | * | |
94 | * <0x00><0x00>data... | |
309a0579 | 95 | * This is real data to be sent to the tty layer |
57262b82 | 96 | * <0x00><0x01)level |
309a0579 MJ |
97 | * This is a CTS level change, the third byte is the CTS |
98 | * value (0 for low, 1 for high). | |
57262b82 GKH |
99 | */ |
100 | if ((data[0] == 0x00) && (data[1] == 0x00)) { | |
101 | /* real data, send it to the tty layer */ | |
102 | tty = tty_port_tty_get(&port->port); | |
103 | if (tty) { | |
97cd8dc4 AZ |
104 | tty_insert_flip_string(tty, data + 2, |
105 | data_length); | |
a108bfcb | 106 | tty_flip_buffer_push(tty); |
57262b82 GKH |
107 | tty_kref_put(tty); |
108 | } | |
109 | } else { | |
110 | if ((data[0] == 0x00) && (data[1] == 0x01)) { | |
309a0579 | 111 | spin_lock_irqsave(&priv->lock, flags); |
25985edc | 112 | /* CTS status information package */ |
57262b82 | 113 | if (data[2] == 0x00) |
309a0579 | 114 | priv->cts = false; |
57262b82 | 115 | else |
309a0579 MJ |
116 | priv->cts = true; |
117 | spin_unlock_irqrestore(&priv->lock, flags); | |
57262b82 | 118 | } else { |
e29a7738 | 119 | dev_dbg(&port->dev, |
c6f694af AZ |
120 | "Unknown data packet received from the device:" |
121 | " %2x %2x\n", | |
122 | data[0], data[1]); | |
57262b82 GKH |
123 | } |
124 | } | |
125 | } else { | |
e29a7738 | 126 | dev_dbg(&port->dev, |
9ddc5b6f | 127 | "Improper amount of data received from the device, " |
57262b82 GKH |
128 | "%d bytes", urb->actual_length); |
129 | } | |
130 | ||
131 | exit: | |
132 | spin_lock(&priv->lock); | |
133 | ||
134 | /* Continue trying to always read if we should */ | |
135 | if (!priv->throttled) { | |
97cd8dc4 | 136 | result = usb_submit_urb(priv->bulk_read_urb, GFP_ATOMIC); |
57262b82 GKH |
137 | if (result) |
138 | dev_err(&port->dev, | |
139 | "%s - failed resubmitting read urb, error %d\n", | |
140 | __func__, result); | |
141 | } else | |
142 | priv->actually_throttled = true; | |
143 | spin_unlock(&priv->lock); | |
144 | } | |
145 | ||
309a0579 MJ |
146 | static int send_control_msg(struct usb_serial_port *port, u8 requesttype, |
147 | u8 val) | |
148 | { | |
149 | struct usb_serial *serial = port->serial; | |
150 | int retval; | |
ea0dbebf JH |
151 | u8 *buffer; |
152 | ||
153 | buffer = kzalloc(1, GFP_KERNEL); | |
154 | if (!buffer) | |
155 | return -ENOMEM; | |
309a0579 MJ |
156 | |
157 | buffer[0] = val; | |
158 | /* Send the message to the vendor control endpoint | |
159 | * of the connected device */ | |
160 | retval = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
161 | requesttype, | |
162 | USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE, | |
163 | 0, 0, buffer, 1, 0); | |
ea0dbebf | 164 | kfree(buffer); |
309a0579 MJ |
165 | |
166 | return retval; | |
167 | } | |
168 | ||
a509a7e4 | 169 | static int opticon_open(struct tty_struct *tty, struct usb_serial_port *port) |
57262b82 GKH |
170 | { |
171 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
172 | unsigned long flags; | |
173 | int result = 0; | |
174 | ||
57262b82 GKH |
175 | spin_lock_irqsave(&priv->lock, flags); |
176 | priv->throttled = false; | |
177 | priv->actually_throttled = false; | |
178 | priv->port = port; | |
309a0579 | 179 | priv->rts = false; |
57262b82 GKH |
180 | spin_unlock_irqrestore(&priv->lock, flags); |
181 | ||
309a0579 MJ |
182 | /* Clear RTS line */ |
183 | send_control_msg(port, CONTROL_RTS, 0); | |
184 | ||
309a0579 | 185 | /* clear the halt status of the enpoint */ |
3157fad9 | 186 | usb_clear_halt(port->serial->dev, priv->bulk_read_urb->pipe); |
309a0579 | 187 | |
57262b82 GKH |
188 | result = usb_submit_urb(priv->bulk_read_urb, GFP_KERNEL); |
189 | if (result) | |
190 | dev_err(&port->dev, | |
191 | "%s - failed resubmitting read urb, error %d\n", | |
192 | __func__, result); | |
309a0579 MJ |
193 | /* Request CTS line state, sometimes during opening the current |
194 | * CTS state can be missed. */ | |
195 | send_control_msg(port, RESEND_CTS_STATE, 1); | |
57262b82 GKH |
196 | return result; |
197 | } | |
198 | ||
335f8514 | 199 | static void opticon_close(struct usb_serial_port *port) |
57262b82 GKH |
200 | { |
201 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
202 | ||
57262b82 GKH |
203 | /* shutdown our urbs */ |
204 | usb_kill_urb(priv->bulk_read_urb); | |
205 | } | |
206 | ||
309a0579 | 207 | static void opticon_write_control_callback(struct urb *urb) |
648d4e16 GKH |
208 | { |
209 | struct opticon_private *priv = urb->context; | |
210 | int status = urb->status; | |
211 | unsigned long flags; | |
212 | ||
213 | /* free up the transfer buffer, as usb_free_urb() does not do this */ | |
214 | kfree(urb->transfer_buffer); | |
215 | ||
0d930e51 AZ |
216 | /* setup packet may be set if we're using it for writing */ |
217 | kfree(urb->setup_packet); | |
218 | ||
648d4e16 | 219 | if (status) |
e29a7738 JH |
220 | dev_dbg(&priv->port->dev, |
221 | "%s - non-zero urb status received: %d\n", | |
d44d9ab7 | 222 | __func__, status); |
648d4e16 GKH |
223 | |
224 | spin_lock_irqsave(&priv->lock, flags); | |
225 | --priv->outstanding_urbs; | |
226 | spin_unlock_irqrestore(&priv->lock, flags); | |
227 | ||
228 | usb_serial_port_softint(priv->port); | |
229 | } | |
230 | ||
231 | static int opticon_write(struct tty_struct *tty, struct usb_serial_port *port, | |
232 | const unsigned char *buf, int count) | |
233 | { | |
234 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
235 | struct usb_serial *serial = port->serial; | |
236 | struct urb *urb; | |
237 | unsigned char *buffer; | |
238 | unsigned long flags; | |
239 | int status; | |
309a0579 | 240 | struct usb_ctrlrequest *dr; |
648d4e16 | 241 | |
648d4e16 GKH |
242 | spin_lock_irqsave(&priv->lock, flags); |
243 | if (priv->outstanding_urbs > URB_UPPER_LIMIT) { | |
244 | spin_unlock_irqrestore(&priv->lock, flags); | |
d44d9ab7 | 245 | dev_dbg(&port->dev, "%s - write limit hit\n", __func__); |
648d4e16 GKH |
246 | return 0; |
247 | } | |
248 | priv->outstanding_urbs++; | |
249 | spin_unlock_irqrestore(&priv->lock, flags); | |
250 | ||
251 | buffer = kmalloc(count, GFP_ATOMIC); | |
252 | if (!buffer) { | |
253 | dev_err(&port->dev, "out of memory\n"); | |
254 | count = -ENOMEM; | |
309a0579 | 255 | |
648d4e16 GKH |
256 | goto error_no_buffer; |
257 | } | |
258 | ||
259 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
260 | if (!urb) { | |
261 | dev_err(&port->dev, "no more free urbs\n"); | |
262 | count = -ENOMEM; | |
263 | goto error_no_urb; | |
264 | } | |
265 | ||
266 | memcpy(buffer, buf, count); | |
267 | ||
59d33f2f | 268 | usb_serial_debug_data(&port->dev, __func__, count, buffer); |
648d4e16 | 269 | |
309a0579 MJ |
270 | /* The conncected devices do not have a bulk write endpoint, |
271 | * to transmit data to de barcode device the control endpoint is used */ | |
272 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_NOIO); | |
b0795bbf JL |
273 | if (!dr) { |
274 | dev_err(&port->dev, "out of memory\n"); | |
275 | count = -ENOMEM; | |
acbf0e52 | 276 | goto error_no_dr; |
b0795bbf | 277 | } |
309a0579 MJ |
278 | |
279 | dr->bRequestType = USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT; | |
280 | dr->bRequest = 0x01; | |
281 | dr->wValue = 0; | |
282 | dr->wIndex = 0; | |
283 | dr->wLength = cpu_to_le16(count); | |
284 | ||
285 | usb_fill_control_urb(urb, serial->dev, | |
286 | usb_sndctrlpipe(serial->dev, 0), | |
287 | (unsigned char *)dr, buffer, count, | |
288 | opticon_write_control_callback, priv); | |
648d4e16 GKH |
289 | |
290 | /* send it down the pipe */ | |
291 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
292 | if (status) { | |
293 | dev_err(&port->dev, | |
309a0579 | 294 | "%s - usb_submit_urb(write endpoint) failed status = %d\n", |
648d4e16 GKH |
295 | __func__, status); |
296 | count = status; | |
297 | goto error; | |
298 | } | |
299 | ||
300 | /* we are done with this urb, so let the host driver | |
301 | * really free it when it is finished with it */ | |
302 | usb_free_urb(urb); | |
303 | ||
304 | return count; | |
305 | error: | |
acbf0e52 JH |
306 | kfree(dr); |
307 | error_no_dr: | |
648d4e16 GKH |
308 | usb_free_urb(urb); |
309 | error_no_urb: | |
310 | kfree(buffer); | |
311 | error_no_buffer: | |
312 | spin_lock_irqsave(&priv->lock, flags); | |
313 | --priv->outstanding_urbs; | |
314 | spin_unlock_irqrestore(&priv->lock, flags); | |
315 | return count; | |
316 | } | |
317 | ||
318 | static int opticon_write_room(struct tty_struct *tty) | |
319 | { | |
320 | struct usb_serial_port *port = tty->driver_data; | |
321 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
322 | unsigned long flags; | |
323 | ||
648d4e16 GKH |
324 | /* |
325 | * We really can take almost anything the user throws at us | |
326 | * but let's pick a nice big number to tell the tty | |
327 | * layer that we have lots of free space, unless we don't. | |
328 | */ | |
329 | spin_lock_irqsave(&priv->lock, flags); | |
330 | if (priv->outstanding_urbs > URB_UPPER_LIMIT * 2 / 3) { | |
331 | spin_unlock_irqrestore(&priv->lock, flags); | |
d44d9ab7 | 332 | dev_dbg(&port->dev, "%s - write limit hit\n", __func__); |
648d4e16 GKH |
333 | return 0; |
334 | } | |
335 | spin_unlock_irqrestore(&priv->lock, flags); | |
336 | ||
337 | return 2048; | |
338 | } | |
339 | ||
57262b82 GKH |
340 | static void opticon_throttle(struct tty_struct *tty) |
341 | { | |
342 | struct usb_serial_port *port = tty->driver_data; | |
343 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
344 | unsigned long flags; | |
345 | ||
57262b82 GKH |
346 | spin_lock_irqsave(&priv->lock, flags); |
347 | priv->throttled = true; | |
348 | spin_unlock_irqrestore(&priv->lock, flags); | |
349 | } | |
350 | ||
351 | ||
352 | static void opticon_unthrottle(struct tty_struct *tty) | |
353 | { | |
354 | struct usb_serial_port *port = tty->driver_data; | |
355 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
356 | unsigned long flags; | |
88fa6590 | 357 | int result, was_throttled; |
57262b82 | 358 | |
57262b82 GKH |
359 | spin_lock_irqsave(&priv->lock, flags); |
360 | priv->throttled = false; | |
88fa6590 | 361 | was_throttled = priv->actually_throttled; |
57262b82 GKH |
362 | priv->actually_throttled = false; |
363 | spin_unlock_irqrestore(&priv->lock, flags); | |
364 | ||
88fa6590 ON |
365 | if (was_throttled) { |
366 | result = usb_submit_urb(priv->bulk_read_urb, GFP_ATOMIC); | |
367 | if (result) | |
368 | dev_err(&port->dev, | |
369 | "%s - failed submitting read urb, error %d\n", | |
57262b82 | 370 | __func__, result); |
88fa6590 | 371 | } |
57262b82 GKH |
372 | } |
373 | ||
60b33c13 | 374 | static int opticon_tiocmget(struct tty_struct *tty) |
faac64ad GKH |
375 | { |
376 | struct usb_serial_port *port = tty->driver_data; | |
377 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
378 | unsigned long flags; | |
379 | int result = 0; | |
380 | ||
faac64ad GKH |
381 | spin_lock_irqsave(&priv->lock, flags); |
382 | if (priv->rts) | |
309a0579 MJ |
383 | result |= TIOCM_RTS; |
384 | if (priv->cts) | |
385 | result |= TIOCM_CTS; | |
faac64ad GKH |
386 | spin_unlock_irqrestore(&priv->lock, flags); |
387 | ||
d44d9ab7 | 388 | dev_dbg(&port->dev, "%s - %x\n", __func__, result); |
faac64ad GKH |
389 | return result; |
390 | } | |
391 | ||
4acfaf82 | 392 | static int opticon_tiocmset(struct tty_struct *tty, |
309a0579 MJ |
393 | unsigned int set, unsigned int clear) |
394 | { | |
395 | struct usb_serial_port *port = tty->driver_data; | |
81d5a672 | 396 | struct usb_serial *serial = port->serial; |
309a0579 MJ |
397 | struct opticon_private *priv = usb_get_serial_data(port->serial); |
398 | unsigned long flags; | |
399 | bool rts; | |
400 | bool changed = false; | |
81d5a672 | 401 | int ret; |
309a0579 | 402 | |
309a0579 MJ |
403 | /* We only support RTS so we only handle that */ |
404 | spin_lock_irqsave(&priv->lock, flags); | |
405 | ||
406 | rts = priv->rts; | |
407 | if (set & TIOCM_RTS) | |
408 | priv->rts = true; | |
409 | if (clear & TIOCM_RTS) | |
410 | priv->rts = false; | |
411 | changed = rts ^ priv->rts; | |
412 | spin_unlock_irqrestore(&priv->lock, flags); | |
413 | ||
414 | if (!changed) | |
415 | return 0; | |
416 | ||
417 | /* Send the new RTS state to the connected device */ | |
81d5a672 JH |
418 | mutex_lock(&serial->disc_mutex); |
419 | if (!serial->disconnected) | |
420 | ret = send_control_msg(port, CONTROL_RTS, !rts); | |
421 | else | |
422 | ret = -ENODEV; | |
423 | mutex_unlock(&serial->disc_mutex); | |
424 | ||
425 | return ret; | |
309a0579 MJ |
426 | } |
427 | ||
faac64ad GKH |
428 | static int get_serial_info(struct opticon_private *priv, |
429 | struct serial_struct __user *serial) | |
430 | { | |
431 | struct serial_struct tmp; | |
432 | ||
433 | if (!serial) | |
434 | return -EFAULT; | |
435 | ||
436 | memset(&tmp, 0x00, sizeof(tmp)); | |
437 | ||
438 | /* fake emulate a 16550 uart to make userspace code happy */ | |
439 | tmp.type = PORT_16550A; | |
37203d6f | 440 | tmp.line = priv->port->serial->minor; |
faac64ad GKH |
441 | tmp.port = 0; |
442 | tmp.irq = 0; | |
443 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
444 | tmp.xmit_fifo_size = 1024; | |
445 | tmp.baud_base = 9600; | |
446 | tmp.close_delay = 5*HZ; | |
447 | tmp.closing_wait = 30*HZ; | |
448 | ||
449 | if (copy_to_user(serial, &tmp, sizeof(*serial))) | |
450 | return -EFAULT; | |
451 | return 0; | |
452 | } | |
453 | ||
00a0d0d6 | 454 | static int opticon_ioctl(struct tty_struct *tty, |
faac64ad GKH |
455 | unsigned int cmd, unsigned long arg) |
456 | { | |
457 | struct usb_serial_port *port = tty->driver_data; | |
458 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
459 | ||
d44d9ab7 | 460 | dev_dbg(&port->dev, "%s - port %d, cmd = 0x%x\n", __func__, port->number, cmd); |
faac64ad GKH |
461 | |
462 | switch (cmd) { | |
463 | case TIOCGSERIAL: | |
464 | return get_serial_info(priv, | |
465 | (struct serial_struct __user *)arg); | |
466 | } | |
467 | ||
468 | return -ENOIOCTLCMD; | |
469 | } | |
470 | ||
57262b82 GKH |
471 | static int opticon_startup(struct usb_serial *serial) |
472 | { | |
473 | struct opticon_private *priv; | |
57262b82 | 474 | int retval = -ENOMEM; |
a0a5fd92 JH |
475 | |
476 | if (!serial->num_bulk_in) { | |
477 | dev_err(&serial->dev->dev, "no bulk in endpoint\n"); | |
478 | return -ENODEV; | |
479 | } | |
57262b82 GKH |
480 | |
481 | /* create our private serial structure */ | |
482 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
483 | if (priv == NULL) { | |
484 | dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__); | |
485 | return -ENOMEM; | |
486 | } | |
487 | spin_lock_init(&priv->lock); | |
57262b82 | 488 | priv->port = serial->port[0]; |
57262b82 | 489 | |
a0a5fd92 JH |
490 | priv->bulk_read_urb = usb_alloc_urb(0, GFP_KERNEL); |
491 | if (!priv->bulk_read_urb) { | |
492 | dev_err(&serial->dev->dev, "out of memory\n"); | |
493 | goto error; | |
494 | } | |
57262b82 | 495 | |
a0a5fd92 JH |
496 | priv->buffer_size = 2 * priv->port->bulk_in_size; |
497 | priv->bulk_in_buffer = kmalloc(priv->buffer_size, GFP_KERNEL); | |
498 | if (!priv->bulk_in_buffer) { | |
499 | dev_err(&serial->dev->dev, "out of memory\n"); | |
57262b82 GKH |
500 | goto error; |
501 | } | |
502 | ||
a0a5fd92 JH |
503 | priv->bulk_address = priv->port->bulk_in_endpointAddress; |
504 | ||
0b8718a2 JH |
505 | usb_fill_bulk_urb(priv->bulk_read_urb, serial->dev, |
506 | usb_rcvbulkpipe(serial->dev, | |
507 | priv->bulk_address), | |
508 | priv->bulk_in_buffer, priv->buffer_size, | |
509 | opticon_read_bulk_callback, priv); | |
510 | ||
57262b82 GKH |
511 | usb_set_serial_data(serial, priv); |
512 | return 0; | |
513 | ||
514 | error: | |
515 | usb_free_urb(priv->bulk_read_urb); | |
516 | kfree(priv->bulk_in_buffer); | |
517 | kfree(priv); | |
518 | return retval; | |
519 | } | |
520 | ||
f9c99bb8 AS |
521 | static void opticon_release(struct usb_serial *serial) |
522 | { | |
523 | struct opticon_private *priv = usb_get_serial_data(serial); | |
524 | ||
70f9bf65 | 525 | usb_free_urb(priv->bulk_read_urb); |
57262b82 GKH |
526 | kfree(priv->bulk_in_buffer); |
527 | kfree(priv); | |
57262b82 GKH |
528 | } |
529 | ||
d530296f | 530 | static int opticon_suspend(struct usb_serial *serial, pm_message_t message) |
d1c0713d | 531 | { |
d1c0713d ON |
532 | struct opticon_private *priv = usb_get_serial_data(serial); |
533 | ||
534 | usb_kill_urb(priv->bulk_read_urb); | |
535 | return 0; | |
536 | } | |
537 | ||
d530296f | 538 | static int opticon_resume(struct usb_serial *serial) |
d1c0713d | 539 | { |
d1c0713d ON |
540 | struct opticon_private *priv = usb_get_serial_data(serial); |
541 | struct usb_serial_port *port = serial->port[0]; | |
542 | int result; | |
543 | ||
82fc5943 | 544 | mutex_lock(&port->port.mutex); |
2a0785ea AC |
545 | /* This is protected by the port mutex against close/open */ |
546 | if (test_bit(ASYNCB_INITIALIZED, &port->port.flags)) | |
d1c0713d ON |
547 | result = usb_submit_urb(priv->bulk_read_urb, GFP_NOIO); |
548 | else | |
549 | result = 0; | |
82fc5943 | 550 | mutex_unlock(&port->port.mutex); |
d1c0713d ON |
551 | return result; |
552 | } | |
57262b82 | 553 | |
57262b82 GKH |
554 | static struct usb_serial_driver opticon_device = { |
555 | .driver = { | |
556 | .owner = THIS_MODULE, | |
557 | .name = "opticon", | |
558 | }, | |
559 | .id_table = id_table, | |
57262b82 GKH |
560 | .num_ports = 1, |
561 | .attach = opticon_startup, | |
562 | .open = opticon_open, | |
563 | .close = opticon_close, | |
648d4e16 GKH |
564 | .write = opticon_write, |
565 | .write_room = opticon_write_room, | |
f9c99bb8 | 566 | .release = opticon_release, |
57262b82 GKH |
567 | .throttle = opticon_throttle, |
568 | .unthrottle = opticon_unthrottle, | |
faac64ad GKH |
569 | .ioctl = opticon_ioctl, |
570 | .tiocmget = opticon_tiocmget, | |
309a0579 | 571 | .tiocmset = opticon_tiocmset, |
d530296f GKH |
572 | .suspend = opticon_suspend, |
573 | .resume = opticon_resume, | |
57262b82 GKH |
574 | }; |
575 | ||
f667ddad AS |
576 | static struct usb_serial_driver * const serial_drivers[] = { |
577 | &opticon_device, NULL | |
578 | }; | |
579 | ||
68e24113 | 580 | module_usb_serial_driver(serial_drivers, id_table); |
57262b82 | 581 | |
309a0579 | 582 | MODULE_DESCRIPTION(DRIVER_DESC); |
57262b82 | 583 | MODULE_LICENSE("GPL"); |