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 | unsigned char *bulk_in_buffer; |
44 | struct urb *bulk_read_urb; | |
45 | int buffer_size; | |
46 | u8 bulk_address; | |
47 | spinlock_t lock; /* protects the following flags */ | |
48 | bool throttled; | |
49 | bool actually_throttled; | |
50 | bool rts; | |
309a0579 | 51 | bool cts; |
648d4e16 | 52 | int outstanding_urbs; |
57262b82 GKH |
53 | }; |
54 | ||
648d4e16 | 55 | |
309a0579 MJ |
56 | |
57 | static void opticon_read_bulk_callback(struct urb *urb) | |
57262b82 | 58 | { |
e32d82bc JH |
59 | struct usb_serial_port *port = urb->context; |
60 | struct opticon_private *priv = usb_get_serial_port_data(port); | |
57262b82 | 61 | unsigned char *data = urb->transfer_buffer; |
57262b82 GKH |
62 | int status = urb->status; |
63 | struct tty_struct *tty; | |
64 | int result; | |
57262b82 | 65 | int data_length; |
309a0579 | 66 | unsigned long flags; |
57262b82 | 67 | |
57262b82 GKH |
68 | switch (status) { |
69 | case 0: | |
70 | /* success */ | |
71 | break; | |
72 | case -ECONNRESET: | |
73 | case -ENOENT: | |
74 | case -ESHUTDOWN: | |
75 | /* this urb is terminated, clean up */ | |
e29a7738 | 76 | dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", |
d44d9ab7 | 77 | __func__, status); |
57262b82 GKH |
78 | return; |
79 | default: | |
e29a7738 | 80 | dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", |
d44d9ab7 | 81 | __func__, status); |
57262b82 GKH |
82 | goto exit; |
83 | } | |
84 | ||
59d33f2f | 85 | usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); |
57262b82 GKH |
86 | |
87 | if (urb->actual_length > 2) { | |
88 | data_length = urb->actual_length - 2; | |
89 | ||
90 | /* | |
91 | * Data from the device comes with a 2 byte header: | |
92 | * | |
93 | * <0x00><0x00>data... | |
309a0579 | 94 | * This is real data to be sent to the tty layer |
57262b82 | 95 | * <0x00><0x01)level |
309a0579 MJ |
96 | * This is a CTS level change, the third byte is the CTS |
97 | * value (0 for low, 1 for high). | |
57262b82 GKH |
98 | */ |
99 | if ((data[0] == 0x00) && (data[1] == 0x00)) { | |
100 | /* real data, send it to the tty layer */ | |
101 | tty = tty_port_tty_get(&port->port); | |
102 | if (tty) { | |
97cd8dc4 AZ |
103 | tty_insert_flip_string(tty, data + 2, |
104 | data_length); | |
a108bfcb | 105 | tty_flip_buffer_push(tty); |
57262b82 GKH |
106 | tty_kref_put(tty); |
107 | } | |
108 | } else { | |
109 | if ((data[0] == 0x00) && (data[1] == 0x01)) { | |
309a0579 | 110 | spin_lock_irqsave(&priv->lock, flags); |
25985edc | 111 | /* CTS status information package */ |
57262b82 | 112 | if (data[2] == 0x00) |
309a0579 | 113 | priv->cts = false; |
57262b82 | 114 | else |
309a0579 MJ |
115 | priv->cts = true; |
116 | spin_unlock_irqrestore(&priv->lock, flags); | |
57262b82 | 117 | } else { |
e29a7738 | 118 | dev_dbg(&port->dev, |
c6f694af AZ |
119 | "Unknown data packet received from the device:" |
120 | " %2x %2x\n", | |
121 | data[0], data[1]); | |
57262b82 GKH |
122 | } |
123 | } | |
124 | } else { | |
e29a7738 | 125 | dev_dbg(&port->dev, |
9ddc5b6f | 126 | "Improper amount of data received from the device, " |
57262b82 GKH |
127 | "%d bytes", urb->actual_length); |
128 | } | |
129 | ||
130 | exit: | |
131 | spin_lock(&priv->lock); | |
132 | ||
133 | /* Continue trying to always read if we should */ | |
134 | if (!priv->throttled) { | |
97cd8dc4 | 135 | result = usb_submit_urb(priv->bulk_read_urb, GFP_ATOMIC); |
57262b82 GKH |
136 | if (result) |
137 | dev_err(&port->dev, | |
138 | "%s - failed resubmitting read urb, error %d\n", | |
139 | __func__, result); | |
140 | } else | |
141 | priv->actually_throttled = true; | |
142 | spin_unlock(&priv->lock); | |
143 | } | |
144 | ||
309a0579 MJ |
145 | static int send_control_msg(struct usb_serial_port *port, u8 requesttype, |
146 | u8 val) | |
147 | { | |
148 | struct usb_serial *serial = port->serial; | |
149 | int retval; | |
ea0dbebf JH |
150 | u8 *buffer; |
151 | ||
152 | buffer = kzalloc(1, GFP_KERNEL); | |
153 | if (!buffer) | |
154 | return -ENOMEM; | |
309a0579 MJ |
155 | |
156 | buffer[0] = val; | |
157 | /* Send the message to the vendor control endpoint | |
158 | * of the connected device */ | |
159 | retval = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
160 | requesttype, | |
161 | USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE, | |
162 | 0, 0, buffer, 1, 0); | |
ea0dbebf | 163 | kfree(buffer); |
309a0579 MJ |
164 | |
165 | return retval; | |
166 | } | |
167 | ||
a509a7e4 | 168 | static int opticon_open(struct tty_struct *tty, struct usb_serial_port *port) |
57262b82 | 169 | { |
70d25eee | 170 | struct opticon_private *priv = usb_get_serial_port_data(port); |
57262b82 GKH |
171 | unsigned long flags; |
172 | int result = 0; | |
173 | ||
57262b82 GKH |
174 | spin_lock_irqsave(&priv->lock, flags); |
175 | priv->throttled = false; | |
176 | priv->actually_throttled = false; | |
309a0579 | 177 | priv->rts = false; |
57262b82 GKH |
178 | spin_unlock_irqrestore(&priv->lock, flags); |
179 | ||
309a0579 MJ |
180 | /* Clear RTS line */ |
181 | send_control_msg(port, CONTROL_RTS, 0); | |
182 | ||
309a0579 | 183 | /* clear the halt status of the enpoint */ |
3157fad9 | 184 | usb_clear_halt(port->serial->dev, priv->bulk_read_urb->pipe); |
309a0579 | 185 | |
57262b82 GKH |
186 | result = usb_submit_urb(priv->bulk_read_urb, GFP_KERNEL); |
187 | if (result) | |
188 | dev_err(&port->dev, | |
189 | "%s - failed resubmitting read urb, error %d\n", | |
190 | __func__, result); | |
309a0579 MJ |
191 | /* Request CTS line state, sometimes during opening the current |
192 | * CTS state can be missed. */ | |
193 | send_control_msg(port, RESEND_CTS_STATE, 1); | |
57262b82 GKH |
194 | return result; |
195 | } | |
196 | ||
335f8514 | 197 | static void opticon_close(struct usb_serial_port *port) |
57262b82 | 198 | { |
70d25eee | 199 | struct opticon_private *priv = usb_get_serial_port_data(port); |
57262b82 | 200 | |
57262b82 GKH |
201 | /* shutdown our urbs */ |
202 | usb_kill_urb(priv->bulk_read_urb); | |
203 | } | |
204 | ||
309a0579 | 205 | static void opticon_write_control_callback(struct urb *urb) |
648d4e16 | 206 | { |
e32d82bc JH |
207 | struct usb_serial_port *port = urb->context; |
208 | struct opticon_private *priv = usb_get_serial_port_data(port); | |
648d4e16 GKH |
209 | int status = urb->status; |
210 | unsigned long flags; | |
211 | ||
212 | /* free up the transfer buffer, as usb_free_urb() does not do this */ | |
213 | kfree(urb->transfer_buffer); | |
214 | ||
0d930e51 AZ |
215 | /* setup packet may be set if we're using it for writing */ |
216 | kfree(urb->setup_packet); | |
217 | ||
648d4e16 | 218 | if (status) |
e32d82bc | 219 | dev_dbg(&port->dev, |
e29a7738 | 220 | "%s - non-zero urb status received: %d\n", |
d44d9ab7 | 221 | __func__, status); |
648d4e16 GKH |
222 | |
223 | spin_lock_irqsave(&priv->lock, flags); | |
224 | --priv->outstanding_urbs; | |
225 | spin_unlock_irqrestore(&priv->lock, flags); | |
226 | ||
e32d82bc | 227 | usb_serial_port_softint(port); |
648d4e16 GKH |
228 | } |
229 | ||
230 | static int opticon_write(struct tty_struct *tty, struct usb_serial_port *port, | |
231 | const unsigned char *buf, int count) | |
232 | { | |
70d25eee | 233 | struct opticon_private *priv = usb_get_serial_port_data(port); |
648d4e16 GKH |
234 | struct usb_serial *serial = port->serial; |
235 | struct urb *urb; | |
236 | unsigned char *buffer; | |
237 | unsigned long flags; | |
238 | int status; | |
309a0579 | 239 | struct usb_ctrlrequest *dr; |
648d4e16 | 240 | |
648d4e16 GKH |
241 | spin_lock_irqsave(&priv->lock, flags); |
242 | if (priv->outstanding_urbs > URB_UPPER_LIMIT) { | |
243 | spin_unlock_irqrestore(&priv->lock, flags); | |
d44d9ab7 | 244 | dev_dbg(&port->dev, "%s - write limit hit\n", __func__); |
648d4e16 GKH |
245 | return 0; |
246 | } | |
247 | priv->outstanding_urbs++; | |
248 | spin_unlock_irqrestore(&priv->lock, flags); | |
249 | ||
250 | buffer = kmalloc(count, GFP_ATOMIC); | |
251 | if (!buffer) { | |
252 | dev_err(&port->dev, "out of memory\n"); | |
253 | count = -ENOMEM; | |
309a0579 | 254 | |
648d4e16 GKH |
255 | goto error_no_buffer; |
256 | } | |
257 | ||
258 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
259 | if (!urb) { | |
260 | dev_err(&port->dev, "no more free urbs\n"); | |
261 | count = -ENOMEM; | |
262 | goto error_no_urb; | |
263 | } | |
264 | ||
265 | memcpy(buffer, buf, count); | |
266 | ||
59d33f2f | 267 | usb_serial_debug_data(&port->dev, __func__, count, buffer); |
648d4e16 | 268 | |
309a0579 MJ |
269 | /* The conncected devices do not have a bulk write endpoint, |
270 | * to transmit data to de barcode device the control endpoint is used */ | |
271 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_NOIO); | |
b0795bbf JL |
272 | if (!dr) { |
273 | dev_err(&port->dev, "out of memory\n"); | |
274 | count = -ENOMEM; | |
acbf0e52 | 275 | goto error_no_dr; |
b0795bbf | 276 | } |
309a0579 MJ |
277 | |
278 | dr->bRequestType = USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT; | |
279 | dr->bRequest = 0x01; | |
280 | dr->wValue = 0; | |
281 | dr->wIndex = 0; | |
282 | dr->wLength = cpu_to_le16(count); | |
283 | ||
284 | usb_fill_control_urb(urb, serial->dev, | |
285 | usb_sndctrlpipe(serial->dev, 0), | |
286 | (unsigned char *)dr, buffer, count, | |
e32d82bc | 287 | opticon_write_control_callback, port); |
648d4e16 GKH |
288 | |
289 | /* send it down the pipe */ | |
290 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
291 | if (status) { | |
292 | dev_err(&port->dev, | |
309a0579 | 293 | "%s - usb_submit_urb(write endpoint) failed status = %d\n", |
648d4e16 GKH |
294 | __func__, status); |
295 | count = status; | |
296 | goto error; | |
297 | } | |
298 | ||
299 | /* we are done with this urb, so let the host driver | |
300 | * really free it when it is finished with it */ | |
301 | usb_free_urb(urb); | |
302 | ||
303 | return count; | |
304 | error: | |
acbf0e52 JH |
305 | kfree(dr); |
306 | error_no_dr: | |
648d4e16 GKH |
307 | usb_free_urb(urb); |
308 | error_no_urb: | |
309 | kfree(buffer); | |
310 | error_no_buffer: | |
311 | spin_lock_irqsave(&priv->lock, flags); | |
312 | --priv->outstanding_urbs; | |
313 | spin_unlock_irqrestore(&priv->lock, flags); | |
314 | return count; | |
315 | } | |
316 | ||
317 | static int opticon_write_room(struct tty_struct *tty) | |
318 | { | |
319 | struct usb_serial_port *port = tty->driver_data; | |
70d25eee | 320 | struct opticon_private *priv = usb_get_serial_port_data(port); |
648d4e16 GKH |
321 | unsigned long flags; |
322 | ||
648d4e16 GKH |
323 | /* |
324 | * We really can take almost anything the user throws at us | |
325 | * but let's pick a nice big number to tell the tty | |
326 | * layer that we have lots of free space, unless we don't. | |
327 | */ | |
328 | spin_lock_irqsave(&priv->lock, flags); | |
329 | if (priv->outstanding_urbs > URB_UPPER_LIMIT * 2 / 3) { | |
330 | spin_unlock_irqrestore(&priv->lock, flags); | |
d44d9ab7 | 331 | dev_dbg(&port->dev, "%s - write limit hit\n", __func__); |
648d4e16 GKH |
332 | return 0; |
333 | } | |
334 | spin_unlock_irqrestore(&priv->lock, flags); | |
335 | ||
336 | return 2048; | |
337 | } | |
338 | ||
57262b82 GKH |
339 | static void opticon_throttle(struct tty_struct *tty) |
340 | { | |
341 | struct usb_serial_port *port = tty->driver_data; | |
70d25eee | 342 | struct opticon_private *priv = usb_get_serial_port_data(port); |
57262b82 GKH |
343 | unsigned long flags; |
344 | ||
57262b82 GKH |
345 | spin_lock_irqsave(&priv->lock, flags); |
346 | priv->throttled = true; | |
347 | spin_unlock_irqrestore(&priv->lock, flags); | |
348 | } | |
349 | ||
350 | ||
351 | static void opticon_unthrottle(struct tty_struct *tty) | |
352 | { | |
353 | struct usb_serial_port *port = tty->driver_data; | |
70d25eee | 354 | struct opticon_private *priv = usb_get_serial_port_data(port); |
57262b82 | 355 | unsigned long flags; |
88fa6590 | 356 | int result, was_throttled; |
57262b82 | 357 | |
57262b82 GKH |
358 | spin_lock_irqsave(&priv->lock, flags); |
359 | priv->throttled = false; | |
88fa6590 | 360 | was_throttled = priv->actually_throttled; |
57262b82 GKH |
361 | priv->actually_throttled = false; |
362 | spin_unlock_irqrestore(&priv->lock, flags); | |
363 | ||
88fa6590 ON |
364 | if (was_throttled) { |
365 | result = usb_submit_urb(priv->bulk_read_urb, GFP_ATOMIC); | |
366 | if (result) | |
367 | dev_err(&port->dev, | |
368 | "%s - failed submitting read urb, error %d\n", | |
57262b82 | 369 | __func__, result); |
88fa6590 | 370 | } |
57262b82 GKH |
371 | } |
372 | ||
60b33c13 | 373 | static int opticon_tiocmget(struct tty_struct *tty) |
faac64ad GKH |
374 | { |
375 | struct usb_serial_port *port = tty->driver_data; | |
70d25eee | 376 | struct opticon_private *priv = usb_get_serial_port_data(port); |
faac64ad GKH |
377 | unsigned long flags; |
378 | int result = 0; | |
379 | ||
faac64ad GKH |
380 | spin_lock_irqsave(&priv->lock, flags); |
381 | if (priv->rts) | |
309a0579 MJ |
382 | result |= TIOCM_RTS; |
383 | if (priv->cts) | |
384 | result |= TIOCM_CTS; | |
faac64ad GKH |
385 | spin_unlock_irqrestore(&priv->lock, flags); |
386 | ||
d44d9ab7 | 387 | dev_dbg(&port->dev, "%s - %x\n", __func__, result); |
faac64ad GKH |
388 | return result; |
389 | } | |
390 | ||
4acfaf82 | 391 | static int opticon_tiocmset(struct tty_struct *tty, |
309a0579 MJ |
392 | unsigned int set, unsigned int clear) |
393 | { | |
394 | struct usb_serial_port *port = tty->driver_data; | |
81d5a672 | 395 | struct usb_serial *serial = port->serial; |
70d25eee | 396 | struct opticon_private *priv = usb_get_serial_port_data(port); |
309a0579 MJ |
397 | unsigned long flags; |
398 | bool rts; | |
399 | bool changed = false; | |
81d5a672 | 400 | int ret; |
309a0579 | 401 | |
309a0579 MJ |
402 | /* We only support RTS so we only handle that */ |
403 | spin_lock_irqsave(&priv->lock, flags); | |
404 | ||
405 | rts = priv->rts; | |
406 | if (set & TIOCM_RTS) | |
407 | priv->rts = true; | |
408 | if (clear & TIOCM_RTS) | |
409 | priv->rts = false; | |
410 | changed = rts ^ priv->rts; | |
411 | spin_unlock_irqrestore(&priv->lock, flags); | |
412 | ||
413 | if (!changed) | |
414 | return 0; | |
415 | ||
416 | /* Send the new RTS state to the connected device */ | |
81d5a672 JH |
417 | mutex_lock(&serial->disc_mutex); |
418 | if (!serial->disconnected) | |
419 | ret = send_control_msg(port, CONTROL_RTS, !rts); | |
420 | else | |
421 | ret = -ENODEV; | |
422 | mutex_unlock(&serial->disc_mutex); | |
423 | ||
424 | return ret; | |
309a0579 MJ |
425 | } |
426 | ||
56be1a17 | 427 | static int get_serial_info(struct usb_serial_port *port, |
faac64ad GKH |
428 | struct serial_struct __user *serial) |
429 | { | |
430 | struct serial_struct tmp; | |
431 | ||
432 | if (!serial) | |
433 | return -EFAULT; | |
434 | ||
435 | memset(&tmp, 0x00, sizeof(tmp)); | |
436 | ||
437 | /* fake emulate a 16550 uart to make userspace code happy */ | |
438 | tmp.type = PORT_16550A; | |
56be1a17 | 439 | tmp.line = port->serial->minor; |
faac64ad GKH |
440 | tmp.port = 0; |
441 | tmp.irq = 0; | |
442 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
443 | tmp.xmit_fifo_size = 1024; | |
444 | tmp.baud_base = 9600; | |
445 | tmp.close_delay = 5*HZ; | |
446 | tmp.closing_wait = 30*HZ; | |
447 | ||
448 | if (copy_to_user(serial, &tmp, sizeof(*serial))) | |
449 | return -EFAULT; | |
450 | return 0; | |
451 | } | |
452 | ||
00a0d0d6 | 453 | static int opticon_ioctl(struct tty_struct *tty, |
faac64ad GKH |
454 | unsigned int cmd, unsigned long arg) |
455 | { | |
456 | struct usb_serial_port *port = tty->driver_data; | |
faac64ad | 457 | |
d44d9ab7 | 458 | dev_dbg(&port->dev, "%s - port %d, cmd = 0x%x\n", __func__, port->number, cmd); |
faac64ad GKH |
459 | |
460 | switch (cmd) { | |
461 | case TIOCGSERIAL: | |
56be1a17 | 462 | return get_serial_info(port, |
faac64ad GKH |
463 | (struct serial_struct __user *)arg); |
464 | } | |
465 | ||
466 | return -ENOIOCTLCMD; | |
467 | } | |
468 | ||
57262b82 GKH |
469 | static int opticon_startup(struct usb_serial *serial) |
470 | { | |
a0a5fd92 JH |
471 | if (!serial->num_bulk_in) { |
472 | dev_err(&serial->dev->dev, "no bulk in endpoint\n"); | |
473 | return -ENODEV; | |
474 | } | |
57262b82 | 475 | |
70d25eee JH |
476 | return 0; |
477 | } | |
478 | ||
479 | static int opticon_port_probe(struct usb_serial_port *port) | |
480 | { | |
481 | struct usb_serial *serial = port->serial; | |
482 | struct opticon_private *priv; | |
483 | int retval = -ENOMEM; | |
484 | ||
57262b82 | 485 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
70d25eee | 486 | if (!priv) |
57262b82 | 487 | return -ENOMEM; |
70d25eee | 488 | |
57262b82 | 489 | spin_lock_init(&priv->lock); |
57262b82 | 490 | |
a0a5fd92 | 491 | priv->bulk_read_urb = usb_alloc_urb(0, GFP_KERNEL); |
70d25eee | 492 | if (!priv->bulk_read_urb) |
a0a5fd92 | 493 | goto error; |
57262b82 | 494 | |
70d25eee | 495 | priv->buffer_size = 2 * port->bulk_in_size; |
a0a5fd92 | 496 | priv->bulk_in_buffer = kmalloc(priv->buffer_size, GFP_KERNEL); |
70d25eee | 497 | if (!priv->bulk_in_buffer) |
57262b82 | 498 | goto error; |
57262b82 | 499 | |
70d25eee | 500 | priv->bulk_address = port->bulk_in_endpointAddress; |
a0a5fd92 | 501 | |
0b8718a2 JH |
502 | usb_fill_bulk_urb(priv->bulk_read_urb, serial->dev, |
503 | usb_rcvbulkpipe(serial->dev, | |
504 | priv->bulk_address), | |
505 | priv->bulk_in_buffer, priv->buffer_size, | |
e32d82bc | 506 | opticon_read_bulk_callback, port); |
0b8718a2 | 507 | |
70d25eee | 508 | usb_set_serial_port_data(port, priv); |
57262b82 | 509 | |
70d25eee | 510 | return 0; |
57262b82 GKH |
511 | error: |
512 | usb_free_urb(priv->bulk_read_urb); | |
513 | kfree(priv->bulk_in_buffer); | |
514 | kfree(priv); | |
515 | return retval; | |
516 | } | |
517 | ||
70d25eee | 518 | static int opticon_port_remove(struct usb_serial_port *port) |
f9c99bb8 | 519 | { |
70d25eee | 520 | struct opticon_private *priv = usb_get_serial_port_data(port); |
f9c99bb8 | 521 | |
70f9bf65 | 522 | usb_free_urb(priv->bulk_read_urb); |
57262b82 GKH |
523 | kfree(priv->bulk_in_buffer); |
524 | kfree(priv); | |
70d25eee JH |
525 | |
526 | return 0; | |
57262b82 GKH |
527 | } |
528 | ||
d530296f | 529 | static int opticon_suspend(struct usb_serial *serial, pm_message_t message) |
d1c0713d | 530 | { |
70d25eee JH |
531 | struct opticon_private *priv; |
532 | ||
533 | priv = usb_get_serial_port_data(serial->port[0]); | |
d1c0713d ON |
534 | |
535 | usb_kill_urb(priv->bulk_read_urb); | |
536 | return 0; | |
537 | } | |
538 | ||
d530296f | 539 | static int opticon_resume(struct usb_serial *serial) |
d1c0713d | 540 | { |
d1c0713d | 541 | struct usb_serial_port *port = serial->port[0]; |
70d25eee | 542 | struct opticon_private *priv = usb_get_serial_port_data(port); |
d1c0713d ON |
543 | int result; |
544 | ||
82fc5943 | 545 | mutex_lock(&port->port.mutex); |
2a0785ea AC |
546 | /* This is protected by the port mutex against close/open */ |
547 | if (test_bit(ASYNCB_INITIALIZED, &port->port.flags)) | |
d1c0713d ON |
548 | result = usb_submit_urb(priv->bulk_read_urb, GFP_NOIO); |
549 | else | |
550 | result = 0; | |
82fc5943 | 551 | mutex_unlock(&port->port.mutex); |
d1c0713d ON |
552 | return result; |
553 | } | |
57262b82 | 554 | |
57262b82 GKH |
555 | static struct usb_serial_driver opticon_device = { |
556 | .driver = { | |
557 | .owner = THIS_MODULE, | |
558 | .name = "opticon", | |
559 | }, | |
560 | .id_table = id_table, | |
57262b82 GKH |
561 | .num_ports = 1, |
562 | .attach = opticon_startup, | |
70d25eee JH |
563 | .port_probe = opticon_port_probe, |
564 | .port_remove = opticon_port_remove, | |
57262b82 GKH |
565 | .open = opticon_open, |
566 | .close = opticon_close, | |
648d4e16 GKH |
567 | .write = opticon_write, |
568 | .write_room = opticon_write_room, | |
57262b82 GKH |
569 | .throttle = opticon_throttle, |
570 | .unthrottle = opticon_unthrottle, | |
faac64ad GKH |
571 | .ioctl = opticon_ioctl, |
572 | .tiocmget = opticon_tiocmget, | |
309a0579 | 573 | .tiocmset = opticon_tiocmset, |
d530296f GKH |
574 | .suspend = opticon_suspend, |
575 | .resume = opticon_resume, | |
57262b82 GKH |
576 | }; |
577 | ||
f667ddad AS |
578 | static struct usb_serial_driver * const serial_drivers[] = { |
579 | &opticon_device, NULL | |
580 | }; | |
581 | ||
68e24113 | 582 | module_usb_serial_driver(serial_drivers, id_table); |
57262b82 | 583 | |
309a0579 | 584 | MODULE_DESCRIPTION(DRIVER_DESC); |
57262b82 | 585 | MODULE_LICENSE("GPL"); |