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Commit | Line | Data |
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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 | ||
57262b82 GKH |
35 | static int debug; |
36 | ||
7d40d7e8 | 37 | static const struct usb_device_id id_table[] = { |
57262b82 GKH |
38 | { USB_DEVICE(0x065a, 0x0009) }, |
39 | { }, | |
40 | }; | |
41 | MODULE_DEVICE_TABLE(usb, id_table); | |
42 | ||
43 | /* This structure holds all of the individual device information */ | |
44 | struct opticon_private { | |
45 | struct usb_device *udev; | |
46 | struct usb_serial *serial; | |
47 | struct usb_serial_port *port; | |
48 | unsigned char *bulk_in_buffer; | |
49 | struct urb *bulk_read_urb; | |
50 | int buffer_size; | |
51 | u8 bulk_address; | |
52 | spinlock_t lock; /* protects the following flags */ | |
53 | bool throttled; | |
54 | bool actually_throttled; | |
55 | bool rts; | |
309a0579 | 56 | bool cts; |
648d4e16 | 57 | int outstanding_urbs; |
57262b82 GKH |
58 | }; |
59 | ||
648d4e16 | 60 | |
309a0579 MJ |
61 | |
62 | static void opticon_read_bulk_callback(struct urb *urb) | |
57262b82 GKH |
63 | { |
64 | struct opticon_private *priv = urb->context; | |
65 | unsigned char *data = urb->transfer_buffer; | |
66 | struct usb_serial_port *port = priv->port; | |
67 | int status = urb->status; | |
68 | struct tty_struct *tty; | |
69 | int result; | |
57262b82 | 70 | int data_length; |
309a0579 | 71 | unsigned long flags; |
57262b82 GKH |
72 | |
73 | dbg("%s - port %d", __func__, port->number); | |
74 | ||
75 | switch (status) { | |
76 | case 0: | |
77 | /* success */ | |
78 | break; | |
79 | case -ECONNRESET: | |
80 | case -ENOENT: | |
81 | case -ESHUTDOWN: | |
82 | /* this urb is terminated, clean up */ | |
83 | dbg("%s - urb shutting down with status: %d", | |
84 | __func__, status); | |
85 | return; | |
86 | default: | |
87 | dbg("%s - nonzero urb status received: %d", | |
88 | __func__, status); | |
89 | goto exit; | |
90 | } | |
91 | ||
92 | usb_serial_debug_data(debug, &port->dev, __func__, urb->actual_length, | |
93 | data); | |
94 | ||
95 | if (urb->actual_length > 2) { | |
96 | data_length = urb->actual_length - 2; | |
97 | ||
98 | /* | |
99 | * Data from the device comes with a 2 byte header: | |
100 | * | |
101 | * <0x00><0x00>data... | |
309a0579 | 102 | * This is real data to be sent to the tty layer |
57262b82 | 103 | * <0x00><0x01)level |
309a0579 MJ |
104 | * This is a CTS level change, the third byte is the CTS |
105 | * value (0 for low, 1 for high). | |
57262b82 GKH |
106 | */ |
107 | if ((data[0] == 0x00) && (data[1] == 0x00)) { | |
108 | /* real data, send it to the tty layer */ | |
109 | tty = tty_port_tty_get(&port->port); | |
110 | if (tty) { | |
97cd8dc4 AZ |
111 | tty_insert_flip_string(tty, data + 2, |
112 | data_length); | |
a108bfcb | 113 | tty_flip_buffer_push(tty); |
57262b82 GKH |
114 | tty_kref_put(tty); |
115 | } | |
116 | } else { | |
117 | if ((data[0] == 0x00) && (data[1] == 0x01)) { | |
309a0579 | 118 | spin_lock_irqsave(&priv->lock, flags); |
25985edc | 119 | /* CTS status information package */ |
57262b82 | 120 | if (data[2] == 0x00) |
309a0579 | 121 | priv->cts = false; |
57262b82 | 122 | else |
309a0579 MJ |
123 | priv->cts = true; |
124 | spin_unlock_irqrestore(&priv->lock, flags); | |
57262b82 | 125 | } else { |
c6f694af AZ |
126 | dev_dbg(&priv->udev->dev, |
127 | "Unknown data packet received from the device:" | |
128 | " %2x %2x\n", | |
129 | data[0], data[1]); | |
57262b82 GKH |
130 | } |
131 | } | |
132 | } else { | |
133 | dev_dbg(&priv->udev->dev, | |
9ddc5b6f | 134 | "Improper amount of data received from the device, " |
57262b82 GKH |
135 | "%d bytes", urb->actual_length); |
136 | } | |
137 | ||
138 | exit: | |
139 | spin_lock(&priv->lock); | |
140 | ||
141 | /* Continue trying to always read if we should */ | |
142 | if (!priv->throttled) { | |
143 | usb_fill_bulk_urb(priv->bulk_read_urb, priv->udev, | |
144 | usb_rcvbulkpipe(priv->udev, | |
145 | priv->bulk_address), | |
146 | priv->bulk_in_buffer, priv->buffer_size, | |
309a0579 | 147 | opticon_read_bulk_callback, priv); |
97cd8dc4 | 148 | result = usb_submit_urb(priv->bulk_read_urb, GFP_ATOMIC); |
57262b82 GKH |
149 | if (result) |
150 | dev_err(&port->dev, | |
151 | "%s - failed resubmitting read urb, error %d\n", | |
152 | __func__, result); | |
153 | } else | |
154 | priv->actually_throttled = true; | |
155 | spin_unlock(&priv->lock); | |
156 | } | |
157 | ||
309a0579 MJ |
158 | static int send_control_msg(struct usb_serial_port *port, u8 requesttype, |
159 | u8 val) | |
160 | { | |
161 | struct usb_serial *serial = port->serial; | |
162 | int retval; | |
163 | u8 buffer[2]; | |
164 | ||
165 | buffer[0] = val; | |
166 | /* Send the message to the vendor control endpoint | |
167 | * of the connected device */ | |
168 | retval = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
169 | requesttype, | |
170 | USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE, | |
171 | 0, 0, buffer, 1, 0); | |
172 | ||
173 | return retval; | |
174 | } | |
175 | ||
a509a7e4 | 176 | static int opticon_open(struct tty_struct *tty, struct usb_serial_port *port) |
57262b82 GKH |
177 | { |
178 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
179 | unsigned long flags; | |
180 | int result = 0; | |
181 | ||
182 | dbg("%s - port %d", __func__, port->number); | |
183 | ||
184 | spin_lock_irqsave(&priv->lock, flags); | |
185 | priv->throttled = false; | |
186 | priv->actually_throttled = false; | |
187 | priv->port = port; | |
309a0579 | 188 | priv->rts = false; |
57262b82 GKH |
189 | spin_unlock_irqrestore(&priv->lock, flags); |
190 | ||
309a0579 MJ |
191 | /* Clear RTS line */ |
192 | send_control_msg(port, CONTROL_RTS, 0); | |
193 | ||
194 | /* Setup the read URB and start reading from the device */ | |
57262b82 GKH |
195 | usb_fill_bulk_urb(priv->bulk_read_urb, priv->udev, |
196 | usb_rcvbulkpipe(priv->udev, | |
197 | priv->bulk_address), | |
198 | priv->bulk_in_buffer, priv->buffer_size, | |
309a0579 MJ |
199 | opticon_read_bulk_callback, priv); |
200 | ||
201 | /* clear the halt status of the enpoint */ | |
202 | usb_clear_halt(priv->udev, priv->bulk_read_urb->pipe); | |
203 | ||
57262b82 GKH |
204 | result = usb_submit_urb(priv->bulk_read_urb, GFP_KERNEL); |
205 | if (result) | |
206 | dev_err(&port->dev, | |
207 | "%s - failed resubmitting read urb, error %d\n", | |
208 | __func__, result); | |
309a0579 MJ |
209 | /* Request CTS line state, sometimes during opening the current |
210 | * CTS state can be missed. */ | |
211 | send_control_msg(port, RESEND_CTS_STATE, 1); | |
57262b82 GKH |
212 | return result; |
213 | } | |
214 | ||
335f8514 | 215 | static void opticon_close(struct usb_serial_port *port) |
57262b82 GKH |
216 | { |
217 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
218 | ||
219 | dbg("%s - port %d", __func__, port->number); | |
220 | ||
221 | /* shutdown our urbs */ | |
222 | usb_kill_urb(priv->bulk_read_urb); | |
223 | } | |
224 | ||
309a0579 | 225 | static void opticon_write_control_callback(struct urb *urb) |
648d4e16 GKH |
226 | { |
227 | struct opticon_private *priv = urb->context; | |
228 | int status = urb->status; | |
229 | unsigned long flags; | |
230 | ||
231 | /* free up the transfer buffer, as usb_free_urb() does not do this */ | |
232 | kfree(urb->transfer_buffer); | |
233 | ||
0d930e51 AZ |
234 | /* setup packet may be set if we're using it for writing */ |
235 | kfree(urb->setup_packet); | |
236 | ||
648d4e16 GKH |
237 | if (status) |
238 | dbg("%s - nonzero write bulk status received: %d", | |
239 | __func__, status); | |
240 | ||
241 | spin_lock_irqsave(&priv->lock, flags); | |
242 | --priv->outstanding_urbs; | |
243 | spin_unlock_irqrestore(&priv->lock, flags); | |
244 | ||
245 | usb_serial_port_softint(priv->port); | |
246 | } | |
247 | ||
248 | static int opticon_write(struct tty_struct *tty, struct usb_serial_port *port, | |
249 | const unsigned char *buf, int count) | |
250 | { | |
251 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
252 | struct usb_serial *serial = port->serial; | |
253 | struct urb *urb; | |
254 | unsigned char *buffer; | |
255 | unsigned long flags; | |
256 | int status; | |
309a0579 | 257 | struct usb_ctrlrequest *dr; |
648d4e16 GKH |
258 | |
259 | dbg("%s - port %d", __func__, port->number); | |
260 | ||
261 | spin_lock_irqsave(&priv->lock, flags); | |
262 | if (priv->outstanding_urbs > URB_UPPER_LIMIT) { | |
263 | spin_unlock_irqrestore(&priv->lock, flags); | |
759f3634 | 264 | dbg("%s - write limit hit", __func__); |
648d4e16 GKH |
265 | return 0; |
266 | } | |
267 | priv->outstanding_urbs++; | |
268 | spin_unlock_irqrestore(&priv->lock, flags); | |
269 | ||
270 | buffer = kmalloc(count, GFP_ATOMIC); | |
271 | if (!buffer) { | |
272 | dev_err(&port->dev, "out of memory\n"); | |
273 | count = -ENOMEM; | |
309a0579 | 274 | |
648d4e16 GKH |
275 | goto error_no_buffer; |
276 | } | |
277 | ||
278 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
279 | if (!urb) { | |
280 | dev_err(&port->dev, "no more free urbs\n"); | |
281 | count = -ENOMEM; | |
282 | goto error_no_urb; | |
283 | } | |
284 | ||
285 | memcpy(buffer, buf, count); | |
286 | ||
287 | usb_serial_debug_data(debug, &port->dev, __func__, count, buffer); | |
288 | ||
309a0579 MJ |
289 | /* The conncected devices do not have a bulk write endpoint, |
290 | * to transmit data to de barcode device the control endpoint is used */ | |
291 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_NOIO); | |
292 | if (!dr) | |
293 | return -ENOMEM; | |
294 | ||
295 | dr->bRequestType = USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT; | |
296 | dr->bRequest = 0x01; | |
297 | dr->wValue = 0; | |
298 | dr->wIndex = 0; | |
299 | dr->wLength = cpu_to_le16(count); | |
300 | ||
301 | usb_fill_control_urb(urb, serial->dev, | |
302 | usb_sndctrlpipe(serial->dev, 0), | |
303 | (unsigned char *)dr, buffer, count, | |
304 | opticon_write_control_callback, priv); | |
648d4e16 GKH |
305 | |
306 | /* send it down the pipe */ | |
307 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
308 | if (status) { | |
309 | dev_err(&port->dev, | |
309a0579 | 310 | "%s - usb_submit_urb(write endpoint) failed status = %d\n", |
648d4e16 GKH |
311 | __func__, status); |
312 | count = status; | |
313 | goto error; | |
314 | } | |
315 | ||
316 | /* we are done with this urb, so let the host driver | |
317 | * really free it when it is finished with it */ | |
318 | usb_free_urb(urb); | |
319 | ||
320 | return count; | |
321 | error: | |
322 | usb_free_urb(urb); | |
323 | error_no_urb: | |
324 | kfree(buffer); | |
325 | error_no_buffer: | |
326 | spin_lock_irqsave(&priv->lock, flags); | |
327 | --priv->outstanding_urbs; | |
328 | spin_unlock_irqrestore(&priv->lock, flags); | |
329 | return count; | |
330 | } | |
331 | ||
332 | static int opticon_write_room(struct tty_struct *tty) | |
333 | { | |
334 | struct usb_serial_port *port = tty->driver_data; | |
335 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
336 | unsigned long flags; | |
337 | ||
338 | dbg("%s - port %d", __func__, port->number); | |
339 | ||
340 | /* | |
341 | * We really can take almost anything the user throws at us | |
342 | * but let's pick a nice big number to tell the tty | |
343 | * layer that we have lots of free space, unless we don't. | |
344 | */ | |
345 | spin_lock_irqsave(&priv->lock, flags); | |
346 | if (priv->outstanding_urbs > URB_UPPER_LIMIT * 2 / 3) { | |
347 | spin_unlock_irqrestore(&priv->lock, flags); | |
759f3634 | 348 | dbg("%s - write limit hit", __func__); |
648d4e16 GKH |
349 | return 0; |
350 | } | |
351 | spin_unlock_irqrestore(&priv->lock, flags); | |
352 | ||
353 | return 2048; | |
354 | } | |
355 | ||
57262b82 GKH |
356 | static void opticon_throttle(struct tty_struct *tty) |
357 | { | |
358 | struct usb_serial_port *port = tty->driver_data; | |
359 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
360 | unsigned long flags; | |
361 | ||
362 | dbg("%s - port %d", __func__, port->number); | |
363 | spin_lock_irqsave(&priv->lock, flags); | |
364 | priv->throttled = true; | |
365 | spin_unlock_irqrestore(&priv->lock, flags); | |
366 | } | |
367 | ||
368 | ||
369 | static void opticon_unthrottle(struct tty_struct *tty) | |
370 | { | |
371 | struct usb_serial_port *port = tty->driver_data; | |
372 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
373 | unsigned long flags; | |
88fa6590 | 374 | int result, was_throttled; |
57262b82 GKH |
375 | |
376 | dbg("%s - port %d", __func__, port->number); | |
377 | ||
378 | spin_lock_irqsave(&priv->lock, flags); | |
379 | priv->throttled = false; | |
88fa6590 | 380 | was_throttled = priv->actually_throttled; |
57262b82 GKH |
381 | priv->actually_throttled = false; |
382 | spin_unlock_irqrestore(&priv->lock, flags); | |
383 | ||
384 | priv->bulk_read_urb->dev = port->serial->dev; | |
88fa6590 ON |
385 | if (was_throttled) { |
386 | result = usb_submit_urb(priv->bulk_read_urb, GFP_ATOMIC); | |
387 | if (result) | |
388 | dev_err(&port->dev, | |
389 | "%s - failed submitting read urb, error %d\n", | |
57262b82 | 390 | __func__, result); |
88fa6590 | 391 | } |
57262b82 GKH |
392 | } |
393 | ||
60b33c13 | 394 | static int opticon_tiocmget(struct tty_struct *tty) |
faac64ad GKH |
395 | { |
396 | struct usb_serial_port *port = tty->driver_data; | |
397 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
398 | unsigned long flags; | |
399 | int result = 0; | |
400 | ||
401 | dbg("%s - port %d", __func__, port->number); | |
309a0579 MJ |
402 | if (!usb_get_intfdata(port->serial->interface)) |
403 | return -ENODEV; | |
faac64ad GKH |
404 | |
405 | spin_lock_irqsave(&priv->lock, flags); | |
406 | if (priv->rts) | |
309a0579 MJ |
407 | result |= TIOCM_RTS; |
408 | if (priv->cts) | |
409 | result |= TIOCM_CTS; | |
faac64ad GKH |
410 | spin_unlock_irqrestore(&priv->lock, flags); |
411 | ||
412 | dbg("%s - %x", __func__, result); | |
413 | return result; | |
414 | } | |
415 | ||
309a0579 MJ |
416 | static int opticon_tiocmset(struct tty_struct *tty, struct file *file, |
417 | unsigned int set, unsigned int clear) | |
418 | { | |
419 | struct usb_serial_port *port = tty->driver_data; | |
420 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
421 | unsigned long flags; | |
422 | bool rts; | |
423 | bool changed = false; | |
424 | ||
425 | if (!usb_get_intfdata(port->serial->interface)) | |
426 | return -ENODEV; | |
427 | /* We only support RTS so we only handle that */ | |
428 | spin_lock_irqsave(&priv->lock, flags); | |
429 | ||
430 | rts = priv->rts; | |
431 | if (set & TIOCM_RTS) | |
432 | priv->rts = true; | |
433 | if (clear & TIOCM_RTS) | |
434 | priv->rts = false; | |
435 | changed = rts ^ priv->rts; | |
436 | spin_unlock_irqrestore(&priv->lock, flags); | |
437 | ||
438 | if (!changed) | |
439 | return 0; | |
440 | ||
441 | /* Send the new RTS state to the connected device */ | |
442 | return send_control_msg(port, CONTROL_RTS, !rts); | |
443 | } | |
444 | ||
faac64ad GKH |
445 | static int get_serial_info(struct opticon_private *priv, |
446 | struct serial_struct __user *serial) | |
447 | { | |
448 | struct serial_struct tmp; | |
449 | ||
450 | if (!serial) | |
451 | return -EFAULT; | |
452 | ||
453 | memset(&tmp, 0x00, sizeof(tmp)); | |
454 | ||
455 | /* fake emulate a 16550 uart to make userspace code happy */ | |
456 | tmp.type = PORT_16550A; | |
457 | tmp.line = priv->serial->minor; | |
458 | tmp.port = 0; | |
459 | tmp.irq = 0; | |
460 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
461 | tmp.xmit_fifo_size = 1024; | |
462 | tmp.baud_base = 9600; | |
463 | tmp.close_delay = 5*HZ; | |
464 | tmp.closing_wait = 30*HZ; | |
465 | ||
466 | if (copy_to_user(serial, &tmp, sizeof(*serial))) | |
467 | return -EFAULT; | |
468 | return 0; | |
469 | } | |
470 | ||
00a0d0d6 | 471 | static int opticon_ioctl(struct tty_struct *tty, |
faac64ad GKH |
472 | unsigned int cmd, unsigned long arg) |
473 | { | |
474 | struct usb_serial_port *port = tty->driver_data; | |
475 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
476 | ||
477 | dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd); | |
478 | ||
479 | switch (cmd) { | |
480 | case TIOCGSERIAL: | |
481 | return get_serial_info(priv, | |
482 | (struct serial_struct __user *)arg); | |
483 | } | |
484 | ||
485 | return -ENOIOCTLCMD; | |
486 | } | |
487 | ||
57262b82 GKH |
488 | static int opticon_startup(struct usb_serial *serial) |
489 | { | |
490 | struct opticon_private *priv; | |
491 | struct usb_host_interface *intf; | |
492 | int i; | |
493 | int retval = -ENOMEM; | |
494 | bool bulk_in_found = false; | |
495 | ||
496 | /* create our private serial structure */ | |
497 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
498 | if (priv == NULL) { | |
499 | dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__); | |
500 | return -ENOMEM; | |
501 | } | |
502 | spin_lock_init(&priv->lock); | |
503 | priv->serial = serial; | |
504 | priv->port = serial->port[0]; | |
505 | priv->udev = serial->dev; | |
309a0579 | 506 | priv->outstanding_urbs = 0; /* Init the outstanding urbs */ |
57262b82 GKH |
507 | |
508 | /* find our bulk endpoint */ | |
509 | intf = serial->interface->altsetting; | |
510 | for (i = 0; i < intf->desc.bNumEndpoints; ++i) { | |
511 | struct usb_endpoint_descriptor *endpoint; | |
512 | ||
513 | endpoint = &intf->endpoint[i].desc; | |
514 | if (!usb_endpoint_is_bulk_in(endpoint)) | |
515 | continue; | |
516 | ||
517 | priv->bulk_read_urb = usb_alloc_urb(0, GFP_KERNEL); | |
518 | if (!priv->bulk_read_urb) { | |
519 | dev_err(&priv->udev->dev, "out of memory\n"); | |
520 | goto error; | |
521 | } | |
522 | ||
523 | priv->buffer_size = le16_to_cpu(endpoint->wMaxPacketSize) * 2; | |
524 | priv->bulk_in_buffer = kmalloc(priv->buffer_size, GFP_KERNEL); | |
525 | if (!priv->bulk_in_buffer) { | |
526 | dev_err(&priv->udev->dev, "out of memory\n"); | |
527 | goto error; | |
528 | } | |
529 | ||
530 | priv->bulk_address = endpoint->bEndpointAddress; | |
531 | ||
57262b82 GKH |
532 | bulk_in_found = true; |
533 | break; | |
534 | } | |
535 | ||
536 | if (!bulk_in_found) { | |
537 | dev_err(&priv->udev->dev, | |
538 | "Error - the proper endpoints were not found!\n"); | |
539 | goto error; | |
540 | } | |
541 | ||
542 | usb_set_serial_data(serial, priv); | |
543 | return 0; | |
544 | ||
545 | error: | |
546 | usb_free_urb(priv->bulk_read_urb); | |
547 | kfree(priv->bulk_in_buffer); | |
548 | kfree(priv); | |
549 | return retval; | |
550 | } | |
551 | ||
f9c99bb8 | 552 | static void opticon_disconnect(struct usb_serial *serial) |
57262b82 GKH |
553 | { |
554 | struct opticon_private *priv = usb_get_serial_data(serial); | |
555 | ||
556 | dbg("%s", __func__); | |
557 | ||
558 | usb_kill_urb(priv->bulk_read_urb); | |
559 | usb_free_urb(priv->bulk_read_urb); | |
f9c99bb8 AS |
560 | } |
561 | ||
562 | static void opticon_release(struct usb_serial *serial) | |
563 | { | |
564 | struct opticon_private *priv = usb_get_serial_data(serial); | |
565 | ||
566 | dbg("%s", __func__); | |
567 | ||
57262b82 GKH |
568 | kfree(priv->bulk_in_buffer); |
569 | kfree(priv); | |
57262b82 GKH |
570 | } |
571 | ||
d1c0713d ON |
572 | static int opticon_suspend(struct usb_interface *intf, pm_message_t message) |
573 | { | |
574 | struct usb_serial *serial = usb_get_intfdata(intf); | |
575 | struct opticon_private *priv = usb_get_serial_data(serial); | |
576 | ||
577 | usb_kill_urb(priv->bulk_read_urb); | |
578 | return 0; | |
579 | } | |
580 | ||
581 | static int opticon_resume(struct usb_interface *intf) | |
582 | { | |
583 | struct usb_serial *serial = usb_get_intfdata(intf); | |
584 | struct opticon_private *priv = usb_get_serial_data(serial); | |
585 | struct usb_serial_port *port = serial->port[0]; | |
586 | int result; | |
587 | ||
82fc5943 | 588 | mutex_lock(&port->port.mutex); |
2a0785ea AC |
589 | /* This is protected by the port mutex against close/open */ |
590 | if (test_bit(ASYNCB_INITIALIZED, &port->port.flags)) | |
d1c0713d ON |
591 | result = usb_submit_urb(priv->bulk_read_urb, GFP_NOIO); |
592 | else | |
593 | result = 0; | |
82fc5943 | 594 | mutex_unlock(&port->port.mutex); |
d1c0713d ON |
595 | return result; |
596 | } | |
57262b82 GKH |
597 | |
598 | static struct usb_driver opticon_driver = { | |
599 | .name = "opticon", | |
600 | .probe = usb_serial_probe, | |
601 | .disconnect = usb_serial_disconnect, | |
d1c0713d ON |
602 | .suspend = opticon_suspend, |
603 | .resume = opticon_resume, | |
57262b82 GKH |
604 | .id_table = id_table, |
605 | .no_dynamic_id = 1, | |
606 | }; | |
607 | ||
608 | static struct usb_serial_driver opticon_device = { | |
609 | .driver = { | |
610 | .owner = THIS_MODULE, | |
611 | .name = "opticon", | |
612 | }, | |
613 | .id_table = id_table, | |
614 | .usb_driver = &opticon_driver, | |
615 | .num_ports = 1, | |
616 | .attach = opticon_startup, | |
617 | .open = opticon_open, | |
618 | .close = opticon_close, | |
648d4e16 GKH |
619 | .write = opticon_write, |
620 | .write_room = opticon_write_room, | |
f9c99bb8 AS |
621 | .disconnect = opticon_disconnect, |
622 | .release = opticon_release, | |
57262b82 GKH |
623 | .throttle = opticon_throttle, |
624 | .unthrottle = opticon_unthrottle, | |
faac64ad GKH |
625 | .ioctl = opticon_ioctl, |
626 | .tiocmget = opticon_tiocmget, | |
309a0579 | 627 | .tiocmset = opticon_tiocmset, |
57262b82 GKH |
628 | }; |
629 | ||
630 | static int __init opticon_init(void) | |
631 | { | |
632 | int retval; | |
633 | ||
634 | retval = usb_serial_register(&opticon_device); | |
635 | if (retval) | |
636 | return retval; | |
637 | retval = usb_register(&opticon_driver); | |
638 | if (retval) | |
639 | usb_serial_deregister(&opticon_device); | |
640 | return retval; | |
641 | } | |
642 | ||
643 | static void __exit opticon_exit(void) | |
644 | { | |
645 | usb_deregister(&opticon_driver); | |
646 | usb_serial_deregister(&opticon_device); | |
647 | } | |
648 | ||
649 | module_init(opticon_init); | |
650 | module_exit(opticon_exit); | |
309a0579 | 651 | MODULE_DESCRIPTION(DRIVER_DESC); |
57262b82 GKH |
652 | MODULE_LICENSE("GPL"); |
653 | ||
654 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
655 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |