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 | ||
90ab5ee9 | 35 | static bool debug; |
57262b82 | 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 | 72 | |
57262b82 GKH |
73 | switch (status) { |
74 | case 0: | |
75 | /* success */ | |
76 | break; | |
77 | case -ECONNRESET: | |
78 | case -ENOENT: | |
79 | case -ESHUTDOWN: | |
80 | /* this urb is terminated, clean up */ | |
d44d9ab7 GKH |
81 | dev_dbg(&priv->udev->dev, "%s - urb shutting down with status: %d\n", |
82 | __func__, status); | |
57262b82 GKH |
83 | return; |
84 | default: | |
d44d9ab7 GKH |
85 | dev_dbg(&priv->udev->dev, "%s - nonzero urb status received: %d\n", |
86 | __func__, status); | |
57262b82 GKH |
87 | goto exit; |
88 | } | |
89 | ||
59d33f2f | 90 | usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data); |
57262b82 GKH |
91 | |
92 | if (urb->actual_length > 2) { | |
93 | data_length = urb->actual_length - 2; | |
94 | ||
95 | /* | |
96 | * Data from the device comes with a 2 byte header: | |
97 | * | |
98 | * <0x00><0x00>data... | |
309a0579 | 99 | * This is real data to be sent to the tty layer |
57262b82 | 100 | * <0x00><0x01)level |
309a0579 MJ |
101 | * This is a CTS level change, the third byte is the CTS |
102 | * value (0 for low, 1 for high). | |
57262b82 GKH |
103 | */ |
104 | if ((data[0] == 0x00) && (data[1] == 0x00)) { | |
105 | /* real data, send it to the tty layer */ | |
106 | tty = tty_port_tty_get(&port->port); | |
107 | if (tty) { | |
97cd8dc4 AZ |
108 | tty_insert_flip_string(tty, data + 2, |
109 | data_length); | |
a108bfcb | 110 | tty_flip_buffer_push(tty); |
57262b82 GKH |
111 | tty_kref_put(tty); |
112 | } | |
113 | } else { | |
114 | if ((data[0] == 0x00) && (data[1] == 0x01)) { | |
309a0579 | 115 | spin_lock_irqsave(&priv->lock, flags); |
25985edc | 116 | /* CTS status information package */ |
57262b82 | 117 | if (data[2] == 0x00) |
309a0579 | 118 | priv->cts = false; |
57262b82 | 119 | else |
309a0579 MJ |
120 | priv->cts = true; |
121 | spin_unlock_irqrestore(&priv->lock, flags); | |
57262b82 | 122 | } else { |
c6f694af AZ |
123 | dev_dbg(&priv->udev->dev, |
124 | "Unknown data packet received from the device:" | |
125 | " %2x %2x\n", | |
126 | data[0], data[1]); | |
57262b82 GKH |
127 | } |
128 | } | |
129 | } else { | |
130 | dev_dbg(&priv->udev->dev, | |
9ddc5b6f | 131 | "Improper amount of data received from the device, " |
57262b82 GKH |
132 | "%d bytes", urb->actual_length); |
133 | } | |
134 | ||
135 | exit: | |
136 | spin_lock(&priv->lock); | |
137 | ||
138 | /* Continue trying to always read if we should */ | |
139 | if (!priv->throttled) { | |
140 | usb_fill_bulk_urb(priv->bulk_read_urb, priv->udev, | |
141 | usb_rcvbulkpipe(priv->udev, | |
142 | priv->bulk_address), | |
143 | priv->bulk_in_buffer, priv->buffer_size, | |
309a0579 | 144 | opticon_read_bulk_callback, priv); |
97cd8dc4 | 145 | result = usb_submit_urb(priv->bulk_read_urb, GFP_ATOMIC); |
57262b82 GKH |
146 | if (result) |
147 | dev_err(&port->dev, | |
148 | "%s - failed resubmitting read urb, error %d\n", | |
149 | __func__, result); | |
150 | } else | |
151 | priv->actually_throttled = true; | |
152 | spin_unlock(&priv->lock); | |
153 | } | |
154 | ||
309a0579 MJ |
155 | static int send_control_msg(struct usb_serial_port *port, u8 requesttype, |
156 | u8 val) | |
157 | { | |
158 | struct usb_serial *serial = port->serial; | |
159 | int retval; | |
160 | u8 buffer[2]; | |
161 | ||
162 | buffer[0] = val; | |
163 | /* Send the message to the vendor control endpoint | |
164 | * of the connected device */ | |
165 | retval = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), | |
166 | requesttype, | |
167 | USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE, | |
168 | 0, 0, buffer, 1, 0); | |
169 | ||
170 | return retval; | |
171 | } | |
172 | ||
a509a7e4 | 173 | static int opticon_open(struct tty_struct *tty, struct usb_serial_port *port) |
57262b82 GKH |
174 | { |
175 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
176 | unsigned long flags; | |
177 | int result = 0; | |
178 | ||
57262b82 GKH |
179 | spin_lock_irqsave(&priv->lock, flags); |
180 | priv->throttled = false; | |
181 | priv->actually_throttled = false; | |
182 | priv->port = port; | |
309a0579 | 183 | priv->rts = false; |
57262b82 GKH |
184 | spin_unlock_irqrestore(&priv->lock, flags); |
185 | ||
309a0579 MJ |
186 | /* Clear RTS line */ |
187 | send_control_msg(port, CONTROL_RTS, 0); | |
188 | ||
189 | /* Setup the read URB and start reading from the device */ | |
57262b82 GKH |
190 | usb_fill_bulk_urb(priv->bulk_read_urb, priv->udev, |
191 | usb_rcvbulkpipe(priv->udev, | |
192 | priv->bulk_address), | |
193 | priv->bulk_in_buffer, priv->buffer_size, | |
309a0579 MJ |
194 | opticon_read_bulk_callback, priv); |
195 | ||
196 | /* clear the halt status of the enpoint */ | |
197 | usb_clear_halt(priv->udev, priv->bulk_read_urb->pipe); | |
198 | ||
57262b82 GKH |
199 | result = usb_submit_urb(priv->bulk_read_urb, GFP_KERNEL); |
200 | if (result) | |
201 | dev_err(&port->dev, | |
202 | "%s - failed resubmitting read urb, error %d\n", | |
203 | __func__, result); | |
309a0579 MJ |
204 | /* Request CTS line state, sometimes during opening the current |
205 | * CTS state can be missed. */ | |
206 | send_control_msg(port, RESEND_CTS_STATE, 1); | |
57262b82 GKH |
207 | return result; |
208 | } | |
209 | ||
335f8514 | 210 | static void opticon_close(struct usb_serial_port *port) |
57262b82 GKH |
211 | { |
212 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
213 | ||
57262b82 GKH |
214 | /* shutdown our urbs */ |
215 | usb_kill_urb(priv->bulk_read_urb); | |
216 | } | |
217 | ||
309a0579 | 218 | static void opticon_write_control_callback(struct urb *urb) |
648d4e16 GKH |
219 | { |
220 | struct opticon_private *priv = urb->context; | |
221 | int status = urb->status; | |
222 | unsigned long flags; | |
223 | ||
224 | /* free up the transfer buffer, as usb_free_urb() does not do this */ | |
225 | kfree(urb->transfer_buffer); | |
226 | ||
0d930e51 AZ |
227 | /* setup packet may be set if we're using it for writing */ |
228 | kfree(urb->setup_packet); | |
229 | ||
648d4e16 | 230 | if (status) |
d44d9ab7 GKH |
231 | dev_dbg(&priv->udev->dev, "%s - nonzero write bulk status received: %d\n", |
232 | __func__, status); | |
648d4e16 GKH |
233 | |
234 | spin_lock_irqsave(&priv->lock, flags); | |
235 | --priv->outstanding_urbs; | |
236 | spin_unlock_irqrestore(&priv->lock, flags); | |
237 | ||
238 | usb_serial_port_softint(priv->port); | |
239 | } | |
240 | ||
241 | static int opticon_write(struct tty_struct *tty, struct usb_serial_port *port, | |
242 | const unsigned char *buf, int count) | |
243 | { | |
244 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
245 | struct usb_serial *serial = port->serial; | |
246 | struct urb *urb; | |
247 | unsigned char *buffer; | |
248 | unsigned long flags; | |
249 | int status; | |
309a0579 | 250 | struct usb_ctrlrequest *dr; |
648d4e16 | 251 | |
648d4e16 GKH |
252 | spin_lock_irqsave(&priv->lock, flags); |
253 | if (priv->outstanding_urbs > URB_UPPER_LIMIT) { | |
254 | spin_unlock_irqrestore(&priv->lock, flags); | |
d44d9ab7 | 255 | dev_dbg(&port->dev, "%s - write limit hit\n", __func__); |
648d4e16 GKH |
256 | return 0; |
257 | } | |
258 | priv->outstanding_urbs++; | |
259 | spin_unlock_irqrestore(&priv->lock, flags); | |
260 | ||
261 | buffer = kmalloc(count, GFP_ATOMIC); | |
262 | if (!buffer) { | |
263 | dev_err(&port->dev, "out of memory\n"); | |
264 | count = -ENOMEM; | |
309a0579 | 265 | |
648d4e16 GKH |
266 | goto error_no_buffer; |
267 | } | |
268 | ||
269 | urb = usb_alloc_urb(0, GFP_ATOMIC); | |
270 | if (!urb) { | |
271 | dev_err(&port->dev, "no more free urbs\n"); | |
272 | count = -ENOMEM; | |
273 | goto error_no_urb; | |
274 | } | |
275 | ||
276 | memcpy(buffer, buf, count); | |
277 | ||
59d33f2f | 278 | usb_serial_debug_data(&port->dev, __func__, count, buffer); |
648d4e16 | 279 | |
309a0579 MJ |
280 | /* The conncected devices do not have a bulk write endpoint, |
281 | * to transmit data to de barcode device the control endpoint is used */ | |
282 | dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_NOIO); | |
b0795bbf JL |
283 | if (!dr) { |
284 | dev_err(&port->dev, "out of memory\n"); | |
285 | count = -ENOMEM; | |
286 | goto error; | |
287 | } | |
309a0579 MJ |
288 | |
289 | dr->bRequestType = USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT; | |
290 | dr->bRequest = 0x01; | |
291 | dr->wValue = 0; | |
292 | dr->wIndex = 0; | |
293 | dr->wLength = cpu_to_le16(count); | |
294 | ||
295 | usb_fill_control_urb(urb, serial->dev, | |
296 | usb_sndctrlpipe(serial->dev, 0), | |
297 | (unsigned char *)dr, buffer, count, | |
298 | opticon_write_control_callback, priv); | |
648d4e16 GKH |
299 | |
300 | /* send it down the pipe */ | |
301 | status = usb_submit_urb(urb, GFP_ATOMIC); | |
302 | if (status) { | |
303 | dev_err(&port->dev, | |
309a0579 | 304 | "%s - usb_submit_urb(write endpoint) failed status = %d\n", |
648d4e16 GKH |
305 | __func__, status); |
306 | count = status; | |
307 | goto error; | |
308 | } | |
309 | ||
310 | /* we are done with this urb, so let the host driver | |
311 | * really free it when it is finished with it */ | |
312 | usb_free_urb(urb); | |
313 | ||
314 | return count; | |
315 | error: | |
316 | usb_free_urb(urb); | |
317 | error_no_urb: | |
318 | kfree(buffer); | |
319 | error_no_buffer: | |
320 | spin_lock_irqsave(&priv->lock, flags); | |
321 | --priv->outstanding_urbs; | |
322 | spin_unlock_irqrestore(&priv->lock, flags); | |
323 | return count; | |
324 | } | |
325 | ||
326 | static int opticon_write_room(struct tty_struct *tty) | |
327 | { | |
328 | struct usb_serial_port *port = tty->driver_data; | |
329 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
330 | unsigned long flags; | |
331 | ||
648d4e16 GKH |
332 | /* |
333 | * We really can take almost anything the user throws at us | |
334 | * but let's pick a nice big number to tell the tty | |
335 | * layer that we have lots of free space, unless we don't. | |
336 | */ | |
337 | spin_lock_irqsave(&priv->lock, flags); | |
338 | if (priv->outstanding_urbs > URB_UPPER_LIMIT * 2 / 3) { | |
339 | spin_unlock_irqrestore(&priv->lock, flags); | |
d44d9ab7 | 340 | dev_dbg(&port->dev, "%s - write limit hit\n", __func__); |
648d4e16 GKH |
341 | return 0; |
342 | } | |
343 | spin_unlock_irqrestore(&priv->lock, flags); | |
344 | ||
345 | return 2048; | |
346 | } | |
347 | ||
57262b82 GKH |
348 | static void opticon_throttle(struct tty_struct *tty) |
349 | { | |
350 | struct usb_serial_port *port = tty->driver_data; | |
351 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
352 | unsigned long flags; | |
353 | ||
57262b82 GKH |
354 | spin_lock_irqsave(&priv->lock, flags); |
355 | priv->throttled = true; | |
356 | spin_unlock_irqrestore(&priv->lock, flags); | |
357 | } | |
358 | ||
359 | ||
360 | static void opticon_unthrottle(struct tty_struct *tty) | |
361 | { | |
362 | struct usb_serial_port *port = tty->driver_data; | |
363 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
364 | unsigned long flags; | |
88fa6590 | 365 | int result, was_throttled; |
57262b82 | 366 | |
57262b82 GKH |
367 | spin_lock_irqsave(&priv->lock, flags); |
368 | priv->throttled = false; | |
88fa6590 | 369 | was_throttled = priv->actually_throttled; |
57262b82 GKH |
370 | priv->actually_throttled = false; |
371 | spin_unlock_irqrestore(&priv->lock, flags); | |
372 | ||
88fa6590 ON |
373 | if (was_throttled) { |
374 | result = usb_submit_urb(priv->bulk_read_urb, GFP_ATOMIC); | |
375 | if (result) | |
376 | dev_err(&port->dev, | |
377 | "%s - failed submitting read urb, error %d\n", | |
57262b82 | 378 | __func__, result); |
88fa6590 | 379 | } |
57262b82 GKH |
380 | } |
381 | ||
60b33c13 | 382 | static int opticon_tiocmget(struct tty_struct *tty) |
faac64ad GKH |
383 | { |
384 | struct usb_serial_port *port = tty->driver_data; | |
385 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
386 | unsigned long flags; | |
387 | int result = 0; | |
388 | ||
faac64ad GKH |
389 | spin_lock_irqsave(&priv->lock, flags); |
390 | if (priv->rts) | |
309a0579 MJ |
391 | result |= TIOCM_RTS; |
392 | if (priv->cts) | |
393 | result |= TIOCM_CTS; | |
faac64ad GKH |
394 | spin_unlock_irqrestore(&priv->lock, flags); |
395 | ||
d44d9ab7 | 396 | dev_dbg(&port->dev, "%s - %x\n", __func__, result); |
faac64ad GKH |
397 | return result; |
398 | } | |
399 | ||
4acfaf82 | 400 | static int opticon_tiocmset(struct tty_struct *tty, |
309a0579 MJ |
401 | unsigned int set, unsigned int clear) |
402 | { | |
403 | struct usb_serial_port *port = tty->driver_data; | |
81d5a672 | 404 | struct usb_serial *serial = port->serial; |
309a0579 MJ |
405 | struct opticon_private *priv = usb_get_serial_data(port->serial); |
406 | unsigned long flags; | |
407 | bool rts; | |
408 | bool changed = false; | |
81d5a672 | 409 | int ret; |
309a0579 | 410 | |
309a0579 MJ |
411 | /* We only support RTS so we only handle that */ |
412 | spin_lock_irqsave(&priv->lock, flags); | |
413 | ||
414 | rts = priv->rts; | |
415 | if (set & TIOCM_RTS) | |
416 | priv->rts = true; | |
417 | if (clear & TIOCM_RTS) | |
418 | priv->rts = false; | |
419 | changed = rts ^ priv->rts; | |
420 | spin_unlock_irqrestore(&priv->lock, flags); | |
421 | ||
422 | if (!changed) | |
423 | return 0; | |
424 | ||
425 | /* Send the new RTS state to the connected device */ | |
81d5a672 JH |
426 | mutex_lock(&serial->disc_mutex); |
427 | if (!serial->disconnected) | |
428 | ret = send_control_msg(port, CONTROL_RTS, !rts); | |
429 | else | |
430 | ret = -ENODEV; | |
431 | mutex_unlock(&serial->disc_mutex); | |
432 | ||
433 | return ret; | |
309a0579 MJ |
434 | } |
435 | ||
faac64ad GKH |
436 | static int get_serial_info(struct opticon_private *priv, |
437 | struct serial_struct __user *serial) | |
438 | { | |
439 | struct serial_struct tmp; | |
440 | ||
441 | if (!serial) | |
442 | return -EFAULT; | |
443 | ||
444 | memset(&tmp, 0x00, sizeof(tmp)); | |
445 | ||
446 | /* fake emulate a 16550 uart to make userspace code happy */ | |
447 | tmp.type = PORT_16550A; | |
448 | tmp.line = priv->serial->minor; | |
449 | tmp.port = 0; | |
450 | tmp.irq = 0; | |
451 | tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ; | |
452 | tmp.xmit_fifo_size = 1024; | |
453 | tmp.baud_base = 9600; | |
454 | tmp.close_delay = 5*HZ; | |
455 | tmp.closing_wait = 30*HZ; | |
456 | ||
457 | if (copy_to_user(serial, &tmp, sizeof(*serial))) | |
458 | return -EFAULT; | |
459 | return 0; | |
460 | } | |
461 | ||
00a0d0d6 | 462 | static int opticon_ioctl(struct tty_struct *tty, |
faac64ad GKH |
463 | unsigned int cmd, unsigned long arg) |
464 | { | |
465 | struct usb_serial_port *port = tty->driver_data; | |
466 | struct opticon_private *priv = usb_get_serial_data(port->serial); | |
467 | ||
d44d9ab7 | 468 | dev_dbg(&port->dev, "%s - port %d, cmd = 0x%x\n", __func__, port->number, cmd); |
faac64ad GKH |
469 | |
470 | switch (cmd) { | |
471 | case TIOCGSERIAL: | |
472 | return get_serial_info(priv, | |
473 | (struct serial_struct __user *)arg); | |
474 | } | |
475 | ||
476 | return -ENOIOCTLCMD; | |
477 | } | |
478 | ||
57262b82 GKH |
479 | static int opticon_startup(struct usb_serial *serial) |
480 | { | |
481 | struct opticon_private *priv; | |
482 | struct usb_host_interface *intf; | |
483 | int i; | |
484 | int retval = -ENOMEM; | |
485 | bool bulk_in_found = false; | |
486 | ||
487 | /* create our private serial structure */ | |
488 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); | |
489 | if (priv == NULL) { | |
490 | dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__); | |
491 | return -ENOMEM; | |
492 | } | |
493 | spin_lock_init(&priv->lock); | |
494 | priv->serial = serial; | |
495 | priv->port = serial->port[0]; | |
496 | priv->udev = serial->dev; | |
309a0579 | 497 | priv->outstanding_urbs = 0; /* Init the outstanding urbs */ |
57262b82 GKH |
498 | |
499 | /* find our bulk endpoint */ | |
500 | intf = serial->interface->altsetting; | |
501 | for (i = 0; i < intf->desc.bNumEndpoints; ++i) { | |
502 | struct usb_endpoint_descriptor *endpoint; | |
503 | ||
504 | endpoint = &intf->endpoint[i].desc; | |
505 | if (!usb_endpoint_is_bulk_in(endpoint)) | |
506 | continue; | |
507 | ||
508 | priv->bulk_read_urb = usb_alloc_urb(0, GFP_KERNEL); | |
509 | if (!priv->bulk_read_urb) { | |
510 | dev_err(&priv->udev->dev, "out of memory\n"); | |
511 | goto error; | |
512 | } | |
513 | ||
29cc8897 | 514 | priv->buffer_size = usb_endpoint_maxp(endpoint) * 2; |
57262b82 GKH |
515 | priv->bulk_in_buffer = kmalloc(priv->buffer_size, GFP_KERNEL); |
516 | if (!priv->bulk_in_buffer) { | |
517 | dev_err(&priv->udev->dev, "out of memory\n"); | |
518 | goto error; | |
519 | } | |
520 | ||
521 | priv->bulk_address = endpoint->bEndpointAddress; | |
522 | ||
57262b82 GKH |
523 | bulk_in_found = true; |
524 | break; | |
525 | } | |
526 | ||
527 | if (!bulk_in_found) { | |
528 | dev_err(&priv->udev->dev, | |
529 | "Error - the proper endpoints were not found!\n"); | |
530 | goto error; | |
531 | } | |
532 | ||
533 | usb_set_serial_data(serial, priv); | |
534 | return 0; | |
535 | ||
536 | error: | |
537 | usb_free_urb(priv->bulk_read_urb); | |
538 | kfree(priv->bulk_in_buffer); | |
539 | kfree(priv); | |
540 | return retval; | |
541 | } | |
542 | ||
f9c99bb8 | 543 | static void opticon_disconnect(struct usb_serial *serial) |
57262b82 GKH |
544 | { |
545 | struct opticon_private *priv = usb_get_serial_data(serial); | |
546 | ||
57262b82 GKH |
547 | usb_kill_urb(priv->bulk_read_urb); |
548 | usb_free_urb(priv->bulk_read_urb); | |
f9c99bb8 AS |
549 | } |
550 | ||
551 | static void opticon_release(struct usb_serial *serial) | |
552 | { | |
553 | struct opticon_private *priv = usb_get_serial_data(serial); | |
554 | ||
57262b82 GKH |
555 | kfree(priv->bulk_in_buffer); |
556 | kfree(priv); | |
57262b82 GKH |
557 | } |
558 | ||
d530296f | 559 | static int opticon_suspend(struct usb_serial *serial, pm_message_t message) |
d1c0713d | 560 | { |
d1c0713d ON |
561 | struct opticon_private *priv = usb_get_serial_data(serial); |
562 | ||
563 | usb_kill_urb(priv->bulk_read_urb); | |
564 | return 0; | |
565 | } | |
566 | ||
d530296f | 567 | static int opticon_resume(struct usb_serial *serial) |
d1c0713d | 568 | { |
d1c0713d ON |
569 | struct opticon_private *priv = usb_get_serial_data(serial); |
570 | struct usb_serial_port *port = serial->port[0]; | |
571 | int result; | |
572 | ||
82fc5943 | 573 | mutex_lock(&port->port.mutex); |
2a0785ea AC |
574 | /* This is protected by the port mutex against close/open */ |
575 | if (test_bit(ASYNCB_INITIALIZED, &port->port.flags)) | |
d1c0713d ON |
576 | result = usb_submit_urb(priv->bulk_read_urb, GFP_NOIO); |
577 | else | |
578 | result = 0; | |
82fc5943 | 579 | mutex_unlock(&port->port.mutex); |
d1c0713d ON |
580 | return result; |
581 | } | |
57262b82 | 582 | |
57262b82 GKH |
583 | static struct usb_serial_driver opticon_device = { |
584 | .driver = { | |
585 | .owner = THIS_MODULE, | |
586 | .name = "opticon", | |
587 | }, | |
588 | .id_table = id_table, | |
57262b82 GKH |
589 | .num_ports = 1, |
590 | .attach = opticon_startup, | |
591 | .open = opticon_open, | |
592 | .close = opticon_close, | |
648d4e16 GKH |
593 | .write = opticon_write, |
594 | .write_room = opticon_write_room, | |
f9c99bb8 AS |
595 | .disconnect = opticon_disconnect, |
596 | .release = opticon_release, | |
57262b82 GKH |
597 | .throttle = opticon_throttle, |
598 | .unthrottle = opticon_unthrottle, | |
faac64ad GKH |
599 | .ioctl = opticon_ioctl, |
600 | .tiocmget = opticon_tiocmget, | |
309a0579 | 601 | .tiocmset = opticon_tiocmset, |
d530296f GKH |
602 | .suspend = opticon_suspend, |
603 | .resume = opticon_resume, | |
57262b82 GKH |
604 | }; |
605 | ||
f667ddad AS |
606 | static struct usb_serial_driver * const serial_drivers[] = { |
607 | &opticon_device, NULL | |
608 | }; | |
609 | ||
68e24113 | 610 | module_usb_serial_driver(serial_drivers, id_table); |
57262b82 | 611 | |
309a0579 | 612 | MODULE_DESCRIPTION(DRIVER_DESC); |
57262b82 GKH |
613 | MODULE_LICENSE("GPL"); |
614 | ||
615 | module_param(debug, bool, S_IRUGO | S_IWUSR); | |
616 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |