blob: 02cb1b7f6559b096d310a3a558d3e62b7752e422 [file] [log] [blame]
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -08001/*
2 * Opticon USB barcode to serial driver
3 *
Martin Jansen309a0572011-02-24 14:50:16 +01004 * Copyright (C) 2011 Martin Jansen <martin.jansen@opticon.com>
Greg Kroah-Hartman648d4e12009-02-06 18:30:56 -08005 * Copyright (C) 2008 - 2009 Greg Kroah-Hartman <gregkh@suse.de>
6 * Copyright (C) 2008 - 2009 Novell Inc.
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -08007 *
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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090017#include <linux/slab.h>
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -080018#include <linux/tty_flip.h>
Greg Kroah-Hartmanfaac64a2009-02-06 18:31:46 -080019#include <linux/serial.h>
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -080020#include <linux/module.h>
21#include <linux/usb.h>
22#include <linux/usb/serial.h>
23#include <linux/uaccess.h>
24
Martin Jansen309a0572011-02-24 14:50:16 +010025#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
Rusty Russell90ab5ee2012-01-13 09:32:20 +103035static bool debug;
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -080036
Németh Márton7d40d7e2010-01-10 15:34:24 +010037static const struct usb_device_id id_table[] = {
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -080038 { USB_DEVICE(0x065a, 0x0009) },
39 { },
40};
41MODULE_DEVICE_TABLE(usb, id_table);
42
43/* This structure holds all of the individual device information */
44struct 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;
Martin Jansen309a0572011-02-24 14:50:16 +010056 bool cts;
Greg Kroah-Hartman648d4e12009-02-06 18:30:56 -080057 int outstanding_urbs;
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -080058};
59
Greg Kroah-Hartman648d4e12009-02-06 18:30:56 -080060
Martin Jansen309a0572011-02-24 14:50:16 +010061
62static void opticon_read_bulk_callback(struct urb *urb)
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -080063{
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;
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -080070 int data_length;
Martin Jansen309a0572011-02-24 14:50:16 +010071 unsigned long flags;
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -080072
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -080073 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 */
81 dbg("%s - urb shutting down with status: %d",
82 __func__, status);
83 return;
84 default:
85 dbg("%s - nonzero urb status received: %d",
86 __func__, status);
87 goto exit;
88 }
89
90 usb_serial_debug_data(debug, &port->dev, __func__, urb->actual_length,
91 data);
92
93 if (urb->actual_length > 2) {
94 data_length = urb->actual_length - 2;
95
96 /*
97 * Data from the device comes with a 2 byte header:
98 *
99 * <0x00><0x00>data...
Martin Jansen309a0572011-02-24 14:50:16 +0100100 * This is real data to be sent to the tty layer
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800101 * <0x00><0x01)level
Martin Jansen309a0572011-02-24 14:50:16 +0100102 * This is a CTS level change, the third byte is the CTS
103 * value (0 for low, 1 for high).
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800104 */
105 if ((data[0] == 0x00) && (data[1] == 0x00)) {
106 /* real data, send it to the tty layer */
107 tty = tty_port_tty_get(&port->port);
108 if (tty) {
Alon Ziv97cd8dc2010-10-10 08:32:18 +0200109 tty_insert_flip_string(tty, data + 2,
110 data_length);
Alan Coxa108bfc2010-02-18 16:44:01 +0000111 tty_flip_buffer_push(tty);
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800112 tty_kref_put(tty);
113 }
114 } else {
115 if ((data[0] == 0x00) && (data[1] == 0x01)) {
Martin Jansen309a0572011-02-24 14:50:16 +0100116 spin_lock_irqsave(&priv->lock, flags);
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300117 /* CTS status information package */
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800118 if (data[2] == 0x00)
Martin Jansen309a0572011-02-24 14:50:16 +0100119 priv->cts = false;
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800120 else
Martin Jansen309a0572011-02-24 14:50:16 +0100121 priv->cts = true;
122 spin_unlock_irqrestore(&priv->lock, flags);
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800123 } else {
Alon Zivc6f694a2010-10-10 08:32:20 +0200124 dev_dbg(&priv->udev->dev,
125 "Unknown data packet received from the device:"
126 " %2x %2x\n",
127 data[0], data[1]);
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800128 }
129 }
130 } else {
131 dev_dbg(&priv->udev->dev,
Uwe Kleine-König9ddc5b62010-01-20 17:02:24 +0100132 "Improper amount of data received from the device, "
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800133 "%d bytes", urb->actual_length);
134 }
135
136exit:
137 spin_lock(&priv->lock);
138
139 /* Continue trying to always read if we should */
140 if (!priv->throttled) {
141 usb_fill_bulk_urb(priv->bulk_read_urb, priv->udev,
142 usb_rcvbulkpipe(priv->udev,
143 priv->bulk_address),
144 priv->bulk_in_buffer, priv->buffer_size,
Martin Jansen309a0572011-02-24 14:50:16 +0100145 opticon_read_bulk_callback, priv);
Alon Ziv97cd8dc2010-10-10 08:32:18 +0200146 result = usb_submit_urb(priv->bulk_read_urb, GFP_ATOMIC);
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800147 if (result)
148 dev_err(&port->dev,
149 "%s - failed resubmitting read urb, error %d\n",
150 __func__, result);
151 } else
152 priv->actually_throttled = true;
153 spin_unlock(&priv->lock);
154}
155
Martin Jansen309a0572011-02-24 14:50:16 +0100156static int send_control_msg(struct usb_serial_port *port, u8 requesttype,
157 u8 val)
158{
159 struct usb_serial *serial = port->serial;
160 int retval;
161 u8 buffer[2];
162
163 buffer[0] = val;
164 /* Send the message to the vendor control endpoint
165 * of the connected device */
166 retval = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
167 requesttype,
168 USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
169 0, 0, buffer, 1, 0);
170
171 return retval;
172}
173
Alan Coxa509a7e2009-09-19 13:13:26 -0700174static int opticon_open(struct tty_struct *tty, struct usb_serial_port *port)
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800175{
176 struct opticon_private *priv = usb_get_serial_data(port->serial);
177 unsigned long flags;
178 int result = 0;
179
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800180 spin_lock_irqsave(&priv->lock, flags);
181 priv->throttled = false;
182 priv->actually_throttled = false;
183 priv->port = port;
Martin Jansen309a0572011-02-24 14:50:16 +0100184 priv->rts = false;
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800185 spin_unlock_irqrestore(&priv->lock, flags);
186
Martin Jansen309a0572011-02-24 14:50:16 +0100187 /* Clear RTS line */
188 send_control_msg(port, CONTROL_RTS, 0);
189
190 /* Setup the read URB and start reading from the device */
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800191 usb_fill_bulk_urb(priv->bulk_read_urb, priv->udev,
192 usb_rcvbulkpipe(priv->udev,
193 priv->bulk_address),
194 priv->bulk_in_buffer, priv->buffer_size,
Martin Jansen309a0572011-02-24 14:50:16 +0100195 opticon_read_bulk_callback, priv);
196
197 /* clear the halt status of the enpoint */
198 usb_clear_halt(priv->udev, priv->bulk_read_urb->pipe);
199
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800200 result = usb_submit_urb(priv->bulk_read_urb, GFP_KERNEL);
201 if (result)
202 dev_err(&port->dev,
203 "%s - failed resubmitting read urb, error %d\n",
204 __func__, result);
Martin Jansen309a0572011-02-24 14:50:16 +0100205 /* Request CTS line state, sometimes during opening the current
206 * CTS state can be missed. */
207 send_control_msg(port, RESEND_CTS_STATE, 1);
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800208 return result;
209}
210
Alan Cox335f8512009-06-11 12:26:29 +0100211static void opticon_close(struct usb_serial_port *port)
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800212{
213 struct opticon_private *priv = usb_get_serial_data(port->serial);
214
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800215 /* shutdown our urbs */
216 usb_kill_urb(priv->bulk_read_urb);
217}
218
Martin Jansen309a0572011-02-24 14:50:16 +0100219static void opticon_write_control_callback(struct urb *urb)
Greg Kroah-Hartman648d4e12009-02-06 18:30:56 -0800220{
221 struct opticon_private *priv = urb->context;
222 int status = urb->status;
223 unsigned long flags;
224
225 /* free up the transfer buffer, as usb_free_urb() does not do this */
226 kfree(urb->transfer_buffer);
227
Alon Ziv0d930e52010-10-10 08:32:19 +0200228 /* setup packet may be set if we're using it for writing */
229 kfree(urb->setup_packet);
230
Greg Kroah-Hartman648d4e12009-02-06 18:30:56 -0800231 if (status)
232 dbg("%s - nonzero write bulk status received: %d",
233 __func__, status);
234
235 spin_lock_irqsave(&priv->lock, flags);
236 --priv->outstanding_urbs;
237 spin_unlock_irqrestore(&priv->lock, flags);
238
239 usb_serial_port_softint(priv->port);
240}
241
242static int opticon_write(struct tty_struct *tty, struct usb_serial_port *port,
243 const unsigned char *buf, int count)
244{
245 struct opticon_private *priv = usb_get_serial_data(port->serial);
246 struct usb_serial *serial = port->serial;
247 struct urb *urb;
248 unsigned char *buffer;
249 unsigned long flags;
250 int status;
Martin Jansen309a0572011-02-24 14:50:16 +0100251 struct usb_ctrlrequest *dr;
Greg Kroah-Hartman648d4e12009-02-06 18:30:56 -0800252
Greg Kroah-Hartman648d4e12009-02-06 18:30:56 -0800253 spin_lock_irqsave(&priv->lock, flags);
254 if (priv->outstanding_urbs > URB_UPPER_LIMIT) {
255 spin_unlock_irqrestore(&priv->lock, flags);
Joe Perches759f3632010-02-05 16:50:08 -0800256 dbg("%s - write limit hit", __func__);
Greg Kroah-Hartman648d4e12009-02-06 18:30:56 -0800257 return 0;
258 }
259 priv->outstanding_urbs++;
260 spin_unlock_irqrestore(&priv->lock, flags);
261
262 buffer = kmalloc(count, GFP_ATOMIC);
263 if (!buffer) {
264 dev_err(&port->dev, "out of memory\n");
265 count = -ENOMEM;
Martin Jansen309a0572011-02-24 14:50:16 +0100266
Greg Kroah-Hartman648d4e12009-02-06 18:30:56 -0800267 goto error_no_buffer;
268 }
269
270 urb = usb_alloc_urb(0, GFP_ATOMIC);
271 if (!urb) {
272 dev_err(&port->dev, "no more free urbs\n");
273 count = -ENOMEM;
274 goto error_no_urb;
275 }
276
277 memcpy(buffer, buf, count);
278
279 usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
280
Martin Jansen309a0572011-02-24 14:50:16 +0100281 /* The conncected devices do not have a bulk write endpoint,
282 * to transmit data to de barcode device the control endpoint is used */
283 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_NOIO);
Julia Lawallb0795bb2011-05-13 17:30:46 +0200284 if (!dr) {
285 dev_err(&port->dev, "out of memory\n");
286 count = -ENOMEM;
287 goto error;
288 }
Alon Ziv0d930e52010-10-10 08:32:19 +0200289
Martin Jansen309a0572011-02-24 14:50:16 +0100290 dr->bRequestType = USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT;
291 dr->bRequest = 0x01;
292 dr->wValue = 0;
293 dr->wIndex = 0;
294 dr->wLength = cpu_to_le16(count);
Alon Ziv0d930e52010-10-10 08:32:19 +0200295
Martin Jansen309a0572011-02-24 14:50:16 +0100296 usb_fill_control_urb(urb, serial->dev,
297 usb_sndctrlpipe(serial->dev, 0),
298 (unsigned char *)dr, buffer, count,
299 opticon_write_control_callback, priv);
Greg Kroah-Hartman648d4e12009-02-06 18:30:56 -0800300
301 /* send it down the pipe */
302 status = usb_submit_urb(urb, GFP_ATOMIC);
303 if (status) {
304 dev_err(&port->dev,
Martin Jansen309a0572011-02-24 14:50:16 +0100305 "%s - usb_submit_urb(write endpoint) failed status = %d\n",
Greg Kroah-Hartman648d4e12009-02-06 18:30:56 -0800306 __func__, status);
307 count = status;
308 goto error;
309 }
310
311 /* we are done with this urb, so let the host driver
312 * really free it when it is finished with it */
313 usb_free_urb(urb);
314
315 return count;
316error:
317 usb_free_urb(urb);
318error_no_urb:
319 kfree(buffer);
320error_no_buffer:
321 spin_lock_irqsave(&priv->lock, flags);
322 --priv->outstanding_urbs;
323 spin_unlock_irqrestore(&priv->lock, flags);
324 return count;
325}
326
327static int opticon_write_room(struct tty_struct *tty)
328{
329 struct usb_serial_port *port = tty->driver_data;
330 struct opticon_private *priv = usb_get_serial_data(port->serial);
331 unsigned long flags;
332
Greg Kroah-Hartman648d4e12009-02-06 18:30:56 -0800333 /*
334 * We really can take almost anything the user throws at us
335 * but let's pick a nice big number to tell the tty
336 * layer that we have lots of free space, unless we don't.
337 */
338 spin_lock_irqsave(&priv->lock, flags);
339 if (priv->outstanding_urbs > URB_UPPER_LIMIT * 2 / 3) {
340 spin_unlock_irqrestore(&priv->lock, flags);
Joe Perches759f3632010-02-05 16:50:08 -0800341 dbg("%s - write limit hit", __func__);
Greg Kroah-Hartman648d4e12009-02-06 18:30:56 -0800342 return 0;
343 }
344 spin_unlock_irqrestore(&priv->lock, flags);
345
346 return 2048;
347}
348
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800349static void opticon_throttle(struct tty_struct *tty)
350{
351 struct usb_serial_port *port = tty->driver_data;
352 struct opticon_private *priv = usb_get_serial_data(port->serial);
353 unsigned long flags;
354
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800355 spin_lock_irqsave(&priv->lock, flags);
356 priv->throttled = true;
357 spin_unlock_irqrestore(&priv->lock, flags);
358}
359
360
361static void opticon_unthrottle(struct tty_struct *tty)
362{
363 struct usb_serial_port *port = tty->driver_data;
364 struct opticon_private *priv = usb_get_serial_data(port->serial);
365 unsigned long flags;
Oliver Neukum88fa6592009-10-07 09:25:10 +0200366 int result, was_throttled;
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800367
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800368 spin_lock_irqsave(&priv->lock, flags);
369 priv->throttled = false;
Oliver Neukum88fa6592009-10-07 09:25:10 +0200370 was_throttled = priv->actually_throttled;
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800371 priv->actually_throttled = false;
372 spin_unlock_irqrestore(&priv->lock, flags);
373
Oliver Neukum88fa6592009-10-07 09:25:10 +0200374 if (was_throttled) {
375 result = usb_submit_urb(priv->bulk_read_urb, GFP_ATOMIC);
376 if (result)
377 dev_err(&port->dev,
378 "%s - failed submitting read urb, error %d\n",
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800379 __func__, result);
Oliver Neukum88fa6592009-10-07 09:25:10 +0200380 }
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800381}
382
Alan Cox60b33c12011-02-14 16:26:14 +0000383static int opticon_tiocmget(struct tty_struct *tty)
Greg Kroah-Hartmanfaac64a2009-02-06 18:31:46 -0800384{
385 struct usb_serial_port *port = tty->driver_data;
386 struct opticon_private *priv = usb_get_serial_data(port->serial);
387 unsigned long flags;
388 int result = 0;
389
Greg Kroah-Hartmanfaac64a2009-02-06 18:31:46 -0800390 spin_lock_irqsave(&priv->lock, flags);
391 if (priv->rts)
Martin Jansen309a0572011-02-24 14:50:16 +0100392 result |= TIOCM_RTS;
393 if (priv->cts)
394 result |= TIOCM_CTS;
Greg Kroah-Hartmanfaac64a2009-02-06 18:31:46 -0800395 spin_unlock_irqrestore(&priv->lock, flags);
396
397 dbg("%s - %x", __func__, result);
398 return result;
399}
400
Randy Dunlap4acfaf82011-04-03 11:42:00 -0700401static int opticon_tiocmset(struct tty_struct *tty,
Martin Jansen309a0572011-02-24 14:50:16 +0100402 unsigned int set, unsigned int clear)
403{
404 struct usb_serial_port *port = tty->driver_data;
Johan Hovold81d5a672012-04-25 15:56:29 +0200405 struct usb_serial *serial = port->serial;
Martin Jansen309a0572011-02-24 14:50:16 +0100406 struct opticon_private *priv = usb_get_serial_data(port->serial);
407 unsigned long flags;
408 bool rts;
409 bool changed = false;
Johan Hovold81d5a672012-04-25 15:56:29 +0200410 int ret;
Martin Jansen309a0572011-02-24 14:50:16 +0100411
Martin Jansen309a0572011-02-24 14:50:16 +0100412 /* We only support RTS so we only handle that */
413 spin_lock_irqsave(&priv->lock, flags);
414
415 rts = priv->rts;
416 if (set & TIOCM_RTS)
417 priv->rts = true;
418 if (clear & TIOCM_RTS)
419 priv->rts = false;
420 changed = rts ^ priv->rts;
421 spin_unlock_irqrestore(&priv->lock, flags);
422
423 if (!changed)
424 return 0;
425
426 /* Send the new RTS state to the connected device */
Johan Hovold81d5a672012-04-25 15:56:29 +0200427 mutex_lock(&serial->disc_mutex);
428 if (!serial->disconnected)
429 ret = send_control_msg(port, CONTROL_RTS, !rts);
430 else
431 ret = -ENODEV;
432 mutex_unlock(&serial->disc_mutex);
433
434 return ret;
Martin Jansen309a0572011-02-24 14:50:16 +0100435}
436
Greg Kroah-Hartmanfaac64a2009-02-06 18:31:46 -0800437static int get_serial_info(struct opticon_private *priv,
438 struct serial_struct __user *serial)
439{
440 struct serial_struct tmp;
441
442 if (!serial)
443 return -EFAULT;
444
445 memset(&tmp, 0x00, sizeof(tmp));
446
447 /* fake emulate a 16550 uart to make userspace code happy */
448 tmp.type = PORT_16550A;
449 tmp.line = priv->serial->minor;
450 tmp.port = 0;
451 tmp.irq = 0;
452 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
453 tmp.xmit_fifo_size = 1024;
454 tmp.baud_base = 9600;
455 tmp.close_delay = 5*HZ;
456 tmp.closing_wait = 30*HZ;
457
458 if (copy_to_user(serial, &tmp, sizeof(*serial)))
459 return -EFAULT;
460 return 0;
461}
462
Alan Cox00a0d0d2011-02-14 16:27:06 +0000463static int opticon_ioctl(struct tty_struct *tty,
Greg Kroah-Hartmanfaac64a2009-02-06 18:31:46 -0800464 unsigned int cmd, unsigned long arg)
465{
466 struct usb_serial_port *port = tty->driver_data;
467 struct opticon_private *priv = usb_get_serial_data(port->serial);
468
469 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
470
471 switch (cmd) {
472 case TIOCGSERIAL:
473 return get_serial_info(priv,
474 (struct serial_struct __user *)arg);
475 }
476
477 return -ENOIOCTLCMD;
478}
479
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800480static int opticon_startup(struct usb_serial *serial)
481{
482 struct opticon_private *priv;
483 struct usb_host_interface *intf;
484 int i;
485 int retval = -ENOMEM;
486 bool bulk_in_found = false;
487
488 /* create our private serial structure */
489 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
490 if (priv == NULL) {
491 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
492 return -ENOMEM;
493 }
494 spin_lock_init(&priv->lock);
495 priv->serial = serial;
496 priv->port = serial->port[0];
497 priv->udev = serial->dev;
Martin Jansen309a0572011-02-24 14:50:16 +0100498 priv->outstanding_urbs = 0; /* Init the outstanding urbs */
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800499
500 /* find our bulk endpoint */
501 intf = serial->interface->altsetting;
502 for (i = 0; i < intf->desc.bNumEndpoints; ++i) {
503 struct usb_endpoint_descriptor *endpoint;
504
505 endpoint = &intf->endpoint[i].desc;
506 if (!usb_endpoint_is_bulk_in(endpoint))
507 continue;
508
509 priv->bulk_read_urb = usb_alloc_urb(0, GFP_KERNEL);
510 if (!priv->bulk_read_urb) {
511 dev_err(&priv->udev->dev, "out of memory\n");
512 goto error;
513 }
514
Kuninori Morimoto29cc8892011-08-23 03:12:03 -0700515 priv->buffer_size = usb_endpoint_maxp(endpoint) * 2;
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800516 priv->bulk_in_buffer = kmalloc(priv->buffer_size, GFP_KERNEL);
517 if (!priv->bulk_in_buffer) {
518 dev_err(&priv->udev->dev, "out of memory\n");
519 goto error;
520 }
521
522 priv->bulk_address = endpoint->bEndpointAddress;
523
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800524 bulk_in_found = true;
525 break;
526 }
527
528 if (!bulk_in_found) {
529 dev_err(&priv->udev->dev,
530 "Error - the proper endpoints were not found!\n");
531 goto error;
532 }
533
534 usb_set_serial_data(serial, priv);
535 return 0;
536
537error:
538 usb_free_urb(priv->bulk_read_urb);
539 kfree(priv->bulk_in_buffer);
540 kfree(priv);
541 return retval;
542}
543
Alan Sternf9c99bb2009-06-02 11:53:55 -0400544static void opticon_disconnect(struct usb_serial *serial)
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800545{
546 struct opticon_private *priv = usb_get_serial_data(serial);
547
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800548 usb_kill_urb(priv->bulk_read_urb);
549 usb_free_urb(priv->bulk_read_urb);
Alan Sternf9c99bb2009-06-02 11:53:55 -0400550}
551
552static void opticon_release(struct usb_serial *serial)
553{
554 struct opticon_private *priv = usb_get_serial_data(serial);
555
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800556 kfree(priv->bulk_in_buffer);
557 kfree(priv);
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800558}
559
Greg Kroah-Hartmand5302962012-05-10 14:35:21 -0700560static int opticon_suspend(struct usb_serial *serial, pm_message_t message)
Oliver Neukumd1c07132009-01-14 18:34:06 +0100561{
Oliver Neukumd1c07132009-01-14 18:34:06 +0100562 struct opticon_private *priv = usb_get_serial_data(serial);
563
564 usb_kill_urb(priv->bulk_read_urb);
565 return 0;
566}
567
Greg Kroah-Hartmand5302962012-05-10 14:35:21 -0700568static int opticon_resume(struct usb_serial *serial)
Oliver Neukumd1c07132009-01-14 18:34:06 +0100569{
Oliver Neukumd1c07132009-01-14 18:34:06 +0100570 struct opticon_private *priv = usb_get_serial_data(serial);
571 struct usb_serial_port *port = serial->port[0];
572 int result;
573
Alan Cox82fc5942009-10-06 16:06:46 +0100574 mutex_lock(&port->port.mutex);
Alan Cox2a0785e2009-10-06 16:06:57 +0100575 /* This is protected by the port mutex against close/open */
576 if (test_bit(ASYNCB_INITIALIZED, &port->port.flags))
Oliver Neukumd1c07132009-01-14 18:34:06 +0100577 result = usb_submit_urb(priv->bulk_read_urb, GFP_NOIO);
578 else
579 result = 0;
Alan Cox82fc5942009-10-06 16:06:46 +0100580 mutex_unlock(&port->port.mutex);
Oliver Neukumd1c07132009-01-14 18:34:06 +0100581 return result;
582}
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800583
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800584static struct usb_serial_driver opticon_device = {
585 .driver = {
586 .owner = THIS_MODULE,
587 .name = "opticon",
588 },
589 .id_table = id_table,
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800590 .num_ports = 1,
591 .attach = opticon_startup,
592 .open = opticon_open,
593 .close = opticon_close,
Greg Kroah-Hartman648d4e12009-02-06 18:30:56 -0800594 .write = opticon_write,
595 .write_room = opticon_write_room,
Alan Sternf9c99bb2009-06-02 11:53:55 -0400596 .disconnect = opticon_disconnect,
597 .release = opticon_release,
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800598 .throttle = opticon_throttle,
599 .unthrottle = opticon_unthrottle,
Greg Kroah-Hartmanfaac64a2009-02-06 18:31:46 -0800600 .ioctl = opticon_ioctl,
601 .tiocmget = opticon_tiocmget,
Martin Jansen309a0572011-02-24 14:50:16 +0100602 .tiocmset = opticon_tiocmset,
Greg Kroah-Hartmand5302962012-05-10 14:35:21 -0700603 .suspend = opticon_suspend,
604 .resume = opticon_resume,
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800605};
606
Alan Sternf667dda2012-02-23 14:57:18 -0500607static struct usb_serial_driver * const serial_drivers[] = {
608 &opticon_device, NULL
609};
610
Greg Kroah-Hartman68e24112012-05-08 15:46:14 -0700611module_usb_serial_driver(serial_drivers, id_table);
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800612
Martin Jansen309a0572011-02-24 14:50:16 +0100613MODULE_DESCRIPTION(DRIVER_DESC);
Greg Kroah-Hartman57262b82008-11-03 13:27:03 -0800614MODULE_LICENSE("GPL");
615
616module_param(debug, bool, S_IRUGO | S_IWUSR);
617MODULE_PARM_DESC(debug, "Debug enabled or not");