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1/*
2 * REINER SCT cyberJack pinpad/e-com USB Chipcard Reader Driver
3 *
4 * Copyright (C) 2001 REINER SCT
5 * Author: Matthias Bruestle
6 *
7 * Contact: support@reiner-sct.com (see MAINTAINERS)
8 *
9 * This program is largely derived from work by the linux-usb group
10 * and associated source files. Please see the usb/serial files for
11 * individual credits and copyrights.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * Thanks to Greg Kroah-Hartman (greg@kroah.com) for his help and
19 * patience.
20 *
21 * In case of problems, please write to the contact e-mail address
22 * mentioned above.
23 *
24 * Please note that later models of the cyberjack reader family are
25 * supported by a libusb-based userspace device driver.
26 *
27 * Homepage: http://www.reiner-sct.de/support/treiber_cyberjack.php#linux
28 */
29
30
31#include <linux/kernel.h>
32#include <linux/errno.h>
33#include <linux/init.h>
34#include <linux/slab.h>
35#include <linux/tty.h>
36#include <linux/tty_driver.h>
37#include <linux/tty_flip.h>
38#include <linux/module.h>
39#include <linux/spinlock.h>
40#include <linux/uaccess.h>
41#include <linux/usb.h>
42#include <linux/usb/serial.h>
43
44#define CYBERJACK_LOCAL_BUF_SIZE 32
45
46static int debug;
47
48/*
49 * Version Information
50 */
51#define DRIVER_VERSION "v1.01"
52#define DRIVER_AUTHOR "Matthias Bruestle"
53#define DRIVER_DESC "REINER SCT cyberJack pinpad/e-com USB Chipcard Reader Driver"
54
55
56#define CYBERJACK_VENDOR_ID 0x0C4B
57#define CYBERJACK_PRODUCT_ID 0x0100
58
59/* Function prototypes */
60static int cyberjack_startup(struct usb_serial *serial);
61static void cyberjack_disconnect(struct usb_serial *serial);
62static void cyberjack_release(struct usb_serial *serial);
63static int cyberjack_open(struct tty_struct *tty,
64 struct usb_serial_port *port);
65static void cyberjack_close(struct usb_serial_port *port);
66static int cyberjack_write(struct tty_struct *tty,
67 struct usb_serial_port *port, const unsigned char *buf, int count);
68static int cyberjack_write_room(struct tty_struct *tty);
69static void cyberjack_read_int_callback(struct urb *urb);
70static void cyberjack_read_bulk_callback(struct urb *urb);
71static void cyberjack_write_bulk_callback(struct urb *urb);
72
73static const struct usb_device_id id_table[] = {
74 { USB_DEVICE(CYBERJACK_VENDOR_ID, CYBERJACK_PRODUCT_ID) },
75 { } /* Terminating entry */
76};
77
78MODULE_DEVICE_TABLE(usb, id_table);
79
80static struct usb_driver cyberjack_driver = {
81 .name = "cyberjack",
82 .probe = usb_serial_probe,
83 .disconnect = usb_serial_disconnect,
84 .id_table = id_table,
85 .no_dynamic_id = 1,
86};
87
88static struct usb_serial_driver cyberjack_device = {
89 .driver = {
90 .owner = THIS_MODULE,
91 .name = "cyberjack",
92 },
93 .description = "Reiner SCT Cyberjack USB card reader",
94 .usb_driver = &cyberjack_driver,
95 .id_table = id_table,
96 .num_ports = 1,
97 .attach = cyberjack_startup,
98 .disconnect = cyberjack_disconnect,
99 .release = cyberjack_release,
100 .open = cyberjack_open,
101 .close = cyberjack_close,
102 .write = cyberjack_write,
103 .write_room = cyberjack_write_room,
104 .read_int_callback = cyberjack_read_int_callback,
105 .read_bulk_callback = cyberjack_read_bulk_callback,
106 .write_bulk_callback = cyberjack_write_bulk_callback,
107};
108
109struct cyberjack_private {
110 spinlock_t lock; /* Lock for SMP */
111 short rdtodo; /* Bytes still to read */
112 unsigned char wrbuf[5*64]; /* Buffer for collecting data to write */
113 short wrfilled; /* Overall data size we already got */
114 short wrsent; /* Data already sent */
115};
116
117/* do some startup allocations not currently performed by usb_serial_probe() */
118static int cyberjack_startup(struct usb_serial *serial)
119{
120 struct cyberjack_private *priv;
121 int i;
122
123 dbg("%s", __func__);
124
125 /* allocate the private data structure */
126 priv = kmalloc(sizeof(struct cyberjack_private), GFP_KERNEL);
127 if (!priv)
128 return -ENOMEM;
129
130 /* set initial values */
131 spin_lock_init(&priv->lock);
132 priv->rdtodo = 0;
133 priv->wrfilled = 0;
134 priv->wrsent = 0;
135 usb_set_serial_port_data(serial->port[0], priv);
136
137 init_waitqueue_head(&serial->port[0]->write_wait);
138
139 for (i = 0; i < serial->num_ports; ++i) {
140 int result;
141 serial->port[i]->interrupt_in_urb->dev = serial->dev;
142 result = usb_submit_urb(serial->port[i]->interrupt_in_urb,
143 GFP_KERNEL);
144 if (result)
145 dev_err(&serial->dev->dev,
146 "usb_submit_urb(read int) failed\n");
147 dbg("%s - usb_submit_urb(int urb)", __func__);
148 }
149
150 return 0;
151}
152
153static void cyberjack_disconnect(struct usb_serial *serial)
154{
155 int i;
156
157 dbg("%s", __func__);
158
159 for (i = 0; i < serial->num_ports; ++i)
160 usb_kill_urb(serial->port[i]->interrupt_in_urb);
161}
162
163static void cyberjack_release(struct usb_serial *serial)
164{
165 int i;
166
167 dbg("%s", __func__);
168
169 for (i = 0; i < serial->num_ports; ++i) {
170 /* My special items, the standard routines free my urbs */
171 kfree(usb_get_serial_port_data(serial->port[i]));
172 }
173}
174
175static int cyberjack_open(struct tty_struct *tty,
176 struct usb_serial_port *port)
177{
178 struct cyberjack_private *priv;
179 unsigned long flags;
180 int result = 0;
181
182 dbg("%s - port %d", __func__, port->number);
183
184 dbg("%s - usb_clear_halt", __func__);
185 usb_clear_halt(port->serial->dev, port->write_urb->pipe);
186
187 priv = usb_get_serial_port_data(port);
188 spin_lock_irqsave(&priv->lock, flags);
189 priv->rdtodo = 0;
190 priv->wrfilled = 0;
191 priv->wrsent = 0;
192 spin_unlock_irqrestore(&priv->lock, flags);
193
194 return result;
195}
196
197static void cyberjack_close(struct usb_serial_port *port)
198{
199 dbg("%s - port %d", __func__, port->number);
200
201 if (port->serial->dev) {
202 /* shutdown any bulk reads that might be going on */
203 usb_kill_urb(port->write_urb);
204 usb_kill_urb(port->read_urb);
205 }
206}
207
208static int cyberjack_write(struct tty_struct *tty,
209 struct usb_serial_port *port, const unsigned char *buf, int count)
210{
211 struct usb_serial *serial = port->serial;
212 struct cyberjack_private *priv = usb_get_serial_port_data(port);
213 unsigned long flags;
214 int result;
215 int wrexpected;
216
217 dbg("%s - port %d", __func__, port->number);
218
219 if (count == 0) {
220 dbg("%s - write request of 0 bytes", __func__);
221 return 0;
222 }
223
224 spin_lock_bh(&port->lock);
225 if (port->write_urb_busy) {
226 spin_unlock_bh(&port->lock);
227 dbg("%s - already writing", __func__);
228 return 0;
229 }
230 port->write_urb_busy = 1;
231 spin_unlock_bh(&port->lock);
232
233 spin_lock_irqsave(&priv->lock, flags);
234
235 if (count+priv->wrfilled > sizeof(priv->wrbuf)) {
236 /* To much data for buffer. Reset buffer. */
237 priv->wrfilled = 0;
238 port->write_urb_busy = 0;
239 spin_unlock_irqrestore(&priv->lock, flags);
240 return 0;
241 }
242
243 /* Copy data */
244 memcpy(priv->wrbuf + priv->wrfilled, buf, count);
245
246 usb_serial_debug_data(debug, &port->dev, __func__, count,
247 priv->wrbuf + priv->wrfilled);
248 priv->wrfilled += count;
249
250 if (priv->wrfilled >= 3) {
251 wrexpected = ((int)priv->wrbuf[2]<<8)+priv->wrbuf[1]+3;
252 dbg("%s - expected data: %d", __func__, wrexpected);
253 } else
254 wrexpected = sizeof(priv->wrbuf);
255
256 if (priv->wrfilled >= wrexpected) {
257 /* We have enough data to begin transmission */
258 int length;
259
260 dbg("%s - transmitting data (frame 1)", __func__);
261 length = (wrexpected > port->bulk_out_size) ?
262 port->bulk_out_size : wrexpected;
263
264 memcpy(port->write_urb->transfer_buffer, priv->wrbuf, length);
265 priv->wrsent = length;
266
267 /* set up our urb */
268 usb_fill_bulk_urb(port->write_urb, serial->dev,
269 usb_sndbulkpipe(serial->dev, port->bulk_out_endpointAddress),
270 port->write_urb->transfer_buffer, length,
271 ((serial->type->write_bulk_callback) ?
272 serial->type->write_bulk_callback :
273 cyberjack_write_bulk_callback),
274 port);
275
276 /* send the data out the bulk port */
277 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
278 if (result) {
279 dev_err(&port->dev,
280 "%s - failed submitting write urb, error %d",
281 __func__, result);
282 /* Throw away data. No better idea what to do with it. */
283 priv->wrfilled = 0;
284 priv->wrsent = 0;
285 spin_unlock_irqrestore(&priv->lock, flags);
286 port->write_urb_busy = 0;
287 return 0;
288 }
289
290 dbg("%s - priv->wrsent=%d", __func__, priv->wrsent);
291 dbg("%s - priv->wrfilled=%d", __func__, priv->wrfilled);
292
293 if (priv->wrsent >= priv->wrfilled) {
294 dbg("%s - buffer cleaned", __func__);
295 memset(priv->wrbuf, 0, sizeof(priv->wrbuf));
296 priv->wrfilled = 0;
297 priv->wrsent = 0;
298 }
299 }
300
301 spin_unlock_irqrestore(&priv->lock, flags);
302
303 return count;
304}
305
306static int cyberjack_write_room(struct tty_struct *tty)
307{
308 /* FIXME: .... */
309 return CYBERJACK_LOCAL_BUF_SIZE;
310}
311
312static void cyberjack_read_int_callback(struct urb *urb)
313{
314 struct usb_serial_port *port = urb->context;
315 struct cyberjack_private *priv = usb_get_serial_port_data(port);
316 unsigned char *data = urb->transfer_buffer;
317 int status = urb->status;
318 int result;
319
320 dbg("%s - port %d", __func__, port->number);
321
322 /* the urb might have been killed. */
323 if (status)
324 return;
325
326 usb_serial_debug_data(debug, &port->dev, __func__,
327 urb->actual_length, data);
328
329 /* React only to interrupts signaling a bulk_in transfer */
330 if (urb->actual_length == 4 && data[0] == 0x01) {
331 short old_rdtodo;
332
333 /* This is a announcement of coming bulk_ins. */
334 unsigned short size = ((unsigned short)data[3]<<8)+data[2]+3;
335
336 spin_lock(&priv->lock);
337
338 old_rdtodo = priv->rdtodo;
339
340 if (old_rdtodo + size < old_rdtodo) {
341 dbg("To many bulk_in urbs to do.");
342 spin_unlock(&priv->lock);
343 goto resubmit;
344 }
345
346 /* "+=" is probably more fault tollerant than "=" */
347 priv->rdtodo += size;
348
349 dbg("%s - rdtodo: %d", __func__, priv->rdtodo);
350
351 spin_unlock(&priv->lock);
352
353 if (!old_rdtodo) {
354 port->read_urb->dev = port->serial->dev;
355 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
356 if (result)
357 dev_err(&port->dev, "%s - failed resubmitting "
358 "read urb, error %d\n",
359 __func__, result);
360 dbg("%s - usb_submit_urb(read urb)", __func__);
361 }
362 }
363
364resubmit:
365 port->interrupt_in_urb->dev = port->serial->dev;
366 result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
367 if (result)
368 dev_err(&port->dev, "usb_submit_urb(read int) failed\n");
369 dbg("%s - usb_submit_urb(int urb)", __func__);
370}
371
372static void cyberjack_read_bulk_callback(struct urb *urb)
373{
374 struct usb_serial_port *port = urb->context;
375 struct cyberjack_private *priv = usb_get_serial_port_data(port);
376 struct tty_struct *tty;
377 unsigned char *data = urb->transfer_buffer;
378 short todo;
379 int result;
380 int status = urb->status;
381
382 dbg("%s - port %d", __func__, port->number);
383
384 usb_serial_debug_data(debug, &port->dev, __func__,
385 urb->actual_length, data);
386 if (status) {
387 dbg("%s - nonzero read bulk status received: %d",
388 __func__, status);
389 return;
390 }
391
392 tty = tty_port_tty_get(&port->port);
393 if (!tty) {
394 dbg("%s - ignoring since device not open", __func__);
395 return;
396 }
397 if (urb->actual_length) {
398 tty_insert_flip_string(tty, data, urb->actual_length);
399 tty_flip_buffer_push(tty);
400 }
401 tty_kref_put(tty);
402
403 spin_lock(&priv->lock);
404
405 /* Reduce urbs to do by one. */
406 priv->rdtodo -= urb->actual_length;
407 /* Just to be sure */
408 if (priv->rdtodo < 0)
409 priv->rdtodo = 0;
410 todo = priv->rdtodo;
411
412 spin_unlock(&priv->lock);
413
414 dbg("%s - rdtodo: %d", __func__, todo);
415
416 /* Continue to read if we have still urbs to do. */
417 if (todo /* || (urb->actual_length==port->bulk_in_endpointAddress)*/) {
418 port->read_urb->dev = port->serial->dev;
419 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
420 if (result)
421 dev_err(&port->dev, "%s - failed resubmitting read "
422 "urb, error %d\n", __func__, result);
423 dbg("%s - usb_submit_urb(read urb)", __func__);
424 }
425}
426
427static void cyberjack_write_bulk_callback(struct urb *urb)
428{
429 struct usb_serial_port *port = urb->context;
430 struct cyberjack_private *priv = usb_get_serial_port_data(port);
431 int status = urb->status;
432
433 dbg("%s - port %d", __func__, port->number);
434
435 port->write_urb_busy = 0;
436 if (status) {
437 dbg("%s - nonzero write bulk status received: %d",
438 __func__, status);
439 return;
440 }
441
442 spin_lock(&priv->lock);
443
444 /* only do something if we have more data to send */
445 if (priv->wrfilled) {
446 int length, blksize, result;
447
448 dbg("%s - transmitting data (frame n)", __func__);
449
450 length = ((priv->wrfilled - priv->wrsent) > port->bulk_out_size) ?
451 port->bulk_out_size : (priv->wrfilled - priv->wrsent);
452
453 memcpy(port->write_urb->transfer_buffer,
454 priv->wrbuf + priv->wrsent, length);
455 priv->wrsent += length;
456
457 /* set up our urb */
458 usb_fill_bulk_urb(port->write_urb, port->serial->dev,
459 usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress),
460 port->write_urb->transfer_buffer, length,
461 ((port->serial->type->write_bulk_callback) ?
462 port->serial->type->write_bulk_callback :
463 cyberjack_write_bulk_callback),
464 port);
465
466 /* send the data out the bulk port */
467 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
468 if (result) {
469 dev_err(&port->dev,
470 "%s - failed submitting write urb, error %d\n",
471 __func__, result);
472 /* Throw away data. No better idea what to do with it. */
473 priv->wrfilled = 0;
474 priv->wrsent = 0;
475 goto exit;
476 }
477
478 dbg("%s - priv->wrsent=%d", __func__, priv->wrsent);
479 dbg("%s - priv->wrfilled=%d", __func__, priv->wrfilled);
480
481 blksize = ((int)priv->wrbuf[2]<<8)+priv->wrbuf[1]+3;
482
483 if (priv->wrsent >= priv->wrfilled ||
484 priv->wrsent >= blksize) {
485 dbg("%s - buffer cleaned", __func__);
486 memset(priv->wrbuf, 0, sizeof(priv->wrbuf));
487 priv->wrfilled = 0;
488 priv->wrsent = 0;
489 }
490 }
491
492exit:
493 spin_unlock(&priv->lock);
494 usb_serial_port_softint(port);
495}
496
497static int __init cyberjack_init(void)
498{
499 int retval;
500 retval = usb_serial_register(&cyberjack_device);
501 if (retval)
502 goto failed_usb_serial_register;
503 retval = usb_register(&cyberjack_driver);
504 if (retval)
505 goto failed_usb_register;
506
507 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION " "
508 DRIVER_AUTHOR "\n");
509 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
510
511 return 0;
512failed_usb_register:
513 usb_serial_deregister(&cyberjack_device);
514failed_usb_serial_register:
515 return retval;
516}
517
518static void __exit cyberjack_exit(void)
519{
520 usb_deregister(&cyberjack_driver);
521 usb_serial_deregister(&cyberjack_device);
522}
523
524module_init(cyberjack_init);
525module_exit(cyberjack_exit);
526
527MODULE_AUTHOR(DRIVER_AUTHOR);
528MODULE_DESCRIPTION(DRIVER_DESC);
529MODULE_VERSION(DRIVER_VERSION);
530MODULE_LICENSE("GPL");
531
532module_param(debug, bool, S_IRUGO | S_IWUSR);
533MODULE_PARM_DESC(debug, "Debug enabled or not");
1/*
2 * REINER SCT cyberJack pinpad/e-com USB Chipcard Reader Driver
3 *
4 * Copyright (C) 2001 REINER SCT
5 * Author: Matthias Bruestle
6 *
7 * Contact: support@reiner-sct.com (see MAINTAINERS)
8 *
9 * This program is largely derived from work by the linux-usb group
10 * and associated source files. Please see the usb/serial files for
11 * individual credits and copyrights.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * Thanks to Greg Kroah-Hartman (greg@kroah.com) for his help and
19 * patience.
20 *
21 * In case of problems, please write to the contact e-mail address
22 * mentioned above.
23 *
24 * Please note that later models of the cyberjack reader family are
25 * supported by a libusb-based userspace device driver.
26 *
27 * Homepage: http://www.reiner-sct.de/support/treiber_cyberjack.php#linux
28 */
29
30
31#include <linux/kernel.h>
32#include <linux/errno.h>
33#include <linux/slab.h>
34#include <linux/tty.h>
35#include <linux/tty_driver.h>
36#include <linux/tty_flip.h>
37#include <linux/module.h>
38#include <linux/spinlock.h>
39#include <linux/uaccess.h>
40#include <linux/usb.h>
41#include <linux/usb/serial.h>
42
43#define CYBERJACK_LOCAL_BUF_SIZE 32
44
45#define DRIVER_AUTHOR "Matthias Bruestle"
46#define DRIVER_DESC "REINER SCT cyberJack pinpad/e-com USB Chipcard Reader Driver"
47
48
49#define CYBERJACK_VENDOR_ID 0x0C4B
50#define CYBERJACK_PRODUCT_ID 0x0100
51
52/* Function prototypes */
53static int cyberjack_attach(struct usb_serial *serial);
54static int cyberjack_port_probe(struct usb_serial_port *port);
55static int cyberjack_port_remove(struct usb_serial_port *port);
56static int cyberjack_open(struct tty_struct *tty,
57 struct usb_serial_port *port);
58static void cyberjack_close(struct usb_serial_port *port);
59static int cyberjack_write(struct tty_struct *tty,
60 struct usb_serial_port *port, const unsigned char *buf, int count);
61static int cyberjack_write_room(struct tty_struct *tty);
62static void cyberjack_read_int_callback(struct urb *urb);
63static void cyberjack_read_bulk_callback(struct urb *urb);
64static void cyberjack_write_bulk_callback(struct urb *urb);
65
66static const struct usb_device_id id_table[] = {
67 { USB_DEVICE(CYBERJACK_VENDOR_ID, CYBERJACK_PRODUCT_ID) },
68 { } /* Terminating entry */
69};
70
71MODULE_DEVICE_TABLE(usb, id_table);
72
73static struct usb_serial_driver cyberjack_device = {
74 .driver = {
75 .owner = THIS_MODULE,
76 .name = "cyberjack",
77 },
78 .description = "Reiner SCT Cyberjack USB card reader",
79 .id_table = id_table,
80 .num_ports = 1,
81 .attach = cyberjack_attach,
82 .port_probe = cyberjack_port_probe,
83 .port_remove = cyberjack_port_remove,
84 .open = cyberjack_open,
85 .close = cyberjack_close,
86 .write = cyberjack_write,
87 .write_room = cyberjack_write_room,
88 .read_int_callback = cyberjack_read_int_callback,
89 .read_bulk_callback = cyberjack_read_bulk_callback,
90 .write_bulk_callback = cyberjack_write_bulk_callback,
91};
92
93static struct usb_serial_driver * const serial_drivers[] = {
94 &cyberjack_device, NULL
95};
96
97struct cyberjack_private {
98 spinlock_t lock; /* Lock for SMP */
99 short rdtodo; /* Bytes still to read */
100 unsigned char wrbuf[5*64]; /* Buffer for collecting data to write */
101 short wrfilled; /* Overall data size we already got */
102 short wrsent; /* Data already sent */
103};
104
105static int cyberjack_attach(struct usb_serial *serial)
106{
107 if (serial->num_bulk_out < serial->num_ports)
108 return -ENODEV;
109
110 return 0;
111}
112
113static int cyberjack_port_probe(struct usb_serial_port *port)
114{
115 struct cyberjack_private *priv;
116 int result;
117
118 priv = kmalloc(sizeof(struct cyberjack_private), GFP_KERNEL);
119 if (!priv)
120 return -ENOMEM;
121
122 spin_lock_init(&priv->lock);
123 priv->rdtodo = 0;
124 priv->wrfilled = 0;
125 priv->wrsent = 0;
126
127 usb_set_serial_port_data(port, priv);
128
129 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
130 if (result)
131 dev_err(&port->dev, "usb_submit_urb(read int) failed\n");
132
133 return 0;
134}
135
136static int cyberjack_port_remove(struct usb_serial_port *port)
137{
138 struct cyberjack_private *priv;
139
140 usb_kill_urb(port->interrupt_in_urb);
141
142 priv = usb_get_serial_port_data(port);
143 kfree(priv);
144
145 return 0;
146}
147
148static int cyberjack_open(struct tty_struct *tty,
149 struct usb_serial_port *port)
150{
151 struct cyberjack_private *priv;
152 unsigned long flags;
153
154 dev_dbg(&port->dev, "%s - usb_clear_halt\n", __func__);
155 usb_clear_halt(port->serial->dev, port->write_urb->pipe);
156
157 priv = usb_get_serial_port_data(port);
158 spin_lock_irqsave(&priv->lock, flags);
159 priv->rdtodo = 0;
160 priv->wrfilled = 0;
161 priv->wrsent = 0;
162 spin_unlock_irqrestore(&priv->lock, flags);
163
164 return 0;
165}
166
167static void cyberjack_close(struct usb_serial_port *port)
168{
169 usb_kill_urb(port->write_urb);
170 usb_kill_urb(port->read_urb);
171}
172
173static int cyberjack_write(struct tty_struct *tty,
174 struct usb_serial_port *port, const unsigned char *buf, int count)
175{
176 struct device *dev = &port->dev;
177 struct cyberjack_private *priv = usb_get_serial_port_data(port);
178 unsigned long flags;
179 int result;
180 int wrexpected;
181
182 if (count == 0) {
183 dev_dbg(dev, "%s - write request of 0 bytes\n", __func__);
184 return 0;
185 }
186
187 if (!test_and_clear_bit(0, &port->write_urbs_free)) {
188 dev_dbg(dev, "%s - already writing\n", __func__);
189 return 0;
190 }
191
192 spin_lock_irqsave(&priv->lock, flags);
193
194 if (count+priv->wrfilled > sizeof(priv->wrbuf)) {
195 /* To much data for buffer. Reset buffer. */
196 priv->wrfilled = 0;
197 spin_unlock_irqrestore(&priv->lock, flags);
198 set_bit(0, &port->write_urbs_free);
199 return 0;
200 }
201
202 /* Copy data */
203 memcpy(priv->wrbuf + priv->wrfilled, buf, count);
204
205 usb_serial_debug_data(dev, __func__, count, priv->wrbuf + priv->wrfilled);
206 priv->wrfilled += count;
207
208 if (priv->wrfilled >= 3) {
209 wrexpected = ((int)priv->wrbuf[2]<<8)+priv->wrbuf[1]+3;
210 dev_dbg(dev, "%s - expected data: %d\n", __func__, wrexpected);
211 } else
212 wrexpected = sizeof(priv->wrbuf);
213
214 if (priv->wrfilled >= wrexpected) {
215 /* We have enough data to begin transmission */
216 int length;
217
218 dev_dbg(dev, "%s - transmitting data (frame 1)\n", __func__);
219 length = (wrexpected > port->bulk_out_size) ?
220 port->bulk_out_size : wrexpected;
221
222 memcpy(port->write_urb->transfer_buffer, priv->wrbuf, length);
223 priv->wrsent = length;
224
225 /* set up our urb */
226 port->write_urb->transfer_buffer_length = length;
227
228 /* send the data out the bulk port */
229 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
230 if (result) {
231 dev_err(&port->dev,
232 "%s - failed submitting write urb, error %d\n",
233 __func__, result);
234 /* Throw away data. No better idea what to do with it. */
235 priv->wrfilled = 0;
236 priv->wrsent = 0;
237 spin_unlock_irqrestore(&priv->lock, flags);
238 set_bit(0, &port->write_urbs_free);
239 return 0;
240 }
241
242 dev_dbg(dev, "%s - priv->wrsent=%d\n", __func__, priv->wrsent);
243 dev_dbg(dev, "%s - priv->wrfilled=%d\n", __func__, priv->wrfilled);
244
245 if (priv->wrsent >= priv->wrfilled) {
246 dev_dbg(dev, "%s - buffer cleaned\n", __func__);
247 memset(priv->wrbuf, 0, sizeof(priv->wrbuf));
248 priv->wrfilled = 0;
249 priv->wrsent = 0;
250 }
251 }
252
253 spin_unlock_irqrestore(&priv->lock, flags);
254
255 return count;
256}
257
258static int cyberjack_write_room(struct tty_struct *tty)
259{
260 /* FIXME: .... */
261 return CYBERJACK_LOCAL_BUF_SIZE;
262}
263
264static void cyberjack_read_int_callback(struct urb *urb)
265{
266 struct usb_serial_port *port = urb->context;
267 struct cyberjack_private *priv = usb_get_serial_port_data(port);
268 struct device *dev = &port->dev;
269 unsigned char *data = urb->transfer_buffer;
270 int status = urb->status;
271 int result;
272
273 /* the urb might have been killed. */
274 if (status)
275 return;
276
277 usb_serial_debug_data(dev, __func__, urb->actual_length, data);
278
279 /* React only to interrupts signaling a bulk_in transfer */
280 if (urb->actual_length == 4 && data[0] == 0x01) {
281 short old_rdtodo;
282
283 /* This is a announcement of coming bulk_ins. */
284 unsigned short size = ((unsigned short)data[3]<<8)+data[2]+3;
285
286 spin_lock(&priv->lock);
287
288 old_rdtodo = priv->rdtodo;
289
290 if (old_rdtodo > SHRT_MAX - size) {
291 dev_dbg(dev, "To many bulk_in urbs to do.\n");
292 spin_unlock(&priv->lock);
293 goto resubmit;
294 }
295
296 /* "+=" is probably more fault tolerant than "=" */
297 priv->rdtodo += size;
298
299 dev_dbg(dev, "%s - rdtodo: %d\n", __func__, priv->rdtodo);
300
301 spin_unlock(&priv->lock);
302
303 if (!old_rdtodo) {
304 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
305 if (result)
306 dev_err(dev, "%s - failed resubmitting read urb, error %d\n",
307 __func__, result);
308 dev_dbg(dev, "%s - usb_submit_urb(read urb)\n", __func__);
309 }
310 }
311
312resubmit:
313 result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
314 if (result)
315 dev_err(&port->dev, "usb_submit_urb(read int) failed\n");
316 dev_dbg(dev, "%s - usb_submit_urb(int urb)\n", __func__);
317}
318
319static void cyberjack_read_bulk_callback(struct urb *urb)
320{
321 struct usb_serial_port *port = urb->context;
322 struct cyberjack_private *priv = usb_get_serial_port_data(port);
323 struct device *dev = &port->dev;
324 unsigned char *data = urb->transfer_buffer;
325 short todo;
326 int result;
327 int status = urb->status;
328
329 usb_serial_debug_data(dev, __func__, urb->actual_length, data);
330 if (status) {
331 dev_dbg(dev, "%s - nonzero read bulk status received: %d\n",
332 __func__, status);
333 return;
334 }
335
336 if (urb->actual_length) {
337 tty_insert_flip_string(&port->port, data, urb->actual_length);
338 tty_flip_buffer_push(&port->port);
339 }
340
341 spin_lock(&priv->lock);
342
343 /* Reduce urbs to do by one. */
344 priv->rdtodo -= urb->actual_length;
345 /* Just to be sure */
346 if (priv->rdtodo < 0)
347 priv->rdtodo = 0;
348 todo = priv->rdtodo;
349
350 spin_unlock(&priv->lock);
351
352 dev_dbg(dev, "%s - rdtodo: %d\n", __func__, todo);
353
354 /* Continue to read if we have still urbs to do. */
355 if (todo /* || (urb->actual_length==port->bulk_in_endpointAddress)*/) {
356 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
357 if (result)
358 dev_err(dev, "%s - failed resubmitting read urb, error %d\n",
359 __func__, result);
360 dev_dbg(dev, "%s - usb_submit_urb(read urb)\n", __func__);
361 }
362}
363
364static void cyberjack_write_bulk_callback(struct urb *urb)
365{
366 struct usb_serial_port *port = urb->context;
367 struct cyberjack_private *priv = usb_get_serial_port_data(port);
368 struct device *dev = &port->dev;
369 int status = urb->status;
370
371 set_bit(0, &port->write_urbs_free);
372 if (status) {
373 dev_dbg(dev, "%s - nonzero write bulk status received: %d\n",
374 __func__, status);
375 return;
376 }
377
378 spin_lock(&priv->lock);
379
380 /* only do something if we have more data to send */
381 if (priv->wrfilled) {
382 int length, blksize, result;
383
384 dev_dbg(dev, "%s - transmitting data (frame n)\n", __func__);
385
386 length = ((priv->wrfilled - priv->wrsent) > port->bulk_out_size) ?
387 port->bulk_out_size : (priv->wrfilled - priv->wrsent);
388
389 memcpy(port->write_urb->transfer_buffer,
390 priv->wrbuf + priv->wrsent, length);
391 priv->wrsent += length;
392
393 /* set up our urb */
394 port->write_urb->transfer_buffer_length = length;
395
396 /* send the data out the bulk port */
397 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
398 if (result) {
399 dev_err(dev, "%s - failed submitting write urb, error %d\n",
400 __func__, result);
401 /* Throw away data. No better idea what to do with it. */
402 priv->wrfilled = 0;
403 priv->wrsent = 0;
404 goto exit;
405 }
406
407 dev_dbg(dev, "%s - priv->wrsent=%d\n", __func__, priv->wrsent);
408 dev_dbg(dev, "%s - priv->wrfilled=%d\n", __func__, priv->wrfilled);
409
410 blksize = ((int)priv->wrbuf[2]<<8)+priv->wrbuf[1]+3;
411
412 if (priv->wrsent >= priv->wrfilled ||
413 priv->wrsent >= blksize) {
414 dev_dbg(dev, "%s - buffer cleaned\n", __func__);
415 memset(priv->wrbuf, 0, sizeof(priv->wrbuf));
416 priv->wrfilled = 0;
417 priv->wrsent = 0;
418 }
419 }
420
421exit:
422 spin_unlock(&priv->lock);
423 usb_serial_port_softint(port);
424}
425
426module_usb_serial_driver(serial_drivers, id_table);
427
428MODULE_AUTHOR(DRIVER_AUTHOR);
429MODULE_DESCRIPTION(DRIVER_DESC);
430MODULE_LICENSE("GPL");