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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * REINER SCT cyberJack pinpad/e-com USB Chipcard Reader Driver
4 *
5 * Copyright (C) 2001 REINER SCT
6 * Author: Matthias Bruestle
7 *
8 * Contact: support@reiner-sct.com (see MAINTAINERS)
9 *
10 * This program is largely derived from work by the linux-usb group
11 * and associated source files. Please see the usb/serial files for
12 * individual credits and copyrights.
13 *
14 * Thanks to Greg Kroah-Hartman (greg@kroah.com) for his help and
15 * patience.
16 *
17 * In case of problems, please write to the contact e-mail address
18 * mentioned above.
19 *
20 * Please note that later models of the cyberjack reader family are
21 * supported by a libusb-based userspace device driver.
22 *
23 * Homepage: http://www.reiner-sct.de/support/treiber_cyberjack.php#linux
24 */
25
26
27#include <linux/kernel.h>
28#include <linux/errno.h>
29#include <linux/slab.h>
30#include <linux/tty.h>
31#include <linux/tty_driver.h>
32#include <linux/tty_flip.h>
33#include <linux/module.h>
34#include <linux/spinlock.h>
35#include <linux/uaccess.h>
36#include <linux/usb.h>
37#include <linux/usb/serial.h>
38
39#define CYBERJACK_LOCAL_BUF_SIZE 32
40
41#define DRIVER_AUTHOR "Matthias Bruestle"
42#define DRIVER_DESC "REINER SCT cyberJack pinpad/e-com USB Chipcard Reader Driver"
43
44
45#define CYBERJACK_VENDOR_ID 0x0C4B
46#define CYBERJACK_PRODUCT_ID 0x0100
47
48/* Function prototypes */
49static int cyberjack_port_probe(struct usb_serial_port *port);
50static int cyberjack_port_remove(struct usb_serial_port *port);
51static int cyberjack_open(struct tty_struct *tty,
52 struct usb_serial_port *port);
53static void cyberjack_close(struct usb_serial_port *port);
54static int cyberjack_write(struct tty_struct *tty,
55 struct usb_serial_port *port, const unsigned char *buf, int count);
56static int cyberjack_write_room(struct tty_struct *tty);
57static void cyberjack_read_int_callback(struct urb *urb);
58static void cyberjack_read_bulk_callback(struct urb *urb);
59static void cyberjack_write_bulk_callback(struct urb *urb);
60
61static const struct usb_device_id id_table[] = {
62 { USB_DEVICE(CYBERJACK_VENDOR_ID, CYBERJACK_PRODUCT_ID) },
63 { } /* Terminating entry */
64};
65
66MODULE_DEVICE_TABLE(usb, id_table);
67
68static struct usb_serial_driver cyberjack_device = {
69 .driver = {
70 .owner = THIS_MODULE,
71 .name = "cyberjack",
72 },
73 .description = "Reiner SCT Cyberjack USB card reader",
74 .id_table = id_table,
75 .num_ports = 1,
76 .num_bulk_out = 1,
77 .port_probe = cyberjack_port_probe,
78 .port_remove = cyberjack_port_remove,
79 .open = cyberjack_open,
80 .close = cyberjack_close,
81 .write = cyberjack_write,
82 .write_room = cyberjack_write_room,
83 .read_int_callback = cyberjack_read_int_callback,
84 .read_bulk_callback = cyberjack_read_bulk_callback,
85 .write_bulk_callback = cyberjack_write_bulk_callback,
86};
87
88static struct usb_serial_driver * const serial_drivers[] = {
89 &cyberjack_device, NULL
90};
91
92struct cyberjack_private {
93 spinlock_t lock; /* Lock for SMP */
94 short rdtodo; /* Bytes still to read */
95 unsigned char wrbuf[5*64]; /* Buffer for collecting data to write */
96 short wrfilled; /* Overall data size we already got */
97 short wrsent; /* Data already sent */
98};
99
100static int cyberjack_port_probe(struct usb_serial_port *port)
101{
102 struct cyberjack_private *priv;
103 int result;
104
105 priv = kmalloc(sizeof(struct cyberjack_private), GFP_KERNEL);
106 if (!priv)
107 return -ENOMEM;
108
109 spin_lock_init(&priv->lock);
110 priv->rdtodo = 0;
111 priv->wrfilled = 0;
112 priv->wrsent = 0;
113
114 usb_set_serial_port_data(port, priv);
115
116 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
117 if (result)
118 dev_err(&port->dev, "usb_submit_urb(read int) failed\n");
119
120 return 0;
121}
122
123static int cyberjack_port_remove(struct usb_serial_port *port)
124{
125 struct cyberjack_private *priv;
126
127 usb_kill_urb(port->interrupt_in_urb);
128
129 priv = usb_get_serial_port_data(port);
130 kfree(priv);
131
132 return 0;
133}
134
135static int cyberjack_open(struct tty_struct *tty,
136 struct usb_serial_port *port)
137{
138 struct cyberjack_private *priv;
139 unsigned long flags;
140
141 dev_dbg(&port->dev, "%s - usb_clear_halt\n", __func__);
142 usb_clear_halt(port->serial->dev, port->write_urb->pipe);
143
144 priv = usb_get_serial_port_data(port);
145 spin_lock_irqsave(&priv->lock, flags);
146 priv->rdtodo = 0;
147 priv->wrfilled = 0;
148 priv->wrsent = 0;
149 spin_unlock_irqrestore(&priv->lock, flags);
150
151 return 0;
152}
153
154static void cyberjack_close(struct usb_serial_port *port)
155{
156 usb_kill_urb(port->write_urb);
157 usb_kill_urb(port->read_urb);
158}
159
160static int cyberjack_write(struct tty_struct *tty,
161 struct usb_serial_port *port, const unsigned char *buf, int count)
162{
163 struct device *dev = &port->dev;
164 struct cyberjack_private *priv = usb_get_serial_port_data(port);
165 unsigned long flags;
166 int result;
167 int wrexpected;
168
169 if (count == 0) {
170 dev_dbg(dev, "%s - write request of 0 bytes\n", __func__);
171 return 0;
172 }
173
174 if (!test_and_clear_bit(0, &port->write_urbs_free)) {
175 dev_dbg(dev, "%s - already writing\n", __func__);
176 return 0;
177 }
178
179 spin_lock_irqsave(&priv->lock, flags);
180
181 if (count+priv->wrfilled > sizeof(priv->wrbuf)) {
182 /* To much data for buffer. Reset buffer. */
183 priv->wrfilled = 0;
184 spin_unlock_irqrestore(&priv->lock, flags);
185 set_bit(0, &port->write_urbs_free);
186 return 0;
187 }
188
189 /* Copy data */
190 memcpy(priv->wrbuf + priv->wrfilled, buf, count);
191
192 usb_serial_debug_data(dev, __func__, count, priv->wrbuf + priv->wrfilled);
193 priv->wrfilled += count;
194
195 if (priv->wrfilled >= 3) {
196 wrexpected = ((int)priv->wrbuf[2]<<8)+priv->wrbuf[1]+3;
197 dev_dbg(dev, "%s - expected data: %d\n", __func__, wrexpected);
198 } else
199 wrexpected = sizeof(priv->wrbuf);
200
201 if (priv->wrfilled >= wrexpected) {
202 /* We have enough data to begin transmission */
203 int length;
204
205 dev_dbg(dev, "%s - transmitting data (frame 1)\n", __func__);
206 length = (wrexpected > port->bulk_out_size) ?
207 port->bulk_out_size : wrexpected;
208
209 memcpy(port->write_urb->transfer_buffer, priv->wrbuf, length);
210 priv->wrsent = length;
211
212 /* set up our urb */
213 port->write_urb->transfer_buffer_length = length;
214
215 /* send the data out the bulk port */
216 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
217 if (result) {
218 dev_err(&port->dev,
219 "%s - failed submitting write urb, error %d\n",
220 __func__, result);
221 /* Throw away data. No better idea what to do with it. */
222 priv->wrfilled = 0;
223 priv->wrsent = 0;
224 spin_unlock_irqrestore(&priv->lock, flags);
225 set_bit(0, &port->write_urbs_free);
226 return 0;
227 }
228
229 dev_dbg(dev, "%s - priv->wrsent=%d\n", __func__, priv->wrsent);
230 dev_dbg(dev, "%s - priv->wrfilled=%d\n", __func__, priv->wrfilled);
231
232 if (priv->wrsent >= priv->wrfilled) {
233 dev_dbg(dev, "%s - buffer cleaned\n", __func__);
234 memset(priv->wrbuf, 0, sizeof(priv->wrbuf));
235 priv->wrfilled = 0;
236 priv->wrsent = 0;
237 }
238 }
239
240 spin_unlock_irqrestore(&priv->lock, flags);
241
242 return count;
243}
244
245static int cyberjack_write_room(struct tty_struct *tty)
246{
247 /* FIXME: .... */
248 return CYBERJACK_LOCAL_BUF_SIZE;
249}
250
251static void cyberjack_read_int_callback(struct urb *urb)
252{
253 struct usb_serial_port *port = urb->context;
254 struct cyberjack_private *priv = usb_get_serial_port_data(port);
255 struct device *dev = &port->dev;
256 unsigned char *data = urb->transfer_buffer;
257 int status = urb->status;
258 unsigned long flags;
259 int result;
260
261 /* the urb might have been killed. */
262 if (status)
263 return;
264
265 usb_serial_debug_data(dev, __func__, urb->actual_length, data);
266
267 /* React only to interrupts signaling a bulk_in transfer */
268 if (urb->actual_length == 4 && data[0] == 0x01) {
269 short old_rdtodo;
270
271 /* This is a announcement of coming bulk_ins. */
272 unsigned short size = ((unsigned short)data[3]<<8)+data[2]+3;
273
274 spin_lock_irqsave(&priv->lock, flags);
275
276 old_rdtodo = priv->rdtodo;
277
278 if (old_rdtodo > SHRT_MAX - size) {
279 dev_dbg(dev, "Too many bulk_in urbs to do.\n");
280 spin_unlock_irqrestore(&priv->lock, flags);
281 goto resubmit;
282 }
283
284 /* "+=" is probably more fault tolerant than "=" */
285 priv->rdtodo += size;
286
287 dev_dbg(dev, "%s - rdtodo: %d\n", __func__, priv->rdtodo);
288
289 spin_unlock_irqrestore(&priv->lock, flags);
290
291 if (!old_rdtodo) {
292 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
293 if (result)
294 dev_err(dev, "%s - failed resubmitting read urb, error %d\n",
295 __func__, result);
296 dev_dbg(dev, "%s - usb_submit_urb(read urb)\n", __func__);
297 }
298 }
299
300resubmit:
301 result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
302 if (result)
303 dev_err(&port->dev, "usb_submit_urb(read int) failed\n");
304 dev_dbg(dev, "%s - usb_submit_urb(int urb)\n", __func__);
305}
306
307static void cyberjack_read_bulk_callback(struct urb *urb)
308{
309 struct usb_serial_port *port = urb->context;
310 struct cyberjack_private *priv = usb_get_serial_port_data(port);
311 struct device *dev = &port->dev;
312 unsigned char *data = urb->transfer_buffer;
313 unsigned long flags;
314 short todo;
315 int result;
316 int status = urb->status;
317
318 usb_serial_debug_data(dev, __func__, urb->actual_length, data);
319 if (status) {
320 dev_dbg(dev, "%s - nonzero read bulk status received: %d\n",
321 __func__, status);
322 return;
323 }
324
325 if (urb->actual_length) {
326 tty_insert_flip_string(&port->port, data, urb->actual_length);
327 tty_flip_buffer_push(&port->port);
328 }
329
330 spin_lock_irqsave(&priv->lock, flags);
331
332 /* Reduce urbs to do by one. */
333 priv->rdtodo -= urb->actual_length;
334 /* Just to be sure */
335 if (priv->rdtodo < 0)
336 priv->rdtodo = 0;
337 todo = priv->rdtodo;
338
339 spin_unlock_irqrestore(&priv->lock, flags);
340
341 dev_dbg(dev, "%s - rdtodo: %d\n", __func__, todo);
342
343 /* Continue to read if we have still urbs to do. */
344 if (todo /* || (urb->actual_length==port->bulk_in_endpointAddress)*/) {
345 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
346 if (result)
347 dev_err(dev, "%s - failed resubmitting read urb, error %d\n",
348 __func__, result);
349 dev_dbg(dev, "%s - usb_submit_urb(read urb)\n", __func__);
350 }
351}
352
353static void cyberjack_write_bulk_callback(struct urb *urb)
354{
355 struct usb_serial_port *port = urb->context;
356 struct cyberjack_private *priv = usb_get_serial_port_data(port);
357 struct device *dev = &port->dev;
358 int status = urb->status;
359 unsigned long flags;
360
361 set_bit(0, &port->write_urbs_free);
362 if (status) {
363 dev_dbg(dev, "%s - nonzero write bulk status received: %d\n",
364 __func__, status);
365 return;
366 }
367
368 spin_lock_irqsave(&priv->lock, flags);
369
370 /* only do something if we have more data to send */
371 if (priv->wrfilled) {
372 int length, blksize, result;
373
374 dev_dbg(dev, "%s - transmitting data (frame n)\n", __func__);
375
376 length = ((priv->wrfilled - priv->wrsent) > port->bulk_out_size) ?
377 port->bulk_out_size : (priv->wrfilled - priv->wrsent);
378
379 memcpy(port->write_urb->transfer_buffer,
380 priv->wrbuf + priv->wrsent, length);
381 priv->wrsent += length;
382
383 /* set up our urb */
384 port->write_urb->transfer_buffer_length = length;
385
386 /* send the data out the bulk port */
387 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
388 if (result) {
389 dev_err(dev, "%s - failed submitting write urb, error %d\n",
390 __func__, result);
391 /* Throw away data. No better idea what to do with it. */
392 priv->wrfilled = 0;
393 priv->wrsent = 0;
394 goto exit;
395 }
396
397 dev_dbg(dev, "%s - priv->wrsent=%d\n", __func__, priv->wrsent);
398 dev_dbg(dev, "%s - priv->wrfilled=%d\n", __func__, priv->wrfilled);
399
400 blksize = ((int)priv->wrbuf[2]<<8)+priv->wrbuf[1]+3;
401
402 if (priv->wrsent >= priv->wrfilled ||
403 priv->wrsent >= blksize) {
404 dev_dbg(dev, "%s - buffer cleaned\n", __func__);
405 memset(priv->wrbuf, 0, sizeof(priv->wrbuf));
406 priv->wrfilled = 0;
407 priv->wrsent = 0;
408 }
409 }
410
411exit:
412 spin_unlock_irqrestore(&priv->lock, flags);
413 usb_serial_port_softint(port);
414}
415
416module_usb_serial_driver(serial_drivers, id_table);
417
418MODULE_AUTHOR(DRIVER_AUTHOR);
419MODULE_DESCRIPTION(DRIVER_DESC);
420MODULE_LICENSE("GPL");
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");