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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/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_port_probe(struct usb_serial_port *port);
54static int cyberjack_port_remove(struct usb_serial_port *port);
55static int cyberjack_open(struct tty_struct *tty,
56 struct usb_serial_port *port);
57static void cyberjack_close(struct usb_serial_port *port);
58static int cyberjack_write(struct tty_struct *tty,
59 struct usb_serial_port *port, const unsigned char *buf, int count);
60static int cyberjack_write_room(struct tty_struct *tty);
61static void cyberjack_read_int_callback(struct urb *urb);
62static void cyberjack_read_bulk_callback(struct urb *urb);
63static void cyberjack_write_bulk_callback(struct urb *urb);
64
65static const struct usb_device_id id_table[] = {
66 { USB_DEVICE(CYBERJACK_VENDOR_ID, CYBERJACK_PRODUCT_ID) },
67 { } /* Terminating entry */
68};
69
70MODULE_DEVICE_TABLE(usb, id_table);
71
72static struct usb_serial_driver cyberjack_device = {
73 .driver = {
74 .owner = THIS_MODULE,
75 .name = "cyberjack",
76 },
77 .description = "Reiner SCT Cyberjack USB card reader",
78 .id_table = id_table,
79 .num_ports = 1,
80 .port_probe = cyberjack_port_probe,
81 .port_remove = cyberjack_port_remove,
82 .open = cyberjack_open,
83 .close = cyberjack_close,
84 .write = cyberjack_write,
85 .write_room = cyberjack_write_room,
86 .read_int_callback = cyberjack_read_int_callback,
87 .read_bulk_callback = cyberjack_read_bulk_callback,
88 .write_bulk_callback = cyberjack_write_bulk_callback,
89};
90
91static struct usb_serial_driver * const serial_drivers[] = {
92 &cyberjack_device, NULL
93};
94
95struct cyberjack_private {
96 spinlock_t lock; /* Lock for SMP */
97 short rdtodo; /* Bytes still to read */
98 unsigned char wrbuf[5*64]; /* Buffer for collecting data to write */
99 short wrfilled; /* Overall data size we already got */
100 short wrsent; /* Data already sent */
101};
102
103static int cyberjack_port_probe(struct usb_serial_port *port)
104{
105 struct cyberjack_private *priv;
106 int result;
107
108 priv = kmalloc(sizeof(struct cyberjack_private), GFP_KERNEL);
109 if (!priv)
110 return -ENOMEM;
111
112 spin_lock_init(&priv->lock);
113 priv->rdtodo = 0;
114 priv->wrfilled = 0;
115 priv->wrsent = 0;
116
117 usb_set_serial_port_data(port, priv);
118
119 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
120 if (result)
121 dev_err(&port->dev, "usb_submit_urb(read int) failed\n");
122
123 return 0;
124}
125
126static int cyberjack_port_remove(struct usb_serial_port *port)
127{
128 struct cyberjack_private *priv;
129
130 usb_kill_urb(port->interrupt_in_urb);
131
132 priv = usb_get_serial_port_data(port);
133 kfree(priv);
134
135 return 0;
136}
137
138static int cyberjack_open(struct tty_struct *tty,
139 struct usb_serial_port *port)
140{
141 struct cyberjack_private *priv;
142 unsigned long flags;
143
144 dev_dbg(&port->dev, "%s - usb_clear_halt\n", __func__);
145 usb_clear_halt(port->serial->dev, port->write_urb->pipe);
146
147 priv = usb_get_serial_port_data(port);
148 spin_lock_irqsave(&priv->lock, flags);
149 priv->rdtodo = 0;
150 priv->wrfilled = 0;
151 priv->wrsent = 0;
152 spin_unlock_irqrestore(&priv->lock, flags);
153
154 return 0;
155}
156
157static void cyberjack_close(struct usb_serial_port *port)
158{
159 usb_kill_urb(port->write_urb);
160 usb_kill_urb(port->read_urb);
161}
162
163static int cyberjack_write(struct tty_struct *tty,
164 struct usb_serial_port *port, const unsigned char *buf, int count)
165{
166 struct device *dev = &port->dev;
167 struct cyberjack_private *priv = usb_get_serial_port_data(port);
168 unsigned long flags;
169 int result;
170 int wrexpected;
171
172 if (count == 0) {
173 dev_dbg(dev, "%s - write request of 0 bytes\n", __func__);
174 return 0;
175 }
176
177 if (!test_and_clear_bit(0, &port->write_urbs_free)) {
178 dev_dbg(dev, "%s - already writing\n", __func__);
179 return 0;
180 }
181
182 spin_lock_irqsave(&priv->lock, flags);
183
184 if (count+priv->wrfilled > sizeof(priv->wrbuf)) {
185 /* To much data for buffer. Reset buffer. */
186 priv->wrfilled = 0;
187 spin_unlock_irqrestore(&priv->lock, flags);
188 set_bit(0, &port->write_urbs_free);
189 return 0;
190 }
191
192 /* Copy data */
193 memcpy(priv->wrbuf + priv->wrfilled, buf, count);
194
195 usb_serial_debug_data(dev, __func__, count, priv->wrbuf + priv->wrfilled);
196 priv->wrfilled += count;
197
198 if (priv->wrfilled >= 3) {
199 wrexpected = ((int)priv->wrbuf[2]<<8)+priv->wrbuf[1]+3;
200 dev_dbg(dev, "%s - expected data: %d\n", __func__, wrexpected);
201 } else
202 wrexpected = sizeof(priv->wrbuf);
203
204 if (priv->wrfilled >= wrexpected) {
205 /* We have enough data to begin transmission */
206 int length;
207
208 dev_dbg(dev, "%s - transmitting data (frame 1)\n", __func__);
209 length = (wrexpected > port->bulk_out_size) ?
210 port->bulk_out_size : wrexpected;
211
212 memcpy(port->write_urb->transfer_buffer, priv->wrbuf, length);
213 priv->wrsent = length;
214
215 /* set up our urb */
216 port->write_urb->transfer_buffer_length = length;
217
218 /* send the data out the bulk port */
219 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
220 if (result) {
221 dev_err(&port->dev,
222 "%s - failed submitting write urb, error %d\n",
223 __func__, result);
224 /* Throw away data. No better idea what to do with it. */
225 priv->wrfilled = 0;
226 priv->wrsent = 0;
227 spin_unlock_irqrestore(&priv->lock, flags);
228 set_bit(0, &port->write_urbs_free);
229 return 0;
230 }
231
232 dev_dbg(dev, "%s - priv->wrsent=%d\n", __func__, priv->wrsent);
233 dev_dbg(dev, "%s - priv->wrfilled=%d\n", __func__, priv->wrfilled);
234
235 if (priv->wrsent >= priv->wrfilled) {
236 dev_dbg(dev, "%s - buffer cleaned\n", __func__);
237 memset(priv->wrbuf, 0, sizeof(priv->wrbuf));
238 priv->wrfilled = 0;
239 priv->wrsent = 0;
240 }
241 }
242
243 spin_unlock_irqrestore(&priv->lock, flags);
244
245 return count;
246}
247
248static int cyberjack_write_room(struct tty_struct *tty)
249{
250 /* FIXME: .... */
251 return CYBERJACK_LOCAL_BUF_SIZE;
252}
253
254static void cyberjack_read_int_callback(struct urb *urb)
255{
256 struct usb_serial_port *port = urb->context;
257 struct cyberjack_private *priv = usb_get_serial_port_data(port);
258 struct device *dev = &port->dev;
259 unsigned char *data = urb->transfer_buffer;
260 int status = urb->status;
261 int result;
262
263 /* the urb might have been killed. */
264 if (status)
265 return;
266
267 usb_serial_debug_data(dev, __func__, urb->actual_length, data);
268
269 /* React only to interrupts signaling a bulk_in transfer */
270 if (urb->actual_length == 4 && data[0] == 0x01) {
271 short old_rdtodo;
272
273 /* This is a announcement of coming bulk_ins. */
274 unsigned short size = ((unsigned short)data[3]<<8)+data[2]+3;
275
276 spin_lock(&priv->lock);
277
278 old_rdtodo = priv->rdtodo;
279
280 if (old_rdtodo > SHRT_MAX - size) {
281 dev_dbg(dev, "To many bulk_in urbs to do.\n");
282 spin_unlock(&priv->lock);
283 goto resubmit;
284 }
285
286 /* "+=" is probably more fault tolerant than "=" */
287 priv->rdtodo += size;
288
289 dev_dbg(dev, "%s - rdtodo: %d\n", __func__, priv->rdtodo);
290
291 spin_unlock(&priv->lock);
292
293 if (!old_rdtodo) {
294 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
295 if (result)
296 dev_err(dev, "%s - failed resubmitting read urb, error %d\n",
297 __func__, result);
298 dev_dbg(dev, "%s - usb_submit_urb(read urb)\n", __func__);
299 }
300 }
301
302resubmit:
303 result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
304 if (result)
305 dev_err(&port->dev, "usb_submit_urb(read int) failed\n");
306 dev_dbg(dev, "%s - usb_submit_urb(int urb)\n", __func__);
307}
308
309static void cyberjack_read_bulk_callback(struct urb *urb)
310{
311 struct usb_serial_port *port = urb->context;
312 struct cyberjack_private *priv = usb_get_serial_port_data(port);
313 struct device *dev = &port->dev;
314 unsigned char *data = urb->transfer_buffer;
315 short todo;
316 int result;
317 int status = urb->status;
318
319 usb_serial_debug_data(dev, __func__, urb->actual_length, data);
320 if (status) {
321 dev_dbg(dev, "%s - nonzero read bulk status received: %d\n",
322 __func__, status);
323 return;
324 }
325
326 if (urb->actual_length) {
327 tty_insert_flip_string(&port->port, data, urb->actual_length);
328 tty_flip_buffer_push(&port->port);
329 }
330
331 spin_lock(&priv->lock);
332
333 /* Reduce urbs to do by one. */
334 priv->rdtodo -= urb->actual_length;
335 /* Just to be sure */
336 if (priv->rdtodo < 0)
337 priv->rdtodo = 0;
338 todo = priv->rdtodo;
339
340 spin_unlock(&priv->lock);
341
342 dev_dbg(dev, "%s - rdtodo: %d\n", __func__, todo);
343
344 /* Continue to read if we have still urbs to do. */
345 if (todo /* || (urb->actual_length==port->bulk_in_endpointAddress)*/) {
346 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
347 if (result)
348 dev_err(dev, "%s - failed resubmitting read urb, error %d\n",
349 __func__, result);
350 dev_dbg(dev, "%s - usb_submit_urb(read urb)\n", __func__);
351 }
352}
353
354static void cyberjack_write_bulk_callback(struct urb *urb)
355{
356 struct usb_serial_port *port = urb->context;
357 struct cyberjack_private *priv = usb_get_serial_port_data(port);
358 struct device *dev = &port->dev;
359 int status = urb->status;
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(&priv->lock);
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(&priv->lock);
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_port_probe(struct usb_serial_port *port);
54static int cyberjack_port_remove(struct usb_serial_port *port);
55static int cyberjack_open(struct tty_struct *tty,
56 struct usb_serial_port *port);
57static void cyberjack_close(struct usb_serial_port *port);
58static int cyberjack_write(struct tty_struct *tty,
59 struct usb_serial_port *port, const unsigned char *buf, int count);
60static int cyberjack_write_room(struct tty_struct *tty);
61static void cyberjack_read_int_callback(struct urb *urb);
62static void cyberjack_read_bulk_callback(struct urb *urb);
63static void cyberjack_write_bulk_callback(struct urb *urb);
64
65static const struct usb_device_id id_table[] = {
66 { USB_DEVICE(CYBERJACK_VENDOR_ID, CYBERJACK_PRODUCT_ID) },
67 { } /* Terminating entry */
68};
69
70MODULE_DEVICE_TABLE(usb, id_table);
71
72static struct usb_serial_driver cyberjack_device = {
73 .driver = {
74 .owner = THIS_MODULE,
75 .name = "cyberjack",
76 },
77 .description = "Reiner SCT Cyberjack USB card reader",
78 .id_table = id_table,
79 .num_ports = 1,
80 .port_probe = cyberjack_port_probe,
81 .port_remove = cyberjack_port_remove,
82 .open = cyberjack_open,
83 .close = cyberjack_close,
84 .write = cyberjack_write,
85 .write_room = cyberjack_write_room,
86 .read_int_callback = cyberjack_read_int_callback,
87 .read_bulk_callback = cyberjack_read_bulk_callback,
88 .write_bulk_callback = cyberjack_write_bulk_callback,
89};
90
91static struct usb_serial_driver * const serial_drivers[] = {
92 &cyberjack_device, NULL
93};
94
95struct cyberjack_private {
96 spinlock_t lock; /* Lock for SMP */
97 short rdtodo; /* Bytes still to read */
98 unsigned char wrbuf[5*64]; /* Buffer for collecting data to write */
99 short wrfilled; /* Overall data size we already got */
100 short wrsent; /* Data already sent */
101};
102
103static int cyberjack_port_probe(struct usb_serial_port *port)
104{
105 struct cyberjack_private *priv;
106 int result;
107
108 priv = kmalloc(sizeof(struct cyberjack_private), GFP_KERNEL);
109 if (!priv)
110 return -ENOMEM;
111
112 spin_lock_init(&priv->lock);
113 priv->rdtodo = 0;
114 priv->wrfilled = 0;
115 priv->wrsent = 0;
116
117 usb_set_serial_port_data(port, priv);
118
119 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
120 if (result)
121 dev_err(&port->dev, "usb_submit_urb(read int) failed\n");
122
123 return 0;
124}
125
126static int cyberjack_port_remove(struct usb_serial_port *port)
127{
128 struct cyberjack_private *priv;
129
130 usb_kill_urb(port->interrupt_in_urb);
131
132 priv = usb_get_serial_port_data(port);
133 kfree(priv);
134
135 return 0;
136}
137
138static int cyberjack_open(struct tty_struct *tty,
139 struct usb_serial_port *port)
140{
141 struct cyberjack_private *priv;
142 unsigned long flags;
143 int result = 0;
144
145 dev_dbg(&port->dev, "%s - usb_clear_halt\n", __func__);
146 usb_clear_halt(port->serial->dev, port->write_urb->pipe);
147
148 priv = usb_get_serial_port_data(port);
149 spin_lock_irqsave(&priv->lock, flags);
150 priv->rdtodo = 0;
151 priv->wrfilled = 0;
152 priv->wrsent = 0;
153 spin_unlock_irqrestore(&priv->lock, flags);
154
155 return result;
156}
157
158static void cyberjack_close(struct usb_serial_port *port)
159{
160 usb_kill_urb(port->write_urb);
161 usb_kill_urb(port->read_urb);
162}
163
164static int cyberjack_write(struct tty_struct *tty,
165 struct usb_serial_port *port, const unsigned char *buf, int count)
166{
167 struct device *dev = &port->dev;
168 struct cyberjack_private *priv = usb_get_serial_port_data(port);
169 unsigned long flags;
170 int result;
171 int wrexpected;
172
173 if (count == 0) {
174 dev_dbg(dev, "%s - write request of 0 bytes\n", __func__);
175 return 0;
176 }
177
178 if (!test_and_clear_bit(0, &port->write_urbs_free)) {
179 dev_dbg(dev, "%s - already writing\n", __func__);
180 return 0;
181 }
182
183 spin_lock_irqsave(&priv->lock, flags);
184
185 if (count+priv->wrfilled > sizeof(priv->wrbuf)) {
186 /* To much data for buffer. Reset buffer. */
187 priv->wrfilled = 0;
188 spin_unlock_irqrestore(&priv->lock, flags);
189 set_bit(0, &port->write_urbs_free);
190 return 0;
191 }
192
193 /* Copy data */
194 memcpy(priv->wrbuf + priv->wrfilled, buf, count);
195
196 usb_serial_debug_data(dev, __func__, count, priv->wrbuf + priv->wrfilled);
197 priv->wrfilled += count;
198
199 if (priv->wrfilled >= 3) {
200 wrexpected = ((int)priv->wrbuf[2]<<8)+priv->wrbuf[1]+3;
201 dev_dbg(dev, "%s - expected data: %d\n", __func__, wrexpected);
202 } else
203 wrexpected = sizeof(priv->wrbuf);
204
205 if (priv->wrfilled >= wrexpected) {
206 /* We have enough data to begin transmission */
207 int length;
208
209 dev_dbg(dev, "%s - transmitting data (frame 1)\n", __func__);
210 length = (wrexpected > port->bulk_out_size) ?
211 port->bulk_out_size : wrexpected;
212
213 memcpy(port->write_urb->transfer_buffer, priv->wrbuf, length);
214 priv->wrsent = length;
215
216 /* set up our urb */
217 port->write_urb->transfer_buffer_length = length;
218
219 /* send the data out the bulk port */
220 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
221 if (result) {
222 dev_err(&port->dev,
223 "%s - failed submitting write urb, error %d\n",
224 __func__, result);
225 /* Throw away data. No better idea what to do with it. */
226 priv->wrfilled = 0;
227 priv->wrsent = 0;
228 spin_unlock_irqrestore(&priv->lock, flags);
229 set_bit(0, &port->write_urbs_free);
230 return 0;
231 }
232
233 dev_dbg(dev, "%s - priv->wrsent=%d\n", __func__, priv->wrsent);
234 dev_dbg(dev, "%s - priv->wrfilled=%d\n", __func__, priv->wrfilled);
235
236 if (priv->wrsent >= priv->wrfilled) {
237 dev_dbg(dev, "%s - buffer cleaned\n", __func__);
238 memset(priv->wrbuf, 0, sizeof(priv->wrbuf));
239 priv->wrfilled = 0;
240 priv->wrsent = 0;
241 }
242 }
243
244 spin_unlock_irqrestore(&priv->lock, flags);
245
246 return count;
247}
248
249static int cyberjack_write_room(struct tty_struct *tty)
250{
251 /* FIXME: .... */
252 return CYBERJACK_LOCAL_BUF_SIZE;
253}
254
255static void cyberjack_read_int_callback(struct urb *urb)
256{
257 struct usb_serial_port *port = urb->context;
258 struct cyberjack_private *priv = usb_get_serial_port_data(port);
259 struct device *dev = &port->dev;
260 unsigned char *data = urb->transfer_buffer;
261 int status = urb->status;
262 int result;
263
264 /* the urb might have been killed. */
265 if (status)
266 return;
267
268 usb_serial_debug_data(dev, __func__, urb->actual_length, data);
269
270 /* React only to interrupts signaling a bulk_in transfer */
271 if (urb->actual_length == 4 && data[0] == 0x01) {
272 short old_rdtodo;
273
274 /* This is a announcement of coming bulk_ins. */
275 unsigned short size = ((unsigned short)data[3]<<8)+data[2]+3;
276
277 spin_lock(&priv->lock);
278
279 old_rdtodo = priv->rdtodo;
280
281 if (old_rdtodo > SHRT_MAX - size) {
282 dev_dbg(dev, "To many bulk_in urbs to do.\n");
283 spin_unlock(&priv->lock);
284 goto resubmit;
285 }
286
287 /* "+=" is probably more fault tolerant than "=" */
288 priv->rdtodo += size;
289
290 dev_dbg(dev, "%s - rdtodo: %d\n", __func__, priv->rdtodo);
291
292 spin_unlock(&priv->lock);
293
294 if (!old_rdtodo) {
295 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
296 if (result)
297 dev_err(dev, "%s - failed resubmitting read urb, error %d\n",
298 __func__, result);
299 dev_dbg(dev, "%s - usb_submit_urb(read urb)\n", __func__);
300 }
301 }
302
303resubmit:
304 result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
305 if (result)
306 dev_err(&port->dev, "usb_submit_urb(read int) failed\n");
307 dev_dbg(dev, "%s - usb_submit_urb(int urb)\n", __func__);
308}
309
310static void cyberjack_read_bulk_callback(struct urb *urb)
311{
312 struct usb_serial_port *port = urb->context;
313 struct cyberjack_private *priv = usb_get_serial_port_data(port);
314 struct device *dev = &port->dev;
315 unsigned char *data = urb->transfer_buffer;
316 short todo;
317 int result;
318 int status = urb->status;
319
320 usb_serial_debug_data(dev, __func__, urb->actual_length, data);
321 if (status) {
322 dev_dbg(dev, "%s - nonzero read bulk status received: %d\n",
323 __func__, status);
324 return;
325 }
326
327 if (urb->actual_length) {
328 tty_insert_flip_string(&port->port, data, urb->actual_length);
329 tty_flip_buffer_push(&port->port);
330 }
331
332 spin_lock(&priv->lock);
333
334 /* Reduce urbs to do by one. */
335 priv->rdtodo -= urb->actual_length;
336 /* Just to be sure */
337 if (priv->rdtodo < 0)
338 priv->rdtodo = 0;
339 todo = priv->rdtodo;
340
341 spin_unlock(&priv->lock);
342
343 dev_dbg(dev, "%s - rdtodo: %d\n", __func__, todo);
344
345 /* Continue to read if we have still urbs to do. */
346 if (todo /* || (urb->actual_length==port->bulk_in_endpointAddress)*/) {
347 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
348 if (result)
349 dev_err(dev, "%s - failed resubmitting read urb, error %d\n",
350 __func__, result);
351 dev_dbg(dev, "%s - usb_submit_urb(read urb)\n", __func__);
352 }
353}
354
355static void cyberjack_write_bulk_callback(struct urb *urb)
356{
357 struct usb_serial_port *port = urb->context;
358 struct cyberjack_private *priv = usb_get_serial_port_data(port);
359 struct device *dev = &port->dev;
360 int status = urb->status;
361
362 set_bit(0, &port->write_urbs_free);
363 if (status) {
364 dev_dbg(dev, "%s - nonzero write bulk status received: %d\n",
365 __func__, status);
366 return;
367 }
368
369 spin_lock(&priv->lock);
370
371 /* only do something if we have more data to send */
372 if (priv->wrfilled) {
373 int length, blksize, result;
374
375 dev_dbg(dev, "%s - transmitting data (frame n)\n", __func__);
376
377 length = ((priv->wrfilled - priv->wrsent) > port->bulk_out_size) ?
378 port->bulk_out_size : (priv->wrfilled - priv->wrsent);
379
380 memcpy(port->write_urb->transfer_buffer,
381 priv->wrbuf + priv->wrsent, length);
382 priv->wrsent += length;
383
384 /* set up our urb */
385 port->write_urb->transfer_buffer_length = length;
386
387 /* send the data out the bulk port */
388 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
389 if (result) {
390 dev_err(dev, "%s - failed submitting write urb, error %d\n",
391 __func__, result);
392 /* Throw away data. No better idea what to do with it. */
393 priv->wrfilled = 0;
394 priv->wrsent = 0;
395 goto exit;
396 }
397
398 dev_dbg(dev, "%s - priv->wrsent=%d\n", __func__, priv->wrsent);
399 dev_dbg(dev, "%s - priv->wrfilled=%d\n", __func__, priv->wrfilled);
400
401 blksize = ((int)priv->wrbuf[2]<<8)+priv->wrbuf[1]+3;
402
403 if (priv->wrsent >= priv->wrfilled ||
404 priv->wrsent >= blksize) {
405 dev_dbg(dev, "%s - buffer cleaned\n", __func__);
406 memset(priv->wrbuf, 0, sizeof(priv->wrbuf));
407 priv->wrfilled = 0;
408 priv->wrsent = 0;
409 }
410 }
411
412exit:
413 spin_unlock(&priv->lock);
414 usb_serial_port_softint(port);
415}
416
417module_usb_serial_driver(serial_drivers, id_table);
418
419MODULE_AUTHOR(DRIVER_AUTHOR);
420MODULE_DESCRIPTION(DRIVER_DESC);
421MODULE_LICENSE("GPL");