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39#include <linux/kernel.h>
40#include <linux/errno.h>
41#include <linux/init.h>
42#include <linux/slab.h>
43#include <linux/tty.h>
44#include <linux/tty_driver.h>
45#include <linux/tty_flip.h>
46#include <linux/module.h>
47#include <linux/spinlock.h>
48#include <linux/uaccess.h>
49#include <linux/usb.h>
50#include <linux/usb/serial.h>
51
52static int debug;
53
54
55
56
57#define DRIVER_VERSION "v1.1"
58#define DRIVER_AUTHOR "Alessandro Zummo"
59#define DRIVER_DESC "USB ZyXEL omni.net LCD PLUS Driver"
60
61#define ZYXEL_VENDOR_ID 0x0586
62#define ZYXEL_OMNINET_ID 0x1000
63
64#define BT_IGNITIONPRO_ID 0x2000
65
66
67static int omninet_open(struct tty_struct *tty, struct usb_serial_port *port);
68static void omninet_close(struct usb_serial_port *port);
69static void omninet_read_bulk_callback(struct urb *urb);
70static void omninet_write_bulk_callback(struct urb *urb);
71static int omninet_write(struct tty_struct *tty, struct usb_serial_port *port,
72 const unsigned char *buf, int count);
73static int omninet_write_room(struct tty_struct *tty);
74static void omninet_disconnect(struct usb_serial *serial);
75static void omninet_release(struct usb_serial *serial);
76static int omninet_attach(struct usb_serial *serial);
77
78static struct usb_device_id id_table[] = {
79 { USB_DEVICE(ZYXEL_VENDOR_ID, ZYXEL_OMNINET_ID) },
80 { USB_DEVICE(ZYXEL_VENDOR_ID, BT_IGNITIONPRO_ID) },
81 { }
82};
83
84MODULE_DEVICE_TABLE(usb, id_table);
85
86static struct usb_driver omninet_driver = {
87 .name = "omninet",
88 .probe = usb_serial_probe,
89 .disconnect = usb_serial_disconnect,
90 .id_table = id_table,
91 .no_dynamic_id = 1,
92};
93
94
95static struct usb_serial_driver zyxel_omninet_device = {
96 .driver = {
97 .owner = THIS_MODULE,
98 .name = "omninet",
99 },
100 .description = "ZyXEL - omni.net lcd plus usb",
101 .usb_driver = &omninet_driver,
102 .id_table = id_table,
103 .num_ports = 1,
104 .attach = omninet_attach,
105 .open = omninet_open,
106 .close = omninet_close,
107 .write = omninet_write,
108 .write_room = omninet_write_room,
109 .read_bulk_callback = omninet_read_bulk_callback,
110 .write_bulk_callback = omninet_write_bulk_callback,
111 .disconnect = omninet_disconnect,
112 .release = omninet_release,
113};
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139struct omninet_header {
140 __u8 oh_seq;
141 __u8 oh_len;
142 __u8 oh_xxx;
143 __u8 oh_pad;
144};
145
146struct omninet_data {
147 __u8 od_outseq;
148};
149
150static int omninet_attach(struct usb_serial *serial)
151{
152 struct omninet_data *od;
153 struct usb_serial_port *port = serial->port[0];
154
155 od = kmalloc(sizeof(struct omninet_data), GFP_KERNEL);
156 if (!od) {
157 dev_err(&port->dev, "%s- kmalloc(%Zd) failed.\n",
158 __func__, sizeof(struct omninet_data));
159 return -ENOMEM;
160 }
161 usb_set_serial_port_data(port, od);
162 return 0;
163}
164
165static int omninet_open(struct tty_struct *tty, struct usb_serial_port *port)
166{
167 struct usb_serial *serial = port->serial;
168 struct usb_serial_port *wport;
169 int result = 0;
170
171 dbg("%s - port %d", __func__, port->number);
172
173 wport = serial->port[1];
174 tty_port_tty_set(&wport->port, tty);
175
176
177 usb_fill_bulk_urb(port->read_urb, serial->dev,
178 usb_rcvbulkpipe(serial->dev,
179 port->bulk_in_endpointAddress),
180 port->read_urb->transfer_buffer,
181 port->read_urb->transfer_buffer_length,
182 omninet_read_bulk_callback, port);
183 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
184 if (result)
185 dev_err(&port->dev,
186 "%s - failed submitting read urb, error %d\n",
187 __func__, result);
188 return result;
189}
190
191static void omninet_close(struct usb_serial_port *port)
192{
193 dbg("%s - port %d", __func__, port->number);
194 usb_kill_urb(port->read_urb);
195}
196
197
198#define OMNINET_DATAOFFSET 0x04
199#define OMNINET_HEADERLEN sizeof(struct omninet_header)
200#define OMNINET_BULKOUTSIZE (64 - OMNINET_HEADERLEN)
201
202static void omninet_read_bulk_callback(struct urb *urb)
203{
204 struct usb_serial_port *port = urb->context;
205 unsigned char *data = urb->transfer_buffer;
206 struct omninet_header *header = (struct omninet_header *) &data[0];
207 int status = urb->status;
208 int result;
209 int i;
210
211 dbg("%s - port %d", __func__, port->number);
212
213 if (status) {
214 dbg("%s - nonzero read bulk status received: %d",
215 __func__, status);
216 return;
217 }
218
219 if (debug && header->oh_xxx != 0x30) {
220 if (urb->actual_length) {
221 printk(KERN_DEBUG __FILE__
222 ": omninet_read %d: ", header->oh_len);
223 for (i = 0; i < (header->oh_len +
224 OMNINET_HEADERLEN); i++)
225 printk("%.2x ", data[i]);
226 printk("\n");
227 }
228 }
229
230 if (urb->actual_length && header->oh_len) {
231 struct tty_struct *tty = tty_port_tty_get(&port->port);
232 tty_insert_flip_string(tty, data + OMNINET_DATAOFFSET,
233 header->oh_len);
234 tty_flip_buffer_push(tty);
235 tty_kref_put(tty);
236 }
237
238
239 usb_fill_bulk_urb(urb, port->serial->dev,
240 usb_rcvbulkpipe(port->serial->dev,
241 port->bulk_in_endpointAddress),
242 urb->transfer_buffer, urb->transfer_buffer_length,
243 omninet_read_bulk_callback, port);
244 result = usb_submit_urb(urb, GFP_ATOMIC);
245 if (result)
246 dev_err(&port->dev,
247 "%s - failed resubmitting read urb, error %d\n",
248 __func__, result);
249
250 return;
251}
252
253static int omninet_write(struct tty_struct *tty, struct usb_serial_port *port,
254 const unsigned char *buf, int count)
255{
256 struct usb_serial *serial = port->serial;
257 struct usb_serial_port *wport = serial->port[1];
258
259 struct omninet_data *od = usb_get_serial_port_data(port);
260 struct omninet_header *header = (struct omninet_header *)
261 wport->write_urb->transfer_buffer;
262
263 int result;
264
265 dbg("%s - port %d", __func__, port->number);
266
267 if (count == 0) {
268 dbg("%s - write request of 0 bytes", __func__);
269 return 0;
270 }
271
272 spin_lock_bh(&wport->lock);
273 if (wport->write_urb_busy) {
274 spin_unlock_bh(&wport->lock);
275 dbg("%s - already writing", __func__);
276 return 0;
277 }
278 wport->write_urb_busy = 1;
279 spin_unlock_bh(&wport->lock);
280
281 count = (count > OMNINET_BULKOUTSIZE) ? OMNINET_BULKOUTSIZE : count;
282
283 memcpy(wport->write_urb->transfer_buffer + OMNINET_DATAOFFSET,
284 buf, count);
285
286 usb_serial_debug_data(debug, &port->dev, __func__, count,
287 wport->write_urb->transfer_buffer);
288
289 header->oh_seq = od->od_outseq++;
290 header->oh_len = count;
291 header->oh_xxx = 0x03;
292 header->oh_pad = 0x00;
293
294
295 wport->write_urb->transfer_buffer_length = 64;
296
297 wport->write_urb->dev = serial->dev;
298 result = usb_submit_urb(wport->write_urb, GFP_ATOMIC);
299 if (result) {
300 wport->write_urb_busy = 0;
301 dev_err(&port->dev,
302 "%s - failed submitting write urb, error %d\n",
303 __func__, result);
304 } else
305 result = count;
306
307 return result;
308}
309
310
311static int omninet_write_room(struct tty_struct *tty)
312{
313 struct usb_serial_port *port = tty->driver_data;
314 struct usb_serial *serial = port->serial;
315 struct usb_serial_port *wport = serial->port[1];
316
317 int room = 0;
318
319
320 if (wport->write_urb_busy)
321 room = wport->bulk_out_size - OMNINET_HEADERLEN;
322
323 dbg("%s - returns %d", __func__, room);
324
325 return room;
326}
327
328static void omninet_write_bulk_callback(struct urb *urb)
329{
330
331
332 struct usb_serial_port *port = urb->context;
333 int status = urb->status;
334
335 dbg("%s - port %0x\n", __func__, port->number);
336
337 port->write_urb_busy = 0;
338 if (status) {
339 dbg("%s - nonzero write bulk status received: %d",
340 __func__, status);
341 return;
342 }
343
344 usb_serial_port_softint(port);
345}
346
347
348static void omninet_disconnect(struct usb_serial *serial)
349{
350 struct usb_serial_port *wport = serial->port[1];
351
352 dbg("%s", __func__);
353
354 usb_kill_urb(wport->write_urb);
355}
356
357
358static void omninet_release(struct usb_serial *serial)
359{
360 struct usb_serial_port *port = serial->port[0];
361
362 dbg("%s", __func__);
363
364 kfree(usb_get_serial_port_data(port));
365}
366
367
368static int __init omninet_init(void)
369{
370 int retval;
371 retval = usb_serial_register(&zyxel_omninet_device);
372 if (retval)
373 goto failed_usb_serial_register;
374 retval = usb_register(&omninet_driver);
375 if (retval)
376 goto failed_usb_register;
377 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
378 DRIVER_DESC "\n");
379 return 0;
380failed_usb_register:
381 usb_serial_deregister(&zyxel_omninet_device);
382failed_usb_serial_register:
383 return retval;
384}
385
386
387static void __exit omninet_exit(void)
388{
389 usb_deregister(&omninet_driver);
390 usb_serial_deregister(&zyxel_omninet_device);
391}
392
393
394module_init(omninet_init);
395module_exit(omninet_exit);
396
397MODULE_AUTHOR(DRIVER_AUTHOR);
398MODULE_DESCRIPTION(DRIVER_DESC);
399MODULE_LICENSE("GPL");
400
401module_param(debug, bool, S_IRUGO | S_IWUSR);
402MODULE_PARM_DESC(debug, "Debug enabled or not");
403