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1/*
2 * USB ZyXEL omni.net LCD PLUS driver
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License version
6 * 2 as published by the Free Software Foundation.
7 *
8 * See Documentation/usb/usb-serial.txt for more information on using this
9 * driver
10 *
11 * Please report both successes and troubles to the author at omninet@kroah.com
12 *
13 * (05/30/2001) gkh
14 * switched from using spinlock to a semaphore, which fixes lots of
15 * problems.
16 *
17 * (04/08/2001) gb
18 * Identify version on module load.
19 *
20 * (11/01/2000) Adam J. Richter
21 * usb_device_id table support
22 *
23 * (10/05/2000) gkh
24 * Fixed bug with urb->dev not being set properly, now that the usb
25 * core needs it.
26 *
27 * (08/28/2000) gkh
28 * Added locks for SMP safeness.
29 * Fixed MOD_INC and MOD_DEC logic and the ability to open a port more
30 * than once.
31 * Fixed potential race in omninet_write_bulk_callback
32 *
33 * (07/19/2000) gkh
34 * Added module_init and module_exit functions to handle the fact that this
35 * driver is a loadable module now.
36 *
37 */
38
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 * Version Information
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/* This one seems to be a re-branded ZyXEL device */
64#define BT_IGNITIONPRO_ID 0x2000
65
66/* function prototypes */
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 const 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 { } /* Terminating entry */
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};
114
115
116/* The protocol.
117 *
118 * The omni.net always exchange 64 bytes of data with the host. The first
119 * four bytes are the control header, you can see it in the above structure.
120 *
121 * oh_seq is a sequence number. Don't know if/how it's used.
122 * oh_len is the length of the data bytes in the packet.
123 * oh_xxx Bit-mapped, related to handshaking and status info.
124 * I normally set it to 0x03 in trasmitted frames.
125 * 7: Active when the TA is in a CONNECTed state.
126 * 6: unknown
127 * 5: handshaking, unknown
128 * 4: handshaking, unknown
129 * 3: unknown, usually 0
130 * 2: unknown, usually 0
131 * 1: handshaking, unknown, usually set to 1 in trasmitted frames
132 * 0: handshaking, unknown, usually set to 1 in trasmitted frames
133 * oh_pad Probably a pad byte.
134 *
135 * After the header you will find data bytes if oh_len was greater than zero.
136 *
137 */
138
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; /* Sequence number for bulk_out URBs */
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 /* Start reading from the device */
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 "%s: omninet_read %d: ",
222 __FILE__, 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 /* Continue trying to always read */
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
251static int omninet_write(struct tty_struct *tty, struct usb_serial_port *port,
252 const unsigned char *buf, int count)
253{
254 struct usb_serial *serial = port->serial;
255 struct usb_serial_port *wport = serial->port[1];
256
257 struct omninet_data *od = usb_get_serial_port_data(port);
258 struct omninet_header *header = (struct omninet_header *)
259 wport->write_urb->transfer_buffer;
260
261 int result;
262
263 dbg("%s - port %d", __func__, port->number);
264
265 if (count == 0) {
266 dbg("%s - write request of 0 bytes", __func__);
267 return 0;
268 }
269
270 spin_lock_bh(&wport->lock);
271 if (wport->write_urb_busy) {
272 spin_unlock_bh(&wport->lock);
273 dbg("%s - already writing", __func__);
274 return 0;
275 }
276 wport->write_urb_busy = 1;
277 spin_unlock_bh(&wport->lock);
278
279 count = (count > OMNINET_BULKOUTSIZE) ? OMNINET_BULKOUTSIZE : count;
280
281 memcpy(wport->write_urb->transfer_buffer + OMNINET_DATAOFFSET,
282 buf, count);
283
284 usb_serial_debug_data(debug, &port->dev, __func__, count,
285 wport->write_urb->transfer_buffer);
286
287 header->oh_seq = od->od_outseq++;
288 header->oh_len = count;
289 header->oh_xxx = 0x03;
290 header->oh_pad = 0x00;
291
292 /* send the data out the bulk port, always 64 bytes */
293 wport->write_urb->transfer_buffer_length = 64;
294
295 wport->write_urb->dev = serial->dev;
296 result = usb_submit_urb(wport->write_urb, GFP_ATOMIC);
297 if (result) {
298 wport->write_urb_busy = 0;
299 dev_err(&port->dev,
300 "%s - failed submitting write urb, error %d\n",
301 __func__, result);
302 } else
303 result = count;
304
305 return result;
306}
307
308
309static int omninet_write_room(struct tty_struct *tty)
310{
311 struct usb_serial_port *port = tty->driver_data;
312 struct usb_serial *serial = port->serial;
313 struct usb_serial_port *wport = serial->port[1];
314
315 int room = 0; /* Default: no room */
316
317 /* FIXME: no consistent locking for write_urb_busy */
318 if (wport->write_urb_busy)
319 room = wport->bulk_out_size - OMNINET_HEADERLEN;
320
321 dbg("%s - returns %d", __func__, room);
322
323 return room;
324}
325
326static void omninet_write_bulk_callback(struct urb *urb)
327{
328/* struct omninet_header *header = (struct omninet_header *)
329 urb->transfer_buffer; */
330 struct usb_serial_port *port = urb->context;
331 int status = urb->status;
332
333 dbg("%s - port %0x", __func__, port->number);
334
335 port->write_urb_busy = 0;
336 if (status) {
337 dbg("%s - nonzero write bulk status received: %d",
338 __func__, status);
339 return;
340 }
341
342 usb_serial_port_softint(port);
343}
344
345
346static void omninet_disconnect(struct usb_serial *serial)
347{
348 struct usb_serial_port *wport = serial->port[1];
349
350 dbg("%s", __func__);
351
352 usb_kill_urb(wport->write_urb);
353}
354
355
356static void omninet_release(struct usb_serial *serial)
357{
358 struct usb_serial_port *port = serial->port[0];
359
360 dbg("%s", __func__);
361
362 kfree(usb_get_serial_port_data(port));
363}
364
365
366static int __init omninet_init(void)
367{
368 int retval;
369 retval = usb_serial_register(&zyxel_omninet_device);
370 if (retval)
371 goto failed_usb_serial_register;
372 retval = usb_register(&omninet_driver);
373 if (retval)
374 goto failed_usb_register;
375 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
376 DRIVER_DESC "\n");
377 return 0;
378failed_usb_register:
379 usb_serial_deregister(&zyxel_omninet_device);
380failed_usb_serial_register:
381 return retval;
382}
383
384
385static void __exit omninet_exit(void)
386{
387 usb_deregister(&omninet_driver);
388 usb_serial_deregister(&zyxel_omninet_device);
389}
390
391
392module_init(omninet_init);
393module_exit(omninet_exit);
394
395MODULE_AUTHOR(DRIVER_AUTHOR);
396MODULE_DESCRIPTION(DRIVER_DESC);
397MODULE_LICENSE("GPL");
398
399module_param(debug, bool, S_IRUGO | S_IWUSR);
400MODULE_PARM_DESC(debug, "Debug enabled or not");
1/*
2 * USB ZyXEL omni.net LCD PLUS driver
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License version
6 * 2 as published by the Free Software Foundation.
7 *
8 * See Documentation/usb/usb-serial.txt for more information on using this
9 * driver
10 *
11 * Please report both successes and troubles to the author at omninet@kroah.com
12 */
13
14#include <linux/kernel.h>
15#include <linux/errno.h>
16#include <linux/init.h>
17#include <linux/slab.h>
18#include <linux/tty.h>
19#include <linux/tty_driver.h>
20#include <linux/tty_flip.h>
21#include <linux/module.h>
22#include <linux/uaccess.h>
23#include <linux/usb.h>
24#include <linux/usb/serial.h>
25
26static bool debug;
27
28/*
29 * Version Information
30 */
31#define DRIVER_VERSION "v1.1"
32#define DRIVER_AUTHOR "Alessandro Zummo"
33#define DRIVER_DESC "USB ZyXEL omni.net LCD PLUS Driver"
34
35#define ZYXEL_VENDOR_ID 0x0586
36#define ZYXEL_OMNINET_ID 0x1000
37/* This one seems to be a re-branded ZyXEL device */
38#define BT_IGNITIONPRO_ID 0x2000
39
40/* function prototypes */
41static int omninet_open(struct tty_struct *tty, struct usb_serial_port *port);
42static void omninet_close(struct usb_serial_port *port);
43static void omninet_read_bulk_callback(struct urb *urb);
44static void omninet_write_bulk_callback(struct urb *urb);
45static int omninet_write(struct tty_struct *tty, struct usb_serial_port *port,
46 const unsigned char *buf, int count);
47static int omninet_write_room(struct tty_struct *tty);
48static void omninet_disconnect(struct usb_serial *serial);
49static void omninet_release(struct usb_serial *serial);
50static int omninet_attach(struct usb_serial *serial);
51
52static const struct usb_device_id id_table[] = {
53 { USB_DEVICE(ZYXEL_VENDOR_ID, ZYXEL_OMNINET_ID) },
54 { USB_DEVICE(ZYXEL_VENDOR_ID, BT_IGNITIONPRO_ID) },
55 { } /* Terminating entry */
56};
57MODULE_DEVICE_TABLE(usb, id_table);
58
59static struct usb_serial_driver zyxel_omninet_device = {
60 .driver = {
61 .owner = THIS_MODULE,
62 .name = "omninet",
63 },
64 .description = "ZyXEL - omni.net lcd plus usb",
65 .id_table = id_table,
66 .num_ports = 1,
67 .attach = omninet_attach,
68 .open = omninet_open,
69 .close = omninet_close,
70 .write = omninet_write,
71 .write_room = omninet_write_room,
72 .read_bulk_callback = omninet_read_bulk_callback,
73 .write_bulk_callback = omninet_write_bulk_callback,
74 .disconnect = omninet_disconnect,
75 .release = omninet_release,
76};
77
78static struct usb_serial_driver * const serial_drivers[] = {
79 &zyxel_omninet_device, NULL
80};
81
82
83/* The protocol.
84 *
85 * The omni.net always exchange 64 bytes of data with the host. The first
86 * four bytes are the control header, you can see it in the above structure.
87 *
88 * oh_seq is a sequence number. Don't know if/how it's used.
89 * oh_len is the length of the data bytes in the packet.
90 * oh_xxx Bit-mapped, related to handshaking and status info.
91 * I normally set it to 0x03 in trasmitted frames.
92 * 7: Active when the TA is in a CONNECTed state.
93 * 6: unknown
94 * 5: handshaking, unknown
95 * 4: handshaking, unknown
96 * 3: unknown, usually 0
97 * 2: unknown, usually 0
98 * 1: handshaking, unknown, usually set to 1 in trasmitted frames
99 * 0: handshaking, unknown, usually set to 1 in trasmitted frames
100 * oh_pad Probably a pad byte.
101 *
102 * After the header you will find data bytes if oh_len was greater than zero.
103 *
104 */
105
106struct omninet_header {
107 __u8 oh_seq;
108 __u8 oh_len;
109 __u8 oh_xxx;
110 __u8 oh_pad;
111};
112
113struct omninet_data {
114 __u8 od_outseq; /* Sequence number for bulk_out URBs */
115};
116
117static int omninet_attach(struct usb_serial *serial)
118{
119 struct omninet_data *od;
120 struct usb_serial_port *port = serial->port[0];
121
122 od = kmalloc(sizeof(struct omninet_data), GFP_KERNEL);
123 if (!od) {
124 dev_err(&port->dev, "%s- kmalloc(%Zd) failed.\n",
125 __func__, sizeof(struct omninet_data));
126 return -ENOMEM;
127 }
128 usb_set_serial_port_data(port, od);
129 return 0;
130}
131
132static int omninet_open(struct tty_struct *tty, struct usb_serial_port *port)
133{
134 struct usb_serial *serial = port->serial;
135 struct usb_serial_port *wport;
136 int result = 0;
137
138 wport = serial->port[1];
139 tty_port_tty_set(&wport->port, tty);
140
141 /* Start reading from the device */
142 result = usb_submit_urb(port->read_urb, GFP_KERNEL);
143 if (result)
144 dev_err(&port->dev,
145 "%s - failed submitting read urb, error %d\n",
146 __func__, result);
147 return result;
148}
149
150static void omninet_close(struct usb_serial_port *port)
151{
152 usb_kill_urb(port->read_urb);
153}
154
155
156#define OMNINET_DATAOFFSET 0x04
157#define OMNINET_HEADERLEN sizeof(struct omninet_header)
158#define OMNINET_BULKOUTSIZE (64 - OMNINET_HEADERLEN)
159
160static void omninet_read_bulk_callback(struct urb *urb)
161{
162 struct usb_serial_port *port = urb->context;
163 unsigned char *data = urb->transfer_buffer;
164 struct omninet_header *header = (struct omninet_header *) &data[0];
165 int status = urb->status;
166 int result;
167 int i;
168
169 if (status) {
170 dbg("%s - nonzero read bulk status received: %d",
171 __func__, status);
172 return;
173 }
174
175 if (debug && header->oh_xxx != 0x30) {
176 if (urb->actual_length) {
177 printk(KERN_DEBUG "%s: omninet_read %d: ",
178 __FILE__, header->oh_len);
179 for (i = 0; i < (header->oh_len +
180 OMNINET_HEADERLEN); i++)
181 printk("%.2x ", data[i]);
182 printk("\n");
183 }
184 }
185
186 if (urb->actual_length && header->oh_len) {
187 struct tty_struct *tty = tty_port_tty_get(&port->port);
188 tty_insert_flip_string(tty, data + OMNINET_DATAOFFSET,
189 header->oh_len);
190 tty_flip_buffer_push(tty);
191 tty_kref_put(tty);
192 }
193
194 /* Continue trying to always read */
195 result = usb_submit_urb(urb, GFP_ATOMIC);
196 if (result)
197 dev_err(&port->dev,
198 "%s - failed resubmitting read urb, error %d\n",
199 __func__, result);
200}
201
202static int omninet_write(struct tty_struct *tty, struct usb_serial_port *port,
203 const unsigned char *buf, int count)
204{
205 struct usb_serial *serial = port->serial;
206 struct usb_serial_port *wport = serial->port[1];
207
208 struct omninet_data *od = usb_get_serial_port_data(port);
209 struct omninet_header *header = (struct omninet_header *)
210 wport->write_urb->transfer_buffer;
211
212 int result;
213
214 if (count == 0) {
215 dbg("%s - write request of 0 bytes", __func__);
216 return 0;
217 }
218
219 if (!test_and_clear_bit(0, &port->write_urbs_free)) {
220 dbg("%s - already writing", __func__);
221 return 0;
222 }
223
224 count = (count > OMNINET_BULKOUTSIZE) ? OMNINET_BULKOUTSIZE : count;
225
226 memcpy(wport->write_urb->transfer_buffer + OMNINET_DATAOFFSET,
227 buf, count);
228
229 usb_serial_debug_data(debug, &port->dev, __func__, count,
230 wport->write_urb->transfer_buffer);
231
232 header->oh_seq = od->od_outseq++;
233 header->oh_len = count;
234 header->oh_xxx = 0x03;
235 header->oh_pad = 0x00;
236
237 /* send the data out the bulk port, always 64 bytes */
238 wport->write_urb->transfer_buffer_length = 64;
239
240 result = usb_submit_urb(wport->write_urb, GFP_ATOMIC);
241 if (result) {
242 set_bit(0, &wport->write_urbs_free);
243 dev_err_console(port,
244 "%s - failed submitting write urb, error %d\n",
245 __func__, result);
246 } else
247 result = count;
248
249 return result;
250}
251
252
253static int omninet_write_room(struct tty_struct *tty)
254{
255 struct usb_serial_port *port = tty->driver_data;
256 struct usb_serial *serial = port->serial;
257 struct usb_serial_port *wport = serial->port[1];
258
259 int room = 0; /* Default: no room */
260
261 if (test_bit(0, &wport->write_urbs_free))
262 room = wport->bulk_out_size - OMNINET_HEADERLEN;
263
264 dbg("%s - returns %d", __func__, room);
265
266 return room;
267}
268
269static void omninet_write_bulk_callback(struct urb *urb)
270{
271/* struct omninet_header *header = (struct omninet_header *)
272 urb->transfer_buffer; */
273 struct usb_serial_port *port = urb->context;
274 int status = urb->status;
275
276 set_bit(0, &port->write_urbs_free);
277 if (status) {
278 dbg("%s - nonzero write bulk status received: %d",
279 __func__, status);
280 return;
281 }
282
283 usb_serial_port_softint(port);
284}
285
286
287static void omninet_disconnect(struct usb_serial *serial)
288{
289 struct usb_serial_port *wport = serial->port[1];
290
291 usb_kill_urb(wport->write_urb);
292}
293
294
295static void omninet_release(struct usb_serial *serial)
296{
297 struct usb_serial_port *port = serial->port[0];
298
299 kfree(usb_get_serial_port_data(port));
300}
301
302module_usb_serial_driver(serial_drivers, id_table);
303
304MODULE_AUTHOR(DRIVER_AUTHOR);
305MODULE_DESCRIPTION(DRIVER_DESC);
306MODULE_LICENSE("GPL");
307
308module_param(debug, bool, S_IRUGO | S_IWUSR);
309MODULE_PARM_DESC(debug, "Debug enabled or not");