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Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
[deliverable/linux.git] / drivers / usb / serial / option.c
1 /*
2 USB Driver for GSM modems
3
4 Copyright (C) 2005 Matthias Urlichs <smurf@smurf.noris.de>
5
6 This driver is free software; you can redistribute it and/or modify
7 it under the terms of Version 2 of the GNU General Public License as
8 published by the Free Software Foundation.
9
10 Portions copied from the Keyspan driver by Hugh Blemings <hugh@blemings.org>
11
12 History: see the git log.
13
14 Work sponsored by: Sigos GmbH, Germany <info@sigos.de>
15
16 This driver exists because the "normal" serial driver doesn't work too well
17 with GSM modems. Issues:
18 - data loss -- one single Receive URB is not nearly enough
19 - nonstandard flow (Option devices) control
20 - controlling the baud rate doesn't make sense
21
22 This driver is named "option" because the most common device it's
23 used for is a PC-Card (with an internal OHCI-USB interface, behind
24 which the GSM interface sits), made by Option Inc.
25
26 Some of the "one port" devices actually exhibit multiple USB instances
27 on the USB bus. This is not a bug, these ports are used for different
28 device features.
29 */
30
31 #define DRIVER_VERSION "v0.7.2"
32 #define DRIVER_AUTHOR "Matthias Urlichs <smurf@smurf.noris.de>"
33 #define DRIVER_DESC "USB Driver for GSM modems"
34
35 #include <linux/kernel.h>
36 #include <linux/jiffies.h>
37 #include <linux/errno.h>
38 #include <linux/tty.h>
39 #include <linux/tty_flip.h>
40 #include <linux/module.h>
41 #include <linux/bitops.h>
42 #include <linux/usb.h>
43 #include <linux/usb/serial.h>
44
45 /* Function prototypes */
46 static int option_open(struct usb_serial_port *port, struct file *filp);
47 static void option_close(struct usb_serial_port *port, struct file *filp);
48 static int option_startup(struct usb_serial *serial);
49 static void option_shutdown(struct usb_serial *serial);
50 static void option_rx_throttle(struct usb_serial_port *port);
51 static void option_rx_unthrottle(struct usb_serial_port *port);
52 static int option_write_room(struct usb_serial_port *port);
53
54 static void option_instat_callback(struct urb *urb);
55
56 static int option_write(struct usb_serial_port *port,
57 const unsigned char *buf, int count);
58
59 static int option_chars_in_buffer(struct usb_serial_port *port);
60 static int option_ioctl(struct usb_serial_port *port, struct file *file,
61 unsigned int cmd, unsigned long arg);
62 static void option_set_termios(struct usb_serial_port *port,
63 struct ktermios *old);
64 static void option_break_ctl(struct usb_serial_port *port, int break_state);
65 static int option_tiocmget(struct usb_serial_port *port, struct file *file);
66 static int option_tiocmset(struct usb_serial_port *port, struct file *file,
67 unsigned int set, unsigned int clear);
68 static int option_send_setup(struct usb_serial_port *port);
69
70 /* Vendor and product IDs */
71 #define OPTION_VENDOR_ID 0x0AF0
72 #define OPTION_PRODUCT_COLT 0x5000
73 #define OPTION_PRODUCT_RICOLA 0x6000
74 #define OPTION_PRODUCT_RICOLA_LIGHT 0x6100
75 #define OPTION_PRODUCT_RICOLA_QUAD 0x6200
76 #define OPTION_PRODUCT_RICOLA_QUAD_LIGHT 0x6300
77 #define OPTION_PRODUCT_RICOLA_NDIS 0x6050
78 #define OPTION_PRODUCT_RICOLA_NDIS_LIGHT 0x6150
79 #define OPTION_PRODUCT_RICOLA_NDIS_QUAD 0x6250
80 #define OPTION_PRODUCT_RICOLA_NDIS_QUAD_LIGHT 0x6350
81 #define OPTION_PRODUCT_COBRA 0x6500
82 #define OPTION_PRODUCT_COBRA_BUS 0x6501
83 #define OPTION_PRODUCT_VIPER 0x6600
84 #define OPTION_PRODUCT_VIPER_BUS 0x6601
85 #define OPTION_PRODUCT_GT_MAX_READY 0x6701
86 #define OPTION_PRODUCT_GT_MAX 0x6711
87 #define OPTION_PRODUCT_FUJI_MODEM_LIGHT 0x6721
88 #define OPTION_PRODUCT_FUJI_MODEM_GT 0x6741
89 #define OPTION_PRODUCT_FUJI_MODEM_EX 0x6761
90 #define OPTION_PRODUCT_FUJI_NETWORK_LIGHT 0x6731
91 #define OPTION_PRODUCT_FUJI_NETWORK_GT 0x6751
92 #define OPTION_PRODUCT_FUJI_NETWORK_EX 0x6771
93 #define OPTION_PRODUCT_KOI_MODEM 0x6800
94 #define OPTION_PRODUCT_KOI_NETWORK 0x6811
95 #define OPTION_PRODUCT_SCORPION_MODEM 0x6901
96 #define OPTION_PRODUCT_SCORPION_NETWORK 0x6911
97 #define OPTION_PRODUCT_ETNA_MODEM 0x7001
98 #define OPTION_PRODUCT_ETNA_NETWORK 0x7011
99 #define OPTION_PRODUCT_ETNA_MODEM_LITE 0x7021
100 #define OPTION_PRODUCT_ETNA_MODEM_GT 0x7041
101 #define OPTION_PRODUCT_ETNA_MODEM_EX 0x7061
102 #define OPTION_PRODUCT_ETNA_NETWORK_LITE 0x7031
103 #define OPTION_PRODUCT_ETNA_NETWORK_GT 0x7051
104 #define OPTION_PRODUCT_ETNA_NETWORK_EX 0x7071
105 #define OPTION_PRODUCT_ETNA_KOI_MODEM 0x7100
106 #define OPTION_PRODUCT_ETNA_KOI_NETWORK 0x7111
107
108 #define HUAWEI_VENDOR_ID 0x12D1
109 #define HUAWEI_PRODUCT_E600 0x1001
110 #define HUAWEI_PRODUCT_E220 0x1003
111 #define HUAWEI_PRODUCT_E220BIS 0x1004
112 #define HUAWEI_PRODUCT_E1401 0x1401
113 #define HUAWEI_PRODUCT_E1403 0x1403
114 #define HUAWEI_PRODUCT_E1405 0x1405
115 #define HUAWEI_PRODUCT_E1406 0x1406
116 #define HUAWEI_PRODUCT_E1408 0x1408
117 #define HUAWEI_PRODUCT_E1409 0x1409
118 #define HUAWEI_PRODUCT_E1410 0x1410
119 #define HUAWEI_PRODUCT_E1411 0x1411
120 #define HUAWEI_PRODUCT_E1412 0x1412
121 #define HUAWEI_PRODUCT_E1413 0x1413
122 #define HUAWEI_PRODUCT_E1414 0x1414
123 #define HUAWEI_PRODUCT_E1415 0x1415
124 #define HUAWEI_PRODUCT_E1416 0x1416
125 #define HUAWEI_PRODUCT_E1417 0x1417
126 #define HUAWEI_PRODUCT_E1418 0x1418
127 #define HUAWEI_PRODUCT_E1419 0x1419
128
129 #define NOVATELWIRELESS_VENDOR_ID 0x1410
130
131 /* MERLIN EVDO PRODUCTS */
132 #define NOVATELWIRELESS_PRODUCT_V640 0x1100
133 #define NOVATELWIRELESS_PRODUCT_V620 0x1110
134 #define NOVATELWIRELESS_PRODUCT_V740 0x1120
135 #define NOVATELWIRELESS_PRODUCT_V720 0x1130
136
137 /* MERLIN HSDPA/HSPA PRODUCTS */
138 #define NOVATELWIRELESS_PRODUCT_U730 0x1400
139 #define NOVATELWIRELESS_PRODUCT_U740 0x1410
140 #define NOVATELWIRELESS_PRODUCT_U870 0x1420
141 #define NOVATELWIRELESS_PRODUCT_XU870 0x1430
142 #define NOVATELWIRELESS_PRODUCT_X950D 0x1450
143
144 /* EXPEDITE PRODUCTS */
145 #define NOVATELWIRELESS_PRODUCT_EV620 0x2100
146 #define NOVATELWIRELESS_PRODUCT_ES720 0x2110
147 #define NOVATELWIRELESS_PRODUCT_E725 0x2120
148 #define NOVATELWIRELESS_PRODUCT_ES620 0x2130
149 #define NOVATELWIRELESS_PRODUCT_EU730 0x2400
150 #define NOVATELWIRELESS_PRODUCT_EU740 0x2410
151 #define NOVATELWIRELESS_PRODUCT_EU870D 0x2420
152
153 /* OVATION PRODUCTS */
154 #define NOVATELWIRELESS_PRODUCT_MC727 0x4100
155 #define NOVATELWIRELESS_PRODUCT_MC950D 0x4400
156
157 /* FUTURE NOVATEL PRODUCTS */
158 #define NOVATELWIRELESS_PRODUCT_EVDO_1 0x6000
159 #define NOVATELWIRELESS_PRODUCT_HSPA_1 0x7000
160 #define NOVATELWIRELESS_PRODUCT_EMBEDDED_1 0x8000
161 #define NOVATELWIRELESS_PRODUCT_GLOBAL_1 0x9000
162 #define NOVATELWIRELESS_PRODUCT_EVDO_2 0x6001
163 #define NOVATELWIRELESS_PRODUCT_HSPA_2 0x7001
164 #define NOVATELWIRELESS_PRODUCT_EMBEDDED_2 0x8001
165 #define NOVATELWIRELESS_PRODUCT_GLOBAL_2 0x9001
166
167 /* AMOI PRODUCTS */
168 #define AMOI_VENDOR_ID 0x1614
169 #define AMOI_PRODUCT_H01 0x0800
170 #define AMOI_PRODUCT_H01A 0x7002
171 #define AMOI_PRODUCT_H02 0x0802
172
173 #define DELL_VENDOR_ID 0x413C
174
175 #define KYOCERA_VENDOR_ID 0x0c88
176 #define KYOCERA_PRODUCT_KPC650 0x17da
177 #define KYOCERA_PRODUCT_KPC680 0x180a
178
179 #define ANYDATA_VENDOR_ID 0x16d5
180 #define ANYDATA_PRODUCT_ADU_E100A 0x6501
181 #define ANYDATA_PRODUCT_ADU_500A 0x6502
182
183 #define AXESSTEL_VENDOR_ID 0x1726
184 #define AXESSTEL_PRODUCT_MV110H 0x1000
185
186 #define ONDA_VENDOR_ID 0x19d2
187 #define ONDA_PRODUCT_MSA501HS 0x0001
188 #define ONDA_PRODUCT_ET502HS 0x0002
189
190 #define BANDRICH_VENDOR_ID 0x1A8D
191 #define BANDRICH_PRODUCT_C100_1 0x1002
192 #define BANDRICH_PRODUCT_C100_2 0x1003
193
194 #define AMOI_VENDOR_ID 0x1614
195 #define AMOI_PRODUCT_9508 0x0800
196
197 #define QUALCOMM_VENDOR_ID 0x05C6
198
199 #define MAXON_VENDOR_ID 0x16d8
200
201 #define TELIT_VENDOR_ID 0x1bc7
202 #define TELIT_PRODUCT_UC864E 0x1003
203
204 static struct usb_device_id option_ids[] = {
205 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COLT) },
206 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA) },
207 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_LIGHT) },
208 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_QUAD) },
209 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_QUAD_LIGHT) },
210 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS) },
211 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS_LIGHT) },
212 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS_QUAD) },
213 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_RICOLA_NDIS_QUAD_LIGHT) },
214 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COBRA) },
215 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_COBRA_BUS) },
216 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_VIPER) },
217 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_VIPER_BUS) },
218 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_GT_MAX_READY) },
219 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_GT_MAX) },
220 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_MODEM_LIGHT) },
221 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_MODEM_GT) },
222 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_MODEM_EX) },
223 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_NETWORK_LIGHT) },
224 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_NETWORK_GT) },
225 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_FUJI_NETWORK_EX) },
226 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_KOI_MODEM) },
227 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_KOI_NETWORK) },
228 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_SCORPION_MODEM) },
229 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_SCORPION_NETWORK) },
230 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM) },
231 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK) },
232 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM_LITE) },
233 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM_GT) },
234 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_MODEM_EX) },
235 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK_LITE) },
236 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK_GT) },
237 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_NETWORK_EX) },
238 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_KOI_MODEM) },
239 { USB_DEVICE(OPTION_VENDOR_ID, OPTION_PRODUCT_ETNA_KOI_NETWORK) },
240 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E600, 0xff, 0xff, 0xff) },
241 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E220, 0xff, 0xff, 0xff) },
242 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E220BIS, 0xff, 0xff, 0xff) },
243 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E1401, 0xff, 0xff, 0xff) },
244 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E1403, 0xff, 0xff, 0xff) },
245 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E1405, 0xff, 0xff, 0xff) },
246 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E1406, 0xff, 0xff, 0xff) },
247 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E1408, 0xff, 0xff, 0xff) },
248 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E1409, 0xff, 0xff, 0xff) },
249 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E1410, 0xff, 0xff, 0xff) },
250 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E1411, 0xff, 0xff, 0xff) },
251 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E1412, 0xff, 0xff, 0xff) },
252 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E1413, 0xff, 0xff, 0xff) },
253 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E1414, 0xff, 0xff, 0xff) },
254 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E1415, 0xff, 0xff, 0xff) },
255 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E1416, 0xff, 0xff, 0xff) },
256 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E1417, 0xff, 0xff, 0xff) },
257 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E1418, 0xff, 0xff, 0xff) },
258 { USB_DEVICE_AND_INTERFACE_INFO(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E1419, 0xff, 0xff, 0xff) },
259 { USB_DEVICE(AMOI_VENDOR_ID, AMOI_PRODUCT_9508) },
260 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_V640) }, /* Novatel Merlin V640/XV620 */
261 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_V620) }, /* Novatel Merlin V620/S620 */
262 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_V740) }, /* Novatel Merlin EX720/V740/X720 */
263 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_V720) }, /* Novatel Merlin V720/S720/PC720 */
264 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_U730) }, /* Novatel U730/U740 (VF version) */
265 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_U740) }, /* Novatel U740 */
266 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_U870) }, /* Novatel U870 */
267 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_XU870) }, /* Novatel Merlin XU870 HSDPA/3G */
268 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_X950D) }, /* Novatel X950D */
269 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_EV620) }, /* Novatel EV620/ES620 CDMA/EV-DO */
270 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_ES720) }, /* Novatel ES620/ES720/U720/USB720 */
271 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_E725) }, /* Novatel E725/E726 */
272 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_ES620) }, /* Novatel Merlin ES620 SM Bus */
273 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_EU730) }, /* Novatel EU730 and Vodafone EU740 */
274 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_EU740) }, /* Novatel non-Vodafone EU740 */
275 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_EU870D) }, /* Novatel EU850D/EU860D/EU870D */
276 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_MC950D) }, /* Novatel MC930D/MC950D */
277 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_MC727) }, /* Novatel MC727/U727/USB727 */
278 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_EVDO_1) }, /* Novatel EVDO product */
279 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_HSPA_1) }, /* Novatel HSPA product */
280 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_EMBEDDED_1) }, /* Novatel Embedded product */
281 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_GLOBAL_1) }, /* Novatel Global product */
282 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_EVDO_2) }, /* Novatel EVDO product */
283 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_HSPA_2) }, /* Novatel HSPA product */
284 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_EMBEDDED_2) }, /* Novatel Embedded product */
285 { USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_GLOBAL_2) }, /* Novatel Global product */
286
287 { USB_DEVICE(AMOI_VENDOR_ID, AMOI_PRODUCT_H01) },
288 { USB_DEVICE(AMOI_VENDOR_ID, AMOI_PRODUCT_H01A) },
289 { USB_DEVICE(AMOI_VENDOR_ID, AMOI_PRODUCT_H02) },
290
291 { USB_DEVICE(DELL_VENDOR_ID, 0x8114) }, /* Dell Wireless 5700 Mobile Broadband CDMA/EVDO Mini-Card == Novatel Expedite EV620 CDMA/EV-DO */
292 { USB_DEVICE(DELL_VENDOR_ID, 0x8115) }, /* Dell Wireless 5500 Mobile Broadband HSDPA Mini-Card == Novatel Expedite EU740 HSDPA/3G */
293 { USB_DEVICE(DELL_VENDOR_ID, 0x8116) }, /* Dell Wireless 5505 Mobile Broadband HSDPA Mini-Card == Novatel Expedite EU740 HSDPA/3G */
294 { USB_DEVICE(DELL_VENDOR_ID, 0x8117) }, /* Dell Wireless 5700 Mobile Broadband CDMA/EVDO ExpressCard == Novatel Merlin XV620 CDMA/EV-DO */
295 { USB_DEVICE(DELL_VENDOR_ID, 0x8118) }, /* Dell Wireless 5510 Mobile Broadband HSDPA ExpressCard == Novatel Merlin XU870 HSDPA/3G */
296 { USB_DEVICE(DELL_VENDOR_ID, 0x8128) }, /* Dell Wireless 5700 Mobile Broadband CDMA/EVDO Mini-Card == Novatel Expedite E720 CDMA/EV-DO */
297 { USB_DEVICE(DELL_VENDOR_ID, 0x8129) }, /* Dell Wireless 5700 Mobile Broadband CDMA/EVDO Mini-Card == Novatel Expedite ET620 CDMA/EV-DO */
298 { USB_DEVICE(DELL_VENDOR_ID, 0x8133) }, /* Dell Wireless 5720 == Novatel EV620 CDMA/EV-DO */
299 { USB_DEVICE(DELL_VENDOR_ID, 0x8136) }, /* Dell Wireless HSDPA 5520 == Novatel Expedite EU860D */
300 { USB_DEVICE(DELL_VENDOR_ID, 0x8137) }, /* Dell Wireless HSDPA 5520 */
301 { USB_DEVICE(DELL_VENDOR_ID, 0x8138) }, /* Dell Wireless 5520 Voda I Mobile Broadband (3G HSDPA) Minicard */
302 { USB_DEVICE(ANYDATA_VENDOR_ID, ANYDATA_PRODUCT_ADU_E100A) },
303 { USB_DEVICE(ANYDATA_VENDOR_ID, ANYDATA_PRODUCT_ADU_500A) },
304 { USB_DEVICE(AXESSTEL_VENDOR_ID, AXESSTEL_PRODUCT_MV110H) },
305 { USB_DEVICE(ONDA_VENDOR_ID, ONDA_PRODUCT_MSA501HS) },
306 { USB_DEVICE(ONDA_VENDOR_ID, ONDA_PRODUCT_ET502HS) },
307 { USB_DEVICE(BANDRICH_VENDOR_ID, BANDRICH_PRODUCT_C100_1) },
308 { USB_DEVICE(BANDRICH_VENDOR_ID, BANDRICH_PRODUCT_C100_2) },
309 { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_PRODUCT_KPC650) },
310 { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_PRODUCT_KPC680) },
311 { USB_DEVICE(QUALCOMM_VENDOR_ID, 0x6000)}, /* ZTE AC8700 */
312 { USB_DEVICE(QUALCOMM_VENDOR_ID, 0x6613)}, /* Onda H600/ZTE MF330 */
313 { USB_DEVICE(MAXON_VENDOR_ID, 0x6280) }, /* BP3-USB & BP3-EXT HSDPA */
314 { USB_DEVICE(TELIT_VENDOR_ID, TELIT_PRODUCT_UC864E) },
315 { } /* Terminating entry */
316 };
317 MODULE_DEVICE_TABLE(usb, option_ids);
318
319 static struct usb_driver option_driver = {
320 .name = "option",
321 .probe = usb_serial_probe,
322 .disconnect = usb_serial_disconnect,
323 .id_table = option_ids,
324 .no_dynamic_id = 1,
325 };
326
327 /* The card has three separate interfaces, which the serial driver
328 * recognizes separately, thus num_port=1.
329 */
330
331 static struct usb_serial_driver option_1port_device = {
332 .driver = {
333 .owner = THIS_MODULE,
334 .name = "option1",
335 },
336 .description = "GSM modem (1-port)",
337 .usb_driver = &option_driver,
338 .id_table = option_ids,
339 .num_ports = 1,
340 .open = option_open,
341 .close = option_close,
342 .write = option_write,
343 .write_room = option_write_room,
344 .chars_in_buffer = option_chars_in_buffer,
345 .throttle = option_rx_throttle,
346 .unthrottle = option_rx_unthrottle,
347 .ioctl = option_ioctl,
348 .set_termios = option_set_termios,
349 .break_ctl = option_break_ctl,
350 .tiocmget = option_tiocmget,
351 .tiocmset = option_tiocmset,
352 .attach = option_startup,
353 .shutdown = option_shutdown,
354 .read_int_callback = option_instat_callback,
355 };
356
357 #ifdef CONFIG_USB_DEBUG
358 static int debug;
359 #else
360 #define debug 0
361 #endif
362
363 /* per port private data */
364
365 #define N_IN_URB 4
366 #define N_OUT_URB 1
367 #define IN_BUFLEN 4096
368 #define OUT_BUFLEN 128
369
370 struct option_port_private {
371 /* Input endpoints and buffer for this port */
372 struct urb *in_urbs[N_IN_URB];
373 u8 *in_buffer[N_IN_URB];
374 /* Output endpoints and buffer for this port */
375 struct urb *out_urbs[N_OUT_URB];
376 u8 *out_buffer[N_OUT_URB];
377 unsigned long out_busy; /* Bit vector of URBs in use */
378
379 /* Settings for the port */
380 int rts_state; /* Handshaking pins (outputs) */
381 int dtr_state;
382 int cts_state; /* Handshaking pins (inputs) */
383 int dsr_state;
384 int dcd_state;
385 int ri_state;
386
387 unsigned long tx_start_time[N_OUT_URB];
388 };
389
390 /* Functions used by new usb-serial code. */
391 static int __init option_init(void)
392 {
393 int retval;
394 retval = usb_serial_register(&option_1port_device);
395 if (retval)
396 goto failed_1port_device_register;
397 retval = usb_register(&option_driver);
398 if (retval)
399 goto failed_driver_register;
400
401 info(DRIVER_DESC ": " DRIVER_VERSION);
402
403 return 0;
404
405 failed_driver_register:
406 usb_serial_deregister (&option_1port_device);
407 failed_1port_device_register:
408 return retval;
409 }
410
411 static void __exit option_exit(void)
412 {
413 usb_deregister (&option_driver);
414 usb_serial_deregister (&option_1port_device);
415 }
416
417 module_init(option_init);
418 module_exit(option_exit);
419
420 static void option_rx_throttle(struct usb_serial_port *port)
421 {
422 dbg("%s", __func__);
423 }
424
425 static void option_rx_unthrottle(struct usb_serial_port *port)
426 {
427 dbg("%s", __func__);
428 }
429
430 static void option_break_ctl(struct usb_serial_port *port, int break_state)
431 {
432 /* Unfortunately, I don't know how to send a break */
433 dbg("%s", __func__);
434 }
435
436 static void option_set_termios(struct usb_serial_port *port,
437 struct ktermios *old_termios)
438 {
439 dbg("%s", __func__);
440 /* Doesn't support option setting */
441 tty_termios_copy_hw(port->tty->termios, old_termios);
442 option_send_setup(port);
443 }
444
445 static int option_tiocmget(struct usb_serial_port *port, struct file *file)
446 {
447 unsigned int value;
448 struct option_port_private *portdata;
449
450 portdata = usb_get_serial_port_data(port);
451
452 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
453 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
454 ((portdata->cts_state) ? TIOCM_CTS : 0) |
455 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
456 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
457 ((portdata->ri_state) ? TIOCM_RNG : 0);
458
459 return value;
460 }
461
462 static int option_tiocmset(struct usb_serial_port *port, struct file *file,
463 unsigned int set, unsigned int clear)
464 {
465 struct option_port_private *portdata;
466
467 portdata = usb_get_serial_port_data(port);
468
469 /* FIXME: what locks portdata fields ? */
470 if (set & TIOCM_RTS)
471 portdata->rts_state = 1;
472 if (set & TIOCM_DTR)
473 portdata->dtr_state = 1;
474
475 if (clear & TIOCM_RTS)
476 portdata->rts_state = 0;
477 if (clear & TIOCM_DTR)
478 portdata->dtr_state = 0;
479 return option_send_setup(port);
480 }
481
482 static int option_ioctl(struct usb_serial_port *port, struct file *file,
483 unsigned int cmd, unsigned long arg)
484 {
485 return -ENOIOCTLCMD;
486 }
487
488 /* Write */
489 static int option_write(struct usb_serial_port *port,
490 const unsigned char *buf, int count)
491 {
492 struct option_port_private *portdata;
493 int i;
494 int left, todo;
495 struct urb *this_urb = NULL; /* spurious */
496 int err;
497
498 portdata = usb_get_serial_port_data(port);
499
500 dbg("%s: write (%d chars)", __func__, count);
501
502 i = 0;
503 left = count;
504 for (i=0; left > 0 && i < N_OUT_URB; i++) {
505 todo = left;
506 if (todo > OUT_BUFLEN)
507 todo = OUT_BUFLEN;
508
509 this_urb = portdata->out_urbs[i];
510 if (test_and_set_bit(i, &portdata->out_busy)) {
511 if (time_before(jiffies,
512 portdata->tx_start_time[i] + 10 * HZ))
513 continue;
514 usb_unlink_urb(this_urb);
515 continue;
516 }
517 if (this_urb->status != 0)
518 dbg("usb_write %p failed (err=%d)",
519 this_urb, this_urb->status);
520
521 dbg("%s: endpoint %d buf %d", __func__,
522 usb_pipeendpoint(this_urb->pipe), i);
523
524 /* send the data */
525 memcpy (this_urb->transfer_buffer, buf, todo);
526 this_urb->transfer_buffer_length = todo;
527
528 this_urb->dev = port->serial->dev;
529 err = usb_submit_urb(this_urb, GFP_ATOMIC);
530 if (err) {
531 dbg("usb_submit_urb %p (write bulk) failed "
532 "(%d, has %d)", this_urb,
533 err, this_urb->status);
534 clear_bit(i, &portdata->out_busy);
535 continue;
536 }
537 portdata->tx_start_time[i] = jiffies;
538 buf += todo;
539 left -= todo;
540 }
541
542 count -= left;
543 dbg("%s: wrote (did %d)", __func__, count);
544 return count;
545 }
546
547 static void option_indat_callback(struct urb *urb)
548 {
549 int err;
550 int endpoint;
551 struct usb_serial_port *port;
552 struct tty_struct *tty;
553 unsigned char *data = urb->transfer_buffer;
554 int status = urb->status;
555
556 dbg("%s: %p", __func__, urb);
557
558 endpoint = usb_pipeendpoint(urb->pipe);
559 port = urb->context;
560
561 if (status) {
562 dbg("%s: nonzero status: %d on endpoint %02x.",
563 __func__, status, endpoint);
564 } else {
565 tty = port->tty;
566 if (urb->actual_length) {
567 tty_buffer_request_room(tty, urb->actual_length);
568 tty_insert_flip_string(tty, data, urb->actual_length);
569 tty_flip_buffer_push(tty);
570 } else {
571 dbg("%s: empty read urb received", __func__);
572 }
573
574 /* Resubmit urb so we continue receiving */
575 if (port->open_count && status != -ESHUTDOWN) {
576 err = usb_submit_urb(urb, GFP_ATOMIC);
577 if (err)
578 printk(KERN_ERR "%s: resubmit read urb failed. "
579 "(%d)", __func__, err);
580 }
581 }
582 return;
583 }
584
585 static void option_outdat_callback(struct urb *urb)
586 {
587 struct usb_serial_port *port;
588 struct option_port_private *portdata;
589 int i;
590
591 dbg("%s", __func__);
592
593 port = urb->context;
594
595 usb_serial_port_softint(port);
596
597 portdata = usb_get_serial_port_data(port);
598 for (i = 0; i < N_OUT_URB; ++i) {
599 if (portdata->out_urbs[i] == urb) {
600 smp_mb__before_clear_bit();
601 clear_bit(i, &portdata->out_busy);
602 break;
603 }
604 }
605 }
606
607 static void option_instat_callback(struct urb *urb)
608 {
609 int err;
610 int status = urb->status;
611 struct usb_serial_port *port = urb->context;
612 struct option_port_private *portdata = usb_get_serial_port_data(port);
613 struct usb_serial *serial = port->serial;
614
615 dbg("%s", __func__);
616 dbg("%s: urb %p port %p has data %p", __func__,urb,port,portdata);
617
618 if (status == 0) {
619 struct usb_ctrlrequest *req_pkt =
620 (struct usb_ctrlrequest *)urb->transfer_buffer;
621
622 if (!req_pkt) {
623 dbg("%s: NULL req_pkt\n", __func__);
624 return;
625 }
626 if ((req_pkt->bRequestType == 0xA1) &&
627 (req_pkt->bRequest == 0x20)) {
628 int old_dcd_state;
629 unsigned char signals = *((unsigned char *)
630 urb->transfer_buffer +
631 sizeof(struct usb_ctrlrequest));
632
633 dbg("%s: signal x%x", __func__, signals);
634
635 old_dcd_state = portdata->dcd_state;
636 portdata->cts_state = 1;
637 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
638 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
639 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
640
641 if (port->tty && !C_CLOCAL(port->tty) &&
642 old_dcd_state && !portdata->dcd_state)
643 tty_hangup(port->tty);
644 } else {
645 dbg("%s: type %x req %x", __func__,
646 req_pkt->bRequestType,req_pkt->bRequest);
647 }
648 } else
649 dbg("%s: error %d", __func__, status);
650
651 /* Resubmit urb so we continue receiving IRQ data */
652 if (status != -ESHUTDOWN) {
653 urb->dev = serial->dev;
654 err = usb_submit_urb(urb, GFP_ATOMIC);
655 if (err)
656 dbg("%s: resubmit intr urb failed. (%d)",
657 __func__, err);
658 }
659 }
660
661 static int option_write_room(struct usb_serial_port *port)
662 {
663 struct option_port_private *portdata;
664 int i;
665 int data_len = 0;
666 struct urb *this_urb;
667
668 portdata = usb_get_serial_port_data(port);
669
670
671 for (i=0; i < N_OUT_URB; i++) {
672 this_urb = portdata->out_urbs[i];
673 if (this_urb && !test_bit(i, &portdata->out_busy))
674 data_len += OUT_BUFLEN;
675 }
676
677 dbg("%s: %d", __func__, data_len);
678 return data_len;
679 }
680
681 static int option_chars_in_buffer(struct usb_serial_port *port)
682 {
683 struct option_port_private *portdata;
684 int i;
685 int data_len = 0;
686 struct urb *this_urb;
687
688 portdata = usb_get_serial_port_data(port);
689
690 for (i=0; i < N_OUT_URB; i++) {
691 this_urb = portdata->out_urbs[i];
692 /* FIXME: This locking is insufficient as this_urb may
693 go unused during the test */
694 if (this_urb && test_bit(i, &portdata->out_busy))
695 data_len += this_urb->transfer_buffer_length;
696 }
697 dbg("%s: %d", __func__, data_len);
698 return data_len;
699 }
700
701 static int option_open(struct usb_serial_port *port, struct file *filp)
702 {
703 struct option_port_private *portdata;
704 struct usb_serial *serial = port->serial;
705 int i, err;
706 struct urb *urb;
707
708 portdata = usb_get_serial_port_data(port);
709
710 dbg("%s", __func__);
711
712 /* Set some sane defaults */
713 portdata->rts_state = 1;
714 portdata->dtr_state = 1;
715
716 /* Reset low level data toggle and start reading from endpoints */
717 for (i = 0; i < N_IN_URB; i++) {
718 urb = portdata->in_urbs[i];
719 if (! urb)
720 continue;
721 if (urb->dev != serial->dev) {
722 dbg("%s: dev %p != %p", __func__,
723 urb->dev, serial->dev);
724 continue;
725 }
726
727 /*
728 * make sure endpoint data toggle is synchronized with the
729 * device
730 */
731 usb_clear_halt(urb->dev, urb->pipe);
732
733 err = usb_submit_urb(urb, GFP_KERNEL);
734 if (err) {
735 dbg("%s: submit urb %d failed (%d) %d",
736 __func__, i, err,
737 urb->transfer_buffer_length);
738 }
739 }
740
741 /* Reset low level data toggle on out endpoints */
742 for (i = 0; i < N_OUT_URB; i++) {
743 urb = portdata->out_urbs[i];
744 if (! urb)
745 continue;
746 urb->dev = serial->dev;
747 /* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
748 usb_pipeout(urb->pipe), 0); */
749 }
750
751 port->tty->low_latency = 1;
752
753 option_send_setup(port);
754
755 return (0);
756 }
757
758 static void option_close(struct usb_serial_port *port, struct file *filp)
759 {
760 int i;
761 struct usb_serial *serial = port->serial;
762 struct option_port_private *portdata;
763
764 dbg("%s", __func__);
765 portdata = usb_get_serial_port_data(port);
766
767 portdata->rts_state = 0;
768 portdata->dtr_state = 0;
769
770 if (serial->dev) {
771 mutex_lock(&serial->disc_mutex);
772 if (!serial->disconnected)
773 option_send_setup(port);
774 mutex_unlock(&serial->disc_mutex);
775
776 /* Stop reading/writing urbs */
777 for (i = 0; i < N_IN_URB; i++)
778 usb_kill_urb(portdata->in_urbs[i]);
779 for (i = 0; i < N_OUT_URB; i++)
780 usb_kill_urb(portdata->out_urbs[i]);
781 }
782 port->tty = NULL;
783 }
784
785 /* Helper functions used by option_setup_urbs */
786 static struct urb *option_setup_urb(struct usb_serial *serial, int endpoint,
787 int dir, void *ctx, char *buf, int len,
788 void (*callback)(struct urb *))
789 {
790 struct urb *urb;
791
792 if (endpoint == -1)
793 return NULL; /* endpoint not needed */
794
795 urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */
796 if (urb == NULL) {
797 dbg("%s: alloc for endpoint %d failed.", __func__, endpoint);
798 return NULL;
799 }
800
801 /* Fill URB using supplied data. */
802 usb_fill_bulk_urb(urb, serial->dev,
803 usb_sndbulkpipe(serial->dev, endpoint) | dir,
804 buf, len, callback, ctx);
805
806 return urb;
807 }
808
809 /* Setup urbs */
810 static void option_setup_urbs(struct usb_serial *serial)
811 {
812 int i,j;
813 struct usb_serial_port *port;
814 struct option_port_private *portdata;
815
816 dbg("%s", __func__);
817
818 for (i = 0; i < serial->num_ports; i++) {
819 port = serial->port[i];
820 portdata = usb_get_serial_port_data(port);
821
822 /* Do indat endpoints first */
823 for (j = 0; j < N_IN_URB; ++j) {
824 portdata->in_urbs[j] = option_setup_urb (serial,
825 port->bulk_in_endpointAddress, USB_DIR_IN, port,
826 portdata->in_buffer[j], IN_BUFLEN, option_indat_callback);
827 }
828
829 /* outdat endpoints */
830 for (j = 0; j < N_OUT_URB; ++j) {
831 portdata->out_urbs[j] = option_setup_urb (serial,
832 port->bulk_out_endpointAddress, USB_DIR_OUT, port,
833 portdata->out_buffer[j], OUT_BUFLEN, option_outdat_callback);
834 }
835 }
836 }
837
838
839 /** send RTS/DTR state to the port.
840 *
841 * This is exactly the same as SET_CONTROL_LINE_STATE from the PSTN
842 * CDC.
843 */
844 static int option_send_setup(struct usb_serial_port *port)
845 {
846 struct usb_serial *serial = port->serial;
847 struct option_port_private *portdata;
848 int ifNum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
849 dbg("%s", __func__);
850
851 portdata = usb_get_serial_port_data(port);
852
853 if (port->tty) {
854 int val = 0;
855 if (portdata->dtr_state)
856 val |= 0x01;
857 if (portdata->rts_state)
858 val |= 0x02;
859
860 return usb_control_msg(serial->dev,
861 usb_rcvctrlpipe(serial->dev, 0),
862 0x22,0x21,val,ifNum,NULL,0,USB_CTRL_SET_TIMEOUT);
863 }
864
865 return 0;
866 }
867
868 static int option_startup(struct usb_serial *serial)
869 {
870 int i, j, err;
871 struct usb_serial_port *port;
872 struct option_port_private *portdata;
873 u8 *buffer;
874
875 dbg("%s", __func__);
876
877 /* Now setup per port private data */
878 for (i = 0; i < serial->num_ports; i++) {
879 port = serial->port[i];
880 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
881 if (!portdata) {
882 dbg("%s: kmalloc for option_port_private (%d) failed!.",
883 __func__, i);
884 return (1);
885 }
886
887 for (j = 0; j < N_IN_URB; j++) {
888 buffer = (u8 *)__get_free_page(GFP_KERNEL);
889 if (!buffer)
890 goto bail_out_error;
891 portdata->in_buffer[j] = buffer;
892 }
893
894 for (j = 0; j < N_OUT_URB; j++) {
895 buffer = kmalloc(OUT_BUFLEN, GFP_KERNEL);
896 if (!buffer)
897 goto bail_out_error2;
898 portdata->out_buffer[j] = buffer;
899 }
900
901 usb_set_serial_port_data(port, portdata);
902
903 if (! port->interrupt_in_urb)
904 continue;
905 err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
906 if (err)
907 dbg("%s: submit irq_in urb failed %d",
908 __func__, err);
909 }
910
911 option_setup_urbs(serial);
912
913 return (0);
914
915 bail_out_error2:
916 for (j = 0; j < N_OUT_URB; j++)
917 kfree(portdata->out_buffer[j]);
918 bail_out_error:
919 for (j = 0; j < N_IN_URB; j++)
920 if (portdata->in_buffer[j])
921 free_page((unsigned long)portdata->in_buffer[j]);
922 kfree(portdata);
923 return 1;
924 }
925
926 static void option_shutdown(struct usb_serial *serial)
927 {
928 int i, j;
929 struct usb_serial_port *port;
930 struct option_port_private *portdata;
931
932 dbg("%s", __func__);
933
934 /* Stop reading/writing urbs */
935 for (i = 0; i < serial->num_ports; ++i) {
936 port = serial->port[i];
937 portdata = usb_get_serial_port_data(port);
938 for (j = 0; j < N_IN_URB; j++)
939 usb_kill_urb(portdata->in_urbs[j]);
940 for (j = 0; j < N_OUT_URB; j++)
941 usb_kill_urb(portdata->out_urbs[j]);
942 }
943
944 /* Now free them */
945 for (i = 0; i < serial->num_ports; ++i) {
946 port = serial->port[i];
947 portdata = usb_get_serial_port_data(port);
948
949 for (j = 0; j < N_IN_URB; j++) {
950 if (portdata->in_urbs[j]) {
951 usb_free_urb(portdata->in_urbs[j]);
952 free_page((unsigned long)portdata->in_buffer[j]);
953 portdata->in_urbs[j] = NULL;
954 }
955 }
956 for (j = 0; j < N_OUT_URB; j++) {
957 if (portdata->out_urbs[j]) {
958 usb_free_urb(portdata->out_urbs[j]);
959 kfree(portdata->out_buffer[j]);
960 portdata->out_urbs[j] = NULL;
961 }
962 }
963 }
964
965 /* Now free per port private data */
966 for (i = 0; i < serial->num_ports; i++) {
967 port = serial->port[i];
968 kfree(usb_get_serial_port_data(port));
969 }
970 }
971
972 MODULE_AUTHOR(DRIVER_AUTHOR);
973 MODULE_DESCRIPTION(DRIVER_DESC);
974 MODULE_VERSION(DRIVER_VERSION);
975 MODULE_LICENSE("GPL");
976
977 #ifdef CONFIG_USB_DEBUG
978 module_param(debug, bool, S_IRUGO | S_IWUSR);
979 MODULE_PARM_DESC(debug, "Debug messages");
980 #endif
981
Linux kernel - Deliverables
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