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Kevin Lloyd69de51f2006-06-30 11:17:55 -07001/*
Kevin Lloyd033a3fb2006-10-13 23:53:21 -07002 USB Driver for Sierra Wireless
3
Kevin Lloydf3564de2008-03-28 10:05:08 -07004 Copyright (C) 2006, 2007, 2008 Kevin Lloyd <klloyd@sierrawireless.com>
Kevin Lloyd033a3fb2006-10-13 23:53:21 -07005
6 IMPORTANT DISCLAIMER: This driver is not commercially supported by
7 Sierra Wireless. Use at your own risk.
8
9 This driver is free software; you can redistribute it and/or modify
10 it under the terms of Version 2 of the GNU General Public License as
11 published by the Free Software Foundation.
12
13 Portions based on the option driver by Matthias Urlichs <smurf@smurf.noris.de>
14 Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>
Kevin Lloyd033a3fb2006-10-13 23:53:21 -070015*/
16
Kevin Lloydf3564de2008-03-28 10:05:08 -070017#define DRIVER_VERSION "v.1.2.9c"
18#define DRIVER_AUTHOR "Kevin Lloyd <klloyd@sierrawireless.com>"
Kevin Lloyd033a3fb2006-10-13 23:53:21 -070019#define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
Kevin Lloyd69de51f2006-06-30 11:17:55 -070020
21#include <linux/kernel.h>
Kevin Lloyd033a3fb2006-10-13 23:53:21 -070022#include <linux/jiffies.h>
23#include <linux/errno.h>
Kevin Lloyd69de51f2006-06-30 11:17:55 -070024#include <linux/tty.h>
Kevin Lloyd033a3fb2006-10-13 23:53:21 -070025#include <linux/tty_flip.h>
Kevin Lloyd69de51f2006-06-30 11:17:55 -070026#include <linux/module.h>
27#include <linux/usb.h>
Greg Kroah-Hartmana9698882006-07-11 21:22:58 -070028#include <linux/usb/serial.h>
Kevin Lloyd228426e2008-01-10 11:11:04 -080029#include <linux/usb/ch9.h>
Kevin Lloyd69de51f2006-06-30 11:17:55 -070030
Kevin Lloyd228426e2008-01-10 11:11:04 -080031#define SWIMS_USB_REQUEST_SetPower 0x00
32#define SWIMS_USB_REQUEST_SetNmea 0x07
Kevin Lloyd112225b2007-07-16 13:49:27 -070033#define SWIMS_USB_REQUEST_SetMode 0x0B
Kevin Lloyd112225b2007-07-16 13:49:27 -070034#define SWIMS_SET_MODE_Modem 0x0001
35
36/* per port private data */
37#define N_IN_URB 4
38#define N_OUT_URB 4
39#define IN_BUFLEN 4096
40
41static int debug;
Kevin Lloyd228426e2008-01-10 11:11:04 -080042static int nmea;
43static int truinstall = 1;
Kevin Lloyd112225b2007-07-16 13:49:27 -070044
45enum devicetype {
46 DEVICE_3_PORT = 0,
47 DEVICE_1_PORT = 1,
48 DEVICE_INSTALLER = 2,
49};
50
Adrian Bunk82a24e62007-07-29 16:59:02 +020051static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
Kevin Lloyd112225b2007-07-16 13:49:27 -070052{
53 int result;
Joe Perches898eb712007-10-18 03:06:30 -070054 dev_dbg(&udev->dev, "%s", "SET POWER STATE\n");
Kevin Lloyd112225b2007-07-16 13:49:27 -070055 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
Kevin Lloyd228426e2008-01-10 11:11:04 -080056 SWIMS_USB_REQUEST_SetPower, /* __u8 request */
Kevin Lloydf3564de2008-03-28 10:05:08 -070057 USB_TYPE_VENDOR, /* __u8 request type */
Kevin Lloyd228426e2008-01-10 11:11:04 -080058 swiState, /* __u16 value */
59 0, /* __u16 index */
60 NULL, /* void *data */
61 0, /* __u16 size */
62 USB_CTRL_SET_TIMEOUT); /* int timeout */
Kevin Lloyd112225b2007-07-16 13:49:27 -070063 return result;
64}
65
Kevin Lloyd228426e2008-01-10 11:11:04 -080066static int sierra_set_ms_mode(struct usb_device *udev, __u16 eSWocMode)
Kevin Lloyd112225b2007-07-16 13:49:27 -070067{
68 int result;
Joe Perches898eb712007-10-18 03:06:30 -070069 dev_dbg(&udev->dev, "%s", "DEVICE MODE SWITCH\n");
Kevin Lloyd112225b2007-07-16 13:49:27 -070070 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
71 SWIMS_USB_REQUEST_SetMode, /* __u8 request */
Kevin Lloydf3564de2008-03-28 10:05:08 -070072 USB_TYPE_VENDOR, /* __u8 request type */
Kevin Lloyd228426e2008-01-10 11:11:04 -080073 eSWocMode, /* __u16 value */
74 0x0000, /* __u16 index */
Kevin Lloyd112225b2007-07-16 13:49:27 -070075 NULL, /* void *data */
76 0, /* __u16 size */
77 USB_CTRL_SET_TIMEOUT); /* int timeout */
78 return result;
79}
80
Kevin Lloyd228426e2008-01-10 11:11:04 -080081static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
Kevin Lloyd112225b2007-07-16 13:49:27 -070082{
83 int result;
Kevin Lloyd228426e2008-01-10 11:11:04 -080084 dev_dbg(&udev->dev, "%s", "NMEA Enable sent\n");
85 result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
86 SWIMS_USB_REQUEST_SetNmea, /* __u8 request */
Kevin Lloydf3564de2008-03-28 10:05:08 -070087 USB_TYPE_VENDOR, /* __u8 request type */
Kevin Lloyd228426e2008-01-10 11:11:04 -080088 enable, /* __u16 value */
89 0x0000, /* __u16 index */
90 NULL, /* void *data */
91 0, /* __u16 size */
92 USB_CTRL_SET_TIMEOUT); /* int timeout */
93 return result;
94}
Kevin Lloyd112225b2007-07-16 13:49:27 -070095
Kevin Lloyd228426e2008-01-10 11:11:04 -080096static int sierra_calc_num_ports(struct usb_serial *serial)
97{
98 int result;
99 int *num_ports = usb_get_serial_data(serial);
Kevin Lloyd112225b2007-07-16 13:49:27 -0700100
Kevin Lloyd228426e2008-01-10 11:11:04 -0800101 result = *num_ports;
102
103 if (result) {
104 kfree(num_ports);
105 usb_set_serial_data(serial, NULL);
Kevin Lloyd112225b2007-07-16 13:49:27 -0700106 }
107
Kevin Lloyd228426e2008-01-10 11:11:04 -0800108 return result;
109}
110
Kevin Lloyd71069672008-04-02 11:24:56 -0700111static int sierra_calc_interface(struct usb_serial *serial)
112{
113 int interface;
114 struct usb_interface *p_interface;
115 struct usb_host_interface *p_host_interface;
116
117 /* Get the interface structure pointer from the serial struct */
118 p_interface = serial->interface;
119
120 /* Get a pointer to the host interface structure */
121 p_host_interface = p_interface->cur_altsetting;
122
123 /* read the interface descriptor for this active altsetting
124 * to find out the interface number we are on
125 */
126 interface = p_host_interface->desc.bInterfaceNumber;
127
128 return interface;
129}
130
Kevin Lloyd228426e2008-01-10 11:11:04 -0800131static int sierra_probe(struct usb_serial *serial,
132 const struct usb_device_id *id)
133{
134 int result = 0;
135 struct usb_device *udev;
136 int *num_ports;
137 u8 ifnum;
138
139 num_ports = kmalloc(sizeof(*num_ports), GFP_KERNEL);
140 if (!num_ports)
141 return -ENOMEM;
142
143 ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
144 udev = serial->dev;
145
Kevin Lloyd71069672008-04-02 11:24:56 -0700146 /* Figure out the interface number from the serial structure */
147 ifnum = sierra_calc_interface(serial);
148
149 /*
150 * If this interface supports more than 1 alternate
151 * select the 2nd one
152 */
153 if (serial->interface->num_altsetting == 2) {
154 dev_dbg(&udev->dev,
155 "Selecting alt setting for interface %d\n",
156 ifnum);
157
158 /* We know the alternate setting is 1 for the MC8785 */
159 usb_set_interface(udev, ifnum, 1);
160 }
161
Kevin Lloyd228426e2008-01-10 11:11:04 -0800162 /* Check if in installer mode */
163 if (truinstall && id->driver_info == DEVICE_INSTALLER) {
164 dev_dbg(&udev->dev, "%s", "FOUND TRU-INSTALL DEVICE(SW)\n");
165 result = sierra_set_ms_mode(udev, SWIMS_SET_MODE_Modem);
166 /* Don't bind to the device when in installer mode */
167 kfree(num_ports);
168 return -EIO;
169 } else if (id->driver_info == DEVICE_1_PORT)
170 *num_ports = 1;
171 else if (ifnum == 0x99)
172 *num_ports = 0;
173 else
174 *num_ports = 3;
175 /*
176 * save off our num_ports info so that we can use it in the
177 * calc_num_ports callback
178 */
179 usb_set_serial_data(serial, (void *)num_ports);
180
181 return result;
Kevin Lloyd112225b2007-07-16 13:49:27 -0700182}
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700183
Kevin Lloyd69de51f2006-06-30 11:17:55 -0700184static struct usb_device_id id_table [] = {
Kevin Lloyd69de51f2006-06-30 11:17:55 -0700185 { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
Kevin Lloyde43062d2007-01-17 16:04:18 -0800186 { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
Greg Kroah-Hartman90ac3c82002-04-09 12:14:34 -0700187 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
Kevin Lloyd9454c462007-07-16 13:49:29 -0700188 { USB_DEVICE(0x0f30, 0x1b1d) }, /* Sierra Wireless MC5720 */
Kevin Lloyde43062d2007-01-17 16:04:18 -0800189 { USB_DEVICE(0x1199, 0x0020) }, /* Sierra Wireless MC5725 */
agilmore@wirelessbeehive.comb9e13ac2007-12-04 11:37:12 -0700190 { USB_DEVICE(0x1199, 0x0220) }, /* Sierra Wireless MC5725 */
Kevin Lloyde43062d2007-01-17 16:04:18 -0800191 { USB_DEVICE(0x1199, 0x0019) }, /* Sierra Wireless AirCard 595 */
192 { USB_DEVICE(0x1199, 0x0021) }, /* Sierra Wireless AirCard 597E */
Kevin Lloyd9454c462007-07-16 13:49:29 -0700193 { USB_DEVICE(0x1199, 0x0120) }, /* Sierra Wireless USB Dongle 595U */
Kevin Lloyd69a90f82008-03-31 10:20:54 -0700194 { USB_DEVICE_AND_INTERFACE_INFO(0x1199, 0x0023, 0xFF, 0xFF, 0xFF) }, /* Sierra Wireless C597 */
Kevin Lloyd9454c462007-07-16 13:49:29 -0700195
Kevin Lloyd69de51f2006-06-30 11:17:55 -0700196 { USB_DEVICE(0x1199, 0x6802) }, /* Sierra Wireless MC8755 */
Kevin Lloyde43062d2007-01-17 16:04:18 -0800197 { USB_DEVICE(0x1199, 0x6804) }, /* Sierra Wireless MC8755 */
Kevin Lloyd69de51f2006-06-30 11:17:55 -0700198 { USB_DEVICE(0x1199, 0x6803) }, /* Sierra Wireless MC8765 */
Kevin Lloyd9454c462007-07-16 13:49:29 -0700199 { USB_DEVICE(0x1199, 0x6812) }, /* Sierra Wireless MC8775 & AC 875U */
Kevin R Pageed0ccdb2007-12-13 01:10:48 +0000200 { USB_DEVICE(0x1199, 0x6813) }, /* Sierra Wireless MC8775 (Thinkpad internal) */
Kevin Lloyd7f170a62008-03-14 00:53:24 -0700201 { USB_DEVICE(0x1199, 0x6815) }, /* Sierra Wireless MC8775 */
Stefan Seyfried8f7f85e2008-04-17 07:47:34 +0200202 { USB_DEVICE(0x03f0, 0x1e1d) }, /* HP hs2300 a.k.a MC8775 */
Kevin Lloyd69de51f2006-06-30 11:17:55 -0700203 { USB_DEVICE(0x1199, 0x6820) }, /* Sierra Wireless AirCard 875 */
Kevin Lloyd71069672008-04-02 11:24:56 -0700204 { USB_DEVICE(0x1199, 0x6821) }, /* Sierra Wireless AirCard 875U */
Kevin Lloyd9454c462007-07-16 13:49:29 -0700205 { USB_DEVICE(0x1199, 0x6832) }, /* Sierra Wireless MC8780*/
206 { USB_DEVICE(0x1199, 0x6833) }, /* Sierra Wireless MC8781*/
Kevin Lloyd71069672008-04-02 11:24:56 -0700207 { USB_DEVICE(0x1199, 0x683B), .driver_info = DEVICE_1_PORT }, /* Sierra Wireless MC8785 Composite*/
Kevin Lloyd9454c462007-07-16 13:49:29 -0700208 { USB_DEVICE(0x1199, 0x6850) }, /* Sierra Wireless AirCard 880 */
209 { USB_DEVICE(0x1199, 0x6851) }, /* Sierra Wireless AirCard 881 */
210 { USB_DEVICE(0x1199, 0x6852) }, /* Sierra Wireless AirCard 880 E */
211 { USB_DEVICE(0x1199, 0x6853) }, /* Sierra Wireless AirCard 881 E */
Kevin Lloyd6835b322008-01-10 11:11:04 -0800212 { USB_DEVICE(0x1199, 0x6855) }, /* Sierra Wireless AirCard 880 U */
Jessica L. Blank62aad3a2007-12-30 20:11:35 -0600213 { USB_DEVICE(0x1199, 0x6856) }, /* Sierra Wireless AirCard 881 U */
Kevin Lloyd71069672008-04-02 11:24:56 -0700214 { USB_DEVICE(0x1199, 0x6859), .driver_info = DEVICE_1_PORT }, /* Sierra Wireless AirCard 885 E */
215 { USB_DEVICE(0x1199, 0x685A), .driver_info = DEVICE_1_PORT }, /* Sierra Wireless AirCard 885 E */
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700216
Kevin Lloyd6835b322008-01-10 11:11:04 -0800217 { USB_DEVICE(0x1199, 0x6468) }, /* Sierra Wireless MP3G - EVDO */
218 { USB_DEVICE(0x1199, 0x6469) }, /* Sierra Wireless MP3G - UMTS/HSPA */
219
Kevin Lloyd112225b2007-07-16 13:49:27 -0700220 { USB_DEVICE(0x1199, 0x0112), .driver_info = DEVICE_1_PORT }, /* Sierra Wireless AirCard 580 */
221 { USB_DEVICE(0x0F3D, 0x0112), .driver_info = DEVICE_1_PORT }, /* Airprime/Sierra PC 5220 */
222
223 { USB_DEVICE(0x1199, 0x0FFF), .driver_info = DEVICE_INSTALLER},
Kevin Lloyd69de51f2006-06-30 11:17:55 -0700224 { }
225};
Greg Kroah-Hartman964ee1d2006-10-17 10:17:58 -0700226MODULE_DEVICE_TABLE(usb, id_table);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700227
Kevin Lloyd69de51f2006-06-30 11:17:55 -0700228static struct usb_driver sierra_driver = {
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700229 .name = "sierra",
Kevin Lloyd228426e2008-01-10 11:11:04 -0800230 .probe = usb_serial_probe,
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700231 .disconnect = usb_serial_disconnect,
232 .id_table = id_table,
Greg Kroah-Hartman964ee1d2006-10-17 10:17:58 -0700233 .no_dynamic_id = 1,
Kevin Lloyd69de51f2006-06-30 11:17:55 -0700234};
235
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700236struct sierra_port_private {
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900237 spinlock_t lock; /* lock the structure */
238 int outstanding_urbs; /* number of out urbs in flight */
239
Oliver Neukum4f4f9c52008-03-14 00:53:24 -0700240 /* Input endpoints and buffers for this port */
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700241 struct urb *in_urbs[N_IN_URB];
Oliver Neukum4f4f9c52008-03-14 00:53:24 -0700242 char *in_buffer[N_IN_URB];
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700243
244 /* Settings for the port */
245 int rts_state; /* Handshaking pins (outputs) */
246 int dtr_state;
247 int cts_state; /* Handshaking pins (inputs) */
248 int dsr_state;
249 int dcd_state;
250 int ri_state;
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700251};
252
Greg Kroah-Hartman964ee1d2006-10-17 10:17:58 -0700253static int sierra_send_setup(struct usb_serial_port *port)
Kevin Lloyd69de51f2006-06-30 11:17:55 -0700254{
Greg Kroah-Hartman964ee1d2006-10-17 10:17:58 -0700255 struct usb_serial *serial = port->serial;
256 struct sierra_port_private *portdata;
Kevin Lloyd228426e2008-01-10 11:11:04 -0800257 __u16 interface = 0;
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700258
Harvey Harrison441b62c2008-03-03 16:08:34 -0800259 dbg("%s", __func__);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700260
Greg Kroah-Hartman964ee1d2006-10-17 10:17:58 -0700261 portdata = usb_get_serial_port_data(port);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700262
Greg Kroah-Hartman964ee1d2006-10-17 10:17:58 -0700263 if (port->tty) {
264 int val = 0;
265 if (portdata->dtr_state)
266 val |= 0x01;
267 if (portdata->rts_state)
268 val |= 0x02;
269
Kevin Lloyd228426e2008-01-10 11:11:04 -0800270 /* Determine which port is targeted */
271 if (port->bulk_out_endpointAddress == 2)
272 interface = 0;
273 else if (port->bulk_out_endpointAddress == 4)
274 interface = 1;
275 else if (port->bulk_out_endpointAddress == 5)
276 interface = 2;
277
Greg Kroah-Hartman964ee1d2006-10-17 10:17:58 -0700278 return usb_control_msg(serial->dev,
279 usb_rcvctrlpipe(serial->dev, 0),
Kevin Lloyd228426e2008-01-10 11:11:04 -0800280 0x22, 0x21, val, interface,
281 NULL, 0, USB_CTRL_SET_TIMEOUT);
Greg Kroah-Hartman964ee1d2006-10-17 10:17:58 -0700282 }
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700283
284 return 0;
Kevin Lloyd69de51f2006-06-30 11:17:55 -0700285}
286
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700287static void sierra_rx_throttle(struct usb_serial_port *port)
288{
Harvey Harrison441b62c2008-03-03 16:08:34 -0800289 dbg("%s", __func__);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700290}
291
292static void sierra_rx_unthrottle(struct usb_serial_port *port)
293{
Harvey Harrison441b62c2008-03-03 16:08:34 -0800294 dbg("%s", __func__);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700295}
296
297static void sierra_break_ctl(struct usb_serial_port *port, int break_state)
298{
299 /* Unfortunately, I don't know how to send a break */
Harvey Harrison441b62c2008-03-03 16:08:34 -0800300 dbg("%s", __func__);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700301}
302
303static void sierra_set_termios(struct usb_serial_port *port,
Alan Cox606d0992006-12-08 02:38:45 -0800304 struct ktermios *old_termios)
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700305{
Harvey Harrison441b62c2008-03-03 16:08:34 -0800306 dbg("%s", __func__);
Alan Coxed1f12e2007-10-18 01:24:22 -0700307 tty_termios_copy_hw(port->tty->termios, old_termios);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700308 sierra_send_setup(port);
309}
310
311static int sierra_tiocmget(struct usb_serial_port *port, struct file *file)
312{
313 unsigned int value;
314 struct sierra_port_private *portdata;
315
316 portdata = usb_get_serial_port_data(port);
317
318 value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
319 ((portdata->dtr_state) ? TIOCM_DTR : 0) |
320 ((portdata->cts_state) ? TIOCM_CTS : 0) |
321 ((portdata->dsr_state) ? TIOCM_DSR : 0) |
322 ((portdata->dcd_state) ? TIOCM_CAR : 0) |
323 ((portdata->ri_state) ? TIOCM_RNG : 0);
324
325 return value;
326}
327
328static int sierra_tiocmset(struct usb_serial_port *port, struct file *file,
329 unsigned int set, unsigned int clear)
330{
331 struct sierra_port_private *portdata;
332
333 portdata = usb_get_serial_port_data(port);
334
335 if (set & TIOCM_RTS)
336 portdata->rts_state = 1;
337 if (set & TIOCM_DTR)
338 portdata->dtr_state = 1;
339
340 if (clear & TIOCM_RTS)
341 portdata->rts_state = 0;
342 if (clear & TIOCM_DTR)
343 portdata->dtr_state = 0;
344 return sierra_send_setup(port);
345}
346
347static int sierra_ioctl(struct usb_serial_port *port, struct file *file,
348 unsigned int cmd, unsigned long arg)
349{
350 return -ENOIOCTLCMD;
351}
352
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900353static void sierra_outdat_callback(struct urb *urb)
354{
355 struct usb_serial_port *port = urb->context;
356 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
357 int status = urb->status;
358 unsigned long flags;
359
Harvey Harrison441b62c2008-03-03 16:08:34 -0800360 dbg("%s - port %d", __func__, port->number);
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900361
362 /* free up the transfer buffer, as usb_free_urb() does not do this */
363 kfree(urb->transfer_buffer);
364
365 if (status)
366 dbg("%s - nonzero write bulk status received: %d",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800367 __func__, status);
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900368
369 spin_lock_irqsave(&portdata->lock, flags);
370 --portdata->outstanding_urbs;
371 spin_unlock_irqrestore(&portdata->lock, flags);
372
373 usb_serial_port_softint(port);
374}
375
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700376/* Write */
377static int sierra_write(struct usb_serial_port *port,
378 const unsigned char *buf, int count)
379{
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900380 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
381 struct usb_serial *serial = port->serial;
382 unsigned long flags;
383 unsigned char *buffer;
384 struct urb *urb;
385 int status;
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700386
387 portdata = usb_get_serial_port_data(port);
388
Harvey Harrison441b62c2008-03-03 16:08:34 -0800389 dbg("%s: write (%d chars)", __func__, count);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700390
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900391 spin_lock_irqsave(&portdata->lock, flags);
392 if (portdata->outstanding_urbs > N_OUT_URB) {
393 spin_unlock_irqrestore(&portdata->lock, flags);
Harvey Harrison441b62c2008-03-03 16:08:34 -0800394 dbg("%s - write limit hit\n", __func__);
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900395 return 0;
396 }
397 portdata->outstanding_urbs++;
398 spin_unlock_irqrestore(&portdata->lock, flags);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700399
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900400 buffer = kmalloc(count, GFP_ATOMIC);
401 if (!buffer) {
402 dev_err(&port->dev, "out of memory\n");
403 count = -ENOMEM;
404 goto error_no_buffer;
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700405 }
406
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900407 urb = usb_alloc_urb(0, GFP_ATOMIC);
408 if (!urb) {
409 dev_err(&port->dev, "no more free urbs\n");
410 count = -ENOMEM;
411 goto error_no_urb;
412 }
413
414 memcpy(buffer, buf, count);
415
Harvey Harrison441b62c2008-03-03 16:08:34 -0800416 usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900417
418 usb_fill_bulk_urb(urb, serial->dev,
419 usb_sndbulkpipe(serial->dev,
420 port->bulk_out_endpointAddress),
421 buffer, count, sierra_outdat_callback, port);
422
423 /* send it down the pipe */
424 status = usb_submit_urb(urb, GFP_ATOMIC);
425 if (status) {
426 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
Harvey Harrison441b62c2008-03-03 16:08:34 -0800427 "with status = %d\n", __func__, status);
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900428 count = status;
429 goto error;
430 }
431
432 /* we are done with this urb, so let the host driver
433 * really free it when it is finished with it */
434 usb_free_urb(urb);
435
436 return count;
437error:
438 usb_free_urb(urb);
439error_no_urb:
440 kfree(buffer);
441error_no_buffer:
442 spin_lock_irqsave(&portdata->lock, flags);
443 --portdata->outstanding_urbs;
444 spin_unlock_irqrestore(&portdata->lock, flags);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700445 return count;
446}
447
448static void sierra_indat_callback(struct urb *urb)
449{
450 int err;
451 int endpoint;
452 struct usb_serial_port *port;
453 struct tty_struct *tty;
454 unsigned char *data = urb->transfer_buffer;
Greg Kroah-Hartman17dd2212007-06-15 15:44:13 -0700455 int status = urb->status;
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700456
Harvey Harrison441b62c2008-03-03 16:08:34 -0800457 dbg("%s: %p", __func__, urb);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700458
459 endpoint = usb_pipeendpoint(urb->pipe);
Ming Leicdc97792008-02-24 18:41:47 +0800460 port = urb->context;
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700461
Greg Kroah-Hartman17dd2212007-06-15 15:44:13 -0700462 if (status) {
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700463 dbg("%s: nonzero status: %d on endpoint %02x.",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800464 __func__, status, endpoint);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700465 } else {
466 tty = port->tty;
467 if (urb->actual_length) {
468 tty_buffer_request_room(tty, urb->actual_length);
469 tty_insert_flip_string(tty, data, urb->actual_length);
470 tty_flip_buffer_push(tty);
471 } else {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800472 dbg("%s: empty read urb received", __func__);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700473 }
474
475 /* Resubmit urb so we continue receiving */
Greg Kroah-Hartman17dd2212007-06-15 15:44:13 -0700476 if (port->open_count && status != -ESHUTDOWN) {
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700477 err = usb_submit_urb(urb, GFP_ATOMIC);
478 if (err)
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900479 dev_err(&port->dev, "resubmit read urb failed."
Joe Perches898eb712007-10-18 03:06:30 -0700480 "(%d)\n", err);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700481 }
482 }
483 return;
484}
485
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700486static void sierra_instat_callback(struct urb *urb)
487{
488 int err;
Greg Kroah-Hartman17dd2212007-06-15 15:44:13 -0700489 int status = urb->status;
Ming Leicdc97792008-02-24 18:41:47 +0800490 struct usb_serial_port *port = urb->context;
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700491 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
492 struct usb_serial *serial = port->serial;
493
Harvey Harrison441b62c2008-03-03 16:08:34 -0800494 dbg("%s", __func__);
495 dbg("%s: urb %p port %p has data %p", __func__, urb, port, portdata);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700496
Greg Kroah-Hartman17dd2212007-06-15 15:44:13 -0700497 if (status == 0) {
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700498 struct usb_ctrlrequest *req_pkt =
499 (struct usb_ctrlrequest *)urb->transfer_buffer;
500
501 if (!req_pkt) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800502 dbg("%s: NULL req_pkt\n", __func__);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700503 return;
504 }
505 if ((req_pkt->bRequestType == 0xA1) &&
506 (req_pkt->bRequest == 0x20)) {
507 int old_dcd_state;
508 unsigned char signals = *((unsigned char *)
509 urb->transfer_buffer +
510 sizeof(struct usb_ctrlrequest));
511
Harvey Harrison441b62c2008-03-03 16:08:34 -0800512 dbg("%s: signal x%x", __func__, signals);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700513
514 old_dcd_state = portdata->dcd_state;
515 portdata->cts_state = 1;
516 portdata->dcd_state = ((signals & 0x01) ? 1 : 0);
517 portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
518 portdata->ri_state = ((signals & 0x08) ? 1 : 0);
519
520 if (port->tty && !C_CLOCAL(port->tty) &&
521 old_dcd_state && !portdata->dcd_state)
522 tty_hangup(port->tty);
523 } else {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800524 dbg("%s: type %x req %x", __func__,
Kevin Lloydf3564de2008-03-28 10:05:08 -0700525 req_pkt->bRequestType, req_pkt->bRequest);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700526 }
527 } else
Harvey Harrison441b62c2008-03-03 16:08:34 -0800528 dbg("%s: error %d", __func__, status);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700529
530 /* Resubmit urb so we continue receiving IRQ data */
Greg Kroah-Hartman17dd2212007-06-15 15:44:13 -0700531 if (status != -ESHUTDOWN) {
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700532 urb->dev = serial->dev;
533 err = usb_submit_urb(urb, GFP_ATOMIC);
534 if (err)
535 dbg("%s: resubmit intr urb failed. (%d)",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800536 __func__, err);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700537 }
538}
539
540static int sierra_write_room(struct usb_serial_port *port)
541{
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900542 struct sierra_port_private *portdata = usb_get_serial_port_data(port);
543 unsigned long flags;
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700544
Harvey Harrison441b62c2008-03-03 16:08:34 -0800545 dbg("%s - port %d", __func__, port->number);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700546
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900547 /* try to give a good number back based on if we have any free urbs at
548 * this point in time */
549 spin_lock_irqsave(&portdata->lock, flags);
550 if (portdata->outstanding_urbs > N_OUT_URB * 2 / 3) {
551 spin_unlock_irqrestore(&portdata->lock, flags);
Harvey Harrison441b62c2008-03-03 16:08:34 -0800552 dbg("%s - write limit hit\n", __func__);
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900553 return 0;
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700554 }
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900555 spin_unlock_irqrestore(&portdata->lock, flags);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700556
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900557 return 2048;
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700558}
559
560static int sierra_chars_in_buffer(struct usb_serial_port *port)
561{
Harvey Harrison441b62c2008-03-03 16:08:34 -0800562 dbg("%s - port %d", __func__, port->number);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700563
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900564 /*
565 * We can't really account for how much data we
566 * have sent out, but hasn't made it through to the
567 * device as we can't see the backend here, so just
568 * tell the tty layer that everything is flushed.
Alan Coxa5b6f602008-04-08 17:16:06 +0100569 *
570 * FIXME: should walk the outstanding urbs info
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900571 */
572 return 0;
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700573}
574
575static int sierra_open(struct usb_serial_port *port, struct file *filp)
576{
577 struct sierra_port_private *portdata;
578 struct usb_serial *serial = port->serial;
Greg Kroah-Hartman9e85c5f2007-06-20 14:22:23 +0900579 int i;
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700580 struct urb *urb;
Kevin Lloyde43062d2007-01-17 16:04:18 -0800581 int result;
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700582
583 portdata = usb_get_serial_port_data(port);
584
Harvey Harrison441b62c2008-03-03 16:08:34 -0800585 dbg("%s", __func__);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700586
587 /* Set some sane defaults */
588 portdata->rts_state = 1;
589 portdata->dtr_state = 1;
590
591 /* Reset low level data toggle and start reading from endpoints */
592 for (i = 0; i < N_IN_URB; i++) {
593 urb = portdata->in_urbs[i];
Greg Kroah-Hartman9e85c5f2007-06-20 14:22:23 +0900594 if (!urb)
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700595 continue;
596 if (urb->dev != serial->dev) {
Harvey Harrison441b62c2008-03-03 16:08:34 -0800597 dbg("%s: dev %p != %p", __func__,
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700598 urb->dev, serial->dev);
599 continue;
600 }
601
602 /*
603 * make sure endpoint data toggle is synchronized with the
604 * device
605 */
606 usb_clear_halt(urb->dev, urb->pipe);
607
Greg Kroah-Hartman9e85c5f2007-06-20 14:22:23 +0900608 result = usb_submit_urb(urb, GFP_KERNEL);
609 if (result) {
Joe Perches898eb712007-10-18 03:06:30 -0700610 dev_err(&port->dev, "submit urb %d failed (%d) %d\n",
Greg Kroah-Hartman9e85c5f2007-06-20 14:22:23 +0900611 i, result, urb->transfer_buffer_length);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700612 }
613 }
614
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700615 port->tty->low_latency = 1;
616
617 sierra_send_setup(port);
618
Greg Kroah-Hartman9e85c5f2007-06-20 14:22:23 +0900619 /* start up the interrupt endpoint if we have one */
620 if (port->interrupt_in_urb) {
621 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
622 if (result)
Joe Perches898eb712007-10-18 03:06:30 -0700623 dev_err(&port->dev, "submit irq_in urb failed %d\n",
Greg Kroah-Hartman9e85c5f2007-06-20 14:22:23 +0900624 result);
625 }
626 return 0;
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700627}
628
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700629static void sierra_close(struct usb_serial_port *port, struct file *filp)
630{
631 int i;
632 struct usb_serial *serial = port->serial;
633 struct sierra_port_private *portdata;
634
Harvey Harrison441b62c2008-03-03 16:08:34 -0800635 dbg("%s", __func__);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700636 portdata = usb_get_serial_port_data(port);
637
638 portdata->rts_state = 0;
639 portdata->dtr_state = 0;
640
641 if (serial->dev) {
Oliver Neukume33fe4d2008-01-21 17:44:10 +0100642 mutex_lock(&serial->disc_mutex);
643 if (!serial->disconnected)
644 sierra_send_setup(port);
645 mutex_unlock(&serial->disc_mutex);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700646
647 /* Stop reading/writing urbs */
648 for (i = 0; i < N_IN_URB; i++)
Greg Kroah-Hartman9e85c5f2007-06-20 14:22:23 +0900649 usb_kill_urb(portdata->in_urbs[i]);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700650 }
Greg Kroah-Hartman9e85c5f2007-06-20 14:22:23 +0900651
652 usb_kill_urb(port->interrupt_in_urb);
653
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700654 port->tty = NULL;
655}
656
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700657static int sierra_startup(struct usb_serial *serial)
658{
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700659 struct usb_serial_port *port;
660 struct sierra_port_private *portdata;
Greg Kroah-Hartman9e85c5f2007-06-20 14:22:23 +0900661 struct urb *urb;
662 int i;
663 int j;
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700664
Harvey Harrison441b62c2008-03-03 16:08:34 -0800665 dbg("%s", __func__);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700666
Kevin Lloyd228426e2008-01-10 11:11:04 -0800667 /* Set Device mode to D0 */
Kevin Lloyd112225b2007-07-16 13:49:27 -0700668 sierra_set_power_state(serial->dev, 0x0000);
669
Kevin Lloyd228426e2008-01-10 11:11:04 -0800670 /* Check NMEA and set */
671 if (nmea)
672 sierra_vsc_set_nmea(serial->dev, 1);
673
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700674 /* Now setup per port private data */
675 for (i = 0; i < serial->num_ports; i++) {
676 port = serial->port[i];
677 portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
678 if (!portdata) {
679 dbg("%s: kmalloc for sierra_port_private (%d) failed!.",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800680 __func__, i);
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900681 return -ENOMEM;
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700682 }
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900683 spin_lock_init(&portdata->lock);
Oliver Neukum4f4f9c52008-03-14 00:53:24 -0700684 for (j = 0; j < N_IN_URB; j++) {
685 portdata->in_buffer[j] = kmalloc(IN_BUFLEN, GFP_KERNEL);
686 if (!portdata->in_buffer[j]) {
687 for (--j; j >= 0; j--)
688 kfree(portdata->in_buffer[j]);
689 kfree(portdata);
690 return -ENOMEM;
691 }
692 }
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700693
694 usb_set_serial_port_data(port, portdata);
695
Greg Kroah-Hartman9e85c5f2007-06-20 14:22:23 +0900696 /* initialize the in urbs */
697 for (j = 0; j < N_IN_URB; ++j) {
698 urb = usb_alloc_urb(0, GFP_KERNEL);
699 if (urb == NULL) {
700 dbg("%s: alloc for in port failed.",
Harvey Harrison441b62c2008-03-03 16:08:34 -0800701 __func__);
Greg Kroah-Hartman9e85c5f2007-06-20 14:22:23 +0900702 continue;
703 }
704 /* Fill URB using supplied data. */
705 usb_fill_bulk_urb(urb, serial->dev,
706 usb_rcvbulkpipe(serial->dev,
707 port->bulk_in_endpointAddress),
708 portdata->in_buffer[j], IN_BUFLEN,
709 sierra_indat_callback, port);
710 portdata->in_urbs[j] = urb;
711 }
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700712 }
713
Greg Kroah-Hartman17c23272007-06-20 14:22:23 +0900714 return 0;
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700715}
716
717static void sierra_shutdown(struct usb_serial *serial)
718{
719 int i, j;
720 struct usb_serial_port *port;
721 struct sierra_port_private *portdata;
722
Harvey Harrison441b62c2008-03-03 16:08:34 -0800723 dbg("%s", __func__);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700724
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700725 for (i = 0; i < serial->num_ports; ++i) {
726 port = serial->port[i];
Greg Kroah-Hartmanf094e4f2007-04-26 00:12:01 -0700727 if (!port)
728 continue;
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700729 portdata = usb_get_serial_port_data(port);
Greg Kroah-Hartmanf094e4f2007-04-26 00:12:01 -0700730 if (!portdata)
731 continue;
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700732
733 for (j = 0; j < N_IN_URB; j++) {
Greg Kroah-Hartman9e85c5f2007-06-20 14:22:23 +0900734 usb_kill_urb(portdata->in_urbs[j]);
735 usb_free_urb(portdata->in_urbs[j]);
Oliver Neukum4f4f9c52008-03-14 00:53:24 -0700736 kfree(portdata->in_buffer[j]);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700737 }
Greg Kroah-Hartman9e85c5f2007-06-20 14:22:23 +0900738 kfree(portdata);
739 usb_set_serial_port_data(port, NULL);
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700740 }
741}
742
Kevin Lloyd228426e2008-01-10 11:11:04 -0800743static struct usb_serial_driver sierra_device = {
Greg Kroah-Hartman964ee1d2006-10-17 10:17:58 -0700744 .driver = {
745 .owner = THIS_MODULE,
746 .name = "sierra1",
747 },
Kevin Lloyd228426e2008-01-10 11:11:04 -0800748 .description = "Sierra USB modem",
749 .id_table = id_table,
Johannes Hölzld9b1b782006-12-17 21:50:24 +0100750 .usb_driver = &sierra_driver,
Kevin Lloyd228426e2008-01-10 11:11:04 -0800751 .calc_num_ports = sierra_calc_num_ports,
752 .probe = sierra_probe,
Greg Kroah-Hartman964ee1d2006-10-17 10:17:58 -0700753 .open = sierra_open,
754 .close = sierra_close,
755 .write = sierra_write,
756 .write_room = sierra_write_room,
757 .chars_in_buffer = sierra_chars_in_buffer,
758 .throttle = sierra_rx_throttle,
759 .unthrottle = sierra_rx_unthrottle,
760 .ioctl = sierra_ioctl,
761 .set_termios = sierra_set_termios,
762 .break_ctl = sierra_break_ctl,
763 .tiocmget = sierra_tiocmget,
764 .tiocmset = sierra_tiocmset,
765 .attach = sierra_startup,
766 .shutdown = sierra_shutdown,
767 .read_int_callback = sierra_instat_callback,
768};
769
770/* Functions used by new usb-serial code. */
771static int __init sierra_init(void)
772{
773 int retval;
Kevin Lloyd228426e2008-01-10 11:11:04 -0800774 retval = usb_serial_register(&sierra_device);
Greg Kroah-Hartman964ee1d2006-10-17 10:17:58 -0700775 if (retval)
Kevin Lloyd228426e2008-01-10 11:11:04 -0800776 goto failed_device_register;
Greg Kroah-Hartman964ee1d2006-10-17 10:17:58 -0700777
778
779 retval = usb_register(&sierra_driver);
780 if (retval)
781 goto failed_driver_register;
782
783 info(DRIVER_DESC ": " DRIVER_VERSION);
784
785 return 0;
786
787failed_driver_register:
Kevin Lloyd228426e2008-01-10 11:11:04 -0800788 usb_serial_deregister(&sierra_device);
789failed_device_register:
Greg Kroah-Hartman964ee1d2006-10-17 10:17:58 -0700790 return retval;
791}
792
793static void __exit sierra_exit(void)
794{
795 usb_deregister (&sierra_driver);
Kevin Lloyd228426e2008-01-10 11:11:04 -0800796 usb_serial_deregister(&sierra_device);
Greg Kroah-Hartman964ee1d2006-10-17 10:17:58 -0700797}
798
799module_init(sierra_init);
800module_exit(sierra_exit);
801
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700802MODULE_AUTHOR(DRIVER_AUTHOR);
803MODULE_DESCRIPTION(DRIVER_DESC);
804MODULE_VERSION(DRIVER_VERSION);
Kevin Lloyd69de51f2006-06-30 11:17:55 -0700805MODULE_LICENSE("GPL");
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700806
Kevin Lloyd228426e2008-01-10 11:11:04 -0800807module_param(truinstall, bool, 0);
808MODULE_PARM_DESC(truinstall, "TRU-Install support");
809
810module_param(nmea, bool, 0);
811MODULE_PARM_DESC(nmea, "NMEA streaming");
812
Kevin Lloyd033a3fb2006-10-13 23:53:21 -0700813#ifdef CONFIG_USB_DEBUG
814module_param(debug, bool, S_IRUGO | S_IWUSR);
815MODULE_PARM_DESC(debug, "Debug messages");
816#endif
817