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-rw-r--r--drivers/usb/serial/airprime.c261
1 files changed, 256 insertions, 5 deletions
diff --git a/drivers/usb/serial/airprime.c b/drivers/usb/serial/airprime.c
index 62082532a8b3..6e1a84a858d4 100644
--- a/drivers/usb/serial/airprime.c
+++ b/drivers/usb/serial/airprime.c
@@ -1,7 +1,7 @@
1/* 1/*
2 * AirPrime CDMA Wireless Serial USB driver 2 * AirPrime CDMA Wireless Serial USB driver
3 * 3 *
4 * Copyright (C) 2005 Greg Kroah-Hartman <gregkh@suse.de> 4 * Copyright (C) 2005-2006 Greg Kroah-Hartman <gregkh@suse.de>
5 * 5 *
6 * This program is free software; you can redistribute it and/or 6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version 7 * modify it under the terms of the GNU General Public License version
@@ -11,26 +11,264 @@
11#include <linux/kernel.h> 11#include <linux/kernel.h>
12#include <linux/init.h> 12#include <linux/init.h>
13#include <linux/tty.h> 13#include <linux/tty.h>
14#include <linux/tty_flip.h>
14#include <linux/module.h> 15#include <linux/module.h>
15#include <linux/usb.h> 16#include <linux/usb.h>
16#include <linux/usb/serial.h> 17#include <linux/usb/serial.h>
17 18
18static struct usb_device_id id_table [] = { 19static struct usb_device_id id_table [] = {
19 { USB_DEVICE(0x0c88, 0x17da) }, /* Kyocera Wireless KPC650/Passport */ 20 { USB_DEVICE(0x0c88, 0x17da) }, /* Kyocera Wireless KPC650/Passport */
20 { USB_DEVICE(0xf3d, 0x0112) }, /* AirPrime CDMA Wireless PC Card */ 21 { USB_DEVICE(0x0f3d, 0x0112) }, /* AirPrime CDMA Wireless PC Card */
21 { USB_DEVICE(0x1410, 0x1110) }, /* Novatel Wireless Merlin CDMA */ 22 { USB_DEVICE(0x1199, 0x0017) }, /* Sierra Wireless EM5625 */
23 { USB_DEVICE(0x1199, 0x0018) }, /* Sierra Wireless MC5720 */
22 { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless Aircard 580 */ 24 { USB_DEVICE(0x1199, 0x0112) }, /* Sierra Wireless Aircard 580 */
23 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */ 25 { USB_DEVICE(0x1199, 0x0218) }, /* Sierra Wireless MC5720 */
26 { USB_DEVICE(0x1410, 0x1110) }, /* Novatel Wireless Merlin CDMA */
24 { }, 27 { },
25}; 28};
26MODULE_DEVICE_TABLE(usb, id_table); 29MODULE_DEVICE_TABLE(usb, id_table);
27 30
31#define URB_TRANSFER_BUFFER_SIZE 4096
32#define NUM_READ_URBS 4
33#define NUM_WRITE_URBS 4
34#define NUM_BULK_EPS 3
35#define MAX_BULK_EPS 6
36
37/* if overridden by the user, then use their value for the size of the
38 * read and write urbs, and the number of endpoints */
39static int buffer_size = URB_TRANSFER_BUFFER_SIZE;
40static int endpoints = NUM_BULK_EPS;
41static int debug;
42struct airprime_private {
43 spinlock_t lock;
44 int outstanding_urbs;
45 int throttled;
46 struct urb *read_urbp[NUM_READ_URBS];
47};
48
49static void airprime_read_bulk_callback(struct urb *urb, struct pt_regs *regs)
50{
51 struct usb_serial_port *port = urb->context;
52 unsigned char *data = urb->transfer_buffer;
53 struct tty_struct *tty;
54 int result;
55
56 dbg("%s - port %d", __FUNCTION__, port->number);
57
58 if (urb->status) {
59 dbg("%s - nonzero read bulk status received: %d",
60 __FUNCTION__, urb->status);
61 /* something happened, so free up the memory for this urb */
62 if (urb->transfer_buffer) {
63 kfree (urb->transfer_buffer);
64 urb->transfer_buffer = NULL;
65 }
66 return;
67 }
68 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
69
70 tty = port->tty;
71 if (tty && urb->actual_length) {
72 tty_insert_flip_string (tty, data, urb->actual_length);
73 tty_flip_buffer_push (tty);
74 }
75
76 result = usb_submit_urb (urb, GFP_ATOMIC);
77 if (result)
78 dev_err(&port->dev, "%s - failed resubmitting read urb, error %d\n",
79 __FUNCTION__, result);
80 return;
81}
82
83static void airprime_write_bulk_callback(struct urb *urb, struct pt_regs *regs)
84{
85 struct usb_serial_port *port = urb->context;
86 struct airprime_private *priv = usb_get_serial_port_data(port);
87 unsigned long flags;
88
89 dbg("%s - port %d", __FUNCTION__, port->number);
90
91 /* free up the transfer buffer, as usb_free_urb() does not do this */
92 kfree (urb->transfer_buffer);
93
94 if (urb->status)
95 dbg("%s - nonzero write bulk status received: %d",
96 __FUNCTION__, urb->status);
97 spin_lock_irqsave(&priv->lock, flags);
98 --priv->outstanding_urbs;
99 spin_unlock_irqrestore(&priv->lock, flags);
100
101 usb_serial_port_softint(port);
102}
103
104static int airprime_open(struct usb_serial_port *port, struct file *filp)
105{
106 struct airprime_private *priv = usb_get_serial_port_data(port);
107 struct usb_serial *serial = port->serial;
108 struct urb *urb;
109 char *buffer = NULL;
110 int i;
111 int result = 0;
112
113 dbg("%s - port %d", __FUNCTION__, port->number);
114
115 /* initialize our private data structure if it isn't already created */
116 if (!priv) {
117 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
118 if (!priv) {
119 result = -ENOMEM;
120 goto out;
121 }
122 spin_lock_init(&priv->lock);
123 usb_set_serial_port_data(port, priv);
124 }
125
126 for (i = 0; i < NUM_READ_URBS; ++i) {
127 buffer = kmalloc(buffer_size, GFP_KERNEL);
128 if (!buffer) {
129 dev_err(&port->dev, "%s - out of memory.\n",
130 __FUNCTION__);
131 result = -ENOMEM;
132 goto errout;
133 }
134 urb = usb_alloc_urb(0, GFP_KERNEL);
135 if (!urb) {
136 dev_err(&port->dev, "%s - no more urbs?\n",
137 __FUNCTION__);
138 result = -ENOMEM;
139 goto errout;
140 }
141 usb_fill_bulk_urb(urb, serial->dev,
142 usb_rcvbulkpipe(serial->dev,
143 port->bulk_out_endpointAddress),
144 buffer, buffer_size,
145 airprime_read_bulk_callback, port);
146 result = usb_submit_urb(urb, GFP_KERNEL);
147 if (result) {
148 dev_err(&port->dev,
149 "%s - failed submitting read urb %d for port %d, error %d\n",
150 __FUNCTION__, i, port->number, result);
151 goto errout;
152 }
153 /* remember this urb so we can kill it when the port is closed */
154 priv->read_urbp[i] = urb;
155 }
156 goto out;
157
158 errout:
159 /* some error happened, cancel any submitted urbs and clean up anything that
160 got allocated successfully */
161
162 for ( ; i >= 0; --i) {
163 urb = priv->read_urbp[i];
164 if (urb) {
165 /* This urb was submitted successfully. So we have to
166 cancel it.
167 Unlinking the urb will invoke read_bulk_callback()
168 with an error status, so its transfer buffer will
169 be freed there */
170 if (usb_unlink_urb (urb) != -EINPROGRESS) {
171 /* comments in drivers/usb/core/urb.c say this
172 can only happen if the urb was never submitted,
173 or has completed already.
174 Either way we may have to free the transfer
175 buffer here. */
176 if (urb->transfer_buffer) {
177 kfree (urb->transfer_buffer);
178 urb->transfer_buffer = NULL;
179 }
180 }
181 usb_free_urb (urb);
182 }
183 }
184
185 out:
186 return result;
187}
188
189static void airprime_close(struct usb_serial_port *port, struct file * filp)
190{
191 struct airprime_private *priv = usb_get_serial_port_data(port);
192 int i;
193
194 dbg("%s - port %d", __FUNCTION__, port->number);
195
196 /* killing the urb will invoke read_bulk_callback() with an error status,
197 so the transfer buffer will be freed there */
198 for (i = 0; i < NUM_READ_URBS; ++i) {
199 usb_kill_urb (priv->read_urbp[i]);
200 usb_free_urb (priv->read_urbp[i]);
201 }
202
203 /* free up private structure */
204 kfree (priv);
205 usb_set_serial_port_data(port, NULL);
206}
207
208static int airprime_write(struct usb_serial_port *port,
209 const unsigned char *buf, int count)
210{
211 struct airprime_private *priv = usb_get_serial_port_data(port);
212 struct usb_serial *serial = port->serial;
213 struct urb *urb;
214 unsigned char *buffer;
215 unsigned long flags;
216 int status;
217 dbg("%s - port %d", __FUNCTION__, port->number);
218
219 spin_lock_irqsave(&priv->lock, flags);
220 if (priv->outstanding_urbs > NUM_WRITE_URBS) {
221 spin_unlock_irqrestore(&priv->lock, flags);
222 dbg("%s - write limit hit\n", __FUNCTION__);
223 return 0;
224 }
225 spin_unlock_irqrestore(&priv->lock, flags);
226 buffer = kmalloc(count, GFP_ATOMIC);
227 if (!buffer) {
228 dev_err(&port->dev, "out of memory\n");
229 return -ENOMEM;
230 }
231 urb = usb_alloc_urb(0, GFP_ATOMIC);
232 if (!urb) {
233 dev_err(&port->dev, "no more free urbs\n");
234 kfree (buffer);
235 return -ENOMEM;
236 }
237 memcpy (buffer, buf, count);
238
239 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, buffer);
240
241 usb_fill_bulk_urb(urb, serial->dev,
242 usb_sndbulkpipe(serial->dev,
243 port->bulk_out_endpointAddress),
244 buffer, count,
245 airprime_write_bulk_callback, port);
246
247 /* send it down the pipe */
248 status = usb_submit_urb(urb, GFP_ATOMIC);
249 if (status) {
250 dev_err(&port->dev,
251 "%s - usb_submit_urb(write bulk) failed with status = %d\n",
252 __FUNCTION__, status);
253 count = status;
254 kfree (buffer);
255 } else {
256 spin_lock_irqsave(&priv->lock, flags);
257 ++priv->outstanding_urbs;
258 spin_unlock_irqrestore(&priv->lock, flags);
259 }
260 /* we are done with this urb, so let the host driver
261 * really free it when it is finished with it */
262 usb_free_urb (urb);
263 return count;
264}
265
28static struct usb_driver airprime_driver = { 266static struct usb_driver airprime_driver = {
29 .name = "airprime", 267 .name = "airprime",
30 .probe = usb_serial_probe, 268 .probe = usb_serial_probe,
31 .disconnect = usb_serial_disconnect, 269 .disconnect = usb_serial_disconnect,
32 .id_table = id_table, 270 .id_table = id_table,
33 .no_dynamic_id = 1, 271 .no_dynamic_id = 1,
34}; 272};
35 273
36static struct usb_serial_driver airprime_device = { 274static struct usb_serial_driver airprime_device = {
@@ -42,13 +280,17 @@ static struct usb_serial_driver airprime_device = {
42 .num_interrupt_in = NUM_DONT_CARE, 280 .num_interrupt_in = NUM_DONT_CARE,
43 .num_bulk_in = NUM_DONT_CARE, 281 .num_bulk_in = NUM_DONT_CARE,
44 .num_bulk_out = NUM_DONT_CARE, 282 .num_bulk_out = NUM_DONT_CARE,
45 .num_ports = 1, 283 .open = airprime_open,
284 .close = airprime_close,
285 .write = airprime_write,
46}; 286};
47 287
48static int __init airprime_init(void) 288static int __init airprime_init(void)
49{ 289{
50 int retval; 290 int retval;
51 291
292 airprime_device.num_ports =
293 (endpoints > 0 && endpoints <= MAX_BULK_EPS) ? endpoints : NUM_BULK_EPS;
52 retval = usb_serial_register(&airprime_device); 294 retval = usb_serial_register(&airprime_device);
53 if (retval) 295 if (retval)
54 return retval; 296 return retval;
@@ -60,6 +302,8 @@ static int __init airprime_init(void)
60 302
61static void __exit airprime_exit(void) 303static void __exit airprime_exit(void)
62{ 304{
305 dbg("%s", __FUNCTION__);
306
63 usb_deregister(&airprime_driver); 307 usb_deregister(&airprime_driver);
64 usb_serial_deregister(&airprime_device); 308 usb_serial_deregister(&airprime_device);
65} 309}
@@ -67,3 +311,10 @@ static void __exit airprime_exit(void)
67module_init(airprime_init); 311module_init(airprime_init);
68module_exit(airprime_exit); 312module_exit(airprime_exit);
69MODULE_LICENSE("GPL"); 313MODULE_LICENSE("GPL");
314
315module_param(debug, bool, S_IRUGO | S_IWUSR);
316MODULE_PARM_DESC(debug, "Debug enabled");
317module_param(buffer_size, int, 0);
318MODULE_PARM_DESC(buffer_size, "Size of the transfer buffers in bytes (default 4096)");
319module_param(endpoints, int, 0);
320MODULE_PARM_DESC(endpoints, "Number of bulk EPs to configure (default 3)");