1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
|
/*
* Line 6 Linux USB driver
*
* Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2.
*
*/
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/usb.h>
#include <linux/wait.h>
#include <linux/module.h>
#include <sound/core.h>
#include "driver.h"
#define VARIAX_STARTUP_DELAY1 1000
#define VARIAX_STARTUP_DELAY3 100
#define VARIAX_STARTUP_DELAY4 100
/*
Stages of Variax startup procedure
*/
enum {
VARIAX_STARTUP_VERSIONREQ,
VARIAX_STARTUP_ACTIVATE,
VARIAX_STARTUP_SETUP,
};
enum {
LINE6_PODXTLIVE_VARIAX,
LINE6_VARIAX
};
struct usb_line6_variax {
/* Generic Line 6 USB data */
struct usb_line6 line6;
/* Buffer for activation code */
unsigned char *buffer_activate;
/* Current progress in startup procedure */
int startup_progress;
};
#define line6_to_variax(x) container_of(x, struct usb_line6_variax, line6)
#define VARIAX_OFFSET_ACTIVATE 7
/*
This message is sent by the device during initialization and identifies
the connected guitar version.
*/
static const char variax_init_version[] = {
0xf0, 0x7e, 0x7f, 0x06, 0x02, 0x00, 0x01, 0x0c,
0x07, 0x00, 0x00, 0x00
};
/*
This message is the last one sent by the device during initialization.
*/
static const char variax_init_done[] = {
0xf0, 0x00, 0x01, 0x0c, 0x07, 0x00, 0x6b
};
static const char variax_activate[] = {
0xf0, 0x00, 0x01, 0x0c, 0x07, 0x00, 0x2a, 0x01,
0xf7
};
static void variax_activate_async(struct usb_line6_variax *variax, int a)
{
variax->buffer_activate[VARIAX_OFFSET_ACTIVATE] = a;
line6_send_raw_message_async(&variax->line6, variax->buffer_activate,
sizeof(variax_activate));
}
/*
Variax startup procedure.
This is a sequence of functions with special requirements (e.g., must
not run immediately after initialization, must not run in interrupt
context). After the last one has finished, the device is ready to use.
*/
static void variax_startup(struct usb_line6 *line6)
{
struct usb_line6_variax *variax = line6_to_variax(line6);
switch (variax->startup_progress) {
case VARIAX_STARTUP_VERSIONREQ:
/* repeat request until getting the response */
schedule_delayed_work(&line6->startup_work,
msecs_to_jiffies(VARIAX_STARTUP_DELAY1));
/* request firmware version: */
line6_version_request_async(line6);
break;
case VARIAX_STARTUP_ACTIVATE:
/* activate device: */
variax_activate_async(variax, 1);
variax->startup_progress = VARIAX_STARTUP_SETUP;
schedule_delayed_work(&line6->startup_work,
msecs_to_jiffies(VARIAX_STARTUP_DELAY4));
break;
case VARIAX_STARTUP_SETUP:
/* ALSA audio interface: */
snd_card_register(variax->line6.card);
break;
}
}
/*
Process a completely received message.
*/
static void line6_variax_process_message(struct usb_line6 *line6)
{
struct usb_line6_variax *variax = line6_to_variax(line6);
const unsigned char *buf = variax->line6.buffer_message;
switch (buf[0]) {
case LINE6_RESET:
dev_info(variax->line6.ifcdev, "VARIAX reset\n");
break;
case LINE6_SYSEX_BEGIN:
if (memcmp(buf + 1, variax_init_version + 1,
sizeof(variax_init_version) - 1) == 0) {
if (variax->startup_progress >= VARIAX_STARTUP_ACTIVATE)
break;
variax->startup_progress = VARIAX_STARTUP_ACTIVATE;
cancel_delayed_work(&line6->startup_work);
schedule_delayed_work(&line6->startup_work,
msecs_to_jiffies(VARIAX_STARTUP_DELAY3));
} else if (memcmp(buf + 1, variax_init_done + 1,
sizeof(variax_init_done) - 1) == 0) {
/* notify of complete initialization: */
if (variax->startup_progress >= VARIAX_STARTUP_SETUP)
break;
cancel_delayed_work(&line6->startup_work);
schedule_delayed_work(&line6->startup_work, 0);
}
break;
}
}
/*
Variax destructor.
*/
static void line6_variax_disconnect(struct usb_line6 *line6)
{
struct usb_line6_variax *variax = line6_to_variax(line6);
kfree(variax->buffer_activate);
}
/*
Try to init workbench device.
*/
static int variax_init(struct usb_line6 *line6,
const struct usb_device_id *id)
{
struct usb_line6_variax *variax = line6_to_variax(line6);
int err;
line6->process_message = line6_variax_process_message;
line6->disconnect = line6_variax_disconnect;
line6->startup = variax_startup;
/* initialize USB buffers: */
variax->buffer_activate = kmemdup(variax_activate,
sizeof(variax_activate), GFP_KERNEL);
if (variax->buffer_activate == NULL)
return -ENOMEM;
/* initialize MIDI subsystem: */
err = line6_init_midi(&variax->line6);
if (err < 0)
return err;
/* initiate startup procedure: */
schedule_delayed_work(&line6->startup_work,
msecs_to_jiffies(VARIAX_STARTUP_DELAY1));
return 0;
}
#define LINE6_DEVICE(prod) USB_DEVICE(0x0e41, prod)
#define LINE6_IF_NUM(prod, n) USB_DEVICE_INTERFACE_NUMBER(0x0e41, prod, n)
/* table of devices that work with this driver */
static const struct usb_device_id variax_id_table[] = {
{ LINE6_IF_NUM(0x4650, 1), .driver_info = LINE6_PODXTLIVE_VARIAX },
{ LINE6_DEVICE(0x534d), .driver_info = LINE6_VARIAX },
{}
};
MODULE_DEVICE_TABLE(usb, variax_id_table);
static const struct line6_properties variax_properties_table[] = {
[LINE6_PODXTLIVE_VARIAX] = {
.id = "PODxtLive",
.name = "PODxt Live",
.capabilities = LINE6_CAP_CONTROL
| LINE6_CAP_CONTROL_MIDI,
.altsetting = 1,
.ep_ctrl_r = 0x86,
.ep_ctrl_w = 0x05,
.ep_audio_r = 0x82,
.ep_audio_w = 0x01,
},
[LINE6_VARIAX] = {
.id = "Variax",
.name = "Variax Workbench",
.capabilities = LINE6_CAP_CONTROL
| LINE6_CAP_CONTROL_MIDI,
.altsetting = 1,
.ep_ctrl_r = 0x82,
.ep_ctrl_w = 0x01,
/* no audio channel */
}
};
/*
Probe USB device.
*/
static int variax_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
return line6_probe(interface, id, "Line6-Variax",
&variax_properties_table[id->driver_info],
variax_init, sizeof(struct usb_line6_variax));
}
static struct usb_driver variax_driver = {
.name = KBUILD_MODNAME,
.probe = variax_probe,
.disconnect = line6_disconnect,
#ifdef CONFIG_PM
.suspend = line6_suspend,
.resume = line6_resume,
.reset_resume = line6_resume,
#endif
.id_table = variax_id_table,
};
module_usb_driver(variax_driver);
MODULE_DESCRIPTION("Vairax Workbench USB driver");
MODULE_LICENSE("GPL");
|
