2 * Line6 Linux USB driver - 0.9.1beta
4 * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation, version 2.
12 #include <linux/slab.h>
18 #define VARIAX_OFFSET_ACTIVATE 7
21 This message is sent by the device during initialization and identifies
22 the connected guitar version.
24 static const char variax_init_version[] = {
25 0xf0, 0x7e, 0x7f, 0x06, 0x02, 0x00, 0x01, 0x0c,
26 0x07, 0x00, 0x00, 0x00
30 This message is the last one sent by the device during initialization.
32 static const char variax_init_done[] = {
33 0xf0, 0x00, 0x01, 0x0c, 0x07, 0x00, 0x6b
36 static const char variax_activate[] = {
37 0xf0, 0x00, 0x01, 0x0c, 0x07, 0x00, 0x2a, 0x01,
41 /* forward declarations: */
42 static void variax_startup2(unsigned long data);
43 static void variax_startup4(unsigned long data);
44 static void variax_startup5(unsigned long data);
46 static void variax_activate_async(struct usb_line6_variax *variax, int a)
48 variax->buffer_activate[VARIAX_OFFSET_ACTIVATE] = a;
49 line6_send_raw_message_async(&variax->line6, variax->buffer_activate,
50 sizeof(variax_activate));
54 Variax startup procedure.
55 This is a sequence of functions with special requirements (e.g., must
56 not run immediately after initialization, must not run in interrupt
57 context). After the last one has finished, the device is ready to use.
60 static void variax_startup1(struct usb_line6_variax *variax)
62 CHECK_STARTUP_PROGRESS(variax->startup_progress, VARIAX_STARTUP_INIT);
64 /* delay startup procedure: */
65 line6_start_timer(&variax->startup_timer1, VARIAX_STARTUP_DELAY1,
66 variax_startup2, (unsigned long)variax);
69 static void variax_startup2(unsigned long data)
71 struct usb_line6_variax *variax = (struct usb_line6_variax *)data;
72 struct usb_line6 *line6 = &variax->line6;
74 /* schedule another startup procedure until startup is complete: */
75 if (variax->startup_progress >= VARIAX_STARTUP_LAST)
78 variax->startup_progress = VARIAX_STARTUP_VERSIONREQ;
79 line6_start_timer(&variax->startup_timer1, VARIAX_STARTUP_DELAY1,
80 variax_startup2, (unsigned long)variax);
82 /* request firmware version: */
83 line6_version_request_async(line6);
86 static void variax_startup3(struct usb_line6_variax *variax)
88 CHECK_STARTUP_PROGRESS(variax->startup_progress, VARIAX_STARTUP_WAIT);
90 /* delay startup procedure: */
91 line6_start_timer(&variax->startup_timer2, VARIAX_STARTUP_DELAY3,
92 variax_startup4, (unsigned long)variax);
95 static void variax_startup4(unsigned long data)
97 struct usb_line6_variax *variax = (struct usb_line6_variax *)data;
99 CHECK_STARTUP_PROGRESS(variax->startup_progress,
100 VARIAX_STARTUP_ACTIVATE);
102 /* activate device: */
103 variax_activate_async(variax, 1);
104 line6_start_timer(&variax->startup_timer2, VARIAX_STARTUP_DELAY4,
105 variax_startup5, (unsigned long)variax);
108 static void variax_startup5(unsigned long data)
110 struct usb_line6_variax *variax = (struct usb_line6_variax *)data;
112 CHECK_STARTUP_PROGRESS(variax->startup_progress,
113 VARIAX_STARTUP_WORKQUEUE);
115 /* schedule work for global work queue: */
116 schedule_work(&variax->startup_work);
119 static void variax_startup6(struct work_struct *work)
121 struct usb_line6_variax *variax =
122 container_of(work, struct usb_line6_variax, startup_work);
124 CHECK_STARTUP_PROGRESS(variax->startup_progress, VARIAX_STARTUP_SETUP);
126 /* ALSA audio interface: */
127 line6_register_audio(&variax->line6);
131 Process a completely received message.
133 void line6_variax_process_message(struct usb_line6_variax *variax)
135 const unsigned char *buf = variax->line6.buffer_message;
139 dev_info(variax->line6.ifcdev, "VARIAX reset\n");
142 case LINE6_SYSEX_BEGIN:
143 if (memcmp(buf + 1, variax_init_version + 1,
144 sizeof(variax_init_version) - 1) == 0) {
145 variax_startup3(variax);
146 } else if (memcmp(buf + 1, variax_init_done + 1,
147 sizeof(variax_init_done) - 1) == 0) {
148 /* notify of complete initialization: */
149 variax_startup4((unsigned long)variax);
158 static void variax_destruct(struct usb_interface *interface)
160 struct usb_line6_variax *variax = usb_get_intfdata(interface);
164 line6_cleanup_audio(&variax->line6);
166 del_timer(&variax->startup_timer1);
167 del_timer(&variax->startup_timer2);
168 cancel_work_sync(&variax->startup_work);
170 kfree(variax->buffer_activate);
174 Try to init workbench device.
176 static int variax_try_init(struct usb_interface *interface,
177 struct usb_line6_variax *variax)
181 init_timer(&variax->startup_timer1);
182 init_timer(&variax->startup_timer2);
183 INIT_WORK(&variax->startup_work, variax_startup6);
185 if ((interface == NULL) || (variax == NULL))
188 /* initialize USB buffers: */
189 variax->buffer_activate = kmemdup(variax_activate,
190 sizeof(variax_activate), GFP_KERNEL);
192 if (variax->buffer_activate == NULL) {
193 dev_err(&interface->dev, "Out of memory\n");
197 /* initialize audio system: */
198 err = line6_init_audio(&variax->line6);
202 /* initialize MIDI subsystem: */
203 err = line6_init_midi(&variax->line6);
207 /* initiate startup procedure: */
208 variax_startup1(variax);
213 Init workbench device (and clean up in case of failure).
215 int line6_variax_init(struct usb_interface *interface,
216 struct usb_line6_variax *variax)
218 int err = variax_try_init(interface, variax);
221 variax_destruct(interface);
227 Workbench device disconnected.
229 void line6_variax_disconnect(struct usb_interface *interface)
231 if (interface == NULL)
234 variax_destruct(interface);