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2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 
 kernel/sound/usb/line6/variax.c
....@@ -1,12 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Line 6 Linux USB driver
34  *
45  * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at)
5
- *
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.
9
- *
106  */
117 
128 #include <linux/slab.h>
....@@ -26,13 +22,9 @@
2622 	Stages of Variax startup procedure
2723 */
2824 enum {
29
-	VARIAX_STARTUP_INIT = 1,
3025 	VARIAX_STARTUP_VERSIONREQ,
31
-	VARIAX_STARTUP_WAIT,
3226 	VARIAX_STARTUP_ACTIVATE,
33
-	VARIAX_STARTUP_WORKQUEUE,
3427 	VARIAX_STARTUP_SETUP,
35
-	VARIAX_STARTUP_LAST = VARIAX_STARTUP_SETUP - 1
3628 };
3729 
3830 enum {
....@@ -47,16 +39,11 @@
4739 	/* Buffer for activation code */
4840 	unsigned char *buffer_activate;
4941 
50
-	/* Handler for device initialization */
51
-	struct work_struct startup_work;
52
-
53
-	/* Timers for device initialization */
54
-	struct timer_list startup_timer1;
55
-	struct timer_list startup_timer2;
56
-
5742 	/* Current progress in startup procedure */
5843 	int startup_progress;
5944 };
45
+
46
+#define line6_to_variax(x)	container_of(x, struct usb_line6_variax, line6)
6047 
6148 #define VARIAX_OFFSET_ACTIVATE 7
6249 
....@@ -81,11 +68,6 @@
8168 	0xf7
8269 };
8370 
84
-/* forward declarations: */
85
-static void variax_startup2(struct timer_list *t);
86
-static void variax_startup4(struct timer_list *t);
87
-static void variax_startup5(struct timer_list *t);
88
-
8971 static void variax_activate_async(struct usb_line6_variax *variax, int a)
9072 {
9173 	variax->buffer_activate[VARIAX_OFFSET_ACTIVATE] = a;
....@@ -100,74 +82,30 @@
10082 	context). After the last one has finished, the device is ready to use.
10183 */
10284 
103
-static void variax_startup1(struct usb_line6_variax *variax)
85
+static void variax_startup(struct usb_line6 *line6)
10486 {
105
-	CHECK_STARTUP_PROGRESS(variax->startup_progress, VARIAX_STARTUP_INIT);
87
+	struct usb_line6_variax *variax = line6_to_variax(line6);
10688 
107
-	/* delay startup procedure: */
108
-	line6_start_timer(&variax->startup_timer1, VARIAX_STARTUP_DELAY1,
109
-			  variax_startup2);
110
-}
111
-
112
-static void variax_startup2(struct timer_list *t)
113
-{
114
-	struct usb_line6_variax *variax = from_timer(variax, t, startup_timer1);
115
-	struct usb_line6 *line6 = &variax->line6;
116
-
117
-	/* schedule another startup procedure until startup is complete: */
118
-	if (variax->startup_progress >= VARIAX_STARTUP_LAST)
119
-		return;
120
-
121
-	variax->startup_progress = VARIAX_STARTUP_VERSIONREQ;
122
-	line6_start_timer(&variax->startup_timer1, VARIAX_STARTUP_DELAY1,
123
-			  variax_startup2);
124
-
125
-	/* request firmware version: */
126
-	line6_version_request_async(line6);
127
-}
128
-
129
-static void variax_startup3(struct usb_line6_variax *variax)
130
-{
131
-	CHECK_STARTUP_PROGRESS(variax->startup_progress, VARIAX_STARTUP_WAIT);
132
-
133
-	/* delay startup procedure: */
134
-	line6_start_timer(&variax->startup_timer2, VARIAX_STARTUP_DELAY3,
135
-			  variax_startup4);
136
-}
137
-
138
-static void variax_startup4(struct timer_list *t)
139
-{
140
-	struct usb_line6_variax *variax = from_timer(variax, t, startup_timer2);
141
-
142
-	CHECK_STARTUP_PROGRESS(variax->startup_progress,
143
-			       VARIAX_STARTUP_ACTIVATE);
144
-
145
-	/* activate device: */
146
-	variax_activate_async(variax, 1);
147
-	line6_start_timer(&variax->startup_timer2, VARIAX_STARTUP_DELAY4,
148
-			  variax_startup5);
149
-}
150
-
151
-static void variax_startup5(struct timer_list *t)
152
-{
153
-	struct usb_line6_variax *variax = from_timer(variax, t, startup_timer2);
154
-
155
-	CHECK_STARTUP_PROGRESS(variax->startup_progress,
156
-			       VARIAX_STARTUP_WORKQUEUE);
157
-
158
-	/* schedule work for global work queue: */
159
-	schedule_work(&variax->startup_work);
160
-}
161
-
162
-static void variax_startup6(struct work_struct *work)
163
-{
164
-	struct usb_line6_variax *variax =
165
-	    container_of(work, struct usb_line6_variax, startup_work);
166
-
167
-	CHECK_STARTUP_PROGRESS(variax->startup_progress, VARIAX_STARTUP_SETUP);
168
-
169
-	/* ALSA audio interface: */
170
-	snd_card_register(variax->line6.card);
89
+	switch (variax->startup_progress) {
90
+	case VARIAX_STARTUP_VERSIONREQ:
91
+		/* repeat request until getting the response */
92
+		schedule_delayed_work(&line6->startup_work,
93
+				      msecs_to_jiffies(VARIAX_STARTUP_DELAY1));
94
+		/* request firmware version: */
95
+		line6_version_request_async(line6);
96
+		break;
97
+	case VARIAX_STARTUP_ACTIVATE:
98
+		/* activate device: */
99
+		variax_activate_async(variax, 1);
100
+		variax->startup_progress = VARIAX_STARTUP_SETUP;
101
+		schedule_delayed_work(&line6->startup_work,
102
+				      msecs_to_jiffies(VARIAX_STARTUP_DELAY4));
103
+		break;
104
+	case VARIAX_STARTUP_SETUP:
105
+		/* ALSA audio interface: */
106
+		snd_card_register(variax->line6.card);
107
+		break;
108
+	}
171109 }
172110 
173111 /*
....@@ -175,7 +113,7 @@
175113 */
176114 static void line6_variax_process_message(struct usb_line6 *line6)
177115 {
178
-	struct usb_line6_variax *variax = (struct usb_line6_variax *) line6;
116
+	struct usb_line6_variax *variax = line6_to_variax(line6);
179117 	const unsigned char *buf = variax->line6.buffer_message;
180118 
181119 	switch (buf[0]) {
....@@ -186,11 +124,19 @@
186124 	case LINE6_SYSEX_BEGIN:
187125 		if (memcmp(buf + 1, variax_init_version + 1,
188126 			   sizeof(variax_init_version) - 1) == 0) {
189
-			variax_startup3(variax);
127
+			if (variax->startup_progress >= VARIAX_STARTUP_ACTIVATE)
128
+				break;
129
+			variax->startup_progress = VARIAX_STARTUP_ACTIVATE;
130
+			cancel_delayed_work(&line6->startup_work);
131
+			schedule_delayed_work(&line6->startup_work,
132
+					      msecs_to_jiffies(VARIAX_STARTUP_DELAY3));
190133 		} else if (memcmp(buf + 1, variax_init_done + 1,
191134 				  sizeof(variax_init_done) - 1) == 0) {
192135 			/* notify of complete initialization: */
193
-			variax_startup4(&variax->startup_timer2);
136
+			if (variax->startup_progress >= VARIAX_STARTUP_SETUP)
137
+				break;
138
+			cancel_delayed_work(&line6->startup_work);
139
+			schedule_delayed_work(&line6->startup_work, 0);
194140 		}
195141 		break;
196142 	}
....@@ -201,11 +147,7 @@
201147 */
202148 static void line6_variax_disconnect(struct usb_line6 *line6)
203149 {
204
-	struct usb_line6_variax *variax = (struct usb_line6_variax *)line6;
205
-
206
-	del_timer(&variax->startup_timer1);
207
-	del_timer(&variax->startup_timer2);
208
-	cancel_work_sync(&variax->startup_work);
150
+	struct usb_line6_variax *variax = line6_to_variax(line6);
209151 
210152 	kfree(variax->buffer_activate);
211153 }
....@@ -216,14 +158,11 @@
216158 static int variax_init(struct usb_line6 *line6,
217159 		       const struct usb_device_id *id)
218160 {
219
-	struct usb_line6_variax *variax = (struct usb_line6_variax *) line6;
161
+	struct usb_line6_variax *variax = line6_to_variax(line6);
220162 
221163 	line6->process_message = line6_variax_process_message;
222164 	line6->disconnect = line6_variax_disconnect;
223
-
224
-	timer_setup(&variax->startup_timer1, NULL, 0);
225
-	timer_setup(&variax->startup_timer2, NULL, 0);
226
-	INIT_WORK(&variax->startup_work, variax_startup6);
165
+	line6->startup = variax_startup;
227166 
228167 	/* initialize USB buffers: */
229168 	variax->buffer_activate = kmemdup(variax_activate,
....@@ -233,7 +172,8 @@
233172 		return -ENOMEM;
234173 
235174 	/* initiate startup procedure: */
236
-	variax_startup1(variax);
175
+	schedule_delayed_work(&line6->startup_work,
176
+			      msecs_to_jiffies(VARIAX_STARTUP_DELAY1));
237177 	return 0;
238178 }
239179 
....@@ -298,5 +238,5 @@
298238 
299239 module_usb_driver(variax_driver);
300240 
301
-MODULE_DESCRIPTION("Vairax Workbench USB driver");
241
+MODULE_DESCRIPTION("Variax Workbench USB driver");
302242 MODULE_LICENSE("GPL");