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Diffstat (limited to 'sound/usb/line6/variax.c')
-rw-r--r--sound/usb/line6/variax.c239
1 files changed, 239 insertions, 0 deletions
diff --git a/sound/usb/line6/variax.c b/sound/usb/line6/variax.c
new file mode 100644
index 000000000000..b4a41b0ad0ea
--- /dev/null
+++ b/sound/usb/line6/variax.c
@@ -0,0 +1,239 @@
+/*
+ * Line6 Linux USB driver - 0.9.1beta
+ *
+ * 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 "audio.h"
+#include "driver.h"
+#include "variax.h"
+
+#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
+};
+
+/* forward declarations: */
+static void variax_startup2(unsigned long data);
+static void variax_startup4(unsigned long data);
+static void variax_startup5(unsigned long data);
+
+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_startup1(struct usb_line6_variax *variax)
+{
+ CHECK_STARTUP_PROGRESS(variax->startup_progress, VARIAX_STARTUP_INIT);
+
+ /* delay startup procedure: */
+ line6_start_timer(&variax->startup_timer1, VARIAX_STARTUP_DELAY1,
+ variax_startup2, (unsigned long)variax);
+}
+
+static void variax_startup2(unsigned long data)
+{
+ struct usb_line6_variax *variax = (struct usb_line6_variax *)data;
+ struct usb_line6 *line6 = &variax->line6;
+
+ /* schedule another startup procedure until startup is complete: */
+ if (variax->startup_progress >= VARIAX_STARTUP_LAST)
+ return;
+
+ variax->startup_progress = VARIAX_STARTUP_VERSIONREQ;
+ line6_start_timer(&variax->startup_timer1, VARIAX_STARTUP_DELAY1,
+ variax_startup2, (unsigned long)variax);
+
+ /* request firmware version: */
+ line6_version_request_async(line6);
+}
+
+static void variax_startup3(struct usb_line6_variax *variax)
+{
+ CHECK_STARTUP_PROGRESS(variax->startup_progress, VARIAX_STARTUP_WAIT);
+
+ /* delay startup procedure: */
+ line6_start_timer(&variax->startup_timer2, VARIAX_STARTUP_DELAY3,
+ variax_startup4, (unsigned long)variax);
+}
+
+static void variax_startup4(unsigned long data)
+{
+ struct usb_line6_variax *variax = (struct usb_line6_variax *)data;
+
+ CHECK_STARTUP_PROGRESS(variax->startup_progress,
+ VARIAX_STARTUP_ACTIVATE);
+
+ /* activate device: */
+ variax_activate_async(variax, 1);
+ line6_start_timer(&variax->startup_timer2, VARIAX_STARTUP_DELAY4,
+ variax_startup5, (unsigned long)variax);
+}
+
+static void variax_startup5(unsigned long data)
+{
+ struct usb_line6_variax *variax = (struct usb_line6_variax *)data;
+
+ CHECK_STARTUP_PROGRESS(variax->startup_progress,
+ VARIAX_STARTUP_WORKQUEUE);
+
+ /* schedule work for global work queue: */
+ schedule_work(&variax->startup_work);
+}
+
+static void variax_startup6(struct work_struct *work)
+{
+ struct usb_line6_variax *variax =
+ container_of(work, struct usb_line6_variax, startup_work);
+
+ CHECK_STARTUP_PROGRESS(variax->startup_progress, VARIAX_STARTUP_SETUP);
+
+ /* ALSA audio interface: */
+ line6_register_audio(&variax->line6);
+}
+
+/*
+ Process a completely received message.
+*/
+static void line6_variax_process_message(struct usb_line6 *line6)
+{
+ struct usb_line6_variax *variax = (struct usb_line6_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) {
+ variax_startup3(variax);
+ } else if (memcmp(buf + 1, variax_init_done + 1,
+ sizeof(variax_init_done) - 1) == 0) {
+ /* notify of complete initialization: */
+ variax_startup4((unsigned long)variax);
+ }
+ break;
+ }
+}
+
+/*
+ Variax destructor.
+*/
+static void variax_destruct(struct usb_interface *interface)
+{
+ struct usb_line6_variax *variax = usb_get_intfdata(interface);
+
+ if (variax == NULL)
+ return;
+ line6_cleanup_audio(&variax->line6);
+
+ del_timer(&variax->startup_timer1);
+ del_timer(&variax->startup_timer2);
+ cancel_work_sync(&variax->startup_work);
+
+ kfree(variax->buffer_activate);
+}
+
+/*
+ Workbench device disconnected.
+*/
+static void line6_variax_disconnect(struct usb_interface *interface)
+{
+ if (interface == NULL)
+ return;
+
+ variax_destruct(interface);
+}
+
+/*
+ Try to init workbench device.
+*/
+static int variax_try_init(struct usb_interface *interface,
+ struct usb_line6 *line6)
+{
+ struct usb_line6_variax *variax = (struct usb_line6_variax *) line6;
+ int err;
+
+ line6->process_message = line6_variax_process_message;
+ line6->disconnect = line6_variax_disconnect;
+
+ init_timer(&variax->startup_timer1);
+ init_timer(&variax->startup_timer2);
+ INIT_WORK(&variax->startup_work, variax_startup6);
+
+ if ((interface == NULL) || (variax == NULL))
+ return -ENODEV;
+
+ /* initialize USB buffers: */
+ variax->buffer_activate = kmemdup(variax_activate,
+ sizeof(variax_activate), GFP_KERNEL);
+
+ if (variax->buffer_activate == NULL) {
+ dev_err(&interface->dev, "Out of memory\n");
+ return -ENOMEM;
+ }
+
+ /* initialize audio system: */
+ err = line6_init_audio(&variax->line6);
+ if (err < 0)
+ return err;
+
+ /* initialize MIDI subsystem: */
+ err = line6_init_midi(&variax->line6);
+ if (err < 0)
+ return err;
+
+ /* initiate startup procedure: */
+ variax_startup1(variax);
+ return 0;
+}
+
+/*
+ Init workbench device (and clean up in case of failure).
+*/
+int line6_variax_init(struct usb_interface *interface, struct usb_line6 *line6)
+{
+ int err = variax_try_init(interface, line6);
+
+ if (err < 0)
+ variax_destruct(interface);
+
+ return err;
+}