--- /dev/null
+/*
+ * 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_INIT = 1,
+ VARIAX_STARTUP_VERSIONREQ,
+ VARIAX_STARTUP_WAIT,
+ VARIAX_STARTUP_ACTIVATE,
+ VARIAX_STARTUP_WORKQUEUE,
+ VARIAX_STARTUP_SETUP,
+ VARIAX_STARTUP_LAST = VARIAX_STARTUP_SETUP - 1
+};
+
+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;
+
+ /* Handler for device initialization */
+ struct work_struct startup_work;
+
+ /* Timers for device initialization */
+ struct timer_list startup_timer1;
+ struct timer_list startup_timer2;
+
+ /* Current progress in startup procedure */
+ int startup_progress;
+};
+
+#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: */
+ snd_card_register(variax->line6.card);
+}
+
+/*
+ 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 line6_variax_disconnect(struct usb_line6 *line6)
+{
+ struct usb_line6_variax *variax = (struct usb_line6_variax *)line6;
+
+ del_timer(&variax->startup_timer1);
+ del_timer(&variax->startup_timer2);
+ cancel_work_sync(&variax->startup_work);
+
+ 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 = (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);
+
+ /* 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: */
+ variax_startup1(variax);
+ 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,
+ .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,
+ .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");
Code Review / kvmfornfv.git / blobdiff