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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * Line 6 Linux USB driver
- *
- * Copyright (C) 2004-2010 Markus Grabner ([email protected])
- */
- #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);
- 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;
- /* 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("Variax Workbench USB driver");
- MODULE_LICENSE("GPL");
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