diff options
Diffstat (limited to 'sound/usb/line6/variax.c')
| -rw-r--r-- | sound/usb/line6/variax.c | 242 |
1 files changed, 242 insertions, 0 deletions
diff --git a/sound/usb/line6/variax.c b/sound/usb/line6/variax.c new file mode 100644 index 000000000..c2245aa93 --- /dev/null +++ b/sound/usb/line6/variax.c @@ -0,0 +1,242 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Line 6 Linux USB driver + * + * Copyright (C) 2004-2010 Markus Grabner (grabner@icg.tugraz.at) + */ + +#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"); |