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* Line6 Linux USB driver - 0.8.0
*
* Copyright (C) 2004-2009 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 "driver.h"
#include "audio.h"
#include "control.h"
#include "variax.h"
#define VARIAX_SYSEX_CODE 7
#define VARIAX_SYSEX_PARAM 0x3b
#define VARIAX_SYSEX_ACTIVATE 0x2a
#define VARIAX_MODEL_HEADER_LENGTH 7
#define VARIAX_MODEL_MESSAGE_LENGTH 199
#define VARIAX_OFFSET_ACTIVATE 7
static const char variax_activate[] = {
0xf0, 0x00, 0x01, 0x0c, 0x07, 0x00, 0x2a, 0x01,
0xf7
};
static const char variax_request_bank[] = {
0xf0, 0x00, 0x01, 0x0c, 0x07, 0x00, 0x6d, 0xf7
};
static const char variax_request_model1[] = {
0xf0, 0x00, 0x01, 0x0c, 0x07, 0x00, 0x3c, 0x00,
0x02, 0x00, 0x00, 0x00, 0x00, 0x03, 0x05, 0x03,
0x00, 0x00, 0x00, 0xf7
};
static const char variax_request_model2[] = {
0xf0, 0x00, 0x01, 0x0c, 0x07, 0x00, 0x3c, 0x00,
0x02, 0x00, 0x00, 0x00, 0x00, 0x03, 0x07, 0x03,
0x00, 0x00, 0x00, 0xf7
};
/*
Decode data transmitted by workbench.
*/
static void variax_decode(const unsigned char *raw_data, unsigned char *data,
int raw_size)
{
for (; raw_size > 0; raw_size -= 6) {
data[2] = raw_data[0] | (raw_data[1] << 4);
data[1] = raw_data[2] | (raw_data[3] << 4);
data[0] = raw_data[4] | (raw_data[5] << 4);
raw_data += 6;
data += 3;
}
}
static void variax_activate_timeout(unsigned long arg)
{
struct usb_line6_variax *variax = (struct usb_line6_variax *)arg;
variax->buffer_activate[VARIAX_OFFSET_ACTIVATE] = 1;
line6_send_raw_message_async(&variax->line6, variax->buffer_activate,
sizeof(variax_activate));
}
/*
Send an asynchronous activation request after a given interval.
*/
static void variax_activate_delayed(struct usb_line6_variax *variax,
int seconds)
{
variax->activate_timer.expires = jiffies + seconds * HZ;
variax->activate_timer.function = variax_activate_timeout;
variax->activate_timer.data = (unsigned long)variax;
add_timer(&variax->activate_timer);
}
static void variax_startup_timeout(unsigned long arg)
{
struct usb_line6_variax *variax = (struct usb_line6_variax *)arg;
if (variax->dumpreq.ok)
return;
line6_dump_request_async(&variax->dumpreq, &variax->line6, 0);
line6_startup_delayed(&variax->dumpreq, 1, variax_startup_timeout,
variax);
}
/*
Process a completely received message.
*/
void variax_process_message(struct usb_line6_variax *variax)
{
const unsigned char *buf = variax->line6.buffer_message;
switch (buf[0]) {
case LINE6_PARAM_CHANGE | LINE6_CHANNEL_HOST:
switch (buf[1]) {
case VARIAXMIDI_volume:
variax->volume = buf[2];
break;
case VARIAXMIDI_tone:
variax->tone = buf[2];
}
break;
case LINE6_PROGRAM_CHANGE | LINE6_CHANNEL_DEVICE:
case LINE6_PROGRAM_CHANGE | LINE6_CHANNEL_HOST:
variax->model = buf[1];
line6_dump_request_async(&variax->dumpreq, &variax->line6, 0);
break;
case LINE6_RESET:
dev_info(variax->line6.ifcdev, "VARIAX reset\n");
variax_activate_delayed(variax, VARIAX_ACTIVATE_DELAY);
break;
case LINE6_SYSEX_BEGIN:
if (memcmp(buf + 1, variax_request_model1 + 1,
VARIAX_MODEL_HEADER_LENGTH - 1) == 0) {
if (variax->line6.message_length ==
VARIAX_MODEL_MESSAGE_LENGTH) {
switch (variax->dumpreq.in_progress) {
case VARIAX_DUMP_PASS1:
variax_decode(buf + VARIAX_MODEL_HEADER_LENGTH, (unsigned char *)&variax->model_data,
(sizeof(variax->model_data.name) + sizeof(variax->model_data.control) / 2) * 2);
line6_dump_request_async(&variax->dumpreq, &variax->line6, 1);
line6_dump_started(&variax->dumpreq, VARIAX_DUMP_PASS2);
break;
case VARIAX_DUMP_PASS2:
/* model name is transmitted twice, so skip it here: */
variax_decode(buf + VARIAX_MODEL_HEADER_LENGTH,
(unsigned char *)&variax->model_data.control + sizeof(variax->model_data.control) / 2,
sizeof(variax->model_data.control) / 2 * 2);
variax->dumpreq.ok = 1;
line6_dump_request_async(&variax->dumpreq, &variax->line6, 2);
line6_dump_started(&variax->dumpreq, VARIAX_DUMP_PASS3);
}
} else {
DEBUG_MESSAGES(dev_err(variax->line6.ifcdev, "illegal length %d of model data\n", variax->line6.message_length));
line6_dump_finished(&variax->dumpreq);
}
} else if (memcmp(buf + 1, variax_request_bank + 1,
sizeof(variax_request_bank) - 2) == 0) {
memcpy(variax->bank,
buf + sizeof(variax_request_bank) - 1,
sizeof(variax->bank));
variax->dumpreq.ok = 1;
line6_dump_finished(&variax->dumpreq);
}
break;
case LINE6_SYSEX_END:
break;
default:
DEBUG_MESSAGES(dev_err(variax->line6.ifcdev, "Variax: unknown message %02X\n", buf[0]));
}
}
/*
"read" request on "volume" special file.
*/
static ssize_t variax_get_volume(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
return sprintf(buf, "%d\n", variax->volume);
}
/*
"write" request on "volume" special file.
*/
static ssize_t variax_set_volume(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
int value = simple_strtoul(buf, NULL, 10);
if (line6_transmit_parameter(&variax->line6, VARIAXMIDI_volume,
value) == 0)
variax->volume = value;
return count;
}
/*
"read" request on "model" special file.
*/
static ssize_t variax_get_model(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
return sprintf(buf, "%d\n", variax->model);
}
/*
"write" request on "model" special file.
*/
static ssize_t variax_set_model(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
int value = simple_strtoul(buf, NULL, 10);
if (line6_send_program(&variax->line6, value) == 0)
variax->model = value;
return count;
}
/*
"read" request on "active" special file.
*/
static ssize_t variax_get_active(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
return sprintf(buf, "%d\n", variax->buffer_activate[VARIAX_OFFSET_ACTIVATE]);
}
/*
"write" request on "active" special file.
*/
static ssize_t variax_set_active(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
int value = simple_strtoul(buf, NULL, 10) ? 1 : 0;
variax->buffer_activate[VARIAX_OFFSET_ACTIVATE] = value;
line6_send_raw_message_async(&variax->line6, variax->buffer_activate,
sizeof(variax_activate));
return count;
}
/*
"read" request on "tone" special file.
*/
static ssize_t variax_get_tone(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
return sprintf(buf, "%d\n", variax->tone);
}
/*
"write" request on "tone" special file.
*/
static ssize_t variax_set_tone(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
int value = simple_strtoul(buf, NULL, 10);
if (line6_transmit_parameter(&variax->line6, VARIAXMIDI_tone,
value) == 0)
variax->tone = value;
return count;
}
static ssize_t get_string(char *buf, const char *data, int length)
{
int i;
memcpy(buf, data, length);
for (i = length; i--;) {
char c = buf[i];
if ((c != 0) && (c != ' '))
break;
}
buf[i + 1] = '\n';
return i + 2;
}
/*
"read" request on "name" special file.
*/
static ssize_t variax_get_name(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
line6_wait_dump(&variax->dumpreq, 0);
return get_string(buf, variax->model_data.name,
sizeof(variax->model_data.name));
}
/*
"read" request on "bank" special file.
*/
static ssize_t variax_get_bank(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
line6_wait_dump(&variax->dumpreq, 0);
return get_string(buf, variax->bank, sizeof(variax->bank));
}
/*
"read" request on "dump" special file.
*/
static ssize_t variax_get_dump(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
int retval;
retval = line6_wait_dump(&variax->dumpreq, 0);
if (retval < 0)
return retval;
memcpy(buf, &variax->model_data.control,
sizeof(variax->model_data.control));
return sizeof(variax->model_data.control);
}
#if CREATE_RAW_FILE
/*
"write" request on "raw" special file.
*/
static ssize_t variax_set_raw2(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct usb_line6_variax *variax = usb_get_intfdata(to_usb_interface(dev));
int size;
int i;
char *sysex;
count -= count % 3;
size = count * 2;
sysex = variax_alloc_sysex_buffer(variax, VARIAX_SYSEX_PARAM, size);
if (!sysex)
return 0;
for (i = 0; i < count; i += 3) {
const unsigned char *p1 = buf + i;
char *p2 = sysex + SYSEX_DATA_OFS + i * 2;
p2[0] = p1[2] & 0x0f;
p2[1] = p1[2] >> 4;
p2[2] = p1[1] & 0x0f;
p2[3] = p1[1] >> 4;
p2[4] = p1[0] & 0x0f;
p2[5] = p1[0] >> 4;
}
line6_send_sysex_message(&variax->line6, sysex, size);
kfree(sysex);
return count;
}
#endif
/* Variax workbench special files: */
static DEVICE_ATTR(model, S_IWUSR | S_IRUGO, variax_get_model, variax_set_model);
static DEVICE_ATTR(volume, S_IWUSR | S_IRUGO, variax_get_volume, variax_set_volume);
static DEVICE_ATTR(tone, S_IWUSR | S_IRUGO, variax_get_tone, variax_set_tone);
static DEVICE_ATTR(name, S_IRUGO, variax_get_name, line6_nop_write);
static DEVICE_ATTR(bank, S_IRUGO, variax_get_bank, line6_nop_write);
static DEVICE_ATTR(dump, S_IRUGO, variax_get_dump, line6_nop_write);
static DEVICE_ATTR(active, S_IWUSR | S_IRUGO, variax_get_active, variax_set_active);
#if CREATE_RAW_FILE
static DEVICE_ATTR(raw, S_IWUSR, line6_nop_read, line6_set_raw);
static DEVICE_ATTR(raw2, S_IWUSR, line6_nop_read, variax_set_raw2);
#endif
/*
Variax destructor.
*/
static void variax_destruct(struct usb_interface *interface)
{
struct usb_line6_variax *variax = usb_get_intfdata(interface);
struct usb_line6 *line6;
if (variax == NULL)
return;
line6 = &variax->line6;
if (line6 == NULL)
return;
line6_cleanup_audio(line6);
/* free dump request data: */
line6_dumpreq_destructbuf(&variax->dumpreq, 2);
line6_dumpreq_destructbuf(&variax->dumpreq, 1);
line6_dumpreq_destruct(&variax->dumpreq);
kfree(variax->buffer_activate);
del_timer_sync(&variax->activate_timer);
}
/*
Create sysfs entries.
*/
static int variax_create_files2(struct device *dev)
{
int err;
CHECK_RETURN(device_create_file(dev, &dev_attr_model));
CHECK_RETURN(device_create_file(dev, &dev_attr_volume));
CHECK_RETURN(device_create_file(dev, &dev_attr_tone));
CHECK_RETURN(device_create_file(dev, &dev_attr_name));
CHECK_RETURN(device_create_file(dev, &dev_attr_bank));
CHECK_RETURN(device_create_file(dev, &dev_attr_dump));
CHECK_RETURN(device_create_file(dev, &dev_attr_active));
#if CREATE_RAW_FILE
CHECK_RETURN(device_create_file(dev, &dev_attr_raw));
CHECK_RETURN(device_create_file(dev, &dev_attr_raw2));
#endif
return 0;
}
/*
Init workbench device.
*/
int variax_init(struct usb_interface *interface,
struct usb_line6_variax *variax)
{
int err;
if ((interface == NULL) || (variax == NULL))
return -ENODEV;
/* initialize USB buffers: */
err = line6_dumpreq_init(&variax->dumpreq, variax_request_model1,
sizeof(variax_request_model1));
if (err < 0) {
dev_err(&interface->dev, "Out of memory\n");
variax_destruct(interface);
return err;
}
err = line6_dumpreq_initbuf(&variax->dumpreq, variax_request_model2,
sizeof(variax_request_model2), 1);
if (err < 0) {
dev_err(&interface->dev, "Out of memory\n");
variax_destruct(interface);
return err;
}
err = line6_dumpreq_initbuf(&variax->dumpreq, variax_request_bank,
sizeof(variax_request_bank), 2);
if (err < 0) {
dev_err(&interface->dev, "Out of memory\n");
variax_destruct(interface);
return err;
}
variax->buffer_activate = kmalloc(sizeof(variax_activate), GFP_KERNEL);
if (variax->buffer_activate == NULL) {
dev_err(&interface->dev, "Out of memory\n");
variax_destruct(interface);
return -ENOMEM;
}
memcpy(variax->buffer_activate, variax_activate,
sizeof(variax_activate));
init_timer(&variax->activate_timer);
/* create sysfs entries: */
err = variax_create_files(0, 0, &interface->dev);
if (err < 0) {
variax_destruct(interface);
return err;
}
err = variax_create_files2(&interface->dev);
if (err < 0) {
variax_destruct(interface);
return err;
}
/* initialize audio system: */
err = line6_init_audio(&variax->line6);
if (err < 0) {
variax_destruct(interface);
return err;
}
/* initialize MIDI subsystem: */
err = line6_init_midi(&variax->line6);
if (err < 0) {
variax_destruct(interface);
return err;
}
/* register audio system: */
err = line6_register_audio(&variax->line6);
if (err < 0) {
variax_destruct(interface);
return err;
}
variax_activate_delayed(variax, VARIAX_ACTIVATE_DELAY);
line6_startup_delayed(&variax->dumpreq, VARIAX_STARTUP_DELAY,
variax_startup_timeout, variax);
return 0;
}
/*
Workbench device disconnected.
*/
void variax_disconnect(struct usb_interface *interface)
{
struct device *dev;
if (interface == NULL)
return;
dev = &interface->dev;
if (dev != NULL) {
/* remove sysfs entries: */
variax_remove_files(0, 0, dev);
device_remove_file(dev, &dev_attr_model);
device_remove_file(dev, &dev_attr_volume);
device_remove_file(dev, &dev_attr_tone);
device_remove_file(dev, &dev_attr_name);
device_remove_file(dev, &dev_attr_bank);
device_remove_file(dev, &dev_attr_dump);
device_remove_file(dev, &dev_attr_active);
#if CREATE_RAW_FILE
device_remove_file(dev, &dev_attr_raw);
device_remove_file(dev, &dev_attr_raw2);
#endif
}
variax_destruct(interface);
}
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