OpenCloudOS-Kernel/sound/usb/line6/driver.c

863 lines
20 KiB
C
Raw Normal View History

/*
* 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/kernel.h>
#include <linux/module.h>
#include <linux/export.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
#include <linux/slab.h>
#include <linux/usb.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/hwdep.h>
#include "capture.h"
#include "driver.h"
#include "midi.h"
#include "playback.h"
#define DRIVER_AUTHOR "Markus Grabner <grabner@icg.tugraz.at>"
#define DRIVER_DESC "Line 6 USB Driver"
/*
This is Line 6's MIDI manufacturer ID.
*/
const unsigned char line6_midi_id[3] = {
0x00, 0x01, 0x0c
};
EXPORT_SYMBOL_GPL(line6_midi_id);
/*
Code to request version of POD, Variax interface
(and maybe other devices).
*/
static const char line6_request_version[] = {
0xf0, 0x7e, 0x7f, 0x06, 0x01, 0xf7
};
/*
Class for asynchronous messages.
*/
struct message {
struct usb_line6 *line6;
const char *buffer;
int size;
int done;
};
/*
Forward declarations.
*/
static void line6_data_received(struct urb *urb);
static int line6_send_raw_message_async_part(struct message *msg,
struct urb *urb);
/*
Start to listen on endpoint.
*/
static int line6_start_listen(struct usb_line6 *line6)
{
int err;
if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
usb_fill_int_urb(line6->urb_listen, line6->usbdev,
usb_rcvintpipe(line6->usbdev, line6->properties->ep_ctrl_r),
line6->buffer_listen, LINE6_BUFSIZE_LISTEN,
line6_data_received, line6, line6->interval);
} else {
usb_fill_bulk_urb(line6->urb_listen, line6->usbdev,
usb_rcvbulkpipe(line6->usbdev, line6->properties->ep_ctrl_r),
line6->buffer_listen, LINE6_BUFSIZE_LISTEN,
line6_data_received, line6);
}
line6->urb_listen->actual_length = 0;
err = usb_submit_urb(line6->urb_listen, GFP_ATOMIC);
return err;
}
/*
Stop listening on endpoint.
*/
static void line6_stop_listen(struct usb_line6 *line6)
{
usb_kill_urb(line6->urb_listen);
}
/*
Send raw message in pieces of wMaxPacketSize bytes.
*/
static int line6_send_raw_message(struct usb_line6 *line6, const char *buffer,
int size)
{
int i, done = 0;
const struct line6_properties *properties = line6->properties;
for (i = 0; i < size; i += line6->max_packet_size) {
int partial;
const char *frag_buf = buffer + i;
int frag_size = min(line6->max_packet_size, size - i);
int retval;
if (properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
retval = usb_interrupt_msg(line6->usbdev,
usb_sndintpipe(line6->usbdev, properties->ep_ctrl_w),
(char *)frag_buf, frag_size,
&partial, LINE6_TIMEOUT * HZ);
} else {
retval = usb_bulk_msg(line6->usbdev,
usb_sndbulkpipe(line6->usbdev, properties->ep_ctrl_w),
(char *)frag_buf, frag_size,
&partial, LINE6_TIMEOUT * HZ);
}
if (retval) {
dev_err(line6->ifcdev,
"usb_bulk_msg failed (%d)\n", retval);
break;
}
done += frag_size;
}
return done;
}
/*
Notification of completion of asynchronous request transmission.
*/
static void line6_async_request_sent(struct urb *urb)
{
struct message *msg = (struct message *)urb->context;
if (msg->done >= msg->size) {
usb_free_urb(urb);
kfree(msg);
} else
line6_send_raw_message_async_part(msg, urb);
}
/*
Asynchronously send part of a raw message.
*/
static int line6_send_raw_message_async_part(struct message *msg,
struct urb *urb)
{
int retval;
struct usb_line6 *line6 = msg->line6;
int done = msg->done;
int bytes = min(msg->size - done, line6->max_packet_size);
if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
usb_fill_int_urb(urb, line6->usbdev,
usb_sndintpipe(line6->usbdev, line6->properties->ep_ctrl_w),
(char *)msg->buffer + done, bytes,
line6_async_request_sent, msg, line6->interval);
} else {
usb_fill_bulk_urb(urb, line6->usbdev,
usb_sndbulkpipe(line6->usbdev, line6->properties->ep_ctrl_w),
(char *)msg->buffer + done, bytes,
line6_async_request_sent, msg);
}
msg->done += bytes;
retval = usb_submit_urb(urb, GFP_ATOMIC);
if (retval < 0) {
dev_err(line6->ifcdev, "%s: usb_submit_urb failed (%d)\n",
__func__, retval);
usb_free_urb(urb);
kfree(msg);
return retval;
}
return 0;
}
/*
Setup and start timer.
*/
void line6_start_timer(struct timer_list *timer, unsigned long msecs,
void (*function)(unsigned long), unsigned long data)
{
setup_timer(timer, function, data);
mod_timer(timer, jiffies + msecs_to_jiffies(msecs));
}
EXPORT_SYMBOL_GPL(line6_start_timer);
/*
Asynchronously send raw message.
*/
int line6_send_raw_message_async(struct usb_line6 *line6, const char *buffer,
int size)
{
struct message *msg;
struct urb *urb;
/* create message: */
msg = kmalloc(sizeof(struct message), GFP_ATOMIC);
if (msg == NULL)
return -ENOMEM;
/* create URB: */
urb = usb_alloc_urb(0, GFP_ATOMIC);
if (urb == NULL) {
kfree(msg);
return -ENOMEM;
}
/* set message data: */
msg->line6 = line6;
msg->buffer = buffer;
msg->size = size;
msg->done = 0;
/* start sending: */
return line6_send_raw_message_async_part(msg, urb);
}
EXPORT_SYMBOL_GPL(line6_send_raw_message_async);
/*
Send asynchronous device version request.
*/
int line6_version_request_async(struct usb_line6 *line6)
{
char *buffer;
int retval;
buffer = kmemdup(line6_request_version,
sizeof(line6_request_version), GFP_ATOMIC);
if (buffer == NULL)
return -ENOMEM;
retval = line6_send_raw_message_async(line6, buffer,
sizeof(line6_request_version));
kfree(buffer);
return retval;
}
EXPORT_SYMBOL_GPL(line6_version_request_async);
/*
Send sysex message in pieces of wMaxPacketSize bytes.
*/
int line6_send_sysex_message(struct usb_line6 *line6, const char *buffer,
int size)
{
return line6_send_raw_message(line6, buffer,
size + SYSEX_EXTRA_SIZE) -
SYSEX_EXTRA_SIZE;
}
EXPORT_SYMBOL_GPL(line6_send_sysex_message);
/*
Allocate buffer for sysex message and prepare header.
@param code sysex message code
@param size number of bytes between code and sysex end
*/
char *line6_alloc_sysex_buffer(struct usb_line6 *line6, int code1, int code2,
int size)
{
char *buffer = kmalloc(size + SYSEX_EXTRA_SIZE, GFP_ATOMIC);
if (!buffer)
return NULL;
buffer[0] = LINE6_SYSEX_BEGIN;
memcpy(buffer + 1, line6_midi_id, sizeof(line6_midi_id));
buffer[sizeof(line6_midi_id) + 1] = code1;
buffer[sizeof(line6_midi_id) + 2] = code2;
buffer[sizeof(line6_midi_id) + 3 + size] = LINE6_SYSEX_END;
return buffer;
}
EXPORT_SYMBOL_GPL(line6_alloc_sysex_buffer);
/*
Notification of data received from the Line 6 device.
*/
static void line6_data_received(struct urb *urb)
{
struct usb_line6 *line6 = (struct usb_line6 *)urb->context;
struct midi_buffer *mb = &line6->line6midi->midibuf_in;
int done;
if (urb->status == -ESHUTDOWN)
return;
if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
done =
line6_midibuf_write(mb, urb->transfer_buffer, urb->actual_length);
if (done < urb->actual_length) {
line6_midibuf_ignore(mb, done);
dev_dbg(line6->ifcdev, "%d %d buffer overflow - message skipped\n",
done, urb->actual_length);
}
for (;;) {
done =
line6_midibuf_read(mb, line6->buffer_message,
LINE6_MIDI_MESSAGE_MAXLEN);
if (done == 0)
break;
line6->message_length = done;
line6_midi_receive(line6, line6->buffer_message, done);
if (line6->process_message)
line6->process_message(line6);
}
} else {
line6->buffer_message = urb->transfer_buffer;
line6->message_length = urb->actual_length;
if (line6->process_message)
line6->process_message(line6);
line6->buffer_message = NULL;
}
line6_start_listen(line6);
}
#define LINE6_READ_WRITE_STATUS_DELAY 2 /* milliseconds */
#define LINE6_READ_WRITE_MAX_RETRIES 50
/*
Read data from device.
*/
int line6_read_data(struct usb_line6 *line6, unsigned address, void *data,
unsigned datalen)
{
struct usb_device *usbdev = line6->usbdev;
int ret;
unsigned char len;
unsigned count;
if (address > 0xffff || datalen > 0xff)
return -EINVAL;
/* query the serial number: */
ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67,
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
(datalen << 8) | 0x21, address,
NULL, 0, LINE6_TIMEOUT * HZ);
if (ret < 0) {
dev_err(line6->ifcdev, "read request failed (error %d)\n", ret);
return ret;
}
/* Wait for data length. We'll get 0xff until length arrives. */
for (count = 0; count < LINE6_READ_WRITE_MAX_RETRIES; count++) {
mdelay(LINE6_READ_WRITE_STATUS_DELAY);
ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67,
USB_TYPE_VENDOR | USB_RECIP_DEVICE |
USB_DIR_IN,
0x0012, 0x0000, &len, 1,
LINE6_TIMEOUT * HZ);
if (ret < 0) {
dev_err(line6->ifcdev,
"receive length failed (error %d)\n", ret);
return ret;
}
if (len != 0xff)
break;
}
if (len == 0xff) {
dev_err(line6->ifcdev, "read failed after %d retries\n",
count);
return -EIO;
} else if (len != datalen) {
/* should be equal or something went wrong */
dev_err(line6->ifcdev,
"length mismatch (expected %d, got %d)\n",
(int)datalen, (int)len);
return -EIO;
}
/* receive the result: */
ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0), 0x67,
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
0x0013, 0x0000, data, datalen,
LINE6_TIMEOUT * HZ);
if (ret < 0) {
dev_err(line6->ifcdev, "read failed (error %d)\n", ret);
return ret;
}
return 0;
}
EXPORT_SYMBOL_GPL(line6_read_data);
/*
Write data to device.
*/
int line6_write_data(struct usb_line6 *line6, unsigned address, void *data,
unsigned datalen)
{
struct usb_device *usbdev = line6->usbdev;
int ret;
unsigned char status;
int count;
if (address > 0xffff || datalen > 0xffff)
return -EINVAL;
ret = usb_control_msg(usbdev, usb_sndctrlpipe(usbdev, 0), 0x67,
USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
0x0022, address, data, datalen,
LINE6_TIMEOUT * HZ);
if (ret < 0) {
dev_err(line6->ifcdev,
"write request failed (error %d)\n", ret);
return ret;
}
for (count = 0; count < LINE6_READ_WRITE_MAX_RETRIES; count++) {
mdelay(LINE6_READ_WRITE_STATUS_DELAY);
ret = usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
0x67,
USB_TYPE_VENDOR | USB_RECIP_DEVICE |
USB_DIR_IN,
0x0012, 0x0000,
&status, 1, LINE6_TIMEOUT * HZ);
if (ret < 0) {
dev_err(line6->ifcdev,
"receiving status failed (error %d)\n", ret);
return ret;
}
if (status != 0xff)
break;
}
if (status == 0xff) {
dev_err(line6->ifcdev, "write failed after %d retries\n",
count);
return -EIO;
} else if (status != 0) {
dev_err(line6->ifcdev, "write failed (error %d)\n", ret);
return -EIO;
}
return 0;
}
EXPORT_SYMBOL_GPL(line6_write_data);
/*
Read Line 6 device serial number.
(POD, TonePort, GuitarPort)
*/
int line6_read_serial_number(struct usb_line6 *line6, u32 *serial_number)
{
return line6_read_data(line6, 0x80d0, serial_number,
sizeof(*serial_number));
}
EXPORT_SYMBOL_GPL(line6_read_serial_number);
/*
Card destructor.
*/
static void line6_destruct(struct snd_card *card)
{
struct usb_line6 *line6 = card->private_data;
struct usb_device *usbdev = line6->usbdev;
/* Free buffer memory first. We cannot depend on the existence of private
* data from the (podhd) module, it may be gone already during this call
*/
kfree(line6->buffer_message);
kfree(line6->buffer_listen);
/* then free URBs: */
usb_free_urb(line6->urb_listen);
line6->urb_listen = NULL;
/* decrement reference counters: */
usb_put_dev(usbdev);
}
/* get data from endpoint descriptor (see usb_maxpacket): */
static void line6_get_interval(struct usb_line6 *line6)
{
struct usb_device *usbdev = line6->usbdev;
const struct line6_properties *properties = line6->properties;
int pipe;
struct usb_host_endpoint *ep;
if (properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
pipe =
usb_rcvintpipe(line6->usbdev, line6->properties->ep_ctrl_r);
} else {
pipe =
usb_rcvbulkpipe(line6->usbdev, line6->properties->ep_ctrl_r);
}
ep = usbdev->ep_in[usb_pipeendpoint(pipe)];
if (ep) {
line6->interval = ep->desc.bInterval;
if (usbdev->speed == USB_SPEED_LOW) {
line6->intervals_per_second = USB_LOW_INTERVALS_PER_SECOND;
line6->iso_buffers = USB_LOW_ISO_BUFFERS;
} else {
line6->intervals_per_second = USB_HIGH_INTERVALS_PER_SECOND;
line6->iso_buffers = USB_HIGH_ISO_BUFFERS;
}
line6->max_packet_size = le16_to_cpu(ep->desc.wMaxPacketSize);
} else {
dev_err(line6->ifcdev,
"endpoint not available, using fallback values");
line6->interval = LINE6_FALLBACK_INTERVAL;
line6->max_packet_size = LINE6_FALLBACK_MAXPACKETSIZE;
}
}
/* Enable buffering of incoming messages, flush the buffer */
static int line6_hwdep_open(struct snd_hwdep *hw, struct file *file)
{
struct usb_line6 *line6 = hw->private_data;
/* NOTE: hwdep layer provides atomicity here */
line6->messages.active = 1;
return 0;
}
/* Stop buffering */
static int line6_hwdep_release(struct snd_hwdep *hw, struct file *file)
{
struct usb_line6 *line6 = hw->private_data;
line6->messages.active = 0;
return 0;
}
/* Read from circular buffer, return to user */
static long
line6_hwdep_read(struct snd_hwdep *hwdep, char __user *buf, long count,
loff_t *offset)
{
struct usb_line6 *line6 = hwdep->private_data;
long rv = 0;
unsigned int out_count;
if (mutex_lock_interruptible(&line6->messages.read_lock))
return -ERESTARTSYS;
while (kfifo_len(&line6->messages.fifo) == 0) {
mutex_unlock(&line6->messages.read_lock);
rv = wait_event_interruptible(
line6->messages.wait_queue,
kfifo_len(&line6->messages.fifo) != 0);
if (rv < 0)
return rv;
if (mutex_lock_interruptible(&line6->messages.read_lock))
return -ERESTARTSYS;
}
if (kfifo_peek_len(&line6->messages.fifo) > count) {
/* Buffer too small; allow re-read of the current item... */
rv = -EINVAL;
} else {
rv = kfifo_to_user(&line6->messages.fifo, buf, count, &out_count);
if (rv == 0)
rv = out_count;
}
mutex_unlock(&line6->messages.read_lock);
return rv;
}
/* Write directly (no buffering) to device by user*/
static long
line6_hwdep_write(struct snd_hwdep *hwdep, const char __user *data, long count,
loff_t *offset)
{
struct usb_line6 *line6 = hwdep->private_data;
int rv;
char *data_copy;
if (count > line6->max_packet_size * LINE6_RAW_MESSAGES_MAXCOUNT) {
/* This is an arbitrary limit - still better than nothing... */
return -EINVAL;
}
data_copy = memdup_user(data, count);
if (IS_ERR(data_copy))
return PTR_ERR(data_copy);
rv = line6_send_raw_message(line6, data_copy, count);
kfree(data_copy);
return rv;
}
static const struct snd_hwdep_ops hwdep_ops = {
.open = line6_hwdep_open,
.release = line6_hwdep_release,
.read = line6_hwdep_read,
.write = line6_hwdep_write,
};
/* Insert into circular buffer */
static void line6_hwdep_push_message(struct usb_line6 *line6)
{
if (!line6->messages.active)
return;
if (kfifo_avail(&line6->messages.fifo) >= line6->message_length) {
/* No race condition here, there's only one writer */
kfifo_in(&line6->messages.fifo,
line6->buffer_message, line6->message_length);
} /* else TODO: signal overflow */
wake_up_interruptible(&line6->messages.wait_queue);
}
static int line6_hwdep_init(struct usb_line6 *line6)
{
int err;
struct snd_hwdep *hwdep;
/* TODO: usb_driver_claim_interface(); */
line6->process_message = line6_hwdep_push_message;
line6->messages.active = 0;
init_waitqueue_head(&line6->messages.wait_queue);
mutex_init(&line6->messages.read_lock);
INIT_KFIFO(line6->messages.fifo);
err = snd_hwdep_new(line6->card, "config", 0, &hwdep);
if (err < 0)
goto end;
strcpy(hwdep->name, "config");
hwdep->iface = SNDRV_HWDEP_IFACE_LINE6;
hwdep->ops = hwdep_ops;
hwdep->private_data = line6;
hwdep->exclusive = true;
end:
return err;
}
static int line6_init_cap_control(struct usb_line6 *line6)
{
int ret;
/* initialize USB buffers: */
line6->buffer_listen = kmalloc(LINE6_BUFSIZE_LISTEN, GFP_KERNEL);
if (!line6->buffer_listen)
return -ENOMEM;
line6->urb_listen = usb_alloc_urb(0, GFP_KERNEL);
if (!line6->urb_listen)
return -ENOMEM;
if (line6->properties->capabilities & LINE6_CAP_CONTROL_MIDI) {
line6->buffer_message = kmalloc(LINE6_MIDI_MESSAGE_MAXLEN, GFP_KERNEL);
if (!line6->buffer_message)
return -ENOMEM;
} else {
ret = line6_hwdep_init(line6);
if (ret < 0)
return ret;
}
ret = line6_start_listen(line6);
if (ret < 0) {
dev_err(line6->ifcdev, "cannot start listening: %d\n", ret);
return ret;
}
return 0;
}
/*
Probe USB device.
*/
int line6_probe(struct usb_interface *interface,
const struct usb_device_id *id,
const char *driver_name,
const struct line6_properties *properties,
int (*private_init)(struct usb_line6 *, const struct usb_device_id *id),
size_t data_size)
{
struct usb_device *usbdev = interface_to_usbdev(interface);
struct snd_card *card;
struct usb_line6 *line6;
int interface_number;
int ret;
if (WARN_ON(data_size < sizeof(*line6)))
return -EINVAL;
/* we don't handle multiple configurations */
if (usbdev->descriptor.bNumConfigurations != 1)
return -ENODEV;
ret = snd_card_new(&interface->dev,
SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
THIS_MODULE, data_size, &card);
if (ret < 0)
return ret;
/* store basic data: */
line6 = card->private_data;
line6->card = card;
line6->properties = properties;
line6->usbdev = usbdev;
line6->ifcdev = &interface->dev;
strcpy(card->id, properties->id);
strcpy(card->driver, driver_name);
strcpy(card->shortname, properties->name);
sprintf(card->longname, "Line 6 %s at USB %s", properties->name,
dev_name(line6->ifcdev));
card->private_free = line6_destruct;
usb_set_intfdata(interface, line6);
/* increment reference counters: */
usb_get_dev(usbdev);
/* initialize device info: */
dev_info(&interface->dev, "Line 6 %s found\n", properties->name);
/* query interface number */
interface_number = interface->cur_altsetting->desc.bInterfaceNumber;
/* TODO reserves the bus bandwidth even without actual transfer */
ret = usb_set_interface(usbdev, interface_number,
properties->altsetting);
if (ret < 0) {
dev_err(&interface->dev, "set_interface failed\n");
goto error;
}
line6_get_interval(line6);
if (properties->capabilities & LINE6_CAP_CONTROL) {
ret = line6_init_cap_control(line6);
if (ret < 0)
goto error;
}
/* initialize device data based on device: */
ret = private_init(line6, id);
if (ret < 0)
goto error;
/* creation of additional special files should go here */
dev_info(&interface->dev, "Line 6 %s now attached\n",
properties->name);
return 0;
error:
if (line6->disconnect)
line6->disconnect(line6);
snd_card_free(card);
return ret;
}
EXPORT_SYMBOL_GPL(line6_probe);
/*
Line 6 device disconnected.
*/
void line6_disconnect(struct usb_interface *interface)
{
struct usb_line6 *line6 = usb_get_intfdata(interface);
struct usb_device *usbdev = interface_to_usbdev(interface);
if (!line6)
return;
if (WARN_ON(usbdev != line6->usbdev))
return;
if (line6->urb_listen != NULL)
line6_stop_listen(line6);
snd_card_disconnect(line6->card);
if (line6->line6pcm)
line6_pcm_disconnect(line6->line6pcm);
if (line6->disconnect)
line6->disconnect(line6);
dev_info(&interface->dev, "Line 6 %s now disconnected\n",
line6->properties->name);
/* make sure the device isn't destructed twice: */
usb_set_intfdata(interface, NULL);
snd_card_free_when_closed(line6->card);
}
EXPORT_SYMBOL_GPL(line6_disconnect);
#ifdef CONFIG_PM
/*
Suspend Line 6 device.
*/
int line6_suspend(struct usb_interface *interface, pm_message_t message)
{
struct usb_line6 *line6 = usb_get_intfdata(interface);
struct snd_line6_pcm *line6pcm = line6->line6pcm;
snd_power_change_state(line6->card, SNDRV_CTL_POWER_D3hot);
if (line6->properties->capabilities & LINE6_CAP_CONTROL)
line6_stop_listen(line6);
if (line6pcm != NULL) {
snd_pcm_suspend_all(line6pcm->pcm);
line6pcm->flags = 0;
}
return 0;
}
EXPORT_SYMBOL_GPL(line6_suspend);
/*
Resume Line 6 device.
*/
int line6_resume(struct usb_interface *interface)
{
struct usb_line6 *line6 = usb_get_intfdata(interface);
if (line6->properties->capabilities & LINE6_CAP_CONTROL)
line6_start_listen(line6);
snd_power_change_state(line6->card, SNDRV_CTL_POWER_D0);
return 0;
}
EXPORT_SYMBOL_GPL(line6_resume);
#endif /* CONFIG_PM */
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");