Add support for the Line6 POD HD500X multi effect processor for
playback and capture (in/out audio) through USB.
Signed-off-by: NHans P. Moller <hmoller@uc.cl>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Userspace apps have to claim USB interfaces before using endpoints in
them (drivers/usb/core/devio.c:checkintf()). It's a lock mechanism so
that two "drivers" don't steal data from each other. Kernel drivers don't
have to claim interfaces to work - but they should, to lock out userspace.

While there, fix line6_properties struct to match checkpatch.pl.
Signed-off-by: NAndrej Krutak <dev@andree.sk>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

The commit c039aaa7 was incomplete,
missing part of the setup for Live. This makes also audio input work,
in addition to audio output.

Fixes: c039aaa7Reported-by: NEddi De Pieri <eddi@depieri.net>
Signed-off-by: NAndrej Krutak <dev@andree.sk>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Only initialize PCM for POD HD devices that support it.
No POD HD seems to support MIDI, thus drop the initialization.
Signed-off-by: NAndrej Krutak <dev@andree.sk>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Signed-off-by: NAndrej Krutak <dev@andree.sk>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

This includes audio in/out and basic initialization via control EP (emulates
what original driver does). The initialization is done similarly to original
POD, firmware and serial IDs are read and exported via sysfs.
Signed-off-by: NAndrej Krutak <dev@andree.sk>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Changes bytes_per_frame to bytes_per_channel.
Signed-off-by: NAndrej Krutak <dev@andree.sk>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Provide a unique name for each driver instead of using "line6usb" for
all of them.  This will allow for different configurations based on the
driver type.
Signed-off-by: NChris Rorvick <chris@rorvick.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

It's just superfluous and doesn't give any better readability.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

It's identical with struct usb_line6.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Most of them are rather relevant with the definitions in driver.h,
and there are only a few lines, so just rip it off.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Just reformatting the comments and typos fixed, no functional
changes.  Particularly,
- avoid the kerneldoc marker "/**",
- reduce multiple comment lines into single lines,
- corrected wrongly referred function names
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Instead of allocating the private data individually in each driver's
probe at first, let snd_card_new() allocate the data that is called in
line6_probe().  This simplifies the primary probe functions.
Tested-by: NChris Rorvick <chris@rorvick.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

The interface argument is used just for retrieving the assigned
device, which can be already found in line6->ifcdev.  Drop them from
the callbacks.  Also, pass the usb id to private_init so that the
driver can deal with it there.  This is a preliminary work for the
further cleanup to move the whole allocation into driver.c.
Tested-by: NChris Rorvick <chris@rorvick.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

The interface and driver objects are always set when callbacks are
called.  Drop such superfluous NULL checks in init and disconnect
calls of each driver.
Tested-by: NChris Rorvick <chris@rorvick.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

The correct spelling includes the space.  Fix this in strings and
comments that refer to the manufacturer.
Signed-off-by: NChris Rorvick <chris@rorvick.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

This is a fairly big rewrite regarding the card resource management in
line6 drivers:

- The card creation is moved into line6_probe().  This adds the global
  destructor to private_free, so that each driver doesn't have to call
  it any longer.

- The USB disconnect callback handles the card release, thus each
  driver needs to concentrate on only its own resources.  No need to
  snd_card_*() call in the destructor.

- Fix the potential stall in disconnection by removing
  snd_card_free().   It's replaced with snd_card_free_when_closed()
  for asynchronous release.

- The only remaining operation for the card in each driver is the call
  of snd_card_register().  All the rest are dealt in the common module
  by itself.

- These ended up with removal of audio.[ch] as a result of a reduction
  of one layer.  Each driver just needs to call line6_probe().
Tested-by: NChris Rorvick <chris@rorvick.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

The line6 drivers don't support the full resume although they set
SNDRV_PCM_INFO_RESUME.  These flags have to be dropped to inform
properly to the user-space.

Also, drop the CONFIG_PM in trigger callbacks, too, which are rather
superfluous.
Tested-by: NChris Rorvick <chris@rorvick.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Split to each individual driver for POD, PODHD, TonePort and Variax
with a core LINE6 helper module.  The new modules follow the standard
ALSA naming rule with snd prefix: snd-usb-pod, snd-usb-podhd,
snd-usb-toneport and snd-usb-variax, together with the corresponding
CONFIG_SND_USB_* Kconfig items.
Tested-by: NChris Rorvick <chris@rorvick.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Promote line6 driver from staging to sound/usb/line6 directory, and
maintain through sound subsystem tree.

This commit just moves the code and adapts Makefile / Kconfig.
The further renames and misc cleanups will follow.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Remove declarations from the header and move the definitions up in the
source so they need not be forward declared.
Signed-off-by: NChris Rorvick <chris@rorvick.com>
Reviewed-by: NStefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Which *_disconnect() to call on disconnect is known at initialization.
Add a function pointer to the `usb_line6' struct and use to call into
the appropriate logic instead of evaluating the conditional logic.
Signed-off-by: NChris Rorvick <chris@rorvick.com>
Reviewed-by: NStefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Casting the `struct usb_line6' pointer at the call point makes the code
difficult to read.  This is substantially cleaned up by moving the cast
into the callees.
Signed-off-by: NChris Rorvick <chris@rorvick.com>
Reviewed-by: NStefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

The line6 driver checks struct field addresses for NULL where it does
not make sense to do so.  The struct has already been checked for NULL
and there is no value in checking the first field's address too.
Suggested-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NStefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: NMarkus Grabner <grabner@icg.tugraz.at>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

The Pod HD device family uses new MIDI SysEx messages and therefore
cannot reuse the existing Pod code.  Instead of hardcoding Pod HD MIDI
messages into the driver, leave MIDI up to userspace.  This driver
simply presents MIDI and pcm ALSA devices.

This device is similar to the Pod except that it has 48 kHz audio and
does not respond to Pod SysEx messages.
Signed-off-by: NStefan Hajnoczi <stefanha@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>