As the HD-audio is treated individually in each codec driver, it's
more convenient to assign an own struct device to each codec object.
Then we'll be able to use dev_err() more easily for each codec, for
example.

For achieving it, this patch just creates an object "hdaudioCxDy".
It belongs to sound class instead of creating a new bus, just for
simplicity, at this stage.  No pm ops is implemented in the device
struct level but currently it's merely a container.  The PCM and hwdep
devices are now children of this codec device.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

For referring to a different object from sysfs ops, take hwdep
private_data as stored via dev_set_drvdata() at creating the device
object.  In that way, the same sysfs ops can be used by different
device types.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Instead of calling each time device_create_file(), create the groups
of sysfs attribute files at once in a normal way.  Add a new helper
function, snd_get_device(), to return the associated device object,
so that we can handle the sysfs addition locally.

Since the sysfs file addition is done differently now,
snd_add_device_sysfs_file() helper function is removed.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Some codec drivers still have it since using PCI_VENDOR_ID_*.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Some tags used in the firmware patch file are inconsistent with hwdep
sysfs file names, such as, the firmware patch takes [hint] tag while
sysfs file is */hints.  This makes even me referring back to the
document often.  Let's provide the same tag names as sysfs for
reducing confusions.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Just a code refactoring: the need_codec flag in hda_patch_item struct
can be removed by checking the current mode instead.  No functional
change.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Replace all with the standard EXPORT_SYMBOL_GPL().
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

The usage of strict_strto*() is not preferred, because
strict_strto*() is obsolete. Thus, kstrto*() should be
used.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

It'll be used in hda_generic.c, too.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

The pincfgs, init_verbs and hints set by sysfs or patch might be
changed dynamically on the fly, thus we need to protect it.
Add a simple protection via a mutex.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Remove the leftover __devinit* in comments.
They have been commented out because they couldn't fit with __dev*
although they should have matched.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

CONFIG_SND_HDA_POWER_SAVE is no longer an experimental feature and its
behavior can be well controlled via the default value and module
parameter.  Let's just replace it with the standard CONFIG_PM.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

This is a preliminary work for the deferred probing for
request_firmware() errors at init.

This patch moves the call of request_firmware() to hda_intel.c, and
call it in the earlier stage of probing rather than
azx_probe_continue().
Tested-by: NThierry Reding <thierry.reding@avionic-design.de>
Reviewed-by: NDavid Henningsson <david.henningsson@canonical.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

If a line in the firmware file is larger than the given buffer size (and
so the firmware file size), size is set to a value larger than the actual
buffer size. This results in an overflow in the buffer passed.
Signed-off-by: NAlexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

These aren't modules, but they do make use of these macros, so
they will need export.h to get that definition.  Previously,
they got it via the implicit module.h inclusion.
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>

In the ugly real world, there area really broken devices that don't set
codec SSID correctly.  In such a case, the ID can be random, thus the
patching won't work reliably.

For applying the patch forcibly to such a device, the driver will skip
the vendor and/or subsystem ID checks when zero or a negative number is
given in [codec] section.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Signed-off-by: NDavid Henningsson <diwic@ubuntu.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Allow the override of vendor-id, subsystem-id, revision-id and chip name
via patch loading.  Updated the document, too.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Rewrite the codes to use strict_strtoul() instead of simple_strtoul().
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Makes use of skip_spaces() defined in lib/string.c for removing leading
spaces from strings all over the tree.

It decreases lib.a code size by 47 bytes and reuses the function tree-wide:
   text    data     bss     dec     hex filename
  64688     584     592   65864   10148 (TOTALS-BEFORE)
  64641     584     592   65817   10119 (TOTALS-AFTER)

Also, while at it, if we see (*str && isspace(*str)), we can be sure to
remove the first condition (*str) as the second one (isspace(*str)) also
evaluates to 0 whenever *str == 0, making it redundant. In other words,
"a char equals zero is never a space".

Julia Lawall tried the semantic patch (http://coccinelle.lip6.fr) below,
and found occurrences of this pattern on 3 more files:
    drivers/leds/led-class.c
    drivers/leds/ledtrig-timer.c
    drivers/video/output.c

@@
expression str;
@@

( // ignore skip_spaces cases
while (*str &&  isspace(*str)) { \(str++;\|++str;\) }
|
- *str &&
isspace(*str)
)
Signed-off-by: NAndré Goddard Rosa <andre.goddard@gmail.com>
Cc: Julia Lawall <julia@diku.dk>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Neil Brown <neilb@suse.de>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: David Howells <dhowells@redhat.com>
Cc: <linux-ext4@vger.kernel.org>
Cc: Samuel Ortiz <samuel@sortiz.org>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Takashi Iwai <tiwai@suse.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Added the power on/off counter and expose via sysfs files.
The sysfs files, power_on_acct and power_off_acct, are created under
each codec hwdep sysfs directory (e.g. /sys/class/sound/hwC0D0).
The files show the msec length of the codec power-on and power-off,
respectively.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Added the patch module option to apply a "patch" as a firmware to
modify pin configurations or give additional hints to the driver
before actually initializing and configuring the codec.

This can be used as a workaround when the BIOS doesn't give sufficient
information or give wrong information that doesn't match with the real
hardware setup, until it's fixed statically in the driver via a quirk.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Split the name string in hda_codec struct to vendor_name and chip_name
strings to be stored directly from the preset name.
Since mostly only the chip name is referred in many patch_*.c, this
results in the reduction of many codes in the end.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Change the power state of each widget before starting the initialization
work so that all verbs are executed properly.

Also, keep power-up during hwdep reconfiguration.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Added the show method for init_verbs and hints hwdep sysfs entries.
They show the current values.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Added snd_hda_get_hint() and snd_hda_get_bool_hint() helper functions
to retrieve a hint value.

Internally, the hint is stored in a pair of two strings, key and val.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Added the pseudo device-locking using card->shutdown flag to avoid
the crash via clear/reconfig during operations.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Rename from override_pin and cur_pin with user_pin and driver_pin,
respectively, to be a bit more intuitive.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Added the generic pincfg cache and save/restore functions.
Also introduced the pin-overriding via hwdep sysfs.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Fixed the parse of init_verbs hwdep sysfs entry.
Simplieied using sscanf.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

The devices that have been newly added during reconfig must be
registered.  Otherwise they won't be visible to user-space.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Split the monolithc HD-audio driver into several pieces:
 - snd-hda-intel   HD-audio PCI controller driver; loaded via udev
 - snd-hda-codec   HD-audio codec bus driver
 - snd-hda-codec-* Specific HD-audio codec drivers

When built as modules, snd-hda-codec (that is invoked by snd-hda-intel)
looks up the codec vendor ID and loads the corresponding codec module
automatically via request_module().

When built in a kernel, each codec drivers are statically hooked up
before probing the PCI.

This patch adds appropriate EXPORT_SYMBOL_GPL()'s and the module
information for each driver, and driver-linking codes between
codec-bus and codec drivers.

TODO:
  - Avoid EXPORT_SYMBOL*() when built-in kernel
  - Restore __devinit appropriately depending on the condition
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

The reconfiguration of PCM affected all PCM streams on the bus, but
this this should be done rather only for the target codec.

This patch does the following:
- introduce bitmap indicating the PCM device usages on a hda_bus
- refactor the PCM build functions
- fix __devinit prefix in some fucntions
- add a proper ifdef around HDA-reconfig-specific functions
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Make the codec re-configuration feature selectable via Kconfig,
CONFIG_SND_HDA_RECONFIG.
Also mark it as experimental (as it really is).
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

This patch adds the "hints" for reconfiguring codecs.  The hints
are simply string arrays and can be freely used/parsed by the codec
patch.  The hints can be input via hwdep sysfs files.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

This patch enables the additional init verbs for each codec.  The verbs
can be entered via hwdep sysfs file.  These verbs are executed at
reconfiguring the codec for non-standard setups like overriding
the pin-defcfg.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Added the sysfs entries to hwdep devices so that the new features
like reconfiguration can be done via sysfs.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Replace CONFIG_SND_DEBUG_DETECT with CONFIG_SND_DEBUG_VERBOSE to
represent its meaning more better.  This config isn't provided only
for the detection but for more verbose debug prints in general.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

This header file exists only for some hacks to adapt alsa-driver
tree.  It's useless for building in the kernel.  Let's move a few
lines in it to sound/core.h and remove it.
With this patch, sound/driver.h isn't removed but has just a single
compile warning to include it.  This should be really killed in
future.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@perex.cz>

Fix missing cast:
    sound/pci/hda/hda_hwdep.c:86: warning: passing argument 4 of 'hda_hwdep_ioctl' makes integer from pointer without a cast
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>