APPLIED: USB: set device dma_mask without reference to global data

Many USB host drivers contain code such as:

if (!pdev->dev.dma_mask)
        pdev->dev.dma_mask = &tegra_ehci_dma_mask;

... where tegra_ehci_dma_mask is a global. I suspect this code originated
in commit 4a53f4e "USB: ehci-tegra: add probing through device tree" and
was simply copied everywhere else.

This works fine when the code is built-in, but can cause a crash when the
code is in a module. The first module load sets up the dma_mask pointer,
but if the module is removed and re-inserted, the value is now non-NULL,
and hence is not updated to point at the new location, and hence points
at a stale location within the previous module load address, which in
turn causes a crash if the pointer is de-referenced.

The simplest way of solving this seems to be to copy the code from
ehci-platform.c, which uses the coherent_dma_mask as the target for the
dma_mask pointer.

Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
ARM: tegra: use #include for all device trees

Replace /include/ (dtc) with #include (C pre-processor) for all Tegra DT
files, so that gcc -E handles the entire include tree, and hence any of
those files can #include some other file e.g. for constant definitions.

This allows future use of #defines and header files in order to define
names for various constants, such as the IDs and flags in GPIO
specifiers. Use of those features will increase the readability of the
device tree files.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
ARM: tegra: create a DT header defining GPIO IDs

All Tegra GPIOs are named after the GPIO bank and GPIO number within
the bank. Define a macro to calculate the GPIO ID based on those
parameters. Make the macro available via all Tegra .dtsip files.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
ARM: tegra: convert device tree files to use GPIO defines

Use TEGRA_GPIO() macro to name all GPIOs referenced by GPIO properties,
and some interrupts properties. Use standard GPIO flag defines too.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
ARM: tegra: convert device tree files to use IRQ defines

Use the GIC and standard IRQ binding defines in all IRQ specifiers.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
ARM: tegra: add audio-related nodes to Tegra114 DT

Add nodes for the Tegra114 AHUB and I2S controllers.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
ARM: tegra: fix memory size on Beaver

Tegra30's boot ROM masks the top 1MiB of RAM. Fix the memory node in
Beaver's DT file to reflect this.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
ARM: call disable_nonboot_cpus() from machine_shutdown()

On Tegra at least, this change allows kexec to work with SMP enabled.
Without this,  machine_shutdown() simply puts all CPUs into a loop. If
the code of that loop is over-written, the CPUs may hang or crash (which
I do observe in practice), or cause the kexec'd kernel not to be able to
initialize them.

This fix has the added benefit that the kexec always happens on the boot
CPU, and thus kexec mirrors the initial kernel boot as much as possible.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Will Deacon <will.deacon@arm.com>
BROKEN: ARM: tegra: trimslice: enable DVI port

The DVI port is driven from the "RGB" port, via a DVI encoder chip.

BROKEN:
* Booting with just DVI plugged in yields a signal the monitor can't sync to.
* Booting with HDMI, then moving the cable to DVI yields incorrect colors and
  a lower resolution than the panel's native resolution (1024x768@67Hz!).

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
[swarren: extracted from a larger patch by Thierry]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
BROKEN: ARM: tegra: cardhu: enable HDMI port

BROKEN because the only bootloaders we have already enable the LCD scanout,
and dual-display stresses the memory bandwidth too much, because the memory
controller programming is way off on Cardhu right now.

Signed-off-by: Mark Zhang <markz@nvidia.com>
[swarren: extracted from a larger patch by Mark]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Revert "BROKEN: ARM: tegra: cardhu: enable HDMI port"

This reverts commit 17c37e0079ade1e6140002dd4ef0f79e08f185c9.
HACK: ARM: dt: tegra: cardhu: Enable LCD panel

HACK: it's missing any of the panel/backlight control GPIOs etc.

Signed-off-by: Mark Zhang <markz@nvidia.com>
[swarren: extracted from a larger patch by Mark]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
LOCAL HACK: tegra_defconfig changes

Signed-off-by: Stephen Warren <swarren@nvidia.com>
ARM: tegra: bluetooth testing hacks for Cardhu

Signed-off-by: Stephen Warren <swarren@nvidia.com>
ASoC: add RT5640 CODEC driver

Note: This driver was originally written by Johnny Hsu at Realtek
according to comment in the file. Hence, the git author field contains
Johnny's name. However, the driver was provided as a .zip file without
any signed-off-by line. When I contacted Realtek to obtain one, Bard
responded with his, hence it is included below. Since they work for the
same company, I assume this is acceptable.

This driver is based on a copy Realtek gave NVIDIA over 2 years ago, plus
some fixes NVIDIA applied internally, plus various cleanup I (swarren)
performed during upstreaming. Realtek does have a newer base version of
this driver, but the speakers don't appear to work in that version, so
I ignored it for now. Hopefully, the changes in that driver will trickle
upstream after this.

I (swarren) made the following changes relative to downstream, so I
should be blamed for:
* Replaced separate HPOL MIX and HPOR MIX with a single HPO MIX, since
  there is only 1 control in HW. This change was taken from Realtek's
  latest driver.
* Replaced SND_SOC_DAPM_MICBIAS with SND_SOC_DAPM_SUPPLY, although I
  can't test this yet.
* Renamed Mono outputs to MONO to match documentation and be consistent
  with all other inputs/outputs. Renamed micbias inputs to MICBIAS too.
* Trimmed down the register init table to remove entries that duplicate
  ASoC widgets. Added a couple missing widgets (Speaker Playback Switch,
  Speaker Channel Switch, HP Channel Switch) to support this.
* Removed support for RT5643, since I can't test that.
* Removed support for rt5640_headset_detect(), since I can't test it, and
  the style doesn't seem to match what I've seen in other CODECs.
* Update probe() to call rt5640_set_bias_level() to avoid duplicate code.
* Minor changes to adapt to recent kernel changes:
  * Make use of module_i2c_driver.
  * Remove use of devinit/devexit.
* Removed a bunch of ifdef'd and dead code.
* Formatting, checkpatch, and warning fixes.

I've tested playback to the speaker and headphone outputs, but not:
* The "OUT" output.
* Any capture path.

Cc: Bard Liao <bardliao@realtek.com>
Cc: Johnny Hsu <johnnyhsu@realtek.com>
Cc: Oder Chiou <oder_chiou@realtek.com>
Cc: Flove <flove@realtek.com>
Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
---
v2:
* Make use of new "mixer control sharing" feature for HPO MIX L/R.

Mark, a couple questions:
* Is the custom index_reg device attr file OK, or should I remove that?
* Do new CODEC drivers have to use regmap directly, or is using the ASoC
  IO system still OK?
ASoC: tegra: add tegra+RT5640 machine driver

FIXME: describe this

Signed-off-by: Stephen Warren <swarren@nvidia.com>
ARM: tegra: enable audio on Dalmore

Dalmore uses the RT5640 audio CODEC. Instantiate this on the I2C bus.
Enable the relevant Tegra I2C controller. Add the top-level "sound" node
to hook everything together, and provide a "sound card" device.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
ARM: tegra: defconfig updates for audio on Dalmore

Enable the ASoC machine driver that is required for audio on Dalmore.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
HACK: Attempt to get DMICs working
ARM: tegra: enable audio on Beaver

FIXME: Need to run "gpio set 186" in U-Boot before booting the kernel,
to enable LDO1_EN to get the CODEC to show up on the I2C bus.

Signed-off-by: Stephen Warren <swarren@nvidia.com>