+menu "Sound support"
+
+config SOUND
+ bool "Enable sound support"
+ help
+ Support making sounds through an audio codec. This is normally a
+ beep at a chosen frequency for a selected length of time. However
+ the drivers support playing arbitrary sound samples using a
+ PCM interface.
+
+ Note: At present the sound setup is somewhat tangled up in that the
+ audio codecs are called from the sound-i2s code. This could be
+ converted to driver model.
+
+config I2S
+ bool "Enable I2S support"
+ depends on SOUND
+ help
+ I2S is a serial bus often used to transmit audio data from the
+ SoC to the audio codec. This option enables sound support using
+ I2S. It calls either of the two supported codecs (no use is made
+ of driver model at present).
+
+config I2S_ROCKCHIP
+ bool "Enable I2S support for Rockchip SoCs"
+ depends on I2S
+ help
+ Rockchip SoCs support an I2S interface for sending audio data to an
+ audio codec. This option enables support for this, using one of the
+ available audio codec drivers. This driver does not make use of
+ DMA, but writes each word directly to the hardware.
+
+config I2S_SAMSUNG
+ bool "Enable I2C support for Samsung SoCs"
+ depends on I2S
+ help
+ Samsung Exynos SoCs support an I2S interface for sending audio
+ data to an audio codec. This option enables support for this,
+ using one of the available audio codec drivers. Enabling this
+ option provides an implementation for sound_init() and
+ sound_play().
+
+config SOUND_I8254
+ bool "Intel i8254 timer / beeper"
+ depends on SOUND
+ help
+ This enables support for a beeper that uses the i8254 timer chip.
+ This can emit beeps at a fixed frequency. It is possible to control
+ the length of the beeps, by turning a beep on, waiting for a period
+ of time, then turning it off.
+
+ This is quite an old feature, called PIT (Programmable Interval
+ Timer), but is nonetheless still available on modern x86 machines.
+
+config SOUND_INTEL_HDA
+ bool "Intel HDA audio codec"
+ depends on SOUND
+ help
+ Most Intel chips have an HDA (High-definition audio) codec which can
+ be used by U-Boot to play simple beeps. This is also sometimes called
+ Azalia which was the development code-name. It requires setup
+ information in the device tree (see intel-hda.txt).
+
+config SOUND_IVYBRIDGE
+ bool "Intel Ivybridge sound support"
+ depends on SOUND
+ select SOUND_INTEL_HDA
+ help
+ Enable sound output on supported Intel Ivybridge-based boards. This
+ driver uses Intel's High-definition Audio (HDA) architecture,
+ sometimes called Azalia. The audio codec is detected using a
+ semi-automatic mechanism.
+
+config I2S_TEGRA
+ bool "Enable I2S support for Nvidia Tegra SoCs"
+ depends on I2S
+ select TEGRA124_DMA
+ help
+ Nvidia Tegra SoCs support several I2S interfaces for sending audio
+ data to an audio codec. This option enables support for this,
+ using one of the available audio codec drivers.
+
+config SOUND_MAX98088
+ bool "Support Maxim max98088 audio codec"
+ depends on I2S
+ help
+ Enable the max98088 audio codec. This is connected via I2S for
+ audio data and I2C for codec control. At present it only works
+ with the Samsung I2S driver.
+
+config SOUND_MAX98090
+ bool "Support Maxim max98090 audio codec"
+ depends on I2S
+ help
+ Enable the max98090 audio codec. This is connected via I2S for
+ audio data and I2C for codec control. At present it only works
+ with the Samsung I2S driver.
+
+config SOUND_MAX98095
+ bool "Support Maxim max98095 audio codec"
+ depends on I2S
+ help
+ Enable the max98095 audio codec. This is connected via I2S for
+ audio data and I2C for codec control. At present it only works
+ with the Samsung I2S driver.
+
+config SOUND_RT5677
+ bool "Support Realtek RT5677 audio codec"
+ depends on SOUND
+ help
+ Enable the Realtek RT5677 audio codec. This is an I2S device used on
+ some Chromebooks from around 2015 ('auron'). It is configured using
+ an I2C interface and supports multiple sound inputs and outputs,
+ including digital microphones.
+
+config SOUND_SANDBOX
+ bool "Support sandbox emulated audio codec"
+ depends on SANDBOX && SOUND
+ help
+ U-Boot sandbox can emulate a sound device using SDL, playing the
+ sound on the host machine. This option implements the sound_init()
+ and sound_play() functions for sandbox. Note that you must install
+ the SDL libraries for this to work.
+
+config SOUND_WM8994
+ bool "Support Wolfson Micro wm8994 audio codec"
+ depends on I2S_SAMSUNG
+ help
+ Enable the wm8994 audio codec. This is connected via I2S for
+ audio data and I2C for codec control. At present it only works
+ with the Samsung I2S driver.
+
+endmenu
projects / oweals / u-boot.git / blobdiff