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