1menu "Sound support" 2 3config SOUND 4 bool "Enable sound support" 5 help 6 Support making sounds through an audio codec. This is normally a 7 beep at a chosen frequency for a selected length of time. However 8 the drivers support playing arbitrary sound samples using a 9 PCM interface. 10 11 Note: At present the sound setup is somewhat tangled up in that the 12 audio codecs are called from the sound-i2s code. This could be 13 converted to driver model. 14 15config I2S 16 bool "Enable I2S support" 17 depends on SOUND 18 help 19 I2S is a serial bus often used to transmit audio data from the 20 SoC to the audio codec. This option enables sound support using 21 I2S. It calls either of the two supported codecs (no use is made 22 of driver model at present). 23 24config I2S_ROCKCHIP 25 bool "Enable I2S support for Rockchip SoCs" 26 depends on I2S 27 help 28 Rockchip SoCs support an I2S interface for sending audio data to an 29 audio codec. This option enables support for this, using one of the 30 available audio codec drivers. This driver does not make use of 31 DMA, but writes each word directly to the hardware. 32 33config I2S_SAMSUNG 34 bool "Enable I2C support for Samsung SoCs" 35 depends on I2S 36 help 37 Samsung Exynos SoCs support an I2S interface for sending audio 38 data to an audio codec. This option enables support for this, 39 using one of the available audio codec drivers. Enabling this 40 option provides an implementation for sound_init() and 41 sound_play(). 42 43config SOUND_I8254 44 bool "Intel i8254 timer / beeper" 45 depends on SOUND 46 help 47 This enables support for a beeper that uses the i8254 timer chip. 48 This can emit beeps at a fixed frequency. It is possible to control 49 the length of the beeps, by turning a beep on, waiting for a period 50 of time, then turning it off. 51 52 This is quite an old feature, called PIT (Programmable Interval 53 Timer), but is nonetheless still available on modern x86 machines. 54 55config SOUND_INTEL_HDA 56 bool "Intel HDA audio codec" 57 depends on SOUND 58 help 59 Most Intel chips have an HDA (High-definition audio) codec which can 60 be used by U-Boot to play simple beeps. This is also sometimes called 61 Azalia which was the development code-name. It requires setup 62 information in the device tree (see intel-hda.txt). 63 64config SOUND_IVYBRIDGE 65 bool "Intel Ivybridge sound support" 66 depends on SOUND 67 select SOUND_INTEL_HDA 68 help 69 Enable sound output on supported Intel Ivybridge-based boards. This 70 driver uses Intel's High-definition Audio (HDA) architecture, 71 sometimes called Azalia. The audio codec is detected using a 72 semi-automatic mechanism. 73 74config SOUND_MAX98088 75 bool "Support Maxim max98088 audio codec" 76 depends on I2S 77 help 78 Enable the max98088 audio codec. This is connected via I2S for 79 audio data and I2C for codec control. At present it only works 80 with the Samsung I2S driver. 81 82config SOUND_MAX98090 83 bool "Support Maxim max98090 audio codec" 84 depends on I2S 85 help 86 Enable the max98090 audio codec. This is connected via I2S for 87 audio data and I2C for codec control. At present it only works 88 with the Samsung I2S driver. 89 90config SOUND_MAX98095 91 bool "Support Maxim max98095 audio codec" 92 depends on I2S 93 help 94 Enable the max98095 audio codec. This is connected via I2S for 95 audio data and I2C for codec control. At present it only works 96 with the Samsung I2S driver. 97 98config SOUND_RT5677 99 bool "Support Realtek RT5677 audio codec" 100 depends on SOUND 101 help 102 Enable the Realtek RT5677 audio codec. This is an I2S device used on 103 some Chromebooks from around 2015 ('auron'). It is configured using 104 an I2C interface and supports multiple sound inputs and outputs, 105 including digital microphones. 106 107config SOUND_SANDBOX 108 bool "Support sandbox emulated audio codec" 109 depends on SANDBOX && SOUND 110 help 111 U-Boot sandbox can emulate a sound device using SDL, playing the 112 sound on the host machine. This option implements the sound_init() 113 and sound_play() functions for sandbox. Note that you must install 114 the SDL libraries for this to work. 115 116config SOUND_WM8994 117 bool "Support Wolfson Micro wm8994 audio codec" 118 depends on I2S_SAMSUNG 119 help 120 Enable the wm8994 audio codec. This is connected via I2S for 121 audio data and I2C for codec control. At present it only works 122 with the Samsung I2S driver. 123 124endmenu 125