一、AC108驱动移植

1、驱动添加

cp r18/lichee/linux-4.4/sound/soc/codecs/ac108.* a64/linux-3.10/sound/soc/codecs/

2、Kconfig、Makefile修改

linux-3.10\sound\soc\codecs\Kconfig修改：

menu "CODEC drivers"

config SND_SOC_ALL_CODECS

# ac108 config

config SND_SOC_AC108

tristate "ac108 mic array "

depends on ARCH_SUN50IW1

select SND_SUNXI_SOC_SUNXI_DAUDIO

default n

help

say Y or M if you want to add support for AC108.

endmenu

r18 sound/soc/codecs/Kconfig配置

SND_SUNXI_SOC_SUNXI_DAUDIO

ac108添加

Device Drivers  --->

<*> Sound card support  --->

<*>   Advanced Linux Sound Architecture  --->

<*>   ALSA for SoC audio support  --->

CODEC drivers  --->

<*> ac108 mic array

sunxi-snddaudio0添加

Device Drivers  --->

<*> Sound card support  --->

<*>   Advanced Linux Sound Architecture  --->

<*>   ALSA for SoC audio support  --->

<*>   ASoC support for SUNXI  --->

<*>   ASoC support for daudio0 machine

二、buildroot

https://www.cnblogs.com/zhangshenghui/p/11008115.html

三、耳机喇叭驱动

查看A64开发板声卡驱动

在linux-3.10内核代码中搜索audiocodec关键字，查找到如下:

推断在sunxi_sndcodec.c中，查看linux-3.10\sound\soc\sunxi\目录下Kconfig和Makefile查看内核配置信息打开。

四、内核配置文件

1、驱动设备树

linux-3.10/arch/arm64/boot/dts/sun50iw1p1.dtsi

五、R18 ac108、tas5731驱动

ac108 驱动目录：

linux-4.4\sound\soc\codecs\ac108.c

tas5731驱动目录：

linux-4.4\sound\soc\codecs\tas5731.c

sun50iw1p1-tulip-noma.dts文件查看设备树配置：

跟踪查找snddaudio-codec-dai关键字，sunxi-snddaudio.c

查看 /proc/asound/cards文件

在SDK 查找 sndac10810035发现：

ERROR (duplicate_label): Duplicate label 'twi0' on /soc@01c00000/twi@0x0x01C2AC00 and /soc@01c00000/twi@0x01c2ac00

ERROR: Input tree has errors, aborting (use -f to force output)

make[1]: *** [arch/arm64/boot/dts/sun50iw1p1-soc.dtb] Error 2

六、adb

参考网站：

https://www.cnblogs.com/zengjfgit/p/6289873.html

1. 编译拷贝模块：make modules && make modules_install INSTALL_MOD_PATH=~/rootfs

2. modprobe g_ffs idVendor=0x18d1 idProduct=0x4e42 iSerialNumber="buildroot"

3. mkdir -p /dev/usb-ffs/adb

4. mount -t functionfs adb /dev/usb-ffs/adb -o uid=2000,gid=2000

5. adbd &

6. 插上USB OTG线，会先安装驱动，安装完成后，可以使用adb工具了。
    7. Ubuntu里可以直接安装一下android adb tool就可以连接了。

备份：

改后：

七、A64喇叭播放

amixer cset name='Earpiece Switch' 'on'

amixer cset name='earpiece volume' '31'

aplay music_16_2.wav &

喇叭和耳机同时播放，Earpiece Switch控制开关，earpiece volume控制音量

八、A64移植tina系统

ERROR: "sunxi_wlan_get_oob_irq_flags" [drivers/net/wireless/bcmdhd/bcmdhd.ko] undefined!

ERROR: "sunxi_wlan_get_bus_index" [drivers/net/wireless/bcmdhd/bcmdhd.ko] undefined!

ERROR: "sunxi_wlan_set_power" [drivers/net/wireless/bcmdhd/bcmdhd.ko] undefined!

ERROR: "sunxi_wlan_get_oob_irq" [drivers/net/wireless/bcmdhd/bcmdhd.ko] undefined!

make[6]: *** [__modpost] Error 1

make[5]: *** [modules] Error 2

make[5]: Leaving directory `/home/danny/share/allwinner/sdk/A64/r18_tina/lichee/linux-4.4'

make[4]: *** [/home/danny/share/allwinner/sdk/A64/r18_tina/out/tulip-noma/compile_dir/target/linux-tulip-noma/linux-4.4.89/.image] Error 2

make[4]: Leaving directory `/home/danny/share/allwinner/sdk/A64/r18_tina/target/allwinner/tulip-noma'

make[3]: *** [install] Error 2

make[3]: Leaving directory `/home/danny/share/allwinner/sdk/A64/r18_tina/target/allwinner'

make[2]: *** [target/allwinner/install] Error 2

make[2]: Leaving directory `/home/danny/share/allwinner/sdk/A64/r18_tina'

make[1]: *** [/home/danny/share/allwinner/sdk/A64/r18_tina/out/tulip-noma/staging_dir/target/stamp/.target_install] Error 2

make[1]: Leaving directory `/home/danny/share/allwinner/sdk/A64/r18_tina'

make: *** [world] Error 2

九、麦克风采集与喇叭播放放到I2S0上

static void sunxi_daudio_txctrl_enable(struct sunxi_daudio_info *sunxi_daudio,

int enable)

static void sunxi_daudio_rxctrl_enable(struct sunxi_daudio_info *sunxi_daudio,

int enable)

pinctrl_select_state

static int sunxi_daudio_dai_startup(struct snd_pcm_substream *substream,

struct snd_soc_dai *dai)