开机音乐功能

配置boottone_used为1,表示使用开机音乐功能
;----------------------------------------------------------------------------------
;boot tone configuration
;
;boottone_used ---boot tone enable
;len_limit ---set size in bytes, normally do not need to set it and driver will use
file size
;----------------------------------------------------------------------------------
[boottone]
boottone_used = 1

另外codec节点也需要配置正确,下面是部分重要配置
[codec]
codec_used = 0x1
lineout_vol =0x1a
gpio-spk = port:PH9<1><1><1><1>

开机音乐的音频文件需要放置在单独一个分区中，例如boottone分区，修改sys_partition.fex
文件：
[partition]
name = boottone
size = 2048
downloadfile = "boottone.fex"
user_type = 0x8000

上述 2048 表示1M的空间,注意根据实际音频文件大小填写合适的size
然后将音频文件重命名为boottone.fex,并放置到方案配置目录下，以cowbell-perf1方案
为例：
mv kaiji.wav target/allwinner/cowbell-perf1/configs/boottone.fex

主要增下面几行：
uboot_tone_addr=0x4327ffd4
boottone_partition=boottone
load_boottone=sunxi_flash read ${uboot_tone_addr} ${boottone_partition}

uboot_tone_addr用于指定音频文件加载到dram的地址
boottone_partition用于指定音频文件所在分区名
load_boottone用于加载音频文件到dram的命令

make kernel_menuconfig去除下面几个配置：
@@ -702,14 +705,9 @@ CONFIG_SND_SOC_I2C_AND_SPI=y
# CONFIG_SND_SOC_WM8960 is not set
# CONFIG_SND_SOC_WM8974 is not set
# CONFIG_SND_SOC_WM8985 is not set
-CONFIG_SND_SUN8IW18_CODEC=y
# CONFIG_SND_SUNXI_MAD is not set
-CONFIG_SND_SUNXI_SOC=y
-CONFIG_SND_SUNXI_SOC_CPUDAI=y
-CONFIG_SND_SUNXI_SOC_DAUDIO=y
-CONFIG_SND_SUNXI_SOC_RWFUNC=y
-CONFIG_SND_SUNXI_SOC_SUN8IW18_CODEC=y
-CONFIG_SND_SUNXI_SOC_SUNXI_DAUDIO=y
+# CONFIG_SND_SUNXI_SOC_SUN8IW18_CODEC is not set
+# CONFIG_SND_SUNXI_SOC_SUNXI_DAUDIO is not set
# CONFIG_SND_SUNXI_SOC_SUNXI_DMIC is not set
# CONFIG_SND_SUNXI_SOC_SUNXI_SPDIF is not set
CONFIG_SND_SUPPORT_OLD_API=y

@@ -2923,7 +2929,7 @@ CONFIG_PACKAGE_kmod-sound-core=y

# CONFIG_PACKAGE_kmod-sound-soc-ac97 is not set

# CONFIG_PACKAGE_kmod-sound-soc-core is not set

# CONFIG_PACKAGE_kmod-sound-via82xx is not set

-# CONFIG_PACKAGE_kmod-sunxi-sound is not set
+CONFIG_PACKAGE_kmod-sunxi-sound=y