UDA1341TS驱动在FL2440的移植(2.6.33.7内核)

iletlet

一、移植环境

    主  机：Fedora 14 （kernel-2.6.33.7）
    开发板：FL2440(nandflash:K9F1G08 128MB)

    编译器：arm-linux-gcc-4.3.2

 

二、移植步骤

    1. 根据FL2440赠送的光盘资料可以得知，FL2440的声卡是采用PHILIPS公司的UDA1341TS型号的声卡。在没有声卡uda驱动之前，启动开发板，从系统启动信息可以看到声卡跟s3c2440的I2S并没有映射起来。

1. usbcore: registered new interface driver hiddev
   
2. usbcore: registered new interface driver usbhid
   
3. usbhid: USB HID core driver
   
4. No device for DAI UDA134X
   
5. No device for DAI s3c24xx-i2s
   
6. ALSA device list:
   
7. No soundcards found.

     2. uda驱动的移植也主要是以linux-2.6.33.7内核中自带的驱动程序为主，我只是做少量的修改与配置。打开mach-smdk2440.c文件开始配置。

1. #vim arch/arm/mach-s3c2440/mach-smdk2440.c

    增加头两个用到的文件:

1. #include <sound/s3c24xx_uda134x.h>
   
2. #include <mach/gpio-fns.h>

    在LCD配置信息结构体后面开始增加声卡配置的结构体:

1. //uda1341 sound card driver
   
2. 
   
3. static struct s3c24xx_uda134x_platform_data s3c24xx_uda134x_data = {
   
4.         .l3_clk = S3C2410_GPB(4),
   
5.         .l3_data = S3C2410_GPB(3),
   
6.         .l3_mode = S3C2410_GPB(2),
   
7.         .model = UDA134X_UDA1341,
   
8. };
   
9. static struct platform_device s3c24xx_uda134x = {
   
10.         .name = "s3c24xx_uda134x",
    
11.         .dev = {
    
12.                 .platform_data = &s3c24xx_uda134x_data,
    
13.         }
    
14. };

    配置好后，把配置信息加入到平台中：

1. static struct platform_device *smdk2440_devices[] __initdata = {
   
2.         &s3c_device_usb,
   
3.         &s3c_device_lcd,
   
4.         &s3c_device_wdt,
   
5.         &s3c_device_i2c0,
   
6.         &s3c_device_iis,
   
7.         &s3c_device_rtc,
   
8.         &s3c24xx_uda134x, //uda
   
9. 
   
10. };

     到这里就基本上完成了配置，剩下的就是配置内核。

     3. 内核各相关项配置如下。

1. Device Drivers --->
   
2.     <*> Sound card support --->
   
3.         --- Sound card support
   
4.         <*> Advanced Linux Sound Architecture --->
   
5.             --- Advanced Linux Sound Architecture
   
6.             < > Sequencer support
   
7.             <*> OSS Mixer API
   
8.             <*> OSS PCM (digital audio) API
   
9.             [*] OSS PCM (digital audio) API - Include plugin system
   
10.             [ ] Dynamic device file minor numbers
    
11.             [*] Support old ALSA API
    
12.             [*] Verbose procfs contents
    
13.             [*] Verbose printk
    
14.             [ ] Debug
    
15.             [ ] Generic sound devices --->
    
16.             [ ] ARM sound devices --->
    
17.             [ ] SPI sound devices --->
    
18.             [*] USB sound devices --->
    
19.             <*> ALSA for SoC audio support --->
    
20.                 --- ALSA for SoC audio support
    
21.                 <*> SoC Audio for the Samsung S3C24XX chips
    
22.                 < > SoC AC97 Audio support for LN2440SBC - ALC650
    
23.                 <*> SoC I2S Audio support UDA134X wired to a S3C24XX
    
24.                 < > Build all ASoC CODEC drivers
    
25.         < > Open Sound System (DEPRECATED) --->

     4. 编译下载#make zImage。很奇怪的是好像这次配置并没有启动作用，有了LCD和RTC驱动移植的经验，我很快又找到了思路，那就是修改mach-smdk2410.c程序。

1. #vim arch/arm/mach-s3c2410/mach-smdk2410.c

    增加头两个用到的文件:

1. #include <sound/s3c24xx_uda134x.h>
   
2. #include <mach/gpio-fns.h>

    在LCD配置信息结构体后面开始增加声卡配置的结构体:

1. //uda1341 sound card driver
   
2. static struct s3c24xx_uda134x_platform_data s3c24xx_uda134x_data = {
   
3.         .l3_clk = S3C2410_GPB(4),
   
4.         .l3_data = S3C2410_GPB(3),
   
5.         .l3_mode = S3C2410_GPB(2),
   
6.         .model = UDA134X_UDA1341,
   
7. };
   
8. static struct platform_device s3c24xx_uda134x = {
   
9.         .name = "s3c24xx_uda134x",
   
10.         .dev = {
    
11.                 .platform_data = &s3c24xx_uda134x_data,
    
12.         }
    
13. };

    配置好后，把配置信息加入到平台中：

1. static struct platform_device *smdk2410_devices[] __initdata = {
   
2.         &s3c_device_usb,
   
3.         &s3c_device_lcd,
   
4.         &s3c_device_wdt,
   
5.         &s3c_device_i2c0,
   
6.         &s3c_device_iis,
   
7.         &s3c_device_rtc,
   
8.         &s3c24xx_uda134x, //uda
   
9. };

    编译后出现如下错误：

1. [skywalker@localhost linux-2.6.33]$ make zImage
   
2.   CHK include/linux/version.h
   
3.   CHK include/generated/utsrelease.h
   
4. make[1]: “include/generated/mach-types.h”是最新的。
   
5.   CALL scripts/checksyscalls.sh
   
6.   CHK include/generated/compile.h
   
7.   CC arch/arm/mach-s3c2410/mach-smdk2410.o
   
8. arch/arm/mach-s3c2410/mach-smdk2410.c:134: error: implicit declaration of function `S3C2410_GPB'
   
9. arch/arm/mach-s3c2410/mach-smdk2410.c:134: error: initializer element is not constant
   
10. arch/arm/mach-s3c2410/mach-smdk2410.c:134: error: (near initialization for `s3c24xx_uda134x_data.l3_clk')
    
11. arch/arm/mach-s3c2410/mach-smdk2410.c:135: error: initializer element is not constant
    
12. arch/arm/mach-s3c2410/mach-smdk2410.c:135: error: (near initialization for `s3c24xx_uda134x_data.l3_data')
    
13. arch/arm/mach-s3c2410/mach-smdk2410.c:136: error: initializer element is not constant
    
14. arch/arm/mach-s3c2410/mach-smdk2410.c:136: error: (near initialization for `s3c24xx_uda134x_data.l3_mode')
    
15. arch/arm/mach-s3c2410/mach-smdk2410.c:147: warning: 'smdk2440_devices' defined but not used
    
16. make[1]: *** [arch/arm/mach-s3c2410/mach-smdk2410.o] 错误 1
    
17. make: *** [arch/arm/mach-s3c2410] 错误 2

    被这几个错误弄得有点糊涂了，后来跟踪了一下代码，发现原来S3C2410_GPB这个宏是定义在mach/gpio-nrs.h头文件里的，于是乎增加了这个头文件，再编译，终于生成了内核映象文件。下载到开发板，从系统的启动信息可以看到声2440的I2S和uda已经关联起来了。

1. sbcore: registered new interface driver hiddev
   
2. usbcore: registered new interface driver usbhid
   
3. usbhid: USB HID core driver
   
4. No device for DAI UDA134X
   
5. No device for DAI s3c24xx-i2s
   
6. S3C24XX_UDA134X SoC Audio driver
   
7. UDA134X SoC Audio Codec
   
8. asoc: UDA134X <-> s3c24xx-i2s mapping ok
   
9. ALSA device list:
   
10.   #0: S3C24XX_UDA134X (UDA134X)

    5. 验证。先建立设备节点

1.  #mkdir /dev/sound
   
2.  #mknod /dev/sound/dsp c 14 4
   
3.  #cat /dev/sound/dsp > /tmp/test.wav
   
4.  ^c
   
5.  # ls -l tmp
   
6.  drwx------ 1 root root 2048 Jan 27 10:48 qtembedded-0
   
7.  drwx------ 1 root root 2048 Jan 27 10:48 qtopia-0
   
8.  -rw-r--r-- 1 root root 49152 Jan 27 10:43 test.wav
   
9.  # cat /tmp/test/wav > /dev/sound/dsp
   
10.  #

 ok，声卡驱动大功告成。

 

 

2011-01-27