道客优

Linux 3.3.5系统移植

Linux 3.3.5系统移植

1. 将arch/arm/mach-s3c6410/下的,mach-smdk6410.c cp为mach-my6410.c;

2. 打开arch/arm/mach-s3c6410/下的Kconfig，仿照MACH_SMDK6410做一个菜单项：

config MACH_MY6410

bool "MY6410"

select CPU_S3C6410

select SAMSUNG_DEV_ADC

select S3C_DEV_HSMMC

select S3C_DEV_HSMMC1

select S3C_DEV_I2C1

select SAMSUNG_DEV_IDE

select S3C_DEV_FB

select S3C_DEV_RTC

select SAMSUNG_DEV_TS

select S3C_DEV_USB_HOST

select S3C_DEV_USB_HSOTG

select S3C_DEV_WDT

select SAMSUNG_DEV_BACKLIGHT

select SAMSUNG_DEV_KEYPAD

select SAMSUNG_DEV_PWM

select HAVE_S3C2410_WATCHDOG if WATCHDOG

select S3C64XX_SETUP_SDHCI

select S3C64XX_SETUP_I2C1

select S3C64XX_SETUP_IDE

select S3C64XX_SETUP_FB_24BPP

select S3C64XX_SETUP_KEYPAD

help

Machine support for the Pillar MY6410

3. 打开arch/arm/tools/mach-types文件，这里面存的是机器ID必须要和uboot里面的ID保持一致，将其283行复制添加在后面并修改为：

smdk6410 MACH_SMDK6410 SMDK6410 1626

xx6410 MACH_XX6410 XX6410 1626这个机器ID和UBOOT里的机器ID相同时才能启动内核；

1. 修改BSP文件mach-my6410.c,内容如下：

将mach-mach-my6410.c文件中的所有smdk6410改成my6410(不要改大写SMDK6410的)

MACHINE_START(MY6410, "MY6410")//这个要和Kconfig里的MACH-MY6410匹配

2. 在当前目录的Makefile最后一行加上 obj-$(CONFIG_MACH_MY6410) += mach-my6410.o

3. 修改顶层的Makefile：

ARCH ?= arm

CROSS_COMPILE ?= /usr/local/arm/4.2.2-eabi/usr/bin/arm-linux-

4. 复制arch/arm/configs/下的s3c6400-defconfig文件，然后将其保存为.config,配置内核支持EABI，再选中XX6410 board这一项，保存退出；

5. 执行make menuconfig对内核进行配置：

执行make编译

执行make zImage生成zImage

将uboot根目录下的mkimage拷贝到/user/bin目录下

执行make uImage生成uImage

通过以上几步linux内核移植完了，剩下就移植驱动了。

这里需要注意，每一次修改Kconfig文件都需要make menuconfig对内核进行配置。

LED驱动移植

1. Linu内核下drivers/leds/ledsgpio.c实现了一个体系结构无关的GPIO LED驱动，使用此LED 驱动，开发者不需要修改一行代码，只需要在 BSP 的板文件（对于OK6410 为arch/arm/machs3c6410/machmy6410.c）中定义相关的platform设备和数据。在 MY6410开发板上,GPM0~GPM3 实现了四个 LED，因此其对应的platform 信息如下：

arch/arm/machs3c6410/machmy6410.c:

static struct gpio_led my6410_leds[] ={

[0]= {

.name = "LED1",

.gpio = S3C64XX_GPM(0),

[1]= {

.name = "LED2",

.gpio = S3C64XX_GPM(1),

[2]= {

.name = "LED3",

.gpio = S3C64XX_GPM(2),

[3]= {

.name = "LED4",

.gpio = S3C64XX_GPM(3),

};

static struct gpio_led_platform_data my6410_gpio_led_pdata ={

.num_leds =ARRAY_SIZE(my6410_leds),

.leds =my6410_leds,

};

static struct platform_device my6410_device_led ={

.name ="leds-gpio",

.id =-1,

.dev ={

.platform_data = &my6410_gpio_led_pdata,

};

2. 将&my6410_device_led添加到static struct platform_device *my6410_devices[] __initdata中。

3. 配置内核：

Device Drivers --->

[*] LED Support --->

<*> LED Support forGPIO connected LEDs

下载内核后开发板上的四个LED这时候已经全部都亮了

按键驱动移植

1. Linux内核下的drivers/input/keyboard/gpio_keys.c 实现了一个体系结构无关的 GPIO 按键驱动,使用此按键驱动,开发者不需要修改一行代码，只需要在BSP 的板文件（对于 MY6410为arch/arm/machs3c6410/machmy6410.c）中定义相关的platform 设备和数据。在 MY6410开发板上,用 GPN0~GPN5实现了DOWN、ENTER、HOME、UP、TAB、END 六个按键，因此其对应的 platform 信息如下：

arch/arm/machs3c6410/machmy6410.c:

static struct gpio_keys_button my6410_buttons[] = {

{

.gpio =S3C64XX_GPN(0),

.code =KEY_UP,

.desc ="Up",

.active_low =1,

.wakeup =0,

{

.gpio =S3C64XX_GPN(1),

.code =KEY_DOWN,

.desc ="Down",

.active_low =1,

.wakeup =0,

{

.gpio =S3C64XX_GPN(2),

.code =KEY_LEFT,

.desc ="Left",

.active_low =1,

.wakeup =0,

{

.gpio =S3C64XX_GPN(3),

.code =KEY_RIGHT,

.desc ="Right",

.active_low =1,

.wakeup =0,

{

.gpio =S3C64XX_GPN(4),

.code =KEY_ENTER,

.desc ="Enter",

.active_low =1,

.wakeup =0,

{

.gpio =S3C64XX_GPN(5),

.code =KEY_ESC,

.desc ="Esc",

.active_low =1,

.wakeup =0,

}

};

static struct gpio_keys_platform_data my6410_button_data ={

.buttons =my6410_buttons,

.nbuttons =ARRAY_SIZE(my6410_buttons),

};

static struct platform_devicemy6410_device_button = {

.name ="gpio-keys",

.id =-1,

.dev ={

.platform_data =&my6410_button_data,

};

2. 将&my6410_device_button添加到static structplatform_device *my6410_devices[] __initdata中

3. 配置linux内核

Device Drivers --->

Input device support --->

[*] Keyboards --->

<*> GPIO Buttons

在移植按键驱动时候可能出现一下错误：

arch/arm/mach-s3c64xx/mach-my6410.c:298: error: array type has incompleteelement type

arch/arm/mach-s3c64xx/mach-my6410.c:300: error: field name not in recordor union initializer

arch/arm/mach-s3c64xx/mach-my6410.c:300: error: (near initialization for'my6410_buttons')

arch/arm/mach-s3c64xx/mach-my6410.c:301: error: field name not in recordor union initializer

arch/arm/mach-s3c64xx/mach-my6410.c:301: error: (near initialization for'my6410_buttons')

arch/arm/mach-s3c64xx/mach-my6410.c:302: error: field name not in recordor union initializer

arch/arm/mach-s3c64xx/mach-my6410.c:302: error: (near initialization for'my6410_buttons')

arch/arm/mach-s3c64xx/mach-my6410.c:303: error: field name not in recordor union initializer

arch/arm/mach-s3c64xx/mach-my6410.c:303: error: (near initialization for'my6410_buttons')

arch/arm/mach-s3c64xx/mach-my6410.c:304: error: field name not in recordor union initialize

………………..

………………………

……………………………………

可以看出这个错误提示的意思是没有找到定义的数组，然后其他的就引起一连串的错误，解决的办法很简单就是把

#include

这个头文件添加进去就可以了。

今天已经就做这么多吧，人都快累垮了。。。。。。明天继续。。。。。。

LCD驱动移植

1. 向mach-my6410.c里面填入相应的平台信息：

static struct s3c_fb_pd_win my6410_fb_win0 = {

/* this is to ensure we use win0 */

.win_mode = {

.left_margin =2,

.right_margin =2,

.upper_margin =2,

.lower_margin =2,

.hsync_len =41,

.vsync_len =10,

.xres =480,

.yres =272,

.max_bpp = 32,

.default_bpp = 16,

};

pixclock = 1000000 / DCLK = 1000000 / 9 = 111111

left_margin = Thb = 2

right_margin = Thf = 2

hsync_len = Thp = 41

upper_margin = Tvb = 2

lower_margin = Tvf = 2

vsync_len = Tvp = 10

xres = Thd = 480

Yres = Tvd = 272

static struct map_desc my6410_iodesc[] ={

{

/*LCD support */

.virtual= (unsigned long)S3C_VA_LCD,

.pfn= __phys_to_pfn(S3C_PA_FB),

.length= SZ_16K,

.type= MT_DEVICE,

};

1. 然后将28内核中的drviers/video/samsung拷贝到drviers/video/目录下

2. 修改drviers/video/的Kconfig文件，在文件中加入

source "drivers/video/samsung/Kconfig"

3. 修改修改drviers/video/的Makefie文件,再最后一行添加：

obj-$(CONFIG_FB_S3C_EXT) += samsung/

4. 在arch/arm/plat-samsung/include/plat/map-base.h里面添加

#define S3C_VA_LCD S3C_ADDR(0x01100000) /* LCD */

1. 在include/generated/atuoconfig.h里面添加

#define CONFIG_FB_S3C_EXT_NUM 4

2. 把drivers/video/samsung/s3cfb_fimd4x.c里面的

第1417行：

s3c6410_pm_do_save(s3c_lcd_save,ARRAY_SIZE(s3c_lcd_save));

改成

s3c_pm_do_save(s3c_lcd_save,ARRAY_SIZE(s3c_lcd_save));

第1438行

s3c6410_pm_do_restore(s3c_lcd_save,ARRAY_SIZE(s3c_lcd_save));

改成

s3c_pm_do_restore(s3c_lcd_save,ARRAY_SIZE(s3c_lcd_save));

1. 配置内核：

Device Drivers --->

Graphics support --->

<*> Support for frame bufferdevices ---> （里面的都空选）

<*> Support for frame bufferdevices --->

[ ] Backlight & LCD device support--->

<*> S3C Framebuffer Support(eXtended)（修改Kconfig之后才有这个选）

Select LCD Type (4.3 inch 480x272 TFTLCD) --->

(X) 4.3 inch 480x272 TFT LCD

<*> Advanced options for S3CFramebuffer

Select BPP(Bits Per Pixel) (16 BPP)--->

(4) Number of Framebuffers

[ ] Enable Virtual Screen

[*] Enable Double Buffering

Console display driver support --->

<*> Framebuffer Console support

[*] Bootup logo --->（显示小企鹅）

[*] Standard 224-color Linux logo

如果驱动移植成功内核启动的时候会打印一下信息：

S3C_LCD clock got enabled :: 133.000 Mhz

LCD TYPE :: LTE480WV will be initialized

Window[0] - FB1: map_video_memory: clearffd80000:0007f800

FB1: map_video_memory: dma=5f900000cpu=ffd80000 size=0007f800

Window[0] - FB2: map_video_memory: clearffdbfc00:0003fc00

FB2: map_video_memory: dma=5f93fc00cpu=ffdbfc00 size=0003fc00

Console: switching to colour framebuffer device 60x34

fb0: s3cfb frame buffer device

Window[1] - FB1: map_video_memory: clearffd00000:0007f800

FB1: map_video_memory: dma=5f980000cpu=ffd00000 size=0007f800

Window[1] - FB2: map_video_memory: clearffd3fc00:0003fc00

FB2: map_video_memory: dma=5f9bfc00cpu=ffd3fc00 size=0003fc00

fb1: s3cfb frame buffer device

Window[2] - FB1: map_video_memory: clearffcc0000:0003fc00

FB1: map_video_memory: dma=5fa00000cpu=ffcc0000 size=0003fc00

fb2: s3cfb frame buffer device

Window[3] - FB1: map_video_memory: clearffc80000:0003fc00

FB1: map_video_memory: dma=5fa40000cpu=ffc80000 size=0003fc00

fb3: s3cfb frame buffer device

在LCD还会显示小企鹅：

相应的驱动程序都在

drviers/video/Samsung/s3cfb.c目录下

今天就为这驱动搞了一天，其实早就可以成功的，TMMD的不知道是不是手贱还是怎么的，

竟然把System Type--->

[* ] SMDK6400

选上了，最后系统一直打印都是SMDK6400的信息。幸好我靠

printk(KERN_INFO"DEBUG\n\n\n\n");

找到了原因。

以后有时间好好对LCD驱动做一下分析。

DM9000网卡驱动移植

1. Linux内核里面已经支持了dm9000的网卡驱动，所以驱动程序我们不需要写了，只需要添加相应的平台信息。在linux-3.3.5/arch/arm/mach-s3c64xx/mach-my6410.c里面添加都文件#include

2. 在linux-3.3.5/arch/arm/mach-s3c64xx/mach-my6410.c里面添加以下平台信息：

#define S3C64XX_PA_DM9000 (0x18000000)

#define S3C64XX_SZ_DM9000 SZ_1M

static struct resource my6410_dm9000_resources[] = {

[0] = {

.start= S3C64XX_PA_DM9000,

.end= S3C64XX_PA_DM9000 + 3,

.flags= IORESOURCE_MEM,

[1] = {

.start= S3C64XX_PA_DM9000 + 4,

.end= S3C64XX_PA_DM9000 + S3C64XX_SZ_DM9000 - 1,

.flags= IORESOURCE_MEM,

[2] = {

.start= IRQ_EINT(7),

.end= IRQ_EINT(7),

.flags= IORESOURCE_IRQ | IRQF_TRIGGER_HIGH,

};

static struct dm9000_plat_datamy6410_dm9000_platdata = {

.flags= DM9000_PLATF_16BITONLY,

.dev_addr= { 0x08, 0x90, 0x00, 0xa0,0x90, 0x90 },

};

static struct platform_devicemy6410_device_dm9000 = {

.name= "dm9000",

.id= 0,

.num_resources=ARRAY_SIZE(my6410_dm9000_resources),

.resource= my6410_dm9000_resources,

.dev= {

.platform_data = &my6410_dm9000_platdata,

}

};

然后在static structplatform_device *my6410_devices[] __initdata =里面添加

&my6410_device_dm9000,

1. 配置内核，这里网络配置的选项很多，但都要根据实际选对：

1. 出现的问题及解决方案：

1. 编译的时候出现：

SYSMAP System.map

SYSMAP .tmp_System.map

Inconsistent kallsyms data

This is a bug - please report about it

Try make KALLSYMS_EXTRA_PASS=1 as a workaround

make: *** [vmlinux] 错误 1

这样的错误没有任何提示，经过总结，我发现这样的错误出现的原因就是内核中有些设备没有配置但是在BSP里面却定义了，或者是 BSP里面定义了，但是内核没有配置。

解决方法是把static structplatform_device *my6410_devices[] __initdata里面一些三星的东西去掉，其实如果从一个空模版移植是不会出现这类问题的，这里我还是有些偷懒。修改以后的内容如下：

static struct platform_device*my6410_devices[] __initdata = {

#ifdef CONFIG_SMDK6410_SD_CH0

&s3c_device_hsmmc0,

#endif

&my6410_device_button,

&my6410_device_led,

&my6410_device_dm9000,

#ifdef CONFIG_SMDK6410_SD_CH1

&s3c_device_hsmmc1,

#endif

&s3c_device_i2c0,

//&s3c_device_i2c1,

&s3c_device_fb,

&s3c_device_ohci,

&s3c_device_usb_hsotg,

&samsung_asoc_dma,

//&s3c64xx_device_iisv4,

//&samsung_device_keypad,

#ifdef CONFIG_REGULATOR

//&my6410_b_pwr_5v,

#endif

//&my6410_lcd_powerdev,

//&my6410_smsc911x,

//&s3c_device_adc,

//&s3c_device_cfcon,

&s3c_device_rtc,

&s3c_device_ts,

//&s3c_device_wdt,

};

1. 启动过程中出现这样的问题：

smsc911x: failed to claim resource 0（这个提示原来在这儿我怎么没有发现）

------------[ cut here ]------------

WARNING: at drivers/base/core.c:194device_release+0x74/0x80()

Device 'platform-lcd.0' does not have arelease() function, it is broken and must be fixed.

Modules linked in:

[](unwind_backtrace+0x0/0xf8) from [](warn_slowpath_common+0x4c/0x64)

[](warn_slowpath_common+0x4c/0x64) from [](warn_slowpath_fmt+0x30/0x40)

[](warn_slowpath_fmt+0x30/0x40) from [](device_release+0x74/0x80)

[](device_release+0x74/0x80) from [] (kobject_release+0x44/0x78)

[](kobject_release+0x44/0x78) from [](platform_add_devices+0x54/0x68)

[](platform_add_devices+0x54/0x68) from [](customize_machine+0x20/0x30)

[](customize_machine+0x20/0x30) from [](do_one_initcall+0x11c/0x170)

[](do_one_initcall+0x11c/0x170) from [] (kernel_init+0x84/0x128)

[](kernel_init+0x84/0x128) from [] (kernel_thread_exit+0x0/0x8)

---[ end trace 1b75b31a2719ed1c ]---

------------[ cut here ]------------

WARNING: at drivers/base/core.c:194device_release+0x74/0x80()

Device 'samsung-keypad' does not have arelease() function, it is broken and must be fixed.