1. 下载最新的内核源码linux-2.6.31,位置:ftp://ftp.kernel.org/pub/linux/kernel/v2.6
2. 下载yaffs2文件系统源码,下载地址:
3. 修改根目录下的Makefile文件:
ARCH ?= arm
CROSS_COMPILE ?= arm-linux-
4. arch/arm/plat-s3c24xx/common-smdk.c文件:
分区结构改为:static struct mtd_partition smdk_default_nand_part[] = {
[0] = {
.name = "supervivi",
.size = 0x00030000,
.offset = 0,
},
[1] = {
.name = "Kernel",
.offset = 0x00050000,
.size = 0x00200000,
},
[2] = {
.name = "root",
.offset = 0x00250000,
.size = 0x03dac000,
}
};
这样分区只是为了和FriendlyARM保持一致,并不是必须。
去掉此文件中相关的led相关设备和驱动,在smdk_devs结构体中增加&s3c_device_usbgadget设备,以支持USB网卡设备,否则usb网卡不可使用。
5. 修改晶振为12000000,位置:arch/arm/mach-s3c2440/mach-smdk2440.c
6. 增加yaffs2文件系统,解压后进入yaffs2文件目录,执行./patch-ker.sh c /home/crazytyt/linux-2.6.31/
7. 修改include/asm/mach-types.h中的MACH_TYPE_S3C2440的值为782,主要是为了与supervivi中的设置一样,也可以修改supervivi为362。 注意此文件系编译后生成,刚开始没有。
8. 增加 DM9000网卡的驱动程序,步骤如下:
-------------A-------------
arch/arm/mach-s3c2440/mach-smdk2440.c文件中:
在static struct platform_device *smdk2440_devices[] __initdata = {
&s3c_device_wdt,
&s3c_device_i2c,
&s3c_device_iis,
添加
&s3c_device_dm9000,
&s3c_device_rtc, //增加rtc初始化
--------------- A END ---------------
---------------B ------------------
在arch/arm/plat-s3c24xx/devs.c中,
#include
#include
后面添加
/* DM9000 registrations */
#include
#define DM9000_BASE 0x20000300
static struct resource s3c_dm9000_resource[] = {
[0] = {
.start = DM9000_BASE,
.end = DM9000_BASE + 0x03,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = DM9000_BASE + 0x04,
.end = DM9000_BASE + 0x04 + 0x7c,
.flags = IORESOURCE_MEM,
},
[2] = {
.start = IRQ_EINT7,
.end = IRQ_EINT7,
.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHLEVEL,
}
};
static struct dm9000_plat_data s3c_device_dm9000_platdata = {
.flags = DM9000_PLATF_16BITONLY | DM9000_PLATF_NO_EEPROM,
};
struct platform_device s3c_device_dm9000 = {
.name= "dm9000",
.id= 0,
.num_resources= ARRAY_SIZE(s3c_dm9000_resource),
.resource= s3c_dm9000_resource,
.dev= {
.platform_data = &s3c_device_dm9000_platdata,
}
};
EXPORT_SYMBOL(s3c_device_dm9000);
--------------- B END -----------------------
----------------------------C -------------------------
在linux-2.6.29.4arch/arm/plat-s3c24xx/include/plat/include/devs.h
extern struct s3c24xx_uart_resources s3c2410_uart_resources[];
后面添加:
extern struct platform_device s3c_device_dm9000;
--------------------------------------- C END ------------------------------
------------------------------- D ----------------------------------
修改drivers/net/dm9000.c
添加37行
#include
#include "dm9000.h" 后面添加:
#include
#include // important for s3c2410_gpio_cfgpin...
#include
#include
#include
#include
#include
#define DM9000_IRQ IRQ_EINT7
------------------ END D ---------------
------------------- E -----------------
dm9000_probe函数中
int i;
u32 id_val;
后面添加:
unsigned int value;
//config the bwscon for bank 4
value = __raw_readl(S3C2410_BWSCON);
value &= ~(S3C2410_BWSCON_WS4|
S3C2410_BWSCON_ST4|
S3C2410_BWSCON_DW4_32);
value |= (S3C2410_BWSCON_ST4|
S3C2410_BWSCON_DW4_16);
__raw_writel(value, S3C2410_BWSCON);
//config the bankcon4
value = 0;
value = (S3C2410_BANKCON_Tacs4|
S3C2410_BANKCON_Tcos4|
S3C2410_BANKCON_Tacc14|
S3C2410_BANKCON_Tcoh4|
S3C2410_BANKCON_Tcah4|
S3C2410_BANKCON_Tacp6|
S3C2410_BANKCON_PMCnorm);
__raw_writel(value,S3C2410_BANKCON4);
//config the irq pin (for mini2440)
set_irq_type(DM9000_IRQ,IRQ_TYPE_LEVEL_HIGH);
s3c2410_gpio_cfgpin(S3C2410_GPF7, S3C2410_GPF7_EINT7);
s3c2410_gpio_pullup(S3C2410_GPF7, 0);
-------------- E END-----------------------------
-------------------------- F ----------------------------------
dm9000.c文件中,dm9000_probe函数里,增加 设置MAC地址的代码
在db->mii.mdio_write = dm9000_phy_write后面,用下面代码代替原来else部分的代码
#if defined(CONFIG_ARCH_S3C2410)
printk("Now use the default MAC address: 08:90:90:90:90:90\n");
mac_src = "byd2440";
ndev->dev_addr[0] = 0x08;
ndev->dev_addr[1] = 0x90;
ndev->dev_addr[2] = 0x90;
ndev->dev_addr[3] = 0x90;
ndev->dev_addr[4] = 0x90;
ndev->dev_addr[5] = 0x90;
#else
mac_src = "eeprom";
/* try reading the node address from the attached EEPROM */
for (i = 0; i < 6; i += 2)
dm9000_read_eeprom(db, i / 2, ndev->dev_addr+i);
if (!is_valid_ether_addr(ndev->dev_addr) && pdata != NULL) {
mac_src = "platform data";
memcpy(ndev->dev_addr, pdata->dev_addr, 6);
}
if (!is_valid_ether_addr(ndev->dev_addr)) {
/* try reading from mac */
mac_src = "chip";
for (i = 0; i < 6; i++)
ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
}
if (!is_valid_ether_addr(ndev->dev_addr))
dev_warn(db->dev, "%s: Invalid ethernet MAC address. Please "
"set using ifconfig\n", ndev->name);
#endif
------------------------------ F END -------------------------
所有dm9000驱动添加完毕
9. 2.6.31增加了MINI2440开发板支持,如果选中这个开发板类型将出现CONFIG_EEPROM_AT24选项,导致编译不过,要去掉此选项
10. 2.6.31版的arch/arm/mach-s3c2410/include/mach/regs-gpio.h与以前版本有较大变化,很多常量未定义,需要自己定义。
11. USB设备口要在bootloader中打开,并做初步初始化,否则linux启动后无法识别usb网卡。
12. 在driver/usb/gadget/s3c2410_udc.c中的s3c2410_udc_enable的最后一句前加上打开USB设备口的代码,如不需要用USB设备,则无需此操作。代码为:
s3c2410_gpio_cfgpin(S3C2410_GPC5, S3C2410_GPC5_OUTP);
s3c2410_gpio_setpin(S3C2410_GPC5, 1);
13. 增加LCD显示驱动部分:
在文件arch/arm/mach-s3c2440/mach-smdk2440.c中,增加LCD相关结构体:
#define LCD_WIDTH 800
#define LCD_HEIGHT 480
#define LCD_PIXCLOCK 40000
#define LCD_RIGHT_MARGIN 67
#define LCD_LEFT_MARGIN 40
#define LCD_HSYNC_LEN 31
#define LCD_UPPER_MARGIN 25
#define LCD_LOWER_MARGIN 5
#define LCD_VSYNC_LEN 1
static struct s3c2410fb_display mini2440_lcd_cfg __initdata = {
#if !defined (LCD_CON5)
.lcdcon5 = S3C2410_LCDCON5_FRM565 |
S3C2410_LCDCON5_INVVLINE |
S3C2410_LCDCON5_INVVFRAME |
S3C2410_LCDCON5_PWREN |
S3C2410_LCDCON5_HWSWP,
#else
.lcdcon5 = LCD_CON5,
#endif
.type = S3C2410_LCDCON1_TFT,
.width = LCD_WIDTH,
.height = LCD_HEIGHT,
.pixclock = LCD_PIXCLOCK,
.xres = LCD_WIDTH,
.yres = LCD_HEIGHT,
.bpp = 16,
.left_margin = LCD_LEFT_MARGIN + 1,
.right_margin = LCD_RIGHT_MARGIN + 1,
.hsync_len = LCD_HSYNC_LEN + 1,
.upper_margin = LCD_UPPER_MARGIN + 1,
.lower_margin = LCD_LOWER_MARGIN + 1,
.vsync_len = LCD_VSYNC_LEN + 1,
};
static struct s3c2410fb_mach_info mini2440_fb_info __initdata = {
.displays = &mini2440_lcd_cfg,
.num_displays = 1,
.default_display = 0,
.gpccon = 0xaa955699,
.gpccon_mask = 0xffc003cc,
.gpcup = 0x0000ffff,
.gpcup_mask = 0xffffffff,
.gpdcon = 0xaa95aaa1,
.gpdcon_mask = 0xffc0fff0,
.gpdup = 0x0000faff,
.gpdup_mask = 0xffffffff,
.lpcsel = 0xf82,
};
我的显示屏为800×480的,FriendlyARM开发板自带。
14. 增加触摸屏支持,从开发板自带的内核文中复制s3c2410_ts.c文件至driver/input/touchscreen下,由于触摸屏需要adc的支持,还需要复制mini2440_adc.c s3c244xx-adc.h至driver/char/目录下,并相应修改Makerfile和Kconfig文件
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