TQ2440 Linux 系统移植

 

一、u-boot基本常用命令
1. 基本环境设置
setenv serverip 192.168.1.115
setenv ipaddr  192.168.1.211
setenv gatewayip 192.168.1.1
setenv ethaddr 1E:23:37:48:5A:6B

setenv bootargs root=/dev/mtdblock2 rootfstype=yaffs init=/linuxrc mem=64M console=ttySAC0,115200

setenv bootcmd nand read 30008000 80000 200000 /; bootm

saveenv

2. 烧写Boot
tftp 30008000 u-boot-tq.bin
nand erase 0 60000
nand write 30008000 0 60000 

3. 加载内核
tftp 30008000 zImage.img
bootm

4. 烧写rootfs
(1)如果是256MB的Nand Flash，使用如下命令烧写：   
   tftp 30008000 root_tq2440.yaffs2
   nand erase 480000 FB60000
   nand write.yaffs 30008000 480000 $(filesize) 

(2)如果是64MB的Nand Flash，使用如下命令烧写：   
   tftp 30008000 root_tq2440.yaffs2
   nand erase 480000 3B60000
   nand write.yaffs 30008000 480000 $(filesize) 

5.  烧写内核

tftp 30008000 zImage.img
nand erase 80000 400000
nand write 30008000 80000 200000

6. 使用nfs配置:

setenv bootargs root=nfs nfsroot=192.168.1.115:/source/rootfs ip=192.168.1.211 console=ttySAC0,115200 init=/linuxrc mem=64M

二、Linux 2.6.32.10在tq2440开发板上的移植

明确相关板级配置:
(1) CPU -- s3c2440, 外部晶振12M
(2) SDRAM -- 64MB
(3) Nand Flash -- 64MB[K9F1208] 或 256MB[K9F2G08]
(4) 网卡 -- DM9000, 映射在BANK4

 
0. 外部晶振频率修改
static void __init smdk2440_map_io(void)
{
        s3c24xx_init_io(smdk2440_iodesc, ARRAY_SIZE(smdk2440_iodesc));
        s3c24xx_init_clocks(16934400);
        s3c24xx_init_uarts(smdk2440_uartcfgs, ARRAY_SIZE(smdk2440_uartcfgs));
}

=》

static void __init smdk2440_map_io(void)
{
        s3c24xx_init_io(smdk2440_iodesc, ARRAY_SIZE(smdk2440_iodesc));
        s3c24xx_init_clocks(12000000);  //修改为12M
        s3c24xx_init_uarts(smdk2440_uartcfgs, ARRAY_SIZE(smdk2440_uartcfgs));
}

1.修改nand flash分区:
arch/arm/plat-s3c24xx/common-smdk.c

(1)如果是256MB的Nand,按如下修改 [256MB -- 0x10000000]

/* NAND parititon from 2.4.18-swl5 */
static struct mtd_partition smdk_default_nand_part[] = {
        [0] = {
                .name   = "BootLoader",
                .size   = 0x00060000,   /* 3 Blocks -- 384K*/
                .offset = 0,
        },
        [1] = {
                .name   = "Kernel",
                .size   = 0x00400000,   /* 32 Blocks -- 4MB */
                .offset = 0x00080000,
        },
        [2] = {
                .name   = "Rootfs",
                .size   = 0x0FB80000,   /* 251MB + 512KB*/
                .offset = 0x00480000,
        }
};

如果是256MB的Nand，使用uboot擦出分区命令如下：
//Erase Kernel Partition
nand erase 80000 400000

//Erase Rootfs Partition
nand erase 480000 FB80000

(2) 如果是64MB的Nand,按如下修改 [64MB -- 0x4000000]

/* NAND parititon from 2.4.18-swl5 */
static struct mtd_partition smdk_default_nand_part[] = {
        [0] = {
                .name   = "BootLoader",
                .size   = 0x00060000,   /* 24 Blocks -- 384K*/
                .offset = 0,
        },
        [1] = {
                .name   = "Kernel",
                .size   = 0x00400000,   /* 256 Blocks -- 4MB */
                .offset = 0x00080000,
        },
        [2] = {
                .name   = "Rootfs",
                .size   = 0x03B80000,   /* 59MB + 512KB*/
                .offset = 0x00480000,
        }
};

如果是64MB的Nand，使用uboot擦出分区命令如下：
//Erase Kernel Partition
nand erase 80000 400000

//Erase Rootfs Partition
nand erase 480000 3B80000

2. yaffs2补丁：

./patch-ker.sh c ../linux-2.6.32.10

3. DM9000网络驱动移植
(1)
arch/arm/mach-s3c2440/mach-smdk2440.c
增加

#include <linux/dm9000.h>

/* DM9000 */
static struct resource s3c_dm9k_resource[] = {
    [0] = {
        .start = S3C2410_CS4,
        .end = S3C2410_CS4 + 3,
        .flags = IORESOURCE_MEM,
    },
    [1] = {
        .start = S3C2410_CS4 + 4,
        .end = S3C2410_CS4 + 4 + 3,
        .flags = IORESOURCE_MEM,
    },
    [2] = {
        .start = IRQ_EINT7,
        .end = IRQ_EINT7,
        .flags = IORESOURCE_IRQ | IRQF_TRIGGER_RISING,
    }

};

static struct dm9000_plat_data s3c_dm9k_platdata = {
    .flags = DM9000_PLATF_16BITONLY,
};

struct platform_device s3c_device_dm9000 = {
    .name  = "dm9000",
    .id   = 0,
    .num_resources = ARRAY_SIZE(s3c_dm9k_resource),
    .resource  = s3c_dm9k_resource,
    .dev   = {
        .platform_data = &s3c_dm9k_platdata,
    }
};

(2)
static struct platform_device *smdk2440_devices[] __initdata = {
        &s3c_device_usb,
        &s3c_device_lcd,
        &s3c_device_wdt,
        &s3c_device_i2c0,
        &s3c_device_iis,
#ifdef CONFIG_DM9000
        &s3c_device_dm9000,
#endif
};

4. USB MassStorage 驱动移植

配置

mount -t vfat /dev/sda1 /mnt/udisk

umount /mnt/udisk
或
umount /dev/sda1

mount -t vfat -o iocharset=cp936 /dev/sda1 /mnt/udisk

5. SD卡
(1)arch/arm/mach-s3c2440/mach-smdk2440.c

增加头文件：

#include <plat/mci.h>

/* MMC/SD */
static struct s3c24xx_mci_pdata tq2440_mci_pdata = {
        .gpio_detect    = S3C2410_GPG(8),
};

static struct platform_device *smdk2440_devices[] __initdata = {
        &s3c_device_usb,
        &s3c_device_lcd,
        &s3c_device_wdt,
        &s3c_device_i2c0,
        &s3c_device_iis,
#ifdef CONFIG_DM9000
        &s3c_device_dm9000,
#endif
 &s3c_device_sdi,
};

static void __init smdk2440_machine_init(void)
{
        s3c24xx_fb_set_platdata(&smdk2440_fb_info);
        s3c_i2c0_set_platdata(NULL);

        platform_add_devices(smdk2440_devices, ARRAY_SIZE(smdk2440_devices));
        smdk_machine_init();

 //Added for SDI
 s3c_device_sdi.dev.platform_data = &tq2440_mci_pdata;     
}

(2)drivers/mmc/core/sd.c
在函数mmc_sd_init_card() 函数中，在调用 mmc_read_switch(card) 函数前加上10ms的延时，即加入下面的一句：
mdelay(10);

 /*
  * Fetch switch information from card.
  */

   err = mmc_read_switch(card);
   if (err)
       goto free_card;

=》

 /*
  * Fetch switch information from card.
  */
   mdelay(10); //Added by fengyong  
   err = mmc_read_switch(card);
   if (err)
       goto free_card;

6. LCD驱动移植
arch/arm/mach-s3c2440/mach-smdk2440.c

/* LCD driver info */
static struct s3c2410fb_display smdk2440_lcd_cfg __initdata = {

        .lcdcon5        = S3C2410_LCDCON5_FRM565 |
                          S3C2410_LCDCON5_INVVLINE |
                          S3C2410_LCDCON5_INVVFRAME |
                          S3C2410_LCDCON5_PWREN |
                          S3C2410_LCDCON5_HWSWP,

        .type           = S3C2410_LCDCON1_TFT,

        .width          = 240,
        .height         = 320,

        .pixclock       = 166667, /* HCLK 60 MHz, divisor 10 */
        .xres           = 240,
        .yres           = 320,
        .bpp            = 16,
        .left_margin    = 20,
        .right_margin   = 8,
        .hsync_len      = 4,
        .upper_margin   = 8,
        .lower_margin   = 7,
        .vsync_len      = 4,
};

=>

static struct s3c2410fb_display smdk2440_lcd_cfg __initdata = {

        .lcdcon5        = S3C2410_LCDCON5_FRM565 |
                          S3C2410_LCDCON5_INVVLINE |
                          S3C2410_LCDCON5_INVVFRAME |
                          S3C2410_LCDCON5_PWREN |
                          S3C2410_LCDCON5_HWSWP,

        .type           = S3C2410_LCDCON1_TFT,

        .width          = 320,
        .height         = 240,

        .pixclock       = 80000, /* HCLK 100 MHz, divisor 3 */
        .xres           = 320,
        .yres           = 240,
        .bpp            = 16,

        .left_margin      = 28, /* for HFPD*/
        .right_margin     = 24, /* for HBPD*/
        .hsync_len        = 42, /* for HSPW*/
        .upper_margin     = 6,  /* for VBPD*/
        .lower_margin     = 2,  /* for VFPD*/
        .vsync_len        = 12, /* for VSPW*/
};

static struct s3c2410fb_mach_info smdk2440_fb_info __initdata = {
        .displays       = &smdk2440_lcd_cfg,
        .num_displays   = 1,
        .default_display = 0,
#if 0
        /* currently setup by downloader */
        .gpccon         = 0xaaaaaaaa,
        .gpccon_mask    = 0xffffffff,
        .gpcup          = 0xffffffff,
        .gpcup_mask     = 0xffffffff,
        .gpdcon         = 0xaaaaaaaa,
        .gpdcon_mask    = 0xffffffff,
        .gpdup          = 0xffffffff,
        .gpdup_mask     = 0xffffffff,
#endif
};

   7. rootfs

烧写制作3种文件系统:

crmafs:
   ./mkfs.cramfs rootfs rootfs.cramfs //制作crmafs映像  

   tftp 30008000 rootfs.cramfs
   nand erase 480000 3B60000
   nand write.yaffs 30008000 480000 $(filesize) 

   setenv bootargs root=/dev/mtdblock2 rootfstype=cramfs init=/linuxrc mem=64M console=ttySAC0,115200
   saveenv

jffs2:
   ./mkfs.jffs2 -r ./rootfs -o rootfs.jffs2 -e 0x4000 --pad=0x800000 -n //制作jffs2映像
 
   tftp 30008000 rootfs.jffs2
   nand erase 480000 3B60000
   nand write.yaffs 30008000 480000 $(filesize) 

   setenv bootargs root=/dev/mtdblock2 rootfstype=jffs2 rw init=/linuxrc mem=64M console=ttySAC0,115200
   saveenv

yaffs:
   mkyaffs2image rootfs rootfs.yaffs   //128MN 或 256MB
   mkyaffsimage_2 rootfs rootfs.yaffs   //64MB

   tftp 30008000 rootfs.yaffs
   nand erase 480000 3B60000
   nand write.yaffs 30008000 480000 $(filesize)

   setenv bootargs root=/dev/mtdblock2 rootfstype=yaffs init=/linuxrc mem=64M console=ttySAC0,115200
   saveenv

8.启动优化

1. drivers/char --> pty 255->8
  
2. tty
  /include/linux/vt.h

#define MIN_NR_CONSOLES 1       /* must be at least 1 */
#define MAX_NR_CONSOLES 8       //63    /* serial lines start at 64 */
#define MAX_NR_USER_CONSOLES 8  //63    /* must be root to allocate above this */
 
9. sound移植

1)增加平台设备结构
arch/arm/mach-s3c2440/mach-smdk2440.c

增加头文件：
#include <sound/s3c24xx_uda134x.h>

/* uda1341 */
static struct s3c24xx_uda134x_platform_data s3c24xx_uda134x_data = {
    .l3_clk = S3C2410_GPB(4),
    .l3_data = S3C2410_GPB(3),
    .l3_mode = S3C2410_GPB(2),
    .model = UDA134X_UDA1341,
};

static struct platform_device s3c24xx_uda134x = {
    .name = "s3c24xx_uda134x",
    .dev = {
  .platform_data = &s3c24xx_uda134x_data,
    }
};

static struct platform_device *smdk2440_devices[] __initdata = {
 &s3c_device_usb,
 &s3c_device_lcd,
 &s3c_device_wdt,
 &s3c_device_i2c0,
 &s3c_device_iis,
#ifdef CONFIG_DM9000
     &s3c_device_dm9000,
#endif
 &s3c_device_sdi,
 &s3c24xx_uda134x,
};

2)配置I2C和ALSA

10. RTC时钟的移植
(1)arch/arm/mach-s32440/mach-smdk2440.c

static struct platform_device *smdk2440_devices[] __initdata = {
        &s3c_device_usb,
        &s3c_device_lcd,
        &s3c_device_wdt,
        &s3c_device_i2c0,
        &s3c_device_iis,
#ifdef CONFIG_DM9000
        &s3c_device_dm9000,
#endif
        &s3c_device_sdi,
        &s3c24xx_uda134x,
        &s3c_device_rtc,    //Added for RTC
};

(2)配置内核如下

.Device Drivers --->

        <*> Real Time Clock --->
            [*] Set system time from RTC on startup and resume
            (rtc0) RTC used to set the system time
            [*] /sys/class/rtc/rtcN (sysfs)
            [*] /proc/driver/rtc (procfs for rtc0)
            [*] /dev/rtcN (character devices)
            <*> Samsung S3C series SoC RTC

date

date -s 2010.10.07-hh:mm:ss

hwclock -w

hwclock -s

11.  触摸屏驱动移植
(1) 复制s3c2440_ts.c到drivers/input/touchscreen
(2) 修改 Kconfig,增加如下配置

config TOUCHSCREEN_S3C2440
        tristate "Samsung S3C2440 touchscreen input driver"
        depends on ARCH_S3C2410 && INPUT && INPUT_TOUCHSCREEN
        help
          Say Y here if you have the s3c2410 touchscreen.

          If unsure, say N.

          To compile this driver as a module, choose M here: the
          module will be called s3c2440_ts.

(3) 修改Makefile,增加如下
obj-$(CONFIG_TOUCHSCREEN_S3C2440) += s3c2440_ts.o

(4) 配置选项