linux-2.6.36.4移植到TQ2440.doc

1、 内核配置和编译1 修改顶层MakefileARCH?= armCROSS_COMPILE?= arm-linux-根据自己的环境修改交叉编译器前缀2 修改arch/arm/boot/Makefile 增加一行echo Kernel: $ is readycp $ /tftpboot/根据自己的ftp服务器目录修改3 匹配机器码1) 启动u-boot执行bdinfo将输出开发板的相关信息，包括机器码TQ2440 # bdarch_number = 0x0000016A机器码362boot_params = 0x30000100DRAM bank = 0x00000000- start = 0x30000000- size = 0x04000000ethaddr = 00:01:02:03:04:05ip_addr = 00baudrate = 115200 bpsTLB addr = 0x33FF0000relocaddr = 0x33F40000reloc off = 0x33F40000irq_sp = 0x33B2FF68sp start = 0x33B2FF58FB base = 0x00000000TQ2440 # 2) 新版u-boot可以设置环境变量machid来更改机器码TQ2440 # set machid 0x16A3) 内核机器码：arch/arm/mach-s3c2440/mach-smdk2440.c MACHINE_START(S3C2440, SMDK2440)其中的S3C2440即为机器码再查看arch/arm/tools/mach-types 第379行即为S3C2440所对应的机器码362，必须和u-boot的机器码相同，否则没法启动内核4 修改系统时钟arch/arm/mach-s3c2440/mach-smdk2440.c 我们的开发板使用12MHZs3c24xx_init_clocks(12000000);5 执行默认配置rootzjh:/home/work/linux-# make s3c2410_defconfig6 配置内核rootzjh:/home/work/linux-# make menuconfigKernel Features - * Use the ARM EABI to compile the kernel * Allow old ABI binaries to run with this kernel (EXPERIMENTAL) 注：使用 4.X.X 版本的交叉编译器一定要选中以上两项，否则会出现Kernel panic - not syncing: Attempted to kill init! 这样的错误以致没法启动内核System Type - S3C2440 and S3C2442 Machines - * SMDK2440* SMDK2440 with S3C2440 CPU module 只选中这两项即可，其他的Machine都取消7 编译内核rootzjh:/home/work/linux-# make zImage OBJCOPY arch/arm/boot/zImage Kernel: arch/arm/boot/zImage is readyImage Name: linux-2.6.36Created: Wed Oct 17 12:42:19 2012Image Type: ARM Linux Kernel Image (uncompressed)Data Size: 2075944 Bytes = 2027.29 kB = 1.98 MBLoad Address: 30008000Entry Point: 300080008 启动u-boot，执行如下操作TQ2440 # tftp 30000000 uImageTQ2440 # bootm 30000000# Booting image at 30000000 . Image Name: linux-2.6.36 Created: 2012-10-17 4:33:02 UTC Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 2075944 Bytes = 2 MB Load Address: 30008000 Entry Point: 30008000 Verifying Checksum . OK XIP Kernel Image . OKStarting kernel .Uncompressing Linux. done, booting the kernel.Linux version (rootzjh) (gcc version 4.4.3 (ctng-1.6.1) ) #4 Wed Oct 17 12:32:51 CST 2012CPU: ARM920T 41129200 revision 0 (ARMv4T), cr=c0007177CPU: VIVT data cache, VIVT instruction cacheMachine: SMDK2440Memory policy: ECC disabled, Data cache writebackCPU S3C2440A (id 0x32440001)S3C24XX Clocks, Copyright 2004 Simtec ElectronicsS3C244X: core 400.000 MHz, memory 100.000 MHz, peripheral 50.000 MHz2、 DM9000网卡驱动移植1 修改arch/arm/mach-s3c2440/mach-smdk2440.c，构建DM9000平台设备#include #define MACH_TQ2440_DM9K_BASE (S3C2410_CS4 + 0x300)/* support DM9000 */static struct resource TQ2440_dm9k_resource = 0 = .start = MACH_TQ2440_DM9K_BASE,.end = MACH_TQ2440_DM9K_BASE + 3,.flags = IORESOURCE_MEM,1 = .start = MACH_TQ2440_DM9K_BASE + 4,.end = MACH_TQ2440_DM9K_BASE + 7,.flags = IORESOURCE_MEM,2 = .start = IRQ_EINT7,.end = IRQ_EINT7,.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,;/* * The DM9000 has no eeprom, and set its MAC address */static struct dm9000_plat_data TQ2440_dm9k_pdata = .flags= (DM9000_PLATF_16BITONLY | DM9000_PLATF_NO_EEPROM),.dev_addr = x00x11x22x33x44x66,;static struct platform_device TQ2440_device_eth = .name= dm9000,.id= -1,.num_resources= ARRAY_SIZE(TQ2440_dm9k_resource),.resource= TQ2440_dm9k_resource,.dev= .platform_data= &TQ2440_dm9k_pdata,;smdk2440_devices结构体数组添加如下代码&TQ2440_device_eth2 修改drivers/net/ethernet/davicom/dm9000.c第44行加入如下代码#include dm9000.h#if defined(CONFIG_ARCH_S3C2440) #include #endif第1375行加入如下代码u32 id_val;#if defined(CONFIG_ARCH_S3C2440) unsigned int oldval_bwscon = *(volatile unsigned int *)S3C2410_BWSCON; unsigned int oldval_bankcon4 = *(volatile unsigned int *)S3C2410_BANKCON4; #endif /* Init network device */第1387行加入如下代码dev_dbg(&pdev-dev, dm9000_probe()n);#if defined(CONFIG_ARCH_S3C2440)/* 设置Bank4：总线宽度为16，使能nWAIT */ *(volatile unsigned int *)S3C2410_BWSCON) = (oldval_bwscon & (3 Networking options - Packet socket Unix domain socket* TCP/IP networking* IP: multicasting * IP: kernel level autoconfiguration* IP: BOOTP supportDevice Drivers -* Network device support -* Ethernet (10 or 100Mbit) - DM9000 support File systems -* Network File Systems (NEW) - NFS client support * NFS client support for NFS version 3 (NEW)* NFS client support for the NFSv3 ACL protocol extension * Root file system on NFS4 重新编译内核并设置u-boot启动参数，通过NFS挂载根文件系统TQ2440 # set bootargs root=/dev/nfs nfsroot=:/home/work/rootfs ip=00 init=/linuxrc console=ttySAC0,115200TQ2440 # save5 下载内核并启动TQ2440 # tftp 30000000 uImageTQ2440 # bootm 30000000roottq2440 /#3、 移植内核自带的LED驱动1 在BSP文件arch/arm/mach-s3c2440/mach-smdk2440.c增加我们开发板的LED配置#include static struct gpio_led tq2440_leds = 0 = .name = led1,.gpio = S3C2410_GPB(5),.active_low = 1,1 = .name = led2,.gpio = S3C2410_GPB(6),.active_low = 1,2 = .name = led3,.gpio = S3C2410_GPB(7),.active_low = 1,3 = .name = led4,.gpio = S3C2410_GPB(8),.active_low = 1,;static struct gpio_led_platform_data tq2440_leds_pdata = .num_leds= ARRAY_SIZE(tq2440_leds),.leds = tq2440_leds,;static struct platform_device tq2440_device_leds = .name = leds-gpio,.id = -1,.dev= .platform_data = &tq2440_leds_pdata,;在smdk2440_devices平台数组中添加&tq2440_device_leds,2 配置内核Device Drivers -*- LED Support - LED Class Support LED Support for Samsung S3C24XX GPIO LEDs LED Support for GPIO connected LEDs* Platform device bindings for GPIO LEDs3 重新编译内核roottq2440 /# ll /sys/class/leds/total 0drwxr-xr-x 3 root root 0 Jan 1 00:00 led1drwxr-xr-x 3 root root 0 Jan 1 00:00 led2drwxr-xr-x 3 root root 0 Jan 1 00:00 led3drwxr-xr-x 3 root root 0 Jan 1 00:00 led4roottq2440 /# echo 1 sys/class/leds/led1/brightness 点亮LED1 roottq2440 /# echo 0 sys/class/leds/led1/brightness 熄灭LED14、 RTC驱动移植1 在arch/arm/mach-s3c2440/mach-smdk2440.c的smdk2440_devices结构体数组添加rtc平台设备列表&s3c_device_rtc,2 配置内核Device Drivers -* Real Time Clock -* Set system time from RTC on startup and resume (NEW)(rtc0) RTC used to set the system time* /sys/class/rtc/rtcN (sysfs) (NEW)* /proc/driver/rtc (procfs for rtc0) (NEW)* /dev/rtcN (character devices) (NEW) Samsung S3C series SoC RTC3 重新编译内核并下载到开发板roottq2440 /# dateThu Jan 1 00:09:48 UTC 1970roottq2440 /# date -s 2012.10.17-22:30:0设置时间Wed Oct 17 22:30:00 UTC 2012roottq2440 /# hwclock -w设置硬件时间为当前系统时间这样系统重启后会自动更新到硬件时间5、 LCD驱动移植1 在arch/arm/mach-s3c2440/mach-smdk2440.c中修改LCD参数.width= 480,.height= 272,.pixclock= (2 * 1000000000000LL)/(60 * (2 + 2 + 41 + 480) * (2 + 2 + 10 + 272),.xres= 480,.yres= 272,.bpp= 16,.left_margin= 2,.right_margin= 2,.hsync_len= 41,.upper_margin= 2,.lower_margin= 2,.vsync_len= 10,将下面这行注释掉/.lpcsel= (0xCE6) & 7) | 1Graphics support - Support for frame buffer devices - S3C2410 LCD framebuffer support* Bootup logo - Standard black and white Linux logo Standard 16-color Linux logo* Standard 224-color Linux logo (NEW)4 重新编译内核将看到LCD显示开机logo5 解决10分钟后黑屏：修改drivers/char/vt.c可修改static int blankinterval = 10*60;默认为10分钟后LCD背光就自动关闭，当发生中断就会开启，改为0，LCD就常亮。6 关闭光标:修改/drivers/video/console/softcursor.cint soft_cursor(struct fb_info *info, struct fb_cursor *cursor)#if 0struct fbcon_ops *ops = info-fbcon_par;unsigned int scan_align = info-pixmap.scan_align - 1;unsigned int buf_align = info-pixmap.buf_align - 1;unsigned int i, size, dsize, s_pitch, d_pitch;struct fb_image *image;u8 *src, *dst;if (info-state != FBINFO_STATE_RUNNING)return 0;s_pitch = (cursor-image.width + 7) 3;dsize = s_pitch * cursor-image.height;if (dsize + sizeof(struct fb_image) != ops-cursor_size) if (ops-cursor_src != NULL)kfree(ops-cursor_src);ops-cursor_size = dsize + sizeof(struct fb_image);ops-cursor_src = kmalloc(ops-cursor_size, GFP_ATOMIC);if (!ops-cursor_src) ops-cursor_size = 0;return -ENOMEM;src = ops-cursor_src + sizeof(struct fb_image);image = (struct fb_image *)ops-cursor_src;*image = cursor-image;d_pitch = (s_pitch + scan_align) & scan_align;size = d_pitch * image-height + buf_align;size &= buf_align;dst = fb_get_buffer_offset(info, &info-pixmap, size);if (cursor-enable) switch (cursor-rop) case ROP_XOR:for (i = 0; i datai cursor-maski;break;case ROP_COPY:default:for (i = 0; i datai & cursor-maski;break; elsememcpy(src, image-data, dsize);fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, image-height);image-data = dst;info-fbops-fb_imageblit(info, image);#endifreturn 0;6、 触摸屏驱动移植1 在BSP文件加入头文件#include 2 加入触摸屏数据static struct s3c2410_ts_mach_info hard_s3c2410ts_info = .delay = 0xffff,.oversampling_shift = 2,.cfg_gpio = s3c24xx_ts_cfg_gpio,;3 添加触摸屏和ADC平台设备列表，ADC一定要在TS前面&s3c_device_adc,&s3c_device_ts,4 加入如下函数，这个函数将上面加入的结构体设为触摸屏设备的s3c_device_ts.dev.platform_datastatic void _init smdk2440_machine_init(void)s3c24xx_fb_set_platdata(&smdk2440_fb_info);s3c_i2c0_set_platdata(NULL);s3c24xx_mci_set_platdata(&sd_cfg);s3c24xx_ts_set_platdata(&hard_s3c2410ts_info);platform_add_devices(smdk2440_devices, ARRAY_SIZE(smdk2440_devices);smdk_machine_init();5 修改arch/arm/plat-s3c24xx/Kconfig config S3C2410_SETUP_TS bool Touchscreen setup6 配置内核System Type -* Touchscreen setup Device Drivers -Input device support -* Touchscreens - Samsung S3C2410/generic touchscreen input driver7 重新编译内核启动时输出samsung-ts s3c2440-ts: driver attached, registering input deviceinput: S3C24XX TouchScreen as /class/input/input18 编写用户空间测试程序#include #include #include #include #include #include #include #include #include int fd;struct input_event event;void input_handle(int signum)if (read(fd, &event, sizeof(struct input_event)* Watchdog Timer Support - S3C2410 Watchdog4 重新编译内核并下载到开发板，串口输出：s3c2410_wdt: S3C2410 Watchdog Timer, (c) 2004 Simtec Electronicss3c2410-wdt s3c2410-wdt: starting watchdog timers3c2410-wdt s3c2410-wdt: watchdog active, reset enabled, irq disabled此时由于没有喂狗，系统启动后过会会自动重启5 编写喂狗程序feed_wdt.c#include #include #include #include #include int main()int fd;if (fd = open(/dev/watchdog, O_RDONLY)/proc/sys/kernel/hotplugmdev -sfeed_wdt &ifconfig lo ifconfig eth0 00 netmask route add default gw 8、 按键输入子系统移植1 arch/arm/mach-s3c2440/mach-smdk2440.c加入按键相关platform代码#include #include static struct gpio_keys_button tq2440_buttons = .gpio= S3C2410_GPF(1),.code= KEY_UP,.desc= Up,.active_low= 1,.wakeup= 0,.gpio= S3C2410_GPF(4),.code= KEY_DOWN,.desc= Down,.active_low= 1,.wakeup= 0,.gpio= S3C2410_GPF(2),.code= KEY_LEFT,.desc= Left,.active_low= 1,.wakeup= 0,.gpio= S3C2410_GPF(0),.code= KEY_RIGHT,.desc= Right,.active_low= 1,.wakeup= 0,;static struct gpio_keys_platform_data tq2440_button_data = .buttons = tq2440_buttons,.nbuttons = ARRAY_SIZE(tq2440_buttons),;static struct platform_device tq2440_device_button = .name= gpio-keys,.id= -1,.dev= .platform_data =&tq2440_button_data,;在smdk2440_devices中加入platform设备&tq2440_device_button,2 配置内核Device Drivers -Input device support -* Keyboards - GPIO Buttons3 重新编译内核4 编写用户空间测试程序gpio_button.c#include #include #include #include #include int main(int argc, char *argv)int fd = -1;int num;size_t rb;int version;char name20;struct input_event ev;if (fd = open(/dev/event0, O_RDONLY) 0)perror(open error);exit(1);if (ioctl(fd, EVIOCGNAME(sizeof(name)-1), name) 0)perror(getname error);exit(1);/printf(name=%sn, name);if (ioctl(fd, EVIOCGVERSION, &version) 0)perror(getversion error);exit(1);/printf(version=0x%xn, version);while(1)rb = read(fd, &ev, sizeof(struct input_event);if (rb (int)sizeof(struct input_event)perror(read error);exit(1);/printf(read %d eventn, (int)(rb/sizeof(struct input_event);if (EV_KEY=ev.type)if (1 = ev.value)printf(key %d is pressedn, ev.code);elseprintf(key %d is releassedn, ev.code);close(fd);return 0; 9、 SD驱动移植1 arch/arm/mach-s3c2440/mach-smdk2440.c中添加头文件#include #include 2 arch/arm/mach-s3c2440/mach-smdk2440.c中填充如下结构static struct s3c24xx_mci_pdata sd_cfg = .no_wprotect = true,.gpio_detect = S3C2410_GPG(8),.set_power = NULL,.ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34,;3 添加如下函数：这个函数将上面添加结构体sd_cfg 设为SD 卡平台设备结构s3c_device_sdi的platform_data。static void _init smdk2440_machine_init(void)s3c24xx_fb_set_platdata(&smdk2440_fb_info);s3c_i2c0_set_platdata(NULL);s3c24xx_mci_set_platdata(&sd_cfg);platform_add_devices(smdk2440_devices, ARRAY_SIZE(smdk2440_devices);smdk_machine_init();4 arch/arm/mach-s3c2440/mach-smdk2440.c plat_device 结构体中加入&s3c_device_sdi,5 配置内核支持SD卡Device Drivers - MMC/SD/SDIO card support - MMC block device driver* Use bounce buffer for simple hosts Samsung S3C SD/MMC Card Interface support6 重新编译内核插入SD卡roottq2440 /# s3c-sdi s3c2440-sdi: running at 0kHz (requested: 0kHz).s3c-sdi s3c2440-sdi: running at 400kHz (requested: 400kHz).s3c-sdi s3c2440-sdi: running at 400kHz (requested: 400kHz).s3c-sdi s3c2440-sdi: running at 400kHz (requested: 400kHz).s3c-sdi s3c2440-sdi: running at 400kHz (requested: 400kHz).s3c-sdi s3c2440-sdi: running at 400kHz (requested: 400kHz).s3c-sdi s3c2440-sdi: running at 400kHz (requested: 400kHz).s3c-sdi s3c2440-sdi: running at 400kHz (requested: 400kHz).s3c-sdi s3c2440-sdi: running at 25000kHz (requested: 25000kHz).s3c-sdi s3c2440-sdi: running at 25000kHz (requested: 25000kHz).mmc0: new SDHC card at address e624mmcblk0: mmc0:e624 SU04G 3.69 GiB mmcblk0: p1roottq2440 /# mount /dev/mmcblk0p1 /mnt/ 手动挂载SD卡roottq2440 /# ls /mnt/列出SD内容z.txtroottq2440 /# umount /mnt/卸载SD卡7 实现自动挂载SD卡在根文件系统根目录下创建用于挂载SD卡的目录rootzjh:/home/rootfs# mkdir sddisk在etc/下创建配置文件mdev.confrootzjh:/home/work/rootfs# vi etc/mdev.conf内容如下mmcblk0-9*p0-90:00660(mount -t vfat /dev/$MDEV /sddisk)mmcblk0-9*p0-90:00660$(umount /sddisk)更多mdev.conf的设置可参考busybox的docs/m