【转】 linux内核移植和驱动添加（三）

原文网址：http://blog.chinaunix.net/uid-29589379-id-4708909.html

原文地址：linux内核移植和驱动添加（三）作者：genehang

四，LED驱动的添加

1，将led.c驱动文件拷贝到linux-3.1.4/drivers/char/目录下

root@char# pwd

/change/linux-3.1.4/drivers/char

root@char# cp /mnt/hgfs/fh/driver/my_driver/led.c ./

2，修改当前目录下的配置文件，增加内核配置项

root@char# vim Kconfig

添加：

config ARCH_S3C2410_LED

tristate "s3c2410 led support"

default y

help

s3c2410 led support

3，修改Makefile，添加内核配置

root@char# vim Makefile

obj-$(CONFIG_ARCH_S3C2410_LED) +=led.o

4，配置板文件资源

1）struct resource smdk2410_myres[] = {

[0] = {

.start = 0x56000054,

.end = 0x56000054,

.flags = IORESOURCE_MEM,

}, //GPFDAT

[1] = {

.start = 0x56000050,

.end = 0x56000050,

.flags = IORESOURCE_MEM,

}, //GPFCON

};

2）struct platform_device smdk2410_platdev = {

.name ="led_driver",//驱动程序里面的设备名

.id = 0,

.num_resources = ARRAY_SIZE(smdk2410_myres),

.resource = smdk2410_myres,

};

3）static struct platform_device *smdk2410_devices[] __initdata = {

&smdk2410_platdev,

}

注：我这里用的是fs2410开发板上的D12号led灯，配置其他的led灯同理。

5，配置内核

root@linux-3.1.4# make menuconfig

Device Drivers --->

Character devices --->

<*> s3c2410 led support (NEW)

6，重新编译内核

Make zImage

五，蜂鸣器的驱动添加

蜂鸣器的驱动添加和led的驱动添加过程是一样的，过程如下：

1， root@char# cp /mnt/hgfs/fh/driver/my_driver/beep.c ./

2，修改drivers/char/Kconfig,提供内核配置项

config ARCH_S3C2410_BEEP

tristate "s3c2410 beep support

default y

help

s3c2410 beep support

3，修改Makefile

obj-$(CONFIG_ARCH_S3C2410_BEEP) += beep.o

4，资源选配，和led的资源选配同理

5，选配内核

root@linux-3.1.4# make menuconfig

Device Drivers --->

Character devices --->

<*> s3c2410 beep support (NEW)

6，编译内核

root@linux-3.1.4# make zImage

六，LCD驱动的添加

在嵌入式系统中，lcd常作为交互使用，其移植步骤如下：

1，在板文件arch/arm/mach-s3c2410/mach-smdk2310.c中添加下列的头文件

root@mach-s3c2410# vim mach-smdk2410.c

#include <mach/fb.h>

#include <mach/regs-lcd.h>

2，添加LCD相关的平台信息

root@mach-s3c2410# vim mach-smdk2410.c

//相关的配置信息根据LCD屏相应的参数配置

static struct s3c2410fb_display s3c2410_lcd_cfg[] __initdata = {

{

.lcdcon5 = S3C2410_LCDCON5_FRM565 |

S3C2410_LCDCON5_INVVCLK |

S3C2410_LCDCON5_INVVLINE |

S3C2410_LCDCON5_INVVFRAME|

S3C2410_LCDCON5_PWREN |

S3C2410_LCDCON5_HWSWP,

.type = S3C2410_LCDCON1_TFT,

.width = 320,

.height = 240,

.pixclock = 100000,

.xres = 320,

.yres = 240,

.bpp = 16,

.left_margin = 20,//13,

.right_margin = 38,//8,

.hsync_len = 30,//4,

.upper_margin = 4,//2,

.lower_margin = 15,//7,

.vsync_len = 3,//4,

};

static struct s3c2410fb_mach_info s3c2410_fb_info __initdata = {

.displays = s3c2410_lcd_cfg,

.num_displays = ARRAY_SIZE(s3c2410_lcd_cfg),

.default_display= 0,

.gpcup = 0xffffffff,

.gpcup_mask = 0xffffffff,

.gpccon = 0xaa9556a9,

.gpccon_mask = 0xffffffff,

.gpdup = 0xffffffff,

.gpdup_mask = 0xffffffff,

.gpdcon = 0xaaaaaaaa,

.gpdcon_mask = 0xffffffff,

.lpcsel = ((0xCE6) & ~7) | 1<<4,

};

static void __init smdk2410_init(void)

{

s3c24xx_fb_set_platdata(&s3c2410_fb_info);

}

3，配置内核

root@linux-3.1.4# make menuconfig

Device Drivers --->

Graphics support --->

<*> Support for frame buffer devices --->

<*> S3C2410 LCD framebuffer support

[*] Bootup logo --->//LCD成功启动，就可以看见linuxLOGO^^

4，编译内核

make zImage

七，USB驱动的添加

1，配置内核

root@linux-3.1.4# make menuconfig

Device Drivers --->

SCSI device support --->

<*> SCSI disk support

<*> SCSI generic support

<*> SCSI media changer support

[*] USB support --->

<*> USB Mass Storage support

File systems --->

-*- Native language support --->

<*> Codepage 437 (United States, Canada)

<*> Simplified Chinese charset (CP936, GB2312)

<*> ASCII (United States)

<*> NLS ISO 8859-1 (Latin 1; Western European Languages)

2，编译内核

make zImage

八，视频V4L2驱动的添加

1，配置内核

Device Drivers --->

<*> Multimedia support --->

<*> Video For Linux

[*] Video capture adapters (NEW) --->

[*] V4L USB devices (NEW) --->

<*> USB Video Class (UVC)

[*] UVC input events device support (NEW)

2，编译内核

make zImage

进过上面八个步骤的配置，我们可以在板子上面看见这样的打印信息：

Using CS8900-0 device

TFTP from server 192.168.2.201; our IP address is 192.168.2.200

Filename 'zImage'.

Load address: 0x30008000

Loading: #################################################################

#################################################################

####################################

done

Bytes transferred = 2430016 (251440 hex)

setup linux parameters at 0x30000100

linux command line is: "root=nfs nfsroot=192.168.2.201:/source/rootfs init=/linuxrc console=ttySAC0,115200 ip=192.168.2.200"

## Starting application at 0x30008000 ...

Uncompressing Linux... done, booting the kernel.

Linux version 3.1.4@genehang (root@ubuntu) (gcc version 4.4.3 (ctng-1.6.1) ) #7 Thu Jan 12 14:38:47 CST 2012

CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=00007177

CPU: VIVT data cache, VIVT instruction cache

Machine: fs2410@panzhh

ATAG_INITRD is deprecated; please update your bootloader.

Memory policy: ECC disabled, Data cache writeback

BUG: mapping for 0x19000000 at 0xe0000000 overlaps vmalloc space

CPU S3C2410A (id 0x32410002)

S3C2410: core 202.800 MHz, memory 101.400 MHz, peripheral 50.700 MHz

CLOCK: Slow mode (1.500 MHz), fast, MPLL on, UPLL on

Built 1 zonelists in Zone order, mobility grouping on. Total pages: 16256

Kernel command line: root=nfs nfsroot=192.168.2.201:/source/rootfs init=/linuxrc console=ttySAC0,115200 ip=192.168.2.200

PID hash table entries: 256 (order: -2, 1024 bytes)

Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)

Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)

Memory: 64MB = 64MB total

Memory: 60140k/60140k available, 5396k reserved, 0K highmem

Virtual kernel memory layout:

vector : 0xffff0000 - 0xffff1000 ( 4 kB)

fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)

DMA : 0xffc00000 - 0xffe00000 ( 2 MB)

vmalloc : 0xc4800000 - 0xf6000000 ( 792 MB)

lowmem : 0xc0000000 - 0xc4000000 ( 64 MB)

modules : 0xbf000000 - 0xc0000000 ( 16 MB)

.text : 0xc0008000 - 0xc0439a60 (4295 kB)

.init : 0xc043a000 - 0xc045d000 ( 140 kB)

.data : 0xc045e000 - 0xc04864e0 ( 162 kB)

.bss : 0xc0486504 - 0xc04aead4 ( 162 kB)

NR_IRQS:85

irq: clearing subpending status 00000002

Console: colour dummy device 80x30

Calibrating delay loop... 50.17 BogoMIPS (lpj=125440)

pid_max: default: 32768 minimum: 301

Mount-cache hash table entries: 512

CPU: Testing write buffer coherency: ok

gpiochip_add: gpios 256..271 (GPIOJ) failed to register

gpiochip_add: gpios 288..303 (GPIOK) failed to register

gpiochip_add: gpios 320..334 (GPIOL) failed to register

gpiochip_add: gpios 352..353 (GPIOM) failed to register

NET: Registered protocol family 16

S3C2410: Initialising architecture

bio: create slab <bio-0> at 0

SCSI subsystem initialized

usbcore: registered new interface driver usbfs

usbcore: registered new interface driver hub

usbcore: registered new device driver usb

NET: Registered protocol family 2

IP route cache hash table entries: 1024 (order: 0, 4096 bytes)

TCP established hash table entries: 2048 (order: 2, 16384 bytes)

TCP bind hash table entries: 2048 (order: 1, 8192 bytes)

TCP: Hash tables configured (established 2048 bind 2048)

TCP reno registered

UDP hash table entries: 256 (order: 0, 4096 bytes)

UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)

NET: Registered protocol family 1

RPC: Registered named UNIX socket transport module.

RPC: Registered udp transport module.

RPC: Registered tcp transport module.

RPC: Registered tcp NFSv4.1 backchannel transport module.

NetWinder Floating Point Emulator V0.97 (extended precision)

s3c-adc s3c24xx-adc: attached adc driver

JFFS2 version 2.2. (NAND) (SUMMARY) 漏 2001-2006 Red Hat, Inc.

msgmni has been set to 117

io scheduler noop registered

io scheduler deadline registered

io scheduler cfq registered (default)

Console: switching to colour frame buffer device 40x30

fb0: s3c2410fb frame buffer device

Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled

s3c2410-uart.0: ttySAC0 at MMIO 0x50000000 (irq = 70) is a S3C2410

console [ttySAC0] enabled

s3c2410-uart.1: ttySAC1 at MMIO 0x50004000 (irq = 73) is a S3C2410

lp: driver loaded but no devices found

==========beep==============

==========led=============

ppdev: user-space parallel port driver

brd: module loaded

loop: module loaded

Uniform Multi-Platform E-IDE driver

ide-gd driver 1.18

ide-cd driver 5.00

SCSI Media Changer driver v0.25

s3c24xx-nand s3c2410-nand: Tacls=3, 29ns Twrph0=7 69ns, Twrph1=3 29ns

s3c24xx-nand s3c2410-nand: NAND hardware ECC

NAND device: Manufacturer ID: 0xec, Chip ID: 0x76 (Samsung NAND 64MiB 3,3V 8-bit)

Scanning device for bad blocks

Creating 4 MTD partitions on "NAND":

0x000000000000-0x000000040000 : "uBoot"

0x000000040000-0x000000440000 : "kernel"

0x000000440000-0x000000c40000 : "fs"

0x000000c40000-0x000004000000 : "extern fs"

Cirrus Logic CS8900A driver for Linux (Modified for SMDK2410)

eth0: CS8900A rev E at 0xe0000300 irq=53, addr: 00: 0:3E:26:0A: 0

ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver

s3c2410-ohci s3c2410-ohci: S3C24XX OHCI

s3c2410-ohci s3c2410-ohci: new USB bus registered, assigned bus number 1

s3c2410-ohci s3c2410-ohci: irq 42, io mem 0x49000000

hub 1-0:1.0: USB hub found

hub 1-0:1.0: 2 ports detected

Initializing USB Mass Storage driver...

usbcore: registered new interface driver usb-storage

USB Mass Storage support registered.

usbcore: registered new interface driver libusual

usbcore: registered new interface driver usbserial

USB Serial support registered for generic

usbcore: registered new interface driver usbserial_generic

usbserial: USB Serial Driver core

USB Serial support registered for FTDI USB Serial Device

usbcore: registered new interface driver ftdi_sio

ftdi_sio: v1.6.0:USB FTDI Serial Converters Driver

USB Serial support registered for pl2303

usbcore: registered new interface driver pl2303

pl2303: Prolific PL2303 USB to serial adaptor driver

mousedev: PS/2 mouse device common for all mice

s3c-rtc s3c2410-rtc: rtc disabled, re-enabling

s3c-rtc s3c2410-rtc: rtc core: registered s3c as rtc0

Linux video capture interface: v2.00

usbcore: registered new interface driver uvcvideo

USB Video Class driver (1.1.1)

s3c2410-wdt s3c2410-wdt: watchdog inactive, reset disabled, irq enabled

s3c-sdi s3c2410-sdi: powered down.

s3c-sdi s3c2410-sdi: mmc0 - using pio, sw SDIO IRQ

TCP cubic registered

NET: Registered protocol family 17

s3c-rtc s3c2410-rtc: setting system clock to 2003-12-26 11:23:28 UTC (1072437808)

cs8900_start

enable the ethernet controlle

request_irq

IP-Config: Guessing netmask 255.255.255.0

IP-Config: Complete:

device=eth0, addr=192.168.2.200, mask=255.255.255.0, gw=255.255.255.255,

host=192.168.2.200, domain=, nis-domain=(none),

bootserver=255.255.255.255, rootserver=192.168.2.201, rootpath=

VFS: Mounted root (nfs filesystem) on device 0:12.

Freeing init memory: 140K

Please press Enter to activate this console.

[root@$ /]#usb 1-1: new full speed USB device number 2 using s3c2410-ohci

uvcvideo: Found UVC 1.00 device USB2.0 Camera (1871:0316)

input: USB2.0 Camera as /devices/platform/s3c2410-ohci/usb1/1-1/1-1:1.0/input/input0

[root@$ /]#ls

beep_app dev home linuxrc root tmp

bin etc led_app mnt sbin usr

boot fun lib proc sys var

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【转】 linux内核移植和驱动添加（三）

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