SkyEye1.3.1 + ArmLinux2.6.20 下安装触摸屏驱动

1. 按笔者前篇日志(http://blog.csdn.net/Matrix_Designer/archive/2010/10/18/5949713.aspx
)编译安装Skyeye，注意第五项和第六项。

2. 按笔者前篇日志(http://blog.csdn.net/Matrix_Designer/archive/2010/10/18/5949298.aspx
)编译安装LCD驱动。

3. 下载SkyEye TouchScreen For S3C2410的驱动程序(http://blog.csdn.net/Matrix_Designer/archive/2010/11/16/6013607.aspx
)。这是笔者根据ksh提供的armlinux4skyeye-v0.2.3做的修改，仅修改了文件skyeye_ts_drv.c，具体做的修改如下:

将：

//#define ENABLE_PEN_IRQ { INTSR &= ~EINT2; }

//#define DISABLE_PEN_IRQ { INTSR |= EINT2; }

修改成：

#define ENABLE_PEN_IRQ

#define DISABLE_PEN_IRQ

注释掉：

if(!(INTSR&EINT2)) {

return;

}

这三句和：

#include "ep7312_sys.h"

在#define DISABLE_PEN_IRQ的下面添加：

#include <asm/io.h>

#include "asm/arch/smdk2410.h"

#ifndef MOD_DEC_USE_COUNT

#define MOD_DEC_USE_COUNT

#endif

#ifndef MOD_INC_USE_COUNT

#define MOD_INC_USE_COUNT

#endif

static inline int __deprecated verify_area(int type, const void __user * addr,

unsigned long size)

{

return access_ok(type,addr,size) ? 0 : -EFAULT;

}

将：

#define PEN_IRQ_NUM 6

修改为：

#define PEN_IRQ_NUM SMDK2410_TS_IRQ

将：

TS_Buf_start_addr=0xff00b000;

修改成：

TS_Buf_start_addr=vSMDK2410_TS_IO+0x300;

将：

static void handle_pen_irq(int irq, void *dev_id, struct pt_regs *regs);

修改成：

static irqreturn_t handle_pen_irq(int irq, void *dev_id, struct pt_regs *regs);

将：

static void handle_pen_irq(int irq, void *dev_id, struct pt_regs *regs) {

修改成：

static irqreturn_t handle_pen_irq(int irq, void *dev_id, struct pt_regs *regs) {

在函数handle_pen_irq的：

restore_flags(flags);

这一句下面添加：

return IRQ_HANDLED;

4. gedit include/asm-arm/arch-s3c2410/smdk2410.h &

添加定义：

#define pSMDK2410_TS_IO __phys_to_pfn(0x19100000)

#define vSMDK2410_TS_IO S3C2410_ADDR(0xE0100000)

#define SMDK2410_TS_IRQ IRQ_EINT19

5. gedit arch/arm/mach-s3c2410/mach-smdk2410.c &

在结构体map_desc smdk2410_iodesc中

{vSMDK2410_ETH_IO,pSMDK2410_ETH_IO, SZ_1M, MT_DEVICE},的下面添加：

/* Map the touchscreen controller SKYEYE */

{vSMDK2410_TS_IO,pSMDK2410_TS_IO, SZ_1M, MT_DEVICE},

6. cp skyeye_ts_drv.h ./drivers/input/touchscreen/

cp skyeye_ts_drv.c ./drivers/input/touchscreen/

7. gedit drivers/input/touchscreen/Kconfig &

在if INPUT_TOUCHSCREEN的下面添加以下内容：

config TOUCHSCREEN_SKYEYE

tristate "SkyEye Touch Screen support"

depends on INPUT && INPUT_TOUCHSCREEN

help

Support for skyeye based touchscreen. If you build the kernel

for skyeye, and want to use the touchscreen, say Y. To compile

this driver as a module, choose M here and read.

The module will be called skyeye_ts_drv.o.

8. gedit drivers/input/touchscreen/Makefile &

在文件最后添加以下内容：

obj-$(CONFIG_TOUCHSCREEN_SKYEYE) += skyeye_ts_drv.o

9. make menuconfig

选中Device Drivers->Input device support->Touchscreen interface

选中Device Drivers->Input device support->Event interface

选中Device Drivers->Input device support->Event Debugging

选中Device Drivers->Input device support->Touchscreens

选中Device Drivers->Input device support->Touchscreens->SKYEYE based touchscreens

10. make

至此，得到的内核已经可以支持触摸屏，修改SkyEye.conf文件，其内容如下：

# skyeye config file for S3C2410X

arch: arm

cpu: arm920t

mach: s3c2410x

# physical memory

mem_bank: map=M, type=RW, addr=0xC0000000, size=0x00800000

mem_bank: map=M, type=RW, addr=0xC0800000, size=0x01000000, file=./initrd.img

mem_bank: map=M, type=RW, addr=0xC1800000, size=0x02800000

# all peripherals I/O mapping area

mem_bank: map=I, type=RW, addr=0x48000000, size=0x20000000

mem_bank: map=I, type=RW, addr=0x19000300, size=0x00000020

mem_bank: map=I, type=RW, addr=0x19100300, size=0x00000020

net: type=cs8900a, base=0x19000300, size=0x20,int=9, mac=0:4:3:2:1:f, ethmod=tuntap, hostip=10.0.0.1, state=on

lcd: type=s3c2410x, mod=gtk

touchscreen: type=s3c2410x, mod=gtk

uart:mod=term

#dbct:state=on

#log: logon=0, logfile=./sk1.log, start=5000000, end=6000000

最后编写触摸屏测试程序，代码如下：

#include <unistd.h>

#include <stdio.h>

#include <fcntl.h>

/* for data reading from /dev/ts */

typedef struct ts_pen_info {

int x,y; /* pen position */

int dx,dy; /* delta move from last position */

int event; /* event from pen (DOWN,UP,CLICK,MOVE) */

int state; /* state of pen (DOWN,UP,ERROR) */

int ev_no; /* no of the event */

unsigned long ev_time; /* time of the event (ms) since ts_open */

} TS_EVENT;

int main(int argc, char **argv)

{

static int ts = -1;

static TS_EVENT ts_event;

// touch screen

printf("touch screen test program/n");

printf("please touch the screen sizeof():%4d./n",sizeof(TS_EVENT));

ts = open ("/dev/ts", O_RDONLY);

if (ts < 0)

{

fprintf (stderr, "Can not open touch screen!/n");

return 1;

}

while(1)

{

if(read (ts, &ts_event, sizeof (TS_EVENT)))

printf ("touchscreen event: ts_event.x = %4d, ts_event.y = %4d event:%6d, ev_time:%4d/n", ts_event.x, ts_event.y,ts_event.event,ts_event.ev_time);

}

return 0;

}

编写完成后可以在SkyEye中测试触摸屏功能。这个驱动还有点不足之处，就是没有处理中断重入，呵呵。这个以后再搞吧，待续。。。