觸摸屏驅動也是參考這篇文章:http://www.cnblogs.com/zuobaozhu/archive/2012/05/13/2498092.html#_Toc324535492 所以以下#####################內的文字純屬複製這位網友的,當然編譯時有些小錯誤,不過都是很容易解決的,本人打字慢,就不提了。 ##################################################
以下copy 是指需要飛凌提供的內核裏的驅動源碼, dev-ts.c ts 板載初始化和platform 資源初始化 文件。
arch/arm/mach-s3c64xx/mach-smdk6410.c
註銷掉頭文件 #include<plat/ts.h>
添加頭文件 #include<mach/ts.h>
copy arch/arm/mach-s3c64xx/include/mach/ts.h 到目標內核目錄
copy arch/arm/mach-s3c64xx/dev-ts.c 到目標內核目錄在 arch/arm/mach-s3c64xx/Makefile 中添加
obj-$(CONFIG_TOUCHSCREEN_S3C) += dev-ts.o
在裏面 添加宏定義arch/arm/mach-s3c64xx/dev-ts.c
#define SZ_256 0x00000100
添加頭文件#include <linux/slab.h>,這就有很多linux3.3和2.6不同的地方
添加 ts 設備初始化 ,在smdk6410_machine_init () 結構體中
//s3c24xx_ts_set_platdata(NULL);
s3c_ts_set_platdata(&s3c_ts_platform);
添加結構體s3c_ts_platform
static struct s3c_ts_mach_info s3c_ts_platform __initdata = {
.delay = 10000,
.presc = 49,
.oversampling_shift = 2,
.resol_bit = 12,
.s3c_adc_con = ADC_TYPE_2,
};
把飛凌官方的s3c-tc.c拷貝到drivers/input/touchscreen/這裏建議拷貝他3.0的系統的
修改 drivers/input/touchscreen/Makefile
添加 obj-$(CONFIG_TOUCHSCREEN_S3C) += s3c-ts.o
修改 drivers/input/tourch/screen/Kconfig
添加 config TOUCHSCREEN_S3C
config TOUCHSCREEN_S3C
tristate "S3C touchscreen driver"
depends on ARCH_S3C2410 || ARCH_S3C64XX || ARCH_S5P64XX || ARCH_S5PC1XX
default y
help
Say Y here to enable the driver for the touchscreen on the
S3C SMDK board.
註釋掉arch/arm/plat-samsung/devs.c裏面大概1223到1277行的如下代碼:
/* Touchscreen */
//#ifdef CONFIG_PLAT_S3C24XX
/*static struct resource s3c_ts_resource[] = {
[0] = DEFINE_RES_MEM(S3C24XX_PA_ADC, S3C24XX_SZ_ADC),
[1] = DEFINE_RES_IRQ(IRQ_TC),
};
struct platform_device s3c_device_ts = {
.name = "s3c2410-ts",
.id = -1,
.dev.parent = &s3c_device_adc.dev,
.num_resources = ARRAY_SIZE(s3c_ts_resource),
.resource = s3c_ts_resource,
};
void __init s3c24xx_ts_set_platdata(struct s3c2410_ts_mach_info *hard_s3c2410ts_info)
{
s3c_set_platdata(hard_s3c2410ts_info,
sizeof(struct s3c2410_ts_mach_info), &s3c_device_ts);
}
*/
//#endif /* CONFIG_PLAT_S3C24XX */
/*#ifdef CONFIG_SAMSUNG_DEV_TS
static struct resource s3c_ts_resource[] = {
[0] = DEFINE_RES_MEM(SAMSUNG_PA_ADC, SZ_256),
[1] = DEFINE_RES_IRQ(IRQ_TC),
};
*/
/*static struct s3c2410_ts_mach_info default_ts_data __initdata = {
.delay = 10000,
.presc = 49,
.oversampling_shift = 2,
};
struct platform_device s3c_device_ts = {
.name = "s3c64xx-ts",
.id = -1,
.num_resources = ARRAY_SIZE(s3c_ts_resource),
.resource = s3c_ts_resource,
};
void __init s3c24xx_ts_set_platdata(struct s3c2410_ts_mach_info *pd)
{
if (!pd)
pd = &default_ts_data;
s3c_set_platdata(pd, sizeof(struct s3c2410_ts_mach_info),
&s3c_device_ts);
}
*/
//#endif /* CONFIG_SAMSUNG_DEV_TS */
在arch/arm/ plat-samsung/include/plat/regs-adc.h的後面添加以下代碼:
#define S3C_ADCREG(x) (x)
#define S3C_ADCCON S3C_ADCREG(0x00)
#define S3C_ADCTSC S3C_ADCREG(0x04)
#define S3C_ADCDLY S3C_ADCREG(0x08)
#define S3C_ADCDAT0 S3C_ADCREG(0x0C)
#define S3C_ADCDAT1 S3C_ADCREG(0x10)
#define S3C_ADCUPDN S3C_ADCREG(0x14)
#define S3C_ADCCLRINT S3C_ADCREG(0x18)
#define S3C_ADCMUX S3C_ADCREG(0x1C)
#define S3C_ADCCLRWK S3C_ADCREG(0x20)
/* ADCCON Register Bits */
#define S3C_ADCCON_RESSEL_10BIT (0x0<<16)
#define S3C_ADCCON_RESSEL_12BIT (0x1<<16)
#define S3C_ADCCON_ECFLG (1<<15)
#define S3C_ADCCON_PRSCEN (1<<14)
#define S3C_ADCCON_PRSCVL(x) (((x)&0xFF)<<6)
#define S3C_ADCCON_PRSCVLMASK (0xFF<<6)
#define S3C_ADCCON_SELMUX(x) (((x)&0x7)<<3)
#define S3C_ADCCON_SELMUX_1(x) (((x)&0xF)<<0)
#define S3C_ADCCON_MUXMASK (0x7<<3)
#define S3C_ADCCON_RESSEL_10BIT_1 (0x0<<3)
#define S3C_ADCCON_RESSEL_12BIT_1 (0x1<<3)
#define S3C_ADCCON_STDBM (1<<2)
#define S3C_ADCCON_READ_START (1<<1)
#define S3C_ADCCON_ENABLE_START (1<<0)
#define S3C_ADCCON_STARTMASK (0x3<<0)
/* ADCTSC Register Bits */
#define S3C_ADCTSC_UD_SEN (1<<8)
#define S3C_ADCTSC_YM_SEN (1<<7)
#define S3C_ADCTSC_YP_SEN (1<<6)
#define S3C_ADCTSC_XM_SEN (1<<5)
#define S3C_ADCTSC_XP_SEN (1<<4)
#define S3C_ADCTSC_PULL_UP_DISABLE (1<<3)
#define S3C_ADCTSC_AUTO_PST (1<<2)
#define S3C_ADCTSC_XY_PST(x) (((x)&0x3)<<0)
/* ADCDAT0 Bits */
#define S3C_ADCDAT0_UPDOWN (1<<15)
#define S3C_ADCDAT0_AUTO_PST (1<<14)
#define S3C_ADCDAT0_XY_PST (0x3<<12)
#define S3C_ADCDAT0_XPDATA_MASK (0x03FF)
#define S3C_ADCDAT0_XPDATA_MASK_12BIT (0x0FFF)
/* ADCDAT1 Bits */
#define S3C_ADCDAT1_UPDOWN (1<<15)
#define S3C_ADCDAT1_AUTO_PST (1<<14)
#define S3C_ADCDAT1_XY_PST (0x3<<12)
#define S3C_ADCDAT1_YPDATA_MASK (0x03FF)
#define S3C_ADCDAT1_YPDATA_MASK_12BIT (0x0FFF)
#endif /* __ASM_ARCH_REGS_ADC_H */
配置內核:
System Type --->
[*] ADC common driver support
Device Drivers --->
Input device support --->
[*] Touchscreens --->
<*> S3C touchscreen driver (只選這一個,其他的不要選)
<*> Event interface
如果觸摸屏驅動沒有問題的會就會出現以下驅動信息:
S3C Touchscreen driver, (c) 2008 Samsung Electronics
S3C TouchScreen got loaded successfully : 12 bits
input: S3C TouchScreen as /devices/virtual/input/input0
#################################################
按照這位網友的操作移植後開機出現:
S3C Touchscreen driver, (c) 2008 Samsung Electronics
s3c-ts s3c-ts: s3c_ts.c: Could not allocate ts IRQ_ADC !
s3c-ts: probe of s3c-ts failed with error -5
TS申請不到IRQ,被adc資源佔用了。
於是,找到arch/arm/plat-samsung/adc.c
ret = request_irq(adc->irq, s3c_adc_irq, 0, dev_name(dev), adc);改爲:
ret = request_irq(adc->irq, s3c_adc_irq, IRQF_SHARED, dev_name(dev), adc);//zxd
重新編譯啓動後顯示:
S3C Touchscreen driver, (c) 2008 Samsung Electronics
S3C TouchScreen got loaded successfully : 12 bits
input: S3C TouchScreen as /devices/virtual/input/input0
但是點擊觸摸屏的時候又會出現:
s3c_adc:s3c64xx_adc_irq:s3c-adc-irq:no adc pending的問題。
重新改回ret = request_irq(adc->irq, s3c_adc_irq, 0, dev_name(dev), adc);
配置內核,取消
System Type --->
[ ] ADC common driver support
再編譯下載,解決上面的問題。