X210触摸屏驱动分析

X210触摸屏驱动分析：

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这是一个platform驱动程序，需要在mach-x210.c中进行device定义注册。

由上图可见是直接编译进内核的，并不是模块！

这个涉及到了：输入子系统，字符设备，平台设备驱动

input_report_abs是输入子系统上报 “绝对坐标”

input_sync(ts->dev)是输入子系统结束（同步）上报

??? input_report_abs(ts->dev, ABS_Z, 0);  还有z是3D的吗还？还要只是0

set_bit(0,ts->dev->evbit) 这个是输入子系统中的 事件支持（设备驱动通过set_bit()告诉input子系统它支持哪些事件）

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 89 #define EV_SYN                  0x00 90 #define EV_KEY                  0x01 91 #define EV_REL                  0x02 92 #define EV_ABS                  0x03 93 #define EV_MSC                  0x04 94 #define EV_SW                   0x05 95 #define EV_LED                  0x11 96 #define EV_SND                  0x12 97 #define EV_REP                  0x14 98 #define EV_FF                   0x15 99 #define EV_PWR                  0x16100 #define EV_FF_STATUS            0x17101 #define EV_MAX                  0x1f102 #define EV_CNT                  (EV_MAX+1)

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platform_get_resource 是platform中 获取资源 （平台设备资源）

platform_get_resource的作用是什么呢？？？

包含的函数有：

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ts_filter_fixed    //滤波
touch_timer_fire  //定时器中断服务子程序
touch_timer      //使用时钟
stylus_updown   //TS中断服务子程序
stylus_action   //ADC转换完成中断
s3c_ts_get_platdata
s3c_ts_probe
s3c_ts_remove
s3c_ts_suspend
s3c_ts_resume
ts_early_suspend

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probe 探测

remove 清除

suspend 暂停

resume 恢复

shutdown 关闭

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参见：《linux内核input子系统解析》 《input_set_abs_params》

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/* linux/drivers/input/touchscreen/s3c-ts.c * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA    * * Copyright (c) 2004 Arnaud Patard <[e-mail]> * iPAQ H1940 touchscreen support * * ChangeLog * * 2004-09-05: Herbert Potzl <[e-mail]> *- added clock (de-)allocation code * * 2005-03-06: Arnaud Patard <[e-mail]> *      - h1940_ -> s3c24xx (this driver is now also used on the n30 *        machines :P) *      - Debug messages are now enabled with the config option *        TOUCHSCREEN_S3C_DEBUG *      - Changed the way the value are read *      - Input subsystem should now work *      - Use ioremap and readl/writel * * 2005-03-23: Arnaud Patard <[e-mail]> *      - Make use of some undocumented features of the touchscreen *        controller * * 2006-09-05: Ryu Euiyoul <[e-mail]> *      - added power management suspend and resume code * */#include <linux/errno.h>#include <linux/kernel.h>#include <linux/module.h>#include <linux/slab.h>#include <linux/input.h>#include <linux/init.h>#include <linux/serio.h>#include <linux/delay.h>#include <linux/platform_device.h>#include <linux/clk.h>#ifdef CONFIG_HAS_EARLYSUSPEND#include <linux/earlysuspend.h>#endif /* CONFIG_HAS_EARLYSUSPEND */#include <asm/io.h>#include <asm/irq.h>#include <mach/hardware.h>#include <mach/regs-adc.h>#include <mach/ts-s3c.h>#include <mach/irqs.h>#define CONFIG_TOUCHSCREEN_S3C_DEBUG#undef CONFIG_TOUCHSCREEN_S3C_DEBUG#define        X_COOR_MIN      180#define        X_COOR_MAX      4000#define        X_COOR_FUZZ     32#define        Y_COOR_MIN      300#define        Y_COOR_MAX      3900#define        Y_COOR_FUZZ     30/* For ts->dev.id.version */#define S3C_TSVERSION0x0101#define WAIT4INT(x)  (((x)<<8) | \     S3C_ADCTSC_YM_SEN | S3C_ADCTSC_YP_SEN | S3C_ADCTSC_XP_SEN | \     S3C_ADCTSC_XY_PST(3))#define AUTOPST     (S3C_ADCTSC_YM_SEN | S3C_ADCTSC_YP_SEN | S3C_ADCTSC_XP_SEN | \     S3C_ADCTSC_AUTO_PST | S3C_ADCTSC_XY_PST(0))#define DEBUG_LVL    KERN_DEBUG#ifdef CONFIG_HAS_EARLYSUSPENDvoid ts_early_suspend(struct early_suspend *h);void ts_late_resume(struct early_suspend *h);#endif /* CONFIG_HAS_EARLYSUSPEND */#define LCD0701#define LCD0432#define LCD1013//#define LCD_MODELCD043#define LCD_MODELCD070//#define LCD_MODELCD101#define CALIBRATE_FILE"/data/pointercal" //lxg added./* Touchscreen default configuration */struct s3c_ts_mach_info s3c_ts_default_cfg __initdata = {.delay =10000,.presc = 49,.oversampling_shift = 2,.resol_bit = 10};/* * Definitions & global arrays. */static char *s3c_ts_name = "S5P TouchScreen";static void __iomem *ts_base;static struct resource*ts_mem;static struct resource*ts_irq;static struct clk*ts_clock;static struct s3c_ts_info *ts;int calibrate_para[7] = {0, 1, 0, 0, 0, 1, 1}; //lxg added.static int ts_filter_fixed(unsigned int * buf){//printk("**********buf[0]=%d,buf[1]=%d***********\n",buf[0],buf[1]);#if(LCD_MODE==LCD043)#define XMIN500#define XMAX 15500#define YMIN 2000#define YMAX 14700buf[0] = (buf[0] - XMIN) * 480 / (XMAX - XMIN);buf[1] = (buf[1] - YMIN) * 272 / (YMAX - YMIN);#elif(LCD_MODE==LCD070)#define XMIN400#define XMAX 15800#define YMIN 1350#define YMAX 14800buf[0] = (buf[0] - XMIN) * 800 / (XMAX - XMIN);buf[1] = (buf[1] - YMIN) * 480 / (YMAX - YMIN);#else//LCD101#define XMIN360#define XMAX 15300#define YMIN 1110#define YMAX 14900buf[0] = (buf[0] - XMIN) * 1024 / (XMAX - XMIN);buf[1] = (buf[1] - YMIN) * 600 / (YMAX - YMIN);#endifreturn 1;}static void touch_timer_fire(unsigned long data){unsigned long data0;unsigned long data1;int updown;        bool skip = false;int x,y;//int a0,a1,a2,a3,a4,a5,a6;int buf[3];//printk(KERN_ERR"calibrate para: %d %d %d %d %d %d %d \n", calibrate_para[0], calibrate_para[1], calibrate_para[2], calibrate_para[3], calibrate_para[4], calibrate_para[5], calibrate_para[6]);data0 = readl(ts_base+S3C_ADCDAT0);data1 = readl(ts_base+S3C_ADCDAT1);updown = (!(data0 & S3C_ADCDAT0_UPDOWN)) && (!(data1 & S3C_ADCDAT1_UPDOWN));if (updown){if (ts->count){#ifdef CONFIG_TOUCHSCREEN_S3C_DEBUGstruct timeval tv;do_gettimeofday(&tv);//printk(KERN_INFO "T: %06d, X: %03ld, Y: %03ld\n", (int)tv.tv_usec, ts->xp, ts->yp);#endif#ifdef CONFIG_ANDROID#if 1buf[1] = ts->xp;buf[2] = ts->yp;ts_filter_fixed(&buf[1]);ts->xp = buf[1];ts->yp = buf[2];//printk("Convert before: Cordinates x=%d, y=%d\n",(int)ts->xp,(int)ts->yp);x=(int) ts->xp;y=(int) ts->yp;ts->xp=(long) ((calibrate_para[0]+(calibrate_para[1]*x)+(calibrate_para[2]*y))/calibrate_para[6]);ts->yp=(long) ((calibrate_para[3]+(calibrate_para[4]*x)+(calibrate_para[5]*y))/calibrate_para[6]);#elsebuf[1] = ts->xp;buf[2] = ts->yp;ts_filter_fixed(&buf[1]);ts->xp = buf[1];ts->yp = buf[2];#endif//printk("Cordinates x=%d, y=%d\n",(int)ts->xp,(int)ts->yp);            skip = false;//ts->yp = 4000 - ts->yp;            if ((ts->xp_old != 0) && (ts->yp_old != 0) &&                ((abs(ts->xp - ts->xp_old) > 100) || (abs(ts->yp - ts->yp_old) > 50)))            {                skip = true;            }            if ((ts->xp != ts->xp_old || ts->yp != ts->yp_old) && !skip)    {                input_report_abs(ts->dev, ABS_X, ts->xp);    input_report_abs(ts->dev, ABS_Y, ts->yp);    input_report_abs(ts->dev, ABS_Z, 0);    input_report_key(ts->dev, BTN_TOUCH, 1);    input_sync(ts->dev);                ts->xp_old = ts->xp;                ts->yp_old = ts->yp;                //printk("report x=%d, y=%d\n",(int)ts->xp,(int)ts->yp);             }#else /* CONFIG_ANDROID */input_report_abs(ts->dev, ABS_X, ts->xp);input_report_abs(ts->dev, ABS_Y, ts->yp);input_report_key(ts->dev, BTN_TOUCH, 1);input_report_abs(ts->dev, ABS_PRESSURE, 1);input_sync(ts->dev);#endif /* CONFIG_ANDROID */}        ts->xp_old = ts->xp;        ts->yp_old = ts->yp;ts->xp = 0;ts->yp = 0;ts->count = 0;writel(S3C_ADCTSC_PULL_UP_DISABLE | AUTOPST, ts_base+S3C_ADCTSC);writel(readl(ts_base+S3C_ADCCON) | S3C_ADCCON_ENABLE_START, ts_base+S3C_ADCCON);} else {ts->count = 0;#ifdef CONFIG_ANDROIDinput_report_abs(ts->dev, ABS_X, ts->xp);input_report_abs(ts->dev, ABS_Y, ts->yp);input_report_abs(ts->dev, ABS_Z, 0);#endif /* CONFIG_ANDROID */input_report_key(ts->dev, BTN_TOUCH, 0);#ifndef CONFIG_ANDROIDinput_report_abs(ts->dev, ABS_PRESSURE, 0);#endif /* !CONFIG_ANDROID */input_sync(ts->dev);writel(WAIT4INT(0), ts_base+S3C_ADCTSC);}}static struct timer_list touch_timer =TIMER_INITIALIZER(touch_timer_fire, 0, 0);static irqreturn_t stylus_updown(int irqno, void *param){unsigned long data0;unsigned long data1;int updown;data0 = readl(ts_base+S3C_ADCDAT0);data1 = readl(ts_base+S3C_ADCDAT1);updown = (!(data0 & S3C_ADCDAT0_UPDOWN)) && (!(data1 & S3C_ADCDAT1_UPDOWN));#ifdef CONFIG_TOUCHSCREEN_S3C_DEBUG       printk(KERN_INFO "   %c\n",updown ? 'D' : 'U');#endif/* TODO we should never get an interrupt with updown set while * the timer is running, but maybe we ought to verify that the * timer isn't running anyways. */if (updown)touch_timer_fire(0);if (ts->s3c_adc_con == ADC_TYPE_2) {__raw_writel(0x0, ts_base+S3C_ADCCLRWK);__raw_writel(0x0, ts_base+S3C_ADCCLRINT);}return IRQ_HANDLED;}static irqreturn_t stylus_action(int irqno, void *param){unsigned long data0;unsigned long data1;data0 = readl(ts_base+S3C_ADCDAT0);data1 = readl(ts_base+S3C_ADCDAT1);//printk("calicate: x=%d, y=%d\r\n", data0&0xfff, data1&0xfff);#if(LCD_MODE==LCD043)if (ts->resol_bit == 12){ts->xp += S3C_ADCDAT0_XPDATA_MASK_12BIT - (data1 & S3C_ADCDAT0_XPDATA_MASK_12BIT);ts->yp += (data0 & S3C_ADCDAT1_YPDATA_MASK_12BIT);}else{ts->xp += S3C_ADCDAT0_XPDATA_MASK - (data0 & S3C_ADCDAT0_XPDATA_MASK);ts->yp += S3C_ADCDAT1_YPDATA_MASK - (data1 & S3C_ADCDAT1_YPDATA_MASK);}#elif(LCD_MODE==LCD070)if (ts->resol_bit == 12){/*//TP X,Y轴选择，根据实际情况确定ts->xp += S3C_ADCDAT0_XPDATA_MASK_12BIT - (data0 & S3C_ADCDAT0_XPDATA_MASK_12BIT);ts->yp += (data1 & S3C_ADCDAT1_YPDATA_MASK_12BIT);*/ts->xp += S3C_ADCDAT0_XPDATA_MASK_12BIT - (data1 & S3C_ADCDAT0_XPDATA_MASK_12BIT);ts->yp += S3C_ADCDAT1_YPDATA_MASK_12BIT - (data0 & S3C_ADCDAT1_YPDATA_MASK_12BIT);}else{ts->xp += S3C_ADCDAT0_XPDATA_MASK - (data0 & S3C_ADCDAT0_XPDATA_MASK);ts->yp += S3C_ADCDAT1_YPDATA_MASK - (data1 & S3C_ADCDAT1_YPDATA_MASK);}#else//LCD101if (ts->resol_bit == 12){ts->xp += (data0 & S3C_ADCDAT0_XPDATA_MASK_12BIT);ts->yp += S3C_ADCDAT1_YPDATA_MASK_12BIT - (data1 & S3C_ADCDAT1_YPDATA_MASK_12BIT);}else{ts->xp += S3C_ADCDAT0_XPDATA_MASK - (data0 & S3C_ADCDAT0_XPDATA_MASK);ts->yp += S3C_ADCDAT1_YPDATA_MASK - (data1 & S3C_ADCDAT1_YPDATA_MASK);}#endifts->count++;if (ts->count < (1<<ts->shift)) {writel(S3C_ADCTSC_PULL_UP_DISABLE | AUTOPST, ts_base+S3C_ADCTSC);writel(readl(ts_base+S3C_ADCCON) | S3C_ADCCON_ENABLE_START, ts_base+S3C_ADCCON);} else {mod_timer(&touch_timer, jiffies+1);writel(WAIT4INT(1), ts_base+S3C_ADCTSC);}if (ts->s3c_adc_con == ADC_TYPE_2) {__raw_writel(0x0, ts_base+S3C_ADCCLRWK);__raw_writel(0x0, ts_base+S3C_ADCCLRINT);}return IRQ_HANDLED;}static struct s3c_ts_mach_info *s3c_ts_get_platdata(struct device *dev){if (dev->platform_data != NULL)return (struct s3c_ts_mach_info *)dev->platform_data;return &s3c_ts_default_cfg;}static volatile unsigned int *g_adc_base = NULL;#define TOUCH_SCREEN1 0x1#define TSSEL 17/* * The functions for inserting/removing us as a module. */static int __init s3c_ts_probe(struct platform_device *pdev){struct resource *res;struct device *dev;struct input_dev *input_dev;struct s3c_ts_mach_info *s3c_ts_cfg;int ret, size;int irq_flags = 0;dev = &pdev->dev;res = platform_get_resource(pdev, IORESOURCE_MEM, 0);if (res == NULL) {dev_err(dev, "no memory resource specified\n");return -ENOENT;}size = (res->end - res->start) + 1;ts_mem = request_mem_region(res->start, size, pdev->name);if (ts_mem == NULL) {dev_err(dev, "failed to get memory region\n");ret = -ENOENT;goto err_req;}ts_base = ioremap(res->start, size);if (ts_base == NULL) {dev_err(dev, "failed to ioremap() region\n");ret = -EINVAL;goto err_map;}ts_clock = clk_get(&pdev->dev, "adc");if (IS_ERR(ts_clock)) {dev_err(dev, "failed to find watchdog clock source\n");ret = PTR_ERR(ts_clock);goto err_clk;}clk_enable(ts_clock);g_adc_base = ioremap(0xE1700000, 4);printk("1adccon0=%#x\n", readl(g_adc_base));writel(readl(g_adc_base) | (TOUCH_SCREEN1 << TSSEL) , g_adc_base );printk("2adccon0=%#x\n", readl(g_adc_base));s3c_ts_cfg = s3c_ts_get_platdata(&pdev->dev);if ((s3c_ts_cfg->presc&0xff) > 0)writel(S3C_ADCCON_PRSCEN | S3C_ADCCON_PRSCVL(s3c_ts_cfg->presc&0xFF),\ts_base+S3C_ADCCON);elsewritel(0, ts_base+S3C_ADCCON);/* Initialise registers */if ((s3c_ts_cfg->delay&0xffff) > 0)writel(s3c_ts_cfg->delay & 0xffff, ts_base+S3C_ADCDLY);if (s3c_ts_cfg->resol_bit == 12) {switch (s3c_ts_cfg->s3c_adc_con) {case ADC_TYPE_2:writel(readl(ts_base+S3C_ADCCON)|S3C_ADCCON_RESSEL_12BIT, ts_base+S3C_ADCCON);break;case ADC_TYPE_1:writel(readl(ts_base+S3C_ADCCON)|S3C_ADCCON_RESSEL_12BIT_1, ts_base+S3C_ADCCON);break;default:dev_err(dev, "Touchscreen over this type of AP isn't supported !\n");break;}}writel(WAIT4INT(0), ts_base+S3C_ADCTSC);ts = kzalloc(sizeof(struct s3c_ts_info), GFP_KERNEL);input_dev = input_allocate_device();if (!input_dev) {ret = -ENOMEM;goto err_alloc;}ts->dev = input_dev;ts->dev->evbit[0] = ts->dev->evbit[0] = BIT_MASK(EV_SYN) | BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);ts->dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);if (s3c_ts_cfg->resol_bit==12) {#ifdef /*CONFIG_ANDROID*/liuqiming  //lqm changed.input_set_abs_params(ts->dev, ABS_X, X_COOR_MIN, X_COOR_MAX, X_COOR_FUZZ, 0);input_set_abs_params(ts->dev, ABS_Y, Y_COOR_MIN, Y_COOR_MAX, Y_COOR_FUZZ, 0);        //input_set_abs_params(ts->dev, ABS_Z, 0, 0, 0, 0);        set_bit(0,ts->dev->evbit);        set_bit(1,ts->dev->evbit);        set_bit(2,ts->dev->evbit);        set_bit(3,ts->dev->evbit);        set_bit(5,ts->dev->evbit);        set_bit(0,ts->dev->relbit);        set_bit(1,ts->dev->relbit);        set_bit(0,ts->dev->absbit);        set_bit(1,ts->dev->absbit);        set_bit(2,ts->dev->absbit);        set_bit(0,ts->dev->swbit);        //for(err=0;err<512;err++) set_bit(err,ts->dev->keybit);        input_event(ts->dev,5,0,1);#else /* CONFIG_ANDROID */#if(LCD_MODE==LCD043)input_set_abs_params(ts->dev, ABS_X, 0, 480, 0, 0);input_set_abs_params(ts->dev, ABS_Y, 0, 272, 0, 0);#elif(LCD_MODE==LCD070)input_set_abs_params(ts->dev, ABS_X, 0, 800, 0, 0);input_set_abs_params(ts->dev, ABS_Y, 0, 480, 0, 0);#else//LCD101input_set_abs_params(ts->dev, ABS_X, 0, 1024, 0, 0);input_set_abs_params(ts->dev, ABS_Y, 0, 600, 0, 0);#endif#endif /* CONFIG_ANDROID */}else{input_set_abs_params(ts->dev, ABS_X, 0, 0x3FF, 0, 0);input_set_abs_params(ts->dev, ABS_Y, 0, 0x3FF, 0, 0);}input_set_abs_params(ts->dev, ABS_PRESSURE, 0, 1, 0, 0);sprintf(ts->phys, "input(ts)");ts->dev->name = s3c_ts_name;ts->dev->phys = ts->phys;ts->dev->id.bustype = BUS_RS232;ts->dev->id.vendor = 0xDEAD;ts->dev->id.product = 0xBEEF;ts->dev->id.version = S3C_TSVERSION;ts->shift = s3c_ts_cfg->oversampling_shift;ts->resol_bit = s3c_ts_cfg->resol_bit;ts->s3c_adc_con = s3c_ts_cfg->s3c_adc_con;#ifdef CONFIG_HAS_EARLYSUSPENDts->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 1;ts->early_suspend.suspend = ts_early_suspend;ts->early_suspend.resume =ts_late_resume;register_early_suspend(&ts->early_suspend);#endif /* CONFIG_HAS_EARLYSUSPEND *//* For IRQ_PENDUP *//**platform_get_resource：平台设备注册*/ts_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);if (ts_irq == NULL) {dev_err(dev, "no irq resource specified\n");ret = -ENOENT;goto err_irq;}ret = request_irq(ts_irq->start, stylus_updown, irq_flags, "s3c_updown", ts);if (ret != 0) {dev_err(dev, "s3c_ts.c: Could not allocate ts IRQ_PENDN !\n");ret = -EIO;goto err_irq;}/* For IRQ_ADC */ts_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 1);if (ts_irq == NULL) {dev_err(dev, "no irq resource specified\n");ret = -ENOENT;goto err_irq;}ret = request_irq(ts_irq->start, stylus_action, irq_flags, "s3c_action", ts);if (ret != 0) {dev_err(dev, "s3c_ts.c: Could not allocate ts IRQ_ADC !\n");ret =  -EIO;goto err_irq;}printk(KERN_INFO "%s got loaded successfully : %d bits\n", s3c_ts_name, s3c_ts_cfg->resol_bit);/* All went ok, so register to the input system */ret = input_register_device(ts->dev);if (ret) {dev_err(dev, "s3c_ts.c: Could not register input device(touchscreen)!\n");ret = -EIO;goto fail;}return 0;fail:free_irq(ts_irq->start, ts->dev);free_irq(ts_irq->end, ts->dev);err_irq:input_free_device(input_dev);kfree(ts);err_alloc:clk_disable(ts_clock);clk_put(ts_clock);err_clk:iounmap(ts_base);err_map:release_resource(ts_mem);kfree(ts_mem);err_req:return ret;}static int s3c_ts_remove(struct platform_device *dev){printk(KERN_INFO "s3c_ts_remove() of TS called !\n");disable_irq(IRQ_ADC);disable_irq(IRQ_PENDN);free_irq(IRQ_PENDN, ts->dev);free_irq(IRQ_ADC, ts->dev);if (ts_clock) {clk_disable(ts_clock);clk_put(ts_clock);ts_clock = NULL;}#ifdef CONFIG_HAS_EARLYSUSPEND     unregister_early_suspend(&ts->early_suspend);#endif /* CONFIG_HAS_EARLYSUSPEND */input_unregister_device(ts->dev);iounmap(ts_base);return 0;}#ifdef CONFIG_PMstatic unsigned int adccon, adctsc, adcdly;static int s3c_ts_suspend(struct platform_device *dev, pm_message_t state){adccon = readl(ts_base+S3C_ADCCON);adctsc = readl(ts_base+S3C_ADCTSC);adcdly = readl(ts_base+S3C_ADCDLY);disable_irq(IRQ_ADC);disable_irq(IRQ_PENDN);clk_disable(ts_clock);return 0;}static int s3c_ts_resume(struct platform_device *pdev){clk_enable(ts_clock);writel(adccon, ts_base+S3C_ADCCON);writel(adctsc, ts_base+S3C_ADCTSC);writel(adcdly, ts_base+S3C_ADCDLY);writel(WAIT4INT(0), ts_base+S3C_ADCTSC);enable_irq(IRQ_ADC);enable_irq(IRQ_PENDN);return 0;}#else#define s3c_ts_suspend NULL#define s3c_ts_resume  NULL#endif#ifdef CONFIG_HAS_EARLYSUSPENDvoid ts_early_suspend(struct early_suspend *h){struct s3c_ts_info *ts;ts = container_of(h, struct s3c_ts_info, early_suspend);s3c_ts_suspend(NULL, PMSG_SUSPEND); // platform_device is now used}void ts_late_resume(struct early_suspend *h){struct s3c_ts_info *ts;ts = container_of(h, struct s3c_ts_info, early_suspend);s3c_ts_resume(NULL); // platform_device is now used}#endif /* CONFIG_HAS_EARLYSUSPEND *//**platform_driver是 平台驱动描述*/static struct platform_driver s3c_ts_driver = {       .probe          = s3c_ts_probe,       .remove         = s3c_ts_remove,       .suspend        = s3c_ts_suspend,       .resume         = s3c_ts_resume,       .driver= {.owner= THIS_MODULE,.name= "s3c-ts",},};static char banner[] __initdata = KERN_INFO "S5P Touchscreen driver, (c) 2008 Samsung Electronics\n";/**platform_driver_register 平台驱动注册*/static int __init s3c_ts_init(void){printk(banner);return platform_driver_register(&s3c_ts_driver);}static void __exit s3c_ts_exit(void){platform_driver_unregister(&s3c_ts_driver);}module_init(s3c_ts_init);module_exit(s3c_ts_exit);EXPORT_SYMBOL(calibrate_para);MODULE_AUTHOR("Samsung AP");MODULE_DESCRIPTION("S5P touchscreen driver");MODULE_LICENSE("GPL");

if(ts->s3c_adc_con==ADC_TYPE_2) {__raw_writel(0x0, ts_base+S3C_ADCCLRWK);__raw_writel(0x0, ts_base+S3C_ADCCLRINT);}

其中有如下定义：

#define S3C_ADCCLRINT   S3C_ADCREG(0x18)

#define S3C_ADCCLRWK   S3C_ADCREG(0x20)

直接看图：