移植文档.txt

包含触摸屏驱动源码(for s3c2410)以及触摸屏驱动,USB键盘鼠标移植详细步骤,tslib触摸屏校准程序的移植使用,包括错误解决方法.

触摸屏驱动移植

一、添加文件

1、将s3c2410_ts.c文件拷贝到drivers/input/touchscreen/目录下，其内容为：

/*

* 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 

* iPAQ H1940 touchscreen support

*

* ChangeLog

*

* 2004-09-05: Herbert P????tzl 

* - added clock (de-)allocation code

*

* 2005-03-06: Arnaud Patard 

* - h1940_ -> s3c2410 (this driver is now also used on the n30

* machines :P)

* - Debug messages are now enabled with the config option

* TOUCHSCREEN_S3C2410_DEBUG

* - Changed the way the value are read

* - Input subsystem should now work

* - Use ioremap and readl/writel

*

* 2005-03-23: Arnaud Patard 

* - Make use of some undocumented features of the touchscreen

* controller

*

*/

<!--[if !supportEmptyParas]--> <!--[endif]-->

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

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#include 

#include 

#include 

#include 

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/* For ts.dev.id.version */

#define S3C2410TSVERSION 0x0101

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#define WAIT4INT(x) (((x)<<8) | \

S3C2410_ADCTSC_YM_SEN | S3C2410_ADCTSC_YP_SEN | S3C2410_ADCTSC_XP_SEN | \

S3C2410_ADCTSC_XY_PST(3))

<!--[if !supportEmptyParas]--> <!--[endif]-->

#define AUTOPST (S3C2410_ADCTSC_YM_SEN | S3C2410_ADCTSC_YP_SEN | S3C2410_ADCTSC_XP_SEN | \

S3C2410_ADCTSC_AUTO_PST | S3C2410_ADCTSC_XY_PST(0))

<!--[if !supportEmptyParas]--> <!--[endif]-->

//#define DEBUG_LVL KERN_DEBUG

#define DEBUG_LVL KERN_ALERT

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MODULE_AUTHOR("Arnaud Patard ");

MODULE_DESCRIPTION("s3c2410 touchscreen driver");

MODULE_LICENSE("GPL");

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/*

* Definitions & global arrays.

*/

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<!--[if !supportEmptyParas]--> <!--[endif]-->

static char *s3c2410ts_name = "s3c2410 TouchScreen";

<!--[if !supportEmptyParas]--> <!--[endif]-->

/*

* Per-touchscreen data.

*/

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struct s3c2410ts {

struct input_dev dev;

long xp;

long yp;

int count;

int shift;

char phys[32];

};

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static struct s3c2410ts ts;

static void __iomem *base_addr;

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static inline void s3c2410_ts_connect(void)

{

s3c2410_gpio_cfgpin(S3C2410_GPG12, S3C2410_GPG12_XMON);

s3c2410_gpio_cfgpin(S3C2410_GPG13, S3C2410_GPG13_nXPON);

s3c2410_gpio_cfgpin(S3C2410_GPG14, S3C2410_GPG14_YMON);

s3c2410_gpio_cfgpin(S3C2410_GPG15, S3C2410_GPG15_nYPON);

}

<!--[if !supportEmptyParas]--> <!--[endif]-->

static void touch_timer_fire(unsigned long data)

{

unsigned long data0;

unsigned long data1;

int updown;

<!--[if !supportEmptyParas]--> <!--[endif]-->

data0 = readl(base_addr+S3C2410_ADCDAT0);

data1 = readl(base_addr+S3C2410_ADCDAT1);

if (updown) {

if (ts.count != 0) {

ts.xp >>= ts.shift;

ts.yp >>= ts.shift;

<!--[if !supportEmptyParas]--> <!--[endif]-->

#ifdef CONFIG_TOUCHSCREEN_S3C2410_DEBUG

{

struct timeval tv;

do_gettimeofday(&tv);

printk(DEBUG_LVL "T: %06d, X: %03ld, Y: %03ld\n", (int)tv.tv_usec, ts.xp, ts.yp);

}

#endif

<!--[if !supportEmptyParas]--> <!--[endif]-->

input_report_abs(&ts.dev, ABS_X, ts.xp);

input_report_abs(&ts.dev, ABS_Y, ts.yp);

<!--[if !supportEmptyParas]--> <!--[endif]-->

input_report_key(&ts.dev, BTN_TOUCH, 1);

input_report_abs(&ts.dev, ABS_PRESSURE, 1);

input_sync(&ts.dev);

}

<!--[if !supportEmptyParas]--> <!--[endif]-->

ts.xp = 0;

ts.yp = 0;

ts.count = 0;

<!--[if !supportEmptyParas]--> <!--[endif]-->

writel(S3C2410_ADCTSC_PULL_UP_DISABLE | AUTOPST, base_addr+S3C2410_ADCTSC);

writel(readl(base_addr+S3C2410_ADCCON) | S3C2410_ADCCON_ENABLE_START, base_addr+S3C2410_ADCCON);

} else {

ts.count = 0;

<!--[if !supportEmptyParas]--> <!--[endif]-->

input_report_key(&ts.dev, BTN_TOUCH, 0);

input_report_abs(&ts.dev, ABS_PRESSURE, 0);

input_sync(&ts.dev);

<!--[if !supportEmptyParas]--> <!--[endif]-->

writel(WAIT4INT(0), base_addr+S3C2410_ADCTSC);

}

}

<!--[if !supportEmptyParas]--> <!--[endif]-->

static struct timer_list touch_timer =

TIMER_INITIALIZER(touch_timer_fire, 0, 0);

<!--[if !supportEmptyParas]--> <!--[endif]-->

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

{

unsigned long data0;

unsigned long data1;

int updown;

<!--[if !supportEmptyParas]--> <!--[endif]-->

data0 = readl(base_addr+S3C2410_ADCDAT0);

data1 = readl(base_addr+S3C2410_ADCDAT1);


updown = (!(data0 & S3C2410_ADCDAT0_UPDOWN)) && (!(data1 & S3C2410_ADCDAT1_UPDOWN));

/* 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 !supportEmptyParas]--> <!--[endif]-->

if (updown)

touch_timer_fire(0);

<!--[if !supportEmptyParas]--> <!--[endif]-->

return IRQ_HANDLED;

}

<!--[if !supportEmptyParas]--> <!--[endif]-->

<!--[if !supportEmptyParas]--> <!--[endif]-->

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

{

unsigned long data0;

unsigned long data1;

<!--[if !supportEmptyParas]--> <!--[endif]-->

data0 = readl(base_addr+S3C2410_ADCDAT0);

data1 = readl(base_addr+S3C2410_ADCDAT1);

<!--[if !supportEmptyParas]--> <!--[endif]-->

ts.xp += data0 & S3C2410_ADCDAT0_XPDATA_MASK;

ts.yp += data1 & S3C2410_ADCDAT1_YPDATA_MASK;

ts.count++;

if (ts.count < (1<

writel(S3C2410_ADCTSC_PULL_UP_DISABLE | AUTOPST, base_addr+S3C2410_ADCTSC);

writel(readl(base_addr+S3C2410_ADCCON) | S3C2410_ADCCON_ENABLE_START, base_addr+S3C2410_ADCCON);

} else {

mod_timer(&touch_timer, jiffies+1);

writel(WAIT4INT(1), base_addr+S3C2410_ADCTSC);

}

<!--[if !supportEmptyParas]--> <!--[endif]-->

return IRQ_HANDLED;

}

<!--[if !supportEmptyParas]--> <!--[endif]-->

static struct clk *adc_clock;

<!--[if !supportEmptyParas]--> <!--[endif]-->

/*

* The functions for inserting/removing us as a module.

*/

<!--[if !supportEmptyParas]--> <!--[endif]-->

static int __init s3c2410ts_probe(struct device *dev)

{

struct s3c2410_ts_mach_info *info;

<!--[if !supportEmptyParas]--> <!--[endif]-->

info = ( struct s3c2410_ts_mach_info *)dev->platform_data;

<!--[if !supportEmptyParas]--> <!--[endif]-->

if (!info)

{

printk(KERN_ERR "Hm... too bad : no platform data for ts\n");

return -EINVAL;

}

<!--[if !supportEmptyParas]--> <!--[endif]-->

#ifdef CONFIG_TOUCHSCREEN_S3C2410_DEBUG

printk(DEBUG_LVL "Entering s3c2410ts_init\n");

#endif

<!--[if !supportEmptyParas]--> <!--[endif]-->

adc_clock = clk_get(NULL, "adc");

if (!adc_clock) {

printk(KERN_ERR "failed to get adc clock source\n");

return -ENOENT;

}

clk_use(adc_clock);

clk_enable(adc_clock);

<!--[if !supportEmptyParas]--> <!--[endif]-->

#ifdef CONFIG_TOUCHSCREEN_S3C2410_DEBUG

printk(DEBUG_LVL "got and enabled clock\n");

#endif

<!--[if !supportEmptyParas]--> <!--[endif]-->

base_addr=ioremap(S3C2410_PA_ADC,0x20);

if (base_addr == NULL) {

printk(KERN_ERR "Failed to remap register block\n");

return -ENOMEM;

}

<!--[if !supportEmptyParas]--> <!--[endif]-->

<!--[if !supportEmptyParas]--> <!--[endif]-->

/* Configure GPIOs */

s3c2410_ts_connect();

<!--[if !supportEmptyParas]--> <!--[endif]-->

if ((info->presc&0xff) > 0)

writel(S3C2410_ADCCON_PRSCEN | S3C2410_ADCCON_PRSCVL(info->presc&0xFF),\

base_addr+S3C2410_ADCCON);

else

writel(0,base_addr+S3C2410_ADCCON);

<!--[if !supportEmptyParas]--> <!--[endif]-->