linux2.6.22.6触摸屏移植到FL2440

/*linux2.6.22.6触摸屏移植到FL2440.txt*/
/*2011-3-21 -- 2011-3-22*/

 

Kernel version :2.6.22.6
Crosstool      :arm-linux-gcc-3.4.1
Board          :FL2440
System         :Ubuntu 10.10
Source         :regs-adc.h, ts.h, s3c2410_ts.c

1.cp regs-adc.h include/asm-arm/arch-s3c2410/regs-adc.h

/*regs-adc.h*/ #ifndef __ASM_ARCH_REGS_ADC_H #define __ASM_ARCH_REGS_ADC_H "regs-adc.h" #define S3C2410_ADCREG(x) (x) #define S3C2410_ADCCON S3C2410_ADCREG(0x00) #define S3C2410_ADCTSC S3C2410_ADCREG(0x04) #define S3C2410_ADCDLY S3C2410_ADCREG(0x08) #define S3C2410_ADCDAT0 S3C2410_ADCREG(0x0C) #define S3C2410_ADCDAT1 S3C2410_ADCREG(0x10) /* ADCCON Register Bits */ #define S3C2410_ADCCON_ECFLG (1<<15) #define S3C2410_ADCCON_PRSCEN (1<<14) #define S3C2410_ADCCON_PRSCVL(x) (((x)&0xFF)<<6) #define S3C2410_ADCCON_PRSCVLMASK (0xFF<<6) #define S3C2410_ADCCON_SELMUX(x) (((x)&0x7)<<3) #define S3C2410_ADCCON_MUXMASK (0x7<<3) #define S3C2410_ADCCON_STDBM (1<<2) #define S3C2410_ADCCON_READ_START (1<<1) #define S3C2410_ADCCON_ENABLE_START (1<<0) #define S3C2410_ADCCON_STARTMASK (0x3<<0) /* ADCTSC Register Bits */

2.cp ts.h include/asm-arm/arch-s3c2410/ts.h

/*ts.h*/ * * Copyright (c) 2005 Arnaud Patard <[email protected]> * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * * Changelog: * 24-Mar-2005 RTP Created file * 03-Aug-2005 RTP Renamed to ts.h */ #ifndef __ASM_ARM_TS_H #define __ASM_ARM_TS_H struct s3c2410_ts_mach_info { int delay; int presc; int oversampling_shift; }; void __init set_s3c2410ts_info(struct s3c2410_ts_mach_info *hard_s3c2410ts_info); #endif /* __ASM_ARM_TS_H */

3.cp s3c2410_ts.c drivers/input/touchscreen/s3c2440_ts.c

/*s3c2410_ts.c*/ /* By dean adapted from original driver of linux-2.6.13.4 for mini2440 */ #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/clk.h> #include <linux/platform_device.h> #include <asm/io.h> #include <asm/irq.h> #include <asm/arch/regs-adc.h> #include <asm/arch/regs-gpio.h> #include <asm/arch/ts.h> /* For ts.dev.id.version */ #define S3C2410TSVERSION 0x0101 #define TSC_SLEEP (S3C2410_ADCTSC_PULL_UP_DISABLE | S3C2410_ADCTSC_XY_PST(0)) #define WAIT4INT(x) (((x)<<8) | S3C2410_ADCTSC_YM_SEN | S3C2410_ADCTSC_YP_SEN | / S3C2410_ADCTSC_XP_SEN | S3C2410_ADCTSC_XY_PST(3)) #define AUTOPST (S3C2410_ADCTSC_YM_SEN | S3C2410_ADCTSC_YP_SEN | S3C2410_ADCTSC_XP_SEN |/ S3C2410_ADCTSC_AUTO_PST | S3C2410_ADCTSC_XY_PST(0)) #define DEBUG_LVL KERN_DEBUG MODULE_AUTHOR("Arnaud Patard <[email protected]>"); MODULE_DESCRIPTION("s3c2410 touchscreen driver"); MODULE_LICENSE("GPL"); /* * Definitions & global arrays. */ static char *s3c2410ts_name = "s3c2410 TouchScreen"; /* * Per-touchscreen data. */ struct s3c2410ts { struct input_dev *dev; long xp; long yp; int count; int shift; char phys[32]; }; static struct s3c2410ts ts; static void __iomem *base_addr; 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); } static void touch_timer_fire(unsigned long data) { unsigned long data0; unsigned long data1; int updown; //printk("touch_timer_fire 1:%d/n",updown); data0 = readl(base_addr+S3C2410_ADCDAT0); data1 = readl(base_addr+S3C2410_ADCDAT1); //printk("touch time fire: 2:data0:%d:data1:%d./n",data0,data1); updown = (!(data0 & S3C2410_ADCDAT0_UPDOWN)) && (!(data1 & S3C2410_ADCDAT0_UPDOWN)); //printk("touch_timer_fire 3:%d/n",updown); if (updown) { if (ts.count != 0) { long tmp; tmp = ts.xp; ts.xp = ts.yp; ts.yp = tmp; //printk("touch time fire:4:xp:%d:yp:%d./n",ts.xp,ts.yp); ts.xp >>= ts.shift; ts.yp >>= ts.shift; //printk("func 2"); #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 input_report_abs(ts.dev, ABS_X, ts.xp); input_report_abs(ts.dev, ABS_Y, ts.yp); //printk("touch time fire:reportsbs:xp:%d:yp:%d./n",ts.xp,ts.yp); input_report_key(ts.dev, BTN_TOUCH, 1); input_report_abs(ts.dev, ABS_PRESSURE, 1); input_sync(ts.dev); } ts.xp = 0; ts.yp = 0; ts.count = 0; //printk("func 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 { ts.count = 0; //printk("func 3"); input_report_key(ts.dev, BTN_TOUCH, 0); input_report_abs(ts.dev, ABS_PRESSURE, 0); input_sync(ts.dev); writel(WAIT4INT(0), base_addr+S3C2410_ADCTSC); } } static struct timer_list touch_timer = TIMER_INITIALIZER(touch_timer_fire, 0, 0); static irqreturn_t stylus_updown(int irq, void *dev_id) { unsigned long data0; unsigned long data1; int updown; data0 = readl(base_addr+S3C2410_ADCDAT0); data1 = readl(base_addr+S3C2410_ADCDAT1); updown = (!(data0 & S3C2410_ADCDAT0_UPDOWN)) && (!(data1 & S3C2410_ADCDAT0_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 (updown) touch_timer_fire(0); return IRQ_HANDLED; } static irqreturn_t stylus_action(int irq, void *dev_id) { //printk("action/n"); unsigned long data0; unsigned long data1; data0 = readl(base_addr+S3C2410_ADCDAT0); data1 = readl(base_addr+S3C2410_ADCDAT1); ts.xp += data0 & S3C2410_ADCDAT0_XPDATA_MASK; ts.yp += data1 & S3C2410_ADCDAT1_YPDATA_MASK; ts.count++; if (ts.count < (1<<ts.shift)) { 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); } return IRQ_HANDLED; } static struct clk *adc_clock; static int __init s3c2410ts_probe(struct platform_device *pdev) { int rc; struct s3c2410_ts_mach_info *info; struct input_dev *input_dev; info = ( struct s3c2410_ts_mach_info *)pdev->dev.platform_data; if (!info) { printk(KERN_ERR "Hm... too bad : no platform data for ts/n"); return -EINVAL; } #ifdef CONFIG_TOUCHSCREEN_S3C2410_DEBUG printk(DEBUG_LVL "Entering s3c2410ts_init/n"); #endif adc_clock = clk_get(NULL, "adc"); if (!adc_clock) { printk(KERN_ERR "failed to get adc clock source/n"); return -ENOENT; } clk_enable(adc_clock); #ifdef CONFIG_TOUCHSCREEN_S3C2410_DEBUG printk(DEBUG_LVL "got and enabled clock/n"); #endif base_addr=ioremap(S3C2410_PA_ADC,0x20); if (base_addr == NULL) { printk(KERN_ERR "Failed to remap register block/n"); return -ENOMEM; } /* Configure GPIOs */ s3c2410_ts_connect(); 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); /* Initialise registers */ if ((info->delay&0xffff) > 0) writel(info->delay & 0xffff, base_addr+S3C2410_ADCDLY); writel(WAIT4INT(0), base_addr+S3C2410_ADCTSC); /* Initialise input stuff */ memset(&ts, 0, sizeof(struct s3c2410ts)); input_dev = input_allocate_device(); if (!input_dev) { printk(KERN_ERR "Unable to allocate the input device !!/n"); return -ENOMEM; } sprintf(ts.phys, "ts0"); ts.dev=input_dev; ts.dev->evbit[0] = BIT(EV_SYN) | BIT(EV_KEY) | BIT(EV_ABS); ts.dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH); 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); ts.dev->name = s3c2410ts_name; ts.dev->id.bustype = BUS_RS232; ts.dev->id.vendor = 0xDEAD; ts.dev->id.product = 0xBEEF; ts.dev->id.version = S3C2410TSVERSION; ts.shift = info->oversampling_shift; /* Get irqs */ if (request_irq(IRQ_ADC, stylus_action,IRQF_SAMPLE_RANDOM, "s3c2410_action", ts.dev)) { printk(KERN_ERR "s3c2410_ts.c: Could not allocate ts IRQ_ADC !/n"); iounmap(base_addr); return -EIO; } if (request_irq(IRQ_TC, stylus_updown,IRQF_SAMPLE_RANDOM, "s3c2410_action", ts.dev)) { printk(KERN_ERR "s3c2410_ts.c: Could not allocate ts IRQ_TC !/n"); iounmap(base_addr); return -EIO; } printk(KERN_INFO "%s successfully loaded/n", s3c2410ts_name); /* All went ok, so register to the input system */ rc=input_register_device(ts.dev); if (rc) { free_irq(IRQ_TC, ts.dev); free_irq(IRQ_ADC, ts.dev); clk_disable(adc_clock); iounmap(base_addr); return -EIO; } return 0; } static int s3c2410ts_remove(struct platform_device *pdev) { disable_irq(IRQ_ADC); disable_irq(IRQ_TC); free_irq(IRQ_TC,ts.dev); free_irq(IRQ_ADC,ts.dev); if (adc_clock) { clk_disable(adc_clock); clk_put(adc_clock); adc_clock = NULL; } input_unregister_device(ts.dev); iounmap(base_addr); return 0; } #ifdef CONFIG_PM static int s3c2410ts_suspend(struct platform_device *pdev, pm_message_t state) { writel(TSC_SLEEP, base_addr+S3C2410_ADCTSC); writel(readl(base_addr+S3C2410_ADCCON) | S3C2410_ADCCON_STDBM,base_addr+S3C2410_ADCCON); disable_irq(IRQ_ADC); disable_irq(IRQ_TC); clk_disable(adc_clock); return 0; } static int s3c2410ts_resume(struct platform_device *pdev) { struct s3c2410_ts_mach_info *info = ( struct s3c2410_ts_mach_info *)pdev->dev.platform_data; clk_enable(adc_clock); msleep(1); enable_irq(IRQ_ADC); enable_irq(IRQ_TC); 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); /* Initialise registers */ if ((info->delay&0xffff) > 0) writel(info->delay & 0xffff, base_addr+S3C2410_ADCDLY); writel(WAIT4INT(0), base_addr+S3C2410_ADCTSC); return 0; } #else #define s3c2410ts_suspend NULL #define s3c2410ts_resume NULL #endif static struct platform_driver s3c2410ts_driver = { .driver ={ .name = "s3c2410-ts", .owner = THIS_MODULE, }, .probe = s3c2410ts_probe, .remove = s3c2410ts_remove, .suspend = s3c2410ts_suspend, .resume = s3c2410ts_resume, }; int __init s3c2410ts_init(void) { return platform_driver_register(&s3c2410ts_driver); } void __exit s3c2410ts_exit(void) { platform_driver_unregister(&s3c2410ts_driver); } module_init(s3c2410ts_init); module_exit(s3c2410ts_exit);
4.在drivers/input/touchscreen/Makefile中添加

obj-$(CONFIG_TOUCHSCREEN_S3C2410) += s3c2440_ts.o

 

5.在drivers/input/touchscreen/Kconfig中if INPUT_TOUCHSCREEN后加入：

config TOUCHSCREEN_S3C2410
tristate "Samsung S3C2410 touchscreen input driver"
depends on ARCH_S3C2410 && INPUT && INPUT_TOUCHSCREEN
select SERIO
help
   Say Y here if you have the s3c2410 touchscreen.
   If unsure, say N.
   To compile this driver as a module, choose M here: the
   module will be called s3c2410_ts.
config TOUCHSCREEN_S3C2410_DEBUG
boolean "Samsung S3C2410 touchscreen debug messages"
depends on TOUCHSCREEN_S3C2410
help
   Select this if you want debug messages

 

6.在arch/arm/mach-s3c2440/mach-smdk2440.c添加：

(1)#include <asm/arch/ts.h>

(2)struct s3c2410_ts_mach_info s3c2440_ts_cfg __initdata = {
        .delay =20000,
        .presc = 55,
        .oversampling_shift = 2,
};

(3)smdk2440_devices中添加红字部分:
static struct platform_device *smdk2440_devices[] __initdata = {
&s3c_device_usb,
&s3c_device_lcd,
&s3c_device_wdt,
&s3c_device_i2c,
&s3c_device_iis,
/* Mine dm9000 */
&s3c_device_dm9000,
/* Mine dm9000 end */
/* Mine ts */
&s3c_device_ts
/* Mine ts end */
};

(4)在smdk2440_map_io中添加s3c24xx_init_touchscreen(&s3c2440_ts_cfg):

static void __init smdk2440_map_io(void)
{
s3c24xx_init_touchscreen(&s3c2440_ts_cfg);
s3c24xx_init_io(smdk2440_iodesc, ARRAY_SIZE(smdk2440_iodesc));
s3c24xx_init_clocks(12000000);
s3c24xx_init_uarts(smdk2440_uartcfgs, ARRAY_SIZE(smdk2440_uartcfgs));
usb_sbc2410_init();
}

 

7.在arch/arm/plat-s3c24xx/devs.c 这里面我们加入（要在文件尾，至少要在s3c_adc_resource定义之后，因为我们要用到他。我的文件里，在这段之后仅有一行：#endif // CONFIG_CPU_S32440。也就是说我加在了最后一行的上面）：

(1)
  /* Touchscreen */
static struct s3c2410_ts_mach_info s3c2410_ts_info;
void __init s3c24xx_init_touchscreen(struct s3c2410_ts_mach_info *hard_s3c2410_ts_info)
{
  memcpy(&s3c2410_ts_info,hard_s3c2410_ts_info,sizeof(struct s3c2410_ts_mach_info));
}

//EXPORT_SYMBOL(set_s3c2410ts_info);
struct platform_device s3c_device_ts = {
  .name = "s3c2410-ts",
  .id = -1,
  .num_resources   = ARRAY_SIZE(s3c_adc_resource),
  .resource   = s3c_adc_resource,
  .dev = {
   .platform_data = &s3c2410_ts_info,
  }
};

EXPORT_SYMBOL(s3c_device_ts);
/* Mine ts end */

 

(2)加入头文件：

#include <asm/arch/ts.h>

 

8.vi include/asm/plat-s3c24xx/devs.h 加入：
extern struct platform_device s3c_device_ts;
void __init s3c24xx_init_touchscreen(struct s3c2410_ts_mach_info *hard_s3c2410_ts_info);

 

配置内核：
Device Drivers--->
    HID Devices --->
        USB HID Boot Protocol drivers --->
           <*>USB HIDBP Keyboard(simple Boot) support
           < >USB HIDBP Mouse(simple Boot) support
    Input device support--->
       (320) Horizontal screen resolution
       (240) Vertical screen resolution
       [*]Touchscreens--->
          <*> Samsung S3C2410 touchscreen input driver
           [*]   Samsung S3C2410 touchscreen debug messages
       <*> Touchscreen interface /* 选中这个会生成/dev/ts0 */
       (240) Horizontal screen resolution
       (320) vertical screen resolution

 

由于我的开发板是FL2440,直接用这样生成的内核启动QT2后造成了X,Y方向颠倒,因此做了如下修改:
在s3c2410_ts.c中找到如下两句:
input_report_abs(ts.dev, ABS_X, ts.xp);
input_report_abs(ts.dev, ABS_Y, ts.yp);
将此两句修改为如下:
input_report_abs(ts.dev, ABS_X, ts.yp);
input_report_abs(ts.dev, ABS_Y, ts.xp);

这样进去QT2重新校准后一切正常。

 

参考链接:
s3c2440触摸屏驱动分析:
http://blog.csdn.net/satanwxd/archive/2010/02/02/5279595.aspx
S3C2440上触摸屏驱动实例开发讲解:
http://blog.csdn.net/yangdelong/archive/2010/04/24/5520451.aspx
第五期 mini2440触摸屏驱动移植linux2.6.28内核（完成）:
http://www.usr.cc/thread-1467-1-1.html
『分析』mini2440基于2.6.28内核的触屏驱动分析:
http://www.usr.cc/thread-1477-1-3.html