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📄 触摸屏驱动移植 - 中国电子前沿--嵌入式咨询网站平台，嵌入式系统,单片机,dsp,arm,eda,fpga,nios ii,linux,unix,wince,vxwork,uc-os,开发板,测试测量,元器件,电源,微电子,半导体.htm

📁 S3C44B0x下的ADS7843触摸屏驱动资料与代码
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            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN 
            lang=EN-US><SPAN></SPAN><SPAN></SPAN>writel(WAIT4INT(0), 
            base_addr+S3C2410_ADCTSC);</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>}</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>}</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>static struct timer_list 
            touch_timer =</SPAN></P>
            <P class=MsoNormal><SPAN 
            lang=EN-US><SPAN></SPAN><SPAN></SPAN>TIMER_INITIALIZER(touch_timer_fire, 
            0, 0);</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>static irqreturn_t 
            stylus_updown(int irq, void *dev_id, struct pt_regs 
*regs)</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>{</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>unsigned long 
            data0;</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>unsigned long 
            data1;</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>int 
            updown;</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>data0 = 
            readl(base_addr+S3C2410_ADCDAT0);</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>data1 = 
            readl(base_addr+S3C2410_ADCDAT1);</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>updown = (!(data0 
            &amp; S3C2410_ADCDAT0_UPDOWN)) &amp;&amp; (!(data1 &amp; 
            S3C2410_ADCDAT1_UPDOWN));</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>/* TODO we should 
            never get an interrupt with updown set while</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN><SPAN></SPAN>* the 
            timer is running, but maybe we ought to verify that the</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN><SPAN></SPAN>* 
            timer isn't running anyways. */</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>if 
            (updown)</SPAN></P>
            <P class=MsoNormal><SPAN 
            lang=EN-US><SPAN></SPAN><SPAN></SPAN>touch_timer_fire(0);</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>return 
            IRQ_HANDLED;</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>}</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>static irqreturn_t 
            stylus_action(int irq, void *dev_id, struct pt_regs 
*regs)</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>{</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>unsigned long 
            data0;</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>unsigned long 
            data1;</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>data0 = 
            readl(base_addr+S3C2410_ADCDAT0);</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>data1 = 
            readl(base_addr+S3C2410_ADCDAT1);</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>ts.xp += data0 
            &amp; S3C2410_ADCDAT0_XPDATA_MASK;</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>ts.yp += data1 
            &amp; S3C2410_ADCDAT1_YPDATA_MASK;</SPAN></P>
            <P class=MsoNormal><SPAN 
            lang=EN-US><SPAN></SPAN>ts.count++;</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>if (ts.count &lt; 
            (1&lt;<TS.SHIFT )="" &#123;="" /></SPAN></P>
            <P class=MsoNormal><SPAN 
            lang=EN-US><SPAN></SPAN><SPAN></SPAN>writel(S3C2410_ADCTSC_PULL_UP_DISABLE 
            | AUTOPST, base_addr+S3C2410_ADCTSC);</SPAN></P>
            <P class=MsoNormal><SPAN 
            lang=EN-US><SPAN></SPAN><SPAN></SPAN>writel(readl(base_addr+S3C2410_ADCCON) 
            | S3C2410_ADCCON_ENABLE_START, base_addr+S3C2410_ADCCON);</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>} else {</SPAN></P>
            <P class=MsoNormal><SPAN 
            lang=EN-US><SPAN></SPAN><SPAN></SPAN>mod_timer(&amp;touch_timer, 
            jiffies+1);</SPAN></P>
            <P class=MsoNormal><SPAN 
            lang=EN-US><SPAN></SPAN><SPAN></SPAN>writel(WAIT4INT(1), 
            base_addr+S3C2410_ADCTSC);</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>}</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>return 
            IRQ_HANDLED;</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>}</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>static struct clk<SPAN> 
            </SPAN>*adc_clock;</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>/*</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>* The functions for 
            inserting/removing us as a module.</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>*/</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>static int __init 
            s3c2410ts_probe(struct device *dev)</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>{</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>struct 
            s3c2410_ts_mach_info *info;</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>info = ( struct 
            s3c2410_ts_mach_info *)dev-&gt;platform_data;</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>if 
            (!info)</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>{</SPAN></P>
            <P class=MsoNormal><SPAN 
            lang=EN-US><SPAN></SPAN><SPAN></SPAN>printk(KERN_ERR "Hm... too bad 
            : no platform data for ts\n");</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>return 
            -EINVAL;</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>}</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>#ifdef 
            CONFIG_TOUCHSCREEN_S3C2410_DEBUG</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>printk(DEBUG_LVL 
            "Entering s3c2410ts_init\n");</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>#endif</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>adc_clock = 
            clk_get(NULL, "adc");</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>if (!adc_clock) 
            {</SPAN></P>
            <P class=MsoNormal><SPAN 
            lang=EN-US><SPAN></SPAN><SPAN></SPAN>printk(KERN_ERR "failed to get 
            adc clock source\n");</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>return 
            -ENOENT;</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>}</SPAN></P>
            <P class=MsoNormal><SPAN 
            lang=EN-US><SPAN></SPAN>clk_use(adc_clock);</SPAN></P>
            <P class=MsoNormal><SPAN 
            lang=EN-US><SPAN></SPAN>clk_enable(adc_clock);</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>#ifdef 
            CONFIG_TOUCHSCREEN_S3C2410_DEBUG</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>printk(DEBUG_LVL 
            "got and enabled clock\n");</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>#endif</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN 
            lang=EN-US><SPAN></SPAN>base_addr=ioremap(S3C2410_PA_ADC,0x20);</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>if (base_addr == 
            NULL) {</SPAN></P>
            <P class=MsoNormal><SPAN 
            lang=EN-US><SPAN></SPAN><SPAN></SPAN>printk(KERN_ERR "Failed to 
            remap register block\n");</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>return 
            -ENOMEM;</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>}</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>/* Configure GPIOs 
            */</SPAN></P>
            <P class=MsoNormal><SPAN 
            lang=EN-US><SPAN></SPAN>s3c2410_ts_connect();</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>if 
            ((info-&gt;presc&amp;0xff) &gt; 0)</SPAN></P>
            <P class=MsoNormal><SPAN 
            lang=EN-US><SPAN></SPAN><SPAN></SPAN>writel(S3C2410_ADCCON_PRSCEN | 
            S3C2410_ADCCON_PRSCVL(info-&gt;presc&amp;0xFF),\</SPAN></P>
            <P class=MsoNormal><SPAN 
            lang=EN-US><SPAN></SPAN><SPAN></SPAN>base_addr+S3C2410_ADCCON);</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>else</SPAN></P>
            <P class=MsoNormal><SPAN 
            lang=EN-US><SPAN></SPAN><SPAN></SPAN>writel(0,base_addr+S3C2410_ADCCON);</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US>&lt;!--[if 
            !supportEmptyParas]--&gt; &lt;!--[endif]--&gt;<O:P></O:P></SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>/* Initialise 
            registers */</SPAN></P>
            <P class=MsoNormal><SPAN lang=EN-US><SPAN></SPAN>if 
            ((info-&gt;delay&amp;0xffff) &gt; 0)</SPAN></P>
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