lcd_t35.c

/*
 * File      : lcd_t35.c
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2010, RT-Thread Develop Team
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rt-thread.org/license/LICENSE
 *
 * Change Logs:
 * Date           Author       Notes
 * 2010-01-01     bernard      first version from QiuYi's driver
 */

#include <rtthread.h>

#include <s3c24x0.h>

/* LCD driver for T3'5 */
#define LCD_WIDTH 240
#define LCD_HEIGHT 320
#define LCD_PIXCLOCK 4

#define LCD_RIGHT_MARGIN 25
#define LCD_LEFT_MARGIN 0
#define LCD_HSYNC_LEN 4

#define LCD_UPPER_MARGIN 1
#define LCD_LOWER_MARGIN 4
#define LCD_VSYNC_LEN 1

#define LCD_XSIZE  LCD_WIDTH
#define LCD_YSIZE  LCD_HEIGHT
#define SCR_XSIZE  LCD_WIDTH
#define SCR_YSIZE  LCD_HEIGHT

#define RT_HW_LCD_WIDTH		LCD_WIDTH
#define RT_HW_LCD_HEIGHT	LCD_HEIGHT

#define MVAL		(13)
#define MVAL_USED 	(0)		//0=each frame   1=rate by MVAL
#define INVVDEN		(1)		//0=normal       1=inverted
#define BSWP		(0)		//Byte swap control
#define HWSWP		(1)		//Half word swap control

#define GPB1_TO_OUT()		(GPBUP &= 0xfffd, GPBCON &= 0xfffffff3, GPBCON |= 0x00000004)
#define GPB1_TO_1()			(GPBDAT |= 0x0002)
#define GPB1_TO_0()			(GPBDAT &= 0xfffd)

#define S3C2410_LCDCON1_CLKVAL(x)  ((x) << 8)
#define S3C2410_LCDCON1_MMODE	   (1<<7)
#define S3C2410_LCDCON1_DSCAN4	   (0<<5)
#define S3C2410_LCDCON1_STN4	   (1<<5)
#define S3C2410_LCDCON1_STN8	   (2<<5)
#define S3C2410_LCDCON1_TFT	       (3<<5)

#define S3C2410_LCDCON1_STN1BPP	   (0<<1)
#define S3C2410_LCDCON1_STN2GREY   (1<<1)
#define S3C2410_LCDCON1_STN4GREY   (2<<1)
#define S3C2410_LCDCON1_STN8BPP	   (3<<1)
#define S3C2410_LCDCON1_STN12BPP   (4<<1)

#define S3C2410_LCDCON1_TFT1BPP	   (8<<1)
#define S3C2410_LCDCON1_TFT2BPP	   (9<<1)
#define S3C2410_LCDCON1_TFT4BPP	   (10<<1)
#define S3C2410_LCDCON1_TFT8BPP	   (11<<1)
#define S3C2410_LCDCON1_TFT16BPP   (12<<1)
#define S3C2410_LCDCON1_TFT24BPP   (13<<1)

#define S3C2410_LCDCON1_ENVID	   (1)

#define S3C2410_LCDCON1_MODEMASK    0x1E

#define S3C2410_LCDCON2_VBPD(x)	    ((x) << 24)
#define S3C2410_LCDCON2_LINEVAL(x)  ((x) << 14)
#define S3C2410_LCDCON2_VFPD(x)	    ((x) << 6)
#define S3C2410_LCDCON2_VSPW(x)	    ((x) << 0)

#define S3C2410_LCDCON2_GET_VBPD(x) ( ((x) >> 24) & 0xFF)
#define S3C2410_LCDCON2_GET_VFPD(x) ( ((x) >>  6) & 0xFF)
#define S3C2410_LCDCON2_GET_VSPW(x) ( ((x) >>  0) & 0x3F)

#define S3C2410_LCDCON3_HBPD(x)	    ((x) << 19)
#define S3C2410_LCDCON3_WDLY(x)	    ((x) << 19)
#define S3C2410_LCDCON3_HOZVAL(x)   ((x) << 8)
#define S3C2410_LCDCON3_HFPD(x)	    ((x) << 0)
#define S3C2410_LCDCON3_LINEBLANK(x)((x) << 0)

#define S3C2410_LCDCON3_GET_HBPD(x) ( ((x) >> 19) & 0x7F)
#define S3C2410_LCDCON3_GET_HFPD(x) ( ((x) >>  0) & 0xFF)

#define S3C2410_LCDCON4_MVAL(x)	    ((x) << 8)
#define S3C2410_LCDCON4_HSPW(x)	    ((x) << 0)
#define S3C2410_LCDCON4_WLH(x)	    ((x) << 0)

#define S3C2410_LCDCON4_GET_HSPW(x) ( ((x) >>  0) & 0xFF)

#define S3C2410_LCDCON5_BPP24BL	    (1<<12)
#define S3C2410_LCDCON5_FRM565	    (1<<11)
#define S3C2410_LCDCON5_INVVCLK	    (1<<10)
#define S3C2410_LCDCON5_INVVLINE    (1<<9)
#define S3C2410_LCDCON5_INVVFRAME   (1<<8)
#define S3C2410_LCDCON5_INVVD	    (1<<7)
#define S3C2410_LCDCON5_INVVDEN	    (1<<6)
#define S3C2410_LCDCON5_INVPWREN    (1<<5)
#define S3C2410_LCDCON5_INVLEND	    (1<<4)
#define S3C2410_LCDCON5_PWREN	    (1<<3)
#define S3C2410_LCDCON5_ENLEND	    (1<<2)
#define S3C2410_LCDCON5_BSWP	    (1<<1)
#define S3C2410_LCDCON5_HWSWP	    (1<<0)

#define	S3C2410_LCDINT_FRSYNC	(1<<1)

volatile rt_uint16_t _rt_framebuffer[RT_HW_LCD_HEIGHT][RT_HW_LCD_WIDTH];
//volatile rt_uint16_t _rt_hw_framebuffer[RT_HW_LCD_HEIGHT][RT_HW_LCD_WIDTH];
static struct rt_device_graphic_info _lcd_info;

static void lcd_power_enable(int invpwren, int pwren)
{
    //GPG4 is setted as LCD_PWREN
    GPGUP  = GPGUP | (1<<4); // Pull-up disable
    GPGCON = GPGCON | (3<<8); //GPG4=LCD_PWREN

    //Enable LCD POWER ENABLE Function
    LCDCON5 = LCDCON5&(~(1<<3))|(pwren<<3);   // PWREN
    LCDCON5 = LCDCON5&(~(1<<5))|(invpwren<<5);   // INVPWREN
}

static void lcd_envid_on_off(int onoff)
{
	if(onoff==1)
		/*ENVID=ON*/
		LCDCON1|=1;
	else
		/*ENVID Off*/
		LCDCON1 =LCDCON1 & 0x3fffe;
}

//********************** BOARD LCD backlight ****************************
static void LcdBkLtSet(rt_uint32_t HiRatio)
{
#define FREQ_PWM1		1000
	if(!HiRatio)
	{
		GPBCON  = GPBCON & (~(3<<2)) | (1<<2) ;	//GPB1Ϊoutput
		GPBDAT &= ~(1<<1);
		return;
	}
	GPBCON = GPBCON & (~(3<<2)) | (2<<2) ;

	if( HiRatio > 100 ) HiRatio = 100 ;

	TCON = TCON & (~(0xf<<8)) ;			    // clear manual update bit, stop Timer1

	TCFG0 &= 0xffffff00;					// set Timer 0&1 prescaler 0
	TCFG0 |= 15;							//prescaler = 15+1

	TCFG1 &= 0xffffff0f;					// set Timer 1 MUX 1/16
	TCFG1 |= 0x00000030;					// set Timer 1 MUX 1/16

	TCNTB1	 = ( 100000000>>8 )/FREQ_PWM1;  //if set inverter off, when TCNT2<=TCMP2, TOUT is high, TCNT2>TCMP2, TOUT is low
	TCMPB1  = ( TCNTB1*(100-HiRatio))/100 ;	//if set inverter on,  when TCNT2<=TCMP2, TOUT is low,  TCNT2>TCMP2, TOUT is high

	TCON = TCON & (~(0xf<<8)) | (0x0e<<8) ;
	TCON = TCON & (~(0xf<<8)) | (0x0d<<8) ;
}

/* RT-Thread Device Interface */
static rt_err_t rt_lcd_init (rt_device_t dev)
{	
	GPB1_TO_OUT();
	GPB1_TO_1();

	GPCUP  = 0x00000000;
	GPCCON = 0xaaaa02a9;

	GPDUP  = 0x00000000;
	GPDCON = 0xaaaaaaaa;

#define	M5D(n)	((n)&0x1fffff)
#define LCD_ADDR ((rt_uint32_t)_rt_framebuffer)
	LCDCON1 = (LCD_PIXCLOCK << 8) | (3 <<  5) | (12 << 1);
   	LCDCON2 = (LCD_UPPER_MARGIN << 24) | ((LCD_HEIGHT - 1) << 14) | (LCD_LOWER_MARGIN << 6) | (LCD_VSYNC_LEN << 0);
   	LCDCON3 = (LCD_RIGHT_MARGIN << 19) | ((LCD_WIDTH  - 1) <<  8) | (LCD_LEFT_MARGIN << 0);
   	LCDCON4 = (13 <<  8) | (LCD_HSYNC_LEN << 0);

#if !defined(LCD_CON5)
#define LCD_CON5 ((1<<11) | (1 << 9) | (1 << 8) | (1 << 3) | (1 << 0))
#endif
	LCDCON5   =  LCD_CON5;

	LCDSADDR1 = ((LCD_ADDR >> 22) << 21) | ((M5D(LCD_ADDR >> 1)) <<  0);
	LCDSADDR2 = M5D((LCD_ADDR + LCD_WIDTH * LCD_HEIGHT * 2) >> 1);
	LCDSADDR3 = LCD_WIDTH;

	LCDINTMSK |= (3);
	LPCSEL &= (~7) ;
	TPAL=0;

	LcdBkLtSet(70) ;
	lcd_power_enable(0, 1);
	lcd_envid_on_off(1);

	return RT_EOK;
}

static rt_err_t rt_lcd_control (rt_device_t dev, int cmd, void *args)
{
	switch (cmd)
	{
	case RTGRAPHIC_CTRL_RECT_UPDATE:
		break;
	case RTGRAPHIC_CTRL_POWERON:
		break;
	case RTGRAPHIC_CTRL_POWEROFF:
		break;
	case RTGRAPHIC_CTRL_GET_INFO:		
		rt_memcpy(args, &_lcd_info, sizeof(_lcd_info));
		break;
	case RTGRAPHIC_CTRL_SET_MODE:
		break;
	}

	return RT_EOK;
}

int rt_hw_lcd_init(void)
{
	rt_device_t lcd = rt_malloc(sizeof(struct rt_device));
	if (lcd == RT_NULL) 
		return -RT_ERROR; /* no memory yet */

	_lcd_info.bits_per_pixel = 16;
	_lcd_info.pixel_format = RTGRAPHIC_PIXEL_FORMAT_RGB565P;
	_lcd_info.framebuffer = (void*)_rt_framebuffer;
	_lcd_info.width = LCD_WIDTH;
	_lcd_info.height = LCD_HEIGHT;

	/* init device structure */
	lcd->type = RT_Device_Class_Unknown;
	lcd->init = rt_lcd_init;
	lcd->open = RT_NULL;
	lcd->close = RT_NULL;
	lcd->control = rt_lcd_control;
	lcd->user_data = (void*)&_lcd_info;
	
	/* register lcd device to RT-Thread */
	rt_device_register(lcd, "lcd", RT_DEVICE_FLAG_RDWR);
}

INIT_BOARD_EXPORT(rt_hw_lcd_init);