s3c2416 u-boot增加LCD驱动(一)

这里使用的是广州斯道的icool2416开发板 u-boot版本1.3.4

主要增加LCD驱动 同时增加LCD与串口同步输出

修改如下:

在drivers/video(以u-boot源码为要目录)目录下增加以下文件gzsd2416-lcd.c,gzsd2416-lcd.h和s3cfb-reg.h内容如下:

gzsd2416-lcd.c ,LCD初始化与背光控制

/*
 * Gzsd2416 Framebuffer driver.
 *
 * Copyright 2013 Store information technology guangzhou ltd
 * hclydao 
  
   
 *
 * 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.
 */
#include 
   
     #include 
    
      #include "gzsd2416-lcd.h" #include 
     
       #include 
      
        #include 
       
         DECLARE_GLOBAL_DATA_PTR; vidinfo_t panel_info = { S3CFB_HRES, S3CFB_VRES, 0, 0, PIXELBITS, }; void lcd_backlight(int enable) { unsigned long reg; reg = readl(GPBCON); reg &= ~(0x3 << 0); reg |= (0x1 << 0); writel(reg,GPBCON); reg = readl(GPBDAT); if(enable) reg |= (0x1 << 0); else reg &= ~(0x1 << 0); writel(reg, GPBDAT); } void lcd_disable (void) { V
        IDCON0_REG &= (~(VIDCON0_ENVID_ENABLE | VIDCON0_ENVID_F_ENABLE)); } void lcd_enable (void) { VIDCON0_REG |= (VIDCON0_ENVID_ENABLE | VIDCON0_ENVID_F_ENABLE); } void lcd_panel_disable(void) { //MIFPCON_REG |= SEL_BYPASS_MASK; } ulong calc_fbsize (void) { ulong size; int line_length = (panel_info.vl_col * panel_info.vl_bpix) / 8; size = line_length * panel_info.vl_row; return size; } void lcd_ctrl_init(void *lcdbase) { ulong freq_lcdclk; ulong freq_Hclk; ulong fb_size; unsigned char nn; GPCCON_REG = 0xaaaa02aa; GPCPU_REG = 0xaaaa02aa; GPDCON_REG = 0xaaaaaaaa; GPDPU_REG = 0xaaaaaaaa; lcd_disable(); WINCON0_REG &= ~WINCONx_ENWIN_F_ENABLE; WINCON1_REG &= ~WINCONx_ENWIN_F_ENABLE; freq_lcdclk = S3CFB_PIXEL_CLOCK; freq_Hclk = get_HCLK(); nn = (unsigned char)(freq_Hclk / freq_lcdclk) - 1; if(freq_lcdclk < freq_Hclk/2) { VIDCON0_REG = (VIDCON0_S_RGB_IF) | (VIDCON0_S_RGB_PAR) | (VIDCON0_S_VCLK_GATING_OFF) | (VIDCON0_S_CLKDIR_DIVIDED) | (VIDCON0_S_CLKSEL_HCLK) | VIDCON0_CLKVAL_F(nn); } else { VIDCON0_REG = (VIDCON0_S_RGB_IF) | (VIDCON0_S_RGB_PAR) | (VIDCON0_S_VCLK_GATING_OFF) | (VIDCON0_S_CLKDIR_DIVIDED) | (VIDCON0_S_CLKSEL_HCLK) | VIDCON0_CLKVAL_F(0); } VIDCON1_REG = ( VIDCON1_S_HSYNC_INVERTED) | (VIDCON1_S_VSYNC_INVERTED); VIDTCON0_REG = VIDTCON0_VBPD(S3CFB_VBP - 1) | VIDTCON0_VFPD(S3CFB_VFP - 1) | VIDTCON0_VSPW(S3CFB_VSW - 1); VIDTCON1_REG = VIDTCON1_HBPD(S3CFB_HBP - 1) | VIDTCON1_HFPD(S3CFB_HFP - 1) | VIDTCON1_HSPW(S3CFB_HSW - 1); VIDTCON2_REG = VIDTCON2_LINeva l(S3CFB_VRES - 1) | VIDTCON2_HOZVAL(S3CFB_HRES - 1); WINCON0_REG = WINCONx_BPPMODE_F_16BPP_565 | WINCONx_HAWSWP_ENABLE; WINCON1_REG = WINCONx_BPPMODE_F_16BPP_565 | WINCONx_HAWSWP_ENABLE;// | WINCONx_BLD_PIX_PIXEL; VIDOSD0A_REG = VIDOSDxA_OSD_LTX_F(0) | VIDOSDxA_OSD_LTY_F(0); VIDOSD0B_REG = VIDOSDxB_OSD_RBX_F(S3CFB_HRES - 1) | VIDOSDxB_OSD_RBY_F(S3CFB_VRES - 1); VIDOSD1A_REG = VIDOSDxA_OSD_LTX_F(0) | VIDOSDxA_OSD_LTY_F(0); VIDOSD1B_REG = VIDOSDxB_OSD_RBX_F(S3CFB_HRES - 1) | VIDOSDxB_OSD_RBY_F(S3CFB_VRES - 1); VIDOSD1C_REG = 0xDDD000;/*alpha blending*/ fb_size = calc_fbsize(); VIDW00ADD0B0_REG = virt_to_phys((unsigned int)lcdbase); VIDW01ADD0_REG = virt_to_phys(osd_frame_buffer); VIDW00ADD1B0_REG = virt_to_phys((unsigned int)lcdbase + fb_size); VIDW01ADD1_REG = virt_to_phys(osd_frame_buffer) + fb_size; VIDW00ADD2B0_REG = VIDWxADD2_OFFSIZE_F(0) | VIDWxADD2_PAGEWIDTH_F(S3CFB_HRES*2); W1KEYCON0_REG = WxKEYCON0_KEYBLEN_ENABLE | WxKEYCON0_KEYEN_F_ENABLE | WxKEYCON0_COMPKEY(0xFFFF); W1KEYCON1_REG = 0x00000000;/*color key*/ lcd_enable(); WINCON0_REG |= WINCONx_ENWIN_F_ENABLE; WINCON1_REG |= WINCONx_ENWIN_F_ENABLE; //run_command("fatload mmc 0 0x33d00000 logo.bin", 0); //memset(lcdbase,0xf0,fb_size); lcd_backlight(1); return 0; } void lcd_setcolreg (ushort regno, ushort red, ushort green, ushort blue) { }
       
      
     
    
   
  

#ifndef GZSD2416_LCD_H
#define GZSD2416_LCD_H
#include 
  
   
#include "s3cfb-reg.h"
#include 
   
     #if defined(CONFIG_LCD_NC43) #define S3CFB_HSW 41 #define S3CFB_HBP 2 #define S3CFB_HFP 2 #define S3CFB_VSW 10 #define S3CFB_VBP 2 #define S3CFB_VFP 2 #define S3CFB_HRES 480 #define S3CFB_VRES 272 #define S3CFB_VFRAME_FREQ 60 #elif defined(CONFIG_LCD_AT070) #define S3CFB_HSW 20 #define S3CFB_HBP 30 #define S3CFB_HFP 88 #define S3CFB_VSW 5 #define S3CFB_VBP 15 #define S3CFB_VFP 5 #define S3CFB_HRES 800 #define S3CFB_VRES 480 #define S3CFB_VFRAME_FREQ 60 #endif #if defined(CONFIG_LCDBPP_32) #define PIXELBITS 32 #define LCD_BPP LCD_COLOR32 #elif defined(CONFIG_LCDBPP_16) #define PIXELBITS 16 #define LCD_BPP LCD_COLOR16 #endif #define S3CFB_IVCLK 0//CFG_LOW #define S3CFB_IHSYNC 1//CFG_HIGH #define S3CFB_IVSYNC 1//CFG_HIGH #define S3CFB_IVDEN 0//CFG_LOW #define S3CFB_PIXEL_CLOCK (S3CFB_VFRAME_FREQ * (S3CFB_HFP + S3CFB_HSW + S3CFB_HBP + S3CFB_HRES) * (S3CFB_VFP + S3CFB_VSW + S3CFB_VBP + S3CFB_VRES)) #endif
   
  

#ifndef S3CFB_REG_H
#define S3CFB_REG_H

//rVIDCON0
#define VIDCON0_S_RGB_IF (0<<22)
#define VIDCON0_S_RGB_PAR (0<<13)
#define VIDCON0_S_VCLK_GATING_OFF (1<<5)
#define VIDCON0_S_CLKDIR_DIVIDED (1<<4)
#define VIDCON0_S_CLKSEL_HCLK (0<<2)
#define VIDCON0_ENVID_ENABLE (1 << 1)
#define VIDCON0_ENVID_F_ENABLE (1 << 0)

#define VIDCON0_CLKVAL_F(x) (((x)&0xff)<<6)

//rVIDCON1
#define VIDCON1_S_HSYNC_INVERTED (1<<6)
#define VIDCON1_S_VSYNC_INVERTED (1<<5)

//rVIDTCON0
#define VIDTCON0_VBPD(x) (((x)&0xff)<<16)
#define VIDTCON0_VFPD(x) (((x)&0xff)<<8)
#define VIDTCON0_VSPW(x) (((x)&0xff)<<0)

//rVIDTCON1
#define VIDTCON1_HBPD(x) (((x)&0xff)<<16)
#define VIDTCON1_HFPD(x) (((x)&0xff)<<8)
#define VIDTCON1_HSPW(x) (((x)&0xff)<<0)

//rVIDTCON2
#define VIDTCON2_LINeva l(x) (((x)&0x7ff)<<11)
#define VIDTCON2_HOZVAL(x) (((x)&0x7ff)<<0)

//rWINCONx
#define WINCONx_BPPMODE_F_16BPP_565 (5 << 2)
#define WINCONx_ENWIN_F_ENABLE (1 << 0)

#define WINCONx_BLD_PIX_PIXEL			(1<<6)
#define WINCONx_HAWSWP_ENABLE			(1<<16)

//rVIDOSD0A
#define VIDOSDxA_OSD_LTX_F(x) (((x)&0x7ff)<<11)
#define VIDOSDxA_OSD_LTY_F(x) (((x)&0x7ff)<<0)

//rVIDOSD0B
#define VIDOSDxB_OSD_RBX_F(x) (((x)&0x7ff)<<11)
#define VIDOSDxB_OSD_RBY_F(x) (((x)&0x7ff)<<0)


//* VIDWxADD2
#define VIDWxADD2_OFFSIZE_F(x) (((x)&0x1fff)<<13)
#define VIDWxADD2_PAGEWIDTH_F(x) (((x)&0x1fff)<<0) 
//WxKEYCON0
#define WxKEYCON0_KEYBLEN_ENABLE			(1<<26)
#define WxKEYCON0_KEYEN_F_ENABLE			(1<<25)
#define WxKEYCON0_COMPKEY(x)			(((x)&0xFFFFFF)<<0)

#endif

COBJS-$(CONFIG_VIDEO_GZSD2416) += gzsd2416-lcd.o

//LCD
#define CONFIG_LCD				1
#define CONFIG_VIDEO_GZSD2416	1
#define CONFIG_LCD_AT070		1
#define CONFIG_LCDBPP_16		1
#define CONFIG_LCD_GZSD			1

#elif defined(CONFIG_LCD_GZSD)

typedef struct vidinfo {
    us