tekkaman2440.c

U－Boot 1.3.1修改后的源码.1马

/*
 * (C) Copyright 2002
 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Marius Groeger <[e-mail]>
 *
 * (C) Copyright 2002
 * David Mueller, ELSOFT AG, <[e-mail]>
 *
 * (C) Copyright 2005
 * JinHua Luo, GuangDong Linux Center, <[e-mail]>
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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
 */

#include <common.h>
#include <s3c2410.h>

#if defined(CONFIG_CMD_NAND)
#include <linux/mtd/nand.h>
#endif

DECLARE_GLOBAL_DATA_PTR;

#define FCLK_SPEED 1

#if FCLK_SPEED==0		/* Fout = 203MHz, Fin = 12MHz for Audio */
#define M_MDIV	0xC3
#define M_PDIV	0x4
#define M_SDIV	0x1
#elif FCLK_SPEED==1		

#if defined(CONFIG_S3C2410)
/* Fout = 202.8MHz */
#define M_MDIV	0xA1
#define M_PDIV	0x3
#define M_SDIV	0x1
#endif

#if defined(CONFIG_S3C2440)
/* Fout = 405MHz */
#define M_MDIV 0x7f	
#define M_PDIV 0x2
#define M_SDIV 0x1
#endif
#endif


#define USB_CLOCK 1

#if USB_CLOCK==0
#define U_M_MDIV	0xA1
#define U_M_PDIV	0x3
#define U_M_SDIV	0x1
#elif USB_CLOCK==1

#if defined(CONFIG_S3C2410)
#define U_M_MDIV	0x48
#define U_M_PDIV	0x3
#endif

#if defined(CONFIG_S3C2440)
#define U_M_MDIV 0x38
#define U_M_PDIV 0x2
#endif

#define U_M_SDIV	0x2
#endif

static inline void delay (unsigned long loops)
{
	__asm__ volatile ("1:\n"
			  "subs %0, %1, #1\n"
			  "bne 1b":"=r" (loops):"0" (loops));
}

/*
 * Miscellaneous platform dependent initialisations
 */

int board_init (void)
{
	S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
	S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();

	/* to reduce PLL lock time, adjust the LOCKTIME register */
	clk_power->LOCKTIME = 0xFFFFFF;

	/* configure MPLL */
	clk_power->MPLLCON = ((M_MDIV << 12) + (M_PDIV << 4) + M_SDIV);

	/* some delay between MPLL and UPLL */
	delay (4000);

	/* configure UPLL */
	clk_power->UPLLCON = ((U_M_MDIV << 12) + (U_M_PDIV << 4) + U_M_SDIV);

	/* some delay between MPLL and UPLL */
	delay (8000);

	/* set up the I/O ports */
	gpio->GPACON = 0x007FFFFF;

#if defined(CONFIG_tekkaman2440_LED) 
	gpio->GPBCON = 0x00055556;
#else
	gpio->GPBCON = 0x00044556;
#endif
	gpio->GPBUP = 0x000007FF;
	gpio->GPCCON = 0xAAAAAAAA;
	gpio->GPCUP = 0x0000FFFF;
	gpio->GPDCON = 0xAAAAAAAA;
	gpio->GPDUP = 0x0000FFFF;
	gpio->GPECON = 0xAAAAAAAA;
	gpio->GPEUP = 0x0000FFFF;
	gpio->GPFCON = 0x000055AA;
	gpio->GPFUP = 0x000000FF;
	gpio->GPGCON = 0xFF95FF3A;
	gpio->GPGUP = 0x0000FFFF;
	gpio->GPHCON = 0x0016FAAA;
	gpio->GPHUP = 0x000007FF;

	gpio->EXTINT0=0x22222222;
	gpio->EXTINT1=0x22222222;
	gpio->EXTINT2=0x22222222;

#if defined(CONFIG_S3C2410)
	/* arch number of SMDK2410-Board */
	gd->bd->bi_arch_number = MACH_TYPE_SMDK2410;
#endif

#if defined(CONFIG_S3C2440)
/* arch number of S3C2440 -Board */
	gd->bd->bi_arch_number = MACH_TYPE_S3C2440 ;
#endif


	/* adress of boot parameters */
	gd->bd->bi_boot_params = 0x30000100;

	icache_enable();
	dcache_enable();
#if defined(CONFIG_tekkaman2440_LED) 
	gpio->GPBDAT = 0x180; //tekkamanninja
//int board_init (void)设置完成后，LED1和LED2会亮起！
#endif
	return 0;
}

int dram_init (void)
{
	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
	gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;

	return 0;
}

#if defined(CONFIG_CMD_NAND)
typedef enum {
	NFCE_LOW,
	NFCE_HIGH
} NFCE_STATE;

static inline void NF_Conf(u16 conf)
{
	S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
	nand->NFCONF = conf;
}


static inline void NF_Cmd(u8 cmd)
{
	S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
	nand->NFCMD = cmd;
}

static inline void NF_CmdW(u8 cmd)
{
	NF_Cmd(cmd);
	udelay(1);
}

static inline void NF_Addr(u8 addr)
{
	S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
	nand->NFADDR = addr;
}


static inline void NF_WaitRB(void)
{
	S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
	while (!(nand->NFSTAT & (1<<0)));
}

static inline void NF_Write(u8 data)
{
	S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
	nand->NFDATA = data;
}

static inline u8 NF_Read(void)
{
	S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
	return(nand->NFDATA);
}

static inline u32 NF_Read_ECC(void)
{
	S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
	return(nand->NFECC);
}

#if defined(CONFIG_S3C2440)
static inline void NF_Cont(u16 cont) 
{
	S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
	nand->NFCONT = cont;
}

static inline void NF_SetCE(NFCE_STATE s)
{
	S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
	switch (s) {
	case NFCE_LOW:
		nand->NFCONT &= ~(1<<1);
		break;
	case NFCE_HIGH:
		nand->NFCONT |= (1<<1);
		break;
	}
}

static inline void NF_Init_ECC(void)
{
	S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
	nand->NFCONT |= (1<<4);
}

#else
static inline void NF_SetCE(NFCE_STATE s)
{
	S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
	switch (s) {
	case NFCE_LOW:
		nand->NFCONF &= ~(1<<11);
		break;
	case NFCE_HIGH:
		nand->NFCONF |= (1<<11);
		break;
	}
}

static inline void NF_Init_ECC(void)
{
	S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
	nand->NFCONF |= (1<<12);
}
#endif

extern ulong nand_probe(ulong physadr);

static inline void NF_Reset(void)
{
	int i;

	NF_SetCE(NFCE_LOW);
	NF_Cmd(0xFF);		/* reset command */
	for(i = 0; i < 10; i++);	/* tWB = 100ns. */
	NF_WaitRB();		/* wait 200~500us; */
	NF_SetCE(NFCE_HIGH);
}

static inline void NF_Init(void)
{
#if 0
#define TACLS   0
#define TWRPH0  3
#define TWRPH1  0
#else
#define TACLS   0
#define TWRPH0  4
#define TWRPH1  2
#endif

#if defined(CONFIG_S3C2440)
	NF_Conf((TACLS<<12)|(TWRPH0<<8)|(TWRPH1<<4));
	NF_Cont((1<<6)|(1<<4)|(1<<1)|(1<<0));
#else
	NF_Conf((1<<15)|(0<<14)|(0<<13)|(1<<12)|(1<<11)|(TACLS<<8)|(TWRPH0<<4)|(TWRPH1<<0));
	/*nand->NFCONF = (1<<15)|(1<<14)|(1<<13)|(1<<12)|(1<<11)|(TACLS<<8)|(TWRPH0<<4)|(TWRPH1<<0); */
	/* 1  1    1     1,   1      xxx,  r xxx,   r xxx */
	/* En 512B 4step ECCR nFCE=H tACLS   tWRPH0   tWRPH1 */
#endif
	NF_Reset();
}

void nand_init(void)
{
	S3C2410_NAND * const nand = S3C2410_GetBase_NAND();

	NF_Init();
#ifdef DEBUG
	printf("NAND flash probing at 0x%.8lX\n", (ulong)nand);
#endif
	printf ("%4lu MB\n", nand_probe((ulong)nand) >> 20);
}
#endif