iad210.c

AT91RM9200的完整启动代码：包括loader, boot及U-boot三部分均已编译通过！欢迎下载使用！

/*
 * (C) Copyright 2001
 * Paul Geerinckx
 *
 * 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 <mpc8xx.h>
#include "atm.h"
#include <i2c.h>

/* ------------------------------------------------------------------------- */

static long int dram_size (long int, long int *, long int);

/* ------------------------------------------------------------------------- */

/* used PLD registers */
#  define PLD_GCR1_REG (unsigned char *) (0x10000000 + 0)
#  define PLD_EXT_RES  (unsigned char *) (0x10000000 + 10)
#  define PLD_EXT_FETH (unsigned char *) (0x10000000 + 11)
#  define PLD_EXT_LED  (unsigned char *) (0x10000000 + 12)
#  define PLD_EXT_X21  (unsigned char *) (0x10000000 + 13)

#define	_NOT_USED_	0xFFFFFFFF

const uint sdram_table[] =
{
	/*
	 * Single Read. (Offset 0 in UPMA RAM)
	 */
	0xFE2DB004, 0xF0AA7004, 0xF0A5F400, 0xF3AFFC47, /* last */
	_NOT_USED_,
	/*
	 * SDRAM Initialization (offset 5 in UPMA RAM)
	 *
	 * This is no UPM entry point. The following definition uses
	 * the remaining space to establish an initialization
	 * sequence, which is executed by a RUN command.
	 *
	 */
		    0xFFFAF834, 0xFFE5B435, /* last */
                                            _NOT_USED_,
	/*
	 * Burst Read. (Offset 8 in UPMA RAM)
	 */
	0xFE2DB004, 0xF0AF7404, 0xF0AFFC00, 0xF0AFFC00,
	0xF0AFFC00, 0xF0AAF800, 0xF1A5E447, /* last */
                                            _NOT_USED_,
	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
	/*
	 * Single Write. (Offset 18 in UPMA RAM)
	 */
	0xFE29B300, 0xF1A27304, 0xFFA5F747,  /* last */
                                            _NOT_USED_,
	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
	/*
	 * Burst Write. (Offset 20 in UPMA RAM)
	 */
	0x1F0DFC04, 0xEEABBC00, 0x10A77C00, 0xF0AFFC00,
	0xF1AAF804, 0xFFA5F447, /* last */
			        _NOT_USED_, _NOT_USED_,
	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
	_NOT_USED_, _NOT_USED_, _NOT_USED_, _NOT_USED_,
	/*
	 * Refresh  (Offset 30 in UPMA RAM)
	 */
	0xFFAC3884, 0xFFAC3404, 0xFFAFFC04, 0xFFAFFC84,
	0xFFAFFC07, /* last */
		    _NOT_USED_, _NOT_USED_, _NOT_USED_,
	/*
	 * MRS sequence  (Offset 38 in UPMA RAM)
	 */
	0xFFAAB834, 0xFFA57434, 0xFFAFFC05, /* last */
                                            _NOT_USED_,
	/*
	 * Exception. (Offset 3c in UPMA RAM)
	 */
	0xFFAFFC04, 0xFFAFFC05, /* last */
		                _NOT_USED_, _NOT_USED_,
};

/* ------------------------------------------------------------------------- */



long int initdram (int board_type)
{
    volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
    volatile memctl8xx_t *memctl = &immap->im_memctl;
    volatile iop8xx_t      *iop    = &immap->im_ioport;
    volatile fec_t         *fecp   = &immap->im_cpm.cp_fec;
    long int size;

    upmconfig(UPMA, (uint *)sdram_table, sizeof(sdram_table)/sizeof(uint));

    /*
     * Preliminary prescaler for refresh (depends on number of
     * banks): This value is selected for four cycles every 62.4 us
     * with two SDRAM banks or four cycles every 31.2 us with one
     * bank. It will be adjusted after memory sizing.
     */
    memctl->memc_mptpr = CFG_MPTPR;

    memctl->memc_mar  = 0x00000088;

    /*
     * Map controller banks 2 and 3 to the SDRAM banks 2 and 3 at
     * preliminary addresses - these have to be modified after the
     * SDRAM size has been determined.
     */
    memctl->memc_or2 = CFG_OR2_PRELIM;
    memctl->memc_br2 = CFG_BR2_PRELIM;

    memctl->memc_mamr = CFG_MAMR & (~(MAMR_PTAE)); /* no refresh yet */

    udelay(200);

    /* perform SDRAM initializsation sequence */

    memctl->memc_mcr  = 0x80004105;	/* SDRAM bank 0 */
    udelay(1);
    memctl->memc_mcr  = 0x80004230;	/* SDRAM bank 0 - execute twice */
    udelay(1);

    memctl->memc_mcr  = 0x80004105;	/* SDRAM precharge */
    udelay(1);
    memctl->memc_mcr  = 0x80004030;	/* SDRAM 16x autorefresh */
    udelay(1);
    memctl->memc_mcr  = 0x80004138;	/* SDRAM upload parameters */
    udelay(1);

    memctl->memc_mamr |= MAMR_PTAE;	/* enable refresh */

    udelay (1000);

    /*
     * Check Bank 0 Memory Size for re-configuration
     *
     */
    size = dram_size (CFG_MAMR, (ulong *)SDRAM_BASE_PRELIM, SDRAM_MAX_SIZE);

    udelay (1000);


    memctl->memc_mamr = CFG_MAMR;
    udelay (1000);

    /*
     * Final mapping
     */
    memctl->memc_or2 = ((-size) & 0xFFFF0000) | CFG_OR2_PRELIM;
    memctl->memc_br2 = ((CFG_SDRAM_BASE & BR_BA_MSK) | BR_MS_UPMA | BR_V);

    udelay(10000);

    /* prepare pin multiplexing for fast ethernet */

    atmLoad();
    fecp->fec_ecntrl = 0x00000004;  /* rev D3 pinmux SET */
    iop->iop_pdpar |= 0x0080; /* set pin as MII_clock */


    return (size);
}

/* ------------------------------------------------------------------------- */

/*
 * Check memory range for valid RAM. A simple memory test determines
 * the actually available RAM size between addresses `base' and
 * `base + maxsize'. Some (not all) hardware errors are detected:
 * - short between address lines
 * - short between data lines
 */

static long int dram_size (long int mamr_value, long int *base, long int maxsize)
{
    volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
    volatile memctl8xx_t *memctl = &immap->im_memctl;
    volatile long int	 *addr;
    ulong		  cnt, val;
    ulong		  save[32];	/* to make test non-destructive */
    unsigned char	  i = 0;

    memctl->memc_mamr = mamr_value;

    for (cnt = maxsize/sizeof(long); cnt > 0; cnt >>= 1) {
	addr = base + cnt;	/* pointer arith! */

	save[i++] = *addr;
	*addr = ~cnt;
    }

    /* write 0 to base address */
    addr = base;
    save[i] = *addr;
    *addr = 0;

    /* check at base address */
    if ((val = *addr) != 0) {
	*addr = save[i];
	return (0);
    }

    for (cnt = 1; cnt <= maxsize/sizeof(long); cnt <<= 1) {
	addr = base + cnt;	/* pointer arith! */

	val = *addr;
	*addr = save[--i];

	if (val != (~cnt)) {
	    return (cnt * sizeof(long));
	}
    }
    return (maxsize);
}

/*
 * Check Board Identity:
 */

int checkboard (void)
{
    return (0);
}

void board_serial_init(void)
{
  ;/* nothing to do here */
}

void board_ether_init(void)
{
    volatile immap_t       *immap  = (immap_t *)CFG_IMMR;
    volatile iop8xx_t      *iop    = &immap->im_ioport;
    volatile fec_t         *fecp   = &immap->im_cpm.cp_fec;

  atmLoad();
  fecp->fec_ecntrl = 0x00000004;  /* rev D3 pinmux SET */
  iop->iop_pdpar |= 0x0080; /* set pin as MII_clock */
}

int board_pre_init (void)
{
    volatile immap_t       *immap  = (immap_t *)CFG_IMMR;
    volatile cpmtimer8xx_t *timers = &immap->im_cpmtimer;
    volatile memctl8xx_t   *memctl = &immap->im_memctl;
    volatile iop8xx_t      *iop    = &immap->im_ioport;

  /* configure the LED timing output pins - port A pin 4 */
    iop->iop_papar = 0x0800;
    iop->iop_padir = 0x0800;

  /* start timer 2 for the 4hz LED blink rate */
    timers->cpmt_tmr2 = 0xff2c;     /* 4hz for 64mhz */
    timers->cpmt_trr2 = 0x000003d0; /* clk/16 , prescale=256 */
    timers->cpmt_tgcr = 0x00000810; /* run timer 2 */

  /* chip select for PLD access */
    memctl->memc_br6  = 0x10000401;
    memctl->memc_or6  = 0xFC000908;

  /* PLD initial values ( set LEDs, remove reset on LXT) */

    *PLD_GCR1_REG = 0x06;
    *PLD_EXT_RES  = 0xC0;
    *PLD_EXT_FETH = 0x40;
    *PLD_EXT_LED  = 0xFF;
    *PLD_EXT_X21  = 0x04;
    return 0;
}

void board_get_enetaddr (uchar *addr)
{
    int i;
    volatile immap_t     *immap  = (immap_t *)CFG_IMMR;
    volatile cpm8xx_t	 *cpm    = &immap->im_cpm;
    unsigned int rccrtmp;

    char default_mac_addr[] = {0x00, 0x08, 0x01, 0x02, 0x03, 0x04};

    for (i=0; i<6; i++)
      addr[i] = default_mac_addr[i];

    printf("There is an error in the i2c driver .. /n");
    printf("You need to fix it first....../n");

    rccrtmp = cpm->cp_rccr;
    cpm->cp_rccr |= 0x0020;

    i2c_reg_read(0xa0, 0);
    printf ("seep = '-%c-%c-%c-%c-%c-%c-'\n",
     i2c_reg_read(0xa0, 0), i2c_reg_read(0xa0, 0), i2c_reg_read(0xa0, 0),
     i2c_reg_read(0xa0, 0), i2c_reg_read(0xa0, 0), i2c_reg_read(0xa0, 0) );

    cpm->cp_rccr = rccrtmp;


}