bab7xx.c

uboot for K9 AT91RM9200 学习板

/*
 * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Andreas Heppel <[e-mail]>
 * (C) Copyright 2001 ELTEC Elektronik AG
 * Frank Gottschling <[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 <command.h>
#include <mpc106.h>
#include <mk48t59.h>
#include <74xx_7xx.h>
#include <ns87308.h>
#include <video_fb.h>

/*---------------------------------------------------------------------------*/
/*
 * Get Bus clock frequency
 */
ulong bab7xx_get_bus_freq (void)
{
    /*
     * The GPIO Port 1 on BAB7xx reflects the bus speed.
     */
    volatile struct GPIO *gpio = (struct GPIO *)(CFG_ISA_IO + CFG_NS87308_GPIO_BASE);

    unsigned char data = gpio->dta1;

    if (data & 0x02)
	return 66666666;

    return 83333333;
}

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

/*
 * Measure CPU clock speed (core clock GCLK1) (Approx. GCLK frequency in Hz)
 */
ulong bab7xx_get_gclk_freq (void)
{
    static const int pllratio_to_factor[] = {
	00, 75, 70, 00, 20, 65, 100, 45, 30, 55, 40, 50, 80, 60, 35, 00,
    };

    return pllratio_to_factor[get_hid1 () >> 28] * (bab7xx_get_bus_freq() / 10);
}

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

int checkcpu (void)
{
    uint pvr  = get_pvr();

    printf ("MPC7xx V%d.%d",(pvr >> 8) & 0xFF, pvr & 0xFF);
    printf (" at %ld / %ld MHz\n",  bab7xx_get_gclk_freq()/1000000,
	    bab7xx_get_bus_freq()/1000000);

    return (0);
}

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

int checkboard (void)
{
#ifdef CFG_ADDRESS_MAP_A
    puts ("Board: ELTEC BAB7xx PReP\n");
#else
    puts ("Board: ELTEC BAB7xx CHRP\n");
#endif
    return (0);
}

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

int checkflash (void)
{
    /* TODO: XXX XXX XXX */
    printf ("2 MB ## Test not implemented yet ##\n");
    return (0);
}

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


static unsigned int mpc106_read_cfg_dword (unsigned int reg)
{
    unsigned int reg_addr = MPC106_REG | (reg & 0xFFFFFFFC);

    out32r(MPC106_REG_ADDR, reg_addr);

    return (in32r(MPC106_REG_DATA | (reg & 0x3)));
}

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

long int dram_size (int board_type)
{
    /* No actual initialisation to do - done when setting up
     * PICRs MCCRs ME/SARs etc in ram_init.S.
     */

    register unsigned long i, msar1, mear1, memSize;

#if defined(CFG_MEMTEST)
    register unsigned long reg;

    printf("Testing DRAM\n");

    /* write each mem addr with it's address */
    for (reg = CFG_MEMTEST_START; reg < CFG_MEMTEST_END; reg+=4)
    *reg = reg;

    for (reg = CFG_MEMTEST_START; reg < CFG_MEMTEST_END; reg+=4)
    {
	if (*reg != reg)
	    return -1;
    }
#endif

    /*
    * Since MPC106 memory controller chip has already been set to
    * control all memory, just read and interpret its memory boundery register.
    */
    memSize = 0;
    msar1 = mpc106_read_cfg_dword(MPC106_MSAR1);
    mear1 = mpc106_read_cfg_dword(MPC106_MEAR1);
    i     = mpc106_read_cfg_dword(MPC106_MBER) & 0xf;

    do
    {
	if (i & 0x01)   /* is bank enabled ? */
	    memSize += (mear1 & 0xff) - (msar1 & 0xff) + 1;
	msar1 >>= 8;
	mear1 >>= 8;
	i     >>= 1;
    } while (i);

    return (memSize * 0x100000);
}

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

long int initdram(int board_type)
{
    return dram_size(board_type);
}

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

void after_reloc (ulong dest_addr)
{
    DECLARE_GLOBAL_DATA_PTR;

    /*
     * Jump to the main U-Boot board init code
     */
    board_init_r((gd_t *)gd, dest_addr);
}

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

/*
 * do_reset is done here because in this case it is board specific, since the
 * 7xx CPUs can only be reset by external HW (the RTC in this case).
 */
void
do_reset (cmd_tbl_t *cmdtp, bd_t *bd, int flag, int argc, char *argv[])
{
#if defined(CONFIG_RTC_MK48T59)
    /* trigger watchdog immediately */
    rtc_set_watchdog(1, RTC_WD_RB_16TH);
#else
    #error "You must define the macro CONFIG_RTC_MK48T59."
#endif
}

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

#if defined(CONFIG_WATCHDOG)
/*
 * Since the 7xx CPUs don't have an internal watchdog, this function is
 * board specific.  We use the RTC here.
 */
void watchdog_reset(void)
{
#if defined(CONFIG_RTC_MK48T59)
    /* we use a 32 sec watchdog timer */
    rtc_set_watchdog(8, RTC_WD_RB_4);
#else
    #error "You must define the macro CONFIG_RTC_MK48T59."
#endif
}
#endif    /* CONFIG_WATCHDOG */

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

#ifdef CONFIG_CONSOLE_EXTRA_INFO
extern GraphicDevice smi;

void video_get_info_str (int line_number, char *info)
{
    /* init video info strings for graphic console */
    switch (line_number)
    {
    case 1:
	sprintf (info," MPC7xx V%d.%d at %ld / %ld MHz",
	    (get_pvr() >> 8) & 0xFF,
	    get_pvr() & 0xFF,
	    bab7xx_get_gclk_freq()/1000000,
	    bab7xx_get_bus_freq()/1000000);
	return;
    case 2:
	sprintf (info, " ELTEC BAB7xx with %ld MB DRAM and %ld MB FLASH",
	    dram_size(0)/0x100000,
	    flash_init()/0x100000);
	return;
    case 3:
	sprintf (info, " %s", smi.modeIdent);
	return;
    }

    /* no more info lines */
    *info = 0;
    return;
}
#endif

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