config.c

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/***************************************************************************/

/*
 *  linux/arch/m68knommu/platform/68VZ328/config.c
 *
 *  Copyright (C) 1993 Hamish Macdonald
 *  Copyright (C) 1999 D. Jeff Dionne
 *  Copyright (C) 2001 Georges Menie, Ken Desmet
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive
 * for more details.
 */

/***************************************************************************/

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/kd.h>
#include <linux/netdevice.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/rtc.h>

#include <asm/pgtable.h>
#include <asm/machdep.h>
#include <asm/MC68VZ328.h>
#include <asm/bootstd.h>

#ifdef CONFIG_INIT_LCD
#include "bootlogo.h"
#endif

/***************************************************************************/

int m68328_hwclk(int set, struct rtc_time *t);

/***************************************************************************/
/*                        Init Drangon Engine hardware                     */
/***************************************************************************/
#if defined(CONFIG_DRAGEN2)

static void m68vz328_reset(void)
{
    local_irq_disable();

#ifdef CONFIG_INIT_LCD
    PBDATA |= 0x20;             /* disable CCFL light */
    PKDATA |= 0x4;              /* disable LCD controller */
    LCKCON = 0;
#endif

    __asm__ __volatile__(
        "reset\n\t"
        "moveal #0x04000000, %a0\n\t"
        "moveal 0(%a0), %sp\n\t"
        "moveal 4(%a0), %a0\n\t"
        "jmp (%a0)"
    );
}

static void init_hardware(char *command, int size)
{
#ifdef CONFIG_DIRECT_IO_ACCESS
    SCR = 0x10;                 /* allow user access to internal registers */
#endif

    /* CSGB Init */
    CSGBB = 0x4000;
    CSB = 0x1a1;

    /* CS8900 init */
    /* PK3: hardware sleep function pin, active low */
    PKSEL |= PK(3);             /* select pin as I/O */
    PKDIR |= PK(3);             /* select pin as output */
    PKDATA |= PK(3);            /* set pin high */

    /* PF5: hardware reset function pin, active high */
    PFSEL |= PF(5);             /* select pin as I/O */
    PFDIR |= PF(5);             /* select pin as output */
    PFDATA &= ~PF(5);           /* set pin low */

    /* cs8900 hardware reset */
    PFDATA |= PF(5);
    { int i; for (i = 0; i < 32000; ++i); }
    PFDATA &= ~PF(5);

    /* INT1 enable (cs8900 IRQ) */
    PDPOL &= ~PD(1);            /* active high signal */
    PDIQEG &= ~PD(1);
    PDIRQEN |= PD(1);           /* IRQ enabled */

#ifdef CONFIG_INIT_LCD
    /* initialize LCD controller */
    LSSA = (long) screen_bits;
    LVPW = 0x14;
    LXMAX = 0x140;
    LYMAX = 0xef;
    LRRA = 0;
    LPXCD = 3;
    LPICF = 0x08;
    LPOLCF = 0;
    LCKCON = 0x80;
    PCPDEN = 0xff;
    PCSEL = 0;

    /* Enable LCD controller */
    PKDIR |= 0x4;
    PKSEL |= 0x4;
    PKDATA &= ~0x4;

    /* Enable CCFL backlighting circuit */
    PBDIR |= 0x20;
    PBSEL |= 0x20;
    PBDATA &= ~0x20;

    /* contrast control register */
    PFDIR |= 0x1;
    PFSEL &= ~0x1;
    PWMR = 0x037F;
#endif
}

/***************************************************************************/
/*                      Init RT-Control uCdimm hardware                    */
/***************************************************************************/
#elif defined(CONFIG_UCDIMM)

static void m68vz328_reset(void)
{
    local_irq_disable();
    asm volatile (
        "moveal #0x10c00000, %a0;\n\t"
        "moveb #0, 0xFFFFF300;\n\t"
        "moveal 0(%a0), %sp;\n\t"
        "moveal 4(%a0), %a0;\n\t"
        "jmp (%a0);\n"
    );
}

unsigned char *cs8900a_hwaddr;
static int errno;

_bsc0(char *, getserialnum)
_bsc1(unsigned char *, gethwaddr, int, a)
_bsc1(char *, getbenv, char *, a)

static void init_hardware(char *command, int size)
{
    char *p;

    printk(KERN_INFO "uCdimm serial string [%s]\n", getserialnum());
    p = cs8900a_hwaddr = gethwaddr(0);
    printk(KERN_INFO "uCdimm hwaddr %.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n",
        p[0], p[1], p[2], p[3], p[4], p[5]);
    p = getbenv("APPEND");
    if (p)
        strcpy(p, command);
    else
        command[0] = 0;
}

/***************************************************************************/
#else

static void m68vz328_reset(void)
{
}

static void init_hardware(char *command, int size)
{
}

/***************************************************************************/
#endif
/***************************************************************************/

void config_BSP(char *command, int size)
{
    printk(KERN_INFO "68VZ328 DragonBallVZ support (c) 2001 Lineo, Inc.\n");

    init_hardware(command, size);

    mach_hwclk = m68328_hwclk;
    mach_reset = m68vz328_reset;
}

/***************************************************************************/