config.c

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#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/console.h>
#include <linux/rtc.h>
#include <linux/vt_kern.h>
#include <linux/interrupt.h>

#include <asm/setup.h>
#include <asm/bootinfo.h>
#include <asm/pgtable.h>
#include <asm/apollohw.h>
#include <asm/irq.h>
#include <asm/rtc.h>
#include <asm/machdep.h>

u_long sio01_physaddr;
u_long sio23_physaddr;
u_long rtc_physaddr;
u_long pica_physaddr;
u_long picb_physaddr;
u_long cpuctrl_physaddr;
u_long timer_physaddr;
u_long apollo_model;

extern void dn_sched_init(irq_handler_t handler);
extern void dn_init_IRQ(void);
extern unsigned long dn_gettimeoffset(void);
extern int dn_dummy_hwclk(int, struct rtc_time *);
extern int dn_dummy_set_clock_mmss(unsigned long);
extern void dn_dummy_reset(void);
#ifdef CONFIG_HEARTBEAT
static void dn_heartbeat(int on);
#endif
static irqreturn_t dn_timer_int(int irq,void *);
static void dn_get_model(char *model);
static const char *apollo_models[] = {
    [APOLLO_DN3000-APOLLO_DN3000] = "DN3000 (Otter)",
    [APOLLO_DN3010-APOLLO_DN3000] = "DN3010 (Otter)",
    [APOLLO_DN3500-APOLLO_DN3000] = "DN3500 (Cougar II)",
    [APOLLO_DN4000-APOLLO_DN3000] = "DN4000 (Mink)",
    [APOLLO_DN4500-APOLLO_DN3000] = "DN4500 (Roadrunner)"
};

int apollo_parse_bootinfo(const struct bi_record *record) {

    int unknown = 0;
    const unsigned long *data = record->data;

    switch(record->tag) {
        case BI_APOLLO_MODEL:
            apollo_model=*data;
            break;

        default:
             unknown=1;
    }

    return unknown;
}

void dn_setup_model(void) {


    printk("Apollo hardware found: ");
    printk("[%s]\n", apollo_models[apollo_model - APOLLO_DN3000]);

    switch(apollo_model) {
        case APOLLO_UNKNOWN:
            panic("Unknown apollo model");
            break;
        case APOLLO_DN3000:
        case APOLLO_DN3010:
            sio01_physaddr=SAU8_SIO01_PHYSADDR;
            rtc_physaddr=SAU8_RTC_PHYSADDR;
            pica_physaddr=SAU8_PICA;
            picb_physaddr=SAU8_PICB;
            cpuctrl_physaddr=SAU8_CPUCTRL;
            timer_physaddr=SAU8_TIMER;
            break;
        case APOLLO_DN4000:
            sio01_physaddr=SAU7_SIO01_PHYSADDR;
            sio23_physaddr=SAU7_SIO23_PHYSADDR;
            rtc_physaddr=SAU7_RTC_PHYSADDR;
            pica_physaddr=SAU7_PICA;
            picb_physaddr=SAU7_PICB;
            cpuctrl_physaddr=SAU7_CPUCTRL;
            timer_physaddr=SAU7_TIMER;
            break;
        case APOLLO_DN4500:
            panic("Apollo model not yet supported");
            break;
        case APOLLO_DN3500:
            sio01_physaddr=SAU7_SIO01_PHYSADDR;
            sio23_physaddr=SAU7_SIO23_PHYSADDR;
            rtc_physaddr=SAU7_RTC_PHYSADDR;
            pica_physaddr=SAU7_PICA;
            picb_physaddr=SAU7_PICB;
            cpuctrl_physaddr=SAU7_CPUCTRL;
            timer_physaddr=SAU7_TIMER;
            break;
        default:
            panic("Undefined apollo model");
            break;
    }


}

int dn_serial_console_wait_key(struct console *co) {

    while(!(sio01.srb_csrb & 1))
        barrier();
    return sio01.rhrb_thrb;
}

void dn_serial_console_write (struct console *co, const char *str,unsigned int count)
{
   while(count--) {
    if (*str == '\n') {
    sio01.rhrb_thrb = (unsigned char)'\r';
    while (!(sio01.srb_csrb & 0x4))
                ;
    }
    sio01.rhrb_thrb = (unsigned char)*str++;
    while (!(sio01.srb_csrb & 0x4))
            ;
  }
}

void dn_serial_print (const char *str)
{
    while (*str) {
        if (*str == '\n') {
            sio01.rhrb_thrb = (unsigned char)'\r';
            while (!(sio01.srb_csrb & 0x4))
                ;
        }
        sio01.rhrb_thrb = (unsigned char)*str++;
        while (!(sio01.srb_csrb & 0x4))
            ;
    }
}

void __init config_apollo(void)
{
    int i;

    dn_setup_model();

    mach_sched_init=dn_sched_init; /* */
    mach_init_IRQ=dn_init_IRQ;
    mach_gettimeoffset   = dn_gettimeoffset;
    mach_max_dma_address = 0xffffffff;
    mach_hwclk           = dn_dummy_hwclk; /* */
    mach_set_clock_mmss  = dn_dummy_set_clock_mmss; /* */
    mach_reset       = dn_dummy_reset;  /* */
#ifdef CONFIG_HEARTBEAT
    mach_heartbeat = dn_heartbeat;
#endif
    mach_get_model       = dn_get_model;

    cpuctrl=0xaa00;

    /* clear DMA translation table */
    for(i=0;i<0x400;i++)
        addr_xlat_map[i]=0;

}

irqreturn_t dn_timer_int(int irq, void *dev_id)
{
    irq_handler_t timer_handler = dev_id;

    volatile unsigned char x;

    timer_handler(irq, dev_id);

    x = *(volatile unsigned char *)(apollo_timer + 3);
    x = *(volatile unsigned char *)(apollo_timer + 5);

    return IRQ_HANDLED;
}

void dn_sched_init(irq_handler_t timer_routine)
{
    /* program timer 1 */
    *(volatile unsigned char *)(apollo_timer + 3) = 0x01;
    *(volatile unsigned char *)(apollo_timer + 1) = 0x40;
    *(volatile unsigned char *)(apollo_timer + 5) = 0x09;
    *(volatile unsigned char *)(apollo_timer + 7) = 0xc4;

    /* enable IRQ of PIC B */
    *(volatile unsigned char *)(pica+1)&=(~8);

#if 0
    printk("*(0x10803) %02x\n",*(volatile unsigned char *)(apollo_timer + 0x3));
    printk("*(0x10803) %02x\n",*(volatile unsigned char *)(apollo_timer + 0x3));
#endif

    if (request_irq(IRQ_APOLLO, dn_timer_int, 0, "time", timer_routine))
        pr_err("Couldn't register timer interrupt\n");
}

unsigned long dn_gettimeoffset(void) {

    return 0xdeadbeef;

}

int dn_dummy_hwclk(int op, struct rtc_time *t) {


  if(!op) { /* read */
    t->tm_sec=rtc->second;
    t->tm_min=rtc->minute;
    t->tm_hour=rtc->hours;
    t->tm_mday=rtc->day_of_month;
    t->tm_wday=rtc->day_of_week;
    t->tm_mon=rtc->month;
    t->tm_year=rtc->year;
  } else {
    rtc->second=t->tm_sec;
    rtc->minute=t->tm_min;
    rtc->hours=t->tm_hour;
    rtc->day_of_month=t->tm_mday;
    if(t->tm_wday!=-1)
      rtc->day_of_week=t->tm_wday;
    rtc->month=t->tm_mon;
    rtc->year=t->tm_year;
  }

  return 0;

}

int dn_dummy_set_clock_mmss(unsigned long nowtime) {

  printk("set_clock_mmss\n");

  return 0;

}

void dn_dummy_reset(void) {

  dn_serial_print("The end !\n");

  for(;;);

}

void dn_dummy_waitbut(void) {

  dn_serial_print("waitbut\n");

}

static void dn_get_model(char *model)
{
    strcpy(model, "Apollo ");
    if (apollo_model >= APOLLO_DN3000 && apollo_model <= APOLLO_DN4500)
        strcat(model, apollo_models[apollo_model - APOLLO_DN3000]);
}

#ifdef CONFIG_HEARTBEAT
static int dn_cpuctrl=0xff00;

static void dn_heartbeat(int on) {

    if(on) {
        dn_cpuctrl&=~0x100;
        cpuctrl=dn_cpuctrl;
    }
    else {
        dn_cpuctrl&=~0x100;
        dn_cpuctrl|=0x100;
        cpuctrl=dn_cpuctrl;
    }
}
#endif