softboot.c

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/*
 * softboot routine
 */

#include "config.h"

#define PIO0_DATA (*(volatile unsigned long *)0x00500604)

void __softboot_start(void)
{

		unsigned long pllvalue,plldiv, pllmult;
		// power off RAM
		*((volatile unsigned long *)0x00500320)=0;
		*((volatile unsigned long *)0x00500300)=0;

		// power off DVD drive (pio0 pin 4)
		*((volatile unsigned long *)0x00500608)=1<<20;
		*((volatile unsigned long *)0x00500604)=1<<20|1<<4;
		
// Hold all the quasar stuff in reset 
// XXX doesnt seem to buy anything, plus thsi causes a small OSD glitch
//		*((volatile unsigned long *)0x00607FE0)=0xFFFF;
//		*((volatile unsigned long *)0x00607FE4)=0xFFFF;
										

/*		
// ***** SET PLL: PLL REG *****
		mov r0, #QUASAR_BASE                    // BASE: 0x0600000
		add r0, r0, #0x7000                     // generate 0x0607000
		add r0, r0, #0x0010                     // generate 0x0607100 = REG 0x1C04 on Quasar
		mov r1, #(PLLREG_VALUE & 0xFF)          // 0x8e=99.9 - 0xd6=148.5 
		add r1, r1, #(PLLREG_VALUE & 0xFF00)    // generate pattern 38E/3d6
		str r1, [r0, #0]                        // write to DBUS_pll_control
*/
		pllmult=0;
		plldiv=3;
		pllvalue = (plldiv<<8)+(pllmult<<2)+2;
		*((volatile unsigned long *)0x0607010)=pllvalue;
		
		// wait for IR activity SAR_BASE                    // BASE: 0x
	
		//set pio direction - input
		*((volatile unsigned long *)0x00500608)=1<<17;
		// wait pio0 pin 1 to 0
		while((PIO0_DATA & 2) == 0);
		// wait pio0 pin 1 to 1
		while((PIO0_DATA & 2) != 0);

		// power on RAM
		*((volatile unsigned long *)0x00500320)=1;
		
		return;
}