path: root/os/boot/mpc/archfads.c

#include	"u.h"
#include	"lib.h"
#include	"mem.h"
#include	"dat.h"
#include	"fns.h"
#include	"io.h"
#include	"archfads.h"

/*
 * board-specific support for the 8xxFADS (including 860/21 development system)
 */

enum {
	USESDRAM = 0,	/* set to 1 if kernel is to use SDRAM as well as DRAM */

	/* sccr */
	RTSEL = IBIT(8),	/* =0, select main oscillator (OSCM); =1, select external crystal (EXTCLK) */
	RTDIV = IBIT(7),	/* =0, divide by 4; =1, divide by 512 */
	CRQEN = IBIT(9),	/* =1, switch to high frequency when CPM active */
	PRQEN = IBIT(10),	/* =1, switch to high frequency when interrupt pending */

	/* plprcr */
	CSRC = IBIT(21),	/* =0, clock is DFNH; =1, clock is DFNL */
};

/*
 * called early in main.c, after machinit:
 * using board and architecture specific registers, initialise
 * 8xx registers that need it and complete initialisation of the Mach structure.
 */
void
archinit(void)
{
	IMM *io;
	int mf, isfads, sysmhz, t;
	ulong v;

	v = getimmr() & 0xFFFF;
	isfads = 0;		/* assume it's the 860/821 board */
	sysmhz = 40;
	switch(v>>8){
	case 0x00:	t = 0x86000; break;
	case 0x20:	t = 0x82300; isfads = 1; break;
	case 0x21:	t = 0x823a0; isfads = 1; break;
	default:	t = 0; break;
	}
	m->cputype = t;
	m->bcsr = KADDR(BCSRMEM);
	m->bcsr[1] |= DisableRS232a | DisableIR | DisableEther | DisablePCMCIA | DisableRS232b;
	m->bcsr[1] &= ~(DisableDRAM|DisableFlash);
	if(isfads){
		sysmhz = 50;
		m->bcsr[1] &= ~EnableSDRAM;
		m->bcsr[4] &= ~(EnableVideoClock|EnableVideoPort);
		m->bcsr[4] |= DisableVideoLamp;
	}
	io = m->iomem;
	if(1 || io->sccr & IBIT(7)){	/* RTDIV=1 */
		/* oscillator frequency can't be determined independently: check a switch */
		if((m->bcsr[2]>>19)&(1<<2))
			m->clockgen = 5*MHz;
		else
			m->clockgen = 4*MHz;
	} else
		m->clockgen = 32768;
	mf = (sysmhz*MHz)/m->clockgen;
	m->cpuhz = m->clockgen*mf;
	io->plprcrk = KEEP_ALIVE_KEY;
	io->plprcr &= ~IBIT(21);	/* general system clock is DFNH */
	io->plprcr = (io->plprcr & ((1<<20)-1)) | ((mf-1)<<20);
	io->mptpr = 0x0400;	/* memory prescaler = 16 for refresh */
	io->plprcrk = ~KEEP_ALIVE_KEY;
	if(isfads){
		m->bcsr[1] |= EnableSDRAM;
		sdraminit(SDRAMMEM);
		if(!USESDRAM)
			m->bcsr[1] &= ~EnableSDRAM;	/* tells kernel not to map it */
	}
}

static void
archidprint(void)
{
	int f, i;
	ulong v;

	/* 8xx and FADS specific */
	print("IMMR: ");
	v = getimmr() & 0xFFFF;
	switch(v>>8){
	case 0x00:	print("MPC860/821"); break;
	case 0x20:	print("MPC823"); break;
	case 0x21:	print("MPC823A"); break;
	default:	print("Type #%lux", v>>8); break;
	}
	print(", mask #%lux\n", v&0xFF);
	v = m->bcsr[3]>>16;
	print("MPC8xxFADS rev %lud, DB: ", ((v>>4)&8)|((v>>1)&4)|(v&3));
	f = (v>>8)&0x3F;
	switch(f){
	default:	print("ID#%x", f); break;
	case 0x00:	print("MPC860/821"); break;
	case 0x01:	print("MPC813"); break;
	case 0x02:	print("MPC821"); break;
	case 0x03:	print("MPC823"); break;
	case 0x20:	print("MPC801"); break;
	case 0x21:	print("MPC850"); break;
	case 0x22:	print("MPC860"); break;
	case 0x23:	print("MPC860SAR"); break;
	case 0x24:	print("MPC860T"); break;
	}
	print("ADS, rev #%lux\n", (m->bcsr[2]>>16)&7);
	for(i=0; i<=4; i++)
		print("BCSR%d: %8.8lux\n", i, m->bcsr[i]);
	v = m->bcsr[2];
	f = (v>>28)&0xF;
	switch(f){
	default:	print("Unknown"); break;
	case 4:	print("SM732A2000/SM73228 - 8M SIMM"); break;
	case 5:	print("SM732A1000A/SM73218 - 4M SIMM"); break;
	case 6:	print("MCM29080 - 8M SIMM"); break;
	case 7:	print("MCM29040 - 4M SIMM"); break;
	case 8:	print("MCM29020 - 2M SIMM"); break;
	}
	switch((m->bcsr[3]>>20)&7){
	default:	i = 0; break;
	case 1:	i = 150; break;
	case 2:	i = 120; break;
	case 3:	i = 90; break;
	}
	print(" flash, %dns\n", i);
	f = (v>>23)&0xF;
	switch(f&3){
	case 0:	i = 4; break;
	case 1:	i = 32; break;
	case 2:	i = 16; break;
	case 3:	i = 8; break;
	}
	print("%dM SIMM, ", i);
	switch(f>>2){
	default: 	i = 0; break;
	case 2:	i = 70; break;
	case 3:	i = 60; break;
	}
	print("%dns\n", i);
	print("options: #%lux\n", (m->bcsr[2]>>19)&0xF);
	print("plprcr=%8.8lux sccr=%8.8lux\n", m->iomem->plprcr, m->iomem->sccr);
}

void
cpuidprint(void)
{
	int t;

	print("PVR: ");
	t = getpvr()>>16;
	switch(t){
	case 0x01:	print("MPC601"); break;
	case 0x03:	print("MPC603"); break;
	case 0x04:	print("MPC604"); break;
	case 0x06:	print("MPC603e"); break;
	case 0x07:	print("MPC603e-v7"); break;
	case 0x50:	print("MPC8xx"); break;
	default:	print("PowerPC version #%x", t); break;
	}
	print(", revision #%lux\n", getpvr()&0xffff);
	archidprint();
	print("%lud MHz system\n", m->cpuhz/MHz);
	print("\n");
}

static	char*	defplan9ini[2] = {
	/* 860/821 */
	"ether0=type=SCC port=1 ea=00108bf12900\r\n"
	"vgasize=640x480x8\r\n"
	"kernelpercent=40\r\n"
	"console=0 lcd\r\nbaud=9600\r\n",

	/* 823 */
	"ether0=type=SCC port=2 ea=00108bf12900\r\n"
	"vgasize=640x480x8\r\n"
	"kernelpercent=40\r\n"
	"console=0 lcd\r\nbaud=9600\r\n",
};

char *
archconfig(void)
{
	print("Using default configuration\n");
	return defplan9ini[MPCMODEL(m->cputype) == 0x823];
}

/*
 * provide value for #r/switch (devrtc.c)
 */
int
archoptionsw(void)
{
	return (m->bcsr[2]>>19)&0xF;	/* value of switch DS1 */
}

/*
 * invoked by clock.c:/^clockintr
 */
static void
twinkle(void)
{
	if(m->ticks%MS2TK(1000) == 0)
		m->bcsr[4] ^= DisableLamp;
}

void	(*archclocktick)(void) = twinkle;

/*
 * for flash.c:/^flashreset
 * retrieve flash type, virtual base and length and return 0;
 * return -1 on error (no flash)
 */
int
archflashreset(char *type, void **addr, long *length)
{
	char *t;
	int mbyte;

	if((m->iomem->memc[0].base & 1) == 0)
		return -1;		/* shouldn't happen */
	switch((m->bcsr[2]>>28)&0xF){
	default:	return -1;	/* unknown or not there */
	case 4:	mbyte=8; t = "SM732x8"; break;
	case 5:	mbyte=4; t = "SM732x8"; break;
	case 6:	mbyte=8; t = "AMD29F0x0"; break;
	case 7:	mbyte=4; t = "AMD29F0x0"; break;
	case 8:	mbyte=2; t = "AMD29F0x0"; break;
	}
	strcpy(type, t);
	*addr = KADDR(FLASHMEM);
	*length = mbyte*1024*1024;
	return 0;
}

/*
 * enable the clocks for the given SCC ether and reveal them to the caller.
 * do anything else required to prepare the transceiver (eg, set full-duplex, reset loopback).
 */
int
archetherenable(int cpmid, int *rcs, int *tcs)
{
	IMM *io;

	switch(cpmid){
	default:
		/* no other SCCs are wired on the FADS board */
		return -1;

	case SCC2ID:	/* assume 8xxFADS board with 823DABS */
		io = ioplock();
		m->bcsr[1] |= DisableIR|DisableRS232b;
		m->bcsr[1] &= ~DisableEther;
		io->papar |= SIBIT(6)|SIBIT(5);	/* enable CLK2 and CLK3 */
		io->padir &= ~(SIBIT(6)|SIBIT(5));

		/* ETHLOOP etc set in BCSR elsewhere */
		*rcs = CLK2;
		*tcs = CLK3;
		iopunlock();
		break;

	case SCC1ID:	/* assume 860/21 development board */
		io = ioplock();
		m->bcsr[1] |= DisableIR|DisableRS232b;	/* TO DO: might not be shared with RS232b */
		m->bcsr[1] &= ~DisableEther;
		io->papar |= SIBIT(6)|SIBIT(7);	/* enable CLK2 and CLK1 */
		io->padir &= ~(SIBIT(6)|SIBIT(7));

		/* settings peculiar to 860/821 development board */
		io->pcpar &= ~(SIBIT(4)|SIBIT(5)|SIBIT(6));	/* ETHLOOP, TPFULDL~, TPSQEL~ */
		io->pcdir |= SIBIT(4)|SIBIT(5)|SIBIT(6);
		io->pcdat &= ~SIBIT(4);
		io->pcdat |= SIBIT(5)|SIBIT(6);
		*rcs = CLK2;
		*tcs = CLK1;
		iopunlock();
		break;
	}
	return 0;
}

void
archetherdisable(int id)
{
	USED(id);
	m->bcsr[1] |= DisableEther|DisableIR|DisableRS232b;
}

/*
 * do anything extra required to enable the UART on the given CPM port
 */
void
archenableuart(int id, int irda)
{
	switch(id){
	case SMC1ID:
		m->bcsr[1] &= ~DisableRS232a;
		break;
	case SCC2ID:
		m->bcsr[1] |= DisableEther|DisableIR|DisableRS232b;
		if(irda)
			m->bcsr[1] &= ~DisableIR;
		else
			m->bcsr[1] &= ~DisableRS232b;
		break;
	default:
		/* nothing special */
		break;
	}
}

/*
 * do anything extra required to disable the UART on the given CPM port
 */
void
archdisableuart(int id)
{
	switch(id){
	case SMC1ID:
		m->bcsr[1] |= DisableRS232a;
		break;
	case SCC2ID:
		m->bcsr[1] |= DisableIR|DisableRS232b;
		break;
	default:
		/* nothing special */
		break;
	}
}

/*
 * enable/disable the LCD panel's backlight via
 * York touch panel interface (does no harm without it)
 */
void
archbacklight(int on)
{
	IMM *io;

	delay(2);
	io = ioplock();
	io->papar &= ~SIBIT(4);
	io->padir |= SIBIT(4);
	if(on)
		io->padat |= SIBIT(4);
	else
		io->padat &= ~SIBIT(4);
	iopunlock();
}