ref: 76f5318cbd58fbe2bfc8cb51856bfa217c673bb7
dir: /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();
}