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/*
* Copyright (C) 1996 Paul Mackerras.
*/
#include "nonstdio.h"
#include "privinst.h"
#define scanhex xmon_scanhex
#define skipbl xmon_skipbl
#define ADB_B (*(volatile unsigned char *)0xf3016000)
#define ADB_SR (*(volatile unsigned char *)0xf3017400)
#define ADB_ACR (*(volatile unsigned char *)0xf3017600)
#define ADB_IFR (*(volatile unsigned char *)0xf3017a00)
static inline void eieio(void) { asm volatile ("eieio" : :); }
#define N_ADB_LOG 1000
struct adb_log {
unsigned char b;
unsigned char ifr;
unsigned char acr;
unsigned int time;
} adb_log[N_ADB_LOG];
int n_adb_log;
void
init_adb_log(void)
{
adb_log[0].b = ADB_B;
adb_log[0].ifr = ADB_IFR;
adb_log[0].acr = ADB_ACR;
adb_log[0].time = get_dec();
n_adb_log = 0;
}
void
dump_adb_log(void)
{
unsigned t, t0;
struct adb_log *ap;
int i;
ap = adb_log;
t0 = ap->time;
for (i = 0; i <= n_adb_log; ++i, ++ap) {
t = t0 - ap->time;
printf("b=%x ifr=%x acr=%x at %d.%.7d\n", ap->b, ap->ifr, ap->acr,
t / 1000000000, (t % 1000000000) / 100);
}
}
void
adb_chklog(void)
{
struct adb_log *ap = &adb_log[n_adb_log + 1];
ap->b = ADB_B;
ap->ifr = ADB_IFR;
ap->acr = ADB_ACR;
if (ap->b != ap[-1].b || (ap->ifr & 4) != (ap[-1].ifr & 4)
|| ap->acr != ap[-1].acr) {
ap->time = get_dec();
++n_adb_log;
}
}
int
adb_bitwait(int bmask, int bval, int fmask, int fval)
{
int i;
struct adb_log *ap;
for (i = 10000; i > 0; --i) {
adb_chklog();
ap = &adb_log[n_adb_log];
if ((ap->b & bmask) == bval && (ap->ifr & fmask) == fval)
return 0;
}
return -1;
}
int
adb_wait(void)
{
if (adb_bitwait(0, 0, 4, 4) < 0) {
printf("adb: ready wait timeout\n");
return -1;
}
return 0;
}
void
adb_readin(void)
{
int i, j;
unsigned char d[64];
if (ADB_B & 8) {
printf("ADB_B: %x\n", ADB_B);
return;
}
i = 0;
adb_wait();
j = ADB_SR;
eieio();
ADB_B &= ~0x20;
eieio();
for (;;) {
if (adb_wait() < 0)
break;
d[i++] = ADB_SR;
eieio();
if (ADB_B & 8)
break;
ADB_B ^= 0x10;
eieio();
}
ADB_B |= 0x30;
if (adb_wait() == 0)
j = ADB_SR;
for (j = 0; j < i; ++j)
printf("%.2x ", d[j]);
printf("\n");
}
int
adb_write(unsigned char *d, int i)
{
int j;
unsigned x;
if ((ADB_B & 8) == 0) {
printf("r: ");
adb_readin();
}
for (;;) {
ADB_ACR = 0x1c;
eieio();
ADB_SR = d[0];
eieio();
ADB_B &= ~0x20;
eieio();
if (ADB_B & 8)
break;
ADB_ACR = 0xc;
eieio();
ADB_B |= 0x20;
eieio();
adb_readin();
}
adb_wait();
for (j = 1; j < i; ++j) {
ADB_SR = d[j];
eieio();
ADB_B ^= 0x10;
eieio();
if (adb_wait() < 0)
break;
}
ADB_ACR = 0xc;
eieio();
x = ADB_SR;
eieio();
ADB_B |= 0x30;
return j;
}
void
adbcmds(void)
{
char cmd;
unsigned rtcu, rtcl, dec, pdec, x;
int i, j;
unsigned char d[64];
cmd = skipbl();
switch (cmd) {
case 't':
for (;;) {
rtcl = get_rtcl();
rtcu = get_rtcu();
dec = get_dec();
printf("rtc u=%u l=%u dec=%x (%d = %d.%.7d)\n",
rtcu, rtcl, dec, pdec - dec, (pdec - dec) / 1000000000,
((pdec - dec) % 1000000000) / 100);
pdec = dec;
if (cmd == 'x')
break;
while (xmon_read(stdin, &cmd, 1) != 1)
;
}
break;
case 'r':
init_adb_log();
while (adb_bitwait(8, 0, 0, 0) == 0)
adb_readin();
break;
case 'w':
i = 0;
while (scanhex(&x))
d[i++] = x;
init_adb_log();
j = adb_write(d, i);
printf("sent %d bytes\n", j);
while (adb_bitwait(8, 0, 0, 0) == 0)
adb_readin();
break;
case 'l':
dump_adb_log();
break;
}
}
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