int
tpm_tis12_write(struct tpm_softc *sc, void *buf, int len)
{
u_int8_t *p = buf;
size_t cnt;
int rv, r;
#ifdef TPM_DEBUG
printf("tpm_tis12_write: sc %p buf %p len %d\n", sc, buf, len);
#endif
if ((rv = tpm_request_locality(sc, 0)) != 0)
return rv;
cnt = 0;
while (cnt < len - 1) {
for (r = tpm_getburst(sc); r > 0 && cnt < len - 1; r--) {
bus_space_write_1(sc->sc_bt, sc->sc_bh, TPM_DATA, *p++);
cnt++;
}
if ((rv = tpm_waitfor(sc, TPM_STS_VALID, TPM_READ_TMO, sc))) {
#ifdef TPM_DEBUG
printf("tpm_tis12_write: failed burst rv %d\n", rv);
#endif
return rv;
}
sc->sc_stat = tpm_status(sc);
if (!(sc->sc_stat & TPM_STS_DATA_EXPECT)) {
#ifdef TPM_DEBUG
printf("tpm_tis12_write: failed rv %d stat=%b\n", rv,
sc->sc_stat, TPM_STS_BITS);
#endif
return EIO;
}
}
bus_space_write_1(sc->sc_bt, sc->sc_bh, TPM_DATA, *p++);
cnt++;
if ((rv = tpm_waitfor(sc, TPM_STS_VALID, TPM_READ_TMO, sc))) {
#ifdef TPM_DEBUG
printf("tpm_tis12_write: failed last byte rv %d\n", rv);
#endif
return rv;
}
if ((sc->sc_stat & TPM_STS_DATA_EXPECT) != 0) {
#ifdef TPM_DEBUG
printf("tpm_tis12_write: failed rv %d stat=%b\n", rv,
sc->sc_stat, TPM_STS_BITS);
#endif
return EIO;
}
#ifdef TPM_DEBUG
printf("tpm_tis12_write: wrote %d byte\n", cnt);
#endif
return 0;
}
int
tpm_tis12_read(struct tpm_softc *sc, void *buf, size_t len, size_t *count,
int flags)
{
uint8_t *p = buf;
size_t cnt;
int rv, n, bcnt;
#ifdef TPM_DEBUG
aprint_debug_dev(sc->sc_dev, "%s: len %zu\n", __func__, len);
#endif
cnt = 0;
while (len > 0) {
if ((rv = tpm_waitfor(sc, TPM_STS_DATA_AVAIL | TPM_STS_VALID,
TPM_READ_TMO, sc->sc_read)))
return rv;
bcnt = tpm_getburst(sc);
n = MIN(len, bcnt);
#ifdef TPM_DEBUG
aprint_debug_dev(sc->sc_dev,
"%s: fetching %d, burst is %d\n", __func__, n, bcnt);
#endif
for (; n--; len--) {
*p++ = bus_space_read_1(sc->sc_bt, sc->sc_bh, TPM_DATA);
cnt++;
}
if ((flags & TPM_PARAM_SIZE) == 0 && cnt >= 6)
break;
}
#ifdef TPM_DEBUG
aprint_debug_dev(sc->sc_dev,
"%s: read %zu bytes, len %zu\n", __func__, cnt, len);
#endif
if (count)
*count = cnt;
return 0;
}
int
tpm_tis12_write(struct tpm_softc *sc, const void *buf, size_t len)
{
const uint8_t *p = buf;
size_t cnt;
int rv, r;
#ifdef TPM_DEBUG
aprint_debug_dev(sc->sc_dev,
"%s: sc %p buf %p len %zu\n", __func__, sc, buf, len);
#endif
if (len == 0)
return 0;
if ((rv = tpm_request_locality(sc, 0)) != 0)
return rv;
cnt = 0;
while (cnt < len - 1) {
for (r = tpm_getburst(sc); r > 0 && cnt < len - 1; r--) {
bus_space_write_1(sc->sc_bt, sc->sc_bh, TPM_DATA, *p++);
cnt++;
}
if ((rv = tpm_waitfor(sc, TPM_STS_VALID, TPM_READ_TMO, sc))) {
#ifdef TPM_DEBUG
aprint_debug_dev(sc->sc_dev,
"%s: failed burst rv %d\n", __func__, rv);
#endif
return rv;
}
sc->sc_stat = tpm_status(sc);
if (!(sc->sc_stat & TPM_STS_DATA_EXPECT)) {
#ifdef TPM_DEBUG
char sbuf[128];
snprintb(sbuf, sizeof(sbuf), TPM_STS_BITS, sc->sc_stat);
aprint_debug_dev(sc->sc_dev,
"%s: failed rv %d stat=%s\n", __func__, rv, sbuf);
#endif
return EIO;
}
}
bus_space_write_1(sc->sc_bt, sc->sc_bh, TPM_DATA, *p++);
cnt++;
if ((rv = tpm_waitfor(sc, TPM_STS_VALID, TPM_READ_TMO, sc))) {
#ifdef TPM_DEBUG
aprint_debug_dev(sc->sc_dev, "%s: failed last byte rv %d\n",
__func__, rv);
#endif
return rv;
}
if ((sc->sc_stat & TPM_STS_DATA_EXPECT) != 0) {
#ifdef TPM_DEBUG
char sbuf[128];
snprintb(sbuf, sizeof(sbuf), TPM_STS_BITS, sc->sc_stat);
aprint_debug_dev(sc->sc_dev,
"%s: failed rv %d stat=%s\n", __func__, rv, sbuf);
#endif
return EIO;
}
#ifdef TPM_DEBUG
aprint_debug_dev(sc->sc_dev, "%s: wrote %zu byte\n", __func__, cnt);
#endif
return 0;
}
