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Always emply the NCO to attenuate jitter. The Receive clock recovery

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circuit generates too much jitter to be used directly as xmit clock.

Don't miscount pending bytes in weird error conditions.

Drop the rest of a packet if we run out of tx-md's.

Trig the xmit-frame signal on rising edge, this fixed the one-bit-too-late
position of the HDLC frames in E1 mode.
This commit is contained in:
Poul-Henning Kamp 2000-11-04 23:23:27 +00:00
parent 2004645454
commit baef67f10f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=68337
1 changed files with 12 additions and 13 deletions
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25
sys/dev/musycc/musycc.c
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@ -395,20 +395,15 @@ init_ctrl(struct softc *sc)
else
sc->ram->grcd |= 0x00000000; /* !OOFABT */
#if 0
sc->ram->grcd |= 0x00000010; /* MSKOOF */
#endif
sc->ram->grcd |= 0x00000020; /* MSKCOFA */
sc->ram->grcd |= 0x00000400; /* POLLTH=1 */
#if 0
sc->ram->grcd |= 0x00008000; /* SFALIGN */
#endif
sc->ram->mpd = 0; /* Memory Protection NI [5-18] */
sc->ram->pcd = 0x0000001; /* PORTMD=1 (E1/32ts) */
sc->ram->pcd |= 0x0000000; /* XXX */
sc->ram->pcd |= 1 << 5; /* TSYNC_EDGE */
sc->ram->pcd |= 1 << 9; /* TRITX */
/* Message length descriptor */
/* XXX: MTU */
@ -505,7 +500,7 @@ init_8370(struct softc *sc)
if (sc->clocksource == INT)
p[0x002] = 0x40; /* JAT_CR - XXX */
else
p[0x002] = 0x00; /* JAT_CR - XXX */
p[0x002] = 0x20; /* JAT_CR - XXX */
p[0x00D] = 0x01; /* IER6 - ONESEC */
p[0x014] = 0x00; /* LOOP - */
p[0x015] = 0x00; /* DL3_TS - */
@ -516,7 +511,7 @@ init_8370(struct softc *sc)
if (sc->clocksource == INT)
p[0x01A] = 0x37; /* CMUX - RSBCKI(RSBCKI), TSBCKI(CLADO), CLADO(RCKO), TCKI(CLADO) */
else
p[0x01A] = 0x15; /* CMUX - RSBCKI(RSBCKI), TSBCKI(RSBCKI), CLADO(RCKO), TCKI(RCKO) */
p[0x01A] = 0x37; /* CMUX - RSBCKI(RSBCKI), TSBCKI(RSBCKI), CLADO(RCKO), TCKI(RCKO) */
/* I.431/G.775 */
p[0x020] = 0x41; /* LIU_CR - SQUELCH */
@ -613,13 +608,13 @@ musycc_intr0_tx_eom(struct softc *sc, int ch)
status = md->status;
if (status & 0x80000000)
break; /* Not our mdesc, done */
md->data = 0;
m = md->m;
if (m) {
if (m != NULL) {
sch->tx_pending -= m->m_pkthdr.len;
m_freem(m);
md->m = NULL;
}
md->m = NULL;
md->data = 0;
md->status = 0;
if (++sch->tx_last_md >= sch->nmd)
sch->tx_last_md = 0;
@ -1077,6 +1072,10 @@ musycc_rcvdata(hook_p hook, struct mbuf *m, meta_p meta, struct mbuf **ret_m, me
while (len) {
if (m->m_len > 0) { /* XXX: needed ? */
md = &sc->mdt[ch][sch->tx_next_md];
if ((md->status & 0x80000000) != 0x00000000) {
printf("Out of tx md\n");
break;
}
if (++sch->tx_next_md >= sch->nmd)
sch->tx_next_md = 0;
@ -1089,13 +1088,13 @@ musycc_rcvdata(hook_p hook, struct mbuf *m, meta_p meta, struct mbuf **ret_m, me
} else {
u |= 1 << 29; /* EOM */
md->m = m2;
sch->tx_pending += m2->m_pkthdr.len;
}
u |= m->m_len;
md->status = u;
}
m = m->m_next;
}
sch->tx_pending += m2->m_pkthdr.len;
return (0);
}