diff options
Diffstat (limited to 'sys/dev/pci/lofn.c')
| -rw-r--r-- | sys/dev/pci/lofn.c | 38 |
1 files changed, 33 insertions, 5 deletions
diff --git a/sys/dev/pci/lofn.c b/sys/dev/pci/lofn.c index da38fbd7fb4..05a2b2c9ee7 100644 --- a/sys/dev/pci/lofn.c +++ b/sys/dev/pci/lofn.c @@ -1,4 +1,4 @@ -/* $OpenBSD: lofn.c,v 1.2 2001/06/26 03:54:31 jason Exp $ */ +/* $OpenBSD: lofn.c,v 1.3 2001/06/26 05:16:45 jason Exp $ */ /* * Copyright (c) 2001 Jason L. Wright (jason@thought.net) @@ -135,7 +135,13 @@ lofn_attach(parent, self, aux) goto fail_io; } - printf("\n"); + /* Enable RNG */ + WRITE_REG_0(sc, LOFN_REL_IER, + READ_REG_0(sc, LOFN_REL_IER) | LOFN_IER_RDY); + WRITE_REG_0(sc, LOFN_REL_CFG2, + READ_REG_0(sc, LOFN_REL_CFG2) | LOFN_CFG2_RNGENA); + + printf(": %s\n", intrstr); return; @@ -145,8 +151,30 @@ fail_io: } int -lofn_intr(arg) - void *arg; +lofn_intr(vsc) + void *vsc; { - return (0); + struct lofn_softc *sc = vsc; + u_int32_t sr; + int r = 0, i; + + sr = READ_REG_0(sc, LOFN_REL_SR); + + if (sr & LOFN_SR_RNG_UF) { + r = 1; + printf("%s: rng underflow (disabling)\n", sc->sc_dv.dv_xname); + WRITE_REG_0(sc, LOFN_REL_CFG2, + READ_REG_0(sc, LOFN_REL_CFG2) & (~LOFN_CFG2_RNGENA)); + WRITE_REG_0(sc, LOFN_REL_IER, + READ_REG_0(sc, LOFN_REL_IER) & (~LOFN_IER_RDY)); + } else if (sr & LOFN_SR_RNG_RDY) { + r = 1; + + bus_space_read_region_4(sc->sc_st, sc->sc_sh, 0x1080, + sc->sc_rngbuf, LOFN_RNGBUF_SIZE); + for (i = 0; i < LOFN_RNGBUF_SIZE; i++) + add_true_randomness(sc->sc_rngbuf[i]); + } + + return (r); } |