diff options
| author |   deraadt <deraadt@openbsd.org> | 1999-03-04 08:57:33 +0000 |
|---|---|---|
| committer | deraadt <deraadt@openbsd.org> | 1999-03-04 08:57:33 +0000 |
| commit | 1620e8b7921ec5b17d6e13a38faee775f23ec3b0 (patch) | |
| tree | a56dbe371873399e9481900c21fa814782041311 /sys/dev/isa/isapnp.c | |
| parent | sync (diff) | |
| download | wireguard-openbsd-1620e8b7921ec5b17d6e13a38faee775f23ec3b0.tar.xz wireguard-openbsd-1620e8b7921ec5b17d6e13a38faee775f23ec3b0.zip | |
cs4232 hack
Diffstat (limited to 'sys/dev/isa/isapnp.c')
| -rw-r--r-- | sys/dev/isa/isapnp.c | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/sys/dev/isa/isapnp.c b/sys/dev/isa/isapnp.c index e9b8dabaee9..79bc15688a7 100644 --- a/sys/dev/isa/isapnp.c +++ b/sys/dev/isa/isapnp.c @@ -1,4 +1,4 @@ -/* $OpenBSD: isapnp.c,v 1.23 1999/01/11 01:57:53 millert Exp $ */ +/* $OpenBSD: isapnp.c,v 1.24 1999/03/04 08:57:34 deraadt Exp $ */ /* $NetBSD: isapnp.c,v 1.9.4.3 1997/10/29 00:40:43 thorpej Exp $ */ /* @@ -48,6 +48,10 @@ #include <dev/isa/pnpdevs.h> +#ifdef CONFIG_CS4232 +#include <dev/isa/cs4232.h> +#endif + void isapnp_init __P((struct isapnp_softc *)); static __inline u_char isapnp_shift_bit __P((struct isapnp_softc *)); int isapnp_findcard __P((struct isapnp_softc *)); @@ -813,6 +817,38 @@ isapnp_isa_attach_hook(isa_sc) if (isapnp_map(&sc)) return; +#ifdef CONFIG_CS4232 + /* + * XXX XXX + * This a totally disgusting hack, but I can't figure out another way. + * It seems that many CS audio chips have a bug (as far as I can + * understand). The reset below does not really reset the chip, it + * remains in a catatonic state and will not respond when probed. + * The chip can be used both as a WSS and as a SB device, and a + * single read at the WSS address (0x534) takes it out of this + * non-responsive state. + * The read has to happen at this point in time (or earlier) so + * it cannot be moved to the wss_isapnp.c driver. + * (BTW, We're not alone in having problems with these chips: + * Windoze 98 couldn't detect the sound chip on a Dell when I tried.) + * + * Lennart Augustsson <augustss@netbsd.org> + * + * (Implementation from John Kohl <jtk@kolvir.arlington.ma.us>) + */ + { + bus_space_handle_t ioh; + int rv; + + if ((rv = bus_space_map(sc.sc_iot, 0x534, 1, 0, &ioh)) == 0) { + DPRINTF(("wss probe kludge\n")); + (void)bus_space_read_1(sc.sc_iot, ioh, 0); + bus_space_unmap(sc.sc_iot, ioh, 1); + } else { + DPRINTF(("wss probe kludge failed to map: %d\n", rv)); + } + } +#endif isapnp_init(&sc); isapnp_write_reg(&sc, ISAPNP_CONFIG_CONTROL, ISAPNP_CC_RESET_DRV); @@ -838,6 +874,9 @@ isapnp_match(parent, match, aux) sc.sc_ncards = 0; (void) strcpy(sc.sc_dev.dv_xname, "(isapnp probe)"); +#ifdef CONFIG_CS4232 + probe_cs4232(); +#endif if (isapnp_map(&sc)) return 0; |