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Exclude Enhanced Apple Sound Chip (EASC) without support for wavetable mode 

used by asc(4).
This commit is contained in:
flxd 2017-10-12 09:48:53 +00:00
parent 45be2dc76a
commit e004f9f088
1 changed files with 18 additions and 4 deletions
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22
sys/arch/mac68k/obio/asc.c
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@ -1,4 +1,4 @@
/* $NetBSD: asc.c,v 1.57 2014/07/25 08:10:34 dholland Exp $ */
/* $NetBSD: asc.c,v 1.58 2017/10/12 09:48:53 flxd Exp $ */
/*
* Copyright (C) 1997 Scott Reynolds
@ -64,7 +64,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: asc.c,v 1.57 2014/07/25 08:10:34 dholland Exp $");
__KERNEL_RCSID(0, "$NetBSD: asc.c,v 1.58 2017/10/12 09:48:53 flxd Exp $");
#include <sys/types.h>
#include <sys/errno.h>
@ -135,6 +135,8 @@ const struct cdevsw asc_cdevsw = {
.d_flag = 0
};
static const uint8_t easc_version_tab[] = { 0xb0 };
static int
ascmatch(device_t parent, cfdata_t cf, void *aux)
{
@ -142,6 +144,7 @@ ascmatch(device_t parent, cfdata_t cf, void *aux)
bus_addr_t addr;
bus_space_handle_t bsh;
int rval = 0;
uint8_t ver;
if (oa->oa_addr != (-1))
addr = (bus_addr_t)oa->oa_addr;
@ -155,9 +158,20 @@ ascmatch(device_t parent, cfdata_t cf, void *aux)
if (bus_space_map(oa->oa_tag, addr, MAC68K_ASC_LEN, 0, &bsh))
return (0);
if (mac68k_bus_space_probe(oa->oa_tag, bsh, 0, 1))
if (mac68k_bus_space_probe(oa->oa_tag, bsh, 0, 1)) {
rval = 1;
else
/*
* Enhanced Apple Sound Chip (EASC) does not support wavetable
* mode, exclude it for now.
*/
ver = bus_space_read_1(oa->oa_tag, bsh, 0x800);
for (size_t i = 0; i < __arraycount(easc_version_tab); i++)
if (ver == easc_version_tab[i]) {
rval = 0;
break;
}
} else
rval = 0;
bus_space_unmap(oa->oa_tag, bsh, MAC68K_ASC_LEN);