diff options
| author | Pyun YongHyeon <yongari@FreeBSD.org> | 2004-10-13 06:04:01 +0000 |
|---|---|---|
| committer | Pyun YongHyeon <yongari@FreeBSD.org> | 2004-10-13 06:04:01 +0000 |
| commit | a2f4d2f5b04aca52040a2a362106f77614945df5 (patch) | |
| tree | 4fa983d4c981e06f2f218e9ec02a2f1febad7b7e /sys/dev | |
| parent | eba1cb6e3e34878681a43eca3a2887001daea7db (diff) | |
Notes
Diffstat (limited to 'sys/dev')
| -rw-r--r-- | sys/dev/sound/pci/t4dwave.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sys/dev/sound/pci/t4dwave.c b/sys/dev/sound/pci/t4dwave.c index 8622951283c0a..8bcc588f3958a 100644 --- a/sys/dev/sound/pci/t4dwave.c +++ b/sys/dev/sound/pci/t4dwave.c @@ -43,6 +43,16 @@ SND_DECLARE_FILE("$FreeBSD$"); #define TR_DEFAULT_BUFSZ 0x1000 #define TR_TIMEOUT_CDC 0xffff #define TR_MAXPLAYCH 4 +/* + * Though, it's not clearly documented in trident datasheet, trident + * audio cards can't handle DMA addresses located above 1GB. The LBA + * (loop begin address) register which holds DMA base address is 32bits + * register. + * But the MSB 2bits are used for other purposes(I guess it is really + * bad idea). This effectivly limits the DMA address space up to 1GB. + */ +#define TR_MAXADDR ((1 << 30) - 1) + struct tr_info; @@ -851,7 +861,7 @@ tr_pci_attach(device_t dev) } if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/2, /*boundary*/0, - /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, + /*lowaddr*/TR_MAXADDR, /*highaddr*/BUS_SPACE_MAXADDR, /*filter*/NULL, /*filterarg*/NULL, /*maxsize*/tr->bufsz, /*nsegments*/1, /*maxsegz*/0x3ffff, |