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| author | smpatel <smpatel@FreeBSD.org> | 1996-04-08 19:40:57 +0000 |
|---|---|---|
| committer | smpatel <smpatel@FreeBSD.org> | 1996-04-08 19:40:57 +0000 |
| commit | 9739208301bc36d96e6ef8313564ffab2b3f9672 (patch) | |
| tree | 04abd4e981231946f91239e5c13892fc0164eae0 /sys/i386/isa/asc.c | |
| parent | 6b740ac6e985dfbea2d7e3601a151a088b4bb8c0 (diff) | |
| download | FreeBSD-src-9739208301bc36d96e6ef8313564ffab2b3f9672.zip FreeBSD-src-9739208301bc36d96e6ef8313564ffab2b3f9672.tar.gz | |
Update drivers to use isa_dma_acquire() and isa_dma_release()
Reviewed by: bde
Diffstat (limited to 'sys/i386/isa/asc.c')
| -rw-r--r-- | sys/i386/isa/asc.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/sys/i386/isa/asc.c b/sys/i386/isa/asc.c index a6eca29..da8c7a2 100644 --- a/sys/i386/isa/asc.c +++ b/sys/i386/isa/asc.c @@ -34,7 +34,7 @@ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* - * $Id: asc.c,v 1.16 1996/01/27 00:53:55 bde Exp $ + * $Id: asc.c,v 1.17 1996/03/28 14:28:35 scrappy Exp $ */ #include "asc.h" @@ -604,6 +604,9 @@ ascopen(dev_t dev, int flags, int fmt, struct proc *p) lprintf("asc%d.open: already open", unit); return EBUSY; } + if (isa_dma_acquire(scu->dma_num)) + return(EBUSY); + scu->flags = ATTACHED | OPEN; asc_reset(scu); @@ -668,6 +671,7 @@ ascclose(dev_t dev, int flags, int fmt, struct proc *p) scu->cfg_byte &= ~ scu->int_byte ; /* disable scanner int */ outb(ASC_CFG, scu->cfg_byte); /* --- disable dma controller ? --- */ + isa_dma_release(scu->dma_num); /* --- disable interrupts on the controller (sub_24) --- */ scu->sbuf.base = NULL; |
