Do not allocate all of ports 0x80 - 0x8f for isadma (hint: delay)

diff --git a/sys/dev/isa/isadma.c b/sys/dev/isa/isadma.c
index a16240d..ce39255 100644 (file)
--- a/sys/dev/isa/isadma.c
+++ b/sys/dev/isa/isadma.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: isadma.c,v 1.10 1996/11/29 22:55:01 niklas Exp $      */
+/*     $OpenBSD: isadma.c,v 1.11 1996/12/11 12:57:31 niklas Exp $      */
 /*     $NetBSD: isadma.c,v 1.19 1996/04/29 20:03:26 christos Exp $     */
 
 #include <sys/param.h>
@@ -33,7 +33,7 @@ static struct dma_info dma_info[8];
 static u_int8_t dma_finished;
 
 /* high byte of address is stored in this port for i-th dma channel */
-static int dmapageport[2][4] = {
+static bus_addr_t dmapageport[2][4] = {
        {0x7, 0x3, 0x1, 0x2},
        {0xf, 0xb, 0x9, 0xa}
 };
@@ -54,7 +54,7 @@ struct isadma_softc {
        bus_space_tag_t sc_iot;
        bus_space_handle_t sc_ioh1;
        bus_space_handle_t sc_ioh2;
-       bus_space_handle_t sc_iohpg;
+       bus_space_handle_t sc_dmapageioh[2][4];
 };
 
 struct cfattach isadma_ca = {
@@ -86,6 +86,7 @@ isadmaattach(parent, self, aux)
        struct isa_attach_args *ia = aux;
        bus_space_tag_t iot;
        bus_space_handle_t ioh;
+       int i;
 
        printf("\n");
        iot = sc->sc_iot = ia->ia_iot;
@@ -95,9 +96,13 @@ isadmaattach(parent, self, aux)
        if (bus_space_map(iot, IO_DMA2, DMA_NREGS(2), 0, &ioh))
                panic("isadmaattach: couldn't map I/O ports at IO_DMA2");
        sc->sc_ioh2 = ioh;
-       if (bus_space_map(iot, IO_DMAPG, 16 /* XXX */, 0, &ioh))
-               panic("isadmaattach: couldn't map I/O ports at IO_DMAPG");
-       sc->sc_iohpg = ioh;
+
+       /* XXX the constants below is a bit ugly, I know... */
+       for (i = 0; i < 8; i++) {
+               if (bus_space_map(iot, IO_DMAPG + dmapageport[i % 2][i / 2], 1,
+                   0, &sc->sc_dmapageioh[i % 2][i / 2]))
+                       panic("isadmaattach: couldn't map DMA page I/O port");
+       }
        isadma_sc = sc;
 }
 
@@ -207,8 +212,8 @@ isadma_start(addr, nbytes, chan, flags)
 
        /* send start address */
        waport = DMA_CHN(dma_unit, chan);
-       bus_space_write_1(iot, sc->sc_iohpg,
-           dmapageport[dma_unit - 1][chan], di->phys[0].addr>>16);
+       bus_space_write_1(iot, sc->sc_dmapageioh[dma_unit - 1][chan], 0,
+           di->phys[0].addr>>16);
        bus_space_write_1(iot, ioh, waport, di->phys[0].addr);
        bus_space_write_1(iot, ioh, waport, di->phys[0].addr>>8);