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Allow the range of a SCC class to be 0. This gives all child

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devices the same (overlapping) I/O range. This is useful for
embedded communications controllers like the CPM of various
models of the PowerQUICC.
This commit is contained in:
Marcel Moolenaar 2007-03-28 06:45:33 +00:00
parent 92931013f6
commit abb3d233c4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=167973
1 changed files with 7 additions and 5 deletions
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12
sys/dev/scc/scc_core.c
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@ -103,7 +103,7 @@ scc_bfe_attach(device_t dev)
struct scc_softc *sc, *sc0;
const char *sep;
bus_space_handle_t bh;
u_long base, size, start;
u_long base, size, start, sz;
int c, error, mode, sysdev;
/*
@ -155,6 +155,7 @@ scc_bfe_attach(device_t dev)
*/
sysdev = 0;
base = rman_get_start(sc->sc_rres);
sz = (size != 0) ? size : rman_get_size(sc->sc_rres);
start = base + ((cl->cl_range < 0) ? size * (cl->cl_channels - 1) : 0);
for (c = 0; c < cl->cl_channels; c++) {
ch = &sc->sc_chan[c];
@ -162,11 +163,11 @@ scc_bfe_attach(device_t dev)
ch->ch_nr = c + 1;
resource_list_add(&ch->ch_rlist, sc->sc_rtype, 0, start,
start + size - 1, size);
start + sz - 1, sz);
rle = resource_list_find(&ch->ch_rlist, sc->sc_rtype, 0);
rle->res = &ch->ch_rres;
bus_space_subregion(rman_get_bustag(sc->sc_rres),
rman_get_bushandle(sc->sc_rres), start - base, size, &bh);
rman_get_bushandle(sc->sc_rres), start - base, sz, &bh);
rman_set_bushandle(rle->res, bh);
rman_set_bustag(rle->res, rman_get_bustag(sc->sc_rres));
@ -336,7 +337,7 @@ scc_bfe_probe(device_t dev, u_int regshft, u_int rclk, u_int rid)
{
struct scc_softc *sc;
struct scc_class *cl;
u_long size;
u_long size, sz;
int error;
/*
@ -378,9 +379,10 @@ scc_bfe_probe(device_t dev, u_int regshft, u_int rclk, u_int rid)
* Fill in the bus access structure and call the hardware specific
* probe method.
*/
sz = (size != 0) ? size : rman_get_size(sc->sc_rres);
sc->sc_bas.bsh = rman_get_bushandle(sc->sc_rres);
sc->sc_bas.bst = rman_get_bustag(sc->sc_rres);
sc->sc_bas.range = size;
sc->sc_bas.range = sz;
sc->sc_bas.rclk = rclk;
sc->sc_bas.regshft = regshft;