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dont spin on MDIO

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This commit is contained in:
aiju 2020-01-10 20:43:24 +00:00
parent 9ab87f6241
commit ffd9c39d1c
1 changed files with 8 additions and 4 deletions
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12
sys/src/9/cycv/ethercycv.c
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@ -87,18 +87,22 @@ struct Ctlr {
static void
mdwrite(Ctlr *c, int r, u16int v)
{
while((c->r[GMII_ADDRESS] & 1<<0) != 0);
while((c->r[GMII_ADDRESS] & 1<<0) != 0)
tsleep(&up->sleep, return0, nil, 1);
c->r[GMII_DATA] = v;
c->r[GMII_ADDRESS] = 1<<11 | (r&31)<<6 | 1<<1 | 1<<0;
while((c->r[GMII_ADDRESS] & 1<<0) != 0);
while((c->r[GMII_ADDRESS] & 1<<0) != 0)
tsleep(&up->sleep, return0, nil, 1);
}
static u16int
mdread(Ctlr *c, int r)
{
while((c->r[GMII_ADDRESS] & 1<<0) != 0);
while((c->r[GMII_ADDRESS] & 1<<0) != 0)
tsleep(&up->sleep, return0, nil, 1);
c->r[GMII_ADDRESS] = 1<<11 | (r&31)<<6 | 1<<0;
while((c->r[GMII_ADDRESS] & 1<<0) != 0);
while((c->r[GMII_ADDRESS] & 1<<0) != 0)
tsleep(&up->sleep, return0, nil, 1);
return c->r[GMII_DATA];
}