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o The ricoh bridge needs us to turn off the function interrupts for

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16-bit cards when we're powering them up.  Other bridges may have
  similar issues, so we do this for all of them by setting the
  interrupt in the PCIC register 3 to be 0 (done always anyway)
  and turning on the bit in the bridge control register to route these
  interrupts via the ISA bus (or via the interrupt configured in the
  PCIC register 3).  '0' means disable completely.  There's a small
  chance this may interfere with the o2micro power hacks, but I'll
  wait for reports to come in from o2micro users.
o Expand some of the comments about why we do certain things.

# this gets rid of the interrupt storm warnings on my 505TS.  I think
# that we may need to do something similar on suspend, but I'm unsure
# since I don't have a laptop that supports suspened/resume with a
# ricoh chipset in it.
This commit is contained in:
imp 2005-07-17 19:40:05 +00:00
parent f69c4458ba
commit 9b222cbe2a
1 changed files with 22 additions and 12 deletions
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34
sys/dev/pccbb/pccbb.c
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@ -731,7 +731,9 @@ cbb_o2micro_power_hack(struct cbb_softc *sc)
* because our controllers don't generate IRQ1.
*
* Other, non O2Micro controllers will generate irq 1 in some
* situations, so we can't do this hack for everybody.
* situations, so we can't do this hack for everybody. Reports of
* keyboard controller's interrupts being suppressed occurred when
* we did this.
*/
reg = exca_getb(&sc->exca[0], EXCA_INTR);
exca_putb(&sc->exca[0], EXCA_INTR, (reg & 0xf0) | 1);
@ -798,12 +800,19 @@ cbb_power(device_t brdev, int volts)
/*
* We have to mask the card change detect interrupt while we're
* messing with the power. It is allowed to bounce while we're
* messing with power as things settle down.
* messing with power as things settle down. In addition, we mask off
* the card's function interrupt by routing it via the ISA bus. This
* bit generally only affects 16bit cards. Some bridges allow one to
* set another bit to have it also affect 32bit cards. Since 32bit
* cards are required to be better behaved, we don't bother to get
* into those bridge specific features.
*/
mask = cbb_get(sc, CBB_SOCKET_MASK);
mask |= CBB_SOCKET_MASK_POWER;
mask &= ~CBB_SOCKET_MASK_CD;
cbb_set(sc, CBB_SOCKET_MASK, mask);
PCI_MASK_CONFIG(brdev, CBBR_BRIDGECTRL,
|CBBM_BRIDGECTRL_INTR_IREQ_ISA_EN, 2);
cbb_set(sc, CBB_SOCKET_CONTROL, sock_ctrl);
if (on) {
mtx_lock(&sc->mtx);
@ -818,16 +827,15 @@ cbb_power(device_t brdev, int volts)
}
/*
* After the power is good, we can turn off the power
* interrupt. However, the PC Card standard says that we must
* delay turning the CD bit back on for a bit to allow for
* bouncyness on power down (recall that we don't wait above
* for a power down, since we don't get an interrupt for
* that). We're called either from the suspend code in which
* case we don't want to turn card change on again, or we're
* called from the card insertion code, in which case the cbb
* thread will turn it on for us before it waits to be woken
* by a change event.
* After the power is good, we can turn off the power interrupt.
* However, the PC Card standard says that we must delay turning the
* CD bit back on for a bit to allow for bouncyness on power down
* (recall that we don't wait above for a power down, since we don't
* get an interrupt for that). We're called either from the suspend
* code in which case we don't want to turn card change on again, or
* we're called from the card insertion code, in which case the cbb
* thread will turn it on for us before it waits to be woken by a
* change event.
*/
cbb_clrb(sc, CBB_SOCKET_MASK, CBB_SOCKET_MASK_POWER);
status = cbb_get(sc, CBB_SOCKET_STATE);
@ -840,6 +848,8 @@ cbb_power(device_t brdev, int volts)
/* XXX Do we want to do something to mitigate things here? */
goto done;
}
PCI_MASK_CONFIG(brdev, CBBR_BRIDGECTRL,
& ~CBBM_BRIDGECTRL_INTR_IREQ_ISA_EN, 2);
retval = 1;
done:;
if (volts != 0 && sc->chipset == CB_O2MICRO)