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Make debugging easier by tracing only status changes.

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Always first disable interrupts on a device that can be
selected, then check for invalid status.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30426 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Marcus Overhagen 2009-04-26 12:55:52 +00:00
parent 926160e8ac
commit 5bfd73fb71
1 changed files with 20 additions and 8 deletions
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28
src/add-ons/kernel/bus_managers/ata/ATAChannel.cpp
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@ -323,12 +323,6 @@ ATAChannel::Reset(bool *presence, uint16 *signatures)
for (uint8 i = 0; i < deviceCount; i++) {
SelectDevice(i);
if (AltStatus() == 0xff) {
TRACE_ALWAYS("illegal status value for device %d,"
" assuming not present\n", i);
continue;
}
if (SelectedDevice() != i) {
TRACE_ALWAYS("cannot select device %d, assuming not present\n", i);
continue;
@ -337,6 +331,12 @@ ATAChannel::Reset(bool *presence, uint16 *signatures)
// ensure interrupts are disabled for this device
_WriteControl(ATA_DEVICE_CONTROL_DISABLE_INTS);
if (AltStatus() == 0xff) {
TRACE_ALWAYS("illegal status value for device %d,"
" assuming not present\n", i);
continue;
}
// wait up to 31 seconds for busy to clear
if (Wait(0, ATA_STATUS_BUSY, 0, 31 * 1000 * 1000) != B_OK) {
TRACE_ERROR("device %d reset timeout\n", i);
@ -388,6 +388,9 @@ ATAChannel::Wait(uint8 setBits, uint8 clearedBits, uint32 flags,
TRACE("waiting for set bits 0x%02x and cleared bits 0x%02x\n",
setBits, clearedBits);
#if ATA_TRACING
unsigned lastStatus = 0x100;
#endif
while (true) {
uint8 status = AltStatus();
if ((flags & ATA_CHECK_ERROR_BIT) != 0
@ -410,9 +413,18 @@ ATAChannel::Wait(uint8 setBits, uint8 clearedBits, uint32 flags,
}
bigtime_t elapsedTime = system_time() - startTime;
TRACE("wait status after %lld: 0x%02x\n", elapsedTime, status);
if (elapsedTime > timeout)
#if ATA_TRACING
if (lastStatus != status) {
TRACE("wait status after %lld: 0x%02x\n", elapsedTime, status);
lastStatus = status;
}
#endif
if (elapsedTime > timeout) {
TRACE("timeout, wait status after %lld: 0x%02x\n",
elapsedTime, status);
return B_TIMED_OUT;
}
// The device may be ready almost immediatelly. If it isn't,
// poll often during the first 20ms, otherwise poll lazyly.