static status_t
device_open(const char* name, uint32 /*flags*/, void** cookie)
{
status_t status = B_OK;
TRACE("device_open() - name: %s\n", name);
// Find the device name in the list of devices.
int32 i = 0;
while (gDeviceNames[i] != NULL && (strcmp(name, gDeviceNames[i]) != 0))
i++;
if (gDeviceNames[i] == NULL)
return B_BAD_VALUE; // device name not found in list of devices
DeviceInfo& di = gDeviceInfo[i];
gLock.Acquire(); // make sure no one else has write access to common data
if (di.openCount == 0)
status = InitDevice(di);
gLock.Release();
if (status == B_OK) {
di.openCount++; // mark device open
*cookie = &di; // send cookie to opener
}
TRACE("device_open() returning 0x%lx, open count: %ld\n", status,
di.openCount);
return status;
}
static status_t
device_free(void* dev)
{
DeviceInfo& di = *((DeviceInfo*)dev);
SharedInfo& si = *(di.sharedInfo);
pci_info& pciInfo = di.pciInfo;
TRACE("enter device_free()\n");
gLock.Acquire(); // lock driver
// If opened multiple times, merely decrement the open count and exit.
if (di.openCount <= 1) {
DisableVBI(); // disable & clear any pending interrupts
if (si.bInterruptAssigned) {
remove_io_interrupt_handler(pciInfo.u.h0.interrupt_line,
InterruptHandler, &di);
}
// Delete the semaphores, ignoring any errors because the owning team
// may have died.
if (si.vertBlankSem >= 0)
delete_sem(si.vertBlankSem);
si.vertBlankSem = -1;
UnmapDevice(di); // free regs and frame buffer areas
delete_area(di.sharedArea);
di.sharedArea = -1;
di.sharedInfo = NULL;
}
if (di.openCount > 0)
di.openCount--; // mark device available
gLock.Release(); // unlock driver
TRACE("exit device_free() openCount: %ld\n", di.openCount);
return B_OK;
}
status_t device_free(void *dev)
{
LogFlowFunc(("device_free\n"));
DeviceInfo& di = *(DeviceInfo *)dev;
gLock.Acquire();
if (di.openCount <= 1)
{
// TODO deinit device!
delete_area(di.sharedArea);
di.sharedArea = -1;
di.sharedInfo = NULL;
}
if (di.openCount > 0)
di.openCount--;
gLock.Release();
return B_OK;
}
