static int pcan_dongle_probe(struct pcandev *dev) // probe for type
{
int result = 0;
DPRINTK(KERN_DEBUG "%s: pcan_dongle_probe()\n", DEVICE_NAME);
result = ___request_region(dev->port.dng.dwPort, DNG_PORT_SIZE, DEVICE_NAME);
if (!result)
{
dev->wInitStep = 1;
if (dev->wType == HW_DONGLE_SJA_EPP)
{
result = ___request_region(dev->port.dng.wEcr, ECR_PORT_SIZE, DEVICE_NAME);
if (!result)
dev->wInitStep = 2;
}
}
return result;
}
static int pcan_isa_init(struct pcandev *dev, u32 dwPort, u16 wIrq)
{
int err = 0;
DPRINTK(KERN_DEBUG "%s: pcan_isa_init(), isa_devices = %d\n", DEVICE_NAME, isa_devices);
// init process wait queues
init_waitqueue_head(&dev->read_queue);
init_waitqueue_head(&dev->write_queue);
// set this before any instructions, fill struct pcandev, part 1
dev->wInitStep = 0;
dev->readreg = pcan_isa_readreg;
dev->writereg = pcan_isa_writereg;
dev->cleanup = pcan_isa_cleanup;
dev->req_irq = pcan_isa_req_irq;
dev->free_irq = pcan_isa_free_irq;
dev->open = pcan_isa_open;
dev->release = pcan_isa_release;
dev->filter = pcan_create_filter_chain();
// reject illegal combination
if ((!dwPort && wIrq) || (dwPort && !wIrq))
return -EINVAL;
// a default is requested
if (!dwPort)
{
// there's no default available
if (isa_devices >= ISA_DEFAULT_COUNT)
return -ENODEV;
dev->port.isa.dwPort = isa_ports[isa_devices];
dev->port.isa.wIrq = isa_irqs[isa_devices];
}
else
{
dev->port.isa.dwPort = dwPort;
dev->port.isa.wIrq = wIrq;
}
dev->nMajor = pcan_drv.nMajor;
dev->nMinor = PCAN_ISA_MINOR_BASE + isa_devices;
// request address range reservation
err = ___request_region(dev->port.isa.dwPort, ISA_PORT_SIZE, DEVICE_NAME);
if (err)
return err;
dev->wInitStep = 1;
dev->wInitStep = 2;
INIT_SAME_IRQ_LIST();
isa_devices++;
dev->wInitStep = 3;
printk(KERN_INFO "%s: isa device minor %d expected (io=0x%04x,irq=%d)\n", DEVICE_NAME, dev->nMinor, dev->port.isa.dwPort, dev->port.isa.wIrq);
return 0;
}