//----------------------------------------------------------------------------
// create all declared isa devices
int pcan_create_isa_devices(char* type, u32 io, u16 irq)
{
int result = 0;
struct pcandev *dev = NULL;
// create isa devices
DPRINTK(KERN_DEBUG "%s: pcan_create_isa_devices(0x%x, %d)\n", DEVICE_NAME, io, irq);
if ((dev = (struct pcandev *)kmalloc(sizeof(struct pcandev), GFP_KERNEL)) == NULL)
{
result = -ENOMEM;
goto fail;
}
pcan_soft_init(dev, type, HW_ISA_SJA);
dev->device_open = sja1000_open;
dev->device_write = sja1000_write;
dev->device_release = sja1000_release;
result = pcan_isa_init(dev, io, irq);
if (!result)
result = sja1000_probe(dev);
if (result)
{
dev->cleanup(dev);
kfree(dev);
goto fail;
}
else
{
dev->ucPhysicallyInstalled = 1;
list_add_tail(&dev->list, &pcan_drv.devices); // add this device to the list
pcan_drv.wDeviceCount++;
}
fail:
if (result)
DPRINTK(KERN_DEBUG "%s: pcan_create_isa_devices() failed!\n", DEVICE_NAME);
else
DPRINTK(KERN_DEBUG "%s: pcan_create_isa_devices() is OK\n", DEVICE_NAME);
return result;
}
//----------------------------------------------------------------------------
// is called by pcan_open() and pcan_netdev_open()
int pcan_open_path(PCAN_OPEN_PATH_ARGS)
{
int err = 0;
DPRINTK(KERN_DEBUG "%s: pcan_open_path, minor = %d, path = %d.\n",
DEVICE_NAME, dev->nMinor, dev->nOpenPaths);
// only the 1st open to this device makes a default init on this device
if (!dev->nOpenPaths) {
// empty all FIFOs
err = pcan_fifo_reset(&dev->writeFifo);
if (err)
return err;
err = pcan_fifo_reset(&dev->readFifo);
if (err)
return err;
// open the interface special parts
err = dev->open(dev);
if (err) {
DPRINTK(KERN_DEBUG
"%s: can't open interface special parts!\n",
DEVICE_NAME);
return err;
}
/*
* special handling: probe here only for dongle devices,
* connect after init is possible
*/
if ((dev->wType == HW_DONGLE_SJA) ||
(dev->wType == HW_DONGLE_SJA_EPP)) {
err = sja1000_probe(dev); // no usb here, generic sja1000 call for dongle
if (err) {
DPRINTK(KERN_ERR
"%s: %s-dongle device minor %d not found (io=0x%04x,irq=%d)\n",
DEVICE_NAME, dev->type, dev->nMinor,
dev->port.dng.dwPort,
dev->port.dng.wIrq);
dev->release(dev);
return err;
}
}
// install irq
err = dev->req_irq(REQ_IRQ_ARG);
if (err) {
DPRINTK(KERN_DEBUG
"%s: can't request irq from device!\n",
DEVICE_NAME);
return err;
}
// open the device itself
err = dev->device_open(dev, dev->wBTR0BTR1, dev->ucCANMsgType,
dev->ucListenOnly);
if (err) {
DPRINTK(KERN_DEBUG
"%s: can't open device hardware itself!\n",
DEVICE_NAME);
return err;
}
}
dev->nOpenPaths++;
DPRINTK(KERN_DEBUG "%s: pcan_open_path() is OK\n", DEVICE_NAME);
return 0;
}
