static int electra_cf_probe()

in electra_cf.c [175:308]

• 108 lines of code
• 16 McCabe index (conditional complexity)

static int electra_cf_probe(struct platform_device *ofdev)
{
	struct device *device = &ofdev->dev;
	struct device_node *np = ofdev->dev.of_node;
	struct electra_cf_socket   *cf;
	struct resource mem, io;
	int status = -ENOMEM;
	const unsigned int *prop;
	int err;

	err = of_address_to_resource(np, 0, &mem);
	if (err)
		return -EINVAL;

	err = of_address_to_resource(np, 1, &io);
	if (err)
		return -EINVAL;

	cf = kzalloc(sizeof(*cf), GFP_KERNEL);
	if (!cf)
		return -ENOMEM;

	timer_setup(&cf->timer, electra_cf_timer, 0);
	cf->irq = 0;

	cf->ofdev = ofdev;
	cf->mem_phys = mem.start;
	cf->mem_size = PAGE_ALIGN(resource_size(&mem));
	cf->mem_base = ioremap(cf->mem_phys, cf->mem_size);
	if (!cf->mem_base)
		goto out_free_cf;
	cf->io_size = PAGE_ALIGN(resource_size(&io));
	cf->io_virt = ioremap_phb(io.start, cf->io_size);
	if (!cf->io_virt)
		goto out_unmap_mem;

	cf->gpio_base = ioremap(0xfc103000, 0x1000);
	if (!cf->gpio_base)
		goto out_unmap_virt;
	dev_set_drvdata(device, cf);

	cf->io_base = (unsigned long)cf->io_virt - VMALLOC_END;
	cf->iomem.start = (unsigned long)cf->mem_base;
	cf->iomem.end = (unsigned long)cf->mem_base + (mem.end - mem.start);
	cf->iomem.flags = IORESOURCE_MEM;

	cf->irq = irq_of_parse_and_map(np, 0);

	status = request_irq(cf->irq, electra_cf_irq, IRQF_SHARED,
			     driver_name, cf);
	if (status < 0) {
		dev_err(device, "request_irq failed\n");
		goto fail1;
	}

	cf->socket.pci_irq = cf->irq;

	status = -EINVAL;

	prop = of_get_property(np, "card-detect-gpio", NULL);
	if (!prop)
		goto fail1;
	cf->gpio_detect = *prop;

	prop = of_get_property(np, "card-vsense-gpio", NULL);
	if (!prop)
		goto fail1;
	cf->gpio_vsense = *prop;

	prop = of_get_property(np, "card-3v-gpio", NULL);
	if (!prop)
		goto fail1;
	cf->gpio_3v = *prop;

	prop = of_get_property(np, "card-5v-gpio", NULL);
	if (!prop)
		goto fail1;
	cf->gpio_5v = *prop;

	cf->socket.io_offset = cf->io_base;

	/* reserve chip-select regions */
	if (!request_mem_region(cf->mem_phys, cf->mem_size, driver_name)) {
		status = -ENXIO;
		dev_err(device, "Can't claim memory region\n");
		goto fail1;
	}

	if (!request_region(cf->io_base, cf->io_size, driver_name)) {
		status = -ENXIO;
		dev_err(device, "Can't claim I/O region\n");
		goto fail2;
	}

	cf->socket.owner = THIS_MODULE;
	cf->socket.dev.parent = &ofdev->dev;
	cf->socket.ops = &electra_cf_ops;
	cf->socket.resource_ops = &pccard_static_ops;
	cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP |
				SS_CAP_MEM_ALIGN;
	cf->socket.map_size = 0x800;

	status = pcmcia_register_socket(&cf->socket);
	if (status < 0) {
		dev_err(device, "pcmcia_register_socket failed\n");
		goto fail3;
	}

	dev_info(device, "at mem 0x%lx io 0x%llx irq %d\n",
		 cf->mem_phys, io.start, cf->irq);

	cf->active = 1;
	electra_cf_timer(&cf->timer);
	return 0;

fail3:
	release_region(cf->io_base, cf->io_size);
fail2:
	release_mem_region(cf->mem_phys, cf->mem_size);
fail1:
	if (cf->irq)
		free_irq(cf->irq, cf);

	iounmap(cf->gpio_base);
out_unmap_virt:
	device_init_wakeup(&ofdev->dev, 0);
	iounmap(cf->io_virt);
out_unmap_mem:
	iounmap(cf->mem_base);
out_free_cf:
	kfree(cf);
	return status;

}