int of_irq_to_resource(struct device_node *dev, int index, struct resource *r)
{
	struct of_irq out_irq;
	int irq;
	int res;

	res = of_irq_map_one(dev, index, &out_irq);

	/* Get irq for the device */
	if (res) {
		pr_debug("IRQ not found... code = %d", res);
		return NO_IRQ;
	}
	/* Assuming single interrupt controller... */
	irq = out_irq.specifier[0];

	pr_debug("IRQ found = %d", irq);

	/* Only dereference the resource if both the
	 * resource and the irq are valid. */
	if (r && irq != NO_IRQ) {
		r->start = r->end = irq;
		r->flags = IORESOURCE_IRQ;
	}

	return irq;
}
Exemplo n.º 2
0
static int __init spu_map_interrupts(struct spu *spu, struct device_node *np)
{
	struct of_irq oirq;
	int ret;
	int i;

	for (i=0; i < 3; i++) {
		ret = of_irq_map_one(np, i, &oirq);
		if (ret) {
			pr_debug("spu_new: failed to get irq %d\n", i);
			goto err;
		}
		ret = -EINVAL;
		pr_debug("  irq %d no 0x%x on %s\n", i, oirq.specifier[0],
			 oirq.controller->full_name);
		spu->irqs[i] = irq_create_of_mapping(oirq.controller,
					oirq.specifier, oirq.size);
		if (spu->irqs[i] == NO_IRQ) {
			pr_debug("spu_new: failed to map it !\n");
			goto err;
		}
	}
	return 0;

err:
	pr_debug("failed to map irq %x for spu %s\n", *oirq.specifier,
		spu->name);
	for (; i >= 0; i--) {
		if (spu->irqs[i] != NO_IRQ)
			irq_dispose_mapping(spu->irqs[i]);
	}
	return ret;
}
Exemplo n.º 3
0
unsigned int irq_of_parse_and_map(struct device_node *dev, int index)
{
	struct of_irq oirq;

	if (of_irq_map_one(dev, index, &oirq))
		return NO_IRQ;

	return oirq.specifier[0];
}
Exemplo n.º 4
0
static void request_ras_irqs(struct device_node *np,
			irqreturn_t (*handler)(int, void *, struct pt_regs *),
			const char *name)
{
	int i, index, count = 0;
	struct of_irq oirq;
	u32 *opicprop;
	unsigned int opicplen;
	unsigned int virqs[16];

	/* Check for obsolete "open-pic-interrupt" property. If present, then
	 * map those interrupts using the default interrupt host and default
	 * trigger
	 */
	opicprop = (u32 *)get_property(np, "open-pic-interrupt", &opicplen);
	if (opicprop) {
		opicplen /= sizeof(u32);
		for (i = 0; i < opicplen; i++) {
			if (count > 15)
				break;
			virqs[count] = irq_create_mapping(NULL, *(opicprop++));
			if (virqs[count] == NO_IRQ)
				printk(KERN_ERR "Unable to allocate interrupt "
				       "number for %s\n", np->full_name);
			else
				count++;

		}
	}
	/* Else use normal interrupt tree parsing */
	else {
		/* First try to do a proper OF tree parsing */
		for (index = 0; of_irq_map_one(np, index, &oirq) == 0;
		     index++) {
			if (count > 15)
				break;
			virqs[count] = irq_create_of_mapping(oirq.controller,
							    oirq.specifier,
							    oirq.size);
			if (virqs[count] == NO_IRQ)
				printk(KERN_ERR "Unable to allocate interrupt "
				       "number for %s\n", np->full_name);
			else
				count++;
		}
	}

	/* Now request them */
	for (i = 0; i < count; i++) {
		if (request_irq(virqs[i], handler, 0, name, NULL)) {
			printk(KERN_ERR "Unable to request interrupt %d for "
			       "%s\n", virqs[i], np->full_name);
			return;
		}
	}
}
Exemplo n.º 5
0
unsigned int irq_of_parse_and_map(struct device_node *dev, int index)
{
	struct of_irq oirq;

	if (of_irq_map_one(dev, index, &oirq))
		return 0;

	return irq_create_of_mapping(oirq.controller, oirq.specifier,
				     oirq.size);
}
static void __init msm_dt_timer_init(void)
{
	struct device_node *node;
	struct resource res;
	struct of_irq oirq;

	node = of_find_compatible_node(NULL, NULL, "qcom,msm-qtimer");
	if (!node) {
		pr_err("no matching timer node found\n");
		return;
	}

	if (of_irq_map_one(node, 0, &oirq)) {
		pr_err("interrupt not specified in timer node\n");
	} else {
		res.start = res.end = oirq.specifier[0];
		res.flags = IORESOURCE_IRQ;
		arch_timer_register(&res, 1);
	}
	of_node_put(node);
}
Exemplo n.º 7
0
static int of_isp1760_probe(struct platform_device *dev)
{
	struct isp1760 *drvdata;
	struct device_node *dp = dev->dev.of_node;
	struct resource *res;
	struct resource memory;
	struct of_irq oirq;
	int virq;
	resource_size_t res_len;
	int ret;
	const unsigned int *prop;
	unsigned int devflags = 0;
	enum of_gpio_flags gpio_flags;

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

	ret = of_address_to_resource(dp, 0, &memory);
	if (ret)
		return -ENXIO;

	res_len = resource_size(&memory);

	res = request_mem_region(memory.start, res_len, dev_name(&dev->dev));
	if (!res)
		return -EBUSY;

	if (of_irq_map_one(dp, 0, &oirq)) {
		ret = -ENODEV;
		goto release_reg;
	}

	virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
			oirq.size);

	if (of_device_is_compatible(dp, "nxp,usb-isp1761"))
		devflags |= ISP1760_FLAG_ISP1761;

	/* Some systems wire up only 16 of the 32 data lines */
	prop = of_get_property(dp, "bus-width", NULL);
	if (prop && *prop == 16)
		devflags |= ISP1760_FLAG_BUS_WIDTH_16;

	if (of_get_property(dp, "port1-otg", NULL) != NULL)
		devflags |= ISP1760_FLAG_OTG_EN;

	if (of_get_property(dp, "analog-oc", NULL) != NULL)
		devflags |= ISP1760_FLAG_ANALOG_OC;

	if (of_get_property(dp, "dack-polarity", NULL) != NULL)
		devflags |= ISP1760_FLAG_DACK_POL_HIGH;

	if (of_get_property(dp, "dreq-polarity", NULL) != NULL)
		devflags |= ISP1760_FLAG_DREQ_POL_HIGH;

	drvdata->rst_gpio = of_get_gpio_flags(dp, 0, &gpio_flags);
	if (gpio_is_valid(drvdata->rst_gpio)) {
		ret = gpio_request(drvdata->rst_gpio, dev_name(&dev->dev));
		if (!ret) {
			if (!(gpio_flags & OF_GPIO_ACTIVE_LOW)) {
				devflags |= ISP1760_FLAG_RESET_ACTIVE_HIGH;
				gpio_direction_output(drvdata->rst_gpio, 0);
			} else {
				gpio_direction_output(drvdata->rst_gpio, 1);
			}
		} else {
			drvdata->rst_gpio = ret;
		}
	}

	drvdata->hcd = isp1760_register(memory.start, res_len, virq,
					IRQF_SHARED, drvdata->rst_gpio,
					&dev->dev, dev_name(&dev->dev),
					devflags);
	if (IS_ERR(drvdata->hcd)) {
		ret = PTR_ERR(drvdata->hcd);
		goto free_gpio;
	}

	dev_set_drvdata(&dev->dev, drvdata);
	return ret;

free_gpio:
	if (gpio_is_valid(drvdata->rst_gpio))
		gpio_free(drvdata->rst_gpio);
release_reg:
	release_mem_region(memory.start, res_len);
	kfree(drvdata);
	return ret;
}
Exemplo n.º 8
0
int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
{
	struct device_node *dn, *ppnode;
	struct pci_dev *ppdev;
	u32 lspec;
	u32 laddr[3];
	u8 pin;
	int rc;

	/* Check if we have a device node, if yes, fallback to standard OF
	 * parsing
	 */
	dn = pci_device_to_OF_node(pdev);
	if (dn)
		return of_irq_map_one(dn, 0, out_irq);

	/* Ok, we don't, time to have fun. Let's start by building up an
	 * interrupt spec.  we assume #interrupt-cells is 1, which is standard
	 * for PCI. If you do different, then don't use that routine.
	 */
	rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
	if (rc != 0)
		return rc;
	/* No pin, exit */
	if (pin == 0)
		return -ENODEV;

	/* Now we walk up the PCI tree */
	lspec = pin;
	for (;;) {
		/* Get the pci_dev of our parent */
		ppdev = pdev->bus->self;

		/* Ouch, it's a host bridge... */
		if (ppdev == NULL) {
			struct pci_controller *host;
			host = pci_bus_to_host(pdev->bus);
			ppnode = host ? host->dn : NULL;
			/* No node for host bridge ? give up */
			if (ppnode == NULL)
				return -EINVAL;
		} else
			/* We found a P2P bridge, check if it has a node */
			ppnode = pci_device_to_OF_node(ppdev);

		/* Ok, we have found a parent with a device-node, hand over to
		 * the OF parsing code.
		 * We build a unit address from the linux device to be used for
		 * resolution. Note that we use the linux bus number which may
		 * not match your firmware bus numbering.
		 * Fortunately, in most cases, interrupt-map-mask doesn't
		 * include the bus number as part of the matching.
		 * You should still be careful about that though if you intend
		 * to rely on this function (you ship  a firmware that doesn't
		 * create device nodes for all PCI devices).
		 */
		if (ppnode)
			break;

		/* We can only get here if we hit a P2P bridge with no node,
		 * let's do standard swizzling and try again
		 */
		lspec = pci_swizzle_interrupt_pin(pdev, lspec);
		pdev = ppdev;
	}

	laddr[0] = (pdev->bus->number << 16)
		| (pdev->devfn << 8);
	laddr[1]  = laddr[2] = 0;
	return of_irq_map_raw(ppnode, &lspec, 1, laddr, out_irq);
}
Exemplo n.º 9
0
static int of_isp1760_probe(struct platform_device *dev,
		const struct of_device_id *match)
{
	struct usb_hcd *hcd;
	struct device_node *dp = dev->dev.of_node;
	struct resource *res;
	struct resource memory;
	struct of_irq oirq;
	int virq;
	resource_size_t res_len;
	int ret;
	const unsigned int *prop;
	unsigned int devflags = 0;

	ret = of_address_to_resource(dp, 0, &memory);
	if (ret)
		return -ENXIO;

	res_len = resource_size(&memory);

	res = request_mem_region(memory.start, res_len, dev_name(&dev->dev));
	if (!res)
		return -EBUSY;

	if (of_irq_map_one(dp, 0, &oirq)) {
		ret = -ENODEV;
		goto release_reg;
	}

	virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
			oirq.size);

	if (of_device_is_compatible(dp, "nxp,usb-isp1761"))
		devflags |= ISP1760_FLAG_ISP1761;

	/* Some systems wire up only 16 of the 32 data lines */
	prop = of_get_property(dp, "bus-width", NULL);
	if (prop && *prop == 16)
		devflags |= ISP1760_FLAG_BUS_WIDTH_16;

	if (of_get_property(dp, "port1-otg", NULL) != NULL)
		devflags |= ISP1760_FLAG_OTG_EN;

	if (of_get_property(dp, "analog-oc", NULL) != NULL)
		devflags |= ISP1760_FLAG_ANALOG_OC;

	if (of_get_property(dp, "dack-polarity", NULL) != NULL)
		devflags |= ISP1760_FLAG_DACK_POL_HIGH;

	if (of_get_property(dp, "dreq-polarity", NULL) != NULL)
		devflags |= ISP1760_FLAG_DREQ_POL_HIGH;

	hcd = isp1760_register(memory.start, res_len, virq,
		IRQF_SHARED | IRQF_DISABLED, &dev->dev, dev_name(&dev->dev),
		devflags);
	if (IS_ERR(hcd)) {
		ret = PTR_ERR(hcd);
		goto release_reg;
	}

	dev_set_drvdata(&dev->dev, hcd);
	return ret;

release_reg:
	release_mem_region(memory.start, res_len);
	return ret;
}
Exemplo n.º 10
0
void request_event_sources_irqs(struct device_node *np,
				irq_handler_t handler,
				const char *name)
{
	int i, index, count = 0;
	struct of_irq oirq;
	const u32 *opicprop;
	unsigned int opicplen;
	unsigned int virqs[16];

	/*                                                                   
                                                                     
           
  */
	opicprop = of_get_property(np, "open-pic-interrupt", &opicplen);
	if (opicprop) {
		opicplen /= sizeof(u32);
		for (i = 0; i < opicplen; i++) {
			if (count > 15)
				break;
			virqs[count] = irq_create_mapping(NULL, *(opicprop++));
			if (virqs[count] == NO_IRQ) {
				pr_err("event-sources: Unable to allocate "
				       "interrupt number for %s\n",
				       np->full_name);
				WARN_ON(1);
			}
			else
				count++;

		}
	}
	/*                                        */
	else {
		/*                                          */
		for (index = 0; of_irq_map_one(np, index, &oirq) == 0;
		     index++) {
			if (count > 15)
				break;
			virqs[count] = irq_create_of_mapping(oirq.controller,
							    oirq.specifier,
							    oirq.size);
			if (virqs[count] == NO_IRQ) {
				pr_err("event-sources: Unable to allocate "
				       "interrupt number for %s\n",
				       np->full_name);
				WARN_ON(1);
			}
			else
				count++;
		}
	}

	/*                  */
	for (i = 0; i < count; i++) {
		if (request_irq(virqs[i], handler, 0, name, NULL)) {
			pr_err("event-sources: Unable to request interrupt "
			       "%d for %s\n", virqs[i], np->full_name);
			WARN_ON(1);
			return;
		}
	}
}