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Diffstat (limited to 'drivers/of/of_pci_irq.c')
-rw-r--r--drivers/of/of_pci_irq.c131
1 files changed, 0 insertions, 131 deletions
diff --git a/drivers/of/of_pci_irq.c b/drivers/of/of_pci_irq.c
deleted file mode 100644
index 3a05568f65df..000000000000
--- a/drivers/of/of_pci_irq.c
+++ /dev/null
@@ -1,131 +0,0 @@
-#include <linux/kernel.h>
-#include <linux/of_pci.h>
-#include <linux/of_irq.h>
-#include <linux/export.h>
-
-/**
- * of_irq_parse_pci - Resolve the interrupt for a PCI device
- * @pdev: the device whose interrupt is to be resolved
- * @out_irq: structure of_irq filled by this function
- *
- * This function resolves the PCI interrupt for a given PCI device. If a
- * device-node exists for a given pci_dev, it will use normal OF tree
- * walking. If not, it will implement standard swizzling and walk up the
- * PCI tree until an device-node is found, at which point it will finish
- * resolving using the OF tree walking.
- */
-int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args *out_irq)
-{
- struct device_node *dn, *ppnode;
- struct pci_dev *ppdev;
- __be32 laddr[3];
- u8 pin;
- int rc;
-
- /* Check if we have a device node, if yes, fallback to standard
- * device tree parsing
- */
- dn = pci_device_to_OF_node(pdev);
- if (dn) {
- rc = of_irq_parse_one(dn, 0, out_irq);
- if (!rc)
- return rc;
- }
-
- /* 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)
- goto err;
- /* No pin, exit with no error message. */
- if (pin == 0)
- return -ENODEV;
-
- /* Now we walk up the PCI tree */
- for (;;) {
- /* Get the pci_dev of our parent */
- ppdev = pdev->bus->self;
-
- /* Ouch, it's a host bridge... */
- if (ppdev == NULL) {
- ppnode = pci_bus_to_OF_node(pdev->bus);
-
- /* No node for host bridge ? give up */
- if (ppnode == NULL) {
- rc = -EINVAL;
- goto err;
- }
- } 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
- */
- pin = pci_swizzle_interrupt_pin(pdev, pin);
- pdev = ppdev;
- }
-
- out_irq->np = ppnode;
- out_irq->args_count = 1;
- out_irq->args[0] = pin;
- laddr[0] = cpu_to_be32((pdev->bus->number << 16) | (pdev->devfn << 8));
- laddr[1] = laddr[2] = cpu_to_be32(0);
- rc = of_irq_parse_raw(laddr, out_irq);
- if (rc)
- goto err;
- return 0;
-err:
- if (rc == -ENOENT) {
- dev_warn(&pdev->dev,
- "%s: no interrupt-map found, INTx interrupts not available\n",
- __func__);
- pr_warn_once("%s: possibly some PCI slots don't have level triggered interrupts capability\n",
- __func__);
- } else {
- dev_err(&pdev->dev, "%s: failed with rc=%d\n", __func__, rc);
- }
- return rc;
-}
-EXPORT_SYMBOL_GPL(of_irq_parse_pci);
-
-/**
- * of_irq_parse_and_map_pci() - Decode a PCI irq from the device tree and map to a virq
- * @dev: The pci device needing an irq
- * @slot: PCI slot number; passed when used as map_irq callback. Unused
- * @pin: PCI irq pin number; passed when used as map_irq callback. Unused
- *
- * @slot and @pin are unused, but included in the function so that this
- * function can be used directly as the map_irq callback to
- * pci_assign_irq() and struct pci_host_bridge.map_irq pointer
- */
-int of_irq_parse_and_map_pci(const struct pci_dev *dev, u8 slot, u8 pin)
-{
- struct of_phandle_args oirq;
- int ret;
-
- ret = of_irq_parse_pci(dev, &oirq);
- if (ret)
- return 0; /* Proper return code 0 == NO_IRQ */
-
- return irq_create_of_mapping(&oirq);
-}
-EXPORT_SYMBOL_GPL(of_irq_parse_and_map_pci);
-