*/
#include <common.h>
+#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
#include <malloc.h>
writeb(irq, irq_router.ibase + LINK_N2V(link, base));
}
-static inline void fill_irq_info(struct irq_info **slotp, int *entries, u8 bus,
- u8 device, u8 pin, u8 pirq)
+static struct irq_info *check_dup_entry(struct irq_info *slot_base,
+ int entry_num, int bus, int device)
{
- struct irq_info *slot = *slotp;
+ struct irq_info *slot = slot_base;
+ int i;
+
+ for (i = 0; i < entry_num; i++) {
+ if (slot->bus == bus && slot->devfn == (device << 3))
+ break;
+ slot++;
+ }
+ return (i == entry_num) ? NULL : slot;
+}
+
+static inline void fill_irq_info(struct irq_info *slot, int bus, int device,
+ int pin, int pirq)
+{
slot->bus = bus;
slot->devfn = (device << 3) | 0;
slot->irq[pin - 1].link = LINK_N2V(pirq, irq_router.link_base);
slot->irq[pin - 1].bitmap = irq_router.irq_mask;
- (*entries)++;
- (*slotp)++;
}
-__weak void cpu_irq_init(void)
-{
- return;
-}
-
-static int create_pirq_routing_table(void)
+static int create_pirq_routing_table(struct udevice *dev)
{
const void *blob = gd->fdt_blob;
struct fdt_pci_addr addr;
int len, count;
const u32 *cell;
struct irq_routing_table *rt;
- struct irq_info *slot;
+ struct irq_info *slot, *slot_base;
int irq_entries = 0;
+ int parent;
int i;
int ret;
- node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_IRQ_ROUTER);
- if (node < 0) {
- debug("%s: Cannot find irq router node\n", __func__);
- return -EINVAL;
- }
-
- ret = fdtdec_get_pci_addr(blob, node, FDT_PCI_SPACE_CONFIG,
+ node = dev->of_offset;
+ parent = dev->parent->of_offset;
+ ret = fdtdec_get_pci_addr(blob, parent, FDT_PCI_SPACE_CONFIG,
"reg", &addr);
if (ret)
return ret;
return -EINVAL;
}
- ret = fdtdec_get_int_array(blob, node, "intel,pirq-link",
- &irq_router.link_base, 1);
- if (ret)
+ ret = fdtdec_get_int(blob, node, "intel,pirq-link", -1);
+ if (ret == -1)
return ret;
+ irq_router.link_base = ret;
irq_router.irq_mask = fdtdec_get_int(blob, node,
"intel,pirq-mask", PIRQ_BITMAP);
}
cell = fdt_getprop(blob, node, "intel,pirq-routing", &len);
- if (!cell)
+ if (!cell || len % sizeof(struct pirq_routing))
return -EINVAL;
+ count = len / sizeof(struct pirq_routing);
- if ((len % sizeof(struct pirq_routing)) == 0)
- count = len / sizeof(struct pirq_routing);
- else
- return -EINVAL;
-
- rt = malloc(sizeof(struct irq_routing_table));
+ rt = calloc(1, sizeof(struct irq_routing_table));
if (!rt)
return -ENOMEM;
- memset((char *)rt, 0, sizeof(struct irq_routing_table));
/* Populate the PIRQ table fields */
rt->signature = PIRQ_SIGNATURE;
rt->rtr_vendor = PCI_VENDOR_ID_INTEL;
rt->rtr_device = PCI_DEVICE_ID_INTEL_ICH7_31;
- slot = rt->slots;
+ slot_base = rt->slots;
/* Now fill in the irq_info entries in the PIRQ table */
- for (i = 0; i < count; i++) {
+ for (i = 0; i < count;
+ i++, cell += sizeof(struct pirq_routing) / sizeof(u32)) {
struct pirq_routing pr;
pr.bdf = fdt_addr_to_cpu(cell[0]);
i, PCI_BUS(pr.bdf), PCI_DEV(pr.bdf),
PCI_FUNC(pr.bdf), 'A' + pr.pin - 1,
'A' + pr.pirq);
- fill_irq_info(&slot, &irq_entries, PCI_BUS(pr.bdf),
- PCI_DEV(pr.bdf), pr.pin, pr.pirq);
- cell += sizeof(struct pirq_routing) / sizeof(u32);
+
+ slot = check_dup_entry(slot_base, irq_entries,
+ PCI_BUS(pr.bdf), PCI_DEV(pr.bdf));
+ if (slot) {
+ debug("found entry for bus %d device %d, ",
+ PCI_BUS(pr.bdf), PCI_DEV(pr.bdf));
+
+ if (slot->irq[pr.pin - 1].link) {
+ debug("skipping\n");
+
+ /*
+ * Sanity test on the routed PIRQ pin
+ *
+ * If they don't match, show a warning to tell
+ * there might be something wrong with the PIRQ
+ * routing information in the device tree.
+ */
+ if (slot->irq[pr.pin - 1].link !=
+ LINK_N2V(pr.pirq, irq_router.link_base))
+ debug("WARNING: Inconsistent PIRQ routing information\n");
+ continue;
+ }
+ } else {
+ slot = slot_base + irq_entries++;
+ }
+ debug("writing INT%c\n", 'A' + pr.pin - 1);
+ fill_irq_info(slot, PCI_BUS(pr.bdf), PCI_DEV(pr.bdf), pr.pin,
+ pr.pirq);
}
rt->size = irq_entries * sizeof(struct irq_info) + 32;
return 0;
}
-void pirq_init(void)
+int irq_router_common_init(struct udevice *dev)
{
- cpu_irq_init();
+ int ret;
- if (create_pirq_routing_table()) {
+ ret = create_pirq_routing_table(dev);
+ if (ret) {
debug("Failed to create pirq routing table\n");
- } else {
- /* Route PIRQ */
- pirq_route_irqs(pirq_routing_table->slots,
- get_irq_slot_count(pirq_routing_table));
+ return ret;
}
+ /* Route PIRQ */
+ pirq_route_irqs(pirq_routing_table->slots,
+ get_irq_slot_count(pirq_routing_table));
+
+ return 0;
+}
+
+int irq_router_probe(struct udevice *dev)
+{
+ return irq_router_common_init(dev);
}
u32 write_pirq_routing_table(u32 addr)
return copy_pirq_routing_table(addr, pirq_routing_table);
}
+
+static const struct udevice_id irq_router_ids[] = {
+ { .compatible = "intel,irq-router" },
+ { }
+};
+
+U_BOOT_DRIVER(irq_router_drv) = {
+ .name = "intel_irq",
+ .id = UCLASS_IRQ,
+ .of_match = irq_router_ids,
+ .probe = irq_router_probe,
+};
+
+UCLASS_DRIVER(irq) = {
+ .id = UCLASS_IRQ,
+ .name = "irq",
+};