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@@ -0,0 +1,1025 @@
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+#undef DEBUG
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+
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+#include <linux/kernel.h>
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+#include <linux/string.h>
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+#include <linux/pci_regs.h>
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+#include <linux/module.h>
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+#include <linux/ioport.h>
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+#include <linux/etherdevice.h>
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+#include <asm/prom.h>
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+#include <asm/pci-bridge.h>
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+
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+#define PRu64 "%llx"
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+
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+/* Max address size we deal with */
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+#define OF_MAX_ADDR_CELLS 4
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+#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
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+ (ns) > 0)
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+
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+static struct of_bus *of_match_bus(struct device_node *np);
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+static int __of_address_to_resource(struct device_node *dev,
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+ const u32 *addrp, u64 size, unsigned int flags,
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+ struct resource *r);
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+
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+/* Debug utility */
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+#ifdef DEBUG
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+static void of_dump_addr(const char *s, const u32 *addr, int na)
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+{
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+ printk(KERN_INFO "%s", s);
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+ while (na--)
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+ printk(KERN_INFO " %08x", *(addr++));
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+ printk(KERN_INFO "\n");
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+}
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+#else
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+static void of_dump_addr(const char *s, const u32 *addr, int na) { }
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+#endif
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+
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+/* Callbacks for bus specific translators */
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+struct of_bus {
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+ const char *name;
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+ const char *addresses;
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+ int (*match)(struct device_node *parent);
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+ void (*count_cells)(struct device_node *child,
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+ int *addrc, int *sizec);
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+ u64 (*map)(u32 *addr, const u32 *range,
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+ int na, int ns, int pna);
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+ int (*translate)(u32 *addr, u64 offset, int na);
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+ unsigned int (*get_flags)(const u32 *addr);
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+};
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+
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+/*
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+ * Default translator (generic bus)
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+ */
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+
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+static void of_bus_default_count_cells(struct device_node *dev,
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+ int *addrc, int *sizec)
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+{
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+ if (addrc)
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+ *addrc = of_n_addr_cells(dev);
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+ if (sizec)
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+ *sizec = of_n_size_cells(dev);
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+}
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+
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+static u64 of_bus_default_map(u32 *addr, const u32 *range,
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+ int na, int ns, int pna)
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+{
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+ u64 cp, s, da;
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+
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+ cp = of_read_number(range, na);
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+ s = of_read_number(range + na + pna, ns);
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+ da = of_read_number(addr, na);
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+
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+ pr_debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
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+ cp, s, da);
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+
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+ if (da < cp || da >= (cp + s))
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+ return OF_BAD_ADDR;
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+ return da - cp;
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+}
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+
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+static int of_bus_default_translate(u32 *addr, u64 offset, int na)
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+{
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+ u64 a = of_read_number(addr, na);
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+ memset(addr, 0, na * 4);
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+ a += offset;
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+ if (na > 1)
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+ addr[na - 2] = a >> 32;
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+ addr[na - 1] = a & 0xffffffffu;
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+
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+ return 0;
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+}
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+
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+static unsigned int of_bus_default_get_flags(const u32 *addr)
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+{
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+ return IORESOURCE_MEM;
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+}
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+
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+#ifdef CONFIG_PCI
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+/*
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+ * PCI bus specific translator
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+ */
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+
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+static int of_bus_pci_match(struct device_node *np)
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+{
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+ /* "vci" is for the /chaos bridge on 1st-gen PCI powermacs */
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+ return !strcmp(np->type, "pci") || !strcmp(np->type, "vci");
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+}
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+
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+static void of_bus_pci_count_cells(struct device_node *np,
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+ int *addrc, int *sizec)
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+{
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+ if (addrc)
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+ *addrc = 3;
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+ if (sizec)
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+ *sizec = 2;
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+}
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+
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+static u64 of_bus_pci_map(u32 *addr, const u32 *range, int na, int ns, int pna)
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+{
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+ u64 cp, s, da;
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+
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+ /* Check address type match */
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+ if ((addr[0] ^ range[0]) & 0x03000000)
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+ return OF_BAD_ADDR;
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+
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+ /* Read address values, skipping high cell */
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+ cp = of_read_number(range + 1, na - 1);
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+ s = of_read_number(range + na + pna, ns);
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+ da = of_read_number(addr + 1, na - 1);
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+
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+ pr_debug("OF: PCI map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da);
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+
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+ if (da < cp || da >= (cp + s))
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+ return OF_BAD_ADDR;
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+ return da - cp;
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+}
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+
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+static int of_bus_pci_translate(u32 *addr, u64 offset, int na)
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+{
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+ return of_bus_default_translate(addr + 1, offset, na - 1);
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+}
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+
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+static unsigned int of_bus_pci_get_flags(const u32 *addr)
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+{
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+ unsigned int flags = 0;
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+ u32 w = addr[0];
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+
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+ switch ((w >> 24) & 0x03) {
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+ case 0x01:
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+ flags |= IORESOURCE_IO;
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+ break;
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+ case 0x02: /* 32 bits */
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+ case 0x03: /* 64 bits */
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+ flags |= IORESOURCE_MEM;
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+ break;
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+ }
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+ if (w & 0x40000000)
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+ flags |= IORESOURCE_PREFETCH;
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+ return flags;
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+}
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+
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+const u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size,
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+ unsigned int *flags)
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+{
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+ const u32 *prop;
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+ unsigned int psize;
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+ struct device_node *parent;
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+ struct of_bus *bus;
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+ int onesize, i, na, ns;
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+
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+ /* Get parent & match bus type */
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+ parent = of_get_parent(dev);
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+ if (parent == NULL)
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+ return NULL;
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+ bus = of_match_bus(parent);
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+ if (strcmp(bus->name, "pci")) {
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+ of_node_put(parent);
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+ return NULL;
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+ }
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+ bus->count_cells(dev, &na, &ns);
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+ of_node_put(parent);
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+ if (!OF_CHECK_COUNTS(na, ns))
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+ return NULL;
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+
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+ /* Get "reg" or "assigned-addresses" property */
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+ prop = of_get_property(dev, bus->addresses, &psize);
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+ if (prop == NULL)
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+ return NULL;
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+ psize /= 4;
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+
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+ onesize = na + ns;
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+ for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++)
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+ if ((prop[0] & 0xff) == ((bar_no * 4) + PCI_BASE_ADDRESS_0)) {
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+ if (size)
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+ *size = of_read_number(prop + na, ns);
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+ if (flags)
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+ *flags = bus->get_flags(prop);
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+ return prop;
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+ }
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+ return NULL;
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+}
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+EXPORT_SYMBOL(of_get_pci_address);
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+
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+int of_pci_address_to_resource(struct device_node *dev, int bar,
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+ struct resource *r)
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+{
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+ const u32 *addrp;
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+ u64 size;
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+ unsigned int flags;
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+
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+ addrp = of_get_pci_address(dev, bar, &size, &flags);
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+ if (addrp == NULL)
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+ return -EINVAL;
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+ return __of_address_to_resource(dev, addrp, size, flags, r);
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+}
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+EXPORT_SYMBOL_GPL(of_pci_address_to_resource);
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+
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+static u8 of_irq_pci_swizzle(u8 slot, u8 pin)
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+{
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+ return (((pin - 1) + slot) % 4) + 1;
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+}
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+
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+int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
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+{
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+ struct device_node *dn, *ppnode;
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+ struct pci_dev *ppdev;
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+ u32 lspec;
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+ u32 laddr[3];
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+ u8 pin;
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+ int rc;
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+
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+ /* Check if we have a device node, if yes, fallback to standard OF
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+ * parsing
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+ */
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+ dn = pci_device_to_OF_node(pdev);
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+ if (dn)
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+ return of_irq_map_one(dn, 0, out_irq);
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+
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+ /* Ok, we don't, time to have fun. Let's start by building up an
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+ * interrupt spec. we assume #interrupt-cells is 1, which is standard
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+ * for PCI. If you do different, then don't use that routine.
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+ */
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+ rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
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+ if (rc != 0)
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+ return rc;
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+ /* No pin, exit */
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+ if (pin == 0)
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+ return -ENODEV;
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+
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+ /* Now we walk up the PCI tree */
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+ lspec = pin;
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+ for (;;) {
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+ /* Get the pci_dev of our parent */
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+ ppdev = pdev->bus->self;
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+
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+ /* Ouch, it's a host bridge... */
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+ if (ppdev == NULL) {
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+ struct pci_controller *host;
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+ host = pci_bus_to_host(pdev->bus);
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+ ppnode = host ? host->arch_data : NULL;
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+ /* No node for host bridge ? give up */
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+ if (ppnode == NULL)
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+ return -EINVAL;
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+ } else
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+ /* We found a P2P bridge, check if it has a node */
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+ ppnode = pci_device_to_OF_node(ppdev);
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+
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+ /* Ok, we have found a parent with a device-node, hand over to
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+ * the OF parsing code.
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+ * We build a unit address from the linux device to be used for
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+ * resolution. Note that we use the linux bus number which may
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+ * not match your firmware bus numbering.
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+ * Fortunately, in most cases, interrupt-map-mask doesn't
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+ * include the bus number as part of the matching.
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+ * You should still be careful about that though if you intend
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+ * to rely on this function (you ship a firmware that doesn't
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+ * create device nodes for all PCI devices).
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+ */
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+ if (ppnode)
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+ break;
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+
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+ /* We can only get here if we hit a P2P bridge with no node,
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+ * let's do standard swizzling and try again
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+ */
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+ lspec = of_irq_pci_swizzle(PCI_SLOT(pdev->devfn), lspec);
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+ pdev = ppdev;
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+ }
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+
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+ laddr[0] = (pdev->bus->number << 16)
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+ | (pdev->devfn << 8);
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+ laddr[1] = laddr[2] = 0;
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+ return of_irq_map_raw(ppnode, &lspec, 1, laddr, out_irq);
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+}
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+EXPORT_SYMBOL_GPL(of_irq_map_pci);
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+#endif /* CONFIG_PCI */
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+
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+/*
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+ * ISA bus specific translator
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+ */
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+
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+static int of_bus_isa_match(struct device_node *np)
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+{
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+ return !strcmp(np->name, "isa");
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+}
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+
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+static void of_bus_isa_count_cells(struct device_node *child,
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+ int *addrc, int *sizec)
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+{
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+ if (addrc)
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+ *addrc = 2;
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+ if (sizec)
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+ *sizec = 1;
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+}
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+
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+static u64 of_bus_isa_map(u32 *addr, const u32 *range, int na, int ns, int pna)
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+{
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+ u64 cp, s, da;
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+
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+ /* Check address type match */
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+ if ((addr[0] ^ range[0]) & 0x00000001)
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+ return OF_BAD_ADDR;
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+
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+ /* Read address values, skipping high cell */
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+ cp = of_read_number(range + 1, na - 1);
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+ s = of_read_number(range + na + pna, ns);
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+ da = of_read_number(addr + 1, na - 1);
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+
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+ pr_debug("OF: ISA map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da);
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+
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+ if (da < cp || da >= (cp + s))
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+ return OF_BAD_ADDR;
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+ return da - cp;
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+}
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+
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+static int of_bus_isa_translate(u32 *addr, u64 offset, int na)
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+{
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+ return of_bus_default_translate(addr + 1, offset, na - 1);
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+}
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+
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+static unsigned int of_bus_isa_get_flags(const u32 *addr)
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+{
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+ unsigned int flags = 0;
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+ u32 w = addr[0];
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+
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+ if (w & 1)
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+ flags |= IORESOURCE_IO;
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+ else
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+ flags |= IORESOURCE_MEM;
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+ return flags;
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+}
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+
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+/*
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+ * Array of bus specific translators
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+ */
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+
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+static struct of_bus of_busses[] = {
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+#ifdef CONFIG_PCI
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+ /* PCI */
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+ {
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+ .name = "pci",
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+ .addresses = "assigned-addresses",
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+ .match = of_bus_pci_match,
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+ .count_cells = of_bus_pci_count_cells,
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+ .map = of_bus_pci_map,
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+ .translate = of_bus_pci_translate,
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+ .get_flags = of_bus_pci_get_flags,
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+ },
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+#endif /* CONFIG_PCI */
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+ /* ISA */
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+ {
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+ .name = "isa",
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+ .addresses = "reg",
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+ .match = of_bus_isa_match,
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+ .count_cells = of_bus_isa_count_cells,
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+ .map = of_bus_isa_map,
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+ .translate = of_bus_isa_translate,
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+ .get_flags = of_bus_isa_get_flags,
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+ },
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+ /* Default */
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+ {
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+ .name = "default",
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+ .addresses = "reg",
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+ .match = NULL,
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+ .count_cells = of_bus_default_count_cells,
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+ .map = of_bus_default_map,
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+ .translate = of_bus_default_translate,
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+ .get_flags = of_bus_default_get_flags,
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+ },
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+};
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+
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+static struct of_bus *of_match_bus(struct device_node *np)
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+{
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+ int i;
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+
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+ for (i = 0; i < ARRAY_SIZE(of_busses); i++)
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+ if (!of_busses[i].match || of_busses[i].match(np))
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+ return &of_busses[i];
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+ BUG();
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+ return NULL;
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+}
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+
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+static int of_translate_one(struct device_node *parent, struct of_bus *bus,
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+ struct of_bus *pbus, u32 *addr,
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+ int na, int ns, int pna)
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+{
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+ const u32 *ranges;
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+ unsigned int rlen;
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+ int rone;
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+ u64 offset = OF_BAD_ADDR;
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+
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+ /* Normally, an absence of a "ranges" property means we are
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+ * crossing a non-translatable boundary, and thus the addresses
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+ * below the current not cannot be converted to CPU physical ones.
|
|
|
+ * Unfortunately, while this is very clear in the spec, it's not
|
|
|
+ * what Apple understood, and they do have things like /uni-n or
|
|
|
+ * /ht nodes with no "ranges" property and a lot of perfectly
|
|
|
+ * useable mapped devices below them. Thus we treat the absence of
|
|
|
+ * "ranges" as equivalent to an empty "ranges" property which means
|
|
|
+ * a 1:1 translation at that level. It's up to the caller not to try
|
|
|
+ * to translate addresses that aren't supposed to be translated in
|
|
|
+ * the first place. --BenH.
|
|
|
+ */
|
|
|
+ ranges = of_get_property(parent, "ranges", (int *) &rlen);
|
|
|
+ if (ranges == NULL || rlen == 0) {
|
|
|
+ offset = of_read_number(addr, na);
|
|
|
+ memset(addr, 0, pna * 4);
|
|
|
+ pr_debug("OF: no ranges, 1:1 translation\n");
|
|
|
+ goto finish;
|
|
|
+ }
|
|
|
+
|
|
|
+ pr_debug("OF: walking ranges...\n");
|
|
|
+
|
|
|
+ /* Now walk through the ranges */
|
|
|
+ rlen /= 4;
|
|
|
+ rone = na + pna + ns;
|
|
|
+ for (; rlen >= rone; rlen -= rone, ranges += rone) {
|
|
|
+ offset = bus->map(addr, ranges, na, ns, pna);
|
|
|
+ if (offset != OF_BAD_ADDR)
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ if (offset == OF_BAD_ADDR) {
|
|
|
+ pr_debug("OF: not found !\n");
|
|
|
+ return 1;
|
|
|
+ }
|
|
|
+ memcpy(addr, ranges + na, 4 * pna);
|
|
|
+
|
|
|
+ finish:
|
|
|
+ of_dump_addr("OF: parent translation for:", addr, pna);
|
|
|
+ pr_debug("OF: with offset: "PRu64"\n", offset);
|
|
|
+
|
|
|
+ /* Translate it into parent bus space */
|
|
|
+ return pbus->translate(addr, offset, pna);
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * Translate an address from the device-tree into a CPU physical address,
|
|
|
+ * this walks up the tree and applies the various bus mappings on the
|
|
|
+ * way.
|
|
|
+ *
|
|
|
+ * Note: We consider that crossing any level with #size-cells == 0 to mean
|
|
|
+ * that translation is impossible (that is we are not dealing with a value
|
|
|
+ * that can be mapped to a cpu physical address). This is not really specified
|
|
|
+ * that way, but this is traditionally the way IBM at least do things
|
|
|
+ */
|
|
|
+u64 of_translate_address(struct device_node *dev, const u32 *in_addr)
|
|
|
+{
|
|
|
+ struct device_node *parent = NULL;
|
|
|
+ struct of_bus *bus, *pbus;
|
|
|
+ u32 addr[OF_MAX_ADDR_CELLS];
|
|
|
+ int na, ns, pna, pns;
|
|
|
+ u64 result = OF_BAD_ADDR;
|
|
|
+
|
|
|
+ pr_debug("OF: ** translation for device %s **\n", dev->full_name);
|
|
|
+
|
|
|
+ /* Increase refcount at current level */
|
|
|
+ of_node_get(dev);
|
|
|
+
|
|
|
+ /* Get parent & match bus type */
|
|
|
+ parent = of_get_parent(dev);
|
|
|
+ if (parent == NULL)
|
|
|
+ goto bail;
|
|
|
+ bus = of_match_bus(parent);
|
|
|
+
|
|
|
+ /* Cound address cells & copy address locally */
|
|
|
+ bus->count_cells(dev, &na, &ns);
|
|
|
+ if (!OF_CHECK_COUNTS(na, ns)) {
|
|
|
+ printk(KERN_ERR "prom_parse: Bad cell count for %s\n",
|
|
|
+ dev->full_name);
|
|
|
+ goto bail;
|
|
|
+ }
|
|
|
+ memcpy(addr, in_addr, na * 4);
|
|
|
+
|
|
|
+ pr_debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
|
|
|
+ bus->name, na, ns, parent->full_name);
|
|
|
+ of_dump_addr("OF: translating address:", addr, na);
|
|
|
+
|
|
|
+ /* Translate */
|
|
|
+ for (;;) {
|
|
|
+ /* Switch to parent bus */
|
|
|
+ of_node_put(dev);
|
|
|
+ dev = parent;
|
|
|
+ parent = of_get_parent(dev);
|
|
|
+
|
|
|
+ /* If root, we have finished */
|
|
|
+ if (parent == NULL) {
|
|
|
+ pr_debug("OF: reached root node\n");
|
|
|
+ result = of_read_number(addr, na);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Get new parent bus and counts */
|
|
|
+ pbus = of_match_bus(parent);
|
|
|
+ pbus->count_cells(dev, &pna, &pns);
|
|
|
+ if (!OF_CHECK_COUNTS(pna, pns)) {
|
|
|
+ printk(KERN_ERR "prom_parse: Bad cell count for %s\n",
|
|
|
+ dev->full_name);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ pr_debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
|
|
|
+ pbus->name, pna, pns, parent->full_name);
|
|
|
+
|
|
|
+ /* Apply bus translation */
|
|
|
+ if (of_translate_one(dev, bus, pbus, addr, na, ns, pna))
|
|
|
+ break;
|
|
|
+
|
|
|
+ /* Complete the move up one level */
|
|
|
+ na = pna;
|
|
|
+ ns = pns;
|
|
|
+ bus = pbus;
|
|
|
+
|
|
|
+ of_dump_addr("OF: one level translation:", addr, na);
|
|
|
+ }
|
|
|
+ bail:
|
|
|
+ of_node_put(parent);
|
|
|
+ of_node_put(dev);
|
|
|
+
|
|
|
+ return result;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(of_translate_address);
|
|
|
+
|
|
|
+const u32 *of_get_address(struct device_node *dev, int index, u64 *size,
|
|
|
+ unsigned int *flags)
|
|
|
+{
|
|
|
+ const u32 *prop;
|
|
|
+ unsigned int psize;
|
|
|
+ struct device_node *parent;
|
|
|
+ struct of_bus *bus;
|
|
|
+ int onesize, i, na, ns;
|
|
|
+
|
|
|
+ /* Get parent & match bus type */
|
|
|
+ parent = of_get_parent(dev);
|
|
|
+ if (parent == NULL)
|
|
|
+ return NULL;
|
|
|
+ bus = of_match_bus(parent);
|
|
|
+ bus->count_cells(dev, &na, &ns);
|
|
|
+ of_node_put(parent);
|
|
|
+ if (!OF_CHECK_COUNTS(na, ns))
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ /* Get "reg" or "assigned-addresses" property */
|
|
|
+ prop = of_get_property(dev, bus->addresses, (int *) &psize);
|
|
|
+ if (prop == NULL)
|
|
|
+ return NULL;
|
|
|
+ psize /= 4;
|
|
|
+
|
|
|
+ onesize = na + ns;
|
|
|
+ for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++)
|
|
|
+ if (i == index) {
|
|
|
+ if (size)
|
|
|
+ *size = of_read_number(prop + na, ns);
|
|
|
+ if (flags)
|
|
|
+ *flags = bus->get_flags(prop);
|
|
|
+ return prop;
|
|
|
+ }
|
|
|
+ return NULL;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(of_get_address);
|
|
|
+
|
|
|
+static int __of_address_to_resource(struct device_node *dev, const u32 *addrp,
|
|
|
+ u64 size, unsigned int flags,
|
|
|
+ struct resource *r)
|
|
|
+{
|
|
|
+ u64 taddr;
|
|
|
+
|
|
|
+ if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0)
|
|
|
+ return -EINVAL;
|
|
|
+ taddr = of_translate_address(dev, addrp);
|
|
|
+ if (taddr == OF_BAD_ADDR)
|
|
|
+ return -EINVAL;
|
|
|
+ memset(r, 0, sizeof(struct resource));
|
|
|
+ if (flags & IORESOURCE_IO) {
|
|
|
+ unsigned long port;
|
|
|
+ port = -1; /* pci_address_to_pio(taddr); */
|
|
|
+ if (port == (unsigned long)-1)
|
|
|
+ return -EINVAL;
|
|
|
+ r->start = port;
|
|
|
+ r->end = port + size - 1;
|
|
|
+ } else {
|
|
|
+ r->start = taddr;
|
|
|
+ r->end = taddr + size - 1;
|
|
|
+ }
|
|
|
+ r->flags = flags;
|
|
|
+ r->name = dev->name;
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+int of_address_to_resource(struct device_node *dev, int index,
|
|
|
+ struct resource *r)
|
|
|
+{
|
|
|
+ const u32 *addrp;
|
|
|
+ u64 size;
|
|
|
+ unsigned int flags;
|
|
|
+
|
|
|
+ addrp = of_get_address(dev, index, &size, &flags);
|
|
|
+ if (addrp == NULL)
|
|
|
+ return -EINVAL;
|
|
|
+ return __of_address_to_resource(dev, addrp, size, flags, r);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL_GPL(of_address_to_resource);
|
|
|
+
|
|
|
+void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
|
|
|
+ unsigned long *busno, unsigned long *phys, unsigned long *size)
|
|
|
+{
|
|
|
+ const u32 *dma_window;
|
|
|
+ u32 cells;
|
|
|
+ const unsigned char *prop;
|
|
|
+
|
|
|
+ dma_window = dma_window_prop;
|
|
|
+
|
|
|
+ /* busno is always one cell */
|
|
|
+ *busno = *(dma_window++);
|
|
|
+
|
|
|
+ prop = of_get_property(dn, "ibm,#dma-address-cells", NULL);
|
|
|
+ if (!prop)
|
|
|
+ prop = of_get_property(dn, "#address-cells", NULL);
|
|
|
+
|
|
|
+ cells = prop ? *(u32 *)prop : of_n_addr_cells(dn);
|
|
|
+ *phys = of_read_number(dma_window, cells);
|
|
|
+
|
|
|
+ dma_window += cells;
|
|
|
+
|
|
|
+ prop = of_get_property(dn, "ibm,#dma-size-cells", NULL);
|
|
|
+ cells = prop ? *(u32 *)prop : of_n_size_cells(dn);
|
|
|
+ *size = of_read_number(dma_window, cells);
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * Interrupt remapper
|
|
|
+ */
|
|
|
+
|
|
|
+static unsigned int of_irq_workarounds;
|
|
|
+static struct device_node *of_irq_dflt_pic;
|
|
|
+
|
|
|
+static struct device_node *of_irq_find_parent(struct device_node *child)
|
|
|
+{
|
|
|
+ struct device_node *p;
|
|
|
+ const phandle *parp;
|
|
|
+
|
|
|
+ if (!of_node_get(child))
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ do {
|
|
|
+ parp = of_get_property(child, "interrupt-parent", NULL);
|
|
|
+ if (parp == NULL)
|
|
|
+ p = of_get_parent(child);
|
|
|
+ else {
|
|
|
+ if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
|
|
|
+ p = of_node_get(of_irq_dflt_pic);
|
|
|
+ else
|
|
|
+ p = of_find_node_by_phandle(*parp);
|
|
|
+ }
|
|
|
+ of_node_put(child);
|
|
|
+ child = p;
|
|
|
+ } while (p && of_get_property(p, "#interrupt-cells", NULL) == NULL);
|
|
|
+
|
|
|
+ return p;
|
|
|
+}
|
|
|
+
|
|
|
+/* This doesn't need to be called if you don't have any special workaround
|
|
|
+ * flags to pass
|
|
|
+ */
|
|
|
+void of_irq_map_init(unsigned int flags)
|
|
|
+{
|
|
|
+ of_irq_workarounds = flags;
|
|
|
+
|
|
|
+ /* OldWorld, don't bother looking at other things */
|
|
|
+ if (flags & OF_IMAP_OLDWORLD_MAC)
|
|
|
+ return;
|
|
|
+
|
|
|
+ /* If we don't have phandles, let's try to locate a default interrupt
|
|
|
+ * controller (happens when booting with BootX). We do a first match
|
|
|
+ * here, hopefully, that only ever happens on machines with one
|
|
|
+ * controller.
|
|
|
+ */
|
|
|
+ if (flags & OF_IMAP_NO_PHANDLE) {
|
|
|
+ struct device_node *np;
|
|
|
+
|
|
|
+ for (np = NULL; (np = of_find_all_nodes(np)) != NULL;) {
|
|
|
+ if (of_get_property(np, "interrupt-controller", NULL)
|
|
|
+ == NULL)
|
|
|
+ continue;
|
|
|
+ /* Skip /chosen/interrupt-controller */
|
|
|
+ if (strcmp(np->name, "chosen") == 0)
|
|
|
+ continue;
|
|
|
+ /* It seems like at least one person on this planet
|
|
|
+ * wants to use BootX on a machine with an AppleKiwi
|
|
|
+ * controller which happens to pretend to be an
|
|
|
+ * interrupt controller too.
|
|
|
+ */
|
|
|
+ if (strcmp(np->name, "AppleKiwi") == 0)
|
|
|
+ continue;
|
|
|
+ /* I think we found one ! */
|
|
|
+ of_irq_dflt_pic = np;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+}
|
|
|
+
|
|
|
+int of_irq_map_raw(struct device_node *parent, const u32 *intspec, u32 ointsize,
|
|
|
+ const u32 *addr, struct of_irq *out_irq)
|
|
|
+{
|
|
|
+ struct device_node *ipar, *tnode, *old = NULL, *newpar = NULL;
|
|
|
+ const u32 *tmp, *imap, *imask;
|
|
|
+ u32 intsize = 1, addrsize, newintsize = 0, newaddrsize = 0;
|
|
|
+ int imaplen, match, i;
|
|
|
+
|
|
|
+ pr_debug("of_irq_map_raw: par=%s,intspec=[0x%08x 0x%08x...],"
|
|
|
+ "ointsize=%d\n",
|
|
|
+ parent->full_name, intspec[0], intspec[1], ointsize);
|
|
|
+
|
|
|
+ ipar = of_node_get(parent);
|
|
|
+
|
|
|
+ /* First get the #interrupt-cells property of the current cursor
|
|
|
+ * that tells us how to interpret the passed-in intspec. If there
|
|
|
+ * is none, we are nice and just walk up the tree
|
|
|
+ */
|
|
|
+ do {
|
|
|
+ tmp = of_get_property(ipar, "#interrupt-cells", NULL);
|
|
|
+ if (tmp != NULL) {
|
|
|
+ intsize = *tmp;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ tnode = ipar;
|
|
|
+ ipar = of_irq_find_parent(ipar);
|
|
|
+ of_node_put(tnode);
|
|
|
+ } while (ipar);
|
|
|
+ if (ipar == NULL) {
|
|
|
+ pr_debug(" -> no parent found !\n");
|
|
|
+ goto fail;
|
|
|
+ }
|
|
|
+
|
|
|
+ pr_debug("of_irq_map_raw: ipar=%s, size=%d\n",
|
|
|
+ ipar->full_name, intsize);
|
|
|
+
|
|
|
+ if (ointsize != intsize)
|
|
|
+ return -EINVAL;
|
|
|
+
|
|
|
+ /* Look for this #address-cells. We have to implement the old linux
|
|
|
+ * trick of looking for the parent here as some device-trees rely on it
|
|
|
+ */
|
|
|
+ old = of_node_get(ipar);
|
|
|
+ do {
|
|
|
+ tmp = of_get_property(old, "#address-cells", NULL);
|
|
|
+ tnode = of_get_parent(old);
|
|
|
+ of_node_put(old);
|
|
|
+ old = tnode;
|
|
|
+ } while (old && tmp == NULL);
|
|
|
+ of_node_put(old);
|
|
|
+ old = NULL;
|
|
|
+ addrsize = (tmp == NULL) ? 2 : *tmp;
|
|
|
+
|
|
|
+ pr_debug(" -> addrsize=%d\n", addrsize);
|
|
|
+
|
|
|
+ /* Now start the actual "proper" walk of the interrupt tree */
|
|
|
+ while (ipar != NULL) {
|
|
|
+ /* Now check if cursor is an interrupt-controller and if it is
|
|
|
+ * then we are done
|
|
|
+ */
|
|
|
+ if (of_get_property(ipar, "interrupt-controller", NULL) !=
|
|
|
+ NULL) {
|
|
|
+ pr_debug(" -> got it !\n");
|
|
|
+ memcpy(out_irq->specifier, intspec,
|
|
|
+ intsize * sizeof(u32));
|
|
|
+ out_irq->size = intsize;
|
|
|
+ out_irq->controller = ipar;
|
|
|
+ of_node_put(old);
|
|
|
+ return 0;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Now look for an interrupt-map */
|
|
|
+ imap = of_get_property(ipar, "interrupt-map", &imaplen);
|
|
|
+ /* No interrupt map, check for an interrupt parent */
|
|
|
+ if (imap == NULL) {
|
|
|
+ pr_debug(" -> no map, getting parent\n");
|
|
|
+ newpar = of_irq_find_parent(ipar);
|
|
|
+ goto skiplevel;
|
|
|
+ }
|
|
|
+ imaplen /= sizeof(u32);
|
|
|
+
|
|
|
+ /* Look for a mask */
|
|
|
+ imask = of_get_property(ipar, "interrupt-map-mask", NULL);
|
|
|
+
|
|
|
+ /* If we were passed no "reg" property and we attempt to parse
|
|
|
+ * an interrupt-map, then #address-cells must be 0.
|
|
|
+ * Fail if it's not.
|
|
|
+ */
|
|
|
+ if (addr == NULL && addrsize != 0) {
|
|
|
+ pr_debug(" -> no reg passed in when needed !\n");
|
|
|
+ goto fail;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Parse interrupt-map */
|
|
|
+ match = 0;
|
|
|
+ while (imaplen > (addrsize + intsize + 1) && !match) {
|
|
|
+ /* Compare specifiers */
|
|
|
+ match = 1;
|
|
|
+ for (i = 0; i < addrsize && match; ++i) {
|
|
|
+ u32 mask = imask ? imask[i] : 0xffffffffu;
|
|
|
+ match = ((addr[i] ^ imap[i]) & mask) == 0;
|
|
|
+ }
|
|
|
+ for (; i < (addrsize + intsize) && match; ++i) {
|
|
|
+ u32 mask = imask ? imask[i] : 0xffffffffu;
|
|
|
+ match =
|
|
|
+ ((intspec[i-addrsize] ^ imap[i])
|
|
|
+ & mask) == 0;
|
|
|
+ }
|
|
|
+ imap += addrsize + intsize;
|
|
|
+ imaplen -= addrsize + intsize;
|
|
|
+
|
|
|
+ pr_debug(" -> match=%d (imaplen=%d)\n", match, imaplen);
|
|
|
+
|
|
|
+ /* Get the interrupt parent */
|
|
|
+ if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
|
|
|
+ newpar = of_node_get(of_irq_dflt_pic);
|
|
|
+ else
|
|
|
+ newpar =
|
|
|
+ of_find_node_by_phandle((phandle)*imap);
|
|
|
+ imap++;
|
|
|
+ --imaplen;
|
|
|
+
|
|
|
+ /* Check if not found */
|
|
|
+ if (newpar == NULL) {
|
|
|
+ pr_debug(" -> imap parent not found !\n");
|
|
|
+ goto fail;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Get #interrupt-cells and #address-cells of new
|
|
|
+ * parent
|
|
|
+ */
|
|
|
+ tmp = of_get_property(newpar, "#interrupt-cells", NULL);
|
|
|
+ if (tmp == NULL) {
|
|
|
+ pr_debug(" -> parent lacks "
|
|
|
+ "#interrupt-cells!\n");
|
|
|
+ goto fail;
|
|
|
+ }
|
|
|
+ newintsize = *tmp;
|
|
|
+ tmp = of_get_property(newpar, "#address-cells", NULL);
|
|
|
+ newaddrsize = (tmp == NULL) ? 0 : *tmp;
|
|
|
+
|
|
|
+ pr_debug(" -> newintsize=%d, newaddrsize=%d\n",
|
|
|
+ newintsize, newaddrsize);
|
|
|
+
|
|
|
+ /* Check for malformed properties */
|
|
|
+ if (imaplen < (newaddrsize + newintsize))
|
|
|
+ goto fail;
|
|
|
+
|
|
|
+ imap += newaddrsize + newintsize;
|
|
|
+ imaplen -= newaddrsize + newintsize;
|
|
|
+
|
|
|
+ pr_debug(" -> imaplen=%d\n", imaplen);
|
|
|
+ }
|
|
|
+ if (!match)
|
|
|
+ goto fail;
|
|
|
+
|
|
|
+ of_node_put(old);
|
|
|
+ old = of_node_get(newpar);
|
|
|
+ addrsize = newaddrsize;
|
|
|
+ intsize = newintsize;
|
|
|
+ intspec = imap - intsize;
|
|
|
+ addr = intspec - addrsize;
|
|
|
+
|
|
|
+skiplevel:
|
|
|
+ /* Iterate again with new parent */
|
|
|
+ pr_debug(" -> new parent: %s\n",
|
|
|
+ newpar ? newpar->full_name : "<>");
|
|
|
+ of_node_put(ipar);
|
|
|
+ ipar = newpar;
|
|
|
+ newpar = NULL;
|
|
|
+ }
|
|
|
+fail:
|
|
|
+ of_node_put(ipar);
|
|
|
+ of_node_put(old);
|
|
|
+ of_node_put(newpar);
|
|
|
+
|
|
|
+ return -EINVAL;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL_GPL(of_irq_map_raw);
|
|
|
+
|
|
|
+int of_irq_map_one(struct device_node *device,
|
|
|
+ int index, struct of_irq *out_irq)
|
|
|
+{
|
|
|
+ struct device_node *p;
|
|
|
+ const u32 *intspec, *tmp, *addr;
|
|
|
+ u32 intsize, intlen;
|
|
|
+ int res;
|
|
|
+
|
|
|
+ pr_debug("of_irq_map_one: dev=%s, index=%d\n",
|
|
|
+ device->full_name, index);
|
|
|
+
|
|
|
+ /* Get the interrupts property */
|
|
|
+ intspec = of_get_property(device, "interrupts", (int *) &intlen);
|
|
|
+ if (intspec == NULL)
|
|
|
+ return -EINVAL;
|
|
|
+ intlen /= sizeof(u32);
|
|
|
+
|
|
|
+ pr_debug(" intspec=%d intlen=%d\n", *intspec, intlen);
|
|
|
+
|
|
|
+ /* Get the reg property (if any) */
|
|
|
+ addr = of_get_property(device, "reg", NULL);
|
|
|
+
|
|
|
+ /* Look for the interrupt parent. */
|
|
|
+ p = of_irq_find_parent(device);
|
|
|
+ if (p == NULL)
|
|
|
+ return -EINVAL;
|
|
|
+
|
|
|
+ /* Get size of interrupt specifier */
|
|
|
+ tmp = of_get_property(p, "#interrupt-cells", NULL);
|
|
|
+ if (tmp == NULL) {
|
|
|
+ of_node_put(p);
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+ intsize = *tmp;
|
|
|
+
|
|
|
+ pr_debug(" intsize=%d intlen=%d\n", intsize, intlen);
|
|
|
+
|
|
|
+ /* Check index */
|
|
|
+ if ((index + 1) * intsize > intlen)
|
|
|
+ return -EINVAL;
|
|
|
+
|
|
|
+ /* Get new specifier and map it */
|
|
|
+ res = of_irq_map_raw(p, intspec + index * intsize, intsize,
|
|
|
+ addr, out_irq);
|
|
|
+ of_node_put(p);
|
|
|
+ return res;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL_GPL(of_irq_map_one);
|
|
|
+
|
|
|
+/**
|
|
|
+ * Search the device tree for the best MAC address to use. 'mac-address' is
|
|
|
+ * checked first, because that is supposed to contain to "most recent" MAC
|
|
|
+ * address. If that isn't set, then 'local-mac-address' is checked next,
|
|
|
+ * because that is the default address. If that isn't set, then the obsolete
|
|
|
+ * 'address' is checked, just in case we're using an old device tree.
|
|
|
+ *
|
|
|
+ * Note that the 'address' property is supposed to contain a virtual address of
|
|
|
+ * the register set, but some DTS files have redefined that property to be the
|
|
|
+ * MAC address.
|
|
|
+ *
|
|
|
+ * All-zero MAC addresses are rejected, because those could be properties that
|
|
|
+ * exist in the device tree, but were not set by U-Boot. For example, the
|
|
|
+ * DTS could define 'mac-address' and 'local-mac-address', with zero MAC
|
|
|
+ * addresses. Some older U-Boots only initialized 'local-mac-address'. In
|
|
|
+ * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists
|
|
|
+ * but is all zeros.
|
|
|
+*/
|
|
|
+const void *of_get_mac_address(struct device_node *np)
|
|
|
+{
|
|
|
+ struct property *pp;
|
|
|
+
|
|
|
+ pp = of_find_property(np, "mac-address", NULL);
|
|
|
+ if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
|
|
|
+ return pp->value;
|
|
|
+
|
|
|
+ pp = of_find_property(np, "local-mac-address", NULL);
|
|
|
+ if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
|
|
|
+ return pp->value;
|
|
|
+
|
|
|
+ pp = of_find_property(np, "address", NULL);
|
|
|
+ if (pp && (pp->length == 6) && is_valid_ether_addr(pp->value))
|
|
|
+ return pp->value;
|
|
|
+
|
|
|
+ return NULL;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(of_get_mac_address);
|
|
|
+
|
|
|
+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;
|
|
|
+}
|
|
|
+EXPORT_SYMBOL_GPL(of_irq_to_resource);
|
|
|
+
|
|
|
+void __iomem *of_iomap(struct device_node *np, int index)
|
|
|
+{
|
|
|
+ struct resource res;
|
|
|
+
|
|
|
+ if (of_address_to_resource(np, index, &res))
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ return ioremap(res.start, 1 + res.end - res.start);
|
|
|
+}
|
|
|
+EXPORT_SYMBOL(of_iomap);
|
Michal Simek