return error;
}
+static int node_match(struct device *dev, void *data)
+{
+ struct of_device *op = to_of_device(dev);
+ struct device_node *dp = data;
+
+ return (op->node == dp);
+}
+
+struct of_device *of_find_device_by_node(struct device_node *dp)
+{
+ struct device *dev = bus_find_device(&of_bus_type, NULL,
+ dp, node_match);
+
+ if (dev)
+ return to_of_device(dev);
+
+ return NULL;
+}
+EXPORT_SYMBOL(of_find_device_by_node);
+
#ifdef CONFIG_PCI
struct bus_type ebus_bus_type = {
.name = "ebus",
EXPORT_SYMBOL(sbus_bus_type);
#endif
+struct bus_type of_bus_type = {
+ .name = "of",
+ .match = of_platform_bus_match,
+ .probe = of_device_probe,
+ .remove = of_device_remove,
+ .suspend = of_device_suspend,
+ .resume = of_device_resume,
+};
+EXPORT_SYMBOL(of_bus_type);
+
+static inline u64 of_read_addr(u32 *cell, int size)
+{
+ u64 r = 0;
+ while (size--)
+ r = (r << 32) | *(cell++);
+ return r;
+}
+
+static void __init get_cells(struct device_node *dp,
+ int *addrc, int *sizec)
+{
+ if (addrc)
+ *addrc = of_n_addr_cells(dp);
+ if (sizec)
+ *sizec = of_n_size_cells(dp);
+}
+
+/* Max address size we deal with */
+#define OF_MAX_ADDR_CELLS 4
+
+struct of_bus {
+ const char *name;
+ const char *addr_prop_name;
+ int (*match)(struct device_node *parent);
+ void (*count_cells)(struct device_node *child,
+ int *addrc, int *sizec);
+ u64 (*map)(u32 *addr, u32 *range, int na, int ns, int pna);
+ int (*translate)(u32 *addr, u64 offset, int na);
+ unsigned int (*get_flags)(u32 *addr);
+};
+
+/*
+ * Default translator (generic bus)
+ */
+
+static void of_bus_default_count_cells(struct device_node *dev,
+ int *addrc, int *sizec)
+{
+ get_cells(dev, addrc, sizec);
+}
+
+static u64 of_bus_default_map(u32 *addr, u32 *range, int na, int ns, int pna)
+{
+ u64 cp, s, da;
+
+ cp = of_read_addr(range, na);
+ s = of_read_addr(range + na + pna, ns);
+ da = of_read_addr(addr, na);
+
+ if (da < cp || da >= (cp + s))
+ return OF_BAD_ADDR;
+ return da - cp;
+}
+
+static int of_bus_default_translate(u32 *addr, u64 offset, int na)
+{
+ u64 a = of_read_addr(addr, na);
+ memset(addr, 0, na * 4);
+ a += offset;
+ if (na > 1)
+ addr[na - 2] = a >> 32;
+ addr[na - 1] = a & 0xffffffffu;
+
+ return 0;
+}
+
+static unsigned int of_bus_default_get_flags(u32 *addr)
+{
+ return IORESOURCE_MEM;
+}
+
+
+/*
+ * PCI bus specific translator
+ */
+
+static int of_bus_pci_match(struct device_node *np)
+{
+ return !strcmp(np->type, "pci") || !strcmp(np->type, "pciex");
+}
+
+static void of_bus_pci_count_cells(struct device_node *np,
+ int *addrc, int *sizec)
+{
+ if (addrc)
+ *addrc = 3;
+ if (sizec)
+ *sizec = 2;
+}
+
+static u64 of_bus_pci_map(u32 *addr, u32 *range, int na, int ns, int pna)
+{
+ u64 cp, s, da;
+
+ /* Check address type match */
+ if ((addr[0] ^ range[0]) & 0x03000000)
+ return OF_BAD_ADDR;
+
+ /* Read address values, skipping high cell */
+ cp = of_read_addr(range + 1, na - 1);
+ s = of_read_addr(range + na + pna, ns);
+ da = of_read_addr(addr + 1, na - 1);
+
+ if (da < cp || da >= (cp + s))
+ return OF_BAD_ADDR;
+ return da - cp;
+}
+
+static int of_bus_pci_translate(u32 *addr, u64 offset, int na)
+{
+ return of_bus_default_translate(addr + 1, offset, na - 1);
+}
+
+static unsigned int of_bus_pci_get_flags(u32 *addr)
+{
+ unsigned int flags = 0;
+ u32 w = addr[0];
+
+ switch((w >> 24) & 0x03) {
+ case 0x01:
+ flags |= IORESOURCE_IO;
+ case 0x02: /* 32 bits */
+ case 0x03: /* 64 bits */
+ flags |= IORESOURCE_MEM;
+ }
+ if (w & 0x40000000)
+ flags |= IORESOURCE_PREFETCH;
+ return flags;
+}
+
+/*
+ * SBUS bus specific translator
+ */
+
+static int of_bus_sbus_match(struct device_node *np)
+{
+ return !strcmp(np->name, "sbus") ||
+ !strcmp(np->name, "sbi");
+}
+
+static void of_bus_sbus_count_cells(struct device_node *child,
+ int *addrc, int *sizec)
+{
+ if (addrc)
+ *addrc = 2;
+ if (sizec)
+ *sizec = 1;
+}
+
+static u64 of_bus_sbus_map(u32 *addr, u32 *range, int na, int ns, int pna)
+{
+ return of_bus_default_map(addr, range, na, ns, pna);
+}
+
+static int of_bus_sbus_translate(u32 *addr, u64 offset, int na)
+{
+ return of_bus_default_translate(addr, offset, na);
+}
+
+static unsigned int of_bus_sbus_get_flags(u32 *addr)
+{
+ return IORESOURCE_MEM;
+}
+
+
+/*
+ * Array of bus specific translators
+ */
+
+static struct of_bus of_busses[] = {
+ /* PCI */
+ {
+ .name = "pci",
+ .addr_prop_name = "assigned-addresses",
+ .match = of_bus_pci_match,
+ .count_cells = of_bus_pci_count_cells,
+ .map = of_bus_pci_map,
+ .translate = of_bus_pci_translate,
+ .get_flags = of_bus_pci_get_flags,
+ },
+ /* SBUS */
+ {
+ .name = "sbus",
+ .addr_prop_name = "reg",
+ .match = of_bus_sbus_match,
+ .count_cells = of_bus_sbus_count_cells,
+ .map = of_bus_sbus_map,
+ .translate = of_bus_sbus_translate,
+ .get_flags = of_bus_sbus_get_flags,
+ },
+ /* Default */
+ {
+ .name = "default",
+ .addr_prop_name = "reg",
+ .match = NULL,
+ .count_cells = of_bus_default_count_cells,
+ .map = of_bus_default_map,
+ .translate = of_bus_default_translate,
+ .get_flags = of_bus_default_get_flags,
+ },
+};
+
+static struct of_bus *of_match_bus(struct device_node *np)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(of_busses); i ++)
+ if (!of_busses[i].match || of_busses[i].match(np))
+ return &of_busses[i];
+ BUG();
+ return NULL;
+}
+
+static int __init build_one_resource(struct device_node *parent,
+ struct of_bus *bus,
+ struct of_bus *pbus,
+ u32 *addr,
+ int na, int ns, int pna)
+{
+ u32 *ranges;
+ unsigned int rlen;
+ int rone;
+ u64 offset = OF_BAD_ADDR;
+
+ ranges = of_get_property(parent, "ranges", &rlen);
+ if (ranges == NULL || rlen == 0) {
+ offset = of_read_addr(addr, na);
+ memset(addr, 0, pna * 4);
+ goto finish;
+ }
+
+ /* 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)
+ return 1;
+
+ memcpy(addr, ranges + na, 4 * pna);
+
+finish:
+ /* Translate it into parent bus space */
+ return pbus->translate(addr, offset, pna);
+}
+
+static void __init build_device_resources(struct of_device *op,
+ struct device *parent)
+{
+ struct of_device *p_op;
+ struct of_bus *bus;
+ int na, ns;
+ int index, num_reg;
+ void *preg;
+
+ if (!parent)
+ return;
+
+ p_op = to_of_device(parent);
+ bus = of_match_bus(p_op->node);
+ bus->count_cells(op->node, &na, &ns);
+
+ preg = of_get_property(op->node, bus->addr_prop_name, &num_reg);
+ if (!preg || num_reg == 0)
+ return;
+
+ /* Convert to num-cells. */
+ num_reg /= 4;
+
+ /* Conver to num-entries. */
+ num_reg /= na + ns;
+
+ for (index = 0; index < num_reg; index++) {
+ struct resource *r = &op->resource[index];
+ u32 addr[OF_MAX_ADDR_CELLS];
+ u32 *reg = (preg + (index * ((na + ns) * 4)));
+ struct device_node *dp = op->node;
+ struct device_node *pp = p_op->node;
+ struct of_bus *pbus;
+ u64 size, result = OF_BAD_ADDR;
+ unsigned long flags;
+ int dna, dns;
+ int pna, pns;
+
+ size = of_read_addr(reg + na, ns);
+ flags = bus->get_flags(reg);
+
+ memcpy(addr, reg, na * 4);
+
+ /* If the immediate parent has no ranges property to apply,
+ * just use a 1<->1 mapping.
+ */
+ if (of_find_property(pp, "ranges", NULL) == NULL) {
+ result = of_read_addr(addr, na);
+ goto build_res;
+ }
+
+ dna = na;
+ dns = ns;
+
+ while (1) {
+ dp = pp;
+ pp = dp->parent;
+ if (!pp) {
+ result = of_read_addr(addr, dna);
+ break;
+ }
+
+ pbus = of_match_bus(pp);
+ pbus->count_cells(dp, &pna, &pns);
+
+ if (build_one_resource(dp, bus, pbus, addr, dna, dns, pna))
+ break;
+
+ dna = pna;
+ dns = pns;
+ bus = pbus;
+ }
+
+ build_res:
+ memset(r, 0, sizeof(*r));
+ if (result != OF_BAD_ADDR) {
+ r->start = result & 0xffffffff;
+ r->end = result + size - 1;
+ r->flags = flags | ((result >> 32ULL) & 0xffUL);
+ } else {
+ r->start = ~0UL;
+ r->end = ~0UL;
+ }
+ r->name = op->node->name;
+ }
+}
+
+static struct of_device * __init scan_one_device(struct device_node *dp,
+ struct device *parent)
+{
+ struct of_device *op = kzalloc(sizeof(*op), GFP_KERNEL);
+ struct linux_prom_irqs *intr;
+ int len, i;
+
+ if (!op)
+ return NULL;
+
+ op->node = dp;
+
+ op->clock_freq = of_getintprop_default(dp, "clock-frequency",
+ (25*1000*1000));
+ op->portid = of_getintprop_default(dp, "upa-portid", -1);
+ if (op->portid == -1)
+ op->portid = of_getintprop_default(dp, "portid", -1);
+
+ intr = of_get_property(dp, "intr", &len);
+ if (intr) {
+ op->num_irqs = len / sizeof(struct linux_prom_irqs);
+ for (i = 0; i < op->num_irqs; i++)
+ op->irqs[i] = intr[i].pri;
+ } else {
+ unsigned int *irq = of_get_property(dp, "interrupts", &len);
+
+ if (irq) {
+ op->num_irqs = len / sizeof(unsigned int);
+ for (i = 0; i < op->num_irqs; i++)
+ op->irqs[i] = irq[i];
+ } else {
+ op->num_irqs = 0;
+ }
+ }
+ if (sparc_cpu_model == sun4d) {
+ static int pil_to_sbus[] = {
+ 0, 0, 1, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 0,
+ };
+ struct device_node *busp = dp->parent;
+ struct linux_prom_registers *regs;
+ int board = of_getintprop_default(busp, "board#", 0);
+ int slot;
+
+ regs = of_get_property(dp, "reg", NULL);
+ slot = regs->which_io;
+
+ for (i = 0; i < op->num_irqs; i++) {
+ int this_irq = op->irqs[i];
+ int sbusl = pil_to_sbus[this_irq];
+
+ if (sbusl)
+ this_irq = (((board + 1) << 5) +
+ (sbusl << 2) +
+ slot);
+
+ op->irqs[i] = this_irq;
+ }
+ }
+
+ build_device_resources(op, parent);
+
+ op->dev.parent = parent;
+ op->dev.bus = &of_bus_type;
+ if (!parent)
+ strcpy(op->dev.bus_id, "root");
+ else
+ strcpy(op->dev.bus_id, dp->path_component_name);
+
+ if (of_device_register(op)) {
+ printk("%s: Could not register of device.\n",
+ dp->full_name);
+ kfree(op);
+ op = NULL;
+ }
+
+ return op;
+}
+
+static void __init scan_tree(struct device_node *dp, struct device *parent)
+{
+ while (dp) {
+ struct of_device *op = scan_one_device(dp, parent);
+
+ if (op)
+ scan_tree(dp->child, &op->dev);
+
+ dp = dp->sibling;
+ }
+}
+
+static void __init scan_of_devices(void)
+{
+ struct device_node *root = of_find_node_by_path("/");
+ struct of_device *parent;
+
+ parent = scan_one_device(root, NULL);
+ if (!parent)
+ return;
+
+ scan_tree(root->child, &parent->dev);
+}
+
static int __init of_bus_driver_init(void)
{
- int err = 0;
+ int err;
+ err = bus_register(&of_bus_type);
#ifdef CONFIG_PCI
if (!err)
err = bus_register(&ebus_bus_type);
if (!err)
err = bus_register(&sbus_bus_type);
#endif
- return 0;
+
+ if (!err)
+ scan_of_devices();
+
+ return err;
}
postcore_initcall(of_bus_driver_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff