[SPARC]: Beginnings of generic of_device framework.
David S. Miller [Thu, 29 Jun 2006 21:34:50 +0000 (14:34 -0700)]
The idea is to fully construct the device register and
interrupt values into these of_device objects, and convert
all of SBUS, EBUS, ISA drivers to use this new stuff.

Much ideas and code taken from Ben H.'s powerpc work.

Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/kernel/of_device.c
arch/sparc64/kernel/of_device.c
include/asm-sparc/of_device.h
include/asm-sparc/prom.h
include/asm-sparc64/of_device.h
include/asm-sparc64/prom.h

index 80a8094..13a70bd 100644 (file)
@@ -153,10 +153,424 @@ struct bus_type sbus_bus_type = {
 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;
+                       r->end = result + size - 1;
+                       r->flags = flags;
+               } 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);
+       unsigned int *irq;
+       int len;
+
+       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);
+
+       irq = of_get_property(dp, "interrupts", &len);
+       if (irq)
+               op->irq = *irq;
+       else
+               op->irq = 0xffffffff;
+
+       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);
@@ -165,7 +579,11 @@ static int __init of_bus_driver_init(void)
        if (!err)
                err = bus_register(&sbus_bus_type);
 #endif
-       return 0;
+
+       if (!err)
+               scan_of_devices();
+
+       return err;
 }
 
 postcore_initcall(of_bus_driver_init);
index 768475b..00502dc 100644 (file)
@@ -163,10 +163,492 @@ struct bus_type sbus_bus_type = {
 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;
+}
+
+/*
+ * ISA bus specific translator
+ */
+
+static int of_bus_isa_match(struct device_node *np)
+{
+       return !strcmp(np->name, "isa");
+}
+
+static void of_bus_isa_count_cells(struct device_node *child,
+                                  int *addrc, int *sizec)
+{
+       if (addrc)
+               *addrc = 2;
+       if (sizec)
+               *sizec = 1;
+}
+
+static u64 of_bus_isa_map(u32 *addr, u32 *range, int na, int ns, int pna)
+{
+       u64 cp, s, da;
+
+       /* Check address type match */
+       if ((addr[0] ^ range[0]) & 0x00000001)
+               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_isa_translate(u32 *addr, u64 offset, int na)
+{
+       return of_bus_default_translate(addr + 1, offset, na - 1);
+}
+
+static unsigned int of_bus_isa_get_flags(u32 *addr)
+{
+       unsigned int flags = 0;
+       u32 w = addr[0];
+
+       if (w & 1)
+               flags |= IORESOURCE_IO;
+       else
+               flags |= IORESOURCE_MEM;
+       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,
+       },
+       /* ISA */
+       {
+               .name = "isa",
+               .addr_prop_name = "reg",
+               .match = of_bus_isa_match,
+               .count_cells = of_bus_isa_count_cells,
+               .map = of_bus_isa_map,
+               .translate = of_bus_isa_translate,
+               .get_flags = of_bus_isa_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.  Unless it is the 'dma' child
+                * of an isa bus, which must be passed up towards the root.
+                *
+                * Also, don't try to translate PMU bus device registers.
+                */
+               if ((of_find_property(pp, "ranges", NULL) == NULL &&
+                    strcmp(pp->name, "dma") != 0) ||
+                   !strcmp(pp->name, "pmu")) {
+                       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;
+                       r->end = result + size - 1;
+                       r->flags = flags;
+               } 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);
+       unsigned int *irq;
+       int len;
+
+       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);
+
+       irq = of_get_property(dp, "interrupts", &len);
+       if (irq)
+               op->irq = *irq;
+       else
+               op->irq = 0xffffffff;
+
+       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(&isa_bus_type);
@@ -177,7 +659,11 @@ static int __init of_bus_driver_init(void)
        if (!err)
                err = bus_register(&sbus_bus_type);
 #endif
-       return 0;
+
+       if (!err)
+               scan_of_devices();
+
+       return err;
 }
 
 postcore_initcall(of_bus_driver_init);
index 4816d10..1b43ee5 100644 (file)
@@ -4,10 +4,12 @@
 
 #include <linux/device.h>
 #include <linux/mod_devicetable.h>
+#include <asm/openprom.h>
 #include <asm/prom.h>
 
 extern struct bus_type ebus_bus_type;
 extern struct bus_type sbus_bus_type;
+extern struct bus_type of_bus_type;
 
 /*
  * The of_device is a kind of "base class" that is a superset of
@@ -16,8 +18,16 @@ extern struct bus_type sbus_bus_type;
  */
 struct of_device
 {
-       struct device_node      *node;          /* OF device node */
-       struct device           dev;            /* Generic device interface */
+       struct device_node              *node;
+       struct device                   dev;
+       struct resource                 resource[PROMREG_MAX];
+       unsigned int                    irq;
+
+       void                            *sysdata;
+
+       int                             slot;
+       int                             portid;
+       int                             clock_freq;
 };
 #define        to_of_device(d) container_of(d, struct of_device, dev)
 
index 7032d02..b4a061c 100644 (file)
@@ -69,6 +69,8 @@ struct device_node {
 #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
 #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
 
+#define OF_BAD_ADDR    ((u64)-1)
+
 static inline void set_node_proc_entry(struct device_node *dn, struct proc_dir_entry *de)
 {
        dn->pde = de;
index 024088e..27bc086 100644 (file)
@@ -4,11 +4,13 @@
 
 #include <linux/device.h>
 #include <linux/mod_devicetable.h>
+#include <asm/openprom.h>
 #include <asm/prom.h>
 
 extern struct bus_type isa_bus_type;
 extern struct bus_type ebus_bus_type;
 extern struct bus_type sbus_bus_type;
+extern struct bus_type of_bus_type;
 
 /*
  * The of_device is a kind of "base class" that is a superset of
@@ -17,8 +19,16 @@ extern struct bus_type sbus_bus_type;
  */
 struct of_device
 {
-       struct device_node      *node;          /* OF device node */
-       struct device           dev;            /* Generic device interface */
+       struct device_node              *node;
+       struct device                   dev;
+       struct resource                 resource[PROMREG_MAX];
+       unsigned int                    irq;
+
+       void                            *sysdata;
+
+       int                             slot;
+       int                             portid;
+       int                             clock_freq;
 };
 #define        to_of_device(d) container_of(d, struct of_device, dev)
 
index 4cecfe6..d284931 100644 (file)
@@ -69,6 +69,8 @@ struct device_node {
 #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
 #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
 
+#define OF_BAD_ADDR    ((u64)-1)
+
 static inline void set_node_proc_entry(struct device_node *dn, struct proc_dir_entry *de)
 {
        dn->pde = de;