+++ /dev/null
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/of.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/mod_devicetable.h>
-#include <linux/slab.h>
-#include <linux/errno.h>
-#include <linux/irq.h>
-#include <linux/of_device.h>
-#include <linux/of_platform.h>
-
-void __iomem *of_ioremap(struct resource *res, unsigned long offset, unsigned long size, char *name)
-{
- unsigned long ret = res->start + offset;
- struct resource *r;
-
- if (res->flags & IORESOURCE_MEM)
- r = request_mem_region(ret, size, name);
- else
- r = request_region(ret, size, name);
- if (!r)
- ret = 0;
-
- return (void __iomem *) ret;
-}
-EXPORT_SYMBOL(of_ioremap);
-
-void of_iounmap(struct resource *res, void __iomem *base, unsigned long size)
-{
- if (res->flags & IORESOURCE_MEM)
- release_mem_region((unsigned long) base, size);
- else
- release_region((unsigned long) base, size);
-}
-EXPORT_SYMBOL(of_iounmap);
-
-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_platform_bus_type, NULL,
- dp, node_match);
-
- if (dev)
- return to_of_device(dev);
-
- return NULL;
-}
-EXPORT_SYMBOL(of_find_device_by_node);
-
-unsigned int irq_of_parse_and_map(struct device_node *node, int index)
-{
- struct of_device *op = of_find_device_by_node(node);
-
- if (!op || index >= op->num_irqs)
- return 0;
-
- return op->irqs[index];
-}
-EXPORT_SYMBOL(irq_of_parse_and_map);
-
-/* Take the archdata values for IOMMU, STC, and HOSTDATA found in
- * BUS and propagate to all child of_device objects.
- */
-void of_propagate_archdata(struct of_device *bus)
-{
- struct dev_archdata *bus_sd = &bus->dev.archdata;
- struct device_node *bus_dp = bus->node;
- struct device_node *dp;
-
- for (dp = bus_dp->child; dp; dp = dp->sibling) {
- struct of_device *op = of_find_device_by_node(dp);
-
- op->dev.archdata.iommu = bus_sd->iommu;
- op->dev.archdata.stc = bus_sd->stc;
- op->dev.archdata.host_controller = bus_sd->host_controller;
- op->dev.archdata.numa_node = bus_sd->numa_node;
-
- if (dp->child)
- of_propagate_archdata(op);
- }
-}
-
-struct bus_type of_platform_bus_type;
-EXPORT_SYMBOL(of_platform_bus_type);
-
-static inline u64 of_read_addr(const 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);
- int (*map)(u32 *addr, const u32 *range,
- int na, int ns, int pna);
- unsigned long (*get_flags)(const u32 *addr, unsigned long);
-};
-
-/*
- * Default translator (generic bus)
- */
-
-static void of_bus_default_count_cells(struct device_node *dev,
- int *addrc, int *sizec)
-{
- get_cells(dev, addrc, sizec);
-}
-
-/* Make sure the least significant 64-bits are in-range. Even
- * for 3 or 4 cell values it is a good enough approximation.
- */
-static int of_out_of_range(const u32 *addr, const u32 *base,
- const u32 *size, int na, int ns)
-{
- u64 a = of_read_addr(addr, na);
- u64 b = of_read_addr(base, na);
-
- if (a < b)
- return 1;
-
- b += of_read_addr(size, ns);
- if (a >= b)
- return 1;
-
- return 0;
-}
-
-static int of_bus_default_map(u32 *addr, const u32 *range,
- int na, int ns, int pna)
-{
- u32 result[OF_MAX_ADDR_CELLS];
- int i;
-
- if (ns > 2) {
- printk("of_device: Cannot handle size cells (%d) > 2.", ns);
- return -EINVAL;
- }
-
- if (of_out_of_range(addr, range, range + na + pna, na, ns))
- return -EINVAL;
-
- /* Start with the parent range base. */
- memcpy(result, range + na, pna * 4);
-
- /* Add in the child address offset. */
- for (i = 0; i < na; i++)
- result[pna - 1 - i] +=
- (addr[na - 1 - i] -
- range[na - 1 - i]);
-
- memcpy(addr, result, pna * 4);
-
- return 0;
-}
-
-static unsigned long of_bus_default_get_flags(const u32 *addr, unsigned long flags)
-{
- if (flags)
- return flags;
- return IORESOURCE_MEM;
-}
-
-/*
- * PCI bus specific translator
- */
-
-static int of_bus_pci_match(struct device_node *np)
-{
- if (!strcmp(np->name, "pci")) {
- const char *model = of_get_property(np, "model", NULL);
-
- if (model && !strcmp(model, "SUNW,simba"))
- return 0;
-
- /* Do not do PCI specific frobbing if the
- * PCI bridge lacks a ranges property. We
- * want to pass it through up to the next
- * parent as-is, not with the PCI translate
- * method which chops off the top address cell.
- */
- if (!of_find_property(np, "ranges", NULL))
- return 0;
-
- return 1;
- }
-
- return 0;
-}
-
-static int of_bus_simba_match(struct device_node *np)
-{
- const char *model = of_get_property(np, "model", NULL);
-
- if (model && !strcmp(model, "SUNW,simba"))
- return 1;
-
- /* Treat PCI busses lacking ranges property just like
- * simba.
- */
- if (!strcmp(np->name, "pci")) {
- if (!of_find_property(np, "ranges", NULL))
- return 1;
- }
-
- return 0;
-}
-
-static int of_bus_simba_map(u32 *addr, const u32 *range,
- int na, int ns, int pna)
-{
- return 0;
-}
-
-static void of_bus_pci_count_cells(struct device_node *np,
- int *addrc, int *sizec)
-{
- if (addrc)
- *addrc = 3;
- if (sizec)
- *sizec = 2;
-}
-
-static int of_bus_pci_map(u32 *addr, const u32 *range,
- int na, int ns, int pna)
-{
- u32 result[OF_MAX_ADDR_CELLS];
- int i;
-
- /* Check address type match */
- if ((addr[0] ^ range[0]) & 0x03000000)
- return -EINVAL;
-
- if (of_out_of_range(addr + 1, range + 1, range + na + pna,
- na - 1, ns))
- return -EINVAL;
-
- /* Start with the parent range base. */
- memcpy(result, range + na, pna * 4);
-
- /* Add in the child address offset, skipping high cell. */
- for (i = 0; i < na - 1; i++)
- result[pna - 1 - i] +=
- (addr[na - 1 - i] -
- range[na - 1 - i]);
-
- memcpy(addr, result, pna * 4);
-
- return 0;
-}
-
-static unsigned long of_bus_pci_get_flags(const u32 *addr, unsigned long flags)
-{
- u32 w = addr[0];
-
- /* For PCI, we override whatever child busses may have used. */
- flags = 0;
- switch((w >> 24) & 0x03) {
- case 0x01:
- flags |= IORESOURCE_IO;
- break;
-
- case 0x02: /* 32 bits */
- case 0x03: /* 64 bits */
- flags |= IORESOURCE_MEM;
- break;
- }
- 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;
-}
-
-/*
- * FHC/Central bus specific translator.
- *
- * This is just needed to hard-code the address and size cell
- * counts. 'fhc' and 'central' nodes lack the #address-cells and
- * #size-cells properties, and if you walk to the root on such
- * Enterprise boxes all you'll get is a #size-cells of 2 which is
- * not what we want to use.
- */
-static int of_bus_fhc_match(struct device_node *np)
-{
- return !strcmp(np->name, "fhc") ||
- !strcmp(np->name, "central");
-}
-
-#define of_bus_fhc_count_cells of_bus_sbus_count_cells
-
-/*
- * 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,
- .get_flags = of_bus_pci_get_flags,
- },
- /* SIMBA */
- {
- .name = "simba",
- .addr_prop_name = "assigned-addresses",
- .match = of_bus_simba_match,
- .count_cells = of_bus_pci_count_cells,
- .map = of_bus_simba_map,
- .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_default_map,
- .get_flags = of_bus_default_get_flags,
- },
- /* FHC */
- {
- .name = "fhc",
- .addr_prop_name = "reg",
- .match = of_bus_fhc_match,
- .count_cells = of_bus_fhc_count_cells,
- .map = of_bus_default_map,
- .get_flags = of_bus_default_get_flags,
- },
- /* Default */
- {
- .name = "default",
- .addr_prop_name = "reg",
- .match = NULL,
- .count_cells = of_bus_default_count_cells,
- .map = of_bus_default_map,
- .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)
-{
- const u32 *ranges;
- int rone, rlen;
-
- ranges = of_get_property(parent, "ranges", &rlen);
- if (ranges == NULL || rlen == 0) {
- u32 result[OF_MAX_ADDR_CELLS];
- int i;
-
- memset(result, 0, pna * 4);
- for (i = 0; i < na; i++)
- result[pna - 1 - i] =
- addr[na - 1 - i];
-
- memcpy(addr, result, pna * 4);
- return 0;
- }
-
- /* Now walk through the ranges */
- rlen /= 4;
- rone = na + pna + ns;
- for (; rlen >= rone; rlen -= rone, ranges += rone) {
- if (!bus->map(addr, ranges, na, ns, pna))
- return 0;
- }
-
- /* When we miss an I/O space match on PCI, just pass it up
- * to the next PCI bridge and/or controller.
- */
- if (!strcmp(bus->name, "pci") &&
- (addr[0] & 0x03000000) == 0x01000000)
- return 0;
-
- return 1;
-}
-
-static int __init use_1to1_mapping(struct device_node *pp)
-{
- /* If we have a ranges property in the parent, use it. */
- if (of_find_property(pp, "ranges", NULL) != NULL)
- return 0;
-
- /* If the parent is the dma node of an ISA bus, pass
- * the translation up to the root.
- *
- * Some SBUS devices use intermediate nodes to express
- * hierarchy within the device itself. These aren't
- * real bus nodes, and don't have a 'ranges' property.
- * But, we should still pass the translation work up
- * to the SBUS itself.
- */
- if (!strcmp(pp->name, "dma") ||
- !strcmp(pp->name, "espdma") ||
- !strcmp(pp->name, "ledma") ||
- !strcmp(pp->name, "lebuffer"))
- return 0;
-
- /* Similarly for all PCI bridges, if we get this far
- * it lacks a ranges property, and this will include
- * cases like Simba.
- */
- if (!strcmp(pp->name, "pci"))
- return 0;
-
- return 1;
-}
-
-static int of_resource_verbose;
-
-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;
- const 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;
-
- /* Convert to num-entries. */
- num_reg /= na + ns;
-
- /* Prevent overrunning the op->resources[] array. */
- if (num_reg > PROMREG_MAX) {
- printk(KERN_WARNING "%s: Too many regs (%d), "
- "limiting to %d.\n",
- op->node->full_name, num_reg, PROMREG_MAX);
- num_reg = PROMREG_MAX;
- }
-
- for (index = 0; index < num_reg; index++) {
- struct resource *r = &op->resource[index];
- u32 addr[OF_MAX_ADDR_CELLS];
- const u32 *reg = (preg + (index * ((na + ns) * 4)));
- struct device_node *dp = op->node;
- struct device_node *pp = p_op->node;
- struct of_bus *pbus, *dbus;
- u64 size, result = OF_BAD_ADDR;
- unsigned long flags;
- int dna, dns;
- int pna, pns;
-
- size = of_read_addr(reg + na, ns);
- memcpy(addr, reg, na * 4);
-
- flags = bus->get_flags(addr, 0);
-
- if (use_1to1_mapping(pp)) {
- result = of_read_addr(addr, na);
- goto build_res;
- }
-
- dna = na;
- dns = ns;
- dbus = bus;
-
- 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, dbus, pbus, addr,
- dna, dns, pna))
- break;
-
- flags = pbus->get_flags(addr, flags);
-
- dna = pna;
- dns = pns;
- dbus = pbus;
- }
-
- build_res:
- memset(r, 0, sizeof(*r));
-
- if (of_resource_verbose)
- printk("%s reg[%d] -> %lx\n",
- op->node->full_name, index,
- result);
-
- if (result != OF_BAD_ADDR) {
- if (tlb_type == hypervisor)
- result &= 0x0fffffffffffffffUL;
-
- r->start = result;
- r->end = result + size - 1;
- r->flags = flags;
- }
- r->name = op->node->name;
- }
-}
-
-static struct device_node * __init
-apply_interrupt_map(struct device_node *dp, struct device_node *pp,
- const u32 *imap, int imlen, const u32 *imask,
- unsigned int *irq_p)
-{
- struct device_node *cp;
- unsigned int irq = *irq_p;
- struct of_bus *bus;
- phandle handle;
- const u32 *reg;
- int na, num_reg, i;
-
- bus = of_match_bus(pp);
- bus->count_cells(dp, &na, NULL);
-
- reg = of_get_property(dp, "reg", &num_reg);
- if (!reg || !num_reg)
- return NULL;
-
- imlen /= ((na + 3) * 4);
- handle = 0;
- for (i = 0; i < imlen; i++) {
- int j;
-
- for (j = 0; j < na; j++) {
- if ((reg[j] & imask[j]) != imap[j])
- goto next;
- }
- if (imap[na] == irq) {
- handle = imap[na + 1];
- irq = imap[na + 2];
- break;
- }
-
- next:
- imap += (na + 3);
- }
- if (i == imlen) {
- /* Psycho and Sabre PCI controllers can have 'interrupt-map'
- * properties that do not include the on-board device
- * interrupts. Instead, the device's 'interrupts' property
- * is already a fully specified INO value.
- *
- * Handle this by deciding that, if we didn't get a
- * match in the parent's 'interrupt-map', and the
- * parent is an IRQ translater, then use the parent as
- * our IRQ controller.
- */
- if (pp->irq_trans)
- return pp;
-
- return NULL;
- }
-
- *irq_p = irq;
- cp = of_find_node_by_phandle(handle);
-
- return cp;
-}
-
-static unsigned int __init pci_irq_swizzle(struct device_node *dp,
- struct device_node *pp,
- unsigned int irq)
-{
- const struct linux_prom_pci_registers *regs;
- unsigned int bus, devfn, slot, ret;
-
- if (irq < 1 || irq > 4)
- return irq;
-
- regs = of_get_property(dp, "reg", NULL);
- if (!regs)
- return irq;
-
- bus = (regs->phys_hi >> 16) & 0xff;
- devfn = (regs->phys_hi >> 8) & 0xff;
- slot = (devfn >> 3) & 0x1f;
-
- if (pp->irq_trans) {
- /* Derived from Table 8-3, U2P User's Manual. This branch
- * is handling a PCI controller that lacks a proper set of
- * interrupt-map and interrupt-map-mask properties. The
- * Ultra-E450 is one example.
- *
- * The bit layout is BSSLL, where:
- * B: 0 on bus A, 1 on bus B
- * D: 2-bit slot number, derived from PCI device number as
- * (dev - 1) for bus A, or (dev - 2) for bus B
- * L: 2-bit line number
- */
- if (bus & 0x80) {
- /* PBM-A */
- bus = 0x00;
- slot = (slot - 1) << 2;
- } else {
- /* PBM-B */
- bus = 0x10;
- slot = (slot - 2) << 2;
- }
- irq -= 1;
-
- ret = (bus | slot | irq);
- } else {
- /* Going through a PCI-PCI bridge that lacks a set of
- * interrupt-map and interrupt-map-mask properties.
- */
- ret = ((irq - 1 + (slot & 3)) & 3) + 1;
- }
-
- return ret;
-}
-
-static int of_irq_verbose;
-
-static unsigned int __init build_one_device_irq(struct of_device *op,
- struct device *parent,
- unsigned int irq)
-{
- struct device_node *dp = op->node;
- struct device_node *pp, *ip;
- unsigned int orig_irq = irq;
- int nid;
-
- if (irq == 0xffffffff)
- return irq;
-
- if (dp->irq_trans) {
- irq = dp->irq_trans->irq_build(dp, irq,
- dp->irq_trans->data);
-
- if (of_irq_verbose)
- printk("%s: direct translate %x --> %x\n",
- dp->full_name, orig_irq, irq);
-
- goto out;
- }
-
- /* Something more complicated. Walk up to the root, applying
- * interrupt-map or bus specific translations, until we hit
- * an IRQ translator.
- *
- * If we hit a bus type or situation we cannot handle, we
- * stop and assume that the original IRQ number was in a
- * format which has special meaning to it's immediate parent.
- */
- pp = dp->parent;
- ip = NULL;
- while (pp) {
- const void *imap, *imsk;
- int imlen;
-
- imap = of_get_property(pp, "interrupt-map", &imlen);
- imsk = of_get_property(pp, "interrupt-map-mask", NULL);
- if (imap && imsk) {
- struct device_node *iret;
- int this_orig_irq = irq;
-
- iret = apply_interrupt_map(dp, pp,
- imap, imlen, imsk,
- &irq);
-
- if (of_irq_verbose)
- printk("%s: Apply [%s:%x] imap --> [%s:%x]\n",
- op->node->full_name,
- pp->full_name, this_orig_irq,
- (iret ? iret->full_name : "NULL"), irq);
-
- if (!iret)
- break;
-
- if (iret->irq_trans) {
- ip = iret;
- break;
- }
- } else {
- if (!strcmp(pp->name, "pci")) {
- unsigned int this_orig_irq = irq;
-
- irq = pci_irq_swizzle(dp, pp, irq);
- if (of_irq_verbose)
- printk("%s: PCI swizzle [%s] "
- "%x --> %x\n",
- op->node->full_name,
- pp->full_name, this_orig_irq,
- irq);
-
- }
-
- if (pp->irq_trans) {
- ip = pp;
- break;
- }
- }
- dp = pp;
- pp = pp->parent;
- }
- if (!ip)
- return orig_irq;
-
- irq = ip->irq_trans->irq_build(op->node, irq,
- ip->irq_trans->data);
- if (of_irq_verbose)
- printk("%s: Apply IRQ trans [%s] %x --> %x\n",
- op->node->full_name, ip->full_name, orig_irq, irq);
-
-out:
- nid = of_node_to_nid(dp);
- if (nid != -1) {
- cpumask_t numa_mask = node_to_cpumask(nid);
-
- irq_set_affinity(irq, numa_mask);
- }
-
- return irq;
-}
-
-static struct of_device * __init scan_one_device(struct device_node *dp,
- struct device *parent)
-{
- struct of_device *op = kzalloc(sizeof(*op), GFP_KERNEL);
- const unsigned int *irq;
- struct dev_archdata *sd;
- int len, i;
-
- if (!op)
- return NULL;
-
- sd = &op->dev.archdata;
- sd->prom_node = dp;
- sd->op = op;
-
- 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) {
- memcpy(op->irqs, irq, len);
- op->num_irqs = len / 4;
- } else {
- op->num_irqs = 0;
- }
-
- /* Prevent overrunning the op->irqs[] array. */
- if (op->num_irqs > PROMINTR_MAX) {
- printk(KERN_WARNING "%s: Too many irqs (%d), "
- "limiting to %d.\n",
- dp->full_name, op->num_irqs, PROMINTR_MAX);
- op->num_irqs = PROMINTR_MAX;
- }
-
- build_device_resources(op, parent);
- for (i = 0; i < op->num_irqs; i++)
- op->irqs[i] = build_one_device_irq(op, parent, op->irqs[i]);
-
- op->dev.parent = parent;
- op->dev.bus = &of_platform_bus_type;
- if (!parent)
- dev_set_name(&op->dev, "root");
- else
- dev_set_name(&op->dev, "%08x", dp->node);
-
- 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;
-
- err = of_bus_type_init(&of_platform_bus_type, "of");
- if (!err)
- scan_of_devices();
-
- return err;
-}
-
-postcore_initcall(of_bus_driver_init);
-
-static int __init of_debug(char *str)
-{
- int val = 0;
-
- get_option(&str, &val);
- if (val & 1)
- of_resource_verbose = 1;
- if (val & 2)
- of_irq_verbose = 1;
- return 1;
-}
-
-__setup("of_debug=", of_debug);
git.samba.org / sfrench / cifs-2.6.git / blobdiff