}
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_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 isa_bus_type = {
.name = "isa",
};
EXPORT_SYMBOL(of_bus_type);
-static inline u64 of_read_addr(u32 *cell, int size)
+static inline u64 of_read_addr(const u32 *cell, int size)
{
u64 r = 0;
while (size--)
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);
+ int (*map)(u32 *addr, const u32 *range,
+ int na, int ns, int pna);
unsigned int (*get_flags)(u32 *addr);
};
get_cells(dev, addrc, sizec);
}
-static u64 of_bus_default_map(u32 *addr, u32 *range, int na, int ns, int pna)
+/* 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 cp, s, da;
+ u64 a = of_read_addr(addr, na);
+ u64 b = of_read_addr(base, na);
- cp = of_read_addr(range, na);
- s = of_read_addr(range + na + pna, ns);
- da = of_read_addr(addr, na);
+ if (a < b)
+ return 1;
+
+ b += of_read_addr(size, ns);
+ if (a >= b)
+ return 1;
- if (da < cp || da >= (cp + s))
- return OF_BAD_ADDR;
- return da - cp;
+ return 0;
}
-static int of_bus_default_translate(u32 *addr, u64 offset, int na)
+static int of_bus_default_map(u32 *addr, const u32 *range,
+ int na, int ns, int pna)
{
- 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;
+ 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;
}
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");
+ if (!strcmp(np->type, "pci") || !strcmp(np->type, "pciex")) {
+ /* 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 void of_bus_pci_count_cells(struct device_node *np,
*sizec = 2;
}
-static u64 of_bus_pci_map(u32 *addr, u32 *range, int na, int ns, int pna)
+static int of_bus_pci_map(u32 *addr, const u32 *range,
+ int na, int ns, int pna)
{
- u64 cp, s, da;
+ u32 result[OF_MAX_ADDR_CELLS];
+ int i;
/* Check address type match */
if ((addr[0] ^ range[0]) & 0x03000000)
- return OF_BAD_ADDR;
+ return -EINVAL;
- /* 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 (of_out_of_range(addr + 1, range + 1, range + na + pna,
+ na - 1, ns))
+ return -EINVAL;
- if (da < cp || da >= (cp + s))
- return OF_BAD_ADDR;
- return da - cp;
-}
+ /* Start with the parent range base. */
+ memcpy(result, range + na, pna * 4);
-static int of_bus_pci_translate(u32 *addr, u64 offset, int na)
-{
- return of_bus_default_translate(addr + 1, offset, na - 1);
+ /* 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 int of_bus_pci_get_flags(u32 *addr)
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
*/
*sizec = 1;
}
-static u64 of_bus_sbus_map(u32 *addr, u32 *range, int na, int ns, int pna)
+static int of_bus_sbus_map(u32 *addr, const 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;
.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",
.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 */
.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,
},
};
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;
+ 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) {
- offset = bus->map(addr, ranges, na, ns, pna);
- if (offset != OF_BAD_ADDR)
- break;
+ if (!bus->map(addr, ranges, na, ns, pna))
+ return 0;
}
- if (offset == OF_BAD_ADDR)
+
+ return 1;
+}
+
+static int __init use_1to1_mapping(struct device_node *pp)
+{
+ char *model;
+
+ /* If this is on the PMU bus, don't try to translate it even
+ * if a ranges property exists.
+ */
+ if (!strcmp(pp->name, "pmu"))
return 1;
- memcpy(addr, ranges + na, 4 * pna);
+ /* If we have a ranges property in the parent, use it. */
+ if (of_find_property(pp, "ranges", NULL) != NULL)
+ return 0;
-finish:
- /* Translate it into parent bus space */
- return pbus->translate(addr, offset, pna);
+ /* If the parent is the dma node of an ISA bus, pass
+ * the translation up to the root.
+ */
+ if (!strcmp(pp->name, "dma"))
+ return 0;
+
+ /* Similarly for Simba PCI bridges. */
+ model = of_get_property(pp, "model", NULL);
+ if (model && !strcmp(model, "SUNW,simba"))
+ return 0;
+
+ return 1;
}
+static int of_resource_verbose;
+
static void __init build_device_resources(struct of_device *op,
struct device *parent)
{
/* Convert to num-cells. */
num_reg /= 4;
- /* Conver to num-entries. */
+ /* Convert to num-entries. */
num_reg /= na + ns;
+ /* Prevent overruning 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];
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")) {
+ if (use_1to1_mapping(pp)) {
result = of_read_addr(addr, na);
goto build_res;
}
pbus = of_match_bus(pp);
pbus->count_cells(dp, &pna, &pns);
- if (build_one_resource(dp, bus, pbus, addr, dna, dns, pna))
+ if (build_one_resource(dp, bus, pbus, addr,
+ dna, dns, pna))
break;
dna = pna;
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;
}
}
+static struct device_node * __init
+apply_interrupt_map(struct device_node *dp, struct device_node *pp,
+ u32 *imap, int imlen, u32 *imask,
+ unsigned int *irq_p)
+{
+ struct device_node *cp;
+ unsigned int irq = *irq_p;
+ struct of_bus *bus;
+ phandle handle;
+ 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)
+{
+ struct linux_prom_pci_registers *regs;
+ unsigned int devfn, slot, ret;
+
+ if (irq < 1 || irq > 4)
+ return irq;
+
+ regs = of_get_property(dp, "reg", NULL);
+ if (!regs)
+ return irq;
+
+ devfn = (regs->phys_hi >> 8) & 0xff;
+ slot = (devfn >> 3) & 0x1f;
+
+ 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;
+
+ 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);
+
+ return irq;
+ }
+
+ /* 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) {
+ 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->type, "pci") ||
+ !strcmp(pp->type, "pciex")) {
+ 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);
+
+ 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);
unsigned int *irq;
- int len;
+ int len, i;
if (!op)
return NULL;
op->portid = of_getintprop_default(dp, "portid", -1);
irq = of_get_property(dp, "interrupts", &len);
- if (irq)
- op->irq = *irq;
- else
- op->irq = 0xffffffff;
+ if (irq) {
+ memcpy(op->irqs, irq, len);
+ op->num_irqs = len / 4;
+ } else {
+ op->num_irqs = 0;
+ }
+
+ /* Prevent overruning 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_bus_type;
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);
+
int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus)
{
/* initialize common driver fields */
if (rc)
return rc;
- device_create_file(&ofdev->dev, &dev_attr_devspec);
+ rc = device_create_file(&ofdev->dev, &dev_attr_devspec);
+ if (rc)
+ device_unregister(&ofdev->dev);
- return 0;
+ return rc;
}
void of_device_unregister(struct of_device *ofdev)
git.openpandora.org / pandora-kernel.git / blobdiff