1045 lines
26 KiB
C
1045 lines
26 KiB
C
#undef DEBUG
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/string.h>
|
|
#include <linux/pci_regs.h>
|
|
#include <linux/module.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/etherdevice.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/pci-bridge.h>
|
|
|
|
#ifdef DEBUG
|
|
#define DBG(fmt...) do { printk(fmt); } while(0)
|
|
#else
|
|
#define DBG(fmt...) do { } while(0)
|
|
#endif
|
|
|
|
#ifdef CONFIG_PPC64
|
|
#define PRu64 "%lx"
|
|
#else
|
|
#define PRu64 "%llx"
|
|
#endif
|
|
|
|
/* Max address size we deal with */
|
|
#define OF_MAX_ADDR_CELLS 4
|
|
#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
|
|
(ns) > 0)
|
|
|
|
static struct of_bus *of_match_bus(struct device_node *np);
|
|
static int __of_address_to_resource(struct device_node *dev,
|
|
const u32 *addrp, u64 size, unsigned int flags,
|
|
struct resource *r);
|
|
|
|
|
|
/* Debug utility */
|
|
#ifdef DEBUG
|
|
static void of_dump_addr(const char *s, const u32 *addr, int na)
|
|
{
|
|
printk("%s", s);
|
|
while(na--)
|
|
printk(" %08x", *(addr++));
|
|
printk("\n");
|
|
}
|
|
#else
|
|
static void of_dump_addr(const char *s, const u32 *addr, int na) { }
|
|
#endif
|
|
|
|
|
|
/* Callbacks for bus specific translators */
|
|
struct of_bus {
|
|
const char *name;
|
|
const char *addresses;
|
|
int (*match)(struct device_node *parent);
|
|
void (*count_cells)(struct device_node *child,
|
|
int *addrc, int *sizec);
|
|
u64 (*map)(u32 *addr, const u32 *range,
|
|
int na, int ns, int pna);
|
|
int (*translate)(u32 *addr, u64 offset, int na);
|
|
unsigned int (*get_flags)(const u32 *addr);
|
|
};
|
|
|
|
|
|
/*
|
|
* Default translator (generic bus)
|
|
*/
|
|
|
|
static void of_bus_default_count_cells(struct device_node *dev,
|
|
int *addrc, int *sizec)
|
|
{
|
|
if (addrc)
|
|
*addrc = of_n_addr_cells(dev);
|
|
if (sizec)
|
|
*sizec = of_n_size_cells(dev);
|
|
}
|
|
|
|
static u64 of_bus_default_map(u32 *addr, const u32 *range,
|
|
int na, int ns, int pna)
|
|
{
|
|
u64 cp, s, da;
|
|
|
|
cp = of_read_number(range, na);
|
|
s = of_read_number(range + na + pna, ns);
|
|
da = of_read_number(addr, na);
|
|
|
|
DBG("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
|
|
cp, s, da);
|
|
|
|
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_number(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(const u32 *addr)
|
|
{
|
|
return IORESOURCE_MEM;
|
|
}
|
|
|
|
|
|
#ifdef CONFIG_PCI
|
|
/*
|
|
* PCI bus specific translator
|
|
*/
|
|
|
|
static int of_bus_pci_match(struct device_node *np)
|
|
{
|
|
/* "vci" is for the /chaos bridge on 1st-gen PCI powermacs */
|
|
return !strcmp(np->type, "pci") || !strcmp(np->type, "vci");
|
|
}
|
|
|
|
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, const 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_number(range + 1, na - 1);
|
|
s = of_read_number(range + na + pna, ns);
|
|
da = of_read_number(addr + 1, na - 1);
|
|
|
|
DBG("OF: PCI map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da);
|
|
|
|
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(const u32 *addr)
|
|
{
|
|
unsigned int flags = 0;
|
|
u32 w = addr[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;
|
|
}
|
|
|
|
const u32 *of_get_pci_address(struct device_node *dev, int bar_no, 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);
|
|
if (strcmp(bus->name, "pci")) {
|
|
of_node_put(parent);
|
|
return NULL;
|
|
}
|
|
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, &psize);
|
|
if (prop == NULL)
|
|
return NULL;
|
|
psize /= 4;
|
|
|
|
onesize = na + ns;
|
|
for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++)
|
|
if ((prop[0] & 0xff) == ((bar_no * 4) + PCI_BASE_ADDRESS_0)) {
|
|
if (size)
|
|
*size = of_read_number(prop + na, ns);
|
|
if (flags)
|
|
*flags = bus->get_flags(prop);
|
|
return prop;
|
|
}
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(of_get_pci_address);
|
|
|
|
int of_pci_address_to_resource(struct device_node *dev, int bar,
|
|
struct resource *r)
|
|
{
|
|
const u32 *addrp;
|
|
u64 size;
|
|
unsigned int flags;
|
|
|
|
addrp = of_get_pci_address(dev, bar, &size, &flags);
|
|
if (addrp == NULL)
|
|
return -EINVAL;
|
|
return __of_address_to_resource(dev, addrp, size, flags, r);
|
|
}
|
|
EXPORT_SYMBOL_GPL(of_pci_address_to_resource);
|
|
|
|
static u8 of_irq_pci_swizzle(u8 slot, u8 pin)
|
|
{
|
|
return (((pin - 1) + slot) % 4) + 1;
|
|
}
|
|
|
|
int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq)
|
|
{
|
|
struct device_node *dn, *ppnode;
|
|
struct pci_dev *ppdev;
|
|
u32 lspec;
|
|
u32 laddr[3];
|
|
u8 pin;
|
|
int rc;
|
|
|
|
/* Check if we have a device node, if yes, fallback to standard OF
|
|
* parsing
|
|
*/
|
|
dn = pci_device_to_OF_node(pdev);
|
|
if (dn)
|
|
return of_irq_map_one(dn, 0, out_irq);
|
|
|
|
/* Ok, we don't, time to have fun. Let's start by building up an
|
|
* interrupt spec. we assume #interrupt-cells is 1, which is standard
|
|
* for PCI. If you do different, then don't use that routine.
|
|
*/
|
|
rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);
|
|
if (rc != 0)
|
|
return rc;
|
|
/* No pin, exit */
|
|
if (pin == 0)
|
|
return -ENODEV;
|
|
|
|
/* Now we walk up the PCI tree */
|
|
lspec = pin;
|
|
for (;;) {
|
|
/* Get the pci_dev of our parent */
|
|
ppdev = pdev->bus->self;
|
|
|
|
/* Ouch, it's a host bridge... */
|
|
if (ppdev == NULL) {
|
|
#ifdef CONFIG_PPC64
|
|
ppnode = pci_bus_to_OF_node(pdev->bus);
|
|
#else
|
|
struct pci_controller *host;
|
|
host = pci_bus_to_host(pdev->bus);
|
|
ppnode = host ? host->arch_data : NULL;
|
|
#endif
|
|
/* No node for host bridge ? give up */
|
|
if (ppnode == NULL)
|
|
return -EINVAL;
|
|
} else
|
|
/* We found a P2P bridge, check if it has a node */
|
|
ppnode = pci_device_to_OF_node(ppdev);
|
|
|
|
/* Ok, we have found a parent with a device-node, hand over to
|
|
* the OF parsing code.
|
|
* We build a unit address from the linux device to be used for
|
|
* resolution. Note that we use the linux bus number which may
|
|
* not match your firmware bus numbering.
|
|
* Fortunately, in most cases, interrupt-map-mask doesn't include
|
|
* the bus number as part of the matching.
|
|
* You should still be careful about that though if you intend
|
|
* to rely on this function (you ship a firmware that doesn't
|
|
* create device nodes for all PCI devices).
|
|
*/
|
|
if (ppnode)
|
|
break;
|
|
|
|
/* We can only get here if we hit a P2P bridge with no node,
|
|
* let's do standard swizzling and try again
|
|
*/
|
|
lspec = of_irq_pci_swizzle(PCI_SLOT(pdev->devfn), lspec);
|
|
pdev = ppdev;
|
|
}
|
|
|
|
laddr[0] = (pdev->bus->number << 16)
|
|
| (pdev->devfn << 8);
|
|
laddr[1] = laddr[2] = 0;
|
|
return of_irq_map_raw(ppnode, &lspec, 1, laddr, out_irq);
|
|
}
|
|
EXPORT_SYMBOL_GPL(of_irq_map_pci);
|
|
#endif /* CONFIG_PCI */
|
|
|
|
/*
|
|
* 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, const 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_number(range + 1, na - 1);
|
|
s = of_read_number(range + na + pna, ns);
|
|
da = of_read_number(addr + 1, na - 1);
|
|
|
|
DBG("OF: ISA map, cp="PRu64", s="PRu64", da="PRu64"\n", cp, s, da);
|
|
|
|
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(const u32 *addr)
|
|
{
|
|
unsigned int flags = 0;
|
|
u32 w = addr[0];
|
|
|
|
if (w & 1)
|
|
flags |= IORESOURCE_IO;
|
|
else
|
|
flags |= IORESOURCE_MEM;
|
|
return flags;
|
|
}
|
|
|
|
|
|
/*
|
|
* Array of bus specific translators
|
|
*/
|
|
|
|
static struct of_bus of_busses[] = {
|
|
#ifdef CONFIG_PCI
|
|
/* PCI */
|
|
{
|
|
.name = "pci",
|
|
.addresses = "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,
|
|
},
|
|
#endif /* CONFIG_PCI */
|
|
/* ISA */
|
|
{
|
|
.name = "isa",
|
|
.addresses = "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,
|
|
},
|
|
/* Default */
|
|
{
|
|
.name = "default",
|
|
.addresses = "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 of_translate_one(struct device_node *parent, struct of_bus *bus,
|
|
struct of_bus *pbus, u32 *addr,
|
|
int na, int ns, int pna)
|
|
{
|
|
const u32 *ranges;
|
|
unsigned int rlen;
|
|
int rone;
|
|
u64 offset = OF_BAD_ADDR;
|
|
|
|
/* Normally, an absence of a "ranges" property means we are
|
|
* crossing a non-translatable boundary, and thus the addresses
|
|
* 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", &rlen);
|
|
if (ranges == NULL || rlen == 0) {
|
|
offset = of_read_number(addr, na);
|
|
memset(addr, 0, pna * 4);
|
|
DBG("OF: no ranges, 1:1 translation\n");
|
|
goto finish;
|
|
}
|
|
|
|
DBG("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) {
|
|
DBG("OF: not found !\n");
|
|
return 1;
|
|
}
|
|
memcpy(addr, ranges + na, 4 * pna);
|
|
|
|
finish:
|
|
of_dump_addr("OF: parent translation for:", addr, pna);
|
|
DBG("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;
|
|
|
|
DBG("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);
|
|
|
|
DBG("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) {
|
|
DBG("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;
|
|
}
|
|
|
|
DBG("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, &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 = 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;
|
|
|
|
DBG("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) {
|
|
DBG(" -> no parent found !\n");
|
|
goto fail;
|
|
}
|
|
|
|
DBG("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;
|
|
|
|
DBG(" -> 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) {
|
|
DBG(" -> 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) {
|
|
DBG(" -> 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) {
|
|
DBG(" -> 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;
|
|
|
|
DBG(" -> 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) {
|
|
DBG(" -> 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) {
|
|
DBG(" -> parent lacks #interrupt-cells !\n");
|
|
goto fail;
|
|
}
|
|
newintsize = *tmp;
|
|
tmp = of_get_property(newpar, "#address-cells", NULL);
|
|
newaddrsize = (tmp == NULL) ? 0 : *tmp;
|
|
|
|
DBG(" -> newintsize=%d, newaddrsize=%d\n",
|
|
newintsize, newaddrsize);
|
|
|
|
/* Check for malformed properties */
|
|
if (imaplen < (newaddrsize + newintsize))
|
|
goto fail;
|
|
|
|
imap += newaddrsize + newintsize;
|
|
imaplen -= newaddrsize + newintsize;
|
|
|
|
DBG(" -> 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 */
|
|
DBG(" -> 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);
|
|
|
|
#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
|
|
static int of_irq_map_oldworld(struct device_node *device, int index,
|
|
struct of_irq *out_irq)
|
|
{
|
|
const u32 *ints = NULL;
|
|
int intlen;
|
|
|
|
/*
|
|
* Old machines just have a list of interrupt numbers
|
|
* and no interrupt-controller nodes. We also have dodgy
|
|
* cases where the APPL,interrupts property is completely
|
|
* missing behind pci-pci bridges and we have to get it
|
|
* from the parent (the bridge itself, as apple just wired
|
|
* everything together on these)
|
|
*/
|
|
while (device) {
|
|
ints = of_get_property(device, "AAPL,interrupts", &intlen);
|
|
if (ints != NULL)
|
|
break;
|
|
device = device->parent;
|
|
if (device && strcmp(device->type, "pci") != 0)
|
|
break;
|
|
}
|
|
if (ints == NULL)
|
|
return -EINVAL;
|
|
intlen /= sizeof(u32);
|
|
|
|
if (index >= intlen)
|
|
return -EINVAL;
|
|
|
|
out_irq->controller = NULL;
|
|
out_irq->specifier[0] = ints[index];
|
|
out_irq->size = 1;
|
|
|
|
return 0;
|
|
}
|
|
#else /* defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32) */
|
|
static int of_irq_map_oldworld(struct device_node *device, int index,
|
|
struct of_irq *out_irq)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
#endif /* !(defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)) */
|
|
|
|
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;
|
|
|
|
DBG("of_irq_map_one: dev=%s, index=%d\n", device->full_name, index);
|
|
|
|
/* OldWorld mac stuff is "special", handle out of line */
|
|
if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC)
|
|
return of_irq_map_oldworld(device, index, out_irq);
|
|
|
|
/* Get the interrupts property */
|
|
intspec = of_get_property(device, "interrupts", &intlen);
|
|
if (intspec == NULL)
|
|
return -EINVAL;
|
|
intlen /= sizeof(u32);
|
|
|
|
/* 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;
|
|
|
|
DBG(" 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);
|
|
|