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Diffstat (limited to 'arch/powerpc/kernel/prom_parse.c')
-rw-r--r--arch/powerpc/kernel/prom_parse.c93
1 files changed, 66 insertions, 27 deletions
diff --git a/arch/powerpc/kernel/prom_parse.c b/arch/powerpc/kernel/prom_parse.c
index 12c51e4ad2b4..aa40a5307294 100644
--- a/arch/powerpc/kernel/prom_parse.c
+++ b/arch/powerpc/kernel/prom_parse.c
@@ -5,6 +5,7 @@
#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>
@@ -67,9 +68,9 @@ static void of_bus_default_count_cells(struct device_node *dev,
int *addrc, int *sizec)
{
if (addrc)
- *addrc = prom_n_addr_cells(dev);
+ *addrc = of_n_addr_cells(dev);
if (sizec)
- *sizec = prom_n_size_cells(dev);
+ *sizec = of_n_size_cells(dev);
}
static u64 of_bus_default_map(u32 *addr, const u32 *range,
@@ -195,7 +196,7 @@ const u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size,
return NULL;
/* Get "reg" or "assigned-addresses" property */
- prop = get_property(dev, bus->addresses, &psize);
+ prop = of_get_property(dev, bus->addresses, &psize);
if (prop == NULL)
return NULL;
psize /= 4;
@@ -437,7 +438,7 @@ static int of_translate_one(struct device_node *parent, struct of_bus *bus,
* to translate addresses that aren't supposed to be translated in
* the first place. --BenH.
*/
- ranges = get_property(parent, "ranges", &rlen);
+ ranges = of_get_property(parent, "ranges", &rlen);
if (ranges == NULL || rlen == 0) {
offset = of_read_number(addr, na);
memset(addr, 0, pna * 4);
@@ -577,7 +578,7 @@ const u32 *of_get_address(struct device_node *dev, int index, u64 *size,
return NULL;
/* Get "reg" or "assigned-addresses" property */
- prop = get_property(dev, bus->addresses, &psize);
+ prop = of_get_property(dev, bus->addresses, &psize);
if (prop == NULL)
return NULL;
psize /= 4;
@@ -649,17 +650,17 @@ void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop,
/* busno is always one cell */
*busno = *(dma_window++);
- prop = get_property(dn, "ibm,#dma-address-cells", NULL);
+ prop = of_get_property(dn, "ibm,#dma-address-cells", NULL);
if (!prop)
- prop = get_property(dn, "#address-cells", NULL);
+ prop = of_get_property(dn, "#address-cells", NULL);
- cells = prop ? *(u32 *)prop : prom_n_addr_cells(dn);
+ cells = prop ? *(u32 *)prop : of_n_addr_cells(dn);
*phys = of_read_number(dma_window, cells);
dma_window += cells;
- prop = get_property(dn, "ibm,#dma-size-cells", NULL);
- cells = prop ? *(u32 *)prop : prom_n_size_cells(dn);
+ 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);
}
@@ -679,7 +680,7 @@ static struct device_node *of_irq_find_parent(struct device_node *child)
return NULL;
do {
- parp = get_property(child, "interrupt-parent", NULL);
+ parp = of_get_property(child, "interrupt-parent", NULL);
if (parp == NULL)
p = of_get_parent(child);
else {
@@ -690,7 +691,7 @@ static struct device_node *of_irq_find_parent(struct device_node *child)
}
of_node_put(child);
child = p;
- } while (p && get_property(p, "#interrupt-cells", NULL) == NULL);
+ } while (p && of_get_property(p, "#interrupt-cells", NULL) == NULL);
return p;
}
@@ -715,7 +716,7 @@ void of_irq_map_init(unsigned int flags)
struct device_node *np;
for(np = NULL; (np = of_find_all_nodes(np)) != NULL;) {
- if (get_property(np, "interrupt-controller", NULL)
+ if (of_get_property(np, "interrupt-controller", NULL)
== NULL)
continue;
/* Skip /chosen/interrupt-controller */
@@ -754,7 +755,7 @@ int of_irq_map_raw(struct device_node *parent, const u32 *intspec, u32 ointsize,
* is none, we are nice and just walk up the tree
*/
do {
- tmp = get_property(ipar, "#interrupt-cells", NULL);
+ tmp = of_get_property(ipar, "#interrupt-cells", NULL);
if (tmp != NULL) {
intsize = *tmp;
break;
@@ -778,7 +779,7 @@ int of_irq_map_raw(struct device_node *parent, const u32 *intspec, u32 ointsize,
*/
old = of_node_get(ipar);
do {
- tmp = get_property(old, "#address-cells", NULL);
+ tmp = of_get_property(old, "#address-cells", NULL);
tnode = of_get_parent(old);
of_node_put(old);
old = tnode;
@@ -794,7 +795,8 @@ int of_irq_map_raw(struct device_node *parent, const u32 *intspec, u32 ointsize,
/* Now check if cursor is an interrupt-controller and if it is
* then we are done
*/
- if (get_property(ipar, "interrupt-controller", NULL) != NULL) {
+ if (of_get_property(ipar, "interrupt-controller", NULL) !=
+ NULL) {
DBG(" -> got it !\n");
memcpy(out_irq->specifier, intspec,
intsize * sizeof(u32));
@@ -805,7 +807,7 @@ int of_irq_map_raw(struct device_node *parent, const u32 *intspec, u32 ointsize,
}
/* Now look for an interrupt-map */
- imap = get_property(ipar, "interrupt-map", &imaplen);
+ 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");
@@ -815,7 +817,7 @@ int of_irq_map_raw(struct device_node *parent, const u32 *intspec, u32 ointsize,
imaplen /= sizeof(u32);
/* Look for a mask */
- imask = get_property(ipar, "interrupt-map-mask", NULL);
+ 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.
@@ -862,15 +864,13 @@ int of_irq_map_raw(struct device_node *parent, const u32 *intspec, u32 ointsize,
/* Get #interrupt-cells and #address-cells of new
* parent
*/
- tmp = get_property(newpar, "#interrupt-cells",
- NULL);
+ tmp = of_get_property(newpar, "#interrupt-cells", NULL);
if (tmp == NULL) {
DBG(" -> parent lacks #interrupt-cells !\n");
goto fail;
}
newintsize = *tmp;
- tmp = get_property(newpar, "#address-cells",
- NULL);
+ tmp = of_get_property(newpar, "#address-cells", NULL);
newaddrsize = (tmp == NULL) ? 0 : *tmp;
DBG(" -> newintsize=%d, newaddrsize=%d\n",
@@ -915,7 +915,7 @@ EXPORT_SYMBOL_GPL(of_irq_map_raw);
static int of_irq_map_oldworld(struct device_node *device, int index,
struct of_irq *out_irq)
{
- const u32 *ints;
+ const u32 *ints = NULL;
int intlen;
/*
@@ -927,7 +927,7 @@ static int of_irq_map_oldworld(struct device_node *device, int index,
* everything together on these)
*/
while (device) {
- ints = get_property(device, "AAPL,interrupts", &intlen);
+ ints = of_get_property(device, "AAPL,interrupts", &intlen);
if (ints != NULL)
break;
device = device->parent;
@@ -969,13 +969,13 @@ int of_irq_map_one(struct device_node *device, int index, struct of_irq *out_irq
return of_irq_map_oldworld(device, index, out_irq);
/* Get the interrupts property */
- intspec = get_property(device, "interrupts", &intlen);
+ intspec = of_get_property(device, "interrupts", &intlen);
if (intspec == NULL)
return -EINVAL;
intlen /= sizeof(u32);
/* Get the reg property (if any) */
- addr = get_property(device, "reg", NULL);
+ addr = of_get_property(device, "reg", NULL);
/* Look for the interrupt parent. */
p = of_irq_find_parent(device);
@@ -983,7 +983,7 @@ int of_irq_map_one(struct device_node *device, int index, struct of_irq *out_irq
return -EINVAL;
/* Get size of interrupt specifier */
- tmp = get_property(p, "#interrupt-cells", NULL);
+ tmp = of_get_property(p, "#interrupt-cells", NULL);
if (tmp == NULL) {
of_node_put(p);
return -EINVAL;
@@ -1003,3 +1003,42 @@ int of_irq_map_one(struct device_node *device, int index, struct of_irq *out_irq
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);
+
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.