bool of_can_translate_address(struct device_node *dev)
{
struct device_node *parent;
struct of_bus *bus;
int na, ns;
parent = of_get_parent(dev);
if (parent == NULL)
return false;
bus = of_match_bus(parent);
bus->count_cells(dev, &na, &ns);
of_node_put(parent);
return OF_CHECK_COUNTS(na, ns);
}
const __be32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size,
unsigned int *flags)
{
const __be32 *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++) {
u32 val = be32_to_cpu(prop[0]);
if ((val & 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;
}
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;
}
/*
* 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
*/
static u64 __of_translate_address(struct device_node *dev,
const __be32 *in_addr, const char *rprop)
{
struct device_node *parent = NULL;
struct of_bus *bus, *pbus;
__be32 addr[OF_MAX_ADDR_CELLS];
int na, ns, pna, pns;
u64 result = OF_BAD_ADDR;
pr_debug("** translation for device %pOF **\n", dev);
/* 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);
/* Count address cells & copy address locally */
bus->count_cells(dev, &na, &ns);
if (!OF_CHECK_COUNTS(na, ns)) {
pr_debug("Bad cell count for %pOF\n", dev);
goto bail;
}
memcpy(addr, in_addr, na * 4);
pr_debug("bus is %s (na=%d, ns=%d) on %pOF\n",
bus->name, na, ns, parent);
of_dump_addr("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) {
pr_debug("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)) {
pr_err("Bad cell count for %pOF\n", dev);
break;
}
pr_debug("parent bus is %s (na=%d, ns=%d) on %pOF\n",
pbus->name, pna, pns, parent);
/* Apply bus translation */
if (of_translate_one(dev, bus, pbus, addr, na, ns, pna, rprop))
break;
/* Complete the move up one level */
na = pna;
ns = pns;
bus = pbus;
of_dump_addr("one level translation:", addr, na);
}
bail:
of_node_put(parent);
of_node_put(dev);
return result;
}
/*
* 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;
}
/*
* 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
*
* Whenever the translation fails, the *host pointer will be set to the
* device that had registered logical PIO mapping, and the return code is
* relative to that node.
*/
static u64 __of_translate_address(struct device_node *dev,
const __be32 *in_addr, const char *rprop,
struct device_node **host)
{
struct device_node *parent = NULL;
struct of_bus *bus, *pbus;
__be32 addr[OF_MAX_ADDR_CELLS];
int na, ns, pna, pns;
u64 result = OF_BAD_ADDR;
pr_debug("** translation for device %pOF **\n", dev);
/* Increase refcount at current level */
of_node_get(dev);
*host = NULL;
/* Get parent & match bus type */
parent = of_get_parent(dev);
if (parent == NULL)
goto bail;
bus = of_match_bus(parent);
/* Count address cells & copy address locally */
bus->count_cells(dev, &na, &ns);
if (!OF_CHECK_COUNTS(na, ns)) {
pr_debug("Bad cell count for %pOF\n", dev);
goto bail;
}
memcpy(addr, in_addr, na * 4);
pr_debug("bus is %s (na=%d, ns=%d) on %pOF\n",
bus->name, na, ns, parent);
of_dump_addr("translating address:", addr, na);
/* Translate */
for (;;) {
struct logic_pio_hwaddr *iorange;
/* Switch to parent bus */
of_node_put(dev);
dev = parent;
parent = of_get_parent(dev);
/* If root, we have finished */
if (parent == NULL) {
pr_debug("reached root node\n");
result = of_read_number(addr, na);
break;
}
/*
* For indirectIO device which has no ranges property, get
* the address from reg directly.
*/
iorange = find_io_range_by_fwnode(&dev->fwnode);
if (iorange && (iorange->flags != LOGIC_PIO_CPU_MMIO)) {
result = of_read_number(addr + 1, na - 1);
pr_debug("indirectIO matched(%pOF) 0x%llx\n",
dev, result);
*host = of_node_get(dev);
break;
}
/* Get new parent bus and counts */
pbus = of_match_bus(parent);
pbus->count_cells(dev, &pna, &pns);
if (!OF_CHECK_COUNTS(pna, pns)) {
pr_err("Bad cell count for %pOF\n", dev);
break;
}
pr_debug("parent bus is %s (na=%d, ns=%d) on %pOF\n",
pbus->name, pna, pns, parent);
/* Apply bus translation */
if (of_translate_one(dev, bus, pbus, addr, na, ns, pna, rprop))
break;
/* Complete the move up one level */
na = pna;
ns = pns;
bus = pbus;
of_dump_addr("one level translation:", addr, na);
}
bail:
of_node_put(parent);
of_node_put(dev);
return result;
}
/*
* 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 __init fdt_translate_address(const void *blob, int node_offset)
{
int parent, len;
const struct of_bus *bus, *pbus;
const __be32 *reg;
__be32 addr[OF_MAX_ADDR_CELLS];
int na, ns, pna, pns;
u64 result = OF_BAD_ADDR;
pr_debug("FDT: ** translation for device %s **\n",
fdt_get_name(blob, node_offset, NULL));
reg = fdt_getprop(blob, node_offset, "reg", &len);
if (!reg) {
pr_err("FDT: warning: device tree node '%s' has no address.\n",
fdt_get_name(blob, node_offset, NULL));
goto bail;
}
/* Get parent & match bus type */
parent = fdt_parent_offset(blob, node_offset);
if (parent < 0)
goto bail;
bus = &of_busses[0];
/* Cound address cells & copy address locally */
bus->count_cells(blob, parent, &na, &ns);
if (!OF_CHECK_COUNTS(na, ns)) {
pr_err("FDT: Bad cell count for %s\n",
fdt_get_name(blob, node_offset, NULL));
goto bail;
}
memcpy(addr, reg, na * 4);
pr_debug("FDT: bus (na=%d, ns=%d) on %s\n",
na, ns, fdt_get_name(blob, parent, NULL));
of_dump_addr("OF: translating address:", addr, na);
/* Translate */
for (;;) {
/* Switch to parent bus */
node_offset = parent;
parent = fdt_parent_offset(blob, node_offset);
/* If root, we have finished */
if (parent < 0) {
pr_debug("FDT: reached root node\n");
result = of_read_number(addr, na);
break;
}
/* Get new parent bus and counts */
pbus = &of_busses[0];
pbus->count_cells(blob, parent, &pna, &pns);
if (!OF_CHECK_COUNTS(pna, pns)) {
pr_err("FDT: Bad cell count for %s\n",
fdt_get_name(blob, node_offset, NULL));
break;
}
pr_debug("FDT: parent bus (na=%d, ns=%d) on %s\n",
pna, pns, fdt_get_name(blob, parent, NULL));
/* Apply bus translation */
if (fdt_translate_one(blob, node_offset, bus, pbus,
addr, na, ns, pna, "ranges"))
break;
/* Complete the move up one level */
na = pna;
ns = pns;
bus = pbus;
of_dump_addr("FDT: one level translation:", addr, na);
}
bail:
return result;
}
u64 __of_translate_address(struct device_node *dev, const __be32 *in_addr,
const char *rprop)
{
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;
pr_debug("OF: ** translation for device %s **\n", dev->full_name);
of_node_get(dev);
parent = of_get_parent(dev);
if (parent == NULL)
goto bail;
bus = of_match_bus(parent);
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);
pr_debug("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);
for (;;) {
of_node_put(dev);
dev = parent;
parent = of_get_parent(dev);
if (parent == NULL) {
pr_debug("OF: reached root node\n");
result = of_read_number(addr, na);
break;
}
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;
}
pr_debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
pbus->name, pna, pns, parent->full_name);
if (of_translate_one(dev, bus, pbus, addr, na, ns, pna, rprop))
break;
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;
}