u-boot/common/fdt_support.c
Simon Glass 336a44877a fdt: Correct fdt_get_base_address()
This function appears to obtain the value of the 'ranges' property rather
than 'reg'. As such it does not behave as documented or expected.

In addition it picks up the second field of the property which is the size
(with prop += naddr) rather than the first which is the address.

Fix it.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-08-01 11:58:00 +09:00

1657 lines
40 KiB
C

/*
* (C) Copyright 2007
* Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
*
* Copyright 2010-2011 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <inttypes.h>
#include <stdio_dev.h>
#include <linux/ctype.h>
#include <linux/types.h>
#include <asm/global_data.h>
#include <libfdt.h>
#include <fdt_support.h>
#include <exports.h>
#include <fdtdec.h>
/**
* fdt_getprop_u32_default_node - Return a node's property or a default
*
* @fdt: ptr to device tree
* @off: offset of node
* @cell: cell offset in property
* @prop: property name
* @dflt: default value if the property isn't found
*
* Convenience function to return a node's property or a default value if
* the property doesn't exist.
*/
u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
const char *prop, const u32 dflt)
{
const fdt32_t *val;
int len;
val = fdt_getprop(fdt, off, prop, &len);
/* Check if property exists */
if (!val)
return dflt;
/* Check if property is long enough */
if (len < ((cell + 1) * sizeof(uint32_t)))
return dflt;
return fdt32_to_cpu(*val);
}
/**
* fdt_getprop_u32_default - Find a node and return it's property or a default
*
* @fdt: ptr to device tree
* @path: path of node
* @prop: property name
* @dflt: default value if the property isn't found
*
* Convenience function to find a node and return it's property or a
* default value if it doesn't exist.
*/
u32 fdt_getprop_u32_default(const void *fdt, const char *path,
const char *prop, const u32 dflt)
{
int off;
off = fdt_path_offset(fdt, path);
if (off < 0)
return dflt;
return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
}
/**
* fdt_find_and_setprop: Find a node and set it's property
*
* @fdt: ptr to device tree
* @node: path of node
* @prop: property name
* @val: ptr to new value
* @len: length of new property value
* @create: flag to create the property if it doesn't exist
*
* Convenience function to directly set a property given the path to the node.
*/
int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
const void *val, int len, int create)
{
int nodeoff = fdt_path_offset(fdt, node);
if (nodeoff < 0)
return nodeoff;
if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
return 0; /* create flag not set; so exit quietly */
return fdt_setprop(fdt, nodeoff, prop, val, len);
}
/**
* fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
*
* @fdt: pointer to the device tree blob
* @parentoffset: structure block offset of a node
* @name: name of the subnode to locate
*
* fdt_subnode_offset() finds a subnode of the node with a given name.
* If the subnode does not exist, it will be created.
*/
int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name)
{
int offset;
offset = fdt_subnode_offset(fdt, parentoffset, name);
if (offset == -FDT_ERR_NOTFOUND)
offset = fdt_add_subnode(fdt, parentoffset, name);
if (offset < 0)
printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));
return offset;
}
/* rename to CONFIG_OF_STDOUT_PATH ? */
#if defined(OF_STDOUT_PATH)
static int fdt_fixup_stdout(void *fdt, int chosenoff)
{
return fdt_setprop(fdt, chosenoff, "linux,stdout-path",
OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1);
}
#elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
static int fdt_fixup_stdout(void *fdt, int chosenoff)
{
int err;
int aliasoff;
char sername[9] = { 0 };
const void *path;
int len;
char tmp[256]; /* long enough */
sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
aliasoff = fdt_path_offset(fdt, "/aliases");
if (aliasoff < 0) {
err = aliasoff;
goto noalias;
}
path = fdt_getprop(fdt, aliasoff, sername, &len);
if (!path) {
err = len;
goto noalias;
}
/* fdt_setprop may break "path" so we copy it to tmp buffer */
memcpy(tmp, path, len);
err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
if (err < 0)
printf("WARNING: could not set linux,stdout-path %s.\n",
fdt_strerror(err));
return err;
noalias:
printf("WARNING: %s: could not read %s alias: %s\n",
__func__, sername, fdt_strerror(err));
return 0;
}
#else
static int fdt_fixup_stdout(void *fdt, int chosenoff)
{
return 0;
}
#endif
static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
uint64_t val, int is_u64)
{
if (is_u64)
return fdt_setprop_u64(fdt, nodeoffset, name, val);
else
return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
}
int fdt_root(void *fdt)
{
char *serial;
int err;
err = fdt_check_header(fdt);
if (err < 0) {
printf("fdt_root: %s\n", fdt_strerror(err));
return err;
}
serial = getenv("serial#");
if (serial) {
err = fdt_setprop(fdt, 0, "serial-number", serial,
strlen(serial) + 1);
if (err < 0) {
printf("WARNING: could not set serial-number %s.\n",
fdt_strerror(err));
return err;
}
}
return 0;
}
int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
{
int nodeoffset;
int err, j, total;
int is_u64;
uint64_t addr, size;
/* just return if the size of initrd is zero */
if (initrd_start == initrd_end)
return 0;
/* find or create "/chosen" node. */
nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
if (nodeoffset < 0)
return nodeoffset;
total = fdt_num_mem_rsv(fdt);
/*
* Look for an existing entry and update it. If we don't find
* the entry, we will j be the next available slot.
*/
for (j = 0; j < total; j++) {
err = fdt_get_mem_rsv(fdt, j, &addr, &size);
if (addr == initrd_start) {
fdt_del_mem_rsv(fdt, j);
break;
}
}
err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
if (err < 0) {
printf("fdt_initrd: %s\n", fdt_strerror(err));
return err;
}
is_u64 = (fdt_address_cells(fdt, 0) == 2);
err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
(uint64_t)initrd_start, is_u64);
if (err < 0) {
printf("WARNING: could not set linux,initrd-start %s.\n",
fdt_strerror(err));
return err;
}
err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
(uint64_t)initrd_end, is_u64);
if (err < 0) {
printf("WARNING: could not set linux,initrd-end %s.\n",
fdt_strerror(err));
return err;
}
return 0;
}
int fdt_chosen(void *fdt)
{
int nodeoffset;
int err;
char *str; /* used to set string properties */
err = fdt_check_header(fdt);
if (err < 0) {
printf("fdt_chosen: %s\n", fdt_strerror(err));
return err;
}
/* find or create "/chosen" node. */
nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
if (nodeoffset < 0)
return nodeoffset;
str = getenv("bootargs");
if (str) {
err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
strlen(str) + 1);
if (err < 0) {
printf("WARNING: could not set bootargs %s.\n",
fdt_strerror(err));
return err;
}
}
return fdt_fixup_stdout(fdt, nodeoffset);
}
void do_fixup_by_path(void *fdt, const char *path, const char *prop,
const void *val, int len, int create)
{
#if defined(DEBUG)
int i;
debug("Updating property '%s/%s' = ", path, prop);
for (i = 0; i < len; i++)
debug(" %.2x", *(u8*)(val+i));
debug("\n");
#endif
int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
if (rc)
printf("Unable to update property %s:%s, err=%s\n",
path, prop, fdt_strerror(rc));
}
void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
u32 val, int create)
{
fdt32_t tmp = cpu_to_fdt32(val);
do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
}
void do_fixup_by_prop(void *fdt,
const char *pname, const void *pval, int plen,
const char *prop, const void *val, int len,
int create)
{
int off;
#if defined(DEBUG)
int i;
debug("Updating property '%s' = ", prop);
for (i = 0; i < len; i++)
debug(" %.2x", *(u8*)(val+i));
debug("\n");
#endif
off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
while (off != -FDT_ERR_NOTFOUND) {
if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
fdt_setprop(fdt, off, prop, val, len);
off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
}
}
void do_fixup_by_prop_u32(void *fdt,
const char *pname, const void *pval, int plen,
const char *prop, u32 val, int create)
{
fdt32_t tmp = cpu_to_fdt32(val);
do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
}
void do_fixup_by_compat(void *fdt, const char *compat,
const char *prop, const void *val, int len, int create)
{
int off = -1;
#if defined(DEBUG)
int i;
debug("Updating property '%s' = ", prop);
for (i = 0; i < len; i++)
debug(" %.2x", *(u8*)(val+i));
debug("\n");
#endif
off = fdt_node_offset_by_compatible(fdt, -1, compat);
while (off != -FDT_ERR_NOTFOUND) {
if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
fdt_setprop(fdt, off, prop, val, len);
off = fdt_node_offset_by_compatible(fdt, off, compat);
}
}
void do_fixup_by_compat_u32(void *fdt, const char *compat,
const char *prop, u32 val, int create)
{
fdt32_t tmp = cpu_to_fdt32(val);
do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
}
#ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
/*
* fdt_pack_reg - pack address and size array into the "reg"-suitable stream
*/
static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
int n)
{
int i;
int address_cells = fdt_address_cells(fdt, 0);
int size_cells = fdt_size_cells(fdt, 0);
char *p = buf;
for (i = 0; i < n; i++) {
if (address_cells == 2)
*(fdt64_t *)p = cpu_to_fdt64(address[i]);
else
*(fdt32_t *)p = cpu_to_fdt32(address[i]);
p += 4 * address_cells;
if (size_cells == 2)
*(fdt64_t *)p = cpu_to_fdt64(size[i]);
else
*(fdt32_t *)p = cpu_to_fdt32(size[i]);
p += 4 * size_cells;
}
return p - (char *)buf;
}
#ifdef CONFIG_NR_DRAM_BANKS
#define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
#else
#define MEMORY_BANKS_MAX 4
#endif
int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
{
int err, nodeoffset;
int len;
u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
if (banks > MEMORY_BANKS_MAX) {
printf("%s: num banks %d exceeds hardcoded limit %d."
" Recompile with higher MEMORY_BANKS_MAX?\n",
__FUNCTION__, banks, MEMORY_BANKS_MAX);
return -1;
}
err = fdt_check_header(blob);
if (err < 0) {
printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
return err;
}
/* find or create "/memory" node. */
nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
if (nodeoffset < 0)
return nodeoffset;
err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
sizeof("memory"));
if (err < 0) {
printf("WARNING: could not set %s %s.\n", "device_type",
fdt_strerror(err));
return err;
}
if (!banks)
return 0;
len = fdt_pack_reg(blob, tmp, start, size, banks);
err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
if (err < 0) {
printf("WARNING: could not set %s %s.\n",
"reg", fdt_strerror(err));
return err;
}
return 0;
}
#endif
int fdt_fixup_memory(void *blob, u64 start, u64 size)
{
return fdt_fixup_memory_banks(blob, &start, &size, 1);
}
void fdt_fixup_ethernet(void *fdt)
{
int i, j, prop;
char *tmp, *end;
char mac[16];
const char *path;
unsigned char mac_addr[ARP_HLEN];
int offset;
if (fdt_path_offset(fdt, "/aliases") < 0)
return;
/* Cycle through all aliases */
for (prop = 0; ; prop++) {
const char *name;
/* FDT might have been edited, recompute the offset */
offset = fdt_first_property_offset(fdt,
fdt_path_offset(fdt, "/aliases"));
/* Select property number 'prop' */
for (i = 0; i < prop; i++)
offset = fdt_next_property_offset(fdt, offset);
if (offset < 0)
break;
path = fdt_getprop_by_offset(fdt, offset, &name, NULL);
if (!strncmp(name, "ethernet", 8)) {
/* Treat plain "ethernet" same as "ethernet0". */
if (!strcmp(name, "ethernet"))
i = 0;
else
i = trailing_strtol(name);
if (i != -1) {
if (i == 0)
strcpy(mac, "ethaddr");
else
sprintf(mac, "eth%daddr", i);
} else {
continue;
}
tmp = getenv(mac);
if (!tmp)
continue;
for (j = 0; j < 6; j++) {
mac_addr[j] = tmp ?
simple_strtoul(tmp, &end, 16) : 0;
if (tmp)
tmp = (*end) ? end + 1 : end;
}
do_fixup_by_path(fdt, path, "mac-address",
&mac_addr, 6, 0);
do_fixup_by_path(fdt, path, "local-mac-address",
&mac_addr, 6, 1);
}
}
}
/* Resize the fdt to its actual size + a bit of padding */
int fdt_shrink_to_minimum(void *blob, uint extrasize)
{
int i;
uint64_t addr, size;
int total, ret;
uint actualsize;
if (!blob)
return 0;
total = fdt_num_mem_rsv(blob);
for (i = 0; i < total; i++) {
fdt_get_mem_rsv(blob, i, &addr, &size);
if (addr == (uintptr_t)blob) {
fdt_del_mem_rsv(blob, i);
break;
}
}
/*
* Calculate the actual size of the fdt
* plus the size needed for 5 fdt_add_mem_rsv, one
* for the fdt itself and 4 for a possible initrd
* ((initrd-start + initrd-end) * 2 (name & value))
*/
actualsize = fdt_off_dt_strings(blob) +
fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
actualsize += extrasize;
/* Make it so the fdt ends on a page boundary */
actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
actualsize = actualsize - ((uintptr_t)blob & 0xfff);
/* Change the fdt header to reflect the correct size */
fdt_set_totalsize(blob, actualsize);
/* Add the new reservation */
ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
if (ret < 0)
return ret;
return actualsize;
}
#ifdef CONFIG_PCI
#define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
#define FDT_PCI_PREFETCH (0x40000000)
#define FDT_PCI_MEM32 (0x02000000)
#define FDT_PCI_IO (0x01000000)
#define FDT_PCI_MEM64 (0x03000000)
int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
int addrcell, sizecell, len, r;
u32 *dma_range;
/* sized based on pci addr cells, size-cells, & address-cells */
u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
dma_range = &dma_ranges[0];
for (r = 0; r < hose->region_count; r++) {
u64 bus_start, phys_start, size;
/* skip if !PCI_REGION_SYS_MEMORY */
if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
continue;
bus_start = (u64)hose->regions[r].bus_start;
phys_start = (u64)hose->regions[r].phys_start;
size = (u64)hose->regions[r].size;
dma_range[0] = 0;
if (size >= 0x100000000ull)
dma_range[0] |= FDT_PCI_MEM64;
else
dma_range[0] |= FDT_PCI_MEM32;
if (hose->regions[r].flags & PCI_REGION_PREFETCH)
dma_range[0] |= FDT_PCI_PREFETCH;
#ifdef CONFIG_SYS_PCI_64BIT
dma_range[1] = bus_start >> 32;
#else
dma_range[1] = 0;
#endif
dma_range[2] = bus_start & 0xffffffff;
if (addrcell == 2) {
dma_range[3] = phys_start >> 32;
dma_range[4] = phys_start & 0xffffffff;
} else {
dma_range[3] = phys_start & 0xffffffff;
}
if (sizecell == 2) {
dma_range[3 + addrcell + 0] = size >> 32;
dma_range[3 + addrcell + 1] = size & 0xffffffff;
} else {
dma_range[3 + addrcell + 0] = size & 0xffffffff;
}
dma_range += (3 + addrcell + sizecell);
}
len = dma_range - &dma_ranges[0];
if (len)
fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
return 0;
}
#endif
int fdt_increase_size(void *fdt, int add_len)
{
int newlen;
newlen = fdt_totalsize(fdt) + add_len;
/* Open in place with a new len */
return fdt_open_into(fdt, fdt, newlen);
}
#ifdef CONFIG_FDT_FIXUP_PARTITIONS
#include <jffs2/load_kernel.h>
#include <mtd_node.h>
struct reg_cell {
unsigned int r0;
unsigned int r1;
};
int fdt_del_subnodes(const void *blob, int parent_offset)
{
int off, ndepth;
int ret;
for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
(off >= 0) && (ndepth > 0);
off = fdt_next_node(blob, off, &ndepth)) {
if (ndepth == 1) {
debug("delete %s: offset: %x\n",
fdt_get_name(blob, off, 0), off);
ret = fdt_del_node((void *)blob, off);
if (ret < 0) {
printf("Can't delete node: %s\n",
fdt_strerror(ret));
return ret;
} else {
ndepth = 0;
off = parent_offset;
}
}
}
return 0;
}
int fdt_del_partitions(void *blob, int parent_offset)
{
const void *prop;
int ndepth = 0;
int off;
int ret;
off = fdt_next_node(blob, parent_offset, &ndepth);
if (off > 0 && ndepth == 1) {
prop = fdt_getprop(blob, off, "label", NULL);
if (prop == NULL) {
/*
* Could not find label property, nand {}; node?
* Check subnode, delete partitions there if any.
*/
return fdt_del_partitions(blob, off);
} else {
ret = fdt_del_subnodes(blob, parent_offset);
if (ret < 0) {
printf("Can't remove subnodes: %s\n",
fdt_strerror(ret));
return ret;
}
}
}
return 0;
}
int fdt_node_set_part_info(void *blob, int parent_offset,
struct mtd_device *dev)
{
struct list_head *pentry;
struct part_info *part;
struct reg_cell cell;
int off, ndepth = 0;
int part_num, ret;
char buf[64];
ret = fdt_del_partitions(blob, parent_offset);
if (ret < 0)
return ret;
/*
* Check if it is nand {}; subnode, adjust
* the offset in this case
*/
off = fdt_next_node(blob, parent_offset, &ndepth);
if (off > 0 && ndepth == 1)
parent_offset = off;
part_num = 0;
list_for_each_prev(pentry, &dev->parts) {
int newoff;
part = list_entry(pentry, struct part_info, link);
debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
part_num, part->name, part->size,
part->offset, part->mask_flags);
sprintf(buf, "partition@%llx", part->offset);
add_sub:
ret = fdt_add_subnode(blob, parent_offset, buf);
if (ret == -FDT_ERR_NOSPACE) {
ret = fdt_increase_size(blob, 512);
if (!ret)
goto add_sub;
else
goto err_size;
} else if (ret < 0) {
printf("Can't add partition node: %s\n",
fdt_strerror(ret));
return ret;
}
newoff = ret;
/* Check MTD_WRITEABLE_CMD flag */
if (part->mask_flags & 1) {
add_ro:
ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
if (ret == -FDT_ERR_NOSPACE) {
ret = fdt_increase_size(blob, 512);
if (!ret)
goto add_ro;
else
goto err_size;
} else if (ret < 0)
goto err_prop;
}
cell.r0 = cpu_to_fdt32(part->offset);
cell.r1 = cpu_to_fdt32(part->size);
add_reg:
ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
if (ret == -FDT_ERR_NOSPACE) {
ret = fdt_increase_size(blob, 512);
if (!ret)
goto add_reg;
else
goto err_size;
} else if (ret < 0)
goto err_prop;
add_label:
ret = fdt_setprop_string(blob, newoff, "label", part->name);
if (ret == -FDT_ERR_NOSPACE) {
ret = fdt_increase_size(blob, 512);
if (!ret)
goto add_label;
else
goto err_size;
} else if (ret < 0)
goto err_prop;
part_num++;
}
return 0;
err_size:
printf("Can't increase blob size: %s\n", fdt_strerror(ret));
return ret;
err_prop:
printf("Can't add property: %s\n", fdt_strerror(ret));
return ret;
}
/*
* Update partitions in nor/nand nodes using info from
* mtdparts environment variable. The nodes to update are
* specified by node_info structure which contains mtd device
* type and compatible string: E. g. the board code in
* ft_board_setup() could use:
*
* struct node_info nodes[] = {
* { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
* { "cfi-flash", MTD_DEV_TYPE_NOR, },
* };
*
* fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
*/
void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
{
struct node_info *ni = node_info;
struct mtd_device *dev;
int i, idx;
int noff;
if (mtdparts_init() != 0)
return;
for (i = 0; i < node_info_size; i++) {
idx = 0;
noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
while (noff != -FDT_ERR_NOTFOUND) {
debug("%s: %s, mtd dev type %d\n",
fdt_get_name(blob, noff, 0),
ni[i].compat, ni[i].type);
dev = device_find(ni[i].type, idx++);
if (dev) {
if (fdt_node_set_part_info(blob, noff, dev))
return; /* return on error */
}
/* Jump to next flash node */
noff = fdt_node_offset_by_compatible(blob, noff,
ni[i].compat);
}
}
}
#endif
void fdt_del_node_and_alias(void *blob, const char *alias)
{
int off = fdt_path_offset(blob, alias);
if (off < 0)
return;
fdt_del_node(blob, off);
off = fdt_path_offset(blob, "/aliases");
fdt_delprop(blob, off, alias);
}
/* Max address size we deal with */
#define OF_MAX_ADDR_CELLS 4
#define OF_BAD_ADDR FDT_ADDR_T_NONE
#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
(ns) > 0)
/* Debug utility */
#ifdef DEBUG
static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
{
printf("%s", s);
while(na--)
printf(" %08x", *(addr++));
printf("\n");
}
#else
static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
#endif
/**
* struct of_bus - Callbacks for bus specific translators
* @name: A string used to identify this bus in debug output.
* @addresses: The name of the DT property from which addresses are
* to be read, typically "reg".
* @match: Return non-zero if the node whose parent is at
* parentoffset in the FDT blob corresponds to a bus
* of this type, otherwise return zero. If NULL a match
* is assumed.
* @count_cells:Count how many cells (be32 values) a node whose parent
* is at parentoffset in the FDT blob will require to
* represent its address (written to *addrc) & size
* (written to *sizec).
* @map: Map the address addr from the address space of this
* bus to that of its parent, making use of the ranges
* read from DT to an array at range. na and ns are the
* number of cells (be32 values) used to hold and address
* or size, respectively, for this bus. pna is the number
* of cells used to hold an address for the parent bus.
* Returns the address in the address space of the parent
* bus.
* @translate: Update the value of the address cells at addr within an
* FDT by adding offset to it. na specifies the number of
* cells used to hold the address being translated. Returns
* zero on success, non-zero on error.
*
* Each bus type will include a struct of_bus in the of_busses array,
* providing implementations of some or all of the functions used to
* match the bus & handle address translation for its children.
*/
struct of_bus {
const char *name;
const char *addresses;
int (*match)(const void *blob, int parentoffset);
void (*count_cells)(const void *blob, int parentoffset,
int *addrc, int *sizec);
u64 (*map)(fdt32_t *addr, const fdt32_t *range,
int na, int ns, int pna);
int (*translate)(fdt32_t *addr, u64 offset, int na);
};
/* Default translator (generic bus) */
void fdt_support_default_count_cells(const void *blob, int parentoffset,
int *addrc, int *sizec)
{
const fdt32_t *prop;
if (addrc)
*addrc = fdt_address_cells(blob, parentoffset);
if (sizec) {
prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
if (prop)
*sizec = be32_to_cpup(prop);
else
*sizec = 1;
}
}
static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
int na, int ns, int pna)
{
u64 cp, s, da;
cp = fdt_read_number(range, na);
s = fdt_read_number(range + na + pna, ns);
da = fdt_read_number(addr, na);
debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64
", da=%" PRIu64 "\n", cp, s, da);
if (da < cp || da >= (cp + s))
return OF_BAD_ADDR;
return da - cp;
}
static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
{
u64 a = fdt_read_number(addr, na);
memset(addr, 0, na * 4);
a += offset;
if (na > 1)
addr[na - 2] = cpu_to_fdt32(a >> 32);
addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
return 0;
}
#ifdef CONFIG_OF_ISA_BUS
/* ISA bus translator */
static int of_bus_isa_match(const void *blob, int parentoffset)
{
const char *name;
name = fdt_get_name(blob, parentoffset, NULL);
if (!name)
return 0;
return !strcmp(name, "isa");
}
static void of_bus_isa_count_cells(const void *blob, int parentoffset,
int *addrc, int *sizec)
{
if (addrc)
*addrc = 2;
if (sizec)
*sizec = 1;
}
static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range,
int na, int ns, int pna)
{
u64 cp, s, da;
/* Check address type match */
if ((addr[0] ^ range[0]) & cpu_to_be32(1))
return OF_BAD_ADDR;
cp = fdt_read_number(range + 1, na - 1);
s = fdt_read_number(range + na + pna, ns);
da = fdt_read_number(addr + 1, na - 1);
debug("OF: ISA map, cp=%" PRIu64 ", s=%" PRIu64
", da=%" PRIu64 "\n", cp, s, da);
if (da < cp || da >= (cp + s))
return OF_BAD_ADDR;
return da - cp;
}
static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na)
{
return of_bus_default_translate(addr + 1, offset, na - 1);
}
#endif /* CONFIG_OF_ISA_BUS */
/* Array of bus specific translators */
static struct of_bus of_busses[] = {
#ifdef CONFIG_OF_ISA_BUS
/* 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,
},
#endif /* CONFIG_OF_ISA_BUS */
/* Default */
{
.name = "default",
.addresses = "reg",
.count_cells = fdt_support_default_count_cells,
.map = of_bus_default_map,
.translate = of_bus_default_translate,
},
};
static struct of_bus *of_match_bus(const void *blob, int parentoffset)
{
struct of_bus *bus;
if (ARRAY_SIZE(of_busses) == 1)
return of_busses;
for (bus = of_busses; bus; bus++) {
if (!bus->match || bus->match(blob, parentoffset))
return bus;
}
/*
* We should always have matched the default bus at least, since
* it has a NULL match field. If we didn't then it somehow isn't
* in the of_busses array or something equally catastrophic has
* gone wrong.
*/
assert(0);
return NULL;
}
static int of_translate_one(const void *blob, int parent, struct of_bus *bus,
struct of_bus *pbus, fdt32_t *addr,
int na, int ns, int pna, const char *rprop)
{
const fdt32_t *ranges;
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 = fdt_getprop(blob, parent, rprop, &rlen);
if (ranges == NULL || rlen == 0) {
offset = fdt_read_number(addr, na);
memset(addr, 0, pna * 4);
debug("OF: no ranges, 1:1 translation\n");
goto finish;
}
debug("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) {
debug("OF: not found !\n");
return 1;
}
memcpy(addr, ranges + na, 4 * pna);
finish:
of_dump_addr("OF: parent translation for:", addr, pna);
debug("OF: with offset: %" PRIu64 "\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
*/
static u64 __of_translate_address(const void *blob, int node_offset,
const fdt32_t *in_addr, const char *rprop)
{
int parent;
struct of_bus *bus, *pbus;
fdt32_t addr[OF_MAX_ADDR_CELLS];
int na, ns, pna, pns;
u64 result = OF_BAD_ADDR;
debug("OF: ** translation for device %s **\n",
fdt_get_name(blob, node_offset, NULL));
/* Get parent & match bus type */
parent = fdt_parent_offset(blob, node_offset);
if (parent < 0)
goto bail;
bus = of_match_bus(blob, parent);
/* Cound address cells & copy address locally */
bus->count_cells(blob, parent, &na, &ns);
if (!OF_CHECK_COUNTS(na, ns)) {
printf("%s: Bad cell count for %s\n", __FUNCTION__,
fdt_get_name(blob, node_offset, NULL));
goto bail;
}
memcpy(addr, in_addr, na * 4);
debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
bus->name, 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) {
debug("OF: reached root node\n");
result = fdt_read_number(addr, na);
break;
}
/* Get new parent bus and counts */
pbus = of_match_bus(blob, parent);
pbus->count_cells(blob, parent, &pna, &pns);
if (!OF_CHECK_COUNTS(pna, pns)) {
printf("%s: Bad cell count for %s\n", __FUNCTION__,
fdt_get_name(blob, node_offset, NULL));
break;
}
debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
/* Apply bus translation */
if (of_translate_one(blob, node_offset, bus, pbus,
addr, na, ns, pna, rprop))
break;
/* Complete the move up one level */
na = pna;
ns = pns;
bus = pbus;
of_dump_addr("OF: one level translation:", addr, na);
}
bail:
return result;
}
u64 fdt_translate_address(const void *blob, int node_offset,
const fdt32_t *in_addr)
{
return __of_translate_address(blob, node_offset, in_addr, "ranges");
}
/**
* fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
* who's reg property matches a physical cpu address
*
* @blob: ptr to device tree
* @compat: compatiable string to match
* @compat_off: property name
*
*/
int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
phys_addr_t compat_off)
{
int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
while (off != -FDT_ERR_NOTFOUND) {
const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
if (reg) {
if (compat_off == fdt_translate_address(blob, off, reg))
return off;
}
off = fdt_node_offset_by_compatible(blob, off, compat);
}
return -FDT_ERR_NOTFOUND;
}
/**
* fdt_alloc_phandle: Return next free phandle value
*
* @blob: ptr to device tree
*/
int fdt_alloc_phandle(void *blob)
{
int offset;
uint32_t phandle = 0;
for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
offset = fdt_next_node(blob, offset, NULL)) {
phandle = max(phandle, fdt_get_phandle(blob, offset));
}
return phandle + 1;
}
/*
* fdt_set_phandle: Create a phandle property for the given node
*
* @fdt: ptr to device tree
* @nodeoffset: node to update
* @phandle: phandle value to set (must be unique)
*/
int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
{
int ret;
#ifdef DEBUG
int off = fdt_node_offset_by_phandle(fdt, phandle);
if ((off >= 0) && (off != nodeoffset)) {
char buf[64];
fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
printf("Trying to update node %s with phandle %u ",
buf, phandle);
fdt_get_path(fdt, off, buf, sizeof(buf));
printf("that already exists in node %s.\n", buf);
return -FDT_ERR_BADPHANDLE;
}
#endif
ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
if (ret < 0)
return ret;
/*
* For now, also set the deprecated "linux,phandle" property, so that we
* don't break older kernels.
*/
ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
return ret;
}
/*
* fdt_create_phandle: Create a phandle property for the given node
*
* @fdt: ptr to device tree
* @nodeoffset: node to update
*/
unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
{
/* see if there is a phandle already */
int phandle = fdt_get_phandle(fdt, nodeoffset);
/* if we got 0, means no phandle so create one */
if (phandle == 0) {
int ret;
phandle = fdt_alloc_phandle(fdt);
ret = fdt_set_phandle(fdt, nodeoffset, phandle);
if (ret < 0) {
printf("Can't set phandle %u: %s\n", phandle,
fdt_strerror(ret));
return 0;
}
}
return phandle;
}
/*
* fdt_set_node_status: Set status for the given node
*
* @fdt: ptr to device tree
* @nodeoffset: node to update
* @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
* FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
* @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
*/
int fdt_set_node_status(void *fdt, int nodeoffset,
enum fdt_status status, unsigned int error_code)
{
char buf[16];
int ret = 0;
if (nodeoffset < 0)
return nodeoffset;
switch (status) {
case FDT_STATUS_OKAY:
ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
break;
case FDT_STATUS_DISABLED:
ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
break;
case FDT_STATUS_FAIL:
ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
break;
case FDT_STATUS_FAIL_ERROR_CODE:
sprintf(buf, "fail-%d", error_code);
ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
break;
default:
printf("Invalid fdt status: %x\n", status);
ret = -1;
break;
}
return ret;
}
/*
* fdt_set_status_by_alias: Set status for the given node given an alias
*
* @fdt: ptr to device tree
* @alias: alias of node to update
* @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
* FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
* @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
*/
int fdt_set_status_by_alias(void *fdt, const char* alias,
enum fdt_status status, unsigned int error_code)
{
int offset = fdt_path_offset(fdt, alias);
return fdt_set_node_status(fdt, offset, status, error_code);
}
#if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
{
int noff;
int ret;
noff = fdt_node_offset_by_compatible(blob, -1, compat);
if (noff != -FDT_ERR_NOTFOUND) {
debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
add_edid:
ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
if (ret == -FDT_ERR_NOSPACE) {
ret = fdt_increase_size(blob, 512);
if (!ret)
goto add_edid;
else
goto err_size;
} else if (ret < 0) {
printf("Can't add property: %s\n", fdt_strerror(ret));
return ret;
}
}
return 0;
err_size:
printf("Can't increase blob size: %s\n", fdt_strerror(ret));
return ret;
}
#endif
/*
* Verify the physical address of device tree node for a given alias
*
* This function locates the device tree node of a given alias, and then
* verifies that the physical address of that device matches the given
* parameter. It displays a message if there is a mismatch.
*
* Returns 1 on success, 0 on failure
*/
int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
{
const char *path;
const fdt32_t *reg;
int node, len;
u64 dt_addr;
path = fdt_getprop(fdt, anode, alias, NULL);
if (!path) {
/* If there's no such alias, then it's not a failure */
return 1;
}
node = fdt_path_offset(fdt, path);
if (node < 0) {
printf("Warning: device tree alias '%s' points to invalid "
"node %s.\n", alias, path);
return 0;
}
reg = fdt_getprop(fdt, node, "reg", &len);
if (!reg) {
printf("Warning: device tree node '%s' has no address.\n",
path);
return 0;
}
dt_addr = fdt_translate_address(fdt, node, reg);
if (addr != dt_addr) {
printf("Warning: U-Boot configured device %s at address %"
PRIx64 ",\n but the device tree has it address %"
PRIx64 ".\n", alias, addr, dt_addr);
return 0;
}
return 1;
}
/*
* Returns the base address of an SOC or PCI node
*/
u64 fdt_get_base_address(const void *fdt, int node)
{
int size;
const fdt32_t *prop;
prop = fdt_getprop(fdt, node, "reg", &size);
return prop ? fdt_translate_address(fdt, node, prop) : 0;
}
/*
* Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
*/
static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
uint64_t *val, int cells)
{
const fdt32_t *prop32 = &prop[cell_off];
const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
if ((cell_off + cells) > prop_len)
return -FDT_ERR_NOSPACE;
switch (cells) {
case 1:
*val = fdt32_to_cpu(*prop32);
break;
case 2:
*val = fdt64_to_cpu(*prop64);
break;
default:
return -FDT_ERR_NOSPACE;
}
return 0;
}
/**
* fdt_read_range - Read a node's n'th range property
*
* @fdt: ptr to device tree
* @node: offset of node
* @n: range index
* @child_addr: pointer to storage for the "child address" field
* @addr: pointer to storage for the CPU view translated physical start
* @len: pointer to storage for the range length
*
* Convenience function that reads and interprets a specific range out of
* a number of the "ranges" property array.
*/
int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
uint64_t *addr, uint64_t *len)
{
int pnode = fdt_parent_offset(fdt, node);
const fdt32_t *ranges;
int pacells;
int acells;
int scells;
int ranges_len;
int cell = 0;
int r = 0;
/*
* The "ranges" property is an array of
* { <child address> <parent address> <size in child address space> }
*
* All 3 elements can span a diffent number of cells. Fetch their size.
*/
pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
/* Now try to get the ranges property */
ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
if (!ranges)
return -FDT_ERR_NOTFOUND;
ranges_len /= sizeof(uint32_t);
/* Jump to the n'th entry */
cell = n * (pacells + acells + scells);
/* Read <child address> */
if (child_addr) {
r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
acells);
if (r)
return r;
}
cell += acells;
/* Read <parent address> */
if (addr)
*addr = fdt_translate_address(fdt, node, ranges + cell);
cell += pacells;
/* Read <size in child address space> */
if (len) {
r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
if (r)
return r;
}
return 0;
}
/**
* fdt_setup_simplefb_node - Fill and enable a simplefb node
*
* @fdt: ptr to device tree
* @node: offset of the simplefb node
* @base_address: framebuffer base address
* @width: width in pixels
* @height: height in pixels
* @stride: bytes per line
* @format: pixel format string
*
* Convenience function to fill and enable a simplefb node.
*/
int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
u32 height, u32 stride, const char *format)
{
char name[32];
fdt32_t cells[4];
int i, addrc, sizec, ret;
fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node),
&addrc, &sizec);
i = 0;
if (addrc == 2)
cells[i++] = cpu_to_fdt32(base_address >> 32);
cells[i++] = cpu_to_fdt32(base_address);
if (sizec == 2)
cells[i++] = 0;
cells[i++] = cpu_to_fdt32(height * stride);
ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
if (ret < 0)
return ret;
snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address);
ret = fdt_set_name(fdt, node, name);
if (ret < 0)
return ret;
ret = fdt_setprop_u32(fdt, node, "width", width);
if (ret < 0)
return ret;
ret = fdt_setprop_u32(fdt, node, "height", height);
if (ret < 0)
return ret;
ret = fdt_setprop_u32(fdt, node, "stride", stride);
if (ret < 0)
return ret;
ret = fdt_setprop_string(fdt, node, "format", format);
if (ret < 0)
return ret;
ret = fdt_setprop_string(fdt, node, "status", "okay");
if (ret < 0)
return ret;
return 0;
}
/*
* Update native-mode in display-timings from display environment variable.
* The node to update are specified by path.
*/
int fdt_fixup_display(void *blob, const char *path, const char *display)
{
int off, toff;
if (!display || !path)
return -FDT_ERR_NOTFOUND;
toff = fdt_path_offset(blob, path);
if (toff >= 0)
toff = fdt_subnode_offset(blob, toff, "display-timings");
if (toff < 0)
return toff;
for (off = fdt_first_subnode(blob, toff);
off >= 0;
off = fdt_next_subnode(blob, off)) {
uint32_t h = fdt_get_phandle(blob, off);
debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
fdt32_to_cpu(h));
if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
return fdt_setprop_u32(blob, toff, "native-mode", h);
}
return toff;
}