u-boot/common/fdt_support.c
Stephen Warren 064d55f8bc fdt: remove unaligned access in fdt_fixup_ethernet()
Some ARM compilers may emit code that makes unaligned accesses when
faced with constructs such as:

char mac[16] = "ethaddr";

Replace this with a strcpy() call instead to avoid this. strcpy() is
used here, rather than replacing all usage of the mac variable with the
string itself, since the loop itself sprintf()s to the variable each
iteration, so strcpy() is doing basically the same thing.

Reported-by: Florian Meier
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
2013-06-07 14:17:01 -04:00

1424 lines
34 KiB
C

/*
* (C) Copyright 2007
* Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
*
* Copyright 2010-2011 Freescale Semiconductor, Inc.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.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>
/*
* Global data (for the gd->bd)
*/
DECLARE_GLOBAL_DATA_PTR;
/**
* 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)
{
const fdt32_t *val;
int off;
off = fdt_path_offset(fdt, path);
if (off < 0)
return dflt;
val = fdt_getprop(fdt, off, prop, NULL);
if (val)
return fdt32_to_cpu(*val);
else
return 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);
}
#ifdef CONFIG_OF_STDOUT_VIA_ALIAS
#ifdef CONFIG_CONS_INDEX
static void fdt_fill_multisername(char *sername, size_t maxlen)
{
const char *outname = stdio_devices[stdout]->name;
if (strcmp(outname, "serial") > 0)
strncpy(sername, outname, maxlen);
/* eserial? */
if (strcmp(outname + 1, "serial") > 0)
strncpy(sername, outname + 1, maxlen);
}
#endif
static int fdt_fixup_stdout(void *fdt, int chosenoff)
{
int err = 0;
#ifdef CONFIG_CONS_INDEX
int node;
char sername[9] = { 0 };
const char *path;
fdt_fill_multisername(sername, sizeof(sername) - 1);
if (!sername[0])
sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
err = node = fdt_path_offset(fdt, "/aliases");
if (node >= 0) {
int len;
path = fdt_getprop(fdt, node, sername, &len);
if (path) {
char *p = malloc(len);
err = -FDT_ERR_NOSPACE;
if (p) {
memcpy(p, path, len);
err = fdt_setprop(fdt, chosenoff,
"linux,stdout-path", p, len);
free(p);
}
} else {
err = len;
}
}
#endif
if (err < 0)
printf("WARNING: could not set linux,stdout-path %s.\n",
fdt_strerror(err));
return err;
}
#endif
int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force)
{
int nodeoffset;
int err, j, total;
fdt32_t tmp;
const char *path;
uint64_t addr, size;
/* Find the "chosen" node. */
nodeoffset = fdt_path_offset (fdt, "/chosen");
/* If there is no "chosen" node in the blob return */
if (nodeoffset < 0) {
printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset));
return nodeoffset;
}
/* just return if initrd_start/end aren't valid */
if ((initrd_start == 0) || (initrd_end == 0))
return 0;
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;
}
path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL);
if ((path == NULL) || force) {
tmp = cpu_to_fdt32(initrd_start);
err = fdt_setprop(fdt, nodeoffset,
"linux,initrd-start", &tmp, sizeof(tmp));
if (err < 0) {
printf("WARNING: "
"could not set linux,initrd-start %s.\n",
fdt_strerror(err));
return err;
}
tmp = cpu_to_fdt32(initrd_end);
err = fdt_setprop(fdt, nodeoffset,
"linux,initrd-end", &tmp, sizeof(tmp));
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 force)
{
int nodeoffset;
int err;
char *str; /* used to set string properties */
const char *path;
err = fdt_check_header(fdt);
if (err < 0) {
printf("fdt_chosen: %s\n", fdt_strerror(err));
return err;
}
/*
* Find the "chosen" node.
*/
nodeoffset = fdt_path_offset (fdt, "/chosen");
/*
* If there is no "chosen" node in the blob, create it.
*/
if (nodeoffset < 0) {
/*
* Create a new node "/chosen" (offset 0 is root level)
*/
nodeoffset = fdt_add_subnode(fdt, 0, "chosen");
if (nodeoffset < 0) {
printf("WARNING: could not create /chosen %s.\n",
fdt_strerror(nodeoffset));
return nodeoffset;
}
}
/*
* Create /chosen properites that don't exist in the fdt.
* If the property exists, update it only if the "force" parameter
* is true.
*/
str = getenv("bootargs");
if (str != NULL) {
path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL);
if ((path == NULL) || force) {
err = fdt_setprop(fdt, nodeoffset,
"bootargs", str, strlen(str)+1);
if (err < 0)
printf("WARNING: could not set bootargs %s.\n",
fdt_strerror(err));
}
}
#ifdef CONFIG_OF_STDOUT_VIA_ALIAS
path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
if ((path == NULL) || force)
err = fdt_fixup_stdout(fdt, nodeoffset);
#endif
#ifdef OF_STDOUT_PATH
path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
if ((path == NULL) || force) {
err = fdt_setprop(fdt, nodeoffset,
"linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1);
if (err < 0)
printf("WARNING: could not set linux,stdout-path %s.\n",
fdt_strerror(err));
}
#endif
return err;
}
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);
}
/*
* Get cells len in bytes
* if #NNNN-cells property is 2 then len is 8
* otherwise len is 4
*/
static int get_cells_len(void *blob, char *nr_cells_name)
{
const fdt32_t *cell;
cell = fdt_getprop(blob, 0, nr_cells_name, NULL);
if (cell && fdt32_to_cpu(*cell) == 2)
return 8;
return 4;
}
/*
* Write a 4 or 8 byte big endian cell
*/
static void write_cell(u8 *addr, u64 val, int size)
{
int shift = (size - 1) * 8;
while (size-- > 0) {
*addr++ = (val >> shift) & 0xff;
shift -= 8;
}
}
#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 addr_cell_len, size_cell_len, len;
u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
int bank;
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;
}
/* update, or add and update /memory node */
nodeoffset = fdt_path_offset(blob, "/memory");
if (nodeoffset < 0) {
nodeoffset = fdt_add_subnode(blob, 0, "memory");
if (nodeoffset < 0)
printf("WARNING: could not create /memory: %s.\n",
fdt_strerror(nodeoffset));
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;
}
addr_cell_len = get_cells_len(blob, "#address-cells");
size_cell_len = get_cells_len(blob, "#size-cells");
for (bank = 0, len = 0; bank < banks; bank++) {
write_cell(tmp + len, start[bank], addr_cell_len);
len += addr_cell_len;
write_cell(tmp + len, size[bank], size_cell_len);
len += size_cell_len;
}
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;
}
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 node, i, j;
char enet[16], *tmp, *end;
char mac[16];
const char *path;
unsigned char mac_addr[6];
node = fdt_path_offset(fdt, "/aliases");
if (node < 0)
return;
i = 0;
strcpy(mac, "ethaddr");
while ((tmp = getenv(mac)) != NULL) {
sprintf(enet, "ethernet%d", i);
path = fdt_getprop(fdt, node, enet, NULL);
if (!path) {
debug("No alias for %s\n", enet);
sprintf(mac, "eth%daddr", ++i);
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);
sprintf(mac, "eth%daddr", ++i);
}
}
/* Resize the fdt to its actual size + a bit of padding */
int fdt_resize(void *blob)
{
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);
/* 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
#ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
/*
* Provide a weak default function to return the flash bank size.
* There might be multiple non-identical flash chips connected to one
* chip-select, so we need to pass an index as well.
*/
u32 __flash_get_bank_size(int cs, int idx)
{
extern flash_info_t flash_info[];
/*
* As default, a simple 1:1 mapping is provided. Boards with
* a different mapping need to supply a board specific mapping
* routine.
*/
return flash_info[cs].size;
}
u32 flash_get_bank_size(int cs, int idx)
__attribute__((weak, alias("__flash_get_bank_size")));
/*
* This function can be used to update the size in the "reg" property
* of all NOR FLASH device nodes. This is necessary for boards with
* non-fixed NOR FLASH sizes.
*/
int fdt_fixup_nor_flash_size(void *blob)
{
char compat[][16] = { "cfi-flash", "jedec-flash" };
int off;
int len;
struct fdt_property *prop;
u32 *reg, *reg2;
int i;
for (i = 0; i < 2; i++) {
off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
while (off != -FDT_ERR_NOTFOUND) {
int idx;
/*
* Found one compatible node, so fixup the size
* int its reg properties
*/
prop = fdt_get_property_w(blob, off, "reg", &len);
if (prop) {
int tuple_size = 3 * sizeof(reg);
/*
* There might be multiple reg-tuples,
* so loop through them all
*/
reg = reg2 = (u32 *)&prop->data[0];
for (idx = 0; idx < (len / tuple_size); idx++) {
/*
* Update size in reg property
*/
reg[2] = flash_get_bank_size(reg[0],
idx);
/*
* Point to next reg tuple
*/
reg += 3;
}
fdt_setprop(blob, off, "reg", reg2, len);
}
/* Move to next compatible node */
off = fdt_node_offset_by_compatible(blob, off,
compat[i]);
}
}
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%08x\t0x%08x\t%d\n",
part_num, part->name, part->size,
part->offset, part->mask_flags);
sprintf(buf, "partition@%x", 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;
char *parts;
int i, idx;
int noff;
parts = getenv("mtdparts");
if (!parts)
return;
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);
}
/* Helper to read a big number; size is in cells (not bytes) */
static inline u64 of_read_number(const fdt32_t *cell, int size)
{
u64 r = 0;
while (size--)
r = (r << 32) | fdt32_to_cpu(*(cell++));
return r;
}
#define PRu64 "%llx"
/* Max address size we deal with */
#define OF_MAX_ADDR_CELLS 4
#define OF_BAD_ADDR ((u64)-1)
#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
/* Callbacks for bus specific translators */
struct of_bus {
const char *name;
const char *addresses;
void (*count_cells)(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) */
static void of_bus_default_count_cells(void *blob, int parentoffset,
int *addrc, int *sizec)
{
const fdt32_t *prop;
if (addrc) {
prop = fdt_getprop(blob, parentoffset, "#address-cells", NULL);
if (prop)
*addrc = be32_to_cpup(prop);
else
*addrc = 2;
}
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 = of_read_number(range, na);
s = of_read_number(range + na + pna, ns);
da = of_read_number(addr, na);
debug("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(fdt32_t *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] = cpu_to_fdt32(a >> 32);
addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
return 0;
}
/* Array of bus specific translators */
static struct of_bus of_busses[] = {
/* Default */
{
.name = "default",
.addresses = "reg",
.count_cells = of_bus_default_count_cells,
.map = of_bus_default_map,
.translate = of_bus_default_translate,
},
};
static int of_translate_one(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 = of_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: "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
*/
static u64 __of_translate_address(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_busses[0];
/* 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 = 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)) {
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(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, 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 %llx,\n"
" but the device tree has it address %llx.\n",
alias, addr, dt_addr);
return 0;
}
return 1;
}
/*
* Returns the base address of an SOC or PCI node
*/
u64 fdt_get_base_address(void *fdt, int node)
{
int size;
u32 naddr;
const fdt32_t *prop;
prop = fdt_getprop(fdt, node, "#address-cells", &size);
if (prop && size == 4)
naddr = be32_to_cpup(prop);
else
naddr = 2;
prop = fdt_getprop(fdt, node, "ranges", &size);
return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
}