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fdt_support.c
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/*
* (C) Copyright 2007
* Gerald Van Baren, Custom IDEAS, [email protected]
*
* 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);
}
/*
* 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;
}
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[6];
int offset;
if (fdt_path_offset(fdt, "/aliases") < 0)
return;
/* Cycle through all aliases */
for (prop = 0; ; prop++) {
const char *name;
int len = strlen("ethernet");
/* 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", len)) {
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)
{
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%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;
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);
}
/* 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);