u-boot/drivers/core/ofnode.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2017 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#include <common.h>
#include <dm.h>
#include <fdtdec.h>
#include <fdt_support.h>
#include <linux/libfdt.h>
#include <dm/of_access.h>
#include <dm/of_addr.h>
#include <dm/ofnode.h>
#include <linux/err.h>
#include <linux/ioport.h>
int ofnode_read_u32(ofnode node, const char *propname, u32 *outp)
{
assert(ofnode_valid(node));
debug("%s: %s: ", __func__, propname);
if (ofnode_is_np(node)) {
return of_read_u32(ofnode_to_np(node), propname, outp);
} else {
const fdt32_t *cell;
int len;
cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
propname, &len);
if (!cell || len < sizeof(int)) {
debug("(not found)\n");
return -EINVAL;
}
*outp = fdt32_to_cpu(cell[0]);
}
debug("%#x (%d)\n", *outp, *outp);
return 0;
}
int ofnode_read_u32_default(ofnode node, const char *propname, u32 def)
{
assert(ofnode_valid(node));
ofnode_read_u32(node, propname, &def);
return def;
}
int ofnode_read_s32_default(ofnode node, const char *propname, s32 def)
{
assert(ofnode_valid(node));
ofnode_read_u32(node, propname, (u32 *)&def);
return def;
}
int ofnode_read_u64(ofnode node, const char *propname, u64 *outp)
{
const fdt64_t *cell;
int len;
assert(ofnode_valid(node));
debug("%s: %s: ", __func__, propname);
if (ofnode_is_np(node))
return of_read_u64(ofnode_to_np(node), propname, outp);
cell = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
&len);
if (!cell || len < sizeof(*cell)) {
debug("(not found)\n");
return -EINVAL;
}
*outp = fdt64_to_cpu(cell[0]);
debug("%#llx (%lld)\n", (unsigned long long)*outp,
(unsigned long long)*outp);
return 0;
}
int ofnode_read_u64_default(ofnode node, const char *propname, u64 def)
{
assert(ofnode_valid(node));
ofnode_read_u64(node, propname, &def);
return def;
}
bool ofnode_read_bool(ofnode node, const char *propname)
{
const void *prop;
assert(ofnode_valid(node));
debug("%s: %s: ", __func__, propname);
prop = ofnode_get_property(node, propname, NULL);
debug("%s\n", prop ? "true" : "false");
return prop ? true : false;
}
const char *ofnode_read_string(ofnode node, const char *propname)
{
const char *str = NULL;
int len = -1;
assert(ofnode_valid(node));
debug("%s: %s: ", __func__, propname);
if (ofnode_is_np(node)) {
struct property *prop = of_find_property(
ofnode_to_np(node), propname, NULL);
if (prop) {
str = prop->value;
len = prop->length;
}
} else {
str = fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
propname, &len);
}
if (!str) {
debug("<not found>\n");
return NULL;
}
if (strnlen(str, len) >= len) {
debug("<invalid>\n");
return NULL;
}
debug("%s\n", str);
return str;
}
ofnode ofnode_find_subnode(ofnode node, const char *subnode_name)
{
ofnode subnode;
assert(ofnode_valid(node));
debug("%s: %s: ", __func__, subnode_name);
if (ofnode_is_np(node)) {
const struct device_node *np = ofnode_to_np(node);
for (np = np->child; np; np = np->sibling) {
if (!strcmp(subnode_name, np->name))
break;
}
subnode = np_to_ofnode(np);
} else {
int ooffset = fdt_subnode_offset(gd->fdt_blob,
ofnode_to_offset(node), subnode_name);
subnode = offset_to_ofnode(ooffset);
}
debug("%s\n", ofnode_valid(subnode) ?
ofnode_get_name(subnode) : "<none>");
return subnode;
}
int ofnode_read_u32_array(ofnode node, const char *propname,
u32 *out_values, size_t sz)
{
assert(ofnode_valid(node));
debug("%s: %s: ", __func__, propname);
if (ofnode_is_np(node)) {
return of_read_u32_array(ofnode_to_np(node), propname,
out_values, sz);
} else {
return fdtdec_get_int_array(gd->fdt_blob,
ofnode_to_offset(node), propname,
out_values, sz);
}
}
ofnode ofnode_first_subnode(ofnode node)
{
assert(ofnode_valid(node));
if (ofnode_is_np(node))
return np_to_ofnode(node.np->child);
return offset_to_ofnode(
fdt_first_subnode(gd->fdt_blob, ofnode_to_offset(node)));
}
ofnode ofnode_next_subnode(ofnode node)
{
assert(ofnode_valid(node));
if (ofnode_is_np(node))
return np_to_ofnode(node.np->sibling);
return offset_to_ofnode(
fdt_next_subnode(gd->fdt_blob, ofnode_to_offset(node)));
}
ofnode ofnode_get_parent(ofnode node)
{
ofnode parent;
assert(ofnode_valid(node));
if (ofnode_is_np(node))
parent = np_to_ofnode(of_get_parent(ofnode_to_np(node)));
else
parent.of_offset = fdt_parent_offset(gd->fdt_blob,
ofnode_to_offset(node));
return parent;
}
const char *ofnode_get_name(ofnode node)
{
assert(ofnode_valid(node));
if (ofnode_is_np(node))
return strrchr(node.np->full_name, '/') + 1;
return fdt_get_name(gd->fdt_blob, ofnode_to_offset(node), NULL);
}
ofnode ofnode_get_by_phandle(uint phandle)
{
ofnode node;
if (of_live_active())
node = np_to_ofnode(of_find_node_by_phandle(phandle));
else
node.of_offset = fdt_node_offset_by_phandle(gd->fdt_blob,
phandle);
return node;
}
int ofnode_read_size(ofnode node, const char *propname)
{
int len;
if (ofnode_is_np(node)) {
struct property *prop = of_find_property(
ofnode_to_np(node), propname, NULL);
if (prop)
return prop->length;
} else {
if (fdt_getprop(gd->fdt_blob, ofnode_to_offset(node), propname,
&len))
return len;
}
return -EINVAL;
}
fdt_addr_t ofnode_get_addr_index(ofnode node, int index)
{
if (ofnode_is_np(node)) {
const __be32 *prop_val;
uint flags;
u64 size;
int na;
int ns;
prop_val = of_get_address(ofnode_to_np(node), index, &size,
&flags);
if (!prop_val)
return FDT_ADDR_T_NONE;
ns = of_n_size_cells(ofnode_to_np(node));
if (IS_ENABLED(CONFIG_OF_TRANSLATE) && ns > 0) {
return of_translate_address(ofnode_to_np(node), prop_val);
} else {
na = of_n_addr_cells(ofnode_to_np(node));
return of_read_number(prop_val, na);
}
} else {
return fdt_get_base_address(gd->fdt_blob,
ofnode_to_offset(node));
}
return FDT_ADDR_T_NONE;
}
fdt_addr_t ofnode_get_addr(ofnode node)
{
return ofnode_get_addr_index(node, 0);
}
int ofnode_stringlist_search(ofnode node, const char *property,
const char *string)
{
if (ofnode_is_np(node)) {
return of_property_match_string(ofnode_to_np(node),
property, string);
} else {
int ret;
ret = fdt_stringlist_search(gd->fdt_blob,
ofnode_to_offset(node), property,
string);
if (ret == -FDT_ERR_NOTFOUND)
return -ENODATA;
else if (ret < 0)
return -EINVAL;
return ret;
}
}
int ofnode_read_string_index(ofnode node, const char *property, int index,
const char **outp)
{
if (ofnode_is_np(node)) {
return of_property_read_string_index(ofnode_to_np(node),
property, index, outp);
} else {
int len;
*outp = fdt_stringlist_get(gd->fdt_blob, ofnode_to_offset(node),
property, index, &len);
if (len < 0)
return -EINVAL;
return 0;
}
}
int ofnode_read_string_count(ofnode node, const char *property)
{
if (ofnode_is_np(node)) {
return of_property_count_strings(ofnode_to_np(node), property);
} else {
return fdt_stringlist_count(gd->fdt_blob,
ofnode_to_offset(node), property);
}
}
static void ofnode_from_fdtdec_phandle_args(struct fdtdec_phandle_args *in,
struct ofnode_phandle_args *out)
{
assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
out->node = offset_to_ofnode(in->node);
out->args_count = in->args_count;
memcpy(out->args, in->args, sizeof(out->args));
}
static void ofnode_from_of_phandle_args(struct of_phandle_args *in,
struct ofnode_phandle_args *out)
{
assert(OF_MAX_PHANDLE_ARGS == MAX_PHANDLE_ARGS);
out->node = np_to_ofnode(in->np);
out->args_count = in->args_count;
memcpy(out->args, in->args, sizeof(out->args));
}
int ofnode_parse_phandle_with_args(ofnode node, const char *list_name,
const char *cells_name, int cell_count,
int index,
struct ofnode_phandle_args *out_args)
{
if (ofnode_is_np(node)) {
struct of_phandle_args args;
int ret;
ret = of_parse_phandle_with_args(ofnode_to_np(node),
list_name, cells_name, index,
&args);
if (ret)
return ret;
ofnode_from_of_phandle_args(&args, out_args);
} else {
struct fdtdec_phandle_args args;
int ret;
ret = fdtdec_parse_phandle_with_args(gd->fdt_blob,
ofnode_to_offset(node),
list_name, cells_name,
cell_count, index, &args);
if (ret)
return ret;
ofnode_from_fdtdec_phandle_args(&args, out_args);
}
return 0;
}
int ofnode_count_phandle_with_args(ofnode node, const char *list_name,
const char *cells_name)
{
if (ofnode_is_np(node))
return of_count_phandle_with_args(ofnode_to_np(node),
list_name, cells_name);
else
return fdtdec_parse_phandle_with_args(gd->fdt_blob,
ofnode_to_offset(node), list_name, cells_name,
0, -1, NULL);
}
ofnode ofnode_path(const char *path)
{
if (of_live_active())
return np_to_ofnode(of_find_node_by_path(path));
else
return offset_to_ofnode(fdt_path_offset(gd->fdt_blob, path));
}
const char *ofnode_get_chosen_prop(const char *name)
{
ofnode chosen_node;
chosen_node = ofnode_path("/chosen");
return ofnode_read_string(chosen_node, name);
}
ofnode ofnode_get_chosen_node(const char *name)
{
const char *prop;
prop = ofnode_get_chosen_prop(name);
if (!prop)
return ofnode_null();
return ofnode_path(prop);
}
static int decode_timing_property(ofnode node, const char *name,
struct timing_entry *result)
{
int length, ret = 0;
length = ofnode_read_size(node, name);
if (length < 0) {
debug("%s: could not find property %s\n",
ofnode_get_name(node), name);
return length;
}
if (length == sizeof(u32)) {
result->typ = ofnode_read_u32_default(node, name, 0);
result->min = result->typ;
result->max = result->typ;
} else {
ret = ofnode_read_u32_array(node, name, &result->min, 3);
}
return ret;
}
int ofnode_decode_display_timing(ofnode parent, int index,
struct display_timing *dt)
{
int i;
ofnode timings, node;
u32 val = 0;
int ret = 0;
timings = ofnode_find_subnode(parent, "display-timings");
if (!ofnode_valid(timings))
return -EINVAL;
i = 0;
ofnode_for_each_subnode(node, timings) {
if (i++ == index)
break;
}
if (!ofnode_valid(node))
return -EINVAL;
memset(dt, 0, sizeof(*dt));
ret |= decode_timing_property(node, "hback-porch", &dt->hback_porch);
ret |= decode_timing_property(node, "hfront-porch", &dt->hfront_porch);
ret |= decode_timing_property(node, "hactive", &dt->hactive);
ret |= decode_timing_property(node, "hsync-len", &dt->hsync_len);
ret |= decode_timing_property(node, "vback-porch", &dt->vback_porch);
ret |= decode_timing_property(node, "vfront-porch", &dt->vfront_porch);
ret |= decode_timing_property(node, "vactive", &dt->vactive);
ret |= decode_timing_property(node, "vsync-len", &dt->vsync_len);
ret |= decode_timing_property(node, "clock-frequency", &dt->pixelclock);
dt->flags = 0;
val = ofnode_read_u32_default(node, "vsync-active", -1);
if (val != -1) {
dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
DISPLAY_FLAGS_VSYNC_LOW;
}
val = ofnode_read_u32_default(node, "hsync-active", -1);
if (val != -1) {
dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
DISPLAY_FLAGS_HSYNC_LOW;
}
val = ofnode_read_u32_default(node, "de-active", -1);
if (val != -1) {
dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
DISPLAY_FLAGS_DE_LOW;
}
val = ofnode_read_u32_default(node, "pixelclk-active", -1);
if (val != -1) {
dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
DISPLAY_FLAGS_PIXDATA_NEGEDGE;
}
if (ofnode_read_bool(node, "interlaced"))
dt->flags |= DISPLAY_FLAGS_INTERLACED;
if (ofnode_read_bool(node, "doublescan"))
dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
if (ofnode_read_bool(node, "doubleclk"))
dt->flags |= DISPLAY_FLAGS_DOUBLECLK;
return ret;
}
const void *ofnode_get_property(ofnode node, const char *propname, int *lenp)
{
if (ofnode_is_np(node))
return of_get_property(ofnode_to_np(node), propname, lenp);
else
return fdt_getprop(gd->fdt_blob, ofnode_to_offset(node),
propname, lenp);
}
bool ofnode_is_available(ofnode node)
{
if (ofnode_is_np(node))
return of_device_is_available(ofnode_to_np(node));
else
return fdtdec_get_is_enabled(gd->fdt_blob,
ofnode_to_offset(node));
}
fdt_addr_t ofnode_get_addr_size(ofnode node, const char *property,
fdt_size_t *sizep)
{
if (ofnode_is_np(node)) {
int na, ns;
int psize;
const struct device_node *np = ofnode_to_np(node);
const __be32 *prop = of_get_property(np, property, &psize);
if (!prop)
return FDT_ADDR_T_NONE;
na = of_n_addr_cells(np);
ns = of_n_size_cells(np);
*sizep = of_read_number(prop + na, ns);
if (IS_ENABLED(CONFIG_OF_TRANSLATE) && ns > 0)
return of_translate_address(np, prop);
else
return of_read_number(prop, na);
} else {
return fdtdec_get_addr_size(gd->fdt_blob,
ofnode_to_offset(node), property,
sizep);
}
}
const uint8_t *ofnode_read_u8_array_ptr(ofnode node, const char *propname,
size_t sz)
{
if (ofnode_is_np(node)) {
const struct device_node *np = ofnode_to_np(node);
int psize;
const __be32 *prop = of_get_property(np, propname, &psize);
if (!prop || sz != psize)
return NULL;
return (uint8_t *)prop;
} else {
return fdtdec_locate_byte_array(gd->fdt_blob,
ofnode_to_offset(node), propname, sz);
}
}
int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
const char *propname, struct fdt_pci_addr *addr)
{
const fdt32_t *cell;
int len;
int ret = -ENOENT;
debug("%s: %s: ", __func__, propname);
/*
* If we follow the pci bus bindings strictly, we should check
* the value of the node's parent node's #address-cells and
* #size-cells. They need to be 3 and 2 accordingly. However,
* for simplicity we skip the check here.
*/
cell = ofnode_get_property(node, propname, &len);
if (!cell)
goto fail;
if ((len % FDT_PCI_REG_SIZE) == 0) {
int num = len / FDT_PCI_REG_SIZE;
int i;
for (i = 0; i < num; i++) {
debug("pci address #%d: %08lx %08lx %08lx\n", i,
(ulong)fdt32_to_cpu(cell[0]),
(ulong)fdt32_to_cpu(cell[1]),
(ulong)fdt32_to_cpu(cell[2]));
if ((fdt32_to_cpu(*cell) & type) == type) {
addr->phys_hi = fdt32_to_cpu(cell[0]);
addr->phys_mid = fdt32_to_cpu(cell[1]);
addr->phys_lo = fdt32_to_cpu(cell[1]);
break;
}
cell += (FDT_PCI_ADDR_CELLS +
FDT_PCI_SIZE_CELLS);
}
if (i == num) {
ret = -ENXIO;
goto fail;
}
return 0;
}
ret = -EINVAL;
fail:
debug("(not found)\n");
return ret;
}
int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device)
{
const char *list, *end;
int len;
list = ofnode_get_property(node, "compatible", &len);
if (!list)
return -ENOENT;
end = list + len;
while (list < end) {
len = strlen(list);
if (len >= strlen("pciVVVV,DDDD")) {
char *s = strstr(list, "pci");
/*
* check if the string is something like pciVVVV,DDDD.RR
* or just pciVVVV,DDDD
*/
if (s && s[7] == ',' &&
(s[12] == '.' || s[12] == 0)) {
s += 3;
*vendor = simple_strtol(s, NULL, 16);
s += 5;
*device = simple_strtol(s, NULL, 16);
return 0;
}
}
list += (len + 1);
}
return -ENOENT;
}
int ofnode_read_addr_cells(ofnode node)
{
if (ofnode_is_np(node))
return of_n_addr_cells(ofnode_to_np(node));
else /* NOTE: this call should walk up the parent stack */
return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
}
int ofnode_read_size_cells(ofnode node)
{
if (ofnode_is_np(node))
return of_n_size_cells(ofnode_to_np(node));
else /* NOTE: this call should walk up the parent stack */
return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
}
int ofnode_read_simple_addr_cells(ofnode node)
{
if (ofnode_is_np(node))
return of_simple_addr_cells(ofnode_to_np(node));
else
return fdt_address_cells(gd->fdt_blob, ofnode_to_offset(node));
}
int ofnode_read_simple_size_cells(ofnode node)
{
if (ofnode_is_np(node))
return of_simple_size_cells(ofnode_to_np(node));
else
return fdt_size_cells(gd->fdt_blob, ofnode_to_offset(node));
}
bool ofnode_pre_reloc(ofnode node)
{
if (ofnode_read_bool(node, "u-boot,dm-pre-reloc"))
return true;
if (ofnode_read_bool(node, "u-boot,dm-pre-proper"))
return true;
#ifdef CONFIG_TPL_BUILD
if (ofnode_read_bool(node, "u-boot,dm-tpl"))
return true;
#elif defined(CONFIG_SPL_BUILD)
if (ofnode_read_bool(node, "u-boot,dm-spl"))
return true;
#else
/*
* In regular builds individual spl and tpl handling both
* count as handled pre-relocation for later second init.
*/
if (ofnode_read_bool(node, "u-boot,dm-spl") ||
ofnode_read_bool(node, "u-boot,dm-tpl"))
return true;
#endif
return false;
}
int ofnode_read_resource(ofnode node, uint index, struct resource *res)
{
if (ofnode_is_np(node)) {
return of_address_to_resource(ofnode_to_np(node), index, res);
} else {
struct fdt_resource fres;
int ret;
ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node),
"reg", index, &fres);
if (ret < 0)
return -EINVAL;
memset(res, '\0', sizeof(*res));
res->start = fres.start;
res->end = fres.end;
return 0;
}
}
int ofnode_read_resource_byname(ofnode node, const char *name,
struct resource *res)
{
int index;
index = ofnode_stringlist_search(node, "reg-names", name);
if (index < 0)
return index;
return ofnode_read_resource(node, index, res);
}
u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr)
{
if (ofnode_is_np(node))
return of_translate_address(ofnode_to_np(node), in_addr);
else
return fdt_translate_address(gd->fdt_blob, ofnode_to_offset(node), in_addr);
}
int ofnode_device_is_compatible(ofnode node, const char *compat)
{
if (ofnode_is_np(node))
return of_device_is_compatible(ofnode_to_np(node), compat,
NULL, NULL);
else
return !fdt_node_check_compatible(gd->fdt_blob,
ofnode_to_offset(node),
compat);
}
ofnode ofnode_by_compatible(ofnode from, const char *compat)
{
if (of_live_active()) {
return np_to_ofnode(of_find_compatible_node(
(struct device_node *)ofnode_to_np(from), NULL,
compat));
} else {
return offset_to_ofnode(fdt_node_offset_by_compatible(
gd->fdt_blob, ofnode_to_offset(from), compat));
}
}
ofnode ofnode_by_prop_value(ofnode from, const char *propname,
const void *propval, int proplen)
{
if (of_live_active()) {
return np_to_ofnode(of_find_node_by_prop_value(
(struct device_node *)ofnode_to_np(from), propname,
propval, proplen));
} else {
return offset_to_ofnode(fdt_node_offset_by_prop_value(
gd->fdt_blob, ofnode_to_offset(from),
propname, propval, proplen));
}
}
int ofnode_write_prop(ofnode node, const char *propname, int len,
const void *value)
{
const struct device_node *np = ofnode_to_np(node);
struct property *pp;
struct property *pp_last = NULL;
struct property *new;
if (!of_live_active())
return -ENOSYS;
if (!np)
return -EINVAL;
for (pp = np->properties; pp; pp = pp->next) {
if (strcmp(pp->name, propname) == 0) {
/* Property exists -> change value */
pp->value = (void *)value;
pp->length = len;
return 0;
}
pp_last = pp;
}
if (!pp_last)
return -ENOENT;
/* Property does not exist -> append new property */
new = malloc(sizeof(struct property));
if (!new)
return -ENOMEM;
new->name = strdup(propname);
if (!new->name) {
free(new);
return -ENOMEM;
}
new->value = (void *)value;
new->length = len;
new->next = NULL;
pp_last->next = new;
return 0;
}
int ofnode_write_string(ofnode node, const char *propname, const char *value)
{
if (!of_live_active())
return -ENOSYS;
assert(ofnode_valid(node));
debug("%s: %s = %s", __func__, propname, value);
return ofnode_write_prop(node, propname, strlen(value) + 1, value);
}
int ofnode_set_enabled(ofnode node, bool value)
{
if (!of_live_active())
return -ENOSYS;
assert(ofnode_valid(node));
if (value)
return ofnode_write_string(node, "status", "okay");
else
return ofnode_write_string(node, "status", "disable");
}