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1754 lines
43 KiB
1754 lines
43 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* (C) Copyright 2007 |
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* Gerald Van Baren, Custom IDEAS, [email protected] |
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* |
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* Copyright 2010-2011 Freescale Semiconductor, Inc. |
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*/ |
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|
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#include <common.h> |
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#include <stdio_dev.h> |
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#include <linux/ctype.h> |
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#include <linux/types.h> |
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#include <asm/global_data.h> |
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#include <linux/libfdt.h> |
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#include <fdt_support.h> |
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#include <exports.h> |
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#include <fdtdec.h> |
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|
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/** |
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* fdt_getprop_u32_default_node - Return a node's property or a default |
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* |
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* @fdt: ptr to device tree |
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* @off: offset of node |
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* @cell: cell offset in property |
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* @prop: property name |
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* @dflt: default value if the property isn't found |
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* |
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* Convenience function to return a node's property or a default value if |
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* the property doesn't exist. |
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*/ |
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u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell, |
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const char *prop, const u32 dflt) |
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{ |
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const fdt32_t *val; |
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int len; |
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|
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val = fdt_getprop(fdt, off, prop, &len); |
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|
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/* Check if property exists */ |
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if (!val) |
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return dflt; |
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|
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/* Check if property is long enough */ |
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if (len < ((cell + 1) * sizeof(uint32_t))) |
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return dflt; |
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|
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return fdt32_to_cpu(*val); |
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} |
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|
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/** |
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* fdt_getprop_u32_default - Find a node and return it's property or a default |
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* |
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* @fdt: ptr to device tree |
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* @path: path of node |
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* @prop: property name |
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* @dflt: default value if the property isn't found |
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* |
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* Convenience function to find a node and return it's property or a |
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* default value if it doesn't exist. |
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*/ |
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u32 fdt_getprop_u32_default(const void *fdt, const char *path, |
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const char *prop, const u32 dflt) |
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{ |
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int off; |
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|
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off = fdt_path_offset(fdt, path); |
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if (off < 0) |
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return dflt; |
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|
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return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt); |
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} |
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|
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/** |
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* fdt_find_and_setprop: Find a node and set it's property |
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* |
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* @fdt: ptr to device tree |
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* @node: path of node |
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* @prop: property name |
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* @val: ptr to new value |
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* @len: length of new property value |
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* @create: flag to create the property if it doesn't exist |
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* |
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* Convenience function to directly set a property given the path to the node. |
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*/ |
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int fdt_find_and_setprop(void *fdt, const char *node, const char *prop, |
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const void *val, int len, int create) |
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{ |
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int nodeoff = fdt_path_offset(fdt, node); |
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|
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if (nodeoff < 0) |
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return nodeoff; |
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|
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if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL)) |
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return 0; /* create flag not set; so exit quietly */ |
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|
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return fdt_setprop(fdt, nodeoff, prop, val, len); |
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} |
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|
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/** |
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* fdt_find_or_add_subnode() - find or possibly add a subnode of a given node |
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* |
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* @fdt: pointer to the device tree blob |
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* @parentoffset: structure block offset of a node |
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* @name: name of the subnode to locate |
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* |
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* fdt_subnode_offset() finds a subnode of the node with a given name. |
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* If the subnode does not exist, it will be created. |
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*/ |
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int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name) |
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{ |
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int offset; |
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|
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offset = fdt_subnode_offset(fdt, parentoffset, name); |
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|
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if (offset == -FDT_ERR_NOTFOUND) |
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offset = fdt_add_subnode(fdt, parentoffset, name); |
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|
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if (offset < 0) |
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printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset)); |
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return offset; |
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} |
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|
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/* rename to CONFIG_OF_STDOUT_PATH ? */ |
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#if defined(OF_STDOUT_PATH) |
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static int fdt_fixup_stdout(void *fdt, int chosenoff) |
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{ |
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return fdt_setprop(fdt, chosenoff, "linux,stdout-path", |
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OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1); |
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} |
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#elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX) |
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static int fdt_fixup_stdout(void *fdt, int chosenoff) |
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{ |
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int err; |
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int aliasoff; |
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char sername[9] = { 0 }; |
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const void *path; |
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int len; |
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char tmp[256]; /* long enough */ |
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|
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sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1); |
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|
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aliasoff = fdt_path_offset(fdt, "/aliases"); |
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if (aliasoff < 0) { |
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err = aliasoff; |
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goto noalias; |
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} |
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|
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path = fdt_getprop(fdt, aliasoff, sername, &len); |
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if (!path) { |
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err = len; |
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goto noalias; |
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} |
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|
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/* fdt_setprop may break "path" so we copy it to tmp buffer */ |
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memcpy(tmp, path, len); |
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|
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err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len); |
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if (err < 0) |
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printf("WARNING: could not set linux,stdout-path %s.\n", |
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fdt_strerror(err)); |
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|
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return err; |
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|
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noalias: |
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printf("WARNING: %s: could not read %s alias: %s\n", |
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__func__, sername, fdt_strerror(err)); |
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|
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return 0; |
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} |
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#else |
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static int fdt_fixup_stdout(void *fdt, int chosenoff) |
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{ |
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return 0; |
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} |
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#endif |
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|
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static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name, |
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uint64_t val, int is_u64) |
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{ |
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if (is_u64) |
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return fdt_setprop_u64(fdt, nodeoffset, name, val); |
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else |
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return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val); |
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} |
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|
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int fdt_root(void *fdt) |
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{ |
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char *serial; |
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int err; |
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|
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err = fdt_check_header(fdt); |
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if (err < 0) { |
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printf("fdt_root: %s\n", fdt_strerror(err)); |
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return err; |
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} |
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|
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serial = env_get("serial#"); |
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if (serial) { |
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err = fdt_setprop(fdt, 0, "serial-number", serial, |
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strlen(serial) + 1); |
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|
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if (err < 0) { |
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printf("WARNING: could not set serial-number %s.\n", |
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fdt_strerror(err)); |
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return err; |
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} |
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} |
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|
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return 0; |
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} |
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|
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int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end) |
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{ |
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int nodeoffset; |
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int err, j, total; |
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int is_u64; |
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uint64_t addr, size; |
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|
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/* just return if the size of initrd is zero */ |
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if (initrd_start == initrd_end) |
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return 0; |
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|
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/* find or create "/chosen" node. */ |
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nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); |
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if (nodeoffset < 0) |
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return nodeoffset; |
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|
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total = fdt_num_mem_rsv(fdt); |
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|
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/* |
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* Look for an existing entry and update it. If we don't find |
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* the entry, we will j be the next available slot. |
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*/ |
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for (j = 0; j < total; j++) { |
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err = fdt_get_mem_rsv(fdt, j, &addr, &size); |
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if (addr == initrd_start) { |
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fdt_del_mem_rsv(fdt, j); |
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break; |
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} |
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} |
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|
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err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start); |
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if (err < 0) { |
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printf("fdt_initrd: %s\n", fdt_strerror(err)); |
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return err; |
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} |
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is_u64 = (fdt_address_cells(fdt, 0) == 2); |
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err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start", |
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(uint64_t)initrd_start, is_u64); |
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|
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if (err < 0) { |
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printf("WARNING: could not set linux,initrd-start %s.\n", |
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fdt_strerror(err)); |
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return err; |
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} |
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err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end", |
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(uint64_t)initrd_end, is_u64); |
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if (err < 0) { |
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printf("WARNING: could not set linux,initrd-end %s.\n", |
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fdt_strerror(err)); |
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return err; |
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} |
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return 0; |
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} |
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int fdt_chosen(void *fdt) |
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{ |
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int nodeoffset; |
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int err; |
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char *str; /* used to set string properties */ |
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err = fdt_check_header(fdt); |
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if (err < 0) { |
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printf("fdt_chosen: %s\n", fdt_strerror(err)); |
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return err; |
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} |
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|
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/* find or create "/chosen" node. */ |
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nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen"); |
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if (nodeoffset < 0) |
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return nodeoffset; |
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|
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str = env_get("bootargs"); |
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if (str) { |
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err = fdt_setprop(fdt, nodeoffset, "bootargs", str, |
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strlen(str) + 1); |
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if (err < 0) { |
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printf("WARNING: could not set bootargs %s.\n", |
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fdt_strerror(err)); |
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return err; |
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} |
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} |
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|
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return fdt_fixup_stdout(fdt, nodeoffset); |
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} |
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|
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void do_fixup_by_path(void *fdt, const char *path, const char *prop, |
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const void *val, int len, int create) |
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{ |
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#if defined(DEBUG) |
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int i; |
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debug("Updating property '%s/%s' = ", path, prop); |
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for (i = 0; i < len; i++) |
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debug(" %.2x", *(u8*)(val+i)); |
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debug("\n"); |
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#endif |
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int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create); |
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if (rc) |
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printf("Unable to update property %s:%s, err=%s\n", |
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path, prop, fdt_strerror(rc)); |
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} |
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|
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void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop, |
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u32 val, int create) |
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{ |
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fdt32_t tmp = cpu_to_fdt32(val); |
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do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create); |
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} |
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|
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void do_fixup_by_prop(void *fdt, |
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const char *pname, const void *pval, int plen, |
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const char *prop, const void *val, int len, |
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int create) |
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{ |
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int off; |
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#if defined(DEBUG) |
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int i; |
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debug("Updating property '%s' = ", prop); |
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for (i = 0; i < len; i++) |
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debug(" %.2x", *(u8*)(val+i)); |
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debug("\n"); |
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#endif |
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off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen); |
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while (off != -FDT_ERR_NOTFOUND) { |
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if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) |
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fdt_setprop(fdt, off, prop, val, len); |
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off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen); |
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} |
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} |
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|
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void do_fixup_by_prop_u32(void *fdt, |
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const char *pname, const void *pval, int plen, |
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const char *prop, u32 val, int create) |
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{ |
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fdt32_t tmp = cpu_to_fdt32(val); |
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do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create); |
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} |
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|
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void do_fixup_by_compat(void *fdt, const char *compat, |
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const char *prop, const void *val, int len, int create) |
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{ |
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int off = -1; |
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#if defined(DEBUG) |
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int i; |
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debug("Updating property '%s' = ", prop); |
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for (i = 0; i < len; i++) |
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debug(" %.2x", *(u8*)(val+i)); |
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debug("\n"); |
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#endif |
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off = fdt_node_offset_by_compatible(fdt, -1, compat); |
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while (off != -FDT_ERR_NOTFOUND) { |
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if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL)) |
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fdt_setprop(fdt, off, prop, val, len); |
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off = fdt_node_offset_by_compatible(fdt, off, compat); |
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} |
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} |
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|
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void do_fixup_by_compat_u32(void *fdt, const char *compat, |
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const char *prop, u32 val, int create) |
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{ |
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fdt32_t tmp = cpu_to_fdt32(val); |
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do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create); |
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} |
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|
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#ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY |
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/* |
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* fdt_pack_reg - pack address and size array into the "reg"-suitable stream |
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*/ |
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static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size, |
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int n) |
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{ |
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int i; |
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int address_cells = fdt_address_cells(fdt, 0); |
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int size_cells = fdt_size_cells(fdt, 0); |
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char *p = buf; |
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|
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for (i = 0; i < n; i++) { |
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if (address_cells == 2) |
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*(fdt64_t *)p = cpu_to_fdt64(address[i]); |
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else |
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*(fdt32_t *)p = cpu_to_fdt32(address[i]); |
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p += 4 * address_cells; |
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|
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if (size_cells == 2) |
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*(fdt64_t *)p = cpu_to_fdt64(size[i]); |
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else |
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*(fdt32_t *)p = cpu_to_fdt32(size[i]); |
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p += 4 * size_cells; |
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} |
|
|
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return p - (char *)buf; |
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} |
|
|
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#if CONFIG_NR_DRAM_BANKS > 4 |
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#define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS |
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#else |
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#define MEMORY_BANKS_MAX 4 |
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#endif |
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int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks) |
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{ |
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int err, nodeoffset; |
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int len, i; |
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u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */ |
|
|
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if (banks > MEMORY_BANKS_MAX) { |
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printf("%s: num banks %d exceeds hardcoded limit %d." |
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" Recompile with higher MEMORY_BANKS_MAX?\n", |
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__FUNCTION__, banks, MEMORY_BANKS_MAX); |
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return -1; |
|
} |
|
|
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err = fdt_check_header(blob); |
|
if (err < 0) { |
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printf("%s: %s\n", __FUNCTION__, fdt_strerror(err)); |
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return err; |
|
} |
|
|
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/* find or create "/memory" node. */ |
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nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory"); |
|
if (nodeoffset < 0) |
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return nodeoffset; |
|
|
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err = fdt_setprop(blob, nodeoffset, "device_type", "memory", |
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sizeof("memory")); |
|
if (err < 0) { |
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printf("WARNING: could not set %s %s.\n", "device_type", |
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fdt_strerror(err)); |
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return err; |
|
} |
|
|
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for (i = 0; i < banks; i++) { |
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if (start[i] == 0 && size[i] == 0) |
|
break; |
|
} |
|
|
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banks = i; |
|
|
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if (!banks) |
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return 0; |
|
|
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for (i = 0; i < banks; i++) |
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if (start[i] == 0 && size[i] == 0) |
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break; |
|
|
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banks = i; |
|
|
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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 = 0, j, prop; |
|
char *tmp, *end; |
|
char mac[16]; |
|
const char *path; |
|
unsigned char mac_addr[ARP_HLEN]; |
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int offset; |
|
#ifdef FDT_SEQ_MACADDR_FROM_ENV |
|
int nodeoff; |
|
const struct fdt_property *fdt_prop; |
|
#endif |
|
|
|
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 (j = 0; j < prop; j++) |
|
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") |
|
#ifdef FDT_SEQ_MACADDR_FROM_ENV |
|
|| !strcmp(name, "ethernet0") |
|
#endif |
|
) |
|
i = 0; |
|
#ifndef FDT_SEQ_MACADDR_FROM_ENV |
|
else |
|
i = trailing_strtol(name); |
|
#endif |
|
if (i != -1) { |
|
if (i == 0) |
|
strcpy(mac, "ethaddr"); |
|
else |
|
sprintf(mac, "eth%daddr", i); |
|
} else { |
|
continue; |
|
} |
|
#ifdef FDT_SEQ_MACADDR_FROM_ENV |
|
nodeoff = fdt_path_offset(fdt, path); |
|
fdt_prop = fdt_get_property(fdt, nodeoff, "status", |
|
NULL); |
|
if (fdt_prop && !strcmp(fdt_prop->data, "disabled")) |
|
continue; |
|
i++; |
|
#endif |
|
tmp = env_get(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); |
|
} |
|
} |
|
} |
|
|
|
int fdt_record_loadable(void *blob, u32 index, const char *name, |
|
uintptr_t load_addr, u32 size, uintptr_t entry_point, |
|
const char *type, const char *os) |
|
{ |
|
int err, node; |
|
|
|
err = fdt_check_header(blob); |
|
if (err < 0) { |
|
printf("%s: %s\n", __func__, fdt_strerror(err)); |
|
return err; |
|
} |
|
|
|
/* find or create "/fit-images" node */ |
|
node = fdt_find_or_add_subnode(blob, 0, "fit-images"); |
|
if (node < 0) |
|
return node; |
|
|
|
/* find or create "/fit-images/<name>" node */ |
|
node = fdt_find_or_add_subnode(blob, node, name); |
|
if (node < 0) |
|
return node; |
|
|
|
/* |
|
* We record these as 32bit entities, possibly truncating addresses. |
|
* However, spl_fit.c is not 64bit safe either: i.e. we should not |
|
* have an issue here. |
|
*/ |
|
fdt_setprop_u32(blob, node, "load-addr", load_addr); |
|
if (entry_point != -1) |
|
fdt_setprop_u32(blob, node, "entry-point", entry_point); |
|
fdt_setprop_u32(blob, node, "size", size); |
|
if (type) |
|
fdt_setprop_string(blob, node, "type", type); |
|
if (os) |
|
fdt_setprop_string(blob, node, "os", os); |
|
|
|
return node; |
|
} |
|
|
|
/* 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; |
|
}; |
|
|
|
static 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; |
|
} |
|
|
|
static 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, const struct node_info *node_info, |
|
int node_info_size) |
|
{ |
|
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, |
|
node_info[i].compat); |
|
while (noff != -FDT_ERR_NOTFOUND) { |
|
debug("%s: %s, mtd dev type %d\n", |
|
fdt_get_name(blob, noff, 0), |
|
node_info[i].compat, node_info[i].type); |
|
dev = device_find(node_info[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, |
|
node_info[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=%llu, s=%llu, da=%llu\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=%llu, s=%llu, da=%llu\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: %llu\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 %llu,\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(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@%llx", 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; |
|
} |
|
|
|
#ifdef CONFIG_OF_LIBFDT_OVERLAY |
|
/** |
|
* fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting |
|
* |
|
* @fdt: ptr to device tree |
|
* @fdto: ptr to device tree overlay |
|
* |
|
* Convenience function to apply an overlay and display helpful messages |
|
* in the case of an error |
|
*/ |
|
int fdt_overlay_apply_verbose(void *fdt, void *fdto) |
|
{ |
|
int err; |
|
bool has_symbols; |
|
|
|
err = fdt_path_offset(fdt, "/__symbols__"); |
|
has_symbols = err >= 0; |
|
|
|
err = fdt_overlay_apply(fdt, fdto); |
|
if (err < 0) { |
|
printf("failed on fdt_overlay_apply(): %s\n", |
|
fdt_strerror(err)); |
|
if (!has_symbols) { |
|
printf("base fdt does did not have a /__symbols__ node\n"); |
|
printf("make sure you've compiled with -@\n"); |
|
} |
|
} |
|
return err; |
|
} |
|
#endif
|
|
|