Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Portions from U-Boot cmd_fdt.c (C) Copyright 2007
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Based on code written by:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *   Pantelis Antoniou <pantelis.antoniou@gmail.com> and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  *   Matthew McClintock <msm@freescale.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <assert.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <ctype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <getopt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <libfdt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include "util.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) enum display_mode {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	MODE_SHOW_VALUE,	/* show values for node properties */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	MODE_LIST_PROPS,	/* list the properties for a node */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	MODE_LIST_SUBNODES,	/* list the subnodes of a node */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) /* Holds information which controls our output and options */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) struct display_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	int type;		/* data type (s/i/u/x or 0 for default) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	int size;		/* data size (1/2/4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	enum display_mode mode;	/* display mode that we are using */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	const char *default_val; /* default value if node/property not found */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) static void report_error(const char *where, int err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	fprintf(stderr, "Error at '%s': %s\n", where, fdt_strerror(err));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  * Displays data of a given length according to selected options
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45)  * If a specific data type is provided in disp, then this is used. Otherwise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  * we try to guess the data type / size from the contents.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48)  * @param disp		Display information / options
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49)  * @param data		Data to display
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50)  * @param len		Maximum length of buffer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51)  * @return 0 if ok, -1 if data does not match format
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) static int show_data(struct display_info *disp, const char *data, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	int i, size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	const uint8_t *p = (const uint8_t *)data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	const char *s;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	int value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	int is_string;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	char fmt[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	/* no data, don't print */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	if (len == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	is_string = (disp->type) == 's' ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		(!disp->type && util_is_printable_string(data, len));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	if (is_string) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		if (data[len - 1] != '\0') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 			fprintf(stderr, "Unterminated string\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 			return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		for (s = data; s - data < len; s += strlen(s) + 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 			if (s != data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 				printf(" ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 			printf("%s", (const char *)s);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	size = disp->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	if (size == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		size = (len % 4) == 0 ? 4 : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	} else if (len % size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		fprintf(stderr, "Property length must be a multiple of "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 				"selected data size\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	fmt[0] = '%';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	fmt[1] = disp->type ? disp->type : 'd';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	fmt[2] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	for (i = 0; i < len; i += size, p += size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		if (i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 			printf(" ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		value = size == 4 ? fdt32_to_cpu(*(const uint32_t *)p) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 			size == 2 ? (*p << 8) | p[1] : *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		printf(fmt, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)  * List all properties in a node, one per line.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)  * @param blob		FDT blob
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)  * @param node		Node to display
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)  * @return 0 if ok, or FDT_ERR... if not.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static int list_properties(const void *blob, int node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	const struct fdt_property *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	int prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	prop = fdt_first_property_offset(blob, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		/* Stop silently when there are no more properties */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		if (prop < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 			return prop == -FDT_ERR_NOTFOUND ? 0 : prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		data = fdt_get_property_by_offset(blob, prop, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		name = fdt_string(blob, fdt32_to_cpu(data->nameoff));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		if (name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 			puts(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		prop = fdt_next_property_offset(blob, prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	} while (1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) #define MAX_LEVEL	32		/* how deeply nested we will go */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)  * List all subnodes in a node, one per line
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)  * @param blob		FDT blob
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)  * @param node		Node to display
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)  * @return 0 if ok, or FDT_ERR... if not.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static int list_subnodes(const void *blob, int node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	int nextoffset;		/* next node offset from libfdt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	uint32_t tag;		/* current tag */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	int level = 0;		/* keep track of nesting level */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	const char *pathp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	int depth = 1;		/* the assumed depth of this node */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	while (level >= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		tag = fdt_next_tag(blob, node, &nextoffset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		switch (tag) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		case FDT_BEGIN_NODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 			pathp = fdt_get_name(blob, node, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 			if (level <= depth) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 				if (pathp == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 					pathp = "/* NULL pointer error */";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 				if (*pathp == '\0')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 					pathp = "/";	/* root is nameless */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 				if (level == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 					puts(pathp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 			level++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 			if (level >= MAX_LEVEL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 				printf("Nested too deep, aborting.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 				return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		case FDT_END_NODE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 			level--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 			if (level == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 				level = -1;		/* exit the loop */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		case FDT_END:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 			return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		case FDT_PROP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 			if (level <= depth)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 				printf("Unknown tag 0x%08X\n", tag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 			return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		node = nextoffset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)  * Show the data for a given node (and perhaps property) according to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)  * display option provided.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)  * @param blob		FDT blob
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)  * @param disp		Display information / options
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)  * @param node		Node to display
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)  * @param property	Name of property to display, or NULL if none
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)  * @return 0 if ok, -ve on error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) static int show_data_for_item(const void *blob, struct display_info *disp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		int node, const char *property)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	const void *value = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	int len, err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	switch (disp->mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	case MODE_LIST_PROPS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		err = list_properties(blob, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	case MODE_LIST_SUBNODES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		err = list_subnodes(blob, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		assert(property);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		value = fdt_getprop(blob, node, property, &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		if (value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 			if (show_data(disp, value, len))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 				err = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 			else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 				printf("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		} else if (disp->default_val) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 			puts(disp->default_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 			report_error(property, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 			err = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)  * Run the main fdtget operation, given a filename and valid arguments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)  * @param disp		Display information / options
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)  * @param filename	Filename of blob file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)  * @param arg		List of arguments to process
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)  * @param arg_count	Number of arguments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)  * @param return 0 if ok, -ve on error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) static int do_fdtget(struct display_info *disp, const char *filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		     char **arg, int arg_count, int args_per_step)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	char *blob;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	const char *prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	int i, node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	blob = utilfdt_read(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	if (!blob)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	for (i = 0; i + args_per_step <= arg_count; i += args_per_step) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 		node = fdt_path_offset(blob, arg[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		if (node < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 			if (disp->default_val) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 				puts(disp->default_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 				continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 			} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 				report_error(arg[i], node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 				return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 		prop = args_per_step == 1 ? NULL : arg[i + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		if (show_data_for_item(blob, disp, node, prop))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 			return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) static const char *usage_msg =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	"fdtget - read values from device tree\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	"\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	"Each value is printed on a new line.\n\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	"Usage:\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	"	fdtget <options> <dt file> [<node> <property>]...\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	"	fdtget -p <options> <dt file> [<node> ]...\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	"Options:\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	"\t-t <type>\tType of data\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	"\t-p\t\tList properties for each node\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	"\t-l\t\tList subnodes for each node\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	"\t-d\t\tDefault value to display when the property is "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 			"missing\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	"\t-h\t\tPrint this help\n\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	USAGE_TYPE_MSG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) static void usage(const char *msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	if (msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		fprintf(stderr, "Error: %s\n\n", msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	fprintf(stderr, "%s", usage_msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	exit(2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) int main(int argc, char *argv[])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	char *filename = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	struct display_info disp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	int args_per_step = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	/* set defaults */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	memset(&disp, '\0', sizeof(disp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	disp.size = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	disp.mode = MODE_SHOW_VALUE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		int c = getopt(argc, argv, "d:hlpt:");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 		if (c == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		switch (c) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 		case 'h':
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 		case '?':
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 			usage(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 		case 't':
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 			if (utilfdt_decode_type(optarg, &disp.type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 					&disp.size))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 				usage("Invalid type string");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 		case 'p':
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 			disp.mode = MODE_LIST_PROPS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 			args_per_step = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 		case 'l':
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 			disp.mode = MODE_LIST_SUBNODES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 			args_per_step = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 		case 'd':
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 			disp.default_val = optarg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	if (optind < argc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 		filename = argv[optind++];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	if (!filename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 		usage("Missing filename");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	argv += optind;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	argc -= optind;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	/* Allow no arguments, and silently succeed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	if (!argc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	/* Check for node, property arguments */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	if (args_per_step == 2 && (argc % 2))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		usage("Must have an even number of arguments");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	if (do_fdtget(&disp, filename, argv, argc, args_per_step))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) }