diff options
Diffstat (limited to 'cmd/fdt.c')
| -rw-r--r-- | cmd/fdt.c | 1065 |
1 files changed, 1065 insertions, 0 deletions
diff --git a/cmd/fdt.c b/cmd/fdt.c new file mode 100644 index 0000000..4c18962 --- /dev/null +++ b/cmd/fdt.c @@ -0,0 +1,1065 @@ +/* + * (C) Copyright 2007 + * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com + * Based on code written by: + * Pantelis Antoniou <pantelis.antoniou@gmail.com> and + * Matthew McClintock <msm@freescale.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <command.h> +#include <linux/ctype.h> +#include <linux/types.h> +#include <asm/global_data.h> +#include <libfdt.h> +#include <fdt_support.h> +#include <mapmem.h> +#include <asm/io.h> + +#define MAX_LEVEL 32 /* how deeply nested we will go */ +#define SCRATCHPAD 1024 /* bytes of scratchpad memory */ +#ifndef CONFIG_CMD_FDT_MAX_DUMP +#define CONFIG_CMD_FDT_MAX_DUMP 64 +#endif + +/* + * Global data (for the gd->bd) + */ +DECLARE_GLOBAL_DATA_PTR; + +static int fdt_valid(struct fdt_header **blobp); +static int fdt_parse_prop(char *const*newval, int count, char *data, int *len); +static int fdt_print(const char *pathp, char *prop, int depth); +static int is_printable_string(const void *data, int len); + +/* + * The working_fdt points to our working flattened device tree. + */ +struct fdt_header *working_fdt; + +void set_working_fdt_addr(ulong addr) +{ + void *buf; + + buf = map_sysmem(addr, 0); + working_fdt = buf; + setenv_hex("fdtaddr", addr); +} + +/* + * Get a value from the fdt and format it to be set in the environment + */ +static int fdt_value_setenv(const void *nodep, int len, const char *var) +{ + if (is_printable_string(nodep, len)) + setenv(var, (void *)nodep); + else if (len == 4) { + char buf[11]; + + sprintf(buf, "0x%08X", *(uint32_t *)nodep); + setenv(var, buf); + } else if (len%4 == 0 && len <= 20) { + /* Needed to print things like sha1 hashes. */ + char buf[41]; + int i; + + for (i = 0; i < len; i += sizeof(unsigned int)) + sprintf(buf + (i * 2), "%08x", + *(unsigned int *)(nodep + i)); + setenv(var, buf); + } else { + printf("error: unprintable value\n"); + return 1; + } + return 0; +} + +/* + * Flattened Device Tree command, see the help for parameter definitions. + */ +static int do_fdt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + if (argc < 2) + return CMD_RET_USAGE; + + /* + * Set the address of the fdt + */ + if (argv[1][0] == 'a') { + unsigned long addr; + int control = 0; + struct fdt_header *blob; + /* + * Set the address [and length] of the fdt. + */ + argc -= 2; + argv += 2; +/* Temporary #ifdef - some archs don't have fdt_blob yet */ +#ifdef CONFIG_OF_CONTROL + if (argc && !strcmp(*argv, "-c")) { + control = 1; + argc--; + argv++; + } +#endif + if (argc == 0) { + if (control) + blob = (struct fdt_header *)gd->fdt_blob; + else + blob = working_fdt; + if (!blob || !fdt_valid(&blob)) + return 1; + printf("The address of the fdt is %#08lx\n", + control ? (ulong)map_to_sysmem(blob) : + getenv_hex("fdtaddr", 0)); + return 0; + } + + addr = simple_strtoul(argv[0], NULL, 16); + blob = map_sysmem(addr, 0); + if (!fdt_valid(&blob)) + return 1; + if (control) + gd->fdt_blob = blob; + else + set_working_fdt_addr(addr); + + if (argc >= 2) { + int len; + int err; + /* + * Optional new length + */ + len = simple_strtoul(argv[1], NULL, 16); + if (len < fdt_totalsize(blob)) { + printf ("New length %d < existing length %d, " + "ignoring.\n", + len, fdt_totalsize(blob)); + } else { + /* + * Open in place with a new length. + */ + err = fdt_open_into(blob, blob, len); + if (err != 0) { + printf ("libfdt fdt_open_into(): %s\n", + fdt_strerror(err)); + } + } + } + + return CMD_RET_SUCCESS; + } + + if (!working_fdt) { + puts( + "No FDT memory address configured. Please configure\n" + "the FDT address via \"fdt addr <address>\" command.\n" + "Aborting!\n"); + return CMD_RET_FAILURE; + } + + /* + * Move the working_fdt + */ + if (strncmp(argv[1], "mo", 2) == 0) { + struct fdt_header *newaddr; + int len; + int err; + + if (argc < 4) + return CMD_RET_USAGE; + + /* + * Set the address and length of the fdt. + */ + working_fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16); + if (!fdt_valid(&working_fdt)) + return 1; + + newaddr = (struct fdt_header *)simple_strtoul(argv[3],NULL,16); + + /* + * If the user specifies a length, use that. Otherwise use the + * current length. + */ + if (argc <= 4) { + len = fdt_totalsize(working_fdt); + } else { + len = simple_strtoul(argv[4], NULL, 16); + if (len < fdt_totalsize(working_fdt)) { + printf ("New length 0x%X < existing length " + "0x%X, aborting.\n", + len, fdt_totalsize(working_fdt)); + return 1; + } + } + + /* + * Copy to the new location. + */ + err = fdt_open_into(working_fdt, newaddr, len); + if (err != 0) { + printf ("libfdt fdt_open_into(): %s\n", + fdt_strerror(err)); + return 1; + } + working_fdt = newaddr; + + /* + * Make a new node + */ + } else if (strncmp(argv[1], "mk", 2) == 0) { + char *pathp; /* path */ + char *nodep; /* new node to add */ + int nodeoffset; /* node offset from libfdt */ + int err; + + /* + * Parameters: Node path, new node to be appended to the path. + */ + if (argc < 4) + return CMD_RET_USAGE; + + pathp = argv[2]; + nodep = argv[3]; + + nodeoffset = fdt_path_offset (working_fdt, pathp); + if (nodeoffset < 0) { + /* + * Not found or something else bad happened. + */ + printf ("libfdt fdt_path_offset() returned %s\n", + fdt_strerror(nodeoffset)); + return 1; + } + err = fdt_add_subnode(working_fdt, nodeoffset, nodep); + if (err < 0) { + printf ("libfdt fdt_add_subnode(): %s\n", + fdt_strerror(err)); + return 1; + } + + /* + * Set the value of a property in the working_fdt. + */ + } else if (argv[1][0] == 's') { + char *pathp; /* path */ + char *prop; /* property */ + int nodeoffset; /* node offset from libfdt */ + static char data[SCRATCHPAD]; /* storage for the property */ + int len; /* new length of the property */ + int ret; /* return value */ + + /* + * Parameters: Node path, property, optional value. + */ + if (argc < 4) + return CMD_RET_USAGE; + + pathp = argv[2]; + prop = argv[3]; + if (argc == 4) { + len = 0; + } else { + ret = fdt_parse_prop(&argv[4], argc - 4, data, &len); + if (ret != 0) + return ret; + } + + nodeoffset = fdt_path_offset (working_fdt, pathp); + if (nodeoffset < 0) { + /* + * Not found or something else bad happened. + */ + printf ("libfdt fdt_path_offset() returned %s\n", + fdt_strerror(nodeoffset)); + return 1; + } + + ret = fdt_setprop(working_fdt, nodeoffset, prop, data, len); + if (ret < 0) { + printf ("libfdt fdt_setprop(): %s\n", fdt_strerror(ret)); + return 1; + } + + /******************************************************************** + * Get the value of a property in the working_fdt. + ********************************************************************/ + } else if (argv[1][0] == 'g') { + char *subcmd; /* sub-command */ + char *pathp; /* path */ + char *prop; /* property */ + char *var; /* variable to store result */ + int nodeoffset; /* node offset from libfdt */ + const void *nodep; /* property node pointer */ + int len = 0; /* new length of the property */ + + /* + * Parameters: Node path, property, optional value. + */ + if (argc < 5) + return CMD_RET_USAGE; + + subcmd = argv[2]; + + if (argc < 6 && subcmd[0] != 's') + return CMD_RET_USAGE; + + var = argv[3]; + pathp = argv[4]; + prop = argv[5]; + + nodeoffset = fdt_path_offset(working_fdt, pathp); + if (nodeoffset < 0) { + /* + * Not found or something else bad happened. + */ + printf("libfdt fdt_path_offset() returned %s\n", + fdt_strerror(nodeoffset)); + return 1; + } + + if (subcmd[0] == 'n' || (subcmd[0] == 's' && argc == 5)) { + int reqIndex = -1; + int startDepth = fdt_node_depth( + working_fdt, nodeoffset); + int curDepth = startDepth; + int curIndex = -1; + int nextNodeOffset = fdt_next_node( + working_fdt, nodeoffset, &curDepth); + + if (subcmd[0] == 'n') + reqIndex = simple_strtoul(argv[5], NULL, 16); + + while (curDepth > startDepth) { + if (curDepth == startDepth + 1) + curIndex++; + if (subcmd[0] == 'n' && curIndex == reqIndex) { + const char *nodeName = fdt_get_name( + working_fdt, nextNodeOffset, NULL); + + setenv(var, (char *)nodeName); + return 0; + } + nextNodeOffset = fdt_next_node( + working_fdt, nextNodeOffset, &curDepth); + if (nextNodeOffset < 0) + break; + } + if (subcmd[0] == 's') { + /* get the num nodes at this level */ + setenv_ulong(var, curIndex + 1); + } else { + /* node index not found */ + printf("libfdt node not found\n"); + return 1; + } + } else { + nodep = fdt_getprop( + working_fdt, nodeoffset, prop, &len); + if (len == 0) { + /* no property value */ + setenv(var, ""); + return 0; + } else if (len > 0) { + if (subcmd[0] == 'v') { + int ret; + + ret = fdt_value_setenv(nodep, len, var); + if (ret != 0) + return ret; + } else if (subcmd[0] == 'a') { + /* Get address */ + char buf[11]; + + sprintf(buf, "0x%p", nodep); + setenv(var, buf); + } else if (subcmd[0] == 's') { + /* Get size */ + char buf[11]; + + sprintf(buf, "0x%08X", len); + setenv(var, buf); + } else + return CMD_RET_USAGE; + return 0; + } else { + printf("libfdt fdt_getprop(): %s\n", + fdt_strerror(len)); + return 1; + } + } + + /* + * Print (recursive) / List (single level) + */ + } else if ((argv[1][0] == 'p') || (argv[1][0] == 'l')) { + int depth = MAX_LEVEL; /* how deep to print */ + char *pathp; /* path */ + char *prop; /* property */ + int ret; /* return value */ + static char root[2] = "/"; + + /* + * list is an alias for print, but limited to 1 level + */ + if (argv[1][0] == 'l') { + depth = 1; + } + + /* + * Get the starting path. The root node is an oddball, + * the offset is zero and has no name. + */ + if (argc == 2) + pathp = root; + else + pathp = argv[2]; + if (argc > 3) + prop = argv[3]; + else + prop = NULL; + + ret = fdt_print(pathp, prop, depth); + if (ret != 0) + return ret; + + /* + * Remove a property/node + */ + } else if (strncmp(argv[1], "rm", 2) == 0) { + int nodeoffset; /* node offset from libfdt */ + int err; + + /* + * Get the path. The root node is an oddball, the offset + * is zero and has no name. + */ + nodeoffset = fdt_path_offset (working_fdt, argv[2]); + if (nodeoffset < 0) { + /* + * Not found or something else bad happened. + */ + printf ("libfdt fdt_path_offset() returned %s\n", + fdt_strerror(nodeoffset)); + return 1; + } + /* + * Do the delete. A fourth parameter means delete a property, + * otherwise delete the node. + */ + if (argc > 3) { + err = fdt_delprop(working_fdt, nodeoffset, argv[3]); + if (err < 0) { + printf("libfdt fdt_delprop(): %s\n", + fdt_strerror(err)); + return err; + } + } else { + err = fdt_del_node(working_fdt, nodeoffset); + if (err < 0) { + printf("libfdt fdt_del_node(): %s\n", + fdt_strerror(err)); + return err; + } + } + + /* + * Display header info + */ + } else if (argv[1][0] == 'h') { + u32 version = fdt_version(working_fdt); + printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt)); + printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt), + fdt_totalsize(working_fdt)); + printf("off_dt_struct:\t\t0x%x\n", + fdt_off_dt_struct(working_fdt)); + printf("off_dt_strings:\t\t0x%x\n", + fdt_off_dt_strings(working_fdt)); + printf("off_mem_rsvmap:\t\t0x%x\n", + fdt_off_mem_rsvmap(working_fdt)); + printf("version:\t\t%d\n", version); + printf("last_comp_version:\t%d\n", + fdt_last_comp_version(working_fdt)); + if (version >= 2) + printf("boot_cpuid_phys:\t0x%x\n", + fdt_boot_cpuid_phys(working_fdt)); + if (version >= 3) + printf("size_dt_strings:\t0x%x\n", + fdt_size_dt_strings(working_fdt)); + if (version >= 17) + printf("size_dt_struct:\t\t0x%x\n", + fdt_size_dt_struct(working_fdt)); + printf("number mem_rsv:\t\t0x%x\n", + fdt_num_mem_rsv(working_fdt)); + printf("\n"); + + /* + * Set boot cpu id + */ + } else if (strncmp(argv[1], "boo", 3) == 0) { + unsigned long tmp = simple_strtoul(argv[2], NULL, 16); + fdt_set_boot_cpuid_phys(working_fdt, tmp); + + /* + * memory command + */ + } else if (strncmp(argv[1], "me", 2) == 0) { + uint64_t addr, size; + int err; + addr = simple_strtoull(argv[2], NULL, 16); + size = simple_strtoull(argv[3], NULL, 16); + err = fdt_fixup_memory(working_fdt, addr, size); + if (err < 0) + return err; + + /* + * mem reserve commands + */ + } else if (strncmp(argv[1], "rs", 2) == 0) { + if (argv[2][0] == 'p') { + uint64_t addr, size; + int total = fdt_num_mem_rsv(working_fdt); + int j, err; + printf("index\t\t start\t\t size\n"); + printf("-------------------------------" + "-----------------\n"); + for (j = 0; j < total; j++) { + err = fdt_get_mem_rsv(working_fdt, j, &addr, &size); + if (err < 0) { + printf("libfdt fdt_get_mem_rsv(): %s\n", + fdt_strerror(err)); + return err; + } + printf(" %x\t%08x%08x\t%08x%08x\n", j, + (u32)(addr >> 32), + (u32)(addr & 0xffffffff), + (u32)(size >> 32), + (u32)(size & 0xffffffff)); + } + } else if (argv[2][0] == 'a') { + uint64_t addr, size; + int err; + addr = simple_strtoull(argv[3], NULL, 16); + size = simple_strtoull(argv[4], NULL, 16); + err = fdt_add_mem_rsv(working_fdt, addr, size); + + if (err < 0) { + printf("libfdt fdt_add_mem_rsv(): %s\n", + fdt_strerror(err)); + return err; + } + } else if (argv[2][0] == 'd') { + unsigned long idx = simple_strtoul(argv[3], NULL, 16); + int err = fdt_del_mem_rsv(working_fdt, idx); + + if (err < 0) { + printf("libfdt fdt_del_mem_rsv(): %s\n", + fdt_strerror(err)); + return err; + } + } else { + /* Unrecognized command */ + return CMD_RET_USAGE; + } + } +#ifdef CONFIG_OF_BOARD_SETUP + /* Call the board-specific fixup routine */ + else if (strncmp(argv[1], "boa", 3) == 0) { + int err = ft_board_setup(working_fdt, gd->bd); + + if (err) { + printf("Failed to update board information in FDT: %s\n", + fdt_strerror(err)); + return CMD_RET_FAILURE; + } + } +#endif +#ifdef CONFIG_OF_SYSTEM_SETUP + /* Call the board-specific fixup routine */ + else if (strncmp(argv[1], "sys", 3) == 0) { + int err = ft_system_setup(working_fdt, gd->bd); + + if (err) { + printf("Failed to add system information to FDT: %s\n", + fdt_strerror(err)); + return CMD_RET_FAILURE; + } + } +#endif + /* Create a chosen node */ + else if (strncmp(argv[1], "cho", 3) == 0) { + unsigned long initrd_start = 0, initrd_end = 0; + + if ((argc != 2) && (argc != 4)) + return CMD_RET_USAGE; + + if (argc == 4) { + initrd_start = simple_strtoul(argv[2], NULL, 16); + initrd_end = simple_strtoul(argv[3], NULL, 16); + } + + fdt_chosen(working_fdt); + fdt_initrd(working_fdt, initrd_start, initrd_end); + +#if defined(CONFIG_FIT_SIGNATURE) + } else if (strncmp(argv[1], "che", 3) == 0) { + int cfg_noffset; + int ret; + unsigned long addr; + struct fdt_header *blob; + + if (!working_fdt) + return CMD_RET_FAILURE; + + if (argc > 2) { + addr = simple_strtoul(argv[2], NULL, 16); + blob = map_sysmem(addr, 0); + } else { + blob = (struct fdt_header *)gd->fdt_blob; + } + if (!fdt_valid(&blob)) + return 1; + + gd->fdt_blob = blob; + cfg_noffset = fit_conf_get_node(working_fdt, NULL); + if (!cfg_noffset) { + printf("Could not find configuration node: %s\n", + fdt_strerror(cfg_noffset)); + return CMD_RET_FAILURE; + } + + ret = fit_config_verify(working_fdt, cfg_noffset); + if (ret == 0) + return CMD_RET_SUCCESS; + else + return CMD_RET_FAILURE; +#endif + + } + /* resize the fdt */ + else if (strncmp(argv[1], "re", 2) == 0) { + fdt_shrink_to_minimum(working_fdt); + } + else { + /* Unrecognized command */ + return CMD_RET_USAGE; + } + + return 0; +} + +/****************************************************************************/ + +/** + * fdt_valid() - Check if an FDT is valid. If not, change it to NULL + * + * @blobp: Pointer to FDT pointer + * @return 1 if OK, 0 if bad (in which case *blobp is set to NULL) + */ +static int fdt_valid(struct fdt_header **blobp) +{ + const void *blob = *blobp; + int err; + + if (blob == NULL) { + printf ("The address of the fdt is invalid (NULL).\n"); + return 0; + } + + err = fdt_check_header(blob); + if (err == 0) + return 1; /* valid */ + + if (err < 0) { + printf("libfdt fdt_check_header(): %s", fdt_strerror(err)); + /* + * Be more informative on bad version. + */ + if (err == -FDT_ERR_BADVERSION) { + if (fdt_version(blob) < + FDT_FIRST_SUPPORTED_VERSION) { + printf (" - too old, fdt %d < %d", + fdt_version(blob), + FDT_FIRST_SUPPORTED_VERSION); + } + if (fdt_last_comp_version(blob) > + FDT_LAST_SUPPORTED_VERSION) { + printf (" - too new, fdt %d > %d", + fdt_version(blob), + FDT_LAST_SUPPORTED_VERSION); + } + } + printf("\n"); + *blobp = NULL; + return 0; + } + return 1; +} + +/****************************************************************************/ + +/* + * Parse the user's input, partially heuristic. Valid formats: + * <0x00112233 4 05> - an array of cells. Numbers follow standard + * C conventions. + * [00 11 22 .. nn] - byte stream + * "string" - If the the value doesn't start with "<" or "[", it is + * treated as a string. Note that the quotes are + * stripped by the parser before we get the string. + * newval: An array of strings containing the new property as specified + * on the command line + * count: The number of strings in the array + * data: A bytestream to be placed in the property + * len: The length of the resulting bytestream + */ +static int fdt_parse_prop(char * const *newval, int count, char *data, int *len) +{ + char *cp; /* temporary char pointer */ + char *newp; /* temporary newval char pointer */ + unsigned long tmp; /* holds converted values */ + int stridx = 0; + + *len = 0; + newp = newval[0]; + + /* An array of cells */ + if (*newp == '<') { + newp++; + while ((*newp != '>') && (stridx < count)) { + /* + * Keep searching until we find that last ">" + * That way users don't have to escape the spaces + */ + if (*newp == '\0') { + newp = newval[++stridx]; + continue; + } + + cp = newp; + tmp = simple_strtoul(cp, &newp, 0); + *(__be32 *)data = __cpu_to_be32(tmp); + data += 4; + *len += 4; + + /* If the ptr didn't advance, something went wrong */ + if ((newp - cp) <= 0) { + printf("Sorry, I could not convert \"%s\"\n", + cp); + return 1; + } + + while (*newp == ' ') + newp++; + } + + if (*newp != '>') { + printf("Unexpected character '%c'\n", *newp); + return 1; + } + } else if (*newp == '[') { + /* + * Byte stream. Convert the values. + */ + newp++; + while ((stridx < count) && (*newp != ']')) { + while (*newp == ' ') + newp++; + if (*newp == '\0') { + newp = newval[++stridx]; + continue; + } + if (!isxdigit(*newp)) + break; + tmp = simple_strtoul(newp, &newp, 16); + *data++ = tmp & 0xFF; + *len = *len + 1; + } + if (*newp != ']') { + printf("Unexpected character '%c'\n", *newp); + return 1; + } + } else { + /* + * Assume it is one or more strings. Copy it into our + * data area for convenience (including the + * terminating '\0's). + */ + while (stridx < count) { + size_t length = strlen(newp) + 1; + strcpy(data, newp); + data += length; + *len += length; + newp = newval[++stridx]; + } + } + return 0; +} + +/****************************************************************************/ + +/* + * Heuristic to guess if this is a string or concatenated strings. + */ + +static int is_printable_string(const void *data, int len) +{ + const char *s = data; + + /* zero length is not */ + if (len == 0) + return 0; + + /* must terminate with zero or '\n' */ + if (s[len - 1] != '\0' && s[len - 1] != '\n') + return 0; + + /* printable or a null byte (concatenated strings) */ + while (((*s == '\0') || isprint(*s) || isspace(*s)) && (len > 0)) { + /* + * If we see a null, there are three possibilities: + * 1) If len == 1, it is the end of the string, printable + * 2) Next character also a null, not printable. + * 3) Next character not a null, continue to check. + */ + if (s[0] == '\0') { + if (len == 1) + return 1; + if (s[1] == '\0') + return 0; + } + s++; + len--; + } + + /* Not the null termination, or not done yet: not printable */ + if (*s != '\0' || (len != 0)) + return 0; + + return 1; +} + + +/* + * Print the property in the best format, a heuristic guess. Print as + * a string, concatenated strings, a byte, word, double word, or (if all + * else fails) it is printed as a stream of bytes. + */ +static void print_data(const void *data, int len) +{ + int j; + + /* no data, don't print */ + if (len == 0) + return; + + /* + * It is a string, but it may have multiple strings (embedded '\0's). + */ + if (is_printable_string(data, len)) { + puts("\""); + j = 0; + while (j < len) { + if (j > 0) + puts("\", \""); + puts(data); + j += strlen(data) + 1; + data += strlen(data) + 1; + } + puts("\""); + return; + } + + if ((len %4) == 0) { + if (len > CONFIG_CMD_FDT_MAX_DUMP) + printf("* 0x%p [0x%08x]", data, len); + else { + const __be32 *p; + + printf("<"); + for (j = 0, p = data; j < len/4; j++) + printf("0x%08x%s", fdt32_to_cpu(p[j]), + j < (len/4 - 1) ? " " : ""); + printf(">"); + } + } else { /* anything else... hexdump */ + if (len > CONFIG_CMD_FDT_MAX_DUMP) + printf("* 0x%p [0x%08x]", data, len); + else { + const u8 *s; + + printf("["); + for (j = 0, s = data; j < len; j++) + printf("%02x%s", s[j], j < len - 1 ? " " : ""); + printf("]"); + } + } +} + +/****************************************************************************/ + +/* + * Recursively print (a portion of) the working_fdt. The depth parameter + * determines how deeply nested the fdt is printed. + */ +static int fdt_print(const char *pathp, char *prop, int depth) +{ + static char tabs[MAX_LEVEL+1] = + "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t" + "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"; + const void *nodep; /* property node pointer */ + int nodeoffset; /* node offset from libfdt */ + int nextoffset; /* next node offset from libfdt */ + uint32_t tag; /* tag */ + int len; /* length of the property */ + int level = 0; /* keep track of nesting level */ + const struct fdt_property *fdt_prop; + + nodeoffset = fdt_path_offset (working_fdt, pathp); + if (nodeoffset < 0) { + /* + * Not found or something else bad happened. + */ + printf ("libfdt fdt_path_offset() returned %s\n", + fdt_strerror(nodeoffset)); + return 1; + } + /* + * The user passed in a property as well as node path. + * Print only the given property and then return. + */ + if (prop) { + nodep = fdt_getprop (working_fdt, nodeoffset, prop, &len); + if (len == 0) { + /* no property value */ + printf("%s %s\n", pathp, prop); + return 0; + } else if (len > 0) { + printf("%s = ", prop); + print_data (nodep, len); + printf("\n"); + return 0; + } else { + printf ("libfdt fdt_getprop(): %s\n", + fdt_strerror(len)); + return 1; + } + } + + /* + * The user passed in a node path and no property, + * print the node and all subnodes. + */ + while(level >= 0) { + tag = fdt_next_tag(working_fdt, nodeoffset, &nextoffset); + switch(tag) { + case FDT_BEGIN_NODE: + pathp = fdt_get_name(working_fdt, nodeoffset, NULL); + if (level <= depth) { + if (pathp == NULL) + pathp = "/* NULL pointer error */"; + if (*pathp == '\0') + pathp = "/"; /* root is nameless */ + printf("%s%s {\n", + &tabs[MAX_LEVEL - level], pathp); + } + level++; + if (level >= MAX_LEVEL) { + printf("Nested too deep, aborting.\n"); + return 1; + } + break; + case FDT_END_NODE: + level--; + if (level <= depth) + printf("%s};\n", &tabs[MAX_LEVEL - level]); + if (level == 0) { + level = -1; /* exit the loop */ + } + break; + case FDT_PROP: + fdt_prop = fdt_offset_ptr(working_fdt, nodeoffset, + sizeof(*fdt_prop)); + pathp = fdt_string(working_fdt, + fdt32_to_cpu(fdt_prop->nameoff)); + len = fdt32_to_cpu(fdt_prop->len); + nodep = fdt_prop->data; + if (len < 0) { + printf ("libfdt fdt_getprop(): %s\n", + fdt_strerror(len)); + return 1; + } else if (len == 0) { + /* the property has no value */ + if (level <= depth) + printf("%s%s;\n", + &tabs[MAX_LEVEL - level], + pathp); + } else { + if (level <= depth) { + printf("%s%s = ", + &tabs[MAX_LEVEL - level], + pathp); + print_data (nodep, len); + printf(";\n"); + } + } + break; + case FDT_NOP: + printf("%s/* NOP */\n", &tabs[MAX_LEVEL - level]); + break; + case FDT_END: + return 1; + default: + if (level <= depth) + printf("Unknown tag 0x%08X\n", tag); + return 1; + } + nodeoffset = nextoffset; + } + return 0; +} + +/********************************************************************/ +#ifdef CONFIG_SYS_LONGHELP +static char fdt_help_text[] = + "addr [-c] <addr> [<length>] - Set the [control] fdt location to <addr>\n" +#ifdef CONFIG_OF_BOARD_SETUP + "fdt boardsetup - Do board-specific set up\n" +#endif +#ifdef CONFIG_OF_SYSTEM_SETUP + "fdt systemsetup - Do system-specific set up\n" +#endif + "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr> and make it active\n" + "fdt resize - Resize fdt to size + padding to 4k addr\n" + "fdt print <path> [<prop>] - Recursive print starting at <path>\n" + "fdt list <path> [<prop>] - Print one level starting at <path>\n" + "fdt get value <var> <path> <prop> - Get <property> and store in <var>\n" + "fdt get name <var> <path> <index> - Get name of node <index> and store in <var>\n" + "fdt get addr <var> <path> <prop> - Get start address of <property> and store in <var>\n" + "fdt get size <var> <path> [<prop>] - Get size of [<property>] or num nodes and store in <var>\n" + "fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n" + "fdt mknode <path> <node> - Create a new node after <path>\n" + "fdt rm <path> [<prop>] - Delete the node or <property>\n" + "fdt header - Display header info\n" + "fdt bootcpu <id> - Set boot cpuid\n" + "fdt memory <addr> <size> - Add/Update memory node\n" + "fdt rsvmem print - Show current mem reserves\n" + "fdt rsvmem add <addr> <size> - Add a mem reserve\n" + "fdt rsvmem delete <index> - Delete a mem reserves\n" + "fdt chosen [<start> <end>] - Add/update the /chosen branch in the tree\n" + " <start>/<end> - initrd start/end addr\n" +#if defined(CONFIG_FIT_SIGNATURE) + "fdt checksign [<addr>] - check FIT signature\n" + " <start> - addr of key blob\n" + " default gd->fdt_blob\n" +#endif + "NOTE: Dereference aliases by omiting the leading '/', " + "e.g. fdt print ethernet0."; +#endif + +U_BOOT_CMD( + fdt, 255, 0, do_fdt, + "flattened device tree utility commands", fdt_help_text +); |