X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=common%2Fcmd_fdt.c;h=e17c3f1d51b83ddc51eb1023e0d87d9a0e79cf12;hb=36ed10cd4b2a0c5891e8460cd8e859b5d3a9b682;hp=3d0c2b772c95cfed8f95196d0d6c511f60a7c57b;hpb=9efac4a1eb99d9c5539aa6992025eeacab7980c6;p=karo-tx-uboot.git diff --git a/common/cmd_fdt.c b/common/cmd_fdt.c index 3d0c2b772c..e17c3f1d51 100644 --- a/common/cmd_fdt.c +++ b/common/cmd_fdt.c @@ -5,23 +5,7 @@ * Pantelis Antoniou and * Matthew McClintock * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA + * SPDX-License-Identifier: GPL-2.0+ */ #include @@ -29,21 +13,25 @@ #include #include #include -#include #include #include +#include #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(void); +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. @@ -52,61 +40,107 @@ struct fdt_header *working_fdt; void set_working_fdt_addr(void *addr) { - char buf[17]; + void *buf; - working_fdt = addr; + buf = map_sysmem((ulong)addr, 0); + working_fdt = buf; + setenv_addr("fdtaddr", addr); +} - sprintf(buf, "%lx", (unsigned long)addr); - setenv("fdtaddr", buf); +/* + * 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. */ -int do_fdt (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) +static int do_fdt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { if (argc < 2) - return cmd_usage(cmdtp); + 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. */ - if (argc == 2) { - if (!fdt_valid()) { + 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 %p\n", working_fdt); + printf("The address of the fdt is %#08lx\n", + control ? (ulong)blob : + getenv_hex("fdtaddr", 0)); return 0; } - addr = simple_strtoul(argv[2], NULL, 16); - set_working_fdt_addr((void *)addr); - - if (!fdt_valid()) { + 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(blob); - if (argc >= 4) { + if (argc >= 2) { int len; int err; /* * Optional new length */ - len = simple_strtoul(argv[3], NULL, 16); - if (len < fdt_totalsize(working_fdt)) { + len = simple_strtoul(argv[1], NULL, 16); + if (len < fdt_totalsize(blob)) { printf ("New length %d < existing length %d, " "ignoring.\n", - len, fdt_totalsize(working_fdt)); + len, fdt_totalsize(blob)); } else { /* * Open in place with a new length. */ - err = fdt_open_into(working_fdt, working_fdt, len); + err = fdt_open_into(blob, blob, len); if (err != 0) { printf ("libfdt fdt_open_into(): %s\n", fdt_strerror(err)); @@ -114,24 +148,34 @@ int do_fdt (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) } } + return CMD_RET_SUCCESS; + } + + if (!working_fdt) { + puts( + "No FDT memory address configured. Please configure\n" + "the FDT address via \"fdt addr
\" command.\n" + "Aborting!\n"); + return CMD_RET_FAILURE; + } + /* * Move the working_fdt */ - } else if (strncmp(argv[1], "mo", 2) == 0) { + if (strncmp(argv[1], "mo", 2) == 0) { struct fdt_header *newaddr; int len; int err; if (argc < 4) - return cmd_usage(cmdtp); + 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()) { + if (!fdt_valid(&working_fdt)) return 1; - } newaddr = (struct fdt_header *)simple_strtoul(argv[3],NULL,16); @@ -175,7 +219,7 @@ int do_fdt (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) * Parameters: Node path, new node to be appended to the path. */ if (argc < 4) - return cmd_usage(cmdtp); + return CMD_RET_USAGE; pathp = argv[2]; nodep = argv[3]; @@ -211,7 +255,7 @@ int do_fdt (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) * Parameters: Node path, property, optional value. */ if (argc < 4) - return cmd_usage(cmdtp); + return CMD_RET_USAGE; pathp = argv[2]; prop = argv[3]; @@ -239,6 +283,114 @@ int do_fdt (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) 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) */ @@ -409,7 +561,7 @@ int do_fdt (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) } } else { /* Unrecognized command */ - return cmd_usage(cmdtp); + return CMD_RET_USAGE; } } #ifdef CONFIG_OF_BOARD_SETUP @@ -422,7 +574,7 @@ int do_fdt (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) unsigned long initrd_start = 0, initrd_end = 0; if ((argc != 2) && (argc != 4)) - return cmd_usage(cmdtp); + return CMD_RET_USAGE; if (argc == 4) { initrd_start = simple_strtoul(argv[2], NULL, 16); @@ -438,7 +590,7 @@ int do_fdt (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) } else { /* Unrecognized command */ - return cmd_usage(cmdtp); + return CMD_RET_USAGE; } return 0; @@ -446,16 +598,23 @@ int do_fdt (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) /****************************************************************************/ -static int fdt_valid(void) +/** + * 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) { - int err; + const void *blob = *blobp; + int err; - if (working_fdt == NULL) { + if (blob == NULL) { printf ("The address of the fdt is invalid (NULL).\n"); return 0; } - err = fdt_check_header(working_fdt); + err = fdt_check_header(blob); if (err == 0) return 1; /* valid */ @@ -465,23 +624,21 @@ static int fdt_valid(void) * Be more informative on bad version. */ if (err == -FDT_ERR_BADVERSION) { - if (fdt_version(working_fdt) < + if (fdt_version(blob) < FDT_FIRST_SUPPORTED_VERSION) { printf (" - too old, fdt %d < %d", - fdt_version(working_fdt), + fdt_version(blob), FDT_FIRST_SUPPORTED_VERSION); - working_fdt = NULL; } - if (fdt_last_comp_version(working_fdt) > + if (fdt_last_comp_version(blob) > FDT_LAST_SUPPORTED_VERSION) { printf (" - too new, fdt %d > %d", - fdt_version(working_fdt), + fdt_version(blob), FDT_LAST_SUPPORTED_VERSION); - working_fdt = NULL; } - return 0; } printf("\n"); + *blobp = NULL; return 0; } return 1; @@ -528,7 +685,7 @@ static int fdt_parse_prop(char * const *newval, int count, char *data, int *len) cp = newp; tmp = simple_strtoul(cp, &newp, 0); - *(uint32_t *)data = __cpu_to_be32(tmp); + *(__be32 *)data = __cpu_to_be32(tmp); data += 4; *len += 4; @@ -600,12 +757,12 @@ static int is_printable_string(const void *data, int len) if (len == 0) return 0; - /* must terminate with zero */ - if (s[len - 1] != '\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)) && (len > 0)) { + 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 @@ -661,19 +818,28 @@ static void print_data(const void *data, int len) } if ((len %4) == 0) { - const u32 *p; - - printf("<"); - for (j = 0, p = data; j < len/4; j ++) - printf("0x%x%s", p[j], j < (len/4 - 1) ? " " : ""); - printf(">"); + 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 */ - const u8 *s; - - printf("["); - for (j = 0, s = data; j < len; j++) - printf("%02x%s", s[j], j < len - 1 ? " " : ""); - printf("]"); + 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("]"); + } } } @@ -801,11 +967,9 @@ static int fdt_print(const char *pathp, char *prop, int depth) } /********************************************************************/ - -U_BOOT_CMD( - fdt, 255, 0, do_fdt, - "flattened device tree utility commands", - "addr [] - Set the fdt location to \n" +#ifdef CONFIG_SYS_LONGHELP +static char fdt_help_text[] = + "addr [-c] [] - Set the [control] fdt location to \n" #ifdef CONFIG_OF_BOARD_SETUP "fdt boardsetup - Do board-specific set up\n" #endif @@ -813,6 +977,10 @@ U_BOOT_CMD( "fdt resize - Resize fdt to size + padding to 4k addr\n" "fdt print [] - Recursive print starting at \n" "fdt list [] - Print one level starting at \n" + "fdt get value - Get and store in \n" + "fdt get name - Get name of node and store in \n" + "fdt get addr - Get start address of and store in \n" + "fdt get size [] - Get size of [] or num nodes and store in \n" "fdt set [] - Set [to ]\n" "fdt mknode - Create a new node after \n" "fdt rm [] - Delete the node or \n" @@ -824,6 +992,11 @@ U_BOOT_CMD( "fdt rsvmem delete - Delete a mem reserves\n" "fdt chosen [ ] - Add/update the /chosen branch in the tree\n" " / - initrd start/end addr\n" - "NOTE: Dereference aliases by omiting the leading '/', " - "e.g. fdt print ethernet0." + "NOTE: Dereference aliases by omitting the leading '/', " + "e.g. fdt print ethernet0."; +#endif + +U_BOOT_CMD( + fdt, 255, 0, do_fdt, + "flattened device tree utility commands", fdt_help_text );