summaryrefslogtreecommitdiff
path: root/common/cmd_fdt.c
diff options
context:
space:
mode:
Diffstat (limited to 'common/cmd_fdt.c')
-rw-r--r--common/cmd_fdt.c635
1 files changed, 635 insertions, 0 deletions
diff --git a/common/cmd_fdt.c b/common/cmd_fdt.c
new file mode 100644
index 0000000..08fe351
--- /dev/null
+++ b/common/cmd_fdt.c
@@ -0,0 +1,635 @@
+/*
+ * (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>
+ *
+ * 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
+ */
+
+#include <common.h>
+#include <command.h>
+#include <linux/ctype.h>
+#include <linux/types.h>
+
+#ifdef CONFIG_OF_LIBFDT
+
+#include <asm/global_data.h>
+#include <fdt.h>
+#include <libfdt.h>
+#include <fdt_support.h>
+
+#define MAX_LEVEL 32 /* how deeply nested we will go */
+#define SCRATCHPAD 1024 /* bytes of scratchpad memory */
+
+/*
+ * Global data (for the gd->bd)
+ */
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * Scratchpad memory.
+ */
+static char data[SCRATCHPAD];
+
+
+/*
+ * Function prototypes/declarations.
+ */
+static int fdt_valid(void);
+static void print_data(const void *data, int len);
+
+
+/*
+ * Flattened Device Tree command, see the help for parameter definitions.
+ */
+int do_fdt (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+ char op;
+
+ if (argc < 2) {
+ printf ("Usage:\n%s\n", cmdtp->usage);
+ return 1;
+ }
+
+ /*
+ * Figure out which subcommand was given
+ */
+ op = argv[1][0];
+ /********************************************************************
+ * Set the address of the fdt
+ ********************************************************************/
+ if (op == 'a') {
+ /*
+ * Set the address [and length] of the fdt.
+ */
+ fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
+
+ if (!fdt_valid()) {
+ return 1;
+ }
+
+ if (argc >= 4) {
+ int len;
+ int err;
+ /*
+ * Optional new length
+ */
+ len = simple_strtoul(argv[3], NULL, 16);
+ if (len < fdt_totalsize(fdt)) {
+ printf ("New length %d < existing length %d, ignoring.\n",
+ len, fdt_totalsize(fdt));
+ } else {
+ /*
+ * Open in place with a new length.
+ */
+ err = fdt_open_into(fdt, fdt, len);
+ if (err != 0) {
+ printf ("libfdt: %s\n", fdt_strerror(err));
+ }
+ }
+ }
+
+ /********************************************************************
+ * Move the fdt
+ ********************************************************************/
+ } else if (op == 'm') {
+ struct fdt_header *newaddr;
+ int len;
+ int err;
+
+ if (argc != 5) {
+ printf ("Usage:\n%s\n", cmdtp->usage);
+ return 1;
+ }
+
+ /*
+ * Set the address and length of the fdt.
+ */
+ fdt = (struct fdt_header *)simple_strtoul(argv[2], NULL, 16);
+ if (!fdt_valid()) {
+ return 1;
+ }
+
+ newaddr = (struct fdt_header *)simple_strtoul(argv[3], NULL, 16);
+ len = simple_strtoul(argv[4], NULL, 16);
+ if (len < fdt_totalsize(fdt)) {
+ printf ("New length %d < existing length %d, aborting.\n",
+ len, fdt_totalsize(fdt));
+ return 1;
+ }
+
+ /*
+ * Copy to the new location.
+ */
+ err = fdt_open_into(fdt, newaddr, len);
+ if (err != 0) {
+ printf ("libfdt: %s\n", fdt_strerror(err));
+ return 1;
+ }
+ fdt = newaddr;
+
+ /********************************************************************
+ * Set the value of a node in the fdt.
+ ********************************************************************/
+ } else if (op == 's') {
+ char *pathp; /* path */
+ char *prop; /* property */
+ struct fdt_property *nodep; /* node struct pointer */
+ char *newval; /* value from the user (as a string) */
+ char *vp; /* temporary value pointer */
+ char *cp; /* temporary char pointer */
+ int nodeoffset; /* node offset from libfdt */
+ int len; /* new length of the property */
+ int oldlen; /* original length of the property */
+ unsigned long tmp; /* holds converted values */
+ int ret; /* return value */
+
+ /*
+ * Parameters: Node path, property, value.
+ */
+ if (argc < 5) {
+ printf ("Usage:\n%s\n", cmdtp->usage);
+ return 1;
+ }
+
+ pathp = argv[2];
+ prop = argv[3];
+ newval = argv[4];
+
+ if (strcmp(pathp, "/") == 0) {
+ nodeoffset = 0;
+ } else {
+ nodeoffset = fdt_path_offset (fdt, pathp);
+ if (nodeoffset < 0) {
+ /*
+ * Not found or something else bad happened.
+ */
+ printf ("libfdt: %s\n", fdt_strerror(nodeoffset));
+ return 1;
+ }
+ }
+ nodep = fdt_getprop (fdt, nodeoffset, prop, &oldlen);
+ if (oldlen < 0) {
+ printf ("libfdt %s\n", fdt_strerror(oldlen));
+ return 1;
+ } else if (oldlen == 0) {
+ /*
+ * The specified property has no value
+ */
+ printf("%s has no value, cannot set one (yet).\n", prop);
+ return 1;
+ } else {
+ /*
+ * Convert the new property
+ */
+ vp = data;
+ if (*newval == '<') {
+ /*
+ * Bigger values than bytes.
+ */
+ len = 0;
+ newval++;
+ while ((*newval != '>') && (*newval != '\0')) {
+ cp = newval;
+ tmp = simple_strtoul(cp, &newval, 16);
+ if ((newval - cp) <= 2) {
+ *vp = tmp & 0xFF;
+ vp += 1;
+ len += 1;
+ } else if ((newval - cp) <= 4) {
+ *(uint16_t *)vp = __cpu_to_be16(tmp);
+ vp += 2;
+ len += 2;
+ } else if ((newval - cp) <= 8) {
+ *(uint32_t *)vp = __cpu_to_be32(tmp);
+ vp += 4;
+ len += 4;
+ } else {
+ printf("Sorry, I could not convert \"%s\"\n", cp);
+ return 1;
+ }
+ while (*newval == ' ')
+ newval++;
+ }
+ if (*newval != '>') {
+ printf("Unexpected character '%c'\n", *newval);
+ return 1;
+ }
+ } else if (*newval == '[') {
+ /*
+ * Byte stream. Convert the values.
+ */
+ len = 0;
+ newval++;
+ while ((*newval != ']') && (*newval != '\0')) {
+ tmp = simple_strtoul(newval, &newval, 16);
+ *vp++ = tmp & 0xFF;
+ len++;
+ while (*newval == ' ')
+ newval++;
+ }
+ if (*newval != ']') {
+ printf("Unexpected character '%c'\n", *newval);
+ return 1;
+ }
+ } else {
+ /*
+ * Assume it is a string. Copy it into our data area for
+ * convenience (including the terminating '\0').
+ */
+ len = strlen(newval) + 1;
+ strcpy(data, newval);
+ }
+
+ ret = fdt_setprop(fdt, nodeoffset, prop, data, len);
+ if (ret < 0) {
+ printf ("libfdt %s\n", fdt_strerror(ret));
+ return 1;
+ }
+ }
+
+ /********************************************************************
+ * Print (recursive) / List (single level)
+ ********************************************************************/
+ } else if ((op == 'p') || (op == 'l')) {
+ /*
+ * Recursively print (a portion of) the fdt.
+ */
+ static int offstack[MAX_LEVEL];
+ 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";
+ int depth = MAX_LEVEL; /* how deep to print */
+ char *pathp; /* path */
+ char *prop; /* property */
+ 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 */
+
+ /*
+ * list is an alias for print, but limited to 1 level
+ */
+ if (op == 'l') {
+ depth = 1;
+ }
+
+ /*
+ * Get the starting path. The root node is an oddball,
+ * the offset is zero and has no name.
+ */
+ pathp = argv[2];
+ if (argc > 3)
+ prop = argv[3];
+ else
+ prop = NULL;
+
+ if (strcmp(pathp, "/") == 0) {
+ nodeoffset = 0;
+ printf("/");
+ } else {
+ nodeoffset = fdt_path_offset (fdt, pathp);
+ if (nodeoffset < 0) {
+ /*
+ * Not found or something else bad happened.
+ */
+ printf ("libfdt %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 (fdt, nodeoffset, prop, &len);
+ if (len == 0) {
+ printf("%s %s\n", pathp, prop); /* no property value */
+ return 0;
+ } else if (len > 0) {
+ printf("%s=", prop);
+ print_data (nodep, len);
+ printf("\n");
+ return 0;
+ } else {
+ printf ("libfdt %s\n", fdt_strerror(len));
+ return 1;
+ }
+ }
+
+ /*
+ * The user passed in a node path and no property, print the node
+ * and all subnodes.
+ */
+ offstack[0] = nodeoffset;
+
+ while(level >= 0) {
+ tag = fdt_next_tag(fdt, nodeoffset, &nextoffset, &pathp);
+ switch(tag) {
+ case FDT_BEGIN_NODE:
+ if(level <= depth)
+ printf("%s%s {\n", &tabs[MAX_LEVEL - level], pathp);
+ level++;
+ offstack[level] = nodeoffset;
+ if (level >= MAX_LEVEL) {
+ printf("Aaaiii <splat> nested too deep.\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:
+ nodep = fdt_getprop (fdt, offstack[level], pathp, &len);
+ if (len < 0) {
+ printf ("libfdt %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:
+ break;
+ case FDT_END:
+ return 1;
+ default:
+ if(level <= depth)
+ printf("Unknown tag 0x%08X\n", tag);
+ return 1;
+ }
+ nodeoffset = nextoffset;
+ }
+
+ /********************************************************************
+ * Remove a property/node
+ ********************************************************************/
+ } else if (op == 'r') {
+ 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.
+ */
+ if (strcmp(argv[2], "/") == 0) {
+ nodeoffset = 0;
+ } else {
+ nodeoffset = fdt_path_offset (fdt, argv[2]);
+ if (nodeoffset < 0) {
+ /*
+ * Not found or something else bad happened.
+ */
+ printf ("libfdt %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(fdt, nodeoffset, argv[3]);
+ if (err < 0) {
+ printf("fdt_delprop libfdt: %s\n", fdt_strerror(err));
+ return err;
+ }
+ } else {
+ err = fdt_del_node(fdt, nodeoffset);
+ if (err < 0) {
+ printf("fdt_del_node libfdt: %s\n", fdt_strerror(err));
+ return err;
+ }
+ }
+
+ /********************************************************************
+ * Create a chosen node
+ ********************************************************************/
+ } else if (op == 'c') {
+ fdt_chosen(fdt, 0, 0, 1);
+
+ /********************************************************************
+ * Create a u-boot-env node
+ ********************************************************************/
+ } else if (op == 'e') {
+ fdt_env(fdt);
+
+ /********************************************************************
+ * Create a bd_t node
+ ********************************************************************/
+ } else if (op == 'b') {
+ fdt_bd_t(fdt);
+
+ /********************************************************************
+ * Unrecognized command
+ ********************************************************************/
+ } else {
+ printf ("Usage:\n%s\n", cmdtp->usage);
+ return 1;
+ }
+
+ return 0;
+}
+
+/********************************************************************/
+
+static int fdt_valid(void)
+{
+ int err;
+
+ if (fdt == NULL) {
+ printf ("The address of the fdt is invalid (NULL).\n");
+ return 0;
+ }
+
+ err = fdt_check_header(fdt);
+ if (err == 0)
+ return 1; /* valid */
+
+ if (err < 0) {
+ printf("libfdt: %s", fdt_strerror(err));
+ /*
+ * Be more informative on bad version.
+ */
+ if (err == -FDT_ERR_BADVERSION) {
+ if (fdt_version(fdt) < FDT_FIRST_SUPPORTED_VERSION) {
+ printf (" - too old, fdt $d < %d",
+ fdt_version(fdt), FDT_FIRST_SUPPORTED_VERSION);
+ fdt = NULL;
+ }
+ if (fdt_last_comp_version(fdt) > FDT_LAST_SUPPORTED_VERSION) {
+ printf (" - too new, fdt $d > %d",
+ fdt_version(fdt), FDT_LAST_SUPPORTED_VERSION);
+ fdt = NULL;
+ }
+ return 0;
+ }
+ printf("\n");
+ return 0;
+ }
+ return 1;
+}
+
+/********************************************************************/
+
+/*
+ * OF flat tree handling
+ * Written by: Pantelis Antoniou <pantelis.antoniou@gmail.com>
+ * Updated by: Matthew McClintock <msm@freescale.com>
+ * Converted to libfdt by: Gerald Van Baren <vanbaren@cideas.com>
+ */
+
+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 */
+ if (s[len - 1] != '\0')
+ return 0;
+
+ /* printable or a null byte (concatenated strings) */
+ while (((*s == '\0') || isprint(*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;
+}
+
+static void print_data(const void *data, int len)
+{
+ int j;
+ const u8 *s;
+
+ /* 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;
+ }
+
+ switch (len) {
+ case 1: /* byte */
+ printf("<%02x>", (*(u8 *) data) & 0xff);
+ break;
+ case 2: /* half-word */
+ printf("<%04x>", be16_to_cpu(*(u16 *) data) & 0xffff);
+ break;
+ case 4: /* word */
+ printf("<%08x>", be32_to_cpu(*(u32 *) data) & 0xffffffffU);
+ break;
+ case 8: /* double-word */
+#if __WORDSIZE == 64
+ printf("<%016llx>", be64_to_cpu(*(uint64_t *) data));
+#else
+ printf("<%08x ", be32_to_cpu(*(u32 *) data) & 0xffffffffU);
+ data += 4;
+ printf("%08x>", be32_to_cpu(*(u32 *) data) & 0xffffffffU);
+#endif
+ break;
+ default: /* anything else... hexdump */
+ printf("[");
+ for (j = 0, s = data; j < len; j++)
+ printf("%02x%s", s[j], j < len - 1 ? " " : "");
+ printf("]");
+
+ break;
+ }
+}
+
+/********************************************************************/
+
+U_BOOT_CMD(
+ fdt, 5, 0, do_fdt,
+ "fdt - flattened device tree utility commands\n",
+ "addr <addr> [<length>] - Set the fdt location to <addr>\n"
+ "fdt move <fdt> <newaddr> <length> - Copy the fdt to <addr>\n"
+ "fdt print <path> [<prop>] - Recursive print starting at <path>\n"
+ "fdt list <path> [<prop>] - Print one level starting at <path>\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 chosen - Add/update the \"/chosen\" branch in the tree\n"
+#ifdef CONFIG_OF_HAS_UBOOT_ENV
+ "fdt env - Add/replace the \"/u-boot-env\" branch in the tree\n"
+#endif
+#ifdef CONFIG_OF_HAS_BD_T
+ "fdt bd_t - Add/replace the \"/bd_t\" branch in the tree\n"
+#endif
+ "Hints:\n"
+ " * Set a larger length with the fdt addr command to add to the blob.\n"
+ " * If the property you are setting/printing has a '#' character,\n"
+ " you MUST escape it with a \\ character or quote it with \" or\n"
+ " it will be ignored as a comment.\n"
+ " * If the value has spaces in it, you MUST escape the spaces with\n"
+ " \\ characters or quote it with \"\"\n"
+ "Examples: fdt print / # print the whole tree\n"
+ " fdt print /cpus \"#address-cells\"\n"
+ " fdt set /cpus \"#address-cells\" \"[00 00 00 01]\"\n"
+);
+
+#endif /* CONFIG_OF_LIBFDT */
generated by cgit v1.1 at 2024-11-28 16:25:44 +0000