summaryrefslogtreecommitdiff
path: root/common/fdt_support.c
diff options
context:
space:
mode:
Diffstat (limited to 'common/fdt_support.c')
-rw-r--r--common/fdt_support.c347
1 files changed, 347 insertions, 0 deletions
diff --git a/common/fdt_support.c b/common/fdt_support.c
new file mode 100644
index 0000000..69099c4
--- /dev/null
+++ b/common/fdt_support.c
@@ -0,0 +1,347 @@
+/*
+ * (C) Copyright 2007
+ * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.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 <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>
+
+/*
+ * Global data (for the gd->bd)
+ */
+DECLARE_GLOBAL_DATA_PTR;
+
+
+/********************************************************************/
+
+int fdt_chosen(void *fdt, ulong initrd_start, ulong initrd_end, int force)
+{
+ bd_t *bd = gd->bd;
+ int nodeoffset;
+ int err;
+ u32 tmp; /* used to set 32 bit integer properties */
+ char *str; /* used to set string properties */
+ ulong clock;
+
+ err = fdt_check_header(fdt);
+ if (err < 0) {
+ printf("libfdt: %s\n", fdt_strerror(err));
+ return err;
+ }
+
+ if (initrd_start && initrd_end) {
+ struct fdt_reserve_entry re;
+ int used;
+ int total;
+ int j;
+
+ err = fdt_num_reservemap(fdt, &used, &total);
+ if (err < 0) {
+ printf("libfdt: %s\n", fdt_strerror(err));
+ return err;
+ }
+ if (used >= total) {
+ printf("fdt_chosen: no room in the reserved map (%d of %d)\n",
+ used, total);
+ return -1;
+ }
+ /*
+ * Look for an existing entry and update it. If we don't find
+ * the entry, we will j be the next available slot.
+ */
+ for (j = 0; j < used; j++) {
+ err = fdt_get_reservemap(fdt, j, &re);
+ if (re.address == initrd_start) {
+ break;
+ }
+ }
+ err = fdt_replace_reservemap_entry(fdt, j,
+ initrd_start, initrd_end - initrd_start + 1);
+ if (err < 0) {
+ printf("libfdt: %s\n", fdt_strerror(err));
+ return err;
+ }
+ }
+
+ /*
+ * Find the "chosen" node.
+ */
+ nodeoffset = fdt_path_offset (fdt, "/chosen");
+
+ /*
+ * If we have a "chosen" node already the "force the writing"
+ * is not set, our job is done.
+ */
+ if ((nodeoffset >= 0) && !force)
+ return 0;
+
+ /*
+ * No "chosen" node in the blob: create it.
+ */
+ if (nodeoffset < 0) {
+ /*
+ * Create a new node "/chosen" (offset 0 is root level)
+ */
+ nodeoffset = fdt_add_subnode(fdt, 0, "chosen");
+ if (nodeoffset < 0) {
+ printf("libfdt: %s\n", fdt_strerror(nodeoffset));
+ return nodeoffset;
+ }
+ }
+
+ /*
+ * Update pre-existing properties, create them if non-existant.
+ */
+ str = getenv("bootargs");
+ if (str != NULL) {
+ err = fdt_setprop(fdt, nodeoffset, "bootargs", str, strlen(str)+1);
+ if (err < 0)
+ printf("libfdt: %s\n", fdt_strerror(err));
+ }
+ if (initrd_start && initrd_end) {
+ tmp = __cpu_to_be32(initrd_start);
+ err = fdt_setprop(fdt, nodeoffset, "linux,initrd-start", &tmp, sizeof(tmp));
+ if (err < 0)
+ printf("libfdt: %s\n", fdt_strerror(err));
+ tmp = __cpu_to_be32(initrd_end);
+ err = fdt_setprop(fdt, nodeoffset, "linux,initrd-end", &tmp, sizeof(tmp));
+ if (err < 0)
+ printf("libfdt: %s\n", fdt_strerror(err));
+ }
+#ifdef OF_STDOUT_PATH
+ err = fdt_setprop(fdt, nodeoffset, "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1);
+ if (err < 0)
+ printf("libfdt: %s\n", fdt_strerror(err));
+#endif
+
+ nodeoffset = fdt_path_offset (fdt, "/cpus");
+ if (nodeoffset >= 0) {
+ clock = cpu_to_be32(bd->bi_intfreq);
+ err = fdt_setprop(fdt, nodeoffset, "clock-frequency", &clock, 4);
+ if (err < 0)
+ printf("libfdt: %s\n", fdt_strerror(err));
+ }
+#ifdef OF_TBCLK
+ nodeoffset = fdt_path_offset (fdt, "/cpus/" OF_CPU "/timebase-frequency");
+ if (nodeoffset >= 0) {
+ clock = cpu_to_be32(OF_TBCLK);
+ err = fdt_setprop(fdt, nodeoffset, "clock-frequency", &clock, 4);
+ if (err < 0)
+ printf("libfdt: %s\n", fdt_strerror(err));
+ }
+#endif
+ return err;
+}
+
+/********************************************************************/
+
+#ifdef CONFIG_OF_HAS_UBOOT_ENV
+
+/* Function that returns a character from the environment */
+extern uchar(*env_get_char) (int);
+
+
+int fdt_env(void *fdt)
+{
+ int nodeoffset;
+ int err;
+ int k, nxt;
+ int i;
+ static char tmpenv[256];
+
+ err = fdt_check_header(fdt);
+ if (err < 0) {
+ printf("libfdt: %s\n", fdt_strerror(err));
+ return err;
+ }
+
+ /*
+ * See if we already have a "u-boot-env" node, delete it if so.
+ * Then create a new empty node.
+ */
+ nodeoffset = fdt_path_offset (fdt, "/u-boot-env");
+ if (nodeoffset >= 0) {
+ err = fdt_del_node(fdt, nodeoffset);
+ if (err < 0) {
+ printf("libfdt: %s\n", fdt_strerror(err));
+ return err;
+ }
+ }
+ /*
+ * Create a new node "/u-boot-env" (offset 0 is root level)
+ */
+ nodeoffset = fdt_add_subnode(fdt, 0, "u-boot-env");
+ if (nodeoffset < 0) {
+ printf("libfdt: %s\n", fdt_strerror(nodeoffset));
+ return nodeoffset;
+ }
+
+ for (i = 0; env_get_char(i) != '\0'; i = nxt + 1) {
+ char *s, *lval, *rval;
+
+ /*
+ * Find the end of the name=definition
+ */
+ for (nxt = i; env_get_char(nxt) != '\0'; ++nxt)
+ ;
+ s = tmpenv;
+ for (k = i; k < nxt && s < &tmpenv[sizeof(tmpenv) - 1]; ++k)
+ *s++ = env_get_char(k);
+ *s++ = '\0';
+ lval = tmpenv;
+ /*
+ * Find the first '=': it separates the name from the value
+ */
+ s = strchr(tmpenv, '=');
+ if (s != NULL) {
+ *s++ = '\0';
+ rval = s;
+ } else
+ continue;
+ err = fdt_setprop(fdt, nodeoffset, lval, rval, strlen(rval)+1);
+ if (err < 0) {
+ printf("libfdt: %s\n", fdt_strerror(err));
+ return err;
+ }
+ }
+ return 0;
+}
+#endif /* ifdef CONFIG_OF_HAS_UBOOT_ENV */
+
+/********************************************************************/
+
+#ifdef CONFIG_OF_HAS_BD_T
+
+#define BDM(x) { .name = #x, .offset = offsetof(bd_t, bi_ ##x ) }
+
+static const struct {
+ const char *name;
+ int offset;
+} bd_map[] = {
+ BDM(memstart),
+ BDM(memsize),
+ BDM(flashstart),
+ BDM(flashsize),
+ BDM(flashoffset),
+ BDM(sramstart),
+ BDM(sramsize),
+#if defined(CONFIG_5xx) || defined(CONFIG_8xx) || defined(CONFIG_8260) \
+ || defined(CONFIG_E500)
+ BDM(immr_base),
+#endif
+#if defined(CONFIG_MPC5xxx)
+ BDM(mbar_base),
+#endif
+#if defined(CONFIG_MPC83XX)
+ BDM(immrbar),
+#endif
+#if defined(CONFIG_MPC8220)
+ BDM(mbar_base),
+ BDM(inpfreq),
+ BDM(pcifreq),
+ BDM(pevfreq),
+ BDM(flbfreq),
+ BDM(vcofreq),
+#endif
+ BDM(bootflags),
+ BDM(ip_addr),
+ BDM(intfreq),
+ BDM(busfreq),
+#ifdef CONFIG_CPM2
+ BDM(cpmfreq),
+ BDM(brgfreq),
+ BDM(sccfreq),
+ BDM(vco),
+#endif
+#if defined(CONFIG_MPC5xxx)
+ BDM(ipbfreq),
+ BDM(pcifreq),
+#endif
+ BDM(baudrate),
+};
+
+
+int fdt_bd_t(void *fdt)
+{
+ bd_t *bd = gd->bd;
+ int nodeoffset;
+ int err;
+ u32 tmp; /* used to set 32 bit integer properties */
+ int i;
+
+ err = fdt_check_header(fdt);
+ if (err < 0) {
+ printf("libfdt: %s\n", fdt_strerror(err));
+ return err;
+ }
+
+ /*
+ * See if we already have a "bd_t" node, delete it if so.
+ * Then create a new empty node.
+ */
+ nodeoffset = fdt_path_offset (fdt, "/bd_t");
+ if (nodeoffset >= 0) {
+ err = fdt_del_node(fdt, nodeoffset);
+ if (err < 0) {
+ printf("libfdt: %s\n", fdt_strerror(err));
+ return err;
+ }
+ }
+ /*
+ * Create a new node "/bd_t" (offset 0 is root level)
+ */
+ nodeoffset = fdt_add_subnode(fdt, 0, "bd_t");
+ if (nodeoffset < 0) {
+ printf("libfdt: %s\n", fdt_strerror(nodeoffset));
+ return nodeoffset;
+ }
+ /*
+ * Use the string/pointer structure to create the entries...
+ */
+ for (i = 0; i < sizeof(bd_map)/sizeof(bd_map[0]); i++) {
+ tmp = cpu_to_be32(getenv("bootargs"));
+ err = fdt_setprop(fdt, nodeoffset, bd_map[i].name, &tmp, sizeof(tmp));
+ if (err < 0)
+ printf("libfdt: %s\n", fdt_strerror(err));
+ }
+ /*
+ * Add a couple of oddball entries...
+ */
+ err = fdt_setprop(fdt, nodeoffset, "enetaddr", &bd->bi_enetaddr, 6);
+ if (err < 0)
+ printf("libfdt: %s\n", fdt_strerror(err));
+ err = fdt_setprop(fdt, nodeoffset, "ethspeed", &bd->bi_ethspeed, 4);
+ if (err < 0)
+ printf("libfdt: %s\n", fdt_strerror(err));
+
+ return 0;
+}
+#endif /* ifdef CONFIG_OF_HAS_BD_T */
+
+#endif /* CONFIG_OF_LIBFDT */
generated by cgit v1.1 at 2024-11-16 14:32:25 +0000