[POWERPC] bootwrapper: Add PlanetCore firmware support

This is a library that board code can use to extract information from the
PlanetCore configuration keys.  PlanetCore is used on various boards from
Embedded Planet.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 166 insertions, 0 deletions

diff --git a/arch/powerpc/boot/planetcore.c b/arch/powerpc/boot/planetcore.c
new file mode 100644
index 000000000000..0d8558a475bb
--- /dev/null
+++ b/arch/powerpc/boot/planetcore.c
@@ -0,0 +1,166 @@
+/*
+ * PlanetCore configuration data support functions
+ *
+ * Author: Scott Wood <scottwood@freescale.com>
+ *
+ * Copyright (c) 2007 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include "stdio.h"
+#include "stdlib.h"
+#include "ops.h"
+#include "planetcore.h"
+#include "io.h"
+
+/* PlanetCore passes information to the OS in the form of
+ * a table of key=value strings, separated by newlines.
+ *
+ * The list is terminated by an empty string (i.e. two
+ * consecutive newlines).
+ *
+ * To make it easier to parse, we first convert all the
+ * newlines into null bytes.
+ */
+
+void planetcore_prepare_table(char *table)
+{
+        do {
+                if (*table == '\n')
+                        *table = 0;
+
+                table++;
+        } while (*(table - 1) || *table != '\n');
+
+        *table = 0;
+}
+
+const char *planetcore_get_key(const char *table, const char *key)
+{
+        int keylen = strlen(key);
+
+        do {
+                if (!strncmp(table, key, keylen) && table[keylen] == '=')
+                        return table + keylen + 1;
+
+                table += strlen(table) + 1;
+        } while (strlen(table) != 0);
+
+        return NULL;
+}
+
+int planetcore_get_decimal(const char *table, const char *key, u64 *val)
+{
+        const char *str = planetcore_get_key(table, key);
+        if (!str)
+                return 0;
+
+        *val = strtoull(str, NULL, 10);
+        return 1;
+}
+
+int planetcore_get_hex(const char *table, const char *key, u64 *val)
+{
+        const char *str = planetcore_get_key(table, key);
+        if (!str)
+                return 0;
+
+        *val = strtoull(str, NULL, 16);
+        return 1;
+}
+
+static u64 mac_table[4] = {
+        0x000000000000,
+        0x000000800000,
+        0x000000400000,
+        0x000000c00000,
+};
+
+void planetcore_set_mac_addrs(const char *table)
+{
+        u8 addr[4][6];
+        u64 int_addr;
+        u32 i;
+        int j;
+
+        if (!planetcore_get_hex(table, PLANETCORE_KEY_MAC_ADDR, &int_addr))
+                return;
+
+        for (i = 0; i < 4; i++) {
+                u64 this_dev_addr = (int_addr & ~0x000000c00000) |
+                                    mac_table[i];
+
+                for (j = 5; j >= 0; j--) {
+                        addr[i][j] = this_dev_addr & 0xff;
+                        this_dev_addr >>= 8;
+                }
+
+                dt_fixup_mac_address(i, addr[i]);
+        }
+}
+
+static char prop_buf[MAX_PROP_LEN];
+
+void planetcore_set_stdout_path(const char *table)
+{
+        char *path;
+        const char *label;
+        void *node, *chosen;
+
+        label = planetcore_get_key(table, PLANETCORE_KEY_SERIAL_PORT);
+        if (!label)
+                return;
+
+        node = find_node_by_prop_value_str(NULL, "linux,planetcore-label",
+                                           label);
+        if (!node)
+                return;
+
+        path = get_path(node, prop_buf, MAX_PROP_LEN);
+        if (!path)
+                return;
+
+        chosen = finddevice("/chosen");
+        if (!chosen)
+                chosen = create_node(NULL, "chosen");
+        if (!chosen)
+                return;
+
+        setprop_str(chosen, "linux,stdout-path", path);
+}
+
+void planetcore_set_serial_speed(const char *table)
+{
+        void *chosen, *stdout;
+        u64 baud;
+        u32 baud32;
+        int len;
+
+        chosen = finddevice("/chosen");
+        if (!chosen)
+                return;
+
+        len = getprop(chosen, "linux,stdout-path", prop_buf, MAX_PROP_LEN);
+        if (len <= 0)
+                return;
+
+        stdout = finddevice(prop_buf);
+        if (!stdout) {
+                printf("planetcore_set_serial_speed: "
+                       "Bad /chosen/linux,stdout-path.\r\n");
+
+                return;
+        }
+
+        if (!planetcore_get_decimal(table, PLANETCORE_KEY_SERIAL_BAUD,
+                                    &baud)) {
+                printf("planetcore_set_serial_speed: No SB tag.\r\n");
+                return;
+        }
+
+        baud32 = baud;
+        setprop(stdout, "current-speed", &baud32, 4);
+}