[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>

diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index b63e423428c721a72f3727885b94fc774e679549..a6bba9a69e6637f2d4870e7097e9d6be84a825b4 100644 (file)
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -45,7 +45,7 @@ src-wlib := string.S crt0.S stdio.c main.c flatdevtree.c flatdevtree_misc.c \
                ns16550.c serial.c simple_alloc.c div64.S util.S \
                gunzip_util.c elf_util.c $(zlib) devtree.c oflib.c ofconsole.c \
                4xx.c ebony.c mv64x60.c mpsc.c mv64x60_i2c.c cuboot.c bamboo.c \
-               cpm-serial.c stdlib.c mpc52xx-psc.c
+               cpm-serial.c stdlib.c mpc52xx-psc.c planetcore.c
 src-plat := of.c cuboot-52xx.c cuboot-83xx.c cuboot-85xx.c holly.c \
                cuboot-ebony.c treeboot-ebony.c prpmc2800.c \
                ps3-head.S ps3-hvcall.S ps3.c treeboot-bamboo.c cuboot-8xx.c \

diff --git a/arch/powerpc/boot/planetcore.c b/arch/powerpc/boot/planetcore.c
new file mode 100644 (file)
index 0000000..0d8558a
--- /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);
+}

diff --git a/arch/powerpc/boot/planetcore.h b/arch/powerpc/boot/planetcore.h
new file mode 100644 (file)
index 0000000..0d4094f
--- /dev/null
+++ b/arch/powerpc/boot/planetcore.h
@@ -0,0 +1,49 @@
+#ifndef _PPC_BOOT_PLANETCORE_H_
+#define _PPC_BOOT_PLANETCORE_H_
+
+#include "types.h"
+
+#define PLANETCORE_KEY_BOARD_TYPE   "BO"
+#define PLANETCORE_KEY_BOARD_REV    "BR"
+#define PLANETCORE_KEY_MB_RAM       "D1"
+#define PLANETCORE_KEY_MAC_ADDR     "EA"
+#define PLANETCORE_KEY_FLASH_SPEED  "FS"
+#define PLANETCORE_KEY_IP_ADDR      "IP"
+#define PLANETCORE_KEY_KB_NVRAM     "NV"
+#define PLANETCORE_KEY_PROCESSOR    "PR"
+#define PLANETCORE_KEY_PROC_VARIANT "PV"
+#define PLANETCORE_KEY_SERIAL_BAUD  "SB"
+#define PLANETCORE_KEY_SERIAL_PORT  "SP"
+#define PLANETCORE_KEY_SWITCH       "SW"
+#define PLANETCORE_KEY_TEMP_OFFSET  "TC"
+#define PLANETCORE_KEY_TARGET_IP    "TIP"
+#define PLANETCORE_KEY_CRYSTAL_HZ   "XT"
+
+/* Prepare the table for processing, by turning all newlines
+ * into NULL bytes.
+ */
+void planetcore_prepare_table(char *table);
+
+/* Return the value associated with a given key in text,
+ * decimal, or hex format.
+ *
+ * Returns zero/NULL on failure, non-zero on success.
+ */
+const char *planetcore_get_key(const char *table, const char *key);
+int planetcore_get_decimal(const char *table, const char *key, u64 *val);
+int planetcore_get_hex(const char *table, const char *key, u64 *val);
+
+/* Updates the device tree local-mac-address properties based
+ * on the EA tag.
+ */
+void planetcore_set_mac_addrs(const char *table);
+
+/* Sets the linux,stdout-path in the /chosen node.  This requires the
+ * linux,planetcore-label property in each serial node.
+ */
+void planetcore_set_stdout_path(const char *table);
+
+/* Sets the current-speed property in the serial node. */
+void planetcore_set_serial_speed(const char *table);
+
+#endif