From fec6047047fda307e47b9e87697144a89528c752 Mon Sep 17 00:00:00 2001 From: Scott Wood Date: Tue, 25 Sep 2007 06:09:49 +1000 Subject: [PATCH] [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 Acked-by: David Gibson Signed-off-by: Paul Mackerras --- arch/powerpc/boot/Makefile | 2 +- arch/powerpc/boot/planetcore.c | 166 +++++++++++++++++++++++++++++++++ arch/powerpc/boot/planetcore.h | 49 ++++++++++ 3 files changed, 216 insertions(+), 1 deletion(-) create mode 100644 arch/powerpc/boot/planetcore.c create mode 100644 arch/powerpc/boot/planetcore.h diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile index b63e423428c7..a6bba9a69e66 100644 --- 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 index 000000000000..0d8558a475bb --- /dev/null +++ b/arch/powerpc/boot/planetcore.c @@ -0,0 +1,166 @@ +/* + * PlanetCore configuration data support functions + * + * Author: Scott Wood + * + * 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 index 000000000000..0d4094f1771c --- /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