125 lines
3.0 KiB
C
125 lines
3.0 KiB
C
/*
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* $Id$
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*
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* ZyXEL's Bootbase specific prom routines
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*
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* Copyright (C) 2007 OpenWrt.org
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* Copyright (C) 2007 Gabor Juhos <juhosg@freemail.hu>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include <linux/types.h>
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#include <linux/autoconf.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/string.h>
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#include <asm/bootinfo.h>
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#include <asm/addrspace.h>
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#include <asm/byteorder.h>
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#include <adm5120_defs.h>
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#include <prom/zynos.h>
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#include "prom_read.h"
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#define ZYNOS_INFO_ADDR KSEG1ADDR(ADM5120_SRAM0_BASE+0x3F90)
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#define ZYNOS_HDBG_ADDR KSEG1ADDR(ADM5120_SRAM0_BASE+0x4000)
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#define BOOTEXT_ADDR_MIN KSEG1ADDR(ADM5120_SRAM0_BASE)
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#define BOOTEXT_ADDR_MAX (BOOTEXT_ADDR_MIN + (2*1024*1024))
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static int bootbase_found = 0;
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static struct zynos_board_info *board_info;
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struct bootbase_info bootbase_info;
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static inline int bootbase_dbgarea_present(u8 *data)
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{
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u32 t;
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t = prom_read_be32(data+5);
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if (t != ZYNOS_MAGIC_DBGAREA1)
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return 0;
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t = prom_read_be32(data+9);
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if (t != ZYNOS_MAGIC_DBGAREA2)
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return 0;
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return 1;
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}
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static inline u32 bootbase_get_bootext_addr(void)
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{
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return prom_read_be32(&board_info->bootext_addr);
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}
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static inline u16 bootbase_get_vendor_id(void)
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{
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#define CHECK_VENDOR(n) (strnicmp(board_info->vendor,(n),strlen(n)) == 0)
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unsigned char vendor[ZYNOS_NAME_LEN];
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int i;
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for (i=0; i<ZYNOS_NAME_LEN; i++)
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vendor[i]=board_info->vendor[i];
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if CHECK_VENDOR(ZYNOS_VENDOR_ZYXEL)
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return ZYNOS_VENDOR_ID_ZYXEL;
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if CHECK_VENDOR(ZYNOS_VENDOR_DLINK)
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return ZYNOS_VENDOR_ID_DLINK;
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if CHECK_VENDOR(ZYNOS_VENDOR_LUCENT)
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return ZYNOS_VENDOR_ID_LUCENT;
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if CHECK_VENDOR(ZYNOS_VENDOR_NETGEAR)
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return ZYNOS_VENDOR_ID_NETGEAR;
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return ZYNOS_VENDOR_ID_OTHER;
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}
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static inline u16 bootbase_get_board_id(void)
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{
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return prom_read_be16(&board_info->board_id);
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}
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int __init bootbase_present(void)
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{
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u32 t;
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if (bootbase_found)
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goto out;
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/* check presence of the dbgarea */
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if (bootbase_dbgarea_present((u8 *)ZYNOS_HDBG_ADDR) == 0)
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goto out;
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board_info = (struct zynos_board_info *)(ZYNOS_INFO_ADDR);
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/* check for a valid BootExt address */
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t = bootbase_get_bootext_addr();
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if ((t < BOOTEXT_ADDR_MIN) || (t > BOOTEXT_ADDR_MAX))
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goto out;
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bootbase_info.vendor_id = bootbase_get_vendor_id();
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bootbase_info.board_id = bootbase_get_board_id();
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bootbase_found = 1;
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out:
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return bootbase_found;
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}
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