| 1 | /* |
| 2 | * ZyXEL's Bootbase specific prom routines |
| 3 | * |
| 4 | * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License version 2 as published |
| 8 | * by the Free Software Foundation. |
| 9 | * |
| 10 | */ |
| 11 | |
| 12 | #include <linux/types.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/string.h> |
| 16 | |
| 17 | #include <asm/bootinfo.h> |
| 18 | #include <asm/addrspace.h> |
| 19 | #include <asm/byteorder.h> |
| 20 | |
| 21 | #include <asm/mach-adm5120/adm5120_defs.h> |
| 22 | #include <prom/zynos.h> |
| 23 | #include "prom_read.h" |
| 24 | |
| 25 | #define ZYNOS_INFO_ADDR KSEG1ADDR(ADM5120_SRAM0_BASE+0x3F90) |
| 26 | #define ZYNOS_HDBG_ADDR KSEG1ADDR(ADM5120_SRAM0_BASE+0x4000) |
| 27 | #define BOOTEXT_ADDR_MIN KSEG1ADDR(ADM5120_SRAM0_BASE) |
| 28 | #define BOOTEXT_ADDR_MAX (BOOTEXT_ADDR_MIN + (2*1024*1024)) |
| 29 | |
| 30 | static int bootbase_found; |
| 31 | static struct zynos_board_info *board_info; |
| 32 | |
| 33 | struct bootbase_info bootbase_info; |
| 34 | |
| 35 | static inline int bootbase_dbgarea_present(u8 *data) |
| 36 | { |
| 37 | u32 t; |
| 38 | |
| 39 | t = prom_read_be32(data+5); |
| 40 | if (t != ZYNOS_MAGIC_DBGAREA1) |
| 41 | return 0; |
| 42 | |
| 43 | t = prom_read_be32(data+9); |
| 44 | if (t != ZYNOS_MAGIC_DBGAREA2) |
| 45 | return 0; |
| 46 | |
| 47 | return 1; |
| 48 | } |
| 49 | |
| 50 | static inline u32 bootbase_get_bootext_addr(void) |
| 51 | { |
| 52 | return prom_read_be32(&board_info->bootext_addr); |
| 53 | } |
| 54 | |
| 55 | static inline void bootbase_get_mac(u8 *mac) |
| 56 | { |
| 57 | int i; |
| 58 | |
| 59 | for (i = 0; i < 6; i++) |
| 60 | mac[i] = board_info->mac[i]; |
| 61 | } |
| 62 | |
| 63 | static inline u16 bootbase_get_vendor_id(void) |
| 64 | { |
| 65 | #define CHECK_VENDOR(n) (strnicmp(board_info->vendor, (n), strlen(n)) == 0) |
| 66 | unsigned char vendor[ZYNOS_NAME_LEN]; |
| 67 | int i; |
| 68 | |
| 69 | for (i = 0; i < ZYNOS_NAME_LEN; i++) |
| 70 | vendor[i] = board_info->vendor[i]; |
| 71 | |
| 72 | if CHECK_VENDOR(ZYNOS_VENDOR_ZYXEL) |
| 73 | return ZYNOS_VENDOR_ID_ZYXEL; |
| 74 | |
| 75 | if CHECK_VENDOR(ZYNOS_VENDOR_DLINK) |
| 76 | return ZYNOS_VENDOR_ID_DLINK; |
| 77 | |
| 78 | if CHECK_VENDOR(ZYNOS_VENDOR_LUCENT) |
| 79 | return ZYNOS_VENDOR_ID_LUCENT; |
| 80 | |
| 81 | if CHECK_VENDOR(ZYNOS_VENDOR_NETGEAR) |
| 82 | return ZYNOS_VENDOR_ID_NETGEAR; |
| 83 | |
| 84 | return ZYNOS_VENDOR_ID_OTHER; |
| 85 | } |
| 86 | |
| 87 | static inline u16 bootbase_get_board_id(void) |
| 88 | { |
| 89 | return prom_read_be16(&board_info->board_id); |
| 90 | } |
| 91 | |
| 92 | int __init bootbase_present(void) |
| 93 | { |
| 94 | u32 t; |
| 95 | |
| 96 | if (bootbase_found) |
| 97 | goto out; |
| 98 | |
| 99 | /* check presence of the dbgarea */ |
| 100 | if (bootbase_dbgarea_present((u8 *)ZYNOS_HDBG_ADDR) == 0) |
| 101 | goto out; |
| 102 | |
| 103 | board_info = (struct zynos_board_info *)(ZYNOS_INFO_ADDR); |
| 104 | |
| 105 | /* check for a valid BootExt address */ |
| 106 | t = bootbase_get_bootext_addr(); |
| 107 | if ((t < BOOTEXT_ADDR_MIN) || (t > BOOTEXT_ADDR_MAX)) |
| 108 | goto out; |
| 109 | |
| 110 | bootbase_info.vendor_id = bootbase_get_vendor_id(); |
| 111 | bootbase_info.board_id = bootbase_get_board_id(); |
| 112 | bootbase_get_mac(bootbase_info.mac); |
| 113 | |
| 114 | bootbase_found = 1; |
| 115 | |
| 116 | out: |
| 117 | return bootbase_found; |
| 118 | } |
| 119 | |
| 120 | |
