| 1 | /* |
| 2 | * Atheros AR71xx SoC specific prom routines |
| 3 | * |
| 4 | * Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org> |
| 5 | * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of the GNU General Public License version 2 as published |
| 9 | * by the Free Software Foundation. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/kernel.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/io.h> |
| 15 | #include <linux/string.h> |
| 16 | |
| 17 | #include <asm/bootinfo.h> |
| 18 | #include <asm/addrspace.h> |
| 19 | #include <asm/fw/myloader/myloader.h> |
| 20 | |
| 21 | #include <asm/mach-ar71xx/ar71xx.h> |
| 22 | |
| 23 | static inline int is_valid_ram_addr(void *addr) |
| 24 | { |
| 25 | if (((u32) addr > KSEG0) && |
| 26 | ((u32) addr < (KSEG0 + AR71XX_MEM_SIZE_MAX))) |
| 27 | return 1; |
| 28 | |
| 29 | if (((u32) addr > KSEG1) && |
| 30 | ((u32) addr < (KSEG1 + AR71XX_MEM_SIZE_MAX))) |
| 31 | return 1; |
| 32 | |
| 33 | return 0; |
| 34 | } |
| 35 | |
| 36 | static void __init ar71xx_prom_append_cmdline(const char *name, |
| 37 | const char *value) |
| 38 | { |
| 39 | char buf[COMMAND_LINE_SIZE]; |
| 40 | |
| 41 | snprintf(buf, sizeof(buf), " %s=%s", name, value); |
| 42 | strlcat(arcs_cmdline, buf, sizeof(arcs_cmdline)); |
| 43 | } |
| 44 | |
| 45 | static const char * __init ar71xx_prom_find_env(char **envp, const char *name) |
| 46 | { |
| 47 | const char *ret = NULL; |
| 48 | int len; |
| 49 | char **p; |
| 50 | |
| 51 | if (!is_valid_ram_addr(envp)) |
| 52 | return NULL; |
| 53 | |
| 54 | len = strlen(name); |
| 55 | for (p = envp; is_valid_ram_addr(*p); p++) { |
| 56 | if (strncmp(name, *p, len) == 0 && (*p)[len] == '=') { |
| 57 | ret = *p + len + 1; |
| 58 | break; |
| 59 | } |
| 60 | |
| 61 | /* RedBoot env comes in pointer pairs - key, value */ |
| 62 | if (strncmp(name, *p, len) == 0 && (*p)[len] == 0) |
| 63 | if (is_valid_ram_addr(*(++p))) { |
| 64 | ret = *p; |
| 65 | break; |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | return ret; |
| 70 | } |
| 71 | |
| 72 | static int __init ar71xx_prom_init_myloader(void) |
| 73 | { |
| 74 | struct myloader_info *mylo; |
| 75 | char mac_buf[32]; |
| 76 | char *mac; |
| 77 | |
| 78 | mylo = myloader_get_info(); |
| 79 | if (!mylo) |
| 80 | return 0; |
| 81 | |
| 82 | switch (mylo->did) { |
| 83 | case DEVID_COMPEX_WP543: |
| 84 | ar71xx_prom_append_cmdline("board", "WP543"); |
| 85 | break; |
| 86 | default: |
| 87 | printk(KERN_WARNING "prom: unknown device id: %x\n", |
| 88 | mylo->did); |
| 89 | return 0; |
| 90 | } |
| 91 | |
| 92 | mac = mylo->macs[0]; |
| 93 | snprintf(mac_buf, sizeof(mac_buf), "%02x:%02x:%02x:%02x:%02x:%02x", |
| 94 | mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); |
| 95 | |
| 96 | ar71xx_prom_append_cmdline("ethaddr", mac_buf); |
| 97 | |
| 98 | return 1; |
| 99 | } |
| 100 | |
| 101 | #ifdef CONFIG_IMAGE_CMDLINE_HACK |
| 102 | extern char __image_cmdline[]; |
| 103 | |
| 104 | static int __init ar71xx_use__image_cmdline(void) |
| 105 | { |
| 106 | char *p = __image_cmdline; |
| 107 | int replace = 0; |
| 108 | |
| 109 | if (*p == '-') { |
| 110 | replace = 1; |
| 111 | p++; |
| 112 | } |
| 113 | |
| 114 | if (*p == '\0') |
| 115 | return 0; |
| 116 | |
| 117 | if (replace) { |
| 118 | strlcpy(arcs_cmdline, p, sizeof(arcs_cmdline)); |
| 119 | } else { |
| 120 | strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline)); |
| 121 | strlcat(arcs_cmdline, p, sizeof(arcs_cmdline)); |
| 122 | } |
| 123 | |
| 124 | return 1; |
| 125 | } |
| 126 | #else |
| 127 | static inline int ar71xx_use__image_cmdline(void) { return 0; } |
| 128 | #endif |
| 129 | |
| 130 | static __init void ar71xx_prom_init_cmdline(int argc, char **argv) |
| 131 | { |
| 132 | int i; |
| 133 | |
| 134 | if (ar71xx_use__image_cmdline()) |
| 135 | return; |
| 136 | |
| 137 | if (!is_valid_ram_addr(argv)) |
| 138 | return; |
| 139 | |
| 140 | for (i = 0; i < argc; i++) |
| 141 | if (is_valid_ram_addr(argv[i])) { |
| 142 | strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline)); |
| 143 | strlcat(arcs_cmdline, argv[i], sizeof(arcs_cmdline)); |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | void __init prom_init(void) |
| 148 | { |
| 149 | const char *env; |
| 150 | char **envp; |
| 151 | |
| 152 | printk(KERN_DEBUG "prom: fw_arg0=%08x, fw_arg1=%08x, " |
| 153 | "fw_arg2=%08x, fw_arg3=%08x\n", |
| 154 | (unsigned int)fw_arg0, (unsigned int)fw_arg1, |
| 155 | (unsigned int)fw_arg2, (unsigned int)fw_arg3); |
| 156 | |
| 157 | |
| 158 | if (ar71xx_prom_init_myloader()) |
| 159 | return; |
| 160 | |
| 161 | ar71xx_prom_init_cmdline(fw_arg0, (char **)fw_arg1); |
| 162 | |
| 163 | envp = (char **)fw_arg2; |
| 164 | if (!strstr(arcs_cmdline, "ethaddr=")) { |
| 165 | env = ar71xx_prom_find_env(envp, "ethaddr"); |
| 166 | if (env) |
| 167 | ar71xx_prom_append_cmdline("ethaddr", env); |
| 168 | } |
| 169 | |
| 170 | if (!strstr(arcs_cmdline, "board=")) { |
| 171 | env = ar71xx_prom_find_env(envp, "board"); |
| 172 | if (env) { |
| 173 | /* Workaround for buggy bootloaders */ |
| 174 | if (strcmp(env, "RouterStation") == 0 || |
| 175 | strcmp(env, "Ubiquiti AR71xx-based board") == 0) |
| 176 | env = "UBNT-RS"; |
| 177 | |
| 178 | if (strcmp(env, "RouterStation PRO") == 0) |
| 179 | env = "UBNT-RSPRO"; |
| 180 | |
| 181 | ar71xx_prom_append_cmdline("board", env); |
| 182 | } |
| 183 | } |
| 184 | } |
| 185 | |
| 186 | void __init prom_free_prom_memory(void) |
| 187 | { |
| 188 | /* We do not have to prom memory to free */ |
| 189 | } |
| 190 | |
