target/linux/ar71xx/files/arch/mips/ar71xx/prom.c

   1 /*
   2  *  Atheros AR71xx SoC specific prom routines
   3  *
   4  *  Copyright (C) 2008-2009 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 #include "devices.h"
  24
  25 struct board_rec {
  26         char                    *name;
  27         enum ar71xx_mach_type   mach_type;
  28 };
  29
  30 static struct board_rec boards[] __initdata = {
  31         {
  32                 .name           = "411",
  33                 .mach_type      = AR71XX_MACH_RB_411,
  34         }, {
  35                 .name           = "411U",
  36                 .mach_type      = AR71XX_MACH_RB_411U,
  37         }, {
  38                 .name           = "433",
  39                 .mach_type      = AR71XX_MACH_RB_433,
  40         }, {
  41                 .name           = "433U",
  42                 .mach_type      = AR71XX_MACH_RB_433U,
  43         }, {
  44                 .name           = "450",
  45                 .mach_type      = AR71XX_MACH_RB_450,
  46         }, {
  47                 .name           = "450G",
  48                 .mach_type      = AR71XX_MACH_RB_450G,
  49         }, {
  50                 .name           = "493",
  51                 .mach_type      = AR71XX_MACH_RB_493,
  52         }, {
  53                 .name           = "AP81",
  54                 .mach_type      = AR71XX_MACH_AP81,
  55         }, {
  56                 .name           = "AP83",
  57                 .mach_type      = AR71XX_MACH_AP83,
  58         }, {
  59                 .name           = "AW-NR580",
  60                 .mach_type      = AR71XX_MACH_AW_NR580,
  61         }, {
  62                 .name           = "DIR-825-B1",
  63                 .mach_type      = AR71XX_MACH_DIR_825_B1,
  64         }, {
  65                 .name           = "TEW-632BRP",
  66                 .mach_type      = AR71XX_MACH_TEW_632BRP,
  67         }, {
  68                 .name           = "TL-WR741ND",
  69                 .mach_type      = AR71XX_MACH_TL_WR741ND,
  70         }, {
  71                 .name           = "TL-WR941ND",
  72                 .mach_type      = AR71XX_MACH_TL_WR941ND,
  73         }, {
  74                 .name           = "TL-WR1043ND",
  75                 .mach_type      = AR71XX_MACH_TL_WR1043ND,
  76         }, {
  77                 .name           = "UBNT-RS",
  78                 .mach_type      = AR71XX_MACH_UBNT_RS,
  79         }, {
  80                 .name           = "UBNT-RSPRO",
  81                 .mach_type      = AR71XX_MACH_UBNT_RSPRO,
  82         }, {
  83                 .name           = "Ubiquiti AR71xx-based board",
  84                 .mach_type      = AR71XX_MACH_UBNT_RS,
  85         }, {
  86                 .name           = "UBNT-LS-SR71",
  87                 .mach_type      = AR71XX_MACH_UBNT_LSSR71,
  88         }, {
  89                 .name           = "UBNT-LSX",
  90                 .mach_type      = AR71XX_MACH_UBNT_LSX,
  91         }, {
  92                 .name           = "UBNT-BM",
  93                 .mach_type      = AR71XX_MACH_UBNT_BULLET_M,
  94         }, {
  95                 .name           = "UBNT-RM",
  96                 .mach_type      = AR71XX_MACH_UBNT_ROCKET_M,
  97         }, {
  98                 .name           = "UBNT-NM",
  99                 .mach_type      = AR71XX_MACH_UBNT_NANO_M,
 100         }, {
 101                 .name           = "WNDR3700",
 102                 .mach_type      = AR71XX_MACH_WNDR3700,
 103         }, {
 104                 .name           = "WNR2000",
 105                 .mach_type      = AR71XX_MACH_WNR2000,
 106         }, {
 107                 .name           = "WRT160NL",
 108                 .mach_type      = AR71XX_MACH_WRT160NL,
 109         }, {
 110                 .name           = "WP543",
 111                 .mach_type      = AR71XX_MACH_WP543,
 112         }, {
 113                 .name           = "WRT400N",
 114                 .mach_type      = AR71XX_MACH_WRT400N,
 115         }, {
 116                 .name           = "PB42",
 117                 .mach_type      = AR71XX_MACH_PB42,
 118         }, {
 119                 .name           = "PB44",
 120                 .mach_type      = AR71XX_MACH_PB44,
 121         }, {
 122                 .name           = "MZK-W300NH",
 123                 .mach_type      = AR71XX_MACH_MZK_W300NH,
 124         }, {
 125                 .name           = "MZK-W04NU",
 126                 .mach_type      = AR71XX_MACH_MZK_W04NU,
 127         }
 128 };
 129
 130 static int __init ar71xx_board_setup(char *name)
 131 {
 132         int i;
 133
 134         for (i = 0; i < ARRAY_SIZE(boards); i++)
 135                 if (strcmp(name, boards[i].name) == 0) {
 136                         ar71xx_mach = boards[i].mach_type;
 137                         break;
 138                 }
 139
 140         return 1;
 141 }
 142 __setup("board=", ar71xx_board_setup);
 143
 144 static int __init ar71xx_ethaddr_setup(char *str)
 145 {
 146         ar71xx_parse_mac_addr(str);
 147         return 1;
 148 }
 149 __setup("ethaddr=", ar71xx_ethaddr_setup);
 150
 151 static int __init ar71xx_kmac_setup(char *str)
 152 {
 153         ar71xx_parse_mac_addr(str);
 154         return 1;
 155 }
 156 __setup("kmac=", ar71xx_kmac_setup);
 157
 158 static inline int is_valid_ram_addr(void *addr)
 159 {
 160         if (((u32) addr > KSEG0) &&
 161             ((u32) addr < (KSEG0 + AR71XX_MEM_SIZE_MAX)))
 162                 return 1;
 163
 164         if (((u32) addr > KSEG1) &&
 165             ((u32) addr < (KSEG1 + AR71XX_MEM_SIZE_MAX)))
 166                 return 1;
 167
 168         return 0;
 169 }
 170
 171 static void __init ar71xx_prom_append_cmdline(const char *name,
 172                                               const char *value)
 173 {
 174         char buf[CL_SIZE];
 175
 176         snprintf(buf, sizeof(buf), " %s=%s", name, value);
 177         strlcat(arcs_cmdline, buf, sizeof(arcs_cmdline));
 178 }
 179
 180 static void __init ar71xx_prom_find_env(char **envp, const char *name)
 181 {
 182         int len = strlen(name);
 183         char **p;
 184
 185         if (!is_valid_ram_addr(envp))
 186                 return;
 187
 188         for (p = envp; is_valid_ram_addr(*p); p++) {
 189                 if (strncmp(name, *p, len) == 0 && (*p)[len] == '=') {
 190                         ar71xx_prom_append_cmdline(name, *p + len + 1);
 191                         break;
 192                 }
 193
 194                 /* RedBoot env comes in pointer pairs - key, value */
 195                 if (strncmp(name, *p, len) == 0 && (*p)[len] == 0)
 196                         if (is_valid_ram_addr(*(++p))) {
 197                                 ar71xx_prom_append_cmdline(name, *p);
 198                                 break;
 199                         }
 200         }
 201 }
 202
 203 static int __init ar71xx_prom_init_myloader(void)
 204 {
 205         struct myloader_info *mylo;
 206         char mac_buf[32];
 207         char *mac;
 208
 209         mylo = myloader_get_info();
 210         if (!mylo)
 211                 return 0;
 212
 213         switch (mylo->did) {
 214         case DEVID_COMPEX_WP543:
 215                 ar71xx_prom_append_cmdline("board", "WP543");
 216                 break;
 217         default:
 218                 printk(KERN_WARNING "prom: unknown device id: %x\n",
 219                                 mylo->did);
 220                 return 0;
 221         }
 222
 223         mac = mylo->macs[0];
 224         snprintf(mac_buf, sizeof(mac_buf), "%02x:%02x:%02x:%02x:%02x:%02x",
 225                  mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 226
 227         ar71xx_prom_append_cmdline("ethaddr", mac_buf);
 228
 229         return 1;
 230 }
 231
 232 #ifdef CONFIG_IMAGE_CMDLINE_HACK
 233 extern char __image_cmdline[];
 234
 235 static int __init ar71xx_use__image_cmdline(void)
 236 {
 237         char *p = __image_cmdline;
 238         int replace = 0;
 239
 240         if (*p == '-') {
 241                 replace = 1;
 242                 p++;
 243         }
 244
 245         if (*p == '\0')
 246                 return 0;
 247
 248         if (replace) {
 249                 strlcpy(arcs_cmdline, p, sizeof(arcs_cmdline));
 250         } else {
 251                 strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
 252                 strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
 253         }
 254
 255         return 1;
 256 }
 257 #else
 258 static int inline ar71xx_use__image_cmdline(void) { return 0; }
 259 #endif
 260
 261 static __init void ar71xx_prom_init_cmdline(int argc, char **argv)
 262 {
 263         int i;
 264
 265         if (ar71xx_use__image_cmdline())
 266                 return;
 267
 268         if (!is_valid_ram_addr(argv))
 269                 return;
 270
 271         for (i = 0; i < argc; i++)
 272                 if (is_valid_ram_addr(argv[i])) {
 273                         strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
 274                         strlcat(arcs_cmdline, argv[i], sizeof(arcs_cmdline));
 275                 }
 276 }
 277
 278 void __init prom_init(void)
 279 {
 280         char **envp;
 281
 282         printk(KERN_DEBUG "prom: fw_arg0=%08x, fw_arg1=%08x, "
 283                         "fw_arg2=%08x, fw_arg3=%08x\n",
 284                         (unsigned int)fw_arg0, (unsigned int)fw_arg1,
 285                         (unsigned int)fw_arg2, (unsigned int)fw_arg3);
 286
 287
 288         ar71xx_mach = AR71XX_MACH_GENERIC;
 289
 290         if (ar71xx_prom_init_myloader())
 291                 return;
 292
 293         ar71xx_prom_init_cmdline(fw_arg0, (char **)fw_arg1);
 294
 295         envp = (char **)fw_arg2;
 296         ar71xx_prom_find_env(envp, "board");
 297         ar71xx_prom_find_env(envp, "ethaddr");
 298 }
 299
 300 void __init prom_free_prom_memory(void)
 301 {
 302         /* We do not have to prom memory to free */
 303 }