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 "machtype.h"
  24 #include "devices.h"
  25
  26 struct board_rec {
  27         char                    *name;
  28         enum ar71xx_mach_type   mach_type;
  29 };
  30
  31 static struct board_rec boards[] __initdata = {
  32         {
  33                 .name           = "411",
  34                 .mach_type      = AR71XX_MACH_RB_411,
  35         }, {
  36                 .name           = "411U",
  37                 .mach_type      = AR71XX_MACH_RB_411U,
  38         }, {
  39                 .name           = "433",
  40                 .mach_type      = AR71XX_MACH_RB_433,
  41         }, {
  42                 .name           = "433U",
  43                 .mach_type      = AR71XX_MACH_RB_433U,
  44         }, {
  45                 .name           = "450",
  46                 .mach_type      = AR71XX_MACH_RB_450,
  47         }, {
  48                 .name           = "450G",
  49                 .mach_type      = AR71XX_MACH_RB_450G,
  50         }, {
  51                 .name           = "493",
  52                 .mach_type      = AR71XX_MACH_RB_493,
  53         }, {
  54                 .name           = "AP81",
  55                 .mach_type      = AR71XX_MACH_AP81,
  56         }, {
  57                 .name           = "AP83",
  58                 .mach_type      = AR71XX_MACH_AP83,
  59         }, {
  60                 .name           = "AW-NR580",
  61                 .mach_type      = AR71XX_MACH_AW_NR580,
  62         }, {
  63                 .name           = "DIR-825-B1",
  64                 .mach_type      = AR71XX_MACH_DIR_825_B1,
  65         }, {
  66                 .name           = "TEW-632BRP",
  67                 .mach_type      = AR71XX_MACH_TEW_632BRP,
  68         }, {
  69                 .name           = "DIR-615-C1",
  70                 .mach_type      = AR71XX_MACH_DIR_615_C1,
  71         }, {
  72                 .name           = "TL-WR741ND",
  73                 .mach_type      = AR71XX_MACH_TL_WR741ND,
  74         }, {
  75                 .name           = "TL-WR841N-v1.5",
  76                 .mach_type      = AR71XX_MACH_TL_WR841N_V1,
  77         }, {
  78                 .name           = "TL-WR941ND",
  79                 .mach_type      = AR71XX_MACH_TL_WR941ND,
  80         }, {
  81                 .name           = "TL-WR1043ND",
  82                 .mach_type      = AR71XX_MACH_TL_WR1043ND,
  83         }, {
  84                 .name           = "UBNT-RS",
  85                 .mach_type      = AR71XX_MACH_UBNT_RS,
  86         }, {
  87                 .name           = "UBNT-RSPRO",
  88                 .mach_type      = AR71XX_MACH_UBNT_RSPRO,
  89         }, {
  90                 .name           = "Ubiquiti AR71xx-based board",
  91                 .mach_type      = AR71XX_MACH_UBNT_RS,
  92         }, {
  93                 .name           = "UBNT-LS-SR71",
  94                 .mach_type      = AR71XX_MACH_UBNT_LSSR71,
  95         }, {
  96                 .name           = "UBNT-LSX",
  97                 .mach_type      = AR71XX_MACH_UBNT_LSX,
  98         }, {
  99                 .name           = "UBNT-BM",
 100                 .mach_type      = AR71XX_MACH_UBNT_BULLET_M,
 101         }, {
 102                 .name           = "UBNT-RM",
 103                 .mach_type      = AR71XX_MACH_UBNT_ROCKET_M,
 104         }, {
 105                 .name           = "UBNT-NM",
 106                 .mach_type      = AR71XX_MACH_UBNT_NANO_M,
 107         }, {
 108                 .name           = "WNDR3700",
 109                 .mach_type      = AR71XX_MACH_WNDR3700,
 110         }, {
 111                 .name           = "WNR2000",
 112                 .mach_type      = AR71XX_MACH_WNR2000,
 113         }, {
 114                 .name           = "WRT160NL",
 115                 .mach_type      = AR71XX_MACH_WRT160NL,
 116         }, {
 117                 .name           = "WP543",
 118                 .mach_type      = AR71XX_MACH_WP543,
 119         }, {
 120                 .name           = "WRT400N",
 121                 .mach_type      = AR71XX_MACH_WRT400N,
 122         }, {
 123                 .name           = "PB42",
 124                 .mach_type      = AR71XX_MACH_PB42,
 125         }, {
 126                 .name           = "PB44",
 127                 .mach_type      = AR71XX_MACH_PB44,
 128         }, {
 129                 .name           = "MZK-W300NH",
 130                 .mach_type      = AR71XX_MACH_MZK_W300NH,
 131         }, {
 132                 .name           = "MZK-W04NU",
 133                 .mach_type      = AR71XX_MACH_MZK_W04NU,
 134         }
 135 };
 136
 137 static int __init ar71xx_board_setup(char *name)
 138 {
 139         int i;
 140
 141         for (i = 0; i < ARRAY_SIZE(boards); i++)
 142                 if (strcmp(name, boards[i].name) == 0) {
 143                         ar71xx_mach = boards[i].mach_type;
 144                         break;
 145                 }
 146
 147         return 1;
 148 }
 149 __setup("board=", ar71xx_board_setup);
 150
 151 static int __init ar71xx_ethaddr_setup(char *str)
 152 {
 153         ar71xx_parse_mac_addr(str);
 154         return 1;
 155 }
 156 __setup("ethaddr=", ar71xx_ethaddr_setup);
 157
 158 static int __init ar71xx_kmac_setup(char *str)
 159 {
 160         ar71xx_parse_mac_addr(str);
 161         return 1;
 162 }
 163 __setup("kmac=", ar71xx_kmac_setup);
 164
 165 static inline int is_valid_ram_addr(void *addr)
 166 {
 167         if (((u32) addr > KSEG0) &&
 168             ((u32) addr < (KSEG0 + AR71XX_MEM_SIZE_MAX)))
 169                 return 1;
 170
 171         if (((u32) addr > KSEG1) &&
 172             ((u32) addr < (KSEG1 + AR71XX_MEM_SIZE_MAX)))
 173                 return 1;
 174
 175         return 0;
 176 }
 177
 178 static void __init ar71xx_prom_append_cmdline(const char *name,
 179                                               const char *value)
 180 {
 181         char buf[CL_SIZE];
 182
 183         snprintf(buf, sizeof(buf), " %s=%s", name, value);
 184         strlcat(arcs_cmdline, buf, sizeof(arcs_cmdline));
 185 }
 186
 187 static void __init ar71xx_prom_find_env(char **envp, const char *name)
 188 {
 189         int len = strlen(name);
 190         char **p;
 191
 192         if (!is_valid_ram_addr(envp))
 193                 return;
 194
 195         for (p = envp; is_valid_ram_addr(*p); p++) {
 196                 if (strncmp(name, *p, len) == 0 && (*p)[len] == '=') {
 197                         ar71xx_prom_append_cmdline(name, *p + len + 1);
 198                         break;
 199                 }
 200
 201                 /* RedBoot env comes in pointer pairs - key, value */
 202                 if (strncmp(name, *p, len) == 0 && (*p)[len] == 0)
 203                         if (is_valid_ram_addr(*(++p))) {
 204                                 ar71xx_prom_append_cmdline(name, *p);
 205                                 break;
 206                         }
 207         }
 208 }
 209
 210 static int __init ar71xx_prom_init_myloader(void)
 211 {
 212         struct myloader_info *mylo;
 213         char mac_buf[32];
 214         char *mac;
 215
 216         mylo = myloader_get_info();
 217         if (!mylo)
 218                 return 0;
 219
 220         switch (mylo->did) {
 221         case DEVID_COMPEX_WP543:
 222                 ar71xx_prom_append_cmdline("board", "WP543");
 223                 break;
 224         default:
 225                 printk(KERN_WARNING "prom: unknown device id: %x\n",
 226                                 mylo->did);
 227                 return 0;
 228         }
 229
 230         mac = mylo->macs[0];
 231         snprintf(mac_buf, sizeof(mac_buf), "%02x:%02x:%02x:%02x:%02x:%02x",
 232                  mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 233
 234         ar71xx_prom_append_cmdline("ethaddr", mac_buf);
 235
 236         return 1;
 237 }
 238
 239 #ifdef CONFIG_IMAGE_CMDLINE_HACK
 240 extern char __image_cmdline[];
 241
 242 static int __init ar71xx_use__image_cmdline(void)
 243 {
 244         char *p = __image_cmdline;
 245         int replace = 0;
 246
 247         if (*p == '-') {
 248                 replace = 1;
 249                 p++;
 250         }
 251
 252         if (*p == '\0')
 253                 return 0;
 254
 255         if (replace) {
 256                 strlcpy(arcs_cmdline, p, sizeof(arcs_cmdline));
 257         } else {
 258                 strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
 259                 strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
 260         }
 261
 262         return 1;
 263 }
 264 #else
 265 static int inline ar71xx_use__image_cmdline(void) { return 0; }
 266 #endif
 267
 268 static __init void ar71xx_prom_init_cmdline(int argc, char **argv)
 269 {
 270         int i;
 271
 272         if (ar71xx_use__image_cmdline())
 273                 return;
 274
 275         if (!is_valid_ram_addr(argv))
 276                 return;
 277
 278         for (i = 0; i < argc; i++)
 279                 if (is_valid_ram_addr(argv[i])) {
 280                         strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
 281                         strlcat(arcs_cmdline, argv[i], sizeof(arcs_cmdline));
 282                 }
 283 }
 284
 285 void __init prom_init(void)
 286 {
 287         char **envp;
 288
 289         printk(KERN_DEBUG "prom: fw_arg0=%08x, fw_arg1=%08x, "
 290                         "fw_arg2=%08x, fw_arg3=%08x\n",
 291                         (unsigned int)fw_arg0, (unsigned int)fw_arg1,
 292                         (unsigned int)fw_arg2, (unsigned int)fw_arg3);
 293
 294
 295         ar71xx_mach = AR71XX_MACH_GENERIC;
 296
 297         if (ar71xx_prom_init_myloader())
 298                 return;
 299
 300         ar71xx_prom_init_cmdline(fw_arg0, (char **)fw_arg1);
 301
 302         envp = (char **)fw_arg2;
 303         ar71xx_prom_find_env(envp, "board");
 304         ar71xx_prom_find_env(envp, "ethaddr");
 305 }
 306
 307 void __init prom_free_prom_memory(void)
 308 {
 309         /* We do not have to prom memory to free */
 310 }