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           = "TEW-632BRP",
  63                 .mach_type      = AR71XX_MACH_TEW_632BRP,
  64         }, {
  65                 .name           = "TL-WR741ND",
  66                 .mach_type      = AR71XX_MACH_TL_WR741ND,
  67         }, {
  68                 .name           = "TL-WR941ND",
  69                 .mach_type      = AR71XX_MACH_TL_WR941ND,
  70         }, {
  71                 .name           = "UBNT-RS",
  72                 .mach_type      = AR71XX_MACH_UBNT_RS,
  73         }, {
  74                 .name           = "UBNT-RSPRO",
  75                 .mach_type      = AR71XX_MACH_UBNT_RSPRO,
  76         }, {
  77                 .name           = "Ubiquiti AR71xx-based board",
  78                 .mach_type      = AR71XX_MACH_UBNT_RS,
  79         }, {
  80                 .name           = "UBNT-LS-SR71",
  81                 .mach_type      = AR71XX_MACH_UBNT_LSSR71,
  82         }, {
  83                 .name           = "UBNT-LSX",
  84                 .mach_type      = AR71XX_MACH_UBNT_LSX,
  85         }, {
  86                 .name           = "WNR2000",
  87                 .mach_type      = AR71XX_MACH_WNR2000,
  88         }, {
  89                 .name           = "WRT160NL",
  90                 .mach_type      = AR71XX_MACH_WRT160NL,
  91         }, {
  92                 .name           = "WP543",
  93                 .mach_type      = AR71XX_MACH_WP543,
  94         }, {
  95                 .name           = "WRT400N",
  96                 .mach_type      = AR71XX_MACH_WRT400N,
  97         }, {
  98                 .name           = "PB42",
  99                 .mach_type      = AR71XX_MACH_PB42,
 100         }, {
 101                 .name           = "PB44",
 102                 .mach_type      = AR71XX_MACH_PB44,
 103         }, {
 104                 .name           = "MZK-W300NH",
 105                 .mach_type      = AR71XX_MACH_MZK_W300NH,
 106         }, {
 107                 .name           = "MZK-W04NU",
 108                 .mach_type      = AR71XX_MACH_MZK_W04NU,
 109         }
 110 };
 111
 112 static int __init ar71xx_board_setup(char *name)
 113 {
 114         int i;
 115
 116         for (i = 0; i < ARRAY_SIZE(boards); i++)
 117                 if (strcmp(name, boards[i].name) == 0) {
 118                         ar71xx_mach = boards[i].mach_type;
 119                         break;
 120                 }
 121
 122         return 1;
 123 }
 124 __setup("board=", ar71xx_board_setup);
 125
 126 static int __init ar71xx_ethaddr_setup(char *str)
 127 {
 128         ar71xx_parse_mac_addr(str);
 129         return 1;
 130 }
 131 __setup("ethaddr=", ar71xx_ethaddr_setup);
 132
 133 static int __init ar71xx_kmac_setup(char *str)
 134 {
 135         ar71xx_parse_mac_addr(str);
 136         return 1;
 137 }
 138 __setup("kmac=", ar71xx_kmac_setup);
 139
 140 static inline int is_valid_ram_addr(void *addr)
 141 {
 142         if (((u32) addr > KSEG0) &&
 143             ((u32) addr < (KSEG0 + AR71XX_MEM_SIZE_MAX)))
 144                 return 1;
 145
 146         if (((u32) addr > KSEG1) &&
 147             ((u32) addr < (KSEG1 + AR71XX_MEM_SIZE_MAX)))
 148                 return 1;
 149
 150         return 0;
 151 }
 152
 153 static void __init ar71xx_prom_append_cmdline(const char *name,
 154                                               const char *value)
 155 {
 156         char buf[CL_SIZE];
 157
 158         snprintf(buf, sizeof(buf), " %s=%s", name, value);
 159         strlcat(arcs_cmdline, buf, sizeof(arcs_cmdline));
 160 }
 161
 162 static void __init ar71xx_prom_find_env(char **envp, const char *name)
 163 {
 164         int len = strlen(name);
 165         char **p;
 166
 167         if (!is_valid_ram_addr(envp))
 168                 return;
 169
 170         for (p = envp; is_valid_ram_addr(*p); p++) {
 171                 if (strncmp(name, *p, len) == 0 && (*p)[len] == '=') {
 172                         ar71xx_prom_append_cmdline(name, *p + len + 1);
 173                         break;
 174                 }
 175
 176                 /* RedBoot env comes in pointer pairs - key, value */
 177                 if (strncmp(name, *p, len) == 0 && (*p)[len] == 0)
 178                         if (is_valid_ram_addr(*(++p))) {
 179                                 ar71xx_prom_append_cmdline(name, *p);
 180                                 break;
 181                         }
 182         }
 183 }
 184
 185 static int __init ar71xx_prom_init_myloader(void)
 186 {
 187         struct myloader_info *mylo;
 188         char mac_buf[32];
 189         char *mac;
 190
 191         mylo = myloader_get_info();
 192         if (!mylo)
 193                 return 0;
 194
 195         switch (mylo->did) {
 196         case DEVID_COMPEX_WP543:
 197                 ar71xx_prom_append_cmdline("board", "WP543");
 198                 break;
 199         default:
 200                 printk(KERN_WARNING "prom: unknown device id: %x\n",
 201                                 mylo->did);
 202                 return 0;
 203         }
 204
 205         mac = mylo->macs[0];
 206         snprintf(mac_buf, sizeof(mac_buf), "%02x:%02x:%02x:%02x:%02x:%02x",
 207                  mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 208
 209         ar71xx_prom_append_cmdline("ethaddr", mac_buf);
 210
 211         return 1;
 212 }
 213
 214 #ifdef CONFIG_IMAGE_CMDLINE_HACK
 215 extern char __image_cmdline[];
 216
 217 static int __init ar71xx_use__image_cmdline(void)
 218 {
 219         char *p = __image_cmdline;
 220         int replace = 0;
 221
 222         if (*p == '-') {
 223                 replace = 1;
 224                 p++;
 225         }
 226
 227         if (*p == '\0')
 228                 return 0;
 229
 230         if (replace) {
 231                 strlcpy(arcs_cmdline, p, sizeof(arcs_cmdline));
 232         } else {
 233                 strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
 234                 strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
 235         }
 236
 237         return 1;
 238 }
 239 #else
 240 static int inline ar71xx_use__image_cmdline(void) { return 0; }
 241 #endif
 242
 243 static __init void ar71xx_prom_init_cmdline(int argc, char **argv)
 244 {
 245         int i;
 246
 247         if (ar71xx_use__image_cmdline())
 248                 return;
 249
 250         if (!is_valid_ram_addr(argv))
 251                 return;
 252
 253         for (i = 0; i < argc; i++)
 254                 if (is_valid_ram_addr(argv[i])) {
 255                         strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
 256                         strlcat(arcs_cmdline, argv[i], sizeof(arcs_cmdline));
 257                 }
 258 }
 259
 260 void __init prom_init(void)
 261 {
 262         char **envp;
 263
 264         printk(KERN_DEBUG "prom: fw_arg0=%08x, fw_arg1=%08x, "
 265                         "fw_arg2=%08x, fw_arg3=%08x\n",
 266                         (unsigned int)fw_arg0, (unsigned int)fw_arg1,
 267                         (unsigned int)fw_arg2, (unsigned int)fw_arg3);
 268
 269
 270         ar71xx_mach = AR71XX_MACH_GENERIC;
 271
 272         if (ar71xx_prom_init_myloader())
 273                 return;
 274
 275         ar71xx_prom_init_cmdline(fw_arg0, (char **)fw_arg1);
 276
 277         envp = (char **)fw_arg2;
 278         ar71xx_prom_find_env(envp, "board");
 279         ar71xx_prom_find_env(envp, "ethaddr");
 280 }
 281
 282 void __init prom_free_prom_memory(void)
 283 {
 284         /* We do not have to prom memory to free */
 285 }