target/linux/ifxmips/files/arch/mips/ifxmips/board.c

   1 /*
   2  *   This program is free software; you can redistribute it and/or modify
   3  *   it under the terms of the GNU General Public License as published by
   4  *   the Free Software Foundation; either version 2 of the License, or
   5  *   (at your option) any later version.
   6  *
   7  *   This program is distributed in the hope that it will be useful,
   8  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  *   GNU General Public License for more details.
  11  *
  12  *   You should have received a copy of the GNU General Public License
  13  *   along with this program; if not, write to the Free Software
  14  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  15  *
  16  *   Copyright (C) 2007 John Crispin <blogic@openwrt.org>
  17  */
  18
  19 #include <linux/autoconf.h>
  20 #include <linux/init.h>
  21 #include <linux/module.h>
  22 #include <linux/types.h>
  23 #include <linux/string.h>
  24 #include <linux/mtd/physmap.h>
  25 #include <linux/kernel.h>
  26 #include <linux/reboot.h>
  27 #include <linux/platform_device.h>
  28 #include <asm/bootinfo.h>
  29 #include <asm/reboot.h>
  30 #include <asm/time.h>
  31 #include <asm/irq.h>
  32 #include <asm/io.h>
  33 #include <linux/etherdevice.h>
  34 #include <asm/ifxmips/ifxmips.h>
  35
  36 #define MAX_BOARD_NAME_LEN              32
  37 #define MAX_IFXMIPS_DEVS                9
  38
  39 #define SYSTEM_DANUBE                   "Danube"
  40 #define SYSTEM_DANUBE_CHIPID1   0x10129083
  41 #define SYSTEM_DANUBE_CHIPID2   0x3012B083
  42
  43 #define SYSTEM_TWINPASS                 "Twinpass"
  44 #define SYSTEM_TWINPASS_CHIPID  0x3012D083
  45
  46 extern int ifxmips_pci_external_clock;
  47
  48 static unsigned int chiprev;
  49 static int cmdline_mac = 0;
  50 char board_name[MAX_BOARD_NAME_LEN + 1] = { 0 };
  51
  52 struct ifxmips_board {
  53         char name[32];
  54         unsigned int system_type;
  55         struct platform_device *devs[MAX_IFXMIPS_DEVS];
  56         struct resource reset_resource;
  57         struct resource gpiodev_resource;
  58         int pci_external_clock;
  59         int num_devs;
  60 };
  61
  62 spinlock_t ebu_lock = SPIN_LOCK_UNLOCKED;
  63 EXPORT_SYMBOL_GPL(ebu_lock);
  64
  65 static unsigned char ifxmips_mii_mac[6];
  66 static int ifxmips_brn = 0;
  67
  68 static struct platform_device
  69 ifxmips_led =
  70 {
  71         .id = 0,
  72         .name = "ifxmips_led",
  73 };
  74
  75 static struct platform_device
  76 ifxmips_gpio =
  77 {
  78         .id = 0,
  79         .name = "ifxmips_gpio",
  80         .num_resources = 1,
  81 };
  82
  83 static struct platform_device
  84 ifxmips_mii =
  85 {
  86         .id = 0,
  87         .name = "ifxmips_mii0",
  88         .dev = {
  89                 .platform_data = ifxmips_mii_mac,
  90         }
  91 };
  92
  93 static struct platform_device
  94 ifxmips_wdt =
  95 {
  96         .id = 0,
  97         .name = "ifxmips_wdt",
  98 };
  99
 100 static struct resource
 101 ifxmips_mtd_resource = {
 102         .start  = IFXMIPS_FLASH_START,
 103         .end    = IFXMIPS_FLASH_START + IFXMIPS_FLASH_MAX - 1,
 104         .flags  = IORESOURCE_MEM,
 105 };
 106
 107 static struct platform_device
 108 ifxmips_mtd =
 109 {
 110         .id = 0,
 111         .name = "ifxmips_mtd",
 112         .num_resources  = 1,
 113         .resource   = &ifxmips_mtd_resource,
 114 };
 115
 116 static struct platform_device
 117 ifxmips_gpio_dev = {
 118         .name     = "GPIODEV",
 119         .id     = -1,
 120         .num_resources    =     1,
 121 };
 122
 123 const char*
 124 get_system_type(void)
 125 {
 126         chiprev = ifxmips_r32(IFXMIPS_MPS_CHIPID);
 127         switch(chiprev)
 128         {
 129         case SYSTEM_DANUBE_CHIPID1:
 130         case SYSTEM_DANUBE_CHIPID2:
 131                 return SYSTEM_DANUBE;
 132
 133         case SYSTEM_TWINPASS_CHIPID:
 134                 return SYSTEM_TWINPASS;
 135         }
 136
 137         return BOARD_SYSTEM_TYPE;
 138 }
 139
 140 static int __init
 141 ifxmips_set_board_type(char *str)
 142 {
 143         str = strchr(str, '=');
 144         if(!str)
 145                 goto out;
 146         str++;
 147         if(strlen(str) > MAX_BOARD_NAME_LEN)
 148                 goto out;
 149         strncpy(board_name, str, MAX_BOARD_NAME_LEN);
 150         printk("bootloader told us, that this is a %s board\n", board_name);
 151 out:
 152         return 1;
 153 }
 154 __setup("ifxmips_board", ifxmips_set_board_type);
 155
 156 #define IS_HEX(x) \
 157         (((x >='0' && x <= '9') || (x >='a' && x <= 'f') || (x >='A' && x <= 'F'))?(1):(0))
 158
 159 static int __init
 160 ifxmips_set_mii0_mac(char *str)
 161 {
 162         int i;
 163         str = strchr(str, '=');
 164         if(!str)
 165                 goto out;
 166         str++;
 167         if(strlen(str) != 17)
 168                 goto out;
 169         for(i = 0; i < 6; i++)
 170         {
 171                 if(!IS_HEX(str[3 * i]) || !IS_HEX(str[(3 * i) + 1]))
 172                         goto out;
 173                 if((i != 5) && (str[(3 * i) + 2] != ':'))
 174                         goto out;
 175                 ifxmips_mii_mac[i] = simple_strtoul(&str[3 * i], NULL, 16);
 176         }
 177         if(is_valid_ether_addr(ifxmips_mii_mac))
 178                 cmdline_mac = 1;
 179 out:
 180         return 1;
 181 }
 182 __setup("mii0_mac", ifxmips_set_mii0_mac);
 183
 184
 185 static struct ifxmips_board boards[] =
 186 {
 187         {
 188                 .name = "EASY50712",
 189                 .system_type = SYSTEM_DANUBE_CHIPID1,
 190                 .devs =
 191                 {
 192                         &ifxmips_led, &ifxmips_gpio, &ifxmips_mii,
 193                         &ifxmips_mtd, &ifxmips_wdt, &ifxmips_gpio_dev,
 194                 },
 195                 .reset_resource =
 196                 {
 197                         .name = "reset",
 198                         .start = 1,
 199                         .end = 15,
 200                 },
 201                 .gpiodev_resource =
 202                 {
 203                         .name = "gpio",
 204                         .start = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3) |
 205                                         (1 << 4) | (1 << 5) | (1 << 8) | (1 << 9) | (1 << 12),
 206                         .end = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3) |
 207                                         (1 << 4) | (1 << 5) | (1 << 8) | (1 << 9) | (1 << 12),
 208                 },
 209                 .num_devs = 6,
 210         }, {
 211                 .name = "EASY4010",
 212                 .system_type = SYSTEM_TWINPASS_CHIPID,
 213                 .devs =
 214                 {
 215                         &ifxmips_led, &ifxmips_gpio, &ifxmips_mii,
 216                         &ifxmips_mtd, &ifxmips_wdt, &ifxmips_gpio_dev,
 217                 },
 218                 .reset_resource =
 219                 {
 220                         .name = "reset",
 221                         .start = 1,
 222                         .end = 15,
 223                 },
 224                 .gpiodev_resource =
 225                 {
 226                         .name = "gpio",
 227                         .start = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3) |
 228                                         (1 << 4) | (1 << 5) | (1 << 8) | (1 << 9) | (1 << 12),
 229                         .end = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3) |
 230                                         (1 << 4) | (1 << 5) | (1 << 8) | (1 << 9) | (1 << 12),
 231                 },
 232                 .num_devs = 6,
 233         }, {
 234                 .name = "ARV4519",
 235                 .system_type = SYSTEM_DANUBE_CHIPID2,
 236                 .devs =
 237                 {
 238                         &ifxmips_led, &ifxmips_gpio, &ifxmips_mii,
 239                         &ifxmips_mtd, &ifxmips_wdt, &ifxmips_gpio_dev,
 240                 },
 241                 .reset_resource =
 242                 {
 243                         .name = "reset",
 244                         .start = 1,
 245                         .end = 12,
 246                 },
 247                 .gpiodev_resource =
 248                 {
 249                         .name = "gpio",
 250                         .start = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3) |
 251                                         (1 << 4) | (1 << 5) | (1 << 8) | (1 << 9) | (1 << 12),
 252                         .end = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3) |
 253                                         (1 << 4) | (1 << 5) | (1 << 8) | (1 << 9) | (1 << 12),
 254                 },
 255                 .pci_external_clock = 1,
 256                 .num_devs = 6,
 257         },
 258 };
 259
 260 int
 261 ifxmips_find_brn_block(void){
 262         unsigned char temp[8];
 263         memcpy_fromio(temp, (void*)KSEG1ADDR(IFXMIPS_FLASH_START + 0x800000 - 0x10000), 8);
 264         if(memcmp(temp, "BRN-BOOT", 8) == 0)
 265         {
 266                 if(!cmdline_mac)
 267                         memcpy_fromio(ifxmips_mii_mac, (void*)KSEG1ADDR(IFXMIPS_FLASH_START + 0x800000 - 0x10000 + 0x16), 6);
 268                 cmdline_mac = 1;
 269                 return 1;
 270         } else {
 271                 return 0;
 272         }
 273 }
 274
 275 int
 276 ifxmips_has_brn_block(void)
 277 {
 278         return ifxmips_brn;
 279 }
 280
 281 struct ifxmips_board*
 282 ifxmips_find_board(void)
 283 {
 284         int i;
 285         if(!*board_name)
 286                 return 0;
 287         for(i = 0; i < ARRAY_SIZE(boards); i++)
 288                 if((boards[i].system_type == chiprev) && (!strcmp(boards[i].name, board_name)))
 289                         return &boards[i];
 290         return 0;
 291 }
 292
 293 int __init
 294 ifxmips_init_devices(void)
 295 {
 296         struct ifxmips_board *board = ifxmips_find_board();
 297
 298         chiprev = ifxmips_r32(IFXMIPS_MPS_CHIPID);
 299         ifxmips_brn = ifxmips_find_brn_block();
 300
 301         if(!cmdline_mac)
 302                 random_ether_addr(ifxmips_mii_mac);
 303
 304         if(!board)
 305         {
 306                 switch(chiprev)
 307                 {
 308                 case SYSTEM_DANUBE_CHIPID1:
 309                 case SYSTEM_DANUBE_CHIPID2:
 310                         board = &boards[0];
 311                         break;
 312                 case SYSTEM_TWINPASS_CHIPID:
 313                         board = &boards[1];
 314                         break;
 315                 }
 316         }
 317         ifxmips_gpio.resource = &board->reset_resource;
 318         ifxmips_gpio_dev.resource = &board->gpiodev_resource;
 319         if(board->pci_external_clock)
 320                 ifxmips_pci_external_clock = 1;
 321         printk("using board definition %s\n", board->name);
 322         return platform_add_devices(board->devs, board->num_devs);
 323 }
 324
 325 arch_initcall(ifxmips_init_devices);