board/amcc/canyonlands/bootstrap.c

   1 /*
   2  * (C) Copyright 2008
   3  * Stefan Roese, DENX Software Engineering, sr@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  *
  23  */
  24
  25 #include <common.h>
  26 #include <command.h>
  27 #include <i2c.h>
  28 #include <asm/io.h>
  29
  30 /*
  31  * NOR and NAND boot options change bytes 5, 6, 8, 9, 11. The
  32  * values are independent of the rest of the clock settings.
  33  */
  34
  35 #define NAND_COMPATIBLE 0x01
  36 #define NOR_COMPATIBLE  0x02
  37
  38 #define I2C_EEPROM_ADDR 0x52
  39
  40 static char *config_labels[] = {
  41         "CPU: 600 PLB: 200 OPB: 100 EBC: 100",
  42         "CPU: 800 PLB: 200 OPB: 100 EBC: 100",
  43         NULL
  44 };
  45
  46 static u8 boot_configs[][17] = {
  47         {
  48                 (NAND_COMPATIBLE | NOR_COMPATIBLE),
  49                 0x86, 0x80, 0xce, 0x1f, 0x79, 0x80, 0x00, 0xa0, 0x40, 0x08,
  50                 0x23, 0x50, 0x0d, 0x05, 0x00, 0x00
  51         },
  52         {
  53                 (NAND_COMPATIBLE | NOR_COMPATIBLE),
  54                 0x86, 0x80, 0xba, 0x14, 0x99, 0x80, 0x00, 0xa0, 0x40, 0x08,
  55                 0x23, 0x50, 0x0d, 0x05, 0x00, 0x00
  56         },
  57         {
  58                 0,
  59                 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
  60         }
  61 };
  62
  63 /*
  64  * Bytes 5,6,8,9,11 change for NAND boot
  65  */
  66 #if 0
  67 /*
  68  * Values for 512 page size NAND chips, not used anymore, just
  69  * keep them here for reference
  70  */
  71 static u8 nand_boot[] = {
  72         0x90, 0x01,  0xa0, 0x68, 0x58
  73 };
  74 #else
  75 /*
  76  * Values for 2k page size NAND chips
  77  */
  78 static u8 nand_boot[] = {
  79         0x90, 0x01,  0xa0, 0xe8, 0x58
  80 };
  81 #endif
  82
  83 static int do_bootstrap(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  84 {
  85         u8 *buf, b_nand;
  86         int x, y, nbytes, selcfg;
  87         extern char console_buffer[];
  88
  89         if (argc < 2) {
  90                 printf("Usage:\n%s\n", cmdtp->usage);
  91                 return 1;
  92         }
  93
  94         if ((strcmp(argv[1], "nor") != 0) &&
  95             (strcmp(argv[1], "nand") != 0)) {
  96                 printf("Unsupported boot-device - only nor|nand support\n");
  97                 return 1;
  98         }
  99
 100         /* set the nand flag based on provided input */
 101         if ((strcmp(argv[1], "nand") == 0))
 102                 b_nand = 1;
 103         else
 104                 b_nand = 0;
 105
 106         printf("Available configurations: \n\n");
 107
 108         if (b_nand) {
 109                 for(x = 0, y = 0; boot_configs[x][0] != 0; x++) {
 110                         /* filter on nand compatible */
 111                         if (boot_configs[x][0] & NAND_COMPATIBLE) {
 112                                 printf(" %d - %s\n", (y+1), config_labels[x]);
 113                                 y++;
 114                         }
 115                 }
 116         } else {
 117                 for(x = 0, y = 0; boot_configs[x][0] != 0; x++) {
 118                         /* filter on nor compatible */
 119                         if (boot_configs[x][0] & NOR_COMPATIBLE) {
 120                                 printf(" %d - %s\n", (y+1), config_labels[x]);
 121                                 y++;
 122                         }
 123                 }
 124         }
 125
 126         do {
 127                 nbytes = readline(" Selection [1-x / quit]: ");
 128
 129                 if (nbytes) {
 130                         if (strcmp(console_buffer, "quit") == 0)
 131                                 return 0;
 132                         selcfg = simple_strtol(console_buffer, NULL, 10);
 133                         if ((selcfg < 1) || (selcfg > y))
 134                                 nbytes = 0;
 135                 }
 136         } while (nbytes == 0);
 137
 138
 139         y = (selcfg - 1);
 140
 141         for (x = 0; boot_configs[x][0] != 0; x++) {
 142                 if (b_nand) {
 143                         if (boot_configs[x][0] & NAND_COMPATIBLE) {
 144                                 if (y > 0)
 145                                         y--;
 146                                 else if (y < 1)
 147                                         break;
 148                         }
 149                 } else {
 150                         if (boot_configs[x][0] & NOR_COMPATIBLE) {
 151                                 if (y > 0)
 152                                         y--;
 153                                 else if (y < 1)
 154                                         break;
 155                         }
 156                 }
 157         }
 158
 159         buf = &boot_configs[x][1];
 160
 161         if (b_nand) {
 162                 buf[5] = nand_boot[0];
 163                 buf[6] = nand_boot[1];
 164                 buf[8] = nand_boot[2];
 165                 buf[9] = nand_boot[3];
 166                 buf[11] = nand_boot[4];
 167         }
 168
 169         if (i2c_write(I2C_EEPROM_ADDR, 0, 1, buf, 16) != 0)
 170                 printf("Error writing to EEPROM at address 0x%x\n", I2C_EEPROM_ADDR);
 171         udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
 172
 173         printf("Done\n");
 174         printf("Please power-cycle the board for the changes to take effect\n");
 175
 176         return 0;
 177 }
 178
 179 U_BOOT_CMD(
 180         bootstrap,      2,      0,      do_bootstrap,
 181         "bootstrap - program the I2C bootstrap EEPROM\n",
 182         "<nand|nor> - strap to boot from NAND or NOR flash\n"
 183         );