board/davinci/common/misc.c

   1 /*
   2  * Miscelaneous DaVinci functions.
   3  *
   4  * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
   5  * Copyright (C) 2008 Lyrtech <www.lyrtech.com>
   6  * Copyright (C) 2004 Texas Instruments.
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25
  26 #include <common.h>
  27 #include <i2c.h>
  28 #include <asm/arch/hardware.h>
  29
  30 DECLARE_GLOBAL_DATA_PTR;
  31
  32 int dram_init(void)
  33 {
  34         gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
  35         gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
  36
  37         return(0);
  38 }
  39
  40 static int dv_get_pllm_output(uint32_t pllm)
  41 {
  42         return (pllm + 1) * (CONFIG_SYS_HZ_CLOCK / 1000000);
  43 }
  44
  45 void dv_display_clk_infos(void)
  46 {
  47         printf("ARM Clock: %dMHz\n", dv_get_pllm_output(REG(PLL1_PLLM)) / 2);
  48         printf("DDR Clock: %dMHz\n", dv_get_pllm_output(REG(PLL2_PLLM)) /
  49                ((REG(PLL2_DIV2) & 0x1f) + 1) / 2);
  50 }
  51
  52 /* Read ethernet MAC address from EEPROM for DVEVM compatible boards.
  53  * Returns 1 if found, 0 otherwise.
  54  */
  55 int dvevm_read_mac_address(uint8_t *buf)
  56 {
  57 #ifdef CONFIG_SYS_I2C_EEPROM_ADDR
  58         /* Read MAC address. */
  59         if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0x7F00, CONFIG_SYS_I2C_EEPROM_ADDR_LEN,
  60                      (uint8_t *) &buf[0], 6))
  61                 goto i2cerr;
  62
  63         /* Check that MAC address is not null. */
  64         if (memcmp(buf, "\0\0\0\0\0\0", 6) == 0)
  65                 goto err;
  66
  67         return 1; /* Found */
  68
  69 i2cerr:
  70         printf("Read from EEPROM @ 0x%02x failed\n", CONFIG_SYS_I2C_EEPROM_ADDR);
  71 err:
  72 #endif /* CONFIG_SYS_I2C_EEPROM_ADDR */
  73
  74         return 0;
  75 }
  76
  77 /* If there is a MAC address in the environment, and if it is not identical to
  78  * the MAC address in the ROM, then a warning is printed and the MAC address
  79  * from the environment is used.
  80  *
  81  * If there is no MAC address in the environment, then it will be initialized
  82  * (silently) from the value in the ROM.
  83  */
  84 void dv_configure_mac_address(uint8_t *rom_enetaddr)
  85 {
  86         int i;
  87         u_int8_t env_enetaddr[6];
  88         char *tmp = getenv("ethaddr");
  89         char *end;
  90
  91         /* Read Ethernet MAC address from the U-Boot environment.
  92          * If it is not defined, env_enetaddr[] will be cleared. */
  93         for (i = 0; i < 6; i++) {
  94                 env_enetaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
  95                 if (tmp)
  96                         tmp = (*end) ? end+1 : end;
  97         }
  98
  99         /* Check if ROM and U-Boot environment MAC addresses match. */
 100         if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6) != 0 &&
 101             memcmp(env_enetaddr, rom_enetaddr, 6) != 0) {
 102                 printf("Warning: MAC addresses don't match:\n");
 103                 printf("  ROM MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n",
 104                        rom_enetaddr[0], rom_enetaddr[1],
 105                        rom_enetaddr[2], rom_enetaddr[3],
 106                        rom_enetaddr[4], rom_enetaddr[5]);
 107                 printf("  \"ethaddr\" value: %02X:%02X:%02X:%02X:%02X:%02X\n",
 108                        env_enetaddr[0], env_enetaddr[1],
 109                        env_enetaddr[2], env_enetaddr[3],
 110                        env_enetaddr[4], env_enetaddr[5]) ;
 111                 debug("### Using MAC address from environment\n");
 112         }
 113         if (!tmp) {
 114                 char ethaddr[20];
 115
 116                 /* There is no MAC address in the environment, so we initialize
 117                  * it from the value in the ROM. */
 118                 sprintf(ethaddr, "%02X:%02X:%02X:%02X:%02X:%02X",
 119                         rom_enetaddr[0], rom_enetaddr[1],
 120                         rom_enetaddr[2], rom_enetaddr[3],
 121                         rom_enetaddr[4], rom_enetaddr[5]) ;
 122                 debug("### Setting environment from ROM MAC address = \"%s\"\n",
 123                       ethaddr);
 124                 setenv("ethaddr", ethaddr);
 125         }
 126 }