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Diffstat (limited to 'board/davinci/common/misc.c')
| -rw-r--r-- | board/davinci/common/misc.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/board/davinci/common/misc.c b/board/davinci/common/misc.c new file mode 100644 index 0000000..71a3b87 --- /dev/null +++ b/board/davinci/common/misc.c @@ -0,0 +1,126 @@ +/* + * Miscelaneous DaVinci functions. + * + * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net> + * Copyright (C) 2008 Lyrtech <www.lyrtech.com> + * Copyright (C) 2004 Texas Instruments. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <common.h> +#include <i2c.h> +#include <asm/arch/hardware.h> + +DECLARE_GLOBAL_DATA_PTR; + +int dram_init(void) +{ + gd->bd->bi_dram[0].start = PHYS_SDRAM_1; + gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE; + + return(0); +} + +static int dv_get_pllm_output(uint32_t pllm) +{ + return (pllm + 1) * (CFG_HZ_CLOCK / 1000000); +} + +void dv_display_clk_infos(void) +{ + printf("ARM Clock: %dMHz\n", dv_get_pllm_output(REG(PLL1_PLLM)) / 2); + printf("DDR Clock: %dMHz\n", dv_get_pllm_output(REG(PLL2_PLLM)) / + ((REG(PLL2_DIV2) & 0x1f) + 1) / 2); +} + +/* Read ethernet MAC address from EEPROM for DVEVM compatible boards. + * Returns 1 if found, 0 otherwise. + */ +int dvevm_read_mac_address(uint8_t *buf) +{ +#ifdef CFG_I2C_EEPROM_ADDR + /* Read MAC address. */ + if (i2c_read(CFG_I2C_EEPROM_ADDR, 0x7F00, CFG_I2C_EEPROM_ADDR_LEN, + (uint8_t *) &buf[0], 6)) + goto i2cerr; + + /* Check that MAC address is not null. */ + if (memcmp(buf, "\0\0\0\0\0\0", 6) == 0) + goto err; + + return 1; /* Found */ + +i2cerr: + printf("Read from EEPROM @ 0x%02x failed\n", CFG_I2C_EEPROM_ADDR); +err: +#endif /* CFG_I2C_EEPROM_ADDR */ + + return 0; +} + +/* If there is a MAC address in the environment, and if it is not identical to + * the MAC address in the ROM, then a warning is printed and the MAC address + * from the environment is used. + * + * If there is no MAC address in the environment, then it will be initialized + * (silently) from the value in the ROM. + */ +void dv_configure_mac_address(uint8_t *rom_enetaddr) +{ + int i; + u_int8_t env_enetaddr[6]; + char *tmp = getenv("ethaddr"); + char *end; + + /* Read Ethernet MAC address from the U-Boot environment. + * If it is not defined, env_enetaddr[] will be cleared. */ + for (i = 0; i < 6; i++) { + env_enetaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0; + if (tmp) + tmp = (*end) ? end+1 : end; + } + + /* Check if ROM and U-Boot environment MAC addresses match. */ + if (memcmp(env_enetaddr, "\0\0\0\0\0\0", 6) != 0 && + memcmp(env_enetaddr, rom_enetaddr, 6) != 0) { + printf("Warning: MAC addresses don't match:\n"); + printf(" ROM MAC address: %02X:%02X:%02X:%02X:%02X:%02X\n", + rom_enetaddr[0], rom_enetaddr[1], + rom_enetaddr[2], rom_enetaddr[3], + rom_enetaddr[4], rom_enetaddr[5]); + printf(" \"ethaddr\" value: %02X:%02X:%02X:%02X:%02X:%02X\n", + env_enetaddr[0], env_enetaddr[1], + env_enetaddr[2], env_enetaddr[3], + env_enetaddr[4], env_enetaddr[5]) ; + debug("### Using MAC address from environment\n"); + } + if (!tmp) { + char ethaddr[20]; + + /* There is no MAC address in the environment, so we initialize + * it from the value in the ROM. */ + sprintf(ethaddr, "%02X:%02X:%02X:%02X:%02X:%02X", + rom_enetaddr[0], rom_enetaddr[1], + rom_enetaddr[2], rom_enetaddr[3], + rom_enetaddr[4], rom_enetaddr[5]) ; + debug("### Setting environment from ROM MAC address = \"%s\"\n", + ethaddr); + setenv("ethaddr", ethaddr); + } +} |