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/*
* Miscelaneous DaVinci functions.
*
* Copyright (C) 2009 Nick Thompson, GE Fanuc Ltd, <nick.thompson@gefanuc.com>
* 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 <net.h>
#include <asm/arch/hardware.h>
#include <asm/io.h>
#include "misc.h"
DECLARE_GLOBAL_DATA_PTR;
int dram_init(void)
{
/* dram_init must store complete ramsize in gd->ram_size */
gd->ram_size = get_ram_size(
(volatile void *)CONFIG_SYS_SDRAM_BASE,
CONFIG_MAX_RAM_BANK_SIZE);
return 0;
}
void dram_init_banksize(void)
{
gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
gd->bd->bi_dram[0].size = gd->ram_size;
}
#ifdef CONFIG_DRIVER_TI_EMAC
/* 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 CONFIG_SYS_I2C_EEPROM_ADDR
/* Read MAC address. */
if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0x7F00, CONFIG_SYS_I2C_EEPROM_ADDR_LEN,
(uint8_t *) &buf[0], 6))
goto i2cerr;
/* Check that MAC address is valid. */
if (!is_valid_ether_addr(buf))
goto err;
return 1; /* Found */
i2cerr:
printf("Read from EEPROM @ 0x%02x failed\n", CONFIG_SYS_I2C_EEPROM_ADDR);
err:
#endif /* CONFIG_SYS_I2C_EEPROM_ADDR */
return 0;
}
/*
* If there is no MAC address in the environment, then it will be initialized
* (silently) from the value in the EEPROM.
*/
void davinci_sync_env_enetaddr(uint8_t *rom_enetaddr)
{
uint8_t env_enetaddr[6];
eth_getenv_enetaddr_by_index(0, env_enetaddr);
if (!memcmp(env_enetaddr, "\0\0\0\0\0\0", 6)) {
/* There is no MAC address in the environment, so we initialize
* it from the value in the EEPROM. */
debug("### Setting environment from EEPROM MAC address = "
"\"%pM\"\n",
env_enetaddr);
eth_setenv_enetaddr("ethaddr", rom_enetaddr);
}
}
#endif /* DAVINCI_EMAC */
/*
* Change the setting of a pin multiplexer field.
*
* Takes an array of pinmux settings similar to:
*
* struct pinmux_config uart_pins[] = {
* { &davinci_syscfg_regs->pinmux[8], 2, 7 },
* { &davinci_syscfg_regs->pinmux[9], 2, 0 }
* };
*
* Stepping through the array, each pinmux[n] register has the given value
* set in the pin mux field specified.
*
* The number of pins in the array must be passed (ARRAY_SIZE can provide
* this value conveniently).
*
* Returns 0 if all field numbers and values are in the correct range,
* else returns -1.
*/
int davinci_configure_pin_mux(const struct pinmux_config *pins,
const int n_pins)
{
int i;
/* check for invalid pinmux values */
for (i = 0; i < n_pins; i++) {
if (pins[i].field >= PIN_MUX_NUM_FIELDS ||
(pins[i].value & ~PIN_MUX_FIELD_MASK) != 0)
return -1;
}
/* configure the pinmuxes */
for (i = 0; i < n_pins; i++) {
const int offset = pins[i].field * PIN_MUX_FIELD_SIZE;
const unsigned int value = pins[i].value << offset;
const unsigned int mask = PIN_MUX_FIELD_MASK << offset;
const dv_reg *mux = pins[i].mux;
writel(value | (readl(mux) & (~mask)), mux);
}
return 0;
}
/*
* Configure multiple pinmux resources.
*
* Takes an pinmux_resource array of pinmux_config and pin counts:
*
* const struct pinmux_resource pinmuxes[] = {
* PINMUX_ITEM(uart_pins),
* PINMUX_ITEM(i2c_pins),
* };
*
* The number of items in the array must be passed (ARRAY_SIZE can provide
* this value conveniently).
*
* Each item entry is configured in the defined order. If configuration
* of any item fails, -1 is returned and none of the following items are
* configured. On success, 0 is returned.
*/
int davinci_configure_pin_mux_items(const struct pinmux_resource *item,
const int n_items)
{
int i;
for (i = 0; i < n_items; i++) {
if (davinci_configure_pin_mux(item[i].pins,
item[i].n_pins) != 0)
return -1;
}
return 0;
}
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