7b37a27e14
This patch proposes to migrate the davinci_emac driver to using the eth_device->write_hwaddr function pointer as suggested by Ben Warren. All the davinci boards had the behaviour, prior to this patch, of sync'ing the environment variable enetaddr with the MAC address read from non-volatile storage on boot -- when the two locations disagreed, the environment variable value took precendence. This patch keeps the same behaviour but lets eth_initialize take care of it. This patch refactors davinci_emac setup in the boards so that the MAC address is read from non-volatile storage into the environment variable and then the environment variable value is use in eth_intialize. The only exception is the direct call to davinci_eth_set_mac_addr made by the da830evm board init which was changed into an assignment of the enetaddr field. Signed-off-by: Ben Gardiner <bengardiner@nanometrics.ca> Tested-by: Nick Thompson <nick.thompson@ge.com> Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
147 lines
4.3 KiB
C
147 lines
4.3 KiB
C
/*
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* Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
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*
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* Copyright (C) 2008 Lyrtech <www.lyrtech.com>
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* Copyright (C) 2008 Philip Balister, OpenSDR <philip@opensdr.com>
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*
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* Parts are shamelessly stolen from various TI sources, original copyright
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* follows:
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*
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* Copyright (C) 2004 Texas Instruments.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <common.h>
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#include <i2c.h>
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#include <asm/arch/hardware.h>
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#include "../common/misc.h"
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#define DAVINCI_A3CR (0x01E00014) /* EMIF-A CS3 config register. */
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#define DAVINCI_A3CR_VAL (0x3FFFFFFD) /* EMIF-A CS3 value for FPGA. */
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#define INTEGRITY_SYSCFG_OFFSET 0x7E8
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#define INTEGRITY_CHECKWORD_OFFSET 0x7F8
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#define INTEGRITY_CHECKWORD_VALUE 0x10ADBEEF
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DECLARE_GLOBAL_DATA_PTR;
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int board_init(void)
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{
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/* arch number of the board */
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gd->bd->bi_arch_number = MACH_TYPE_SFFSDR;
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/* address of boot parameters */
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gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
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davinci_errata_workarounds();
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/* Power on required peripherals */
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lpsc_on(DAVINCI_LPSC_GPIO);
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#if !defined(CONFIG_SYS_USE_DSPLINK)
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/* Powerup the DSP */
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dsp_on();
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#endif /* CONFIG_SYS_USE_DSPLINK */
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davinci_enable_uart0();
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davinci_enable_emac();
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davinci_enable_i2c();
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lpsc_on(DAVINCI_LPSC_TIMER1);
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timer_init();
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return(0);
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}
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/* Read ethernet MAC address from Integrity data structure inside EEPROM.
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* Returns 1 if found, 0 otherwise.
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*/
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static int sffsdr_read_mac_address(uint8_t *buf)
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{
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u_int32_t value, mac[2], address;
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/* Read Integrity data structure checkword. */
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if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, INTEGRITY_CHECKWORD_OFFSET,
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CONFIG_SYS_I2C_EEPROM_ADDR_LEN, (uint8_t *) &value, 4))
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goto err;
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if (value != INTEGRITY_CHECKWORD_VALUE)
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return 0;
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/* Read SYSCFG structure offset. */
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if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, INTEGRITY_SYSCFG_OFFSET,
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CONFIG_SYS_I2C_EEPROM_ADDR_LEN, (uint8_t *) &value, 4))
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goto err;
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address = 0x800 + (int) value; /* Address of SYSCFG structure. */
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/* Read NET CONFIG structure offset. */
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if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, address,
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CONFIG_SYS_I2C_EEPROM_ADDR_LEN, (uint8_t *) &value, 4))
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goto err;
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address = 0x800 + (int) value; /* Address of NET CONFIG structure. */
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address += 12; /* Address of NET INTERFACE CONFIG structure. */
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/* Read NET INTERFACE CONFIG 2 structure offset. */
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if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, address,
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CONFIG_SYS_I2C_EEPROM_ADDR_LEN, (uint8_t *) &value, 4))
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goto err;
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address = 0x800 + 16 + (int) value; /* Address of NET INTERFACE
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* CONFIG 2 structure. */
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/* Read MAC address. */
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if (i2c_read(CONFIG_SYS_I2C_EEPROM_ADDR, address,
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CONFIG_SYS_I2C_EEPROM_ADDR_LEN, (uint8_t *) &mac[0], 8))
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goto err;
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buf[0] = mac[0] >> 24;
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buf[1] = mac[0] >> 16;
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buf[2] = mac[0] >> 8;
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buf[3] = mac[0];
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buf[4] = mac[1] >> 24;
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buf[5] = mac[1] >> 16;
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return 1; /* Found */
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err:
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printf("Read from EEPROM @ 0x%02x failed\n", CONFIG_SYS_I2C_EEPROM_ADDR);
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return 0;
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}
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/* Platform dependent initialisation. */
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int misc_init_r(void)
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{
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uint8_t i2cbuf;
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uint8_t eeprom_enetaddr[6];
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/* EMIF-A CS3 configuration for FPGA. */
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REG(DAVINCI_A3CR) = DAVINCI_A3CR_VAL;
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/* Configure I2C switch (PCA9543) to enable channel 0. */
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i2cbuf = CONFIG_SYS_I2C_PCA9543_ENABLE_CH0;
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if (i2c_write(CONFIG_SYS_I2C_PCA9543_ADDR, 0,
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CONFIG_SYS_I2C_PCA9543_ADDR_LEN, &i2cbuf, 1)) {
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printf("Write to MUX @ 0x%02x failed\n", CONFIG_SYS_I2C_PCA9543_ADDR);
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return 1;
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}
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/* Read Ethernet MAC address from EEPROM if available. */
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if (sffsdr_read_mac_address(eeprom_enetaddr))
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davinci_sync_env_enetaddr(eeprom_enetaddr);
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return(0);
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}
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