bf518f-ezbrd.c
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/*
* U-boot - main board file
*
* Copyright (c) 2008-2009 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
#include <common.h>
#include <config.h>
#include <command.h>
#include <net.h>
#include <netdev.h>
#include <spi.h>
#include <asm/blackfin.h>
#include <asm/portmux.h>
#include <asm/mach-common/bits/otp.h>
#include <asm/sdh.h>
DECLARE_GLOBAL_DATA_PTR;
int checkboard(void)
{
printf("Board: ADI BF518F EZ-Board board\n");
printf(" Support: http://blackfin.uclinux.org/\n");
return 0;
}
#if defined(CONFIG_BFIN_MAC)
static void board_init_enetaddr(uchar *mac_addr)
{
#ifdef CONFIG_SYS_NO_FLASH
# define USE_MAC_IN_FLASH 0
#else
# define USE_MAC_IN_FLASH 1
#endif
bool valid_mac = false;
if (USE_MAC_IN_FLASH) {
/* we cram the MAC in the last flash sector */
uchar *board_mac_addr = (uchar *)0x203F0096;
if (is_valid_ether_addr(board_mac_addr)) {
memcpy(mac_addr, board_mac_addr, 6);
valid_mac = true;
}
}
if (!valid_mac) {
puts("Warning: Generating 'random' MAC address\n");
eth_random_addr(mac_addr);
}
eth_setenv_enetaddr("ethaddr", mac_addr);
}
/* Only the first run of boards had a KSZ switch */
#if defined(CONFIG_BFIN_SPI) && __SILICON_REVISION__ == 0
# define KSZ_POSSIBLE 1
#else
# define KSZ_POSSIBLE 0
#endif
#define KSZ_MAX_HZ 5000000
#define KSZ_WRITE 0x02
#define KSZ_READ 0x03
#define KSZ_REG_CHID 0x00 /* Register 0: Chip ID0 */
#define KSZ_REG_STPID 0x01 /* Register 1: Chip ID1 / Start Switch */
#define KSZ_REG_GC9 0x0b /* Register 11: Global Control 9 */
#define KSZ_REG_P3C0 0x30 /* Register 48: Port 3 Control 0 */
static int ksz8893m_transfer(struct spi_slave *slave, uchar dir, uchar reg,
uchar data, uchar result[3])
{
unsigned char dout[3] = { dir, reg, data, };
return spi_xfer(slave, sizeof(dout) * 8, dout, result, SPI_XFER_BEGIN | SPI_XFER_END);
}
static int ksz8893m_reg_set(struct spi_slave *slave, uchar reg, uchar data)
{
unsigned char din[3];
return ksz8893m_transfer(slave, KSZ_WRITE, reg, data, din);
}
static int ksz8893m_reg_read(struct spi_slave *slave, uchar reg)
{
int ret;
unsigned char din[3];
ret = ksz8893m_transfer(slave, KSZ_READ, reg, 0, din);
return ret ? ret : din[2];
}
static int ksz8893m_reg_clear(struct spi_slave *slave, uchar reg, uchar mask)
{
return ksz8893m_reg_set(slave, reg, ksz8893m_reg_read(slave, reg) & mask);
}
static int ksz8893m_reset(struct spi_slave *slave)
{
int ret = 0;
/* Disable STPID mode */
ret |= ksz8893m_reg_clear(slave, KSZ_REG_GC9, 0x01);
/* Disable VLAN tag insert on Port3 */
ret |= ksz8893m_reg_clear(slave, KSZ_REG_P3C0, 0x04);
/* Start switch */
ret |= ksz8893m_reg_set(slave, KSZ_REG_STPID, 0x01);
return ret;
}
static bool board_ksz_init(void)
{
static bool switch_is_alive = false;
if (!switch_is_alive) {
struct spi_slave *slave = spi_setup_slave(0, 1, KSZ_MAX_HZ, SPI_MODE_3);
if (slave) {
if (!spi_claim_bus(slave)) {
bool phy_is_ksz = (ksz8893m_reg_read(slave, KSZ_REG_CHID) == 0x88);
int ret = phy_is_ksz ? ksz8893m_reset(slave) : 0;
switch_is_alive = (ret == 0);
spi_release_bus(slave);
}
spi_free_slave(slave);
}
}
return switch_is_alive;
}
int board_eth_init(bd_t *bis)
{
if (KSZ_POSSIBLE) {
if (!board_ksz_init())
return 0;
}
return bfin_EMAC_initialize(bis);
}
#endif
int misc_init_r(void)
{
#ifdef CONFIG_BFIN_MAC
uchar enetaddr[6];
if (!eth_getenv_enetaddr("ethaddr", enetaddr))
board_init_enetaddr(enetaddr);
#endif
#ifndef CONFIG_SYS_NO_FLASH
/* we use the last sector for the MAC address / POST LDR */
extern flash_info_t flash_info[];
flash_protect(FLAG_PROTECT_SET, 0x203F0000, 0x203FFFFF, &flash_info[0]);
#endif
return 0;
}
int board_early_init_f(void)
{
/* connect async banks by default */
const unsigned short pins[] = {
P_AMS2, P_AMS3, 0,
};
return peripheral_request_list(pins, "async");
}
#ifdef CONFIG_BFIN_SDH
int board_mmc_init(bd_t *bis)
{
return bfin_mmc_init(bis);
}
#endif