board/bf518f-ezbrd/bf518f-ezbrd.c

   1 /*
   2  * U-boot - main board file
   3  *
   4  * Copyright (c) 2008-2009 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2 or later.
   7  */
   8
   9 #include <common.h>
  10 #include <config.h>
  11 #include <command.h>
  12 #include <net.h>
  13 #include <netdev.h>
  14 #include <spi.h>
  15 #include <asm/blackfin.h>
  16 #include <asm/portmux.h>
  17 #include <asm/mach-common/bits/otp.h>
  18 #include <asm/sdh.h>
  19
  20 DECLARE_GLOBAL_DATA_PTR;
  21
  22 int checkboard(void)
  23 {
  24         printf("Board: ADI BF518F EZ-Board board\n");
  25         printf("       Support: http://blackfin.uclinux.org/\n");
  26         return 0;
  27 }
  28
  29 #if defined(CONFIG_BFIN_MAC)
  30 static void board_init_enetaddr(uchar *mac_addr)
  31 {
  32 #ifdef CONFIG_SYS_NO_FLASH
  33 # define USE_MAC_IN_FLASH 0
  34 #else
  35 # define USE_MAC_IN_FLASH 1
  36 #endif
  37         bool valid_mac = false;
  38
  39         if (USE_MAC_IN_FLASH) {
  40                 /* we cram the MAC in the last flash sector */
  41                 uchar *board_mac_addr = (uchar *)0x203F0096;
  42                 if (is_valid_ether_addr(board_mac_addr)) {
  43                         memcpy(mac_addr, board_mac_addr, 6);
  44                         valid_mac = true;
  45                 }
  46         }
  47
  48         if (!valid_mac) {
  49                 puts("Warning: Generating 'random' MAC address\n");
  50                 eth_random_addr(mac_addr);
  51         }
  52
  53         eth_setenv_enetaddr("ethaddr", mac_addr);
  54 }
  55
  56 /* Only the first run of boards had a KSZ switch */
  57 #if defined(CONFIG_BFIN_SPI) && __SILICON_REVISION__ == 0
  58 # define KSZ_POSSIBLE 1
  59 #else
  60 # define KSZ_POSSIBLE 0
  61 #endif
  62
  63 #define KSZ_MAX_HZ    5000000
  64
  65 #define KSZ_WRITE     0x02
  66 #define KSZ_READ      0x03
  67
  68 #define KSZ_REG_CHID  0x00      /* Register 0: Chip ID0 */
  69 #define KSZ_REG_STPID 0x01      /* Register 1: Chip ID1 / Start Switch */
  70 #define KSZ_REG_GC9   0x0b      /* Register 11: Global Control 9 */
  71 #define KSZ_REG_P3C0  0x30      /* Register 48: Port 3 Control 0 */
  72
  73 static int ksz8893m_transfer(struct spi_slave *slave, uchar dir, uchar reg,
  74                              uchar data, uchar result[3])
  75 {
  76         unsigned char dout[3] = { dir, reg, data, };
  77         return spi_xfer(slave, sizeof(dout) * 8, dout, result, SPI_XFER_BEGIN | SPI_XFER_END);
  78 }
  79
  80 static int ksz8893m_reg_set(struct spi_slave *slave, uchar reg, uchar data)
  81 {
  82         unsigned char din[3];
  83         return ksz8893m_transfer(slave, KSZ_WRITE, reg, data, din);
  84 }
  85
  86 static int ksz8893m_reg_read(struct spi_slave *slave, uchar reg)
  87 {
  88         int ret;
  89         unsigned char din[3];
  90         ret = ksz8893m_transfer(slave, KSZ_READ, reg, 0, din);
  91         return ret ? ret : din[2];
  92 }
  93
  94 static int ksz8893m_reg_clear(struct spi_slave *slave, uchar reg, uchar mask)
  95 {
  96         return ksz8893m_reg_set(slave, reg, ksz8893m_reg_read(slave, reg) & mask);
  97 }
  98
  99 static int ksz8893m_reset(struct spi_slave *slave)
 100 {
 101         int ret = 0;
 102
 103         /* Disable STPID mode */
 104         ret |= ksz8893m_reg_clear(slave, KSZ_REG_GC9, 0x01);
 105
 106         /* Disable VLAN tag insert on Port3 */
 107         ret |= ksz8893m_reg_clear(slave, KSZ_REG_P3C0, 0x04);
 108
 109         /* Start switch */
 110         ret |= ksz8893m_reg_set(slave, KSZ_REG_STPID, 0x01);
 111
 112         return ret;
 113 }
 114
 115 static bool board_ksz_init(void)
 116 {
 117         static bool switch_is_alive = false;
 118
 119         if (!switch_is_alive) {
 120                 struct spi_slave *slave = spi_setup_slave(0, 1, KSZ_MAX_HZ, SPI_MODE_3);
 121                 if (slave) {
 122                         if (!spi_claim_bus(slave)) {
 123                                 bool phy_is_ksz = (ksz8893m_reg_read(slave, KSZ_REG_CHID) == 0x88);
 124                                 int ret = phy_is_ksz ? ksz8893m_reset(slave) : 0;
 125                                 switch_is_alive = (ret == 0);
 126                                 spi_release_bus(slave);
 127                         }
 128                         spi_free_slave(slave);
 129                 }
 130         }
 131
 132         return switch_is_alive;
 133 }
 134
 135 int board_eth_init(bd_t *bis)
 136 {
 137         if (KSZ_POSSIBLE) {
 138                 if (!board_ksz_init())
 139                         return 0;
 140         }
 141         return bfin_EMAC_initialize(bis);
 142 }
 143 #endif
 144
 145 int misc_init_r(void)
 146 {
 147 #ifdef CONFIG_BFIN_MAC
 148         uchar enetaddr[6];
 149         if (!eth_getenv_enetaddr("ethaddr", enetaddr))
 150                 board_init_enetaddr(enetaddr);
 151 #endif
 152
 153 #ifndef CONFIG_SYS_NO_FLASH
 154         /* we use the last sector for the MAC address / POST LDR */
 155         extern flash_info_t flash_info[];
 156         flash_protect(FLAG_PROTECT_SET, 0x203F0000, 0x203FFFFF, &flash_info[0]);
 157 #endif
 158
 159         return 0;
 160 }
 161
 162 int board_early_init_f(void)
 163 {
 164         /* connect async banks by default */
 165         const unsigned short pins[] = {
 166                 P_AMS2, P_AMS3, 0,
 167         };
 168         return peripheral_request_list(pins, "async");
 169 }
 170
 171 #ifdef CONFIG_BFIN_SDH
 172 int board_mmc_init(bd_t *bis)
 173 {
 174         return bfin_mmc_init(bis);
 175 }
 176 #endif