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