1 | /************************************************************************** |
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2 | ETHERBOOT - BOOTP/TFTP Bootstrap Program |
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3 | |
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4 | Author: Martin Renters. |
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5 | Date: Mar 22 1995 |
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6 | |
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7 | This code is based heavily on David Greenman's if_ed.c driver and |
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8 | Andres Vega Garcia's if_ep.c driver. |
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9 | |
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10 | Copyright (C) 1993-1994, David Greenman, Martin Renters. |
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11 | Copyright (C) 1993-1995, Andres Vega Garcia. |
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12 | Copyright (C) 1995, Serge Babkin. |
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13 | This software may be used, modified, copied, distributed, and sold, in |
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14 | both source and binary form provided that the above copyright and these |
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15 | terms are retained. Under no circumstances are the authors responsible for |
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16 | the proper functioning of this software, nor do the authors assume any |
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17 | responsibility for damages incurred with its use. |
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18 | |
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19 | 3c509 support added by Serge Babkin (babkin@hq.icb.chel.su) |
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20 | |
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21 | $Id$ |
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22 | |
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23 | ***************************************************************************/ |
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24 | |
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25 | FILE_LICENCE ( BSD2 ); |
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26 | |
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27 | /* #define EDEBUG */ |
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28 | |
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29 | #include <gpxe/ethernet.h> |
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30 | #include "etherboot.h" |
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31 | #include "nic.h" |
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32 | #include <gpxe/isa.h> |
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33 | #include "3c509.h" |
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34 | |
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35 | static enum { none, bnc, utp } connector = none; /* for 3C509 */ |
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36 | |
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37 | /************************************************************************** |
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38 | ETH_RESET - Reset adapter |
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39 | ***************************************************************************/ |
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40 | void t5x9_disable ( struct nic *nic ) { |
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41 | /* stop card */ |
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42 | outw(RX_DISABLE, nic->ioaddr + EP_COMMAND); |
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43 | outw(RX_DISCARD_TOP_PACK, nic->ioaddr + EP_COMMAND); |
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44 | while (inw(nic->ioaddr + EP_STATUS) & S_COMMAND_IN_PROGRESS) |
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45 | ; |
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46 | outw(TX_DISABLE, nic->ioaddr + EP_COMMAND); |
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47 | outw(STOP_TRANSCEIVER, nic->ioaddr + EP_COMMAND); |
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48 | udelay(1000); |
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49 | outw(RX_RESET, nic->ioaddr + EP_COMMAND); |
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50 | outw(TX_RESET, nic->ioaddr + EP_COMMAND); |
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51 | outw(C_INTR_LATCH, nic->ioaddr + EP_COMMAND); |
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52 | outw(SET_RD_0_MASK, nic->ioaddr + EP_COMMAND); |
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53 | outw(SET_INTR_MASK, nic->ioaddr + EP_COMMAND); |
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54 | outw(SET_RX_FILTER, nic->ioaddr + EP_COMMAND); |
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55 | |
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56 | /* |
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57 | * wait for reset to complete |
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58 | */ |
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59 | while (inw(nic->ioaddr + EP_STATUS) & S_COMMAND_IN_PROGRESS) |
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60 | ; |
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61 | |
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62 | GO_WINDOW(nic->ioaddr,0); |
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63 | |
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64 | /* Disable the card */ |
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65 | outw(0, nic->ioaddr + EP_W0_CONFIG_CTRL); |
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66 | |
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67 | /* Configure IRQ to none */ |
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68 | outw(SET_IRQ(0), nic->ioaddr + EP_W0_RESOURCE_CFG); |
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69 | } |
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70 | |
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71 | static void t509_enable ( struct nic *nic ) { |
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72 | int i; |
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73 | |
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74 | /* Enable the card */ |
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75 | GO_WINDOW(nic->ioaddr,0); |
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76 | outw(ENABLE_DRQ_IRQ, nic->ioaddr + EP_W0_CONFIG_CTRL); |
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77 | |
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78 | GO_WINDOW(nic->ioaddr,2); |
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79 | |
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80 | /* Reload the ether_addr. */ |
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81 | for (i = 0; i < ETH_ALEN; i++) |
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82 | outb(nic->node_addr[i], nic->ioaddr + EP_W2_ADDR_0 + i); |
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83 | |
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84 | outw(RX_RESET, nic->ioaddr + EP_COMMAND); |
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85 | outw(TX_RESET, nic->ioaddr + EP_COMMAND); |
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86 | |
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87 | /* Window 1 is operating window */ |
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88 | GO_WINDOW(nic->ioaddr,1); |
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89 | for (i = 0; i < 31; i++) |
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90 | inb(nic->ioaddr + EP_W1_TX_STATUS); |
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91 | |
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92 | /* get rid of stray intr's */ |
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93 | outw(ACK_INTR | 0xff, nic->ioaddr + EP_COMMAND); |
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94 | |
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95 | outw(SET_RD_0_MASK | S_5_INTS, nic->ioaddr + EP_COMMAND); |
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96 | |
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97 | outw(SET_INTR_MASK, nic->ioaddr + EP_COMMAND); |
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98 | |
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99 | outw(SET_RX_FILTER | FIL_GROUP | FIL_INDIVIDUAL | FIL_BRDCST, |
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100 | nic->ioaddr + EP_COMMAND); |
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101 | |
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102 | /* configure BNC */ |
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103 | if (connector == bnc) { |
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104 | outw(START_TRANSCEIVER, nic->ioaddr + EP_COMMAND); |
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105 | udelay(1000); |
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106 | } |
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107 | /* configure UTP */ |
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108 | else if (connector == utp) { |
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109 | GO_WINDOW(nic->ioaddr,4); |
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110 | outw(ENABLE_UTP, nic->ioaddr + EP_W4_MEDIA_TYPE); |
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111 | sleep(2); /* Give time for media to negotiate */ |
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112 | GO_WINDOW(nic->ioaddr,1); |
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113 | } |
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114 | |
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115 | /* start transceiver and receiver */ |
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116 | outw(RX_ENABLE, nic->ioaddr + EP_COMMAND); |
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117 | outw(TX_ENABLE, nic->ioaddr + EP_COMMAND); |
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118 | |
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119 | /* set early threshold for minimal packet length */ |
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120 | outw(SET_RX_EARLY_THRESH | ETH_ZLEN, nic->ioaddr + EP_COMMAND); |
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121 | outw(SET_TX_START_THRESH | 16, nic->ioaddr + EP_COMMAND); |
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122 | } |
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123 | |
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124 | static void t509_reset ( struct nic *nic ) { |
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125 | t5x9_disable ( nic ); |
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126 | t509_enable ( nic ); |
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127 | } |
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128 | |
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129 | /************************************************************************** |
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130 | ETH_TRANSMIT - Transmit a frame |
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131 | ***************************************************************************/ |
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132 | static char padmap[] = { |
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133 | 0, 3, 2, 1}; |
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134 | |
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135 | static void t509_transmit( |
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136 | struct nic *nic, |
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137 | const char *d, /* Destination */ |
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138 | unsigned int t, /* Type */ |
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139 | unsigned int s, /* size */ |
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140 | const char *p) /* Packet */ |
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141 | { |
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142 | register unsigned int len; |
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143 | int pad; |
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144 | int status; |
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145 | |
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146 | #ifdef EDEBUG |
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147 | printf("{l=%d,t=%hX}",s+ETH_HLEN,t); |
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148 | #endif |
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149 | |
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150 | /* swap bytes of type */ |
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151 | t= htons(t); |
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152 | |
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153 | len=s+ETH_HLEN; /* actual length of packet */ |
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154 | pad = padmap[len & 3]; |
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155 | |
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156 | /* |
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157 | * The 3c509 automatically pads short packets to minimum ethernet length, |
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158 | * but we drop packets that are too large. Perhaps we should truncate |
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159 | * them instead? |
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160 | */ |
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161 | if (len + pad > ETH_FRAME_LEN) { |
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162 | return; |
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163 | } |
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164 | |
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165 | /* drop acknowledgements */ |
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166 | while ((status=inb(nic->ioaddr + EP_W1_TX_STATUS)) & TXS_COMPLETE ) { |
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167 | if (status & (TXS_UNDERRUN|TXS_MAX_COLLISION|TXS_STATUS_OVERFLOW)) { |
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168 | outw(TX_RESET, nic->ioaddr + EP_COMMAND); |
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169 | outw(TX_ENABLE, nic->ioaddr + EP_COMMAND); |
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170 | } |
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171 | outb(0x0, nic->ioaddr + EP_W1_TX_STATUS); |
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172 | } |
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173 | |
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174 | while (inw(nic->ioaddr + EP_W1_FREE_TX) < (unsigned short)len + pad + 4) |
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175 | ; /* no room in FIFO */ |
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176 | |
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177 | outw(len, nic->ioaddr + EP_W1_TX_PIO_WR_1); |
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178 | outw(0x0, nic->ioaddr + EP_W1_TX_PIO_WR_1); /* Second dword meaningless */ |
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179 | |
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180 | /* write packet */ |
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181 | outsw(nic->ioaddr + EP_W1_TX_PIO_WR_1, d, ETH_ALEN/2); |
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182 | outsw(nic->ioaddr + EP_W1_TX_PIO_WR_1, nic->node_addr, ETH_ALEN/2); |
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183 | outw(t, nic->ioaddr + EP_W1_TX_PIO_WR_1); |
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184 | outsw(nic->ioaddr + EP_W1_TX_PIO_WR_1, p, s / 2); |
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185 | if (s & 1) |
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186 | outb(*(p+s - 1), nic->ioaddr + EP_W1_TX_PIO_WR_1); |
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187 | |
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188 | while (pad--) |
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189 | outb(0, nic->ioaddr + EP_W1_TX_PIO_WR_1); /* Padding */ |
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190 | |
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191 | /* wait for Tx complete */ |
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192 | while((inw(nic->ioaddr + EP_STATUS) & S_COMMAND_IN_PROGRESS) != 0) |
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193 | ; |
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194 | } |
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195 | |
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196 | /************************************************************************** |
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197 | ETH_POLL - Wait for a frame |
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198 | ***************************************************************************/ |
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199 | static int t509_poll(struct nic *nic, int retrieve) |
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200 | { |
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201 | /* common variables */ |
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202 | /* variables for 3C509 */ |
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203 | short status, cst; |
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204 | register short rx_fifo; |
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205 | |
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206 | cst=inw(nic->ioaddr + EP_STATUS); |
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207 | |
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208 | #ifdef EDEBUG |
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209 | if(cst & 0x1FFF) |
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210 | printf("-%hX-",cst); |
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211 | #endif |
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212 | |
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213 | if( (cst & S_RX_COMPLETE)==0 ) { |
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214 | /* acknowledge everything */ |
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215 | outw(ACK_INTR| (cst & S_5_INTS), nic->ioaddr + EP_COMMAND); |
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216 | outw(C_INTR_LATCH, nic->ioaddr + EP_COMMAND); |
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217 | |
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218 | return 0; |
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219 | } |
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220 | |
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221 | status = inw(nic->ioaddr + EP_W1_RX_STATUS); |
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222 | #ifdef EDEBUG |
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223 | printf("*%hX*",status); |
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224 | #endif |
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225 | |
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226 | if (status & ERR_RX) { |
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227 | outw(RX_DISCARD_TOP_PACK, nic->ioaddr + EP_COMMAND); |
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228 | return 0; |
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229 | } |
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230 | |
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231 | rx_fifo = status & RX_BYTES_MASK; |
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232 | if (rx_fifo==0) |
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233 | return 0; |
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234 | |
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235 | if ( ! retrieve ) return 1; |
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236 | |
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237 | /* read packet */ |
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238 | #ifdef EDEBUG |
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239 | printf("[l=%d",rx_fifo); |
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240 | #endif |
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241 | insw(nic->ioaddr + EP_W1_RX_PIO_RD_1, nic->packet, rx_fifo / 2); |
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242 | if(rx_fifo & 1) |
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243 | nic->packet[rx_fifo-1]=inb(nic->ioaddr + EP_W1_RX_PIO_RD_1); |
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244 | nic->packetlen=rx_fifo; |
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245 | |
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246 | while(1) { |
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247 | status = inw(nic->ioaddr + EP_W1_RX_STATUS); |
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248 | #ifdef EDEBUG |
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249 | printf("*%hX*",status); |
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250 | #endif |
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251 | rx_fifo = status & RX_BYTES_MASK; |
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252 | if(rx_fifo>0) { |
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253 | insw(nic->ioaddr + EP_W1_RX_PIO_RD_1, nic->packet+nic->packetlen, rx_fifo / 2); |
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254 | if(rx_fifo & 1) |
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255 | nic->packet[nic->packetlen+rx_fifo-1]=inb(nic->ioaddr + EP_W1_RX_PIO_RD_1); |
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256 | nic->packetlen+=rx_fifo; |
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257 | #ifdef EDEBUG |
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258 | printf("+%d",rx_fifo); |
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259 | #endif |
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260 | } |
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261 | if(( status & RX_INCOMPLETE )==0) { |
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262 | #ifdef EDEBUG |
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263 | printf("=%d",nic->packetlen); |
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264 | #endif |
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265 | break; |
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266 | } |
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267 | udelay(1000); /* if incomplete wait 1 ms */ |
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268 | } |
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269 | /* acknowledge reception of packet */ |
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270 | outw(RX_DISCARD_TOP_PACK, nic->ioaddr + EP_COMMAND); |
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271 | while (inw(nic->ioaddr + EP_STATUS) & S_COMMAND_IN_PROGRESS) |
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272 | ; |
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273 | #ifdef EDEBUG |
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274 | { |
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275 | unsigned short type = 0; /* used by EDEBUG */ |
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276 | type = (nic->packet[12]<<8) | nic->packet[13]; |
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277 | if(nic->packet[0]+nic->packet[1]+nic->packet[2]+nic->packet[3]+nic->packet[4]+ |
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278 | nic->packet[5] == 0xFF*ETH_ALEN) |
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279 | printf(",t=%hX,b]",type); |
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280 | else |
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281 | printf(",t=%hX]",type); |
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282 | } |
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283 | #endif |
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284 | return (1); |
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285 | } |
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286 | |
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287 | /************************************************************************** |
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288 | ETH_IRQ - interrupt handling |
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289 | ***************************************************************************/ |
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290 | static void t509_irq(struct nic *nic __unused, irq_action_t action __unused) |
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291 | { |
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292 | switch ( action ) { |
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293 | case DISABLE : |
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294 | break; |
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295 | case ENABLE : |
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296 | break; |
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297 | case FORCE : |
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298 | break; |
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299 | } |
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300 | } |
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301 | |
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302 | /************************************************************************* |
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303 | 3Com 509 - specific routines |
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304 | **************************************************************************/ |
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305 | |
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306 | static int eeprom_rdy ( uint16_t ioaddr ) { |
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307 | int i; |
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308 | |
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309 | for (i = 0; is_eeprom_busy(ioaddr) && i < MAX_EEPROMBUSY; i++); |
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310 | if (i >= MAX_EEPROMBUSY) { |
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311 | /* printf("3c509: eeprom failed to come ready.\n"); */ |
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312 | /* memory in EPROM is tight */ |
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313 | /* printf("3c509: eeprom busy.\n"); */ |
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314 | return (0); |
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315 | } |
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316 | return (1); |
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317 | } |
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318 | |
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319 | /* |
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320 | * get_e: gets a 16 bits word from the EEPROM. |
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321 | */ |
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322 | static int get_e ( uint16_t ioaddr, int offset ) { |
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323 | GO_WINDOW(ioaddr,0); |
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324 | if (!eeprom_rdy(ioaddr)) |
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325 | return (0xffff); |
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326 | outw(EEPROM_CMD_RD | offset, ioaddr + EP_W0_EEPROM_COMMAND); |
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327 | if (!eeprom_rdy(ioaddr)) |
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328 | return (0xffff); |
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329 | return (inw(ioaddr + EP_W0_EEPROM_DATA)); |
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330 | } |
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331 | |
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332 | static struct nic_operations t509_operations = { |
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333 | .connect = dummy_connect, |
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334 | .poll = t509_poll, |
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335 | .transmit = t509_transmit, |
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336 | .irq = t509_irq, |
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337 | }; |
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338 | |
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339 | /************************************************************************** |
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340 | ETH_PROBE - Look for an adapter |
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341 | ***************************************************************************/ |
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342 | int t5x9_probe ( struct nic *nic, |
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343 | uint16_t prod_id_check, uint16_t prod_id_mask ) { |
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344 | uint16_t prod_id; |
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345 | int i,j; |
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346 | unsigned short *p; |
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347 | |
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348 | /* Check product ID */ |
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349 | prod_id = get_e ( nic->ioaddr, EEPROM_PROD_ID ); |
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350 | if ( ( prod_id & prod_id_mask ) != prod_id_check ) { |
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351 | printf ( "EEPROM Product ID is incorrect (%hx & %hx != %hx)\n", |
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352 | prod_id, prod_id_mask, prod_id_check ); |
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353 | return 0; |
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354 | } |
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355 | |
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356 | /* test for presence of connectors */ |
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357 | GO_WINDOW(nic->ioaddr,0); |
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358 | i = inw(nic->ioaddr + EP_W0_CONFIG_CTRL); |
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359 | j = (inw(nic->ioaddr + EP_W0_ADDRESS_CFG) >> 14) & 0x3; |
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360 | |
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361 | switch(j) { |
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362 | case 0: |
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363 | if (i & IS_UTP) { |
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364 | printf("10baseT\n"); |
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365 | connector = utp; |
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366 | } else { |
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367 | printf("10baseT not present\n"); |
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368 | return 0; |
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369 | } |
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370 | break; |
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371 | case 1: |
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372 | if (i & IS_AUI) { |
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373 | printf("10base5\n"); |
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374 | } else { |
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375 | printf("10base5 not present\n"); |
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376 | return 0; |
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377 | } |
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378 | break; |
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379 | case 3: |
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380 | if (i & IS_BNC) { |
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381 | printf("10base2\n"); |
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382 | connector = bnc; |
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383 | } else { |
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384 | printf("10base2 not present\n"); |
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385 | return 0; |
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386 | } |
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387 | break; |
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388 | default: |
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389 | printf("unknown connector\n"); |
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390 | return 0; |
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391 | } |
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392 | |
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393 | /* |
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394 | * Read the station address from the eeprom |
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395 | */ |
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396 | p = (unsigned short *) nic->node_addr; |
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397 | for (i = 0; i < ETH_ALEN / 2; i++) { |
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398 | p[i] = htons(get_e(nic->ioaddr,i)); |
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399 | GO_WINDOW(nic->ioaddr,2); |
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400 | outw(ntohs(p[i]), nic->ioaddr + EP_W2_ADDR_0 + (i * 2)); |
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401 | } |
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402 | |
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403 | DBG ( "Ethernet Address: %s\n", eth_ntoa ( nic->node_addr ) ); |
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404 | |
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405 | t509_reset(nic); |
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406 | |
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407 | nic->nic_op = &t509_operations; |
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408 | return 1; |
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409 | |
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410 | } |
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411 | |
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412 | /* |
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413 | * Local variables: |
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414 | * c-basic-offset: 8 |
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415 | * End: |
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416 | */ |
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