1 | /* |
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2 | * RTEMS/KA9Q driver for WD8003 Ethernet Controller |
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3 | * |
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4 | * |
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5 | * $Id$ |
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6 | */ |
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7 | #include <bsp.h> |
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8 | #include <wd80x3.h> |
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9 | #include <rtems/error.h> |
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10 | #include <ka9q/rtems_ka9q.h> |
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11 | #include <ka9q/global.h> |
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12 | #include <ka9q/enet.h> |
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13 | #include <ka9q/iface.h> |
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14 | #include <ka9q/netuser.h> |
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15 | #include <ka9q/trace.h> |
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16 | #include <ka9q/commands.h> |
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17 | #include <ka9q/domain.h> |
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18 | #include <irq.h> |
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19 | |
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20 | #define ET_MINLEN 60 /* minimum message length */ |
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21 | |
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22 | /* |
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23 | * Number of SCCs supported by this driver |
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24 | */ |
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25 | #define NSCCDRIVER 1 |
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26 | |
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27 | /* |
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28 | * Default number of buffer descriptors set aside for this driver. |
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29 | * The number of transmit buffer descriptors has to be quite large |
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30 | * since a single frame often uses four or more buffer descriptors. |
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31 | */ |
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32 | |
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33 | #define RX_BUF_COUNT 15 |
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34 | #define TX_BUF_COUNT 4 |
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35 | #define TX_BD_PER_BUF 4 |
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36 | |
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37 | /* |
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38 | * RTEMS event used by interrupt handler to signal daemons. |
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39 | * This must *not* be the same event used by the KA9Q task synchronization. |
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40 | */ |
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41 | #define INTERRUPT_EVENT RTEMS_EVENT_1 |
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42 | |
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43 | /* |
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44 | * Receive buffer size -- Allow for a full ethernet packet plus a pointer |
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45 | */ |
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46 | #define RBUF_SIZE (1520 + sizeof (struct iface *)) |
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47 | |
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48 | /* |
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49 | * Hardware-specific storage |
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50 | */ |
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51 | typedef struct { |
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52 | rtems_irq_connect_data irqInfo; |
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53 | struct mbuf **rxMbuf; |
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54 | struct mbuf **txMbuf; |
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55 | unsigned int port; |
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56 | unsigned char *base; |
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57 | unsigned long bpar; |
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58 | int rxBdCount; |
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59 | int txBdCount; |
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60 | int txBdHead; |
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61 | int txBdTail; |
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62 | int txBdActiveCount; |
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63 | struct iface *iface; |
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64 | rtems_id txWaitTid; |
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65 | |
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66 | /* |
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67 | * Statistics |
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68 | */ |
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69 | unsigned long rxInterrupts; |
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70 | unsigned long rxNotFirst; |
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71 | unsigned long rxNotLast; |
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72 | unsigned long rxGiant; |
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73 | unsigned long rxNonOctet; |
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74 | unsigned long rxRunt; |
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75 | unsigned long rxBadCRC; |
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76 | unsigned long rxOverrun; |
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77 | unsigned long rxCollision; |
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78 | |
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79 | unsigned long txInterrupts; |
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80 | unsigned long txDeferred; |
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81 | unsigned long txHeartbeat; |
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82 | unsigned long txLateCollision; |
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83 | unsigned long txRetryLimit; |
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84 | unsigned long txUnderrun; |
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85 | unsigned long txLostCarrier; |
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86 | unsigned long txRawWait; |
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87 | }wd80x3EnetDriver; |
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88 | |
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89 | #define RO 0x10 |
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90 | |
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91 | #define SHATOT (8*1024) /* size of shared memory */ |
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92 | #define SHAPAGE 256 /* shared memory information */ |
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93 | #define MAXSIZ 1536 /*(MAXBUF - MESSH_SZ)*/ |
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94 | #define OUTPAGE ((SHATOT-(MAXSIZ+SHAPAGE-1))/SHAPAGE) |
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95 | |
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96 | static unsigned long loopc; |
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97 | |
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98 | static wd80x3EnetDriver wd8003EnetDriver[NSCCDRIVER]; |
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99 | |
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100 | /* |
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101 | * WD8003 interrupt handler. The code as it is cleraly showes that |
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102 | * only one driver is connected. In order to change this a table |
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103 | * making the correspondance between the current irq number and |
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104 | * the corresponding wd8003EnetDriver structure could be used... |
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105 | */ |
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106 | static void wd8003Enet_interrupt_handler () |
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107 | { |
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108 | unsigned int tport, nowTicks, bootTicks; |
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109 | unsigned char status, status2; |
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110 | |
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111 | struct iface *iface = (struct iface *)(wd8003EnetDriver[0].iface); |
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112 | wd80x3EnetDriver *dp = (wd80x3EnetDriver *)&wd8003EnetDriver[0]; |
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113 | struct mbuf *bp; |
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114 | unsigned int i2; |
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115 | unsigned int len; |
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116 | unsigned char start, next, current; |
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117 | char *shp, *temp; |
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118 | |
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119 | tport = wd8003EnetDriver[0].port ; |
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120 | |
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121 | /* |
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122 | * Drop chips interrupt |
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123 | */ |
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124 | outport_byte(tport+IMR, 0x00); |
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125 | |
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126 | /* |
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127 | * Read status |
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128 | */ |
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129 | inport_byte(tport+ISR, status); |
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130 | |
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131 | /* |
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132 | * Ring overwrite |
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133 | */ |
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134 | |
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135 | if (status & MSK_OVW){ |
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136 | outport_byte(tport+CMDR, MSK_STP + MSK_RD2); /* stop 8390 */ |
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137 | rtems_clock_get(RTEMS_CLOCK_GET_TICKS_SINCE_BOOT, &bootTicks ); |
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138 | while(nowTicks < bootTicks+loopc) /* 2ms delay */ |
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139 | rtems_clock_get(RTEMS_CLOCK_GET_TICKS_SINCE_BOOT, &nowTicks ); |
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140 | outport_byte(tport+RBCR0, 0); /* clear byte count */ |
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141 | outport_byte(tport+RBCR1, 0); |
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142 | inport_byte(tport+ISR, status2); |
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143 | status |= (status2 & (MSK_PTX+MSK_TXE)) ; /* TX status */ |
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144 | outport_byte(tport+TCR, MSK_LOOP); /* loopback mode */ |
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145 | outport_byte(tport+CMDR, MSK_STA + MSK_RD2); /* start */ |
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146 | } |
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147 | |
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148 | /* |
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149 | * Frame received? |
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150 | */ |
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151 | while (status & (MSK_PRX+MSK_RXE)) { |
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152 | outport_byte(tport+ISR, status & (MSK_PRX+MSK_RXE)); |
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153 | inport_byte(tport+BNRY, start); |
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154 | start += 1; |
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155 | shp = dp->base + 1 + (SHAPAGE * start); |
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156 | next = *shp++; |
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157 | len = *((short *)shp)++ - 4; |
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158 | if (start >= OUTPAGE || next >= OUTPAGE) |
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159 | break; |
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160 | bp = ambufw (RBUF_SIZE); |
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161 | bp->data += sizeof (struct iface *); |
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162 | temp = bp->data; |
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163 | bp->cnt = len; |
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164 | |
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165 | if ((i2 = (OUTPAGE - start) * SHAPAGE - 4) < len){ |
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166 | memcpy(temp, shp, i2); |
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167 | len -= i2; |
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168 | temp += i2; |
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169 | shp = dp->base; |
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170 | } |
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171 | memcpy(temp, shp, len); |
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172 | |
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173 | net_route (iface, &bp); |
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174 | outport_byte(tport+BNRY, next-1); |
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175 | outport_byte(tport+CMDR, MSK_PG1 + MSK_RD2); |
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176 | inport_byte(tport+CURR, current); |
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177 | outport_byte(tport+CMDR, MSK_PG0 + MSK_RD2); |
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178 | if (current == next) |
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179 | break; |
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180 | } |
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181 | |
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182 | /* |
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183 | * Ring overwrite |
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184 | */ |
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185 | if (status & MSK_OVW) { |
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186 | outport_byte(tport+ISR, MSK_OVW); /* reset IR */ |
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187 | outport_byte(tport+TCR, 0); /* out of loopback */ |
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188 | if ((status & (MSK_PTX+MSK_TXE)) == 0) |
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189 | outport_byte(tport+CMDR, MSK_TXP + MSK_RD2); /* resend */ |
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190 | } |
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191 | |
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192 | /* |
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193 | * Enable chip interrupts |
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194 | */ |
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195 | outport_byte(tport+IMR, 0x15); |
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196 | } |
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197 | |
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198 | static void nopOn(const rtems_irq_connect_data* notUsed) |
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199 | { |
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200 | /* |
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201 | * code should be moved from wd8003Enet_initialize_hardware |
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202 | * to this location |
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203 | */ |
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204 | } |
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205 | |
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206 | static int wdIsOn(const rtems_irq_connect_data* irq) |
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207 | { |
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208 | return pc386_irq_enabled_at_i8259s (irq->name); |
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209 | } |
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210 | |
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211 | /* |
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212 | * Initialize the ethernet hardware |
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213 | */ |
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214 | static void |
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215 | wd8003Enet_initialize_hardware (wd80x3EnetDriver *dp, int broadcastFlag) |
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216 | { |
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217 | int i1, ultra; |
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218 | char cc1, cc2; |
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219 | unsigned char temp; |
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220 | rtems_status_code sc; |
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221 | unsigned int tport; |
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222 | |
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223 | tport = dp->port; |
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224 | |
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225 | /* address from board ROM */ |
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226 | inport_byte(tport+0x04, temp); |
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227 | outport_byte(tport+0x04, temp & 0x7f); |
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228 | |
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229 | for (i1=cc2=0; i1<8; i1++) { |
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230 | inport_byte(tport + ADDROM + i1, cc1); |
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231 | cc2 += cc1; |
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232 | if (i1 < 6) |
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233 | dp->iface->hwaddr[i1] = cc1; |
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234 | } |
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235 | |
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236 | inport_byte(tport+0x04, temp); |
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237 | outport_byte(tport+0x04, temp | 0x80); /* alternate registers */ |
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238 | outport_byte(tport+W83CREG, MSK_RESET); /* reset board, set buffer */ |
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239 | outport_byte(tport+W83CREG, 0); |
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240 | outport_byte(tport+W83CREG, MSK_ENASH + (int)((dp->bpar>>13)&0x3f)); |
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241 | |
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242 | outport_byte(tport+CMDR, MSK_PG0 + MSK_RD2); |
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243 | cc1 = MSK_BMS + MSK_FT10; /* configure 8 or 16 bits */ |
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244 | |
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245 | inport_byte(tport+0x07, temp) ; |
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246 | |
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247 | ultra = ((temp & 0xf0) == 0x20 || (temp & 0xf0) == 0x40); |
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248 | if (ultra) |
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249 | cc1 = MSK_WTS + MSK_BMS + MSK_FT10; |
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250 | outport_byte(tport+DCR, cc1); |
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251 | outport_byte(tport+RBCR0, 0); |
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252 | outport_byte(tport+RBCR1, 0); |
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253 | outport_byte(tport+RCR, MSK_MON); /* disable the rxer */ |
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254 | outport_byte(tport+TCR, 0); /* normal operation */ |
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255 | outport_byte(tport+PSTOP, OUTPAGE); /* init PSTOP */ |
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256 | outport_byte(tport+PSTART, 0); /* init PSTART */ |
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257 | outport_byte(tport+BNRY, -1); /* init BNRY */ |
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258 | outport_byte(tport+ISR, -1); /* clear IR's */ |
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259 | outport_byte(tport+IMR, 0x15); /* 0x17 enable interrupt */ |
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260 | |
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261 | outport_byte(tport+CMDR, MSK_PG1 + MSK_RD2); |
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262 | |
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263 | for (i1=0; i1<6; i1++) /* initial physical addr */ |
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264 | outport_byte(tport+PAR+i1, dp->iface->hwaddr[i1]); |
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265 | |
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266 | for (i1=0; i1<MARsize; i1++) /* clear multicast */ |
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267 | outport_byte(tport+MAR+i1, 0); |
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268 | outport_byte(tport+CURR, 0); /* init current packet */ |
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269 | |
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270 | outport_byte(tport+CMDR, MSK_PG0 + MSK_RD2); |
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271 | outport_byte(tport+CMDR, MSK_STA + MSK_RD2); /* put 8390 on line */ |
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272 | outport_byte(tport+RCR, MSK_AB); /* MSK_AB accept broadcast */ |
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273 | |
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274 | if (ultra) { |
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275 | inport_byte(tport+0x0c, temp); |
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276 | outport_byte(tport+0x0c, temp | 0x80); |
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277 | outport_byte(tport+0x05, 0x80); |
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278 | outport_byte(tport+0x06, 0x01); |
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279 | } |
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280 | |
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281 | /* |
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282 | * Set up interrupts |
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283 | */ |
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284 | dp->irqInfo.hdl = wd8003Enet_interrupt_handler; |
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285 | dp->irqInfo.on = nopOn; |
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286 | dp->irqInfo.off = nopOn; |
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287 | dp->irqInfo.isOn = wdIsOn; |
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288 | |
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289 | sc = pc386_install_rtems_irq_handler (&dp->irqInfo); |
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290 | if (!sc) |
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291 | rtems_panic ("Can't attach WD interrupt handler for irq %d\n", |
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292 | dp->irqInfo.name); |
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293 | } |
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294 | |
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295 | |
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296 | /* |
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297 | * Send raw packet (caller provides header). |
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298 | * This code runs in the context of the interface transmit |
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299 | * task or in the context of the network task. |
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300 | */ |
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301 | static int |
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302 | wd8003Enet_raw (struct iface *iface, struct mbuf **bpp) |
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303 | { |
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304 | wd80x3EnetDriver *dp = &wd8003EnetDriver[iface->dev]; |
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305 | struct mbuf *bp; |
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306 | unsigned int len, tport; |
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307 | char *shp; |
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308 | |
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309 | tport = dp->port; |
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310 | |
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311 | /* |
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312 | * Fill in some logging data |
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313 | */ |
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314 | iface->rawsndcnt++; |
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315 | iface->lastsent = secclock (); |
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316 | dump (iface, IF_TRACE_OUT, *bpp); |
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317 | |
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318 | /* |
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319 | * It would not do to have two tasks active in the transmit |
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320 | * loop at the same time. |
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321 | * The blocking is simple-minded since the odds of two tasks |
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322 | * simultaneously attempting to use this code are low. The only |
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323 | * way that two tasks can try to run here is: |
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324 | * 1) Task A enters this code and ends up having to |
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325 | * wait for a transmit buffer descriptor. |
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326 | * 2) Task B gains control and tries to transmit a packet. |
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327 | * The RTEMS/KA9Q scheduling semaphore ensures that there |
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328 | * are no race conditions associated with manipulating the |
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329 | * txWaitTid variable. |
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330 | */ |
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331 | |
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332 | if (dp->txWaitTid) { |
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333 | dp->txRawWait++; |
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334 | while (dp->txWaitTid) |
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335 | rtems_ka9q_ppause (10); |
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336 | } |
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337 | |
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338 | if (dp->txWaitTid == 0) |
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339 | rtems_task_ident (0, 0, &dp->txWaitTid); |
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340 | |
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341 | bp = *bpp; |
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342 | len = 0; |
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343 | shp = dp->base + (SHAPAGE * OUTPAGE); |
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344 | |
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345 | /*rtems_interrupt_disable(level);*/ |
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346 | |
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347 | for (;;){ |
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348 | len += bp->cnt; |
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349 | memcpy(shp, (char *)bp->data, bp->cnt); |
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350 | shp += bp->cnt ; |
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351 | if ((bp = bp->next) == NULL) |
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352 | break; |
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353 | } |
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354 | |
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355 | free_p(bpp); |
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356 | |
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357 | if (len < ET_MINLEN) len = ET_MINLEN; |
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358 | outport_byte(tport+TBCR0, len); |
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359 | outport_byte(tport+TBCR1, (len >> 8) ); |
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360 | outport_byte(tport+TPSR, OUTPAGE); |
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361 | outport_byte(tport+CMDR, MSK_TXP + MSK_RD2); |
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362 | |
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363 | /* |
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364 | * Show that we've finished with the packet |
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365 | */ |
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366 | dp->txWaitTid = 0; |
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367 | return 0; |
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368 | |
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369 | } |
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370 | |
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371 | |
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372 | /* |
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373 | * Shut down the interface |
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374 | * FIXME: This is a pretty simple-minded routine. It doesn't worry |
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375 | * about cleaning up mbufs, shutting down daemons, etc. |
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376 | */ |
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377 | static int |
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378 | wd8003Enet_stop (struct iface *iface) |
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379 | { |
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380 | unsigned int tport; |
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381 | unsigned char temp; |
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382 | /* |
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383 | * Stop the transmitter |
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384 | */ |
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385 | tport=wd8003EnetDriver[0].port ; |
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386 | inport_byte(tport+0x04,temp); |
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387 | outport_byte(tport+0x04, temp & 0x7f); |
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388 | outport_byte(tport + CMDR, MSK_STP + MSK_RD2); |
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389 | return 0; |
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390 | } |
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391 | |
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392 | /* |
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393 | * Show interface statistics |
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394 | */ |
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395 | static void |
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396 | wd8003Enet_show (struct iface *iface) |
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397 | { |
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398 | printf (" Rx Interrupts:%-8lu", wd8003EnetDriver[0].rxInterrupts); |
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399 | printf (" Not First:%-8lu", wd8003EnetDriver[0].rxNotFirst); |
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400 | printf (" Not Last:%-8lu\n", wd8003EnetDriver[0].rxNotLast); |
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401 | printf (" Giant:%-8lu", wd8003EnetDriver[0].rxGiant); |
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402 | printf (" Runt:%-8lu", wd8003EnetDriver[0].rxRunt); |
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403 | printf (" Non-octet:%-8lu\n", wd8003EnetDriver[0].rxNonOctet); |
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404 | printf (" Bad CRC:%-8lu", wd8003EnetDriver[0].rxBadCRC); |
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405 | printf (" Overrun:%-8lu", wd8003EnetDriver[0].rxOverrun); |
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406 | printf (" Collision:%-8lu\n", wd8003EnetDriver[0].rxCollision); |
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407 | printf (" Tx Interrupts:%-8lu", wd8003EnetDriver[0].txInterrupts); |
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408 | printf (" Deferred:%-8lu", wd8003EnetDriver[0].txDeferred); |
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409 | printf (" Missed Hearbeat:%-8lu\n", wd8003EnetDriver[0].txHeartbeat); |
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410 | printf (" No Carrier:%-8lu", wd8003EnetDriver[0].txLostCarrier); |
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411 | printf ("Retransmit Limit:%-8lu", wd8003EnetDriver[0].txRetryLimit); |
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412 | printf (" Late Collision:%-8lu\n", wd8003EnetDriver[0].txLateCollision); |
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413 | printf (" Underrun:%-8lu", wd8003EnetDriver[0].txUnderrun); |
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414 | printf (" Raw output wait:%-8lu\n", wd8003EnetDriver[0].txRawWait); |
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415 | } |
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416 | |
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417 | /* |
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418 | * Attach an WD8003 driver to the system |
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419 | * This is the only `extern' function in the driver. |
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420 | * |
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421 | * argv[0]: interface label, e.g., "rtems" |
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422 | * The remainder of the arguemnts are key/value pairs: |
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423 | * mtu ## -- maximum transmission unit, default 1500 |
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424 | * broadcast y/n -- accept or ignore broadcast packets, default yes |
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425 | * rbuf ## -- Set number of receive buffer descriptors |
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426 | * rbuf ## -- Set number of transmit buffer descriptors |
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427 | * ip ###.###.###.### -- IP address |
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428 | * ether ##:##:##:##:##:## -- Ethernet address |
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429 | * irno -- Set controller irq |
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430 | * port -- Set io port |
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431 | * bpar -- Set RAM address |
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432 | */ |
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433 | int |
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434 | rtems_ka9q_driver_attach (int argc, char *argv[], void *p) |
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435 | { |
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436 | struct iface *iface; |
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437 | wd80x3EnetDriver *dp; |
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438 | char *cp; |
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439 | int i; |
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440 | int argIndex; |
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441 | int broadcastFlag; |
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442 | char cbuf[30]; |
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443 | |
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444 | /* |
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445 | * Find a free driver |
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446 | */ |
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447 | for (i = 0 ; i < NSCCDRIVER ; i++) { |
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448 | if (wd8003EnetDriver[i].iface == NULL) |
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449 | break; |
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450 | } |
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451 | if (i >= NSCCDRIVER) { |
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452 | printf ("Too many SCC drivers.\n"); |
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453 | return -1; |
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454 | } |
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455 | if (if_lookup (argv[0]) != NULL) { |
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456 | printf ("Interface %s already exists\n", argv[0]); |
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457 | return -1; |
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458 | } |
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459 | dp = &wd8003EnetDriver[i]; |
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460 | |
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461 | /* |
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462 | * Create an inteface descriptor |
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463 | */ |
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464 | iface = callocw (1, sizeof *iface); |
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465 | iface->name = strdup (argv[0]); |
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466 | |
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467 | /* |
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468 | * Set default values |
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469 | */ |
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470 | broadcastFlag = 1; |
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471 | dp->txWaitTid = 0; |
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472 | dp->rxBdCount = RX_BUF_COUNT; |
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473 | dp->txBdCount = TX_BUF_COUNT * TX_BD_PER_BUF; |
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474 | dp->irqInfo.name = (rtems_irq_symbolic_name) 5; |
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475 | dp->port = 0x240; |
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476 | dp->base = (unsigned char*) 0xD0000; |
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477 | dp->bpar = 0xD0000; |
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478 | iface->mtu = 1500; |
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479 | iface->addr = Ip_addr; |
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480 | iface->hwaddr = mallocw (EADDR_LEN); |
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481 | memset (iface->hwaddr, 0x08, EADDR_LEN); |
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482 | |
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483 | /* |
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484 | * Parse arguments |
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485 | */ |
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486 | for (argIndex = 1 ; argIndex < (argc - 1) ; argIndex++) { |
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487 | if (strcmp ("mtu", argv[argIndex]) == 0) { |
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488 | iface->mtu = atoi (argv[++argIndex]); |
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489 | } |
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490 | else if (strcmp ("broadcast", argv[argIndex]) == 0) { |
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491 | if (*argv[++argIndex] == 'n') |
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492 | broadcastFlag = 0; |
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493 | } |
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494 | else if (strcmp ("rbuf", argv[argIndex]) == 0) { |
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495 | dp->rxBdCount = atoi (argv[++argIndex]); |
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496 | } |
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497 | else if (strcmp ("tbuf", argv[argIndex]) == 0) { |
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498 | dp->txBdCount = atoi (argv[++argIndex]) * TX_BD_PER_BUF; |
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499 | } |
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500 | else if (strcmp ("ip", argv[argIndex]) == 0) { |
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501 | iface->addr = resolve (argv[++argIndex]); |
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502 | } |
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503 | else if (strcmp ("ether", argv[argIndex]) == 0) { |
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504 | argIndex++; |
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505 | gether (iface->hwaddr, argv[argIndex]); |
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506 | } |
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507 | else if (strcmp ("irno", argv[argIndex]) == 0) { |
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508 | dp->irqInfo.name = (rtems_irq_symbolic_name) atoi (argv[++argIndex]); |
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509 | } |
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510 | else if (strcmp ("port", argv[argIndex]) == 0) { |
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511 | sscanf(argv[++argIndex], "%x", &(dp->port)); |
---|
512 | } |
---|
513 | else if (strcmp ("bpar", argv[argIndex]) == 0) { |
---|
514 | sscanf(argv[++argIndex], "%x", (unsigned) &(dp->bpar)); |
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515 | dp->base = (unsigned char *)(dp->bpar); |
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516 | } |
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517 | else { |
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518 | printf ("Argument %d (%s) is invalid.\n", argIndex, argv[argIndex]); |
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519 | return -1; |
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520 | } |
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521 | } |
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522 | printf ("Ethernet address: %s\n", pether (cbuf, iface->hwaddr)); |
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523 | printf ("Internet address: %s\n", inet_ntoa(iface->addr)); |
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524 | printf ("Irno: %X, port: %X, bpar: %X, base: %X\n",dp->irqInfo.name, dp->port, |
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525 | (unsigned) dp->bpar, (unsigned) dp->base); |
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526 | fflush(stdout); |
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527 | /* |
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528 | * Fill in remainder of interface configuration |
---|
529 | */ |
---|
530 | iface->dev = i; |
---|
531 | iface->raw = wd8003Enet_raw; |
---|
532 | iface->stop = wd8003Enet_stop; |
---|
533 | iface->show = wd8003Enet_show; |
---|
534 | dp->iface = iface; |
---|
535 | setencap (iface, "Ethernet"); |
---|
536 | |
---|
537 | /* |
---|
538 | * Set up SCC hardware |
---|
539 | */ |
---|
540 | wd8003Enet_initialize_hardware (dp, broadcastFlag); |
---|
541 | fflush(stdout); |
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542 | |
---|
543 | /* |
---|
544 | * Chain onto list of interfaces |
---|
545 | */ |
---|
546 | iface->next = Ifaces; |
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547 | Ifaces = iface; |
---|
548 | |
---|
549 | /* calibrate a delay loop for 2 milliseconds */ |
---|
550 | rtems_clock_get(RTEMS_CLOCK_GET_TICKS_PER_SECOND, &loopc ); |
---|
551 | loopc /= 500; |
---|
552 | |
---|
553 | /* |
---|
554 | * Start I/O daemons |
---|
555 | */ |
---|
556 | cp = if_name (iface, " tx"); |
---|
557 | iface->txproc = newproc (cp, 1024, if_tx, iface->dev, iface, NULL, 0); |
---|
558 | free (cp); |
---|
559 | return 0; |
---|
560 | } |
---|
561 | |
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562 | |
---|
563 | |
---|
564 | |
---|
565 | |
---|
566 | |
---|
567 | |
---|