1 | /* |
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2 | ------------------------------------------------------------------------ |
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3 | $Id$ |
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4 | ------------------------------------------------------------------------ |
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5 | |
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6 | My Right Boot, a boot ROM for embedded hardware. |
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7 | |
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8 | Copyright Cybertec Pty Ltd, 2000 |
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9 | All rights reserved Cybertec Pty Ltd, 2000 |
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10 | |
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11 | COPYRIGHT (c) 1989-1998. |
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12 | On-Line Applications Research Corporation (OAR). |
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13 | Copyright assigned to U.S. Government, 1994. |
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14 | |
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15 | The license and distribution terms for this file may be |
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16 | found in the file LICENSE in this distribution or at |
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17 | http://www.OARcorp.com/rtems/license.html. |
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18 | |
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19 | ------------------------------------------------------------------------ |
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20 | |
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21 | CS8900 net boot driver. |
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22 | |
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23 | */ |
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24 | |
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25 | #include <sys/errno.h> |
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26 | #include <string.h> |
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27 | #include <stdio.h> |
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28 | |
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29 | /* #include <target.h> |
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30 | chris explain what this is to contain and provide a default one */ |
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31 | #include "cs8900.h" |
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32 | |
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33 | /*********************************************************** |
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34 | *********************************************************** |
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35 | BEGIN SECTION OF DEFAULT DEFINES |
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36 | *********************************************************** |
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37 | ***********************************************************/ |
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38 | |
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39 | /* |
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40 | * Number of devices supported by this driver |
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41 | */ |
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42 | #ifndef CS8900_DEVICES |
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43 | #define CS8900_DEVICES 1 |
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44 | #endif |
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45 | |
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46 | /* |
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47 | * This variable really should come from a per device configuration |
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48 | * table so the base can vary by adapter. |
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49 | */ |
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50 | |
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51 | #ifndef CS8900_IO_BASE |
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52 | extern unsigned int bsp_cs8900_io_base; |
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53 | #define CS8900_IO_BASE bsp_cs8900_io_base |
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54 | #endif |
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55 | |
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56 | /* |
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57 | * This variable really should come from a per device configuration |
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58 | * table so the base can vary by adapter. |
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59 | */ |
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60 | |
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61 | #ifndef CS8900_MEMORY_BASE |
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62 | extern unsigned int bsp_cs8900_memory_base; |
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63 | #define CS8900_MEMORY_BASE bsp_cs8900_memory_base |
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64 | #endif |
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65 | |
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66 | /* |
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67 | * This could go to a BSP provided callout. |
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68 | */ |
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69 | #ifndef WATCHDOG_TOGGLE |
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70 | #define WATCHDOG_TOGGLE() |
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71 | #endif |
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72 | |
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73 | /* |
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74 | * This variable really should come from a per device configuration |
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75 | * table so the base can vary by adapter. |
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76 | * |
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77 | * chris this is probably not a good default --joel |
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78 | */ |
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79 | |
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80 | #ifndef CS8900_RX_QUEUE_SIZE |
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81 | #define CS8900_RX_QUEUE_SIZE 1 |
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82 | #endif |
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83 | |
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84 | /*********************************************************** |
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85 | *********************************************************** |
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86 | END SECTION OF DEFAULT DEFINES |
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87 | *********************************************************** |
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88 | ***********************************************************/ |
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89 | |
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90 | /* |
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91 | * We expect to be able to read a complete packet into an mbuf. |
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92 | */ |
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93 | |
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94 | #if (MCLBYTES < 1520) |
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95 | #error "CS8900 Driver must have MCLBYTES >= 1520" |
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96 | #endif |
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97 | |
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98 | /* |
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99 | * Task event usage. |
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100 | */ |
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101 | |
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102 | #define CS8900_RX_OK_EVENT RTEMS_EVENT_1 |
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103 | #define CS8900_TX_START_EVENT RTEMS_EVENT_1 |
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104 | #define CS8900_TX_OK_EVENT RTEMS_EVENT_2 |
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105 | #define CS8900_TX_WAIT_EVENT RTEMS_EVENT_3 |
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106 | |
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107 | /* |
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108 | * Our local data. |
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109 | */ |
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110 | |
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111 | static cs8900_device cs8900[CS8900_DEVICES]; |
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112 | |
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113 | /* |
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114 | * IO Packet Page inteface. |
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115 | */ |
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116 | |
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117 | static inline unsigned short |
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118 | io_pp_get_reg_16 (int dev, unsigned short reg) |
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119 | { |
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120 | cs8900_io_set_reg (dev, CS8900_IO_BASE + CS8900_IO_PACKET_PAGE_PTR, |
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121 | 0x3000 | CS8900_PPP_AUTO_INCREMENT | reg); |
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122 | return cs8900_io_get_reg (dev, CS8900_IO_BASE + CS8900_IO_PP_DATA_PORT0); |
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123 | } |
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124 | |
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125 | static inline unsigned long |
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126 | io_pp_get_reg_32 (int dev, unsigned short reg) |
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127 | { |
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128 | cs8900_io_set_reg (dev, CS8900_IO_BASE + CS8900_IO_PACKET_PAGE_PTR, |
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129 | 0x3000 | CS8900_PPP_AUTO_INCREMENT | reg); |
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130 | return ((cs8900_io_get_reg (dev, CS8900_IO_BASE + CS8900_IO_PP_DATA_PORT0) << 16) | |
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131 | cs8900_io_get_reg (dev, CS8900_IO_BASE + CS8900_IO_PP_DATA_PORT1)); |
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132 | } |
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133 | |
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134 | static inline void |
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135 | io_pp_set_reg_16 (int dev, unsigned short reg, unsigned short data) |
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136 | { |
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137 | cs8900_io_set_reg (dev, CS8900_IO_BASE + CS8900_IO_PACKET_PAGE_PTR, |
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138 | 0x3000 | CS8900_PPP_AUTO_INCREMENT | reg); |
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139 | cs8900_io_set_reg (dev, CS8900_IO_BASE + CS8900_IO_PP_DATA_PORT0, data); |
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140 | } |
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141 | |
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142 | static inline void |
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143 | io_pp_set_reg_32 (int dev, unsigned short reg, unsigned long data) |
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144 | { |
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145 | cs8900_io_set_reg (dev, CS8900_IO_BASE + CS8900_IO_PACKET_PAGE_PTR, |
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146 | 0x3000 | CS8900_PPP_AUTO_INCREMENT | reg); |
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147 | cs8900_io_set_reg (dev, CS8900_IO_BASE + CS8900_IO_PP_DATA_PORT0, data >> 16); |
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148 | cs8900_io_set_reg (dev, CS8900_IO_BASE + CS8900_IO_PP_DATA_PORT1, data); |
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149 | } |
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150 | |
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151 | static inline void |
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152 | io_pp_bit_set_reg_16 (int dev, unsigned short reg, unsigned short mask) |
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153 | { |
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154 | io_pp_set_reg_16 (dev, reg, io_pp_get_reg_16 (dev, reg) | mask); |
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155 | } |
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156 | |
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157 | static inline void |
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158 | io_pp_bit_clear_reg_16 (int dev, unsigned short reg, unsigned short mask) |
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159 | { |
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160 | io_pp_set_reg_16 (dev, reg, io_pp_get_reg_16 (dev, reg) & ~mask); |
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161 | } |
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162 | |
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163 | /* |
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164 | * Memory Mapped Packet Page interface. |
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165 | */ |
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166 | |
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167 | static inline unsigned short |
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168 | mem_pp_get_reg (int dev, unsigned short reg) |
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169 | { |
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170 | return cs8900_mem_get_reg (dev, CS8900_MEMORY_BASE + reg); |
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171 | } |
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172 | |
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173 | static inline void |
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174 | mem_pp_set_reg (int dev, unsigned short reg, unsigned short data) |
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175 | { |
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176 | cs8900_mem_set_reg (dev, CS8900_MEMORY_BASE + reg, data); |
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177 | } |
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178 | |
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179 | static inline void |
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180 | mem_pp_bit_set_reg (int dev, unsigned short reg, unsigned short mask) |
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181 | { |
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182 | mem_pp_set_reg (dev, reg, mem_pp_get_reg (dev, reg) | mask); |
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183 | } |
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184 | |
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185 | static inline void |
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186 | mem_pp_bit_clear_reg (int dev, unsigned short reg, unsigned short mask) |
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187 | { |
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188 | mem_pp_set_reg (dev, reg, mem_pp_get_reg (dev, reg) & ~mask); |
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189 | } |
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190 | |
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191 | /* |
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192 | * Trace defines and control structures. |
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193 | */ |
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194 | |
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195 | #define CS8900_T_INT (0) |
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196 | #define CS8900_T_RX_OK (1) |
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197 | #define CS8900_T_RX_DROPPED (2) |
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198 | #define CS8900_T_NO_MBUF (3) |
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199 | #define CS8900_T_NO_CLUSTERS (4) |
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200 | #define CS8900_T_RX_BEGIN (5) |
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201 | #define CS8900_T_RX_END (6) |
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202 | |
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203 | #if CS8900_TRACE |
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204 | |
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205 | static const char *cs8900_trace_labels[] = |
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206 | { |
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207 | "int", |
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208 | "rx ok", |
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209 | "rx dropped", |
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210 | "no mbuf", |
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211 | "no clusters", |
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212 | "rx begin", |
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213 | "rx end" |
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214 | }; |
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215 | |
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216 | /* |
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217 | * Assumes a micro-second timer such as the Coldfire. |
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218 | */ |
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219 | |
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220 | rtems_unsigned32 rtems_read_timer (); |
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221 | |
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222 | static inline void |
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223 | cs8900_trace (cs8900_device *cs, unsigned short key, unsigned long var) |
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224 | { |
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225 | rtems_interrupt_level level; |
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226 | |
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227 | rtems_interrupt_disable (level); |
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228 | |
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229 | if (cs->trace_in < CS8900_TRACE_SIZE) |
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230 | { |
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231 | cs->trace_key[cs->trace_in] = key; |
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232 | cs->trace_var[cs->trace_in] = var; |
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233 | cs->trace_time[cs->trace_in] = rtems_read_timer (); |
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234 | cs->trace_in++; |
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235 | } |
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236 | |
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237 | rtems_interrupt_enable (level); |
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238 | } |
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239 | #else |
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240 | #define cs8900_trace(c, k, v) |
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241 | #endif |
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242 | |
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243 | /* |
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244 | * Bring the chip online. |
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245 | */ |
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246 | |
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247 | static void |
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248 | cs8900_hardware_init (cs8900_device *cs) |
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249 | { |
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250 | unsigned long prod_id; |
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251 | unsigned short status; |
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252 | int dev = cs->dev; |
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253 | |
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254 | /* |
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255 | * Do nothing while the device is calibrating and checking the EEPROM. |
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256 | * We must wait 20msecs. |
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257 | */ |
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258 | |
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259 | io_pp_bit_set_reg_16 (dev, CS8900_PP_SelfCTL, CS8900_SELF_CTRL_RESET); |
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260 | |
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261 | rtems_task_wake_after (TOD_MILLISECONDS_TO_TICKS (20)); |
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262 | |
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263 | status = io_pp_get_reg_16 (dev, CS8900_PP_SelfST); |
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264 | if (status == 0) { |
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265 | printf("Reading status register again\n"); |
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266 | status = io_pp_get_reg_16 (dev, CS8900_PP_SelfST); |
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267 | } |
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268 | |
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269 | if (((status & CS8900_SELF_STATUS_INITD) == 0) || |
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270 | ((status & CS8900_SELF_STATUS_INITD) && |
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271 | (status & CS8900_SELF_STATUS_EEPROM_PRESENT) && |
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272 | (status & CS8900_SELF_STATUS_SIBUST))) |
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273 | { |
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274 | printf ("CS8900: %s. Initialisation aborted.\n", |
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275 | (status & CS8900_SELF_STATUS_INITD) ? |
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276 | "EEPROM read/write failed to complete" : |
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277 | "Failed to complete to reset"); |
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278 | return; |
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279 | } |
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280 | |
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281 | /* Probe the device for its ID */ |
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282 | |
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283 | prod_id = io_pp_get_reg_32 (dev, CS8900_PP_PROD_ID); |
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284 | |
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285 | if ((prod_id >> 16) != CS8900_ESIA_ID) |
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286 | { |
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287 | printf ("CS9800: Invalid EISA ID, read product code 0x%08lx\n", prod_id); |
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288 | return; |
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289 | } |
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290 | |
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291 | if ((prod_id & 0x000000ff) != 0) |
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292 | { |
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293 | printf ("CS9800: Unsupported product id, read product code 0x%08lx\n", |
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294 | prod_id); |
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295 | return; |
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296 | } |
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297 | |
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298 | printf ("CS8900 Rev %ld, %s, %s.\n", |
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299 | (prod_id >> 8) & 0x1f, |
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300 | status & CS8900_SELF_STATUS_3_3_V ? "3.3V" : "5.0V", |
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301 | status & CS8900_SELF_STATUS_EEPROM_PRESENT ? |
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302 | "EEPROM present" : "no EEPROM"); |
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303 | |
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304 | /* |
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305 | * Switch to memory base accesses as they are faster. No indirect access. |
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306 | */ |
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307 | |
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308 | io_pp_set_reg_16 (dev, CS8900_PP_MEM_BASE, CS8900_MEMORY_BASE); |
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309 | io_pp_set_reg_16 (dev, CS8900_PP_MEM_BASE + 2, (CS8900_MEMORY_BASE >> 16) & 0xf); |
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310 | |
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311 | io_pp_set_reg_16 (dev, |
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312 | CS8900_PP_BusCTL, |
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313 | CS8900_BUS_CTRL_RESET_RX_DMA | |
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314 | CS8900_BUS_CTRL_USE_SA | |
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315 | CS8900_BUS_CTRL_MEMORY_ENABLE); |
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316 | io_pp_set_reg_16 (dev, |
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317 | CS8900_PP_BusCTL, |
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318 | CS8900_BUS_CTRL_USE_SA | |
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319 | CS8900_BUS_CTRL_MEMORY_ENABLE); |
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320 | |
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321 | /* |
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322 | * We are now in memory mapped mode. |
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323 | */ |
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324 | |
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325 | /* |
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326 | * Program the Line Control register with the mode we want. |
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327 | * |
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328 | * No auto detect support at the moment. Only 10BaseT. |
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329 | */ |
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330 | |
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331 | mem_pp_set_reg (dev, CS8900_PP_LineCFG, CS8900_LINE_CTRL_10BASET); |
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332 | |
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333 | /* |
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334 | * Ask the user for the MAC address, the program into the device. |
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335 | */ |
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336 | |
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337 | #define MACO(o) cs->arpcom.ac_enaddr[o] |
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338 | |
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339 | mem_pp_set_reg (dev, CS8900_PP_IA, |
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340 | (((unsigned int) MACO (1)) << 8) | |
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341 | ((unsigned int) MACO (0))); |
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342 | mem_pp_set_reg (dev, CS8900_PP_IA + 2, |
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343 | (((unsigned int) MACO (3)) << 8) | |
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344 | ((unsigned int) MACO (2))); |
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345 | mem_pp_set_reg (dev, CS8900_PP_IA + 4, |
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346 | (((unsigned int) MACO (5)) << 8) | |
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347 | ((unsigned int) MACO (4))); |
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348 | |
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349 | /* |
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350 | * Set the Buffer configuration. |
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351 | */ |
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352 | |
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353 | mem_pp_set_reg (dev, CS8900_PP_BufCFG, |
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354 | CS8900_BUFFER_CONFIG_RDY_FOR_TX | |
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355 | CS8900_BUFFER_CONFIG_TX_UNDERRUN | |
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356 | CS8900_BUFFER_CONFIG_TX_COL_OVF | |
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357 | CS8900_BUFFER_CONFIG_RX_MISSED_OVF); |
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358 | |
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359 | /* |
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360 | * Set the Receiver configuration. |
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361 | */ |
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362 | |
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363 | mem_pp_set_reg (dev, CS8900_PP_RxCFG, |
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364 | CS8900_RX_CONFIG_RX_OK | |
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365 | CS8900_RX_CONFIG_CRC_ERROR | |
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366 | CS8900_RX_CONFIG_RUNT| |
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367 | CS8900_RX_CONFIG_EXTRA_DATA); |
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368 | |
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369 | /* |
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370 | * Set the Receiver control. |
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371 | */ |
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372 | |
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373 | mem_pp_set_reg (dev, CS8900_PP_RxCTL, |
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374 | CS8900_RX_CTRL_RX_OK | |
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375 | CS8900_RX_CTRL_MULTICAST | |
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376 | CS8900_RX_CTRL_INDIVIDUAL | |
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377 | CS8900_RX_CTRL_BROADCAST); |
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378 | |
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379 | /* |
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380 | * Set the Transmitter configuration. |
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381 | */ |
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382 | |
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383 | mem_pp_set_reg (dev, CS8900_PP_TxCFG, |
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384 | CS8900_TX_CONFIG_TX_OK | |
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385 | CS8900_TX_CONFIG_OUT_OF_WINDOW | |
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386 | CS8900_TX_CONFIG_JABBER | |
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387 | CS8900_TX_CONFIG_16_COLLISION); |
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388 | |
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389 | /* |
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390 | * Attach the interrupt handler. |
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391 | */ |
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392 | |
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393 | cs8900_attach_interrupt (dev, cs); |
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394 | |
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395 | /* |
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396 | * Program the interrupt level we require then enable interrupts. |
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397 | */ |
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398 | |
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399 | mem_pp_set_reg (dev, CS8900_PP_INT, 0); |
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400 | |
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401 | mem_pp_bit_set_reg (dev, CS8900_PP_BusCTL, |
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402 | CS8900_BUS_CTRL_ENABLE_INT); |
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403 | } |
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404 | |
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405 | rtems_isr |
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406 | cs8900_interrupt (rtems_vector_number v, void *csp) |
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407 | { |
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408 | cs8900_device *cs = csp; |
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409 | int dev = cs->dev; |
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410 | unsigned short isq = 0; |
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411 | struct mbuf *m; |
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412 | unsigned char *p; |
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413 | |
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414 | ++cs->eth_stats.interrupts; |
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415 | |
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416 | while (1) |
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417 | { |
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418 | isq = mem_pp_get_reg (dev, CS8900_PP_ISQ); |
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419 | |
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420 | cs8900_trace (cs, CS8900_T_INT, isq); |
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421 | |
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422 | WATCHDOG_TOGGLE (); |
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423 | |
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424 | /* |
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425 | * No more interrupts to service. |
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426 | */ |
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427 | |
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428 | if (isq == 0) |
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429 | return; |
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430 | |
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431 | switch (isq & 0x1f) |
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432 | { |
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433 | case 0x04: |
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434 | |
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435 | /* |
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436 | * RxEvent. |
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437 | */ |
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438 | |
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439 | ++cs->eth_stats.rx_interrupts; |
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440 | |
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441 | if (isq & CS8900_RX_EVENT_RX_OK) |
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442 | { |
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443 | m = cs->rx_ready_head; |
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444 | if (m) |
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445 | { |
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446 | cs->rx_ready_head = m->m_nextpkt; |
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447 | if (cs->rx_ready_head == 0) |
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448 | cs->rx_ready_tail = 0; |
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449 | m->m_nextpkt = 0; |
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450 | cs->rx_ready_len--; |
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451 | |
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452 | p = mtod (m, unsigned char *); |
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453 | |
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454 | m->m_pkthdr.len = cs8900_get_data_block (dev, p); |
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455 | |
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456 | if (cs->rx_loaded_tail == 0) |
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457 | cs->rx_loaded_head = m; |
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458 | else |
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459 | cs->rx_loaded_tail->m_nextpkt = m; |
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460 | cs->rx_loaded_tail = m; |
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461 | cs->rx_loaded_len++; |
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462 | |
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463 | if (cs->rx_loaded_len == 1) |
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464 | { |
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465 | cs8900_trace (cs, CS8900_T_RX_OK, cs->rx_loaded_len); |
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466 | rtems_event_send (cs->rx_task, CS8900_RX_OK_EVENT); |
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467 | } |
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468 | } |
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469 | else |
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470 | { |
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471 | ++cs->eth_stats.rx_dropped; |
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472 | |
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473 | cs8900_trace (cs, CS8900_T_RX_DROPPED, cs->rx_loaded_len); |
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474 | |
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475 | if (cs->rx_loaded_len == 0) |
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476 | rtems_event_send (cs->rx_task, CS8900_RX_OK_EVENT); |
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477 | } |
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478 | } |
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479 | else |
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480 | { |
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481 | if (isq & CS8900_RX_EVENT_CRC_ERROR) |
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482 | ++cs->eth_stats.rx_crc_errors; |
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483 | |
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484 | if (isq & CS8900_RX_EVENT_RUNT) |
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485 | ++cs->eth_stats.rx_runt_errors; |
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486 | |
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487 | if (isq & CS8900_RX_EVENT_EXTRA_DATA) |
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488 | ++cs->eth_stats.rx_oversize_errors; |
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489 | } |
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490 | break; |
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491 | |
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492 | case 0x08: |
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493 | |
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494 | /* |
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495 | * TxEvent. |
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496 | */ |
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497 | |
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498 | ++cs->eth_stats.tx_interrupts; |
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499 | |
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500 | if (cs->tx_active) |
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501 | { |
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502 | if (isq & CS8900_TX_EVENT_TX_OK) |
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503 | ++cs->eth_stats.tx_ok; |
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504 | |
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505 | cs->tx_active = 0; |
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506 | |
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507 | rtems_event_send (cs->tx_task, CS8900_TX_OK_EVENT); |
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508 | } |
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509 | break; |
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510 | |
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511 | case 0x0c: |
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512 | |
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513 | /* |
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514 | * BufEvent. |
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515 | */ |
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516 | |
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517 | if (isq & CS8900_BUFFER_EVENT_RDY_FOR_TX) |
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518 | { |
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519 | if (cs->tx_active) |
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520 | { |
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521 | ++cs->eth_stats.tx_rdy4tx; |
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522 | rtems_event_send (cs->tx_task, CS8900_TX_WAIT_EVENT); |
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523 | } |
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524 | } |
---|
525 | else if (isq & CS8900_BUFFER_EVENT_TX_UNDERRUN) |
---|
526 | { |
---|
527 | ++cs->eth_stats.tx_underrun_errors; |
---|
528 | if (cs->tx_active) |
---|
529 | rtems_event_send (cs->tx_task, CS8900_TX_OK_EVENT); |
---|
530 | } |
---|
531 | else if (isq & CS8900_BUFFER_EVENT_SW_INT) |
---|
532 | { |
---|
533 | ++cs->eth_stats.int_swint_res; |
---|
534 | } |
---|
535 | break; |
---|
536 | |
---|
537 | case 0x10: |
---|
538 | |
---|
539 | /* |
---|
540 | * RxMiss. |
---|
541 | */ |
---|
542 | |
---|
543 | cs->eth_stats.rx_missed_errors += |
---|
544 | mem_pp_get_reg (dev, CS8900_PP_RxMISS) >> 6; |
---|
545 | break; |
---|
546 | |
---|
547 | case 0x12: |
---|
548 | |
---|
549 | /* |
---|
550 | * TxCol. |
---|
551 | */ |
---|
552 | |
---|
553 | cs->eth_stats.tx_collisions += |
---|
554 | mem_pp_get_reg (dev, CS8900_PP_TxCol) >> 6; |
---|
555 | break; |
---|
556 | |
---|
557 | default: |
---|
558 | break; |
---|
559 | } |
---|
560 | } |
---|
561 | |
---|
562 | } |
---|
563 | |
---|
564 | int |
---|
565 | cs8900_link_active (int dev) |
---|
566 | { |
---|
567 | return ((mem_pp_get_reg (dev, CS8900_PP_LineST) & CS8900_LINE_STATUS_LINK_OK) ? |
---|
568 | 1 : 0); |
---|
569 | } |
---|
570 | |
---|
571 | static inline void |
---|
572 | cs8900_rx_refill_queue (cs8900_device *cs) |
---|
573 | { |
---|
574 | struct ifnet *ifp = &cs->arpcom.ac_if; |
---|
575 | struct mbuf *m; |
---|
576 | rtems_interrupt_level level; |
---|
577 | |
---|
578 | /* |
---|
579 | * Hold a single queue of mbuf's at the interface. This |
---|
580 | * will lower the latency of the driver. |
---|
581 | */ |
---|
582 | |
---|
583 | while (cs->rx_ready_len < CS8900_RX_QUEUE_SIZE) |
---|
584 | { |
---|
585 | MGETHDR (m, M_DONTWAIT, MT_DATA); |
---|
586 | |
---|
587 | if (!m) |
---|
588 | { |
---|
589 | ++cs->eth_stats.rx_no_mbufs; |
---|
590 | cs8900_trace (cs, CS8900_T_NO_MBUF, cs->eth_stats.rx_no_mbufs); |
---|
591 | return; |
---|
592 | } |
---|
593 | |
---|
594 | MCLGET (m, M_DONTWAIT); |
---|
595 | |
---|
596 | if (!m->m_ext.ext_buf) |
---|
597 | { |
---|
598 | ++cs->eth_stats.rx_no_clusters; |
---|
599 | cs8900_trace (cs, CS8900_T_NO_CLUSTERS, cs->eth_stats.rx_no_clusters); |
---|
600 | m_free (m); |
---|
601 | return; |
---|
602 | } |
---|
603 | m->m_pkthdr.rcvif = ifp; |
---|
604 | m->m_nextpkt = 0; |
---|
605 | |
---|
606 | rtems_interrupt_disable (level); |
---|
607 | |
---|
608 | if (cs->rx_ready_tail == 0) |
---|
609 | cs->rx_ready_head = m; |
---|
610 | else |
---|
611 | cs->rx_ready_tail->m_nextpkt = m; |
---|
612 | cs->rx_ready_tail = m; |
---|
613 | cs->rx_ready_len++; |
---|
614 | |
---|
615 | rtems_interrupt_enable (level); |
---|
616 | } |
---|
617 | } |
---|
618 | |
---|
619 | static void |
---|
620 | cs8900_rx_task (void *arg) |
---|
621 | { |
---|
622 | cs8900_device *cs = arg; |
---|
623 | int dev = cs->dev; |
---|
624 | struct ifnet *ifp = &cs->arpcom.ac_if; |
---|
625 | rtems_event_set events; |
---|
626 | struct mbuf *m; |
---|
627 | struct ether_header *eh; |
---|
628 | rtems_status_code sc; |
---|
629 | rtems_interrupt_level level; |
---|
630 | |
---|
631 | /* |
---|
632 | * Turn the receiver and transmitter on. |
---|
633 | */ |
---|
634 | |
---|
635 | mem_pp_bit_set_reg (dev, CS8900_PP_LineCFG, |
---|
636 | CS8900_LINE_CTRL_RX_ON | |
---|
637 | CS8900_LINE_CTRL_TX_ON); |
---|
638 | |
---|
639 | /* |
---|
640 | * Start the software interrupt watchdog. |
---|
641 | */ |
---|
642 | |
---|
643 | rtems_interrupt_disable (level); |
---|
644 | mem_pp_bit_set_reg (dev, CS8900_PP_BufCFG, |
---|
645 | CS8900_BUFFER_CONFIG_SW_INT); |
---|
646 | ++cs->eth_stats.int_swint_req; |
---|
647 | rtems_interrupt_enable (level); |
---|
648 | |
---|
649 | /* |
---|
650 | * Loop reading packets. |
---|
651 | */ |
---|
652 | |
---|
653 | while (1) |
---|
654 | { |
---|
655 | cs8900_rx_refill_queue (cs); |
---|
656 | |
---|
657 | sc = rtems_bsdnet_event_receive (CS8900_RX_OK_EVENT, |
---|
658 | RTEMS_WAIT | RTEMS_EVENT_ANY, |
---|
659 | TOD_MILLISECONDS_TO_TICKS (250), |
---|
660 | &events); |
---|
661 | |
---|
662 | cs8900_rx_refill_queue (cs); |
---|
663 | |
---|
664 | if (sc == RTEMS_TIMEOUT) |
---|
665 | { |
---|
666 | /* |
---|
667 | * We need to check the interrupt hardware in the cs8900a |
---|
668 | * has not locked up. It seems this occurs if the ISQ |
---|
669 | * queue fills up. |
---|
670 | * To test we generate a software interrupt and watch |
---|
671 | * a counter go up. If the counter does not go for 2 |
---|
672 | * software interrupts requests we flush the ISQ queue. |
---|
673 | */ |
---|
674 | |
---|
675 | if ((cs->eth_stats.int_swint_req - cs->eth_stats.int_swint_res) > 1) |
---|
676 | { |
---|
677 | printf ("cs8900: int lockup, isq flush\n"); |
---|
678 | |
---|
679 | mem_pp_bit_clear_reg (dev, CS8900_PP_BusCTL, |
---|
680 | CS8900_BUS_CTRL_ENABLE_INT); |
---|
681 | |
---|
682 | while (mem_pp_get_reg (dev, CS8900_PP_ISQ) != 0); |
---|
683 | |
---|
684 | cs->eth_stats.int_swint_req = cs->eth_stats.int_swint_res = 0; |
---|
685 | ++cs->eth_stats.int_lockup; |
---|
686 | |
---|
687 | mem_pp_bit_set_reg (dev, CS8900_PP_BusCTL, |
---|
688 | CS8900_BUS_CTRL_ENABLE_INT); |
---|
689 | } |
---|
690 | |
---|
691 | rtems_interrupt_disable (level); |
---|
692 | mem_pp_bit_set_reg (dev, CS8900_PP_BufCFG, |
---|
693 | CS8900_BUFFER_CONFIG_SW_INT); |
---|
694 | ++cs->eth_stats.int_swint_req; |
---|
695 | rtems_interrupt_enable (level); |
---|
696 | } |
---|
697 | |
---|
698 | cs8900_trace (cs, CS8900_T_RX_BEGIN, cs->rx_loaded_len); |
---|
699 | |
---|
700 | while (cs->rx_loaded_len) |
---|
701 | { |
---|
702 | rtems_interrupt_disable (level); |
---|
703 | |
---|
704 | m = cs->rx_loaded_head; |
---|
705 | if (m) |
---|
706 | { |
---|
707 | cs->rx_loaded_head = m->m_nextpkt; |
---|
708 | if (cs->rx_loaded_head == 0) |
---|
709 | cs->rx_loaded_tail = 0; |
---|
710 | m->m_nextpkt = 0; |
---|
711 | cs->rx_loaded_len--; |
---|
712 | |
---|
713 | rtems_interrupt_enable (level); |
---|
714 | |
---|
715 | m->m_pkthdr.rcvif = ifp; |
---|
716 | |
---|
717 | cs->eth_stats.rx_bytes += m->m_pkthdr.len; |
---|
718 | |
---|
719 | m->m_len = m->m_pkthdr.len = m->m_pkthdr.len - sizeof (struct ether_header); |
---|
720 | |
---|
721 | eh = mtod (m, struct ether_header *); |
---|
722 | m->m_data += sizeof (struct ether_header); |
---|
723 | |
---|
724 | ++cs->eth_stats.rx_packets; |
---|
725 | |
---|
726 | ether_input (ifp, eh, m); |
---|
727 | } |
---|
728 | else |
---|
729 | { |
---|
730 | rtems_interrupt_enable (level); |
---|
731 | } |
---|
732 | } |
---|
733 | cs8900_trace (cs, CS8900_T_RX_END, cs->rx_loaded_len); |
---|
734 | } |
---|
735 | } |
---|
736 | |
---|
737 | static void |
---|
738 | cs8900_tx_task (void *arg) |
---|
739 | { |
---|
740 | cs8900_device *cs = arg; |
---|
741 | int dev = cs->dev; |
---|
742 | struct ifnet *ifp = &cs->arpcom.ac_if; |
---|
743 | rtems_event_set events; |
---|
744 | struct mbuf *m; |
---|
745 | rtems_status_code sc; |
---|
746 | |
---|
747 | /* |
---|
748 | * Wait for the link to come up. |
---|
749 | */ |
---|
750 | |
---|
751 | rtems_task_wake_after (TOD_MILLISECONDS_TO_TICKS (750)); |
---|
752 | |
---|
753 | /* |
---|
754 | * Loop processing the tx queue. |
---|
755 | */ |
---|
756 | |
---|
757 | while (1) |
---|
758 | { |
---|
759 | /* |
---|
760 | * Fetch the mbuf list from the interface's queue. |
---|
761 | */ |
---|
762 | |
---|
763 | IF_DEQUEUE (&ifp->if_snd, m); |
---|
764 | |
---|
765 | /* |
---|
766 | * If something actually is present send it. |
---|
767 | */ |
---|
768 | |
---|
769 | if (!m) |
---|
770 | { |
---|
771 | ifp->if_flags &= ~IFF_OACTIVE; |
---|
772 | |
---|
773 | rtems_bsdnet_event_receive (CS8900_TX_START_EVENT, |
---|
774 | RTEMS_WAIT | RTEMS_EVENT_ANY, |
---|
775 | RTEMS_NO_TIMEOUT, |
---|
776 | &events); |
---|
777 | } |
---|
778 | else |
---|
779 | { |
---|
780 | if (cs8900_link_active (dev)) |
---|
781 | { |
---|
782 | int resending; |
---|
783 | |
---|
784 | do |
---|
785 | { |
---|
786 | unsigned short buf_status; |
---|
787 | |
---|
788 | resending = 0; |
---|
789 | |
---|
790 | cs->tx_active = 1; |
---|
791 | |
---|
792 | mem_pp_set_reg (dev, CS8900_PP_TxCMD, |
---|
793 | CS8900_TX_CMD_STATUS_TX_START_ENTIRE | |
---|
794 | CS8900_TX_CMD_STATUS_FORCE); |
---|
795 | mem_pp_set_reg (dev, CS8900_PP_TxLength, m->m_pkthdr.len); |
---|
796 | |
---|
797 | buf_status = mem_pp_get_reg (dev, CS8900_PP_BusST); |
---|
798 | |
---|
799 | /* |
---|
800 | * If the bid for memory in the device fails trash the |
---|
801 | * transmit and try again next time. |
---|
802 | */ |
---|
803 | |
---|
804 | if (buf_status & CS8900_BUS_STATUS_TX_BID_ERROR) |
---|
805 | ++cs->eth_stats.tx_bid_errors; |
---|
806 | else |
---|
807 | { |
---|
808 | /* |
---|
809 | * If the buffer is not read enable the interrupt and then wait. |
---|
810 | */ |
---|
811 | |
---|
812 | if ((buf_status & CS8900_BUS_STATUS_RDY_FOR_TX_NOW) == 0) |
---|
813 | { |
---|
814 | cs->eth_stats.tx_wait_for_rdy4tx++; |
---|
815 | sc = rtems_bsdnet_event_receive (CS8900_TX_WAIT_EVENT, |
---|
816 | RTEMS_WAIT | RTEMS_EVENT_ANY, |
---|
817 | TOD_MILLISECONDS_TO_TICKS (750), |
---|
818 | &events); |
---|
819 | if (sc == RTEMS_TIMEOUT) |
---|
820 | { |
---|
821 | /* |
---|
822 | * For some reason the wait request has been dropped, |
---|
823 | * so lets resend from the start. |
---|
824 | */ |
---|
825 | |
---|
826 | printf ("tx resend\n"); |
---|
827 | ++cs->eth_stats.tx_resends; |
---|
828 | resending = 1; |
---|
829 | } |
---|
830 | } |
---|
831 | |
---|
832 | if (!resending) |
---|
833 | { |
---|
834 | cs8900_tx_load (dev, m); |
---|
835 | cs->eth_stats.tx_packets++; |
---|
836 | cs->eth_stats.tx_bytes += m->m_pkthdr.len; |
---|
837 | } |
---|
838 | } |
---|
839 | } |
---|
840 | while (resending); |
---|
841 | |
---|
842 | m_freem (m); |
---|
843 | |
---|
844 | do |
---|
845 | { |
---|
846 | rtems_bsdnet_event_receive (CS8900_TX_OK_EVENT, |
---|
847 | RTEMS_WAIT | RTEMS_EVENT_ANY, |
---|
848 | RTEMS_NO_TIMEOUT, |
---|
849 | &events); |
---|
850 | } |
---|
851 | while (cs->tx_active); |
---|
852 | } |
---|
853 | else |
---|
854 | { |
---|
855 | ++cs->eth_stats.tx_dropped; |
---|
856 | m_freem (m); |
---|
857 | } |
---|
858 | } |
---|
859 | } |
---|
860 | } |
---|
861 | |
---|
862 | static void |
---|
863 | cs8900_start (struct ifnet *ifp) |
---|
864 | { |
---|
865 | cs8900_device *cs = ifp->if_softc; |
---|
866 | |
---|
867 | /* |
---|
868 | * Tell the transmit daemon to wake up and send a packet. |
---|
869 | */ |
---|
870 | |
---|
871 | ifp->if_flags |= IFF_OACTIVE; |
---|
872 | |
---|
873 | rtems_event_send (cs->tx_task, CS8900_TX_START_EVENT); |
---|
874 | } |
---|
875 | |
---|
876 | static void |
---|
877 | cs8900_stop (cs8900_device *cs) |
---|
878 | { |
---|
879 | int dev = cs->dev; |
---|
880 | |
---|
881 | mem_pp_bit_clear_reg (dev, CS8900_PP_LineCFG, |
---|
882 | CS8900_LINE_CTRL_RX_ON | |
---|
883 | CS8900_LINE_CTRL_TX_ON); |
---|
884 | |
---|
885 | mem_pp_bit_clear_reg (dev, CS8900_PP_BusCTL, |
---|
886 | CS8900_BUS_CTRL_ENABLE_INT); |
---|
887 | } |
---|
888 | |
---|
889 | static const char *eth_statistics_labels[] = |
---|
890 | { |
---|
891 | "rx packets", |
---|
892 | "tx packets", |
---|
893 | "rx bytes", |
---|
894 | "tx bytes", |
---|
895 | "rx interrupts", |
---|
896 | "tx interrupts", |
---|
897 | "rx dropped", |
---|
898 | "rx no mbuf", |
---|
899 | "rx no custers", |
---|
900 | "rx oversize errors", |
---|
901 | "rx crc errors", |
---|
902 | "rx runt errors", |
---|
903 | "rx missed errors", |
---|
904 | "tx ok", |
---|
905 | "tx collisions", |
---|
906 | "tx bid errors", |
---|
907 | "tx wait for rdy4tx", |
---|
908 | "tx rdy4tx", |
---|
909 | "tx underrun errors", |
---|
910 | "tx dropped", |
---|
911 | "tx resends", |
---|
912 | "int swint req", |
---|
913 | "int swint res", |
---|
914 | "int lockup", |
---|
915 | "interrupts" |
---|
916 | }; |
---|
917 | |
---|
918 | static void |
---|
919 | cs8900_stats (cs8900_device *cs) |
---|
920 | { |
---|
921 | int dev = cs->dev; |
---|
922 | int i; |
---|
923 | int max_label = 0; |
---|
924 | int len; |
---|
925 | unsigned long *value = (unsigned long*) &cs->eth_stats.rx_packets; |
---|
926 | |
---|
927 | cs->eth_stats.rx_missed_errors += |
---|
928 | mem_pp_get_reg (dev, CS8900_PP_RxMISS) >> 6; |
---|
929 | |
---|
930 | cs->eth_stats.tx_collisions += |
---|
931 | mem_pp_get_reg (dev, CS8900_PP_TxCol) >> 6; |
---|
932 | |
---|
933 | printf ("Network Driver Stats for CS8900 :\n"); |
---|
934 | |
---|
935 | for (i = 0; i < (sizeof (eth_statistics_labels) / sizeof (const char *)); i++) |
---|
936 | { |
---|
937 | len = strlen (eth_statistics_labels[i]); |
---|
938 | if (len > max_label) |
---|
939 | max_label = len; |
---|
940 | } |
---|
941 | |
---|
942 | max_label += 2; |
---|
943 | |
---|
944 | printf ("%*s - %10u %*s - %10u\n", |
---|
945 | max_label, "rx ready len", cs->rx_ready_len, |
---|
946 | max_label, "rx loaded len", cs->rx_loaded_len); |
---|
947 | |
---|
948 | for (i = 0; |
---|
949 | i < (sizeof (eth_statistics_labels) / sizeof (const char *)); |
---|
950 | i++) |
---|
951 | { |
---|
952 | printf ("%*s - %10lu", |
---|
953 | max_label, eth_statistics_labels[i], value[i]); |
---|
954 | |
---|
955 | i++; |
---|
956 | |
---|
957 | if (i < (sizeof (eth_statistics_labels) / sizeof (const char *))) |
---|
958 | printf (" %*s - %10lu", |
---|
959 | max_label, eth_statistics_labels[i], value[i]); |
---|
960 | printf ("\n"); |
---|
961 | } |
---|
962 | |
---|
963 | #if CS8900_TRACE |
---|
964 | |
---|
965 | for (i = 0; i < cs->trace_in; i++) |
---|
966 | { |
---|
967 | printf ("%8ld.%03ld ", cs->trace_time[i] / 1000, cs->trace_time[i] % 1000); |
---|
968 | |
---|
969 | if (cs->trace_key[i] < sizeof (cs8900_trace_labels) / sizeof (char*)) |
---|
970 | printf ("%s : ", cs8900_trace_labels[cs->trace_key[i]]); |
---|
971 | else |
---|
972 | printf ("unknown trace key, %d : ", cs->trace_key[i]); |
---|
973 | |
---|
974 | if (cs->trace_key[i] == CS8900_T_INT) |
---|
975 | { |
---|
976 | printf ("0x%04lx ", cs->trace_var[i]); |
---|
977 | if (cs->trace_var[i] == 0) |
---|
978 | printf ("end"); |
---|
979 | else |
---|
980 | { |
---|
981 | switch (cs->trace_var[i] & 0x1f) |
---|
982 | { |
---|
983 | case 0x04: |
---|
984 | printf ("rx event"); |
---|
985 | break; |
---|
986 | |
---|
987 | case 0x08: |
---|
988 | printf ("tx event"); |
---|
989 | break; |
---|
990 | |
---|
991 | case 0x0c: |
---|
992 | printf ("buffer event"); |
---|
993 | break; |
---|
994 | |
---|
995 | case 0x10: |
---|
996 | printf ("rx missed"); |
---|
997 | break; |
---|
998 | |
---|
999 | case 0x12: |
---|
1000 | printf ("tx collisions"); |
---|
1001 | break; |
---|
1002 | |
---|
1003 | case 0x1f: |
---|
1004 | printf ("tx request"); |
---|
1005 | break; |
---|
1006 | |
---|
1007 | case 0x1e: |
---|
1008 | printf ("tx wait 4 tx"); |
---|
1009 | break; |
---|
1010 | |
---|
1011 | case 0x1d: |
---|
1012 | printf ("tx already active"); |
---|
1013 | break; |
---|
1014 | |
---|
1015 | default: |
---|
1016 | printf ("unknown event"); |
---|
1017 | break; |
---|
1018 | } |
---|
1019 | } |
---|
1020 | } |
---|
1021 | else |
---|
1022 | printf ("0x%08lx", cs->trace_var[i]); |
---|
1023 | |
---|
1024 | printf ("\n"); |
---|
1025 | } |
---|
1026 | |
---|
1027 | cs->trace_in = 0; |
---|
1028 | |
---|
1029 | #endif |
---|
1030 | } |
---|
1031 | |
---|
1032 | static void |
---|
1033 | cs8900_init (void *arg) |
---|
1034 | { |
---|
1035 | cs8900_device *cs = arg; |
---|
1036 | int dev = cs->dev; |
---|
1037 | struct ifnet *ifp = &cs->arpcom.ac_if; |
---|
1038 | |
---|
1039 | if (cs->rx_task == 0) |
---|
1040 | { |
---|
1041 | |
---|
1042 | /* |
---|
1043 | * Set up the hardware. |
---|
1044 | */ |
---|
1045 | |
---|
1046 | cs8900_hardware_init (cs); |
---|
1047 | |
---|
1048 | /* |
---|
1049 | * Start driver task. We have only one task. |
---|
1050 | */ |
---|
1051 | |
---|
1052 | cs->rx_task = rtems_bsdnet_newproc ("CSr0", 4096, cs8900_rx_task, cs); |
---|
1053 | cs->tx_task = rtems_bsdnet_newproc ("CSt0", 4096, cs8900_tx_task, cs); |
---|
1054 | } |
---|
1055 | |
---|
1056 | #ifdef todo |
---|
1057 | /* |
---|
1058 | * Set flags appropriately |
---|
1059 | */ |
---|
1060 | if (ifp->if_flags & IFF_PROMISC) |
---|
1061 | else |
---|
1062 | #endif |
---|
1063 | |
---|
1064 | /* |
---|
1065 | * Tell the world that we're running. |
---|
1066 | */ |
---|
1067 | |
---|
1068 | ifp->if_flags |= IFF_RUNNING; |
---|
1069 | |
---|
1070 | /* |
---|
1071 | * Set the Line Control to bring the receive and transmitter online. |
---|
1072 | */ |
---|
1073 | |
---|
1074 | mem_pp_bit_set_reg (dev, CS8900_PP_LineCFG, |
---|
1075 | CS8900_LINE_CTRL_RX_ON | |
---|
1076 | CS8900_LINE_CTRL_TX_ON); |
---|
1077 | |
---|
1078 | mem_pp_bit_set_reg (dev, CS8900_PP_BusCTL, |
---|
1079 | CS8900_BUS_CTRL_ENABLE_INT); |
---|
1080 | } |
---|
1081 | |
---|
1082 | static int |
---|
1083 | cs8900_ioctl (struct ifnet *ifp, int cmd, caddr_t data) |
---|
1084 | { |
---|
1085 | cs8900_device *cs = ifp->if_softc; |
---|
1086 | int error = 0; |
---|
1087 | |
---|
1088 | switch (cmd) |
---|
1089 | { |
---|
1090 | case SIOCGIFADDR: |
---|
1091 | case SIOCSIFADDR: |
---|
1092 | |
---|
1093 | error = ether_ioctl (ifp, cmd, data); |
---|
1094 | break; |
---|
1095 | |
---|
1096 | case SIOCSIFFLAGS: |
---|
1097 | |
---|
1098 | switch (ifp->if_flags & (IFF_UP | IFF_RUNNING)) |
---|
1099 | { |
---|
1100 | case IFF_RUNNING: |
---|
1101 | |
---|
1102 | cs8900_stop (cs); |
---|
1103 | break; |
---|
1104 | |
---|
1105 | case IFF_UP: |
---|
1106 | |
---|
1107 | cs8900_init (cs); |
---|
1108 | break; |
---|
1109 | |
---|
1110 | case IFF_UP | IFF_RUNNING: |
---|
1111 | |
---|
1112 | cs8900_stop (cs); |
---|
1113 | cs8900_init (cs); |
---|
1114 | break; |
---|
1115 | |
---|
1116 | default: |
---|
1117 | break; |
---|
1118 | } |
---|
1119 | break; |
---|
1120 | |
---|
1121 | case SIO_RTEMS_SHOW_STATS: |
---|
1122 | |
---|
1123 | cs8900_stats (cs); |
---|
1124 | break; |
---|
1125 | |
---|
1126 | /* FIXME: Multicast commands must be added here. */ |
---|
1127 | |
---|
1128 | default: |
---|
1129 | error = EINVAL; |
---|
1130 | break; |
---|
1131 | } |
---|
1132 | |
---|
1133 | return error; |
---|
1134 | } |
---|
1135 | |
---|
1136 | int |
---|
1137 | cs8900_driver_attach (struct rtems_bsdnet_ifconfig *config, int attaching) |
---|
1138 | { |
---|
1139 | cs8900_device *cs; |
---|
1140 | struct ifnet *ifp; |
---|
1141 | int mtu; |
---|
1142 | int unit; |
---|
1143 | char *name; |
---|
1144 | |
---|
1145 | /* |
---|
1146 | * Parse driver name |
---|
1147 | */ |
---|
1148 | |
---|
1149 | if ((unit = rtems_bsdnet_parse_driver_name (config, &name)) < 0) |
---|
1150 | return 0; |
---|
1151 | |
---|
1152 | /* |
---|
1153 | * Is driver free? |
---|
1154 | */ |
---|
1155 | |
---|
1156 | if (unit >= CS8900_DEVICES) |
---|
1157 | { |
---|
1158 | printf ("Bad CS8900 unit number for device `%s'.\n", config->name); |
---|
1159 | return 0; |
---|
1160 | } |
---|
1161 | |
---|
1162 | cs = &cs8900[unit]; |
---|
1163 | cs->dev = unit; |
---|
1164 | ifp = &cs->arpcom.ac_if; |
---|
1165 | |
---|
1166 | if (attaching) |
---|
1167 | { |
---|
1168 | if (ifp->if_softc) |
---|
1169 | { |
---|
1170 | printf ("Driver `%s' already in use.\n", config->name); |
---|
1171 | return 0; |
---|
1172 | } |
---|
1173 | |
---|
1174 | /* |
---|
1175 | * Process options |
---|
1176 | */ |
---|
1177 | |
---|
1178 | if (config->hardware_address) |
---|
1179 | memcpy (cs->arpcom.ac_enaddr, config->hardware_address, ETHER_ADDR_LEN); |
---|
1180 | else |
---|
1181 | cs8900_get_mac_addr (unit, cs->arpcom.ac_enaddr); |
---|
1182 | |
---|
1183 | if (config->mtu) |
---|
1184 | mtu = config->mtu; |
---|
1185 | else |
---|
1186 | mtu = ETHERMTU; |
---|
1187 | |
---|
1188 | cs->accept_bcast = !config->ignore_broadcast; |
---|
1189 | |
---|
1190 | /* |
---|
1191 | * Set up network interface values. |
---|
1192 | */ |
---|
1193 | |
---|
1194 | ifp->if_softc = cs; |
---|
1195 | ifp->if_unit = unit; |
---|
1196 | ifp->if_name = name; |
---|
1197 | ifp->if_mtu = mtu; |
---|
1198 | ifp->if_init = cs8900_init; |
---|
1199 | ifp->if_ioctl = cs8900_ioctl; |
---|
1200 | ifp->if_start = cs8900_start; |
---|
1201 | ifp->if_output = ether_output; |
---|
1202 | ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX; |
---|
1203 | |
---|
1204 | if (ifp->if_snd.ifq_maxlen == 0) |
---|
1205 | ifp->if_snd.ifq_maxlen = ifqmaxlen; |
---|
1206 | |
---|
1207 | /* |
---|
1208 | * Attach the interface to the stack. |
---|
1209 | */ |
---|
1210 | |
---|
1211 | if_attach (ifp); |
---|
1212 | ether_ifattach (ifp); |
---|
1213 | } |
---|
1214 | else |
---|
1215 | { |
---|
1216 | if (!ifp->if_softc) |
---|
1217 | { |
---|
1218 | printf ("Driver `%s' not found.\n", config->name); |
---|
1219 | return 0; |
---|
1220 | } |
---|
1221 | |
---|
1222 | cs8900_stop (cs); |
---|
1223 | cs8900_detach_interrupt (unit); |
---|
1224 | } |
---|
1225 | |
---|
1226 | return 1; |
---|
1227 | |
---|
1228 | } |
---|