1 | /* |
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2 | ------------------------------------------------------------------------ |
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3 | |
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4 | Copyright Cybertec Pty Ltd, 2000 |
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5 | All rights reserved Cybertec Pty Ltd, 2000 |
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6 | |
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7 | Port to the DIMM PC copyright (c) 2004 Angelo Fraietta |
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8 | This project has been assisted by the Commonwealth Government |
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9 | through the Australia Council, its arts funding and advisory body. |
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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 | |
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14 | The license and distribution terms for this file may be |
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15 | found in the file LICENSE in this distribution or at |
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16 | http://www.rtems.org/license/LICENSE. |
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17 | |
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18 | ------------------------------------------------------------------------ |
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19 | |
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20 | CS8900 RTEMS driver. |
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21 | |
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22 | See the header file for details. |
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23 | |
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24 | */ |
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25 | |
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26 | #define __INSIDE_RTEMS_BSD_TCPIP_STACK__ |
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27 | |
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28 | #include <errno.h> |
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29 | #include <string.h> |
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30 | #include <stdio.h> |
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31 | |
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32 | #include <libchip/cs8900.h> |
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33 | |
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34 | /* |
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35 | * We expect to be able to read a complete packet into an mbuf. |
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36 | */ |
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37 | |
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38 | #if (MCLBYTES < 1520) |
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39 | #error "CS8900 Driver must have MCLBYTES >= 1520" |
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40 | #endif |
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41 | |
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42 | /* |
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43 | * Task event usage. |
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44 | */ |
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45 | |
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46 | #define CS8900_RX_OK_EVENT RTEMS_EVENT_1 |
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47 | #define CS8900_TX_START_EVENT RTEMS_EVENT_1 |
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48 | #define CS8900_TX_OK_EVENT RTEMS_EVENT_2 |
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49 | #define CS8900_TX_WAIT_EVENT RTEMS_EVENT_3 |
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50 | |
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51 | /* |
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52 | * IO Packet Page inteface. |
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53 | */ |
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54 | |
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55 | static inline unsigned short |
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56 | io_pp_get_reg_16 (cs8900_device *cs, unsigned short reg) |
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57 | { |
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58 | rtems_interrupt_level level; |
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59 | unsigned short data; |
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60 | rtems_interrupt_disable (level); |
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61 | cs8900_io_set_reg (cs, CS8900_IO_PACKET_PAGE_PTR, |
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62 | 0x3000 | CS8900_PPP_AUTO_INCREMENT | reg); |
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63 | data = cs8900_io_get_reg (cs, CS8900_IO_PP_DATA_PORT0); |
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64 | rtems_interrupt_enable (level); |
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65 | return data; |
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66 | } |
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67 | |
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68 | static inline uint32_t |
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69 | io_pp_get_reg_32 (cs8900_device *cs, uint16_t reg) |
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70 | { |
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71 | rtems_interrupt_level level; |
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72 | uint32_t data; |
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73 | rtems_interrupt_disable (level); |
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74 | cs8900_io_set_reg (cs, CS8900_IO_PACKET_PAGE_PTR, |
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75 | 0x3000 | CS8900_PPP_AUTO_INCREMENT | reg); |
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76 | data = cs8900_io_get_reg (cs, CS8900_IO_PP_DATA_PORT0); |
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77 | data <<= 16; |
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78 | data |= cs8900_io_get_reg (cs, CS8900_IO_PP_DATA_PORT1); |
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79 | rtems_interrupt_enable (level); |
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80 | return data; |
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81 | } |
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82 | |
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83 | static inline void |
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84 | io_pp_set_reg_16 (cs8900_device *cs, unsigned short reg, unsigned short data) |
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85 | { |
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86 | rtems_interrupt_level level; |
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87 | rtems_interrupt_disable (level); |
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88 | cs8900_io_set_reg (cs, CS8900_IO_PACKET_PAGE_PTR, |
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89 | 0x3000 | CS8900_PPP_AUTO_INCREMENT | reg); |
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90 | cs8900_io_set_reg (cs, CS8900_IO_PP_DATA_PORT0, data); |
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91 | rtems_interrupt_enable (level); |
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92 | } |
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93 | |
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94 | static inline void |
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95 | io_pp_set_reg_32 (cs8900_device *cs, unsigned short reg, unsigned long data) |
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96 | { |
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97 | cs8900_io_set_reg (cs, CS8900_IO_PACKET_PAGE_PTR, |
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98 | 0x3000 | CS8900_PPP_AUTO_INCREMENT | reg); |
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99 | cs8900_io_set_reg (cs, CS8900_IO_PP_DATA_PORT0, data >> 16); |
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100 | cs8900_io_set_reg (cs, CS8900_IO_PP_DATA_PORT1, data); |
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101 | } |
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102 | |
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103 | static inline void |
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104 | io_pp_bit_set_reg_16 (cs8900_device *cs, unsigned short reg, unsigned short mask) |
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105 | { |
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106 | rtems_interrupt_level level; |
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107 | rtems_interrupt_disable (level); |
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108 | io_pp_set_reg_16 (cs, reg, io_pp_get_reg_16 (cs, reg) | mask); |
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109 | rtems_interrupt_enable (level); |
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110 | } |
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111 | |
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112 | static inline void |
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113 | io_pp_bit_clear_reg_16 (cs8900_device *cs, unsigned short reg, unsigned short mask) |
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114 | { |
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115 | rtems_interrupt_level level; |
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116 | rtems_interrupt_disable (level); |
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117 | io_pp_set_reg_16 (cs, reg, io_pp_get_reg_16 (cs, reg) & ~mask); |
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118 | rtems_interrupt_enable (level); |
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119 | } |
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120 | |
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121 | /* |
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122 | * Memory Mapped Packet Page interface. |
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123 | * |
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124 | * If the BSP does not configure mem_base use the I/O register accesses. |
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125 | */ |
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126 | |
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127 | static inline unsigned short |
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128 | mem_pp_get_reg (cs8900_device *cs, unsigned short reg) |
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129 | { |
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130 | if (!cs->mem_base) |
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131 | return io_pp_get_reg_16 (cs, reg); |
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132 | return cs8900_mem_get_reg (cs, reg); |
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133 | } |
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134 | |
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135 | static inline void |
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136 | mem_pp_set_reg (cs8900_device *cs, unsigned short reg, unsigned short data) |
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137 | { |
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138 | if (!cs->mem_base) |
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139 | io_pp_set_reg_16 (cs, reg, data); |
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140 | else |
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141 | cs8900_mem_set_reg (cs, reg, data); |
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142 | } |
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143 | |
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144 | static inline void |
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145 | mem_pp_bit_set_reg (cs8900_device *cs, unsigned short reg, unsigned short mask) |
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146 | { |
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147 | if (!cs->mem_base) |
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148 | io_pp_bit_set_reg_16 (cs, reg, mask); |
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149 | else |
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150 | { |
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151 | rtems_interrupt_level level; |
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152 | rtems_interrupt_disable (level); |
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153 | mem_pp_set_reg (cs, reg, mem_pp_get_reg (cs, reg) | mask); |
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154 | rtems_interrupt_enable (level); |
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155 | } |
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156 | } |
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157 | |
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158 | static inline void |
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159 | mem_pp_bit_clear_reg (cs8900_device *cs, unsigned short reg, unsigned short mask) |
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160 | { |
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161 | if (!cs->mem_base) |
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162 | io_pp_bit_clear_reg_16 (cs, reg, mask); |
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163 | else |
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164 | { |
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165 | rtems_interrupt_level level; |
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166 | rtems_interrupt_disable (level); |
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167 | mem_pp_set_reg (cs, reg, mem_pp_get_reg (cs, reg) & ~mask); |
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168 | rtems_interrupt_enable (level); |
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169 | } |
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170 | } |
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171 | |
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172 | /* |
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173 | * Trace defines and control structures. |
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174 | */ |
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175 | |
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176 | #define CS8900_T_INT (0) |
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177 | #define CS8900_T_RX_OK (1) |
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178 | #define CS8900_T_RX_DROPPED (2) |
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179 | #define CS8900_T_NO_MBUF (3) |
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180 | #define CS8900_T_NO_CLUSTERS (4) |
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181 | #define CS8900_T_RX_BEGIN (5) |
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182 | #define CS8900_T_RX_END (6) |
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183 | |
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184 | #if CS8900_TRACE |
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185 | |
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186 | static const char *cs8900_trace_labels[] = |
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187 | { |
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188 | "int", |
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189 | "rx ok", |
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190 | "rx dropped", |
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191 | "no mbuf", |
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192 | "no clusters", |
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193 | "rx begin", |
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194 | "rx end" |
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195 | }; |
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196 | |
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197 | /* |
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198 | * Assumes a micro-second timer such as the Coldfire. |
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199 | */ |
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200 | |
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201 | uint32_t rtems_read_timer (); |
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202 | |
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203 | static inline void |
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204 | cs8900_trace (cs8900_device *cs, unsigned short key, unsigned long var) |
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205 | { |
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206 | rtems_interrupt_level level; |
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207 | |
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208 | rtems_interrupt_disable (level); |
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209 | |
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210 | if (cs->trace_in < CS8900_TRACE_SIZE) |
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211 | { |
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212 | cs->trace_key[cs->trace_in] = key; |
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213 | cs->trace_var[cs->trace_in] = var; |
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214 | cs->trace_time[cs->trace_in] = rtems_read_timer (); |
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215 | cs->trace_in++; |
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216 | } |
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217 | |
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218 | rtems_interrupt_enable (level); |
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219 | } |
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220 | #else |
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221 | #define cs8900_trace(c, k, v) |
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222 | #endif |
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223 | |
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224 | void cs8900_get_mac_addr (cs8900_device *cs, unsigned char *mac_address) |
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225 | { |
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226 | unsigned short ma; |
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227 | |
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228 | /* |
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229 | * Only ever use IO calls for this function as it can be |
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230 | * called before memory mode has been enabled. |
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231 | */ |
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232 | |
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233 | ma = io_pp_get_reg_16 (cs, CS8900_PP_IA); |
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234 | mac_address[0] = ma >> 8; |
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235 | mac_address[1] = ma; |
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236 | |
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237 | ma = io_pp_get_reg_16 (cs, CS8900_PP_IA + 2); |
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238 | mac_address[2] = ma >> 8; |
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239 | mac_address[3] = ma; |
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240 | |
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241 | ma = io_pp_get_reg_16 (cs, CS8900_PP_IA + 4); |
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242 | mac_address[4] = ma >> 8; |
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243 | mac_address[5] = ma; |
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244 | } |
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245 | |
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246 | /* |
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247 | * Bring the chip online. |
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248 | */ |
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249 | |
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250 | static void |
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251 | cs8900_hardware_init (cs8900_device *cs) |
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252 | { |
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253 | unsigned long prod_id; |
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254 | unsigned short status; |
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255 | |
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256 | /* |
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257 | * Do nothing while the device is calibrating and checking the EEPROM. |
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258 | * We must wait 20msecs. |
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259 | */ |
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260 | |
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261 | io_pp_bit_set_reg_16 (cs, CS8900_PP_SelfCTL, CS8900_SELF_CTRL_RESET); |
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262 | |
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263 | rtems_task_wake_after (RTEMS_MILLISECONDS_TO_TICKS (20)); |
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264 | |
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265 | status = io_pp_get_reg_16 (cs, CS8900_PP_SelfST); |
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266 | if (status == 0) { |
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267 | printf("Reading status register again\n"); |
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268 | status = io_pp_get_reg_16 (cs, CS8900_PP_SelfST); |
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269 | } |
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270 | |
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271 | if (((status & CS8900_SELF_STATUS_INITD) == 0) || |
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272 | ((status & CS8900_SELF_STATUS_INITD) && |
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273 | (status & CS8900_SELF_STATUS_EEPROM_PRESENT) && |
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274 | (status & CS8900_SELF_STATUS_SIBUST))) |
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275 | { |
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276 | printf ("CS8900: %s. Initialisation aborted.\n", |
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277 | (status & CS8900_SELF_STATUS_INITD) ? |
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278 | "EEPROM read/write failed to complete" : |
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279 | "Failed to complete to reset"); |
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280 | return; |
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281 | } |
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282 | |
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283 | /* Set the RX queue size if not set by the BSP. */ |
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284 | |
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285 | if (cs->rx_queue_size == 0) |
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286 | cs->rx_queue_size = 10; |
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287 | |
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288 | /* Probe the device for its ID */ |
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289 | |
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290 | prod_id = io_pp_get_reg_32 (cs, CS8900_PP_PROD_ID); |
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291 | |
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292 | if ((prod_id >> 16) != CS8900_ESIA_ID) |
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293 | { |
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294 | printf ("CS8900: Invalid EISA ID, read product code 0x%08lx\n", prod_id); |
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295 | return; |
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296 | } |
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297 | |
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298 | if ((prod_id & 0x000000ff) != 0) |
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299 | { |
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300 | printf ("CS8900: Unsupported product id, read product code 0x%08lx\n", |
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301 | prod_id); |
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302 | return; |
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303 | } |
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304 | |
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305 | printf ("CS8900 Rev %ld, %s, %s.\n", |
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306 | (prod_id >> 8) & 0x1f, |
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307 | status & CS8900_SELF_STATUS_3_3_V ? "3.3V" : "5.0V", |
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308 | status & CS8900_SELF_STATUS_EEPROM_PRESENT ? |
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309 | "EEPROM present" : "no EEPROM"); |
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310 | |
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311 | /* |
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312 | * Switch to memory base accesses as they are faster. No indirect access. |
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313 | */ |
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314 | |
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315 | if (cs->mem_base) |
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316 | { |
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317 | io_pp_set_reg_16 (cs, CS8900_PP_MEM_BASE, cs->mem_base); |
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318 | io_pp_set_reg_16 (cs, CS8900_PP_MEM_BASE + 2, (cs->mem_base >> 16) & 0xf); |
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319 | |
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320 | io_pp_set_reg_16 (cs, |
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321 | CS8900_PP_BusCTL, |
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322 | CS8900_BUS_CTRL_RESET_RX_DMA | |
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323 | CS8900_BUS_CTRL_USE_SA | |
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324 | CS8900_BUS_CTRL_MEMORY_ENABLE); |
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325 | io_pp_set_reg_16 (cs, |
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326 | CS8900_PP_BusCTL, |
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327 | CS8900_BUS_CTRL_USE_SA | |
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328 | CS8900_BUS_CTRL_MEMORY_ENABLE); |
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329 | } |
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330 | |
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331 | /* |
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332 | * We are now in memory mapped mode. |
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333 | */ |
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334 | |
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335 | /* |
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336 | * Program the Line Control register with the mode we want. |
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337 | * |
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338 | * No auto detect support at the moment. Only 10BaseT. |
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339 | */ |
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340 | |
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341 | mem_pp_set_reg (cs, CS8900_PP_LineCFG, CS8900_LINE_CTRL_10BASET); |
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342 | |
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343 | /* |
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344 | * Ask the user for the MAC address, the program into the device. |
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345 | */ |
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346 | |
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347 | #define MACO(o) cs->arpcom.ac_enaddr[o] |
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348 | |
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349 | mem_pp_set_reg (cs, CS8900_PP_IA, |
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350 | (((unsigned int) MACO (1)) << 8) | |
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351 | ((unsigned int) MACO (0))); |
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352 | mem_pp_set_reg (cs, CS8900_PP_IA + 2, |
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353 | (((unsigned int) MACO (3)) << 8) | |
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354 | ((unsigned int) MACO (2))); |
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355 | mem_pp_set_reg (cs, CS8900_PP_IA + 4, |
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356 | (((unsigned int) MACO (5)) << 8) | |
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357 | ((unsigned int) MACO (4))); |
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358 | |
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359 | /* |
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360 | * Set the Buffer configuration. |
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361 | */ |
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362 | |
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363 | mem_pp_set_reg (cs, CS8900_PP_BufCFG, |
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364 | CS8900_BUFFER_CONFIG_RDY_FOR_TX | |
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365 | CS8900_BUFFER_CONFIG_TX_UNDERRUN | |
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366 | CS8900_BUFFER_CONFIG_TX_COL_OVF | |
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367 | CS8900_BUFFER_CONFIG_RX_MISSED_OVF); |
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368 | |
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369 | /* |
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370 | * Set the Receiver configuration. |
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371 | */ |
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372 | |
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373 | mem_pp_set_reg (cs, CS8900_PP_RxCFG, |
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374 | CS8900_RX_CONFIG_RX_OK | |
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375 | CS8900_RX_CONFIG_CRC_ERROR | |
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376 | CS8900_RX_CONFIG_RUNT| |
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377 | CS8900_RX_CONFIG_EXTRA_DATA); |
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378 | |
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379 | /* |
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380 | * Set the Receiver control. |
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381 | */ |
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382 | |
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383 | mem_pp_set_reg (cs, CS8900_PP_RxCTL, |
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384 | CS8900_RX_CTRL_RX_OK | |
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385 | CS8900_RX_CTRL_MULTICAST | |
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386 | CS8900_RX_CTRL_INDIVIDUAL | |
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387 | CS8900_RX_CTRL_BROADCAST); |
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388 | |
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389 | /* |
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390 | * Set the Transmitter configuration. |
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391 | */ |
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392 | |
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393 | mem_pp_set_reg (cs, CS8900_PP_TxCFG, |
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394 | CS8900_TX_CONFIG_TX_OK | |
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395 | CS8900_TX_CONFIG_OUT_OF_WINDOW | |
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396 | CS8900_TX_CONFIG_JABBER | |
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397 | CS8900_TX_CONFIG_16_COLLISION); |
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398 | |
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399 | /* |
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400 | * Attach the interrupt handler. |
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401 | */ |
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402 | |
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403 | cs8900_attach_interrupt (cs); |
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404 | |
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405 | /* |
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406 | * Program the interrupt level we require then enable interrupts. |
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407 | * |
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408 | * Note, this will need to change to support other levels. |
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409 | */ |
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410 | |
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411 | mem_pp_set_reg (cs, CS8900_PP_INT, cs->irq_level & 3); |
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412 | |
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413 | mem_pp_bit_set_reg (cs, CS8900_PP_BusCTL, |
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414 | CS8900_BUS_CTRL_ENABLE_INT); |
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415 | } |
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416 | |
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417 | rtems_isr |
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418 | cs8900_interrupt (rtems_vector_number v, void *csp) |
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419 | { |
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420 | cs8900_device *cs = csp; |
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421 | unsigned short isq = 0; |
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422 | struct mbuf *m; |
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423 | unsigned char *p; |
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424 | |
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425 | ++cs->eth_stats.interrupts; |
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426 | |
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427 | while (1) |
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428 | { |
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429 | isq = mem_pp_get_reg (cs, CS8900_PP_ISQ); |
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430 | |
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431 | cs8900_trace (cs, CS8900_T_INT, isq); |
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432 | |
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433 | /* |
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434 | * No more interrupts to service. |
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435 | */ |
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436 | |
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437 | if (isq == 0) |
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438 | return; |
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439 | |
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440 | switch (isq & 0x1f) |
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441 | { |
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442 | case 0x04: |
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443 | |
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444 | /* |
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445 | * RxEvent. |
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446 | */ |
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447 | |
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448 | ++cs->eth_stats.rx_interrupts; |
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449 | |
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450 | if (isq & CS8900_RX_EVENT_RX_OK) |
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451 | { |
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452 | m = cs->rx_ready_head; |
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453 | if (m) |
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454 | { |
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455 | cs->rx_ready_head = m->m_nextpkt; |
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456 | if (cs->rx_ready_head == 0) |
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457 | cs->rx_ready_tail = 0; |
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458 | m->m_nextpkt = 0; |
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459 | cs->rx_ready_len--; |
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460 | |
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461 | p = mtod (m, unsigned char *); |
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462 | |
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463 | m->m_pkthdr.len = cs8900_get_data_block (cs, p); |
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464 | |
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465 | if (cs->rx_loaded_tail == 0) |
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466 | cs->rx_loaded_head = m; |
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467 | else |
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468 | cs->rx_loaded_tail->m_nextpkt = m; |
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469 | cs->rx_loaded_tail = m; |
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470 | cs->rx_loaded_len++; |
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471 | |
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472 | if (cs->rx_loaded_len == 1) |
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473 | { |
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474 | cs8900_trace (cs, CS8900_T_RX_OK, cs->rx_loaded_len); |
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475 | rtems_bsdnet_event_send (cs->rx_task, CS8900_RX_OK_EVENT); |
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476 | } |
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477 | } |
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478 | else |
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479 | { |
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480 | ++cs->eth_stats.rx_dropped; |
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481 | |
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482 | cs8900_trace (cs, CS8900_T_RX_DROPPED, cs->rx_loaded_len); |
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483 | |
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484 | if (cs->rx_loaded_len == 0) |
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485 | rtems_bsdnet_event_send (cs->rx_task, CS8900_RX_OK_EVENT); |
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486 | } |
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487 | } |
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488 | else |
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489 | { |
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490 | if (isq & CS8900_RX_EVENT_CRC_ERROR) |
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491 | ++cs->eth_stats.rx_crc_errors; |
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492 | |
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493 | if (isq & CS8900_RX_EVENT_RUNT) |
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494 | ++cs->eth_stats.rx_runt_errors; |
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495 | |
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496 | if (isq & CS8900_RX_EVENT_EXTRA_DATA) |
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497 | ++cs->eth_stats.rx_oversize_errors; |
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498 | } |
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499 | break; |
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500 | |
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501 | case 0x08: |
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502 | |
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503 | /* |
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504 | * TxEvent. |
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505 | */ |
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506 | |
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507 | ++cs->eth_stats.tx_interrupts; |
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508 | |
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509 | if (cs->tx_active) |
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510 | { |
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511 | if (isq & CS8900_TX_EVENT_TX_OK) |
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512 | ++cs->eth_stats.tx_ok; |
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513 | |
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514 | cs->tx_active = 0; |
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515 | |
---|
516 | rtems_bsdnet_event_send (cs->tx_task, CS8900_TX_OK_EVENT); |
---|
517 | } |
---|
518 | break; |
---|
519 | |
---|
520 | case 0x0c: |
---|
521 | |
---|
522 | /* |
---|
523 | * BufEvent. |
---|
524 | */ |
---|
525 | |
---|
526 | if (isq & CS8900_BUFFER_EVENT_RDY_FOR_TX) |
---|
527 | { |
---|
528 | if (cs->tx_active) |
---|
529 | { |
---|
530 | ++cs->eth_stats.tx_rdy4tx; |
---|
531 | rtems_bsdnet_event_send (cs->tx_task, CS8900_TX_WAIT_EVENT); |
---|
532 | } |
---|
533 | } |
---|
534 | else if (isq & CS8900_BUFFER_EVENT_TX_UNDERRUN) |
---|
535 | { |
---|
536 | ++cs->eth_stats.tx_underrun_errors; |
---|
537 | if (cs->tx_active) |
---|
538 | rtems_bsdnet_event_send (cs->tx_task, CS8900_TX_OK_EVENT); |
---|
539 | } |
---|
540 | else if (isq & CS8900_BUFFER_EVENT_SW_INT) |
---|
541 | { |
---|
542 | ++cs->eth_stats.int_swint_res; |
---|
543 | } |
---|
544 | break; |
---|
545 | |
---|
546 | case 0x10: |
---|
547 | |
---|
548 | /* |
---|
549 | * RxMiss. |
---|
550 | */ |
---|
551 | |
---|
552 | cs->eth_stats.rx_missed_errors += |
---|
553 | mem_pp_get_reg (cs, CS8900_PP_RxMISS) >> 6; |
---|
554 | break; |
---|
555 | |
---|
556 | case 0x12: |
---|
557 | |
---|
558 | /* |
---|
559 | * TxCol. |
---|
560 | */ |
---|
561 | |
---|
562 | cs->eth_stats.tx_collisions += |
---|
563 | mem_pp_get_reg (cs, CS8900_PP_TxCol) >> 6; |
---|
564 | break; |
---|
565 | |
---|
566 | default: |
---|
567 | break; |
---|
568 | } |
---|
569 | } |
---|
570 | |
---|
571 | } |
---|
572 | |
---|
573 | int |
---|
574 | cs8900_link_active (cs8900_device *cs) |
---|
575 | { |
---|
576 | return ((mem_pp_get_reg (cs, CS8900_PP_LineST) & CS8900_LINE_STATUS_LINK_OK) ? |
---|
577 | 1 : 0); |
---|
578 | } |
---|
579 | |
---|
580 | static inline void |
---|
581 | cs8900_rx_refill_queue (cs8900_device *cs) |
---|
582 | { |
---|
583 | struct ifnet *ifp = &cs->arpcom.ac_if; |
---|
584 | struct mbuf *m; |
---|
585 | rtems_interrupt_level level; |
---|
586 | |
---|
587 | /* |
---|
588 | * Hold a single queue of mbuf's at the interface. This |
---|
589 | * will lower the latency of the driver. |
---|
590 | */ |
---|
591 | |
---|
592 | while (cs->rx_ready_len < cs->rx_queue_size) |
---|
593 | { |
---|
594 | MGETHDR (m, M_DONTWAIT, MT_DATA); |
---|
595 | |
---|
596 | if (!m) |
---|
597 | { |
---|
598 | ++cs->eth_stats.rx_no_mbufs; |
---|
599 | cs8900_trace (cs, CS8900_T_NO_MBUF, cs->eth_stats.rx_no_mbufs); |
---|
600 | return; |
---|
601 | } |
---|
602 | |
---|
603 | MCLGET (m, M_DONTWAIT); |
---|
604 | |
---|
605 | if (!m->m_ext.ext_buf) |
---|
606 | { |
---|
607 | ++cs->eth_stats.rx_no_clusters; |
---|
608 | cs8900_trace (cs, CS8900_T_NO_CLUSTERS, cs->eth_stats.rx_no_clusters); |
---|
609 | m_free (m); |
---|
610 | return; |
---|
611 | } |
---|
612 | m->m_pkthdr.rcvif = ifp; |
---|
613 | m->m_nextpkt = 0; |
---|
614 | |
---|
615 | rtems_interrupt_disable (level); |
---|
616 | |
---|
617 | if (cs->rx_ready_tail == 0) |
---|
618 | cs->rx_ready_head = m; |
---|
619 | else |
---|
620 | cs->rx_ready_tail->m_nextpkt = m; |
---|
621 | cs->rx_ready_tail = m; |
---|
622 | cs->rx_ready_len++; |
---|
623 | |
---|
624 | rtems_interrupt_enable (level); |
---|
625 | } |
---|
626 | } |
---|
627 | |
---|
628 | static void |
---|
629 | cs8900_rx_task (void *arg) |
---|
630 | { |
---|
631 | cs8900_device *cs = arg; |
---|
632 | struct ifnet *ifp = &cs->arpcom.ac_if; |
---|
633 | rtems_event_set events; |
---|
634 | struct mbuf *m; |
---|
635 | struct ether_header *eh; |
---|
636 | rtems_status_code sc; |
---|
637 | rtems_interrupt_level level; |
---|
638 | |
---|
639 | /* |
---|
640 | * Turn the receiver and transmitter on. |
---|
641 | */ |
---|
642 | |
---|
643 | mem_pp_bit_set_reg (cs, CS8900_PP_LineCFG, |
---|
644 | CS8900_LINE_CTRL_RX_ON | |
---|
645 | CS8900_LINE_CTRL_TX_ON); |
---|
646 | |
---|
647 | /* |
---|
648 | * Start the software interrupt watchdog. |
---|
649 | */ |
---|
650 | |
---|
651 | mem_pp_bit_set_reg (cs, CS8900_PP_BufCFG, |
---|
652 | CS8900_BUFFER_CONFIG_SW_INT); |
---|
653 | ++cs->eth_stats.int_swint_req; |
---|
654 | |
---|
655 | /* |
---|
656 | * Loop reading packets. |
---|
657 | */ |
---|
658 | |
---|
659 | while (1) |
---|
660 | { |
---|
661 | cs8900_rx_refill_queue (cs); |
---|
662 | |
---|
663 | sc = rtems_bsdnet_event_receive (CS8900_RX_OK_EVENT, |
---|
664 | RTEMS_WAIT | RTEMS_EVENT_ANY, |
---|
665 | RTEMS_MILLISECONDS_TO_TICKS (250), |
---|
666 | &events); |
---|
667 | |
---|
668 | cs8900_rx_refill_queue (cs); |
---|
669 | |
---|
670 | if (sc == RTEMS_TIMEOUT) |
---|
671 | { |
---|
672 | /* |
---|
673 | * We need to check the interrupt hardware in the cs8900a |
---|
674 | * has not locked up. It seems this occurs if the ISQ |
---|
675 | * queue fills up. |
---|
676 | * To test we generate a software interrupt and watch |
---|
677 | * a counter go up. If the counter does not go for 2 |
---|
678 | * software interrupts requests we flush the ISQ queue. |
---|
679 | */ |
---|
680 | |
---|
681 | if ((cs->eth_stats.int_swint_req - cs->eth_stats.int_swint_res) > 1) |
---|
682 | { |
---|
683 | printf ("cs8900: int lockup, isq flush\n"); |
---|
684 | |
---|
685 | mem_pp_bit_clear_reg (cs, CS8900_PP_BusCTL, |
---|
686 | CS8900_BUS_CTRL_ENABLE_INT); |
---|
687 | |
---|
688 | while (mem_pp_get_reg (cs, CS8900_PP_ISQ) != 0); |
---|
689 | |
---|
690 | cs->eth_stats.int_swint_req = cs->eth_stats.int_swint_res = 0; |
---|
691 | ++cs->eth_stats.int_lockup; |
---|
692 | |
---|
693 | mem_pp_bit_set_reg (cs, CS8900_PP_BusCTL, |
---|
694 | CS8900_BUS_CTRL_ENABLE_INT); |
---|
695 | } |
---|
696 | |
---|
697 | mem_pp_bit_set_reg (cs, CS8900_PP_BufCFG, |
---|
698 | CS8900_BUFFER_CONFIG_SW_INT); |
---|
699 | ++cs->eth_stats.int_swint_req; |
---|
700 | } |
---|
701 | |
---|
702 | cs8900_trace (cs, CS8900_T_RX_BEGIN, cs->rx_loaded_len); |
---|
703 | |
---|
704 | while (cs->rx_loaded_len) |
---|
705 | { |
---|
706 | rtems_interrupt_disable (level); |
---|
707 | |
---|
708 | m = cs->rx_loaded_head; |
---|
709 | if (m) |
---|
710 | { |
---|
711 | cs->rx_loaded_head = m->m_nextpkt; |
---|
712 | if (cs->rx_loaded_head == 0) |
---|
713 | cs->rx_loaded_tail = 0; |
---|
714 | m->m_nextpkt = 0; |
---|
715 | cs->rx_loaded_len--; |
---|
716 | |
---|
717 | rtems_interrupt_enable (level); |
---|
718 | |
---|
719 | m->m_pkthdr.rcvif = ifp; |
---|
720 | |
---|
721 | cs->eth_stats.rx_bytes += m->m_pkthdr.len; |
---|
722 | |
---|
723 | m->m_len = m->m_pkthdr.len = m->m_pkthdr.len - sizeof (struct ether_header); |
---|
724 | |
---|
725 | eh = mtod (m, struct ether_header *); |
---|
726 | m->m_data += sizeof (struct ether_header); |
---|
727 | |
---|
728 | ++cs->eth_stats.rx_packets; |
---|
729 | |
---|
730 | ether_input (ifp, eh, m); |
---|
731 | } |
---|
732 | else |
---|
733 | { |
---|
734 | rtems_interrupt_enable (level); |
---|
735 | } |
---|
736 | } |
---|
737 | cs8900_trace (cs, CS8900_T_RX_END, cs->rx_loaded_len); |
---|
738 | } |
---|
739 | } |
---|
740 | |
---|
741 | static void |
---|
742 | cs8900_tx_task (void *arg) |
---|
743 | { |
---|
744 | cs8900_device *cs = arg; |
---|
745 | struct ifnet *ifp = &cs->arpcom.ac_if; |
---|
746 | rtems_event_set events; |
---|
747 | struct mbuf *m; |
---|
748 | rtems_status_code sc; |
---|
749 | |
---|
750 | /* |
---|
751 | * Wait for the link to come up. |
---|
752 | */ |
---|
753 | |
---|
754 | rtems_task_wake_after (RTEMS_MILLISECONDS_TO_TICKS (750)); |
---|
755 | |
---|
756 | /* |
---|
757 | * Loop processing the tx queue. |
---|
758 | */ |
---|
759 | |
---|
760 | while (1) |
---|
761 | { |
---|
762 | /* |
---|
763 | * Fetch the mbuf list from the interface's queue. |
---|
764 | */ |
---|
765 | |
---|
766 | IF_DEQUEUE (&ifp->if_snd, m); |
---|
767 | |
---|
768 | /* |
---|
769 | * If something actually is present send it. |
---|
770 | */ |
---|
771 | |
---|
772 | if (!m) |
---|
773 | { |
---|
774 | ifp->if_flags &= ~IFF_OACTIVE; |
---|
775 | |
---|
776 | rtems_bsdnet_event_receive (CS8900_TX_START_EVENT, |
---|
777 | RTEMS_WAIT | RTEMS_EVENT_ANY, |
---|
778 | RTEMS_NO_TIMEOUT, |
---|
779 | &events); |
---|
780 | } |
---|
781 | else |
---|
782 | { |
---|
783 | if (cs8900_link_active (cs)) |
---|
784 | { |
---|
785 | int resending; |
---|
786 | |
---|
787 | do |
---|
788 | { |
---|
789 | unsigned short buf_status; |
---|
790 | |
---|
791 | resending = 0; |
---|
792 | |
---|
793 | cs->tx_active = 1; |
---|
794 | |
---|
795 | mem_pp_set_reg (cs, CS8900_PP_TxCMD, |
---|
796 | CS8900_TX_CMD_STATUS_TX_START_ENTIRE | |
---|
797 | CS8900_TX_CMD_STATUS_FORCE); |
---|
798 | mem_pp_set_reg (cs, CS8900_PP_TxLength, m->m_pkthdr.len); |
---|
799 | |
---|
800 | buf_status = mem_pp_get_reg (cs, CS8900_PP_BusST); |
---|
801 | |
---|
802 | /* |
---|
803 | * If the bid for memory in the device fails trash the |
---|
804 | * transmit and try again next time. |
---|
805 | */ |
---|
806 | |
---|
807 | if (buf_status & CS8900_BUS_STATUS_TX_BID_ERROR) |
---|
808 | ++cs->eth_stats.tx_bid_errors; |
---|
809 | else |
---|
810 | { |
---|
811 | /* |
---|
812 | * If the buffer is not read enable the interrupt and then wait. |
---|
813 | */ |
---|
814 | |
---|
815 | if ((buf_status & CS8900_BUS_STATUS_RDY_FOR_TX_NOW) == 0) |
---|
816 | { |
---|
817 | cs->eth_stats.tx_wait_for_rdy4tx++; |
---|
818 | sc = rtems_bsdnet_event_receive (CS8900_TX_WAIT_EVENT, |
---|
819 | RTEMS_WAIT | RTEMS_EVENT_ANY, |
---|
820 | RTEMS_MILLISECONDS_TO_TICKS (750), |
---|
821 | &events); |
---|
822 | if (sc == RTEMS_TIMEOUT) |
---|
823 | { |
---|
824 | /* |
---|
825 | * For some reason the wait request has been dropped, |
---|
826 | * so lets resend from the start. |
---|
827 | */ |
---|
828 | |
---|
829 | printf ("tx resend\n"); |
---|
830 | ++cs->eth_stats.tx_resends; |
---|
831 | resending = 1; |
---|
832 | } |
---|
833 | } |
---|
834 | |
---|
835 | if (!resending) |
---|
836 | { |
---|
837 | cs8900_tx_load (cs, m); |
---|
838 | cs->eth_stats.tx_packets++; |
---|
839 | cs->eth_stats.tx_bytes += m->m_pkthdr.len; |
---|
840 | } |
---|
841 | } |
---|
842 | } |
---|
843 | while (resending); |
---|
844 | |
---|
845 | m_freem (m); |
---|
846 | |
---|
847 | do |
---|
848 | { |
---|
849 | rtems_bsdnet_event_receive (CS8900_TX_OK_EVENT, |
---|
850 | RTEMS_WAIT | RTEMS_EVENT_ANY, |
---|
851 | RTEMS_NO_TIMEOUT, |
---|
852 | &events); |
---|
853 | } |
---|
854 | while (cs->tx_active); |
---|
855 | } |
---|
856 | else |
---|
857 | { |
---|
858 | ++cs->eth_stats.tx_dropped; |
---|
859 | m_freem (m); |
---|
860 | } |
---|
861 | } |
---|
862 | } |
---|
863 | } |
---|
864 | |
---|
865 | static void |
---|
866 | cs8900_start (struct ifnet *ifp) |
---|
867 | { |
---|
868 | cs8900_device *cs = ifp->if_softc; |
---|
869 | |
---|
870 | /* |
---|
871 | * Tell the transmit daemon to wake up and send a packet. |
---|
872 | */ |
---|
873 | |
---|
874 | ifp->if_flags |= IFF_OACTIVE; |
---|
875 | |
---|
876 | rtems_bsdnet_event_send (cs->tx_task, CS8900_TX_START_EVENT); |
---|
877 | } |
---|
878 | |
---|
879 | static void |
---|
880 | cs8900_stop (cs8900_device *cs) |
---|
881 | { |
---|
882 | mem_pp_bit_clear_reg (cs, CS8900_PP_LineCFG, |
---|
883 | CS8900_LINE_CTRL_RX_ON | |
---|
884 | CS8900_LINE_CTRL_TX_ON); |
---|
885 | |
---|
886 | mem_pp_bit_clear_reg (cs, CS8900_PP_BusCTL, |
---|
887 | CS8900_BUS_CTRL_ENABLE_INT); |
---|
888 | } |
---|
889 | |
---|
890 | static const char *eth_statistics_labels[] = |
---|
891 | { |
---|
892 | "rx packets", |
---|
893 | "tx packets", |
---|
894 | "rx bytes", |
---|
895 | "tx bytes", |
---|
896 | "rx interrupts", |
---|
897 | "tx interrupts", |
---|
898 | "rx dropped", |
---|
899 | "rx no mbuf", |
---|
900 | "rx no custers", |
---|
901 | "rx oversize errors", |
---|
902 | "rx crc errors", |
---|
903 | "rx runt errors", |
---|
904 | "rx missed errors", |
---|
905 | "tx ok", |
---|
906 | "tx collisions", |
---|
907 | "tx bid errors", |
---|
908 | "tx wait for rdy4tx", |
---|
909 | "tx rdy4tx", |
---|
910 | "tx underrun errors", |
---|
911 | "tx dropped", |
---|
912 | "tx resends", |
---|
913 | "int swint req", |
---|
914 | "int swint res", |
---|
915 | "int lockup", |
---|
916 | "interrupts" |
---|
917 | }; |
---|
918 | |
---|
919 | static void |
---|
920 | cs8900_stats (cs8900_device *cs) |
---|
921 | { |
---|
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 (cs, CS8900_PP_RxMISS) >> 6; |
---|
929 | |
---|
930 | cs->eth_stats.tx_collisions += |
---|
931 | mem_pp_get_reg (cs, 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 | struct ifnet *ifp = &cs->arpcom.ac_if; |
---|
1037 | |
---|
1038 | if (cs->rx_task == 0) |
---|
1039 | { |
---|
1040 | |
---|
1041 | /* |
---|
1042 | * Set up the hardware. |
---|
1043 | */ |
---|
1044 | |
---|
1045 | cs8900_hardware_init (cs); |
---|
1046 | |
---|
1047 | /* |
---|
1048 | * Start driver task. We have only one task. |
---|
1049 | */ |
---|
1050 | |
---|
1051 | cs->rx_task = rtems_bsdnet_newproc ("CSr0", 4096, cs8900_rx_task, cs); |
---|
1052 | cs->tx_task = rtems_bsdnet_newproc ("CSt0", 4096, cs8900_tx_task, cs); |
---|
1053 | } |
---|
1054 | |
---|
1055 | #ifdef todo |
---|
1056 | /* |
---|
1057 | * Set flags appropriately |
---|
1058 | */ |
---|
1059 | if (ifp->if_flags & IFF_PROMISC) |
---|
1060 | else |
---|
1061 | #endif |
---|
1062 | |
---|
1063 | /* |
---|
1064 | * Tell the world that we're running. |
---|
1065 | */ |
---|
1066 | |
---|
1067 | ifp->if_flags |= IFF_RUNNING; |
---|
1068 | |
---|
1069 | /* |
---|
1070 | * Set the Line Control to bring the receive and transmitter online. |
---|
1071 | */ |
---|
1072 | |
---|
1073 | mem_pp_bit_set_reg (cs, CS8900_PP_LineCFG, |
---|
1074 | CS8900_LINE_CTRL_RX_ON | |
---|
1075 | CS8900_LINE_CTRL_TX_ON); |
---|
1076 | |
---|
1077 | mem_pp_bit_set_reg (cs, CS8900_PP_BusCTL, |
---|
1078 | CS8900_BUS_CTRL_ENABLE_INT); |
---|
1079 | } |
---|
1080 | |
---|
1081 | static int |
---|
1082 | cs8900_ioctl (struct ifnet *ifp, ioctl_command_t cmd, caddr_t data) |
---|
1083 | { |
---|
1084 | cs8900_device *cs = ifp->if_softc; |
---|
1085 | int error = 0; |
---|
1086 | |
---|
1087 | switch (cmd) |
---|
1088 | { |
---|
1089 | case SIOCGIFADDR: |
---|
1090 | case SIOCSIFADDR: |
---|
1091 | |
---|
1092 | error = ether_ioctl (ifp, cmd, data); |
---|
1093 | break; |
---|
1094 | |
---|
1095 | case SIOCSIFFLAGS: |
---|
1096 | |
---|
1097 | switch (ifp->if_flags & (IFF_UP | IFF_RUNNING)) |
---|
1098 | { |
---|
1099 | case IFF_RUNNING: |
---|
1100 | |
---|
1101 | cs8900_stop (cs); |
---|
1102 | break; |
---|
1103 | |
---|
1104 | case IFF_UP: |
---|
1105 | |
---|
1106 | cs8900_init (cs); |
---|
1107 | break; |
---|
1108 | |
---|
1109 | case IFF_UP | IFF_RUNNING: |
---|
1110 | |
---|
1111 | cs8900_stop (cs); |
---|
1112 | cs8900_init (cs); |
---|
1113 | break; |
---|
1114 | |
---|
1115 | default: |
---|
1116 | break; |
---|
1117 | } |
---|
1118 | break; |
---|
1119 | |
---|
1120 | case SIO_RTEMS_SHOW_STATS: |
---|
1121 | |
---|
1122 | cs8900_stats (cs); |
---|
1123 | break; |
---|
1124 | |
---|
1125 | /* FIXME: Multicast commands must be added here. */ |
---|
1126 | |
---|
1127 | default: |
---|
1128 | error = EINVAL; |
---|
1129 | break; |
---|
1130 | } |
---|
1131 | |
---|
1132 | return error; |
---|
1133 | } |
---|
1134 | |
---|
1135 | int |
---|
1136 | cs8900_driver_attach (struct rtems_bsdnet_ifconfig *config, int attaching) |
---|
1137 | { |
---|
1138 | cs8900_device *cs; |
---|
1139 | struct ifnet *ifp; |
---|
1140 | int mtu; |
---|
1141 | int unit; |
---|
1142 | char *name; |
---|
1143 | |
---|
1144 | /* |
---|
1145 | * Parse driver name |
---|
1146 | */ |
---|
1147 | |
---|
1148 | if ((unit = rtems_bsdnet_parse_driver_name (config, &name)) < 0) |
---|
1149 | return 0; |
---|
1150 | |
---|
1151 | cs = config->drv_ctrl; |
---|
1152 | cs->dev = unit; |
---|
1153 | ifp = &cs->arpcom.ac_if; |
---|
1154 | |
---|
1155 | if (attaching) |
---|
1156 | { |
---|
1157 | if (ifp->if_softc) |
---|
1158 | { |
---|
1159 | printf ("Driver `%s' already in use.\n", config->name); |
---|
1160 | return 0; |
---|
1161 | } |
---|
1162 | |
---|
1163 | /* |
---|
1164 | * Process options |
---|
1165 | */ |
---|
1166 | |
---|
1167 | if (config->hardware_address) |
---|
1168 | memcpy (cs->arpcom.ac_enaddr, config->hardware_address, ETHER_ADDR_LEN); |
---|
1169 | else |
---|
1170 | cs8900_get_mac_addr (cs, cs->arpcom.ac_enaddr); |
---|
1171 | |
---|
1172 | if (config->mtu) |
---|
1173 | mtu = config->mtu; |
---|
1174 | else |
---|
1175 | mtu = ETHERMTU; |
---|
1176 | |
---|
1177 | cs->accept_bcast = !config->ignore_broadcast; |
---|
1178 | |
---|
1179 | /* |
---|
1180 | * Set up network interface values. |
---|
1181 | */ |
---|
1182 | |
---|
1183 | ifp->if_softc = cs; |
---|
1184 | ifp->if_unit = unit; |
---|
1185 | ifp->if_name = name; |
---|
1186 | ifp->if_mtu = mtu; |
---|
1187 | ifp->if_init = cs8900_init; |
---|
1188 | ifp->if_ioctl = cs8900_ioctl; |
---|
1189 | ifp->if_start = cs8900_start; |
---|
1190 | ifp->if_output = ether_output; |
---|
1191 | ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX; |
---|
1192 | |
---|
1193 | if (ifp->if_snd.ifq_maxlen == 0) |
---|
1194 | ifp->if_snd.ifq_maxlen = ifqmaxlen; |
---|
1195 | |
---|
1196 | /* |
---|
1197 | * Attach the interface to the stack. |
---|
1198 | */ |
---|
1199 | |
---|
1200 | if_attach (ifp); |
---|
1201 | ether_ifattach (ifp); |
---|
1202 | } |
---|
1203 | else |
---|
1204 | { |
---|
1205 | if (!ifp->if_softc) |
---|
1206 | { |
---|
1207 | printf ("Driver `%s' not found.\n", config->name); |
---|
1208 | return 0; |
---|
1209 | } |
---|
1210 | |
---|
1211 | cs8900_stop (cs); |
---|
1212 | cs8900_detach_interrupt (cs); |
---|
1213 | } |
---|
1214 | |
---|
1215 | return 1; |
---|
1216 | } |
---|