1 | /* SPWCUC - SpaceWire - CCSDS unsegmented Code Transfer Protocol GRLIB core |
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2 | * register driver interface. |
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3 | * |
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4 | * COPYRIGHT (c) 2009. |
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5 | * Cobham Gaisler AB. |
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6 | * |
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7 | * The license and distribution terms for this file may be |
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8 | * found in the file LICENSE in this distribution or at |
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9 | * http://www.rtems.org/license/LICENSE. |
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10 | */ |
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11 | |
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12 | #include <drvmgr/drvmgr.h> |
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13 | #include <drvmgr/ambapp_bus.h> |
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14 | #include <stdlib.h> |
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15 | #include <string.h> |
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16 | |
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17 | #include <bsp/spwcuc.h> |
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18 | |
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19 | /* Private structure of SPWCUC driver. */ |
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20 | struct spwcuc_priv { |
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21 | struct drvmgr_dev *dev; |
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22 | struct spwcuc_regs *regs; |
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23 | int open; |
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24 | |
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25 | spwcuc_isr_t user_isr; |
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26 | void *user_isr_arg; |
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27 | |
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28 | struct spwcuc_stats stats; |
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29 | }; |
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30 | |
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31 | void spwcuc_isr(void *data); |
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32 | |
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33 | struct amba_drv_info spwcuc_drv_info; |
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34 | |
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35 | /* Hardware Reset of SPWCUC */ |
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36 | static int spwcuc_hw_reset(struct spwcuc_priv *priv) |
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37 | { |
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38 | struct spwcuc_regs *r = priv->regs; |
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39 | int i = 1000; |
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40 | |
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41 | r->control = 1; |
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42 | |
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43 | while ((r->control & 1) && i > 0) { |
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44 | i--; |
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45 | } |
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46 | |
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47 | spwcuc_clear_irqs(priv, -1); |
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48 | |
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49 | return i ? 0 : -1; |
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50 | } |
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51 | |
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52 | int spwcuc_reset(void *spwcuc) |
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53 | { |
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54 | struct spwcuc_priv *priv = (struct spwcuc_priv *)spwcuc; |
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55 | |
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56 | return spwcuc_hw_reset(priv); |
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57 | } |
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58 | |
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59 | void *spwcuc_open(int minor) |
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60 | { |
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61 | struct spwcuc_priv *priv; |
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62 | struct drvmgr_dev *dev; |
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63 | |
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64 | /* Get Device from Minor */ |
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65 | if ( drvmgr_get_dev(&spwcuc_drv_info.general, minor, &dev) ) { |
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66 | return NULL; |
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67 | } |
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68 | |
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69 | priv = dev->priv; |
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70 | if ( (priv == NULL) || priv->open ) |
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71 | return NULL; |
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72 | |
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73 | /* Set initial state of software */ |
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74 | priv->open = 1; |
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75 | |
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76 | /* Clear Statistics */ |
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77 | spwcuc_clr_stats(priv); |
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78 | priv->user_isr = NULL; |
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79 | priv->user_isr_arg = NULL; |
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80 | |
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81 | return priv; |
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82 | } |
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83 | |
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84 | void spwcuc_close(void *spwcuc) |
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85 | { |
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86 | struct spwcuc_priv *priv = (struct spwcuc_priv *)spwcuc; |
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87 | |
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88 | if ( priv->open == 0 ) |
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89 | return; |
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90 | |
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91 | /* Reset Hardware */ |
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92 | spwcuc_hw_reset(priv); |
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93 | |
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94 | priv->open = 0; |
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95 | } |
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96 | |
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97 | void spwcuc_int_enable(void *spwcuc) |
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98 | { |
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99 | struct spwcuc_priv *priv = (struct spwcuc_priv *)spwcuc; |
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100 | |
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101 | /* Register and Enable Interrupt at Interrupt controller */ |
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102 | drvmgr_interrupt_register(priv->dev, 0, "spwcuc", spwcuc_isr, priv); |
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103 | } |
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104 | |
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105 | void spwcuc_int_disable(void *spwcuc) |
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106 | { |
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107 | struct spwcuc_priv *priv = (struct spwcuc_priv *)spwcuc; |
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108 | |
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109 | /* Enable Interrupt at Interrupt controller */ |
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110 | drvmgr_interrupt_unregister(priv->dev, 0, spwcuc_isr, priv); |
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111 | } |
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112 | |
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113 | void spwcuc_clr_stats(void *spwcuc) |
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114 | { |
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115 | struct spwcuc_priv *priv = (struct spwcuc_priv *)spwcuc; |
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116 | |
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117 | memset(&priv->stats, 0, sizeof(priv->stats)); |
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118 | } |
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119 | |
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120 | void spwcuc_get_stats(void *spwcuc, struct spwcuc_stats *stats) |
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121 | { |
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122 | struct spwcuc_priv *priv = (struct spwcuc_priv *)spwcuc; |
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123 | |
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124 | memcpy(stats, &priv->stats, sizeof(priv->stats)); |
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125 | } |
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126 | |
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127 | /* Configure the spwcuc core */ |
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128 | void spwcuc_config(void *spwcuc, struct spwcuc_cfg *cfg) |
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129 | { |
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130 | struct spwcuc_priv *priv = (struct spwcuc_priv *)spwcuc; |
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131 | struct spwcuc_regs *r = priv->regs; |
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132 | |
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133 | r->config = (cfg->sel_out & 0x1f) << 28 | |
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134 | (cfg->sel_in & 0x1f) << 24 | |
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135 | (cfg->mapping & 0x1f) << 16 | |
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136 | (cfg->tolerance & 0x1f) << 8 | |
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137 | (cfg->tid & 0x7) << 4 | |
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138 | (cfg->ctf & 1) << 1 | |
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139 | (cfg->cp & 1); |
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140 | |
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141 | r->control = (cfg->txen & 1) << 1 | |
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142 | (cfg->rxen & 1) << 2 | |
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143 | (cfg->pktsyncen & 1) << 3 | |
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144 | (cfg->pktiniten & 1) << 4 | |
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145 | (cfg->pktrxen & 1) << 5; |
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146 | |
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147 | r->dla = (cfg->dla_mask & 0xff)<<8 | (cfg->dla & 0xff); |
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148 | |
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149 | r->pid = cfg->pid; |
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150 | |
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151 | r->offset = cfg->offset; |
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152 | } |
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153 | |
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154 | /* Return elapsed coarse time */ |
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155 | unsigned int spwcuc_get_et_coarse(void *spwcuc) |
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156 | { |
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157 | struct spwcuc_priv *priv = (struct spwcuc_priv *)spwcuc; |
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158 | |
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159 | return priv->regs->etct; |
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160 | } |
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161 | |
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162 | /* Return elapsed fine time */ |
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163 | unsigned int spwcuc_get_et_fine(void *spwcuc) |
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164 | { |
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165 | struct spwcuc_priv *priv = (struct spwcuc_priv *)spwcuc; |
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166 | |
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167 | return (priv->regs->etft & 0xffffff) >> 8; |
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168 | } |
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169 | |
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170 | /* Return elapsed time (coarse and fine) */ |
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171 | unsigned long long spwcuc_get_et(void *spwcuc) |
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172 | { |
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173 | return (((unsigned long long)spwcuc_get_et_coarse(spwcuc)) << 24) | spwcuc_get_et_fine(spwcuc); |
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174 | } |
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175 | |
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176 | /* Return next elapsed coarse time (for use when sending SpW time packet) */ |
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177 | unsigned int spwcuc_get_next_et_coarse(void *spwcuc) |
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178 | { |
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179 | struct spwcuc_priv *priv = (struct spwcuc_priv *)spwcuc; |
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180 | |
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181 | return priv->regs->etct_next; |
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182 | } |
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183 | |
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184 | /* Return next elapsed fine time (for use when sending SpW time packet) */ |
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185 | unsigned int spwcuc_get_next_et_fine(void *spwcuc) |
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186 | { |
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187 | struct spwcuc_priv *priv = (struct spwcuc_priv *)spwcuc; |
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188 | |
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189 | return (priv->regs->etft_next & 0xffffff) >> 8; |
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190 | } |
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191 | |
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192 | /* Return next elapsed time (for use when sending SpW time packet) */ |
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193 | unsigned long long spwcuc_get_next_et(void *spwcuc) |
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194 | { |
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195 | return (((unsigned long long)spwcuc_get_next_et_coarse(spwcuc)) << 24) | spwcuc_get_next_et_fine(spwcuc); |
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196 | } |
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197 | |
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198 | /* Force/Set the elapsed time (coarse 32-bit and fine 24-bit) by writing the |
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199 | * T-Field Time Packet Registers then the FORCE, NEW and INIT bits. |
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200 | * The latter three are needed for the ET to be set with the new value. |
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201 | */ |
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202 | void spwcuc_force_et(void *spwcuc, unsigned long long time) |
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203 | { |
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204 | struct spwcuc_priv *priv = (struct spwcuc_priv *)spwcuc; |
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205 | struct spwcuc_regs *regs = priv->regs; |
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206 | |
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207 | regs->etft_next = (time & 0xffffff) << 8; |
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208 | regs->etct_next = (time >> 24) & 0xffffffff; |
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209 | regs->pkt_pf_crc = (1 << 29) | (1 << 30) | (1 << 31); |
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210 | } |
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211 | |
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212 | /* Return received (from time packet) elapsed coarse time */ |
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213 | unsigned int spwcuc_get_tp_et_coarse(void *spwcuc) |
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214 | { |
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215 | struct spwcuc_priv *priv = (struct spwcuc_priv *)spwcuc; |
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216 | |
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217 | return priv->regs->pkt_ct; |
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218 | } |
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219 | |
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220 | /* Return received (from time packet) elapsed fine time */ |
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221 | unsigned int spwcuc_get_tp_et_fine(void *spwcuc) |
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222 | { |
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223 | struct spwcuc_priv *priv = (struct spwcuc_priv *)spwcuc; |
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224 | |
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225 | return (priv->regs->pkt_ft & 0xffffff) >> 8; |
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226 | } |
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227 | |
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228 | /* Return received (from time packet) elapsed time (coarse and fine) */ |
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229 | unsigned long long spwcuc_get_tp_et(void *spwcuc) |
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230 | { |
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231 | return (((unsigned long long)spwcuc_get_tp_et_coarse(spwcuc)) << 24) | spwcuc_get_tp_et_fine(spwcuc); |
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232 | } |
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233 | |
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234 | /* Clear interrupts */ |
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235 | void spwcuc_clear_irqs(void *spwcuc, int irqs) |
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236 | { |
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237 | struct spwcuc_priv *priv = (struct spwcuc_priv *)spwcuc; |
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238 | |
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239 | priv->regs->picr = irqs; |
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240 | } |
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241 | |
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242 | /* Enable interrupts */ |
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243 | void spwcuc_enable_irqs(void *spwcuc, int irqs) |
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244 | { |
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245 | struct spwcuc_priv *priv = (struct spwcuc_priv *)spwcuc; |
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246 | |
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247 | priv->regs->imr = irqs; |
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248 | } |
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249 | |
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250 | struct spwcuc_regs *spwcuc_get_regs(void *spwcuc) |
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251 | { |
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252 | struct spwcuc_priv *priv = (struct spwcuc_priv *)spwcuc; |
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253 | |
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254 | return priv->regs; |
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255 | } |
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256 | |
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257 | void spwcuc_int_register(void *spwcuc, spwcuc_isr_t func, void *data) |
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258 | { |
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259 | struct spwcuc_priv *priv = (struct spwcuc_priv *)spwcuc; |
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260 | |
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261 | priv->user_isr = func; |
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262 | priv->user_isr_arg = data; |
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263 | } |
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264 | |
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265 | void spwcuc_isr(void *data) |
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266 | { |
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267 | struct spwcuc_priv *priv = data; |
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268 | struct spwcuc_stats *stats = &priv->stats; |
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269 | unsigned int pimr = priv->regs->pimr; |
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270 | |
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271 | stats->nirqs++; |
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272 | |
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273 | if (pimr & PKT_INIT_IRQ) |
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274 | stats->pkt_init++; |
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275 | if (pimr & PKT_ERR_IRQ) |
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276 | stats->pkt_err++; |
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277 | if (pimr & PKT_RX_IRQ) |
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278 | stats->pkt_rx++; |
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279 | if (pimr & WRAP_ERR_IRQ) |
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280 | stats->wraperr++; |
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281 | if (pimr & WRAP_IRQ) |
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282 | stats->wrap++; |
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283 | if (pimr & SYNC_ERR_IRQ) |
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284 | stats->syncerr++; |
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285 | if (pimr & SYNC_IRQ) |
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286 | stats->sync++; |
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287 | if (pimr & TOL_ERR_IRQ) |
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288 | stats->tolerr++; |
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289 | if (pimr & TICK_RX_ERR_IRQ) |
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290 | stats->tick_rx_error++; |
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291 | if (pimr & TICK_RX_WRAP_IRQ) |
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292 | stats->tick_rx_wrap++; |
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293 | if (pimr & TICK_RX_IRQ) |
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294 | stats->tick_rx++; |
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295 | if (pimr & TICK_TX_WRAP_IRQ) |
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296 | stats->tick_tx_wrap++; |
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297 | if (pimr & TICK_TX_IRQ) |
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298 | stats->tick_tx++; |
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299 | |
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300 | /* Let user Handle Interrupt */ |
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301 | if ( priv->user_isr ) |
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302 | priv->user_isr(pimr, priv->user_isr_arg); |
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303 | } |
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304 | |
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305 | /*** INTERFACE TO DRIVER MANAGER ***/ |
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306 | |
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307 | static int spwcuc_init2(struct drvmgr_dev *dev) |
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308 | { |
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309 | struct amba_dev_info *ambadev; |
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310 | struct ambapp_core *pnpinfo; |
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311 | struct spwcuc_priv *priv; |
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312 | struct spwcuc_regs *regs; |
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313 | |
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314 | priv = (struct spwcuc_priv *)malloc(sizeof(*priv)); |
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315 | if ( priv == NULL ) |
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316 | return -1; |
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317 | memset(priv, 0, sizeof(*priv)); |
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318 | priv->dev = dev; |
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319 | dev->priv = priv; |
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320 | |
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321 | /* Get device information from AMBA PnP information */ |
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322 | ambadev = (struct amba_dev_info *)dev->businfo; |
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323 | if ( ambadev == NULL ) { |
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324 | return -1; |
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325 | } |
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326 | pnpinfo = &ambadev->info; |
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327 | regs = (struct spwcuc_regs *)pnpinfo->apb_slv->start; |
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328 | |
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329 | priv->regs = regs; |
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330 | |
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331 | spwcuc_hw_reset(priv); |
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332 | |
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333 | return 0; |
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334 | } |
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335 | |
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336 | struct drvmgr_drv_ops spwcuc_ops = |
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337 | { |
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338 | {NULL, spwcuc_init2, NULL, NULL}, |
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339 | NULL, |
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340 | NULL |
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341 | }; |
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342 | |
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343 | struct amba_dev_id spwcuc_ids[] = |
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344 | { |
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345 | {VENDOR_GAISLER, GAISLER_SPWCUC}, |
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346 | {0, 0} /* Mark end of table */ |
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347 | }; |
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348 | |
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349 | struct amba_drv_info spwcuc_drv_info = |
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350 | { |
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351 | { |
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352 | DRVMGR_OBJ_DRV, /* Driver */ |
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353 | NULL, /* Next driver */ |
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354 | NULL, /* Device list */ |
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355 | DRIVER_AMBAPP_GAISLER_SPWCUC_ID,/* Driver ID */ |
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356 | "SPWCUC_DRV", /* Driver Name */ |
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357 | DRVMGR_BUS_TYPE_AMBAPP, /* Bus Type */ |
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358 | &spwcuc_ops, |
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359 | NULL, /* Funcs */ |
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360 | 0, /* No devices yet */ |
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361 | 0, |
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362 | }, |
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363 | &spwcuc_ids[0] |
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364 | }; |
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365 | |
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366 | /* Register the SPWCUC Driver */ |
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367 | void spwcuc_register(void) |
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368 | { |
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369 | drvmgr_drv_register(&spwcuc_drv_info.general); |
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370 | } |
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