1 | /* GRCTM - CCSDS Time Manager - register driver interface. |
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2 | * |
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3 | * COPYRIGHT (c) 2009. |
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4 | * Cobham Gaisler AB. |
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5 | * |
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6 | * The license and distribution terms for this file may be |
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7 | * found in the file LICENSE in this distribution or at |
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8 | * http://www.rtems.org/license/LICENSE. |
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9 | */ |
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10 | |
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11 | #include <drvmgr/drvmgr.h> |
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12 | #include <drvmgr/ambapp_bus.h> |
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13 | #include <stdlib.h> |
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14 | #include <string.h> |
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15 | |
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16 | #include <bsp/grctm.h> |
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17 | |
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18 | #include <grlib_impl.h> |
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19 | |
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20 | /* Private structure of GRCTM driver */ |
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21 | struct grctm_priv { |
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22 | struct drvmgr_dev *dev; |
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23 | struct grctm_regs *regs; |
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24 | int open; |
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25 | |
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26 | grctm_isr_t user_isr; |
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27 | void *user_isr_arg; |
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28 | |
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29 | struct grctm_stats stats; |
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30 | }; |
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31 | |
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32 | void grctm_isr(void *data); |
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33 | |
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34 | struct amba_drv_info grctm_drv_info; |
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35 | |
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36 | void *grctm_open(int minor) |
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37 | { |
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38 | struct grctm_priv *priv; |
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39 | struct drvmgr_dev *dev; |
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40 | |
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41 | /* Get Device from Minor */ |
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42 | if ( drvmgr_get_dev(&grctm_drv_info.general, minor, &dev) ) { |
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43 | return NULL; |
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44 | } |
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45 | |
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46 | priv = dev->priv; |
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47 | if ( (priv == NULL) || priv->open ) |
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48 | return NULL; |
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49 | |
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50 | /* Set initial state of software */ |
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51 | priv->open = 1; |
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52 | |
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53 | /* Clear Statistics */ |
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54 | grctm_clr_stats(priv); |
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55 | priv->user_isr = NULL; |
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56 | priv->user_isr_arg = NULL; |
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57 | |
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58 | return priv; |
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59 | } |
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60 | |
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61 | void grctm_close(void *grctm) |
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62 | { |
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63 | struct grctm_priv *priv = (struct grctm_priv *)grctm; |
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64 | |
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65 | if ( priv->open == 0 ) |
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66 | return; |
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67 | |
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68 | /* Reset Hardware */ |
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69 | grctm_reset(priv); |
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70 | |
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71 | priv->open = 0; |
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72 | } |
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73 | |
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74 | /* Hardware Reset of GRCTM */ |
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75 | int grctm_reset(void *grctm) |
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76 | { |
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77 | struct grctm_priv *priv = grctm; |
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78 | struct grctm_regs *r = priv->regs; |
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79 | |
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80 | r->grr = 0x55000001; |
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81 | |
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82 | int i = 1000; |
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83 | while ((r->grr & 1) && i > 0) { |
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84 | i--; |
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85 | } |
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86 | |
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87 | return i ? 0 : -1; |
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88 | } |
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89 | |
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90 | void grctm_int_enable(void *grctm) |
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91 | { |
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92 | struct grctm_priv *priv = (struct grctm_priv *)grctm; |
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93 | |
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94 | /* Register and Enable Interrupt at Interrupt controller */ |
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95 | drvmgr_interrupt_register(priv->dev, 0, "grctm", grctm_isr, priv); |
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96 | } |
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97 | |
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98 | void grctm_int_disable(void *grctm) |
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99 | { |
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100 | struct grctm_priv *priv = (struct grctm_priv *)grctm; |
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101 | |
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102 | /* Enable Interrupt at Interrupt controller */ |
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103 | drvmgr_interrupt_unregister(priv->dev, 0, grctm_isr, priv); |
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104 | } |
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105 | |
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106 | void grctm_clr_stats(void *grctm) |
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107 | { |
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108 | struct grctm_priv *priv = (struct grctm_priv *)grctm; |
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109 | |
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110 | memset(&priv->stats, 0, sizeof(priv->stats)); |
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111 | } |
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112 | |
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113 | void grctm_get_stats(void *grctm, struct grctm_stats *stats) |
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114 | { |
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115 | struct grctm_priv *priv = (struct grctm_priv *)grctm; |
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116 | |
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117 | memcpy(stats, &priv->stats, sizeof(priv->stats)); |
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118 | } |
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119 | |
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120 | /* Enable external synchronisation (from grctm) */ |
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121 | void grctm_enable_ext_sync(void *grctm) |
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122 | { |
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123 | struct grctm_priv *priv = grctm; |
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124 | |
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125 | priv->regs->gcr |= 0x55<<24 | 1<<9; |
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126 | } |
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127 | |
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128 | /* Disable external synchronisation (from grctm) */ |
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129 | void grctm_disable_ext_sync(void *grctm) |
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130 | { |
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131 | struct grctm_priv *priv = grctm; |
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132 | |
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133 | priv->regs->gcr &= ~((0xAA<<24) | 1<<9); |
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134 | } |
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135 | |
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136 | /* Enable TimeWire synchronisation */ |
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137 | void grctm_enable_tw_sync(void *grctm) |
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138 | { |
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139 | struct grctm_priv *priv = grctm; |
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140 | |
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141 | priv->regs->gcr |= 0x55<<24 | 1<<8; |
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142 | } |
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143 | |
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144 | /* Disable TimeWire synchronisation */ |
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145 | void grctm_disable_tw_sync(void *grctm) |
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146 | { |
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147 | struct grctm_priv *priv = grctm; |
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148 | |
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149 | priv->regs->gcr &= ~((0xAA<<24) | 1<<8); |
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150 | } |
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151 | |
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152 | /* Disable frequency synthesizer from driving ET */ |
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153 | void grctm_disable_fs(void *grctm) |
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154 | { |
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155 | struct grctm_priv *priv = grctm; |
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156 | |
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157 | priv->regs->gcr |= 0x55<<24 | 1<<7; |
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158 | } |
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159 | |
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160 | /* Enable frequency synthesizer to drive ET */ |
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161 | void grctm_enable_fs(void *grctm) |
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162 | { |
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163 | struct grctm_priv *priv = grctm; |
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164 | |
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165 | priv->regs->gcr &= ~((0xAA<<24) | 1<<7); |
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166 | } |
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167 | |
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168 | /* Return elapsed coarse time */ |
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169 | unsigned int grctm_get_et_coarse(void *grctm) |
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170 | { |
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171 | struct grctm_priv *priv = grctm; |
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172 | |
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173 | return priv->regs->etcr; |
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174 | } |
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175 | |
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176 | /* Return elapsed fine time */ |
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177 | unsigned int grctm_get_et_fine(void *grctm) |
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178 | { |
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179 | struct grctm_priv *priv = grctm; |
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180 | |
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181 | return (priv->regs->etfr & 0xffffff00) >> 8; |
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182 | } |
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183 | |
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184 | /* Return elapsed time (coarse and fine) */ |
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185 | unsigned long long grctm_get_et(void *grctm) |
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186 | { |
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187 | return (((unsigned long)grctm_get_et_coarse(grctm)) << 24) | grctm_get_et_fine(grctm); |
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188 | } |
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189 | |
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190 | |
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191 | /* Return 1 if specified datation has been latched */ |
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192 | int grctm_is_dat_latched(void *grctm, int dat) |
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193 | { |
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194 | struct grctm_priv *priv = grctm; |
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195 | |
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196 | return (priv->regs->gsr >> dat) & 1; |
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197 | } |
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198 | |
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199 | /* Set triggering edge of datation input */ |
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200 | void grctm_set_dat_edge(void *grctm, int dat, int edge) |
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201 | { |
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202 | struct grctm_priv *priv = grctm; |
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203 | |
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204 | priv->regs->gcr &= ~((0xAA<<24) | 1 << (10+dat)); |
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205 | priv->regs->gcr |= 0x55<<24 | (edge&1) << (10+dat); |
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206 | } |
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207 | |
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208 | /* Return latched datation coarse time */ |
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209 | unsigned int grctm_get_dat_coarse(void *grctm, int dat) |
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210 | { |
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211 | struct grctm_priv *priv = grctm; |
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212 | |
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213 | switch (dat) { |
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214 | case 0 : return priv->regs->dcr0; |
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215 | case 1 : return priv->regs->dcr1; |
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216 | case 2 : return priv->regs->dcr2; |
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217 | default: return -1; |
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218 | } |
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219 | } |
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220 | |
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221 | /* Return latched datation fine time */ |
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222 | unsigned int grctm_get_dat_fine(void *grctm, int dat) |
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223 | { |
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224 | struct grctm_priv *priv = grctm; |
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225 | |
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226 | switch (dat) { |
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227 | case 0 : return (priv->regs->dfr0 & 0xffffff00) >> 8; |
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228 | case 1 : return (priv->regs->dfr1 & 0xffffff00) >> 8; |
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229 | case 2 : return (priv->regs->dfr2 & 0xffffff00) >> 8; |
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230 | default: return -1; |
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231 | } |
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232 | } |
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233 | |
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234 | |
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235 | /* Return latched datation ET */ |
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236 | unsigned long long grctm_get_dat_et(void *grctm, int dat) |
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237 | { |
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238 | return (((unsigned long)grctm_get_dat_coarse(grctm, dat)) << 24) | |
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239 | grctm_get_dat_fine(grctm, dat); |
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240 | } |
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241 | |
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242 | |
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243 | /* Return current pulse configuration */ |
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244 | unsigned int grctm_get_pulse_reg(void *grctm, int pulse) |
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245 | { |
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246 | struct grctm_priv *priv = grctm; |
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247 | |
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248 | return priv->regs->pdr[pulse]; |
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249 | } |
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250 | |
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251 | /* Set pulse register */ |
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252 | void grctm_set_pulse_reg(void *grctm, int pulse, unsigned int val) |
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253 | { |
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254 | struct grctm_priv *priv = grctm; |
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255 | |
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256 | priv->regs->pdr[pulse] = val; |
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257 | } |
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258 | |
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259 | /* Configure pulse: pp = period, pw = width, pl = level, en = enable */ |
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260 | void grctm_cfg_pulse(void *grctm, int pulse, int pp, int pw, int pl, int en) |
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261 | { |
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262 | grctm_set_pulse_reg(grctm, pulse, (pp&0xf)<<20 | (pw&0xf)<<16 | (pl&1)<<10 | (en&1)<<1); |
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263 | } |
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264 | |
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265 | /* Enable pulse output */ |
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266 | void grctm_enable_pulse(void *grctm, int pulse) |
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267 | { |
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268 | struct grctm_priv *priv = grctm; |
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269 | |
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270 | priv->regs->pdr[pulse] |= 0x2; |
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271 | } |
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272 | |
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273 | /* Disable pulse output */ |
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274 | void grctm_disable_pulse(void *grctm, int pulse) |
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275 | { |
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276 | struct grctm_priv *priv = grctm; |
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277 | |
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278 | priv->regs->pdr[pulse] &= ~0x2; |
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279 | } |
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280 | |
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281 | /* Clear interrupts */ |
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282 | void grctm_clear_irqs(void *grctm, int irqs) |
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283 | { |
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284 | struct grctm_priv *priv = grctm; |
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285 | |
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286 | priv->regs->picr = irqs; |
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287 | } |
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288 | |
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289 | /* Enable interrupts */ |
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290 | void grctm_enable_irqs(void *grctm, int irqs) |
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291 | { |
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292 | struct grctm_priv *priv = grctm; |
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293 | |
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294 | priv->regs->imr = irqs; |
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295 | } |
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296 | |
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297 | /* Set Frequency synthesizer increment */ |
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298 | void grctm_set_fs_incr(void *grctm, int incr) |
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299 | { |
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300 | struct grctm_priv *priv = grctm; |
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301 | |
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302 | priv->regs->fsir = incr; |
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303 | } |
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304 | |
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305 | /* Set ET increment */ |
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306 | void grctm_set_et_incr(void *grctm, int incr) |
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307 | { |
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308 | struct grctm_priv *priv = grctm; |
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309 | |
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310 | priv->regs->etir = incr; |
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311 | } |
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312 | |
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313 | |
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314 | void grctm_isr(void *data) |
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315 | { |
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316 | struct grctm_priv *priv = data; |
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317 | struct grctm_stats *stats = &priv->stats; |
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318 | unsigned int pimr = priv->regs->pimr; |
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319 | |
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320 | if ( pimr == 0 ) |
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321 | return; |
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322 | |
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323 | stats->nirqs++; |
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324 | if (pimr & PULSE0_IRQ ) |
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325 | stats->pulse++; |
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326 | |
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327 | /* Let user Handle Interrupt */ |
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328 | if ( priv->user_isr ) |
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329 | priv->user_isr(pimr, priv->user_isr_arg); |
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330 | } |
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331 | |
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332 | struct grctm_regs *grctm_get_regs(void *grctm) |
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333 | { |
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334 | struct grctm_priv *priv = (struct grctm_priv *)grctm; |
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335 | |
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336 | return priv->regs; |
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337 | } |
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338 | |
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339 | void grctm_int_register(void *grctm, grctm_isr_t func, void *data) |
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340 | { |
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341 | struct grctm_priv *priv = (struct grctm_priv *)grctm; |
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342 | |
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343 | priv->user_isr = func; |
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344 | priv->user_isr_arg = data; |
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345 | } |
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346 | |
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347 | /*** INTERFACE TO DRIVER MANAGER ***/ |
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348 | |
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349 | static int grctm_init2(struct drvmgr_dev *dev) |
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350 | { |
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351 | struct amba_dev_info *ambadev; |
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352 | struct ambapp_core *pnpinfo; |
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353 | struct grctm_priv *priv; |
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354 | struct grctm_regs *regs; |
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355 | |
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356 | priv = grlib_calloc(1, sizeof(*priv)); |
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357 | if ( priv == NULL ) |
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358 | return -1; |
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359 | priv->dev = dev; |
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360 | dev->priv = priv; |
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361 | |
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362 | /* Get device information from AMBA PnP information */ |
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363 | ambadev = (struct amba_dev_info *)dev->businfo; |
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364 | if ( ambadev == NULL ) { |
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365 | return -1; |
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366 | } |
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367 | pnpinfo = &ambadev->info; |
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368 | regs = (struct grctm_regs *)pnpinfo->ahb_slv->start[0]; |
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369 | |
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370 | priv->regs = regs; |
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371 | |
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372 | grctm_reset(priv); |
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373 | |
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374 | return 0; |
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375 | } |
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376 | |
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377 | struct drvmgr_drv_ops grctm_ops = |
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378 | { |
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379 | {NULL, grctm_init2, NULL, NULL}, |
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380 | NULL, |
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381 | NULL |
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382 | }; |
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383 | |
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384 | struct amba_dev_id grctm_ids[] = |
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385 | { |
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386 | {VENDOR_GAISLER, GAISLER_GRCTM}, |
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387 | {0, 0} /* Mark end of table */ |
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388 | }; |
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389 | |
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390 | struct amba_drv_info grctm_drv_info = |
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391 | { |
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392 | { |
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393 | DRVMGR_OBJ_DRV, /* Driver */ |
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394 | NULL, /* Next driver */ |
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395 | NULL, /* Device list */ |
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396 | DRIVER_AMBAPP_GAISLER_GRCTM_ID, /* Driver ID */ |
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397 | "GRCTM_DRV", /* Driver Name */ |
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398 | DRVMGR_BUS_TYPE_AMBAPP, /* Bus Type */ |
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399 | &grctm_ops, |
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400 | NULL, /* Funcs */ |
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401 | 0, /* No devices yet */ |
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402 | 0, |
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403 | }, |
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404 | &grctm_ids[0] |
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405 | }; |
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406 | |
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407 | /* Register the grctm Driver */ |
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408 | void grctm_register(void) |
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409 | { |
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410 | drvmgr_drv_register(&grctm_drv_info.general); |
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411 | } |
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