1 | /* Driver Manager Driver Interface Implementation. |
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2 | * |
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3 | * COPYRIGHT (c) 2009 Cobham Gaisler AB. |
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4 | * |
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5 | * The license and distribution terms for this file may be |
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6 | * found in the file LICENSE in this distribution or at |
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7 | * http://www.rtems.org/license/LICENSE. |
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8 | * |
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9 | */ |
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10 | |
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11 | /* |
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12 | * This is the part the device driver API, the functions rely on that the |
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13 | * parent bus driver has implemented the neccessary operations correctly. |
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14 | * |
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15 | */ |
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16 | |
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17 | #include <stdio.h> |
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18 | #include <stdlib.h> |
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19 | #include <string.h> |
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20 | |
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21 | #include <drvmgr/drvmgr.h> |
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22 | #include "drvmgr_internal.h" |
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23 | |
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24 | /* Get device pointer from knowing the Driver and the Driver minor |
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25 | * that was assigned to it |
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26 | */ |
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27 | int drvmgr_get_dev( |
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28 | struct drvmgr_drv *drv, |
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29 | int minor, |
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30 | struct drvmgr_dev **pdev) |
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31 | { |
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32 | struct drvmgr_dev *dev; |
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33 | if (!drv) |
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34 | return -1; |
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35 | |
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36 | DRVMGR_LOCK_READ(); |
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37 | dev = drv->dev; |
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38 | while (dev) { |
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39 | if (dev->minor_drv == minor) |
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40 | break; |
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41 | dev = dev->next_in_drv; |
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42 | } |
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43 | DRVMGR_UNLOCK(); |
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44 | if (!dev) |
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45 | return -1; |
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46 | if (pdev) |
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47 | *pdev = dev; |
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48 | return 0; |
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49 | } |
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50 | |
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51 | /* Get Bus frequency in HZ from bus driver */ |
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52 | int drvmgr_freq_get( |
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53 | struct drvmgr_dev *dev, |
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54 | int options, |
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55 | unsigned int *freq_hz) |
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56 | { |
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57 | if (!dev || !dev->parent || !dev->parent->ops->freq_get) |
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58 | return -1; |
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59 | |
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60 | return dev->parent->ops->freq_get(dev, options, freq_hz); |
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61 | } |
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62 | |
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63 | /* Get driver prefix */ |
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64 | int drvmgr_get_dev_prefix(struct drvmgr_dev *dev, char *dev_prefix) |
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65 | { |
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66 | struct drvmgr_bus_params params; |
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67 | if (!dev || !dev->parent || !dev->parent->ops->get_params) |
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68 | return -1; |
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69 | |
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70 | dev->parent->ops->get_params(dev, ¶ms); |
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71 | if (!params.dev_prefix) |
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72 | return -1; |
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73 | if (dev_prefix) |
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74 | strcpy(dev_prefix, params.dev_prefix); |
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75 | return 0; |
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76 | } |
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77 | |
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78 | /* Register an interrupt */ |
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79 | int drvmgr_interrupt_register( |
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80 | struct drvmgr_dev *dev, |
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81 | int index, |
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82 | const char *info, |
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83 | drvmgr_isr isr, |
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84 | void *arg) |
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85 | { |
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86 | if (!dev || !dev->parent || !dev->parent->ops->int_register) |
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87 | return -1; |
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88 | |
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89 | if (!isr) |
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90 | return -1; |
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91 | |
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92 | return dev->parent->ops->int_register(dev, index, info, isr, arg); |
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93 | } |
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94 | |
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95 | /* Unregister an interrupt */ |
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96 | int drvmgr_interrupt_unregister( |
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97 | struct drvmgr_dev *dev, |
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98 | int index, |
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99 | drvmgr_isr isr, |
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100 | void *arg) |
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101 | { |
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102 | if (!dev || !dev->parent || !dev->parent->ops->int_unregister) |
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103 | return -1; |
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104 | |
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105 | if (!isr) |
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106 | return -1; |
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107 | |
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108 | return dev->parent->ops->int_unregister(dev, index, isr, arg); |
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109 | } |
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110 | |
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111 | int drvmgr_interrupt_clear( |
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112 | struct drvmgr_dev *dev, |
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113 | int index) |
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114 | { |
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115 | if (!dev || !dev->parent || !dev->parent->ops->int_clear) |
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116 | return -1; |
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117 | |
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118 | return dev->parent->ops->int_clear(dev, index); |
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119 | } |
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120 | |
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121 | int drvmgr_interrupt_unmask( |
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122 | struct drvmgr_dev *dev, |
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123 | int index) |
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124 | { |
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125 | if (!dev || !dev->parent || !dev->parent->ops->int_unmask) |
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126 | return -1; |
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127 | |
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128 | return dev->parent->ops->int_unmask(dev, index); |
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129 | } |
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130 | |
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131 | int drvmgr_interrupt_mask( |
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132 | struct drvmgr_dev *dev, |
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133 | int index) |
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134 | { |
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135 | if (!dev || !dev->parent || !dev->parent->ops->int_mask) |
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136 | return -1; |
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137 | |
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138 | return dev->parent->ops->int_mask(dev, index); |
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139 | } |
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140 | |
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141 | int drvmgr_on_rootbus(struct drvmgr_dev *dev) |
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142 | { |
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143 | if (dev->parent && dev->parent->dev && dev->parent->dev->parent) |
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144 | return 0; |
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145 | else |
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146 | return 1; |
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147 | } |
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