1 | /* LEON2 GRLIB AMBA Plug & Play bus driver. |
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2 | * |
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3 | * COPYRIGHT (c) 2008. |
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4 | * Cobham Gaisler AB. |
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5 | * |
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6 | * This is driver is a wrapper for the general AMBA Plug & Play bus |
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7 | * driver. This is a bus driver for LEON2-GRLIB systems providing a |
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8 | * AMBA Plug & Play bus, the parent bus must be a LEON2 hardcoded |
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9 | * Bus. All IRQs must be routed to this bus driver in order for IRQs |
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10 | * to work. The PnP information is used to extract IRQs and base |
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11 | * register addresses. |
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12 | * |
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13 | * The license and distribution terms for this file may be |
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14 | * found in the file LICENSE in this distribution or at |
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15 | * http://www.rtems.org/license/LICENSE. |
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16 | */ |
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17 | |
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18 | #include <bsp.h> |
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19 | |
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20 | #ifdef LEON2 |
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21 | #include <stdlib.h> |
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22 | #include <stdio.h> |
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23 | #include <libcpu/access.h> |
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24 | #include <drvmgr/drvmgr.h> |
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25 | #include <drvmgr/ambapp_bus.h> |
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26 | #include <drvmgr/leon2_amba_bus.h> |
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27 | |
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28 | #define DBG(args...) |
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29 | |
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30 | int ambapp_leon2_int_register( |
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31 | struct drvmgr_dev *dev, |
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32 | int index, |
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33 | const char *info, |
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34 | drvmgr_isr isr, |
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35 | void *arg); |
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36 | int ambapp_leon2_int_unregister( |
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37 | struct drvmgr_dev *dev, |
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38 | int index, |
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39 | drvmgr_isr isr, |
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40 | void *arg); |
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41 | int ambapp_leon2_int_clear( |
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42 | struct drvmgr_dev *dev, |
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43 | int index); |
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44 | int ambapp_leon2_int_mask( |
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45 | struct drvmgr_dev *dev, |
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46 | int irq); |
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47 | int ambapp_leon2_int_unmask( |
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48 | struct drvmgr_dev *dev, |
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49 | int irq); |
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50 | int ambapp_leon2_get_params( |
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51 | struct drvmgr_dev *dev, |
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52 | struct drvmgr_bus_params *params); |
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53 | |
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54 | int ambapp_leon2_init1(struct drvmgr_dev *dev); |
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55 | int ambapp_leon2_init2(struct drvmgr_dev *dev); |
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56 | int ambapp_leon2_remove(struct drvmgr_dev *dev); |
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57 | void ambapp_leon2_register(void); |
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58 | |
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59 | /* READ/WRITE access to SpaceWire target over RMAP */ |
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60 | void *ambapp_leon2_rw_arg(struct drvmgr_dev *dev); |
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61 | |
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62 | struct ambappl2_priv { |
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63 | struct ambapp_bus abus; |
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64 | struct ambapp_config config; |
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65 | }; |
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66 | |
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67 | struct ambapp_ops ambapp_leon2_ops = { |
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68 | .int_register = ambapp_leon2_int_register, |
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69 | .int_unregister = ambapp_leon2_int_unregister, |
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70 | .int_clear = ambapp_leon2_int_clear, |
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71 | .int_mask = ambapp_leon2_int_mask, |
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72 | .int_unmask = ambapp_leon2_int_unmask, |
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73 | .get_params = ambapp_leon2_get_params |
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74 | }; |
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75 | |
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76 | struct drvmgr_func ambapp_leon2_funcs[] = { |
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77 | DRVMGR_FUNC(AMBAPP_RW_ARG, ambapp_leon2_rw_arg), |
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78 | |
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79 | DRVMGR_FUNC(AMBAPP_R8, _ld8), |
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80 | DRVMGR_FUNC(AMBAPP_R16, _ld16), |
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81 | DRVMGR_FUNC(AMBAPP_R32, _ld32), |
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82 | DRVMGR_FUNC(AMBAPP_R64, _ld64), |
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83 | |
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84 | DRVMGR_FUNC(AMBAPP_W8, _st8), |
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85 | DRVMGR_FUNC(AMBAPP_W16, _st16), |
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86 | DRVMGR_FUNC(AMBAPP_W32, _st32), |
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87 | DRVMGR_FUNC(AMBAPP_W64, _st64), |
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88 | |
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89 | DRVMGR_FUNC(AMBAPP_RMEM, memcpy), |
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90 | DRVMGR_FUNC(AMBAPP_WMEM, memcpy), |
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91 | |
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92 | DRVMGR_FUNC_END |
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93 | }; |
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94 | |
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95 | struct drvmgr_drv_ops ambapp_ops = { |
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96 | .init = {ambapp_leon2_init1, ambapp_leon2_init2, NULL, NULL}, |
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97 | .remove = ambapp_leon2_remove, |
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98 | .info = NULL, |
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99 | }; |
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100 | |
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101 | struct leon2_amba_dev_id ambapp_leon2_ids[] = { |
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102 | {LEON2_AMBA_AMBAPP_ID}, |
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103 | {0} |
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104 | }; |
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105 | |
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106 | struct leon2_amba_drv_info ambapp_bus_drv_leon2 = { |
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107 | { |
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108 | DRVMGR_OBJ_DRV, /* Driver */ |
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109 | NULL, /* Next driver */ |
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110 | NULL, /* Device list */ |
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111 | DRIVER_LEON2_AMBA_AMBAPP, /* Driver ID */ |
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112 | "AMBAPP_LEON2_DRV", /* Driver Name */ |
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113 | DRVMGR_BUS_TYPE_LEON2_AMBA, /* Bus Type */ |
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114 | &ambapp_ops, |
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115 | NULL, /* Funcs */ |
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116 | 0, |
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117 | sizeof(struct ambappl2_priv), /* Let DrvMgr allocate priv */ |
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118 | }, |
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119 | &ambapp_leon2_ids[0] |
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120 | }; |
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121 | |
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122 | void ambapp_leon2_register(void) |
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123 | { |
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124 | drvmgr_drv_register(&ambapp_bus_drv_leon2.general); |
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125 | } |
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126 | |
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127 | /* Function called from a hard configuration */ |
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128 | int ambapp_leon2_init1(struct drvmgr_dev *dev) |
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129 | { |
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130 | union drvmgr_key_value *value; |
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131 | struct ambappl2_priv *priv = dev->priv; |
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132 | struct leon2_amba_dev_info *devinfo; |
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133 | struct ambapp_config *config; |
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134 | unsigned int ioarea; |
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135 | unsigned int freq_hz; |
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136 | LEON_Register_Map *regs; |
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137 | |
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138 | dev->name = "LEON2 AMBA PnP"; |
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139 | |
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140 | if (!priv) |
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141 | return DRVMGR_NOMEM; |
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142 | |
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143 | config = &priv->config; |
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144 | config->abus = &priv->abus; |
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145 | config->ops = &ambapp_leon2_ops; |
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146 | config->maps_up = DRVMGR_TRANSLATE_ONE2ONE; |
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147 | config->maps_down = DRVMGR_TRANSLATE_ONE2ONE; |
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148 | config->funcs = ambapp_leon2_funcs; |
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149 | config->bus_type = DRVMGR_BUS_TYPE_LEON2_AMBA; |
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150 | |
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151 | /* Get AMBA PnP Area from REG0 */ |
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152 | devinfo = (struct leon2_amba_dev_info *)dev->businfo; |
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153 | ioarea = devinfo->reg_base; |
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154 | |
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155 | /* Scan AMBA PnP Bus. ABUS has already been cleared with memset() */ |
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156 | ambapp_scan(&priv->abus, ioarea, NULL, NULL); |
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157 | |
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158 | /* Try to get Configuration from resource configuration */ |
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159 | |
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160 | value = drvmgr_dev_key_get(dev, "busFreq", KEY_TYPE_INT); |
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161 | if (value) { |
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162 | /* Set frequency of AMBA bus if specified by user. The frequency |
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163 | * must be for AHB bus which IOAREA matches (AHB bus 0). |
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164 | */ |
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165 | freq_hz = value->i; |
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166 | } else { |
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167 | /* Get Bus/LEON2 Frequency from timer prescaler, |
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168 | * the hardcoded address is used to get to timer |
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169 | */ |
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170 | regs = (LEON_Register_Map *) 0x80000000; |
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171 | freq_hz = (regs->Scaler_Reload + 1) * 1000 * 1000; |
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172 | } |
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173 | /* Note that this can be overrided by a driver on the AMBA PnP bus.*/ |
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174 | ambapp_freq_init(&priv->abus, NULL, freq_hz); |
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175 | |
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176 | value = drvmgr_dev_key_get(dev, "drvRes", KEY_TYPE_POINTER); |
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177 | if (!value) { |
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178 | DBG("ambapp_leon2_init1: Failed getting resource drvRes\n"); |
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179 | config->resources = NULL; |
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180 | } else { |
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181 | DBG("ambapp_leon2_init1: drvRes: 0x%08x\n", (unsigned int)value->ptr); |
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182 | config->resources = (struct drvmgr_bus_res *)value->ptr; |
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183 | } |
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184 | |
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185 | /* Initialize the AMBA Bus */ |
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186 | return ambapp_bus_register(dev, config); |
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187 | } |
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188 | |
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189 | int ambapp_leon2_init2(struct drvmgr_dev *dev) |
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190 | { |
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191 | return 0; |
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192 | } |
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193 | |
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194 | int ambapp_leon2_remove(struct drvmgr_dev *dev) |
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195 | { |
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196 | return 0; |
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197 | } |
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198 | |
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199 | void *ambapp_leon2_rw_arg(struct drvmgr_dev *dev) |
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200 | { |
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201 | return dev; /* No argument really needed, by for debug */ |
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202 | } |
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203 | |
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204 | int ambapp_leon2_int_register |
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205 | ( |
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206 | struct drvmgr_dev *dev, |
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207 | int index, |
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208 | const char *info, |
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209 | drvmgr_isr isr, |
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210 | void *arg |
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211 | ) |
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212 | { |
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213 | /* Let LEON2 bus handle interrupt requests */ |
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214 | return drvmgr_interrupt_register(dev->parent->dev, index, info, isr, arg); |
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215 | } |
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216 | |
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217 | int ambapp_leon2_int_unregister |
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218 | ( |
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219 | struct drvmgr_dev *dev, |
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220 | int index, |
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221 | drvmgr_isr isr, |
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222 | void *arg |
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223 | ) |
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224 | { |
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225 | /* Let LEON2 bus handle interrupt requests */ |
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226 | return drvmgr_interrupt_unregister(dev->parent->dev, index, isr, arg); |
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227 | } |
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228 | |
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229 | int ambapp_leon2_int_clear |
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230 | ( |
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231 | struct drvmgr_dev *dev, |
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232 | int index |
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233 | ) |
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234 | { |
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235 | /* Let LEON2 bus handle interrupt requests */ |
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236 | return drvmgr_interrupt_clear(dev->parent->dev, index); |
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237 | } |
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238 | |
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239 | int ambapp_leon2_int_mask |
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240 | ( |
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241 | struct drvmgr_dev *dev, |
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242 | int index |
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243 | ) |
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244 | { |
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245 | /* Let LEON2 bus handle interrupt requests */ |
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246 | return drvmgr_interrupt_mask(dev->parent->dev, index); |
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247 | } |
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248 | |
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249 | int ambapp_leon2_int_unmask |
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250 | ( |
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251 | struct drvmgr_dev *dev, |
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252 | int index |
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253 | ) |
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254 | { |
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255 | /* Let LEON2 bus handle interrupt requests */ |
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256 | return drvmgr_interrupt_unmask(dev->parent->dev, index); |
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257 | } |
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258 | |
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259 | int ambapp_leon2_get_params(struct drvmgr_dev *dev, struct drvmgr_bus_params *params) |
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260 | { |
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261 | params->dev_prefix = ""; |
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262 | return 0; |
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263 | } |
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264 | |
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265 | #endif |
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