1 | /* |
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2 | * Copyright (c) 2011 Aeroflex Gaisler |
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3 | * |
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4 | * BSD license: |
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5 | * |
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6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
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7 | * of this software and associated documentation files (the "Software"), to deal |
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8 | * in the Software without restriction, including without limitation the rights |
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9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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10 | * copies of the Software, and to permit persons to whom the Software is |
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11 | * furnished to do so, subject to the following conditions: |
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12 | * |
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13 | * The above copyright notice and this permission notice shall be included in |
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14 | * all copies or substantial portions of the Software. |
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15 | * |
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16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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22 | * THE SOFTWARE. |
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23 | */ |
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24 | |
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25 | |
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26 | #include <asm-leon/amba.h> |
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27 | #undef AMBA_TYPE_AHBIO_ADDR |
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28 | #include <asm-leon/lambapp.h> |
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29 | #include <string.h> |
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30 | |
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31 | #define AMBA_CONF_AREA 0xff000 |
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32 | #define AMBA_AHB_SLAVE_CONF_AREA (1 << 11) |
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33 | #define AMBA_APB_SLAVES 16 |
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34 | |
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35 | #ifdef PDEBUG |
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36 | #define DPRINTF(p) printf p |
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37 | #else |
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38 | #define DPRINTF(p) |
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39 | #endif |
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40 | |
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41 | unsigned int |
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42 | ambapp_addr_from (struct ambapp_mmap *mmaps, unsigned int address) |
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43 | { |
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44 | /* no translation? */ |
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45 | if (!mmaps) |
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46 | return address; |
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47 | |
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48 | while (mmaps->size) |
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49 | { |
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50 | if ((address >= mmaps->remote_adr) |
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51 | && (address <= (mmaps->remote_adr + (mmaps->size - 1)))) |
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52 | { |
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53 | return (address - mmaps->remote_adr) + mmaps->local_adr; |
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54 | } |
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55 | mmaps++; |
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56 | } |
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57 | return 1; |
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58 | } |
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59 | |
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60 | |
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61 | static void |
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62 | ambapp_ahb_dev_init (unsigned int ioarea, |
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63 | struct ambapp_mmap *mmaps, |
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64 | struct ambapp_pnp_ahb *ahb, struct ambapp_dev_hdr *dev) |
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65 | { |
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66 | int bar; |
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67 | struct ambapp_ahb_info *ahb_info; |
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68 | unsigned int addr, mask, mbar; |
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69 | |
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70 | /* Setup device struct */ |
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71 | dev->vendor = ambapp_pnp_vendor (ahb->id); |
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72 | dev->device = ambapp_pnp_device (ahb->id); |
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73 | ahb_info = dev->devinfo; |
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74 | ahb_info->ver = ambapp_pnp_ver (ahb->id); |
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75 | ahb_info->irq = ambapp_pnp_irq (ahb->id); |
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76 | ahb_info->custom[0] = (unsigned int) ahb->custom[0]; |
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77 | ahb_info->custom[1] = (unsigned int) ahb->custom[1]; |
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78 | ahb_info->custom[2] = (unsigned int) ahb->custom[2]; |
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79 | |
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80 | DPRINTF (("+AHB device %d:%d\n", dev->device, dev->vendor)); |
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81 | |
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82 | /* Memory BARs */ |
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83 | for (bar = 0; bar < 4; bar++) |
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84 | { |
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85 | mbar = ahb->mbar[bar]; |
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86 | if (mbar == 0) |
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87 | { |
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88 | addr = 0; |
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89 | mask = 0; |
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90 | } |
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91 | else |
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92 | { |
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93 | addr = ambapp_pnp_start (mbar); |
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94 | if (ambapp_pnp_mbar_type (mbar) == AMBA_TYPE_AHBIO) |
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95 | { |
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96 | /* AHB I/O area is releative IO_AREA */ |
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97 | addr = AMBA_TYPE_AHBIO_ADDR (addr, ioarea); |
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98 | mask = |
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99 | (((unsigned int) (ambapp_pnp_mbar_mask ((~mbar)) << 8) | |
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100 | 0xff)) + 1; |
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101 | } |
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102 | else |
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103 | { |
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104 | /* AHB memory area, absolute address */ |
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105 | addr = ambapp_addr_from (mmaps, addr); |
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106 | mask = |
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107 | (~((unsigned int) (ambapp_pnp_mbar_mask (mbar) << 20))) + 1; |
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108 | } |
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109 | } |
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110 | ahb_info->start[bar] = addr; |
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111 | ahb_info->mask[bar] = mask; |
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112 | } |
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113 | } |
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114 | |
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115 | static void |
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116 | ambapp_apb_dev_init (unsigned int base, |
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117 | struct ambapp_mmap *mmaps, |
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118 | struct ambapp_pnp_apb *apb, struct ambapp_dev_hdr *dev) |
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119 | { |
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120 | struct ambapp_apb_info *apb_info; |
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121 | |
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122 | /* Setup device struct */ |
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123 | dev->vendor = ambapp_pnp_vendor (apb->id); |
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124 | dev->device = ambapp_pnp_device (apb->id); |
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125 | apb_info = dev->devinfo; |
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126 | apb_info->ver = ambapp_pnp_ver (apb->id); |
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127 | apb_info->irq = ambapp_pnp_irq (apb->id); |
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128 | apb_info->start = ambapp_pnp_apb_start (apb->iobar, base); |
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129 | apb_info->mask = ambapp_pnp_apb_mask (apb->iobar); |
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130 | |
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131 | DPRINTF (("+APB device %d:%d\n", dev->device, dev->vendor)); |
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132 | |
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133 | |
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134 | } |
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135 | |
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136 | #define MAX_NUM_BUSES 16 |
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137 | static void |
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138 | ambapp_add_scanned_bus (unsigned int *ioareas, unsigned int ioarea) |
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139 | { |
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140 | int i; |
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141 | for (i = 0; i < MAX_NUM_BUSES; i++) |
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142 | { |
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143 | if (ioareas[i] == 0) |
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144 | { |
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145 | ioareas[i] = ioarea; |
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146 | return; |
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147 | } |
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148 | } |
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149 | } |
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150 | |
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151 | static int |
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152 | ambapp_has_been_scanned (unsigned int *ioareas, unsigned int ioarea) |
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153 | { |
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154 | int i; |
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155 | if (!ioareas) |
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156 | return 0; |
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157 | |
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158 | for (i = 0; i < MAX_NUM_BUSES; i++) |
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159 | { |
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160 | if (ioareas[i] == 0) |
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161 | { |
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162 | break; |
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163 | } |
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164 | else if (ioareas[i] == ioarea) |
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165 | { |
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166 | return 1; |
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167 | } |
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168 | } |
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169 | return 0; |
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170 | } |
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171 | |
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172 | static int |
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173 | ambapp_find (unsigned int ioarea, |
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174 | struct ambapp_dev_hdr *parent, |
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175 | struct ambapp_mmap *mmaps, |
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176 | void *internal, |
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177 | int (*find_match) (struct ambapp_dev_hdr * dev, void *arg), |
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178 | void *arg, int vendor, int device) |
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179 | { |
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180 | struct ambapp_pnp_ahb *ahb, ahb_buf; |
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181 | struct ambapp_pnp_apb *apb, apb_buf; |
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182 | struct ambapp_dev_hdr *dev, *prev, *prevapb, *apbdev; |
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183 | struct ambapp_ahb_info *ahb_info; |
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184 | int maxloops = 64; |
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185 | unsigned int apbbase, bridge_address; |
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186 | int i, j; |
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187 | |
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188 | DPRINTF (("Scan at 0x%08x\n", ioarea)); |
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189 | |
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190 | if (parent) |
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191 | { |
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192 | /* scan first bus for 64 devices, rest for 16 devices */ |
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193 | maxloops = 16; |
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194 | } |
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195 | else |
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196 | { |
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197 | if (internal) |
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198 | { |
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199 | ambapp_add_scanned_bus (internal, ioarea); |
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200 | } |
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201 | } |
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202 | |
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203 | prev = parent; |
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204 | |
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205 | /* AHB MASTERS */ |
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206 | ahb = (struct ambapp_pnp_ahb *) (ioarea | AMBA_CONF_AREA); |
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207 | for (i = 0; i < maxloops; i++) |
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208 | { |
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209 | memcpy (&ahb_buf, ahb, sizeof (struct ambapp_pnp_ahb)); |
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210 | if (ahb_buf.id != 0) |
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211 | { |
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212 | struct ambapp_dev_hdr _dev; |
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213 | struct ambapp_ahb_info _ahb; |
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214 | memset (&_dev, 0, sizeof (_dev)); |
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215 | memset (&_ahb, 0, sizeof (_ahb)); |
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216 | _dev.devinfo = &_ahb; |
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217 | _dev.dev_type = DEV_AHB_MST; |
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218 | dev = &_dev; |
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219 | |
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220 | ambapp_ahb_dev_init (ioarea, mmaps, &ahb_buf, dev); |
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221 | |
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222 | DPRINTF ((" = test %d:%d == %d:%d\n", vendor, device, dev->vendor, |
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223 | dev->device)); |
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224 | |
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225 | if (vendor == dev->vendor && |
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226 | device == dev->device && find_match (dev, arg)) |
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227 | { |
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228 | return 1; |
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229 | } |
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230 | } |
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231 | ahb++; |
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232 | } |
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233 | |
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234 | |
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235 | /* AHB SLAVES */ |
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236 | ahb = |
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237 | (struct ambapp_pnp_ahb *) (ioarea | AMBA_CONF_AREA | |
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238 | AMBA_AHB_SLAVE_CONF_AREA); |
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239 | for (i = 0; i < maxloops; i++) |
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240 | { |
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241 | memcpy (&ahb_buf, ahb, sizeof (struct ambapp_pnp_ahb)); |
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242 | if (ahb_buf.id != 0) |
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243 | { |
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244 | struct ambapp_dev_hdr _dev; |
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245 | struct ambapp_ahb_info _ahb; |
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246 | memset (&_dev, 0, sizeof (_dev)); |
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247 | memset (&_ahb, 0, sizeof (_ahb)); |
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248 | _dev.devinfo = &_ahb; |
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249 | _dev.dev_type = DEV_AHB_MST; |
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250 | dev = &_dev; |
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251 | |
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252 | ambapp_ahb_dev_init (ioarea, mmaps, &ahb_buf, dev); |
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253 | |
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254 | DPRINTF ((" = test %d:%d == %d:%d\n", vendor, device, dev->vendor, |
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255 | dev->device)); |
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256 | |
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257 | if (vendor == dev->vendor && |
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258 | device == dev->device && find_match (dev, arg)) |
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259 | { |
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260 | return 1; |
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261 | } |
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262 | |
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263 | /* Is it a AHB/AHB Bridge ? */ |
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264 | if ((dev->device == GAISLER_AHB2AHB) |
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265 | && (dev->vendor == VENDOR_GAISLER)) |
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266 | { |
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267 | /* AHB/AHB Bridge Found, recurse down the Bridge */ |
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268 | ahb_info = dev->devinfo; |
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269 | if (ahb_info->ver) |
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270 | { |
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271 | bridge_address = |
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272 | ambapp_addr_from (mmaps, ahb_info->custom[1]); |
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273 | |
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274 | DPRINTF (("+(AHBAHB:0x%x)\n", bridge_address)); |
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275 | |
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276 | /* Makes sure bus only scanned once */ |
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277 | if (internal == 0 |
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278 | || ambapp_has_been_scanned (internal, |
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279 | bridge_address) == NULL) |
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280 | { |
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281 | if (internal) |
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282 | ambapp_add_scanned_bus (internal, bridge_address); |
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283 | |
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284 | if (ambapp_find (bridge_address, dev, mmaps, internal, |
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285 | find_match, arg, vendor, device)) |
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286 | return 1; |
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287 | } |
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288 | } |
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289 | } |
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290 | else if ((dev->device == GAISLER_APBMST) |
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291 | && (dev->vendor == VENDOR_GAISLER)) |
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292 | { |
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293 | /* AHB/APB Bridge Found, add the APB devices to this AHB Slave's children */ |
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294 | prevapb = dev; |
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295 | ahb_info = dev->devinfo; |
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296 | apbbase = ahb_info->start[0]; |
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297 | apb = (struct ambapp_pnp_apb *) (apbbase | AMBA_CONF_AREA); |
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298 | for (j = 0; j < AMBA_APB_SLAVES; j++) |
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299 | { |
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300 | memcpy (&apb_buf, apb, sizeof (struct ambapp_pnp_apb)); |
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301 | if (apb_buf.id) |
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302 | { |
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303 | struct ambapp_dev_hdr _apbdev; |
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304 | struct ambapp_apb_info _apb; |
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305 | memset (&_apbdev, 0, sizeof (_apbdev)); |
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306 | memset (&_apb, 0, sizeof (_apb)); |
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307 | _apbdev.devinfo = &_apb; |
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308 | _apbdev.dev_type = DEV_APB_SLV; |
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309 | apbdev = &_apbdev; |
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310 | |
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311 | ambapp_apb_dev_init (apbbase, mmaps, &apb_buf, apbdev); |
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312 | |
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313 | DPRINTF ((" = test %d:%d == %d:%d\n", vendor, device, |
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314 | apbdev->vendor, apbdev->device)); |
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315 | |
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316 | if (vendor == apbdev->vendor && |
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317 | device == apbdev->device && |
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318 | find_match (apbdev, arg)) |
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319 | { |
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320 | |
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321 | return 1; |
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322 | } |
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323 | } |
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324 | apb++; |
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325 | } |
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326 | } |
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327 | } |
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328 | ahb++; |
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329 | } |
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330 | |
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331 | if (parent == NULL) |
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332 | { |
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333 | /*free(internal); */ |
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334 | } |
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335 | |
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336 | return 0; |
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337 | } |
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338 | |
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339 | struct ambapp_dev_find_match_arg |
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340 | { |
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341 | int index; |
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342 | int count; |
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343 | int type; |
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344 | void *dev; |
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345 | }; |
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346 | |
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347 | /* AMBA PP find routines */ |
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348 | static int |
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349 | ambapp_dev_find_match (struct ambapp_dev_hdr *dev, void *arg) |
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350 | { |
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351 | struct ambapp_dev_find_match_arg *p = arg; |
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352 | |
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353 | if (p->index == 0) |
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354 | { |
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355 | /* Found controller, stop */ |
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356 | if (p->type == DEV_APB_SLV) |
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357 | { |
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358 | *(struct ambapp_apb_info *) p->dev = |
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359 | *(struct ambapp_apb_info *) dev->devinfo; |
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360 | p->dev = ((struct ambapp_apb_info *) p->dev) + 1; |
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361 | } |
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362 | else |
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363 | { |
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364 | *(struct ambapp_ahb_info *) p->dev = |
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365 | *(struct ambapp_ahb_info *) dev->devinfo; |
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366 | p->dev = ((struct ambapp_ahb_info *) p->dev) + 1; |
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367 | } |
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368 | p->count--; |
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369 | if (p->count < 1) |
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370 | return 1; |
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371 | } |
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372 | else |
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373 | { |
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374 | p->index--; |
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375 | } |
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376 | return 0; |
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377 | } |
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378 | |
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379 | static int |
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380 | find_apbslvs_next (int vendor, int device, struct ambapp_apb_info *dev, |
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381 | int index, int maxno) |
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382 | { |
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383 | struct ambapp_dev_find_match_arg arg; |
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384 | unsigned int busses[MAX_NUM_BUSES]; |
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385 | memset (busses, 0, sizeof (busses)); |
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386 | |
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387 | arg.index = index; |
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388 | arg.count = maxno; |
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389 | arg.type = DEV_APB_SLV; /* APB */ |
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390 | arg.dev = dev; |
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391 | |
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392 | ambapp_find (LEON3_IO_AREA, NULL, NULL, &busses, |
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393 | ambapp_dev_find_match, &arg, vendor, device); |
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394 | |
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395 | return maxno - arg.count; |
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396 | } |
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397 | |
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398 | int |
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399 | find_apbslv (int vendor, int device, struct ambapp_apb_info *dev) |
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400 | { |
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401 | return find_apbslvs_next (vendor, device, dev, 0, 1); |
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402 | } |
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403 | |
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404 | struct ambapp_dev_hdr *ambapp_root = NULL; |
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405 | unsigned int busses[MAX_NUM_BUSES]; |
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406 | extern unsigned int console; |
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407 | extern unsigned int rtc; |
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408 | extern unsigned int irqmp; |
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409 | |
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410 | void |
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411 | pnpinit (void) |
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412 | { |
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413 | struct ambapp_apb_info dev; |
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414 | int n; |
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415 | if ((n = find_apbslv (VENDOR_GAISLER, GAISLER_APBUART, &dev)) == 1) |
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416 | { |
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417 | console = dev.start; |
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418 | DPRINTF (("Found abuart at 0x%x\n", console)); |
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419 | } |
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420 | if ((n = find_apbslv (VENDOR_GAISLER, GAISLER_GPTIMER, &dev)) == 1) |
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421 | { |
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422 | rtc = dev.start + 0x10; |
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423 | DPRINTF (("Found rtc at 0x%x\n", rtc)); |
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424 | } |
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425 | if ((n = find_apbslv (VENDOR_GAISLER, GAISLER_IRQMP, &dev)) == 1) |
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426 | { |
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427 | irqmp = dev.start; |
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428 | DPRINTF (("Found irqmp at 0x%x\n", rtc)); |
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429 | } |
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430 | } |
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