1 | /** |
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2 | * @file |
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3 | * |
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4 | * @ingroup rtems_bsd_rtems |
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5 | * |
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6 | * @brief TODO. |
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7 | */ |
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8 | |
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9 | /* |
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10 | * Copyright (c) 2009-2013 embedded brains GmbH. All rights reserved. |
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11 | * |
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12 | * embedded brains GmbH |
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13 | * Dornierstr. 4 |
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14 | * 82178 Puchheim |
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15 | * Germany |
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16 | * <rtems@embedded-brains.de> |
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17 | * |
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18 | * Redistribution and use in source and binary forms, with or without |
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19 | * modification, are permitted provided that the following conditions |
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20 | * are met: |
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21 | * 1. Redistributions of source code must retain the above copyright |
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22 | * notice, this list of conditions and the following disclaimer. |
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23 | * 2. Redistributions in binary form must reproduce the above copyright |
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24 | * notice, this list of conditions and the following disclaimer in the |
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25 | * documentation and/or other materials provided with the distribution. |
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26 | * |
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27 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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28 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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29 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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30 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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31 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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32 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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33 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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34 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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35 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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36 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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37 | * SUCH DAMAGE. |
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38 | */ |
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39 | |
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40 | #include <machine/rtems-bsd-kernel-space.h> |
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41 | #include <machine/rtems-bsd-thread.h> |
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42 | |
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43 | #include <rtems/bsd/sys/param.h> |
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44 | #include <rtems/bsd/sys/types.h> |
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45 | #include <sys/systm.h> |
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46 | #include <sys/bus.h> |
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47 | #include <sys/kernel.h> |
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48 | #include <sys/module.h> |
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49 | #include <sys/rman.h> |
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50 | #include <sys/malloc.h> |
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51 | |
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52 | #include <rtems/bsd/bsd.h> |
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53 | #include <rtems/irq-extension.h> |
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54 | |
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55 | RTEMS_STATIC_ASSERT(SYS_RES_MEMORY == RTEMS_BSD_RES_MEMORY, RTEMS_BSD_RES_MEMORY); |
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56 | |
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57 | RTEMS_STATIC_ASSERT(SYS_RES_IRQ == RTEMS_BSD_RES_IRQ, RTEMS_BSD_RES_IRQ); |
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58 | |
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59 | static struct rman mem_rman; |
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60 | |
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61 | static struct rman irq_rman; |
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62 | |
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63 | static int |
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64 | nexus_probe(device_t dev) |
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65 | { |
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66 | rtems_status_code status; |
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67 | int err; |
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68 | size_t i; |
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69 | |
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70 | device_set_desc(dev, "RTEMS Nexus device"); |
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71 | |
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72 | status = rtems_interrupt_server_initialize( |
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73 | BSD_TASK_PRIORITY_INTERRUPT, |
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74 | BSD_MINIMUM_TASK_STACK_SIZE, |
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75 | RTEMS_DEFAULT_MODES, |
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76 | RTEMS_DEFAULT_ATTRIBUTES, |
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77 | NULL |
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78 | ); |
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79 | BSD_ASSERT(status == RTEMS_SUCCESSFUL); |
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80 | |
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81 | mem_rman.rm_start = 0; |
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82 | mem_rman.rm_end = ~0UL; |
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83 | mem_rman.rm_type = RMAN_ARRAY; |
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84 | mem_rman.rm_descr = "I/O memory addresses"; |
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85 | err = rman_init(&mem_rman) != 0; |
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86 | BSD_ASSERT(err == 0); |
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87 | err = rman_manage_region(&mem_rman, mem_rman.rm_start, mem_rman.rm_end); |
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88 | BSD_ASSERT(err == 0); |
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89 | |
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90 | irq_rman.rm_start = 0; |
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91 | irq_rman.rm_end = ~0UL; |
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92 | irq_rman.rm_type = RMAN_ARRAY; |
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93 | irq_rman.rm_descr = "Interrupt vectors"; |
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94 | err = rman_init(&irq_rman) != 0; |
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95 | BSD_ASSERT(err == 0); |
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96 | err = rman_manage_region(&irq_rman, irq_rman.rm_start, irq_rman.rm_end); |
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97 | BSD_ASSERT(err == 0); |
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98 | |
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99 | for (i = 0; i < rtems_bsd_nexus_device_count; ++i) { |
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100 | const rtems_bsd_device *nd = &rtems_bsd_nexus_devices[i]; |
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101 | |
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102 | device_add_child(dev, nd->name, nd->unit); |
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103 | } |
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104 | |
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105 | return (0); |
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106 | } |
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107 | |
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108 | static bool |
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109 | nexus_get_start(const rtems_bsd_device *nd, int type, u_long *start) |
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110 | { |
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111 | u_long sr = *start; |
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112 | size_t i; |
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113 | |
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114 | for (i = 0; i < nd->resource_count; ++i) { |
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115 | const rtems_bsd_device_resource *dr = &nd->resources[i]; |
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116 | |
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117 | if (dr->type == type && dr->start_request == sr) { |
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118 | *start = dr->start_actual; |
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119 | |
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120 | return (true); |
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121 | } |
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122 | } |
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123 | |
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124 | return (false); |
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125 | } |
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126 | |
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127 | static struct resource * |
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128 | nexus_alloc_resource(device_t bus, device_t child, int type, int *rid, |
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129 | u_long start, u_long end, u_long count, u_int flags) |
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130 | { |
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131 | struct resource *rv; |
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132 | struct rman *rm; |
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133 | size_t i; |
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134 | |
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135 | switch (type) { |
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136 | case SYS_RES_MEMORY: |
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137 | rm = &mem_rman; |
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138 | break; |
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139 | case SYS_RES_IRQ: |
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140 | rm = &irq_rman; |
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141 | break; |
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142 | default: |
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143 | return (NULL); |
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144 | } |
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145 | |
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146 | for (i = 0; i < rtems_bsd_nexus_device_count; ++i) { |
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147 | const rtems_bsd_device *nd = &rtems_bsd_nexus_devices[i]; |
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148 | |
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149 | if (strcmp(device_get_name(child), nd->name) == 0 |
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150 | && device_get_unit(child) == nd->unit) { |
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151 | if (!nexus_get_start(nd, type, &start)) { |
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152 | return (NULL); |
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153 | }; |
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154 | } else { |
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155 | return (NULL); |
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156 | } |
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157 | } |
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158 | |
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159 | rv = rman_reserve_resource(rm, start, end, count, flags, child); |
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160 | if (rv != NULL) { |
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161 | rman_set_rid(rv, *rid); |
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162 | rman_set_bushandle(rv, rman_get_start(rv)); |
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163 | } |
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164 | |
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165 | return (rv); |
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166 | } |
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167 | |
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168 | static int |
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169 | nexus_release_resource(device_t bus, device_t child, int type, int rid, |
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170 | struct resource *res) |
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171 | { |
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172 | return (rman_release_resource(res)); |
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173 | } |
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174 | |
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175 | struct nexus_intr { |
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176 | driver_filter_t *filt; |
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177 | driver_intr_t *intr; |
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178 | void *arg; |
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179 | }; |
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180 | |
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181 | static void |
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182 | nexus_intr_with_filter(void *arg) |
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183 | { |
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184 | struct nexus_intr *ni; |
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185 | int status; |
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186 | |
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187 | ni = arg; |
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188 | |
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189 | status = (*ni->filt)(ni->arg); |
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190 | if ((status & FILTER_SCHEDULE_THREAD) != 0) { |
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191 | (*ni->intr)(ni->arg); |
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192 | } |
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193 | } |
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194 | |
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195 | static int |
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196 | nexus_setup_intr(device_t dev, device_t child, struct resource *res, int flags, |
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197 | driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep) |
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198 | { |
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199 | int err; |
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200 | struct nexus_intr *ni; |
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201 | |
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202 | ni = malloc(sizeof(*ni), M_TEMP, M_WAITOK); |
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203 | if (ni != NULL) { |
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204 | rtems_status_code sc; |
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205 | rtems_interrupt_handler rh; |
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206 | void *ra; |
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207 | |
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208 | ni->filt = filt; |
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209 | ni->intr = intr; |
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210 | ni->arg = arg; |
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211 | |
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212 | *cookiep = ni; |
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213 | |
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214 | if (filt == NULL) { |
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215 | rh = intr; |
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216 | ra = arg; |
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217 | } else { |
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218 | rh = nexus_intr_with_filter; |
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219 | ra = ni; |
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220 | } |
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221 | |
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222 | sc = rtems_interrupt_server_handler_install(RTEMS_ID_NONE, |
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223 | rman_get_start(res), device_get_nameunit(child), |
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224 | RTEMS_INTERRUPT_UNIQUE, rh, ra); |
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225 | if (sc == RTEMS_SUCCESSFUL) { |
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226 | err = 0; |
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227 | } else { |
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228 | free(ni, M_TEMP); |
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229 | |
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230 | err = EINVAL; |
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231 | } |
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232 | } else { |
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233 | err = ENOMEM; |
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234 | } |
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235 | |
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236 | return (err); |
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237 | } |
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238 | |
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239 | static int |
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240 | nexus_teardown_intr(device_t dev, device_t child, struct resource *res, |
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241 | void *cookie) |
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242 | { |
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243 | int err; |
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244 | struct nexus_intr *ni; |
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245 | rtems_status_code sc; |
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246 | rtems_interrupt_handler rh; |
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247 | void *ra; |
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248 | |
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249 | ni = cookie; |
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250 | |
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251 | if (ni->filt == NULL) { |
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252 | rh = ni->intr; |
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253 | ra = ni->arg; |
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254 | } else { |
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255 | rh = nexus_intr_with_filter; |
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256 | ra = ni->arg; |
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257 | } |
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258 | |
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259 | sc = rtems_interrupt_server_handler_install(RTEMS_ID_NONE, |
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260 | rman_get_start(res), device_get_nameunit(child), |
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261 | RTEMS_INTERRUPT_UNIQUE, rh, ra); |
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262 | err = sc == RTEMS_SUCCESSFUL ? 0 : EINVAL; |
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263 | |
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264 | return (err); |
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265 | } |
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266 | |
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267 | static device_method_t nexus_methods[] = { |
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268 | /* Device interface */ |
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269 | DEVMETHOD(device_probe, nexus_probe), |
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270 | DEVMETHOD(device_attach, bus_generic_attach), |
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271 | DEVMETHOD(device_detach, bus_generic_detach), |
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272 | DEVMETHOD(device_shutdown, bus_generic_shutdown), |
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273 | DEVMETHOD(device_suspend, bus_generic_suspend), |
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274 | DEVMETHOD(device_resume, bus_generic_resume), |
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275 | |
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276 | /* Bus interface */ |
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277 | DEVMETHOD(bus_print_child, bus_generic_print_child), |
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278 | DEVMETHOD(bus_add_child, bus_generic_add_child), |
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279 | DEVMETHOD(bus_alloc_resource, nexus_alloc_resource), |
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280 | DEVMETHOD(bus_release_resource, nexus_release_resource), |
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281 | DEVMETHOD(bus_setup_intr, nexus_setup_intr), |
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282 | DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), |
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283 | |
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284 | { 0, 0 } |
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285 | }; |
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286 | |
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287 | static driver_t nexus_driver = { |
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288 | .name = "nexus", |
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289 | .methods = nexus_methods, |
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290 | .size = 0 |
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291 | }; |
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292 | |
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293 | static devclass_t nexus_devclass; |
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294 | |
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295 | DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0); |
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