1 | #include <machine/rtems-bsd-kernel-space.h> |
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2 | |
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3 | /*- |
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4 | * Copyright (c) 2013 Nathan Whitehorn |
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5 | * All rights reserved. |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without |
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8 | * modification, are permitted provided that the following conditions |
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9 | * are met: |
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10 | * 1. Redistributions of source code must retain the above copyright |
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11 | * notice, this list of conditions and the following disclaimer. |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * |
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16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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17 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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20 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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22 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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26 | * SUCH DAMAGE. |
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27 | */ |
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28 | |
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29 | #include <sys/cdefs.h> |
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30 | __FBSDID("$FreeBSD$"); |
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31 | #include <rtems/bsd/sys/param.h> |
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32 | #include <sys/systm.h> |
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33 | #include <sys/module.h> |
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34 | #include <sys/bus.h> |
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35 | #include <sys/conf.h> |
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36 | #include <sys/kernel.h> |
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37 | #include <sys/rman.h> |
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38 | |
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39 | #include <dev/ofw/openfirm.h> |
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40 | #include <dev/ofw/ofw_bus.h> |
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41 | #include <dev/ofw/ofw_bus_subr.h> |
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42 | |
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43 | #include <dev/fdt/simplebus.h> |
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44 | |
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45 | /* |
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46 | * Bus interface. |
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47 | */ |
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48 | static int simplebus_probe(device_t dev); |
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49 | static int simplebus_attach(device_t dev); |
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50 | static struct resource *simplebus_alloc_resource(device_t, device_t, int, |
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51 | int *, rman_res_t, rman_res_t, rman_res_t, u_int); |
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52 | static void simplebus_probe_nomatch(device_t bus, device_t child); |
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53 | static int simplebus_print_child(device_t bus, device_t child); |
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54 | static device_t simplebus_add_child(device_t dev, u_int order, |
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55 | const char *name, int unit); |
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56 | static struct resource_list *simplebus_get_resource_list(device_t bus, |
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57 | device_t child); |
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58 | /* |
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59 | * ofw_bus interface |
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60 | */ |
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61 | static const struct ofw_bus_devinfo *simplebus_get_devinfo(device_t bus, |
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62 | device_t child); |
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63 | |
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64 | /* |
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65 | * local methods |
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66 | */ |
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67 | |
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68 | static int simplebus_fill_ranges(phandle_t node, |
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69 | struct simplebus_softc *sc); |
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70 | |
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71 | /* |
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72 | * Driver methods. |
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73 | */ |
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74 | static device_method_t simplebus_methods[] = { |
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75 | /* Device interface */ |
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76 | DEVMETHOD(device_probe, simplebus_probe), |
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77 | DEVMETHOD(device_attach, simplebus_attach), |
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78 | DEVMETHOD(device_detach, bus_generic_detach), |
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79 | DEVMETHOD(device_shutdown, bus_generic_shutdown), |
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80 | DEVMETHOD(device_suspend, bus_generic_suspend), |
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81 | DEVMETHOD(device_resume, bus_generic_resume), |
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82 | |
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83 | /* Bus interface */ |
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84 | DEVMETHOD(bus_add_child, simplebus_add_child), |
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85 | DEVMETHOD(bus_print_child, simplebus_print_child), |
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86 | DEVMETHOD(bus_probe_nomatch, simplebus_probe_nomatch), |
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87 | DEVMETHOD(bus_read_ivar, bus_generic_read_ivar), |
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88 | DEVMETHOD(bus_write_ivar, bus_generic_write_ivar), |
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89 | DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), |
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90 | DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), |
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91 | DEVMETHOD(bus_alloc_resource, simplebus_alloc_resource), |
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92 | DEVMETHOD(bus_release_resource, bus_generic_release_resource), |
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93 | DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), |
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94 | DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), |
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95 | DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource), |
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96 | DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), |
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97 | DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), |
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98 | DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str), |
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99 | DEVMETHOD(bus_get_resource_list, simplebus_get_resource_list), |
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100 | |
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101 | /* ofw_bus interface */ |
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102 | DEVMETHOD(ofw_bus_get_devinfo, simplebus_get_devinfo), |
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103 | DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), |
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104 | DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), |
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105 | DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), |
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106 | DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), |
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107 | DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), |
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108 | |
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109 | DEVMETHOD_END |
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110 | }; |
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111 | |
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112 | DEFINE_CLASS_0(simplebus, simplebus_driver, simplebus_methods, |
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113 | sizeof(struct simplebus_softc)); |
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114 | |
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115 | static devclass_t simplebus_devclass; |
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116 | EARLY_DRIVER_MODULE(simplebus, ofwbus, simplebus_driver, simplebus_devclass, |
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117 | 0, 0, BUS_PASS_BUS); |
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118 | EARLY_DRIVER_MODULE(simplebus, simplebus, simplebus_driver, simplebus_devclass, |
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119 | 0, 0, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); |
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120 | |
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121 | static int |
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122 | simplebus_probe(device_t dev) |
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123 | { |
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124 | |
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125 | if (!ofw_bus_status_okay(dev)) |
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126 | return (ENXIO); |
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127 | |
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128 | /* |
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129 | * FDT data puts a "simple-bus" compatible string on many things that |
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130 | * have children but aren't really busses in our world. Without a |
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131 | * ranges property we will fail to attach, so just fail to probe too. |
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132 | */ |
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133 | if (!(ofw_bus_is_compatible(dev, "simple-bus") && |
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134 | ofw_bus_has_prop(dev, "ranges")) && |
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135 | (ofw_bus_get_type(dev) == NULL || strcmp(ofw_bus_get_type(dev), |
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136 | "soc") != 0)) |
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137 | return (ENXIO); |
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138 | |
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139 | device_set_desc(dev, "Flattened device tree simple bus"); |
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140 | |
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141 | return (BUS_PROBE_GENERIC); |
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142 | } |
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143 | |
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144 | static int |
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145 | simplebus_attach(device_t dev) |
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146 | { |
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147 | struct simplebus_softc *sc; |
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148 | phandle_t node; |
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149 | |
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150 | sc = device_get_softc(dev); |
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151 | simplebus_init(dev, 0); |
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152 | if (simplebus_fill_ranges(sc->node, sc) < 0) { |
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153 | device_printf(dev, "could not get ranges\n"); |
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154 | return (ENXIO); |
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155 | } |
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156 | |
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157 | /* |
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158 | * In principle, simplebus could have an interrupt map, but ignore that |
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159 | * for now |
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160 | */ |
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161 | |
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162 | for (node = OF_child(sc->node); node > 0; node = OF_peer(node)) |
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163 | simplebus_add_device(dev, node, 0, NULL, -1, NULL); |
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164 | return (bus_generic_attach(dev)); |
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165 | } |
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166 | |
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167 | void |
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168 | simplebus_init(device_t dev, phandle_t node) |
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169 | { |
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170 | struct simplebus_softc *sc; |
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171 | |
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172 | sc = device_get_softc(dev); |
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173 | if (node == 0) |
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174 | node = ofw_bus_get_node(dev); |
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175 | sc->dev = dev; |
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176 | sc->node = node; |
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177 | |
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178 | /* |
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179 | * Some important numbers |
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180 | */ |
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181 | sc->acells = 2; |
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182 | OF_getencprop(node, "#address-cells", &sc->acells, sizeof(sc->acells)); |
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183 | sc->scells = 1; |
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184 | OF_getencprop(node, "#size-cells", &sc->scells, sizeof(sc->scells)); |
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185 | } |
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186 | |
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187 | static int |
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188 | simplebus_fill_ranges(phandle_t node, struct simplebus_softc *sc) |
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189 | { |
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190 | int host_address_cells; |
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191 | cell_t *base_ranges; |
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192 | ssize_t nbase_ranges; |
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193 | int err; |
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194 | int i, j, k; |
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195 | |
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196 | err = OF_searchencprop(OF_parent(node), "#address-cells", |
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197 | &host_address_cells, sizeof(host_address_cells)); |
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198 | if (err <= 0) |
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199 | return (-1); |
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200 | |
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201 | nbase_ranges = OF_getproplen(node, "ranges"); |
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202 | if (nbase_ranges < 0) |
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203 | return (-1); |
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204 | sc->nranges = nbase_ranges / sizeof(cell_t) / |
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205 | (sc->acells + host_address_cells + sc->scells); |
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206 | if (sc->nranges == 0) |
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207 | return (0); |
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208 | |
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209 | sc->ranges = malloc(sc->nranges * sizeof(sc->ranges[0]), |
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210 | M_DEVBUF, M_WAITOK); |
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211 | base_ranges = malloc(nbase_ranges, M_DEVBUF, M_WAITOK); |
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212 | OF_getencprop(node, "ranges", base_ranges, nbase_ranges); |
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213 | |
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214 | for (i = 0, j = 0; i < sc->nranges; i++) { |
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215 | sc->ranges[i].bus = 0; |
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216 | for (k = 0; k < sc->acells; k++) { |
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217 | sc->ranges[i].bus <<= 32; |
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218 | sc->ranges[i].bus |= base_ranges[j++]; |
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219 | } |
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220 | sc->ranges[i].host = 0; |
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221 | for (k = 0; k < host_address_cells; k++) { |
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222 | sc->ranges[i].host <<= 32; |
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223 | sc->ranges[i].host |= base_ranges[j++]; |
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224 | } |
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225 | sc->ranges[i].size = 0; |
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226 | for (k = 0; k < sc->scells; k++) { |
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227 | sc->ranges[i].size <<= 32; |
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228 | sc->ranges[i].size |= base_ranges[j++]; |
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229 | } |
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230 | } |
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231 | |
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232 | free(base_ranges, M_DEVBUF); |
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233 | return (sc->nranges); |
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234 | } |
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235 | |
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236 | struct simplebus_devinfo * |
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237 | simplebus_setup_dinfo(device_t dev, phandle_t node, |
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238 | struct simplebus_devinfo *di) |
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239 | { |
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240 | struct simplebus_softc *sc; |
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241 | struct simplebus_devinfo *ndi; |
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242 | |
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243 | sc = device_get_softc(dev); |
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244 | if (di == NULL) |
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245 | ndi = malloc(sizeof(*ndi), M_DEVBUF, M_WAITOK | M_ZERO); |
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246 | else |
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247 | ndi = di; |
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248 | if (ofw_bus_gen_setup_devinfo(&ndi->obdinfo, node) != 0) { |
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249 | if (di == NULL) |
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250 | free(ndi, M_DEVBUF); |
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251 | return (NULL); |
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252 | } |
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253 | |
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254 | resource_list_init(&ndi->rl); |
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255 | ofw_bus_reg_to_rl(dev, node, sc->acells, sc->scells, &ndi->rl); |
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256 | ofw_bus_intr_to_rl(dev, node, &ndi->rl, NULL); |
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257 | |
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258 | return (ndi); |
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259 | } |
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260 | |
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261 | device_t |
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262 | simplebus_add_device(device_t dev, phandle_t node, u_int order, |
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263 | const char *name, int unit, struct simplebus_devinfo *di) |
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264 | { |
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265 | struct simplebus_devinfo *ndi; |
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266 | device_t cdev; |
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267 | |
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268 | if ((ndi = simplebus_setup_dinfo(dev, node, di)) == NULL) |
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269 | return (NULL); |
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270 | cdev = device_add_child_ordered(dev, order, name, unit); |
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271 | if (cdev == NULL) { |
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272 | device_printf(dev, "<%s>: device_add_child failed\n", |
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273 | ndi->obdinfo.obd_name); |
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274 | resource_list_free(&ndi->rl); |
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275 | ofw_bus_gen_destroy_devinfo(&ndi->obdinfo); |
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276 | if (di == NULL) |
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277 | free(ndi, M_DEVBUF); |
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278 | return (NULL); |
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279 | } |
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280 | device_set_ivars(cdev, ndi); |
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281 | |
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282 | return(cdev); |
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283 | } |
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284 | |
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285 | static device_t |
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286 | simplebus_add_child(device_t dev, u_int order, const char *name, int unit) |
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287 | { |
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288 | device_t cdev; |
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289 | struct simplebus_devinfo *ndi; |
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290 | |
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291 | cdev = device_add_child_ordered(dev, order, name, unit); |
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292 | if (cdev == NULL) |
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293 | return (NULL); |
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294 | |
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295 | ndi = malloc(sizeof(*ndi), M_DEVBUF, M_WAITOK | M_ZERO); |
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296 | ndi->obdinfo.obd_node = -1; |
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297 | resource_list_init(&ndi->rl); |
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298 | device_set_ivars(cdev, ndi); |
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299 | |
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300 | return (cdev); |
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301 | } |
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302 | |
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303 | static const struct ofw_bus_devinfo * |
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304 | simplebus_get_devinfo(device_t bus __unused, device_t child) |
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305 | { |
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306 | struct simplebus_devinfo *ndi; |
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307 | |
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308 | ndi = device_get_ivars(child); |
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309 | if (ndi == NULL) |
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310 | return (NULL); |
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311 | return (&ndi->obdinfo); |
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312 | } |
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313 | |
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314 | static struct resource_list * |
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315 | simplebus_get_resource_list(device_t bus __unused, device_t child) |
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316 | { |
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317 | struct simplebus_devinfo *ndi; |
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318 | |
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319 | ndi = device_get_ivars(child); |
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320 | if (ndi == NULL) |
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321 | return (NULL); |
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322 | return (&ndi->rl); |
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323 | } |
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324 | |
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325 | static struct resource * |
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326 | simplebus_alloc_resource(device_t bus, device_t child, int type, int *rid, |
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327 | rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) |
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328 | { |
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329 | struct simplebus_softc *sc; |
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330 | struct simplebus_devinfo *di; |
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331 | struct resource_list_entry *rle; |
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332 | int j; |
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333 | |
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334 | sc = device_get_softc(bus); |
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335 | |
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336 | /* |
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337 | * Request for the default allocation with a given rid: use resource |
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338 | * list stored in the local device info. |
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339 | */ |
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340 | if (RMAN_IS_DEFAULT_RANGE(start, end)) { |
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341 | if ((di = device_get_ivars(child)) == NULL) |
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342 | return (NULL); |
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343 | |
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344 | if (type == SYS_RES_IOPORT) |
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345 | type = SYS_RES_MEMORY; |
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346 | |
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347 | rle = resource_list_find(&di->rl, type, *rid); |
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348 | if (rle == NULL) { |
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349 | if (bootverbose) |
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350 | device_printf(bus, "no default resources for " |
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351 | "rid = %d, type = %d\n", *rid, type); |
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352 | return (NULL); |
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353 | } |
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354 | start = rle->start; |
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355 | end = rle->end; |
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356 | count = rle->count; |
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357 | } |
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358 | |
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359 | if (type == SYS_RES_MEMORY) { |
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360 | /* Remap through ranges property */ |
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361 | for (j = 0; j < sc->nranges; j++) { |
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362 | if (start >= sc->ranges[j].bus && end < |
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363 | sc->ranges[j].bus + sc->ranges[j].size) { |
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364 | start -= sc->ranges[j].bus; |
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365 | start += sc->ranges[j].host; |
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366 | end -= sc->ranges[j].bus; |
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367 | end += sc->ranges[j].host; |
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368 | break; |
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369 | } |
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370 | } |
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371 | if (j == sc->nranges && sc->nranges != 0) { |
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372 | if (bootverbose) |
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373 | device_printf(bus, "Could not map resource " |
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374 | "%#jx-%#jx\n", start, end); |
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375 | |
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376 | return (NULL); |
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377 | } |
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378 | } |
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379 | |
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380 | return (bus_generic_alloc_resource(bus, child, type, rid, start, end, |
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381 | count, flags)); |
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382 | } |
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383 | |
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384 | static int |
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385 | simplebus_print_res(struct simplebus_devinfo *di) |
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386 | { |
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387 | int rv; |
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388 | |
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389 | if (di == NULL) |
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390 | return (0); |
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391 | rv = 0; |
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392 | rv += resource_list_print_type(&di->rl, "mem", SYS_RES_MEMORY, "%#jx"); |
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393 | rv += resource_list_print_type(&di->rl, "irq", SYS_RES_IRQ, "%jd"); |
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394 | return (rv); |
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395 | } |
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396 | |
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397 | static void |
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398 | simplebus_probe_nomatch(device_t bus, device_t child) |
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399 | { |
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400 | const char *name, *type, *compat; |
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401 | |
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402 | if (!bootverbose) |
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403 | return; |
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404 | |
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405 | compat = ofw_bus_get_compat(child); |
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406 | if (compat == NULL) |
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407 | return; |
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408 | name = ofw_bus_get_name(child); |
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409 | type = ofw_bus_get_type(child); |
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410 | |
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411 | device_printf(bus, "<%s>", name != NULL ? name : "unknown"); |
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412 | simplebus_print_res(device_get_ivars(child)); |
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413 | if (!ofw_bus_status_okay(child)) |
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414 | printf(" disabled"); |
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415 | if (type) |
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416 | printf(" type %s", type); |
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417 | printf(" compat %s (no driver attached)\n", compat); |
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418 | } |
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419 | |
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420 | static int |
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421 | simplebus_print_child(device_t bus, device_t child) |
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422 | { |
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423 | int rv; |
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424 | |
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425 | rv = bus_print_child_header(bus, child); |
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426 | rv += simplebus_print_res(device_get_ivars(child)); |
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427 | if (!ofw_bus_status_okay(child)) |
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428 | rv += printf(" disabled"); |
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429 | rv += bus_print_child_footer(bus, child); |
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430 | return (rv); |
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431 | } |
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