OpenWrt – Blame information for rev 4
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Rev | Author | Line No. | Line |
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4 | office | 1 | /* |
2 | * wl_glue.c: Broadcom WL support module providing a unified SSB/BCMA handling. |
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3 | * Copyright (C) 2011 Jo-Philipp Wich <jo@mein.io> |
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4 | */ |
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5 | |||
6 | #include "wl_glue.h" |
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7 | |||
8 | #include <linux/kernel.h> |
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9 | #include <linux/module.h> |
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10 | #include <linux/init.h> |
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11 | |||
12 | #ifdef CONFIG_BCM47XX |
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13 | #include <bcm47xx.h> |
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14 | #endif |
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15 | |||
16 | #ifdef CONFIG_SSB |
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17 | #include <linux/ssb/ssb.h> |
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18 | #endif |
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19 | |||
20 | #ifdef CONFIG_BCMA |
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21 | #include <linux/bcma/bcma.h> |
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22 | #endif |
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23 | |||
24 | MODULE_AUTHOR("Jo-Philipp Wich (jo@mein.io)"); |
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25 | MODULE_DESCRIPTION("Broadcom WL SSB/BCMA compatibility layer"); |
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26 | MODULE_LICENSE("GPL"); |
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27 | |||
28 | static wl_glue_attach_cb_t attach_cb = NULL; |
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29 | static wl_glue_remove_cb_t remove_cb = NULL; |
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30 | static enum wl_glue_bus_type active_bus_type = WL_GLUE_BUS_TYPE_UNSPEC; |
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31 | static int wl_glue_attached = 0; |
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32 | |||
33 | |||
34 | #ifdef CONFIG_SSB |
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35 | static int wl_glue_ssb_probe(struct ssb_device *dev, const struct ssb_device_id *id) |
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36 | { |
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37 | void *mmio; |
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38 | void *wldev; |
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39 | |||
40 | if (!attach_cb) |
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41 | { |
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42 | pr_err("No attach callback registered\n"); |
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43 | return -ENOSYS; |
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44 | } |
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45 | |||
46 | if (dev->bus->bustype != SSB_BUSTYPE_SSB) |
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47 | { |
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48 | pr_err("Attaching to SSB behind PCI is not supported. Please remove the b43 ssb bridge\n"); |
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49 | return -EINVAL; |
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50 | } |
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51 | |||
52 | mmio = (void *) 0x18000000 + dev->core_index * 0x1000; |
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53 | wldev = attach_cb(id->vendor, id->coreid, (ulong)mmio, dev, dev->irq); |
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54 | |||
55 | if (!wldev) |
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56 | { |
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57 | pr_err("The attach callback failed, SSB probe aborted\n"); |
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58 | return -ENODEV; |
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59 | } |
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60 | |||
61 | ssb_set_drvdata(dev, wldev); |
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62 | return 0; |
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63 | } |
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64 | |||
65 | static void wl_glue_ssb_remove(struct ssb_device *dev) |
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66 | { |
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67 | void *wldev = ssb_get_drvdata(dev); |
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68 | |||
69 | if (remove_cb) |
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70 | remove_cb(wldev); |
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71 | |||
72 | ssb_set_drvdata(dev, NULL); |
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73 | } |
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74 | |||
75 | static const struct ssb_device_id wl_glue_ssb_tbl[] = { |
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76 | SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, SSB_ANY_REV), |
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77 | {}, |
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78 | }; |
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79 | |||
80 | static struct ssb_driver wl_glue_ssb_driver = { |
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81 | .name = KBUILD_MODNAME, |
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82 | .id_table = wl_glue_ssb_tbl, |
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83 | .probe = wl_glue_ssb_probe, |
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84 | .remove = wl_glue_ssb_remove, |
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85 | }; |
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86 | #endif /* CONFIG_SSB */ |
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87 | |||
88 | #ifdef CONFIG_BCMA |
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89 | static int wl_glue_bcma_probe(struct bcma_device *dev) |
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90 | { |
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91 | void *wldev; |
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92 | |||
93 | if (!attach_cb) |
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94 | { |
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95 | pr_err("No attach callback registered\n"); |
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96 | return -ENOSYS; |
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97 | } |
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98 | |||
99 | if (dev->bus->hosttype != BCMA_HOSTTYPE_SOC) |
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100 | { |
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101 | pr_err("Unsupported BCMA bus type %d\n", dev->bus->hosttype); |
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102 | return -EINVAL; |
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103 | } |
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104 | |||
105 | /* |
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106 | * NB: |
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107 | * 0x18000000 = BCMA_ADDR_BASE |
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108 | * 0x1000 = BCMA_CORE_SIZE |
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109 | */ |
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110 | |||
111 | wldev = attach_cb(dev->id.manuf, dev->id.id, (ulong)dev->addr, dev, dev->irq); |
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112 | |||
113 | if (!wldev) |
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114 | { |
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115 | pr_err("The attach callback failed, BCMA probe aborted\n"); |
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116 | return -ENODEV; |
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117 | } |
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118 | |||
119 | bcma_set_drvdata(dev, wldev); |
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120 | return 0; |
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121 | } |
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122 | |||
123 | static void wl_glue_bcma_remove(struct bcma_device *dev) |
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124 | { |
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125 | void *wldev = bcma_get_drvdata(dev); |
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126 | |||
127 | if (remove_cb) |
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128 | remove_cb(wldev); |
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129 | |||
130 | bcma_set_drvdata(dev, NULL); |
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131 | } |
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132 | |||
133 | static const struct bcma_device_id wl_glue_bcma_tbl[] = { |
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134 | BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_80211, BCMA_ANY_REV, BCMA_ANY_CLASS), |
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135 | {}, |
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136 | }; |
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137 | |||
138 | static struct bcma_driver wl_glue_bcma_driver = { |
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139 | .name = KBUILD_MODNAME, |
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140 | .id_table = wl_glue_bcma_tbl, |
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141 | .probe = wl_glue_bcma_probe, |
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142 | .remove = wl_glue_bcma_remove, |
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143 | }; |
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144 | #endif /* CONFIG_BCMA */ |
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145 | |||
146 | |||
147 | void wl_glue_set_attach_callback(wl_glue_attach_cb_t cb) |
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148 | { |
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149 | attach_cb = cb; |
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150 | } |
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151 | EXPORT_SYMBOL(wl_glue_set_attach_callback); |
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152 | |||
153 | void wl_glue_set_remove_callback(wl_glue_remove_cb_t cb) |
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154 | { |
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155 | remove_cb = cb; |
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156 | } |
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157 | EXPORT_SYMBOL(wl_glue_set_remove_callback); |
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158 | |||
159 | int wl_glue_register(void) |
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160 | { |
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161 | int err; |
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162 | |||
163 | switch(active_bus_type) |
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164 | { |
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165 | #ifdef CONFIG_SSB |
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166 | case WL_GLUE_BUS_TYPE_SSB: |
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167 | err = ssb_driver_register(&wl_glue_ssb_driver); |
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168 | break; |
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169 | #endif /* CONFIG_SSB */ |
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170 | |||
171 | #ifdef CONFIG_BCMA |
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172 | case WL_GLUE_BUS_TYPE_BCMA: |
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173 | err = bcma_driver_register(&wl_glue_bcma_driver); |
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174 | break; |
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175 | #endif /* CONFIG_BCMA */ |
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176 | |||
177 | default: |
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178 | pr_err("Not attaching through glue driver due to unsupported bus\n"); |
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179 | err = -ENOSYS; |
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180 | break; |
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181 | } |
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182 | |||
183 | if (!err) |
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184 | { |
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185 | pr_info("SSB/BCMA glue driver successfully attached\n"); |
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186 | wl_glue_attached = 1; |
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187 | } |
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188 | |||
189 | return err; |
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190 | } |
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191 | EXPORT_SYMBOL(wl_glue_register); |
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192 | |||
193 | int wl_glue_unregister(void) |
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194 | { |
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195 | int err; |
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196 | |||
197 | if (!wl_glue_attached) |
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198 | return -ENOSYS; |
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199 | |||
200 | switch (active_bus_type) |
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201 | { |
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202 | #ifdef CONFIG_SSB |
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203 | case WL_GLUE_BUS_TYPE_SSB: |
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204 | ssb_driver_unregister(&wl_glue_ssb_driver); |
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205 | err = 0; |
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206 | break; |
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207 | #endif /* CONFIG_SSB */ |
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208 | |||
209 | #ifdef CONFIG_BCMA |
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210 | case WL_GLUE_BUS_TYPE_BCMA: |
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211 | bcma_driver_unregister(&wl_glue_bcma_driver); |
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212 | err = 0; |
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213 | break; |
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214 | #endif /* CONFIG_BCMA */ |
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215 | |||
216 | default: |
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217 | pr_err("Not removing glue driver due to unsupported bus\n"); |
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218 | err = -ENOSYS; |
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219 | break; |
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220 | } |
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221 | |||
222 | if (!err) |
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223 | { |
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224 | pr_info("SSB/BCMA glue driver successfully detached\n"); |
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225 | wl_glue_attached = 0; |
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226 | } |
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227 | |||
228 | return err; |
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229 | } |
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230 | EXPORT_SYMBOL(wl_glue_unregister); |
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231 | |||
232 | struct device * wl_glue_get_dmadev(void *dev) |
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233 | { |
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234 | struct device *dma_dev; |
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235 | |||
236 | switch (active_bus_type) |
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237 | { |
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238 | #ifdef CONFIG_SSB |
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239 | case WL_GLUE_BUS_TYPE_SSB: |
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240 | dma_dev = ((struct ssb_device *)dev)->dma_dev; |
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241 | break; |
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242 | #endif /* CONFIG_SSB */ |
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243 | |||
244 | #ifdef CONFIG_BCMA |
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245 | case WL_GLUE_BUS_TYPE_BCMA: |
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246 | dma_dev = ((struct bcma_device *)dev)->dma_dev; |
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247 | break; |
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248 | #endif /* CONFIG_BCMA */ |
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249 | |||
250 | default: |
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251 | BUG(); |
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252 | dma_dev = NULL; |
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253 | break; |
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254 | } |
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255 | |||
256 | return dma_dev; |
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257 | } |
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258 | EXPORT_SYMBOL(wl_glue_get_dmadev); |
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259 | |||
260 | |||
261 | static int __init wl_glue_init(void) |
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262 | { |
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263 | #ifdef CONFIG_BCM47XX |
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264 | /* |
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265 | * BCM47xx currently supports either SSB or BCMA bus, |
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266 | * determine the used one from the info set by the |
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267 | * platform setup code. |
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268 | */ |
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269 | switch (bcm47xx_bus_type) |
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270 | { |
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271 | #ifdef CONFIG_BCM47XX_SSB |
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272 | case BCM47XX_BUS_TYPE_SSB: |
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273 | active_bus_type = WL_GLUE_BUS_TYPE_SSB; |
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274 | break; |
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275 | #endif /* CONFIG_BCM47XX_SSB */ |
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276 | |||
277 | #ifdef CONFIG_BCM47XX_BCMA |
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278 | case BCM47XX_BUS_TYPE_BCMA: |
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279 | active_bus_type = WL_GLUE_BUS_TYPE_BCMA; |
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280 | break; |
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281 | #endif /* CONFIG_BCM47XX_BCMA */ |
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282 | } |
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283 | #endif /* CONFIG_BCM47XX */ |
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284 | |||
285 | #ifdef CONFIG_BCM63XX |
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286 | #ifdef CONFIG_SSB |
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287 | /* |
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288 | * BCM63xx currently only uses SSB, so assume that. |
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289 | */ |
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290 | active_bus_type = WL_GLUE_BUS_TYPE_SSB; |
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291 | #endif /* CONFIG_SSB */ |
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292 | #endif /* CONFIG_BCM63XX */ |
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293 | |||
294 | /* do not fail here, let wl_glue_register() return -ENOSYS later */ |
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295 | if (active_bus_type == WL_GLUE_BUS_TYPE_UNSPEC) |
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296 | pr_err("Unable to determine used system bus type\n"); |
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297 | |||
298 | return 0; |
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299 | } |
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300 | |||
301 | static void __exit wl_glue_exit(void) |
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302 | { |
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303 | if (wl_glue_attached) |
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304 | { |
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305 | if (wl_glue_unregister()) |
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306 | pr_err("Failed to unregister glue driver\n"); |
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307 | |||
308 | wl_glue_attached = 0; |
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309 | } |
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310 | |||
311 | return; |
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312 | } |
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313 | |||
314 | module_init(wl_glue_init); |
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315 | module_exit(wl_glue_exit); |