3 Copyright (C) Dean Camera, 2012.
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5 dean [at] fourwalledcubicle [dot] com
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10 Copyright 2012 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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12 Permission to use, copy, modify, distribute, and sell this
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13 software and its documentation for any purpose is hereby granted
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14 without fee, provided that the above copyright notice appear in
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15 all copies and that both that the copyright notice and this
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16 permission notice and warranty disclaimer appear in supporting
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17 documentation, and that the name of the author not be used in
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18 advertising or publicity pertaining to distribution of the
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19 software without specific, written prior permission.
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21 The author disclaim all warranties with regard to this
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22 software, including all implied warranties of merchantability
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23 and fitness. In no event shall the author be liable for any
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24 special, indirect or consequential damages or any damages
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25 whatsoever resulting from loss of use, data or profits, whether
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26 in an action of contract, negligence or other tortious action,
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27 arising out of or in connection with the use or performance of
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31 #include "../../../../Common/Common.h"
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32 #if (ARCH == ARCH_AVR8)
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34 #define __INCLUDE_FROM_USB_DRIVER
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35 #include "../USBMode.h"
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37 #if defined(USB_CAN_BE_HOST)
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39 #define __INCLUDE_FROM_HOST_C
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40 #include "../Host.h"
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42 void USB_Host_ProcessNextHostState(void)
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44 uint8_t ErrorCode = HOST_ENUMERROR_NoError;
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45 uint8_t SubErrorCode = HOST_ENUMERROR_NoError;
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47 static uint16_t WaitMSRemaining;
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48 static uint8_t PostWaitState;
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50 switch (USB_HostState)
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52 case HOST_STATE_WaitForDevice:
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53 if (WaitMSRemaining)
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55 if ((SubErrorCode = USB_Host_WaitMS(1)) != HOST_WAITERROR_Successful)
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57 USB_HostState = PostWaitState;
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58 ErrorCode = HOST_ENUMERROR_WaitStage;
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62 if (!(--WaitMSRemaining))
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63 USB_HostState = PostWaitState;
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67 case HOST_STATE_Powered:
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68 WaitMSRemaining = HOST_DEVICE_SETTLE_DELAY_MS;
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70 USB_HostState = HOST_STATE_Powered_WaitForDeviceSettle;
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72 case HOST_STATE_Powered_WaitForDeviceSettle:
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73 if (WaitMSRemaining--)
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80 USB_Host_VBUS_Manual_Off();
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83 USB_Host_VBUS_Auto_Enable();
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84 USB_Host_VBUS_Auto_On();
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86 #if defined(NO_AUTO_VBUS_MANAGEMENT)
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87 USB_Host_VBUS_Manual_Enable();
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88 USB_Host_VBUS_Manual_On();
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91 USB_HostState = HOST_STATE_Powered_WaitForConnect;
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95 case HOST_STATE_Powered_WaitForConnect:
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96 if (USB_INT_HasOccurred(USB_INT_DCONNI))
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98 USB_INT_Clear(USB_INT_DCONNI);
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99 USB_INT_Clear(USB_INT_DDISCI);
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101 USB_INT_Clear(USB_INT_VBERRI);
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102 USB_INT_Enable(USB_INT_VBERRI);
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104 USB_Host_ResumeBus();
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107 HOST_TASK_NONBLOCK_WAIT(100, HOST_STATE_Powered_DoReset);
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111 case HOST_STATE_Powered_DoReset:
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112 USB_Host_ResetDevice();
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114 HOST_TASK_NONBLOCK_WAIT(200, HOST_STATE_Powered_ConfigPipe);
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116 case HOST_STATE_Powered_ConfigPipe:
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117 if (!(Pipe_ConfigurePipe(PIPE_CONTROLPIPE, EP_TYPE_CONTROL, ENDPOINT_CONTROLEP, PIPE_CONTROLPIPE_DEFAULT_SIZE, 1)))
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119 ErrorCode = HOST_ENUMERROR_PipeConfigError;
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124 USB_HostState = HOST_STATE_Default;
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126 case HOST_STATE_Default:
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127 USB_ControlRequest = (USB_Request_Header_t)
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129 .bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_DEVICE),
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130 .bRequest = REQ_GetDescriptor,
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131 .wValue = (DTYPE_Device << 8),
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136 uint8_t DataBuffer[8];
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138 Pipe_SelectPipe(PIPE_CONTROLPIPE);
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139 if ((SubErrorCode = USB_Host_SendControlRequest(DataBuffer)) != HOST_SENDCONTROL_Successful)
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141 ErrorCode = HOST_ENUMERROR_ControlError;
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145 USB_Host_ControlPipeSize = DataBuffer[offsetof(USB_Descriptor_Device_t, Endpoint0Size)];
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147 USB_Host_ResetDevice();
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149 HOST_TASK_NONBLOCK_WAIT(200, HOST_STATE_Default_PostReset);
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151 case HOST_STATE_Default_PostReset:
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152 if (!(Pipe_ConfigurePipe(PIPE_CONTROLPIPE, EP_TYPE_CONTROL, ENDPOINT_CONTROLEP, USB_Host_ControlPipeSize, 1)))
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154 ErrorCode = HOST_ENUMERROR_PipeConfigError;
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159 USB_ControlRequest = (USB_Request_Header_t)
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161 .bmRequestType = (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_DEVICE),
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162 .bRequest = REQ_SetAddress,
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163 .wValue = USB_HOST_DEVICEADDRESS,
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168 if ((SubErrorCode = USB_Host_SendControlRequest(NULL)) != HOST_SENDCONTROL_Successful)
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170 ErrorCode = HOST_ENUMERROR_ControlError;
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174 HOST_TASK_NONBLOCK_WAIT(100, HOST_STATE_Default_PostAddressSet);
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176 case HOST_STATE_Default_PostAddressSet:
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177 USB_Host_SetDeviceAddress(USB_HOST_DEVICEADDRESS);
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179 USB_HostState = HOST_STATE_Addressed;
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181 EVENT_USB_Host_DeviceEnumerationComplete();
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185 if ((ErrorCode != HOST_ENUMERROR_NoError) && (USB_HostState != HOST_STATE_Unattached))
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187 EVENT_USB_Host_DeviceEnumerationFailed(ErrorCode, SubErrorCode);
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189 USB_Host_VBUS_Auto_Off();
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191 EVENT_USB_Host_DeviceUnattached();
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193 USB_ResetInterface();
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197 uint8_t USB_Host_WaitMS(uint8_t MS)
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199 bool BusSuspended = USB_Host_IsBusSuspended();
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200 uint8_t ErrorCode = HOST_WAITERROR_Successful;
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201 bool HSOFIEnabled = USB_INT_IsEnabled(USB_INT_HSOFI);
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203 USB_INT_Disable(USB_INT_HSOFI);
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204 USB_INT_Clear(USB_INT_HSOFI);
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206 USB_Host_ResumeBus();
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210 if (USB_INT_HasOccurred(USB_INT_HSOFI))
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212 USB_INT_Clear(USB_INT_HSOFI);
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216 if ((USB_HostState == HOST_STATE_Unattached) || (USB_CurrentMode != USB_MODE_Host))
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218 ErrorCode = HOST_WAITERROR_DeviceDisconnect;
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223 if (Pipe_IsError())
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226 ErrorCode = HOST_WAITERROR_PipeError;
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231 if (Pipe_IsStalled())
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234 ErrorCode = HOST_WAITERROR_SetupStalled;
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241 USB_Host_SuspendBus();
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244 USB_INT_Enable(USB_INT_HSOFI);
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249 static void USB_Host_ResetDevice(void)
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251 bool BusSuspended = USB_Host_IsBusSuspended();
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253 USB_INT_Disable(USB_INT_DDISCI);
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255 USB_Host_ResetBus();
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256 while (!(USB_Host_IsBusResetComplete()));
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257 USB_Host_ResumeBus();
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259 USB_Host_ConfigurationNumber = 0;
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261 bool HSOFIEnabled = USB_INT_IsEnabled(USB_INT_HSOFI);
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263 USB_INT_Disable(USB_INT_HSOFI);
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264 USB_INT_Clear(USB_INT_HSOFI);
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266 for (uint8_t MSRem = 10; MSRem != 0; MSRem--)
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268 /* Workaround for powerless-pull-up devices. After a USB bus reset,
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269 all disconnection interrupts are suppressed while a USB frame is
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270 looked for - if it is found within 10ms, the device is still
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273 if (USB_INT_HasOccurred(USB_INT_HSOFI))
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275 USB_INT_Clear(USB_INT_HSOFI);
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276 USB_INT_Clear(USB_INT_DDISCI);
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284 USB_INT_Enable(USB_INT_HSOFI);
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287 USB_Host_SuspendBus();
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289 USB_INT_Enable(USB_INT_DDISCI);
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