Ashwin Athani
mX mbed BaseBoard USB HID
USBMouse/usbdevice.cpp@0:093612081f64, 2010-12-08 (annotated)
- Committer:
- ashwin_athani
- Date:
- Wed Dec 08 06:30:25 2010 +0000
- Revision:
- 0:093612081f64
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| ashwin_athani | 0:093612081f64 | 1 | /* usbdevice.cpp */ |
| ashwin_athani | 0:093612081f64 | 2 | /* Generic USB device */ |
| ashwin_athani | 0:093612081f64 | 3 | /* Copyright (c) Phil Wright 2008 */ |
| ashwin_athani | 0:093612081f64 | 4 | |
| ashwin_athani | 0:093612081f64 | 5 | #include "mbed.h" |
| ashwin_athani | 0:093612081f64 | 6 | #include "usbdevice.h" |
| ashwin_athani | 0:093612081f64 | 7 | |
| ashwin_athani | 0:093612081f64 | 8 | /* Standard requests */ |
| ashwin_athani | 0:093612081f64 | 9 | #define GET_STATUS (0) |
| ashwin_athani | 0:093612081f64 | 10 | #define CLEAR_FEATURE (1) |
| ashwin_athani | 0:093612081f64 | 11 | #define SET_FEATURE (3) |
| ashwin_athani | 0:093612081f64 | 12 | #define SET_ADDRESS (5) |
| ashwin_athani | 0:093612081f64 | 13 | #define GET_DESCRIPTOR (6) |
| ashwin_athani | 0:093612081f64 | 14 | #define SET_DESCRIPTOR (7) |
| ashwin_athani | 0:093612081f64 | 15 | #define GET_CONFIGURATION (8) |
| ashwin_athani | 0:093612081f64 | 16 | #define SET_CONFIGURATION (9) |
| ashwin_athani | 0:093612081f64 | 17 | #define GET_INTERFACE (10) |
| ashwin_athani | 0:093612081f64 | 18 | #define SET_INTERFACE (11) |
| ashwin_athani | 0:093612081f64 | 19 | |
| ashwin_athani | 0:093612081f64 | 20 | /* Device status */ |
| ashwin_athani | 0:093612081f64 | 21 | #define DEVICE_STATUS_SELF_POWERED (1<<0) |
| ashwin_athani | 0:093612081f64 | 22 | #define DEVICE_STATUS_REMOTE_WAKEUP (1<<1) |
| ashwin_athani | 0:093612081f64 | 23 | |
| ashwin_athani | 0:093612081f64 | 24 | /* Endpoint status */ |
| ashwin_athani | 0:093612081f64 | 25 | #define ENDPOINT_STATUS_HALT (1<<0) |
| ashwin_athani | 0:093612081f64 | 26 | |
| ashwin_athani | 0:093612081f64 | 27 | /* Standard feature selectors */ |
| ashwin_athani | 0:093612081f64 | 28 | #define DEVICE_REMOTE_WAKEUP (1) |
| ashwin_athani | 0:093612081f64 | 29 | #define ENDPOINT_HALT (0) |
| ashwin_athani | 0:093612081f64 | 30 | |
| ashwin_athani | 0:093612081f64 | 31 | /* Macro to convert wIndex endpoint number to physical endpoint number */ |
| ashwin_athani | 0:093612081f64 | 32 | #define WINDEX_TO_PHYSICAL(endpoint) (((endpoint & 0x0f) << 1) + ((endpoint & 0x80) ? 1 : 0)) |
| ashwin_athani | 0:093612081f64 | 33 | |
| ashwin_athani | 0:093612081f64 | 34 | CONTROL_TRANSFER transfer; |
| ashwin_athani | 0:093612081f64 | 35 | USB_DEVICE device; |
| ashwin_athani | 0:093612081f64 | 36 | |
| ashwin_athani | 0:093612081f64 | 37 | usbdevice::usbdevice() |
| ashwin_athani | 0:093612081f64 | 38 | { |
| ashwin_athani | 0:093612081f64 | 39 | /* Set initial device state */ |
| ashwin_athani | 0:093612081f64 | 40 | device.state = POWERED; |
| ashwin_athani | 0:093612081f64 | 41 | device.configuration = 0; |
| ashwin_athani | 0:093612081f64 | 42 | device.suspended = false; |
| ashwin_athani | 0:093612081f64 | 43 | |
| ashwin_athani | 0:093612081f64 | 44 | /* Set the maximum packet size for the control endpoints */ |
| ashwin_athani | 0:093612081f64 | 45 | realiseEndpoint(EP0IN, MAX_PACKET_SIZE_EP0); |
| ashwin_athani | 0:093612081f64 | 46 | realiseEndpoint(EP0OUT, MAX_PACKET_SIZE_EP0); |
| ashwin_athani | 0:093612081f64 | 47 | |
| ashwin_athani | 0:093612081f64 | 48 | /* Enable endpoint events for EP0 */ |
| ashwin_athani | 0:093612081f64 | 49 | enableEndpointEvent(EP0IN); |
| ashwin_athani | 0:093612081f64 | 50 | enableEndpointEvent(EP0OUT); |
| ashwin_athani | 0:093612081f64 | 51 | } |
| ashwin_athani | 0:093612081f64 | 52 | |
| ashwin_athani | 0:093612081f64 | 53 | void usbdevice::endpointEventEP0Setup(void) |
| ashwin_athani | 0:093612081f64 | 54 | { |
| ashwin_athani | 0:093612081f64 | 55 | /* Endpoint 0 setup event */ |
| ashwin_athani | 0:093612081f64 | 56 | if (!controlSetup()) |
| ashwin_athani | 0:093612081f64 | 57 | { |
| ashwin_athani | 0:093612081f64 | 58 | /* Protocol stall; this will stall both endpoints */ |
| ashwin_athani | 0:093612081f64 | 59 | stallEndpoint(EP0OUT); |
| ashwin_athani | 0:093612081f64 | 60 | } |
| ashwin_athani | 0:093612081f64 | 61 | } |
| ashwin_athani | 0:093612081f64 | 62 | |
| ashwin_athani | 0:093612081f64 | 63 | void usbdevice::endpointEventEP0Out(void) |
| ashwin_athani | 0:093612081f64 | 64 | { |
| ashwin_athani | 0:093612081f64 | 65 | /* Endpoint 0 OUT data event */ |
| ashwin_athani | 0:093612081f64 | 66 | if (!controlOut()) |
| ashwin_athani | 0:093612081f64 | 67 | { |
| ashwin_athani | 0:093612081f64 | 68 | /* Protocol stall; this will stall both endpoints */ |
| ashwin_athani | 0:093612081f64 | 69 | stallEndpoint(EP0OUT); |
| ashwin_athani | 0:093612081f64 | 70 | } |
| ashwin_athani | 0:093612081f64 | 71 | } |
| ashwin_athani | 0:093612081f64 | 72 | |
| ashwin_athani | 0:093612081f64 | 73 | void usbdevice::endpointEventEP0In(void) |
| ashwin_athani | 0:093612081f64 | 74 | { |
| ashwin_athani | 0:093612081f64 | 75 | /* Endpoint 0 IN data event */ |
| ashwin_athani | 0:093612081f64 | 76 | if (!controlIn()) |
| ashwin_athani | 0:093612081f64 | 77 | { |
| ashwin_athani | 0:093612081f64 | 78 | /* Protocol stall; this will stall both endpoints */ |
| ashwin_athani | 0:093612081f64 | 79 | stallEndpoint(EP0OUT); |
| ashwin_athani | 0:093612081f64 | 80 | } |
| ashwin_athani | 0:093612081f64 | 81 | } |
| ashwin_athani | 0:093612081f64 | 82 | |
| ashwin_athani | 0:093612081f64 | 83 | void usbdevice::deviceEventReset(void) |
| ashwin_athani | 0:093612081f64 | 84 | { |
| ashwin_athani | 0:093612081f64 | 85 | device.state = DEFAULT; |
| ashwin_athani | 0:093612081f64 | 86 | device.configuration = 0; |
| ashwin_athani | 0:093612081f64 | 87 | device.suspended = false; |
| ashwin_athani | 0:093612081f64 | 88 | } |
| ashwin_athani | 0:093612081f64 | 89 | |
| ashwin_athani | 0:093612081f64 | 90 | void usbdevice::decodeSetupPacket(unsigned char *data, SETUP_PACKET *packet) |
| ashwin_athani | 0:093612081f64 | 91 | { |
| ashwin_athani | 0:093612081f64 | 92 | /* Fill in the elements of a SETUP_PACKET structure from raw data */ |
| ashwin_athani | 0:093612081f64 | 93 | packet->bmRequestType.dataTransferDirection = (data[0] & 0x80) >> 7; |
| ashwin_athani | 0:093612081f64 | 94 | packet->bmRequestType.Type = (data[0] & 0x60) >> 5; |
| ashwin_athani | 0:093612081f64 | 95 | packet->bmRequestType.Recipient = data[0] & 0x1f; |
| ashwin_athani | 0:093612081f64 | 96 | packet->bRequest = data[1]; |
| ashwin_athani | 0:093612081f64 | 97 | packet->wValue = (data[2] | (unsigned short)data[3] << 8); |
| ashwin_athani | 0:093612081f64 | 98 | packet->wIndex = (data[4] | (unsigned short)data[5] << 8); |
| ashwin_athani | 0:093612081f64 | 99 | packet->wLength = (data[6] | (unsigned short)data[7] << 8); |
| ashwin_athani | 0:093612081f64 | 100 | } |
| ashwin_athani | 0:093612081f64 | 101 | |
| ashwin_athani | 0:093612081f64 | 102 | bool usbdevice::controlSetup(void) |
| ashwin_athani | 0:093612081f64 | 103 | { |
| ashwin_athani | 0:093612081f64 | 104 | /* Control transfer setup stage */ |
| ashwin_athani | 0:093612081f64 | 105 | unsigned char buffer[MAX_PACKET_SIZE_EP0]; |
| ashwin_athani | 0:093612081f64 | 106 | unsigned long count; |
| ashwin_athani | 0:093612081f64 | 107 | |
| ashwin_athani | 0:093612081f64 | 108 | count = endpointRead(EP0OUT, buffer); |
| ashwin_athani | 0:093612081f64 | 109 | |
| ashwin_athani | 0:093612081f64 | 110 | /* Must be 8 bytes of data */ |
| ashwin_athani | 0:093612081f64 | 111 | if (count != 8) |
| ashwin_athani | 0:093612081f64 | 112 | { |
| ashwin_athani | 0:093612081f64 | 113 | return false; |
| ashwin_athani | 0:093612081f64 | 114 | } |
| ashwin_athani | 0:093612081f64 | 115 | |
| ashwin_athani | 0:093612081f64 | 116 | /* Initialise control transfer state */ |
| ashwin_athani | 0:093612081f64 | 117 | decodeSetupPacket(buffer, &transfer.setup); |
| ashwin_athani | 0:093612081f64 | 118 | transfer.ptr = NULL; |
| ashwin_athani | 0:093612081f64 | 119 | transfer.remaining = 0; |
| ashwin_athani | 0:093612081f64 | 120 | transfer.direction = 0; |
| ashwin_athani | 0:093612081f64 | 121 | transfer.zlp = false; |
| ashwin_athani | 0:093612081f64 | 122 | |
| ashwin_athani | 0:093612081f64 | 123 | /* Process request */ |
| ashwin_athani | 0:093612081f64 | 124 | if (!requestSetup()) |
| ashwin_athani | 0:093612081f64 | 125 | { |
| ashwin_athani | 0:093612081f64 | 126 | return false; |
| ashwin_athani | 0:093612081f64 | 127 | } |
| ashwin_athani | 0:093612081f64 | 128 | |
| ashwin_athani | 0:093612081f64 | 129 | /* Check transfer size and direction */ |
| ashwin_athani | 0:093612081f64 | 130 | if (transfer.setup.wLength>0) |
| ashwin_athani | 0:093612081f64 | 131 | { |
| ashwin_athani | 0:093612081f64 | 132 | if (transfer.setup.bmRequestType.dataTransferDirection==DEVICE_TO_HOST) |
| ashwin_athani | 0:093612081f64 | 133 | { |
| ashwin_athani | 0:093612081f64 | 134 | /* IN data stage is required */ |
| ashwin_athani | 0:093612081f64 | 135 | if (transfer.direction != DEVICE_TO_HOST) |
| ashwin_athani | 0:093612081f64 | 136 | { |
| ashwin_athani | 0:093612081f64 | 137 | return false; |
| ashwin_athani | 0:093612081f64 | 138 | } |
| ashwin_athani | 0:093612081f64 | 139 | |
| ashwin_athani | 0:093612081f64 | 140 | /* Transfer must be less than or equal to the size requested by the host */ |
| ashwin_athani | 0:093612081f64 | 141 | if (transfer.remaining > transfer.setup.wLength) |
| ashwin_athani | 0:093612081f64 | 142 | { |
| ashwin_athani | 0:093612081f64 | 143 | transfer.remaining = transfer.setup.wLength; |
| ashwin_athani | 0:093612081f64 | 144 | } |
| ashwin_athani | 0:093612081f64 | 145 | } |
| ashwin_athani | 0:093612081f64 | 146 | else |
| ashwin_athani | 0:093612081f64 | 147 | { |
| ashwin_athani | 0:093612081f64 | 148 | /* OUT data stage is required */ |
| ashwin_athani | 0:093612081f64 | 149 | if (transfer.direction != HOST_TO_DEVICE) |
| ashwin_athani | 0:093612081f64 | 150 | { |
| ashwin_athani | 0:093612081f64 | 151 | return false; |
| ashwin_athani | 0:093612081f64 | 152 | } |
| ashwin_athani | 0:093612081f64 | 153 | |
| ashwin_athani | 0:093612081f64 | 154 | /* Transfer must be equal to the size requested by the host */ |
| ashwin_athani | 0:093612081f64 | 155 | if (transfer.remaining != transfer.setup.wLength) |
| ashwin_athani | 0:093612081f64 | 156 | { |
| ashwin_athani | 0:093612081f64 | 157 | return false; |
| ashwin_athani | 0:093612081f64 | 158 | } |
| ashwin_athani | 0:093612081f64 | 159 | } |
| ashwin_athani | 0:093612081f64 | 160 | } |
| ashwin_athani | 0:093612081f64 | 161 | else |
| ashwin_athani | 0:093612081f64 | 162 | { |
| ashwin_athani | 0:093612081f64 | 163 | /* No data stage; transfer size must be zero */ |
| ashwin_athani | 0:093612081f64 | 164 | if (transfer.remaining != 0) |
| ashwin_athani | 0:093612081f64 | 165 | { |
| ashwin_athani | 0:093612081f64 | 166 | return false; |
| ashwin_athani | 0:093612081f64 | 167 | } |
| ashwin_athani | 0:093612081f64 | 168 | } |
| ashwin_athani | 0:093612081f64 | 169 | |
| ashwin_athani | 0:093612081f64 | 170 | /* Data or status stage if applicable */ |
| ashwin_athani | 0:093612081f64 | 171 | if (transfer.setup.wLength>0) |
| ashwin_athani | 0:093612081f64 | 172 | { |
| ashwin_athani | 0:093612081f64 | 173 | if (transfer.setup.bmRequestType.dataTransferDirection==DEVICE_TO_HOST) |
| ashwin_athani | 0:093612081f64 | 174 | { |
| ashwin_athani | 0:093612081f64 | 175 | /* Check if we'll need to send a zero length packet at the end of this transfer */ |
| ashwin_athani | 0:093612081f64 | 176 | if (transfer.setup.wLength > transfer.remaining) |
| ashwin_athani | 0:093612081f64 | 177 | { |
| ashwin_athani | 0:093612081f64 | 178 | /* Device wishes to transfer less than host requested */ |
| ashwin_athani | 0:093612081f64 | 179 | if ((transfer.remaining % MAX_PACKET_SIZE_EP0) == 0) |
| ashwin_athani | 0:093612081f64 | 180 | { |
| ashwin_athani | 0:093612081f64 | 181 | /* Transfer is a multiple of EP0 max packet size */ |
| ashwin_athani | 0:093612081f64 | 182 | transfer.zlp = true; |
| ashwin_athani | 0:093612081f64 | 183 | } |
| ashwin_athani | 0:093612081f64 | 184 | } |
| ashwin_athani | 0:093612081f64 | 185 | |
| ashwin_athani | 0:093612081f64 | 186 | /* IN stage */ |
| ashwin_athani | 0:093612081f64 | 187 | controlIn(); |
| ashwin_athani | 0:093612081f64 | 188 | } |
| ashwin_athani | 0:093612081f64 | 189 | } |
| ashwin_athani | 0:093612081f64 | 190 | else |
| ashwin_athani | 0:093612081f64 | 191 | { |
| ashwin_athani | 0:093612081f64 | 192 | /* Status stage */ |
| ashwin_athani | 0:093612081f64 | 193 | endpointWrite(EP0IN, NULL, 0); |
| ashwin_athani | 0:093612081f64 | 194 | } |
| ashwin_athani | 0:093612081f64 | 195 | |
| ashwin_athani | 0:093612081f64 | 196 | return true; |
| ashwin_athani | 0:093612081f64 | 197 | } |
| ashwin_athani | 0:093612081f64 | 198 | |
| ashwin_athani | 0:093612081f64 | 199 | bool usbdevice::controlOut(void) |
| ashwin_athani | 0:093612081f64 | 200 | { |
| ashwin_athani | 0:093612081f64 | 201 | /* Control transfer data OUT stage */ |
| ashwin_athani | 0:093612081f64 | 202 | unsigned char buffer[MAX_PACKET_SIZE_EP0]; |
| ashwin_athani | 0:093612081f64 | 203 | unsigned long packetSize; |
| ashwin_athani | 0:093612081f64 | 204 | |
| ashwin_athani | 0:093612081f64 | 205 | /* Check we should be transferring data OUT */ |
| ashwin_athani | 0:093612081f64 | 206 | if (transfer.direction != HOST_TO_DEVICE) |
| ashwin_athani | 0:093612081f64 | 207 | { |
| ashwin_athani | 0:093612081f64 | 208 | return false; |
| ashwin_athani | 0:093612081f64 | 209 | } |
| ashwin_athani | 0:093612081f64 | 210 | |
| ashwin_athani | 0:093612081f64 | 211 | /* Read from endpoint */ |
| ashwin_athani | 0:093612081f64 | 212 | packetSize = endpointRead(EP0OUT, buffer); |
| ashwin_athani | 0:093612081f64 | 213 | |
| ashwin_athani | 0:093612081f64 | 214 | /* Check if transfer size is valid */ |
| ashwin_athani | 0:093612081f64 | 215 | if (packetSize > transfer.remaining) |
| ashwin_athani | 0:093612081f64 | 216 | { |
| ashwin_athani | 0:093612081f64 | 217 | /* Too big */ |
| ashwin_athani | 0:093612081f64 | 218 | return false; |
| ashwin_athani | 0:093612081f64 | 219 | } |
| ashwin_athani | 0:093612081f64 | 220 | |
| ashwin_athani | 0:093612081f64 | 221 | /* Update transfer */ |
| ashwin_athani | 0:093612081f64 | 222 | transfer.ptr += packetSize; |
| ashwin_athani | 0:093612081f64 | 223 | transfer.remaining -= packetSize; |
| ashwin_athani | 0:093612081f64 | 224 | |
| ashwin_athani | 0:093612081f64 | 225 | /* Check if transfer has completed */ |
| ashwin_athani | 0:093612081f64 | 226 | if (transfer.remaining == 0) |
| ashwin_athani | 0:093612081f64 | 227 | { |
| ashwin_athani | 0:093612081f64 | 228 | /* Process request */ |
| ashwin_athani | 0:093612081f64 | 229 | if (!requestOut()) |
| ashwin_athani | 0:093612081f64 | 230 | { |
| ashwin_athani | 0:093612081f64 | 231 | return false; |
| ashwin_athani | 0:093612081f64 | 232 | } |
| ashwin_athani | 0:093612081f64 | 233 | |
| ashwin_athani | 0:093612081f64 | 234 | /* Status stage */ |
| ashwin_athani | 0:093612081f64 | 235 | endpointWrite(EP0IN, NULL, 0); |
| ashwin_athani | 0:093612081f64 | 236 | } |
| ashwin_athani | 0:093612081f64 | 237 | |
| ashwin_athani | 0:093612081f64 | 238 | return true; |
| ashwin_athani | 0:093612081f64 | 239 | } |
| ashwin_athani | 0:093612081f64 | 240 | |
| ashwin_athani | 0:093612081f64 | 241 | bool usbdevice::controlIn(void) |
| ashwin_athani | 0:093612081f64 | 242 | { |
| ashwin_athani | 0:093612081f64 | 243 | /* Control transfer data IN stage */ |
| ashwin_athani | 0:093612081f64 | 244 | unsigned packetSize; |
| ashwin_athani | 0:093612081f64 | 245 | |
| ashwin_athani | 0:093612081f64 | 246 | /* Check if transfer has completed (status stage transactions also have transfer.remaining == 0) */ |
| ashwin_athani | 0:093612081f64 | 247 | if (transfer.remaining == 0) |
| ashwin_athani | 0:093612081f64 | 248 | { |
| ashwin_athani | 0:093612081f64 | 249 | if (transfer.zlp) |
| ashwin_athani | 0:093612081f64 | 250 | { |
| ashwin_athani | 0:093612081f64 | 251 | /* Send zero length packet */ |
| ashwin_athani | 0:093612081f64 | 252 | endpointWrite(EP0IN, NULL, 0); |
| ashwin_athani | 0:093612081f64 | 253 | transfer.zlp = false; |
| ashwin_athani | 0:093612081f64 | 254 | } |
| ashwin_athani | 0:093612081f64 | 255 | |
| ashwin_athani | 0:093612081f64 | 256 | /* Completed */ |
| ashwin_athani | 0:093612081f64 | 257 | return true; |
| ashwin_athani | 0:093612081f64 | 258 | } |
| ashwin_athani | 0:093612081f64 | 259 | |
| ashwin_athani | 0:093612081f64 | 260 | /* Check we should be transferring data IN */ |
| ashwin_athani | 0:093612081f64 | 261 | if (transfer.direction != DEVICE_TO_HOST) |
| ashwin_athani | 0:093612081f64 | 262 | { |
| ashwin_athani | 0:093612081f64 | 263 | return false; |
| ashwin_athani | 0:093612081f64 | 264 | } |
| ashwin_athani | 0:093612081f64 | 265 | |
| ashwin_athani | 0:093612081f64 | 266 | packetSize = transfer.remaining; |
| ashwin_athani | 0:093612081f64 | 267 | |
| ashwin_athani | 0:093612081f64 | 268 | if (packetSize > MAX_PACKET_SIZE_EP0) |
| ashwin_athani | 0:093612081f64 | 269 | { |
| ashwin_athani | 0:093612081f64 | 270 | packetSize = MAX_PACKET_SIZE_EP0; |
| ashwin_athani | 0:093612081f64 | 271 | } |
| ashwin_athani | 0:093612081f64 | 272 | |
| ashwin_athani | 0:093612081f64 | 273 | /* Write to endpoint */ |
| ashwin_athani | 0:093612081f64 | 274 | endpointWrite(EP0IN, transfer.ptr, packetSize); |
| ashwin_athani | 0:093612081f64 | 275 | |
| ashwin_athani | 0:093612081f64 | 276 | /* Update transfer */ |
| ashwin_athani | 0:093612081f64 | 277 | transfer.ptr += packetSize; |
| ashwin_athani | 0:093612081f64 | 278 | transfer.remaining -= packetSize; |
| ashwin_athani | 0:093612081f64 | 279 | |
| ashwin_athani | 0:093612081f64 | 280 | return true; |
| ashwin_athani | 0:093612081f64 | 281 | } |
| ashwin_athani | 0:093612081f64 | 282 | |
| ashwin_athani | 0:093612081f64 | 283 | bool usbdevice::requestSetup(void) |
| ashwin_athani | 0:093612081f64 | 284 | { |
| ashwin_athani | 0:093612081f64 | 285 | bool success = false; |
| ashwin_athani | 0:093612081f64 | 286 | |
| ashwin_athani | 0:093612081f64 | 287 | /* Process standard requests */ |
| ashwin_athani | 0:093612081f64 | 288 | if ((transfer.setup.bmRequestType.Type == STANDARD_TYPE)) |
| ashwin_athani | 0:093612081f64 | 289 | { |
| ashwin_athani | 0:093612081f64 | 290 | switch (transfer.setup.bRequest) |
| ashwin_athani | 0:093612081f64 | 291 | { |
| ashwin_athani | 0:093612081f64 | 292 | case GET_STATUS: |
| ashwin_athani | 0:093612081f64 | 293 | success = requestGetStatus(); |
| ashwin_athani | 0:093612081f64 | 294 | break; |
| ashwin_athani | 0:093612081f64 | 295 | case CLEAR_FEATURE: |
| ashwin_athani | 0:093612081f64 | 296 | success = requestClearFeature(); |
| ashwin_athani | 0:093612081f64 | 297 | break; |
| ashwin_athani | 0:093612081f64 | 298 | case SET_FEATURE: |
| ashwin_athani | 0:093612081f64 | 299 | success = requestSetFeature(); |
| ashwin_athani | 0:093612081f64 | 300 | break; |
| ashwin_athani | 0:093612081f64 | 301 | case SET_ADDRESS: |
| ashwin_athani | 0:093612081f64 | 302 | success = requestSetAddress(); |
| ashwin_athani | 0:093612081f64 | 303 | break; |
| ashwin_athani | 0:093612081f64 | 304 | case GET_DESCRIPTOR: |
| ashwin_athani | 0:093612081f64 | 305 | success = requestGetDescriptor(); |
| ashwin_athani | 0:093612081f64 | 306 | break; |
| ashwin_athani | 0:093612081f64 | 307 | case SET_DESCRIPTOR: |
| ashwin_athani | 0:093612081f64 | 308 | /* TODO: Support is optional, not implemented here */ |
| ashwin_athani | 0:093612081f64 | 309 | success = false; |
| ashwin_athani | 0:093612081f64 | 310 | break; |
| ashwin_athani | 0:093612081f64 | 311 | case GET_CONFIGURATION: |
| ashwin_athani | 0:093612081f64 | 312 | success = requestGetConfiguration(); |
| ashwin_athani | 0:093612081f64 | 313 | break; |
| ashwin_athani | 0:093612081f64 | 314 | case SET_CONFIGURATION: |
| ashwin_athani | 0:093612081f64 | 315 | success = requestSetConfiguration(); |
| ashwin_athani | 0:093612081f64 | 316 | break; |
| ashwin_athani | 0:093612081f64 | 317 | case GET_INTERFACE: |
| ashwin_athani | 0:093612081f64 | 318 | success = requestGetInterface(); |
| ashwin_athani | 0:093612081f64 | 319 | break; |
| ashwin_athani | 0:093612081f64 | 320 | case SET_INTERFACE: |
| ashwin_athani | 0:093612081f64 | 321 | success = requestSetInterface(); |
| ashwin_athani | 0:093612081f64 | 322 | break; |
| ashwin_athani | 0:093612081f64 | 323 | default: |
| ashwin_athani | 0:093612081f64 | 324 | break; |
| ashwin_athani | 0:093612081f64 | 325 | } |
| ashwin_athani | 0:093612081f64 | 326 | } |
| ashwin_athani | 0:093612081f64 | 327 | |
| ashwin_athani | 0:093612081f64 | 328 | return success; |
| ashwin_athani | 0:093612081f64 | 329 | } |
| ashwin_athani | 0:093612081f64 | 330 | |
| ashwin_athani | 0:093612081f64 | 331 | bool usbdevice::requestOut(void) |
| ashwin_athani | 0:093612081f64 | 332 | { |
| ashwin_athani | 0:093612081f64 | 333 | return true; |
| ashwin_athani | 0:093612081f64 | 334 | } |
| ashwin_athani | 0:093612081f64 | 335 | |
| ashwin_athani | 0:093612081f64 | 336 | bool usbdevice::requestSetAddress(void) |
| ashwin_athani | 0:093612081f64 | 337 | { |
| ashwin_athani | 0:093612081f64 | 338 | /* Set the device address */ |
| ashwin_athani | 0:093612081f64 | 339 | setAddress(transfer.setup.wValue); |
| ashwin_athani | 0:093612081f64 | 340 | |
| ashwin_athani | 0:093612081f64 | 341 | if (transfer.setup.wValue == 0) |
| ashwin_athani | 0:093612081f64 | 342 | { |
| ashwin_athani | 0:093612081f64 | 343 | device.state = DEFAULT; |
| ashwin_athani | 0:093612081f64 | 344 | } |
| ashwin_athani | 0:093612081f64 | 345 | else |
| ashwin_athani | 0:093612081f64 | 346 | { |
| ashwin_athani | 0:093612081f64 | 347 | device.state = ADDRESS; |
| ashwin_athani | 0:093612081f64 | 348 | } |
| ashwin_athani | 0:093612081f64 | 349 | |
| ashwin_athani | 0:093612081f64 | 350 | return true; |
| ashwin_athani | 0:093612081f64 | 351 | } |
| ashwin_athani | 0:093612081f64 | 352 | |
| ashwin_athani | 0:093612081f64 | 353 | bool usbdevice::requestSetConfiguration(void) |
| ashwin_athani | 0:093612081f64 | 354 | { |
| ashwin_athani | 0:093612081f64 | 355 | /* Set the device configuration */ |
| ashwin_athani | 0:093612081f64 | 356 | if (transfer.setup.wValue == 0) |
| ashwin_athani | 0:093612081f64 | 357 | { |
| ashwin_athani | 0:093612081f64 | 358 | /* Not configured */ |
| ashwin_athani | 0:093612081f64 | 359 | unconfigureDevice(); |
| ashwin_athani | 0:093612081f64 | 360 | device.state = ADDRESS; |
| ashwin_athani | 0:093612081f64 | 361 | } |
| ashwin_athani | 0:093612081f64 | 362 | else |
| ashwin_athani | 0:093612081f64 | 363 | { |
| ashwin_athani | 0:093612081f64 | 364 | configureDevice(); |
| ashwin_athani | 0:093612081f64 | 365 | device.state = CONFIGURED; |
| ashwin_athani | 0:093612081f64 | 366 | } |
| ashwin_athani | 0:093612081f64 | 367 | |
| ashwin_athani | 0:093612081f64 | 368 | /* TODO: We do not currently support multiple configurations, just keep a record of the configuration value */ |
| ashwin_athani | 0:093612081f64 | 369 | device.configuration = transfer.setup.wValue; |
| ashwin_athani | 0:093612081f64 | 370 | |
| ashwin_athani | 0:093612081f64 | 371 | return true; |
| ashwin_athani | 0:093612081f64 | 372 | } |
| ashwin_athani | 0:093612081f64 | 373 | |
| ashwin_athani | 0:093612081f64 | 374 | bool usbdevice::requestGetConfiguration(void) |
| ashwin_athani | 0:093612081f64 | 375 | { |
| ashwin_athani | 0:093612081f64 | 376 | /* Send the device configuration */ |
| ashwin_athani | 0:093612081f64 | 377 | transfer.ptr = &device.configuration; |
| ashwin_athani | 0:093612081f64 | 378 | transfer.remaining = sizeof(device.configuration); |
| ashwin_athani | 0:093612081f64 | 379 | transfer.direction = DEVICE_TO_HOST; |
| ashwin_athani | 0:093612081f64 | 380 | return true; |
| ashwin_athani | 0:093612081f64 | 381 | } |
| ashwin_athani | 0:093612081f64 | 382 | |
| ashwin_athani | 0:093612081f64 | 383 | bool usbdevice::requestGetInterface(void) |
| ashwin_athani | 0:093612081f64 | 384 | { |
| ashwin_athani | 0:093612081f64 | 385 | static unsigned char alternateSetting; |
| ashwin_athani | 0:093612081f64 | 386 | |
| ashwin_athani | 0:093612081f64 | 387 | /* Return the selected alternate setting for an interface */ |
| ashwin_athani | 0:093612081f64 | 388 | |
| ashwin_athani | 0:093612081f64 | 389 | if (device.state != CONFIGURED) |
| ashwin_athani | 0:093612081f64 | 390 | { |
| ashwin_athani | 0:093612081f64 | 391 | return false; |
| ashwin_athani | 0:093612081f64 | 392 | } |
| ashwin_athani | 0:093612081f64 | 393 | |
| ashwin_athani | 0:093612081f64 | 394 | /* TODO: We currently do not support alternate settings so always return zero */ |
| ashwin_athani | 0:093612081f64 | 395 | /* TODO: Should check that the interface number is valid */ |
| ashwin_athani | 0:093612081f64 | 396 | alternateSetting = 0; |
| ashwin_athani | 0:093612081f64 | 397 | |
| ashwin_athani | 0:093612081f64 | 398 | /* Send the alternate setting */ |
| ashwin_athani | 0:093612081f64 | 399 | transfer.ptr = &alternateSetting; |
| ashwin_athani | 0:093612081f64 | 400 | transfer.remaining = sizeof(alternateSetting); |
| ashwin_athani | 0:093612081f64 | 401 | transfer.direction = DEVICE_TO_HOST; |
| ashwin_athani | 0:093612081f64 | 402 | return true; |
| ashwin_athani | 0:093612081f64 | 403 | } |
| ashwin_athani | 0:093612081f64 | 404 | |
| ashwin_athani | 0:093612081f64 | 405 | bool usbdevice::requestSetInterface(void) |
| ashwin_athani | 0:093612081f64 | 406 | { |
| ashwin_athani | 0:093612081f64 | 407 | /* TODO: We currently do not support alternate settings, return false */ |
| ashwin_athani | 0:093612081f64 | 408 | return false; |
| ashwin_athani | 0:093612081f64 | 409 | } |
| ashwin_athani | 0:093612081f64 | 410 | |
| ashwin_athani | 0:093612081f64 | 411 | bool usbdevice::requestSetFeature() |
| ashwin_athani | 0:093612081f64 | 412 | { |
| ashwin_athani | 0:093612081f64 | 413 | bool success = false; |
| ashwin_athani | 0:093612081f64 | 414 | |
| ashwin_athani | 0:093612081f64 | 415 | if (device.state != CONFIGURED) |
| ashwin_athani | 0:093612081f64 | 416 | { |
| ashwin_athani | 0:093612081f64 | 417 | /* Endpoint or interface must be zero */ |
| ashwin_athani | 0:093612081f64 | 418 | if (transfer.setup.wIndex != 0) |
| ashwin_athani | 0:093612081f64 | 419 | { |
| ashwin_athani | 0:093612081f64 | 420 | return false; |
| ashwin_athani | 0:093612081f64 | 421 | } |
| ashwin_athani | 0:093612081f64 | 422 | } |
| ashwin_athani | 0:093612081f64 | 423 | |
| ashwin_athani | 0:093612081f64 | 424 | switch (transfer.setup.bmRequestType.Recipient) |
| ashwin_athani | 0:093612081f64 | 425 | { |
| ashwin_athani | 0:093612081f64 | 426 | case DEVICE_RECIPIENT: |
| ashwin_athani | 0:093612081f64 | 427 | /* TODO: Remote wakeup feature not supported */ |
| ashwin_athani | 0:093612081f64 | 428 | break; |
| ashwin_athani | 0:093612081f64 | 429 | case ENDPOINT_RECIPIENT: |
| ashwin_athani | 0:093612081f64 | 430 | if (transfer.setup.wValue == ENDPOINT_HALT) |
| ashwin_athani | 0:093612081f64 | 431 | { |
| ashwin_athani | 0:093612081f64 | 432 | /* TODO: We should check that the endpoint number is valid */ |
| ashwin_athani | 0:093612081f64 | 433 | stallEndpoint(WINDEX_TO_PHYSICAL(transfer.setup.wIndex)); |
| ashwin_athani | 0:093612081f64 | 434 | success = true; |
| ashwin_athani | 0:093612081f64 | 435 | } |
| ashwin_athani | 0:093612081f64 | 436 | break; |
| ashwin_athani | 0:093612081f64 | 437 | default: |
| ashwin_athani | 0:093612081f64 | 438 | break; |
| ashwin_athani | 0:093612081f64 | 439 | } |
| ashwin_athani | 0:093612081f64 | 440 | |
| ashwin_athani | 0:093612081f64 | 441 | return success; |
| ashwin_athani | 0:093612081f64 | 442 | } |
| ashwin_athani | 0:093612081f64 | 443 | |
| ashwin_athani | 0:093612081f64 | 444 | bool usbdevice::requestClearFeature() |
| ashwin_athani | 0:093612081f64 | 445 | { |
| ashwin_athani | 0:093612081f64 | 446 | bool success = false; |
| ashwin_athani | 0:093612081f64 | 447 | |
| ashwin_athani | 0:093612081f64 | 448 | if (device.state != CONFIGURED) |
| ashwin_athani | 0:093612081f64 | 449 | { |
| ashwin_athani | 0:093612081f64 | 450 | /* Endpoint or interface must be zero */ |
| ashwin_athani | 0:093612081f64 | 451 | if (transfer.setup.wIndex != 0) |
| ashwin_athani | 0:093612081f64 | 452 | { |
| ashwin_athani | 0:093612081f64 | 453 | return false; |
| ashwin_athani | 0:093612081f64 | 454 | } |
| ashwin_athani | 0:093612081f64 | 455 | } |
| ashwin_athani | 0:093612081f64 | 456 | |
| ashwin_athani | 0:093612081f64 | 457 | switch (transfer.setup.bmRequestType.Recipient) |
| ashwin_athani | 0:093612081f64 | 458 | { |
| ashwin_athani | 0:093612081f64 | 459 | case DEVICE_RECIPIENT: |
| ashwin_athani | 0:093612081f64 | 460 | /* TODO: Remote wakeup feature not supported */ |
| ashwin_athani | 0:093612081f64 | 461 | break; |
| ashwin_athani | 0:093612081f64 | 462 | case ENDPOINT_RECIPIENT: |
| ashwin_athani | 0:093612081f64 | 463 | /* TODO: We should check that the endpoint number is valid */ |
| ashwin_athani | 0:093612081f64 | 464 | if (transfer.setup.wValue == ENDPOINT_HALT) |
| ashwin_athani | 0:093612081f64 | 465 | { |
| ashwin_athani | 0:093612081f64 | 466 | unstallEndpoint(WINDEX_TO_PHYSICAL(transfer.setup.wIndex)); |
| ashwin_athani | 0:093612081f64 | 467 | success = true; |
| ashwin_athani | 0:093612081f64 | 468 | } |
| ashwin_athani | 0:093612081f64 | 469 | break; |
| ashwin_athani | 0:093612081f64 | 470 | default: |
| ashwin_athani | 0:093612081f64 | 471 | break; |
| ashwin_athani | 0:093612081f64 | 472 | } |
| ashwin_athani | 0:093612081f64 | 473 | |
| ashwin_athani | 0:093612081f64 | 474 | return success; |
| ashwin_athani | 0:093612081f64 | 475 | } |
| ashwin_athani | 0:093612081f64 | 476 | |
| ashwin_athani | 0:093612081f64 | 477 | bool usbdevice::requestGetStatus(void) |
| ashwin_athani | 0:093612081f64 | 478 | { |
| ashwin_athani | 0:093612081f64 | 479 | static unsigned short status; |
| ashwin_athani | 0:093612081f64 | 480 | bool success = false; |
| ashwin_athani | 0:093612081f64 | 481 | |
| ashwin_athani | 0:093612081f64 | 482 | if (device.state != CONFIGURED) |
| ashwin_athani | 0:093612081f64 | 483 | { |
| ashwin_athani | 0:093612081f64 | 484 | /* Endpoint or interface must be zero */ |
| ashwin_athani | 0:093612081f64 | 485 | if (transfer.setup.wIndex != 0) |
| ashwin_athani | 0:093612081f64 | 486 | { |
| ashwin_athani | 0:093612081f64 | 487 | return false; |
| ashwin_athani | 0:093612081f64 | 488 | } |
| ashwin_athani | 0:093612081f64 | 489 | } |
| ashwin_athani | 0:093612081f64 | 490 | |
| ashwin_athani | 0:093612081f64 | 491 | switch (transfer.setup.bmRequestType.Recipient) |
| ashwin_athani | 0:093612081f64 | 492 | { |
| ashwin_athani | 0:093612081f64 | 493 | case DEVICE_RECIPIENT: |
| ashwin_athani | 0:093612081f64 | 494 | /* TODO: Currently only supports self powered devices */ |
| ashwin_athani | 0:093612081f64 | 495 | status = DEVICE_STATUS_SELF_POWERED; |
| ashwin_athani | 0:093612081f64 | 496 | success = true; |
| ashwin_athani | 0:093612081f64 | 497 | break; |
| ashwin_athani | 0:093612081f64 | 498 | case INTERFACE_RECIPIENT: |
| ashwin_athani | 0:093612081f64 | 499 | status = 0; |
| ashwin_athani | 0:093612081f64 | 500 | success = true; |
| ashwin_athani | 0:093612081f64 | 501 | break; |
| ashwin_athani | 0:093612081f64 | 502 | case ENDPOINT_RECIPIENT: |
| ashwin_athani | 0:093612081f64 | 503 | /* TODO: We should check that the endpoint number is valid */ |
| ashwin_athani | 0:093612081f64 | 504 | if (getEndpointStallState(WINDEX_TO_PHYSICAL(transfer.setup.wIndex))) |
| ashwin_athani | 0:093612081f64 | 505 | { |
| ashwin_athani | 0:093612081f64 | 506 | status = ENDPOINT_STATUS_HALT; |
| ashwin_athani | 0:093612081f64 | 507 | } |
| ashwin_athani | 0:093612081f64 | 508 | else |
| ashwin_athani | 0:093612081f64 | 509 | { |
| ashwin_athani | 0:093612081f64 | 510 | status = 0; |
| ashwin_athani | 0:093612081f64 | 511 | } |
| ashwin_athani | 0:093612081f64 | 512 | success = true; |
| ashwin_athani | 0:093612081f64 | 513 | break; |
| ashwin_athani | 0:093612081f64 | 514 | default: |
| ashwin_athani | 0:093612081f64 | 515 | break; |
| ashwin_athani | 0:093612081f64 | 516 | } |
| ashwin_athani | 0:093612081f64 | 517 | |
| ashwin_athani | 0:093612081f64 | 518 | if (success) |
| ashwin_athani | 0:093612081f64 | 519 | { |
| ashwin_athani | 0:093612081f64 | 520 | /* Send the status */ |
| ashwin_athani | 0:093612081f64 | 521 | transfer.ptr = (unsigned char *)&status; /* Assumes little endian */ |
| ashwin_athani | 0:093612081f64 | 522 | transfer.remaining = sizeof(status); |
| ashwin_athani | 0:093612081f64 | 523 | transfer.direction = DEVICE_TO_HOST; |
| ashwin_athani | 0:093612081f64 | 524 | } |
| ashwin_athani | 0:093612081f64 | 525 | |
| ashwin_athani | 0:093612081f64 | 526 | return success; |
| ashwin_athani | 0:093612081f64 | 527 | } |
| ashwin_athani | 0:093612081f64 | 528 | |
| ashwin_athani | 0:093612081f64 | 529 | bool usbdevice::requestGetDescriptor(void) |
| ashwin_athani | 0:093612081f64 | 530 | { |
| ashwin_athani | 0:093612081f64 | 531 | return false; |
| ashwin_athani | 0:093612081f64 | 532 | } |