git.zerfleddert.de Git - fnordlicht-mini/blob - firmware/fnordlicht-controller/usbdrv/usbdrv.h

   1 /* Name: usbdrv.h
   2  * Project: V-USB, virtual USB port for Atmel's(r) AVR(r) microcontrollers
   3  * Author: Christian Starkjohann
   4  * Creation Date: 2004-12-29
   5  * Tabsize: 4
   6  * Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
   7  * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt)
   8  * This Revision: $Id: usbdrv.h 769 2009-08-22 11:49:05Z cs $
   9  */
  10
  11 #ifndef __usbdrv_h_included__
  12 #define __usbdrv_h_included__
  13 #include "usbconfig.h"
  14 #include "usbportability.h"
  15
  16 /*
  17 Hardware Prerequisites:
  18 =======================
  19 USB lines D+ and D- MUST be wired to the same I/O port. We recommend that D+
  20 triggers the interrupt (best achieved by using INT0 for D+), but it is also
  21 possible to trigger the interrupt from D-. If D- is used, interrupts are also
  22 triggered by SOF packets. D- requires a pull-up of 1.5k to +3.5V (and the
  23 device must be powered at 3.5V) to identify as low-speed USB device. A
  24 pull-down or pull-up of 1M SHOULD be connected from D+ to +3.5V to prevent
  25 interference when no USB master is connected. If you use Zener diodes to limit
  26 the voltage on D+ and D-, you MUST use a pull-down resistor, not a pull-up.
  27 We use D+ as interrupt source and not D- because it does not trigger on
  28 keep-alive and RESET states. If you want to count keep-alive events with
  29 USB_COUNT_SOF, you MUST use D- as an interrupt source.
  30
  31 As a compile time option, the 1.5k pull-up resistor on D- can be made
  32 switchable to allow the device to disconnect at will. See the definition of
  33 usbDeviceConnect() and usbDeviceDisconnect() further down in this file.
  34
  35 Please adapt the values in usbconfig.h according to your hardware!
  36
  37 The device MUST be clocked at exactly 12 MHz, 15 MHz, 16 MHz or 20 MHz
  38 or at 12.8 MHz resp. 16.5 MHz +/- 1%. See usbconfig-prototype.h for details.
  39
  40
  41 Limitations:
  42 ============
  43 Robustness with respect to communication errors:
  44 The driver assumes error-free communication. It DOES check for errors in
  45 the PID, but does NOT check bit stuffing errors, SE0 in middle of a byte,
  46 token CRC (5 bit) and data CRC (16 bit). CRC checks can not be performed due
  47 to timing constraints: We must start sending a reply within 7 bit times.
  48 Bit stuffing and misplaced SE0 would have to be checked in real-time, but CPU
  49 performance does not permit that. The driver does not check Data0/Data1
  50 toggling, but application software can implement the check.
  51
  52 Input characteristics:
  53 Since no differential receiver circuit is used, electrical interference
  54 robustness may suffer. The driver samples only one of the data lines with
  55 an ordinary I/O pin's input characteristics. However, since this is only a
  56 low speed USB implementation and the specification allows for 8 times the
  57 bit rate over the same hardware, we should be on the safe side. Even the spec
  58 requires detection of asymmetric states at high bit rate for SE0 detection.
  59
  60 Number of endpoints:
  61 The driver supports the following endpoints:
  62
  63 - Endpoint 0, the default control endpoint.
  64 - Any number of interrupt- or bulk-out endpoints. The data is sent to
  65   usbFunctionWriteOut() and USB_CFG_IMPLEMENT_FN_WRITEOUT must be defined
  66   to 1 to activate this feature. The endpoint number can be found in the
  67   global variable 'usbRxToken'.
  68 - One default interrupt- or bulk-in endpoint. This endpoint is used for
  69   interrupt- or bulk-in transfers which are not handled by any other endpoint.
  70   You must define USB_CFG_HAVE_INTRIN_ENDPOINT in order to activate this
  71   feature and call usbSetInterrupt() to send interrupt/bulk data.
  72 - One additional interrupt- or bulk-in endpoint. This was endpoint 3 in
  73   previous versions of this driver but can now be configured to any endpoint
  74   number. You must define USB_CFG_HAVE_INTRIN_ENDPOINT3 in order to activate
  75   this feature and call usbSetInterrupt3() to send interrupt/bulk data. The
  76   endpoint number can be set with USB_CFG_EP3_NUMBER.
  77
  78 Please note that the USB standard forbids bulk endpoints for low speed devices!
  79 Most operating systems allow them anyway, but the AVR will spend 90% of the CPU
  80 time in the USB interrupt polling for bulk data.
  81
  82 Maximum data payload:
  83 Data payload of control in and out transfers may be up to 254 bytes. In order
  84 to accept payload data of out transfers, you need to implement
  85 'usbFunctionWrite()'.
  86
  87 USB Suspend Mode supply current:
  88 The USB standard limits power consumption to 500uA when the bus is in suspend
  89 mode. This is not a problem for self-powered devices since they don't need
  90 bus power anyway. Bus-powered devices can achieve this only by putting the
  91 CPU in sleep mode. The driver does not implement suspend handling by itself.
  92 However, the application may implement activity monitoring and wakeup from
  93 sleep. The host sends regular SE0 states on the bus to keep it active. These
  94 SE0 states can be detected by using D- as the interrupt source. Define
  95 USB_COUNT_SOF to 1 and use the global variable usbSofCount to check for bus
  96 activity.
  97
  98 Operation without an USB master:
  99 The driver behaves neutral without connection to an USB master if D- reads
 100 as 1. To avoid spurious interrupts, we recommend a high impedance (e.g. 1M)
 101 pull-down or pull-up resistor on D+ (interrupt). If Zener diodes are used,
 102 use a pull-down. If D- becomes statically 0, the driver may block in the
 103 interrupt routine.
 104
 105 Interrupt latency:
 106 The application must ensure that the USB interrupt is not disabled for more
 107 than 25 cycles (this is for 12 MHz, faster clocks allow longer latency).
 108 This implies that all interrupt routines must either be declared as "INTERRUPT"
 109 instead of "SIGNAL" (see "avr/signal.h") or that they are written in assembler
 110 with "sei" as the first instruction.
 111
 112 Maximum interrupt duration / CPU cycle consumption:
 113 The driver handles all USB communication during the interrupt service
 114 routine. The routine will not return before an entire USB message is received
 115 and the reply is sent. This may be up to ca. 1200 cycles @ 12 MHz (= 100us) if
 116 the host conforms to the standard. The driver will consume CPU cycles for all
 117 USB messages, even if they address another (low-speed) device on the same bus.
 118
 119 */
 120
 121 /* ------------------------------------------------------------------------- */
 122 /* --------------------------- Module Interface ---------------------------- */
 123 /* ------------------------------------------------------------------------- */
 124
 125 #define USBDRV_VERSION  20090822
 126 /* This define uniquely identifies a driver version. It is a decimal number
 127  * constructed from the driver's release date in the form YYYYMMDD. If the
 128  * driver's behavior or interface changes, you can use this constant to
 129  * distinguish versions. If it is not defined, the driver's release date is
 130  * older than 2006-01-25.
 131  */
 132
 133
 134 #ifndef USB_PUBLIC
 135 #define USB_PUBLIC
 136 #endif
 137 /* USB_PUBLIC is used as declaration attribute for all functions exported by
 138  * the USB driver. The default is no attribute (see above). You may define it
 139  * to static either in usbconfig.h or from the command line if you include
 140  * usbdrv.c instead of linking against it. Including the C module of the driver
 141  * directly in your code saves a couple of bytes in flash memory.
 142  */
 143
 144 #ifndef __ASSEMBLER__
 145 #ifndef uchar
 146 #define uchar   unsigned char
 147 #endif
 148 #ifndef schar
 149 #define schar   signed char
 150 #endif
 151 /* shortcuts for well defined 8 bit integer types */
 152
 153 #if USB_CFG_LONG_TRANSFERS  /* if more than 254 bytes transfer size required */
 154 #   define usbMsgLen_t unsigned
 155 #else
 156 #   define usbMsgLen_t uchar
 157 #endif
 158 /* usbMsgLen_t is the data type used for transfer lengths. By default, it is
 159  * defined to uchar, allowing a maximum of 254 bytes (255 is reserved for
 160  * USB_NO_MSG below). If the usbconfig.h defines USB_CFG_LONG_TRANSFERS to 1,
 161  * a 16 bit data type is used, allowing up to 16384 bytes (the rest is used
 162  * for flags in the descriptor configuration).
 163  */
 164 #define USB_NO_MSG  ((usbMsgLen_t)-1)   /* constant meaning "no message" */
 165
 166 struct usbRequest;  /* forward declaration */
 167
 168 USB_PUBLIC void usbInit(void);
 169 /* This function must be called before interrupts are enabled and the main
 170  * loop is entered. We exepct that the PORT and DDR bits for D+ and D- have
 171  * not been changed from their default status (which is 0). If you have changed
 172  * them, set both back to 0 (configure them as input with no internal pull-up).
 173  */
 174 USB_PUBLIC void usbPoll(void);
 175 /* This function must be called at regular intervals from the main loop.
 176  * Maximum delay between calls is somewhat less than 50ms (USB timeout for
 177  * accepting a Setup message). Otherwise the device will not be recognized.
 178  * Please note that debug outputs through the UART take ~ 0.5ms per byte
 179  * at 19200 bps.
 180  */
 181 extern uchar *usbMsgPtr;
 182 /* This variable may be used to pass transmit data to the driver from the
 183  * implementation of usbFunctionWrite(). It is also used internally by the
 184  * driver for standard control requests.
 185  */
 186 USB_PUBLIC usbMsgLen_t usbFunctionSetup(uchar data[8]);
 187 /* This function is called when the driver receives a SETUP transaction from
 188  * the host which is not answered by the driver itself (in practice: class and
 189  * vendor requests). All control transfers start with a SETUP transaction where
 190  * the host communicates the parameters of the following (optional) data
 191  * transfer. The SETUP data is available in the 'data' parameter which can
 192  * (and should) be casted to 'usbRequest_t *' for a more user-friendly access
 193  * to parameters.
 194  *
 195  * If the SETUP indicates a control-in transfer, you should provide the
 196  * requested data to the driver. There are two ways to transfer this data:
 197  * (1) Set the global pointer 'usbMsgPtr' to the base of the static RAM data
 198  * block and return the length of the data in 'usbFunctionSetup()'. The driver
 199  * will handle the rest. Or (2) return USB_NO_MSG in 'usbFunctionSetup()'. The
 200  * driver will then call 'usbFunctionRead()' when data is needed. See the
 201  * documentation for usbFunctionRead() for details.
 202  *
 203  * If the SETUP indicates a control-out transfer, the only way to receive the
 204  * data from the host is through the 'usbFunctionWrite()' call. If you
 205  * implement this function, you must return USB_NO_MSG in 'usbFunctionSetup()'
 206  * to indicate that 'usbFunctionWrite()' should be used. See the documentation
 207  * of this function for more information. If you just want to ignore the data
 208  * sent by the host, return 0 in 'usbFunctionSetup()'.
 209  *
 210  * Note that calls to the functions usbFunctionRead() and usbFunctionWrite()
 211  * are only done if enabled by the configuration in usbconfig.h.
 212  */
 213 USB_PUBLIC usbMsgLen_t usbFunctionDescriptor(struct usbRequest *rq);
 214 /* You need to implement this function ONLY if you provide USB descriptors at
 215  * runtime (which is an expert feature). It is very similar to
 216  * usbFunctionSetup() above, but it is called only to request USB descriptor
 217  * data. See the documentation of usbFunctionSetup() above for more info.
 218  */
 219 #if USB_CFG_HAVE_INTRIN_ENDPOINT
 220 USB_PUBLIC void usbSetInterrupt(uchar *data, uchar len);
 221 /* This function sets the message which will be sent during the next interrupt
 222  * IN transfer. The message is copied to an internal buffer and must not exceed
 223  * a length of 8 bytes. The message may be 0 bytes long just to indicate the
 224  * interrupt status to the host.
 225  * If you need to transfer more bytes, use a control read after the interrupt.
 226  */
 227 #define usbInterruptIsReady()   (usbTxLen1 & 0x10)
 228 /* This macro indicates whether the last interrupt message has already been
 229  * sent. If you set a new interrupt message before the old was sent, the
 230  * message already buffered will be lost.
 231  */
 232 #if USB_CFG_HAVE_INTRIN_ENDPOINT3
 233 USB_PUBLIC void usbSetInterrupt3(uchar *data, uchar len);
 234 #define usbInterruptIsReady3()   (usbTxLen3 & 0x10)
 235 /* Same as above for endpoint 3 */
 236 #endif
 237 #endif /* USB_CFG_HAVE_INTRIN_ENDPOINT */
 238 #if USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH    /* simplified interface for backward compatibility */
 239 #define usbHidReportDescriptor  usbDescriptorHidReport
 240 /* should be declared as: PROGMEM char usbHidReportDescriptor[]; */
 241 /* If you implement an HID device, you need to provide a report descriptor.
 242  * The HID report descriptor syntax is a bit complex. If you understand how
 243  * report descriptors are constructed, we recommend that you use the HID
 244  * Descriptor Tool from usb.org, see http://www.usb.org/developers/hidpage/.
 245  * Otherwise you should probably start with a working example.
 246  */
 247 #endif  /* USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH */
 248 #if USB_CFG_IMPLEMENT_FN_WRITE
 249 USB_PUBLIC uchar usbFunctionWrite(uchar *data, uchar len);
 250 /* This function is called by the driver to provide a control transfer's
 251  * payload data (control-out). It is called in chunks of up to 8 bytes. The
 252  * total count provided in the current control transfer can be obtained from
 253  * the 'length' property in the setup data. If an error occurred during
 254  * processing, return 0xff (== -1). The driver will answer the entire transfer
 255  * with a STALL token in this case. If you have received the entire payload
 256  * successfully, return 1. If you expect more data, return 0. If you don't
 257  * know whether the host will send more data (you should know, the total is
 258  * provided in the usbFunctionSetup() call!), return 1.
 259  * NOTE: If you return 0xff for STALL, 'usbFunctionWrite()' may still be called
 260  * for the remaining data. You must continue to return 0xff for STALL in these
 261  * calls.
 262  * In order to get usbFunctionWrite() called, define USB_CFG_IMPLEMENT_FN_WRITE
 263  * to 1 in usbconfig.h and return 0xff in usbFunctionSetup()..
 264  */
 265 #endif /* USB_CFG_IMPLEMENT_FN_WRITE */
 266 #if USB_CFG_IMPLEMENT_FN_READ
 267 USB_PUBLIC uchar usbFunctionRead(uchar *data, uchar len);
 268 /* This function is called by the driver to ask the application for a control
 269  * transfer's payload data (control-in). It is called in chunks of up to 8
 270  * bytes each. You should copy the data to the location given by 'data' and
 271  * return the actual number of bytes copied. If you return less than requested,
 272  * the control-in transfer is terminated. If you return 0xff, the driver aborts
 273  * the transfer with a STALL token.
 274  * In order to get usbFunctionRead() called, define USB_CFG_IMPLEMENT_FN_READ
 275  * to 1 in usbconfig.h and return 0xff in usbFunctionSetup()..
 276  */
 277 #endif /* USB_CFG_IMPLEMENT_FN_READ */
 278
 279 extern uchar usbRxToken;    /* may be used in usbFunctionWriteOut() below */
 280 #if USB_CFG_IMPLEMENT_FN_WRITEOUT
 281 USB_PUBLIC void usbFunctionWriteOut(uchar *data, uchar len);
 282 /* This function is called by the driver when data is received on an interrupt-
 283  * or bulk-out endpoint. The endpoint number can be found in the global
 284  * variable usbRxToken. You must define USB_CFG_IMPLEMENT_FN_WRITEOUT to 1 in
 285  * usbconfig.h to get this function called.
 286  */
 287 #endif /* USB_CFG_IMPLEMENT_FN_WRITEOUT */
 288 #ifdef USB_CFG_PULLUP_IOPORTNAME
 289 #define usbDeviceConnect()      ((USB_PULLUP_DDR |= (1<<USB_CFG_PULLUP_BIT)), \
 290                                   (USB_PULLUP_OUT |= (1<<USB_CFG_PULLUP_BIT)))
 291 #define usbDeviceDisconnect()   ((USB_PULLUP_DDR &= ~(1<<USB_CFG_PULLUP_BIT)), \
 292                                   (USB_PULLUP_OUT &= ~(1<<USB_CFG_PULLUP_BIT)))
 293 #else /* USB_CFG_PULLUP_IOPORTNAME */
 294 #define usbDeviceConnect()      (USBDDR &= ~(1<<USBMINUS))
 295 #define usbDeviceDisconnect()   (USBDDR |= (1<<USBMINUS))
 296 #endif /* USB_CFG_PULLUP_IOPORTNAME */
 297 /* The macros usbDeviceConnect() and usbDeviceDisconnect() (intended to look
 298  * like a function) connect resp. disconnect the device from the host's USB.
 299  * If the constants USB_CFG_PULLUP_IOPORT and USB_CFG_PULLUP_BIT are defined
 300  * in usbconfig.h, a disconnect consists of removing the pull-up resisitor
 301  * from D-, otherwise the disconnect is done by brute-force pulling D- to GND.
 302  * This does not conform to the spec, but it works.
 303  * Please note that the USB interrupt must be disabled while the device is
 304  * in disconnected state, or the interrupt handler will hang! You can either
 305  * turn off the USB interrupt selectively with
 306  *     USB_INTR_ENABLE &= ~(1 << USB_INTR_ENABLE_BIT)
 307  * or use cli() to disable interrupts globally.
 308  */
 309 extern unsigned usbCrc16(unsigned data, uchar len);
 310 #define usbCrc16(data, len) usbCrc16((unsigned)(data), len)
 311 /* This function calculates the binary complement of the data CRC used in
 312  * USB data packets. The value is used to build raw transmit packets.
 313  * You may want to use this function for data checksums or to verify received
 314  * data. We enforce 16 bit calling conventions for compatibility with IAR's
 315  * tiny memory model.
 316  */
 317 extern unsigned usbCrc16Append(unsigned data, uchar len);
 318 #define usbCrc16Append(data, len)    usbCrc16Append((unsigned)(data), len)
 319 /* This function is equivalent to usbCrc16() above, except that it appends
 320  * the 2 bytes CRC (lowbyte first) in the 'data' buffer after reading 'len'
 321  * bytes.
 322  */
 323 #if USB_CFG_HAVE_MEASURE_FRAME_LENGTH
 324 extern unsigned usbMeasureFrameLength(void);
 325 /* This function MUST be called IMMEDIATELY AFTER USB reset and measures 1/7 of
 326  * the number of CPU cycles during one USB frame minus one low speed bit
 327  * length. In other words: return value = 1499 * (F_CPU / 10.5 MHz)
 328  * Since this is a busy wait, you MUST disable all interrupts with cli() before
 329  * calling this function.
 330  * This can be used to calibrate the AVR's RC oscillator.
 331  */
 332 #endif
 333 extern uchar    usbConfiguration;
 334 /* This value contains the current configuration set by the host. The driver
 335  * allows setting and querying of this variable with the USB SET_CONFIGURATION
 336  * and GET_CONFIGURATION requests, but does not use it otherwise.
 337  * You may want to reflect the "configured" status with a LED on the device or
 338  * switch on high power parts of the circuit only if the device is configured.
 339  */
 340 #if USB_COUNT_SOF
 341 extern volatile uchar   usbSofCount;
 342 /* This variable is incremented on every SOF packet. It is only available if
 343  * the macro USB_COUNT_SOF is defined to a value != 0.
 344  */
 345 #endif
 346 #if USB_CFG_CHECK_DATA_TOGGLING
 347 extern uchar    usbCurrentDataToken;
 348 /* This variable can be checked in usbFunctionWrite() and usbFunctionWriteOut()
 349  * to ignore duplicate packets.
 350  */
 351 #endif
 352
 353 #define USB_STRING_DESCRIPTOR_HEADER(stringLength) ((2*(stringLength)+2) | (3<<8))
 354 /* This macro builds a descriptor header for a string descriptor given the
 355  * string's length. See usbdrv.c for an example how to use it.
 356  */
 357 #if USB_CFG_HAVE_FLOWCONTROL
 358 extern volatile schar   usbRxLen;
 359 #define usbDisableAllRequests()     usbRxLen = -1
 360 /* Must be called from usbFunctionWrite(). This macro disables all data input
 361  * from the USB interface. Requests from the host are answered with a NAK
 362  * while they are disabled.
 363  */
 364 #define usbEnableAllRequests()      usbRxLen = 0
 365 /* May only be called if requests are disabled. This macro enables input from
 366  * the USB interface after it has been disabled with usbDisableAllRequests().
 367  */
 368 #define usbAllRequestsAreDisabled() (usbRxLen < 0)
 369 /* Use this macro to find out whether requests are disabled. It may be needed
 370  * to ensure that usbEnableAllRequests() is never called when requests are
 371  * enabled.
 372  */
 373 #endif
 374
 375 #define USB_SET_DATATOKEN1(token)   usbTxBuf1[0] = token
 376 #define USB_SET_DATATOKEN3(token)   usbTxBuf3[0] = token
 377 /* These two macros can be used by application software to reset data toggling
 378  * for interrupt-in endpoints 1 and 3. Since the token is toggled BEFORE
 379  * sending data, you must set the opposite value of the token which should come
 380  * first.
 381  */
 382
 383 #endif  /* __ASSEMBLER__ */
 384
 385
 386 /* ------------------------------------------------------------------------- */
 387 /* ----------------- Definitions for Descriptor Properties ----------------- */
 388 /* ------------------------------------------------------------------------- */
 389 /* This is advanced stuff. See usbconfig-prototype.h for more information
 390  * about the various methods to define USB descriptors. If you do nothing,
 391  * the default descriptors will be used.
 392  */
 393 #define USB_PROP_IS_DYNAMIC     (1 << 14)
 394 /* If this property is set for a descriptor, usbFunctionDescriptor() will be
 395  * used to obtain the particular descriptor. Data directly returned via
 396  * usbMsgPtr are FLASH data by default, combine (OR) with USB_PROP_IS_RAM to
 397  * return RAM data.
 398  */
 399 #define USB_PROP_IS_RAM         (1 << 15)
 400 /* If this property is set for a descriptor, the data is read from RAM
 401  * memory instead of Flash. The property is used for all methods to provide
 402  * external descriptors.
 403  */
 404 #define USB_PROP_LENGTH(len)    ((len) & 0x3fff)
 405 /* If a static external descriptor is used, this is the total length of the
 406  * descriptor in bytes.
 407  */
 408
 409 /* all descriptors which may have properties: */
 410 #ifndef USB_CFG_DESCR_PROPS_DEVICE
 411 #define USB_CFG_DESCR_PROPS_DEVICE                  0
 412 #endif
 413 #ifndef USB_CFG_DESCR_PROPS_CONFIGURATION
 414 #define USB_CFG_DESCR_PROPS_CONFIGURATION           0
 415 #endif
 416 #ifndef USB_CFG_DESCR_PROPS_STRINGS
 417 #define USB_CFG_DESCR_PROPS_STRINGS                 0
 418 #endif
 419 #ifndef USB_CFG_DESCR_PROPS_STRING_0
 420 #define USB_CFG_DESCR_PROPS_STRING_0                0
 421 #endif
 422 #ifndef USB_CFG_DESCR_PROPS_STRING_VENDOR
 423 #define USB_CFG_DESCR_PROPS_STRING_VENDOR           0
 424 #endif
 425 #ifndef USB_CFG_DESCR_PROPS_STRING_PRODUCT
 426 #define USB_CFG_DESCR_PROPS_STRING_PRODUCT          0
 427 #endif
 428 #ifndef USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER
 429 #define USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER    0
 430 #endif
 431 #ifndef USB_CFG_DESCR_PROPS_HID
 432 #define USB_CFG_DESCR_PROPS_HID                     0
 433 #endif
 434 #if !(USB_CFG_DESCR_PROPS_HID_REPORT)
 435 #   undef USB_CFG_DESCR_PROPS_HID_REPORT
 436 #   if USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH /* do some backward compatibility tricks */
 437 #       define USB_CFG_DESCR_PROPS_HID_REPORT       USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH
 438 #   else
 439 #       define USB_CFG_DESCR_PROPS_HID_REPORT       0
 440 #   endif
 441 #endif
 442 #ifndef USB_CFG_DESCR_PROPS_UNKNOWN
 443 #define USB_CFG_DESCR_PROPS_UNKNOWN                 0
 444 #endif
 445
 446 /* ------------------ forward declaration of descriptors ------------------- */
 447 /* If you use external static descriptors, they must be stored in global
 448  * arrays as declared below:
 449  */
 450 #ifndef __ASSEMBLER__
 451 extern
 452 #if !(USB_CFG_DESCR_PROPS_DEVICE & USB_PROP_IS_RAM)
 453 PROGMEM
 454 #endif
 455 char usbDescriptorDevice[];
 456
 457 extern
 458 #if !(USB_CFG_DESCR_PROPS_CONFIGURATION & USB_PROP_IS_RAM)
 459 PROGMEM
 460 #endif
 461 char usbDescriptorConfiguration[];
 462
 463 extern
 464 #if !(USB_CFG_DESCR_PROPS_HID_REPORT & USB_PROP_IS_RAM)
 465 PROGMEM
 466 #endif
 467 char usbDescriptorHidReport[];
 468
 469 extern
 470 #if !(USB_CFG_DESCR_PROPS_STRING_0 & USB_PROP_IS_RAM)
 471 PROGMEM
 472 #endif
 473 char usbDescriptorString0[];
 474
 475 extern
 476 #if !(USB_CFG_DESCR_PROPS_STRING_VENDOR & USB_PROP_IS_RAM)
 477 PROGMEM
 478 #endif
 479 int usbDescriptorStringVendor[];
 480
 481 extern
 482 #if !(USB_CFG_DESCR_PROPS_STRING_PRODUCT & USB_PROP_IS_RAM)
 483 PROGMEM
 484 #endif
 485 int usbDescriptorStringDevice[];
 486
 487 extern
 488 #if !(USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER & USB_PROP_IS_RAM)
 489 PROGMEM
 490 #endif
 491 int usbDescriptorStringSerialNumber[];
 492
 493 #endif /* __ASSEMBLER__ */
 494
 495 /* ------------------------------------------------------------------------- */
 496 /* ------------------------ General Purpose Macros ------------------------- */
 497 /* ------------------------------------------------------------------------- */
 498
 499 #define USB_CONCAT(a, b)            a ## b
 500 #define USB_CONCAT_EXPANDED(a, b)   USB_CONCAT(a, b)
 501
 502 #define USB_OUTPORT(name)           USB_CONCAT(PORT, name)
 503 #define USB_INPORT(name)            USB_CONCAT(PIN, name)
 504 #define USB_DDRPORT(name)           USB_CONCAT(DDR, name)
 505 /* The double-define trick above lets us concatenate strings which are
 506  * defined by macros.
 507  */
 508
 509 /* ------------------------------------------------------------------------- */
 510 /* ------------------------- Constant definitions -------------------------- */
 511 /* ------------------------------------------------------------------------- */
 512
 513 #if !defined __ASSEMBLER__ && (!defined USB_CFG_VENDOR_ID || !defined USB_CFG_DEVICE_ID)
 514 #warning "You should define USB_CFG_VENDOR_ID and USB_CFG_DEVICE_ID in usbconfig.h"
 515 /* If the user has not defined IDs, we default to obdev's free IDs.
 516  * See USB-IDs-for-free.txt for details.
 517  */
 518 #endif
 519
 520 /* make sure we have a VID and PID defined, byte order is lowbyte, highbyte */
 521 #ifndef USB_CFG_VENDOR_ID
 522 #   define  USB_CFG_VENDOR_ID   0xc0, 0x16  /* = 0x16c0 = 5824 = voti.nl */
 523 #endif
 524
 525 #ifndef USB_CFG_DEVICE_ID
 526 #   if USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH
 527 #       define USB_CFG_DEVICE_ID    0xdf, 0x05  /* = 0x5df = 1503, shared PID for HIDs */
 528 #   elif USB_CFG_INTERFACE_CLASS == 2
 529 #       define USB_CFG_DEVICE_ID    0xe1, 0x05  /* = 0x5e1 = 1505, shared PID for CDC Modems */
 530 #   else
 531 #       define USB_CFG_DEVICE_ID    0xdc, 0x05  /* = 0x5dc = 1500, obdev's free PID */
 532 #   endif
 533 #endif
 534
 535 /* Derive Output, Input and DataDirection ports from port names */
 536 #ifndef USB_CFG_IOPORTNAME
 537 #error "You must define USB_CFG_IOPORTNAME in usbconfig.h, see usbconfig-prototype.h"
 538 #endif
 539
 540 #define USBOUT          USB_OUTPORT(USB_CFG_IOPORTNAME)
 541 #define USB_PULLUP_OUT  USB_OUTPORT(USB_CFG_PULLUP_IOPORTNAME)
 542 #define USBIN           USB_INPORT(USB_CFG_IOPORTNAME)
 543 #define USBDDR          USB_DDRPORT(USB_CFG_IOPORTNAME)
 544 #define USB_PULLUP_DDR  USB_DDRPORT(USB_CFG_PULLUP_IOPORTNAME)
 545
 546 #define USBMINUS    USB_CFG_DMINUS_BIT
 547 #define USBPLUS     USB_CFG_DPLUS_BIT
 548 #define USBIDLE     (1<<USB_CFG_DMINUS_BIT) /* value representing J state */
 549 #define USBMASK     ((1<<USB_CFG_DPLUS_BIT) | (1<<USB_CFG_DMINUS_BIT))  /* mask for USB I/O bits */
 550
 551 /* defines for backward compatibility with older driver versions: */
 552 #define USB_CFG_IOPORT          USB_OUTPORT(USB_CFG_IOPORTNAME)
 553 #ifdef USB_CFG_PULLUP_IOPORTNAME
 554 #define USB_CFG_PULLUP_IOPORT   USB_OUTPORT(USB_CFG_PULLUP_IOPORTNAME)
 555 #endif
 556
 557 #ifndef USB_CFG_EP3_NUMBER  /* if not defined in usbconfig.h */
 558 #define USB_CFG_EP3_NUMBER  3
 559 #endif
 560
 561 #ifndef USB_CFG_HAVE_INTRIN_ENDPOINT3
 562 #define USB_CFG_HAVE_INTRIN_ENDPOINT3   0
 563 #endif
 564
 565 #define USB_BUFSIZE     11  /* PID, 8 bytes data, 2 bytes CRC */
 566
 567 /* ----- Try to find registers and bits responsible for ext interrupt 0 ----- */
 568
 569 #ifndef USB_INTR_CFG    /* allow user to override our default */
 570 #   if defined  EICRA
 571 #       define USB_INTR_CFG EICRA
 572 #   else
 573 #       define USB_INTR_CFG MCUCR
 574 #   endif
 575 #endif
 576 #ifndef USB_INTR_CFG_SET    /* allow user to override our default */
 577 #   if defined(USB_COUNT_SOF) || defined(USB_SOF_HOOK)
 578 #       define USB_INTR_CFG_SET (1 << ISC01)                    /* cfg for falling edge */
 579         /* If any SOF logic is used, the interrupt must be wired to D- where
 580          * we better trigger on falling edge
 581          */
 582 #   else
 583 #       define USB_INTR_CFG_SET ((1 << ISC00) | (1 << ISC01))   /* cfg for rising edge */
 584 #   endif
 585 #endif
 586 #ifndef USB_INTR_CFG_CLR    /* allow user to override our default */
 587 #   define USB_INTR_CFG_CLR 0    /* no bits to clear */
 588 #endif
 589
 590 #ifndef USB_INTR_ENABLE     /* allow user to override our default */
 591 #   if defined GIMSK
 592 #       define USB_INTR_ENABLE  GIMSK
 593 #   elif defined EIMSK
 594 #       define USB_INTR_ENABLE  EIMSK
 595 #   else
 596 #       define USB_INTR_ENABLE  GICR
 597 #   endif
 598 #endif
 599 #ifndef USB_INTR_ENABLE_BIT /* allow user to override our default */
 600 #   define USB_INTR_ENABLE_BIT  INT0
 601 #endif
 602
 603 #ifndef USB_INTR_PENDING    /* allow user to override our default */
 604 #   if defined  EIFR
 605 #       define USB_INTR_PENDING EIFR
 606 #   else
 607 #       define USB_INTR_PENDING GIFR
 608 #   endif
 609 #endif
 610 #ifndef USB_INTR_PENDING_BIT    /* allow user to override our default */
 611 #   define USB_INTR_PENDING_BIT INTF0
 612 #endif
 613
 614 /*
 615 The defines above don't work for the following chips
 616 at90c8534: no ISC0?, no PORTB, can't find a data sheet
 617 at86rf401: no PORTB, no MCUCR etc, low clock rate
 618 atmega103: no ISC0? (maybe omission in header, can't find data sheet)
 619 atmega603: not defined in avr-libc
 620 at43usb320, at43usb355, at76c711: have USB anyway
 621 at94k: is different...
 622
 623 at90s1200, attiny11, attiny12, attiny15, attiny28: these have no RAM
 624 */
 625
 626 /* ------------------------------------------------------------------------- */
 627 /* ----------------- USB Specification Constants and Types ----------------- */
 628 /* ------------------------------------------------------------------------- */
 629
 630 /* USB Token values */
 631 #define USBPID_SETUP    0x2d
 632 #define USBPID_OUT      0xe1
 633 #define USBPID_IN       0x69
 634 #define USBPID_DATA0    0xc3
 635 #define USBPID_DATA1    0x4b
 636
 637 #define USBPID_ACK      0xd2
 638 #define USBPID_NAK      0x5a
 639 #define USBPID_STALL    0x1e
 640
 641 #ifndef USB_INITIAL_DATATOKEN
 642 #define USB_INITIAL_DATATOKEN   USBPID_DATA1
 643 #endif
 644
 645 #ifndef __ASSEMBLER__
 646
 647 typedef struct usbTxStatus{
 648     volatile uchar   len;
 649     uchar   buffer[USB_BUFSIZE];
 650 }usbTxStatus_t;
 651
 652 extern usbTxStatus_t   usbTxStatus1, usbTxStatus3;
 653 #define usbTxLen1   usbTxStatus1.len
 654 #define usbTxBuf1   usbTxStatus1.buffer
 655 #define usbTxLen3   usbTxStatus3.len
 656 #define usbTxBuf3   usbTxStatus3.buffer
 657
 658
 659 typedef union usbWord{
 660     unsigned    word;
 661     uchar       bytes[2];
 662 }usbWord_t;
 663
 664 typedef struct usbRequest{
 665     uchar       bmRequestType;
 666     uchar       bRequest;
 667     usbWord_t   wValue;
 668     usbWord_t   wIndex;
 669     usbWord_t   wLength;
 670 }usbRequest_t;
 671 /* This structure matches the 8 byte setup request */
 672 #endif
 673
 674 /* bmRequestType field in USB setup:
 675  * d t t r r r r r, where
 676  * d ..... direction: 0=host->device, 1=device->host
 677  * t ..... type: 0=standard, 1=class, 2=vendor, 3=reserved
 678  * r ..... recipient: 0=device, 1=interface, 2=endpoint, 3=other
 679  */
 680
 681 /* USB setup recipient values */
 682 #define USBRQ_RCPT_MASK         0x1f
 683 #define USBRQ_RCPT_DEVICE       0
 684 #define USBRQ_RCPT_INTERFACE    1
 685 #define USBRQ_RCPT_ENDPOINT     2
 686
 687 /* USB request type values */
 688 #define USBRQ_TYPE_MASK         0x60
 689 #define USBRQ_TYPE_STANDARD     (0<<5)
 690 #define USBRQ_TYPE_CLASS        (1<<5)
 691 #define USBRQ_TYPE_VENDOR       (2<<5)
 692
 693 /* USB direction values: */
 694 #define USBRQ_DIR_MASK              0x80
 695 #define USBRQ_DIR_HOST_TO_DEVICE    (0<<7)
 696 #define USBRQ_DIR_DEVICE_TO_HOST    (1<<7)
 697
 698 /* USB Standard Requests */
 699 #define USBRQ_GET_STATUS        0
 700 #define USBRQ_CLEAR_FEATURE     1
 701 #define USBRQ_SET_FEATURE       3
 702 #define USBRQ_SET_ADDRESS       5
 703 #define USBRQ_GET_DESCRIPTOR    6
 704 #define USBRQ_SET_DESCRIPTOR    7
 705 #define USBRQ_GET_CONFIGURATION 8
 706 #define USBRQ_SET_CONFIGURATION 9
 707 #define USBRQ_GET_INTERFACE     10
 708 #define USBRQ_SET_INTERFACE     11
 709 #define USBRQ_SYNCH_FRAME       12
 710
 711 /* USB descriptor constants */
 712 #define USBDESCR_DEVICE         1
 713 #define USBDESCR_CONFIG         2
 714 #define USBDESCR_STRING         3
 715 #define USBDESCR_INTERFACE      4
 716 #define USBDESCR_ENDPOINT       5
 717 #define USBDESCR_HID            0x21
 718 #define USBDESCR_HID_REPORT     0x22
 719 #define USBDESCR_HID_PHYS       0x23
 720
 721 //#define USBATTR_BUSPOWER        0x80  // USB 1.1 does not define this value any more
 722 #define USBATTR_SELFPOWER       0x40
 723 #define USBATTR_REMOTEWAKE      0x20
 724
 725 /* USB HID Requests */
 726 #define USBRQ_HID_GET_REPORT    0x01
 727 #define USBRQ_HID_GET_IDLE      0x02
 728 #define USBRQ_HID_GET_PROTOCOL  0x03
 729 #define USBRQ_HID_SET_REPORT    0x09
 730 #define USBRQ_HID_SET_IDLE      0x0a
 731 #define USBRQ_HID_SET_PROTOCOL  0x0b
 732
 733 /* ------------------------------------------------------------------------- */
 734
 735 #endif /* __usbdrv_h_included__ */