usb.c

   1 /* USB Keyboard Plus Debug Channel Example for Teensy USB Development Board
   2  * http://www.pjrc.com/teensy/usb_keyboard.html
   3  * Copyright (c) 2009 PJRC.COM, LLC
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy
   6  * of this software and associated documentation files (the "Software"), to deal
   7  * in the Software without restriction, including without limitation the rights
   8  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9  * copies of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in
  13  * all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  21  * THE SOFTWARE.
  22  */
  23
  24 #include <stdint.h>
  25 #include <stdbool.h>
  26 #include <avr/io.h>
  27 #include <avr/pgmspace.h>
  28 #include <avr/interrupt.h>
  29 #include "usb.h"
  30 #include "usb_keyboard.h"
  31 #include "usb_mouse.h"
  32 #include "usb_debug.h"
  33 #include "usb_extra.h"
  34 #include "print.h"
  35 #include "util.h"
  36
  37
  38 /**************************************************************************
  39  *
  40  *  Configurable Options
  41  *
  42  **************************************************************************/
  43
  44 // You can change these to give your code its own name.
  45 #ifndef MANUFACTURER
  46 #   define STR_MANUFACTURER     L"t.m.k."
  47 #else
  48 #   define STR_MANUFACTURER     LSTR(MANUFACTURER)
  49 #endif
  50 #ifndef PRODUCT
  51 #   define STR_PRODUCT          L"t.m.k. keyboard"
  52 #else
  53 #   define STR_PRODUCT          LSTR(PRODUCT)
  54 #endif
  55
  56
  57 // Mac OS-X and Linux automatically load the correct drivers.  On
  58 // Windows, even though the driver is supplied by Microsoft, an
  59 // INF file is needed to load the driver.  These numbers need to
  60 // match the INF file.
  61 #ifndef VENDOR_ID
  62 #   define VENDOR_ID            0xFEED
  63 #endif
  64
  65 #ifndef PRODUCT_ID
  66 #   define PRODUCT_ID           0xBABE
  67 #endif
  68
  69
  70 // USB devices are supposed to implment a halt feature, which is
  71 // rarely (if ever) used.  If you comment this line out, the halt
  72 // code will be removed, saving 102 bytes of space (gcc 4.3.0).
  73 // This is not strictly USB compliant, but works with all major
  74 // operating systems.
  75 #define SUPPORT_ENDPOINT_HALT
  76
  77
  78
  79 /**************************************************************************
  80  *
  81  *  Endpoint Buffer Configuration
  82  *
  83  **************************************************************************/
  84
  85 #define ENDPOINT0_SIZE          32
  86
  87 bool remote_wakeup = false;
  88 bool suspend = false;
  89
  90 // 0:control endpoint is enabled automatically by controller.
  91 static const uint8_t PROGMEM endpoint_config_table[] = {
  92         // enable, UECFG0X(type, direction), UECFG1X(size, bank, allocation)
  93         1, EP_TYPE_INTERRUPT_IN,  EP_SIZE(KBD_SIZE)      | KBD_BUFFER,      // 1
  94 #ifdef USB_MOUSE_ENABLE
  95         1, EP_TYPE_INTERRUPT_IN,  EP_SIZE(MOUSE_SIZE)    | MOUSE_BUFFER,    // 2
  96 #else
  97         0,                                                                  // 2
  98 #endif
  99         1, EP_TYPE_INTERRUPT_IN,  EP_SIZE(DEBUG_TX_SIZE) | DEBUG_TX_BUFFER, // 3
 100 #ifdef USB_EXTRA_ENABLE
 101         1, EP_TYPE_INTERRUPT_IN,  EP_SIZE(EXTRA_SIZE)    | EXTRA_BUFFER,    // 4
 102 #else
 103         0,                                                                  // 4
 104 #endif
 105 #ifdef USB_NKRO_ENABLE
 106         1, EP_TYPE_INTERRUPT_IN,  EP_SIZE(KBD2_SIZE)     | KBD2_BUFFER,     // 5
 107 #else
 108         0,                                                                  // 5
 109 #endif
 110         0,                                                                  // 6
 111 };
 112
 113
 114 /**************************************************************************
 115  *
 116  *  Descriptor Data
 117  *
 118  **************************************************************************/
 119
 120 // Descriptors are the data that your computer reads when it auto-detects
 121 // this USB device (called "enumeration" in USB lingo).  The most commonly
 122 // changed items are editable at the top of this file.  Changing things
 123 // in here should only be done by those who've read chapter 9 of the USB
 124 // spec and relevant portions of any USB class specifications!
 125
 126
 127 static uint8_t PROGMEM device_descriptor[] = {
 128         18,                                     // bLength
 129         1,                                      // bDescriptorType
 130         0x00, 0x02,                             // bcdUSB
 131         0,                                      // bDeviceClass
 132         0,                                      // bDeviceSubClass
 133         0,                                      // bDeviceProtocol
 134         ENDPOINT0_SIZE,                         // bMaxPacketSize0
 135         LSB(VENDOR_ID), MSB(VENDOR_ID),         // idVendor
 136         LSB(PRODUCT_ID), MSB(PRODUCT_ID),       // idProduct
 137         0x00, 0x01,                             // bcdDevice
 138         1,                                      // iManufacturer
 139         2,                                      // iProduct
 140         0,                                      // iSerialNumber
 141         1                                       // bNumConfigurations
 142 };
 143
 144 // Keyboard Protocol 1, HID 1.11 spec, Appendix B, page 59-60
 145 static uint8_t PROGMEM keyboard_hid_report_desc[] = {
 146         0x05, 0x01,          // Usage Page (Generic Desktop),
 147         0x09, 0x06,          // Usage (Keyboard),
 148         0xA1, 0x01,          // Collection (Application),
 149         0x75, 0x01,          //   Report Size (1),
 150         0x95, 0x08,          //   Report Count (8),
 151         0x05, 0x07,          //   Usage Page (Key Codes),
 152         0x19, 0xE0,          //   Usage Minimum (224),
 153         0x29, 0xE7,          //   Usage Maximum (231),
 154         0x15, 0x00,          //   Logical Minimum (0),
 155         0x25, 0x01,          //   Logical Maximum (1),
 156         0x81, 0x02,          //   Input (Data, Variable, Absolute), ;Modifier byte
 157         0x95, 0x01,          //   Report Count (1),
 158         0x75, 0x08,          //   Report Size (8),
 159         0x81, 0x03,          //   Input (Constant),                 ;Reserved byte
 160         0x95, 0x05,          //   Report Count (5),
 161         0x75, 0x01,          //   Report Size (1),
 162         0x05, 0x08,          //   Usage Page (LEDs),
 163         0x19, 0x01,          //   Usage Minimum (1),
 164         0x29, 0x05,          //   Usage Maximum (5),
 165         0x91, 0x02,          //   Output (Data, Variable, Absolute), ;LED report
 166         0x95, 0x01,          //   Report Count (1),
 167         0x75, 0x03,          //   Report Size (3),
 168         0x91, 0x03,          //   Output (Constant),                 ;LED report padding
 169         0x95, KBD_REPORT_KEYS,    //   Report Count (),
 170         0x75, 0x08,          //   Report Size (8),
 171         0x15, 0x00,          //   Logical Minimum (0),
 172         0x25, 0xFF,          //   Logical Maximum(255),
 173         0x05, 0x07,          //   Usage Page (Key Codes),
 174         0x19, 0x00,          //   Usage Minimum (0),
 175         0x29, 0xFF,          //   Usage Maximum (255),
 176         0x81, 0x00,          //   Input (Data, Array),
 177         0xc0                 // End Collection
 178 };
 179 #ifdef USB_NKRO_ENABLE
 180 static uint8_t PROGMEM keyboard2_hid_report_desc[] = {
 181         0x05, 0x01,                     // Usage Page (Generic Desktop),
 182         0x09, 0x06,                     // Usage (Keyboard),
 183         0xA1, 0x01,                     // Collection (Application),
 184         // bitmap of modifiers
 185         0x75, 0x01,                     //   Report Size (1),
 186         0x95, 0x08,                     //   Report Count (8),
 187         0x05, 0x07,                     //   Usage Page (Key Codes),
 188         0x19, 0xE0,                     //   Usage Minimum (224),
 189         0x29, 0xE7,                     //   Usage Maximum (231),
 190         0x15, 0x00,                     //   Logical Minimum (0),
 191         0x25, 0x01,                     //   Logical Maximum (1),
 192         0x81, 0x02,                     //   Input (Data, Variable, Absolute), ;Modifier byte
 193         // LED output report
 194         0x95, 0x05,                     //   Report Count (5),
 195         0x75, 0x01,                     //   Report Size (1),
 196         0x05, 0x08,                     //   Usage Page (LEDs),
 197         0x19, 0x01,                     //   Usage Minimum (1),
 198         0x29, 0x05,                     //   Usage Maximum (5),
 199         0x91, 0x02,                     //   Output (Data, Variable, Absolute),
 200         0x95, 0x01,                     //   Report Count (1),
 201         0x75, 0x03,                     //   Report Size (3),
 202         0x91, 0x03,                     //   Output (Constant),
 203         // bitmap of keys
 204         0x95, KBD2_REPORT_KEYS*8,       //   Report Count (),
 205         0x75, 0x01,                     //   Report Size (1),
 206         0x15, 0x00,                     //   Logical Minimum (0),
 207         0x25, 0x01,                     //   Logical Maximum(1),
 208         0x05, 0x07,                     //   Usage Page (Key Codes),
 209         0x19, 0x00,                     //   Usage Minimum (0),
 210         0x29, KBD2_REPORT_KEYS*8-1,     //   Usage Maximum (),
 211         0x81, 0x02,                     //   Input (Data, Variable, Absolute),
 212         0xc0                            // End Collection
 213 };
 214 #endif
 215
 216 #ifdef USB_MOUSE_ENABLE
 217 // Mouse Protocol 1, HID 1.11 spec, Appendix B, page 59-60, with wheel extension
 218 // http://www.microchip.com/forums/tm.aspx?high=&m=391435&mpage=1#391521
 219 // http://www.keil.com/forum/15671/
 220 // http://www.microsoft.com/whdc/device/input/wheel.mspx
 221 static uint8_t PROGMEM mouse_hid_report_desc[] = {
 222     0x05, 0x01,        // USAGE_PAGE (Generic Desktop)
 223     0x09, 0x02,        // USAGE (Mouse)
 224     0xa1, 0x01,        // COLLECTION (Application)
 225     0x09, 0x02,        //   USAGE (Mouse)
 226     0xa1, 0x02,        //   COLLECTION (Logical)
 227     0x09, 0x01,        //     USAGE (Pointer)
 228     0xa1, 0x00,        //     COLLECTION (Physical)
 229                        // ------------------------------  Buttons
 230     0x05, 0x09,        //       USAGE_PAGE (Button)
 231     0x19, 0x01,        //       USAGE_MINIMUM (Button 1)
 232     0x29, 0x05,        //       USAGE_MAXIMUM (Button 5)
 233     0x15, 0x00,        //       LOGICAL_MINIMUM (0)
 234     0x25, 0x01,        //       LOGICAL_MAXIMUM (1)
 235     0x75, 0x01,        //       REPORT_SIZE (1)
 236     0x95, 0x05,        //       REPORT_COUNT (5)
 237     0x81, 0x02,        //       INPUT (Data,Var,Abs)
 238                        // ------------------------------  Padding
 239     0x75, 0x03,        //       REPORT_SIZE (3)
 240     0x95, 0x01,        //       REPORT_COUNT (1)
 241     0x81, 0x03,        //       INPUT (Cnst,Var,Abs)
 242                        // ------------------------------  X,Y position
 243     0x05, 0x01,        //       USAGE_PAGE (Generic Desktop)
 244     0x09, 0x30,        //       USAGE (X)
 245     0x09, 0x31,        //       USAGE (Y)
 246     0x15, 0x81,        //       LOGICAL_MINIMUM (-127)
 247     0x25, 0x7f,        //       LOGICAL_MAXIMUM (127)
 248     0x75, 0x08,        //       REPORT_SIZE (8)
 249     0x95, 0x02,        //       REPORT_COUNT (2)
 250     0x81, 0x06,        //       INPUT (Data,Var,Rel)
 251     0xa1, 0x02,        //       COLLECTION (Logical)
 252                        // ------------------------------  Vertical wheel res multiplier
 253     0x09, 0x48,        //         USAGE (Resolution Multiplier)
 254     0x15, 0x00,        //         LOGICAL_MINIMUM (0)
 255     0x25, 0x01,        //         LOGICAL_MAXIMUM (1)
 256     0x35, 0x01,        //         PHYSICAL_MINIMUM (1)
 257     0x45, 0x04,        //         PHYSICAL_MAXIMUM (4)
 258     0x75, 0x02,        //         REPORT_SIZE (2)
 259     0x95, 0x01,        //         REPORT_COUNT (1)
 260     0xa4,              //         PUSH
 261     0xb1, 0x02,        //         FEATURE (Data,Var,Abs)
 262                        // ------------------------------  Vertical wheel
 263     0x09, 0x38,        //         USAGE (Wheel)
 264     0x15, 0x81,        //         LOGICAL_MINIMUM (-127)
 265     0x25, 0x7f,        //         LOGICAL_MAXIMUM (127)
 266     0x35, 0x00,        //         PHYSICAL_MINIMUM (0)        - reset physical
 267     0x45, 0x00,        //         PHYSICAL_MAXIMUM (0)
 268     0x75, 0x08,        //         REPORT_SIZE (8)
 269     0x81, 0x06,        //         INPUT (Data,Var,Rel)
 270     0xc0,              //       END_COLLECTION
 271     0xa1, 0x02,        //       COLLECTION (Logical)
 272                        // ------------------------------  Horizontal wheel res multiplier
 273     0x09, 0x48,        //         USAGE (Resolution Multiplier)
 274     0xb4,              //         POP
 275     0xb1, 0x02,        //         FEATURE (Data,Var,Abs)
 276                        // ------------------------------  Padding for Feature report
 277     0x35, 0x00,        //         PHYSICAL_MINIMUM (0)        - reset physical
 278     0x45, 0x00,        //         PHYSICAL_MAXIMUM (0)
 279     0x75, 0x04,        //         REPORT_SIZE (4)
 280     0xb1, 0x03,        //         FEATURE (Cnst,Var,Abs)
 281                        // ------------------------------  Horizontal wheel
 282     0x05, 0x0c,        //         USAGE_PAGE (Consumer Devices)
 283     0x0a, 0x38, 0x02,  //         USAGE (AC Pan)
 284     0x15, 0x81,        //         LOGICAL_MINIMUM (-127)
 285     0x25, 0x7f,        //         LOGICAL_MAXIMUM (127)
 286     0x75, 0x08,        //         REPORT_SIZE (8)
 287     0x81, 0x06,        //         INPUT (Data,Var,Rel)
 288     0xc0,              //       END_COLLECTION
 289     0xc0,              //     END_COLLECTION
 290     0xc0,              //   END_COLLECTION
 291     0xc0               // END_COLLECTION
 292 };
 293 #endif
 294
 295 static uint8_t PROGMEM debug_hid_report_desc[] = {
 296         0x06, 0x31, 0xFF,                       // Usage Page 0xFF31 (vendor defined)
 297         0x09, 0x74,                             // Usage 0x74
 298         0xA1, 0x53,                             // Collection 0x53
 299         0x75, 0x08,                             // report size = 8 bits
 300         0x15, 0x00,                             // logical minimum = 0
 301         0x26, 0xFF, 0x00,                       // logical maximum = 255
 302         0x95, DEBUG_TX_SIZE,                    // report count
 303         0x09, 0x75,                             // usage
 304         0x81, 0x02,                             // Input (array)
 305         0xC0                                    // end collection
 306 };
 307
 308 #ifdef USB_EXTRA_ENABLE
 309 // audio controls & system controls
 310 // http://www.microsoft.com/whdc/archive/w2kbd.mspx
 311 static uint8_t PROGMEM extra_hid_report_desc[] = {
 312     0x05, 0x0c,                    // USAGE_PAGE (Consumer Devices)
 313     0x09, 0x01,                    // USAGE (Consumer Control)
 314     0xa1, 0x01,                    // COLLECTION (Application)
 315     0x85, 0x01,                    //   REPORT_ID (1)
 316     0x09, 0xe9,                    //   USAGE (Volume Up)
 317     0x09, 0xea,                    //   USAGE (Volume Down)
 318     0x15, 0x00,                    //   LOGICAL_MINIMUM (0)
 319     0x25, 0x01,                    //   LOGICAL_MAXIMUM (1)
 320     0x75, 0x01,                    //   REPORT_SIZE (1)
 321     0x95, 0x02,                    //   REPORT_COUNT (2)
 322     0x81, 0x02,                    //   INPUT (Data,Var,Abs)
 323     0x09, 0xe2,                    //   USAGE (Mute)
 324     0x15, 0x00,                    //   LOGICAL_MINIMUM (0)
 325     0x25, 0x01,                    //   LOGICAL_MAXIMUM (1)
 326     0x75, 0x01,                    //   REPORT_SIZE (1)
 327     0x95, 0x01,                    //   REPORT_COUNT (1)
 328     0x81, 0x06,                    //   INPUT (Data,Var,Rel)
 329     0x95, 0x05,                    //   REPORT_COUNT (5)
 330     0x81, 0x07,                    //   INPUT (Cnst,Var,Abs)
 331     0xc0,                          // END_COLLECTION
 332
 333     0x05, 0x01,                    // USAGE_PAGE (Generic Desktop)
 334     0x09, 0x80,                    // USAGE (System Control)
 335     0xa1, 0x01,                    // COLLECTION (Application)
 336     0x85, 0x02,                    //   REPORT_ID (2)
 337     0x19, 0x81,                    //   USAGE_MINIMUM (System Power Down)
 338     0x29, 0x83,                    //   USAGE_MAXIMUM (System Wake Up)
 339     0x95, 0x03,                    //   REPORT_COUNT (3)
 340     0x81, 0x06,                    //   INPUT (Data,Var,Rel)
 341     0x95, 0x05,                    //   REPORT_COUNT (5)
 342     0x81, 0x07,                    //   INPUT (Cnst,Var,Rel)
 343     0xc0                           // END_COLLECTION
 344 };
 345 #endif
 346
 347 #define KBD_HID_DESC_NUM                0
 348 #define KBD_HID_DESC_OFFSET             (9+(9+9+7)*KBD_HID_DESC_NUM+9)
 349
 350 #ifdef USB_MOUSE_ENABLE
 351 #   define MOUSE_HID_DESC_NUM           (KBD_HID_DESC_NUM + 1)
 352 #   define MOUSE_HID_DESC_OFFSET        (9+(9+9+7)*MOUSE_HID_DESC_NUM+9)
 353 #else
 354 #   define MOUSE_HID_DESC_NUM           (KBD_HID_DESC_NUM + 0)
 355 #endif
 356
 357 #define DEBUG_HID_DESC_NUM              (MOUSE_HID_DESC_NUM + 1)
 358 #define DEBUG_HID_DESC_OFFSET           (9+(9+9+7)*DEBUG_HID_DESC_NUM+9)
 359
 360 #ifdef USB_EXTRA_ENABLE
 361 #   define EXTRA_HID_DESC_NUM           (DEBUG_HID_DESC_NUM + 1)
 362 #   define EXTRA_HID_DESC_OFFSET        (9+(9+9+7)*EXTRA_HID_DESC_NUM+9)
 363 #else
 364 #   define EXTRA_HID_DESC_NUM           (DEBUG_HID_DESC_NUM + 0)
 365 #endif
 366
 367 #ifdef USB_NKRO_ENABLE
 368 #   define KBD2_HID_DESC_NUM            (EXTRA_HID_DESC_NUM + 1)
 369 #   define KBD2_HID_DESC_OFFSET         (9+(9+9+7)*EXTRA_HID_DESC_NUM+9)
 370 #else
 371 #   define KBD2_HID_DESC_NUM            (EXTRA_HID_DESC_NUM + 0)
 372 #endif
 373
 374 #define NUM_INTERFACES                  (KBD2_HID_DESC_NUM + 1)
 375 #define CONFIG1_DESC_SIZE               (9+(9+9+7)*NUM_INTERFACES)
 376 static uint8_t PROGMEM config1_descriptor[CONFIG1_DESC_SIZE] = {
 377         // configuration descriptor, USB spec 9.6.3, page 264-266, Table 9-10
 378         9,                                      // bLength;
 379         2,                                      // bDescriptorType;
 380         LSB(CONFIG1_DESC_SIZE),                 // wTotalLength
 381         MSB(CONFIG1_DESC_SIZE),
 382         NUM_INTERFACES,                         // bNumInterfaces
 383         1,                                      // bConfigurationValue
 384         0,                                      // iConfiguration
 385         0xA0,                                   // bmAttributes
 386         50,                                     // bMaxPower
 387
 388         // interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
 389         9,                                      // bLength
 390         4,                                      // bDescriptorType
 391         KBD_INTERFACE,                          // bInterfaceNumber
 392         0,                                      // bAlternateSetting
 393         1,                                      // bNumEndpoints
 394         0x03,                                   // bInterfaceClass (0x03 = HID)
 395         0x01,                                   // bInterfaceSubClass (0x01 = Boot)
 396         0x01,                                   // bInterfaceProtocol (0x01 = Keyboard)
 397         0,                                      // iInterface
 398         // HID descriptor, HID 1.11 spec, section 6.2.1
 399         9,                                      // bLength
 400         0x21,                                   // bDescriptorType
 401         0x11, 0x01,                             // bcdHID
 402         0,                                      // bCountryCode
 403         1,                                      // bNumDescriptors
 404         0x22,                                   // bDescriptorType
 405         sizeof(keyboard_hid_report_desc),       // wDescriptorLength
 406         0,
 407         // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
 408         7,                                      // bLength
 409         5,                                      // bDescriptorType
 410         KBD_ENDPOINT | 0x80,                    // bEndpointAddress
 411         0x03,                                   // bmAttributes (0x03=intr)
 412         KBD_SIZE, 0,                            // wMaxPacketSize
 413         10,                                     // bInterval
 414
 415 #ifdef USB_MOUSE_ENABLE
 416         // interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
 417         9,                                      // bLength
 418         4,                                      // bDescriptorType
 419         MOUSE_INTERFACE,                        // bInterfaceNumber
 420         0,                                      // bAlternateSetting
 421         1,                                      // bNumEndpoints
 422         0x03,                                   // bInterfaceClass (0x03 = HID)
 423         // ThinkPad T23 BIOS doesn't work with boot mouse.
 424         0x00,                                   // bInterfaceSubClass (0x01 = Boot)
 425         0x00,                                   // bInterfaceProtocol (0x02 = Mouse)
 426 /*
 427         0x01,                                   // bInterfaceSubClass (0x01 = Boot)
 428         0x02,                                   // bInterfaceProtocol (0x02 = Mouse)
 429 */
 430         0,                                      // iInterface
 431         // HID descriptor, HID 1.11 spec, section 6.2.1
 432         9,                                      // bLength
 433         0x21,                                   // bDescriptorType
 434         0x11, 0x01,                             // bcdHID
 435         0,                                      // bCountryCode
 436         1,                                      // bNumDescriptors
 437         0x22,                                   // bDescriptorType
 438         sizeof(mouse_hid_report_desc),          // wDescriptorLength
 439         0,
 440         // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
 441         7,                                      // bLength
 442         5,                                      // bDescriptorType
 443         MOUSE_ENDPOINT | 0x80,                  // bEndpointAddress
 444         0x03,                                   // bmAttributes (0x03=intr)
 445         MOUSE_SIZE, 0,                          // wMaxPacketSize
 446         1,                                      // bInterval
 447 #endif
 448
 449         // interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
 450         9,                                      // bLength
 451         4,                                      // bDescriptorType
 452         DEBUG_INTERFACE,                        // bInterfaceNumber
 453         0,                                      // bAlternateSetting
 454         1,                                      // bNumEndpoints
 455         0x03,                                   // bInterfaceClass (0x03 = HID)
 456         0x00,                                   // bInterfaceSubClass
 457         0x00,                                   // bInterfaceProtocol
 458         0,                                      // iInterface
 459         // HID descriptor, HID 1.11 spec, section 6.2.1
 460         9,                                      // bLength
 461         0x21,                                   // bDescriptorType
 462         0x11, 0x01,                             // bcdHID
 463         0,                                      // bCountryCode
 464         1,                                      // bNumDescriptors
 465         0x22,                                   // bDescriptorType
 466         sizeof(debug_hid_report_desc),          // wDescriptorLength
 467         0,
 468         // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
 469         7,                                      // bLength
 470         5,                                      // bDescriptorType
 471         DEBUG_TX_ENDPOINT | 0x80,               // bEndpointAddress
 472         0x03,                                   // bmAttributes (0x03=intr)
 473         DEBUG_TX_SIZE, 0,                       // wMaxPacketSize
 474         1,                                      // bInterval
 475
 476 #ifdef USB_EXTRA_ENABLE
 477         // interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
 478         9,                                      // bLength
 479         4,                                      // bDescriptorType
 480         EXTRA_INTERFACE,                        // bInterfaceNumber
 481         0,                                      // bAlternateSetting
 482         1,                                      // bNumEndpoints
 483         0x03,                                   // bInterfaceClass (0x03 = HID)
 484         0x00,                                   // bInterfaceSubClass
 485         0x00,                                   // bInterfaceProtocol
 486         0,                                      // iInterface
 487         // HID descriptor, HID 1.11 spec, section 6.2.1
 488         9,                                      // bLength
 489         0x21,                                   // bDescriptorType
 490         0x11, 0x01,                             // bcdHID
 491         0,                                      // bCountryCode
 492         1,                                      // bNumDescriptors
 493         0x22,                                   // bDescriptorType
 494         sizeof(extra_hid_report_desc),          // wDescriptorLength
 495         0,
 496         // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
 497         7,                                      // bLength
 498         5,                                      // bDescriptorType
 499         EXTRA_ENDPOINT | 0x80,                  // bEndpointAddress
 500         0x03,                                   // bmAttributes (0x03=intr)
 501         EXTRA_SIZE, 0,                          // wMaxPacketSize
 502         10,                                     // bInterval
 503 #endif
 504
 505 #ifdef USB_NKRO_ENABLE
 506         // interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
 507         9,                                      // bLength
 508         4,                                      // bDescriptorType
 509         KBD2_INTERFACE,                         // bInterfaceNumber
 510         0,                                      // bAlternateSetting
 511         1,                                      // bNumEndpoints
 512         0x03,                                   // bInterfaceClass (0x03 = HID)
 513         0x00,                                   // bInterfaceSubClass (0x01 = Boot)
 514         0x00,                                   // bInterfaceProtocol (0x01 = Keyboard)
 515         0,                                      // iInterface
 516         // HID descriptor, HID 1.11 spec, section 6.2.1
 517         9,                                      // bLength
 518         0x21,                                   // bDescriptorType
 519         0x11, 0x01,                             // bcdHID
 520         0,                                      // bCountryCode
 521         1,                                      // bNumDescriptors
 522         0x22,                                   // bDescriptorType
 523         sizeof(keyboard2_hid_report_desc),      // wDescriptorLength
 524         0,
 525         // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
 526         7,                                      // bLength
 527         5,                                      // bDescriptorType
 528         KBD2_ENDPOINT | 0x80,                   // bEndpointAddress
 529         0x03,                                   // bmAttributes (0x03=intr)
 530         KBD2_SIZE, 0,                           // wMaxPacketSize
 531         1,                                      // bInterval
 532 #endif
 533 };
 534
 535 // If you're desperate for a little extra code memory, these strings
 536 // can be completely removed if iManufacturer, iProduct, iSerialNumber
 537 // in the device desciptor are changed to zeros.
 538 struct usb_string_descriptor_struct {
 539         uint8_t bLength;
 540         uint8_t bDescriptorType;
 541         int16_t wString[];
 542 };
 543 static struct usb_string_descriptor_struct PROGMEM string0 = {
 544         4,
 545         3,
 546         {0x0409}
 547 };
 548 static struct usb_string_descriptor_struct PROGMEM string1 = {
 549         sizeof(STR_MANUFACTURER),
 550         3,
 551         STR_MANUFACTURER
 552 };
 553 static struct usb_string_descriptor_struct PROGMEM string2 = {
 554         sizeof(STR_PRODUCT),
 555         3,
 556         STR_PRODUCT
 557 };
 558
 559 // This table defines which descriptor data is sent for each specific
 560 // request from the host (in wValue and wIndex).
 561 static struct descriptor_list_struct {
 562         uint16_t        wValue;     // descriptor type
 563         uint16_t        wIndex;
 564         const uint8_t   *addr;
 565         uint8_t         length;
 566 } PROGMEM descriptor_list[] = {
 567         // DEVICE descriptor
 568         {0x0100, 0x0000, device_descriptor, sizeof(device_descriptor)},
 569         // CONFIGURATION descriptor
 570         {0x0200, 0x0000, config1_descriptor, sizeof(config1_descriptor)},
 571         // HID/REPORT descriptors
 572         {0x2100, KBD_INTERFACE, config1_descriptor+KBD_HID_DESC_OFFSET, 9},
 573         {0x2200, KBD_INTERFACE, keyboard_hid_report_desc, sizeof(keyboard_hid_report_desc)},
 574 #ifdef USB_MOUSE_ENABLE
 575         {0x2100, MOUSE_INTERFACE, config1_descriptor+MOUSE_HID_DESC_OFFSET, 9},
 576         {0x2200, MOUSE_INTERFACE, mouse_hid_report_desc, sizeof(mouse_hid_report_desc)},
 577 #endif
 578         {0x2100, DEBUG_INTERFACE, config1_descriptor+DEBUG_HID_DESC_OFFSET, 9},
 579         {0x2200, DEBUG_INTERFACE, debug_hid_report_desc, sizeof(debug_hid_report_desc)},
 580 #ifdef USB_EXTRA_ENABLE
 581         {0x2100, EXTRA_INTERFACE, config1_descriptor+EXTRA_HID_DESC_OFFSET, 9},
 582         {0x2200, EXTRA_INTERFACE, extra_hid_report_desc, sizeof(extra_hid_report_desc)},
 583 #endif
 584 #ifdef USB_NKRO_ENABLE
 585         {0x2100, KBD2_INTERFACE, config1_descriptor+KBD2_HID_DESC_OFFSET, 9},
 586         {0x2200, KBD2_INTERFACE, keyboard2_hid_report_desc, sizeof(keyboard2_hid_report_desc)},
 587 #endif
 588         // STRING descriptors
 589         {0x0300, 0x0000, (const uint8_t *)&string0, 4},
 590         {0x0301, 0x0409, (const uint8_t *)&string1, sizeof(STR_MANUFACTURER)},
 591         {0x0302, 0x0409, (const uint8_t *)&string2, sizeof(STR_PRODUCT)}
 592 };
 593 #define NUM_DESC_LIST (sizeof(descriptor_list)/sizeof(struct descriptor_list_struct))
 594
 595
 596 /**************************************************************************
 597  *
 598  *  Variables - these are the only non-stack RAM usage
 599  *
 600  **************************************************************************/
 601
 602 // zero when we are not configured, non-zero when enumerated
 603 static volatile uint8_t usb_configuration=0;
 604
 605
 606 /**************************************************************************
 607  *
 608  *  Public Functions - these are the API intended for the user
 609  *
 610  **************************************************************************/
 611
 612
 613 // initialize USB
 614 void usb_init(void)
 615 {
 616         HW_CONFIG();
 617         USB_FREEZE();                           // enable USB
 618         PLL_CONFIG();                           // config PLL
 619         while (!(PLLCSR & (1<<PLOCK))) ;        // wait for PLL lock
 620         USB_CONFIG();                           // start USB clock
 621         UDCON = 0;                              // enable attach resistor
 622         usb_configuration = 0;
 623         UDIEN = (1<<EORSTE)|(1<<SOFE)|(1<<SUSPE);
 624         sei();
 625 }
 626
 627 // return 0 if the USB is not configured, or the configuration
 628 // number selected by the HOST
 629 uint8_t usb_configured(void)
 630 {
 631         return usb_configuration && !suspend;
 632 }
 633
 634 void usb_remote_wakeup(void)
 635 {
 636     UDCON |= (1<<RMWKUP);
 637 }
 638
 639
 640
 641 /**************************************************************************
 642  *
 643  *  Private Functions - not intended for general user consumption....
 644  *
 645  **************************************************************************/
 646
 647
 648
 649 // USB Device Interrupt - handle all device-level events
 650 // the transmit buffer flushing is triggered by the start of frame
 651 //
 652 ISR(USB_GEN_vect)
 653 {
 654         uint8_t intbits, t, i;
 655         static uint8_t div4=0;
 656
 657         intbits = UDINT;
 658         UDINT = 0;
 659         if (intbits & (1<<SUSPI)) {
 660             suspend = true;
 661         } else {
 662             suspend = false;
 663         }
 664         if (intbits & (1<<EORSTI)) {
 665                 UENUM = 0;
 666                 UECONX = 1;
 667                 UECFG0X = EP_TYPE_CONTROL;
 668                 UECFG1X = EP_SIZE(ENDPOINT0_SIZE) | EP_SINGLE_BUFFER;
 669                 UEIENX = (1<<RXSTPE);
 670                 usb_configuration = 0;
 671         }
 672         if ((intbits & (1<<SOFI)) && usb_configuration) {
 673                 t = debug_flush_timer;
 674                 if (t) {
 675                         debug_flush_timer = -- t;
 676                         if (!t) {
 677                                 UENUM = DEBUG_TX_ENDPOINT;
 678                                 while ((UEINTX & (1<<RWAL))) {
 679                                         UEDATX = 0;
 680                                 }
 681                                 UEINTX = 0x3A;
 682                         }
 683                 }
 684                 if (usb_keyboard_idle_config && (++div4 & 3) == 0) {
 685                         UENUM = KBD_ENDPOINT;
 686                         if (UEINTX & (1<<RWAL)) {
 687                                 usb_keyboard_idle_count++;
 688                                 if (usb_keyboard_idle_count == usb_keyboard_idle_config) {
 689                                         usb_keyboard_idle_count = 0;
 690                                         UEDATX = usb_keyboard_mods;
 691                                         UEDATX = 0;
 692                                         for (i=0; i<6; i++) {
 693                                                 UEDATX = usb_keyboard_keys[i];
 694                                         }
 695                                         UEINTX = 0x3A;
 696                                 }
 697                         }
 698                 }
 699         }
 700 }
 701
 702
 703
 704 // Misc functions to wait for ready and send/receive packets
 705 static inline void usb_wait_in_ready(void)
 706 {
 707         while (!(UEINTX & (1<<TXINI))) ;
 708 }
 709 static inline void usb_send_in(void)
 710 {
 711         UEINTX = ~(1<<TXINI);
 712 }
 713 static inline void usb_wait_receive_out(void)
 714 {
 715         while (!(UEINTX & (1<<RXOUTI))) ;
 716 }
 717 static inline void usb_ack_out(void)
 718 {
 719         UEINTX = ~(1<<RXOUTI);
 720 }
 721
 722
 723
 724 // USB Endpoint Interrupt - endpoint 0 is handled here.  The
 725 // other endpoints are manipulated by the user-callable
 726 // functions, and the start-of-frame interrupt.
 727 //
 728 ISR(USB_COM_vect)
 729 {
 730         uint8_t intbits;
 731         const uint8_t *list;
 732         const uint8_t *cfg;
 733         uint8_t i, n, len, en;
 734         uint8_t bmRequestType;
 735         uint8_t bRequest;
 736         uint16_t wValue;
 737         uint16_t wIndex;
 738         uint16_t wLength;
 739         uint16_t desc_val;
 740         const uint8_t *desc_addr;
 741         uint8_t desc_length;
 742
 743         UENUM = 0;
 744         intbits = UEINTX;
 745         if (intbits & (1<<RXSTPI)) {
 746                 bmRequestType = UEDATX;
 747                 bRequest = UEDATX;
 748                 wValue = UEDATX;
 749                 wValue |= (UEDATX << 8);
 750                 wIndex = UEDATX;
 751                 wIndex |= (UEDATX << 8);
 752                 wLength = UEDATX;
 753                 wLength |= (UEDATX << 8);
 754                 UEINTX = ~((1<<RXSTPI) | (1<<RXOUTI) | (1<<TXINI));
 755                 if (bRequest == GET_DESCRIPTOR) {
 756                         list = (const uint8_t *)descriptor_list;
 757                         for (i=0; ; i++) {
 758                                 if (i >= NUM_DESC_LIST) {
 759                                         UECONX = (1<<STALLRQ)|(1<<EPEN);  //stall
 760                                         return;
 761                                 }
 762                                 desc_val = pgm_read_word(list);
 763                                 if (desc_val != wValue) {
 764                                         list += sizeof(struct descriptor_list_struct);
 765                                         continue;
 766                                 }
 767                                 list += 2;
 768                                 desc_val = pgm_read_word(list);
 769                                 if (desc_val != wIndex) {
 770                                         list += sizeof(struct descriptor_list_struct)-2;
 771                                         continue;
 772                                 }
 773                                 list += 2;
 774                                 desc_addr = (const uint8_t *)pgm_read_word(list);
 775                                 list += 2;
 776                                 desc_length = pgm_read_byte(list);
 777                                 break;
 778                         }
 779                         len = (wLength < 256) ? wLength : 255;
 780                         if (len > desc_length) len = desc_length;
 781                         do {
 782                                 // wait for host ready for IN packet
 783                                 do {
 784                                         i = UEINTX;
 785                                 } while (!(i & ((1<<TXINI)|(1<<RXOUTI))));
 786                                 if (i & (1<<RXOUTI)) return;    // abort
 787                                 // send IN packet
 788                                 n = len < ENDPOINT0_SIZE ? len : ENDPOINT0_SIZE;
 789                                 for (i = n; i; i--) {
 790                                         UEDATX = pgm_read_byte(desc_addr++);
 791                                 }
 792                                 len -= n;
 793                                 usb_send_in();
 794                         } while (len || n == ENDPOINT0_SIZE);
 795                         return;
 796                 }
 797                 if (bRequest == SET_ADDRESS) {
 798                         usb_send_in();
 799                         usb_wait_in_ready();
 800                         UDADDR = wValue | (1<<ADDEN);
 801                         return;
 802                 }
 803                 if (bRequest == SET_CONFIGURATION && bmRequestType == 0) {
 804                         usb_configuration = wValue;
 805                         usb_send_in();
 806                         cfg = endpoint_config_table;
 807                         for (i=1; i<=6; i++) {
 808                                 UENUM = i;
 809                                 en = pgm_read_byte(cfg++);
 810                                 if (en) {
 811                                     UECONX = (1<<EPEN);
 812                                     UECFG0X = pgm_read_byte(cfg++);
 813                                     UECFG1X = pgm_read_byte(cfg++);
 814                                 } else {
 815                                     UECONX = 0;
 816                                 }
 817                         }
 818                         UERST = 0x7E;
 819                         UERST = 0;
 820                         return;
 821                 }
 822                 if (bRequest == GET_CONFIGURATION && bmRequestType == 0x80) {
 823                         usb_wait_in_ready();
 824                         UEDATX = usb_configuration;
 825                         usb_send_in();
 826                         return;
 827                 }
 828
 829                 if (bRequest == GET_STATUS) {
 830                         usb_wait_in_ready();
 831                         i = 0;
 832                         #ifdef SUPPORT_ENDPOINT_HALT
 833                         if (bmRequestType == 0x82) {
 834                                 UENUM = wIndex;
 835                                 if (UECONX & (1<<STALLRQ)) i = 1;
 836                                 UENUM = 0;
 837                         }
 838                         #endif
 839                         UEDATX = i;
 840                         UEDATX = 0;
 841                         usb_send_in();
 842                         return;
 843                 }
 844                 if (bRequest == CLEAR_FEATURE || bRequest == SET_FEATURE) {
 845 #ifdef SUPPORT_ENDPOINT_HALT
 846                     if (bmRequestType == 0x02 && wValue == ENDPOINT_HALT) {
 847                         i = wIndex & 0x7F;
 848                         if (i >= 1 && i <= MAX_ENDPOINT) {
 849                                 usb_send_in();
 850                                 UENUM = i;
 851                                 if (bRequest == SET_FEATURE) {
 852                                         UECONX = (1<<STALLRQ)|(1<<EPEN);
 853                                 } else {
 854                                         UECONX = (1<<STALLRQC)|(1<<RSTDT)|(1<<EPEN);
 855                                         UERST = (1 << i);
 856                                         UERST = 0;
 857                                 }
 858                                 return;
 859                         }
 860                     }
 861 #endif
 862                     if (bmRequestType == 0x00 && wValue == DEVICE_REMOTE_WAKEUP) {
 863                         if (bRequest == SET_FEATURE) {
 864                             remote_wakeup = true;
 865                         } else {
 866                             remote_wakeup = false;
 867                         }
 868                         usb_send_in();
 869                         return;
 870                     }
 871                 }
 872                 if (wIndex == KBD_INTERFACE) {
 873                         if (bmRequestType == 0xA1) {
 874                                 if (bRequest == HID_GET_REPORT) {
 875                                         usb_wait_in_ready();
 876                                         UEDATX = usb_keyboard_mods;
 877                                         UEDATX = 0;
 878                                         for (i=0; i<6; i++) {
 879                                                 UEDATX = usb_keyboard_keys[i];
 880                                         }
 881                                         usb_send_in();
 882                                         return;
 883                                 }
 884                                 if (bRequest == HID_GET_IDLE) {
 885                                         usb_wait_in_ready();
 886                                         UEDATX = usb_keyboard_idle_config;
 887                                         usb_send_in();
 888                                         return;
 889                                 }
 890                                 if (bRequest == HID_GET_PROTOCOL) {
 891                                         usb_wait_in_ready();
 892                                         UEDATX = usb_keyboard_protocol;
 893                                         usb_send_in();
 894                                         return;
 895                                 }
 896                         }
 897                         if (bmRequestType == 0x21) {
 898                                 if (bRequest == HID_SET_REPORT) {
 899                                         usb_wait_receive_out();
 900                                         usb_keyboard_leds = UEDATX;
 901                                         usb_ack_out();
 902                                         usb_send_in();
 903                                         return;
 904                                 }
 905                                 if (bRequest == HID_SET_IDLE) {
 906                                         usb_keyboard_idle_config = (wValue >> 8);
 907                                         usb_keyboard_idle_count = 0;
 908                                         //usb_wait_in_ready();
 909                                         usb_send_in();
 910                                         return;
 911                                 }
 912                                 if (bRequest == HID_SET_PROTOCOL) {
 913                                         usb_keyboard_protocol = wValue;
 914                                         //usb_wait_in_ready();
 915                                         usb_send_in();
 916                                         return;
 917                                 }
 918                         }
 919                 }
 920 #ifdef USB_MOUSE_ENABLE
 921                 if (wIndex == MOUSE_INTERFACE) {
 922                         if (bmRequestType == 0xA1) {
 923                                 if (bRequest == HID_GET_REPORT) {
 924                                     if (wValue == HID_REPORT_INPUT) {
 925                                         usb_wait_in_ready();
 926                                         UEDATX = 0;
 927                                         UEDATX = 0;
 928                                         UEDATX = 0;
 929                                         UEDATX = 0;
 930                                         usb_send_in();
 931                                         return;
 932                                     }
 933                                     if (wValue == HID_REPORT_FEATURE) {
 934                                         usb_wait_in_ready();
 935                                         UEDATX = 0x05;
 936                                         usb_send_in();
 937                                         return;
 938                                     }
 939                                 }
 940                                 if (bRequest == HID_GET_PROTOCOL) {
 941                                         usb_wait_in_ready();
 942                                         UEDATX = usb_mouse_protocol;
 943                                         usb_send_in();
 944                                         return;
 945                                 }
 946                         }
 947                         if (bmRequestType == 0x21) {
 948                                 if (bRequest == HID_SET_PROTOCOL) {
 949                                         usb_mouse_protocol = wValue;
 950                                         usb_send_in();
 951                                         return;
 952                                 }
 953                         }
 954                 }
 955 #endif
 956                 if (wIndex == DEBUG_INTERFACE) {
 957                         if (bRequest == HID_GET_REPORT && bmRequestType == 0xA1) {
 958                                 len = wLength;
 959                                 do {
 960                                         // wait for host ready for IN packet
 961                                         do {
 962                                                 i = UEINTX;
 963                                         } while (!(i & ((1<<TXINI)|(1<<RXOUTI))));
 964                                         if (i & (1<<RXOUTI)) return;    // abort
 965                                         // send IN packet
 966                                         n = len < ENDPOINT0_SIZE ? len : ENDPOINT0_SIZE;
 967                                         for (i = n; i; i--) {
 968                                                 UEDATX = 0;
 969                                         }
 970                                         len -= n;
 971                                         usb_send_in();
 972                                 } while (len || n == ENDPOINT0_SIZE);
 973                                 return;
 974                         }
 975                 }
 976         }
 977         UECONX = (1<<STALLRQ) | (1<<EPEN);      // stall
 978 }