protocol/vusb/vusb.c

   1 /*
   2 Copyright 2011 Jun Wako <wakojun@gmail.com>
   3
   4 This program is free software: you can redistribute it and/or modify
   5 it under the terms of the GNU General Public License as published by
   6 the Free Software Foundation, either version 2 of the License, or
   7 (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18 #include <stdint.h>
  19 #include "usbdrv.h"
  20 #include "usbconfig.h"
  21 #include "host.h"
  22 #include "report.h"
  23 #include "print.h"
  24 #include "debug.h"
  25 #include "host_driver.h"
  26 #include "vusb.h"
  27
  28
  29 static uint8_t vusb_keyboard_leds = 0;
  30 static uint8_t vusb_idle_rate = 0;
  31
  32 /* Keyboard report send buffer */
  33 #define KBUF_SIZE 16
  34 static report_keyboard_t kbuf[KBUF_SIZE];
  35 static uint8_t kbuf_head = 0;
  36 static uint8_t kbuf_tail = 0;
  37
  38
  39 /* transfer keyboard report from buffer */
  40 void vusb_transfer_keyboard(void)
  41 {
  42     if (usbInterruptIsReady()) {
  43         if (kbuf_head != kbuf_tail) {
  44             usbSetInterrupt((void *)&kbuf[kbuf_tail], sizeof(report_keyboard_t));
  45             kbuf_tail = (kbuf_tail + 1) % KBUF_SIZE;
  46             if (debug_keyboard) {
  47                 print("V-USB: kbuf["); pdec(kbuf_tail); print("->"); pdec(kbuf_head); print("](");
  48                 phex((kbuf_head < kbuf_tail) ? (KBUF_SIZE - kbuf_tail + kbuf_head) : (kbuf_head - kbuf_tail));
  49                 print(")\n");
  50             }
  51         }
  52     }
  53 }
  54
  55
  56 /*------------------------------------------------------------------*
  57  * Host driver
  58  *------------------------------------------------------------------*/
  59 static uint8_t keyboard_leds(void);
  60 static void send_keyboard(report_keyboard_t *report);
  61 static void send_mouse(report_mouse_t *report);
  62 static void send_system(uint16_t data);
  63 static void send_consumer(uint16_t data);
  64
  65 static host_driver_t driver = {
  66         keyboard_leds,
  67         send_keyboard,
  68         send_mouse,
  69         send_system,
  70         send_consumer
  71 };
  72
  73 host_driver_t *vusb_driver(void)
  74 {
  75     return &driver;
  76 }
  77
  78 static uint8_t keyboard_leds(void) {
  79     return vusb_keyboard_leds;
  80 }
  81
  82 static void send_keyboard(report_keyboard_t *report)
  83 {
  84     uint8_t next = (kbuf_head + 1) % KBUF_SIZE;
  85     if (next != kbuf_tail) {
  86         kbuf[kbuf_head] = *report;
  87         kbuf_head = next;
  88     } else {
  89         debug("kbuf: full\n");
  90     }
  91 }
  92
  93
  94 typedef struct {
  95     uint8_t report_id;
  96     report_mouse_t report;
  97 } __attribute__ ((packed)) vusb_mouse_report_t;
  98
  99 static void send_mouse(report_mouse_t *report)
 100 {
 101     vusb_mouse_report_t r = {
 102         .report_id = REPORT_ID_MOUSE,
 103         .report = *report
 104     };
 105     if (usbInterruptIsReady3()) {
 106         usbSetInterrupt3((void *)&r, sizeof(vusb_mouse_report_t));
 107     }
 108 }
 109
 110
 111 typedef struct {
 112     uint8_t  report_id;
 113     uint16_t usage;
 114 } __attribute__ ((packed)) report_extra_t;
 115
 116 static void send_system(uint16_t data)
 117 {
 118     static uint16_t last_data = 0;
 119     if (data == last_data) return;
 120     last_data = data;
 121
 122     report_extra_t report = {
 123         .report_id = REPORT_ID_SYSTEM,
 124         .usage = data
 125     };
 126     if (usbInterruptIsReady3()) {
 127         usbSetInterrupt3((void *)&report, sizeof(report));
 128     }
 129 }
 130
 131 static void send_consumer(uint16_t data)
 132 {
 133     static uint16_t last_data = 0;
 134     if (data == last_data) return;
 135     last_data = data;
 136
 137     report_extra_t report = {
 138         .report_id = REPORT_ID_CONSUMER,
 139         .usage = data
 140     };
 141     if (usbInterruptIsReady3()) {
 142         usbSetInterrupt3((void *)&report, sizeof(report));
 143     }
 144 }
 145
 146
 147
 148 /*------------------------------------------------------------------*
 149  * Request from host                                                *
 150  *------------------------------------------------------------------*/
 151 static struct {
 152     uint16_t        len;
 153     enum {
 154         NONE,
 155         SET_LED
 156     }               kind;
 157 } last_req;
 158
 159 usbMsgLen_t usbFunctionSetup(uchar data[8])
 160 {
 161 usbRequest_t    *rq = (void *)data;
 162
 163     if((rq->bmRequestType & USBRQ_TYPE_MASK) == USBRQ_TYPE_CLASS){    /* class request type */
 164         if(rq->bRequest == USBRQ_HID_GET_REPORT){
 165             debug("GET_REPORT:");
 166             /* we only have one report type, so don't look at wValue */
 167             usbMsgPtr = (void *)keyboard_report;
 168             return sizeof(*keyboard_report);
 169         }else if(rq->bRequest == USBRQ_HID_GET_IDLE){
 170             debug("GET_IDLE: ");
 171             //debug_hex(vusb_idle_rate);
 172             usbMsgPtr = &vusb_idle_rate;
 173             return 1;
 174         }else if(rq->bRequest == USBRQ_HID_SET_IDLE){
 175             vusb_idle_rate = rq->wValue.bytes[1];
 176             debug("SET_IDLE: ");
 177             debug_hex(vusb_idle_rate);
 178         }else if(rq->bRequest == USBRQ_HID_SET_REPORT){
 179             debug("SET_REPORT: ");
 180             // Report Type: 0x02(Out)/ReportID: 0x00(none) && Interface: 0(keyboard)
 181             if (rq->wValue.word == 0x0200 && rq->wIndex.word == 0) {
 182                 debug("SET_LED: ");
 183                 last_req.kind = SET_LED;
 184                 last_req.len = rq->wLength.word;
 185             }
 186             return USB_NO_MSG; // to get data in usbFunctionWrite
 187         } else {
 188             debug("UNKNOWN:");
 189         }
 190     }else{
 191         debug("VENDOR:");
 192         /* no vendor specific requests implemented */
 193     }
 194     debug("\n");
 195     return 0;   /* default for not implemented requests: return no data back to host */
 196 }
 197
 198 uchar usbFunctionWrite(uchar *data, uchar len)
 199 {
 200     if (last_req.len == 0) {
 201         return -1;
 202     }
 203     switch (last_req.kind) {
 204         case SET_LED:
 205             debug("SET_LED: ");
 206             debug_hex(data[0]);
 207             debug("\n");
 208             vusb_keyboard_leds = data[0];
 209             last_req.len = 0;
 210             return 1;
 211             break;
 212         case NONE:
 213         default:
 214             return -1;
 215             break;
 216     }
 217     return 1;
 218 }
 219
 220
 221
 222 /*------------------------------------------------------------------*
 223  * Descriptors                                                      *
 224  *------------------------------------------------------------------*/
 225
 226 /*
 227  * Report Descriptor for keyboard
 228  *
 229  * from an example in HID spec appendix
 230  */
 231 PROGMEM uchar keyboard_hid_report[] = {
 232     0x05, 0x01,          // Usage Page (Generic Desktop),
 233     0x09, 0x06,          // Usage (Keyboard),
 234     0xA1, 0x01,          // Collection (Application),
 235     0x75, 0x01,          //   Report Size (1),
 236     0x95, 0x08,          //   Report Count (8),
 237     0x05, 0x07,          //   Usage Page (Key Codes),
 238     0x19, 0xE0,          //   Usage Minimum (224),
 239     0x29, 0xE7,          //   Usage Maximum (231),
 240     0x15, 0x00,          //   Logical Minimum (0),
 241     0x25, 0x01,          //   Logical Maximum (1),
 242     0x81, 0x02,          //   Input (Data, Variable, Absolute), ;Modifier byte
 243     0x95, 0x01,          //   Report Count (1),
 244     0x75, 0x08,          //   Report Size (8),
 245     0x81, 0x03,          //   Input (Constant),                 ;Reserved byte
 246     0x95, 0x05,          //   Report Count (5),
 247     0x75, 0x01,          //   Report Size (1),
 248     0x05, 0x08,          //   Usage Page (LEDs),
 249     0x19, 0x01,          //   Usage Minimum (1),
 250     0x29, 0x05,          //   Usage Maximum (5),
 251     0x91, 0x02,          //   Output (Data, Variable, Absolute), ;LED report
 252     0x95, 0x01,          //   Report Count (1),
 253     0x75, 0x03,          //   Report Size (3),
 254     0x91, 0x03,          //   Output (Constant),                 ;LED report padding
 255     0x95, 0x06,          //   Report Count (6),
 256     0x75, 0x08,          //   Report Size (8),
 257     0x15, 0x00,          //   Logical Minimum (0),
 258     0x25, 0xFF,          //   Logical Maximum(255),
 259     0x05, 0x07,          //   Usage Page (Key Codes),
 260     0x19, 0x00,          //   Usage Minimum (0),
 261     0x29, 0xFF,          //   Usage Maximum (255),
 262     0x81, 0x00,          //   Input (Data, Array),
 263     0xc0                 // End Collection
 264 };
 265
 266 /*
 267  * Report Descriptor for mouse
 268  *
 269  * Mouse Protocol 1, HID 1.11 spec, Appendix B, page 59-60, with wheel extension
 270  * http://www.microchip.com/forums/tm.aspx?high=&m=391435&mpage=1#391521
 271  * http://www.keil.com/forum/15671/
 272  * http://www.microsoft.com/whdc/device/input/wheel.mspx
 273  */
 274 PROGMEM uchar mouse_hid_report[] = {
 275     /* mouse */
 276     0x05, 0x01,                    // USAGE_PAGE (Generic Desktop)
 277     0x09, 0x02,                    // USAGE (Mouse)
 278     0xa1, 0x01,                    // COLLECTION (Application)
 279     0x85, REPORT_ID_MOUSE,         //   REPORT_ID (1)
 280     0x09, 0x01,                    //   USAGE (Pointer)
 281     0xa1, 0x00,                    //   COLLECTION (Physical)
 282                                    // ----------------------------  Buttons
 283     0x05, 0x09,                    //     USAGE_PAGE (Button)
 284     0x19, 0x01,                    //     USAGE_MINIMUM (Button 1)
 285     0x29, 0x05,                    //     USAGE_MAXIMUM (Button 5)
 286     0x15, 0x00,                    //     LOGICAL_MINIMUM (0)
 287     0x25, 0x01,                    //     LOGICAL_MAXIMUM (1)
 288     0x75, 0x01,                    //     REPORT_SIZE (1)
 289     0x95, 0x05,                    //     REPORT_COUNT (5)
 290     0x81, 0x02,                    //     INPUT (Data,Var,Abs)
 291     0x75, 0x03,                    //     REPORT_SIZE (3)
 292     0x95, 0x01,                    //     REPORT_COUNT (1)
 293     0x81, 0x03,                    //     INPUT (Cnst,Var,Abs)
 294                                    // ----------------------------  X,Y position
 295     0x05, 0x01,                    //     USAGE_PAGE (Generic Desktop)
 296     0x09, 0x30,                    //     USAGE (X)
 297     0x09, 0x31,                    //     USAGE (Y)
 298     0x15, 0x81,                    //     LOGICAL_MINIMUM (-127)
 299     0x25, 0x7f,                    //     LOGICAL_MAXIMUM (127)
 300     0x75, 0x08,                    //     REPORT_SIZE (8)
 301     0x95, 0x02,                    //     REPORT_COUNT (2)
 302     0x81, 0x06,                    //     INPUT (Data,Var,Rel)
 303                                    // ----------------------------  Vertical wheel
 304     0x09, 0x38,                    //     USAGE (Wheel)
 305     0x15, 0x81,                    //     LOGICAL_MINIMUM (-127)
 306     0x25, 0x7f,                    //     LOGICAL_MAXIMUM (127)
 307     0x35, 0x00,                    //     PHYSICAL_MINIMUM (0)        - reset physical
 308     0x45, 0x00,                    //     PHYSICAL_MAXIMUM (0)
 309     0x75, 0x08,                    //     REPORT_SIZE (8)
 310     0x95, 0x01,                    //     REPORT_COUNT (1)
 311     0x81, 0x06,                    //     INPUT (Data,Var,Rel)
 312                                    // ----------------------------  Horizontal wheel
 313     0x05, 0x0c,                    //     USAGE_PAGE (Consumer Devices)
 314     0x0a, 0x38, 0x02,              //     USAGE (AC Pan)
 315     0x15, 0x81,                    //     LOGICAL_MINIMUM (-127)
 316     0x25, 0x7f,                    //     LOGICAL_MAXIMUM (127)
 317     0x75, 0x08,                    //     REPORT_SIZE (8)
 318     0x95, 0x01,                    //     REPORT_COUNT (1)
 319     0x81, 0x06,                    //     INPUT (Data,Var,Rel)
 320     0xc0,                          //   END_COLLECTION
 321     0xc0,                          // END_COLLECTION
 322     /* system control */
 323     0x05, 0x01,                    // USAGE_PAGE (Generic Desktop)
 324     0x09, 0x80,                    // USAGE (System Control)
 325     0xa1, 0x01,                    // COLLECTION (Application)
 326     0x85, REPORT_ID_SYSTEM,        //   REPORT_ID (2)
 327     0x15, 0x01,                    //   LOGICAL_MINIMUM (0x1)
 328     0x25, 0xb7,                    //   LOGICAL_MAXIMUM (0xb7)
 329     0x19, 0x01,                    //   USAGE_MINIMUM (0x1)
 330     0x29, 0xb7,                    //   USAGE_MAXIMUM (0xb7)
 331     0x75, 0x10,                    //   REPORT_SIZE (16)
 332     0x95, 0x01,                    //   REPORT_COUNT (1)
 333     0x81, 0x00,                    //   INPUT (Data,Array,Abs)
 334     0xc0,                          // END_COLLECTION
 335     /* consumer */
 336     0x05, 0x0c,                    // USAGE_PAGE (Consumer Devices)
 337     0x09, 0x01,                    // USAGE (Consumer Control)
 338     0xa1, 0x01,                    // COLLECTION (Application)
 339     0x85, REPORT_ID_CONSUMER,      //   REPORT_ID (3)
 340     0x15, 0x01,                    //   LOGICAL_MINIMUM (0x1)
 341     0x26, 0x9c, 0x02,              //   LOGICAL_MAXIMUM (0x29c)
 342     0x19, 0x01,                    //   USAGE_MINIMUM (0x1)
 343     0x2a, 0x9c, 0x02,              //   USAGE_MAXIMUM (0x29c)
 344     0x75, 0x10,                    //   REPORT_SIZE (16)
 345     0x95, 0x01,                    //   REPORT_COUNT (1)
 346     0x81, 0x00,                    //   INPUT (Data,Array,Abs)
 347     0xc0,                          // END_COLLECTION
 348 };
 349
 350
 351 /*
 352  * Descriptor for compite device: Keyboard + Mouse
 353  *
 354  * contains: device, interface, HID and endpoint descriptors
 355  */
 356 #if USB_CFG_DESCR_PROPS_CONFIGURATION
 357 PROGMEM char usbDescriptorConfiguration[] = {    /* USB configuration descriptor */
 358     9,          /* sizeof(usbDescriptorConfiguration): length of descriptor in bytes */
 359     USBDESCR_CONFIG,    /* descriptor type */
 360     9 + (9 + 9 + 7) + (9 + 9 + 7), 0,
 361     //18 + 7 * USB_CFG_HAVE_INTRIN_ENDPOINT + 7 * USB_CFG_HAVE_INTRIN_ENDPOINT3 + 9, 0,
 362                 /* total length of data returned (including inlined descriptors) */
 363     2,          /* number of interfaces in this configuration */
 364     1,          /* index of this configuration */
 365     0,          /* configuration name string index */
 366 #if USB_CFG_IS_SELF_POWERED
 367     (1 << 7) | USBATTR_SELFPOWER,       /* attributes */
 368 #else
 369     (1 << 7),                           /* attributes */
 370 #endif
 371     USB_CFG_MAX_BUS_POWER/2,            /* max USB current in 2mA units */
 372
 373     /*
 374      * Keyboard interface
 375      */
 376     /* Interface descriptor */
 377     9,          /* sizeof(usbDescrInterface): length of descriptor in bytes */
 378     USBDESCR_INTERFACE, /* descriptor type */
 379     0,          /* index of this interface */
 380     0,          /* alternate setting for this interface */
 381     USB_CFG_HAVE_INTRIN_ENDPOINT, /* endpoints excl 0: number of endpoint descriptors to follow */
 382     USB_CFG_INTERFACE_CLASS,
 383     USB_CFG_INTERFACE_SUBCLASS,
 384     USB_CFG_INTERFACE_PROTOCOL,
 385     0,          /* string index for interface */
 386     /* HID descriptor */
 387     9,          /* sizeof(usbDescrHID): length of descriptor in bytes */
 388     USBDESCR_HID,   /* descriptor type: HID */
 389     0x01, 0x01, /* BCD representation of HID version */
 390     0x00,       /* target country code */
 391     0x01,       /* number of HID Report (or other HID class) Descriptor infos to follow */
 392     0x22,       /* descriptor type: report */
 393     sizeof(keyboard_hid_report), 0,  /* total length of report descriptor */
 394     /* Endpoint descriptor */
 395 #if USB_CFG_HAVE_INTRIN_ENDPOINT    /* endpoint descriptor for endpoint 1 */
 396     7,          /* sizeof(usbDescrEndpoint) */
 397     USBDESCR_ENDPOINT,  /* descriptor type = endpoint */
 398     (char)0x81, /* IN endpoint number 1 */
 399     0x03,       /* attrib: Interrupt endpoint */
 400     8, 0,       /* maximum packet size */
 401     USB_CFG_INTR_POLL_INTERVAL, /* in ms */
 402 #endif
 403
 404     /*
 405      * Mouse interface
 406      */
 407     /* Interface descriptor */
 408     9,          /* sizeof(usbDescrInterface): length of descriptor in bytes */
 409     USBDESCR_INTERFACE, /* descriptor type */
 410     1,          /* index of this interface */
 411     0,          /* alternate setting for this interface */
 412     USB_CFG_HAVE_INTRIN_ENDPOINT3, /* endpoints excl 0: number of endpoint descriptors to follow */
 413     0x03,       /* CLASS: HID */
 414     0,          /* SUBCLASS: none */
 415     0,          /* PROTOCOL: none */
 416     0,          /* string index for interface */
 417     /* HID descriptor */
 418     9,          /* sizeof(usbDescrHID): length of descriptor in bytes */
 419     USBDESCR_HID,   /* descriptor type: HID */
 420     0x01, 0x01, /* BCD representation of HID version */
 421     0x00,       /* target country code */
 422     0x01,       /* number of HID Report (or other HID class) Descriptor infos to follow */
 423     0x22,       /* descriptor type: report */
 424     sizeof(mouse_hid_report), 0,  /* total length of report descriptor */
 425 #if USB_CFG_HAVE_INTRIN_ENDPOINT3   /* endpoint descriptor for endpoint 3 */
 426     /* Endpoint descriptor */
 427     7,          /* sizeof(usbDescrEndpoint) */
 428     USBDESCR_ENDPOINT,  /* descriptor type = endpoint */
 429     (char)(0x80 | USB_CFG_EP3_NUMBER), /* IN endpoint number 3 */
 430     0x03,       /* attrib: Interrupt endpoint */
 431     8, 0,       /* maximum packet size */
 432     USB_CFG_INTR_POLL_INTERVAL, /* in ms */
 433 #endif
 434 };
 435 #endif
 436
 437
 438 USB_PUBLIC usbMsgLen_t usbFunctionDescriptor(struct usbRequest *rq)
 439 {
 440     usbMsgLen_t len = 0;
 441
 442 /*
 443     debug("usbFunctionDescriptor: ");
 444     debug_hex(rq->bmRequestType); debug(" ");
 445     debug_hex(rq->bRequest); debug(" ");
 446     debug_hex16(rq->wValue.word); debug(" ");
 447     debug_hex16(rq->wIndex.word); debug(" ");
 448     debug_hex16(rq->wLength.word); debug("\n");
 449 */
 450     switch (rq->wValue.bytes[1]) {
 451 #if USB_CFG_DESCR_PROPS_CONFIGURATION
 452         case USBDESCR_CONFIG:
 453             usbMsgPtr = (unsigned char *)usbDescriptorConfiguration;
 454             len = sizeof(usbDescriptorConfiguration);
 455             break;
 456 #endif
 457         case USBDESCR_HID:
 458             switch (rq->wValue.bytes[0]) {
 459                 case 0:
 460                     usbMsgPtr = (unsigned char *)(usbDescriptorConfiguration + 9 + 9);
 461                     len = 9;
 462                     break;
 463                 case 1:
 464                     usbMsgPtr = (unsigned char *)(usbDescriptorConfiguration + 9 + (9 + 9 + 7) + 9);
 465                     len = 9;
 466                     break;
 467             }
 468             break;
 469         case USBDESCR_HID_REPORT:
 470             /* interface index */
 471             switch (rq->wIndex.word) {
 472                 case 0:
 473                     usbMsgPtr = keyboard_hid_report;
 474                     len = sizeof(keyboard_hid_report);
 475                     break;
 476                 case 1:
 477                     usbMsgPtr = mouse_hid_report;
 478                     len = sizeof(mouse_hid_report);
 479                     break;
 480             }
 481             break;
 482     }
 483     //debug("desc len: "); debug_hex(len); debug("\n");
 484     return len;
 485 }