drivers/usb/gadget/f_hid_rk.c

   1 /*
   2  * f_hid.c -- USB HID function driver
   3  *
   4  * Copyright (C) 2010 Fabien Chouteau <fabien.chouteau@barco.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <linux/kernel.h>
  22 #include <linux/utsname.h>
  23 #include <linux/module.h>
  24 #include <linux/hid.h>
  25 #include <linux/cdev.h>
  26 #include <linux/mutex.h>
  27 #include <linux/poll.h>
  28 #include <linux/uaccess.h>
  29 #include <linux/wait.h>
  30 #include <linux/usb/g_hid.h>
  31
  32
  33
  34 static int major, minors;
  35 static struct class *hidg_class;
  36
  37 /*-------------------------------------------------------------------------*/
  38 /*                            HID gadget struct                            */
  39
  40 struct f_hidg {
  41         /* configuration */
  42         unsigned char                   bInterfaceSubClass;
  43         unsigned char                   bInterfaceProtocol;
  44         unsigned short                  report_desc_length;
  45         char                            *report_desc;
  46         unsigned short                  report_length;
  47
  48         /* recv report */
  49         char                            *set_report_buff;
  50         unsigned short                  set_report_length;
  51         spinlock_t                      spinlock;
  52         wait_queue_head_t               read_queue;
  53         struct usb_request              *req_out;
  54
  55         /* send report */
  56         struct mutex                    lock;
  57         bool                            write_pending;
  58         wait_queue_head_t               write_queue;
  59         struct usb_request              *req;
  60
  61         int                             minor;
  62         struct cdev                     cdev;
  63         struct usb_function             func;
  64         struct usb_ep                   *in_ep;
  65         struct usb_endpoint_descriptor  *fs_in_ep_desc;
  66         struct usb_endpoint_descriptor  *hs_in_ep_desc;
  67         struct usb_endpoint_descriptor  *fs_out_ep_desc;
  68         struct usb_endpoint_descriptor  *hs_out_ep_desc;
  69
  70         unsigned short  bypass_input;
  71         bool connected;
  72 };
  73
  74 static inline struct f_hidg *func_to_hidg(struct usb_function *f)
  75 {
  76         return container_of(f, struct f_hidg, func);
  77 }
  78
  79 /*-------------------------------------------------------------------------*/
  80 /*                           Static descriptors                            */
  81
  82 static struct usb_interface_descriptor hidg_interface_desc = {
  83         .bLength                = sizeof hidg_interface_desc,
  84         .bDescriptorType        = USB_DT_INTERFACE,
  85         /* .bInterfaceNumber    = DYNAMIC */
  86         .bAlternateSetting      = 0,
  87         .bNumEndpoints          = 1,
  88         .bInterfaceClass        = USB_CLASS_HID,
  89         /* .bInterfaceSubClass  = DYNAMIC */
  90         /* .bInterfaceProtocol  = DYNAMIC */
  91         /* .iInterface          = DYNAMIC */
  92 };
  93
  94 static struct hid_descriptor hidg_desc = {
  95         .bLength                        = sizeof hidg_desc,
  96         .bDescriptorType                = HID_DT_HID,
  97         .bcdHID                         = 0x0110, //0x0101,
  98         .bCountryCode                   = 0x00,
  99         .bNumDescriptors                = 0x1,
 100         /*.desc[0].bDescriptorType      = DYNAMIC */
 101         /*.desc[0].wDescriptorLenght    = DYNAMIC */
 102 };
 103
 104 /* High-Speed Support */
 105
 106 static struct usb_endpoint_descriptor hidg_hs_in_ep_desc = {
 107         .bLength                = USB_DT_ENDPOINT_SIZE,
 108         .bDescriptorType        = USB_DT_ENDPOINT,
 109         .bEndpointAddress       = USB_DIR_IN,
 110         .bmAttributes           = USB_ENDPOINT_XFER_INT,
 111         .wMaxPacketSize   = cpu_to_le16(64),
 112         .bInterval              = 4, /* FIXME: Add this field in the
 113                                       * HID gadget configuration?
 114                                       * (struct hidg_func_descriptor)
 115                                       */
 116 };
 117 #if 0
 118 static struct usb_endpoint_descriptor hidg_hs_out_ep_desc = {
 119         .bLength                = USB_DT_ENDPOINT_SIZE,
 120         .bDescriptorType        = USB_DT_ENDPOINT,
 121         .bEndpointAddress       = USB_DIR_OUT|0x02,
 122         .bmAttributes           = USB_ENDPOINT_XFER_INT,
 123         .wMaxPacketSize   = cpu_to_le16(64),
 124         .bInterval              = 4, /* FIXME: Add this field in the
 125                                       * HID gadget configuration?
 126                                       * (struct hidg_func_descriptor)
 127                                       */
 128 };
 129 #endif
 130
 131 static struct usb_descriptor_header *hidg_hs_descriptors[] = {
 132         (struct usb_descriptor_header *)&hidg_interface_desc,
 133         (struct usb_descriptor_header *)&hidg_desc,
 134         (struct usb_descriptor_header *)&hidg_hs_in_ep_desc,
 135         //(struct usb_descriptor_header *)&hidg_hs_out_ep_desc,
 136         NULL,
 137 };
 138
 139 /* Full-Speed Support */
 140
 141 static struct usb_endpoint_descriptor hidg_fs_in_ep_desc = {
 142         .bLength                = USB_DT_ENDPOINT_SIZE,
 143         .bDescriptorType        = USB_DT_ENDPOINT,
 144         .bEndpointAddress       = USB_DIR_IN,
 145         .bmAttributes           = USB_ENDPOINT_XFER_INT,
 146         .wMaxPacketSize = cpu_to_le16(64),
 147         .bInterval              = 10, /* FIXME: Add this field in the
 148                                        * HID gadget configuration?
 149                                        * (struct hidg_func_descriptor)
 150                                        */
 151 };
 152 #if 0
 153 static struct usb_endpoint_descriptor hidg_fs_out_ep_desc = {
 154         .bLength                = USB_DT_ENDPOINT_SIZE,
 155         .bDescriptorType        = USB_DT_ENDPOINT,
 156         .bEndpointAddress       = USB_DIR_OUT|0x02,
 157         .bmAttributes           = USB_ENDPOINT_XFER_INT,
 158         .wMaxPacketSize   = cpu_to_le16(64),
 159         .bInterval              = 10, /* FIXME: Add this field in the
 160                                       * HID gadget configuration?
 161                                       * (struct hidg_func_descriptor)
 162                                       */
 163 };
 164 #endif
 165 static struct usb_descriptor_header *hidg_fs_descriptors[] = {
 166         (struct usb_descriptor_header *)&hidg_interface_desc,
 167         (struct usb_descriptor_header *)&hidg_desc,
 168         (struct usb_descriptor_header *)&hidg_fs_in_ep_desc,
 169         //(struct usb_descriptor_header *)&hidg_fs_out_ep_desc,
 170         NULL,
 171 };
 172
 173 /* hid descriptor for a keyboard */
 174 const struct hidg_func_descriptor my_hid_data = {
 175         .subclass               = 1, /* No subclass */
 176         .protocol               = 2, /* 1-Keyboard,2-mouse */
 177         .report_length          = 64,
 178         .report_desc_length = 150,
 179         .report_desc        = {
 180
 181         0x05, 0x01, /*       USAGE_PAGE (Generic Desktop)         */
 182         0x09, 0x06, /*       USAGE (Keyboard)                     */
 183         0xA1, 0x01, /*       COLLECTION (Application)             */
 184             0x85, 0x01, /*   REPORT ID (0x01)                     */
 185             0x05, 0x07, /*   USAGE_PAGE (Keyboard)                */
 186             0x19, 0xE0, /*   USAGE_MINIMUM (Keyboard LeftControl) */
 187             0x29, 0xE7, /*   USAGE_MAXIMUM (Keyboard Right GUI)   */
 188             0x15, 0x00, /*   LOGICAL_MINIMUM (0)                  */
 189             0x25, 0x01, /*   LOGICAL_MAXIMUM (1)                  */
 190             0x75, 0x01, /*   REPORT_SIZE (1)                      */
 191             0x95, 0x08, /*   REPORT_COUNT (8)                     */
 192             0x81, 0x02, /*   INPUT (Data,Var,Abs)                 */
 193             0x95, 0x01, /*   REPORT_COUNT (1)                     */
 194             0x75, 0x08, /*   REPORT_SIZE (8)                      */
 195             0x81, 0x03, /*   INPUT (Cnst,Var,Abs)                 */
 196             0x95, 0x05, /*   REPORT_COUNT (5)                     */
 197             0x75, 0x01, /*   REPORT_SIZE (1)                      */
 198             0x05, 0x08, /*   USAGE_PAGE (LEDs)                    */
 199             0x19, 0x01, /*   USAGE_MINIMUM (Num Lock)             */
 200             0x29, 0x05, /*   USAGE_MAXIMUM (Kana)                 */
 201             0x91, 0x02, /*   OUTPUT (Data,Var,Abs)                */
 202             0x95, 0x01, /*   REPORT_COUNT (1)                     */
 203             0x75, 0x03, /*   REPORT_SIZE (3)                      */
 204             0x91, 0x03, /*   OUTPUT (Cnst,Var,Abs)                */
 205             0x95, 0x06, /*   REPORT_COUNT (6)                     */
 206             0x75, 0x08, /*   REPORT_SIZE (8)                      */
 207             0x15, 0x00, /*   LOGICAL_MINIMUM (0)                  */
 208             0x25, 0x65, /*   LOGICAL_MAXIMUM (101)                */
 209             0x05, 0x07, /*   USAGE_PAGE (Keyboard)                */
 210             0x19, 0x00, /*   USAGE_MINIMUM (Reserved)             */
 211             0x29, 0x65, /*   USAGE_MAXIMUM (Keyboard Application) */
 212             0x81, 0x00, /*   INPUT (Data,Ary,Abs)                 */
 213         0xC0,           /*   END_COLLECTION                       */
 214
 215         0x05, 0x0C,     /*   USAGE_PAGE (consumer page)           */
 216         0x09, 0x01,     /*   USAGE (consumer control)             */
 217         0xA1, 0x01,     /*   COLLECTION (Application)             */
 218             0x85, 0x03, /*   REPORT ID (0x03)                     */
 219             0x15, 0x00, /*   LOGICAL_MINIMUM (0)                  */
 220             0x26, 0xFF, 0x02, /*  LOGICAL_MAXIMUM (0x2FF)         */
 221             0x19, 0x00, /*   USAGE_MINIMUM (00)                   */
 222             0x2A, 0xFF, 0x02, /*  USAGE_MAXIMUM (0x2FF)           */
 223             0x75, 0x10, /*   REPORT_SIZE (16)                     */
 224             0x95, 0x01, /*   REPORT_COUNT (1)                     */
 225             0x81, 0x00, /*   INPUT (Data,Ary,Abs)                 */
 226         0xC0,
 227
 228         0x05, 0x01,     /*   USAGE_PAGE (Generic Desktop)         */
 229         0x09, 0x02,     /*   USAGE (Mouse)                        */
 230         0xA1, 0x01,     /*   COLLECTION (Application)             */
 231             0x85, 0x02,     /*   REPORT ID (0x02)                 */
 232             0x09, 0x01,     /*   USAGE (Pointer)                  */
 233
 234             0xA1, 0x00,     /*   COLLECTION (Application)         */
 235             0x05, 0x09,     /*   USAGE_PAGE (Button)              */
 236             0x19, 0x01,     /*   USAGE_MINIMUM (Button 1)         */
 237             0x29, 0x08,     /*   USAGE_MAXIMUM (Button 8)         */
 238             0x15, 0x00,     /*   LOGICAL_MINIMUM (0)              */
 239             0x25, 0x01,     /*   LOGICAL_MAXIMUM (1)              */
 240             0x75, 0x01,     /*   REPORT_SIZE (1)                  */
 241             0x95, 0x08,     /*   REPORT_COUNT (8)                 */
 242             0x81, 0x02,     /*   INPUT (Data,Var,Abs)             */
 243             0x05, 0x01,     /*   USAGE_PAGE (Generic Desktop)     */
 244             0x09, 0x30,     /*   USAGE (X)                        */
 245             0x09, 0x31,     /*   USAGE (Y)                        */
 246             0x16, 0x01, 0xF8, /* LOGICAL_MINIMUM (-2047)          */
 247             0x26, 0xFF, 0x07, /* LOGICAL_MAXIMUM (2047)           */
 248             0x75, 0x0C,     /*   REPORT_SIZE (12)                 */
 249             0x95, 0x02,     /*   REPORT_COUNT (2)                 */
 250             0x81, 0x06,     /*   INPUT (Data,Var,Rel)             */
 251             0x09, 0x38,
 252             0x15, 0x81,     /*   LOGICAL_MINIMUM (-127)           */
 253             0x25, 0x7F,     /*   LOGICAL_MAXIMUM (127)            */
 254             0x75, 0x08,     /*   REPORT_SIZE (8)                  */
 255             0x95, 0x01,     /*   REPORT_COUNT (1)                 */
 256             0x81, 0x06,     /*   INPUT (Data,Var,Rel)             */
 257             0xC0 ,          /*   END_COLLECTION                   */
 258
 259         0xC0            /*   END_COLLECTION                       */
 260
 261         },
 262 };
 263
 264 struct f_hidg *g_hidg;
 265
 266 /*-------------------------------------------------------------------------*/
 267 /*                              Char Device                                */
 268
 269 static ssize_t f_hidg_read(struct file *file, char __user *buffer,
 270                         size_t count, loff_t *ptr)
 271 {
 272         struct f_hidg   *hidg     = file->private_data;
 273         char            *tmp_buff = NULL;
 274         unsigned long   flags;
 275
 276         if (!count)
 277                 return 0;
 278
 279         if (!access_ok(VERIFY_WRITE, buffer, count))
 280                 return -EFAULT;
 281
 282         spin_lock_irqsave(&hidg->spinlock, flags);
 283
 284 #define READ_COND (hidg->set_report_buff != NULL)
 285
 286         while (!READ_COND) {
 287                 spin_unlock_irqrestore(&hidg->spinlock, flags);
 288                 if (file->f_flags & O_NONBLOCK)
 289                         return -EAGAIN;
 290
 291                 if (wait_event_interruptible(hidg->read_queue, READ_COND))
 292                         return -ERESTARTSYS;
 293
 294                 spin_lock_irqsave(&hidg->spinlock, flags);
 295         }
 296
 297
 298         count = min_t(unsigned, count, hidg->set_report_length);
 299         tmp_buff = hidg->set_report_buff;
 300         hidg->set_report_buff = NULL;
 301
 302         spin_unlock_irqrestore(&hidg->spinlock, flags);
 303
 304         if (tmp_buff != NULL) {
 305                 /* copy to user outside spinlock */
 306                 count -= copy_to_user(buffer, tmp_buff, count);
 307                 kfree(tmp_buff);
 308         } else
 309                 count = -ENOMEM;
 310
 311         return count;
 312 }
 313
 314 static void f_hidg_req_complete(struct usb_ep *ep, struct usb_request *req)
 315 {
 316         struct f_hidg *hidg = (struct f_hidg *)ep->driver_data;
 317
 318         if (req->status != 0) {
 319                 //ERROR(hidg->func.config->cdev,
 320                 //      "End Point Request ERROR: %d\n", req->status);
 321         }
 322
 323         hidg->write_pending = 0;
 324         wake_up(&hidg->write_queue);
 325 }
 326
 327 #define WRITE_COND (!hidg->write_pending)
 328 static ssize_t f_hidg_write(struct file *file, const char __user *buffer,
 329                             size_t count, loff_t *offp)
 330 {
 331 #if 0
 332         struct f_hidg *hidg  = file->private_data;
 333         ssize_t status = -ENOMEM;
 334
 335         if (!access_ok(VERIFY_READ, buffer, count))
 336                 return -EFAULT;
 337
 338         mutex_lock(&hidg->lock);
 339
 340 #define WRITE_COND (!hidg->write_pending)
 341
 342         /* write queue */
 343         while (!WRITE_COND) {
 344                 mutex_unlock(&hidg->lock);
 345                 if (file->f_flags & O_NONBLOCK)
 346                         return -EAGAIN;
 347
 348                 if (wait_event_interruptible_exclusive(
 349                                 hidg->write_queue, WRITE_COND))
 350                         return -ERESTARTSYS;
 351
 352                 mutex_lock(&hidg->lock);
 353         }
 354
 355         count  = min_t(unsigned, count, hidg->report_length);
 356         status = copy_from_user(hidg->req->buf, buffer, count);
 357
 358         if (status != 0) {
 359                 //ERROR(hidg->func.config->cdev,
 360                 //      "copy_from_user error\n");
 361                 mutex_unlock(&hidg->lock);
 362                 return -EINVAL;
 363         }
 364
 365         hidg->req->status   = 0;
 366         hidg->req->zero     = 0;
 367         hidg->req->length   = count;
 368         hidg->req->complete = f_hidg_req_complete;
 369         hidg->req->context  = hidg;
 370         hidg->write_pending = 1;
 371
 372         status = usb_ep_queue(hidg->in_ep, hidg->req, GFP_ATOMIC);
 373         if (status < 0) {
 374                 //ERROR(hidg->func.config->cdev,
 375                 //      "usb_ep_queue error on int endpoint %zd\n", status);
 376                 hidg->write_pending = 0;
 377                 wake_up(&hidg->write_queue);
 378         } else {
 379                 status = count;
 380         }
 381
 382         mutex_unlock(&hidg->lock);
 383 #endif
 384         return count;
 385 }
 386 static void f_hid_queue_report(u8 *data, int len)
 387 {
 388     //this function will run in interrupt context
 389     ssize_t status = -ENOMEM;
 390     struct f_hidg *hidg = g_hidg;
 391     //static char raw_report[8];
 392
 393     if(hidg){
 394         if(hidg->connected){
 395             //mutex_lock(&hidg->lock);
 396             memcpy(hidg->req->buf, data, len);
 397                 hidg->req->status   = 0;
 398                 hidg->req->zero     = 0;
 399                 hidg->req->length   = len;
 400                 //hidg->req->buf      = raw_report;
 401                 hidg->req->complete = f_hidg_req_complete;
 402                 hidg->req->context  = hidg;
 403
 404                 status = usb_ep_queue(hidg->in_ep, hidg->req, GFP_ATOMIC);
 405                 if (status < 0) {
 406                         printk("usb_ep_queue error on int endpoint %zd\n", status);
 407                 }
 408             }
 409     //mutex_unlock(&hidg->lock);
 410     }
 411 }
 412
 413
 414 #define KBD_REPORT_ID (0x01)
 415 #define MOUSE_REPORT_ID (0x02)
 416 #define CONSUMER_REPORT_ID (0x03)
 417
 418 unsigned int f_hid_bypass_input_get()
 419 {
 420     if(!g_hidg)
 421         return 0;
 422     else
 423         return g_hidg->bypass_input;
 424 }
 425 EXPORT_SYMBOL(f_hid_bypass_input_get);
 426
 427 unsigned char kbd_idle[]     = {KBD_REPORT_ID,0,0,0,0,0,0,0,0};
 428 unsigned char mouse_idle[]   = {MOUSE_REPORT_ID,0,0,0,0,0};
 429 unsigned char consumer_idle[]= {CONSUMER_REPORT_ID,0,0};
 430
 431 static void f_hid_send_idle_report(void)
 432 {
 433     if(g_hidg){
 434         mdelay(2);
 435         f_hid_queue_report(kbd_idle, sizeof(kbd_idle));
 436         mdelay(2);
 437         f_hid_queue_report(mouse_idle, sizeof(mouse_idle));
 438         mdelay(2);
 439         f_hid_queue_report(consumer_idle, sizeof(consumer_idle));
 440     }
 441 }
 442
 443 static void f_hid_bypass_input_set(u8 bypass)
 444 {
 445     if(g_hidg){
 446
 447         u8 current_state = f_hid_bypass_input_get();
 448
 449         if( bypass && (!current_state))
 450         {
 451             g_hidg->bypass_input = 1;
 452         }
 453         if(!bypass && (current_state))
 454         {
 455             f_hid_send_idle_report();
 456             g_hidg->bypass_input = 0;
 457         }
 458     }
 459 }
 460
 461 struct kbd_report {
 462     u8        id;
 463     u8        command;
 464     u8        reserved;
 465     u8        key_array[6];
 466
 467 }__attribute__ ((packed));
 468
 469 struct consumer_report {
 470     u8        id;
 471     u16        data;
 472 }__attribute__ ((packed));
 473
 474 void f_hid_kbd_translate_report(struct hid_report *report, u8 *data)
 475 {
 476     if(f_hid_bypass_input_get())
 477     {
 478         int i,j;
 479         struct kbd_report  k = {0};
 480         struct consumer_report c = {0};
 481
 482         struct hid_field *field;
 483
 484         k.id = KBD_REPORT_ID;//report id
 485         for (i = 0; i < report->maxfield; i++){
 486             field = report->field[i];
 487             if(HID_MAIN_ITEM_VARIABLE & field->flags)//VARIABLE REPORT
 488             {
 489                 for(j = 0; j < field->report_count; j++)
 490                 {
 491                     if((field->usage[j].type == EV_KEY) && (field->usage[j].code == KEY_LEFTCTRL))
 492                         k.command |= field->value[j] ? 1 << 0 : 0 ;
 493                     if((field->usage[j].type == EV_KEY) && (field->usage[j].code == KEY_LEFTSHIFT))
 494                         k.command |= field->value[j] ? 1 << 1 : 0 ;
 495                     if((field->usage[j].type == EV_KEY) && (field->usage[j].code == KEY_LEFTALT))
 496                         k.command |= field->value[j] ? 1 << 2 : 0 ;
 497                     if((field->usage[j].type == EV_KEY) && (field->usage[j].code == KEY_LEFTMETA))
 498                         k.command |= field->value[j] ? 1 << 3 : 0 ;
 499                     if((field->usage[j].type == EV_KEY) && (field->usage[j].code == KEY_RIGHTCTRL))
 500                         k.command |= field->value[j] ? 1 << 4 : 0 ;
 501                     if((field->usage[j].type == EV_KEY) && (field->usage[j].code == KEY_RIGHTSHIFT))
 502                         k.command |= field->value[j] ? 1 << 5 : 0 ;
 503                     if((field->usage[j].type == EV_KEY) && (field->usage[j].code == KEY_RIGHTALT))
 504                         k.command |= field->value[j] ? 1 << 6 : 0 ;
 505                     if((field->usage[j].type == EV_KEY) && (field->usage[j].code == KEY_RIGHTMETA))
 506                         k.command |= field->value[j] ? 1 << 7 : 0 ;
 507                 }
 508             }
 509             else // ARRAY REPORT
 510             {
 511                 if(field->application == HID_GD_KEYBOARD)
 512                 {
 513                     for(j = 0 ; j<(min(6,field->report_count)); j++)
 514                     {
 515                         k.key_array[j] = field->value[j];
 516                     }
 517                 }
 518                 if(field->application == 0x000c0001)//CONSUMER PAGE
 519                 {
 520                     for(j = 0 ; j < (field->report_count); j++)
 521                     {
 522                         c.id = CONSUMER_REPORT_ID;
 523                         c.data = field->value[j];
 524                         f_hid_queue_report((u8 *)&c, sizeof(c));
 525                         return;
 526                     }
 527                 }
 528             }
 529         }
 530         f_hid_queue_report((u8 *)&k, sizeof(k));
 531     }
 532 }
 533 EXPORT_SYMBOL(f_hid_kbd_translate_report);
 534
 535 struct mouse_report {
 536     u8        id:8;
 537     bool      button_left:1;
 538     bool      button_right:1;
 539     bool      button_middle:1;
 540     bool      button_side:1;
 541     bool      button_extra:1;
 542     bool      button_forward:1;
 543     bool      button_back:1;
 544     bool      button_task:1;
 545
 546     signed    x :12;
 547     signed    y :12;
 548     s8        wheel:8;
 549 }__attribute__ ((packed));
 550
 551
 552 void f_hid_mouse_translate_report(struct hid_report *report, u8 *data)
 553 {
 554
 555     if(f_hid_bypass_input_get())
 556     {
 557         struct mouse_report m = {0};
 558         struct hid_field *field;
 559
 560         int i,j;
 561         m.id     = MOUSE_REPORT_ID;
 562         for (i = 0; i < report->maxfield; i++){
 563             field = report->field[i];
 564             for(j=0; j<field->report_count; j++)
 565             {
 566                 if((field->usage[j].type == EV_KEY) && (field->usage[j].code == BTN_LEFT))
 567                     if(field->value[j])
 568                         m.button_left= 1;
 569                 if((field->usage[j].type == EV_KEY) && (field->usage[j].code == BTN_RIGHT))
 570                     if(field->value[j])
 571                         m.button_right= 1;
 572                 if((field->usage[j].type == EV_KEY) && (field->usage[j].code == BTN_MIDDLE))
 573                     if(field->value[j])
 574                         m.button_middle= 1;
 575                 if((field->usage[j].type == EV_KEY) && (field->usage[j].code == BTN_SIDE))
 576                     if(field->value[j])
 577                         m.button_side= 1;
 578                 if((field->usage[j].type == EV_KEY) && (field->usage[j].code == BTN_EXTRA))
 579                     if(field->value[j])
 580                         m.button_extra= 1;
 581                 if((field->usage[j].type == EV_KEY) && (field->usage[j].code == BTN_FORWARD))
 582                     if(field->value[j])
 583                         m.button_forward= 1;
 584                 if((field->usage[j].type == EV_KEY) && (field->usage[j].code == BTN_BACK))
 585                     if(field->value[j])
 586                         m.button_back= 1;
 587                 if((field->usage[j].type == EV_KEY) && (field->usage[j].code == BTN_TASK))
 588                     if(field->value[j])
 589                         m.button_task= 1;
 590
 591
 592                 if((field->usage[j].type == EV_REL) && (field->usage[j].code == REL_X))
 593                     m.x = field->value[j];
 594                 if((field->usage[j].type == EV_REL) && (field->usage[j].code == REL_Y))
 595                     m.y = field->value[j];
 596                 if((field->usage[j].type == EV_REL) && (field->usage[j].code == REL_WHEEL))
 597                     m.wheel= field->value[j];
 598             }
 599         }
 600         f_hid_queue_report((u8 *)&m, sizeof(m));
 601     }
 602 }
 603 EXPORT_SYMBOL(f_hid_mouse_translate_report);
 604
 605 #undef KBD_REPORT_ID
 606 #undef MOUSE_REPORT_ID
 607 #undef CONSUMER_REPORT_ID
 608
 609
 610 static unsigned int f_hidg_poll(struct file *file, poll_table *wait)
 611 {
 612         struct f_hidg   *hidg  = file->private_data;
 613         unsigned int    ret = 0;
 614
 615         poll_wait(file, &hidg->read_queue, wait);
 616         poll_wait(file, &hidg->write_queue, wait);
 617
 618         if (WRITE_COND)
 619                 ret |= POLLOUT | POLLWRNORM;
 620
 621         if (READ_COND)
 622                 ret |= POLLIN | POLLRDNORM;
 623
 624         return ret;
 625 }
 626
 627 #undef WRITE_COND
 628 #undef READ_COND
 629
 630 static int f_hidg_release(struct inode *inode, struct file *fd)
 631 {
 632         fd->private_data = NULL;
 633         return 0;
 634 }
 635
 636 static int f_hidg_open(struct inode *inode, struct file *fd)
 637 {
 638         struct f_hidg *hidg =
 639                 container_of(inode->i_cdev, struct f_hidg, cdev);
 640
 641         fd->private_data = hidg;
 642
 643         return 0;
 644 }
 645
 646 /*-------------------------------------------------------------------------*/
 647 /*                                usb_function                             */
 648
 649 void hidg_connect()
 650 {
 651     if(g_hidg)
 652         g_hidg->connected = 1;
 653 }
 654
 655 void hidg_disconnect()
 656 {
 657     if(g_hidg){
 658         g_hidg->connected = 0;
 659     }
 660 }
 661 DECLARE_DELAYED_WORK(hidg_cnt, hidg_connect);
 662
 663 static void hidg_set_report_complete(struct usb_ep *ep, struct usb_request *req)
 664 {
 665         struct f_hidg *hidg = (struct f_hidg *)req->context;
 666     printk("hidg_set_report_complete ,req->status = %d len = %d\n",
 667     req->status,req->actual);
 668         if (req->status != 0 || req->buf == NULL || req->actual == 0) {
 669                 return;
 670         }
 671
 672         spin_lock(&hidg->spinlock);
 673
 674     if(!hidg->connected)
 675         //schedule_delayed_work(&hidg_cnt, msecs_to_jiffies(200));
 676         hidg_connect();
 677
 678         hidg->set_report_buff = krealloc(hidg->set_report_buff,
 679                                          req->actual, GFP_ATOMIC);
 680
 681         if (hidg->set_report_buff == NULL) {
 682                 spin_unlock(&hidg->spinlock);
 683                 return;
 684         }
 685         hidg->set_report_length = req->actual;
 686         memcpy(hidg->set_report_buff, req->buf, req->actual);
 687
 688         spin_unlock(&hidg->spinlock);
 689
 690         wake_up(&hidg->read_queue);
 691 }
 692
 693 static int hidg_setup(struct usb_function *f,
 694                 const struct usb_ctrlrequest *ctrl)
 695 {
 696         struct f_hidg                   *hidg = func_to_hidg(f);
 697         struct usb_composite_dev        *cdev = f->config->cdev;
 698         struct usb_request              *req  = cdev->req;
 699         int status = 0;
 700         __u16 value, length;
 701
 702         value   = __le16_to_cpu(ctrl->wValue);
 703         length  = __le16_to_cpu(ctrl->wLength);
 704
 705         VDBG(cdev, "hid_setup crtl_request : bRequestType:0x%x bRequest:0x%x "
 706                 "Value:0x%x\n", ctrl->bRequestType, ctrl->bRequest, value);
 707
 708         switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
 709         case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 710                   | HID_REQ_GET_REPORT):
 711                 VDBG(cdev, "get_report\n");
 712
 713                 /* send an empty report */
 714                 length = min_t(unsigned, length, hidg->report_length);
 715                 memset(req->buf, 0x0, length);
 716
 717                 goto respond;
 718                 break;
 719
 720         case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 721                   | HID_REQ_GET_PROTOCOL):
 722                 VDBG(cdev, "get_protocol\n");
 723                 goto stall;
 724                 break;
 725
 726         case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 727                   | HID_REQ_SET_REPORT):
 728                 VDBG(cdev, "set_report | wLenght=%d\n", ctrl->wLength);
 729                 req->context  = hidg;
 730                 req->complete = hidg_set_report_complete;
 731                 goto respond;
 732                 break;
 733
 734         case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 735                   | HID_REQ_SET_PROTOCOL):
 736                 VDBG(cdev, "set_protocol\n");
 737                 goto stall;
 738                 break;
 739
 740         case ((USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_INTERFACE) << 8
 741                   | USB_REQ_GET_DESCRIPTOR):
 742                 switch (value >> 8) {
 743                 case HID_DT_REPORT:
 744                         VDBG(cdev, "USB_REQ_GET_DESCRIPTOR: REPORT\n");
 745                         length = min_t(unsigned short, length,
 746                                                    hidg->report_desc_length);
 747                         memcpy(req->buf, hidg->report_desc, length);
 748                         goto respond;
 749                         break;
 750
 751                 default:
 752                         VDBG(cdev, "Unknown decriptor request 0x%x\n",
 753                                  value >> 8);
 754                         goto stall;
 755                         break;
 756                 }
 757                 break;
 758
 759         default:
 760                 VDBG(cdev, "Unknown request 0x%x\n",
 761                          ctrl->bRequest);
 762                 goto stall;
 763                 break;
 764         }
 765
 766 stall:
 767         return -EOPNOTSUPP;
 768
 769 respond:
 770         req->zero = 0;
 771         req->length = length;
 772         status = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
 773         if (status < 0)
 774                 ;//ERROR(cdev, "usb_ep_queue error on ep0 %d\n", value);
 775         return status;
 776 }
 777
 778 static int hidg_ctrlrequest(struct usb_composite_dev *cdev,
 779                 const struct usb_ctrlrequest *ctrl)
 780 {
 781         struct f_hidg                   *hidg = g_hidg;
 782         struct usb_request              *req  = cdev->req;
 783         int status = 0;
 784         __u16 value, length;
 785
 786         value   = __le16_to_cpu(ctrl->wValue);
 787         length  = __le16_to_cpu(ctrl->wLength);
 788
 789     /*
 790         printk("hid_setup crtl_request : bRequestType:0x%x bRequest:0x%x "
 791                 "Value:0x%x\n", ctrl->bRequestType, ctrl->bRequest, value);
 792     */
 793         switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
 794         case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 795                   | HID_REQ_GET_REPORT):
 796                 VDBG(cdev, "get_report\n");
 797         return -EOPNOTSUPP;
 798
 799                 /* send an empty report */
 800                 length = min_t(unsigned, length, hidg->report_length);
 801                 memset(req->buf, 0x0, length);
 802                 goto respond;
 803                 break;
 804
 805         case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 806                   | HID_REQ_GET_PROTOCOL):
 807                 VDBG(cdev, "get_protocol\n");
 808                 goto stall;
 809                 break;
 810
 811         case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 812                   | HID_REQ_SET_REPORT):
 813                 VDBG(cdev, "set_report | wLenght=%d\n", ctrl->wLength);
 814                 req->context  = hidg;
 815                 req->complete = hidg_set_report_complete;
 816                 goto respond;
 817                 break;
 818
 819         case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 820                   | HID_REQ_SET_PROTOCOL):
 821                 VDBG(cdev, "set_protocol\n");
 822                 goto stall;
 823                 break;
 824
 825         case ((USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_INTERFACE) << 8
 826                   | USB_REQ_GET_DESCRIPTOR):
 827                 switch (value >> 8) {
 828                 case HID_DT_REPORT:
 829                         VDBG(cdev, "USB_REQ_GET_DESCRIPTOR: REPORT\n");
 830                         length = min_t(unsigned short, length,
 831                                                    hidg->report_desc_length);
 832                         memcpy(req->buf, hidg->report_desc, length);
 833                         goto respond;
 834                         break;
 835
 836                 default:
 837                         VDBG(cdev, "Unknown decriptor request 0x%x\n",
 838                                  value >> 8);
 839                         goto stall;
 840                         break;
 841                 }
 842                 break;
 843
 844         default:
 845                 VDBG(cdev, "Unknown request 0x%x\n",
 846                          ctrl->bRequest);
 847                 goto stall;
 848                 break;
 849         }
 850
 851 stall:
 852         return -EOPNOTSUPP;
 853
 854 respond:
 855         req->zero = 0;
 856         req->length = length;
 857         status = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
 858         if (status < 0)
 859                 ;//ERROR(cdev, "usb_ep_queue error on ep0 %d\n", value);
 860         return status;
 861 }
 862
 863 static void hidg_disable(struct usb_function *f)
 864 {
 865         struct f_hidg *hidg = func_to_hidg(f);
 866
 867         usb_ep_disable(hidg->in_ep);
 868         hidg->in_ep->driver_data = NULL;
 869 }
 870
 871 static int hidg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 872 {
 873         struct usb_composite_dev                *cdev = f->config->cdev;
 874         struct f_hidg                           *hidg = func_to_hidg(f);
 875         const struct usb_endpoint_descriptor    *ep_desc;
 876         int status = 0;
 877
 878         VDBG(cdev, "hidg_set_alt intf:%d alt:%d\n", intf, alt);
 879
 880         if (hidg->in_ep != NULL) {
 881                 /* restart endpoint */
 882                 if (hidg->in_ep->driver_data != NULL)
 883                         usb_ep_disable(hidg->in_ep);
 884
 885                 ep_desc = ep_choose(f->config->cdev->gadget,
 886                                 hidg->hs_in_ep_desc, hidg->fs_in_ep_desc);
 887                 status = usb_ep_enable(hidg->in_ep, ep_desc);
 888                 if (status < 0) {
 889                         //ERROR(cdev, "Enable endpoint FAILED!\n");
 890                         goto fail;
 891                 }
 892                 hidg->in_ep->driver_data = hidg;
 893         }
 894 fail:
 895         return status;
 896 }
 897
 898 const struct file_operations f_hidg_fops = {
 899         .owner          = THIS_MODULE,
 900         .open           = f_hidg_open,
 901         .release        = f_hidg_release,
 902         .write          = NULL,//f_hidg_write,disable write to /dev/hidg0
 903         .read           = f_hidg_read,
 904         .poll           = f_hidg_poll,
 905         .llseek         = noop_llseek,
 906 };
 907
 908 static int hidg_bind(struct usb_configuration *c, struct usb_function *f)
 909 {
 910         struct usb_ep           *ep_in;
 911         struct f_hidg           *hidg = func_to_hidg(f);
 912         int                     status;
 913         dev_t                   dev;
 914         /* allocate instance-specific interface IDs, and patch descriptors */
 915         status = usb_interface_id(c, f);
 916         if (status < 0)
 917                 goto fail;
 918         hidg_interface_desc.bInterfaceNumber = status;
 919
 920         /* allocate instance-specific endpoints */
 921         status = -ENODEV;
 922         ep_in = usb_ep_autoconfig(c->cdev->gadget, &hidg_fs_in_ep_desc);
 923         if (!ep_in)
 924                 goto fail;
 925         ep_in->driver_data = c->cdev;   /* claim */
 926         hidg->in_ep = ep_in;
 927 #if 0
 928     /* allocate out endpoint*/
 929         ep_out = usb_ep_autoconfig(c->cdev->gadget, &hidg_fs_out_ep_desc);
 930         if (!ep_out)
 931                 goto fail;
 932         ep_out->driver_data = c->cdev;  /* claim */
 933         hidg->out_ep = ep_out;
 934
 935         printk("ep_out->name = %s\n",ep_out->name);
 936 #endif
 937         /* preallocate request and buffer */
 938         status = -ENOMEM;
 939         hidg->req = usb_ep_alloc_request(hidg->in_ep, GFP_KERNEL);
 940         if (!hidg->req)
 941                 goto fail;
 942
 943
 944         hidg->req->buf = kmalloc(hidg->report_length, GFP_KERNEL);
 945         if (!hidg->req->buf)
 946                 goto fail;
 947
 948         /* set descriptor dynamic values */
 949         hidg_interface_desc.bInterfaceSubClass = hidg->bInterfaceSubClass;
 950         hidg_interface_desc.bInterfaceProtocol = hidg->bInterfaceProtocol;
 951 //      hidg_hs_in_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
 952 //      hidg_fs_in_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
 953 //    hidg_hs_out_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
 954 //      hidg_fs_out_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
 955         hidg_desc.desc[0].bDescriptorType = HID_DT_REPORT;
 956         hidg_desc.desc[0].wDescriptorLength =
 957                 cpu_to_le16(hidg->report_desc_length);
 958
 959         hidg->set_report_buff = NULL;
 960
 961         /* copy descriptors */
 962         f->descriptors = usb_copy_descriptors(hidg_fs_descriptors);
 963         if (!f->descriptors)
 964                 goto fail;
 965
 966         hidg->fs_in_ep_desc = usb_find_endpoint(hidg_fs_descriptors,
 967                                                 f->descriptors,
 968                                                 &hidg_fs_in_ep_desc);
 969
 970         if (gadget_is_dualspeed(c->cdev->gadget)) {
 971                 hidg_hs_in_ep_desc.bEndpointAddress =
 972                         hidg_fs_in_ep_desc.bEndpointAddress;
 973                 f->hs_descriptors = usb_copy_descriptors(hidg_hs_descriptors);
 974                 if (!f->hs_descriptors)
 975                         goto fail;
 976                 hidg->hs_in_ep_desc = usb_find_endpoint(hidg_hs_descriptors,
 977                                                         f->hs_descriptors,
 978                                                         &hidg_hs_in_ep_desc);
 979         } else {
 980                 hidg->hs_in_ep_desc = NULL;
 981         }
 982
 983     hidg->connected = 0;
 984
 985         mutex_init(&hidg->lock);
 986         spin_lock_init(&hidg->spinlock);
 987         init_waitqueue_head(&hidg->write_queue);
 988         init_waitqueue_head(&hidg->read_queue);
 989
 990         /* create char device */
 991         cdev_init(&hidg->cdev, &f_hidg_fops);
 992         dev = MKDEV(major, hidg->minor);
 993         status = cdev_add(&hidg->cdev, dev, 1);
 994         if (status)
 995                 goto fail;
 996
 997         device_create(hidg_class, NULL, dev, NULL, "%s%d", "hidg", hidg->minor);
 998
 999         return 0;
1000
1001 fail:
1002         ;//ERROR(f->config->cdev, "hidg_bind FAILED\n");
1003         if (hidg->req != NULL) {
1004                 kfree(hidg->req->buf);
1005                 if (hidg->in_ep != NULL)
1006                         usb_ep_free_request(hidg->in_ep, hidg->req);
1007         }
1008     g_hidg = NULL;
1009         usb_free_descriptors(f->hs_descriptors);
1010         usb_free_descriptors(f->descriptors);
1011
1012         return status;
1013 }
1014
1015 static void hidg_unbind(struct usb_configuration *c, struct usb_function *f)
1016 {
1017         struct f_hidg *hidg = func_to_hidg(f);
1018
1019     f_hid_bypass_input_set(0);
1020
1021         device_destroy(hidg_class, MKDEV(major, hidg->minor));
1022         cdev_del(&hidg->cdev);
1023
1024         /* disable/free request and end point */
1025         usb_ep_disable(hidg->in_ep);
1026         usb_ep_dequeue(hidg->in_ep, hidg->req);
1027         if(hidg->req->buf)
1028         kfree(hidg->req->buf);
1029         usb_ep_free_request(hidg->in_ep, hidg->req);
1030
1031         /* free descriptors copies */
1032         usb_free_descriptors(f->hs_descriptors);
1033         usb_free_descriptors(f->descriptors);
1034
1035
1036         kfree(hidg->report_desc);
1037         kfree(hidg->set_report_buff);
1038         kfree(hidg);
1039
1040         g_hidg = NULL;
1041 }
1042
1043 /*-------------------------------------------------------------------------*/
1044 /*                                 Strings                                 */
1045
1046 #define CT_FUNC_HID_IDX 0
1047
1048 static struct usb_string ct_func_string_defs[] = {
1049         [CT_FUNC_HID_IDX].s     = "HID Interface",
1050         {},                     /* end of list */
1051 };
1052
1053 static struct usb_gadget_strings ct_func_string_table = {
1054         .language       = 0x0409,       /* en-US */
1055         .strings        = ct_func_string_defs,
1056 };
1057
1058 static struct usb_gadget_strings *ct_func_strings[] = {
1059         &ct_func_string_table,
1060         NULL,
1061 };
1062
1063 /*-------------------------------------------------------------------------*/
1064 /*                             usb_configuration                           */
1065
1066 int hidg_bind_config(struct usb_configuration *c,
1067                             const struct hidg_func_descriptor *fdesc, int index)
1068 {
1069         struct f_hidg *hidg;
1070         int status;
1071         if (index >= minors)
1072                 return -ENOENT;
1073
1074         /* maybe allocate device-global string IDs, and patch descriptors */
1075         if (ct_func_string_defs[CT_FUNC_HID_IDX].id == 0) {
1076                 status = usb_string_id(c->cdev);
1077                 if (status < 0)
1078                         return status;
1079                 ct_func_string_defs[CT_FUNC_HID_IDX].id = status;
1080                 hidg_interface_desc.iInterface = status;
1081         }
1082
1083         /* allocate and initialize one new instance */
1084         hidg = kzalloc(sizeof *hidg, GFP_KERNEL);
1085         if (!hidg)
1086                 return -ENOMEM;
1087         g_hidg = hidg;
1088         hidg->bypass_input = 0;
1089         hidg->minor = index;
1090         hidg->bInterfaceSubClass = fdesc->subclass;
1091         hidg->bInterfaceProtocol = fdesc->protocol;
1092         hidg->report_length = fdesc->report_length;
1093         hidg->report_desc_length = fdesc->report_desc_length;
1094         hidg->report_desc = kmemdup(fdesc->report_desc,
1095                                     fdesc->report_desc_length,
1096                                     GFP_KERNEL);
1097         if (!hidg->report_desc) {
1098                 kfree(hidg);
1099                 return -ENOMEM;
1100         }
1101
1102         hidg->func.name    = "hid";
1103         hidg->func.strings = ct_func_strings;
1104         hidg->func.bind    = hidg_bind;
1105         hidg->func.unbind  = hidg_unbind;
1106         hidg->func.set_alt = hidg_set_alt;
1107         hidg->func.disable = hidg_disable;
1108         hidg->func.setup   = hidg_setup;
1109
1110         status = usb_add_function(c, &hidg->func);
1111         if (status)
1112                 kfree(hidg);
1113         else
1114         g_hidg = hidg;
1115         return status;
1116 }
1117
1118 int ghid_setup(struct usb_gadget *g, int count)
1119 {
1120         int status;
1121         dev_t dev;
1122
1123         hidg_class = class_create(THIS_MODULE, "hidg");
1124
1125         status = alloc_chrdev_region(&dev, 0, count, "hidg");
1126         if (!status) {
1127                 major = MAJOR(dev);
1128                 minors = count;
1129         }
1130
1131         return status;
1132 }
1133
1134 void ghid_cleanup(void)
1135 {
1136         if (major) {
1137                 unregister_chrdev_region(MKDEV(major, 0), minors);
1138                 major = minors = 0;
1139         }
1140
1141         class_destroy(hidg_class);
1142 }