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     struct usb_composite_dev        *u_cdev;
  71
  72         bool connected;
  73         bool  boot_protocol;//4   1 for boot protocol , 0 for report protocol
  74         bool suspend;
  75 };
  76
  77 bool  bypass_input = 0;
  78 static inline struct f_hidg *func_to_hidg(struct usb_function *f)
  79 {
  80         return container_of(f, struct f_hidg, func);
  81 }
  82 void hidg_disconnect();
  83
  84 /*-------------------------------------------------------------------------*/
  85 /*                           Static descriptors                            */
  86
  87 static struct usb_interface_descriptor hidg_interface_desc = {
  88         .bLength                = sizeof hidg_interface_desc,
  89         .bDescriptorType        = USB_DT_INTERFACE,
  90         /* .bInterfaceNumber    = DYNAMIC */
  91         .bAlternateSetting      = 0,
  92         .bNumEndpoints          = 1,
  93         .bInterfaceClass        = USB_CLASS_HID,
  94         /* .bInterfaceSubClass  = DYNAMIC */
  95         /* .bInterfaceProtocol  = DYNAMIC */
  96         /* .iInterface          = DYNAMIC */
  97 };
  98
  99 static struct hid_descriptor hidg_desc = {
 100         .bLength                        = sizeof hidg_desc,
 101         .bDescriptorType                = HID_DT_HID,
 102         .bcdHID                         = 0x0110, //0x0101,
 103         .bCountryCode                   = 0x00,
 104         .bNumDescriptors                = 0x1,
 105         /*.desc[0].bDescriptorType      = DYNAMIC */
 106         /*.desc[0].wDescriptorLenght    = DYNAMIC */
 107 };
 108
 109 /* High-Speed Support */
 110
 111 static struct usb_endpoint_descriptor hidg_hs_in_ep_desc = {
 112         .bLength                = USB_DT_ENDPOINT_SIZE,
 113         .bDescriptorType        = USB_DT_ENDPOINT,
 114         .bEndpointAddress       = USB_DIR_IN,
 115         .bmAttributes           = USB_ENDPOINT_XFER_INT,
 116         .wMaxPacketSize   = cpu_to_le16(64),
 117         .bInterval              = 4, /* FIXME: Add this field in the
 118                                       * HID gadget configuration?
 119                                       * (struct hidg_func_descriptor)
 120                                       */
 121 };
 122
 123 static struct usb_descriptor_header *hidg_hs_descriptors[] = {
 124         (struct usb_descriptor_header *)&hidg_interface_desc,
 125         (struct usb_descriptor_header *)&hidg_desc,
 126         (struct usb_descriptor_header *)&hidg_hs_in_ep_desc,
 127         NULL,
 128 };
 129
 130 /* Full-Speed Support */
 131
 132 static struct usb_endpoint_descriptor hidg_fs_in_ep_desc = {
 133         .bLength                = USB_DT_ENDPOINT_SIZE,
 134         .bDescriptorType        = USB_DT_ENDPOINT,
 135         .bEndpointAddress       = USB_DIR_IN,
 136         .bmAttributes           = USB_ENDPOINT_XFER_INT,
 137         .wMaxPacketSize = cpu_to_le16(64),
 138         .bInterval              = 10, /* FIXME: Add this field in the
 139                                        * HID gadget configuration?
 140                                        * (struct hidg_func_descriptor)
 141                                        */
 142 };
 143
 144 static struct usb_descriptor_header *hidg_fs_descriptors[] = {
 145         (struct usb_descriptor_header *)&hidg_interface_desc,
 146         (struct usb_descriptor_header *)&hidg_desc,
 147         (struct usb_descriptor_header *)&hidg_fs_in_ep_desc,
 148         NULL,
 149 };
 150
 151 /* hid descriptor for a keyboard */
 152 const struct hidg_func_descriptor my_hid_data = {
 153         .subclass               = 1, /* No subclass */
 154         .protocol               = 1, /* 1-Keyboard,2-mouse */
 155         .report_length          = 64,
 156         .report_desc_length = 150,
 157         .report_desc        = {
 158
 159         0x05, 0x01, /*       USAGE_PAGE (Generic Desktop)         */
 160         0x09, 0x06, /*       USAGE (Keyboard)                     */
 161         0xA1, 0x01, /*       COLLECTION (Application)             */
 162             0x85, 0x01, /*   REPORT ID (0x01)                     */
 163             0x05, 0x07, /*   USAGE_PAGE (Keyboard)                */
 164             0x19, 0xE0, /*   USAGE_MINIMUM (Keyboard LeftControl) */
 165             0x29, 0xE7, /*   USAGE_MAXIMUM (Keyboard Right GUI)   */
 166             0x15, 0x00, /*   LOGICAL_MINIMUM (0)                  */
 167             0x25, 0x01, /*   LOGICAL_MAXIMUM (1)                  */
 168             0x75, 0x01, /*   REPORT_SIZE (1)                      */
 169             0x95, 0x08, /*   REPORT_COUNT (8)                     */
 170             0x81, 0x02, /*   INPUT (Data,Var,Abs)                 */
 171             0x95, 0x01, /*   REPORT_COUNT (1)                     */
 172             0x75, 0x08, /*   REPORT_SIZE (8)                      */
 173             0x81, 0x03, /*   INPUT (Cnst,Var,Abs)                 */
 174             0x95, 0x05, /*   REPORT_COUNT (5)                     */
 175             0x75, 0x01, /*   REPORT_SIZE (1)                      */
 176             0x05, 0x08, /*   USAGE_PAGE (LEDs)                    */
 177             0x19, 0x01, /*   USAGE_MINIMUM (Num Lock)             */
 178             0x29, 0x05, /*   USAGE_MAXIMUM (Kana)                 */
 179             0x91, 0x02, /*   OUTPUT (Data,Var,Abs)                */
 180             0x95, 0x01, /*   REPORT_COUNT (1)                     */
 181             0x75, 0x03, /*   REPORT_SIZE (3)                      */
 182             0x91, 0x03, /*   OUTPUT (Cnst,Var,Abs)                */
 183             0x95, 0x06, /*   REPORT_COUNT (6)                     */
 184             0x75, 0x08, /*   REPORT_SIZE (8)                      */
 185             0x15, 0x00, /*   LOGICAL_MINIMUM (0)                  */
 186             0x25, 0x65, /*   LOGICAL_MAXIMUM (101)                */
 187             0x05, 0x07, /*   USAGE_PAGE (Keyboard)                */
 188             0x19, 0x00, /*   USAGE_MINIMUM (Reserved)             */
 189             0x29, 0x65, /*   USAGE_MAXIMUM (Keyboard Application) */
 190             0x81, 0x00, /*   INPUT (Data,Ary,Abs)                 */
 191         0xC0,           /*   END_COLLECTION                       */
 192
 193         0x05, 0x0C,     /*   USAGE_PAGE (consumer page)           */
 194         0x09, 0x01,     /*   USAGE (consumer control)             */
 195         0xA1, 0x01,     /*   COLLECTION (Application)             */
 196             0x85, 0x03, /*   REPORT ID (0x03)                     */
 197             0x15, 0x00, /*   LOGICAL_MINIMUM (0)                  */
 198             0x26, 0xFF, 0x02, /*  LOGICAL_MAXIMUM (0x2FF)         */
 199             0x19, 0x00, /*   USAGE_MINIMUM (00)                   */
 200             0x2A, 0xFF, 0x02, /*  USAGE_MAXIMUM (0x2FF)           */
 201             0x75, 0x10, /*   REPORT_SIZE (16)                     */
 202             0x95, 0x01, /*   REPORT_COUNT (1)                     */
 203             0x81, 0x00, /*   INPUT (Data,Ary,Abs)                 */
 204         0xC0,
 205
 206         0x05, 0x01,     /*   USAGE_PAGE (Generic Desktop)         */
 207         0x09, 0x02,     /*   USAGE (Mouse)                        */
 208         0xA1, 0x01,     /*   COLLECTION (Application)             */
 209             0x85, 0x02,     /*   REPORT ID (0x02)                 */
 210             0x09, 0x01,     /*   USAGE (Pointer)                  */
 211
 212             0xA1, 0x00,     /*   COLLECTION (Application)         */
 213             0x05, 0x09,     /*   USAGE_PAGE (Button)              */
 214             0x19, 0x01,     /*   USAGE_MINIMUM (Button 1)         */
 215             0x29, 0x08,     /*   USAGE_MAXIMUM (Button 8)         */
 216             0x15, 0x00,     /*   LOGICAL_MINIMUM (0)              */
 217             0x25, 0x01,     /*   LOGICAL_MAXIMUM (1)              */
 218             0x75, 0x01,     /*   REPORT_SIZE (1)                  */
 219             0x95, 0x08,     /*   REPORT_COUNT (8)                 */
 220             0x81, 0x02,     /*   INPUT (Data,Var,Abs)             */
 221             0x05, 0x01,     /*   USAGE_PAGE (Generic Desktop)     */
 222             0x09, 0x30,     /*   USAGE (X)                        */
 223             0x09, 0x31,     /*   USAGE (Y)                        */
 224             0x16, 0x01, 0xF8, /* LOGICAL_MINIMUM (-2047)          */
 225             0x26, 0xFF, 0x07, /* LOGICAL_MAXIMUM (2047)           */
 226             0x75, 0x0C,     /*   REPORT_SIZE (12)                 */
 227             0x95, 0x02,     /*   REPORT_COUNT (2)                 */
 228             0x81, 0x06,     /*   INPUT (Data,Var,Rel)             */
 229             0x09, 0x38,
 230             0x15, 0x81,     /*   LOGICAL_MINIMUM (-127)           */
 231             0x25, 0x7F,     /*   LOGICAL_MAXIMUM (127)            */
 232             0x75, 0x08,     /*   REPORT_SIZE (8)                  */
 233             0x95, 0x01,     /*   REPORT_COUNT (1)                 */
 234             0x81, 0x06,     /*   INPUT (Data,Var,Rel)             */
 235             0xC0 ,          /*   END_COLLECTION                   */
 236
 237         0xC0            /*   END_COLLECTION                       */
 238
 239         },
 240 };
 241
 242 struct f_hidg *g_hidg;
 243
 244 /*-------------------------------------------------------------------------*/
 245 /*                              Char Device                                */
 246
 247 static ssize_t f_hidg_read(struct file *file, char __user *buffer,
 248                         size_t count, loff_t *ptr)
 249 {
 250         struct f_hidg   *hidg     = file->private_data;
 251         char            *tmp_buff = NULL;
 252         unsigned long   flags;
 253
 254         if (!count)
 255                 return 0;
 256
 257         if (!access_ok(VERIFY_WRITE, buffer, count))
 258                 return -EFAULT;
 259
 260         spin_lock_irqsave(&hidg->spinlock, flags);
 261
 262 #define READ_COND (hidg->set_report_buff != NULL)
 263
 264         while (!READ_COND) {
 265                 spin_unlock_irqrestore(&hidg->spinlock, flags);
 266                 if (file->f_flags & O_NONBLOCK)
 267                         return -EAGAIN;
 268
 269                 if (wait_event_interruptible(hidg->read_queue, READ_COND))
 270                         return -ERESTARTSYS;
 271
 272                 spin_lock_irqsave(&hidg->spinlock, flags);
 273         }
 274
 275
 276         count = min_t(unsigned, count, hidg->set_report_length);
 277         tmp_buff = hidg->set_report_buff;
 278         hidg->set_report_buff = NULL;
 279
 280         spin_unlock_irqrestore(&hidg->spinlock, flags);
 281
 282         if (tmp_buff != NULL) {
 283                 /* copy to user outside spinlock */
 284                 count -= copy_to_user(buffer, tmp_buff, count);
 285                 kfree(tmp_buff);
 286         } else
 287                 count = -ENOMEM;
 288
 289         return count;
 290 }
 291
 292 static void f_hidg_req_complete(struct usb_ep *ep, struct usb_request *req)
 293 {
 294         struct f_hidg *hidg = (struct f_hidg *)ep->driver_data;
 295
 296         if (req->status != 0) {
 297         ;
 298         }
 299
 300         wake_up(&hidg->write_queue);
 301 }
 302
 303 #define WRITE_COND (!hidg->write_pending)
 304 static ssize_t f_hidg_write(struct file *file, const char __user *buffer,
 305                             size_t count, loff_t *offp)
 306 {
 307 #if 0
 308         struct f_hidg *hidg  = file->private_data;
 309         ssize_t status = -ENOMEM;
 310
 311         if (!access_ok(VERIFY_READ, buffer, count))
 312                 return -EFAULT;
 313
 314         mutex_lock(&hidg->lock);
 315
 316 #define WRITE_COND (!hidg->write_pending)
 317
 318         /* write queue */
 319         while (!WRITE_COND) {
 320                 mutex_unlock(&hidg->lock);
 321                 if (file->f_flags & O_NONBLOCK)
 322                         return -EAGAIN;
 323
 324                 if (wait_event_interruptible_exclusive(
 325                                 hidg->write_queue, WRITE_COND))
 326                         return -ERESTARTSYS;
 327
 328                 mutex_lock(&hidg->lock);
 329         }
 330
 331         count  = min_t(unsigned, count, hidg->report_length);
 332         status = copy_from_user(hidg->req->buf, buffer, count);
 333
 334         if (status != 0) {
 335                 //ERROR(hidg->func.config->cdev,
 336                 //      "copy_from_user error\n");
 337                 mutex_unlock(&hidg->lock);
 338                 return -EINVAL;
 339         }
 340
 341         hidg->req->status   = 0;
 342         hidg->req->zero     = 0;
 343         hidg->req->length   = count;
 344         hidg->req->complete = f_hidg_req_complete;
 345         hidg->req->context  = hidg;
 346         hidg->write_pending = 1;
 347
 348         status = usb_ep_queue(hidg->in_ep, hidg->req, GFP_ATOMIC);
 349         if (status < 0) {
 350                 //ERROR(hidg->func.config->cdev,
 351                 //      "usb_ep_queue error on int endpoint %zd\n", status);
 352                 hidg->write_pending = 0;
 353                 wake_up(&hidg->write_queue);
 354         } else {
 355                 status = count;
 356         }
 357
 358         mutex_unlock(&hidg->lock);
 359 #endif
 360         return count;
 361 }
 362
 363
 364 static void f_hid_queue_report(u8 *data, int len)
 365 {
 366     //this function will run in interrupt context
 367     ssize_t status = -ENOMEM;
 368     struct f_hidg *hidg = g_hidg;
 369     //static char raw_report[8];
 370
 371     if(hidg){
 372         if(hidg->connected){
 373             //mutex_lock(&hidg->lock);
 374             memcpy(hidg->req->buf, data, len);
 375                 hidg->req->status   = 0;
 376                 hidg->req->zero     = 0;
 377                 hidg->req->length   = len;
 378                 //hidg->req->buf      = raw_report;
 379                 hidg->req->complete = f_hidg_req_complete;
 380                 hidg->req->context  = hidg;
 381
 382             status = usb_ep_queue(hidg->in_ep, hidg->req, GFP_ATOMIC);
 383             if (status < 0) {
 384                 //printk("usb_ep_queue error on int endpoint %zd\n", status);
 385                 }
 386             }
 387     //mutex_unlock(&hidg->lock);
 388     }
 389 }
 390
 391
 392 #define KBD_REPORT_ID (0x01)
 393 #define MOUSE_REPORT_ID (0x02)
 394 #define CONSUMER_REPORT_ID (0x03)
 395
 396 unsigned int f_hid_bypass_input_get()
 397 {
 398     if(!g_hidg)
 399         return 0;
 400     else
 401         return bypass_input;
 402 }
 403 EXPORT_SYMBOL(f_hid_bypass_input_get);
 404
 405 unsigned char kbd_idle[]     = {KBD_REPORT_ID,0,0,0,0,0,0,0,0};
 406 unsigned char mouse_idle[]   = {MOUSE_REPORT_ID,0,0,0,0,0};
 407 unsigned char consumer_idle[]= {CONSUMER_REPORT_ID,0,0};
 408
 409 static void f_hid_send_idle_report(void)
 410 {
 411     if(g_hidg){
 412         mdelay(2);
 413         f_hid_queue_report(kbd_idle, sizeof(kbd_idle));
 414         mdelay(2);
 415         f_hid_queue_report(mouse_idle, sizeof(mouse_idle));
 416         mdelay(2);
 417         f_hid_queue_report(consumer_idle, sizeof(consumer_idle));
 418     }
 419 }
 420
 421 static void f_hid_bypass_input_set(u8 bypass)
 422 {
 423     if(g_hidg){
 424
 425         u8 current_state = f_hid_bypass_input_get();
 426
 427         if( bypass && (!current_state))
 428         {
 429             bypass_input = 1;
 430         }
 431         if(!bypass && (current_state))
 432         {
 433             f_hid_send_idle_report();
 434             bypass_input = 0;
 435         }
 436     }
 437 }
 438
 439 void f_hid_wakeup()
 440 {
 441     g_hidg->u_cdev->gadget->ops->wakeup(g_hidg->u_cdev->gadget);
 442 }
 443
 444 struct kbd_report {
 445     u8        id;
 446     u8        command;
 447     u8        reserved;
 448     u8        key_array[6];
 449 }__attribute__ ((packed));
 450
 451 struct consumer_report {
 452     u8        id;
 453     u16        data;
 454 }__attribute__ ((packed));
 455
 456 void f_hid_kbd_translate_report(struct hid_report *report, u8 *data)
 457 {
 458     if(f_hid_bypass_input_get())
 459     {
 460         int i,j;
 461         struct kbd_report  k = {0};
 462         struct consumer_report c = {0};
 463
 464         struct hid_field *field;
 465
 466         k.id = KBD_REPORT_ID;//report id
 467         for (i = 0; i < report->maxfield; i++){
 468             field = report->field[i];
 469             if(HID_MAIN_ITEM_VARIABLE & field->flags)//VARIABLE REPORT
 470             {
 471                 for(j = 0; j < field->report_count; j++)
 472                 {
 473                     if((field->usage[j].type == EV_KEY) && (field->usage[j].code == KEY_LEFTCTRL))
 474                         k.command |= field->value[j] ? 1 << 0 : 0 ;
 475                     if((field->usage[j].type == EV_KEY) && (field->usage[j].code == KEY_LEFTSHIFT))
 476                         k.command |= field->value[j] ? 1 << 1 : 0 ;
 477                     if((field->usage[j].type == EV_KEY) && (field->usage[j].code == KEY_LEFTALT))
 478                         k.command |= field->value[j] ? 1 << 2 : 0 ;
 479                     if((field->usage[j].type == EV_KEY) && (field->usage[j].code == KEY_LEFTMETA))
 480                         k.command |= field->value[j] ? 1 << 3 : 0 ;
 481                     if((field->usage[j].type == EV_KEY) && (field->usage[j].code == KEY_RIGHTCTRL))
 482                         k.command |= field->value[j] ? 1 << 4 : 0 ;
 483                     if((field->usage[j].type == EV_KEY) && (field->usage[j].code == KEY_RIGHTSHIFT))
 484                         k.command |= field->value[j] ? 1 << 5 : 0 ;
 485                     if((field->usage[j].type == EV_KEY) && (field->usage[j].code == KEY_RIGHTALT))
 486                         k.command |= field->value[j] ? 1 << 6 : 0 ;
 487                     if((field->usage[j].type == EV_KEY) && (field->usage[j].code == KEY_RIGHTMETA))
 488                         k.command |= field->value[j] ? 1 << 7 : 0 ;
 489                 }
 490             }
 491             else // ARRAY REPORT
 492             {
 493                 if(field->application == HID_GD_KEYBOARD)
 494                 {
 495                     for(j = 0 ; j<(min(6,field->report_count)); j++)
 496                     {
 497                         k.key_array[j] = field->value[j];
 498                     }
 499                 }
 500                 if(field->application == 0x000c0001)//CONSUMER PAGE
 501                 {
 502                     for(j = 0 ; j < (field->report_count); j++)
 503                     {
 504                         c.id = CONSUMER_REPORT_ID;
 505                         c.data = field->value[j];
 506                         f_hid_queue_report((u8 *)&c, sizeof(c));
 507                         return;
 508                     }
 509                 }
 510             }
 511         }
 512         if(g_hidg->boot_protocol)
 513             f_hid_queue_report((u8 *)&k+1, sizeof(k)-1);
 514         else
 515         {
 516             f_hid_wakeup();
 517             f_hid_queue_report((u8 *)&k, sizeof(k));
 518         }
 519     }
 520 }
 521 EXPORT_SYMBOL(f_hid_kbd_translate_report);
 522
 523 struct mouse_report {
 524     u8        id:8;
 525     bool      button_left:1;
 526     bool      button_right:1;
 527     bool      button_middle:1;
 528     bool      button_side:1;
 529     bool      button_extra:1;
 530     bool      button_forward:1;
 531     bool      button_back:1;
 532     bool      button_task:1;
 533
 534     signed    x :12;
 535     signed    y :12;
 536     s8        wheel:8;
 537 }__attribute__ ((packed));
 538
 539
 540 void f_hid_mouse_translate_report(struct hid_report *report, u8 *data)
 541 {
 542
 543     if(f_hid_bypass_input_get() && !g_hidg->boot_protocol)
 544     {
 545         struct mouse_report m = {0};
 546         struct hid_field *field;
 547
 548         int i,j;
 549         m.id     = MOUSE_REPORT_ID;
 550         for (i = 0; i < report->maxfield; i++){
 551             field = report->field[i];
 552             for(j=0; j<field->report_count; j++)
 553             {
 554                 if((field->usage[j].type == EV_KEY) && (field->usage[j].code == BTN_LEFT))
 555                     if(field->value[j])
 556                         m.button_left= 1;
 557                 if((field->usage[j].type == EV_KEY) && (field->usage[j].code == BTN_RIGHT))
 558                     if(field->value[j])
 559                         m.button_right= 1;
 560                 if((field->usage[j].type == EV_KEY) && (field->usage[j].code == BTN_MIDDLE))
 561                     if(field->value[j])
 562                         m.button_middle= 1;
 563                 if((field->usage[j].type == EV_KEY) && (field->usage[j].code == BTN_SIDE))
 564                     if(field->value[j])
 565                         m.button_side= 1;
 566                 if((field->usage[j].type == EV_KEY) && (field->usage[j].code == BTN_EXTRA))
 567                     if(field->value[j])
 568                         m.button_extra= 1;
 569                 if((field->usage[j].type == EV_KEY) && (field->usage[j].code == BTN_FORWARD))
 570                     if(field->value[j])
 571                         m.button_forward= 1;
 572                 if((field->usage[j].type == EV_KEY) && (field->usage[j].code == BTN_BACK))
 573                     if(field->value[j])
 574                         m.button_back= 1;
 575                 if((field->usage[j].type == EV_KEY) && (field->usage[j].code == BTN_TASK))
 576                     if(field->value[j])
 577                         m.button_task= 1;
 578
 579
 580                 if((field->usage[j].type == EV_REL) && (field->usage[j].code == REL_X))
 581                     m.x = field->value[j];
 582                 if((field->usage[j].type == EV_REL) && (field->usage[j].code == REL_Y))
 583                     m.y = field->value[j];
 584                 if((field->usage[j].type == EV_REL) && (field->usage[j].code == REL_WHEEL))
 585                     m.wheel= field->value[j];
 586             }
 587         }
 588         if(m.button_right || m.button_left)
 589             f_hid_wakeup();
 590         f_hid_queue_report((u8 *)&m, sizeof(m));
 591     }
 592 }
 593 EXPORT_SYMBOL(f_hid_mouse_translate_report);
 594
 595 #undef KBD_REPORT_ID
 596 #undef MOUSE_REPORT_ID
 597 #undef CONSUMER_REPORT_ID
 598
 599
 600 static unsigned int f_hidg_poll(struct file *file, poll_table *wait)
 601 {
 602         return 0;
 603 }
 604
 605 #undef WRITE_COND
 606 #undef READ_COND
 607
 608 static int f_hidg_release(struct inode *inode, struct file *fd)
 609 {
 610         fd->private_data = NULL;
 611         return 0;
 612 }
 613
 614 static int f_hidg_open(struct inode *inode, struct file *fd)
 615 {
 616         struct f_hidg *hidg =
 617                 container_of(inode->i_cdev, struct f_hidg, cdev);
 618
 619         fd->private_data = hidg;
 620
 621         return 0;
 622 }
 623
 624 /*-------------------------------------------------------------------------*/
 625 /*                                usb_function                             */
 626
 627 void hidg_connect()
 628 {
 629     if(g_hidg)
 630         g_hidg->connected = 1;
 631 }
 632
 633 void hidg_disconnect()
 634 {
 635     if(g_hidg){
 636         g_hidg->connected = 0;
 637     }
 638 }
 639 EXPORT_SYMBOL(hidg_disconnect);
 640 int hidg_start(struct usb_composite_dev *cdev);
 641
 642 static void hidg_set_report_complete(struct usb_ep *ep, struct usb_request *req)
 643 {
 644         struct f_hidg *hidg = (struct f_hidg *)req->context;
 645     printk("hidg_set_report_complete ,req->status = %d len = %d\n",
 646     req->status,req->actual);
 647         if (req->status != 0 || req->buf == NULL || req->actual == 0) {
 648                 return;
 649         }
 650
 651         spin_lock(&hidg->spinlock);
 652
 653     if(!hidg->connected)
 654         hidg_connect();
 655
 656         hidg->set_report_buff = krealloc(hidg->set_report_buff,
 657                                          req->actual, GFP_ATOMIC);
 658
 659         if (hidg->set_report_buff == NULL) {
 660                 spin_unlock(&hidg->spinlock);
 661                 return;
 662         }
 663         hidg->set_report_length = req->actual;
 664         memcpy(hidg->set_report_buff, req->buf, req->actual);
 665
 666         spin_unlock(&hidg->spinlock);
 667
 668         wake_up(&hidg->read_queue);
 669 }
 670
 671 static int hidg_setup(struct usb_function *f,
 672                 const struct usb_ctrlrequest *ctrl)
 673 {
 674         struct f_hidg                   *hidg = func_to_hidg(f);
 675         struct usb_composite_dev        *cdev = f->config->cdev;
 676         struct usb_request              *req  = cdev->req;
 677         int status = 0;
 678         __u16 value, length;
 679
 680         value   = __le16_to_cpu(ctrl->wValue);
 681         length  = __le16_to_cpu(ctrl->wLength);
 682
 683         VDBG(cdev, "hid_setup crtl_request : bRequestType:0x%x bRequest:0x%x "
 684                 "Value:0x%x\n", ctrl->bRequestType, ctrl->bRequest, value);
 685
 686         switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
 687         case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 688                   | HID_REQ_GET_REPORT):
 689                 VDBG(cdev, "get_report\n");
 690
 691                 /* send an empty report */
 692                 length = min_t(unsigned, length, hidg->report_length);
 693                 memset(req->buf, 0x0, length);
 694
 695                 goto respond;
 696                 break;
 697
 698         case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 699                   | HID_REQ_GET_PROTOCOL):
 700                 VDBG(cdev, "get_protocol\n");
 701                 goto stall;
 702                 break;
 703
 704         case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 705                   | HID_REQ_SET_REPORT):
 706                 VDBG(cdev, "set_report | wLenght=%d\n", ctrl->wLength);
 707                 req->context  = hidg;
 708                 req->complete = hidg_set_report_complete;
 709                 goto respond;
 710                 break;
 711
 712         case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 713                   | HID_REQ_SET_PROTOCOL):
 714                 VDBG(cdev, "set_protocol\n");
 715                 goto stall;
 716                 break;
 717
 718         case ((USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_INTERFACE) << 8
 719                   | USB_REQ_GET_DESCRIPTOR):
 720                 switch (value >> 8) {
 721                 case HID_DT_REPORT:
 722                         VDBG(cdev, "USB_REQ_GET_DESCRIPTOR: REPORT\n");
 723                         length = min_t(unsigned short, length,
 724                                                    hidg->report_desc_length);
 725                         memcpy(req->buf, hidg->report_desc, length);
 726                         goto respond;
 727                         break;
 728
 729                 default:
 730                         VDBG(cdev, "Unknown decriptor request 0x%x\n",
 731                                  value >> 8);
 732                         goto stall;
 733                         break;
 734                 }
 735                 break;
 736
 737         default:
 738                 VDBG(cdev, "Unknown request 0x%x\n",
 739                          ctrl->bRequest);
 740                 goto stall;
 741                 break;
 742         }
 743
 744 stall:
 745         return -EOPNOTSUPP;
 746
 747 respond:
 748         req->zero = 0;
 749         req->length = length;
 750         status = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
 751         if (status < 0)
 752                 ;//ERROR(cdev, "usb_ep_queue error on ep0 %d\n", value);
 753         return status;
 754 }
 755
 756 static int hidg_ctrlrequest(struct usb_composite_dev *cdev,
 757                 const struct usb_ctrlrequest *ctrl)
 758 {
 759         struct f_hidg                   *hidg = g_hidg;
 760         struct usb_request              *req  = cdev->req;
 761         int status = 0;
 762         __u16 value, length;
 763
 764         value   = __le16_to_cpu(ctrl->wValue);
 765         length  = __le16_to_cpu(ctrl->wLength);
 766
 767     /*
 768         printk("hid_setup crtl_request : bRequestType:0x%x bRequest:0x%x "
 769                 "Value:0x%x\n", ctrl->bRequestType, ctrl->bRequest, value);
 770     */
 771         switch ((ctrl->bRequestType << 8) | ctrl->bRequest) {
 772         case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 773                   | HID_REQ_GET_REPORT):
 774                 VDBG(cdev, "get_report\n");
 775         return -EOPNOTSUPP;//this command bypass to rndis
 776                 /* send an empty report */
 777                 length = min_t(unsigned, length, hidg->report_length);
 778                 memset(req->buf, 0x0, length);
 779                 goto respond;
 780                 break;
 781
 782         case ((USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 783                   | HID_REQ_GET_PROTOCOL):
 784                 VDBG(cdev, "get_protocol\n");
 785                 goto stall;
 786                 break;
 787
 788         case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 789                   | HID_REQ_SET_REPORT):
 790                 VDBG(cdev, "set_report | wLenght=%d\n", ctrl->wLength);
 791                 req->context  = hidg;
 792                 req->complete = hidg_set_report_complete;
 793                 goto respond;
 794                 break;
 795
 796     case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 797           | HID_REQ_SET_IDLE):
 798         VDBG(cdev, "set_report | wLenght=%d\n", ctrl->wLength);
 799         req->context  = hidg;
 800         req->complete = hidg_set_report_complete;
 801         goto respond;
 802         break;
 803
 804         case ((USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE) << 8
 805                   | HID_REQ_SET_PROTOCOL):
 806                 VDBG(cdev, "set_protocol\n");
 807                 req->context  = hidg;
 808                 req->complete = hidg_set_report_complete;
 809                 hidg->boot_protocol = 1;
 810                 hidg_start(cdev);
 811                 goto respond;
 812                 break;
 813
 814         case ((USB_DIR_IN | USB_TYPE_STANDARD | USB_RECIP_INTERFACE) << 8
 815                   | USB_REQ_GET_DESCRIPTOR):
 816                 switch (value >> 8) {
 817                 case HID_DT_REPORT:
 818                         VDBG(cdev, "USB_REQ_GET_DESCRIPTOR: REPORT\n");
 819                         length = min_t(unsigned short, length,
 820                                                    hidg->report_desc_length);
 821                         memcpy(req->buf, hidg->report_desc, length);
 822                         hidg->boot_protocol = 0;
 823                         goto respond;
 824                         break;
 825
 826                 default:
 827                         VDBG(cdev, "Unknown decriptor request 0x%x\n",
 828                                  value >> 8);
 829                         goto stall;
 830                         break;
 831                 }
 832                 break;
 833
 834         default:
 835                 VDBG(cdev, "Unknown request 0x%x\n",
 836                          ctrl->bRequest);
 837                 goto stall;
 838                 break;
 839         }
 840
 841 stall:
 842         return -EOPNOTSUPP;
 843
 844 respond:
 845         req->zero = 0;
 846         req->length = length;
 847         status = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC);
 848         if (status < 0)
 849                 ;//ERROR(cdev, "usb_ep_queue error on ep0 %d\n", value);
 850         return status;
 851 }
 852
 853 static void hidg_disable(struct usb_function *f)
 854 {
 855         struct f_hidg *hidg = func_to_hidg(f);
 856
 857         usb_ep_disable(hidg->in_ep);
 858         hidg->in_ep->driver_data = NULL;
 859 }
 860
 861 static int hidg_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 862 {
 863         struct usb_composite_dev                *cdev = f->config->cdev;
 864         struct f_hidg                           *hidg = func_to_hidg(f);
 865         const struct usb_endpoint_descriptor    *ep_desc;
 866         int status = 0;
 867         VDBG(cdev, "hidg_set_alt intf:%d alt:%d\n", intf, alt);
 868
 869     printk("^^^^^hidg_set_alt\n");
 870
 871         if (hidg->in_ep != NULL) {
 872                 /* restart endpoint */
 873                 if (hidg->in_ep->driver_data != NULL)
 874                         usb_ep_disable(hidg->in_ep);
 875
 876                 ep_desc = ep_choose(f->config->cdev->gadget,
 877                                 hidg->hs_in_ep_desc, hidg->fs_in_ep_desc);
 878                 status = usb_ep_enable(hidg->in_ep, ep_desc);
 879                 if (status < 0) {
 880                         //ERROR(cdev, "Enable endpoint FAILED!\n");
 881                         goto fail;
 882                 }
 883                 hidg->in_ep->driver_data = hidg;
 884         }
 885 fail:
 886         return status;
 887 }
 888
 889 int hidg_start(struct usb_composite_dev *cdev)
 890 {
 891     printk("^^^^^hidg_start\n");
 892         struct f_hidg                           *hidg = g_hidg;
 893         const struct usb_endpoint_descriptor    *ep_desc;
 894         int status = 0;
 895
 896         if (hidg->in_ep != NULL) {
 897                 /* restart endpoint */
 898                 if (hidg->in_ep->driver_data != NULL)
 899                         usb_ep_disable(hidg->in_ep);
 900
 901                 ep_desc = ep_choose(cdev->gadget,
 902                                 hidg->hs_in_ep_desc, hidg->fs_in_ep_desc);
 903                 status = usb_ep_enable(hidg->in_ep, ep_desc);
 904                 if (status < 0) {
 905                         printk("Enable endpoint FAILED!\n");
 906                         goto fail;
 907                 }
 908                 hidg->in_ep->driver_data = hidg;
 909         }
 910 fail:
 911         return status;
 912 }
 913
 914
 915 const struct file_operations f_hidg_fops = {
 916         .owner          = THIS_MODULE,
 917         .open           = f_hidg_open,
 918         .release        = f_hidg_release,
 919         .write          = NULL,//f_hidg_write,disable write to /dev/hidg0
 920         .read           = f_hidg_read,
 921         .poll           = NULL,//f_hidg_poll,
 922         .llseek         = noop_llseek,
 923 };
 924
 925 static int hidg_bind(struct usb_configuration *c, struct usb_function *f)
 926 {
 927
 928         struct usb_ep           *ep_in;
 929         struct f_hidg           *hidg = func_to_hidg(f);
 930         int                     status;
 931         dev_t                   dev;
 932         /* allocate instance-specific interface IDs, and patch descriptors */
 933         status = usb_interface_id(c, f);
 934         if (status < 0)
 935                 goto fail;
 936         hidg_interface_desc.bInterfaceNumber = status;
 937
 938         /* allocate instance-specific endpoints */
 939         status = -ENODEV;
 940         ep_in = usb_ep_autoconfig(c->cdev->gadget, &hidg_fs_in_ep_desc);
 941         if (!ep_in)
 942                 goto fail;
 943         ep_in->driver_data = c->cdev;   /* claim */
 944         hidg->in_ep = ep_in;
 945
 946         /* preallocate request and buffer */
 947         status = -ENOMEM;
 948         hidg->req = usb_ep_alloc_request(hidg->in_ep, GFP_KERNEL);
 949         if (!hidg->req)
 950                 goto fail;
 951
 952
 953         hidg->req->buf = kmalloc(hidg->report_length, GFP_KERNEL);
 954         if (!hidg->req->buf)
 955                 goto fail;
 956
 957         /* set descriptor dynamic values */
 958         hidg_interface_desc.bInterfaceSubClass = hidg->bInterfaceSubClass;
 959         hidg_interface_desc.bInterfaceProtocol = hidg->bInterfaceProtocol;
 960 //      hidg_hs_in_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
 961 //      hidg_fs_in_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
 962 //    hidg_hs_out_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
 963 //      hidg_fs_out_ep_desc.wMaxPacketSize = cpu_to_le16(hidg->report_length);
 964         hidg_desc.desc[0].bDescriptorType = HID_DT_REPORT;
 965         hidg_desc.desc[0].wDescriptorLength =
 966                 cpu_to_le16(hidg->report_desc_length);
 967
 968         hidg->set_report_buff = NULL;
 969
 970         /* copy descriptors */
 971         f->descriptors = usb_copy_descriptors(hidg_fs_descriptors);
 972         if (!f->descriptors)
 973                 goto fail;
 974
 975         hidg->fs_in_ep_desc = usb_find_endpoint(hidg_fs_descriptors,
 976                                                 f->descriptors,
 977                                                 &hidg_fs_in_ep_desc);
 978
 979         if (gadget_is_dualspeed(c->cdev->gadget)) {
 980                 hidg_hs_in_ep_desc.bEndpointAddress =
 981                         hidg_fs_in_ep_desc.bEndpointAddress;
 982                 f->hs_descriptors = usb_copy_descriptors(hidg_hs_descriptors);
 983                 if (!f->hs_descriptors)
 984                         goto fail;
 985                 hidg->hs_in_ep_desc = usb_find_endpoint(hidg_hs_descriptors,
 986                                                         f->hs_descriptors,
 987                                                         &hidg_hs_in_ep_desc);
 988         } else {
 989                 hidg->hs_in_ep_desc = NULL;
 990         }
 991
 992     hidg->connected = 0;
 993
 994         mutex_init(&hidg->lock);
 995         spin_lock_init(&hidg->spinlock);
 996         init_waitqueue_head(&hidg->write_queue);
 997         init_waitqueue_head(&hidg->read_queue);
 998
 999         /* create char device */
1000         cdev_init(&hidg->cdev, &f_hidg_fops);
1001         dev = MKDEV(major, hidg->minor);
1002         status = cdev_add(&hidg->cdev, dev, 1);
1003         if (status)
1004                 goto fail;
1005
1006         device_create(hidg_class, NULL, dev, NULL, "%s%d", "hidg", hidg->minor);
1007
1008         return 0;
1009
1010 fail:
1011         ;//ERROR(f->config->cdev, "hidg_bind FAILED\n");
1012         if (hidg->req != NULL) {
1013                 kfree(hidg->req->buf);
1014                 if (hidg->in_ep != NULL)
1015                         usb_ep_free_request(hidg->in_ep, hidg->req);
1016         }
1017     g_hidg = NULL;
1018         usb_free_descriptors(f->hs_descriptors);
1019         usb_free_descriptors(f->descriptors);
1020
1021         return status;
1022 }
1023
1024 static void hidg_unbind(struct usb_configuration *c, struct usb_function *f)
1025 {
1026         struct f_hidg *hidg = func_to_hidg(f);
1027     hidg_disconnect();
1028
1029         device_destroy(hidg_class, MKDEV(major, hidg->minor));
1030         cdev_del(&hidg->cdev);
1031
1032         /* disable/free request and end point */
1033         usb_ep_disable(hidg->in_ep);
1034         usb_ep_dequeue(hidg->in_ep, hidg->req);
1035         if(hidg->req->buf)
1036         kfree(hidg->req->buf);
1037         usb_ep_free_request(hidg->in_ep, hidg->req);
1038
1039         /* free descriptors copies */
1040         usb_free_descriptors(f->hs_descriptors);
1041         usb_free_descriptors(f->descriptors);
1042
1043
1044         kfree(hidg->report_desc);
1045         kfree(hidg->set_report_buff);
1046         kfree(hidg);
1047
1048         g_hidg = NULL;
1049 }
1050
1051 /*-------------------------------------------------------------------------*/
1052 /*                                 Strings                                 */
1053
1054 #define CT_FUNC_HID_IDX 0
1055
1056 static struct usb_string ct_func_string_defs[] = {
1057         [CT_FUNC_HID_IDX].s     = "HID Interface",
1058         {},                     /* end of list */
1059 };
1060
1061 static struct usb_gadget_strings ct_func_string_table = {
1062         .language       = 0x0409,       /* en-US */
1063         .strings        = ct_func_string_defs,
1064 };
1065
1066 static struct usb_gadget_strings *ct_func_strings[] = {
1067         &ct_func_string_table,
1068         NULL,
1069 };
1070
1071 /*-------------------------------------------------------------------------*/
1072 /*                             usb_configuration                           */
1073
1074 int hidg_bind_config(struct usb_configuration *c,
1075                             const struct hidg_func_descriptor *fdesc, int index)
1076 {
1077         struct f_hidg *hidg;
1078         int status;
1079         if (index >= minors)
1080                 return -ENOENT;
1081
1082         /* maybe allocate device-global string IDs, and patch descriptors */
1083         if (ct_func_string_defs[CT_FUNC_HID_IDX].id == 0) {
1084                 status = usb_string_id(c->cdev);
1085                 if (status < 0)
1086                         return status;
1087                 ct_func_string_defs[CT_FUNC_HID_IDX].id = status;
1088                 hidg_interface_desc.iInterface = status;
1089         }
1090
1091         /* allocate and initialize one new instance */
1092         hidg = kzalloc(sizeof *hidg, GFP_KERNEL);
1093         if (!hidg)
1094                 return -ENOMEM;
1095         g_hidg = hidg;
1096         hidg->boot_protocol = 1;
1097         hidg->connected = 0;
1098         hidg->minor = index;
1099         hidg->bInterfaceSubClass = fdesc->subclass;
1100         hidg->bInterfaceProtocol = fdesc->protocol;
1101         hidg->report_length = fdesc->report_length;
1102         hidg->report_desc_length = fdesc->report_desc_length;
1103         hidg->report_desc = kmemdup(fdesc->report_desc,
1104                                     fdesc->report_desc_length,
1105                                     GFP_KERNEL);
1106         if (!hidg->report_desc) {
1107                 kfree(hidg);
1108                 return -ENOMEM;
1109         }
1110
1111         hidg->func.name    = "hid";
1112         hidg->func.strings = ct_func_strings;
1113         hidg->func.bind    = hidg_bind;
1114         hidg->func.unbind  = hidg_unbind;
1115         hidg->func.set_alt = hidg_set_alt;
1116         hidg->func.disable = hidg_disable;
1117         hidg->func.setup   = hidg_setup;
1118
1119         status = usb_add_function(c, &hidg->func);
1120         if (status)
1121                 kfree(hidg);
1122         else
1123         g_hidg = hidg;
1124     g_hidg->u_cdev = c->cdev;
1125         return status;
1126 }
1127
1128 int ghid_setup(struct usb_gadget *g, int count)
1129 {
1130         int status;
1131         dev_t dev;
1132
1133         hidg_class = class_create(THIS_MODULE, "hidg");
1134
1135         status = alloc_chrdev_region(&dev, 0, count, "hidg");
1136         if (!status) {
1137                 major = MAJOR(dev);
1138                 minors = count;
1139         }
1140
1141         return status;
1142 }
1143
1144 void ghid_cleanup(void)
1145 {
1146         if (major) {
1147                 unregister_chrdev_region(MKDEV(major, 0), minors);
1148                 major = minors = 0;
1149         }
1150
1151         class_destroy(hidg_class);
1152 }