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