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hid-input.c

/*
 * $Id: hid-input.c,v 1.1 2004/01/20 00:28:13 pingc Exp $
 *
 *  Copyright (c) 2000-2001 Vojtech Pavlik
 *
 *  USB HID to Linux Input mapping module
 *
 *  Sponsored by SuSE
 */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Should you need to contact me, the author, you can do so either by
 * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
 * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
 */

#include <linux/autoconf.h>
#if defined(CONFIG_MODVERSIONS) && !defined(MODVERSIONS)
#   define MODVERSIONS
#endif

#ifdef MODVERSIONS
#include <linux/modversions.h>
#endif

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/input.h>
#include <linux/usb.h>

#include "hid.h"

#define unk KEY_UNKNOWN

static unsigned char hid_keyboard[256] = {
        0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
       50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
        4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
       27, 43, 84, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
       65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
      105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
       72, 73, 82, 83, 86,127,116,117, 85, 89, 90, 91, 92, 93, 94, 95,
      120,121,122,123,134,138,130,132,128,129,131,137,133,135,136,113,
      115,114,unk,unk,unk,124,unk,181,182,183,184,185,186,187,188,189,
      190,191,192,193,194,195,196,197,198,unk,unk,unk,unk,unk,unk,unk,
      unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
      unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
      unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
      unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
       29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
      150,158,159,128,136,177,178,176,142,152,173,140,unk,unk,unk,unk
};

static struct {
      __s32 x;
      __s32 y;
}  hid_hat_to_axis[] = {{0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};

static void hidinput_configure_usage(struct hid_device *device, struct hid_field *field, struct hid_usage *usage)
{
      struct input_dev *input = &device->input;
      int max;
      unsigned long *bit;

      switch (usage->hid & HID_USAGE_PAGE) {

            case HID_UP_KEYBOARD:

                  set_bit(EV_REP, input->evbit);
                  usage->type = EV_KEY; bit = input->keybit; max = KEY_MAX;

                  if ((usage->hid & HID_USAGE) < 256) {
                        if (!(usage->code = hid_keyboard[usage->hid & HID_USAGE]))
                              return;
                        clear_bit(usage->code, bit);
                  } else
                        usage->code = KEY_UNKNOWN;

                  break;

            case HID_UP_BUTTON:

                  usage->code = ((usage->hid - 1) & 0xf) + 0x100;
                  usage->type = EV_KEY; bit = input->keybit; max = KEY_MAX;

                  switch (field->application) {
                        case HID_GD_GAMEPAD:  usage->code += 0x10;
                        case HID_GD_JOYSTICK: usage->code += 0x10;
                        case HID_GD_MOUSE:    usage->code += 0x10; break;
                        default:
                              if (field->physical == HID_GD_POINTER)
                                    usage->code += 0x10;
                              break;
                  }
                  break;

            case HID_UP_GENDESK:

                  if ((usage->hid & 0xf0) == 0x80) {  /* SystemControl */
                        switch (usage->hid & 0xf) {
                              case 0x1: usage->code = KEY_POWER;  break;
                              case 0x2: usage->code = KEY_SLEEP;  break;
                              case 0x3: usage->code = KEY_WAKEUP; break;
                              default: usage->code = KEY_UNKNOWN; break;
                        }
                        usage->type = EV_KEY; bit = input->keybit; max = KEY_MAX;
                        break;
                  }

                  usage->code = usage->hid & 0xf;

                  if (field->report_size == 1) {
                        usage->code = BTN_MISC;
                        usage->type = EV_KEY; bit = input->keybit; max = KEY_MAX;
                        break;
                  }

                  if (field->flags & HID_MAIN_ITEM_RELATIVE) {
                        usage->type = EV_REL; bit = input->relbit; max = REL_MAX;
                        break;
                  }

                  usage->type = EV_ABS; bit = input->absbit; max = ABS_MAX;

                  if (usage->hid == HID_GD_HATSWITCH) {
                        usage->code = ABS_HAT0X;
                        usage->hat_min = field->logical_minimum;
                        usage->hat_max = field->logical_maximum;
                  }
                  break;

            case HID_UP_LED:

                  usage->code = (usage->hid - 1) & 0xf;
                  usage->type = EV_LED; bit = input->ledbit; max = LED_MAX;
                  break;

            case HID_UP_DIGITIZER:

                  switch (usage->hid & 0xff) {

                        case 0x30: /* TipPressure */

                              if (!test_bit(BTN_TOUCH, input->keybit)) {
                                    device->quirks |= HID_QUIRK_NOTOUCH;
                                    set_bit(EV_KEY, input->evbit);
                                    set_bit(BTN_TOUCH, input->keybit);
                              }
                              usage->type = EV_ABS; bit = input->absbit; max = ABS_MAX;
                              usage->code = ABS_PRESSURE;
                              clear_bit(usage->code, bit);
                              break;

                        case 0x32: /* InRange */

                              usage->type = EV_KEY; bit = input->keybit; max = KEY_MAX;
                              switch (field->physical & 0xff) {
                                    case 0x21: usage->code = BTN_TOOL_MOUSE; break;
                                    case 0x22: usage->code = BTN_TOOL_FINGER; break;
                                    default: usage->code = BTN_TOOL_PEN; break;
                              }
                              break;

                        case 0x3c: /* Invert */

                              usage->type = EV_KEY; bit = input->keybit; max = KEY_MAX;
                              usage->code = BTN_TOOL_RUBBER;
                              clear_bit(usage->code, bit);
                              break;

                        case 0x33: /* Touch */
                        case 0x42: /* TipSwitch */
                        case 0x43: /* TipSwitch2 */

                              device->quirks &= ~HID_QUIRK_NOTOUCH;
                              usage->type = EV_KEY; bit = input->keybit; max = KEY_MAX;
                              usage->code = BTN_TOUCH;
                              clear_bit(usage->code, bit);
                              break;

                        case 0x44: /* BarrelSwitch */

                              usage->type = EV_KEY; bit = input->keybit; max = KEY_MAX;
                              usage->code = BTN_STYLUS;
                              clear_bit(usage->code, bit);
                              break;

                        default:  goto unknown;
                  }
                  break;

            case HID_UP_CONSUMER:   /* USB HUT v1.1, pages 56-62 */

                  switch (usage->hid & HID_USAGE) {
                        case 0x000: usage->code = 0; break;
                        case 0x034: usage->code = KEY_SLEEP;            break;
                        case 0x036: usage->code = BTN_MISC;       break;
                        case 0x08a: usage->code = KEY_WWW;        break;
                        case 0x095: usage->code = KEY_HELP;       break;

                        case 0x0b4: usage->code = KEY_REWIND;           break;
                        case 0x0b5: usage->code = KEY_NEXTSONG;         break;
                        case 0x0b6: usage->code = KEY_PREVIOUSSONG;     break;
                        case 0x0b7: usage->code = KEY_STOPCD;           break;
                        case 0x0b8: usage->code = KEY_EJECTCD;          break;
                        case 0x0cd: usage->code = KEY_PLAYPAUSE;  break;

                        case 0x0e2: usage->code = KEY_MUTE;       break;
                        case 0x0e9: usage->code = KEY_VOLUMEUP;         break;
                        case 0x0ea: usage->code = KEY_VOLUMEDOWN; break;

                        case 0x183: usage->code = KEY_CONFIG;           break;
                        case 0x18a: usage->code = KEY_MAIL;       break;
                        case 0x192: usage->code = KEY_CALC;       break;
                        case 0x194: usage->code = KEY_FILE;       break;

                        case 0x21a: usage->code = KEY_UNDO;       break;
                        case 0x21b: usage->code = KEY_COPY;       break;
                        case 0x21c: usage->code = KEY_CUT;        break;
                        case 0x21d: usage->code = KEY_PASTE;            break;

                        case 0x221: usage->code = KEY_FIND;       break;
                        case 0x223: usage->code = KEY_HOMEPAGE;         break;
                        case 0x224: usage->code = KEY_BACK;       break;
                        case 0x225: usage->code = KEY_FORWARD;          break;
                        case 0x226: usage->code = KEY_STOP;       break;
                        case 0x227: usage->code = KEY_REFRESH;          break;
                        case 0x22a: usage->code = KEY_BOOKMARKS;  break;

                        default:    usage->code = KEY_UNKNOWN;          break;

                  }

                  usage->type = EV_KEY; bit = input->keybit; max = KEY_MAX;
                  break;

            default:
            unknown:

                  if (field->report_size == 1) {

                        if (field->report->type == HID_OUTPUT_REPORT) {
                              usage->code = LED_MISC;
                              usage->type = EV_LED; bit = input->ledbit; max = LED_MAX;
                              break;
                        }

                        usage->code = BTN_MISC;
                        usage->type = EV_KEY; bit = input->keybit; max = KEY_MAX;
                        break;
                  }

                  if (field->flags & HID_MAIN_ITEM_RELATIVE) {
                        usage->code = REL_MISC;
                        usage->type = EV_REL; bit = input->relbit; max = REL_MAX;
                        break;
                  }

                  usage->code = ABS_MISC;
                  usage->type = EV_ABS; bit = input->absbit; max = ABS_MAX;
                  break;
      }

      set_bit(usage->type, input->evbit);

      while (usage->code <= max && test_and_set_bit(usage->code, bit)) {
            usage->code = find_next_zero_bit(bit, max + 1, usage->code);
      }

      if (usage->code > max) return;

      if (usage->type == EV_ABS) {
            int a = field->logical_minimum;
            int b = field->logical_maximum;

            input->absmin[usage->code] = a;
            input->absmax[usage->code] = b;
            input->absfuzz[usage->code] = (b - a) >> 8;
            input->absflat[usage->code] = (b - a) >> 4;
      }

      if (usage->hat_min != usage->hat_max) {
            int i;
            for (i = usage->code; i < usage->code + 2 && i <= max; i++) {
                  input->absmax[i] = 1;
                  input->absmin[i] = -1;
                  input->absfuzz[i] = 0;
                  input->absflat[i] = 0;
            }
            set_bit(usage->code + 1, input->absbit);
      }
}

void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value)
{
      struct input_dev *input = &hid->input;
      int *quirks = &hid->quirks;

      if (usage->hat_min != usage->hat_max) {
            value = (value - usage->hat_min) * 8 / (usage->hat_max - usage->hat_min + 1) + 1;
            if (value < 0 || value > 8) value = 0;
            input_event(input, usage->type, usage->code    , hid_hat_to_axis[value].x);
            input_event(input, usage->type, usage->code + 1, hid_hat_to_axis[value].y);
            return;
      }

      if (usage->hid == (HID_UP_DIGITIZER | 0x003c)) { /* Invert */
            *quirks = value ? (*quirks | HID_QUIRK_INVERT) : (*quirks & ~HID_QUIRK_INVERT);
            return;
      }

      if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
            if (value) {
                  input_event(input, usage->type, (*quirks & HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
                  return;
            }
            input_event(input, usage->type, usage->code, 0);
            input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
            return;
      }

      if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & HID_QUIRK_NOTOUCH)) { /* Pressure */
            int a = field->logical_minimum;
            int b = field->logical_maximum;
            input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 3));
      }

      if((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is "unassigned", not KEY_UKNOWN */
            return;

      input_event(input, usage->type, usage->code, value);

      if ((field->flags & HID_MAIN_ITEM_RELATIVE) && (usage->type == EV_KEY))
            input_event(input, usage->type, usage->code, 0);
}

static int hidinput_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
      struct hid_device *hid = dev->private;
      struct hid_field *field = NULL;
      int offset;

      if ((offset = hid_find_field(hid, type, code, &field)) == -1) {
            warn("event field not found");
            return -1;
      }

      hid_set_field(field, offset, value);
      hid_write_report(hid, field->report);

      return 0;
}

static int hidinput_open(struct input_dev *dev)
{
      struct hid_device *hid = dev->private;
      return hid_open(hid);
}

static void hidinput_close(struct input_dev *dev)
{
      struct hid_device *hid = dev->private;
      hid_close(hid);
}

/*
 * Register the input device; print a message.
 * Configure the input layer interface
 * Read all reports and initalize the absoulte field values.
 */

int hidinput_connect(struct hid_device *hid)
{
      struct usb_device *dev = hid->dev;
      struct hid_report_enum *report_enum;
      struct hid_report *report;
      struct list_head *list;
      int i, j, k;

      for (i = 0; i < hid->maxapplication; i++)
            if (IS_INPUT_APPLICATION(hid->application[i]))
                  break;

      if (i == hid->maxapplication)
            return -1;

      hid->input.private = hid;
      hid->input.event = hidinput_input_event;
      hid->input.open = hidinput_open;
      hid->input.close = hidinput_close;

      hid->input.name = hid->name;
      hid->input.idbus = BUS_USB;
      hid->input.idvendor = dev->descriptor.idVendor;
      hid->input.idproduct = dev->descriptor.idProduct;
      hid->input.idversion = dev->descriptor.bcdDevice;

      for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
            report_enum = hid->report_enum + k;
            list = report_enum->report_list.next;
            while (list != &report_enum->report_list) {
                  report = (struct hid_report *) list;
                  for (i = 0; i < report->maxfield; i++)
                        for (j = 0; j < report->field[i]->maxusage; j++)
                              hidinput_configure_usage(hid, report->field[i], report->field[i]->usage + j);
                  list = list->next;
            }
      }

      input_register_device(&hid->input);

      return 0;
}

void hidinput_disconnect(struct hid_device *hid)
{
      input_unregister_device(&hid->input);
}

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