joycon command handling

brcm_flash.c

unsigned __int8 *__fastcall process_cmd(struct_a1 *a1, int a2, int a3, unsigned __int8 *pkt, signed int pkt_len)
{
  unsigned __int8 *pkt_; // r0@1 MAPDST
  int v10; // r0@2
  int v11; // r12@8
  unsigned __int8 v12; // r0@13
  signed int b0; // r0@15
  int v14; // r0@38
  unsigned __int8 v15; // r1@46
  unsigned int v16; // r2@51
  unsigned __int8 *v17; // r1@51
  unsigned __int8 *v18; // r0@51
  unsigned __int8 v19[308]; // [sp+0h] [bp-168h]@49
  struct_a1 *v20; // [sp+134h] [bp-34h]@1
  int v21; // [sp+138h] [bp-30h]@1
  int v22; // [sp+13Ch] [bp-2Ch]@1
  unsigned __int8 *v23; // [sp+140h] [bp-28h]@1

  v20 = a1;
  v21 = a2;
  v22 = a3;
  v23 = pkt;
  pkt_ = (unsigned __int8 *)nullsub_17(pkt_len);
  if ( pkt_ )
  {
    memcpy(pkt_, pkt, pkt_len);
    v10 = a1->dword1D4;
    if ( v10 == v21 && *(_BYTE *)(v10 + 4) == 2 )
    {
      if ( a3 != 2 )
        goto LABEL_59;
      if ( *pkt == 0x92 )
      {
        crc8(a1, pkt, 6u);
        if ( pkt_len )
          crc8(a1, (unsigned __int8 *)(v11 + 7), pkt_len - 7);
        a1->byte127E = 1;
        memcpy(pkt_, pkt + 7, pkt_len - 7);     // just remove the prefix hdr
        a1->dword268 = dword_6FBC8();
      }
    }
    else if ( a3 != 2 )
    {
      goto LABEL_59;
    }
    if ( a1->dword44 == v21 && byte_DB2B2 )
    {
      v12 = pkt_[1];
      BYTE1(dword_2207B4) = v12 & 0xF;
      if ( (v12 & 0xF) == BYTE2(dword_2207B4) )
        goto LABEL_59;
      BYTE2(dword_2207B4) = v12 & 0xF;
    }
    b0 = *pkt_;
    if ( b0 != 0x14 )
    {
      if ( b0 > 0x14 )
      {
        if ( b0 == 0x91 )
        {
          wiredCmdProcess(a1, pkt_);
        }
        else if ( b0 > 0x91 )
        {
          if ( b0 == 0x93 )
          {
            memset(byte_220FCB, 0, 0x187u);
            memcpy(&byte_220FCB[7], pkt_ + 7, (unsigned __int16)(pkt_len - 7));
            byte_220E44[0] = 0x93u;
            *(_WORD *)&byte_220E44[2] = 0x26;
            sub_21CB94(1, byte_220E44, 0x2D);
          }
          else if ( b0 == 0xA5 )
          {
            handle_cmd_a5(a1, pkt_);
          }
        }
        else if ( b0 != 0x1F && (b0 == 0x43 || b0 == 0x53) )
        {
          sub_21FA6C(a1, pkt_, (unsigned __int16)pkt_len);
        }
      }
      else if ( b0 == 0x11 )
      {
        if ( hid_device_type != 1 )
        {
          memset(byte_221318, 0, 0x200u);
          memset(byte_221518, 0, 0x200u);
          if ( a1->uart_active? )
          {
            memcpy(byte_221318, pkt_ + 10, 1u);
            byte_221318[1] = 1;
            memcpy(&byte_221318[2], pkt_ + 2, 8u);
            v16 = 37;
            v17 = pkt_ + 11;
            v18 = &byte_221318[10];
            goto LABEL_58;
          }
        }
      }
      else if ( b0 > 0x11 )
      {
        if ( b0 == 0x12 )
        {
          memset(byte_220E44, 0, 0x187u);
          memcpy(&byte_220E44[7], pkt_ + 10, 0x26u);
        }
      }
      else if ( b0 == 1 )
      {
        if ( a1->uart_active? )
        {
          memset(byte_221318, 0, 0x200u);
          memset(byte_221518, 0, 0x200u);
          byte_221318[0] = 5;
          if ( pkt_[10] == 0x48 )
          {
            if ( pkt_[11] == 1 )
              v15 = 0x48;
            else
              v15 = 0x49;
            byte_221318[1] = v15;
          }
          else
          {
            byte_221318[1] = 1;
          }
          memcpy(&byte_221318[2], pkt_ + 2, 8u);
          v14 = pkt_[10];
          if ( v14 != 0x20 && v14 != 0x21 && v14 != 0x22 )
            unknown_xfer_cmd(0x139, byte_221318, byte_221518);
        }
        handle_cmd_01(a1, pkt_);
        if ( a1->uart_active? )
          goto LABEL_43;
      }
      else
      {
        if ( b0 == 3 )
        {
          memset(v19, 0, 0x134u);
          memcpy(v19, pkt_ + 10, 0x134u);
          sub_21FB8A(v19);
          goto LABEL_59;
        }
        if ( b0 == 0x10 && a1->uart_active? )
        {
          memset(byte_221318, 0, 0x200u);
          memset(byte_221518, 0, 0x200u);
          byte_221318[0] = 5;
          byte_221318[1] = 1;
          v16 = 8;
          v17 = pkt_ + 2;
          v18 = &byte_221318[2];
LABEL_58:
          memcpy(v18, v17, v16);
          unknown_xfer_cmd(0x139, byte_221318, byte_221518);
LABEL_43:
          byte_2207BA = byte_221518[0];
          goto LABEL_59;
        }
      }
    }
LABEL_59:
    JUMPOUT(dword_724B4);
  }
  return pkt_;
}

void __fastcall wiredCmdProcess(struct_a1 *bt, unsigned __int8 *pkt)
{
  signed int cmd; // r9@1
  unsigned int len; // r5@1
  signed int b4; // r7@1
  unsigned __int8 *pkt_data; // r6@1
  unsigned __int8 *v9; // r7@23
  unsigned __int8 v10; // r0@28
  int v11; // r1@29
  signed int v12; // r0@29
  int v13; // r2@30
  struct_a1 *v14; // r0@31
  int v15; // r2@39
  unsigned __int8 *v16; // r1@39
  char v17; // r0@50
  int v18; // r0@51
  char v19; // r0@56
  char *v20; // r4@57
  char v21; // r0@57
  char v22; // r1@68
  unsigned __int8 *v23; // r1@69
  void (*v24)(void); // r2@81
  char v25; // t1@86
  unsigned __int8 *v26; // r1@93
  int v27; // r0@94
  int v28; // r1@99
  char v29; // r0@105
  char *v30; // r5@111
  void *v31; // r12@113
  signed int v32; // r0@113
  int v33; // r1@113
  unsigned int v34; // r2@122
  char *v35; // r0@123
  signed int v36; // r1@123
  char v37; // t1@124
  void *v38; // r0@125
  char v39; // r7@126
  unsigned int v40; // r0@127
  char *v41; // r2@128
  char v42; // t1@128
  signed int v43; // r0@129
  char *v44; // r2@130
  char v45; // t1@130
  int v46; // r1@131
  signed int v47; // r0@131
  int v48; // r2@132
  unsigned int v49; // r0@133
  unsigned __int8 v50; // r2@134
  unsigned int v51; // r0@136
  int *v52; // r0@141
  char v53; // r1@142
  char v54; // r1@144
  char v55; // r1@146
  char v56; // r0@147
  unsigned int v57; // r0@138
  signed int v58; // r0@149
  int v59; // r2@150
  char v60; // r7@139
  int v61; // r3@139
  signed int i; // r0@163
  char v63; // t1@164
  char v64[399]; // [sp+0h] [bp-1D8h]@1
  unsigned __int8 v65[15]; // [sp+190h] [bp-48h]@1
  char v66[16]; // [sp+1A0h] [bp-38h]@138
  unsigned __int8 v67[4]; // [sp+1B0h] [bp-28h]@111

  memset(&v64[8], 0, 0x187u);
  memset(v65, 0, 0xFu);
  cmd = pkt[1];
  len = (unsigned __int16)(pkt[2] + (pkt[3] << 8));
  b4 = pkt[4];
  pkt_data = pkt + 7;
  crc8(bt, pkt, 6u);
  if ( len )
    crc8(bt, pkt_data, len);
  if ( bt->field_27B != 3 )
  {
    printf_disabled("wiredCmdProcess got wrong packet\n");
    return;
  }
  if ( cmd == 0x10 )
  {
    if ( b4 | len || *(_BYTE *)(bt->dword1D4 + 4) == 2 )
    {
      v64[8] = 0x94u;
      v64[9] = 16;
      goto LABEL_92;
    }
    (*(void (**)(void))(*(_DWORD *)bt->dword44 + 24))();
    v64[8] = 0x94u;
    v64[9] = 16;
    v64[12] = 0;
    *(_WORD *)&v64[10] = 0;
    v64[13] = 0;
    v64[14] = crc8(bt, (unsigned __int8 *)&v64[8], 6u);
    sub_21CB94(1, (unsigned __int8 *)&v64[8], *(unsigned __int16 *)&v64[10] + 7);
    bt->dword268 = dword_6FBC8();
    (*(void (**)(void))(*(_DWORD *)bt->dword1D4 + 20))();
    bt->dword268 = dword_6FBC8();
    if ( v64[12] )
      return;
    v24 = *(void (**)(void))(*(_DWORD *)bt->dword1D4 + 8);
LABEL_100:
    v24();
    return;
  }
  if ( cmd <= 0x10 )
  {
    switch ( cmd )
    {
      case 0:
        return;
      case 1:
        if ( b4 || len && len > 0x14 )
        {
          v65[4] = 0xF;
        }
        else
        {
          v9 = &v65[8];
          if ( strncmp_or_memcmp(hid_device_name, "Joy-Con (L)", 11) )
          {
            if ( strncmp_or_memcmp(hid_device_name, "Pro Controller", 14) )
            {
              if ( strncmp_or_memcmp(hid_device_name, "Joy-Con Charging Grip", 21) )
              {
                if ( strncmp_or_memcmp(hid_device_name, "Joy-Con (R)", 11)
                  && strncmp_or_memcmp(hid_device_name, "Joy-Con (R)", 11) )
                {
                  v10 = -1;
                }
                else
                {
                  v10 = 2;
                }
              }
              else
              {
                v10 = 0x11;
              }
            }
            else
            {
              v10 = 3;
            }
          }
          else
          {
            v10 = 1;
          }
          v65[7] = v10;
          v65[4] = 0;
          v11 = ((int (__fastcall *)(_DWORD))word_50D22)(bt->dword44);
          v12 = 0;
          do
          {
            v13 = 5 - v12++;
            *v9++ = *(_BYTE *)(v11 + v13);
          }
          while ( v12 < 6 );
          v14 = bt + 1;
          if ( len )
            memcpy(v14, pkt_data, len);
          else
            memset(v14, 0, 0x14u);
        }
        v65[0] = 0x94u;
        v65[1] = 1;
        *(_WORD *)&v65[2] = 8;
        v65[5] = crc8(bt, &v65[7], 8u);
        v65[6] = crc8(bt, v65, 6u);
        v15 = 15;
        v16 = v65;
        goto LABEL_52;
      case 2:
        if ( b4 || len != 4 )
        {
          v64[12] = 0xF;
        }
        else
        {
          v18 = *pkt_data;
          bt->field_1E4 = v18;
          nullsub_4(1, 7, (v18 << 29 >> 31) + 1);
          nullsub_4(1, 15, ((unsigned int)(unsigned __int8)bt->field_1E4 >> 4) & 1);
          sub_21C578(bt->field_1E4);
          v64[12] = 0;
        }
        v64[8] = 0x94u;
        v64[9] = 2;
        v17 = 0;
        *(_WORD *)&v64[10] = 0;
        goto LABEL_104;
      case 3:
        if ( b4 | len )
        {
          *(_WORD *)&v64[10] = 4;
          v64[12] = 0xF;
          memset(&v64[15], 0, 4u);
        }
        else
        {
          bt->field_1E4 = 0;
          bt->field_1E4 |= ((int (__fastcall *)(_DWORD, signed int))word_6EB1A)(0, 4) == 0;
          bt->field_1E4 |= 2 * (((int (__fastcall *)(signed int))word_6EB1A)(2) == 0);
          v20 = &bt->field_1E4;
          *v20 |= 4 * (((int (__fastcall *)(signed int, signed int))dword_6EB08[0])(1, 7) == 0);
          *v20 |= 16 * ((unsigned __int8 (__fastcall *)(signed int, signed int))dword_6EB08[0])(1, 15);
          *(_WORD *)&v64[10] = 4;
          v64[12] = 0;
          v21 = *v20;
          v64[16] = 0;
          v64[17] = 0;
          bt = (struct_a1 *)(v20 - 484);
          v64[15] = v21;
          v64[18] = 0;
        }
        v64[8] = 0x94u;
        v19 = 3;
        break;
      case 4:
        if ( b4 || len != 4 )
        {
          v64[12] = 0xF;
        }
        else
        {
          bt->field_1E5 = *pkt_data;
          v64[12] = 0;
        }
        v64[8] = 0x94u;
        v64[9] = 4;
        *(_WORD *)&v64[10] = 0;
        goto LABEL_93;
      case 5:
        if ( b4 | len )
        {
          *(_WORD *)&v64[10] = 4;
          v64[12] = 0xF;
          memset(&v64[15], 0, 4u);
        }
        else
        {
          *(_WORD *)&v64[10] = 4;
          v64[12] = 0;
          v22 = bt->field_1E5;
          v64[16] = 0;
          v64[17] = 0;
          v64[15] = v22;
          v64[18] = 0;
        }
        v64[8] = 0x94u;
        v19 = 5;
        break;
      case 6:
        if ( b4 | len )
        {
          *(_WORD *)&v64[10] = 4;
          v64[12] = 0xF;
          memset(&v64[15], 0, 4u);
        }
        else
        {
          v64[12] = 0;
          *(_WORD *)&v64[15] = word_220C18;
          v64[17] = 0;
          *(_WORD *)&v64[10] = 4;
          v64[18] = 0;
        }
        v64[8] = 0x94u;
        v19 = 6;
        break;
      case 7:
        if ( b4 | len )
        {
          *(_WORD *)&v64[10] = 4;
          v64[12] = 0xF;
          memset(&v64[15], 0, 4u);
        }
        else
        {
          *(_WORD *)&v64[10] = 4;
          v64[12] = 0;
          v64[15] = bt->field_1E8;
          v64[16] = (unsigned __int16)bt->field_1E8 >> 8;
          v64[17] = 0;
          v64[18] = 0;
          bt->field_1E8 = 0;
        }
        v64[8] = 0x94u;
        v19 = 7;
        break;
    }
    v64[9] = v19;
LABEL_166:
    v34 = *(unsigned __int16 *)&v64[10];
    goto LABEL_69;
  }
  if ( cmd != 24 )
  {
    if ( cmd > 24 )
    {
      if ( cmd == 0x20 )
      {
        if ( !b4 && len == 8 )
        {
          *(_DWORD *)v64 = 0;
          *(_DWORD *)&v64[4] = 0;
          memcpy(&v64[2], pkt_data, 4u);
          bt->field_1EC = *pkt_data + (pkt_data[1] << 8) + (pkt_data[2] << 16) + (pkt_data[3] << 24);
          v64[8] = 0x94u;
          v64[9] = 0x20;
          v64[12] = 0;
          *(_WORD *)&v64[10] = 0;
          v64[13] = 0;
          v64[14] = crc8(bt, (unsigned __int8 *)&v64[8], 6u);
          sub_21CB94(1, (unsigned __int8 *)&v64[8], *(unsigned __int16 *)&v64[10] + 7);
          sub_21C70A((unsigned __int8 *)v64);
          ((void (__fastcall *)(_DWORD))dword_52648[0])(*(_DWORD *)&bt->gap21E[26]);
          ((void (__fastcall *)(_DWORD, signed int))dword_52620[0])(*(_DWORD *)&bt->gap21E[26], 2000);
          return;
        }
        v64[8] = 0x94u;
        v64[9] = 32;
        v64[12] = 0xF;
        *(_WORD *)&v64[10] = 0;
        v64[13] = 0;
        v23 = (unsigned __int8 *)&v64[8];
        goto LABEL_157;
      }
      if ( cmd != 64 )
        return;
      if ( b4 || !len )
      {
        v64[8] = 0x94u;
        v64[9] = 64;
        v34 = 0;
        *(_WORD *)&v64[10] = 0;
        v64[12] = 0xF;
        goto LABEL_69;
      }
      v64[8] = 0x94u;
      v64[9] = 64;
      *(_WORD *)&v64[10] = len;
      v64[12] = 0;
      if ( len > 0x180 )
        len = 384;
      for ( i = 0; i < (signed int)len; ++i )
      {
        v63 = *pkt_data++;
        v64[i + 15] = v63;
      }
      goto LABEL_166;
    }
    if ( cmd == 0x11 )
    {
      if ( !(b4 | len) && *(_BYTE *)(bt->dword1D4 + 4) == 2 )
      {
        v64[8] = 0x94u;
        v64[9] = 17;
        v64[12] = 0;
        *(_WORD *)&v64[10] = 0;
        v64[13] = 0;
        v64[14] = crc8(bt, (unsigned __int8 *)&v64[8], 6u);
        *(_DWORD *)v64 = 1;
        *(_DWORD *)&v64[4] = 0;
        (*(void (__cdecl **)(_DWORD, char *))(*(_DWORD *)bt->dword1D4 + 36))(bt->dword1D4, &v64[8]);
        delay(50000);
        (*(void (**)(void))(*(_DWORD *)bt->dword1D4 + 24))();
        v25 = bt->gap27C[0];
        sub_219500(bt, 1000000u);
        return;
      }
      v64[8] = 0x94u;
      v64[9] = 17;
      goto LABEL_92;
    }
    if ( cmd != 18 )
    {
      if ( cmd != 19 )
        return;
      if ( !(b4 | len) && *(_BYTE *)(bt->dword1D4 + 4) == 2 )
      {
        v64[8] = 0x94u;
        v64[9] = 19;
        *(_WORD *)&v64[10] = 4;
        v64[12] = 0;
        v29 = *((_BYTE *)&bt->field_1E8 + 2);
        v64[16] = 0;
        v64[15] = v29;
        v64[17] = 0;
        v64[18] = 0;
        v64[13] = crc8(bt, (unsigned __int8 *)&v64[15], 4u);
        v64[14] = crc8(bt, (unsigned __int8 *)&v64[8], 6u);
        *(_DWORD *)v64 = 1;
        *(_DWORD *)&v64[4] = 0;
        (*(void (__cdecl **)(_DWORD, char *))(*(_DWORD *)bt->dword1D4 + 36))(bt->dword1D4, &v64[8]);
        return;
      }
      v64[8] = 0x94u;
      v64[9] = 19;
      *(_WORD *)&v64[10] = 4;
      v64[12] = 0xF;
      memset(&v64[15], 0, 4u);
      v17 = crc8(bt, (unsigned __int8 *)&v64[15], 4u);
LABEL_104:
      v64[13] = v17;
      v26 = (unsigned __int8 *)&v64[8];
      goto LABEL_63;
    }
    if ( b4 || len != 4 || *(_BYTE *)(bt->dword1D4 + 4) != 2 )
    {
      v64[8] = 0x94u;
      v64[9] = 0x12;
LABEL_92:
      *(_WORD *)&v64[10] = 0;
      v64[12] = 0xF;
LABEL_93:
      v64[13] = 0;
      v26 = (unsigned __int8 *)&v64[8];
LABEL_63:
      v64[14] = crc8(bt, v26, 6u);
      v15 = 7;
      goto LABEL_158;
    }
    v27 = *pkt_data;
    *((_BYTE *)&bt->field_1E8 + 2) = v27;
    v64[12] = v27 != 5 && v27 != 10 && v27 != 15;
    v64[8] = 0x94u;
    v64[9] = 0x12;
    *(_WORD *)&v64[10] = 0;
    v64[13] = 0;
    v64[14] = crc8(bt, (unsigned __int8 *)&v64[8], 6u);
    *(_DWORD *)v64 = 1;
    *(_DWORD *)&v64[4] = 0;
    (*(void (__cdecl **)(_DWORD, char *))(*(_DWORD *)bt->dword1D4 + 36))(bt->dword1D4, &v64[8]);
    if ( v64[12] )
      return;
    v28 = 1000 * *((unsigned __int8 *)&bt->field_1E8 + 2);
    v24 = *(void (**)(void))(*(_DWORD *)bt->dword1D4 + 8);
    goto LABEL_100;
  }
  if ( len != 0x20 || b4 != 1 && b4 != 2 && b4 != 3 && b4 != 4 )
    goto LABEL_121;
  v30 = &v64[15];
  *(_DWORD *)v67 = 0x82500;
  memset(&v64[15], 0, 0x20u);
  *(_DWORD *)&v64[4] = (char *)bt + 496;
  if ( b4 == 4 )
  {
    if ( !((int (__fastcall *)(_DWORD))word_4E602)(*(_DWORD *)(bt->dword44 + 24)) )
      goto LABEL_170;
    v31 = (void *)(*(int (**)(void))(**(_DWORD **)(bt->dword44 + 24) + 52))();
    v32 = 6;
    v33 = 0;
    do
    {
      *((_BYTE *)&bt->field_1EC + v32 + 3) = pkt_data[v33];
      v32 = (unsigned __int8)(v32 - 1);
      v33 = (unsigned __int8)(v33 + 1);
    }
    while ( v32 );
    if ( strncmp_or_memcmp(*(void **)&v64[4], v31, 6) )
LABEL_170:
      b4 = 1;
  }
  if ( b4 == 1 )
  {
    v35 = &bt->bdaddr[5];
    v36 = 0;
    do
    {
      v37 = *pkt_data++;
      ++v36;
      *v35-- = v37;
    }
    while ( v36 < 6 );
    v38 = (void *)(*(int (**)(void))(**(_DWORD **)(bt->dword44 + 24) + 52))();
    if ( !strncmp_or_memcmp(*(void **)&v64[4], v38, 6) )
    {
      v39 = sflash_available;
      sflash_available = 0;
      (*(void (**)(void))(*(_DWORD *)bt->dword44 + 160))();
      sflash_available = v39;
    }
    v40 = 0;
    do
    {
      v41 = &bt->gap0[v40];
      v42 = *pkt_data++;
      ++v40;
      v41[518] = v42;
    }
    while ( v40 < 3 );
    memset(bt->field_209, 0, 0x14u);
    v43 = 0;
    do
    {
      v44 = &bt->gap0[v43];
      v45 = *pkt_data++;
      ++v43;
      v44[521] = v45;
    }
    while ( v43 < 20 );
    bt->field_209[20] = *pkt_data;
    v46 = ((int (__fastcall *)(_DWORD))word_50D22)(bt->dword44);
    v47 = 0;
    do
    {
      v48 = 5 - v47++;
      *v30++ = *(_BYTE *)(v46 + v48);
    }
    while ( v47 < 6 );
    v49 = 0;
    do
    {
      v50 = v67[v49++];
      *v30++ = v50;
    }
    while ( v49 < 3 );
    if ( hid_device_type == 1 )
    {
      v52 = &dword_0;
      do
      {
        v53 = *((_BYTE *)v52 + (_DWORD)"Joy-Con (L)");
        v52 = (int *)((char *)v52 + 1);
        *v30++ = v53;
      }
      while ( (unsigned int)v52 < 0xC );
    }
    else
    {
      v51 = (unsigned int)&dword_0;
      if ( hid_device_type == 3 )
      {
        do
        {
          v55 = aProControlle_1[v51++];
          *v30++ = v55;
        }
        while ( v51 < 0xF );
      }
      else
      {
        do
        {
          v54 = aJoyConR_1[v51++];
          *v30++ = v54;
        }
        while ( v51 < 0xC );
      }
    }
    v30[8] = 0x68;
    v56 = 1;
    goto LABEL_152;
  }
  *(_DWORD *)v64 = (char *)bt + 502;
  switch ( b4 )
  {
    case 2:
      memset(bt->field_1F6, 0, 0x10u);
      sub_DAC68(*(unsigned __int8 **)v64);
      memcpy(v66, *(void **)v64, 0x10u);
      v57 = 0;
      do
      {
        v66[v57] ^= 0xAAu;
        v57 = (unsigned __int8)(v57 + 1);
      }
      while ( v57 < 0x10 );
      v58 = 0;
      do
      {
        v59 = 15 - v58++;
        *v30++ = v66[v59];
      }
      while ( v58 < 16 );
      v56 = 2;
      goto LABEL_152;
    case 3:
      v60 = sflash_available;
      sflash_available = 0;
      v61 = (unsigned __int8)bt->field_209[20];
      (*(void (**)(void))(**(_DWORD **)(bt->dword44 + 24) + 20))();
      sflash_available = v60;
LABEL_153:
      v56 = 3;
LABEL_152:
      v64[12] = v56;
      goto LABEL_122;
    case 4:
      goto LABEL_153;
  }
LABEL_121:
  v64[12] = 0xF;
  memset(&v64[15], 0, 0x20u);
LABEL_122:
  v64[8] = 0x94u;
  v64[9] = 0x18;
  v34 = 0x20;
  *(_WORD *)&v64[10] = 0x20;
LABEL_69:
  v64[13] = crc8(bt, (unsigned __int8 *)&v64[15], v34);
  v23 = (unsigned __int8 *)&v64[8];
LABEL_157:
  v64[14] = crc8(bt, v23, 6u);
  v15 = *(unsigned __int16 *)&v64[10] + 7;
LABEL_158:
  v16 = (unsigned __int8 *)&v64[8];
LABEL_52:
  sub_21CB94(1, v16, v15);
}

void __fastcall handle_cmd_01(struct_a1 *bt, unsigned __int8 *buf)
{
  unsigned __int8 v2; // r3@1
  signed int subcmd; // r2@2
  unsigned __int8 v4; // r0@12

  v2 = 3;
  if ( !byte_22122C[0] )
  {
    byte_22122C[0] = 0x21;
    byte_22122C[14] = buf[10];
    subcmd = buf[10];
    if ( subcmd == 0x28 )
    {
      v4 = handle_cmd_01_28(bt, buf);
      goto LABEL_43;
    }
    if ( subcmd > 0x28 )
    {
      if ( subcmd == 0x41 )
      {
        v4 = handle_cmd_01_41(bt, buf);
        goto LABEL_43;
      }
      if ( subcmd <= 0x41 )
      {
        if ( subcmd == 0x30 )
        {
          v4 = handle_cmd_01_30(bt, buf);
          goto LABEL_43;
        }
        if ( subcmd <= 0x30 )
        {
          switch ( subcmd )
          {
            case 0x29:
              handle_cmd_01_29();
              return;
            case 0x2A:
              handle_cmd_01_2a(bt, buf);
              return;
            case 0x2B:
              handle_cmd_01_2b();
              return;
          }
          goto def_21D858;
        }
        switch ( subcmd )
        {
          case 0x31:
            handle_cmd_01_31(bt);
            return;
          case 0x38:
            v4 = handle_cmd_01_38(bt, buf);
            goto LABEL_43;
          case 0x40:
            v4 = handle_cmd_01_40(bt, buf);
            goto LABEL_43;
        }
def_21D858:
        byte_22122C[13] = (unsigned int)&dword_64[7];
        byte_22122C[15] = v2;
        return;
      }
      if ( subcmd == 0x50 )
      {
        handle_cmd_01_50();
        return;
      }
      if ( subcmd > 0x50 )
      {
        if ( subcmd != 0x51 )
        {
          if ( subcmd == 0x52 )
          {
            handle_cmd_01_52();
            return;
          }
          goto def_21D858;
        }
        v4 = handle_cmd_01_51(bt, buf);
        goto LABEL_43;
      }
      if ( subcmd == 0x42 )
      {
        v4 = handle_cmd_01_42(bt, buf);
        goto LABEL_43;
      }
      if ( subcmd == 0x43 )
      {
        handle_cmd_01_43(bt, buf);
        return;
      }
      if ( subcmd != 0x48 )
        goto def_21D858;
    }
    else
    {
      if ( subcmd == 8 )
      {
        sflash_set_5000(bt, buf);
        goto LABEL_43;
      }
      if ( subcmd <= 8 )
      {
        switch ( subcmd )
        {
          case 1:
            handle_cmd_01_01(bt, buf);
            return;
          case 2:
            handle_cmd_01_02(bt);
            return;
          case 3:
            byte_220BF9 = buf[11];
            goto LABEL_49;
          case 4:
            handle_cmd_01_04(bt);
            return;
          case 5:
            v4 = handle_cmd_01_05((int)bt);
            goto LABEL_43;
          case 6:
            v4 = handle_cmd_01_06(bt, buf);
            goto LABEL_43;
          case 7:
            v4 = sflash_erase_2000(bt);
            goto LABEL_43;
          default:
            goto def_21D858;
        }
        goto def_21D858;
      }
      if ( subcmd != 0x20 )
      {
        if ( subcmd > 0x20 )
        {
          if ( subcmd == 0x21 )
          {
            handle_cmd_01_21(bt, buf);
            return;
          }
          if ( subcmd != 0x22 )
            goto def_21D858;
          v4 = handle_cmd_01_22(bt, buf);
          goto LABEL_43;
        }
        switch ( subcmd )
        {
          case 0x10:
            handle_sflash_read(bt, buf);
            return;
          case 0x11:
            v4 = handle_sflash_write(bt, buf);
            goto LABEL_43;
          case 0x12:
            v4 = handle_sflash_erase(bt, buf);
LABEL_43:
            v2 = v4;
            goto def_21D858;
        }
        goto def_21D858;
      }
      sub_21E63A();
    }
LABEL_49:
    v2 = 0;
    goto def_21D858;
  }
}

If I upload this code to my joy-con, what is happening?