linux-imx

/*

 * Copyright (C) 2014  STMicroelectronics SAS. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * 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, see <http://www.gnu.org/licenses/>.

 */

​

#include <net/nfc/hci.h>

​

#include "st21nfca.h"

​

#define ST21NFCA_EVT_UICC_ACTIVATE      0x10

#define ST21NFCA_EVT_UICC_DEACTIVATE        0x13

#define ST21NFCA_EVT_SE_HARD_RESET      0x20

#define ST21NFCA_EVT_SE_SOFT_RESET      0x11

#define ST21NFCA_EVT_SE_END_OF_APDU_TRANSFER    0x21

#define ST21NFCA_EVT_SE_ACTIVATE        0x22

#define ST21NFCA_EVT_SE_DEACTIVATE      0x23

​

#define ST21NFCA_EVT_TRANSMIT_DATA      0x10

#define ST21NFCA_EVT_WTX_REQUEST        0x11

​

#define ST21NFCA_EVT_CONNECTIVITY       0x10

#define ST21NFCA_EVT_TRANSACTION        0x12

​

#define ST21NFCA_SE_TO_HOT_PLUG         1000

/* Connectivity pipe only */

#define ST21NFCA_SE_COUNT_PIPE_UICC     0x01

/* Connectivity + APDU Reader pipe */

#define ST21NFCA_SE_COUNT_PIPE_EMBEDDED 0x02

​

#define ST21NFCA_SE_MODE_OFF            0x00

#define ST21NFCA_SE_MODE_ON             0x01

​

#define ST21NFCA_PARAM_ATR              0x01

#define ST21NFCA_ATR_DEFAULT_BWI        0x04

​

/*

 * WT = 2^BWI/10[s], convert into msecs and add a secure

 * room by increasing by 2 this timeout

 */

#define ST21NFCA_BWI_TO_TIMEOUT(x)      ((1 << x) * 200)

#define ST21NFCA_ATR_GET_Y_FROM_TD(x)   (x >> 4)

​

/* If TA is present bit 0 is set */

#define ST21NFCA_ATR_TA_PRESENT(x) (x & 0x01)

/* If TB is present bit 1 is set */

#define ST21NFCA_ATR_TB_PRESENT(x) (x & 0x02)

​

static u8 st21nfca_se_get_bwi(struct nfc_hci_dev *hdev)

{

    int i;

    u8 td;

    struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);