mirror of
https://github.com/torvalds/linux.git
synced 2024-11-18 18:11:56 +00:00
cab47333f0
This driver supports STMicroelectronics NFC Transceiver "ST95HF", in in initiator role to read/write ISO14443 Type 4A, ISO14443 Type 4B and ISO15693 Type5 tags. The ST95HF datasheet is available here: http://www.st.com/web/en/resource/technical/document/datasheet/DM00102056.pdf Signed-off-by: Shikha Singh <shikha.singh@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
/*
|
||
* ---------------------------------------------------------------------------
|
||
* drivers/nfc/st95hf/spi.h functions declarations for SPI communication
|
||
* ---------------------------------------------------------------------------
|
||
* Copyright (C) 2015 STMicroelectronics – 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/>.
|
||
*/
|
||
|
||
#ifndef __LINUX_ST95HF_SPI_H
|
||
#define __LINUX_ST95HF_SPI_H
|
||
|
||
#include <linux/spi/spi.h>
|
||
|
||
/* Basic ST95HF SPI CMDs */
|
||
#define ST95HF_COMMAND_SEND 0x0
|
||
#define ST95HF_COMMAND_RESET 0x1
|
||
#define ST95HF_COMMAND_RECEIVE 0x2
|
||
|
||
#define ST95HF_RESET_CMD_LEN 0x1
|
||
|
||
/*
|
||
* structure to contain st95hf spi communication specific information.
|
||
* @req_issync: true for synchronous calls.
|
||
* @spidev: st95hf spi device object.
|
||
* @done: completion structure to wait for st95hf response
|
||
* for synchronous calls.
|
||
* @spi_lock: mutex to allow only one spi transfer at a time.
|
||
*/
|
||
struct st95hf_spi_context {
|
||
bool req_issync;
|
||
struct spi_device *spidev;
|
||
struct completion done;
|
||
struct mutex spi_lock;
|
||
};
|
||
|
||
/* flag to differentiate synchronous & asynchronous spi request */
|
||
enum req_type {
|
||
SYNC,
|
||
ASYNC,
|
||
};
|
||
|
||
int st95hf_spi_send(struct st95hf_spi_context *spicontext,
|
||
unsigned char *buffertx,
|
||
int datalen,
|
||
enum req_type reqtype);
|
||
|
||
int st95hf_spi_recv_response(struct st95hf_spi_context *spicontext,
|
||
unsigned char *receivebuff);
|
||
|
||
int st95hf_spi_recv_echo_res(struct st95hf_spi_context *spicontext,
|
||
unsigned char *receivebuff);
|
||
|
||
#endif
|