From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/nfc/st95hf/spi.h | 53 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 drivers/nfc/st95hf/spi.h (limited to 'drivers/nfc/st95hf/spi.h') diff --git a/drivers/nfc/st95hf/spi.h b/drivers/nfc/st95hf/spi.h new file mode 100644 index 000000000..3ab678734 --- /dev/null +++ b/drivers/nfc/st95hf/spi.h @@ -0,0 +1,53 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * --------------------------------------------------------------------------- + * drivers/nfc/st95hf/spi.h functions declarations for SPI communication + * --------------------------------------------------------------------------- + * Copyright (C) 2015 STMicroelectronics – All Rights Reserved + */ + +#ifndef __LINUX_ST95HF_SPI_H +#define __LINUX_ST95HF_SPI_H + +#include + +/* 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 -- cgit v1.2.3