1 files changed, 53 insertions, 0 deletions
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 <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