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53 lines
1.5 KiB
53 lines
1.5 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* --------------------------------------------------------------------------- |
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* drivers/nfc/st95hf/spi.h functions declarations for SPI communication |
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* --------------------------------------------------------------------------- |
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* Copyright (C) 2015 STMicroelectronics – All Rights Reserved |
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*/ |
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#ifndef __LINUX_ST95HF_SPI_H |
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#define __LINUX_ST95HF_SPI_H |
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#include <linux/spi/spi.h> |
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/* Basic ST95HF SPI CMDs */ |
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#define ST95HF_COMMAND_SEND 0x0 |
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#define ST95HF_COMMAND_RESET 0x1 |
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#define ST95HF_COMMAND_RECEIVE 0x2 |
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#define ST95HF_RESET_CMD_LEN 0x1 |
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/* |
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* structure to contain st95hf spi communication specific information. |
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* @req_issync: true for synchronous calls. |
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* @spidev: st95hf spi device object. |
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* @done: completion structure to wait for st95hf response |
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* for synchronous calls. |
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* @spi_lock: mutex to allow only one spi transfer at a time. |
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*/ |
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struct st95hf_spi_context { |
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bool req_issync; |
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struct spi_device *spidev; |
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struct completion done; |
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struct mutex spi_lock; |
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}; |
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/* flag to differentiate synchronous & asynchronous spi request */ |
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enum req_type { |
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SYNC, |
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ASYNC, |
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}; |
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int st95hf_spi_send(struct st95hf_spi_context *spicontext, |
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unsigned char *buffertx, |
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int datalen, |
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enum req_type reqtype); |
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int st95hf_spi_recv_response(struct st95hf_spi_context *spicontext, |
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unsigned char *receivebuff); |
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int st95hf_spi_recv_echo_res(struct st95hf_spi_context *spicontext, |
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unsigned char *receivebuff); |
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#endif
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