spi-ingenic.c | Explore in Territory

// SPDX-License-Identifier: GPL-2.0
/*
 * SPI bus driver for the Ingenic SoCs
 * Copyright (c) 2017-2021 Artur Rojek <[email protected]>
 * Copyright (c) 2017-2021 Paul Cercueil <[email protected]>
 * Copyright (c) 2022 周琰杰 (Zhou Yanjie) <[email protected]>
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>
#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/spi/spi.h>
#include "internals.h"

#define REG_SSIDR …
#define REG_SSICR0 …
#define REG_SSICR1 …
#define REG_SSISR …
#define REG_SSIGR …

#define REG_SSICR0_TENDIAN_LSB …
#define REG_SSICR0_RENDIAN_LSB …
#define REG_SSICR0_SSIE …
#define REG_SSICR0_LOOP …
#define REG_SSICR0_EACLRUN …
#define REG_SSICR0_FSEL …
#define REG_SSICR0_TFLUSH …
#define REG_SSICR0_RFLUSH …

#define REG_SSICR1_FRMHL_MASK …
#define REG_SSICR1_FRMHL …
#define REG_SSICR1_LFST …
#define REG_SSICR1_UNFIN …
#define REG_SSICR1_PHA …
#define REG_SSICR1_POL …

#define REG_SSISR_END …
#define REG_SSISR_BUSY …
#define REG_SSISR_TFF …
#define REG_SSISR_RFE …
#define REG_SSISR_RFHF …
#define REG_SSISR_UNDR …
#define REG_SSISR_OVER …

#define SPI_INGENIC_FIFO_SIZE …

struct jz_soc_info { … };

struct ingenic_spi { … };

static int spi_ingenic_wait(struct ingenic_spi *priv,
			    unsigned long mask,
			    bool condition)
{ … }

static void spi_ingenic_set_cs(struct spi_device *spi, bool disable)
{ … }

static void spi_ingenic_prepare_transfer(struct ingenic_spi *priv,
					 struct spi_device *spi,
					 struct spi_transfer *xfer)
{ … }

static void spi_ingenic_finalize_transfer(void *controller)
{ … }

static struct dma_async_tx_descriptor *
spi_ingenic_prepare_dma(struct spi_controller *ctlr, struct dma_chan *chan,
			struct sg_table *sg, enum dma_transfer_direction dir,
			unsigned int bits)
{ … }

static int spi_ingenic_dma_tx(struct spi_controller *ctlr,
			      struct spi_transfer *xfer, unsigned int bits)
{ … }

#define SPI_INGENIC_TX …
SPI_INGENIC_TX(8)
SPI_INGENIC_TX(16)
SPI_INGENIC_TX(32)
#undef SPI_INGENIC_TX

static int spi_ingenic_transfer_one(struct spi_controller *ctlr,
				    struct spi_device *spi,
				    struct spi_transfer *xfer)
{ … }

static int spi_ingenic_prepare_message(struct spi_controller *ctlr,
				       struct spi_message *message)
{ … }

static int spi_ingenic_prepare_hardware(struct spi_controller *ctlr)
{ … }

static int spi_ingenic_unprepare_hardware(struct spi_controller *ctlr)
{ … }

static bool spi_ingenic_can_dma(struct spi_controller *ctlr,
				struct spi_device *spi,
				struct spi_transfer *xfer)
{ … }

static int spi_ingenic_request_dma(struct spi_controller *ctlr,
				   struct device *dev)
{ … }

static void spi_ingenic_release_dma(void *data)
{ … }

static const struct regmap_config spi_ingenic_regmap_config = …;

static int spi_ingenic_probe(struct platform_device *pdev)
{ … }

static const struct jz_soc_info jz4750_soc_info = …;

static const struct jz_soc_info jz4780_soc_info = …;

static const struct jz_soc_info x1000_soc_info = …;

static const struct jz_soc_info x2000_soc_info = …;

static const struct of_device_id spi_ingenic_of_match[] = …;
MODULE_DEVICE_TABLE(of, spi_ingenic_of_match);

static struct platform_driver spi_ingenic_driver = …;

module_platform_driver(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_AUTHOR(…) …;
MODULE_AUTHOR(…) …;
MODULE_AUTHOR(…) …;
MODULE_LICENSE(…) …;
linux/drivers/spi/spi-ingenic.c
