// SPDX-License-Identifier: GPL-2.0 // Copyright (C) 2018 Spreadtrum Communications Inc. #include <linux/clk.h> #include <linux/dmaengine.h> #include <linux/dma-mapping.h> #include <linux/dma/sprd-dma.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/iopoll.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_dma.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/spi/spi.h> #define SPRD_SPI_TXD … #define SPRD_SPI_CLKD … #define SPRD_SPI_CTL0 … #define SPRD_SPI_CTL1 … #define SPRD_SPI_CTL2 … #define SPRD_SPI_CTL3 … #define SPRD_SPI_CTL4 … #define SPRD_SPI_CTL5 … #define SPRD_SPI_INT_EN … #define SPRD_SPI_INT_CLR … #define SPRD_SPI_INT_RAW_STS … #define SPRD_SPI_INT_MASK_STS … #define SPRD_SPI_STS1 … #define SPRD_SPI_STS2 … #define SPRD_SPI_DSP_WAIT … #define SPRD_SPI_STS3 … #define SPRD_SPI_CTL6 … #define SPRD_SPI_STS4 … #define SPRD_SPI_FIFO_RST … #define SPRD_SPI_CTL7 … #define SPRD_SPI_STS5 … #define SPRD_SPI_CTL8 … #define SPRD_SPI_CTL9 … #define SPRD_SPI_CTL10 … #define SPRD_SPI_CTL11 … #define SPRD_SPI_CTL12 … #define SPRD_SPI_STS6 … #define SPRD_SPI_STS7 … #define SPRD_SPI_STS8 … #define SPRD_SPI_STS9 … /* Bits & mask definition for register CTL0 */ #define SPRD_SPI_SCK_REV … #define SPRD_SPI_NG_TX … #define SPRD_SPI_NG_RX … #define SPRD_SPI_CHNL_LEN_MASK … #define SPRD_SPI_CSN_MASK … #define SPRD_SPI_CS0_VALID … /* Bits & mask definition for register SPI_INT_EN */ #define SPRD_SPI_TX_END_INT_EN … #define SPRD_SPI_RX_END_INT_EN … /* Bits & mask definition for register SPI_INT_RAW_STS */ #define SPRD_SPI_TX_END_RAW … #define SPRD_SPI_RX_END_RAW … /* Bits & mask definition for register SPI_INT_CLR */ #define SPRD_SPI_TX_END_CLR … #define SPRD_SPI_RX_END_CLR … /* Bits & mask definition for register INT_MASK_STS */ #define SPRD_SPI_MASK_RX_END … #define SPRD_SPI_MASK_TX_END … /* Bits & mask definition for register STS2 */ #define SPRD_SPI_TX_BUSY … /* Bits & mask definition for register CTL1 */ #define SPRD_SPI_RX_MODE … #define SPRD_SPI_TX_MODE … #define SPRD_SPI_RTX_MD_MASK … /* Bits & mask definition for register CTL2 */ #define SPRD_SPI_DMA_EN … /* Bits & mask definition for register CTL4 */ #define SPRD_SPI_START_RX … #define SPRD_SPI_ONLY_RECV_MASK … /* Bits & mask definition for register SPI_INT_CLR */ #define SPRD_SPI_RX_END_INT_CLR … #define SPRD_SPI_TX_END_INT_CLR … /* Bits & mask definition for register SPI_INT_RAW */ #define SPRD_SPI_RX_END_IRQ … #define SPRD_SPI_TX_END_IRQ … /* Bits & mask definition for register CTL12 */ #define SPRD_SPI_SW_RX_REQ … #define SPRD_SPI_SW_TX_REQ … /* Bits & mask definition for register CTL7 */ #define SPRD_SPI_DATA_LINE2_EN … #define SPRD_SPI_MODE_MASK … #define SPRD_SPI_MODE_OFFSET … #define SPRD_SPI_3WIRE_MODE … #define SPRD_SPI_4WIRE_MODE … /* Bits & mask definition for register CTL8 */ #define SPRD_SPI_TX_MAX_LEN_MASK … #define SPRD_SPI_TX_LEN_H_MASK … #define SPRD_SPI_TX_LEN_H_OFFSET … /* Bits & mask definition for register CTL9 */ #define SPRD_SPI_TX_LEN_L_MASK … /* Bits & mask definition for register CTL10 */ #define SPRD_SPI_RX_MAX_LEN_MASK … #define SPRD_SPI_RX_LEN_H_MASK … #define SPRD_SPI_RX_LEN_H_OFFSET … /* Bits & mask definition for register CTL11 */ #define SPRD_SPI_RX_LEN_L_MASK … /* Default & maximum word delay cycles */ #define SPRD_SPI_MIN_DELAY_CYCLE … #define SPRD_SPI_MAX_DELAY_CYCLE … #define SPRD_SPI_FIFO_SIZE … #define SPRD_SPI_CHIP_CS_NUM … #define SPRD_SPI_CHNL_LEN … #define SPRD_SPI_DEFAULT_SOURCE … #define SPRD_SPI_MAX_SPEED_HZ … #define SPRD_SPI_AUTOSUSPEND_DELAY … #define SPRD_SPI_DMA_STEP … enum sprd_spi_dma_channel { … }; struct sprd_spi_dma { … }; struct sprd_spi { … }; static u32 sprd_spi_transfer_max_timeout(struct sprd_spi *ss, struct spi_transfer *t) { … } static int sprd_spi_wait_for_tx_end(struct sprd_spi *ss, struct spi_transfer *t) { … } static int sprd_spi_wait_for_rx_end(struct sprd_spi *ss, struct spi_transfer *t) { … } static void sprd_spi_tx_req(struct sprd_spi *ss) { … } static void sprd_spi_rx_req(struct sprd_spi *ss) { … } static void sprd_spi_enter_idle(struct sprd_spi *ss) { … } static void sprd_spi_set_transfer_bits(struct sprd_spi *ss, u32 bits) { … } static void sprd_spi_set_tx_length(struct sprd_spi *ss, u32 length) { … } static void sprd_spi_set_rx_length(struct sprd_spi *ss, u32 length) { … } static void sprd_spi_chipselect(struct spi_device *sdev, bool cs) { … } static int sprd_spi_write_only_receive(struct sprd_spi *ss, u32 len) { … } static int sprd_spi_write_bufs_u8(struct sprd_spi *ss, u32 len) { … } static int sprd_spi_write_bufs_u16(struct sprd_spi *ss, u32 len) { … } static int sprd_spi_write_bufs_u32(struct sprd_spi *ss, u32 len) { … } static int sprd_spi_read_bufs_u8(struct sprd_spi *ss, u32 len) { … } static int sprd_spi_read_bufs_u16(struct sprd_spi *ss, u32 len) { … } static int sprd_spi_read_bufs_u32(struct sprd_spi *ss, u32 len) { … } static int sprd_spi_txrx_bufs(struct spi_device *sdev, struct spi_transfer *t) { … } static void sprd_spi_irq_enable(struct sprd_spi *ss) { … } static void sprd_spi_irq_disable(struct sprd_spi *ss) { … } static void sprd_spi_dma_enable(struct sprd_spi *ss, bool enable) { … } static int sprd_spi_dma_submit(struct dma_chan *dma_chan, struct dma_slave_config *c, struct sg_table *sg, enum dma_transfer_direction dir) { … } static int sprd_spi_dma_rx_config(struct sprd_spi *ss, struct spi_transfer *t) { … } static int sprd_spi_dma_tx_config(struct sprd_spi *ss, struct spi_transfer *t) { … } static int sprd_spi_dma_request(struct sprd_spi *ss) { … } static void sprd_spi_dma_release(struct sprd_spi *ss) { … } static int sprd_spi_dma_txrx_bufs(struct spi_device *sdev, struct spi_transfer *t) { … } static void sprd_spi_set_speed(struct sprd_spi *ss, u32 speed_hz) { … } static int sprd_spi_init_hw(struct sprd_spi *ss, struct spi_transfer *t) { … } static int sprd_spi_setup_transfer(struct spi_device *sdev, struct spi_transfer *t) { … } static int sprd_spi_transfer_one(struct spi_controller *sctlr, struct spi_device *sdev, struct spi_transfer *t) { … } static irqreturn_t sprd_spi_handle_irq(int irq, void *data) { … } static int sprd_spi_irq_init(struct platform_device *pdev, struct sprd_spi *ss) { … } static int sprd_spi_clk_init(struct platform_device *pdev, struct sprd_spi *ss) { … } static bool sprd_spi_can_dma(struct spi_controller *sctlr, struct spi_device *spi, struct spi_transfer *t) { … } static int sprd_spi_dma_init(struct platform_device *pdev, struct sprd_spi *ss) { … } static int sprd_spi_probe(struct platform_device *pdev) { … } static void sprd_spi_remove(struct platform_device *pdev) { … } static int __maybe_unused sprd_spi_runtime_suspend(struct device *dev) { … } static int __maybe_unused sprd_spi_runtime_resume(struct device *dev) { … } static const struct dev_pm_ops sprd_spi_pm_ops = …; static const struct of_device_id sprd_spi_of_match[] = …; MODULE_DEVICE_TABLE(of, sprd_spi_of_match); static struct platform_driver sprd_spi_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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