// SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2017-2018, The Linux foundation. All rights reserved. #include <linux/clk.h> #include <linux/dmaengine.h> #include <linux/dma-mapping.h> #include <linux/dma/qcom-gpi-dma.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/log2.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/pm_opp.h> #include <linux/pm_runtime.h> #include <linux/property.h> #include <linux/soc/qcom/geni-se.h> #include <linux/spi/spi.h> #include <linux/spinlock.h> /* SPI SE specific registers and respective register fields */ #define SE_SPI_CPHA … #define CPHA … #define SE_SPI_LOOPBACK … #define LOOPBACK_ENABLE … #define NORMAL_MODE … #define LOOPBACK_MSK … #define SE_SPI_CPOL … #define CPOL … #define SE_SPI_DEMUX_OUTPUT_INV … #define CS_DEMUX_OUTPUT_INV_MSK … #define SE_SPI_DEMUX_SEL … #define CS_DEMUX_OUTPUT_SEL … #define SE_SPI_TRANS_CFG … #define CS_TOGGLE … #define SE_SPI_WORD_LEN … #define WORD_LEN_MSK … #define MIN_WORD_LEN … #define SE_SPI_TX_TRANS_LEN … #define SE_SPI_RX_TRANS_LEN … #define TRANS_LEN_MSK … #define SE_SPI_PRE_POST_CMD_DLY … #define SE_SPI_DELAY_COUNTERS … #define SPI_INTER_WORDS_DELAY_MSK … #define SPI_CS_CLK_DELAY_MSK … #define SPI_CS_CLK_DELAY_SHFT … #define SE_SPI_SLAVE_EN … #define SPI_SLAVE_EN … /* M_CMD OP codes for SPI */ #define SPI_TX_ONLY … #define SPI_RX_ONLY … #define SPI_TX_RX … #define SPI_CS_ASSERT … #define SPI_CS_DEASSERT … #define SPI_SCK_ONLY … /* M_CMD params for SPI */ #define SPI_PRE_CMD_DELAY … #define TIMESTAMP_BEFORE … #define FRAGMENTATION … #define TIMESTAMP_AFTER … #define POST_CMD_DELAY … #define GSI_LOOPBACK_EN … #define GSI_CS_TOGGLE … #define GSI_CPHA … #define GSI_CPOL … struct spi_geni_master { … }; static void spi_slv_setup(struct spi_geni_master *mas) { … } static int get_spi_clk_cfg(unsigned int speed_hz, struct spi_geni_master *mas, unsigned int *clk_idx, unsigned int *clk_div) { … } static void handle_se_timeout(struct spi_controller *spi, struct spi_message *msg) { … } static void handle_gpi_timeout(struct spi_controller *spi, struct spi_message *msg) { … } static void spi_geni_handle_err(struct spi_controller *spi, struct spi_message *msg) { … } static bool spi_geni_is_abort_still_pending(struct spi_geni_master *mas) { … } static void spi_geni_set_cs(struct spi_device *slv, bool set_flag) { … } static void spi_setup_word_len(struct spi_geni_master *mas, u16 mode, unsigned int bits_per_word) { … } static int geni_spi_set_clock_and_bw(struct spi_geni_master *mas, unsigned long clk_hz) { … } static int setup_fifo_params(struct spi_device *spi_slv, struct spi_controller *spi) { … } static void spi_gsi_callback_result(void *cb, const struct dmaengine_result *result) { … } static int setup_gsi_xfer(struct spi_transfer *xfer, struct spi_geni_master *mas, struct spi_device *spi_slv, struct spi_controller *spi) { … } static u32 get_xfer_len_in_words(struct spi_transfer *xfer, struct spi_geni_master *mas) { … } static bool geni_can_dma(struct spi_controller *ctlr, struct spi_device *slv, struct spi_transfer *xfer) { … } static int spi_geni_prepare_message(struct spi_controller *spi, struct spi_message *spi_msg) { … } static void spi_geni_release_dma_chan(void *data) { … } static int spi_geni_grab_gpi_chan(struct spi_geni_master *mas) { … } static int spi_geni_init(struct spi_geni_master *mas) { … } static unsigned int geni_byte_per_fifo_word(struct spi_geni_master *mas) { … } static bool geni_spi_handle_tx(struct spi_geni_master *mas) { … } static void geni_spi_handle_rx(struct spi_geni_master *mas) { … } static int setup_se_xfer(struct spi_transfer *xfer, struct spi_geni_master *mas, u16 mode, struct spi_controller *spi) { … } static int spi_geni_transfer_one(struct spi_controller *spi, struct spi_device *slv, struct spi_transfer *xfer) { … } static irqreturn_t geni_spi_isr(int irq, void *data) { … } static int spi_geni_probe(struct platform_device *pdev) { … } static int __maybe_unused spi_geni_runtime_suspend(struct device *dev) { … } static int __maybe_unused spi_geni_runtime_resume(struct device *dev) { … } static int __maybe_unused spi_geni_suspend(struct device *dev) { … } static int __maybe_unused spi_geni_resume(struct device *dev) { … } static const struct dev_pm_ops spi_geni_pm_ops = …; static const struct of_device_id spi_geni_dt_match[] = …; MODULE_DEVICE_TABLE(of, spi_geni_dt_match); static struct platform_driver spi_geni_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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