// SPDX-License-Identifier: GPL-2.0+ // // Freescale i.MX7ULP LPSPI driver // // Copyright 2016 Freescale Semiconductor, Inc. // Copyright 2018 NXP Semiconductors #include <linux/clk.h> #include <linux/completion.h> #include <linux/delay.h> #include <linux/dmaengine.h> #include <linux/dma-mapping.h> #include <linux/err.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/irq.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/pinctrl/consumer.h> #include <linux/platform_device.h> #include <linux/dma/imx-dma.h> #include <linux/pm_runtime.h> #include <linux/slab.h> #include <linux/spi/spi.h> #include <linux/spi/spi_bitbang.h> #include <linux/types.h> #define DRIVER_NAME … #define FSL_LPSPI_RPM_TIMEOUT … /* The maximum bytes that edma can transfer once.*/ #define FSL_LPSPI_MAX_EDMA_BYTES … /* i.MX7ULP LPSPI registers */ #define IMX7ULP_VERID … #define IMX7ULP_PARAM … #define IMX7ULP_CR … #define IMX7ULP_SR … #define IMX7ULP_IER … #define IMX7ULP_DER … #define IMX7ULP_CFGR0 … #define IMX7ULP_CFGR1 … #define IMX7ULP_DMR0 … #define IMX7ULP_DMR1 … #define IMX7ULP_CCR … #define IMX7ULP_FCR … #define IMX7ULP_FSR … #define IMX7ULP_TCR … #define IMX7ULP_TDR … #define IMX7ULP_RSR … #define IMX7ULP_RDR … /* General control register field define */ #define CR_RRF … #define CR_RTF … #define CR_RST … #define CR_MEN … #define SR_MBF … #define SR_TCF … #define SR_FCF … #define SR_RDF … #define SR_TDF … #define IER_TCIE … #define IER_FCIE … #define IER_RDIE … #define IER_TDIE … #define DER_RDDE … #define DER_TDDE … #define CFGR1_PCSCFG … #define CFGR1_PINCFG … #define CFGR1_PCSPOL … #define CFGR1_NOSTALL … #define CFGR1_HOST … #define FSR_TXCOUNT … #define RSR_RXEMPTY … #define TCR_CPOL … #define TCR_CPHA … #define TCR_CONT … #define TCR_CONTC … #define TCR_RXMSK … #define TCR_TXMSK … struct lpspi_config { … }; struct fsl_lpspi_data { … }; static const struct of_device_id fsl_lpspi_dt_ids[] = …; MODULE_DEVICE_TABLE(of, fsl_lpspi_dt_ids); #define LPSPI_BUF_RX(type) … #define LPSPI_BUF_TX(type) … LPSPI_BUF_RX(…) LPSPI_BUF_TX(…) LPSPI_BUF_RX(…) LPSPI_BUF_TX(…) LPSPI_BUF_RX(…) LPSPI_BUF_TX(…) static void fsl_lpspi_intctrl(struct fsl_lpspi_data *fsl_lpspi, unsigned int enable) { … } static int fsl_lpspi_bytes_per_word(const int bpw) { … } static bool fsl_lpspi_can_dma(struct spi_controller *controller, struct spi_device *spi, struct spi_transfer *transfer) { … } static int lpspi_prepare_xfer_hardware(struct spi_controller *controller) { … } static int lpspi_unprepare_xfer_hardware(struct spi_controller *controller) { … } static void fsl_lpspi_write_tx_fifo(struct fsl_lpspi_data *fsl_lpspi) { … } static void fsl_lpspi_read_rx_fifo(struct fsl_lpspi_data *fsl_lpspi) { … } static void fsl_lpspi_set_cmd(struct fsl_lpspi_data *fsl_lpspi) { … } static void fsl_lpspi_set_watermark(struct fsl_lpspi_data *fsl_lpspi) { … } static int fsl_lpspi_set_bitrate(struct fsl_lpspi_data *fsl_lpspi) { … } static int fsl_lpspi_dma_configure(struct spi_controller *controller) { … } static int fsl_lpspi_config(struct fsl_lpspi_data *fsl_lpspi) { … } static int fsl_lpspi_setup_transfer(struct spi_controller *controller, struct spi_device *spi, struct spi_transfer *t) { … } static int fsl_lpspi_target_abort(struct spi_controller *controller) { … } static int fsl_lpspi_wait_for_completion(struct spi_controller *controller) { … } static int fsl_lpspi_reset(struct fsl_lpspi_data *fsl_lpspi) { … } static void fsl_lpspi_dma_rx_callback(void *cookie) { … } static void fsl_lpspi_dma_tx_callback(void *cookie) { … } static int fsl_lpspi_calculate_timeout(struct fsl_lpspi_data *fsl_lpspi, int size) { … } static int fsl_lpspi_dma_transfer(struct spi_controller *controller, struct fsl_lpspi_data *fsl_lpspi, struct spi_transfer *transfer) { … } static void fsl_lpspi_dma_exit(struct spi_controller *controller) { … } static int fsl_lpspi_dma_init(struct device *dev, struct fsl_lpspi_data *fsl_lpspi, struct spi_controller *controller) { … } static int fsl_lpspi_pio_transfer(struct spi_controller *controller, struct spi_transfer *t) { … } static int fsl_lpspi_transfer_one(struct spi_controller *controller, struct spi_device *spi, struct spi_transfer *t) { … } static irqreturn_t fsl_lpspi_isr(int irq, void *dev_id) { … } #ifdef CONFIG_PM static int fsl_lpspi_runtime_resume(struct device *dev) { … } static int fsl_lpspi_runtime_suspend(struct device *dev) { … } #endif static int fsl_lpspi_init_rpm(struct fsl_lpspi_data *fsl_lpspi) { … } static int fsl_lpspi_probe(struct platform_device *pdev) { … } static void fsl_lpspi_remove(struct platform_device *pdev) { … } static int fsl_lpspi_suspend(struct device *dev) { … } static int fsl_lpspi_resume(struct device *dev) { … } static const struct dev_pm_ops fsl_lpspi_pm_ops = …; static struct platform_driver fsl_lpspi_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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