// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2003-2015 Broadcom Corporation * All Rights Reserved */ #include <linux/acpi.h> #include <linux/clk.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/spi/spi.h> #include <linux/interrupt.h> /* SPI Configuration Register */ #define XLP_SPI_CONFIG … #define XLP_SPI_CPHA … #define XLP_SPI_CPOL … #define XLP_SPI_CS_POL … #define XLP_SPI_TXMISO_EN … #define XLP_SPI_TXMOSI_EN … #define XLP_SPI_RXMISO_EN … #define XLP_SPI_CS_LSBFE … #define XLP_SPI_RXCAP_EN … /* SPI Frequency Divider Register */ #define XLP_SPI_FDIV … /* SPI Command Register */ #define XLP_SPI_CMD … #define XLP_SPI_CMD_IDLE_MASK … #define XLP_SPI_CMD_TX_MASK … #define XLP_SPI_CMD_RX_MASK … #define XLP_SPI_CMD_TXRX_MASK … #define XLP_SPI_CMD_CONT … #define XLP_SPI_XFR_BITCNT_SHIFT … /* SPI Status Register */ #define XLP_SPI_STATUS … #define XLP_SPI_XFR_PENDING … #define XLP_SPI_XFR_DONE … #define XLP_SPI_TX_INT … #define XLP_SPI_RX_INT … #define XLP_SPI_TX_UF … #define XLP_SPI_RX_OF … #define XLP_SPI_STAT_MASK … /* SPI Interrupt Enable Register */ #define XLP_SPI_INTR_EN … #define XLP_SPI_INTR_DONE … #define XLP_SPI_INTR_TXTH … #define XLP_SPI_INTR_RXTH … #define XLP_SPI_INTR_TXUF … #define XLP_SPI_INTR_RXOF … /* SPI FIFO Threshold Register */ #define XLP_SPI_FIFO_THRESH … /* SPI FIFO Word Count Register */ #define XLP_SPI_FIFO_WCNT … #define XLP_SPI_RXFIFO_WCNT_MASK … #define XLP_SPI_TXFIFO_WCNT_MASK … #define XLP_SPI_TXFIFO_WCNT_SHIFT … /* SPI Transmit Data FIFO Register */ #define XLP_SPI_TXDATA_FIFO … /* SPI Receive Data FIFO Register */ #define XLP_SPI_RXDATA_FIFO … /* SPI System Control Register */ #define XLP_SPI_SYSCTRL … #define XLP_SPI_SYS_RESET … #define XLP_SPI_SYS_CLKDIS … #define XLP_SPI_SYS_PMEN … #define SPI_CS_OFFSET … #define XLP_SPI_TXRXTH … #define XLP_SPI_FIFO_SIZE … #define XLP_SPI_MAX_CS … #define XLP_SPI_DEFAULT_FREQ … #define XLP_SPI_FDIV_MIN … #define XLP_SPI_FDIV_MAX … /* * SPI can transfer only 28 bytes properly at a time. So split the * transfer into 28 bytes size. */ #define XLP_SPI_XFER_SIZE … struct xlp_spi_priv { … }; static inline u32 xlp_spi_reg_read(struct xlp_spi_priv *priv, int cs, int regoff) { … } static inline void xlp_spi_reg_write(struct xlp_spi_priv *priv, int cs, int regoff, u32 val) { … } static inline void xlp_spi_sysctl_write(struct xlp_spi_priv *priv, int regoff, u32 val) { … } /* * Setup global SPI_SYSCTRL register for all SPI channels. */ static void xlp_spi_sysctl_setup(struct xlp_spi_priv *xspi) { … } static int xlp_spi_setup(struct spi_device *spi) { … } static void xlp_spi_read_rxfifo(struct xlp_spi_priv *xspi) { … } static void xlp_spi_fill_txfifo(struct xlp_spi_priv *xspi) { … } static irqreturn_t xlp_spi_interrupt(int irq, void *dev_id) { … } static void xlp_spi_send_cmd(struct xlp_spi_priv *xspi, int xfer_len, int cmd_cont) { … } static int xlp_spi_xfer_block(struct xlp_spi_priv *xs, const unsigned char *tx_buf, unsigned char *rx_buf, int xfer_len, int cmd_cont) { … } static int xlp_spi_txrx_bufs(struct xlp_spi_priv *xs, struct spi_transfer *t) { … } static int xlp_spi_transfer_one(struct spi_controller *host, struct spi_device *spi, struct spi_transfer *t) { … } static int xlp_spi_probe(struct platform_device *pdev) { … } #ifdef CONFIG_ACPI static const struct acpi_device_id xlp_spi_acpi_match[] = …; MODULE_DEVICE_TABLE(acpi, xlp_spi_acpi_match); #endif static struct platform_driver xlp_spi_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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