// SPDX-License-Identifier: GPL-2.0-only /* * Broadcom BCMBCA High Speed SPI Controller driver * * Copyright 2000-2010 Broadcom Corporation * Copyright 2012-2013 Jonas Gorski <[email protected]> * Copyright 2019-2022 Broadcom Ltd */ #include <linux/kernel.h> #include <linux/init.h> #include <linux/io.h> #include <linux/clk.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/delay.h> #include <linux/dma-mapping.h> #include <linux/err.h> #include <linux/interrupt.h> #include <linux/spi/spi.h> #include <linux/mutex.h> #include <linux/of.h> #include <linux/spi/spi-mem.h> #include <linux/pm_runtime.h> #define HSSPI_GLOBAL_CTRL_REG … #define GLOBAL_CTRL_CS_POLARITY_SHIFT … #define GLOBAL_CTRL_CS_POLARITY_MASK … #define GLOBAL_CTRL_PLL_CLK_CTRL_SHIFT … #define GLOBAL_CTRL_PLL_CLK_CTRL_MASK … #define GLOBAL_CTRL_CLK_GATE_SSOFF … #define GLOBAL_CTRL_CLK_POLARITY … #define GLOBAL_CTRL_MOSI_IDLE … #define HSSPI_GLOBAL_EXT_TRIGGER_REG … #define HSSPI_INT_STATUS_REG … #define HSSPI_INT_STATUS_MASKED_REG … #define HSSPI_INT_MASK_REG … #define HSSPI_PINGx_CMD_DONE(i) … #define HSSPI_PINGx_RX_OVER(i) … #define HSSPI_PINGx_TX_UNDER(i) … #define HSSPI_PINGx_POLL_TIMEOUT(i) … #define HSSPI_PINGx_CTRL_INVAL(i) … #define HSSPI_INT_CLEAR_ALL … #define HSSPI_PINGPONG_COMMAND_REG(x) … #define PINGPONG_CMD_COMMAND_MASK … #define PINGPONG_COMMAND_NOOP … #define PINGPONG_COMMAND_START_NOW … #define PINGPONG_COMMAND_START_TRIGGER … #define PINGPONG_COMMAND_HALT … #define PINGPONG_COMMAND_FLUSH … #define PINGPONG_CMD_PROFILE_SHIFT … #define PINGPONG_CMD_SS_SHIFT … #define HSSPI_PINGPONG_STATUS_REG(x) … #define HSSPI_PINGPONG_STATUS_SRC_BUSY … #define HSSPI_PROFILE_CLK_CTRL_REG(x) … #define CLK_CTRL_FREQ_CTRL_MASK … #define CLK_CTRL_SPI_CLK_2X_SEL … #define CLK_CTRL_ACCUM_RST_ON_LOOP … #define CLK_CTRL_CLK_POLARITY … #define HSSPI_PROFILE_SIGNAL_CTRL_REG(x) … #define SIGNAL_CTRL_LATCH_RISING … #define SIGNAL_CTRL_LAUNCH_RISING … #define SIGNAL_CTRL_ASYNC_INPUT_PATH … #define HSSPI_PROFILE_MODE_CTRL_REG(x) … #define MODE_CTRL_MULTIDATA_RD_STRT_SHIFT … #define MODE_CTRL_MULTIDATA_WR_STRT_SHIFT … #define MODE_CTRL_MULTIDATA_RD_SIZE_SHIFT … #define MODE_CTRL_MULTIDATA_WR_SIZE_SHIFT … #define MODE_CTRL_MODE_3WIRE … #define MODE_CTRL_PREPENDBYTE_CNT_SHIFT … #define HSSPI_FIFO_REG(x) … #define HSSPI_OP_MULTIBIT … #define HSSPI_OP_CODE_SHIFT … #define HSSPI_OP_SLEEP … #define HSSPI_OP_READ_WRITE … #define HSSPI_OP_WRITE … #define HSSPI_OP_READ … #define HSSPI_OP_SETIRQ … #define HSSPI_BUFFER_LEN … #define HSSPI_OPCODE_LEN … #define HSSPI_MAX_PREPEND_LEN … #define HSSPI_MAX_SYNC_CLOCK … #define HSSPI_SPI_MAX_CS … #define HSSPI_BUS_NUM … #define HSSPI_POLL_STATUS_TIMEOUT_MS … #define HSSPI_WAIT_MODE_POLLING … #define HSSPI_WAIT_MODE_INTR … #define HSSPI_WAIT_MODE_MAX … #define SPIM_CTRL_CS_OVERRIDE_SEL_SHIFT … #define SPIM_CTRL_CS_OVERRIDE_SEL_MASK … #define SPIM_CTRL_CS_OVERRIDE_VAL_SHIFT … #define SPIM_CTRL_CS_OVERRIDE_VAL_MASK … struct bcmbca_hsspi { … }; static ssize_t wait_mode_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t wait_mode_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_RW(wait_mode); static struct attribute *bcmbca_hsspi_attrs[] = …; static const struct attribute_group bcmbca_hsspi_group = …; static void bcmbca_hsspi_set_cs(struct bcmbca_hsspi *bs, unsigned int cs, bool active) { … } static void bcmbca_hsspi_set_clk(struct bcmbca_hsspi *bs, struct spi_device *spi, int hz) { … } static int bcmbca_hsspi_wait_cmd(struct bcmbca_hsspi *bs, unsigned int cs) { … } static int bcmbca_hsspi_do_txrx(struct spi_device *spi, struct spi_transfer *t, struct spi_message *msg) { … } static int bcmbca_hsspi_setup(struct spi_device *spi) { … } static int bcmbca_hsspi_transfer_one(struct spi_controller *host, struct spi_message *msg) { … } static irqreturn_t bcmbca_hsspi_interrupt(int irq, void *dev_id) { … } static int bcmbca_hsspi_probe(struct platform_device *pdev) { … } static void bcmbca_hsspi_remove(struct platform_device *pdev) { … } #ifdef CONFIG_PM_SLEEP static int bcmbca_hsspi_suspend(struct device *dev) { … } static int bcmbca_hsspi_resume(struct device *dev) { … } #endif static SIMPLE_DEV_PM_OPS(bcmbca_hsspi_pm_ops, bcmbca_hsspi_suspend, bcmbca_hsspi_resume); static const struct of_device_id bcmbca_hsspi_of_match[] = …; MODULE_DEVICE_TABLE(of, bcmbca_hsspi_of_match); static struct platform_driver bcmbca_hsspi_driver = …; module_platform_driver(…) …; MODULE_ALIAS(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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