// SPDX-License-Identifier: GPL-2.0-or-later /* * Actions Semiconductor Owl SoC's I2C driver * * Copyright (c) 2014 Actions Semi Inc. * Author: David Liu <[email protected]> * * Copyright (c) 2018 Linaro Ltd. * Author: Manivannan Sadhasivam <[email protected]> */ #include <linux/clk.h> #include <linux/delay.h> #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/iopoll.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> /* I2C registers */ #define OWL_I2C_REG_CTL … #define OWL_I2C_REG_CLKDIV … #define OWL_I2C_REG_STAT … #define OWL_I2C_REG_ADDR … #define OWL_I2C_REG_TXDAT … #define OWL_I2C_REG_RXDAT … #define OWL_I2C_REG_CMD … #define OWL_I2C_REG_FIFOCTL … #define OWL_I2C_REG_FIFOSTAT … #define OWL_I2C_REG_DATCNT … #define OWL_I2C_REG_RCNT … /* I2Cx_CTL Bit Mask */ #define OWL_I2C_CTL_RB … #define OWL_I2C_CTL_GBCC(x) … #define OWL_I2C_CTL_GBCC_NONE … #define OWL_I2C_CTL_GBCC_START … #define OWL_I2C_CTL_GBCC_STOP … #define OWL_I2C_CTL_GBCC_RSTART … #define OWL_I2C_CTL_IRQE … #define OWL_I2C_CTL_EN … #define OWL_I2C_CTL_AE … #define OWL_I2C_CTL_SHSM … #define OWL_I2C_DIV_FACTOR(x) … /* I2Cx_STAT Bit Mask */ #define OWL_I2C_STAT_RACK … #define OWL_I2C_STAT_BEB … #define OWL_I2C_STAT_IRQP … #define OWL_I2C_STAT_LAB … #define OWL_I2C_STAT_STPD … #define OWL_I2C_STAT_STAD … #define OWL_I2C_STAT_BBB … #define OWL_I2C_STAT_TCB … #define OWL_I2C_STAT_LBST … #define OWL_I2C_STAT_SAMB … #define OWL_I2C_STAT_SRGC … /* I2Cx_CMD Bit Mask */ #define OWL_I2C_CMD_SBE … #define OWL_I2C_CMD_RBE … #define OWL_I2C_CMD_DE … #define OWL_I2C_CMD_NS … #define OWL_I2C_CMD_SE … #define OWL_I2C_CMD_MSS … #define OWL_I2C_CMD_WRS … #define OWL_I2C_CMD_SECL … #define OWL_I2C_CMD_AS(x) … #define OWL_I2C_CMD_SAS(x) … /* I2Cx_FIFOCTL Bit Mask */ #define OWL_I2C_FIFOCTL_NIB … #define OWL_I2C_FIFOCTL_RFR … #define OWL_I2C_FIFOCTL_TFR … /* I2Cc_FIFOSTAT Bit Mask */ #define OWL_I2C_FIFOSTAT_CECB … #define OWL_I2C_FIFOSTAT_RNB … #define OWL_I2C_FIFOSTAT_RFE … #define OWL_I2C_FIFOSTAT_TFF … #define OWL_I2C_FIFOSTAT_TFD … #define OWL_I2C_FIFOSTAT_RFD … /* I2C bus timeout */ #define OWL_I2C_TIMEOUT_MS … #define OWL_I2C_TIMEOUT … #define OWL_I2C_MAX_RETRIES … struct owl_i2c_dev { … }; static void owl_i2c_update_reg(void __iomem *reg, unsigned int val, bool state) { … } static void owl_i2c_reset(struct owl_i2c_dev *i2c_dev) { … } static int owl_i2c_reset_fifo(struct owl_i2c_dev *i2c_dev) { … } static void owl_i2c_set_freq(struct owl_i2c_dev *i2c_dev) { … } static void owl_i2c_xfer_data(struct owl_i2c_dev *i2c_dev) { … } static irqreturn_t owl_i2c_interrupt(int irq, void *_dev) { … } static u32 owl_i2c_func(struct i2c_adapter *adap) { … } static int owl_i2c_check_bus_busy(struct i2c_adapter *adap) { … } static int owl_i2c_xfer_common(struct i2c_adapter *adap, struct i2c_msg *msgs, int num, bool atomic) { … } static int owl_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) { … } static int owl_i2c_xfer_atomic(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) { … } static const struct i2c_algorithm owl_i2c_algorithm = …; static const struct i2c_adapter_quirks owl_i2c_quirks = …; static int owl_i2c_probe(struct platform_device *pdev) { … } static const struct of_device_id owl_i2c_of_match[] = …; MODULE_DEVICE_TABLE(of, owl_i2c_of_match); static struct platform_driver owl_i2c_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
Codebase Browser
linux