// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2012 FUJITSU SEMICONDUCTOR LIMITED */ #include <linux/acpi.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/err.h> #include <linux/errno.h> #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/spinlock.h> #define WAIT_PCLK(n, rate) … /* I2C register address definitions */ #define SYNQUACER_I2C_REG_BSR … #define SYNQUACER_I2C_REG_BCR … #define SYNQUACER_I2C_REG_CCR … #define SYNQUACER_I2C_REG_ADR … #define SYNQUACER_I2C_REG_DAR … #define SYNQUACER_I2C_REG_CSR … #define SYNQUACER_I2C_REG_FSR … #define SYNQUACER_I2C_REG_BC2R … /* I2C register bit definitions */ #define SYNQUACER_I2C_BSR_FBT … #define SYNQUACER_I2C_BSR_GCA … #define SYNQUACER_I2C_BSR_AAS … #define SYNQUACER_I2C_BSR_TRX … #define SYNQUACER_I2C_BSR_LRB … #define SYNQUACER_I2C_BSR_AL … #define SYNQUACER_I2C_BSR_RSC … #define SYNQUACER_I2C_BSR_BB … #define SYNQUACER_I2C_BCR_INT … #define SYNQUACER_I2C_BCR_INTE … #define SYNQUACER_I2C_BCR_GCAA … #define SYNQUACER_I2C_BCR_ACK … #define SYNQUACER_I2C_BCR_MSS … #define SYNQUACER_I2C_BCR_SCC … #define SYNQUACER_I2C_BCR_BEIE … #define SYNQUACER_I2C_BCR_BER … #define SYNQUACER_I2C_CCR_CS_MASK … #define SYNQUACER_I2C_CCR_EN … #define SYNQUACER_I2C_CCR_FM … #define SYNQUACER_I2C_CSR_CS_MASK … #define SYNQUACER_I2C_BC2R_SCLL … #define SYNQUACER_I2C_BC2R_SDAL … #define SYNQUACER_I2C_BC2R_SCLS … #define SYNQUACER_I2C_BC2R_SDAS … /* PCLK frequency */ #define SYNQUACER_I2C_BUS_CLK_FR(rate) … /* STANDARD MODE frequency */ #define SYNQUACER_I2C_CLK_MASTER_STD(rate) … /* FAST MODE frequency */ #define SYNQUACER_I2C_CLK_MASTER_FAST(rate) … /* (clkrate <= 18000000) */ /* calculate the value of CS bits in CCR register on standard mode */ #define SYNQUACER_I2C_CCR_CS_STD_MAX_18M(rate) … /* calculate the value of CS bits in CSR register on standard mode */ #define SYNQUACER_I2C_CSR_CS_STD_MAX_18M(rate) … /* calculate the value of CS bits in CCR register on fast mode */ #define SYNQUACER_I2C_CCR_CS_FAST_MAX_18M(rate) … /* calculate the value of CS bits in CSR register on fast mode */ #define SYNQUACER_I2C_CSR_CS_FAST_MAX_18M(rate) … /* (clkrate > 18000000) */ /* calculate the value of CS bits in CCR register on standard mode */ #define SYNQUACER_I2C_CCR_CS_STD_MIN_18M(rate) … /* calculate the value of CS bits in CSR register on standard mode */ #define SYNQUACER_I2C_CSR_CS_STD_MIN_18M(rate) … /* calculate the value of CS bits in CCR register on fast mode */ #define SYNQUACER_I2C_CCR_CS_FAST_MIN_18M(rate) … /* calculate the value of CS bits in CSR register on fast mode */ #define SYNQUACER_I2C_CSR_CS_FAST_MIN_18M(rate) … /* min I2C clock frequency 14M */ #define SYNQUACER_I2C_MIN_CLK_RATE … /* max I2C clock frequency 200M */ #define SYNQUACER_I2C_MAX_CLK_RATE … /* I2C clock frequency 18M */ #define SYNQUACER_I2C_CLK_RATE_18M … #define SYNQUACER_I2C_SPEED_FM … #define SYNQUACER_I2C_SPEED_SM … enum i2c_state { … }; struct synquacer_i2c { … }; static inline int is_lastmsg(struct synquacer_i2c *i2c) { … } static inline int is_msglast(struct synquacer_i2c *i2c) { … } static inline int is_msgend(struct synquacer_i2c *i2c) { … } static inline unsigned long calc_timeout_ms(struct synquacer_i2c *i2c, struct i2c_msg *msgs, int num) { … } static void synquacer_i2c_stop(struct synquacer_i2c *i2c, int ret) { … } static void synquacer_i2c_hw_init(struct synquacer_i2c *i2c) { … } static void synquacer_i2c_hw_reset(struct synquacer_i2c *i2c) { … } static int synquacer_i2c_master_start(struct synquacer_i2c *i2c, struct i2c_msg *pmsg) { … } static int synquacer_i2c_doxfer(struct synquacer_i2c *i2c, struct i2c_msg *msgs, int num) { … } static irqreturn_t synquacer_i2c_isr(int irq, void *dev_id) { … } static int synquacer_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) { … } static u32 synquacer_i2c_functionality(struct i2c_adapter *adap) { … } static const struct i2c_algorithm synquacer_i2c_algo = …; static const struct i2c_adapter synquacer_i2c_ops = …; static int synquacer_i2c_probe(struct platform_device *pdev) { … } static void synquacer_i2c_remove(struct platform_device *pdev) { struct synquacer_i2c *i2c = platform_get_drvdata(pdev); i2c_del_adapter(&i2c->adapter); }; static const struct of_device_id synquacer_i2c_dt_ids[] __maybe_unused = …; MODULE_DEVICE_TABLE(of, synquacer_i2c_dt_ids); #ifdef CONFIG_ACPI static const struct acpi_device_id synquacer_i2c_acpi_ids[] = …; MODULE_DEVICE_TABLE(acpi, synquacer_i2c_acpi_ids); #endif static struct platform_driver synquacer_i2c_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
Codebase Browser
linux