/* * Copyright (C) 2017 Spreadtrum Communications Inc. * * SPDX-License-Identifier: (GPL-2.0+ OR MIT) */ #include <linux/clk.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/io.h> #include <linux/i2c.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #define I2C_CTL … #define I2C_ADDR_CFG … #define I2C_COUNT … #define I2C_RX … #define I2C_TX … #define I2C_STATUS … #define I2C_HSMODE_CFG … #define I2C_VERSION … #define ADDR_DVD0 … #define ADDR_DVD1 … #define ADDR_STA0_DVD … #define ADDR_RST … /* I2C_CTL */ #define STP_EN … #define FIFO_AF_LVL_MASK … #define FIFO_AF_LVL … #define FIFO_AE_LVL_MASK … #define FIFO_AE_LVL … #define I2C_DMA_EN … #define FULL_INTEN … #define EMPTY_INTEN … #define I2C_DVD_OPT … #define I2C_OUT_OPT … #define I2C_TRIM_OPT … #define I2C_HS_MODE … #define I2C_MODE … #define I2C_EN … #define I2C_INT_EN … #define I2C_START … /* I2C_STATUS */ #define SDA_IN … #define SCL_IN … #define FIFO_FULL … #define FIFO_EMPTY … #define I2C_INT … #define I2C_RX_ACK … #define I2C_BUSY … /* ADDR_RST */ #define I2C_RST … #define I2C_FIFO_DEEP … #define I2C_FIFO_FULL_THLD … #define I2C_FIFO_EMPTY_THLD … #define I2C_DATA_STEP … #define I2C_ADDR_DVD0_CALC(high, low) … #define I2C_ADDR_DVD1_CALC(high, low) … /* timeout (ms) for pm runtime autosuspend */ #define SPRD_I2C_PM_TIMEOUT … /* timeout (ms) for transfer message */ #define I2C_XFER_TIMEOUT … /* SPRD i2c data structure */ struct sprd_i2c { … }; static void sprd_i2c_set_count(struct sprd_i2c *i2c_dev, u32 count) { … } static void sprd_i2c_send_stop(struct sprd_i2c *i2c_dev, int stop) { … } static void sprd_i2c_clear_start(struct sprd_i2c *i2c_dev) { … } static void sprd_i2c_clear_ack(struct sprd_i2c *i2c_dev) { … } static void sprd_i2c_clear_irq(struct sprd_i2c *i2c_dev) { … } static void sprd_i2c_reset_fifo(struct sprd_i2c *i2c_dev) { … } static void sprd_i2c_set_devaddr(struct sprd_i2c *i2c_dev, struct i2c_msg *m) { … } static void sprd_i2c_write_bytes(struct sprd_i2c *i2c_dev, u8 *buf, u32 len) { … } static void sprd_i2c_read_bytes(struct sprd_i2c *i2c_dev, u8 *buf, u32 len) { … } static void sprd_i2c_set_full_thld(struct sprd_i2c *i2c_dev, u32 full_thld) { u32 tmp = readl(i2c_dev->base + I2C_CTL); tmp &= ~FIFO_AF_LVL_MASK; tmp |= full_thld << FIFO_AF_LVL; writel(tmp, i2c_dev->base + I2C_CTL); }; static void sprd_i2c_set_empty_thld(struct sprd_i2c *i2c_dev, u32 empty_thld) { u32 tmp = readl(i2c_dev->base + I2C_CTL); tmp &= ~FIFO_AE_LVL_MASK; tmp |= empty_thld << FIFO_AE_LVL; writel(tmp, i2c_dev->base + I2C_CTL); }; static void sprd_i2c_set_fifo_full_int(struct sprd_i2c *i2c_dev, int enable) { u32 tmp = readl(i2c_dev->base + I2C_CTL); if (enable) tmp |= FULL_INTEN; else tmp &= ~FULL_INTEN; writel(tmp, i2c_dev->base + I2C_CTL); }; static void sprd_i2c_set_fifo_empty_int(struct sprd_i2c *i2c_dev, int enable) { u32 tmp = readl(i2c_dev->base + I2C_CTL); if (enable) tmp |= EMPTY_INTEN; else tmp &= ~EMPTY_INTEN; writel(tmp, i2c_dev->base + I2C_CTL); }; static void sprd_i2c_opt_start(struct sprd_i2c *i2c_dev) { … } static void sprd_i2c_opt_mode(struct sprd_i2c *i2c_dev, int rw) { … } static void sprd_i2c_data_transfer(struct sprd_i2c *i2c_dev) { … } static int sprd_i2c_handle_msg(struct i2c_adapter *i2c_adap, struct i2c_msg *msg, bool is_last_msg) { … } static int sprd_i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num) { … } static u32 sprd_i2c_func(struct i2c_adapter *adap) { … } static const struct i2c_algorithm sprd_i2c_algo = …; static void sprd_i2c_set_clk(struct sprd_i2c *i2c_dev, u32 freq) { … } static void sprd_i2c_enable(struct sprd_i2c *i2c_dev) { … } static irqreturn_t sprd_i2c_isr_thread(int irq, void *dev_id) { … } static irqreturn_t sprd_i2c_isr(int irq, void *dev_id) { … } static int sprd_i2c_clk_init(struct sprd_i2c *i2c_dev) { … } static int sprd_i2c_probe(struct platform_device *pdev) { … } static void sprd_i2c_remove(struct platform_device *pdev) { … } static int __maybe_unused sprd_i2c_suspend_noirq(struct device *dev) { … } static int __maybe_unused sprd_i2c_resume_noirq(struct device *dev) { … } static int __maybe_unused sprd_i2c_runtime_suspend(struct device *dev) { … } static int __maybe_unused sprd_i2c_runtime_resume(struct device *dev) { … } static const struct dev_pm_ops sprd_i2c_pm_ops = …; static const struct of_device_id sprd_i2c_of_match[] = …; MODULE_DEVICE_TABLE(of, sprd_i2c_of_match); static struct platform_driver sprd_i2c_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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