// SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2017-2018, The Linux Foundation. All rights reserved. #include <linux/acpi.h> #include <linux/clk.h> #include <linux/dmaengine.h> #include <linux/dma-mapping.h> #include <linux/dma/qcom-gpi-dma.h> #include <linux/err.h> #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/soc/qcom/geni-se.h> #include <linux/spinlock.h> #define SE_I2C_TX_TRANS_LEN … #define SE_I2C_RX_TRANS_LEN … #define SE_I2C_SCL_COUNTERS … #define SE_I2C_ERR … #define SE_I2C_ABORT … /* M_CMD OP codes for I2C */ #define I2C_WRITE … #define I2C_READ … #define I2C_WRITE_READ … #define I2C_ADDR_ONLY … #define I2C_BUS_CLEAR … #define I2C_STOP_ON_BUS … /* M_CMD params for I2C */ #define PRE_CMD_DELAY … #define TIMESTAMP_BEFORE … #define STOP_STRETCH … #define TIMESTAMP_AFTER … #define POST_COMMAND_DELAY … #define IGNORE_ADD_NACK … #define READ_FINISHED_WITH_ACK … #define BYPASS_ADDR_PHASE … #define SLV_ADDR_MSK … #define SLV_ADDR_SHFT … /* I2C SCL COUNTER fields */ #define HIGH_COUNTER_MSK … #define HIGH_COUNTER_SHFT … #define LOW_COUNTER_MSK … #define LOW_COUNTER_SHFT … #define CYCLE_COUNTER_MSK … #define I2C_PACK_TX … #define I2C_PACK_RX … enum geni_i2c_err_code { … }; #define DM_I2C_CB_ERR … #define I2C_AUTO_SUSPEND_DELAY … #define KHZ(freq) … #define PACKING_BYTES_PW … #define ABORT_TIMEOUT … #define XFER_TIMEOUT … #define RST_TIMEOUT … struct geni_i2c_dev { … }; struct geni_i2c_desc { … }; struct geni_i2c_err_log { … }; static const struct geni_i2c_err_log gi2c_log[] = …; struct geni_i2c_clk_fld { … }; /* * Hardware uses the underlying formula to calculate time periods of * SCL clock cycle. Firmware uses some additional cycles excluded from the * below formula and it is confirmed that the time periods are within * specification limits. * * time of high period of SCL: t_high = (t_high_cnt * clk_div) / source_clock * time of low period of SCL: t_low = (t_low_cnt * clk_div) / source_clock * time of full period of SCL: t_cycle = (t_cycle_cnt * clk_div) / source_clock * clk_freq_out = t / t_cycle * source_clock = 19.2 MHz */ static const struct geni_i2c_clk_fld geni_i2c_clk_map[] = …; static int geni_i2c_clk_map_idx(struct geni_i2c_dev *gi2c) { … } static void qcom_geni_i2c_conf(struct geni_i2c_dev *gi2c) { … } static void geni_i2c_err_misc(struct geni_i2c_dev *gi2c) { … } static void geni_i2c_err(struct geni_i2c_dev *gi2c, int err) { … } static irqreturn_t geni_i2c_irq(int irq, void *dev) { … } static void geni_i2c_abort_xfer(struct geni_i2c_dev *gi2c) { … } static void geni_i2c_rx_fsm_rst(struct geni_i2c_dev *gi2c) { … } static void geni_i2c_tx_fsm_rst(struct geni_i2c_dev *gi2c) { … } static void geni_i2c_rx_msg_cleanup(struct geni_i2c_dev *gi2c, struct i2c_msg *cur) { … } static void geni_i2c_tx_msg_cleanup(struct geni_i2c_dev *gi2c, struct i2c_msg *cur) { … } static int geni_i2c_rx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, u32 m_param) { … } static int geni_i2c_tx_one_msg(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, u32 m_param) { … } static void i2c_gpi_cb_result(void *cb, const struct dmaengine_result *result) { … } static void geni_i2c_gpi_unmap(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, void *tx_buf, dma_addr_t tx_addr, void *rx_buf, dma_addr_t rx_addr) { … } static int geni_i2c_gpi(struct geni_i2c_dev *gi2c, struct i2c_msg *msg, struct dma_slave_config *config, dma_addr_t *dma_addr_p, void **buf, unsigned int op, struct dma_chan *dma_chan) { … } static int geni_i2c_gpi_xfer(struct geni_i2c_dev *gi2c, struct i2c_msg msgs[], int num) { … } static int geni_i2c_fifo_xfer(struct geni_i2c_dev *gi2c, struct i2c_msg msgs[], int num) { … } static int geni_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) { … } static u32 geni_i2c_func(struct i2c_adapter *adap) { … } static const struct i2c_algorithm geni_i2c_algo = …; #ifdef CONFIG_ACPI static const struct acpi_device_id geni_i2c_acpi_match[] = …; MODULE_DEVICE_TABLE(acpi, geni_i2c_acpi_match); #endif static void release_gpi_dma(struct geni_i2c_dev *gi2c) { … } static int setup_gpi_dma(struct geni_i2c_dev *gi2c) { … } static int geni_i2c_probe(struct platform_device *pdev) { … } static void geni_i2c_remove(struct platform_device *pdev) { … } static void geni_i2c_shutdown(struct platform_device *pdev) { … } static int __maybe_unused geni_i2c_runtime_suspend(struct device *dev) { … } static int __maybe_unused geni_i2c_runtime_resume(struct device *dev) { … } static int __maybe_unused geni_i2c_suspend_noirq(struct device *dev) { … } static int __maybe_unused geni_i2c_resume_noirq(struct device *dev) { … } static const struct dev_pm_ops geni_i2c_pm_ops = …; static const struct geni_i2c_desc i2c_master_hub = …; static const struct of_device_id geni_i2c_dt_match[] = …; MODULE_DEVICE_TABLE(of, geni_i2c_dt_match); static struct platform_driver geni_i2c_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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