// SPDX-License-Identifier: GPL-2.0 /* Texas Instruments ICSSG Industrial Ethernet Peripheral (IEP) Driver * * Copyright (C) 2023 Texas Instruments Incorporated - https://www.ti.com * */ #include <linux/bitops.h> #include <linux/clk.h> #include <linux/err.h> #include <linux/io.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_platform.h> #include <linux/platform_device.h> #include <linux/timekeeping.h> #include <linux/interrupt.h> #include <linux/of_irq.h> #include <linux/workqueue.h> #include "icss_iep.h" #define IEP_MAX_DEF_INC … #define IEP_MAX_COMPEN_INC … #define IEP_MAX_COMPEN_COUNT … #define IEP_GLOBAL_CFG_CNT_ENABLE … #define IEP_GLOBAL_CFG_DEFAULT_INC_MASK … #define IEP_GLOBAL_CFG_DEFAULT_INC_SHIFT … #define IEP_GLOBAL_CFG_COMPEN_INC_MASK … #define IEP_GLOBAL_CFG_COMPEN_INC_SHIFT … #define IEP_GLOBAL_STATUS_CNT_OVF … #define IEP_CMP_CFG_SHADOW_EN … #define IEP_CMP_CFG_CMP0_RST_CNT_EN … #define IEP_CMP_CFG_CMP_EN(cmp) … #define IEP_CMP_STATUS(cmp) … #define IEP_SYNC_CTRL_SYNC_EN … #define IEP_SYNC_CTRL_SYNC_N_EN(n) … #define IEP_MIN_CMP … #define IEP_MAX_CMP … #define ICSS_IEP_64BIT_COUNTER_SUPPORT … #define ICSS_IEP_SLOW_COMPEN_REG_SUPPORT … #define ICSS_IEP_SHADOW_MODE_SUPPORT … #define LATCH_INDEX(ts_index) … #define IEP_CAP_CFG_CAPNR_1ST_EVENT_EN(n) … #define IEP_CAP_CFG_CAP_ASYNC_EN(n) … /** * icss_iep_get_count_hi() - Get the upper 32 bit IEP counter * @iep: Pointer to structure representing IEP. * * Return: upper 32 bit IEP counter */ int icss_iep_get_count_hi(struct icss_iep *iep) { … } EXPORT_SYMBOL_GPL(…); /** * icss_iep_get_count_low() - Get the lower 32 bit IEP counter * @iep: Pointer to structure representing IEP. * * Return: lower 32 bit IEP counter */ int icss_iep_get_count_low(struct icss_iep *iep) { … } EXPORT_SYMBOL_GPL(…); /** * icss_iep_get_ptp_clock_idx() - Get PTP clock index using IEP driver * @iep: Pointer to structure representing IEP. * * Return: PTP clock index, -1 if not registered */ int icss_iep_get_ptp_clock_idx(struct icss_iep *iep) { … } EXPORT_SYMBOL_GPL(…); static void icss_iep_set_counter(struct icss_iep *iep, u64 ns) { … } static void icss_iep_update_to_next_boundary(struct icss_iep *iep, u64 start_ns); /** * icss_iep_settime() - Set time of the PTP clock using IEP driver * @iep: Pointer to structure representing IEP. * @ns: Time to be set in nanoseconds * * This API uses writel() instead of regmap_write() for write operations as * regmap_write() is too slow and this API is time sensitive. */ static void icss_iep_settime(struct icss_iep *iep, u64 ns) { … } /** * icss_iep_gettime() - Get time of the PTP clock using IEP driver * @iep: Pointer to structure representing IEP. * @sts: Pointer to structure representing PTP system timestamp. * * This API uses readl() instead of regmap_read() for read operations as * regmap_read() is too slow and this API is time sensitive. * * Return: The current timestamp of the PTP clock using IEP driver */ static u64 icss_iep_gettime(struct icss_iep *iep, struct ptp_system_timestamp *sts) { … } static void icss_iep_enable(struct icss_iep *iep) { … } static void icss_iep_disable(struct icss_iep *iep) { … } static void icss_iep_enable_shadow_mode(struct icss_iep *iep) { … } static void icss_iep_set_default_inc(struct icss_iep *iep, u8 def_inc) { … } static void icss_iep_set_compensation_inc(struct icss_iep *iep, u16 compen_inc) { … } static void icss_iep_set_compensation_count(struct icss_iep *iep, u32 compen_count) { … } static void icss_iep_set_slow_compensation_count(struct icss_iep *iep, u32 compen_count) { … } /* PTP PHC operations */ static int icss_iep_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm) { … } static int icss_iep_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta) { … } static int icss_iep_ptp_gettimeex(struct ptp_clock_info *ptp, struct timespec64 *ts, struct ptp_system_timestamp *sts) { … } static int icss_iep_ptp_settime(struct ptp_clock_info *ptp, const struct timespec64 *ts) { … } static void icss_iep_update_to_next_boundary(struct icss_iep *iep, u64 start_ns) { … } static int icss_iep_perout_enable_hw(struct icss_iep *iep, struct ptp_perout_request *req, int on) { … } static int icss_iep_perout_enable(struct icss_iep *iep, struct ptp_perout_request *req, int on) { … } static void icss_iep_cap_cmp_work(struct work_struct *work) { … } static irqreturn_t icss_iep_cap_cmp_irq(int irq, void *dev_id) { … } static int icss_iep_pps_enable(struct icss_iep *iep, int on) { … } static int icss_iep_extts_enable(struct icss_iep *iep, u32 index, int on) { … } static int icss_iep_ptp_enable(struct ptp_clock_info *ptp, struct ptp_clock_request *rq, int on) { … } static struct ptp_clock_info icss_iep_ptp_info = …; struct icss_iep *icss_iep_get_idx(struct device_node *np, int idx) { … } EXPORT_SYMBOL_GPL(…); struct icss_iep *icss_iep_get(struct device_node *np) { … } EXPORT_SYMBOL_GPL(…); void icss_iep_put(struct icss_iep *iep) { … } EXPORT_SYMBOL_GPL(…); void icss_iep_init_fw(struct icss_iep *iep) { … } EXPORT_SYMBOL_GPL(…); void icss_iep_exit_fw(struct icss_iep *iep) { … } EXPORT_SYMBOL_GPL(…); int icss_iep_init(struct icss_iep *iep, const struct icss_iep_clockops *clkops, void *clockops_data, u32 cycle_time_ns) { … } EXPORT_SYMBOL_GPL(…); int icss_iep_exit(struct icss_iep *iep) { … } EXPORT_SYMBOL_GPL(…); static int icss_iep_probe(struct platform_device *pdev) { … } static bool am654_icss_iep_valid_reg(struct device *dev, unsigned int reg) { … } static int icss_iep_regmap_write(void *context, unsigned int reg, unsigned int val) { … } static int icss_iep_regmap_read(void *context, unsigned int reg, unsigned int *val) { … } static const struct regmap_config am654_icss_iep_regmap_config = …; static const struct icss_iep_plat_data am654_icss_iep_plat_data = …; static const struct of_device_id icss_iep_of_match[] = …; MODULE_DEVICE_TABLE(of, icss_iep_of_match); static struct platform_driver icss_iep_driver = …; module_platform_driver(…) …; MODULE_LICENSE(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …;
Codebase Browser
linux