/** * enum hte_edge - HTE line edge flags. * * @HTE_EDGE_NO_SETUP: No edge setup. In this case consumer will setup edges, * for example during request irq call. * @HTE_RISING_EDGE_TS: Rising edge. * @HTE_FALLING_EDGE_TS: Falling edge. *
*/ enum hte_edge {
HTE_EDGE_NO_SETUP = 1U << 0,
HTE_RISING_EDGE_TS = 1U << 1,
HTE_FALLING_EDGE_TS = 1U << 2,
};
/** * enum hte_return - HTE subsystem return values used during callback. * * @HTE_CB_HANDLED: The consumer handled the data. * @HTE_RUN_SECOND_CB: The consumer needs further processing, in that case * HTE subsystem calls secondary callback provided by the consumer where it * is allowed to sleep.
*/ enum hte_return {
HTE_CB_HANDLED,
HTE_RUN_SECOND_CB,
};
/** * struct hte_ts_data - HTE timestamp data. * * @tsc: Timestamp value. * @seq: Sequence counter of the timestamps. * @raw_level: Level of the line at the timestamp if provider supports it, * -1 otherwise.
*/ struct hte_ts_data {
u64 tsc;
u64 seq; int raw_level;
};
/** * struct hte_clk_info - Clock source info that HTE provider uses to timestamp. * * @hz: Supported clock rate in HZ, for example 1KHz clock = 1000. * @type: Supported clock type.
*/ struct hte_clk_info {
u64 hz;
clockid_t type;
};
/** * typedef hte_ts_cb_t - HTE timestamp data processing primary callback. * * The callback is used to push timestamp data to the client and it is * not allowed to sleep. * * @ts: HW timestamp data. * @data: Client supplied data.
*/ typedefenum hte_return (*hte_ts_cb_t)(struct hte_ts_data *ts, void *data);
/** * typedef hte_ts_sec_cb_t - HTE timestamp data processing secondary callback. * * This is used when the client needs further processing where it is * allowed to sleep. * * @data: Client supplied data. *
*/ typedefenum hte_return (*hte_ts_sec_cb_t)(void *data);
/** * struct hte_line_attr - Line attributes. * * @line_id: The logical ID understood by the consumers and providers. * @line_data: Line data related to line_id. * @edge_flags: Edge setup flags. * @name: Descriptive name of the entity that is being monitored for the * hardware timestamping. If null, HTE core will construct the name. *
*/ struct hte_line_attr {
u32 line_id; void *line_data; unsignedlong edge_flags; constchar *name;
};
/** * struct hte_ts_desc - HTE timestamp descriptor. * * This structure is a communication token between consumers to subsystem * and subsystem to providers. * * @attr: The line attributes. * @hte_data: Subsystem's private data, set by HTE subsystem.
*/ struct hte_ts_desc { struct hte_line_attr attr; void *hte_data;
};
/** * struct hte_ops - HTE operations set by providers. * * @request: Hook for requesting a HTE timestamp. Returns 0 on success, * non-zero for failures. * @release: Hook for releasing a HTE timestamp. Returns 0 on success, * non-zero for failures. * @enable: Hook to enable the specified timestamp. Returns 0 on success, * non-zero for failures. * @disable: Hook to disable specified timestamp. Returns 0 on success, * non-zero for failures. * @get_clk_src_info: Hook to get the clock information the provider uses * to timestamp. Returns 0 for success and negative error code for failure. On * success HTE subsystem fills up provided struct hte_clk_info. * * xlated_id parameter is used to communicate between HTE subsystem and the * providers and is translated by the provider.
*/ struct hte_ops { int (*request)(struct hte_chip *chip, struct hte_ts_desc *desc,
u32 xlated_id); int (*release)(struct hte_chip *chip, struct hte_ts_desc *desc,
u32 xlated_id); int (*enable)(struct hte_chip *chip, u32 xlated_id); int (*disable)(struct hte_chip *chip, u32 xlated_id); int (*get_clk_src_info)(struct hte_chip *chip, struct hte_clk_info *ci);
};
/** * struct hte_chip - Abstract HTE chip. * * @name: functional name of the HTE IP block. * @dev: device providing the HTE. * @ops: callbacks for this HTE. * @nlines: number of lines/signals supported by this chip. * @xlate_of: Callback which translates consumer supplied logical ids to * physical ids, return 0 for the success and negative for the failures. * It stores (between 0 to @nlines) in xlated_id parameter for the success. * @xlate_plat: Same as above but for the consumers with no DT node. * @match_from_linedata: Match HTE device using the line_data. * @of_hte_n_cells: Number of cells used to form the HTE specifier. * @gdev: HTE subsystem abstract device, internal to the HTE subsystem. * @data: chip specific private data.
*/ struct hte_chip { constchar *name; struct device *dev; conststruct hte_ops *ops;
u32 nlines; int (*xlate_of)(struct hte_chip *gc, conststruct of_phandle_args *args, struct hte_ts_desc *desc, u32 *xlated_id); int (*xlate_plat)(struct hte_chip *gc, struct hte_ts_desc *desc,
u32 *xlated_id); bool (*match_from_linedata)(conststruct hte_chip *chip, conststruct hte_ts_desc *hdesc);
u8 of_hte_n_cells;
struct hte_device *gdev; void *data;
};
#if IS_ENABLED(CONFIG_HTE) /* HTE APIs for the providers */ int devm_hte_register_chip(struct hte_chip *chip); int hte_push_ts_ns(conststruct hte_chip *chip, u32 xlated_id, struct hte_ts_data *data);
/* HTE APIs for the consumers */ int hte_init_line_attr(struct hte_ts_desc *desc, u32 line_id, unsignedlong edge_flags, constchar *name, void *data); int hte_ts_get(struct device *dev, struct hte_ts_desc *desc, int index); int hte_ts_put(struct hte_ts_desc *desc); int hte_request_ts_ns(struct hte_ts_desc *desc, hte_ts_cb_t cb,
hte_ts_sec_cb_t tcb, void *data); int devm_hte_request_ts_ns(struct device *dev, struct hte_ts_desc *desc,
hte_ts_cb_t cb, hte_ts_sec_cb_t tcb, void *data); int of_hte_req_count(struct device *dev); int hte_enable_ts(struct hte_ts_desc *desc); int hte_disable_ts(struct hte_ts_desc *desc); int hte_get_clk_src_info(conststruct hte_ts_desc *desc, struct hte_clk_info *ci);
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