/* * Texas Instruments System Control Interface API * Based on Linux and U-Boot implementation * * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ * * SPDX-License-Identifier: BSD-3-Clause */ #ifndef __TI_SCI_H #define __TI_SCI_H #include #include /** * Device control operations * * - ti_sci_device_set_state - Set device state helper * @flags: flags to setup for the device * @state: State to move the device to * - ti_sci_device_get_state - Get device state helper * @clcnt: Pointer to Context Loss Count * @resets: pointer to resets * @p_state: pointer to p_state * @c_state: pointer to c_state * - ti_sci_device_get - command to request for device managed by TISCI * - ti_sci_device_idle - Command to idle a device managed by TISCI * - ti_sci_device_put - command to release a device managed by TISCI * - ti_sci_device_is_valid - Is the device valid * - ti_sci_device_get_clcnt - Get context loss counter * @count: Pointer to Context Loss counter to populate * - ti_sci_device_is_idle - Check if the device is requested to be idle * @r_state: true if requested to be idle * - ti_sci_device_is_stop - Check if the device is requested to be stopped * @r_state: true if requested to be stopped * @curr_state: true if currently stopped. * - ti_sci_device_is_on - Check if the device is requested to be ON * @r_state: true if requested to be ON * @curr_state: true if currently ON and active * - ti_sci_device_is_trans - Check if the device is currently transitioning * @curr_state: true if currently transitioning. * - ti_sci_device_set_resets - Command to set resets for * device managed by TISCI * @reset_state: Device specific reset bit field * - ti_sci_device_get_resets - Get reset state for device managed by TISCI * @reset_state: Pointer to reset state to populate * * NOTE: for all these functions, the following are generic in nature: * @id: Device Identifier * Returns 0 for successful request, else returns corresponding error message. * * Request for the device - NOTE: the client MUST maintain integrity of * usage count by balancing get_device with put_device. No refcounting is * managed by driver for that purpose. */ int ti_sci_device_set_state(uint32_t id, uint32_t flags, uint8_t state); int ti_sci_device_get_state(uint32_t id, uint32_t *clcnt, uint32_t *resets, uint8_t *p_state, uint8_t *c_state); int ti_sci_device_get(uint32_t id); int ti_sci_device_idle(uint32_t id); int ti_sci_device_put(uint32_t id); int ti_sci_device_is_valid(uint32_t id); int ti_sci_device_get_clcnt(uint32_t id, uint32_t *count); int ti_sci_device_is_idle(uint32_t id, bool *r_state); int ti_sci_device_is_stop(uint32_t id, bool *r_state, bool *curr_state); int ti_sci_device_is_on(uint32_t id, bool *r_state, bool *curr_state); int ti_sci_device_is_trans(uint32_t id, bool *curr_state); int ti_sci_device_set_resets(uint32_t id, uint32_t reset_state); int ti_sci_device_get_resets(uint32_t id, uint32_t *reset_state); /** * Clock control operations * * - ti_sci_clock_set_state - Set clock state helper * @flags: Header flags as needed * @state: State to request for the clock. * - ti_sci_clock_get_state - Get clock state helper * @programmed_state: State requested for clock to move to * @current_state: State that the clock is currently in * - ti_sci_clock_get - Get control of a clock from TI SCI * @needs_ssc: 'true' iff Spread Spectrum clock is desired * @can_change_freq: 'true' iff frequency change is desired * @enable_input_term: 'true' iff input termination is desired * - ti_sci_clock_idle - Idle a clock which is in our control * - ti_sci_clock_put - Release a clock from our control * - ti_sci_clock_is_auto - Is the clock being auto managed * @req_state: state indicating if the clock is auto managed * - ti_sci_clock_is_on - Is the clock ON * @req_state: state indicating if the clock is managed by us and enabled * @curr_state: state indicating if the clock is ready for operation * - ti_sci_clock_is_off - Is the clock OFF * @req_state: state indicating if the clock is managed by us and disabled * @curr_state: state indicating if the clock is NOT ready for operation * - ti_sci_clock_set_parent - Set the clock source of a specific device clock * @parent_id: Parent clock identifier to set * - ti_sci_clock_get_parent - Get current parent clock source * @parent_id: Current clock parent * - ti_sci_clock_get_num_parents - Get num parents of the current clk source * @num_parents: Returns he number of parents to the current clock. * - ti_sci_clock_get_match_freq - Find a good match for frequency * @match_freq: Frequency match in Hz response. * - ti_sci_clock_set_freq - Set a frequency for clock * - ti_sci_clock_get_freq - Get current frequency * @freq: Currently frequency in Hz * * NOTE: for all these functions, the following are generic in nature: * @dev_id: Device identifier this request is for * @clk_id: Clock identifier for the device for this request. * Each device has its own set of clock inputs. This indexes * which clock input to modify. * @min_freq: The minimum allowable frequency in Hz. This is the minimum * allowable programmed frequency and does not account for clock * tolerances and jitter. * @target_freq: The target clock frequency in Hz. A frequency will be * processed as close to this target frequency as possible. * @max_freq: The maximum allowable frequency in Hz. This is the maximum * allowable programmed frequency and does not account for clock * tolerances and jitter. * Returns 0 for successful request, else returns corresponding error message. * * Request for the clock - NOTE: the client MUST maintain integrity of * usage count by balancing get_clock with put_clock. No refcounting is * managed by driver for that purpose. */ int ti_sci_clock_set_state(uint32_t dev_id, uint8_t clk_id, uint32_t flags, uint8_t state); int ti_sci_clock_get_state(uint32_t dev_id, uint8_t clk_id, uint8_t *programmed_state, uint8_t *current_state); int ti_sci_clock_get(uint32_t dev_id, uint8_t clk_id, bool needs_ssc, bool can_change_freq, bool enable_input_term); int ti_sci_clock_idle(uint32_t dev_id, uint8_t clk_id); int ti_sci_clock_put(uint32_t dev_id, uint8_t clk_id); int ti_sci_clock_is_auto(uint32_t dev_id, uint8_t clk_id, bool *req_state); int ti_sci_clock_is_on(uint32_t dev_id, uint8_t clk_id, bool *req_state, bool *curr_state); int ti_sci_clock_is_off(uint32_t dev_id, uint8_t clk_id, bool *req_state, bool *curr_state); int ti_sci_clock_set_parent(uint32_t dev_id, uint8_t clk_id, uint8_t parent_id); int ti_sci_clock_get_parent(uint32_t dev_id, uint8_t clk_id, uint8_t *parent_id); int ti_sci_clock_get_num_parents(uint32_t dev_id, uint8_t clk_id, uint8_t *num_parents); int ti_sci_clock_get_match_freq(uint32_t dev_id, uint8_t clk_id, uint64_t min_freq, uint64_t target_freq, uint64_t max_freq, uint64_t *match_freq); int ti_sci_clock_set_freq(uint32_t dev_id, uint8_t clk_id, uint64_t min_freq, uint64_t target_freq, uint64_t max_freq); int ti_sci_clock_get_freq(uint32_t dev_id, uint8_t clk_id, uint64_t *freq); /** * ti_sci_init() - Basic initialization * * Return: 0 if all goes good, else appropriate error message. */ int ti_sci_init(void); #endif /* __TI_SCI_H */