71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2019 MediaTek Inc.
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*/
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#ifndef __SPMTWAM_H__
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#define __SPMTWAM_H__
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#define MONTYPE_RISING (0)
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#define MONTYPE_FALLING (1)
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#define MONTYPE_HIGH_LEVEL (2)
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#define MONITPE_LOW_LEVEL (3)
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#define SPEED_MODE_NORMAL (0)
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#define SPEED_MODE_SPEED (1)
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#define DEFAULT_MONTYPE MONTYPE_HIGH_LEVEL
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#define DEFAULT_SPEED_MODE SPEED_MODE_SPEED
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#define TWAM_PERIOD_MS (1000)
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#define WINDOW_LEN_SPEED (TWAM_PERIOD_MS * 0x65B8)
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#define WINDOW_LEN_NORMAL (TWAM_PERIOD_MS * 0xD)
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#define GET_EVENT_RATIO_SPEED(x) ((x)/(WINDOW_LEN_SPEED/1000))
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#define GET_EVENT_RATIO_NORMAL(x) ((x)/(WINDOW_LEN_NORMAL/1000))
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struct spmtwam_channel {
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u32 signal; /* 2 bits, signal A~D */
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u32 id; /* 5 bits, id 0~31 */
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u32 montype; /* 2 bits, monitor type */
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};
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struct spmtwam_cfg {
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struct spmtwam_channel ch[4]; /* channel 0~3 config */
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u32 spmtwam_speed_mode; /* 0: normal, 1: high speed */
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u32 spmtwam_window_len;
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/* spmtwam_window_len
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* 0: will be automatically updated for current speed mode
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* for normal speed mode, set to WINDOW_LEN_NORMAL.
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* for high speed mode, set to WINDOW_LEN_SPEED.
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*/
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};
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/* definitions for return result */
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struct spmtwam_result {
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struct spmtwam_cfg cfg;
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u32 value[4];
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};
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/* callback function return result stored in 'result', which also contains
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* corresponding spmtwam configs
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*/
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typedef void (*spmtwam_handler_t)(struct spmtwam_result *result);
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/* spmtwam enable/disable api:
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* parameters:
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* enable - true: start twam monitor, false: stop monitor
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* cfg - configs to setup spmtwam
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* handler - register callback function to receive results
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* return value:
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* 0 - success
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* -EINVAL - invalid parameter(s)
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* -EAGAIN - resource temporarily unavailable, already enabled ?
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* -ENODEV - no such device or driver is not initialized.
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*/
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int spmtwam_monitor(bool enable, struct spmtwam_cfg *cfg,
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spmtwam_handler_t handler);
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#endif /* __SPMTWAM_H__ */
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