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/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* NPCX-specific MFT module for Chrome EC */
#ifndef __CROS_EC_FAN_CHIP_H
#define __CROS_EC_FAN_CHIP_H
/* MFT module select */
enum npcx_mft_module {
NPCX_MFT_MODULE_1 = 0,
NPCX_MFT_MODULE_2 = 0,
NPCX_MFT_MODULE_3 = 0,
/* Number of MFT modules */
NPCX_MFT_MODULE_COUNT
};
/* MFT module port */
enum npcx_mft_module_port {
NPCX_MFT_MODULE_PORT_TA,
NPCX_MFT_MODULE_PORT_TB,
/* Number of MFT module ports */
NPCX_MFT_MODULE_PORT_COUNT
};
/* Data structure to define MFT channels. */
struct mft_t {
/* MFT module ID */
enum npcx_mft_module module;
/* MFT port */
enum npcx_mft_module_port port;
/* MFT TCNT default count */
uint32_t default_count;
/* MFT freq */
uint32_t freq;
};
/* Tacho measurement state */
enum tacho_measure_state {
/* Tacho init state */
TACHO_IN_IDLE = 0,
/* Tacho first edge state */
TACHO_WAIT_FOR_1_EDGE,
/* Tacho second edge state */
TACHO_WAIT_FOR_2_EDGE,
/* Tacho underflow state */
TACHO_UNDERFLOW
};
/* Tacho status data structure */
struct tacho_status_t {
/* Current state of the measurement */
enum tacho_measure_state cur_state;
/* Pulse counter value between edge1 and edge2 */
uint32_t edge_interval;
};
extern const struct mft_t mft_channels[];
#endif /* __CROS_EC_FAN_CHIP_H */
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