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/*
* Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef BPMP_H
#define BPMP_H
#include <stdint.h>
/* macro to enable clock to the Atomics block */
#define CAR_ENABLE_ATOMICS (1U << 16)
/* command to get the channel base addresses from bpmp */
#define ATOMIC_CMD_GET 4U
/* Hardware IRQ # used to signal bpmp of an incoming command */
#define INT_SHR_SEM_OUTBOX_FULL 6U
/* macros to decode the bpmp's state */
#define CH_MASK(ch) ((uint32_t)0x3 << ((ch) * 2U))
#define MA_FREE(ch) ((uint32_t)0x2 << ((ch) * 2U))
#define MA_ACKD(ch) ((uint32_t)0x3 << ((ch) * 2U))
/* response from bpmp to indicate it has powered up */
#define SIGN_OF_LIFE 0xAAAAAAAAU
/* flags to indicate bpmp driver's state */
#define BPMP_NOT_PRESENT 0xF00DBEEFU
#define BPMP_INIT_COMPLETE 0xBEEFF00DU
#define BPMP_INIT_PENDING 0xDEADBEEFU
#define BPMP_SUSPEND_ENTRY 0xF00DCAFEU
/* requests serviced by the bpmp */
#define MRQ_PING 0
#define MRQ_QUERY_TAG 1
#define MRQ_DO_IDLE 2
#define MRQ_TOLERATE_IDLE 3
#define MRQ_MODULE_LOAD 4
#define MRQ_MODULE_UNLOAD 5
#define MRQ_SWITCH_CLUSTER 6
#define MRQ_TRACE_MODIFY 7
#define MRQ_WRITE_TRACE 8
#define MRQ_THREADED_PING 9
#define MRQ_CPUIDLE_USAGE 10
#define MRQ_MODULE_MAIL 11
#define MRQ_SCX_ENABLE 12
#define MRQ_BPMPIDLE_USAGE 14
#define MRQ_HEAP_USAGE 15
#define MRQ_SCLK_SKIP_SET_RATE 16
#define MRQ_ENABLE_SUSPEND 17
#define MRQ_PASR_MASK 18
#define MRQ_DEBUGFS 19
#define MRQ_THERMAL 27
/* Tegra PM states as known to BPMP */
#define TEGRA_PM_CC1 9
#define TEGRA_PM_CC4 12
#define TEGRA_PM_CC6 14
#define TEGRA_PM_CC7 15
#define TEGRA_PM_SC1 17
#define TEGRA_PM_SC2 18
#define TEGRA_PM_SC3 19
#define TEGRA_PM_SC4 20
#define TEGRA_PM_SC7 23
/* flag to indicate if entry into a CCx power state is allowed */
#define BPMP_CCx_ALLOWED 0U
/* number of communication channels to interact with the bpmp */
#define NR_CHANNELS 4U
/* flag to ask bpmp to acknowledge command packet */
#define NO_ACK (0U << 0U)
#define DO_ACK (1U << 0U)
/* size of the command/response data */
#define MSG_DATA_MAX_SZ 120U
/**
* command/response packet to/from the bpmp
*
* command
* -------
* code: MRQ_* command
* flags: DO_ACK or NO_ACK
* data:
* [0] = cpu #
* [1] = cluster power state (TEGRA_PM_CCx)
* [2] = system power state (TEGRA_PM_SCx)
*
* response
* ---------
* code: error code
* flags: not used
* data:
* [0-3] = response value
*/
typedef struct mb_data {
int32_t code;
uint32_t flags;
uint8_t data[MSG_DATA_MAX_SZ];
} mb_data_t;
/**
* Function to initialise the interface with the bpmp
*/
int tegra_bpmp_init(void);
/**
* Function to suspend the interface with the bpmp
*/
void tegra_bpmp_suspend(void);
/**
* Function to resume the interface with the bpmp
*/
void tegra_bpmp_resume(void);
/**
* Handler to send a MRQ_* command to the bpmp
*/
int32_t tegra_bpmp_send_receive_atomic(int mrq, const void *ob_data, int ob_sz,
void *ib_data, int ib_sz);
#endif /* BPMP_H */
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