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