forked from mirrors/linux
e68c305bc2
This protocol allows an agent to start, stop a CPU or set reset vector. It is used to manage auxiliary CPUs in an LM (e.g. additional cores in an AP cluster). Signed-off-by: Peng Fan <peng.fan@nxp.com> Message-Id: <20250408-imx-lmm-cpu-v4-4-4c5f4a456e49@nxp.com> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
102 lines
2.7 KiB
C
102 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* SCMI Message Protocol driver NXP extension header
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*
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* Copyright 2024 NXP.
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*/
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#ifndef _LINUX_SCMI_NXP_PROTOCOL_H
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#define _LINUX_SCMI_NXP_PROTOCOL_H
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#include <linux/bitfield.h>
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#include <linux/device.h>
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#include <linux/notifier.h>
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#include <linux/scmi_protocol.h>
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#include <linux/types.h>
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#define SCMI_PROTOCOL_IMX_LMM 0x80
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#define SCMI_PROTOCOL_IMX_BBM 0x81
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#define SCMI_PROTOCOL_IMX_CPU 0x82
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#define SCMI_PROTOCOL_IMX_MISC 0x84
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#define SCMI_IMX_VENDOR "NXP"
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#define SCMI_IMX_SUBVENDOR "IMX"
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struct scmi_imx_bbm_proto_ops {
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int (*rtc_time_set)(const struct scmi_protocol_handle *ph, u32 id,
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uint64_t sec);
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int (*rtc_time_get)(const struct scmi_protocol_handle *ph, u32 id,
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u64 *val);
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int (*rtc_alarm_set)(const struct scmi_protocol_handle *ph, u32 id,
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bool enable, u64 sec);
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int (*button_get)(const struct scmi_protocol_handle *ph, u32 *state);
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};
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enum scmi_nxp_notification_events {
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SCMI_EVENT_IMX_BBM_RTC = 0x0,
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SCMI_EVENT_IMX_BBM_BUTTON = 0x1,
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SCMI_EVENT_IMX_MISC_CONTROL = 0x0,
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};
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struct scmi_imx_bbm_notif_report {
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bool is_rtc;
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bool is_button;
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ktime_t timestamp;
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unsigned int rtc_id;
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unsigned int rtc_evt;
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};
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struct scmi_imx_misc_ctrl_notify_report {
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ktime_t timestamp;
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unsigned int ctrl_id;
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unsigned int flags;
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};
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struct scmi_imx_misc_proto_ops {
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int (*misc_ctrl_set)(const struct scmi_protocol_handle *ph, u32 id,
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u32 num, u32 *val);
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int (*misc_ctrl_get)(const struct scmi_protocol_handle *ph, u32 id,
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u32 *num, u32 *val);
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int (*misc_ctrl_req_notify)(const struct scmi_protocol_handle *ph,
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u32 ctrl_id, u32 evt_id, u32 flags);
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};
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/* See LMM_ATTRIBUTES in imx95.rst */
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#define LMM_ID_DISCOVER 0xFFFFFFFFU
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#define LMM_MAX_NAME 16
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enum scmi_imx_lmm_state {
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LMM_STATE_LM_OFF,
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LMM_STATE_LM_ON,
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LMM_STATE_LM_SUSPEND,
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LMM_STATE_LM_POWERED,
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};
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struct scmi_imx_lmm_info {
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u32 lmid;
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enum scmi_imx_lmm_state state;
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u32 errstatus;
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u8 name[LMM_MAX_NAME];
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};
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struct scmi_imx_lmm_proto_ops {
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int (*lmm_power_boot)(const struct scmi_protocol_handle *ph, u32 lmid,
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bool boot);
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int (*lmm_info)(const struct scmi_protocol_handle *ph, u32 lmid,
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struct scmi_imx_lmm_info *info);
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int (*lmm_reset_vector_set)(const struct scmi_protocol_handle *ph,
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u32 lmid, u32 cpuid, u32 flags, u64 vector);
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int (*lmm_shutdown)(const struct scmi_protocol_handle *ph, u32 lmid,
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u32 flags);
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};
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struct scmi_imx_cpu_proto_ops {
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int (*cpu_reset_vector_set)(const struct scmi_protocol_handle *ph,
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u32 cpuid, u64 vector, bool start,
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bool boot, bool resume);
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int (*cpu_start)(const struct scmi_protocol_handle *ph, u32 cpuid,
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bool start);
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int (*cpu_started)(const struct scmi_protocol_handle *ph, u32 cpuid,
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bool *started);
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};
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#endif
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