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c04a3b6c18
This patch adds the SCMI driver for communicating with SCP. The power domain management and system power management protocol of the SCMI specification[1] is implemented in the driver. The SCP power management abstraction layer for SCMI for CSS power management is also added. A new buid option `CSS_USE_SCMI_DRIVER` is introduced to select SCMI driver over SCPI. [1] ARM System Control and Management Interface v1.0 (SCMI) Document number: ARM DEN 0056A Change-Id: I67265615a17e679a2afe810b9b0043711ba09dbb Signed-off-by: Soby Mathew <soby.mathew@arm.com>
74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
/*
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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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#include <arch_helpers.h>
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#include <assert.h>
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#include <debug.h>
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#include "scmi.h"
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#include "scmi_private.h"
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/*
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* API to set the SCMI system power state
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*/
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int scmi_sys_pwr_state_set(void *p, uint32_t flags, uint32_t system_state)
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{
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mailbox_mem_t *mbx_mem;
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int token = 0, ret;
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scmi_channel_t *ch = (scmi_channel_t *)p;
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validate_scmi_channel(ch);
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scmi_get_channel(ch);
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mbx_mem = (mailbox_mem_t *)(ch->info->scmi_mbx_mem);
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mbx_mem->msg_header = SCMI_MSG_CREATE(SCMI_SYS_PWR_PROTO_ID,
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SCMI_SYS_PWR_STATE_SET_MSG, token);
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mbx_mem->len = SCMI_SYS_PWR_STATE_SET_MSG_LEN;
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mbx_mem->flags = SCMI_FLAG_RESP_POLL;
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SCMI_PAYLOAD_ARG2(mbx_mem->payload, flags, system_state);
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scmi_send_sync_command(ch);
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/* Get the return values */
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SCMI_PAYLOAD_RET_VAL1(mbx_mem->payload, ret);
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assert(mbx_mem->len == SCMI_SYS_PWR_STATE_SET_RESP_LEN);
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assert(token == SCMI_MSG_GET_TOKEN(mbx_mem->msg_header));
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scmi_put_channel(ch);
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return ret;
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}
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/*
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* API to get the SCMI system power state
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*/
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int scmi_sys_pwr_state_get(void *p, uint32_t *system_state)
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{
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mailbox_mem_t *mbx_mem;
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int token = 0, ret;
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scmi_channel_t *ch = (scmi_channel_t *)p;
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validate_scmi_channel(ch);
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scmi_get_channel(ch);
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mbx_mem = (mailbox_mem_t *)(ch->info->scmi_mbx_mem);
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mbx_mem->msg_header = SCMI_MSG_CREATE(SCMI_SYS_PWR_PROTO_ID,
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SCMI_SYS_PWR_STATE_GET_MSG, token);
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mbx_mem->len = SCMI_SYS_PWR_STATE_GET_MSG_LEN;
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mbx_mem->flags = SCMI_FLAG_RESP_POLL;
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scmi_send_sync_command(ch);
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/* Get the return values */
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SCMI_PAYLOAD_RET_VAL2(mbx_mem->payload, ret, *system_state);
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assert(mbx_mem->len == SCMI_SYS_PWR_STATE_GET_RESP_LEN);
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assert(token == SCMI_MSG_GET_TOKEN(mbx_mem->msg_header));
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scmi_put_channel(ch);
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return ret;
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}
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