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// SPDX-License-Identifier: GPL-2.0+
/*
* SCMI Power domain management protocol
*
* Copyright (C) 2023 Linaro Limited
* author: AKASHI Takahiro <takahiro.akashi@linaro.org>
*/
#include <dm.h>
#include <malloc.h>
#include <scmi_agent.h>
#include <scmi_protocols.h>
#include <string.h>
#include <asm/types.h>
int scmi_pwd_protocol_attrs(struct udevice *dev, int *num_pwdoms,
u64 *stats_addr, size_t *stats_len)
{
struct scmi_pwd_protocol_attrs_out out;
struct scmi_msg msg = {
.protocol_id = SCMI_PROTOCOL_ID_POWER_DOMAIN,
.message_id = SCMI_PROTOCOL_ATTRIBUTES,
.out_msg = (u8 *)&out,
.out_msg_sz = sizeof(out),
};
int ret;
if (!dev || !num_pwdoms || !stats_addr || !stats_len)
return -EINVAL;
ret = devm_scmi_process_msg(dev, &msg);
if (ret)
return ret;
if (out.status)
return scmi_to_linux_errno(out.status);
*num_pwdoms = SCMI_PWD_PROTO_ATTRS_NUM_PWD(out.attributes);
*stats_addr = ((u64)out.stats_addr_high << 32) + out.stats_addr_low;
*stats_len = out.stats_len;
return 0;
}
int scmi_pwd_protocol_message_attrs(struct udevice *dev, s32 message_id,
u32 *attributes)
{
struct scmi_pwd_protocol_msg_attrs_out out;
struct scmi_msg msg = {
.protocol_id = SCMI_PROTOCOL_ID_POWER_DOMAIN,
.message_id = SCMI_PROTOCOL_MESSAGE_ATTRIBUTES,
.in_msg = (u8 *)&message_id,
.in_msg_sz = sizeof(message_id),
.out_msg = (u8 *)&out,
.out_msg_sz = sizeof(out),
};
int ret;
if (!dev || !attributes)
return -EINVAL;
ret = devm_scmi_process_msg(dev, &msg);
if (ret)
return ret;
if (out.status)
return scmi_to_linux_errno(out.status);
*attributes = out.attributes;
return 0;
}
int scmi_pwd_attrs(struct udevice *dev, u32 domain_id, u32 *attributes,
u8 **name)
{
struct scmi_pwd_attrs_out out;
struct scmi_msg msg = {
.protocol_id = SCMI_PROTOCOL_ID_POWER_DOMAIN,
.message_id = SCMI_PWD_ATTRIBUTES,
.in_msg = (u8 *)&domain_id,
.in_msg_sz = sizeof(domain_id),
.out_msg = (u8 *)&out,
.out_msg_sz = sizeof(out),
};
int ret;
if (!dev || !attributes || !name)
return -EINVAL;
ret = devm_scmi_process_msg(dev, &msg);
if (ret)
return ret;
if (out.status)
return scmi_to_linux_errno(out.status);
*name = strdup(out.name);
if (!*name)
return -ENOMEM;
*attributes = out.attributes;
return 0;
}
int scmi_pwd_state_set(struct udevice *dev, u32 flags, u32 domain_id,
u32 pstate)
{
struct scmi_pwd_state_set_in in;
s32 status;
struct scmi_msg msg = {
.protocol_id = SCMI_PROTOCOL_ID_POWER_DOMAIN,
.message_id = SCMI_PWD_STATE_SET,
.in_msg = (u8 *)&in,
.in_msg_sz = sizeof(in),
.out_msg = (u8 *)&status,
.out_msg_sz = sizeof(status),
};
int ret;
if (!dev)
return -EINVAL;
in.flags = flags;
in.domain_id = domain_id;
in.pstate = pstate;
ret = devm_scmi_process_msg(dev, &msg);
if (ret)
return ret;
if (status)
return scmi_to_linux_errno(status);
return 0;
}
int scmi_pwd_state_get(struct udevice *dev, u32 domain_id, u32 *pstate)
{
struct scmi_pwd_state_get_out out;
struct scmi_msg msg = {
.protocol_id = SCMI_PROTOCOL_ID_POWER_DOMAIN,
.message_id = SCMI_PWD_STATE_GET,
.in_msg = (u8 *)&domain_id,
.in_msg_sz = sizeof(domain_id),
.out_msg = (u8 *)&out,
.out_msg_sz = sizeof(out),
};
int ret;
if (!dev || !pstate)
return -EINVAL;
ret = devm_scmi_process_msg(dev, &msg);
if (ret)
return ret;
if (out.status)
return scmi_to_linux_errno(out.status);
*pstate = out.pstate;
return 0;
}
int scmi_pwd_name_get(struct udevice *dev, u32 domain_id, u8 **name)
{
struct scmi_pwd_name_get_out out;
struct scmi_msg msg = {
.protocol_id = SCMI_PROTOCOL_ID_POWER_DOMAIN,
.message_id = SCMI_PWD_NAME_GET,
.in_msg = (u8 *)&domain_id,
.in_msg_sz = sizeof(domain_id),
.out_msg = (u8 *)&out,
.out_msg_sz = sizeof(out),
};
int ret;
if (!dev || !name)
return -EINVAL;
ret = devm_scmi_process_msg(dev, &msg);
if (ret)
return ret;
if (out.status)
return scmi_to_linux_errno(out.status);
*name = strdup(out.extended_name);
if (!*name)
return -ENOMEM;
return 0;
}
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