diff options
Diffstat (limited to 'drivers/firmware/scmi/pwdom.c')
| -rw-r--r-- | drivers/firmware/scmi/pwdom.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/drivers/firmware/scmi/pwdom.c b/drivers/firmware/scmi/pwdom.c new file mode 100644 index 0000000000..de2ba4755a --- /dev/null +++ b/drivers/firmware/scmi/pwdom.c @@ -0,0 +1,188 @@ +// 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; +} |