1 /*
2 * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7 #include <assert.h>
8
9 #include <arch_helpers.h>
10 #include <common/debug.h>
11 #include <drivers/arm/css/scmi.h>
12
13 #include "scmi_private.h"
14
15 /*
16 * API to set the SCMI system power state
17 */
scmi_sys_pwr_state_set(void * p,uint32_t flags,uint32_t system_state)18 int scmi_sys_pwr_state_set(void *p, uint32_t flags, uint32_t system_state)
19 {
20 mailbox_mem_t *mbx_mem;
21 unsigned int token = 0;
22 int ret;
23 scmi_channel_t *ch = (scmi_channel_t *)p;
24
25 validate_scmi_channel(ch);
26
27 scmi_get_channel(ch);
28
29 mbx_mem = (mailbox_mem_t *)(ch->info->scmi_mbx_mem);
30 mbx_mem->msg_header = SCMI_MSG_CREATE(SCMI_SYS_PWR_PROTO_ID,
31 SCMI_SYS_PWR_STATE_SET_MSG, token);
32 mbx_mem->len = SCMI_SYS_PWR_STATE_SET_MSG_LEN;
33 mbx_mem->flags = SCMI_FLAG_RESP_POLL;
34 SCMI_PAYLOAD_ARG2(mbx_mem->payload, flags, system_state);
35
36 scmi_send_sync_command(ch);
37
38 /* Get the return values */
39 SCMI_PAYLOAD_RET_VAL1(mbx_mem->payload, ret);
40 assert(mbx_mem->len == SCMI_SYS_PWR_STATE_SET_RESP_LEN);
41 assert(token == SCMI_MSG_GET_TOKEN(mbx_mem->msg_header));
42
43 scmi_put_channel(ch);
44
45 return ret;
46 }
47
48 /*
49 * API to get the SCMI system power state
50 */
scmi_sys_pwr_state_get(void * p,uint32_t * system_state)51 int scmi_sys_pwr_state_get(void *p, uint32_t *system_state)
52 {
53 mailbox_mem_t *mbx_mem;
54 unsigned int token = 0;
55 int ret;
56 scmi_channel_t *ch = (scmi_channel_t *)p;
57
58 validate_scmi_channel(ch);
59
60 scmi_get_channel(ch);
61
62 mbx_mem = (mailbox_mem_t *)(ch->info->scmi_mbx_mem);
63 mbx_mem->msg_header = SCMI_MSG_CREATE(SCMI_SYS_PWR_PROTO_ID,
64 SCMI_SYS_PWR_STATE_GET_MSG, token);
65 mbx_mem->len = SCMI_SYS_PWR_STATE_GET_MSG_LEN;
66 mbx_mem->flags = SCMI_FLAG_RESP_POLL;
67
68 scmi_send_sync_command(ch);
69
70 /* Get the return values */
71 SCMI_PAYLOAD_RET_VAL2(mbx_mem->payload, ret, *system_state);
72 assert(mbx_mem->len == SCMI_SYS_PWR_STATE_GET_RESP_LEN);
73 assert(token == SCMI_MSG_GET_TOKEN(mbx_mem->msg_header));
74
75 scmi_put_channel(ch);
76
77 return ret;
78 }
79
