1 /*
2  * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
3  *
4  * SPDX-License-Identifier: BSD-3-Clause
5  */
6 
7 #include <stdbool.h>
8 
9 #include <arch.h>
10 #include <arch_helpers.h>
11 #include <common/debug.h>
12 
13 #include <plat_imx8.h>
14 #include <sci/sci.h>
15 
imx_system_off(void)16 void __dead2 imx_system_off(void)
17 {
18 	sc_pm_set_sys_power_mode(ipc_handle, SC_PM_PW_MODE_OFF);
19 	wfi();
20 	ERROR("power off failed.\n");
21 	panic();
22 }
23 
imx_system_reset(void)24 void __dead2 imx_system_reset(void)
25 {
26 	sc_pm_reset(ipc_handle, SC_PM_RESET_TYPE_BOARD);
27 	wfi();
28 	ERROR("system reset failed.\n");
29 	panic();
30 }
31 
imx_validate_power_state(unsigned int power_state,psci_power_state_t * req_state)32 int imx_validate_power_state(unsigned int power_state,
33 			 psci_power_state_t *req_state)
34 {
35 	int pwr_lvl = psci_get_pstate_pwrlvl(power_state);
36 	int pwr_type = psci_get_pstate_type(power_state);
37 	int state_id = psci_get_pstate_id(power_state);
38 
39 	if (pwr_lvl > PLAT_MAX_PWR_LVL)
40 		return PSCI_E_INVALID_PARAMS;
41 
42 	if (pwr_type == PSTATE_TYPE_POWERDOWN) {
43 		req_state->pwr_domain_state[MPIDR_AFFLVL0] = PLAT_MAX_OFF_STATE;
44 		if (!state_id)
45 			req_state->pwr_domain_state[MPIDR_AFFLVL1] = PLAT_MAX_RET_STATE;
46 		else
47 			req_state->pwr_domain_state[MPIDR_AFFLVL1] = PLAT_MAX_OFF_STATE;
48 	}
49 
50 	return PSCI_E_SUCCESS;
51 }
52 
imx_get_sys_suspend_power_state(psci_power_state_t * req_state)53 void imx_get_sys_suspend_power_state(psci_power_state_t *req_state)
54 {
55 	unsigned int i;
56 
57 	/* CPU & cluster off, system in retention */
58 	for (i = MPIDR_AFFLVL0; i < PLAT_MAX_PWR_LVL; i++)
59 		req_state->pwr_domain_state[i] = PLAT_MAX_OFF_STATE;
60 	req_state->pwr_domain_state[PLAT_MAX_PWR_LVL] = PLAT_MAX_RET_STATE;
61 }
62 
63