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/*
* Copyright (c) 2013-2016, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <arch_helpers.h>
#include <assert.h>
#include <console.h>
#include <errno.h>
#include <debug.h>
#include <psci.h>
#include <delay_timer.h>
#include <platform_def.h>
#include <plat_private.h>
/* Macros to read the rk power domain state */
#define RK_CORE_PWR_STATE(state) \
((state)->pwr_domain_state[MPIDR_AFFLVL0])
#define RK_CLUSTER_PWR_STATE(state) \
((state)->pwr_domain_state[MPIDR_AFFLVL1])
#define RK_SYSTEM_PWR_STATE(state) \
((state)->pwr_domain_state[PLAT_MAX_PWR_LVL])
static uintptr_t rockchip_sec_entrypoint;
static struct rockchip_pm_ops_cb *rockchip_ops;
/*******************************************************************************
* Rockchip standard platform handler called to check the validity of the power
* state parameter.
******************************************************************************/
int rockchip_validate_power_state(unsigned int power_state,
psci_power_state_t *req_state)
{
int pstate = psci_get_pstate_type(power_state);
int pwr_lvl = psci_get_pstate_pwrlvl(power_state);
int i;
assert(req_state);
if (pwr_lvl > PLAT_MAX_PWR_LVL)
return PSCI_E_INVALID_PARAMS;
/* Sanity check the requested state */
if (pstate == PSTATE_TYPE_STANDBY) {
/*
* It's probably to enter standby only on power level 0
* ignore any other power level.
*/
if (pwr_lvl != MPIDR_AFFLVL0)
return PSCI_E_INVALID_PARAMS;
req_state->pwr_domain_state[MPIDR_AFFLVL0] =
PLAT_MAX_RET_STATE;
} else {
for (i = MPIDR_AFFLVL0; i <= pwr_lvl; i++)
req_state->pwr_domain_state[i] =
PLAT_MAX_OFF_STATE;
for (i = (pwr_lvl + 1); i <= PLAT_MAX_PWR_LVL; i++)
req_state->pwr_domain_state[i] =
PLAT_MAX_RET_STATE;
}
/* We expect the 'state id' to be zero */
if (psci_get_pstate_id(power_state))
return PSCI_E_INVALID_PARAMS;
return PSCI_E_SUCCESS;
}
void rockchip_get_sys_suspend_power_state(psci_power_state_t *req_state)
{
int i;
for (i = MPIDR_AFFLVL0; i <= PLAT_MAX_PWR_LVL; i++)
req_state->pwr_domain_state[i] = PLAT_MAX_OFF_STATE;
}
/*******************************************************************************
* RockChip handler called when a CPU is about to enter standby.
******************************************************************************/
void rockchip_cpu_standby(plat_local_state_t cpu_state)
{
unsigned int scr;
assert(cpu_state == PLAT_MAX_RET_STATE);
scr = read_scr_el3();
/* Enable PhysicalIRQ bit for NS world to wake the CPU */
write_scr_el3(scr | SCR_IRQ_BIT);
isb();
dsb();
wfi();
/*
* Restore SCR to the original value, synchronisation of scr_el3 is
* done by eret while el3_exit to save some execution cycles.
*/
write_scr_el3(scr);
}
/*******************************************************************************
* RockChip handler called when a power domain is about to be turned on. The
* mpidr determines the CPU to be turned on.
******************************************************************************/
int rockchip_pwr_domain_on(u_register_t mpidr)
{
if (rockchip_ops && rockchip_ops->cores_pwr_dm_on)
rockchip_ops->cores_pwr_dm_on(mpidr, rockchip_sec_entrypoint);
return PSCI_E_SUCCESS;
}
/*******************************************************************************
* RockChip handler called when a power domain is about to be turned off. The
* target_state encodes the power state that each level should transition to.
******************************************************************************/
void rockchip_pwr_domain_off(const psci_power_state_t *target_state)
{
uint32_t lvl;
plat_local_state_t lvl_state;
assert(RK_CORE_PWR_STATE(target_state) == PLAT_MAX_OFF_STATE);
plat_rockchip_gic_cpuif_disable();
if (RK_CLUSTER_PWR_STATE(target_state) == PLAT_MAX_OFF_STATE)
plat_cci_disable();
if (!rockchip_ops || !rockchip_ops->cores_pwr_dm_off)
return;
rockchip_ops->cores_pwr_dm_off();
if (!rockchip_ops->hlvl_pwr_dm_off)
return;
for (lvl = MPIDR_AFFLVL1; lvl <= PLAT_MAX_PWR_LVL; lvl++) {
lvl_state = target_state->pwr_domain_state[lvl];
rockchip_ops->hlvl_pwr_dm_off(lvl, lvl_state);
}
}
/*******************************************************************************
* RockChip handler called when a power domain is about to be suspended. The
* target_state encodes the power state that each level should transition to.
******************************************************************************/
void rockchip_pwr_domain_suspend(const psci_power_state_t *target_state)
{
uint32_t lvl;
plat_local_state_t lvl_state;
if (RK_CORE_PWR_STATE(target_state) != PLAT_MAX_OFF_STATE)
return;
if (rockchip_ops) {
if (RK_SYSTEM_PWR_STATE(target_state) == PLAT_MAX_OFF_STATE &&
rockchip_ops->sys_pwr_dm_suspend) {
rockchip_ops->sys_pwr_dm_suspend();
} else if (rockchip_ops->cores_pwr_dm_suspend) {
rockchip_ops->cores_pwr_dm_suspend();
}
}
/* Prevent interrupts from spuriously waking up this cpu */
plat_rockchip_gic_cpuif_disable();
/* Perform the common cluster specific operations */
if (RK_CLUSTER_PWR_STATE(target_state) == PLAT_MAX_OFF_STATE)
plat_cci_disable();
if (RK_SYSTEM_PWR_STATE(target_state) == PLAT_MAX_OFF_STATE)
return;
if (!rockchip_ops || !rockchip_ops->hlvl_pwr_dm_suspend)
return;
for (lvl = MPIDR_AFFLVL1; lvl <= PLAT_MAX_PWR_LVL; lvl++) {
lvl_state = target_state->pwr_domain_state[lvl];
rockchip_ops->hlvl_pwr_dm_suspend(lvl, lvl_state);
}
}
/*******************************************************************************
* RockChip handler called when a power domain has just been powered on after
* being turned off earlier. The target_state encodes the low power state that
* each level has woken up from.
******************************************************************************/
void rockchip_pwr_domain_on_finish(const psci_power_state_t *target_state)
{
uint32_t lvl;
plat_local_state_t lvl_state;
assert(RK_CORE_PWR_STATE(target_state) == PLAT_MAX_OFF_STATE);
if (!rockchip_ops)
goto comm_finish;
if (rockchip_ops->hlvl_pwr_dm_on_finish) {
for (lvl = MPIDR_AFFLVL1; lvl <= PLAT_MAX_PWR_LVL; lvl++) {
lvl_state = target_state->pwr_domain_state[lvl];
rockchip_ops->hlvl_pwr_dm_on_finish(lvl, lvl_state);
}
}
if (rockchip_ops->cores_pwr_dm_on_finish)
rockchip_ops->cores_pwr_dm_on_finish();
comm_finish:
/* Perform the common cluster specific operations */
if (RK_CLUSTER_PWR_STATE(target_state) == PLAT_MAX_OFF_STATE) {
/* Enable coherency if this cluster was off */
plat_cci_enable();
}
/* Enable the gic cpu interface */
plat_rockchip_gic_pcpu_init();
/* Program the gic per-cpu distributor or re-distributor interface */
plat_rockchip_gic_cpuif_enable();
}
/*******************************************************************************
* RockChip handler called when a power domain has just been powered on after
* having been suspended earlier. The target_state encodes the low power state
* that each level has woken up from.
* TODO: At the moment we reuse the on finisher and reinitialize the secure
* context. Need to implement a separate suspend finisher.
******************************************************************************/
void rockchip_pwr_domain_suspend_finish(const psci_power_state_t *target_state)
{
uint32_t lvl;
plat_local_state_t lvl_state;
/* Nothing to be done on waking up from retention from CPU level */
if (RK_CORE_PWR_STATE(target_state) != PLAT_MAX_OFF_STATE)
return;
/* Perform system domain restore if woken up from system suspend */
if (!rockchip_ops)
goto comm_finish;
if (RK_SYSTEM_PWR_STATE(target_state) == PLAT_MAX_OFF_STATE) {
if (rockchip_ops->sys_pwr_dm_resume)
rockchip_ops->sys_pwr_dm_resume();
goto comm_finish;
}
if (rockchip_ops->hlvl_pwr_dm_resume) {
for (lvl = MPIDR_AFFLVL1; lvl <= PLAT_MAX_PWR_LVL; lvl++) {
lvl_state = target_state->pwr_domain_state[lvl];
rockchip_ops->hlvl_pwr_dm_resume(lvl, lvl_state);
}
}
if (rockchip_ops->cores_pwr_dm_resume)
rockchip_ops->cores_pwr_dm_resume();
/*
* Program the gic per-cpu distributor or re-distributor interface.
* For sys power domain operation, resuming of the gic needs to operate
* in rockchip_ops->sys_pwr_dm_resume, according to the sys power mode
* implements.
*/
plat_rockchip_gic_cpuif_enable();
comm_finish:
/* Perform the common cluster specific operations */
if (RK_CLUSTER_PWR_STATE(target_state) == PLAT_MAX_OFF_STATE) {
/* Enable coherency if this cluster was off */
plat_cci_enable();
}
}
/*******************************************************************************
* RockChip handlers to reboot the system
******************************************************************************/
static void __dead2 rockchip_system_reset(void)
{
assert(rockchip_ops && rockchip_ops->sys_gbl_soft_reset);
rockchip_ops->sys_gbl_soft_reset();
}
/*******************************************************************************
* RockChip handlers to power off the system
******************************************************************************/
static void __dead2 rockchip_system_poweroff(void)
{
assert(rockchip_ops && rockchip_ops->system_off);
rockchip_ops->system_off();
}
/*******************************************************************************
* Export the platform handlers via plat_rockchip_psci_pm_ops. The rockchip
* standard
* platform layer will take care of registering the handlers with PSCI.
******************************************************************************/
const plat_psci_ops_t plat_rockchip_psci_pm_ops = {
.cpu_standby = rockchip_cpu_standby,
.pwr_domain_on = rockchip_pwr_domain_on,
.pwr_domain_off = rockchip_pwr_domain_off,
.pwr_domain_suspend = rockchip_pwr_domain_suspend,
.pwr_domain_on_finish = rockchip_pwr_domain_on_finish,
.pwr_domain_suspend_finish = rockchip_pwr_domain_suspend_finish,
.system_reset = rockchip_system_reset,
.system_off = rockchip_system_poweroff,
.validate_power_state = rockchip_validate_power_state,
.get_sys_suspend_power_state = rockchip_get_sys_suspend_power_state
};
int plat_setup_psci_ops(uintptr_t sec_entrypoint,
const plat_psci_ops_t **psci_ops)
{
*psci_ops = &plat_rockchip_psci_pm_ops;
rockchip_sec_entrypoint = sec_entrypoint;
return 0;
}
uintptr_t plat_get_sec_entrypoint(void)
{
assert(rockchip_sec_entrypoint);
return rockchip_sec_entrypoint;
}
void plat_setup_rockchip_pm_ops(struct rockchip_pm_ops_cb *ops)
{
rockchip_ops = ops;
}