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/*
* Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
* Copyright (c) 2018, 2020, The Linux Foundation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <arch_helpers.h>
#include <bl31/bl31.h>
#include <common/debug.h>
#include <drivers/delay_timer.h>
#include <lib/mmio.h>
#include <lib/psci/psci.h>
#include <platform.h>
#include <platform_def.h>
#include <qti_cpu.h>
#include <qti_plat.h>
#include <qtiseclib_cb_interface.h>
#include <qtiseclib_defs_plat.h>
#include <qtiseclib_interface.h>
#define QTI_LOCAL_PSTATE_WIDTH 4
#define QTI_LOCAL_PSTATE_MASK ((1 << QTI_LOCAL_PSTATE_WIDTH) - 1)
/* Make composite power state parameter till level 0 */
#define qti_make_pwrstate_lvl0(lvl0_state, type) \
(((lvl0_state) << PSTATE_ID_SHIFT) | ((type) << PSTATE_TYPE_SHIFT))
/* Make composite power state parameter till level 1 */
#define qti_make_pwrstate_lvl1(lvl1_state, lvl0_state, type) \
(((lvl1_state) << QTI_LOCAL_PSTATE_WIDTH) | \
qti_make_pwrstate_lvl0(lvl0_state, type))
/* Make composite power state parameter till level 2 */
#define qti_make_pwrstate_lvl2(lvl2_state, lvl1_state, lvl0_state, type) \
(((lvl2_state) << (QTI_LOCAL_PSTATE_WIDTH * 2)) | \
qti_make_pwrstate_lvl1(lvl1_state, lvl0_state, type))
/* Make composite power state parameter till level 3 */
#define qti_make_pwrstate_lvl3(lvl3_state, lvl2_state, lvl1_state, lvl0_state, type) \
(((lvl3_state) << (QTI_LOCAL_PSTATE_WIDTH * 3)) | \
qti_make_pwrstate_lvl2(lvl2_state, lvl1_state, lvl0_state, type))
/* QTI_CORE_PWRDN_EN_MASK happens to be same across all CPUs */
#define QTI_CORE_PWRDN_EN_MASK 1
/* cpu power control happens to be same across all CPUs */
DEFINE_RENAME_SYSREG_RW_FUNCS(cpu_pwrctrl_val, S3_0_C15_C2_7)
const unsigned int qti_pm_idle_states[] = {
qti_make_pwrstate_lvl0(QTI_LOCAL_STATE_OFF,
PSTATE_TYPE_POWERDOWN),
qti_make_pwrstate_lvl0(QTI_LOCAL_STATE_DEEPOFF,
PSTATE_TYPE_POWERDOWN),
qti_make_pwrstate_lvl1(QTI_LOCAL_STATE_DEEPOFF,
QTI_LOCAL_STATE_DEEPOFF,
PSTATE_TYPE_POWERDOWN),
qti_make_pwrstate_lvl2(QTI_LOCAL_STATE_OFF,
QTI_LOCAL_STATE_DEEPOFF,
QTI_LOCAL_STATE_DEEPOFF,
PSTATE_TYPE_POWERDOWN),
qti_make_pwrstate_lvl3(QTI_LOCAL_STATE_OFF,
QTI_LOCAL_STATE_DEEPOFF,
QTI_LOCAL_STATE_DEEPOFF,
QTI_LOCAL_STATE_DEEPOFF,
PSTATE_TYPE_POWERDOWN),
0,
};
/*******************************************************************************
* QTI standard platform handler called to check the validity of the power
* state parameter. The power state parameter has to be a composite power
* state.
******************************************************************************/
int qti_validate_power_state(unsigned int power_state,
psci_power_state_t *req_state)
{
unsigned int state_id;
int i;
assert(req_state);
/*
* Currently we are using a linear search for finding the matching
* entry in the idle power state array. This can be made a binary
* search if the number of entries justify the additional complexity.
*/
for (i = 0; !!qti_pm_idle_states[i]; i++) {
if (power_state == qti_pm_idle_states[i])
break;
}
/* Return error if entry not found in the idle state array */
if (!qti_pm_idle_states[i])
return PSCI_E_INVALID_PARAMS;
i = 0;
state_id = psci_get_pstate_id(power_state);
/* Parse the State ID and populate the state info parameter */
while (state_id) {
req_state->pwr_domain_state[i++] = state_id &
QTI_LOCAL_PSTATE_MASK;
state_id >>= QTI_LOCAL_PSTATE_WIDTH;
}
return PSCI_E_SUCCESS;
}
/*******************************************************************************
* PLATFORM FUNCTIONS
******************************************************************************/
static void qti_set_cpupwrctlr_val(void)
{
unsigned long val;
val = read_cpu_pwrctrl_val();
val |= QTI_CORE_PWRDN_EN_MASK;
write_cpu_pwrctrl_val(val);
isb();
}
/**
* CPU power on function - ideally we want a wrapper since this function is
* target specific. But to unblock teams.
*/
static int qti_cpu_power_on(u_register_t mpidr)
{
int core_pos = plat_core_pos_by_mpidr(mpidr);
/* If not valid mpidr, return error */
if (core_pos < 0 || core_pos >= QTISECLIB_PLAT_CORE_COUNT) {
return PSCI_E_INVALID_PARAMS;
}
return qtiseclib_psci_node_power_on(mpidr);
}
static bool is_cpu_off(const psci_power_state_t *target_state)
{
if ((target_state->pwr_domain_state[QTI_PWR_LVL0] ==
QTI_LOCAL_STATE_OFF) ||
(target_state->pwr_domain_state[QTI_PWR_LVL0] ==
QTI_LOCAL_STATE_DEEPOFF)) {
return true;
} else {
return false;
}
}
static void qti_cpu_power_on_finish(const psci_power_state_t *target_state)
{
const uint8_t *pwr_states =
(const uint8_t *)target_state->pwr_domain_state;
qtiseclib_psci_node_on_finish(pwr_states);
if (is_cpu_off(target_state)) {
plat_qti_gic_cpuif_enable();
}
}
static void qti_cpu_standby(plat_local_state_t cpu_state)
{
}
static void qti_node_power_off(const psci_power_state_t *target_state)
{
qtiseclib_psci_node_power_off((const uint8_t *)
target_state->pwr_domain_state);
if (is_cpu_off(target_state)) {
plat_qti_gic_cpuif_disable();
qti_set_cpupwrctlr_val();
}
}
static void qti_node_suspend(const psci_power_state_t *target_state)
{
qtiseclib_psci_node_suspend((const uint8_t *)target_state->
pwr_domain_state);
if (is_cpu_off(target_state)) {
plat_qti_gic_cpuif_disable();
qti_set_cpupwrctlr_val();
}
}
static void qti_node_suspend_finish(const psci_power_state_t *target_state)
{
const uint8_t *pwr_states =
(const uint8_t *)target_state->pwr_domain_state;
qtiseclib_psci_node_suspend_finish(pwr_states);
if (is_cpu_off(target_state)) {
plat_qti_gic_cpuif_enable();
}
}
__dead2 void qti_domain_power_down_wfi(const psci_power_state_t *target_state)
{
/* For now just do WFI - add any target specific handling if needed */
psci_power_down_wfi();
/* We should never reach here */
}
static __dead2 void assert_ps_hold(void)
{
mmio_write_32(QTI_PS_HOLD_REG, 0);
mdelay(1000);
/* Should be dead before reaching this. */
panic();
}
__dead2 void qti_system_off(void)
{
qti_pmic_prepare_shutdown();
assert_ps_hold();
}
__dead2 void qti_system_reset(void)
{
qti_pmic_prepare_reset();
assert_ps_hold();
}
void qti_get_sys_suspend_power_state(psci_power_state_t *req_state)
{
int i = 0;
unsigned int state_id, power_state;
int size = ARRAY_SIZE(qti_pm_idle_states);
/*
* Find deepest state.
* The arm_pm_idle_states[] array has last element by default 0,
* so the real deepest state is second last element of that array.
*/
power_state = qti_pm_idle_states[size - 2];
state_id = psci_get_pstate_id(power_state);
/* Parse the State ID and populate the state info parameter */
while (state_id) {
req_state->pwr_domain_state[i++] =
state_id & QTI_LOCAL_PSTATE_MASK;
state_id >>= QTI_LOCAL_PSTATE_WIDTH;
}
}
/*
* Structure containing platform specific PSCI operations. Common
* PSCI layer will use this.
*/
const plat_psci_ops_t plat_qti_psci_pm_ops = {
.pwr_domain_on = qti_cpu_power_on,
.pwr_domain_on_finish = qti_cpu_power_on_finish,
.cpu_standby = qti_cpu_standby,
.pwr_domain_off = qti_node_power_off,
.pwr_domain_suspend = qti_node_suspend,
.pwr_domain_suspend_finish = qti_node_suspend_finish,
.pwr_domain_pwr_down_wfi = qti_domain_power_down_wfi,
.system_off = qti_system_off,
.system_reset = qti_system_reset,
.get_node_hw_state = NULL,
.translate_power_state_by_mpidr = NULL,
.get_sys_suspend_power_state = qti_get_sys_suspend_power_state,
.validate_power_state = qti_validate_power_state,
};
/**
* The QTI Standard platform definition of platform porting API
* `plat_setup_psci_ops`.
*/
int plat_setup_psci_ops(uintptr_t sec_entrypoint,
const plat_psci_ops_t **psci_ops)
{
int err;
err = qtiseclib_psci_init((uintptr_t)bl31_warm_entrypoint);
if (err == PSCI_E_SUCCESS) {
*psci_ops = &plat_qti_psci_pm_ops;
}
return err;
}