/**
* pm_req_wakeup() - PM call for processor to wake up selected processor
* or subsystem
* @target Node id of the processor or subsystem to wake up
* @ack Flag to specify whether acknowledge requested
* @set_address Resume address presence indicator
* 1 resume address specified, 0 otherwise
* @address Resume address
*
* This API function is either used to power up another APU core for SMP
* (by PSCI) or to power up an entirely different PU or subsystem, such
* as RPU0, RPU, or PL_CORE_xx. Resume address for the target PU will be
* automatically set by PMU.
*
* @return Returns status, either success or error+reason
*/
enum pm_ret_status pm_req_wakeup(enum pm_node_id target,
unsigned int set_address,
uintptr_t address,
enum pm_request_ack ack)
{
uint32_t payload[PAYLOAD_ARG_CNT];
uint64_t encoded_address;
const struct pm_proc *proc = pm_get_proc_by_node(target);
/* invoke APU-specific code for waking up another APU core */
pm_client_wakeup(proc);
/* encode set Address into 1st bit of address */
encoded_address = address;
encoded_address |= !!set_address;
/* Send request to the PMU to perform the wake of the PU */
PM_PACK_PAYLOAD5(payload, PM_REQ_WAKEUP, target, encoded_address,
encoded_address >> 32, ack);
if (ack == REQ_ACK_BLOCKING)
return pm_ipi_send_sync(primary_proc, payload, NULL);
else
return pm_ipi_send(primary_proc, payload);
}
/**
* pm_release_node() - PM call to release a node
* @nid Node id of the slave
*
* @return Returns status, either success or error+reason
*/
enum pm_ret_status pm_release_node(enum pm_node_id nid)
{
uint32_t payload[PAYLOAD_ARG_CNT];
PM_PACK_PAYLOAD2(payload, PM_RELEASE_NODE, nid);
return pm_ipi_send(primary_proc, payload);
}
/**
* pm_system_shutdown() - PM call to request a system shutdown or restart
* @restart Shutdown or restart? 0 for shutdown, 1 for restart
*
* @return Returns status, either success or error+reason
*/
enum pm_ret_status pm_system_shutdown(unsigned int restart)
{
uint32_t payload[PAYLOAD_ARG_CNT];
PM_PACK_PAYLOAD2(payload, PM_SYSTEM_SHUTDOWN, restart);
return pm_ipi_send(primary_proc, payload);
}
/**
* pm_get_node_status() - PM call to request a node's current power state
* @nid Node id of the slave
*
* @return Returns status, either success or error+reason
*/
enum pm_ret_status pm_get_node_status(enum pm_node_id nid)
{
/* TODO: Add power state argument!! */
uint32_t payload[PAYLOAD_ARG_CNT];
PM_PACK_PAYLOAD2(payload, PM_GET_NODE_STATUS, nid);
return pm_ipi_send(primary_proc, payload);
}
/**
* pm_set_max_latency() - PM call to set wakeup latency requirements
* @nid Node id of the slave
* @latency Requested maximum wakeup latency
*
* @return Returns status, either success or error+reason
*/
enum pm_ret_status pm_set_max_latency(enum pm_node_id nid,
unsigned int latency)
{
uint32_t payload[PAYLOAD_ARG_CNT];
PM_PACK_PAYLOAD3(payload, PM_SET_MAX_LATENCY, nid, latency);
return pm_ipi_send(primary_proc, payload);
}
/**
* pm_reset_assert() - Assert reset
* @reset Reset ID
* @assert Assert (1) or de-assert (0)
*
* @return Returns status, either success or error+reason
*/
enum pm_ret_status pm_reset_assert(unsigned int reset,
unsigned int assert)
{
uint32_t payload[PAYLOAD_ARG_CNT];
/* Send request to the PMU */
PM_PACK_PAYLOAD3(payload, PM_RESET_ASSERT, reset, assert);
return pm_ipi_send(primary_proc, payload);
}
/**
* pm_set_wakeup_source() - PM call to specify the wakeup source while suspended
* @target Node id of the targeted PU or subsystem
* @wkup_node Node id of the wakeup peripheral
* @enable Enable or disable the specified peripheral as wake source
*
* @return Returns status, either success or error+reason
*/
enum pm_ret_status pm_set_wakeup_source(const enum pm_node_id target,
const enum pm_node_id wkup_node,
const uint8_t enable)
{
uint32_t payload[PAYLOAD_ARG_CNT];
PM_PACK_PAYLOAD4(payload, PM_SET_WAKEUP_SOURCE, target, wkup_node,
enable);
return pm_ipi_send(primary_proc, payload);
}
/**
* pm_mmio_write() - Perform write to protected mmio
* @address Address to write to
* @mask Mask to apply
* @value Value to write
*
* This function provides access to PM-related control registers
* that may not be directly accessible by a particular PU.
*
* @return Returns status, either success or error+reason
*/
enum pm_ret_status pm_mmio_write(uintptr_t address,
unsigned int mask,
unsigned int value)
{
uint32_t payload[PAYLOAD_ARG_CNT];
/* Send request to the PMU */
PM_PACK_PAYLOAD4(payload, PM_MMIO_WRITE, address, mask, value);
return pm_ipi_send(primary_proc, payload);
}
/**
* pm_force_powerdown() - PM call to request for another PU or subsystem to
* be powered down forcefully
* @target Node id of the targeted PU or subsystem
* @ack Flag to specify whether acknowledge is requested
*
* @return Returns status, either success or error+reason
*/
enum pm_ret_status pm_force_powerdown(enum pm_node_id target,
enum pm_request_ack ack)
{
uint32_t payload[PAYLOAD_ARG_CNT];
/* Send request to the PMU */
PM_PACK_PAYLOAD3(payload, PM_FORCE_POWERDOWN, target, ack);
if (ack == REQ_ACK_BLOCKING)
return pm_ipi_send_sync(primary_proc, payload, NULL);
else
return pm_ipi_send(primary_proc, payload);
}
/**
* pm_req_suspend() - PM call to request for another PU or subsystem to
* be suspended gracefully.
* @target Node id of the targeted PU or subsystem
* @ack Flag to specify whether acknowledge is requested
* @latency Requested wakeup latency (not supported)
* @state Requested state (not supported)
*
* @return Returns status, either success or error+reason
*/
enum pm_ret_status pm_req_suspend(enum pm_node_id target,
enum pm_request_ack ack,
unsigned int latency, unsigned int state)
{
uint32_t payload[PAYLOAD_ARG_CNT];
/* Send request to the PMU */
PM_PACK_PAYLOAD5(payload, PM_REQ_SUSPEND, target, ack, latency, state);
if (ack == REQ_ACK_BLOCKING)
return pm_ipi_send_sync(primary_proc, payload, NULL);
else
return pm_ipi_send(primary_proc, payload);
}
/**
* pm_req_node() - PM call to request a node with specific capabilities
* @nid Node id of the slave
* @capabilities Requested capabilities of the slave
* @qos Quality of service (not supported)
* @ack Flag to specify whether acknowledge is requested
*
* @return Returns status, either success or error+reason
*/
enum pm_ret_status pm_req_node(enum pm_node_id nid,
unsigned int capabilities,
unsigned int qos,
enum pm_request_ack ack)
{
uint32_t payload[PAYLOAD_ARG_CNT];
PM_PACK_PAYLOAD5(payload, PM_REQ_NODE, nid, capabilities, qos, ack);
if (ack == REQ_ACK_BLOCKING)
return pm_ipi_send_sync(primary_proc, payload, NULL);
else
return pm_ipi_send(primary_proc, payload);
}
/**
* pm_abort_suspend() - PM call to announce that a prior suspend request
* is to be aborted.
* @reason Reason for the abort
*
* Calling PU expects the PMU to abort the initiated suspend procedure.
* This is a non-blocking call without any acknowledge.
*
* @return Returns status, either success or error+reason
*/
enum pm_ret_status pm_abort_suspend(enum pm_abort_reason reason)
{
uint32_t payload[PAYLOAD_ARG_CNT];
/*
* Do client specific abort suspend operations
* (e.g. enable interrupts and clear powerdown request bit)
*/
pm_client_abort_suspend();
/* Send request to the PMU */
/* TODO: allow passing the node ID of the affected CPU */
PM_PACK_PAYLOAD3(payload, PM_ABORT_SUSPEND, reason,
primary_proc->node_id);
return pm_ipi_send(primary_proc, payload);
}
/**
* pm_set_requirement() - PM call to set requirement for PM slaves
* @nid Node id of the slave
* @capabilities Requested capabilities of the slave
* @qos Quality of service (not supported)
* @ack Flag to specify whether acknowledge is requested
*
* This API function is to be used for slaves a PU already has requested
*
* @return Returns status, either success or error+reason
*/
enum pm_ret_status pm_set_requirement(const enum pm_node_id nid,
const uint32_t capabilities,
const uint32_t qos,
const enum pm_request_ack ack)
{
uint32_t payload[PAYLOAD_ARG_CNT];
PM_PACK_PAYLOAD5(payload, PM_SET_REQUIREMENT, nid, capabilities, qos,
ack);
if (REQ_ACK_BLOCKING == ack)
return pm_ipi_send_sync(primary_proc, payload, NULL);
else
return pm_ipi_send(primary_proc, payload);
}