Commit fbb32695 authored by Tejas Patel's avatar Tejas Patel Committed by Jolly Shah
Browse files

xilinx: versal: Add support for suspend related APIs



Add support for below suspend related APIs.
- self_suspend
- abort_suspend
- request_suspend

Signed-off-by: default avatarTejas Patel <tejas.patel@xilinx.com>
Signed-off-by: default avatarJolly Shah <jolly.shah@xilinx.com>
Change-Id: If568e0cd33b64754fe66f66fc0cdd0ec62c1b32e
parent 95794c73
......@@ -105,6 +105,8 @@
#define FPD_APU_PWRCTL (FPD_APU_BASE + 0x90)
#define FPD_APU_CONFIG_0_VINITHI_SHIFT 8
#define APU_0_PWRCTL_CPUPWRDWNREQ_MASK 1
#define APU_1_PWRCTL_CPUPWRDWNREQ_MASK 2
/* IPI registers and bitfields */
#define IPI0_REG_BASE 0xFF330000
......
......@@ -11,6 +11,7 @@
#include <pm_common.h>
#include <pm_ipi.h>
#include <plat/common/platform.h>
#include "pm_api_sys.h"
#include "pm_client.h"
......@@ -27,6 +28,31 @@
pl[0] = (uint32_t)((uint32_t)((arg0) & 0xFF) | (mid << 8)); \
}
#define PM_PACK_PAYLOAD2(pl, mid, arg0, arg1) { \
pl[1] = (uint32_t)(arg1); \
PM_PACK_PAYLOAD1(pl, mid, arg0); \
}
#define PM_PACK_PAYLOAD3(pl, mid, arg0, arg1, arg2) { \
pl[2] = (uint32_t)(arg2); \
PM_PACK_PAYLOAD2(pl, mid, arg0, arg1); \
}
#define PM_PACK_PAYLOAD4(pl, mid, arg0, arg1, arg2, arg3) { \
pl[3] = (uint32_t)(arg3); \
PM_PACK_PAYLOAD3(pl, mid, arg0, arg1, arg2); \
}
#define PM_PACK_PAYLOAD5(pl, mid, arg0, arg1, arg2, arg3, arg4) { \
pl[4] = (uint32_t)(arg4); \
PM_PACK_PAYLOAD4(pl, mid, arg0, arg1, arg2, arg3); \
}
#define PM_PACK_PAYLOAD6(pl, mid, arg0, arg1, arg2, arg3, arg4, arg5) { \
pl[5] = (uint32_t)(arg5); \
PM_PACK_PAYLOAD5(pl, mid, arg0, arg1, arg2, arg3, arg4); \
}
/* PM API functions */
/**
......@@ -43,3 +69,92 @@ enum pm_ret_status pm_get_api_version(unsigned int *version)
PM_PACK_PAYLOAD1(payload, LIBPM_MODULE_ID, PM_GET_API_VERSION);
return pm_ipi_send_sync(primary_proc, payload, version, 1);
}
/**
* pm_self_suspend() - PM call for processor to suspend itself
* @nid Node id of the processor or subsystem
* @latency Requested maximum wakeup latency (not supported)
* @state Requested state
* @address Resume address
*
* This is a blocking call, it will return only once PMU has responded.
* On a wakeup, resume address will be automatically set by PMU.
*
* @return Returns status, either success or error+reason
*/
enum pm_ret_status pm_self_suspend(uint32_t nid,
unsigned int latency,
unsigned int state,
uintptr_t address)
{
uint32_t payload[PAYLOAD_ARG_CNT];
unsigned int cpuid = plat_my_core_pos();
const struct pm_proc *proc = pm_get_proc(cpuid);
if (!proc) {
WARN("Failed to get proc %d\n", cpuid);
return PM_RET_ERROR_INTERNAL;
}
/*
* Do client specific suspend operations
* (e.g. set powerdown request bit)
*/
pm_client_suspend(proc, state);
/* Send request to the PLM */
PM_PACK_PAYLOAD6(payload, LIBPM_MODULE_ID, PM_SELF_SUSPEND,
proc->node_id, latency, state, address,
(address >> 32));
return pm_ipi_send_sync(proc, payload, NULL, 0);
}
/**
* 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 PLM */
PM_PACK_PAYLOAD3(payload, LIBPM_MODULE_ID, PM_ABORT_SUSPEND, reason,
primary_proc->node_id);
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(uint32_t target, uint8_t ack,
unsigned int latency, unsigned int state)
{
uint32_t payload[PAYLOAD_ARG_CNT];
/* Send request to the PMU */
PM_PACK_PAYLOAD4(payload, LIBPM_MODULE_ID, PM_REQ_SUSPEND, target,
latency, state);
if (ack == IPI_BLOCKING)
return pm_ipi_send_sync(primary_proc, payload, NULL, 0);
else
return pm_ipi_send(primary_proc, payload);
}
......@@ -8,11 +8,21 @@
#define PM_API_SYS_H
#include <stdint.h>
#include "pm_defs.h"
/**********************************************************
* PM API function declarations
**********************************************************/
enum pm_ret_status pm_get_api_version(unsigned int *version);
enum pm_ret_status pm_self_suspend(uint32_t nid,
unsigned int latency,
unsigned int state,
uintptr_t address);
enum pm_ret_status pm_abort_suspend(enum pm_abort_reason reason);
enum pm_ret_status pm_req_suspend(uint32_t target,
uint8_t ack,
unsigned int latency,
unsigned int state);
#endif /* PM_API_SYS_H */
......@@ -13,6 +13,9 @@
#include <platform_def.h>
#include <versal_def.h>
#include <lib/bakery_lock.h>
#include <lib/mmio.h>
#include <drivers/arm/gicv3.h>
#include <plat/common/platform.h>
#include "pm_client.h"
DEFINE_BAKERY_LOCK(pm_client_secure_lock);
......@@ -28,11 +31,65 @@ static const struct pm_proc pm_procs_all[] = {
{
.node_id = XPM_DEVID_ACPU_0,
.ipi = &apu_ipi,
.pwrdn_mask = APU_0_PWRCTL_CPUPWRDWNREQ_MASK,
},
{
.node_id = XPM_DEVID_ACPU_1,
.ipi = &apu_ipi,
.pwrdn_mask = APU_1_PWRCTL_CPUPWRDWNREQ_MASK,
}
};
const struct pm_proc *primary_proc = &pm_procs_all[0];
/**
* pm_client_suspend() - Client-specific suspend actions
*
* This function should contain any PU-specific actions
* required prior to sending suspend request to PMU
* Actions taken depend on the state system is suspending to.
*/
void pm_client_suspend(const struct pm_proc *proc, unsigned int state)
{
bakery_lock_get(&pm_client_secure_lock);
/* Set powerdown request */
mmio_write_32(FPD_APU_PWRCTL, mmio_read_32(FPD_APU_PWRCTL) |
proc->pwrdn_mask);
bakery_lock_release(&pm_client_secure_lock);
}
/**
* pm_client_abort_suspend() - Client-specific abort-suspend actions
*
* This function should contain any PU-specific actions
* required for aborting a prior suspend request
*/
void pm_client_abort_suspend(void)
{
/* Enable interrupts at processor level (for current cpu) */
gicv3_cpuif_enable(plat_my_core_pos());
bakery_lock_get(&pm_client_secure_lock);
/* Clear powerdown request */
mmio_write_32(FPD_APU_PWRCTL, mmio_read_32(FPD_APU_PWRCTL) &
~primary_proc->pwrdn_mask);
bakery_lock_release(&pm_client_secure_lock);
}
/**
* pm_get_proc() - returns pointer to the proc structure
* @cpuid: id of the cpu whose proc struct pointer should be returned
*
* Return: pointer to a proc structure if proc is found, otherwise NULL
*/
const struct pm_proc *pm_get_proc(unsigned int cpuid)
{
if (cpuid < ARRAY_SIZE(pm_procs_all))
return &pm_procs_all[cpuid];
return NULL;
}
......@@ -15,6 +15,10 @@
#include "pm_common.h"
#include "pm_defs.h"
/* Functions to be implemented by each PU */
void pm_client_suspend(const struct pm_proc *proc, unsigned int state);
void pm_client_abort_suspend(void);
/* Global variables to be set in pm_client.c */
extern const struct pm_proc *primary_proc;
......
......@@ -24,11 +24,21 @@
/* PM API ids */
#define PM_GET_API_VERSION 1U
#define PM_REQ_SUSPEND 6U
#define PM_SELF_SUSPEND 7U
#define PM_ABORT_SUSPEND 9U
/*********************************************************************
* Enum definitions
********************************************************************/
enum pm_abort_reason {
ABORT_REASON_WKUP_EVENT = 100,
ABORT_REASON_PU_BUSY,
ABORT_REASON_NO_PWRDN,
ABORT_REASON_UNKNOWN,
};
/**
* @PM_RET_SUCCESS: success
* @PM_RET_ERROR_ARGS: illegal arguments provided (deprecated)
......
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