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zynqmp: pm: Call set_wakeup_source for all wake devices on sys-suspend 

During system suspend, identify slaves which are configured
as wake sources and call pm_set_wakeup_source API for each of them.

Identifying if device may wake the system is done by checking if any
interrupt of that device is enabled in GICD_ISENABLER when the APU is
about to enter SUSPEND_TO_RAM state. If such interrupt is found,
pm_set_wakeup_source is called with corresponding PM node ID as
argument.

Signed-off-by: Filip Drazic <filip.drazic@aggios.com>
This commit is contained in:
Filip Drazic 2016-07-26 12:11:33 +02:00 committed by Soren Brinkmann
parent 6aa4c533b8
commit b516b7dc5d
4 changed files with 155 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
plat/xilinx/zynqmp/pm_service/pm_api_sys.c
View File

@ -97,7 +97,7 @@ enum pm_ret_status pm_self_suspend(enum pm_node_id nid,
* Do client specific suspend operations
* (e.g. set powerdown request bit)
*/
pm_client_suspend(proc);
pm_client_suspend(proc, state);
/* Send request to the PMU */
PM_PACK_PAYLOAD6(payload, PM_SELF_SUSPEND, proc->node_id, latency,
state, address, (address >> 32));

153
plat/xilinx/zynqmp/pm_service/pm_client.c
View File

@ -33,16 +33,21 @@
* for getting information about and changing state of the APU.
*/
#include <assert.h>
#include <bakery_lock.h>
#include <gicv2.h>
#include <gic_common.h>
#include <bl_common.h>
#include <mmio.h>
#include <string.h>
#include <utils.h>
#include "pm_api_sys.h"
#include "pm_client.h"
#include "pm_ipi.h"
#include "../zynqmp_def.h"
#define IRQ_MAX 84
#define NUM_GICD_ISENABLER ((IRQ_MAX >> 5) + 1)
#define UNDEFINED_CPUID (~0)
DEFINE_BAKERY_LOCK(pm_client_secure_lock);
@ -73,6 +78,148 @@ static const struct pm_proc const pm_procs_all[] = {
},
};
/* Interrupt to PM node ID map */
static enum pm_node_id irq_node_map[IRQ_MAX + 1] = {
NODE_UNKNOWN,
NODE_UNKNOWN,
NODE_UNKNOWN,
NODE_UNKNOWN, /* 3 */
NODE_UNKNOWN,
NODE_UNKNOWN,
NODE_UNKNOWN,
NODE_UNKNOWN, /* 7 */
NODE_UNKNOWN,
NODE_UNKNOWN,
NODE_UNKNOWN,
NODE_UNKNOWN, /* 11 */
NODE_UNKNOWN,
NODE_UNKNOWN,
NODE_NAND,
NODE_QSPI, /* 15 */
NODE_GPIO,
NODE_I2C_0,
NODE_I2C_1,
NODE_SPI_0, /* 19 */
NODE_SPI_1,
NODE_UART_0,
NODE_UART_1,
NODE_CAN_0, /* 23 */
NODE_CAN_1,
NODE_UNKNOWN,
NODE_RTC,
NODE_RTC, /* 27 */
NODE_UNKNOWN,
NODE_UNKNOWN,
NODE_UNKNOWN,
NODE_UNKNOWN, /* 31 */
NODE_UNKNOWN,
NODE_UNKNOWN,
NODE_UNKNOWN,
NODE_UNKNOWN, /* 35, NODE_IPI_APU */
NODE_TTC_0,
NODE_TTC_0,
NODE_TTC_0,
NODE_TTC_1, /* 39 */
NODE_TTC_1,
NODE_TTC_1,
NODE_TTC_2,
NODE_TTC_2, /* 43 */
NODE_TTC_2,
NODE_TTC_3,
NODE_TTC_3,
NODE_TTC_3, /* 47 */
NODE_SD_0,
NODE_SD_1,
NODE_SD_0,
NODE_SD_1, /* 51 */
NODE_UNKNOWN,
NODE_UNKNOWN,
NODE_UNKNOWN,
NODE_UNKNOWN, /* 55 */
NODE_UNKNOWN,
NODE_ETH_0,
NODE_ETH_0,
NODE_ETH_1, /* 59 */
NODE_ETH_1,
NODE_ETH_2,
NODE_ETH_2,
NODE_ETH_3, /* 63 */
NODE_ETH_3,
NODE_USB_0,
NODE_USB_0,
NODE_USB_0, /* 67 */
NODE_USB_0,
NODE_USB_0,
NODE_USB_1,
NODE_USB_1, /* 71 */
NODE_USB_1,
NODE_USB_1,
NODE_USB_1,
NODE_USB_0, /* 75 */
NODE_USB_0,
NODE_ADMA,
NODE_ADMA,
NODE_ADMA, /* 79 */
NODE_ADMA,
NODE_ADMA,
NODE_ADMA,
NODE_ADMA, /* 83 */
NODE_ADMA,
};
/**
* irq_to_pm_node - Get PM node ID corresponding to the interrupt number
* @irq: Interrupt number
*
* Return: PM node ID corresponding to the specified interrupt
*/
static enum pm_node_id irq_to_pm_node(unsigned int irq)
{
assert(irq <= IRQ_MAX);
return irq_node_map[irq];
}
/**
* pm_client_set_wakeup_sources - Set all slaves with enabled interrupts as wake
* sources in the PMU firmware
*/
static void pm_client_set_wakeup_sources(void)
{
uint32_t reg_num;
uint8_t pm_wakeup_nodes_set[NODE_MAX];
uintptr_t isenabler1 = BASE_GICD_BASE + GICD_ISENABLER + 4;
memset(&pm_wakeup_nodes_set, 0, sizeof(pm_wakeup_nodes_set));
for (reg_num = 0; reg_num < NUM_GICD_ISENABLER; reg_num++) {
uint32_t base_irq = reg_num << ISENABLER_SHIFT;
uint32_t reg = mmio_read_32(isenabler1 + (reg_num << 2));
if (!reg)
continue;
while (reg) {
enum pm_node_id node;
uint32_t idx, ret, irq, lowest_set = reg & (-reg);
idx = __builtin_ctz(lowest_set);
irq = base_irq + idx;
if (irq > IRQ_MAX)
break;
node = irq_to_pm_node(irq);
reg &= ~lowest_set;
if ((node != NODE_UNKNOWN) &&
(!pm_wakeup_nodes_set[node])) {
ret = pm_set_wakeup_source(NODE_APU, node, 1);
pm_wakeup_nodes_set[node] = !ret;
}
}
}
}
/**
* pm_get_proc() - returns pointer to the proc structure
* @cpuid: id of the cpu whose proc struct pointer should be returned
@ -124,11 +271,15 @@ const struct pm_proc *primary_proc = &pm_procs_all[0];
*
* 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)
void pm_client_suspend(const struct pm_proc *proc, unsigned int state)
{
bakery_lock_get(&pm_client_secure_lock);
if (state == PM_STATE_SUSPEND_TO_RAM)
pm_client_set_wakeup_sources();
/* Set powerdown request */
mmio_write_32(APU_PWRCTL, mmio_read_32(APU_PWRCTL) | proc->pwrdn_mask);

2
plat/xilinx/zynqmp/pm_service/pm_client.h
View File

@ -40,7 +40,7 @@
#include "pm_common.h"
/* Functions to be implemented by each PU */
void pm_client_suspend(const struct pm_proc *proc);
void pm_client_suspend(const struct pm_proc *proc, unsigned int state);
void pm_client_abort_suspend(void);
void pm_client_wakeup(const struct pm_proc *proc);
enum pm_ret_status set_ocm_retention(void);

1
plat/xilinx/zynqmp/pm_service/pm_defs.h
View File

@ -152,6 +152,7 @@ enum pm_node_id {
NODE_PCIE,
NODE_PCAP,
NODE_RTC,
NODE_MAX
};
enum pm_request_ack {