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>
diff --git a/plat/xilinx/zynqmp/pm_service/pm_api_sys.c b/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
index f78a311..52d9171 100644
--- a/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
+++ b/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
@@ -97,7 +97,7 @@
* 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));
diff --git a/plat/xilinx/zynqmp/pm_service/pm_client.c b/plat/xilinx/zynqmp/pm_service/pm_client.c
index f0b34cb..b77a1cf 100644
--- a/plat/xilinx/zynqmp/pm_service/pm_client.c
+++ b/plat/xilinx/zynqmp/pm_service/pm_client.c
@@ -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 @@
},
};
+/* 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 @@
*
* 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);
diff --git a/plat/xilinx/zynqmp/pm_service/pm_client.h b/plat/xilinx/zynqmp/pm_service/pm_client.h
index 9483b0d..7f80d5b 100644
--- a/plat/xilinx/zynqmp/pm_service/pm_client.h
+++ b/plat/xilinx/zynqmp/pm_service/pm_client.h
@@ -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);
diff --git a/plat/xilinx/zynqmp/pm_service/pm_defs.h b/plat/xilinx/zynqmp/pm_service/pm_defs.h
index 90d7d3a..db44785 100644
--- a/plat/xilinx/zynqmp/pm_service/pm_defs.h
+++ b/plat/xilinx/zynqmp/pm_service/pm_defs.h
@@ -152,6 +152,7 @@
NODE_PCIE,
NODE_PCAP,
NODE_RTC,
+ NODE_MAX
};
enum pm_request_ack {