aboutsummaryrefslogtreecommitdiff
path: root/plat/allwinner/common/sunxi_pm.c
diff options
context:
space:
mode:
Diffstat (limited to 'plat/allwinner/common/sunxi_pm.c')
-rw-r--r--plat/allwinner/common/sunxi_pm.c242
1 files changed, 5 insertions, 237 deletions
diff --git a/plat/allwinner/common/sunxi_pm.c b/plat/allwinner/common/sunxi_pm.c
index aa80c528b9..eb1b7e7b85 100644
--- a/plat/allwinner/common/sunxi_pm.c
+++ b/plat/allwinner/common/sunxi_pm.c
@@ -8,203 +8,14 @@
#include <platform_def.h>
-#include <arch_helpers.h>
#include <common/debug.h>
-#include <drivers/arm/css/css_scpi.h>
-#include <drivers/arm/gicv2.h>
-#include <drivers/delay_timer.h>
#include <lib/mmio.h>
#include <lib/psci/psci.h>
-#include <plat/common/platform.h>
#include <sunxi_cpucfg.h>
-#include <sunxi_def.h>
-#include <sunxi_mmap.h>
#include <sunxi_private.h>
-#define SUNXI_WDOG0_CTRL_REG (SUNXI_R_WDOG_BASE + 0x0010)
-#define SUNXI_WDOG0_CFG_REG (SUNXI_R_WDOG_BASE + 0x0014)
-#define SUNXI_WDOG0_MODE_REG (SUNXI_R_WDOG_BASE + 0x0018)
-
-#define CPU_PWR_LVL MPIDR_AFFLVL0
-#define CLUSTER_PWR_LVL MPIDR_AFFLVL1
-#define SYSTEM_PWR_LVL MPIDR_AFFLVL2
-
-#define CPU_PWR_STATE(state) \
- ((state)->pwr_domain_state[CPU_PWR_LVL])
-#define CLUSTER_PWR_STATE(state) \
- ((state)->pwr_domain_state[CLUSTER_PWR_LVL])
-#define SYSTEM_PWR_STATE(state) \
- ((state)->pwr_domain_state[SYSTEM_PWR_LVL])
-
-/*
- * The addresses for the SCP exception vectors are defined in the or1k
- * architecture specification.
- */
-#define OR1K_VEC_FIRST 0x01
-#define OR1K_VEC_LAST 0x0e
-#define OR1K_VEC_ADDR(n) (0x100 * (n))
-
-/*
- * This magic value is the little-endian representation of the or1k
- * instruction "l.mfspr r2, r0, 0x12", which is guaranteed to be the
- * first instruction in the SCP firmware.
- */
-#define SCP_FIRMWARE_MAGIC 0xb4400012
-
-static bool scpi_available;
-
-static inline scpi_power_state_t scpi_map_state(plat_local_state_t psci_state)
-{
- if (is_local_state_run(psci_state))
- return scpi_power_on;
- if (is_local_state_retn(psci_state))
- return scpi_power_retention;
- return scpi_power_off;
-}
-
-static void sunxi_cpu_standby(plat_local_state_t cpu_state)
-{
- u_register_t scr = read_scr_el3();
-
- assert(is_local_state_retn(cpu_state));
-
- write_scr_el3(scr | SCR_IRQ_BIT);
- wfi();
- write_scr_el3(scr);
-}
-
-static int sunxi_pwr_domain_on(u_register_t mpidr)
-{
- if (scpi_available) {
- scpi_set_css_power_state(mpidr,
- scpi_power_on,
- scpi_power_on,
- scpi_power_on);
- } else {
- sunxi_cpu_on(mpidr);
- }
-
- return PSCI_E_SUCCESS;
-}
-
-static void sunxi_pwr_domain_off(const psci_power_state_t *target_state)
-{
- plat_local_state_t cpu_pwr_state = CPU_PWR_STATE(target_state);
- plat_local_state_t cluster_pwr_state = CLUSTER_PWR_STATE(target_state);
- plat_local_state_t system_pwr_state = SYSTEM_PWR_STATE(target_state);
-
- if (is_local_state_off(cpu_pwr_state))
- gicv2_cpuif_disable();
-
- if (scpi_available) {
- scpi_set_css_power_state(read_mpidr(),
- scpi_map_state(cpu_pwr_state),
- scpi_map_state(cluster_pwr_state),
- scpi_map_state(system_pwr_state));
- }
-}
-
-static void __dead2 sunxi_pwr_down_wfi(const psci_power_state_t *target_state)
-{
- sunxi_cpu_off(read_mpidr());
-
- while (1)
- wfi();
-}
-
-static void sunxi_pwr_domain_on_finish(const psci_power_state_t *target_state)
-{
- if (is_local_state_off(SYSTEM_PWR_STATE(target_state)))
- gicv2_distif_init();
- if (is_local_state_off(CPU_PWR_STATE(target_state))) {
- gicv2_pcpu_distif_init();
- gicv2_cpuif_enable();
- }
-}
-
-static void __dead2 sunxi_system_off(void)
-{
- gicv2_cpuif_disable();
-
- if (scpi_available) {
- /* Send the power down request to the SCP */
- uint32_t ret = scpi_sys_power_state(scpi_system_shutdown);
-
- if (ret != SCP_OK)
- ERROR("PSCI: SCPI %s failed: %d\n", "shutdown", ret);
- }
-
- /* Turn off all secondary CPUs */
- sunxi_disable_secondary_cpus(read_mpidr());
-
- sunxi_power_down();
-
- udelay(1000);
- ERROR("PSCI: Cannot turn off system, halting\n");
- wfi();
- panic();
-}
-
-static void __dead2 sunxi_system_reset(void)
-{
- gicv2_cpuif_disable();
-
- if (scpi_available) {
- /* Send the system reset request to the SCP */
- uint32_t ret = scpi_sys_power_state(scpi_system_reboot);
-
- if (ret != SCP_OK)
- ERROR("PSCI: SCPI %s failed: %d\n", "reboot", ret);
- }
-
- /* Reset the whole system when the watchdog times out */
- mmio_write_32(SUNXI_WDOG0_CFG_REG, 1);
- /* Enable the watchdog with the shortest timeout (0.5 seconds) */
- mmio_write_32(SUNXI_WDOG0_MODE_REG, (0 << 4) | 1);
- /* Wait for twice the watchdog timeout before panicking */
- mdelay(1000);
-
- ERROR("PSCI: System reset failed\n");
- wfi();
- panic();
-}
-
-static int sunxi_validate_power_state(unsigned int power_state,
- psci_power_state_t *req_state)
-{
- unsigned int power_level = psci_get_pstate_pwrlvl(power_state);
- unsigned int type = psci_get_pstate_type(power_state);
-
- assert(req_state != NULL);
-
- if (power_level > PLAT_MAX_PWR_LVL)
- return PSCI_E_INVALID_PARAMS;
-
- if (type == PSTATE_TYPE_STANDBY) {
- /* Only one retention power state is supported. */
- if (psci_get_pstate_id(power_state) > 0)
- return PSCI_E_INVALID_PARAMS;
- /* The SoC cannot be suspended without losing state */
- if (power_level == SYSTEM_PWR_LVL)
- return PSCI_E_INVALID_PARAMS;
- for (unsigned int i = 0; i <= power_level; ++i)
- req_state->pwr_domain_state[i] = PLAT_MAX_RET_STATE;
- } else {
- /* Only one off power state is supported. */
- if (psci_get_pstate_id(power_state) > 0)
- return PSCI_E_INVALID_PARAMS;
- for (unsigned int i = 0; i <= power_level; ++i)
- req_state->pwr_domain_state[i] = PLAT_MAX_OFF_STATE;
- }
- /* Higher power domain levels should all remain running */
- for (unsigned int i = power_level + 1; i <= PLAT_MAX_PWR_LVL; ++i)
- req_state->pwr_domain_state[i] = PSCI_LOCAL_STATE_RUN;
-
- return PSCI_E_SUCCESS;
-}
-
-static int sunxi_validate_ns_entrypoint(uintptr_t ns_entrypoint)
+int sunxi_validate_ns_entrypoint(uintptr_t ns_entrypoint)
{
/* The non-secure entry point must be in DRAM */
if (ns_entrypoint < SUNXI_DRAM_BASE) {
@@ -214,25 +25,6 @@ static int sunxi_validate_ns_entrypoint(uintptr_t ns_entrypoint)
return PSCI_E_SUCCESS;
}
-static void sunxi_get_sys_suspend_power_state(psci_power_state_t *req_state)
-{
- assert(req_state);
-
- for (unsigned int i = 0; i <= PLAT_MAX_PWR_LVL; ++i)
- req_state->pwr_domain_state[i] = PLAT_MAX_OFF_STATE;
-}
-
-static plat_psci_ops_t sunxi_psci_ops = {
- .cpu_standby = sunxi_cpu_standby,
- .pwr_domain_on = sunxi_pwr_domain_on,
- .pwr_domain_off = sunxi_pwr_domain_off,
- .pwr_domain_on_finish = sunxi_pwr_domain_on_finish,
- .system_off = sunxi_system_off,
- .system_reset = sunxi_system_reset,
- .validate_power_state = sunxi_validate_power_state,
- .validate_ns_entrypoint = sunxi_validate_ns_entrypoint,
-};
-
int plat_setup_psci_ops(uintptr_t sec_entrypoint,
const plat_psci_ops_t **psci_ops)
{
@@ -246,36 +38,12 @@ int plat_setup_psci_ops(uintptr_t sec_entrypoint,
sec_entrypoint >> 32);
}
- /* Check for a valid SCP firmware, and boot the SCP if found. */
- if (mmio_read_32(SUNXI_SCP_BASE) == SCP_FIRMWARE_MAGIC) {
- /* Program SCP exception vectors to the firmware entrypoint. */
- for (unsigned int i = OR1K_VEC_FIRST; i <= OR1K_VEC_LAST; ++i) {
- uint32_t vector = SUNXI_SRAM_A2_BASE + OR1K_VEC_ADDR(i);
- uint32_t offset = SUNXI_SCP_BASE - vector;
-
- mmio_write_32(vector, offset >> 2);
- clean_dcache_range(vector, sizeof(uint32_t));
- }
- /* Take the SCP out of reset. */
- mmio_setbits_32(SUNXI_R_CPUCFG_BASE, BIT(0));
- /* Wait for the SCP firmware to boot. */
- if (scpi_wait_ready() == 0)
- scpi_available = true;
- }
-
- NOTICE("PSCI: System suspend is %s\n",
- scpi_available ? "available via SCPI" : "unavailable");
- if (scpi_available) {
- /* Suspend is only available via SCPI. */
- sunxi_psci_ops.pwr_domain_suspend = sunxi_pwr_domain_off;
- sunxi_psci_ops.pwr_domain_suspend_finish = sunxi_pwr_domain_on_finish;
- sunxi_psci_ops.get_sys_suspend_power_state = sunxi_get_sys_suspend_power_state;
+ if (sunxi_set_scpi_psci_ops(psci_ops) == 0) {
+ INFO("PSCI: Suspend is available via SCPI\n");
} else {
- /* This is only needed when SCPI is unavailable. */
- sunxi_psci_ops.pwr_domain_pwr_down_wfi = sunxi_pwr_down_wfi;
+ INFO("PSCI: Suspend is unavailable\n");
+ sunxi_set_native_psci_ops(psci_ops);
}
- *psci_ops = &sunxi_psci_ops;
-
return 0;
}