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path: root/plat/mediatek/mt8192/drivers/mcdi/mt_cpu_pm.c
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Diffstat (limited to 'plat/mediatek/mt8192/drivers/mcdi/mt_cpu_pm.c')
-rw-r--r--plat/mediatek/mt8192/drivers/mcdi/mt_cpu_pm.c149
1 files changed, 149 insertions, 0 deletions
diff --git a/plat/mediatek/mt8192/drivers/mcdi/mt_cpu_pm.c b/plat/mediatek/mt8192/drivers/mcdi/mt_cpu_pm.c
new file mode 100644
index 0000000000..b483c367df
--- /dev/null
+++ b/plat/mediatek/mt8192/drivers/mcdi/mt_cpu_pm.c
@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2020, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <stdint.h>
+
+#include <arch_helpers.h>
+#include <lib/psci/psci.h>
+#include <lib/spinlock.h>
+
+#include <mt_cpu_pm_cpc.h>
+#include <mt_lp_irqremain.h>
+#include <mt_lp_rm.h>
+#include <mt_mcdi.h>
+#include <plat_mtk_lpm.h>
+#include <plat_pm.h>
+
+DEFINE_SYSREG_RW_FUNCS(dbgprcr_el1);
+
+static int plat_mt_lp_cpu_rc;
+
+static int pwr_state_prompt(unsigned int cpu, const psci_power_state_t *state)
+{
+ return 0;
+}
+
+static int pwr_state_reflect(unsigned int cpu, const psci_power_state_t *state)
+{
+ mtk_cpc_core_on_hint_clr(cpu);
+
+ if (IS_SYSTEM_SUSPEND_STATE(state)) {
+ mtk_cpc_time_sync();
+ }
+
+ return 0;
+}
+
+static int pwr_cpu_pwron(unsigned int cpu, const psci_power_state_t *state)
+{
+ return 0;
+}
+
+static int pwr_cpu_pwrdwn(unsigned int cpu, const psci_power_state_t *state)
+{
+ /* clear DBGPRCR.CORENPDRQ to allow CPU power down */
+ write_dbgprcr_el1(0ULL);
+
+ return 0;
+}
+
+static int pwr_cluster_pwron(unsigned int cpu, const psci_power_state_t *state)
+{
+ return 0;
+}
+
+static int pwr_cluster_pwrdwn(unsigned int cpu, const psci_power_state_t *state)
+{
+ return 0;
+}
+
+static int pwr_mcusys_pwron(unsigned int cpu, const psci_power_state_t *state)
+{
+ if (!IS_MCUSYS_OFF_STATE(state) || (plat_mt_lp_cpu_rc < 0)) {
+ return -1;
+ }
+
+ mtk_cpc_mcusys_off_reflect();
+
+ return 0;
+}
+
+static int pwr_mcusys_pwron_finished(unsigned int cpu,
+ const psci_power_state_t *state)
+{
+ int state_id = state->pwr_domain_state[MTK_AFFLVL_MCUSYS];
+
+ if (!IS_MCUSYS_OFF_STATE(state) || (plat_mt_lp_cpu_rc < 0)) {
+ return -1;
+ }
+
+ mt_lp_rm_reset_constraint(plat_mt_lp_cpu_rc, cpu, state_id);
+ mt_lp_irqremain_release();
+
+ return 0;
+}
+
+static int pwr_mcusys_pwrdwn(unsigned int cpu, const psci_power_state_t *state)
+{
+ int state_id = state->pwr_domain_state[MTK_AFFLVL_MCUSYS];
+
+ if (!IS_MCUSYS_OFF_STATE(state)) {
+ goto mt_pwr_mcusysoff_break;
+ }
+
+ if (mcdi_try_init() != 0) {
+ goto mt_pwr_mcusysoff_break;
+ }
+
+ if (mtk_cpc_mcusys_off_prepare() != CPC_SUCCESS) {
+ goto mt_pwr_mcusysoff_break;
+ }
+
+ plat_mt_lp_cpu_rc =
+ mt_lp_rm_find_and_run_constraint(0, cpu, state_id, NULL);
+
+ if (plat_mt_lp_cpu_rc < 0) {
+ goto mt_pwr_mcusysoff_reflect;
+ }
+
+ mt_lp_irqremain_aquire();
+
+ return 0;
+
+mt_pwr_mcusysoff_reflect:
+ mtk_cpc_mcusys_off_reflect();
+
+mt_pwr_mcusysoff_break:
+ plat_mt_lp_cpu_rc = -1;
+
+ return -1;
+}
+
+static const struct mt_lpm_tz plat_pm = {
+ .pwr_prompt = pwr_state_prompt,
+ .pwr_reflect = pwr_state_reflect,
+ .pwr_cpu_on = pwr_cpu_pwron,
+ .pwr_cpu_dwn = pwr_cpu_pwrdwn,
+ .pwr_cluster_on = pwr_cluster_pwron,
+ .pwr_cluster_dwn = pwr_cluster_pwrdwn,
+ .pwr_mcusys_dwn = pwr_mcusys_pwrdwn,
+ .pwr_mcusys_on = pwr_mcusys_pwron,
+ .pwr_mcusys_on_finished = pwr_mcusys_pwron_finished
+};
+
+const struct mt_lpm_tz *mt_plat_cpu_pm_init(void)
+{
+ mtk_cpc_init();
+
+ if (mcdi_try_init() == 0) {
+ INFO("MCDI init done.\n");
+ }
+
+ mt_lp_irqremain_init();
+
+ return &plat_pm;
+}