feat(plat/mediatek/mt8195): add SPM suspend driver
Support DRAM/MAINPLL/26M off when system suspend.
Signed-off-by: Edward-JW Yang <edward-jw.yang@mediatek.corp-partner.google.com>
Change-Id: Ib8502f9b0b4e47aa405e5449f0b6d483bd3f5d77
diff --git a/plat/mediatek/mt8195/drivers/spm/constraints/mt_spm_rc_cpu_buck_ldo.c b/plat/mediatek/mt8195/drivers/spm/constraints/mt_spm_rc_cpu_buck_ldo.c
new file mode 100644
index 0000000..cf71350
--- /dev/null
+++ b/plat/mediatek/mt8195/drivers/spm/constraints/mt_spm_rc_cpu_buck_ldo.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2021, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch_helpers.h>
+#include <common/debug.h>
+
+#include <mt_spm.h>
+#include <mt_spm_cond.h>
+#include <mt_spm_constraint.h>
+#include <mt_spm_conservation.h>
+#include <mt_spm_idle.h>
+#include <mt_spm_internal.h>
+#include <mt_spm_notifier.h>
+#include <mt_spm_rc_internal.h>
+#include <mt_spm_resource_req.h>
+#include <mt_spm_reg.h>
+#include <mt_spm_suspend.h>
+#include <plat_pm.h>
+
+#define CONSTRAINT_CPU_BUCK_PCM_FLAG \
+ (SPM_FLAG_DISABLE_INFRA_PDN | \
+ SPM_FLAG_DISABLE_VCORE_DVS | \
+ SPM_FLAG_DISABLE_VCORE_DFS | \
+ SPM_FLAG_SRAM_SLEEP_CTRL | \
+ SPM_FLAG_DISABLE_DRAMC_MCU_SRAM_SLEEP |\
+ SPM_FLAG_KEEP_CSYSPWRACK_HIGH)
+
+#define CONSTRAINT_CPU_BUCK_PCM_FLAG1 0U
+
+#define CONSTRAINT_CPU_BUCK_RESOURCE_REQ \
+ (MT_SPM_DRAM_S1 | \
+ MT_SPM_DRAM_S0 | \
+ MT_SPM_SYSPLL | \
+ MT_SPM_INFRA | \
+ MT_SPM_26M | \
+ MT_SPM_XO_FPM)
+
+
+static unsigned int cpubuckldo_status = MT_SPM_RC_VALID_SW;
+static unsigned int cpubuckldo_enter_cnt;
+
+static void spm_cpu_bcuk_ldo_conduct(struct spm_lp_scen *spm_lp,
+ unsigned int *resource_req)
+{
+ spm_lp->pwrctrl->pcm_flags = (uint32_t)CONSTRAINT_CPU_BUCK_PCM_FLAG;
+ spm_lp->pwrctrl->pcm_flags1 = (uint32_t)CONSTRAINT_CPU_BUCK_PCM_FLAG1;
+ *resource_req |= CONSTRAINT_CPU_BUCK_RESOURCE_REQ;
+}
+
+bool spm_is_valid_rc_cpu_buck_ldo(unsigned int cpu, int state_id)
+{
+ (void)cpu;
+ (void)state_id;
+
+ return IS_MT_RM_RC_READY(cpubuckldo_status);
+}
+
+unsigned int spm_allow_rc_cpu_buck_ldo(int state_id)
+{
+ (void)state_id;
+
+ return MT_RM_CONSTRAINT_ALLOW_CPU_BUCK_OFF;
+}
+
+int spm_run_rc_cpu_buck_ldo(unsigned int cpu, int state_id)
+{
+ (void)cpu;
+
+#ifndef ATF_PLAT_SPM_SSPM_NOTIFIER_UNSUPPORT
+ mt_spm_sspm_notify_u32(MT_SPM_NOTIFY_LP_ENTER,
+ (IS_PLAT_SUSPEND_ID(state_id) ?
+ MT_RM_CONSTRAINT_ALLOW_AP_SUSPEND : 0U));
+#endif
+ if (IS_PLAT_SUSPEND_ID(state_id)) {
+ mt_spm_suspend_enter(state_id,
+ MT_SPM_EX_OP_SET_SUSPEND_MODE |
+ MT_SPM_EX_OP_SET_WDT,
+ CONSTRAINT_CPU_BUCK_RESOURCE_REQ);
+ } else {
+ mt_spm_idle_generic_enter(state_id, 0U,
+ spm_cpu_bcuk_ldo_conduct);
+ }
+
+ cpubuckldo_enter_cnt++;
+
+ return 0;
+}
+
+int spm_reset_rc_cpu_buck_ldo(unsigned int cpu, int state_id)
+{
+ (void)cpu;
+
+#ifndef ATF_PLAT_SPM_SSPM_NOTIFIER_UNSUPPORT
+ mt_spm_sspm_notify_u32(MT_SPM_NOTIFY_LP_LEAVE, 0U);
+#endif
+ if (IS_PLAT_SUSPEND_ID(state_id)) {
+ mt_spm_suspend_resume(state_id, MT_SPM_EX_OP_SET_WDT, NULL);
+ } else {
+ mt_spm_idle_generic_resume(state_id, 0U, NULL);
+ }
+
+ return 0;
+}