mediatek: mt8192: Add SPM suspend driver
Supports dram/mainpll/26m off when system suspend
Change-Id: Id13a06d4132f00fb60066de75920ecac18306e32
diff --git a/plat/mediatek/mt8192/drivers/spm/constraints/mt_spm_rc_bus26m.c b/plat/mediatek/mt8192/drivers/spm/constraints/mt_spm_rc_bus26m.c
new file mode 100644
index 0000000..92fd25f
--- /dev/null
+++ b/plat/mediatek/mt8192/drivers/spm/constraints/mt_spm_rc_bus26m.c
@@ -0,0 +1,230 @@
+/*
+ * Copyright (c) 2020, MediaTek Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch_helpers.h>
+#include <common/debug.h>
+
+#include <mt_lp_rm.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>
+#include <plat_mtk_lpm.h>
+
+#ifndef ATF_PLAT_CIRQ_UNSUPPORT
+#include <mt_gic_v3.h>
+#include <plat_mt_cirq.h>
+#endif
+
+#define CONSTRAINT_BUS26M_ALLOW \
+ (MT_RM_CONSTRAINT_ALLOW_CPU_BUCK_OFF | \
+ MT_RM_CONSTRAINT_ALLOW_DRAM_S0 | \
+ MT_RM_CONSTRAINT_ALLOW_DRAM_S1 | \
+ MT_RM_CONSTRAINT_ALLOW_VCORE_LP | \
+ MT_RM_CONSTRAINT_ALLOW_LVTS_STATE | \
+ MT_RM_CONSTRAINT_ALLOW_BUS26M_OFF)
+
+#define CONSTRAINT_BUS26M_PCM_FLAG \
+ (SPM_FLAG_DISABLE_INFRA_PDN | \
+ SPM_FLAG_DISABLE_VCORE_DVS | \
+ SPM_FLAG_DISABLE_VCORE_DFS | \
+ SPM_FLAG_SRAM_SLEEP_CTRL | \
+ SPM_FLAG_ENABLE_TIA_WORKAROUND | \
+ SPM_FLAG_ENABLE_LVTS_WORKAROUND | \
+ SPM_FLAG_KEEP_CSYSPWRACK_HIGH)
+
+#define CONSTRAINT_BUS26M_PCM_FLAG1 \
+ (SPM_FLAG1_DISABLE_MD26M_CK_OFF)
+
+#define CONSTRAINT_BUS26M_RESOURCE_REQ 0U
+
+static unsigned int bus26m_ext_opand;
+static struct mt_irqremain *refer2remain_irq;
+static struct mt_spm_cond_tables cond_bus26m = {
+ .name = "bus26m",
+ .table_cg = {
+ 0x07CBF1FC, /* MTCMOS1 */
+ 0x0A0D8856, /* INFRA0 */
+ 0x03AF9A00, /* INFRA1 */
+ 0x86000650, /* INFRA2 */
+ 0xC800C000, /* INFRA3 */
+ 0x00000000, /* INFRA4 */
+ 0x4000007C, /* INFRA5 */
+ 0x280E0800, /* MMSYS0 */
+ 0x00000001, /* MMSYS1 */
+ 0x00000000, /* MMSYS2 */
+ },
+ .table_pll = (PLL_BIT_UNIVPLL | PLL_BIT_MFGPLL |
+ PLL_BIT_MSDCPLL | PLL_BIT_TVDPLL |
+ PLL_BIT_MMPLL),
+};
+
+static struct mt_spm_cond_tables cond_bus26m_res = {
+ .table_cg = { 0U },
+ .table_pll = 0U,
+};
+
+static struct constraint_status status = {
+ .id = MT_RM_CONSTRAINT_ID_BUS26M,
+ .valid = (MT_SPM_RC_VALID_SW |
+ MT_SPM_RC_VALID_COND_LATCH),
+ .cond_block = 0U,
+ .enter_cnt = 0U,
+ .cond_res = &cond_bus26m_res,
+};
+
+/*
+ * Cirq will take the place of gic when gic is off.
+ * However, cirq cannot work if 26m clk is turned off when system idle/suspend.
+ * Therefore, we need to set irq pending for specific wakeup source.
+ */
+#ifdef ATF_PLAT_CIRQ_UNSUPPORT
+#define do_irqs_delivery()
+#else
+static void mt_spm_irq_remain_dump(struct mt_irqremain *irqs,
+ unsigned int irq_index,
+ struct wake_status *wakeup)
+{
+ INFO("[SPM] r12 = 0x%08x(0x%08x), flag = 0x%08x 0x%08x 0x%08x\n",
+ wakeup->tr.comm.r12, wakeup->md32pcm_wakeup_sta,
+ wakeup->tr.comm.debug_flag, wakeup->tr.comm.b_sw_flag0,
+ wakeup->tr.comm.b_sw_flag1);
+
+ INFO("irq:%u(0x%08x) set pending\n",
+ irqs->wakeupsrc[irq_index], irqs->irqs[irq_index]);
+}
+
+static void do_irqs_delivery(void)
+{
+ unsigned int idx;
+ int res = 0;
+ struct wake_status *wakeup = NULL;
+ struct mt_irqremain *irqs = refer2remain_irq;
+
+ res = spm_conservation_get_result(&wakeup);
+
+ if ((res != 0) && (irqs == NULL)) {
+ return;
+ }
+
+ for (idx = 0U; idx < irqs->count; ++idx) {
+ if (((wakeup->tr.comm.r12 & irqs->wakeupsrc[idx]) != 0U) ||
+ ((wakeup->raw_sta & irqs->wakeupsrc[idx]) != 0U)) {
+ if ((irqs->wakeupsrc_cat[idx] &
+ MT_IRQ_REMAIN_CAT_LOG) != 0U) {
+ mt_spm_irq_remain_dump(irqs, idx, wakeup);
+ }
+
+ mt_irq_set_pending(irqs->irqs[idx]);
+ }
+ }
+}
+#endif
+
+static void spm_bus26m_conduct(struct spm_lp_scen *spm_lp,
+ unsigned int *resource_req)
+{
+ spm_lp->pwrctrl->pcm_flags = (uint32_t)CONSTRAINT_BUS26M_PCM_FLAG;
+ spm_lp->pwrctrl->pcm_flags1 = (uint32_t)CONSTRAINT_BUS26M_PCM_FLAG1;
+ *resource_req |= CONSTRAINT_BUS26M_RESOURCE_REQ;
+}
+
+bool spm_is_valid_rc_bus26m(unsigned int cpu, int state_id)
+{
+ (void)cpu;
+ (void)state_id;
+
+ return (status.cond_block == 0U) && IS_MT_RM_RC_READY(status.valid);
+}
+
+int spm_update_rc_bus26m(int state_id, int type, const void *val)
+{
+ const struct mt_spm_cond_tables *tlb;
+ const struct mt_spm_cond_tables *tlb_check;
+ int res = MT_RM_STATUS_OK;
+
+ if (val == NULL) {
+ return MT_RM_STATUS_BAD;
+ }
+
+ if (type == PLAT_RC_UPDATE_CONDITION) {
+ tlb = (const struct mt_spm_cond_tables *)val;
+ tlb_check = (const struct mt_spm_cond_tables *)&cond_bus26m;
+
+ status.cond_block =
+ mt_spm_cond_check(state_id, tlb, tlb_check,
+ ((status.valid &
+ MT_SPM_RC_VALID_COND_LATCH) != 0U) ?
+ &cond_bus26m_res : NULL);
+ } else if (type == PLAT_RC_UPDATE_REMAIN_IRQS) {
+ refer2remain_irq = (struct mt_irqremain *)val;
+ } else {
+ res = MT_RM_STATUS_BAD;
+ }
+
+ return res;
+}
+
+unsigned int spm_allow_rc_bus26m(int state_id)
+{
+ (void)state_id;
+
+ return CONSTRAINT_BUS26M_ALLOW;
+}
+
+int spm_run_rc_bus26m(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, CONSTRAINT_BUS26M_ALLOW |
+ (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_WDT |
+ MT_SPM_EX_OP_HW_S1_DETECT |
+ bus26m_ext_opand),
+ CONSTRAINT_BUS26M_RESOURCE_REQ);
+ } else {
+ mt_spm_idle_generic_enter(state_id, MT_SPM_EX_OP_HW_S1_DETECT,
+ spm_bus26m_conduct);
+ }
+
+ return 0;
+}
+
+int spm_reset_rc_bus26m(unsigned int cpu, int state_id)
+{
+ unsigned int ext_op = MT_SPM_EX_OP_HW_S1_DETECT;
+
+ (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)) {
+ ext_op |= (bus26m_ext_opand | MT_SPM_EX_OP_SET_WDT);
+ mt_spm_suspend_resume(state_id, ext_op, NULL);
+ bus26m_ext_opand = 0U;
+ } else {
+ mt_spm_idle_generic_resume(state_id, ext_op, NULL);
+ status.enter_cnt++;
+ }
+
+ do_irqs_delivery();
+
+ return 0;
+}