mediatek: mt8183: add MTK SPM driver
Add MTK SPM driver for suspend/resume scenario.
Change-Id: I8207eea95914da9e63c62f3afc8329f3ccd9a22c
diff --git a/plat/mediatek/mt8183/drivers/spm/spm_suspend.c b/plat/mediatek/mt8183/drivers/spm/spm_suspend.c
new file mode 100644
index 0000000..b9ac19f
--- /dev/null
+++ b/plat/mediatek/mt8183/drivers/spm/spm_suspend.c
@@ -0,0 +1,255 @@
+/*
+ * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch_helpers.h>
+#include <common/debug.h>
+#include <drivers/delay_timer.h>
+#include <mt_gic_v3.h>
+#include <lib/mmio.h>
+#include <platform_def.h>
+#include <pmic.h>
+#include <spm.h>
+#include <uart.h>
+
+#define SPM_SYSCLK_SETTLE 99
+
+#define WAKE_SRC_FOR_SUSPEND \
+ (WAKE_SRC_R12_PCM_TIMER | \
+ WAKE_SRC_R12_SSPM_WDT_EVENT_B | \
+ WAKE_SRC_R12_KP_IRQ_B | \
+ WAKE_SRC_R12_CONN2AP_SPM_WAKEUP_B | \
+ WAKE_SRC_R12_EINT_EVENT_B | \
+ WAKE_SRC_R12_CONN_WDT_IRQ_B | \
+ WAKE_SRC_R12_CCIF0_EVENT_B | \
+ WAKE_SRC_R12_SSPM_SPM_IRQ_B | \
+ WAKE_SRC_R12_SCP_SPM_IRQ_B | \
+ WAKE_SRC_R12_SCP_WDT_EVENT_B | \
+ WAKE_SRC_R12_USB_CDSC_B | \
+ WAKE_SRC_R12_USB_POWERDWN_B | \
+ WAKE_SRC_R12_SYS_TIMER_EVENT_B | \
+ WAKE_SRC_R12_EINT_EVENT_SECURE_B | \
+ WAKE_SRC_R12_CCIF1_EVENT_B | \
+ WAKE_SRC_R12_MD2AP_PEER_EVENT_B | \
+ WAKE_SRC_R12_MD1_WDT_B | \
+ WAKE_SRC_R12_CLDMA_EVENT_B | \
+ WAKE_SRC_R12_SEJ_WDT_GPT_B)
+
+#define SLP_PCM_FLAGS \
+ (SPM_FLAG_DIS_VCORE_DVS | SPM_FLAG_DIS_VCORE_DFS | \
+ SPM_FLAG_DIS_ATF_ABORT | SPM_FLAG_DISABLE_MMSYS_DVFS | \
+ SPM_FLAG_DIS_INFRA_PDN | SPM_FLAG_SUSPEND_OPTION)
+
+#define SLP_PCM_FLAGS1 \
+ (SPM_FLAG1_DISABLE_MCDSR)
+
+static const struct pwr_ctrl suspend_ctrl = {
+ .wake_src = WAKE_SRC_FOR_SUSPEND,
+ .pcm_flags = SLP_PCM_FLAGS,
+ .pcm_flags1 = SLP_PCM_FLAGS1,
+
+ /* SPM_AP_STANDBY_CON */
+ .wfi_op = 0x1,
+ .mp0_cputop_idle_mask = 0,
+ .mp1_cputop_idle_mask = 0,
+ .mcusys_idle_mask = 0,
+ .mm_mask_b = 0,
+ .md_ddr_en_0_dbc_en = 0x1,
+ .md_ddr_en_1_dbc_en = 0,
+ .md_mask_b = 0x1,
+ .sspm_mask_b = 0x1,
+ .scp_mask_b = 0x1,
+ .srcclkeni_mask_b = 0x1,
+ .md_apsrc_1_sel = 0,
+ .md_apsrc_0_sel = 0,
+ .conn_ddr_en_dbc_en = 0x1,
+ .conn_mask_b = 0x1,
+ .conn_apsrc_sel = 0,
+
+ /* SPM_SRC_REQ */
+ .spm_apsrc_req = 0,
+ .spm_f26m_req = 0,
+ .spm_infra_req = 0,
+ .spm_vrf18_req = 0,
+ .spm_ddren_req = 0,
+ .spm_rsv_src_req = 0,
+ .spm_ddren_2_req = 0,
+ .cpu_md_dvfs_sop_force_on = 0,
+
+ /* SPM_SRC_MASK */
+ .csyspwreq_mask = 0x1,
+ .ccif0_md_event_mask_b = 0x1,
+ .ccif0_ap_event_mask_b = 0x1,
+ .ccif1_md_event_mask_b = 0x1,
+ .ccif1_ap_event_mask_b = 0x1,
+ .ccif2_md_event_mask_b = 0x1,
+ .ccif2_ap_event_mask_b = 0x1,
+ .ccif3_md_event_mask_b = 0x1,
+ .ccif3_ap_event_mask_b = 0x1,
+ .md_srcclkena_0_infra_mask_b = 0x1,
+ .md_srcclkena_1_infra_mask_b = 0,
+ .conn_srcclkena_infra_mask_b = 0,
+ .ufs_infra_req_mask_b = 0,
+ .srcclkeni_infra_mask_b = 0,
+ .md_apsrc_req_0_infra_mask_b = 0x1,
+ .md_apsrc_req_1_infra_mask_b = 0x1,
+ .conn_apsrcreq_infra_mask_b = 0x1,
+ .ufs_srcclkena_mask_b = 0,
+ .md_vrf18_req_0_mask_b = 0,
+ .md_vrf18_req_1_mask_b = 0,
+ .ufs_vrf18_req_mask_b = 0,
+ .gce_vrf18_req_mask_b = 0,
+ .conn_infra_req_mask_b = 0x1,
+ .gce_apsrc_req_mask_b = 0,
+ .disp0_apsrc_req_mask_b = 0,
+ .disp1_apsrc_req_mask_b = 0,
+ .mfg_req_mask_b = 0,
+ .vdec_req_mask_b = 0,
+
+ /* SPM_SRC2_MASK */
+ .md_ddr_en_0_mask_b = 0x1,
+ .md_ddr_en_1_mask_b = 0,
+ .conn_ddr_en_mask_b = 0x1,
+ .ddren_sspm_apsrc_req_mask_b = 0x1,
+ .ddren_scp_apsrc_req_mask_b = 0x1,
+ .disp0_ddren_mask_b = 0x1,
+ .disp1_ddren_mask_b = 0x1,
+ .gce_ddren_mask_b = 0x1,
+ .ddren_emi_self_refresh_ch0_mask_b = 0,
+ .ddren_emi_self_refresh_ch1_mask_b = 0,
+
+ /* SPM_WAKEUP_EVENT_MASK */
+ .spm_wakeup_event_mask = 0xF1782218,
+
+ /* SPM_WAKEUP_EVENT_EXT_MASK */
+ .spm_wakeup_event_ext_mask = 0xFFFFFFFF,
+
+ /* SPM_SRC3_MASK */
+ .md_ddr_en_2_0_mask_b = 0x1,
+ .md_ddr_en_2_1_mask_b = 0,
+ .conn_ddr_en_2_mask_b = 0x1,
+ .ddren2_sspm_apsrc_req_mask_b = 0x1,
+ .ddren2_scp_apsrc_req_mask_b = 0x1,
+ .disp0_ddren2_mask_b = 0,
+ .disp1_ddren2_mask_b = 0,
+ .gce_ddren2_mask_b = 0,
+ .ddren2_emi_self_refresh_ch0_mask_b = 0,
+ .ddren2_emi_self_refresh_ch1_mask_b = 0,
+
+ .mp0_cpu0_wfi_en = 0x1,
+ .mp0_cpu1_wfi_en = 0x1,
+ .mp0_cpu2_wfi_en = 0x1,
+ .mp0_cpu3_wfi_en = 0x1,
+
+ .mp1_cpu0_wfi_en = 0x1,
+ .mp1_cpu1_wfi_en = 0x1,
+ .mp1_cpu2_wfi_en = 0x1,
+ .mp1_cpu3_wfi_en = 0x1
+};
+
+static uint32_t spm_set_sysclk_settle(void)
+{
+ mmio_write_32(SPM_CLK_SETTLE, SPM_SYSCLK_SETTLE);
+ return mmio_read_32(SPM_CLK_SETTLE);
+}
+
+void go_to_sleep_before_wfi(void)
+{
+ int cpu = MPIDR_AFFLVL0_VAL(read_mpidr());
+ uint32_t settle;
+
+ settle = spm_set_sysclk_settle();
+ spm_set_cpu_status(cpu);
+ spm_set_power_control(&suspend_ctrl);
+ spm_set_wakeup_event(&suspend_ctrl);
+ spm_set_pcm_flags(&suspend_ctrl);
+ spm_send_cpu_wakeup_event();
+ spm_set_pcm_wdt(0);
+ spm_disable_pcm_timer();
+
+ if (is_infra_pdn(suspend_ctrl.pcm_flags))
+ mt_uart_save();
+
+ if (!mt_console_uart_cg_status())
+ console_switch_state(CONSOLE_FLAG_BOOT);
+
+ INFO("cpu%d: \"%s\", wakesrc = 0x%x, pcm_con1 = 0x%x\n",
+ cpu, spm_get_firmware_version(), suspend_ctrl.wake_src,
+ mmio_read_32(PCM_CON1));
+ INFO("settle = %u, sec = %u, sw_flag = 0x%x 0x%x, src_req = 0x%x\n",
+ settle, mmio_read_32(PCM_TIMER_VAL) / 32768,
+ suspend_ctrl.pcm_flags, suspend_ctrl.pcm_flags1,
+ mmio_read_32(SPM_SRC_REQ));
+
+ if (!mt_console_uart_cg_status())
+ console_switch_state(CONSOLE_FLAG_RUNTIME);
+}
+
+static void go_to_sleep_after_wfi(void)
+{
+ struct wake_status spm_wakesta;
+
+ if (is_infra_pdn(suspend_ctrl.pcm_flags))
+ mt_uart_restore();
+
+ spm_set_pcm_wdt(0);
+ spm_get_wakeup_status(&spm_wakesta);
+ spm_clean_after_wakeup();
+
+ if (!mt_console_uart_cg_status())
+ console_switch_state(CONSOLE_FLAG_BOOT);
+
+ spm_output_wake_reason(&spm_wakesta, "suspend");
+
+ if (!mt_console_uart_cg_status())
+ console_switch_state(CONSOLE_FLAG_RUNTIME);
+}
+
+static void spm_enable_armpll_l(void)
+{
+ /* power on */
+ mmio_setbits_32(ARMPLL_L_PWR_CON0, 0x1);
+
+ /* clear isolation */
+ mmio_clrbits_32(ARMPLL_L_PWR_CON0, 0x2);
+
+ /* enable pll */
+ mmio_setbits_32(ARMPLL_L_CON0, 0x1);
+
+ /* Add 20us delay for turning on PLL */
+ udelay(20);
+}
+
+static void spm_disable_armpll_l(void)
+{
+ /* disable pll */
+ mmio_clrbits_32(ARMPLL_L_CON0, 0x1);
+
+ /* isolation */
+ mmio_setbits_32(ARMPLL_L_PWR_CON0, 0x2);
+
+ /* power off */
+ mmio_clrbits_32(ARMPLL_L_PWR_CON0, 0x1);
+}
+
+void spm_system_suspend(void)
+{
+ spm_disable_armpll_l();
+ bcpu_enable(0);
+ bcpu_sram_enable(0);
+ spm_lock_get();
+ go_to_sleep_before_wfi();
+ spm_lock_release();
+}
+
+void spm_system_suspend_finish(void)
+{
+ spm_lock_get();
+ go_to_sleep_after_wfi();
+ spm_lock_release();
+ spm_enable_armpll_l();
+ bcpu_sram_enable(1);
+ bcpu_enable(1);
+}