soc/mediatek/mt8195: add SPM loader

This patch adds support for loading SPM firmware from CBFS to SPM SRAM.
SPM needs its own firmware to enable SPM suspend/resume function which
turns off several resources such as DRAM/mainpll/26M clk when linux
system suspend.

TEST=program counter of SPM is correct value after booting up.

Change-Id: Ia0f9b9f86e44b293c1cc47213946304c64aea75e
Signed-off-by: Dawei Chien <dawei.chien@mediatek.com>
Signed-off-by: Edward-JW Yang <edward-jw.yang@mediatek.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55140
Reviewed-by: Rex-BC Chen <rex-bc.chen@mediatek.corp-partner.google.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 714 insertions, 0 deletions

diff --git a/src/soc/mediatek/mt8195/spm.c b/src/soc/mediatek/mt8195/spm.c
new file mode 100644
index 0000000000..018063ce73
--- /dev/null
+++ b/src/soc/mediatek/mt8195/spm.c
@@ -0,0 +1,714 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <assert.h>
+#include <console/console.h>
+#include <delay.h>
+#include <device/mmio.h>
+#include <soc/mcu_common.h>
+#include <soc/spm.h>
+#include <soc/spm_common.h>
+#include <soc/symbols.h>
+#include <string.h>
+#include <timer.h>
+
+#define SPM_SYSTEM_BASE_OFFSET	0x40000000
+
+static const struct pwr_ctrl spm_init_ctrl = {
+	.pcm_flags = SPM_FLAG_DISABLE_VCORE_DVS | SPM_FLAG_DISABLE_VCORE_DFS |
+		     SPM_FLAG_RUN_COMMON_SCENARIO,
+
+	/* SPM_AP_STANDBY_CON */
+	/* [0] */
+	.reg_wfi_op = 0,
+	/* [1] */
+	.reg_wfi_type = 0,
+	/* [2] */
+	.reg_mp0_cputop_idle_mask = 0,
+	/* [3] */
+	.reg_mp1_cputop_idle_mask = 0,
+	/* [4] */
+	.reg_mcusys_idle_mask = 0,
+	/* [25] */
+	.reg_md_apsrc_1_sel = 0,
+	/* [26] */
+	.reg_md_apsrc_0_sel = 0,
+	/* [29] */
+	.reg_conn_apsrc_sel = 0,
+
+	/* SPM_SRC_REQ */
+	/* [0] */
+	.reg_spm_apsrc_req = 0,
+	/* [1] */
+	.reg_spm_f26m_req = 0,
+	/* [3] */
+	.reg_spm_infra_req = 0,
+	/* [4] */
+	.reg_spm_vrf18_req = 0,
+	/* [7] FIXME: default disable HW Auto S1*/
+	.reg_spm_ddr_en_req = 1,
+	/* [8] */
+	.reg_spm_dvfs_req = 0,
+	/* [9] */
+	.reg_spm_sw_mailbox_req = 0,
+	/* [10] */
+	.reg_spm_sspm_mailbox_req = 0,
+	/* [11] */
+	.reg_spm_adsp_mailbox_req = 0,
+	/* [12] */
+	.reg_spm_scp_mailbox_req = 0,
+
+	/* SPM_SRC_MASK */
+	/* [0] */
+	.reg_sspm_srcclkena_0_mask_b = 1,
+	/* [1] */
+	.reg_sspm_infra_req_0_mask_b = 1,
+	/* [2] */
+	.reg_sspm_apsrc_req_0_mask_b = 1,
+	/* [3] */
+	.reg_sspm_vrf18_req_0_mask_b = 1,
+	/* [4] */
+	.reg_sspm_ddr_en_0_mask_b = 1,
+	/* [5] */
+	.reg_scp_srcclkena_mask_b = 1,
+	/* [6] */
+	.reg_scp_infra_req_mask_b = 1,
+	/* [7] */
+	.reg_scp_apsrc_req_mask_b = 1,
+	/* [8] */
+	.reg_scp_vrf18_req_mask_b = 1,
+	/* [9] */
+	.reg_scp_ddr_en_mask_b = 1,
+	/* [10] */
+	.reg_audio_dsp_srcclkena_mask_b = 1,
+	/* [11] */
+	.reg_audio_dsp_infra_req_mask_b = 1,
+	/* [12] */
+	.reg_audio_dsp_apsrc_req_mask_b = 1,
+	/* [13] */
+	.reg_audio_dsp_vrf18_req_mask_b = 1,
+	/* [14] */
+	.reg_audio_dsp_ddr_en_mask_b = 1,
+	/* [15] */
+	.reg_apu_srcclkena_mask_b = 1,
+	/* [16] */
+	.reg_apu_infra_req_mask_b = 1,
+	/* [17] */
+	.reg_apu_apsrc_req_mask_b = 1,
+	/* [18] */
+	.reg_apu_vrf18_req_mask_b = 1,
+	/* [19] */
+	.reg_apu_ddr_en_mask_b = 1,
+	/* [20] */
+	.reg_cpueb_srcclkena_mask_b = 1,
+	/* [21] */
+	.reg_cpueb_infra_req_mask_b = 1,
+	/* [22] */
+	.reg_cpueb_apsrc_req_mask_b = 1,
+	/* [23] */
+	.reg_cpueb_vrf18_req_mask_b = 1,
+	/* [24] */
+	.reg_cpueb_ddr_en_mask_b = 1,
+	/* [25] */
+	.reg_bak_psri_srcclkena_mask_b = 0,
+	/* [26] */
+	.reg_bak_psri_infra_req_mask_b = 0,
+	/* [27] */
+	.reg_bak_psri_apsrc_req_mask_b = 0,
+	/* [28] */
+	.reg_bak_psri_vrf18_req_mask_b = 0,
+	/* [29] */
+	.reg_bak_psri_ddr_en_mask_b = 0,
+
+	/* SPM_SRC2_MASK */
+	/* [0] */
+	.reg_msdc0_srcclkena_mask_b = 1,
+	/* [1] */
+	.reg_msdc0_infra_req_mask_b = 1,
+	/* [2] */
+	.reg_msdc0_apsrc_req_mask_b = 1,
+	/* [3] */
+	.reg_msdc0_vrf18_req_mask_b = 1,
+	/* [4] */
+	.reg_msdc0_ddr_en_mask_b = 1,
+	/* [5] */
+	.reg_msdc1_srcclkena_mask_b = 1,
+	/* [6] */
+	.reg_msdc1_infra_req_mask_b = 1,
+	/* [7] */
+	.reg_msdc1_apsrc_req_mask_b = 1,
+	/* [8] */
+	.reg_msdc1_vrf18_req_mask_b = 1,
+	/* [9] */
+	.reg_msdc1_ddr_en_mask_b = 1,
+	/* [10] */
+	.reg_msdc2_srcclkena_mask_b = 1,
+	/* [11] */
+	.reg_msdc2_infra_req_mask_b = 1,
+	/* [12] */
+	.reg_msdc2_apsrc_req_mask_b = 1,
+	/* [13] */
+	.reg_msdc2_vrf18_req_mask_b = 1,
+	/* [14] */
+	.reg_msdc2_ddr_en_mask_b = 1,
+	/* [15] */
+	.reg_ufs_srcclkena_mask_b = 1,
+	/* [16] */
+	.reg_ufs_infra_req_mask_b = 1,
+	/* [17] */
+	.reg_ufs_apsrc_req_mask_b = 1,
+	/* [18] */
+	.reg_ufs_vrf18_req_mask_b = 1,
+	/* [19] */
+	.reg_ufs_ddr_en_mask_b = 1,
+	/* [20] */
+	.reg_usb_srcclkena_mask_b = 1,
+	/* [21] */
+	.reg_usb_infra_req_mask_b = 1,
+	/* [22] */
+	.reg_usb_apsrc_req_mask_b = 1,
+	/* [23] */
+	.reg_usb_vrf18_req_mask_b = 1,
+	/* [24] */
+	.reg_usb_ddr_en_mask_b = 1,
+	/* [25] */
+	.reg_pextp_p0_srcclkena_mask_b = 1,
+	/* [26] */
+	.reg_pextp_p0_infra_req_mask_b = 1,
+	/* [27] */
+	.reg_pextp_p0_apsrc_req_mask_b = 1,
+	/* [28] */
+	.reg_pextp_p0_vrf18_req_mask_b = 1,
+	/* [29] */
+	.reg_pextp_p0_ddr_en_mask_b = 1,
+
+	/* SPM_SRC3_MASK */
+	/* [0] */
+	.reg_pextp_p1_srcclkena_mask_b = 1,
+	/* [1] */
+	.reg_pextp_p1_infra_req_mask_b = 1,
+	/* [2] */
+	.reg_pextp_p1_apsrc_req_mask_b = 1,
+	/* [3] */
+	.reg_pextp_p1_vrf18_req_mask_b = 1,
+	/* [4] */
+	.reg_pextp_p1_ddr_en_mask_b = 1,
+	/* [5] */
+	.reg_gce0_infra_req_mask_b = 1,
+	/* [6] */
+	.reg_gce0_apsrc_req_mask_b = 1,
+	/* [7] */
+	.reg_gce0_vrf18_req_mask_b = 1,
+	/* [8] */
+	.reg_gce0_ddr_en_mask_b = 1,
+	/* [9] */
+	.reg_gce1_infra_req_mask_b = 1,
+	/* [10] */
+	.reg_gce1_apsrc_req_mask_b = 1,
+	/* [11] */
+	.reg_gce1_vrf18_req_mask_b = 1,
+	/* [12] */
+	.reg_gce1_ddr_en_mask_b = 1,
+	/* [13] */
+	.reg_spm_srcclkena_reserved_mask_b = 1,
+	/* [14] */
+	.reg_spm_infra_req_reserved_mask_b = 1,
+	/* [15] */
+	.reg_spm_apsrc_req_reserved_mask_b = 1,
+	/* [16] */
+	.reg_spm_vrf18_req_reserved_mask_b = 1,
+	/* [17] */
+	.reg_spm_ddr_en_reserved_mask_b = 1,
+	/* [18] */
+	.reg_disp0_apsrc_req_mask_b = 1,
+	/* [19] */
+	.reg_disp0_ddr_en_mask_b = 1,
+	/* [20] */
+	.reg_disp1_apsrc_req_mask_b = 1,
+	/* [21] */
+	.reg_disp1_ddr_en_mask_b = 1,
+	/* [22] */
+	.reg_disp2_apsrc_req_mask_b = 1,
+	/* [23] */
+	.reg_disp2_ddr_en_mask_b = 1,
+	/* [24] */
+	.reg_disp3_apsrc_req_mask_b = 1,
+	/* [25] */
+	.reg_disp3_ddr_en_mask_b = 1,
+	/* [26] */
+	.reg_infrasys_apsrc_req_mask_b = 0,
+	/* [27] */
+	.reg_infrasys_ddr_en_mask_b = 1,
+
+	/* [28] */
+	.reg_cg_check_srcclkena_mask_b = 1,
+	/* [29] */
+	.reg_cg_check_apsrc_req_mask_b = 1,
+	/* [30] */
+	.reg_cg_check_vrf18_req_mask_b = 1,
+	/* [31] */
+	.reg_cg_check_ddr_en_mask_b = 1,
+
+	/* SPM_SRC4_MASK */
+	/* [8:0] */
+	.reg_mcusys_merge_apsrc_req_mask_b = 0x17,
+	/* [17:9] */
+	.reg_mcusys_merge_ddr_en_mask_b = 0x17,
+	/* [19:18] */
+	.reg_dramc_md32_infra_req_mask_b = 0,
+	/* [21:20] */
+	.reg_dramc_md32_vrf18_req_mask_b = 0,
+	/* [23:22] */
+	.reg_dramc_md32_ddr_en_mask_b = 0,
+	/* [24] */
+	.reg_dvfsrc_event_trigger_mask_b = 1,
+
+	/* SPM_WAKEUP_EVENT_MASK2 */
+	/* [3:0] */
+	.reg_sc_sw2spm_wakeup_mask_b = 0,
+	/* [4] */
+	.reg_sc_adsp2spm_wakeup_mask_b = 0,
+	/* [8:5] */
+	.reg_sc_sspm2spm_wakeup_mask_b = 0,
+	/* [9] */
+	.reg_sc_scp2spm_wakeup_mask_b = 0,
+	/* [10] */
+	.reg_csyspwrup_ack_mask = 0,
+	/* [11] */
+	.reg_csyspwrup_req_mask = 1,
+
+	/* SPM_WAKEUP_EVENT_MASK */
+	/* [31:0] */
+	.reg_wakeup_event_mask = 0xC1382213,
+
+	/* SPM_WAKEUP_EVENT_EXT_MASK */
+	/* [31:0] */
+	.reg_ext_wakeup_event_mask = 0xFFFFFFFF,
+};
+
+static void spm_set_power_control(const struct pwr_ctrl *pwrctrl)
+{
+	/* Auto-gen Start */
+
+	/* SPM_AP_STANDBY_CON */
+	write32(&mtk_spm->spm_ap_standby_con,
+		((pwrctrl->reg_wfi_op & 0x1) << 0) |
+		((pwrctrl->reg_wfi_type & 0x1) << 1) |
+		((pwrctrl->reg_mp0_cputop_idle_mask & 0x1) << 2) |
+		((pwrctrl->reg_mp1_cputop_idle_mask & 0x1) << 3) |
+		((pwrctrl->reg_mcusys_idle_mask & 0x1) << 4) |
+		((pwrctrl->reg_md_apsrc_1_sel & 0x1) << 25) |
+		((pwrctrl->reg_md_apsrc_0_sel & 0x1) << 26) |
+		((pwrctrl->reg_conn_apsrc_sel & 0x1) << 29));
+
+	/* SPM_SRC_REQ */
+	write32(&mtk_spm->spm_src_req,
+		((pwrctrl->reg_spm_apsrc_req & 0x1) << 0) |
+		((pwrctrl->reg_spm_f26m_req & 0x1) << 1) |
+		((pwrctrl->reg_spm_infra_req & 0x1) << 3) |
+		((pwrctrl->reg_spm_vrf18_req & 0x1) << 4) |
+		((pwrctrl->reg_spm_ddr_en_req & 0x1) << 7) |
+		((pwrctrl->reg_spm_dvfs_req & 0x1) << 8) |
+		((pwrctrl->reg_spm_sw_mailbox_req & 0x1) << 9) |
+		((pwrctrl->reg_spm_sspm_mailbox_req & 0x1) << 10) |
+		((pwrctrl->reg_spm_adsp_mailbox_req & 0x1) << 11) |
+		((pwrctrl->reg_spm_scp_mailbox_req & 0x1) << 12));
+
+	/* SPM_SRC_MASK */
+	write32(&mtk_spm->spm_src_mask,
+		((pwrctrl->reg_sspm_srcclkena_0_mask_b & 0x1) << 0) |
+		((pwrctrl->reg_sspm_infra_req_0_mask_b & 0x1) << 1) |
+		((pwrctrl->reg_sspm_apsrc_req_0_mask_b & 0x1) << 2) |
+		((pwrctrl->reg_sspm_vrf18_req_0_mask_b & 0x1) << 3) |
+		((pwrctrl->reg_sspm_ddr_en_0_mask_b & 0x1) << 4) |
+		((pwrctrl->reg_scp_srcclkena_mask_b & 0x1) << 5) |
+		((pwrctrl->reg_scp_infra_req_mask_b & 0x1) << 6) |
+		((pwrctrl->reg_scp_apsrc_req_mask_b & 0x1) << 7) |
+		((pwrctrl->reg_scp_vrf18_req_mask_b & 0x1) << 8) |
+		((pwrctrl->reg_scp_ddr_en_mask_b & 0x1) << 9) |
+		((pwrctrl->reg_audio_dsp_srcclkena_mask_b & 0x1) << 10) |
+		((pwrctrl->reg_audio_dsp_infra_req_mask_b & 0x1) << 11) |
+		((pwrctrl->reg_audio_dsp_apsrc_req_mask_b & 0x1) << 12) |
+		((pwrctrl->reg_audio_dsp_vrf18_req_mask_b & 0x1) << 13) |
+		((pwrctrl->reg_audio_dsp_ddr_en_mask_b & 0x1) << 14) |
+		((pwrctrl->reg_apu_srcclkena_mask_b & 0x1) << 15) |
+		((pwrctrl->reg_apu_infra_req_mask_b & 0x1) << 16) |
+		((pwrctrl->reg_apu_apsrc_req_mask_b & 0x1) << 17) |
+		((pwrctrl->reg_apu_vrf18_req_mask_b & 0x1) << 18) |
+		((pwrctrl->reg_apu_ddr_en_mask_b & 0x1) << 19) |
+		((pwrctrl->reg_cpueb_srcclkena_mask_b & 0x1) << 20) |
+		((pwrctrl->reg_cpueb_infra_req_mask_b & 0x1) << 21) |
+		((pwrctrl->reg_cpueb_apsrc_req_mask_b & 0x1) << 22) |
+		((pwrctrl->reg_cpueb_vrf18_req_mask_b & 0x1) << 23) |
+		((pwrctrl->reg_cpueb_ddr_en_mask_b & 0x1) << 24) |
+		((pwrctrl->reg_bak_psri_srcclkena_mask_b & 0x1) << 25) |
+		((pwrctrl->reg_bak_psri_infra_req_mask_b & 0x1) << 26) |
+		((pwrctrl->reg_bak_psri_apsrc_req_mask_b & 0x1) << 27) |
+		((pwrctrl->reg_bak_psri_vrf18_req_mask_b & 0x1) << 28) |
+		((pwrctrl->reg_bak_psri_ddr_en_mask_b & 0x1) << 29));
+
+	/* SPM_SRC2_MASK */
+	write32(&mtk_spm->spm_src2_mask,
+		((pwrctrl->reg_msdc0_srcclkena_mask_b & 0x1) << 0) |
+		((pwrctrl->reg_msdc0_infra_req_mask_b & 0x1) << 1) |
+		((pwrctrl->reg_msdc0_apsrc_req_mask_b & 0x1) << 2) |
+		((pwrctrl->reg_msdc0_vrf18_req_mask_b & 0x1) << 3) |
+		((pwrctrl->reg_msdc0_ddr_en_mask_b & 0x1) << 4) |
+		((pwrctrl->reg_msdc1_srcclkena_mask_b & 0x1) << 5) |
+		((pwrctrl->reg_msdc1_infra_req_mask_b & 0x1) << 6) |
+		((pwrctrl->reg_msdc1_apsrc_req_mask_b & 0x1) << 7) |
+		((pwrctrl->reg_msdc1_vrf18_req_mask_b & 0x1) << 8) |
+		((pwrctrl->reg_msdc1_ddr_en_mask_b & 0x1) << 9) |
+		((pwrctrl->reg_msdc2_srcclkena_mask_b & 0x1) << 10) |
+		((pwrctrl->reg_msdc2_infra_req_mask_b & 0x1) << 11) |
+		((pwrctrl->reg_msdc2_apsrc_req_mask_b & 0x1) << 12) |
+		((pwrctrl->reg_msdc2_vrf18_req_mask_b & 0x1) << 13) |
+		((pwrctrl->reg_msdc2_ddr_en_mask_b & 0x1) << 14) |
+		((pwrctrl->reg_ufs_srcclkena_mask_b & 0x1) << 15) |
+		((pwrctrl->reg_ufs_infra_req_mask_b & 0x1) << 16) |
+		((pwrctrl->reg_ufs_apsrc_req_mask_b & 0x1) << 17) |
+		((pwrctrl->reg_ufs_vrf18_req_mask_b & 0x1) << 18) |
+		((pwrctrl->reg_ufs_ddr_en_mask_b & 0x1) << 19) |
+		((pwrctrl->reg_usb_srcclkena_mask_b & 0x1) << 20) |
+		((pwrctrl->reg_usb_infra_req_mask_b & 0x1) << 21) |
+		((pwrctrl->reg_usb_apsrc_req_mask_b & 0x1) << 22) |
+		((pwrctrl->reg_usb_vrf18_req_mask_b & 0x1) << 23) |
+		((pwrctrl->reg_usb_ddr_en_mask_b & 0x1) << 24) |
+		((pwrctrl->reg_pextp_p0_srcclkena_mask_b & 0x1) << 25) |
+		((pwrctrl->reg_pextp_p0_infra_req_mask_b & 0x1) << 26) |
+		((pwrctrl->reg_pextp_p0_apsrc_req_mask_b & 0x1) << 27) |
+		((pwrctrl->reg_pextp_p0_vrf18_req_mask_b & 0x1) << 28) |
+		((pwrctrl->reg_pextp_p0_ddr_en_mask_b & 0x1) << 29));
+
+	/* SPM_SRC3_MASK */
+	write32(&mtk_spm->spm_src3_mask,
+		((pwrctrl->reg_pextp_p1_srcclkena_mask_b & 0x1) << 0) |
+		((pwrctrl->reg_pextp_p1_infra_req_mask_b & 0x1) << 1) |
+		((pwrctrl->reg_pextp_p1_apsrc_req_mask_b & 0x1) << 2) |
+		((pwrctrl->reg_pextp_p1_vrf18_req_mask_b & 0x1) << 3) |
+		((pwrctrl->reg_pextp_p1_ddr_en_mask_b & 0x1) << 4) |
+		((pwrctrl->reg_gce0_infra_req_mask_b & 0x1) << 5) |
+		((pwrctrl->reg_gce0_apsrc_req_mask_b & 0x1) << 6) |
+		((pwrctrl->reg_gce0_vrf18_req_mask_b & 0x1) << 7) |
+		((pwrctrl->reg_gce0_ddr_en_mask_b & 0x1) << 8) |
+		((pwrctrl->reg_gce1_infra_req_mask_b & 0x1) << 9) |
+		((pwrctrl->reg_gce1_apsrc_req_mask_b & 0x1) << 10) |
+		((pwrctrl->reg_gce1_vrf18_req_mask_b & 0x1) << 11) |
+		((pwrctrl->reg_gce1_ddr_en_mask_b & 0x1) << 12) |
+		((pwrctrl->reg_spm_srcclkena_reserved_mask_b & 0x1) << 13) |
+		((pwrctrl->reg_spm_infra_req_reserved_mask_b & 0x1) << 14) |
+		((pwrctrl->reg_spm_apsrc_req_reserved_mask_b & 0x1) << 15) |
+		((pwrctrl->reg_spm_vrf18_req_reserved_mask_b & 0x1) << 16) |
+		((pwrctrl->reg_spm_ddr_en_reserved_mask_b & 0x1) << 17) |
+		((pwrctrl->reg_disp0_ddr_en_mask_b & 0x1) << 18) |
+		((pwrctrl->reg_disp0_ddr_en_mask_b & 0x1) << 19) |
+		((pwrctrl->reg_disp1_apsrc_req_mask_b & 0x1) << 20) |
+		((pwrctrl->reg_disp1_ddr_en_mask_b & 0x1) << 21) |
+		((pwrctrl->reg_disp2_apsrc_req_mask_b & 0x1) << 22) |
+		((pwrctrl->reg_disp2_ddr_en_mask_b & 0x1) << 23) |
+		((pwrctrl->reg_disp3_apsrc_req_mask_b & 0x1) << 24) |
+		((pwrctrl->reg_disp3_ddr_en_mask_b & 0x1) << 25) |
+		((pwrctrl->reg_infrasys_apsrc_req_mask_b & 0x1) << 26) |
+		((pwrctrl->reg_infrasys_ddr_en_mask_b & 0x1) << 27));
+
+	/* SPM_SRC4_MASK */
+	write32(&mtk_spm->spm_src4_mask, 0x1fc0000);
+
+	/* SPM_WAKEUP_EVENT_MASK */
+	write32(&mtk_spm->spm_wakeup_event_mask,
+		((pwrctrl->reg_wakeup_event_mask & 0xffffffff) << 0));
+
+	/* SPM_WAKEUP_EVENT_EXT_MASK */
+	write32(&mtk_spm->spm_wakeup_event_ext_mask,
+		((pwrctrl->reg_ext_wakeup_event_mask & 0xffffffff) << 0));
+
+	/* Auto-gen End */
+}
+
+static void spm_register_init(void)
+{
+	/* Enable register control */
+	write32(&mtk_spm->poweron_config_set,
+		SPM_REGWR_CFG_KEY | BCLK_CG_EN_LSB);
+
+	/* Init power control register */
+	write32(&mtk_spm->spm_power_on_val1, POWER_ON_VAL1_DEF);
+	write32(&mtk_spm->pcm_pwr_io_en, 0);
+
+	/* Reset PCM */
+	write32(&mtk_spm->pcm_con0,
+		SPM_REGWR_CFG_KEY | PCM_CK_EN_LSB | PCM_SW_RESET_LSB);
+	write32(&mtk_spm->pcm_con0, SPM_REGWR_CFG_KEY | PCM_CK_EN_LSB);
+	write32(&mtk_spm->pcm_con1,
+		SPM_REGWR_CFG_KEY | REG_EVENT_LOCK_EN_LSB |
+		REG_SPM_SRAM_ISOINT_B_LSB | RG_AHBMIF_APBEN_LSB |
+		REG_MD32_APB_INTERNAL_EN_LSB);
+
+	/* Initial SPM CLK control register */
+	SET32_BITFIELDS(&mtk_spm->spm_clk_con,
+			REG_SYSCLK1_SRC_MD2_SRCCLKENA, 1);
+
+	/* Clean wakeup event raw status */
+	write32(&mtk_spm->spm_wakeup_event_mask, SPM_WAKEUP_EVENT_MASK_DEF);
+
+	/* Clean ISR status */
+	write32(&mtk_spm->spm_irq_mask, ISRM_ALL);
+	write32(&mtk_spm->spm_irq_sta, ISRC_ALL);
+	write32(&mtk_spm->spm_swint_clr, PCM_SW_INT_ALL);
+
+	/* Init r7 with POWER_ON_VAL1 */
+	write32(&mtk_spm->pcm_reg_data_ini,
+		read32(&mtk_spm->spm_power_on_val1));
+	write32(&mtk_spm->pcm_pwr_io_en, PCM_RF_SYNC_R7);
+	write32(&mtk_spm->pcm_pwr_io_en, 0);
+
+	/* Configure ARMPLL Control Mode for MCDI */
+	write32(&mtk_spm->armpll_clk_sel, ARMPLL_CLK_SEL_DEF);
+
+	/* Init for SPM Resource ACK */
+	write32(&mtk_spm->spm_resource_ack_con0, SPM_RESOURCE_ACK_CON0_DEF);
+	write32(&mtk_spm->spm_resource_ack_con1, SPM_RESOURCE_ACK_CON1_DEF);
+	write32(&mtk_spm->spm_resource_ack_con2, SPM_RESOURCE_ACK_CON2_DEF);
+	write32(&mtk_spm->spm_resource_ack_con3, SPM_RESOURCE_ACK_CON3_DEF);
+
+	/* Init VCORE DVFS Status */
+	SET32_BITFIELDS(&mtk_spm->spm_dvfs_misc,
+			SPM_DVFS_FORCE_ENABLE_LSB, 0,
+			SPM_DVFSRC_ENABLE_LSB, 1);
+	write32(&mtk_spm->spm_dvfs_level, SPM_DVFS_LEVEL_DEF);
+	write32(&mtk_spm->spm_dvs_dfs_level, SPM_DVS_DFS_LEVEL_DEF);
+
+}
+
+static void spm_set_sysclk_settle(void)
+{
+	write32(&mtk_spm->spm_clk_settle, SPM_SYSCLK_SETTLE);
+}
+
+static void spm_code_swapping(void)
+{
+	u32 mask;
+
+	mask = read32(&mtk_spm->spm_wakeup_event_mask);
+	write32(&mtk_spm->spm_wakeup_event_mask,
+		mask & ~SPM_WAKEUP_EVENT_MASK_BIT0);
+	write32(&mtk_spm->spm_cpu_wakeup_event, 1);
+	write32(&mtk_spm->spm_cpu_wakeup_event, 0);
+	write32(&mtk_spm->spm_wakeup_event_mask, mask);
+}
+
+static void spm_reset_and_init_pcm(void)
+{
+	bool first_load_fw = true;
+
+	/* Check the SPM FW is run or not */
+	if (read32(&mtk_spm->md32pcm_cfgreg_sw_rstn) &
+	    MD32PCM_CFGREG_SW_RSTN_RUN)
+		first_load_fw = false;
+
+	if (!first_load_fw) {
+		spm_code_swapping();
+		/* Backup PCM r0 -> SPM_POWER_ON_VAL0 before reset PCM */
+		write32(&mtk_spm->spm_power_on_val0,
+			read32(&mtk_spm->pcm_reg0_data));
+	}
+
+	/* Disable r0 and r7 to control power */
+	write32(&mtk_spm->pcm_pwr_io_en, 0);
+
+	/* Disable pcm timer after leaving FW */
+	clrsetbits32(&mtk_spm->pcm_con1,
+		     RG_PCM_TIMER_EN_LSB, SPM_REGWR_CFG_KEY);
+
+	/* Reset PCM */
+	write32(&mtk_spm->pcm_con0,
+		SPM_REGWR_CFG_KEY | PCM_CK_EN_LSB | PCM_SW_RESET_LSB);
+	write32(&mtk_spm->pcm_con0, SPM_REGWR_CFG_KEY | PCM_CK_EN_LSB);
+
+	/* Init PCM_CON1 (disable PCM timer but keep PCM WDT setting) */
+	clrsetbits32(&mtk_spm->pcm_con1, ~RG_PCM_WDT_WAKE_LSB,
+		     SPM_REGWR_CFG_KEY | REG_EVENT_LOCK_EN_LSB |
+		     REG_SPM_SRAM_ISOINT_B_LSB | RG_AHBMIF_APBEN_LSB |
+		     REG_MD32_APB_INTERNAL_EN_LSB);
+}
+
+static void spm_kick_im_to_fetch(const struct dyna_load_pcm *pcm)
+{
+	uintptr_t ptr;
+	u32 dmem_words;
+	u32 pmem_words;
+	u32 total_words;
+	u32 pmem_start;
+	u32 dmem_start;
+
+	ptr = (uintptr_t)pcm->buf + SPM_SYSTEM_BASE_OFFSET;
+	pmem_words = pcm->desc.pmem_words;
+	total_words = pcm->desc.total_words;
+	dmem_words = total_words - pmem_words;
+	pmem_start = pcm->desc.pmem_start;
+	dmem_start = pcm->desc.dmem_start;
+
+	printk(BIOS_DEBUG, "%s: ptr = %#lx, pmem/dmem words = %#x/%#x\n",
+	       __func__, (long)ptr, pmem_words, dmem_words);
+
+	/* DMA needs 16-byte aligned source data. */
+	assert(ptr % 16 == 0);
+
+	write32(&mtk_spm->md32pcm_dma0_src, ptr);
+	write32(&mtk_spm->md32pcm_dma0_dst, pmem_start);
+	write32(&mtk_spm->md32pcm_dma0_wppt, pmem_words);
+	write32(&mtk_spm->md32pcm_dma0_wpto, dmem_start);
+	write32(&mtk_spm->md32pcm_dma0_count, total_words);
+	write32(&mtk_spm->md32pcm_dma0_con, MD32PCM_DMA0_CON_VAL);
+	write32(&mtk_spm->md32pcm_dma0_start, MD32PCM_DMA0_START_VAL);
+
+	setbits32(&mtk_spm->pcm_con0, SPM_REGWR_CFG_KEY | PCM_CK_EN_LSB);
+}
+
+static void spm_init_pcm_register(void)
+{
+	/* Init r0 with POWER_ON_VAL0 */
+	write32(&mtk_spm->pcm_reg_data_ini,
+		read32(&mtk_spm->spm_power_on_val0));
+	write32(&mtk_spm->pcm_pwr_io_en, PCM_RF_SYNC_R0);
+	write32(&mtk_spm->pcm_pwr_io_en, 0);
+
+	/* Init r7 with POWER_ON_VAL1 */
+	write32(&mtk_spm->pcm_reg_data_ini,
+		read32(&mtk_spm->spm_power_on_val1));
+	write32(&mtk_spm->pcm_pwr_io_en, PCM_RF_SYNC_R7);
+	write32(&mtk_spm->pcm_pwr_io_en, 0);
+}
+
+static void spm_set_wakeup_event(const struct pwr_ctrl *pwrctrl)
+{
+	u32 val, mask;
+
+	/* Toggle event counter clear */
+	setbits32(&mtk_spm->pcm_con1,
+		  SPM_REGWR_CFG_KEY | SPM_EVENT_COUNTER_CLR_LSB);
+
+	/* Toggle for reset SYS TIMER start point */
+	SET32_BITFIELDS(&mtk_spm->sys_timer_con,
+			SYS_TIMER_START_EN_LSB, 1);
+
+	if (pwrctrl->timer_val_cust == 0)
+		val = pwrctrl->timer_val ? pwrctrl->timer_val : PCM_TIMER_MAX;
+	else
+		val = pwrctrl->timer_val_cust;
+
+	write32(&mtk_spm->pcm_timer_val, val);
+
+	/* Disable pcm timer */
+	clrsetbits32(&mtk_spm->pcm_con1,
+		     RG_PCM_TIMER_EN_LSB, SPM_REGWR_CFG_KEY);
+
+	/* Unmask AP wakeup source */
+	if (pwrctrl->wake_src_cust == 0)
+		mask = pwrctrl->wake_src;
+	else
+		mask = pwrctrl->wake_src_cust;
+
+	write32(&mtk_spm->spm_wakeup_event_mask, ~mask);
+
+	/* Unmask SPM ISR */
+	SET32_BITFIELDS(&mtk_spm->spm_irq_mask,
+			ISRM_TWAM_BF, 1,
+			ISRM_RET_IRQ_AUX_BF, 0x3ff);
+
+	/* Toggle event counter clear */
+	clrsetbits32(&mtk_spm->pcm_con1,
+		     SPM_EVENT_COUNTER_CLR_LSB, SPM_REGWR_CFG_KEY);
+
+	/* Toggle for reset SYS TIMER start point */
+	SET32_BITFIELDS(&mtk_spm->sys_timer_con,
+			SYS_TIMER_START_EN_LSB, 0);
+}
+
+static void spm_set_pcm_flags(const struct pwr_ctrl *pwrctrl)
+{
+	u32 pcm_flags = pwrctrl->pcm_flags, pcm_flags1 = pwrctrl->pcm_flags1;
+
+	/* Set PCM flags and data */
+	if (pwrctrl->pcm_flags_cust_clr != 0)
+		pcm_flags &= ~pwrctrl->pcm_flags_cust_clr;
+	if (pwrctrl->pcm_flags_cust_set != 0)
+		pcm_flags |= pwrctrl->pcm_flags_cust_set;
+	if (pwrctrl->pcm_flags1_cust_clr != 0)
+		pcm_flags1 &= ~pwrctrl->pcm_flags1_cust_clr;
+	if (pwrctrl->pcm_flags1_cust_set != 0)
+		pcm_flags1 |= pwrctrl->pcm_flags1_cust_set;
+
+	write32(&mtk_spm->spm_sw_flag_0, pcm_flags);
+	write32(&mtk_spm->spm_sw_flag_1, pcm_flags1);
+	write32(&mtk_spm->spm_sw_rsv_7, pcm_flags);
+	write32(&mtk_spm->spm_sw_rsv_8, pcm_flags1);
+}
+
+static void spm_kick_pcm_to_run(const struct pwr_ctrl *pwrctrl)
+{
+	/* Waiting for loading SPMFW done*/
+	while (read32(&mtk_spm->md32pcm_dma0_rlct) != 0x0)
+		;
+
+	/* Init register to match PCM expectation */
+	write32(&mtk_spm->spm_bus_protect_mask_b, SPM_BUS_PROTECT_MASK_B_DEF);
+	write32(&mtk_spm->spm_bus_protect2_mask_b,
+		SPM_BUS_PROTECT2_MASK_B_DEF);
+	write32(&mtk_spm->pcm_reg_data_ini, 0);
+
+	spm_set_pcm_flags(pwrctrl);
+
+	/* Kick PCM to run (only toggle PCM_KICK) */
+	setbits32(&mtk_spm->pcm_con0, SPM_REGWR_CFG_KEY | PCM_CK_EN_LSB);
+
+	/* Reset md32pcm */
+	SET32_BITFIELDS(&mtk_spm->md32pcm_cfgreg_sw_rstn,
+			MD32PCM_CFGREG_SW_RSTN_RESET, 1);
+
+	/* Waiting for SPM init done */
+	udelay(SPM_INIT_DONE_US);
+}
+
+static void reset_spm(struct mtk_mcu *mcu)
+{
+	struct dyna_load_pcm *pcm = (struct dyna_load_pcm *)mcu->priv;
+
+	spm_parse_firmware(mcu);
+	spm_reset_and_init_pcm();
+	spm_kick_im_to_fetch(pcm);
+	spm_init_pcm_register();
+	spm_set_wakeup_event(&spm_init_ctrl);
+	spm_kick_pcm_to_run(&spm_init_ctrl);
+}
+
+static struct mtk_mcu spm = {
+	.firmware_name = CONFIG_SPM_FIRMWARE,
+	.reset = reset_spm,
+};
+
+int spm_init(void)
+{
+	struct dyna_load_pcm pcm;
+	struct stopwatch sw;
+
+	stopwatch_init(&sw);
+
+	spm_register_init();
+	spm_set_power_control(&spm_init_ctrl);
+	spm_set_sysclk_settle();
+
+	spm.load_buffer = _dram_dma;
+	spm.buffer_size = REGION_SIZE(dram_dma);
+	spm.priv = (void *)&pcm;
+
+	if (mtk_init_mcu(&spm)) {
+		printk(BIOS_ERR, "SPM: %s: failed in mtk_init_mcu\n", __func__);
+		return -1;
+	}
+
+	printk(BIOS_INFO, "SPM: %s done in %ld msecs, spm pc = %#x\n",
+	       __func__, stopwatch_duration_msecs(&sw),
+	       read32(&mtk_spm->md32pcm_pc));
+
+	return 0;
+}