1*91f16700Schasinglulu /* 2*91f16700Schasinglulu * Copyright (c) 2014-2020, ARM Limited and Contributors. All rights reserved. 3*91f16700Schasinglulu * 4*91f16700Schasinglulu * SPDX-License-Identifier: BSD-3-Clause 5*91f16700Schasinglulu */ 6*91f16700Schasinglulu 7*91f16700Schasinglulu #include <platform_def.h> 8*91f16700Schasinglulu 9*91f16700Schasinglulu #include <arch_helpers.h> 10*91f16700Schasinglulu #include <drivers/arm/css/css_mhu_doorbell.h> 11*91f16700Schasinglulu #include <drivers/arm/css/scmi.h> 12*91f16700Schasinglulu 13*91f16700Schasinglulu void mhu_ring_doorbell(struct scmi_channel_plat_info *plat_info) 14*91f16700Schasinglulu { 15*91f16700Schasinglulu MHU_RING_DOORBELL(plat_info->db_reg_addr, 16*91f16700Schasinglulu plat_info->db_modify_mask, 17*91f16700Schasinglulu plat_info->db_preserve_mask); 18*91f16700Schasinglulu } 19*91f16700Schasinglulu 20*91f16700Schasinglulu void mhuv2_ring_doorbell(struct scmi_channel_plat_info *plat_info) 21*91f16700Schasinglulu { 22*91f16700Schasinglulu uintptr_t mhuv2_base = plat_info->db_reg_addr & MHU_V2_FRAME_BASE_MASK; 23*91f16700Schasinglulu 24*91f16700Schasinglulu /* wake receiver */ 25*91f16700Schasinglulu MHU_V2_ACCESS_REQUEST(mhuv2_base); 26*91f16700Schasinglulu 27*91f16700Schasinglulu /* wait for receiver to acknowledge its ready */ 28*91f16700Schasinglulu while (MHU_V2_IS_ACCESS_READY(mhuv2_base) == 0) 29*91f16700Schasinglulu ; 30*91f16700Schasinglulu 31*91f16700Schasinglulu MHU_RING_DOORBELL(plat_info->db_reg_addr, 32*91f16700Schasinglulu plat_info->db_modify_mask, 33*91f16700Schasinglulu plat_info->db_preserve_mask); 34*91f16700Schasinglulu 35*91f16700Schasinglulu /* clear the access request for the receiver */ 36*91f16700Schasinglulu MHU_V2_CLEAR_REQUEST(mhuv2_base); 37*91f16700Schasinglulu } 38