Samarth Parikh | 59cfa13 | 2017-11-23 14:23:21 +0530 | [diff] [blame] | 1 | /* |
Aditya Angadi | 7b424ba | 2019-12-31 10:14:32 +0530 | [diff] [blame] | 2 | * Copyright (c) 2014-2020, ARM Limited and Contributors. All rights reserved. |
Samarth Parikh | 59cfa13 | 2017-11-23 14:23:21 +0530 | [diff] [blame] | 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
Samarth Parikh | 59cfa13 | 2017-11-23 14:23:21 +0530 | [diff] [blame] | 7 | #include <platform_def.h> |
Antonio Nino Diaz | e0f9063 | 2018-12-14 00:18:21 +0000 | [diff] [blame] | 8 | |
| 9 | #include <arch_helpers.h> |
Antonio Nino Diaz | 1b0c6f1 | 2019-01-23 21:08:43 +0000 | [diff] [blame] | 10 | #include <drivers/arm/css/css_mhu_doorbell.h> |
Antonio Nino Diaz | c30db5b | 2019-01-23 20:37:32 +0000 | [diff] [blame] | 11 | #include <drivers/arm/css/scmi.h> |
Antonio Nino Diaz | e0f9063 | 2018-12-14 00:18:21 +0000 | [diff] [blame] | 12 | |
Roberto Vargas | 85664f5 | 2018-02-12 12:36:17 +0000 | [diff] [blame] | 13 | void mhu_ring_doorbell(struct scmi_channel_plat_info *plat_info) |
Samarth Parikh | 59cfa13 | 2017-11-23 14:23:21 +0530 | [diff] [blame] | 14 | { |
| 15 | MHU_RING_DOORBELL(plat_info->db_reg_addr, |
| 16 | plat_info->db_modify_mask, |
| 17 | plat_info->db_preserve_mask); |
| 18 | return; |
| 19 | } |
| 20 | |
Roberto Vargas | 85664f5 | 2018-02-12 12:36:17 +0000 | [diff] [blame] | 21 | void mhuv2_ring_doorbell(struct scmi_channel_plat_info *plat_info) |
Samarth Parikh | 59cfa13 | 2017-11-23 14:23:21 +0530 | [diff] [blame] | 22 | { |
Aditya Angadi | 7b424ba | 2019-12-31 10:14:32 +0530 | [diff] [blame] | 23 | uintptr_t mhuv2_base = plat_info->db_reg_addr & MHU_V2_FRAME_BASE_MASK; |
| 24 | |
Samarth Parikh | 59cfa13 | 2017-11-23 14:23:21 +0530 | [diff] [blame] | 25 | /* wake receiver */ |
Aditya Angadi | 7b424ba | 2019-12-31 10:14:32 +0530 | [diff] [blame] | 26 | MHU_V2_ACCESS_REQUEST(mhuv2_base); |
Samarth Parikh | 59cfa13 | 2017-11-23 14:23:21 +0530 | [diff] [blame] | 27 | |
| 28 | /* wait for receiver to acknowledge its ready */ |
Aditya Angadi | 7b424ba | 2019-12-31 10:14:32 +0530 | [diff] [blame] | 29 | while (MHU_V2_IS_ACCESS_READY(mhuv2_base) == 0) |
Samarth Parikh | 59cfa13 | 2017-11-23 14:23:21 +0530 | [diff] [blame] | 30 | ; |
| 31 | |
| 32 | MHU_RING_DOORBELL(plat_info->db_reg_addr, |
| 33 | plat_info->db_modify_mask, |
| 34 | plat_info->db_preserve_mask); |
| 35 | |
Paul Beesley | 1fbc97b | 2019-01-11 18:26:51 +0000 | [diff] [blame] | 36 | /* clear the access request for the receiver */ |
Aditya Angadi | 7b424ba | 2019-12-31 10:14:32 +0530 | [diff] [blame] | 37 | MHU_V2_CLEAR_REQUEST(mhuv2_base); |
Samarth Parikh | 59cfa13 | 2017-11-23 14:23:21 +0530 | [diff] [blame] | 38 | |
| 39 | return; |
| 40 | } |