| Samarth Parikh | 59cfa13 | 2017-11-23 14:23:21 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2014-2018, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #ifndef CSS_MHU_DOORBELL_H |
| 8 | #define CSS_MHU_DOORBELL_H |
| 9 | |
| 10 | #include <mmio.h> |
| 11 | #include <stdint.h> |
| 12 | |
| 13 | /* MHUv2 Base Address */ |
| 14 | #define MHUV2_BASE_ADDR PLAT_CSS_MHU_BASE |
| 15 | |
| 16 | /* MHUv2 Control Registers Offsets */ |
| 17 | #define MHU_V2_MSG_NO_CAP_OFFSET 0xF80 |
| 18 | #define MHU_V2_ACCESS_REQ_OFFSET 0xF88 |
| 19 | #define MHU_V2_ACCESS_READY_OFFSET 0xF8C |
| 20 | |
| 21 | #define SENDER_REG_STAT(CHANNEL) (0x20 * (CHANNEL)) |
| 22 | #define SENDER_REG_SET(CHANNEL) (0x20 * (CHANNEL)) + 0xC |
| 23 | |
| 24 | /* Helper macro to ring doorbell */ |
| 25 | #define MHU_RING_DOORBELL(addr, modify_mask, preserve_mask) do { \ |
| 26 | uint32_t db = mmio_read_32(addr) & (preserve_mask); \ |
| 27 | mmio_write_32(addr, db | (modify_mask)); \ |
| 28 | } while (0) |
| 29 | |
| 30 | #define MHU_V2_ACCESS_REQUEST(addr) \ |
| 31 | mmio_write_32((addr) + MHU_V2_ACCESS_REQ_OFFSET, 0x1) |
| 32 | |
| 33 | #define MHU_V2_CLEAR_REQUEST(addr) \ |
| 34 | mmio_write_32((addr) + MHU_V2_ACCESS_REQ_OFFSET, 0x0) |
| 35 | |
| 36 | #define MHU_V2_IS_ACCESS_READY(addr) \ |
| 37 | (mmio_read_32((addr) + MHU_V2_ACCESS_READY_OFFSET) & 0x1) |
| 38 | |
| 39 | struct scmi_channel_plat_info; |
| 40 | void mhu_ring_doorbell(struct scmi_channel_plat_info *plat_info); |
| 41 | void mhuv2_ring_doorbell(struct scmi_channel_plat_info *plat_info); |
| 42 | |
| 43 | #endif /* CSS_MHU_DOORBELL_H */ |