From c00311893d4bffb43b3f023259120d9dc5f78e36 Mon Sep 17 00:00:00 2001 From: Andre Przywara Date: Tue, 9 Jul 2019 13:54:56 +0100 Subject: rpi3: Move VC mailbox driver into generic drivers directory To allow sharing the driver between the RPi3 and RPi4, move the mailbox driver into the generic driver directory. Change-Id: I463e49acf82b02bf004f3d56482b7791f3020bc0 Signed-off-by: Andre Przywara --- include/drivers/rpi3/mailbox/rpi3_mbox.h | 39 ++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 include/drivers/rpi3/mailbox/rpi3_mbox.h (limited to 'include') diff --git a/include/drivers/rpi3/mailbox/rpi3_mbox.h b/include/drivers/rpi3/mailbox/rpi3_mbox.h new file mode 100644 index 00000000..c1074402 --- /dev/null +++ b/include/drivers/rpi3/mailbox/rpi3_mbox.h @@ -0,0 +1,39 @@ +/* + * Copyright (c) 2019, Arm Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef RPI3_MBOX_H +#define RPI3_MBOX_H + +#include + +/* This struct must be aligned to 16 bytes */ +typedef struct __packed __aligned(16) rpi3_mbox_request { + uint32_t size; /* Buffer size in bytes */ + uint32_t code; /* Request/response code */ + uint32_t tags[0]; +} rpi3_mbox_request_t; + +#define RPI3_MBOX_BUFFER_SIZE U(256) + +/* Constants to perform a request/check the status of a request. */ +#define RPI3_MBOX_PROCESS_REQUEST U(0x00000000) +#define RPI3_MBOX_REQUEST_SUCCESSFUL U(0x80000000) +#define RPI3_MBOX_REQUEST_ERROR U(0x80000001) + +/* Command constants */ +#define RPI3_TAG_HARDWARE_GET_BOARD_REVISION U(0x00010002) +#define RPI3_TAG_END U(0x00000000) + +#define RPI3_TAG_REQUEST U(0x00000000) +#define RPI3_TAG_IS_RESPONSE U(0x80000000) /* Set if response */ +#define RPI3_TAG_RESPONSE_LENGTH_MASK U(0x7FFFFFFF) + +#define RPI3_CHANNEL_ARM_TO_VC U(0x8) +#define RPI3_CHANNEL_MASK U(0xF) + +void rpi3_vc_mailbox_request_send(rpi3_mbox_request_t *req, int req_size); + +#endif -- cgit v1.2.3