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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 <andre.przywara@arm.com>
This commit is contained in:
Andre Przywara
parent
4666d04648
commit
c00311893d
5 changed files with 179 additions and 149 deletions
82
drivers/rpi3/mailbox/rpi3_mbox.c
Normal file
82
drivers/rpi3/mailbox/rpi3_mbox.c
Normal file
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@ -0,0 +1,82 @@
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/*
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* Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <platform_def.h>
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#include <arch_helpers.h>
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#include <common/debug.h>
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#include <lib/mmio.h>
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#include <rpi_hw.h>
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#include <drivers/rpi3/mailbox/rpi3_mbox.h>
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#define RPI3_MAILBOX_MAX_RETRIES U(1000000)
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/*******************************************************************************
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* Routine to send requests to the VideoCore using the mailboxes.
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******************************************************************************/
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void rpi3_vc_mailbox_request_send(rpi3_mbox_request_t *req, int req_size)
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{
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uint32_t st, data;
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uintptr_t resp_addr, addr;
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unsigned int retries;
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/* This is the location of the request buffer */
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addr = (uintptr_t)req;
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/* Make sure that the changes are seen by the VideoCore */
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flush_dcache_range(addr, req_size);
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/* Wait until the outbound mailbox is empty */
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retries = 0U;
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do {
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st = mmio_read_32(RPI3_MBOX_BASE + RPI3_MBOX1_STATUS_OFFSET);
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retries++;
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if (retries == RPI3_MAILBOX_MAX_RETRIES) {
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ERROR("rpi3: mbox: Send request timeout\n");
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return;
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}
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} while ((st & RPI3_MBOX_STATUS_EMPTY_MASK) == 0U);
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/* Send base address of this message to start request */
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mmio_write_32(RPI3_MBOX_BASE + RPI3_MBOX1_WRITE_OFFSET,
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RPI3_CHANNEL_ARM_TO_VC | (uint32_t) addr);
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/* Wait until the inbound mailbox isn't empty */
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retries = 0U;
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do {
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st = mmio_read_32(RPI3_MBOX_BASE + RPI3_MBOX0_STATUS_OFFSET);
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retries++;
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if (retries == RPI3_MAILBOX_MAX_RETRIES) {
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ERROR("rpi3: mbox: Receive response timeout\n");
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return;
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}
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} while ((st & RPI3_MBOX_STATUS_EMPTY_MASK) != 0U);
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/* Get location and channel */
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data = mmio_read_32(RPI3_MBOX_BASE + RPI3_MBOX0_READ_OFFSET);
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if ((data & RPI3_CHANNEL_MASK) != RPI3_CHANNEL_ARM_TO_VC) {
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ERROR("rpi3: mbox: Wrong channel: 0x%08x\n", data);
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panic();
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}
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resp_addr = (uintptr_t)(data & ~RPI3_CHANNEL_MASK);
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if (addr != resp_addr) {
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ERROR("rpi3: mbox: Unexpected address: 0x%08x\n", data);
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panic();
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}
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/* Make sure that the data seen by the CPU is up to date */
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inv_dcache_range(addr, req_size);
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}
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39
include/drivers/rpi3/mailbox/rpi3_mbox.h
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39
include/drivers/rpi3/mailbox/rpi3_mbox.h
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@ -0,0 +1,39 @@
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/*
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* Copyright (c) 2019, Arm Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef RPI3_MBOX_H
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#define RPI3_MBOX_H
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#include <stdint.h>
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/* This struct must be aligned to 16 bytes */
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typedef struct __packed __aligned(16) rpi3_mbox_request {
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uint32_t size; /* Buffer size in bytes */
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uint32_t code; /* Request/response code */
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uint32_t tags[0];
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} rpi3_mbox_request_t;
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#define RPI3_MBOX_BUFFER_SIZE U(256)
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/* Constants to perform a request/check the status of a request. */
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#define RPI3_MBOX_PROCESS_REQUEST U(0x00000000)
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#define RPI3_MBOX_REQUEST_SUCCESSFUL U(0x80000000)
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#define RPI3_MBOX_REQUEST_ERROR U(0x80000001)
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/* Command constants */
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#define RPI3_TAG_HARDWARE_GET_BOARD_REVISION U(0x00010002)
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#define RPI3_TAG_END U(0x00000000)
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#define RPI3_TAG_REQUEST U(0x00000000)
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#define RPI3_TAG_IS_RESPONSE U(0x80000000) /* Set if response */
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#define RPI3_TAG_RESPONSE_LENGTH_MASK U(0x7FFFFFFF)
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#define RPI3_CHANNEL_ARM_TO_VC U(0x8)
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#define RPI3_CHANNEL_MASK U(0xF)
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void rpi3_vc_mailbox_request_send(rpi3_mbox_request_t *req, int req_size);
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#endif
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@ -21,7 +21,8 @@ BL1_SOURCES += drivers/io/io_fip.c \
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plat/rpi/rpi3/aarch64/plat_helpers.S \
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plat/rpi/rpi3/rpi3_bl1_setup.c \
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plat/rpi/rpi3/rpi3_io_storage.c \
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plat/rpi/rpi3/rpi3_mbox.c
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drivers/rpi3/mailbox/rpi3_mbox.c \
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plat/rpi/rpi3/rpi_mbox_board.c
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BL2_SOURCES += common/desc_image_load.c \
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drivers/io/io_fip.c \
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@ -1,148 +0,0 @@
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/*
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* Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <assert.h>
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#include <platform_def.h>
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#include <arch_helpers.h>
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#include <common/debug.h>
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#include <lib/mmio.h>
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#include <rpi_hw.h>
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/* This struct must be aligned to 16 bytes */
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typedef struct __packed __aligned(16) rpi3_mbox_request {
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uint32_t size; /* Buffer size in bytes */
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uint32_t code; /* Request/response code */
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uint32_t tags[0];
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} rpi3_mbox_request_t;
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#define RPI3_MBOX_BUFFER_SIZE U(256)
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static uint8_t __aligned(16) rpi3_mbox_buffer[RPI3_MBOX_BUFFER_SIZE];
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/* Constants to perform a request/check the status of a request. */
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#define RPI3_MBOX_PROCESS_REQUEST U(0x00000000)
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#define RPI3_MBOX_REQUEST_SUCCESSFUL U(0x80000000)
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#define RPI3_MBOX_REQUEST_ERROR U(0x80000001)
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/* Command constants */
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#define RPI3_TAG_HARDWARE_GET_BOARD_REVISION U(0x00010002)
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#define RPI3_TAG_END U(0x00000000)
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#define RPI3_TAG_REQUEST U(0x00000000)
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#define RPI3_TAG_IS_RESPONSE U(0x80000000) /* Set if response */
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#define RPI3_TAG_RESPONSE_LENGTH_MASK U(0x7FFFFFFF)
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#define RPI3_CHANNEL_ARM_TO_VC U(0x8)
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#define RPI3_CHANNEL_MASK U(0xF)
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#define RPI3_MAILBOX_MAX_RETRIES U(1000000)
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/*******************************************************************************
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* Helpers to send requests to the VideoCore using the mailboxes.
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******************************************************************************/
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static void rpi3_vc_mailbox_request_send(void)
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{
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uint32_t st, data;
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uintptr_t resp_addr, addr;
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unsigned int retries;
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/* This is the location of the request buffer */
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addr = (uintptr_t) &rpi3_mbox_buffer;
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/* Make sure that the changes are seen by the VideoCore */
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flush_dcache_range(addr, RPI3_MBOX_BUFFER_SIZE);
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/* Wait until the outbound mailbox is empty */
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retries = 0U;
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do {
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st = mmio_read_32(RPI3_MBOX_BASE + RPI3_MBOX1_STATUS_OFFSET);
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retries++;
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if (retries == RPI3_MAILBOX_MAX_RETRIES) {
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ERROR("rpi3: mbox: Send request timeout\n");
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return;
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}
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} while ((st & RPI3_MBOX_STATUS_EMPTY_MASK) == 0U);
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/* Send base address of this message to start request */
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mmio_write_32(RPI3_MBOX_BASE + RPI3_MBOX1_WRITE_OFFSET,
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RPI3_CHANNEL_ARM_TO_VC | (uint32_t) addr);
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/* Wait until the inbound mailbox isn't empty */
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retries = 0U;
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do {
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st = mmio_read_32(RPI3_MBOX_BASE + RPI3_MBOX0_STATUS_OFFSET);
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retries++;
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if (retries == RPI3_MAILBOX_MAX_RETRIES) {
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ERROR("rpi3: mbox: Receive response timeout\n");
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return;
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}
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} while ((st & RPI3_MBOX_STATUS_EMPTY_MASK) != 0U);
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/* Get location and channel */
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data = mmio_read_32(RPI3_MBOX_BASE + RPI3_MBOX0_READ_OFFSET);
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if ((data & RPI3_CHANNEL_MASK) != RPI3_CHANNEL_ARM_TO_VC) {
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ERROR("rpi3: mbox: Wrong channel: 0x%08x\n", data);
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panic();
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}
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resp_addr = (uintptr_t)(data & ~RPI3_CHANNEL_MASK);
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if (addr != resp_addr) {
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ERROR("rpi3: mbox: Unexpected address: 0x%08x\n", data);
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panic();
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}
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/* Make sure that the data seen by the CPU is up to date */
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inv_dcache_range(addr, RPI3_MBOX_BUFFER_SIZE);
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}
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/*******************************************************************************
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* Request board revision. Returns the revision and 0 on success, -1 on error.
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******************************************************************************/
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int rpi3_vc_hardware_get_board_revision(uint32_t *revision)
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{
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uint32_t tag_request_size = sizeof(uint32_t);
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rpi3_mbox_request_t *req = (rpi3_mbox_request_t *) rpi3_mbox_buffer;
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assert(revision != NULL);
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VERBOSE("rpi3: mbox: Sending request at %p\n", (void *)req);
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req->size = sizeof(rpi3_mbox_buffer);
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req->code = RPI3_MBOX_PROCESS_REQUEST;
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req->tags[0] = RPI3_TAG_HARDWARE_GET_BOARD_REVISION;
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req->tags[1] = tag_request_size; /* Space available for the response */
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req->tags[2] = RPI3_TAG_REQUEST;
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req->tags[3] = 0; /* Placeholder for the response */
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req->tags[4] = RPI3_TAG_END;
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rpi3_vc_mailbox_request_send();
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if (req->code != RPI3_MBOX_REQUEST_SUCCESSFUL) {
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ERROR("rpi3: mbox: Code = 0x%08x\n", req->code);
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return -1;
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}
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if (req->tags[2] != (RPI3_TAG_IS_RESPONSE | tag_request_size)) {
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ERROR("rpi3: mbox: get board revision failed (0x%08x)\n",
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req->tags[2]);
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return -1;
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}
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*revision = req->tags[3];
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return 0;
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}
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56
plat/rpi/rpi3/rpi_mbox_board.c
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56
plat/rpi/rpi3/rpi_mbox_board.c
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@ -0,0 +1,56 @@
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/*
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* Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <assert.h>
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#include <platform_def.h>
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#include <arch_helpers.h>
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#include <drivers/rpi3/mailbox/rpi3_mbox.h>
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#define RPI3_MBOX_BUFFER_SIZE U(256)
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static uint8_t __aligned(16) rpi3_mbox_buffer[RPI3_MBOX_BUFFER_SIZE];
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/*******************************************************************************
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* Request board revision. Returns the revision and 0 on success, -1 on error.
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******************************************************************************/
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int rpi3_vc_hardware_get_board_revision(uint32_t *revision)
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{
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uint32_t tag_request_size = sizeof(uint32_t);
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rpi3_mbox_request_t *req = (rpi3_mbox_request_t *) rpi3_mbox_buffer;
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assert(revision != NULL);
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VERBOSE("rpi3: mbox: Sending request at %p\n", (void *)req);
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req->size = sizeof(rpi3_mbox_buffer);
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req->code = RPI3_MBOX_PROCESS_REQUEST;
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req->tags[0] = RPI3_TAG_HARDWARE_GET_BOARD_REVISION;
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req->tags[1] = tag_request_size; /* Space available for the response */
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req->tags[2] = RPI3_TAG_REQUEST;
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req->tags[3] = 0; /* Placeholder for the response */
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req->tags[4] = RPI3_TAG_END;
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rpi3_vc_mailbox_request_send(req, RPI3_MBOX_BUFFER_SIZE);
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if (req->code != RPI3_MBOX_REQUEST_SUCCESSFUL) {
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ERROR("rpi3: mbox: Code = 0x%08x\n", req->code);
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return -1;
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}
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if (req->tags[2] != (RPI3_TAG_IS_RESPONSE | tag_request_size)) {
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ERROR("rpi3: mbox: get board revision failed (0x%08x)\n",
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req->tags[2]);
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return -1;
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}
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*revision = req->tags[3];
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return 0;
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}
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