gtbus_sun9i.c
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/*
* GTBUS initialisation for sun9i
*
* (C) Copyright 2016 Theobroma Systems Design und Consulting GmbH
* Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/gtbus_sun9i.h>
#include <asm/arch/sys_proto.h>
#ifdef CONFIG_SPL_BUILD
void gtbus_init(void)
{
struct sunxi_gtbus_reg * const gtbus =
(struct sunxi_gtbus_reg *)SUNXI_GTBUS_BASE;
/*
* We use the same setting that Allwinner used in Boot0 for now.
* It may be advantageous to adjust these for various workloads
* (e.g. headless use cases that focus on IO throughput).
*/
writel((GT_PRIO_HIGH << GT_PORT_FE0) |
(GT_PRIO_HIGH << GT_PORT_BE1) |
(GT_PRIO_HIGH << GT_PORT_BE2) |
(GT_PRIO_HIGH << GT_PORT_IEP0) |
(GT_PRIO_HIGH << GT_PORT_FE1) |
(GT_PRIO_HIGH << GT_PORT_BE0) |
(GT_PRIO_HIGH << GT_PORT_FE2) |
(GT_PRIO_HIGH << GT_PORT_IEP1),
>bus->mst_read_prio_cfg[0]);
writel(GP_MST_CFG_DEFAULT, >bus->mst_cfg[GT_PORT_FE0]);
writel(GP_MST_CFG_DEFAULT, >bus->mst_cfg[GT_PORT_FE0]);
writel(GP_MST_CFG_DEFAULT, >bus->mst_cfg[GT_PORT_BE1]);
writel(GP_MST_CFG_DEFAULT, >bus->mst_cfg[GT_PORT_BE2]);
writel(GP_MST_CFG_DEFAULT, >bus->mst_cfg[GT_PORT_IEP0]);
writel(GP_MST_CFG_DEFAULT, >bus->mst_cfg[GT_PORT_FE1]);
writel(GP_MST_CFG_DEFAULT, >bus->mst_cfg[GT_PORT_BE0]);
writel(GP_MST_CFG_DEFAULT, >bus->mst_cfg[GT_PORT_FE2]);
writel(GP_MST_CFG_DEFAULT, >bus->mst_cfg[GT_PORT_IEP1]);
}
#endif