| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * GTBUS initialisation for sun9i |
| * |
| * (C) Copyright 2016 Theobroma Systems Design und Consulting GmbH |
| * Philipp Tomsich <philipp.tomsich@theobroma-systems.com> |
| */ |
| |
| #include <asm/io.h> |
| #include <asm/arch/cpu.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 |