2 * GTBUS initialisation for sun9i
4 * (C) Copyright 2016 Theobroma Systems Design und Consulting GmbH
5 * Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
7 * SPDX-License-Identifier: GPL-2.0+
12 #include <asm/arch/gtbus_sun9i.h>
13 #include <asm/arch/sys_proto.h>
15 #ifdef CONFIG_SPL_BUILD
19 struct sunxi_gtbus_reg * const gtbus =
20 (struct sunxi_gtbus_reg *)SUNXI_GTBUS_BASE;
23 * We use the same setting that Allwinner used in Boot0 for now.
24 * It may be advantageous to adjust these for various workloads
25 * (e.g. headless use cases that focus on IO throughput).
27 writel((GT_PRIO_HIGH << GT_PORT_FE0) |
28 (GT_PRIO_HIGH << GT_PORT_BE1) |
29 (GT_PRIO_HIGH << GT_PORT_BE2) |
30 (GT_PRIO_HIGH << GT_PORT_IEP0) |
31 (GT_PRIO_HIGH << GT_PORT_FE1) |
32 (GT_PRIO_HIGH << GT_PORT_BE0) |
33 (GT_PRIO_HIGH << GT_PORT_FE2) |
34 (GT_PRIO_HIGH << GT_PORT_IEP1),
35 >bus->mst_read_prio_cfg[0]);
37 writel(GP_MST_CFG_DEFAULT, >bus->mst_cfg[GT_PORT_FE0]);
38 writel(GP_MST_CFG_DEFAULT, >bus->mst_cfg[GT_PORT_FE0]);
39 writel(GP_MST_CFG_DEFAULT, >bus->mst_cfg[GT_PORT_BE1]);
40 writel(GP_MST_CFG_DEFAULT, >bus->mst_cfg[GT_PORT_BE2]);
41 writel(GP_MST_CFG_DEFAULT, >bus->mst_cfg[GT_PORT_IEP0]);
42 writel(GP_MST_CFG_DEFAULT, >bus->mst_cfg[GT_PORT_FE1]);
43 writel(GP_MST_CFG_DEFAULT, >bus->mst_cfg[GT_PORT_BE0]);
44 writel(GP_MST_CFG_DEFAULT, >bus->mst_cfg[GT_PORT_FE2]);
45 writel(GP_MST_CFG_DEFAULT, >bus->mst_cfg[GT_PORT_IEP1]);