1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Interconnect framework driver for i.MX8MN SoC
4 *
5 * Copyright (c) 2019-2020, NXP
6 */
7
8#include <linux/module.h>
9#include <linux/platform_device.h>
10#include <dt-bindings/interconnect/imx8mn.h>
11
12#include "imx.h"
13
14static const struct imx_icc_node_adj_desc imx8mn_dram_adj = {
15	.bw_mul = 1,
16	.bw_div = 4,
17	.phandle_name = "fsl,ddrc",
18};
19
20static const struct imx_icc_node_adj_desc imx8mn_noc_adj = {
21	.bw_mul = 1,
22	.bw_div = 4,
23	.main_noc = true,
24};
25
26/*
27 * Describe bus masters, slaves and connections between them
28 *
29 * This is a simplified subset of the bus diagram, there are several other
30 * PL301 nics which are skipped/merged into PL301_MAIN
31 */
32static struct imx_icc_node_desc nodes[] = {
33	DEFINE_BUS_INTERCONNECT("NOC", IMX8MN_ICN_NOC, &imx8mn_noc_adj,
34			IMX8MN_ICS_DRAM, IMX8MN_ICN_MAIN),
35
36	DEFINE_BUS_SLAVE("DRAM", IMX8MN_ICS_DRAM, &imx8mn_dram_adj),
37	DEFINE_BUS_SLAVE("OCRAM", IMX8MN_ICS_OCRAM, NULL),
38	DEFINE_BUS_MASTER("A53", IMX8MN_ICM_A53, IMX8MN_ICN_NOC),
39
40	/* GPUMIX */
41	DEFINE_BUS_MASTER("GPU", IMX8MN_ICM_GPU, IMX8MN_ICN_GPU),
42	DEFINE_BUS_INTERCONNECT("PL301_GPU", IMX8MN_ICN_GPU, NULL, IMX8MN_ICN_NOC),
43
44	/* DISPLAYMIX */
45	DEFINE_BUS_MASTER("CSI1", IMX8MN_ICM_CSI1, IMX8MN_ICN_MIPI),
46	DEFINE_BUS_MASTER("CSI2", IMX8MN_ICM_CSI2, IMX8MN_ICN_MIPI),
47	DEFINE_BUS_MASTER("ISI", IMX8MN_ICM_ISI, IMX8MN_ICN_MIPI),
48	DEFINE_BUS_MASTER("LCDIF", IMX8MN_ICM_LCDIF, IMX8MN_ICN_MIPI),
49	DEFINE_BUS_INTERCONNECT("PL301_MIPI", IMX8MN_ICN_MIPI, NULL, IMX8MN_ICN_NOC),
50
51	/* USB goes straight to NOC */
52	DEFINE_BUS_MASTER("USB", IMX8MN_ICM_USB, IMX8MN_ICN_NOC),
53
54	/* Audio */
55	DEFINE_BUS_MASTER("SDMA2", IMX8MN_ICM_SDMA2, IMX8MN_ICN_AUDIO),
56	DEFINE_BUS_MASTER("SDMA3", IMX8MN_ICM_SDMA3, IMX8MN_ICN_AUDIO),
57	DEFINE_BUS_INTERCONNECT("PL301_AUDIO", IMX8MN_ICN_AUDIO, NULL, IMX8MN_ICN_MAIN),
58
59	/* Ethernet */
60	DEFINE_BUS_MASTER("ENET", IMX8MN_ICM_ENET, IMX8MN_ICN_ENET),
61	DEFINE_BUS_INTERCONNECT("PL301_ENET", IMX8MN_ICN_ENET, NULL, IMX8MN_ICN_MAIN),
62
63	/* Other */
64	DEFINE_BUS_MASTER("SDMA1", IMX8MN_ICM_SDMA1, IMX8MN_ICN_MAIN),
65	DEFINE_BUS_MASTER("NAND", IMX8MN_ICM_NAND, IMX8MN_ICN_MAIN),
66	DEFINE_BUS_MASTER("USDHC1", IMX8MN_ICM_USDHC1, IMX8MN_ICN_MAIN),
67	DEFINE_BUS_MASTER("USDHC2", IMX8MN_ICM_USDHC2, IMX8MN_ICN_MAIN),
68	DEFINE_BUS_MASTER("USDHC3", IMX8MN_ICM_USDHC3, IMX8MN_ICN_MAIN),
69	DEFINE_BUS_INTERCONNECT("PL301_MAIN", IMX8MN_ICN_MAIN, NULL,
70			IMX8MN_ICN_NOC, IMX8MN_ICS_OCRAM),
71};
72
73static int imx8mn_icc_probe(struct platform_device *pdev)
74{
75	return imx_icc_register(pdev, nodes, ARRAY_SIZE(nodes), NULL);
76}
77
78static struct platform_driver imx8mn_icc_driver = {
79	.probe = imx8mn_icc_probe,
80	.remove_new = imx_icc_unregister,
81	.driver = {
82		.name = "imx8mn-interconnect",
83	},
84};
85
86module_platform_driver(imx8mn_icc_driver);
87MODULE_ALIAS("platform:imx8mn-interconnect");
88MODULE_AUTHOR("Leonard Crestez <leonard.crestez@nxp.com>");
89MODULE_LICENSE("GPL v2");
90