1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Interconnect framework driver for i.MX8MQ SoC
4  *
5  * Copyright (c) 2019-2020, NXP
6  */
7 
8 #include <linux/module.h>
9 #include <linux/platform_device.h>
10 #include <linux/interconnect-provider.h>
11 #include <dt-bindings/interconnect/imx8mq.h>
12 
13 #include "imx.h"
14 
15 static const struct imx_icc_node_adj_desc imx8mq_dram_adj = {
16 	.bw_mul = 1,
17 	.bw_div = 4,
18 	.phandle_name = "fsl,ddrc",
19 };
20 
21 static const struct imx_icc_node_adj_desc imx8mq_noc_adj = {
22 	.bw_mul = 1,
23 	.bw_div = 4,
24 	.main_noc = true,
25 };
26 
27 /*
28  * Describe bus masters, slaves and connections between them
29  *
30  * This is a simplified subset of the bus diagram, there are several other
31  * PL301 nics which are skipped/merged into PL301_MAIN
32  */
33 static struct imx_icc_node_desc nodes[] = {
34 	DEFINE_BUS_INTERCONNECT("NOC", IMX8MQ_ICN_NOC, &imx8mq_noc_adj,
35 			IMX8MQ_ICS_DRAM, IMX8MQ_ICN_MAIN),
36 
37 	DEFINE_BUS_SLAVE("DRAM", IMX8MQ_ICS_DRAM, &imx8mq_dram_adj),
38 	DEFINE_BUS_SLAVE("OCRAM", IMX8MQ_ICS_OCRAM, NULL),
39 	DEFINE_BUS_MASTER("A53", IMX8MQ_ICM_A53, IMX8MQ_ICN_NOC),
40 
41 	/* VPUMIX */
42 	DEFINE_BUS_MASTER("VPU", IMX8MQ_ICM_VPU, IMX8MQ_ICN_VIDEO),
43 	DEFINE_BUS_INTERCONNECT("PL301_VIDEO", IMX8MQ_ICN_VIDEO, NULL, IMX8MQ_ICN_NOC),
44 
45 	/* GPUMIX */
46 	DEFINE_BUS_MASTER("GPU", IMX8MQ_ICM_GPU, IMX8MQ_ICN_GPU),
47 	DEFINE_BUS_INTERCONNECT("PL301_GPU", IMX8MQ_ICN_GPU, NULL, IMX8MQ_ICN_NOC),
48 
49 	/* DISPMIX (only for DCSS) */
50 	DEFINE_BUS_MASTER("DC", IMX8MQ_ICM_DCSS, IMX8MQ_ICN_DCSS),
51 	DEFINE_BUS_INTERCONNECT("PL301_DC", IMX8MQ_ICN_DCSS, NULL, IMX8MQ_ICN_NOC),
52 
53 	/* USBMIX */
54 	DEFINE_BUS_MASTER("USB1", IMX8MQ_ICM_USB1, IMX8MQ_ICN_USB),
55 	DEFINE_BUS_MASTER("USB2", IMX8MQ_ICM_USB2, IMX8MQ_ICN_USB),
56 	DEFINE_BUS_INTERCONNECT("PL301_USB", IMX8MQ_ICN_USB, NULL, IMX8MQ_ICN_NOC),
57 
58 	/* PL301_DISPLAY (IPs other than DCSS, inside SUPERMIX) */
59 	DEFINE_BUS_MASTER("CSI1", IMX8MQ_ICM_CSI1, IMX8MQ_ICN_DISPLAY),
60 	DEFINE_BUS_MASTER("CSI2", IMX8MQ_ICM_CSI2, IMX8MQ_ICN_DISPLAY),
61 	DEFINE_BUS_MASTER("LCDIF", IMX8MQ_ICM_LCDIF, IMX8MQ_ICN_DISPLAY),
62 	DEFINE_BUS_INTERCONNECT("PL301_DISPLAY", IMX8MQ_ICN_DISPLAY, NULL, IMX8MQ_ICN_MAIN),
63 
64 	/* AUDIO */
65 	DEFINE_BUS_MASTER("SDMA2", IMX8MQ_ICM_SDMA2, IMX8MQ_ICN_AUDIO),
66 	DEFINE_BUS_INTERCONNECT("PL301_AUDIO", IMX8MQ_ICN_AUDIO, NULL, IMX8MQ_ICN_DISPLAY),
67 
68 	/* ENET */
69 	DEFINE_BUS_MASTER("ENET", IMX8MQ_ICM_ENET, IMX8MQ_ICN_ENET),
70 	DEFINE_BUS_INTERCONNECT("PL301_ENET", IMX8MQ_ICN_ENET, NULL, IMX8MQ_ICN_MAIN),
71 
72 	/* OTHER */
73 	DEFINE_BUS_MASTER("SDMA1", IMX8MQ_ICM_SDMA1, IMX8MQ_ICN_MAIN),
74 	DEFINE_BUS_MASTER("NAND", IMX8MQ_ICM_NAND, IMX8MQ_ICN_MAIN),
75 	DEFINE_BUS_MASTER("USDHC1", IMX8MQ_ICM_USDHC1, IMX8MQ_ICN_MAIN),
76 	DEFINE_BUS_MASTER("USDHC2", IMX8MQ_ICM_USDHC2, IMX8MQ_ICN_MAIN),
77 	DEFINE_BUS_MASTER("PCIE1", IMX8MQ_ICM_PCIE1, IMX8MQ_ICN_MAIN),
78 	DEFINE_BUS_MASTER("PCIE2", IMX8MQ_ICM_PCIE2, IMX8MQ_ICN_MAIN),
79 	DEFINE_BUS_INTERCONNECT("PL301_MAIN", IMX8MQ_ICN_MAIN, NULL,
80 			IMX8MQ_ICN_NOC, IMX8MQ_ICS_OCRAM),
81 };
82 
imx8mq_icc_probe(struct platform_device * pdev)83 static int imx8mq_icc_probe(struct platform_device *pdev)
84 {
85 	return imx_icc_register(pdev, nodes, ARRAY_SIZE(nodes), NULL);
86 }
87 
imx8mq_icc_remove(struct platform_device * pdev)88 static int imx8mq_icc_remove(struct platform_device *pdev)
89 {
90 	imx_icc_unregister(pdev);
91 
92 	return 0;
93 }
94 
95 static struct platform_driver imx8mq_icc_driver = {
96 	.probe = imx8mq_icc_probe,
97 	.remove = imx8mq_icc_remove,
98 	.driver = {
99 		.name = "imx8mq-interconnect",
100 		.sync_state = icc_sync_state,
101 	},
102 };
103 
104 module_platform_driver(imx8mq_icc_driver);
105 MODULE_ALIAS("platform:imx8mq-interconnect");
106 MODULE_AUTHOR("Leonard Crestez <leonard.crestez@nxp.com>");
107 MODULE_LICENSE("GPL v2");
108