1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright (c) 2014 Google, Inc
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include <common.h>
8*4882a593Smuzhiyun #include <dm.h>
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun struct simple_bus_plat {
11*4882a593Smuzhiyun u32 base;
12*4882a593Smuzhiyun u32 size;
13*4882a593Smuzhiyun u32 target;
14*4882a593Smuzhiyun };
15*4882a593Smuzhiyun
simple_bus_translate(struct udevice * dev,fdt_addr_t addr)16*4882a593Smuzhiyun fdt_addr_t simple_bus_translate(struct udevice *dev, fdt_addr_t addr)
17*4882a593Smuzhiyun {
18*4882a593Smuzhiyun struct simple_bus_plat *plat = dev_get_uclass_platdata(dev);
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun if (addr >= plat->base && addr < plat->base + plat->size)
21*4882a593Smuzhiyun addr = (addr - plat->base) + plat->target;
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun return addr;
24*4882a593Smuzhiyun }
25*4882a593Smuzhiyun
simple_bus_post_bind(struct udevice * dev)26*4882a593Smuzhiyun static int simple_bus_post_bind(struct udevice *dev)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun #if CONFIG_IS_ENABLED(OF_PLATDATA)
29*4882a593Smuzhiyun return 0;
30*4882a593Smuzhiyun #else
31*4882a593Smuzhiyun u32 cell[3];
32*4882a593Smuzhiyun int ret;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun ret = dev_read_u32_array(dev, "ranges", cell, ARRAY_SIZE(cell));
35*4882a593Smuzhiyun if (!ret) {
36*4882a593Smuzhiyun struct simple_bus_plat *plat = dev_get_uclass_platdata(dev);
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun plat->base = cell[0];
39*4882a593Smuzhiyun plat->target = cell[1];
40*4882a593Smuzhiyun plat->size = cell[2];
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun return dm_scan_fdt_dev(dev);
44*4882a593Smuzhiyun #endif
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun UCLASS_DRIVER(simple_bus) = {
48*4882a593Smuzhiyun .id = UCLASS_SIMPLE_BUS,
49*4882a593Smuzhiyun .name = "simple_bus",
50*4882a593Smuzhiyun .post_bind = simple_bus_post_bind,
51*4882a593Smuzhiyun .per_device_platdata_auto_alloc_size = sizeof(struct simple_bus_plat),
52*4882a593Smuzhiyun };
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun static const struct udevice_id generic_simple_bus_ids[] = {
55*4882a593Smuzhiyun { .compatible = "simple-bus" },
56*4882a593Smuzhiyun { .compatible = "simple-mfd" },
57*4882a593Smuzhiyun { }
58*4882a593Smuzhiyun };
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun U_BOOT_DRIVER(simple_bus_drv) = {
61*4882a593Smuzhiyun .name = "generic_simple_bus",
62*4882a593Smuzhiyun .id = UCLASS_SIMPLE_BUS,
63*4882a593Smuzhiyun .of_match = generic_simple_bus_ids,
64*4882a593Smuzhiyun };
65