1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2018
4 * Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
5 */
6
7 #define LOG_CATEGORY UCLASS_AXI_EMUL
8
9 #include <common.h>
10 #include <axi.h>
11 #include <dm.h>
12 #include <log.h>
13 #include <dm/device-internal.h>
14 #include <asm/axi.h>
15
axi_sandbox_get_emul(struct udevice * bus,ulong address,enum axi_size_t size,struct udevice ** emulp)16 int axi_sandbox_get_emul(struct udevice *bus, ulong address,
17 enum axi_size_t size, struct udevice **emulp)
18 {
19 struct udevice *dev;
20 u32 reg[2];
21 uint offset;
22
23 switch (size) {
24 case AXI_SIZE_8:
25 offset = 1;
26 break;
27 case AXI_SIZE_16:
28 offset = 2;
29 break;
30 case AXI_SIZE_32:
31 offset = 4;
32 break;
33 default:
34 debug("%s: Unknown AXI transfer size '%d'", bus->name, size);
35 offset = 0;
36 }
37
38 /*
39 * Note: device_find_* don't activate the devices; they're activated
40 * as-needed below.
41 */
42 for (device_find_first_child(bus, &dev);
43 dev;
44 device_find_next_child(&dev)) {
45 int ret;
46
47 ret = dev_read_u32_array(dev, "reg", reg, ARRAY_SIZE(reg));
48 if (ret) {
49 debug("%s: Could not read 'reg' property of %s\n",
50 bus->name, dev->name);
51 continue;
52 }
53
54 /*
55 * Does the transfer's address fall into this device's address
56 * space?
57 */
58 if (address >= reg[0] && address <= reg[0] + reg[1] - offset) {
59 /* If yes, activate it... */
60 if (device_probe(dev)) {
61 debug("%s: Could not activate %s\n",
62 bus->name, dev->name);
63 return -ENODEV;
64 }
65
66 /* ...and return it */
67 *emulp = dev;
68 return 0;
69 }
70 }
71
72 return -ENODEV;
73 }
74
axi_get_store(struct udevice * dev,u8 ** storep)75 int axi_get_store(struct udevice *dev, u8 **storep)
76 {
77 struct axi_emul_ops *ops = axi_emul_get_ops(dev);
78
79 if (!ops->get_store)
80 return -ENOSYS;
81
82 return ops->get_store(dev, storep);
83 }
84
85 UCLASS_DRIVER(axi_emul) = {
86 .id = UCLASS_AXI_EMUL,
87 .name = "axi_emul",
88 };
89