1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
2 // Copyright(c) 2021 Intel Corporation.
3 
4 /*
5  * Soundwire DMI quirks
6  */
7 
8 #include <linux/device.h>
9 #include <linux/dmi.h>
10 #include <linux/soundwire/sdw.h>
11 #include "bus.h"
12 
13 struct adr_remap {
14 	u64 adr;
15 	u64 remapped_adr;
16 };
17 
18 /*
19  * Some TigerLake devices based on an initial Intel BIOS do not expose
20  * the correct _ADR in the DSDT.
21  * Remap the bad _ADR values to the ones reported by hardware
22  */
23 static const struct adr_remap intel_tgl_bios[] = {
24 	{
25 		0x000010025D070100ull,
26 		0x000020025D071100ull
27 	},
28 	{
29 		0x000110025d070100ull,
30 		0x000120025D130800ull
31 	},
32 	{}
33 };
34 
35 /*
36  * The initial version of the Dell SKU 0A3E did not expose the devices
37  * on the correct links.
38  */
39 static const struct adr_remap dell_sku_0A3E[] = {
40 	/* rt715 on link0 */
41 	{
42 		0x00020025d071100ull,
43 		0x00021025d071500ull
44 	},
45 	/* rt711 on link1 */
46 	{
47 		0x000120025d130800ull,
48 		0x000120025d071100ull,
49 	},
50 	/* rt1308 on link2 */
51 	{
52 		0x000220025d071500ull,
53 		0x000220025d130800ull
54 	},
55 	{}
56 };
57 
58 static const struct dmi_system_id adr_remap_quirk_table[] = {
59 	{
60 		.matches = {
61 			DMI_MATCH(DMI_SYS_VENDOR, "HP"),
62 			DMI_MATCH(DMI_PRODUCT_NAME, "HP Spectre x360 Conv"),
63 		},
64 		.driver_data = (void *)intel_tgl_bios,
65 	},
66 	{
67 		/* quirk used for NUC15 'Bishop County' LAPBC510 and LAPBC710 skews */
68 		.matches = {
69 			DMI_MATCH(DMI_SYS_VENDOR, "Intel(R) Client Systems"),
70 			DMI_MATCH(DMI_PRODUCT_NAME, "LAPBC"),
71 		},
72 		.driver_data = (void *)intel_tgl_bios,
73 	},
74 	{
75 		.matches = {
76 			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc"),
77 			DMI_EXACT_MATCH(DMI_PRODUCT_SKU, "0A3E")
78 		},
79 		.driver_data = (void *)dell_sku_0A3E,
80 	},
81 	{}
82 };
83 
84 u64 sdw_dmi_override_adr(struct sdw_bus *bus, u64 addr)
85 {
86 	const struct dmi_system_id *dmi_id;
87 
88 	/* check if any address remap quirk applies */
89 	dmi_id = dmi_first_match(adr_remap_quirk_table);
90 	if (dmi_id) {
91 		struct adr_remap *map;
92 
93 		for (map = dmi_id->driver_data; map->adr; map++) {
94 			if (map->adr == addr) {
95 				dev_dbg(bus->dev, "remapped _ADR 0x%llx as 0x%llx\n",
96 					addr, map->remapped_adr);
97 				addr = map->remapped_adr;
98 				break;
99 			}
100 		}
101 	}
102 
103 	return addr;
104 }
105