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  * HP Spectre 360 Convertible devices do not expose the correct _ADR
20  * in the DSDT.
21  * Remap the bad _ADR values to the ones reported by hardware
22  */
23 static const struct adr_remap hp_spectre_360[] = {
24 	{
25 		0x000010025D070100,
26 		0x000020025D071100
27 	},
28 	{
29 		0x000110025d070100,
30 		0x000120025D130800
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 		0x00020025d071100,
43 		0x00021025d071500
44 	},
45 	/* rt711 on link1 */
46 	{
47 		0x000120025d130800,
48 		0x000120025d071100,
49 	},
50 	/* rt1308 on link2 */
51 	{
52 		0x000220025d071500,
53 		0x000220025d130800
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 Convertible"),
63 		},
64 		.driver_data = (void *)hp_spectre_360,
65 	},
66 	{
67 		.matches = {
68 			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc"),
69 			DMI_EXACT_MATCH(DMI_PRODUCT_SKU, "0A3E")
70 		},
71 		.driver_data = (void *)dell_sku_0A3E,
72 	},
73 	{}
74 };
75 
76 u64 sdw_dmi_override_adr(struct sdw_bus *bus, u64 addr)
77 {
78 	const struct dmi_system_id *dmi_id;
79 
80 	/* check if any address remap quirk applies */
81 	dmi_id = dmi_first_match(adr_remap_quirk_table);
82 	if (dmi_id) {
83 		struct adr_remap *map;
84 
85 		for (map = dmi_id->driver_data; map->adr; map++) {
86 			if (map->adr == addr) {
87 				dev_dbg(bus->dev, "remapped _ADR 0x%llx as 0x%llx\n",
88 					addr, map->remapped_adr);
89 				addr = map->remapped_adr;
90 				break;
91 			}
92 		}
93 	}
94 
95 	return addr;
96 }
97