drivers/soundwire/dmi-quirks.c

   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 }