drivers/thunderbolt/quirks.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Thunderbolt driver - quirks
   4  *
   5  * Copyright (c) 2020 Mario Limonciello <mario.limonciello@dell.com>
   6  */
   7
   8 #include "tb.h"
   9
  10 static void quirk_force_power_link(struct tb_switch *sw)
  11 {
  12         sw->quirks |= QUIRK_FORCE_POWER_LINK_CONTROLLER;
  13 }
  14
  15 static void quirk_dp_credit_allocation(struct tb_switch *sw)
  16 {
  17         if (sw->credit_allocation && sw->min_dp_main_credits == 56) {
  18                 sw->min_dp_main_credits = 18;
  19                 tb_sw_dbg(sw, "quirked DP main: %u\n", sw->min_dp_main_credits);
  20         }
  21 }
  22
  23 static void quirk_clx_disable(struct tb_switch *sw)
  24 {
  25         sw->quirks |= QUIRK_NO_CLX;
  26         tb_sw_dbg(sw, "disabling CL states\n");
  27 }
  28
  29 static void quirk_usb3_maximum_bandwidth(struct tb_switch *sw)
  30 {
  31         struct tb_port *port;
  32
  33         tb_switch_for_each_port(sw, port) {
  34                 if (!tb_port_is_usb3_down(port))
  35                         continue;
  36                 port->max_bw = 16376;
  37                 tb_port_dbg(port, "USB3 maximum bandwidth limited to %u Mb/s\n",
  38                             port->max_bw);
  39         }
  40 }
  41
  42 struct tb_quirk {
  43         u16 hw_vendor_id;
  44         u16 hw_device_id;
  45         u16 vendor;
  46         u16 device;
  47         void (*hook)(struct tb_switch *sw);
  48 };
  49
  50 static const struct tb_quirk tb_quirks[] = {
  51         /* Dell WD19TB supports self-authentication on unplug */
  52         { 0x0000, 0x0000, 0x00d4, 0xb070, quirk_force_power_link },
  53         { 0x0000, 0x0000, 0x00d4, 0xb071, quirk_force_power_link },
  54         /*
  55          * Intel Goshen Ridge NVM 27 and before report wrong number of
  56          * DP buffers.
  57          */
  58         { 0x8087, 0x0b26, 0x0000, 0x0000, quirk_dp_credit_allocation },
  59         /*
  60          * Limit the maximum USB3 bandwidth for the following Intel USB4
  61          * host routers due to a hardware issue.
  62          */
  63         { 0x8087, PCI_DEVICE_ID_INTEL_ADL_NHI0, 0x0000, 0x0000,
  64                   quirk_usb3_maximum_bandwidth },
  65         { 0x8087, PCI_DEVICE_ID_INTEL_ADL_NHI1, 0x0000, 0x0000,
  66                   quirk_usb3_maximum_bandwidth },
  67         { 0x8087, PCI_DEVICE_ID_INTEL_RPL_NHI0, 0x0000, 0x0000,
  68                   quirk_usb3_maximum_bandwidth },
  69         { 0x8087, PCI_DEVICE_ID_INTEL_RPL_NHI1, 0x0000, 0x0000,
  70                   quirk_usb3_maximum_bandwidth },
  71         { 0x8087, PCI_DEVICE_ID_INTEL_MTL_M_NHI0, 0x0000, 0x0000,
  72                   quirk_usb3_maximum_bandwidth },
  73         { 0x8087, PCI_DEVICE_ID_INTEL_MTL_P_NHI0, 0x0000, 0x0000,
  74                   quirk_usb3_maximum_bandwidth },
  75         { 0x8087, PCI_DEVICE_ID_INTEL_MTL_P_NHI1, 0x0000, 0x0000,
  76                   quirk_usb3_maximum_bandwidth },
  77         /*
  78          * CLx is not supported on AMD USB4 Yellow Carp and Pink Sardine platforms.
  79          */
  80         { 0x0438, 0x0208, 0x0000, 0x0000, quirk_clx_disable },
  81         { 0x0438, 0x0209, 0x0000, 0x0000, quirk_clx_disable },
  82         { 0x0438, 0x020a, 0x0000, 0x0000, quirk_clx_disable },
  83         { 0x0438, 0x020b, 0x0000, 0x0000, quirk_clx_disable },
  84 };
  85
  86 /**
  87  * tb_check_quirks() - Check for quirks to apply
  88  * @sw: Thunderbolt switch
  89  *
  90  * Apply any quirks for the Thunderbolt controller.
  91  */
  92 void tb_check_quirks(struct tb_switch *sw)
  93 {
  94         int i;
  95
  96         for (i = 0; i < ARRAY_SIZE(tb_quirks); i++) {
  97                 const struct tb_quirk *q = &tb_quirks[i];
  98
  99                 if (q->hw_vendor_id && q->hw_vendor_id != sw->config.vendor_id)
 100                         continue;
 101                 if (q->hw_device_id && q->hw_device_id != sw->config.device_id)
 102                         continue;
 103                 if (q->vendor && q->vendor != sw->vendor)
 104                         continue;
 105                 if (q->device && q->device != sw->device)
 106                         continue;
 107
 108                 q->hook(sw);
 109         }
 110 }