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// SPDX-License-Identifier: GPL-2.0
/*
* Thunderbolt driver - quirks
*
* Copyright (c) 2020 Mario Limonciello <mario.limonciello@dell.com>
*/
#include "tb.h"
static void quirk_force_power_link(struct tb_switch *sw)
{
sw->quirks |= QUIRK_FORCE_POWER_LINK_CONTROLLER;
}
static void quirk_dp_credit_allocation(struct tb_switch *sw)
{
if (sw->credit_allocation && sw->min_dp_main_credits == 56) {
sw->min_dp_main_credits = 18;
tb_sw_dbg(sw, "quirked DP main: %u\n", sw->min_dp_main_credits);
}
}
static void quirk_clx_disable(struct tb_switch *sw)
{
sw->quirks |= QUIRK_NO_CLX;
tb_sw_dbg(sw, "disabling CL states\n");
}
static void quirk_usb3_maximum_bandwidth(struct tb_switch *sw)
{
struct tb_port *port;
tb_switch_for_each_port(sw, port) {
if (!tb_port_is_usb3_down(port))
continue;
port->max_bw = 16376;
tb_port_dbg(port, "USB3 maximum bandwidth limited to %u Mb/s\n",
port->max_bw);
}
}
struct tb_quirk {
u16 hw_vendor_id;
u16 hw_device_id;
u16 vendor;
u16 device;
void (*hook)(struct tb_switch *sw);
};
static const struct tb_quirk tb_quirks[] = {
/* Dell WD19TB supports self-authentication on unplug */
{ 0x0000, 0x0000, 0x00d4, 0xb070, quirk_force_power_link },
{ 0x0000, 0x0000, 0x00d4, 0xb071, quirk_force_power_link },
/*
* Intel Goshen Ridge NVM 27 and before report wrong number of
* DP buffers.
*/
{ 0x8087, 0x0b26, 0x0000, 0x0000, quirk_dp_credit_allocation },
/*
* Limit the maximum USB3 bandwidth for the following Intel USB4
* host routers due to a hardware issue.
*/
{ 0x8087, PCI_DEVICE_ID_INTEL_ADL_NHI0, 0x0000, 0x0000,
quirk_usb3_maximum_bandwidth },
{ 0x8087, PCI_DEVICE_ID_INTEL_ADL_NHI1, 0x0000, 0x0000,
quirk_usb3_maximum_bandwidth },
{ 0x8087, PCI_DEVICE_ID_INTEL_RPL_NHI0, 0x0000, 0x0000,
quirk_usb3_maximum_bandwidth },
{ 0x8087, PCI_DEVICE_ID_INTEL_RPL_NHI1, 0x0000, 0x0000,
quirk_usb3_maximum_bandwidth },
{ 0x8087, PCI_DEVICE_ID_INTEL_MTL_M_NHI0, 0x0000, 0x0000,
quirk_usb3_maximum_bandwidth },
{ 0x8087, PCI_DEVICE_ID_INTEL_MTL_P_NHI0, 0x0000, 0x0000,
quirk_usb3_maximum_bandwidth },
{ 0x8087, PCI_DEVICE_ID_INTEL_MTL_P_NHI1, 0x0000, 0x0000,
quirk_usb3_maximum_bandwidth },
/*
* CLx is not supported on AMD USB4 Yellow Carp and Pink Sardine platforms.
*/
{ 0x0438, 0x0208, 0x0000, 0x0000, quirk_clx_disable },
{ 0x0438, 0x0209, 0x0000, 0x0000, quirk_clx_disable },
{ 0x0438, 0x020a, 0x0000, 0x0000, quirk_clx_disable },
{ 0x0438, 0x020b, 0x0000, 0x0000, quirk_clx_disable },
};
/**
* tb_check_quirks() - Check for quirks to apply
* @sw: Thunderbolt switch
*
* Apply any quirks for the Thunderbolt controller.
*/
void tb_check_quirks(struct tb_switch *sw)
{
int i;
for (i = 0; i < ARRAY_SIZE(tb_quirks); i++) {
const struct tb_quirk *q = &tb_quirks[i];
if (q->hw_vendor_id && q->hw_vendor_id != sw->config.vendor_id)
continue;
if (q->hw_device_id && q->hw_device_id != sw->config.device_id)
continue;
if (q->vendor && q->vendor != sw->vendor)
continue;
if (q->device && q->device != sw->device)
continue;
q->hook(sw);
}
}
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