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
quirk_force_power_link(struct tb_switch * sw)10 static void quirk_force_power_link(struct tb_switch *sw)
11 {
12 sw->quirks |= QUIRK_FORCE_POWER_LINK_CONTROLLER;
13 tb_sw_dbg(sw, "forcing power to link controller\n");
14 }
15
quirk_dp_credit_allocation(struct tb_switch * sw)16 static void quirk_dp_credit_allocation(struct tb_switch *sw)
17 {
18 if (sw->credit_allocation && sw->min_dp_main_credits == 56) {
19 sw->min_dp_main_credits = 18;
20 tb_sw_dbg(sw, "quirked DP main: %u\n", sw->min_dp_main_credits);
21 }
22 }
23
quirk_clx_disable(struct tb_switch * sw)24 static void quirk_clx_disable(struct tb_switch *sw)
25 {
26 sw->quirks |= QUIRK_NO_CLX;
27 tb_sw_dbg(sw, "disabling CL states\n");
28 }
29
quirk_usb3_maximum_bandwidth(struct tb_switch * sw)30 static void quirk_usb3_maximum_bandwidth(struct tb_switch *sw)
31 {
32 struct tb_port *port;
33
34 if (tb_switch_is_icm(sw))
35 return;
36
37 tb_switch_for_each_port(sw, port) {
38 if (!tb_port_is_usb3_down(port))
39 continue;
40 port->max_bw = 16376;
41 tb_port_dbg(port, "USB3 maximum bandwidth limited to %u Mb/s\n",
42 port->max_bw);
43 }
44 }
45
quirk_block_rpm_in_redrive(struct tb_switch * sw)46 static void quirk_block_rpm_in_redrive(struct tb_switch *sw)
47 {
48 sw->quirks |= QUIRK_KEEP_POWER_IN_DP_REDRIVE;
49 tb_sw_dbg(sw, "preventing runtime PM in DP redrive mode\n");
50 }
51
52 struct tb_quirk {
53 u16 hw_vendor_id;
54 u16 hw_device_id;
55 u16 vendor;
56 u16 device;
57 void (*hook)(struct tb_switch *sw);
58 };
59
60 static const struct tb_quirk tb_quirks[] = {
61 /* Dell WD19TB supports self-authentication on unplug */
62 { 0x0000, 0x0000, 0x00d4, 0xb070, quirk_force_power_link },
63 { 0x0000, 0x0000, 0x00d4, 0xb071, quirk_force_power_link },
64 /*
65 * Intel Goshen Ridge NVM 27 and before report wrong number of
66 * DP buffers.
67 */
68 { 0x8087, 0x0b26, 0x0000, 0x0000, quirk_dp_credit_allocation },
69 /*
70 * Limit the maximum USB3 bandwidth for the following Intel USB4
71 * host routers due to a hardware issue.
72 */
73 { 0x8087, PCI_DEVICE_ID_INTEL_ADL_NHI0, 0x0000, 0x0000,
74 quirk_usb3_maximum_bandwidth },
75 { 0x8087, PCI_DEVICE_ID_INTEL_ADL_NHI1, 0x0000, 0x0000,
76 quirk_usb3_maximum_bandwidth },
77 { 0x8087, PCI_DEVICE_ID_INTEL_RPL_NHI0, 0x0000, 0x0000,
78 quirk_usb3_maximum_bandwidth },
79 { 0x8087, PCI_DEVICE_ID_INTEL_RPL_NHI1, 0x0000, 0x0000,
80 quirk_usb3_maximum_bandwidth },
81 { 0x8087, PCI_DEVICE_ID_INTEL_MTL_M_NHI0, 0x0000, 0x0000,
82 quirk_usb3_maximum_bandwidth },
83 { 0x8087, PCI_DEVICE_ID_INTEL_MTL_P_NHI0, 0x0000, 0x0000,
84 quirk_usb3_maximum_bandwidth },
85 { 0x8087, PCI_DEVICE_ID_INTEL_MTL_P_NHI1, 0x0000, 0x0000,
86 quirk_usb3_maximum_bandwidth },
87 { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_80G_NHI, 0x0000, 0x0000,
88 quirk_usb3_maximum_bandwidth },
89 { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_40G_NHI, 0x0000, 0x0000,
90 quirk_usb3_maximum_bandwidth },
91 { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HUB_80G_BRIDGE, 0x0000, 0x0000,
92 quirk_usb3_maximum_bandwidth },
93 { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HUB_40G_BRIDGE, 0x0000, 0x0000,
94 quirk_usb3_maximum_bandwidth },
95 /*
96 * Block Runtime PM in DP redrive mode for Intel Barlow Ridge host
97 * controllers.
98 */
99 { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_80G_NHI, 0x0000, 0x0000,
100 quirk_block_rpm_in_redrive },
101 { 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_40G_NHI, 0x0000, 0x0000,
102 quirk_block_rpm_in_redrive },
103 /*
104 * CLx is not supported on AMD USB4 Yellow Carp and Pink Sardine platforms.
105 */
106 { 0x0438, 0x0208, 0x0000, 0x0000, quirk_clx_disable },
107 { 0x0438, 0x0209, 0x0000, 0x0000, quirk_clx_disable },
108 { 0x0438, 0x020a, 0x0000, 0x0000, quirk_clx_disable },
109 { 0x0438, 0x020b, 0x0000, 0x0000, quirk_clx_disable },
110 };
111
112 /**
113 * tb_check_quirks() - Check for quirks to apply
114 * @sw: Thunderbolt switch
115 *
116 * Apply any quirks for the Thunderbolt controller.
117 */
tb_check_quirks(struct tb_switch * sw)118 void tb_check_quirks(struct tb_switch *sw)
119 {
120 int i;
121
122 for (i = 0; i < ARRAY_SIZE(tb_quirks); i++) {
123 const struct tb_quirk *q = &tb_quirks[i];
124
125 if (q->hw_vendor_id && q->hw_vendor_id != sw->config.vendor_id)
126 continue;
127 if (q->hw_device_id && q->hw_device_id != sw->config.device_id)
128 continue;
129 if (q->vendor && q->vendor != sw->vendor)
130 continue;
131 if (q->device && q->device != sw->device)
132 continue;
133
134 tb_sw_dbg(sw, "running %ps\n", q->hook);
135 q->hook(sw);
136 }
137 }
138