xref: /linux/drivers/thunderbolt/quirks.c (revision 79790b6818e96c58fe2bffee1b418c16e64e7b80)
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