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 struct tb_quirk { 24 u16 hw_vendor_id; 25 u16 hw_device_id; 26 u16 vendor; 27 u16 device; 28 void (*hook)(struct tb_switch *sw); 29 }; 30 31 static const struct tb_quirk tb_quirks[] = { 32 /* Dell WD19TB supports self-authentication on unplug */ 33 { 0x0000, 0x0000, 0x00d4, 0xb070, quirk_force_power_link }, 34 { 0x0000, 0x0000, 0x00d4, 0xb071, quirk_force_power_link }, 35 /* 36 * Intel Goshen Ridge NVM 27 and before report wrong number of 37 * DP buffers. 38 */ 39 { 0x8087, 0x0b26, 0x0000, 0x0000, quirk_dp_credit_allocation }, 40 }; 41 42 /** 43 * tb_check_quirks() - Check for quirks to apply 44 * @sw: Thunderbolt switch 45 * 46 * Apply any quirks for the Thunderbolt controller. 47 */ 48 void tb_check_quirks(struct tb_switch *sw) 49 { 50 int i; 51 52 for (i = 0; i < ARRAY_SIZE(tb_quirks); i++) { 53 const struct tb_quirk *q = &tb_quirks[i]; 54 55 if (q->hw_vendor_id && q->hw_vendor_id != sw->config.vendor_id) 56 continue; 57 if (q->hw_device_id && q->hw_device_id != sw->config.device_id) 58 continue; 59 if (q->vendor && q->vendor != sw->vendor) 60 continue; 61 if (q->device && q->device != sw->device) 62 continue; 63 64 q->hook(sw); 65 } 66 } 67