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thunderbolt: Announce USB4 v2 connection manager support

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Program the CMUV (Connection Manager USB4 Version) field for USB4 v2 and
v1 routers according to the spec.

Signed-off-by: Gil Fine <gil.fine@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Gil Fine 2022-09-29 13:17:24 +03:00 committed by Mika Westerberg
parent 0fc7088656
commit 14200a2631
2 changed files with 9 additions and 2 deletions
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8
drivers/thunderbolt/switch.c
View file

@ -2430,9 +2430,13 @@ int tb_switch_configure(struct tb_switch *sw)
/*
* For USB4 devices, we need to program the CM version
* accordingly so that it knows to expose all the
* additional capabilities.
* additional capabilities. Program it according to USB4
* version to avoid changing existing (v1) routers behaviour.
*/
sw->config.cmuv = USB4_VERSION_1_0;
if (usb4_switch_version(sw) < 2)
sw->config.cmuv = ROUTER_CS_4_CMUV_V1;
else
sw->config.cmuv = ROUTER_CS_4_CMUV_V2;
sw->config.plug_events_delay = 0xa;
/* Enumerate the switch */

3
drivers/thunderbolt/tb_regs.h
View file

@ -195,6 +195,9 @@ struct tb_regs_switch_header {
#define ROUTER_CS_1 0x01
#define ROUTER_CS_4 0x04
/* Used with the router cmuv field */
#define ROUTER_CS_4_CMUV_V1 0x10
#define ROUTER_CS_4_CMUV_V2 0x20
#define ROUTER_CS_5 0x05
#define ROUTER_CS_5_SLP BIT(0)
#define ROUTER_CS_5_WOP BIT(1)