1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (C) 2020 - 2023, Intel Corporation
16 MODULE_PARM_DESC(clx, "allow low power states on the high-speed lanes (default: true)");
44 			   port->cap_phy + LANE_ADP_CS_1, 1);  in tb_port_pm_secondary_set()
54 			     port->cap_phy + LANE_ADP_CS_1, 1);  in tb_port_pm_secondary_set()
73 	/* Don't enable CLx in case of two single-lane links */  in tb_port_clx_supported()
74 	if (!port->bonded && port->dual_link_port)  in tb_port_clx_supported()
77 	/* Don't enable CLx in case of inter-domain link */  in tb_port_clx_supported()
78 	if (port->xdomain)  in tb_port_clx_supported()
81 	if (tb_switch_is_usb4(port->sw)) {  in tb_port_clx_supported()
96 			   port->cap_phy + LANE_ADP_CS_0, 1);  in tb_port_clx_supported()
116 		return -EOPNOTSUPP;  in tb_port_clx_set()
119 			   port->cap_phy + LANE_ADP_CS_1, 1);  in tb_port_clx_set()
129 			     port->cap_phy + LANE_ADP_CS_1, 1);  in tb_port_clx_set()
151 			   port->cap_phy + LANE_ADP_CS_1, 1);  in tb_port_clx()
166  * tb_port_clx_is_enabled() - Is given CL state enabled
178  * tb_switch_clx_is_supported() - Is CLx supported on this type of router
186 	if (sw->quirks & QUIRK_NO_CLX)  in tb_switch_clx_is_supported()
200  * tb_switch_clx_init() - Initialize router CL states
233 	sw->clx = clx;  in tb_switch_clx_init()
256 	int up_port = sw->config.upstream_port_number;  in tb_switch_mask_clx_objections()
260 	/* Only Titan Ridge of pre-USB4 devices support CLx states */  in tb_switch_mask_clx_objections()
268 	 * In Titan Ridge there are only 2 dual-lane Thunderbolt ports:  in tb_switch_mask_clx_objections()
269 	 * Port A consists of lane adapters 1,2 and  in tb_switch_mask_clx_objections()
270 	 * Port B consists of lane adapters 3,4  in tb_switch_mask_clx_objections()
272 	 * port B (lanes 3,4) and unmask objections from Port A and vice-versa.  in tb_switch_mask_clx_objections()
285 			 sw->cap_lp + offset, ARRAY_SIZE(val));  in tb_switch_mask_clx_objections()
295 			   sw->cap_lp + offset, ARRAY_SIZE(val));  in tb_switch_mask_clx_objections()
307  * tb_switch_clx_enable() - Enable CLx on upstream port of specified router
312  * of the link are not configured as two single lane links and only if the link
313  * is not inter-domain link. The complete set of conditions is described in CM
325 	if (!clx || sw->clx == clx)  in tb_switch_clx_enable()
329 		return -EINVAL;  in tb_switch_clx_enable()
343 		return -EOPNOTSUPP;  in tb_switch_clx_enable()
361 		return -EOPNOTSUPP;  in tb_switch_clx_enable()
380 	sw->clx |= clx;  in tb_switch_clx_enable()
387  * tb_switch_clx_disable() - Disable CLx on upstream port of specified router
398 	unsigned int clx = sw->clx;  in tb_switch_clx_disable()
408 	if (sw->is_unplugged)  in tb_switch_clx_disable()
422 	sw->clx = 0;  in tb_switch_clx_disable()