1 // SPDX-License-Identifier: GPL-2.0
12  * tb_lc_read_uuid() - Read switch UUID from link controller common register
18 	if (!sw->cap_lc)  in tb_lc_read_uuid()
19 		return -EINVAL;  in tb_lc_read_uuid()
20 	return tb_sw_read(sw, uuid, TB_CFG_SWITCH, sw->cap_lc + TB_LC_FUSE, 4);  in tb_lc_read_uuid()
25 	if (!sw->cap_lc)  in read_lc_desc()
26 		return -EINVAL;  in read_lc_desc()
27 	return tb_sw_read(sw, desc, TB_CFG_SWITCH, sw->cap_lc + TB_LC_DESC, 1);  in read_lc_desc()
32 	struct tb_switch *sw = port->sw;  in find_port_lc_cap()
43 	phys = tb_phy_port_from_link(port->port);  in find_port_lc_cap()
45 	return sw->cap_lc + start + phys * size;  in find_port_lc_cap()
51 	struct tb_switch *sw = port->sw;  in tb_lc_set_port_configured()
55 	if (sw->generation < 2)  in tb_lc_set_port_configured()
67 	if (port->port % 2)  in tb_lc_set_port_configured()
86  * tb_lc_configure_port() - Let LC know about configured port
97  * tb_lc_unconfigure_port() - Let LC know about unconfigured port
109 	struct tb_switch *sw = port->sw;  in tb_lc_set_xdomain_configured()
113 	if (sw->generation < 2)  in tb_lc_set_xdomain_configured()
125 	if (port->port % 2)  in tb_lc_set_xdomain_configured()
139  * tb_lc_configure_xdomain() - Inform LC that the link is XDomain
151  * tb_lc_unconfigure_xdomain() - Unconfigure XDomain from port
162  * tb_lc_start_lane_initialization() - Start lane initialization
173 	struct tb_switch *sw = port->sw;  in tb_lc_start_lane_initialization()
180 	if (sw->generation < 2)  in tb_lc_start_lane_initialization()
197  * tb_lc_is_clx_supported() - Check whether CLx is supported by the lane adapter
205 	struct tb_switch *sw = port->sw;  in tb_lc_is_clx_supported()
221  * tb_lc_is_usb_plugged() - Is there USB device connected to port
224  * Returns true if the @port has USB type-C device connected.
228 	struct tb_switch *sw = port->sw;  in tb_lc_is_usb_plugged()
232 	if (sw->generation != 3)  in tb_lc_is_usb_plugged()
247  * tb_lc_is_xhci_connected() - Is the internal xHCI connected
254 	struct tb_switch *sw = port->sw;  in tb_lc_is_xhci_connected()
258 	if (sw->generation != 3)  in tb_lc_is_xhci_connected()
274 	struct tb_switch *sw = port->sw;  in __tb_lc_xhci_connect()
278 	if (sw->generation != 3)  in __tb_lc_xhci_connect()
279 		return -EINVAL;  in __tb_lc_xhci_connect()
298  * tb_lc_xhci_connect() - Connect internal xHCI
303  * routers only.
318  * tb_lc_xhci_disconnect() - Disconnect internal xHCI
322  * for Thunderbolt 3 routers only.
361  * tb_lc_set_wake() - Enable/disable wake
372 	if (sw->generation < 2)  in tb_lc_set_wake()
389 		unsigned int offset = sw->cap_lc + start + i * size;  in tb_lc_set_wake()
400  * tb_lc_set_sleep() - Inform LC that the switch is going to sleep
411 	if (sw->generation < 2)  in tb_lc_set_sleep()
425 		unsigned int offset = sw->cap_lc + start + i * size;  in tb_lc_set_sleep()
444  * tb_lc_lane_bonding_possible() - Is lane bonding possible towards switch
456 	if (sw->generation < 2)  in tb_lc_lane_bonding_possible()
476 	/* The first DP IN port is sink 0 and second is sink 1 */  in tb_lc_dp_sink_from_port()
482 	return -EINVAL;  in tb_lc_dp_sink_from_port()
485 static int tb_lc_dp_sink_available(struct tb_switch *sw, int sink)  in tb_lc_dp_sink_available()  argument
491 			 sw->cap_lc + TB_LC_SNK_ALLOCATION, 1);  in tb_lc_dp_sink_available()
496 	 * Sink is available for CM/SW to use if the allocation valie is  in tb_lc_dp_sink_available()
499 	if (!sink) {  in tb_lc_dp_sink_available()
510 	return -EBUSY;  in tb_lc_dp_sink_available()
514  * tb_lc_dp_sink_query() - Is DP sink available for DP IN port
515  * @sw: Switch whose DP sink is queried
518  * Queries through LC SNK_ALLOCATION registers whether DP sink is available
523 	int sink;  in tb_lc_dp_sink_query()  local
526 	 * For older generations sink is always available as there is no  in tb_lc_dp_sink_query()
529 	if (sw->generation < 3)  in tb_lc_dp_sink_query()
532 	sink = tb_lc_dp_sink_from_port(sw, in);  in tb_lc_dp_sink_query()
533 	if (sink < 0)  in tb_lc_dp_sink_query()
536 	return !tb_lc_dp_sink_available(sw, sink);  in tb_lc_dp_sink_query()
540  * tb_lc_dp_sink_alloc() - Allocate DP sink
541  * @sw: Switch whose DP sink is allocated
542  * @in: DP IN port the DP sink is allocated for
544  * Allocate DP sink for @in via LC SNK_ALLOCATION registers. If the
546  * other cases returs negative errno. In particular %-EBUSY is returned if
551 	int ret, sink;  in tb_lc_dp_sink_alloc()  local
554 	if (sw->generation < 3)  in tb_lc_dp_sink_alloc()
557 	sink = tb_lc_dp_sink_from_port(sw, in);  in tb_lc_dp_sink_alloc()
558 	if (sink < 0)  in tb_lc_dp_sink_alloc()
559 		return sink;  in tb_lc_dp_sink_alloc()
561 	ret = tb_lc_dp_sink_available(sw, sink);  in tb_lc_dp_sink_alloc()
566 			 sw->cap_lc + TB_LC_SNK_ALLOCATION, 1);  in tb_lc_dp_sink_alloc()
570 	if (!sink) {  in tb_lc_dp_sink_alloc()
580 			  sw->cap_lc + TB_LC_SNK_ALLOCATION, 1);  in tb_lc_dp_sink_alloc()
585 	tb_port_dbg(in, "sink %d allocated\n", sink);  in tb_lc_dp_sink_alloc()
590  * tb_lc_dp_sink_dealloc() - De-allocate DP sink
591  * @sw: Switch whose DP sink is de-allocated
592  * @in: DP IN port whose DP sink is de-allocated
594  * De-allocate DP sink from @in using LC SNK_ALLOCATION registers.
598 	int ret, sink;  in tb_lc_dp_sink_dealloc()  local
601 	if (sw->generation < 3)  in tb_lc_dp_sink_dealloc()
604 	sink = tb_lc_dp_sink_from_port(sw, in);  in tb_lc_dp_sink_dealloc()
605 	if (sink < 0)  in tb_lc_dp_sink_dealloc()
606 		return sink;  in tb_lc_dp_sink_dealloc()
609 	ret = tb_lc_dp_sink_available(sw, sink);  in tb_lc_dp_sink_dealloc()
614 			 sw->cap_lc + TB_LC_SNK_ALLOCATION, 1);  in tb_lc_dp_sink_dealloc()
618 	if (!sink)  in tb_lc_dp_sink_dealloc()
624 			  sw->cap_lc + TB_LC_SNK_ALLOCATION, 1);  in tb_lc_dp_sink_dealloc()
628 	tb_port_dbg(in, "sink %d de-allocated\n", sink);  in tb_lc_dp_sink_dealloc()
633  * tb_lc_force_power() - Forces LC to be powered on