1 // SPDX-License-Identifier: GPL-2.0
14  * tb_lc_read_uuid() - Read switch UUID from link controller common register
20 	if (!sw->cap_lc)  in tb_lc_read_uuid()
21 		return -EINVAL;  in tb_lc_read_uuid()
22 	return tb_sw_read(sw, uuid, TB_CFG_SWITCH, sw->cap_lc + TB_LC_FUSE, 4);  in tb_lc_read_uuid()
27 	if (!sw->cap_lc)  in read_lc_desc()
28 		return -EINVAL;  in read_lc_desc()
29 	return tb_sw_read(sw, desc, TB_CFG_SWITCH, sw->cap_lc + TB_LC_DESC, 1);  in read_lc_desc()
34 	struct tb_switch *sw = port->sw;  in find_port_lc_cap()
45 	phys = tb_phy_port_from_link(port->port);  in find_port_lc_cap()
47 	return sw->cap_lc + start + phys * size;  in find_port_lc_cap()
51  * tb_lc_reset_port() - Trigger downstream port reset through LC
56  * non-USB4 routers with link controller (that's Thunderbolt 2 and
61 	struct tb_switch *sw = port->sw;  in tb_lc_reset_port()
65 	if (sw->generation < 2)  in tb_lc_reset_port()
66 		return -EINVAL;  in tb_lc_reset_port()
96 	struct tb_switch *sw = port->sw;  in tb_lc_set_port_configured()
97 	u32 ctrl, lane;  in tb_lc_set_port_configured()  local
100 	if (sw->generation < 2)  in tb_lc_set_port_configured()
111 	/* Resolve correct lane */  in tb_lc_set_port_configured()
112 	if (port->port % 2)  in tb_lc_set_port_configured()
113 		lane = TB_LC_SX_CTRL_L1C;  in tb_lc_set_port_configured()
115 		lane = TB_LC_SX_CTRL_L2C;  in tb_lc_set_port_configured()
118 		ctrl |= lane;  in tb_lc_set_port_configured()
122 		ctrl &= ~lane;  in tb_lc_set_port_configured()
131  * tb_lc_configure_port() - Let LC know about configured port
142  * tb_lc_unconfigure_port() - Let LC know about unconfigured port
154 	struct tb_switch *sw = port->sw;  in tb_lc_set_xdomain_configured()
155 	u32 ctrl, lane;  in tb_lc_set_xdomain_configured()  local
158 	if (sw->generation < 2)  in tb_lc_set_xdomain_configured()
169 	/* Resolve correct lane */  in tb_lc_set_xdomain_configured()
170 	if (port->port % 2)  in tb_lc_set_xdomain_configured()
171 		lane = TB_LC_SX_CTRL_L1D;  in tb_lc_set_xdomain_configured()
173 		lane = TB_LC_SX_CTRL_L2D;  in tb_lc_set_xdomain_configured()
176 		ctrl |= lane;  in tb_lc_set_xdomain_configured()
178 		ctrl &= ~lane;  in tb_lc_set_xdomain_configured()
184  * tb_lc_configure_xdomain() - Inform LC that the link is XDomain
187  * Sets the lane configured for XDomain accordingly so that the LC knows
196  * tb_lc_unconfigure_xdomain() - Unconfigure XDomain from port
199  * Unsets the lane XDomain configuration.
207  * tb_lc_start_lane_initialization() - Start lane initialization
208  * @port: Device router lane 0 adapter
210  * Starts lane initialization for @port after the router resumed from
211  * sleep. Should be called for those downstream lane adapters that were
218 	struct tb_switch *sw = port->sw;  in tb_lc_start_lane_initialization()
225 	if (sw->generation < 2)  in tb_lc_start_lane_initialization()
242  * tb_lc_is_clx_supported() - Check whether CLx is supported by the lane adapter
243  * @port: Lane adapter
250 	struct tb_switch *sw = port->sw;  in tb_lc_is_clx_supported()
266  * tb_lc_is_usb_plugged() - Is there USB device connected to port
267  * @port: Device router lane 0 adapter
269  * Returns true if the @port has USB type-C device connected.
273 	struct tb_switch *sw = port->sw;  in tb_lc_is_usb_plugged()
277 	if (sw->generation != 3)  in tb_lc_is_usb_plugged()
292  * tb_lc_is_xhci_connected() - Is the internal xHCI connected
293  * @port: Device router lane 0 adapter
299 	struct tb_switch *sw = port->sw;  in tb_lc_is_xhci_connected()
303 	if (sw->generation != 3)  in tb_lc_is_xhci_connected()
319 	struct tb_switch *sw = port->sw;  in __tb_lc_xhci_connect()
323 	if (sw->generation != 3)  in __tb_lc_xhci_connect()
324 		return -EINVAL;  in __tb_lc_xhci_connect()
343  * tb_lc_xhci_connect() - Connect internal xHCI
344  * @port: Device router lane 0 adapter
363  * tb_lc_xhci_disconnect() - Disconnect internal xHCI
364  * @port: Device router lane 0 adapter
406  * tb_lc_set_wake() - Enable/disable wake
417 	if (sw->generation < 2)  in tb_lc_set_wake()
434 		unsigned int offset = sw->cap_lc + start + i * size;  in tb_lc_set_wake()
445  * tb_lc_set_sleep() - Inform LC that the switch is going to sleep
456 	if (sw->generation < 2)  in tb_lc_set_sleep()
470 		unsigned int offset = sw->cap_lc + start + i * size;  in tb_lc_set_sleep()
489  * tb_lc_lane_bonding_possible() - Is lane bonding possible towards switch
492  * Checks whether conditions for lane bonding from parent to @sw are
501 	if (sw->generation < 2)  in tb_lc_lane_bonding_possible()
527 	return -EINVAL;  in tb_lc_dp_sink_from_port()
536 			 sw->cap_lc + TB_LC_SNK_ALLOCATION, 1);  in tb_lc_dp_sink_available()
555 	return -EBUSY;  in tb_lc_dp_sink_available()
559  * tb_lc_dp_sink_query() - Is DP sink available for DP IN port
574 	if (sw->generation < 3)  in tb_lc_dp_sink_query()
585  * tb_lc_dp_sink_alloc() - Allocate DP sink
591  * other cases returs negative errno. In particular %-EBUSY is returned if
599 	if (sw->generation < 3)  in tb_lc_dp_sink_alloc()
611 			 sw->cap_lc + TB_LC_SNK_ALLOCATION, 1);  in tb_lc_dp_sink_alloc()
625 			  sw->cap_lc + TB_LC_SNK_ALLOCATION, 1);  in tb_lc_dp_sink_alloc()
635  * tb_lc_dp_sink_dealloc() - De-allocate DP sink
636  * @sw: Switch whose DP sink is de-allocated
637  * @in: DP IN port whose DP sink is de-allocated
639  * De-allocate DP sink from @in using LC SNK_ALLOCATION registers.
646 	if (sw->generation < 3)  in tb_lc_dp_sink_dealloc()
659 			 sw->cap_lc + TB_LC_SNK_ALLOCATION, 1);  in tb_lc_dp_sink_dealloc()
669 			  sw->cap_lc + TB_LC_SNK_ALLOCATION, 1);  in tb_lc_dp_sink_dealloc()
673 	tb_port_dbg(in, "sink %d de-allocated\n", sink);  in tb_lc_dp_sink_dealloc()
678  * tb_lc_force_power() - Forces LC to be powered on