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()
52 	u32 ctrl, lane;  in tb_lc_set_port_configured()  local
55 	if (sw->generation < 2)  in tb_lc_set_port_configured()
62 	ret = tb_sw_read(sw, &ctrl, TB_CFG_SWITCH, cap + TB_LC_SX_CTRL, 1);  in tb_lc_set_port_configured()
66 	/* Resolve correct lane */  in tb_lc_set_port_configured()
67 	if (port->port % 2)  in tb_lc_set_port_configured()
68 		lane = TB_LC_SX_CTRL_L1C;  in tb_lc_set_port_configured()
70 		lane = TB_LC_SX_CTRL_L2C;  in tb_lc_set_port_configured()
73 		ctrl |= lane;  in tb_lc_set_port_configured()
77 		ctrl &= ~lane;  in tb_lc_set_port_configured()
82 	return tb_sw_write(sw, &ctrl, TB_CFG_SWITCH, cap + TB_LC_SX_CTRL, 1);  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()
110 	u32 ctrl, lane;  in tb_lc_set_xdomain_configured()  local
113 	if (sw->generation < 2)  in tb_lc_set_xdomain_configured()
120 	ret = tb_sw_read(sw, &ctrl, TB_CFG_SWITCH, cap + TB_LC_SX_CTRL, 1);  in tb_lc_set_xdomain_configured()
124 	/* Resolve correct lane */  in tb_lc_set_xdomain_configured()
125 	if (port->port % 2)  in tb_lc_set_xdomain_configured()
126 		lane = TB_LC_SX_CTRL_L1D;  in tb_lc_set_xdomain_configured()
128 		lane = TB_LC_SX_CTRL_L2D;  in tb_lc_set_xdomain_configured()
131 		ctrl |= lane;  in tb_lc_set_xdomain_configured()
133 		ctrl &= ~lane;  in tb_lc_set_xdomain_configured()
135 	return tb_sw_write(sw, &ctrl, TB_CFG_SWITCH, cap + TB_LC_SX_CTRL, 1);  in tb_lc_set_xdomain_configured()
139  * tb_lc_configure_xdomain() - Inform LC that the link is XDomain
142  * Sets the lane configured for XDomain accordingly so that the LC knows
151  * tb_lc_unconfigure_xdomain() - Unconfigure XDomain from port
154  * Unsets the lane XDomain configuration.
162  * tb_lc_start_lane_initialization() - Start lane initialization
163  * @port: Device router lane 0 adapter
165  * Starts lane initialization for @port after the router resumed from
166  * sleep. Should be called for those downstream lane adapters that were
173 	struct tb_switch *sw = port->sw;  in tb_lc_start_lane_initialization()
180 	if (sw->generation < 2)  in tb_lc_start_lane_initialization()
187 	ret = tb_sw_read(sw, &ctrl, TB_CFG_SWITCH, cap + TB_LC_SX_CTRL, 1);  in tb_lc_start_lane_initialization()
193 	return tb_sw_write(sw, &ctrl, TB_CFG_SWITCH, cap + TB_LC_SX_CTRL, 1);  in tb_lc_start_lane_initialization()
197  * tb_lc_is_clx_supported() - Check whether CLx is supported by the lane adapter
198  * @port: Lane adapter
205 	struct tb_switch *sw = port->sw;  in tb_lc_is_clx_supported()
213 	ret = tb_sw_read(sw, &val, TB_CFG_SWITCH, cap + TB_LC_LINK_ATTR, 1);  in tb_lc_is_clx_supported()
221  * tb_lc_is_usb_plugged() - Is there USB device connected to port
222  * @port: Device router lane 0 adapter
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()
239 	ret = tb_sw_read(sw, &val, TB_CFG_SWITCH, cap + TB_LC_CS_42, 1);  in tb_lc_is_usb_plugged()
247  * tb_lc_is_xhci_connected() - Is the internal xHCI connected
248  * @port: Device router lane 0 adapter
254 	struct tb_switch *sw = port->sw;  in tb_lc_is_xhci_connected()
258 	if (sw->generation != 3)  in tb_lc_is_xhci_connected()
265 	ret = tb_sw_read(sw, &val, TB_CFG_SWITCH, cap + TB_LC_LINK_REQ, 1);  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()
285 	ret = tb_sw_read(sw, &val, TB_CFG_SWITCH, cap + TB_LC_LINK_REQ, 1);  in __tb_lc_xhci_connect()
294 	return tb_sw_write(sw, &val, TB_CFG_SWITCH, cap + TB_LC_LINK_REQ, 1);  in __tb_lc_xhci_connect()
298  * tb_lc_xhci_connect() - Connect internal xHCI
299  * @port: Device router lane 0 adapter
318  * tb_lc_xhci_disconnect() - Disconnect internal xHCI
319  * @port: Device router lane 0 adapter
341 			 offset + TB_LC_SX_CTRL, 1);  in tb_lc_set_wake_one()
357 	return tb_sw_write(sw, &ctrl, TB_CFG_SWITCH, offset + TB_LC_SX_CTRL, 1);  in tb_lc_set_wake_one()
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()
429 				 offset + TB_LC_SX_CTRL, 1);  in tb_lc_set_sleep()
435 				  offset + TB_LC_SX_CTRL, 1);  in tb_lc_set_sleep()
444  * tb_lc_lane_bonding_possible() - Is lane bonding possible towards switch
447  * Checks whether conditions for lane bonding from parent to @sw are
456 	if (sw->generation < 2)  in tb_lc_lane_bonding_possible()
464 	ret = tb_sw_read(sw, &val, TB_CFG_SWITCH, cap + TB_LC_PORT_ATTR, 1);  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()
491 			 sw->cap_lc + TB_LC_SNK_ALLOCATION, 1);  in tb_lc_dp_sink_available()
497 	 * either 0 or 1.  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
529 	if (sw->generation < 3)  in tb_lc_dp_sink_query()
540  * tb_lc_dp_sink_alloc() - Allocate DP sink
546  * other cases returs negative errno. In particular %-EBUSY is returned if
554 	if (sw->generation < 3)  in tb_lc_dp_sink_alloc()
566 			 sw->cap_lc + TB_LC_SNK_ALLOCATION, 1);  in tb_lc_dp_sink_alloc()
580 			  sw->cap_lc + TB_LC_SNK_ALLOCATION, 1);  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.
601 	if (sw->generation < 3)  in tb_lc_dp_sink_dealloc()
614 			 sw->cap_lc + TB_LC_SNK_ALLOCATION, 1);  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
643 	return tb_sw_write(sw, &in, TB_CFG_SWITCH, TB_LC_POWER, 1);  in tb_lc_force_power()