1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
2 // Copyright(c) 2015-2023 Intel Corporation
9 #include "bus.h"
14 	struct device *dev = sdw->cdns.dev;  in intel_start_bus()
15 	struct sdw_cdns *cdns = &sdw->cdns;  in intel_start_bus()
16 	struct sdw_bus *bus = &cdns->bus;  in intel_start_bus()  local
21 		dev_err(dev, "%s: unable to soft-reset Cadence IP: %d\n", __func__, ret);  in intel_start_bus()
29 	if (bus->multi_link)  in intel_start_bus()
40 	if (bus->multi_link) {  in intel_start_bus()
62 		dev_err(dev, "%s: unable to exit bus reset sequence: %d\n", __func__, ret);  in intel_start_bus()
69 	schedule_delayed_work(&cdns->attach_dwork,  in intel_start_bus()
77 	struct device *dev = sdw->cdns.dev;  in intel_start_bus_after_reset()
78 	struct sdw_cdns *cdns = &sdw->cdns;  in intel_start_bus_after_reset()
79 	struct sdw_bus *bus = &cdns->bus;  in intel_start_bus_after_reset()  local
87 	 * all the masters are powered on for they are in the same power  in intel_start_bus_after_reset()
89 	 * there is no need to clear slave status and reset bus.  in intel_start_bus_after_reset()
91 	clock_stop0 = sdw_cdns_is_clock_stop(&sdw->cdns);  in intel_start_bus_after_reset()
101 		sdw_clear_slave_status(bus, status);  in intel_start_bus_after_reset()
107 		if (bus->multi_link)  in intel_start_bus_after_reset()
111 		 * Re-initialize the IP since it was powered-off  in intel_start_bus_after_reset()
113 		sdw_cdns_init(&sdw->cdns);  in intel_start_bus_after_reset()
134 		if (bus->multi_link) {  in intel_start_bus_after_reset()
137 				dev_err(sdw->cdns.dev, "sync go failed during resume\n");  in intel_start_bus_after_reset()
156 			dev_err(dev, "unable to exit bus reset sequence during resume\n");  in intel_start_bus_after_reset()
163 	schedule_delayed_work(&cdns->attach_dwork,  in intel_start_bus_after_reset()
171 	struct device *dev = sdw->cdns.dev;  in intel_check_clock_stop()
174 	clock_stop0 = sdw_cdns_is_clock_stop(&sdw->cdns);  in intel_check_clock_stop()
181 	struct device *dev = sdw->cdns.dev;  in intel_start_bus_after_clock_stop()
182 	struct sdw_cdns *cdns = &sdw->cdns;  in intel_start_bus_after_clock_stop()
199 	schedule_delayed_work(&cdns->attach_dwork,  in intel_start_bus_after_clock_stop()
207 	struct device *dev = sdw->cdns.dev;  in intel_stop_bus()
208 	struct sdw_cdns *cdns = &sdw->cdns;  in intel_stop_bus()
212 	cancel_delayed_work_sync(&cdns->attach_dwork);  in intel_stop_bus()
245 	struct sdw_cdns *cdns = &sdw->cdns;  in intel_pre_bank_switch()
246 	struct sdw_bus *bus = &cdns->bus;  in intel_pre_bank_switch()  local
248 	/* Write to register only for multi-link */  in intel_pre_bank_switch()
249 	if (!bus->multi_link)  in intel_pre_bank_switch()
259 	struct sdw_cdns *cdns = &sdw->cdns;  in intel_post_bank_switch()
260 	struct sdw_bus *bus = &cdns->bus;  in intel_post_bank_switch()  local
263 	/* Write to register only for multi-link */  in intel_post_bank_switch()
264 	if (!bus->multi_link)  in intel_post_bank_switch()
267 	mutex_lock(sdw->link_res->shim_lock);  in intel_post_bank_switch()
270 	 * post_bank_switch() ops is called from the bus in loop for  in intel_post_bank_switch()
280 	mutex_unlock(sdw->link_res->shim_lock);  in intel_post_bank_switch()
283 		dev_err(sdw->cdns.dev, "Post bank switch failed: %d\n", ret);  in intel_post_bank_switch()