drivers/soundwire/intel_auxdevice.c

22 #include "bus.h"
77 static int generic_pre_bank_switch(struct sdw_bus *bus)
79 	struct sdw_cdns *cdns = bus_to_cdns(bus);
85 static int generic_post_bank_switch(struct sdw_bus *bus)
87 	struct sdw_cdns *cdns = bus_to_cdns(bus);
93 static void generic_new_peripheral_assigned(struct sdw_bus *bus,
97 	struct sdw_cdns *cdns = bus_to_cdns(bus);
113 		dev_err(bus->dev, "%s: invalid dev_num %d, wake supported %d\n",
122 static int sdw_master_read_intel_prop(struct sdw_bus *bus)
124 	struct sdw_master_prop *prop = &bus->prop;
132 		 "mipi-sdw-link-%d-subproperties", bus->link_id);
134 	link = device_get_named_child_node(bus->dev, name);
136 		dev_err(bus->dev, "Master node %s not found\n", name);
144 	/* the values reported by BIOS are the 2x clock, not the bus clock */
157 	intel_prop = devm_kzalloc(bus->dev, sizeof(*intel_prop), GFP_KERNEL);
179 	bus->vendor_specific_prop = intel_prop;
181 	dev_dbg(bus->dev, "doaise %#x doais %#x dodse %#x dods %#x\n",
190 static int intel_prop_read(struct sdw_bus *bus)
193 	sdw_master_read_prop(bus);
196 	sdw_master_read_intel_prop(bus);
203 static int intel_get_device_num_ida(struct sdw_bus *bus, struct sdw_slave *slave)
212 	bit = find_first_zero_bit(slave->bus->assigned, SDW_MAX_DEVICES);
219 static void intel_put_device_num_ida(struct sdw_bus *bus, struct sdw_slave *slave)
250 	struct sdw_bus *bus;
258 	bus = &cdns->bus;
269 	bus->controller_id = 0;
271 	bus->link_id = auxdev->id;
272 	bus->clk_stop_timeout = 1;
277 	bus->ops = &sdw_intel_ops;
283 	sdw->cdns.bus.compute_params = sdw_compute_params;
288 	ret = sdw_bus_master_add(bus, dev, dev->fwnode);
294 	if (bus->prop.hw_disabled)
297 			 bus->link_id);
302 	bus->prop.err_threshold = 0;
312 	struct sdw_bus *bus = &cdns->bus;
318 	if (bus->prop.hw_disabled) {
325 	link_flags = md_flags >> (bus->link_id * 8);
336 		bus->hw_sync_min_links = 1;
338 	bus->multi_link = multi_link;
364 		pm_runtime_resume(bus->dev);
367 	/* start bus */
370 		dev_err(dev, "bus start failed: %d\n", ret);
402 		pm_runtime_mark_last_busy(bus->dev);
423 	struct sdw_bus *bus = &cdns->bus;
430 	if (!bus->prop.hw_disabled) {
434 	sdw_bus_master_delete(bus);
441 	struct sdw_bus *bus;
444 	bus = &sdw->cdns.bus;
446 	if (bus->prop.hw_disabled || !sdw->startup_done) {
448 			bus->link_id);
459 	 * resume the Master, which will generate a bus reset and result in
484 		dev_dbg(dev, "skipping device, never detected on bus\n");
501 	struct sdw_bus *bus = &cdns->bus;
505 	if (bus->prop.hw_disabled || !sdw->startup_done) {
507 			bus->link_id);
520 		 * The only solution is to resume the entire bus to full power
540 		 * Continue resuming the entire bus (parent + child devices) to exit
548 		ret = device_for_each_child(bus->dev, NULL, intel_resume_child_device);
561 	struct sdw_bus *bus = &cdns->bus;
565 	if (bus->prop.hw_disabled || !sdw->startup_done) {
567 			bus->link_id);
595 		dev_err(dev, "%s: cannot stop bus: %d\n", __func__, ret);
606 	struct sdw_bus *bus = &cdns->bus;
610 	if (bus->prop.hw_disabled || !sdw->startup_done) {
612 			bus->link_id);
621 			dev_err(dev, "%s: cannot stop bus during teardown: %d\n",
628 			dev_err(dev, "%s: cannot stop bus during clock_stop: %d\n",
645 	struct sdw_bus *bus = &cdns->bus;
649 	if (bus->prop.hw_disabled || !sdw->startup_done) {
651 			bus->link_id);
664 		pm_runtime_resume(bus->dev);
666 		link_flags = md_flags >> (bus->link_id * 8);
682 	sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET);
686 		dev_err(dev, "cannot start bus during resume\n");
701 	pm_runtime_mark_last_busy(bus->dev);
711 	struct sdw_bus *bus = &cdns->bus;
715 	if (bus->prop.hw_disabled || !sdw->startup_done) {
717 			bus->link_id);
737 		sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET);
741 			dev_err(dev, "%s: cannot start bus after teardown: %d\n", __func__, ret);
749 			dev_err(dev, "%s: power_up failed after bus reset: %d\n", __func__, ret);
755 			dev_err(dev, "%s: cannot start bus after reset: %d\n", __func__, ret);
771 			dev_err(dev, "%s: cannot start bus after clock stop: %d\n", __func__, ret);