1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
2 // Copyright(c) 2015-17 Intel Corporation.
8 #include "bus.h"
15 	mutex_destroy(&slave->sdw_dev_lock);  in sdw_slave_release()
25 int sdw_slave_add(struct sdw_bus *bus,  in sdw_slave_add()  argument
34 		return -ENOMEM;  in sdw_slave_add()
37 	memcpy(&slave->id, id, sizeof(*id));  in sdw_slave_add()
38 	slave->dev.parent = bus->dev;  in sdw_slave_add()
39 	slave->dev.fwnode = fwnode;  in sdw_slave_add()
41 	if (id->unique_id == SDW_IGNORED_UNIQUE_ID) {  in sdw_slave_add()
43 		dev_set_name(&slave->dev, "sdw:%01x:%04x:%04x:%02x",  in sdw_slave_add()
44 			     bus->link_id, id->mfg_id, id->part_id,  in sdw_slave_add()
45 			     id->class_id);  in sdw_slave_add()
48 		dev_set_name(&slave->dev, "sdw:%01x:%04x:%04x:%02x:%01x",  in sdw_slave_add()
49 			     bus->link_id, id->mfg_id, id->part_id,  in sdw_slave_add()
50 			     id->class_id, id->unique_id);  in sdw_slave_add()
53 	slave->dev.bus = &sdw_bus_type;  in sdw_slave_add()
54 	slave->dev.of_node = of_node_get(to_of_node(fwnode));  in sdw_slave_add()
55 	slave->dev.type = &sdw_slave_type;  in sdw_slave_add()
56 	slave->dev.groups = sdw_slave_status_attr_groups;  in sdw_slave_add()
57 	slave->bus = bus;  in sdw_slave_add()
58 	slave->status = SDW_SLAVE_UNATTACHED;  in sdw_slave_add()
59 	init_completion(&slave->enumeration_complete);  in sdw_slave_add()
60 	init_completion(&slave->initialization_complete);  in sdw_slave_add()
61 	slave->dev_num = 0;  in sdw_slave_add()
62 	slave->probed = false;  in sdw_slave_add()
63 	slave->first_interrupt_done = false;  in sdw_slave_add()
64 	mutex_init(&slave->sdw_dev_lock);  in sdw_slave_add()
67 		init_completion(&slave->port_ready[i]);  in sdw_slave_add()
69 	mutex_lock(&bus->bus_lock);  in sdw_slave_add()
70 	list_add_tail(&slave->node, &bus->slaves);  in sdw_slave_add()
71 	mutex_unlock(&bus->bus_lock);  in sdw_slave_add()
73 	ret = device_register(&slave->dev);  in sdw_slave_add()
75 		dev_err(bus->dev, "Failed to add slave: ret %d\n", ret);  in sdw_slave_add()
81 		mutex_lock(&bus->bus_lock);  in sdw_slave_add()
82 		list_del(&slave->node);  in sdw_slave_add()
83 		mutex_unlock(&bus->bus_lock);  in sdw_slave_add()
84 		put_device(&slave->dev);  in sdw_slave_add()
96 static bool find_slave(struct sdw_bus *bus,  in find_slave()  argument
100 	u64 addr;  in find_slave()  local
104 	status = acpi_evaluate_integer(adev->handle,  in find_slave()
105 				       METHOD_NAME__ADR, NULL, &addr);  in find_slave()
108 		dev_err(bus->dev, "_ADR resolution failed: %x\n",  in find_slave()
113 	if (bus->ops->override_adr)  in find_slave()
114 		addr = bus->ops->override_adr(bus, addr);  in find_slave()
116 	if (!addr)  in find_slave()
120 	link_id = SDW_DISCO_LINK_ID(addr);  in find_slave()
123 	if (link_id != bus->link_id)  in find_slave()
126 	sdw_extract_slave_id(bus, addr, id);  in find_slave()
132 	struct sdw_bus *bus;  member
141 	struct sdw_bus *bus = cwd->bus;  in sdw_acpi_check_duplicate()  local
144 	if (adev == cwd->adev)  in sdw_acpi_check_duplicate()
147 	if (!find_slave(bus, adev, &id))  in sdw_acpi_check_duplicate()
150 	if (cwd->id.sdw_version != id.sdw_version || cwd->id.mfg_id != id.mfg_id ||  in sdw_acpi_check_duplicate()
151 	    cwd->id.part_id != id.part_id || cwd->id.class_id != id.class_id)  in sdw_acpi_check_duplicate()
154 	if (cwd->id.unique_id != id.unique_id) {  in sdw_acpi_check_duplicate()
155 		dev_dbg(bus->dev,  in sdw_acpi_check_duplicate()
157 			cwd->id.unique_id, id.unique_id, cwd->id.mfg_id,  in sdw_acpi_check_duplicate()
158 			cwd->id.part_id);  in sdw_acpi_check_duplicate()
159 		cwd->ignore_unique_id = false;  in sdw_acpi_check_duplicate()
163 	dev_err(bus->dev,  in sdw_acpi_check_duplicate()
165 		cwd->id.unique_id, id.unique_id, cwd->id.mfg_id, cwd->id.part_id);  in sdw_acpi_check_duplicate()
166 	return -ENODEV;  in sdw_acpi_check_duplicate()
171 	struct sdw_bus *bus = data;  in sdw_acpi_find_one()  local
173 		.bus = bus,  in sdw_acpi_find_one()
179 	if (!find_slave(bus, adev, &cwd.id))  in sdw_acpi_find_one()
182 	/* Brute-force O(N^2) search for duplicates. */  in sdw_acpi_find_one()
183 	ret = acpi_dev_for_each_child(ACPI_COMPANION(bus->dev),  in sdw_acpi_find_one()
192 	sdw_slave_add(bus, &cwd.id, acpi_fwnode_handle(adev));  in sdw_acpi_find_one()
197  * sdw_acpi_find_slaves() - Find Slave devices in Master ACPI node
198  * @bus: SDW bus instance
202 int sdw_acpi_find_slaves(struct sdw_bus *bus)  in sdw_acpi_find_slaves()  argument
206 	parent = ACPI_COMPANION(bus->dev);  in sdw_acpi_find_slaves()
208 		dev_err(bus->dev, "Can't find parent for acpi bind\n");  in sdw_acpi_find_slaves()
209 		return -ENODEV;  in sdw_acpi_find_slaves()
212 	return acpi_dev_for_each_child(parent, sdw_acpi_find_one, bus);  in sdw_acpi_find_slaves()
218  * sdw_of_find_slaves() - Find Slave devices in master device tree node
219  * @bus: SDW bus instance
223 int sdw_of_find_slaves(struct sdw_bus *bus)  in sdw_of_find_slaves()  argument
225 	struct device *dev = bus->dev;  in sdw_of_find_slaves()
228 	for_each_child_of_node(bus->dev->of_node, node) {  in sdw_of_find_slaves()
233 		const __be32 *addr;  in sdw_of_find_slaves()  local
248 		addr = of_get_property(node, "reg", &len);  in sdw_of_find_slaves()
249 		if (!addr || (len < 2 * sizeof(u32))) {  in sdw_of_find_slaves()
254 		link_id = be32_to_cpup(addr++);  in sdw_of_find_slaves()
255 		id.unique_id = be32_to_cpup(addr);  in sdw_of_find_slaves()
259 		if (link_id != bus->link_id)  in sdw_of_find_slaves()
262 		sdw_slave_add(bus, &id, of_fwnode_handle(node));  in sdw_of_find_slaves()