1 // SPDX-License-Identifier: GPL-2.0-only
3  * MEN Chameleon Bus.
21 		while (ids->device) {  in mcb_match_id()
22 			if (ids->device == dev->id)  in mcb_match_id()
37 	found_id = mcb_match_id(mdrv->id_table, mdev);  in mcb_match()
49 	ret = add_uevent_var(env, "MODALIAS=mcb:16z%03d", mdev->id);  in mcb_uevent()
51 		return -ENOMEM;  in mcb_uevent()
58 	struct mcb_driver *mdrv = to_mcb_driver(dev->driver);  in mcb_probe()
64 	found_id = mcb_match_id(mdrv->id_table, mdev);  in mcb_probe()
66 		return -ENODEV;  in mcb_probe()
68 	carrier_mod = mdev->dev.parent->driver->owner;  in mcb_probe()
70 		return -EINVAL;  in mcb_probe()
73 	ret = mdrv->probe(mdev, found_id);  in mcb_probe()
84 	struct mcb_driver *mdrv = to_mcb_driver(dev->driver);  in mcb_remove()
88 	mdrv->remove(mdev);  in mcb_remove()
90 	carrier_mod = mdev->dev.parent->driver->owner;  in mcb_remove()
93 	put_device(&mdev->dev);  in mcb_remove()
98 	struct mcb_driver *mdrv = to_mcb_driver(dev->driver);  in mcb_shutdown()
101 	if (mdrv && mdrv->shutdown)  in mcb_shutdown()
102 		mdrv->shutdown(mdev);  in mcb_shutdown()
108 	struct mcb_bus *bus = to_mcb_bus(dev);  in revision_show()  local
110 	return scnprintf(buf, PAGE_SIZE, "%d\n", bus->revision);  in revision_show()
117 	struct mcb_bus *bus = to_mcb_bus(dev);  in model_show()  local
119 	return scnprintf(buf, PAGE_SIZE, "%c\n", bus->model);  in model_show()
126 	struct mcb_bus *bus = to_mcb_bus(dev);  in minor_show()  local
128 	return scnprintf(buf, PAGE_SIZE, "%d\n", bus->minor);  in minor_show()
135 	struct mcb_bus *bus = to_mcb_bus(dev);  in name_show()  local
137 	return scnprintf(buf, PAGE_SIZE, "%s\n", bus->name);  in name_show()
169 	.name = "mcb-carrier",
174  * __mcb_register_driver() - Register a @mcb_driver at the system
179  * Register a @mcb_driver at the system. Perform some sanity checks, if
185 	if (!drv->probe || !drv->remove)  in __mcb_register_driver()
186 		return -EINVAL;  in __mcb_register_driver()
188 	drv->driver.owner = owner;  in __mcb_register_driver()
189 	drv->driver.bus = &mcb_bus_type;  in __mcb_register_driver()
190 	drv->driver.mod_name = mod_name;  in __mcb_register_driver()
192 	return driver_register(&drv->driver);  in __mcb_register_driver()
197  * mcb_unregister_driver() - Unregister a @mcb_driver from the system
200  * Unregister a @mcb_driver from the system.
204 	driver_unregister(&drv->driver);  in mcb_unregister_driver()
212 	mcb_bus_put(mdev->bus);  in mcb_release_dev()
217  * mcb_device_register() - Register a mcb_device
218  * @bus: The @mcb_bus of the device
221  * Register a specific @mcb_device at a @mcb_bus and the system itself.
223 int mcb_device_register(struct mcb_bus *bus, struct mcb_device *dev)  in mcb_device_register()  argument
228 	device_initialize(&dev->dev);  in mcb_device_register()
229 	mcb_bus_get(bus);  in mcb_device_register()
230 	dev->dev.bus = &mcb_bus_type;  in mcb_device_register()
231 	dev->dev.parent = bus->dev.parent;  in mcb_device_register()
232 	dev->dev.release = mcb_release_dev;  in mcb_device_register()
233 	dev->dma_dev = bus->carrier;  in mcb_device_register()
235 	device_id = dev->id;  in mcb_device_register()
236 	dev_set_name(&dev->dev, "mcb%d-16z%03d-%d:%d:%d",  in mcb_device_register()
237 		bus->bus_nr, device_id, dev->inst, dev->group, dev->var);  in mcb_device_register()
239 	ret = device_add(&dev->dev);  in mcb_device_register()
241 		pr_err("Failed registering device 16z%03d on bus mcb%d (%d)\n",  in mcb_device_register()
242 			device_id, bus->bus_nr, ret);  in mcb_device_register()
249 	put_device(&dev->dev);  in mcb_device_register()
257 	struct mcb_bus *bus = to_mcb_bus(dev);  in mcb_free_bus()  local
259 	put_device(bus->carrier);  in mcb_free_bus()
260 	ida_free(&mcb_ida, bus->bus_nr);  in mcb_free_bus()
261 	kfree(bus);  in mcb_free_bus()
265  * mcb_alloc_bus() - Allocate a new @mcb_bus
272 	struct mcb_bus *bus;  in mcb_alloc_bus()  local
276 	bus = kzalloc(sizeof(struct mcb_bus), GFP_KERNEL);  in mcb_alloc_bus()
277 	if (!bus)  in mcb_alloc_bus()
278 		return ERR_PTR(-ENOMEM);  in mcb_alloc_bus()
282 		kfree(bus);  in mcb_alloc_bus()
286 	bus->bus_nr = bus_nr;  in mcb_alloc_bus()
287 	bus->carrier = get_device(carrier);  in mcb_alloc_bus()
289 	device_initialize(&bus->dev);  in mcb_alloc_bus()
290 	bus->dev.parent = carrier;  in mcb_alloc_bus()
291 	bus->dev.bus = &mcb_bus_type;  in mcb_alloc_bus()
292 	bus->dev.type = &mcb_carrier_device_type;  in mcb_alloc_bus()
293 	bus->dev.release = mcb_free_bus;  in mcb_alloc_bus()
295 	dev_set_name(&bus->dev, "mcb:%d", bus_nr);  in mcb_alloc_bus()
296 	rc = device_add(&bus->dev);  in mcb_alloc_bus()
300 	return bus;  in mcb_alloc_bus()
303 	put_device(&bus->dev);  in mcb_alloc_bus()
314 static void mcb_devices_unregister(struct mcb_bus *bus)  in mcb_devices_unregister()  argument
316 	bus_for_each_dev(bus->dev.bus, NULL, NULL, __mcb_devices_unregister);  in mcb_devices_unregister()
319  * mcb_release_bus() - Free a @mcb_bus
320  * @bus: The @mcb_bus to release
322  * Release an allocated @mcb_bus from the system.
324 void mcb_release_bus(struct mcb_bus *bus)  in mcb_release_bus()  argument
326 	mcb_devices_unregister(bus);  in mcb_release_bus()
331  * mcb_bus_get() - Increment refcnt
332  * @bus: The @mcb_bus
336 struct mcb_bus *mcb_bus_get(struct mcb_bus *bus)  in mcb_bus_get()  argument
338 	if (bus)  in mcb_bus_get()
339 		get_device(&bus->dev);  in mcb_bus_get()
341 	return bus;  in mcb_bus_get()
346  * mcb_bus_put() - Decrement refcnt
347  * @bus: The @mcb_bus
351 void mcb_bus_put(struct mcb_bus *bus)  in mcb_bus_put()  argument
353 	if (bus)  in mcb_bus_put()
354 		put_device(&bus->dev);  in mcb_bus_put()
359  * mcb_alloc_dev() - Allocate a device
360  * @bus: The @mcb_bus the device is part of
362  * Allocate a @mcb_device and add bus.
364 struct mcb_device *mcb_alloc_dev(struct mcb_bus *bus)  in mcb_alloc_dev()  argument
372 	dev->bus = bus;  in mcb_alloc_dev()
379  * mcb_free_dev() - Free @mcb_device
404  * mcb_bus_add_devices() - Add devices in the bus' internal device list
405  * @bus: The @mcb_bus we add the devices
407  * Add devices in the bus' internal device list to the system.
409 void mcb_bus_add_devices(const struct mcb_bus *bus)  in mcb_bus_add_devices()  argument
411 	bus_for_each_dev(bus->dev.bus, NULL, NULL, __mcb_bus_add_devices);  in mcb_bus_add_devices()
416  * mcb_get_resource() - get a resource for a mcb device
423 		return &dev->mem;  in mcb_get_resource()
425 		return &dev->irq;  in mcb_get_resource()
432  * mcb_request_mem() - Request memory
445 		name = dev->dev.driver->name;  in mcb_request_mem()
447 	size = resource_size(&dev->mem);  in mcb_request_mem()
449 	mem = request_mem_region(dev->mem.start, size, name);  in mcb_request_mem()
451 		return ERR_PTR(-EBUSY);  in mcb_request_mem()
458  * mcb_release_mem() - Release memory requested by device
468 	release_mem_region(mem->start, size);  in mcb_release_mem()
478 	return irq->start;  in __mcb_get_irq()
482  * mcb_get_irq() - Get device's IRQ number
489 	struct mcb_bus *bus = dev->bus;  in mcb_get_irq()  local
491 	if (bus->get_irq)  in mcb_get_irq()
492 		return bus->get_irq(dev);  in mcb_get_irq()
516 MODULE_DESCRIPTION("MEN Chameleon Bus Driver");