1 // SPDX-License-Identifier: GPL-2.0
3  * driver.c - device id matching, driver model, etc.
29 int compare_pnp_id(struct pnp_id *pos, const char *id)  in compare_pnp_id()  argument
31 	if (!pos || !id || (strlen(id) != 7))  in compare_pnp_id()
33 	if (memcmp(id, "ANYDEVS", 7) == 0)  in compare_pnp_id()
36 		if (memcmp(pos->id, id, 3) == 0)  in compare_pnp_id()
37 			if (compare_func(pos->id, id) == 1)  in compare_pnp_id()
39 		pos = pos->next;  in compare_pnp_id()
44 static const struct pnp_device_id *match_device(const struct pnp_driver *drv,  in match_device()  argument
47 	const struct pnp_device_id *drv_id = drv->id_table;  in match_device()
52 	while (*drv_id->id) {  in match_device()
53 		if (compare_pnp_id(dev->id, drv_id->id))  in match_device()
63 	if (pnp_dev->status != PNP_READY) {  in pnp_device_attach()
65 		return -EBUSY;  in pnp_device_attach()
67 	pnp_dev->status = PNP_ATTACHED;  in pnp_device_attach()
76 	if (pnp_dev->status == PNP_ATTACHED)  in pnp_device_detach()
77 		pnp_dev->status = PNP_READY;  in pnp_device_detach()
89 	pnp_drv = to_pnp_driver(dev->driver);  in pnp_device_probe()
95 	if (pnp_dev->active == 0) {  in pnp_device_probe()
96 		if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)) {  in pnp_device_probe()
101 	} else if ((pnp_drv->flags & PNP_DRIVER_RES_DISABLE)  in pnp_device_probe()
108 	if (pnp_drv->probe) {  in pnp_device_probe()
111 			error = pnp_drv->probe(pnp_dev, dev_id);  in pnp_device_probe()
114 		pnp_dev->driver = pnp_drv;  in pnp_device_probe()
129 	struct pnp_driver *drv = pnp_dev->driver;  in pnp_device_remove()  local
131 	if (drv) {  in pnp_device_remove()
132 		if (drv->remove)  in pnp_device_remove()
133 			drv->remove(pnp_dev);  in pnp_device_remove()
134 		pnp_dev->driver = NULL;  in pnp_device_remove()
137 	if (pnp_dev->active &&  in pnp_device_remove()
138 	    (!drv || !(drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)))  in pnp_device_remove()
147 	struct pnp_driver *drv = pnp_dev->driver;  in pnp_device_shutdown()  local
149 	if (drv && drv->shutdown)  in pnp_device_shutdown()
150 		drv->shutdown(pnp_dev);  in pnp_device_shutdown()
153 static int pnp_bus_match(struct device *dev, const struct device_driver *drv)  in pnp_bus_match()  argument
156 	const struct pnp_driver *pnp_drv = to_pnp_driver(drv);  in pnp_bus_match()
166 	struct pnp_driver *pnp_drv = pnp_dev->driver;  in __pnp_bus_suspend()
172 	if (pnp_drv->driver.pm && pnp_drv->driver.pm->suspend) {  in __pnp_bus_suspend()
173 		error = pnp_drv->driver.pm->suspend(dev);  in __pnp_bus_suspend()
174 		suspend_report_result(dev, pnp_drv->driver.pm->suspend, error);  in __pnp_bus_suspend()
179 	if (pnp_drv->suspend) {  in __pnp_bus_suspend()
180 		error = pnp_drv->suspend(pnp_dev, state);  in __pnp_bus_suspend()
185 	/* can_write is necessary to be able to re-start the device on resume */  in __pnp_bus_suspend()
193 		pnp_dev->protocol->suspend(pnp_dev, state);  in __pnp_bus_suspend()
215 	struct pnp_driver *pnp_drv = pnp_dev->driver;  in pnp_bus_resume()
221 	if (pnp_dev->protocol->resume) {  in pnp_bus_resume()
222 		error = pnp_dev->protocol->resume(pnp_dev);  in pnp_bus_resume()
233 	if (pnp_drv->driver.pm && pnp_drv->driver.pm->resume) {  in pnp_bus_resume()
234 		error = pnp_drv->driver.pm->resume(dev);  in pnp_bus_resume()
239 	if (pnp_drv->resume) {  in pnp_bus_resume()
240 		error = pnp_drv->resume(pnp_dev);  in pnp_bus_resume()
271 	return dev->bus == &pnp_bus_type;  in dev_is_pnp()
275 int pnp_register_driver(struct pnp_driver *drv)  in pnp_register_driver()  argument
277 	drv->driver.name = drv->name;  in pnp_register_driver()
278 	drv->driver.bus = &pnp_bus_type;  in pnp_register_driver()
280 	return driver_register(&drv->driver);  in pnp_register_driver()
284 void pnp_unregister_driver(struct pnp_driver *drv)  in pnp_unregister_driver()  argument
286 	driver_unregister(&drv->driver);  in pnp_unregister_driver()
291  * pnp_add_id - adds an EISA id to the specified device
293  * @id: pointer to an EISA id string
295 struct pnp_id *pnp_add_id(struct pnp_dev *dev, const char *id)  in pnp_add_id()  argument
303 	dev_id->id[0] = id[0];  in pnp_add_id()
304 	dev_id->id[1] = id[1];  in pnp_add_id()
305 	dev_id->id[2] = id[2];  in pnp_add_id()
306 	dev_id->id[3] = tolower(id[3]);  in pnp_add_id()
307 	dev_id->id[4] = tolower(id[4]);  in pnp_add_id()
308 	dev_id->id[5] = tolower(id[5]);  in pnp_add_id()
309 	dev_id->id[6] = tolower(id[6]);  in pnp_add_id()
310 	dev_id->id[7] = '\0';  in pnp_add_id()
312 	dev_id->next = NULL;  in pnp_add_id()
313 	ptr = dev->id;  in pnp_add_id()
314 	while (ptr && ptr->next)  in pnp_add_id()
315 		ptr = ptr->next;  in pnp_add_id()
317 		ptr->next = dev_id;  in pnp_add_id()
319 		dev->id = dev_id;  in pnp_add_id()