1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * pnpbios -- PnP BIOS driver
5  * This driver provides access to Plug-'n'-Play services provided by
20  * by Adam Belay <ambx1@neo.rr.com>
25  * Adam Belay - <ambx1@neo.rr.com> - March 16, 2003
93 		return -ENOMEM;  in pnp_dock_event()
96 		return -ENOMEM;  in pnp_dock_event()
112 	/* hint that policy agent should enter no-stdout debug mode */  in pnp_dock_event()
115 	/* extensible set of named bus-specific parameters,  in pnp_dock_event()
127 			   info->location_id, info->serial, info->capabilities);  in pnp_dock_event()
142 	int docked = -1, d = 0;  in pnp_dock_thread()
191 	u8 nodenum = dev->number;  in pnpbios_get_resources()
195 		return -EPERM;  in pnpbios_get_resources()
197 	pnp_dbg(&dev->dev, "get resources\n");  in pnpbios_get_resources()
200 		return -1;  in pnpbios_get_resources()
203 		return -ENODEV;  in pnpbios_get_resources()
206 	dev->active = pnp_is_active(dev);  in pnpbios_get_resources()
213 	u8 nodenum = dev->number;  in pnpbios_set_resources()
218 		return -EPERM;  in pnpbios_set_resources()
220 	pnp_dbg(&dev->dev, "set resources\n");  in pnpbios_set_resources()
223 		return -1;  in pnpbios_set_resources()
226 		return -ENODEV;  in pnpbios_set_resources()
230 		return -1;  in pnpbios_set_resources()
232 	ret = pnp_bios_set_dev_node(node->handle, (char)PNPMODE_DYNAMIC, node);  in pnpbios_set_resources()
235 		ret = -1;  in pnpbios_set_resources()
241 	unsigned char *p = (char *)node->data;  in pnpbios_zero_data_stream()
242 	unsigned char *end = (char *)(node->data + node->size);  in pnpbios_zero_data_stream()
248 			len = (p[2] << 8) | p[1];  in pnpbios_zero_data_stream()
267 	u8 nodenum = dev->number;  in pnpbios_disable_resources()
270 	if (dev->flags & PNPBIOS_NO_DISABLE || !pnpbios_is_dynamic(dev))  in pnpbios_disable_resources()
271 		return -EPERM;  in pnpbios_disable_resources()
275 		return -ENOMEM;  in pnpbios_disable_resources()
279 		return -ENODEV;  in pnpbios_disable_resources()
283 	ret = pnp_bios_set_dev_node(dev->number, (char)PNPMODE_DYNAMIC, node);  in pnpbios_disable_resources()
286 		ret = -1;  in pnpbios_disable_resources()
302 	char id[8];  in insert_device()
307 		if (dev->number == node->handle)  in insert_device()
308 			return -EEXIST;  in insert_device()
311 	pnp_eisa_id_to_string(node->eisa_id & PNP_EISA_ID_MASK, id);  in insert_device()
312 	dev = pnp_alloc_dev(&pnpbios_protocol, node->handle, id);  in insert_device()
314 		return -ENOMEM;  in insert_device()
317 	dev->active = pnp_is_active(dev);  in insert_device()
318 	dev->flags = node->flags;  in insert_device()
319 	if (!(dev->flags & PNPBIOS_NO_CONFIG))  in insert_device()
320 		dev->capabilities |= PNP_CONFIGURABLE;  in insert_device()
321 	if (!(dev->flags & PNPBIOS_NO_DISABLE) && pnpbios_is_dynamic(dev))  in insert_device()
322 		dev->capabilities |= PNP_DISABLE;  in insert_device()
323 	dev->capabilities |= PNP_READ;  in insert_device()
325 		dev->capabilities |= PNP_WRITE;  in insert_device()
326 	if (dev->flags & PNPBIOS_REMOVABLE)  in insert_device()
327 		dev->capabilities |= PNP_REMOVABLE;  in insert_device()
330 	if (!dev->active)  in insert_device()
335 		put_device(&dev->dev);  in insert_device()
405 		invert = (strncmp(str, "no-", 3) == 0);  in pnpbios_setup()
421 #define PNP_SIGNATURE   (('$' << 0) + ('P' << 8) + ('n' << 16) + ('P' << 24))
432 	 * Search the defined area (0xf0000-0xffff0) for a valid PnP BIOS  in pnpbios_probe_system()
439 		if (check->fields.signature != PNP_SIGNATURE)  in pnpbios_probe_system()
444 		length = check->fields.length;  in pnpbios_probe_system()
451 			sum += check->chars[i];  in pnpbios_probe_system()
457 		if (check->fields.version < 0x10) {  in pnpbios_probe_system()
460 			       check->fields.version >> 4,  in pnpbios_probe_system()
461 			       check->fields.version & 15);  in pnpbios_probe_system()
466 		       check->fields.version >> 4, check->fields.version & 15,  in pnpbios_probe_system()
467 		       check->fields.pm16cseg, check->fields.pm16offset,  in pnpbios_probe_system()
468 		       check->fields.pm16dseg);  in pnpbios_probe_system()
479 	printk(KERN_WARNING "%s detected. Disabling PnPBIOS\n", d->ident);  in exploding_pnp_bios()
512 		return -ENODEV;  in pnpbios_init()
519 		return -ENODEV;  in pnpbios_init()
525 		return -ENODEV;  in pnpbios_init()