1 // SPDX-License-Identifier: GPL-2.0-only
10  *  Copyright (C) 2005-2014 Dell Inc.
23 #include "dell-smbios.h"
77 	{0x0000, 19, -1}, /* diagnostics */
78 	/* handled by kernel: dell-laptop */
87 	u16 max;  member
123 	/* handled by kernel: dell-laptop */
139 	case -1: /* Completed with error */  in dell_smbios_error()
140 		return -EIO;  in dell_smbios_error()
141 	case -2: /* Function not supported */  in dell_smbios_error()
142 		return -ENXIO;  in dell_smbios_error()
144 		return -EINVAL;  in dell_smbios_error()
155 		return -ENOMEM;  in dell_smbios_register_device()
157 	priv->device = d;  in dell_smbios_register_device()
158 	priv->priority = priority;  in dell_smbios_register_device()
159 	priv->call_fn = call_fn;  in dell_smbios_register_device()
161 	list_add_tail(&priv->list, &smbios_device_list);  in dell_smbios_register_device()
163 	dev_dbg(d, "Added device: %s\n", d->driver->name);  in dell_smbios_register_device()
174 		if (priv->device == d) {  in dell_smbios_unregister_device()
175 			list_del(&priv->list);  in dell_smbios_unregister_device()
181 	dev_dbg(d, "Remove device: %s\n", d->driver->name);  in dell_smbios_unregister_device()
192 	if (buffer->cmd_class > 30) {  in dell_smbios_call_filter()
193 		dev_dbg(d, "class too big: %u\n", buffer->cmd_class);  in dell_smbios_call_filter()
194 		return -EINVAL;  in dell_smbios_call_filter()
198 	if (!(da_supported_commands & (1 << buffer->cmd_class))) {  in dell_smbios_call_filter()
201 		return -EINVAL;  in dell_smbios_call_filter()
206 		if (buffer->cmd_class != call_blacklist[i].cmd_class)  in dell_smbios_call_filter()
208 		if (buffer->cmd_select != call_blacklist[i].cmd_select &&  in dell_smbios_call_filter()
209 		    call_blacklist[i].cmd_select != -1)  in dell_smbios_call_filter()
212 			buffer->cmd_class, buffer->cmd_select);  in dell_smbios_call_filter()
213 		return -EINVAL;  in dell_smbios_call_filter()
218 	if ((buffer->cmd_class == CLASS_TOKEN_READ ||  in dell_smbios_call_filter()
219 	     buffer->cmd_class == CLASS_TOKEN_WRITE) &&  in dell_smbios_call_filter()
220 	     buffer->cmd_select < 3) {  in dell_smbios_call_filter()
224 			return -EINVAL;  in dell_smbios_call_filter()
229 			if (da_tokens[i].location != buffer->input[0])  in dell_smbios_call_filter()
238 				buffer->input[0]);  in dell_smbios_call_filter()
239 			return -EINVAL;  in dell_smbios_call_filter()
244 			if (!token_blacklist[i].min || !token_blacklist[i].max)  in dell_smbios_call_filter()
247 			    t <= token_blacklist[i].max)  in dell_smbios_call_filter()
248 				return -EINVAL;  in dell_smbios_call_filter()
253 			if (!token_whitelist[i].min || !token_whitelist[i].max)  in dell_smbios_call_filter()
256 			    t > token_whitelist[i].max)  in dell_smbios_call_filter()
268 		if (buffer->cmd_class != call_whitelist[i].cmd_class)  in dell_smbios_call_filter()
270 		if (buffer->cmd_select != call_whitelist[i].cmd_select)  in dell_smbios_call_filter()
275 			buffer->cmd_class, buffer->cmd_select);  in dell_smbios_call_filter()
280 			buffer->cmd_class, buffer->cmd_select);  in dell_smbios_call_filter()
287 			buffer->cmd_class, buffer->cmd_select);  in dell_smbios_call_filter()
291 	return -EACCES;  in dell_smbios_call_filter()
303 		if (!selected || priv->priority >= selected->priority) {  in dell_smbios_call()
304 			dev_dbg(priv->device, "Trying device ID: %d\n", priv->priority);  in dell_smbios_call()
310 		ret = -ENODEV;  in dell_smbios_call()
311 		pr_err("No dell-smbios drivers are loaded\n");  in dell_smbios_call()
315 	ret = selected->call_fn(buffer);  in dell_smbios_call()
327 	buffer->input[0] = arg0;  in dell_fill_request()
328 	buffer->input[1] = arg1;  in dell_fill_request()
329 	buffer->input[2] = arg2;  in dell_fill_request()
330 	buffer->input[3] = arg3;  in dell_fill_request()
339 	buffer->cmd_class = class;  in dell_send_request()
340 	buffer->cmd_select = select;  in dell_send_request()
344 	return dell_smbios_error(buffer->output[0]);  in dell_send_request()
396 	int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1;  in parse_da_table()
406 	if (dm->length < 17)  in parse_da_table()
409 	da_supported_commands = table->supportedCmds;  in parse_da_table()
419 	memcpy(da_tokens+da_num_tokens, table->tokens,  in parse_da_table()
448 	switch (dm->type) {  in find_tokens()
460 			     struct device_attribute *attr, char *buf)  in location_show()  argument
462 	struct token_sysfs_data *data = container_of(attr, struct token_sysfs_data, location_attr);  in location_show()
465 		return -EPERM;  in location_show()
467 	return sysfs_emit(buf, "%08x", data->token->location);  in location_show()
471 			  struct device_attribute *attr, char *buf)  in value_show()  argument
473 	struct token_sysfs_data *data = container_of(attr, struct token_sysfs_data, value_attr);  in value_show()
476 		return -EPERM;  in value_show()
478 	return sysfs_emit(buf, "%08x", data->token->value);  in value_show()
482 	.name = "tokens"
487 		.name = "dell-smbios",
500 		return -ENOMEM;  in build_tokens_sysfs()
520 		sysfs_attr_init(&token_entries[i].location_attr.attr);  in build_tokens_sysfs()
521 		token_entries[i].location_attr.attr.name = location_name;  in build_tokens_sysfs()
522 		token_entries[i].location_attr.attr.mode = 0444;  in build_tokens_sysfs()
524 		token_attrs[j++] = &token_entries[i].location_attr.attr;  in build_tokens_sysfs()
534 		sysfs_attr_init(&token_entries[i].value_attr.attr);  in build_tokens_sysfs()
535 		token_entries[i].value_attr.attr.name = value_name;  in build_tokens_sysfs()
536 		token_entries[i].value_attr.attr.mode = 0444;  in build_tokens_sysfs()
538 		token_attrs[j++] = &token_entries[i].value_attr.attr;  in build_tokens_sysfs()
542 	ret = sysfs_create_group(&dev->dev.kobj, &smbios_attribute_group);  in build_tokens_sysfs()
548 	while (i--) {  in build_tokens_sysfs()
549 		kfree(token_entries[i].location_attr.attr.name);  in build_tokens_sysfs()
550 		kfree(token_entries[i].value_attr.attr.name);  in build_tokens_sysfs()
556 	return -ENOMEM;  in build_tokens_sysfs()
563 	sysfs_remove_group(&pdev->dev.kobj,  in free_group()
566 		kfree(token_entries[i].location_attr.attr.name);  in free_group()
567 		kfree(token_entries[i].value_attr.attr.name);  in free_group()
580 		pr_err("Unable to run on non-Dell system\n");  in dell_smbios_init()
581 		return -ENODEV;  in dell_smbios_init()
590 	platform_device = platform_device_alloc("dell-smbios", 0);  in dell_smbios_init()
592 		ret = -ENOMEM;  in dell_smbios_init()
609 		ret = -ENODEV;  in dell_smbios_init()
615 		zero_duplicates(&platform_device->dev);  in dell_smbios_init()