1 // SPDX-License-Identifier: GPL-2.0-only
21  * * -EIO if there is an issue in acpi_object passed.
25 	if (!obj || obj->type != ACPI_TYPE_INTEGER)  in get_int_value()
26 		return -EIO;  in get_int_value()
27 	*out = (int)obj->integer.value;  in get_int_value()
32  * update_sar_data: sar data is updated based on regulatory mode
36  * context->reg_value will never exceed MAX_REGULATORY
41 		&context->config_data[context->reg_value];  in update_sar_data()
43 	if (config->device_mode_info &&  in update_sar_data()
44 	    context->sar_data.device_mode < config->total_dev_mode) {  in update_sar_data()
47 		for (itr = 0; itr < config->total_dev_mode; itr++) {  in update_sar_data()
48 			if (context->sar_data.device_mode ==  in update_sar_data()
49 				config->device_mode_info[itr].device_mode) {  in update_sar_data()
51 				&config->device_mode_info[itr];  in update_sar_data()
53 				context->sar_data.antennatable_index = dev_mode->antennatable_index;  in update_sar_data()
54 				context->sar_data.bandtable_index = dev_mode->bandtable_index;  in update_sar_data()
55 				context->sar_data.sartable_index = dev_mode->sartable_index;  in update_sar_data()
63  * parse_package: parse acpi package for retrieving SAR information
67  * Given acpi_object is iterated to retrieve information for each device mode.
68  * If a given package corresponding to a specific device mode is faulty, it is
71  * statements in the for loop on encountering error in parsing given device mode.
83 	num = &item->package.elements[0];  in parse_package()
89 	data = &context->config_data[reg];  in parse_package()
90 	if (data->total_dev_mode > MAX_DEV_MODES ||	data->total_dev_mode == 0 ||  in parse_package()
91 	    item->package.count <= data->total_dev_mode)  in parse_package()
94 	data->device_mode_info = kmalloc_array(data->total_dev_mode,  in parse_package()
96 	if (!data->device_mode_info)  in parse_package()
99 	for (itr = 0; itr < data->total_dev_mode; itr++) {  in parse_package()
102 		num = &item->package.elements[itr + 1];  in parse_package()
103 		if (num->type != ACPI_TYPE_PACKAGE || num->package.count < TOTAL_DATA)  in parse_package()
105 		if (get_int_value(&num->package.elements[0], &temp.device_mode))  in parse_package()
107 		if (get_int_value(&num->package.elements[1], &temp.bandtable_index))  in parse_package()
109 		if (get_int_value(&num->package.elements[2], &temp.antennatable_index))  in parse_package()
111 		if (get_int_value(&num->package.elements[3], &temp.sartable_index))  in parse_package()
113 		data->device_mode_info[itr] = temp;  in parse_package()
122  * Retrieve the current device mode information from the BIOS.
130 	struct wwan_sar_context *context = dev_get_drvdata(&device->dev);  in sar_get_device_mode()
135 	out = acpi_evaluate_dsm_typed(context->handle, &context->guid, rev,  in sar_get_device_mode()
138 		dev_err(&device->dev, "DSM cmd:%d Failed to retrieve value\n", COMMAND_ID_DEV_MODE);  in sar_get_device_mode()
142 	context->sar_data.device_mode = out->integer.value;  in sar_get_device_mode()
144 	sysfs_notify(&device->dev.kobj, NULL, SYSFS_DATANAME);  in sar_get_device_mode()
161 	return sysfs_emit(buf, "%d %d %d %d\n", context->sar_data.device_mode,  in intc_data_show()
162 		      context->sar_data.bandtable_index,  in intc_data_show()
163 		      context->sar_data.antennatable_index,  in intc_data_show()
164 		      context->sar_data.sartable_index);  in intc_data_show()
172 	return sysfs_emit(buf, "%d\n", context->reg_value);  in intc_reg_show()
183 		return -EINVAL;  in intc_reg_store()
188 		return -EOVERFLOW;  in intc_reg_store()
189 	context->reg_value = value;  in intc_reg_store()
191 	sysfs_notify(&dev->kobj, NULL, SYSFS_DATANAME);  in intc_reg_store()
212 			dev_err(&device->dev, "sar_get_device_mode error");  in sar_notify()
223 	out = acpi_evaluate_dsm_typed(context->handle, &context->guid, rev,  in sar_get_data()
227 	if (out->package.count >= 3 &&  in sar_get_data()
228 	    out->package.elements[0].type == ACPI_TYPE_INTEGER &&  in sar_get_data()
229 	    out->package.elements[1].type == ACPI_TYPE_INTEGER &&  in sar_get_data()
230 	    out->package.elements[2].type == ACPI_TYPE_PACKAGE &&  in sar_get_data()
231 	    out->package.elements[2].package.count > 0) {  in sar_get_data()
232 		context->config_data[reg].version = out->package.elements[0].integer.value;  in sar_get_data()
233 		context->config_data[reg].total_dev_mode =  in sar_get_data()
234 			out->package.elements[1].integer.value;  in sar_get_data()
235 		if (context->config_data[reg].total_dev_mode <= 0 ||  in sar_get_data()
236 		    context->config_data[reg].total_dev_mode > MAX_DEV_MODES) {  in sar_get_data()
240 		parse_package(context, &out->package.elements[2]);  in sar_get_data()
253 		return -ENOMEM;  in sar_probe()
255 	context->sar_device = device;  in sar_probe()
256 	context->handle = ACPI_HANDLE(&device->dev);  in sar_probe()
257 	dev_set_drvdata(&device->dev, context);  in sar_probe()
259 	result = guid_parse(SAR_DSM_UUID, &context->guid);  in sar_probe()
261 		dev_err(&device->dev, "SAR UUID parse error: %d\n", result);  in sar_probe()
269 		dev_err(&device->dev, "Failed to get device mode\n");  in sar_probe()
270 		result = -EIO;  in sar_probe()
274 	result = sysfs_create_group(&device->dev.kobj, &intcsar_group);  in sar_probe()
276 		dev_err(&device->dev, "sysfs creation failed\n");  in sar_probe()
280 	if (acpi_install_notify_handler(ACPI_HANDLE(&device->dev), ACPI_DEVICE_NOTIFY,  in sar_probe()
282 		dev_err(&device->dev, "Failed acpi_install_notify_handler\n");  in sar_probe()
283 		result = -EIO;  in sar_probe()
289 	sysfs_remove_group(&device->dev.kobj, &intcsar_group);  in sar_probe()
297 	struct wwan_sar_context *context = dev_get_drvdata(&device->dev);  in sar_remove()
300 	acpi_remove_notify_handler(ACPI_HANDLE(&device->dev),  in sar_remove()
302 	sysfs_remove_group(&device->dev.kobj, &intcsar_group);  in sar_remove()
304 		kfree(context->config_data[reg].device_mode_info);  in sar_remove()