1 // SPDX-License-Identifier: GPL-2.0-only
3  * apple.c - Apple ACPI quirks
19  * acpi_extract_apple_properties - retrieve and convert Apple _DSM properties
25  * of 2-element packages.  Convert to _DSD format and make them available under
38 	props = acpi_evaluate_dsm_typed(adev->handle, &apple_prp_guid, 1, 0,  in acpi_extract_apple_properties()
43 	if (!props->buffer.length)  in acpi_extract_apple_properties()
46 	if (props->buffer.pointer[0] != 3) {  in acpi_extract_apple_properties()
47 		acpi_handle_info(adev->handle, FW_INFO  in acpi_extract_apple_properties()
49 				 props->buffer.length, props->buffer.pointer);  in acpi_extract_apple_properties()
54 	props = acpi_evaluate_dsm_typed(adev->handle, &apple_prp_guid, 1, 1,  in acpi_extract_apple_properties()
59 	numprops = props->package.count / 2;  in acpi_extract_apple_properties()
69 		union acpi_object *key = &props->package.elements[i * 2];  in acpi_extract_apple_properties()
70 		union acpi_object *val = &props->package.elements[i * 2 + 1];  in acpi_extract_apple_properties()
72 		if ( key->type != ACPI_TYPE_STRING ||  in acpi_extract_apple_properties()
73 		    (val->type != ACPI_TYPE_INTEGER &&  in acpi_extract_apple_properties()
74 		     val->type != ACPI_TYPE_BUFFER &&  in acpi_extract_apple_properties()
75 		     val->type != ACPI_TYPE_STRING))  in acpi_extract_apple_properties()
79 		newsize += key->string.length + 1;  in acpi_extract_apple_properties()
80 		if ( val->type == ACPI_TYPE_BUFFER)  in acpi_extract_apple_properties()
81 			newsize += val->buffer.length;  in acpi_extract_apple_properties()
82 		else if (val->type == ACPI_TYPE_STRING)  in acpi_extract_apple_properties()
83 			newsize += val->string.length + 1;  in acpi_extract_apple_properties()
88 		acpi_handle_info(adev->handle, FW_INFO  in acpi_extract_apple_properties()
90 				 numprops - numvalid);  in acpi_extract_apple_properties()
94 	/* newsize += top-level package + 3 objects for each key/value tuple */  in acpi_extract_apple_properties()
95 	newsize	+= (1 + 3 * numvalid) * sizeof(union acpi_object);  in acpi_extract_apple_properties()
100 	/* layout: top-level package | packages | key/value tuples | strings */  in acpi_extract_apple_properties()
101 	newprops->type = ACPI_TYPE_PACKAGE;  in acpi_extract_apple_properties()
102 	newprops->package.count = numvalid;  in acpi_extract_apple_properties()
103 	newprops->package.elements = &newprops[1];  in acpi_extract_apple_properties()
104 	free_space = &newprops[1 + 3 * numvalid];  in acpi_extract_apple_properties()
107 		union acpi_object *key = &props->package.elements[i * 2];  in acpi_extract_apple_properties()
108 		union acpi_object *val = &props->package.elements[i * 2 + 1];  in acpi_extract_apple_properties()
117 		newprops[k].string.length = key->string.length;  in acpi_extract_apple_properties()
119 		memcpy(free_space, key->string.pointer, key->string.length);  in acpi_extract_apple_properties()
120 		free_space += key->string.length + 1;  in acpi_extract_apple_properties()
122 		newprops[v].type = val->type;  in acpi_extract_apple_properties()
123 		if (val->type == ACPI_TYPE_INTEGER) {  in acpi_extract_apple_properties()
124 			newprops[v].integer.value = val->integer.value;  in acpi_extract_apple_properties()
125 		} else if (val->type == ACPI_TYPE_STRING) {  in acpi_extract_apple_properties()
126 			newprops[v].string.length = val->string.length;  in acpi_extract_apple_properties()
128 			memcpy(free_space, val->string.pointer,  in acpi_extract_apple_properties()
129 			       val->string.length);  in acpi_extract_apple_properties()
130 			free_space += val->string.length + 1;  in acpi_extract_apple_properties()
132 			newprops[v].buffer.length = val->buffer.length;  in acpi_extract_apple_properties()
134 			memcpy(free_space, val->buffer.pointer,  in acpi_extract_apple_properties()
135 			       val->buffer.length);  in acpi_extract_apple_properties()
136 			free_space += val->buffer.length;  in acpi_extract_apple_properties()
142 	adev->data.pointer = newprops;  in acpi_extract_apple_properties()
143 	acpi_data_add_props(&adev->data, &apple_prp_guid, newprops);  in acpi_extract_apple_properties()