patch-2.4.22 linux-2.4.22/drivers/acpi/utils.c

• Lines: 414
• Date: 2003-08-25 04:44:41.000000000 -0700
• Orig file: linux-2.4.21/drivers/acpi/utils.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/drivers/acpi/utils.c linux-2.4.22/drivers/acpi/utils.c
@@ -0,0 +1,413 @@
+/*
+ *  acpi_utils.c - ACPI Utility Functions ($Revision: 8 $)
+ *
+ *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
+ *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or (at
+ *  your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+
+
+#define _COMPONENT		ACPI_BUS_COMPONENT
+ACPI_MODULE_NAME		("acpi_utils")
+
+
+/* --------------------------------------------------------------------------
+                            Object Evaluation Helpers
+   -------------------------------------------------------------------------- */
+
+#ifdef ACPI_DEBUG_OUTPUT
+#define acpi_util_eval_error(h,p,s) {\
+	char prefix[80] = {'\0'};\
+	struct acpi_buffer buffer = {sizeof(prefix), prefix};\
+	acpi_get_name(h, ACPI_FULL_PATHNAME, &buffer);\
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluate [%s.%s]: %s\n",\
+		(char *) prefix, p, acpi_format_exception(s))); }
+#else
+#define acpi_util_eval_error(h,p,s)
+#endif
+
+
+acpi_status
+acpi_extract_package (
+	union acpi_object	*package,
+	struct acpi_buffer	*format,
+	struct acpi_buffer	*buffer)
+{
+	u32			size_required = 0;
+	u32			tail_offset = 0;
+	char			*format_string = NULL;
+	u32			format_count = 0;
+	u32			i = 0;
+	u8			*head = NULL;
+	u8			*tail = NULL;
+
+	ACPI_FUNCTION_TRACE("acpi_extract_package");
+
+	if (!package || (package->type != ACPI_TYPE_PACKAGE) || (package->package.count < 1)) {
+		ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Invalid 'package' argument\n"));
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	if (!format || !format->pointer || (format->length < 1)) {
+		ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Invalid 'format' argument\n"));
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	if (!buffer) {
+		ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Invalid 'buffer' argument\n"));
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	format_count = (format->length/sizeof(char)) - 1;
+	if (format_count > package->package.count) {
+		ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Format specifies more objects [%d] than exist in package [%d].", format_count, package->package.count));
+		return_ACPI_STATUS(AE_BAD_DATA);
+	}
+
+	format_string = (char*)format->pointer;
+
+	/*
+	 * Calculate size_required.
+	 */
+	for (i=0; i<format_count; i++) {
+
+		union acpi_object *element = &(package->package.elements[i]);
+
+		if (!element) {
+			return_ACPI_STATUS(AE_BAD_DATA);
+		}
+
+		switch (element->type) {
+
+		case ACPI_TYPE_INTEGER:
+			switch (format_string[i]) {
+			case 'N':
+				size_required += sizeof(acpi_integer);
+				tail_offset += sizeof(acpi_integer);
+				break;
+			case 'S':
+				size_required += sizeof(char*) + sizeof(acpi_integer) + sizeof(char);
+				tail_offset += sizeof(char*);
+				break;
+			default:
+				ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Invalid package element [%d]: got number, expecing [%c].\n", i, format_string[i]));
+				return_ACPI_STATUS(AE_BAD_DATA);
+				break;
+			}
+			break;
+
+		case ACPI_TYPE_STRING:
+		case ACPI_TYPE_BUFFER:
+			switch (format_string[i]) {
+			case 'S':
+				size_required += sizeof(char*) + (element->string.length * sizeof(char)) + sizeof(char);
+				tail_offset += sizeof(char*);
+				break;
+			case 'B':
+				size_required += sizeof(u8*) + (element->buffer.length * sizeof(u8));
+				tail_offset += sizeof(u8*);
+				break;
+			default:
+				ACPI_DEBUG_PRINT((ACPI_DB_WARN, "Invalid package element [%d] got string/buffer, expecing [%c].\n", i, format_string[i]));
+				return_ACPI_STATUS(AE_BAD_DATA);
+				break;
+			}
+			break;
+
+		case ACPI_TYPE_PACKAGE:
+		default:
+			ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unsupported element at index=%d\n", i));
+			/* TBD: handle nested packages... */
+			return_ACPI_STATUS(AE_SUPPORT);
+			break;
+		}
+	}
+
+	/*
+	 * Validate output buffer.
+	 */
+	if (buffer->length < size_required) {
+		buffer->length = size_required;
+		return_ACPI_STATUS(AE_BUFFER_OVERFLOW);
+	}
+	else if (buffer->length != size_required || !buffer->pointer) {
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	head = buffer->pointer;
+	tail = buffer->pointer + tail_offset;
+
+	/*
+	 * Extract package data.
+	 */
+	for (i=0; i<format_count; i++) {
+
+		u8 **pointer = NULL;
+		union acpi_object *element = &(package->package.elements[i]);
+
+		if (!element) {
+			return_ACPI_STATUS(AE_BAD_DATA);
+		}
+
+		switch (element->type) {
+
+		case ACPI_TYPE_INTEGER:
+			switch (format_string[i]) {
+			case 'N':
+				*((acpi_integer*)head) = element->integer.value;
+				head += sizeof(acpi_integer);
+				break;
+			case 'S':
+				pointer = (u8**)head;
+				*pointer = tail;
+				*((acpi_integer*)tail) = element->integer.value;
+				head += sizeof(acpi_integer*);
+				tail += sizeof(acpi_integer);
+				/* NULL terminate string */
+				*tail = (char)0;
+				tail += sizeof(char);
+				break;
+			default:
+				/* Should never get here */
+				break;
+			}
+			break;
+
+		case ACPI_TYPE_STRING:
+		case ACPI_TYPE_BUFFER:
+			switch (format_string[i]) {
+			case 'S':
+				pointer = (u8**)head;
+				*pointer = tail;
+				memcpy(tail, element->string.pointer, element->string.length);
+				head += sizeof(char*);
+				tail += element->string.length * sizeof(char);
+				/* NULL terminate string */
+				*tail = (char)0;
+				tail += sizeof(char);
+				break;
+			case 'B':
+				pointer = (u8**)head;
+				*pointer = tail;
+				memcpy(tail, element->buffer.pointer, element->buffer.length);
+				head += sizeof(u8*);
+				tail += element->buffer.length * sizeof(u8);
+				break;
+			default:
+				/* Should never get here */
+				break;
+			}
+			break;
+
+		case ACPI_TYPE_PACKAGE:
+			/* TBD: handle nested packages... */
+		default:
+			/* Should never get here */
+			break;
+		}
+	}
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+
+acpi_status
+acpi_evaluate_integer (
+	acpi_handle		handle,
+	acpi_string		pathname,
+	struct acpi_object_list	*arguments,
+	unsigned long		*data)
+{
+	acpi_status             status = AE_OK;
+	union acpi_object	element;
+	struct acpi_buffer	buffer = {sizeof(union acpi_object), &element};
+
+	ACPI_FUNCTION_TRACE("acpi_evaluate_integer");
+
+	if (!data)
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+
+	status = acpi_evaluate_object(handle, pathname, arguments, &buffer);
+	if (ACPI_FAILURE(status)) {
+		acpi_util_eval_error(handle, pathname, status);
+		return_ACPI_STATUS(status);
+	}
+
+	if (element.type != ACPI_TYPE_INTEGER) {
+		acpi_util_eval_error(handle, pathname, AE_BAD_DATA);
+		return_ACPI_STATUS(AE_BAD_DATA);
+	}
+
+	*data = element.integer.value;
+
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Return value [%lu]\n", *data));
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+
+#if 0
+acpi_status
+acpi_evaluate_string (
+	acpi_handle		handle,
+	acpi_string		pathname,
+	acpi_object_list	*arguments,
+	acpi_string		*data)
+{
+	acpi_status             status = AE_OK;
+	acpi_object             *element = NULL;
+	acpi_buffer		buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+
+	ACPI_FUNCTION_TRACE("acpi_evaluate_string");
+
+	if (!data)
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+
+	status = acpi_evaluate_object(handle, pathname, arguments, &buffer);
+	if (ACPI_FAILURE(status)) {
+		acpi_util_eval_error(handle, pathname, status);
+		return_ACPI_STATUS(status);
+	}
+
+	element = (acpi_object *) buffer.pointer;
+
+	if ((element->type != ACPI_TYPE_STRING) 
+		|| (element->type != ACPI_TYPE_BUFFER)
+		|| !element->string.length) {
+		acpi_util_eval_error(handle, pathname, AE_BAD_DATA);
+		return_ACPI_STATUS(AE_BAD_DATA);
+	}
+
+	*data = kmalloc(element->string.length + 1, GFP_KERNEL);
+	if (!data) {
+		ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Memory allocation error\n"));
+		return_VALUE(-ENOMEM);
+	}
+	memset(*data, 0, element->string.length + 1);
+
+	memcpy(*data, element->string.pointer, element->string.length);
+
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Return value [%s]\n", *data));
+
+	acpi_os_free(buffer.pointer);
+
+	return_ACPI_STATUS(AE_OK);
+}
+#endif
+
+
+acpi_status
+acpi_evaluate_reference (
+	acpi_handle		handle,
+	acpi_string		pathname,
+	struct acpi_object_list	*arguments,
+	struct acpi_handle_list	*list)
+{
+	acpi_status		status = AE_OK;
+	union acpi_object	*package = NULL;
+	union acpi_object	*element = NULL;
+	struct acpi_buffer	buffer = {ACPI_ALLOCATE_BUFFER, NULL};
+	u32			i = 0;
+
+	ACPI_FUNCTION_TRACE("acpi_evaluate_reference");
+
+	if (!list) {
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	/* Evaluate object. */
+
+	status = acpi_evaluate_object(handle, pathname, arguments, &buffer);
+	if (ACPI_FAILURE(status))
+		goto end;
+
+	package = (union acpi_object *) buffer.pointer;
+
+	if ((buffer.length == 0) || !package) {
+		ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 
+			"No return object (len %X ptr %p)\n", 
+			buffer.length, package));
+		status = AE_BAD_DATA;
+		acpi_util_eval_error(handle, pathname, status);
+		goto end;
+	}
+	if (package->type != ACPI_TYPE_PACKAGE) {
+		ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 
+			"Expecting a [Package], found type %X\n", 
+			package->type));
+		status = AE_BAD_DATA;
+		acpi_util_eval_error(handle, pathname, status);
+		goto end;
+	}
+	if (!package->package.count) {
+		ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 
+			"[Package] has zero elements (%p)\n", 
+			package));
+		status = AE_BAD_DATA;
+		acpi_util_eval_error(handle, pathname, status);
+		goto end;
+	}
+
+	if (package->package.count > ACPI_MAX_HANDLES) {
+		return AE_NO_MEMORY;
+	}
+	list->count = package->package.count;
+
+	/* Extract package data. */
+
+	for (i = 0; i < list->count; i++) {
+
+		element = &(package->package.elements[i]);
+
+		if (element->type != ACPI_TYPE_ANY) {
+			status = AE_BAD_DATA;
+			ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 
+				"Expecting a [Reference] package element, found type %X\n",
+				element->type));
+			acpi_util_eval_error(handle, pathname, status);
+			break;
+		}
+
+		/* Get the  acpi_handle. */
+
+		list->handles[i] = element->reference.handle;
+		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found reference [%p]\n",
+			list->handles[i]));
+	}
+
+end:
+	if (ACPI_FAILURE(status)) {
+		list->count = 0;
+		//kfree(list->handles);
+	}
+
+	acpi_os_free(buffer.pointer);
+
+	return_ACPI_STATUS(status);
+}
+
+