[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / acpi / resources / rsirq.c

/*******************************************************************************
 *
 * Module Name: rsirq - IRQ resource descriptors
 *
 ******************************************************************************/

/*
 * Copyright (C) 2000 - 2005, R. Byron Moore
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#include <acpi/acpi.h>
#include <acpi/acresrc.h>

#define _COMPONENT          ACPI_RESOURCES
ACPI_MODULE_NAME("rsirq")

/*******************************************************************************
 *
 * FUNCTION:    acpi_rs_irq_resource
 *
 * PARAMETERS:  byte_stream_buffer      - Pointer to the resource input byte
 *                                        stream
 *              bytes_consumed          - Pointer to where the number of bytes
 *                                        consumed the byte_stream_buffer is
 *                                        returned
 *              output_buffer           - Pointer to the return data buffer
 *              structure_size          - Pointer to where the number of bytes
 *                                        in the return data struct is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Take the resource byte stream and fill out the appropriate
 *              structure pointed to by the output_buffer. Return the
 *              number of bytes consumed from the byte stream.
 *
 ******************************************************************************/
acpi_status
acpi_rs_irq_resource(u8 * byte_stream_buffer,
		     acpi_size * bytes_consumed,
		     u8 ** output_buffer, acpi_size * structure_size)
{
	u8 *buffer = byte_stream_buffer;
	struct acpi_resource *output_struct = (void *)*output_buffer;
	u16 temp16 = 0;
	u8 temp8 = 0;
	u8 index;
	u8 i;
	acpi_size struct_size = ACPI_SIZEOF_RESOURCE(struct acpi_resource_irq);

	ACPI_FUNCTION_TRACE("rs_irq_resource");

	/*
	 * The number of bytes consumed are contained in the descriptor
	 * (Bits:0-1)
	 */
	temp8 = *buffer;
	*bytes_consumed = (temp8 & 0x03) + 1;
	output_struct->id = ACPI_RSTYPE_IRQ;

	/* Point to the 16-bits of Bytes 1 and 2 */

	buffer += 1;
	ACPI_MOVE_16_TO_16(&temp16, buffer);

	output_struct->data.irq.number_of_interrupts = 0;

	/* Decode the IRQ bits */

	for (i = 0, index = 0; index < 16; index++) {
		if ((temp16 >> index) & 0x01) {
			output_struct->data.irq.interrupts[i] = index;
			i++;
		}
	}

	/* Zero interrupts is valid */

	output_struct->data.irq.number_of_interrupts = i;
	if (i > 0) {
		/* Calculate the structure size based upon the number of interrupts */

		struct_size += ((acpi_size) i - 1) * 4;
	}

	/* Point to Byte 3 if it is used */

	if (4 == *bytes_consumed) {
		buffer += 2;
		temp8 = *buffer;

		/* Check for HE, LL interrupts */

		switch (temp8 & 0x09) {
		case 0x01:	/* HE */
			output_struct->data.irq.edge_level =
			    ACPI_EDGE_SENSITIVE;
			output_struct->data.irq.active_high_low =
			    ACPI_ACTIVE_HIGH;
			break;

		case 0x08:	/* LL */
			output_struct->data.irq.edge_level =
			    ACPI_LEVEL_SENSITIVE;
			output_struct->data.irq.active_high_low =
			    ACPI_ACTIVE_LOW;
			break;

		default:
			/*
			 * Only _LL and _HE polarity/trigger interrupts
			 * are allowed (ACPI spec, section "IRQ Format")
			 * so 0x00 and 0x09 are illegal.
			 */
			ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
					  "Invalid interrupt polarity/trigger in resource list, %X\n",
					  temp8));
			return_ACPI_STATUS(AE_BAD_DATA);
		}

		/* Check for sharable */

		output_struct->data.irq.shared_exclusive = (temp8 >> 3) & 0x01;
	} else {
		/*
		 * Assume Edge Sensitive, Active High, Non-Sharable
		 * per ACPI Specification
		 */
		output_struct->data.irq.edge_level = ACPI_EDGE_SENSITIVE;
		output_struct->data.irq.active_high_low = ACPI_ACTIVE_HIGH;
		output_struct->data.irq.shared_exclusive = ACPI_EXCLUSIVE;
	}

	/* Set the Length parameter */

	output_struct->length = (u32) struct_size;

	/* Return the final size of the structure */

	*structure_size = struct_size;
	return_ACPI_STATUS(AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_rs_irq_stream
 *
 * PARAMETERS:  linked_list             - Pointer to the resource linked list
 *              output_buffer           - Pointer to the user's return buffer
 *              bytes_consumed          - Pointer to where the number of bytes
 *                                        used in the output_buffer is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Take the linked list resource structure and fills in the
 *              the appropriate bytes in a byte stream
 *
 ******************************************************************************/

acpi_status
acpi_rs_irq_stream(struct acpi_resource *linked_list,
		   u8 ** output_buffer, acpi_size * bytes_consumed)
{
	u8 *buffer = *output_buffer;
	u16 temp16 = 0;
	u8 temp8 = 0;
	u8 index;
	u8 IRqinfo_byte_needed;

	ACPI_FUNCTION_TRACE("rs_irq_stream");

	/*
	 * The descriptor field is set based upon whether a third byte is
	 * needed to contain the IRQ Information.
	 */
	if (ACPI_EDGE_SENSITIVE == linked_list->data.irq.edge_level &&
	    ACPI_ACTIVE_HIGH == linked_list->data.irq.active_high_low &&
	    ACPI_EXCLUSIVE == linked_list->data.irq.shared_exclusive) {
		*buffer = 0x22;
		IRqinfo_byte_needed = FALSE;
	} else {
		*buffer = 0x23;
		IRqinfo_byte_needed = TRUE;
	}

	buffer += 1;
	temp16 = 0;

	/* Loop through all of the interrupts and set the mask bits */

	for (index = 0;
	     index < linked_list->data.irq.number_of_interrupts; index++) {
		temp8 = (u8) linked_list->data.irq.interrupts[index];
		temp16 |= 0x1 << temp8;
	}

	ACPI_MOVE_16_TO_16(buffer, &temp16);
	buffer += 2;

	/* Set the IRQ Info byte if needed. */

	if (IRqinfo_byte_needed) {
		temp8 = 0;
		temp8 = (u8) ((linked_list->data.irq.shared_exclusive &
			       0x01) << 4);

		if (ACPI_LEVEL_SENSITIVE == linked_list->data.irq.edge_level &&
		    ACPI_ACTIVE_LOW == linked_list->data.irq.active_high_low) {
			temp8 |= 0x08;
		} else {
			temp8 |= 0x01;
		}

		*buffer = temp8;
		buffer += 1;
	}

	/* Return the number of bytes consumed in this operation */

	*bytes_consumed = ACPI_PTR_DIFF(buffer, *output_buffer);
	return_ACPI_STATUS(AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_rs_extended_irq_resource
 *
 * PARAMETERS:  byte_stream_buffer      - Pointer to the resource input byte
 *                                        stream
 *              bytes_consumed          - Pointer to where the number of bytes
 *                                        consumed the byte_stream_buffer is
 *                                        returned
 *              output_buffer           - Pointer to the return data buffer
 *              structure_size          - Pointer to where the number of bytes
 *                                        in the return data struct is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Take the resource byte stream and fill out the appropriate
 *              structure pointed to by the output_buffer. Return the
 *              number of bytes consumed from the byte stream.
 *
 ******************************************************************************/

acpi_status
acpi_rs_extended_irq_resource(u8 * byte_stream_buffer,
			      acpi_size * bytes_consumed,
			      u8 ** output_buffer, acpi_size * structure_size)
{
	u8 *buffer = byte_stream_buffer;
	struct acpi_resource *output_struct = (void *)*output_buffer;
	u16 temp16 = 0;
	u8 temp8 = 0;
	u8 *temp_ptr;
	u8 index;
	acpi_size struct_size =
	    ACPI_SIZEOF_RESOURCE(struct acpi_resource_ext_irq);

	ACPI_FUNCTION_TRACE("rs_extended_irq_resource");

	/* Get the Descriptor Length field */

	buffer += 1;
	ACPI_MOVE_16_TO_16(&temp16, buffer);

	/* Validate minimum descriptor length */

	if (temp16 < 6) {
		return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH);
	}

	*bytes_consumed = temp16 + 3;
	output_struct->id = ACPI_RSTYPE_EXT_IRQ;

	/* Point to the Byte3 */

	buffer += 2;
	temp8 = *buffer;

	output_struct->data.extended_irq.producer_consumer = temp8 & 0x01;

	/*
	 * Check for Interrupt Mode
	 *
	 * The definition of an Extended IRQ changed between ACPI spec v1.0b
	 * and ACPI spec 2.0 (section 6.4.3.6 in both).
	 *
	 * - Edge/Level are defined opposite in the table vs the headers
	 */
	output_struct->data.extended_irq.edge_level =
	    (temp8 & 0x2) ? ACPI_EDGE_SENSITIVE : ACPI_LEVEL_SENSITIVE;

	/* Check Interrupt Polarity */

	output_struct->data.extended_irq.active_high_low = (temp8 >> 2) & 0x1;

	/* Check for sharable */

	output_struct->data.extended_irq.shared_exclusive = (temp8 >> 3) & 0x01;

	/* Point to Byte4 (IRQ Table length) */

	buffer += 1;
	temp8 = *buffer;

	/* Must have at least one IRQ */

	if (temp8 < 1) {
		return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH);
	}

	output_struct->data.extended_irq.number_of_interrupts = temp8;

	/*
	 * Add any additional structure size to properly calculate
	 * the next pointer at the end of this function
	 */
	struct_size += (temp8 - 1) * 4;

	/* Point to Byte5 (First IRQ Number) */

	buffer += 1;

	/* Cycle through every IRQ in the table */

	for (index = 0; index < temp8; index++) {
		ACPI_MOVE_32_TO_32(&output_struct->data.extended_irq.
				   interrupts[index], buffer);

		/* Point to the next IRQ */

		buffer += 4;
	}

	/*
	 * This will leave us pointing to the Resource Source Index
	 * If it is present, then save it off and calculate the
	 * pointer to where the null terminated string goes:
	 * Each Interrupt takes 32-bits + the 5 bytes of the
	 * stream that are default.
	 *
	 * Note: Some resource descriptors will have an additional null, so
	 * we add 1 to the length.
	 */
	if (*bytes_consumed >
	    ((acpi_size) output_struct->data.extended_irq.number_of_interrupts *
	     4) + (5 + 1)) {
		/* Dereference the Index */

		temp8 = *buffer;
		output_struct->data.extended_irq.resource_source.index =
		    (u32) temp8;

		/* Point to the String */

		buffer += 1;

		/* Point the String pointer to the end of this structure. */

		output_struct->data.extended_irq.resource_source.string_ptr =
		    (char *)((char *)output_struct + struct_size);

		temp_ptr = (u8 *)
		    output_struct->data.extended_irq.resource_source.string_ptr;

		/* Copy the string into the buffer */

		index = 0;
		while (*buffer) {
			*temp_ptr = *buffer;

			temp_ptr += 1;
			buffer += 1;
			index += 1;
		}

		/* Add the terminating null */

		*temp_ptr = 0;
		output_struct->data.extended_irq.resource_source.string_length =
		    index + 1;

		/*
		 * In order for the struct_size to fall on a 32-bit boundary,
		 * calculate the length of the string and expand the
		 * struct_size to the next 32-bit boundary.
		 */
		temp8 = (u8) (index + 1);
		struct_size += ACPI_ROUND_UP_to_32_bITS(temp8);
	} else {
		output_struct->data.extended_irq.resource_source.index = 0;
		output_struct->data.extended_irq.resource_source.string_length =
		    0;
		output_struct->data.extended_irq.resource_source.string_ptr =
		    NULL;
	}

	/* Set the Length parameter */

	output_struct->length = (u32) struct_size;

	/* Return the final size of the structure */

	*structure_size = struct_size;
	return_ACPI_STATUS(AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_rs_extended_irq_stream
 *
 * PARAMETERS:  linked_list             - Pointer to the resource linked list
 *              output_buffer           - Pointer to the user's return buffer
 *              bytes_consumed          - Pointer to where the number of bytes
 *                                        used in the output_buffer is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Take the linked list resource structure and fills in the
 *              the appropriate bytes in a byte stream
 *
 ******************************************************************************/

acpi_status
acpi_rs_extended_irq_stream(struct acpi_resource *linked_list,
			    u8 ** output_buffer, acpi_size * bytes_consumed)
{
	u8 *buffer = *output_buffer;
	u16 *length_field;
	u8 temp8 = 0;
	u8 index;

	ACPI_FUNCTION_TRACE("rs_extended_irq_stream");

	/* Set the Descriptor Type field */

	*buffer = ACPI_RDESC_TYPE_EXTENDED_XRUPT;
	buffer += 1;

	/* Save a pointer to the Length field - to be filled in later */

	length_field = ACPI_CAST_PTR(u16, buffer);
	buffer += 2;

	/* Set the Interrupt vector flags */

	temp8 = (u8) (linked_list->data.extended_irq.producer_consumer & 0x01);
	temp8 |=
	    ((linked_list->data.extended_irq.shared_exclusive & 0x01) << 3);

	/*
	 * Set the Interrupt Mode
	 *
	 * The definition of an Extended IRQ changed between ACPI spec v1.0b
	 * and ACPI spec 2.0 (section 6.4.3.6 in both).  This code does not
	 * implement the more restrictive definition of 1.0b
	 *
	 * - Edge/Level are defined opposite in the table vs the headers
	 */
	if (ACPI_EDGE_SENSITIVE == linked_list->data.extended_irq.edge_level) {
		temp8 |= 0x2;
	}

	/* Set the Interrupt Polarity */

	temp8 |= ((linked_list->data.extended_irq.active_high_low & 0x1) << 2);

	*buffer = temp8;
	buffer += 1;

	/* Set the Interrupt table length */

	temp8 = (u8) linked_list->data.extended_irq.number_of_interrupts;

	*buffer = temp8;
	buffer += 1;

	for (index = 0;
	     index < linked_list->data.extended_irq.number_of_interrupts;
	     index++) {
		ACPI_MOVE_32_TO_32(buffer,
				   &linked_list->data.extended_irq.
				   interrupts[index]);
		buffer += 4;
	}

	/* Resource Source Index and Resource Source are optional */

	if (0 != linked_list->data.extended_irq.resource_source.string_length) {
		*buffer =
		    (u8) linked_list->data.extended_irq.resource_source.index;
		buffer += 1;

		/* Copy the string */

		ACPI_STRCPY((char *)buffer,
			    linked_list->data.extended_irq.resource_source.
			    string_ptr);

		/*
		 * Buffer needs to be set to the length of the string + one for the
		 * terminating null
		 */
		buffer +=
		    (acpi_size) (ACPI_STRLEN
				 (linked_list->data.extended_irq.
				  resource_source.string_ptr) + 1);
	}

	/* Return the number of bytes consumed in this operation */

	*bytes_consumed = ACPI_PTR_DIFF(buffer, *output_buffer);

	/*
	 * Set the length field to the number of bytes consumed
	 * minus the header size (3 bytes)
	 */
	*length_field = (u16) (*bytes_consumed - 3);
	return_ACPI_STATUS(AE_OK);
}
Commit	Line	Data
1da177e4 LT	1	/*******************************************************************************
	2	*
	3	* Module Name: rsirq - IRQ resource descriptors
	4	*
	5	******************************************************************************/
	6
	7	/*
	8	* Copyright (C) 2000 - 2005, R. Byron Moore
	9	* All rights reserved.
	10	*
	11	* Redistribution and use in source and binary forms, with or without
	12	* modification, are permitted provided that the following conditions
	13	* are met:
	14	* 1. Redistributions of source code must retain the above copyright
	15	* notice, this list of conditions, and the following disclaimer,
	16	* without modification.
	17	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	18	* substantially similar to the "NO WARRANTY" disclaimer below
	19	* ("Disclaimer") and any redistribution must be conditioned upon
	20	* including a substantially similar Disclaimer requirement for further
	21	* binary redistribution.
	22	* 3. Neither the names of the above-listed copyright holders nor the names
	23	* of any contributors may be used to endorse or promote products derived
	24	* from this software without specific prior written permission.
	25	*
	26	* Alternatively, this software may be distributed under the terms of the
	27	* GNU General Public License ("GPL") version 2 as published by the Free
	28	* Software Foundation.
	29	*
	30	* NO WARRANTY
	31	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	32	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	33	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
	34	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	35	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	36	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	37	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	38	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	39	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	40	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	41	* POSSIBILITY OF SUCH DAMAGES.
	42	*/
	43
1da177e4 LT	44	#include <acpi/acpi.h>
	45	#include <acpi/acresrc.h>
	46
	47	#define _COMPONENT ACPI_RESOURCES
4be44fcd	48	ACPI_MODULE_NAME("rsirq")
1da177e4 LT	49
	50	/*******************************************************************************
	51	*
	52	* FUNCTION: acpi_rs_irq_resource
	53	*
	54	* PARAMETERS: byte_stream_buffer - Pointer to the resource input byte
	55	* stream
	56	* bytes_consumed - Pointer to where the number of bytes
	57	* consumed the byte_stream_buffer is
	58	* returned
	59	* output_buffer - Pointer to the return data buffer
	60	* structure_size - Pointer to where the number of bytes
	61	* in the return data struct is returned
	62	*
	63	* RETURN: Status
	64	*
	65	* DESCRIPTION: Take the resource byte stream and fill out the appropriate
	66	* structure pointed to by the output_buffer. Return the
	67	* number of bytes consumed from the byte stream.
	68	*
	69	******************************************************************************/
1da177e4	70	acpi_status
4be44fcd LB	71	acpi_rs_irq_resource(u8 * byte_stream_buffer,
	72	acpi_size * bytes_consumed,
	73	u8 ** output_buffer, acpi_size * structure_size)
1da177e4	74	{
4be44fcd LB	75	u8 *buffer = byte_stream_buffer;
	76	struct acpi_resource output_struct = (void )*output_buffer;
	77	u16 temp16 = 0;
	78	u8 temp8 = 0;
	79	u8 index;
	80	u8 i;
	81	acpi_size struct_size = ACPI_SIZEOF_RESOURCE(struct acpi_resource_irq);
1da177e4	82
4be44fcd	83	ACPI_FUNCTION_TRACE("rs_irq_resource");
1da177e4 LT	84
	85	/*
	86	* The number of bytes consumed are contained in the descriptor
44f6c012	87	* (Bits:0-1)
1da177e4 LT	88	*/
	89	temp8 = *buffer;
	90	*bytes_consumed = (temp8 & 0x03) + 1;
	91	output_struct->id = ACPI_RSTYPE_IRQ;
	92
44f6c012 RM	93	/* Point to the 16-bits of Bytes 1 and 2 */
44f6c012 RM	94
1da177e4	95	buffer += 1;
4be44fcd	96	ACPI_MOVE_16_TO_16(&temp16, buffer);
1da177e4 LT	97
	98	output_struct->data.irq.number_of_interrupts = 0;
	99
	100	/* Decode the IRQ bits */
	101
	102	for (i = 0, index = 0; index < 16; index++) {
	103	if ((temp16 >> index) & 0x01) {
	104	output_struct->data.irq.interrupts[i] = index;
	105	i++;
	106	}
	107	}
	108
	109	/* Zero interrupts is valid */
	110
	111	output_struct->data.irq.number_of_interrupts = i;
	112	if (i > 0) {
44f6c012 RM	113	/* Calculate the structure size based upon the number of interrupts */
44f6c012 RM	114
1da177e4 LT	115	struct_size += ((acpi_size) i - 1) * 4;
	116	}
	117
44f6c012 RM	118	/* Point to Byte 3 if it is used */
44f6c012 RM	119
1da177e4 LT	120	if (4 == *bytes_consumed) {
	121	buffer += 2;
	122	temp8 = *buffer;
	123
44f6c012 RM	124	/* Check for HE, LL interrupts */
44f6c012 RM	125
1da177e4	126	switch (temp8 & 0x09) {
4be44fcd LB	127	case 0x01: /* HE */
	128	output_struct->data.irq.edge_level =
	129	ACPI_EDGE_SENSITIVE;
	130	output_struct->data.irq.active_high_low =
	131	ACPI_ACTIVE_HIGH;
1da177e4 LT	132	break;
1da177e4 LT	133
4be44fcd LB	134	case 0x08: /* LL */
	135	output_struct->data.irq.edge_level =
	136	ACPI_LEVEL_SENSITIVE;
	137	output_struct->data.irq.active_high_low =
	138	ACPI_ACTIVE_LOW;
1da177e4 LT	139	break;
	140
	141	default:
	142	/*
	143	* Only _LL and _HE polarity/trigger interrupts
	144	* are allowed (ACPI spec, section "IRQ Format")
	145	* so 0x00 and 0x09 are illegal.
	146	*/
4be44fcd LB	147	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
	148	"Invalid interrupt polarity/trigger in resource list, %X\n",
	149	temp8));
	150	return_ACPI_STATUS(AE_BAD_DATA);
1da177e4 LT	151	}
1da177e4 LT	152
44f6c012 RM	153	/* Check for sharable */
44f6c012 RM	154
1da177e4	155	output_struct->data.irq.shared_exclusive = (temp8 >> 3) & 0x01;
4be44fcd	156	} else {
1da177e4 LT	157	/*
	158	* Assume Edge Sensitive, Active High, Non-Sharable
	159	* per ACPI Specification
	160	*/
	161	output_struct->data.irq.edge_level = ACPI_EDGE_SENSITIVE;
	162	output_struct->data.irq.active_high_low = ACPI_ACTIVE_HIGH;
	163	output_struct->data.irq.shared_exclusive = ACPI_EXCLUSIVE;
	164	}
	165
44f6c012 RM	166	/* Set the Length parameter */
44f6c012 RM	167
1da177e4 LT	168	output_struct->length = (u32) struct_size;
1da177e4 LT	169
44f6c012 RM	170	/* Return the final size of the structure */
44f6c012 RM	171
1da177e4	172	*structure_size = struct_size;
4be44fcd	173	return_ACPI_STATUS(AE_OK);
1da177e4 LT	174	}
1da177e4 LT	175
1da177e4 LT	176	/*******************************************************************************
	177	*
	178	* FUNCTION: acpi_rs_irq_stream
	179	*
	180	* PARAMETERS: linked_list - Pointer to the resource linked list
	181	* output_buffer - Pointer to the user's return buffer
	182	* bytes_consumed - Pointer to where the number of bytes
	183	* used in the output_buffer is returned
	184	*
	185	* RETURN: Status
	186	*
	187	* DESCRIPTION: Take the linked list resource structure and fills in the
	188	* the appropriate bytes in a byte stream
	189	*
	190	******************************************************************************/
	191
	192	acpi_status
4be44fcd LB	193	acpi_rs_irq_stream(struct acpi_resource *linked_list,
4be44fcd LB	194	u8 ** output_buffer, acpi_size * bytes_consumed)
1da177e4	195	{
4be44fcd LB	196	u8 buffer = output_buffer;
	197	u16 temp16 = 0;
	198	u8 temp8 = 0;
	199	u8 index;
	200	u8 IRqinfo_byte_needed;
1da177e4	201
4be44fcd	202	ACPI_FUNCTION_TRACE("rs_irq_stream");
1da177e4 LT	203
	204	/*
	205	* The descriptor field is set based upon whether a third byte is
	206	* needed to contain the IRQ Information.
	207	*/
	208	if (ACPI_EDGE_SENSITIVE == linked_list->data.irq.edge_level &&
4be44fcd LB	209	ACPI_ACTIVE_HIGH == linked_list->data.irq.active_high_low &&
4be44fcd LB	210	ACPI_EXCLUSIVE == linked_list->data.irq.shared_exclusive) {
1da177e4 LT	211	*buffer = 0x22;
1da177e4 LT	212	IRqinfo_byte_needed = FALSE;
4be44fcd	213	} else {
1da177e4 LT	214	*buffer = 0x23;
	215	IRqinfo_byte_needed = TRUE;
	216	}
	217
	218	buffer += 1;
	219	temp16 = 0;
	220
44f6c012 RM	221	/* Loop through all of the interrupts and set the mask bits */
44f6c012 RM	222
4be44fcd LB	223	for (index = 0;
4be44fcd LB	224	index < linked_list->data.irq.number_of_interrupts; index++) {
1da177e4 LT	225	temp8 = (u8) linked_list->data.irq.interrupts[index];
	226	temp16 \|= 0x1 << temp8;
	227	}
	228
4be44fcd	229	ACPI_MOVE_16_TO_16(buffer, &temp16);
1da177e4 LT	230	buffer += 2;
1da177e4 LT	231
44f6c012 RM	232	/* Set the IRQ Info byte if needed. */
44f6c012 RM	233
1da177e4 LT	234	if (IRqinfo_byte_needed) {
	235	temp8 = 0;
	236	temp8 = (u8) ((linked_list->data.irq.shared_exclusive &
4be44fcd	237	0x01) << 4);
1da177e4 LT	238
1da177e4 LT	239	if (ACPI_LEVEL_SENSITIVE == linked_list->data.irq.edge_level &&
4be44fcd	240	ACPI_ACTIVE_LOW == linked_list->data.irq.active_high_low) {
1da177e4	241	temp8 \|= 0x08;
4be44fcd	242	} else {
1da177e4 LT	243	temp8 \|= 0x01;
	244	}
	245
	246	*buffer = temp8;
	247	buffer += 1;
	248	}
	249
44f6c012 RM	250	/* Return the number of bytes consumed in this operation */
44f6c012 RM	251
4be44fcd LB	252	bytes_consumed = ACPI_PTR_DIFF(buffer, output_buffer);
4be44fcd LB	253	return_ACPI_STATUS(AE_OK);
1da177e4 LT	254	}
1da177e4 LT	255
1da177e4 LT	256	/*******************************************************************************
	257	*
	258	* FUNCTION: acpi_rs_extended_irq_resource
	259	*
	260	* PARAMETERS: byte_stream_buffer - Pointer to the resource input byte
	261	* stream
	262	* bytes_consumed - Pointer to where the number of bytes
	263	* consumed the byte_stream_buffer is
	264	* returned
	265	* output_buffer - Pointer to the return data buffer
	266	* structure_size - Pointer to where the number of bytes
	267	* in the return data struct is returned
	268	*
	269	* RETURN: Status
	270	*
	271	* DESCRIPTION: Take the resource byte stream and fill out the appropriate
	272	* structure pointed to by the output_buffer. Return the
	273	* number of bytes consumed from the byte stream.
	274	*
	275	******************************************************************************/
	276
	277	acpi_status
4be44fcd LB	278	acpi_rs_extended_irq_resource(u8 * byte_stream_buffer,
	279	acpi_size * bytes_consumed,
	280	u8 ** output_buffer, acpi_size * structure_size)
1da177e4	281	{
4be44fcd LB	282	u8 *buffer = byte_stream_buffer;
	283	struct acpi_resource output_struct = (void )*output_buffer;
	284	u16 temp16 = 0;
	285	u8 temp8 = 0;
	286	u8 *temp_ptr;
	287	u8 index;
	288	acpi_size struct_size =
	289	ACPI_SIZEOF_RESOURCE(struct acpi_resource_ext_irq);
1da177e4	290
4be44fcd	291	ACPI_FUNCTION_TRACE("rs_extended_irq_resource");
1da177e4	292
aff8c277	293	/* Get the Descriptor Length field */
44f6c012	294
1da177e4	295	buffer += 1;
4be44fcd	296	ACPI_MOVE_16_TO_16(&temp16, buffer);
1da177e4 LT	297
	298	/* Validate minimum descriptor length */
	299
	300	if (temp16 < 6) {
4be44fcd	301	return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH);
1da177e4 LT	302	}
	303
	304	*bytes_consumed = temp16 + 3;
	305	output_struct->id = ACPI_RSTYPE_EXT_IRQ;
	306
44f6c012 RM	307	/* Point to the Byte3 */
44f6c012 RM	308
1da177e4 LT	309	buffer += 2;
	310	temp8 = *buffer;
	311
	312	output_struct->data.extended_irq.producer_consumer = temp8 & 0x01;
	313
	314	/*
	315	* Check for Interrupt Mode
	316	*
	317	* The definition of an Extended IRQ changed between ACPI spec v1.0b
	318	* and ACPI spec 2.0 (section 6.4.3.6 in both).
	319	*
	320	* - Edge/Level are defined opposite in the table vs the headers
	321	*/
	322	output_struct->data.extended_irq.edge_level =
4be44fcd	323	(temp8 & 0x2) ? ACPI_EDGE_SENSITIVE : ACPI_LEVEL_SENSITIVE;
44f6c012 RM	324
44f6c012 RM	325	/* Check Interrupt Polarity */
1da177e4	326
1da177e4 LT	327	output_struct->data.extended_irq.active_high_low = (temp8 >> 2) & 0x1;
1da177e4 LT	328
44f6c012 RM	329	/* Check for sharable */
44f6c012 RM	330
1da177e4 LT	331	output_struct->data.extended_irq.shared_exclusive = (temp8 >> 3) & 0x01;
1da177e4 LT	332
44f6c012 RM	333	/* Point to Byte4 (IRQ Table length) */
44f6c012 RM	334
1da177e4 LT	335	buffer += 1;
	336	temp8 = *buffer;
	337
	338	/* Must have at least one IRQ */
	339
	340	if (temp8 < 1) {
4be44fcd	341	return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH);
1da177e4 LT	342	}
	343
	344	output_struct->data.extended_irq.number_of_interrupts = temp8;
	345
	346	/*
	347	* Add any additional structure size to properly calculate
	348	* the next pointer at the end of this function
	349	*/
	350	struct_size += (temp8 - 1) * 4;
	351
44f6c012 RM	352	/* Point to Byte5 (First IRQ Number) */
44f6c012 RM	353
1da177e4 LT	354	buffer += 1;
1da177e4 LT	355
44f6c012 RM	356	/* Cycle through every IRQ in the table */
44f6c012 RM	357
1da177e4	358	for (index = 0; index < temp8; index++) {
4be44fcd LB	359	ACPI_MOVE_32_TO_32(&output_struct->data.extended_irq.
4be44fcd LB	360	interrupts[index], buffer);
1da177e4 LT	361
	362	/* Point to the next IRQ */
	363
	364	buffer += 4;
	365	}
	366
	367	/*
	368	* This will leave us pointing to the Resource Source Index
	369	* If it is present, then save it off and calculate the
	370	* pointer to where the null terminated string goes:
	371	* Each Interrupt takes 32-bits + the 5 bytes of the
	372	* stream that are default.
	373	*
	374	* Note: Some resource descriptors will have an additional null, so
	375	* we add 1 to the length.
	376	*/
	377	if (*bytes_consumed >
4be44fcd LB	378	((acpi_size) output_struct->data.extended_irq.number_of_interrupts *
4be44fcd LB	379	4) + (5 + 1)) {
1da177e4 LT	380	/* Dereference the Index */
	381
	382	temp8 = *buffer;
4be44fcd LB	383	output_struct->data.extended_irq.resource_source.index =
4be44fcd LB	384	(u32) temp8;
1da177e4 LT	385
	386	/* Point to the String */
	387
	388	buffer += 1;
	389
44f6c012 RM	390	/* Point the String pointer to the end of this structure. */
44f6c012 RM	391
1da177e4	392	output_struct->data.extended_irq.resource_source.string_ptr =
4be44fcd	393	(char )((char )output_struct + struct_size);
1da177e4	394
44f6c012	395	temp_ptr = (u8 *)
4be44fcd	396	output_struct->data.extended_irq.resource_source.string_ptr;
1da177e4 LT	397
	398	/* Copy the string into the buffer */
	399
	400	index = 0;
aff8c277	401	while (*buffer) {
1da177e4 LT	402	temp_ptr = buffer;
	403
	404	temp_ptr += 1;
	405	buffer += 1;
	406	index += 1;
	407	}
	408
44f6c012 RM	409	/* Add the terminating null */
44f6c012 RM	410
aff8c277	411	*temp_ptr = 0;
4be44fcd LB	412	output_struct->data.extended_irq.resource_source.string_length =
4be44fcd LB	413	index + 1;
1da177e4 LT	414
	415	/*
	416	* In order for the struct_size to fall on a 32-bit boundary,
	417	* calculate the length of the string and expand the
	418	* struct_size to the next 32-bit boundary.
	419	*/
	420	temp8 = (u8) (index + 1);
4be44fcd LB	421	struct_size += ACPI_ROUND_UP_to_32_bITS(temp8);
4be44fcd LB	422	} else {
aff8c277	423	output_struct->data.extended_irq.resource_source.index = 0;
4be44fcd LB	424	output_struct->data.extended_irq.resource_source.string_length =
	425	0;
	426	output_struct->data.extended_irq.resource_source.string_ptr =
	427	NULL;
1da177e4 LT	428	}
1da177e4 LT	429
44f6c012 RM	430	/* Set the Length parameter */
44f6c012 RM	431
1da177e4 LT	432	output_struct->length = (u32) struct_size;
1da177e4 LT	433
44f6c012 RM	434	/* Return the final size of the structure */
44f6c012 RM	435
1da177e4	436	*structure_size = struct_size;
4be44fcd	437	return_ACPI_STATUS(AE_OK);
1da177e4 LT	438	}
1da177e4 LT	439
1da177e4 LT	440	/*******************************************************************************
	441	*
	442	* FUNCTION: acpi_rs_extended_irq_stream
	443	*
	444	* PARAMETERS: linked_list - Pointer to the resource linked list
	445	* output_buffer - Pointer to the user's return buffer
	446	* bytes_consumed - Pointer to where the number of bytes
	447	* used in the output_buffer is returned
	448	*
	449	* RETURN: Status
	450	*
	451	* DESCRIPTION: Take the linked list resource structure and fills in the
	452	* the appropriate bytes in a byte stream
	453	*
	454	******************************************************************************/
	455
	456	acpi_status
4be44fcd LB	457	acpi_rs_extended_irq_stream(struct acpi_resource *linked_list,
4be44fcd LB	458	u8 ** output_buffer, acpi_size * bytes_consumed)
1da177e4	459	{
4be44fcd LB	460	u8 buffer = output_buffer;
	461	u16 *length_field;
	462	u8 temp8 = 0;
	463	u8 index;
1da177e4	464
4be44fcd	465	ACPI_FUNCTION_TRACE("rs_extended_irq_stream");
1da177e4	466
aff8c277	467	/* Set the Descriptor Type field */
44f6c012	468
aff8c277	469	*buffer = ACPI_RDESC_TYPE_EXTENDED_XRUPT;
1da177e4 LT	470	buffer += 1;
1da177e4 LT	471
aff8c277	472	/* Save a pointer to the Length field - to be filled in later */
44f6c012	473
4be44fcd	474	length_field = ACPI_CAST_PTR(u16, buffer);
1da177e4 LT	475	buffer += 2;
1da177e4 LT	476
44f6c012 RM	477	/* Set the Interrupt vector flags */
44f6c012 RM	478
4be44fcd LB	479	temp8 = (u8) (linked_list->data.extended_irq.producer_consumer & 0x01);
	480	temp8 \|=
	481	((linked_list->data.extended_irq.shared_exclusive & 0x01) << 3);
1da177e4 LT	482
	483	/*
	484	* Set the Interrupt Mode
	485	*
	486	* The definition of an Extended IRQ changed between ACPI spec v1.0b
	487	* and ACPI spec 2.0 (section 6.4.3.6 in both). This code does not
	488	* implement the more restrictive definition of 1.0b
	489	*
	490	* - Edge/Level are defined opposite in the table vs the headers
	491	*/
	492	if (ACPI_EDGE_SENSITIVE == linked_list->data.extended_irq.edge_level) {
	493	temp8 \|= 0x2;
	494	}
	495
44f6c012 RM	496	/* Set the Interrupt Polarity */
44f6c012 RM	497
1da177e4 LT	498	temp8 \|= ((linked_list->data.extended_irq.active_high_low & 0x1) << 2);
	499
	500	*buffer = temp8;
	501	buffer += 1;
	502
44f6c012 RM	503	/* Set the Interrupt table length */
44f6c012 RM	504
1da177e4 LT	505	temp8 = (u8) linked_list->data.extended_irq.number_of_interrupts;
	506
	507	*buffer = temp8;
	508	buffer += 1;
	509
4be44fcd LB	510	for (index = 0;
	511	index < linked_list->data.extended_irq.number_of_interrupts;
	512	index++) {
	513	ACPI_MOVE_32_TO_32(buffer,
	514	&linked_list->data.extended_irq.
	515	interrupts[index]);
1da177e4 LT	516	buffer += 4;
	517	}
	518
44f6c012 RM	519	/* Resource Source Index and Resource Source are optional */
44f6c012 RM	520
1da177e4	521	if (0 != linked_list->data.extended_irq.resource_source.string_length) {
4be44fcd LB	522	*buffer =
4be44fcd LB	523	(u8) linked_list->data.extended_irq.resource_source.index;
1da177e4 LT	524	buffer += 1;
1da177e4 LT	525
44f6c012 RM	526	/* Copy the string */
44f6c012 RM	527
aff8c277	528	ACPI_STRCPY((char *)buffer,
4be44fcd LB	529	linked_list->data.extended_irq.resource_source.
4be44fcd LB	530	string_ptr);
1da177e4 LT	531
1da177e4 LT	532	/*
aff8c277	533	* Buffer needs to be set to the length of the string + one for the
1da177e4 LT	534	* terminating null
1da177e4 LT	535	*/
4be44fcd LB	536	buffer +=
	537	(acpi_size) (ACPI_STRLEN
	538	(linked_list->data.extended_irq.
	539	resource_source.string_ptr) + 1);
1da177e4 LT	540	}
1da177e4 LT	541
44f6c012 RM	542	/* Return the number of bytes consumed in this operation */
44f6c012 RM	543
4be44fcd	544	bytes_consumed = ACPI_PTR_DIFF(buffer, output_buffer);
1da177e4 LT	545
	546	/*
	547	* Set the length field to the number of bytes consumed
	548	* minus the header size (3 bytes)
	549	*/
	550	length_field = (u16) (bytes_consumed - 3);
4be44fcd	551	return_ACPI_STATUS(AE_OK);
1da177e4	552	}