[deliverable/linux.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_get_irq
 *
 * PARAMETERS:  Aml                 - Pointer to the AML resource descriptor
 *              aml_resource_length - Length of the resource from the AML header
 *              Resource            - Where the internal resource is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Convert a raw AML resource descriptor to the corresponding
 *              internal resource descriptor, simplifying bitflags and handling
 *              alignment and endian issues if necessary.
 *
 ******************************************************************************/
acpi_status
acpi_rs_get_irq(union aml_resource *aml,
		u16 aml_resource_length, struct acpi_resource *resource)
{
	u16 temp16 = 0;
	u32 interrupt_count = 0;
	u32 i;
	u32 resource_length;

	ACPI_FUNCTION_TRACE("rs_get_irq");

	/* Get the IRQ mask (bytes 1:2) */

	ACPI_MOVE_16_TO_16(&temp16, &aml->irq.irq_mask);

	/* Decode the IRQ bits (up to 16 possible) */

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

	/* Zero interrupts is valid */

	resource_length = 0;
	resource->data.irq.interrupt_count = interrupt_count;
	if (interrupt_count > 0) {
		/* Calculate the structure size based upon the number of interrupts */

		resource_length = (u32) (interrupt_count - 1) * 4;
	}

	/* Get Flags (Byte 3) if it is used */

	if (aml_resource_length == 3) {
		/* Check for HE, LL interrupts */

		switch (aml->irq.flags & 0x09) {
		case 0x01:	/* HE */
			resource->data.irq.triggering = ACPI_EDGE_SENSITIVE;
			resource->data.irq.polarity = ACPI_ACTIVE_HIGH;
			break;

		case 0x08:	/* LL */
			resource->data.irq.triggering = ACPI_LEVEL_SENSITIVE;
			resource->data.irq.polarity = 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",
					  aml->irq.flags));
			return_ACPI_STATUS(AE_BAD_DATA);
		}

		/* Get Sharing flag */

		resource->data.irq.sharable = (aml->irq.flags >> 3) & 0x01;
	} else {
		/*
		 * Default configuration: assume Edge Sensitive, Active High,
		 * Non-Sharable as per the ACPI Specification
		 */
		resource->data.irq.triggering = ACPI_EDGE_SENSITIVE;
		resource->data.irq.polarity = ACPI_ACTIVE_HIGH;
		resource->data.irq.sharable = ACPI_EXCLUSIVE;
	}

	/* Complete the resource header */

	resource->type = ACPI_RESOURCE_TYPE_IRQ;
	resource->length =
	    resource_length + ACPI_SIZEOF_RESOURCE(struct acpi_resource_irq);
	return_ACPI_STATUS(AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_rs_set_irq
 *
 * PARAMETERS:  Resource            - Pointer to the resource descriptor
 *              Aml                 - Where the AML descriptor is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Convert an internal resource descriptor to the corresponding
 *              external AML resource descriptor.
 *
 ******************************************************************************/

acpi_status
acpi_rs_set_irq(struct acpi_resource *resource, union aml_resource *aml)
{
	acpi_size descriptor_length;
	u16 irq_mask;
	u8 i;

	ACPI_FUNCTION_TRACE("rs_set_irq");

	/* Convert interrupt list to 16-bit IRQ bitmask */

	irq_mask = 0;
	for (i = 0; i < resource->data.irq.interrupt_count; i++) {
		irq_mask |= (1 << resource->data.irq.interrupts[i]);
	}

	/* Set the interrupt mask */

	ACPI_MOVE_16_TO_16(&aml->irq.irq_mask, &irq_mask);

	/*
	 * The descriptor field is set based upon whether a third byte is
	 * needed to contain the IRQ Information.
	 */
	if ((resource->data.irq.triggering == ACPI_EDGE_SENSITIVE) &&
	    (resource->data.irq.polarity == ACPI_ACTIVE_HIGH) &&
	    (resource->data.irq.sharable == ACPI_EXCLUSIVE)) {
		/* irq_no_flags() descriptor can be used */

		descriptor_length = sizeof(struct aml_resource_irq_noflags);
	} else {
		/* Irq() descriptor must be used */

		descriptor_length = sizeof(struct aml_resource_irq);

		/* Set the IRQ Info byte */

		aml->irq.flags = (u8)
		    ((resource->data.irq.sharable & 0x01) << 4);

		if (ACPI_LEVEL_SENSITIVE == resource->data.irq.triggering &&
		    ACPI_ACTIVE_LOW == resource->data.irq.polarity) {
			aml->irq.flags |= 0x08;
		} else {
			aml->irq.flags |= 0x01;
		}
	}

	/* Complete the AML descriptor header */

	acpi_rs_set_resource_header(ACPI_RESOURCE_NAME_IRQ, descriptor_length,
				    aml);
	return_ACPI_STATUS(AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_rs_get_ext_irq
 *
 * PARAMETERS:  Aml                 - Pointer to the AML resource descriptor
 *              aml_resource_length - Length of the resource from the AML header
 *              Resource            - Where the internal resource is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Convert a raw AML resource descriptor to the corresponding
 *              internal resource descriptor, simplifying bitflags and handling
 *              alignment and endian issues if necessary.
 *
 ******************************************************************************/

acpi_status
acpi_rs_get_ext_irq(union aml_resource *aml,
		    u16 aml_resource_length, struct acpi_resource *resource)
{
	char *out_resource_string;
	u8 temp8;

	ACPI_FUNCTION_TRACE("rs_get_ext_irq");

	/* Get the flag bits */

	temp8 = aml->extended_irq.flags;
	resource->data.extended_irq.producer_consumer = temp8 & 0x01;
	resource->data.extended_irq.polarity = (temp8 >> 2) & 0x01;
	resource->data.extended_irq.sharable = (temp8 >> 3) & 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
	 */
	resource->data.extended_irq.triggering =
	    (temp8 & 0x2) ? ACPI_EDGE_SENSITIVE : ACPI_LEVEL_SENSITIVE;

	/* Get the IRQ Table length (Byte4) */

	temp8 = aml->extended_irq.table_length;
	resource->data.extended_irq.interrupt_count = temp8;
	if (temp8 < 1) {
		/* Must have at least one IRQ */

		return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH);
	}

	/*
	 * Add any additional structure size to properly calculate
	 * the next pointer at the end of this function
	 */
	resource->length = (temp8 - 1) * 4;
	out_resource_string = ACPI_CAST_PTR(char,
					    (&resource->data.extended_irq.
					     interrupts[0] + temp8));

	/* Get every IRQ in the table, each is 32 bits */

	acpi_rs_move_data(resource->data.extended_irq.interrupts,
			  aml->extended_irq.interrupt_number,
			  (u16) temp8, ACPI_MOVE_TYPE_32_TO_32);

	/* Get the optional resource_source (index and string) */

	resource->length +=
	    acpi_rs_get_resource_source(aml_resource_length,
					(acpi_size) resource->length +
					sizeof(struct
					       aml_resource_extended_irq),
					&resource->data.extended_irq.
					resource_source, aml,
					out_resource_string);

	/* Complete the resource header */

	resource->type = ACPI_RESOURCE_TYPE_EXTENDED_IRQ;
	resource->length +=
	    ACPI_SIZEOF_RESOURCE(struct acpi_resource_extended_irq);
	return_ACPI_STATUS(AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_rs_set_ext_irq
 *
 * PARAMETERS:  Resource            - Pointer to the resource descriptor
 *              Aml                 - Where the AML descriptor is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Convert an internal resource descriptor to the corresponding
 *              external AML resource descriptor.
 *
 ******************************************************************************/

acpi_status
acpi_rs_set_ext_irq(struct acpi_resource *resource, union aml_resource *aml)
{
	acpi_size descriptor_length;

	ACPI_FUNCTION_TRACE("rs_set_ext_irq");

	/* Set the Interrupt vector flags */

	aml->extended_irq.flags = (u8)
	    ((resource->data.extended_irq.producer_consumer & 0x01) |
	     ((resource->data.extended_irq.sharable & 0x01) << 3) |
	     ((resource->data.extended_irq.polarity & 0x1) << 2));

	/*
	 * 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 (resource->data.extended_irq.triggering == ACPI_EDGE_SENSITIVE) {
		aml->extended_irq.flags |= 0x02;
	}

	/* Set the Interrupt table length */

	aml->extended_irq.table_length = (u8)
	    resource->data.extended_irq.interrupt_count;

	descriptor_length = (sizeof(struct aml_resource_extended_irq) - 4) +
	    ((acpi_size) resource->data.extended_irq.interrupt_count *
	     sizeof(u32));

	/* Set each interrupt value */

	acpi_rs_move_data(aml->extended_irq.interrupt_number,
			  resource->data.extended_irq.interrupts,
			  (u16) resource->data.extended_irq.interrupt_count,
			  ACPI_MOVE_TYPE_32_TO_32);

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

	descriptor_length = acpi_rs_set_resource_source(aml, descriptor_length,
							&resource->data.
							extended_irq.
							resource_source);

	/* Complete the AML descriptor header */

	acpi_rs_set_resource_header(ACPI_RESOURCE_NAME_EXTENDED_IRQ,
				    descriptor_length, aml);
	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	*
50eca3eb	52	* FUNCTION: acpi_rs_get_irq
1da177e4	53	*
50eca3eb BM	54	* PARAMETERS: Aml - Pointer to the AML resource descriptor
	55	* aml_resource_length - Length of the resource from the AML header
	56	* Resource - Where the internal resource is returned
1da177e4 LT	57	*
	58	* RETURN: Status
	59	*
50eca3eb BM	60	* DESCRIPTION: Convert a raw AML resource descriptor to the corresponding
	61	* internal resource descriptor, simplifying bitflags and handling
	62	* alignment and endian issues if necessary.
1da177e4 LT	63	*
1da177e4 LT	64	******************************************************************************/
1da177e4	65	acpi_status
50eca3eb BM	66	acpi_rs_get_irq(union aml_resource *aml,
50eca3eb BM	67	u16 aml_resource_length, struct acpi_resource *resource)
1da177e4	68	{
4be44fcd	69	u16 temp16 = 0;
50eca3eb BM	70	u32 interrupt_count = 0;
	71	u32 i;
	72	u32 resource_length;
1da177e4	73
50eca3eb	74	ACPI_FUNCTION_TRACE("rs_get_irq");
44f6c012	75
50eca3eb	76	/* Get the IRQ mask (bytes 1:2) */
1da177e4	77
50eca3eb	78	ACPI_MOVE_16_TO_16(&temp16, &aml->irq.irq_mask);
1da177e4	79
50eca3eb	80	/* Decode the IRQ bits (up to 16 possible) */
1da177e4	81
50eca3eb BM	82	for (i = 0; i < 16; i++) {
	83	if ((temp16 >> i) & 0x01) {
	84	resource->data.irq.interrupts[interrupt_count] = i;
	85	interrupt_count++;
1da177e4 LT	86	}
	87	}
	88
	89	/* Zero interrupts is valid */
	90
50eca3eb BM	91	resource_length = 0;
	92	resource->data.irq.interrupt_count = interrupt_count;
	93	if (interrupt_count > 0) {
44f6c012 RM	94	/* Calculate the structure size based upon the number of interrupts */
44f6c012 RM	95
50eca3eb	96	resource_length = (u32) (interrupt_count - 1) * 4;
1da177e4 LT	97	}
1da177e4 LT	98
50eca3eb	99	/* Get Flags (Byte 3) if it is used */
1da177e4	100
50eca3eb	101	if (aml_resource_length == 3) {
44f6c012 RM	102	/* Check for HE, LL interrupts */
44f6c012 RM	103
50eca3eb	104	switch (aml->irq.flags & 0x09) {
4be44fcd	105	case 0x01: /* HE */
50eca3eb BM	106	resource->data.irq.triggering = ACPI_EDGE_SENSITIVE;
50eca3eb BM	107	resource->data.irq.polarity = ACPI_ACTIVE_HIGH;
1da177e4 LT	108	break;
1da177e4 LT	109
4be44fcd	110	case 0x08: /* LL */
50eca3eb BM	111	resource->data.irq.triggering = ACPI_LEVEL_SENSITIVE;
50eca3eb BM	112	resource->data.irq.polarity = ACPI_ACTIVE_LOW;
1da177e4 LT	113	break;
	114
	115	default:
	116	/*
	117	* Only _LL and _HE polarity/trigger interrupts
	118	* are allowed (ACPI spec, section "IRQ Format")
	119	* so 0x00 and 0x09 are illegal.
	120	*/
4be44fcd LB	121	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
4be44fcd LB	122	"Invalid interrupt polarity/trigger in resource list, %X\n",
50eca3eb	123	aml->irq.flags));
4be44fcd	124	return_ACPI_STATUS(AE_BAD_DATA);
1da177e4 LT	125	}
1da177e4 LT	126
50eca3eb	127	/* Get Sharing flag */
44f6c012	128
50eca3eb	129	resource->data.irq.sharable = (aml->irq.flags >> 3) & 0x01;
4be44fcd	130	} else {
1da177e4	131	/*
50eca3eb BM	132	* Default configuration: assume Edge Sensitive, Active High,
50eca3eb BM	133	* Non-Sharable as per the ACPI Specification
1da177e4	134	*/
50eca3eb BM	135	resource->data.irq.triggering = ACPI_EDGE_SENSITIVE;
	136	resource->data.irq.polarity = ACPI_ACTIVE_HIGH;
	137	resource->data.irq.sharable = ACPI_EXCLUSIVE;
1da177e4 LT	138	}
1da177e4 LT	139
50eca3eb	140	/* Complete the resource header */
44f6c012	141
50eca3eb BM	142	resource->type = ACPI_RESOURCE_TYPE_IRQ;
	143	resource->length =
	144	resource_length + ACPI_SIZEOF_RESOURCE(struct acpi_resource_irq);
4be44fcd	145	return_ACPI_STATUS(AE_OK);
1da177e4 LT	146	}
1da177e4 LT	147
1da177e4 LT	148	/*******************************************************************************
1da177e4 LT	149	*
50eca3eb	150	* FUNCTION: acpi_rs_set_irq
1da177e4	151	*
50eca3eb BM	152	* PARAMETERS: Resource - Pointer to the resource descriptor
50eca3eb BM	153	* Aml - Where the AML descriptor is returned
1da177e4 LT	154	*
	155	* RETURN: Status
	156	*
50eca3eb BM	157	* DESCRIPTION: Convert an internal resource descriptor to the corresponding
50eca3eb BM	158	* external AML resource descriptor.
1da177e4 LT	159	*
	160	******************************************************************************/
	161
	162	acpi_status
50eca3eb	163	acpi_rs_set_irq(struct acpi_resource resource, union aml_resource aml)
1da177e4	164	{
50eca3eb BM	165	acpi_size descriptor_length;
	166	u16 irq_mask;
	167	u8 i;
	168
	169	ACPI_FUNCTION_TRACE("rs_set_irq");
1da177e4	170
50eca3eb BM	171	/* Convert interrupt list to 16-bit IRQ bitmask */
	172
	173	irq_mask = 0;
	174	for (i = 0; i < resource->data.irq.interrupt_count; i++) {
	175	irq_mask \|= (1 << resource->data.irq.interrupts[i]);
	176	}
	177
	178	/* Set the interrupt mask */
	179
	180	ACPI_MOVE_16_TO_16(&aml->irq.irq_mask, &irq_mask);
1da177e4 LT	181
	182	/*
	183	* The descriptor field is set based upon whether a third byte is
	184	* needed to contain the IRQ Information.
	185	*/
50eca3eb BM	186	if ((resource->data.irq.triggering == ACPI_EDGE_SENSITIVE) &&
	187	(resource->data.irq.polarity == ACPI_ACTIVE_HIGH) &&
	188	(resource->data.irq.sharable == ACPI_EXCLUSIVE)) {
	189	/* irq_no_flags() descriptor can be used */
44f6c012	190
50eca3eb BM	191	descriptor_length = sizeof(struct aml_resource_irq_noflags);
	192	} else {
	193	/* Irq() descriptor must be used */
1da177e4	194
50eca3eb	195	descriptor_length = sizeof(struct aml_resource_irq);
1da177e4	196
50eca3eb	197	/* Set the IRQ Info byte */
44f6c012	198
50eca3eb BM	199	aml->irq.flags = (u8)
50eca3eb BM	200	((resource->data.irq.sharable & 0x01) << 4);
1da177e4	201
50eca3eb BM	202	if (ACPI_LEVEL_SENSITIVE == resource->data.irq.triggering &&
	203	ACPI_ACTIVE_LOW == resource->data.irq.polarity) {
	204	aml->irq.flags \|= 0x08;
4be44fcd	205	} else {
50eca3eb	206	aml->irq.flags \|= 0x01;
1da177e4	207	}
1da177e4 LT	208	}
1da177e4 LT	209
50eca3eb	210	/* Complete the AML descriptor header */
44f6c012	211
50eca3eb BM	212	acpi_rs_set_resource_header(ACPI_RESOURCE_NAME_IRQ, descriptor_length,
50eca3eb BM	213	aml);
4be44fcd	214	return_ACPI_STATUS(AE_OK);
1da177e4 LT	215	}
1da177e4 LT	216
1da177e4 LT	217	/*******************************************************************************
1da177e4 LT	218	*
50eca3eb	219	* FUNCTION: acpi_rs_get_ext_irq
1da177e4	220	*
50eca3eb BM	221	* PARAMETERS: Aml - Pointer to the AML resource descriptor
	222	* aml_resource_length - Length of the resource from the AML header
	223	* Resource - Where the internal resource is returned
1da177e4 LT	224	*
	225	* RETURN: Status
	226	*
50eca3eb BM	227	* DESCRIPTION: Convert a raw AML resource descriptor to the corresponding
	228	* internal resource descriptor, simplifying bitflags and handling
	229	* alignment and endian issues if necessary.
1da177e4 LT	230	*
	231	******************************************************************************/
	232
	233	acpi_status
50eca3eb BM	234	acpi_rs_get_ext_irq(union aml_resource *aml,
50eca3eb BM	235	u16 aml_resource_length, struct acpi_resource *resource)
1da177e4	236	{
50eca3eb BM	237	char *out_resource_string;
50eca3eb BM	238	u8 temp8;
1da177e4	239
50eca3eb	240	ACPI_FUNCTION_TRACE("rs_get_ext_irq");
44f6c012	241
50eca3eb	242	/* Get the flag bits */
1da177e4	243
50eca3eb BM	244	temp8 = aml->extended_irq.flags;
	245	resource->data.extended_irq.producer_consumer = temp8 & 0x01;
	246	resource->data.extended_irq.polarity = (temp8 >> 2) & 0x01;
	247	resource->data.extended_irq.sharable = (temp8 >> 3) & 0x01;
1da177e4 LT	248
	249	/*
	250	* Check for Interrupt Mode
	251	*
	252	* The definition of an Extended IRQ changed between ACPI spec v1.0b
	253	* and ACPI spec 2.0 (section 6.4.3.6 in both).
	254	*
	255	* - Edge/Level are defined opposite in the table vs the headers
	256	*/
50eca3eb	257	resource->data.extended_irq.triggering =
4be44fcd	258	(temp8 & 0x2) ? ACPI_EDGE_SENSITIVE : ACPI_LEVEL_SENSITIVE;
44f6c012	259
50eca3eb	260	/* Get the IRQ Table length (Byte4) */
1da177e4	261
50eca3eb BM	262	temp8 = aml->extended_irq.table_length;
50eca3eb BM	263	resource->data.extended_irq.interrupt_count = temp8;
1da177e4	264	if (temp8 < 1) {
50eca3eb BM	265	/* Must have at least one IRQ */
50eca3eb BM	266
4be44fcd	267	return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH);
1da177e4 LT	268	}
1da177e4 LT	269
1da177e4 LT	270	/*
	271	* Add any additional structure size to properly calculate
	272	* the next pointer at the end of this function
	273	*/
50eca3eb BM	274	resource->length = (temp8 - 1) * 4;
	275	out_resource_string = ACPI_CAST_PTR(char,
	276	(&resource->data.extended_irq.
	277	interrupts[0] + temp8));
1da177e4	278
50eca3eb	279	/* Get every IRQ in the table, each is 32 bits */
44f6c012	280
50eca3eb BM	281	acpi_rs_move_data(resource->data.extended_irq.interrupts,
	282	aml->extended_irq.interrupt_number,
	283	(u16) temp8, ACPI_MOVE_TYPE_32_TO_32);
1da177e4	284
50eca3eb	285	/* Get the optional resource_source (index and string) */
44f6c012	286
50eca3eb BM	287	resource->length +=
	288	acpi_rs_get_resource_source(aml_resource_length,
	289	(acpi_size) resource->length +
	290	sizeof(struct
	291	aml_resource_extended_irq),
	292	&resource->data.extended_irq.
	293	resource_source, aml,
	294	out_resource_string);
1da177e4	295
50eca3eb	296	/* Complete the resource header */
1da177e4	297
50eca3eb BM	298	resource->type = ACPI_RESOURCE_TYPE_EXTENDED_IRQ;
	299	resource->length +=
	300	ACPI_SIZEOF_RESOURCE(struct acpi_resource_extended_irq);
4be44fcd	301	return_ACPI_STATUS(AE_OK);
1da177e4 LT	302	}
1da177e4 LT	303
1da177e4 LT	304	/*******************************************************************************
1da177e4 LT	305	*
50eca3eb	306	* FUNCTION: acpi_rs_set_ext_irq
1da177e4	307	*
50eca3eb BM	308	* PARAMETERS: Resource - Pointer to the resource descriptor
50eca3eb BM	309	* Aml - Where the AML descriptor is returned
1da177e4 LT	310	*
	311	* RETURN: Status
	312	*
50eca3eb BM	313	* DESCRIPTION: Convert an internal resource descriptor to the corresponding
50eca3eb BM	314	* external AML resource descriptor.
1da177e4 LT	315	*
	316	******************************************************************************/
	317
	318	acpi_status
50eca3eb	319	acpi_rs_set_ext_irq(struct acpi_resource resource, union aml_resource aml)
1da177e4	320	{
50eca3eb	321	acpi_size descriptor_length;
1da177e4	322
50eca3eb	323	ACPI_FUNCTION_TRACE("rs_set_ext_irq");
1da177e4	324
44f6c012 RM	325	/* Set the Interrupt vector flags */
44f6c012 RM	326
50eca3eb BM	327	aml->extended_irq.flags = (u8)
	328	((resource->data.extended_irq.producer_consumer & 0x01) \|
	329	((resource->data.extended_irq.sharable & 0x01) << 3) \|
	330	((resource->data.extended_irq.polarity & 0x1) << 2));
1da177e4 LT	331
	332	/*
	333	* Set the Interrupt Mode
	334	*
	335	* The definition of an Extended IRQ changed between ACPI spec v1.0b
	336	* and ACPI spec 2.0 (section 6.4.3.6 in both). This code does not
	337	* implement the more restrictive definition of 1.0b
	338	*
	339	* - Edge/Level are defined opposite in the table vs the headers
	340	*/
50eca3eb BM	341	if (resource->data.extended_irq.triggering == ACPI_EDGE_SENSITIVE) {
50eca3eb BM	342	aml->extended_irq.flags \|= 0x02;
1da177e4 LT	343	}
1da177e4 LT	344
44f6c012 RM	345	/* Set the Interrupt table length */
44f6c012 RM	346
50eca3eb BM	347	aml->extended_irq.table_length = (u8)
50eca3eb BM	348	resource->data.extended_irq.interrupt_count;
1da177e4	349
50eca3eb BM	350	descriptor_length = (sizeof(struct aml_resource_extended_irq) - 4) +
	351	((acpi_size) resource->data.extended_irq.interrupt_count *
	352	sizeof(u32));
44f6c012	353
50eca3eb	354	/* Set each interrupt value */
1da177e4	355
50eca3eb BM	356	acpi_rs_move_data(aml->extended_irq.interrupt_number,
	357	resource->data.extended_irq.interrupts,
	358	(u16) resource->data.extended_irq.interrupt_count,
	359	ACPI_MOVE_TYPE_32_TO_32);
44f6c012	360
50eca3eb	361	/* Resource Source Index and Resource Source are optional */
1da177e4	362
50eca3eb BM	363	descriptor_length = acpi_rs_set_resource_source(aml, descriptor_length,
	364	&resource->data.
	365	extended_irq.
	366	resource_source);
44f6c012	367
50eca3eb	368	/* Complete the AML descriptor header */
1da177e4	369
50eca3eb BM	370	acpi_rs_set_resource_header(ACPI_RESOURCE_NAME_EXTENDED_IRQ,
50eca3eb BM	371	descriptor_length, aml);
4be44fcd	372	return_ACPI_STATUS(AE_OK);
1da177e4	373	}