Commit 2a7a8597 authored by Andy Grover's avatar Andy Grover

ACPI: Add new file for GPE code

parent 310958f6
...@@ -4,6 +4,6 @@ ...@@ -4,6 +4,6 @@
obj-y := evevent.o evregion.o evsci.o evxfevnt.o \ obj-y := evevent.o evregion.o evsci.o evxfevnt.o \
evmisc.o evrgnini.o evxface.o evxfregn.o \ evmisc.o evrgnini.o evxface.o evxfregn.o \
evgpe.o evgpe.o evgpeblk.o
EXTRA_CFLAGS += $(ACPI_CFLAGS) EXTRA_CFLAGS += $(ACPI_CFLAGS)
/******************************************************************************
*
* Module Name: evgpeblk - GPE block creation and initialization.
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2003, 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/acevents.h>
#include <acpi/acnamesp.h>
#define _COMPONENT ACPI_EVENTS
ACPI_MODULE_NAME ("evgpe")
/*******************************************************************************
*
* FUNCTION: acpi_ev_save_method_info
*
* PARAMETERS: Callback from walk_namespace
*
* RETURN: None
*
* DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
* control method under the _GPE portion of the namespace.
* Extract the name and GPE type from the object, saving this
* information for quick lookup during GPE dispatch
*
* The name of each GPE control method is of the form:
* "_Lnn" or "_Enn"
* Where:
* L - means that the GPE is level triggered
* E - means that the GPE is edge triggered
* nn - is the GPE number [in HEX]
*
******************************************************************************/
static acpi_status
acpi_ev_save_method_info (
acpi_handle obj_handle,
u32 level,
void *obj_desc,
void **return_value)
{
struct acpi_gpe_block_info *gpe_block = (void *) obj_desc;
struct acpi_gpe_event_info *gpe_event_info;
u32 gpe_number;
char name[ACPI_NAME_SIZE + 1];
u8 type;
acpi_status status;
ACPI_FUNCTION_NAME ("ev_save_method_info");
/* Extract the name from the object and convert to a string */
ACPI_MOVE_UNALIGNED32_TO_32 (name,
&((struct acpi_namespace_node *) obj_handle)->name.integer);
name[ACPI_NAME_SIZE] = 0;
/*
* Edge/Level determination is based on the 2nd character of the method name
*/
switch (name[1]) {
case 'L':
type = ACPI_EVENT_LEVEL_TRIGGERED;
break;
case 'E':
type = ACPI_EVENT_EDGE_TRIGGERED;
break;
default:
/* Unknown method type, just ignore it! */
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Unknown GPE method type: %s (name not of form _Lnn or _Enn)\n",
name));
return (AE_OK);
}
/* Convert the last two characters of the name to the GPE Number */
gpe_number = ACPI_STRTOUL (&name[2], NULL, 16);
if (gpe_number == ACPI_UINT32_MAX) {
/* Conversion failed; invalid method, just ignore it */
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Could not extract GPE number from name: %s (name is not of form _Lnn or _Enn)\n",
name));
return (AE_OK);
}
/* Ensure that we have a valid GPE number for this GPE block */
if ((gpe_number < gpe_block->block_base_number) ||
(gpe_number >= (gpe_block->register_count * 8))) {
/* Not valid, all we can do here is ignore it */
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"GPE number associated with method %s is not valid\n", name));
return (AE_OK);
}
/*
* Now we can add this information to the gpe_event_info block
* for use during dispatch of this GPE.
*/
gpe_event_info = &gpe_block->event_info[gpe_number - gpe_block->block_base_number];
gpe_event_info->type = type;
gpe_event_info->method_node = (struct acpi_namespace_node *) obj_handle;
/*
* Enable the GPE (SCIs should be disabled at this point)
*/
status = acpi_hw_enable_gpe (gpe_event_info);
if (ACPI_FAILURE (status)) {
return (status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Registered GPE method %s as GPE number %2.2X\n",
name, gpe_number));
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ev_install_gpe_block
*
* PARAMETERS: gpe_block - New GPE block
*
* RETURN: Status
*
* DESCRIPTION: Install new GPE block with mutex support
*
******************************************************************************/
acpi_status
acpi_ev_install_gpe_block (
struct acpi_gpe_block_info *gpe_block)
{
struct acpi_gpe_block_info *next_gpe_block;
acpi_status status;
status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
if (ACPI_FAILURE (status)) {
return (status);
}
/* Install the new block at the end of the global list */
if (acpi_gbl_gpe_block_list_head) {
next_gpe_block = acpi_gbl_gpe_block_list_head;
while (next_gpe_block->next) {
next_gpe_block = next_gpe_block->next;
}
next_gpe_block->next = gpe_block;
gpe_block->previous = next_gpe_block;
}
else {
acpi_gbl_gpe_block_list_head = gpe_block;
}
status = acpi_ut_release_mutex (ACPI_MTX_EVENTS);
return (status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ev_create_gpe_info_blocks
*
* PARAMETERS: gpe_block - New GPE block
*
* RETURN: Status
*
* DESCRIPTION: Create the register_info and event_info blocks for this GPE block
*
******************************************************************************/
acpi_status
acpi_ev_create_gpe_info_blocks (
struct acpi_gpe_block_info *gpe_block)
{
struct acpi_gpe_register_info *gpe_register_info = NULL;
struct acpi_gpe_event_info *gpe_event_info = NULL;
struct acpi_gpe_event_info *this_event;
struct acpi_gpe_register_info *this_register;
acpi_native_uint i;
acpi_native_uint j;
acpi_status status;
ACPI_FUNCTION_TRACE ("ev_create_gpe_info_blocks");
/* Allocate the GPE register information block */
gpe_register_info = ACPI_MEM_CALLOCATE (
(acpi_size) gpe_block->register_count *
sizeof (struct acpi_gpe_register_info));
if (!gpe_register_info) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Could not allocate the gpe_register_info table\n"));
return_ACPI_STATUS (AE_NO_MEMORY);
}
/*
* Allocate the GPE event_info block. There are eight distinct GPEs
* per register. Initialization to zeros is sufficient.
*/
gpe_event_info = ACPI_MEM_CALLOCATE (
((acpi_size) gpe_block->register_count * ACPI_GPE_REGISTER_WIDTH) *
sizeof (struct acpi_gpe_event_info));
if (!gpe_event_info) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not allocate the gpe_event_info table\n"));
status = AE_NO_MEMORY;
goto error_exit;
}
/*
* Initialize the GPE Register and Event structures. A goal of these
* tables is to hide the fact that there are two separate GPE register sets
* in a given gpe hardware block, the status registers occupy the first half,
* and the enable registers occupy the second half. Another goal is to hide
* the fact that there may be multiple GPE hardware blocks.
*/
this_register = gpe_register_info;
this_event = gpe_event_info;
for (i = 0; i < gpe_block->register_count; i++) {
/* Init the register_info for this GPE register (8 GPEs) */
this_register->base_gpe_number = (u8) (gpe_block->block_base_number +
(i * ACPI_GPE_REGISTER_WIDTH));
ACPI_STORE_ADDRESS (this_register->status_address.address,
(gpe_block->block_address.address
+ i));
ACPI_STORE_ADDRESS (this_register->enable_address.address,
(gpe_block->block_address.address
+ i
+ gpe_block->register_count));
this_register->status_address.address_space_id = gpe_block->block_address.address_space_id;
this_register->enable_address.address_space_id = gpe_block->block_address.address_space_id;
this_register->status_address.register_bit_width = ACPI_GPE_REGISTER_WIDTH;
this_register->enable_address.register_bit_width = ACPI_GPE_REGISTER_WIDTH;
this_register->status_address.register_bit_offset = ACPI_GPE_REGISTER_WIDTH;
this_register->enable_address.register_bit_offset = ACPI_GPE_REGISTER_WIDTH;
/* Init the event_info for each GPE within this register */
for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
this_event->bit_mask = acpi_gbl_decode_to8bit[j];
this_event->register_info = this_register;
this_event++;
}
/*
* Clear the status/enable registers. Note that status registers
* are cleared by writing a '1', while enable registers are cleared
* by writing a '0'.
*/
status = acpi_hw_low_level_write (ACPI_GPE_REGISTER_WIDTH, 0x00,
&this_register->enable_address, 0);
if (ACPI_FAILURE (status)) {
goto error_exit;
}
status = acpi_hw_low_level_write (ACPI_GPE_REGISTER_WIDTH, 0xFF,
&this_register->status_address, 0);
if (ACPI_FAILURE (status)) {
goto error_exit;
}
this_register++;
}
gpe_block->register_info = gpe_register_info;
gpe_block->event_info = gpe_event_info;
return_ACPI_STATUS (AE_OK);
error_exit:
if (gpe_register_info) {
ACPI_MEM_FREE (gpe_register_info);
}
if (gpe_event_info) {
ACPI_MEM_FREE (gpe_event_info);
}
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ev_create_gpe_block
*
* PARAMETERS: TBD
*
* RETURN: Status
*
* DESCRIPTION: Create and Install a block of GPE registers
*
******************************************************************************/
acpi_status
acpi_ev_create_gpe_block (
char *pathname,
struct acpi_generic_address *gpe_block_address,
u32 register_count,
u8 gpe_block_base_number,
u32 interrupt_level)
{
struct acpi_gpe_block_info *gpe_block;
acpi_status status;
acpi_handle obj_handle;
ACPI_FUNCTION_TRACE ("ev_create_gpe_block");
if (!register_count) {
return_ACPI_STATUS (AE_OK);
}
/* Get a handle to the parent object for this GPE block */
status = acpi_get_handle (NULL, pathname, &obj_handle);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Allocate a new GPE block */
gpe_block = ACPI_MEM_CALLOCATE (sizeof (struct acpi_gpe_block_info));
if (!gpe_block) {
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Initialize the new GPE block */
gpe_block->register_count = register_count;
gpe_block->block_base_number = gpe_block_base_number;
ACPI_MEMCPY (&gpe_block->block_address, gpe_block_address, sizeof (struct acpi_generic_address));
/* Create the register_info and event_info sub-structures */
status = acpi_ev_create_gpe_info_blocks (gpe_block);
if (ACPI_FAILURE (status)) {
ACPI_MEM_FREE (gpe_block);
return_ACPI_STATUS (status);
}
/* Install the new block in the global list(s) */
/* TBD: Install block in the interrupt handler list */
status = acpi_ev_install_gpe_block (gpe_block);
if (ACPI_FAILURE (status)) {
ACPI_MEM_FREE (gpe_block);
return_ACPI_STATUS (status);
}
/* Dump info about this GPE block */
ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "GPE Block: %X registers at %8.8X%8.8X\n",
gpe_block->register_count,
ACPI_HIDWORD (gpe_block->block_address.address),
ACPI_LODWORD (gpe_block->block_address.address)));
ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "GPE Block defined as GPE%d to GPE%d\n",
gpe_block->block_base_number,
(u32) (gpe_block->block_base_number +
((gpe_block->register_count * ACPI_GPE_REGISTER_WIDTH) -1))));
/* Find all GPE methods (_Lxx, _Exx) for this block */
status = acpi_walk_namespace (ACPI_TYPE_METHOD, obj_handle,
ACPI_UINT32_MAX, acpi_ev_save_method_info,
gpe_block, NULL);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ev_gpe_initialize
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Initialize the GPE data structures
*
******************************************************************************/
acpi_status
acpi_ev_gpe_initialize (void)
{
u32 register_count0 = 0;
u32 register_count1 = 0;
u32 gpe_number_max = 0;
ACPI_FUNCTION_TRACE ("ev_gpe_initialize");
/*
* Initialize the GPE Blocks defined in the FADT
*
* Why the GPE register block lengths are divided by 2: From the ACPI Spec,
* section "General-Purpose Event Registers", we have:
*
* "Each register block contains two registers of equal length
* GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the
* GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN
* The length of the GPE1_STS and GPE1_EN registers is equal to
* half the GPE1_LEN. If a generic register block is not supported
* then its respective block pointer and block length values in the
* FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need
* to be the same size."
*/
/*
* Determine the maximum GPE number for this machine.
*
* Note: both GPE0 and GPE1 are optional, and either can exist without
* the other.
* If EITHER the register length OR the block address are zero, then that
* particular block is not supported.
*/
if (acpi_gbl_FADT->gpe0_blk_len &&
acpi_gbl_FADT->xgpe0_blk.address) {
/* GPE block 0 exists (has both length and address > 0) */
register_count0 = (u16) (acpi_gbl_FADT->gpe0_blk_len / 2);
gpe_number_max = (register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1;
acpi_ev_create_gpe_block ("\\_GPE", &acpi_gbl_FADT->xgpe0_blk,
register_count0, 0, acpi_gbl_FADT->sci_int);
}
if (acpi_gbl_FADT->gpe1_blk_len &&
acpi_gbl_FADT->xgpe1_blk.address) {
/* GPE block 1 exists (has both length and address > 0) */
register_count1 = (u16) (acpi_gbl_FADT->gpe1_blk_len / 2);
/* Check for GPE0/GPE1 overlap (if both banks exist) */
if ((register_count0) &&
(gpe_number_max >= acpi_gbl_FADT->gpe1_base)) {
ACPI_REPORT_ERROR ((
"GPE0 block (GPE 0 to %d) overlaps the GPE1 block (GPE %d to %d) - Ignoring GPE1\n",
gpe_number_max, acpi_gbl_FADT->gpe1_base,
acpi_gbl_FADT->gpe1_base +
((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1)));
/* Ignore GPE1 block by setting the register count to zero */
register_count1 = 0;
}
else {
acpi_ev_create_gpe_block ("\\_GPE", &acpi_gbl_FADT->xgpe1_blk,
register_count1, acpi_gbl_FADT->gpe1_base, acpi_gbl_FADT->sci_int);
/*
* GPE0 and GPE1 do not have to be contiguous in the GPE number space,
* But, GPE0 always starts at zero.
*/
gpe_number_max = acpi_gbl_FADT->gpe1_base +
((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1);
}
}
/* Exit if there are no GPE registers */
if ((register_count0 + register_count1) == 0) {
/* GPEs are not required by ACPI, this is OK */
ACPI_REPORT_INFO (("There are no GPE blocks defined in the FADT\n"));
return_ACPI_STATUS (AE_OK);
}
/* Check for Max GPE number out-of-range */
if (gpe_number_max > ACPI_GPE_MAX) {
ACPI_REPORT_ERROR (("Maximum GPE number from FADT is too large: 0x%X\n",
gpe_number_max));
return_ACPI_STATUS (AE_BAD_VALUE);
}
return_ACPI_STATUS (AE_OK);
}
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