diff options
Diffstat (limited to 'drivers/acpi/events/evgpeblk.c')
| -rw-r--r-- | drivers/acpi/events/evgpeblk.c | 159 |
1 files changed, 101 insertions, 58 deletions
diff --git a/drivers/acpi/events/evgpeblk.c b/drivers/acpi/events/evgpeblk.c index 7ca10c5f291..8efca2eac27 100644 --- a/drivers/acpi/events/evgpeblk.c +++ b/drivers/acpi/events/evgpeblk.c @@ -78,7 +78,7 @@ acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block); * * RETURN: TRUE if the gpe_event is valid * - * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL. + * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL. * Should be called only when the GPE lists are semaphore locked * and not subject to change. * @@ -264,7 +264,7 @@ acpi_ev_save_method_info(acpi_handle obj_handle, * 2) Edge/Level determination is based on the 2nd character * of the method name * - * NOTE: Default GPE type is RUNTIME. May be changed later to WAKE + * NOTE: Default GPE type is RUNTIME. May be changed later to WAKE * if a _PRW object is found that points to this GPE. */ switch (name[1]) { @@ -313,14 +313,14 @@ acpi_ev_save_method_info(acpi_handle obj_handle, /* * Now we can add this information to the gpe_event_info block - * for use during dispatch of this GPE. Default type is RUNTIME, although + * for use during dispatch of this GPE. Default type is RUNTIME, although * this may change when the _PRW methods are executed later. */ gpe_event_info = &gpe_block->event_info[gpe_number - gpe_block->block_base_number]; - gpe_event_info->flags = (u8) (type | ACPI_GPE_DISPATCH_METHOD | - ACPI_GPE_TYPE_RUNTIME); + gpe_event_info->flags = (u8) + (type | ACPI_GPE_DISPATCH_METHOD | ACPI_GPE_TYPE_RUNTIME); gpe_event_info->dispatch.method_node = (struct acpi_namespace_node *)obj_handle; @@ -341,11 +341,11 @@ acpi_ev_save_method_info(acpi_handle obj_handle, * * PARAMETERS: Callback from walk_namespace * - * RETURN: Status. NOTE: We ignore errors so that the _PRW walk is + * RETURN: Status. NOTE: We ignore errors so that the _PRW walk is * not aborted on a single _PRW failure. * * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a - * Device. Run the _PRW method. If present, extract the GPE + * Device. Run the _PRW method. If present, extract the GPE * number and mark the GPE as a WAKE GPE. * ******************************************************************************/ @@ -443,6 +443,7 @@ acpi_ev_match_prw_and_gpe(acpi_handle obj_handle, gpe_event_info->flags &= ~(ACPI_GPE_WAKE_ENABLED | ACPI_GPE_RUN_ENABLED); + status = acpi_ev_set_gpe_type(gpe_event_info, ACPI_GPE_TYPE_WAKE); if (ACPI_FAILURE(status)) { @@ -466,7 +467,7 @@ acpi_ev_match_prw_and_gpe(acpi_handle obj_handle, * * RETURN: A GPE interrupt block * - * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt + * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt * block per unique interrupt level used for GPEs. * Should be called only when the GPE lists are semaphore locked * and not subject to change. @@ -566,8 +567,9 @@ acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt) /* Disable this interrupt */ - status = acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number, - acpi_ev_gpe_xrupt_handler); + status = + acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number, + acpi_ev_gpe_xrupt_handler); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } @@ -750,7 +752,7 @@ acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block) /* * Allocate the GPE event_info block. There are eight distinct GPEs - * per register. Initialization to zeros is sufficient. + * per register. Initialization to zeros is sufficient. */ gpe_event_info = ACPI_MEM_CALLOCATE(((acpi_size) gpe_block-> register_count * @@ -769,9 +771,9 @@ acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block) gpe_block->event_info = gpe_event_info; /* - * Initialize the GPE Register and Event structures. A goal of these + * 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, + * in a given GPE hardware block, the status registers occupy the first half, * and the enable registers occupy the second half. */ this_register = gpe_register_info; @@ -812,11 +814,8 @@ acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block) 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'. - */ + /* Disable all GPEs within this register */ + status = acpi_hw_low_level_write(ACPI_GPE_REGISTER_WIDTH, 0x00, &this_register-> enable_address); @@ -824,6 +823,8 @@ acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block) goto error_exit; } + /* Clear any pending GPE events within this register */ + status = acpi_hw_low_level_write(ACPI_GPE_REGISTER_WIDTH, 0xFF, &this_register-> status_address); @@ -860,7 +861,9 @@ acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block) * * RETURN: Status * - * DESCRIPTION: Create and Install a block of GPE registers + * DESCRIPTION: Create and Install a block of GPE registers. All GPEs within + * the block are disabled at exit. + * Note: Assumes namespace is locked. * ******************************************************************************/ @@ -872,14 +875,8 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device, u32 interrupt_number, struct acpi_gpe_block_info **return_gpe_block) { - struct acpi_gpe_block_info *gpe_block; - struct acpi_gpe_event_info *gpe_event_info; - acpi_native_uint i; - acpi_native_uint j; - u32 wake_gpe_count; - u32 gpe_enabled_count; acpi_status status; - struct acpi_gpe_walk_info gpe_info; + struct acpi_gpe_block_info *gpe_block; ACPI_FUNCTION_TRACE("ev_create_gpe_block"); @@ -896,22 +893,24 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device, /* Initialize the new GPE block */ + gpe_block->node = gpe_device; gpe_block->register_count = register_count; gpe_block->block_base_number = gpe_block_base_number; - gpe_block->node = gpe_device; ACPI_MEMCPY(&gpe_block->block_address, gpe_block_address, sizeof(struct acpi_generic_address)); - /* Create the register_info and event_info sub-structures */ - + /* + * Create the register_info and event_info sub-structures + * Note: disables and clears all GPEs in the block + */ 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) */ + /* Install the new block in the global lists */ status = acpi_ev_install_gpe_block(gpe_block, interrupt_number); if (ACPI_FAILURE(status)) { @@ -926,16 +925,70 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device, acpi_ev_save_method_info, gpe_block, NULL); + /* Return the new block */ + + if (return_gpe_block) { + (*return_gpe_block) = gpe_block; + } + + ACPI_DEBUG_PRINT((ACPI_DB_INIT, + "GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n", + (u32) gpe_block->block_base_number, + (u32) (gpe_block->block_base_number + + ((gpe_block->register_count * + ACPI_GPE_REGISTER_WIDTH) - 1)), + gpe_device->name.ascii, gpe_block->register_count, + interrupt_number)); + + return_ACPI_STATUS(AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ev_initialize_gpe_block + * + * PARAMETERS: gpe_device - Handle to the parent GPE block + * gpe_block - Gpe Block info + * + * RETURN: Status + * + * DESCRIPTION: Initialize and enable a GPE block. First find and run any + * _PRT methods associated with the block, then enable the + * appropriate GPEs. + * Note: Assumes namespace is locked. + * + ******************************************************************************/ + +acpi_status +acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device, + struct acpi_gpe_block_info *gpe_block) +{ + acpi_status status; + struct acpi_gpe_event_info *gpe_event_info; + struct acpi_gpe_walk_info gpe_info; + u32 wake_gpe_count; + u32 gpe_enabled_count; + acpi_native_uint i; + acpi_native_uint j; + + ACPI_FUNCTION_TRACE("ev_initialize_gpe_block"); + + /* Ignore a null GPE block (e.g., if no GPE block 1 exists) */ + + if (!gpe_block) { + return_ACPI_STATUS(AE_OK); + } + /* - * Runtime option: Should Wake GPEs be enabled at runtime? The default - * is No, they should only be enabled just as the machine goes to sleep. + * Runtime option: Should wake GPEs be enabled at runtime? The default + * is no, they should only be enabled just as the machine goes to sleep. */ if (acpi_gbl_leave_wake_gpes_disabled) { /* - * Differentiate RUNTIME vs WAKE GPEs, via the _PRW control methods. - * (Each GPE that has one or more _PRWs that reference it is by - * definition a WAKE GPE and will not be enabled while the machine - * is running.) + * Differentiate runtime vs wake GPEs, via the _PRW control methods. + * Each GPE that has one or more _PRWs that reference it is by + * definition a wake GPE and will not be enabled while the machine + * is running. */ gpe_info.gpe_block = gpe_block; gpe_info.gpe_device = gpe_device; @@ -948,9 +1001,12 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device, } /* - * Enable all GPEs in this block that are 1) "runtime" or "run/wake" GPEs, - * and 2) have a corresponding _Lxx or _Exx method. All other GPEs must - * be enabled via the acpi_enable_gpe() external interface. + * Enable all GPEs in this block that have these attributes: + * 1) are "runtime" or "run/wake" GPEs, and + * 2) have a corresponding _Lxx or _Exx method + * + * Any other GPEs within this block must be enabled via the acpi_enable_gpe() + * external interface. */ wake_gpe_count = 0; gpe_enabled_count = 0; @@ -976,32 +1032,19 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device, } } - /* Dump info about this GPE block */ - - ACPI_DEBUG_PRINT((ACPI_DB_INIT, - "GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n", - (u32) gpe_block->block_base_number, - (u32) (gpe_block->block_base_number + - ((gpe_block->register_count * - ACPI_GPE_REGISTER_WIDTH) - 1)), - gpe_device->name.ascii, gpe_block->register_count, - interrupt_number)); - - /* Enable all valid GPEs found above */ - - status = acpi_hw_enable_runtime_gpe_block(NULL, gpe_block); - ACPI_DEBUG_PRINT((ACPI_DB_INIT, "Found %u Wake, Enabled %u Runtime GPEs in this block\n", wake_gpe_count, gpe_enabled_count)); - /* Return the new block */ + /* Enable all valid runtime GPEs found above */ - if (return_gpe_block) { - (*return_gpe_block) = gpe_block; + status = acpi_hw_enable_runtime_gpe_block(NULL, gpe_block); + if (ACPI_FAILURE(status)) { + ACPI_REPORT_ERROR(("Could not enable GPEs in gpe_block %p\n", + gpe_block)); } - return_ACPI_STATUS(AE_OK); + return_ACPI_STATUS(status); } /******************************************************************************* |