From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Garrett Subject: [PATCH 2/4] ACPI: Add _PLD support Date: Mon, 12 Mar 2012 19:58:53 -0400 Message-ID: <1331596735-3690-2-git-send-email-mjg@redhat.com> References: <1331596735-3690-1-git-send-email-mjg@redhat.com> Return-path: Received: from mx1.redhat.com ([209.132.183.28]:45078 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756870Ab2CLT6v (ORCPT ); Mon, 12 Mar 2012 15:58:51 -0400 In-Reply-To: <1331596735-3690-1-git-send-email-mjg@redhat.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-acpi@vger.kernel.org Cc: linux-usb@vger.kernel.org, lenb@kernel.org, gregkh@linuxfoundation.org, Matthew Garrett Add a simple helper function to allow drivers to obtain the physical device location data. Signed-off-by: Matthew Garrett --- drivers/acpi/utils.c | 29 +++++++++++++++++++++++++++++ include/acpi/acpi_bus.h | 31 +++++++++++++++++++++++++++++++ 2 files changed, 60 insertions(+) diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c index b002a47..5c320a0 100644 --- a/drivers/acpi/utils.c +++ b/drivers/acpi/utils.c @@ -382,3 +382,32 @@ acpi_evaluate_reference(acpi_handle handle, } EXPORT_SYMBOL(acpi_evaluate_reference); + +acpi_status +acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld *pld) +{ + acpi_status status; + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *output; + + status = acpi_evaluate_object(handle, "_PLD", NULL, &buffer); + + if (ACPI_FAILURE(status)) + return status; + + output = buffer.pointer; + + if (!output || output->type != ACPI_TYPE_PACKAGE + || !output->package.count + || output->package.elements[0].type != ACPI_TYPE_BUFFER + || output->package.elements[0].buffer.length > sizeof(*pld)) { + status = AE_TYPE; + goto out; + } + + memcpy(pld, output->package.elements[0].buffer.pointer, + output->package.elements[0].buffer.length); +out: + kfree(buffer.pointer); + return status; +} diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index 6cd5b64..39d7de9 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -51,6 +51,37 @@ acpi_evaluate_reference(acpi_handle handle, struct acpi_object_list *arguments, struct acpi_handle_list *list); +struct acpi_pld { + unsigned int revision:7; /* 0 */ + unsigned int ignore_colour:1; /* 7 */ + unsigned int colour:24; /* 8 */ + unsigned int width:16; /* 32 */ + unsigned int height:16; /* 48 */ + unsigned int user_visible:1; /* 64 */ + unsigned int dock:1; /* 65 */ + unsigned int lid:1; /* 66 */ + unsigned int panel:3; /* 67 */ + unsigned int vertical_pos:2; /* 70 */ + unsigned int horizontal_pos:2; /* 72 */ + unsigned int shape:4; /* 74 */ + unsigned int group_orientation:1; /* 78 */ + unsigned int group_token:8; /* 79 */ + unsigned int group_position:8; /* 87 */ + unsigned int bay:1; /* 95 */ + unsigned int ejectable:1; /* 96 */ + unsigned int ospm_eject_required:1; /* 97 */ + unsigned int cabinet_number:8; /* 98 */ + unsigned int card_cage_number:8; /* 106 */ + unsigned int reference:1; /* 114 */ + unsigned int rotation:4; /* 115 */ + unsigned int order:5; /* 119 */ + unsigned int reserved:4; /* 124 */ + unsigned int vertical_offset:16; /* 128 */ + unsigned int horizontal_offset:16; /* 144 */ +}; + +acpi_status +acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld *pld); #ifdef CONFIG_ACPI #include -- 1.7.9.3