From patchwork Thu Dec 19 07:51:45 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chun-Yi Lee X-Patchwork-Id: 3375491 Return-Path: X-Original-To: patchwork-linux-acpi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 77F85C0D4A for ; Thu, 19 Dec 2013 07:58:13 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id ECAA82064D for ; Thu, 19 Dec 2013 07:58:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B904B20648 for ; Thu, 19 Dec 2013 07:58:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751832Ab3LSHx4 (ORCPT ); Thu, 19 Dec 2013 02:53:56 -0500 Received: from mail-pa0-f43.google.com ([209.85.220.43]:62243 "EHLO mail-pa0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750951Ab3LSHxx (ORCPT ); Thu, 19 Dec 2013 02:53:53 -0500 Received: by mail-pa0-f43.google.com with SMTP id bj1so824119pad.2 for ; Wed, 18 Dec 2013 23:53:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=1N3H7bBXzPSE1TeZrBu9JeHsRH7u75FC/R/ZtoKhY1A=; b=iRcDVn+5rKWXyHep6A35IH9z2RVsv+wIaGu4H0gWUOER3F3CHKeZ3VyfLvdhPRraYi VhX428/30mi0MGoh3UIbEjWyvNO2PhOAwusXWZJ1mk7GreJn4OyF7fotnlASv7uaB7EU NPQQNZccm9oTTH8Ztd/P792ew7M/MzXjuRnyaCVAjW7M4vtzC5OTkV6esORBIfpC2UM0 dPA0jgJQcGgetBxM0xwPVjpmGmM03UteKoVlKdThv+GYBgQpRf5cZ21sp2GHt4pPN1RE nSj+2Bop/SglO8X1iatg6SUcZKPkjMxgongMfHPREKTBzqvtV+kn4BI4q/ipXIBx4/4y joOQ== X-Received: by 10.68.99.99 with SMTP id ep3mr39452181pbb.107.1387439633265; Wed, 18 Dec 2013 23:53:53 -0800 (PST) Received: from localhost.localdomain ([130.57.30.250]) by mx.google.com with ESMTPSA id qp15sm5173154pbb.2.2013.12.18.23.53.43 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Wed, 18 Dec 2013 23:53:52 -0800 (PST) From: "Lee, Chun-Yi" To: "Rafael J. Wysocki" , Alessandro Zummo , "H. Peter Anvin" , Matt Fleming , Matthew Garrett Cc: Elliott@hp.com, samer.el-haj-mahmoud@hp.com, Oliver Neukum , werner@suse.com, trenn@suse.de, JBeulich@suse.com, linux-kernel@vger.kernel.org, rtc-linux@googlegroups.com, x86@kernel.org, "linux-efi@vger.kernel.org" , linux-acpi@vger.kernel.org, "Lee, Chun-Yi" Subject: [RFC PATCH 04/14] ACPI: Add ACPI 5.0 Time and Alarm Device driver Date: Thu, 19 Dec 2013 15:51:45 +0800 Message-Id: <1387439515-8926-5-git-send-email-jlee@suse.com> X-Mailer: git-send-email 1.6.0.2 In-Reply-To: <1387439515-8926-1-git-send-email-jlee@suse.com> References: <1387439515-8926-1-git-send-email-jlee@suse.com> Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Spam-Status: No, score=-7.3 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch add the driver of Time and Alarm Device in ACPI 5.0. Currently it only implemented get/set time functions and grab the capabilities of device when driver initial. This driver also register rtc-acpitad platform device for RTC ACPITAD stub driver using. Signed-off-by: Lee, Chun-Yi --- drivers/acpi/Makefile | 3 + drivers/acpi/acpi_tad.c | 176 +++++++++++++++++++++++++++++++++++++++++++++++ drivers/acpi/bus.c | 3 + drivers/acpi/internal.h | 5 ++ include/linux/acpi.h | 31 ++++++++ 5 files changed, 218 insertions(+), 0 deletions(-) create mode 100644 drivers/acpi/acpi_tad.c diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index 0331f91..d250b15 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -50,6 +50,9 @@ acpi-$(CONFIG_ACPI_NUMA) += numa.o ifdef CONFIG_ACPI_VIDEO acpi-y += video_detect.o endif +ifdef CONFIG_X86 +acpi-y += acpi_tad.o +endif # These are (potentially) separate modules diff --git a/drivers/acpi/acpi_tad.c b/drivers/acpi/acpi_tad.c new file mode 100644 index 0000000..c2200f3 --- /dev/null +++ b/drivers/acpi/acpi_tad.c @@ -0,0 +1,176 @@ +/* rtc.c - ACPI 5.0 Time and Alarm Driver + * + * Copyright (C) 2013 SUSE Linux Products GmbH. All rights reserved. + * Written by Lee, Chun-Yi (jlee@suse.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public Licence + * as published by the Free Software Foundation; either version + * 2 of the Licence, or (at your option) any later version. + */ +#include +#include +#include + +#include + +#define ACPI_TIME_ALARM_NAME "Time and Alarm" +ACPI_MODULE_NAME(ACPI_TIME_ALARM_NAME); +#define ACPI_TIME_ALARM_CLASS "time_alarm" + +static const struct acpi_device_id time_alarm_ids[] = { + {"ACPI000E", 0}, + {"", 0}, +}; +MODULE_DEVICE_TABLE(acpi, time_alarm_ids); + +static struct platform_device rtc_acpitad_dev = { + .name = "rtc-acpitad", + .id = -1, +}; + +static struct acpi_device *acpi_tad_dev; +static unsigned long long cap; + +int acpi_read_time(struct acpi_time *output) +{ + unsigned long flags; + struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *obj; + struct acpi_time *acpit; + acpi_status status; + + if (!acpi_tad_dev) + return -ENODEV; + + if (!(cap & TAD_CAP_GETSETTIME)) + return -EINVAL; + + if (!output) + return -EINVAL; + + spin_lock_irqsave(&rtc_lock, flags); + status = acpi_evaluate_object(acpi_tad_dev->handle, "_GRT", NULL, &result); + spin_unlock_irqrestore(&rtc_lock, flags); + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _GRT")); + return -ENODEV; + } + + obj = result.pointer; + if (!obj || + obj->type != ACPI_TYPE_BUFFER || + obj->buffer.length > sizeof(struct acpi_time) || + obj->buffer.length < offsetof(struct acpi_time, pad2)) { + dev_err(&acpi_tad_dev->dev, ACPI_TIME_ALARM_NAME + " Invalid _GRT data\n"); + return -EINVAL; + } + + acpit = (struct acpi_time *) obj->buffer.pointer; + if (acpit) { + output->year = acpit->year; + output->month = acpit->month; + output->day = acpit->day; + output->hour = acpit->hour; + output->minute = acpit->minute; + output->second = acpit->second; + output->milliseconds = acpit->milliseconds; + output->timezone = acpit->timezone; + output->daylight = acpit->daylight; + } + + return 0; +} +EXPORT_SYMBOL(acpi_read_time); + +int acpi_set_time(struct acpi_time *acpit) +{ + unsigned long flags; + struct acpi_object_list input; + union acpi_object params[1]; + unsigned long long output; + acpi_status status; + + if (!acpi_tad_dev) + return -ENODEV; + + if (!(cap & TAD_CAP_GETSETTIME)) + return -EINVAL; + + if (!acpit) + return -EINVAL; + + input.count = 1; + input.pointer = params; + params[0].type = ACPI_TYPE_BUFFER; + params[0].buffer.length = sizeof(struct acpi_time); + params[0].buffer.pointer = (void *) acpit; + + spin_lock_irqsave(&rtc_lock, flags); + status = acpi_evaluate_integer(acpi_tad_dev->handle, "_SRT", &input, &output); + spin_unlock_irqrestore(&rtc_lock, flags); + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _SRT")); + return -ENODEV; + } + + return 0; +} +EXPORT_SYMBOL(acpi_set_time); + +int acpi_tad_get_capability(unsigned long *output) +{ + if (!acpi_tad_dev) + return -ENODEV; + + *output = cap; + + return 0; +} +EXPORT_SYMBOL(acpi_tad_get_capability); + +static int acpi_time_alarm_add(struct acpi_device *device) +{ + acpi_status status; + + if (!device) + return -EINVAL; + + acpi_tad_dev = device; + + /* evaluate _GCP */ + status = acpi_evaluate_integer(device->handle, "_GCP", NULL, &cap); + if (ACPI_FAILURE(status)) { + ACPI_EXCEPTION((AE_INFO, status, "Evaluating _GCP")); + return -ENODEV; + } + + if (!(cap & TAD_CAP_GETSETTIME)) + pr_warn(FW_INFO "Get/Set real time features not available.\n"); + + if (platform_device_register(&rtc_acpitad_dev) < 0) + pr_err("Unable to register rtc-acpitad device\n"); + + return 0; +} + +static struct acpi_driver acpi_time_alarm_driver = { + .name = "time_and_alarm", + .class = ACPI_TIME_ALARM_CLASS, + .ids = time_alarm_ids, + .ops = { + .add = acpi_time_alarm_add, + }, +}; + +int __init acpi_tad_init(void) +{ + int result = 0; + + result = acpi_bus_register_driver(&acpi_time_alarm_driver); + if (result < 0) + return -ENODEV; + + return result; +} diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index bba9b72..3f7a075 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -689,6 +689,9 @@ static int __init acpi_init(void) pci_mmcfg_late_init(); acpi_scan_init(); acpi_ec_init(); +#ifdef CONFIG_X86 + acpi_tad_init(); +#endif acpi_debugfs_init(); acpi_sleep_proc_init(); acpi_wakeup_device_init(); diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h index a29739c..9cfe589 100644 --- a/drivers/acpi/internal.h +++ b/drivers/acpi/internal.h @@ -134,6 +134,11 @@ void acpi_ec_block_transactions(void); void acpi_ec_unblock_transactions(void); void acpi_ec_unblock_transactions_early(void); +/* -------------------------------------------------------------------------- + Time and Alarm Device + -------------------------------------------------------------------------- */ +int acpi_tad_init(void); + /*-------------------------------------------------------------------------- Suspend/Resume -------------------------------------------------------------------------- */ diff --git a/include/linux/acpi.h b/include/linux/acpi.h index d9099b1..c8dc104 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -173,6 +173,37 @@ extern int ec_transaction(u8 command, u8 *rdata, unsigned rdata_len); extern acpi_handle ec_get_handle(void); +/* + * Time and Alarm device capability flags + */ +#define TAD_CAP_ACWAKE (1<<0) +#define TAD_CAP_DCWAKE (1<<1) +#define TAD_CAP_GETSETTIME (1<<2) +#define TAD_CAP_ACCURACY (1<<3) + +#define ACPI_TIME_AFFECTED_BY_DAYLIGHT (1<<0) +#define ACPI_TIME_ADJUSTED_FOR_DAYLIGHT (1<<1) +#define ACPI_ISDST (ACPI_TIME_AFFECTED_BY_DAYLIGHT|ACPI_TIME_ADJUSTED_FOR_DAYLIGHT) +#define ACPI_UNSPECIFIED_TIMEZONE 2047 + +struct acpi_time { + u16 year; + u8 month; + u8 day; + u8 hour; + u8 minute; + u8 second; + u8 pad1; + u16 milliseconds; + s16 timezone; + u8 daylight; + u8 pad2[3]; +}; + +extern int acpi_read_time(struct acpi_time *acpit); +extern int acpi_set_time(struct acpi_time *acpit); +extern int acpi_tad_get_capability(unsigned long *output); + #if defined(CONFIG_ACPI_WMI) || defined(CONFIG_ACPI_WMI_MODULE) typedef void (*wmi_notify_handler) (u32 value, void *context);