From patchwork Tue Oct 9 11:48:49 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vasanth Ananthan X-Patchwork-Id: 1569681 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork1.kernel.org (Postfix) with ESMTP id C4E7F40135 for ; Tue, 9 Oct 2012 11:49:09 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TLYHF-0000KS-3o; Tue, 09 Oct 2012 11:47:09 +0000 Received: from mail-pa0-f49.google.com ([209.85.220.49]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TLYGZ-0008Pd-Br for linux-arm-kernel@lists.infradead.org; Tue, 09 Oct 2012 11:46:28 +0000 Received: by mail-pa0-f49.google.com with SMTP id bi5so5395840pad.36 for ; Tue, 09 Oct 2012 04:46:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; bh=1O9ou+oIOLMcSMmovsxuvJ3Wzj4FmueJU1wCDIlvGoc=; b=iiMZMNesMTs3F7vTKfSnhFIYruIT6QYShYi65QoTLU0ZMm0RPBuHjjE0ZjqjFUIqbs w6QPh4V6t6Pk9EK+1QUI1nLGME8GcaEyPtbSLnp4jHpigRjoJK9GkIxcEaCljvUSAIds TWgkvUGi7HOVSR+CAmhaZXrIoUAYe0vW3NhfUvYLQJDtnGZy3KgWi7hwhGez1GP9X+Y4 Gy5O8lQqJdtP058mxV4G51VYnwI1INzNNtyZVrJzGvZ0J84xNykQpwKvfYFPXkm9HLpz x5LziRwDp10V+WHNnpsCeFd4VsRj4Cg2Xsit/ruiIv1NPt+N5OI9xfYWfCxyqZ5bBJSX +r+A== Received: by 10.66.81.199 with SMTP id c7mr51934265pay.19.1349783187092; Tue, 09 Oct 2012 04:46:27 -0700 (PDT) Received: from localhost.localdomain ([115.113.119.130]) by mx.google.com with ESMTPS id ka4sm12288231pbc.61.2012.10.09.04.46.23 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 09 Oct 2012 04:46:26 -0700 (PDT) From: Vasanth Ananthan To: kgene.kim@samsung.com, jgarzik@pobox.com, linux@arm.linux.org.uk Subject: [PATCH 3/6] DRIVERS: ATA: SATA PHY utility framework Date: Tue, 9 Oct 2012 17:18:49 +0530 Message-Id: <1349783332-18467-4-git-send-email-vasanthananthan@gmail.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1349783332-18467-1-git-send-email-vasanthananthan@gmail.com> References: <1349783332-18467-1-git-send-email-vasanthananthan@gmail.com> X-Spam-Note: CRM114 invocation failed X-Spam-Score: -2.7 (--) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-2.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [209.85.220.49 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (vasanthananthan[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature Cc: linux-samsung-soc@vger.kernel.org, Vasanth Ananthan , linux-ide@vger.kernel.org, thomas.abraham@linaro.org, Vasanth Ananthan , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org This patch adds SATA PHY utility framework APIs. The framework acts as an interface between the SATA device and the PHY device. The SATA PHY device registers itself with the framework through the APIs provided and the SATA device finds and requests for an appropriate PHY device. Signed-off-by: Vasanth Ananthan --- drivers/ata/Kconfig | 9 ++++ drivers/ata/Makefile | 1 + drivers/ata/sata_phy.c | 99 ++++++++++++++++++++++++++++++++++++++++++++++++ drivers/ata/sata_phy.h | 44 +++++++++++++++++++++ 4 files changed, 153 insertions(+), 0 deletions(-) create mode 100644 drivers/ata/sata_phy.c create mode 100644 drivers/ata/sata_phy.h diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig index 27cecd3..0344b78 100644 --- a/drivers/ata/Kconfig +++ b/drivers/ata/Kconfig @@ -83,6 +83,15 @@ config SATA_AHCI_PLATFORM If unsure, say N. +config SATA_EXYNOS + bool "Exynos SATA AHCI support" + depends on I2C_S3C2410 + help + This option enables support for Exynos AHCI Serial ATA + controllers. + + If unsure, say N. + config SATA_FSL tristate "Freescale 3.0Gbps SATA support" depends on FSL_SOC diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile index a454a13..bf3fd91 100644 --- a/drivers/ata/Makefile +++ b/drivers/ata/Makefile @@ -9,6 +9,7 @@ obj-$(CONFIG_SATA_FSL) += sata_fsl.o obj-$(CONFIG_SATA_INIC162X) += sata_inic162x.o obj-$(CONFIG_SATA_SIL24) += sata_sil24.o obj-$(CONFIG_SATA_DWC) += sata_dwc_460ex.o +obj-$(CONFIG_SATA_EXYNOS) += sata_phy.o libahci.o # SFF w/ custom DMA obj-$(CONFIG_PDC_ADMA) += pdc_adma.o diff --git a/drivers/ata/sata_phy.c b/drivers/ata/sata_phy.c new file mode 100644 index 0000000..dbb4aa3 --- /dev/null +++ b/drivers/ata/sata_phy.c @@ -0,0 +1,99 @@ +/* + * Copyright (c) 2010-2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * EXYNOS - SATA utility framework. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include +#include +#include +#include +#include +#include +#include "sata_phy.h" + +static LIST_HEAD(phy_list); +static DEFINE_SPINLOCK(phy_lock); + +struct sata_phy *sata_get_phy(enum sata_phy_type type) +{ + struct sata_phy *x = NULL; + unsigned long flag; + + spin_lock_irqsave(&phy_lock, flag); + + list_for_each_entry(x, &phy_list, head) { + if (x->type == type) { + get_device(x->dev); + break; + } + } + + spin_unlock_irqrestore(&phy_lock, flag); + return x; +} +EXPORT_SYMBOL(sata_get_phy); + +int sata_add_phy(struct sata_phy *phy, enum sata_phy_type type) +{ + unsigned long flag; + unsigned int ret = -EINVAL; + struct sata_phy *x; + + spin_lock_irqsave(&phy_lock, flag); + + if (phy) { + + list_for_each_entry(x, &phy_list, head) { + if (x->type == type) { + dev_err(phy->dev, "transceiver type already exists\n"); + goto out; + } + } + phy->type = type; + list_add_tail(&phy->head, &phy_list); + ret = 0; + } + + out: + spin_unlock_irqrestore(&phy_lock, flag); + return ret; +} +EXPORT_SYMBOL(sata_add_phy); + +void sata_remove_phy(struct sata_phy *phy) +{ + unsigned long flag; + struct sata_phy *x; + + spin_lock_irqsave(&phy_lock, flag); + + if (phy) { + list_for_each_entry(x, &phy_list, head) { + if (x->type == phy->type) + list_del(&phy->head); + } + } + + spin_unlock_irqrestore(&phy_lock, flag); +} +EXPORT_SYMBOL(sata_remove_phy); + +void sata_put_phy(struct sata_phy *phy) +{ + unsigned long flag; + + spin_lock_irqsave(&phy_lock, flag); + + if (phy) + put_device(phy->dev); + + spin_unlock_irqrestore(&phy_lock, flag); + +} +EXPORT_SYMBOL(sata_put_phy); diff --git a/drivers/ata/sata_phy.h b/drivers/ata/sata_phy.h new file mode 100644 index 0000000..dc38683 --- /dev/null +++ b/drivers/ata/sata_phy.h @@ -0,0 +1,44 @@ +/* + * Copyright (c) 2010-2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * EXYNOS - SATA utility framework definitions. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +enum sata_phy_type { + SATA_PHY_GENERATION1, + SATA_PHY_GENERATION2, + SATA_PHY_GENERATION3, +}; + +struct sata_phy { + int (*init) (struct sata_phy *); + int (*shutdown) (struct sata_phy *); + struct device *dev; + void *priv_data; + enum sata_phy_type type; + struct list_head head; +}; + +static inline int sata_init_phy(struct sata_phy *x) +{ + if (x && x->init) + return x->init(x); + + return -EINVAL; +} + +static inline void sata_shutdown_phy(struct sata_phy *x) +{ + if (x && x->shutdown) + x->shutdown(x); +} + +struct sata_phy *sata_get_phy(enum sata_phy_type); +int sata_add_phy(struct sata_phy *, enum sata_phy_type); +void sata_remove_phy(struct sata_phy *); +void sata_put_phy(struct sata_phy *);