From patchwork Mon May 21 06:31:08 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Girish K S X-Patchwork-Id: 8836 Return-Path: X-Original-To: patchwork@peony.canonical.com Delivered-To: patchwork@peony.canonical.com Received: from fiordland.canonical.com (fiordland.canonical.com [91.189.94.145]) by peony.canonical.com (Postfix) with ESMTP id E64B023EAB for ; Mon, 21 May 2012 06:31:33 +0000 (UTC) Received: from mail-yx0-f180.google.com (mail-yx0-f180.google.com [209.85.213.180]) by fiordland.canonical.com (Postfix) with ESMTP id 9756BA182F6 for ; Mon, 21 May 2012 06:31:33 +0000 (UTC) Received: by yenq6 with SMTP id q6so4926682yen.11 for ; Sun, 20 May 2012 23:31:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-forwarded-to:x-forwarded-for:delivered-to:received-spf:from:to:cc :subject:date:message-id:x-mailer:in-reply-to:references :x-gm-message-state; bh=pzRYSVddDpTiuNBdJczgvlXrRr+nwkYwzUDFIz8nPq8=; b=Bm3nVDKtI1jYGWSs6triqUbRlH4I1/p8LNksAeITp6GGqIAPzxsLDSf86vLOC7Flco YX0rzCbGuxveas42dID6aMD6uucqKhnv0/gMXXr9GrZhwoYuvevhSjVQjBKF5p/PijIR tZGm2DQ2V8zHLS+4wVCVH1yLCmliD/TLCziP/8G6qmVeLTK2K2q6jDD2weji7MU9fS11 DQEer0U6ba6wLMkh8dSRoSXB50/Wwn440wKg3qcqj2hdyRNny+gxPEY499zbRb93hr2Q Szm4lQmg54rIK/X4NeU3YbZ8iijPz1kZah39WCkaGY1AYlXy9lWs6S5DsNkYecD9FzeP wygQ== Received: by 10.42.56.80 with SMTP id y16mr2354482icg.48.1337581892827; Sun, 20 May 2012 23:31:32 -0700 (PDT) X-Forwarded-To: linaro-patchwork@canonical.com X-Forwarded-For: patch@linaro.org linaro-patchwork@canonical.com Delivered-To: patches@linaro.org Received: by 10.231.35.72 with SMTP id o8csp266292ibd; Sun, 20 May 2012 23:31:32 -0700 (PDT) Received: by 10.68.223.129 with SMTP id qu1mr19248367pbc.165.1337581892069; Sun, 20 May 2012 23:31:32 -0700 (PDT) Received: from mail-pz0-f50.google.com (mail-pz0-f50.google.com [209.85.210.50]) by mx.google.com with ESMTPS id pi5si18175495pbb.157.2012.05.20.23.31.31 (version=TLSv1/SSLv3 cipher=OTHER); Sun, 20 May 2012 23:31:32 -0700 (PDT) Received-SPF: neutral (google.com: 209.85.210.50 is neither permitted nor denied by best guess record for domain of girish.shivananjappa@linaro.org) client-ip=209.85.210.50; Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.210.50 is neither permitted nor denied by best guess record for domain of girish.shivananjappa@linaro.org) smtp.mail=girish.shivananjappa@linaro.org Received: by danh15 with SMTP id h15so7621608dan.37 for ; Sun, 20 May 2012 23:31:31 -0700 (PDT) Received: by 10.68.228.106 with SMTP id sh10mr56280081pbc.107.1337581891781; Sun, 20 May 2012 23:31:31 -0700 (PDT) Received: from localhost.localdomain ([115.113.119.130]) by mx.google.com with ESMTPS id u5sm22041477pbu.76.2012.05.20.23.31.28 (version=SSLv3 cipher=OTHER); Sun, 20 May 2012 23:31:31 -0700 (PDT) From: Girish K S To: linux-scsi@vger.kernel.org Cc: james.bottomley@hansenpartnership.com, vinholikatti@gmail.com, santoshsy@gmail.com, hch@infradead.org, patches@linaro.org, svenkatr@ti.com, Girish K S Subject: [RFC V3 2/2] SCSI: UFS: Add platform support for ufs host controller Date: Mon, 21 May 2012 12:01:08 +0530 Message-Id: <1337581868-3042-3-git-send-email-girish.shivananjappa@linaro.org> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1337581868-3042-1-git-send-email-girish.shivananjappa@linaro.org> References: <1337581868-3042-1-git-send-email-girish.shivananjappa@linaro.org> X-Gm-Message-State: ALoCoQm/AhvnCvpB4My8TNa4t6rt1Xq86PvsWLLVqOpsvGjEmrcpBj10teMRCrdxNT6VFkQn4CGf This patch adds platform support for ufs host controller The SoC's that use non-pci probing should use this option. Signed-off-by: Girish K S --- drivers/scsi/ufs/Kconfig | 13 +++ drivers/scsi/ufs/Makefile | 1 + drivers/scsi/ufs/ufshcd-pltfm.c | 180 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 194 insertions(+), 0 deletions(-) create mode 100644 drivers/scsi/ufs/ufshcd-pltfm.c diff --git a/drivers/scsi/ufs/Kconfig b/drivers/scsi/ufs/Kconfig index 2a70972..dae5428 100644 --- a/drivers/scsi/ufs/Kconfig +++ b/drivers/scsi/ufs/Kconfig @@ -60,3 +60,16 @@ config SCSI_UFSHCD_PCI If you have a controller with this interface, say Y or M here. If unsure, say N. + +config SCSI_UFSHCD_PLTFM + tristate "Universal Flash Storage host support as platform device" + depends on SCSI_UFSHCD + help + This selects the common helper functions support for Host Controller + Interface based platform driver. Please select this option if the IP + is present as a platform device. This is the common interface for the + UFS Host Controller IP. + + If you have a controller with this interface, say Y or M here. + + If unsure, say N. diff --git a/drivers/scsi/ufs/Makefile b/drivers/scsi/ufs/Makefile index 9eda0df..fc56471 100644 --- a/drivers/scsi/ufs/Makefile +++ b/drivers/scsi/ufs/Makefile @@ -1,3 +1,4 @@ # UFSHCD makefile obj-$(CONFIG_SCSI_UFSHCD) += ufshcd.o obj-$(CONFIG_SCSI_UFSHCD_PCI) += ufshcd-pci.o +obj-$(CONFIG_SCSI_UFSHCD_PLTFM) += ufshcd-pltfm.o diff --git a/drivers/scsi/ufs/ufshcd-pltfm.c b/drivers/scsi/ufs/ufshcd-pltfm.c new file mode 100644 index 0000000..7558210 --- /dev/null +++ b/drivers/scsi/ufs/ufshcd-pltfm.c @@ -0,0 +1,180 @@ +/* + * Universal Flash Storage Host controller driver + * + * This code is based on drivers/scsi/ufs/ufshcd.c + * Copyright (C) 2011-2012 Samsung India Software Operations + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * NO WARRANTY + * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR + * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT + * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is + * solely responsible for determining the appropriateness of using and + * distributing the Program and assumes all risks associated with its + * exercise of rights under this Agreement, including but not limited to + * the risks and costs of program errors, damage to or loss of data, + * programs or equipment, and unavailability or interruption of operations. + + * DISCLAIMER OF LIABILITY + * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), 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 OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED + * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES + + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, + * USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "ufs.h" +#include "ufshci.h" + +/** + * ufshcd_pltfmset_dma_mask - Set dma mask based on the controller + * addressing capability + * @ihba: pointer to host platform data + * + * Returns 0 for success, non-zero for failure + */ +static int ufshcd_pltfm_set_dma_mask(struct platform_device *pdev) +{ + int err; + u64 dma_mask; + + dma_mask = DMA_BIT_MASK(64); + err = dma_set_coherent_mask(&pdev->dev, dma_mask); + if (err) { + dma_mask = DMA_BIT_MASK(32); + err = dma_set_coherent_mask(&pdev->dev, dma_mask); + } + + return err; +} + +static int __devinit ufshcd_pltfm_probe(struct platform_device *pdev) +{ + struct ufs_hba *uninitialized_var(hba); + struct resource *regs; + int err, irq; + void __iomem *mmio_base; + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!regs) + return -ENXIO; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + mmio_base = ioremap(regs->start, resource_size(regs)); + if (!mmio_base) + return -ENOMEM; + + err = ufshcd_pltfm_set_dma_mask(pdev); + if (err) { + dev_err(&pdev->dev, "set dma mask failed\n"); + goto err_iounmap; + } + + err = ufshcd_drv_init(&hba, &pdev->dev, irq, mmio_base); + if (err) + goto err_iounmap; + + platform_set_drvdata(pdev, hba); + + /* Initialization routine */ + err = ufshcd_initialize_hba(hba); + if (err) { + dev_err(&hba->dev, "Initialization failed\n"); + goto err_remove; + } + + return err; + +err_remove: + ufshcd_drv_exit(hba); +err_iounmap: + iounmap(hba->mmio_base); + return err; +} + +static int __devexit ufshcd_pltfm_remove(struct platform_device *pdev) +{ + struct ufs_hba *hba = platform_get_drvdata(pdev); + + ufshcd_drv_exit(hba); + iounmap(hba->mmio_base); + platform_set_drvdata(pdev, NULL); + return 0; +} + +#ifdef CONFIG_PM +static int ufshcd_pltfm_suspend(struct device *dev) +{ + int ret; + struct ufs_hba *hba = dev_get_drvdata(dev); + + ret = ufshcd_suspend(hba); + if (ret) + return ret; + + return 0; +} + +static int ufshcd_pltfm_resume(struct device *dev) +{ + int ret; + struct ufs_hba *hba = dev_get_drvdata(dev); + + ret = ufshcd_resume(hba); + if (ret) + return ret; + + return 0; +} +#else +#define ufshcd_pltfm_suspend NULL +#define ufshcd_pltfm_resume NULL +#endif /* CONFIG_PM */ + +static SIMPLE_DEV_PM_OPS(ufshcd_pltfm_pmops, + ufshcd_pltfm_suspend, + ufshcd_pltfm_resume); + +static struct platform_driver ufshcd_pltfm_driver = { + .probe = ufshcd_pltfm_probe, + .remove = __devexit_p(ufshcd_pltfm_remove), + .driver = { + .name = "ufshcd-pltfm", + .pm = &ufshcd_pltfm_pmops, + }, +}; + +module_platform_driver(ufshcd_pltfm_driver); + +MODULE_DESCRIPTION("UFS Host Controller platform Interface driver"); +MODULE_AUTHOR("Girish K S "); +MODULE_LICENSE("GPL");