From patchwork Thu May 17 11:22:06 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: 8720 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 6497823E37 for ; Thu, 17 May 2012 11:22:40 +0000 (UTC) Received: from mail-yw0-f52.google.com (mail-yw0-f52.google.com [209.85.213.52]) by fiordland.canonical.com (Postfix) with ESMTP id 1EA02A1865C for ; Thu, 17 May 2012 11:22:40 +0000 (UTC) Received: by mail-yw0-f52.google.com with SMTP id p61so1968768yhp.11 for ; Thu, 17 May 2012 04:22:39 -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=t+PBAmFMGlkhsM4II3f/yKQgLnVlhgre206osEelZAg=; b=G5/wzbbxuS4TWAL1PhFvuarYpTVNp/KJf/Nps18BO0Nu/RZ4iwYEsY4nehik4oJu7+ uW7QuFfsk/ELASwb1nZhqaVe5BpixDB/zhkIChcT4V+hITy+DGZ3zef4DUOzzisJEDd/ tAkRePqNOsm/5VAXuwMOPSvO0p2sJXp3YMERnKWYHLV5baJUSBFC3HvQ6cWExjb/GkFf AI+p/3jPnYryPf8wf+dkJihSd2UoPVArG0HNuIUHURfT7E4Fbd5zH978TMtdgCP6YND8 B7MWUsF73CKIFXFPzCcrbpUILI92IdlZ2iRLR9lJ42FH4yYJo/rpLtg8GvSSX9OobPI8 9ybA== Received: by 10.50.87.227 with SMTP id bb3mr4769227igb.57.1337253759379; Thu, 17 May 2012 04:22:39 -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 o8csp21126ibd; Thu, 17 May 2012 04:22:38 -0700 (PDT) Received: by 10.68.227.41 with SMTP id rx9mr27272288pbc.32.1337253758494; Thu, 17 May 2012 04:22:38 -0700 (PDT) Received: from mail-pb0-f50.google.com (mail-pb0-f50.google.com [209.85.160.50]) by mx.google.com with ESMTPS id gt4si8243294pbc.56.2012.05.17.04.22.38 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 17 May 2012 04:22:38 -0700 (PDT) Received-SPF: neutral (google.com: 209.85.160.50 is neither permitted nor denied by best guess record for domain of girish.shivananjappa@linaro.org) client-ip=209.85.160.50; Authentication-Results: mx.google.com; spf=neutral (google.com: 209.85.160.50 is neither permitted nor denied by best guess record for domain of girish.shivananjappa@linaro.org) smtp.mail=girish.shivananjappa@linaro.org Received: by mail-pb0-f50.google.com with SMTP id rr4so2915780pbb.37 for ; Thu, 17 May 2012 04:22:38 -0700 (PDT) Received: by 10.68.190.131 with SMTP id gq3mr27091245pbc.17.1337253758193; Thu, 17 May 2012 04:22:38 -0700 (PDT) Received: from localhost.localdomain ([115.113.119.130]) by mx.google.com with ESMTPS id qr2sm8830148pbb.19.2012.05.17.04.22.32 (version=SSLv3 cipher=OTHER); Thu, 17 May 2012 04:22:35 -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, Girish K S Subject: [RFC V2 2/2] SCSI: UFS: Add platform support for ufs host controller Date: Thu, 17 May 2012 16:52:06 +0530 Message-Id: <1337253726-2666-3-git-send-email-girish.shivananjappa@linaro.org> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1337253726-2666-1-git-send-email-girish.shivananjappa@linaro.org> References: <1337253726-2666-1-git-send-email-girish.shivananjappa@linaro.org> X-Gm-Message-State: ALoCoQn88KyHroOno6rtO1hjdo3Y97VFtsldta+X9ZM2qri4tJ2g6k069NPRBTgS37nZBiU0jVC/ 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/ufshcd-pltfm.c | 191 +++++++++++++++++++++++++++++++++++++++ 2 files changed, 204 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/ufshcd-pltfm.c b/drivers/scsi/ufs/ufshcd-pltfm.c new file mode 100644 index 0000000..3bf6312 --- /dev/null +++ b/drivers/scsi/ufs/ufshcd-pltfm.c @@ -0,0 +1,191 @@ +/* + * 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 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_probe(&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_remove(hba); +err_iounmap: + iounmap(hba->mmio_base); + return err; +} + +static int __exit ufshcd_pltfm_remove(struct platform_device *pdev) +{ + struct ufs_hba *hba = platform_get_drvdata(pdev); + + ufshcd_remove(hba); + iounmap(hba->mmio_base); + platform_set_drvdata(pdev, NULL); + return 0; +} + +#ifdef CONFIG_PM_SLEEP +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_SLEEP */ + +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 = __exit_p(ufshcd_pltfm_remove), + .driver = { + .name = "ufshcd", + .pm = &ufshcd_pltfm_pmops, + }, +}; + +static int __init ufshcd_init(void) +{ + return platform_driver_register(&ufshcd_pltfm_driver); +} + +static void __exit ufshcd_exit(void) +{ + platform_driver_unregister(&ufshcd_pltfm_driver); +} + +module_init(ufshcd_init); +module_exit(ufshcd_exit); + +MODULE_DESCRIPTION("UFS Host Controller platform Interface driver"); +MODULE_AUTHOR("Girish K S "); +MODULE_LICENSE("GPL");