From patchwork Mon May 14 11:08:30 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: 8588 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 A55AF23E37 for ; Mon, 14 May 2012 11:09:04 +0000 (UTC) Received: from mail-gg0-f180.google.com (mail-gg0-f180.google.com [209.85.161.180]) by fiordland.canonical.com (Postfix) with ESMTP id 5858AA1851D for ; Mon, 14 May 2012 11:09:04 +0000 (UTC) Received: by ggnf1 with SMTP id f1so3182557ggn.11 for ; Mon, 14 May 2012 04:09:03 -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=gDY4s5qFWvyUMUQk5yZh5NHe5SKEKiZWpiHPyU0breM=; b=WcR+20n0LqjBT1BHRn31YXqXJ6tzT0mRq3uanSIrHR0bYfwY7Eq7j5NPxr69fwNBdt k/xDZzH5N+A3bXOStinG/v6zxCxJtEbqX8sH8AeohY1dNrJpmB1v0A6sgNOMp7kfxh4w 511aplCpwcOOlRDdbKhq7k80Qq80wGC91y5+dafWmZN2h7S3cg5vlNrX/mBh9RmCRJF3 ajyJ4Bnmx31vCHKNhVmsTtS9gf43muAZquQg0PlsiwbYJllg1h77K/vXIY+DqHVCp7MH HobFQo6fVkpyOExzGw1J4lPUC8QGZ+93kPnk3XZi/huxP6+DwAYjZ5emAAMItm0Jxnfc bLig== Received: by 10.42.119.129 with SMTP id b1mr3411250icr.48.1336993743482; Mon, 14 May 2012 04:09:03 -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 o8csp334887ibd; Mon, 14 May 2012 04:09:02 -0700 (PDT) Received: by 10.68.196.138 with SMTP id im10mr1639258pbc.47.1336993742509; Mon, 14 May 2012 04:09:02 -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 d1si23773175pbq.323.2012.05.14.04.09.02 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 14 May 2012 04:09:02 -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 mail-pz0-f50.google.com with SMTP id h15so7180378dan.37 for ; Mon, 14 May 2012 04:09:02 -0700 (PDT) Received: by 10.68.217.38 with SMTP id ov6mr21808259pbc.25.1336993742187; Mon, 14 May 2012 04:09:02 -0700 (PDT) Received: from localhost.localdomain ([115.113.119.130]) by mx.google.com with ESMTPS id d6sm21976811pbi.23.2012.05.14.04.08.55 (version=SSLv3 cipher=OTHER); Mon, 14 May 2012 04:09:01 -0700 (PDT) From: Girish K S To: linux-scsi@vger.kernel.org Cc: james.bottomley@hansenpartnership.com, vinholikatti@gmail.com, santoshsy@gmail.com, patches@linaro.org, Girish K S Subject: [RFC PATCH 2/4] SCSI: UFS: Add support for pci probe Date: Mon, 14 May 2012 16:38:30 +0530 Message-Id: <1336993712-9111-3-git-send-email-girish.shivananjappa@linaro.org> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1336993712-9111-1-git-send-email-girish.shivananjappa@linaro.org> References: <1336993712-9111-1-git-send-email-girish.shivananjappa@linaro.org> X-Gm-Message-State: ALoCoQmE7aWdmbuiD9MHuK9/wOE9OHK52XUvWlQf7FMq0y4fROMArkk4Zcvw17AI59O+XLlaXIh0 This patch adds support for pci probing of UFS driver Signed-off-by: Girish K S --- drivers/scsi/ufs/ufshcd-pci.c | 217 +++++++++++++++++++++++++++++++++++++++++ 1 files changed, 217 insertions(+), 0 deletions(-) create mode 100644 drivers/scsi/ufs/ufshcd-pci.c diff --git a/drivers/scsi/ufs/ufshcd-pci.c b/drivers/scsi/ufs/ufshcd-pci.c new file mode 100644 index 0000000..eabdaa6 --- /dev/null +++ b/drivers/scsi/ufs/ufshcd-pci.c @@ -0,0 +1,217 @@ +/* + * 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 "ufs.h" +#include "ufshci.h" + +/** + * ufshcd_pci_set_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_pci_set_dma_mask(struct pci_dev *pdev) +{ + int err; + u64 dma_mask; + + /* + * If controller supports 64 bit addressing mode, then set the DMA + * mask to 64-bit, else set the DMA mask to 32-bit + */ + dma_mask = DMA_BIT_MASK(64); + err = pci_set_dma_mask(pdev, dma_mask); + if (err) { + dma_mask = DMA_BIT_MASK(32); + err = pci_set_dma_mask(pdev, dma_mask); + } + + if (err) + return err; + + err = pci_set_consistent_dma_mask(pdev, dma_mask); + + return err; +} + +static int __devinit ufshcd_pci_probe(struct pci_dev *pdev, + const struct pci_device_id *entries) +{ + struct ufs_hba *uninitialized_var(hba); + int err; + void __iomem *mmio_base; + + err = pci_enable_device(pdev); + if (err) { + dev_err(&pdev->dev, "pci_enable_device failed\n"); + goto err_return; + } + + pci_set_master(pdev); + + err = pci_request_regions(pdev, "ufshcd_pci"); + if (err < 0) { + dev_err(&pdev->dev, "request regions failed\n"); + goto err_disable; + } + + mmio_base = pci_ioremap_bar(pdev, 0); + if (!mmio_base) { + dev_err(&pdev->dev, "memory map failed\n"); + err = -ENOMEM; + goto err_release; + } + + err = ufshcd_pci_set_dma_mask(pdev); + if (err) { + dev_err(&pdev->dev, "set dma mask failed\n"); + goto err_iounmap; + } + + err = ufshcd_probe(&hba, &pdev->dev, pdev->irq, mmio_base); + if (err) + goto err_iounmap; + + pci_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); +err_release: + pci_release_regions(pdev); +err_disable: + pci_clear_master(pdev); + pci_disable_device(pdev); +err_return: + return err; +} + +static void __devexit ufshcd_pci_remove(struct pci_dev *pdev) +{ + struct ufs_hba *hba = pci_get_drvdata(pdev); + + ufshcd_remove(hba); + iounmap(hba->mmio_base); + pci_set_drvdata(pdev, NULL); + pci_clear_master(pdev); + pci_release_regions(pdev); + pci_disable_device(pdev); +} + +#ifdef CONFIG_PM_SLEEP +static int ufshcd_pci_suspend(struct device *dev) +{ + int ret; + struct pci_dev *pdev = to_pci_dev(dev); + struct ufs_hba *hba = pci_get_drvdata(pdev); + + ret = ufshcd_suspend(hba); + return ret; +} + +static int ufshcd_pci_resume(struct device *dev) +{ + int ret; + struct pci_dev *pdev = to_pci_dev(dev); + struct ufs_hba *hba = pci_get_drvdata(pdev); + + ret = ufshcd_resume(hba); + return ret; +} +#else +#define ufshcd_pci_suspend NULL +#define ufshcd_pci_resume NULL +#endif /* CONFIG_PM_SLEEP */ + +static SIMPLE_DEV_PM_OPS(ufshcd_pci_pmops, + ufshcd_pci_suspend, + ufshcd_pci_resume); + +static DEFINE_PCI_DEVICE_TABLE(ufshcd_pci_id) = { + { PCI_VENDOR_ID_SAMSUNG, 0xC00C, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, + {} +}; +MODULE_DEVICE_TABLE(pci, ufshcd_pci_id); + +static struct pci_driver ufshcd_pci_driver = { + .name = "ufshcd_pci", + .id_table = ufshcd_pci_id, + .probe = ufshcd_pci_probe, + .remove = ufshcd_pci_remove, + .driver = { + .pm = &ufshcd_pci_pmops + }, +}; + +static int __init ufshcd_init(void) +{ + return pci_register_driver(&ufshcd_pci_driver); +} + +static void __exit ufshcd_exit(void) +{ + pci_unregister_driver(&ufshcd_pci_driver); +} + +module_init(ufshcd_init); +module_exit(ufshcd_exit); + +MODULE_DESCRIPTION("UFS Host Controller PCI Interface driver"); +MODULE_AUTHOR("Girish K S "); +MODULE_LICENSE("GPL");