Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751448AbdFFJO6 (ORCPT ); Tue, 6 Jun 2017 05:14:58 -0400 Received: from mga09.intel.com ([134.134.136.24]:1722 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751243AbdFFJO5 (ORCPT ); Tue, 6 Jun 2017 05:14:57 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.39,305,1493708400"; d="scan'208";a="96070140" From: Adrian Hunter To: Vinayak Holikatti , "Martin K. Petersen" , Christoph Hellwig , "James E.J. Bottomley" Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Szymon Mielczarek , Michal Potomski , Grzegorz Janca Subject: [PATCH V3 2/2] scsi: ufshcd-intel-pci: Add PCI driver for Intel Host controllers Date: Tue, 6 Jun 2017 12:08:56 +0300 Message-Id: <1496740136-4024-1-git-send-email-adrian.hunter@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <20170606070757.GA1748@infradead.org> References: <20170606070757.GA1748@infradead.org> Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6301 Lines: 237 From: Szymon Mielczarek This patch adds a glue pci driver for Intel UFS Host controllers. Signed-off-by: Szymon Mielczarek Signed-off-by: Adrian Hunter --- Changes in V3: Remove UFSHCI class code and match on PCI device ID Changes in V2: Change variant name from intel to intel-pci drivers/scsi/ufs/Kconfig | 11 +++ drivers/scsi/ufs/Makefile | 1 + drivers/scsi/ufs/ufshcd-intel-pci.c | 174 ++++++++++++++++++++++++++++++++++++ 3 files changed, 186 insertions(+) create mode 100644 drivers/scsi/ufs/ufshcd-intel-pci.c diff --git a/drivers/scsi/ufs/Kconfig b/drivers/scsi/ufs/Kconfig index e27b4d4e6ae2..702420bc0fac 100644 --- a/drivers/scsi/ufs/Kconfig +++ b/drivers/scsi/ufs/Kconfig @@ -69,6 +69,17 @@ config SCSI_UFS_DWC_TC_PCI If unsure, say N. +config SCSI_UFSHCD_INTEL_PCI + tristate "Intel PCI bus based UFS Controller support" + depends on SCSI_UFSHCD && PCI + ---help--- + This selects the Intel PCI UFS Host Controller Interface. Select this if + you have Intel UFS Host Controller with PCI Interface. + + If you have a controller with this interface, say Y or M here. + + If unsure, say N. + config SCSI_UFSHCD_PLATFORM tristate "Platform bus based UFS Controller support" depends on SCSI_UFSHCD diff --git a/drivers/scsi/ufs/Makefile b/drivers/scsi/ufs/Makefile index 6e77cb0bfee9..be817e1a6666 100644 --- a/drivers/scsi/ufs/Makefile +++ b/drivers/scsi/ufs/Makefile @@ -4,4 +4,5 @@ obj-$(CONFIG_SCSI_UFS_DWC_TC_PLATFORM) += tc-dwc-g210-pltfrm.o ufshcd-dwc.o tc-d obj-$(CONFIG_SCSI_UFS_QCOM) += ufs-qcom.o obj-$(CONFIG_SCSI_UFSHCD) += ufshcd.o obj-$(CONFIG_SCSI_UFSHCD_PCI) += ufshcd-pci.o +obj-$(CONFIG_SCSI_UFSHCD_INTEL_PCI) += ufshcd-intel-pci.o obj-$(CONFIG_SCSI_UFSHCD_PLATFORM) += ufshcd-pltfrm.o diff --git a/drivers/scsi/ufs/ufshcd-intel-pci.c b/drivers/scsi/ufs/ufshcd-intel-pci.c new file mode 100644 index 000000000000..4112bba666b4 --- /dev/null +++ b/drivers/scsi/ufs/ufshcd-intel-pci.c @@ -0,0 +1,174 @@ +/* + * Universal Flash Storage Intel Host controller PCI driver + * + * Copyright (c) 2017, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + */ + +#include "ufshcd.h" +#include +#include + +#define PCI_DEVICE_ID_INTEL_UFS_CNL 0x9dfa + +static int ufs_intel_disable_lcc(struct ufs_hba *hba) +{ + u32 attr = UIC_ARG_MIB(PA_LOCAL_TX_LCC_ENABLE); + u32 lcc_enable = 0; + + ufshcd_dme_get(hba, attr, &lcc_enable); + if (lcc_enable) + ufshcd_dme_set(hba, attr, 0); + + return 0; +} + +static int ufs_intel_link_startup_notify(struct ufs_hba *hba, + enum ufs_notify_change_status status) +{ + int err = 0; + + switch (status) { + case PRE_CHANGE: + err = ufs_intel_disable_lcc(hba); + break; + case POST_CHANGE: + break; + default: + break; + } + + return err; +} + +static struct ufs_hba_variant_ops ufs_intel_hba_vops = { + .name = "intel-pci", + .link_startup_notify = ufs_intel_link_startup_notify, +}; + +#ifdef CONFIG_PM_SLEEP +static int ufs_intel_suspend(struct device *dev) +{ + return ufshcd_system_suspend(dev_get_drvdata(dev)); +} + +static int ufs_intel_resume(struct device *dev) +{ + return ufshcd_system_resume(dev_get_drvdata(dev)); +} +#endif /* !CONFIG_PM_SLEEP */ + +#ifdef CONFIG_PM +static int ufs_intel_runtime_suspend(struct device *dev) +{ + return ufshcd_runtime_suspend(dev_get_drvdata(dev)); +} + +static int ufs_intel_runtime_resume(struct device *dev) +{ + return ufshcd_runtime_resume(dev_get_drvdata(dev)); +} + +static int ufs_intel_runtime_idle(struct device *dev) +{ + return ufshcd_runtime_idle(dev_get_drvdata(dev)); +} +#endif /* !CONFIG_PM */ + +static void ufs_intel_shutdown(struct pci_dev *pdev) +{ + ufshcd_shutdown((struct ufs_hba *)pci_get_drvdata(pdev)); +} + +static void ufs_intel_remove(struct pci_dev *pdev) +{ + struct ufs_hba *hba = pci_get_drvdata(pdev); + + pm_runtime_forbid(&pdev->dev); + pm_runtime_get_noresume(&pdev->dev); + ufshcd_remove(hba); + ufshcd_dealloc_host(hba); +} + +static int ufs_intel_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct ufs_hba *hba; + void __iomem *mmio_base; + int err; + + dev_info(&pdev->dev, "UFS controller found [%04x:%04x]\n", + (int)pdev->vendor, (int)pdev->device); + + err = pcim_enable_device(pdev); + if (err) + return err; + + pci_set_master(pdev); + + err = pcim_iomap_regions(pdev, 1 << 0, UFSHCD); + if (err < 0) + return err; + + mmio_base = pcim_iomap_table(pdev)[0]; + + err = ufshcd_alloc_host(&pdev->dev, &hba); + if (err) + return err; + + hba->vops = &ufs_intel_hba_vops; + + err = ufshcd_init(hba, mmio_base, pdev->irq); + if (err) { + dev_err(&pdev->dev, "Initialization failed\n"); + goto out_dealloc; + } + + pci_set_drvdata(pdev, hba); + pm_runtime_put_noidle(&pdev->dev); + pm_runtime_allow(&pdev->dev); + + return 0; + +out_dealloc: + ufshcd_dealloc_host(hba); + return err; +} + +static const struct dev_pm_ops ufs_intel_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(ufs_intel_suspend, + ufs_intel_resume) + SET_RUNTIME_PM_OPS(ufs_intel_runtime_suspend, + ufs_intel_runtime_resume, + ufs_intel_runtime_idle) +}; + +static const struct pci_device_id ufs_intel_tbl[] = { + {PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_UFS_CNL)}, + { } /* terminate list */ +}; +MODULE_DEVICE_TABLE(pci, ufs_intel_tbl); + +static struct pci_driver ufs_intel_driver = { + .name = "ufshcd-intel-pci", + .id_table = ufs_intel_tbl, + .probe = ufs_intel_probe, + .remove = ufs_intel_remove, + .shutdown = ufs_intel_shutdown, + .driver = { + .pm = &ufs_intel_pm_ops + }, +}; + +module_pci_driver(ufs_intel_driver); + +MODULE_AUTHOR("Szymon Mielczarek "); +MODULE_DESCRIPTION("Intel UFS host controller PCI glue driver"); +MODULE_LICENSE("GPL v2"); -- 1.9.1