/* * Universal Flash Storage Host controller PCI glue driver * * This code is based on drivers/scsi/ufs/ufshcd-pci.c * Copyright (C) 2011-2013 Samsung India Software Operations * * Authors: * Santosh Yaraganavi * Vinayak Holikatti * * 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. * See the COPYING file in the top-level directory or visit * * * 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. * * This program is provided "AS IS" and "WITH ALL FAULTS" and * without warranty of any kind. You are solely responsible for * determining the appropriateness of using and distributing * the program and assume all risks associated with your exercise * of rights with respect to the program, including but not limited * to infringement of third party rights, the risks and costs of * program errors, damage to or loss of data, programs or equipment, * and unavailability or interruption of operations. Under no * circumstances will the contributor of this Program be liable for * any damages of any kind arising from your use or distribution of * this program. */ #include "ufshcd.h" #include #include 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_cnl_hba_vops = { .name = "intel-pci", .link_startup_notify = ufs_intel_link_startup_notify, }; #ifdef CONFIG_PM_SLEEP /** * ufshcd_pci_suspend - suspend power management function * @pdev: pointer to PCI device handle * @state: power state * * Returns 0 if successful * Returns non-zero otherwise */ static int ufshcd_pci_suspend(struct device *dev) { return ufshcd_system_suspend(dev_get_drvdata(dev)); } /** * ufshcd_pci_resume - resume power management function * @pdev: pointer to PCI device handle * * Returns 0 if successful * Returns non-zero otherwise */ static int ufshcd_pci_resume(struct device *dev) { return ufshcd_system_resume(dev_get_drvdata(dev)); } #endif /* !CONFIG_PM_SLEEP */ #ifdef CONFIG_PM static int ufshcd_pci_runtime_suspend(struct device *dev) { return ufshcd_runtime_suspend(dev_get_drvdata(dev)); } static int ufshcd_pci_runtime_resume(struct device *dev) { return ufshcd_runtime_resume(dev_get_drvdata(dev)); } static int ufshcd_pci_runtime_idle(struct device *dev) { return ufshcd_runtime_idle(dev_get_drvdata(dev)); } #endif /* !CONFIG_PM */ /** * ufshcd_pci_shutdown - main function to put the controller in reset state * @pdev: pointer to PCI device handle */ static void ufshcd_pci_shutdown(struct pci_dev *pdev) { ufshcd_shutdown((struct ufs_hba *)pci_get_drvdata(pdev)); } /** * ufshcd_pci_remove - de-allocate PCI/SCSI host and host memory space * data structure memory * @pdev - pointer to PCI handle */ static void ufshcd_pci_remove(struct pci_dev *pdev) { struct ufs_hba *hba = pci_get_drvdata(pdev); pm_runtime_forbid(&pdev->dev); pm_runtime_get_noresume(&pdev->dev); disable_irq(pdev->irq); ufshcd_remove(hba); pci_set_drvdata(pdev, NULL); ufshcd_dealloc_host(hba); } /** * ufshcd_pci_probe - probe routine of the driver * @pdev: pointer to PCI device handle * @id: PCI device id * * Returns 0 on success, non-zero value on failure */ static int ufshcd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) { struct ufs_hba *hba; void __iomem *mmio_base; int err; err = pcim_enable_device(pdev); if (err) { dev_err(&pdev->dev, "pcim_enable_device failed\n"); return err; } pci_set_master(pdev); err = pcim_iomap_regions(pdev, 1 << 0, UFSHCD); if (err < 0) { dev_err(&pdev->dev, "request and iomap failed\n"); return err; } mmio_base = pcim_iomap_table(pdev)[0]; err = ufshcd_alloc_host(&pdev->dev, &hba); if (err) { dev_err(&pdev->dev, "Allocation failed\n"); return err; } hba->vops = (struct ufs_hba_variant_ops *)id->driver_data; err = ufshcd_init(hba, mmio_base, pdev->irq); if (err) { dev_err(&pdev->dev, "Initialization failed\n"); ufshcd_dealloc_host(hba); return err; } pci_set_drvdata(pdev, hba); pm_runtime_put_noidle(&pdev->dev); pm_runtime_allow(&pdev->dev); return 0; } static const struct dev_pm_ops ufshcd_pci_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(ufshcd_pci_suspend, ufshcd_pci_resume) SET_RUNTIME_PM_OPS(ufshcd_pci_runtime_suspend, ufshcd_pci_runtime_resume, ufshcd_pci_runtime_idle) }; static DEFINE_PCI_DEVICE_TABLE(ufshcd_pci_tbl) = { { PCI_VENDOR_ID_SAMSUNG, 0xC00C, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, { PCI_VDEVICE(INTEL, 0x9DFA), (kernel_ulong_t)&ufs_intel_cnl_hba_vops }, { } /* terminate list */ }; MODULE_DEVICE_TABLE(pci, ufshcd_pci_tbl); static struct pci_driver ufshcd_pci_driver = { .name = UFSHCD, .id_table = ufshcd_pci_tbl, .probe = ufshcd_pci_probe, .remove = ufshcd_pci_remove, .shutdown = ufshcd_pci_shutdown, .driver = { .pm = &ufshcd_pci_pm_ops }, }; module_pci_driver(ufshcd_pci_driver); MODULE_AUTHOR("Santosh Yaragnavi "); MODULE_AUTHOR("Vinayak Holikatti "); MODULE_DESCRIPTION("UFS host controller PCI glue driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(UFSHCD_DRIVER_VERSION);