| /* |
| * 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 <santosh.sy@samsung.com> |
| * Vinayak Holikatti <h.vinayak@samsung.com> |
| * |
| * 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 |
| * <http://www.gnu.org/licenses/gpl-2.0.html> |
| * |
| * 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 <linux/pci.h> |
| #include <linux/pm_runtime.h> |
| |
| 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 |
| * @dev: pointer to PCI device handle |
| * |
| * 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 |
| * @dev: 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); |
| ufshcd_remove(hba); |
| 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 const struct pci_device_id 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 }, |
| { PCI_VDEVICE(INTEL, 0x4B41), (kernel_ulong_t)&ufs_intel_cnl_hba_vops }, |
| { PCI_VDEVICE(INTEL, 0x4B43), (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 <santosh.sy@samsung.com>"); |
| MODULE_AUTHOR("Vinayak Holikatti <h.vinayak@samsung.com>"); |
| MODULE_DESCRIPTION("UFS host controller PCI glue driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(UFSHCD_DRIVER_VERSION); |