256 lines
6.5 KiB
C
256 lines
6.5 KiB
C
/*
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* Universal Flash Storage Host controller PCI glue driver
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*
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* This code is based on drivers/scsi/ufs/ufshcd-pci.c
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* Copyright (C) 2011-2013 Samsung India Software Operations
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*
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* Authors:
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* Santosh Yaraganavi <santosh.sy@samsung.com>
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* Vinayak Holikatti <h.vinayak@samsung.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* See the COPYING file in the top-level directory or visit
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* <http://www.gnu.org/licenses/gpl-2.0.html>
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* This program is provided "AS IS" and "WITH ALL FAULTS" and
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* without warranty of any kind. You are solely responsible for
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* determining the appropriateness of using and distributing
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* the program and assume all risks associated with your exercise
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* of rights with respect to the program, including but not limited
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* to infringement of third party rights, the risks and costs of
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* program errors, damage to or loss of data, programs or equipment,
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* and unavailability or interruption of operations. Under no
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* circumstances will the contributor of this Program be liable for
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* any damages of any kind arising from your use or distribution of
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* this program.
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*/
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#include "ufshcd.h"
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#include <linux/pci.h>
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#include <linux/pm_runtime.h>
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static int ufs_intel_disable_lcc(struct ufs_hba *hba)
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{
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u32 attr = UIC_ARG_MIB(PA_LOCAL_TX_LCC_ENABLE);
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u32 lcc_enable = 0;
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ufshcd_dme_get(hba, attr, &lcc_enable);
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if (lcc_enable)
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ufshcd_disable_host_tx_lcc(hba);
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return 0;
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}
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static int ufs_intel_link_startup_notify(struct ufs_hba *hba,
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enum ufs_notify_change_status status)
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{
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int err = 0;
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switch (status) {
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case PRE_CHANGE:
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err = ufs_intel_disable_lcc(hba);
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break;
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case POST_CHANGE:
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break;
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default:
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break;
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}
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return err;
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}
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static struct ufs_hba_variant_ops ufs_intel_cnl_hba_vops = {
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.name = "intel-pci",
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.link_startup_notify = ufs_intel_link_startup_notify,
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};
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#ifdef CONFIG_PM_SLEEP
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/**
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* ufshcd_pci_suspend - suspend power management function
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* @dev: pointer to PCI device handle
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*
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* Returns 0 if successful
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* Returns non-zero otherwise
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*/
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static int ufshcd_pci_suspend(struct device *dev)
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{
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return ufshcd_system_suspend(dev_get_drvdata(dev));
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}
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/**
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* ufshcd_pci_resume - resume power management function
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* @dev: pointer to PCI device handle
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*
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* Returns 0 if successful
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* Returns non-zero otherwise
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*/
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static int ufshcd_pci_resume(struct device *dev)
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{
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return ufshcd_system_resume(dev_get_drvdata(dev));
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}
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/**
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* ufshcd_pci_poweroff - suspend-to-disk poweroff function
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* @dev: pointer to PCI device handle
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*
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* Returns 0 if successful
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* Returns non-zero otherwise
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*/
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static int ufshcd_pci_poweroff(struct device *dev)
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{
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struct ufs_hba *hba = dev_get_drvdata(dev);
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int spm_lvl = hba->spm_lvl;
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int ret;
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/*
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* For poweroff we need to set the UFS device to PowerDown mode.
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* Force spm_lvl to ensure that.
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*/
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hba->spm_lvl = 5;
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ret = ufshcd_system_suspend(hba);
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hba->spm_lvl = spm_lvl;
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return ret;
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}
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#endif /* !CONFIG_PM_SLEEP */
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#ifdef CONFIG_PM
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static int ufshcd_pci_runtime_suspend(struct device *dev)
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{
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return ufshcd_runtime_suspend(dev_get_drvdata(dev));
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}
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static int ufshcd_pci_runtime_resume(struct device *dev)
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{
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return ufshcd_runtime_resume(dev_get_drvdata(dev));
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}
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static int ufshcd_pci_runtime_idle(struct device *dev)
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{
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return ufshcd_runtime_idle(dev_get_drvdata(dev));
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}
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#endif /* !CONFIG_PM */
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/**
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* ufshcd_pci_shutdown - main function to put the controller in reset state
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* @pdev: pointer to PCI device handle
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*/
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static void ufshcd_pci_shutdown(struct pci_dev *pdev)
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{
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ufshcd_shutdown((struct ufs_hba *)pci_get_drvdata(pdev));
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}
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/**
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* ufshcd_pci_remove - de-allocate PCI/SCSI host and host memory space
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* data structure memory
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* @pdev: pointer to PCI handle
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*/
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static void ufshcd_pci_remove(struct pci_dev *pdev)
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{
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struct ufs_hba *hba = pci_get_drvdata(pdev);
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pm_runtime_forbid(&pdev->dev);
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pm_runtime_get_noresume(&pdev->dev);
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ufshcd_remove(hba);
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ufshcd_dealloc_host(hba);
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}
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/**
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* ufshcd_pci_probe - probe routine of the driver
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* @pdev: pointer to PCI device handle
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* @id: PCI device id
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*
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* Returns 0 on success, non-zero value on failure
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*/
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static int
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ufshcd_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
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{
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struct ufs_hba *hba;
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void __iomem *mmio_base;
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int err;
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err = pcim_enable_device(pdev);
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if (err) {
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dev_err(&pdev->dev, "pcim_enable_device failed\n");
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return err;
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}
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pci_set_master(pdev);
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err = pcim_iomap_regions(pdev, 1 << 0, UFSHCD);
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if (err < 0) {
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dev_err(&pdev->dev, "request and iomap failed\n");
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return err;
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}
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mmio_base = pcim_iomap_table(pdev)[0];
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err = ufshcd_alloc_host(&pdev->dev, &hba);
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if (err) {
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dev_err(&pdev->dev, "Allocation failed\n");
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return err;
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}
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hba->vops = (struct ufs_hba_variant_ops *)id->driver_data;
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err = ufshcd_init(hba, mmio_base, pdev->irq);
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if (err) {
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dev_err(&pdev->dev, "Initialization failed\n");
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ufshcd_dealloc_host(hba);
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return err;
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}
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pci_set_drvdata(pdev, hba);
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pm_runtime_put_noidle(&pdev->dev);
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pm_runtime_allow(&pdev->dev);
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return 0;
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}
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static const struct dev_pm_ops ufshcd_pci_pm_ops = {
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#ifdef CONFIG_PM_SLEEP
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.suspend = ufshcd_pci_suspend,
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.resume = ufshcd_pci_resume,
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.freeze = ufshcd_pci_suspend,
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.thaw = ufshcd_pci_resume,
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.poweroff = ufshcd_pci_poweroff,
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.restore = ufshcd_pci_resume,
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#endif
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SET_RUNTIME_PM_OPS(ufshcd_pci_runtime_suspend,
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ufshcd_pci_runtime_resume,
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ufshcd_pci_runtime_idle)
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};
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static const struct pci_device_id ufshcd_pci_tbl[] = {
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{ PCI_VENDOR_ID_SAMSUNG, 0xC00C, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
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{ PCI_VDEVICE(INTEL, 0x9DFA), (kernel_ulong_t)&ufs_intel_cnl_hba_vops },
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{ } /* terminate list */
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};
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MODULE_DEVICE_TABLE(pci, ufshcd_pci_tbl);
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static struct pci_driver ufshcd_pci_driver = {
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.name = UFSHCD,
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.id_table = ufshcd_pci_tbl,
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.probe = ufshcd_pci_probe,
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.remove = ufshcd_pci_remove,
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.shutdown = ufshcd_pci_shutdown,
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.driver = {
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.pm = &ufshcd_pci_pm_ops
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},
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};
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module_pci_driver(ufshcd_pci_driver);
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MODULE_AUTHOR("Santosh Yaragnavi <santosh.sy@samsung.com>");
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MODULE_AUTHOR("Vinayak Holikatti <h.vinayak@samsung.com>");
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MODULE_DESCRIPTION("UFS host controller PCI glue driver");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(UFSHCD_DRIVER_VERSION);
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