LXR linux/drivers/scsi/ufs/tc-dwc-g210-pci.c

   1/*
   2 * Synopsys G210 Test Chip driver
   3 *
   4 * Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com)
   5 *
   6 * Authors: Joao Pinto <jpinto@synopsys.com>
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License version 2 as
  10 * published by the Free Software Foundation.
  11 */
  12
  13#include "ufshcd.h"
  14#include "ufshcd-dwc.h"
  15#include "tc-dwc-g210.h"
  16
  17#include <linux/pci.h>
  18#include <linux/pm_runtime.h>
  19
  20/* Test Chip type expected values */
  21#define TC_G210_20BIT 20
  22#define TC_G210_40BIT 40
  23#define TC_G210_INV 0
  24
  25static int tc_type = TC_G210_INV;
  26module_param(tc_type, int, 0);
  27MODULE_PARM_DESC(tc_type, "Test Chip Type (20 = 20-bit, 40 = 40-bit)");
  28
  29static int tc_dwc_g210_pci_suspend(struct device *dev)
  30{
  31        return ufshcd_system_suspend(dev_get_drvdata(dev));
  32}
  33
  34static int tc_dwc_g210_pci_resume(struct device *dev)
  35{
  36        return ufshcd_system_resume(dev_get_drvdata(dev));
  37}
  38
  39static int tc_dwc_g210_pci_runtime_suspend(struct device *dev)
  40{
  41        return ufshcd_runtime_suspend(dev_get_drvdata(dev));
  42}
  43
  44static int tc_dwc_g210_pci_runtime_resume(struct device *dev)
  45{
  46        return ufshcd_runtime_resume(dev_get_drvdata(dev));
  47}
  48
  49static int tc_dwc_g210_pci_runtime_idle(struct device *dev)
  50{
  51        return ufshcd_runtime_idle(dev_get_drvdata(dev));
  52}
  53
  54/**
  55 * struct ufs_hba_dwc_vops - UFS DWC specific variant operations
  56 */
  57static struct ufs_hba_variant_ops tc_dwc_g210_pci_hba_vops = {
  58        .name                   = "tc-dwc-g210-pci",
  59        .link_startup_notify    = ufshcd_dwc_link_startup_notify,
  60};
  61
  62/**
  63 * tc_dwc_g210_pci_shutdown - main function to put the controller in reset state
  64 * @pdev: pointer to PCI device handle
  65 */
  66static void tc_dwc_g210_pci_shutdown(struct pci_dev *pdev)
  67{
  68        ufshcd_shutdown((struct ufs_hba *)pci_get_drvdata(pdev));
  69}
  70
  71/**
  72 * tc_dwc_g210_pci_remove - de-allocate PCI/SCSI host and host memory space
  73 *              data structure memory
  74 * @pdev - pointer to PCI handle
  75 */
  76static void tc_dwc_g210_pci_remove(struct pci_dev *pdev)
  77{
  78        struct ufs_hba *hba = pci_get_drvdata(pdev);
  79
  80        pm_runtime_forbid(&pdev->dev);
  81        pm_runtime_get_noresume(&pdev->dev);
  82        ufshcd_remove(hba);
  83}
  84
  85/**
  86 * tc_dwc_g210_pci_probe - probe routine of the driver
  87 * @pdev: pointer to PCI device handle
  88 * @id: PCI device id
  89 *
  90 * Returns 0 on success, non-zero value on failure
  91 */
  92static int
  93tc_dwc_g210_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
  94{
  95        struct ufs_hba *hba;
  96        void __iomem *mmio_base;
  97        int err;
  98
  99        /* Check Test Chip type and set the specific setup routine */
 100        if (tc_type == TC_G210_20BIT) {
 101                tc_dwc_g210_pci_hba_vops.phy_initialization =
 102                                                tc_dwc_g210_config_20_bit;
 103        } else if (tc_type == TC_G210_40BIT) {
 104                tc_dwc_g210_pci_hba_vops.phy_initialization =
 105                                                tc_dwc_g210_config_40_bit;
 106        } else {
 107                dev_err(&pdev->dev, "test chip version not specified\n");
 108                return -EPERM;
 109        }
 110
 111        err = pcim_enable_device(pdev);
 112        if (err) {
 113                dev_err(&pdev->dev, "pcim_enable_device failed\n");
 114                return err;
 115        }
 116
 117        pci_set_master(pdev);
 118
 119        err = pcim_iomap_regions(pdev, 1 << 0, UFSHCD);
 120        if (err < 0) {
 121                dev_err(&pdev->dev, "request and iomap failed\n");
 122                return err;
 123        }
 124
 125        mmio_base = pcim_iomap_table(pdev)[0];
 126
 127        err = ufshcd_alloc_host(&pdev->dev, &hba);
 128        if (err) {
 129                dev_err(&pdev->dev, "Allocation failed\n");
 130                return err;
 131        }
 132
 133        hba->vops = &tc_dwc_g210_pci_hba_vops;
 134
 135        err = ufshcd_init(hba, mmio_base, pdev->irq);
 136        if (err) {
 137                dev_err(&pdev->dev, "Initialization failed\n");
 138                return err;
 139        }
 140
 141        pci_set_drvdata(pdev, hba);
 142        pm_runtime_put_noidle(&pdev->dev);
 143        pm_runtime_allow(&pdev->dev);
 144
 145        return 0;
 146}
 147
 148static const struct dev_pm_ops tc_dwc_g210_pci_pm_ops = {
 149        .suspend        = tc_dwc_g210_pci_suspend,
 150        .resume         = tc_dwc_g210_pci_resume,
 151        .runtime_suspend = tc_dwc_g210_pci_runtime_suspend,
 152        .runtime_resume  = tc_dwc_g210_pci_runtime_resume,
 153        .runtime_idle    = tc_dwc_g210_pci_runtime_idle,
 154};
 155
 156static const struct pci_device_id tc_dwc_g210_pci_tbl[] = {
 157        { PCI_VENDOR_ID_SYNOPSYS, 0xB101, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 158        { PCI_VENDOR_ID_SYNOPSYS, 0xB102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 159        { }     /* terminate list */
 160};
 161
 162MODULE_DEVICE_TABLE(pci, tc_dwc_g210_pci_tbl);
 163
 164static struct pci_driver tc_dwc_g210_pci_driver = {
 165        .name = "tc-dwc-g210-pci",
 166        .id_table = tc_dwc_g210_pci_tbl,
 167        .probe = tc_dwc_g210_pci_probe,
 168        .remove = tc_dwc_g210_pci_remove,
 169        .shutdown = tc_dwc_g210_pci_shutdown,
 170        .driver = {
 171                .pm = &tc_dwc_g210_pci_pm_ops
 172        },
 173};
 174
 175module_pci_driver(tc_dwc_g210_pci_driver);
 176
 177MODULE_AUTHOR("Joao Pinto <Joao.Pinto@synopsys.com>");
 178MODULE_DESCRIPTION("Synopsys Test Chip G210 PCI glue driver");
 179MODULE_LICENSE("Dual BSD/GPL");
 180