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

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Synopsys G210 Test Chip driver
   4 *
   5 * Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com)
   6 *
   7 * Authors: Joao Pinto <jpinto@synopsys.com>
   8 */
   9
  10#include "ufshcd.h"
  11#include "ufshcd-dwc.h"
  12#include "tc-dwc-g210.h"
  13
  14#include <linux/pci.h>
  15#include <linux/pm_runtime.h>
  16
  17/* Test Chip type expected values */
  18#define TC_G210_20BIT 20
  19#define TC_G210_40BIT 40
  20#define TC_G210_INV 0
  21
  22static int tc_type = TC_G210_INV;
  23module_param(tc_type, int, 0);
  24MODULE_PARM_DESC(tc_type, "Test Chip Type (20 = 20-bit, 40 = 40-bit)");
  25
  26/*
  27 * struct ufs_hba_dwc_vops - UFS DWC specific variant operations
  28 */
  29static struct ufs_hba_variant_ops tc_dwc_g210_pci_hba_vops = {
  30        .name                   = "tc-dwc-g210-pci",
  31        .link_startup_notify    = ufshcd_dwc_link_startup_notify,
  32};
  33
  34/**
  35 * tc_dwc_g210_pci_shutdown - main function to put the controller in reset state
  36 * @pdev: pointer to PCI device handle
  37 */
  38static void tc_dwc_g210_pci_shutdown(struct pci_dev *pdev)
  39{
  40        ufshcd_shutdown((struct ufs_hba *)pci_get_drvdata(pdev));
  41}
  42
  43/**
  44 * tc_dwc_g210_pci_remove - de-allocate PCI/SCSI host and host memory space
  45 *              data structure memory
  46 * @pdev: pointer to PCI handle
  47 */
  48static void tc_dwc_g210_pci_remove(struct pci_dev *pdev)
  49{
  50        struct ufs_hba *hba = pci_get_drvdata(pdev);
  51
  52        pm_runtime_forbid(&pdev->dev);
  53        pm_runtime_get_noresume(&pdev->dev);
  54        ufshcd_remove(hba);
  55}
  56
  57/**
  58 * tc_dwc_g210_pci_probe - probe routine of the driver
  59 * @pdev: pointer to PCI device handle
  60 * @id: PCI device id
  61 *
  62 * Returns 0 on success, non-zero value on failure
  63 */
  64static int
  65tc_dwc_g210_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
  66{
  67        struct ufs_hba *hba;
  68        void __iomem *mmio_base;
  69        int err;
  70
  71        /* Check Test Chip type and set the specific setup routine */
  72        if (tc_type == TC_G210_20BIT) {
  73                tc_dwc_g210_pci_hba_vops.phy_initialization =
  74                                                tc_dwc_g210_config_20_bit;
  75        } else if (tc_type == TC_G210_40BIT) {
  76                tc_dwc_g210_pci_hba_vops.phy_initialization =
  77                                                tc_dwc_g210_config_40_bit;
  78        } else {
  79                dev_err(&pdev->dev, "test chip version not specified\n");
  80                return -EPERM;
  81        }
  82
  83        err = pcim_enable_device(pdev);
  84        if (err) {
  85                dev_err(&pdev->dev, "pcim_enable_device failed\n");
  86                return err;
  87        }
  88
  89        pci_set_master(pdev);
  90
  91        err = pcim_iomap_regions(pdev, 1 << 0, UFSHCD);
  92        if (err < 0) {
  93                dev_err(&pdev->dev, "request and iomap failed\n");
  94                return err;
  95        }
  96
  97        mmio_base = pcim_iomap_table(pdev)[0];
  98
  99        err = ufshcd_alloc_host(&pdev->dev, &hba);
 100        if (err) {
 101                dev_err(&pdev->dev, "Allocation failed\n");
 102                return err;
 103        }
 104
 105        hba->vops = &tc_dwc_g210_pci_hba_vops;
 106
 107        err = ufshcd_init(hba, mmio_base, pdev->irq);
 108        if (err) {
 109                dev_err(&pdev->dev, "Initialization failed\n");
 110                return err;
 111        }
 112
 113        pci_set_drvdata(pdev, hba);
 114        pm_runtime_put_noidle(&pdev->dev);
 115        pm_runtime_allow(&pdev->dev);
 116
 117        return 0;
 118}
 119
 120static const struct dev_pm_ops tc_dwc_g210_pci_pm_ops = {
 121        SET_SYSTEM_SLEEP_PM_OPS(ufshcd_system_suspend, ufshcd_system_resume)
 122        SET_RUNTIME_PM_OPS(ufshcd_runtime_suspend, ufshcd_runtime_resume, NULL)
 123        .prepare         = ufshcd_suspend_prepare,
 124        .complete        = ufshcd_resume_complete,
 125};
 126
 127static const struct pci_device_id tc_dwc_g210_pci_tbl[] = {
 128        { PCI_VENDOR_ID_SYNOPSYS, 0xB101, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 129        { PCI_VENDOR_ID_SYNOPSYS, 0xB102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 130        { }     /* terminate list */
 131};
 132
 133MODULE_DEVICE_TABLE(pci, tc_dwc_g210_pci_tbl);
 134
 135static struct pci_driver tc_dwc_g210_pci_driver = {
 136        .name = "tc-dwc-g210-pci",
 137        .id_table = tc_dwc_g210_pci_tbl,
 138        .probe = tc_dwc_g210_pci_probe,
 139        .remove = tc_dwc_g210_pci_remove,
 140        .shutdown = tc_dwc_g210_pci_shutdown,
 141        .driver = {
 142                .pm = &tc_dwc_g210_pci_pm_ops
 143        },
 144};
 145
 146module_pci_driver(tc_dwc_g210_pci_driver);
 147
 148MODULE_AUTHOR("Joao Pinto <Joao.Pinto@synopsys.com>");
 149MODULE_DESCRIPTION("Synopsys Test Chip G210 PCI glue driver");
 150MODULE_LICENSE("Dual BSD/GPL");
 151