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