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
  25 static int tc_type = TC_G210_INV;
  26 module_param(tc_type, int, 0);
  27 MODULE_PARM_DESC(tc_type, "Test Chip Type (20 = 20-bit, 40 = 40-bit)");
  28
  29 static int tc_dwc_g210_pci_suspend(struct device *dev)
  30 {
  31         return ufshcd_system_suspend(dev_get_drvdata(dev));
  32 }
  33
  34 static int tc_dwc_g210_pci_resume(struct device *dev)
  35 {
  36         return ufshcd_system_resume(dev_get_drvdata(dev));
  37 }
  38
  39 static int tc_dwc_g210_pci_runtime_suspend(struct device *dev)
  40 {
  41         return ufshcd_runtime_suspend(dev_get_drvdata(dev));
  42 }
  43
  44 static int tc_dwc_g210_pci_runtime_resume(struct device *dev)
  45 {
  46         return ufshcd_runtime_resume(dev_get_drvdata(dev));
  47 }
  48
  49 static 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  */
  57 static 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  */
  66 static 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  */
  76 static 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  */
  92 static int
  93 tc_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
 148 static 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
 156 static 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
 162 MODULE_DEVICE_TABLE(pci, tc_dwc_g210_pci_tbl);
 163
 164 static 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
 175 module_pci_driver(tc_dwc_g210_pci_driver);
 176
 177 MODULE_AUTHOR("Joao Pinto <Joao.Pinto@synopsys.com>");
 178 MODULE_DESCRIPTION("Synopsys Test Chip G210 PCI glue driver");
 179 MODULE_LICENSE("Dual BSD/GPL");