drivers/scsi/ufs/tc-dwc-g210-pltfrm.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 <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/of.h>
  14 #include <linux/delay.h>
  15
  16 #include "ufshcd-pltfrm.h"
  17 #include "ufshcd-dwc.h"
  18 #include "tc-dwc-g210.h"
  19
  20 /*
  21  * UFS DWC specific variant operations
  22  */
  23 static struct ufs_hba_variant_ops tc_dwc_g210_20bit_pltfm_hba_vops = {
  24         .name                   = "tc-dwc-g210-pltfm",
  25         .link_startup_notify    = ufshcd_dwc_link_startup_notify,
  26         .phy_initialization = tc_dwc_g210_config_20_bit,
  27 };
  28
  29 static struct ufs_hba_variant_ops tc_dwc_g210_40bit_pltfm_hba_vops = {
  30         .name                   = "tc-dwc-g210-pltfm",
  31         .link_startup_notify    = ufshcd_dwc_link_startup_notify,
  32         .phy_initialization = tc_dwc_g210_config_40_bit,
  33 };
  34
  35 static const struct of_device_id tc_dwc_g210_pltfm_match[] = {
  36         {
  37                 .compatible = "snps,g210-tc-6.00-20bit",
  38                 .data = &tc_dwc_g210_20bit_pltfm_hba_vops,
  39         },
  40         {
  41                 .compatible = "snps,g210-tc-6.00-40bit",
  42                 .data = &tc_dwc_g210_40bit_pltfm_hba_vops,
  43         },
  44         { },
  45 };
  46 MODULE_DEVICE_TABLE(of, tc_dwc_g210_pltfm_match);
  47
  48 /**
  49  * tc_dwc_g210_pltfm_probe()
  50  * @pdev: pointer to platform device structure
  51  *
  52  */
  53 static int tc_dwc_g210_pltfm_probe(struct platform_device *pdev)
  54 {
  55         int err;
  56         const struct of_device_id *of_id;
  57         struct ufs_hba_variant_ops *vops;
  58         struct device *dev = &pdev->dev;
  59
  60         of_id = of_match_node(tc_dwc_g210_pltfm_match, dev->of_node);
  61         vops = (struct ufs_hba_variant_ops *)of_id->data;
  62
  63         /* Perform generic probe */
  64         err = ufshcd_pltfrm_init(pdev, vops);
  65         if (err)
  66                 dev_err(dev, "ufshcd_pltfrm_init() failed %d\n", err);
  67
  68         return err;
  69 }
  70
  71 /**
  72  * tc_dwc_g210_pltfm_remove()
  73  * @pdev: pointer to platform device structure
  74  *
  75  */
  76 static int tc_dwc_g210_pltfm_remove(struct platform_device *pdev)
  77 {
  78         struct ufs_hba *hba =  platform_get_drvdata(pdev);
  79
  80         pm_runtime_get_sync(&(pdev)->dev);
  81         ufshcd_remove(hba);
  82
  83         return 0;
  84 }
  85
  86 static const struct dev_pm_ops tc_dwc_g210_pltfm_pm_ops = {
  87         .suspend        = ufshcd_pltfrm_suspend,
  88         .resume         = ufshcd_pltfrm_resume,
  89         .runtime_suspend = ufshcd_pltfrm_runtime_suspend,
  90         .runtime_resume  = ufshcd_pltfrm_runtime_resume,
  91         .runtime_idle    = ufshcd_pltfrm_runtime_idle,
  92 };
  93
  94 static struct platform_driver tc_dwc_g210_pltfm_driver = {
  95         .probe          = tc_dwc_g210_pltfm_probe,
  96         .remove         = tc_dwc_g210_pltfm_remove,
  97         .shutdown = ufshcd_pltfrm_shutdown,
  98         .driver         = {
  99                 .name   = "tc-dwc-g210-pltfm",
 100                 .pm     = &tc_dwc_g210_pltfm_pm_ops,
 101                 .of_match_table = of_match_ptr(tc_dwc_g210_pltfm_match),
 102         },
 103 };
 104
 105 module_platform_driver(tc_dwc_g210_pltfm_driver);
 106
 107 MODULE_ALIAS("platform:tc-dwc-g210-pltfm");
 108 MODULE_DESCRIPTION("Synopsys Test Chip G210 platform glue driver");
 109 MODULE_AUTHOR("Joao Pinto <Joao.Pinto@synopsys.com>");
 110 MODULE_LICENSE("Dual BSD/GPL");