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