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