drivers/usb/chipidea/ci_hdrc_msm.c

   1 /* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License version 2 and
   5  * only version 2 as published by the Free Software Foundation.
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/platform_device.h>
  10 #include <linux/pm_runtime.h>
  11 #include <linux/usb/msm_hsusb_hw.h>
  12 #include <linux/usb/ulpi.h>
  13 #include <linux/usb/gadget.h>
  14 #include <linux/usb/chipidea.h>
  15
  16 #include "ci.h"
  17
  18 #define MSM_USB_BASE    (ci->hw_bank.abs)
  19
  20 static void ci_hdrc_msm_notify_event(struct ci_hdrc *ci, unsigned event)
  21 {
  22         struct device *dev = ci->gadget.dev.parent;
  23         int val;
  24
  25         switch (event) {
  26         case CI_HDRC_CONTROLLER_RESET_EVENT:
  27                 dev_dbg(dev, "CI_HDRC_CONTROLLER_RESET_EVENT received\n");
  28                 writel(0, USB_AHBBURST);
  29                 writel(0, USB_AHBMODE);
  30                 break;
  31         case CI_HDRC_CONTROLLER_STOPPED_EVENT:
  32                 dev_dbg(dev, "CI_HDRC_CONTROLLER_STOPPED_EVENT received\n");
  33                 /*
  34                  * Put the transceiver in non-driving mode. Otherwise host
  35                  * may not detect soft-disconnection.
  36                  */
  37                 val = usb_phy_io_read(ci->transceiver, ULPI_FUNC_CTRL);
  38                 val &= ~ULPI_FUNC_CTRL_OPMODE_MASK;
  39                 val |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING;
  40                 usb_phy_io_write(ci->transceiver, val, ULPI_FUNC_CTRL);
  41                 break;
  42         default:
  43                 dev_dbg(dev, "unknown ci_hdrc event\n");
  44                 break;
  45         }
  46 }
  47
  48 static struct ci_hdrc_platform_data ci_hdrc_msm_platdata = {
  49         .name                   = "ci_hdrc_msm",
  50         .capoffset              = DEF_CAPOFFSET,
  51         .flags                  = CI_HDRC_REGS_SHARED |
  52                                   CI_HDRC_REQUIRE_TRANSCEIVER |
  53                                   CI_HDRC_DISABLE_STREAMING,
  54
  55         .notify_event           = ci_hdrc_msm_notify_event,
  56 };
  57
  58 static int ci_hdrc_msm_probe(struct platform_device *pdev)
  59 {
  60         struct platform_device *plat_ci;
  61         struct usb_phy *phy;
  62
  63         dev_dbg(&pdev->dev, "ci_hdrc_msm_probe\n");
  64
  65         /*
  66          * OTG(PHY) driver takes care of PHY initialization, clock management,
  67          * powering up VBUS, mapping of registers address space and power
  68          * management.
  69          */
  70         phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
  71         if (IS_ERR(phy))
  72                 return PTR_ERR(phy);
  73
  74         ci_hdrc_msm_platdata.phy = phy;
  75
  76         plat_ci = ci_hdrc_add_device(&pdev->dev,
  77                                 pdev->resource, pdev->num_resources,
  78                                 &ci_hdrc_msm_platdata);
  79         if (IS_ERR(plat_ci)) {
  80                 dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n");
  81                 return PTR_ERR(plat_ci);
  82         }
  83
  84         platform_set_drvdata(pdev, plat_ci);
  85
  86         pm_runtime_no_callbacks(&pdev->dev);
  87         pm_runtime_enable(&pdev->dev);
  88
  89         return 0;
  90 }
  91
  92 static int ci_hdrc_msm_remove(struct platform_device *pdev)
  93 {
  94         struct platform_device *plat_ci = platform_get_drvdata(pdev);
  95
  96         pm_runtime_disable(&pdev->dev);
  97         ci_hdrc_remove_device(plat_ci);
  98
  99         return 0;
 100 }
 101
 102 static const struct of_device_id msm_ci_dt_match[] = {
 103         { .compatible = "qcom,ci-hdrc", },
 104         { }
 105 };
 106 MODULE_DEVICE_TABLE(of, msm_ci_dt_match);
 107
 108 static struct platform_driver ci_hdrc_msm_driver = {
 109         .probe = ci_hdrc_msm_probe,
 110         .remove = ci_hdrc_msm_remove,
 111         .driver = {
 112                 .name = "msm_hsusb",
 113                 .of_match_table = msm_ci_dt_match,
 114         },
 115 };
 116
 117 module_platform_driver(ci_hdrc_msm_driver);
 118
 119 MODULE_ALIAS("platform:msm_hsusb");
 120 MODULE_ALIAS("platform:ci13xxx_msm");
 121 MODULE_LICENSE("GPL v2");