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Linux/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 
 24         switch (event) {
 25         case CI_HDRC_CONTROLLER_RESET_EVENT:
 26                 dev_dbg(dev, "CI_HDRC_CONTROLLER_RESET_EVENT received\n");
 27                 writel(0, USB_AHBBURST);
 28                 writel(0, USB_AHBMODE);
 29                 usb_phy_init(ci->usb_phy);
 30                 break;
 31         case CI_HDRC_CONTROLLER_STOPPED_EVENT:
 32                 dev_dbg(dev, "CI_HDRC_CONTROLLER_STOPPED_EVENT received\n");
 33                 /*
 34                  * Put the phy in non-driving mode. Otherwise host
 35                  * may not detect soft-disconnection.
 36                  */
 37                 usb_phy_notify_disconnect(ci->usb_phy, USB_SPEED_UNKNOWN);
 38                 break;
 39         default:
 40                 dev_dbg(dev, "unknown ci_hdrc event\n");
 41                 break;
 42         }
 43 }
 44 
 45 static struct ci_hdrc_platform_data ci_hdrc_msm_platdata = {
 46         .name                   = "ci_hdrc_msm",
 47         .capoffset              = DEF_CAPOFFSET,
 48         .flags                  = CI_HDRC_REGS_SHARED |
 49                                   CI_HDRC_DISABLE_STREAMING,
 50 
 51         .notify_event           = ci_hdrc_msm_notify_event,
 52 };
 53 
 54 static int ci_hdrc_msm_probe(struct platform_device *pdev)
 55 {
 56         struct platform_device *plat_ci;
 57         struct usb_phy *phy;
 58 
 59         dev_dbg(&pdev->dev, "ci_hdrc_msm_probe\n");
 60 
 61         /*
 62          * OTG(PHY) driver takes care of PHY initialization, clock management,
 63          * powering up VBUS, mapping of registers address space and power
 64          * management.
 65          */
 66         phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
 67         if (IS_ERR(phy))
 68                 return PTR_ERR(phy);
 69 
 70         ci_hdrc_msm_platdata.usb_phy = phy;
 71 
 72         plat_ci = ci_hdrc_add_device(&pdev->dev,
 73                                 pdev->resource, pdev->num_resources,
 74                                 &ci_hdrc_msm_platdata);
 75         if (IS_ERR(plat_ci)) {
 76                 dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n");
 77                 return PTR_ERR(plat_ci);
 78         }
 79 
 80         platform_set_drvdata(pdev, plat_ci);
 81 
 82         pm_runtime_no_callbacks(&pdev->dev);
 83         pm_runtime_enable(&pdev->dev);
 84 
 85         return 0;
 86 }
 87 
 88 static int ci_hdrc_msm_remove(struct platform_device *pdev)
 89 {
 90         struct platform_device *plat_ci = platform_get_drvdata(pdev);
 91 
 92         pm_runtime_disable(&pdev->dev);
 93         ci_hdrc_remove_device(plat_ci);
 94 
 95         return 0;
 96 }
 97 
 98 static const struct of_device_id msm_ci_dt_match[] = {
 99         { .compatible = "qcom,ci-hdrc", },
100         { }
101 };
102 MODULE_DEVICE_TABLE(of, msm_ci_dt_match);
103 
104 static struct platform_driver ci_hdrc_msm_driver = {
105         .probe = ci_hdrc_msm_probe,
106         .remove = ci_hdrc_msm_remove,
107         .driver = {
108                 .name = "msm_hsusb",
109                 .of_match_table = msm_ci_dt_match,
110         },
111 };
112 
113 module_platform_driver(ci_hdrc_msm_driver);
114 
115 MODULE_ALIAS("platform:msm_hsusb");
116 MODULE_ALIAS("platform:ci13xxx_msm");
117 MODULE_LICENSE("GPL v2");
118 

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