LXR linux/drivers/usb/chipidea/ci_hdrc

   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
  20static 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
  45static 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
  54static 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
  88static 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
  98static const struct of_device_id msm_ci_dt_match[] = {
  99        { .compatible = "qcom,ci-hdrc", },
 100        { }
 101};
 102MODULE_DEVICE_TABLE(of, msm_ci_dt_match);
 103
 104static 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
 113module_platform_driver(ci_hdrc_msm_driver);
 114
 115MODULE_ALIAS("platform:msm_hsusb");
 116MODULE_ALIAS("platform:ci13xxx_msm");
 117MODULE_LICENSE("GPL v2");
 118