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		/* use AHB transactor, allow posted data writes */
 29		writel(0x8, USB_AHBMODE);
 30		usb_phy_init(ci->usb_phy);
 31		break;
 32	case CI_HDRC_CONTROLLER_STOPPED_EVENT:
 33		dev_dbg(dev, "CI_HDRC_CONTROLLER_STOPPED_EVENT received\n");
 34		/*
 35		 * Put the phy in non-driving mode. Otherwise host
 36		 * may not detect soft-disconnection.
 37		 */
 38		usb_phy_notify_disconnect(ci->usb_phy, USB_SPEED_UNKNOWN);
 39		break;
 40	default:
 41		dev_dbg(dev, "unknown ci_hdrc event\n");
 42		break;
 43	}
 44}
 45
 46static struct ci_hdrc_platform_data ci_hdrc_msm_platdata = {
 47	.name			= "ci_hdrc_msm",
 48	.capoffset		= DEF_CAPOFFSET,
 49	.flags			= CI_HDRC_REGS_SHARED |
 50				  CI_HDRC_DISABLE_STREAMING,
 51
 52	.notify_event		= ci_hdrc_msm_notify_event,
 53};
 54
 55static int ci_hdrc_msm_probe(struct platform_device *pdev)
 56{
 57	struct platform_device *plat_ci;
 58	struct usb_phy *phy;
 59
 60	dev_dbg(&pdev->dev, "ci_hdrc_msm_probe\n");
 61
 62	/*
 63	 * OTG(PHY) driver takes care of PHY initialization, clock management,
 64	 * powering up VBUS, mapping of registers address space and power
 65	 * management.
 66	 */
 67	phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
 68	if (IS_ERR(phy))
 69		return PTR_ERR(phy);
 70
 71	ci_hdrc_msm_platdata.usb_phy = phy;
 72
 73	plat_ci = ci_hdrc_add_device(&pdev->dev,
 74				pdev->resource, pdev->num_resources,
 75				&ci_hdrc_msm_platdata);
 76	if (IS_ERR(plat_ci)) {
 77		dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n");
 78		return PTR_ERR(plat_ci);
 79	}
 80
 81	platform_set_drvdata(pdev, plat_ci);
 82
 83	pm_runtime_no_callbacks(&pdev->dev);
 84	pm_runtime_enable(&pdev->dev);
 85
 86	return 0;
 87}
 88
 89static int ci_hdrc_msm_remove(struct platform_device *pdev)
 90{
 91	struct platform_device *plat_ci = platform_get_drvdata(pdev);
 92
 93	pm_runtime_disable(&pdev->dev);
 94	ci_hdrc_remove_device(plat_ci);
 95
 96	return 0;
 97}
 98
 99static const struct of_device_id msm_ci_dt_match[] = {
100	{ .compatible = "qcom,ci-hdrc", },
101	{ }
102};
103MODULE_DEVICE_TABLE(of, msm_ci_dt_match);
104
105static struct platform_driver ci_hdrc_msm_driver = {
106	.probe = ci_hdrc_msm_probe,
107	.remove = ci_hdrc_msm_remove,
108	.driver = {
109		.name = "msm_hsusb",
110		.of_match_table = msm_ci_dt_match,
111	},
112};
113
114module_platform_driver(ci_hdrc_msm_driver);
115
116MODULE_ALIAS("platform:msm_hsusb");
117MODULE_ALIAS("platform:ci13xxx_msm");
118MODULE_LICENSE("GPL v2");