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