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	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
48static struct ci_hdrc_platform_data ci_hdrc_msm_platdata = {
49	.name			= "ci_hdrc_msm",
50	.flags			= CI_HDRC_REGS_SHARED |
51				  CI_HDRC_REQUIRE_TRANSCEIVER |
52				  CI_HDRC_DISABLE_STREAMING,
53
54	.notify_event		= ci_hdrc_msm_notify_event,
55};
56
57static int ci_hdrc_msm_probe(struct platform_device *pdev)
58{
59	struct platform_device *plat_ci;
60
61	dev_dbg(&pdev->dev, "ci_hdrc_msm_probe\n");
62
63	plat_ci = ci_hdrc_add_device(&pdev->dev,
64				pdev->resource, pdev->num_resources,
65				&ci_hdrc_msm_platdata);
66	if (IS_ERR(plat_ci)) {
67		dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n");
68		return PTR_ERR(plat_ci);
69	}
70
71	platform_set_drvdata(pdev, plat_ci);
72
73	pm_runtime_no_callbacks(&pdev->dev);
74	pm_runtime_enable(&pdev->dev);
75
76	return 0;
77}
78
79static int ci_hdrc_msm_remove(struct platform_device *pdev)
80{
81	struct platform_device *plat_ci = platform_get_drvdata(pdev);
82
83	pm_runtime_disable(&pdev->dev);
84	ci_hdrc_remove_device(plat_ci);
85
86	return 0;
87}
88
89static struct platform_driver ci_hdrc_msm_driver = {
90	.probe = ci_hdrc_msm_probe,
91	.remove = ci_hdrc_msm_remove,
92	.driver = { .name = "msm_hsusb", },
93};
94
95module_platform_driver(ci_hdrc_msm_driver);
96
97MODULE_ALIAS("platform:msm_hsusb");
98MODULE_ALIAS("platform:ci13xxx_msm");
99MODULE_LICENSE("GPL v2");