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 	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 
48 static struct ci_hdrc_platform_data ci_hdrc_msm_platdata = {
49 	.name			= "ci_hdrc_msm",
50 	.capoffset		= DEF_CAPOFFSET,
51 	.flags			= CI_HDRC_REGS_SHARED |
52 				  CI_HDRC_REQUIRE_TRANSCEIVER |
53 				  CI_HDRC_DISABLE_STREAMING,
54 
55 	.notify_event		= ci_hdrc_msm_notify_event,
56 };
57 
58 static int ci_hdrc_msm_probe(struct platform_device *pdev)
59 {
60 	struct platform_device *plat_ci;
61 	struct usb_phy *phy;
62 
63 	dev_dbg(&pdev->dev, "ci_hdrc_msm_probe\n");
64 
65 	/*
66 	 * OTG(PHY) driver takes care of PHY initialization, clock management,
67 	 * powering up VBUS, mapping of registers address space and power
68 	 * management.
69 	 */
70 	phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
71 	if (IS_ERR(phy))
72 		return PTR_ERR(phy);
73 
74 	ci_hdrc_msm_platdata.phy = phy;
75 
76 	plat_ci = ci_hdrc_add_device(&pdev->dev,
77 				pdev->resource, pdev->num_resources,
78 				&ci_hdrc_msm_platdata);
79 	if (IS_ERR(plat_ci)) {
80 		dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n");
81 		return PTR_ERR(plat_ci);
82 	}
83 
84 	platform_set_drvdata(pdev, plat_ci);
85 
86 	pm_runtime_no_callbacks(&pdev->dev);
87 	pm_runtime_enable(&pdev->dev);
88 
89 	return 0;
90 }
91 
92 static int ci_hdrc_msm_remove(struct platform_device *pdev)
93 {
94 	struct platform_device *plat_ci = platform_get_drvdata(pdev);
95 
96 	pm_runtime_disable(&pdev->dev);
97 	ci_hdrc_remove_device(plat_ci);
98 
99 	return 0;
100 }
101 
102 static const struct of_device_id msm_ci_dt_match[] = {
103 	{ .compatible = "qcom,ci-hdrc", },
104 	{ }
105 };
106 MODULE_DEVICE_TABLE(of, msm_ci_dt_match);
107 
108 static struct platform_driver ci_hdrc_msm_driver = {
109 	.probe = ci_hdrc_msm_probe,
110 	.remove = ci_hdrc_msm_remove,
111 	.driver = {
112 		.name = "msm_hsusb",
113 		.of_match_table = msm_ci_dt_match,
114 	},
115 };
116 
117 module_platform_driver(ci_hdrc_msm_driver);
118 
119 MODULE_ALIAS("platform:msm_hsusb");
120 MODULE_ALIAS("platform:ci13xxx_msm");
121 MODULE_LICENSE("GPL v2");
122