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