tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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");