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 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 .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
58static 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
92static 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
102static const struct of_device_id msm_ci_dt_match[] = {
103 { .compatible = "qcom,ci-hdrc", },
104 { }
105};
106MODULE_DEVICE_TABLE(of, msm_ci_dt_match);
107
108static 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
117module_platform_driver(ci_hdrc_msm_driver);
118
119MODULE_ALIAS("platform:msm_hsusb");
120MODULE_ALIAS("platform:ci13xxx_msm");
121MODULE_LICENSE("GPL v2");