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Pavankumar Kondetib0848ae2010-12-07 17:53:56 +05301/* ehci-msm.c - HSUSB Host Controller Driver Implementation
2 *
Pavankumar Kondeti18f53462011-02-18 17:30:11 +05303 * Copyright (c) 2008-2011, Code Aurora Forum. All rights reserved.
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +05304 *
5 * Partly derived from ehci-fsl.c and ehci-hcd.c
6 * Copyright (c) 2000-2004 by David Brownell
7 * Copyright (c) 2005 MontaVista Software
8 *
9 * All source code in this file is licensed under the following license except
10 * where indicated.
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License version 2 as published
14 * by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
19 *
20 * See the GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, you can find it at http://www.fsf.org
23 */
24
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +053025#include <linux/clk.h>
26#include <linux/err.h>
Manjunath Goudar8c68e842013-04-02 18:24:03 +020027#include <linux/io.h>
28#include <linux/kernel.h>
29#include <linux/module.h>
30#include <linux/platform_device.h>
Pavankumar Kondeti8bb6a162010-12-07 17:53:57 +053031#include <linux/pm_runtime.h>
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +053032#include <linux/usb/otg.h>
33#include <linux/usb/msm_hsusb_hw.h>
Manjunath Goudar8c68e842013-04-02 18:24:03 +020034#include <linux/usb.h>
35#include <linux/usb/hcd.h>
36
37#include "ehci.h"
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +053038
39#define MSM_USB_BASE (hcd->regs)
40
Manjunath Goudar8c68e842013-04-02 18:24:03 +020041#define DRIVER_DESC "Qualcomm On-Chip EHCI Host Controller"
42
43static const char hcd_name[] = "ehci-msm";
44static struct hc_driver __read_mostly msm_hc_driver;
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +053045
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +053046static int ehci_msm_reset(struct usb_hcd *hcd)
47{
48 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
49 int retval;
50
51 ehci->caps = USB_CAPLENGTH;
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +053052 hcd->has_tt = 1;
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +053053
Matthieu CASTET2cb30bb2011-07-02 20:59:46 +020054 retval = ehci_setup(hcd);
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +053055 if (retval)
56 return retval;
57
58 /* bursts of unspecified length. */
59 writel(0, USB_AHBBURST);
60 /* Use the AHB transactor */
61 writel(0, USB_AHBMODE);
62 /* Disable streaming mode and select host mode */
63 writel(0x13, USB_USBMODE);
64
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +053065 return 0;
66}
67
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +053068static int ehci_msm_probe(struct platform_device *pdev)
69{
70 struct usb_hcd *hcd;
71 struct resource *res;
Ivan T. Ivanove4f0da02013-10-11 14:46:09 +030072 struct usb_phy *phy;
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +053073 int ret;
74
75 dev_dbg(&pdev->dev, "ehci_msm proble\n");
76
77 hcd = usb_create_hcd(&msm_hc_driver, &pdev->dev, dev_name(&pdev->dev));
78 if (!hcd) {
79 dev_err(&pdev->dev, "Unable to create HCD\n");
80 return -ENOMEM;
81 }
82
83 hcd->irq = platform_get_irq(pdev, 0);
84 if (hcd->irq < 0) {
85 dev_err(&pdev->dev, "Unable to get IRQ resource\n");
86 ret = hcd->irq;
87 goto put_hcd;
88 }
89
90 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
91 if (!res) {
92 dev_err(&pdev->dev, "Unable to get memory resource\n");
93 ret = -ENODEV;
94 goto put_hcd;
95 }
96
97 hcd->rsrc_start = res->start;
98 hcd->rsrc_len = resource_size(res);
Julia Lawalldf5eb3f2012-07-29 21:46:11 +020099 hcd->regs = devm_ioremap(&pdev->dev, hcd->rsrc_start, hcd->rsrc_len);
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +0530100 if (!hcd->regs) {
101 dev_err(&pdev->dev, "ioremap failed\n");
102 ret = -ENOMEM;
103 goto put_hcd;
104 }
105
106 /*
107 * OTG driver takes care of PHY initialization, clock management,
Pavankumar Kondeti8bb6a162010-12-07 17:53:57 +0530108 * powering up VBUS, mapping of registers address space and power
109 * management.
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +0530110 */
Ivan T. Ivanov0fc924b2013-10-11 14:46:10 +0300111 if (pdev->dev.of_node)
112 phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
113 else
114 phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
115
Felipe Balbie299bd92013-03-15 11:02:56 +0200116 if (IS_ERR(phy)) {
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +0530117 dev_err(&pdev->dev, "unable to find transceiver\n");
Ivan T. Ivanov0fc924b2013-10-11 14:46:10 +0300118 ret = -EPROBE_DEFER;
Julia Lawalldf5eb3f2012-07-29 21:46:11 +0200119 goto put_hcd;
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +0530120 }
121
Heikki Krogerus6e13c652012-02-13 13:24:20 +0200122 ret = otg_set_host(phy->otg, &hcd->self);
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +0530123 if (ret < 0) {
124 dev_err(&pdev->dev, "unable to register with transceiver\n");
Julia Lawalldf5eb3f2012-07-29 21:46:11 +0200125 goto put_hcd;
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +0530126 }
127
Ivan T. Ivanove4f0da02013-10-11 14:46:09 +0300128 hcd->phy = phy;
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +0530129 device_init_wakeup(&pdev->dev, 1);
Pavankumar Kondeti8bb6a162010-12-07 17:53:57 +0530130 /*
131 * OTG device parent of HCD takes care of putting
132 * hardware into low power mode.
133 */
134 pm_runtime_no_callbacks(&pdev->dev);
135 pm_runtime_enable(&pdev->dev);
136
Manjunath Goudar8c68e842013-04-02 18:24:03 +0200137 /* FIXME: need to call usb_add_hcd() here? */
138
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +0530139 return 0;
140
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +0530141put_hcd:
142 usb_put_hcd(hcd);
143
144 return ret;
145}
146
Bill Pembertonfb4e98a2012-11-19 13:26:20 -0500147static int ehci_msm_remove(struct platform_device *pdev)
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +0530148{
149 struct usb_hcd *hcd = platform_get_drvdata(pdev);
150
151 device_init_wakeup(&pdev->dev, 0);
Pavankumar Kondeti8bb6a162010-12-07 17:53:57 +0530152 pm_runtime_disable(&pdev->dev);
153 pm_runtime_set_suspended(&pdev->dev);
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +0530154
Ivan T. Ivanove4f0da02013-10-11 14:46:09 +0300155 otg_set_host(hcd->phy->otg, NULL);
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +0530156
Manjunath Goudar8c68e842013-04-02 18:24:03 +0200157 /* FIXME: need to call usb_remove_hcd() here? */
158
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +0530159 usb_put_hcd(hcd);
160
161 return 0;
162}
163
Pavankumar Kondeti8bb6a162010-12-07 17:53:57 +0530164#ifdef CONFIG_PM
165static int ehci_msm_pm_suspend(struct device *dev)
166{
167 struct usb_hcd *hcd = dev_get_drvdata(dev);
Alan Sternc5cf9212012-06-28 11:19:02 -0400168 bool do_wakeup = device_may_wakeup(dev);
Pavankumar Kondeti8bb6a162010-12-07 17:53:57 +0530169
170 dev_dbg(dev, "ehci-msm PM suspend\n");
171
Alan Sternc5cf9212012-06-28 11:19:02 -0400172 return ehci_suspend(hcd, do_wakeup);
Pavankumar Kondeti8bb6a162010-12-07 17:53:57 +0530173}
174
175static int ehci_msm_pm_resume(struct device *dev)
176{
177 struct usb_hcd *hcd = dev_get_drvdata(dev);
178
179 dev_dbg(dev, "ehci-msm PM resume\n");
Alan Sternc5cf9212012-06-28 11:19:02 -0400180 ehci_resume(hcd, false);
Pavankumar Kondeti8bb6a162010-12-07 17:53:57 +0530181
182 return 0;
183}
184#else
185#define ehci_msm_pm_suspend NULL
186#define ehci_msm_pm_resume NULL
187#endif
188
189static const struct dev_pm_ops ehci_msm_dev_pm_ops = {
190 .suspend = ehci_msm_pm_suspend,
191 .resume = ehci_msm_pm_resume,
192};
193
Ivan T. Ivanov0fc924b2013-10-11 14:46:10 +0300194static struct of_device_id msm_ehci_dt_match[] = {
195 { .compatible = "qcom,ehci-host", },
196 {}
197};
198MODULE_DEVICE_TABLE(of, msm_ehci_dt_match);
199
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +0530200static struct platform_driver ehci_msm_driver = {
201 .probe = ehci_msm_probe,
Bill Pemberton76904172012-11-19 13:21:08 -0500202 .remove = ehci_msm_remove,
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +0530203 .driver = {
204 .name = "msm_hsusb_host",
Pavankumar Kondeti8bb6a162010-12-07 17:53:57 +0530205 .pm = &ehci_msm_dev_pm_ops,
Ivan T. Ivanov0fc924b2013-10-11 14:46:10 +0300206 .of_match_table = msm_ehci_dt_match,
Pavankumar Kondetib0848ae2010-12-07 17:53:56 +0530207 },
208};
Manjunath Goudar8c68e842013-04-02 18:24:03 +0200209
210static const struct ehci_driver_overrides msm_overrides __initdata = {
211 .reset = ehci_msm_reset,
212};
213
214static int __init ehci_msm_init(void)
215{
216 if (usb_disabled())
217 return -ENODEV;
218
219 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
220 ehci_init_driver(&msm_hc_driver, &msm_overrides);
221 return platform_driver_register(&ehci_msm_driver);
222}
223module_init(ehci_msm_init);
224
225static void __exit ehci_msm_cleanup(void)
226{
227 platform_driver_unregister(&ehci_msm_driver);
228}
229module_exit(ehci_msm_cleanup);
230
231MODULE_DESCRIPTION(DRIVER_DESC);
232MODULE_ALIAS("platform:msm-ehci");
233MODULE_LICENSE("GPL");