1/*
2 * MIPS CI13320A EHCI Host Controller driver
3 * Based on "ehci-au1xxx.c" by K.Boge <karsten.boge@amd.com>
4 *
5 * Copyright (C) 2012 MIPS Technologies, Inc.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15 * for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software Foundation,
19 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22#include <linux/err.h>
23#include <linux/platform_device.h>
24
25static int ehci_sead3_setup(struct usb_hcd *hcd)
26{
27	int ret;
28	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
29
30	ehci->caps = hcd->regs + 0x100;
31
32#ifdef __BIG_ENDIAN
33	ehci->big_endian_mmio = 1;
34	ehci->big_endian_desc = 1;
35#endif
36
37	ret = ehci_setup(hcd);
38	if (ret)
39		return ret;
40
41	ehci->need_io_watchdog = 0;
42
43	/* Set burst length to 16 words. */
44	ehci_writel(ehci, 0x1010, &ehci->regs->reserved1[1]);
45
46	return ret;
47}
48
49const struct hc_driver ehci_sead3_hc_driver = {
50	.description		= hcd_name,
51	.product_desc		= "SEAD-3 EHCI",
52	.hcd_priv_size		= sizeof(struct ehci_hcd),
53
54	/*
55	 * generic hardware linkage
56	 */
57	.irq			= ehci_irq,
58	.flags			= HCD_MEMORY | HCD_USB2 | HCD_BH,
59
60	/*
61	 * basic lifecycle operations
62	 *
63	 */
64	.reset			= ehci_sead3_setup,
65	.start			= ehci_run,
66	.stop			= ehci_stop,
67	.shutdown		= ehci_shutdown,
68
69	/*
70	 * managing i/o requests and associated device resources
71	 */
72	.urb_enqueue		= ehci_urb_enqueue,
73	.urb_dequeue		= ehci_urb_dequeue,
74	.endpoint_disable	= ehci_endpoint_disable,
75	.endpoint_reset		= ehci_endpoint_reset,
76
77	/*
78	 * scheduling support
79	 */
80	.get_frame_number	= ehci_get_frame,
81
82	/*
83	 * root hub support
84	 */
85	.hub_status_data	= ehci_hub_status_data,
86	.hub_control		= ehci_hub_control,
87	.bus_suspend		= ehci_bus_suspend,
88	.bus_resume		= ehci_bus_resume,
89	.relinquish_port	= ehci_relinquish_port,
90	.port_handed_over	= ehci_port_handed_over,
91
92	.clear_tt_buffer_complete	= ehci_clear_tt_buffer_complete,
93};
94
95static int ehci_hcd_sead3_drv_probe(struct platform_device *pdev)
96{
97	struct usb_hcd *hcd;
98	struct resource *res;
99	int ret;
100
101	if (usb_disabled())
102		return -ENODEV;
103
104	if (pdev->resource[1].flags != IORESOURCE_IRQ) {
105		pr_debug("resource[1] is not IORESOURCE_IRQ");
106		return -ENOMEM;
107	}
108	hcd = usb_create_hcd(&ehci_sead3_hc_driver, &pdev->dev, "SEAD-3");
109	if (!hcd)
110		return -ENOMEM;
111
112	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
113	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
114	if (IS_ERR(hcd->regs)) {
115		ret = PTR_ERR(hcd->regs);
116		goto err1;
117	}
118	hcd->rsrc_start = res->start;
119	hcd->rsrc_len = resource_size(res);
120
121	/* Root hub has integrated TT. */
122	hcd->has_tt = 1;
123
124	ret = usb_add_hcd(hcd, pdev->resource[1].start,
125			  IRQF_SHARED);
126	if (ret == 0) {
127		platform_set_drvdata(pdev, hcd);
128		device_wakeup_enable(hcd->self.controller);
129		return ret;
130	}
131
132err1:
133	usb_put_hcd(hcd);
134	return ret;
135}
136
137static int ehci_hcd_sead3_drv_remove(struct platform_device *pdev)
138{
139	struct usb_hcd *hcd = platform_get_drvdata(pdev);
140
141	usb_remove_hcd(hcd);
142	usb_put_hcd(hcd);
143
144	return 0;
145}
146
147#ifdef CONFIG_PM
148static int ehci_hcd_sead3_drv_suspend(struct device *dev)
149{
150	struct usb_hcd *hcd = dev_get_drvdata(dev);
151	bool do_wakeup = device_may_wakeup(dev);
152
153	return ehci_suspend(hcd, do_wakeup);
154}
155
156static int ehci_hcd_sead3_drv_resume(struct device *dev)
157{
158	struct usb_hcd *hcd = dev_get_drvdata(dev);
159
160	ehci_resume(hcd, false);
161	return 0;
162}
163
164static const struct dev_pm_ops sead3_ehci_pmops = {
165	.suspend	= ehci_hcd_sead3_drv_suspend,
166	.resume		= ehci_hcd_sead3_drv_resume,
167};
168
169#define SEAD3_EHCI_PMOPS (&sead3_ehci_pmops)
170
171#else
172#define SEAD3_EHCI_PMOPS NULL
173#endif
174
175static struct platform_driver ehci_hcd_sead3_driver = {
176	.probe		= ehci_hcd_sead3_drv_probe,
177	.remove		= ehci_hcd_sead3_drv_remove,
178	.shutdown	= usb_hcd_platform_shutdown,
179	.driver = {
180		.name	= "sead3-ehci",
181		.pm	= SEAD3_EHCI_PMOPS,
182	}
183};
184
185MODULE_ALIAS("platform:sead3-ehci");
186