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->rsrc_start = res->start;
114	hcd->rsrc_len = resource_size(res);
115
116	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
117	if (IS_ERR(hcd->regs)) {
118		ret = PTR_ERR(hcd->regs);
119		goto err1;
120	}
121
122	/* Root hub has integrated TT. */
123	hcd->has_tt = 1;
124
125	ret = usb_add_hcd(hcd, pdev->resource[1].start,
126			  IRQF_SHARED);
127	if (ret == 0) {
128		platform_set_drvdata(pdev, hcd);
129		device_wakeup_enable(hcd->self.controller);
130		return ret;
131	}
132
133err1:
134	usb_put_hcd(hcd);
135	return ret;
136}
137
138static int ehci_hcd_sead3_drv_remove(struct platform_device *pdev)
139{
140	struct usb_hcd *hcd = platform_get_drvdata(pdev);
141
142	usb_remove_hcd(hcd);
143	usb_put_hcd(hcd);
144
145	return 0;
146}
147
148#ifdef CONFIG_PM
149static int ehci_hcd_sead3_drv_suspend(struct device *dev)
150{
151	struct usb_hcd *hcd = dev_get_drvdata(dev);
152	bool do_wakeup = device_may_wakeup(dev);
153
154	return ehci_suspend(hcd, do_wakeup);
155}
156
157static int ehci_hcd_sead3_drv_resume(struct device *dev)
158{
159	struct usb_hcd *hcd = dev_get_drvdata(dev);
160
161	ehci_resume(hcd, false);
162	return 0;
163}
164
165static const struct dev_pm_ops sead3_ehci_pmops = {
166	.suspend	= ehci_hcd_sead3_drv_suspend,
167	.resume		= ehci_hcd_sead3_drv_resume,
168};
169
170#define SEAD3_EHCI_PMOPS (&sead3_ehci_pmops)
171
172#else
173#define SEAD3_EHCI_PMOPS NULL
174#endif
175
176static struct platform_driver ehci_hcd_sead3_driver = {
177	.probe		= ehci_hcd_sead3_drv_probe,
178	.remove		= ehci_hcd_sead3_drv_remove,
179	.shutdown	= usb_hcd_platform_shutdown,
180	.driver = {
181		.name	= "sead3-ehci",
182		.owner	= THIS_MODULE,
183		.pm	= SEAD3_EHCI_PMOPS,
184	}
185};
186
187MODULE_ALIAS("platform:sead3-ehci");