1/*
  2 * host.c - ChipIdea USB host controller driver
  3 *
  4 * Copyright (c) 2012 Intel Corporation
  5 *
  6 * Author: Alexander Shishkin
  7 *
  8 * This program is free software; you can redistribute it and/or modify
  9 * it under the terms of the GNU General Public License version 2 as
 10 * published by the Free Software Foundation.
 11 *
 12 * This program is distributed in the hope that it will be useful,
 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 15 * GNU General Public License 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
 19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 20 */
 21
 22#include <linux/kernel.h>
 23#include <linux/usb.h>
 24#include <linux/usb/hcd.h>
 25#include <linux/usb/chipidea.h>
 26
 27#define CHIPIDEA_EHCI
 28#include "../host/ehci-hcd.c"
 29
 30#include "ci.h"
 31#include "bits.h"
 32#include "host.h"
 33
 34static int ci_ehci_setup(struct usb_hcd *hcd)
 35{
 36	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 37	int ret;
 38
 39	hcd->has_tt = 1;
 40
 41	ret = ehci_setup(hcd);
 42	if (ret)
 43		return ret;
 44
 45	ehci_port_power(ehci, 0);
 46
 47	return ret;
 48}
 49
 50static const struct hc_driver ci_ehci_hc_driver = {
 51	.description	= "ehci_hcd",
 52	.product_desc	= "ChipIdea HDRC EHCI",
 53	.hcd_priv_size	= sizeof(struct ehci_hcd),
 54
 55	/*
 56	 * generic hardware linkage
 57	 */
 58	.irq	= ehci_irq,
 59	.flags	= HCD_MEMORY | HCD_USB2,
 60
 61	/*
 62	 * basic lifecycle operations
 63	 */
 64	.reset		= ci_ehci_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 irqreturn_t host_irq(struct ci13xxx *ci)
 96{
 97	return usb_hcd_irq(ci->irq, ci->hcd);
 98}
 99
100static int host_start(struct ci13xxx *ci)
101{
102	struct usb_hcd *hcd;
103	struct ehci_hcd *ehci;
104	int ret;
105
106	if (usb_disabled())
107		return -ENODEV;
108
109	hcd = usb_create_hcd(&ci_ehci_hc_driver, ci->dev, dev_name(ci->dev));
110	if (!hcd)
111		return -ENOMEM;
112
113	dev_set_drvdata(ci->dev, ci);
114	hcd->rsrc_start = ci->hw_bank.phys;
115	hcd->rsrc_len = ci->hw_bank.size;
116	hcd->regs = ci->hw_bank.abs;
117	hcd->has_tt = 1;
118
119	hcd->power_budget = ci->udc_driver->power_budget;
120
121	ehci = hcd_to_ehci(hcd);
122	ehci->caps = ci->hw_bank.cap;
123	ehci->has_hostpc = ci->hw_bank.lpm;
124
125	ret = usb_add_hcd(hcd, 0, 0);
126	if (ret)
127		usb_put_hcd(hcd);
128	else
129		ci->hcd = hcd;
130
131	return ret;
132}
133
134static void host_stop(struct ci13xxx *ci)
135{
136	struct usb_hcd *hcd = ci->hcd;
137
138	usb_remove_hcd(hcd);
139	usb_put_hcd(hcd);
140}
141
142int ci_hdrc_host_init(struct ci13xxx *ci)
143{
144	struct ci_role_driver *rdrv;
145
146	if (!hw_read(ci, CAP_DCCPARAMS, DCCPARAMS_HC))
147		return -ENXIO;
148
149	rdrv = devm_kzalloc(ci->dev, sizeof(struct ci_role_driver), GFP_KERNEL);
150	if (!rdrv)
151		return -ENOMEM;
152
153	rdrv->start	= host_start;
154	rdrv->stop	= host_stop;
155	rdrv->irq	= host_irq;
156	rdrv->name	= "host";
157	ci->roles[CI_ROLE_HOST] = rdrv;
158
159	return 0;
160}