1/*
  2 * pci.c - DesignWare HS OTG Controller PCI driver
  3 *
  4 * Copyright (C) 2004-2013 Synopsys, Inc.
  5 *
  6 * Redistribution and use in source and binary forms, with or without
  7 * modification, are permitted provided that the following conditions
  8 * are met:
  9 * 1. Redistributions of source code must retain the above copyright
 10 *    notice, this list of conditions, and the following disclaimer,
 11 *    without modification.
 12 * 2. Redistributions in binary form must reproduce the above copyright
 13 *    notice, this list of conditions and the following disclaimer in the
 14 *    documentation and/or other materials provided with the distribution.
 15 * 3. The names of the above-listed copyright holders may not be used
 16 *    to endorse or promote products derived from this software without
 17 *    specific prior written permission.
 18 *
 19 * ALTERNATIVELY, this software may be distributed under the terms of the
 20 * GNU General Public License ("GPL") as published by the Free Software
 21 * Foundation; either version 2 of the License, or (at your option) any
 22 * later version.
 23 *
 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 25 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 26 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 28 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 29 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 30 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 31 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 32 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 33 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 34 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 35 */
 36
 37/*
 38 * Provides the initialization and cleanup entry points for the DWC_otg PCI
 39 * driver
 40 */
 41#include <linux/kernel.h>
 42#include <linux/module.h>
 43#include <linux/moduleparam.h>
 44#include <linux/spinlock.h>
 45#include <linux/interrupt.h>
 46#include <linux/io.h>
 47#include <linux/slab.h>
 48#include <linux/pci.h>
 49#include <linux/usb.h>
 50
 51#include <linux/usb/hcd.h>
 52#include <linux/usb/ch11.h>
 53#include <linux/platform_device.h>
 54#include <linux/usb/usb_phy_generic.h>
 55
 56#define PCI_PRODUCT_ID_HAPS_HSOTG	0xabc0
 57
 58static const char dwc2_driver_name[] = "dwc2-pci";
 59
 60struct dwc2_pci_glue {
 61	struct platform_device *dwc2;
 62	struct platform_device *phy;
 63};
 64
 65static int dwc2_pci_quirks(struct pci_dev *pdev, struct platform_device *dwc2)
 66{
 67	if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
 68	    pdev->device == PCI_PRODUCT_ID_HAPS_HSOTG) {
 69		struct property_entry properties[] = {
 70			{ },
 71		};
 72
 73		return platform_device_add_properties(dwc2, properties);
 74	}
 75
 76	return 0;
 77}
 78
 79static void dwc2_pci_remove(struct pci_dev *pci)
 80{
 81	struct dwc2_pci_glue *glue = pci_get_drvdata(pci);
 82
 83	platform_device_unregister(glue->dwc2);
 84	usb_phy_generic_unregister(glue->phy);
 85	kfree(glue);
 86	pci_set_drvdata(pci, NULL);
 87}
 88
 89static int dwc2_pci_probe(struct pci_dev *pci,
 90		const struct pci_device_id *id)
 91{
 92	struct resource		res[2];
 93	struct platform_device	*dwc2;
 94	struct platform_device	*phy;
 95	int			ret;
 96	struct device		*dev = &pci->dev;
 97	struct dwc2_pci_glue	*glue;
 98
 99	ret = pcim_enable_device(pci);
100	if (ret) {
101		dev_err(dev, "failed to enable pci device\n");
102		return -ENODEV;
103	}
104
105	pci_set_master(pci);
106
107	dwc2 = platform_device_alloc("dwc2", PLATFORM_DEVID_AUTO);
108	if (!dwc2) {
109		dev_err(dev, "couldn't allocate dwc2 device\n");
110		return -ENOMEM;
111	}
112
113	memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
114
115	res[0].start	= pci_resource_start(pci, 0);
116	res[0].end	= pci_resource_end(pci, 0);
117	res[0].name	= "dwc2";
118	res[0].flags	= IORESOURCE_MEM;
119
120	res[1].start	= pci->irq;
121	res[1].name	= "dwc2";
122	res[1].flags	= IORESOURCE_IRQ;
123
124	ret = platform_device_add_resources(dwc2, res, ARRAY_SIZE(res));
125	if (ret) {
126		dev_err(dev, "couldn't add resources to dwc2 device\n");
127		return ret;
128	}
129
130	dwc2->dev.parent = dev;
131
132	phy = usb_phy_generic_register();
133	if (IS_ERR(phy)) {
134		dev_err(dev, "error registering generic PHY (%ld)\n",
135			PTR_ERR(phy));
136		return PTR_ERR(phy);
137	}
138
139	ret = dwc2_pci_quirks(pci, dwc2);
140	if (ret)
141		goto err;
142
143	ret = platform_device_add(dwc2);
144	if (ret) {
145		dev_err(dev, "failed to register dwc2 device\n");
146		goto err;
147	}
148
149	glue = kzalloc(sizeof(*glue), GFP_KERNEL);
150	if (!glue)
151		return -ENOMEM;
152
153	glue->phy = phy;
154	glue->dwc2 = dwc2;
155	pci_set_drvdata(pci, glue);
156
157	return 0;
158err:
159	usb_phy_generic_unregister(phy);
160	platform_device_put(dwc2);
161	return ret;
162}
163
164static const struct pci_device_id dwc2_pci_ids[] = {
165	{
166		PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG),
167	},
168	{
169		PCI_DEVICE(PCI_VENDOR_ID_STMICRO,
170			   PCI_DEVICE_ID_STMICRO_USB_OTG),
171	},
172	{ /* end: all zeroes */ }
173};
174MODULE_DEVICE_TABLE(pci, dwc2_pci_ids);
175
176static struct pci_driver dwc2_pci_driver = {
177	.name = dwc2_driver_name,
178	.id_table = dwc2_pci_ids,
179	.probe = dwc2_pci_probe,
180	.remove = dwc2_pci_remove,
181};
182
183module_pci_driver(dwc2_pci_driver);
184
185MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue");
186MODULE_AUTHOR("Synopsys, Inc.");
187MODULE_LICENSE("Dual BSD/GPL");