1// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
  2/*
  3 * pci.c - DesignWare HS OTG Controller PCI driver
  4 *
  5 * Copyright (C) 2004-2013 Synopsys, Inc.
  6 *
  7 * Redistribution and use in source and binary forms, with or without
  8 * modification, are permitted provided that the following conditions
  9 * are met:
 10 * 1. Redistributions of source code must retain the above copyright
 11 *    notice, this list of conditions, and the following disclaimer,
 12 *    without modification.
 13 * 2. Redistributions in binary form must reproduce the above copyright
 14 *    notice, this list of conditions and the following disclaimer in the
 15 *    documentation and/or other materials provided with the distribution.
 16 * 3. The names of the above-listed copyright holders may not be used
 17 *    to endorse or promote products derived from this software without
 18 *    specific prior written permission.
 19 *
 20 * ALTERNATIVELY, this software may be distributed under the terms of the
 21 * GNU General Public License ("GPL") as published by the Free Software
 22 * Foundation; either version 2 of the License, or (at your option) any
 23 * later version.
 24 *
 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 26 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 27 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 29 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 30 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 31 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 32 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 36 */
 37
 38/*
 39 * Provides the initialization and cleanup entry points for the DWC_otg PCI
 40 * driver
 41 */
 42#include <linux/kernel.h>
 43#include <linux/module.h>
 44#include <linux/moduleparam.h>
 45#include <linux/spinlock.h>
 46#include <linux/interrupt.h>
 47#include <linux/io.h>
 48#include <linux/slab.h>
 49#include <linux/pci.h>
 50#include <linux/usb.h>
 51
 52#include <linux/usb/hcd.h>
 53#include <linux/usb/ch11.h>
 54#include <linux/platform_device.h>
 55#include <linux/usb/usb_phy_generic.h>
 56
 57#define PCI_PRODUCT_ID_HAPS_HSOTG	0xabc0
 58
 59static const char dwc2_driver_name[] = "dwc2-pci";
 60
 61struct dwc2_pci_glue {
 62	struct platform_device *dwc2;
 63	struct platform_device *phy;
 64};
 65
 66/**
 67 * dwc2_pci_remove() - Provides the cleanup entry points for the DWC_otg PCI
 68 * driver
 69 *
 70 * @pci: The programming view of DWC_otg PCI
 71 */
 72static void dwc2_pci_remove(struct pci_dev *pci)
 73{
 74	struct dwc2_pci_glue *glue = pci_get_drvdata(pci);
 75
 76	platform_device_unregister(glue->dwc2);
 77	usb_phy_generic_unregister(glue->phy);
 78	pci_set_drvdata(pci, NULL);
 79}
 80
 81static int dwc2_pci_probe(struct pci_dev *pci,
 82			  const struct pci_device_id *id)
 83{
 84	struct resource		res[2];
 85	struct platform_device	*dwc2;
 86	struct platform_device	*phy;
 87	int			ret;
 88	struct device		*dev = &pci->dev;
 89	struct dwc2_pci_glue	*glue;
 90
 91	ret = pcim_enable_device(pci);
 92	if (ret) {
 93		dev_err(dev, "failed to enable pci device\n");
 94		return -ENODEV;
 95	}
 96
 97	pci_set_master(pci);
 98
 99	phy = usb_phy_generic_register();
100	if (IS_ERR(phy)) {
101		dev_err(dev, "error registering generic PHY (%ld)\n",
102			PTR_ERR(phy));
103		return PTR_ERR(phy);
104	}
105
106	dwc2 = platform_device_alloc("dwc2", PLATFORM_DEVID_AUTO);
107	if (!dwc2) {
108		dev_err(dev, "couldn't allocate dwc2 device\n");
109		ret = -ENOMEM;
110		goto err;
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		goto err;
128	}
129
130	dwc2->dev.parent = dev;
131
132	glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
133	if (!glue) {
134		ret = -ENOMEM;
135		goto err;
136	}
137
138	ret = platform_device_add(dwc2);
139	if (ret) {
140		dev_err(dev, "failed to register dwc2 device\n");
141		goto err;
142	}
143
144	glue->phy = phy;
145	glue->dwc2 = dwc2;
146	pci_set_drvdata(pci, glue);
147
148	return 0;
149err:
150	usb_phy_generic_unregister(phy);
151	platform_device_put(dwc2);
152	return ret;
153}
154
155static const struct pci_device_id dwc2_pci_ids[] = {
156	{
157		PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG),
158	},
159	{
160		PCI_DEVICE(PCI_VENDOR_ID_STMICRO,
161			   PCI_DEVICE_ID_STMICRO_USB_OTG),
162	},
163	{ /* end: all zeroes */ }
164};
165MODULE_DEVICE_TABLE(pci, dwc2_pci_ids);
166
167static struct pci_driver dwc2_pci_driver = {
168	.name = dwc2_driver_name,
169	.id_table = dwc2_pci_ids,
170	.probe = dwc2_pci_probe,
171	.remove = dwc2_pci_remove,
172};
173
174module_pci_driver(dwc2_pci_driver);
175
176MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue");
177MODULE_AUTHOR("Synopsys, Inc.");
178MODULE_LICENSE("Dual BSD/GPL");