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 void dwc2_pci_remove(struct pci_dev *pci)
 66{
 67	struct dwc2_pci_glue *glue = pci_get_drvdata(pci);
 68
 69	platform_device_unregister(glue->dwc2);
 70	usb_phy_generic_unregister(glue->phy);
 71	kfree(glue);
 72	pci_set_drvdata(pci, NULL);
 73}
 74
 75static int dwc2_pci_probe(struct pci_dev *pci,
 76		const struct pci_device_id *id)
 77{
 78	struct resource		res[2];
 79	struct platform_device	*dwc2;
 80	struct platform_device	*phy;
 81	int			ret;
 82	struct device		*dev = &pci->dev;
 83	struct dwc2_pci_glue	*glue;
 84
 85	ret = pcim_enable_device(pci);
 86	if (ret) {
 87		dev_err(dev, "failed to enable pci device\n");
 88		return -ENODEV;
 89	}
 90
 91	pci_set_master(pci);
 92
 93	dwc2 = platform_device_alloc("dwc2", PLATFORM_DEVID_AUTO);
 94	if (!dwc2) {
 95		dev_err(dev, "couldn't allocate dwc2 device\n");
 96		return -ENOMEM;
 97	}
 98
 99	memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
100
101	res[0].start	= pci_resource_start(pci, 0);
102	res[0].end	= pci_resource_end(pci, 0);
103	res[0].name	= "dwc2";
104	res[0].flags	= IORESOURCE_MEM;
105
106	res[1].start	= pci->irq;
107	res[1].name	= "dwc2";
108	res[1].flags	= IORESOURCE_IRQ;
109
110	ret = platform_device_add_resources(dwc2, res, ARRAY_SIZE(res));
111	if (ret) {
112		dev_err(dev, "couldn't add resources to dwc2 device\n");
113		return ret;
114	}
115
116	dwc2->dev.parent = dev;
117
118	phy = usb_phy_generic_register();
119	if (IS_ERR(phy)) {
120		dev_err(dev, "error registering generic PHY (%ld)\n",
121			PTR_ERR(phy));
122		return PTR_ERR(phy);
123	}
124
125	ret = platform_device_add(dwc2);
126	if (ret) {
127		dev_err(dev, "failed to register dwc2 device\n");
128		goto err;
129	}
130
131	glue = kzalloc(sizeof(*glue), GFP_KERNEL);
132	if (!glue)
133		return -ENOMEM;
134
135	glue->phy = phy;
136	glue->dwc2 = dwc2;
137	pci_set_drvdata(pci, glue);
138
139	return 0;
140err:
141	usb_phy_generic_unregister(phy);
142	platform_device_put(dwc2);
143	return ret;
144}
145
146static const struct pci_device_id dwc2_pci_ids[] = {
147	{
148		PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, PCI_PRODUCT_ID_HAPS_HSOTG),
149	},
150	{
151		PCI_DEVICE(PCI_VENDOR_ID_STMICRO,
152			   PCI_DEVICE_ID_STMICRO_USB_OTG),
153	},
154	{ /* end: all zeroes */ }
155};
156MODULE_DEVICE_TABLE(pci, dwc2_pci_ids);
157
158static struct pci_driver dwc2_pci_driver = {
159	.name = dwc2_driver_name,
160	.id_table = dwc2_pci_ids,
161	.probe = dwc2_pci_probe,
162	.remove = dwc2_pci_remove,
163};
164
165module_pci_driver(dwc2_pci_driver);
166
167MODULE_DESCRIPTION("DESIGNWARE HS OTG PCI Bus Glue");
168MODULE_AUTHOR("Synopsys, Inc.");
169MODULE_LICENSE("Dual BSD/GPL");