1/**
  2 * dwc3-pci.c - PCI Specific glue layer
  3 *
  4 * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
  5 *
  6 * Authors: Felipe Balbi <balbi@ti.com>,
  7 *	    Sebastian Andrzej Siewior <bigeasy@linutronix.de>
  8 *
  9 * Redistribution and use in source and binary forms, with or without
 10 * modification, are permitted provided that the following conditions
 11 * are met:
 12 * 1. Redistributions of source code must retain the above copyright
 13 *    notice, this list of conditions, and the following disclaimer,
 14 *    without modification.
 15 * 2. Redistributions in binary form must reproduce the above copyright
 16 *    notice, this list of conditions and the following disclaimer in the
 17 *    documentation and/or other materials provided with the distribution.
 18 * 3. The names of the above-listed copyright holders may not be used
 19 *    to endorse or promote products derived from this software without
 20 *    specific prior written permission.
 21 *
 22 * ALTERNATIVELY, this software may be distributed under the terms of the
 23 * GNU General Public License ("GPL") version 2, as published by the Free
 24 * Software Foundation.
 25 *
 26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 27 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 28 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 30 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 31 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 32 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 33 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 34 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 35 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 36 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 37 */
 38
 39#include <linux/kernel.h>
 40#include <linux/module.h>
 41#include <linux/slab.h>
 42#include <linux/pci.h>
 43#include <linux/platform_device.h>
 44
 45#include "core.h"
 46
 47/* FIXME define these in <linux/pci_ids.h> */
 48#define PCI_VENDOR_ID_SYNOPSYS		0x16c3
 49#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3	0xabcd
 50
 51struct dwc3_pci {
 52	struct device		*dev;
 53	struct platform_device	*dwc3;
 54};
 55
 56static int __devinit dwc3_pci_probe(struct pci_dev *pci,
 57		const struct pci_device_id *id)
 58{
 59	struct resource		res[2];
 60	struct platform_device	*dwc3;
 61	struct dwc3_pci		*glue;
 62	int			ret = -ENOMEM;
 63	int			devid;
 64	struct device		*dev = &pci->dev;
 65
 66	glue = devm_kzalloc(dev, sizeof(*glue), GFP_KERNEL);
 67	if (!glue) {
 68		dev_err(dev, "not enough memory\n");
 69		return -ENOMEM;
 70	}
 71
 72	glue->dev = dev;
 73
 74	ret = pci_enable_device(pci);
 75	if (ret) {
 76		dev_err(dev, "failed to enable pci device\n");
 77		return -ENODEV;
 78	}
 79
 80	pci_set_power_state(pci, PCI_D0);
 81	pci_set_master(pci);
 82
 83	devid = dwc3_get_device_id();
 84	if (devid < 0) {
 85		ret = -ENOMEM;
 86		goto err1;
 87	}
 88
 89	dwc3 = platform_device_alloc("dwc3", devid);
 90	if (!dwc3) {
 91		dev_err(dev, "couldn't allocate dwc3 device\n");
 92		ret = -ENOMEM;
 93		goto err1;
 94	}
 95
 96	memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 97
 98	res[0].start	= pci_resource_start(pci, 0);
 99	res[0].end	= pci_resource_end(pci, 0);
100	res[0].name	= "dwc_usb3";
101	res[0].flags	= IORESOURCE_MEM;
102
103	res[1].start	= pci->irq;
104	res[1].name	= "dwc_usb3";
105	res[1].flags	= IORESOURCE_IRQ;
106
107	ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
108	if (ret) {
109		dev_err(dev, "couldn't add resources to dwc3 device\n");
110		goto err2;
111	}
112
113	pci_set_drvdata(pci, glue);
114
115	dma_set_coherent_mask(&dwc3->dev, dev->coherent_dma_mask);
116
117	dwc3->dev.dma_mask = dev->dma_mask;
118	dwc3->dev.dma_parms = dev->dma_parms;
119	dwc3->dev.parent = dev;
120	glue->dwc3 = dwc3;
121
122	ret = platform_device_add(dwc3);
123	if (ret) {
124		dev_err(dev, "failed to register dwc3 device\n");
125		goto err3;
126	}
127
128	return 0;
129
130err3:
131	pci_set_drvdata(pci, NULL);
132	platform_device_put(dwc3);
133
134err2:
135	dwc3_put_device_id(devid);
136
137err1:
138	pci_disable_device(pci);
139
140	return ret;
141}
142
143static void __devexit dwc3_pci_remove(struct pci_dev *pci)
144{
145	struct dwc3_pci	*glue = pci_get_drvdata(pci);
146
147	dwc3_put_device_id(glue->dwc3->id);
148	platform_device_unregister(glue->dwc3);
149	pci_set_drvdata(pci, NULL);
150	pci_disable_device(pci);
151}
152
153static DEFINE_PCI_DEVICE_TABLE(dwc3_pci_id_table) = {
154	{
155		PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
156				PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
157	},
158	{  }	/* Terminating Entry */
159};
160MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
161
162static struct pci_driver dwc3_pci_driver = {
163	.name		= "dwc3-pci",
164	.id_table	= dwc3_pci_id_table,
165	.probe		= dwc3_pci_probe,
166	.remove		= __devexit_p(dwc3_pci_remove),
167};
168
169MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
170MODULE_LICENSE("Dual BSD/GPL");
171MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
172
173module_pci_driver(dwc3_pci_driver);