2 * dwc3-pci.c - PCI Specific glue layer
4 * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
6 * Authors: Felipe Balbi <balbi@ti.com>,
7 * Sebastian Andrzej Siewior <bigeasy@linutronix.de>
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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.
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.
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
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31 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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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>
45 /* FIXME define these in <linux/pci_ids.h> */
46 #define PCI_VENDOR_ID_SYNOPSYS 0x16c3
47 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
49 #define DWC3_PCI_DEVS_POSSIBLE 32
53 struct platform_device *dwc3;
56 static DECLARE_BITMAP(dwc3_pci_devs, DWC3_PCI_DEVS_POSSIBLE);
58 static int dwc3_pci_get_device_id(struct dwc3_pci *glue)
63 id = find_first_zero_bit(dwc3_pci_devs, DWC3_PCI_DEVS_POSSIBLE);
64 if (id < DWC3_PCI_DEVS_POSSIBLE) {
67 old = test_and_set_bit(id, dwc3_pci_devs);
71 dev_err(glue->dev, "no space for new device\n");
78 static void dwc3_pci_put_device_id(struct dwc3_pci *glue, int id)
85 ret = test_bit(id, dwc3_pci_devs);
86 WARN(!ret, "Device: %s\nID %d not in use\n",
87 dev_driver_string(glue->dev), id);
88 clear_bit(id, dwc3_pci_devs);
91 static int __devinit dwc3_pci_probe(struct pci_dev *pci,
92 const struct pci_device_id *id)
94 struct resource res[2];
95 struct platform_device *dwc3;
96 struct dwc3_pci *glue;
100 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
102 dev_err(&pci->dev, "not enough memory\n");
106 glue->dev = &pci->dev;
108 ret = pci_enable_device(pci);
110 dev_err(&pci->dev, "failed to enable pci device\n");
114 pci_set_power_state(pci, PCI_D0);
117 devid = dwc3_pci_get_device_id(glue);
121 dwc3 = platform_device_alloc("dwc3", devid);
123 dev_err(&pci->dev, "couldn't allocate dwc3 device\n");
127 memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
129 res[0].start = pci_resource_start(pci, 0);
130 res[0].end = pci_resource_end(pci, 0);
131 res[0].name = "dwc_usb3";
132 res[0].flags = IORESOURCE_MEM;
134 res[1].start = pci->irq;
135 res[1].name = "dwc_usb3";
136 res[1].flags = IORESOURCE_IRQ;
138 ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
140 dev_err(&pci->dev, "couldn't add resources to dwc3 device\n");
144 pci_set_drvdata(pci, glue);
146 dma_set_coherent_mask(&dwc3->dev, pci->dev.coherent_dma_mask);
148 dwc3->dev.dma_mask = pci->dev.dma_mask;
149 dwc3->dev.dma_parms = pci->dev.dma_parms;
150 dwc3->dev.parent = &pci->dev;
153 ret = platform_device_add(dwc3);
155 dev_err(&pci->dev, "failed to register dwc3 device\n");
162 pci_set_drvdata(pci, NULL);
163 platform_device_put(dwc3);
166 dwc3_pci_put_device_id(glue, devid);
169 pci_disable_device(pci);
178 static void __devexit dwc3_pci_remove(struct pci_dev *pci)
180 struct dwc3_pci *glue = pci_get_drvdata(pci);
182 dwc3_pci_put_device_id(glue, glue->dwc3->id);
183 platform_device_unregister(glue->dwc3);
184 pci_set_drvdata(pci, NULL);
185 pci_disable_device(pci);
189 static DEFINE_PCI_DEVICE_TABLE(dwc3_pci_id_table) = {
191 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
192 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
194 { } /* Terminating Entry */
196 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
198 static struct pci_driver dwc3_pci_driver = {
200 .id_table = dwc3_pci_id_table,
201 .probe = dwc3_pci_probe,
202 .remove = __devexit_p(dwc3_pci_remove),
205 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
206 MODULE_LICENSE("Dual BSD/GPL");
207 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
209 static int __devinit dwc3_pci_init(void)
211 return pci_register_driver(&dwc3_pci_driver);
213 module_init(dwc3_pci_init);
215 static void __exit dwc3_pci_exit(void)
217 pci_unregister_driver(&dwc3_pci_driver);
219 module_exit(dwc3_pci_exit);